Semitrailer composite suspension

Abstract

The utility model discloses a kind of semitrailer composite suspensions, it is related to automobile parts technical field, including suspension main body, the suspension main body bottom is provided with leaf spring suspension assembly, the suspension main body bottom one side is provided with air suspension assembly, the leaf spring suspension assembly includes installation frame, and the installation frame top is detachably installed with the suspension main body bottom.The utility model of a kind of semitrailer composite suspensions, by the air suspension assembly cooperation leaf spring suspension assembly of being set up, suspension main body is buffered and damped by composite structure, air suspension assembly cooperation leaf spring suspension assembly improves the shock-absorbing capacity of while effectively protecting leaf spring suspension assembly, prolongs the service life of leaf spring suspension assembly, also by the fixing piece and first support sheet and second support sheet of being set up form triangle on second fixed sleeve support second connecting piece, increase the stress area of suspension main body bottom, connecting leaf spring and fixed leaf spring stress more evenly, install more firmly.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a composite suspension for semi-trailers. Background Technology

[0002] An automobile is a non-rail-borne vehicle with four or more wheels. It is composed of various automotive parts. Among them, the suspension system is the general term for all force-transmitting connection devices between the vehicle frame and the axle or wheels. Its function is to transmit the forces and torques acting between the wheels and the frame, and to buffer the impact forces transmitted from uneven road surfaces to the frame or body, and to dampen the resulting vibrations, so as to ensure that the vehicle can drive smoothly. There are many types of automobiles. A semi-trailer is a trailer with its axle located behind the vehicle's center of gravity and equipped with a coupling device that can transmit horizontal and vertical forces to the tractor. Semi-trailers are also equipped with suspension for shock absorption.

[0003] However, existing semi-trailer suspensions mostly use leaf springs for shock absorption, which has a simple shock absorption structure. Furthermore, existing semi-trailer suspensions using leaf springs are prone to damage and breakage when carrying cargo on uneven roads due to frequent impacts. In order to overcome the shortcomings of existing technologies, we propose a composite suspension for semi-trailers. Utility Model Content

[0004] The main objective of this invention is to provide a composite suspension for semi-trailers that can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A semi-trailer composite suspension includes a suspension body, a leaf spring suspension assembly at the bottom of the suspension body, and an air suspension assembly on one side of the bottom of the suspension body. The leaf spring suspension assembly includes a mounting frame, the top of which is detachably mounted to the bottom of the suspension body. A connecting shaft extends through one side of the mounting frame, and a connecting leaf spring is slidably connected to the outer side of the connecting shaft. A fixed leaf spring is detachably mounted at the bottom of the connecting leaf spring, a first fixing sleeve is detachably mounted on the outer side of the connecting leaf spring, and a second fixing sleeve is detachably mounted at the center of the connecting leaf spring. The air suspension assembly includes a shock absorber airbag, a first connecting piece is detachably mounted at the top of the shock absorber airbag, the top of which is detachably mounted to the bottom of the suspension body. A second connecting piece is detachably mounted at the bottom of the shock absorber airbag, a fixing piece is detachably mounted on one side of the bottom of the second connecting piece, and a first support piece is detachably mounted at the bottom of the fixing piece.

[0006] Preferably, one side of the first support piece and one side of the second fixing sleeve are detachably installed, and a second support piece is detachably installed on the other side of the first support piece. The top of the second support piece and one side of the bottom of the fixing piece are detachably installed.

[0007] Preferably, the top of the leaf spring suspension assembly is located at one-third to one-half of the bottom of the air suspension assembly.

[0008] Preferably, the connecting shaft has symmetrically formed grooves on its outer side, and a limiting block is slidably connected inside the grooves of the connecting shaft. One end of the connecting shaft is threaded with a lead screw, and the outer side of the lead screw abuts against the inner side of the limiting block.

[0009] Preferably, the fixed leaf spring is composed of multiple leaf springs arranged in descending order, the outer side of the fixed leaf spring is detachably installed inside the first fixed sleeve, and the center of the outer side of the fixed leaf spring is detachably installed inside the second fixed sleeve.

[0010] Preferably, the top of the second fixing sleeve and the bottom side of the second connecting piece are detachably installed.

[0011] Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: 1. In this utility model, the air suspension assembly and the leaf spring suspension assembly form a composite structure to buffer and dampen the main suspension body. At the same time, when the leaf spring suspension assembly is subjected to impact force and retracts, the air suspension assembly acts as a buffer and damper for the leaf spring suspension assembly, preventing the leaf spring suspension assembly from being damaged and broken due to frequent impact force. The air suspension assembly and the leaf spring suspension assembly improve the shock absorption capacity while effectively protecting the leaf spring suspension assembly and extending the service life of the leaf spring suspension assembly.

