Variable frequency speed-regulating rotary arm milling machine

Abstract

The present application relates to the technical field of part processing, and discloses a variable-frequency speed-regulating rotary arm milling machine, which comprises a stand, a worm gear, a rotary arm assembly, a milling cutter movement assembly, a variable-frequency control box and a current collector ring, the lower end of the stand is provided with a flange structure, and the stand is provided with a power switch; the worm gear is fixedly sleeved on the stand; the rotary arm assembly comprises a shell and a worm, the shell is rotatably sleeved on the stand, the worm is rotatably connected to the shell at both ends, and the worm is in meshing transmission with the worm gear; the milling cutter movement assembly and the variable-frequency control box are installed on the shell; the fixed part of the current collector ring is fixedly sleeved on the stand, the rotatable part of the current collector ring is connected to the shell, the current collector ring is electrically connected with the power switch and the variable-frequency control box, and the variable-frequency control box is electrically connected with the milling cutter movement assembly. The variable-frequency speed-regulating rotary arm milling machine can process a workpiece to be processed which is fixed at a certain position and cannot be moved, and the stand can be installed on one side of the workpiece to be processed or the center of a ring-shaped workpiece to be processed through the flange structure at the lower end.

Description

Technical Field

[0001] This invention relates to the field of parts processing technology, and in particular to a variable frequency speed control rotary arm milling machine. Background Technology

[0002] A milling machine is a machine tool that uses a milling cutter to machine various surfaces of a workpiece. When a milling machine is in operation, the part to be machined is usually placed on the machine's operating table and fixed, and then the milling cutter is controlled to machine it.

[0003] However, existing milling machines cannot process parts that are fixed in one place and cannot be disassembled or moved, especially ring-shaped workpieces that cannot be moved and can not be processed on-site. Summary of the Invention

[0004] The purpose of this invention is to provide a milling machine that facilitates the processing of immovable workpieces.

[0005] To achieve the above objectives, the present invention provides a variable frequency speed-regulating rotary arm milling machine, comprising: The column has a flange structure at its lower end and is equipped with a power switch; A worm gear, which is fixedly sleeved onto the column; A rotary arm assembly, comprising a housing and a worm gear, wherein the housing is rotatably sleeved on the column, and both ends of the worm gear are rotatably connected to the housing, and the worm gear meshes with the worm wheel for transmission; A milling cutter motion assembly, which is mounted on the housing; A frequency converter control box is installed on the housing and is electrically connected to the milling cutter motion assembly; a slip ring has a fixed part fixedly sleeved on the column and a rotatable part connected to the housing, and is electrically connected to the power switch and the frequency converter control box.

[0006] In some embodiments, the rotary arm assembly further includes an electric rotating assembly, a manual rotating assembly, a switching element, and a switching switch. The manual rotating assembly is used to manually rotate the worm gear. The electric rotating assembly is mounted on the housing and rotatably connected to the worm gear. The electric rotating assembly is electrically connected to the frequency converter control box. The switching element is sleeved on the worm gear and keyed to the worm gear. The switching switch is connected to the housing and can push the switching element to slide along the worm gear axis between a first position and a second position. When the switching element is in the first position, the switching element is engaged with the electric rotating assembly. When the switching element is in the second position, the switching element is disengaged from the electric rotating assembly.

[0007] In some embodiments, the electric rotating assembly includes a gear reducer and a transition connector. The gear reducer is mounted on the housing and electrically connected to the frequency converter control box. The transition connector is rotatably connected to the housing. One end of the transition connector is fixedly connected to the power output shaft of the gear reducer, and the other end of the transition connector is rotatably connected to the worm gear and has a slot on its end face. The switching switch can push the switching component into or out of the slot.

[0008] In some embodiments, the switch includes a toggle handle, a connecting part, a lever, and an arc-shaped component. The connecting part is rotatably connected to the housing. One end of the connecting part is fixedly connected to the toggle handle, and the other end of the connecting part is fixedly connected to the lever. The lever is rotatably connected to the arc-shaped component. A limiting groove is formed on the side of the switch along the circumferential direction, and the arc-shaped component is slidably disposed in the limiting groove.

