Handheld grinding machine stable in machining

Abstract

The handheld grinding machine comprises a grinding machine body, the output end of the grinding machine body is in transmission connection with a rotating head, the bottom end of the rotating head is fixedly connected with a grinding piece, and a protective cover is fixedly connected to the outer surface of the grinding machine body and located at the position of the grinding piece. A storage groove is formed in the bottom end of the protection cover, and a positioning ring is arranged in the storage groove in a sliding mode. In the process that a welding spot is polished through the polishing piece, the positioning ring contracts towards the interior of the containing groove under the action of pressure, and when the top end of the positioning ring makes contact with the bottom ends of the three adjusting bolts, the positioning ring is blocked, so that the polishing piece is limited by the positioning ring and cannot make contact with a polishing face continuously; the grinding depth of the grinding piece is positioned, the situation of excessive grinding or insufficient grinding is prevented, and the grinding precision and the grinding efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of polishing machine technology, specifically a handheld polishing machine with stable processing capabilities. Background Technology

[0002] A polishing machine is a mechanical device used to polish and grind the surface of objects. It uses an electric motor to drive the grinding disc to rotate, and uses abrasive to grind the surface of the object, thereby removing surface defects, oxide layers and dirt, making the surface of the object smoother, flatter and shinier. It is widely used in industrial fields such as machining, automobile manufacturing, aerospace, construction, electronics, furniture manufacturing and so on. A handheld polishing machine usually consists of an electric motor, a handle and a grinding head. It is small in size and easy to operate, and is suitable for fine polishing and finishing of small objects.

[0003] In the prior art, such as Chinese patent CN219819227U, a "handheld grinder" is disclosed, which includes a body assembly and a dustproof assembly. The body assembly includes a handle and a protective cover. One end of the handle is connected to a grinder head, and the top of the grinder head is connected to a spindle lock. One end of the handle is connected to an extension grip. The dustproof assembly includes a barrier bar and a dust suction hood. The top of the dust suction hood is connected to a dust suction base, and the top of the protective cover is connected to a storage cylinder. The inner wall of the storage cylinder is connected to a filter screen, and the lower end of the storage cylinder is connected to a connecting sleeve.

[0004] When handheld grinders are used to grind weld points on the surface of objects, the weld points are slightly higher than the surface of the workpiece. In actual weld point grinding operations, the operator needs to control the grinding disc to move towards the surface of the object. If the moving distance is too large, it is easy to form pits on the surface of the workpiece. If the moving distance is too small, the weld points will still be on the surface of the workpiece, and grinding will be required again. This requires the operator to spend more time and effort during grinding, which reduces the efficiency of grinding. Utility Model Content

[0005] The purpose of this invention is to provide a handheld grinder with stable processing capabilities to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a handheld grinder with stable processing capabilities, comprising a grinder body, a rotating head connected to the output end of the grinder body, a grinding disc fixedly connected to the bottom end of the rotating head, a protective cover fixedly connected to the outer surface of the grinder body at the position of the grinding disc, a storage groove at the bottom end of the protective cover, a positioning ring slidably disposed inside the storage groove, and three threaded holes penetrating the top end of the protective cover at the position of the storage groove, each of the three threaded holes being threadedly connected to an adjusting bolt, the bottom ends of the three adjusting bolts abutting against the top end of the positioning ring.

[0007] As a further preferred embodiment of this technical solution, an air extraction pipe is fixedly connected to the outer surface of the protective cover, and an air extraction pump is fixedly connected to the other end of the air extraction pipe. The bottom end of the air extraction pump is fixedly connected to the outer surface of the grinding machine body, and a collection box is fixedly connected to the output end of the air extraction pump. The bottom end of the collection box is fixedly connected to the outer surface of the grinding machine body, and a dust cover is provided at the exhaust port of the collection box.

[0008] As a further preferred embodiment of this technical solution, a square groove is formed on the outer surface of the collection box at the location of the exhaust port. A rotating sleeve is rotatably connected inside the square groove. The rotating sleeve is inserted into the bottom end of the dust cover. A slot is formed at the top of the square groove. The slot is inserted into the top of the dust cover. A support plate is slidably arranged inside the rotating sleeve. The top of the support plate abuts against the bottom end of the dust cover. Multiple compression springs are fixedly connected to the bottom surface inside the rotating sleeve. The tops of the multiple compression springs abut against the bottom end of the support plate.

