CN220577348U - Steering gear and vehicle - Google Patents
Steering gear and vehicle Download PDFInfo
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- CN220577348U CN220577348U CN202322183603.7U CN202322183603U CN220577348U CN 220577348 U CN220577348 U CN 220577348U CN 202322183603 U CN202322183603 U CN 202322183603U CN 220577348 U CN220577348 U CN 220577348U
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- steering gear
- gear
- driving shaft
- motor
- speed reducing
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- 230000007246 mechanism Effects 0.000 claims abstract description 65
- 230000009467 reduction Effects 0.000 claims abstract description 45
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 abstract description 22
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a steering gear and a vehicle, wherein the steering gear comprises: a driving motor; a drive shaft; a speed reducing mechanism, the speed reducing mechanism comprising: one-level reduction gears and second grade reduction gears, one-level reduction gears includes: the planetary gear on the planet carrier is meshed between the sun gear and the gear ring, the gear ring is connected with a secondary speed reduction mechanism, and the secondary speed reduction mechanism is connected with a driving shaft so as to realize that the driving motor drives the driving shaft to axially move. Through with sun gear and driving motor coaxial coupling, greatly reduced the steering gear volume, and the volume is regular, is favorable to whole car development to arrange the work, and this reduction gears still is two-stage reduction gears, can not reduce the helping hand ability. And moreover, the gear ring drives the secondary speed reducing mechanism to reduce the speed, so that the three meshing transmission of the sun wheel, the planet wheel and the gear ring is realized, the movement stability is better, the movement control precision of the steering gear is improved, and the sensitivity of the steering gear is better improved.
Description
Technical Field
The utility model relates to the technical field of automobiles, in particular to a steering gear and a vehicle.
Background
The current electric power steering gear is mainly divided into: single pinion power steering, double pinion power steering, and belt driven power steering. The power steering device with the transmission shaft is provided with a belt pulley on a ball nut, a motor is arranged in parallel with the axis of a rack, a first-stage speed reduction and torque increase are carried out through the transmission mechanism, and rotary motion is converted into transverse movement through the ball screw nut (the ball screw mechanism is a second-stage speed reduction and torque increase).
In the related art, a motor in the belt transmission steering gear is parallel to the axis of the rack, so that the steering gear is large in size, and in the whole vehicle development process, the belt transmission is large in size and irregular, so that the whole vehicle arrangement work is not facilitated.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the steering gear, the sun gear is coaxially connected with the driving motor, the volume of the steering gear is reduced, the steering gear is regular in volume, the development and arrangement work of the whole vehicle are facilitated, and the speed reducing mechanism is still a two-stage speed reducing mechanism and cannot reduce the boosting capability.
The utility model further proposes a vehicle.
According to an embodiment of the first aspect of the present utility model, a steering gear includes: a driving motor; a drive shaft; a speed reducing mechanism, the speed reducing mechanism comprising: one-level reduction gears and second grade reduction gears, one-level reduction gears includes: the planetary gear on the planet carrier is meshed between the sun gear and the gear ring, the gear ring is connected with the secondary speed reduction mechanism, and the secondary speed reduction mechanism is connected with the driving shaft so as to realize that the driving motor drives the driving shaft to move along the axial direction.
According to the steering gear disclosed by the embodiment of the utility model, the sun gear is coaxially connected with the driving motor, so that the driving motor and the driving shaft are coaxially arranged, the volume of the steering gear is greatly reduced, the steering gear is regular in volume, the development and arrangement work of the whole automobile are facilitated, and the speed reducing mechanism is still a two-stage speed reducing mechanism and cannot reduce the boosting capacity. In addition, the steering gear drives the secondary speed reducing mechanism to reduce speed through the gear ring in the primary speed reducing mechanism, and compared with the speed reduction of the secondary speed reducing mechanism driven by the planet carrier in the planetary gear mechanism, the steering gear realizes the meshing transmission of the sun wheel, the planet wheel and the gear ring, has better motion stability, is not easy to shake, improves the motion control precision of the steering gear, and better improves the sensitivity of the steering gear.
According to some embodiments of the utility model, the secondary reduction mechanism comprises: the screw rod nut is connected with the gear ring, at least part of the surface of the driving shaft is provided with threads, and the driving shaft is in transmission fit with the screw rod nut.
According to some embodiments of the utility model, the secondary reduction mechanism comprises: the screw rod shaft is in transmission fit with the screw rod nut.
According to some embodiments of the utility model, the diverter further comprises: the driving motor, the driving shaft and the speed reducing mechanism are arranged in the shell, and the planet carrier is fixedly connected with the inner wall of the shell.
According to some embodiments of the utility model, the diverter further comprises: a first bearing, said drive shaft being movably supported within said housing by at least one of said first bearings.
