• 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 pump device (22) for a power take-off (16) of a vehicle (1), comprising a fluid inlet (32); a id outlet (34); a rotor (40) connected to the fluid inlet (32) and the fluid outlet (34), which is arranged on a drive element (20); a stator (42) cooperating with the rotor (40), which is arranged in a housing (18). A displaceable and reshapable switching element (54), which in a first position cooperates with the rotor (40) and the stator (42), so that substantially no flow is generated by the pumping device (22), and in a second position abuts the stator (42) and the rotor (40) so that a feed is generated through the pump device (22). The invention also relates to a power take-off (16) for a socket module (14), a socket module (14) and a vehicle (1), which comprises a power take-off (16). (Fig. 2)
    公开号:SE1351067A1
    申请号:SE1351067
    申请日:2013-09-18
    公开日:2015-03-19
    发明作者:Johan Träff
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    1 Pump device for a power take-off, power take-off for a socket module, socket module and a vehicle that includes a power take-off.
    BACKGROUND OF THE INVENTION AND PRIOR ART The present invention relates to a pump device for a power take-off according to the preamble of claim 1, a power take-off for a socket module according to the preamble of claim 8, an outlet module according to the preamble of claim 11 and a vehicle comprising a power take-off according to the preamble of claim 13. .
    It happens that trucks are equipped with superstructures of various kinds. These buildings can, for example, consist of cranes and compressors. To power the buildings, power is extracted from the truck's driveline with the help of one or more power take-offs. A common name for these power take-offs is PTO, which is an abbreviation of the English Power Take Off. The power take-offs can be connected to and mounted on virtually all components of the driveline, for example on the engine, on the gearbox or between the engine and the gearbox. To drive a superstructure in the form of a crane with hydraulic cylinders, pressurized hydraulic oil is needed, for which purpose a socket module in the form of a hydraulic pump is mounted in the power take-off. If the superstructure is a compressor, a socket module in the form of a connection flange in the power take-off is preferably mounted, to which the input shaft of the compressor flange of the compressor is connected.
    A power take-off can be single or double and be direct or shifted. The direct PTOs are driven directly by the vehicle's driveline and they shifted via a transmission to shift up the speed. The dual power take-offs include a built-in transmission, which distributes the power to two sockets for connecting socket modules.
    The mobile components of the power take-offs and take-out modules depend on lubrication to function satisfactorily. Different types of lubrication systems for power take-offs and modules are available. One type of lubrication system that occurs is stench lubrication where the lubricating oil, which is trapped in the housing for the respective power take-off and outlet module, is circulated with the aid of the components movable in the power take-off and the outlet module. In stench lubrication, the lubrication effect is limited by the rotational speed of the movable components, which means that pressure-lubricated bearings cannot be used in the power take-off and the take-out module. In another type of lubrication system, the internal lubrication system of the gearbox is used, whereby transmission oil is pressurized in the gearbox and is led to the power take-off and the outlet module. The disadvantage, however, is that the lubricating oil flow and the lubricating oil pressure decrease in the components to be lubricated in the gearbox, since part of the flow and the pressure are distributed to the power take-off and the take-out module.
    There are power take-offs that contain a separate lubrication system with a pump device, which supplies the power take-off and the outlet module with lubricating oil flow and lubricating oil pressure.
    The document US5092736 shows a pump device for a power take-off, which pump device is arranged on a drive shaft for the power take-off. Such a separate pump device for the power take-off and the take-out module requires overford energy from the drive shaft, which entails an increased fuel consumption of a vehicle on which the power take-off is mounted.
    In the event that the vehicle is equipped with such a power take-off, but no outlet module is mounted on the power take-off, fuel will be consumed unnecessarily, since the pump device is driven and energy is required to pump lubricating oil with the pump device.
    SUMMARY OF THE INVENTION Despite known solutions, there is a need to further develop a pump device for a power take-off, which saves fuel, which does not affect ordinary oil systems in a vehicle driveline, which allows the use of pressure lubricated bearings, and which allows forced oil cooling of the power take-off.
