CN212499770U - Automobile and torsion beam thereof - Google Patents

Abstract

The utility model relates to the field of automotive technology, especially, relate to an automobile and torsion beam thereof, including turning round roof beam body and erection support, turn round the both ends of roof beam body and install the erection support, turn round the junction of roof beam body and erection support and be provided with first bolster and second bolster, first bolster sets up in the top of turning round the roof beam body, and the second bolster sets up in the rear below of turning round the roof beam body, and the line top-down at the center of first bolster and the center of second bolster inclines to the outside and towards the rear. The utility model discloses set up first bolster and second bolster increase degree of freedom in the junction of turning round roof beam body and erection support, make the degree of freedom of whole car timing obtain promoting, because the setting of first bolster and second bolster, higher value can be set for to the bush rigidity of trailing arm bush, and whole car strikes the ride comfort and also can not receive the influence, and helps promoting torsion beam's lateral rigidity, promotes the holistic performance of car.

Description

Automobile and torsion beam thereof

Technical Field

The utility model relates to the field of automotive technology, especially, relate to an automobile and torsion beam thereof.

Background

Today, in the Chinese automobile market, torsion beams have been considered to be a low-end and low-performance dependent suspension. The working principle is that the non-independently suspended wheels are arranged at two ends of a torsion beam, when one side of the wheels jumps up and down, the torsion beam jumps around two virtual axes, so that the other side of the wheels is driven to jump correspondingly, and the inclination or the swing of the whole vehicle body is reduced. Because the stabilizer has certain torsional rigidity, the stabilizer can play the same role as the transverse stabilizer bar, can increase the roll rigidity of the vehicle and improve the roll stability of the vehicle.

The automobile adopting the suspension system is moderate in smoothness and comfort, but the suspension system is mainly used for heavy trucks, common passenger cars, small cars and other special vehicles due to the simple structure and large bearing capacity. For the passenger car, the torsion beam type rear suspension has the advantages of simple structure, low manufacturing cost, easy maintenance, small occupied car bottom space and capability of reducing the height of a car chassis, so that the space in the car can be increased, and the torsion beam type rear suspension is commonly used for small passenger cars.

The torsion beam is used, so that the cost and the weight of the whole vehicle can be reduced, and the advantage is very obvious. The disadvantage comes from the drawback of the torsion beam's own structure-low degree of freedom. This drawback causes the ride comfort and handling stability of a vehicle equipped with a torsion beam to be significantly less than that of a multi-link.

The torsion beam on the market at present is single in structure, and comprises a torsion beam body crossing the lateral direction of a vehicle body and two trailing arms, and is connected to the vehicle body through two trailing arm bushings. Because the torsion beam body with the larger cross section is adopted to connect the two trailing arms, the suspension is a dependent suspension. When the torsion beam moves, only 1 degree of freedom is provided according to a rigid body, which is equivalent to that the wheel rotates around the connecting line of the two longitudinal arm bushings; with the flexible body, the trailing arm bushing provides the torsion beam with a certain degree of freedom in longitudinal, lateral and roll, but the inherent low degree of freedom structure of the torsion beam presents the following problems:

first, when the torsion beam is stressed longitudinally and laterally, the longitudinal stress is the same direction for the trailing arm bushing, so that the two trailing arm bushings simultaneously bear different functional requirements of the suspension in the longitudinal direction and the lateral direction. The longitudinal flexibility is high due to the requirement of smooth impact buffering; for the stability performance, the flexibility of the lateral wheel center is low, and the longitudinal rigidity of the trailing arm bushing is unique, so that the two performances cannot be considered;

when the rear wheel is subjected to lateral force, the torsion beam rotates around a virtual central point formed by two trailing arm bushings connected with the vehicle body, the rotation enables the TOE-in of the rear wheel during turning to show a state of TOE OUT, and the state enables the vehicle to tend to oversteer, so that the control stability of the vehicle is reduced.

And when the rear wheels are subjected to longitudinal braking force, the two wheels are also influenced by the flexible virtual center of the torsion beam, and the TOE-in of the rear wheels is changed to a TOE OUT state at the same time, so that the vehicle tends to oversteer during turning braking, and the control stability during turning braking is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a help promoting whole car control stability, go and obtain a car that promotes and torsion beam at rough road and the ride comfort that receives the impact.

