Dustproof sealing ring structure for motor

Abstract

The utility model discloses a dustproof sealing ring structure for a motor, which comprises a motor main body, one side of the motor main body is provided with an end cover, a first sealing ring and a second sealing ring are sleeved between the end cover and a motor shaft, the first sealing ring is clamped on the second sealing ring, the first sealing ring is provided with a first dustproof lip and a second dustproof lip, and the second sealing ring is clamped on the first sealing ring. The first dustproof lip and the second dustproof lip abut against the periphery of the motor shaft, and a dust collection groove is formed in the first sealing ring. The joint of the end cover and the motor shaft is sleeved with the first sealing ring and the second sealing ring, and the first dustproof lip and the second dustproof lip on the first sealing ring abut against the periphery of the motor shaft, so that the gap between the end cover and the motor shaft has a dual-sealing effect; the dust collection groove is formed in the first sealing ring, so that dust in surrounding air falls into the dust collection groove in the operation process of the motor, dust entering the dustproof lip is reduced, and the dustproof effect of the sealing ring is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sealing ring technical field, especially in dustproof sealing ring structure for motor. BACKGROUND

[0002] Because the rotating shaft of motor is generally set through the end cover, further result in certain gap between its rotating shaft and end cover, and when meeting the environment of more dust, need motor to have certain dustproof function, to realize the relative sealing of motor and outside environment, usually set sealing ring at the gap of rotating shaft and end cover, to be used for the sealing between rotating shaft and end cover, prevent dust from entering the inside of motor.

[0003] At present, motor usually only uses a rubber washer as dustproof sealing structure to prevent dust from penetrating into the inside of motor, but especially for the area of more dust such as cement plant, the sealing effect of single sealing ring is not very good, and dust, sand and other impurities still enter the inside of motor, further can cause the damage of motor bearing, heating, and then bearing seizure, motor burnout and other serious accidents. Therefore, aiming at the deficiency of the sealing and dustproof effect between the bearing chamber of rotating shaft and end cover of current motor, a dustproof sealing ring structure for motor is invented. SUMMARY

[0004] The utility model discloses a dustproof sealing ring structure for motor, which overcomes the deficiencies of the prior art and provides a dustproof sealing ring structure for motor.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A dustproof sealing ring structure for motor, comprising a motor body, an end cover is arranged on one side of the motor body, a motor shaft hole is formed in the end cover, a motor shaft is arranged through the motor shaft hole and extends out of the end cover, a first sealing ring and a second sealing ring are arranged between the end cover and the motor shaft, the first sealing ring is clamped on the second sealing ring, the outer periphery of the first sealing ring and the second sealing ring abuts against the side wall of the motor shaft hole, a downwardly inclined dust lip one and a dust lip two are arranged on the first sealing ring, the dust lip one and the dust lip two abut against the outer periphery of the motor shaft, and a dust collecting groove is formed in the first sealing ring.

[0007] Preferably, an annular protrusion is arranged on the bottom of the first sealing ring, an annular groove corresponding to the position of the annular protrusion is arranged on the second sealing ring, and the annular groove and the annular protrusion are clamped.

[0008] Preferably, a cavity is formed in the inner periphery of the first sealing ring, an opening is arranged on one side of the cavity, and the opening side abuts against the motor shaft.

[0009] Preferably, the cavity is provided with an elastic support member.

[0010] Preferably, the first sealing ring has an internal cavity filled with an expanding agent.

[0011] Preferably, the first sealing ring and the second sealing ring are interference-fitted onto the motor shaft.

[0012] Preferably, the contact surfaces of the first sealing ring, the second sealing ring and the outer periphery of the motor shaft are arc-shaped.

[0013] The beneficial effects of this utility model are:

[0014] 1. By installing a first sealing ring and a second sealing ring at the connection between the end cover and the motor shaft, the dustproof lips one and two on the first sealing ring abut against the outer circumference of the motor shaft, and the outer circumferences of the first and second sealing rings abut against the side wall of the motor shaft hole, the gap between the end cover and the motor shaft has a double sealing effect. By setting a dust collection groove on the first sealing ring, dust in the surrounding air during motor operation falls into the dust collection groove, reducing the amount of dust entering the dustproof lip, thereby effectively improving the dustproof effect of the sealing ring and preventing dust from entering the motor and causing motor failure.

