CN113460156A

CN113460156A - Automotive suspension structure matched with wire-controlled four-wheel 90-degree steering system for use

Info

Publication number: CN113460156A
Application number: CN202110734755.4A
Authority: CN
Inventors: 王甜; 苗蕾; 李凯; 黄少文; 李仁富
Original assignee: Dongfeng Motor Group Co Ltd
Current assignee: Dongfeng Motor Group Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-10-01

Abstract

The invention discloses an automobile suspension structure matched with a wire-controlled four-wheel 90-degree steering system. It includes a steering motor, the steering motor is drivingly connected with the upper end of the kingpin spool through a planetary gear, the lower end of the kingpin spool is rigidly connected with the steering knuckle, and the upper and lower ends of the kingpin spool are respectively connected with the shock absorber One end of the upper swing arm and the lower swing arm of the shock absorber is hinged, and the other ends of the upper swing arm of the shock absorber and the lower swing arm of the shock absorber are hinged with each other; A shock absorber is hinged between the hinged ends of the pin strut. In the present invention, the position of the king pin spool is fixed, the steering motor module is fixed on the upper end of the king pin spool, the state is stable during the movement process, the motor has high working stability, and the torque transmission efficiency is high.

Description

Automotive suspension structure matched with wire-controlled four-wheel 90-degree steering system for use

Technical Field

The invention belongs to the technical field of automobile suspensions, and particularly relates to an automobile suspension structure matched with a wire-controlled four-wheel 90-degree steering system.

Background

The automobile industry develops rapidly, and more advanced technologies are produced. Such as four-wheel by wire 90 degree steering. The existing wire-controlled four-wheel 90-degree steering system is mainly realized by equipping each wheel with a steering motor. However, how the suspension is matched with the steering system can ensure the running stability of the vehicle and effectively transmit the steering torque to the wheels. The suspension systems currently matched by the four-wheel 90-degree steering system mainly comprise a candle type suspension and a Macpherson type suspension. However, both suspension systems have obvious defects and have poor matching effect.

And (3) main pin: the wheel rotates about an axis, which is the kingpin. The kingpin of a typical car is virtual, and is a central straight line from one end of the shock absorber (i.e., the central position of the shock absorber fixed to the car body) to the lower end position of the knuckle.

The structural feature of the prior art candle suspension system is that the wheel moves up and down along a kingpin axis rigidly fixed to the frame. As shown in FIG. 1, the kingpin 5-1 of the candle suspension is rigidly secured to the vehicle body or frame and the knuckle is connected to the vent tube 1-1. When the wheel is jumping, the knuckle moves along the kingpin axis together with the snorkel 1-1. In the case of this type of suspension, when the suspension deforms, the angle of alignment of the kingpin does not change, and only the track and wheelbase change slightly. The four-wheel 90-degree steering motor module is matched with the steering motor module, the working environment of the motor is stable, and the steering torque transmission efficiency is high.

However, as shown in fig. 1, under the influence of the candle suspension structure, the lateral force generated by the wheel is all borne by the long sleeve 3-1 and the main pin 5-1 which are sleeved on the main pin 5-1, and the friction resistance between the sleeve and the main pin is large, and the abrasion is serious. The durability and stability of the product are poor, and the traditional vehicle is not used basically. The four-wheel 90-degree steering system is matched with the steering system for use, more than no better suspension mechanism can be used, extremely high product damage risk is faced, and the durability and the service life are very poor.

The existing Macpherson type suspension belongs to independent suspension, has better comprehensive performance and is most widely used in the traditional vehicle. The main structure is composed of a spiral spring and a shock absorber, the shock absorber can avoid the phenomenon that the spiral spring deflects forwards, backwards, leftwards and rightwards when stressed, the spring is limited to vibrate in the vertical direction only, and the hardness and the performance of the suspension can be set by the stroke length and the tightness of the shock absorber.

