Efficient energy-saving heavy numerical control bending machine

Abstract

The invention relates to the technical field of bending machines, in particular to an efficient energy-saving heavy numerical control bending machine which comprises a bending chamber, a partition plate is arranged on the inner side of the bending chamber, a bending device used for bending plates is arranged on the inner side of the partition plate, and a bending mold used for bending different plates in different shapes is arranged in the bending device. A limiting plate used for controlling the position of a plate is arranged in the bending device, replacement devices used for facilitating the steering of a replacement mold are arranged on the two sides of the partition plate, and sliding rail assemblies used for limiting the position of the bending device are arranged in the replacement devices. The bending die is replaced through the replacing device and the sliding rail assembly.

Description

Technical Field

[0001] The invention relates to the technical field of bending machines, in particular to a high-efficiency and energy-saving heavy-duty CNC bending machine. Background Art

[0002] CNC bending machine uses various general or special molds to bend cold metal sheets into workpieces of various geometric cross-section shapes. It is a sheet forming machine designed for cold rolled sheet metal processing. It is widely used in sheet bending processing in industries such as automobiles, aircraft manufacturing, light industry, shipbuilding, containers, elevators, and railway vehicles.

[0003] The Chinese announcement number is: CN113071130B, which discloses a high-efficiency and energy-saving oil-electric hybrid CNC bending machine, including a bending machine body, the bending machine body includes an upper die and a lower die arranged up and down, the upper die is connected to a tool for bending, and the lower die is connected to a positioning groove adapted to the bending tool; the bending machine body is also connected to a driving device for driving the upper die to move up and down, the driving device includes an oil cylinder, and the output rod of the oil cylinder is connected to the upper die; an oil tank is provided in the bending machine body, the oil tank is connected to an oil pump, the oil pump is connected to a servo motor, and the servo motor drives the oil pump to work, so that the piston rod of the oil cylinder moves. The effect of omitting the switching of the proportional valve and the directional valve is achieved, and when the servo motor is started, the oil pump can be started close to pressure-free, with a fast response speed and improved work efficiency;

[0004] Although the above patent uses a servo motor to drive the oil pump, so that the piston rod of the oil cylinder can omit the proportional valve and the directional valve, and solves the problem of large energy loss of the bending machine, easy heating of the system, low energy utilization rate and high noise, it is necessary to determine whether the bending angle can meet the requirements when bending the plate. Secondly, in multiple processes, the mold needs to be adjusted and the mold needs to be replaced. The bending machine needs to be disassembled, which makes the processing efficiency cannot be guaranteed;

[0005] In view of this, we propose a high-efficiency and energy-saving heavy-duty CNC bending machine. Summary of the invention

[0006] The purpose of the present invention is to provide a high-efficiency and energy-saving heavy-duty CNC bending machine to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned object, the present invention provides a high-efficiency and energy-saving heavy-duty CNC bending machine, comprising a bending chamber, a partition is provided on the inner side of the bending chamber, a bending device for bending a plate is provided on the inner side of the partition, a bending mold for different bending shapes of the plate is provided in the bending device, a limit plate for controlling the position of the plate is provided in the bending device, a replacement device for facilitating the replacement of the mold steering is provided on both sides of the partition, and a slide rail assembly for limiting the position of the bending device is provided in the replacement device, wherein:

[0008] The plate is bent by the bending device, and the bending die is replaced by the replacement device and the slide rail assembly.

[0009] As a preferred embodiment of the present invention, a plate entry is opened on one side of the bending chamber, a support plate is fixedly connected to the inner side of the plate entry, partitions are fixedly connected on both sides of the interior of the bending chamber, and bending devices are arranged on the inner sides of the partitions on both sides, and the bending device includes an organism and a cylinder.

[0010] As a preferred embodiment of the present invention, the oil cylinder is slidably connected to the outer wall of the upper end of one side of the machine body, the bottom of the oil cylinder is telescopically connected with a regular column, one side of the lower end of the regular column is fixedly connected with a fixed plate by bolts, a bending column is slidably connected at the bottom between the fixed plate and the regular column, the bending column is connected to the machine body by a connecting column, the connecting column is slidably connected to the machine body, and the connecting column is fixedly connected to the regular column.