According to some embodiments of the utility model, the drive motor comprises: the motor rotor is rotatably sleeved between the motor stator and the driving shaft, and the motor rotor is coaxially connected with the sun gear.
According to some embodiments of the utility model, the diverter further comprises: the motor rotor is sleeved between the second bearing and the third bearing along one end of the axial direction, the outer circumferential surface of the second bearing is abutted against the inner wall of the shell, and the inner circumferential surface of the third bearing is abutted against the driving shaft.
According to some embodiments of the utility model, the sun gear is coaxially sleeved on the outer peripheral surface of one end of the motor rotor along the axial direction.
According to some embodiments of the utility model, the diverter further comprises: the device comprises an angle sensor and a displacement sensor, wherein the angle sensor is used for detecting the rotation angle of the driving motor, and the displacement sensor is used for detecting the axial displacement of the driving shaft.
According to an embodiment of the second aspect of the present utility model, a vehicle includes: the steering gear.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic structural view of a steering gear according to an embodiment of the present utility model;
FIG. 2 is an exploded schematic view of a diverter according to an embodiment of the present utility model;
fig. 3 is a schematic cross-sectional view of a diverter according to an embodiment of the utility model.
Reference numerals:
100. a diverter; 1. a driving motor; 1a, a motor stator; 1b, a motor rotor; 2. a drive shaft; 3. a sun gear; 4. a planet carrier; 5. a gear ring; 6. a planet wheel; 7. a screw nut; 8. a housing; 9. a first bearing; 10. a second bearing; 11. a third bearing; 12. and a fourth bearing.
Detailed Description
Embodiments of the present utility model will be described in detail below, by way of example with reference to the accompanying drawings.
A diverter according to an embodiment of the present utility model is described below with reference to fig. 1-3.
The motor in the current belt transmission steering gear is parallel to the axis of the rack, so that the steering gear is large in size, and in the whole vehicle development process, the belt transmission is large in size and irregular, so that the whole vehicle arrangement work is not facilitated.
Therefore, the present utility model provides a steering gear to solve the above-mentioned technical problems.
As shown in fig. 1 to 3, the steering gear 100 includes: a drive motor 1, a drive shaft 2 and a reduction mechanism. In this way, the drive motor 1 drives the drive shaft 2 to move in the axial direction through the reduction mechanism, and the drive shaft 2 is connected to the knuckle to drive the wheels to achieve steering.
The speed reducing mechanism includes: a primary speed reducing mechanism and a secondary speed reducing mechanism. That is, the driving motor 1 is transmitted to the driving shaft 2 after two-stage deceleration, and the transmission ratio is large, so that the control accuracy requirement is low, the control difficulty is low, the required rated torque of the motor is small, and the driving motor 1 has a higher rotating speed under the same power, so that the sensitivity of the steering gear 100 is improved.
Wherein, one-level reduction gears includes: the planetary gear drive device comprises a sun gear 3, a planet carrier 4 and a gear ring 5, wherein the sun gear 3 is coaxially connected with a drive motor 1, a planet wheel 6 on the planet carrier 4 is meshed between the sun gear 3 and the gear ring 5, the gear ring 5 is connected with a secondary speed reduction mechanism, and the secondary speed reduction mechanism is connected with a drive shaft 2 so as to realize that the drive motor 1 drives the drive shaft 2 to axially move.
Specifically, the primary reduction mechanism is a planetary gear mechanism, wherein the sun gear 3 is coaxially connected with the driving motor 1, in other words, the sun gear 3 and the driving motor 1 are connected along the same rotation axis, the planet gears 6 on the planet carrier 4 are meshed between the sun gear 3 and the gear ring 5, when the driving motor 1 drives the sun gear 3 to rotate, the planet gears 6 can also revolve around the rotation axis of the sun gear 3 while rotating, torque is reduced through planetary gear transmission and the gear ring 5, the gear ring 5 transmits power to the secondary reduction mechanism, then the rotation motion is changed into transverse axial motion through the secondary reduction mechanism, and finally the power is transmitted to the driving shaft 2.
Therefore, through the coaxial connection of the sun gear 3 and the driving motor 1, the coaxial arrangement of the driving motor 1 and the driving shaft 2 is realized, the volume of the steering gear 100 is greatly reduced, the volume is regular, the whole vehicle development and arrangement work is facilitated, and the speed reducing mechanism is still a two-stage speed reducing mechanism, and the power assisting capability is not reduced. In addition, the steering gear 100 drives the secondary speed reducing mechanism to reduce speed through the gear ring 5 in the primary speed reducing mechanism, and compared with the speed reduction of the secondary speed reducing mechanism driven by the planet carrier 4 in the planetary gear mechanism, the three gears of the sun gear 3, the planet wheel 6 and the gear ring 5 are meshed and driven, so that the steering gear has better motion stability, is not easy to shake, can improve the motion control precision of the steering gear 100, and better improves the sensitivity of the steering gear 100.
