Motor protection structure

Abstract

The invention relates to the technical field of motors, and the motor comprises a motor main body, a main shaft head, a grinding wheel seat and a connecting piece, the main shaft head is connected with the grinding wheel seat through the connecting piece, an outer side VA oil seal and a middle VA oil seal are arranged at the joint of the grinding wheel seat and the connecting piece, and a protection mechanism is arranged on the outer surface of the motor main body. The outer side VA oil seal and the middle VA oil seal are installed at the joint of the grinding wheel seat and the connecting piece, the lip face of the middle VA oil seal is attached to the surface of the grinding wheel seat, and the framework sealing ring is arranged between the connecting piece and the main shaft head, so that the sealing effect of the motor body can be improved, and normal use of the motor body is prevented from being affected; the sealing performance is further improved, glass powder and other powder are prevented from entering the motor body, and meanwhile the protective shell can be fixed to the outer surface of the motor body.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a motor protection structure. Background Art

[0002] Grinding head motors are mainly used in the material processing industry for grinding corners, etc. Due to the special operating conditions and performance requirements, dust may enter the motor and affect the service life of the grinding head motor. Summary of the invention

[0003] The purpose of the present invention is to provide a motor protection structure which can effectively ensure the service life of the grinding head motor.

[0004] The present invention adopts the following technical scheme: a motor protection structure, comprising a motor body, a spindle head, a grinding wheel seat and a connecting piece, wherein the spindle head and the grinding wheel seat are connected by a connecting piece, an outer VA oil seal and an intermediate VA oil seal are respectively arranged at the connection between the grinding wheel seat and the connecting piece, and a protection mechanism is arranged on the outer surface of the motor body;

[0005] The protective mechanism includes a protective shell sleeved on the surface of the motor body, a dustproof net is provided at one end of the protective shell, a short block is fixedly installed at the other end of the protective shell, a sliding rod is inserted into the interior of the short block, a tension spring is sleeved on the surface of the sliding rod, a pulling block is fixedly installed on the top end of the sliding rod, and a clamping block is fixedly installed on the bottom end of the sliding rod.

[0006] As a preferred motor protection structure of the present invention, a first annular groove with an opening facing backward is formed on the rear end surface of the grinding wheel seat, a first annular protrusion protruding forward is formed on the front end surface of the connecting piece, the first annular protrusion is inserted into the first annular groove, and a gap is formed between the bottom of the first annular groove and the top surface of the first annular protrusion;

[0007] A second annular protrusion protruding backwards is provided on the rear end surface of the grinding wheel seat, and a VA oil seal is provided between the second annular protrusion and the first annular protrusion, and the VA oil seal is used as an intermediate VA oil seal;

[0008] A second annular groove with an opening facing backward is formed on the rear end surface of the grinding wheel seat, and a VA oil seal is arranged in the second annular groove. The VA oil seal is used as an outer VA oil seal, and the outer VA oil seal is located on the outer side of the middle VA oil seal.

[0009] The connecting member is provided with a bolt hole, the central axis of the bolt hole is parallel to the central axis of the motor shaft, a countersunk bolt is provided in the bolt hole, and the connecting member is fixedly connected to the housing of the motor body through the countersunk bolt. The bolt hole is provided on the outside of the first VA oil seal. The maximum distance from the bolt hole to the central axis of the motor shaft is less than the maximum distance from the second VA oil seal to the central axis of the motor shaft, but greater than the minimum distance from the second VA oil seal to the central axis of the motor shaft.

[0010] As a preferred motor protection structure of the present invention, the lip surface of the middle VA oil seal is in contact with the surface of the grinding wheel seat, and the lip surface of the outer VA oil seal faces opposite to the lip surface of the middle VA oil seal. A skeleton sealing ring is arranged between the connector and the spindle head.

[0011] As a preferred motor protection structure of the present invention, the top surface and the bottom surface of the protection shell are both provided with through holes, and the through holes are evenly distributed on the top surface and the bottom surface of the protection shell.

[0012] As a preferred motor protection structure of the present invention, a limiting groove is provided at one end of the protection shell on which the short block is installed, and a limiting block is fixedly installed on the top surface of the clamping block.

[0013] As a preferred motor protection structure of the present invention, the limiting groove and the limiting block are matched in shape and size, and the limiting block is located inside the limiting groove and is slidably connected to the limiting groove.

