Oil seal protective sleeve with oil delivery function

Abstract

The utility model discloses an oil seal protective sleeve with an oil delivery function, which comprises a protective sleeve body, the protective sleeve body is abutted against an oil seal of a shell, and the shell is sequentially provided with a differential half shaft hole, an oil seal main lip and an oil seal side lip along the axial outward direction of the oil seal. An abutting part, a leakage-proof part and a dust-proof part are sequentially arranged on the protective sleeve body in the outward direction in the axial direction of the oil seal, and the abutting part is in interference fit with a differential mechanism half shaft hole so as to resist the impact force of oil liquid on the protective sleeve body in the transportation process; the leakage-proof part is in interference fit with the oil seal main lip; and the dustproof part, the shell and the oil seal side lip are encircled to form a closed cavity structure. Through the interference fit between the matching rib of the abutting part and the differential half axle hole, the interference fit between the leakage-proof part and the oil seal main lip, and the enclosure of the dustproof part, the shell and the oil seal side lip to form a closed cavity structure, the protective sleeve does not fall off in the transportation process, oil leakage is effectively prevented, and the requirement for the oil delivery function is met.

Description

Technical Field

[0001] The utility model relates to the technical field of protective sleeves, in particular to an oil seal protective sleeve that meets the function of delivering goods with oil. Background Art

[0002] In existing mechanical devices such as engines, gearboxes, differentials, etc. on vehicles and engineering machinery, in order to prevent the lubricating oil on the drive shaft from leaking from the inside to the outside of the device housing during operation, an oil seal protective sleeve is usually installed at the portion where the drive shaft extends outside the housing to avoid leakage of the lubricating oil.

[0003] In order to prevent the oil seal lip from being damaged and the sealing effect from being affected during the handling and transfer of the above-mentioned mechanical device, Chinese invention patent CN115217974A discloses an oil seal protection structure and an oil seal assembly. The oil seal protection structure is used to be respectively penetrated through the housing mounting port and the oil seal lip, and includes a shielding portion, a venting portion and a connecting portion distributed in sequence from the outside to the inside, wherein: the shielding portion is exposed from the housing and covers the oil seal lip; the outer diameter of the venting portion is smaller than the inner diameter of the oil seal, and an air flow channel is formed between the outer wall of the venting portion and the inner wall of the oil seal; the connecting portion and the inner wall of the oil seal are interference fit. It can be seen that the oil seal protective cover and the differential are clearance fit, that is, the support and clamping force are provided only by the interference with the oil seal lip to prevent the protective cover from falling off during transportation. This structural design is only applicable to reducers shipped without oil.

[0004] With the increase in market demand, if the existing oil seal protective cover structure is used in the reducer shipped with oil, it will cause the leakage of lubricating oil during transportation, thus causing losses; at the same time, the protective cover may fall off during transportation, causing external pollutants to enter the box, resulting in the reducer's cleanliness not meeting the requirements. Utility Model Content

[0005] The technical problem to be solved by the utility model is how to design an oil seal protective sleeve that meets the function of delivering goods with oil.

[0006] In order to solve the above technical problems, the utility model provides an oil seal protective sleeve that meets the function of shipping with oil, including a protective sleeve body, the protective sleeve body abuts against the oil seal of a shell, the shell is provided with a differential half-shaft hole, an oil seal main lip and an oil seal side lip in sequence along the axial outward direction of the oil seal, and the protective sleeve body is provided with an abutment portion, a leak-proof portion and a dust-proof portion in sequence along the axial outward direction of the oil seal, wherein:

[0007] The abutment portion is interference-fitted with the differential half-shaft hole to resist the impact force of the oil on the protective cover body during transportation;

[0008] The anti-leakage portion is interference-fitted with the main lip of the oil seal;

[0009] The dustproof part, the shell body and the oil seal side lip are surrounded to form a closed cavity structure.

[0010] Furthermore, the protective cover body also includes a handle, and the handle is in contact and fixed with the end surface of the dustproof part.

[0011] Furthermore, a side wall of the abutting portion is axially provided with a matching rib, and the matching rib has no contact with the main lip of the oil seal.

