CN220785892U - Electric power steering system and all-terrain vehicle - Google Patents

Abstract

The utility model discloses an electric power steering system and an all-terrain vehicle, wherein the electric power steering system comprises a motor, a speed reducer, a steering column, a steering handle, an auxiliary connecting rod and a steering pull rod, a motor shaft of the motor is coaxially connected with an input shaft of the speed reducer, the steering column is coaxially connected with an output shaft of the speed reducer, the steering handle is connected with the upper end of the steering column, the length direction of the auxiliary connecting rod is angled to the axial direction of the steering column, a first end of the auxiliary connecting rod is connected with the lower end of the steering column, a second end of the auxiliary connecting rod is hinged with the first end of the steering pull rod, a second end of the steering pull rod is hinged with a steering knuckle on a front wheel, wherein the motor is positioned on one side of the steering wheel facing a first reference surface, and the first reference surface is a vertical surface where the axis of the steering column is positioned. The electric power steering system provided by the utility model has the advantages of small space occupation in the length direction of the vehicle, high flexibility in the dimension design of the vehicle in the length direction and high utilization rate of the space in the vehicle.

Description

Electric power steering system and all-terrain vehicle

Technical Field

The utility model relates to the technical field of all-terrain vehicles, in particular to an electric power steering system and an all-terrain vehicle.

Background

An EPS (Electric Power Steering ) is a power steering system that directly relies on a motor to provide assist torque, and is mainly composed of a torque sensor, a vehicle speed sensor, a motor, a speed reducer, an Electronic Control Unit (ECU), and the like. The motor shaft of the EPS motor is often arranged on the vehicle along the length direction of the vehicle, the motor and the speed reducer of the electric power steering system are easy to cause to occupy the larger space of the length direction of the vehicle, the vehicle is required to be larger in the size design of the length direction so as to be convenient for the installation of the electric power steering system, and at the moment, the defects of poor appearance and unreasonable utilization of the inner space of the vehicle are caused.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

Therefore, the embodiment of the utility model provides an electric power steering system, which has the advantages of small space occupation in the length direction of a vehicle, high flexibility in the dimension design of the vehicle in the length direction and high utilization rate of the space in the vehicle.

The embodiment of the utility model also provides an all-terrain vehicle.

The electric power steering system comprises a motor, a speed reducer, a steering column, a steering handle, an auxiliary connecting rod and a steering pull rod, wherein a motor shaft of the motor is coaxially connected with an input shaft of the speed reducer; the steering column is coaxially connected with the output shaft of the speed reducer; the steering handle is connected with the upper end of the steering column, the length direction of the auxiliary connecting rod is angled with the axial direction of the steering column, the first end of the auxiliary connecting rod is connected with the lower end of the steering column, the second end of the auxiliary connecting rod is hinged with the first end of the steering pull rod, the second end of the steering pull rod is hinged with a steering knuckle on a front wheel, wherein the motor is located on one side of a first reference surface facing the wheel, and the first reference surface is a vertical surface where the axis of the steering column is located.

According to the electric power steering system provided by the embodiment of the utility model, after the motor and the speed reducer are arranged on the frame of the vehicle, when the steering handle is rotated to drive the steering column to rotate, the motor also drives the steering column to rotate through the speed reducer so as to reduce the steering handle rotation difficulty, and at the moment, the steering column drives the steering knuckle to rotate relative to the frame through the auxiliary connecting rod and the steering pull rod, so that the front wheel steering operation is realized. Wherein, through setting up the motor and being located the first reference face and facing the one side of front wheel, motor and reduction gear are arranged along the width direction of vehicle generally, have effectively improved the space utilization in the width direction in the vehicle this moment, and the design flexibility ratio of the size of vehicle in the length direction is higher.

In some embodiments, the angle α between the vertical plane of the axis of the motor shaft of the motor and the first reference plane is 45 ° -135 °.

In some embodiments, the angle α between the vertical plane of the axis of the motor shaft of the motor and the first reference plane is 90 ° -135 °, wherein the motor is located diagonally behind the reducer when the angle α between the vertical plane of the axis of the motor shaft of the motor and the first reference plane is 135 °.

