CN216102359U

CN216102359U - Transmission device of automobile electric power-assisted system

Info

Publication number: CN216102359U
Application number: CN202122151302.7U
Authority: CN
Inventors: 袁尉铭
Original assignee: Sichuan Hope Automobile Technician College
Current assignee: Sichuan Hope Automobile Technician College
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2022-03-22
Anticipated expiration: 2031-09-07

Abstract

The utility model provides a transmission device of an automobile electric power-assisted system, which is characterized in that a mounting plate, a steering gear and a steering pull rod are mounted on a rack; the steering pull rod penetrates through the steering gear and moves in a reciprocating mode in the horizontal direction under the driving of the steering gear; a sleeve is erected on the mounting plate along the longitudinal direction through a fixing rod, a driven shaft is matched in the sleeve in a sliding mode, the lower end of the driven shaft is in transmission connection with an input shaft of a steering gear, and a driven gear is fixedly connected to the upper end of the driven shaft; a first steering shaft is arranged on the mounting plate through a first frame plate and a second frame plate rotating frame; a driving gear is fixedly arranged on the first steering shaft, the driving gear is meshed with the driven gear, and the thickness of the driving gear is larger than that of the driven gear; the outer side of the second frame plate is fixedly provided with a motor, and an output shaft of the motor is in transmission connection with the first steering shaft. The device can avoid the influence of steering spindle axial runout to helping hand system and operation feel.

Description

Transmission device of automobile electric power-assisted system

Technical Field

The utility model relates to the technical field of automobile engineering, in particular to a transmission device of an automobile electric power-assisted system.

Background

An Electric Power Steering (EPS) system is a brand-new Electric Power electronic servo system, has the advantages of fuel saving, environmental protection, controllable Steering feeling and the like compared with a traditional Hydraulic Power Steering (HPS) system, and meets the electronic and intelligent requirements of a new generation of Electric automobiles and intelligent automobiles. The design of the power-assisted transmission mechanism should consider the size of the installation space of the steering mechanism on the automobile, and the structure should be as simple and compact as possible.

The existing electric power steering system adopts a worm and gear transmission structure and a direct transmission primary transmission mode, however, when an automobile runs on an uneven road surface, a connecting wheel is easy to vibrate up and down, so that a steering shaft is caused to axially jump, the control of a steering wheel on the direction and the operation hand feeling of a driver are influenced, and the power steering system is easy to damage.

Therefore, the utility model provides a transmission device of an electric power-assisted system of an automobile.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present invention provides a transmission device for an electric power assisting system of an automobile. The device can avoid the influence of steering spindle axial runout to helping hand system and operation feel.

In order to achieve the above purpose, the present invention provides the following technical solutions.

A transmission device of an automobile electric power-assisted system comprises a mounting plate, a steering gear and a steering pull rod, wherein the mounting plate, the steering gear and the steering pull rod are mounted on a rack; the steering pull rod penetrates through the steering gear and is driven by the steering gear to reciprocate along the horizontal direction;

a sleeve is erected on the mounting plate along the longitudinal direction through a fixing rod, a driven shaft is matched in the sleeve in a sliding mode, the lower end of the driven shaft is in transmission connection with an input shaft of the steering gear, and the upper end of the driven shaft is fixedly connected with a driven gear;

a first steering shaft is arranged on the mounting plate through a first frame plate and a second frame plate rotating frame; a driving gear is fixedly arranged on the first steering shaft, the driving gear is meshed with the driven gear, and the thickness of the driving gear is larger than that of the driven gear;

the outer side of the second frame plate is fixedly provided with a motor, and an output shaft of the motor is in transmission connection with the first steering shaft.

Preferably, the first steering shaft is connected with a second steering shaft through a spherical structure; and the end part of the second steering shaft is fixedly connected with a steering wheel.

Preferably, the spherical structure comprises a ball bearing and a ball joint; two first support plates and two second support plates are respectively fixed at the opposite ends of the first steering shaft and the second steering shaft; the ball joint is fixedly arranged between the two second support plates through a first rotating shaft; the ball bearing is fixedly arranged between the two first supporting plates through a second rotating shaft; the ball joint is matched with the spherical surface of the ball bearing.

