Assembling device for garbage can production and manufacturing

Abstract

The invention belongs to the technical field of garbage can production, and discloses an assembling device for garbage can production and manufacturing, which comprises a base. Through cooperation of structures such as the first sequencing assembly and the second sequencing assembly, a reversing disc drives all wheels to enter a reversing pipe through a first guide pipe in sequence, an air pump fixes the wheels through negative pressure and pulls the wheels out of a first storage box, and the wheels are separated from a lead screw motor and roll down through a second guide pipe; the limiting assembly intercepts the wheel close to one side of the garbage can, so that when the extrusion assembly drives the garbage can to move, the wheel cannot be knocked off, a rotating shaft and a limiting groove transport the rotating shaft into a guide pipe in rotation of a third motor, the extrusion assembly drives the garbage can to move, and finally the limiting assembly is driven not to stop the wheel on a second guide pipe any more. The two wheels are pressed to be in butt joint with the rotating shaft, deviation caused by manual installation is further avoided, the situation that the rotating shaft and the wheels are damaged is avoided, and meanwhile the manual labor cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of garbage can production, and in particular is an assembly device used for producing garbage cans. Background Art

[0002] As one of the most common items on the streets, sanitation trash cans are mainly made of plastic, and they can also reduce the littering of garbage on the streets. The wheels and barrels of common green sanitation trash cans on the market are generally manufactured separately, and the user will eventually manually install the shaft at the bottom. The wheels of the trash cans will be directly installed into the two ends of the shaft by hammering. However, during the installation process, the hammering force is not fixed, and the installation efficiency may vary due to the large or small manual force, or the angle of the hammering may lead to installation deviations and even eventually cause the wheels or shafts to be damaged by hammering. For this reason, we provide an assembly device for the production of trash cans. Summary of the invention

[0003] In order to solve the problems raised in the above-mentioned background technology, the present invention provides an assembly device for the production of garbage cans, which solves the problem that the shafts and wheels of existing sanitation garbage cans are installed manually, but the strength and angle of the hammering wheels during manual installation are different, which may cause the shafts and wheels to be damaged.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an assembly device for manufacturing a trash can, comprising a base, and further comprising; A sorting component 2 disposed on the top of the base; The sorting component 2 includes a storage box 2 fixedly mounted on the top of the base, a motor 3 fixedly mounted on the side of the storage box 2, an output shaft of the motor 3 is connected to a central shaft in a transmission manner, the central shaft is located inside the storage box 2 and has a plurality of limit grooves formed at equal angles around the outer circumference, a guide tube fixedly mounted on the side of the storage box 2, and a rotating shaft is placed inside the storage box 2; The assembly device for manufacturing trash cans also includes: a sorting assembly 1 fixedly mounted on the top of the storage box 2; The sorting component 1 includes a storage box 1 fixedly mounted on the top of the storage box 2, the interior of the storage box 1 is connected to a reversing disk through a motor 1, the inner wall of the storage box 1 is provided with two guide tubes 1 at equal angles in a circumferential direction, the storage box 1 is provided with two direction-changing tubes respectively connected to the guide tubes 1, the upper and lower ends of both sides of each direction-changing tube are respectively hinged with a baffle, each of the baffles is elastically connected to the direction-changing tube through a spring sheet, a wheel is placed inside each of the direction-changing tubes, a screw motor is respectively provided on the outside of the storage box 1, the output end of the screw motor is connected to an air pump through a transmission, and the outside of the direction-changing tube is connected to the guide tube 2; The assembly device for manufacturing a trash can further includes: an extrusion assembly movably arranged on the top of the base, and the trash can is arranged on the extrusion assembly; The limit assembly is arranged on the guide pipe 2 near the side of the trash can. The squeezing assembly is used to force the trash can to move and drive the limiting assembly to no longer block the wheels.

[0005] Preferably, the inner diameter of the limiting groove matches the outer diameter of the rotating shaft, the outer periphery of the middle rotating shaft is made of rubber, a groove for placing the rotating shaft is provided inside the guide tube, the end of the guide tube is made of rubber, and the inner wall of the storage box 2 is inclined.

