High-precision five-axis gantry machining center for machining automobile parts

Abstract

The invention relates to the field of machine tool facilities, in particular to a high-precision five-axis gantry machining center for machining automobile parts, which comprises a platform and a gantry machining center body mounted in the middle of the upper end of the platform, a pushing part is mounted at the side edge of the upper end of the platform, and a pushing plate is connected to the end part of the pushing part. The push plate is attached to a workbench of the gantry machining center body, the two ends of the push plate extend to form blocking lugs, a plurality of push claws are evenly distributed and extend to the lower end of the push plate, and a material receiving hopper is fixedly installed at the position, close to the front edge, of the upper end of the platform. Scrap iron on the workbench can be automatically cleaned and collected, the labor intensity of workers is effectively reduced, meanwhile, the scrap iron collecting capacity of the receiving hopper is increased, the scrap iron collected in the receiving hopper can be conveniently treated, and use is convenient.

Description

Technical Field

[0001] The present invention relates to the field of machine tool facilities, and particularly relates to a high-precision five-axis gantry machining center for machining automotive parts. Background Art

[0002] During the machining of automotive parts, a five-axis gantry machining center is required. A five-axis gantry machining center refers to a machining center in which the axis of the spindle is vertically arranged with respect to the workbench. The overall structure is a machining center machine with a gantry structure framework composed of two columns and a top beam. There is also a crossbeam between the two columns, which has the characteristics of high precision and fast machining. However, after the existing high-precision five-axis gantry machining center for machining automotive parts finishes machining the workpiece, generally, the operator holds a cleaning instrument to clean the iron chips milled on the workbench, and this cleaning process greatly increases the labor intensity of the operator. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies in the background art and propose a high-precision five-axis gantry machining center for machining automotive parts.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a high-precision five-axis gantry machining center for machining automotive parts, including a floor and a gantry machining center body installed in the middle of the upper end of the floor. A pusher is installed at the side edge of the upper end of the floor. The end of the pusher is connected to a push plate, the push plate is attached to the workbench of the gantry machining center body, both ends of the push plate extend with retaining ears, and a plurality of push claws are uniformly arranged and extended at the lower end of the push plate. A receiving hopper is fixedly installed at the upper end of the floor near the front edge.

[0005] Preferably, the pusher includes a bearing seat fixedly installed at the side edge of the upper end of the floor. A threaded rod is rotatably installed on the upper part of the side surface of the bearing seat. A pushing seat is screwed on the outer side of the threaded rod. The front end of the pushing seat is connected to a servo push cylinder, and the output end of the servo push cylinder is connected to the push plate. A servo motor is fixedly installed in front of the bearing seat, and the output end of the servo motor is fixed to the end of the threaded rod.

[0006] Preferably, a guide rod is fixedly installed at the lower part of the side surface of the bearing seat. The pushing seat is attached to the outer surface of the guide rod. An extending seat extends from the side surface of the pushing seat, and the servo push cylinder is fixed on the extending seat. A fixing frame is fixedly installed in the middle of the upper end of the push plate, and the end of the fixing frame is fixed to the output end of the servo push cylinder.

[0007] Preferably, a guide sleeve is fixedly installed at the upper end of the extending seat, and the guide sleeve is fixed to the rear end of the servo push cylinder. A guide post is fitted inside the guide sleeve, and the guide post penetrates out from the upper end of the guide sleeve and is embedded inside the fixing frame.

[0008] Preferably, a rotating rod is rotatably installed at the front edge of the upper end of the platform. A transmission shaft is coaxially arranged on the front side of the rotating rod. The transmission shaft is rotatably installed on the platform. The transmission shaft is connected to the threaded rod. One end of the transmission shaft is fixedly installed with a first top seat. Both ends of the rotating rod are fixedly installed with second top seats. A receiving cavity is formed at the rear end inside the material receiving hopper. A pushing seat is fitted inside the receiving cavity. An L-shaped cover is arranged at the front part of the upper end of the material receiving hopper. A connecting block is fixedly installed at the front edge of the upper end of the L-shaped cover. The end of the connecting block is rotatably connected to the front end of the material receiving hopper.

