Oil return gasket and motor oil return rotating shaft support

Abstract

The utility model discloses an oil return gasket and a motor oil return rotating shaft support, the side wall of the oil return gasket is provided with a plurality of through grooves around a central shaft, the through grooves are communicated with two sides of the oil return gasket, and the side wall of the oil return gasket is provided with a plurality of elastic arms around the central shaft; the elastic arm protrudes in the direction of one side of the oil return gasket. According to the utility model, lubricating oil can be quickly supplemented into the oil-retaining bearing, the operation stability of the rotor is ensured, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The utility model relates to a motor, in particular to an oil return gasket and a motor oil return shaft bracket. Background Art

[0002] The shaded-pole motor has the advantages of being small and beautiful, compact in structure, easy to maintain, with low starting torque, low noise and low vibration, and is widely used in household appliances and industrial fields. The rotor shaft of the existing shaded-pole motor is rotatably arranged on the stator core through a bracket. In order to make the shaft rotate more smoothly, an oil-containing bearing is usually arranged between the shaft and the bracket, so that the friction of the shaft is small and the energy consumption is lower when it rotates. However, during the rotation of the bearing, due to the action of centrifugal force, the lubricating oil may be thrown out from the edge of the bearing, and then return again under the obstruction of the pressure cover. However, during the return process, due to the obstruction of the internal elastic gasket, it is difficult for the lubricating oil to return quickly, which can easily cause the oil-containing bearing to be short of oil, and the friction between the bearing and the bracket will increase, which is easy to wear, thereby making the operation of the rotor unstable and shortening the service life of the motor. Utility Model Content

[0003] The utility model aims to provide an oil return washer which can quickly replenish lubricating oil to the inside of an oil-containing bearing, ensure the running stability of a rotor and prolong the service life of a motor.

[0004] Another object of the utility model is to provide a motor oil return shaft bracket which can quickly replenish lubricating oil to the inside of the oil-containing bearing, ensure the running stability of the rotor, and extend the service life of the motor.

[0005] In order to achieve the above-mentioned purpose, the side wall of the oil return gasket provided by the utility model is provided with a plurality of through grooves connecting its two sides around the central axis, and the side wall of the oil return gasket is provided with a plurality of elastic arms around the central axis; the elastic arms protrude toward one side of the oil return gasket.

[0006] Compared with the prior art, the utility model has a plurality of elastic arms on the side wall of the oil return gasket around the central axis, so that the oil return gasket has an elastic force. In addition, the side wall of the oil return gasket has a plurality of through grooves connected to both sides around the central axis, so that the lubricating oil accumulated in the gland can be easily returned to the oil-containing bearing through the through grooves of the oil return gasket, thereby ensuring that the lubricating oil can be quickly replenished to the inside of the oil-containing bearing, ensuring the stability of the operation of the oil-containing bearing and the rotor, preventing the oil-containing bearing from being worn, and extending the service life of the motor.

[0007] Preferably, the through groove is an arc-shaped structure.

[0008] Preferably, the elastic arm has an arc-shaped structure.

[0009] Preferably, a plurality of notches are formed around the central axis on the outer peripheral edge of the oil return gasket, and the notches are connected to the through grooves in a one-to-one correspondence, so that the outer edge of the oil return gasket forms the elastic arm.

[0010] Preferably, the diameter of the arc-shaped structure of the elastic arm is greater than the radius of the arc-shaped structure of the through groove.

[0011] Preferably, the front end of the elastic arm is bent to provide an abutment top portion.

[0012] A motor oil return shaft bracket comprises a bracket, an oil-containing bearing, an oil storage felt ring, a pressure cover and an oil return gasket, wherein a receiving cavity is provided in the bracket, the oil-containing bearing and the oil storage felt ring are rotatably arranged in the receiving cavity, and the oil storage felt ring is sleeved on the outer circumference of the oil-containing bearing; the pressure cover is arranged at the opening of the receiving cavity and covers the outer end of the oil-containing bearing; the oil return gasket is arranged between the oil storage felt ring and the pressure cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an exploded structural diagram of the motor of the present utility model.

[0014] Figure 2 It is a structural diagram of the rotating shaft bracket of the utility model.

[0015] Figure 3 It is an exploded view of the rotating shaft bracket of the utility model.

[0016] Figure 4 It is an axial cross-sectional view of the rotating shaft support of the utility model.

[0017] Figure 5 It is an axial cross-sectional view of the rotating shaft support of the utility model.

[0018] Figure 6 It is a structural diagram of the oil storage felt ring of the rotating shaft support of the utility model.

[0019] Figure 7 It is a structural diagram of another oil storage felt ring of the rotating shaft support of the utility model.

