Double-rod type single-cylinder shock absorber

Abstract

The utility model relates to the technical field of shock absorbers, and discloses a double-rod type single-cylinder shock absorber which comprises a shock absorber cylinder body, an air cylinder, a piston and a piston rod. Clamping end covers are clamped to the two ends of the shock absorber cylinder, piston rods are arranged on the clamping end covers in a penetrating mode, locking hoops are arranged in the middles of the piston rods, supporting sleeve plates sleeve one sides of the locking hoops, and buffer springs sleeve the positions, located on the outer sides of the piston rods, between the supporting sleeve plates and the clamping end covers. The other free end of the piston rod is connected with a piston through a connecting sleeve seat, the piston is located in the shock absorber barrel, a nitrogen cavity is formed between the two pistons, the shock absorber barrel is sleeved with a limiting ring B, and one end of the limiting ring B is connected with a limiting ring A through a supporting block; according to the double-rod type single-cylinder shock absorber, the shock absorption effect of the shock absorber can be improved, the damaged buffer spring can be replaced conveniently, operation is convenient, the anti-deformation effect of the piston is improved, and the piston is not prone to being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to a double-rod single-tube shock absorber. Background Art

[0002] Shock absorbers are devices used to accelerate the attenuation of frame and body vibrations in order to improve the ride smoothness (comfort) of the car. Shock absorbers are installed inside the suspension systems of most cars. Double-rod monotube shock absorbers are a type of vibration reduction device with a specific structure and function, and are mainly used to improve and adjust the ride comfort and stability of the vehicle.

[0003] The conventional double-rod monotube shock absorber has the following disadvantages: 1. It cannot improve the shock absorption effect of the shock absorber, and it is inconvenient to replace the damaged buffer spring, which wastes manpower and material resources, and it cannot improve the anti-deformation effect of the piston and is easy to be damaged. Therefore, those skilled in the art provide a double-rod monotube shock absorber to solve the problems raised in the above background technology. Utility Model Content

[0004] The main purpose of the utility model is to provide a double-rod monotube shock absorber to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A double-rod monotube shock absorber comprises a shock absorber cylinder, an air reservoir, a piston and a piston rod;

[0007] Both ends of the shock absorber cylinder are clamped with clamping end covers, and the clamping end covers are penetrated by piston rods, a locking hoop is provided in the middle part of the piston rod, and a supporting sleeve is sleeved on one side of the locking hoop, a buffer spring is sleeved between the supporting sleeve and the clamping end cover and on the outside of the piston rod, the other free end of the piston rod is connected with a piston through a connecting sleeve, and the piston is located in the shock absorber cylinder, a nitrogen chamber is provided between the two groups of the pistons, a limiting ring B is sleeved on the outside of the shock absorber cylinder, and one end of the limiting ring B is connected to the limiting ring A through a supporting block, an air cylinder is sleeved in the limiting ring A, a polyurethane elastic air film is provided in the air cylinder through a limiting slot, the top of the air cylinder is connected to the nitrogen chamber in the shock absorber cylinder through a connecting pipe, and reinforcing ribs are welded on the outside of the connecting sleeve and at equal distances along the radial direction of the piston.

[0008] As a further solution of the utility model: a guide sleeve is provided on the engaging end cover and an oil seal is provided inside the guide sleeve, the piston rod passes through the oil seal, the guide sleeve guides the piston rod, and the oil seal further improves the sealing performance of the connection.

[0009] As a further solution of the utility model: a non-slip gasket is clamped between the locking hoop and the supporting sleeve, and the non-slip gasket is used to improve the anti-slip property of the locking hoop, so that the supporting sleeve is tightly pressed onto the locking hoop.

[0010] As a further solution of the utility model: a connecting block is welded to the free end of the piston rod and an axial hole is opened on the connecting block.

[0011] As a further solution of the utility model: a control valve is arranged on the connecting pipe.

