Angle grinder and use method thereof

Abstract

The invention relates to the technical field of angle grinders, in particular to an angle grinder and a using method thereof.The angle grinder comprises a machine shell, a driving motor is arranged in the machine shell, and a driving bevel gear is fixed to the output end of the driving motor; the rotating machine head is rotatably connected with the machine shell, a first working shaft and a second working shaft are arranged on the rotating machine head, a first driven bevel gear is arranged on the first working shaft, a first positioning ring is fixedly arranged on the first driven bevel gear, a second driven bevel gear is arranged on the second working shaft, and a second positioning ring is fixedly arranged on the second driven bevel gear. A second positioning ring is fixedly arranged on the second driven bevel gear; the locking mechanism is used for locking the rotating machine head on the machine shell; the switching mechanism is used for switching the working states of the first working shaft and the second working shaft, and comprises a gear ring fixed on the shell; the first gear is meshed with the gear ring, and a first transmission rod is fixed on the first gear; and a second gear is fixed on the second transmission rod.

Description

Technical Field

[0001] This application relates to the field of angle grinder technology, and in particular to an angle grinder and its method of use. Background Technology

[0002] Angle grinders, as an indispensable handheld power tool, are widely used in grinding, cutting, and polishing operations in metal processing, construction, woodworking, and other fields. Traditional angle grinders are usually designed with a single working axis and grinding wheel. When it is necessary to change the type of work (such as switching from a cutting wheel to a polishing wheel) or replace worn parts, the operator must stop the machine, use special tools to remove the locking nut, replace the parts, and re-tighten them. This process is not only time-consuming and labor-intensive, reducing work efficiency, but also particularly cumbersome in scenarios with frequent changes, and there is also a safety risk of the tool starting unexpectedly or parts not being installed securely.

[0003] To improve convenience, some angle grinder designs equipped with multiple working heads (working axes) have appeared on the market, such as a multi-head angle grinder proposed in publication number CN217860591U. However, in this device, when the machine is started, its multiple working heads are all rotating at the same time. When the operator is using one of the working heads, the other rotating working heads are completely exposed and cannot be effectively isolated.

[0004] This application proposes an angle grinder and its method of use to address this issue. Application content

[0005] The purpose of this application is to address at least one of the aforementioned technical deficiencies.

[0006] Therefore, one objective of this application is to provide an angle grinder and a method of using it to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0007] To achieve the above objectives, one embodiment of this application provides an angle grinder, comprising: a housing containing a drive motor, wherein a driving bevel gear is fixedly mounted on the output end of the drive motor; a rotating head rotatably connected to the housing, the rotating head having a first working shaft and a second working shaft, the first working shaft having a first driven bevel gear with a first positioning ring fixedly mounted on the first driven bevel gear, the second working shaft having a second driven bevel gear with a second positioning ring fixedly mounted on the second driven bevel gear; a locking mechanism for locking the rotating head to the housing; and a switching mechanism for switching between the first working shaft and the second working shaft. The working state includes: a gear ring fixed to the housing; a first gear meshing with the gear ring, on which a first transmission rod is fixed; a second transmission rod on which a second gear is fixed, and the second transmission rod is connected to the first transmission rod via a universal joint; an adjusting block with connecting sleeves fixed at both ends, one of which is rotatably connected to a first positioning ring, and the other is rotatably connected to a second positioning ring; a first rack fixedly connected to the adjusting block, which meshes with the second gear; and a lubrication mechanism located inside the rotating head, driven by a switching mechanism to lubricate either the first driven bevel gear or the second driven bevel gear.

[0008] Preferably, in any of the above embodiments, the housing is provided with a guide groove and a sliding groove; the bottom of the rotating head is provided with a guide block, which slides with the guide groove to realize the switching limitation between 0° and 180° of the rotating head and the housing; a support plate is fixed inside the rotating head, and a guide groove is provided on the support plate; a locking groove is provided on the rotating head; a first spline block is fixed on the first working shaft, a second spline block is fixed on the second working shaft, a first spline groove that slides with the first spline block is provided on the first driven bevel gear, and a second spline groove that slides with the second spline block is provided on the second driven bevel gear.

