• 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:
    A telescopic shaft (2) for motor vehicles (1) is described. The telescopic shaft (2) comprises an inner shaft (3), an outer shaft (5), which defines a tube and encloses a part of the inner shaft (3) and which is movable in axial direction relative to the inner shaft (3), two ball paths (8, 9) arranged in the inner axis (3), and balls (10) arranged in the ball paths (8, 9). Each of the ball tracks (8, 9) comprises an outer ball track portion (11) which is partially open so that the balls (10) arranged in the outer ball track portion (11) are arranged to roll between the outer ball track portion (ll) and the inside of the outer shaft (5). The telescopic shaft (2) comprises at least one movable ball track member (12) which forms at least a part of the outer ball track portion (11) and a spring member (13) which is arranged between the inner shaft (3) and the movable ball track member (12), which spring means (13) are arranged to press the movable ball path means (12) and the balls (10) arranged in the ball path means against the inside of the outer shaft (5), so as to bias the telescopic shaft (2). Fig. 3
    公开号:SE1050436A1
    申请号:SE1050436
    申请日:2010-05-03
    公开日:2011-11-04
    发明作者:Hans Fredriksson
    申请人:Fuji Autotech Ab；
    IPC主号:
    专利说明:

    U.S. Pat. No. 3,995,916 discloses a ball telescope with circulating balls between the inner and outer shafts where the balls always roll. A similar cult telescope is described in EP 0 518 091 Bl. A problem with the cult telescope according to said writings, however, is that careful tolerances of the dimensions of the axles are required to avoid play. In addition, it is difficult to avoid that play still occurs over time due to wear and tear of the components, despite the fact that the cult telescope was manufactured with high tolerances from the beginning.
    SUMMARY OF THE INVENTION An object of the present invention is to provide a telescopic shaft adapted to be arranged between the steering wheel and the steering gear of a motor vehicle, to accommodate movements which may occur between the steering wheel and the steering gear, and a motor vehicle having such a telescopic shaft. , which telescopic shaft solves at least one of the problems with telescopic shafts according to prior art.
    A further object of the present invention is to provide a telescopic shaft which is adapted to be arranged between the steering wheel and the steering gear in a motor vehicle, to accommodate movements which may occur between the steering wheel and the steering gear, and a motor vehicle with such a telescopic shaft, which telescopic shaft enables long stroke without requiring high tolerances on the components over long distances while avoiding play in the telescopic shaft. At least one of these objects is fulfilled with a telescopic axle and a motor vehicle according to the independent claims.
    Further advantages of the invention are obtained with the features of the dependent claims.
    According to a first aspect of the present invention there is provided a telescopic shaft for motor vehicles, which comprises an inner shaft having a longitudinal axis, an outer shaft having a longitudinal axis defining a tube and enclosing a portion of the inner shaft and movable in axial direction. in relation to the inner shaft, two ball paths arranged in the inner shaft, and balls arranged in the ball paths. The inner shaft is arranged so that rotation of the inner shaft relative to the outer shaft is prevented, each of the ball tracks comprising an outer ball track portion, and an inner ball track portion for returning the balls to the outer ball track portion.
    The outer ball track portion is partially open so that the balls arranged in the outer ball track portion are arranged to roll between the outer ball track portion and the inside of the outer shaft when the inner shaft is displaced axially relative to the outer axis. The telescopic shaft is characterized in that the telescopic shaft comprises at least one movable ball track member which forms at least a part of the outer ball track portion and a spring member arranged between the inner shaft and the movable ball track member, which spring means is arranged to press the movable ball track member and the in the ball path means the balls are arranged against the inside of the outer shaft, so as to bias the telescopic shaft.
    Because the telescopic shaft comprises at least one movable ball track member which is pressed against the inside of the outer shaft by means of a spring member, a good abutment of the balls against the outer shaft will be provided.
    The movable ball track member may be divided and comprise two parallel ball track halves, the longitudinal axes of which are arranged substantially parallel to the longitudinal axis of the inner shaft. By dividing the ball track member into two parallel ball track halves, the two ball track halves will be pressed against the walls when they are arranged in a groove in the inner shaft. This eliminates play on the inner shaft and thus makes manufacturing tolerances less strict.
    The movable ball track member may be arranged in a groove in the inner shaft, which groove is arranged parallel to the longitudinal axis of the inner shaft. By arranging the movable ball track member in a groove in the inner shaft, a stable attachment of the movable ball track member is obtained.
