CN215663634U

CN215663634U - Formula car steering system

Info

Publication number: CN215663634U
Application number: CN202122094454.8U
Authority: CN
Inventors: 汪洪波; 刘欣雨; 覃一哲; 杨洋; 冯立钊
Original assignee: Hefei University of Technology
Current assignee: Hefei University of Technology
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2022-01-28
Anticipated expiration: 2031-09-01

Abstract

The utility model relates to a formula car steering system which comprises a steering wheel, a steering power-assisted motor, a duplex universal joint, a steering column and a steering gear. The power steering motor is fixedly arranged at the top of a cab of the racing car; an input shaft of the power steering motor is connected with a steering wheel. One end of the duplex universal joint is connected with the output end of the power steering motor through a spline. One end of the steering column is connected with a spline at one end of the duplex universal joint. The steering gear is connected at the steering column and is far away from the one end of the duplex universal joint, and the steering gear both ends are used for connecting the wheel of cycle racing. The duplex universal joint is a quasi-constant velocity universal joint, the included angle between the allowed shafts is larger, the intermediate transmission shaft can be shortened, the included angle between the quick-release shaft and the steering column can be increased as much as possible, the upper space of the cockpit is fully utilized, and the space utilization rate is improved. Meanwhile, compared with a connection mode depending on a flat key, the spline-meshed connection mode can better reduce the free stroke of the steering wheel during steering.

Description

Formula car steering system

Technical Field

The utility model relates to the technical field of steering of formula cars, in particular to a steering system of a formula car.

Background

The cockpit of the formula racing car without the person is often limited in space, and the formula racing of college students in china has clear requirements on the size of the cross section inside the cockpit, so that the application of an electric power steering system (EPS for short) in the field of formula racing cars is not easy.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an equation racing car steering system for solving the problem that the application of the electric power steering system in the equation racing car field is not easy.

An equation car steering system comprises a steering wheel, a steering power-assisted motor, a duplex universal joint, a steering column and a steering gear. The power steering motor is fixedly arranged at the top of a cab of the racing car; an input shaft of the power steering motor is connected with a steering wheel. One end of the duplex universal joint is connected with the output end of the power steering motor through a spline. One end of the steering column is connected with a spline at one end of the duplex universal joint, which is far away from the power steering motor. The steering gear is connected at the end of the steering column far away from the duplex universal joint, the two ends of the steering gear are used for connecting the wheels of the racing car, and the steering gear is used for changing the direction of the wheels. Wherein, when the steering wheel rotates, the torque is transmitted to an input shaft of the power steering motor; an output shaft of the power steering motor transmits torque to the steering gear through the duplex universal joint and the steering upright post, and the steering gear drives wheels to achieve steering.

Above-mentioned equation motorcycle race a steering system, the dual universal joint is accurate constant velocity universal joint, and its contained angle between the axle that allows is bigger, can shorten the intermediate drive axle to the shortest, is zero even, can increase the contained angle of quick detach axle and steering column as far as possible, make full use of cockpit upper portion space, improve space utilization. Meanwhile, compared with a connection mode depending on a flat key, the spline-meshed connection mode can better reduce the free stroke of the steering wheel during steering.

In one embodiment, a quick release structure is arranged between the steering wheel and the power steering motor; the quick-release structure comprises a quick-release shaft and a quick-release part, and the quick-release part comprises a shaft hole which is detachably connected with the quick-release shaft; the quick-release shaft is connected with the input shaft of the power steering motor.

In one embodiment, the quick release member is mounted on the steering wheel by a bolt; a quick-release internal spline is arranged in the shaft hole of the quick-release part; an input shaft of the power steering motor is provided with an external spline, one end of the quick-release shaft is welded with a quick-release external spline matched with the quick-release internal spline, and the other end of the quick-release shaft is provided with an internal spline matched with the external spline.

In one embodiment, a bearing is sleeved outside the middle section of the shaft body of the quick-release shaft, the bearing is mounted on a bearing support, and the bearing support is fixedly mounted on a frame of the racing car.

In one embodiment, the bearing is an interference fit with the bearing mount.

In one embodiment, the steering gear comprises a straight spur gear, a rack guide post, a linear bearing and a linear sleeve, wherein one end of the straight spur gear is fixedly connected with one end of the steering column, which is far away from the duplex universal joint; the rack guide post is meshed with the straight-tooth cylindrical gear, and two ends of the rack guide post are respectively connected with a tie rod joint; the tie rod joint is connected with a tie rod, and the tie rod is used for connecting wheels; two linear bearings are sleeved at two ends of the rack guide post; the linear sleeve is sleeved outside the linear bearing, and the lug is installed on the linear sleeve.

