CN106274331B - Torsion beam, torsion beam type suspension, automobile - Google Patents

Abstract

A kind of torsion beam, torsion beam type suspension, automobile, wherein torsion beam includes: crossbeam；The crossbeam includes the first beam, the second beam, the damper mechanism for connecting first beam and the second beam along its axis direction, and the damper mechanism is used for vibration damping when first beam and the second beam relative torsion.In the torsion beam of this programme, crossbeam can not only play the effect of support stress and stabiliser bar, additionally it is possible to by damper mechanism vibration damping and energy-absorbing, with the opposite bounce amplitude for left and right wheels of decaying.

Description

Torsion beam, torsion beam type suspension and automobile

Technical Field

The invention relates to the technical field of automobiles, in particular to a torsion beam, a torsion beam type suspension and an automobile.

Background

The existing torsion beam type suspension is mainly used as an automobile rear suspension, and the up-and-down jumping of wheels at two sides is balanced through a torsion beam so as to reduce the side inclination of the automobile and maintain the stability of the automobile.

The torsion beam type suspension has the advantages of simple structure, convenience in manufacturing, small occupied space and the like. In the current technical application, a torsion beam type suspension includes a torsion beam, which is generally composed of a cross beam and trailing arms connected to both ends of the cross beam, the cross beam is connected to the trailing arms to form an H shape, the front ends of the trailing arms are hinged to a vehicle body through rubber bushings, and the rear ends are connected to a wheel hub, a spring, a damper, and the like.

The working principle of the existing torsion beam type suspension is as follows:

when wheels at two ends of the cross beam jump up and down in consistent displacement to cause equal-amplitude deformation of suspensions at two sides, the torsion beam swings up and down around a connecting point of the front end of the longitudinal arm and the vehicle body, and the effect of buffering and damping is achieved through a spring, a damper and the like;

when the suspensions on the two sides are deformed in different amplitudes, the traditional torsion beam can reduce the relative runout of the left wheel and the right wheel through the torsional deformation of the cross beam, the torsion beam plays a role of a stabilizer bar, and most of energy generated by the relative runout of the wheels at the two ends of the cross beam is absorbed by the shock absorber.

Therefore, in the design process of a conventional torsion beam type suspension for an automobile, engineers are mainly concerned with torsional rigidity and strength of a torsion beam to obtain a cross beam capable of withstanding a large torque without excessive deformation. Meanwhile, the performance of the rear axle is matched by adjusting the rigidity and damping characteristics of elements such as springs and shock absorbers, and the cross beam only plays the roles of supporting stress and stabilizing bars and cannot play the effects of damping and absorbing energy.

Disclosure of Invention

The invention solves the problem that in the existing torsion beam type suspension, the cross beam only plays the roles of supporting stress and stabilizing a rod, but cannot play the effects of vibration reduction and energy absorption.

To solve the above problems, the present invention provides a torsion beam including: a cross beam;

the transverse beam comprises a first beam, a second beam and a vibration damping mechanism for connecting the first beam and the second beam along the axis direction of the transverse beam, and the vibration damping mechanism is used for damping vibration when the first beam and the second beam are twisted relatively.

Optionally, the damping mechanism comprises:

the spring dampers are arranged around the central axis of the cross beam, the length direction of the spring dampers is perpendicular to the central axis, and each spring damper is connected with the first beam and the second beam in a manner of resisting relative torsional movement.

Optionally, the spring damper comprises:

two vibration damping pieces which are oppositely arranged along the linear direction vertical to the central axis of the cross beam, wherein one vibration damping piece is fixedly arranged on the first beam, and the other vibration damping piece is fixedly arranged on the second beam;

a rod-like member connecting the two vibration damping members;

and the elastic piece is arranged between the two vibration damping pieces.

Optionally, the spring damper comprises:

the two opposite vibration damping pieces are fixedly arranged on the first beam;

the rod-shaped piece is connected with the two vibration damping pieces and provided with a connecting part arranged on the second beam, and the connecting part divides the rod-shaped piece into two parts;

two elastic pieces are respectively arranged on two sides of the connecting part, and each elastic piece is abutted against or connected with the vibration damping piece and the connecting part at two ends respectively.

Optionally, the damping member comprises:

the hollow cylinder body is provided with a cylinder cavity, the elastic piece is abutted against or connected with the cylinder body, and the vibration damping piece is arranged on the corresponding beam through the cylinder body;

the rod-shaped piece extends into the cylinder cavity and is connected with the piston;

and the damping material is positioned in the cylinder cavity and is used for damping vibration when the piston is extruded.

Optionally, the damping material is hydraulic oil, and the piston is provided with a plurality of through holes which axially penetrate through the piston; alternatively, the damping material is a porous material or rubber.

