阅读说明：本技术 用于机动车辆的转向柱 (Steering column for motor vehicles ) 是由 塞巴斯蒂安·福特 罗伯特·加莱尔 于 2018-04-11 设计创作，主要内容包括：本发明的目的是提供一种用于机动车辆的转向柱,该转向柱包括转向轴(4)和旋转限制器(22),该转向轴(4)以能够绕纵向轴线(L)旋转的方式安装在转向柱壳体(6)中,所述转向柱确保可靠的操作并且不易于发出嘎嘎声。该目的的实现在于,旋转限制器(22)具有止挡盘(23),该止挡盘(23)连接至转向轴(4)以传递扭矩；止挡盘(23)具有在周向方向上延伸的至少一个凹口(24、25)；并且转向轴(4)联接至升降机构(28、29、30),借助于升降机构(28、29、30)可以使以在纵向轴线(L)的方向上可移动且在周向方向上固定的方式安装的止挡销(30)根据转向轴(4)的旋转角度与凹口(24、25)接合,使得止挡销(30)在达到转向轴(4)的允许的旋转角度时抵接凹口(24、25)位于周向方向上的边界(34、35)并且防止沿相同旋转方向的进一步旋转。(The object of the present invention is to provide a kind of steering columns for motor vehicles, the steering column includes steering shaft (4) and rotational limit stop (22), the steering shaft (4) is mounted in steering column shell (6) in a manner of it can rotate around longitudinal axis (L), and the steering column ensures reliably to operate and be not easy to issue quack sound.The purpose is realised in that rotational limit stop (22) has backstop disk (23), which is connected to steering shaft (4) to transmit torque；Backstop disk (23) has at least one recess (24,25) extended in circumferential direction；And steering shaft (4) is attached to elevating mechanism (28, 29, 30), by means of elevating mechanism (28, 29, 30) pin (30) installed in a manner of removable on the direction of longitudinal axis (L) and fixed in circumferential direction can be made according to the rotation angle and recess (24 of steering shaft (4), 25) it engages, so that pin (30) abuts recess (24 when reaching the rotation angle of permission of steering shaft (4), 25) it is located at the boundary (34 in circumferential direction, 35) and further rotating along identical direction of rotation is prevented.)

1. a kind of steering column for motor vehicles, the steering column includes steering shaft (4) and rotational limit stop (22), described turn It is mounted in steering column shell (6) to axis (4) so as to be rotated around longitudinal axis (L), which is characterized in that the rotation limitation Device (22) includes backstop disk (23), and the backstop disk (23) is connected to the steering shaft (4) to transmit torque, the backstop disk (23) include at least one recess (24,25) extended in circumferential direction, the steering shaft (4) be attached to elevating mechanism (28, 29,30), can be made by means of the elevating mechanism (28,29,30) with can be in the square upward displacement of the longitudinal axis (L) And rotation angle and institute of the pin (30) that the mode that cannot be shifted in circumferential direction is installed according to the steering shaft (4) Recess (24,25) engagement is stated, so that the pin (30) is hit when reaching the rotation angle of permission of the steering shaft (4) It hits the boundary (34,35) of recess (24,25) and prevents from further rotating along identical direction of rotation, the boundary is located at circumferential On direction.

2. steering column according to claim 1, which is characterized in that the pin (30) and the elevating mechanism (28, 29) it is arranged in steering column shell (6).

3. steering column according to claim 2, which is characterized in that the pin (30) is in a manner of being axially displaceable It is mounted in sleeve (36), the sleeve (36) is rigidly connected to the steering column shell (6) or is rigidly connected to institute In the hole for stating steering column shell (6).

4. steering column according to one of the preceding claims, which is characterized in that the elevating mechanism (28,29,30) Including gear (28), the gear (28) is provided with the lifting groove (29) for shifting the pin (30).

5. steering column according to claim 4, which is characterized in that the pin (30) is provided with circulating type groove (31), the lifting groove (29) is bonded in the circulating type groove (31).

6. the steering column according to any one of claim 4 and 5, which is characterized in that the lift of the pin (30) (37) it is greater than 2mm.

7. according to steering column described in one in claim 4 to 6, which is characterized in that the gear (28) and pinion gear (27) it engages, wherein the pinion gear (27) is connected to the steering shaft (4) to transmit torque.

8. steering column according to claim 7, which is characterized in that between the pinion gear (27) and the gear (28) Reduction ratio is between 2:1 between 4:1.

