Coaxial cable production winding device

Abstract

The utility model relates to the field of cable production, and discloses a coaxial cable production winding device which comprises a bottom plate and a winding wheel arranged above the bottom plate, a vertical plate is fixedly installed at the top of the bottom plate, a rotating shaft is rotatably installed on the front side wall of the vertical plate, and the rear end of the rotating shaft penetrates through the vertical plate; the rotating shaft is fixedly sleeved with a fixed dull polish disc located in front of the vertical plate, the winding wheel is slidably arranged on the rotating shaft in a sleeving mode and abuts against the fixed dull polish disc, the winding wheel is of an I-shaped structure, the rotating shaft is movably sleeved with a movable dull polish disc, and the movable dull polish disc abuts against the front side wall of the winding wheel. Compared with the prior art, the coaxial cable winding device has the following advantages and effects that in the process of winding a produced coaxial cable on the winding wheel, the coaxial cable can be neatly and orderly wound on the winding wheel through the traction mechanism, the winding quality is improved, the labor intensity of workers is reduced, and the safety performance during operation is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of cable production, and in particular to a coaxial cable production and winding device. Background Art

[0002] Coaxial cable is a kind of wire and signal transmission line, which is generally made of four layers of materials. The innermost is a conductive copper wire, surrounded by a layer of plastic outside the wire, and there is a thin mesh conductor outside the insulator, and then the outermost insulating material outside the conductor is used as the outer sheath. Coaxial cable can be used for the transmission of analog and digital signals and is suitable for a variety of applications. In the production process of coaxial cable, a winding device is needed to wind up the produced cable so that the coaxial cable can be packaged, sold and transported later. After searching, the patent with authorization announcement number CN220467148U announced a winding device for coaxial cable production, including a door-shaped fixed frame; a door-shaped trailer, which is installed on the door-shaped fixed frame by a lifting mechanism; two supporting blocks, a fixed block is fixedly provided on the left and right outer walls of the door-shaped trailer, each of the fixed blocks is slidably installed with a supporting block, and a locking pin is also installed between each supporting block and the corresponding fixed block, and each supporting block is provided with a circular hole, and the circular holes on the two supporting blocks are coaxially arranged; a winding wheel, two circular plates are fixedly provided in the middle, a winding area is formed between the two circular plates, and the two ends of the winding wheel are respectively rotatably inserted into the two circular holes; a rotating drive mechanism is connected to one end of the winding wheel to drive the winding wheel to rotate; in the first state, the circular plate of the winding wheel is rolled on the ground; in the second state, the door-shaped trailer is driven by the lifting mechanism to separate the circular plate of the winding wheel from the ground.

[0003] In actual use, it is found that the above-mentioned related solutions still have at least the following shortcomings: in the process of winding the coaxial cable on the winding wheel, it does not have the function of guiding the coaxial cable to be wound neatly and orderly on the winding wheel. The winding of the coaxial cable during the winding process is relatively messy and disorderly. When necessary, workers need to stand by and manually organize it, which increases labor intensity and easily causes the risk of pinching fingers. Therefore, we propose a coaxial cable production winding device to solve the above problems. Utility Model Content

[0004] The purpose of the present application is to provide a coaxial cable production winding device, which can neatly and orderly wind the coaxial cable around a winding wheel, thereby improving the winding quality, reducing the labor intensity of workers, and enhancing the safety performance during operation.

[0005] The above-mentioned technical purpose of the present application is achieved through the following technical solutions: a coaxial cable production and winding device, comprising a base plate and a winding wheel arranged above the base plate, wherein a vertical plate is fixedly installed on the top of the base plate, a rotating shaft is rotatably installed on the front side wall of the vertical plate, the rear end of the rotating shaft passes through the vertical plate, and a fixed grinding disk located in front of the vertical plate is fixedly sleeved on the rotating shaft, the winding wheel is slidably sleeved on the rotating shaft and conflicts with the fixed grinding disk, the winding wheel is an I-shaped structure, a movable grinding disk is movable sleeved on the rotating shaft, the movable grinding disk conflicts with the front side wall of the winding wheel, a locking member is arranged at the front end of the rotating shaft for locking the movable grinding disk and the winding wheel on the rotating shaft, a motor is arranged on the rear side of the vertical plate, the output shaft end of the motor is fixedly connected to the rear end of the rotating shaft, and a traction mechanism is arranged on the vertical plate for guiding the coaxial cable to be wound around the winding wheel neatly and orderly.