Optionally, the damping member is a block made of a rubber material.

Optionally, the elastic member is a coil spring, and the coil spring is sleeved outside the rod-shaped member.

Optionally, all the spring dampers are evenly arranged around the central axis of the cross beam.

Optionally, the damping mechanism includes at least one damping member made of a damping material, all of the damping members connect the first beam and the second beam in a direction parallel to the central axis of the cross beam, and the damping mechanism is capable of shear deformation to damp vibration.

Optionally, the damping mechanism further comprises: a torsion member connecting the first and second beams in a rotationally fixed manner.

Optionally, the torsion element is a torsion spring having two ends connected to the first and second beams, respectively.

Optionally, a torsion spring is provided for each of the damping members, and each torsion spring is sleeved outside the corresponding damping member.

Optionally, a first mounting seat is arranged at one end of the first beam facing the second beam, and a second mounting seat is arranged at one end of the second beam facing the first mounting seat;

the first mount having a first surface facing the second mount, the vibration reduction mechanism being mounted on the first surface to be connected to the first beam;

the second mount has a second surface facing the first mount, and the vibration damping mechanism is mounted on the second surface to be connected to the second beam.

Optionally, 1 first clamping groove is formed in the surface of the mounting seat where the vibration damping piece is located and corresponds to each vibration damping piece, and the vibration damping piece is clamped in the corresponding first clamping groove.

Optionally, the first slot is recessed in the surface of the mounting seat where the first slot is located, or the first slot is formed in a first protrusion convexly formed on the surface of the mounting seat where the first slot is located.

Optionally, 1 second card slot is provided on the second surface corresponding to each of the connection portions, and the connection portions are clamped in the corresponding second card slots.

Optionally, in the direction around the central axis of the cross beam, two side walls of each second slot are connected with reinforcing ribs, and the reinforcing ribs are installed on the second surface.

Optionally, a reinforcing rib is arranged between two adjacent second clamping grooves in the direction of the central axis of the surrounding cross beam.

Optionally, two adjacent second protrusions are connected by the same reinforcing rib in the direction around the central axis of the cross beam.

Optionally, a cover is arranged at one end of one beam towards the other beam in the first beam and the second beam, the cover is provided with a bottom and an opening towards the other beam, and the bottom is used as a mounting seat;

the mount on the other beam is located in the opening.

Optionally, in the first mounting seat and the second mounting seat, a boss located on the central axis of the cross beam is provided on one of the mounting seats toward the other mounting seat, a through hole penetrating along the central axis of the cross beam is provided in the other mounting seat, and the boss is located in the through hole.

Optionally, a first groove is formed in the outer peripheral surface of the boss facing the inner surface of the through hole, and the first groove penetrates through the boss in a manner of being opposite to the mounting seat where the boss is located;

a second groove aligned with the first groove is formed in the inner surface of the through hole, and the mounting seat where the boss is arranged is back to the second groove and penetrates through the mounting seat where the through hole is arranged;

a connecting key is optionally provided in the first and second slots.

The invention also provides a torsion beam type suspension comprising any one of the torsion beams described above.

The invention also provides an automobile which comprises the torsion beam type suspension.

Compared with the prior art, the technical scheme of the invention has the following advantages:

on one hand, when the first beam and the second beam do relative torsional movement, the vibration damping mechanism is connected with the first beam and the second beam, the torsional movement of the first beam and the second beam is transmitted to the vibration damping mechanism, and the vibration damping mechanism absorbs energy generated by the torsional movement of the first beam and the second beam, so that the relative jumping amplitude of the left wheel and the right wheel is reduced, the vehicle bump is reduced, the vehicle roll amplitude is reduced, and the vehicle balance is ensured.

On the other hand, the first beam and the second beam deform during torsional movement to buffer the torsional movement of the first beam and the second beam, and meanwhile, the torsional movement of the two connected beams gradually tends to be consistent, so that the relative jumping of the left wheel and the right wheel is reduced, and the stability of the vehicle is enhanced.

Further, when the first beam and the second beam do relative torsional movement, the torsional movement of the first beam is attenuated by the damping mechanism and then transmitted to the second beam, so that the interference of the torsional movement of the first beam on the torsional movement of the second beam is reduced, similarly, the torsional movement of the second beam is attenuated by the damping mechanism and then transmitted to the first beam, the interference of the torsional movement of the second beam on the torsional movement of the first beam is reduced, the degree of interference coupling of the torsional movement of the first beam and the torsional movement of the second beam is effectively reduced, and the steering stability and the vehicle comfort of the rear axle of the automobile are improved.

Like this, the torsion beam of this scheme not only can play the effect of stabilizer bar, can also exert the effect of damping energy-absorbing.