[0015] 2. By creating a cavity inside the first sealing ring and filling the cavity with an expanding agent, the expanding agent expands due to heat when the motor is running, causing the first sealing ring to expand and tightly fit the sealing ring with the motor shaft. This solves the problem of the sealing ring easily falling off during motor operation, thereby improving the sealing effect of the sealing ring and preventing dust from entering the motor. Attached Figure Description

[0016] Figure 1 The three-dimensional representation of this utility model Figure 1 ;

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 This is an exploded view of the end cap of this utility model;

[0019] Figure 4 This is a cross-sectional view of the end cap of this utility model;

[0020] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0021] Figure 6 for Figure 5 Enlarged diagram of point C in the middle.

[0022] In the figure: motor body 1, end cover 2, motor shaft hole 21, motor shaft 3, first sealing ring 4, dustproof lip one 41, dustproof lip two 42, dust collection groove 43, annular protrusion 44, second sealing ring 5, annular groove 51, cavity 6, opening 61, elastic support 62, cavity 63. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects 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 merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0025] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0027] like Figures 1 to 6 As shown, a dustproof sealing ring structure for an electric motor includes a motor body 1. An end cap 2 is provided on one side of the motor body 1, and a motor shaft hole 21 is formed on the end cap. A motor shaft 3 extends through the motor shaft hole and out of the end cap 2. A first sealing ring 4 and a second sealing ring 5 are fitted between the end cap 2 and the motor shaft 3, and the first sealing ring 4 and the second sealing ring 5 are respectively interference-fitted onto the motor shaft 3. The first sealing ring 4 is located on top of the second sealing ring 5. The arrangement of the first sealing ring 4 and the second sealing ring 5 provides a double sealing performance between the end cap 2 and the motor shaft 3, effectively improving the dustproof effect of the sealing ring.

[0028] Further, the bottom of the first sealing ring 4 is provided with an annular protrusion 44, and the second sealing ring 5 is provided with an annular groove 51 corresponding to the position of the annular protrusion 44, and the annular groove 51 is clamped with the annular protrusion 44. In addition, the cross section of the annular protrusion 44 and the annular groove 51 is arranged in a sharp angle, and the annular protrusion 44 and the annular groove 51 can be more closely fitted with the increase of pressure, so that the sealing effect is better.

[0029] Reference Figure 3 , Figure 4 , Figure 5 As shown in the drawings, the first sealing ring 4 is provided with a dust collecting groove 43, which can make the dust in the surrounding air during the operation of the motor fall into the groove, reduce the dust entering the dustproof lip, and avoid the dust entering the motor, thereby ensuring the normal use of the motor.

[0030] Further, the inner ring of the first sealing ring 4 is provided with a downward inclined dustproof lip one 41 and a dustproof lip two 42, one end of the dustproof lip one 41 abuts on the motor shaft, which can block the external dust and prevent the dust in the dust collecting groove 43 from entering the sealing environment at the upper end of the dustproof lip two 42, and the dustproof lip two 42 can further seal the motor end cover 2 to prevent the dust at the upper end of the dustproof lip two 42 from entering the motor, effectively improving the sealing between the inner side of the sealing ring and the motor shaft 3.

[0031] In addition, the contact surface between the first sealing ring 4, the second sealing ring 5 and the outer periphery of the motor shaft is arc-shaped, so as to reduce the friction resistance between the first sealing ring 4 and the second sealing ring 5, and increase the wear resistance of the sealing ring. The outer periphery of the first sealing ring 4 and the second sealing ring 5 abuts on the side wall of the motor shaft hole 21, so that the sealing ring and the end cover connection maintain the sealing effect, and the sealing between the end cover 2 and the outer periphery of the sealing ring is effectively improved.

[0032] Reference Figure 5 , Figure 6 As shown in the drawings, the inner periphery of the first sealing ring 4 is provided with a cavity 6, one side of the cavity 6 is provided with an opening 61, and the opening 61 side abuts on the side wall of the motor shaft 3. The opening 61 can assist the first sealing ring 4 to bear greater pressure and bending, reduce the extrusion force of the motor shaft 3 during operation, so that the first sealing ring 4 can better fit the motor shaft 3, thereby achieving better sealing effect and ensuring the service life of the motor; and the sealing ring can be more convenient and fast to assemble and disassemble, thereby reducing the operation difficulty and time cost.

