Machining lathe with waste recovery function

Abstract

The utility model relates to the technical field of machining lathes, and provides a machining lathe with a waste recovery function. The support is fixedly installed on the side, away from the center, of the upper surface of the workbench, and a collecting hopper is formed in the lower surface of the workbench. When the waste recycling device is used, the first motor is started to drive the first transmission shaft to rotate, the first transmission shaft drives the first belt wheel to rotate, and the first belt wheel drives the second belt wheel and the third belt wheel to rotate through the first belt. If the waste materials are composed of wood and iron materials, the magnetism of the magnetic table is started, the iron waste materials are attracted to the surface of the magnetic table, the wood waste materials enter the recycling box through vibration of the magnetic table, the iron waste materials enter the recycling box in a centralized mode after the machining lathe stops working, the recycling box is replaced, the magnetic table is closed, and the purpose of classified and centralized treatment of the wood waste materials and the iron waste materials is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of processing lathes, in particular to a processing lathe with a waste recycling function. Background Art

[0002] A lathe is a machine tool used to process a workpiece. The workpiece is fixed on a chuck of a rotating spindle, and then a tool is used to cut the workpiece to cut out various shapes, such as cylindrical, conical, drilling, threading, end surface processing, etc. When processing wooden strips, a lathe is also required to perform mechanical cutting on the surface.

[0003] The cam is fixed on the upper end of the sliding base, and the cam is fixed on the upper end of the sliding base with a plurality of movable lids, the movable lid being fixed on the lower end of the sliding base and the movable lid being fixed on the lower end of the sliding base.

[0004] However, during the implementation of the above technical solution, at least the following technical problems were found:

[0005] Lack of functions and poor waste handling: During the operation of the processing lathe, waste will continue to be generated, and the materials of these wastes will also be different. In order to facilitate subsequent processing, it should be possible to classify and collect and process the waste in a centralized manner. However, the above technical solution does not reflect the ability to achieve this function. In addition, in order to save the physical strength of the staff and speed up the work progress, automatic feeding can be completed by combining the motor with the mechanical structure, and in order to increase stability, the material can be clamped by the fixture. For this reason, we propose a processing lathe with a waste recycling function. Utility Model Content

[0006] The purpose of the utility model is to solve the problems in the prior art that waste materials of different materials generated by a processing lathe during processing cannot be classified, collected and processed, and that the material cannot be fixed and automatically fed for cutting during wood cutting.

[0007] The cam is fixedly mounted on a workbench, and a bottom surface of the workbench is provided with a collecting bucket, and a collecting box is installed on the bottom surface of the workbench, and a collecting box is installed on the bottom surface of the workbench.

[0008] As a preferred embodiment, one side of the outer surface of the pulley is rotatably connected to a circular shaft one, one side of the outer surface of the circular shaft one is fixedly installed with an L-shaped frame, the outer surface of the L-shaped frame is fixed to one side of the outer surface of the workbench, and the other side of the outer surface of the pulley is fixed with a connecting rod, the outer surface of the connecting rod is sleeved with a supporting sleeve two, the outer surface of the supporting sleeve two is fixed with a fixing block two, and one end of the outer surface of the fixing block two is fixed to the outer surface of the workbench.

[0009] The technical effect of adopting the above further solution is: the L-shaped frame makes the structure stable, and the pulley four drives the connecting rod to rotate.

[0010] As a preferred embodiment, an eccentric wheel is fixedly installed on the outer surface of the connecting rod away from the pulley four, a rocker is fixed on one side of the outer surface of the eccentric wheel, a movable rod is sleeved on the outer surface of the rocker, and the other ends of the outer surfaces of the movable rods are fixedly connected to plug one, and the outer surface of the plug one is rotatably connected to a fixed block three.

[0011] The technical effect of adopting the above further solution is that the movable rod vibrates back and forth through the rotation of the eccentric wheel and the storage and rotation connection of the movable rod, the eccentric wheel and the fixed block.

[0012] As a preferred embodiment, three outer surfaces of the fixed block are fixedly connected to a magnetic table, and baffles are fixed on both sides of the upper surface of the magnetic table.

