A three-axle semi-trailer suspension structure

Abstract

The present invention discloses a three-axle semi-trailer suspension structure, comprising a front spring bracket, a middle front spring bracket, a middle rear spring bracket, a rear spring bracket, a middle front balancing arm, a middle rear balancing arm, a leaf spring assembly one and a leaf spring assembly two. The front spring bracket, the middle front spring bracket, the middle rear spring bracket and the rear spring bracket are symmetrically welded to the lower end of the frame respectively, the middle front balancing arm is hinged to the middle front spring bracket, and the middle rear balancing arm is hinged to the middle rear spring bracket. One end of a leaf spring assembly is connected to the front spring bracket, and the other end is connected to the middle front spring bracket. Another end of a leaf spring assembly is connected to the middle rear spring bracket, and the other end is connected to the rear spring bracket. The leaf spring assembly two is arranged between the middle front spring bracket and the middle rear spring bracket, and one end is connected to the middle front spring bracket, and the other end is connected to the middle rear spring bracket. The load on each tire is evenly distributed, which solves the problems of tire wear and abnormal braking of the vehicle; reduces the dead weight of the entire vehicle, reduces costs, saves energy and reduces emissions, and has good economic benefits; and has good stability.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicles, and in particular relates to a suspension structure of a three-axle semi-trailer. Background Art

[0002] With the intensification of national regulations on overweight vehicles and load limits, three-axle semi-trailers are generally lightweight. However, the conventional suspension system of a three-axle semi-trailer consists of 12 tires and steel rims, which account for half the weight of the entire vehicle. This results in high weight, high energy consumption, and poor economic efficiency. Furthermore, the suspension structure with 10 tires and steel rims that has emerged on the market suffers from uneven load distribution, leading to problems such as tire wear and abnormal braking. Summary of the Invention

[0003] The present invention provides a three-axle semi-trailer suspension structure to solve the problems existing in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a three-axle semi-trailer suspension structure, including a front spring bracket, a middle front spring bracket, a middle rear spring bracket, a rear spring bracket, a middle front balancing arm, a middle rear balancing arm, a leaf spring assembly one and a leaf spring assembly two, the front spring bracket, the middle front spring bracket, the middle rear spring bracket and the rear spring bracket are symmetrically welded to the lower end of the frame respectively, the middle front balancing arm is hinged to the middle front spring bracket, the middle rear balancing arm is hinged to the middle rear spring bracket, one leaf spring assembly one is arranged between the front spring bracket and the middle front spring bracket, and one end is connected to the front spring bracket, and the other end is connected to the middle front spring bracket, the other leaf spring assembly one is arranged between the middle rear spring bracket and the rear spring bracket, and one end is connected to the middle rear spring bracket, and the other end is connected to the rear spring bracket, the leaf spring assembly two is arranged between the middle front spring bracket and the middle rear spring bracket, and one end is connected to the middle front spring bracket, and the other end is connected to the middle rear spring bracket.

[0005] Preferably, the distance between the front end of the middle front balancing arm and the point of action of the leaf spring assembly 1 and the hinge support point of the middle front balancing arm and the middle front spring bracket is L1; the distance between the rear end of the middle front balancing arm and the point of action of the leaf spring assembly 2 and the hinge support point of the middle front balancing arm and the middle front spring bracket is L2; ​​and L2=2*L1.

[0006] Preferably, the distance between the front end of the middle and rear balancing arm and the point of action of the leaf spring assembly 2 and the hinge support point of the middle and rear balancing arm and the middle and rear spring bracket is LL1; the distance between the rear end of the middle and rear balancing arm and the point of action of the leaf spring assembly 1 and the hinge support point of the middle and rear balancing arm and the middle and rear spring bracket is LL2; and LL1=2*LL2.

[0007] Preferably, the number of leaf springs in the leaf spring assembly one is greater than the number of leaf springs in the leaf spring assembly two.

[0008] Preferably, a three-axle semi-trailer suspension structure also includes a tie rod, the tie rod hinged at the lower end of the front spring bracket is hinged to the rear front axle, the rear front axle is connected to the leaf spring assembly 1 between the front spring bracket and the middle front spring bracket by a U-bolt, the tie rod hinged at the lower end of the middle front spring bracket is hinged to the rear middle axle, the rear middle axle is connected to the leaf spring assembly 2 between the middle front spring bracket and the middle rear spring bracket by a U-bolt, the tie rod hinged at the lower end of the middle rear spring bracket is hinged to the rear rear axle, and the rear rear axle is connected to the leaf spring assembly 1 between the middle rear spring bracket and the rear spring bracket by a U-bolt.

