A motor oil seal mounting structure

Abstract

The utility model discloses a motor oil seal mounting structure belongs to motor technical field, including motor outer cover, the motor outer cover is rotationally connected with the pivot in, is provided with the bearing chamber in the motor outer cover, is rotationally connected with the bearing in the bearing chamber, is provided with the inner cover in the bearing chamber outside one side, is provided with the oil seal ring between the inner cover and the bearing, is provided with a plurality of muscle mouth on the oil seal ring along the circumferential direction, can help oil seal quick positioning and prevent rotation or eccentricity in the installation process, promotes the installation efficiency and operating stability, after the grease is extruded, the grease solution can be arranged to the inner cover space along the muscle mouth channel, then is arranged to export through the grease hole on the inner cover, thereby realizes the automatic renewal, avoids the old grease stagnation, the hardening even the blockage lubrication channel, is helpful to prolong the bearing life, keeps the smooth operation.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically a motor oil seal installation structure. Background Technology

[0002] Motor bearings require continuous lubrication during long-term operation to maintain their stability and service life. Oil seals, as a crucial sealing component in the bearing lubrication system, primarily prevent grease leakage and the intrusion of external impurities. Traditional oil seals are typically made of rubber, with a complete annular inner circle. During installation, they are interference-fitted or tightly fitted to the motor shaft, achieving axial sealing and radial fixation through radial compression. These oil seals are widely used in rotating equipment such as motor bearing housings, gearboxes, and reducers, possessing good sealing performance and effectively suppressing grease leakage to a certain extent.

[0003] Utility model patent CN211351913U discloses a noise-reducing and dust-proof ATM machine drive motor bearing, comprising a bearing ring, a bearing housing, a sealing ring, and a dustproof gasket. The bearing housing is located inside the bearing ring, an oil seal is located inside the bearing housing, a sealing ring is located inside the oil seal, a bearing retainer is located inside the sealing ring, and a motor shaft is located within the bearing retainer. An oil nozzle is located between the oil seal and the sealing ring, and a nylon retainer is located below the oil nozzle. A first ball is located on the outer side of the nylon retainer, and a second ball is located on the inner side of the nylon retainer. A washer is located at the bottom of the nylon retainer, and a cavity is located at the bottom of the washer. Sound-absorbing cotton is evenly distributed within the cavity, and a dustproof gasket is located at the bottom of the cavity. This invention solves the problems of unsatisfactory speed, easy failure, and noise in existing ATM motor drive bearings; it aims to increase the motor bearing speed, reduce the noise emitted during bearing rotation, improve bearing efficiency, and extend bearing service life.

[0004] However, in the above structure, the inner circle of the oil seal is a complete circle, and the inner circle is radially fixed to the shaft. There is no gap between the oil seal and the shaft. Since the bearing cannot use an internal seal, as the motor runs for a longer period of time, some of the grease in the bearing evaporates and some of the grease ages and needs to be discharged. The bearing needs to be filled with new grease, but since there is no gap between the oil seal and the shaft, the aged grease cannot be discharged from the bearing, which will increase the bearing friction loss and affect the bearing operating temperature and bearing life. Utility Model Content

[0005] The purpose of this utility model is to provide a motor oil seal mounting structure to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] A motor oil seal mounting structure is provided, including a motor outer cover, a rotating shaft rotatably connected inside the motor outer cover, a bearing chamber provided inside the motor outer cover, a bearing rotatably connected inside the bearing chamber, an inner cover provided on one side outside the bearing chamber, and an oil seal ring provided between the inner cover and the bearing, the oil seal ring having a plurality of ribs along the circumferential direction.

[0007] Furthermore, a rotating ring is provided between the inner cover and the rotating shaft. When adding grease, the grease is injected from the outer cover, pushing the old grease through the oil seal ring and into the cavity between the rotating ring and the inner cover along the rib of the oil seal ring, and then guided by the rotating ring to the grease discharge hole.

[0008] Furthermore, a guide channel is formed between several of the aforementioned ribs and the bearing. Grease is injected from the motor cover, enters the bearing chamber through the guide channel and is squeezed out, and flows to the outside of the oil seal ring through the ribs. The grease can be replaced without disassembling the structure, improving maintenance efficiency and reducing the burden of manual operation.

[0009] Furthermore, the width D of several of the aforementioned ribs is 0.1-0.5mm. The ribs can control the discharge flow of grease. Through the internal pressure of the grease itself and the driving force of the new grease, the aged grease can be smoothly discharged along the ribs, ensuring the renewal of grease in the bearing cavity.

[0010] Furthermore, the outer cover of the motor is provided with a grease injection hole, which allows new grease to be injected directly without stopping the machine or without disassembling the motor. The new grease enters from the storage area of ​​the bearing chamber, then is guided into the guide channel, discharged through the grease discharge channel through the rib, and then flows out from the grease discharge hole outlet of the inner cover.

