阅读说明：本技术 扭力梁悬架结构及车辆 (Torsion beam suspension structure and vehicle ) 是由 王瑞林 陈龙 方彦腾 周飘儿 于 2019-10-21 设计创作，主要内容包括：本发明属于车辆悬架技术领域,尤其涉及一种扭力梁悬架结构及车辆。该扭力梁悬架结构,后横梁连接在扭力梁焊接总成上；导向组件的导向杆的第一端转动连接在后横梁上,导向杆的第二端转动连接在车辆的车身上且导向杆的第二端可沿与车辆的左车轮轮心和右车轮轮心之间的第一连线方向滑动；侧向力组件的侧向力连杆的第一端转动连接在车辆的车身上,侧向力连杆的第二端转动连接在导向杆的第一端和第二端之间。本发明在车辆转向且车轮受到侧向力时,通过扭力梁焊接总成、导向组件和侧向力组件将受到的侧向力传递到车身,进而增加扭力梁悬架结构的横向刚度,大大减小扭力梁悬架结构的横向变形,显著提高后悬架及整车的行驶稳定性。(The invention belongs to the technical field of vehicle suspensions, and particularly relates to a torsion beam suspension structure and a vehicle. In the torsion beam suspension structure, a rear cross beam is connected to a torsion beam welding assembly; the first end of a guide rod of the guide assembly is rotatably connected to the rear cross beam, the second end of the guide rod is rotatably connected to the body of the vehicle, and the second end of the guide rod can slide along a first connecting line between the wheel center of the left wheel and the wheel center of the right wheel of the vehicle; a first end of a lateral force link of the lateral force assembly is pivotally coupled to the body of the vehicle and a second end of the lateral force link is pivotally coupled between the first end and the second end of the guide bar. When the vehicle turns and the wheels are subjected to lateral force, the lateral force is transmitted to the vehicle body through the torsion beam welding assembly, the guide component and the lateral force component, so that the transverse rigidity of the torsion beam suspension structure is increased, the transverse deformation of the torsion beam suspension structure is greatly reduced, and the driving stability of a rear suspension and the whole vehicle is obviously improved.)

1. A torsion beam suspension structure is characterized by comprising a rear cross beam, a lateral force component, a guide component and a torsion beam welding assembly connected to a vehicle body of a vehicle; the rear cross beam is connected to the torsion beam welding assembly;

the guide assembly comprises a guide rod, the first end of the guide rod is rotatably connected to the rear cross beam, the second end of the guide rod is rotatably connected to the body of the vehicle, and the second end of the guide rod can slide along a direction parallel to a first connecting line between the wheel centers of the left wheel and the right wheel of the vehicle;

the lateral force assembly includes a lateral force link having a first end rotationally coupled to the body of the vehicle and a second end rotationally coupled between the first and second ends of the guide bar.

2. The torsion beam suspension structure according to claim 1, wherein a connection point is provided on a midpoint of a distance between the first end and the second end of the guide bar, and a distance between the first end of the guide bar and the connection point is equal to a distance between the first end and the second end of the lateral force link; the second end of the lateral force link is rotatably connected to the connection point of the guide rod; a second line between the second end of the guide bar and the first end of the lateral force link is parallel to the first line.

3. The torsion beam suspension structure according to claim 1, wherein the guide assembly further includes a guide bracket provided with a slide rail disposed in parallel with the first connection line, the guide bracket being mounted on a body of the vehicle; and the second end of the guide rod is provided with a guide ball which slides in the slide rail along the direction parallel to the first connecting line.

4. The torsion beam suspension structure according to claim 3, wherein the guide bracket includes a mounting plate and a side plate that are vertically connected, the slide rail is provided on the side plate, the mounting plate is provided with a mounting hole, and the mounting plate is mounted on a body of the vehicle by a bolt that passes through the mounting hole.

5. The torsion beam suspension structure according to claim 1, wherein the guide assembly further includes a first ball pin provided at a first end of the guide lever, the first end of the guide lever being rotatably connected to the rear cross member through the first ball pin.

