CN113070358A

CN113070358A - Rubber roll adjusting structure of differential stretching mechanism

Info

Publication number: CN113070358A
Application number: CN202110350468.3A
Authority: CN
Inventors: 邵雳; 杨东
Original assignee: Svolt Energy Technology Wuxi Co Ltd
Current assignee: Svolt Energy Technology Wuxi Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-07-06
Anticipated expiration: 2041-03-31
Also published as: CN113070358B

Abstract

The invention provides a rubber roller adjusting structure of a differential stretching mechanism, which is used for adjusting a rubber roller matched with a differential roller. The rubber roller adjusting structure comprises a shifting unit, a rubber roller base body and a fine adjusting unit. Wherein, the shifting unit is arranged on the body of the differential stretching mechanism and is provided with a guide driving part which is controlled and can act; the rubber roller base body is arranged on the machine body and can be driven by the guide driving part to slide on the machine body, and the rubber roller is arranged on the rubber roller base body in a height-adjustable manner through the rubber roller seat. The fine adjustment unit is arranged between the rubber roller seat and the roller shaft of the rubber roller and is configured to adjust the front and back positions of the rubber roller relative to the rubber roller seat. The rubber roller adjusting structure of the differential stretching mechanism adjusts the horizontal position, the height and the front and back positions of the rubber roller through the reasonable configuration of the adjusting parts, thereby well realizing the adjustment of the rubber roller in multiple directions and positions.

Description

Rubber roll adjusting structure of differential stretching mechanism

Technical Field

The invention relates to the technical field of rolling equipment, in particular to a rubber roller adjusting structure of a differential stretching mechanism.

Background

In the existing roller press equipment, a multi-stage drawing mechanism is mainly used for replacing a common drawing mechanism, the problems of pole belt wrinkles and belt breakage of a battery pole piece are solved, and the effect is more obvious especially for an extremely thin foil type pole piece (for example, the thickness of an Al foil is less than or equal to 8 microns). In the roll squeezer equipment, a main driving roll, a swing roll, a tension roll, a two-stage (group) or three-stage (group) differential stretching mechanism and a plurality of passing rolls for polar belt steering are generally arranged; wherein, every grade (group) differential stretching mechanism contains a plurality of sets and mutually supports differential roller and the rubber roll in order to centre gripping utmost point area, because the differential roller rotational speed in the adjacent two-stage differential stretching mechanism is different, and the differential roller rotational speed that utmost point area marchd the place ahead is faster to form the tensile to utmost point area.

In the operation process of the equipment, aiming at different conditions such as the entering position and the thickness of the polar belt, the horizontal position and the height of the rubber roller need to be correspondingly adjusted, and the rubber roller needs to be ensured to have an accurate angle posture so as to be well matched with the differential roller to form the clamping of the polar belt and prevent the polar belt from being deformed and damaged due to the bias voltage of the polar belt.

Due to the limitation of space, the existing differential stretching mechanism adopts a manual stirring adjustment mode, and the adjustment of the rubber roller adopts a simple jackscrew, so that the operation is very inconvenient. The difficulty of the multi-stage stretching lies in the debugging of the mechanism, which mainly comprises tension adjustment, speed difference and position adjustment of a differential mechanism between groups, position adjustment of rubber rollers in the groups and the like, and each fine adjustment can directly influence the folding effect and the strip breakage rate of the rolled pole piece.

At present, a multistage stretching mechanism mostly adopts a dovetail groove slide rail mode to match with a jackscrew and the like to adjust the position of a rubber roller, so that large errors exist, the repeatability is poor, the workload of debugging can be greatly increased, and the instability of a polar belt stretching effect is caused. Moreover, the installation method of the rubber roller per se is not enough for maintenance, a mode of reserving a maintenance opening at the lower part is adopted, a simple screw jacking mechanism is adopted to finely adjust the position of the rubber roller, and the maintenance, the disassembly and the adjustment are very inconvenient.