Drawings

FIG. 1 is a schematic illustration of the positional relationship of various components of a twist beam in accordance with an exemplary embodiment of the present invention;

FIG. 2 is a partially exploded view of a cross member of the twist beam of the first embodiment of the present invention;

fig. 3 is another partially exploded view of the cross member in the torsion beam of the first embodiment of the present invention, wherein fig. 2 and 3 show the same cross member in a different perspective view;

FIG. 4 is a schematic view of the spring damper of the twist beam of FIGS. 2 and 3;

FIG. 5 is a cross-sectional view of the damping member of the spring damper of FIG. 4;

fig. 6 is a partial perspective view of the cross member in an assembled state in the torsion beam of the first embodiment of the present invention, showing the manner of assembly between the spring damper and the first mount;

fig. 7 is a partial perspective view of the cross member in an assembled state in the torsion beam of the first embodiment of the present invention, showing the manner of assembly between the spring damper and the second mount;

FIG. 8 is another partial perspective view of the cross member in an assembled condition in the twist beam of the first embodiment of the present invention;

FIG. 9 is a further fragmentary perspective view of the cross member in an assembled condition in the twist beam of the first embodiment of the present invention;

FIG. 10 is a partial cross-sectional view of the cross beam of the torsion beam in accordance with the second embodiment of the present invention, showing the spring damper and the manner of assembly thereof with the first and second mounting brackets;

fig. 11 is a partial cross-sectional view of a cross member in a torsion beam according to a third embodiment of the present invention, showing a spring damper and the manner of assembling the spring damper with first and second mounting seats.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

The torsion beam type suspension is a suspension structure specially designed for a rear axle, and comprises a torsion beam, a hydraulic shock absorber and a spiral spring, wherein the hydraulic shock absorber and the spiral spring are arranged at two ends of the torsion beam, two ends of the torsion beam are connected with a wheel and a vehicle body or a vehicle frame through two longitudinal arms, and the longitudinal arms are connected with a wheel hub, the spring, the shock absorber and the like to achieve the effects of absorbing shock and supporting the vehicle body.

Referring to fig. 1, the torsion beam of the present embodiment includes: a cross beam 1;

the cross beam 1 comprises a first beam 11, a second beam 12 and a damping structure 10 connecting the first beam 11 and the second beam 12 along the axial direction of the cross beam, wherein the damping structure 10 is used for damping the relative torsional movement of the first beam 11 and the second beam 12.

When wheels at two ends of the cross beam 1 run on a convex road surface and jump up and down in the running process, the jumping of the wheels is transmitted to the first beam 11 and the second beam 12 and is converted into the torsional motion of the first beam 11 and the second beam 12. Compared with the prior art, when the runout displacements of the two wheels are inconsistent, the torsional motion, such as the torsional rate and the amplitude, of the first beam 11 and the second beam 12 are different, and relative torsion is generated between the two beams. At this time, since the damping mechanism 10 connects the first beam 11 and the second beam 12, the torsional motion of the first beam 11 and the second beam 12 is transmitted to the damping mechanism 10, and the damping mechanism 10 absorbs the energy of the torsional motion of the first beam 11 and the second beam 12, so as to reduce the relative bounce amplitude of the left and right wheels, reduce the vehicle bump, reduce the vehicle roll amplitude, and ensure the vehicle balance.

On the other hand, the first beam 11 and the second beam 12 can deform during twisting movement, the deformation can slow down the twisting movement of each beam, meanwhile, the first beam 11 and the second beam 12 are connected together through the damping mechanism 10, the twisting movements of the first beam 11 and the second beam 12 gradually tend to be consistent, so that the jumping of the two wheels tends to be consistent, the cross beam 1 can play a role of a stabilizer bar to reduce the relative jumping of the left wheel and the right wheel, and the stability of the vehicle is enhanced.

Further, when the first beam 11 and the second beam 12 perform relative torsional movement, the torsional movement of the first beam 11 is damped by the damping mechanism 10 and then transmitted to the second beam 12, so that interference of the torsional movement of the first beam 11 with the torsional movement of the second beam 12 is reduced, and similarly, the torsional movement of the second beam 12 is damped by the damping mechanism 10 and then transmitted to the first beam 11, so that interference of the torsional movement of the second beam 12 with the torsional movement of the first beam 11 is reduced. Therefore, the damping mechanism 10 effectively reduces the degree of interference coupling between the torsional movement of the first beam 11 and the torsional movement of the second beam 12, and improves the handling stability and the vehicle comfort of the rear axle of the automobile.

Thus, the torsion beam of the present embodiment can not only play a role of a stabilizer bar, but also play a role of vibration damping and energy absorption.