In some embodiments, the steering column comprises an upper steering column and a lower steering column, the upper end of the upper steering column is connected with the steering handle, the lower end of the upper steering column is connected with the upper end of the lower steering column through a universal joint, the lower end of the lower steering column is connected with the first section of the auxiliary connecting rod, the speed reducer comprises a worm and a worm wheel sleeve which are connected in a transmission way, the worm is coaxially connected with a motor shaft of the motor, and the lower steering column is matched in the worm wheel sleeve and is coaxially connected with the worm wheel sleeve.

In some embodiments, the front wheels include a left front wheel and a right front wheel, the auxiliary link and the steering tie rod are two and one-to-one, wherein a second end of one steering tie rod is suitable for hinging with a knuckle of the left front wheel, a second end of the other steering tie rod is suitable for hinging with a knuckle of the right front wheel, the motor is positioned on one side of the first datum plane towards the left front wheel, or the motor is positioned on one side of the first datum plane towards the right front wheel.

In some embodiments, the motor is located above the second end of the steering linkage.

An all-terrain vehicle in accordance with an embodiment of the present utility model includes a frame to which the motor and the decelerator are mounted, a front suspension assembly pivotally connected to each of the frame and the knuckle of the front wheel, a front wheel, and an electric power steering system as in any of the embodiments described above.

Technical advantages of the all-terrain vehicle according to the embodiment of the present utility model are the same as those of the electric power steering system of the above embodiment, and will not be described here again.

In some embodiments, the front suspension assembly includes an upper swing arm, a first end of the upper swing arm being pivotally connected to the knuckle, a second end of the upper swing arm being pivotally connected to the frame, a projection of the motor being above the projection of the upper swing arm on a projection plane perpendicular to a length direction of the frame, and a projection of the motor being behind the projection of the upper swing arm on a projection plane perpendicular to a height direction of the frame.

In some embodiments, the front suspension assembly further comprises a front lower rocker arm and a rear lower rocker arm, a first end of the front lower rocker arm and a first end of the rear lower rocker arm are both pivotally connected to the knuckle, a second end of the front lower rocker arm and a second end of the rear lower rocker arm are both pivotally connected to the frame, the motor is located above the front lower rocker arm and the rear lower rocker arm and on a projection plane perpendicular to a height direction of the frame, and projections of the second end of the front lower rocker arm, the motor and the second end of the rear lower rocker arm are arranged at intervals along a length direction of the frame.

In some embodiments, the steering tie rod is located on a side of a second datum surface facing the rear wheels of the ATV, the second datum surface being a vertical surface coincident with the central axis of the front wheels.

Drawings

Fig. 1 is a top view of an electric power steering system according to an embodiment of the utility model.

Fig. 2 is a side view of an electric power steering system according to an embodiment of the utility model.

Reference numerals:

1. An electric power steering system; 11. a motor; 12. a speed reducer; 13. an upper steering column; 14. a lower steering column; 15. a steering handle; 16. an auxiliary connecting rod; 17. a steering tie rod; 3. an upper rocker arm; 4. a front lower rocker arm; 5. a rear lower rocker arm; 6. a left front wheel; 61. a knuckle; 7. a right front wheel; x-a first datum plane; y-a second datum plane.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

An electric power steering system 1 according to an embodiment of the utility model is described below with reference to fig. 1 and 2.

The electric power steering system 1 according to the embodiment of the utility model includes a motor 11, a speed reducer 12, a steering column, a steering handle 15, an auxiliary link 16, and a steering tie rod 17. The motor shaft of the motor 11 is coaxially connected with the input shaft of the speed reducer 12. The steering column is coaxially connected to the output shaft of the speed reducer 12. The steering handle 15 is connected to the upper end of the steering column, the length direction of the auxiliary link 16 is angled with respect to the axial direction of the steering column, the first end of the auxiliary link 16 is connected to the lower end of the steering column, the second end of the auxiliary link 16 is hinged to the first end of the steering tie rod 17, and the second end of the steering tie rod 17 is adapted to be hinged to the knuckle 61 on the front wheel. The motor 11 is located on a side of the first reference plane X facing the wheel, and the first reference plane X is a vertical plane on which the axis of the steering column is located.