[0006] The present application is further configured as follows: the locking piece is a locking ring seat, an inner ring wall of the locking ring seat is provided with an internal thread, an outer wall of the front end of the rotating shaft is provided with an external thread, the internal thread on the locking ring seat is adapted to the external thread on the rotating shaft, the locking ring seat threaded sleeve is arranged at the front end of the rotating shaft and conflicts with the movable sanding disk.

[0007] The present application is further configured as follows: a bearing seat is fixedly mounted on the rear side wall of the vertical plate, and the motor is fixedly mounted on the bearing seat.

[0008] The present application is further configured as follows: the traction mechanism includes an L-shaped plate, a reciprocating screw, a movable seat, a U-shaped beam, a traction ring and a drive assembly, the L-shaped plate is fixedly mounted on the front side wall of the vertical plate and is located above the winding wheel, the reciprocating screw is rotatably mounted on the front side wall of the vertical plate, the front end of the reciprocating screw is rotatably connected to the front inner wall of the L-shaped plate, the rear end of the reciprocating screw passes through the vertical plate, the movable seat is threadedly sleeved on the reciprocating screw, the U-shaped beam is fixedly mounted on the top of the movable seat, the traction ring is fixedly mounted on the end of the U-shaped beam away from the movable seat, the drive assembly is arranged on the rear side of the vertical plate, and the drive assembly is used to control the rotation of the reciprocating screw.

[0009] The present application is further configured as follows: the driving assembly includes a main pulley, a secondary pulley and a belt, the main pulley is fixedly sleeved on the rear end of the rotating shaft, the secondary pulley is fixedly sleeved on the rear end of the reciprocating screw, and the belt is sleeved on the main pulley and the secondary pulley.

[0010] The present application is further configured as follows: two guide rods are fixedly mounted on the front side wall of the vertical plate, the reciprocating screw is located between the two guide rods, the front ends of the two guide rods are fixedly connected to the front inner wall of the L-shaped plate, and the movable seat sliding sleeve is arranged on the two guide rods.

[0011] The present application is further configured as follows: two limit plates are fixedly mounted on the L-shaped plate, and the movable seat is located between the two limit plates.

[0012] The present application is further configured as follows: a first electric hydraulic cylinder located in front of the movable sanding disc is fixedly installed on the top of the base plate, a supporting ball is fixedly installed on the output shaft end of the first electric hydraulic cylinder, and the top of the supporting ball is in sliding contact with the bottom of the locking ring seat.

[0013] The present application is further configured as follows: a second electric hydraulic cylinder located below the bearing seat is fixedly installed on the rear side wall of the vertical plate, a circular hole is opened on one side of the vertical plate, an output shaft end of the second electric hydraulic cylinder passes through the circular hole and a push plate is fixedly installed thereon, and the push plate is located below the fixed sanding disc.

[0014] The present application includes at least one of the following beneficial technical effects:

[0015] 1. The present application uses a motor to control the rotation of the rotating shaft, and uses a locking ring seat to lock and fix the movable sanding disc and the winding wheel on the rotating shaft, so that the rotating shaft can drive the movable sanding disc, the winding wheel and the locking ring seat to rotate synchronously. By utilizing the friction force when the fixed sanding disc and the movable sanding disc respectively collide with the front side wall and the rear side wall of the winding wheel, it can be ensured that the rotating shaft drives the movable sanding disc, the winding wheel and the locking ring seat to rotate synchronously more smoothly.

[0016] 2. The present application utilizes a traction mechanism consisting of an L-shaped plate, a reciprocating screw, a movable seat, a U-shaped beam, a traction ring and a driving assembly, and utilizes a driving assembly consisting of a main pulley, a secondary pulley and a belt. In the process of winding the produced coaxial cable around the winding wheel, the coaxial cable can be wound around the winding wheel in an orderly manner, thereby improving the winding quality, reducing the labor intensity of workers, and enhancing the safety performance during operation.