In addition, referring to fig. 1, the torsion beam further includes: and two trailing arms 13 which are respectively positioned at two ends of the cross beam 1 and are connected with the first beam 11 and the second beam 12. The trailing arm 13 is connected to the vehicle body at its front end, and is connected to the hub at its rear end, and a spring, a damper (not shown), and the like are connected thereto. When the wheels on the two sides of the beam 1 jump, the springs and the shock absorbers can absorb most of energy generated by the wheel jumping, reduce the vibration amplitude transmitted to the vehicle body from the uneven road surface and keep the vehicle stable. The vibration damping mechanism 10 in the cross beam 1 in the embodiment can further damp the runout amplitude of the left wheel and the right wheel, and the stability of the vehicle is better maintained.

The following describes a specific structure of the damper mechanism 10.

Referring to fig. 2 and 3, a first mounting seat 14 is arranged at one end of the first beam 11 facing the second beam 12, a second mounting seat 15 is arranged at one end of the second beam 12 facing the first mounting seat 14, and the first mounting seat 14 and the second mounting seat 15 are opposite to each other along the axial direction of the cross beam;

the damping mechanism 10 is connected to the first mount 14 and the second mount 15, respectively, to connect the first beam 11 and the second beam 12 together.

Referring to fig. 4 in combination, the damping mechanism 10 includes: 4 spring dampers 100 arranged around the central axis of the beam, each spring damper 100 comprising:

the two vibration damping pieces 101 are oppositely arranged along a central axis perpendicular to the cross beam, the first mounting seat 14 is provided with a first surface 140 facing the second mounting seat 15, and the two vibration damping pieces 101 are fixedly arranged on the first surface 140;

a rod-like member 102 connecting the two vibration dampers 101, the second mount 15 having a second surface 150 facing the first mount 14, the rod-like member 102 being provided with a connecting portion 120 mounted on the second surface 150, the connecting portion 120 partitioning the rod-like member 102 into two parts;

two coil springs 103 respectively located at two sides of the connecting portion 120, and two ends of each coil spring 103 may abut against or connect the damping member 101 and the connecting portion 120.

Referring to fig. 2 to 4, the spring damper 100 operates on the following principle:

firstly, defining the left side damping piece of fig. 4 as a damping piece 101a, the right side damping piece as a damping piece 101b, defining the left side coil spring as a coil spring 103a, and the right side coil spring as a coil spring 103 b;

when the second beam 12 makes torsional motion relative to the first beam 11 and drives the rod-shaped member 102 to move along the axial direction thereof to the right side of fig. 4 through the connecting part 120, the spiral spring 103b is compressed and slows down the rod-shaped member 102 from moving rightwards, so that the torsional motion of the second beam 12 is slowed down, meanwhile, the rod-shaped member 102 extrudes the vibration damping member 101b in the moving process, the vibration damping member 101b absorbs energy generated by the axial motion of the rod-shaped member 102, the axial motion displacement of the rod-shaped member 102 is reduced, the torsional motion amplitude of the second beam 12 and the first beam 11 is further reduced, and the vibration damping purpose is realized;

when the second beam 12 is twisted relative to the first beam 11 and the rod-shaped member 102 is driven by the connecting portion 120 to move to the left side of fig. 4, the coil spring 103a is compressed and slows down the left movement of the rod-shaped member 102, so as to slow down the torsion of the second beam 12, and simultaneously the rod-shaped member 102 presses the vibration damping member 101a in the moving process, and the vibration damping member 101a absorbs energy generated by the axial movement of the rod-shaped member 102, so that the purpose of absorbing vibration is achieved.

When the wheels run on bumps, the wheels bounce up and down in a reciprocating mode, so that the second beam 12 makes reciprocating torsional motion relative to the first beam 11, the rod-shaped member 102 reciprocates along the axial direction of the rod-shaped member, and the two vibration damping members 101 can reduce the reciprocating displacement of the rod-shaped member 102 and reduce the rolling amplitude of the vehicle;

as an example, the coil spring 103 is connected to the adjacent damper 101 and the connecting portion 120. When the rod-shaped member 102 moves to the right side of fig. 4, the spiral spring 103a is stretched to further slow down the rightward movement of the rod-shaped member 102, so that the torsion of the second beam 12 is greatly slowed down, the deformation of the first beam 11 and the deformation of the second beam 12 tend to be consistent, the relative runout of the two wheels is reduced, and the balance of the vehicle is ensured;

when the rod 102 moves to the left in fig. 4, the coil spring 103b is stretched to further slow the rod 102 from moving to the left, and the torsion of the second beam 12 is further slowed, and the deformation of the first beam 11 and the second beam 12 is made to coincide more quickly.