In one embodiment, the steering gear further comprises a shell and an end cover, wherein the shell and the end cover are detachably connected and form a cavity; the rack guide post penetrates through the shell; the straight spur gear penetrates through the end cover; the rack guide post and the straight-tooth cylindrical gear are meshed in the cavity.

In one embodiment, an adjusting bolt is connected to the side wall of the housing, one end of the adjusting bolt located in the housing is opposite to one side, away from the spur gear, of the rack guide post, and a spring is arranged between the adjusting bolt and the rack guide post.

In one embodiment, an end of the steering column, which is far away from the duplex universal joint, is provided with an inward concave circular groove, one end of the spur gear is located in the circular groove, the side wall of the circular groove and the side wall of the spur gear located in the circular groove are provided with a first threaded hole which is matched with each other, and the spur gear is connected with the steering column through a bolt.

In one embodiment, both ends of the rack guide post are provided with a second threaded hole which is sunken inwards, the connecting part of the tie rod joint is provided with a third threaded hole which is matched with the second threaded hole, and the rack guide post is connected with the tie rod joint through a bolt.

Compared with the prior art, the utility model has the following beneficial effects:

compare ordinary single universal joint that uses in pairs, the dual joint is accurate constant velocity universal joint, and its contained angle between the axle that allows is bigger, can shorten intermediate drive axle to the shortest, is zero even, can increase the contained angle of quick detach axle and steering column as far as possible, make full use of drives front deck upper portion space, improves space utilization. Meanwhile, compared with a connection mode depending on a flat key, the spline-meshed connection mode can better reduce the free stroke of the steering wheel during steering.

Drawings

FIG. 1 is a schematic diagram of the steering system of the formula car;

fig. 2 is an exploded view of the structure of a steering gear in the steering system of the formula car.

In the figure: the steering wheel-free steering mechanism comprises a steering wheel 1, a quick-release part 2, a bearing 3, a quick-release shaft 4, a power-assisted steering motor 5, a duplex universal joint 6, a steering column 7, a steering gear 8, a straight-tooth cylindrical gear 81, an end cover 82, a plastic bearing 84, a rack guide post 85, a lug 87, a linear bearing 88, a linear sleeve 89, a tie rod joint 811, an adjusting bolt 812, a housing 813 and a tie rod 9.

The present invention is described in further detail with reference to the drawings and the detailed description.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Examples

Referring to fig. 1 and 2, a formula car steering system includes a steering wheel 1, a power steering motor 5, a double universal joint 6, a steering column 7 and a steering gear 8. The power steering motor 5 is fixedly arranged at the top of a cab of the racing car; an input shaft of the power steering motor 5 is connected to the steering wheel 1. One end of the duplex universal joint 6 is connected with the output end of the power steering motor 5 through a spline. One end of the steering column 7 is in spline connection with one end of the duplex universal joint 6 far away from the power steering motor 5. In this embodiment, the included angle between the two end shafts of the universal joint is 35 degrees. The steering gear 8 is connected to one end of the steering column 7 far away from the double-jointed universal joint 6, two ends of the steering gear 8 are used for connecting wheels of racing cars, and the steering gear 8 is used for changing the direction of the wheels. Wherein, when the steering wheel 1 rotates, the torque is transmitted to the input shaft of the power steering motor 5; an output shaft of the power steering motor 5 transmits torque to a steering gear 8 through a duplex universal joint 6 and a steering upright post 7, and the steering gear 8 drives wheels to realize steering. The middle transmission shaft of the steering system is shortened to the shortest by using the duplex universal joint 6, the power-assisted steering motor 5 is arranged above a cab, the space of the cab is utilized to the maximum extent, when the steering wheel 1 is rotated, the generated torque is firstly transmitted to an input shaft of the power-assisted steering motor 5 through the quick-release shaft 4, is transmitted to the duplex universal joint 6 through an output shaft, and is finally transmitted to the steering gear 8 through the steering upright post 7, and the steering gear 8 controls wheels to steer under the action of the torque.