    The spring member can be designed in any of a large number of ways. According to one embodiment, the spring means consists of at least one washer spring. The spring means may of course comprise a large number of washer springs. As an alternative to washer springs, the spring means may comprise coil springs or some other suitable type of spring.
    The outer shaft may comprise grooves on the inside which extend parallel to the longitudinal axis, which grooves the balls in the outer ball track portions are arranged to cooperate with. With such grooves a latch is obtained which prevents rotation of the inner shaft relative to the outer shaft.
    The means for preventing rotation of the inner shaft relative to the outer shaft may at least in part consist of the interaction between the outer ball track portions, the balls and the grooves on the inside of the outer shaft. The balls that interact with the grooves in the outer shaft are limited in their freedom of movement by the outer ball track portions.
    The telescopic shaft may comprise a ball holder means fixedly mounted on the inner shaft, in which ball holder means the ball paths are arranged. Such a ball holder means can be manufactured as a separate unit which is attached to an inner shaft of suitable length. This results in a modularized construction that can be easily adapted to different lengths of telescopic shafts. The ball holder means may be provided with fixed projections and the outer shaft may be provided with grooves arranged to cooperate with the fixed projections to provide additional means for preventing rotation of the inner shaft relative to the outer shaft. .
    Alternatively, this may be the only means of preventing rotation of the inner shaft relative to the outer shaft. In the latter case, the balls do not interact with any groove in the outer shaft.
    The telescopic shaft may comprise an elastic spacer between the movable ball track member and the inner shaft. This results in a quieter and softer function of the telescopic shaft by damping the transmission of vibrations and sound from the vehicle's chassis to the steering wheel.
    The elastic liner may be an elastic liner for each of the ball lane halves. This simplifies assembly of the liner.
    The elastic liner may be of any suitable material. According to a preferred embodiment, the liner is made of plastic.
    Telescopic shaft advantageously comprises only two ball paths, the outer portions of which are diametrically opposite each other in relation to the longitudinal axis. Such a telescopic shaft provides a satisfactory function at a low price.
    According to a second aspect of the present invention there is provided a motor vehicle comprising a plurality of wheels, of which at least two wheels are steering wheels, a steering gear to which the steering wheels are coupled, a steering wheel, and a telescopic axle according to the first aspect of the present invention. invention arranged between the steering gear and the steering wheel.
    Brief Description of the Drawings In the following, preferred embodiments of the invention will be described with reference to the accompanying drawings, in which: Figure 1 shows a motor vehicle in which a telescopic axle according to the invention is arranged.
    Figure 2 shows a telescopic shaft according to an embodiment of the present invention.
    Figure 3 shows, partly in cross-section, a part of the telescopic shaft in Fig. 2 and more particularly shows a ball holder member which is arranged at the end of an inner shaft.
    Figure 4 shows the telescopic shaft in cross section along the longitudinal axis according to a first embodiment of the invention. Figure 15 shows the telescopic shaft in cross-section along the longitudinal axis an embodiment of the invention.
    Description of Preferred Embodiments In the following description of preferred embodiments of the invention, the same reference numerals will be used for the same features in the various figures. The drawings are not to scale.
    Fig. 1 shows a motor vehicle 1 in which a telescopic shaft 2 according to the present invention is arranged. The motor vehicle comprises rear wheels 101 and front wheels 102 which are steering wheels.
    The motor vehicle comprises a steering gear 103 to which the steering wheels 102 are coupled, a steering wheel 104, and a telescopic shaft 2 arranged between the steering gear 103 and the steering wheel 104. The motor vehicle 1 comprises a tiltable cab which is shown in its normal position of use with the solid line 105 and in its tilted position with the dashed line 106. The telescopic shaft 2 comprises a first bracket 107 arranged to be coupled to the steering wheel 104 and a second bracket 108 which is arranged to be coupled to the steering gear 103. The motor vehicle also comprises a chassis 111. The cab is resiliently suspended and chassis 111.
