CN218929120U

CN218929120U - Rear suspension system adopting straight bolt connection

Info

Publication number: CN218929120U
Application number: CN202223316921.8U
Authority: CN
Inventors: 魏心海; 赵文涛; 孙岳; 王启栋
Original assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Current assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-04-28
Anticipated expiration: 2032-12-12

Abstract

The utility model relates to the technical field of rear suspension systems, in particular to a rear suspension system connected by adopting straight bolts, which comprises a frame, wherein a balance shaft assembly is arranged on the frame, two rows of straight bolts are arranged on the balance shaft assembly, a leaf spring assembly is arranged between the two rows of straight bolts, leaf spring pressing blocks for fastening the leaf spring assembly are arranged at the tops of the two rows of straight bolts, and a lug for preventing the heads of the bolts from rotating is arranged on the balance shaft assembly; the steel plate spring assembly and the balance shaft assembly are fixed by adopting a mode of pressing the block by the straight thread bolt, so that the stress concentration of a contact surface is reduced, and the problem that the safety running of a vehicle is influenced due to the breakage of a bolt is avoided.

Description

Rear suspension system adopting straight bolt connection

Technical Field

The utility model relates to the technical field of rear suspension systems, in particular to a rear suspension system connected by adopting straight bolts.

Background

The leaf spring assembly is widely applied to the field of commercial vehicles, and mainly plays a role in bearing the load impact of wheels on a frame, buffering and damping and meeting the running stability and smoothness of the vehicle; the steel plate spring assembly is fixed with the balance shaft assembly in a mode of connecting a U-shaped bolt and a nut, stress concentration is easy to occur at the corner of the U-shaped bolt, and then the U-shaped bolt is broken, so that safe running of a vehicle is affected.

The patent application publication number CN 112721556A discloses a balanced suspension assembly, which also uses U-bolts and nuts to connect the leaf spring assembly and the balance shaft assembly, and the above-mentioned problems are also present.

Disclosure of Invention

The utility model mainly aims to provide a rear suspension system adopting straight bolt connection, which solves the problems that in the prior art, a steel plate spring assembly and a balance shaft assembly are fixed in a mode of adopting a U-shaped bolt and a nut, stress concentration is easy to occur at the corner of the U-shaped bolt, and the U-shaped bolt is broken to influence the safe running of a vehicle.

In order to achieve the above purpose, the utility model provides a rear suspension system adopting straight bolt connection, which comprises a frame, wherein a balance shaft assembly is arranged on the frame, two rows of straight bolts are arranged on the balance shaft assembly, a leaf spring assembly is arranged between the two rows of straight bolts, and leaf spring pressing blocks for fastening the leaf spring assembly are arranged at the tops of the two rows of straight bolts; the plate spring assembly and the balance shaft assembly are fixed by penetrating a plate spring pressing block on a straight bolt, so that stress concentration of a contact surface is reduced, and the anti-loosening capability of the system is effectively improved.

Further, the balance shaft assembly is provided with a lug for preventing the head of the bolt from rotating; the lug prevents the head of the bolt from rotating, and the regular re-tightening of the straight bolt is facilitated.

Further, the leaf spring assembly comprises a bolt and a plurality of plate bodies, wherein bolt holes are formed in the plate bodies, the bolt is arranged in each bolt hole, and arc-shaped chamfers are arranged at the top and the bottom of each plate body bolt hole; through setting up the arc chamfer, reduce leaf spring stress concentration, improve leaf spring's fatigue life.

Further, a jack block is arranged at the bottom of the balance shaft assembly; the jack block is used as a jack fulcrum position during maintenance to prevent the jack from damaging other positions of the suspension system.

Further, both ends of the plate spring pressing block are connected with a slide plate seat, the bottom of the slide plate seat is connected with a rubber support, and the lower part of the rubber support is connected with an axle.

Further, a lower thrust rod assembly is connected between the axle and the balance shaft assembly, and a V-shaped push assembly is connected between the axle and the frame.

Further, a guide plate and limiting blocks are arranged on the frame, and the limiting blocks are positioned on two sides of the leaf spring assembly and are obliquely arranged in a direction approaching to the leaf spring assembly; the limiting block assembly is obliquely arranged, so that the limiting block assembly can better contact the leaf spring in the limiting of the suspension system, and the limiting capacity is enhanced.