[0006] Preferably, a plurality of rubber strips are arranged at equal angles around the outer circumference of the reversing plate, the guide tube 1 is in a spiral ascending shape as a whole, the bottom of the guide tube 1 is attached to the bottom surface of the storage box 1, and a groove for placing the wheel bearing race is arranged in the middle of the guide tube 1.

[0007] Preferably, the bearing race of the wheel is protruding, the length of the air pump air inlet pipe is smaller than the length of the wheel bearing race, and the second guide pipe is made of rubber.

[0008] Preferably, the limiting assembly includes a spring telescopic rod hinged to the side of the guide tube 2 close to the side of the trash can, the side of the spring telescopic rod is hinged with a guide rod, and the top of the spring telescopic rod is fixed with a stop rod running through the bottom of the guide tube 2.

[0009] Preferably, the extrusion assembly includes a hydraulic cylinder fixed to the bottom of the base, the output end of the hydraulic cylinder movably passes through the top of the base and is elastically connected to a supporting plate through a spring, a pressure shaft for fixing the trash can is provided on the top of the supporting plate, and a spring telescopic plate is fixed on the top of the supporting plate.

[0010] Preferably, the extrusion assembly further comprises a guide block and a pressure plate fixedly mounted on the outer side of the hydraulic cylinder, and the guide block is inclined at a side away from the spring telescopic rod.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The present invention cooperates with the structures of sorting component 1 and sorting component 2. The reversing plate drives each wheel to enter the interior of the change-of-direction tube through guide tube 1 in turn. The air pump fixes the wheel through negative pressure and pulls it out of the interior of storage box 1. The wheel detaches from the screw motor and rolls down through guide tube 2. The wheel on the other side is in the same state. The limiting component intercepts the wheel close to the side of the trash can so that the wheel will not be knocked off when the extrusion component drives the trash can to move. The motor 3 rotates the rotating shaft and the limiting groove to transport the rotating shaft to the inside of the guide tube. The extrusion component drives the trash can to move and forces the rotating shaft to enter the installation position of the trash can. Finally, the driving limiting component no longer blocks the wheel on guide tube 2 and forces the two wheels to dock on the rotating shaft, further avoiding deviation in manual installation and damage to the rotating shaft and wheels, while reducing the cost of manual labor.

[0012] The present invention cooperates with the structures such as the sorting component 1 and the wheel. When the air pump drives the screw motor to move, if the bearing race of the wheel is aligned with the suction end of the air pump, the air pump will push the bearing race of the wheel and force it to be located on the baffle inside the squeezing storage box 1. Finally, the center of the wheel will fall inside the storage box 1. In the sorting component 1, except for the guide tube 1, the storage box 1, the motor 1 and the reversing plate, the structures are all symmetrically installed. This operation can make the bearing races of the two wheels correspond to each other. After reaching the specified position through the guide tube 2, they can also be smoothly docked with the rotating shaft, which further improves the accuracy of the device in assembling the wheels and the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the appearance structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the storage box 2 of the present invention; Figure 3 This is a schematic diagram of the coordination structure of the sorting component 1 and the limiting component of the present invention; Figure 4 This is a top view of the trash can and the rotating shaft of the present invention; Figure 5 Schematic diagram of the position of the trash can and the guide pipe of the present invention Figure 6 This is a schematic diagram of the internal structure of the storage box of the present invention; Figure 7 This is a schematic diagram of the structural coordination between the storage box 1 and the guide tube 1 of the present invention; Figure 8 This is a schematic diagram of the coordination between the air pump and the wheel structure of the present invention; Fig. 9 It is a schematic diagram of the structural coordination between the storage box 1 and the guide tube 2 of the present invention.