[0009] As a further preferred embodiment of this technical solution, the rotating sleeve has through holes on both sides, and the support plate has fixed blocks at both ends, with the outer surfaces of the two limit blocks slidably connected to the interior of the two limit holes respectively.

[0010] As a further preferred embodiment of this technical solution, a plurality of positioning posts are fixedly connected to the top surface inside the storage slot, a plurality of positioning through holes are opened through the top of the positioning ring, the bottom ends of the plurality of positioning posts are respectively inserted into the interior of the plurality of positioning through holes, and a reset spring is sleeved on the outer surface of the plurality of positioning posts.

[0011] As a further preferred embodiment of this technical solution, each of the inner surfaces of the plurality of positioning through holes is provided with a limiting groove, and each of the bottom ends of the plurality of positioning posts is fixedly connected with a limiting block, and the outer surfaces of the plurality of limiting blocks are respectively slidably connected to the interior of the plurality of limiting grooves.

[0012] As a further preferred embodiment of this technical solution, a handle is fixedly connected to one side of the grinder body, and an anti-slip sleeve is fitted onto the outer surface of the handle.

[0013] This utility model provides a handheld grinder with stable processing capabilities, which has the following beneficial effects:

[0014] (1) During the grinding process of the welding point by the grinding disc, the positioning ring is compressed into the receiving groove under pressure. When the top of the positioning ring contacts the bottom of the three adjusting bolts, the positioning ring is blocked, so that the grinding disc is restricted by the positioning ring and cannot continue to contact the grinding surface. This realizes the positioning of the grinding depth of the grinding disc, prevents over-grinding or insufficient grinding, and improves the grinding accuracy and grinding efficiency.

[0015] (2) This utility model uses an air pump to draw the dust generated inside the protective cover into the collection box and discharge it to the outside. During the discharge process, the dust cover blocks the dust in the air and stores it in the collection box, thus realizing the collection and isolation of dust and effectively improving the working environment of the staff.

[0016] (3) This utility model allows the dust cover to slide into the rotating sleeve by bending it, so that the top of the dust cover can be removed from the slot, thus releasing the restriction on the dust cover. Then, rotating the rotating sleeve will drive the filter screen to be removed from the square slot, thereby realizing the quick replacement of the dust cover and the cleaning of the dust in the collection box. The structure is simple, the operation is convenient, and the replacement and cleaning efficiency is improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is an exploded view of the protective cover structure of this utility model;

[0019] Figure 3 This is an exploded view of the internal structure of the protective cover of this utility model;

[0020] Figure 4 This is an exploded view of the structure between the rotating sleeve and the dust cover of this utility model.

[0021] In the diagram: 1. Grinding machine body; 2. Rotating head; 3. Grinding disc; 4. Protective cover; 5. Storage slot; 6. Positioning ring; 7. Threaded hole; 8. Adjusting bolt; 9. Positioning pin; 10. Positioning through hole; 11. Return spring; 12. Limiting block; 13. Limiting groove; 14. Air extraction pipe; 15. Air extraction pump; 16. Collection box; 17. Square groove; 18. Rotating sleeve; 19. Dust cover; 20. Support plate; 21. Compression spring; 22. Limiting block; 23. Limiting through hole; 24. Slot; 25. Handle; 26. Anti-slip sleeve. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] This utility model provides a technical solution: such as Figure 1-3As shown in this embodiment, a handheld grinder with stable processing capabilities includes a grinder body 1. A rotating head 2 is drivenly connected to the output end of the grinder body 1. A grinding disc 3 is fixedly connected to the bottom end of the rotating head 2. A protective cover 4 is fixedly connected to the outer surface of the grinder body 1 at the position of the grinding disc 3. A storage groove 5 is opened at the bottom end of the protective cover 4. A positioning ring 6 is slidably arranged inside the storage groove 5. Three threaded holes 7 are opened through the top of the protective cover 4 at the position of the storage groove 5. Adjusting bolts 8 are threadedly connected inside the three threaded holes 7. The bottom ends of the three adjusting bolts 8 abut against the top end of the positioning ring 6. By setting the protective cover 4, the grinding disc 3 can be sealed and protected, and dust generated during grinding can be prevented from splashing. By setting the positioning ring 6, the grinding depth of the grinding disc 3 can be limited by cooperating with the adjusting bolts 8, thereby improving the grinding accuracy.