6. The torsion beam suspension structure according to claim 1, wherein the torsion beam welding assembly includes a beam body, a left mounting bracket, and a right mounting bracket, wherein a left end of the beam body is connected to a front end of the left mounting bracket, and a right end of the beam body is connected to a front end of the right mounting bracket; the left end of the rear cross beam is connected with the rear end of the left mounting rack, and the right end of the rear cross beam is connected with the rear end of the right mounting rack.

7. The torsion beam suspension structure according to claim 6, wherein the left and right mounting brackets are symmetrically disposed, and a left end of the rear cross member and a right end of the rear cross member are symmetrically disposed.

8. The torsion beam suspension structure according to claim 6, wherein a first bushing connected to a body of the vehicle is provided on the left mounting bracket, and a second bushing connected to the body of the vehicle is provided on the right mounting bracket.

9. The torsion beam suspension arrangement of claim 1, wherein the lateral force assembly further comprises a second ball pin through which the first end of the lateral force link is pivotally connected to the body of the vehicle and a third ball pin through which the second end of the lateral force link is pivotally connected between the first and second ends of the guide bar.

10. A vehicle characterized by comprising the torsion beam suspension structure according to any one of claims 1 to 9, the vehicle further comprising a damper installed between the torsion beam welding assembly and a body of the vehicle, and a spring installed between the torsion beam welding assembly and the body of the vehicle.

Technical Field

The invention belongs to the technical field of vehicle suspensions, and particularly relates to a torsion beam suspension structure and a vehicle.

Background

The wheel of vehicle passes through suspension and body connection, for making the suspension can guarantee the accurate direction of wheel, needs under the condition of guaranteeing safety, satisfies the light in weight's of suspension requirement, simultaneously, still should promote riding comfort as far as possible. In the prior art, a torsion beam suspension is adopted for part of vehicles, wheels and a vehicle body are directly connected through the torsion beam by the torsion beam suspension, the torsion beam has certain torsional rigidity, and the wheels on two sides are separated to a certain degree; meanwhile, the torsion beam suspension has the advantages of light weight, simple structure, small occupied space and easiness in manufacturing and mounting, so that the torsion beam suspension has a large number of applications in A-level and below vehicles. However, the torsion beam suspension has the following disadvantages: the structural characteristics of the torsion beam suspension determine that when the wheel is subjected to lateral force, the lateral deformation of the vehicle is large, the lateral deformation greatly reduces the stability of the rear suspension, and the safety of vehicle running is not facilitated.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: to among the prior art, when the wheel received the yawing force, current torsion beam suspension can make the lateral deformation of vehicle great, and then can't guarantee the stability of back suspension and the problem of vehicle safety of traveling, provides a torsion beam suspension structure and vehicle.

In order to solve the above technical problems, in one aspect, an embodiment of the present invention provides a torsion beam suspension structure, including a rear cross beam, a lateral force component, a guide component, and a torsion beam welding assembly connected to a body of a vehicle; the rear cross beam is connected to the torsion beam welding assembly;

the guide assembly comprises a guide rod, the first end of the guide rod is rotatably connected to the rear cross beam, the second end of the guide rod is rotatably connected to the body of the vehicle, and the second end of the guide rod can slide along a direction parallel to a first connecting line between the wheel centers of the left wheel and the right wheel of the vehicle;

the lateral force assembly includes a lateral force link having a first end rotationally coupled to the body of the vehicle and a second end rotationally coupled between the first and second ends of the guide bar.

Optionally, a connection point is arranged at a midpoint between the first end and the second end of the guide rod, and a distance between the first end of the guide rod and the connection point is equal to a distance between the first end and the second end of the lateral force link rod; the second end of the lateral force link is rotatably connected to the connection point of the guide rod; a second line between the second end of the guide bar and the first end of the lateral force link is parallel to the first line.

Optionally, the slide rail is arranged in parallel with the first connecting line, and the guide bracket is mounted on the body of the vehicle; and the second end of the guide rod is provided with a guide ball which slides in the slide rail along the direction parallel to the first connecting line.

Optionally, the guide bracket includes mounting panel and curb plate of perpendicular connection, the slide rail sets up on the curb plate, be equipped with the mounting hole on the mounting panel, the mounting panel is installed through passing the bolt of mounting hole on the automobile body of vehicle.

Optionally, the guide assembly further includes a first ball pin disposed at the first end of the guide rod, and the first end of the guide rod is rotatably connected to the rear cross member through the first ball pin.

