Pneumatic angle grinder

Abstract

The utility model belongs to the technical field of angle grinders, and particularly relates to a pneumatic angle grinder which comprises a driving motor, a power line is arranged at one end of the driving motor, an angle grinder replacement head is arranged at the other end of the driving motor, a replacement sliding assembly is arranged on one side of the top of the angle grinder replacement head, and a grinding piece is arranged below the angle grinder replacement head. And the output end of the driving motor is fixedly connected with a transmission column corresponding to the interior of the angle grinder replacement head. According to the utility model, through the design of the limiting block, when the pressing keycap is pressed, the limiting block can carry out rotation limiting on the frosted sheet, and the pressing keycap can be pressed for a long time by directly pressing the pressing keycap by sliding and replacing the sliding assembly, so that the frosted sheet is convenient to replace; meanwhile, by arranging the limiting key cap, the sliding assembly can be limited and prevented from sliding after the sliding assembly is replaced in a sliding mode, and therefore accidental rotation of the frosted piece caused by misoperation is prevented.

Description

Technical Field

[0001] This utility model belongs to the field of angle grinder technology, specifically relating to a pneumatic angle grinder. Background Technology

[0002] A pneumatic angle grinder is an angle grinder tool powered by compressed air, widely used in industrial fields, especially in metal processing, pre- and post-weld cleaning, surface grinding, and polishing. Compared to electric angle grinders, pneumatic angle grinders typically offer higher work efficiency, lighter weight, and lower heat generation during prolonged use, making them the preferred tool for industrial environments requiring high-intensity, high-continuity operation.

[0003] Problems with existing technology:

[0004] When changing the grinding wheel on an existing angle grinder, the grinding disc is usually stopped by pressing the limit button on the top of the grinder and then the grinding wheel is removed using a U-wrench. This process often involves holding the limit button with one hand and turning the wrench with the other, which is very inconvenient due to the effort required. Moreover, it is extremely dangerous to accidentally start the angle grinder while turning the wrench. Utility Model Content

[0005] The purpose of this utility model is to provide a pneumatic angle grinder that can limit the rotation of the grinding disc when the keycap is pressed by a limiting block design. Alternatively, the sliding component can be directly replaced by pressing it on the keycap for an extended period of time to facilitate the replacement of the grinding disc. At the same time, the limiting keycap can limit the sliding component after it is replaced to prevent it from sliding, thereby preventing accidental rotation of the grinding disc due to misoperation.

[0006] The specific technical solution adopted by this utility model is as follows:

[0007] A pneumatic angle grinder includes: a drive motor, a power cord at one end of the drive motor, an angle grinder replacement head at the other end of the drive motor, a replacement sliding assembly at the top side of the angle grinder replacement head, and a grinding disc at the bottom of the angle grinder replacement head.

[0008] The output end of the drive motor is fixedly connected to the inside of the angle grinder replacement head. A horizontal fixing plate is fixedly connected to the angle grinder replacement head above the transmission column. A pressing keycap is vertically slidably installed on the angle grinder replacement head above the horizontal fixing plate. A limit block is fixedly connected below the pressing keycap. The limit block extends to the lower part of the horizontal fixing plate. A polygonal limit post is fixedly connected to the transmission column at the position corresponding to the limit block. A return spring is fixedly connected between the pressing keycap and the horizontal fixing plate.

[0009] The angle grinder replacement head is provided with an arc-shaped sliding groove corresponding to the position of the replacement sliding assembly, the replacement sliding assembly is slidingly installed in the arc-shaped sliding groove, and the replacement sliding assembly is provided with a pressing groove corresponding to the position of the pressing key cap.

[0010] The end of the transmission column is fixedly connected with a driving bevel gear, the angle grinder replacement head is fixedly connected with a cladding pipe corresponding to the position of the driving bevel gear, a driven bevel gear is rotatably installed in the cladding pipe, the driven bevel gear is meshingly connected with the driving bevel gear, and the end of the driven bevel gear is detachably fixedly installed with the abrasive sheet.

[0011] The top of the replacement sliding assembly is provided with a limiting key cap, the replacement sliding assembly is provided with a limiting groove corresponding to the position of the limiting key cap, the limiting key cap and the limiting groove are vertically slidingly installed, the bottom of the limiting key cap is fixedly connected with a trapezoidal block, and the trapezoidal block and the limiting groove are fixedly connected with a limiting spring.