[0009] Preferably, top frames are fixedly installed on both sides of the pushing seat. The top frames penetrate out from the side surface of the material receiving hopper. Connecting rods are rotatably installed at the ends of both top frames. The end of one of the connecting rods is rotatably connected to the second top seat at one end of the rotating rod. The end of the other connecting rod is rotatably installed between the end of the second top seat at the other end of the rotating rod and the end of the first top seat.

[0010] Preferably, sliding grooves are formed through both sides of the material receiving hopper. The top frames are fitted inside the sliding grooves. A guiding seat is fixedly installed above the sliding grooves on the side surface of the material receiving hopper. A locking ear is fixedly installed at the upper end corner of the L-shaped cover. A locking seat is fitted at the lower end of the locking ear. The end of the locking seat is fixed to the material receiving hopper. A prism is fitted and penetrated through the guiding seat. One end of the prism is fixedly installed with a locking groove seat. The locking groove seat is fitted on the outer sides of the locking ear and the locking seat. A spring body is wound around the outer side of the prism. Both ends of the spring body are fixed to the guiding seat and the locking groove seat respectively.

[0011] Preferably, a vertical plate is arranged below the front of the bearing seat. The lower end of the vertical plate is fixed to the platform. Two first connecting shafts are rotatably installed through the front end of the vertical plate. A synchronous belt is connected between one ends of the two first connecting shafts. Bevel gears are coaxially embedded at the other end of the transmission shaft and the other end of one of the first connecting shafts. The two bevel gears are meshed with each other. A second connecting shaft is rotatably installed through the upper end of the vertical plate. A second large gear is coaxially embedded at one end of the second connecting shaft. A second small gear is coaxially embedded at the other end of the other first connecting shaft. The second small gear is meshed with the second large gear. A first small gear is coaxially embedded at the other end of the second connecting shaft. A first large gear is coaxially embedded at the outer surface near the end of the threaded rod. The first large gear is meshed with the first small gear.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The rotating threaded rod can drive the push seat to slide on the guide rod, and then drive the push plate to slide on the workbench of the gantry machining center body to push the iron filings and other waste materials on the workbench. At the same time, the push claws at the lower end of the push plate push the iron filings and other waste materials in the gap of the workbench to push them into the receiving hopper for collection. The process does not require manual cleaning by the staff, which effectively reduces the labor intensity of the staff.

[0014] 2. When the threaded rod drives the push plate to clean the iron filings, it will accelerate the rotation of the No. 2 connecting shaft through the No. 1 large gear and the No. 1 small gear, and then further accelerate the rotation of the No. 1 connecting shaft through the No. 2 large gear and the No. 2 small gear, thereby driving the transmission shaft and the rotating rod to rotate, so that the rotating rod and the No. 2 top seat and the No. 1 top seat on the transmission shaft rotate synchronously, thereby driving the connecting rod to move to drive the pusher seat to continuously slide back and forth in the receiving hopper, so as to push and squeeze the iron filings entering the receiving hopper, so that the fluffy iron filings can be compacted, thereby increasing the capacity of the receiving hopper to collect iron filings for easy use.

[0015] 3. By directly turning the locking groove seat, the locking groove seat supported by the spring body can be separated from the locking ear and the outer side of the locking seat, so that the locking ear can be separated from the locking seat when the clamping of the locking groove seat is lost. Then, the L-shaped cover can be directly flipped to open the receiving hopper to process the iron filings collected in the hopper. The process is simple to operate and further convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a high-precision five-axis gantry machining center for machining automobile parts according to the present invention;

[0017] Figure 2 This is a schematic diagram of a servo motor of a high-precision five-axis gantry machining center for machining automobile parts of the present invention;

[0018] Figure 3 This is a schematic diagram of the No. 1 large gear of a high-precision five-axis gantry machining center for machining automobile parts of the present invention;

[0019] Figure 4 A schematic diagram of a push plate of a high-precision five-axis gantry machining center for machining automobile parts according to the present invention;

[0020] Figure 5 This is an internal view of a material receiving hopper of a high-precision five-axis gantry machining center for machining automobile parts according to the present invention;

[0021] Figure 6 The invention provides a high-precision five-axis gantry machining center for machining automobile parts. Figure 1 A magnified view of middle;