Optionally, the torsion beam welding assembly comprises a beam body, a left mounting rack and a right mounting rack, the left end of the beam body is connected with the front end of the left mounting rack, and the right end of the beam body is connected with the front end of the right mounting rack; the left end of the rear cross beam is connected with the rear end of the left mounting rack, and the right end of the rear cross beam is connected with the rear end of the right mounting rack.

Optionally, the left mounting rack and the right mounting rack are symmetrically arranged, and the left end of the rear cross beam and the right end of the rear cross beam are symmetrically arranged.

Optionally, a first bushing connected with the body of the vehicle is arranged on the left mounting frame, and a second bushing connected with the body of the vehicle is arranged on the right mounting frame.

Optionally, the lateral force assembly further comprises a second ball pin and a third ball pin, the first end of the lateral force link is pivotally connected to the body of the vehicle via the second ball pin, and the second end of the lateral force link is pivotally connected between the first end and the second end of the guide bar via the third ball pin.

According to the torsion beam suspension structure provided by the embodiment of the invention, the rear cross beam is connected to the torsion beam welding assembly; the first end of a guide rod of the guide assembly is rotatably connected to the rear cross beam, the second end of the guide rod is rotatably connected to the body of the vehicle, and the second end of the guide rod can slide along the direction parallel to the first connecting line; a first end of a lateral force link of the lateral force assembly is pivotally coupled to the body of the vehicle and a second end of the lateral force link is pivotally coupled between the first end and the second end of the guide bar. The guide component and the lateral force component do not generate acting force on the torsion beam welding assembly when the torsion beam suspension structure moves, namely the guide component and the lateral force component do not interfere with the movement of the torsion beam welding assembly. However, when the vehicle turns and the wheels are subjected to lateral force, the assembly, the rear cross beam, the guide assembly and the lateral force assembly can be welded through the torsion beam, the received lateral force is transmitted to the vehicle body, the transverse rigidity of the torsion beam suspension structure is further increased, the transverse deformation of the torsion beam suspension structure is greatly reduced, and the driving stability of the rear suspension and the whole vehicle is obviously improved. Meanwhile, the torsion beam suspension has the same motion and stress characteristics when the vehicle turns left or right, and the same dynamic characteristics of the whole vehicle can be ensured when the vehicle turns left or right.

In another aspect, an embodiment of the present invention further provides a vehicle including the torsion beam suspension structure, and the vehicle further includes a damper installed between the torsion beam welding assembly and a body of the vehicle, and a spring installed between the torsion beam welding assembly and the body of the vehicle.

Drawings

Fig. 1 is a schematic perspective view of a torsion beam suspension structure according to an embodiment of the present invention.

Fig. 2 is a front view of a torsion beam suspension structure according to an embodiment of the present invention.

Fig. 3 is a schematic diagram illustrating an operation principle of a torsion beam suspension structure according to an embodiment of the present invention.

The reference numerals in the specification are as follows:

1. a rear cross member; 2. a lateral force assembly; 21. a lateral force link; 22. a second ball pin; 23. a third ball pin; 3. a guide assembly; 31. a guide bar; 311. a guide ball; 33. a guide bracket; 331. a slide rail; 332. mounting a plate; 333. a side plate; 334. a bolt; 34. a first ball pin; 4. a torsion beam welding assembly; 41. a beam body; 42. a left mounting bracket; 421. a first bushing; 43. a right mounting bracket; 431. a second bushing; 5. a shock absorber; 6. a spring.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "middle", and the like, are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus are not to be construed as limiting the present invention.

As shown in fig. 1 and 2, fig. 1 is a schematic perspective view of a torsion beam suspension structure according to an embodiment of the present invention; fig. 2 is a front view of a torsion beam suspension structure according to an embodiment of the present invention. In the present invention, the term "front" refers to the upper side of the torsion beam suspension structure shown in fig. 1 (e.g., the front end of the left mounting bracket 42, the front end of the right mounting bracket 43, etc.); "rear" is the lower portion of the torsion beam suspension structure shown in fig. 1 (e.g., the rear cross member 1, the rear end of the left mounting bracket 42, the rear end of the right mounting bracket 43, etc.); the left side is the left side of the torsion beam suspension structure shown in fig. 1 (for example, the left wheel, the left mounting frame 42, the left end of the beam body 41, the left end of the rear cross beam 1, the left end of the torsion beam welding assembly 4, etc.); the "right" is the right of the torsion beam suspension structure shown in fig. 1 (for example, the right wheel, the right mounting bracket 43, the right end of the beam body 41, the right end of the rear cross member 1, the right end of the torsion beam welding assembly 4, etc.).

