An angle grinder

Abstract

The application discloses an angle grinder, which comprises a cutting unit, a cleaning unit and a heat dissipation unit, the cutting unit comprises a motor, the motor is a double-shaft motor, the shaft end of the motor is fixedly connected with a first bevel gear, the first bevel gear is meshingly connected with a second bevel gear on one side, and the second bevel gear is fixedly connected with a grinding disc on one end; the cleaning unit comprises a propeller blade, one side of the propeller blade is provided with a transmission belt, a plurality of plate teeth are fixedly connected outside the transmission belt, and the interval between two adjacent plate teeth is matched with the pitch between the propeller blades; and the heat dissipation unit comprises a fan blade. When the cutting work is carried out through the application, the powder generated during cutting can be effectively cleaned and collected, the problem that the powder is easily inhaled by workers due to the powder being raised during cutting is greatly reduced, and the grinding disc can be freely telescopic, so that the danger caused by the exposed grinding disc during idling can be avoided as much as possible.

Description

Technical Field

[0001] This invention relates to the field of angle grinders, and more particularly to an angle grinder. Background Technology

[0002] Angle grinders are mainly used for grinding and cutting metals, glass, and stone. They achieve grinding and cutting by having a high-speed rotating grinding wheel come into contact with the object to be cut.

[0003] Angle grinders easily produce powdery waste during cutting, and the powder is easily thrown into the air by the high-speed rotation of the grinding wheel. This not only reduces the air quality for operators and may cause respiratory diseases, but also makes it difficult to clean up after the work is finished. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this section, the abstract and title of the invention. Such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0006] Therefore, the technical problem to be solved by the present invention is to add a cleaning mechanism to the angle grinder so that the powder is collected when the angle grinder is working, thereby greatly reducing the amount of powder that diffuses into the air.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an angle grinder, comprising,

[0008] The cutting unit includes a motor, which is a dual-axis motor. A first bevel gear is fixedly connected to the shaft end of the motor, and a second bevel gear is meshed with one side of the first bevel gear. A grinding disc is fixedly connected to one end of the second bevel gear.

[0009] The cleaning unit includes a propeller blade, a transmission belt is provided on one side of the propeller blade, and multiple toothed plates are fixedly connected to the outer side of the transmission belt. The distance between two adjacent toothed plates is adapted to the pitch between the propeller blades.

[0010] The device also includes a heat dissipation unit, which includes fan blades. Both ends of the fan blades are fixedly connected to a third connecting shaft, and one end of the third connecting shaft is fixedly connected to the shaft end of the motor.

[0011] As an improvement of the present invention, a third bevel gear is meshed with one side of the second bevel gear, and a first connecting shaft is fixedly connected to one end of the third bevel gear. A second bracket is rotatably connected to both ends of the first connecting shaft. A fixed shaft is rotatably connected to the end of the second bevel gear away from the grinding plate. A first bracket is rotatably connected to the shaft end of the motor near the end of the first bevel gear. The same support rod is fixedly connected to the other ends of the first bracket, the fixed shaft, and the second bracket. A first housing is fixedly connected to the outside of the support rod. The two ends of the first housing are fixedly connected to the first bracket and the second bracket, respectively. A support cylinder is fixedly connected to one end of the first housing, and a shock-absorbing pad is movably sleeved on the outside of the support cylinder.

[0012] As an improvement of the present invention, a worm is fixedly connected to the first connecting shaft, and a first bearing is fixedly connected to both ends of the worm. A worm wheel is meshed with one side of the worm, and a second bearing is fixedly connected to both ends of the worm wheel. A fixing plate is fixedly connected to the other end of the second bearing, and the other end of the fixing plate is fixedly connected to the outer ring of the first bearing. The second connecting shaft is slidably connected through both ends of the worm wheel.

[0013] As an improvement of the present invention, a protrusion is fixedly connected to one side of the second connecting shaft, and the protrusion passes through the worm gear together with the second connecting shaft. A support seat is fixedly connected to the end of the second connecting shaft. A first gear is fixedly connected to the top of the support seat at the end of the second connecting shaft, and a transmission chain is meshed with the outside of the first gear.

[0014] As an improvement of the present invention, a second slide rod is fixedly connected to the other end of the first housing, and a first slide rod is slidably connected to both ends of the second slide rod. A protrusion is fixedly connected to the end of the first slide rod, and a spring is movably sleeved on the first slide rod, with both ends of the spring respectively fixedly connected to the bottom of the second slide rod and the top of the protrusion.