[0022] Figure 7 For a high-precision five-axis gantry machining center for machining automotive parts of the present invention Figure 1 The enlarged view of B in

[0023] In the figure: 1, floor; 2, gantry machining center body; 3, push plate; 4, fixing frame; 5, locking ear; 6, servo motor; 7, rotating rod; 8, receiving hopper; 9, first large gear; 10, threaded rod; 11, guide rod; 12, pushing seat; 13, extending seat; 14, servo push cylinder; 15, synchronous belt; 16, guide post; 17, guide sleeve; 18, bearing seat; 19, first small gear; 20, second large gear; 21, second small gear; 22, helical gear; 23, first connecting shaft; 24, vertical plate; 25, second connecting shaft; 26, transmission shaft; 27, push claw; 28, retaining ear; 29, connecting block; 30, chute; 31, accommodating cavity; 32, pushing seat; 33, L-shaped cover; 34, first top seat; 35, connecting rod; 36, locking seat; 37, second top seat; 38, top frame; 39, guide seat; 40, prism; 41, spring body; 42, locking groove seat. Specific embodiments

[0024] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0025] As Figures 1-7 shown, a high-precision five-axis gantry machining center for machining automotive parts includes a floor 1 and a gantry machining center body 2 installed in the middle of the upper end of the floor 1. A pushing member is installed at the side edge of the upper end of the floor 1, and the end of the pushing member is connected to a push plate 3. The push plate 3 is attached to the workbench of the gantry machining center body 2. The push plate 3 serves to push the iron filings on the workbench. Retaining ears 28 extend from both ends of the push plate 3, and the retaining ears 28 prevent the iron filings from falling to both sides. A plurality of push claws 27 are uniformly arranged and extended at the lower end of the push plate 3. The shape of the push claws 27 is the same as the shape of the gaps on the workbench of the gantry machining center body 2, so as to facilitate the push claws 27 to push the iron filings in the gaps. A receiving hopper 8 is fixedly installed at the upper end of the floor 1 near the front edge, and the receiving hopper 8 serves to receive and collect the iron filings.

[0026] The pusher includes a carrier seat 18 fixedly installed at the upper side edge of the floor 1. A threaded rod 10 is rotatably installed on the upper part of the side surface of the carrier seat 18. The carrier seat 18 serves to carry the threaded rod 10. A pusher seat 12 is screwed onto the outer side of the threaded rod 10. The front end of the pusher seat 12 is connected to a servo push cylinder 14. The threaded rod 10 serves to drive the pusher seat 12 to move. The output end of the servo push cylinder 14 is connected to the push plate 3. The servo push cylinder 14 serves to drive the push plate 3 to lift and lower. A servo motor 6 is fixedly installed in front of the carrier seat 18. The servo motor 6 serves to drive the threaded rod 10 to move. The output end of the servo motor 6 is fixed to the end of the threaded rod 10.

[0027] A guide rod 11 is fixedly installed at the lower part of the side surface of the carrier seat 18. The pusher seat 12 is attached to the outer surface of the guide rod 11. The guide rod 11 serves to guide the pusher seat 12. An extension seat 13 extends from the side surface of the pusher seat 12. The servo push cylinder 14 is fixed to the extension seat 13. The extension seat 13 serves to carry the servo push cylinder 14. A fixing frame 4 is fixedly installed in the middle of the upper end of the push plate 3. The end of the fixing frame 4 is fixed to the output end of the servo push cylinder 14. The fixing frame 4 serves to connect and fix.

[0028] A guide sleeve 17 is fixedly installed at the upper end of the extension seat 13. The guide sleeve 17 is fixed to the rear end of the servo push cylinder 14. The guide sleeve 17 and the guide post 16 serve to guide the push plate 3. The guide post 16 is fitted inside the guide sleeve 17. The guide post 16 penetrates out from the upper end of the guide sleeve 17. The guide post 16 is penetrated and embedded inside the fixing frame 4.

