A seal disc structure for an electric machine

Abstract

A kind of sealing disc structure for motor, including the disc body being connectable on the shell of motor, the disc body is distributed with the disc body through hole being able to be connected with the inner cavity of the fan cover of motor around the connection position of shell, disc body mounting groove is arranged in the middle of the disc body, the mounting groove through hole of the drive shaft of motor can be passed through in the middle of the disc body mounting groove, waterproof cover structure is embedded in the disc body mounting groove, cover body through hole is arranged in the middle of the waterproof cover structure and is communicated with mounting groove through hole and can pass through the drive shaft.The utility model has the advantages that the waterproof cover structure is clamped between the disc body and the end of shell, and is very convenient to disassemble and assemble, with high installation efficiency;The waterproof cover structure can improve the sealing performance of the end of shell, with good waterproof effect, prolonging the service life of motor.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing technology, and in particular to a sealing disc structure for motors. Background Technology

[0002] A Chinese utility model patent with application number CN201922262652.3, entitled "A Novel Waterproof Vibration Motor," discloses a novel waterproof vibration motor. The motor body has a mounting base fixed to its end face, and the motor body is fixedly mounted to the inner side of the end face of a waterproof shell via the mounting base. The waterproof shell is a hollow cylindrical structure, with a waterproof plate fixed to its end face. A water-proof structure, also a hollow cylindrical structure, is fixed to the center of the waterproof plate. Waterproof covers are fitted and fixed to the outer edges of both ends of the waterproof shell. The rotor shaft of the vibration motor body extends outwards from the mounting base, waterproof plate, water-proof structure, and waterproof covers. The rotor shaft is connected to the waterproof plate, water-proof structure, and waterproof covers via water-sealed rubber sleeves, maintaining relative rotation. The sidewalls of the waterproof covers are fixedly connected to the outer walls of the waterproof shell via bolts, and an annular sealing sleeve is nested at the contact point between the waterproof cover and the end face of the waterproof shell. This utility model has the beneficial effect of highly efficient waterproofing. However, the waterproof structure of this motor is bulky and inefficient during installation, leaving room for improvement. Therefore, the structure of this motor needs further improvement. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a sealing disc structure for motors that is easy to disassemble and assemble, has high installation efficiency, and has good waterproof effect, in light of the above-mentioned existing technology.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: This sealing disc structure for motors includes a disc body that can be connected to the housing of the motor, and through holes of the disc body that can communicate with the inner cavity of the motor's fan cover are distributed around the connection position with the housing. The characteristic is that: a disc body mounting groove is provided in the middle of the disc body, and a mounting groove through hole that can pass through the drive shaft of the motor is provided in the middle of the disc body mounting groove. A waterproof cover structure is fitted in the disc body mounting groove, and a cover through hole that communicates with the mounting groove through hole and can pass through the drive shaft is provided in the middle of the waterproof cover structure.

[0005] As an improvement, the waterproof cover structure preferably includes a cover body and a sealing ring. An annular oil injection chamber is provided in the cover body, and an annular fitting groove is provided on the inner wall of the cover body. An opening at the bottom of the fitting groove, connecting to the oil injection chamber, is provided on the bottom surface of the groove. The sealing ring is fitted into the fitting groove. The sealing ring itself can improve the sealing performance of the housing end face, and simultaneously guides oil to wet the gap between the drive shaft and the housing end face, increasing the wetting area and further improving the sealing performance.

[0006] Further improvements include the option of using a fully open, through-groove design for the fitting groove. This allows for better oil film formation, resulting in improved waterproofing and sealing.

[0007] Further improvement is made by preferably having the same inner diameter as the diameter of the through hole in the cover body, thereby further enhancing the sealing performance.

[0008] As a further improvement, it is preferable to provide upwardly protruding retaining rings on both the inner ring of the sealing ring and the inner edge of the through hole in the cover. This can block particulate matter from entering the housing, resulting in better performance.

[0009] As an improvement, the cover can preferably include an upper cylinder and a lower disc, the diameter of the disc being larger than the diameter of the cylinder. An annular sealing protrusion is preferably provided on the top surface of the disc, and this sealing protrusion contacts the bottom surface of the disc mounting groove. This further enhances the sealing performance.

