Polishing tool power output protection mechanism

Abstract

The utility model relates to the technical field of polishing tools, in particular to a power output protection mechanism of a polishing tool, a power output part is embedded into an assembly cavity formed in a machine body, a protection cover is arranged on the lower portion of the power output part, a spring is arranged between the power output part and the protection cover, and the power output part is connected with the power output part. Limiting buckles connected to the power output part are clamped through buckle stretching-out holes correspondingly formed in the protective cover, so that the protective cover is arranged to move in the axial direction along the limiting buckles. The limiting buckle is inserted into a stepped hole formed in the grinding accessory to be clamped so that the grinding accessory can be connected with the power output part. The power output part is of a fixed structure so that the limiting buckle can be connected with the polishing accessory in a clamped mode, the protective cover can cover the motor shaft to avoid potential safety hazards caused by mistaken starting, the protective cover is matched with the limiting buckle under the action of the spring, and accidental injury of the limiting buckle to operators is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding tools, in particular to a power output protection mechanism for grinding tools. Background Art

[0002] When grinding or polishing a workpiece, sanding machines and other grinding tools are often used. They are popular among users because of their convenience and flexibility. A driving device is provided in the housing of the sanding machine. The driving device is connected to the working base plate through a transmission device, and abrasive materials such as sandpaper are attached to the bottom surface of the base plate. When working, the driving device drives the base plate assembly to move eccentrically or rotationally, and the base plate accessories attached to the base plate assembly will move accordingly to grind the working surface, making it smooth and flat.

[0003] After the sanding work head is removed, most sanding machines have exposed power output components. If the sanding machine body is started by mistake when the base plate is not installed, it is easy to cause safety risks due to the accidental rotation of the exposed hook, and the exposed hook may also cause accidental injury; the power output end of the existing body is connected to the drive device for rotation, and has a hook. In response to different grinding operation environments, base plates of different shapes are usually selected on the sanding machine, such as rectangular, circular, triangular, etc. During assembly, the power output end of the body will rotate, resulting in the hook being difficult to quickly assemble with the base plate assembly. Utility Model Content

[0004] The utility model aims to solve the above defects and provides a grinding tool power output protection mechanism.

[0005] In order to overcome the defects existing in the background technology, the technical solution adopted by the utility model to solve its technical problems is: a power output protection mechanism for a grinding tool, comprising a power output part installed on a machine body for detachably connecting with a grinding accessory, the power output part is embedded in an assembly cavity opened in the machine body, a protective cover is arranged at the lower part of the power output part, a spring is arranged between the power output part and the protective cover, the limit buckle connected to the power output part is clamped through the corresponding buckle extension hole opened on the protective cover, so that the protective cover can be axially moved along the limit buckle, and the limit buckle is inserted into the step hole opened on the grinding accessory for clamping so that the grinding accessory is connected to the power output part.

[0006] Further improvements include that the power output part includes an extension part and a circular ring plate embedded in the assembly cavity, one side of the circular ring plate is connected to the extension part and the other side is connected to the limit buckle, a bearing is embedded in the extension part, and an eccentric shaft embedded in the bearing is sleeved on the motor shaft in the machine body.

[0007] A further improvement includes an interference fit between the extension portion and the assembly cavity.

[0008] A further improvement includes a locking bolt that is threadedly connected to the end of the motor shaft to tighten the eccentric shaft.

[0009] A further improvement includes the annular plate being connected to the machine body via fixing bolts.

[0010] A further improvement includes that the protective cover comprises a cover body and a locking buckle connected to the cover body, the locking buckle passes through a locking opening opened on the circular ring plate to enable the protective cover to move axially relative to the circular ring plate, the locking opening is arranged corresponding to the embedded groove axially opened on the extension part so that the locking buckle is hidden in the embedded groove, and the buckle extension hole is located on the cover body.

[0011] A further improvement includes that the spring is sleeved on the locking buckle.

[0012] A further improvement includes providing a guide groove coaxially arranged with the locking buckle on the protective cover, and one end of the spring is inserted into the guide groove.

[0013] A further improvement includes providing a through hole on the protective cover facing the locking bolt.

