CN213008327U - Steering column rotation limiting mechanism, steering system and vehicle - Google Patents

Abstract

The utility model relates to a rotatory stop gear of steering column, a steering system and vehicle, the rotatory stop gear of steering column is including being suitable for setting up in the limiting plate of steering column (100) and being used for fixing radial protrusion (21) on steering shaft (1), limiting plate (3) have first spacing portion (31) and the spacing portion of second (32), first spacing portion (31) with the spacing portion of second (32) is suitable for setting up about the axial the different sides of steering shaft (1) and at the corresponding side backstop radial protrusion (21)'s circumferential motion to inject in mutual cooperation the biggest turned angle of steering shaft (1). Through the technical scheme, the steering column rotation limiting mechanism provided by the disclosure can prevent the rotation angle of the steering shaft from exceeding the limit positions of other steering moving parts in the steering column, and reliably realizes rotation limitation of the steering shaft.

Description

Steering column rotation limiting mechanism, steering system and vehicle

Technical Field

The disclosure relates to the technical field of vehicles, in particular to a steering column rotation limiting mechanism, a steering system and a vehicle.

Background

In a steering system, a steering column is a connecting part installed between a steering wheel and a steering gear, the steering shaft at the input end of the steering column is connected with the steering wheel, the steering shaft at the output end of the steering column is connected with the steering gear, and when the steering system steers, torque is transmitted to the steering gear through the steering column by operating the steering wheel so as to realize vehicle steering.

In a steering column, some steering motion members (e.g., clock springs, etc.) can only rotate within a specified angular range, and the steering shaft is likely to rotate by an angle exceeding the limit position of the steering motion member.

SUMMERY OF THE UTILITY MODEL

The purpose of this disclosure is to provide a reliable steering column rotation limiting mechanism.

In order to achieve the above object, the present disclosure provides a steering column rotation limiting mechanism, which includes a limiting plate adapted to be disposed on a steering column and a radial protrusion for being fixed on a steering shaft, the limiting plate has a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are adapted to be disposed on different sides of the steering shaft with respect to an axial direction and stop circumferential movement of the radial protrusion on the corresponding sides, so as to cooperatively define a maximum rotation angle of the steering shaft.

Optionally, the limiting plate is capable of translating perpendicular to the axial direction relative to the steering column, and the limiting plate is connected to the steering shaft through a motion conversion structure, so that the limiting plate is driven to translate through rotation of the steering shaft.

Optionally, the motion conversion structure includes a meshing tooth and a rack that are matched with each other, the meshing tooth is disposed on the steering shaft, and the rack is disposed on the limiting plate.

Optionally, the steering column rotation limiting mechanism comprises a bracket adapted to be fixed to the steering column, and the limiting plate is slidably connected to the bracket.

Optionally, a guiding structure is configured between the bracket and the limiting plate to guide the limiting plate to translate perpendicular to the axial direction.

Optionally, the guiding structure includes a sliding groove and a sliding rail that are matched with each other, the sliding groove and the sliding rail extend along the length direction, one of the sliding groove and the sliding rail is disposed on the bracket, and the other of the sliding groove and the sliding rail is disposed on the limiting plate.

Optionally, the two end portions of the bracket in the moving direction of the limiting plate are both provided with anti-falling protrusions for stopping the limiting plate between the two anti-falling protrusions.

Optionally, a skid-proof member is arranged between the limiting plate and the bracket.

Optionally, the steering column rotation limiting mechanism includes a sleeve, the radial protrusion and the meshing teeth are formed on an outer surface of the sleeve, and the sleeve is coaxially and fixedly sleeved on the steering shaft.

Optionally, the sleeve is an interference fit on the steering shaft.

Optionally, the radial protrusion has a first end surface and a second end surface opposite to each other in the circumferential direction, the first position-limiting portion has a first position-limiting surface for abutting against the first end surface, and the second position-limiting portion has a second position-limiting surface for abutting against the second end surface.

On the basis of the technical scheme, the steering system is provided with the steering column rotation limiting mechanism.

On the basis of the technical scheme, the vehicle comprises the steering system.

