Device for disassembling and assembling vortex spinning front roller and disassembling and assembling method thereof

Abstract

The invention discloses a device for dismounting a vortex spinning front roller and a dismounting method thereof, and relates to the technical field of vortex spinning.The device comprises a base, vertical frames are symmetrically fixed to the top end of the base, a top plate is fixed to the top ends of the two sets of vertical frames jointly, a hanging frame is fixed to the bottom end of the top plate, and a reinforcing supporting plate is fixed to the rear sides of the hanging frame and the vertical frames jointly; the lifting frame is used for containing the front roller, the jack used for jacking the front roller upwards is arranged at the top end of the base, the roller body of the front roller and the hub gear are convenient to mount and dismount through cooperation of the lifting frame and the jack, only one-man operation is needed, time and labor are saved, and the labor cost is reduced; compared with the prior art, the disassembly and assembly efficiency and the maintenance efficiency of the front roller are improved, the convenience and efficiency of assembly and disassembly of the vortex spinning front roller are improved, in the disassembly and assembly process, the human body is not prone to being hurt, safety is high, meanwhile, deformation damage to the hub gear can be avoided, and therefore follow-up normal use of the front roller is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of vortex spinning, and in particular to a device for disassembling and assembling a front roller of vortex spinning and a disassembling and assembling method thereof. Background Art

[0002] Vortex spinning is a new spinning method that uses a fixed vortex spinning tube instead of a high-speed rotating spinning cup for spinning. It twists the fibers into yarn through the action of airflow, thereby realizing the spinning process. The vortex spinning device is a spinning device that uses vortex-like airflow to condense and twist the fibers. The core of this device lies in its spinning nozzle, which can generate high-speed rotating airflow, so that the fibers can be effectively twisted and condensed therein. The advantage of the vortex spinning device lies in its high speed and high output. It can significantly improve spinning efficiency while reducing energy consumption and labor costs.

[0003] The main components of the vortex spinning device include yarn core input roller, front roller, front leather roller, vortex spinning box and output roller, among which the front roller is responsible for inputting the short fiber slivers into the vortex spinning box. In the actual production process, if the hub gear at the end of the front roller is damaged during a long period of spinning, mechanical waves will be generated, which will affect the yarn quality and easily cause quality accidents. Therefore, it is necessary to regularly disassemble and assemble the hub gears at both ends of the front roller for maintenance, inspection or replacement.

[0004] The existing method of disassembling and installing the hub gear at the end of the front roller relies entirely on manual operation, and workers are required to use a puller and a hammer to perform installation and disassembly work. Since the hub gear is relatively short, the puller is not easy to fix, and three people are required to operate it during installation, which is time-consuming and labor-intensive, increases labor costs, has low disassembly and assembly efficiency, and is easy to hurt hands during installation and disassembly, posing certain safety hazards. In addition, due to the high precision between the front roller body and the hub gear at its end, hitting the hub gear with a hammer during installation can easily cause it to deform and damage, thereby affecting the normal operation of the front roller. Therefore, the present invention proposes a device for disassembling and assembling a vortex spinning front roller and a disassembly and assembly method thereof to solve the problems existing in the prior art. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to propose a device for disassembling and assembling a vortex spinning front roller and a disassembly and assembly method thereof, so as to solve the problem that the existing method of disassembling and installing the hub gear at the end of the front roller relies on manual operation, is time-consuming and labor-intensive, increases labor costs, has low disassembly and assembly efficiency, and has certain safety hazards. In addition, the hub gear is easily deformed and damaged by hitting it with a hammer during installation.

[0006] In order to achieve the purpose of the present invention, the present invention is implemented through the following technical scheme: a device for disassembling and assembling the front roller of vortex spinning, comprising a base, a vertical frame is symmetrically fixed to the top of the base, a top plate is commonly fixed to the top of two groups of the vertical frames, a hanging frame is fixed to the bottom of the top plate, a reinforcing support plate is commonly fixed to the hanging frame and the rear side of the vertical frame, a through hole is opened at the bottom of the hanging frame, a limiting block is slidably inserted in the upper part of the hanging frame, a rubber buffer pad is fixed to the bottom of the limiting block, a front roller limiting mechanism is provided at the lower part of the hanging frame, a jack is clamped at the top of the base through a clamping mechanism, the output end push rod of the jack is vertically upward and corresponds to the position of the through hole, a storage plate is symmetrically fixed to the front of the reinforcing support plate, and top columns and U-shaped pads are respectively placed on the two groups of the storage plates.