9. according to steering column described in one in claim 4 to 8, which is characterized in that have the institute of the lifting groove (29) It states gear (28) and the pin (30) is mounted in the cover (35) that can be removed of the steering column shell (6).

10. steering column according to one of the preceding claims, which is characterized in that the recess (24,25) is configured to Two elongated holes, described two elongated holes are 90 ° to 160 ° in the circumferential direction of the backstop disk (23) in all cases Angular range in extend.

Technical field

The present invention relates to a kind of steering column for motor vehicles, which includes steering shaft and rotational limit stop, is somebody's turn to do Steering shaft is mounted in steering column shell to rotate around longitudinal axis.

Background technique

Such system especially is used in the steering system of steering-by-wire.

The characteristics of steering column of steering-by-wire, is that there is no mechanical connections between steering wheel and steerable wheel.However, The rotation of steering wheel is limited in order in the case where not having mechanical connection even if between steering wheel and steerable wheel, it is necessary to revolve Turn the stop part that side sets up the rotation of limitation steering wheel.In this case, direction disc spins are needed to be more than by convention One circle is to be diverted to stop position from stop position.

103 12 516 A1 of DE discloses a kind of steering column with rotation limitation, wherein being provided with respectively has spiral shell Two disks of shape track are revolved, and are disposed with ball between the spiral path.During the rotation of steering shaft, ball is in spiral It is moved in shape track.The known solution has the shortcomings that the high susceptibility to tolerance, reason are that tolerance leads to ball energy It enough issues quack sound and is stuck in spiral path.

Summary of the invention

The purpose of the present invention is a kind of steering column with rotational limit stop is described in detail, which ensures reliably to grasp Make and is not easy to issue quack sound.

The purpose is realized by the feature of Patent right requirement 1.Advantageous implementation is described in the dependent claims Mode.

In the case where steering column according to the present invention, rotational limit stop has backstop disk, which is connected to steering Axis is to transmit torque, wherein the backstop disk has at least one recess extended in circumferential direction, and steering shaft is attached to Elevating mechanism can make by means of the elevating mechanism with displaceable and not removable in circumferential direction in the direction of the longitudinal axis Rotation angle of the pin that the mode of position is installed according to steering shaft and a recess engagement or disengagement in the recess, So that pin hits the boundary of recess and prevents along identical rotation side in the rotation angle for the permission for reaching steering shaft To further rotating, the boundary is located in circumferential direction.

The steering column is preferably set to the steering system for steering-by-wire.

Backstop disk can be preferably incorporated in two recesses extended in circumferential direction.

Solution according to the present invention has an advantage that big in the rotation angle of permission of the pin in steering shaft Is not engaged with recess in part rotation angle, and therefore, the pin not with the borderless contact of recess.This first makes sure Reliable low abrasion operation in a long time, and secondly prevent due to the contact between pin and the boundary of recess and The noise of " quack " can occur in driving mode in usual steering angular region.

Within the scope of the invention, term " recess " includes both hole and backstop disk groove of backstop disk, the hole of backstop disk Extend in circumferential direction with both backstop disk grooves, and pin can be bonded on hole and the backstop disk groove two of backstop disk Be located at the end in circumferential direction in person and against it, pin can hit with prevent steering shaft along identical direction of rotation into The rotation of one step.Backstop disk herein needs not be circular.Particularly, recess also can be structured as in the form of lacking disk section, and And therefore, backstop disk is for example similar to propeller.

Within the scope of the invention, term " pin " not only includes simple pin or bolt, but also including be suitable for Backstop disk according to the present invention interacts to prevent the hook, pawl and all embodiment party being contemplated that of the rotation of the backstop disk Formula.

Pin and elevating mechanism are advantageously arranged in steering pillar shell body.Such steering column shell is under any circumstance All exist, and therefore can retrofit in a simple manner according to the present invention.

In favourable improvement of the invention, pin is mounted in sleeve in a manner of axially displaceable, sleeve rigidity Ground is connected to steering column shell or is rigidly connected in the hole of steering column shell.The measure can be held with simple method It goes and ensures reliably being slidably installed for pin.

In another favourable improvement of the invention, elevating mechanism includes gear, which is provided with for moving pin The lifting groove of position.Lifting groove is the disk for the circumference for being connected to gear and protruding past gear in radial directions, and the shape that shapes At making its radially outward edge be in occupy the shape of the fluctuating of different positions in the axial direction according to the rotation angle of gear. The shape of outer peripheral fluctuating includes at least one recessed portion between two lug bosses, and the recessed portion is in longitudinal axis Side be upwardly formed.In other words, the shape of fluctuating is the axial end surface shape in the radial outer region of gear along gear At trough of belt guide rails.When the steering shaft for being attached to elevating mechanism rotates, gear and lifting groove rotate simultaneously, wherein Lifting groove makes pin in the axial direction according to the position of the radially outward edge of the lifting groove for the rotation angle for depending on gear Upper displacement.