[0009] Preferably, the locking mechanism comprises: a sliding plate slidably disposed in a groove, an operating block fixedly disposed on the sliding plate, and a locking block cooperating with the locking groove fixedly disposed on the top of the sliding plate; and a return spring disposed in the groove, the top of which is fixedly connected to the locking block, and the bottom of which is fixedly disposed in the groove.

[0010] Preferably, in any of the above embodiments, the first transmission rod is rotatably mounted on the positioning plate inside the rotating head; the second transmission rod is rotatably mounted on the first positioning sleeve inside the rotating head; and the adjusting block is slidably mounted in the guide groove.

[0011] Preferably, according to any of the above embodiments, the lubrication mechanism includes: an oil tank fixed inside the rotating head, with an oil injection pipe extending to the outside of the rotating head and a sealing plug thereon; two transmission chambers fixedly disposed at the bottom of the oil tank, the transmission chambers being connected to the oil tank via a connecting pipe; a drive gear fixed to a second transmission rod; a first outlet assembly cooperating with the drive gear; a second outlet assembly cooperating with the drive gear; an output pipe having two inlet ends and one outlet end, the two inlet ends being fixedly connected to the two transmission chambers respectively; and a third gear rotatably disposed on a vertical rod inside the rotating head, the third gear meshing with the second gear, the third gear having a through hole, and the outlet end of the output pipe being disposed within the through hole.

[0012] Preferably, in any of the above embodiments, the first output component includes: a first rotating rod rotatably mounted on a second positioning sleeve inside the rotating head; a first driven gear rotatably mounted on the first rotating rod and meshing with a first driving gear, the first driven gear having a first annular groove; a first inner ratchet rotatably mounted inside the first annular groove; a first pawl rotatably mounted on a first limiting rod at the top of the first driven gear; a first spring plate fixed to the top of the first driven gear and in contact with the first pawl; a first drive gear fixed to the first rotating rod; a first connecting ring fixed inside the rotating head; a first coil spring, the coiling end of which is fixedly connected to the first rotating rod, and the fixed end of which is fixed to the first connecting ring; and a first driven rack meshing with the first driven gear, the first driven rack having a first square rod fixedly mounted on it.

[0013] Preferably, in any of the above schemes, the first square rod is slidably connected to one of the transmission chambers, and a first piston is fixed at the end of the first square rod, the first piston being slidably disposed in one of the transmission chambers.

[0014] Preferably, in any of the above embodiments, the second output component includes: a second rotating rod rotatably mounted on a third positioning sleeve inside the rotating head; a second driven gear rotatably mounted on the second rotating rod and meshing with a first driving gear, the second driven gear having a second annular groove; a second inner ratchet rotatably mounted inside the second annular groove; a second pawl rotatably mounted on a second limiting rod at the top of the second driven gear; a second spring plate fixed to the top of the second driven gear and in contact with the second pawl; a second drive gear fixed to the second rotating rod; a second connecting ring fixed inside the rotating head; a second coil spring, the coiling end of which is fixedly connected to the second rotating rod, and the fixed end of which is fixed to the second connecting ring; and a second driven rack meshing with the second driven gear, the second driven rack having a second square rod fixedly mounted on it.

[0015] Preferably, in any of the above embodiments, the second square rod is slidably connected to one of the transmission chambers, and a second piston is fixed to the end of the second square rod, the second piston being slidably disposed inside one of the transmission chambers.

[0016] A method for using an angle grinder: S1: The locking mechanism releases the lock between the rotating head and the housing; S2: Rotate the rotating head around the machine casing, making it rotate 180°; S3: While the rotating head is rotating, the first working rod and the second working rod are switched via the switching mechanism; S4: While switching the working mechanism, it drives the lubrication mechanism. During a single rotation, it is controlled by the first inner ratchet and the second inner ratchet, driving only the first output component (or the second output component). When rotating in the opposite direction again, it drives the second output component (or the first output component) and adjusts the output tube in real time through the third gear.