[0011] As a preferred embodiment of the present invention, a fixing column is fixedly connected to the inner side of the body, and the fixing column is connected to the regular column through a retractable pipe.

[0012] As a preferred embodiment of the present invention, a sliding column is slidably connected to one side of the body, a platform is fixedly connected to the top of the sliding column, guard plates are fixedly connected to both sides of the platform, bolts are fixedly connected to both sides of the platform, the guard plates are fixedly connected to both sides of the platform by bolts, the inner sides of the guard plates on both sides are fixedly connected to fixing pieces, the inner sides of the fixing pieces are fixedly connected to a telescopic rod, and the telescopic rod is fixedly connected to a regular plate on the side away from the fixing piece, wherein:

[0013] Slide blocks are fixedly connected to both sides of the platform.

[0014] As a preferred embodiment of the present invention, both ends of the regular plate are fixedly connected with extension rods, a bending mold is arranged on the top of the platform, the bending mold is a square body with multiple bending grooves of different specifications, a rotating rod is fixedly connected to the inner side of the bending mold, and the fixed column passes through the body through a telescopic column and is fixedly connected to a limiting plate.

[0015] As a preferred embodiment of the present invention, the rotating rod, the sliding block and the extending rod all pass through the partition, and the outer wall of the partition is provided with a plurality of limiting holes suitable for the movement of the rotating rod, the extending rod and the sliding block.

[0016] As a preferred embodiment of the present invention, the replacement device includes a motor, the motor is fixedly connected to the outer wall of the bending chamber, the output end of the bending chamber is fixedly connected to a first turntable, the first turntable is fixedly connected to a raised column and a limit plate on a side away from the motor, the raised column is arranged at a peripheral position of the notch of the limit plate, a second turntable is arranged on one side of the raised column, a first gear is fixedly connected to one side of the second turntable, and a plurality of arched holes are opened on the outer wall of the second turntable, wherein:

[0017] The diameter of the protruding column matches the width of the arched hole.

[0018] As a preferred embodiment of the present invention, the outer walls at both ends of the rotating rod are fixedly connected with a No. 2 gear, the No. 2 gear is meshed with the No. 1 gear, the No. 2 gear is provided with a slide rail assembly on the side away from the partition, the slide rail assembly includes a No. 1 slide rail and a No. 2 slide rail, the outer wall of the No. 1 slide rail is provided with a No. 1 strip hole, the outer wall of the No. 2 slide rail is provided with a No. 2 strip hole, the end of the rotating rod and the slider are slidably connected in the No. 1 strip hole, and the outer wall of the extension rod is slidably connected in the No. 2 strip hole, wherein:

[0019] The first slide rail is fixedly connected to the second slide rail, and the first slide rail is fixedly connected to the inner wall of the bending chamber.

[0020] As a preferred embodiment of the present invention, the replacement device includes a No. 3 turntable, the No. 3 turntable is rotatably connected to the inner wall of the bending chamber, the No. 3 turntable is fixedly connected to a threaded member on the side away from the bending chamber, the thread pitch of the threaded member matches the end diameter of the extension rod, the No. 3 turntable is fixedly connected to a toggle rod on the side away from the threaded member, and the toggle rod is fixedly connected to a toggle member at one end away from the No. 3 turntable, wherein:

[0021] The outer wall of the rotating shaft of the No. 3 rotating disk and the rotating shaft of the No. 1 rotating disk on both sides is sleeved with a transmission belt for driving the No. 3 rotating disk and the No. 1 rotating disk.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In this high-efficiency and energy-saving heavy-duty CNC bending machine, the staff places the metal sheet to be bent from the plate inlet on the top of the bending die through the limit plate, uses the bending column to press down and buffer it to bend the sheet, and uses the fixed column and the connected pipeline to replace a small amount of oil in the cylinder to dissipate heat in the cylinder. The replaced oil will be cooled in the fixed column and recycled again during the next operation.