As shown in fig. 1 and 2, an embodiment of the present invention provides a torsion beam suspension structure, including a rear cross member 1, a lateral force member 2, a guide member 3, and a torsion beam welding assembly 4 attached to a body of a vehicle; the rear cross beam 1 is connected to the torsion beam welding assembly 4; the left wheel of the vehicle is positioned at the left end of the torsion beam welding assembly 4, and the right wheel of the vehicle is positioned at the right end of the torsion beam welding assembly 4; the direction of the lateral force applied to the left vehicle and the right vehicle is the direction of a first connecting line between the wheel center of the left vehicle and the wheel center of the right vehicle. Preferably, the rear cross member 1 is welded to the torsion beam welding assembly 4 so that the connection therebetween is stable. Understandably, in the present invention, the rear cross member 1 and the torsion beam welding assembly 4 are symmetrically disposed at both left and right ends thereof.

The guide assembly 3 comprises a guide rod 31, the first end of the guide rod 31 is rotatably connected to the rear cross beam 1, the second end of the guide rod 31 is rotatably connected to the body of the vehicle, and the second end of the guide rod 31 can slide along the direction parallel to a first connecting line between the wheel center of the left wheel and the wheel center of the right wheel of the vehicle.

The lateral force assembly 2 comprises a lateral force link 21, a first end of the lateral force link 21 being pivotally connected to the body of the vehicle and a second end of the lateral force link 21 being pivotally connected between a first end and a second end of the guide rod 31.

In the embodiment of the invention, the rear cross beam 1 is connected with the left side and the right side of the vehicle, when the wheels are subjected to lateral force, the lateral force is transmitted to the guide rod 31 and the lateral force connecting rod 21 through the torsion beam welding assembly 4 and the rear cross beam 1, and then the lateral force is transmitted to the vehicle body; when the vehicle turns, the left wheel and the right wheel simultaneously bear lateral force in the same direction, and the lateral force borne by the left side and the right side can be transmitted to the vehicle body through the same path, so that the torsion beam suspension structure has the same motion and stress characteristics when the vehicle turns left/right, and the same dynamic characteristics when the whole vehicle turns left/right are ensured; meanwhile, since the second end of the guide bar 31 is rotatably coupled to the body of the vehicle and the second end of the guide bar 31 is slidable in a direction parallel to the first line, the movement of the second end of the guide bar 31 is not completely restricted, and thus, the second end of the guide bar 31 is not subjected to a lateral force. Therefore, the lateral force applied to the wheel or torsion beam welding assembly 4 is borne by the guide rod 31 and the lateral force connecting rod 21 and supported on the vehicle body, so that the lateral force applied to the torsion beam welding assembly 4 on the stress path is reduced, the transverse rigidity of the torsion beam suspension structure is increased, the transverse deformation of the torsion beam suspension structure when the torsion beam suspension structure is subjected to steering lateral force is obviously reduced, and the driving stability of a rear suspension and the whole vehicle is effectively improved.

The guide member 3 and the lateral force member 2 of the present invention do not generate an acting force on the torsion beam welding assembly 4 when the torsion beam suspension structure moves, that is, the guide member 3 and the lateral force member 2 do not interfere with the movement of the torsion beam welding assembly 4. However, when the vehicle turns and the wheels are subjected to lateral force, the assembly 4, the rear cross beam 1, the guide component 3 and the lateral force component 2 can be welded through the torsion beam, the received lateral force is transmitted to the vehicle body, the transverse rigidity of the torsion beam suspension is further increased, the transverse deformation of the torsion beam suspension is greatly reduced, and the driving stability of the torsion beam suspension and the whole vehicle is obviously improved. Meanwhile, the torsion beam suspension has the same motion and stress characteristics when the vehicle turns left or right, and the same dynamic characteristics of the whole vehicle can be ensured when the vehicle turns left or right.

