Motor protection structure

Abstract

The present invention relates to the technical field of motors. Provided is a motor protection structure, comprising a motor body (1), a spindle head (2), a grinding wheel seat (3) and a connecting member (4). The spindle head (2) is connected to the grinding wheel seat (3) by means of the connecting member (4); an outer VA oil seal (5) and a middle VA oil seal (6) are separately provided at the joint between the grinding wheel seat (3) and the connecting member (4); and a protection mechanism (7) is provided on the outer surface of the motor body (1). The outer VA oil seal (5) and the middle VA oil seal (6) are mounted at the joint between the grinding wheel seat (3) and the connecting member (4), the lip surface of the middle VA oil seal (6) fits against the surface of the grinding wheel seat (3), and a skeleton sealing ring (8) is provided between the connecting member (4) and the spindle head (2), such that the sealing effect of the motor body (1) can be improved, thereby preventing disruption to the normal use of the motor body (1). The protection mechanism (7) is provided, further improving sealing performance, and preventing powder such as glass powder from entering the interior of the motor body (1). Additionally, a protection housing (701) can also be fixed on the outer surface of the motor body (1).

Description

A motor protection structure Technical Field

[0001] This invention relates to the field of motor technology, and more particularly to motor protection structures. Background Technology

[0002] Grinding head motors are mainly used in the materials processing industry for grinding edges and corners. Due to the special operating conditions and performance requirements, dust may enter the motor, affecting its service life. Summary of the Invention

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

[0004] The present invention adopts the following technical solution: a motor protection structure, including 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 the connecting piece, and an outer VA oil seal and a middle VA oil seal are respectively provided at the connection between the grinding wheel seat and the connecting piece, and a protective mechanism is provided on the outer surface of the motor body;

[0005] The protective mechanism includes a protective shell fitted onto the surface of the motor body. One end of the protective shell is provided with a dustproof net, and a short block is fixedly installed at the other end of the protective shell. A sliding rod is inserted inside the short block, and a tension spring is fitted onto the surface of the sliding rod. A pull block is fixedly installed at the top of the sliding rod, and a locking block is fixedly installed at the bottom of the sliding rod.

[0006] As a preferred embodiment of the motor protection structure of the present invention, the rear end face of the grinding wheel seat has a rearward-facing annular first annular groove, and the front end face of the connector has a forward-protruding annular first annular protrusion. The first annular protrusion is inserted into the first annular groove, and a gap is provided between the bottom of the first annular groove and the top surface of the first annular protrusion.

[0007] The rear end face of the grinding wheel seat is provided with a rearwardly protruding annular second annular protrusion, and a VA oil seal is provided between the second annular protrusion and the first annular protrusion, with the VA oil seal serving as an intermediate VA oil seal;

[0008] The rear end face of the grinding wheel seat has a rearward-facing, annular second groove. A VA oil seal is provided in the second annular groove, which serves as the outer VA oil seal. The outer VA oil seal is located outside the middle VA oil seal.

[0009] The connector has bolt holes, the central axis of which is parallel to the central axis of the motor shaft. Countersunk bolts are installed in the bolt holes, and the connector is fixedly connected to the outer casing of the motor body via these countersunk bolts. The bolt holes are located on the outside of the first VA oil seal. The maximum distance from the bolt holes 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] In a preferred embodiment of the motor protection structure of the present invention, the lip of the intermediate VA oil seal is in contact with the surface of the grinding wheel seat, and the lip of the outer VA oil seal faces opposite directions to the lip of the intermediate VA oil seal. A skeleton sealing ring is provided between the connector and the spindle head.

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

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

[0013] As a preferred embodiment of the motor protection structure of the present invention, the shape and size of the limiting groove and the limiting block are matched, the limiting block is located inside the limiting groove, and there is a sliding connection between the limiting groove and the limiting groove.

[0014] As a preferred embodiment of the motor protection structure of the present invention, the locking block is U-shaped with the U-shaped opening facing downwards.

[0015] As a preferred embodiment of the 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 embodiment of the motor protection structure of the present invention, the protective shell is provided with grid frames on both sides, and the grid frames are evenly distributed on both sides of the protective shell.

[0017] As a preferred embodiment of the motor protection structure of the present invention, the protective shell is provided with anti-collision blocks inside, 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 as follows:

[0019] 1. In this 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 of the middle VA oil seal fit against the surface of the grinding wheel seat, and by setting a skeleton sealing ring between the connecting piece and the spindle head, the sealing effect of the motor body can be improved, thus avoiding affecting the normal use of the motor body.

