Inflatable shock absorber with high sealing performance

Abstract

The inflatable shock absorber comprises an outer cylinder, a floating piston is movably arranged in the outer cylinder and divides the outer cylinder into an oil cavity and an air cavity, a piston rod penetrates through the oil cavity and is connected with a rebuilt valve assembly, and a guide seat is clamped at the position, close to an opening of the oil cavity, of the outer cylinder. An outer sealing body is embedded in the guide seat, a first clamping groove is formed in the top end of the outer sealing body, the aperture of the first clamping groove is gradually increased from top to bottom, a second clamping groove is formed in the position, connected with the first clamping groove, of the outer sealing body, and the aperture of the second clamping groove is gradually decreased from top to bottom; a first clamping part capable of being clamped into the first clamping groove and a second clamping part capable of being clamped into the second clamping groove are arranged on the inner sealing body, a guide hole allowing the piston rod to penetrate through is formed in the middle of the inner sealing body, the inner sealing body is made of a wear-resistant material, and the outer sealing body is made of a pressure-resistant material. The wear-resistant sealing performance and the pressure-resistant performance of the shock absorber can be improved, and the shock absorber is particularly suitable for high-oil-pressure inflatable shock absorbers.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shock absorber, concretely relates to a high sealing inflatable shock absorber. BACKGROUND

[0002] The shock absorber is an important component in the automobile suspension system. In order to reduce the weight of the shock absorber and increase the damping force of the shock absorber, one kind of shock absorber adopts the high-pressure nitrogen gas arranged in the shock absorber to replace part of the oil. Due to the high-pressure nitrogen gas structure, the pressure in the shock absorber is significantly increased. In the actual use process, due to the high pressure, the oil seal structure in the shock absorber is deformed due to the excessive oil pressure, which affects the sealing performance of the shock absorber. If the oil seal with high-pressure resistance is used, the wear resistance is insufficient. In the long-term reciprocating movement of the piston rod, the wear and consumption of the oil seal are large, which reduces the service life of the shock absorber. SUMMARY

[0003] In view of the deficiencies in the background art, the technical problem to be solved by the utility model is to provide a high sealing inflatable shock absorber for solving the above problems.

[0004] To this end, the utility model is realized by adopting the following scheme:

[0005] A kind of high sealing inflatable shock absorber, including outer cylinder, the floating piston is movably arranged in the outer cylinder, the floating piston separates outer cylinder into oil cavity and gas cavity, piston rod is worn into oil cavity, the piston rod is connected with recovery valve assembly, it is characterized by: the outer cylinder is clamped with guide seat at the opening close to oil cavity, the guide seat is inlaid with outer seal body, the top of outer seal body is provided with first clamping groove, the hole diameter of first clamping groove gradually increases from top to bottom, outer seal body is connected first clamping groove and is provided with second clamping groove, the hole diameter of second clamping groove gradually decreases from top to bottom, further including inner seal body, the first clamping portion of first clamping groove can be clamped into the first clamping portion of first clamping groove, and the second clamping portion of second clamping groove can be clamped into the second clamping portion of second clamping groove, the inner seal body has the guide hole that can be passed through in the middle part of inner seal body, and the inner seal body adopts wear-resistant material.

[0006] The outer side wall of the guide seat has an annular groove, the inner side wall of the outer cylinder has a positioning protrusion that can be clamped into the annular groove, the middle part of the guide seat has a through hole, a bushing is arranged in the through hole, and the piston rod passes through the through hole.

[0007] The outer side wall of the floating piston is provided with a first annular groove and a second annular groove, a piston ring is arranged in the first annular groove, and a D-shaped sealing ring is arranged in the second annular groove.

[0008] The upper sealing body is arranged on the guide seat, and the piston rod passes through the upper sealing body; one end of the outer cylinder body is provided with a gland, and the gland tightly presses the upper sealing body on the guide seat.

[0009] The inner sealing body is made of composite polyurethane material.

[0010] The high-sealing inflatable shock absorber is characterized in that the outer sealing body and the inner sealing body are combined, the outer sealing body and the inner sealing body are arranged in a special embedded mode, the sealing performance of the combined outer sealing body and inner sealing body is ensured, the assembly of the outer sealing body and the inner sealing body is facilitated, the inner sealing body is made of wear-resistant material to ensure the stability of the long-time cooperation with the piston rod, the additional sealing body is made of high-pressure-resistant material to ensure the pressure resistance of the combined sealing body and the sealing performance of the combined sealing body in the high-pressure environment. BRIEF DESCRIPTION OF DRAWINGS

[0011] The utility model discloses the following drawings:

[0012] Figure 1 It is the structure schematic diagram of the utility model;

[0013] Figure 2 It is Figure 1 It is the local enlarged view of the direction of A in the middle;

[0014] Figure 3 It is the split structure diagram of the outer sealing body and the inner sealing body of the utility model;

[0015] Figure 4 It is Figure 1 It is the local enlarged view of the direction of B in the middle. PREFERRED EMBODIMENT