[0015] As an improvement of the present invention, a second housing is provided on the outer side of the grinding disc, and guide plates are fixedly connected to both sides of the second housing at the shaft end of the grinding disc. A third housing is fixedly connected to the other side of the second housing, and the propeller blade is located inside the third housing. A fourth housing is fixedly connected to one side of the third housing, and the transmission belt is located inside the fourth housing. A fifth housing is fixedly connected to one side of the fourth housing at the top of the third housing, and a cleaning brush is rotatably connected inside the fifth housing. The second housing, the third housing, the fourth housing, and the fifth housing are interconnected, and a base is fixedly connected to the bottom of the second housing, the third housing, and the fourth housing. The other end of the support base is fixedly connected to one side of the base.

[0016] As an improvement of the present invention, the two ends of the inner sides of the fourth housing are fixedly connected to fixed columns, and rollers are rotatably connected to the fixed columns. The rollers are provided with annular grooves, and the transmission belt is tumblingly connected to the rollers through the annular grooves. The two ends of the fixed columns are fixedly connected to the first connecting plates, and the inner side of the first connecting plates is fixedly connected to the second connecting plate.

[0017] As an improvement of the present invention, the width of the second connecting plate is adapted to the width of the transmission belt, and the distance between the two second connecting plates is adapted to the thickness of the transmission belt. A fourth bevel gear is fixedly connected to the top of the propeller blade, and a fifth bevel gear is meshed with one side of the fourth bevel gear. One end of the fifth bevel gear is fixedly connected to one end of the cleaning brush. A second gear is fixedly connected to the end of the propeller blade, and one side of the second gear is meshed with the other end of the transmission chain. The bottom of the second gear is rotatably connected to the inside of the base.

[0018] As an improvement of the present invention, a fixing block is fixedly connected to the top of one side of the second housing, and a sliding groove is provided on one side of the fixing block. A slider is slidably connected inside the sliding groove, and a collection box is fixedly connected to one end of the slider. A guide groove is fixedly connected to one end of the collection box. A discharge port is fixedly connected to one side of the fifth housing, and the discharge port communicates with the fifth housing. A rectangular groove is provided at the bottom of the discharge port, and the width of the rectangular groove is adapted to the width of the guide groove.

[0019] As an improvement of the present invention, a fixed frame is fixedly connected inside the support cylinder, the other end of the third connecting shaft is rotatably connected to one end of the fixed frame, and a cover is fixedly connected to the end of the support cylinder, and multiple heat dissipation holes are opened on the side of the cover.

[0020] The beneficial effects of this invention are: when performing cutting work using this invention, the powder generated during cutting can be effectively cleaned and collected, greatly reducing the problem of workers being susceptible to respiratory infections caused by powder being blown up during cutting, and the grinding disc can be freely extended and retracted, minimizing the danger caused by the grinding disc being exposed when idle. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0022] Figure 1 , 2 This is a schematic diagram of the structure of an angle grinder according to one embodiment of the present invention;

[0023] Figure 3This is a schematic diagram of the internal structure of the fourth housing of an angle grinder according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the spring structure of an angle grinder according to an embodiment of the present invention;

[0025] Figure 5 This is an exploded structural diagram of the transmission belt portion of an angle grinder according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the internal structure of the first housing in an angle grinder according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the worm gear structure in an angle grinder according to an embodiment of the present invention;

[0028] Figure 8 , 9 This is a schematic diagram of the collection box portion of an angle grinder according to an embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of the structure of the first gear and the second gear in an angle grinder according to an embodiment of the present invention.

[0030] In the picture:

[0031] 100. Cutting unit; 101. Support cylinder; 102. Shock-absorbing pad; 103. Grinding disc; 104. First housing; 105. Support rod; 106. Motor; 107. First bracket; 108. First bevel gear; 109. Fixed shaft; 110. Second bevel gear; 111. Third bevel gear; 112. Second bracket; 113. First connecting shaft; 114. Worm gear; 115. First bearing; 116. Worm wheel; 117. Second bearing; 118. Fixed plate; 119. Second connecting shaft; 120. Protrusion; 121. First gear; 122. Transmission chain; 123. First slide rod; 124. Second slide rod; 125. Spring; 126. Protrusion; 127. Support seat;

