Motor shaft end oil seal structure

Abstract

The utility model discloses a motor shaft end oil seal structure, which is applied to a motor, an oil seal is arranged between a shaft outlet part of a motor casing and a shaft end of a rotating shaft, the motor shaft end oil seal structure also comprises an oil seal cover arranged at the end part of the shaft outlet part of the motor, and the oil seal cover is positioned on the outer side of the oil seal; the shaft end penetrates through the oil seal cover, and grease is filled between the oil seal cover and the end portion of the shaft outlet portion and between the oil seal cover and the shaft end. According to the motor shaft end oil seal structure, the oil seal cover is arranged, so that the inner side of the oil seal cover is fully coated with grease, gaps between the oil seal cover and the shaft outlet part and between the oil seal cover and the shaft end can be filled, water and dust can be isolated, and the risk that water and impurities enter the oil seal is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor lubricating grease dustproof technical field, especially a motor shaft end oil seal structure. BACKGROUND

[0002] Lubricating oil plays a vital role in the motor, it can reduce the friction and wear between bearings and other moving parts, while providing rust protection, prolonging the service life of the motor, ensuring the normal operation of the motor and the environment clean, need in the motor shell out shaft position sets up oil seal, can effectively prevent internal lubricating oil from spilling due to high speed rotation.

[0003] In the prior art, the oil seal structure of CN 214255956 U and the like is generally used to prevent lubricating oil from spilling, but for the motor in a harsh environment, water and dust have the risk of entering the oil seal, and if the water pressure outside the motor is large, the oil seal rubber is easy to deform, and water may enter the sealing lip of the oil seal with impurities. UTILITY MODEL CONTENTS

[0004] The purpose of the application is to overcome the deficiencies in the prior art, and provide a motor shaft end oil seal structure with good waterproof and dustproof effects and convenient disassembly.

[0005] Technical scheme: In order to achieve the above purpose, the motor shaft end oil seal structure of the utility model is applied to a motor, an oil seal is arranged between the shaft outlet part of the motor shell and the shaft end of the rotating shaft, further comprising an oil seal cover installed at the end of the shaft outlet part of the motor, the oil seal cover is located on the outside of the oil seal, the shaft end penetrates through the oil seal cover, and the end part of the shaft outlet part and the oil seal cover and the shaft end are filled with oil.

[0006] Further, the oil seal cover has a ring piece part and a ring cylinder part located on the inside of the ring piece part, the outer edge position of the ring piece part has an axial flange, the end surface of the shaft outlet part has a first ring groove for embedding the axial flange, and the inside of the ring cylinder part has an inwardly protruding radial flange, and the shaft end has a second ring groove corresponding to the radial flange.

[0007] Further, the radial flange is located at the outward end of the ring cylinder part.

[0008] Further, the ring piece part is located in the middle of the ring cylinder part, and the inward end of the ring cylinder part extends inwardly into the shaft outlet part.

[0009] Further, the shaft end has a thick shaft section and a thin shaft section, and the second ring groove is located at the transition position of the thick shaft section and the thin shaft section; the ring cylinder part is sleeved at the end of the thick shaft section, and the radial flange is abutted on the end face of the thick shaft section.

[0010] Further, the ring piece part and the end face of the shaft outlet part have gaps therebetween, and the gaps are filled with lubricating grease.

[0011] Further, the inner and outer sides of the axial flange have gaps between the inner and outer walls of the first ring groove, and the gaps are filled with lubricating grease.

[0012] Further, the oil seal cover is made of plastic.

[0013] Beneficial effects: the motor shaft end oil seal structure has the following beneficial effects:

[0014] (1) the motor shaft end oil seal structure sets the oil seal cover, so that the inner side of the oil seal cover is full of grease, the gap between the oil seal cover and the shaft outlet part and the shaft end can be compensated, water and dust can be isolated, and the risk of water and impurities entering the oil seal can be greatly reduced.

[0015] (2) the oil seal cover and the flange-groove structure of the shaft outlet part and the shaft end cooperate with the grease to effectively block water and dust, prevent dust from entering the oil seal cover, and effectively prevent.

[0016] (2) the oil seal cover can be connected with the end face of the shaft outlet part under the adhesion of the lubricating grease, without the need for separately setting a connecting structure, and is convenient to disassemble and assemble. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a sectional view of the motor shaft end oil seal structure;

[0018] Figure 2 is Figure 1 an enlarged structure diagram of part A.

[0019] In the figure: 1-shaft outlet part; 11-first ring groove; 2-oil seal cover; 21-ring piece part; 22-ring cylinder part; 23-axial flange; 24-radial flange; 3-shaft end; 31-second ring groove; 32-thick shaft section; 33-thin shaft section; 4-oil seal. DETAILED DESCRIPTION

[0020] The utility model will be further described in connection with the drawings.