[0014] In the figure: 1. base; 2. sorting component 1; 21. storage box 1; 22. reversing plate; 23. change-direction tube; 24. guide tube 1; 25. guide tube 2; 26. baffle; 27. spring sheet; 28. screw motor; 29. ​​air pump; 20. motor 1; 3. sorting component 2; 31. storage box 2; 32. motor 3; 33. transfer shaft; 34. limiting groove; 35. guide tube; 4. limiting component; 41. spring telescopic rod; 42. guide rod; 43. gear lever; 5. extrusion component; 51. hydraulic cylinder; 52. bearing plate; 53. pressure shaft; 54. spring telescopic plate; 55. guide block; 56. pressure plate; 57. spring; 6. trash can; 7. wheel; 8. rotating shaft. DETAILED DESCRIPTION

[0015] 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 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.

[0016] like Figures 1 to 8 As shown, the present invention provides an assembly device for manufacturing a trash can, comprising a base 1, and further comprising; A sorting component 2 3 disposed on the top of the base 1; The sorting component 2 3 includes a storage box 2 31 fixedly mounted on the top of the base 1, a motor 32 fixedly mounted on the side of the storage box 2 31, an output shaft of the motor 32 is drivingly connected to a rotating shaft 33, the rotating shaft 33 is located inside the storage box 2 31 and has a plurality of limit grooves 34 formed at equal angles around the outer periphery, a guide tube 35 fixedly mounted on the side of the storage box 2 31, and a rotating shaft 8 is placed inside the storage box 2 31; The assembly device for manufacturing the trash can also includes: a sorting assembly 2 fixedly mounted on the top of the storage box 31; The sorting component 12 comprises a storage box 121 fixedly mounted on the top of the storage box 231, the interior of the storage box 121 is connected to a reversing disk 22 through a motor 120, the inner wall of the storage box 121 is provided with two guide tubes 124 at equal angles in a circumferential direction, the storage box 121 is provided with two direction-changing tubes 23 respectively connected to the guide tubes 124, the upper and lower ends of both sides of each direction-changing tube 23 are respectively hinged with a baffle 26, each baffle 26 is elastically connected to the direction-changing tube 23 through a spring sheet 27, each direction-changing tube 23 is provided with a wheel 7, the outer side of the storage box 121 is respectively provided with a lead screw motor 28, the output end of the lead screw motor 28 is connected to an air pump 29, and the outer side of the direction-changing tube 23 is connected to the guide tube 25; The assembly device for manufacturing a trash can further includes: an extrusion assembly 5 movably arranged on the top of the base 1, and a trash can 6 is arranged on the extrusion assembly 5; The limiting assembly 4 is arranged on the guide pipe 25 near the side of the trash can 6. The squeezing assembly 5 is used to force the trash can 6 to move and drive the limiting assembly 4 to no longer block the wheel 7.

[0017] The inner diameter of the limiting groove 34 matches the outer diameter of the rotating shaft 8. The outer periphery of the rotating shaft 33 is made of rubber. The interior of the guide tube 35 is provided with a groove for placing the rotating shaft 8. The end of the guide tube 35 is made of rubber. The inner wall of the storage box 2 31 is inclined.

[0018] The above scheme is adopted: the wheels 7 are first poured into the storage box 21, and then the reversing disc 22 is started by the motor 20, so that the wheels 7 on the top can surge inside the storage box 21. At the same time, it should be noted that the reversing disc 22 will also drive each wheel 7 to enter the guide tube 24 in turn, and the wheels 7 rise according to the trajectory of the guide tube 24 and enter the inside of the change-direction tube 23; The lead screw motor 28 drives the air pump 29 to move axially, and the air pump 29 can fix the position of the wheel 7 by negative pressure and pull it out of the storage box 1 21. At the same time, the wheel 7 will press the baffle 26 located outside the direction-changing tube 23 to tilt so that it will not block the movement of the wheel 7. When the air pump 29 returns to the initial position, due to the obstruction of the direction-changing tube 23, the wheel 7 will be separated from the lead screw motor 28 and roll down through the guide tube 2 25. The wheel 7 on the other side is in the same state. At this time, both wheels 7 fall into the designated position. It should be noted that the limiting assembly 4 will intercept the wheel 7 near the side of the trash can 6, so that when the extruding assembly 5 drives the trash can 6 to move, the wheel 7 will not be knocked off. At the same time, the motor 32 drives the central shaft 33 to rotate and rotates the shaft 8 inside the storage box 1 21 to the inside of the guide tube 35 through the limiting groove 34. Through the extrusion of several shafts 8, the first shaft 8 will be located in the groove inside the guide tube 35. The squeezing component 5 drives the trash can 6 to move and forces the rotating shaft 8 to enter the installation position of the trash can 6. One of the guide tubes 25 and the guide tube 35 is made of rubber, which allows the trash can 6 to return to its original state after passing through the guide tube 25 and the guide tube 35, and also does not delay the rotating shaft 8 from entering the installation position of the trash can 6. When the trash can 6 is no longer in contact with the guide tube 25, the squeezing component 5 no longer pushes the trash can 6, but instead drives the limiting component 4 to no longer block the wheel 7 on the guide tube 25, and forces the last wheel 7 to dock with the rotating shaft 8. Further, deviations in manual installation and damage to the rotating shaft 8 and the wheel 7 are avoided, while reducing the cost of manual labor.