Disclosure of Invention

In view of this, the present invention is directed to provide a rubber roller adjusting structure of a differential stretching mechanism, so as to achieve multi-directional adjustment of a rubber roller in the differential stretching mechanism.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the utility model provides a differential stretching mechanism's rubber roll adjustment structure for adjustment and differential roller complex rubber roll, this rubber roll adjustment structure includes:

a shifting unit which is arranged on the machine body of the differential stretching mechanism and is provided with a guide driving part which is controlled and can move;

the rubber roller base body is arranged on the machine body and can be driven by the guide driving part to slide on the machine body, and the rubber roller is arranged on the rubber roller base body in a height-adjustable manner through the rubber roller seat;

and the fine adjustment unit is arranged between the rubber roller seat and the roller shaft of the rubber roller and is configured to adjust the front and back positions of the rubber roller relative to the rubber roller seat.

Furthermore, the rubber roller base body is provided with an adjusting part, one end of the adjusting part pushes the rubber roller base, and the height of the adjusting part is variable due to operation, so that the height of the rubber roller is adjusted.

Furthermore, the adjusting parts are respectively arranged on the left side and the right side of the rubber roller seat.

Further, the adjusting portion comprises a support fixedly arranged on the rubber roller base body and a jackscrew screwed on the support, and the jackscrew is pushed on the rubber roller base.

Furthermore, one side of the rubber roller seat is provided with a rubber roller access hole.

Further, the guide driving part comprises a lead screw, and the rubber roll base body is sleeved on the lead screw in a threaded manner.

Furthermore, the shifting unit is provided with a hand wheel for driving the lead screw to rotate, and the rotation axis of the hand wheel is perpendicular to the lead screw.

Furthermore, the end part of the roll shaft is inserted into the shaft hole of the rubber roller seat, and at least one end of the roll shaft is in clearance fit with the shaft hole; the fine adjustment unit comprises a wedging body which can be wedged between the roll shaft and the shaft hole, the wedging depth of the wedging body is adjustable, and a locking structure which is used for locking the position of the roll shaft is arranged on the rubber roll seat.

Further, the fine adjustment unit comprises a fixed block arranged on the rubber roller seat, and the wedging body is in threaded connection with the fixed block; the locking structure comprises a locking jackscrew which is screwed on the rubber roll seat, and the locking jackscrew can tightly support the roll shaft.

Further, the locking jackscrew and the wedging body are respectively arranged on two opposite sides of the roll shaft.

Compared with the prior art, the invention has the following advantages:

the rubber roll adjusting structure of the differential stretching mechanism realizes the adjustment of the height of the rubber roll by configuring the shifting unit to adjust the horizontal position of the rubber roll and utilizing the height adjustment of the rubber roll seat relative to the rubber roll base body, and simultaneously, the fine adjusting unit is arranged to adjust the front and back positions and angles of the rubber roll on the rubber roll seat, thereby realizing the adjustment of the rubber roll in multiple directions and positions.

Meanwhile, the mode that the adjusting part pushes the rubber roller seat is adopted, the height position of the rubber roller seat on the rubber roller base body is adjusted, and accurate fine adjustment can be achieved. And all set up the adjustment portion in the both sides of rubber roll seat, through giving the adjustment portion of both sides with different adjustment height, can change the levelness of rubber roll to the realization is to the correction of rubber roll luffing angle.

In addition, the screw rod is used as the guide driving part to drive the rubber roller base body to translate, so that the rubber roller base body has good stability, the translation position is more accurate, and the repeated consistency is high. The hand wheel and the lead screw are arranged in a crossed manner through the bevel gear, so that the hand wheel is conveniently arranged above the lead screw, and a good operation space is provided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the invention, and the description is given by way of example only and without limitation to the terms of relative positions. In the drawings:

fig. 1 is a schematic overall structure diagram of a differential stretching mechanism according to a first embodiment of the present invention;

FIG. 2 is a schematic view of the overall assembly structure of the rubber roller in the differential stretching mechanism according to the first embodiment of the present invention;

FIG. 3 is a front view of a single glue roll assembly according to a first embodiment of the invention;

FIG. 4 is a side view of a single glue roller assembly according to a first embodiment of the invention;

FIG. 5 is a schematic cross-sectional view taken along line A-A of FIG. 3;

description of reference numerals:

