CN112046602A - Rolling type lower cross arm connecting structure for steer-by-wire vehicle - Google Patents
Rolling type lower cross arm connecting structure for steer-by-wire vehicle Download PDFInfo
- Publication number
- CN112046602A CN112046602A CN202010826639.0A CN202010826639A CN112046602A CN 112046602 A CN112046602 A CN 112046602A CN 202010826639 A CN202010826639 A CN 202010826639A CN 112046602 A CN112046602 A CN 112046602A
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- China
- Prior art keywords
- cross arm
- lower cross
- motor base
- groove
- steer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0403—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by constructional features, e.g. common housing for motor and gear box
Abstract
The invention discloses a rolling type lower cross arm connecting structure for a steer-by-wire vehicle, wherein a step shaft is arranged between each first groove and a corresponding connecting hole, one end of the step shaft is positioned at the bottom of the first groove, the other end of the step shaft is fixed at the outer end part of the connecting hole through an end cover, an inner bearing is arranged at the shaft shoulder of the step shaft in the first groove, and a first sealing ring is arranged between the step shaft and the first groove; the outer bearing is arranged at the shaft shoulder of the stepped shaft in the connecting hole, the second sealing ring is arranged between the stepped shaft and the connecting hole, and the inner side of the end cover contacts the outer bearing. The two ends of the stepped shaft are respectively connected with the steering motor base and the lower cross arm through the inner bearing and the outer bearing, and the design of the double bearings reduces the resistance generated when the wheels jump, namely the steering motor base and the lower cross arm rotate around the stepped shaft, reduces the friction generated when parts rotate, and improves the service life of the parts and the flexibility of operation.
Description
Technical Field
The invention relates to the field of automobile steer-by-wire, in particular to a rolling type lower cross arm connecting structure for a steer-by-wire vehicle.
Background
The development of vehicles in the future is not separated from 'intellectualization', 'networking' and 'electromotion', and safety, energy conservation and environmental protection are the subjects and trends of automobile development. The electric automobile serving as a new energy automobile has remarkable advantages in the aspects of protecting ecological environment, relieving energy crisis and adjusting national energy structure. Compared with the traditional fuel oil automobile taking an internal combustion engine as power, the electric automobile has a series of advantages of simple structure, clean energy, realization of low emission and even zero emission, convenience for modularization integration, higher safety, easiness in combination with the Internet and the like.
Under the background of this era, the steer-by-wire technology has been developed greatly, and how to adopt the wire harness to replace the traditional mechanical structure of the vehicle has become one of the important researches. Steer-by-wire technology has the following advantages: a mechanical structure between a steering wheel and a steering wheel is eliminated, the quality of the whole vehicle is reduced, and the active safety of the vehicle is improved; the sensitivity of the vehicle is improved through the motor drive and the transmission of the electric signals, and the response time is reduced; the wire harness is adopted to replace the traditional mechanical structure, so that the flexibility of the whole vehicle design is increased, and the structural design and arrangement of the whole vehicle are facilitated; due to the introduction of the electric signals, the vehicle can be conveniently controlled and analyzed through a whole vehicle network, the maneuverability of the vehicle is improved, and the intelligent development of automatic driving and the like is facilitated.
Steer-by-wire was originally derived from aerospace technology, and more people are looking at the application of steer-by-wire in the automotive field with the development of electronic control technology. As early as the early 60 s in the 20 th century, germany began to study steer-by-wire technology. Subsequently, German Benz successfully developed a novel concept car for the steer-by-wire technology and named F400 Carving. In the early 20 th century, BMW also introduced a Z22 concept car based on the study of steer-by-wire technology. During the following 20 years, Toyota and Enfenidi introduced concept vehicles FT-EV II and Q50, respectively, to which steer-by-wire technology was applied. With the promotion of related national policies in recent years, domestic many strength companies also increase the research on steer-by-wire technology, produce a series of related achievements and promote own steer-by-wire concept car. Steer-by-wire vehicles have gradually come into the lives of people.
At present, vehicles are high in speed, drivers are not professional, and traffic flow is intensive, higher requirements are provided for safety and operation convenience of the vehicles according to the principle of people-oriented, and the in-wheel motor steer-by-wire vehicle has a wide prospect.