In the present embodiment, referring to fig. 4 and 5, the damper 101 includes:

a hollow cylinder 110 mounted on a first surface 140 (refer to fig. 2) of the first mounting seat 14 and having a cylinder cavity 111, wherein the coil spring 103 abuts against or is connected to the cylinder 110, specifically, a gasket 112 is disposed between the coil spring 103 and the cylinder 110, the gasket 112 is fixedly disposed on the cylinder 110, and the coil spring 103 is connected to or abuts against the gasket 112;

the piston 120 is arranged in the cylinder cavity 111, the rod-shaped member 102 extends into the cylinder cavity 111 through the gasket 112 and is connected with the piston 120, and the piston 120 separates the cylinder cavity 111 into a first inner cavity 113 and a second inner cavity 114;

a damping material 130 disposed within the first and second internal cavities 113, 114. When the rod-like member 102 reciprocates in the axial direction thereof, the piston 120 reciprocates in the cylinder chamber 111, the piston 120 alternately presses the damping material 130 in the first internal chamber 113 and the second internal chamber 114 during the reciprocation, and the damping material 130 is pressed to damp vibration.

The damping material 130 is hydraulic oil, and the piston 120 is provided with a plurality of narrow through holes 121 penetrating along the axial direction of the rod-shaped member 102. Thus, during the reciprocating movement of the rod 102, the hydraulic oil repeatedly flows through the through hole 121 into the second chamber 114 from the first chamber 113 and into the first chamber 113 from the second chamber 114. At this time, the friction between the wall of the through hole and the oil and the friction in the liquid molecule caused by the piston 120 squeezing the hydraulic oil form a damping force to the vibration, and finally the vibration energy of the vehicle is converted into heat energy, and the heat energy is absorbed by the oil and the cylinder 110 and transmitted to the atmosphere.

Besides hydraulic oil, the damping material 130 may be a porous material, which is a material having a network structure formed by interconnected or closed pores, and the pores can effectively absorb vibration. Alternatively, the damping material 130 may be selected from a rubber material.

Further, the method can also comprise the following steps: a rubber material is used instead of the damper 101 of the present embodiment.

Referring to fig. 4, the present embodiment uses coil springs 103a, 103b to dampen the relative torsional movement of the first and second beams 11, 12. Other types and configurations of springs or elastic members may be used for cushioning purposes, such as torsion springs, in addition to the choice of coil springs. Further, the coil springs 103a and 103b are sleeved outside the rod-shaped member 102, so that the installation stability of the coil springs can be ensured. As a modification, the coil spring may be connected to the connecting portion and the damper member by welding at both ends thereof without being fitted over the rod-like member. When other elastic members are used instead of the coil springs, the elastic members may be connected to the connection portions and the damping members according to a specific installation environment.

It should be noted that, in fig. 2 and 3, the damping mechanism 10 includes 4 spring dampers 100, and the number of spring dampers 100 does not limit the protection scope of the present invention. As a modification, the number of the spring damper is at least two, which can be selected as needed. In addition, all the spring dampers 100 are uniformly arranged around the central axis of the cross beam, so that the vibration is uniformly attenuated, and the vibration is prevented from being concentrated on one or more spring dampers to increase the vibration damping load, which is beneficial to ensuring that the vibration damping mechanism 10 has a better service life.

Referring to fig. 2 and 6, 1 first protrusion 16 is convexly provided on the first surface 140 of the first mounting seat 14 corresponding to each damping member 101, a first slot 160 is formed in the first protrusion 16, and the damping member 101 is clamped in the corresponding first slot 160 to be fixed on the first mounting seat 14. Two first locking grooves 160 are oppositely arranged on the first surface 140 corresponding to the two damping members 101 of each spring damper 100, the two first locking grooves 160 are respectively provided with an opening, the openings of the two first locking grooves 160 are oppositely arranged, and the cylinder body 110 of each damping member 101 is clamped in the corresponding first locking groove 160.

As a modification, it is also possible to: the first clamping groove is arranged in the first surface in a concave mode.

Referring to fig. 3 and 7, on the second surface 150 of the second mounting seat 15, a second protrusion 17 is convexly provided corresponding to each connecting portion 120, a second locking groove 170 is formed in the second protrusion 17, and the connecting portion 120 is locked in the corresponding second locking groove 170. In the direction around the central axis of the cross beam, the second engaging groove 170 has opposite side walls 171, the connecting portion 120 is tightly clamped between the side walls 171, and the side walls 171 limit the connecting portion 120. Wherein, 4 connecting portions 120 corresponding to 4 spring damper 100 are provided with 4 second protrusions 17 and 4 corresponding second slots 170, and 4 second protrusions 17 and 4 corresponding second slots 170 are arranged around the central axis of the beam due to the arrangement of 4 spring damper 100 around the central axis of the beam.