However, elevating mechanism can also be constructed with linear design, such as in the form of the rack gear for being connected to linear lifting groove.

Pin is advantageously provided with circulating type groove, and lifting groove is bonded in the circulating type groove.Therefore, pin had been both It, can also be in a manner of high precision along phase in the axial region for the recess that backstop disk can be moved in a manner of high precision Opposite direction removes the axial region.

Be reliably engaged in order to ensure pin in the respective notches of backstop disk, the lift of pin be advantageously greater than 2mm, preferably even it is greater than 3mm.Lift is preferably smaller than 20mm.Particularly preferably it is less than 10mm.Lift greater than 20mm for The configuration of slot geometry be it is unfavorable, reason be the lift need high pitch so that pin in low-angle enter engagement and It is disengaged, and elevating mechanism is therefore made to be easy inclination.

In another favourable improvement of the invention, gear is engaged with pinion gear, wherein pinion gear is connected to steering shaft to pass Torque delivery.Can realize speed reduction gearing in a very simple way in this fashion, wherein pinion gear and gear it Between reduction ratio advantageously between 2:1 and 4:1, it is therefore preferable to 3:1.The measure ensure steering wheel can from stop position to Stop position executes the rotation between the circle of Liang Quan and four, i.e., executes Jie from the central location of steering wheel along each direction of rotation Rotation between the circle of Yu Yiquan and two.Reduction ratio is preferably 3:1, and therefore steering wheel can be hit in steering wheel according to this About three are rotated before a rotational limit stop in the rotational limit stop of invention between two end stops to enclose, i.e. therefrom Entreat position along about 1.5 circle of each direction of rotation rotation.

The gear and pin that have lifting groove can be by being mounted on the removable lid of steering column shell by the present invention It is advantageously further improved in component.The end back to steering wheel of the cover covering steering column shell, and turn to Axis terminates at the end.The small tooth for driving elevating mechanism can be arranged in a simple manner in the end of steering shaft Wheel.If gear relative to steering shaft rotation axis off-center be mounted in the cover, by the way that cover is disposed Gear is engaged with pinion gear on to steering column shell.When backstop disk according to the present invention be directly arranged at it is small in steering shaft When gear rear, once cover is connected to steering column shell, then being arranged in pin in neighbouring cover can also be with Simple mode is engaged with the recess of backstop disk.

The recess of backstop disk is advantageously configured as two elongated holes, and described two elongated holes are in the circumferential direction of backstop disk In all cases to extend in 90 ° to 160 ° of angular range.The angular range, which ensures to hit in the pin, is located at length Before the boundary of the end in shape hole, pin can be driven fully into the rotation phase in backstop disk from the pull-out location of pin Between in the corresponding elongated hole that moves through.

Detailed description of the invention

Exemplary embodiments of the present invention are described in more detail below with reference to accompanying drawings.

In the accompanying drawings, in detail:

Fig. 1: the schematic diagram of the steering system of steering-by-wire is shown；

Fig. 2: the perspective view of the steering column according to the present invention with rotational limit stop is shown；

Fig. 3: the partial view of steering column according to fig. 2 is shown with exploded；

Fig. 3 a: the exploded view of rotational limit stop is shown；

Fig. 4: the top view of the necessary parts of rotational limit stop is shown；

Fig. 5: the side view of the necessary parts of rotational limit stop is shown；

Fig. 6: the perspective view of the necessary parts of the rotational limit stop in the first motion stage is shown, wherein backstop Pin is not in engagement state；

Fig. 7: the view identical with Fig. 6 in the second motion stage is shown, wherein pin is not in joint shape State；

Fig. 8: the view identical with Fig. 6 in third motion stage is shown, wherein pin is in joint shape State.

