Single cylinder shock absorber assembly tool

Abstract

The utility model provides a single cylinder shock absorber assembly tool belongs to single cylinder shock absorber assembly equipment field, including the casing, the casing one end has the article groove, is used for placing the floating piston in the article groove, is connected with the first sealing element on the floating piston, and the sealing ring first sealing element is used for the sealed setting of the gap between the sealing ring article groove inboard wall and sealing ring floating piston, the other end of sealing ring casing is equipped with the connecting groove, and the cylinder body end inserts sealing ring connecting groove, and the inboard wall on sealing ring connecting groove is connected with the second sealing element, and the sealing ring second sealing element is used for the sealed setting of the gap between sealing ring cylinder body outer surface and sealing ring connecting groove inboard wall, the air inlet is set up on sealing ring casing, and sealing ring air inlet and sealing ring connecting groove or with sealing ring article groove intercommunication setting, and sealing ring air inlet is located between sealing ring first sealing element and sealing ring second sealing element.

Description

Technical Field

[0001] This utility model relates to the field of monotube vibration damper assembly equipment, and specifically to a monotube vibration damper assembly fixture. Background Technology

[0002] In the automotive industry, shock absorbers play a crucial role in improving vehicle ride comfort, handling stability, and safety. Currently, automotive shock absorbers are mainly divided into two structures: monotube shock absorbers and twin-tube shock absorbers. Monotube shock absorbers use a floating piston assembly to separate oil and high-pressure gas, achieving oil-gas separation.

[0003] However, the assembly process of a monotube shock absorber requires the injection of high-pressure gas into the cylinder block while ensuring effective oil-gas isolation. This places extremely high demands on the inflation operation. Current production processes require the use of specialized large-scale production equipment to complete the inflation, oil injection, and sealing processes in one go. This necessitates a significant initial investment for companies to purchase this specialized equipment. The high equipment costs significantly raise the production threshold for monotube shock absorbers, making it unaffordable for many companies. Therefore, despite the performance and cost advantages of monotube shock absorbers, most vehicle models in China ultimately do not choose them due to production costs and equipment investment considerations, which limits their widespread adoption and application in the market. Utility Model Content

[0004] In view of this, the present invention provides a single-tube shock absorber assembly fixture, which can be connected to the cylinder body by connecting the assembly fixture and the connecting groove inside the housing, placing the floating piston into the placement groove, sealing the upper and lower ends of the housing with the first and second sealing elements, inflating the housing through the air inlet, and after inflation, compressing the gas by pressing down the floating piston and moving the floating joint into the cylinder body.

[0005] To solve the above technical problems, this utility model provides a single-tube shock absorber assembly fixture, including a housing, one end of which has a storage groove for placing a floating piston. A first sealing element is connected to the floating piston, and the first sealing element is used to seal the gap between the inner wall of the storage groove and the floating piston.

[0006] The other end of the housing is provided with a connecting groove, and the end of the cylinder is inserted into the connecting groove. A second sealing element is connected to the inner side wall of the connecting groove. The second sealing element is used to seal the gap between the outer surface of the cylinder and the inner side wall of the connecting groove.

[0007] An air inlet is provided on the housing, and the air inlet is connected to the connecting groove or the storage groove. The air inlet is located between the first sealing element and the second sealing element.

[0008] The storage slot and the connecting slot are concentrically designed.

[0009] The shell is cylindrical in shape, and a storage slot and a connecting slot are formed inside the shell. The storage slot and the connecting slot are arranged adjacent to each other. The connecting slot is used to place the end of the cylinder. The outer side wall of the cylinder abuts against the inner side wall of the connecting slot. The storage slot is used to place the floating piston. The outer surface of the floating piston abuts against the inner side wall of the storage slot.