[0024] 2. In this high-efficiency and energy-saving heavy-duty CNC bending machine, the No. 1 turntable and the raised column drive the No. 2 turntable to rotate together under the drive of the motor, and the extension rods and regular plates on both sides loosen the bending mold under the action of the transmission belt. At the same time, the bending mold is lifted under the action of the toggle member and the toggle rod. The No. 1 turntable will drive the No. 2 gear to rotate 90 degrees, so that the bending groove on one side of the bending mold is replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an overall three-dimensional schematic diagram of the high-efficiency and energy-saving heavy-duty CNC bending machine of the present invention;

[0026] Figure 2 It is an overall cross-sectional schematic diagram of the high-efficiency and energy-saving heavy-duty CNC bending machine of the present invention;

[0027] Figure 3 It is a three-dimensional schematic diagram of the interior of the high-efficiency and energy-saving heavy-duty CNC bending machine of the present invention;

[0028] Figure 4 It is a three-dimensional schematic diagram of the inner side bending device of the partition of the high-efficiency and energy-saving heavy-duty CNC bending machine of the present invention;

[0029] Figure 5 It is a three-dimensional schematic diagram of the replacement device of the high-efficiency and energy-saving heavy-duty CNC bending machine of the present invention;

[0030] Figure 6 It is an enlarged schematic diagram of part A of the high-efficiency and energy-saving heavy-duty CNC bending machine of the present invention;

[0031] Figure 7 It is a three-dimensional schematic diagram of the slide rail assembly of the high-efficiency and energy-saving heavy-duty CNC bending machine of the present invention;

[0032] Figure 8 It is a schematic diagram of some details of the replacement device of the high-efficiency and energy-saving heavy-duty CNC bending machine of the present invention;

[0033] The meaning of each number in the figure is:

[0034] 1. Bending chamber; 11. Plate inlet; 111. Support plate; 12. Partition plate; 2. Bending device; 21. Machine body; 211. Fixed column; 22. Oil cylinder; 23. Regular column; 231. Fixed plate; 232. Bending column; 24. Sliding column; 241. Platform; 2411. Guard plate; 2412. Bolt; 2413. Sliding block; 242. Fixing piece; 2421. Telescopic rod; 243. Regular plate; 2431. Extension rod; 25. Bending die; 251. Rotating rod; 26. Limiting plate;

[0035] 3. Replacement device; 31. Motor; 32. Turntable No. 1; 321. Raised column; 322. Limiting plate; 33. Turntable No. 2; 331. Arched hole; 332. Gear No. 1; 34. Gear No. 2; 35. Slide rail assembly; 351. Slide rail No. 1; 3511. Strip hole No. 1; 352. Slide rail No. 2; 3521. Strip hole No. 2; 36. Turntable No. 3; 361. Threaded part; 362. Toggle rod; 363. Toggle part. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] Embodiment 1

[0039] See also Figure 1-Figure 8 As shown, this embodiment provides a high-efficiency and energy-saving heavy-duty CNC bending machine, including a bending chamber 1, a partition 12 is arranged on the inner side of the bending chamber 1, a bending device 2 for bending a plate is arranged on the inner side of the partition 12, a bending mold 25 for different bending shapes of the plate is arranged in the bending device 2, a limit plate 26 for controlling the position of the plate is arranged in the bending device 2, and a replacement device 3 for facilitating the replacement of the mold steering is arranged on both sides of the partition 12, and a slide rail assembly 35 for limiting the position of the bending device 2 is arranged in the replacement device 3, wherein: the plate is bent by the bending device 2, and the bending mold 25 is replaced by the replacement device 3 and the slide rail assembly 35, a plate entry 11 is opened on one side of the bending chamber 1, and a support plate 111 is fixedly connected to the inner side of the plate entry 11, partitions 12 are fixedly connected on both sides of the interior of the bending chamber 1, and bending devices 2 are arranged on the inner sides of the partitions 12 on both sides, and the bending device 2 includes an organism 21 and a cylinder 22.

