CN219749925U - Be applied to rotation limit structure that drive-by-wire turned to - Google Patents
Be applied to rotation limit structure that drive-by-wire turned to Download PDFInfo
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- CN219749925U CN219749925U CN202320504907.6U CN202320504907U CN219749925U CN 219749925 U CN219749925 U CN 219749925U CN 202320504907 U CN202320504907 U CN 202320504907U CN 219749925 U CN219749925 U CN 219749925U
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- 239000000463 material Substances 0.000 claims description 5
- 238000013016 damping Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 3
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Steering Control In Accordance With Driving Conditions (AREA)
Abstract
The utility model discloses a rotation limiting structure applied to steer-by-wire, belongs to the technical field of steer-by-wire, and aims to solve the problems that an existing rotation limiting mode is large in structural space occupation, inconvenient to install, and has overload risk in a steering system. Comprises a steering shaft, a rotating block, a follow-up block, a positioning block and a shell; the steering shaft is fixed on the shell by a bearing; the rotating block and the follow-up block are both positioned in the shell, and are axially and sequentially arranged outside the steering shaft; the rotating block is fixed on the rotating shaft through the pressing and fastening of the hexagonal nut, a flat key is arranged between the rotating block and the steering shaft, and a limiting block is arranged at the top end of the rotating block. The structure drives the follower block to rotate through synchronous rotation of the steering shaft and the rotating block, and finally the follower block contacts with the shell, so that the relative movement between the steering shaft and the shell is limited, and meanwhile, the maximum torque absorbed by the steering system is increased due to the change of the limiting structure of the steering block; the lightweight design of the steer-by-wire rotation limiting mechanism is realized.
Description
Technical Field
The utility model relates to the technical field of steer-by-wire, in particular to a rotation limiting structure applied to steer-by-wire.
Background
Based on the rapid development of the automobile steering industry, steer-by-wire is increasingly applied in automobile products, and because there is no mechanical connection between the steering column and the steering engine, unlimited rotation of the steering wheel in one direction may result, whereby the components of the steering device are at risk of overload or damage, and in addition, feedback about the maximum achievable steering angle of the wheels is also required for the driver.
The prior art comprises the following steps: 1. the motor is limited and directly connected, and the scheme has high response requirement on the motor, high power requirement on the motor and is unfavorable for the arrangement of the whole scheme; 2. the gear transmission limit, the large space of the station position of the scheme, the problem of processing precision of gears and the like can also cause abnormal sound, and meanwhile, the meshing speed of the gears has great influence on steering handfeel; 3. the ball screw nut is limited, and the scheme has a complex structure and high cost; 4. the limiting sleeve is wrapped layer by layer to limit, so that the radial space of the steering shaft is occupied, and the arrangement of the whole vehicle is influenced.
Publication number CN216783620U discloses a rotation limiting structure applied to steer-by-wire, comprising a steering wheel, a steering shaft, a shell, a rotator, a follower and a limiter, wherein the steering wheel is fixedly connected with the steering shaft, the steering shaft penetrates through the upper end face and the lower end face of the shell, and bearings are arranged at the joints; the rotator, the follower and the limiting body are positioned in the shell and sequentially axially arranged outside the steering shaft relative to the steering wheel; the rotating body is fixedly connected with the steering shaft, and a limiting block is arranged on the rotating body and pushes a limiting surface of the follower; the follower is connected with the steering shaft through a bearing, and a limiting block is arranged on the follower and is stopped on a limiting surface of the limiting body; the side wall of the outer ring of the limiting body is fixedly connected with the inner wall of the shell, and the inner ring of the limiting body is suspended relative to the steering shaft, so that the steering wheel drives the steering shaft and the rotating body to rotate, and the limiting body is in limiting contact with the limiting body after being contacted with the follower body to rotate for a certain angle, so that the rotation limiting of the steering wheel is realized. The structure adopts a rotation limiting mode, and the mode has the problems of large space occupation, production and installation inconvenience, overload risk of a steering system and the like.
Disclosure of Invention
In view of the above-mentioned technical shortcomings, an object of the present utility model is to provide a rotation limiting structure for steer-by-wire, which adopts a rotation limiting manner, so that a steering device can absorb and transmit a larger torque at a stop position, and is lighter.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a steering limit structure which is characterized by comprising a steering shaft, a rotating block, a follow-up block, a positioning block and a shell; the steering shaft is fixed on the shell by a bearing I; the rotating block and the follow-up block are both positioned in the shell, and are axially and sequentially arranged outside the steering shaft;
the rotating block is fixedly pressed on the rotating shaft through a hexagonal nut, a flat key is arranged between the rotating block and the steering shaft, a limiting block is arranged at the top end of the rotating block, and the limiting block pushes the limiting surface at the top end of the follow-up block to rotate;
the follow-up block is arranged on the steering shaft through a second bearing, a limiting block is also arranged at the top end of the follow-up block, and the limiting block contacts with a shell limiting block on the inner wall of the shell to prevent the steering shaft from rotating; the following blocks and the rotating blocks are separated by the positioning blocks.