[0017] Compared with the prior art, the advantages and beneficial effects of this application are as follows: 1. By using a switching mechanism, it is strictly ensured that in any working state, only one driven bevel gear on one working shaft meshes with the driving bevel gear and receives power to drive its working disc to rotate. The driven bevel gear on the other working shaft is completely disengaged and in a completely stationary free state. The installed working disc will not rotate, fundamentally eliminating the risk of accidental rotation of the unused working end causing injury or interfering with the operation.

[0018] 2. The lubrication mechanism is linked to the switching mechanism, automatically triggered each time the machine head rotates to switch working shafts. With each switch, the lubrication mechanism automatically sprays lubricating oil into the driven bevel gear (the one that has just engaged) that is about to be put into operation. The output pipe adjusts the oil spray direction in real time under the drive of the third gear.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of an embodiment according to this application; Figure 2 This is a schematic cross-sectional view of the rotating head according to an embodiment of this application; Figure 3 According to the embodiments of this application Figure 2 Enlarged view of point A in the middle; Figure 4 This is a partial schematic diagram according to an embodiment of this application; Figure 5 According to the embodiments of this application Figure 4 Enlarged view of point B in the middle; Figure 6 This is a schematic cross-sectional view of the housing according to an embodiment of this application; Figure 7 According to the embodiments of this application Figure 6 Enlarged view of point C in the middle; Figure 8 This is a schematic cross-sectional view of the first driven bevel gear according to an embodiment of this application; Figure 9 This is a schematic diagram of the third gear connection according to an embodiment of this application; Figure 10 This is a schematic diagram of the adjustment block connection according to an embodiment of this application; Figure 11 This is an exploded view of the first derived component according to an embodiment of this application.

[0021] In the diagram: 1. Housing; 11. Drive gear; 2. Rotating head; 21. First working shaft; 22. Second working shaft; 23. First driven bevel gear; 24. First positioning ring; 25. Second driven bevel gear; 26. Second positioning ring; 27. Support plate; 3. Locking mechanism; 31. Sliding plate; 32. Operating block; 33. Locking block; 4. Switching mechanism; 41. Gear ring; 42. First gear; 4201. First transmission rod; 43. Second transmission rod; 4301. Second gear; 44. Universal joint; 45. Adjusting block; 4501. Connecting sleeve; 46. First rack; 5. Lubrication mechanism; 51. Oil tank; 5101. Transmission chamber; 52. Drive gear; 53. First discharge assembly; 5 301. First rotating rod; 5302. First driven gear; 5303. First inner ratchet; 5304. First pawl; 5305. First drive gear; 5306. First connecting ring; 5307. First coil spring; 5308. First driven rack; 5309. First square rod; 5310. First piston; 54. Second outlet assembly; 5401. Second rotating rod; 5402. Second driven gear; 5403. Second inner ratchet; 5404. Second pawl; 5405. Second drive gear; 5406. Second connecting ring; 5407. Second coil spring; 5408. Second driven rack; 5409. Second square rod; 5410. Second piston; 55. Output pipe; 56. Third gear. Detailed Implementation

[0022] like Figures 1 to 11 As shown, an angle grinder includes a housing 1, a rotating head 2, a locking mechanism 3, a switching mechanism 4, and a lubrication mechanism 5.

[0023] Furthermore, a drive motor is provided inside the housing 1, and an active bevel gear 11 is fixed on the output end of the drive motor; The housing 1 is provided with guide grooves and sliding grooves.

