Air suspension of semitrailer

Abstract

The utility model belongs to the technical field of air suspensions, and particularly relates to a semitrailer air suspension which comprises a rear axle, a fixing frame and fixing hoops, the two ends of the rear axle are fixed on the fixing frame through the fixing hoops, the end portions of the fixing frame are movably connected with fixing bases, air bags are fixed on the upper surfaces of the fixing bases, and the air bags are fixed on the fixing bases. A fixed top plate is fixed to the surface of the top of the air bag, a cage type protective cover is detachably installed on the outer side of the air bag, fixed columns are arranged on the surface of the cage type protective cover and distributed at equal intervals, and lifting columns are movably inserted into inner cavities of the fixed columns. Gravel particles jumping from the road surface can be blocked through the cage type protective cover, the jumping gravels are prevented from impacting the air bag, protection on the air bag can be improved, the air bag is prevented from being damaged after being impacted, meanwhile, rubber protective wax liquid can be smeared on the surface of the air bag through a cotton ring, the air bag can be protected, and the service life of the air bag is prolonged. The air bag is prevented from being eroded and aged by light, oxygen, ozone and oil, and the service life of the air bag can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of air suspensions, in particular to an air suspension for a semitrailer. Background Art

[0002] Air suspension is a shock absorber that relies on a powerful air pump to inflate each air chamber. In order to improve the smoothness of the vehicle, reduce fuel consumption and reduce tire wear, many semi-trailers use a liftable air suspension structure to lift the first axle or the first and second axles when the vehicle is unloaded.

[0003] The invention patent with the current patent publication number CN209616827U discloses an air suspension for a semi-trailer. During the use of the air bag suspension, the air bag suspension often drives the axle and the guide rod to move up and down. During the movement of the axle, dust in the air is adsorbed on the surface of the guide rod, and the guide rod enters the interior of the air bag suspension. The dust accumulates at the connection between the air bag suspension and the guide rod along with the guide rod, which is inconvenient for the movement of the guide rod. By setting the spring guide arm as a single-piece structure and a left air spring, and the lifting upper cross beam and the lifting lower support beam as a hollow structure, the weight of the entire semi-trailer air suspension is reduced, thereby ensuring that the tractor has good smoothness and handling stability.

[0004] When the existing semi-trailer air suspension is in use, the airbag is exposed under the semi-trailer body. During driving, the wheels will pick up gravel on the road. When the gravel hits the airbag, the airbag will be damaged by the impact force of the gravel. At the same time, the airbag is easily corroded and aged by light, oxygen, ozone, oil, etc., which affects the service life of the airbag. In order to solve the above problems, a semi-trailer air suspension is proposed in the present application. Utility Model Content

[0005] (I) Purpose of the utility model

[0006] In order to solve the technical problems existing in the background technology, the utility model proposes an air suspension for a semi-trailer, which can block the sand and gravel particles bouncing up from the road surface through a cage-type protective cover to prevent the bouncing sand and gravel from hitting the airbag, thereby improving the protection of the airbag and preventing the airbag from being damaged after the collision. At the same time, the cotton ring can apply rubber protective wax liquid on the surface of the airbag, which can protect the airbag and prevent the airbag from being corroded and aged by light, oxygen, ozone and oil, thereby extending the service life of the airbag to solve the problems raised in the background technology.

[0007] (II) Technical solution

[0008] In order to solve the above technical problems, the utility model provides an air suspension for a semi-trailer, comprising a rear axle, a fixing frame and a fixing hoop, wherein both ends of the rear axle are fixed to the fixing frame through the fixing hoop, both ends of the fixing frame are movably connected to a fixing base, an air bag is fixed on the upper surface of the fixing base, and a fixed top plate is fixed on the top surface of the air bag;

[0009] A cage-type protective cover is detachably mounted on the outside of the airbag, and fixing columns are arranged on the surface of the cage-type protective cover. The fixing columns are equidistantly distributed, and lifting columns are movably inserted into the inner cavities of the fixing columns.

[0010] The movable sleeve on the surface of the air bag is provided with a cotton ring.

