CN214028827U - Independent drive-by-wire steering device of wheel and car - Google Patents
Independent drive-by-wire steering device of wheel and car Download PDFInfo
- Publication number
- CN214028827U CN214028827U CN202023254714.5U CN202023254714U CN214028827U CN 214028827 U CN214028827 U CN 214028827U CN 202023254714 U CN202023254714 U CN 202023254714U CN 214028827 U CN214028827 U CN 214028827U
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- worm
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- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000010276 construction Methods 0.000 claims 1
- 230000005284 excitation Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses an independent drive-by-wire steering device of wheel and car, include: the steering devices are arranged in one-to-one correspondence with the steering wheels; the steering device includes: the steering knuckle is fixedly connected with a steering wheel; a knuckle arm fixedly connected to the knuckle; one end of the tie rod is hinged with the knuckle arm; one end of the screw rod is coaxially and fixedly connected with the other end of the steering tie rod; the nut is mounted on the lead screw in a matching manner; the worm wheel is coaxially and fixedly sleeved on the nut; a worm in meshed transmission with the worm wheel; a steering motor fixedly mounted on a vehicle chassis, the steering motor having a power output shaft; wherein, the worm is coaxially and fixedly connected to the power output shaft.
Description
Technical Field
The utility model discloses drive-by-wire turns to car technical field, in particular to independent drive-by-wire of wheel turns to device and car.
Background
Because a steering wheel system and steering wheels in the steer-by-wire automobile are not mechanically connected, the steering of the wheels is controlled by an electric signal instruction, and the realization of a target instruction to a wheel turning angle needs a set of actuating mechanism, on one hand, the target wheel turning angle needs to be realized, and on the other hand, the wheels are ensured not to swing left and right along with the excitation of a road surface so as to ensure the stability and reliability of the steering. When the road surface roughness is relatively poor, the current steer-by-wire device often can make the corner of wheel horizontal hunting owing to receive the excitation on road surface, can't guarantee the stability of the process of turning to.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a wheel independent steer-by-wire device which is arranged corresponding to the steering wheel one by one, so that the turning angles of the left and right steering wheels can be set independently; the steering device is combined with a worm gear mechanism with a self-locking characteristic through a nut screw mechanism, the worm gear cannot be rotated by tire force caused by road bumping, and the condition that the rotation angle of a wheel cannot swing left and right along with road excitation is guaranteed, so that the steering stability and reliability are ensured.
The utility model also provides an automobile, its adoption the independent drive-by-wire of wheel device that turns to can realize bigger steering angle for traditional vehicle.
The utility model provides a technical scheme does:
a wire-controlled steering device with independent wheels and an automobile are provided, wherein the steering device is in one-to-one correspondence with the steered wheels; the steering device includes:
the steering knuckle is fixedly connected with a steering wheel;
a knuckle arm fixedly connected to the knuckle;
one end of the tie rod is hinged with the knuckle arm;
one end of the screw rod is coaxially and fixedly connected with the other end of the steering tie rod;
the nut is mounted on the lead screw in a matching manner;
the worm wheel is coaxially and fixedly sleeved on the nut;
a worm in meshed transmission with the worm wheel;
a steering motor fixedly mounted on a vehicle chassis, the steering motor having a power output shaft;
wherein, the worm is coaxially and fixedly connected to the power output shaft.
Preferably, the wheel-independent steer-by-wire apparatus further includes:
a steering device housing fixedly mounted on a vehicle chassis;
the steering motor is fixedly arranged in the steering device shell;
through holes are respectively formed in the two sides of the steering device shell corresponding to the nuts; the nut can rotate and simultaneously passes through the two through holes.
Preferably, the tie rod and the lead screw are of an integrated structure.
Preferably, a bearing is fixedly installed in the housing, and the nut is rotatably supported in the bearing.
Preferably, the wheel-independent steer-by-wire apparatus further includes:
and the dustproof rubber sleeve is sleeved outside the lead screw.
Preferably, the other end of the screw rod is provided with a limit nut, and the limit nut is positioned outside the dustproof rubber sleeve;
when the screw rod moves to the position limited by the limiting nut, the rotating angle of the steering wheel is 90 degrees.
Preferably, the tie rod and the knuckle arm are connected by a ball stud.
Preferably, the wheel-independent steer-by-wire apparatus further includes:
a wheel rotation angle sensor for detecting a rotation angle of a steered wheel;
wherein the shaft portion of the wheel steering angle sensor is fixedly connected with the knuckle; and the shell of the wheel rotation angle sensor is fixedly arranged on the vehicle body.
