CN214189287U - Anti-torsion pull rod - Google Patents

Abstract

An anti-torsion pull rod comprises a second bushing for connecting a subframe, a first bushing for connecting a power assembly and a pull rod bracket for connecting the second bushing and the first bushing, it is characterized in that the pull rod bracket is provided with a supporting guide part at a position close to the second bushing, a cavity is arranged between the support guide part and the first bushing, the support guide part comprises a support inclined rod extending outwards from the central axis of the pull rod bracket, when antitorque pull rod receives to bump the fracture, first bush is in follow in the cavity support the down tube is to keeping away from the direction motion of pull rod support axis makes the skew pull rod support's of first bush axis, and the load that the collision produced can't transmit second bush, sub vehicle frame and passenger cabin, gets into the deformation that has reduced the passenger cabin, has improved the crashworthiness of whole car.

Description

Anti-torsion pull rod

Technical Field

The utility model relates to an automotive filed especially relates to an antitorque pull rod.

Background

As a part of the power assembly suspension system, the torsion-resistant pull rod is arranged below the power assembly and used for realizing power transmission between the power assembly and the auxiliary frame.

The torsion resistant tie rods typically include a big end bushing, a small end bushing, and a tie rod bracket located between the big end bushing and the small end bushing, wherein the small end bushing is connected to the powertrain and the big end bushing is connected to the subframe. The anti-torsion pull rod reduces the transmission of the vibration of the power assembly to the auxiliary frame through the bushings at the two ends, and the NVH performance of the whole vehicle is improved. Under the working condition of serious front collision of the whole vehicle, the power assembly moves towards the passenger compartment at a high acceleration, and then a high load is applied to a small-end bushing of the torsion-resistant pull rod. The existing torsion-resistant pull rod cannot be broken under the collision working condition, so that the load is transmitted to the auxiliary frame through the torsion-resistant pull rod and then transmitted to the passenger compartment, the deformation of the passenger compartment is increased, and the excellent collision performance of the whole vehicle cannot be obtained.

The foregoing description is provided for general background information and is not admitted to be prior art.

Disclosure of Invention

An object of the utility model is to provide an antitorque pull rod, this antitorque pull rod can be cracked when the serious head-on collision takes place for whole car, makes the load that the collision produced unable continuation transmission, and then has improved the crashworthiness of whole car.

The utility model provides an antitorque pull rod, including the first bush that is used for connecting power assembly, be used for connecting the second bush of sub vehicle frame and connect the second bush with pull rod support between the first bush, pull rod support is being close to the position of second bush is equipped with supports guide part support guide part with be equipped with the cavity between the first bush, support guide part include certainly the outside support down tube that extends of axis of pull rod support works as antitorque pull rod receives to bump when breaking, first bush is in follow in the cavity support down tube is to keeping away from the direction motion of pull rod support axis.

Further, the support guide includes two support struts intersecting at a central axis of the torsion brace.

Further, support the guide part still include with support the down tube and link to each other and follow tie rod support longitudinal extension's splice bar, support the down tube with the splice bar forms the structure of arrow point form jointly.

Further, the splice bar includes first splice bar, second splice bar and third splice bar, first splice bar extends along the axis of pull rod support, the second splice bar with the third splice bar leans out in first splice bar relatively.

Further, the torsion resistant pull rod further comprises a second bushing mounting part, a first bushing mounting part and a collapsing rod connected with the first bushing mounting part and the support diagonal rod, and the cavity is formed in the first bushing mounting part, the collapsing rod and between the support diagonal rods.

Further, an acute angle is formed between the collapsing rod and the supporting oblique rod.

Further, the surface of first bush installation department is equipped with along its axial extension's weakening groove, the weakening groove is located first bush installation department is located part in the cavity, and just right the pointed end at the connection position of support sloping bar.

Further, the first bush and the second bush are pressed into the bush mounting holes of the second bush mounting portion and the first bush mounting portion in an interference fit manner.

Furthermore, the pull rod bracket is made of aluminum extruded section.