According to the electric power steering system 1 of the embodiment of the utility model, after the motor 11 and the speed reducer 12 are installed on the frame of the vehicle, when the steering handle 15 is rotated to drive the steering column to rotate automatically, the motor 11 also drives the steering column to rotate through the speed reducer 12 to reduce the rotation difficulty of the steering handle 15, and at this time, the steering column drives the steering knuckle 61 to rotate relative to the frame through the auxiliary connecting rod 16 and the steering pull rod 17, so that the front wheel steering operation is realized. Wherein, through setting up motor 11 and being located the one side of first reference plane X towards the front wheel, motor 11 and reduction gear 12 are arranged along the width direction of vehicle generally, have effectively improved the space utilization in the width direction in the vehicle this moment, and the design flexibility of the size of vehicle in the length direction is higher.

The wheel may be any one of a front wheel and a rear wheel of the vehicle, and the motor 11 is located on a side of the first reference plane X facing the wheel, which means that the motor 11 is located on any side of the first reference plane X and does not intersect the first reference plane X. The width direction of the vehicle is the left-right direction of the vehicle, and the longitudinal direction of the vehicle is the front-rear direction of the vehicle. The motor 11 and the decelerator 12 are larger in the overall dimension in the axial direction of the motor shaft of the motor 11, so that the motor 11 and the decelerator 12 can be reduced in the dimension in the longitudinal direction of the vehicle when they are aligned in the vehicle width direction in general.

In some embodiments, the angle α between the vertical plane in which the axis of the motor shaft of the motor 11 lies and the first reference plane X is 45 ° -135 °.

At this time, the motor 11 may be completely located on the left side or the right side of the first reference plane X, and the space occupation of both the motor 11 and the speed reducer 12 in the vehicle length direction can be reduced, so that the space utilization of the vehicle in the width direction is effectively improved.

In some embodiments, the angle α between the vertical plane in which the axis of the motor shaft of the motor 11 lies and the first reference plane X is 90 ° -135 °. When the angle α between the vertical plane of the axis of the motor shaft of the motor 11 and the first reference plane X is 135 °, the motor 11 is located obliquely behind the speed reducer 12.

That is, the motor 11 may be positioned on the left side, the right side, the left rear side, or the right rear side of the speed reducer 12, and can be mounted on the frame of the vehicle more flexibly without affecting other parts in the vehicle.

As shown in fig. 1, the angle α between the vertical plane on which the axis of the motor shaft of the motor 11 is located and the first reference plane X is 90 °. At this time, the motor 11 and the speed reducer 12 occupy the smallest space in the vehicle longitudinal direction, and the highest space utilization in the vehicle width direction.

In some embodiments, as shown in fig. 2, the steering column includes an upper steering column 13 and a lower steering column 14. The upper end of the upper steering column 13 is connected to the steering handle 15, the lower end of the upper steering column 13 is connected to the upper end of the lower steering column 14 by a universal joint, and the lower end of the lower steering column 14 is connected to the first section of the auxiliary link 16. The speed reducer 12 comprises a worm and a worm wheel sleeve which are connected in a transmission way, wherein the worm is coaxially connected with a motor shaft of the motor 11, and the lower steering column 14 is matched in the worm wheel sleeve and is coaxially connected with the worm wheel sleeve.

The arrangement of the universal joint ensures that the upper steering column 13 and the lower steering column 14 can rotate at an angle and synchronously, so that the inclination angle of the upper steering column 13 is adjustable, the position of the steering handle 15 relative to a driver is adjustable, and the use requirements of different users are facilitated. At this time, the speed reducer 12 is coaxially connected to the lower steering column 14 via a worm wheel sleeve, so that the auxiliary steering operation can be realized.