[0009] Preferably, there are two rims on one side of the rear front axle and the rear rear axle, and one rim on the rear middle axle, forming a suspension structure of ten tires and steel rims.

[0010] The beneficial effects of adopting the above technical solution are:

[0011] 1. In the three-axle semi-trailer suspension structure of the present invention, the distance between the front end of the center front balancing arm and the point of action of the leaf spring assembly 1 and the hinge point of the center front balancing arm and the center front spring bracket is L1; the distance between the rear end of the center front balancing arm and the point of action of the leaf spring assembly 2 and the hinge point of the center front balancing arm and the center front spring bracket is L2; ​​and L2 = 2 * L1.

[0012] The distance between the front end of the middle and rear balancing arm and the point of action of the leaf spring assembly 2 and the hinged fulcrum of the middle and rear balancing arm and the middle and rear spring bracket is LL1; the distance between the rear end of the middle and rear balancing arm and the point of action of the leaf spring assembly 1 and the hinged fulcrum of the middle and rear balancing arm and the middle and rear spring bracket is LL2; and LL1=2*LL2.

[0013] The present invention realizes uniform load distribution on each tire of the suspension structure of ten tires and steel rims, thereby solving the problems of tire wear and abnormal braking of vehicles.

[0014] 2. The number of leaf springs in the leaf spring assembly 1 is greater than the number of leaf springs in the leaf spring assembly 2; this reduces the vehicle's dead weight, lowers costs, saves energy, reduces emissions, and has good economic benefits.

[0015] 3. A three-axle semi-trailer suspension structure also includes a tie rod, the tie rod hinged at the lower end of the front spring bracket is hinged to the rear front axle, the rear front axle is connected to the leaf spring assembly 1 between the front spring bracket and the middle front spring bracket by a U-bolt, the tie rod hinged at the lower end of the middle front spring bracket is hinged to the rear middle axle, the rear middle axle is connected to the leaf spring assembly 2 between the middle front spring bracket and the middle rear spring bracket by a U-bolt, the tie rod hinged at the lower end of the middle rear spring bracket is hinged to the rear axle, and the rear rear axle is connected to the leaf spring assembly 1 between the middle rear spring bracket and the rear spring bracket by a U-bolt; this ensures the protection of the drive axle to overload, and also protects the drive axle during starting and braking, thereby ensuring the stability of the entire three-axle semi-trailer suspension structure.

[0016] There are two rims on one side of the rear front axle and the rear rear axle, and one rim on the rear middle axle, forming a suspension structure of ten tires and steel rims; this ensures uniform load distribution on each tire and solves the problems of tire wear and abnormal braking of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an assembly diagram of the three-axle semi-trailer suspension structure of the present invention;

[0018] in:

[0019] 1. Front spring bracket; 2. Center front spring bracket; 3. Center rear spring bracket; 4. Rear spring bracket; 5. Center front balance arm; 6. Center rear balance arm; 7. Leaf spring assembly 1; 8. Leaf spring assembly 2; 9. Tie rod;

[0020] 10, rear front axle; 20, rear middle axle; 30, rear rear axle. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the specific implementation methods of the present invention through the description of embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and to facilitate its implementation.

[0022] like Figure 1 As shown, the present invention is a three-axle semi-trailer suspension structure, in which the load on each tire is evenly distributed, thereby solving the problems of tire wear and abnormal braking of the vehicle; reducing the dead weight of the entire vehicle, lowering costs, saving energy and reducing emissions, and achieving good economic benefits; and ensuring the stability of the entire three-axle semi-trailer suspension structure.

[0023] Specifically, if Figure 1 As shown, a three-axle semi-trailer suspension structure includes a front spring bracket 1, a middle front spring bracket 2, a middle rear spring bracket 3, a rear spring bracket 4, a middle front balancing arm 5, a middle rear balancing arm 6, a leaf spring assembly 1 7 and a leaf spring assembly 2 8. The front spring bracket 1, the middle front spring bracket 2, the middle rear spring bracket 3 and the rear spring bracket 4 are symmetrically welded to the lower end of the frame respectively, the middle front balancing arm 5 is hinged to the middle front spring bracket 2, and the middle rear balancing arm 6 is hinged to the middle rear spring bracket 3. One leaf spring assembly 1 7 is arranged between the front spring bracket 1 and the middle front spring bracket 2, and one end is connected to the front spring bracket 1, and the other end is connected to the middle front spring bracket 2. Another leaf spring assembly 1 7 is arranged between the middle rear spring bracket 3 and the rear spring bracket 4, and one end is connected to the middle rear spring bracket 3, and the other end is connected to the rear spring bracket 4. The leaf spring assembly 2 8 is arranged between the middle front spring bracket 2 and the middle rear spring bracket 3, and one end is connected to the middle front spring bracket 2, and the other end is connected to the middle rear spring bracket 3.