In order to achieve the above object, the utility model provides a torsion beam, including turning round roof beam body and erection support, turn round the both ends of roof beam body and install erection support, turn round the roof beam body with erection support's junction is provided with first bolster and second bolster, first bolster set up in turn round the top of roof beam body, the second bolster set up in turn round the rear below of roof beam body, the center of first bolster with the line top-down at the center of second bolster inclines to the outside and towards the rear.

Optionally, still include eccentric subassembly, eccentric subassembly one end with the twist beam body links to each other, eccentric subassembly's the other end wears to locate rectangular downthehole, eccentric subassembly can be relative rectangular hole rotates and follows rectangular hole slides.

Optionally, the eccentric assembly comprises an eccentric bolt, an eccentric gasket and an eccentric nut, and the eccentric bolt penetrates through the mounting support and the torsion beam body and is connected with the eccentric gasket and the eccentric nut.

Optionally, the first buffer member and the second buffer member are bushings, and the eccentric bolt penetrates through a center hole of the bushing, the mounting support and the torsion beam body and is connected with the eccentric gasket and the eccentric nut.

Optionally, the elongated hole extends in an axial direction of the torsion beam body.

Optionally, the twist beam body includes a mounting bracket, the mounting bracket includes first connecting plate and second connecting plate, be equipped with the holding tank between first connecting plate and the second connecting plate, first bolster and second bolster all inlay and locate in the holding tank.

Optionally, the first buffer member and the second buffer member are embedded in the accommodating groove in an interference fit manner.

Optionally, the mounting support comprises a first mounting plate and a second mounting plate, a mounting groove is arranged between the first mounting plate and the second mounting plate, and the mounting support is arranged in the mounting groove.

Optionally, the first buffer member and the second buffer member are both hydraulic buffer members or elastic buffer members.

Based on the above object, the present invention further provides an automobile, which includes a wheel and the above torsion beam, wherein the mounting support is fixedly mounted on the inner side of the wheel.

Implement the utility model discloses an embodiment has following technological effect:

the utility model discloses set up first bolster and second bolster increase degree of freedom in the junction of torsion beam body and erection support, make the degree of freedom of whole car timing promoted, because the setting of first bolster and second bolster, the bush rigidity of trailing arm bush can set for higher value, and whole car strikes the ride comfort and can not receive the influence yet, and helps promoting the lateral rigidity of torsion beam, therefore, under different driving conditions, first, the utility model discloses when the car turns or changes the lane, help reducing the gain of swing arm angular velocity, promote the stability of vehicle; secondly, when the vehicle is braked during turning, the vehicle is braked to tend to be under-steered, and the braking stability of the vehicle is improved; thirdly, when the vehicle passes through a pulse road or a deceleration strip, the impact force can be greatly buffered, and the impact action borne by the trailing arm shaft sleeve is reduced; fourthly, when the vehicle passes through an uneven or rough road surface, partial vibration can be absorbed by the first buffer member and the second buffer member, and the fine vibration transmitted to the vehicle body through the vibration absorber and the spring is reduced.

Drawings

Fig. 1 is a partial structural schematic diagram of a preferred embodiment of the present invention;

FIG. 2 is a view of the right side of the vehicle in accordance with the preferred embodiment of the present invention;

FIG. 3 is a rear view of a vehicle in accordance with a preferred embodiment of the present invention;

fig. 4 is an exploded view of a torsion beam according to a preferred embodiment of the present invention;

FIG. 5 is a schematic diagram of the motion analysis of the working condition 1 in the preferred embodiment of the present invention;

FIG. 6 is a schematic diagram of the motion analysis of working condition 2 in the preferred embodiment of the present invention;

fig. 7 is a schematic diagram of the motion analysis of working condition 3 in the preferred embodiment of the present invention.