[0029] A rotating rod 7 is rotatably installed at the front edge of the upper end of the floor 1. A transmission shaft 26 is coaxially arranged on the front side of the rotating rod 7. The rotating rod 7 and the transmission shaft 26 serve for transmission. The transmission shaft 26 is rotatably installed on the floor 1. The transmission shaft 26 is connected to the threaded rod 10. A first top seat 34 is fixedly installed at one end of the transmission shaft 26. Second top seats 37 are fixedly installed at both ends of the rotating rod 7. The first top seat 34 and the second top seats 37 serve to drive the connecting rod 35 to move. A receiving cavity 31 is formed at the rear end inside the material receiving hopper 8. A pushing seat 32 is fitted inside the receiving cavity 31. The receiving cavity 31 serves to receive the pushing seat 32. The pushing seat 32 serves to extrude iron filings. An L-shaped cover 33 is arranged at the front part of the upper end of the material receiving hopper 8. A connecting block 29 is fixedly installed at the front edge of the upper end of the L-shaped cover 33. The connecting block 29 serves for connection. The end of the connecting block 29 is rotatably connected to the front end of the material receiving hopper 8.

[0030] On both sides of the material pushing seat 32, top frames 38 are fixedly installed. The top frames 38 penetrate out from the side of the material receiving hopper 8. The top frames 38 play a role of being driven by the connecting rod 35 to drive the material pushing seat 32 to move back and forth to compact the iron filings. At the ends of both top frames 38, connecting rods 35 are rotatably installed. One end of one connecting rod 35 is rotatably connected to the second top seat 37 at one end of the rotating rod 7, and the other end of the other connecting rod 35 is rotatably installed between the ends of the second top seat 37 at the other end of the rotating rod 7 and the end of the first top seat 34. The connecting rod 35 plays a role of connecting and transmitting power.

[0031] On both sides of the material receiving hopper 8, sliding grooves 30 are respectively penetrated. The top frames 38 are fitted inside the sliding grooves 30. The sliding grooves 30 play a role of allowing the top frames 38 to penetrate out and guiding the top frames 38. Above the sliding grooves 30 on the side of the material receiving hopper 8, a guiding seat 39 is fixedly installed. At the upper corner of the L-shaped cover 33, a locking ear 5 is fixedly installed. At the lower end of the locking ear 5, a locking seat 36 is fitted and installed. The end of the locking seat 36 is fixed to the material receiving hopper 8. Inside the guiding seat 39, a prism 40 is fitted and penetrated. The guiding seat 39 plays a role of carrying the prism 40. One end of the prism 40 is fixedly installed with a locking groove seat 42. The prism 40 plays a role of guiding the locking groove seat 42. The locking groove seat 42 is fitted on the outer sides of the locking ear 5 and the locking seat 36. The locking groove seat 42 plays a role of pressing the locking ear 5 and the locking seat 36 together. A spring body 41 is wound around the outer side of the prism 40. The two ends of the spring body 41 are respectively fixed to the guiding seat 39 and the locking groove seat 42. The spring body 41 plays a role of pushing the locking groove seat 42 so that the locking groove seat 42 can be located on the outer sides of the locking ear 5 and the locking seat 36.

[0032] A vertical plate 24 is provided below the front of the bearing seat 18. The lower end of the vertical plate 24 is fixed to the floor 1. The vertical plate 24 serves to support the first connecting shaft 23 and the second connecting shaft 25. Two first connecting shafts 23 are rotatably installed through the front end of the vertical plate 24. A synchronous belt 15 is connected between one ends of the two first connecting shafts 23. The synchronous belt 15 serves to connect the two first connecting shafts 23 together. Helical gears 22 are coaxially inlaid at the other ends of the transmission shaft 26 and one of the first connecting shafts 23 respectively. The helical gears 22 serve to connect the transmission shaft 26 and one of the first connecting shafts 23 together. The two helical gears 22 are meshed with each other. A second connecting shaft 25 is rotatably installed through the upper end of the vertical plate 24. A second large gear 20 is coaxially inlaid at one end of the second connecting shaft 25. A second small gear 21 is coaxially inlaid at the other end of the other first connecting shaft 23. The second large gear 20 and the second small gear 21 serve for transmission and accelerating rotation. The second small gear 21 is meshed with the second large gear 20. A first small gear 19 is coaxially inlaid at the other end of the second connecting shaft 25. A first large gear 9 is coaxially inlaid at the outer surface of the threaded rod 10 near the end. The first large gear 9 is meshed with the first small gear 19. The first large gear 9 and the first small gear 19 serve for transmission and accelerating rotation.

