Limiting device for adjusting rotation angle of steering system

Abstract

The utility model discloses a limiting device with an adjustable rotation angle for a steering system, which comprises an output shaft rotationally arranged in a shell, a threaded shaft sleeve arranged on the output shaft, a limiting ring in threaded connection with the threaded shaft sleeve, and a guide frame capable of limiting the circumferential rotation of the limiting ring, a first check ring and a second check ring are fixedly arranged at the positions, located at the two ends of the threaded shaft sleeve, of the output shaft in a sleeving mode correspondingly, and circumferential limiting structures are arranged between the first check ring and the output shaft and between the second check ring and the output shaft; the limiting ring is provided with a limiting protrusion, the first stop ring is provided with a stop protrusion, the second stop ring and the first stop ring are the same in structure, and when the limiting ring axially moves to be close to the first stop ring or the second stop ring, the stop protrusion is attached to the limiting protrusion in a rotating mode. The utility model has the advantages of adjustable rotation angle, convenient disassembly and assembly, simple structure, low processing cost, stable and reliable operation and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile steering systems, in particular to a limiting device with adjustable rotation angle for a steering system. Background Art

[0002] With the development of automotive electronic technology, wire-controlled steering has become a development trend. Compared with the traditional steering system, the wire-controlled steering cancels the intermediate shaft connection between the steering gear and the steering gear, and the mechanical limit of the steering gear cannot be transmitted to the wire-controlled steering; therefore, an angle limit mechanism needs to be set in the wire-controlled steering system to control the number of turns of the steering wheel; Patent publication number CN116279749A discloses a mechanical limit device for a wire-controlled steering column, which specifically discloses a sleeve fixed on the input shaft, and the sleeve is threadedly connected to a limit nut; a guide block is provided on the outer wall of the limit nut, and a nut axial sliding guide groove is provided in the sleeve housing; a first limit portion and a second limit portion are respectively provided at both ends of the sleeve; although the function of rotation limit is realized, there are problems such as inconvenient disassembly and assembly, complex structure, high processing cost, and no function of adjustable rotation angle. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a limiting device for a steering system with adjustable rotation angle, which is easy to disassemble and assemble, has a simple structure, low processing cost, stable and reliable operation, has the function of adjustable rotation angle, is flexible and convenient to use, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a limit device for a steering system with adjustable rotation angle, comprising an output shaft rotatably arranged in a shell, a threaded sleeve being arranged on the output shaft, a limit ring being threadedly connected to the threaded sleeve, a guide frame being further provided on the shell for limiting the circumferential rotation of the limit ring, a stop ring 1 and a stop ring 2 being fixedly arranged at both ends of the threaded sleeve on the output shaft, a circumferential limit structure being arranged between the stop ring 1 and the stop ring 2 and the output shaft; a limit protrusion being arranged on the limit ring, a stop protrusion being arranged on the stop ring 1, and the stop ring 2 and the stop ring 1 having the same structure, and when the limit ring moves axially close to the stop ring 1 or the stop ring 2, the stop protrusion rotates and fits with the limit protrusion.

[0005] Furthermore, the circumferential limiting structure provided between the stop ring 1 and the stop ring 2 and the output shaft is a spline matching structure.

[0006] Furthermore, a spline tooth is provided on the circumferential outer wall of the output shaft, and a spline groove 1 matched with the spline tooth is provided on the circumferential inner wall of the stop ring 1.

[0007] Furthermore, a second spline groove matched with the spline teeth is provided on the circumferential inner wall of the threaded sleeve, and the threaded sleeve forms a spline connection structure with the spline teeth on the output shaft through the second spline groove.

[0008] Furthermore, the output shaft is a hollow stepped shaft structure, the convex shaft of the output shaft is a limiting shaft, and the spline teeth are arranged on the limiting shaft of the output shaft; the second stop ring, the threaded sleeve and the first stop ring are nested in sequence on the limiting shaft along the spline teeth, the second stop ring, the threaded sleeve and the first stop ring fit together, and the inner end face of the second stop ring fits with the shoulder of the output shaft; an external thread is provided on the circumferential outer wall of the outer end of the limiting shaft, and a locking nut is threadedly connected to the external thread of the limiting shaft.

[0009] Furthermore, a guide boss is provided on the circumferential outer wall of the limiting ring, the guide frame is a U-shaped plate structure, and the opening direction of the guide frame is parallel to the axial direction of the limiting ring, and the guide boss of the limiting ring is slidably nested in the opening groove of the guide frame.