    The object of the present invention is thus to provide a pump device for a power take-off, which saves fuel when the power take-off is not used.
    A further object of the invention is to provide a pump device for a power take-off which does not affect ordinary oil systems in a vehicle driveline.
    Another object of the invention is to provide a pump device for a power take-off, which enables the use of pressure-lubricated bearings in the power take-off and in a take-off module which is connected to the power take-off. Another object of the invention is to provide a pump device for a power take-off, which allows forced oil cooling of the power take-off.
    These objects are achieved with a pump device for a power take-off of the kind mentioned in the introduction, which can be characterized by the features stated in claim 1.
    Such a pumping device for a power take-off will save fuel, not affect ordinary oil systems in a vehicle driveline, allow the use of pressure-lubricated bearings and allow forced oil cooling of the power take-off, as the oil transports away heat generated in the power take-off.
    According to one embodiment, the switching element is axially displaceable. This allows the switching element to be easily switched between the first and second layers.
    According to a further embodiment, the switching element is a disc spring, which in the first layer assumes a cupped shape and in the second layer assumes a substantially flat shape. A disc spring has a simple construction whose pre-change between the first and second layers is used.
    According to another embodiment, the disc spring is arranged to be broken to the second layer by overcoming the spring force of the disc spring. The spring force of the disc spring can easily be adapted to the intended breathing needle through the choice of material and shape.
    According to another embodiment, the housing forms a power take-off for a socket module. The shape of the housing can thus be adapted to cooperate with the shape of the socket module.
    According to another embodiment, the drive element is a shaft extending from a gearbox. By arranging the power take-off at the gearbox, a component rotating in the gearbox can be used for coupling a shaft for operation of a socket module connected to the power take-off. According to another embodiment, the drive element comprises a coupling sleeve for connecting a coupling shaft of a socket module. The coupling sleeve can easily be designed so that it assumes a shape fitting and cooperating with the socket module.
    The objects stated above are also achieved with a power take-off of the kind mentioned in the introduction, which can be characterized by the features stated in claim 8.
    According to one embodiment, the housing comprises axially directed bores, which are partly designed to receive a control means for the switching element, and partly to form channels for fluid flow. By designing the housing with axially directed bores, control means arranged on the socket module can influence the switching element, so that it is switched between the first and second layers. The bores that do not receive a guide means will act as an inlet and outlet for fluid between the power take-off and the take-out module.
    According to a further embodiment, the drive element comprises a coupling sleeve for connecting a coupling shaft of the socket module. This allows the coupling sleeve to be easily shaped so that it assumes a shape that fits and fits the socket module.
    The above objects are also achieved with a socket module of the kind mentioned in the introduction, which can be characterized by the features stated in claim 11.
    According to one embodiment, the guide element is a pin which extends substantially parallel to a coupling shaft of the power take-off. This allows the switching element to be easily switched between the first and second layers when the socket module is removed from or mounted on the power take-off.
    The above objects are also achieved with a vehicle of the kind mentioned in the introduction, which can be characterized by the features stated in claim 13.
    Further advantages of the invention will become apparent from the following detailed description.
    BRIEF DESCRIPTION OF THE DRAWINGS In the following, as an example, preferred embodiments of the invention are described with reference to the accompanying drawings, in which: Fig. 1 shows in a side view a schematically shown vehicle with a pump device for a power take-off according to the present invention; Fig. 2 shows a cross-sectional view of a diagrammatically shown power take-off with the pump device according to the present invention, Fig. 3 shows a plan view of the power take-off according to the present invention, Fig. 4 shows a cross-sectional view along the line I-I in Fig. 2, and Fig. 5 shows a cross-sectional view of a schematically shown power take-off with the pump device according to the present invention with a connected take-off nodule.
    DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION Fig. 1 shows a schematic side view of a vehicle 1, which comprises a driveline 2 with an internal combustion engine 4, which is connected to a gearbox 6. The gearbox 6 is further coupled to the drive wheel 8 of the vehicle 1 The vehicle 1 is provided with a crane 10 in which a hydraulic cylinder 12 is arranged. An outlet module 14 in the form of a hydraulic pump is arranged to drive the hydraulic cylinder 12 and thus the crane 10. The hydraulic pump 14 is connected to a power take-off 16, which is arranged at the driveline 2 of the vehicle 1. The hydraulic pump 14 is connected to the hydraulic cylinder 12 via hydraulic lines. The power take-off 16 comprises a pump device 22 according to the present invention.
    Fig. 2 shows a schematic sectional view of a power take-off 16 according to the present invention. The power take-off 16 comprises a housing 18, which at least partially houses a drive element 20 in the form of a Than drive line 2 output shaft 20, a coupling sleeve 24, which is connected to the output shaft 20 and a first bearing 26, which stores the coupling sleeve 24. in the housing 18. The housing 18 is designed to form a socket for the socket module 14. The power socket 16 also comprises the pump device 22, which is driven by the output shaft 20. The output shaft 20 is intended to be connected to the driveline 2 of the vehicle 1 (Fig. 1). ), so that the driveline 2 drives and causes the pump device 22 to pump fluid, for example transmission oil from the gearbox 6. In the event that the power take-off 16 is arranged at the gearbox 6 of the vehicle 1, the output shaft 20 is coupled to a shaft rotatable (not shown) ). The output shaft 20 is mounted in the gearbox 6 by means of a second bearing 28. The coupling sleeve 24 comprises means, for example a spline connection 30 for coupling to the output shaft 20 and for connecting the socket module 14.
    The pump device 22 comprises a fluid inlet 32 and a fluid outlet 34. To the fluid inlet 32 is connected a hose or pipe 36, which leads the transmission oil Than the gearbox 6. A lid 39 abuts against one side of the pump device 22 through which the hose or pipe 36 extends and is connected. Preferably, the power take-off 16 is connected to the gearbox 6 by means of fixed bolts 38. In the pump device 22, the fluid inlet 32 and the fluid outlet 34 are connected to a rotor 40, which is arranged on the coupling sleeve 24. It is also possible to arrange the rotor 40 directly on the output shaft 20. The pump device 22 also comprises a stator 42 cooperating with the rotor 40, which is arranged in the housing 18 so that it is not rotatable. Preferably, the pump device 22 is formed as a crescent pump, which means that it comprises a driver 44, which is driven by the rotor 40. The rotor 40 comprises circumferentially arranged teeth 46, which are directed radially outwards and which upon rotation of the rotor 40 cooperate with radial food. directed teeth 48 of the driver 44. The stator 42 has an eccentric opening 52 in relation to the center axis 50 of the rotor 40, which encloses the driver 44. Thereby the driver 44 will rotate eccentrically around the rotor 40, which creates a pumping effect when the teeth of the rotor 40 and the driver 44 interact with each other. The eccentric location of the driver 44 also forms the fluid inlet 32 and fluid outlet 34 of the pump device 22.
    The pump device 22 also comprises an axially displaceable and reshapable switching element 54, which in a first layer cooperates with the rotor 40 and the stator 42, so that substantially no fluid flow is generated by the pump device 22, and in a second layer abuts the stator 42 and the rotor 40, so that a fluid flow is generated through the pump device 22. Preferably, the switching element 54 is a disc spring, which in the first layer assumes a cupped shape and in the second layer assumes a substantially flat shape. Figure 2 shows how the switching element 54 is placed in the first layer as no fluid flow or fluid pressure will be built up by the pump device 22.