In the present embodiment, a quick release structure is provided between the steering wheel 1 and the power steering motor 5. The specific type of the quick release structure is not limited, in this embodiment, the quick release structure includes a quick release shaft 4 and a quick release member 2, and the quick release member includes a shaft hole for detachably connecting with the quick release shaft; . The quick-release component 2 is arranged in the steering wheel 1, one end of a quick-release shaft 4 is connected in the quick-release component 2, and the other end of the quick-release shaft is connected with an input shaft of a power steering motor 5. Of course, in the present embodiment, the quick release member 2 is mounted on the steering wheel 1 by bolts; a quick-release internal spline is arranged in the shaft hole of the quick-release part 2; an input shaft of the power steering motor 5 is provided with an external spline, one end of the quick-release shaft 4 is welded with a quick-release external spline matched with the quick-release internal spline, and the other end of the quick-release shaft is provided with an internal spline matched with the external spline. When the quick-release steering wheel is assembled, firstly, the vertex of a triangle with the proper size is taken from the bottom plate of the steering wheel 1 for punching, three hole positions corresponding to the vertex of the triangle are formed in the quick-release part 2, and the steering wheel 1 is connected with the quick-release part 2 through mounting bolts. Meanwhile, an internal spline installed in the shaft hole of the quick-release member 2 is in meshed connection with an external spline of the quick-release shaft 4, and an internal spline at the other end of the quick-release shaft 4 is in meshed connection with an external spline of an input shaft of the power steering motor 5.

In the present embodiment, the power steering motor 5 is a purchased component, and includes a torque sensor, a rotation angle sensor, a worm gear and worm gear pair, and the like. The duplex universal joint 6 is a quasi-constant velocity universal joint, has simple structure, convenient manufacture and reliable work, and can allow a larger included angle between two shafts. A U-shaped frame which is attached to the appearance of the power steering motor 5 is welded at the corresponding position of the power steering motor 5 of the vehicle frame of the equation type vehicle and used for supporting the weight of the power steering motor 5, and the stability of the whole steering system is ensured. The rated power of the motor is 220W, the rated torque is 2 +/-10% N.m, the reduction ratio of a worm gear transmission pair in the motor is 16.5: 1, the motor can output the maximum torque of 33 N.m and is transmitted through a steering system with a torque transmission ratio of 3.825, and the motor is selected to meet the steering requirement.

In this embodiment, the quick-release shaft 4 is sleeved with the bearing 3, the diameter of the front part of the quick-release shaft 4 is slightly smaller than that of the rear half part, the bearing 3 can be sleeved into a proper position of the middle section of the quick-release shaft 4 from the section with the smaller diameter, and small grooves for installing the clamp spring to fix the position of the bearing 3 are formed in the front and the rear of the position. The bearing 3 is mounted on a bearing 3 support. 3 supports of bearing and 3 outer races of bearing adopt interference fit, and 3 supports of bearing have improved the stability of quick detach axle through the welding on the frame.

In this embodiment, the steering gear 8 includes a spur gear 81, a rack guide post 85, a linear bearing 883, and a linear sleeve 89, and one end of the spur gear 81 is fixedly connected to one end of the steering column 7 away from the tandem universal joint 6; the rack guide post 85 is meshed with the straight-tooth cylindrical gear 81, and two ends of the rack guide post 85 are respectively connected with a tie rod joint 811; the tie rod joint 811 is used for connecting the tie rod 9, and the tie rod 9 is used for connecting the wheel; two linear bearings 883 are sleeved at two ends of the rack guide post 85; the linear sleeve 89 is sleeved outside the linear bearing 883, and the lug 87 is installed on the linear sleeve 89. When the steering column 7 rotates, the straight-toothed spur gear 81 is driven to rotate, the rack guide post 85 is further driven to do reciprocating linear motion, the rotary motion of the gear is converted into the reciprocating linear motion of the rack guide post 85, and the cross pull rod transmits force to the knuckle arm to push the left wheel and the right wheel to rotate in a coordinated mode.

In other embodiments, the steering gear 8 may further include a housing 813 and an end cap 82, the end cap 82 and the housing 813 are provided with holes at corresponding positions, the holes of the housing 813 are provided with screw threads, the holes of the end cap 82 and the housing 813 are in one-to-one correspondence, the screws are screwed into the holes to be fixed, the housing 813 and the end cap 82 are detachably connected, and when the housing 813 and the end cap 82 are closed, a cavity is formed. The rack guide post 85 penetrates through the housing 813; the straight spur gear 81 penetrates through the end cover 82, and the lower end of the straight spur gear is rotatably installed in the housing 813 through a plastic bearing 84; the meshing part between the rack guide post 85 and the straight spur gear 81 is positioned in the cavity.

In other embodiments, an adjusting bolt 812 is connected to a side wall of the housing 813, one end of the adjusting bolt 812 located in the housing 813 is opposite to one side of the rack guide post 85 away from the spur gear 81, and a spring is disposed between the adjusting bolt 812 and the rack guide post 85. During use. The adjusting bolt 812 is rotated to enable the spring to be in a compressed state, and the compressed spring applies certain pressure to the rack guide post 85, so that the gear and the rack are tightly meshed, and the free stroke of the steering wheel 1 is reduced.

