Steering column clearance compensation mechanism and steering system
By designing a gap compensation mechanism including elastic sheets in the electric power steering column, the problem of poor operation and noise caused by the worm gear and worm meshing time gap is solved, and lower wear and smoother transmission is achieved.
Patent Information
- Application Number
- CN202323613651.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2033-12-28
AI Technical Summary
There is a gap when the worm gear and worm in the traditional electric power steering column, resulting in problems such as unsmooth operation and noise.
A steering column gap compensation mechanism is designed. By providing an elastic sheet on the shell, one end of the elastic sheet bent and extends into the passage and installation port, and abuts with the side wall of the bearing to ensure that the bearing and the bearing seat are tight. fit to compensate for the clearance of the steering column.
Through the design of the elastic sheet, wear at the contact point of the worm gear and worm gear is reduced, meshing force is reduced, transmission smoothness is improved, and noise is reduced.
Smart Images
Figure CN222479413U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steering systems, in particular to a steering column clearance compensation mechanism and a steering system. Background Art
[0002] The worm gear clearance compensation mechanism of the electric power steering column is widely used in passenger cars. The internal structure of the electric power steering column not only involves high-precision mechanical transmission, but also requires a complex compensation mechanism to perform clearance compensation when the worm gear is engaged to prevent problems such as increased meshing clearance caused by wear, unsmooth operation, noise, etc.
[0003] If there is no clearance compensation mechanism, the center distance will be reduced and the meshing force will be increased to make the worm gear meshing more firmly. However, this large force will cause the contact part of the worm gear to wear more seriously and shorten its service life. Therefore, a worm gear for an electric power steering column is needed.
[0004] The clearance compensation mechanism of the rod performs clearance compensation when the worm gear is meshing, which can greatly reduce the contact force at the worm gear, thereby reducing the wear at the contact point of the worm gear and making the transmission smoother. Utility Model Content
[0005] The utility model provides a steering column clearance compensation mechanism and a steering system, aiming to solve the problems of uneven operation and noise caused by clearance when a worm gear is meshed in the traditional technology.
[0006] In order to solve the above problems, the utility model provides a steering column clearance compensation mechanism, comprising:
[0007] A housing, wherein the housing has a worm cavity, one end of the housing is provided with an opening communicating with the worm cavity, and one side of the housing is also provided with a through port communicating with the worm cavity;
[0008] A bearing seat is arranged at the opening, and a mounting opening is arranged on the bearing seat, and the mounting opening is arranged opposite to the through opening;
[0009] A bearing, disposed in the bearing seat;
[0010] A worm is disposed in the worm cavity, and an end of the worm is sleeved in the bearing; and
[0011] An elastic sheet is arranged on the housing, one end of which is bent and extends into the through opening and the mounting opening in sequence, and abuts against the side wall of the bearing.
[0012] According to a steering column clearance compensation mechanism provided by the utility model, the bending angle of the elastic sheet is 70-100°.
[0013] According to a steering column clearance compensation mechanism provided by the utility model, a rubber ring is provided at the through opening or the installation opening, and the rubber ring is arranged to wrap the circumference of the elastic sheet.
[0014] According to a steering column clearance compensation mechanism provided by the utility model, a mounting hole is provided at one end of the elastic sheet, a bolt is provided on the shell, and the bolt is passed through the mounting hole so that the elastic sheet and the shell are detachably connected.
[0015] According to a steering column clearance compensation mechanism provided by the utility model, the opening and the through port extend along the height direction of the shell, one end of the elastic sheet is provided with a plurality of mounting holes, each of the mounting holes is arranged at intervals and is used to cooperate with bolts to fix the elastic sheet to the shell.
[0016] According to a steering column clearance compensation mechanism provided by the utility model, the side wall of the bearing seat is further provided with rubber, and the rubber is used to abut against the inner wall of the shell.
[0017] According to a steering column clearance compensation mechanism provided by the utility model, a plurality of rubber strips are provided on the side wall of the bearing seat, and each of the rubber strips extends along the circumference of the bearing seat and is arranged at intervals along the height direction of the bearing seat.
[0018] According to a steering column clearance compensation mechanism provided by the utility model, the bearing seat is semi-enclosed, and a side of the bearing seat away from the installation opening has a deformed opening.