    The reason why no flow and pressure builds up in the first layer is that the cooperating teeth 46, 48 of the rotor 40 and the carrier 44 cannot create a defined volume when the side of the pump device 22 facing the switching element 54 is open. The teeth 46, 48 cooperating with the rotor 40 and the carrier 44 will thus move in the volume of transmission oil present at the pump device 22 without generating a flow or pressure through the fluid outlet 34. Thereby no energy is required in the form of pump work of the pump device 22, which in turn means that very little overford energy is required Than the output shaft 20. This results in a reduced fuel consumption of the vehicle 1 when no socket module 14 is mounted on the power take-off 16.
    The housing 18 includes axially directed bores 56 which form channels for fluid flow both to and from the outlet module 14 which is intended to be connected to the power take-off 16. Bores 56 are also designed to receive a guide element 58 (see Figure 5) for the switching element 54, which will be explained in more detail below. The bores 56 are connected to grooves 60 formed in the housing 18.
    Fig. 3 shows a plan view of the power take-off 16. It can be seen how a plurality of bores 56 are arranged in the circumferential direction of the housing 18. The figure shows four bores 56, but less or more than four bores 56 can be provided in the housing 18. Preferably, the spirit of the housing 18 is provided from the gearbox 6 (Fig. 2) with a fixed flange (not shown) to secure the socket module 14 ( Fig. 1).
    Fig. 4 shows a cross-sectional view along the line I-I in Fig. 2. It can be seen that the pump device 22 comprises a rotor 40, a stator 42 and a driver 44 and that the pump device 22 is constructed as a crescent pump. It should be mentioned in this context that the pump device 22 could comprise another type of pump, for example a gerotor or a gear pump. Fig. 5 relates to a cross-sectional view of the power take-off 16 with a connected socket module 14. The socket module 14 comprises a coupling shaft 66, which is connected to the coupling sleeve 24 by means of the spline connection 30. The socket module 14 comprises a control element 58 for the switching element 54. , which extends substantially parallel to the coupling axis of the socket module 14. When the socket module 14 is mounted on the power take-off 16, one or more pins 58 are inserted in the bores 56. The pins 58 will then come into contact with and axially displace a ring 62, which abuts against the disc spring 54. The ring 62 has such a shape that it partially extends into the recesses 60 inside the housing 18, which recesses 60 cooperate with the bores 56. When the ring 62 is displaced axially, the disc spring 54 will be pressed against the side of the pump device 22 and reshaped so that the disc spring 54 assumes a substantially planar shape. The disc spring 54 is thus forced to the second layer by overcoming the spring force of the disc spring 54. Thereby, the disc spring 54 will abut against one side of the pump device 22, which means that a flow and pressure of the transmission oil can be formed. Transmission oil is then sucked up from the gearbox 6 by the pump device 22 through the hose or conduit 36 and further through the pump inlet fluid inlet 32. Thereafter, the transmission oil is forced out through the fluid outlet 34 of the pump device 22 and passed through an opening formed between the disc spring 54 and the coupling sleeve 24 and a ring between the ring and the coupling sleeve. 24 formed opening. Finally, the transmission oil is passed on to the recess 60 and the bores 56 in the housing 18 and into the outlet module 14. The transmittance of the transmission oil is shown by arrows in Fig. 5. The ring 62 and the lid 39 are held in place by a respective sparring 64, so that the lid 39 is fixed in the axial direction and the axial displacement of the ring 62 is limited. The construction of the pump device 22 and the interaction of the spar rings 64, the ring 62 and the lid 39 with the pump device 22 Or that it becomes very easy to mount in the housing 18 and also easy to disassemble during maintenance or replacement.
    The stated components and features stated above can be combined within the scope of the invention between different specified embodiments. 9
    权利要求:
    Claims (13)
    [1]
    A fluid outlet (34); A rotor (40) connected to the fluid inlet (32) and the fluid outlet (34), which is arranged on a drive element (20); A stator (42) cooperating with the rotor (40), which is arranged in a housing (18); can be characterized by 4. a displaceable and reshapable switching element (54), which in a first layer cooperates with the rotor (40) and the stator (42), so that substantially no fluid flow is generated by the pump device (22), and in a second layer abuts against the stator (42) and the rotor (40), so that a fluid flow is generated through the pump device (22).