In this embodiment, an inwardly recessed circular groove is formed in one end, away from the tandem universal joint 6, of the steering column 7, one end of the spur gear 81 is located in the circular groove, threaded holes I matched with each other are formed in the side wall of the circular groove and the side wall of the spur gear 81 located in the circular groove, and the spur gear 81 and the steering column 7 are connected through a bolt.

In this embodiment, both ends of the rack guide post 85 are provided with a second inwardly recessed threaded hole, the connecting portion of the tie rod joint 811 is provided with a third threaded hole matched with the second threaded hole, and the rack guide post 85 is bolted to the tie rod joint 811.

The steering system of this embodiment is at the during operation, and the driver uses hand power steering wheel 1, and steering wheel 1 drives quick detach axle 4 through quick detach 2 and rotates and transmit the moment of torsion to the input shaft of power-assisted steering motor 5, and the motor output shaft transmits the moment of torsion to steering gear 8 through double universal joint 6 and steering column 7, and rack and pinion steering gear 8 becomes the horizontal motion of left and right tie rod with the rotary motion, and the tie rod promotes left and right wheels and realizes turning to.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express one embodiment of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the application of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A formula car steering system, comprising:

a steering wheel;

the power steering motor is fixedly arranged at the top of a cab of the racing car; the input shaft of the power steering motor is connected with the steering wheel;

one end of the duplex universal joint is in spline connection with the output end of the power steering motor;

one end of the steering column is in spline connection with one end of the duplex universal joint, which is far away from the power steering motor; and

the steering device is connected to one end, far away from the double-jointed universal joint, of the steering column, two ends of the steering device are used for connecting wheels of racing cars, and the steering device is used for changing the direction of the wheels;

wherein the steering wheel transmits torque to an input shaft of the power steering motor when rotating; and an output shaft of the power steering motor transmits the torque to the steering gear through the duplex universal joint and the steering upright post, and then the steering gear drives the wheels to realize steering.

2. The equation car steering system according to claim 1, wherein a quick release structure is provided between the steering wheel and the power steering motor; the quick-release structure comprises a quick-release shaft and a quick-release part, and the quick-release part comprises a shaft hole which is detachably connected with the quick-release shaft; the quick-release part is installed in the steering wheel, one end of the quick-release shaft is connected in the quick-release part, and the other end of the quick-release shaft is connected with an input shaft of the power steering motor.

3. The equation car steering system of claim 2, wherein the quick release member is mounted on the steering wheel by bolts; a quick-release internal spline is arranged in the shaft hole of the quick-release part; the input shaft of the power steering motor is provided with an external spline, one end of the quick-release shaft is welded with the quick-release external spline matched with the quick-release internal spline, and the other end of the quick-release shaft is provided with the internal spline matched with the external spline.

4. The formula car steering system of claim 3, wherein a bearing is sleeved on the middle section of the axle body of the quick-release shaft, and the bearing is mounted on a bearing support which is fixedly mounted on the frame of the car.

5. The equation car steering system of claim 4, wherein the bearing is an interference fit with the bearing mount.

6. The equation car steering system according to claim 1, wherein the steering gear comprises a spur gear, a rack guide post, a linear bearing and a linear sleeve, and one end of the spur gear is fixedly connected with one end of the steering column far away from the duplex universal joint; the rack guide pillar is meshed with the straight-tooth cylindrical gear, and two ends of the rack guide pillar are respectively connected with a tie rod joint; the tie rod joint is connected with a tie rod, and the tie rod is used for connecting wheels; the two linear bearings are sleeved at two ends of the rack guide post; the linear sleeve is sleeved outside the linear bearing, and the linear sleeve is provided with a lug.

7. The equation car steering system according to claim 6, wherein said steering gear further comprises a housing and an end cap, said housing and said end cap being removably connected to form a cavity; the rack guide post penetrates through the shell; the straight-tooth cylindrical gear penetrates through the end cover, and the rack guide post and the straight-tooth cylindrical gear are meshed in the cavity.

8. The equation car steering system according to claim 7, wherein an adjusting bolt is connected to the side wall of the housing, one end of the adjusting bolt located in the housing is opposite to one side of the rack guide pillar away from the spur gear, and a spring is arranged between the adjusting bolt and the rack guide pillar.

9. The formula car steering system according to claim 6, wherein one end of the steering column, which is far away from the duplex universal joint, is provided with an inward concave circular groove, one end of the spur gear is located in the circular groove, the side wall of the circular groove and the side wall of the spur gear located in the circular groove are provided with a first threaded hole which is matched with each other, and the spur gear is connected with the steering column through a bolt.

10. The formula car steering system according to claim 6, wherein both ends of the rack guide post are provided with a second threaded hole which is recessed inwards, the connecting portion of the tie rod joint is provided with a third threaded hole which is matched with the second threaded hole, and the rack guide post is bolted to the tie rod joint.