[0012] Furthermore, the matching rib is interference fit with the differential half-shaft hole.

[0013] Furthermore, the contact surface between the matching rib and the differential half-shaft hole is provided with a rounded corner.

[0014] Furthermore, an abutment plate is provided in the radial cross section of the free end of the abutment portion.

[0015] Furthermore, the contact positions between the protective sleeve body and the oil seal are both provided with rounded transitions.

[0016] Furthermore, the diameter of the leak-proof portion is 1.2-1.5 times the diameter of the abutting portion.

[0017] Furthermore, the abutting portion, the leak-proof portion, the dust-proof portion and the handle are an integrally formed injection-molded structure.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model forms a closed cavity structure through the interference fit of the matching rib of the abutment part and the differential half-shaft hole, the interference fit of the leak-proof part and the main lip of the oil seal, and the surrounding arrangement of the dust-proof part, the shell body and the side lip of the oil seal, so that the protective cover will not fall off during transportation and oil leakage is effectively prevented, thereby meeting the demand for oil-carrying delivery function. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the oil seal protective sleeve disclosed in the embodiment of the utility model;

[0021] Figure 2 The figure is a schematic diagram of assembling the oil seal protective sleeve disclosed in the embodiment of the utility model.

[0022] In the figure:

[0023] 100, protective cover body; 110, abutment portion; 111, matching rib; 112, abutment plate; 120, leak-proof portion; 130, dust-proof portion; 140, handle;

[0024] 200, housing; 210, differential half-shaft hole; 220, oil seal main lip; 230, oil seal side lip. DETAILED DESCRIPTION

[0025] In order to make the technical scheme and technical effect of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments.

[0026] The utility model aims to provide an oil seal protective cover that meets the function of delivering goods with oil, so that the protective cover will not fall off during transportation and can effectively prevent oil leakage, thereby meeting the demand of the function of delivering goods with oil.

[0027] refer to Figure 1 and Figure 2 The utility model mainly includes a protective cover body 100, which is in contact with the oil seal of a housing 200. The housing 200 is provided with a differential half-shaft hole 210, an oil seal main lip 220 and an oil seal side lip 230 in sequence along the axial outward direction of the oil seal. The housing 200 is the outer shell of the mechanical device, and the oil seal of the housing 200 is generally an annular structure. The protective cover body 100 is provided with an abutment portion 110, a leak-proof portion 120, a dust-proof portion 130 and a handle in sequence along the axial outward direction of the oil seal. The following is a detailed introduction:

[0028] The abutment portion 110 extends to the inner side of the oil seal of the housing 200, and the abutment portion 110 is interference fit with the differential half-shaft hole 210. Further, the side wall of the abutment portion 110 is axially provided with a matching rib 111, and the matching rib 111 and the oil seal main lip 220 are designed with a large gap, so that the matching rib 111 and the oil seal main lip 220 have no contact during the installation process, that is, the matching rib 111 will not scratch the main lip 220, thereby avoiding damage to the oil seal main lip 220. The contact surface between the matching rib 111 and the differential half-shaft hole 210 is provided with a rounded corner. The advantage of such a design is that if there is an error during operation, damage to the oil seal main lip 220 is avoided as much as possible. The matching rib 111 is interference fit with the differential half-shaft hole 210, and the radial cross section of the free end of the abutment portion 110 is provided with an abutment plate 112. The purpose of such a design is to resist the impact force of the shaking oil on the protective cover body 100 during the transportation or transfer process, prevent the oil seal protective cover from falling off, and effectively increase the reliability of the oil seal protective cover.

[0029] The leak-proof part 120 is interference-fitted with the main lip 220 of the oil seal. The advantage of this design is that it can effectively prevent the entry of pollutants and effectively prevent the oil leakage inside the reduction gearbox. The diameter of the leak-proof part 120 is 1.2-1.5 times the diameter of the abutment part 110, and the end surface of the leak-proof part 120 and its side wall are also provided with a rounded transition. This design is also to avoid damaging the main lip 220 of the oil seal as much as possible.