Specific embodiment

Fig. 1 shows the steering system with steering column 2 and the steering-by-wire for motor vehicles for turning to actuation means 3 1.Steering column 2 includes steering shaft 4, the steering shaft 4 supporting direction disk 5 and the most of arrangement of the steering shaft 4 at one end In steering column shell 6, the rotation volume for electronic activation electric powered steering actuation means 3 is accommodated in the steering column shell 6 Code device (not shown).So-called manual torque actuator is also accommodated in steering column shell 6, the manual torque actuator is with defeated The feedback provided to the form of the torque in steering shaft 4 to driver about driving situation is provided.Steering column 2 is via connection cables 7 It is connected to and turns to actuation means 3.The steering actuation means include the steering actuator shell 8 with steering motor 9, turning horse Up to 9 driving pinions 10, pinion gear 10 itself is engaged with the rack gear 11 acted on two drag links 12, and wheel 13 can pass through Described two drag links 12 pivot.Steering actuator shell 8 accommodates torque sensor (not shown), torque sensor measurement So that wheel 13 is pivoted required torque and is transmitted on steering column 2 as the feedback for driver.

Fig. 2 shows the necessary parts of the steering column 2 with steering column shell 6, with rotatable in steering column shell 6 Mode is equipped with steering shaft 4.Steering column shell 6 is pivotally maintained on support unit 61, wherein support unit 61 can connect to vehicle.Steering column 2 includes inner sleeve case member 15, and steering shaft 4 is rotatably mounted to the interior sheath body In component 15, wherein inner sleeve case member 15 can be on the also referred to as direction of the longitudinal axis L of axial direction 17 relative to outer Case member 16 is covered to shift.In order to which inner sleeve case member 15 to be fixed in housing case member 16, it is provided with clamp device 18, the fastening The housing case member 16 for being provided with slot 19 is clamped together by device 18, and therefore inner sleeve case member 15 is fixedly clamped in In housing case member 16.Operating lever 20 is provided with for clamping and releasing clamp device 18.Steering column shell 6 have back to The end sections 21 of steering wheel 5, and rotational limit stop 22 according to the present invention is accommodated in the end sections 21.

Fig. 3 shows how rotational limit stop 22 is arranged in end sections 21.Backstop disk 23, which directly rests upon, to be turned Steering shaft 4 is connected in the region of end sections on axis 4 and in steering shaft 4 to transmit torque.Backstop disk 23 has Extend and be designed to two recesses 24,25 of elongated hole in circumferential direction.In addition, being disposed in the end of steering shaft 4 Pinion gear 27, the pinion gear 27 are connected to steering shaft 4 to transmit torque.Pinion gear 27 is engaged with gear 28, and gear 28 is prejudicially It is mounted in steering column shell 6, and gear 28 and pinion gear 27 are formed together speed reduction gearing 26.In this exemplary implementation In mode, reduction ratio 3:1, but reduction ratio can also be advantageously between 2:1 and 4:1.

Gear 28 is connected to lifting groove 29 to transmit torque.Lifting groove 29 includes disk, and the diameter of the disk is greater than gear 28, and And therefore the disk radially protrudes past the excircle of gear 28.Gear 28 and lifting groove 29 are preferably single-piece one Body component.As on 17, being seen on the direction of longitudinal axis L, lifting groove 29 is outside its circumferential direction in the axial direction Form bending at edge region to rise and fall.The outer edge region of lifting groove 29 is engaged with pin 30, and pin 30 is by means of set Cylinder 36 is mounted in steering column shell 6 in a manner of it can be shifted in the axial direction 17 but is not displaceable in circumferential direction.Only Backing pin 30 is provided with circulating type groove 31, and lifting groove 29 is bonded in circulating type groove 31.

As being particularly easy to see in Fig. 3 and Fig. 3 a, gear 28 and pin 30 with lifting groove 29 are mounted on In the removable cover 35 of steering column shell 6.Gear 28 is arranged in the closed opening 350 of cover 35, wherein Gear 28 is rotatably mounted on axle journal 351, wherein the closing of lid 400 opening 350.The fixed gear 28 of lid 400 to prevent Only in the square upward displacement of longitudinal axis L, prevent from shifting on axle journal 351.Opening 350 is by extending in the axial direction 17 Wall 354 defines.Cover 35 include lug boss 352, the protrusion 352 be radially formed on the outside of wall 354 and It is formed and receives opening 355, pinion gear 27 is arranged in receiving opening 355.Exist between lug boss 352 and edge 354 radial The receiving opening 355 of hole 356, opening 350 and pinion gear 27 is connected to each other due to radial hole 356, so that pinion gear 27 and tooth 28 engagement of wheel.Wall 354 includes receiving portion 353, and pin 30 is maintained in receiving portion 353 in a manner of displaceable.Tooth Thus the arranged off-centre of wheel 28, lifting groove 29 and pin 30 is possibly realized in a simple manner.