[0013] The technical effect of adopting the above further solution is: by vibrating back and forth and turning on and off the magnetism of the magnetic table, iron and wood waste can be classified and screened, and the baffle can prevent the waste from splashing out of the magnetic table.

[0014] As a preferred embodiment, fixed blocks five are fixedly installed on both sides of the outer surface of the magnetic table near the top, a spring is fixedly installed on the upper surface of the fixed block five, a fixed block four is fixedly installed on the upper surface of the spring, and the upper surface of the fixed block four is fixed to the lower surface of the workbench.

[0015] The technical effect of adopting the above further solution is: the fixing block four and the fixing block five are combined with the spring to fix the magnetic table, and the spring can make the magnetic table vibrate back and forth.

[0016] As a preferred embodiment, a second plug is fixedly installed on both sides of the outer surface of the magnetic table near the bottom, and a fixing rod is rotatably connected to the outer surface of the second plug. A recycling box is provided under the magnetic table.

[0017] The technical effect of adopting the above further solution is that: while the magnetic table is fixed, the rotating connection makes the magnetic table movable and the recycling box collects waste in a centralized manner.

[0018] As a preferred embodiment, two rows of circular shafts 2 are fixed on the upper surface of the workbench, and pulleys are rotatably sleeved on the outer surfaces of the circular shafts 2.

[0019] The technical effect of adopting the above further solution is that when pushing the wood, the friction between the wood and the workbench can be reduced, saving time and effort.

[0020] As a preferred embodiment, a fixed block six is fixedly installed on one side of the outer surface of the workbench, a square block and motor two are fixedly installed on the upper surface of the fixed block six, a transmission shaft three is rotatably connected to the upper surface of the motor two, and a gear is fixed on the upper surface of the transmission shaft three.

[0021] The technical effect of adopting the above further solution is: the material pushing is automatically completed by engaging the gear and the rack with each other in combination with the second motor.

[0022] As a preferred embodiment, a rack is slidably embedded inside the square block, a limiting block 1 is fixed at one end of the outer surface of the rack, a clamping block is fixed at the other end of the outer surface of the rack, a threaded rod is threadedly connected to the upper surface of the clamping block, a limiting block 2 is fixed on the upper surface of the threaded rod, a fixed plate is fixed on the lower surface of the threaded rod, a sliding rod is fixed on the upper surface of the fixed plate, and the outer surface of the sliding rod is slidably embedded inside the clamping block.

[0023] The technical effect of adopting the above further solution is: the fixed plate is restricted to move up and down by the sliding rod, the threaded rod is rotated downward, combined with the fixed plate to clamp the wood, and the limit block 1 can prevent the threaded rod from detaching.

[0024] Compared with the prior art, the advantages and positive effects of the present invention are:

[0025] 1. When the utility model is used, the starting motor drives the transmission shaft to rotate, the transmission shaft drives the pulley to rotate, the pulley drives the pulley 2 and the pulley 3 through the belt 1, the pulley 3 drives the pulley 4 through the belt 2, the pulley 4 drives the eccentric wheel to rotate through the connecting rod, the movable rod is rotatably connected with the rocker and the fixed block 3, the two sides of the magnetic table are fixedly installed with fixed blocks 5 near the top, the upper surface of the fixed block 5 is fixed with a spring, the upper surface of the spring is fixed with a fixed block 4, the upper surface of the fixed block 4 is fixed to the lower surface of the workbench, and the outer surface of the magnetic table is close to the workbench. Two plugs are fixedly installed on both sides near the bottom, and the two plugs are rotatably connected to a fixed rod. A recycling box is set at the bottom of the magnetic table. During the operation of the processing lathe, if the waste material is of a single material, the magnetism of the magnetic table is turned off, and the waste material is vibrated into the recycling box for centralized processing. If the waste material is composed of wood and iron, the magnetism of the magnetic table is turned on to make the iron waste stick to the surface of the magnetic table, and the wood waste enters the recycling box through the vibration of the magnetic table. When the processing lathe stops working, the recycling box is replaced, and the magnetic table is turned off to make the iron waste enter the recycling box, so as to achieve the purpose of classified and centralized processing of wood waste and iron waste.