    Fig. 2 shows a telescopic shaft 2 according to an embodiment of the invention, which can be arranged in a motor vehicle 1 according to Fig. 1. The telescopic shaft 2 comprises an inner shaft 3 with a longitudinal shaft 4, an outer shaft 5 with a longitudinal shaft 6, which defines a tube and encloses a part of the inner shaft 3 and which is movable in axial direction relative to the inner shaft 3. Figure 3 shows partly in cross section a part of the telescopic shaft 2 in Fig. 2. Fig. 4 shows in cross section along the longitudinal axis 6 the inner shaft 3 and the outer shaft 5. The first bracket 107 is connected to the inner shaft by means of a first knot cross 109. Correspondingly, the second bracket 108 is connected to the outer shaft by means of a second knot cross 110. At the end of the inner shaft 3 which is enclosed by the outer shaft 5, there is arranged a ball holding member 7 with two ball paths 8, 9. In each of the ball paths 8, 9, a number of balls 10 are arranged to circulate upon movement of the inner shaft 3 relative to the outer shaft. 5. Each of kulba noma 8, 9, comprises an outer ball track portion 11, and an inner ball track portion 20 for returning the balls 10 to the outer ball track portion 11, the outer ball track portion 11 being partially open so that the balls 10 arranged in the outer ball track portion 11 are arranged to rolling between the outer ball track portion 11 and the inside of the outer shaft 5 when the inner shaft 3 is displaced axially relative to the outer shaft 5. The telescopic shaft 2 comprises a first movable ball track member 12 which forms at least a part of the outer ball track portion 11. and a spring means 13 which is arranged between the ball holding means 7 and the first movable ball path means 12. The telescopic shaft 2 also comprises a second ball path means 14 which, however, is not movable relative to the ball holding means 7. The first movable ball path means 13 is arranged in a first groove 15 in the inner shaft, which groove 15 is arranged parallel to the longitudinal axis 4 of the inner shaft. Correspondingly, the second ball in the embodiment shown, the ball path means consists of two ball path halves 17, 18. The spring means 13 is arranged to press the first ball path means 12 and the balls 10 arranged in the ball path means 12. against the inside of the outer shaft 5, in order thus to bias the telescopic shaft 2. In the embodiment shown, the spring means 13 are washer springs.
    The outer shaft 5 comprises grooves 19 on the inside which extend parallel to the longitudinal axis 6, which grooves 19 the balls 10 in the outer ball track portion 11 are arranged to cooperate with.
    Thereby, rotation of the inner shaft 3 relative to the outer shaft 5 is prevented.
    The ball retaining means 7 is provided with fixed projections 21 and the outer shaft 5 is provided with grooves 22 which are arranged to cooperate with the fixed projections 21 to provide further means for preventing rotation of the inner shaft 3 relative to the outer shaft. 5.
    A first elastic spacer 23 is arranged between the first movable ball track member 12 and the ball holder means 7. A second elastic spacer 24 is arranged between the second ball track member 14 and the ball holder means 7. The elastic spacers 23, 24 are according to a preferred embodiment of plastic. The elastic liner may be divided into a number of parts.
    Fig. 5 shows the telescopic shaft in cross-section along the longitudinal axis an embodiment of the extension. The inner shaft 3 comprises a tube. At the end of the pipe there is arranged a ball holder member 7 which is inserted into the pipe. Fig. 5 shows the first ball path 8 and the second ball path 9. The ball paths are formed by the ball holder means 7 and an end cap 25. In the first ball path 8 the first movable ball path means 12 is arranged to be pushed out against the outer shaft 5 by means of the spring means 13. In the second ball path 9, the second ball path means 14 is arranged to guide the balls. The ball holder means 7 has an end portion 26 extending through the end cap 25. On the outer end of the end portion 26 there is arranged a locking member 27 which prevents the end cap 25 from coming loose from the end portion 26.
    The function of a telescopic shaft according to the described embodiments will now be described. When traveling with the motor vehicle, road bumps will cause the cab 105 to move relative to the chassis 111. This will cause the steering wheel 104 to move relative to the steering gear 103. These movements between the steering wheel and the steering gear 103 will be absorbed by the telescopic shaft 2, in that the inner shaft 3 can move axially relative to the outer shaft 5. During movements between the inner shaft 3 and the outer shaft 5, the balls 10 in the ball paths 8, 9 will be kept in contact with the outer shaft 5 due to the spring member 13 pressing the balls in the outer portion 11 of the first ball path 8 against the outer shaft 5. When the inner shaft 3 is moved relative to the outer shaft 5, this will lead to the balls in the ball paths 8, 9, will be fl moved around between the inner and the outer axis.
    Thus, the stroke length is not limited by the length of the ball paths. This means that the telescopic shaft can easily absorb the large movement that occurs when the cab is tilted.
    The described embodiments can be modified in many ways without departing from the spirit and scope of the invention which is limited only by the appended claims.
    It is of course possible to arrange more than two ball paths in the ball holder means.
    The telescopic shaft is typically 0.1 - 3 meters long. Preferably, the telescopic shaft is 0.5-2 meters long.