[0012] The two sides of the trapezoidal block are obliquely slidingly installed with sliding inclined blocks, the side, away from the trapezoidal block, of the sliding inclined block is fixedly connected with a limiting rod, the end of the limiting rod extends to the outside of the replacement sliding assembly and is fixedly connected with a limiting pin, and the limiting rod is slidingly connected with the replacement sliding assembly.

[0013] The inner wall of the angle grinder replacement head is provided with limiting holes at both ends, and the limiting pin and the limiting hole are movably inserted and connected.

[0014] The utility model discloses the technical effect achieved is:

[0015] The utility model discloses, through the design when pressing the pressing key cap, the limiting block can rotate and limit the abrasive sheet, also can directly through the replacement sliding assembly of sliding and press in the upper side of the pressing key cap long -term pressurization to it, in order to the replacement of the abrasive sheet.

[0016] The utility model discloses, through the setting of the limiting key cap, can limit the replacement sliding assembly after sliding and prevent it from sliding, thereby preventing the abrasive sheet from rotating accidentally due to misoperation. DRAWINGS

[0017] Figure 1 It is the whole structure schematic diagram of the utility model, and

[0018] Figure 2 It is the structure enlarged view of the angle grinder replacement head in the utility model,

[0019] Figure 3 It is the internal structure schematic diagram of the angle grinder replacement head in the utility model,

[0020] Figure 4 It is the structure sectional view of the angle grinder replacement head in the utility model, and

[0021] Figure 5 is the structure diagram of the replacement sliding assembly in the utility model;

[0022] Figure 6 is the structure section view of the replacement sliding assembly in the utility model;

[0023] Figure 7 is the structure diagram of the limiting key cap in the utility model;

[0024] Figure 8 is the structure disassembly diagram of the sliding inclined block in the utility model;

[0025] Figure 9 is the structure disassembly diagram of the arc-shaped sliding groove in the utility model.

[0026] In the drawings, the component list represented by each reference numeral is as follows:

[0027] 1, drive motor; 2, power cord; 3, angle grinder replacement head; 4, replacement sliding assembly; 5, abrasive disc; 301, driving bevel gear; 302, driven bevel gear; 303, pressing key cap; 304, transverse fixing plate; 305, return spring; 306, polygonal limiting column; 307, transmission column; 308, limiting block; 309, cladding tube; 401, limiting key cap; 402, limiting pin; 405, trapezoidal block; 406, pressing groove; 407, limiting spring; 408, limiting rod; 409, sliding inclined block; 410, limiting hole. DETAILED DESCRIPTION

[0028] In order to make the purpose and advantages of the utility model more clear and explicit, the utility model is specifically described below in combination with examples. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model, and does not strictly limit the specific protection scope requested by the utility model.

[0029] As Figures 1-2 shown, a pneumatic angle grinder comprises: a drive motor 1, one end of the drive motor 1 is provided with a power cord 2, the other end of the drive motor 1 is provided with an angle grinder replacement head 3, one side position of the top of the angle grinder replacement head 3 is provided with a replacement sliding assembly 4, and a position below the angle grinder replacement head 3 is provided with an abrasive disc 5.

[0030] Among them, when starting the angle grinder to polish, a pneumatic motor is arranged inside the drive motor 1 to provide power for the whole device, the power cord 2 is used to connect the power supply, and the abrasive disc 5 is used to polish; when the abrasive disc 5 needs to be replaced, the replacement sliding assembly 4 is slid to limit the abrasive disc 5, so that the abrasive disc 5 can be replaced, and during the replacement, the abrasive disc 5 cannot rotate without sliding the replacement sliding assembly 4 again to ensure its safety.

