Stretching damping shock absorber

Abstract

The utility model discloses a tensile damping shock absorber, and belongs to a shock absorption device in the field of automobile part production. By arranging the shell on the periphery of the compression spring, the piston and the piston rod are protected and prevented from dust, and the service life of the piston and the piston rod is prolonged; by arranging the damping mechanism, the O-shaped ring moves upwards during compression, a gap is formed between the O-shaped ring and the damping gasket, hydraulic oil flows to the end of the piston rod through the gap, and resistance cannot be generated; during stretching, the O-shaped ring descends, a gap between the damping gasket and the cylinder barrel is blocked, hydraulic oil can only push the valve plate to flow into the lower portion of a cavity of the cylinder barrel through a through hole in the damping gasket, the requirements of high-speed damping and low-speed damping can be met at the same time, and the problem that equipment is damaged due to instant locking caused by sharp increase of damping force due to too high speed during working is solved. The utility model has the advantages of compact structure, small installation space, more reasonable stress, stable performance and long service life.

Description

Technical Field

[0001] This utility model relates to a shock absorption device in the field of automotive parts manufacturing, specifically a tension damping shock absorber. Background Technology

[0002] A damper is a device used to provide resistance to motion and dissipate kinetic energy. It absorbs energy and reduces vibration through damping, and is widely used in industries such as aerospace, aviation, military, firearms, and automobiles. The main function of a damper (or shock absorber) is to reduce vibration and dissipate energy in motion, thereby achieving vibration control. This technology has mature applications in many industrial fields, especially in the vibration control of piping systems and equipment.

[0003] Hydraulic dampers are speed-responsive vibration control devices that provide effective vibration mitigation solutions for specific applications. They are commonly used for vibration control of pipelines and equipment in critical industrial facilities such as nuclear power plants, thermal power plants, chemical plants, and steel mills. They effectively control pipeline vibrations caused by impact fluid vibrations, such as rapid closure of main steam valves, safety valve discharge, water hammer, and pipe rupture accidents. Furthermore, hydraulic dampers also demonstrate high reliability in controlling pipeline vibrations caused by seismic disturbances.

[0004] However, existing hydraulic dampers have a fixed piston damping orifice, which results in poor control of low-amplitude high-frequency or high-amplitude low-frequency vibrations. This means that they cannot simultaneously meet the needs of high-speed and low-speed damping. In addition, the cylinder and piston rod surfaces of the damper usually lack effective protection measures. In practical applications, they are prone to rust after impacts, and damage to the piston rod in particular can seriously affect the service life of the damper.

[0005] Therefore, there is an urgent need for a damper to solve the problems of poor performance, insufficient protection, and low durability of existing hydraulic dampers under different working conditions. Utility Model Content

[0006] The purpose of this utility model is to provide a tensile damping shock absorber to solve the aforementioned technical problems. Technical solution: The tensile damping shock absorber includes a piston rod, a piston, a cylinder, a compression spring, a rod end connector, and a pipe end connector. One end of the piston rod is connected to the rod end connector, and the other end is connected to the piston. The piston is slidably mounted inside the cylinder. The closed end of the cylinder is connected to the pipe end connector. The compression spring is sleeved on the outer periphery of the piston rod and the cylinder. The outer periphery of the compression spring is provided with a shell. The piston includes a piston guide mechanism, a one-way damping mechanism, and a fixing and locking mechanism sequentially sleeved on the piston rod, wherein:

[0007] The piston guiding mechanism includes a piston gasket and a piston guide. The piston gasket is sleeved on the piston rod, and the piston guide is sleeved on the outer periphery of the piston gasket.

[0008] The one-way damping mechanism includes a copper washer and a damping mechanism. The copper washer is sleeved on the outer periphery of the piston rod and located below the piston guide. The damping mechanism includes an O-ring sleeved on the outer periphery of the piston rod from top to bottom, a damping pad sleeved on the piston rod, and several valve plates. The O-ring is located below the copper washer.

[0009] The fixing and locking mechanism includes a locking nut and a locking washer, which are sequentially sleeved on the piston rod from top to bottom and located below the valve plate.

