Rigid supporting device of roller rocker arm in ring spinning frame

Abstract

The utility model discloses a rigid supporting device of a middle roller rocker arm of a ring spinning frame, which comprises a mounting plate, two rocker arms are arranged above the mounting plate, middle rollers are arranged at the tail ends of the two rocker arms, a supporting assembly is arranged on the surface of the mounting plate, and the supporting assembly comprises a sleeve, a connecting rod and a connecting rod, the number of the devices is two. According to the rigid supporting device of the roller rocker arm in the ring spinning frame, the first bevel gear, the second bevel gear, the lead screw, the transverse column, the lead screw nut, the supporting column, the supporting block and the pressure sensor are matched, so that the rocker arm is rigidly supported; the problems that after a rocker arm in an existing ring spinning frame drives a middle roller to move, due to the fact that the rocker arm is not supported, yarn can drive the middle roller to shake, the rocker arm shakes accordingly, and the working effect of the existing ring spinning frame is reduced are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a ring spinning frame technical field, concretely is a rigid support device of roller rocker arm in ring spinning frame. BACKGROUND

[0002] Ring spinning frame is a kind of machine commonly used in textile industry, mainly for processing fiber material into spun yarn, it is composed of yarn spindle, yarn feeder, transmission system, main motor, belt pulley and rack etc., wherein, yarn spindle is the core component of ring spinning frame, it is composed of spindle tube, spindle shaft, ring and spindle head etc.

[0003] The existing ring spinning frame when in use, through the movement of rocker arm, to drive the middle roller to move, to pull and compact fabric, improve the weaving effect;

[0004] But, the rocker arm in the existing ring spinning frame inside after driving middle roller moves, since not supporting rocker arm, lead to in the ring spinning frame when working, yarn can drive middle roller to sway, thereby leading to rocker arm also sway, thereby reduced the working effect of existing ring spinning frame. UTILITY MODEL CONTENTS

[0005] In view of the deficiency of prior art, the utility model provides a rigid support device of roller rocker arm in ring spinning frame, solve the problem that the rocker arm in the existing ring spinning frame inside after driving middle roller moves, since not supporting rocker arm, lead to in the ring spinning frame when working, yarn can drive middle roller to sway, thereby leading to rocker arm also sway, thereby reduced the working effect of existing ring spinning frame.

[0006] In order to achieve the above object, the utility model discloses a rigid support device of roller rocker arm in ring spinning frame through the following technical scheme: a kind of rigid support device of roller rocker arm in ring spinning frame, including mounting plate, the top of mounting plate is provided with rocker arm, the number of rocker arm is two, the end of two rocker arm is provided with middle roller, the surface of mounting plate is provided with support assembly, support assembly includes: sleeve, it is provided with two, and it is fixedly connected on the surface of mounting plate;Cross bar is rotatably connected on the inner wall of two sleeve by bearing;First bevel gear is provided with two, and is fixedly connected on the outer wall of cross bar;Second bevel gear is provided with two, and is engagedly connected on the top of two first bevel gear;Lead screw is provided with two, and is fixedly connected on the top of two second bevel gear;Lead screw nut is provided with two, and is threadedly connected on the outer wall of two lead screw;Support column is provided with two, and is fixedly connected on the outer wall of two lead screw nut, and is sleeved on the inner wall of two sleeve;More unit is provided with two groups, and is provided on the outer wall of rocker arm;Wherein, first bevel gear is driven under the cross bar, so that second bevel gear drives the rotation of lead screw, so as to drive lead screw nut drive support column moves in sleeve, and the rocker arm is rigidly supported, and the middle roller is replaced quickly by more unit.

[0007] Preferably, the more unit includes: hollow column, provided with two, are inserted in the two ends of the middle roller;Connecting column, provided with two, are rotatably connected on the outer wall of two hollow columns by bearing;Connecting plate is fixedly connected on the outer wall of connecting column;Double head screw respectively penetrates connecting plate and two rocker arms;Nut is threadedly connected on the outer wall of double head screw;Wherein, the nut is rotated out of double head screw, and double head screw is taken out from the rocker arm, so that the connecting column is moved, and then the hollow column is taken out from the two ends of the middle roller, and is replaced.

