Air bag suspension structure for semi-trailer

Abstract

The utility model relates to the technical field of airbag suspension components, and discloses an airbag suspension structure of a semi-trailer, comprising a top plate, a bottom plate and an airbag, wherein a restraining platform is installed on the top of the bottom plate, a connecting groove is opened at the end of the restraining platform, a limiting support arm is installed at the bottom of the top plate, and a supporting spring is arranged inside the connecting groove. In the utility model, the restraining platform and the limiting support arm are arranged at the periphery of the airbag, and the top plate and the bottom plate will mutually squeeze and damp the airbag after being subjected to force. At this time, the airbag with deformation overload will contact the restraining platform and the limiting support arm to form restraining protection, and at the same time, the supporting spring will expand and retract as a whole when being squeezed, and support each other by deformation. At this time, the elasticity of the supporting spring can be used to assist the airbag to jointly offset and buffer the pressure transmitted from the vehicle, thereby achieving the effect of auxiliary support and restraint protection for the airbag, avoiding damage, and increasing the service life of the airbag.

Description

Technical Field

[0001] The utility model relates to the technical field of air bag suspension components, in particular to an air bag suspension structure of a semi-trailer. Background Art

[0002] The air suspension system is a configuration of the vehicle suspension. It uses compressed air formed by an air compressor and sent to the airbags of the springs and shock absorbers. The height and hardness of the vehicle can be changed by adjusting the gas pressure. When the existing air bags for trailers are used, the airbags will be frequently squeezed and retracted for shock absorption because the trailer as a whole is heavy after carrying goods. The upper and lower positions of the existing airbags are directly connected to the upper and lower plates of the suspension. There is no protective restraint component on the periphery of the airbags. The airbags are severely deformed when the pressure is overloaded, which makes it easy to tilt to one side. When squeezed for a long time, it is easy to cause the airbags to deform, overload and shift, affecting the service life. For this reason, we propose an air bag suspension structure for semi-trailers. Utility Model Content

[0003] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides an air bag suspension structure for a semitrailer.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an air bag suspension structure of a semi-trailer, including a top plate, a bottom plate and an air bag, the bottom of the bottom plate is provided with a support platform for supporting the bottom plate, the top of the bottom plate is provided with a restraining platform located on the periphery of the air bag, the end of the restraining platform is provided with a connecting groove, the connecting groove is an annular groove, the bottom of the top plate is provided with a limiting arm telescopically connected to the inside of the connecting groove, and the inside of the connecting groove is provided with a supporting spring for supporting the limiting arm.

[0005] Preferably, when the top plate is subjected to air compression shock absorption through the air bag, the limiting support arm moves toward the inside of the connecting groove to compress the support spring.

[0006] Preferably, the support spring has a folded ring structure;

[0007] Furthermore, when the limiting support arm squeezes the support spring, the support spring as a whole is in a telescopic expansion support state.

[0008] Preferably, the inner wall surfaces of the restraining platform and the limiting support arm are both provided with protective pads;

[0009] Furthermore, the protection pad itself has a deformation property, and the protection effect on the airbag can be increased by providing the protection pad.

[0010] Preferably, support sleeves are installed on the corresponding upper and lower sides of the interior of the air bag, and the interiors of the two groups of support sleeves are telescopically connected by a group of inner support rods. Both ends of the inner support rods are engaged with the internal limit-limiting clamping of the support sleeves through limit ends, and the interior of the support sleeve is provided with a connecting spring for supporting the limit end.

[0011] Preferably, the outer sleeve of the inner support rod is provided with a docking spring, and the two ends of the docking spring are respectively connected and matched with the end portions of the two groups of support sleeves;

[0012] Furthermore, when the top plate and the bottom plate press the air bag up and down, the two groups of support sleeves inside the air bag are in a mutually pressed state with the docking springs, and the inner side of the support sleeve is in a pressed state with the limit end through the connecting spring.