[0019] like Figure 5 and Figure 6 As shown, a plurality of rubber strips are arranged at equal angles around the outer periphery of the reversing plate 22, and the guide tube 24 is in a spiral ascending shape as a whole, and the bottom of the guide tube 24 is attached to the bottom surface of the storage box 21, and a groove for placing the bearing race of the wheel 7 is arranged in the middle of the guide tube 24.

[0020] The bearing race of the wheel 7 is in a protruding shape, the length of the air inlet pipe of the air pump 29 is smaller than the length of the bearing race of the wheel 7, and the guide pipe 25 is made of rubber.

[0021] With the above solution, when the reversing disc 22 rotates, the rubber strip on it can better help the wheel 7 to roll over and enter the interior of the guide tube 24. The notch provided on the guide tube 24 can also prevent the bearing race from being damaged by long-term friction. When the air pump 29 drives the screw motor 28 to move, if the bearing race of the wheel 7 is aligned with the suction end of the air pump 29, the air pump 29 will push the bearing race of the wheel 7 and force it to be located inside the baffle 26 of the extruded storage box 21. Finally, the center of the wheel 7 will fall inside the storage box 21. In the sorting component 2, except for the guide tube 24, the storage box 21, the motor 20 and the reversing plate 22, the structures are all symmetrically installed. This operation can make the bearing races of the two wheels 7 correspond to each other. After reaching the specified position through the guide tube 25, they can also be smoothly docked with the rotating shaft 8, which further improves the accuracy of the device in assembling the wheels 7 and the rotating shaft 8.

[0022] like Figure 1 and Figure 8 As shown, the extrusion assembly 5 includes a hydraulic cylinder 51 fixed to the bottom of the base 1, the output end of the hydraulic cylinder 51 movably passes through the top of the base 1 and is elastically connected to a supporting plate 52 through a spring 57, a pressure shaft 53 for fixing the trash can 6 is provided on the top of the supporting plate 52, and a spring telescopic plate 54 is fixed on the top of the supporting plate 52.

[0023] The extrusion assembly 5 further includes a guide block 55 and a pressure plate 56 fixedly mounted on the outer side of the hydraulic cylinder 51 . The side of the guide block 55 away from the spring telescopic rod 41 is inclined.

[0024] The limiting assembly 4 includes a spring telescopic rod 41 hinged on the side of the guide tube 25 close to the trash can 6, the side of the spring telescopic rod 41 is hinged with a guide rod 42, and the top of the spring telescopic rod 41 is fixed with a stop rod 43 that runs through the bottom of the guide tube 25.