[0031] Refer to the drawings Figures 3-4 The output end of the driving motor 1 is fixedly connected with a transmission column 307 corresponding to the inside of the angle grinder changing head 3. The angle grinder changing head 3 is fixedly connected with a transverse fixed plate 304 corresponding to the position above the transmission column 307. The angle grinder changing head 3 is vertically slidingly installed with a pressing key cap 303 corresponding to the position above the transverse fixed plate 304. The pressing key cap 303 is fixedly connected with a limiting block 308 below. The limiting block 308 extends to the position below the transverse fixed plate 304. The transmission column 307 is fixedly connected with a polygonal limiting column 306 corresponding to the position of the limiting block 308. The pressing key cap 303 and the transverse fixed plate 304 are fixedly connected with a return spring 305. The end of the transmission column 307 is fixedly connected with a driving bevel gear 301. The angle grinder changing head 3 is fixedly connected with a cladding pipe 309 corresponding to the position of the driving bevel gear 301. The cladding pipe 309 is rotatably installed with a driven bevel gear 302 inside. The driven bevel gear 302 is meshingly connected with the driving bevel gear 301. The end of the driven bevel gear 302 is fixedly and detachably installed with the abrasive sheet 5.

[0032] According to the above structure, when the abrasive sheet 5 needs to be replaced, the limiting block 308 is moved downward by pressing the pressing key cap 303 so that the polygonal limiting column 306 is contacted. Since the polygonal limiting column 306 is polygonal and the limiting block 308 is rectangular, when the two are in close contact, one face of the polygonal limiting column 306 will be closely fitted with the limiting block 308, so that the transmission column 307 cannot be rotated, achieving the purpose of limiting the rotation of the abrasive sheet 5. When the abrasive sheet 5 cannot be rotated, it can be replaced by the U-shaped wrench. If it is not easy to operate with one hand, the replacement sliding assembly 4 can be replaced by sliding horizontally so that the replacement sliding assembly 4 is pressed above the position of the pressing key cap 303. Since the side of the replacement sliding assembly 4 close to the pressing key cap 303 is arc-shaped, as long as the limiting of the replacement sliding assembly 4 by the limiting key cap 401 is released, the replacement sliding assembly 4 can be directly slid to above the pressing key cap 303.

[0033] Refer to the drawings Figures 5-9The angle grinder replacement head 3 has an arc-shaped groove corresponding to the position of the replacement sliding component 4. The replacement sliding component 4 is slidably installed inside the arc-shaped groove. The replacement sliding component 4 has a pressing groove 406 corresponding to the position of the pressing keycap 303. A limit keycap 401 is provided on the top of the replacement sliding component 4. A limit groove is provided on the replacement sliding component 4 corresponding to the position of the limit keycap 401. The limit keycap 401 is vertically slidably installed in the limit groove. A trapezoidal block 405 is fixedly connected to the bottom of the limit keycap 401. A limiting spring 407 is fixedly connected between the 5 and the limiting groove; sliding blocks 409 are obliquely slidably installed on both sides of the trapezoidal block 405, and a limiting rod 408 is fixedly connected to the side of the sliding block 409 away from the trapezoidal block 405. The end of the limiting rod 408 extends to the outside of the replacement sliding assembly 4 and is fixedly connected to a limiting pin 402. The limiting rod 408 is slidably connected to the replacement sliding assembly 4; limiting holes 410 are opened at both ends of the inner wall of the angle grinder replacement head 3, and the limiting pin 402 is movably inserted into the limiting hole 410.

[0034] According to the above structure, when the limit keycap 401 is pressed, the limit keycap 401 will drive the trapezoidal block 405 to move downward and compress the limit spring 407. At this time, the sliding blocks 409 on both sides slide obliquely upward along the two sides of the trapezoidal block 405, so that the limit pin 402 retracts inward under the influence of the movement of the limit rod 408, thereby moving away from one end limit hole 410. When the replacement sliding component 4 slides above the limit keycap 401, the limit rod 408 reaches the position of the other end limit hole 410. Under the action of the limit spring 407, the trapezoidal block 405 resets. At this time, the limit pin 402 extends to both sides and inserts into the other end limit hole 410, realizing the limit of the replacement sliding component 4.

