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CN-224229156-U - Guide oil seal structure for automobile shock absorber

CN224229156UCN 224229156 UCN224229156 UCN 224229156UCN-224229156-U

Abstract

The utility model relates to the technical field of automobile vibration dampers, in particular to a guide oil seal structure for an automobile vibration damper. The guide assembly comprises a guide base, three layers of stepped holes are formed in the guide base, a check valve body is arranged in the first layer of stepped holes, three layers of stepped holes are formed in the check valve body, an oil seal assembly is arranged in the last layer of stepped holes, an oil scraping ring is arranged in the last layer of stepped holes, the center of the oil seal assembly is an oil seal inner hole, a first lip and a third lip are respectively arranged at two ends of the oil seal inner hole, a second lip is arranged in the middle section of the oil seal inner hole, a spring is sleeved on the outer side between the second lip and the third lip, a check lip is arranged on the outer side of the spring, the check lip is pressed on the check valve body to form a check valve, and a metal framework is embedded on one side of the oil seal assembly. Compared with the prior art, the leakage probability of oil liquid and air is reduced, the squeaking abnormal sound caused by air circulation is reduced, the friction abnormal sound is reduced, and the tightness of the oil seal is increased.

Inventors

  • CHU ZHUJIN

Assignees

  • 上海汇众萨克斯减振器有限公司

Dates

Publication Date
20260512
Application Date
20250424

Claims (6)

  1. 1. A guide oil seal structure for an automobile shock absorber comprises a guide assembly (1), a check valve body (2) and an oil seal assembly (3), and is characterized in that the guide assembly (1) comprises a guide base (4), three layers of stepped holes are formed in the guide base (4), uniformly distributed oil drain exhaust holes (5) are formed in the first layer of stepped holes, the check valve body (2) is arranged in the first layer of stepped holes, a metal lining (7) is arranged in the third layer of stepped holes, three layers of stepped holes are formed in the check valve body (2), oil drain exhaust grooves (8) are uniformly formed in the upper end of the stepped hole of a top layer, the oil seal assembly (3) is arranged in the stepped hole of the top layer, an oil scraping ring (9) is arranged in the stepped hole of the last layer, the oil seal assembly (3) comprises an oil seal inner hole (10), a first lip (11), a second lip (12), a third lip (13), a check lip (14), a spring (15) and a metal framework (16), the center of the oil seal assembly (3) is provided with an oil seal inner hole (10), lips (10) and lips (12) are respectively arranged at two ends (13) and two ends (13) of the middle section (12), the outer side of the spring (15) is provided with a non-return lip (14), the non-return lip (14) is pressed on the non-return valve body (2) to form a one-way valve, and one side of the oil seal assembly (3) is embedded with a metal framework (16).
  2. 2. The guide oil seal structure for the automobile shock absorber of claim 1, wherein the outer side of the first layer of stepped holes of the guide base (4) is uniformly provided with reinforcing ribs (6).
  3. 3. The oil seal structure of a guide for an automobile shock absorber according to claim 1, wherein the first-layer stepped hole of the guide base (4) is in interference fit with the non-return valve body (2), and the third-layer stepped hole is in interference fit with the metal bushing (7).
  4. 4. An automobile shock absorber comprises a guide oil seal structure, a shock absorber outer cylinder (17), a shock absorber inner cylinder (18) and a piston rod (19) according to any one of claims 1-3, and is characterized in that one end of the shock absorber is provided with the guide oil seal structure, the top end of the shock absorber inner cylinder (18) is propped against the outer side of a guide base (4), the shock absorber outer cylinder (17) is arranged on the outer side of the shock absorber inner cylinder (18), the piston rod (19) penetrates through the guide oil seal structure and stretches into the shock absorber inner cylinder (18), and the piston rod (19) reciprocates in the guide oil seal assembly.
  5. 5. The automobile shock absorber of claim 4, wherein the diameter of each layer of three layers of stepped holes of the guide base (4) is larger than the diameter of the piston rod (19), and the diameter of each layer of stepped holes of the three layers of the check valve body (2) is larger than the diameter of the piston rod (19).
  6. 6. A shock absorber for a vehicle according to claim 4, wherein the oil scraper ring (9) is in clearance fit with the metal bush (7) and the piston rod (19).