By the technical scheme, when the rotating angle of the steering shaft in the first rotating direction reaches the limit value, the steering column rotation limiting mechanism stops the radial bulge through the first limiting part, so that the axial shaft is limited to continue rotating in the first rotating direction; when the angle of the steering shaft rotating along the second rotating direction reaches a limit value, the second limiting part stops the radial bulge so as to limit the steering shaft to rotate continuously along the second rotating direction, the first limiting part and the second limiting part cooperatively limit the maximum rotating angle of the axial shaft, the rotating angle of the steering shaft is prevented from exceeding the limit positions of other steering moving parts in the steering column, and therefore the rotation and rotation limiting of the steering shaft in the steering column are reliably realized. The steering column rotation limiting mechanism provided by the disclosure is simple and reliable in structure, and the phenomenon that the limit position is blocked or the reversing torque is increased cannot occur.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic perspective view of a steering column rotation limiting mechanism according to an embodiment of the present disclosure;

fig. 2 is a perspective exploded view of a steering column rotation limiting mechanism provided in an embodiment of the present disclosure;

fig. 3 is a schematic perspective view of a steering column rotation limiting mechanism provided in an embodiment of the present disclosure, in which a first end surface is shown abutting against a first limiting surface;

fig. 4 is a schematic perspective view of a steering column rotation limiting mechanism provided in the embodiment of the present disclosure, wherein a second end surface is shown abutting against a second limiting surface;

FIG. 5 is a schematic perspective view illustrating a sleeve of a steering column rotation limiting mechanism according to an embodiment of the present disclosure;

FIG. 6 is a schematic perspective view of a sleeve in a steering column rotation limiting mechanism according to another embodiment of the present disclosure;

fig. 7 is a schematic perspective view illustrating a limiting plate in a steering column rotation limiting mechanism according to an embodiment of the present disclosure;

FIG. 8 is a schematic perspective view of a bracket in a steering column rotation limiting mechanism provided in an embodiment of the present disclosure;

fig. 9 is a schematic perspective view illustrating a steering column rotation limiting mechanism mounted on a steering column according to an embodiment of the present disclosure.

Description of the reference numerals

1-steering shaft, 2-sleeve, 21-radial protrusion, 211-first end face, 212-second end face, 22-meshing teeth, 3-limiting plate, 31-first limiting part, 311-first limiting surface, 32-second limiting part, 321-second limiting surface, 33-rack, 34-sliding groove, 35-arc transition surface, 4-bracket, 41-sliding rail, 42-anti-falling protrusion and 100-steering column.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, the terms "inside" and "outside" are used in relation to the contour of the corresponding component itself, unless otherwise stated. Furthermore, the terms "first, second, etc. are used herein to distinguish one element from another, and are not necessarily order or importance. Furthermore, in the following description, when referring to the figures, the same reference numbers in different figures denote the same or similar elements, unless otherwise explained. The foregoing definitions are provided to illustrate and describe the present disclosure only and should not be construed to limit the present disclosure.

According to a specific embodiment of the present disclosure, there is provided a steering column rotation limiting mechanism, as shown in fig. 1 to 9, which includes a limiting plate 3 adapted to be disposed on a steering column 100 and a radial protrusion 21 for fixing on a steering shaft 1, the limiting plate 3 having a first limiting portion 31 and a second limiting portion 32, the first limiting portion 31 and the second limiting portion 32 being adapted to be disposed on different sides of the steering shaft 1 with respect to an axial direction and stop circumferential movement of the radial protrusion 21 on the corresponding sides to cooperatively define a maximum turning angle of the steering shaft 1.

Through the technical scheme, when the rotating angle of the steering shaft 1 in the first rotating direction reaches the limit value, the steering column rotation limiting mechanism stops the radial bulge 21 through the first limiting part 31, so that the axial shaft 1 is limited to continue rotating in the first rotating direction; when the angle of rotation of the steering shaft 1 in the second rotating direction reaches a limit value, the radial protrusion 21 is stopped by the second limiting portion 32, so that the steering shaft 1 is limited from further rotating in the second rotating direction, the first limiting portion 31 and the second limiting portion 32 cooperatively limit the maximum rotating angle of the axial shaft 1, and the rotating angle of the steering shaft is prevented from exceeding the limit positions of other steering moving parts in the steering column 100, so that the rotation and rotation limitation of the steering shaft 1 in the steering column 100 is reliably realized. The steering column rotation limiting mechanism provided by the disclosure is simple and reliable in structure, and the phenomenon that the limit position is blocked or the reversing torque is increased cannot occur.