[0011] Preferably, threaded connection seats are welded to the upper surface of the fixed base and the lower surface of the fixed top plate, and the top and bottom of the cage-type protective cover are respectively threadedly connected to the threaded connection seats.

[0012] Preferably, the inner wall of the fixing column is provided with guide grooves, and the guide grooves are symmetrically distributed.

[0013] Preferably, guide seats are integrally formed on the two side surfaces of the lifting column at positions corresponding to the guide grooves, and the guide seats are slidably connected to the guide grooves.

[0014] Preferably, a circular mounting ring is welded on the top of the inner wall of the fixing column, an embedding groove is opened on the inner wall of the circular mounting ring, and the cotton ring is embedded in the embedding groove.

[0015] Preferably, a liquid storage tank is welded to the top of the outer wall of the fixing column, and the bottom of the side wall of the liquid storage tank is conductively connected to the circular mounting ring through a connecting pipe.

[0016] Preferably, an air injection nozzle is provided on the lower surface of the fixed base, the air injection nozzle is connected to the airbag, and a connecting seat is welded on the upper surface of the fixed top plate.

[0017] The above technical solution of the utility model has the following beneficial technical effects:

[0018] 1. The utility model provides a cage-type protective cover on the outside of the airbag, which can block the sand and gravel particles bouncing up from the road surface to prevent the bouncing sand and gravel from hitting the airbag, thereby improving the protection of the airbag and preventing the airbag from being damaged after the collision. The lifting column is plugged into the fixed column, and the guide seat and the guide groove are matched to guide the lifting of the lifting column, so that the cage-type protective cover can be adjusted according to the expansion size of the airbag.

[0019] 2. In the utility model, the rubber protective wax liquid is injected into the circular mounting ring through the connecting tube, and the rubber protective wax liquid is absorbed by the cotton ring. When the airbag contracts and expands, the cotton ring can apply the rubber protective wax liquid on the surface of the airbag, which can protect the airbag and prevent the airbag from being corroded and aged by light, oxygen, ozone and oil, thereby extending the service life of the airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of an air suspension for a semi-trailer of the utility model;

[0021] Figure 2 This is a schematic diagram of a rear axle fixing structure of a semitrailer air suspension according to the utility model;

[0022] Figure 3 This is a schematic diagram of an airbag protection structure of an air suspension for a semitrailer according to the utility model;

[0023] Figure 4 The utility model is a schematic diagram of a circular mounting ring structure of a semitrailer air suspension.

[0024] Reference numerals:

[0025] 1. Rear axle; 2. Fixed frame; 3. Fixed hoop; 4. Fixed base; 5. Airbag; 6. Fixed top plate; 7. Threaded connection seat; 8. Cage-type protective cover; 9. Fixed column; 10. Lifting column; 11. Guide seat; 12. Guide groove; 13. Round mounting ring; 14. Cotton ring; 15. Liquid storage tank; 16. Air injection nozzle. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0027] like Figure 1-4 As shown, the utility model proposes an air suspension for a semitrailer, comprising a rear axle 1, a fixing frame 2 and a fixing hoop 3, wherein both ends of the rear axle 1 are fixed to the fixing frame 2 through the fixing hoop 3, and both ends of the fixing frame 2 are movably connected to a fixing base 4, an air bag 5 is fixed on the upper surface of the fixing base 4, and a fixed top plate 6 is fixed on the top surface of the air bag 5;

[0028] A cage-type protective cover 8 is detachably mounted on the outside of the airbag 5 , and fixing columns 9 are arranged on the surface of the cage-type protective cover 8 . The fixing columns 9 are equidistantly distributed, and lifting columns 10 are movably inserted into the inner cavities of the fixing columns 9 .