[0033] Further, the inside of the cavity 6 is connected with an elastic support 62, which is connected with the dust collecting groove 43, and the elastic support 62 can enhance the supporting force of the first sealing ring 4, so that the first sealing ring 4 can bear higher pressure.

[0034] In addition, the inside of the first sealing ring 4 is provided with a cavity 63, which is filled with an expanding agent, and the main component of the expanding agent is calcium sulphoaluminate, and the expanding agent can make the first sealing ring expand and increase the volume when heated, so that the first sealing ring is tightly attached to the motor shaft 3, and the first sealing ring is not easy to fall off during the operation of the motor, and the sealing effect between the first sealing ring and the motor shaft is effectively improved.

[0035] When the sealing ring is used, the second sealing ring 5 and the first sealing ring 4 are sequentially sleeved on the connecting part of the end cover 2 and the motor shaft 3, and the first sealing ring 4 and the second sealing ring 5 are clamped with each other, and the dustproof lip one 41 and the dustproof lip two 42 are inclined downward and abut on the outer periphery of the motor shaft 3. When the first sealing ring 4 and the second sealing ring 5 are installed to the specified position, the dustproof lip one 41 and the dustproof lip two 42 are made of rubber material and tightly attached to the motor shaft. During the operation of the motor, heat is generated, the expanding agent in the cavity of the first sealing ring 4 is heated and expanded to increase the volume and expand the cavity 63, so that the first sealing ring is tightly attached to the motor shaft 3, and dust is prevented from entering the inside of the motor. In addition, grease is added in the sealing space between the first sealing ring 4, the second sealing ring 5 and the motor shaft 3, which can not only fill the gap and maintain the sealing between the first sealing ring and the motor shaft, but also can play a lubricating role to reduce the wear between the parts, thereby prolonging the service life of the motor.

[0036] The above only describes the preferred embodiments of the present application, and does not limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dust-proof seal ring structure for an electric machine, comprising an electric machine main body (1), characterized by: The motor body (1) is provided with an end cover (2) on one side, the end cover (2) is provided with a motor shaft hole (21), the motor shaft hole (21) is provided with a motor shaft (3) extending out of the end cover (2), the end cover (2) and the motor shaft (3) are provided with a first sealing ring (4), a second sealing ring (5), the first sealing ring (4) is clamped on the second sealing ring (5), the outer periphery of the first sealing ring (4) and the second sealing ring (5) abuts with the side wall of the motor shaft hole (21), the first sealing ring (4) is provided with a downward inclined dustproof lip one (41), a dustproof lip two (42), the dustproof lip one (41), the dustproof lip two (42) abut on the outer periphery of the motor shaft (3), the first sealing ring (4) is provided with a dust collection groove (43).

2. The dust-proof sealing ring structure for an electric machine according to claim 1, wherein: The bottom of the first sealing ring (4) is provided with an annular convex strip (44), the second sealing ring (5) is provided with an annular groove (51) corresponding to the position of the annular convex strip (44), the annular groove (51) is clamped with the annular convex strip (44).

3. The dust-proof sealing ring structure for an electric machine according to claim 1, wherein: The inner periphery of the first sealing ring (4) is provided with a cavity (6), one side of the cavity (6) is provided with an opening (61), the opening (61) side abuts on the motor shaft (3).

4. The dust-proof sealing ring structure for an electric machine according to claim 3, wherein: The inside of the cavity (6) is provided with an elastic support (62).

5. The dust-proof sealing ring structure for an electric machine according to claim 3, wherein: The inside of the first sealing ring (4) is provided with a cavity (63), the cavity (63) is filled with an expanding agent.

6. The dust-proof sealing ring structure for an electric machine according to claim 1, wherein: The first sealing ring (4), the second sealing ring (5) are interference fitted on the motor shaft (3).

7. The dust-proof sealing ring structure for an electric machine according to claim 1, wherein: The contact surface between the first sealing ring (4), the second sealing ring (5) and the outer periphery of the motor shaft (3) is arc-shaped.

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