[0010] In one specific implementation, outer casing gaskets are fitted around the connection between the rod end connector and the piston rod, and around the connection between the tube end connector and the cylinder barrel. The two outer casing gaskets are located at both ends inside the outer casing. The two ends of the compression spring abut against the opposite surfaces of the two outer casing gaskets.

[0011] The above technical solution provides a mounting carrier for the compression spring, ensuring that the compression spring can achieve the function of compression and shock absorption.

[0012] In one specific implementation, the housing gasket is made of rubber.

[0013] The above technical solution, using a soft connection, can provide instantaneous buffering.

[0014] In one specific implementation, the housing includes a rod end housing and a tube end housing, with one end of the tube end housing, away from the tube end connector, embedded in the rod end housing.

[0015] The above technical solution facilitates the disassembly and installation of the outer casing.

[0016] In one specific implementation, a spacer is fitted onto the piston rod, one end of which contacts the lower surface of the piston gasket and the other end of which contacts the upper surface of the damping gasket, and both the copper washer and the O-ring are fitted around the outer periphery of the spacer.

[0017] Through the above technical solution, the spacer can absorb the impact that may be generated during piston assembly, reduce vibration and noise, ensure the correct relative position between components, and at the same time, it can accurately adjust the assembly clearance between components, thereby improving the stability and reliability of the piston doing work in the cylinder.

[0018] In one specific implementation, a guide frame, an oil seal, and an isolation gasket are sequentially fitted onto the piston rod from top to bottom, with the piston gasket located below the isolation gasket.

[0019] Through the above technical solutions, the guide frame ensures that the piston moves along the axial direction of the piston rod inside the cylinder, the oil seal prevents the leakage of lubricating oil inside the cylinder, and the isolation gasket is used to fill the gap between the oil seal and the piston guide mechanism, thereby increasing stability.

[0020] In one specific implementation, the damping pad has several through holes, and a flow groove is formed on one of the valve plates near the damping pad.

[0021] The above technical solution enables the hydraulic oil in the cylinder to pass through the gap between the damping gasket and the valve plate.

[0022] Beneficial effects: This utility model provides protection and dust prevention for the piston and piston rod by setting an outer shell around the compression spring, thereby increasing their service life. Through the damping mechanism, the O-ring moves upward during compression, creating a gap between the O-ring and the damping pad. Hydraulic oil flows through this gap to the piston rod end without resistance. During extension, the O-ring descends, sealing the gap between the damping pad and the cylinder. Hydraulic oil can only flow through the through-hole on the damping pad, pushing the valve plate into the lower part of the cylinder cavity. This design simultaneously addresses the needs of high-speed and low-speed damping, and avoids damage to the equipment caused by instantaneous locking due to a surge in damping force at excessively high operating speeds. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is an exploded view of the present invention.

[0025] Figure 3 This is a schematic diagram of the installation structure of the piston rod and piston in this utility model.

[0026] Figure 4 This is a schematic diagram of the piston inside the cylinder when the piston rod is compressed downwards in this utility model.

[0027] Figure 5 This is a schematic diagram of the piston structure inside the cylinder when the piston rod extends upward in this utility model.

[0028] Figure 6 This is a schematic diagram of the damping pad in this utility model.

[0029] Figure 7 This is a schematic diagram of the valve plate in this utility model.

[0030] Reference numerals: 1. Housing; 101. Rod end housing; 102. Tube end housing; 2. Rod end connector; 3. Tube end connector; 4. Compression spring; 5. Piston rod; 6. Piston; 601. Locking nut; 602. Locking washer; 603. Valve plate; 6031. Flow groove; 604. Damping washer; 6041. Through hole; 605. O-ring; 606. Copper washer; 607. Piston guide; 608. Piston gasket; 609. Isolation washer; 610. Oil seal; 611. Guide frame; 7. Cylinder; 8. Housing gasket. Detailed Implementation

[0031] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0032] like Figures 1 to 2 As shown, a tension damping shock absorber, hereinafter referred to as "the device", includes a piston rod 5, a piston 6, a cylinder 7, a compression spring 4, a rod end connector 2, a pipe end connector 3, and a housing 1. One end of the piston rod 5 is connected to the rod end connector 2, and the other end is connected to the piston 6. The piston 6 is slidably mounted inside the cylinder 7. The closed end of the cylinder 7 is connected to the pipe end connector 3. The compression spring 4 is sleeved on the outer periphery of the piston rod 5 and the cylinder 7. The housing 1 is sleeved on the outer periphery of the compression spring 4, providing protection and dust prevention for the surfaces of the cylinder 7 and the piston rod 5, thus extending the service life of the device.