If driver rotates steering wheel 5, it is connected to 4 driving pinion 27 of steering shaft and gear 28 of steering wheel 5.With The pin 30 that lifting groove 29 engages follows the outer peripheral position of lifting groove 29 on 17 in the axial direction.In most of circumference On, the outer edge of lifting groove 29 is in following axial positions: in this axial position, pin 30 is kept and 23 phase of backstop disk Away from distance a.Direction of the outer edge of lifting groove 29 only in small circumferential area along backstop disk 23 is axially formed, result It is, until pin 30 also reaches following positions at the point 32 in backstop disk towards backstop disk 23 is mobile: in this position, Pin 30 is bonded in a recess in two recesses 24,25 for being designed as elongated hole of backstop disk 23.It is shown in FIG. 8 Such case.If driver now attempts to CW along clockwise direction and further rotates steering wheel 5, the boundary of elongated hole 25 33 contact with pin 30, and which prevent further rotating for steering shaft 4.During described operation, pin 30 is most High-lift 37 is about 3mm.Maximum lift 37 is at least twice of the size of distance a.It may thereby be ensured that pin 30 is securely It is bonded in recess 24,25.

If CCW rotates steering wheel 5 to driver in the counterclockwise direction now, after the rotation of steering shaft 4 about half-turn, Gear 28 with lifting groove 29 has been rotated by about 1/6 circle, i.e. by about 60 °, and the therefore circle of lifting groove 29 The point 32 in all regions occupies position shown in fig. 7.The biggish circumferential area of lifting groove 29 --- the circumferential area and backstop Disk 23 in the axial direction on 17 larger distance away --- be now currently located at the position of pin 30.As a result, pin 30 is Through shifting in the axial direction 17 and departing from the engagement with backstop disk 23.Even if steering wheel 5 and steering shaft 4 are along side counterclockwise Xiang Zaixuan takes two turns, and pin 30 remains in the position.

The steering wheel 5 that the direction of rotation of CW and CCW counterclockwise clockwise is seen with the visual angle from vehicle driver always Direction of rotation is related.

Only when steering shaft 4 further rotates half-turn, the point 32 of the circumferential area of lifting groove 29 just arrives again at backstop The position of pin 30, in this position, pin 30 are mobile towards backstop disk 23 on 17 in the axial direction.Pin in the position into Enter in elongated hole 24 and therefore is engaged with backstop disk 23.Once the boundary 34 of elongated hole 24 is contacted with pin 30, then steering shaft 4 The rotation of CCW stops in the counterclockwise direction.

Boundary 34 therefore the left stopper section for forming the rotary motion for steering wheel 5 and steering shaft 4, and elongated hole 25 Boundary 33 forms the right stopper section for being used for the rotary motion, wherein steering wheel 5 and steering shaft 4 are practical between two stopper sections On can rotate 3 circles.

This can be by being formed together the mutual of the gear 28 of elevating mechanism 28,29,30 and lifting groove 29 and pin 30 Effect is to realize.

It is more that the transmission ratio of speed reduction gearing 26 determines that steering wheel 5 can rotate between two rotation stopper sections here Few circle.In addition, possible rotation angle of the steering wheel 5 between two end stops is also by elongated hole 24,25 in backstop disk Range in 23 circumferential direction determines.

In order to ensure pin 30 is reliably engaged in the elongated hole 24,25 of backstop disk 23, lifting groove 29 must shape Shape is at least 2mm and more preferably greater than 3mm at making lift 37 of the pin 30 in the axial direction on 17.

The characteristics of embodiment of rotational limit stop according to the present invention, is quietly to operate and is not damaging rotation Allow relatively large manufacturing tolerance in the case where the function of limiter.

Reference signs list

1. the steering system of steering-by-wire

2. steering column

3. turning to actuation means

4. steering shaft

5. steering wheel

6. steering column shell

7. connection cables

8. steering actuator shell

9. steering motor

10. pinion gear

11. rack gear

12. drag link

13. wheel

14. clamping device

15. inner sleeve case member

16. housing case member

17. axial direction

18. clamp device

19. slot

20. operating lever

21. end sections

22. rotational limit stop

23. backstop disk

24. recess/elongated hole

25. recess/elongated hole

26. speed reduction gearing

27. pinion gear

28. gear

29. lifting groove

30. pin

31. groove

32. the point of circumferential area

33. boundary

34. boundary

35. cover

36. sleeve

37. lift