[0010] A first seal is connected to the floating piston. The first seal is located between the floating piston and the inner wall of the storage groove. It is used to fill the gap between the floating piston and the inner wall of the storage groove to prevent the gas from moving upward and overflowing from the gap between the floating piston and the inner wall of the storage groove when the gas is injected, so that the gas cannot be compressed and the oil-gas balance cannot be achieved. The distance between the inner wall of the connecting groove and the inner wall of the storage groove is the wall thickness of the cylinder.

[0011] A second seal is connected to the inner wall of the connecting groove. The second seal is located between the connecting groove and the outer wall of the cylinder body. It is used to fill the gap between the connecting groove and the outer wall of the cylinder body to prevent the gas from moving downward and overflowing from the gap between the connecting groove and the outer wall of the cylinder body when the gas is injected, so that the gas cannot be compressed and the oil-gas balance cannot be achieved.

[0012] An air inlet is provided on the housing. The air inlet is located above the second seal and below the first seal. When it is located below the first seal, the end of the floating piston must be flush with the end of the storage groove. The air inlet is connected to the connecting groove or the storage groove. When gas is filled into the housing through the air inlet, the first seal and the second seal will seal the gas in the housing to prevent it from escaping. The remaining gas enters the housing through the gap between the connecting groove above the second seal and the outer wall of the cylinder, and the gas escaping upward is blocked by the first seal.

[0013] Both the first and second seals are O-rings, which seal and intercept the gas injected into the housing to prevent gas from escaping.

[0014] After gas is injected into the housing, the hydraulic press located above the cylinder is started. The hydraulic press first presses the housing onto the cylinder and places the piston rod above the floating piston. The piston rod is positioned on top of the floating piston to prevent the gas from pushing the floating piston out of the housing when gas is injected into the cylinder, causing the gas to escape and become uncompressible. After the gas is injected, the hydraulic press is started. The output end of the hydraulic press presses the piston rod downward, pressing the floating piston into the cylinder. At the same time, the gas is compressed below the floating piston. After the piston rod is pressed down to the shortest leakage length, shock absorber oil is injected into the cylinder so that the shock absorber oil is above the floating piston. Finally, the guide is installed at the end of the cylinder, and a retaining ring and a sealing ring are installed on the guide to seal the cylinder, completing the assembly of the single-bar shock absorber.

[0015] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0016] 1. Reduced Equipment Costs: This tooling changes the traditional assembly process of monotube vibration dampers, which requires specialized large-scale production equipment to complete the inflation, oiling, and sealing processes in one go. Using this tooling, companies do not need to invest heavily in specialized equipment, reducing the initial equipment costs for monotube vibration damper production. This significantly lowers the production threshold and facilitates the promotion and application of monotube vibration dampers in the market.

[0017] 2. Achieving effective sealing: A first seal is installed between the floating piston and the storage groove, and a second seal is installed between the connecting groove and the cylinder body. Both seals are O-rings, which effectively fill the gaps. During inflation, this prevents gas from escaping from the gaps between the floating piston and the inner wall of the storage groove, and between the connecting groove and the outer wall of the cylinder body, ensuring that the gas is effectively compressed, achieving oil-gas balance, and guaranteeing the normal operation of the shock absorber.

[0018] 3. Simplified assembly process: The tooling structure is rationally designed. During operation, the floating piston is first inflated and then pressed down, followed by oil injection and installation of the guide and sealing components to complete the assembly. Compared with traditional processes, the process is simpler, easier to operate, and improves production efficiency.

[0019] 4. Easy to connect and operate: The overall shape of the shell is cylindrical, which is compatible with the shape of the cylinder and makes the connection more convenient; the storage slot and the connecting slot are concentrically set. When the connecting slot is connected to the end of the cylinder, the inner wall of the storage slot and the inner wall of the cylinder are on the same straight line, which makes it easy to push the floating piston into the cylinder; the inclined surfaces at both ends of the shell also facilitate the operation to a certain extent. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of a single-tube vibration damper assembly fixture according to the present invention;

[0021] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the right-side structure of this utility model.

