CN221090963U

CN221090963U - Steering transmission shaft and double-wishbone suspension kingpin steering mechanism using same

Info

Publication number: CN221090963U
Application number: CN202322826645.8U
Authority: CN
Inventors: 李红海; 卫清泉; 刘昊
Original assignee: Qingche Zhixing Suzhou Electronic Technology Co ltd
Current assignee: Qingche Zhixing Suzhou Electronic Technology Co ltd
Priority date: 2023-10-20
Filing date: 2023-10-20
Publication date: 2024-06-07
Anticipated expiration: 2033-10-20

Abstract

The utility model relates to the field of vehicle manufacturing, in particular to a steering transmission shaft which comprises an input shaft, a star-shaped sleeve, a plurality of steel balls, a ball cage type retainer, a clamping ring and a spherical sleeve, wherein the star-shaped sleeve is in spline connection with the bottom of the input shaft, a plurality of inner raceways which are in curved surface groove shapes are arranged on the outer surface of the star-shaped sleeve, corresponding outer raceways which are in curved surface groove shapes are arranged on the inner surface of the ball cage type sleeve, the ball cage type retainer is arranged between the star-shaped sleeve and the spherical sleeve so as to limit the steel balls at the inner raceways one by one, window holes for the steel balls to extend out are formed in the circumferential direction of the ball cage type retainer, and the clamping ring is assembled between the spherical sleeve and the ball cage type retainer so as to limit the ball cage type retainer axially. The steering transmission shaft, the electric steering gear and the steering knuckle are connected through the spline, so that the connection is simple, the assembly is easy, and the assembly error can be absorbed.

Description

Steering transmission shaft and double-wishbone suspension kingpin steering mechanism using same

Technical Field

The utility model relates to the field of vehicle manufacturing, in particular to a novel double-wishbone suspension kingpin steering mechanism.

Background

The chassis wheel edge configuration of the kingpin steering is capable of enabling the chassis to have more movement flexibility by structurally allowing larger wheel angles and matching four-wheel independent steering control because a transverse pull rod steering device of a traditional vehicle is eliminated, realizing multiple movement modes such as in-situ steering, crab steering and the like, and realizing a new framework of the drive-by-wire chassis by means of highly integrated driving, steering, braking and suspension arrangement.

However, the existing wheel edge mechanism can not well meet the requirements of the chassis for low cost and comprehensive performance. For example, in the prior patent CN202310410246, a double-wishbone suspension is adopted, but the upper swing arm is complex in structure and high in cost, which is not beneficial to adopting the current mature suspension structure and reduces the universality. In patent CN202310421970, the steering gear transmission mechanism adopts two universal joints, which is easy to generate moment fluctuation, and has larger size and not compact structure.

Disclosure of utility model

The utility model aims to provide a novel double-wishbone suspension kingpin steering mechanism which is used for solving the problems in the background art.

The utility model is realized by the following technical scheme:

On one hand, the utility model provides a steering transmission shaft, which comprises an input shaft, an star-shaped sleeve, a plurality of steel balls, a ball cage type retainer, a clamping ring and a ball type sleeve, wherein the star-shaped sleeve is in spline connection with the bottom of the input shaft, a plurality of inner raceways which are in curved surface groove shapes are arranged on the outer surface of the star-shaped sleeve, corresponding outer raceways which are in curved surface groove shapes are arranged on the inner surface of the ball type sleeve, the ball cage type retainer is arranged between the star-shaped sleeve and the ball type sleeve so as to limit the steel balls at the inner raceways one by one, window holes for the steel balls to extend out are formed in the ball cage type retainer along the circumferential direction, and the clamping ring is assembled between the ball type sleeve and the ball cage type retainer so as to limit the ball cage type retainer axially.

Optionally, an external spline is arranged at the lower end of the input shaft, and an internal spline is arranged on the star sleeve along the axial direction of the star sleeve, and the internal spline are connected through the spline.

Optionally, an internal spline is provided on the top of the input shaft.

Optionally, the outward appearance of ball type cover is smooth sphere structure, the bottom of ball type cover is provided with the ball cage axle, the upper segment of ball cage axle is the conical surface, and the middle section is provided with the external spline, and the lower segment is provided with the external screw thread.

Optionally, the number of the inner roller path, the steel balls and the outer roller path is 6.

On the other hand, the utility model provides a double-wishbone suspension kingpin steering mechanism, which uses the steering transmission shaft and further comprises an electric steering gear, an upper swing arm and a steering knuckle, wherein the electric steering gear is fixedly arranged on the upper swing arm, the output end of the electric steering gear is provided with an external spline, and the upper swing arm is provided with a first through hole in a penetrating way so that the output end of the electric steering gear is connected with the top spline of an input shaft; the bottom of the upper swing arm is provided with a ball hole at the first through hole, the ball sleeve is connected with the ball Kong Qiujiao, the bottom of the ball hole is covered with a sealing cover, and the sealing cover is provided with a second through hole for the ball cage shaft to extend out and move circumferentially; the steering knuckle is provided with a third through hole in a penetrating mode, an inner spline is arranged in the third through hole and connected with a middle section spline of the ball cage shaft, and the lower section of the ball cage shaft extends out of the third through hole and is in threaded connection through a slotted nut to be limited in the axial direction.