[0009] In some embodiments, the manual rotating assembly includes a first bevel gear, a rotating wheel, and a second bevel gear sleeved on the worm gear. The rotating wheel is rotatably connected to the housing and fixedly connected to the first bevel gear. The second bevel gear is fixedly connected to the worm gear and meshes with the first bevel gear.

[0010] In some embodiments, the milling cutter motion assembly includes a first guide rail, a first slider, a first screw, a first handwheel, a second guide rail, a second slider, a second screw, a second handwheel, a milling cutter assembly, and a drive assembly. The first guide rail is fixedly connected to the outer wall of the housing in a horizontal direction. The first slider is slidably connected to the first guide rail. The first screw is rotatably connected to the housing and passes through the first slider and is threadedly connected to the first slider. The first handwheel is fixedly connected to one end of the first screw. The second guide rail is fixedly connected to the side of the first slider away from the housing in a vertical direction. The second slider is slidably connected to the second guide rail. The second screw is rotatably connected to the first slider and passes through the second slider and is threadedly connected to the second slider. The second handwheel is fixedly connected to one end of the second screw. The drive assembly is mounted on the second slider and is electrically connected to the frequency converter control box. The drive assembly is used to drive the milling cutter assembly to rotate.

[0011] In some embodiments, the drive assembly includes a second motor, a first transmission wheel, a second transmission wheel, and a transmission belt. The second motor is electrically connected to the frequency converter control box. The milling cutter assembly includes a cutter head and a cutter shank. The cutter shank is rotatably connected to the second slider. The second motor is fixedly connected to the second slider. The first transmission wheel is fixedly connected to the output end of the second motor. The second transmission wheel is fixedly sleeved on the cutter shank. The transmission belt is sleeved on the first transmission wheel and the second transmission wheel. The cutter head is fixedly connected to the lower end of the cutter shank.

[0012] In some embodiments, the housing has heat dissipation holes.

[0013] In some embodiments, the variable frequency speed control rotary arm milling machine further includes a base flange, which is bolted to the flange structure.

[0014] In some embodiments, the variable frequency speed control rotary milling machine further includes a lighting lamp mounted on the housing.