Taking the macpherson suspension diagram of fig. 2 as an example: the outer end of which is connected to the knuckle 801 by a ball hinge 1501. The upper end of the shock absorber is connected with the vehicle body through a shock insulation block assembly 201 (which can be regarded as an upper hinge point of the shock absorber) with a bearing, and the lower end of the shock absorber is connected with the steering knuckle. The lateral force borne by the wheels is mostly borne by the transverse swing arm through the steering knuckle, and the rest is borne by the shock absorber piston and the piston rod. Therefore, the structure reduces sliding friction and abrasion to a certain extent compared with the candle type suspension.

The Macpherson suspension is of a straight tube type structure, has low transverse rigidity, is easy to automatically steer when a vehicle runs on an uneven road surface, and is easy to bend when being impacted violently, so that the steering performance is influenced. The anti-roll and braking nodding capabilities are weak, and the resistance to the impact in the left and right directions is poor. The steering system of the traditional vehicle with non-90-degree steering can be relieved by adding a stabilizer bar. However, if the four-wheel 90 steering system is used in combination with a macpherson suspension, there is no space for adding a stabilizer bar, and these disadvantages cannot be avoided. And compared with a candle type suspension, the stability of the main pin is poor, and the main pin is easy to shake. The four-wheel 90-degree steering motor module is matched with the steering motor module to easily generate jolt and vibration, and the performance of the motor module and the stability of steering torque transmission are influenced.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides an automobile suspension structure matched with a four-wheel-by-wire 90-degree steering system. The steering motor module can provide stable working environment and higher torque transmission efficiency for the steering motor module like a candle type suspension; meanwhile, when the suspension is impacted by lateral force of the wheel, the suspension has good transverse and longitudinal shock absorption capacity like a Macpherson suspension, and the service life of a product is prolonged.

The technical scheme adopted by the invention is as follows: an automobile suspension structure matched with a wire-controlled four-wheel 90-degree steering system comprises a steering motor, wherein the steering motor is in transmission connection with the upper end of a main pin sliding column through a planetary gear, the lower end of the main pin sliding column is rigidly connected with a steering knuckle, the upper end and the lower end of the main pin sliding column are respectively hinged with one end of an upper shock absorber swing arm and one end of a lower shock absorber swing arm, and the other ends of the upper shock absorber swing arm and the lower shock absorber swing arm are hinged with each other; and the shock absorbers are hinged between the upper shock absorber swing arm and the lower shock absorber swing arm and one end of the main pin sliding column, which is hinged with the main pin sliding column.

In a further preferred structure, a damping spring is sleeved outside the main pin sliding column, the upper end of the damping spring is in limit connection with the main pin sliding column, and the lower end of the damping spring is in contact connection with the steering knuckle.

In a further preferred structure, the steering motor is fixed on a motor fixing plate on the frame.

In a further preferred structure, a self-aligning bearing is arranged between the main pin sliding column and the motor fixing plate.

In a further preferred structure, an oilless bearing is arranged in the kingpin spool, and the oilless bearing is located between the steering knuckle and the kingpin spool.

The further preferred structure still includes the swing arm down, swing arm one end is connected with knuckle ball hinge down, and the other end is connected with the frame damping.

In a further preferred configuration, the knuckle is connected to a wheel.

In a further preferred configuration, the wheel is driven by an in-wheel motor.

In a further preferable structure, an upper connecting ring is sleeved at the upper end of the main pin sliding column, and the main pin sliding column is hinged with one end of an upper swing arm of the shock absorber through the upper connecting ring.

In a further preferable structure, a lower connecting ring is sleeved at the lower end of the main pin sliding column, and the main pin sliding column is hinged with one end of the lower swing arm of the shock absorber through the lower connecting ring.

The invention has the beneficial effects that:

1. the main pin sliding column is fixed in position, the steering motor module is fixed at the upper end of the main pin sliding column, the state is stable in the movement process, the working stability of the motor is high, and the torque transmission efficiency is high.

2. The self-aligning bearing is additionally arranged at the position of the fixed point on the main pin sliding column, so that a slight inclination angle can be corrected, the steering motion is prevented from being blocked, and the working stability of the steering system is improved.

3. By adding the lower swing arm, the lateral force borne by the wheel is mostly borne by the lower swing arm through the steering knuckle, and the rest small part is borne by the shock absorber, so that the stability of the whole suspension is improved, and the service life of the suspension is prolonged.