In the connection of the steering motor base and the lower cross arm in the prior art, a smooth through hole is formed in the steering motor base and the lower cross arm, and a pin shaft directly penetrates through the steering motor base and the lower cross arm to be fixedly connected.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a rolling type lower cross arm connection structure for a steer-by-wire vehicle, wherein two ends of a stepped shaft are respectively connected to a steering motor base and a lower cross arm through an inner bearing and an outer bearing, and the design of the double bearings reduces resistance generated when a wheel jumps, i.e., when the steering motor base and the lower cross arm rotate around the stepped shaft, reduces friction generated when a part rotates, and improves the service life of the part and the flexibility of operation.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a rolling type lower cross arm connecting structure for a steer-by-wire vehicle comprises a steering motor base, a lower cross arm, a stepped shaft, an inner bearing, a first sealing ring, an outer bearing and a second sealing ring; the steering motor base comprises a motor base and a connecting groove connected with the side edge of the motor base, the steering motor base is fixed with the lower cross arm through the connecting groove, first grooves are formed at two ends of the connecting groove inwards, the two first grooves are connected through a through hole, connecting holes are formed in the connecting part of the lower cross arm and the two ends of the connecting groove, a stepped shaft is arranged between each first groove and the corresponding connecting hole, one end of the stepped shaft is located at the bottom of the first groove, the other end of the stepped shaft is fixed at the outer end part of the connecting hole through an end cover, the inner bearing is installed at the shaft shoulder of the stepped shaft in the first groove, and the first sealing ring is installed between the stepped shaft and the first groove; the outer bearing is arranged in the connecting hole at the shaft shoulder of the stepped shaft, the second sealing ring is arranged between the stepped shaft and the connecting hole, and the inner side of the end cover contacts the outer bearing.
The steering knuckle is fixed on an upper cross arm above the lower cross arm through a spring shock absorber, and a steering motor and a reduction gearbox are sequentially fixed on the upper end of the motor base from top to bottom; the upper end of the steering knuckle is connected with the upper cross arm through a ball pin, and the lower end of the steering knuckle is fixed at the lower end of the motor base; the motor base middle part is provided with the second recess, it has the bearing to settle in the second recess, the bearing outer lane with second recess interference fit, the bearing inner circle with the knuckle is fixed, the reducing gear box includes the output shaft, the knuckle lower extreme is provided with the mounting hole, the output shaft passes the motor base, the bearing inner circle and the mounting hole, the output shaft end with the mounting hole fixed department is provided with the screw nut, comes the fixed output shaft with the axial relative position of knuckle.
Furthermore, the brake device also comprises a hub motor, and a brake caliper and a brake disc which are arranged on the hub motor.
Furthermore, the mounting hole with the corresponding position on the output shaft all is provided with the keyway, the rotation that turns to the motor can drive the rotation of knuckle through the key-type connection in the keyway to drive the rotation of wheel.
Further, a third sealing ring is arranged between the end cover and the stepped shaft.
Further, the connecting hole is a stepped hole.
Further, the connecting hole is connected with the end cover through threads.
Furthermore, the steering motor and the reduction gearbox as well as the reduction gearbox and the steering motor base are fixedly connected through screws.
The invention has the beneficial effects that:
the invention can adjust the gap between the steering motor base and the lower cross arm at the joint, ensure that the axial gap at the joint of the steering motor base and the lower cross arm is not changed, and effectively avoid the problems of wheel shake and inaccurate steering angle caused by the gap caused by manufacturing, abrasion and the like at the joint of the lower cross arm; by fixing the axial relative positions of the lower cross arm and each connecting part, the friction between each part when the vehicle moves is reduced, the steering precision is improved, the wheel shake is prevented, and the operation stability and the safety when the vehicle runs are improved; the clearance of change between the lower cross arm parts caused by frequent use can be adjusted, the service life of the parts is prolonged, the corner error transmitted to wheels by a steering wheel is reduced, and the steering precision is improved; the two ends of the stepped shaft are respectively connected with the steering motor base and the lower cross arm through the inner bearing and the outer bearing, resistance generated when the wheels jump, namely the steering motor base and the lower cross arm rotate around the stepped shaft, is reduced through the design of the double bearings, friction generated when the parts rotate is reduced, the service life of the parts is prolonged, and the flexibility of operation is improved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a three-dimensional view of a connection structure of a steering motor base and a lower cross arm;
FIG. 3 is an exploded view of the junction of the steering motor base and the lower cross arm;
FIG. 4 is a sectional view of the connection between the steering motor base and the lower cross arm;
fig. 5 is a partially enlarged view of fig. 4.
