Pressure-resistant metal cover plate of air spring

Abstract

The invention provides a pressure-resistant metal cover plate of an air spring, belongs to the technical field of air springs, overcomes the technical defects that an existing cover plate is not pressure-resistant and poor in safety, comprises a body, and is characterized in that the body is in a circular plate shape and is provided with a convex ring with an n-shaped section, and the convex ring protrudes upwards; a downward connecting column is arranged on the body at the central part of the convex ring, a top column is arranged on the body relative to the upper part of the connecting column, a cover cap is arranged on the upper part of the top column, through holes are formed in the cover cap and the top column, a counter bore is formed in the connecting column, an internal thread is arranged in the counter bore, and an external thread is arranged in the counter bore. The product body is provided with the convex ring, the strength is high, the connecting column can be effectively connected with the lower portion of the air spring, and installation and use are convenient; the cap is T-shaped, so that the safety is improved; the anti-static layer on the surface of the product prolongs the service life of the product.

Description

Technical Field

[0001] The invention belongs to the technical field of air springs, and in particular relates to a pressure-resistant metal cover plate of an air spring. Background Art

[0002] In the vibration reduction system of trucks, a combination of air springs and shock absorbers is used. At present, the more common method is that the connecting piece is rod-shaped, and the connecting rod of the shock absorber passes through the connecting piece and exposes the ear structure, and is connected to the cab through the ear structure. This connection method has poor stability and is not suitable for the cab of a long-head truck. Moreover, the air spring needs to be connected to the air pipe, so that there is a distance L between the air spring and the cab, which limits the installation space of the air pipe.

[0003] In Chinese patent literature, there is a patent document with publication number CN 208914918 U, entitled "Airbag cover for air spring". The utility model discloses an airbag cover for air spring, comprising a bottom plate and a top plate, wherein the bottom plate has a first through hole in the middle, and a plurality of first assembly holes are arranged around the first through hole; the top plate has a protrusion in the middle, and the protrusion has a cylindrical hollow part in the middle, a hollow elastic member is attached to the inner wall of the hollow part, and a plurality of second assembly holes corresponding to the first assembly hole are arranged around the protrusion, wherein the inner wall of the elastic member comprises a groove, a metal gasket is embedded in the groove, and the metal gasket is provided with a second through hole coaxial with the first through hole, wherein the surface of the top plate away from the protrusion is attached to the bottom plate, and the first through hole, the second through hole and the hollow part are aligned for the connecting rod of the shock absorber to pass through. The utility model adopts a flat air bag cover plate as a connecting piece between the air spring and the cab, so that a more stable connection between the air spring and the cab can be achieved.

[0004] However, the cover structure in the above patent document is not strong enough, is not pressure-resistant, safety is not guaranteed, and has a short service life. This is a technical problem that we urgently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a pressure-resistant metal cover plate for an air spring to solve the above-mentioned technical problems existing in the prior art.

[0006] According to the above purpose, the technical solution of the present invention is: a pressure-resistant metal cover plate of an air spring, including a main body, characterized in that: the main body is in the shape of a circular plate, the main body is provided with a convex ring with a cross-section in the shape of a "J" and protruding upward, the edge of the main body is provided with a folded edge bent downward, a downward connecting column is provided on the main body at the center of the convex ring, a top column is provided on the main body relative to the upper part of the connecting column, a cover cap is provided on the upper part of the top column, through holes are provided inside the cover cap and the top column, a countersunk hole is provided inside the connecting column, an internal thread is provided in the countersunk hole, and an external thread is provided on the outer circle of the connecting column.

[0007] Furthermore, the cross-section shape of the top column and the cover cap is "T" shaped.

[0008] Furthermore, the upper and lower outer edges of the cap are provided with rounded corners.

[0009] Furthermore, the top of the cap is lower than the upper end surface of the convex ring.

[0010] Furthermore, the top column is perpendicular to the main body and is connected to the main body as a whole by welding, and the welding point is provided with a smooth rounded corner.

[0011] Furthermore, the connecting column is perpendicular to the body, and a chamfer is provided on the outer circle of the lower end of the connecting column.

[0012] Furthermore, the inner side of the convex ring is connected to the inner body through a slope surface.

[0013] Furthermore, the corners of the upper and lower sides of the slope surface are provided with rounded corners.

[0014] Furthermore, the bottom of the inner body of the convex ring is higher than the bottom surface of the outer body.

