• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a pneumatic wheel supply system comprising a bearing support (10), a shaft (20) comprising a radially extending end (21) forming a hub (Y), at least one bearing set bearing (30), wherein the system further comprises a chamber (C) formed by the hub end (21), the bearing support (10), a bearing seal (40) and a chamber seal ( 50), a primary channel (60) passing through the bearing support (10) and opening into the chamber (C), A secondary channel (70) passing through the end (21) forming a hub and opening into the chamber (C), wherein seals seal the cavity (C) to allow air to pass from the primary channel to the secondary channel via the cavity (C).
    公开号:FR3037533A1
    申请号:FR1555500
    申请日:2015-06-16
    公开日:2016-12-23
    发明作者:Stephane Vidal；Marc Perot；Sylvain Michon
    申请人:Poclain Hydraulics Industrie；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION The invention relates to pneumatic supply systems for controlling and inflating the state of inflation of the wheels of vehicles. More particularly, the invention relates to such systems in the motorized wheel frame locally by a rotating shaft hydraulic machine. STATE OF THE ART Adjusting the inflation of the wheels is frequent on agricultural machinery or construction machinery to increase or decrease the surface contact with the ground. On conventional axles, without a hydraulic machine, the supply of compressed air is via the fixed axle of the wheel axle.
    [0002] In the context of a wheel motorized locally by a hydraulic machine with rotating shaft, the wheel is rotated by the shaft of the hydraulic machine, the shaft being carried by a rolling bearing. Therefore, for the supply of compressed air into the wheel, a connection between a fixed part and a rotating connection is necessary. Due to the conditions of use of such vehicles, the system must be integrated.
    [0003] Existing solutions involve architectural modifications that deport the wheel to the outside or that weaken existing components, including creating channels in the axle that can weaken the structure due to corrosion caused by compressed air (humidity, etc.). PRESENTATION OF THE INVENTION The present invention aims at overcoming these various drawbacks, by proposing a system for pneumatic wheel supply comprising: a bearing support, a shaft extending along a longitudinal axis inside the bearing support and comprising a radially extending hub end, the shaft being configured to be rotated by a hydraulic machine, - at least one bearing bearing set, disposed between the bearing support and the bearing shaft for rotation of said shaft in the bearing support about the longitudinal axis, wherein the system further comprises: - a chamber formed by the hub end, the bearing support, a bearing seal and a seal chamber, 20 - A primary channel passing through the bearing support and opening into the chamber, - A secondary channel passing through the end forming a hub and opening into the chamber, in which: - the seal of the bearing, disposed longitudinally between the bearing bearing play and the chamber, is in contact with the bearing support and the shaft for sealing between the shaft configured to be rotatable and the bearing support configured for The chamber seal is in contact with the bearing support and the hub end to seal between the hub end configured to be rotatable and the bearing bracket configured to be stationary.
    [0004] The invention aims to allow the supply of compressed air of a tire mounted on a rim of the vehicle. The chamber allows fluid communication between rotating parts and stationary parts. The joints allow the creation of such a sealed chamber. The two channels serve to transmit the compressed air from the fixed bearing support to the rotating rim.
    [0005] The invention also includes the following features, taken alone or in combination: the hub end comprises a longitudinal extension which faces an end of the bearing support, whereby the end of the bearing support is radially located between the shaft and the longitudinal extension, - the chamber seal is positioned radially between the end of the bearing support and the longitudinal extension, - the bearing seal and the chamber seal are located in the same radial plane the primary channel comprises a rectilinear channel portion 25 extending longitudinally in the end of the bearing support and opening into the chamber, the system comprising a second channel portion extending parallel to the channel portion, in order to have portions 30 with smaller cross sections, - the secondary channel passes longitudinally in the hub end, 3037533 4 - the end the hub comprises a fastening zone and the secondary channel connects the chamber to said fastening zone; the secondary channel opens into the fastening zone at an angle of between 30 and 60 ° with respect to the longitudinal axis; the secondary channel comprises a first portion extending longitudinally from the attachment zone and a second portion connecting the chamber to the first portion; further comprising a protective seal positioned radially between the bearing support and the longitudinal extension for protecting the chamber gasket, said chamber gasket thus being located longitudinally between the chamber and the additional gasket, - the bearing bearings are lubricated with grease, 20 - The system comprises a second set of bearings bearing separate from the gasket. other bearing set by a seal, - The second set of bearings is lubricated with oil.