The reference numbers in the figures illustrate:
1. the steering knuckle comprises a steering knuckle body, 2, a steering motor, 3, a reduction gearbox, 4, a hub motor, 5, a brake caliper, 6, a brake disc, 7, a steering motor base, 8, an upper cross arm, 9, a spring shock absorber, 10, a lower cross arm, 11, an inner bearing, 12, a stepped shaft, 13, a first sealing ring, 14, a second sealing ring, 15, an outer bearing, 16, a third sealing ring, 17 and an end cover.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1 to 5, a rolling type lower cross arm connecting structure for a steer-by-wire vehicle comprises a steering motor base 7, a lower cross arm 10, a stepped shaft 12, an inner bearing 11, a first sealing ring 13, an outer bearing 15 and a second sealing ring 14; the steering motor base 7 comprises a motor base and a connecting groove connected with the side edge of the motor base, the steering motor base 7 is fixed with the lower cross arm 10 through the connecting groove, first grooves are formed at two ends of the connecting groove inwards, the two first grooves are connected through a through hole, connecting holes are formed in the connecting part of the lower cross arm 10 and the two ends of the connecting groove, a stepped shaft 12 is arranged between each first groove and the corresponding connecting hole, one end of each stepped shaft 12 is located at the bottom of the first groove, the other end of each stepped shaft is fixed at the outer end part of the connecting hole through an end cover 17, an inner bearing 11 is installed at the shaft shoulder of the stepped shaft 12 in the first groove, and a first sealing ring 13 is installed between the stepped; the outer bearing 15 is arranged at the shaft shoulder of the stepped shaft 12 in the connecting hole, the second sealing ring 14 is arranged between the stepped shaft 12 and the connecting hole, and the inner side of the end cover 17 contacts the outer bearing 15.
Further, the steering knuckle comprises a steering knuckle 1, an upper cross arm 8 fixed above a lower cross arm 10 through a spring shock absorber 9, a steering motor 2 and a reduction gearbox 3 which are sequentially fixed at the upper end of a motor base from top to bottom; the upper end of the steering knuckle 1 is connected with an upper cross arm 8 through a ball pin, and the lower end of the steering knuckle is fixed at the lower end of a motor base; the middle part of the motor base is provided with a second groove, a bearing is arranged in the second groove, the outer ring of the bearing is in interference fit with the second groove, the inner ring of the bearing is fixed with the steering knuckle 1, the reduction gearbox 3 comprises an output shaft, the lower end of the steering knuckle 1 is provided with a mounting hole, the output shaft penetrates through the motor base, the inner ring of the bearing and the mounting hole, and a screwing nut is arranged at the fixed position of the tail end of the output shaft and the mounting hole to fix the axial relative position of the output shaft and the steering.
Further, the brake system comprises a hub motor 4, a brake caliper 5 and a brake disc 6, wherein the brake caliper 5 and the brake disc 6 are arranged on the hub motor 4.
Furthermore, the mounting hole all is provided with the keyway with the corresponding position on the output shaft, and the rotation that turns to motor 2 can drive the rotation of knuckle 1 through the key-type connection in the keyway to drive the rotation of wheel.
Further, a third seal ring 16 is installed between the end cover 17 and the stepped shaft 12.
Furthermore, the connecting hole is a stepped hole.
Further, the connection hole is connected to the end cap 17 by a screw.
Further, the steering motor 2 and the reduction gearbox 3 and the steering motor base 7 are fixedly connected through screws.
