Grinding head protection structure

Abstract

The utility model relates to the field of motors. A grinding head protection structure comprises a grinding head motor, a grinding wheel base is arranged on a motor rotating shaft of the grinding head motor in a sleeved mode, a connecting piece is further arranged on the motor rotating shaft in a sleeved mode, and the connecting piece is clamped between the grinding wheel base and a motor shell of the grinding head motor. The connecting piece and the motor shell are fixedly connected, the connecting piece and the motor rotating shaft are rotationally connected and sealed through a framework sealing ring, and the connecting piece and the grinding wheel base are rotationally connected and sealed through a VA oil seal. According to the utility model, the head of the grinding head motor is sealed more tightly, and powder can be effectively prevented from entering the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a grinding head protection structure. Background Art

[0002] When the grinding head motor is grinding materials such as tiles, glass, stone, metal plates, etc., powder is likely to enter the motor and affect the sealing or operation of the motor. Utility Model Content

[0003] The purpose of this utility model is to solve the technical problems raised in the above background technology.

[0004] The utility model adopts the following technical solution: a grinding head protection structure, comprising a grinding head motor, wherein a grinding wheel seat is sleeved on the motor shaft of the grinding head motor, and wherein a connecting piece is sleeved on the motor shaft, and the connecting piece is clamped between the grinding wheel seat and the motor housing of the grinding head motor;

[0005] The connecting piece is fixedly connected to the motor housing, the connecting piece is rotationally connected to the motor shaft and is sealed by a skeleton sealing ring, and the connecting piece is rotationally connected to the grinding wheel seat and is sealed by a VA oil seal.

[0006] The utility model adds a connecting piece between the motor housing and the grinding wheel seat, and optimizes the connection method of the connecting piece. After the optimization, the head of the grinding head motor is sealed more tightly, which can effectively prevent powder from entering the motor.

[0007] Preferably, the connecting member has a bolt hole, the central axis of the bolt hole is parallel to the central axis of the motor shaft, a countersunk bolt is disposed in the bolt hole, and the connecting member is fixedly connected to the motor housing via the countersunk bolt. The present invention selects a fixing method for the connecting member, and the use of the countersunk bolt can effectively reduce the difficulty of installation.

[0008] Preferably, 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 with an annular shape and protruding forward is provided on the front end surface of the connecting piece, 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;

[0009] A second annular protrusion protruding backward 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 serves as the first VA oil seal.

[0010] The utility model optimizes the structure of the grinding wheel seat and the connecting piece, thereby forming a labyrinth groove structure at the connection between the two, which can improve the sealing effect while ensuring effective rotation.

[0011] Preferably, a second annular groove with a rearwardly facing opening is formed on the rear end surface of the grinding wheel seat. A VA oil seal is disposed within the second annular groove, serving as a second VA oil seal. The second VA oil seal is located outward of the first VA oil seal. The dual VA oil seals provided in this utility model effectively enhance the sealing effect and further reduce the probability of dust entering the motor.

[0012] Preferably, the lip surfaces of the first VA oil seal and the second VA oil seal face opposite directions to further improve the sealing effect.

[0013] Preferably, the bolt hole is opened on the outside of the first VA oil seal.

[0014] Preferably, the maximum distance between the bolt hole and the central axis of the motor shaft is less than the maximum distance between the second VA oil seal and the central axis of the motor shaft, but greater than the minimum distance between the second VA oil seal and the central axis of the motor shaft. This allows the bolt hole to be both oil-sealed and lubricated simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a cross-sectional view of the grinding head motor head. DETAILED DESCRIPTION

[0016] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0017] Reference Figure 1 A grinding head protection structure includes a grinding head motor, a grinding wheel seat 3 is sleeved on the motor shaft 2 of the grinding head motor, and a connecting member 4 is also sleeved on the motor shaft 2. The connecting member 4 is clamped between the grinding wheel seat 3 and the motor housing 1 of the grinding head motor. The connecting member 4 is fixedly connected to the motor housing 1, the connecting member 4 is rotationally connected to the motor shaft 2 and is sealed by a skeleton sealing ring 7, and the connecting member 4 is rotationally connected to the grinding wheel seat 3 and is sealed by a VA oil seal. The utility model adds a connecting member 4 between the motor housing 1 and the grinding wheel seat 3, and optimizes the connection method of the connecting member 4. After optimization, the seal at the head of the grinding head motor is tighter, which can effectively prevent powder from entering the motor.