[0014] As a preferred motor protection structure of the present invention, the block is in a U-shape, and the U-shaped opening faces downward.

[0015] As a preferred motor protection structure of the present invention, one end of the tension spring is fixedly connected to the bottom surface of the pull block, and the other end of the tension spring is fixedly connected to the top surface of the short block.

[0016] As a preferred motor protection structure of the present invention, grid frames are provided on both sides of the protection shell, and the grid frames are evenly distributed on both sides of the protection shell.

[0017] As a preferred motor protection structure of the present invention, anti-collision blocks are arranged inside the protective shell, and the anti-collision blocks are respectively distributed at the four corners inside the protective shell.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are:

[0019] 1. In the present invention, by installing the outer VA oil seal and the middle VA oil seal at the connection between the grinding wheel seat and the connecting piece, and making the lip surface of the middle VA oil seal fit the surface of the grinding wheel seat, and arranging a skeleton sealing ring between the connecting piece and the spindle head, the sealing effect of the motor body can be improved to avoid affecting the normal use of the motor body.

[0020] 2. In the present invention, a protective mechanism is provided, and the protective shell and the dustproof net can improve the protective effect of the motor body, further improve its sealing, and prevent glass powder and other powders from entering the interior of the motor body. At the same time, tension springs, sliding rods, pull blocks, card blocks, limit grooves and limit blocks are provided, and the protective shell can be fixed on the outer surface of the motor body. Through holes and grid frames are also provided on the surface of the protective shell, which can improve the heat dissipation effect of the protective shell, and anti-collision blocks are provided at the four corners of the inner wall of the protective shell, which can improve the service life of the motor body to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a motor protection structure is provided for the present invention;

[0022] Figure 2 A partial exploded diagram of a protection mechanism of a motor protection structure is proposed for the present invention;

[0023] Figure 3 The present invention proposes a motor protection structure Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 The present invention provides a partial schematic diagram of a protective structure of a motor protective structure.

[0025] Legend:

[0026] 1. Motor body; 2. Spindle head; 3. Grinding wheel seat; 4. Connecting parts; 5. Outer VA oil seal; 6. Middle VA oil seal;

[0027] 7. Protective mechanism; 701. Protective shell; 702. Dustproof net; 703. Short block; 704. Sliding rod; 705. Tension spring; 706. Pull block; 707. Card block; 708. Limiting groove; 709. Limiting block; 710. Through hole; 711. Grid frame; 712. Anti-collision block;

[0028] 8. Skeleton sealing ring. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0031] Example

[0032] See also Figure 1-4 The present invention provides a technical solution: a motor protection structure, comprising a motor body 1, a spindle head 2, a grinding wheel seat 3 and a connecting member 4, wherein the spindle head 2 and the grinding wheel seat 3 are connected by the connecting member 4, and an outer VA oil seal 5 and an intermediate VA oil seal 6 are respectively arranged at the connection between the grinding wheel seat 3 and the connecting member 4, and the lip surface of the intermediate VA oil seal 6 is in contact with the surface of the grinding wheel seat 3, and a skeleton sealing ring 8 is arranged between the connecting member 4 and the spindle head 2, which can improve the sealing effect, and a protection mechanism 7 is arranged on the outer surface of the motor body 1. A first annular groove with an opening facing backward is opened on the rear end surface of the grinding wheel seat, and a first annular protrusion protruding forward is arranged on the front end surface of the connecting member, and the first annular protrusion is inserted into the first annular groove, and a gap is arranged between the groove bottom of the first annular groove and the top surface of the first annular protrusion. A second annular protrusion protruding backward is arranged on the rear end surface of the grinding wheel seat, and a VA oil seal is arranged between the second annular protrusion and the first annular protrusion, and the VA oil seal is used as the intermediate VA oil seal. A second annular groove with an opening facing backward is formed on the rear end surface of the grinding wheel seat. A VA oil seal is arranged in the second annular groove. The VA oil seal is used as an outer VA oil seal, and the outer VA oil seal is located outside the middle VA oil seal.