[0007] A further improvement is that slots are equidistantly provided on the upper parts of the inner walls on both sides of the hanging frame, and plug blocks adapted to the slots are fixed to the outer walls on both sides of the limit block, and the plug blocks extend to the slots.

[0008] A further improvement is that the front roller limiting mechanism includes a screw rod with threads passing through the two side walls of the hanging frame and a movable plate symmetrically arranged in the hanging frame, a turntable is fixed to the end of the screw rod away from the movable plate, and the end of the screw rod away from the turntable is rotatably connected to the movable plate through a bearing, and arc-shaped clamping plates are fixed to the opposite sides of the two groups of movable plates.

[0009] A further improvement is that a sliding rod that slides through the side wall of the hanging frame is symmetrically fixed on the side of the movable plate away from the arc-shaped clamping plate, and grooves are equidistantly provided on the arc-shaped clamping plate. A pulley is rotatably connected in the groove, and the pulley extends to the outside of the groove away from the side of the movable plate.

[0010] A further improvement is that the clamping mechanism includes an arc-shaped clamping block slidably connected to both sides of the top of the base and a fixed block fixed to the side of the arc-shaped clamping block away from the jack, a locking bolt is threaded through the fixing block, and a positioning block is connected to the bottom end of the locking bolt.

[0011] A further improvement is that a T-shaped slider is fixed to the bottom end of the arc-shaped clamping block, a T-shaped slide groove adapted to the T-shaped slider is provided at the top end of the base, and the T-shaped slider is slidably arranged in the T-shaped slide groove.

[0012] A further improvement is that partitions are fixed at equal intervals inside the vertical frame, mounting blocks are fixed to the outer walls on both sides of the base, and mounting bolts are threaded through the mounting blocks.

[0013] A method for disassembling and assembling a device for disassembling a vortex spinning front roller comprises an installation step and a disassembly step, wherein the installation step comprises:

[0014] Step 1: First, place the roller body of the front roller into the hanging frame, and let the bottom end of the roller body pass through the through hole. Then, use the front roller limiting mechanism to limit the roller body. Then, place the hub gear to be installed on the top of the jack and align it with the roller body. Then, slide and insert the limiting block into the hanging frame to limit the top of the roller body.

[0015] Step 2: Then the worker operates the jack to lift the hub gear at the top until the hub gear is completely sleeved on the end of the roller body, repeat the above steps, and press the hub gear into the other end of the roller body, thus completing the installation of the front roller;

[0016] The disassembly steps are:

[0017] Step 1: first put the front roller with a hub gear on the end into the hanging frame, and make the hub gear at the bottom of the front roller pass through the through hole, and then use the front roller limiting mechanism to limit the roller body of the front roller;

[0018] Step 2: Then place the U-shaped pad between the bottom end of the hanging frame and the hub gear and clamp it on the roller body of the front roller, then place the top column on the top of the jack and make the top column and the roller body of the front roller on the same center line;

[0019] Step 3: Then take out the limit block in the hanging frame to remove the obstruction to the top of the front roller. Then the worker operates the jack to lift up the top column placed on the top. During the rising process, the top column contacts the bottom end of the roller body of the front roller and drives the front roller to rise synchronously. During the rising process of the front roller, the hub gear at its bottom is blocked by the U-shaped pad and keeps its position unchanged, and the roller body of the front roller continues to rise until the roller body is separated from the hub gear set underneath it. Repeat the above steps to remove the hub gear at the other end of the roller body to complete the disassembly of the front roller.