[0018] Connector 4 has bolt holes, the central axes of which are parallel to the central axis of the motor shaft 2. Countersunk bolts are installed in the bolt holes, and connector 4 is fixed to motor housing 1 via these countersunk bolts. The present invention selects a fixing method for connector 4, effectively reducing installation difficulty by using countersunk bolts. Preferably, there are four bolt holes, evenly spaced and arranged in a ring around the central axis of the motor shaft.

[0019] A first annular groove with an opening facing backward is formed on the rear end face of the grinding wheel seat 3, and a first annular protrusion with an annular shape and protruding forward is provided on the front end face of the connecting member 4. 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 an annular shape and protruding backward is provided on the rear end face of the grinding wheel seat 3, and a VA oil seal is provided between the second annular protrusion and the first annular protrusion, with the VA oil seal serving as the first VA oil seal 6. The present invention optimizes the structure of the grinding wheel seat 3 and the connecting member 4, thereby forming a labyrinth groove structure at the connection between the two, which can improve the sealing effect while ensuring effective rotation. The spacing between the groove walls of the first annular groove is preferably equal.

[0020] A second annular groove with an opening facing backward is provided on the rear end face of the grinding wheel seat 3. A VA oil seal is provided in the second annular groove, and the VA oil seal serves as the second VA oil seal 5. The second VA oil seal 5 is located on the outside of the first VA oil seal 6. The utility model is provided with two VA oil seals, which can effectively improve the sealing effect and further reduce the probability of dust entering the motor. The spacing between the groove walls of the second annular groove preferably remains unchanged from the bottom of the groove to the groove mouth and then gradually increases. The cross-section of the groove wall of the second annular groove on the inner side is preferably parallel to the central axis of the motor shaft, and the cross-section of the groove wall of the second annular groove on the outer side is preferably an inclined surface, such as Figure 1 shown.

[0021] Preferably, the lip surfaces of the first VA oil seal 6 and the second VA oil seal 5 face opposite directions to further improve sealing. Preferably, the bolt holes are located outside the first VA oil seal 6. Furthermore, preferably, the maximum distance between the bolt holes and the central axis of the motor shaft 2 is less than the maximum distance between the second VA oil seal 5 and the central axis of the motor shaft 2, but greater than the minimum distance between the second VA oil seal 5 and the central axis of the motor shaft 2. This allows the bolt holes to be both oil-sealed and lubricated simultaneously.

[0022] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. 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 for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A grinding head protection structure, comprising a grinding head motor, wherein a grinding wheel seat is sleeved on the motor shaft of the grinding head motor, characterized in that: The motor shaft is also provided with a connecting piece, which is clamped between the grinding wheel seat and the motor housing of the grinding head motor; The connecting piece is fixedly connected to the motor housing, the connecting piece is rotationally connected to the motor shaft and is sealed by a skeleton sealing ring, and the connecting piece is rotationally connected to the grinding wheel seat and is sealed by a VA oil seal.

2. The grinding head protection structure according to claim 1, characterized in that: A bolt hole is formed on the connecting member, 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 motor housing via the countersunk bolt.

3. The grinding head protection structure according to claim 2, 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 with an annular shape and protruding forward is provided on the front end surface of the connecting piece. 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 protruding backward 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 serves as the first VA oil seal.

4. The grinding head protection structure according to claim 3, characterized in that: 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 provided in the second annular groove. The VA oil seal serves as a second VA oil seal and is located outside the first VA oil seal.

5. The grinding head protection structure according to claim 4, characterized in that: The lip surfaces of the first VA oil seal and the second VA oil seal face opposite directions.

6. The grinding head protection structure according to claim 4, characterized in that: The bolt hole is opened on the outer side of the first VA oil seal.

7. The grinding head protection structure according to claim 6, characterized in that: The maximum distance from the bolt hole to the central axis of the motor shaft is smaller than the maximum distance from the second VA oil seal to the central axis of the motor shaft, but larger than the minimum distance from the second VA oil seal to the central axis of the motor shaft.

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