[0024] Furthermore, the rotating head 2 is rotatably connected to the housing 1. The rotating head 2 is provided with a first working shaft 21 and a second working shaft 22. The first working shaft 21 is provided with a first driven bevel gear 23, and a first positioning ring 24 is fixedly provided on the first driven bevel gear 23. The second working shaft 22 is provided with a second driven bevel gear 25, and a second positioning ring 26 is fixedly provided on the second driven bevel gear 25. The bottom of the rotating head 2 is provided with a guide block, which is in sliding fit with the guide groove to realize the switching limitation of half-circle rotation of the rotating head 2 and the housing 1; A support plate 27 is fixed inside the rotating head 2, and a guide groove is provided on the support plate 27; The rotating head 2 is provided with a locking groove; A first spline block is fixed on the first working shaft 21, a second spline block is fixed on the second working shaft 22, a first spline groove is provided on the first driven bevel gear 23 to slide with the first spline block, and a second spline groove is provided on the second driven bevel gear 25 to slide with the second spline block. The spline block and spline groove are designed so that the first and second driven bevel gears can slide on the first and second working shafts and be driven synchronously by both. Different working units (such as angle grinder discs, cutting discs, or wire brushes) can be installed on the two working axes.

[0025] Furthermore, the locking mechanism 3 is used to lock the rotating head 2 onto the housing 1, including: A sliding plate 31 is slidably disposed in a sliding groove. An operating block 32 is fixedly provided on the sliding plate 31, and a locking block 33 that cooperates with the locking groove is fixedly provided on the top of the sliding plate 31. A reset spring is provided in the slide groove. Its top is fixedly connected to the locking block 33, and its bottom is fixed in the slide groove. The reset spring is used to provide a reset force for the locking block 33.

[0026] Furthermore, the switching mechanism 4 is used to switch the working states of the first working axis 21 and the second working axis 22, including: The gear ring 41 is fixed to the housing 1. The way the gear ring 41 is fixed to the housing 1 prevents the gear ring 41 from rotating. The first gear 42 meshes with the gear ring 41, and the first transmission rod 4201 is fixed on the first gear 42; The second transmission rod 43 has a second gear 4301 fixed on it, and the second transmission rod 43 is connected to the first transmission rod 4201 through a universal joint 44. The adjusting block 45 has connecting sleeves 4501 fixed at both ends. One of the connecting sleeves 4501 is rotatably connected to the first positioning ring 24, and the other connecting sleeve 4501 is rotatably connected to the second positioning ring 26. The first rack 46 is fixedly connected to the adjusting block 45, and the first rack 46 meshes with the second gear 4301; The first transmission rod 4201 is rotatably mounted on the positioning plate inside the rotating head 2; The second transmission rod 43 is rotatably mounted on the first positioning sleeve inside the rotating head 2; The adjusting block 45 is slidably disposed in the guide groove; By rotating the rotating head 2, the first gear 42 is driven to move on the gear ring 41, so that the first gear 42 rotates on its own axis while following the rotation of the rotating head 2.

[0027] Furthermore, the lubrication mechanism 5 is located inside the rotating head 2 and is driven by the switching mechanism 4 to lubricate the first driven bevel gear 23 or the second driven bevel gear 25, including: Oil tank 51 is fixed inside the rotating head 2 and has an oil injection pipe that extends to the outside of the rotating head 2. The oil injection pipe is equipped with a sealing plug. Two transmission chambers 5101 are fixedly provided at the bottom of the oil tank 51 and are connected to the oil tank 51 by a connecting pipe. The drive gear 52 is fixed on the second transmission rod 43; The first output component 53 cooperates with the drive gear 52; The second output component 54 cooperates with the drive gear 52; The output tube 55 has two inlet ends and one outlet end. The two inlet ends are fixedly connected to the two transmission chambers 5101 respectively. The outlet end of the output tube 55 is provided with a flexible tube end. The third gear 56 is rotatably mounted on the upright inside the rotating head 2. The third gear 56 meshes with the second gear 4301. The third gear 56 has a through hole, and the outlet end of the output pipe 55 is located in the through hole.