[0014] The beneficial effects of the utility model are as follows: the design sets a power output part with a fixed structure to facilitate the connection between the limit buckle and the grinding accessory, and the protective cover can cover the motor shaft to avoid safety hazards caused by accidental startup, and the protective cover cooperates with the limit buckle under the action of the spring to avoid accidental injury to the operator by the limit buckle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is the front view of the utility model;

[0017] Figure 2 It is a top view of the power output part of the utility model;

[0018] Figure 3 It is a front view of the power output part of the utility model;

[0019] Figure 4 It is a front view of the protective cover in the utility model;

[0020] Figure 5 It is a top view of the protective cover in the utility model;

[0021] In the figure, 1-machine body, 2-power output part, 3-protective cover, 4-spring, 5-motor shaft, 6-eccentric shaft, 7-assembly cavity, 8-bearing, 9-fixing bolt, 10-step hole, 11-locking bolt, 12-grinding accessory, 201-circular ring plate, 202-locking opening, 203-embedded groove, 204-extension part, 205-limiting buckle, 301-locking buckle, 302-cover body, 303-guide groove, 304-through hole, 305-buckle extension hole. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The embodiments in the basic utility model and all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] according to Figure 1 , Figure 3 and Figure 5 As shown, a power output protection mechanism for a grinding tool comprises a power output part 2 mounted on a machine body 1 for detachably connecting with a grinding attachment 12, wherein the power output part 2 is embedded in an assembly cavity 7 provided in the machine body 1, a protective cover 3 is provided at the lower part of the power output part 2, a spring 4 is provided between the power output part 2 and the protective cover 3, a limiting buckle 205 connected to the power output part 2 is clamped through a corresponding buckle extension hole 305 provided on the protective cover 3, so that the protective cover 3 is axially moved along the limiting buckle 205, and the limiting buckle 205 has the function of limiting the protective cover 3, and the limiting buckle 205 is inserted into the step hole 10 provided on the grinding attachment 12 The grinding accessory 12 is connected to the power output part 2 by snapping, and the limit buckle 205 has the function of connecting the grinding accessory 12 and limiting the protective cover 3. With the above-mentioned embodiment, the power output part 2 is a fixed structure, which is convenient for the limit buckle 205 to be snapped into alignment with the step hole 10. At the same time, the protective cover 3 can cover the motor shaft 5 to avoid safety hazards caused by accidental start-up, and the protective cover 3 cooperates with the limit buckle 205 under the action of the spring 4 to avoid accidental injury to the operator by the limit buckle 205. At the same time, it protects the limit buckle 205 from accidental contact and breakage. The design drives the overall high-frequency radial movement of the body 1 through the high-frequency rotation of the eccentric shaft, so that the sandpaper fixed on the grinding accessory 12 can be ground.

[0024] according to Figure 2 and Figure 3As shown, the power output part 2 includes an extension part 204 and a circular ring plate 201 embedded in the assembly cavity 7, one side of the circular ring plate 201 is connected to the extension part 204, and the other side is connected to the limit buckle 205, the extension part 204 is embedded with a bearing 8, the eccentric shaft 6 embedded in the bearing 8 is sleeved on the motor shaft 5 in the body 1, so that the motor shaft 5 and the eccentric shaft 6 rotate synchronously, the extension part 204 and the assembly cavity 7 are interference fit, and the provision of the extension part 204 is beneficial to improving the stability of the motor shaft 5 during output, wherein the bearing 8 is preferably a needle bearing, a ball bearing or a sliding bearing.

[0025] according to Figure 1 As shown, the end of the motor shaft 5 is threadedly connected to a locking bolt 11 for tightening the eccentric shaft 6. The provision of the locking bolt 11 is beneficial to limiting the eccentric shaft 6 from coming off the motor shaft 5 during rotation, thereby ensuring stability and safety during grinding work.

[0026] The annular plate 201 is connected to the machine body 1 via fixing bolts 9 . This embodiment ensures the stability of the installation of the power output unit 2 .

[0027] according to Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the protective cover 3 includes a cover body 302 and a locking buckle 301 connected to the cover body 302, and at least three locking buckles 301 are provided. The locking buckles 301 pass through the locking opening 202 opened on the annular plate 201 to enable the protective cover 3 to move axially relative to the annular plate 201, and the locking opening 202 is corresponding to the embedded groove 203 axially opened on the extension part 204 so that the locking buckle 301 is hidden in the embedded groove 203, and the buckle extension hole 305 is located on the cover body 302. The above embodiment is adopted, which is conducive to achieving double limiting of the protective cover 3 and the power output part 2, and has a protective effect on the limiting buckle.