[0013] Beneficial Effects

[0014] The utility model provides an air bag suspension structure for a semi-trailer, which has the following beneficial effects:

[0015] (1) An air bag suspension structure of a semi-trailer, in this article, a restraining platform and a limiting arm that are telescopically connected to each other are installed between the top plate and the bottom plate. The restraining platform and the limiting arm are arranged on the periphery of the air bag, and the bottom of the limiting arm is supported and connected with the inside of the restraining platform through a supporting spring. After being subjected to force, the top plate and the bottom plate will squeeze the air bag against each other and use the air pressure inside the air bag to absorb shock. At this time, the air bag with deformation overload will contact the restraining platform and the limiting arm and be restrained and protected by the restraining platform and the limiting arm. When the top plate moves downward toward the bottom plate, the limiting arm at the bottom of the top plate is located inside the restraining platform and moves telescopically and squeezes the supporting spring accordingly. When squeezed, the supporting spring will expand and expand as a whole, and support each other by deformation. At this time, the elasticity of the supporting spring can be used to assist the air bag to jointly offset and buffer the pressure transmitted from the vehicle and at the same time avoid the air bag from being overloaded and deformed and damaged, thereby achieving the effect of auxiliary support and restraint protection for the air bag, avoiding damage, and thus increasing the service life of the air bag.

[0016] (2) The air bag suspension structure of a semi-trailer has support sleeves at the upper and lower positions inside the air bag, and the two groups of support sleeves are connected and matched by an inner support rod. The support sleeves are provided with connecting springs that support and match the limit ends. The two groups of support sleeves are supported and matched by docking springs. In this way, when the air bag is squeezed and buffered, the two groups of support sleeves will be squeezed close to each other under the linkage of the air bag. At this time, elastic support and buffering can be first performed through the docking spring. When the air bag pressure is relatively large, the support sleeve will also perform secondary support and buffering through the interaction between the connecting spring and the limit end when moving, thereby improving the air bag's own buffering capacity and anti-deformation force. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 For this utility model Figure 1 A magnified view of middle;

[0021] Figure 3 It is a partial schematic diagram of the support spring of the utility model;

[0022] Figure 4 For this utility model Figure 1 Enlarged view of B.

[0023] Legend:

[0024] 1. Top plate; 2. Bottom plate; 3. Air bag; 4. Support platform; 5. Inflatable tube; 6. Restraint platform; 7. Connecting groove; 8. Limiting support arm; 9. Support spring; 10. Protection pad; 11. Support sleeve; 12. Inner support rod; 13. Limiting end; 14. Connecting spring; 15. Docking spring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment: An air bag suspension structure of a semi-trailer, such as Figure 1-Figure 4 As shown, it includes a top plate 1, a bottom plate 2 and an air bag 3, and a supporting platform 4 for supporting the bottom plate 2 is provided at the bottom of the bottom plate 2;

[0027] The difference is that a restraining platform 6 is installed on the top of the bottom plate 2, which is located on the periphery of the air bag 3. A connecting groove 7 is opened at the end of the restraining platform 6, and the connecting groove 7 is an annular groove. A limiting arm 8 is installed at the bottom of the top plate 1, which is telescopically connected to the inside of the connecting groove 7. A supporting spring 9 is arranged inside the connecting groove 7 to support and connect the limiting arm 8. A protective pad 10 is arranged on the inner wall surface of the restraining platform 6 and the limiting arm 8. The protective pad 10 itself has a deformation characteristic. Support sleeves 11 are installed on the upper and lower corresponding sides of the interior of the air bag 3. The interior of the two groups of support sleeves 11 is telescopically connected through a group of inner support rods 12. Both ends of the inner support rods 12 are engaged with the internal limiting clamping of the support sleeves 11 through limiting ends 13. A connecting spring 14 is arranged inside the support sleeve 11 to support and connect with the limiting end 13. A docking spring 15 is sleeved on the outside of the inner support rod 12. Both ends of the docking spring 15 are respectively supported and connected with the end portions of the two groups of support sleeves 11.