[0030] The dustproof part 130 is exposed outside the shell 200, and the dustproof part 130, the shell 200, and the oil seal side lip 230 are surrounded to form a closed cavity structure. The end face of the dustproof part 130 is also provided with an abutment plate 112, which can effectively enhance the dustproof performance of the oil seal protective cover.

[0031] The handle 140 is fixedly contacted with the end surface of the dustproof part 130, and the handle 140 is provided with a perforation for easy force application. The purpose of designing the handle 140 is to facilitate the removal of the oil seal protective sleeve. The design structure of the handle 140 is not unique, and it is only used as an example here, and is not limited.

[0032] The abutment portion 110, the leak-proof portion 120, the dust-proof portion 130 and the handle 140 are an integrally formed injection molding structure, which can improve production efficiency and save assembly steps. The contact position between the protective cover body 100 and the oil seal is provided with a rounded transition to avoid damage to the main lip 220 of the oil seal during operation as much as possible, and to facilitate the flow molding of the material during injection molding.

[0033] When installing the oil seal protective cover, the operator holds the handle 140, aligns the matching rib 111 with the differential half-shaft hole 210, and then applies force to the handle 140, so that the protective cover body 100 penetrates into the oil seal 20 and respectively has an interference fit with the quasi-differential half-shaft hole 210 and the oil seal main lip 220. When the end surface of the dustproof part 130 abuts against the housing 200, the installation is completed.

[0034] When the oil seal protective sleeve is disassembled, the operator holds the handle 140 and directly pulls the protective sleeve body 100 out of the oil seal along the axial direction.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil seal protective sleeve that meets the function of shipping with oil, comprising a protective sleeve body (100), the protective sleeve body (100) abutting against the oil seal of a housing (200), the housing (200) being provided with a differential half-shaft hole (210), an oil seal main lip (220) and an oil seal side lip (230) in sequence along the axial direction outward of the oil seal, characterized in that: The protective sleeve body (100) is provided with an abutment portion (110), a leak-proof portion (120) and a dust-proof portion (130) in sequence along the axial outward direction of the oil seal, wherein: The abutment portion (110) is interference-fitted with the differential half-shaft hole (210) to resist the impact force of oil on the protective cover body (100) during transportation; The anti-leakage portion (120) is interference-fitted with the oil seal main lip (220); The dustproof portion (130), the housing (200) and the oil seal side lip (230) are arranged to form a closed cavity structure.

2. The oil seal protective sleeve that meets the function of shipping with oil according to claim 1 is characterized in that: The protective cover body (100) further comprises a handle (140), and the handle (140) is in contact and fixed with the end surface of the dustproof part (130).

3. The oil seal protective sleeve that meets the function of shipping with oil according to claim 1 is characterized in that: A matching rib (111) is axially arranged on the side wall of the abutting portion (110), and the matching rib (111) has no contact with the main lip (220) of the oil seal.

4. The oil seal protective sleeve that meets the function of shipping with oil according to claim 3 is characterized in that: The matching rib (111) is interference-fitted with the differential half-shaft hole (210).

5. The oil seal protective sleeve that meets the function of shipping with oil according to claim 3 is characterized in that: The contact surface between the matching rib (111) and the differential half-shaft hole (210) is provided with a rounded corner.

6. The oil seal protective sleeve that meets the function of shipping with oil according to claim 1 is characterized in that: A radial cross section of the free end of the abutment portion (110) is provided with an abutment plate (112).

7. The oil seal protective sleeve that meets the function of shipping with oil according to claim 1 is characterized in that: The contact positions between the protective sleeve body (100) and the oil seal are both provided with rounded corner transitions.

8. The oil seal protective sleeve that meets the function of shipping with oil according to claim 1 is characterized in that: The diameter of the leak-proof portion (120) is 1.2-1.5 times the diameter of the abutting portion (110).

9. The oil seal protective sleeve that meets the function of shipping with oil according to claim 2 is characterized in that: The abutting portion (110), the leak-proof portion (120), the dust-proof portion (130) and the handle (140) are integrally formed injection-molded structures.

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