[0025] The above scheme is adopted: the hydraulic cylinder 51 drives the bearing plate 52 to move through the spring 57. At this time, the deflection tube 23 is located inside the trash can 6, and the bottom of the trash can 6 is supported and fixed by the spring telescopic plate 54. During the movement of the trash can 6, it will pass through the guide tube 25 and the guide tube 35 close to the side of the trash can 6 in sequence. Since both are made of rubber, and the wheel 7 on the guide tube 25 on this side is blocked by the limit assembly 4, the trash can 6 can smoothly pass through the guide tube 25 and contact the rotating shaft 8 on the guide tube 35. As the trash can 6 moves, the rotating shaft 8 can enter the installation position of the trash can 6. When the bearing plate 52 can no longer move, the movable end of the hydraulic cylinder 51 is held The spring 57 is continuously moved and compressed, and the movable end of the hydraulic cylinder 51 pushes the spring telescopic rod 41 through the guide block 55, so that it drives the gear rod 43 to descend through the guide rod 42. At this time, both wheels 7 are located at the specified position, and the hydraulic cylinder 51 continuously moves the pressure plate 56 to squeeze one of the wheels 7 to dock with one end of the rotating shaft 8, and finally the other end of the rotating shaft 8 docks with the other wheel 7 resting on the top of the base 1 again. Furthermore, the ends of the two guide tubes 35 and the guide tube 2 25 are open, so that after the wheels 7 and the rotating shaft 8 are installed on the trash can 6, it can be smoothly separated from the sorting component 1 2 and the sorting component 2 3, thereby not damaging the guide tube 2 25 and the guide tube 35.

[0026] The working principle and use process of the present invention: The wheels 7 are first poured into the storage box 21, and then the reversing disc 22 is started by the motor 20, so that the wheels 7 on the top can be turned over in the storage box 21. It should be noted that the reversing disc 22 also drives each wheel 7 to enter the guide tube 24 in turn, and the wheels 7 rise according to the trajectory of the guide tube 24 and enter the inside of the change-direction tube 23; The lead screw motor 28 drives the air pump 29 to move axially. The air pump 29 can fix the position of the wheel 7 by negative pressure and pull it out of the storage box 1 21. The air pump 29 returns to the initial position, and the wheel 7 is separated from the lead screw motor 28 and rolls down through the guide tube 2 25. The wheel 7 on the other side is in the same state. At this time, both wheels 7 fall into the designated position. The limiting component 4 will intercept the wheel 7 near the side of the trash can 6, so that when the squeezing component 5 drives the trash can 6 to move, the wheel 7 will not be knocked off. At the same time, the motor 32 drives the central shaft 33 to rotate and rotates the shaft 8 inside the storage box 1 21 to the inside of the guide tube 35 through the limiting groove 34. After the squeezing of several shafts 8, the first shaft 8 will be located in the groove inside the guide tube 35. The hydraulic cylinder 51 drives the bearing plate 52 to move through the spring 57. At this time, the deflection tube 23 is located inside the trash can 6, and the bottom of the trash can 6 is supported and fixed by the spring telescopic plate 54. During the movement of the trash can 6, it will pass through the guide tube 25 and the guide tube 35 close to the side of the trash can 6 in sequence. Since both are made of rubber, and the wheel 7 on the guide tube 25 on this side is blocked by the limit assembly 4, the trash can 6 can smoothly pass through the guide tube 25 and contact the rotating shaft 8 on the guide tube 35. As the trash can 6 moves, the rotating shaft 8 can enter the installation position of the trash can 6. When the bearing plate 52 cannot When moving again, the movable end of the hydraulic cylinder 51 continues to move and compresses the spring 57. The movable end of the hydraulic cylinder 51 pushes the spring telescopic rod 41 through the guide block 55, so that it drives the gear rod 43 to descend through the guide rod 42. At this time, the two wheels 7 are both at the specified position, and the hydraulic cylinder 51 continues to move the pressure plate 56 to squeeze one of the wheels 7 to dock with one end of the rotating shaft 8. Finally, the other end of the rotating shaft 8 docks with the other wheel 7 resting on the top of the base 1 again. The ends of the two guide tubes 35 and the guide tube 2 25 are open. After the garbage can 6 is installed, it can be smoothly separated from the sorting component 1 2 and the sorting component 2 3.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An assembly device for manufacturing a trash can, comprising a base (1), characterized in that: Also includes; A second sorting component (3) disposed on the top of the base (1); The sorting component 2 (3) comprises a storage box 2 (31) fixedly mounted on the top of the base (1); a motor 3 (32) is fixedly mounted on the side of the storage box 2 (31); the output shaft of the motor 3 (32) is drivingly connected to a central rotating shaft (33); the central rotating shaft (33) is located inside the storage box 2 (31) and has a plurality of limit grooves (34) formed on the outer circumference at equal angles; a guide tube (35) is fixedly mounted on the side of the storage box 2 (31); and a rotating shaft (8) is placed inside the storage box 2 (31); The assembly device further comprises a sorting assembly 1 (2) fixedly mounted on the top of the second storage box (31); The sorting component 1 (2) comprises a storage box 1 (21) fixedly mounted on the top of the storage box 2 (31); the interior of the storage box 1 (21) is connected to a reversing disk (22) through a motor 1 (20); the inner wall of the storage box 1 (21) is provided with two guide tubes 1 (24) at equal angles in a circumferential direction; the storage box 1 (21) is provided with two direction-changing tubes (23) respectively connected to the guide tubes 1 (24); the upper and lower ends of both sides of each direction-changing tube (23) are respectively hinged with a baffle (26); each baffle (26) is elastically connected to the direction-changing tube (23) through a spring sheet (27); a wheel (7) is placed inside each direction-changing tube (23); a screw motor (28) is respectively provided on the outer side of the storage box 1 (21); the output end of the screw motor (28) is connected to an air pump (29); the outer side of the direction-changing tube (23) is connected to the guide tube 2 (25); The assembling device further comprises an extrusion assembly (5) movably arranged on the top of the base (1), and a trash can (6) is arranged on the extrusion assembly (5); A limit assembly (4) provided on the second guide pipe (25) on the side close to the trash can (6) The squeezing assembly (5) is used to force the trash can (6) to move and drive the limiting assembly (4) to no longer block the wheel (7).