[0015] The present invention discloses a variable frequency speed control rotary arm milling machine, which has the following advantages compared with the prior art: The column of this variable frequency speed-regulating rotary milling machine can be mounted to one side of the workpiece or the center of the annular workpiece via the flange structure at the lower end. This machine features a worm gear fixedly sleeved on the column, and the outer shell of the rotary arm assembly rotatably sleeved on the column. The worm's two ends are rotatably connected to the outer shell, meshing with the worm gear. Thus, when the worm rotates around its own axial direction, it simultaneously rotates around the circumference of the worm gear, thereby causing the outer shell to rotate around the column. The milling cutter motion assembly is mounted on the outer shell, and therefore can also rotate around the column with the outer shell. This allows the variable frequency speed-regulating rotary milling machine to process annular workpieces that are fixed in one place and cannot be moved. The machine is equipped with a frequency converter control box to adjust the speed of the rotating components. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one direction of an embodiment of the present invention; Figure 2 This is a schematic diagram of another direction of an embodiment of the present invention; Figure 3 This is a schematic diagram of the components inside the first housing according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the cooperation between the switching switch and the switching element in an embodiment of the present invention; Figure 5 This is a schematic diagram of the variable frequency speed control rotary arm milling machine according to another direction of this invention; In the diagram, 1. Column; 11. Flange structure; 12. Power switch; 2. Worm gear; 3. Rotary arm assembly; 31. Housing; 311. First housing; 312. Second housing; 3121. First mounting base; 3122. Heat dissipation hole; 32. Worm gear; 33. Electric rotating assembly; 331. Gear reducer; 3311. First motor; 3312. Gear reducer box; 33121. Mounting flange; 332. Transition connector; 3321. Slot; 34. Manual rotating assembly; 341. First bevel gear; 342. Rotating wheel; 343. Second bevel gear; 35. Switching component; 351. Limiting groove; 36. Switch; 361. Toggle handle; 362. 363. Connecting part; 364. Paddle; 365. Arc-shaped part; 37. First roller; 38. Second roller; 39. Third roller; 4. Milling cutter motion assembly; 41. First guide rail; 42. First slider; 421. Second mounting base; 43. First screw; 44. First handwheel; 45. Second guide rail; 46. Second slider; 47. Second screw; 48. Second handwheel; 491. Milling cutter assembly; 4911. Cutter head; 4912. Cutter shank; 4913. Cutter sleeve; 492. Drive assembly; 4921. Second motor; 4922. First transmission wheel; 4923. Second transmission wheel; 4924. Transmission belt; 5. Slip ring; 6. Variable frequency control box; 7. Base flange. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] In the description of this invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0019] like Figures 1 to 4As shown, a preferred embodiment of the present invention, a variable frequency speed-regulating rotary arm milling machine, includes a column 1, a worm gear 2, a rotary arm assembly 3, a milling cutter motion assembly 4, a slip ring 5, and a variable frequency control box 6. The lower end of the column 1 has a flange structure 11. The column 1 is equipped with a power switch 12, which is preferably located at the top of the column 1. The column 1 is connected to an external power source via a plug. By controlling the power switch 12, the circuit between the variable frequency speed-regulating rotary arm milling machine and the external power source can be controlled. The worm gear 2 is fixedly sleeved on the column 1, and the worm gear 2 is preferably fixed to the column 1 using a flat key and a lock nut. The rotary arm assembly 3 includes a housing 31 and a worm 32. The outer casing 31 is rotatably fitted onto the column 1. The two ends of the worm gear 32 are rotatably connected to the outer casing 31, and the worm gear 32 meshes with the worm wheel 2 for transmission. The milling cutter motion assembly 4 is installed on the outer casing 31. The frequency converter control box 6 is installed on the outer casing 31 and is electrically connected to the milling cutter motion assembly 4. The slip ring 5 is an existing mature product. The fixed part of the slip ring 5 is fixedly fitted onto the column 1, and the rotatable part of the slip ring 5 is connected to the outer casing 31. The slip ring 5 is electrically connected to the power switch 12 and the frequency converter control box 6 to conduct power from the fixed part to the rotatable part, so as to realize the unlimited rotation of the rotating arm assembly 3 and the absence of wire entanglement between it and the column 1.

[0020] Based on the above embodiments, the variable frequency speed control rotary arm milling machine has a column 1 that can be installed on one side of the workpiece or the center of the annular workpiece through the flange structure 11 at the lower end. This variable frequency speed control rotary arm milling machine has a worm gear 2 fixedly sleeved on the column 1, and the outer shell 31 of the rotary arm assembly 3 is rotatably sleeved on the column 1. The two ends of the worm 32 are rotatably connected to the outer shell 31, and the worm 32 meshes with the worm gear 2. Therefore, when the worm 32 rotates around its own axial direction, it also rotates around the circumference of the worm gear 2, thereby driving the outer shell 31 to rotate around the column 1. The milling cutter motion assembly 4 is installed on the outer shell 31, so the milling cutter motion assembly 4 can also rotate around the column 1 with the outer shell 31. Thus, this variable frequency speed control rotary arm milling machine can process annular workpieces that are fixed in one place and cannot be moved. This variable frequency speed control rotary arm milling machine also has a variable frequency control box 6 that can adjust the speed of the rotating parts of the milling machine.