[0015] The pressure-resistant metal cover plate of the air spring is formed by extending the main body through stamping and stretching of the material, and an electrostatic protection layer is provided on the surface.

[0016] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0017] 1. The product body of the present invention is provided with a convex ring protruding upward, which has high strength, simple manufacturing process and low cost;

[0018] 2. The product of the present invention is provided with a downward connecting column and an upward top column, which can be effectively connected with the lower part of the air spring, and is easy to install and use;

[0019] 3. The cross-section shape of the top column and the cap of the product of the present invention is "T" shaped, which will not slip when taking and placing, thus improving the safety of installation and use;

[0020] 4. The surface of the product of the present invention is coated with an anti-static layer or a rust-proof layer, which can prevent static electricity or rust, and improve the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structural schematic diagram of the product of the present invention;

[0022] Figure 2 is a front structural schematic diagram of the product of the present invention;

[0023] Figure 3 is a top structural schematic diagram of the product of the present invention;

[0024] Figure 4 is a bottom structural schematic diagram of the product of the present invention;

[0025] Figure 5 is Figure 3 the A-A cross-sectional structural schematic diagram of

[0026] In the figure: 1. Body; 2. Convex ring; 3. Flange; 4. Connecting column; 5. Top column; 6. Cap; 7. Through hole; 8. Fillet; 9. Counterbore; 10. Internal thread; 11. External thread; 12. Chamfer; 13. Sloping surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Combined with Figure 1-Figure 5 , is a schematic diagram of the principle structure of an embodiment of a pressure-resistant metal cover plate of an air spring according to the present invention. The pressure-resistant metal cover plate of the air spring includes a body 1. The body 1 is in the shape of a circular plate and is adapted to the shape of the upper opening of the lower housing of the air spring. A convex ring 2 with a "J" - shaped cross-section protruding upward is provided on the body 1. A flange 3 that bends downward is provided at the edge of the body 1, which can be connected with a lower connecting part by buckling and limiting. To improve the strength of the bending, R corners formed by the bending of the material itself are provided at the inner and outer corners of the flange 3. A downward connecting column 4 is provided on the body 1 at the overall central part of the convex ring 2. The connecting column 4 is perpendicular to the body 1. A top column 5 is provided on the body 1 above the connecting column 4. The top column 5 is perpendicular to the body 1 and is connected to the body 1 by welding as a whole. A smooth fillet 8 is provided at the welding position. A cap 6 is provided on the upper part of the top column 5. In order to stably place the upper part of the cover plate on the operating table, the top of the cap 6 is lower than the upper end surface of the convex ring 2, and at the same time, the collision and deformation of the cap 6 are reduced. Through holes 7 are provided inside the cap 6 and the top column 5. A counterbore 9 is provided inside the connecting column 4. An internal thread 10 is provided in the counterbore 9 to facilitate the connection with a stud inserted from below. External threads 11 are provided on the outer circle of the connecting column 4 to facilitate the screwing and fastening of the metal cover plate and the lower connecting part with a nut. At the same time, to facilitate the screwing of the thread and the nut and reduce the generation of burrs, a chamfer 12 is provided on the outer circle at the lower end of the connecting column 4.

[0028] Preferably, the cross-section shape of the top column 5 and the cover cap 6 is "T"-shaped, and it is not easy to slide down when picked up. In order to prevent the cover cap 6 from hurting the operator, rounded corners 8 are provided on the upper and lower outer edges of the cover cap 6.

[0029] Preferably, in order to improve the toughness of the convex ring 2, the inner side of the convex ring 2 is connected to the internal body 1 through a slope surface 13. In order to improve the strength and rigidity and reduce the difficulty of processing, the upper and lower corners of the slope surface 13 are provided with rounded corners 8. In order to prevent the upper and lower elastic deformation of the body 1 from affecting the lower parts, specifically, the bottom of the inner body 1 of the convex ring 2 is higher than the bottom surface of the outer body 1.

[0030] The pressure-resistant metal cover plate of the above-mentioned air spring, the main body 1 is extended by stamping and stretching of the material, and an electrostatic protection layer is provided on the surface, which can not only prevent the generation of static electricity, but also prevent rust, effectively protect the product, and increase the service life of the product.

