CN216969790U - Vehicle steering device and vehicle - Google Patents
Vehicle steering device and vehicle Download PDFInfo
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- CN216969790U CN216969790U CN202122616490.6U CN202122616490U CN216969790U CN 216969790 U CN216969790 U CN 216969790U CN 202122616490 U CN202122616490 U CN 202122616490U CN 216969790 U CN216969790 U CN 216969790U
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Abstract
The utility model discloses a vehicle steering device and a vehicle, wherein the vehicle steering device comprises: a housing; the screw rod is arranged in the shell; the feed screw nut is sleeved on the feed screw and is in transmission fit with the feed screw; the driving component is arranged on the shell; the first transmission wheel is arranged in the shell, the first transmission wheel is sleeved on the screw rod nut and is in transmission fit with the driving assembly, the first transmission wheel and the screw rod nut are in interference fit, and at least one of the first transmission wheel and the screw rod nut is provided with a spline. From this, through with first drive wheel and screw-nut interference fit to make at least one between them set up the spline, can promote first drive wheel and screw-nut complex stability and fastness under the prerequisite of guaranteeing first drive wheel and screw-nut concentricity.
Description
Technical Field
The utility model relates to the technical field of vehicles, in particular to a steering device of a vehicle and the vehicle.
Background
With the development of automobile technology, the demand of people on driving space is continuously increased, the front and rear wheelbases of the passenger cars are increased by more and more passenger cars, and in order to overcome the limitation that the turning radius of the large wheelbase car is increased and the operation is not flexible enough, more and more cars are provided with rear wheel steering devices;
in the correlation technique, rear wheel steering device adopts synchronous belt drive structure more, in this structure, carry out interference fit through screw-nut and big belt pulley, in order to reach the purpose of transmission moment of torsion, in this structure, big belt pulley internal diameter is the plain noodles with the screw-nut external diameter, rely on the size of interference magnitude to guarantee the size of transmission moment of torsion completely, not only can lead to the parts machining required precision height like this, but also when still can making screw-nut and big belt pulley transmission big moment of torsion, take place to skid inefficacy, reduce rear wheel steering device's structural reliability.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a steering device of a vehicle, which has a more stable and firm structure.
The utility model further provides a vehicle.
A steering device of a vehicle according to an embodiment of the present invention includes: a housing; the screw rod is arranged in the shell; the screw rod nut is sleeved on the screw rod and is in transmission fit with the screw rod; the driving assembly is arranged on the shell; a first drive wheel, first drive wheel set up in the casing, first drive wheel cover is established on the screw-nut and with drive assembly transmission fit, first drive wheel with screw-nut interference fit and at least one are provided with the spline.
From this, through with first drive wheel and screw-nut interference fit to make at least one of them set up the spline, can promote first drive wheel and screw-nut complex stability and fastness under the prerequisite of guaranteeing first drive wheel and screw-nut concentricity.
According to some embodiments of the present invention, the feed screw nut is provided at an outer periphery thereof with a smooth shaft portion and an external spline portion, the smooth shaft portion is located axially outside the external spline portion, the spline is provided at the external spline portion, and the first drive wheel is provided at an inner periphery thereof with a mounting hole that is interference-fitted to the external spline portion.
According to some embodiments of the utility model, the outer diameter of the optical shaft portion is D1, the outer diameter of the externally splined portion is D2, the inner diameter of the mounting hole is D3, and D1, D2, and D3 satisfy the relation: d3 < D1 < D2.
According to some embodiments of the present invention, the first drive wheel is provided at an inner periphery thereof with a plain hole portion and an internal spline portion, the plain hole portion being located at one axial side of the internal spline portion, and the feed screw nut is provided with a plain shaft portion that is interference-fitted with the plain hole portion and the internal spline portion, respectively.
According to some embodiments of the utility model, the inner diameter of the light aperture portion is D4, the inner diameter of the internally splined portion is D5, the inner diameter of the light shaft portion is D6, and D4, D5, and D6 satisfy the relation: d5 < D4 < D6.
According to some embodiments of the utility model, the steering apparatus of the vehicle further comprises: bearing and retaining member, the bearing set up in screw-nut is last, the bearing includes: the inner ring is in interference fit with the screw nut, and the outer ring is fixed in the shell through the locking piece.
According to some embodiments of the utility model, the steering apparatus of the vehicle further comprises: the axial limiting part is arranged on the screw rod, the shell is provided with a limiting groove, and the axial limiting part is in axial limiting fit with the limiting groove.