[0012] 2. In this utility model, the fixed plate, the first support plate and the second support plate form a triangle to support the second connecting plate on the second fixed sleeve, thereby increasing the force-bearing area at the bottom of the suspension body, making the force on the connecting leaf spring and the fixed leaf spring more uniform, and making the shock-absorbing airbag more firmly installed between the suspension body and the second fixed sleeve. As a result, the air suspension assembly is more firmly installed, and the air suspension assembly is more stable when subjected to force between the suspension body and the leaf spring suspension assembly, thus enhancing stability and improving the buffering effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model; Figure 3 This is a schematic diagram of the disassembled structure of the leaf spring suspension assembly of this utility model; Figure 4 This is a schematic diagram of the disassembled structure of the air suspension component of this utility model.

[0014] In the diagram: 1. Suspension body; 2. Leaf spring suspension assembly; 3. Air suspension assembly; 4. Mounting frame; 5. Connecting shaft; 6. Connecting leaf spring; 7. Fixed leaf spring; 8. First fixing sleeve; 9. Second fixing sleeve; 10. Shock absorber airbag; 11. First connecting piece; 12. Second connecting piece; 13. Fixing piece; 14. First support piece; 15. Second support piece; 16. Limiting block; 17. Lead screw. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] like Figures 1-3 As shown, a semi-trailer composite suspension includes a suspension body 1, a leaf spring suspension assembly 2 at the bottom of the suspension body 1, and an air suspension assembly 3 on one side of the bottom of the suspension body 1. The leaf spring suspension assembly 2 includes a mounting frame 4, and is connected to the suspension body 1 through the mounting frame 4. The fixed leaf springs 7 inside the leaf spring suspension assembly 2 are composed of multiple sets of leaf springs arranged in descending order. When the suspension body 1 applies pressure to the connecting leaf spring 6 by driving the connecting shaft 5 through the mounting frame 4, the connecting leaf spring 6 drives the bottom fixed leaf spring 7 through the first fixing sleeve 8 and the second fixing sleeve 9 to perform buffering and shock absorption. The multiple sets of fixed leaf springs 7 arranged in descending order cooperate with the connecting leaf spring 6 to buffer the suspension body. 1. For shock absorption and cushioning, the top of the leaf spring suspension assembly 2 is located at one-third to one-half of the bottom of the air suspension assembly 3. When the leaf spring suspension assembly 2 absorbs shocks and cushions the suspension body 1, the air suspension assembly 3 works with the leaf spring suspension assembly 2 to form a composite structure to cushion and absorb shocks to the suspension body 1. At the same time, when the leaf spring suspension assembly 2 is subjected to impact force and recoils, the air suspension assembly 3 acts as a cushion and shock absorber for the leaf spring suspension assembly 2, preventing the leaf spring suspension assembly 2 from being damaged and broken due to frequent impact forces. The air suspension assembly 3 works with the leaf spring suspension assembly 2 to improve the shock absorption capacity while effectively protecting the leaf spring suspension assembly 2 and extending the service life of the leaf spring suspension assembly 2.

[0017] like Figures 2-4As shown, the air suspension assembly 3 includes a shock-absorbing airbag 10. A first connecting piece 11 is detachably mounted on the top of the shock-absorbing airbag 10. When the suspension body 1 presses down on the first connecting piece 11, driving the shock-absorbing airbag 10, the shock-absorbing airbag 10 drives the second connecting piece 12, which in turn drives the fixing piece 13. The fixing piece 13, the first support piece 14, and the second support piece 15 form a triangle, which drives the second fixing sleeve 9. Thus, when the shock-absorbing airbag 10 presses down, it drives the second connecting piece 12, the fixing piece 13, and the second fixing sleeve 9 to press down on the connecting leaf spring 6 and the fixing leaf spring 7, increasing the force-bearing area at the bottom of the suspension body 1. The connecting leaf spring 6 and the fixing leaf spring 7 are subjected to more even force. The fixing piece 13, the first support piece 14, and the second support piece 15 form a triangle, which supports the second connecting piece 12 on the second fixing sleeve 9. The shock-absorbing airbag 10 is more firmly installed between the suspension body 1 and the second fixing sleeve 9, thus making the air suspension assembly 3 more firmly installed. The air suspension assembly 3 is more stable when subjected to force between the suspension body 1 and the leaf spring suspension assembly 2, enhancing stability and improving the cushioning effect.

[0018] Working principle It should be noted that this utility model is a semi-trailer composite suspension. In use, firstly, the shock absorber airbag 10 is installed to the bottom of the suspension body 1 via the first connecting piece 11. Then, the fixing piece 13 is installed to the bottom of the shock absorber airbag 10 via the second connecting piece 12. The fixing piece 13 drives the first support piece 14 and the second support piece 15. Next, the connecting leaf spring 6 is installed into the mounting frame 4. The connecting shaft 5 passes through the connecting leaf spring 6, and the screw rod 17 is turned into the connecting shaft 5. The screw rod 17 abuts against the limiting block 16 and is inserted into the mounting frame 4, thereby using the limiting block 16 to connect the airbag 10 to the suspension body 10. The connecting shaft 5 is limited on the mounting frame 4, and the fixed connecting leaf spring 6 is fixed on the mounting frame 4. The connecting leaf spring 6 is installed at the bottom of the suspension body 1 through the mounting frame 4. Then, one side of the second fixing sleeve 9 installed on the outside of the connecting leaf spring 6 is installed and connected to the first support plate 14, thereby establishing a connection between the air suspension assembly 3 and the leaf spring suspension assembly 2. At this time, the top of the connecting leaf spring 6 is located at one-third to one-half of the bottom of the shock-absorbing airbag 10. Thus, the leaf spring suspension assembly 2 and the air suspension assembly 3 work together to serve as shock absorbers for the suspension body 1, thereby improving the shock absorption capacity.