Preferably, the diverter includes a housing with a cavity and a drive gear disposed within the housing; the input shaft penetrates through the shell and is in rotary connection with the shell; the driving gear is fixedly connected with the input shaft; the steering pull rod is of a two-end type, and the middle of the steering pull rod is connected through a rack; the steering pull rod penetrates through the shell and is in rotary connection with the shell; the rack is meshed with the driving gear.

Preferably, the two ends of the steering pull rod are rotatably connected with connecting shafts, and the end parts of the connecting shafts are connected with wheels through ball bearings.

Preferably, the steering rod sleeve is provided with a shroud.

The utility model has the beneficial effects that:

the utility model provides a transmission device of an automobile electric power-assisted system, which divides a steering shaft into a driving shaft and a driven shaft, and increases steering torque through a motor and a primary gear transmission when driving steering so as to more conveniently realize the change of steering; when the wheels run on an uneven road surface, axial runout is generated, and the first steering shaft and the driven shaft adopt a gear transmission mode, so that the driven gear moves in the axial direction of the driving gear but does not disengage from meshing, the influence of the axial runout on the steering shaft is small, and the steering operation on a steering wheel is not influenced.

Drawings

FIG. 1 is an overall structural view of a transmission of an electric power assist system of an automobile according to an embodiment of the present invention;

FIG. 2 is a partial block diagram of an automotive electric power assist system transmission in accordance with an embodiment of the present invention;

fig. 3 is a bottom structural view of a transmission of an electric power assist system of an automobile according to an embodiment of the present invention.

In the figure: 1. a steering wheel; 2. a second steering shaft; 3. a first steering shaft; 4. a first frame plate; 5. a driving gear; 6. a wheel; 7. a connecting shaft; 8. a shield; 9. a steering tie rod; 10. a diverter; 11. a driven shaft; 12. a sleeve; 13. a second frame plate; 14. a driven gear; 15. mounting a plate; 16. a first support plate; 17. a second support plate; 18. a ball bearing; 19. a ball joint; 20. a rack; 21. a drive gear; 22. an electric motor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Examples

An electric power-assisted system transmission device of an automobile, as shown in figures 1-3, comprises a mounting plate 15 and a steering gear 10 which are arranged on a frame; the steering gear 10 passes through the steering tie rod 9 and drives the steering tie rod 9 to move horizontally. Specifically, as shown in fig. 1, two ends of the steering linkage 9 are rotatably connected with connecting shafts 7, the end parts of the connecting shafts 7 are connected with wheels 6 through ball bearings 18 to realize transmission, and the steering linkage 9 is sleeved with a protective cover 8 to realize dust prevention.

Specifically, as shown in fig. 3, the steering gear 10 includes a housing with a cavity and a drive gear 21 disposed within the housing; the driving gear 21 is fixedly connected with an input shaft of the steering gear 10; the steering pull rod 9 is of a two-end type, and the middle is connected through a rack 20; the steering pull rod 9 penetrates through the shell and is in rotary connection with the shell; the rack 20 is engaged with a drive gear 21. The horizontal movement of the steering pull rod 9 is realized by adopting a gear and rack transmission mode, and further the rotation of the wheels 6 is realized.

Further, the top of the mounting plate 15 is provided with a sleeve 12 through a fixed rod fixing frame, a driven shaft 11 is matched in the sleeve 12 in a sliding manner, and one end of the driven shaft 11 is in transmission connection with an input shaft of the steering gear 10; the other end of the driven shaft 11 is fixedly connected with a driven gear 14; specifically, as shown in fig. 3 and 1. The top of the mounting plate 15 is rotatably provided with a first steering shaft 3 through a first frame plate 4 and a second frame plate 13; the driving gear 5 is fixedly arranged on the shaft of the first steering shaft 3, the driving gear 5 is meshed with the driven gear 14, the thickness of the driving gear 5 is larger than that of the driven gear 14, when the driven shaft 11 axially jumps, the axial position of the steering shaft is not affected, and meanwhile, the driven gear 14 is prevented from being disengaged.

An electric motor 22 is fixedly arranged on the outer side of the second frame plate 13, and as shown in fig. 3, an output shaft of the electric motor 22 is in transmission connection with the first steering shaft 3 for supplementing torque.