[0029] It should be noted that the fixing frame 2 is fixed to the bottom of the semi-trailer, the rear axle 1 is fixed to the fixing frame 2 by a fixing hoop 3, the bottom of the airbag 5 is movably connected to the end of the fixing frame 2 by a fixing base 4, the top of the airbag 5 is movably connected to the fixing position of the bottom of the semi-trailer through a connecting seat on the surface of the fixed top plate 6, the air injection nozzle 16 is connected to the air supply pipeline, and the airbag 5 can be inflated through the air injection nozzle 16, a cage-type protective cover 8 is provided between the fixed top plate 6 and the fixed base 4, and the top and bottom of the cage-type protective cover 8 are respectively threadedly connected to the threaded connection seat 7 for fixing, the cage-type protective cover 8 can block the sand and gravel particles bouncing up from the road surface to prevent the bouncing sand and gravel from hitting the airbag 5, and can enhance the protection of the airbag 5 to prevent the airbag 5 from being damaged after the collision, the lifting column 10 is plugged into the fixed column 9, and the guide seat 11 and the guide groove 12 can be matched to guide the lifting and lowering of the lifting column 10, so that the cage-type protective cover 8 can be adjusted according to the expansion size of the airbag 5.

[0030] In this embodiment, if Figure 3 As shown, the upper surface of the fixed base 4 and the lower surface of the fixed top plate 6 are both welded with threaded connection seats 7, and the top and bottom of the cage-type protective cover 8 are respectively threadedly connected to the threaded connection seats 7.

[0031] It should be noted that the top and bottom of the cage-type protective cover 8 are respectively threadedly connected to the threaded connection seat 7 to achieve rapid disassembly and assembly of the cage-type protective cover 8 .

[0032] In this embodiment, if Figure 1 and Figure 3 As shown, the inner wall of the fixing column 9 is provided with guide grooves 12 which are symmetrically distributed. Guide seats 11 are integrally formed on the two side surfaces of the lifting column 10 at positions corresponding to the guide grooves 12 , and the guide seats 11 are slidably connected to the guide grooves 12 .

[0033] It should be noted that the guide seat 11 and the guide groove 12 can be matched to guide the lifting and lowering of the lifting column 10 .

[0034] In this embodiment, if Figure 3 and Figure 4 As shown, a cotton ring 14 is movably sleeved on the surface of the airbag 5, a circular mounting ring 13 is welded to the top of the inner wall of the fixing column 9, an embedding groove is opened on the inner wall of the circular mounting ring 13, and the cotton ring 14 is embedded in the embedding groove, a liquid storage tank 15 is welded to the top of the outer wall of the fixing column 9, and the bottom of the side wall of the liquid storage tank 15 is conductively connected to the circular mounting ring 13 through a connecting pipe.

[0035] It should be noted that the cotton ring 14 is fixed by an embedded groove on the inner wall of the circular mounting ring 13. The cotton ring 14 is shrinkable, so that the inner wall of the cotton ring 14 can abut against the surface of the airbag 5. The liquid storage tank 15 is filled with rubber protective wax liquid, which is injected into the circular mounting ring 13 through a connecting pipe and absorbed by the cotton ring 14. When the airbag 5 shrinks and expands, the cotton ring 14 can apply the rubber protective wax liquid on the surface of the airbag 5, which can protect the airbag 5 and prevent the airbag 5 from being corroded and aged by light, oxygen, ozone, and oil, thereby extending the service life of the airbag 5.

[0036] In this embodiment, if Figure 1 As shown, a gas injection nozzle 16 is provided on the lower surface of the fixed base 4 , and the gas injection nozzle 16 is connected to the airbag 5 , and a connecting seat is welded on the upper surface of the fixed top plate 6 .

[0037] It should be noted that the top of the airbag 5 is movably connected to a fixed position at the bottom of the semi-trailer compartment via a connecting seat on the surface of the fixed top plate 6 , and the air injection nozzle 16 is connected to the air supply pipeline, and the airbag 5 can be inflated through the air injection nozzle 16 .