[0010] Furthermore, the limiting protrusions include protrusions provided on the circumferential end surfaces on both sides of the limiting ring.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the output shaft drives the limit ring to move axially, and the stop ring 1 and the stop ring 2 rotate synchronously with the output shaft. When the limit ring moves axially close to the stop ring 1 or the stop ring 2, the stop protrusion and the convex block of the limit protrusion rotate and fit together, thereby realizing the function of rotation angle limiting; the limit stroke of the axial movement of the limit ring can be changed by adjusting the relative angle between the stop ring 1 and the stop ring 2 and the output shaft, thereby realizing the function of adjustable rotation angle; and the threaded sleeve, the stop ring 1 and the stop ring 2 in the limit device are all connected with the output shaft spline and are locked by a locking nut. The limit device is easy to disassemble and assemble, has a simple structure, low processing cost, and stable and reliable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the sliding cooperation structure between the limit ring and the guide frame of the utility model;

[0014] Figure 3 This is an axonometric diagram of the limit device of the utility model;

[0015] Figure 4 This is an exploded diagram of the limit device of the utility model;

[0016] Figure 5 This is a schematic diagram of the structure of the limit ring of the utility model;

[0017] Figure 6 This is a schematic diagram of the output shaft structure of the utility model;

[0018] Figure 7 It is a cross-sectional view of the limiting device of the utility model.

[0019] In the figure: 1. housing; 2. output shaft; 21. limit shaft; 211. spline teeth; 22. shaft shoulder; 23. external thread; 3. threaded sleeve; 4. limit ring; 41. guide boss; 42. limit protrusion; 421. bump; 5. guide frame; 6. stop ring 1; 61. stop protrusion; 7. stop ring 2; 8. locking nut. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0021] See also Figure 1-7 The utility model provides a technical solution: a limit device for a steering system with adjustable rotation angle, comprising an output shaft 2 rotatably arranged in a housing 1, a threaded sleeve 3 being arranged on the output shaft 2, a limit ring 4 being threadedly connected on the threaded sleeve 3, and a stop ring 1 6 and a stop ring 2 7 being fixedly sleeved at both ends of the threaded sleeve 3 on the output shaft 2;

[0022] The output shaft 2 is a hollow stepped shaft structure, the convex shaft of the output shaft 2 is a limit shaft 21, and a spline tooth 211 is provided on the circumferential outer wall of the limit shaft 21; a spline groove 1 adapted to the spline tooth 211 is provided on the circumferential inner wall of the stop ring 1 6; a circumferential limit structure is formed between the stop ring 1 6 and the stop ring 2 7 and the output shaft 2;

[0023] The circumferential inner wall of the threaded sleeve 3 is provided with a spline groove 2 that matches the spline teeth 211, and the threaded sleeve 3 forms a spline connection structure with the spline teeth 211 on the output shaft 2 through the spline groove 2; the stop ring 27, the threaded sleeve 3 and the stop ring 16 are sequentially nested on the limit shaft 21 along the spline teeth 211, and the stop ring 27, the threaded sleeve 3 and the stop ring 16 fit each other, and the inner end face of the stop ring 27 fits with the shoulder 22 of the output shaft 2; the circumferential outer wall of the outer end of the limit shaft 21 is provided with an external thread 23, and a locking nut 8 is threadedly connected to the external thread 23 of the limit shaft 21;

[0024] The limiting ring 4 is provided with a limiting protrusion 42, and the limiting protrusion 42 includes a protrusion 421 provided on the circumferential end surfaces of both sides of the limiting ring 4; the stop ring 1 6 is provided with a stopping protrusion 61, and the stop ring 2 7 and the stop ring 1 6 have the same structure;

[0025] The housing 1 is also provided with a guide frame 5 which can limit the circumferential rotation of the limit ring 4. A guide boss 41 is provided on the circumferential outer wall of the limit ring 4. The guide frame 5 is a U-shaped plate structure, and the opening direction of the guide frame 5 is parallel to the axial direction of the limit ring 4. The guide boss 41 of the limit ring 4 is slidably nested in the opening groove of the guide frame 5.