[0008] Preferably, the connecting column is fixedly connected with a sliding block on the side close to the rocker arm, a sliding groove is slidably connected to the outer wall of the sliding block, and the sliding groove is opened in the inner wall of the rocker arm.

[0009] Preferably, the inner wall of the sleeve is fixedly connected with a cross column, the cross column is rotatably connected to the outer wall of the lead screw by a bearing, the top of the support column is fixedly connected with a support block, and the inner wall of the support block is fixedly connected with a pressure sensor by a bolt.

[0010] Preferably, the initial end of the cross bar is fixedly connected with a second motor, and the second motor is fixedly connected to the surface of the mounting plate by a motor base.

[0011] Preferably, a first motor is fixedly connected to the surface of the mounting plate via a motor mount, a rotating shaft is fixedly connected to the output shaft of the first motor, a vertical column is rotatably connected to the outer wall of the rotating shaft via a bearing, the bottom of the vertical column is fixedly connected to the surface of the mounting plate, and the outer wall of the rotating shaft is fixedly connected to the inner wall of the rocker arm.

[0012] This utility model has the following beneficial effects: The rigid support device for the rocker arm of the ring spinning frame achieves rigid support for the rocker arm through the cooperation of the crossbar, the second motor, the first bevel gear, the second bevel gear, the lead screw, the cross column, the lead screw nut, the support column, the support block, and the pressure sensor. This solves the problem that in existing ring spinning frames, after the rocker arm has moved the middle roller, there is no support for the rocker arm, which causes the yarn to shake the middle roller during operation, resulting in the rocker arm shaking as well, thus reducing the working efficiency of the existing ring spinning frame.

[0013] By utilizing the cooperation between the nut, double-ended screw, connecting plate, connecting column, slider, slide groove, and hollow column, the middle roller can be quickly replaced. This solves the problem that when the middle roller is damaged, it requires manual replacement, which is troublesome and makes it difficult to quickly replace the damaged middle roller. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 An exterior schematic diagram;

[0016] Figure 3 for Figure 1 Structural diagram of the middle roller, mounting plate, and support column;

[0017] Figure 4 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 5 for Figure 1 Enlarged view at point B in the middle;

[0019] Figure 6 for Figure 3 A schematic diagram of the structure of the central support column, support block, and central roller.

[0020] In the figure: 1, mounting plate; 2, rocker arm; 21, first motor; 22, rotating shaft; 23, vertical column; 3, middle roller; 4, support assembly; 41, crossbar; 411, second motor; 42, first bevel gear; 43, second bevel gear; 44, lead screw; 441, horizontal column; 45, lead screw nut; 46, support column; 461, support block; 462, pressure sensor; 47, sleeve; 48, replacement unit; 481, nut; 482, double-headed screw; 483, connecting plate; 484, connecting column; 4841, sliding block; 4842, sliding groove; 485, hollow column. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] The existing ring spinning frame internal rocker arm drives the middle roller to move, and after the movement is completed, the rocker arm is not supported, so that when the ring spinning frame works, the yarn may drive the middle roller to shake, thereby causing the rocker arm to shake, and thus the working effect of the existing ring spinning frame is reduced.

[0023] Therefore, the utility model provides a rigid support device for the middle roller rocker arm of a ring spinning frame, which realizes rigid support of the rocker arm through cooperation between the crossbar, the second motor, the first bevel gear, the second bevel gear, the lead screw, the horizontal column, the lead screw nut, the support column, the support block and the pressure sensor, solves the problem that the existing ring spinning frame internal rocker arm drives the middle roller to move, and after the movement is completed, the rocker arm is not supported, so that when the ring spinning frame works, the yarn may drive the middle roller to shake, thereby causing the rocker arm to shake, and thus the working effect of the existing ring spinning frame is reduced.

[0024] Through the personnel in the art, the power supply matched with the electrical components in the case is connected through wires, and appropriate controllers and encoders should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should be completed according to the working order between the electrical components in the working principle. The detailed connection means is a common technology in the art. The working principle and process are mainly introduced below, and the electrical control is not described.