Specifically, as shown in fig. 1, the front wheels include a left front wheel 6 and a right front wheel 7, and the auxiliary link 16 and the steering tie rod 17 are two and one-to-one. The second end of one of the steering links 17 is adapted to be articulated with the knuckle 61 of the left front wheel 6, and the second end of the other steering link 17 is adapted to be articulated with the knuckle 61 of the right front wheel 7. The motor 11 is located on the side of the first reference plane X toward the left front wheel 6, or the motor 11 is located on the side of the first reference plane X toward the right front wheel 7.

In some embodiments, as shown in FIG. 2, the motor 11 is located above the second end of the tie rod 17.

At this time, the angle between the axial direction and the vertical direction of the lower steering column 14 is smaller, the electric power steering system 1 as a whole occupies a smaller space in the longitudinal direction of the vehicle, and the space utilization in the height direction of the vehicle is higher.

An all-terrain vehicle according to an embodiment of the present utility model includes a frame to which a motor 11 and a decelerator 12 are mounted, a front suspension assembly pivotally connected to each of the frame and a knuckle 61 of the front wheel, and the electric power steering system 1 of any of the above embodiments.

Technical advantages of the all-terrain vehicle according to the embodiment of the present utility model are the same as those of the electric power steering system 1 of the above embodiment, and will not be described here again.

In some embodiments, as shown in fig. 1 and 2, the front suspension assembly includes an upper swing arm 3, a first end of the upper swing arm 3 being pivotally connected to a knuckle 61, a second end of the upper swing arm 3 being pivotally connected to the vehicle frame, a projection of the motor 11 being above a projection of the upper swing arm 3 on a projection plane perpendicular to a length direction of the vehicle frame, and a projection of the motor 11 being behind a projection of the upper swing arm 3 on a projection plane perpendicular to a height direction of the vehicle frame.

Therefore, the space utilization rate of the width direction inside the all-terrain vehicle is improved, the motor 11 is effectively prevented from interfering with the upper rocker arm 3, and the power-assisted reliability of the electric power-assisted steering system 1 is higher.

Specifically, as shown in fig. 1 and 2, the left and right front wheels 6 and 7 each correspond to two upper rocker arms 3, first ends of the two upper rocker arms 3 are pivotally connected to the knuckle 61, and second ends of the two upper rocker arms 3 are arranged at intervals along the length direction of the vehicle frame and are both pivotally connected to the vehicle frame.

In some embodiments, as shown in fig. 1 and 2, the front suspension assembly further includes a front lower rocker arm 4 and a rear lower rocker arm 5. The first end of the front lower rocker 4 and the first end of the rear lower rocker 5 are both pivotally connected to the knuckle 61, and the second end of the front lower rocker 4 and the second end of the rear lower rocker 5 are both pivotally connected to the frame. The motor 11 is located above the front lower rocker 4 and the rear lower rocker 5, and on a projection plane perpendicular to the height direction of the vehicle frame, projections of the second end of the front lower rocker 4, projections of the motor 11, and projections of the second end of the rear lower rocker 5 are arranged at intervals along the length direction of the vehicle frame.

The second ends of the front lower rocker arm 4 and the rear lower rocker arm 5 are pivotally connected with the frame through bushings, and the motor 11 is located above the front lower rocker arm 4 and the rear lower rocker arm 5 and between the second ends of the front lower rocker arm 4 and the rear lower rocker arm 5, so that interference with the motor 11 when the front lower rocker arm 4 and the rear lower rocker arm 5 pivot relative to the frame and the knuckle 61 is effectively avoided, and the power-assisted reliability of the electric power-assisted steering system 1 is further improved.

In some embodiments, as shown in fig. 1 and 2, the steering tie rod 17 is located on a side of the second reference plane Y toward the rear wheels of the all-terrain vehicle, the second reference plane Y being a vertical plane coincident with the central axis of the front wheels.

At this time, the electric power steering system 1 is generally located at the rear side of the front suspension assembly, and the electric power steering system 1 is not easily damaged by external collision under the protection of the front suspension assembly, and the steering reliability of the all-terrain vehicle is high.