[0026] Working principle:

[0027] When the steering wheel rotates in one direction, the output shaft 2 rotates accordingly, and the threaded sleeve 3, the stop ring 1 6 and the stop ring 2 7 rotate synchronously with the output shaft 2, and the stop protrusions 61 on the stop ring 1 6 and the stop ring 2 7 also rotate synchronously with the output shaft 2. Since the guide boss 41 of the limit ring 4 is slidably nested in the open groove of the guide frame 5, the guide frame 5 limits the circumferential rotation of the limit ring 4. When the threaded sleeve 3 rotates, the limit ring 4 can only move in the axial direction; when the limit ring 4 moves axially and approaches the stop ring 1 6 or the stop ring 2 7, the stop protrusion 61 rotates and fits with the convex block 421 of the limit protrusion 42, thereby limiting the continued rotation of the steering wheel and the output shaft 2;

[0028] When the rotation angle of the steering wheel needs to be adjusted, remove the locking nut 8, take out the stop ring 1 6 and the stop ring 2 7, adjust the relative angle between the stop ring 1 6 and the stop ring 2 7 and the output shaft 2, and reinstall them, thereby changing the limit stroke of the axial movement of the limit ring 4 to achieve the rotation angle adjustment of the steering wheel;

[0029] The present embodiment discloses a limit device for a steering system with an adjustable rotation angle, wherein the output shaft 2 drives the limit ring 4 to move axially, and the stop ring 1 6 and the stop ring 2 7 rotate synchronously with the output shaft 2. When the limit ring 4 moves axially close to the stop ring 1 6 or the stop ring 2 7, the stop protrusion 61 rotates and fits with the protrusion 421 of the limit protrusion 42, thereby realizing the function of rotation angle limiting. The limit stroke of the axial movement of the limit ring 4 can be changed by adjusting the relative angle between the stop ring 1 6 and the stop ring 2 7 and the output shaft 2, thereby realizing the function of adjustable rotation angle. The threaded sleeve 3, the stop ring 1 6 and the stop ring 2 7 in the limit device are all spline-connected to the output shaft 2 and are locked by a locking nut 8. The limit device is easy to disassemble and assemble, has a simple structure, low processing cost, and stable and reliable operation.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A limit device for a steering system with adjustable rotation angle, comprising an output shaft rotatably arranged in a housing, a threaded sleeve arranged on the output shaft, a limit ring threadedly connected to the threaded sleeve, and a guide frame for limiting the circumferential rotation of the limit ring arranged on the housing, characterized in that: A stop ring 1 and a stop ring 2 are fixedly provided at both ends of the threaded sleeve on the output shaft, and a circumferential limiting structure is provided between the stop ring 1, the stop ring 2 and the output shaft; a limiting protrusion is provided on the limiting ring, and a stopping protrusion is provided on the stop ring 1, and the structure of the stop ring 2 and the stop ring 1 is the same, and when the limiting ring moves axially close to the stop ring 1 or the stop ring 2, the stopping protrusion rotates and fits with the limiting protrusion.

2. A limiting device for a steering system with adjustable rotation angle according to claim 1, characterized in that: The circumferential limiting structure provided between the stop ring 1 and the stop ring 2 and the output shaft is a spline matching structure.

3. A limiting device for a steering system with adjustable rotation angle according to claim 2, characterized in that: The circumferential outer wall of the output shaft is provided with spline teeth, and the circumferential inner wall of the stop ring 1 is provided with a spline groove 1 matched with the spline teeth.

4. A limiting device for a steering system with adjustable rotation angle according to claim 3, characterized in that: A second spline groove matched with the spline teeth is arranged on the circumferential inner wall of the threaded sleeve, and the threaded sleeve forms a spline connection structure with the spline teeth on the output shaft through the second spline groove.

5. A limiting device for a steering system with adjustable rotation angle according to claim 4, characterized in that: The output shaft is a hollow stepped shaft structure, the convex shaft of the output shaft is the limit shaft, and the spline teeth are arranged on the limit shaft of the output shaft; the second stop ring, the threaded sleeve and the first stop ring are nested on the limit shaft in sequence along the spline teeth, the second stop ring, the threaded sleeve and the first stop ring fit each other, and the inner end face of the second stop ring fits the shoulder of the output shaft; an external thread is provided on the circumferential outer wall of the outer end of the limit shaft, and a locking nut is threadedly connected to the external thread of the limit shaft.

6. According to claim 1, a limit device with adjustable rotation angle for a steering system, a guide boss is provided on the circumferential outer wall of the limit ring, the guide frame is a U-shaped plate structure, and the opening direction of the guide frame is parallel to the axial direction of the limit ring, and the guide boss of the limit ring is slidably nested in the opening groove of the guide frame.

7. A limiting device with adjustable rotation angle for a steering system according to claim 1, wherein the limiting protrusion comprises protrusions provided on both sides of the circumferential end surfaces of the limiting ring.

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