[0021] For example, Figure 1The motor shaft end oil seal structure is applied to a motor, and an oil seal 4 is arranged between an outgoing shaft part 1 of a motor shell and a shaft end 3 of a rotating shaft. The motor shaft end oil seal structure further comprises an oil seal cover 2 installed at an end of the outgoing shaft part 1 of the motor, and the oil seal cover 2 is located at an outer side of the oil seal 4. The shaft end 3 penetrates through the oil seal cover 2, and the oil seal cover 2 and the shaft end 3 are filled with oil.

[0022] Preferably, the oil seal cover 2 has a ring piece part 21 and a ring cylinder part 22 arranged at an inner side of the ring piece part 21. An outer edge of the ring piece part 21 is provided with an axial flange 23. An end surface of the outgoing shaft part 1 is provided with a first ring groove 11 for embedding the axial flange 23. An inner side of the ring cylinder part 22 is provided with an inwardly protruding radial flange 24. The shaft end 3 is provided with an inwardly recessed second ring groove 31 corresponding to the radial flange 24.

[0023] The second ring groove 31 is filled with oil, and the oil seal cover 2 can be tightly fitted with the shaft end 3 to rotate together with the shaft end 3.

[0024] With the above structure, the oil seal cover 2 cooperates with the flange-groove structure of the outgoing shaft part 1 and the shaft end 3 to effectively prevent dust and moisture from entering.

[0025] The radial flange 24 is located at an outward end of the ring cylinder part 22. The ring piece part 21 is located at a middle part of the ring cylinder part 22, and an inward end of the ring cylinder part 22 extends inwardly into the outgoing shaft part 1. In this way, the inward end of the ring cylinder part 22, the ring piece part 21 and the axial flange 23 form a C-shaped cross section, which can effectively prevent moisture and impurities from entering.

[0026] The shaft end 3 has a thick shaft section 32 and a thin shaft section 33, and the second ring groove 31 is located at a transition position between the thick shaft section 32 and the thin shaft section 33. The ring cylinder part 22 is sleeved at an end of the thick shaft section 32, and the radial flange 24 abuts against an end surface of the thick shaft section 32. With this structure, it can effectively prevent moisture from entering the gap between the shaft end 3 and the oil seal cover 2.

[0027] The ring piece part 21 and the end surface of the outgoing shaft part 1 have a gap therebetween, and the gap is filled with lubricating grease. The inner and outer sides of the axial flange 23 and the inner and outer walls of the first ring groove 11 have gaps therebetween, and each gap is filled with lubricating grease. In this way, the oil seal cover 2 can be connected to the end surface of the outgoing shaft part 1 under the adhesion of the lubricating grease, and a separate connection structure is not needed, which facilitates disassembly and assembly. The oil seal cover 2 is in a suspended state, and does not increase the running resistance.

[0028] The above merely is the preferred implementation form of the present application, and it should be noted that for the ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A motor shaft end oil seal structure applied to a motor, an oil seal (4) being arranged between an outgoing shaft part (1) of a motor housing and a shaft end (3) of a rotating shaft, characterized in that, The oil seal cover (2) is installed on the end of the shaft part (1) of the motor, and is located outside the oil seal (4); the shaft end (3) passes through the oil seal cover (2), and the oil seal cover (2) and the end of the shaft part (1) and the oil seal cover (2) and the shaft end (3) are filled with oil.

2. The motor shaft end oil seal structure of claim 1, wherein The oil seal cover (2) has a ring piece part (21) and a ring cylinder part (22) located inside the ring piece part (21); the outer edge of the ring piece part (21) has an axial flange (23); the end surface of the shaft part (1) has a first ring groove (11) for embedding the axial flange (23); the inside of the ring cylinder part (22) has an inwardly protruding radial flange (24); the shaft end (3) has a second ring groove (31) corresponding to the position of the radial flange (24).

3. The motor shaft end oil seal structure of claim 2, wherein The radial flange (24) is located at the outward end of the ring cylinder part (22).

4. The motor shaft end oil seal structure of claim 3, wherein The ring piece part (21) is located in the middle of the ring cylinder part (22), and the inward end of the ring cylinder part (22) extends inwardly into the shaft part (1).

5. The motor shaft end seal structure of claim 2, wherein The shaft end (3) has a thick shaft section (32) and a thin shaft section (33), and the second ring groove (31) is located at the transition position of the thick shaft section (32) and the thin shaft section (33); the ring cylinder part (22) is sleeved on the end of the thick shaft section (32), and the radial flange (24) abuts against the end surface of the thick shaft section (32).

6. The motor shaft end oil seal structure of claim 5, wherein The ring piece part (21) and the end surface of the shaft part (1) have a gap therebetween, and the gap is filled with lubricating grease.

7. The motor shaft end seal structure of claim 5, wherein The inner and outer sides of the axial flange (23) have gaps with the inner and outer walls of the first ring groove (11) respectively, and each gap is filled with lubricating grease.

8. The motor shaft end seal structure of claim 1, wherein The oil seal cover (2) is made of plastic.

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