[0020] The beneficial effects of the present invention are as follows: the present invention provides a hanging frame for accommodating the front roller, and provides a jack at the top of the base for lifting the front roller upwards, so that the roller body of the front roller and the hub gear are easy to install and disassemble through the cooperation of the hanging frame and the jack, and only requires one person to operate, which saves time and effort, reduces labor costs, improves the disassembly and maintenance efficiency of the front roller, and improves the convenience and efficiency of installation and disassembly of the vortex spinning front roller. It is not easy to cause harm to the human body during the disassembly and assembly process, and has high safety. At the same time, it can avoid deformation and damage to the hub gear, thereby ensuring the subsequent normal use of the front roller, facilitating the maintenance and production of the workshop, and reducing the occurrence of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a schematic diagram of the three-dimensional structure of the front roller in an embodiment of the present invention;

[0023] Figure 2 It is a front view of the device for disassembling and assembling the vortex spinning front roller of the present invention.

[0024] Figure 3 It is a front cross-sectional view of the device for disassembling and assembling the vortex spinning front roller of the present invention;

[0025] Figure 4 The present invention Figure 3 A in the enlarged view;

[0026] Figure 5 The present invention Figure 3 The enlarged view of point B in the figure;

[0027] Figure 6 It is a top view of the front roller limiting mechanism of the present invention.

[0028] Among them: 1. Base; 2. Vertical frame; 3. Top plate; 4. Hanging frame; 5. Strengthening support plate; 6. Through hole; 7. Limit block; 8. Jack; 9. Storage plate; 10. Top column; 11. U-shaped pad; 12. Slot; 13. Insert block; 14. Screw; 15. Moving plate; 16. Turntable; 17. Arc clamping plate; 18. Slide rod; 19. Groove; 20. Pulley; 21. Arc clamping block; 22. Fixed block; 23. Locking bolt; 24. Positioning block; 25. T-shaped slider; 26. T-shaped slide groove; 27. Partition; 28. Mounting block. DETAILED DESCRIPTION

[0029] 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.

[0030] The front roller disassembled in the present invention is as follows Figure 1 As shown, it consists of a roller body and hub gears sleeved on both ends of the roller body.

[0031] Embodiment 1

[0032] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 The present embodiment provides a device for disassembling and assembling the front roller of eddy current spinning, comprising a horizontally arranged base 1 and a vertical frame 2 fixed to the left and right sides of the top of the base 1 by bolts, a group of top plates 3 are fixed to the top of the two groups of vertical frames 2 by bolts, a hanging frame 4 for accommodating the front roller is fixed to the bottom of the top plate 3 by bolts, the front of the hanging frame 4 is designed to be open, which is convenient for the front roller to be put in, a group of reinforcing support plates 5 are fixed to the rear side of the hanging frame 4 and the vertical frame 2 by bolts, which play a reinforcing support role and improve the structural stability of the hanging frame 4, a through hole 6 adapted to the front roller is opened at the bottom of the hanging frame 4 for the front roller to pass through, a limiting block 7 is slidably inserted at the top of the hanging frame 4 to limit the top of the front roller, a rubber buffer pad with a buffering effect is fixed to the bottom of the limiting block 7, and a front roller limiting mechanism for limiting the front roller in the hanging frame 4 is provided at the bottom of the hanging frame 4, by limiting the front roller, so that it can be disassembled and assembled without hand support to avoid its skewness. Shift, a jack 8 is placed in the middle position of the top of the base 1, and the jack 8 is clamped to the top of the base 1 by a clamping mechanism to prevent the jack 8 from shifting during operation. The output end push rod of the jack 8 is vertically arranged upward and corresponds to the position of the through hole 6. The left and right sides of the front of the reinforcing support plate 5 are welded and fixed with storage plates 9, wherein a top column 10 is placed on the storage plate 9 on the left, and the diameter of the top column 10 is smaller than the diameter of the front roller body. The top column 10 is used to be placed on the top of the jack 8 during the disassembly of the front roller, so that the jack 8 can lift the front roller body upward through the top column 10, and a U-shaped pad 11 is placed on the right storage plate 9. The U-shaped pad 11 is provided with a U-shaped groove adapted to the front roller body. The U-shaped pad 11 is used to be placed between the bottom end of the hanging frame 4 and the bottom hub gear of the front roller during the disassembly of the front roller, so that the bottom hub gear can remain motionless during the process of the front roller roller body being lifted, thereby separating the front roller roller body and the hub gear.