The invention can realize fixing the axial position between the steering motor base 7 and the lower cross arm 10 by tightly pressing the outer bearing 15 and the stepped shaft 12 through rotating and screwing the end cover 17 during installation, effectively avoids the problems of overlarge error between the wheel corner and the ideal corner of a driver and low operation stability caused by wheel shake due to the change of the clearance between parts caused by the manufacturing, abrasion and the like of the joint of the lower cross arm, ensures that the axial clearance between the steering motor base 7 and the lower cross arm 10 is not changed, and the two ends of the stepped shaft 12 are respectively connected with the steering motor base 7 and the lower cross arm 10 through the inner bearing 11 and the outer bearing 15, and the design of the double bearings reduces the resistance when the wheel jumps, namely the steering motor base 7 and the lower cross arm 10 rotate around the stepped shaft 12, reduces the friction when the parts rotate, and improves the service life of the parts and the operation flexibility; the first grooves on the two sides of the steering motor base 7 are connected through holes, so that lubrication of the inner bearing 11 is facilitated, and the steering motor base 7 and the lower cross arm 10 rotate around the stepped shaft 12 in the vehicle jumping process.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A rolling lower cross arm connection structure for a steer-by-wire vehicle, characterized in that: the steering mechanism comprises a steering motor base (7), a lower cross arm (10), a stepped shaft (12), an inner bearing (11), a first sealing ring (13), an outer bearing (15) and a second sealing ring (14); the steering motor base (7) comprises a motor base and a connecting groove connected with the side edge of the motor base, the steering motor base (7) is fixed with the lower cross arm (10) through the connecting groove, the two ends of the connecting groove are both inwards provided with first grooves which are connected through a through hole, the lower cross arm (10) is provided with connecting holes at the connecting parts with the two ends of the connecting groove, the stepped shaft (12) is arranged between each first groove and the corresponding connecting hole, one end of the stepped shaft (12) is positioned at the bottom of the first groove, the other end of the stepped shaft is fixed at the outer end part of the connecting hole through an end cover (17), the inner bearing (11) is arranged at the shaft shoulder of the stepped shaft (12) in the first groove, the first sealing ring (13) is arranged between the stepped shaft (12) and the first groove; the outer bearing (15) is arranged in the connecting hole at the shaft shoulder of the stepped shaft (12), the second sealing ring (14) is arranged between the stepped shaft (12) and the connecting hole, and the inner side of the end cover (17) is in contact with the outer bearing (15).
2. The rolling lower cross arm connection structure for a steer-by-wire vehicle of claim 1, wherein: the steering knuckle is characterized by further comprising a steering knuckle (1), an upper cross arm (8) fixed above the lower cross arm (10) through a spring shock absorber (9), and a steering motor (2) and a reduction gearbox (3) which are sequentially fixed on the upper end of the motor base from top to bottom; the upper end of the steering knuckle (1) is connected with the upper cross arm (8) through a ball pin, and the lower end of the steering knuckle is fixed at the lower end of the motor base; the middle of the motor base is provided with a second groove, a bearing is arranged in the second groove, the outer ring of the bearing is in interference fit with the second groove, the inner ring of the bearing is fixed with the steering knuckle (1), the reduction gearbox (3) comprises an output shaft, the lower end of the steering knuckle (1) is provided with a mounting hole, the output shaft penetrates through the motor base, the inner ring of the bearing and the mounting hole, and a screwing nut is arranged at the fixing position of the tail end of the output shaft and the mounting hole.
3. The rolling lower cross arm connection structure for a steer-by-wire vehicle of claim 2, wherein: the brake system further comprises a hub motor (4), and a brake caliper (5) and a brake disc (6) which are arranged on the hub motor (4).
4. The rolling lower cross arm connection structure for a steer-by-wire vehicle of claim 3, wherein: and key grooves are formed in the corresponding positions of the mounting hole and the output shaft.
5. The rolling lower cross arm connection structure for a steer-by-wire vehicle of claim 4, wherein: and a third sealing ring (16) is arranged between the end cover (17) and the stepped shaft (12).
6. The rolling lower cross arm connection structure for a steer-by-wire vehicle of claim 5, wherein: the connecting hole is a stepped hole.
7. The rolling lower cross arm connection structure for a steer-by-wire vehicle of claim 6, wherein: the connecting hole is connected with the end cover (17) through threads.
8. The rolling lower cross arm connection structure for a steer-by-wire vehicle of claim 7, wherein: the steering motor (2) and the reduction gearbox (3) and the steering motor base (7) are fixedly connected through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010826639.0A CN112046602A (en) | 2020-08-17 | 2020-08-17 | Rolling type lower cross arm connecting structure for steer-by-wire vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010826639.0A CN112046602A (en) | 2020-08-17 | 2020-08-17 | Rolling type lower cross arm connecting structure for steer-by-wire vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112046602A true CN112046602A (en) | 2020-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010826639.0A Pending CN112046602A (en) | 2020-08-17 | 2020-08-17 | Rolling type lower cross arm connecting structure for steer-by-wire vehicle |
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| Country | Link |
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| CN (1) | CN112046602A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113815722A (en) * | 2021-11-11 | 2021-12-21 | 吉林大学 | Double-motor steering mechanism and redundancy control method thereof |
-
2020
- 2020-08-17 CN CN202010826639.0A patent/CN112046602A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113815722A (en) * | 2021-11-11 | 2021-12-21 | 吉林大学 | Double-motor steering mechanism and redundancy control method thereof |
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