    The telescopic shaft can have a diameter of 0.01-0.2 meters, but typically has a diameter of 0.02-0.11 meters. Preferably, the telescopic shaft has a diameter of 0.03-0.06 meters.
    权利要求:
    Claims (12)
    [1]
    A telescopic shaft (2) for motor vehicles (1), which comprises an inner shaft (3) with a longitudinal shaft (4), an outer shaft (5) with a longitudinal shaft (6), which they ett n a tube and enclose a part of it inner shaft (3) and which is movable in axial direction relative to the inner shaft (3), two ball paths (8, 9) arranged in the inner shaft (3), and balls (10) arranged in the ball paths (8, 9 ), the inner shaft (3) being arranged so that rotation of the inner shaft (3) relative to the outer shaft (5) is prevented, each of the ball paths (8, 9) comprising an outer ball path portion (11 ), and an inner ball track portion (20) for returning the balls (10) to the outer ball track portion (11), the outer ball track portion (11) being partially open so that the balls (10) provided in the outer ball track portion (11) are arranged to roll between the outer ball path portion (11) and the inside of the outer shaft (5) when the inner shaft (3) is displaced axially relative to the outer shaft (5), characterized in that the scope shaft (2) comprises at least one movable ball track member (12) which forms at least a part of the outer ball track portion (11) and a spring member (13) which is arranged between the inner shaft (3) and the movable ball track member (12). ), which spring means (13) is arranged to press the movable ball track member (12) and the balls (10) arranged in the ball track means against the inside of the outer shaft (5), so as to bias the telescopic shaft (2). .
    [2]
    Telescopic shaft (2) according to claim 1, wherein the movable ball track member (12) is arranged in a groove (15) in the inner shaft (3), which groove (15) is arranged parallel to the longitudinal axis of the inner shaft (3).
    [3]
    Telescopic shaft (2) according to claim 1 or 2, wherein the movable ball track member (12) comprises two parallel ball track halves (17, 18), the longitudinal axes of which are arranged substantially parallel to the longitudinal axis (4) of the inner shaft (3). .
    [4]
    Telescopic shaft (2) according to claim 1, 2 or 3, wherein the spring member (13) consists of at least one washer spring.
    [5]
    Telescopic shaft (2) according to any one of the preceding claims, wherein the outer shaft (5) comprises grooves (19) on the inside which extend parallel to the longitudinal axis (6), which grooves (19) have the balls (10) in the outer the ball track portions (11) are arranged to cooperate with.
    [6]
    Telescopic shaft (2) according to claim 5, wherein the means for preventing rotation of the inner shaft (3) relative to the outer shaft (5) are at least partly constituted by co-operation between the outer ball path portions (11), the balls (10). ) and the grooves (19) on the inside of the outer shaft (5). 10 15 20
    [7]
    A telescopic shaft (2) for motor vehicles (1) according to any one of the preceding claims, comprising a ball holder means (7) fixedly mounted on the inner shaft (3), in which ball holder means (7) are the ball paths (8, 9) arranged.
    [8]
    Telescopic shaft (2) according to any one of the preceding claims, wherein the ball holder means (7) is provided with fixed projections (21) and the outer shaft (5) is provided with grooves (22) which are arranged to cooperate with the fixed projections. (21) to provide additional means for preventing rotation of the inner shaft (3) relative to the outer shaft (5).
    [9]
    A telescopic shaft (2) according to any one of the preceding claims, comprising an elastic spacer (23) between the movable ball track member (12) and the inner shaft (3).
    [10]
    A telescopic shaft (2) according to claim 9, wherein the elastic liner (23) is made of plastic.
    [11]
    Telescopic shaft (2) according to one of the preceding claims, comprising only two ball paths (8, 9), the outer portions (11) of which are diametrically opposite to one another in relation to the longitudinal axis (4).
    [12]
    A motor vehicle (1) comprising a plurality of wheels (101, 102), of which at least two wheels are steering wheels (102), a steering gear (103) to which the steering wheels (102) are coupled, a steering wheel (104), and a telescopic shaft (2) according to any one of claims 1-11, arranged between the steering gear (103) and the steering wheel (104).