[0040] like Figure 2-Figure 5As shown, the oil cylinder 22 is slidably connected to the outer wall of the upper end of one side of the body 21, the bottom of the oil cylinder 22 is telescopically connected with a regular column 23, one side of the lower end of the regular column 23 is fixedly connected with a fixing plate 231 by a bolt 2412, a bending column 232 is slidably connected at the bottom between the fixing plate 231 and the regular column 23, the bending column 232 is connected to the body 21 through a connecting column, the connecting column is slidably connected to the body 21, the connecting column is fixedly connected to the regular column 23, the inner side of the body 21 is fixedly connected with a fixing column 211, the fixing column 211 is connected to the regular column 23 through a telescopic pipe, and one side of the body 21 is slidable. A sliding column 24 is movably connected, the top of the sliding column 24 is fixedly connected to a platform 241, guard plates 2411 are fixedly connected to both sides of the platform 241, bolts 2412 are fixedly connected to both sides of the platform 241, the guard plates 2411 are fixedly connected to both sides of the platform 241 by bolts 2412, the inner sides of the guard plates 2411 on both sides are fixedly connected to fixing parts 242, the inner sides of the fixing parts 242 are fixedly connected to a telescopic rod 2421, the telescopic rod 2421 is fixedly connected to a regular plate 243 on the side away from the fixing parts 242, wherein: sliders 2413 are fixedly connected to both sides of the platform 241.

[0041] It can be seen that during the working process of the bending machine, Figure 2 As shown, the staff places the metal sheet to be bent from the plate inlet 11 on the top of the bending die 25, and through the limit of the limit plate 26, the regular plate 243 slides downward under the drive of the oil cylinder 22 to bend the sheet on the bending die 25. At this time, the bending column 232 will move up a short distance in the space between the regular column 23 and the fixed plate 231, and the sheet will not start to be bent until it reaches the top position of the space between the regular column 23 and the fixed plate 231. At this time, the oil cylinder 22 forms a high and low pressure difference through the pipeline connected to the fixed column 211 during operation, and a small amount of oil in the oil cylinder 22 is replaced to dissipate heat in the oil cylinder 22. The replaced oil will be cooled in the fixed column 211 and recycled again during the next operation.

[0042] Embodiment 2

[0043] Different from the first embodiment, in order to realize the rapid replacement of the bending mold 25 and the bending column 232, as shown in FIG. Figure 6-Figure 8As shown, the replacement device 3 includes a motor 31, the motor 31 is fixedly connected to the outer wall of the bending chamber 1, the output end of the bending chamber 1 is fixedly connected to the first turntable 32, the first turntable 32 is fixedly connected to a protruding column 321 and a limiting plate 322 on the side away from the motor 31, the protruding column 321 is arranged at a peripheral position of the notch of the limiting plate 322, a second turntable 33 is arranged on one side of the protruding column 321, a first gear 332 is fixedly connected to one side of the second turntable 33, a plurality of arched holes 331 are opened on the outer wall of the second turntable 33, wherein: the diameter of the protruding column 321 matches the width of the arched hole 331, and the outer walls of both ends of the rotating rod 251 are fixedly connected to the second gear 332. 4. The second gear 34 is meshed with the first gear 332. The second gear 34 is provided with a slide rail assembly 35 on the side away from the partition 12. The slide rail assembly 35 includes a first slide rail 351 and a second slide rail 352. The outer wall of the first slide rail 351 is provided with a first strip hole 3511, and the outer wall of the second slide rail 352 is provided with a second strip hole 3521. The end of the rotating rod 251 and the slider 2413 are slidably connected in the first strip hole 3511, and the outer wall of the extension rod 2431 is slidably connected in the second strip hole 3521, wherein: the first slide rail 351 is fixedly connected with the second slide rail 352, and the first slide rail 351 is fixedly connected to the inner wall of the bending chamber 1.