[0033] The outer periphery of the connection between the rod end connector 2 and the piston rod 5, and the outer periphery of the connection between the pipe end connector 3 and the cylinder 7 are both fitted with outer housing washers 8. The two outer housing washers 8 are located at both ends inside the outer housing 1. The two ends of the compression spring 4 abut against the opposite surfaces of the two outer housing washers 8, so that the compression spring 4 can realize the function of compression and shock absorption.

[0034] Specifically, the outer casing gasket 8 is made of rubber and uses a flexible connection to provide instantaneous cushioning.

[0035] Specifically, the housing 1 includes a rod end housing 101 and a tube end housing 102. The end of the tube end housing 102 away from the tube end connector 3 is embedded in the rod end housing 101, which facilitates the disassembly and installation of the housing 1.

[0036] Furthermore, the outer shell is made of polypropylene, which has good corrosion resistance and durability.

[0037] See Figure 3The piston 6 includes a piston guide 607 mechanism, a one-way damping mechanism, and a fixing and locking mechanism, which are sequentially sleeved on the piston rod 5. The piston guide 607 mechanism includes a piston gasket 608 and a piston guide 607. The piston gasket 608 is sleeved on the piston rod 5 to support the piston guide 607. The piston guide 607 is installed on the outer periphery of the piston gasket 608 to ensure that the piston 6 can move parallel within the cylinder 7 when the device extends or retracts.

[0038] The one-way damping mechanism includes a copper washer 606 and a damping mechanism. The copper washer 606 is sleeved on the outer periphery of the piston rod 5 and located below the piston guide 607. The damping mechanism includes an O-ring 605 sleeved on the outer periphery of the piston rod 5 from top to bottom, a damping pad 604 sleeved on the piston rod 5, and several valve plates 603. The O-ring 605 is located below the copper washer 606.

[0039] Specifically, the copper washer 606 is used to support the piston guide 607 mechanism and the one-way damping mechanism, and the copper washer 606 ensures that the O-ring 605 is always in a flat state, which can speed up the movement and sealing of the O-ring 605; at the same time, the copper washer 606 is made of copper, which can effectively protect the inside of the cylinder 7 from scratches.

[0040] Specifically, see Figures 6 to 7 The damping pad 604 has several through holes 6041, and a valve plate 603 near the damping pad 604 has a flow groove 6031. The hydraulic oil in the cylinder 7 passes through the gap between the damping pad 604 and the valve plate 603.

[0041] In a further embodiment, a spacer is fitted onto the piston rod 5. One end of the spacer contacts the lower surface of the piston gasket 608, and the other end contacts the upper surface of the damping gasket 604. The copper washer 606 and the O-ring 605 are both fitted around the outer periphery of the spacer. This can absorb the impact that may be generated during the assembly of the piston 6, reduce vibration and noise, ensure the correct relative position between components, and precisely adjust the assembly gap between components, thereby improving the stability and reliability of the piston 6 performing work in the cylinder 7.

[0042] See Figures 4 to 5When piston rod 5 is compressed downwards, piston 6 moves downwards, and O-ring 605 moves upwards, creating a gap between O-ring 605 and damping pad 604. Hydraulic oil flows through this gap to the end of piston rod 5, and piston 6 does not generate resistance during compression. When piston rod 5 extends upwards, O-ring 605 moves downwards, sealing the gap between damping pad 604 and cylinder 7. Hydraulic oil can only flow through the through hole 6041 on damping pad 604, pushing valve plate 603 into the lower part of cylinder 7. Simultaneously, the damping force is adjusted by changing the number and thickness of valve plates 603. At low speeds, the damping force can flow through the gap between valve plates 603, and as the speed changes, the damping force increases, pushing the valve plates 603 open. Since the opening and closing size of valve plates 603 is proportional to the damping force, the instantaneous locking phenomenon caused by excessive speed in traditional dampers is avoided, thus preventing damage to the equipment.