Drawings

FIG. 1 is a schematic view of a candle suspension configuration;

FIG. 2 is a schematic diagram of a McPherson suspension structure;

FIG. 3 is a schematic structural view of the present invention;

FIG. 4 is a partial cross-sectional view of the present invention;

fig. 5 is an isometric view of the present invention.

In the figure: 1-1-vent pipe, 2-1-shock absorber, 3-1-sleeve, 4-1-first dust cover, 5-1-king pin and 6-1-second dust cover;

101-connecting plate assembly, 201-shock insulation block assembly with bearing, 301-spiral spring upper tray, 401-front buffer cushion block, 501-dust cover, 601-spiral spring, 701-cylinder shock absorber, 801-knuckle, 901-steering pull rod inner hinge, 1001-transverse swing arm inner hinge, 1101-transverse stabilizer bar, 1201-transverse swing arm, 1301-rubber buffer block, 1401-transmission shaft and 1501-transverse swing arm ball hinge;

the device comprises a motor fixing plate 1, a steering motor 2, a planet gear 3, a self-aligning bearing 4, a main pin sliding column 5, an oilless bearing 6, a shock absorber 7, a shock absorber 8, a shock absorber upper swing arm 9, a shock absorber lower swing arm 10, a shock absorbing spring 11, a steering knuckle 12, a vehicle frame 13, a lower swing arm 13, a hub motor 14, a wheel 15, an upper connecting ring 16 and a lower connecting ring 17.

Detailed Description

The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.

As shown in fig. 3-5, the steering mechanism comprises a steering motor 2, wherein the steering motor 2 is in transmission connection with the upper end of a main pin sliding column 5 through a planetary gear 3, the lower end of the main pin sliding column 5 is in rigid connection with a steering knuckle 11, the upper end and the lower end of the main pin sliding column 5 are respectively hinged with one end of an upper shock absorber swing arm 8 and one end of a lower shock absorber swing arm 9, and the other ends of the upper shock absorber swing arm 8 and the lower shock absorber swing arm 9 are hinged with each other; and a shock absorber 7 is hinged between the upper shock absorber swing arm 8 and the lower shock absorber swing arm 9 and one end of the main pin sliding column 5 in a hinged mode.

And a damping spring 10 is sleeved outside the main pin sliding column 5, the upper end of the damping spring 10 is in limit connection with the main pin sliding column 5, and the lower end of the damping spring is in contact connection with the steering knuckle 11.

The steering motor 2 is fixed on a motor fixing plate 1 on the frame.

And a self-aligning bearing 4 is arranged between the main pin sliding column 5 and the motor fixing plate 1.

An oilless bearing 6 is arranged in the main pin sliding column 5, and the oilless bearing 6 is located between the steering knuckle 11 and the main pin sliding column 5.

The automobile steering device further comprises a lower swing arm 13, wherein one end of the lower swing arm 13 is connected with the steering knuckle 11 through a ball hinge, and the other end of the lower swing arm is connected with the frame 12 in a damping mode.

The knuckle 11 is connected to a wheel 15.

The wheel 15 is driven by the in-wheel motor 14.

The upper end of the main pin sliding column 5 is sleeved with an upper connecting ring 16, and the main pin sliding column 5 is hinged with one end of the upper swing arm 8 of the shock absorber through the upper connecting ring 16.

The lower end of the main pin sliding column 5 is sleeved with a lower connecting ring 17, and the main pin sliding column 5 is hinged with one end of the lower swing arm 9 of the shock absorber through the lower connecting ring 17.

The working process of the invention is as follows: in the suspension steering structure, a steering motor 2 is fixed on a motor fixing plate 1 on a frame, the speed and the torque are reduced and increased through a planetary gear 3, a main pin sliding column 5 is driven by the torque to steer, an upper swing arm 8 of a shock absorber and a lower swing arm 9 of the shock absorber are driven, and finally a steering knuckle 11 is driven to rotate, so that the steering of the whole mechanism is realized.