[0032] 200. Cleaning unit; 201. Second housing; 202. Third housing; 203. Fourth housing; 204. Fifth housing; 205. Base; 206. Fixing block; 207. Collection box; 208. Guide groove; 209. Discharge port; 210. Rectangular groove; 211. Slider; 212. Slide groove; 213. Propeller blade; 214. Second gear; 215. Fourth bevel gear; 216. Fifth bevel gear; 217. Cleaning brush; 218. Toothed plate; 219. First connecting plate; 220. Transmission belt; 221. Second connecting plate; 222. Fixing column; 223. Roller; 224. Annular groove; 225. Guide plate;

[0033] 300. Heat dissipation unit; 301. Cover; 302. Heat dissipation hole; 303. Fixing bracket; 304. Third connecting shaft; 305. Fan blade. Detailed Implementation

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] Example 1

[0036] This embodiment provides an angle grinder, comprising,

[0037] The cutting unit 100 includes a motor 106, which is a dual-axis motor. A first bevel gear 108 is fixedly connected to the shaft end of the motor 106, and a second bevel gear 110 is meshed with one side of the first bevel gear 108. A grinding disc 103 is fixedly connected to one end of the second bevel gear 110.

[0038] The cleaning unit 200 includes a propeller blade 213. A transmission belt 220 is provided on one side of the propeller blade 213, and multiple teeth 218 are fixedly connected to the outer side of the transmission belt 220. The distance between two adjacent teeth 218 is adapted to the pitch between the propeller blades 213.

[0039] And a heat dissipation unit 300, which includes a fan blade 305. Both ends of the fan blade 305 are fixedly connected to a third connecting shaft 304, and one end of the third connecting shaft 304 is fixedly connected to the shaft end of the motor 106.

[0040] Reference Figure 2 , 6 The second bevel gear 110 is meshed with a third bevel gear 111 on one side, and a first connecting shaft 113 is fixedly connected to one end of the third bevel gear 111. The two ends of the first connecting shaft 113 are rotatably connected to a second bracket 112. The end of the second bevel gear 110 away from the grinding disc 103 is rotatably connected to a fixed shaft 109. The end of the motor 106 near the shaft end of the first bevel gear 108 is rotatably connected to a first bracket 107. The other ends of the first bracket 107, the fixed shaft 109, and the second bracket 112 are all fixedly connected to the same support rod 105. A first housing 104 is fixedly connected to the outside of the support rod 105. The two ends of the first housing 104 are fixedly connected to the first bracket 107 and the second bracket 112, respectively. A support cylinder 101 is fixedly connected to one end of the first housing 104, and a shock-absorbing pad 102 is movably sleeved on the outside of the support cylinder 101. The support rod 105 is used to provide a support point, and the shock-absorbing pad 102 is used to reduce the vibration generated during cutting.

[0041] Reference Figure 7 ,10 A worm gear 114 is fixedly connected to a first connecting shaft 113, and first bearings 115 are fixedly connected to both ends of the worm gear 114. A worm wheel 116 is meshed with one side of the worm gear 114, and second bearings 117 are fixedly connected to both ends of the worm wheel 116. A fixing plate 118 is fixedly connected to the other end of the second bearing 117, and the other end of the fixing plate 118 is fixedly connected to the outer ring of the first bearing 115. A second connecting shaft 119 is slidably connected through both ends of the worm wheel 116, and a protrusion is fixedly connected to one side of the second connecting shaft 119. 120, and the protrusion 120 passes through the worm gear 116 together with the second connecting shaft 119. The end of the second connecting shaft 119 is fixedly connected to the support seat 127. The end of the second connecting shaft 119 is fixedly connected to the top of the support seat 127. The transmission chain 122 is meshed with the outer side of the first gear 121. Since the outer ring of the first bearing 115 and the end of the second bearing 117 away from the worm gear 116 are both fixedly connected to the fixed plate 118, the worm gear 116 moves down with the worm 114 through the second bearing 117 and the fixed plate 118.

[0042] Reference Figure 4 The other end of the first housing 104 is fixedly connected to a second slide rod 124, and the two ends of the second slide rod 124 are slidably connected to a first slide rod 123. The end of the first slide rod 123 is fixedly connected to a protrusion 126. A spring 125 is movably sleeved on the first slide rod 123, and the two ends of the spring 125 are respectively fixedly connected to the bottom of the second slide rod 124 and the top of the protrusion 126. The cutting unit 100 is moved down by compressing the spring 125. When the operation is completed, the grinding disc 103 is retracted under the action of the spring 125.