[0043] The locking mechanism includes a locking nut 601 and a locking washer 602. The locking washer 602 and the locking nut 601 are sequentially sleeved on the piston rod 5 from top to bottom and located below the valve plate 603. The locking washer 602 is used to protect the valve plate 603 and prevent the valve plate 603 from not sealing properly due to uneven end faces when the locking nut 601 is tightened.

[0044] Continue reading Figure 3 The piston rod 5 is fitted with a guide frame 611, an oil seal 610, and an isolation washer 609 from top to bottom. The isolation washer 609 is located above the piston gasket 608. The guide frame 611 ensures that the piston 6 moves along the axial direction of the piston rod 5 in the cylinder 7. The oil seal 610 can prevent the lubricating oil in the cylinder 7 from leaking. The isolation washer 609 is used to fill the gap between the oil seal 610 and the piston guide 607 mechanism, increasing stability.

[0045] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and detail may be made to the present invention without departing from the spirit and scope of the appended claims.

Claims

1. A stretch-damping shock absorber comprising a piston rod, a piston, a cylinder, a compression spring, a rod end fitting, and a tube end fitting, one end of the piston rod being connected to the rod end fitting, the other end being connected to the piston, the piston being slidably installed in the cylinder, a closed end of the cylinder being connected to the tube end fitting, the compression spring being sleeved on the outer periphery of the piston rod and the cylinder, characterized in that, The compression spring is provided with an outer shell, the piston comprises a piston guide mechanism, a one-way damping mechanism and a fixed locking mechanism which are sequentially sleeved on the piston rod, wherein: The piston guide mechanism comprises a piston gasket and a piston guide, the piston gasket is sleeved on the piston rod, and the piston guide is sleeved on the outer periphery of the piston gasket; The one-way damping mechanism comprises a copper gasket and a damping mechanism, the copper gasket is sleeved on the outer periphery of the piston rod and is located below the piston guide, and the damping mechanism comprises an O-shaped ring, a damping gasket and a plurality of valve pieces which are sequentially sleeved on the outer periphery of the piston rod from top to bottom, and the O-shaped ring is located below the copper gasket; The fixed locking mechanism comprises a locking nut and a locking gasket, the locking gasket and the locking nut are sequentially sleeved on the piston rod from top to bottom and are located below the valve pieces.

2. The stretch-damping shock absorber of claim 1, wherein The outer peripheries of the connection between the rod end joint and the piston rod and the connection between the pipe end joint and the cylinder are sleeved with shell gaskets, and the two shell gaskets are respectively located at two ends in the outer shell; The two ends of the compression spring respectively abut against opposite surfaces of the two shell gaskets.

3. The stretch-damping shock absorber of claim 2, wherein The shell gaskets are made of rubber.

4. The stretch-damping shock absorber of claim 1, wherein The outer shell comprises a rod end shell and a pipe end shell, and the pipe end shell is embedded in the rod end shell at an end away from the pipe end joint.

5. The stretch-damping shock absorber of claim 1, wherein A spacer sleeve is sleeved on the piston rod, one end of the spacer sleeve is in contact with the lower surface of the piston gasket, the other end is in contact with the upper surface of the damping gasket, and the copper gasket and the O-shaped ring are sleeved on the outer periphery of the spacer sleeve.

6. The stretch-damping shock absorber of claim 1, wherein A guide skeleton, an oil seal and an isolation gasket are sequentially sleeved on the piston rod from top to bottom, and the piston gasket is located below the isolation gasket.

7. The stretch-damping shock absorber of claim 1, wherein A plurality of through holes are formed in the damping gasket, and a flow-through groove is formed in a valve piece close to the damping gasket.

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