[0028] Furthermore, when the top plate 1 is subjected to air compression shock absorption through the air bag 3 , the limiting support arm 8 moves toward the inside of the connecting groove 7 to compress the support spring 9 .

[0029] Furthermore, the support spring 9 has a folded ring structure in appearance, and when the limiting support arm 8 squeezes the support spring 9, the support spring 9 as a whole is in a telescopic expansion support state.

[0030] Furthermore, when the top plate 1 and the bottom plate 2 press the air bag 3 up and down, the two groups of support sleeves 11 inside the air bag 3 are in a mutually pressed state with the docking spring 15 , and the inner side of the support sleeve 11 is in a pressed state with the limit end 13 through the connecting spring 14 .

[0031] The working principle of this utility model:

[0032] The restraining platform 6 and the limiting support arm 8 are arranged on the periphery of the air bag 3. After being subjected to force, the top plate 1 and the bottom plate 2 will squeeze the air bag 3 against each other and buffer it through the air pressure inside the air bag 3. At this time, the air bag 3 with overloaded deformation will contact the restraining platform 6 and the limiting support arm 8 and be restrained and protected by the restraining platform 6 and the limiting support arm 8. When the top plate 1 moves downward toward the bottom plate 2, the limiting support arm 8 at the bottom of the top plate 1 is located inside the restraining platform 6 and moves telescopically and squeezes the support spring 9 accordingly. When the support spring 9 is squeezed, it will expand and retract as a whole and support each other by deformation. At this time, the elasticity of the support spring 9 can be used to assist the air bag 3 to jointly offset and buffer the pressure transmitted from the vehicle and at the same time avoid damage caused by overload deformation of the air bag 3, thereby assisting in supporting and restraining the air bag 3 to avoid damage. The two groups of support sleeves 11 inside the air bag 3 can assist in supporting and buffering the air bag 3 through the docking spring 15 and the connecting spring 14, thereby increasing the resistance of the air bag 3 itself.

[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An air bag suspension structure for a semitrailer, comprising a top plate (1), a bottom plate (2) and an air bag (3), characterized in that: The bottom of the bottom plate (2) is provided with a support platform (4) for supporting the bottom plate (2); the top of the bottom plate (2) is provided with a restraining platform (6) located on the periphery of the air bag (3); the end of the restraining platform (6) is provided with a connecting groove (7); the connecting groove (7) is an annular groove; the bottom of the top plate (1) is provided with a limiting arm (8) which is telescopically connected to the inside of the connecting groove (7); the inside of the connecting groove (7) is provided with a supporting spring (9) which supports and connects to the limiting arm (8).

2. The air bag suspension structure of a semitrailer according to claim 1, characterized in that: The inner wall surfaces of the restraining platform (6) and the limiting support arm (8) are both provided with protection pads (10), and the protection pads (10) themselves have deformation characteristics.

3. The air bag suspension structure of a semitrailer according to claim 1, characterized in that: When the top plate (1) performs air compression shock absorption through the air bag (3), the limit support arm (8) moves toward the inside of the connecting groove (7) to compress the support spring (9).

4. The air bag suspension structure of a semitrailer according to claim 3, characterized in that: The support spring (9) has a folded ring structure in appearance, and when the limiting support arm (8) presses the support spring (9), the support spring (9) as a whole is in a telescopic expansion support state.

5. The air bag suspension structure of a semitrailer according to claim 3, characterized in that: Support sleeves (11) are installed on both upper and lower corresponding sides of the interior of the air bag (3); the interiors of the two groups of support sleeves (11) are telescopically connected via a group of inner support rods (12); both ends of the inner support rods (12) are engaged with the inner limit clamping of the support sleeve (11) via limit ends (13); and the interior of the support sleeve (11) is provided with a connecting spring (14) for supporting and connecting the limit ends (13).

6. The air bag suspension structure of a semitrailer according to claim 5, characterized in that: The outer part of the inner support rod (12) is provided with a docking spring (15), and the two ends of the docking spring (15) are respectively supported and connected with the end parts of the two groups of support sleeves (11).

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