[0033] A bolt hole is provided on the connecting piece, and the central axis of the bolt hole is parallel to the central axis of the motor shaft. A countersunk bolt is provided in the bolt hole, and the connecting piece is fixedly connected to the outer shell of the motor body by the countersunk bolt. The bolt hole is provided on the outside of the first VA oil seal. The maximum distance from the bolt hole to the central axis of the motor shaft is less than the maximum distance from the second VA oil seal to the central axis of the motor shaft, but greater than the minimum distance from the second VA oil seal to the central axis of the motor shaft. Preferably, the lip surface of the middle VA oil seal is in contact with the surface of the grinding wheel seat, and the lip surface of the outer VA oil seal faces opposite to the lip surface of the middle VA oil seal. A skeleton sealing ring is provided between the connecting piece and the spindle head.

[0034] The protection mechanism 7 includes a protection shell 701 sleeved on the surface of the motor body 1, and anti-collision blocks 712 are arranged inside the protection shell 701. The anti-collision blocks 712 are respectively distributed at the four corners inside the protection shell 701. The anti-collision blocks 712 can provide a protective effect on the surface of the motor body 1 when shaking occurs between the motor body 1 and the protection shell 701. Grid frames 711 are arranged on both sides of the protection shell 701. The grid frames 711 are evenly distributed on both sides of the protection shell 701. The grid frames 711 can further improve the heat dissipation effect of the protection shell 701. The protective shell 701 is provided with a limiting groove 708 at one end of the short block 703. The limiting groove 708 matches the limiting block 709 in shape and size. The limiting block 709 is located inside the limiting groove 708 and is slidably connected to the limiting groove 708. The limiting block 709 is fixedly installed on the top surface of the card block 707. The limiting block 709 and the limiting groove 708 can limit the movement trajectory of the card block 707 to prevent the tension spring 705 from excessive deformation. The top and bottom surfaces of the protective shell 701 are provided with through holes 710, and the through holes 710 are evenly spaced. The top and bottom surfaces of the protective shell 701 are arranged, and the through holes 710 can improve the heat dissipation effect of the protective shell 701 to prevent the motor body 1 from overheating during use and reducing its service life. A dust net 702 is arranged at one end of the protective shell 701, and the dust net 702 is fixedly connected to the protective shell 701 by bolts, which is convenient for disassembly and replacement of the dust net 702. A short block 703 is fixedly installed at the other end of the protective shell 701, and a sliding rod 704 is inserted into the interior of the short block 703. A tension spring 705 is sleeved on the surface of the sliding rod 704. One end is fixedly connected to the bottom surface of the pull block 706, and the other end of the tension spring 705 is fixedly connected to the top surface of the short block 703. When the tension spring 705 loses external force, the pull block 706 can be driven to move under the action of its own tension, so that the slide bar 704 is automatically reset. The top end of the slide bar 704 is fixedly installed with the pull block 706, and the bottom end of the slide bar 704 is fixedly installed with a clamping block 707. The shape of the clamping block 707 is U-shaped, and the U-shaped opening is downward, which can be clamped with one end of the motor body 1, so as to fix the protective shell 701 on the surface of the motor body 1.

[0035] Working principle: When in use, the outer VA oil seal 5 and the middle VA oil seal 6 can improve the sealing effect of the motor body 1 and prevent powders such as glass powder from entering the interior of the motor body 1. When it is necessary to further improve the protection effect, manually pull the pull block 706 to make the pull block 706 drive the slide bar 704 to move, and the slide bar 704 drives the clamping block 707 to move. At the same time, the clamping block 707 squeezes the tension spring 705. At this time, the protective shell 701 is inserted from the rear end of the motor body 1 until the clamping block 707 moves to the front end of the motor body 1. At this time, release the hand pulling the pull block 706, and the tension spring 705 loses the external force. Due to its own tension, it drives The pull block 706 moves downward, and at the same time, the pull block 706 drives the sliding rod 704 to move, and the sliding rod 704 drives the clamping block 707 to move until the clamping block 707 is clamped with the front end of the motor body 1. At this time, the protective shell 701 can be fixed on the surface of the motor body 1. When the motor body 1 is working, the through hole 710 and the grid frame 711 can improve the heat dissipation effect of the protective shell 701. At the same time, the dustproof net 702 can block the dust at the tail end of the motor body 1 to a certain extent to avoid affecting the service life of the motor body 1. At the same time, when the dustproof net 702 needs to be removed, it only needs to remove the bolts to replace the dustproof net 702.