[0043] Example 2

[0044] This embodiment is based on the previous embodiment, and differs from the previous embodiment in that:

[0045] Reference Figure 1 , 23. A second housing 201 is provided on the outer side of the grinding disc 103, and guide plates 225 are fixedly connected to both sides of the second housing 201 at the shaft end of the grinding disc 103. A third housing 202 is fixedly connected to the other side of the second housing 201, and a propeller blade 213 is located inside the third housing 202. A fourth housing 203 is fixedly connected to one side of the third housing 202, and a transmission belt 220 is located inside the fourth housing 203. A fifth housing 204 is fixedly connected to one side of the fourth housing 203 at the top of the third housing 202, and a cleaning brush 217 is rotatably connected inside the fifth housing 204. The second housing 201, the third housing 202, the fourth housing 203 and the fifth housing 204 are interconnected, and a base 205 is fixedly connected to the bottom of the second housing 201, the third housing 202 and the fourth housing 203. The other end of the support base 127 is fixedly connected to one side of the base 205. The second housing 201, the third housing 202 and the fifth housing 204 are used to allow powder to flow.

[0046] Reference Figure 3 , 5 The fourth housing 203 has fixed posts 222 fixedly connected to both ends of its interior sides, and rollers 223 are rotatably connected to the fixed posts 222. An annular groove 224 is provided on the rollers 223, and the transmission belt 220 is tumbled onto the rollers 223 through the annular groove 224. First connecting plates 219 are fixedly connected to both ends of the fixed posts 222, and a second connecting plate 221 is fixedly connected to one side of the first connecting plate 219. The width of the second connecting plate 221 matches the width of the transmission belt 220, and the distance between the two second connecting plates 221 matches the thickness of the transmission belt 220. A fourth bevel gear 215 is fixedly connected to the top of the propeller blade 213, and a fifth bevel gear 216 is meshed with one side of the fourth bevel gear 215. One end of the fifth bevel gear 216 is fixedly connected to the cleaning brush. At one end of 217, the end of the propeller blade 213 is fixedly connected to a second gear 214, and one side of the second gear 214 is meshed with the other end of the transmission chain 122. The bottom of the second gear 214 is rotatably connected to the inside of the base 205. The second gear 214 drives the propeller blade 213 to rotate. When the grinding disc 103 performs a cutting operation, the cut powder is thrown by the grinding disc 103 towards the propeller blade 213. The rotation of the propeller blade 213 causes the plate teeth 218 to drive the transmission belt 220 to roll. At the same time, the engagement between the plate teeth 218 and the propeller blade 213 causes the powder to be conveyed to the top by the propeller blade 213. The rotation of the propeller blade 213 drives the fourth bevel gear 215 to rotate. The fourth bevel gear 215 meshes with the fifth bevel gear 216 to rotate, thereby driving the cleaning brush 217 to rotate.

[0047] Reference Figure 8 , 9A fixing block 206 is fixedly connected to the top of one side of the second housing 201, and a sliding groove 212 is opened on one side of the fixing block 206. A slider 211 is slidably connected inside the sliding groove 212, and a collection box 207 is fixedly connected to one end of the slider 211. A guide groove 208 is fixedly connected to one end of the collection box 207. A discharge port 209 is fixedly connected to one side of the fifth housing 204, and the interior of the discharge port 209 is connected to the fifth housing 204. A rectangular groove 210 is opened at the bottom of the discharge port 209, and the width of the rectangular groove 210 is adapted to the guide groove 208. After the powder is conveyed to the top, it is swept into the discharge port 209 by the cleaning brush 217, and enters the collection box 207 through the rectangular groove 210 and the guide groove 208. When the collection box 207 is full of powder, it is slid out through the sliding groove 212 and the powder is poured out. Then the collection box 207 is slid back into the sliding groove 212 and the guide groove 208 is aligned with the rectangular groove 210.

[0048] Example 3

[0049] This embodiment is based on the previous embodiment, and differs from the previous embodiment in that:

[0050] Reference Figure 6 A fixed frame 303 is fixedly connected inside the support cylinder 101. The other end of the third connecting shaft 304 is rotatably connected to one end of the fixed frame 303. A cover 301 is fixedly connected to the end of the support cylinder 101, and multiple heat dissipation holes 302 are opened on the side of the cover 301. The motor 106 rotates and drives the third connecting shaft 304 to rotate, thereby causing the fan blade 305 to rotate and transferring the heat generated by the motor 106 to the cover 301, which is then dissipated through the heat dissipation holes 302.