[0024] The distance between the front end of the middle front balancing arm 5 and the point of action of the leaf spring assembly 1 7 and the hinge support point of the middle front balancing arm 5 and the middle front spring bracket 2 is L1; the distance between the rear end of the middle front balancing arm 5 and the point of action of the leaf spring assembly 2 8 and the hinge support point of the middle front balancing arm 5 and the middle front spring bracket 2 is L2; ​​and L2=2*L1.

[0025] The distance between the front end of the middle and rear balancing arm 6 and the point of action of the leaf spring assembly 2 8 and the hinge support point of the middle and rear balancing arm 6 and the middle and rear spring bracket 3 is LL1; the distance between the rear end of the middle and rear balancing arm 6 and the point of action of the leaf spring assembly 1 7 and the hinge support point of the middle and rear balancing arm 6 and the middle and rear spring bracket 3 is LL2; and LL1=2*LL2.

[0026] The number of leaf springs in the leaf spring assembly 1 7 is greater than the number of leaf springs in the leaf spring assembly 2 8 .

[0027] A three-axle semi-trailer suspension structure also includes a tie rod 9, the tie rod 9 hinged at the lower end of the front spring bracket 1 is hinged to the rear front axle 10, and the rear front axle 10 is connected to the leaf spring assembly 7 between the front spring bracket 1 and the middle front spring bracket 2 through a U-bolt, the tie rod 9 hinged at the lower end of the middle front spring bracket 2 is hinged to the rear middle axle 20, and the rear middle axle 20 is connected to the leaf spring assembly 8 between the middle front spring bracket 2 and the middle rear spring bracket 3 through a U-bolt, the tie rod 9 hinged at the lower end of the middle rear spring bracket 3 is hinged to the rear rear axle 30, and the rear rear axle 30 is connected to the leaf spring assembly 7 between the middle rear spring bracket 3 and the rear spring bracket 4 through a U-bolt.

[0028] There are two wheel rims on one side of the rear front axle 10 and the rear rear axle 30, and one wheel rim on the rear middle axle 20, forming a suspension structure of ten tires and steel rims.

[0029] The specific working method is described below with specific embodiments:

[0030] Example 1:

[0031] In the three-axle semi-trailer suspension structure of the present invention, the distance between the front end of the middle front balancing arm 5 and the point of action of the leaf spring assembly 1 7 and the hinge fulcrum of the middle front balancing arm 5 and the middle front spring bracket 2 is L1; the distance between the rear end of the middle front balancing arm 5 and the point of action of the leaf spring assembly 2 8 and the hinge fulcrum of the middle front balancing arm 5 and the middle front spring bracket 2 is L2; ​​and L2=2*L1.

[0032] The distance between the front end of the middle and rear balancing arm 6 and the point of action of the leaf spring assembly 2 8 and the hinge support point of the middle and rear balancing arm 6 and the middle and rear spring bracket 3 is LL1; the distance between the rear end of the middle and rear balancing arm 6 and the point of action of the leaf spring assembly 1 7 and the hinge support point of the middle and rear balancing arm 6 and the middle and rear spring bracket 3 is LL2; and LL1=2*LL2.

[0033] The present invention realizes uniform load distribution on each tire of the suspension structure of ten tires and steel rims, thereby solving the problems of tire wear and abnormal braking of vehicles.

[0034] Example 2:

[0035] On the basis of Example 1, the number of leaf springs in the leaf spring assembly 1 7 is greater than the number of leaf springs in the leaf spring assembly 2 8 ; the vehicle's dead weight is reduced, costs are lowered, energy is saved and emissions are reduced, and economic benefits are good.