In the suspension jumping structure, the main pin sliding column 5 and the steering knuckle 11 realize longitudinal jumping through a damping spring 10; the main pin sliding column 5 is in contact with the steering knuckle 11 through the oilless bearing 6, so that the bearing capacity of the sliding column under radial impact is improved, and friction is reduced; the upper and lower limit is realized through the shock absorber 7. Thereby realizing the jumping of the whole mechanism.

In the suspension structure, the self-aligning bearing 4 can realize slight radial movement, and the steering system is prevented from being locked when the suspension is impacted laterally.

In the suspension structure, one end of the lower swing arm 13 is connected with the steering knuckle 11 through a ball hinge, and the other end of the lower swing arm is connected with the frame 12 in a damping mode, when the wheel 15 is impacted laterally, impact force is transmitted to the lower swing arm 13 through the steering knuckle 11, the lateral force is mainly absorbed by the lower swing arm 13, and the rest small part of the lateral force is borne by the shock absorber 7, so that the service life of the whole suspension system is prolonged in a limited mode.

Those not described in detail in this specification are within the skill of the art.

Claims

1. An automobile suspension structure matched with a wire-controlled four-wheel 90-degree steering system, comprising a steering motor (2), characterized in that: the steering motor (2) is connected to a kingpin spool through a planetary gear (3) (5) Drive connection at the upper end, the lower end of the kingpin spool (5) is rigidly connected with the steering knuckle (11), the upper and lower ends of the kingpin spool (5) are respectively connected with the upper swing arm (8) of the shock absorber ), one end of the shock absorber lower swing arm (9) is hinged, and the shock absorber upper swing arm (8) and the other end of the shock absorber lower swing arm (9) are hinged to each other; the shock absorber upper swing arm ( 8) The shock absorber (7) is hinged between the hinged end of the lower swing arm (9) of the shock absorber and the kingpin sliding column (5).

2. A kind of automobile suspension structure matched with a wire-controlled four-wheel 90-degree steering system according to claim 1, characterized in that: a shock-absorbing spring (10) is provided on the outer casing of the kingpin spool (5), The upper end of the shock absorbing spring (10) is connected with the kingpin spool (5) in a limited position, and the lower end is connected in contact with the steering knuckle (11).

3. The automobile suspension structure matched with the wire-controlled four-wheel 90-degree steering system according to claim 1, wherein the steering motor (2) is fixed on the motor fixing plate (1) on the vehicle frame. )superior.

4. The automobile suspension structure matched with the wire-controlled four-wheel 90-degree steering system according to claim 3, characterized in that: between the king pin spool (5) and the motor fixing plate (1) A self-aligning bearing (4) is provided.

5. An automobile suspension structure matched with a wire-controlled four-wheel 90-degree steering system according to claim 1, characterized in that: an oil-free bearing (6) is provided in the kingpin spool (5) , the oil-free bearing (6) is located between the steering knuckle (11) and the kingpin spool (5).

6. A vehicle suspension structure matched with a wire-controlled four-wheel 90-degree steering system according to claim 1, characterized in that it further comprises a swing arm (13), one end of the swing arm (13) is connected to the steering wheel The section (11) is connected with a ball hinge, and the other end is connected with the frame (12) by damping.

7 . The automobile suspension structure matched with the 90-degree-by-wire four-wheel steering system according to claim 1 , wherein the steering knuckle ( 11 ) is connected to the wheel ( 15 ). 8 .

8 . The automobile suspension structure matched with the 90-degree-by-wire four-wheel steering system according to claim 7 , wherein the wheels ( 15 ) are driven by in-wheel motors ( 14 ). 9 .

9. The automobile suspension structure matched with the wire-controlled four-wheel 90-degree steering system according to claim 1, characterized in that: the upper end of the kingpin spool (5) is sleeved with an upper connecting ring (16). ), the kingpin sliding column (5) is hinged with one end of the upper swing arm (8) of the shock absorber through the upper connecting ring (16).

10. An automobile suspension structure matched with a wire-controlled four-wheel 90-degree steering system according to claim 1, characterized in that: a lower connecting ring (17) is sleeved at the lower end of the king pin spool (5). ), the kingpin sliding column (5) is hinged with one end of the shock absorber lower swing arm (9) through the lower connecting ring (17).