[0019] When the suspension body 1 applies pressure to the connecting shaft 5 via the mounting frame 4, the connecting leaf spring 6, through the first fixing sleeve 8 and the second fixing sleeve 9, drives the bottom fixing leaf spring 7 for buffering and shock absorption. Simultaneously, the suspension body 1 presses down on the mounting frame 4, which in turn presses down on the first connecting piece 11, driving the shock absorber 10. The shock absorber 10 then drives the second connecting piece 12, which in turn drives the fixing piece 13. The fixing piece 13, together with the first support piece 14 and the second support piece 15, forms a triangle that drives the second fixing sleeve 9. Thus, when the shock absorber 10 presses down, it drives the second connecting piece 12, which in turn drives the fixing piece 13. The second fixed sleeve 9 presses down on the connecting leaf spring 6 and the fixed leaf spring 7, increasing the force-bearing area at the bottom of the suspension body 1. The connecting leaf spring 6 and the fixed leaf spring 7 are subjected to more even force. The shock-absorbing airbag 10 simultaneously shares the impact force on the connecting leaf spring 6 and the fixed leaf spring 7. When the connecting leaf spring 6 and the fixed leaf spring 7 retract, the shock-absorbing airbag 10 acts as a buffer between the suspension body 1 and the connecting leaf spring 6 and the fixed leaf spring 7, preventing the connecting leaf spring 6 and the fixed leaf spring 7 from being damaged or broken due to frequent excessive impact force. This improves the shock absorption capacity while effectively protecting the connecting leaf spring 6 and the fixed leaf spring 7.

[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A composite suspension for a semi-trailer, comprising a suspension body (1), characterized in that: The suspension body (1) is provided with a leaf spring suspension assembly (2) at its bottom, and an air suspension assembly (3) is provided on one side of the bottom of the suspension body (1). The leaf spring suspension assembly (2) includes a mounting frame (4). The top of the mounting frame (4) is detachably mounted to the bottom of the suspension body (1). A connecting shaft (5) is movably passed through one side of the mounting frame (4). A connecting leaf spring (6) is slidably connected to the outside of the connecting shaft (5). A fixing leaf spring (7) is detachably mounted at the bottom of the connecting leaf spring (6). A first fixing sleeve (8) is detachably mounted on the outside of the connecting leaf spring (6). The connecting leaf spring (6) is detachably fitted with a second fixing sleeve (9) at its center. The air suspension assembly (3) includes a shock-absorbing airbag (10). The top of the shock-absorbing airbag (10) is detachably fitted with a first connecting piece (11). The top of the first connecting piece (11) is detachably fitted with the bottom of the suspension body (1). The bottom of the shock-absorbing airbag (10) is detachably fitted with a second connecting piece (12). The bottom side of the second connecting piece (12) is detachably fitted with a fixing piece (13). The bottom of the fixing piece (13) is detachably fitted with a first support piece (14).

2. A semi-trailer composite suspension according to claim 1, characterized in that: The first support plate (14) is detachably installed on one side and the second fixing sleeve (9) on one side. The second support plate (15) is detachably installed on the other side of the first support plate (14). The top of the second support plate (15) is detachably installed on the bottom side of the fixing plate (13).

3. A semi-trailer composite suspension according to claim 1, characterized in that: The top of the leaf spring suspension assembly (2) is located at one-third to one-half of the bottom of the air suspension assembly (3).

4. A semi-trailer composite suspension according to claim 1, characterized in that: The connecting shaft (5) has symmetrical grooves on its outer side. A limiting block (16) is slidably connected inside the groove of the connecting shaft (5). A lead screw (17) is threaded to one end of the connecting shaft (5). The outer side of the lead screw (17) abuts against the inner side of the limiting block (16).

5. A composite suspension for a semi-trailer according to claim 1, characterized in that: The fixed leaf spring (7) is composed of multiple leaf springs arranged in descending order. The outer side of the fixed leaf spring (7) is detachably installed inside the first fixed sleeve (8), and the center of the outer side of the fixed leaf spring (7) is detachably installed inside the second fixed sleeve (9).

6. A semi-trailer composite suspension according to claim 1, characterized in that: The top of the second fixing sleeve (9) and the bottom side of the second connecting piece (12) can be detachably installed.

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