[0033] The upper part of the inner wall on the left and right sides of the hanging frame 4 is provided with slots 12 which are equidistantly distributed. The outer walls on the left and right sides of the limit block 7 are both welded and fixed with plug-in blocks 13, and the plug-in blocks 13 are adapted to the slots 12. The plug-in blocks 13 extend to the slots 12. The limit block 7 is plugged in through the cooperation of the plug-in blocks 13 and the slots 12. At the same time, the limit block 7 is easy to adjust in height, and the limit height of the front roller can be conveniently adjusted.

[0034] The front roller limiting mechanism includes a screw rod 14 and a movable plate 15, wherein the screw rod 14 is provided with two groups and respectively penetrates the left and right side walls of the hanging frame 4 with threads, the movable plate 15 is provided with two groups and is symmetrically arranged on the left and right sides of the hanging frame 4, the end of the screw rod 14 away from the movable plate 15 is fixed with a turntable 16 by a screw, and the end of the screw rod 14 away from the turntable 16 is rotatably connected with the movable plate 15 through a bearing, and the two groups of movable plates 15 are welded and fixed with arc-shaped clamping plates 17 adapted to the front roller roller body on the opposite sides, and the two groups of movable plates 15 are symmetrically fixed with sliding rods 18 on the opposite sides, and the end of the sliding rod 18 away from the movable plate 15 slides through the side wall of the hanging frame 4, so as to limit the movable plate 15, so that the movable plate 15 is more stable during the movement process, and the two groups of screw rods 14 are rotated toward each other by rotating the turntable 16, and the two groups of movable plates 15 and the arc-shaped clamping plates 17 are driven to move toward each other, thereby forming a limiting structure on both sides of the front roller, so that the front roller can only be lifted and lowered during the disassembly and assembly process without displacement;

[0035] The arc-shaped clamping plate 17 is provided with grooves 19 which are distributed at equal intervals. A pulley 20 is rotatably connected in the groove 19, and the pulley 20 extends to the outside of the groove 19 away from the side of the movable plate 15. When the arc-shaped clamping plate 17 limits the front roller, the pulley 20 is provided to make the lifting process of the front roller smoother.

[0036] The clamping mechanism includes an arc-shaped clamping block 21 and a fixed block 22, wherein the arc-shaped clamping block 21 is provided with two groups and is slidably connected to the left and right sides of the top of the base 1 respectively, and the fixed block 22 is welded and fixed to the side of the arc-shaped clamping block 21 away from the jack 8, and a locking bolt 23 is threaded through the fixed block 22, and a positioning block 24 is connected to the bottom end of the locking bolt 23. The positioning block 24 is driven to descend by turning the locking bolt 23 downward until the positioning block 24 contacts the top of the base 1, thereby realizing the positioning and fixing of the arc-shaped clamping block 21, and a T-shaped slider 25 is fixed to the bottom end of the arc-shaped clamping block 21, and the base A T-shaped slot 26 is provided at the top of the base 1, and the T-shaped slot 26 is adapted to the T-shaped slider 25. The T-shaped slider 25 is slidably arranged in the T-shaped slot 26 to realize the sliding connection between the arc-shaped clamping block 21 and the base 1. When in use, the jack 8 is first placed in the middle position of the top of the base 1, and then the two groups of arc-shaped clamping blocks 21 are moved to both sides of the jack 8 and limit the jack 8. Then, the locking bolts 23 are turned downward to realize the positioning and fixing of the arc-shaped clamping block 21, so that the two groups of arc-shaped clamping blocks 21 are used to limit the jack 8, so that the jack 8 remains stable during use.

[0037] The interior of the vertical frame 2 is welded and fixed with partitions 27 that are evenly distributed and are used to place the parts required during the disassembly and assembly process. The outer walls on both sides of the base 1 are welded and fixed with mounting blocks 28. The mounting blocks 28 are threaded with mounting bolts. The base 1 is fixed to the ground by the mounting bolts on the mounting blocks 28, so that the device is fixed.