[0038] The working principle and use process of the utility model are as follows: the fixing frame 2 is fixed to the bottom of the semi-trailer, the rear axle 1 is fixed to the fixing frame 2 through the fixing hoop 3, the bottom of the airbag 5 is movably connected to the end of the fixing frame 2 through the fixing base 4, the top of the airbag 5 is movably connected to the fixing position of the bottom of the semi-trailer through the connecting seat on the surface of the fixed top plate 6, the air injection nozzle 16 is connected to the air supply pipeline, the airbag 5 can be inflated through the air injection nozzle 16, a cage-type protective cover 8 is provided between the fixed top plate 6 and the fixed base 4, the top and bottom of the cage-type protective cover 8 are respectively threadedly connected to the threaded connection seat 7 for fixing, the cage-type protective cover 8, the cage-type protective cover 8 can block the sand and gravel particles bouncing up from the road surface to prevent the bouncing sand and gravel from hitting the airbag 5, and can enhance the protection of the airbag 5 to prevent the airbag 5 from being damaged after the collision. The lifting column 10 is plugged into the fixed column 9, and the guide seat 11 and the guide groove 12 are matched to guide the lifting and lowering of the lifting column 10, so that the cage-type protective cover 8 can be adjusted according to the expansion size of the airbag 5. The cotton ring 14 is fixed by the embedded groove on the inner wall of the circular mounting ring 13. The cotton ring 14 is shrinkable, so that the inner wall of the cotton ring 14 can abut against the surface of the airbag 5. The liquid storage tank 15 is filled with rubber protective wax liquid, and the rubber protective wax liquid is injected into the circular mounting ring 13 through the connecting pipe, and the rubber protective wax liquid is absorbed by the cotton ring 14. When the airbag 5 shrinks and expands, the cotton ring 14 can apply the rubber protective wax liquid on the surface of the airbag 5, which can protect the airbag 5 and prevent the airbag 5 from being corroded and aged by light, oxygen, ozone, and oil, thereby extending the service life of the airbag 5.

[0039] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims or the equivalent forms of such scope and boundaries.

Claims

1. A semitrailer air suspension, comprising a rear axle (1), a fixing frame (2) and a fixing hoop (3), wherein both ends of the rear axle (1) are fixed to the fixing frame (2) via the fixing hoop (3), and characterized in that: The ends of the fixing frame (2) are movably connected to a fixing base (4), an air bag (5) is fixed to the upper surface of the fixing base (4), and a fixing top plate (6) is fixed to the top surface of the air bag (5); A cage-type protective cover (8) is detachably mounted on the outside of the airbag (5), and a fixing column (9) is arranged on the surface of the cage-type protective cover (8). The fixing columns (9) are equidistantly distributed, and the inner cavities of the fixing columns (9) are all movably plugged with lifting columns (10); The surface of the air bag (5) is movably covered with a cotton ring (14).

2. The semitrailer air suspension according to claim 1, characterized in that: The upper surface of the fixed base (4) and the lower surface of the fixed top plate (6) are both welded with threaded connection seats (7), and the top and bottom of the cage-type protective cover (8) are respectively threadedly connected to the threaded connection seats (7).

3. The semitrailer air suspension according to claim 2, characterized in that: The inner wall of the fixing column (9) is provided with guide grooves (12), and the guide grooves (12) are symmetrically distributed.

4. The semitrailer air suspension according to claim 3, characterized in that: Guide seats (11) are integrally formed at positions corresponding to the guide grooves (12) on both side surfaces of the lifting column (10), and the guide seats (11) are slidably connected to the guide grooves (12).

5. The semitrailer air suspension according to claim 1, characterized in that: A circular mounting ring (13) is welded to the top of the inner wall of the fixing column (9), an embedding groove is provided on the inner wall of the circular mounting ring (13), and the cotton ring (14) is embedded in the embedding groove.

6. The semitrailer air suspension according to claim 5, characterized in that: A liquid storage tank (15) is welded to the top of the outer wall of the fixing column (9), and the bottom of the side wall of the liquid storage tank (15) is conductively connected to the circular mounting ring (13) through a connecting pipe.

7. The semitrailer air suspension according to claim 6, characterized in that: The lower surface of the fixed base (4) is provided with an air injection nozzle (16), the air injection nozzle (16) is connected to the air bag (5), and the upper surface of the fixed top plate (6) is welded with a connecting seat.

Images