[0044] like Figure 7 As shown, the replacement device 3 includes a No. 3 turntable 36, which is rotatably connected to the inner wall of the bending chamber 1, and the No. 3 turntable 36 is fixedly connected with a threaded member 361 on the side away from the bending chamber 1, and the thread pitch of the threaded member 361 matches the end diameter of the extension rod 2431, and the No. 3 turntable 36 is fixedly connected with a toggle rod 362 on the side away from the threaded member 361, and the toggle rod 362 is fixedly connected with a toggle member 363 at one end away from the No. 3 turntable 36, wherein: the outer wall of the rotating shaft of the No. 3 turntable 36 on both sides and the rotating shaft of the No. 1 turntable 32 is provided with a transmission belt for driving the No. 3 turntable 36 and the No. 1 turntable 32.

[0045] The first rotating disk 32 is driven by the motor 31 to rotate, and the second rotating disk 32 is driven by the motor 31 to rotate. The second rotating disk 32 is driven by the motor 31 to rotate. The second rotating disk 32 is driven by the motor 31 to rotate. The second rotating disk 33 is driven by the motor 31 to rotate. The second rotating disk 33 is driven by the motor 31 to rotate. During the rotation of the third turntable 36, the toggle rod 362 and the toggle member 363 will be driven to rotate in the direction of the rotating rod 251 to lift the rotating rod 251 and the bending mold 25 and make the bending mold 25 move upward. During the upward movement of the bending mold 25, the second gear 34 will be driven to move upward until the second gear 34 is meshed with each other. At the same time, under the drive of the motor 31, the first gear 332 drives the second gear 34 to rotate. At this time, the first gear 332 rotates 90 degrees, and the second gear 34 is also driven to rotate 90 degrees, so that the bending groove on one side of the square bending mold 25 is transformed into the bending groove on the other side. At this time, the staff disassembles the bolts 2412 on the fixing plate 231 and removes the bending column 232 to replace the bending column 232 that is compatible with the bending mold 25. In this way, the bending column 232 can be replaced together with the bending mold 25 during the replacement device 3, which can improve the replacement efficiency to a certain extent.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-efficiency and energy-saving heavy-duty CNC bending machine, comprising a bending chamber (1), characterized in that: A partition (12) is arranged on the inner side of the bending chamber (1), a bending device (2) for bending a plate is arranged on the inner side of the partition (12), a bending die (25) for bending different plate shapes is arranged in the bending device (2), a limit plate (26) for controlling the position of the plate is arranged in the bending device (2), a replacement device (3) for facilitating the replacement of the die direction is arranged on both sides of the partition (12), and a slide rail assembly (35) for limiting the position of the bending device (2) is arranged in the replacement device (3), wherein: The plate is bent by the bending device (2), and the bending die (25) is replaced by using the replacement device (3) and the slide rail assembly (35).

2. The high-efficiency and energy-saving heavy-duty CNC bending machine according to claim 1 is characterized in that: A plate inlet (11) is provided on one side of the bending chamber (1), a support plate (111) is fixedly connected to the inner side of the plate inlet (11), partitions (12) are fixedly connected to the inner sides of the bending chamber (1), and bending devices (2) are provided on the inner sides of the partitions (12) on both sides, wherein the bending device (2) includes an organism (21) and an oil cylinder (22).

3. The high-efficiency and energy-saving heavy-duty CNC bending machine according to claim 2 is characterized in that: The oil cylinder (22) is slidably connected to an upper outer wall of one side of the machine body (21); the bottom of the oil cylinder (22) is telescopically connected to a regular column (23); a fixing plate (231) is fixedly connected to one side of the lower end of the regular column (23) by bolts; a bending column (232) is slidably connected to the bottom between the fixing plate (231) and the regular column (23); the bending column (232) is connected to the machine body (21) by a connecting column; the connecting column is slidably connected to the machine body (21); and the connecting column is fixedly connected to the regular column (23).

4. The high-efficiency and energy-saving heavy-duty CNC bending machine according to claim 3 is characterized in that: A fixing column (211) is fixedly connected to the inner side of the machine body (21), and the fixing column (211) is connected to the regular column (23) via a retractable pipe.