[0033] During operation, the gantry machining center body 2 can be used to machine the workpiece on the workbench. After the machining is completed and when the workbench of the gantry machining center body 2 needs to be cleaned, the servo motor 6 will operate to drive the threaded rod 10 to rotate, so that the pushing seat 12 can slide backward on the guide rod 11, enabling the push plate 3 to move to the rear of the workbench of the gantry machining center body 2. Subsequently, the servo push cylinder 14 operates to drive the push plate 3 to move downward to be flush with the workbench. Then, the pushing seat 12 moves forward to drive the push plate 3 to move forward, making the push plate 3 fit against the upper end surface of the workbench and the push claws 27 fit into the gaps of the workbench to move, so as to push the iron filings into the front receiving hopper 8. And when the threaded rod 10 drives the push plate 3 to move to clean the iron filings, it will also pass through the first large gear 9, the first small gear 19 to accelerate the rotation of the second connecting shaft 25, and then through the second large gear 20, the second small gear 21 to further accelerate the rotation of the first connecting shaft 23, and then drive the transmission shaft 26 and the rotating rod 7 to rotate, so that the second top seat 37 and the first top seat 34 on the rotating rod 7 and the transmission shaft 26 rotate synchronously, thereby driving the connecting rod 35 to move to drive the material pushing seat 32 to continuously slide back and forth in the receiving hopper 8, so as to push and extrude the iron filings entering the receiving hopper 8, making the fluffy iron filings compacted, thereby increasing the capacity of the receiving hopper 8 to collect iron filings. After the receiving hopper 8 is filled with iron filings, the locking groove seat 42 can be directly toggled, so that the locking groove seat 42 supported by the spring body 41 disengages from the outside of the locking ear 5 and the locking seat 36, enabling the locking ear 5 to separate from the locking seat 36 without the clamping of the locking groove seat 42. Then, the L-shaped cover 33 can be directly flipped to open the receiving hopper 8 to process the iron filings collected in the receiving hopper 8.

[0034] In the present invention, terms such as "installation", "connection", "attachment", "fixation", etc. shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the description of this specification, if descriptions such as "one embodiment", "some embodiments", "specific embodiments", etc. appear, it means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0036] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision five-axis gantry machining center for machining automobile parts, comprising a platform (1) and a gantry machining center body (2) mounted on the middle of the upper end of the platform (1), characterized in that: A pushing member is installed at the upper side edge of the platform (1), and the end of the pushing member is connected to a push plate (3). The push plate (3) is attached to the workbench of the gantry machining center body (2). Both ends of the push plate (3) are extended with stop ears (28), and a plurality of push claws (27) are evenly arranged and extended from the lower end of the push plate (3). A material receiving hopper (8) is fixedly installed near the front edge of the upper end of the platform (1).

2. A high-precision five-axis gantry machining center for automobile parts processing according to claim 1, characterized in that: The pushing member comprises a bearing seat (18) fixedly mounted at the upper side edge of the platform (1); a threaded rod (10) is rotatably mounted on the upper side of the bearing seat (18); a pushing seat (12) is screwed onto the outer side of the threaded rod (10); a servo push cylinder (14) is connected to the front end of the pushing seat (12); an output end of the servo push cylinder (14) is connected to the push plate (3); a servo motor (6) is fixedly mounted in front of the bearing seat (18); and an output end of the servo motor (6) is fixed to the end of the threaded rod (10).

3. A high-precision five-axis gantry machining center for automobile parts processing according to claim 2, characterized in that: A guide rod (11) is fixedly installed on the lower part of the side of the bearing seat (18), the pushing seat (12) is in contact with the outer surface of the guide rod (11), an extension seat (13) is extended from the side of the pushing seat (12), the servo push cylinder (14) is fixed on the extension seat (13), and a fixing frame (4) is fixedly installed on the middle part of the upper end of the push plate (3), and the end of the fixing frame (4) is fixed to the output end of the servo push cylinder (14).