1. a differential roller; 100. a body;

2. a rubber roller; 200. a roller body; 201. a roll shaft;

3. a rubber roll base body; 300. a rubber roller seat; 301. a fastener; 302. a rubber roller access hole; 303. a shaft hole; 304. a translation plate; 31. an adjustment part; 311. a support; 312. carrying out top thread; 32. a cylinder; 321. a floating joint; 322. a fixing plate;

4. a shift unit; 400. a guide driving section; 401. a hand wheel; 402. a guide bar; 403. a bevel gear; 404. A locking handle; 405. a locking block; 406. a position display;

5. a fine adjustment unit; 501. a wedging body; 502. a fixed block; 503. locking the jackscrew; 6. a polar band.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example one

The embodiment relates to a rubber roll adjusting structure of a differential stretching mechanism, which is used for adjusting the position and the posture of a rubber roll matched with a differential roll and realizing multidirectional adjustment of the rubber roll in the differential stretching mechanism. The rubber roll adjusting structure of the differential stretching mechanism comprises a shifting unit, a rubber roll base body and a fine adjusting unit. Wherein, the shifting unit is arranged on the body of the differential stretching mechanism and is provided with a guide driving part which is controlled and can act; the rubber roller base body is arranged on the machine body in a guiding and sliding manner and can be driven by the guiding and driving part to slide on the machine body, and the rubber roller is arranged on the rubber roller base body in a height-adjustable manner through the rubber roller seat. The fine adjustment unit is arranged between the rubber roller seat and the roller shaft of the rubber roller and is configured to adjust the front and back positions of the rubber roller relative to the rubber roller seat.

Based on the above design concept, an exemplary structure of the rubber roller adjusting structure of the differential stretching mechanism of the embodiment is shown in fig. 1.

It is noted that the differential stretching mechanism is usually arranged on a roller press device, and the roller press device is a device for rolling and stretching the pole belt 6 of the battery pole piece, and generally comprises a main driving roller, a swing roller, a tension roller, a two-stage (group) or three-stage (group) differential stretching mechanism and a plurality of passing rollers for turning the pole belt. The differential stretching mechanism realizes the stretching treatment of the polar belt 6 between the differential stretching mechanisms at all levels through the arrangement of different rotating speeds of the differential rollers 1 in the mechanisms at all levels.

As shown in fig. 1, a plurality of sets of rubber rollers 2 are generally arranged in each set of differential stretching mechanism, and each rubber roller 2 is clamped and matched with the same set of differential rollers 1 to process a plurality of polar belts 6. Aiming at the difference of the position of the pole belt 6 entering the equipment, the thickness of the pole belt 6 and the like, the position of the pole belt 6 needs to be adjusted to be positioned right above the pole belt 6 and keep a reasonable thickness gap with the differential roller 1. The rubber roller adjusting structure of the embodiment is just for conveniently adjusting the position of the rubber roller 2.

As shown in fig. 1 and 2, the shift unit 4 is used to adjust the position of the rubber roller 2 in the horizontal direction, and can be translated in the left-right direction as shown in fig. 1 to correspond to the pole belt 6 entering at different positions. The shifting unit 4 is mounted on the machine body 100 of the device as well as the differential stretching mechanism, and is provided with a guide driving part 400 which can be operated and controlled, and when the shifting unit 4 is operated, the guide driving part 400 acts to form a driving force for driving the rubber roller 2 to translate.

Although the guide driving part 400 may be implemented by a push-pull rod, a jack screw, or the like, in order to provide the adjustment accuracy, in the present embodiment, the guide driving part 400 is implemented by a screw structure and is provided with a hand wheel 401 for driving the screw to rotate. Specifically, a rubber roller base body 3 is arranged in an assembly for carrying the rubber roller 2, the rubber roller base body 3 is guided to be arranged on the machine body 100 through a guide rod 402 arranged in parallel with a screw rod, and the rubber roller 2 is arranged on the rubber roller base body 3 through a rubber roller seat 300. Wherein, the rubber roll foundation body 3 spiro union cover is located on the lead screw, and along with the rotation of lead screw, the rubber roll foundation body 3 can take the rubber roll 2 translation. The lead screw is used as the guide driving part 400 to drive the rubber roller base body 3 to translate, so that the rubber roller base body has good stability, the translation position is more accurate, the position precision of repeated movement is good, and the consistency is high.