In the specific embodiment that this disclosure provided, consider that the biggest turned angle of steering spindle 1 can be greater than 360, steering spindle 1 need rotate many rings promptly, therefore, limiting plate 3 can be for steering column 100 perpendicular to axial translation, and limiting plate 3 is connected with steering spindle 1 through the motion conversion structure, in order to drive the translational motion of limiting plate 3 through the rotation of steering spindle 1, thereby dodge steering spindle 1 when axial spindle 1 does not rotate to the extreme angle, backstop radial bulge 21 when steering spindle 1 rotates to the extreme position, thereby restrict steering spindle 1 further rotation.

Wherein the motion converting structure may be configured in any suitable manner. Alternatively, referring to fig. 1 to 4, the motion converting structure may include a meshing tooth 22 and a rack 33 that are engaged, the meshing tooth 22 being provided on the steering shaft 1, and the rack 33 being provided on the stopper plate 3. The movement of the stopper plate 3 can be always synchronized with the rotation of the steering shaft 1 by the engaging teeth 22 and the rack 33, which is advantageous in reducing or even eliminating the occurrence of abnormal noise due to impact.

When the steering column rotation limiting mechanism provided by the disclosure works, when the steering shaft 1 rotates along the first rotation direction, the meshing teeth 22 rotate along with the steering shaft 1, the meshing teeth 22 and the rack 33 are matched with each other to convert the rotation motion of the meshing teeth 22 into the linear motion of the rack 33, so that the limiting plate 3 translates leftwards (in the drawing surface direction of fig. 1), and when the rotation angle of the steering shaft 1 along the first rotation direction reaches a limit value, the translation of the limiting plate 3 enables the first limiting part 31 to be stopped at the radial bulge 21, so that the steering shaft 1 is limited to continue to rotate along the first rotation direction; when the steering shaft 1 rotates in the second rotation direction, the meshing teeth 22 rotate together with the rotation shaft, the meshing teeth 22 and the rack 33 are matched with each other to convert the rotation motion of the meshing teeth 22 into the linear motion of the rack 33, so that the limiting plate 3 translates rightward (in the drawing surface direction of fig. 1), and when the rotation angle of the steering shaft 1 in the second rotation direction reaches a limit value, the translation of the limiting plate 3 stops the second limiting portion 32 against the radial protrusion 21, so that the steering shaft 1 is limited from continuing to rotate in the second rotation direction.

The steering column rotation limiting mechanism provided by the present disclosure can directly limit the rotation of the steering shaft 1, in which case the meshing teeth 22 and the radial protrusions 21 in the steering column rotation limiting mechanism are fixed on the steering shaft 1. In addition, the steering column rotation limiting mechanism provided by the present disclosure can also be installed on a driving mechanism for driving the steering shaft 1 to rotate, so as to indirectly limit the rotation of the steering shaft 1.

In the specific embodiment provided by the present disclosure, in order to facilitate the setting of the limiting plate 3, the steering column rotation limiting mechanism includes a bracket 4 adapted to be fixed on the steering column 100 and having a length, the limiting plate 3 is slidably connected on the bracket 4, wherein the bracket 4 can constrain a translation path of the limiting plate 3, so that the limiting plate 3 translates perpendicular to the steering shaft 1, that is, along the length direction. Further, referring to fig. 9, the bracket 4 may also be integrally formed with the steering column body to effectively reduce the assembly time and at the same time reduce the assembly difficulty.

Wherein, can be constructed with guide structure between support 4 and the limiting plate 3 to guide limiting plate 3 perpendicular to axial translation, and restrict limiting plate 3 and be on a parallel with the removal of steering spindle 1, avoid limiting plate 3 to be on a parallel with the removal of steering spindle 1 and cause the meshing tooth 22 and set up rack 33 on limiting plate 3 and break away from the cooperation, lead to the rotatory stop gear of steering column to lose efficacy.