[0021] In some preferred embodiments, the swivel arm assembly 3 further includes an electric rotating assembly 33, a manual rotating assembly 34, a switching element 35, and a switching switch 36. The manual rotating assembly 34 is used to manually rotate the worm gear 32. A first roller 37 is provided between one end of the worm gear 32 and the housing 31 to reduce the frictional resistance between the worm gear 32 and the housing 31 during rotation. The electric rotating assembly 33 is installed on the housing 31 and rotatably connected to the other end of the worm gear 32. Specifically, a second roller 38 is provided between the electric rotating assembly 33 and the worm gear 32, so that the worm gear 32 can not only rotate relative to the electric rotating assembly 33 but also has low frictional resistance during rotation. The electric rotating assembly 33 is electrically connected to the frequency converter control box 6. The switching element 35 is sleeved on the worm gear 32. 2. It is keyed to the worm gear 32. The switch 36 is connected to the housing 31 and can push the switching element 35 to slide along the axial direction of the worm gear 32 between the first and second positions. The switch 36 is preferably rotatably connected to the housing 31. When the switching element 35 is in the first position, it is engaged with the electric rotating component 33. At this time, the electric rotating component 33 can drive the switching element 35 to rotate, thereby driving the worm gear 32 to rotate. When the switching element 35 is in the second position, it is disengaged from the electric rotating component 33. At this time, even if the electric rotating component 33 rotates, it cannot drive the switching element 35 to rotate, and therefore cannot drive the worm gear 32 to rotate. That is, rotating the worm gear 32 requires the use of the manual rotating component 34. By setting the switching element 35, the switch 36 can be used to switch between the first and second positions, thereby realizing the switching between the electric rotation mode and the manual rotation mode of the worm gear 32, which is convenient for the operator to select different modes for operation according to the actual situation.

[0022] Preferably, the electric rotating assembly 33 includes a gear reducer 331 and a transition connector 332. The gear reducer 331 is mounted on the housing 31 and is electrically connected to the frequency converter control box 6. Specifically, the housing 31 includes a first housing 311 and a second housing 312 axially connected to the first housing 311 along the column 1. The worm gear 2, worm 32, and switching component 35 are all located inside the first housing 311. The gear reducer 331 includes a first motor 3311 and a gear reducer 3312. The first motor 3311 is mounted on one side of the gear reducer 3312 and is electrically connected to the frequency converter control box 6, so that the frequency converter control box 6 can control the output power of the first motor 3311. The outer wall of the gear reducer 3312 is provided with a mounting flange 33121, which is bolted to the first housing 311. Inside the gear reducer 3312... The component is equipped with a gear transmission mechanism to transmit the power output from the first motor 3311 to the transition connector 332. The transition connector 332 is rotatably connected to the first housing 311. Preferably, a third roller 39 is provided between the transition connector 332 and the first housing 311. The third roller 39 can reduce the frictional resistance of the relative rotation between the transition connector 332 and the first housing 311. One end of the transition connector 332 is fixedly connected to the power output shaft of the gear reducer 331, and the other end of the transition connector 332 is rotatably connected to the worm gear 32 and has a slot 3321 on its end face. The switching switch 36 can push the switching component 35 to engage or disengage from the slot 3321. Preferably, the outer periphery of the switching component has a toothed structure, and the shape of the slot matches the toothed structure on the outer periphery of the switching component to achieve a better engagement. The second roller 38 is located between the worm gear 32 and the transition connector 332. The speed of the first motor 3311 can be adjusted by setting the gear reducer 331. The transition connector 332 is rotatably connected to the first housing 311 and the worm 32, which can not only support the end of the worm 32, but also cooperate with the switching component 35 to realize the electric rotation of the worm 32.

[0023] like Figure 5 As shown, preferably, the switch 36 includes a toggle handle 361, a connecting part 362, a lever 363, and an arc-shaped member 364. The connecting part 362 is rotatably connected to the housing 31. One end of the connecting part 362 is fixedly connected to the toggle handle 361, and the other end of the connecting part 362 is fixedly connected to the lever 363. The lever 363 is rotatably connected to the arc-shaped member 364. A limiting groove 351 is formed on the side of the switching member 35 along the circumferential direction. The arc-shaped member 364 is slidably disposed in the limiting groove 351. When the operator rotates the toggle handle 361, the lever 363 can move along an arc. The arc-shaped member 364 rotates relative to the lever 363 and pushes the switching member 35 to slide axially along the worm gear 32 while rotating circumferentially along the limiting groove 351 under the limitation of the limiting groove 351.