The utility model provides an antitorque pull rod takes place when serious head-on collision at whole car, first bush installation department at the weakening trench position at first the fracture appears, make first bush move to the cavity, and along supporting the down tube motion, and then extrude the collapse pole, finally near the connection position of supporting down tube and collapse pole, the collapse pole ftracture of bursting, it is outside to make first bush move the pull rod support, so, the motion trail that makes first bush deviates with the axis of pull rod support, the load that the collision produced can't transmit the second bush again, sub vehicle frame and passenger cabin, get into the deformation that has reduced the passenger cabin, the collision performance of whole car has been improved.

Drawings

Fig. 1 is a schematic cross-sectional view of an anti-torsion bar structure according to an embodiment of the present invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

1. The device comprises a first bushing, a second bushing, a pull rod support, a first bushing, a second bushing, a first bushing inner tube, a first bushing rubber body, a first bushing outer tube, a first bushing mounting part, a first bushing outer tube, a first bushing mounting part, a second bushing outer tube, a crumple rod, a first bushing 23, a cavity, a second bushing inner tube, a support guide part, a second bushing mounting part, a second bushing inner tube 31, a second bushing inner tube 32, a second bushing rubber body, a second bushing outer tube 33, a second bushing outer tube 211, a weakening groove 241, a support inclined rod 242 and a connecting rib

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.

As shown in fig. 1 and 2, the torsion resistant tie rod of the present invention includes a first bushing 1, a second bushing 3, and a tie rod holder 2 connected between the second bushing 3 and the first bushing 1.

The first bushing 1 comprises a first bushing inner pipe 11, a first bushing rubber body 12 wrapped outside the first bushing inner pipe 11 and a first bushing outer pipe 13 wrapped outside the first bushing rubber body 12, the first bushing inner pipe 11, the first bushing rubber body 12 and the first bushing outer pipe 13 are vulcanized into a whole, and the first bushing inner pipe 11 is connected with the power assembly.

The second bushing 3 includes a second bushing inner tube 31, a second bushing rubber body 32 wrapped outside the second bushing inner tube 31, and a second bushing outer tube 33 wrapped outside the second bushing rubber body 32, the second bushing inner tube 31, the second bushing rubber body 32, and the second bushing outer tube 33 are vulcanized into a whole, and the second bushing inner tube 31 is connected to the subframe. In this embodiment, the second bushing inner tube 31 is substantially triangular, the second bushing outer tube 33 is circular, the second bushing rubber body 32 is vulcanized and connected between the second bushing inner tube 31 and the second bushing outer tube 33, and a buffer cavity substantially in a crescent shape is formed inside the second bushing rubber body 32.

The pull rod bracket 2 includes a circular first bush mounting portion 21, a crush bar 22 connected to the first bush mounting portion 21, a support guide portion 24 connected to the crush bar 22, and a circular second bush mounting portion 25 connected to the support guide portion 24.

The support guide 24 is formed of two support diagonal rods 241 and a plurality of connecting ribs 242 extending in the longitudinal direction of the tie bar bracket 2 to form a stable arrow structure. In the present exemplary embodiment, the two diagonal support rods 241 intersect at the center axis of the torsion brace. The connecting ribs 242 include a first connecting rib, a second connecting rib, and a third connecting rib, wherein the first connecting rib extends along the central axis of the drawbar support 2, and the second connecting rib and the third connecting rib lean outward slightly compared to the first connecting rib. The crush bar 22 connects the outer side of the first bushing mounting portion 21 and the support diagonal bar 241, and the crush bar 22 and the support diagonal bar 142 form an acute angle α therebetween. The first bush mounting portion 21, the crush bar 22, and the support diagonal bar 241 enclose a cavity 23 inside the tie bar bracket 2. The portion of the first bush mounting portion 21 located within the cavity 23 is provided with a weakening groove 211 extending axially therealong, the weakening groove 211 facing the tip of the arrow structure. The first bush mounting portion 21 and the second bush mounting portion 25 of the lever bracket 2 are provided with bush mounting holes for mounting the first bush 1 and the second bush 3, respectively. The first bush 1 and the second bush 3 are pressed into corresponding bush mounting holes on the pull rod bracket 2 in an interference fit mode. The pull rod bracket 2 is made of aluminum extruded section.