[0028] Specifically, the first export component 53 includes: The first rotating rod 5301 is rotatably mounted on the second positioning sleeve inside the rotating head 2; The first driven gear 5302 is rotatably mounted on the first rotating rod 5301 and meshes with the first driving gear 52. The first driven gear 5302 is provided with a first annular groove. The first inner ratchet 5303 is rotatably disposed within the first annular groove; The first pawl 5304 is rotatably mounted on the first limiting rod at the top of the first driven gear 5302; The first spring plate is fixed to the top of the first driven gear 5302 and remains in contact with the first pawl 5304; The first drive gear 5305 is fixed on the first rotating rod 5301; The first connecting ring 5306 is fixed inside the rotating head 2; The first coil spring 5307 has its winding end fixedly connected to the first rotating rod 5301, and its fixed end is fixed to the first connecting ring 5306. The first driven rack 5308 meshes with the first driven gear 5302, and a first square rod 5309 is fixed on the first driven rack 5308; The first square rod 5309 is slidably connected to one of the transmission chambers 5101. The end of the first square rod 5309 is fixed with a first piston 5310, which is slidably disposed in one of the transmission chambers 5101. The second export component 54 includes: The second rotating rod 5401 is rotatably mounted on the third positioning sleeve inside the rotating head 2; The second driven gear 5402 is rotatably mounted on the second rotating rod 5401 and meshes with the first driving gear 52. The second driven gear 5402 is provided with a second annular groove. The second inner ratchet 5403 is rotatably disposed in the second annular groove. The second inner ratchet 5403 is installed in the opposite direction to the first inner ratchet 5303, corresponding to the drive of the rotating head 2 to switch back and forth. The second pawl 5404 is rotatably mounted on the second limiting rod at the top of the second driven gear 5402, and the second pawl 5404 corresponds to the mounting direction of the second inner ratchet 5403; The second spring plate is fixed to the top of the second driven gear 5402 and keeps in contact with the second pawl 5404. Both the first and second spring plates include a fixed end and an elastic end. The fixed end is fixed to the first and second driven gears respectively, and the elastic end keeps in contact with the first and second pawls respectively. The second drive gear 5405 is fixed on the second rotating rod 5401; The second connecting ring 5406 is fixed inside the rotating head 2; The second coil spring 5407 has its winding end fixedly connected to the second rotating rod 5401, and its fixed end is fixed to the second connecting ring 5406. The second driven rack 5408 meshes with the second driven gear 5402, and a second square rod 5409 is fixed on the second driven rack 5408; The second square rod 5409 is slidably connected to one of the transmission chambers 5101. The end of the second square rod 5409 is fixed with a second piston 5410, which is slidably disposed in one of the transmission chambers 5101.