[0011] Furthermore, the inner cover of the motor is provided with a grease discharge hole, which serves as the outlet, and the two together form a complete grease flow path; new grease enters the bearing chamber through the grease injection hole, squeezing out the old grease along the guide channel and rib, and finally flows out from the grease discharge hole to the outside or a collection device, thereby realizing the dynamic renewal, directional discharge, and controllable cleaning of the lubricating grease.

[0012] Furthermore, a retaining washer is provided between the motor outer cover and the bearing. The retaining washer provides a clear installation positioning reference for the bearing, ensuring that the bearing outer ring is accurately positioned and tightly attached to the bearing cavity end face. This ensures the precise relative position of components such as the lubrication channel and oil seal ring, improving the overall assembly consistency and reliability of the motor. It is particularly suitable for high-speed motors or high-precision operation requirements.

[0013] Furthermore, the oil seal ring is configured with a clearance fit with the rotating shaft. When new grease is injected from the outer cover, it will push the old grease under pressure and flow along the gap to the rear side of the oil seal ring. It will cooperate with the rib structure on the oil seal ring to further guide the grease to the grease discharge hole, thereby realizing the dynamic replacement and automatic renewal of the grease.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In this structure, the gap between the inner ring of the oil seal and the shaft is increased. When grease is injected from the outer cover of the motor, the pressure will cause the old grease in the bearing to be discharged. The increased gap reduces the grease discharge resistance. The old grease can be smoothly discharged into the inner cover space through the ribs on the oil seal ring and discharged from the inner cover, thus realizing the automatic renewal of the lubricating medium. Several ribs are set along the circumference of the oil seal ring. These ribs serve as grease discharge paths and also have structural reinforcement and positioning functions. The rib structure forms a local fitting and pressing area with the bearing cavity or inner cover, which can help the oil seal to be quickly positioned and prevent rotation or eccentricity during installation, improving installation efficiency and operational stability. After the grease is squeezed out, the grease can be discharged into the inner cover space along the rib channel and then discharged through the grease discharge hole on the inner cover, thus realizing automatic renewal and avoiding the retention, hardening or even blockage of the lubrication channel by old grease, which helps to extend the bearing life and maintain smooth operation. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 A schematic diagram of the overall structure of an electric motor oil seal mounting structure;

[0018] Figure 2 for Figure 1 Enlarged schematic diagram of structure A in the middle;

[0019] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the motor outer cover at point A;

[0020] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure of the inner cover at point B;

[0021] Figure 5 A schematic diagram of the oil seal ring structure provided by this utility model.

[0022] In the diagram: 1. Motor outer cover; 11. Grease injection hole; 2. Shaft; 3. Bearing chamber; 4. Bearing; 5. Inner cover; 51. Grease drain hole; 6. Oil seal ring; 61. Rib; 7. Rotary ring; 8. Locking washer. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] Please see Figure 1-5 As shown in the embodiment of this utility model, a motor oil seal mounting structure includes a motor outer cover 1, a rotating shaft 2 rotatably connected inside the motor outer cover 1, a bearing chamber 3 provided inside the motor outer cover 1, a bearing 4 rotatably connected inside the bearing chamber 3, an inner cover 5 provided on one side of the bearing chamber 3, an oil seal ring 6 provided between the inner cover 5 and the bearing 4, and a plurality of ribs 61 provided on the oil seal ring 6 along the circumferential direction;

[0030] In this structure, when grease is injected from the outer cover 1 of the motor, the pressure will cause the old grease in the bearing 4 to be discharged. The increased clearance reduces the grease discharge resistance. The old grease can be smoothly discharged to the inner cover space through the ribs 61 on the oil seal ring 6, and then discharged through the inner cover 5, thereby realizing the automatic renewal of the lubricating medium. Several ribs 61 are set along the circumferential direction on the oil seal ring 6. These ribs 61 serve as grease discharge paths on the one hand, and also have structural reinforcement and positioning functions on the other hand. The structure of the ribs 61 forms a local fitting and pressing area with the bearing cavity 3 or the inner cover 5, which can help the oil seal ring 6 to be quickly positioned and prevent rotation or eccentricity during installation, thereby improving installation efficiency and operational stability. After the grease is squeezed out, the grease can be discharged to the inner cover 5 space along the rib 61 channel, and then discharged through the grease discharge hole 51 on the inner cover 5, thereby realizing automatic renewal, avoiding old grease retention, hardening or even blockage of the lubrication channel, which helps to extend the life of the bearing 4 and maintain smooth operation.