Further, in the direction around the central axis of the second beam 12, two side walls 171 of each second engaging groove 170 are connected with the reinforcing ribs 18, wherein one reinforcing rib 18 is disposed between two adjacent second engaging grooves 171, and two adjacent second protrusions 17 are connected by the same reinforcing rib 18. The ribs 18 are mounted on the second surface 150 and 4 second projections 17 are connected together by 4 ribs 18. When the second beam 12 is twisted with respect to the first beam 11, the connecting portion 120 reciprocates along with the rod 102 to apply a large pressure to the two side walls 171 of the second engaging groove 170, and the reinforcing rib 18 enables the two side walls 171 of the second engaging groove 170 to resist the large pressure, thereby enhancing the strength of the two side walls 171 and preventing the two side walls 171 from being broken due to the pressure.

In fig. 3 and 7, the reinforcing ribs 18 are curved, which does not limit the scope of the present invention, and the shape of the reinforcing ribs 18 may be designed as desired. Further, as a modification, there may be: two reinforcing ribs are arranged between every two adjacent second protrusions, and each reinforcing rib is independently connected with one side wall of each adjacent second clamping groove.

As a modification, it is also possible to: the second clamping groove is arranged in the second surface in a concave mode.

With continued reference to fig. 2 and 3, at the end of the first beam 11 facing the second beam 12, a hood 19 is provided, the hood 19 having an opening 190 facing the second beam 12, the first mount 14 serving as a bottom of the hood 19;

referring collectively to fig. 8, the second mount 15 is positioned in the opening 190 to form a closed enclosure, and all of the spring dampers 100 are housed in the enclosure 19, which enhances the compactness of the twist beam.

Further, the second surface 150 of the second mounting seat 15 is abutted against the first protrusion 16 in a direction parallel to the central axis of the cross beam, the first slot 160 and the second surface 150 enclose a receiving space close to the closed receiving space, the damping member 101 is received in the receiving space, the receiving space can limit the damping member 101 well, the stability of the damping member 101 is increased, and the mounting stability of the damping mechanism 10 is improved.

As a modification, it is also possible to: and a cover is arranged at one end of the second beam facing the first beam, the bottom of the cover is used as a second mounting seat, and the first mounting seat is positioned in the opening of the cover.

Referring to fig. 2, 3 and 9, the second mounting seat 15 is provided with a first boss 151 located on the central axis of the cross beam toward the first mounting seat 14, and the first mounting seat 14 is provided with a through hole 141 penetrating along the central axis of the cross beam. The first boss 151 is located in the through hole 141 to form a shaft hole fit, and its purpose is to provide support for relative twisting of the first beam 11 and the second beam 12, while ensuring that the first beam 11 and the second beam 12 twist about the same axis.

As an alternative embodiment, the first mount 14 is provided with a second boss 142 toward the second mount 15, and the through-hole 141 is formed in the second boss 142. The second bosses 142 relatively increase the length of the through-holes 141 in the axial direction thereof, and increase the diametrically opposed areas between the first bosses 151 and the through-holes 141, which can provide more stable and stronger support for the relative torsion of the first beam 11 and the second beam 12.

Further, with combined reference to fig. 9, in the assembled state, a first groove 152 is provided in an outer peripheral surface of the first boss 151 opposite to the inner surface of the through hole 141, the first groove 152 penetrating the first boss 151 away from the second mount 15;

a second groove 143 is formed in an inner surface of the through hole 141 to be aligned with the first groove 152, the second groove 143 penetrates the first mounting seat 14, and the first groove 152 and the second groove 143 are aligned to form a receiving space. The first beam 11 and the second beam 12 are both U-shaped beams, and the opening of the accommodating space is located in the U-shaped opening of the first beam 11 according to the application environment.

When the vehicle runs on a flat road surface without the torsion beam exerting a vibration damping effect, the connecting key 20 may be installed in the accommodating space through the U-shaped opening of the first beam 11 and pressed into the first and second grooves 152 and 143, so that the first and second beams 11 and 12 are connected together by the connecting key 20 without relative torsional movement. This contributes to the stability of the vehicle during cornering. When the torsion beam is required to exert a vibration damping effect, the connecting key 20 can be removed to allow relative torsional movement between the first beam 11 and the second beam 12. Therefore, the connection key 20 can be selectively installed in the first and second grooves 152 and 143 as needed.

As a modification, the following may be mentioned: the first mounting seat is provided with a first boss towards the second mounting seat, the second mounting seat is provided with a second boss towards the first mounting seat, the two bosses are located on the central axis of the cross beam, the second boss is provided with a through hole penetrating through the second mounting seat and the second mounting seat along the central axis of the cross beam, and the first boss can stretch into the through hole.