[0038] Embodiment 2

[0039] This embodiment provides a method for disassembling and assembling a device for eddy current spinning front rollers, comprising an installation step and a disassembly step, wherein the installation step is:

[0040] Step 1: first, place the roller body of the front roller to be installed into the hanging frame 4 from the front side of the hanging frame 4, and make the bottom end of the roller body pass through the through hole 6, so that the lower part of the roller body is located below the hanging frame 4, then use the front roller limiting mechanism in the hanging frame 4 to limit the roller body in the hanging frame 4, so that the roller body remains stable and can only move up and down, then place the hub gear to be installed on the top of the jack 8, and align the hub gear with the roller body, so that the two are on the same center line, and then slide the limit block 7 into the inside of the hanging frame 4, so as to use the limit block 7 to limit the top of the roller body, so that the roller body will not be forced to move upward;

[0041] Step 2: Then the worker operates the jack 8 to make the top rod of the jack 8 continuously lift the hub gear at its top upward until the hub gear is completely sleeved on the end of the roller body, that is, the installation of the hub gear at the lower part of the roller body is completed, and then the roller body is taken out and turned over, and put back into the hanging frame 4, and the above steps are repeated to press the hub gear at the other end of the roller body, that is, the installation of the front roller is completed;

[0042] The disassembly steps are:

[0043] Step 1: first, place the front roller with hub gears at both ends into the hanging frame 4, and make the hub gear at the bottom of the front roller pass through the through hole 6, and then use the front roller limiting mechanism to limit the roller body of the front roller, so that the roller body remains stable and can only move up and down;

[0044] Step 2: Then remove the U-shaped pad 11 on the right side storage plate 9 and place it between the bottom end of the hanging frame 4 and the hub gear. At the same time, clamp the U-shaped pad 11 on the roller body of the front roller to act as a barrier between the hanging frame 4 and the hub gear. Then remove the top column 10 on the left side storage plate 9 and place it vertically on the top of the jack 8, so that the top column 10 and the roller body of the front roller are on the same center line;

[0045] Step three: then take out the limit block 7 that is slidably inserted in the hanging frame 4 to remove the obstruction to the top of the front roller, so that the front roller can be forced to rise. After that, the worker operates the jack 8 to continuously lift up the top column 10 placed on the top of the front roller. During the rising process, the top column 10 contacts the bottom end of the roller body of the front roller and drives the front roller to rise synchronously. During the rising process of the front roller, the hub gear at its bottom is blocked by the U-shaped pad 11 and keeps its position unchanged, and the roller body of the front roller continues to rise until the roller body is separated from the hub gear set thereunder, that is, the disassembly of the hub gear at the bottom of the roller body is completed, the roller body is taken out and turned over, and put back into the hanging frame 4, and the above steps are repeated to remove the hub gear at the other end of the roller body, that is, the disassembly of the hub gears at both ends of the front roller is completed.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for disassembling and assembling a vortex spinning front roller, comprising a base (1), characterized in that: A vertical frame (2) is symmetrically fixed to the top of the base (1), a top plate (3) is commonly fixed to the tops of the two groups of vertical frames (2), a hanging frame (4) is fixed to the bottom of the top plate (3), a reinforcing support plate (5) is commonly fixed to the rear sides of the hanging frame (4) and the vertical frame (2), a through hole (6) is opened at the bottom of the hanging frame (4), a limit block (7) is slidably inserted in the upper part of the hanging frame (4), a rubber buffer pad is fixed to the bottom of the limit block (7), a front roller limit mechanism is provided at the lower part of the hanging frame (4), a jack (8) is clamped at the top of the base (1) through a clamping mechanism, an output end push rod of the jack (8) is vertically upward and corresponds to the position of the through hole (6), a storage plate (9) is symmetrically fixed to the front of the reinforcing support plate (5), and a top column (10) and a U-shaped pad (11) are respectively placed on the two groups of the storage plates (9).

2. The device for disassembling and assembling the vortex spinning front roller according to claim 1, characterized in that: Slots (12) are equidistantly provided on the upper parts of the inner walls on both sides of the hanging frame (4), and plug blocks (13) adapted to the slots (12) are fixed to the outer walls on both sides of the limit block (7), and the plug blocks (13) extend to the slots (12).