[0024] like Figure 1 and Figure 4 As shown, an air extraction pipe 14 is fixedly connected to the outer surface of the protective cover 4, and an air pump 15 is fixedly connected to the other end of the air extraction pipe 14. The bottom end of the air pump 15 is fixedly connected to the outer surface of the grinder body 1, and a collection box 16 is fixedly connected to the output end of the air pump 15. The bottom end of the collection box 16 is fixedly connected to the outer surface of the grinder body 1, and a dust cover 19 is provided at the exhaust port of the collection box 16. By setting the air extraction pipe 14, dust inside the protective cover 4 can be discharged through cooperation with the air pump 15. By setting the collection box 16 and the dust cover 19, dust in the air can be collected, improving the quality of the working environment.

[0025] like Figure 4 As shown, a square groove 17 is provided on the outer surface of the collection box 16 at the exhaust port. A rotating sleeve 18 is rotatably connected inside the square groove 17. The inside of the rotating sleeve 18 is inserted into the bottom end of the dust cover 19. A slot 24 is provided at the top of the inside of the square groove 17. The inside of the slot 24 is inserted into the top of the dust cover 19. A support plate 20 is slidably arranged inside the rotating sleeve 18. The top of the support plate 20 abuts against the bottom end of the dust cover 19. Multiple pressure springs 21 are fixedly connected to the bottom surface inside the rotating sleeve 18. The tops of the multiple pressure springs 21 abut against the bottom end of the support plate 20. By setting the rotating sleeve 18, the dust cover 19 can be positioned. By setting the pressure springs 21, a stable force can be provided for the dust cover 19, so that it can be stably inserted into the slot 24.

[0026] like Figure 4 As shown, the rotating sleeve 18 has through holes 23 on both sides, and the support plate 20 has fixed blocks 22 at both ends. The outer surfaces of the two blocks 22 are slidably connected to the inside of the two through holes 23. By setting the through holes 23 and the blocks 22, the support plate 20 can be positioned to prevent it from falling off and improve its stability.

[0027] like Figure 2 and Figure 3 As shown, multiple positioning posts 9 are fixedly connected to the top surface inside the storage slot 5. Multiple positioning through holes 10 are opened through the top of the positioning ring 6. The bottom ends of the multiple positioning posts 9 are respectively inserted into the multiple positioning through holes 10. A reset spring 11 is sleeved on the outer surface of the multiple positioning posts 9. By setting the positioning posts 9, the positioning ring 6 can be prevented from tilting during the movement, thus improving stability.

[0028] like Figure 2 and Figure 3 As shown, a limiting groove 13 is provided on the inner surface of multiple positioning through holes 10, and a limiting block 12 is fixedly connected to the bottom end of multiple positioning posts 9. The outer surface of multiple limiting blocks 12 is slidably connected to the inside of multiple limiting grooves 13. By setting the limiting grooves 13 and limiting blocks 12, the positioning ring 6 can be prevented from falling out of the storage groove 5.

[0029] like Figure 1 As shown, a handle 25 is fixedly connected to one side of the grinder body 1. An anti-slip sleeve 26 is fitted onto the outer surface of the handle 25. By setting the handle 25, it is convenient for the user to grip the grinder body 1, which improves its stability during the grinding process.