[0017] 3. The present application uses a first electric hydraulic cylinder to control the vertical lifting of the support ball. During the process of winding up the coaxial cable, the support ball is in sliding contact with the bottom of the locking ring seat, so as to support and reinforce the locking ring seat, the rotating shaft and the winding wheel, and ensure that the rotating shaft drives the winding wheel and the locking ring seat to rotate smoothly and stably.

[0018] 4. The present application uses a second electric hydraulic cylinder to control the horizontal linear movement of the push plate, and the push plate can be used to gradually push the winding wheel with the wound coaxial cable out of the rotating shaft to facilitate unloading of the winding wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structure of this embodiment.

[0020] Figure 2 It is a schematic diagram of the right-side structure of this embodiment.

[0021] Figure 3 It is a structural schematic diagram from another viewing angle of this embodiment.

[0022] In the figure, 1. bottom plate; 2. vertical plate; 3. rotating shaft; 4. fixed sanding disc; 5. winding wheel; 6. movable sanding disc; 7. locking ring seat; 8. motor; 9. bearing seat; 10. L-shaped plate; 11. reciprocating screw; 12. moving seat; 13. U-shaped beam; 14. traction ring; 15. main pulley; 16. secondary pulley; 17. belt; 18. guide rod; 19. limit plate; 20. first electric hydraulic cylinder; 21. support ball; 22. second electric hydraulic cylinder; 23. push plate. DETAILED DESCRIPTION

[0023] The technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0024] See also Figure 1 , Figure 2 and Figure 3 The present application provides a coaxial cable production winding device, comprising a bottom plate 1 and a winding wheel 5 arranged above the bottom plate 1, wherein:

[0025] A vertical plate 2 is fixedly installed on the top of the bottom plate 1, and a rotating shaft 3 is rotatably installed on the front side wall of the vertical plate 2. The rear end of the rotating shaft 3 passes through the vertical plate 2, and a fixed grinding disk 4 located in front of the vertical plate 2 is fixedly sleeved on the rotating shaft 3. The winding wheel 5 is slidably sleeved on the rotating shaft 3 and conflicts with the fixed grinding disk 4. The winding wheel 5 is an I-shaped structure. The fixed grinding disk 4 is used to block and limit the position of the winding wheel 5 sleeved on the rotating shaft 3. The winding wheel 5 is used to reel and wind the coaxial cable. A movable grinding disk 6 is movably sleeved on the rotating shaft 3. The movable grinding disk 6 conflicts with the front side wall of the winding wheel 5. A locking member for locking and fixing the movable grinding disk 6 and the winding wheel 5 on the rotating shaft 3 is provided at the front end of the rotating shaft 3. The locking member is a locking ring seat 7. The inner ring wall of the locking ring seat 7 is provided with an internal thread. The front end outer wall of 3 is provided with an external thread, the internal thread on the locking ring seat 7 is matched with the external thread on the rotating shaft 3, the locking ring seat 7 is threadedly sleeved on the front end of the rotating shaft 3 and conflicts with the movable sanding disc 6, and the locking ring seat 7 can be used to lock and fix the movable sanding disc 6 and the winding wheel 5 on the rotating shaft 3, so that the rotating shaft 3 can drive the movable sanding disc 6, the winding wheel 5 and the locking ring seat 7 to rotate synchronously, and by utilizing the friction force when the fixed sanding disc 4 and the movable sanding disc 6 conflict with the front side wall and the rear side wall of the winding wheel 5 respectively, it can be ensured that the rotating shaft 3 drives the movable sanding disc 6, the winding wheel 5 and the locking ring seat 7 to rotate synchronously more smoothly. A motor 8 is arranged on the rear side of the vertical plate 2, and the output shaft end of the motor 8 is fixedly connected to the rear end of the rotating shaft 3. It should be noted that the locking ring seat 7 The direction of rotation of the screw on the rotating shaft 3 is opposite to the direction in which the rotating shaft 3 is driven by the motor 8 to rotate, thereby ensuring that the locking ring seat 7 will not loosen on the rotating shaft 3 when the coaxial cable is wound. A traction mechanism for guiding the coaxial cable to be neatly and orderly wound around the winding wheel 5 is provided on the vertical plate 2. The above-mentioned traction mechanism includes an L-shaped plate 10, a reciprocating screw 11, a movable seat 12, a U-shaped beam 13, a traction ring 14 and a driving assembly. The L-shaped plate 10 is fixedly mounted on the front side wall of the vertical plate 2 and is located above the winding wheel 5. The reciprocating screw 11 is rotatably mounted on the front side wall of the vertical plate 2. The front end of the reciprocating screw 11 is rotatably connected to the front inner wall of the L-shaped plate 10, and the rear end of the reciprocating screw 11 passes through the vertical plate 2. The movable seat 12 is threadedly sleeved on the reciprocating screw 11, and the U-shaped beam 13 is fixedly installed on the top of the moving seat 12, and the traction ring 14 is fixedly installed on the end of the U-shaped beam 13 away from the moving seat 12. The driving assembly is arranged on the rear side of the vertical plate 2. The driving assembly is used to control the rotation of the reciprocating screw 11. The threaded connection between the reciprocating screw 11 and the moving seat 12 is used to make the moving seat 12 drive the U-shaped beam 13 and the traction ring 14 to move horizontally back and forth when the reciprocating screw 11 rotates. The horizontal reciprocating movement of the traction ring 14 can be used to drag the coaxial cable to move horizontally back and forth, so that the coaxial cable can be neatly and orderly wound on the winding wheel 5. The driving assembly includes a main pulley 15, a secondary pulley 16 and a belt 17. The main pulley 15 is fixedly sleeved on the rear end of the rotating shaft 3, and the secondary pulley 16 is fixedly sleeved on the rear end of the reciprocating screw 11.The belt 17 is sleeved on the main pulley 15 and the secondary pulley 16. The main pulley 15, the secondary pulley 16 and the belt 17 are used to drive the shaft 3 and the reciprocating screw 11 to rotate simultaneously.