[0026] 2. According to the utility model, when it is necessary to process wood, one end of the wood is placed in the clamping block, and the threaded rod is rotated until the fixed plate contacts the surface of the wood and is clamped. The sliding rod serves to limit the fixed plate to move only up and down. The limit block 1 prevents the threaded rod from detaching, and then the motor 2 is started to make the transmission shaft 3 drive the gear to rotate. The gear and the rack are engaged with each other. The limit block 2 is fixed to one end of the rack to prevent the rack from detaching from the square block. By starting the motor 2 to drive the gear and the rack, the wood cutting is automatically completed. Two rows of circular shafts 2 are fixed on the upper surface of the workbench, and the outer surface of the circular shaft 2 is provided with a pulley to reduce the friction between the wood and the workbench, making feeding more time-saving and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the top view of a processing lathe with a waste recycling function provided by the utility model;

[0028] Figure 2 This is a front view structural diagram of a processing lathe with a waste recycling function provided by the utility model;

[0029] Figure 3 This is a bottom-up structural diagram of a processing lathe with a waste recycling function provided by the utility model;

[0030] Figure 4 This is a right side structural schematic diagram of a processing lathe with a waste recycling function provided by the utility model;

[0031] Figure 5 This is a partially enlarged schematic diagram of position A of a processing lathe with a waste recycling function provided by the utility model.

[0032] Legend:

[0033] 1. Workbench; 2. Bracket; 3. Motor 1; 4. Support Sleeve 1; 5. Dust Cover; 6. Blade; 7. Drive Shaft 1; 8. Pulley 1; 9. Belt 1; 10. Drive Shaft 2; 11. Pulley 2; 12. Pulley 3; 13. Belt 2; 14. Fixing Block 1; 15. Pulley 4; 16. Circular Shaft 1; 17. Connecting Rod; 18. Support Sleeve 2; 19. Fixing Block 2; 20. Eccentric; 21. Rocker; 22. Movable Rod; 23. Fixing Block 3; 24. Bolt 1 ; 25. Fixed block four; 26. Spring; 27. Fixed block five; 28. Magnetic table; 29. Fixed rod; 30. Plug two; 31. Collecting bucket; 32. Recycling box; 33. Round shaft two; 34. Pulley; 35. Fixed block six; 36. Square block; 37. Motor two; 38. Transmission shaft three; 39. Gear; 40. Rack; 41. Limit block one; 42. Clamping block; 43. Threaded rod; 44. Limit block two; 45. Fixed plate; 46. Sliding rod; 47. L-shaped frame; 48. Baffle. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0035] See also Figure 1 The utility model provides a technical solution: a processing lathe with a waste recycling function, comprising: a workbench 1; a bracket 2, which is fixedly mounted on the upper surface of the workbench 1 away from the center, and a collecting bucket 31 is opened on the lower surface of the workbench 1, a motor 3 is fixedly mounted on one side of the outer surface of the bracket 2, a fixing block 14 is fixed on one side of the outer surface of the bracket 2, a supporting sleeve 4 is fixed on one end of the outer surface of the fixing block 14, a dust cover 5 is fixed on one end of the outer surface of the supporting sleeve 4, a transmission shaft 2 10 is embedded in the interior of the supporting sleeve 4, and a blade 6 is fixedly mounted on one end of the outer surface of the transmission shaft 2 10; wherein, one end of the outer surface of the transmission shaft 2 10 is rotatably connected to a pulley 2 11, the outer surface of the motor 13 is rotatably connected to a transmission shaft 7, the outer surface of the transmission shaft 7 is rotatably connected to a pulley 8 away from the motor 3, the outer surfaces of the pulley 8 and the pulley 2 11 are sleeved with a belt 9, one side of the outer surface of the pulley 2 11 is fixedly mounted with a pulley 3 12, and the inner surface of the belt 2 13 is sleeved with a pulley 4 15.

[0036] like Figure 4As shown, one side of the outer surface of the pulley four 15 is rotatably connected to the circular shaft 16, and one side of the outer surface of the circular shaft 16 is fixedly installed with an L-shaped frame 47. The outer surface of the L-shaped frame 47 is fixed to one side of the outer surface of the workbench 1, and the other side of the outer surface of the pulley four 15 is fixedly installed with a connecting rod 17. The L-shaped frame 47 makes the structure stable, and the pulley four 15 drives the connecting rod 17 to rotate. The outer surface of the connecting rod 17 is sleeved with a supporting sleeve 2 18, and the outer surface of the supporting sleeve 2 18 is fixed with a fixing block 2 19. One end of the outer surface of the fixing block 2 19 is fixed to the outer surface of the workbench 1.