[0020] 2. In this invention, a protective mechanism is provided. The protective shell and dustproof net can improve the protection effect of the motor body and further improve its sealing performance, preventing powders such as glass powder from entering the motor body. At the same time, tension springs, sliding rods, pull blocks, locking blocks, limiting grooves and limiting blocks are also provided to fix the protective shell to the outer surface of the motor body. Through holes and grid frames are also provided on the surface of the protective shell to improve the heat dissipation effect of the protective shell. Furthermore, 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. Attached Figure Description

[0021] Figure 1 is a schematic diagram of a motor protection structure proposed in this invention;

[0022] Figure 2 is a partial exploded view of the protective mechanism of the motor protection structure proposed in this invention;

[0023] Figure 3 is an enlarged view of point A in Figure 2 of the motor protection structure proposed in this invention;

[0024] Figure 4 is a partial schematic diagram of the protective structure of the motor protection structure proposed in this invention.

[0025] Legend: 1. Motor body; 2. Spindle head; 3. Grinding wheel seat; 4. Connecting parts; 5. Outer VA oil seal; 6. Middle VA oil seal; 7. Protective mechanism; 701. Protective shell; 702. Dustproof net; 703. Short block; 704. Slide rod; 705. Tension spring; 706. Pull block; 707. Locking block; 708. Limiting groove; 709. Limiting block; 710. Through hole; 711. Grille frame; 712. Anti-collision block; 8. Skeleton sealing ring. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0028] Example

[0029] Please refer to Figures 1-4. This invention provides a technical solution: a motor protection structure, including a motor body 1, a spindle head 2, a grinding wheel seat 3, and a connecting member 4. The spindle head 2 and the grinding wheel seat 3 are connected by the connecting member 4. An outer VA oil seal 5 and a middle VA oil seal 6 are respectively provided at the connection between the grinding wheel seat 3 and the connecting member 4. The lip of the middle VA oil seal 6 is in contact with the surface of the grinding wheel seat 3. A skeleton sealing ring 8 is provided between the connecting member 4 and the spindle head 2 to improve the sealing effect. A protective mechanism 7 is provided on the outer surface of the motor body 1. A first annular groove with a rearward opening is provided on the rear end face of the grinding wheel seat. A first annular protrusion with a forward protrusion is provided on the front end face of the connecting member. The first annular protrusion is inserted into the first annular groove, and a gap is provided between the bottom of the first annular groove and the top surface of the first annular protrusion. A second annular protrusion with a rearward protrusion is provided on the rear end face of the grinding wheel seat. A VA oil seal is provided between the second annular protrusion and the first annular protrusion, serving as the middle VA oil seal. The rear end face of the grinding wheel seat has a second annular groove with the opening facing backward. A VA oil seal is provided in the second annular groove. This VA oil seal is used as the outer VA oil seal, which is located outside the middle VA oil seal.

[0030] The connector has bolt holes with their central axes parallel to the central axis of the motor shaft. Countersunk bolts are installed in these bolt holes, and the connector is fixed to the motor housing using these countersunk bolts. The bolt holes are located on the outer side of the first VA oil seal. The maximum distance from the bolt holes 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. Preferably, the lip of the intermediate VA oil seal is in contact with the surface of the grinding wheel seat, and the lip of the outer VA oil seal faces the opposite direction to that of the intermediate VA oil seal. A skeleton sealing ring is provided between the connector and the spindle head.

[0031] The protective mechanism 7 includes a protective shell 701 fitted onto the surface of the motor body 1. Anti-collision blocks 712 are disposed inside the protective shell 701, distributed at the four corners of the shell. The anti-collision blocks 712 provide protection to the surface of the motor body 1 when there is shaking between the motor body 1 and the protective shell 701. Grille frames 711 are evenly distributed on both sides of the protective shell 701, further improving the heat dissipation effect of the protective shell 701. The protective shell 701 has a limiting groove 708 at one end where the short block 703 is installed. The limiting groove 708 and the limiting block 709 are matched 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 locking block 707. The limiting block 709 and the limiting groove 708 can limit the movement trajectory of the locking block 707 to prevent excessive deformation of the tension spring 705. The top and bottom surfaces of the protective shell 701 are both provided with through holes 710, which are evenly distributed. The through holes 710, located on the top and bottom surfaces of the protective housing 701, improve heat dissipation, preventing overheating of the motor body 1 during use and reducing its service life. A dustproof mesh 702 is installed at one end of the protective housing 701, and is bolted to the housing for easy removal and replacement. A short block 703 is fixedly installed at the other end of the protective housing 701. A sliding rod 704 is inserted inside the short block 703, and a tension spring 705 is fitted onto the surface of the sliding rod 704. One end of the spring 705 is fixedly connected to the bottom surface of the pull block 706, and the other end of the spring 705 is fixedly connected to the top surface of the short block 703. When the spring 705 loses its external force, it can drive the pull block 706 to move under its own tension, thereby causing the slide bar 704 to 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 the locking block 707. The locking block 707 is U-shaped with the U-shaped opening facing downwards, and can lock with one end of the motor body 1, thereby fixing the protective shell 701 to the surface of the motor body 1.