In one embodiment, as shown in fig. 1 and 2, a connection point (not shown) is provided at the midpoint of the distance between the first end and the second end of the guide rod 31, and the distance between the first end of the guide rod 31 and the connection point is equal to the distance between the first end and the second end of the lateral force link 21; the second end of the lateral force link 21 is pivotally connected to the connection point of the guide bar 31; a second line between the second end of the guide rod 31 and the first end of the lateral force link 21 is parallel to the first line. That is, the connection point and the second end of the lateral force link 21 correspond to a point B in fig. 3, the first end of the guide bar 31 corresponds to a point C in fig. 3, the second end of the guide bar 31 corresponds to a point M in fig. 3, and the first end of the lateral force link 21 corresponds to a point a in fig. 3, so in the present embodiment, MB ═ BC ═ AB in fig. 3, and therefore, a deviation Δ AC between the lateral positions of the point C and the point a shown in fig. 3 is always 0, that is, the position of the point C (the first end of the guide bar 31) does not move laterally when the wheel of the vehicle jumps vertically, and thus, the torsion beam suspension structure does not generate a lateral force when the wheel of the vehicle jumps up and down. Meanwhile, the torsion beam suspension structure can transmit lateral force in the same direction to the vehicle body from the left wheel and the right wheel at the jumping position of any wheel according to the stress path in the embodiment, the transverse rigidity of the torsion beam suspension is improved, the driving stability of the rear suspension and the whole vehicle is effectively improved, the torsion beam suspension structure has the same motion and stress characteristics when the vehicle turns left/right, and the same dynamic characteristics when the whole vehicle turns left/right are guaranteed.

In one embodiment, as shown in fig. 1 and 2, the slide rail 331 is disposed parallel to the first connection line, and the guide bracket 33 is mounted on the body of the vehicle; the second end of the guide rod 31 is provided with a guide ball 311 sliding in the slide rail 331 along the parallel direction of the first connection line. The guide ball 311 is rotatable within the slide rail 331, thereby enabling a rotational connection between the second end of the guide rod 31 and the body of the vehicle. The slide rail 331 is parallel to the first connection line, so that the guide ball 311 can move linearly in the slide rail 331 along a direction parallel to the first connection line, and further, when the left and right wheels are subjected to a lateral force, the movement of the second end of the guide rod 31 is not completely restricted, and the second end of the guide rod 31 is not subjected to the lateral force.

In one embodiment, as shown in fig. 1 and 2, the guide bracket 33 includes a mounting plate 332 and a side plate 333 that are vertically connected, the slide rail 331 is disposed on the side plate 333, a mounting hole (not shown) is disposed on the mounting plate 332, and the mounting plate 332 is mounted on the body of the vehicle by a bolt 334 that passes through the mounting hole. In the present invention, the shape of the guide bracket 33 may be different from that of the present embodiment according to the requirement, for example, the shape and the installation manner of the installation plate 332 and the side plate 333 are not limited to those shown in fig. 1 and fig. 2 in the present embodiment, but may be other shapes and installation manners as long as the second end of the guide rod 31 can slide on the guide bracket 33 in the direction parallel to the first connection line, and the second end of the guide rod 31 can be fixedly installed on the vehicle body of the vehicle by the guide bracket 33 (the fixed installation manner is not limited to the bolt 334 connection, for example, a reliable connection manner such as welding may be used).

In an embodiment, as shown in fig. 1 and 2, the guide assembly 3 further includes a first ball pin 34 disposed at a first end of the guide rod 31, and the first end of the guide rod 31 is rotatably connected to the rear cross member 1 through the first ball pin 34. That is, in the present embodiment, the first ball pin 34 can realize the rotational connection between the first end of the guide rod 31 and the rear cross beam 1, and understandably, the position of the rotational connection between the first ball pin 34 and the rear cross beam 1 is preferably the midpoint position of the rear cross beam 1, so that when the left wheel and the right wheel are simultaneously subjected to lateral forces in opposite directions, the lateral forces on the left side and the right side can be more conveniently transmitted to the vehicle body through the same path; therefore, the torsion beam suspension structure has the same motion and stress characteristics when the vehicle turns left/right, and the same dynamic characteristics when the whole vehicle turns left/right are ensured.