Optionally, at least 3 connecting posts are fixedly arranged on the upper swing arm, and the electric steering gear is fixedly arranged on the connecting posts through bolts.

Compared with the prior art, the utility model provides a novel double-wishbone suspension kingpin steering mechanism, which has the following beneficial effects:

1. The steering transmission shaft, the electric steering gear and the steering knuckle are connected through the spline, so that the connection is simple, the assembly is easy, and the assembly error can be absorbed;

2. the steering transmission shaft is a ball cage with a ball cage shaft, so that the transmission is stable, and high torque can be transmitted;

3. in the utility model, a steering transmission shaft is adopted between the steering knuckle and the upper swing arm, so that the degree of freedom of the steering knuckle in up-and-down jumping and horizontal rotation is ensured.

Drawings

FIG. 1 is an assembly view of the whole present utility model;

FIG. 2 is a split view of the whole present utility model;

FIG. 3 is a schematic illustration of a steering drive shaft of the present utility model;

fig. 4 is an exploded view of the steering mechanism of the present utility model.

In the figure: 1. an electric power steering device; 2. an upper swing arm; 21. a connecting column; 22. a cover; 23. a ball hole; 24. a first through hole; 3. a steering drive shaft; 31. an input shaft; 32. a star cover; 33. a steel ball; 34. a ball cage; 35. a clasp; 36. a spherical sleeve; 361. a ball cage shaft; 4. a knuckle; 41. a third through hole; 5. a slotted nut.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present embodiment provides a steering transmission shaft 3, which includes an input shaft 31, a star-shaped sleeve 32, 6 steel balls 33, a ball cage 34, a snap ring 35 and a ball-shaped sleeve 36, wherein the star-shaped sleeve 32 is in spline connection with the bottom of the input shaft 31, 6 inner raceways with curved grooves are arranged on the outer surface of the star-shaped sleeve 32, the outer surface of the ball cage 36 is in a smooth spherical structure, corresponding outer raceways with curved grooves are arranged on the inner surface of the ball-shaped sleeve 36, the ball cage 34 is arranged between the star-shaped sleeve 32 and the ball cage 36 to limit the 6 steel balls 33 at the inner raceways one by one, the ball cage 34 is circumferentially provided with windows for the 6 steel balls 33 to extend out, and the snap ring 35 is assembled between the ball cage 34 and the ball cage 34 to limit the ball cage 34 axially. The bottom of the ball sleeve 36 is provided with a ball cage shaft 361, the upper section of the ball cage shaft 361 is a conical surface, the middle section is provided with an external spline, the lower section is provided with an external thread, wherein the external thread is used for connection of the bottom of the ball cage shaft 361, the external spline is used for torque transmission, and the conical surface is used for interval definition of axial freedom degree.

In a specific embodiment, the lower end of the input shaft 31 is provided with external splines, and the inner spline is provided in the radial direction of the star 32, and the two are spline-connected to transmit torque. In addition, the top of the input shaft 31 is internally splined for torque transfer to the input shaft 31.

The present embodiment further provides a steering mechanism with a double-wishbone suspension kingpin, which uses the steering transmission shaft 3 described above, and further includes an electric steering gear 1, an upper swing arm 2 and a steering knuckle 4, wherein the output end of the electric steering gear 1 is provided with an external spline and is matched with an internal spline at the top of the input shaft 31, the upper swing arm 2 is in a V-shaped structure, a first through hole 24 is formed in the upper swing arm 2 in a penetrating manner, so that the top of the input shaft 31 extends out and is in spline connection with the output end of the electric steering gear 1, a ball hole 23 is formed in the bottom of the upper swing arm 2 at the first through hole 24, the outer surface of the ball sleeve 36 is in ball hinge connection with the ball hole 23, a cover 22 is covered at the bottom of the ball hole 23, and a second through hole (not shown in the figure) for extending and circumferentially moving the ball cage shaft 361 is formed in the cover 22, so that when the ball cage shaft 361 is driven by the steering knuckle 4 to perform up-down runout or horizontal rotation, a certain degree of freedom is provided between the steering knuckle 4 and the ball cage shaft 361. The implementation mode of the axial degree of freedom can be as follows, the knuckle 4 is provided with a third through hole 41 in a penetrating way, the third through hole 41 is internally provided with an internal spline to be connected with a middle section spline of the ball cage shaft 361, and the lower section of the ball cage shaft 361 extends out of the third through hole 41 and is in threaded connection through a slotted nut 5 to be limited in the axial direction.