[0031] In one embodiment, see Figure 1 and Figure 2 As shown, a rotating ring 7 is provided between the inner cover 5 and the rotating shaft 2. When adding grease, the grease is injected from the outer cover, pushing the old grease through the oil seal ring 6, and entering the cavity between the rotating ring 7 and the inner cover 5 along the rib 61 of the oil seal ring 6. The grease is then guided by the rotating ring 7 to the grease discharge hole 51.

[0032] In one embodiment, see Figure 1 and Figure 3 As shown, a guide channel is formed between the rib 61 and the bearing 4. The oil seal ring 6 is provided with several ribs 61. The extension direction of the ribs 61 forms a guide channel with the bearing chamber 3. Grease is injected from the motor cover 1, enters the bearing chamber 3 through the guide channel and is squeezed out, and flows to the outside of the oil seal ring 6 through the ribs 61. The grease can be replaced without disassembling the structure, which improves maintenance efficiency and reduces the burden of manual operation.

[0033] In one embodiment, see Figure 1 and Figure 2 As shown, several ribs 61 with a width D of 0.1-0.5 mm are provided. The ribs 61 with a width of 0.1-0.5 mm can control the discharge flow of grease. Through the internal pressure of the grease itself and the driving force of the new grease, the aged grease can be smoothly discharged along the ribs 61, ensuring the renewal of grease in the bearing chamber 3.

[0034] In one embodiment, see Figure 1 and Figure 2 As shown, the outer cover 1 of the motor is provided with a grease injection hole 11. The grease injection hole 11 allows new grease to be injected directly without stopping the machine or without disassembling the motor. The new grease enters from the storage area of ​​the bearing chamber 3, then is guided into the guide channel, passes through the rib 61 and is discharged from the grease discharge channel, and then flows out from the grease discharge hole 51 of the inner cover 5.

[0035] In one embodiment, see Figure 1 and Figure 2 As shown, the inner cover 5 is provided with a grease discharge hole 51. The grease injection hole 11 is the inlet and the grease discharge hole 51 is the outlet. The two form a complete grease flow path. New grease enters the bearing chamber 3 through the grease injection hole 11, and the old grease is squeezed out along the guide channel and the rib 61. Finally, it flows out from the grease discharge hole 51 to the outside or the collection device, realizing the dynamic renewal, directional discharge and controllable cleaning of the lubricating grease.

[0036] In one embodiment, see Figure 1 and Figure 2 As shown, a retaining washer 8 is also provided between the motor outer cover 1 and the bearing 4. During the installation process, the retaining washer 8 provides an installation positioning reference for the bearing 4, ensuring that the outer ring of the bearing 4 is accurately positioned and tightly attached to the end face of the bearing chamber 3. This ensures the precise relative position of components such as the lubrication channel and oil seal ring 6, improving the overall assembly consistency and reliability of the motor. It is especially suitable for high-speed motors or high-precision operation requirements.

[0037] In one embodiment, see Figure 1 and Figure 2 As shown, the oil seal ring 6 is fitted with the rotating shaft 2 with a clearance. When new grease is injected from the outer cover, it will push the old grease under pressure and flow along the gap to the rear side of the oil seal ring. It will cooperate with the rib 61 structure on the oil seal ring 6 to further guide the grease to the grease discharge hole 51, thereby realizing the dynamic replacement and automatic renewal of the grease.

[0038] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A motor oil seal mounting structure, comprising a motor outer cover (1), characterized in that, The motor outer cover (1) is rotatably connected to a rotating shaft (2), the motor outer cover (1) is provided with a bearing chamber (3), the bearing chamber (3) is rotatably connected to a bearing (4), the bearing chamber (3) is provided with an inner cover (5) on one side outside the bearing chamber (3), an oil seal ring (6) is provided between the inner cover (5) and the bearing (4), and the oil seal ring (6) is provided with several ribs (61) along the circumferential direction.

2. The motor oil seal mounting structure according to claim 1, characterized in that, A rotating ring (7) is provided between the inner cover (5) and the rotating shaft (2).

3. The motor oil seal mounting structure according to claim 2, characterized in that, A flow channel is formed between several of the aforementioned ribs (61) and the bearing (4).

4. The motor oil seal mounting structure according to claim 1, characterized in that, The width D of several of the aforementioned ribs (61) is 0.1-0.5 mm.

5. The motor oil seal mounting structure according to claim 1, characterized in that, The motor cover (1) is provided with a grease injection hole (11).

6. The motor oil seal mounting structure according to claim 1, characterized in that, The inner cover (5) of the motor is provided with a grease drain hole (51).

7. The motor oil seal mounting structure according to claim 1, characterized in that, A retaining washer (8) is also provided between the motor cover (1) and the bearing (4).

8. The motor oil seal mounting structure according to claim 1, characterized in that, The oil seal ring (6) is fitted with the rotating shaft (2) with a clearance fit.

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