[0024] Preferably, the manual rotation assembly 34 includes a first bevel gear 341, a rotating wheel 342, and a second bevel gear 343 sleeved on the worm gear 32. The rotating wheel 342 is rotatably connected to the housing 31 and fixedly connected to the first bevel gear 341. The second bevel gear 343 is fixedly connected to the worm gear 32 and meshes with the first bevel gear 341. When the worm gear 32 is rotated in manual mode, the switching component 35 moves out of the slot 3321 of the transition connector 332. The operator rotates the rotating wheel 342, causing the first bevel gear 341 to rotate, which in turn drives the second bevel gear 343 and the worm gear 32 to rotate.

[0025] In some embodiments, the milling cutter motion assembly 4 includes a first guide rail 41, a first slider 42, a first screw 43, a first handwheel 44, a second guide rail 45, a second slider 46, a second screw 47, a second handwheel 48, a milling cutter assembly 491, and a drive assembly 492. The first guide rail 41 is fixedly connected to the outer wall of the housing 31 in a horizontal direction. Specifically, the first guide rail 41 is fixedly connected to the outer wall of the second housing 312. The first slider 42 is slidably connected to the first guide rail 41, and a first V-shape is defined between the first guide rail 41 and the outer wall of the second housing 312. The first slider 42 is inserted into the first V-shaped groove to ensure its secure installation. The first screw 43 is rotatably connected to the outer shell 31, specifically to the second shell 312. The first screw 43 passes through the first slider 42 and is threadedly connected to it. The first handwheel 44 is fixedly connected to one end of the first screw 43. Preferably, the second shell 312 is provided with a first mounting base 3121, and the first screw 43 is rotatably connected to the first mounting base 3121. The first handwheel 44 and the first slider 42 are respectively located at the first... The mounting base 3121 has two sides to ensure that the first screw 43 remains stable when the first handwheel 44 is rotated; the second guide rail 45 is fixedly connected vertically to the side of the second housing 312 away from the outer housing 31 of the first slider 42; the second slider 46 is slidably connected to the second guide rail 45, and a second V-shaped groove is formed between the second guide rail 45 and the first slider 42; the second slider 46 is inserted into the second V-shaped groove to ensure that the installation of the second slider 46 is stable; the second screw 47 is rotatably connected to the first slider 42 and passes through the second slider 42. The first slider 42 is threadedly connected to the second slider 46, and the second handwheel 48 is fixedly connected to one end of the second screw 47. Preferably, the first slider 42 is provided with a second mounting base 421, and the second screw 47 is rotatably connected to the second mounting base 421. The second handwheel 48 and the second slider 46 are respectively located on both sides of the second mounting base 421 so that the second screw 47 remains stable when the second handwheel 48 is rotated. The drive assembly 492 is installed on the second slider 46 and is electrically connected to the frequency converter control box 6. The drive assembly 492 is used to drive the milling cutter assembly 491 to rotate. By setting the first guide rail 41, the first slider 42, the first screw 43, the first handwheel 44, the second guide rail 45, the second slider 46, the second screw 47, and the second handwheel 48, the first handwheel 44 can be rotated to move the milling cutter assembly 491 horizontally to adjust its position, and the second handwheel 48 can be rotated to move the milling cutter assembly 491 vertically to adjust its position. The drive assembly 492 drives the milling cutter assembly 491 to process the workpiece.

[0026] Furthermore, the drive assembly 492 includes a second motor 4921, a first transmission wheel 4922, a second transmission wheel 4923, and a transmission belt 4924. The second motor 4921 is electrically connected to the frequency converter control box 6, thereby the frequency converter control box 6 can control the output power of the second motor 4921. The milling cutter assembly 491 includes a cutter head 4911 and a cutter shank 4912. The cutter shank 4912 is rotatably connected to the second slider 46. Preferably, the second slider 46 is equipped with a cutter sleeve 4913, and the cutter shank 4912 is rotatably connected to the cutter sleeve 4913. The second motor 4921 is fixedly connected to the first transmission wheel 4921. The two sliders 46 have a first transmission wheel 4922 fixedly connected to the output end of the second motor 4921, a second transmission wheel 4923 fixedly sleeved on the tool holder 4912, a transmission belt 4924 sleeved on the first transmission wheel 4922 and the second transmission wheel 4923, and a tool head 4911 fixedly connected to the lower end of the tool holder 4912. Thus, the second motor 4921 can drive the first transmission wheel 4922 to rotate, and the transmission belt 4924 transmits power to the second transmission wheel 4923. The second transmission wheel 4923 drives the tool holder 4912 and the tool head 4911 to rotate to process the workpiece.