    [2]
    Pump device according to Claim 1, characterized in that the switching element (54) is axially displaceable.
    [3]
    Pump device according to any one of claims 1-2, characterized in that the switching element (54) is a disc spring (54), which in the first layer assumes a cupped shape and in the second layer assumes a substantially flat shape.
    [4]
    Pump device according to claim 3, characterized in that the disc spring (54) is arranged to be conveyed to the second layer by overcoming the spring force of the disc spring (54).
    [5]
    Pump device according to one of the preceding claims, characterized in that the housing (18) forms a power take-off (16) for a socket module (14).
    [6]
    Pump device according to one of the preceding claims, characterized in that the drive element (20) is a shaft (20) emanating from a gearbox (6).
    [7]
    Pump device according to one of the preceding claims, characterized in that the drive element (20) comprises a coupling sleeve (24) for connecting a coupling shaft (66) of a socket module (14).
    [8]
    Power take-off for a socket module (14), characterized in that the power take-off (16) comprises a pump device (22) according to any one of claims 1-7.
    [9]
    Power take-off according to claim 8, characterized in that the housing (18) comprises axially directed bores (56), which are partly designed to receive a control element (58) for the switching element (54), and partly to form channels for fluid flow.
    [10]
    Power take-off according to claim 8, characterized in that the drive element (20) comprises a coupling sleeve (24) for connecting a coupling shaft (66) of the socket module (14).
    [11]
    Outlet module, characterized in that it comprises a control element (58) for a switching element (54) to a pump device (22) of a power take-off (16) according to any one of claims 8-10.
    [12]
    Socket module according to claim 11, characterized in that the guide element (58) is a pin son extending substantially parallel down a coupling axis (66) of the socket module (14).
    [13]
    Vehicle, characterized in that it comprises a power take-off (16) according to any one of claims 8 -10. I. 6 td 2/4 16 38 52 391 18 64 60 26 24 PF --- 28 36 56 62 2246 48
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    同族专利:
    公开号 | 公开日
    SE537481C2|2015-05-12|
    DE112014003790T5|2016-05-19|
    DE112014003790B4|2019-02-07|
    WO2015041587A1|2015-03-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    YU177488A|1987-11-17|1990-12-31|Zahnradfabrik Friedrichshafen|Placing of a pump in an transporter|
    US5228355A|1991-11-15|1993-07-20|Dana Corporation|Pto unit for a transmission or the like including a lubrication system operable only when the pto is in operation|
    JP2000161248A|1998-12-01|2000-06-13|Kayaba Ind Co Ltd|Hydraulic pump device|
    DE10025723A1|2000-05-25|2001-11-29|Gkn Sinter Metals Gmbh|Regulated pump|
    GB2417049B|2004-08-10|2009-07-01|Gilbert Gilkes & Gordon Ltd|Improvements in or relating to self-priming pumps|
    ES2576054T3|2010-06-24|2016-07-05|Volvo Lastvagnar Ab|Transmission with a main gearbox and a power take-off unit|CN105351505A|2015-11-19|2016-02-24|陕西法士特汽车传动集团有限责任公司|Transmission lubricating system with through shaft power takeoff|
    法律状态:
    2021-10-12| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1351067A|SE537481C2|2013-09-18|2013-09-18|Pump device for a power take-off, power take-off for a take-off module, take-off module and a vehicle comprising a power take-off|SE1351067A| SE537481C2|2013-09-18|2013-09-18|Pump device for a power take-off, power take-off for a take-off module, take-off module and a vehicle comprising a power take-off|
    PCT/SE2014/051046| WO2015041587A1|2013-09-18|2014-09-11|Pump unit for a power take-off, power take-off for a take-off module, take-off unit and a vehicle including a power take-off|
    DE112014003790.7T| DE112014003790B4|2013-09-18|2014-09-11|Pump unit for a PTO, PTO for a PTO module and a vehicle with a PTO|
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