[0016] As shown in the figure, the utility model discloses a kind of high-sealing inflatable shock absorber, including outer cylinder body 2, it is characterized in that: floating piston 4 is movably arranged in outer cylinder body 2, floating piston 4 separates outer cylinder body into oil cavity 5 and gas cavity 6, piston rod 1 is passed into oil cavity 5, piston rod 1 is connected with recovery valve assembly 3, outer cylinder body 2 is clamped with guide seat 9 at the opening close to oil cavity 5, outer sealing body 11 is embedded in guide seat 9, the top of outer sealing body 11 is provided with first clamping groove 17, the aperture of first clamping groove 17 gradually increases from top to bottom, second clamping groove 18 is arranged in the junction of outer sealing body 11 and first clamping groove 17, the aperture of second clamping groove 18 gradually decreases from top to bottom, further including inner sealing body 12, first clamping groove 17 is arranged on inner sealing body 12 The first clamping portion 15 that can be clamped into, and the second clamping portion 16 that can be clamped into second clamping groove 18, inner sealing body 12 has the guide hole that can be passed through in middle part piston rod 1, inner sealing body 12 is made of wear-resistant material, outer sealing body is made of pressure-resistant material.

[0017] Further, the outer side wall of the guide seat 9 has an annular groove, the inner side wall of the outer cylinder body 2 has a positioning protrusion 10 which can be inserted into the annular groove, the middle part of the guide seat 9 has a through hole, a bushing 14 is arranged in the through hole in correspondence, and the piston rod 1 passes through the through hole. With the above structure, the positioning of the installation and placement of the guide seat 9 can be realized.

[0018] Further, the outer side wall of the floating piston 4 is provided with a first annular groove and a second annular groove, the first annular groove is provided with a piston ring 19, and the second annular groove is provided with a D-shaped sealing ring 20. With the above structure, the sealing property of the floating piston 4 can be ensured by arranging the piston ring and the D-shaped sealing ring.

[0019] Further, the guide seat is further provided with an upper sealing body 7, the piston rod 1 passes through the upper sealing body 7, one end of the outer cylinder body 2 is provided with a gland 8, and the gland 8 tightly presses the upper sealing body 7 on the guide seat 9. With the above structure, the sealing property of the guide seat 9 can be further improved.

[0020] The inner sealing body 12 adopts a composite polyurethane material, so that the wear resistance of the inner sealing body 12 can be ensured, and the outer sealing body 11 adopts a polytetrafluoroethylene material, so that the pressure resistance of the outer sealing body 11 can be ensured.

[0021] The structure of the utility model, through the innovative design combination type outer sealing body and inner sealing body, simultaneously, the inner and outer sealing body adopt special embedded structure, ensure the sealing property and the convenience of assembly after the inner and outer sealing body assembly, and the inner sealing body adopts wear-resistant material to ensure its stability of long-time cooperation contact with the piston rod, the additional sealing body adopts high-pressure resistant material, ensure the pressure resistance of the whole assembled sealing body, ensure that it will not occur excessive deformation under the internal high-pressure environment and affect its sealing property.

Claims

1. A high-sealing air-filled shock absorber, comprising an outer cylinder (2), a floating piston (4) movably arranged in the outer cylinder (2), the floating piston (4) separating the outer cylinder into an oil chamber (5) and an air chamber (6), a piston rod (1) penetrating into the oil chamber (5), and a restoring valve assembly (3) connected to the piston rod (1), characterized in that: The outer cylinder (2) is clamped with a guide seat (9) near the opening of the oil cavity (5), the guide seat (9) is embedded with an outer sealing body (11), the top end of the outer sealing body (11) is provided with a first clamping groove (17), the aperture of the first clamping groove (17) gradually increases from top to bottom, the outer sealing body (11) is provided with a second clamping groove (18) connected with the first clamping groove (17), the aperture of the second clamping groove (18) gradually decreases from top to bottom, further comprising an inner sealing body (12), the inner sealing body (12) is provided with a first clamping part (15) clamped into the first clamping groove (17) and a second clamping part (16) clamped into the second clamping groove (18), the inner sealing body (12) has a guide hole for the piston rod (1) to pass through, the inner sealing body (12) is made of wear-resistant material, and the outer sealing body (11) is made of pressure-resistant material.

2. A high-sealing pneumatic shock absorber according to claim 1, characterized in that: The outer side wall of the guide seat (9) has an annular groove, the inner side wall of the outer cylinder (2) has a positioning protrusion (10) clamped into the annular groove, the middle part of the guide seat (9) has a through hole, a bushing (14) is arranged in the through hole, and the piston rod (1) passes through the through hole.

3. The high-sealability air spring of claim 1, wherein: The outer side wall of the floating piston (4) is provided with a first annular groove and a second annular groove, the first annular groove is provided with a piston ring (19), and the second annular groove is provided with a D-shaped sealing ring (20).

4. The high-sealability air spring of claim 1, wherein: The guide seat is further provided with an upper sealing body (7), the piston rod (1) passes through the upper sealing body (7), one end of the outer cylinder (2) is provided with a gland (8), and the gland (8) tightly presses the upper sealing body (7) on the guide seat (9).

5. The high-sealability air spring of claim 1, wherein: The inner sealing body (12) is made of composite polyurethane material, and the outer sealing body (11) is made of polytetrafluoroethylene material.

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