An automobile is characterized in that the wheel independent steer-by-wire device is used.
The utility model has the advantages that:
1. by disconnecting the steering tie rod of the traditional vehicle and additionally installing the steering device, the transition from traditional steering to steer-by-wire can be quickly realized from hardware, and the change to the chassis of the vehicle is small.
2. The steering device adopts a worm and gear mechanism, so that the external excitation on the wheel does not influence the wheel corner, and the reverse input of the wheel corner can be ensured to be self-locked.
3. The steering device integrates the steering motor, the worm gear and the worm screw, so that the occupied vehicle space is smaller while the wheel steering function is realized, and the replacement and the maintenance of the steering device are easier.
4. The steering angle of the wheels is independently controllable, and the left wheel and the right wheel are not mechanically connected, so that a large steering angle which cannot be realized by a traditional vehicle can be realized under the condition of the allowance of the space design of the wheels, and the requirements of special steering modes such as in-situ center steering and transverse driving are met; more flexible chassis arrangement can be provided for future multi-mode intelligent steering vehicles.
Drawings
Fig. 1 is a schematic structural diagram of the independent steer-by-wire device for wheels according to the present invention.
Fig. 2 is a schematic view of the working principle of the independent steer-by-wire device for wheels according to the present invention.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
As shown in fig. 1-2, the utility model provides an independent drive-by-wire steering device of wheel and car, it mainly includes: the steering device comprises a steering wheel 1, a wheel angle sensor 2, a steering knuckle 3, a steering device shell 4, a steering motor 5, a worm 6, a dustproof rubber sleeve 7, a limit nut 8, a lead screw 9, a worm wheel 10, a nut 10a, a bearing 11, a steering tie rod 12, a connecting nut 13, a ball pin 14 and a steering knuckle arm 15.
The utility model discloses with the tie rod disconnection of traditional vehicle to dispose one set of this steering device alone on every directive wheel 1. The knuckle 3 is rigidly connected to the wheel 1 and the knuckle arm 15. When the steering knuckle 3 rotates, the steering wheel 1 turns synchronously with the steering knuckle 3. The shell of the wheel rotation angle sensor 2 is fixed on the vehicle body, and the shaft part of the wheel rotation angle sensor 2 is fixedly connected to the steering knuckle 3; the spindle 3 rotates to rotate the shaft of the wheel rotation angle sensor 2, and the wheel rotation angle sensor 2 collects the rotation angle of the steerable wheel 1.
The steering gear housing 4 is fixed to the vehicle chassis. The steering motor 5 is fixedly arranged in the steering device shell 4, and an output shaft of the steering motor 5 is connected with the worm 6; the worm wheel 10 is in meshed transmission with the worm 6. The worm wheel 10 and the lead screw 9 are coaxially arranged; a nut 10a is integrated at the center of the worm wheel 10, and the nut 10a is installed on the lead screw 9 in a matching manner, so that the worm wheel 10 is in threaded connection with the lead screw 9; thereby converting the rotation of the worm wheel 10 into a linear movement of the lead screw 9. Through holes are respectively formed in the two sides of the steering device shell 4 corresponding to the nuts 10a, so that the nuts 10a can rotate and simultaneously pass through the two through holes.
The screw rod 9 and the tie rod 12 are integrated, the tie rod 12 is used for transmitting the linear displacement of the screw rod 9, the tie rod 12 is connected with a knuckle arm 15 on the knuckle 3 through a ball pin 14 and a nut 13, and the linear displacement of the tie rod 12 is converted into the angular displacement of the knuckle 3.
Wherein, one end of the screw 12 is provided with a limit nut 8, and the limit nut 8 is used for limiting the moving distance of the screw 12; when the screw rod 12 moves to the position limited by the limit nut 8, the rotating angle of the steering wheel is 90 degrees. By extending the threaded spindle 12 outwards, a 90 ° steering of the steerable wheels 1 can be achieved.
Preferably, a bearing 11 is fixedly installed in the steering device housing 4, and a nut 10a is rotatably supported in the bearing 11; so as to ensure the smooth operation of the steering device.
As a further preferred aspect, the steering device further includes: and the dustproof rubber sleeve 7 is sleeved outside the lead screw 12. Wherein, the limit nut 8 is positioned at the outer side of the dustproof rubber sleeve 7.