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.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., 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, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.

Claims (10)

1. An electric power steering system, comprising:

the motor shaft of the motor is coaxially connected with the input shaft of the speed reducer;

the steering column is coaxially connected with the output shaft of the speed reducer; and

A steering handle, an auxiliary connecting rod and a steering pull rod, wherein the steering handle is connected with the upper end of the steering column, the length direction of the auxiliary connecting rod is angled with the axial direction of the steering column, the first end of the auxiliary connecting rod is connected with the lower end of the steering column, the second end of the auxiliary connecting rod is hinged with the first end of the steering pull rod, the second end of the steering pull rod is used for being hinged with a steering knuckle on a front wheel,

The motor is located on one side of a first reference surface facing the wheel, and the first reference surface is a vertical surface where the axis of the steering column is located.

2. An electric power steering system according to claim 1, wherein the angle α between the vertical plane of the motor shaft axis of the motor and the first reference plane is 45 ° -135 °.

3. The electric power steering system according to claim 2, wherein an angle α between a vertical plane in which an axis of a motor shaft of the motor is located and the first reference plane is 90 ° to 135 °, and wherein the motor is located obliquely rearward of the speed reducer when the angle α between the vertical plane in which the axis of the motor shaft of the motor is located and the first reference plane is 135 °.

4. The electric power steering system of claim 1, wherein the steering column includes an upper steering column and a lower steering column, the upper end of the upper steering column being coupled to the steering handle, the lower end of the upper steering column being coupled to the upper end of the lower steering column by a universal joint, the lower end of the lower steering column being coupled to the first section of the auxiliary link, the decelerator including a worm and a worm gear housing in driving connection, the worm being coaxially coupled to a motor shaft of the motor, and the lower steering column being fitted within the worm gear housing and being coaxially coupled to the worm gear housing.

5. The electric power steering system according to claim 1, wherein the front wheels include a left front wheel and a right front wheel, the auxiliary link and the steering tie rod each have two and one-to-one correspondence, one of the steering tie rod having a second end adapted to be hinged with a knuckle of the left front wheel and the other steering tie rod having a second end adapted to be hinged with a knuckle of the right front wheel, the motor being located on a side of the first reference surface facing the left front wheel or the motor being located on a side of the first reference surface facing the right front wheel.

6. An electric power steering system according to any one of claims 1 to 5, wherein the motor is located above the second end of the steering linkage.

7. An all-terrain vehicle comprising a frame, a front suspension assembly, a front wheel, and an electric power steering system as recited in any of claims 1-6, said motor and said decelerator being mounted to said frame, said front suspension assembly being pivotally connected to each of said frame and a knuckle of said front wheel.

8. The all-terrain vehicle of claim 7, wherein the front suspension assembly includes an upper swing arm, a first end of the upper swing arm being pivotally coupled to the knuckle, a second end of the upper swing arm being pivotally coupled to the frame, a projection of the motor being above the projection of the upper swing arm on a projection plane perpendicular to a length direction of the frame, and a projection of the motor being behind the projection of the upper swing arm on a projection plane perpendicular to a height direction of the frame.

9. The all-terrain vehicle of claim 7, wherein the front suspension assembly further comprises a front lower rocker and a rear lower rocker, the first end of the front lower rocker and the first end of the rear lower rocker are both pivotally connected to the knuckle, the second end of the front lower rocker and the second end of the rear lower rocker are both pivotally connected to the frame, the motor is located above the front lower rocker and the rear lower rocker, and on a projection plane perpendicular to a height direction of the frame, a projection of the second end of the front lower rocker, a projection of the motor, and a projection of the second end of the rear lower rocker are spaced apart along a length direction of the frame.

10. The all-terrain vehicle of claim 7, characterized in that the steering tie is located on a side of a second datum surface facing toward a rear wheel of the all-terrain vehicle, the second datum surface being a vertical surface coincident with a central axis of the front wheel.