The displacement unit 4 also has a hand wheel 401 therein for driving the screw to rotate, and preferably, the rotation axis of the hand wheel 401 is arranged perpendicular to the screw. So that the handwheel 401 can be arranged above the lead screw to have a good operating space. With this arrangement, the drive connection between the hand wheel 401 and the lead screw may be achieved by a pair of bevel gears 403.

In addition, in order to lock the screw rod in time after the rubber roll foundation body 3 is adjusted in place in a translation manner, a locking handle 404 can be arranged at the hand wheel 401, the locking handle 404 drives the locking block 405 to block the hand wheel 401, and the screw rod is prevented from rotating automatically under the vibration condition to cause the displacement of the rubber roll foundation body 3. Meanwhile, a position display 406 can be additionally arranged on the hand wheel 401 to display a specific numerical value of the translation position of the rubber roll base body 3, the position display 406 can be an electronic display, and the translation position of the rubber roll base body 3 can be obtained by measuring the total rotation angle of the lead screw or the hand wheel 401 and then converting the total rotation angle; alternatively, the handwheel 401 may be marked directly with a scale and assisted by a pointer.

When the thickness of the polar belt 6 changes, the height of the rubber roller 2 needs to be adjusted so as to change the thickness gap between the rubber roller 2 and the differential roller 1. As shown in fig. 3 and 4, in the embodiment, the rubber roller holder 300 of the rubber roller 2 is mounted on the rubber roller base body 3 in a height-adjustable manner, so that the height position of the rubber roller holder 300 is adjusted, and the height position of the rubber roller 2 is further changed.

Of course, the height position of the rubber roller base 300 installed on the rubber roller base body 3 can be adjusted by various ways, and a preferred technical solution of the present embodiment is shown below.

In the assembly of the rubber roller 2, the rubber roller base body 3 serves as an installation base and has a main body part which is guided to slide on the guide rod 402 and is simultaneously screwed and sleeved on the screw rod. A translation plate 304 is secured to the body portion for mounting the various components of the assembly. Specifically, a fixed plate 322 and a rubber roller seat 300 are fixedly arranged on the translation plate 304, an air cylinder 32 is arranged on the fixed plate 322, and the air cylinder 32 can be a single-acting air cylinder; the output end of the air cylinder 32 is connected with the rubber roller holder 300 through a floating joint 321. The floating joint 321 is provided to allow the rubber roller holder 300 to swing left and right with respect to the cylinder 32. When adjusting the height of the glue roller holder 300, the glue roller holder 300 is first loosely mounted on the glue roller base body 3 by the fastening member 301, and at this moment, the air cylinder 32 will be based on an upward lifting force of the glue roller holder 300, so that the glue roller holder 300 is located at a higher position.

The rubber roller base body 3 of the embodiment is provided with the adjusting part 31, one end of the adjusting part 31 is pushed to the top of the rubber roller base 300, and the height of the adjusting part 31 is changed by operating the adjusting part 31, so that the pushing rubber roller base 300 moves downwards by the lifting force of the air cylinder 32, and the height of the rubber roller 2 can be adjusted.

Specifically, the adjusting portion 31 includes a bracket 311 fixedly disposed on the rubber roll base body 3 or the fixing plate 322, and a jackscrew 312 vertically disposed and screwed on the bracket 311, and the jackscrew 312 is rotated to move down, and the bottom of the jackscrew 312 pushes the rubber roll base 300, so that the height of the rubber roll base 300 can be adjusted, and further the height of the rubber roll 2 can be changed. The top screw structure is adopted to realize the top pushing operation of the rubber roller seat 300, and the rubber roller seat has the characteristics of convenient control and stable structure and can realize relatively accurate fine adjustment.