[0023] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Storage slot; 3. Connecting slot; 4. First seal; 5. Second seal; 6. Air inlet; 7. Inclined surface. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figures 1-3The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0025] like Figure 1 , 3 As shown:

[0026] This embodiment provides a single-tube shock absorber assembly fixture, including a housing 1. The housing 1 is cylindrical in shape to match the shape of the cylinder body, making the connection more convenient. A floating piston is placed inside the housing 1, and the housing 1 is concentric with the cylinder body. Seals are connected to both ends of the housing 1, and an air inlet 6 is opened between the seals. After gas is injected into the housing 1 through the air inlet 6, the floating piston inside the housing 1 is guided into the cylinder body by a hydraulic press and other pressure holding components. Because the seals at both ends of the housing 1 can prevent the gas inside the housing 1 from escaping, when the floating piston is guided into the cylinder body, the floating piston can compress the gas injected into the housing 1 into the cylinder body at the bottom of the floating piston, thus completing the injection of gas into the cylinder body.

[0027] like Figure 1 , 2 As shown in Figure 3: The housing 1 has a storage groove 2 and a connecting groove 3 inside, arranged adjacent to each other. The connecting groove 3 is used to place the end of the cylinder body, with the outer wall of the cylinder body in close contact with the inner wall of the connecting groove 3. The storage groove 2 is used to place the floating piston, with the outer surface of the floating piston also in contact with the inner wall of the storage groove 2. The diameter of the connecting groove 3 is larger than the diameter of the storage groove 2, and the distance between the inner wall of the connecting groove 3 and the inner wall of the storage groove 2 is equal to the wall thickness of the cylinder body. This ensures that when the end of the cylinder body is placed into the connecting groove 3, the outer surface of the cylinder body fits snugly against the inner wall of the connecting groove 3, and the inner surface of the cylinder body has the same diameter as the inner wall of the storage groove 2, facilitating the pushing of the floating piston from the housing 1 into the cylinder body.

[0028] like Figure 2 , 3As shown: A groove surrounds the floating piston, and a first seal 4 is connected within the groove. The groove serves to limit the connection of the first seal 4. The first seal 4 is located between the floating piston and the inner wall of the storage groove 2. Its key function is to fill the gap between the two. During gas injection, it effectively prevents gas from moving upward and overflowing from the gap. Once the gas overflows, it cannot be compressed, thus failing to achieve oil-gas balance and affecting the normal operation of the shock absorber. Similarly, a groove also surrounds the inner wall of the connecting groove 3, and a second seal 5 is connected within the groove. It is located between the connecting groove 3 and the outer wall of the cylinder body, and is used to fill the gap between the two to prevent gas from moving downward and overflowing from the gap during injection, thus avoiding the situation where the gas cannot be compressed and oil-gas balance cannot be achieved.

[0029] like Figure 1 , 2 As shown: An air inlet 6 is provided on the housing 1, located above the second seal 5 and below the first seal 4. The air inlet 6 communicates with the connecting groove 3 or the storage groove 2. When gas is injected into the housing 1, the first seal 4 and the second seal 5 work together to seal the gas inside the housing 1, preventing gas escape. When gas is injected into the housing 1 through the air inlet 6, the injected gas enters the housing 1 through the gap between the connecting groove 3 above the second seal 5 and the outer wall of the cylinder. Any upward-escaping gas is also blocked again by the first seal 4, completing the gas injection. Both the first seal 4 and the second seal 5 are O-rings, which, with their excellent sealing performance, effectively intercept the gas injected into the housing 1, ensuring that the gas does not escape.