In one embodiment, as shown in fig. 1 and 2, the torsion beam welding assembly 4 includes a beam body 41, a left mounting bracket 42 and a right mounting bracket 43, wherein a left end of the beam body 41 is connected to a front end of the left mounting bracket 42, and a right end of the beam body 41 is connected to a front end of the right mounting bracket 43; the left end of rear beam 1 is connected with the rear end of left mounting bracket 42, and the right end of rear beam 1 is connected with the rear end of right mounting bracket 43. Preferably, the left mounting bracket 42 and the right mounting bracket 43 are symmetrically arranged, and the left end of the rear cross beam 1 and the right end of the rear cross beam 1 are symmetrically arranged. Therefore, when the left wheel and the right wheel simultaneously receive lateral forces in opposite directions, the lateral forces received by the left side and the right side can be more conveniently transmitted to the vehicle body through the same path; therefore, the torsion beam suspension structure has the same motion and stress characteristics when the vehicle turns left/right, and the same dynamic characteristics when the whole vehicle turns left/right are ensured.

In an embodiment, as shown in fig. 1 and 2, a first bushing 421 connected to the body of the vehicle is disposed on the left mounting bracket 42, and a second bushing 431 connected to the body of the vehicle is disposed on the right mounting bracket 43. That is, the left and right mounting brackets 42 and 43 are fixedly coupled to the vehicle body through the first and second bushings 421 and 431, respectively, to reliably mount the torsion beam suspension structure to the vehicle body.

In one embodiment, the lateral force assembly 2 further comprises a second ball pin 22 and a third ball pin 23, a first end of the lateral force link 21 is pivotally connected to the body of the vehicle via the second ball pin 22, and a second end of the lateral force link 21 is pivotally connected between the first end and the second end of the guide bar 31 via the third ball pin 23. That is, in the present embodiment, the second ball pin 22 may realize the rotational connection between the first end of the lateral force link 21 and the body of the vehicle, and the third ball pin 23 may realize the rotational connection between the second end of the lateral force link 21 and the point between the first end and the second end of the guide bar 31. Understandably, the position of the connection point between the third ball pin 23 and the guide rod 31 is preferably the midpoint position of the distance between the first end and the second end of the guide rod 31 (i.e. point B in fig. 3), and the connection line between the second end of the guide rod 31 and the second ball pin 22 (i.e. the connection line between AM in fig. 3) is parallel to the first connection line (i.e. slides in the direction of the first connection line between the left wheel center and the right wheel center of the vehicle to which the wheel of the vehicle is subjected); therefore, when the left wheel and the right wheel simultaneously receive lateral force in the same direction, the lateral force received by the left side and the right side can be transmitted to the vehicle body through the same path more conveniently; therefore, the torsion beam suspension structure has the same motion and stress characteristics when the vehicle turns left/right, and the same dynamic characteristics when the whole vehicle turns left/right are ensured.

To facilitate understanding of the present invention, referring to fig. 1 to 3, the operation principle of the torsion beam suspension structure in an exemplary embodiment is as follows:

when the wheels of the vehicle do not move vertically, the rear cross beam 1 is connected with the left side and the right side of the vehicle, when the wheels are subjected to lateral force, the lateral force is transmitted to the first ball pin 34 (corresponding to the point C in fig. 3) through the torsion beam welding assembly 4 and the rear cross beam 1, and then is transmitted to the vehicle body through the guide rod 31, the third ball pin 23 (corresponding to the point B in fig. 3) and the lateral force connecting rod 21, and the second ball pin 22 (corresponding to the point A in fig. 3); when the left wheel and the right wheel are simultaneously subjected to lateral forces in the same direction, the lateral forces on the left side and the right side are transmitted to the vehicle body through the same path. Since the second end of the guide bar 31 is rotatably coupled to the body of the vehicle and the guide ball 311 (corresponding to point M in fig. 3) of the second end of the guide bar 31 is slidable in the slide rail 331 of the guide bracket 33 in a direction parallel to the first line, the movement of the second end of the guide bar 31 is not completely restricted, and thus, the second end of the guide bar 31 is not subjected to a lateral force. Therefore, the lateral force applied to the wheel or torsion beam welding assembly 4 is borne by the guide rod 31 and the lateral force connecting rod 21 and supported on the vehicle body, so that the lateral force applied to the torsion beam welding assembly 4 on the stress path is reduced, the transverse rigidity of the torsion beam suspension structure is increased, the transverse deformation of the torsion beam suspension structure when the torsion beam suspension structure is subjected to steering lateral force is obviously reduced, and the driving stability of a rear suspension and the whole vehicle is effectively improved. And the torsion beam suspension structure has the same motion and stress characteristics when the vehicle turns left/right, and the same dynamic characteristics when the whole vehicle turns left/right are ensured.