Description of reference numerals:

100. the torsion beam comprises a torsion beam body 110, a torsion beam body 120, a mounting support 121, a strip hole 122, a first mounting plate 123, a second mounting plate 130, a first buffer 140, a second buffer 150, an eccentric assembly 151, an eccentric bolt 152, an eccentric gasket 153, an eccentric nut 160, a mounting bracket 161, a first connecting plate 162 and a second connecting plate;

200. and (7) wheels.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship indicated based on the drawings or the vehicle, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In addition, the terms "first", "second", and the like are used in the present invention to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

Referring to fig. 1 to 7, an embodiment of the present invention provides a torsion beam 100, including twisting beam body 110 and mounting support 120, mounting support 120 is installed at both ends of twisting beam body 110, a first buffer 130 and a second buffer 140 are provided at a junction of twisting beam body 110 and mounting support 120, first buffer 130 is disposed above twisting beam body 110, second buffer 140 is disposed below and behind twisting beam body 110, and a line connecting a center of first buffer 130 and a center of second buffer 140 is inclined to the outside and the rear side from top to bottom.

Firstly, the utility model is beneficial to reducing the gain of the angular velocity of the swing arm and improving the stability of the vehicle when the vehicle turns or changes lanes; secondly, when the vehicle is braked during turning, the vehicle is braked to tend to be under-steered, and the braking stability of the vehicle is improved; thirdly, when the vehicle passes through a pulse road or a deceleration strip, the impact force can be greatly buffered, and the impact action borne by the trailing arm shaft sleeve is reduced; fourth, when the vehicle passes over an uneven or rough road surface, a portion of the vibration may be absorbed by the first and second bumpers 130 and 140, reducing the fine vibration transmitted to the vehicle body through the damper and the spring.

Specifically, from the operating condition description of the vehicle operating stability:

first, referring to fig. 3, a connection line M between the center of the first cushion member 130 and the center of the second cushion member 140 intersects the ground at a point a, a projection line of a center normal plane of the wheel 200 intersects the ground at a point B, and the point a and the point B are connected to form a friction arm L1 in the longitudinal direction of the entire vehicle.

Referring to fig. 5, a line M connecting the center of the first cushion member 130 and the center of the second cushion member 140 intersects the ground at a point a, a perpendicular line to the center of the wheel 200 intersects the ground at a point B, a tire trailing distance point C is located at about 30mm from the point B between the point a and the point B, and the point a and the point C are connected to form a rear-tilting trailing distance L2 in the lateral direction of the entire vehicle.

Working condition 1: referring to fig. 6, when the vehicle turns or changes lanes, taking the left wheel 200 of the vehicle as an example, when the vehicle turns to the right, the lateral force acts on the tire-trailing distance C from the left to the right and forms a moment at the rear-leaning distance L2, the moment makes the vehicle rotate clockwise around the point a, the left wheel 200 forms a change in the positive toe-in direction, and the right wheel 200 of the vehicle also forms a clockwise rotation, and the tendency makes the vehicle tend to understeer, so that the gain of the angular velocity of the swing arm is reduced, and the stability and the operating stability of the vehicle are improved.

Working condition 2: referring to fig. 7, when the vehicle is braked while turning, taking the left side wheel 200 as an example, when the vehicle turns right and brakes, the longitudinal force of the vehicle acts on the tire drag distance point C from front to back, and forms a moment with the friction arm L1, the moment makes the wheel 200 rotate clockwise around the point a, so that the left side wheel 200 of the vehicle forms a change in the positive toe-in direction, which is that the right side wheel 200 of the vehicle also forms a counterclockwise rotation, and because the left side wheel 200 has a larger axial load, the lateral force is also larger than the right side wheel 200, and this tendency makes the vehicle brake tend to understeer, thereby improving the braking stability of the vehicle.

Working condition 3: referring to fig. 5, when a vehicle passes through a pulse path or a deceleration strip, the vehicle may receive an oblique rear and upper impact force, and at this time, the first buffer member 130 disposed above the torsion beam body 110 and the second buffer member 140 disposed below and behind the torsion beam body 110 may greatly buffer the impact force and reduce the impact action on the trailing arm bushing;

similarly, referring to fig. 5, when the vehicle passes through an uneven or rough road surface, the wheel 200 may be vibrated upward, and at this time, the first cushion member 130 disposed above the torsion beam body 110 and the second cushion member 140 disposed behind and below the torsion beam body 110 may absorb a part of the vibration, thereby reducing the fine vibration transmitted to the vehicle body through the shock absorber and the spring.