Further, the axis of the steering shaft is coaxial with the axes of the rotating block, the follow-up block and the shell limiting block.
Further, the rotating block and the follow-up block are fixed on the steering shaft or the shell by adopting rolling bearings or sliding bearings.
Further, the rotating block, the follow-up block and the shell limiting block adopt any protruding structures to set up limit surface structures of different rotating blocks, follow-up blocks and shell limiting blocks according to requirements.
Further, the follow-up blocks are arranged in a plurality, and the limit requirement of more than 360 degrees is met by adopting the plurality of follow-up blocks according to the angle requirement of the steer-by-wire simulation.
Further, the contact surfaces among the limiting blocks of the rotating block and the follow-up block and the limiting surface adopt rubber materials for damping, so that noise generated by collision is reduced.
Further, the steering shaft is fixed with the follower block through a flat key, a spline or a conical surface structure.
The utility model has the beneficial effects that: the structure drives the follower block to rotate through synchronous rotation of the steering shaft and the rotating block, and finally contacts with the shell, so that the relative movement between the steering shaft and the shell is limited; compared with the prior art with the publication No. CN21678360U, the structure of the limiting block is changed, and the maximum torque which can be absorbed by the steering system is increased; meanwhile, compared with different shell structures, the steering limit system can adopt different follow-up block combined structures, so that the flexibility of the system is improved; meanwhile, compared with the design of the publication number CN21678360U, the structure realizes the light weight design of the steering-by-wire rotary limiting mechanism, and is convenient for maintenance, use and mass production.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a cross-sectional view of a rotation limiting structure applied to steer-by-wire according to embodiment 1 of the present utility model;
fig. 2 is a schematic structural diagram of a rotation limiting structure applied to steer-by-wire according to embodiment 1 of the present utility model;
fig. 3 is a schematic diagram of the internal structure of a housing of a rotation limiting structure applied to steer-by-wire according to embodiment 1 of the present utility model;
fig. 4 is a schematic illustration of a stop of a rotation limiting structure applied to steer-by-wire according to embodiment 1 of the present utility model;
fig. 5 is a schematic structural diagram of a rotation limiting structure turning block applied to steer-by-wire according to embodiment 1 of the present utility model;
fig. 6 is a schematic structural diagram of a rotation limiting structure follower block applied to steer-by-wire according to embodiment 1 of the present utility model;
fig. 7 is a schematic cross-sectional structure diagram of a rotation limiting structure for steer-by-wire according to embodiment 2 of the present utility model using different fasteners
Reference numerals illustrate: the steering device comprises a 1-shell, a 2-steering shaft, a 4-first bearing, a 5-shell limiting block, a 6-rubber ring, a 7-rotating block, an 8-following block, a 9-second bearing, an 11-positioning block, a 12-flat key, a 13-hexagonal nut and a 14-positioning ring.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
As shown in fig. 1-6, a rotation limiting structure applied to steer-by-wire comprises a steering shaft 2, a rotating block 7, a follower block 8, a positioning block 11 and a shell 1; the steering shaft 2 is fixed on the shell 1 by a bearing 4; the rotating block 7 and the follower block 8 are both positioned in the shell 1, and the rotating block 7 and the follower block 8 are axially and sequentially arranged outside the steering shaft 2; the tail end of the rotating block 7 is provided with a hexagonal nut 13 for pressing the whole steering limiting mechanism so that the rotating block 7 and the steering shaft 2 synchronously rotate; a flat key 12 is arranged between the rotating block 7 and the steering shaft 2, so that synchronous movement between the rotating block 7 and the steering shaft 2 is ensured; a limiting block is arranged at the top end of the rotating block 7 and pushes the limiting surface at the top end of the follow-up block 8 to rotate;
the follow-up block 8 realizes radial positioning on the steering shaft 2 through a second bearing 9, and the same limit block at the top end of the follow-up block 8 is contacted with the shell limit block 5 to stop the whole system, and the follow-up block 8, the rotating block 7 and the follow-up block 8 are separated by a positioning block 11.
The axis of the steering shaft 2 is coaxial with the axes of the rotating block 7, the follower block 8 and the shell limiting block 5.
The rotating block 7 and the follower block 8 are fixed on the steering shaft 2 or the shell 1 by adopting rolling bearings or sliding bearings.
The rotating block 7, the follow-up block 8 and the shell limiting block 5 adopt any protruding structures to set limit surface structures of different rotating blocks 7, follow-up blocks 8 and shell limiting blocks 5 according to requirements.
The ends of the turning block 7 and the follower block 8 are not limited to being fixed by nuts or the like.
The follow-up blocks 8 are arranged in a plurality, and the limit requirement of more than 360 degrees is met by adopting the plurality of follow-up blocks 8 according to the angle requirement of the steer-by-wire simulation.