The above-mentioned adjusting parts 31 may be one or more, and preferably, a plurality of adjusting parts 31 are respectively provided at the left and right sides of the rubber roller holder 300. Adjusting parts 31 are arranged on two sides of the rubber roller seat 300, and the levelness of the rubber roller seat 300 can be changed by giving different adjusting heights to the adjusting parts 31 on the two sides, so that the adjustment and correction of the up-and-down swinging angle of the rubber roller 2 are realized. Therefore, when the rubber roller 2 deviates from the horizontal posture and causes poor extrusion to the polar belt 6, the rubber roller 2 can be corrected back to the horizontal state parallel to the axial direction of the differential roller 1 by adjusting the adjusting part 31.

As shown in fig. 5, in order to adjust the rubber roller 2 in the front-back direction, a fine adjustment unit 5 is disposed between the rubber roller 2 and the rubber roller holder 300. The rubber roller 2 comprises a roller shaft 201 and a roller body 200 sleeved on the roller shaft 201 through a bearing, and the roller body 200 directly participates in clamping and stretching operation of the antipodal belt 6. The end part of the roller shaft 201 is inserted into the shaft hole 303 of the rubber roller base 300, and at least one end of the roller shaft 201 is in clearance fit with the corresponding shaft hole 303. The fine adjustment unit 5 comprises a wedging body 501, the wedging body 501 can be wedged between the roller shaft 201 and the shaft hole 303 which are at one end of the clearance fit, the wedging depth of the wedging body 501 can be adjusted, the wedging depth of the wedging body 501 is different, and the roller shaft 201 can correspondingly change different angles and postures.

It should be noted that two fine adjustment units 5 may be arranged, and are respectively located at two ends of the roller shaft 201, and the two ends of the corresponding roller shaft 201 are in clearance fit; it is also possible to provide a fine adjustment unit 5 only at one end, which serves as an adjustment end; and the other end of the roller shaft 201 is inserted in the shaft hole 303 as a reference side in a non-clearance fit manner. Specifically, the fine adjustment unit 5 includes a fixing block 502 provided on the blanket cylinder holder 300, and the wedge 501 may be configured as a jack screw screwed on the fixing block 502, and a head of the jack screw is configured in a tapered shape to wedge a gap between the roller shaft 201 and the shaft hole 303. Meanwhile, a locking structure should be arranged between the rubber roller holder 300 and the roller shaft 201 to lock the roller shaft 201 after the roller shaft 201 is adjusted to a correct back-and-forth swing angle. The locking structure may take the form of a jackscrew. For example, a locking jackscrew 503 capable of penetrating into the shaft hole 303 is screwed on the rubber roller base 300, and the locking jackscrew 503 is abutted against the roller shaft 201.

The angle of the roll shaft 201 can be finely adjusted by adopting a mode that the wedging body 501 is wedged into a gap between the roll shaft 201 and the shaft hole 303, and the device has the characteristics of simple structure and convenience in operation; with the configuration of the locking structure, the roller shaft 201 which is adjusted in place can be locked on the rubber roller seat 300 in time; the wedging body 501 is provided with the fixing block 502, and the wedging depth of the wedging body 501 can be accurately controlled in a screwing mode, so that the accuracy of fine adjustment of the roll shaft 201 is improved.

Further, it is preferable that the locking jack 503 and the wedge 501 are disposed on opposite sides of the roller shaft 201, i.e., front and rear sides of the adjustment end of the roller shaft 201. Therefore, the rubber roller 2 can be efficiently adjusted in the front-back swinging angle, so that the rubber roller 2 and the differential roller 1 are kept in a parallel arrangement posture. In addition, the wedge 501 and the locking jack 503 are separately provided on both sides of the roller shaft 201, and the roller shaft 201 is locked by being sandwiched therebetween, so that the locking mechanism has an advantage of convenience in operation, and the position of the roller shaft 201 adjusted in the forward and backward swinging direction thereof can be satisfactorily maintained.

In addition, as shown in fig. 3, a rubber roller access hole 302 is formed through the front side or the rear side of the rubber roller holder 300, so as to facilitate observation of the condition of the rubber roller 2 and facilitate access, detachment and replacement of the rubber roller 2.