5. The high-efficiency and energy-saving heavy-duty CNC bending machine according to claim 4 is characterized in that: A sliding column (24) is slidably connected to one side of the machine body (21); a platform (241) is fixedly connected to the top of the sliding column (24); guard plates (2411) are fixedly connected to both sides of the platform (241); bolts (2412) are fixedly connected to both sides of the platform (241); the guard plates (2411) are fixedly connected to both sides of the platform (241) by bolts (2412); fixing members (242) are fixedly connected to the inner sides of the guard plates (2411) on both sides; a telescopic rod (2421) is fixedly connected to the inner side of the fixing member (242); and a regular plate (243) is fixedly connected to the telescopic rod (2421) on the side away from the fixing member (242), wherein: Slide blocks (2413) are fixedly connected to both sides of the platform (241).

6. The high-efficiency and energy-saving heavy-duty CNC bending machine according to claim 5 is characterized in that: Both ends of the regular plate (243) are fixedly connected to extension rods (2431), a bending mold (25) is arranged on the top of the platform (241), the bending mold (25) is a square body with a plurality of bending grooves of different specifications, a rotating rod (251) is fixedly connected to the inner side of the bending mold (25), and the fixed column (211) passes through the body (21) through a telescopic column and is fixedly connected to the limiting plate (26).

7. The high-efficiency and energy-saving heavy-duty CNC bending machine according to claim 6 is characterized in that: The rotating rod (251), the sliding block (2413) and the extending rod (2431) all penetrate the partition (12), and the outer wall of the partition (12) is provided with a plurality of limiting holes suitable for the movement of the rotating rod (251), the extending rod (2431) and the sliding block (2413).

8. The high-efficiency and energy-saving heavy-duty CNC bending machine according to claim 7 is characterized in that: The replacement device (3) comprises a motor (31), the motor (31) being fixedly connected to the outer wall of the bending chamber (1), the output end of the bending chamber (1) being fixedly connected to a first turntable (32), the first turntable (32) being fixedly connected to a protruding column (321) and a limiting disk (322) on a side away from the motor (31), the protruding column (321) being arranged at a position around a notch of the limiting disk (322), a second turntable (33) being arranged on one side of the protruding column (321), a first gear (332) being fixedly connected to one side of the second turntable (33), a plurality of arched holes (331) being provided on the outer wall of the second turntable (33), wherein: The diameter of the protruding column (321) matches the width of the arched hole (331).

9. The high-efficiency and energy-saving heavy-duty CNC bending machine according to claim 8 is characterized in that: The outer walls at both ends of the rotating rod (251) are fixedly connected with a second gear (34), the second gear (34) is meshingly connected with the first gear (332), the second gear (34) is provided with a slide rail assembly (35) on the side away from the partition (12), the slide rail assembly (35) includes a first slide rail (351) and a second slide rail (352), the outer wall of the first slide rail (351) is provided with a first strip hole (3511), the outer wall of the second slide rail (352) is provided with a second strip hole (3521), the end of the rotating rod (251) and the slider (2413) are slidably connected in the first strip hole (3511), and the outer wall of the extension rod (2431) is slidably connected in the second strip hole (3521), wherein: The first slide rail (351) is fixedly connected to the second slide rail (352), and the first slide rail (351) is fixedly connected to the inner wall of the bending chamber (1).

10. The high-efficiency and energy-saving heavy-duty CNC bending machine according to claim 9, characterized in that: The replacement device (3) comprises a third turntable (36), the third turntable (36) being rotatably connected to the inner wall of the bending chamber (1), the third turntable (36) being fixedly connected to a threaded member (361) on a side away from the bending chamber (1), the thread pitch of the threaded member (361) being matched with the end diameter of the extension rod (2431), the third turntable (36) being fixedly connected to a toggle rod (362) on a side away from the threaded member (361), and the toggle rod (362) being fixedly connected to a toggle member (363) at an end away from the third turntable (36), wherein: The rotating shafts of the third rotating disk (36) and the outer wall of the rotating shaft of the first rotating disk (32) on both sides are sleeved with a transmission belt for driving the third rotating disk (36) and the first rotating disk (32).

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