In other embodiments, when the first and second beams are V-shaped beams, the opening of the receiving space is located in the V-shaped opening of the respective beam. As a modification, when the first and second beams are tubular beams, openings may be opened in the beam bodies of the tubular beams to facilitate installation of the connection keys.

Second embodiment

The second embodiment differs from the first embodiment in that:

referring to fig. 10, fig. 10 is a partial sectional view of a torsion beam 20, and a spring damper 200 includes:

the damping pieces 201 are oppositely arranged along the direction perpendicular to the central axis of the cross beam, wherein one damping piece 201 (the left side in fig. 10) is arranged on a first surface 210 of the first mounting seat 21 facing the second mounting seat 22, and the other damping piece 201 (the right side in fig. 10) is arranged on a second surface 220 of the second mounting seat 22 facing the first mounting seat 21;

a rod-shaped member 202 connecting the two vibration dampers 201;

the coil spring 203 sleeved on the rod-shaped member 202 is abutted against or connected with the two vibration damping members 201.

Since the two damping members 201 are fixed to different mounting seats, when the first and second beams (not shown) of the torsion beam 20 are twisted relatively, the two damping members 201 compress the coil springs 203 to be deformed, and the coil springs 203 are deformed to damp the twisting motion of the two beams. Meanwhile, the rod-shaped member 203 applies axial pressure to the vibration reduction members 201 at the two ends, and the two vibration reduction members 201 absorb energy generated by vibration, thereby realizing a vibration reduction function.

In fig. 10, the first surface 210 is convexly provided with a third protrusion 211 corresponding to the left vibration damping member 201, the second surface 220 is convexly provided with a fourth protrusion 222 corresponding to the right vibration damping member 201, and the third protrusion 211 and the fourth protrusion 222 are oppositely arranged;

a third clamping groove 212 is formed in the third protrusion 211, and the left vibration damping member 201 is clamped in the third clamping groove 212; a fourth locking groove 221 is formed in the fourth protrusion 222, and the right-hand damping member 201 is locked in the fourth locking groove 221.

Except for the differences from the first embodiment, the torsion beam structure of the second embodiment can refer to the related contents of the first embodiment, and is not repeated herein.

Third embodiment

The third embodiment is different from the first and second embodiments in that:

referring to fig. 11, fig. 11 is a partial sectional view of the torsion beam 30, and the vibration damping mechanism 300 includes:

3 vibration damping pieces 301 made of damping materials, wherein the vibration damping pieces 301 are connected with the first mounting seat 310 and the second mounting seat 320 along the direction parallel to the central axis of the cross beam.

The damping member 301 is shear-deformed during relative torsional movement of the first beam 31 and the second beam 32, and the damping member 301 is shear-deformed back and forth during reciprocal torsional movement of the first beam 31 and the second beam 32 about the central axis of the cross member. In the shearing deformation process, the internal friction of the damping material consumes the energy generated by vibration, and the aim of vibration reduction is fulfilled.

To enhance the torsional strength of damping mechanism 300, damping mechanism 300 further comprises: torsion element 302, which connects first mounting base 310 and second mounting base 320 in a rotationally fixed manner and is fitted over vibration damper 301. The torsion member 302 is selected from torsion springs which are sleeved outside the damper 301 and both ends of which may be welded to the first and second mounting seats 310 and 320.

It should be noted that the damping mechanism 300 of fig. 11 includes 3 damping members 301, and the number of the damping members 301 does not limit the protection scope of the present invention. As a modification, the number of the vibration damping members is selected according to the size of each vibration damping member, the damping characteristics each vibration damping member has, and the specific application, and the number of the vibration damping members may be at least 1. For example, if each of the vibration damping members has a large volume and strong damping, the number of the vibration damping members need not be too large, and conversely, if each of the vibration damping members has a small volume and weak damping, the vibration damping members need to be arranged in a large number.

In addition, as a modification, the torsion spring may be connected to the first mounting seat and the second mounting seat relatively independently of each other without being fitted over the damper. Furthermore, the type of torsion element can also be selected to be other torsion elements than torsion springs.