The contact surfaces between the limiting blocks and the limiting surfaces of the rotating block 7 and the follow-up block 8 are made of rubber materials for damping, so that noise generated by collision is reduced. When the steering system stops operating, the position of the follower block 8 is random on the steering shaft 2.
Working principle:
the steering shaft 2 is connected with a steering wheel; the steering shaft 2 rotates to drive the rotating block 7 to rotate relative to the shell 1, relative movement exists among the rotating block 7, the follow-up block 8 and the shell 1, after the rotating block rotates to a certain angle, the limiting block on the rotating block 7 drives the follow-up block 8 to synchronously move, the limiting block on the follow-up block 8 collides with the shell limiting block 5, and all the follow-up blocks 8 are abutted against the limiting surface of the outer shell 1 so as to mechanically limit the relative movement of the steering shaft 2 relative to the shell 1.
The number of the follow-up blocks 8 can be set to be a plurality according to the limited angle, so that secondary follow-up or multistage follow-up is realized, and the limited angle is sequentially changed;
the limit of +/-1.5 circles can be realized by utilizing the rotating block 7, the three-stage follow-up block 8 and the shell limit block 5 when the rotating limit is realized for a common passenger car, and the limit rotating angle can be specified by a customer, so that the customer requirement can be met by increasing or reducing the number of the follow-up blocks 8 or changing the angle of the shell limit block 5.
Example 2
The rotation limiting structure applied to steer-by-wire shown in fig. 7 comprises a steering shaft 2, a rotating block 7, a follower block 8, a positioning block 11, a shell 1 and a hexagonal nut 13; the steering shaft 2 is fixed on the shell 1 by utilizing the bearing 4, the rotating block 7 and the follow-up block 8 are sequentially fixed on the outer side of the steering shaft 2, a limiting block is arranged at the top end of the rotating block 7, the limiting block pushes the limiting surface at the top end of the follow-up block 8 to rotate, the limiting blocks at the top ends among the follow-up blocks 8 are pushed mutually, and finally the rotating block is contacted with the shell limiting block 5, so that the whole system stops running. The rotating block 7 is connected with the steering shaft 2 by adopting a conical surface, torque is transmitted between the two conical surfaces by means of interference fit, the rotating block 7 can be fixed with the steering shaft 2 by adopting a hexagonal nut 13, so that assembly errors can be generated between the steering block 7 and the follow-up block 8, and therefore, the positioning ring 14 between the rotating block and the follow-up block is made of rubber materials, the assembly gaps are compensated, and abnormal noise caused by collision is avoided. And the positioning blocks 11 among the follow-up blocks can be produced by adopting raw steel materials.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. The rotation limiting structure is characterized by comprising a steering shaft, a rotating block, a follower block, a positioning block and a shell; the steering shaft is fixed on the shell by a bearing I; the rotating block and the follow-up block are both positioned in the shell, and are axially and sequentially arranged outside the steering shaft;
the rotating block is fixedly pressed on the rotating shaft through a hexagonal nut, a flat key is arranged between the rotating block and the steering shaft, a limiting block is arranged at the top end of the rotating block, and the limiting block pushes the limiting surface at the top end of the follow-up block to rotate;
the follow-up block is arranged on the steering shaft through a second bearing, a limiting block is also arranged at the top end of the follow-up block, and the limiting block contacts with a shell limiting block on the inner wall of the shell to prevent the steering shaft from rotating; the following blocks and the rotating blocks are separated by the positioning blocks.
2. The rotation limiting structure for steer-by-wire of claim 1, wherein the axis of the steering shaft is coaxial with the axes of the turning block, the follower block and the housing limiting block.
3. A rotation limiting structure for steer-by-wire as claimed in claim 1 or 2, wherein the turning block and the follower block are fixed on the steering shaft or the housing by rolling bearings or sliding bearings.
4. A rotation limiting structure for steer-by-wire as claimed in claim 3, wherein a plurality of said follower blocks are provided.
5. The rotary limiting structure for steer-by-wire of claim 4, wherein the contact surfaces between the limiting blocks and the limiting surfaces of the rotating block and the follow-up block are made of rubber materials for damping, so that noise generated by collision is reduced.
6. The rotation limiting structure for steer-by-wire of claim 1, wherein the steering shaft is fixed with the follower block by means of a flat key, spline or conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320504907.6U CN219749925U (en) | 2023-03-16 | 2023-03-16 | Be applied to rotation limit structure that drive-by-wire turned to |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320504907.6U CN219749925U (en) | 2023-03-16 | 2023-03-16 | Be applied to rotation limit structure that drive-by-wire turned to |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219749925U true CN219749925U (en) | 2023-09-26 |
Family
ID=88082662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320504907.6U Active CN219749925U (en) | 2023-03-16 | 2023-03-16 | Be applied to rotation limit structure that drive-by-wire turned to |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219749925U (en) |
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2023
- 2023-03-16 CN CN202320504907.6U patent/CN219749925U/en active Active
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