According to some embodiments of the utility model, the axial stop comprises: the connecting rod is connected with the screw rod and between the limiting blocks, and the limiting blocks are arranged in the limiting grooves in a sliding mode.
According to some embodiments of the utility model, the driving assembly comprises a driving member, a second transmission wheel and a transmission belt, the second transmission wheel is arranged on the driving member, the second transmission wheel and the first transmission wheel are in transmission fit through the transmission belt, and the diameter of the first transmission wheel is larger than that of the second transmission wheel.
A vehicle according to an embodiment of the present invention includes: the steering device for a vehicle described above.
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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a partial schematic view of a steering device of a vehicle according to an embodiment of the utility model;
FIG. 2 is a schematic view of a feed screw nut and a first drive wheel according to an embodiment of the utility model;
FIG. 3 is a cross-sectional view of a feed screw nut and a first drive wheel according to an embodiment of the present invention;
figure 4 is a schematic illustration of a feed screw nut according to an embodiment of the present invention.
Reference numerals:
100. a steering device;
10. a housing; 11. a limiting groove;
20. a screw rod; 21. an axial stop; 211. a connecting rod; 212. a limiting block; 22-a connecting shaft;
30. a feed screw nut; 31. a light axis part; 32. an outer spline portion; 321. a spline;
40. a drive assembly; 41. a drive member; 42. a second transmission wheel;
50. a first drive pulley; 51. mounting holes;
60. a bearing; 61. an inner ring; 62. a rolling member; 63. an outer ring; 64. and a locking member.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
A steering device 100 for a vehicle according to an embodiment of the present invention, to which the steering device 100 for a vehicle can be applied, is described below with reference to fig. 1 to 4.
As shown in fig. 1 to 4 in conjunction, a steering apparatus 100 of a vehicle according to an embodiment of the present invention may mainly include: the shell 10, the screw rod 20, the screw rod nut 30, the driving assembly 40 and the first driving wheel 50, wherein the screw rod 20, the first driving wheel 50 and the driving assembly 40 are all arranged in the shell 10, the shell 10 can protect the screw rod 20, the first driving wheel 50 and the driving assembly 40, erosion of external foreign matters can be prevented, or impact of external force damages the screw rod 20, the first driving wheel 50 and the driving assembly 40, and therefore the service life of the screw rod 20, the first driving wheel 50 and the driving assembly 40 can be prolonged.
Further, the lead screw nut 30 is sleeved on the lead screw 20, the lead screw nut 30 is in transmission fit with the lead screw 20, and the first transmission wheel 50 is sleeved on the lead screw nut 30 and is in transmission fit with the driving assembly 40. Specifically, the first driving wheel 50 is sleeved on the screw nut 30 and is in transmission fit with the driving assembly 40, the driving assembly 40 can drive the first driving wheel 50 to rotate, so that the first driving wheel 50 drives the screw nut 30 to rotate, transmission of torque from the first driving wheel 50 to the screw nut 30 can be achieved, the screw 20 is sleeved on the screw nut 30 and is in transmission fit with the screw 20, the screw nut 30 can drive the screw 20 to move, and therefore when the steering device 100 of the vehicle is arranged on the vehicle, steering of the vehicle can be achieved, and accordingly structural reliability of the steering device 100 of the vehicle can be further improved.
Further, the first transmission wheel 50 and the lead screw nut 30 are in interference fit, and at least one of the first transmission wheel 50 and the lead screw nut 30 is provided with the spline 321, specifically, because the hardness of the first transmission wheel 50 is different from that of the lead screw nut 30, when the hardness of the first transmission wheel 50 is set to be greater than that of the lead screw nut 30, the spline 321 can be arranged on the first transmission wheel 50, so that in the interference fit process of the first transmission wheel 50 and the lead screw nut 30, the spline 321 can extrude the position of the lead screw nut 30 corresponding to the spline 321 into a tooth-crest-shaped groove, and the tooth-crest-shaped groove can be in circumferential limit fit with the spline 321, so that slipping when the first transmission wheel 50 drives the lead screw nut 30 to rotate can be prevented, and the stability and reliability of transmission fit of the first transmission wheel 50 and the lead screw nut 30 can be improved.
Further, with such an arrangement, the axial disengaging force of the first driving wheel 50 and the lead screw nut 30 is greatly increased, so that the first driving wheel 50 and the lead screw nut 30 can be further prevented from being loosened or disengaged in the axial direction, and the mutual matching stability and reliability of the first driving wheel 50 and the lead screw nut 30 can be further improved.