[0032] Working principle: During use, the outer VA oil seal 5 and the middle VA oil seal 6 can improve the sealing effect of the motor body 1, preventing glass powder and other powders from entering the interior of the motor body 1. When further protection is needed, manually pull the pull block 706, causing the pull block 706 to drive the slide rod 704 to move. The slide rod 704 drives the locking block 707 to move, and at the same time, the locking block 707 compresses the tension spring 705. At this time, the protective shell 701 is inserted from the tail end of the motor body 1 until the locking block 707 moves to the front end of the motor body 1. At this time, release the hand that pulled the pull block 706. The tension spring 705 loses the external force and, due to its own tension, drives the motor body 1 to move. Pull block 706 moves downwards, simultaneously driving slide bar 704 to move. Slide bar 704 drives locking block 707 to move until locking block 707 engages with the front end of motor body 1. At this point, protective shell 701 can be fixed to the surface of motor body 1. When motor body 1 is working, through hole 710 and grille frame 711 can improve the heat dissipation effect of protective shell 701. At the same time, dustproof net 702 can block dust at the tail end of motor body 1 to a certain extent, avoiding affecting the service life of motor body 1. When it is necessary to remove dustproof net 702, simply remove the bolts to replace dustproof net 702.

[0033] A motor protection structure may further include a blower that blows cold air between the motor body and the protective shell. This cools the motor body while simultaneously increasing the difficulty for dust to enter the protective shell, thus making it more difficult for dust to enter the motor body. Preferably, the top surface of the protective shell is inclined, causing the diameter of the protective shell to decrease as it approaches the grinding wheel holder. The blower is located away from the motor shaft, so that cold air blows from the rear of the motor towards the motor head, with the airflow increasing as the diameter decreases. This ensures that the area between the grinding wheel holder and the connecting parts is also exposed to the airflow, further increasing the difficulty for dust to enter this area. With this structure, the dust cover 702 can be omitted; instead, the blower's outlet can be connected to the dust cover.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope 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 member (4), characterized in that: The spindle head (2) and the grinding wheel seat (3) are connected by a connector (4). The connection between the grinding wheel seat (3) and the connector (4) is provided with an outer VA oil seal (5) and an intermediate VA oil seal (6). The outer surface of the motor body (1) is provided with a protective mechanism (7). The protective mechanism (7) includes a protective shell (701) fitted onto the surface of the motor body (1). One end of the protective shell (701) is provided with a dustproof net (702), and the other end of the protective shell (701) is fixedly installed with a short block (703). A slide rod (704) is inserted inside the short block (703). A tension spring (705) is fitted onto the surface of the slide rod (704). A pull block (706) is fixedly installed at the top of the slide rod (704), and a locking block (707) is fixedly installed at the bottom of the slide rod (704).

2. The motor protection structure according to claim 1, characterized in that: The rear end face of the grinding wheel holder has a rearward-facing annular first annular groove, and the front end face of the connector has a forward-protruding annular first annular protrusion. The first annular protrusion is inserted into the first annular groove, and there is a gap between the bottom of the first annular groove and the top surface of the first annular protrusion. The rear end face of the grinding wheel seat is provided with a rearwardly protruding annular second annular protrusion, and a VA oil seal is provided between the second annular protrusion and the first annular protrusion, with the VA oil seal serving as an intermediate VA oil seal; The rear end face of the grinding wheel seat has a rearward-facing, annular second groove. A VA oil seal is provided in the second annular groove, which serves as the outer VA oil seal. The outer VA oil seal is located outside the middle VA oil seal.

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

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

5. The motor protection structure according to claim 4, characterized in that: The protective shell (701) has a limiting groove (708) at one end where the short block (703) is installed, and the top surface of the locking block (707) is fixedly installed with a limiting block (709).

6. The 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. The limiting block (709) is located inside the limiting groove (708) and is slidably connected to the limiting groove (708).

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

8. The 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. The motor protection structure according to claim 8, characterized in that: The protective shell (701) is provided with grid frames (711) on both sides, 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: The protective shell (701) is provided with anti-collision blocks (712) inside, and the anti-collision blocks (712) are respectively distributed at the four corners inside the protective shell (701).

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