Description

Guide oil seal structure for automobile shock absorber Technical Field The utility model relates to the technical field of automobile vibration dampers, in particular to a guide oil seal structure for an automobile vibration damper. Background The quality requirements of the whole car manufacturers on the car parts are continuously improved. The automobile shock absorber plays a critical role in competition of the automobile industry as a key factor affecting the control stability and the running smoothness of the automobile. It is noted that the working lubrication conditions of the piston rod have a direct influence on the performance and working efficiency of the shock absorber. How to ensure that the piston rod can smoothly move up and down and simultaneously prevent oil in the cylinder from leaking, and effectively ensure the normal operation of the shock absorber is a problem to be solved. Disclosure of utility model In order to solve the problems in the prior art, the utility model provides a guide oil seal structure for an automobile shock absorber, which comprises a guide assembly, a check valve body and an oil seal assembly, wherein the guide assembly comprises a guide base, three layers of stepped holes are formed in the guide base, the first layer of stepped holes are provided with uniformly distributed oil drain holes, the check valve body is installed in the first layer of stepped holes, a metal bushing is arranged in the third layer of stepped holes, three layers of stepped holes are formed in the check valve body, an oil drain exhaust groove is uniformly formed in the upper end of the stepped hole of the top layer, the oil seal assembly is installed in the stepped hole of the top layer, an oil scraping ring is arranged in the stepped hole of the last layer, the oil seal assembly comprises an oil seal inner hole, a first lip, a second lip, a third lip, a check lip, a spring and a metal framework, the center of the oil seal assembly is the oil seal inner hole, two ends of the oil seal inner hole are respectively provided with the first lip and the third lip, a spring is sleeved on the outer side between the second lip and the third lip, the check lip is provided with the check lip, the check valve body is embedded on the check valve body, and one side of the check valve body is formed by the check valve body. Reinforcing ribs are uniformly arranged on the outer side of the first layer of stepped holes of the guide base. The first layer of step hole of the guide base is in interference fit with the non-return valve body, and the third layer of step hole is in interference fit with the metal bushing. The automobile shock absorber comprises a shock absorber outer cylinder, a shock absorber inner cylinder and a piston rod, wherein one end of the shock absorber is provided with a guide oil seal structure, the top end of the shock absorber inner cylinder abuts against the outer side of a guide base, the outer side of the shock absorber inner cylinder is provided with a shock absorber outer cylinder, the piston rod penetrates through the guide oil seal structure and stretches into the shock absorber inner cylinder, and the piston rod reciprocates in the guide oil seal assembly. The diameter of each layer of three layers of stepped holes of the guide device base is larger than the diameter of the piston rod, and the diameter of each layer of stepped holes of the three layers of the check valve body is larger than the diameter of the piston rod. The oil scraper ring is in clearance fit with the metal bushing and the piston rod. Compared with the prior art, the oil seal has the advantages that the leakage probability of oil and air is reduced, the squeaking abnormal sound caused by air circulation is reduced, the friction abnormal sound is reduced, and the tightness of the oil seal is improved. Drawings FIG. 1 is a schematic diagram of a guide oil seal; FIG. 2 is a cross-sectional, front, top and bottom view of the guide assembly; FIG. 3 is a cross-sectional view and a perspective view of the check valve body; FIG. 4 is a schematic view of the structure of the guide assembly with a non-return valve body; FIG. 5 is a cross-sectional view and a perspective view of an oil seal assembly; FIG. 6 is a schematic diagram of an automotive shock absorber construction; FIG. 7 is a schematic diagram of the gas flow direction of the pilot oil seal; FIG. 8 is a schematic view of a check lip and check valve body forming a one-way gas valve; Referring to fig. 1 to 6,1, a guide assembly, 2, a non-return valve body, 3, an oil seal assembly, 4, a guide base, 5, an oil drain and vent hole, 6, a reinforcing rib, 7, a metal bushing, 8, an oil drain and vent groove, 9, an oil scraper ring, 10, an oil seal inner hole, 11, a first lip, 12, a second lip, 13, a third lip, 14, a non-return lip, 15, a spring, 16, a metal framework, 17, an outer damper cylinder, 18, an inner damper cylinder, 19 and a piston rod. Detailed Description