When the wheels turn, a steering motor 5 fixed on a steering device shell 4 drives a worm wheel 10 to rotate through a worm 6, the worm wheel 10 rotates around a lead screw 9, and meanwhile, the lead screw 9 is driven to linearly move through threads of a nut 10a integrated in the worm wheel 10, so that a steering tie rod 12 transversely moves left and right. Since the tie rod 12 and the knuckle arm are connected by the thread on the ball stud 14 and the nut 13 and the knuckle can only rotate about the kingpin axis 16 fixed to the vehicle body, when the tie rod pulls the knuckle arm 15 by the ball stud 14, the knuckle 3 rotates together with the wheel 1 about the kingpin axis 16, thereby achieving steering of the wheel 1. By adopting the worm gear mechanism with the self-locking characteristic, the tire force caused by road bumping cannot enable the worm gear to rotate, so that the lead screw cannot move back and forth, the wheel rotation angle is ensured to be fixed, namely, the road excitation cannot cause the wheel rotation angle to change, and the steering reliability is ensured.
The steer-by-wire controller detects the wheel rotation angle through the wheel rotation angle sensor 2, when the wheel rotation angle is consistent with the target rotation angle, the motor stops rotating, if the wheel rotation angle is inconsistent with the target rotation angle, the steer-by-wire control unit sends an enabling and direction instruction to the motor to control the motor to continue rotating until the actual rotation angle of the wheel is consistent with the target rotation angle; namely, the wheel rotation is controlled in real time through signal commands.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (9)
1. The independent steer-by-wire device of a kind of wheel, characterized by that, the said steering gear is set up with turning to the wheel one-to-one; the steering device includes:
the steering knuckle is fixedly connected with a steering wheel;
a knuckle arm fixedly connected to the knuckle;
one end of the tie rod is hinged with the knuckle arm;
one end of the screw rod is coaxially and fixedly connected with the other end of the steering tie rod;
the nut is mounted on the lead screw in a matching manner;
the worm wheel is coaxially and fixedly sleeved on the nut;
a worm in meshed transmission with the worm wheel;
a steering motor fixedly mounted on a vehicle chassis, the steering motor having a power output shaft;
wherein, the worm is coaxially and fixedly connected to the power output shaft.
2. The wheel-independent steer-by-wire apparatus according to claim 1, further comprising:
a steering device housing fixedly mounted on a vehicle chassis;
the steering motor is fixedly arranged in the steering device shell;
through holes are respectively formed in the two sides of the steering device shell corresponding to the nuts; the nut can rotate and simultaneously passes through the two through holes.
3. The wheel-independent steer-by-wire apparatus of claim 2, wherein said tie rod is of unitary construction with said lead screw.
4. The wheel-independent steer-by-wire apparatus of claim 3, wherein a bearing is fixedly mounted within said housing, said nut being rotatably supported in said bearing.
5. The wheel-independent steer-by-wire apparatus according to claim 3 or 4, further comprising:
and the dustproof rubber sleeve is sleeved outside the lead screw.
6. The wheel independent wire control steering device according to claim 5, wherein a limit nut is arranged at the other end of the screw rod and is positioned outside the dustproof rubber sleeve;
when the screw rod moves to the position limited by the limiting nut, the rotating angle of the steering wheel is 90 degrees.
7. The wheel-independent steer-by-wire apparatus according to claim 6, wherein said tie rod and said knuckle arm are connected by a ball stud.
8. The wheel-independent steer-by-wire apparatus according to claim 7, further comprising:
a wheel rotation angle sensor for detecting a rotation angle of a steered wheel;
wherein a shaft portion of the wheel rotation angle sensor is fixedly connected to the knuckle; and the shell of the wheel rotation angle sensor is fixedly arranged on the vehicle body.
9. An automobile, characterized in that the wheel-independent steer-by-wire apparatus according to claims 1 to 8 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023254714.5U CN214028827U (en) | 2020-12-29 | 2020-12-29 | Independent drive-by-wire steering device of wheel and car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023254714.5U CN214028827U (en) | 2020-12-29 | 2020-12-29 | Independent drive-by-wire steering device of wheel and car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214028827U true CN214028827U (en) | 2021-08-24 |
Family
ID=77343375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023254714.5U Expired - Fee Related CN214028827U (en) | 2020-12-29 | 2020-12-29 | Independent drive-by-wire steering device of wheel and car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214028827U (en) |
-
2020
- 2020-12-29 CN CN202023254714.5U patent/CN214028827U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210824 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |