Vulcanization sealing plate for membrane type air spring

Abstract

The utility model discloses a vulcanization sealing plate for a membrane type air spring, which comprises a buffer block and a sealing plate main body, the buffer block is vulcanized on one side of the sealing plate main body, and a connecting piece used for being connected with a piston base is arranged on the other side, corresponding to the buffer block, of the sealing plate main body. The vulcanization sealing plate structure is arranged on the buffer block to serve as a support, it can be guaranteed that an enough safety gap exists between the rolling plate assembly and the piston base, the rolling plate assembly cannot make contact with the air bag to be abraded, and therefore the reliability and the service life of the air spring are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile suspension, in particular to a vulcanized sealing plate for a membrane type air spring. Background Art

[0002] Air springs are key components of automobile air suspension systems. Compared with conventional suspensions, air suspensions can extend the service life of vehicles, improve the comfort of the entire vehicle, reduce the dynamic load on the wheels, and greatly reduce the degree of damage caused by vehicles to the road surface, thereby reducing the maintenance costs of highway roads. They can also adjust the height of special and specialized vehicles such as airport shuttles and city buses as needed.

[0003] However, due to the poor road conditions in China and the common phenomenon of commercial vehicle overloading, the air spring's buffer limit structure will be involved when driving on roads with poor road conditions or when the vehicle height needs to be adjusted to the minimum state. The air springs that use the foreign all-rubber buffer block structure have shown signs of acclimatization. The buffer block has been severely deformed due to long-term operation, which eventually leads to damage to the air spring bag skin, premature failure, and a short service life. Utility Model Content

[0004] The purpose of the utility model is to provide a vulcanized sealing plate for a membrane type air spring. The utility model can ensure that there is a sufficient safety gap between the roll plate assembly and the piston base by arranging a vulcanized sealing plate structure as a support on the buffer block, and will not cause the roll plate assembly to contact and wear the airbag, thereby ensuring the reliability and service life of the air spring.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a vulcanized sealing plate for a membrane type air spring, comprising a buffer block and a sealing plate body, wherein the buffer block is vulcanized on one side of the sealing plate body, and a connecting piece for connecting to a piston base is provided on the other side of the sealing plate body corresponding to the buffer block.

[0006] By adopting the above technical solution, due to the use of a vulcanized sealing plate structure, even if the buffer block is deformed, the sealing plate body serves as a support to ensure that there is sufficient safety clearance between the roll plate assembly and the piston base, and the roll plate assembly will not contact and wear the airbag, thereby ensuring the reliability and service life of the air spring.

[0007] The utility model is further configured that the buffer block and the sealing plate body are coaxially arranged in a truncated cone shape, and the outer circumferential surface of the buffer block is smoothly connected with the outer circumferential surface of the sealing plate body.

[0008] By adopting the above technical solution, its bending strength can be improved, thereby increasing its service life.

[0009] The utility model is further configured that an arc transition portion is provided at an upper edge of the sealing plate body, and an edge at a bottom end of the buffer block is covered on a surface of the arc transition portion.

[0010] By adopting the above technical solution, the contact area of ​​the edge connection parts of the two is increased, thereby improving the connection strength between the two and improving the stability of the structure.

[0011] The utility model is further configured such that the upper surface of the buffer block is in an arc shape with a middle portion being high and a periphery being gradually lower.

[0012] By adopting the above technical solution, the flexibility of the buffer block when in contact with the rolling plate assembly can be improved.

[0013] The utility model is further configured that an annular support flange extending toward the outer periphery for abutting against the piston base is provided at the outer edge of the bottom end of the sealing plate body, and the annular support flange is parallel to the horizontal plane.

[0014] By adopting the above technical solution, the contact area between the sealing plate body and the piston base is increased, and the contact surface is flat, which is beneficial to improving the stability of the cooperation between the sealing plate and the piston base, and can also prevent the piston base from being subjected to large local stress, thereby protecting the components.

[0015] The utility model is further configured that the outer edge of the annular support flange is also provided with a clamping flange for clamping the bottom end of the airbag onto the piston base, and the cross section of the clamping flange is in an "inverted L" shape.

[0016] By adopting the above technical solution, the bottom edge of the airbag can be positioned and fixed, thereby improving the firmness of the airbag connection.

[0017] The utility model is further configured such that the connecting piece includes a connecting rod segment and a screw segment coaxially arranged on the connecting rod segment for cooperating with the nut, the upper end of the connecting rod segment is connected to the sealing plate body, the diameter of the screw segment is smaller than the diameter of the connecting rod segment, so that a supporting step for supporting the upper end of the piston base is formed between the two.

[0018] By adopting the above technical solution, a nut can be threaded on the screw section, and the piston base is sleeved on the outside of the connecting rod section. By tightening the connecting nut, the piston base is pressed against the supporting step to achieve the connection between the connecting piece and the piston base. The connection structure is simple and reliable, and disassembly and assembly are very convenient.

[0019] The utility model is further configured that the connecting rod section of the connecting piece is connected to the sealing plate body by welding.

[0020] By adopting the above technical solution, the connection strength is high and the service life is long.

[0021] The utility model is further configured that a positioning convex portion is provided at the upper end of the sealing plate body, and a positioning concave portion matching with the positioning convex portion is provided on the sealing plate body.

[0022] By adopting the above technical solution, not only is it convenient for early positioning and installation, but it can also improve the firmness of the connection structure between the sealing plate body and the connecting piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the air spring in the initial state;

[0025] Figure 3 It is a schematic diagram of the structure when the air spring is at minimum height.

[0026] In the figure: 1. Rolling plate assembly; 2. Vulcanized sealing plate; 21. Buffer block; 22. Sealing plate body; 221. Arc transition portion; 222. Annular supporting flange; 223. Pressing flange; 224. Positioning protrusion; 23. Connecting piece; 231. Connecting rod section; 232. Screw section; 233. Support step; 234. Positioning recess; 3. Airbag; 4. Piston base; 5. Nut. DETAILED DESCRIPTION

[0027] 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.

[0028] Example: As attached Figures 1 to 3 The vulcanized sealing plate for a membrane air spring shown in the figure comprises a buffer block 21 and a sealing plate body 22, wherein the buffer block 21 is vulcanized on one side of the sealing plate body 22, and a connecting piece 23 for connecting with a piston base 4 is provided on the sealing plate body 22 corresponding to the other side of the buffer block 21. Due to the use of the vulcanized sealing plate 2 structure, even if the buffer block 21 is deformed, the sealing plate body 22 is used as a support to ensure that there is a sufficient safety gap between the coil assembly 1 and the piston base 4, and the coil assembly 1 will not be in contact with the airbag 3 and will not be worn, thereby ensuring the reliability and service life of the air spring.

[0029] As attached Figure 1As shown, the buffer block 21 and the sealing plate body 22 are coaxially arranged in a truncated cone shape, and the outer circumference of the buffer block 21 is smoothly connected with the outer circumference of the sealing plate body 22. This design can improve its bending strength, thereby increasing its service life.

[0030] As attached Figure 1 As shown, the upper edge of the sealing plate body 22 is provided with an arc transition portion 221, and the bottom edge of the buffer block 21 is covered on the surface of the arc transition portion 221. This design can increase the contact area of ​​the edge connection between the two, thereby increasing the connection strength between the two and improving the stability of the structure.

[0031] As attached Figure 1 As shown, the upper surface of the buffer block 21 is in an arc shape with a high middle and a gradually lower periphery. This design can improve the flexibility of the buffer block 21 when in contact with the plate rolling assembly 1.

[0032] As attached Figure 1 and attached Figure 2 As shown, the outer edge of the bottom end of the sealing plate body 22 is provided with an annular support flange 222 extending toward the periphery for abutting against the piston base 4, and the annular support flange 222 is parallel to the horizontal plane. The contact area between the sealing plate body 22 and the piston base 4 is increased, and the contact surface is flat and closely fits the upper surface of the piston base 4, which is conducive to improving the stability of the sealing plate and the piston base 4, and can also prevent the piston base 4 from being subjected to large local stress, thereby protecting the parts.

[0033] As attached Figure 1 and attached Figure 2 As shown, the outer edge of the annular support flange 222 is also provided with a clamping flange 223 for clamping the bottom end of the airbag 3 onto the piston base 4, and the cross section of the clamping flange 223 is in an "inverted L" shape. This design can position and fix the bottom edge of the airbag 3, and improve the firmness of the connection of the airbag 3. Among them, the sealing plate body 22, the annular support flange 222 and the clamping flange 223 are an integrated structure.