[0029] A method for using an angle grinder: S1: The locking mechanism 3 releases the lock between the rotating head 2 and the housing 1. Pulling the operating block 32 drives the sliding plate 31 and the locking block 33 to move, so that the locking block 33 disengages from the locking groove to unlock. At this time, the rotating head 2 can rotate. S2: Rotate the rotating head 2 around the housing 1 to make it rotate 180°; S3: While the rotating head 2 is rotating, the switching mechanism 4 switches the first working rod and the second working rod. The rotating head 2 drives the first gear 42 synchronously. The first gear 42 rotates under the limitation of the gear ring 41, thereby driving the first transmission rod 4201. Through the universal joint 44 and the transmission drive, the second transmission rod 43 is driven. The second transmission rod 43 drives the second gear 4301. The second gear 4301 drives the first rack 46, thereby driving the adjusting block 45 to move. This drives the connecting sleeve 4501 to move, thereby driving the first driven bevel gear 23 and the second driven bevel gear 25 to be adjusted on the first working shaft 21 and the second working shaft 22, so that one of them disengages from the driving bevel gear 11 and the other engages with the driving bevel gear 11. S4: While switching mechanism 4 is working, lubrication mechanism 5 is driven to work. During a single rotation, it is controlled by the first inner ratchet 5303 and the second inner ratchet 5403, and only the first output component 53 (or the second output component 54) is driven to work. When rotating in the opposite direction again, the second output component 54 (or the first output component 53) is driven, and the output tube 55 is adjusted in real time through the third gear 56. The above S4 takes the operation of the first export component 53 as an example (the second export component 54 only operates when the rotating head 2 is driven in reverse): While the second gear 4301 rotates, it drives the second transmission rod 43 to rotate. The rotation of the second transmission rod 43 drives the fixed drive gear 52 to rotate. The drive gear 52 synchronously drives the first driven gear 5302 and the second driven gear 5402 to rotate. However, under the control of the installation direction of the first inner ratchet 5303 and the second inner ratchet 5403, this rotation direction only drives the first drive gear 5305 to rotate. The first drive gear 5305 drives the first driven rack 5308 to move, which in turn drives the first square rod 5309 and the first piston 5310 to move, creating a vacuum in the transmission chamber 5101. The lubricating oil in the oil tank 51 is then drawn into the transmission chamber 5101 through the connecting pipe. The first drive gear 5305 also drives the first rotating rod 5301 to rotate. The rotation of rod 5301 drives the first coil spring 5307 to wind up. Simultaneously, the second gear 4301 also drives the third gear 56 to rotate. The third gear 56 drives the output pipe 55 to adjust, so that the output pipe 55 rotates from the direction toward the first driven bevel gear 23 to the direction toward the second driven bevel gear 25. When the rotating rod stops rotating, the coil spring stops winding and performs a release movement, driving the first rotating rod 5301 to reverse. At this time, under the control of the first inner ratchet 5303 and the first pawl 5304, the first driven gear 5302 is not driven. The reverse rotation of the first rotating rod 5301 drives the first driving gear 52, which in turn drives the first driven rack 5308 to move, driving the first piston 5310 to move in the transmission chamber 5101, and exporting the lubricating oil in the transmission chamber 5101 from the output pipe 55.

Claims

1. An angle grinder, characterized in that: include: The housing contains a drive motor, and a drive bevel gear is fixed to the output end of the drive motor. A rotating head is rotatably connected to the housing. The rotating head is provided with a first working shaft and a second working shaft. The first working shaft is provided with a first driven bevel gear and a first positioning ring is fixedly provided on the first driven bevel gear. The second working shaft is provided with a second driven bevel gear and a second positioning ring is fixedly provided on the second driven bevel gear. A locking mechanism is used to lock the rotating head onto the housing; A switching mechanism, used to switch the working states of the first working axis and the second working axis, includes: Gear ring, fixed to the housing; The first gear meshes with the gear ring, and a first transmission rod is fixed on the first gear; The second transmission rod has a second gear fixed on it, and the second transmission rod is connected to the first transmission rod through a universal joint. An adjusting block has connecting sleeves fixed at both ends, one of which is rotatably connected to a first positioning ring, and the other connecting sleeve is rotatably connected to a second positioning ring. The first rack is fixedly connected to the adjusting block, and the first rack meshes with the second gear; The lubrication mechanism, located inside the rotating head, is driven by the switching mechanism to lubricate the first driven bevel gear or the second driven bevel gear.

2. The angle grinder according to claim 1, characterized in that: The housing is provided with guide grooves and sliding grooves; The bottom of the rotating head is provided with a guide block, which is slidably engaged with the guide groove to realize the switching limitation of the rotating head and the housing between 0° and 180°. A support plate is fixed inside the rotating head, and a guide groove is provided on the support plate; The rotating head is provided with a locking groove; A first spline block is fixed on the first working shaft, and a second spline block is fixed on the second working shaft. A first spline groove that slides with the first spline block is provided on the first driven bevel gear, and a second spline groove that slides with the second spline block is provided on the second driven bevel gear.