According to some embodiments of the utility model, the secondary reduction mechanism comprises: the screw nut 7, the screw nut 7 is connected with the gear ring 5, and at least part of the surface of the driving shaft 2 is provided with threads, and the driving shaft 2 is in transmission fit with the screw nut 7.
Specifically, the lead screw nut 7 is connected with the ring gear 5 so that power is transmitted from the primary reduction mechanism to the secondary reduction mechanism. And, as shown in connection with fig. 3, threads are provided at least partially on the surface of the drive shaft 2 to be in driving engagement with the screw nut 7, thereby converting the rotational movement of the screw nut 7 into an axial movement of the drive shaft 2.
Compared with the ball screw nut in the prior art, the two-stage reduction mechanism directly cancels the structural design of the screw shaft, combines the screw shaft and the driving shaft 2 into one, namely, is provided with threads matched with the screw nut 7 in a transmission way on the driving shaft 2, simplifies the structural design on the premise of ensuring the unchanged transmission function, is beneficial to installation and effectively improves the production efficiency.
According to some embodiments of the utility model, the secondary reduction mechanism comprises: the screw nut 7 and the screw shaft, the screw nut 7 is connected with the gear ring 5, the screw shaft is coaxially connected with the driving shaft 2, and the screw shaft is in transmission fit with the screw nut 7.
Specifically, the ring gear 5 is connected with a screw nut 7, and the screw shaft is coaxially connected with the drive shaft 2, and is in driving engagement with the screw shaft through the screw nut 7, so that power is transmitted from the primary reduction mechanism to the secondary reduction mechanism, thereby converting the rotational movement of the screw nut 7 into the axial movement of the drive shaft 2.
As shown in fig. 3, the steering gear 100 further includes: the driving motor 1, the driving shaft 2 and the speed reducing mechanism are arranged in the shell 8, and the planet carrier 4 is fixedly connected with the inner wall of the shell 8. Specifically, the driving motor 1, the driving shaft 2 and the reduction mechanism are all installed in the housing 8, and the carrier 4 is fixedly connected with the inner wall of the housing 8, so that the driving motor 1 drives the sun gear 3 to rotate, the planetary gears 6 on the carrier 4 are meshed between the sun gear 3 and the ring gear 5, and the rotation of the ring gear 5 transmits power to the secondary reduction mechanism, and then the rotational motion is changed into transverse axial motion through the secondary reduction mechanism, and finally the power is transmitted to the driving shaft 2.
In some embodiments, the diverter 100 further includes: the first bearings 9, the drive shaft 2 is movably supported within the housing 8 by at least one first bearing 9. So arranged, a first bearing 9 is provided between the drive shaft 2 and the inner wall of the housing 8 to allow the drive shaft 2 to be movably supported for axial movement within the housing 8.
In the embodiment of the present utility model, the first bearings 9 are respectively installed at both ends of the driving shaft 2 in the axial direction, so that stable axial movement of the driving shaft 2 can be ensured, and the movement accuracy of the steering gear 100 can be improved.
Further, the drive motor 1 includes: the motor comprises a motor stator 1a and a motor rotor 1b, wherein the motor rotor 1b is rotatably sleeved between the motor stator 1a and a driving shaft 2, and the motor rotor 1b is coaxially connected with a sun gear 3. So arranged, the motor rotor 1b is in coaxial, hollow relationship with the drive shaft 2, which is advantageous in shortening the overall axial volume of the steering gear 100.
In some embodiments, the diverter 100 further includes: the second bearing 10 and the third bearing 11 are provided with one end of the motor rotor 1b in the axial direction interposed between the second bearing 10 and the third bearing 11, the outer peripheral surface of the second bearing 10 being in abutment with the inner wall of the housing 8, and the inner peripheral surface of the third bearing 11 being in abutment with the drive shaft 2. So set up, the one end cover of motor rotor 1b along axial direction is established between second bearing 10 and third bearing 11 for second bearing 10 butt in casing 8 inner wall, third bearing 11 butt in drive shaft 2 outer wall can guarantee that motor rotor 1b compares in drive shaft 2 rotation reliably, and drives sun gear 3 and rotate, effectively improves the motion sensitivity of steering gear 100.
In some embodiments, the sun gear 3 is coaxially provided on the outer peripheral surface of one end of the motor rotor 1b in the axial direction. As shown in fig. 2 and 3, the sun gear 3 is fitted over the outer peripheral surface of one end of the motor rotor 1b in the axial direction, and this mounting structure preferably shortens the overall axial volume of the steering gear 100, which is advantageous for a compact space layout.