4. A high-precision five-axis gantry machining center for automobile parts processing according to claim 3, characterized in that: A guide sleeve (17) is fixedly mounted on the upper end of the extension seat (13), and the guide sleeve (17) is fixed to the rear end of the servo push cylinder (14). A guide column (16) is fitted inside the guide sleeve (17), and the guide column (16) extends from the upper end of the guide sleeve (17). The guide column (16) is embedded in the inner side of the fixed frame (4).

5. The high-precision five-axis gantry machining center for automobile parts processing according to claim 2, characterized in that: A rotating rod (7) is rotatably mounted at the front edge of the upper end of the platform (1), a transmission shaft (26) is coaxially arranged on the positive side of the rotating rod (7), the transmission shaft (26) is rotatably mounted on the platform (1), the transmission shaft (26) is connected to the threaded rod (10), one end of the transmission shaft (26) is fixedly mounted with a No. 1 top seat (34), both ends of the rotating rod (7) are fixedly mounted with a No. 2 top seat (37), the rear end of the inner part of the receiving hopper (8) is provided with a accommodating cavity (31), the interior of the accommodating cavity (31) is fitted with a pushing seat (32), the upper front part of the receiving hopper (8) is provided with an L-shaped cover (33), the upper front edge of the L-shaped cover (33) is fixedly mounted with a connecting block (29), the end of the connecting block (29) is rotatably connected to the front end of the receiving hopper (8).

6. A high-precision five-axis gantry machining center for automobile parts processing according to claim 5, characterized in that: Both sides of the pusher seat (32) are fixedly mounted with a top frame (38), the top frame (38) penetrates from the side of the receiving hopper (8), and the ends of the two top frames (38) are rotatably mounted with connecting rods (35), one end of the connecting rod (35) is rotatably connected to the second top seat (37) at one end of the rotating rod (7), and the other end of the connecting rod (35) is rotatably mounted between the end of the second top seat (37) at the other end of the rotating rod (7) and the end of the first top seat (34).

7. A high-precision five-axis gantry machining center for automobile parts processing according to claim 6, characterized in that: A slide groove (30) is provided on both sides of the receiving hopper (8), the top frame (38) is fitted inside the slide groove (30), a guide seat (39) is fixedly installed above the side slide groove (30) of the receiving hopper (8), a locking ear (5) is fixedly installed at the upper corner of the L-shaped cover (33), a locking seat (36) is fitted at the lower end of the locking ear (5), and the end of the locking seat (36) is connected to the receiving hopper. (8) are fixed to each other, a prism (40) is installed in a fit and penetrated manner inside the guide seat (39), a locking groove seat (42) is fixedly installed at one end of the prism (40), the locking groove seat (42) is fitted to the outer side of the locking ear (5) and the locking seat (36), a spring body (41) is wound around the outer side of the prism (40), and the two ends of the spring body (41) are respectively fixed to the guide seat (39) and the locking groove seat (42).

8. The high-precision five-axis gantry machining center for automobile parts processing according to claim 7, characterized in that: A vertical plate (24) is arranged at the front lower part of the bearing seat (18), the lower end of the vertical plate (24) is fixed to the platform (1), the front end of the vertical plate (24) is penetrated by two No. 1 connecting shafts (23) for rotational installation, one end of the two No. 1 connecting shafts (23) is connected with a synchronous belt (15), the other end of the transmission shaft (26) and the other end of one of the No. 1 connecting shafts (23) are coaxially inlaid with a bevel gear (22), the two bevel gears (22) are meshed, and the upper end of the vertical plate (24) is penetrated by a bevel gear (22) for rotational installation A No. 2 connecting shaft (25), one end of which is coaxially inlaid with a No. 2 large gear (20), the other end of the other No. 1 connecting shaft (23) is coaxially inlaid with a No. 2 small gear (21), the No. 2 small gear (21) is meshed with the No. 2 large gear (20), the other end of the No. 2 connecting shaft (25) is coaxially inlaid with a No. 1 small gear (19), the outer surface of the threaded rod (10) near the end is coaxially inlaid with a No. 1 large gear (9), the No. 1 large gear (9) is meshed with the No. 1 small gear (19).

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