3. An angle grinder according to claim 2, characterized in that: The locking mechanism includes: A sliding plate is slidably disposed in a sliding groove. An operating block is fixedly provided on the sliding plate, and a locking block that cooperates with a locking groove is fixedly provided on the top of the sliding plate. The return spring is located in the slide groove, with its top fixedly connected to the locking block and its bottom fixed in the slide groove.

4. An angle grinder according to claim 2, characterized in that: The first transmission rod is rotatably mounted on the positioning plate inside the rotating head; The second transmission rod is rotatably mounted on the first positioning sleeve inside the rotating head; The adjusting block is slidably disposed within the guide groove.

5. An angle grinder according to claim 1, characterized in that: The lubrication mechanism includes: An oil tank is fixed inside the rotating head and has an oil injection pipe that extends to the outside of the rotating head. The oil injection pipe is equipped with a sealing plug. Two transmission chambers are fixedly installed at the bottom of the oil tank and are connected to the oil tank by a connecting pipe. The drive gear is fixed on the second transmission rod; The first export component works in conjunction with the drive gear; The second export component works in conjunction with the drive gear; The output tube has two inlet terminals and one outlet terminal, with the two inlet terminals fixedly connected to the two transmission chambers respectively. The third gear is rotatably mounted on a vertical rod inside the rotating head. The third gear meshes with the second gear. A through hole is provided on the third gear, and the outlet end of the output tube is located inside the through hole.

6. An angle grinder according to claim 5, characterized in that: The first export component includes: The first rotating rod is rotatably mounted on the second positioning sleeve inside the rotating head; The first driven gear is rotatably mounted on the first rotating rod and meshes with the first driving gear. The first driven gear has a first annular groove. The first inner ratchet is rotatably disposed within the first annular groove; The first pawl is rotatably mounted on the first limiting rod at the top of the first driven gear; The first spring plate is fixed to the top of the first driven gear and remains in contact with the first pawl; The first drive gear is fixed on the first rotating rod; The first connecting ring is fixed inside the rotating head; The first coil spring has its winding end fixedly connected to the first rotating rod, and its fixed end fixed to the first connecting ring; A first driven rack meshes with a first driven gear, and a first square rod is fixed on the first driven rack.

7. An angle grinder according to claim 6, characterized in that: The first square rod is slidably connected to one of the transmission chambers, and a first piston is fixed to the end of the first square rod. The first piston is slidably disposed in one of the transmission chambers.

8. An angle grinder according to claim 5, characterized in that: The second export component includes: The second rotating rod is rotatably mounted on the third positioning sleeve inside the rotating head; The second driven gear is rotatably mounted on the second rotating rod and meshes with the first driving gear. The second driven gear has a second annular groove. The second inner ratchet is rotatably located within the second annular groove; The second pawl is rotatably mounted on the second limiting rod at the top of the second driven gear; The second spring plate is fixed to the top of the second driven gear and remains in contact with the second pawl; The second drive gear is fixed on the second rotating rod; The second connecting ring is fixed inside the rotating head; The second coil spring has its winding end fixedly connected to the second rotating rod, and its fixed end fixed to the second connecting ring. The second driven rack meshes with the second driven gear, and a second square rod is fixed on the second driven rack.

9. An angle grinder according to claim 8, characterized in that: The second square rod is slidably connected to one of the transmission chambers, and a second piston is fixed to the end of the second square rod. The second piston is slidably disposed inside one of the transmission chambers.

10. A method of using an angle grinder according to any one of claims 1-9, characterized in that: S1: The locking mechanism releases the lock between the rotating head and the housing; S2: Rotate the rotating head around the machine casing, making it rotate 180°; S3: While the rotating head is rotating, the first working rod and the second working rod are switched via the switching mechanism; S4: While switching the working mechanism, it drives the lubrication mechanism. During a single rotation, it is controlled by the first inner ratchet and the second inner ratchet, driving only the first output component (or the second output component). When rotating in the opposite direction again, it drives the second output component (or the first output component) and adjusts the output tube in real time through the third gear.

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