[0037] like Figure 5 As shown, an eccentric wheel 20 is fixedly mounted on one end of the outer surface of the connecting rod 17 away from the pulley four 15, a rocker 21 is fixed to one side of the outer surface of the eccentric wheel 20, a movable rod 22 is sleeved on the outer surface of the rocker 21, and a plug 1 24 is fixedly connected to the other end of the outer surface of the movable rod 22 on both sides, and a fixed block three 23 is rotatably connected to the outer surface of the plug 1 24. The movable rod 22 vibrates back and forth through the rotation of the eccentric wheel 20 and the rotational connection between the movable rod 22, the eccentric wheel 20 and the fixed block three 23.

[0038] like Figure 3 As shown, the outer surface of the fixed block three 23 is fixedly connected to the magnetic table 28, and baffles 48 are fixed on both sides of the upper surface of the magnetic table 28. By vibrating back and forth and opening and closing the magnetism of the magnetic table 28, iron and wood waste are classified and screened, and the baffles 48 can prevent the waste from splashing out of the magnetic table 28.

[0039] like Figure 3 As shown, fixed blocks five 27 are fixedly installed on both sides of the outer surface of the magnetic table 28 near the top, a spring 26 is fixedly installed on the upper surface of the fixed block five 27, and a fixed block four 25 is fixedly installed on the upper surface of the spring 26. The upper surface of the fixed block four 25 is fixed to the lower surface of the workbench 1. The magnetic table 28 is fixed by the fixed block four 25 and the fixed block five 27 in combination with the spring, and the spring 26 can make the magnetic table 28 vibrate back and forth.

[0040] like Figure 2 As shown, a second plug 30 is fixedly installed on the outer surface of the magnetic table 28 near both sides of the bottom, and a fixing rod 29 is rotatably connected to the outer surface of the second plug 30. A recycling box 32 is provided under the magnetic table 28. While fixing the magnetic table 28, the rotating connection method makes the magnetic table 28 movable, and the recycling box 32 collects waste in a centralized manner.

[0041] like Figure 1 As shown, two rows of circular shafts 33 are fixed on the upper surface of the workbench 1, and pulleys 31 are rotatably sleeved on the outer surface of the circular shafts 33. When pushing wood, the friction between the wood and the workbench 1 can be reduced, saving time and effort.

[0042] like Figure 2As shown, a fixed block six is fixedly installed on one side of the outer surface of the workbench, a square block and motor two are fixedly installed on the upper surface of the fixed block six, a transmission shaft three is rotatably connected to the upper surface of motor two, a gear is fixed on the upper surface of transmission shaft three, and the gear and rack are engaged with each other, combined with motor two, to automatically complete the pushing of materials.

[0043] like Figure 2 As shown, a rack 40 is slidably embedded in the square block 36, and a limit block 41 is fixed to one end of the outer surface of the rack 40, and a clamping block 42 is fixed to the other end of the outer surface of the rack 40. A threaded rod 43 is threadedly connected to the upper surface of the clamping block 42, and a limit block 2 44 is fixed to the upper surface of the threaded rod 43. A fixing plate 45 is fixed to the lower surface of the threaded rod 43, and a sliding rod 46 is fixed to the upper surface of the fixing plate 45. The outer surface of the sliding rod 46 is slidably embedded in the clamping block 42, and the fixing plate 45 is limited to moving up and down by the sliding rod 46. By rotating the threaded rod 43 downward, the wood is clamped in combination with the fixing plate 45, and the limit block 41 can prevent the threaded rod 43 from detaching.