The rubber roll adjusting structure of the differential stretching mechanism described in this embodiment adjusts the horizontal position of the rubber roll 2 by configuring the shifting unit 4, and realizes the adjustment of the height of the rubber roll 2 by utilizing the height adjustment of the rubber roll base 300 relative to the rubber roll base body 3, and meanwhile, the fine adjustment unit 5 is provided to adjust the front and rear positions and angles of the rubber roll 2 on the rubber roll base 300, so that the adjustment of the multiple directions and positions of the rubber roll 2 can be realized.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A rubber roller adjustment structure of a differential speed stretching mechanism, in order to adjust the rubber roller (2) matched with the differential speed roller (1), it is characterized in that, the rubber roller adjustment structure comprises:

a displacement unit (4), which is arranged on the body (100) of the differential stretching mechanism, and has a guide driving part (400) that can be manipulated and actuated;

The rubber roller base body (3) is arranged on the body (100) and can be driven by the guide driving part (400) to slide on the body (100). The rubber roller (2) is glued The roller seat (300) is mounted on the rubber roller base body (3) in a height-adjustable manner;

A fine-tuning unit (5) is arranged between the rubber roller seat (300) and the roller shaft (201) of the rubber roller (2), and is configured to constitute a pair of the rubber roller (2) relative to the rubber roller (2). Adjustment of the front and rear positions of the rubber roller seat (300).

2. The rubber roller adjustment structure of the differential stretching mechanism according to claim 1, characterized in that: the rubber roller base body (3) is provided with an adjustment part (31), and the adjustment part (31) is provided with an adjustment part (31). One end is pushed on the rubber roller seat (300), and the height of the adjusting portion (31) is variable due to being manipulated, so as to adjust the height of the rubber roller (2).

3 . The rubber roller adjustment structure of the differential stretching mechanism according to claim 2 , wherein the adjustment parts ( 31 ) are respectively provided on the left and right sides of the rubber roller seat ( 300 ). 4 .

4. The rubber roller adjustment structure of the differential stretching mechanism according to claim 2, wherein the adjustment part (31) comprises a bracket (311) fixed on the rubber roller base body (3), and A jacking wire (312) screwed on the bracket (311), and the jacking wire (312) is pushed on the rubber roller seat (300).

5. The rubber roller adjustment structure of the differential stretching mechanism according to claim 1, characterized in that: one side of the rubber roller seat (300) is provided with a rubber roller inspection port (302).

6. The rubber roller adjustment structure of the differential stretching mechanism according to claim 1, characterized in that: the guide driving part (400) comprises a lead screw, and the rubber roller base body (3) is threadedly sleeved on the on the screw.

7 . The rubber roller adjustment structure of the differential stretching mechanism according to claim 6 , wherein the shift unit ( 4 ) has a hand wheel ( 401 ) for driving the lead screw to rotate, and the The rotation axis of the handwheel (401) is perpendicular to the lead screw.

8. The rubber roller adjustment structure of the differential stretching mechanism according to any one of claims 1-7, wherein the end of the roller shaft (201) is inserted into the rubber roller seat (300). ) in the shaft hole (303) of the roller shaft (201), and at least one end of the roller shaft (201) is in clearance fit with the shaft hole (303); the fine adjustment unit (5) includes a roller shaft (201) that can be wedged in ) and the wedging body (501) between the shaft hole (303), the wedging depth of the wedging body (501) is adjustable, and the rubber roller seat (300) is provided with a locking The locking structure for the position of the roller shaft (201).

9. The rubber roller adjustment structure of the differential stretching mechanism according to claim 8, wherein the fine adjustment unit (5) comprises a fixing block (502) arranged on the rubber roller seat (300), The wedging body (501) is screwed on the fixing block (502); the locking structure includes a locking top wire (503) screwed on the rubber roller seat (300), and the The locking top wire (503) can be pressed against the roller shaft (201).

10. The rubber roller adjustment structure of the differential stretching mechanism according to claim 9, characterized in that: the locking top wire (503) and the wedging body (501) are placed separately on the roller shaft (501). 201) on the opposite sides.