[0035] The utility model discloses a working principle is: when starting angle grinder to polish, drive motor 1 inside is provided with pneumatic motor for the whole device provides power, power cord 2 is used for connecting power, and the sanding piece 5 is used to polish, when needing to replace the sanding piece 5, through the sliding replacement sliding assembly 4 to the sanding piece 5 is limited to replace the sanding piece 5, when needing to replace the sanding piece 5, through pressing press key cap 303 makes the spacing block 308 move downward to polygonal limiting column 306 contact, because polygonal limiting column 306 is polygonal and spacing block 308 is rectangle, when the both close contact polygonal limiting column 306 one face will be closely combined with spacing block 308, thereby make transmission column 307 unable to rotate, reach the purpose of limiting the rotation of sanding piece 5, when sanding piece 5 cannot rotate, can replace it through U-shaped wrench, if because one hand is not easy to operate, can replace sliding assembly 4 through horizontal sliding and make replacement sliding assembly 4 press on the upper position of press key cap 303, because the side of replacement sliding assembly 4 close to press key cap 303 is arc, just press spacing key cap 401 and remove the spacing of replacement sliding assembly 4, directly slide replacement sliding assembly 4 to press key cap 303 upper position, under the condition that replacement sliding assembly 4 is not slid again, sanding piece 5 cannot rotate to guarantee its safety.

[0036] The above is only the preferred implementation of the utility model, it should be pointed out, for ordinary technical personnel in the prior art, without departing from the principle of the utility model, can make a number of improvements and refinements, these improvements and refinements also should be considered the protection scope of the utility model. The structure, device and operation method not specifically described and explained in the utility model, are implemented according to conventional means in the art, unless specifically stated and limited.

Claims

1. An air angle grinder characterized by, Include: The driving motor (1) is provided with power line (2) on one end, the other end of the driving motor (1) is provided with angle grinding replacement head (3), the top side of angle grinding replacement head (3) is provided with replacement sliding assembly (4), the lower position of angle grinding replacement head (3) is provided with grinding disc (5); The output end of the driving motor (1) is fixedly connected with a transmission column (307) corresponding to the inside of the angle grinding replacement head (3), a transverse fixed plate (304) is transversely fixedly connected to the position above the transmission column (307) of the angle grinding replacement head (3), a press key cap (303) is vertically slidingly installed on the position above the transverse fixed plate (304) of the angle grinding replacement head (3), a limit block (308) is fixedly connected below the press key cap (303), the limit block (308) extends to the lower position of the transverse fixed plate (304), a polygonal limit column (306) is fixedly connected to the position corresponding to the limit block (308) of the transmission column (307), a return spring (305) is fixedly connected between the press key cap (303) and the transverse fixed plate (304). The angle grinding replacement head (3) is provided with an arc-shaped sliding groove corresponding to the position of the replacement sliding assembly (4), the replacement sliding assembly (4) is slidingly installed in the arc-shaped sliding groove, and the replacement sliding assembly (4) is provided with a pressing groove (406) corresponding to the position of the press key cap (303).

2. The pneumatic angle grinder according to claim 1, characterized in that: The end of the transmission column (307) is fixedly connected with a driving bevel gear (301), the angle grinding replacement head (3) is fixedly connected with a cladding pipe (309) corresponding to the position of the driving bevel gear (301), a driven bevel gear (302) is rotatably installed in the inside of the cladding pipe (309), the driven bevel gear (302) is meshingly connected with the driving bevel gear (301), and the end of the driven bevel gear (302) is detachably fixedly installed with the grinding disc (5).

3. The pneumatic angle grinder of claim 1, wherein: The top of the replacement sliding assembly (4) is provided with a limit key cap (401), the replacement sliding assembly (4) is provided with a limit slot corresponding to the position of the limit key cap (401), the limit key cap (401) and the limit slot are vertically slidingly installed, the bottom of the limit key cap (401) is fixedly connected with a trapezoidal block (405), and the limit key cap (401) and the limit slot are fixedly connected with a limit spring (407).

4. The pneumatic angle grinder of claim 3, wherein: The two sides of the trapezoidal block (405) are obliquely slidingly installed with sliding inclined blocks (409), the side away from the trapezoidal block (405) of the sliding inclined block (409) is fixedly connected with a limit rod (408), the end of the limit rod (408) extends to the outside of the replacement sliding assembly (4) and is fixedly connected with a limit pin (402), and the limit rod (408) is slidingly connected with the replacement sliding assembly (4).

5. The pneumatic angle grinder of claim 4, wherein: The inner wall of the angle grinding replacement head (3) is provided with a limit hole (410) at both ends, and the limit pin (402) and the limit hole (410) are movably insertedly connected.

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