    [0006] The invention also provides an assembly comprising: - a system as previously described, - the means for supplying compressed air with a hose, for supplying compressed air, - a rim, 30 in which: - the rim It is integral with the hub end, the pipe feeds the first channel with compressed air, the rim is fed with air through the second channel via the chamber. The invention proposes a vehicle comprising an assembly as described above. Said vehicles may be road vehicles, but also agricultural machinery or public works machinery, and, in the broad sense, all machines having a wheel (for example trucks, etc.) and which comprise an air supply compressed tire 10 mounted on a rim. The invention finally proposes a method of assembling a system as described above, comprising steps: - of equipment of a bearing support, 15 - of equipment of a tree, - of laying the support of bearing and shaft, - bearing bracket assembly and shaft. The method may comprise the following substeps: the step of equipping the bearing support comprises placing a raceway of a metal seal of a protective seal; of the shaft comprises the installation of a chamber seal and a bearing seal, the establishment of a running track and the corresponding bearing, 25 - the assembly step of the support Bearing and shaft includes setting up a wedge and an elastic ring. PRESENTATION OF THE FIGURES Other features, objects and advantages of the invention will emerge from the description which follows, which is purely illustrative and nonlimiting, and which should be read with reference to the accompanying drawings, in which: FIG. 1 is a sectional view of an assembly comprising a system according to an embodiment of the invention and a rim and means for supplying compressed air; FIG. 2 is a sectional view of FIG. According to this embodiment of the invention, FIG. 3 shows a three-dimensional view of a system according to this embodiment of the invention; FIG. 4 represents an enlarged view of a embodiment of the seals, - Figure 5 shows a sectional view along a plane orthogonal to the longitudinal axis of the seals, shafts, bearing support in particular, - Figure 6 shows a three-dimensional magnification of a mode realization of FIG. 7 and 8 show an embodiment of the secondary channel; FIGS. 9 and 10 show another embodiment of the secondary channel; FIGS. 11 and 12 represent two embodiments of a secondary channel; FIGS. Figure 13 shows part of a radial piston hydraulic machine; Figure 14 shows various steps of an assembly process. DETAILED DESCRIPTION Referring to FIGS. 1 to 4, there is shown a system 1 comprising a bearing support 10 as well as a shaft 20 which extends along a longitudinal axis X and which comprises an end 21 forming a hub. The bearing support 10 has a general shape of revolution within which the shaft 20 is rotatable.
    [0007] The end 21 forming a hub makes it possible to attach a wheel rim 2a carrying a tire 2b. For this purpose, the end 21 forming a hub extends radially, that is to say it has a dimension in a radial direction Y, orthogonal to the longitudinal axis X, greater than one dimension of the shaft 20 (outside the end 21 forming hub) in the same direction Y. The system is mounted on a vehicle, for example a farm vehicle 10 or site, equipped with rims 2a each carrying a tire 2b. The tire 2b can be inflated to different pressures. In particular, in the context of the invention, the inflation of the tire 2b is done by an air inlet at the rim. The cooperation between the rim 2a and the tire 2b is known and will not be described here. Compressed air supply means 5 can supply the system with compressed air, as will be detailed later. The bearing 20 The shaft 20 is rotating along the longitudinal axis X with respect to the bearing support 10. It is thus defined that the bearing support 10 is fixed. By fixed, we therefore mean relative to a vehicle reference. However, even if the bearing support 10 does not perform rotation related to the movement of the vehicle, it can be mobile in a frame linked to the vehicle when it equips a directional wheel. At least one bearing bearing set is provided between the bearing support 10 and the shaft 20. The bearing comprises rolling tracks and rolling elements on these tracks, such as rollers, balls or any other equivalent means. The rolling elements can be housed in cages to keep them in position. In the exemplary roller bearing shown, tapered rollers 30 are supported on two raceways 31, 32, one integral with the bearing support 3037533 and the other with the shaft 20. The rollers of the bearing are typically housed in cages 33. The bearing bearing set 30 is typically lubricated with grease. Grease provides better lubrication than oil. It works better at high contact pressures, and allows longer bearing life for very high loads on the bearings. Alternatively, to simplify the architecture of the system, the bearing bearing set 30 can be lubricated with oil.