[0027] Preferably, the outer casing 31 has heat dissipation holes 3122, specifically the second casing 312 has heat dissipation holes 3122, so as to facilitate heat dissipation.

[0028] Preferably, the variable frequency speed control rotary arm milling machine also includes a base flange 7, which is bolted to the flange structure 11. When the mounting surface is flat, the column 1 can be directly installed. When the mounting surface is uneven, the base flange 7 can be leveled on the mounting surface first using bolt assemblies, and then the flange structure 11 of the column 1 can be bolted to the base flange 7. When the mounting surface is uneven, the base flange 7 provides a mounting reference plane for the column 1, avoiding damage and deformation to the lower flange structure 11 of the column 1.

[0029] Preferably, the variable frequency speed control rotary arm milling machine also includes a lighting lamp (not shown in the figure). The lighting lamp is installed in the housing 31. By setting the lighting lamp, the operator can adjust the position of the milling cutter of the variable frequency speed control rotary arm milling machine in a dim environment, and it is also convenient to observe the milling cutter's processing of the workpiece.

[0030] The working process of this invention is as follows: First, the variable frequency speed control rotary arm milling machine is installed on one side or in the center of the workpiece to be processed. The variable frequency speed control rotary arm milling machine is connected to an external power source through a plug. When the power switch is turned on, the current enters the frequency control box through the slip ring. The rotation of the rotary arm assembly can be carried out in two modes: electric and manual. In electric mode, the switch is pushed to insert the switching piece into the slot of the transition connector, and the electric rotating assembly drives the rotary arm assembly to rotate. In manual mode, the switch is pushed to remove the switching piece from the slot of the transition connector, and the rotating wheel is operated to rotate the worm gear, thereby manually rotating the rotary arm assembly. The second motor drives the milling cutter assembly to rotate and cut the workpiece. The frequency control box can control the speed and direction of rotation of the first and second motors.

[0031] In summary, this invention provides a variable frequency speed-regulating rotary arm milling machine. Its column can be mounted to one side of the workpiece or the center of a ring-shaped workpiece via a flange structure at its lower end. This variable frequency speed-regulating rotary arm milling machine uses a worm gear fixedly sleeved on the column, and the outer shell of the rotary arm assembly is rotatably sleeved on the column. The two ends of the worm are rotatably connected to the outer shell, and the worm meshes with the worm gear. Thus, when the worm rotates around its own axial direction, it also rotates around the circumference of the worm gear, thereby driving the outer shell to rotate around the column. The milling cutter motion assembly is mounted on the outer shell, so it can also rotate around the column with the outer shell. Furthermore, because the column has a slip ring electrically connected to the rotary arm assembly, the rotary arm assembly can rotate 360° around the column in both directions without restriction. Therefore, this variable frequency speed-regulating rotary arm milling machine can process workpieces that are fixed in one place and cannot be moved, especially ring-shaped workpieces. Moreover, because a variable frequency control box is provided, the speed and direction of rotation of the rotating parts of the milling machine can be adjusted.

[0032] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A variable frequency speed-regulating rotary arm milling machine, characterized in that, include: The column has a flange structure at its lower end and is equipped with a power switch; A worm gear, which is fixedly sleeved onto the column; A rotary arm assembly, comprising a housing and a worm gear, wherein the housing is rotatably sleeved on the column, and both ends of the worm gear are rotatably connected to the housing, and the worm gear meshes with the worm wheel for transmission; A milling cutter motion assembly, wherein the milling cutter motion assembly is mounted on the housing; A frequency converter control box is installed on the housing and is electrically connected to the milling cutter motion assembly; A slip ring, wherein the fixed part of the slip ring is fixedly sleeved on the column, the rotatable part of the slip ring is connected to the outer shell, and the slip ring is electrically connected to the power switch and the frequency converter control box; The rotary arm assembly further includes an electric rotating assembly, a manual rotating assembly, a switching element, and a switching switch. The manual rotating assembly is used to manually rotate the worm gear. The electric rotating assembly is installed on the housing and rotatably connected to the worm gear. The electric rotating assembly is electrically connected to the frequency converter control box. The switching element is sleeved on the worm gear and keyed to the worm gear. The switching switch is connected to the housing and can push the switching element to slide along the worm gear axis between a first position and a second position. When the switching element is in the first position, it engages with the electric rotating assembly. When the switching element is in the second position, it disengages from the electric rotating assembly.