Wherein the guide structure may be configured in any suitable manner. In one embodiment, referring to fig. 1 to 4, the guiding structure may include a sliding groove 34 and a sliding rail 41 which are engaged with each other, the sliding groove 34 and the sliding rail 41 extend along a length direction, one of the sliding groove 34 and the sliding rail 41 is disposed on the bracket 4, and the other of the sliding groove 34 and the sliding rail 41 is disposed on the limiting plate 3. In the embodiment shown in fig. 1 to 4, the slide rail 41 is disposed on the bracket 4, and the sliding chute 34 is disposed on the limiting plate 3. In another embodiment (not shown), the guiding structure may include a guide rod and a guide hole, which are matched with each other, the guide rod and the guide hole extend along the length direction, the guide hole is disposed in the limiting plate 3, the guide rod is inserted into the guide hole, and two end portions of the guide rod respectively fix the bracket 4, the limiting plate 3 can move back and forth along the extending direction of the guide rod, so that the first limiting portion 31 or the second limiting portion 32 stops at the radial protrusion 21, and the steering shaft 1 is limited from continuing to rotate along the first rotating direction or the second rotating direction, so as to limit the rotation of the steering shaft 1.

In the specific embodiment provided by the present disclosure, the two end portions of the bracket 4 in the length direction are provided with the retaining protrusions 42, and are used for stopping the limiting plate 3 between the two retaining protrusions 42.

In an embodiment provided by the present disclosure, referring to fig. 5, the engaging teeth 22 may be configured to be arranged along a partial circumference of the steering shaft 1, in which case, the stopper plate 3 can be translated perpendicular to the steering shaft 1 only when the engaging teeth 22 are engaged with the rack 33, wherein, in order to prevent the stopper plate 3 from continuing to translate when the engaging teeth 22 are disengaged from the rack 33 due to inertia, a slip prevention member is provided between the stopper plate 3 and the bracket 4 to increase a friction force between the stopper plate 3 and the bracket 4, and prevent the stopper plate 3 from freely moving to cause a collision abnormal sound in a state where the engaging teeth 22 are not engaged with the rack 33. In addition, the translation stroke of the rack 33 is correspondingly reduced, so that the structure of the limit plate 3 can be more miniaturized, and the structure of the steering column rotation limit mechanism is more compact. The anti-slip means may be configured as an elastic rubber member, which may be attached to one of the limiting plate 3 and the bracket 4, and it should be explained here that the anti-slip means is not disposed to affect the back-and-forth translation of the limiting plate 3 on the bracket 4, and the interaction force between the meshing teeth 22 and the rack 33 is sufficient to make the limiting plate 3 slidable on the bracket 4. In another embodiment provided by the present disclosure, referring to fig. 6, the engaging teeth 22 may also be configured to be arranged along the entire circumference of the steering shaft 1, in which case, the length of the rack 33 and the engaging teeth 22 cooperating with each other and the stroke of the rack 33 capable of translating back and forth on the bracket 4 need to be increased according to the design of the engaging teeth 22 to ensure the normal torque transmission of the steering shaft 1. In this embodiment, since the engaging teeth 22 can always cooperate with the rack 33, the stopper plate 3 can be moved only when the steering shaft 1 is rotated, so that the abnormal noise of collision can be reduced or even eliminated, and in this case, the above-mentioned anti-slip member can be provided as required, and is not limited in this respect.

In the specific embodiment provided by the present disclosure, the steering column rotation limiting mechanism comprises a sleeve 2, a radial protrusion 21 and engaging teeth 22 are formed on the outer surface of the sleeve 2, and the sleeve 2 is coaxially and fixedly sleeved on the steering shaft 1. By integrating the toothing 22 and the radial projection 21 together with the sleeve 2, the assembly time can be effectively reduced and at the same time the assembly difficulty can be reduced.

The sleeve 2 can be fixed coaxially on the steering shaft 1 in any suitable manner. In one embodiment, the sleeve 2 may be interference fitted on the steering shaft 1, and the sleeve 2 can withstand a certain torque without relative rotation with the steering shaft 1. In some embodiments, the sleeve 2 may also be coaxially fixed to the steering shaft 1 by a key connection, a threaded connection, or the like, which is not particularly limited in this disclosure.