When the wheel moves vertically, as shown in fig. 3, the first ball pin 34 (corresponding to point C in fig. 3) on the rear cross member 1 moves upward or downward, the second ball pin 22 (corresponding to point a in fig. 3) and the third ball pin 23 (corresponding to point B in fig. 3) rotate, and the guide ball 311 (corresponding to point M in fig. 3) rotates in the slide rail 331 of the guide bracket 33 and slides along the slide rail 331 (i.e., slides in the direction parallel to AM in fig. 3), wherein the slide rail 331 of the guide bracket 33 is parallel to the first connection line direction (i.e., parallel to the direction of the lateral force applied to the wheel of the vehicle), and the connection line between the guide ball 311 and the second ball pin 22 (i.e., the connection line between AM in fig. 3) is parallel to the slide rail 331 direction (i.e., parallel to the direction of the lateral force applied to the wheel of the vehicle). Therefore, with reference to FIG. 3 and the following calculation:

wherein:

MB is the distance between the second end of the guide bar 31 (i.e., the guide ball 311 position, i.e., point M in fig. 3) and the second end of the lateral force link 21 (i.e., the third ball pin 23 position, i.e., point B in fig. 3);

MA is the distance between the second end of the guide rod 31 (i.e., the guide ball 311 position, i.e., point M in fig. 3) and the first end of the lateral force link 21 (i.e., the second ball pin 22 position, i.e., point a in fig. 3);

AB is the distance between the first end of the lateral force link 21 (i.e., the second ball pin 22 position, i.e., point a in fig. 3) and the second end of the lateral force link 21 (i.e., the third ball pin 23 position, i.e., point B in fig. 3);

BC is the distance between the second end of the lateral force link 21 (i.e. the third ball pin 23 position, i.e. point B in fig. 3) and the first end of the guide rod 31 (i.e. the first ball pin 34 position, i.e. point C in fig. 3);

alpha is the angle between MB and MA in FIG. 3;

Δ AC is the deviation of point a and point C in lateral position (i.e., in a direction parallel to the first line).

As can be seen from the above description, since MB ═ BC ═ AB in fig. 3, the deviation Δ AC in the lateral position of the point C a shown in fig. 3 is always 0, that is, even if the wheel runout moves vertically, the point C position (the first ball pin 34) does not move laterally, and thus, the torsion beam suspension structure does not generate a lateral force when the wheel of the wheel runout up and down. Meanwhile, the torsion beam suspension structure can transmit lateral force simultaneously applied to the left wheel and the right wheel to a vehicle body at the jumping position of any one of the left wheel and the right wheel according to the stress path, so that the transverse rigidity of the torsion beam suspension is improved, and the running stability of a rear suspension and the whole vehicle is effectively improved. And the torsion beam suspension structure has the same motion and stress characteristics when the vehicle turns left/right, and the same dynamic characteristics when the whole vehicle turns left/right are ensured.

In another aspect, an embodiment of the present invention further provides a vehicle including the torsion beam suspension structure, and the vehicle further includes a damper 5 installed between the torsion beam welding assembly 4 and a body of the vehicle, and a spring 6 installed between the torsion beam welding assembly 4 and the body of the vehicle. Preferably, the dampers 5 are symmetrically arranged two, and the two dampers 5 are respectively arranged between the left mounting bracket 42 and the vehicle body and between the right mounting bracket 43 and the vehicle body. The two springs 6 are also symmetrically arranged, and the two springs 6 are respectively arranged between the left mounting frame 42 and the vehicle body and between the right mounting frame 43 and the vehicle body. The spring 6 and the damper 5 can further improve the damping performance and comfort of the vehicle.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.