[0028] according to Figure 4 As shown, the spring 4 is sleeved on the locking buckle 301, and the locking buckle 301 has a guiding effect on the spring 4 to prevent the spring 4 from deforming left and right when compressed. The spring 4 is preferably a pagoda spring.

[0029] according to Figure 5 As shown, the protective cover 3 is provided with a guide groove 303 coaxially arranged with the locking buckle 301 , and one end of the spring 4 is inserted into the guide groove 303 . The provision of the guide groove 303 is helpful to prevent the spring 4 from radially moving.

[0030] The protective cover 3 is provided with a through hole 304 facing the locking bolt 11 . The through hole 304 is used for passing the locking bolt 11 , and the internal situation can be observed through the through hole 304 .

[0031] Working principle: the eccentric shaft 6 is sleeved on the motor shaft 5, and then the bearing 8 is sleeved on the eccentric shaft 6, and then the extension part 204 of the power output part 2 is sleeved on the bearing 8, and the extension part 204 is installed into the assembly cavity 7, the limit buckle 205 of the power output part 2 is inserted into the buckle extension hole 305 for clamping, and the locking buckle 301 of the protective cover 3 is inserted into the locking opening 202 for clamping;

[0032] Assembly state: the limit buckle 205 of the power output part 2 is inserted into the step hole 10 of the grinding attachment 12, and the hook at the end of the limit buckle 205 is hooked into the step hole 10;

[0033] Non-assembly state: the protective cover 3 is pushed away from the power output part 2 by the elastic force of the spring 4 , and the hook at the end of the limiting buckle 205 hooks and limits the cover body 302 .

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A power output protection mechanism for a grinding tool, comprising a power output portion (2) mounted on a body (1) for detachably connecting to a grinding attachment (12), wherein: The power output part (2) is embedded in an assembly cavity (7) provided in the body (1); a protective cover (3) is provided at the lower part of the power output part (2); a spring (4) is provided between the power output part (2) and the protective cover (3); a limit buckle (205) connected to the power output part (2) is engaged through a corresponding buckle extension hole (305) provided on the protective cover (3) so that the protective cover (3) is axially movable along the limit buckle (205); and the limit buckle (205) is inserted into a step hole (10) provided on the grinding attachment (12) for engagement so that the grinding attachment (12) is connected to the power output part (2).

2. A grinding tool power output protection mechanism as claimed in claim 1, characterized in that: The power output part (2) comprises an extension part (204) embedded in the assembly cavity (7) and a circular ring plate (201); one side of the circular ring plate (201) is connected to the extension part (204) and the other side is connected to the limit buckle (205); a bearing (8) is embedded in the extension part (204); an eccentric shaft (6) embedded in the bearing (8) is sleeved on the motor shaft (5) in the machine body (1).

3. A grinding tool power output protection mechanism as claimed in claim 2, characterized in that: The extension portion (204) is interference fit with the assembly cavity (7).

4. A grinding tool power output protection mechanism as claimed in claim 3, characterized in that: The end of the motor shaft (5) is threadedly connected to a locking bolt (11) for tightening the eccentric shaft (6).

5. A grinding tool power output protection mechanism as claimed in claim 4, characterized in that: The annular plate (201) is connected to the machine body (1) via fixing bolts (9).

6. A grinding tool power output protection mechanism as claimed in claim 4 or 5, characterized in that: The protective cover (3) comprises a cover body (302) and a locking buckle (301) connected to the cover body (302); the locking buckle (301) passes through a locking opening (202) provided on the annular plate (201) so as to enable the protective cover (3) to move axially relative to the annular plate (201); the locking opening (202) is arranged corresponding to an embedded groove (203) axially provided on the extension portion (204) so ​​that the locking buckle (301) is hidden in the embedded groove (203); and the buckle extension hole (305) is located on the cover body (302).

7. A grinding tool power output protection mechanism as claimed in claim 6, characterized in that: The spring (4) is sleeved on the locking buckle (301).

8. A grinding tool power output protection mechanism as claimed in claim 7, characterized in that: The protective cover (3) is provided with a guide groove (303) coaxially arranged with the locking buckle (301), and one end of the spring (4) is inserted into the guide groove (303).

9. A grinding tool power output protection mechanism as claimed in claim 8, characterized in that: The protective cover (3) is provided with a through hole (304) facing the locking bolt (11).

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