[0030] This utility model provides a handheld grinder with stable processing capabilities. Its specific working principle is as follows:

[0031] When grinding the weld points on the surface of an object, the worker first observes the grinding location to determine the grinding depth. Then, based on the grinding depth, the worker adjusts the positions of the three adjusting bolts 8 in the receiving groove 5. After adjustment, the worker starts the grinding machine body 1 to grind the area. During grinding, the positioning ring 6 is subjected to pressure and retracts into the receiving groove 5. When the top of the positioning ring 6 contacts the bottom of the three adjusting bolts 8, the positioning ring 6 is blocked, preventing the grinding disc 3 from continuing to contact the grinding surface and avoiding over-grinding. During grinding, the air pump 15... Dust generated inside the protective cover 4 is drawn into the collection box 16 and discharged to the outside. During the discharge process, the dust cover 19 blocks the dust in the air and stores it in the collection box 16. When it is necessary to discharge the dust in the collection box 16 or replace and clean the dust cover 19, the dust cover 19 is slid into the rotating sleeve 18, so that the top of the dust cover 19 is removed from the slot 24, releasing the restriction on the dust cover 19. Then, the rotating sleeve 18 is rotated to move the dust cover 19 out of the square slot 17, thus realizing the cleaning of the inside of the collection box 16 and the replacement of the dust cover 19.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A handheld grinder with stable processing capabilities, comprising a grinder body (1), characterized in that: The output end of the grinding machine body (1) is connected to a rotating head (2). The bottom end of the rotating head (2) is fixedly connected to a grinding disc (3). A protective cover (4) is fixedly connected to the outer surface of the grinding machine body (1) at the position of the grinding disc (3). A storage groove (5) is opened at the bottom end of the protective cover (4). A positioning ring (6) is slidably arranged inside the storage groove (5). Three threaded holes (7) are opened through the top of the protective cover (4) at the position of the storage groove (5). Adjusting bolts (8) are threadedly connected inside the three threaded holes (7). The bottom ends of the three adjusting bolts (8) abut against the top end of the positioning ring (6).

2. The handheld grinder with stable processing according to claim 1, characterized in that: The outer surface of the protective cover (4) is fixedly connected to an air extraction pipe (14), and the other end of the air extraction pipe (14) is fixedly connected to an air extraction pump (15). The bottom end of the air extraction pump (15) is fixedly connected to the outer surface of the grinding machine body (1). The output end of the air extraction pump (15) is fixedly connected to a collection box (16). The bottom end of the collection box (16) is fixedly connected to the outer surface of the grinding machine body (1). The exhaust port of the collection box (16) is provided with a dust cover (19).

3. The handheld grinder with stable processing according to claim 2, characterized in that: A square groove (17) is provided on the outer surface of the collection box (16) at the exhaust port. A rotating sleeve (18) is rotatably connected inside the square groove (17). The inside of the rotating sleeve (18) is inserted into the bottom end of the dust cover (19). A slot (24) is provided at the top of the inside of the square groove (17). The inside of the slot (24) is inserted into the top of the dust cover (19). A support plate (20) is slidably arranged inside the rotating sleeve (18). The top of the support plate (20) abuts against the bottom end of the dust cover (19). A plurality of pressure springs (21) are fixedly connected to the bottom surface inside the rotating sleeve (18). The tops of the plurality of pressure springs (21) abut against the bottom end of the support plate (20).

4. The handheld grinder with stable processing according to claim 3, characterized in that: The rotating sleeve (18) has through holes (23) on both sides, and the support plate (20) has fixed blocks (22) at both ends. The outer surfaces of the two blocks (22) are slidably connected to the inside of the two through holes (23).

5. A handheld grinder with stable processing according to claim 1, characterized in that: Multiple positioning posts (9) are fixedly connected to the top surface inside the storage slot (5). Multiple positioning through holes (10) are opened through the top of the positioning ring (6). The bottom ends of the multiple positioning posts (9) are respectively inserted into the multiple positioning through holes (10). A reset spring (11) is sleeved on the outer surface of the multiple positioning posts (9).

6. A handheld grinder with stable processing according to claim 5, characterized in that: Each of the multiple positioning through holes (10) has a limiting groove (13) on its inner surface, and each of the multiple positioning posts (9) has a limiting block (12) fixedly connected to its bottom end. The outer surfaces of the multiple limiting blocks (12) are slidably connected to the interior of the multiple limiting grooves (13).

7. A handheld grinder with stable processing according to claim 6, characterized in that: A handle (25) is fixedly connected to one side of the grinder body (1), and an anti-slip sleeve (26) is fitted onto the outer surface of the handle (25).

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