[0019] According to the steering column clearance compensation mechanism provided by the utility model, a cover plate is also provided at the opening.
[0020] The utility model also provides a steering system, comprising the steering column clearance compensation mechanism as described in any one of the above items.
[0021] The steering column clearance compensation mechanism provided by the utility model can make the bearing and the bearing seat fit tightly by arranging an elastic sheet, and then compensate the clearance of the steering column and ensure the meshing tightness of the worm wheel and the worm. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0023] Figure 1It is a three-dimensional structural schematic diagram of the steering column clearance compensation mechanism provided by the utility model;
[0024] Figure 2 yes Figure 1 A cross-sectional structural diagram of ;
[0025] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle bearing seat;
[0026] Figure 4 yes Figure 1 Schematic diagram of the structure of the elastic sheet.
[0027] Figure numerals: 10: steering column clearance compensation mechanism; 1: housing; 11: worm gear chamber seat; 12: opening; 13: cover plate; 14: through port; 2: bearing seat; 21: rubber strip; 22: deformation opening; 23: mounting port; 3: bearing; 4: worm gear; 5: elastic sheet; 51: mounting hole. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are 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.
[0029] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0030] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.
[0031] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0032] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0033] Combine the following Figure 1-Figure 4 The steering column clearance compensation mechanism 10 and the steering system of the present invention are described.
[0034] In view of the gap between the worm gear and the gear in the traditional technology, which leads to problems such as unsmooth operation and noise, in order to solve the above problems, please refer to Figure 1-Figure 4 The utility model provides a steering column clearance compensation mechanism 10, comprising:
[0035] The housing 1 has a worm cavity 11 therein, and an opening 12 communicating with the worm cavity 11 is provided at one end of the housing 1, and a cover plate 13 is also provided at the opening 12 to protect the mechanism in the worm cavity 11. A through port 14 communicating with the worm cavity 11 is also provided at one side of the housing 1; a bearing seat 2 is provided at the opening 12, and a mounting port 23 is provided on the bearing seat 2, and the mounting port 23 is arranged opposite to the through port 14; a bearing 3 is provided in the bearing seat 2; a worm 4 is provided in the worm cavity 11, and an end of the worm 4 is sleeved in the bearing 3; an elastic sheet 5 is provided on the housing 1, and one end of the elastic sheet 5 is bent and extends into the through port 14 and the mounting port 23 in sequence, and abuts against the side wall of the bearing 3. The steering column clearance compensation mechanism 10 provided by the utility model is configured with an elastic sheet 5, one end of which abuts against the bearing 3, so that the bearing 3 and the bearing seat 2 can be tightly fitted, thereby compensating for the clearance of the steering column and ensuring the tightness of the meshing between the worm wheel and the worm 4.
[0036] Specifically, the elastic sheet 5 needs to provide a force directed toward the turbine so that the bearing 3 can fit tightly with the bearing seat 2. The angle between the force and the horizontal line can be 70-100°, within which a relatively tight abutment can be ensured. In this embodiment, preferably, the end of the elastic sheet 5 is bent 90 degrees.
[0037] Furthermore, in order to ensure that the elastic sheet 5 can have a stable contact effect with the bearing 3, in the technical solution provided by the utility model, a rubber ring is provided at the through port 14 or the mounting port 23, and the rubber ring is provided to wrap the circumference of the elastic sheet 5. On the one hand, the rubber ring can seal the through port 14 and the mounting port 23, and on the other hand, it can also wrap the elastic sheet 5 so that the elastic sheet 5 will not shake or detach. It should be noted that the rubber ring may not be provided, and only two rubber sheets may be provided at the through port 14 and the mounting port 23, and the two rubber sheets may squeeze the two sides of the elastic sheet 5 to play a certain fixing role on the elastic sheet 5, and the utility model does not limit this.
[0038] In order to facilitate the installation of the elastic sheet 5 on the housing 1 , a mounting hole 51 is provided at one end of the elastic sheet 5 , and a bolt is provided on the housing 1 , and the bolt passes through the mounting hole 51 , so that the elastic sheet and the housing 1 can be detachably connected.