[0036] Example 3:

[0037] A three-axle semi-trailer suspension structure also includes a tie rod 9, the tie rod 9 hinged at the lower end of the front spring bracket 1 is hinged to the rear front axle 10, and the rear front axle 10 is connected to the leaf spring assembly 7 between the front spring bracket 1 and the middle front spring bracket 2 through a U-bolt, the tie rod 9 hinged at the lower end of the middle front spring bracket 2 is hinged to the rear middle axle 20, and the rear middle axle 20 is connected to the leaf spring assembly 8 between the middle front spring bracket 2 and the middle rear spring bracket 3 through a U-bolt, the tie rod 9 hinged at the lower end of the middle rear spring bracket 3 is hinged to the rear axle 30, and the rear rear axle 30 is connected to the leaf spring assembly 7 between the middle rear spring bracket 3 and the rear spring bracket 4 through a U-bolt; overload protection of the drive axle is ensured, and it also protects the drive axle during starting and braking, thereby ensuring the stability of the entire three-axle semi-trailer suspension structure.

[0038] There are two rims on one side of the rear front axle 10 and the rear rear axle 30, and one rim on the rear middle axle 20, forming a suspension structure of ten tires and steel rims; this ensures uniform load distribution on each tire and solves the problems of tire wear and abnormal braking of the vehicle.

[0039] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above-mentioned concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A three-axle semi-trailer suspension structure, characterized by: The vehicle frame comprises a front spring bracket (1), a middle front spring bracket (2), a middle rear spring bracket (3), a rear spring bracket (4), a middle front balance arm (5), a middle rear balance arm (6), a leaf spring assembly 1 (7) and a leaf spring assembly 2 (8), wherein the front spring bracket (1), the middle front spring bracket (2), the middle rear spring bracket (3) and the rear spring bracket (4) are symmetrically welded to the lower end of the vehicle frame, the middle front balance arm (5) is hinged to the middle front spring bracket (2), and the middle rear balance arm (6) is hinged to the middle rear spring bracket (3), wherein one leaf spring assembly 1 (7) is arranged between the front spring bracket (1) and the middle front spring bracket (2), and one end is connected to the front spring bracket (1) and the other end is connected to the middle front spring bracket (2), and the other leaf spring assembly The first (7) is provided between the middle rear spring bracket (3) and the rear spring bracket (4), and one end is connected to the middle rear spring bracket (3), and the other end is connected to the rear spring bracket (4); the second leaf spring assembly (8) is provided between the middle front spring bracket (2) and the middle rear spring bracket (3), and one end is connected to the middle front spring bracket (2), and the other end is connected to the middle rear spring bracket (3); the distance between the front end of the middle front balance arm (5) and the point of action of the first leaf spring assembly (7) and the hinge point of the middle front balance arm (5) and the middle front spring bracket (2) is L1; the distance between the rear end of the middle front balance arm (5) and the point of action of the second leaf spring assembly (8) and the hinge point of the middle front balance arm (5) and the middle front spring bracket (2) is L2; ​​and L2=2* L1, the distance between the front end of the middle rear balancing arm (6) and the point of action of the leaf spring assembly 2 (8) and the hinge fulcrum of the middle rear balancing arm (6) and the middle rear spring bracket (3) is LL1; the distance between the rear end of the middle rear balancing arm (6) and the point of action of the leaf spring assembly 1 (7) and the hinge fulcrum of the middle rear balancing arm (6) and the middle rear spring bracket (3) is LL2; and LL1=2*LL2.

2. The three-axle semi-trailer suspension structure according to claim 1, characterized in that: The number of leaf springs in the leaf spring assembly one (7) is greater than the number of leaf springs in the leaf spring assembly two (8).

3. The three-axle semi-trailer suspension structure according to claim 1, characterized in that: The invention also includes a pull rod (9), wherein the pull rod (9) hinged at the lower end of the front spring bracket (1) is hinged to the rear front axle (10), and the rear front axle (10) is connected to the leaf spring assembly (7) between the front spring bracket (1) and the middle front spring bracket (2) through a U-shaped bolt, and the pull rod (9) hinged at the lower end of the middle front spring bracket (2) is hinged to the rear middle axle (20), and the rear middle axle (20) is connected to the leaf spring assembly (8) between the middle front spring bracket (2) and the middle rear spring bracket (3) through a U-shaped bolt, and the pull rod (9) hinged at the lower end of the middle rear spring bracket (3) is hinged to the rear axle (30), and the rear rear axle (30) is connected to the leaf spring assembly (7) between the middle rear spring bracket (3) and the rear spring bracket (4) through a U-shaped bolt.

4. The three-axle semi-trailer suspension structure according to claim 3, characterized in that: The number of wheel rims on one side of the rear front axle (10) and the rear rear axle (30) is two, and the number of wheel rims on the rear middle axle (20) is one, forming a suspension structure of ten tires and steel rims.

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