[0044] Working principle: When in use, start the motor 13 fixed on one side of the outer surface of the bracket 2 to drive the transmission shaft 17 to rotate, the transmission shaft 17 drives the pulley 18 to rotate, the pulley 18 drives the pulley 2 11, the pulley 3 12, and the transmission shaft 2 10 to rotate through the belt 19, a blade 6 is fixed to one end of the outer surface of the transmission shaft 2 10, a support sleeve 14 is provided on the outer surface of the transmission shaft 2 10, a fixed block 14 is fixed to the outer surface of the support sleeve 4, the outer surface of the fixed block 14 is fixed to one side of the outer surface of the bracket 2, a dust cover 5 is fixed to one end of the outer surface of the support sleeve 4, the pulley 3 12 drives the pulley 4 15 to rotate through the belt 2 13, one side of the outer surface of the pulley 4 15 is connected to the circular shaft 16, and the other side of the outer surface of the circular shaft 16 is connected to the L-shaped Frame 47, pulley four 15 drives the eccentric wheel 20 to rotate through the connecting rod 17, the outer surface of the connecting rod 17 is provided with a supporting sleeve two 18, the outer surface of the supporting sleeve two 18 is fixed with a fixed block two 19, the outer surface of the fixed block two is fixed with the workbench 1, the outer surface of the movable rod 22 is fixed with a plug one 24, the outer surface of the plug one 24 is rotatably connected with the fixed block three 23, the outer surface of the rocker 21 is rotatably connected with the movable rod 22, the outer surface of the magnetic table 28 is fixedly installed with fixed blocks five 27 near the top on both sides, the upper surface of the fixed block five 27 is fixed with a spring 26, the upper surface of the spring 26 is fixed with a fixed block four 25, the upper surface of the fixed block four 25 is fixed to the lower surface of the workbench 1, the lower surface of the workbench 1 is fixedly installed with a collecting bucket 31, and the outer surface of the magnetic table 28 is fixedly installed on both sides near the bottom There is a second plug 30, the outer surface of the second plug 30 is rotatably connected to a fixed rod 29, the upper surface of the fixed rod 29 is fixed to the lower surface of the workbench 1, a recycling box 32 is provided under the magnetic table 28, and baffles 48 are fixedly installed on both sides of the upper surface of the magnetic table 28. During the operation of the processing lathe, if the waste material is a single material, the magnetism of the magnetic table 28 is turned off, and the waste material is vibrated into the recycling box 32 for centralized processing. If the waste material is composed of wood and iron materials, the magnetism of the magnetic table 28 is turned on, so that the iron waste is adsorbed on the surface of the magnetic table 28, and the wood waste is vibrated into the recycling box 32 through the magnetic table 28. When the processing lathe stops working, the recycling box 32 is replaced, and the magnetism of the magnetic table 28 is turned off, so that the iron waste is concentrated into the recycling box 32, so as to achieve the purpose of classified centralized processing of wood waste and iron waste. When the wood is cut, one end of the wood is placed in the clamping block 42, and the threaded rod 43 is rotated until the fixed plate 45 contacts the wood surface and is clamped. The sliding rod 46 limits the fixed plate 45 to move only up and down. The limit block 2 44 prevents the threaded rod 43 from escaping. The upper surface of the fixed block 6 35 is fixed with a motor 2 37. When the motor 2 37 is started, the transmission shaft 38 drives the gear 39 to rotate. The gear 39 and the rack 40 are meshed with each other. The limit block 1 41 is fixed to one end of the rack 40 to prevent the rack 40 from escaping from the square block 36. By starting the motor 2 37 to drive the gear 39 and the rack 40, the wood cutting is automatically completed. Two rows of circular shafts 2 33 are fixed on the upper surface of the workbench 1. The outer surface of the circular shaft 2 33 is provided with a pulley 34 to reduce the friction between the wood and the workbench 1.Make feeding more time-saving and labor-saving.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A processing lathe with waste recycling function, characterized in that: include: Workbench (1); The bracket (2) is fixedly mounted on a side of the workbench (1) away from the center, a collecting bucket (31) is fixedly mounted on the lower surface of the workbench (1), a motor (3) is fixedly mounted on one side of the outer surface of the bracket (2), a fixing block (14) is fixed on one side of the outer surface of the bracket (2), a supporting sleeve (4) is fixed on one end of the outer surface of the fixing block (14), a dust cover (5) is fixed on one end of the outer surface of the supporting sleeve (4), a transmission shaft (10) is embedded in the interior of the supporting sleeve (4), and a blade (6) is fixedly mounted on one end of the outer surface of the transmission shaft (10); Among them, one end of the outer surface of the transmission shaft 2 (10) is rotatably connected to the pulley 2 (11), the outer surface of the motor 1 (3) is rotatably connected to the transmission shaft 1 (7), the outer surface of the transmission shaft 1 (7) away from the motor 1 (3) is rotatably connected to the pulley 1 (8), the outer surfaces of the pulley 1 (8) and the pulley 2 (11) are sleeved with the belt 1 (9), one side of the outer surface of the pulley 2 (11) is fixedly installed with the pulley 3 (12), and the inner part of the belt 2 (13) is sleeved with the pulley 4 (15).