[0036] A motor protection structure may also include a blower, which blows cold air into the space between the motor body and the protective shell. Thus, while the motor body is cooled by the cold air, the cold air is used to increase the difficulty of dust entering the protective shell, thereby increasing the difficulty of dust entering the motor body. Preferably, the top surface of the protective shell located at the top is an inclined surface, so that the caliber of the protective shell is smaller on the side closer to the grinding wheel seat, and the blower is located on the side away from the motor shaft, so that the cold air blows from the back of the motor to the head of the motor, and the wind force increases as the caliber decreases. Thus, the space between the grinding wheel seat and the connector can also be blown by the wind, thereby increasing the difficulty of dust entering between the grinding wheel seat and the connector. Under this structure, the dust cover 702 may not be provided, but the air outlet of the blower is connected to the dust cover.

[0037] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A motor protection structure, comprising a motor body (1), a spindle head (2), a grinding wheel seat (3) and a connecting piece (4), characterized in that: The spindle head (2) and the grinding wheel seat (3) are connected via a connecting piece (4); an outer VA oil seal (5) and an intermediate VA oil seal (6) are respectively provided at the connection between the grinding wheel seat (3) and the connecting piece (4); and a protective mechanism (7) is provided on the outer surface of the motor body (1); The protective mechanism (7) comprises a protective shell (701) sleeved on the surface of the motor body (1), one end of the protective shell (701) is provided with a dustproof net (702), the other end of the protective shell (701) is fixedly installed with a short block (703), a sliding rod (704) is inserted into the interior of the short block (703), a tension spring (705) is sleeved on the surface of the sliding rod (704), a pulling block (706) is fixedly installed at the top end of the sliding rod (704), and a clamping block (707) is fixedly installed at the bottom end of the sliding rod (704).

2. A motor protection structure according to claim 1, characterized in that: A first annular groove with an opening facing backward is formed on the rear end surface of the grinding wheel seat, and a first annular protrusion protruding forward is formed on the front end surface of the connecting piece. The first annular protrusion is inserted into the first annular groove, and a gap is formed between the bottom of the first annular groove and the top surface of the first annular protrusion. A second annular protrusion protruding backwards is provided on the rear end surface of the grinding wheel seat, and a VA oil seal is provided between the second annular protrusion and the first annular protrusion, and the VA oil seal is used as an intermediate VA oil seal; A second annular groove with an opening facing backward is formed on the rear end surface of the grinding wheel seat, and a VA oil seal is arranged in the second annular groove. The VA oil seal is used as an outer VA oil seal, and the outer VA oil seal is located on the outer side of the middle VA oil seal.

3. A motor protection structure according to claim 2, characterized in that: The lip surface of the middle VA oil seal is in contact with the surface of the grinding wheel seat, and the lip surface of the outer VA oil seal faces opposite to the lip surface of the middle VA oil seal.

4. A motor protection structure according to claim 3, characterized in that: The top surface and the bottom surface of the protective shell (701) are both provided with through holes (710), and the through holes (710) are evenly distributed on the top surface and the bottom surface of the protective shell (701).

5. A motor protection structure according to claim 4, characterized in that: A limiting groove (708) is provided at one end of the protective shell (701) on which the short block (703) is installed, and a limiting block (709) is fixedly installed on the top surface of the clamping block (707).

6. A motor protection structure according to claim 5, characterized in that: The shape and size of the limiting groove (708) and the limiting block (709) are matched, and the limiting block (709) is located inside the limiting groove (708) and is slidably connected to the limiting groove (708).

7. A motor protection structure according to claim 6, characterized in that: The block (707) is in a U-shape, with the U-shaped opening facing downward.

8. A motor protection structure according to claim 7, characterized in that: One end of the tension spring (705) is fixedly connected to the bottom surface of the pull block (706), and the other end of the tension spring (705) is fixedly connected to the top surface of the short block (703).

9. A motor protection structure according to claim 8, characterized in that: Grid frames (711) are provided on both sides of the protective shell (701), and the grid frames (711) are evenly distributed on both sides of the protective shell (701).

10. A motor protection structure according to claim 9, characterized in that: Anti-collision blocks (712) are arranged inside the protective shell (701), and the anti-collision blocks (712) are respectively distributed at the four corners inside the protective shell (701).

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