In the event of a frontal collision of the whole vehicle, the powertrain moves towards the passenger compartment at a high acceleration, a high load is applied to the first bushing 1, and the first bushing 1 is pushed to move towards the second bushing 3 along the longitudinal direction of the pull rod. Under such a heavy frontal collision load, the first bush mounting part 21 is first cracked at the location of the weakening groove 211, and then the first bush 1 is further moved into the cavity 23 to collide with the apexes of the two support diagonal members 241. Since the support guide 24 is a stable arrow-shaped structure, it is ensured that no fracture failure occurs during the entire collision. When the first bushing 1 hits the top of the diagonal support bar 241, it will randomly move up or down along the diagonal support bar 241, which is described as an upward movement. Support ramp 241 forms an acute angle with crush bar 22. During the movement of the first bushing 1 along the supporting diagonal 241, the first bushing 1 continuously presses the crush bar 22, eventually cracks the crush bar 22 near the angle α, and the first bushing 1 moves to the outside of the tie bar bracket 2. The movement locus of the first bush 1 is shown in the dotted line in fig. 2. Because the motion trail of the first bush 1 deviates from the central axis of the pull rod bracket 2, the load generated by collision can not be transmitted to the second bush 3, the auxiliary frame and the passenger compartment, so that the deformation of the passenger compartment is reduced, and the collision performance of the whole vehicle is improved.

To sum up, the utility model discloses an antitorque pull rod when whole car takes place serious head-on collision, first bush installation department at the weakening trench position at first the fracture appears, first bush moves to the cavity after that to along supporting the down tube motion, and then extrudees the collapse pole, finally near angle alpha, the collapse pole fracture, first bush moves the pull rod support outside. At this in-process, the movement track of first bush has skew with the axis of pull rod support, and second bush, sub vehicle frame and passenger cabin can't be transmitted to again to the load that the collision produced, and then has reduced the deformation in passenger cabin, has improved the crashworthiness of whole car, the utility model discloses an intensity of antitorque pull rod can satisfy whole car daily driving requirement, reduces the transmission of vibration of power assembly to the sub vehicle frame simultaneously, has improved whole car NVH performance.

In this document, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms can be understood in a specific case to those of ordinary skill in the art.

In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the sake of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. An anti-torsion pull rod comprises a first bushing (1) used for connecting a power assembly, a second bushing (3) used for connecting an auxiliary frame and a pull rod support (2) connected between the second bushing (3) and the first bushing (1), and is characterized in that the pull rod support (2) is provided with a supporting guide part (24) at a position close to the second bushing (3), a cavity (23) is arranged between the supporting guide part (24) and the first bushing (1), the supporting guide part (24) comprises a supporting inclined rod (241) extending outwards from the central axis of the pull rod support (2), and when the anti-torsion pull rod is broken due to collision, the first bushing (1) moves in the cavity (23) along the supporting inclined rod (241) towards a direction far away from the central axis of the pull rod support (2).

2. The torsion brace according to claim 1, wherein the support guide (24) comprises two support struts (241), the two support struts (241) intersecting at a central axis of the torsion brace.

3. The torsion beam according to claim 2, wherein the support guide (24) further comprises a connecting rib (242) connected to the support diagonal (241) and extending in a longitudinal direction of the beam support (2), the support diagonal (241) and the connecting rib (242) together forming an arrow-like structure.

4. The torsion beam according to claim 3, wherein the tie bars (242) comprise a first tie bar extending along the central axis of the brace support (2), a second tie bar and a third tie bar, the second and third tie bars being inclined outwardly with respect to the first tie bar.

5. The torsion brace according to claim 2, further comprising a second bushing mount (25), a first bushing mount (21), and a collapse rod (22) connected to the first bushing mount (21) and the support strut (241), the cavity (23) being formed between the first bushing mount (21), the collapse rod (22), and the support strut (241).

6. The torsion beam according to claim 5, wherein the collapse rod (22) forms an acute angle with the support diagonal (241).

7. The torsion beam according to claim 5, wherein the outer surface of the first bushing mount (21) is provided with a weakening groove (211) extending in an axial direction thereof, and the weakening groove (211) is formed in a portion of the first bushing mount (21) located in the cavity (23) and facing a tip of the connecting portion of the support diagonal bar (241).

8. The torsion bar according to claim 5, wherein the first bushing (1) and the second bushing (3) are press-fitted into bushing mounting holes of the second bushing mounting part (25) and the first bushing mounting part (21) in an interference fit manner.

9. The torsion beam according to claim 1, wherein the beam holder (2) is made of an aluminum extruded section.

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