2. The assembly device for manufacturing trash cans according to claim 1, characterized in that: The inner diameter of the limiting groove (34) matches the outer diameter of the rotating shaft (8); the outer periphery of the middle rotating shaft (33) is made of rubber; a groove for placing the rotating shaft (8) is provided inside the guide tube (35); the end of the guide tube (35) is made of rubber; and the inner wall of the second storage box (31) is inclined.

3. The assembly device for manufacturing trash cans according to claim 1, characterized in that: The outer circumference of the reversing plate (22) is provided with a plurality of rubber strips at equal angles. The guide tube (24) is in a spiral ascending shape as a whole. The bottom of the guide tube (24) is in contact with the bottom surface of the storage box (21). The middle of the guide tube (24) is provided with a notch for accommodating the bearing race of the wheel (7).

4. The assembly device for manufacturing trash cans according to claim 3, characterized in that: The bearing race of the wheel (7) is in a protruding shape, the length of the air inlet pipe of the air pump (29) is smaller than the length of the bearing race of the wheel (7), and the second guide pipe (25) is made of rubber.

5. The assembly device for manufacturing trash cans according to claim 1, characterized in that: The limiting assembly (4) comprises a spring telescopic rod (41) hinged to the side of the second guide tube (25) near the side of the trash can (6), a guide rod (42) being hinged to the side of the spring telescopic rod (41), and a stop rod (43) penetrating the bottom of the second guide tube (25) being fixedly mounted on the top of the spring telescopic rod (41).

6. The assembly device for manufacturing trash cans according to claim 5, characterized in that: The extrusion assembly (5) comprises a hydraulic cylinder (51) fixedly mounted on the bottom of the base (1); the output end of the hydraulic cylinder (51) movably passes through the top of the base (1) and is elastically connected to a bearing plate (52) via a spring (57); a pressure shaft (53) for fixing the trash can (6) is arranged on the top of the bearing plate (52); and a spring telescopic plate (54) is fixedly mounted on the top of the bearing plate (52).

7. The assembly device for manufacturing trash cans according to claim 6, characterized in that: The extrusion assembly (5) further comprises a guide block (55) and a pressure plate (56) fixedly mounted on the outside of the hydraulic cylinder (51); the side of the guide block (55) away from the spring telescopic rod (41) is inclined.

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