[0039] In other optional embodiments, the opening 12 and the through hole 14 extend in the height direction of the housing 1, and a plurality of mounting holes 51 are provided at one end of the elastic sheet 5, and the mounting holes 51 are arranged at intervals, and are used to cooperate with bolts to fix the elastic sheet 5 to the housing 1. By selecting different mounting holes 51, the installation orientation of the elastic sheet 5 can be selected, thereby selecting the abutment position between the elastic sheet 5 and the bearing 3, which is more flexible.
[0040] It should be noted that a mounting platform is convexly provided on the inner wall of the housing 1, and the bearing seat 2 is arranged on the mounting platform. In order to ensure the stability of the installation of the bearing seat 2, the side wall of the bearing seat 2 is also provided with rubber, and the rubber is used to abut against the inner wall of the housing 1. On the one hand, it can make the contact between the bearing seat 2 and the housing 1 closer, and on the other hand, it can also absorb noise through the rubber. In an optional embodiment, rubber blocks, rubber strips 21, etc. can be provided. In the technical solution provided by the utility model, the side wall of the bearing seat 2 is provided with a plurality of rubber strips 21, and each rubber strip 21 extends along the circumference of the bearing seat 2 and is arranged at intervals along the height direction of the bearing seat 2, so that the bearing seat 2 can be installed and noise can be absorbed in all directions.
[0041] Furthermore, the bearing seat 2 is semi-enclosed, and a side of the bearing seat 2 away from the mounting opening 23 has a deformation opening 22. In an optional embodiment, the bearing seat 2 is an integral plastic injection molding arrangement, and the deformation opening 22 can provide a deformation space to prevent the bearing seat 2 from being loosely mounted with the housing 1 after deformation.
[0042] The utility model further provides a steering system, including a steering column clearance compensation mechanism 10. Since the main improvement of the utility model is in the steering column clearance compensation mechanism 10, the structure of the steering system will not be described in detail.
[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A steering column clearance compensation mechanism, characterized in that: include: A housing, wherein the housing has a worm cavity, one end of the housing is provided with an opening communicating with the worm cavity, and one side of the housing is also provided with a through port communicating with the worm cavity; A bearing seat is arranged at the opening, and a mounting opening is arranged on the bearing seat, and the mounting opening is arranged opposite to the through opening; A bearing, disposed in the bearing seat; A worm is disposed in the worm cavity, and an end of the worm is sleeved in the bearing; and An elastic sheet is arranged on the housing, one end of which is bent and extends into the through opening and the mounting opening in sequence, and abuts against the side wall of the bearing.
2. The steering column clearance compensation mechanism according to claim 1, characterized in that: The bending angle of the elastic sheet is 70-100°.
3. The steering column clearance compensation mechanism according to claim 1, characterized in that: A rubber ring is provided at the through opening or the installation opening, and the rubber ring is arranged to wrap around the circumference of the elastic sheet.
4. The steering column clearance compensation mechanism according to claim 3, characterized in that: One end of the elastic sheet is provided with a mounting hole, and the shell is provided with a bolt, and the bolt is passed through the mounting hole, so that the elastic sheet and the shell are detachably connected.
5. The steering column clearance compensation mechanism according to claim 1, characterized in that: The opening and the through hole extend along the height direction of the shell. One end of the elastic sheet is provided with a plurality of mounting holes, and the mounting holes are arranged at intervals and are used to cooperate with bolts to fix the elastic sheet to the shell.
6. The steering column clearance compensation mechanism according to claim 1, characterized in that: The side wall of the bearing seat is also provided with rubber, and the rubber is used to abut against the inner wall of the shell.
7. The steering column clearance compensation mechanism according to claim 6, characterized in that: The side wall of the bearing seat is provided with a plurality of rubber strips, each of which extends along the circumference of the bearing seat and is arranged at intervals along the height direction of the bearing seat.
8. The steering column clearance compensation mechanism according to claim 1, characterized in that: The bearing seat is semi-enclosed, and a side of the bearing seat away from the mounting opening has a deformed opening.
9. The steering column clearance compensation mechanism according to claim 1, characterized in that: A cover plate is also provided at the opening.
10. A steering system, characterized in that: It comprises a steering column clearance compensation mechanism as described in any one of claims 1-9.