In the specific embodiment provided by the present disclosure, the first stopper portion 31 circumferentially stops the radial protrusion 21, and the second stopper portion 32 circumferentially stops the radial protrusion 21. The radial protrusion 21 circumferentially has a first end surface 211 and a second end surface 212 which are opposite to each other, the first limiting portion 31 has a first limiting surface 311 which is used for abutting against the first end surface 211, when the angle of the steering shaft 1 rotating along the first rotating direction reaches a limiting value, the first limiting surface 311 abuts against the first end surface 211 due to the translation of the limiting plate 3, so that the steering shaft 1 is limited from continuously rotating along the first rotating direction, the second limiting portion 32 has a second limiting surface 321 which is used for abutting against the second end surface 212, and when the angle of the steering shaft 1 rotating along the second rotating direction reaches the limiting value, the second limiting surface 321 abuts against the second end surface 212 due to the translation of the limiting plate 3, so that the steering shaft 1 is limited from continuously rotating along the second rotating direction.

Wherein, the first limiting portion 31 and the second limiting portion 32 may be both configured as a bump, and the two bumps may be formed with an arc-shaped transition surface 35 to avoid stress concentration.

On the basis of the technical scheme, the steering system is provided with the steering column rotation limiting mechanism, so that the steering system has the characteristics, and the repeated description is avoided.

On the basis of the technical scheme, the vehicle comprises the steering system, so that the vehicle also has the characteristics, and the repeated description is avoided.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (13)

1. The utility model provides a steering column rotation limiting mechanism, its characterized in that, steering column rotation limiting mechanism is including being suitable for setting up in limiting plate (3) of steering column (100) and being used for fixing radial protrusion (21) on steering shaft (1), limiting plate (3) have first spacing portion (31) and the spacing portion of second (32), first spacing portion (31) with the spacing portion of second (32) are suitable for setting up about the axial in the different sides of steering shaft (1) and at the corresponding side backstop the circumferential motion of radial protrusion (21) to mutually cooperate the maximum turned angle of injectting steering shaft (1).

2. The steering column rotation limiting mechanism according to claim 1, characterized in that the limiting plate (3) is capable of translating perpendicular to the axial direction relative to the steering column (100), and the limiting plate (3) is connected with the steering shaft (1) through a motion conversion structure so as to drive the limiting plate (3) to translate through the rotation of the steering shaft (1).

3. The steering column rotation limiting mechanism according to claim 2, wherein the motion conversion structure comprises a meshing tooth (22) and a rack (33) which are matched, the meshing tooth (22) is arranged on the steering shaft (1), and the rack (33) is arranged on the limiting plate (3).

4. The steering column rotation limitation mechanism according to claim 2, characterized in that it comprises a bracket (4) adapted to be fixed to the steering column (100), the limitation plate (3) being slidably connected to the bracket (4).

5. Steering column rotation limitation mechanism according to claim 4, characterized in that a guiding structure is configured between the bracket (4) and the limitation plate (3) to guide the limitation plate (3) to translate perpendicular to the axial direction.

6. The steering column rotation limiting mechanism according to claim 5, wherein the guide structure includes a slide groove (34) and a slide rail (41) that are fitted to each other, the slide groove (34) and the slide rail (41) extend in a direction perpendicular to the axial direction, one of the slide groove (34) and the slide rail (41) is provided to the bracket (4), and the other of the slide groove (34) and the slide rail (41) is provided to the stopper plate (3).

7. The steering column rotation limiting mechanism according to claim 4, wherein anti-dropping protrusions (42) are provided at both ends of the bracket (4) in the moving direction of the limiting plate (3), and are used for stopping the limiting plate (3) between the two anti-dropping protrusions (42).

8. Steering column rotation limitation mechanism according to claim 4, characterized in that a slip-proof element is arranged between the limitation plate (3) and the bracket (4).

9. The steering column rotation limitation mechanism according to claim 3, characterized in that it comprises a sleeve (2), said radial protrusion (21) and said meshing teeth (22) being formed on the outer surface of said sleeve (2), said sleeve (2) being coaxially fixed on said steering shaft (1).

10. Steering column rotation limitation mechanism according to claim 9, characterized in that the sleeve (2) is interference fitted on the steering shaft (1).

11. The steering column rotation limit mechanism according to claim 1, wherein the radial protrusion (21) has a first end surface (211) and a second end surface (212) that are opposite to each other in the circumferential direction, the first limit portion (31) has a first limit surface (311) for abutting against the first end surface (211), and the second limit portion (32) has a second limit surface (321) for abutting against the second end surface (212).

12. A steering system, characterized in that it is provided with a steering column rotation limitation mechanism according to any one of claims 1-11.

13. A vehicle characterized in that the vehicle comprises a steering system according to claim 12.

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