[0026] In this embodiment, a bearing seat 9 is fixedly mounted on the rear side wall of the vertical plate 2 , and the motor 8 is fixedly mounted on the bearing seat 9 for stably supporting the motor 8 .

[0027] In this embodiment, two guide rods 18 are fixedly installed on the front side wall of the vertical plate 2, and the reciprocating screw 11 is located between the two guide rods 18. The front ends of the two guide rods 18 are fixedly connected to the front inner wall of the L-shaped plate 10. The moving seat 12 is slidably sleeved on the two guide rods 18 to guide the movement direction of the moving seat 12 to ensure the stability of the moving seat 12 during horizontal movement. Two limit plates 19 are fixedly installed on the L-shaped plate 10. The moving seat 12 is located between the two limit plates 19 to limit the movement stroke of the moving seat 12.

[0028] In this embodiment, a first electric hydraulic cylinder 20 located in front of the movable sanding disc 6 is fixedly installed on the top of the base plate 1, and a support ball 21 is fixedly installed on the output shaft end of the first electric hydraulic cylinder 20. The top of the support ball 21 is in sliding contact with the bottom of the locking ring seat 7. The first electric hydraulic cylinder 20 can be used to control the vertical lifting and lowering of the support ball 21. The locking ring seat 7, the rotating shaft 3 and the winding wheel 5 can be supported and reinforced by using the sliding contact between the support ball 21 and the bottom of the locking ring seat 7, and the rotating shaft 3 can drive the winding wheel 5 and the locking ring seat 7 to rotate smoothly and stably. It should be noted that the outer surface of the support ball 21 and the outer surface of the locking ring seat 7 are both smooth surfaces.

[0029] In this embodiment, a second electric hydraulic cylinder 22 located below the bearing seat 9 is fixedly installed on the rear side wall of the vertical plate 2. A circular hole is opened on one side of the vertical plate 2. The output shaft end of the second electric hydraulic cylinder 22 passes through the circular hole and a push plate 23 is fixedly installed. The push plate 23 is located below the fixed sanding disk 4. The second electric hydraulic cylinder 22 can be used to control the push plate 23 to move horizontally and linearly. The push plate 23 can be used to gradually push the winding wheel 5 with the wound coaxial cable out of the rotating shaft 3 to facilitate the unloading of the winding wheel 5.