[0020] Figure 8 It is a structural diagram of the oil return gasket of the rotating shaft bracket of the utility model. DETAILED DESCRIPTION

[0021] In order to explain the technical content, structural features and achieved effects of the present invention in detail, the following is a detailed description in conjunction with the implementation modes and the accompanying drawings.

[0022] like Figure 1As shown, the motor 100 of the utility model is a shaded pole motor 100, which includes a main winding 1, a stator core 2, a rotor 3, a pair of short-circuit rings 4 and a pair of motor oil return shaft brackets 5 (hereinafter referred to as shaft brackets 5), the main winding 1 is arranged on the stator core 2, the stator core 2 has a first magnetic pole and a second magnetic pole, the shaft bracket 5 is arranged on the opposite sides of the stator core 2, the shaft 31 of the rotor 3 is arranged on the shaft bracket 5, the rotor 3 is rotatably arranged on the stator core 2 and is located between the first magnetic pole and the second magnetic pole, and the rotor 3 is located on one side of the main winding 1; one short-circuit ring 4 is arranged in a partial area of ​​the first magnetic pole, and the other short-circuit ring 4 is arranged in a partial area of ​​the second magnetic pole, and the first magnetic pole and the second magnetic pole are staggered.

[0023] See also Figures 2 to 5 The rotating shaft support 5 includes a support 51, an oil-containing bearing 52, an oil storage felt ring 53, an oil return gasket 54 and a pressure cover 55. The support 51 is provided with a receiving chamber 511. The receiving chamber 511 includes a spherical chamber 511a and an annular chamber 511b. The spherical chamber 511a and the annular chamber 511b are coaxially arranged along the axial direction of the receiving chamber 511 and are interconnected. The oil-containing bearing 52 is rotatably abutted against the spherical chamber 511a and the annular chamber 511b, and the oil-containing bearing 52 is in sliding contact with the spherical chamber 511a. The diameter of the annular chamber 511b is larger than the diameter of the oil-containing bearing 52. The oil storage felt ring 53 is sleeved on the outer periphery of the oil-containing bearing 52 and is located in the annular cavity 511b; the pressure cover 55 is arranged at the opening of the accommodating cavity 511 and covers the outer end of the oil-containing bearing 52; the oil return gasket 54 is arranged between the oil storage felt ring 53 and the pressure cover 55.

[0024] For example Figure 3 and Figure 4As shown, the middle part of the pressure cover 55 is provided with an annular depression 551 protruding outward, and the center of the annular depression 551 is provided with a central hole 552 for the rotating shaft 31 of the rotor 3 to pass through. There is a gap between the inner bottom of the annular depression 551 and the end face of the oil-containing bearing 52. By making the middle part of the pressure cover 55 protrude outward, a certain space is formed between the pressure cover 55 and the end face of the oil-containing bearing 52, which is conducive to collecting the thrown lubricating oil, thereby preventing the lubricating oil from leaking. Specifically, the inner wall 551b of the annular depression 551 is inclined toward the oil-containing bearing 52. This is conducive to guiding the lubricating oil back into the oil-containing bearing 52 and avoiding the continuous reduction of the lubricating oil in the oil-containing bearing 52. The distance L from the inner bottom of the annular depression 551 to the end face of the oil-containing bearing 52 is 2-4mm. In this way, sufficient space can be created to meet the storage of lubricating oil, and the thrown lubricating oil can be quickly replenished into the oil-containing bearing 52.

[0025] Please see again Figure 3 and Figure 4 , a sealing ring (556) is provided between the gland 55 and the annular cavity 511b. Specifically, the edge of the gland 55 has a folded edge 551c that is bent outward, and a sealing ring 556 is provided between the folded edge 551c and the annular cavity 511b. The provision of the sealing ring 556 can prevent the lubricating oil from leaking outward from the edge of the gland 55, thereby ensuring that the lubricating oil will not be reduced. The sealing ring 556 can be formed by glue, and the glue can bond and fix the gland 55 to the annular cavity 511b.

[0026] like Figure 6 As shown, a middle hole 531 is provided in the middle of the oil storage felt ring 53 for the oil-containing bearing 52 to pass through, and part of the inner wall surface of the middle hole 531 is in sliding contact with the outer wall surface of the oil-containing bearing 52. Specifically, the middle hole is a square structure, and the inner wall surfaces of each side of the square structure are in tangential contact with the outer wall surface of the oil-containing bearing 52. Since the contact area between the oil storage felt ring 53 and the oil-containing bearing 52 in the prior art is large, the oil storage felt ring 53 will supply too much oil to the oil-containing bearing 52 at the beginning, thereby accelerating the oil leakage rate; therefore, by setting the middle hole 531 to a square structure, the contact area between the oil storage felt ring 53 and the oil-containing bearing 52 can be reduced, thereby reducing the oil supply and achieving slow oil supply, which is beneficial to reducing the speed at which the lubricating oil is thrown out, extending the service life of the lubricating oil, and helping to extend the service life of the motor 100. Figure 7As shown, in another embodiment of the present application, the middle hole 531' of the oil storage felt ring 53' is circular, and the inner wall surface of the middle hole 531' is evenly provided with a plurality of recesses 532 around the central axis. By providing a plurality of recesses 532, the contact area between the oil storage felt ring 53 and the oil-containing bearing 52 can be reduced, thereby reducing the oil supply amount, achieving slow oil supply, and helping to reduce the speed at which the lubricating oil is thrown out, prolonging the use time of the lubricating oil, and helping to prolong the service life of the motor 100.