[0034] As attached Figure 1 and attached Figure 2As shown, the connecting member 23 includes a connecting rod section 231 and a screw section 232 coaxially arranged on the connecting rod section 231 for cooperating with the nut 5. The connecting rod section 231 and the screw section 232 are an integrated structure. The upper end of the connecting rod section 231 is connected to the sealing plate body 22. The diameter of the screw section 232 is smaller than the diameter of the connecting rod section 231, so that a supporting step 233 for supporting the upper end of the piston base 4 is formed between the two. The nut 5 can be threadedly connected to the screw section 232, and the piston base 4 is sleeved on the outside of the connecting rod section 231. By tightening the connecting nut 5, the piston base 4 is pressed against the supporting step 233 to achieve the connection between the connecting member 23 and the piston base 4. The connection structure is simple and reliable, and it is very convenient to disassemble and assemble.

[0035] The connecting rod section 231 of the connecting member 23 is connected to the sealing plate body 22 by welding. This design has high connection strength and long service life.

[0036] As attached Figure 1 As shown, a positioning protrusion 224 is provided at the upper end of the sealing plate body 22, and a positioning recess 234 is provided on the sealing plate body 22 to match the positioning protrusion 224. In this embodiment, the cross section of the positioning protrusion 224 is circular, and the positioning recess 234 is a through hole provided at the center of the sealing plate body 22. This design is not only convenient for early positioning and installation, but also can improve the firmness of the connection structure between the sealing plate body 22 and the connecting member 23.

[0037] Working principle: Please refer to the attached Figure 2 and attached Figure 3 As shown, when a vehicle with air suspension is traveling on a road with poor road conditions and the axle reaches the upper jump limit or the vehicle body height needs to be adjusted to the minimum state, the air spring will be in the minimum height state, the vulcanized sealing plate 2 will touch the rolling plate assembly 1, and the weight of the vehicle body supported by the air spring will be transmitted to the vulcanized sealing plate 2 through the rolling plate assembly 1. The buffer block 21 in the vulcanized sealing plate 2 is deformed by the force, but with the sealing plate body 22 as support, it can ensure that there is a sufficient safety gap between the rolling plate assembly 1 and the piston base 4, and the rolling plate assembly 1 will not contact and wear with the airbag 3, thereby ensuring the reliability and service life of the air spring.

Claims

1. A vulcanized sealing plate for a membrane type air spring, characterized in that: It comprises a buffer block (21) and a sealing plate body (22), wherein the buffer block (21) is vulcanized on one side of the sealing plate body (22), and a connecting piece (23) for connecting to a piston base (4) is provided on the other side of the sealing plate body (22) corresponding to the buffer block (21).

2. A vulcanized sealing plate for a membrane type air spring according to claim 1, characterized in that: The buffer block (21) and the sealing plate body (22) are coaxially arranged in a truncated cone shape, and the outer peripheral surface of the buffer block (21) and the outer peripheral surface of the sealing plate body (22) are smoothly connected together.

3. A vulcanized sealing plate for a membrane type air spring according to claim 1, characterized in that: The upper edge of the sealing plate body (22) is provided with an arc transition portion (221), and the bottom edge of the buffer block (21) is coated on the surface of the arc transition portion (221).

4. A vulcanized sealing plate for a membrane type air spring according to claim 1, characterized in that: The upper surface of the buffer block (21) is in an arc shape that is high in the middle and gradually becomes lower at the periphery.

5. The vulcanized sealing plate for a membrane type air spring according to claim 1, characterized in that: An annular support flange (222) extending outwardly for abutting against the piston base (4) is provided at the outer edge of the bottom end of the sealing plate body (22), and the annular support flange (222) is parallel to the horizontal plane.

6. A vulcanized sealing plate for a membrane type air spring according to claim 5, characterized in that: The outer edge of the annular support flange (222) is also provided with a clamping flange (223) for clamping the bottom end of the airbag (3) onto the piston base (4), and the cross-section of the clamping flange (223) is in the shape of an "inverted L".

7. A vulcanized sealing plate for a membrane type air spring according to claim 1, characterized in that: The connecting member (23) comprises a connecting rod section (231) and a screw section (232) coaxially arranged on the connecting rod section (231) for cooperating with the nut (5); the upper end of the connecting rod section (231) is connected to the sealing plate body (22); the diameter of the screw section (232) is smaller than the diameter of the connecting rod section (231), so that a supporting step (233) for supporting the upper end of the piston base (4) is formed between the two.

8. A vulcanized sealing plate for a membrane type air spring according to claim 7, characterized in that: The connecting rod section (231) of the connecting piece (23) is connected to the sealing plate body (22) by welding.

9. A vulcanized sealing plate for a membrane type air spring according to claim 8, characterized in that: A positioning convex portion (224) is provided at the upper end of the sealing plate body (22), and a positioning concave portion (234) which fits with the positioning convex portion (224) is provided on the sealing plate body (22).

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