The steel plate spring assembly and the balance shaft assembly are fixed by adopting a mode of pressing the block by the straight thread bolt, so that the stress concentration of a contact surface is reduced, and the problem that the safety running of a vehicle is influenced due to the breakage of a bolt is avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

FIG. 1 is a schematic diagram of an embodiment;

FIG. 2 is a schematic top view of an embodiment;

FIG. 3 is a schematic diagram of a balance shaft assembly according to an embodiment;

FIG. 4 is a schematic view of a leaf spring assembly according to an embodiment;

FIG. 5 is a schematic view of the cross-section of A-A of FIG. 4;

FIG. 6 is an enlarged partial schematic view of FIG. 5;

in the figure: 1. a frame; 2. a balance shaft assembly; 21. a bump; 22. a jack block; 3. a straight bolt; 4. a leaf spring assembly; 41. a plate body; 42. a bolt; 43. arc chamfering; 5. a plate spring pressing block; 6. a slide plate seat; 7. a rubber support; 8. an axle; 9. a lower thrust rod assembly; 10. v pushing assembly; 11. a guide plate; 12. and a limiting block.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1 and 2, a rear suspension system adopting straight bolt connection comprises a frame 1, wherein a balance shaft assembly 2 is arranged on the frame 1, a leaf spring assembly 4 is arranged on the balance shaft assembly 2, two ends of a leaf spring pressing block 5 are connected with a sliding plate seat 6, the bottom of the sliding plate seat 6 is connected with a rubber support 7, and an axle 8 is connected below the rubber support; a lower thrust rod assembly 9 is connected between the axle 8 and the balance shaft assembly 2, and a V-shaped push assembly 10 is connected between the axle 8 and the frame 1.

Referring to fig. 1, a guide plate 11 and a stopper 12 are mounted on a frame 1, and the stopper 12 is positioned at both sides of a leaf spring assembly 4 and is inclined in a direction approaching the leaf spring assembly 4; the limiting block assembly is obliquely arranged, so that the limiting block assembly can better contact the leaf spring in the limiting of the suspension system, and the limiting capacity is enhanced.

Referring to fig. 1 and 2, two rows of straight bolts 3 are mounted on the balance shaft assembly 2, a leaf spring assembly 4 is arranged between the two rows of straight bolts 3, and leaf spring pressing blocks 5 for fastening the leaf spring assembly 4 are mounted on the tops of the two rows of straight bolts 3.

Referring to fig. 3, the balance shaft assembly 2 is provided with a bump 21 for preventing the head of the bolt from rotating, and the bump 21 prevents the head of the bolt from rotating, so that the regular re-tightening of the straight bolt is facilitated; the bottom of the balance shaft assembly 2 is provided with a jack block 22; the jack block is used as a jack fulcrum position during maintenance to prevent the jack from damaging other positions of the suspension system.

Referring to fig. 4 to 6, the leaf spring assembly 4 includes bolts 42 and a plurality of plate bodies 41, the plate bodies 41 are internally provided with bolt holes, the bolts 42 are installed in the bolt holes, and the top and bottom of each of the bolt holes of the plate bodies 41 are provided with arc-shaped chamfers 43; through setting up the arc chamfer, reduce leaf spring stress concentration, improve leaf spring's fatigue life.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides an adopt straight bolted connection's rear suspension system, includes frame (1), install balance shaft assembly (2) on frame (1), its characterized in that, install two rows of straight bolts (3) on balance shaft assembly (2), be provided with leaf spring assembly (4) between two rows of straight bolts (3), leaf spring briquetting (5) to fasten leaf spring assembly (4) are installed at the top of two rows of straight bolts (3).

2. A rear suspension system employing a straight bolting as claimed in claim 1, wherein said balance shaft assembly (2) is provided with a lug (21) to prevent rotation of the head of the bolt.

3. A rear suspension system employing straight bolting as claimed in claim 1, wherein said leaf spring assembly (4) comprises a bolt (42) and a plurality of plate bodies (41), bolt holes are provided in the plate bodies (41), the bolt (42) is mounted in the bolt holes, and arc-shaped chamfers (43) are provided at the top and bottom of the bolt hole of each plate body (41).

4. A rear suspension system with straight bolting according to claim 1, characterized in that the bottom of said balance shaft assembly (2) is provided with a jack block (22).

5. A rear suspension system adopting straight bolt connection as claimed in claim 1, characterized in that two ends of the plate spring pressing block (5) are connected with a slide plate seat (6), the bottom of the slide plate seat (6) is connected with a rubber support (7), and the lower part of the rubber support is connected with an axle (8).

6. A rear suspension system employing a straight bolting connection according to claim 5, characterized in that a lower thrust rod assembly (9) is connected between the axle (8) and the balance shaft assembly (2), and a V-push assembly (10) is connected between the axle (8) and the frame (1).

7. A rear suspension system adopting straight bolt connection as claimed in claim 1, wherein the frame (1) is provided with a guide plate (11) and limiting blocks (12), and the limiting blocks (12) are positioned on two sides of the leaf spring assembly (4) and are obliquely arranged in a direction approaching the leaf spring assembly (4).