[0031] During manufacturing, the connecting column 4, the top column 5 and the cover cap 6 are manufactured in advance by mechanical processing. In order to improve the verticality and stability of the installation connection, the top column 5 and the cover cap 6 can be added into a part. Matching columns and matching holes can be set between the connecting column 4 and the top column 5 and the cover cap 6, or the cover cap 6, the top column 5 and the connecting column can be processed into a connected part; then the steel plate for making the main body 1 is stamped and drawn in a prefabricated mold to form a convex ring 2 and a main body 1 in the middle of the convex ring 2. The middle of the main body 1 can be punched and processed into a hole that matches the connecting column 4. When the top column 5 and the connecting column 4 are separate parts, the connecting column 4 is extended upward from the lower part of the inner hole of the stamped main body 1. Pay attention to the connection The outer circle step surface of the column 4 is seamlessly combined with the lower plane of the middle body 1, and then the top column 5 is inserted into the matching surface of the connecting column 4 from the upper part of the body 1, and then the cap 6 and the two ends of the connecting column 4 are pressed with tooling to keep the top column 5 and the connecting column 4 perpendicular to the body 1, and weld them into one on the welding equipment; if the connecting column 4, the top column 5 and the cap 6 are an integrated part, insert the integrated part from the upper part of the middle inner hole of the body 1, note that the outer circle of the top column 5 should be larger than the outer circle of the connecting column 4, and a step surface should be set on the top column 5, which is seamlessly combined with the upper plane of the body 1, and the outer circle of the connecting column 4 is slidably matched with the inner hole of the body 1, and then the step surface is welded to the body 1 as a whole with a welding machine.

[0032] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0033] Although the following terms are frequently used in this article: 1. body; 2. convex ring; 3. folded edge; 4. connecting column; 5. top column; 6. cap; 7. through hole; 8. fillet; 9. countersunk hole; 10. internal thread; 11. external thread; 12. chamfer; 13. ramp surface, etc., the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

[0034] The pressure-resistant metal cover plate of the air spring provided by the present invention is introduced above. In the introduction, specific preferred embodiments are used to illustrate the principles and implementation methods of the present invention. These embodiments are only used to help understand the principles and core ideas of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the design ideas of the present invention, the implementation plans in the above embodiments can be further combined or replaced, and the present invention can be improved and modified in several ways. These improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A pressure-resistant metal cover plate of an air spring, comprising a body (1), characterized in that: The body (1) is in the shape of a circular plate. A convex ring (2) with a "Ji"-shaped upward convex cross-section is provided on the body (1). A folded edge (3) that bends downward is provided at the edge of the body (1). A downward connecting column (4) is provided on the body (1) at the central part of the convex ring (2). A top column (5) is provided on the body (1) above the connecting column (4). A cap (6) is provided on the upper part of the top column (5). Through holes (7) are provided inside the cap (6) and the top column (5). A counterbore (9) is provided inside the connecting column (4). Internal threads (10) are provided in the counterbore (9). External threads (11) are provided on the outer circle of the connecting column (4).

2. The pressure-resistant metal cover plate of the air spring according to claim 1, characterized in that: The cross-sectional shapes of the top column (5) and the cap (6) are in the shape of a "T".

3. The pressure-resistant metal cover plate of the air spring according to claim 2, characterized in that: Round corners (8) are provided on the upper and lower outer edges of the cap (6).

4. The pressure-resistant metal cover plate of the air spring according to claim 2, characterized in that: The top of the cap (6) is lower than the upper end face of the convex ring (2).

5. The pressure-resistant metal cover plate of the air spring according to claim 2, characterized in that: The top column (5) is perpendicular to the body (1) and is connected to the body (1) as a whole by welding. Smooth round corners (8) are provided at the welding position.

6. The pressure-resistant metal cover plate of the air spring according to claim 1, characterized in that: The connecting column (4) is perpendicular to the body (1). A chamfer (12) is provided on the outer circle at the lower end of the connecting column (4).

7. The pressure-resistant metal cover plate of the air spring according to claim 1, characterized in that: The inner side of the convex ring (2) is connected to the inner body (1) through a slope surface (13).

8. The pressure-resistant metal cover plate of the air spring according to claim 7, characterized in that: Round corners (8) are provided at the corners on the upper and lower sides of the slope surface (13).

9. The pressure-resistant metal cover plate of the air spring according to claim 7, characterized in that: The bottom of the inner body (1) of the convex ring (2) is higher than the bottom surface of the outer peripheral body (1).

10. The pressure-resistant metal cover plate of the air spring according to any one of claims 1 to 9, characterized in that: The body (1) is formed by stamping and stretching of the material, and an electrostatic protection layer is provided on the surface.

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