[0030] In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, the first electric hydraulic cylinder 20 is in an extended state, and the second electric hydraulic cylinder 22 is in a retracted and reset state. When the first electric hydraulic cylinder 20 retracts and resets to drive the support ball 21 to drop to the lowest position, the height of the support ball 21 is lower than the bottom of the winding wheel 5.

[0031] In the present embodiment, it should be noted that the motor 8, the first electric hydraulic cylinder 20 and the second electric hydraulic cylinder 22 can all be purchased on the market, the motor 8, the first electric hydraulic cylinder 20 and the second electric hydraulic cylinder 22 are equipped with a power supply, and their line connection and control methods are mature technologies in the field and are fully disclosed, so they will not be elaborated in this article.

[0032] Through the above-mentioned structure, when the coaxial cable production and winding device provided by the present application is in use, in the process of winding the produced coaxial cable around the winding wheel 5, the coaxial cable can be neatly and orderly wound around the winding wheel 5 by utilizing the traction mechanism, thereby improving the winding quality, reducing the labor intensity of workers, and enhancing the safety performance during operation. During specific operation, the winding wheel 5 is mounted on the rotating shaft 3 and abuts against the fixed grinding disk 4, and then the movable grinding disk 6 is mounted on the rotating shaft 3 and abuts against the winding wheel 5, and then the locking ring seat 7 is threadedly installed on the rotating shaft 3 and abuts against the movable grinding disk 6, thereby completing the stable fixing of the winding wheel 5. The first electric hydraulic cylinder 20 is then started to extend and run, so that the supporting ball 21 can be controlled to rise to contact with the bottom of the locking ring seat 7 to support the locking ring seat 7. Then, one end of the produced coaxial cable is passed through the traction ring 14 and then this end of the coaxial cable is tied to the winding wheel 5 with a cable tie or a rope. Then, the motor 8 is started to run, and the motor 8 drives the rotating shaft 3, the main pulley 15, the rotating shaft 3, the fixed grinding disc 4, the winding wheel 5, the movable grinding disc 6 and the locking ring seat 7 to rotate, so that the coaxial cable can be gradually wound around the winding wheel 5. In the process of winding the coaxial cable, the main pulley 15 is used to The transmission effect of the auxiliary pulley 16 and the belt 17 can control the rotating shaft 3 and the reciprocating screw 11 to rotate simultaneously. The threaded connection between the reciprocating screw 11 and the movable seat 12 can be used to control the movable seat 12 to drive the U-shaped beam 13 and the traction ring 14 to move horizontally back and forth. The horizontal reciprocating movement of the traction ring 14 can be used to drag the coaxial cable to move horizontally back and forth, so that the coaxial cable can be neatly and orderly wound around the winding wheel 5. After the winding is completed, the motor 8 is stopped and the first electric hydraulic cylinder 20 is controlled to shrink and reset, so that the support ball 21 can be lowered back to its position, and then the locking ring seat 7 is rotated off the rotating shaft 3 to be removed. The movable sanding disc 6 is then controlled to extend the second electric hydraulic cylinder 22 to control the push plate 23 to move horizontally and linearly, and the push plate 23 can be used to push the winding wheel 5 on which the coaxial cable is wound to gradually separate from the rotating shaft 3 (before pushing out and removing the winding wheel 5, a sponge pad of a certain thickness can be laid in front of the bottom plate 1 to prevent the winding wheel 5 from being damaged or hitting the ground), so that the winding wheel 5 slides out of the rotating shaft 3 and can be transported away by a forklift or other tools, and then the second electric hydraulic cylinder 22 is controlled to retract and reset, so that the push plate 23 can be controlled to return to its original position. According to the above operating steps, another winding wheel 5 can be taken and mounted on the rotating shaft 3 to continue winding the coaxial cable.