[0051] In this embodiment, when in use, the motor 106 is started, and the motor 106 drives the first bevel gear 108 to rotate, and through meshing, drives the second bevel gear 110 to rotate, thereby causing the grinding disc 103 to rotate. When operation is required, hold the shock-absorbing pad 102 and let the base 205 press against the object to be cut, and press down the support cylinder 101. At this time, the cutting unit 100 moves down and compresses the spring 125. Since the outer ring of the first bearing 115 and the end of the second bearing 117 away from the worm gear 116 are both fixedly connected to the fixing plate 118, the worm gear 116 moves down with the worm 114 through the second bearing 117 and the fixing plate 118. When the bottom of the grinding disc 103 is lower than the base 205, cutting begins.

[0052] The second bevel gear 110 meshes with the third bevel gear 111, which in turn drives the worm gear 114 to rotate via the first connecting shaft 113. The worm gear 114, in turn, meshes with the worm wheel 116, which in turn drives the worm wheel 116 to rotate. This, in turn, drives the second connecting shaft 119 to rotate. The second connecting shaft 119 drives the first gear 121 to rotate, and through the transmission chain 122, drives the second gear 214 to rotate. The second gear 214 drives the propeller blade 213 to rotate. When the grinding disc 103 performs a cutting operation, the powder produced is thrown by the grinding disc 103 towards the propeller blade 213. The rotation of the propeller blade 213 causes the gear teeth 218 to drive the transmission belt 220 to roll. When the gear plate 218 engages with the propeller blade 213, the powder is conveyed to the top by the propeller blade 213. The rotation of the propeller blade 213 drives the fourth bevel gear 215 to rotate. The fourth bevel gear 215 drives the fifth bevel gear 216 to rotate through meshing, thereby driving the cleaning brush 217 to rotate. After the powder is conveyed to the top, it is swept into the discharge port 209 by the cleaning brush 217 and enters the collection box 207 through the rectangular groove 210 and the guide groove 208. When the collection box 207 is full of powder, it is slid out through the slide groove 212 and the powder is poured out. Then the collection box 207 is slid back into the slide groove 212 and the guide groove 208 is aligned with the rectangular groove 210.

[0053] At the same time, the rotation of motor 106 drives the third connecting shaft 304 to rotate, thereby causing the fan blade 305 to rotate and transferring the heat generated by motor 106 to the cover 301, which is then dissipated through heat dissipation holes 302.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An angle grinder, characterized in that: include, The cutting unit (100) includes a motor (106), which is a dual-axis motor. A first bevel gear (108) is fixedly connected to the shaft end of the motor (106), and a second bevel gear (110) is meshed with one side of the first bevel gear (108). A grinding disc (103) is fixedly connected to one end of the second bevel gear (110). Cleaning unit (200), the cleaning unit (200) includes a propeller blade (213), a transmission belt (220) is provided on one side of the propeller blade (213), and a plurality of teeth (218) are fixedly connected to the outer side of the transmission belt (220), the distance between two adjacent teeth (218) is adapted to the pitch between the propeller blade (213); And a heat dissipation unit (300), the heat dissipation unit (300) including fan blades (305), the two ends of the fan blades (305) being fixedly connected to a third connecting shaft (304), and one end of the third connecting shaft (304) being fixedly connected to the shaft end of the motor (106). The second bevel gear (110) is meshed with a third bevel gear (111) on one side, and a first connecting shaft (113) is fixedly connected to one end of the third bevel gear (111). A second bracket (112) is rotatably connected to both ends of the first connecting shaft (113). A fixed shaft (109) is rotatably connected to the end of the second bevel gear (110) away from the grinding disc (103). A first bracket (107) is rotatably connected to the shaft end of the motor (106) near the end of the first bevel gear (108). The other ends of the first bracket (107), the fixed shaft (109), and the second bracket (112) are all fixedly connected to the same support rod (105), and the outside of the support rod (105) is fixedly connected to the first housing (104). The two ends of the first housing (104) are fixedly connected to the first bracket (107) and the second bracket (112) respectively. One end of the first housing (104) is fixedly connected to the support cylinder (101), and the outside of the support cylinder (101) is movably sleeved with a shock-absorbing pad (102). A worm (114) is fixedly connected to the first connecting shaft (113), and a first bearing (115) is fixedly connected to both ends of the worm (114) on the first connecting shaft (113). A worm wheel (116) is meshed with one side of the worm (114), and a second bearing (117) is fixedly connected to both ends of the worm wheel (116). A fixing plate (118) is fixedly connected to the other end of the second bearing (117), and the other end of the fixing plate (118) is fixedly connected to the outer ring of the first bearing (115). A second connecting shaft (119) is slidably connected through both ends of the worm wheel (116). A protrusion (120) is fixedly connected to one side of the second connecting shaft (119), and the protrusion (120) passes through the worm gear (116) together with the second connecting shaft (119). A support seat (127) is fixedly connected to the end of the second connecting shaft (119). A first gear (121) is fixedly connected to the top of the support seat (127) at the end of the second connecting shaft (119), and a transmission chain (122) is meshed with the outside of the first gear (121). A second housing (201) is provided on the outer side of the grinding disc (103), and guide plates (225) are fixedly connected to both sides of the second housing (201) at the shaft end of the grinding disc (103). A third housing (202) is fixedly connected to the other side of the second housing (201), and a propeller blade (213) is located inside the third housing (202). A fourth housing (203) is fixedly connected to one side of the third housing (202), and a transmission belt (220) is located inside the fourth housing (203). A fifth housing (204) is fixedly connected to the top of the third housing (202) on one side, and a cleaning brush (217) is rotatably connected inside the fifth housing (204). The second housing (201), the third housing (202), the fourth housing (203) and the fifth housing (204) are interconnected, and a base (205) is fixedly connected to the bottom of the second housing (201), the third housing (202) and the fourth housing (203). The other end of the support base (127) is fixedly connected to one side of the base (205).