Therefore, by providing the first buffer member 130 and the second buffer member 140, the degree of freedom in adjustment of the entire vehicle is increased, so that the rigidity of the bushing of the trailing arm bushing can be set to a high value, the impact smoothness of the entire vehicle is not affected, and meanwhile, the lateral rigidity of the first buffer member 130 and the lateral rigidity of the second buffer member 140 can be increased in a single direction, thereby facilitating the improvement of the lateral rigidity of the torsion beam 100.

Referring to fig. 1 to 4, further, in order to improve the smoothness of the vehicle, an embodiment of the present invention further includes an eccentric assembly 150, the mounting support 120 is provided with a long hole 121, one end of the eccentric assembly 150 is connected to the torsion beam body 110, the other end of the eccentric assembly 150 is inserted into the long hole 121, the eccentric assembly 150 can rotate relative to the long hole 121 and slide along the long hole 121, and the torsion beam body 110 moves along the extending direction of the long hole 121 by the rotation of the eccentric assembly 150, so as to adjust the four-wheel positioning accuracy of the torsion beam 100.

Specifically, referring to fig. 4, the eccentric assembly 150 in this embodiment includes an eccentric bolt 151, an eccentric washer 152, and an eccentric nut 153, the eccentric bolt 151 is inserted into the mounting support 120 and the torsion beam body 110 and is connected to the eccentric washer 152 and the eccentric nut 153, preferably, the first buffer 130 and the second buffer 140 are both bushings, the eccentric bolt 151 is inserted into a central hole of the bushing, the mounting support 120 and the torsion beam body 110 are connected to the eccentric washer 152 and the eccentric nut 153, so that the first buffer 130 and the second buffer 140 can generate lateral movement of a bushing point through rotation of the eccentric bolt 151 and the eccentric washer 152, and the bushings are connected to the mounting support 120 through the eccentric assembly 150, thereby simplifying a mounting structure of the bushings and reducing use of parts.

Further, the elongated hole 121 extends in the axial direction of the twist beam body 110, so that the twist beam body 110 and the wheel 200 can be laterally moved in the axial direction of the twist beam body 110 by the rotation of the eccentric bolt 151 and the eccentric washer 152.

Therefore, referring to fig. 3, in the present embodiment, when the first cushion member 130 is adjusted to the outside by the eccentric bolt 151, the camber angle of the rear wheel is increased in a positive direction, and when the second cushion member 140 is adjusted to the outside by the eccentric bolt 151, the camber angle of the rear wheel is increased in a negative direction, so that the adjustment of the camber angle is achieved by the adjustment of the eccentric bolt 151.

Referring to fig. 5, when the second cushion member 140 is adjusted outward, the toe-in angle of the rear wheel is increased positively, and conversely, is increased negatively, thereby achieving toe-in adjustment.

Through proper adjustment of the eccentric bolt 151, on one hand, the axial rigidity and the vertical radial rigidity of the first buffer member 130 and the second buffer member 140 are adjusted by increasing the automation degree of the first buffer member 130 and the second buffer member 140, and the smooth performance of adjustment of the whole vehicle is improved, and on the other hand, toe-in and camber can be adjusted to proper values, so that the four-wheel positioning accuracy of the torsion beam 100 is improved, and the problems of operation stability and tire eccentric wear caused by insufficient four-wheel positioning accuracy are reduced.

Further, referring to fig. 4, the torsion beam body 110 in this embodiment includes the mounting bracket 160, the mounting bracket 160 includes the first connecting plate 161 and the second connecting plate 162, a receiving groove is disposed between the first connecting plate 161 and the second connecting plate 162, the first buffering member 130 and the second buffering member 140 are both embedded in the receiving groove, so that the first buffering member 130 and the second buffering member 140 are fixed, and specifically, the first buffering member 130 and the second buffering member 140 are embedded in the receiving groove and are in interference fit.