[0012] As a further solution of the utility model: the connecting sleeve and the reinforcing ribs are both made of stainless steel, and the reinforcing ribs are bonded to one side of the piston.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The monotube shock absorber is conveniently fixed inside the suspension system of the automobile by using the shaft hole on the connecting block and the matching fixing pin shaft, and the piston rod is used to drive the piston to move toward each other in the shock absorber cylinder, squeezing the nitrogen in the nitrogen cavity, so that the nitrogen enters the air reservoir through the connecting pipe, and the polyurethane elastic air film in the air reservoir has high elasticity, good toughness and buffering function, thereby improving the damping and shock absorbing effect of the shock absorber, and adopts the double rod and double spring form to further improve the buffering effect of the shock absorber and improve the shock absorbing effect of the shock absorber.

[0015] 2. The buffer spring is limited by the locking hoop and the supporting sleeve, and it is easy to install and disassemble, and it is convenient to replace the damaged buffer spring, which is convenient to operate and saves manpower and material resources. The outer side of the connecting sleeve is welded with reinforcing ribs at equal distances along the radial direction of the piston, which improves the anti-deformation effect of the piston, is not easy to be damaged, and is durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the double-rod single-tube shock absorber of the utility model.

[0017] Figure 2 The utility model is a schematic diagram of the piston and the engaging end cover structure of the double-rod single-tube shock absorber.

[0018] Figure 3 The utility model is a schematic diagram of the internal structure of the air storage cylinder of the double-rod single-tube shock absorber.

[0019] In the figure: 1. limit ring A; 2. air storage cylinder; 3. connecting pipe; 4. control valve; 5. connecting block; 6. piston rod; 7. support sleeve; 8. buffer spring; 9. snap-fit ​​end cover; 10. shock absorber cylinder; 11. limit ring B; 12. support block; 13. locking clamp; 14. anti-slip gasket; 15. oil seal; 16. guide sleeve; 17. connecting sleeve seat; 18. reinforcing rib; 19. piston; 20. polyurethane elastic air film. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-3 In the embodiment of the utility model, the double-rod monotube shock absorber comprises a shock absorber cylinder 10, an air reservoir 2, a piston 19 and a piston rod 6;

[0022] Both ends of the shock absorber cylinder 10 are engaged with engaging end covers 9, and the engaging end covers 9 are penetrated with piston rods 6. A locking hoop 13 is provided in the middle part of the piston rod 6, and a support sleeve 7 is sleeved on one side of the locking hoop 13. A buffer spring 8 is sleeved between the support sleeve 7 and the engaging end cover 9 and on the outside of the piston rod 6. The other free end of the piston rod 6 is connected to a piston 19 through a connecting sleeve 17, and the piston 19 is located in the shock absorber cylinder 10. A nitrogen cavity is provided between the two groups of pistons 19. A limiting ring B11 is sleeved on the outside of the shock absorber cylinder 10, and one end of the limiting ring B11 is connected to the limiting ring A1 through a supporting block 12. An air reservoir 2 is sleeved in the limiting ring A1, and a polyurethane elastic gas film 20 is provided in the air reservoir 2 through a limiting groove. The top of the air reservoir 2 is connected to the nitrogen cavity in the shock absorber cylinder 10 through a connecting pipe 3, and reinforcing ribs 18 are welded on the outside of the connecting sleeve 17 and along the radial direction of the piston 19 at equal distances.

[0023] Among them, a guide sleeve 16 is arranged on the engaging end cover 9 and an oil seal 15 is arranged inside the guide sleeve 16, and the piston rod 6 passes through the oil seal 15; the guide sleeve 16 guides the piston rod 6, and the oil seal 15 further improves the sealing performance of the connection.

[0024] Among them, an anti-skid gasket 14 is clamped between the locking hoop 13 and the supporting sleeve 7; the anti-skid gasket 14 is used to improve the anti-skid property of the locking hoop 13, so that the supporting sleeve 7 is tightly pressed on the locking hoop 13.

[0025] The free end of the piston rod 6 is welded with a connecting block 5 and an axial hole is formed on the connecting block 5. The axial hole on the connecting block 5 and the matching fixing pin are used to fix the monotube shock absorber inside the suspension system of the automobile.