In addition, the electric power steering device 1 is fixedly installed on the upper swing arm 2, specifically, at least 3 connecting posts 21 are fixedly arranged on the upper swing arm 2, and the electric power steering device 1 is fixedly installed on the connecting posts 21 through bolts.

The knuckle 4 is machined from a cast aluminum material. When assembling the steering shaft 3, the input shaft 31, the star 32, the steel balls 33, the cage 34, the snap ring 35, and the ball 36 are assembled in this order. When the steering mechanism is assembled, the steering transmission shaft 3 is assembled with the upper swing arm 2, the spherical sleeve 36 is in spherical hinge fit with the upper swing arm 2, and the pulling-out force of the ball head is tested after the assembly is completed; the steering knuckle 4 is connected with the steering transmission shaft 3 through a slotted nut 5, and the electric steering gear 1 is connected with the upper swing arm 2 through bolts and nuts.

When the electric steering device works, torque is output to an input shaft 31 by the electric steering device 1, is transmitted to a ball sleeve 36 through 6 uniformly distributed steel balls 33, and is transmitted to a steering knuckle 4 through a spline shaft on the ball sleeve 36, so that the automobile is steered. When the knuckle 4 jumps up and down, the outer spherical surface of the spherical sleeve 36 rotates relative to the spherical hole 23 of the upper swing arm 2, and the kinematic pair belongs to the spherical pair, so that the free jump and rotation of the wheels are satisfied.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A steering drive shaft (3), characterized in that: the novel ball cage type ball cage comprises an input shaft (31), a star sleeve (32), a plurality of steel balls (33), a ball cage type retainer (34), a clamping ring (35) and a ball sleeve (36), wherein the star sleeve (32) is in spline connection with the bottom of the input shaft (31), a plurality of inner raceways which are in curved surface groove shapes are arranged on the outer surface of the star sleeve (32), corresponding outer raceways which are in curved surface groove shapes are arranged on the inner surface of the ball sleeve (36), the ball cage type retainer (34) is arranged between the star sleeve (32) and the ball sleeve (36) so as to limit a plurality of steel balls (33) at the inner raceways one by one, a plurality of window holes for the steel balls (33) to extend out are formed in the ball cage type retainer (34) along the circumferential direction, and the clamping ring (35) is assembled between the ball sleeve (36) and the ball cage type retainer (34) so as to limit the ball cage type retainer (34) axially.

2. A steering drive shaft (3) according to claim 1, characterized in that: the lower end of the input shaft (31) is provided with an external spline, and the star sleeve (32) is provided with an internal spline along the axial direction of the star sleeve, and the internal spline are connected through the internal spline.

3. A steering drive shaft (3) according to claim 2, characterized in that: an internal spline is arranged at the top of the input shaft (31).

4. A steering drive shaft (3) according to claim 3, characterized in that: the outer surface of the ball-shaped sleeve (36) is of a smooth spherical structure, a ball cage shaft (361) is arranged at the bottom of the ball-shaped sleeve (36), the upper section of the ball cage shaft (361) is of a conical surface, an external spline is arranged in the middle section of the ball cage shaft, and external threads are arranged in the lower section of the ball cage shaft.

5. A steering drive shaft (3) according to claim 1, characterized in that: the number of the inner rollaway nest, the steel balls (33) and the outer rollaway nest is 6.

6. The steering mechanism of the double-wishbone suspension kingpin, which uses the steering transmission shaft (3) of claim 4, is characterized by further comprising an electric steering gear (1), an upper swing arm (2) and a steering knuckle (4), wherein the electric steering gear (1) is fixedly arranged on the upper swing arm (2), an external spline is arranged at the output end of the electric steering gear (1), and a first through hole (24) is penetrated and arranged on the upper swing arm (2) so as to enable the output end of the electric steering gear (1) to be connected with the top spline of an input shaft (31); the bottom of the upper swing arm (2) is provided with a ball hole (23) at the first through hole (24), the ball sleeve (36) is connected with the ball hole (23) in a ball hinge manner, the bottom of the ball hole (23) is covered with a sealing cover (22), and the sealing cover (22) is provided with a second through hole for the ball cage shaft (361) to extend out and move circumferentially; the steering knuckle (4) is provided with a third through hole (41) in a penetrating mode, an inner spline is arranged in the third through hole (41) and is connected with a middle section spline of the ball cage shaft (361), and the lower section of the ball cage shaft (361) extends out of the third through hole (41) and is in threaded connection through a slotted nut (5) to be limited in the axial direction.

7. The double wishbone suspension kingpin steering mechanism according to claim 6 wherein: at least 3 connecting columns (21) are fixedly arranged on the upper swing arm (2), and the electric steering gear (1) is fixedly arranged on the connecting columns (21) through bolts.