The mounting support 120 includes a first mounting plate 122 and a second mounting plate 123, a mounting groove is provided between the first mounting plate 122 and the second mounting plate 123, the mounting bracket 160 is disposed in the mounting groove, specifically, the elongated hole 121 in this embodiment is disposed on the first mounting plate 122 and the second mounting plate 123, the eccentric bolt 151 penetrates through the central holes of the first mounting plate 122, the second mounting plate 123, the first connecting plate 161, the second connecting plate 162 and the bushing, and is connected to the eccentric nut 153 and the eccentric washer 152, so that the torsion beam body 110 moves relative to the mounting support 120 in the mounting groove range, and the degree of freedom at the connection between the torsion beam 100 and the wheel 200 is increased by the first cushion member 130, the second cushion member 140 and the eccentric assembly 150, so that the degree of freedom for adjusting the whole vehicle is improved.

Specifically, the first buffer 130 and the second buffer 140 in this embodiment are both hydraulic buffers or elastic buffers.

The embodiment further provides an automobile, which comprises wheels 200 and the torsion beam 100, wherein the mounting support 120 is fixedly mounted on the inner side of the wheels 200, so that the adjustability of the four-wheel positioning of the automobile is realized, the four-wheel positioning precision of the torsion beam 100 is improved, and the problems of operation stability and tire eccentric wear caused by insufficient four-wheel positioning precision are reduced.

In summary, the first buffer member 130 and the second buffer member 140 are disposed at the joint of the torsion beam body 110 and the mounting support 120 to increase the degree of freedom, so as to improve the degree of freedom of the adjustment of the whole vehicle, due to the arrangement of the first cushion member 130 and the second cushion member 140, the liner rigidity of the trailing arm liner can be set to a high value, the ride comfort of the entire vehicle is not affected, and contributes to the improvement of the lateral rigidity of the torsion beam 100, and the degrees of freedom of the first and second dampers 130 and 140 are increased by the eccentric assembly 150, the axial rigidity and the vertical radial rigidity of the first buffer member 130 and the second buffer member 140 can be adjusted, the smoothness of the whole vehicle is improved, meanwhile, the adjustability of the four-wheel positioning of the torsion beam is realized, the four-wheel positioning precision of the torsion beam 100 is improved, the structure not only keeps the advantages of the space, the cost and the weight of the torsion beam, but also improves the overall performance.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a torsion beam, its characterized in that, is including turning round roof beam body and erection support, turn round the both ends of roof beam body and install erection support, turn round the roof beam body with erection support's junction is provided with first bolster and second bolster, first bolster set up in turn round the top of roof beam body, the second bolster set up in turn round the rear below of roof beam body, the center of first bolster with the line top-down at the center of second bolster inclines to the outside and towards the rear.

2. The torsion beam according to claim 1, further comprising an eccentric assembly, wherein the mounting support is provided with a long hole, one end of the eccentric assembly is connected to the torsion beam body, the other end of the eccentric assembly penetrates through the long hole, and the eccentric assembly can rotate relative to the long hole and slide along the long hole.

3. The torsion beam according to claim 2, wherein the eccentric assembly comprises an eccentric bolt, an eccentric washer and an eccentric nut, and the eccentric bolt penetrates through the mounting support and the torsion beam body to be connected with the eccentric washer and the eccentric nut.

4. The torsion beam according to claim 3, wherein the first and second buffers are bushings, and the eccentric bolt is inserted through a central hole of the bushing, the mounting bracket and the torsion beam body and is connected with the eccentric washer and the eccentric nut.

5. The torsion beam according to claim 2, wherein the elongated hole extends in an axial direction of the torsion beam body.

6. The torsion beam according to any one of claims 1 to 5, wherein the torsion beam body includes a mounting bracket, the mounting bracket includes a first connecting plate and a second connecting plate, a receiving groove is provided between the first connecting plate and the second connecting plate, and the first buffer member and the second buffer member are both embedded in the receiving groove.

7. The torsion beam according to claim 6, wherein the first and second buffers are embedded in the receiving groove in an interference fit.

8. The torsion beam according to claim 6, wherein the mounting bracket comprises a first mounting plate and a second mounting plate, a mounting slot is provided between the first mounting plate and the second mounting plate, and the mounting bracket is disposed in the mounting slot.

9. The torsion beam according to claim 1, wherein the first and second buffers are both hydraulic buffers or elastic buffers.

10. An automobile comprising a wheel and the torsion beam of any one of claims 1 to 9, wherein the mounting bracket is fixedly mounted on the inner side of the wheel.

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