[0010] A further improvement is made by preferably providing an annular protrusion on the top surface of the sealing protrusion. The sealing protrusion, the annular protrusion, and the cover are elastic structures made of rubber. When the sealing protrusion contacts the top of the disc mounting groove, the annular protrusion is compressed and deformed, pressing against the bottom surface of the disc mounting groove. This further enhances the sealing performance.

[0011] As an improvement, the outer wall of the disc body can preferably be provided with an annular disc body recess, and the fan cover is inserted into the disc body recess. The fan cover is more securely fixed.

[0012] As an improvement, the bottom surface of the disc can preferably have connecting protrusions that can be inserted into the recesses on the end face of the housing, and the connecting protrusions are provided with threaded through holes for inserting screws. The disc is easy to assemble and disassemble, and the connection stability is higher.

[0013] As an improvement, a recessed portion on the top surface of the disc body is preferably provided to accommodate the fan. This reduces the amount of particulate matter entering the housing cavity and extends the service life of the motor.

[0014] Compared with the prior art, the advantages of this utility model are as follows: a disk mounting groove is provided in the middle of the disk body, and a mounting groove through hole for the drive shaft of the motor is provided in the middle of the disk mounting groove. A waterproof cover structure is embedded in the disk mounting groove. This structure clamps the waterproof cover structure between the disk body and the end of the housing, which is very convenient to disassemble and assemble and has high installation efficiency. The waterproof cover structure can improve the sealing performance of the end of the housing, has a good waterproof effect, and extends the service life of the motor. Attached Figure Description

[0015] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0016] Figure 2 for Figure 1 Top view;

[0017] Figure 3 yes Figure 2 Cross-sectional view along line AA;

[0018] Figure 4 This is a perspective view of an embodiment of the present invention mounted on the housing;

[0019] Figure 5 yes Figure 4 Exploded structural diagram;

[0020] Figure 6 yes Figure 4 A structural decomposition diagram from another angle;

[0021] Figure 7 yes Figure 1 Exploded structural diagram;

[0022] Figure 8 yes Figure 1 A structural breakdown diagram from another perspective;

[0023] Figure 9 yes Figure 4 A schematic diagram of the structure after connecting the fan and the fan cover;

[0024] Figure 10 yes Figure 7 A sectional view of the waterproof cover structure after it has been cut along the plane containing the centerline;

[0025] Figure 11 yes Figure 7 Exploded view of the structure of the middle cover after being cut open along the plane containing the center line. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] like Figures 1 to 11 As shown, the sealing disc structure for a motor in this embodiment includes a disc body 3 that can be connected to the motor housing 1. The disc body 3 has through holes 32 distributed around its connection point with the housing 1, communicating with the inner cavity of the motor's fan shroud 4. A disc body mounting groove 31 is provided in the center of the disc body 3. A mounting groove through hole for the motor's drive shaft 61 is provided in the center of the disc body mounting groove 31. The motor's drive unit is located in the housing 1. The specific structure of the drive unit is known technology and will not be described in detail. The drive shaft 61 of the drive unit passes through the mounting groove through hole and connects to the motor's fan. A waterproof cover structure is fitted into the disc body mounting groove 31. A cover through hole communicating with the mounting groove through hole and allowing the drive shaft 61 to pass through is provided in the center of the waterproof cover structure.

[0028] The waterproof cap structure includes a cap body 2 and a sealing ring 20. An annular oil injection cavity 21 is provided in the cap body 2. An annular fitting groove 22 is provided on the inner wall of the cap body 2. An opening at the bottom of the fitting groove 22, connecting to the oil injection cavity 21, is provided on the bottom surface of the groove. The sealing ring 20 is fitted into the fitting groove 22. The fitting groove 22 is a fully open fitting through groove. The inner diameter of the sealing ring 20 is the same as the diameter of the through hole in the cap body. An upwardly protruding retaining ring 201 is provided on both the inner ring of the sealing ring 20 and the inner edge of the through hole in the cap body.