3. The device for disassembling and assembling the vortex spinning front roller according to claim 1, characterized in that: The front roller limiting mechanism comprises a screw rod (14) threadedly penetrating two side walls of a hanging frame (4) and a movable plate (15) symmetrically arranged in the hanging frame (4); a rotating disk (16) is fixed to one end of the screw rod (14) away from the movable plate (15); the end of the screw rod (14) away from the rotating disk (16) is rotatably connected to the movable plate (15) via a bearing; and arc-shaped clamping plates (17) are fixed to opposite sides of two groups of movable plates (15).

4. The device for disassembling and assembling the vortex spinning front roller according to claim 3, characterized in that: A sliding rod (18) is symmetrically fixed on one side of the movable plate (15) away from the arc-shaped clamping plate (17) and slides through the side wall of the hanging frame (4); grooves (19) are equidistantly provided on the arc-shaped clamping plate (17); a pulley (20) is rotatably connected in the groove (19); and the pulley (20) extends to the outside of the groove (19) away from the side of the movable plate (15).

5. The device for disassembling and assembling the vortex spinning front roller according to claim 1, characterized in that: The clamping mechanism comprises an arc-shaped clamping block (21) slidably connected to both sides of the top of the base (1) and a fixing block (22) fixed to the side of the arc-shaped clamping block (21) away from the jack (8), a locking bolt (23) is threadedly penetrated on the fixing block (22), and a positioning block (24) is connected to the bottom end of the locking bolt (23).

6. The device for disassembling and assembling the vortex spinning front roller according to claim 5, characterized in that: A T-shaped slider (25) is fixed to the bottom end of the arc-shaped clamping block (21), a T-shaped slide groove (26) adapted to the T-shaped slider (25) is provided at the top end of the base (1), and the T-shaped slider (25) is slidably arranged in the T-shaped slide groove (26).

7. The device for disassembling and assembling the vortex spinning front roller according to claim 1, characterized in that: Partition plates (27) are fixed at equal intervals inside the vertical frame (2), and mounting blocks (28) are fixed to the outer walls on both sides of the base (1), and mounting bolts are threadedly penetrated on the mounting blocks (28).

8. A method for disassembling and assembling a device for disassembling and assembling a vortex spinning front roller as claimed in claim 1, characterized in that: The method includes installation steps and removal steps, wherein the installation steps are: Step 1: first, place the roller body of the front roller into the hanging frame (4), and make the bottom end of the roller body pass through the through hole (6), then use the front roller limiting mechanism to limit the roller body, then place the hub gear to be installed on the top of the jack (8) and align it with the roller body, and then slide the limiting block (7) into the hanging frame (4) to limit the top end of the roller body; Step 2: A worker then operates a jack (8) to lift the hub gear at the top of the roller upward until the hub gear is completely sleeved on the end of the roller body, and repeats the above steps to press the hub gear into the other end of the roller body, thus completing the installation of the front roller; The disassembly steps are: Step 1: firstly, place the front roller with a hub gear sleeved on the end into the hanging frame (4), and make the hub gear at the bottom end of the front roller pass through the through hole (6), and then use the front roller limiting mechanism to limit the roller body of the front roller; Step 2: Then, place the U-shaped pad (11) between the bottom end of the hanging frame (4) and the hub gear and clamp it on the roller body of the front roller, then place the top column (10) on the top of the jack (8), and make the top column (10) and the roller body of the front roller on the same center line; Step 3: Then, the limit block (7) in the hanging frame (4) is taken out to remove the obstruction to the top of the front roller. Then, the worker operates the jack (8) to lift the top column (10) placed on the top of the front roller upward. During the rising process, the top column (10) contacts the bottom end of the roller body of the front roller and drives the front roller to rise synchronously. During the rising process of the front roller, the hub gear at the bottom end is blocked by the U-shaped pad (11) and keeps its position unchanged. The roller body of the front roller continues to rise until the roller body is separated from the hub gear set below it. Repeat the above steps to remove the hub gear at the other end of the roller body, and the disassembly of the front roller is completed.

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