[0030] like Figure 1 , 2 As shown in Figure 3, the assembly process of the single-bar shock absorber is as follows: After gas is injected into housing 1, the hydraulic press located above the cylinder is started first. The hydraulic press first firmly holds housing 1 on the cylinder, and then places the piston rod above the floating piston, with the other end of the piston rod in contact with the output end of the hydraulic press. The piston rod rests on the floating piston to prevent the gas from pushing the floating piston out of housing 1 during gas injection, causing the gas to escape and become uncompressible. After the gas injection is completed, the hydraulic press is started again, and the output end of the hydraulic press presses the piston rod downward. During this process, the floating piston is gradually pressed down into the cylinder, and at the same time, the gas is compressed below the floating piston. Then, shock absorber oil is injected into the cylinder, so that the shock absorber oil is above the floating piston, completing the gas injection and separating the oil and gas. A guide is connected to the end of the piston rod, and the piston rod slides on the guide. The guide is installed at the end of the cylinder body. The inner side wall of the cylinder body end has multiple slots. A retaining ring and a sealing ring are installed on the guide, so that the retaining ring and the sealing ring on the guide are located in the slots to seal the inside of the cylinder body.

[0031] Working principle: First, insert the end of the cylinder into the connecting groove 3 of the tooling housing 1. The second seal 5 on the inner wall of the connecting groove 3 seals the gap between the outer surface of the cylinder and the inner wall of the connecting groove 3 to prevent gas leakage. Next, place the floating piston with the first seal 4 in the storage groove 2. The first seal 4 seals the gap between the inner wall of the storage groove 2 and the floating piston. The air inlet 6 on the tooling housing 1 communicates with the connecting groove 3 or the storage groove 2 and is located between the first seal 4 and the second seal 5. Gas is introduced through the air inlet 6 and sealed inside the housing 1. Then, start the hydraulic press above the cylinder to press the tooling housing 1 onto the cylinder. Place the piston rod above the floating piston to prevent it from being pushed out during inflation. After inflation is complete, start the hydraulic press again to press the floating piston down into the cylinder through the piston rod, compressing the gas below the floating piston. Next, damper oil is injected into the cylinder body, so that the oil is above the floating piston. Finally, guides, retaining rings and sealing rings are installed at the end of the cylinder body to seal it, thus completing the assembly of the monotube damper.

[0032] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A single-tube vibration damper assembly fixture, characterized in that: Includes a housing (1), one end of which has a storage groove (2), the storage groove (2) is used to place a floating piston, and a first sealing member (4) is connected to the floating piston. The first sealing member (4) is used to seal the gap between the inner wall of the storage groove (2) and the floating piston. The other end of the housing (1) is provided with a connecting groove (3), and the cylinder end is inserted into the connecting groove (3). A second sealing element (5) is connected to the inner side wall of the connecting groove (3). The second sealing element (5) is used to seal the gap between the outer surface of the cylinder and the inner side wall of the connecting groove (3). An air inlet (6) is provided on the housing (1). The air inlet (6) is connected to the connecting groove (3) or the storage groove (2). The air inlet (6) is located between the first sealing member (4) and the second sealing member (5). The storage slot (2) and the connecting slot (3) are concentrically arranged.

2. The assembly fixture for a single-tube vibration damper as described in claim 1, characterized in that: The shell (1) is cylindrical in shape.

3. The assembly fixture for a single-tube vibration damper as described in claim 2, characterized in that: Both the first sealing element (4) and the second sealing element (5) are O-rings.

4. The assembly fixture for a single-tube vibration damper as described in claim 3, characterized in that: The diameter of the storage groove (2) is smaller than the diameter of the connecting groove (3), and the distance between the inner wall of the connecting groove (3) and the inner wall of the storage groove (2) is the wall thickness of the cylinder.

5. The assembly fixture for a single-tube vibration damper as described in claim 4, characterized in that: When the connecting groove (3) is connected to the end of the cylinder, the inner wall of the storage groove (2) is in the same straight line as the inner wall of the cylinder, which makes it easier to push the floating piston into the cylinder.

6. The assembly fixture for a single-tube vibration damper as described in claim 5, characterized in that: Inclined surfaces (7) are formed at both ends of the shell (1).

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