2. The variable frequency speed-regulating rotary arm milling machine according to claim 1, characterized in that, The electric rotating assembly includes a gear reducer and a transition connector. The gear reducer is mounted on the housing and electrically connected to the frequency converter control box. The transition connector is rotatably connected to the housing. One end of the transition connector is fixedly connected to the power output shaft of the gear reducer, and the other end of the transition connector is rotatably connected to the worm gear and has a slot on its end face. The switching switch can push the switching component to engage or disengage from the slot.

3. The variable frequency speed-regulating rotary arm milling machine according to claim 2, characterized in that, The switching switch includes a toggle handle, a connecting part, a lever, and an arc-shaped component. The connecting part is rotatably connected to the housing. One end of the connecting part is fixedly connected to the toggle handle, and the other end of the connecting part is fixedly connected to the lever. The lever is rotatably connected to the arc-shaped component. A limiting groove is formed on the side of the switching component along the circumferential direction, and the arc-shaped component is slidably disposed in the limiting groove.

4. The variable frequency speed-regulating rotary arm milling machine according to claim 1, characterized in that, The manual rotating assembly includes a first bevel gear, a rotating wheel, and a second bevel gear sleeved on the worm gear. The rotating wheel is rotatably connected to the housing and fixedly connected to the first bevel gear. The second bevel gear is fixedly connected to the worm gear and meshes with the first bevel gear.

5. The variable frequency speed-regulating rotary arm milling machine according to claim 1, characterized in that, The milling cutter motion assembly includes a first guide rail, a first slider, a first screw, a first handwheel, a second guide rail, a second slider, a second screw, a second handwheel, a milling cutter assembly, and a drive assembly. The first guide rail is fixedly connected to the outer wall of the housing in a horizontal direction. The first slider is slidably connected to the first guide rail. The first screw is rotatably connected to the housing and passes through the first slider, being threadedly connected to it. The first handwheel is fixedly connected to one end of the first screw. The second guide rail is fixedly connected to the side of the first slider facing away from the housing in a vertical direction. The second slider is slidably connected to the second guide rail. The second screw is rotatably connected to the first slider and passes through it, being threadedly connected to it. The second handwheel is fixedly connected to one end of the second screw. The drive assembly is mounted on the second slider and is electrically connected to the frequency converter control box. The drive assembly is used to drive the milling cutter assembly to rotate.

6. The variable frequency speed-regulating rotary arm milling machine according to claim 5, characterized in that, The drive assembly includes a second motor, a first transmission wheel, a second transmission wheel, and a transmission belt. The second motor is electrically connected to the frequency converter control box. The milling cutter assembly includes a cutter head and a cutter shank. The cutter shank is rotatably connected to the second slider. The second motor is fixedly connected to the second slider. The first transmission wheel is fixedly connected to the output end of the second motor. The second transmission wheel is fixedly sleeved on the cutter shank. The transmission belt is sleeved on the first transmission wheel and the second transmission wheel. The cutter head is fixedly connected to the lower end of the cutter shank.

7. The variable frequency speed-regulating rotary arm milling machine according to claim 1, characterized in that, The outer casing has heat dissipation holes.

8. The variable frequency speed-regulating rotary arm milling machine according to claim 1, characterized in that, It also includes a base flange, which is bolted to the flange structure.

9. The variable frequency speed-regulating rotary arm milling machine according to claim 1, characterized in that, It also includes a lighting fixture, which is mounted on the housing.

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