Correspondingly, when the hardness of the first driving wheel 50 is less than that of the feed screw nut 30, the spline 321 may be disposed on the feed screw nut 30, and the effect is the same as that of disposing the spline 321 on the first driving wheel 50, which will not be described herein again.
From this, through with first drive wheel 50 and screw-nut 30 interference fit to make at least one of them set up spline 321, can guarantee under the prerequisite of first drive wheel 50 and screw-nut 30 concentricity, promote first drive wheel 50 and screw-nut 30 complex stability and fastness.
As shown in fig. 2 and 3, the feed screw nut 30 is provided with a smooth shaft portion 31 and an external spline portion 32 on an outer periphery thereof, the smooth shaft portion 31 is located on an axially outer side of the external spline portion 32, a spline 321 is provided on the external spline portion 32, an inner periphery of the first drive wheel 50 is provided with a mounting hole 51, and the mounting hole 51 is in interference fit with the external spline portion 32. Specifically, when the hardness of the first transmission wheel 50 is smaller than that of the screw nut 30, the smooth shaft portion 31 is arranged on the outer side of the outer spline portion 32 in the circumferential direction, in the interference fit process of the first transmission wheel 50 and the screw nut 30, the mounting hole 51 in the inner periphery of the first transmission wheel 50 is in limit fit with the smooth shaft portion 31 firstly and then is in interference fit with the spline 321 of the outer spline portion 32, the concentricity of the first transmission wheel 50 and the screw nut 30 can be guaranteed by the interference fit of the mounting hole 51 and the optical shaft portion 31, on the premise that the concentricity of the first transmission wheel 50 and the screw nut 30 is guaranteed, the mounting hole 51 is in interference fit with the spline 321 again, the spline 321 can extrude the tooth-top-shaped groove in the inner periphery of the mounting hole 51, and therefore the stability and the reliability of the transmission fit of the first transmission wheel 50 and the screw nut 30 can be improved.
Further, the outer diameter of the optical axis portion 31 is D1, the outer diameter of the external spline portion 32 is D2, the inner diameter of the mounting hole 51 is D3, and D1, D2, and D3 satisfy the following relations: d3 < D1 < D2. Specifically, the outer diameter of the optical axis portion 31 is set to be larger than the inner diameter of the mounting hole 51 and smaller than the outer diameter of the male spline portion 32, so that the spline 321 of the male spline portion 32 can be stably and reliably pressed against the inner circumference of the mounting hole 51 on the premise of ensuring the concentricity of the first transmission wheel 50 and the feed screw nut 30, and thus the structural design of the feed screw nut 30 can be further optimized.
The inner periphery of the first transmission wheel 50 is provided with a light hole portion and an internal spline portion, the light hole portion is located on one axial side of the internal spline portion, the feed screw nut 30 is provided with a light shaft portion 31, and the light shaft portion 31 is in interference fit with the light hole portion and the internal spline portion respectively. Specifically, when the hardness of the first transmission wheel 50 is greater than the hardness of the feed screw nut 30, the unthreaded hole portion is arranged on one axial side of the internally splined portion, and a part of the optical axis portion 31 is in interference fit with the unthreaded hole portion, so that the concentricity of the optical axis portion 31 and the unthreaded hole portion can be ensured, the other part of the optical axis portion 31 is in interference fit with the spline 321 of the internally splined portion, the spline 321 of the internally splined portion is used for pressing the other part of the optical axis portion 31, and the other part of the optical axis portion 31 is pressed out of the tooth-crest-shaped groove, so that the stability and reliability of the transmission fit of the first transmission wheel 50 and the feed screw nut 30 can be improved.
Further, the inner diameter of the optical aperture portion is D4, the inner diameter of the internally splined portion is D5, the inner diameter of the optical axis portion 31 is D6, and D4, D5 and D6 satisfy the following relations: d5 < D4 < D6. Specifically, the outer diameter of the unthreaded hole portion is set to be larger than the inner diameter of the internally splined portion and smaller than the outer diameter of the unthreaded shaft portion 31, so that the spline 321 of the internally splined portion can stably and reliably press the unthreaded shaft portion 31 on the premise of ensuring the concentricity of the first drive wheel 50 and the feed screw nut 30, and the structural design of the feed screw nut 30 can be further optimized.