Except for the differences from the first and second embodiments, the other structures of the torsion beam of the third embodiment can refer to the contents of the first and second embodiments, and are not repeated herein.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (18)

1. A twist beam, comprising: a cross beam;

the transverse beam comprises a first beam, a second beam and a vibration damping mechanism for connecting the first beam and the second beam along the axial direction of the transverse beam, and the vibration damping mechanism is used for damping vibration when the first beam and the second beam are twisted relatively;

the vibration damping mechanism includes: the spring dampers are arranged around the central axis of the cross beam, the length direction of the spring dampers is perpendicular to the central axis of the cross beam, and each spring damper is connected with the first beam and the second beam in a manner of resisting relative torsional movement;

the spring damper includes: two vibration damping pieces which are oppositely arranged along the linear direction vertical to the central axis of the cross beam, wherein one vibration damping piece is fixedly arranged on the first beam, and the other vibration damping piece is fixedly arranged on the second beam; a rod-like member connecting the two vibration damping members; the elastic piece is arranged between the two vibration damping pieces; or,

the spring damper includes: the two opposite vibration damping pieces are fixedly arranged on the first beam; the rod-shaped piece is connected with the two vibration damping pieces and provided with a connecting part arranged on the second beam, and the connecting part divides the rod-shaped piece into two parts; two elastic pieces are respectively arranged on two sides of the connecting part, and each elastic piece is abutted against or connected with the vibration damping piece and the connecting part at two ends respectively.

2. The twist beam defined in claim 1, wherein said vibration dampening member comprises:

the hollow cylinder body is provided with a cylinder cavity, the elastic piece is abutted against or connected with the cylinder body, and the vibration damping piece is arranged on the corresponding beam through the cylinder body;

the rod-shaped piece extends into the cylinder cavity and is connected with the piston;

and a damping material located inside the cylinder chamber for being pressed to damp vibration when the piston reciprocates.

3. A twist beam as set forth in claim 2, wherein said vibration dampening material is hydraulic oil, and said piston is provided with a plurality of axially extending through-holes; or,

the vibration damping material is porous material or rubber.

4. A twist beam as set forth in claim 1, wherein said vibration damping member is a mass member made of a rubber material.

5. The twist beam defined in claim 1, wherein said resilient member is a coil spring, said coil spring being disposed about said rod member.

6. The twist beam defined in claim 1, wherein all of said spring dampers are uniformly arranged about said cross-beam central axis.

7. The twist beam of claim 1, wherein an end of the first beam facing the second beam is provided with a first mounting seat, an end of the second beam facing the first mounting seat is provided with a second mounting seat, the first mounting seat having a first surface facing the second mounting seat, the second mounting seat having a second surface facing the first mounting seat;

for the spring dampers, in which the two damping members are fixedly mounted to the first beam and the second beam, respectively, one of the damping members is mounted on the first surface to be connected to the first beam, and the other damping member is mounted on the second surface to be connected to the second beam.

8. The torsion beam according to claim 7, wherein 1 first engaging groove is provided on a surface of the mounting seat where the damping member is provided, corresponding to each damping member, and the damping member is engaged with the corresponding first engaging groove.

9. The twist beam of claim 8, wherein the first notch is recessed in a surface of the receptacle or the first notch is formed in a first protrusion formed on a surface of the receptacle.

10. The twist beam of claim 1, wherein an end of the first beam facing the second beam is provided with a first mounting seat, an end of the second beam facing the first mounting seat is provided with a second mounting seat, the first mounting seat having a first surface facing the second mounting seat, the second mounting seat having a second surface facing the first mounting seat;

for the spring damper with the two damping pieces fixedly arranged on the first beam, 1 second clamping groove is arranged on the second surface corresponding to each connecting part, and the connecting parts are clamped in the corresponding second clamping grooves.

11. The twist beam of claim 10, wherein said second detent is recessed in said second surface or said second detent is formed in a second projection that is raised from said second surface.

12. The twist beam defined in claim 11, wherein each of said second pockets has reinforcing ribs attached to side walls thereof on opposite sides thereof in a direction around a central axis of said cross member, said reinforcing ribs being mounted on said second surface.

13. The twist beam defined in claim 12, wherein a reinforcement rib is disposed between adjacent ones of said second pockets in a direction around a central axis of said cross beam.

14. The twist beam of claim 7 wherein one of said first and second beams has a hood at an end thereof facing the other beam, said hood having a bottom and an opening facing said other beam, said bottom serving as a mounting seat;

the mount on the other beam is located in the opening.

15. The twist beam defined in claim 7, wherein one of said first and second mounting blocks is provided with a boss located on the central axis of said cross-beam toward the other mounting block, said other mounting block having a through-hole extending therethrough along the central axis of said cross-beam, said boss being located in said through-hole.

16. The torsion beam according to claim 15, wherein a first groove is provided in an outer peripheral surface of the boss opposite to an inner surface of the through hole, the first groove penetrating the boss away from the mount base where the boss is located;

a second groove aligned with the first groove is formed in the inner surface of the through hole, and the mounting seat where the boss is arranged is back to the second groove and penetrates through the mounting seat where the through hole is arranged;

a connecting key is optionally provided in the first and second slots.

17. A torsion beam suspension characterized by comprising the torsion beam according to any one of claims 1 to 16.

18. An automobile comprising a twist beam suspension according to claim 17.