2. The processing lathe with waste recycling function according to claim 1, characterized in that: One side of the outer surface of the pulley four (15) is rotatably connected to a circular shaft one (16), one side of the outer surface of the circular shaft one (16) is fixedly installed with an L-shaped frame (47), the outer surface of the L-shaped frame (47) is fixed to one side of the outer surface of the workbench (1), and the other side of the outer surface of the pulley four (15) is fixedly installed with a connecting rod (17), the outer surface of the connecting rod (17) is sleeved with a supporting sleeve two (18), the outer surface of the supporting sleeve two (18) is fixed with a fixing block two (19), and one end of the outer surface of the fixing block two (19) is fixed to the outer surface of the workbench (1).

3. The processing lathe with waste recycling function according to claim 2, characterized in that: An eccentric wheel (20) is fixedly mounted on one end of the outer surface of the connecting rod (17) away from the pulley four (15), a rocker (21) is fixed on one side of the outer surface of the eccentric wheel (20), a movable rod (22) is sleeved on the outer surface of the rocker (21), and a plug one (24) is fixedly connected to the other end of the outer surface of both sides of the movable rod (22), and the outer surface of the plug one (24) is rotatably connected to a fixed block three (23).

4. The processing lathe with waste recycling function according to claim 3, characterized in that: The outer surface of the fixed block three (23) is fixedly connected to a magnetic platform (28), and baffles (48) are fixed on both sides of the upper surface of the magnetic platform (28).

5. The processing lathe with waste recycling function according to claim 4, characterized in that: Fixed blocks five (27) are fixedly installed on both sides of the outer surface of the magnetic table (28) near the top, a spring (26) is fixedly installed on the upper surface of the fixed block five (27), a fixed block four (25) is fixedly installed on the upper surface of the spring (26), and the upper surface of the fixed block four (25) is fixed to the lower surface of the workbench (1).

6. The processing lathe with waste recycling function according to claim 5, characterized in that: The outer surface of the magnetic platform (28) is fixedly mounted with a second plug (30) near both sides of the bottom, and the outer surface of the second plug (30) is rotatably connected to a fixing rod (29). A recovery box (32) is provided below the magnetic platform (28).

7. The processing lathe with waste recycling function according to claim 6, characterized in that: Two rows of circular shafts (33) are fixed on the upper surface of the workbench (1), and pulleys (34) are rotatably sleeved on the outer surfaces of the circular shafts (33).

8. The processing lathe with waste recycling function according to claim 7, characterized in that: A fixing block six (35) is fixedly installed on one side of the outer surface of the workbench (1), a square block (36) and a second motor (37) are fixedly installed on the upper surface of the fixing block six (35), a transmission shaft three (38) is rotatably connected to the upper surface of the second motor (37), and a gear (39) is fixed on the upper surface of the transmission shaft three (38).

9. The processing lathe with waste recycling function according to claim 8, characterized in that: A rack (40) is slidably embedded in the interior of the square block (36); a limiting block (41) is fixed to one end of the outer surface of the rack (40); a clamping block (42) is fixed to the other end of the outer surface of the rack (40); a threaded rod (43) is threadedly connected to the upper surface of the clamping block (42); a limiting block (44) is fixed to the upper surface of the threaded rod (43); a fixing plate (45) is fixed to the lower surface of the threaded rod (43); a sliding rod (46) is fixed to the upper surface of the fixing plate (45); and the outer surface of the sliding rod (46) is slidably embedded in the interior of the clamping block (42).

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