As shown in fig. 1, the steering device 100 of the vehicle may further mainly include: bearing 60 and retaining member 64, bearing 60 sets up on the feed screw nut, and bearing 60 can mainly include: the screw rod nut comprises an inner ring 61, an outer ring 63 and a rolling element 62, wherein the rolling element 62 is arranged between the inner ring 61 and the outer ring 63, the inner ring 61 is in interference fit with the screw rod nut 30, and the outer ring 63 is fixed in the shell 10 through a locking element 64. Specifically, the inner ring 61 of the bearing 60 is in interference fit with the feed screw nut 30, and after the first driving wheel 50 drives the feed screw nut 30 to rotate, the feed screw nut 30 drives the inner ring 61 of the bearing 60 to rotate, because the rolling element 62 is arranged between the inner ring 61 and the outer ring 63, the rolling element 62 can follow the rolling of the inner ring 61 through rolling, so that the outer ring 63 is kept stable, and thus the stability and reliability of the circumferential rotation of the feed screw nut 30 can be improved.
Further, the outer race 63 of the bearing 60 is fixed to the housing 10 by the locking member 64, so that the bearing 60 is prevented from moving axially in the housing 10, and the lead screw nut 30 is caused to move axially in the housing 10, which further improves the structural reliability and stability of the steering apparatus 100 of the vehicle.
In addition, the screw nut 30 is provided with an abutting boss at one end of the bearing 60, and an anti-loosening member is provided at the other end, and the anti-loosening member and the abutting boss are mutually matched, so that the installation and setting of the bearing 60 on the screw nut 30 can be more stable and firm, and the structural reliability of the steering device 100 of the vehicle can be further improved.
As shown in fig. 1, the steering device 100 of the vehicle may further mainly include: the axial limiting part 21, the axial limiting part 21 is disposed on the screw rod 20, the housing 10 is provided with a limiting groove 11, and the axial limiting part 21 is axially limited and matched with the limiting groove 11. Specifically, trapezoidal and mutually meshed gears are arranged between the screw nut 30 and the screw 20, so that after the first driving wheel 50 drives the screw nut 30 to rotate, the gears on the screw nut 30 can be mutually meshed with the gears on the screw 20, and the circumferential rotation of the screw nut 30 is converted into the axial movement of the screw 20.
Further, by providing the axial limiting member 21 on the screw rod 20, the axial limiting member 21 can axially move in the limiting groove 11 along with the screw rod 20, and when the screw rod nut 30 drives the screw rod 20 to axially move to a certain distance, the axial limiting member 21 on the screw rod 20 and the housing can axially limit, so as to prevent the screw rod 20 from being disengaged from the screw rod nut 30, and thus, the reliability of the steering device 100 of the vehicle can be further improved.
As shown in fig. 1, the axial limiting member 21 may mainly include: the connecting rod 211 and the limiting block 212, the connecting rod 211 is connected between the screw rod 20 and the limiting block 212, and the limiting block 212 is slidably disposed in the limiting groove 11. Specifically, one end of the connecting rod 211 is inserted into the screw rod 20 and is fixedly connected to the screw rod 20, the other end of the connecting rod is fixedly connected to the limiting block 212, and the limiting block 212 can abut against the housing 10 when the screw rod 20 axially moves to a certain distance, so that the axial movement of the screw rod 20 is limited, and thus the stability and reliability of the axial limiting of the screw rod 20 by the axial limiting part 21 can be ensured. It should be noted that the limiting block 212 may be an elastic limiting block, which not only can ensure the stability of the axial limiting of the screw rod 20 by the axial limiting member 21, but also can prevent the damage of the housing 10 or the axial limiting member 21 caused by the limiting action of the limiting block 212 and the housing 10.
As shown in fig. 1, the driving assembly 40 may mainly include a driving member 41, a second driving wheel 42 and a transmission belt, the second driving wheel 42 is disposed on the driving member 41, the second driving wheel 42 and the first driving wheel 50 are in transmission fit through the transmission belt, and a diameter of the first driving wheel 50 is larger than a diameter of the second driving wheel 42. Specifically, the driving element 41 can drive the second transmission wheel 42 to rotate first, and since the second transmission wheel 42 is in transmission fit with the first transmission wheel 50 through the transmission belt, the second transmission wheel 42 can drive the first transmission wheel 50 to rotate through the transmission belt, further, the diameter of the first transmission wheel 50 is designed to be larger than that of the second transmission wheel 42, so that in the process that the second transmission wheel 42 transmits the force to the first transmission wheel 50 through the transmission belt, the effects of reducing the rotation speed and increasing the torque can be completed once, and thus, the effect of driving the screw nut 30 by the driving assembly 40 can be further improved, and the performance of the steering apparatus 100 of the vehicle can be further improved.