2. The angle grinder according to claim 1, characterized in that: The other end of the first housing (104) is fixedly connected to a second slide rod (124), and the two ends of the second slide rod (124) are slidably connected to a first slide rod (123). The end of the first slide rod (123) is fixedly connected to a protrusion (126). A spring (125) is movably sleeved on the first slide rod (123), and the two ends of the spring (125) are respectively fixedly connected to the bottom of the second slide rod (124) and the top of the protrusion (126).

3. The angle grinder according to claim 1, characterized in that: The fourth housing (203) has fixed posts (222) fixedly connected to both ends of its inner sides, and rollers (223) are rotatably connected to the fixed posts (222), and annular grooves (224) are provided on the rollers (223). The transmission belt (220) is tumbled on the rollers (223) through the annular grooves (224). The fixed posts (222) have first connecting plates (219) fixedly connected to both ends, and a second connecting plate (221) is fixedly connected to one side of the inner side of the first connecting plate (219).

4. The angle grinder according to claim 3, characterized in that: The width of the second connecting plate (221) is adapted to the width of the transmission belt (220), and the distance between the two second connecting plates (221) is adapted to the thickness of the transmission belt (220). The top of the propeller blade (213) is fixedly connected to the fourth bevel gear (215), and the fourth bevel gear (215) is meshed with the fifth bevel gear (216) on one side. One end of the fifth bevel gear (216) is fixedly connected to one end of the cleaning brush (217). The end of the propeller blade (213) is fixedly connected to the second gear (214), and one side of the second gear (214) is meshed with the other end of the transmission chain (122). The bottom of the second gear (214) is rotatably connected to the inside of the base (205).

5. The angle grinder according to claim 4, characterized in that: A fixing block (206) is fixedly connected to the top of one side of the second housing (201), and a sliding groove (212) is provided on one side of the fixing block (206). A slider (211) is slidably connected inside the sliding groove (212), and a collection box (207) is fixedly connected to one end of the slider (211), and a guide groove (208) is fixedly connected to one end of the collection box (207). A discharge port (209) is fixedly connected to one side of the fifth housing (204), and the discharge port (209) communicates with the fifth housing (204). A rectangular groove (210) is provided at the bottom of the discharge port (209), and the width of the rectangular groove (210) is adapted to the width of the guide groove (208).

6. The angle grinder according to claim 1, characterized in that: The support cylinder (101) is fixedly connected to a fixing frame (303), and the other end of the third connecting shaft (304) is rotatably connected to one end of the fixing frame (303). The end of the support cylinder (101) is fixedly connected to a cover (301), and multiple heat dissipation holes (302) are opened on the side of the cover (301).

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