Preferably, the first steering shaft 3 is connected with the second steering shaft 2 through a spherical structure; the end of the second steering shaft 2 is fixedly connected with a steering wheel 1, and as shown in fig. 2 in particular, the spherical structure comprises a ball bearing 18 and a ball joint 19; two first support plates 16 and two second support plates 17 are respectively fixed at the opposite ends of the first steering shaft 3 and the second steering shaft 2; the ball joint 19 is fixedly arranged between the two second support plates 17 through a first rotating shaft; the ball bearing 18 is fixedly arranged between the two first supporting plates 16 through a second rotating shaft; the ball joint 19 is spherically fitted with the ball bearing 18. The whole structure is stable, and the rotation of the steering wheel 1 is not influenced to drive the first steering shaft 3 to rotate.

In this embodiment:

when the steering wheel 1 is rotated and the torque of the reaction force generated by the friction between the wheels 6 and the ground is detected to be larger, the motor 22 is driven to rotate, so that the torque is enhanced, and the steering shaft is convenient to rotate; the steering wheel 1 rotates to drive the second steering shaft 2 to rotate, and the second steering shaft 3 is driven to rotate; the first steering shaft 3 rotates to drive the driving gear 5 to rotate, and the driven gear 14 is driven to rotate through first-order transmission, so that the driven shaft 11 is driven to rotate.

Further, the driven shaft 11 drives the driving gear 21 to rotate, and drives the rack 20 to move in the horizontal direction, so that the steering rod 9 moves in the horizontal direction, and finally, the angle change of the two wheels 6 is realized.

When the road surface is not flat, the wheel 6 jumps, and further the driven shaft 11 jumps axially. Because the first-stage transmission adopts gear transmission, and the thickness of the driven gear 14 is smaller than that of the driving gear 5, the driven gear 14 cannot be separated from the driving gear 5, and the axial jumping does not influence the steering operation of the steering wheel 1.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The transmission device of the automobile electric power-assisted system is characterized by comprising a mounting plate (15), a steering gear (10) and a steering pull rod (9), wherein the mounting plate is mounted on a rack; the steering pull rod (9) penetrates through the steering gear (10) and is driven by the steering gear (10) to reciprocate in the horizontal direction;

a sleeve (12) is erected on the mounting plate (15) along the longitudinal direction through a fixing rod, a driven shaft (11) is matched in the sleeve (12) in a sliding mode, the lower end of the driven shaft (11) is in transmission connection with an input shaft of the steering gear (10), and a driven gear (14) is fixedly connected to the upper end of the driven shaft;

a first steering shaft (3) is arranged on the mounting plate (15) through a first frame plate (4) and a second frame plate (13) rotating frame; a driving gear (5) is fixedly arranged on the first steering shaft (3), the driving gear (5) is meshed with the driven gear (14), and the thickness of the driving gear is larger than that of the driven gear (14);

and a motor (22) is fixedly arranged on the outer side of the second frame plate (13), and an output shaft of the motor (22) is in transmission connection with the first steering shaft (3).

2. The transmission of an electric power assisted system of a motor vehicle according to claim 1, characterized in that the first steering shaft (3) is connected with the second steering shaft (2) by a spherical structure; the end part of the second steering shaft (2) is fixedly connected with a steering wheel (1).

3. The automotive electric power assist system transmission of claim 2, characterized in that the spherical structure includes a ball bearing (18) and a ball joint (19); two first support plates (16) and two second support plates (17) are respectively fixed at the opposite ends of the first steering shaft (3) and the second steering shaft (2); the ball joint (19) is fixedly arranged between the two second support plates (17) through a first rotating shaft; the ball bearing (18) is fixedly arranged between the two first support plates (16) through a second rotating shaft; the ball joint (19) is matched with the ball bearing (18) in a spherical way.

4. The automotive electric power assist system transmission of claim 1, characterized in that the steering gear (10) includes a housing with a cavity and a drive gear (21) disposed within the housing; the input shaft penetrates through the shell and is in rotary connection with the shell; the driving gear (21) is fixedly connected with the input shaft; the steering pull rod (9) is of a two-end type, and the middle of the steering pull rod is connected through a rack (20); the steering pull rod (9) penetrates through the shell and is in rotary connection with the shell; the rack (20) is meshed with the driving gear (21).

5. The transmission device of the automobile electric power-assisted system according to claim 3, characterized in that the two ends of the steering pull rod (9) are rotatably connected with connecting shafts (7), and the ends of the connecting shafts (7) are connected with wheels (6) through ball bearings (18).

6. The transmission of an electric power assisted system of a motor vehicle according to claim 1, characterized in that the steering rod (9) is sheathed with a shield (8).