    类似技术:
    公开号 | 公开日 | 专利标题
    EP1930610B1|2011-11-23|Telescopable shaft and steering device for vehicle
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    KR101271294B1|2013-06-04|Rack Bar Supporting Device of Steering Apparatus for Vehicle
    CN107031710B|2019-12-06|Speed reducer of electric power steering apparatus
    US20130112493A1|2013-05-09|Rack-driven steering apparatus and rack-driven auxiliary power steering apparatus including the same
    CN111372833A|2020-07-03|Steering column for a motor vehicle
    KR101294180B1|2013-08-08|Slip apparatus of universal joint for steering appratus
    KR20090071917A|2009-07-02|The universal joint shaft for the vehicle steering device
    KR100804443B1|2008-02-20|Steering System Equipped with Support-Yoke Supporting Rack-Bar
    US9302706B2|2016-04-05|Articulated connection for transferring a steering movement onto a vehicle wheel
    CN103158468A|2013-06-19|Anti-roll system for vehicles
    KR20110092661A|2011-08-18|Rack bar supporting device of steering apparatus for vehicle
    KR101419986B1|2014-07-16|Intermediate Shaft of Steering Apparatus for Vehicle
    KR20040104139A|2004-12-10|A support-yoke noise prevention structure of a steering system
    KR101214269B1|2012-12-20|Slip Joint of Steering Apparatus for Vehicle
    KR20090117128A|2009-11-12|Intermediate shaft for vehicle
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    CN205396202U|2016-07-27|Car is with middle shaft device who turns to device
    JP6227486B2|2017-11-08|Propeller shaft support structure
    CN203637930U|2014-06-11|Buffering structure of steering-gear assembly of automobile
    KR20220022265A|2022-02-25|Rack bush of steering apparatus for vehicle
    KR20140112937A|2014-09-24|Rack Bush Assembly and Rack and Pinion type Steering Apparatus for Vehicle having the same
    KR101467021B1|2014-12-01|Rack Bush, and Rack and Pinion Type Steering Apparatus for Vehicle Having The Same
    CN105365880B|2018-06-05|A kind of rack and pinion steering gear
    同族专利:
    公开号 | 公开日
    US20130053156A1|2013-02-28|
    SE534849C2|2012-01-17|
    WO2011139217A1|2011-11-10|
    US8801525B2|2014-08-12|
    EP2566742B1|2017-04-19|
    EP2566742A1|2013-03-13|
    EP2566742A4|2016-04-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    SU151910A1|1961-12-12|1962-11-30|И.А. Авнуков|Ball Joint|
    DE2538686C3|1975-08-30|1981-07-30|Lwm Lemfoerder Gelenkwellen Gmbh, 2844 Lemfoerde|Bearing for axially displaceable parts that can be coupled to one another in the direction of rotation, in particular articulated shafts guided like a telescope|
    US4384861A|1979-10-10|1983-05-24|Firma LWM Lemforder Gelenkwellen GmbH|Universal joint shaft, particularly for a steering column of motor vehicles|
    DE4119451C2|1991-06-13|1993-03-25|Lemfoerder Metallwaren Ag, 2844 Lemfoerde, De|
    FR2795785B1|1999-06-30|2002-06-28|Nacam|BALL COUPLING DEVICE FOR TWO SLIDING SHAFTS|
    DE19933875B4|1999-07-22|2014-10-16|Schaeffler Technologies Gmbh & Co. Kg|Linear roller bearing for transmitting torques|
    CA2426792C|2000-10-24|2010-08-03|Thomson Industries, Inc.|Linear motion bearing segment|
    US6805637B2|2002-09-20|2004-10-19|Delphi Technologies, Inc.|Shaft assembly with recirculating ball roller joint unit|CN102700608B|2012-06-27|2013-11-20|山西大运汽车制造有限公司|Large-range telescopic steering transmission shaft|
    TWM456972U|2013-01-24|2013-07-11|Taiwan Hodaka Ind Co Ltd|Inner tube and outer tube direction restraining mechanism of bicycle seat tube|
    KR102208239B1|2019-07-26|2021-01-28|남양넥스모 주식회사|Intermediate shaft|
    CN111911544A|2020-07-24|2020-11-10|中国航发贵州红林航空动力控制科技有限公司|Coupler with retainer without generating axial force|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1050436A|SE534849C2|2010-05-03|2010-05-03|Telescopic Shaft|SE1050436A| SE534849C2|2010-05-03|2010-05-03|Telescopic Shaft|
    PCT/SE2011/050533| WO2011139217A1|2010-05-03|2011-04-29|Telescopic shaft|
    EP11777654.2A| EP2566742B1|2010-05-03|2011-04-29|Telescopic shaft|
    US13/695,825| US8801525B2|2010-05-03|2011-04-29|Telescopic shaft|
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