[0026] Among them, a control valve 4 is arranged on the connecting pipe 3; the control valve 4 is used to adjust the gas flow entering the gas storage cylinder 2 to meet different usage requirements.

[0027] The connecting sleeve 17 and the reinforcing rib 18 are both made of stainless steel, and the reinforcing rib 18 is bonded to one side of the piston 19, thereby improving the anti-deformation effect of the piston 19, making it not easy to be damaged and durable.

[0028] The working principle of the utility model is as follows: the axial hole on the connecting block 5 and the matching fixed pin shaft are used to fix the monotube shock absorber inside the suspension system of the automobile, the piston rod 6 is used to drive the piston 19 to move toward each other in the shock absorber cylinder 10, and the nitrogen in the nitrogen cavity is squeezed, so that the nitrogen enters the air storage cylinder 2 through the connecting pipe 3, and the polyurethane elastic air film 20 in the air storage cylinder 2 is used, which has high elasticity, good toughness, and a buffering function to improve the damping and shock absorbing effect of the shock absorber, and the double rod and double spring form are adopted to further improve the buffering effect of the shock absorber, improve the shock absorbing effect of the shock absorber, use the locking clamp 13 and the support sleeve 7 to limit the buffer spring 8, and it is easy to install and disassemble, and it is convenient to replace the damaged buffer spring 8, which is convenient to operate and saves manpower and material resources, and the outer side of the connecting sleeve 17 is welded with reinforcing ribs 18 at equal distances along the radial direction of the piston 19, which improves the anti-deformation effect of the piston 19, is not easy to be damaged, and is durable.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A double-rod single-tube shock absorber, comprising a shock absorber cylinder (10), an air reservoir (2), a piston (19) and a piston rod (6); It is characterized by: Both ends of the shock absorber cylinder (10) are engaged with engaging end covers (9), and the engaging end covers (9) are both provided with piston rods (6). A locking hoop (13) is provided in the middle of the piston rod (6), and a support sleeve (7) is sleeved on one side of the locking hoop (13). A buffer spring (8) is sleeved between the support sleeve (7) and the engaging end covers (9) and on the outside of the piston rod (6). The other free end of the piston rod (6) is connected to a piston (19) via a connecting sleeve (17), and the piston (19) is located in the shock absorber cylinder (10). The two groups of the piston rods (6) are provided with a locking hoop (13). A nitrogen cavity is arranged between the plugs (19); a limiting ring B (11) is sleeved on the outer side of the shock absorber cylinder (10); one end of the limiting ring B (11) is connected to the limiting ring A (1) via a support block (12); an air reservoir (2) is sleeved inside the limiting ring A (1); a polyurethane elastic air membrane (20) is arranged inside the air reservoir (2) via a limiting groove; the top of the air reservoir (2) is connected to the nitrogen cavity in the shock absorber cylinder (10) via a connecting pipe (3); reinforcing ribs (18) are welded on the outer side of the connecting sleeve (17) and at equal distances along the radial direction of the piston (19).

2. The double-rod monotube shock absorber according to claim 1, characterized in that: A guide sleeve (16) is provided on the engaging end cover (9), and an oil seal (15) is provided inside the guide sleeve (16), and the piston rod (6) passes through the oil seal (15).

3. The double-rod monotube shock absorber according to claim 1, characterized in that: An anti-slip gasket (14) is clamped between the locking hoop (13) and the supporting sleeve (7).

4. The double-rod monotube shock absorber according to claim 1, characterized in that: A connecting block (5) is welded to the free end of the piston rod (6), and an axial hole is provided on the connecting block (5).

5. The double-rod monotube shock absorber according to claim 1, characterized in that: The connecting pipe (3) is provided with a control valve (4).

6. The double-rod monotube shock absorber according to claim 1, characterized in that: The connecting sleeve (17) and the reinforcing rib (18) are both made of stainless steel, and the reinforcing rib (18) is bonded to one side of the piston (19).

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