Claims

1. A coaxial cable production winding device, characterized in that: The utility model comprises a bottom plate (1) and a winding wheel (5) arranged above the bottom plate (1), a vertical plate (2) is fixedly installed on the top of the bottom plate (1), a rotating shaft (3) is rotatably installed on the front side wall of the vertical plate (2), the rear end of the rotating shaft (3) passes through the vertical plate (2), a fixed grinding disc (4) located in front of the vertical plate (2) is fixedly mounted on the rotating shaft (3), the winding wheel (5) is slidably mounted on the rotating shaft (3) and contacts the fixed grinding disc (4), the winding wheel (5) is of an I-shaped structure, and the rotating shaft (3) is fixedly mounted on the fixed grinding disc (4). A movable sanding disc (6) is movably sleeved on the shaft (3), and the movable sanding disc (6) contacts the front side wall of the winding wheel (5). A locking member for locking and fixing the movable sanding disc (6) and the winding wheel (5) on the shaft (3) is arranged at the front end of the shaft (3). A motor (8) is arranged at the rear side of the vertical plate (2), and the output shaft end of the motor (8) is fixedly connected to the rear end of the shaft (3). A traction mechanism for guiding the coaxial cable to be neatly and orderly wound around the winding wheel (5) is arranged on the vertical plate (2).

2. A coaxial cable production and winding device according to claim 1, characterized in that: The locking member is a locking ring seat (7), an inner ring wall of the locking ring seat (7) is provided with an internal thread, and an outer wall of the front end of the rotating shaft (3) is provided with an external thread. The internal thread on the locking ring seat (7) is matched with the external thread on the rotating shaft (3), and the locking ring seat (7) is threadedly sleeved on the front end of the rotating shaft (3) and abuts against the movable grinding disc (6).

3. A coaxial cable production and winding device according to claim 1, characterized in that: A bearing seat (9) is fixedly mounted on the rear side wall of the vertical plate (2), and the motor (8) is fixedly mounted on the bearing seat (9).

4. A coaxial cable production and winding device according to claim 1, characterized in that: The traction mechanism comprises an L-shaped plate (10), a reciprocating screw (11), a movable seat (12), a U-shaped beam (13), a traction ring (14) and a driving assembly. The L-shaped plate (10) is fixedly mounted on the front side wall of the vertical plate (2) and is located above the winding wheel (5). The reciprocating screw (11) is rotatably mounted on the front side wall of the vertical plate (2). The front end of the reciprocating screw (11) is rotatably connected to the front inner wall of the L-shaped plate (10). The rear end of the reciprocating screw (11) passes through the vertical plate (2). The movable seat (12) is threadedly sleeved on the reciprocating screw (11). The U-shaped beam (13) is fixedly mounted on the top of the movable seat (12). The traction ring (14) is fixedly mounted on one end of the U-shaped beam (13) away from the movable seat (12). The driving assembly is arranged on the rear side of the vertical plate (2). The driving assembly is used to control the rotation of the reciprocating screw (11).

5. A coaxial cable production and winding device according to claim 4, characterized in that: The driving assembly comprises a main pulley (15), a secondary pulley (16) and a belt (17); the main pulley (15) is fixedly sleeved on the rear end of the rotating shaft (3); the secondary pulley (16) is fixedly sleeved on the rear end of the reciprocating screw (11); and the belt (17) is sleeved on the main pulley (15) and the secondary pulley (16).

6. A coaxial cable production and winding device according to claim 4, characterized in that: Two guide rods (18) are fixedly mounted on the front side wall of the vertical plate (2), the reciprocating screw (11) is located between the two guide rods (18), the front ends of the two guide rods (18) are fixedly connected to the front inner wall of the L-shaped plate (10), and the movable seat (12) is slidably sleeved on the two guide rods (18).

7. A coaxial cable production and winding device according to claim 4, characterized in that: Two limiting plates (19) are fixedly mounted on the L-shaped plate (10), and the movable seat (12) is located between the two limiting plates (19).

8. A coaxial cable production and winding device according to claim 2, characterized in that: A first electric hydraulic cylinder (20) located in front of the movable sanding disc (6) is fixedly mounted on the top of the base plate (1), and a supporting ball (21) is fixedly mounted on the output shaft end of the first electric hydraulic cylinder (20), and the top of the supporting ball (21) is in sliding contact with the bottom of the locking ring seat (7).

9. A coaxial cable production and winding device according to claim 3, characterized in that: A second electric hydraulic cylinder (22) located below the bearing seat (9) is fixedly mounted on the rear side wall of the vertical plate (2); a circular hole is opened on one side of the vertical plate (2); an output shaft end of the second electric hydraulic cylinder (22) passes through the circular hole and is fixedly mounted with a push plate (23); the push plate (23) is located below the fixed sanding disc (4).

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