[0027] like Figure 8 As shown, the side wall of the oil return gasket 54 is provided with a plurality of through grooves 541 connecting the two sides thereof around the central axis, and the number of the through grooves 541 in this embodiment is three. The through grooves 541 are in an arc-shaped structure. The side wall of the oil return gasket 54 is provided with a plurality of elastic arms 542 around the central axis. The number of the elastic arms 542 in this embodiment is three. The elastic arms 542 are in an arc-shaped shape, and the elastic arms 542 protrude in the direction of one side of the oil return gasket 54. The diameter of the arc-shaped structure of the elastic arm 542 is greater than the radius of the arc-shaped structure of the through groove 541. Specifically, the outer peripheral edge of the oil return gasket 54 is provided with a plurality of notches 543 around the central axis, and the notches 543 are connected to the through grooves 541 in a one-to-one correspondence, so that the outer edge of the oil return gasket forms the elastic arm 542. The front end of the elastic arm 542 is bent and provided with a butt top 542a. By providing the through groove 541, the lubricating oil accumulated in the gland 55 can be easily returned to the oil-containing bearing 52 through the oil return washer 54, thereby ensuring that the lubricating oil can be quickly replenished into the oil-containing bearing 52, ensuring the stability of the operation of the oil-containing bearing 52, preventing the oil-containing bearing 52 from being worn, and extending the service life of the motor. The center of the oil return washer 54 is provided with an axial hole 544 for the rotating shaft 31 to pass through.

[0028] Compared with the prior art, the utility model provides a pressure cover 55 at the outer end of the oil-containing bearing 52, so that the pressure cover 55 covers the outer end of the oil-containing bearing 52. When the lubricating oil in the oil-containing bearing 52 is thrown out, the pressure cover 55 can prevent the lubricating oil from splashing outward, so that the lubricating oil accumulates on the side of the pressure cover 55 close to the oil-containing bearing 52, so that the lubricating oil can return to the oil-containing bearing 52 again, preventing the lubricating oil in the oil-containing bearing 52 from gradually decreasing. Therefore, it can be ensured that the oil-containing bearing 52 still has a good lubrication effect after long-term use, thereby effectively ensuring the operating stability of the rotor 3 and helping to extend the service life of the motor 100.

[0029] The structures of the stator core 2 and the rotor 3 involved in the motor 100 of the present invention are well known to those skilled in the art and will not be described in detail herein.

[0030] The above disclosure is only a preferred example of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. An oil return gasket, characterized in that: The side wall of the oil return gasket is provided with a plurality of through grooves connecting the two sides thereof around the central axis, and the side wall of the oil return gasket is provided with a plurality of elastic arms around the central axis; the elastic arms protrude toward one side of the oil return gasket.

2. The oil return gasket according to claim 1, characterized in that: The through groove is in an arc-shaped structure.

3. The oil return gasket according to claim 1, characterized in that: The elastic arm is in an arc-shaped structure.

4. The oil return gasket according to claim 1, characterized in that: The outer peripheral edge of the oil return gasket is provided with a plurality of notches around the central axis, and the notches are connected with the through grooves in a one-to-one correspondence, so that the outer edge of the oil return gasket forms the elastic arm.

5. The oil return gasket according to claim 1, characterized in that: The diameter of the arc-shaped structure of the elastic arm is greater than the radius of the arc-shaped structure of the through groove.

6. The oil return gasket according to claim 1, characterized in that: The front end of the elastic arm is bent to form an abutment top portion.

7. A motor oil return shaft bracket, comprising a bracket, an oil-containing bearing, an oil storage felt ring, a pressure cover and the oil return gasket according to any one of claims 1 to 6, wherein the bracket is provided with a accommodating cavity, the oil-containing bearing and the oil storage felt ring are rotatably arranged in the accommodating cavity, and the oil storage felt ring is sleeved on the outer periphery of the oil-containing bearing; the pressure cover is arranged at the opening of the accommodating cavity and covers the outer end of the oil-containing bearing; the oil return gasket is arranged between the oil storage felt ring and the pressure cover.

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