Oil seal mounting structure

Abstract

The utility model relates to an oil seal installation structure which comprises a shaft body, a shell and an installation hole located in the shell, the shaft body is arranged in the installation hole in a penetrating mode, an oil seal body is arranged on the shaft body in a sleeved mode, the oil seal body seals the shaft body and the installation hole, an oil seal retaining groove is formed in the hole wall of the installation hole, and the oil seal retaining groove is located on the outer side of the peripheral face of the oil seal body. And a positioning block is arranged between the shaft body and the mounting hole, is in contact with the oil seal body and is used for positioning the mounting of the oil seal body. The oil seal retaining groove capable of adjusting the air pressure is formed in the oil seal, when the air pressure in the shell is too high, the oil seal retaining groove plays a role in buffering and adjusting, so that the air pressure inside and outside the shell is more balanced, the oil seal body is prevented from popping up due to the too high air pressure, stable installation of the oil seal body is guaranteed, sealing reliability is guaranteed, leakage is reduced, and the service life of the oil seal is prolonged. Therefore, the normal operation of the internal structure of the shell is ensured; the check ring and the positioning check block are arranged to position the oil seal body, and it is guaranteed that the oil seal body is installed in place.

Description

Technical Field

[0001] The utility model relates to an oil seal installation structure and belongs to the technical field of oil seals. Background Art

[0002] The main function of the oil seal is to prevent external pollutants such as dust, moisture, liquid, etc. from entering the housing, and to prevent the liquid inside the housing from leaking out, such as preventing the lubricating oil in the motor oil chamber from leaking out and endangering the safety of the magnet, coil and other parts. However, the stability of the oil seal installation is affected by the pressure inside the housing. When the pressure inside the housing is too high, the oil seal is easy to pop out during installation, resulting in seal failure and affecting the coordination and operation of the internal structure of the housing. Utility Model Content

[0003] The utility model aims to provide an oil seal installation structure for preventing an oil seal body from being ejected due to excessive air pressure, in view of the shortcomings of the prior art.

[0004] To achieve the purpose, the technical solution adopted by the utility model is:

[0005] An oil seal mounting structure comprises a shaft, a shell and a mounting hole on the shell, wherein the shaft is inserted into the mounting hole, an oil seal body is sleeved on the shaft, the oil seal body seals between the shaft and the mounting hole, an oil seal anti-retraction groove is formed on the hole wall of the mounting hole, and the oil seal anti-retraction groove is located on the outer side of the outer peripheral surface of the oil seal body.

[0006] As a further optimization of the above technical solution: a positioning block is further provided between the shaft body and the mounting hole, and the positioning block contacts the oil seal body and positions the installation of the oil seal body.

[0007] As a further optimization of the above technical solution: the positioning block includes a retaining ring sleeved on the shaft body, a retaining ring groove is formed on the hole wall of the mounting hole, the retaining ring is located in the retaining ring groove, and the retaining ring is in contact with the oil seal body.

[0008] As a further optimization of the above technical solution: the positioning block includes a positioning stopper, the hole wall of the mounting hole protrudes inwardly to form the positioning stopper, and the positioning stopper is in contact with the oil seal body.

[0009] Compared with the prior art, the utility model is provided with an oil seal anti-recognition groove which can adjust the air pressure. When the air pressure inside the shell is too high, the oil seal anti-recognition groove plays a role of buffering and regulation, making the air pressure inside and outside the shell more balanced, preventing the oil seal body from popping out due to excessive air pressure, ensuring the stable installation of the oil seal body, ensuring the reliability of the seal, reducing leakage, and thus ensuring the normal operation of the internal structure of the shell; a retaining ring and a positioning block are provided to position the installation of the oil seal body to ensure that the oil seal body is installed in place. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.

[0011] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at point A in the middle. DETAILED DESCRIPTION

[0012] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations. Figure 1-2 As shown, an oil seal mounting structure includes a shaft body 3, a shell body 8 and a mounting hole 83 located on the shell body 8, the shaft body 3 is inserted into the mounting hole 83, an oil seal body 33 is sleeved on the shaft body 3, the oil seal body 33 seals between the shaft body 3 and the mounting hole 83, an oil seal back-stop groove 86 is formed on the hole wall of the mounting hole 83, and the oil seal back-stop groove 86 is located on the outside of the outer peripheral surface of the oil seal body 33.

[0013] The oil seal anti-retraction groove 86 plays a role in regulating the air pressure; when the oil seal body 33 is installed, the excessive air pressure inside the shell 8 will pop out the oil seal body 33; and if an oil seal anti-retraction groove 86 that can adjust the air pressure is provided, when the air pressure inside the shell 8 is too high, the oil seal anti-retraction groove 86 plays a role of buffering and regulation, so that the air pressure inside and outside the shell 8 is more balanced, preventing the oil seal body 33 from popping out due to excessive air pressure, ensuring that the oil seal body 33 is installed stably, ensuring reliable sealing, reducing leakage, and thus ensuring the normal operation of the internal structure of the shell 8.

[0014] In the above technical solution: a positioning block is also provided between the shaft body 3 and the mounting hole 83, the positioning block contacts the oil seal body 33 and positions the installation of the oil seal body 33 to ensure that the oil seal body 33 is installed in place. The positioning block includes a retaining ring 32 sleeved on the shaft body 3, a retaining ring groove is formed on the hole wall of the mounting hole 83, the retaining ring 32 is located in the retaining ring groove, and the retaining ring 32 contacts the oil seal body 33. The positioning block may also include a positioning stopper, the hole wall of the mounting hole 83 protrudes inward to form a positioning stopper, and the positioning stopper contacts the oil seal body 33. The positioning stopper and the retaining ring 32 are respectively located on both sides of the oil seal body 33.

[0015] The preferred specific embodiments of the present utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the present utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the present utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should fall within the protection scope of the present utility model.

Claims

1. An oil seal installation structure, comprising a shaft (3), a housing (8) and a mounting hole (83) located on the housing (8), wherein the shaft (3) is inserted into the mounting hole (83), an oil seal body (33) is sleeved on the shaft (3), and the oil seal body (33) seals between the shaft (3) and the mounting hole (83), characterized in that An oil seal anti-retraction groove (86) is formed on the hole wall of the mounting hole (83), and the oil seal anti-retraction groove (86) is located outside the outer peripheral surface of the oil seal body (33).

2. The oil seal installation structure according to claim 1, characterized in that A positioning block is also provided between the shaft body (3) and the mounting hole (83), and the positioning block contacts the oil seal body (33) and positions the installation of the oil seal body (33).

3. The oil seal installation structure according to claim 2, characterized in that The positioning block comprises a retaining ring (32) sleeved on the shaft body (3), a retaining ring groove is formed on the hole wall of the mounting hole (83), the retaining ring (32) is located in the retaining ring groove, and the retaining ring (32) is in contact with the oil seal body (33).

4. An oil seal installation structure according to claim 2 or 3, characterized in that The positioning block comprises a positioning stopper, the hole wall of the mounting hole (83) protrudes inwardly to form the positioning stopper, and the positioning stopper is in contact with the oil seal body (33).

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