The vehicle according to the embodiment of the present invention may mainly include the above-mentioned steering apparatus 100 of the vehicle, two ends of the screw rod 20 of the steering apparatus 100 of the vehicle may be connected with the connecting shaft 22, the connecting shaft 22 is connected with a steering rod of the vehicle, the steering rod may be connected with wheels of the vehicle, and the axial movement of the screw rod 20 will drive the steering rod to move, so that the steering rod drives the wheels to steer, which may further improve the reliability of the vehicle.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the utility model.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A steering device for a vehicle, characterized by comprising:
a housing;
the screw rod is arranged in the shell;
the screw rod nut is sleeved on the screw rod and is in transmission fit with the screw rod;
a drive assembly disposed on the housing;
a first drive wheel, first drive wheel set up in the casing, first drive wheel cover is established on the screw-nut and with drive assembly transmission fit, first drive wheel with screw-nut interference fit and at least one are provided with the spline.
2. The vehicle steering device according to claim 1, wherein an outer periphery of the feed screw nut is provided with a plain shaft portion and an outer spline portion, the plain shaft portion is located axially outside the outer spline portion, the spline is provided in the outer spline portion, an inner periphery of the first drive wheel is provided with a mounting hole, and the mounting hole is in interference fit with the outer spline portion.
3. The steering apparatus for a vehicle according to claim 2, wherein an outer diameter of the light shaft portion is D1, an outer diameter of the externally splined portion is D2, an inner diameter of the mounting hole is D3, and D1, D2, and D3 satisfy the relation: d3 < D1 < D2.
4. The steering device for a vehicle according to claim 1, wherein a plain hole portion and an internal spline portion are provided on an inner periphery of the first drive wheel, the plain hole portion being located on one axial side of the internal spline portion, and the feed screw nut is provided with a plain shaft portion that is interference-fitted with the plain hole portion and the internal spline portion, respectively.
5. The steering apparatus for a vehicle according to claim 4, wherein an inner diameter of the light hole portion is D4, an inner diameter of the internally splined portion is D5, an inner diameter of the light shaft portion is D6, and D4, D5 and D6 satisfy the relation: d5 < D4 < D6.
6. The steering device for a vehicle according to claim 1, further comprising: bearing and retaining member, the bearing set up in screw-nut is last, the bearing includes: the rolling part is arranged between the inner ring and the outer ring, the inner ring is in interference fit with the screw rod nut, and the outer ring is fixed in the shell through the locking part.
7. The steering device for a vehicle according to claim 1, further comprising: the axial limiting part is arranged on the screw rod, the shell is provided with a limiting groove, and the axial limiting part is in axial limiting fit with the limiting groove.
8. The steering device for a vehicle according to claim 7, wherein the axial stopper includes: connecting rod and stopper, the connecting rod connect in the lead screw with between the stopper, stopper slidable ground set up in the spacing inslot.
9. The steering apparatus of a vehicle according to claim 1, wherein the driving assembly includes a driving member, a second transmission wheel and a transmission belt, the second transmission wheel is disposed on the driving member, the second transmission wheel and the first transmission wheel are in transmission engagement through the transmission belt, and a diameter of the first transmission wheel is larger than a diameter of the second transmission wheel.
10. A vehicle, characterized by comprising: a steering device of a vehicle according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122616490.6U CN216969790U (en) | 2021-10-28 | 2021-10-28 | Vehicle steering device and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122616490.6U CN216969790U (en) | 2021-10-28 | 2021-10-28 | Vehicle steering device and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216969790U true CN216969790U (en) | 2022-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122616490.6U Active CN216969790U (en) | 2021-10-28 | 2021-10-28 | Vehicle steering device and vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN216969790U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116873033A (en) * | 2023-08-16 | 2023-10-13 | 上海同驭汽车科技有限公司 | Steering actuator structure, steering method, steering system and vehicle |
-
2021
- 2021-10-28 CN CN202122616490.6U patent/CN216969790U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116873033A (en) * | 2023-08-16 | 2023-10-13 | 上海同驭汽车科技有限公司 | Steering actuator structure, steering method, steering system and vehicle |
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