    [0008] A second set of bearing bearings 35 may be provided to form an "O" or "X" mount. This game 35 also has its own tracks of bearings. An inter-rolling joint 36 can separate the two sets of bearings 30, 35 to allow each to have its own lubrication. For example, the second set 35 can be lubricated with oil from a hydraulic machine. In general, bearings can be lubricated with oil, or with grease, or in a mixed way, some with oil and some with grease in the same machine. Be that as it may, bearings that are lubricated with grease must be separated from the oil contained in a casing of the hydraulic machine 96 (see FIG. 1, 13) by a seal. Alternatively, the tracks of the bearings 30 or 35 can be made in one piece with the bearing support 10 or the shaft 20. Longitudinally, these elements are arranged in the following order: end 21 forming a hub, the bearing set 30, the inter-rolling joint 36, the second set of bearings 35, then the hydraulic machine 3. The shaft 20 is preferably rotated by a hydraulic machine 3. The hydraulic machine 3 will be presented at the end of the description. The chamber 3037533 9 In order to be able to feed the rim 2a with compressed air to allow the tire 2b to swell, the system 1 further comprises a chamber C formed by the end 21 forming a hub, the bearing support 10 and two joints: a bearing gasket 40 and a chamber gasket 50 (FIGS. 2, 3). This chamber C, formed between rotating parts and fixed (non-rotating) parts, makes it possible to carry out the interface in the compressed air transmission system from the compressed air supply means 5 towards the rim 2 a ( figure 1). Indeed, a primary channel 60 is provided, which passes through the bearing support 10 to open into the chamber C. This primary channel 60 comprises an inlet orifice 60a, opening on the outer radial surface of the bearing support 10, on which connect a pipe 4 connected to the compressed air supply means 5 (Figure 1). Since the inlet port 60a is on the bearing support 10, it is fixed and can therefore be supplied without difficulty with compressed air. The compressed air is thus injected into the sealed chamber C through the joints 40, 50.
    [0009] A secondary channel 70 is also provided, which passes through the hub end 21 to open into the chamber C. This secondary channel 70 includes an outlet port 70a configured to open into the portion of the hub end 21, which is located substantially in the center or in the central part of the rim 2a (Figure 1). The outlet orifice 70a contains in a known manner sealing and fixing surfaces, typically a thread, for receiving a connection to the tire 2b via the rim. Since the outlet port 70a is on the hub end 21 which is rotating, the function of the chamber C is to provide a fluid connection between the stationary members of the system and the rotating members.
    [0010] An inflation control valve system (not shown in the figures) may be attached to the outlet port 70a to control the flow of air to go into the tire. An inflation orifice (not shown in the figures) present in the rim makes it possible to put the interior of the tire into communication with the outlet orifice 70a, in particular via the inflation control valve, using, for example, of a pipe (not shown in the figures). This pipe may be rigid and formed along its path, or flexible, or have a rigid portion and a flexible portion.
    [0011] More generally, the control valve may be disposed anywhere on the air transmission line between the outlet port 70a of the secondary channel 70 and the inflation port. The fluidic communications are then ensured either by direct fastening or by flexible hoses.
    [0012] The seal is provided by the seals 40, 50 which close the chamber C. The two seals 40, 50 are in the form of a circular seal. The chamber C has a section in a plane orthogonal to the longitudinal axis X ring-shaped, or according to the chosen plane, several concentric rings 20. The seals The rolling seal 40 seals the cavity C at the level of the shaft 20 and the bearing support 10. It is located: - radially between the bearing support 10 and the shaft 20 and - longitudinally between the end 21 forming a hub and the bearing 30. The bearing seal 40 is in contact with both the bearing support 10 30 and the shaft 20, to ensure the sealing of the cavity C during the rotation of the the tree 20.
    [0013] The chamber seal 50 seals the cavity C at the end 21 of the hub and the bearing support 10. In a preferred embodiment, the bearing support 10 comprises an end 11 and the 21 end hub comprises a longitudinal extension 22 which comes longitudinally opposite the end 11 of the bearing support 10. It is thus obtained that the end 11 of the bearing support 10 is radially located between the shaft 20 and the longitudinal extension 22 of the end 21 forming a hub. The end 11 of the bearing support 20 has the shape of a cylindrical shaft 10 which is housed inside a circular groove formed in the end 11 forming a hub. The groove, which comprises an inner radial face 21a, an axial face 22b and an outer radial face 21c, opens onto the bearing support 20. In this configuration, the chamber seal 50 is advantageously positioned between the end 11 of the support bearing 10, that is to say on the outer radial face 21c and the longitudinal extension 22. It seals the cavity C between the longitudinal extension 22 rotating and the end 11 of the bearing support 10 fixed (non-rotating).