[0029] The cover 2 comprises an upper cylindrical body and a lower disc body, the diameter of which is larger than that of the cylinder. An annular sealing protrusion 23 is provided on the top surface of the disc body, and the sealing protrusion 23 contacts the bottom surface of the disc body mounting groove 31. An annular protrusion 231 is provided on the top surface of the sealing protrusion 23. The sealing protrusion 23, the annular protrusion 231, and the cover 2 are elastic structures made of rubber. When the sealing protrusion 23 contacts the disc body mounting groove 31, the annular protrusion 231 is deformed under pressure and contacts the bottom surface of the disc body mounting groove 31. An annular disc body recess 33 is provided on the outer wall of the disc body 3, and the fan cover 4 is inserted into the disc body recess 33.

[0030] The bottom surface of the disc body 3 has connecting protrusions 34 that can be inserted into the recesses 11 on the end face of the housing, and threaded through holes for inserting screws are provided on the connecting protrusions 34. The top surface of the disc body 3 has a disc top surface recess 35 that can accommodate a fan.

Claims

1. A sealing disc structure for an electric motor, comprising a disc body (3) that can be connected to a housing (1) of the electric motor, wherein through holes (32) are distributed on the disc body (3) around the connection position with the housing (1) and can communicate with the inner cavity of the fan cover (4) of the electric motor, characterized in that: A disk mounting groove (31) is provided in the middle of the disk body (3). A mounting groove through hole that can pass through the drive shaft (61) of the motor is provided in the middle of the disk mounting groove (31). A waterproof cover structure is fitted in the disk mounting groove (31). A cover through hole that communicates with the mounting groove through hole and can pass through the drive shaft (61) is provided in the middle of the waterproof cover structure.

2. The sealing disc structure according to claim 1, characterized in that: The waterproof cover structure includes a cover body (2) and a sealing ring (20). An annular oil injection cavity (21) is provided in the cover body (2). An annular fitting groove (22) is provided on the inner wall of the cover body (2). A groove bottom opening that can communicate with the oil injection cavity (21) is provided on the bottom surface of the fitting groove (22). The sealing ring (20) is fitted in the fitting groove (22).

3. The sealing disc structure according to claim 2, characterized in that: The fitting groove (22) is a fitting through groove with a completely open bottom surface.

4. The sealing disc structure according to claim 3, characterized in that: The inner diameter of the sealing ring (20) is the same as the diameter of the through hole in the cover.

5. The sealing disc structure according to claim 4, characterized in that: An upwardly protruding retaining ring (201) is provided on the inner ring of the sealing ring (20) and on the inner edge of the through hole of the cover.

6. The sealing disc structure according to any one of claims 2 to 5, characterized in that: The cover (2) includes an upper cylinder and a lower disc. The diameter of the disc is larger than the diameter of the cylinder. An annular sealing protrusion (23) is provided on the top surface of the disc. The sealing protrusion (23) is in contact with the bottom surface of the disc mounting groove (31).

7. The sealing disc structure according to claim 6, characterized in that: An annular protrusion (231) is provided on the top surface of the sealing protrusion (23). The sealing protrusion (23), the annular protrusion (231) and the cover (2) are elastic structures made of rubber. When the sealing protrusion (23) comes into contact with the disc mounting groove (31), the annular protrusion (231) is deformed by pressure and comes into contact with the bottom surface of the disc mounting groove (31).

8. The sealing disc structure according to any one of claims 1 to 5, characterized in that: The outer wall of the disc body (3) is provided with an annular disc body recess (33), and the wind cover (4) is inserted into the disc body recess (33).

9. The sealing disc structure according to any one of claims 1 to 5, characterized in that: On the bottom surface of the disc (3), there are connecting protrusions (34) that can be inserted into the recesses (11) on the end face of the housing, and threaded through holes for inserting screws are provided on the connecting protrusions (34).

10. The sealing disc structure according to any one of claims 1 to 5, characterized in that: A recessed portion (35) for accommodating a fan is provided on the top surface of the disc body (3).

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