In some embodiments, the lead screw nut 7 of the secondary reduction mechanism may be supported within the housing 8 by a fourth bearing 12.
Further, the steering gear 100 further includes: an angle sensor for detecting the rotation angle of the drive motor 1, and a displacement sensor for detecting the axial displacement of the drive shaft 2.
Specifically, an angle sensor may be provided on the motor rotor 1b, and a displacement sensor may be a linear displacement sensor. Through setting up angle sensor and displacement sensor, can monitor the angle behind the steering wheel, according to steering angle, control driving motor 1 in order to restrain the reverse effort that comes from road surface wheel to bring, avoid the road surface impact to cause the steering to disturb.
According to an embodiment of the second aspect of the present utility model, a vehicle includes: a diverter 100.
Therefore, through the coaxial connection of the sun gear 3 and the driving motor 1, the coaxial arrangement of the driving motor 1 and the driving shaft 2 is realized, the volume of the steering gear 100 is greatly reduced, the volume is regular, the whole vehicle development and arrangement work is facilitated, and the speed reducing mechanism is still a two-stage speed reducing mechanism, and the power assisting capability is not reduced. In addition, the steering gear 100 drives the secondary speed reducing mechanism to reduce speed through the gear ring 5 in the primary speed reducing mechanism, and compared with the speed reduction of the secondary speed reducing mechanism driven by the planet carrier 4 in the planetary gear mechanism, the three gears of the sun gear 3, the planet wheel 6 and the gear ring 5 are meshed and driven, so that the steering gear has better motion stability, is not easy to shake, can improve the motion control precision of the steering gear 100, and better improves the sensitivity of the steering gear 100. In addition, compared with the ball screw nut in the prior art, the two-stage speed reducing mechanism can cancel the structural design of the screw shaft, and combines the screw shaft and the driving shaft 2 into a whole, namely, the driving shaft 2 is provided with threads for being in transmission fit with the screw nut 7, so that the structural design is simplified on the premise of ensuring the unchanged transmission function, the installation is facilitated, and the production efficiency is effectively improved.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A diverter, comprising:
a driving motor;
a drive shaft;
a speed reducing mechanism, the speed reducing mechanism comprising: one-level reduction gears and second grade reduction gears, one-level reduction gears includes: the planetary gear on the planet carrier is meshed between the sun gear and the gear ring, the gear ring is connected with the secondary speed reduction mechanism, and the secondary speed reduction mechanism is connected with the driving shaft so as to realize that the driving motor drives the driving shaft to move along the axial direction.
2. The steering gear according to claim 1, wherein the secondary reduction mechanism includes: the screw rod nut is connected with the gear ring, at least part of the surface of the driving shaft is provided with threads, and the driving shaft is in transmission fit with the screw rod nut.
3. The steering gear according to claim 1, wherein the secondary reduction mechanism includes: the screw rod shaft is in transmission fit with the screw rod nut.
4. The steering gear according to claim 1, further comprising: the driving motor, the driving shaft and the speed reducing mechanism are arranged in the shell, and the planet carrier is fixedly connected with the inner wall of the shell.
5. The steering gear according to claim 4, further comprising: a first bearing, said drive shaft being movably supported within said housing by at least one of said first bearings.
6. The steering gear according to claim 4, wherein the drive motor includes: the motor rotor is rotatably sleeved between the motor stator and the driving shaft, and the motor rotor is coaxially connected with the sun gear.
7. The diverter of claim 6, further comprising: the motor rotor is sleeved between the second bearing and the third bearing along one end of the axial direction, the outer circumferential surface of the second bearing is abutted against the inner wall of the shell, and the inner circumferential surface of the third bearing is abutted against the driving shaft.
8. The steering gear according to claim 6, wherein the sun gear is coaxially fitted over an outer peripheral surface of one end of the motor rotor in the axial direction.
9. The steering gear according to claim 1, further comprising: the device comprises an angle sensor and a displacement sensor, wherein the angle sensor is used for detecting the rotation angle of the driving motor, and the displacement sensor is used for detecting the axial displacement of the driving shaft.
10. A vehicle, characterized by comprising: the diverter of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322183603.7U CN220577348U (en) | 2023-08-15 | 2023-08-15 | Steering gear and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322183603.7U CN220577348U (en) | 2023-08-15 | 2023-08-15 | Steering gear and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220577348U true CN220577348U (en) | 2024-03-12 |
Family
ID=90111707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322183603.7U Active CN220577348U (en) | 2023-08-15 | 2023-08-15 | Steering gear and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220577348U (en) |
-
2023
- 2023-08-15 CN CN202322183603.7U patent/CN220577348U/en active Active
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