    [0014] Advantageously, the two seals 40, 50 are located in the same radial plane or substantially in the same radial plane, that is to say in the same or substantially in the same plane orthogonal to the longitudinal axis. According to a sectional view of the system shown in FIG. 5 (not on a scale), the shaft 20, the rolling joint 40, the end 11, are located in the same plane, orthogonal to the longitudinal axis X. of the bearing support 10, the chamber seal 50 and the longitudinal extension 22. The seals 40, 50 are radially flanked by the shaft 20 and the bearing support 10, or the shaft 20 and the longitudinal extension 22.
    [0015] By substantially in the same plane is meant that there is a radial sectional plane in which the two joints are visible.
    [0016] A seal holder 44 of the hoop type may be disposed between the bearing seal 40 and the bearing support 10 and a wedging support 45 may be disposed between said seal 40 and the shaft 20 (internal radial face 21a). A spacer 46 may be disposed in the chamber C, in contact with the chamber gasket 5, to lock it longitudinally. These arrangements of supports 44, 45 and spacer 46 are necessary only insofar as the device is not specially designed to have the chamber C and the joints 40, 50. In particular, as shown in FIG. Seal support 10 44 is disposed between the bearing seal 40 and the bearing support 10. Such a support 44 makes it possible to implement a standard seal on specific architectures also coming from a standard system without pneumatic supply.
    [0017] Preferably, as shown in FIG. 4, the joints 40, 50 are of the lip-ring type, which are adapted for the rotating parts. In one embodiment, the seals 40, 50 each comprise a liner 41, 51, in fixed contact respectively with the shaft 20 and the hub end 21 (or the seal support 41 where appropriate), and a sealing lip 42, 52, which is in friction with the bearing support 10 (or the seal support 41 if appropriate) and allows the sealing of the cavity C despite the rotation. The two seals 40, 50 are integral with the rotating parts and are thus rotated relative to the bearing support 10. This embodiment is convenient for assembly and assembly of the machine. Nevertheless, one of the two seals 40, 50 may not be rotating (see FIG. 2 for example) and be integral with the bearing support 10. The lining and the sealing lip are connected to one another by a finer intermediate portion offset on one of the edges of the liner and the lip, thereby defining a hollow portion at the opposite edge between the liner and the lip. This hollow portion forms, in a sectional plane shown in the figures, a C. According to one embodiment, the hollow portion faces the chamber C, according to another embodiment, the hollow portion faces the bearings . Additionally, a protective ring can be combined with each lip seal.
    [0018] The primary channel According to a preferred embodiment, the primary channel 60 comprises a rectilinear channel portion 61 extending longitudinally or substantially longitudinally with respect to the longitudinal axis X in the bearing support end 11. The channel portion 61 opens into the chamber C. In order to connect the channel portion 61 to the inlet port 60a, a straight line 62 is provided. The latter extends radially, or substantially radially, that is to say orthogonal or substantially orthogonal to the longitudinal axis X. The inlet orifice 60a contains unrepresented fastening means, for example a thread and means sealing, to connect to the pipe 4 in a known manner.
    [0019] The arrangement of the primary channel 60 in a rectilinear channel portion 61 and a rectilinear conduit 62 which intersect in the bearing support 10 allows their formation in the bearing support 10 by simple drilling. To limit material shrinkage of the bearing support, the length of the primary channel 60 is preferably minimal.
    [0020] By using drilling, it is thus not necessary to modify the foundry molds. According to an embodiment shown in FIG. 6, the primary channel 60 may comprise a second channel portion 63 that is fluidly parallel to that mentioned above. The two channel portions 61, 63 open into the cavity C and are then spaced a distance smaller than the diameter of the duct 62, in order to also open into the duct 62. As shown in FIG. 6, the communication 3037533 14 made by intersection of several cylinders corresponding to the portions 61, 63 and 62 leads. In the case shown in Figure 6, the two portions 61, 63 are geometrically parallel. Having two channel portions 61, 63 makes it possible to reduce their diameter compared to a single portion 61, for a constant air flow. The bearing support 10 is a part subjected to strong stresses (it bears in particular the weight of the vehicle) and it may be desirable to minimize the volume of each recess. Alternatively, it is possible to provide a conduit 62 for each respective portions 61, 63, but it is then necessary to provide a duplication of the pipe 4, which complicates the realization of the system and increases the amount of material to be hollowed out. Nevertheless, having two channel portions 61, 63 makes it possible to limit the recess of material radially. This allows for a stronger or finer bearing support piece 10 to pass the necessary airflow. The Secondary Channel Several embodiments of the secondary channel will now be described. An attachment zone 23 is defined on the end 21 forming a hub (see FIG. 1). This zone corresponds to a radial plane area (relative to the longitudinal axis X) of the hub on which the rim 2a is secured. Generally, it accommodates a set of 25 bolts 24 regularly distributed in a ring traversed at its center by the longitudinal axis X. As shown in Figure 2 for example, the secondary channel 70 can be in the form of a rectilinear channel s extending longitudinally 30 or substantially longitudinally along the longitudinal axis X. By the architecture of the end 21 forming a hub and the attachment zone 23 which is radially further away than the chamber C, the outlet orifice 70a The channel 70 is located radially between the longitudinal axis X and the attachment zone 23. As shown in FIGS. 7 and 8, the secondary channel 70 can be in the form of a rectilinear channel extending obliquely and radially diverging. relative to the longitudinal axis X to open at the attachment zone 23, that is to say that the outlet orifice 70a is in this zone 23. A recess 25 is formed in the fixing zone. 23 to allow the outlet port 70a to be in the extension of the rectilinear channel 70 without being in the planar area of the attachment zone 23. By "bias" is meant that in a plane of section comprising the longitudinal axis X, the channel extends at an angle of between 10 and 80 °, and more precisely between 30 and 60 °.
    [0021] Alternatively, as shown in FIGS. 9, 10 and 11, 12, the secondary channel 70 may comprise a first portion 71 extending longitudinally from the attachment zone 23. The outlet orifice 70a is in the radial planar zone of the The secondary channel 70 also includes a second portion 72 which connects the first portion 71 to the chamber C. For design reasons, the second portion 72 passes through the hub end 21 to the chamber C, joining the first portion 71 in said hub end 21. An inner radial end of said portion 72 thus opens into the chamber C and an outer radial end of said portion 72 opens on an outer radial surface of the end 11 forming a hub, said second portion 72 being intersecting with the first portion 71. Indeed, the portions are preferably made by drilling, not by foundry molding. The portions are preferably rectilinear. The second portion 72 may be biased relative to the longitudinal extension X or orthogonal. A plug 73 is provided at the outer radial end of the second portion 72 to seal the secondary channel 70 and allow the compressed air from the chamber C to join the outlet port 70a. The primary and secondary channels are preferably never aligned, so as to avoid a direct circulation of air and maintain a buffer role of the cavity C, to possibly absorb transient overpressures. In this way, when the channel portion 61 and the secondary channel 70 extend rectilinearly parallel to the longitudinal axis X, they are arranged at different radial distances.
    [0022] Other elements In order to protect the chamber seal 50, a protective seal 80 may be provided. When positioned, the chamber seal 50 is located between the chamber C and the seal 80 which prevents water, dust, etc. to come into contact with said chamber seal 50. More precisely, according to one embodiment, the protective seal 80 is positioned radially between the bearing support 10 and the longitudinal extension 22 to protect the chamber seal 50 (FIG. 2) .
    [0023] This is typically a lip seal, already used in bearings to protect them from the outside environment. The protective seal 80 is fixed. In addition, a sheet metal gasket 81 is positioned radially outwardly on the bearing support 10 and extends toward the extension 22 to partially cover it without touching it. This sheet 81 makes it possible to protect the direct shine protection seal.
    [0024] It is possible that the seals 40, 50 show some leakage, favored when the compressed air supply means 5 malfunction and cause overpressures in the chamber C. The seals could then jump from their housing or tear, 3037533 17 thus to pass dirt in the fat. In particular, if the inter-rolling joint 36 is damaged, there would be a risk of grease leakage to the crankcase of the engine lubricated with oil. Indeed, the inter-rolling joint 36 is in fluid communication with the volume between the rolling joint 40 and the first bearing set 30. To remedy this, a device is provided to allow atmospheric pressure to be put on the volumes around it joints 40, 50, as well as the volume around the bearings 30, 35. As shown in FIGS. 11, 12 a first bore 82 may be provided in the longitudinal extension 22. This bore 82, from a surface external to the end 21 forming a hub opens between the chamber seal 50 and the protective seal 80. A second bore 83 may be provided in the end 11 of the bearing support 10, and, if appropriate the seal holder 44 of the fret type, in order to open into the region around the bearings 30. A fluid communication 82, 83 is then provided between this region and the outside which is at atmospheric pressure, via the two holes 82, 83. discharge chamber which allows the evacuation of the overpressures of the chamber C. The drilling 83 in the bearing support 10 and in the hoop 44 is not necessarily rectilinear, that is to say that there can be an offset, for example if there is a volume in the form of a circular groove, or groove, between the band 44 and the bearing support 10. Said groove can be made in the band or in the bearing support 10. Of a In known manner, this groove communicates the drilling in the end 11 of the bearing support 10 and the drilling in the band 44, even if they are not face to face radially, and to a lesser extent axially. A valve 84, which serves as a check valve, closes the first bore 82 to both allow the evacuation of overpressures but also prevent dirt from entering through the first bore 82. The valve 84 is pressure calibrated. desired. In particular, the calibration of the valve 84 is sufficiently small so that the pressure of the joints, in particular the inter-rolling seal 36, is not reached. To avoid interference with the portion 61 of the primary channel 60, the second bore 83 is made in another plane than the latter, so that there is no fluid communication between the primary channel 60 and the second 83. Figure 11 shows a sectional view in the plane of the primary channel 60, therefore, the second hole 83 is not visible. FIG. 12 represents a sectional view of the bearing support 10 in the plane of drilling 83.
    [0025] The means for supplying compressed air They can take several forms. In particular, these means 5 can be made with: a compressor sized to provide the air flow and the pressure necessary for inflating a tire 2b carried by the rim 2a. It is generally powered by a heat engine (not shown in the figures), - a compressed air tank.
    [0026] Such equipment for supplying compressed air is very common on wheeled machines and vehicles. They can be used in a known manner to vary the pressure of the tires depending on the nature of the ground, or a vehicle height. They may be dedicated to inflating the wheels, or shared with other pneumatic equipment, such as an airbag suspension system. They can be mechanically linked to the main engine of the machine or the vehicle, or be trained by means of a dedicated machine. This dedicated machine can be advantageously electric, and powered by the electrical network of the machine or the vehicle, and be controlled by a control unit. The pipe 4 makes it possible to transfer the compressed air to the inlet orifice 60a of the primary channel 60.
    [0027] The pipe 4 is preferably flexible since the bearing supports 10 can be part of a directional wheel (typically the front wheels of a vehicle), or a wheel movable relative to the chassis, by means of a suspension system. .
    [0028] The hydraulic machine With reference to FIG. 13, the hydraulic machine 3 is preferably a radial piston machine 90 comprising: a lobed cam 91, in particular a multilobe cam, a plurality of piston 92 arranged radially in a cylinder block , the pistons 92 each comprising a roller 94 which can roll on the lobed cam 91, - a machine shaft 95, which can be integral with the cylinder block 93 93 This type of machine can be activated or deactivated by retracting the pistons 92 in the block 93, or by clutching or disengaging the block 93 relative to the machine shaft 95. Such a machine converts hydraulic energy into mechanical energy by varying the displacement of the pistons as they roll on the lobed cam. Such a machine, if of multilobe cam type, has relatively low rotational speeds but has high torque. This machine is running at wheel speed.
    [0029] A housing (not shown) and a cover protect the assembly. In a known manner, the housing comprises oil normally without pressure. The housing ensures the collection of leaks from the machine, and this flow of oil ensures the lubrication and cooling of the machine. However, the crankcase can be set to low pressure to retract the 30 pistons and disable the machine. The machine is connected to a feed line, a return line, and a crankcase drain line. The machine may be of the type where the bearings are in the grease, or of the type where one bearing is in the grease, and the other in the oil, 3037533 or of the type where the two bearings are in the grease. If one of the bearings is in the grease, the machine has an isolation seal between grease and oil.
    [0030] In particular, the machine shaft 95 may be integral in rotation with the shaft 20 or, as is the case in the figures, form a single piece with the shaft 20. The bearing supports 10 are typically integral with the housing and / or cover.
    [0031] A gear reducer can be placed between the block and the output shaft. In this case the hydraulic machine is preferably a hydraulic machine called fast axial piston, or a radial piston machine and cam with a single lobe. In this case the machine rotates faster than the wheels. Now, an assembly method will be described (Figure 14). In a first step of fitting the bearing, the bearing support 20 is equipped with the running track 31 integral with the bearing support 10. This track 31 can be held in place by the seal holder 44 of the hoop type. In a second step of fitting the bearing, the metal seal 81 and the protective seal 80 are placed, as well as the inter-rolling seal 36. In a step of equipping the shaft 20: 40 is positioned on the shaft 20, with or without the seal support 44 and / or the wedge support 45, the chamber seal 50 is placed on the end 21 forming the hub, the running track 32 is the shaft 20 is driven on the shaft 303 75 3 3 21 - the bearings 30 and the cage 33 are placed on the shaft. Then, the bearing support 10 is placed on the shaft 20 thus equipped. The tracks of the second bearing set 35 can then be put in place. Finally, in a next step, a wedge 37 and an elastic ring 38 are placed in an annular groove extending on a periphery of the shaft (not shown) outside the bearings 30, 35. When the hydraulic machine 3 is put in place, the wedge 37 and the elastic ring 38 lie longitudinally between the machine 3 and the bearings 30, 35. The holding of the machine shaft 95, or of the shaft 20 according to the embodiments in the hydraulic machine 3 is thus improved.
    [0032] When the shaft 20 includes longitudinal splines ("spline shaft") for providing torque transmission between the cylinder block 93 and the shaft 20, 90, the groove is machined transversely to these splines. 20
    权利要求:
    Claims (16)
    [0001]
    REVENDICATIONS1. A system for pneumatic wheel supply comprising: a bearing support (10); - a shaft (20) extending along a longitudinal axis (X) within the bearing support (10) and having an end (21) forming a hub which extends radially (Y), the shaft being configured to be rotated by a hydraulic machine, - at least one bearing bearing set (30) disposed between the bearing support (10) and the shaft (20) for rotation of said shaft in the bearing support about the longitudinal axis, characterized in that the system further comprises: - a chamber (C) formed by the end (21) forming a hub, the support bearing (10), a bearing seal (40) and a chamber seal (50), - A primary channel (60) passing through the bearing support (10) and opening into the chamber (C), - A secondary channel (70) passing through the end (21) forming a hub and opening into the chamber (C), wherein: - the rolling joint (40), arranged longitudinally between the bearing bearing clearance (30) and the chamber (C), is in contact with the bearing support (10) and the shaft (20) for sealing between the shaft (20) configured for being movable in rotation and the bearing support (10) configured to be fixed, - the chamber seal (50) is in contact with the bearing support (10) and the end (21) forming a hub to ensure sealing between the hub end (21) configured to be rotatable and the bearing support (10) configured to be stationary.
    [0002]
    2. System according to claim 1, wherein the end (21) forming a hub comprises a longitudinal extension (22) which faces a end (11) of the bearing support (10), said end (11) of the bearing support (10) thus being radially located between the shaft (10) and the longitudinal extension (22). 5
    [0003]
    3. System according to claim 2, wherein the chamber seal (50) is positioned radially between the end (11) of the bearing support (10) and the longitudinal extension (22).
    [0004]
    4. System according to claim 2 or 3, wherein the rolling seal (40) and the chamber seal (50) are located in the same radial plane.
    [0005]
    5. System according to any one of claims 1 to 4, wherein the primary channel (60) comprises a rectilinear channel portion (61) extending longitudinally in the end (11) of the bearing support (10). and opening into the chamber (C).
    [0006]
    The system of claim 5 including a second channel portion (63) extending parallel to the channel portion (61) so as to have portions with smaller cross sections.
    [0007]
    7. System according to any one of the preceding claims, wherein the secondary channel (70) passes longitudinally in the end (21) forming a hub.
    [0008]
    A system according to any one of the preceding claims, wherein the hub end (21) comprises an attachment zone (23) and the secondary channel (70) connects the chamber (C) to said attachment zone (23). ).
    [0009]
    9. System according to the preceding claim, wherein the secondary channel (70) opens into the attachment zone (23) forming an angle of between 30 and 60 ° relative to the longitudinal axis (X). 25 30 3037533 24
    [0010]
    10. System according to the preceding claim, wherein the secondary channel (70) comprises a first portion (71) extending longitudinally from the attachment zone (23) and a second portion (72) connecting the chamber (C) to the first portion (71).
    [0011]
    The system of any preceding claim in combination with claim 2, further comprising a protective seal (80) positioned radially between the bearing support (10) and the longitudinal extension (22) to protect the chamber seal (50), said chamber seal (50) thus being located longitudinally between the chamber (C) and the protective seal (80).
    [0012]
    The system of any preceding claim, wherein a bearing bearing (30) is lubricated with grease.
    [0013]
    13. An assembly comprising: - a system (1) according to any one of the preceding claims, - means for supplying compressed air (5) with a pipe (4), for supplying compressed air, - a rim (2), wherein: - the rim (2) is integral with the end (21) forming hub, 25 - the pipe (4) supplies the first channel (60) with compressed air, - the rim (2) is supplied with air by the second channel (70) via the chamber (C).
    [0014]
    A vehicle comprising an assembly according to the preceding claim.
    [0015]
    15. The method of assembling a system according to claim 1, comprising steps of: 20), - installing the bearing support (10) and the shaft (20), - assembling the bearing support (10) and the shaft (20). 5
    [0016]
    16. The method of claim 15, wherein: the step of equipping the bearing support comprises the establishment of a raceway (31), a metal seal (81), a seal protection device (80), 10 - the step of equipping the shaft comprises placing a chamber seal (50) and a bearing seal (40), setting up a rolling track (32) and the corresponding bearing (30), - the step of assembling the bearing support (10) and the shaft (20) comprises placing a wedge (37) and an elastic ring (38).
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    同族专利:
    公开号 | 公开日
    EP3106325B1|2018-03-14|
    FR3037533B1|2017-06-30|
    US10675923B2|2020-06-09|
    EP3106325A1|2016-12-21|
    US20160368329A1|2016-12-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2465602A1|1979-09-18|1981-03-27|Bennes Marrel|Heavy vehicle tyre inflation and deflation circuit - has air conduits to each tyre with non-return valve controlled from cab|
    FR2673684A1|1991-03-04|1992-09-11|Poclain Hydraulics Sa|ASSEMBLY OF A MULTI-CYLINDER PRESSURIZED FLUID ENGINE AND ASSOCIATED BRAKE.|
    FR2895470A1|2005-12-28|2007-06-29|Snr Roulements Sa|Anti-friction bearing for motor vehicle, has fixed channel with downstream end emerging in lateral space, and rotating channel with upstream end emerging in space for realizing air passage between air passage module and rotating unit|
    GB2477816A|2010-02-12|2011-08-17|Supacat Ltd|Central tyre inflation systems|
    EP2803506A1|2013-05-15|2014-11-19|Meritor Technology, LLC|A system for changing tyre pressure|WO2019002781A1|2017-06-30|2019-01-03|Poclain Hydraulics Industrie|Imrpoved hyrualic device comprising an air flow line|
    WO2019002774A1|2017-06-30|2019-01-03|Poclain Hydraulics Industrie|Improved steering pivot pin forming an internal pneumatic passage|US5203391A|1991-03-15|1993-04-20|The Timken Company|Wheel mounting for tire pressure adjustment system|
    US6325123B1|1999-12-23|2001-12-04|Dana Corporation|Tire inflation system for a steering knuckle wheel end|
    US6776261B2|2002-05-29|2004-08-17|Garlock Sealing Technologies Llc|Lubricant monitoring system|
    US8915274B2|2009-01-22|2014-12-23|Arvinmeritor Technology, Llc|Spindle for controlling wheel end endplay and preload|FR3110631A1|2020-05-25|2021-11-26|Poclain Hydraulics Industrie|Improved lubrication for sealing rotating machines.|
    法律状态:
    2016-06-13| PLFP| Fee payment|Year of fee payment: 2 |
    2016-12-23| PLSC| Search report ready|Effective date: 20161223 |
    2017-06-15| PLFP| Fee payment|Year of fee payment: 3 |
    2018-06-13| PLFP| Fee payment|Year of fee payment: 4 |
    2020-05-29| PLFP| Fee payment|Year of fee payment: 6 |
    2021-05-27| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1555500A|FR3037533B1|2015-06-16|2015-06-16|PNEUMATIC SYSTEM FOR INTEGRATED WHEEL INFLATION WITH A MOTORIZED AXLE|FR1555500A| FR3037533B1|2015-06-16|2015-06-16|PNEUMATIC SYSTEM FOR INTEGRATED WHEEL INFLATION WITH A MOTORIZED AXLE|
    EP16174637.5A| EP3106325B1|2015-06-16|2016-06-15|Pneumatic system for tyre inflation built into a motorised axle|
    US15/183,698| US10675923B2|2015-06-16|2016-06-15|Pneumatic system for inflating a wheel, integrated to a driven axle|
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