[0025] Example 1, by Figures 1-6It can be known that the rigid support device of the roller rocker arm of the ring spinning frame in the case, including the mounting plate 1, the surface of the mounting plate 1 is provided with the mounting hole, the number of the mounting hole is four, evenly distributed on both sides of the mounting plate 1, the shape of the mounting hole is circular, the staff installs the rocker arm 2 to the ring spinning frame through the mounting hole on the mounting plate 1, the upper of the mounting plate 1 is provided with the rocker arm 2, the number of the rocker arm 2 is two, the end of the two rocker arms 2 is provided with the middle roller 3, the rocker arm 2 drives the middle roller 3 to move, draws and compacts the fabric, the surface of the mounting plate 1 is provided with the support assembly 4, the support assembly 4 includes: sleeve 47, provided with two, and is fixedly connected to the surface of the mounting plate 1, cross bar 41, is rotatably connected to the inner wall of the two sleeves 47 through the bearing, first bevel gear 42, provided with two, and is fixedly connected to the outer wall of the cross bar 41, when the middle roller 3 is moved, the cross bar 41 is rotated, the cross bar 41 drives the first bevel gear 42 to rotate, second bevel gear 43, provided with two, and is engagedly connected to the top of the two first bevel gears 42, the two first bevel gears 42 drive the second bevel gear 43 to rotate, lead screw 44, provided with two, and is fixedly connected to the top of the two second bevel gears 43, the two second bevel gears 43 drive the lead screw 44 to rotate, lead screw nut 45, provided with two, and is threadedly connected to the outer wall of the two lead screws 44, the two lead screws 44 drive the lead screw nut 45 to move, support column 46, provided with two, and is fixedly connected to the outer wall of the two lead screw nuts 45, the two lead screw nuts 45 drive the support column 46 to move, and is sleeved in the inner wall of the two sleeves 47, the two support columns 46 move in the sleeve 47, thereby supporting the two rocker arms 2, the change unit 48 is provided with two groups, and is provided on the outer wall of the rocker arm 2, wherein, the first bevel gear 42 is driven by the cross bar 41, so that the second bevel gear 43 drives the lead screw 44 to rotate, thereby driving the lead screw nut 45 to drive the support column 46 to move in the sleeve 47, rigidly supporting the rocker arm, the middle roller 3 is quickly replaced through the change unit 48.

[0026] In the specific implementation process, it is worth pointing out that the surface of the mounting plate 1 is provided with the mounting hole, the number of the mounting hole is four, evenly distributed on both sides of the mounting plate 1, the shape of the mounting hole is circular, the staff installs the rocker arm 2 to the ring spinning frame through the mounting hole on the mounting plate 1, the rocker arm 2 drives the middle roller 3 to move, draws and compacts the fabric, when the middle roller 3 is moved, the cross bar 41 is rotated, the cross bar 41 drives the first bevel gear 42 to rotate, the two first bevel gears 42 drive the second bevel gear 43 to rotate, the two second bevel gears 43 drive the lead screw 44 to rotate, the two lead screws 44 drive the lead screw nut 45 to move, the two lead screw nuts 45 drive the support column 46 to move, the two support columns 46 move in the sleeve 47, thereby supporting the two rocker arms 2, after supporting, the cross bar 41 stops rotating, rigidly supporting the rocker arm 2.

[0027] Further, the replacing unit 48 comprises: hollow columns 485, two are arranged, and are inserted into two ends of the middle roller 3; the two hollow columns 485 are moved, so that the damaged middle roller 3 is taken out from two ends, and the two hollow columns 485 are inserted into two ends of a new middle roller 3; connecting columns 484, two are arranged, and are rotatably connected to the outer walls of the two hollow columns 485 through bearings; connecting plates 483 are fixedly connected to the outer walls of the connecting columns 484; the two connecting columns 484 are moved, and the connecting plates 483 of the connecting columns 484 are moved, so that the two connecting columns 484 are taken down; double-headed screws 482 are respectively penetrated through the connecting plates 483 and the two rocker arms 2; workers rotate the two nuts 481 in sequence, rotate the nuts 481 out of the double-headed screws 482, and then pull the double-headed screws 482 out of the rocker arms 2, so that the fixing of the connecting columns 484 is released; the nuts 481 are threadedly connected to the outer walls of the double-headed screws 482; the two connecting columns 484 are moved and placed back on the rocker arms 2; the workers re-penetrate the double-headed screws 482 into the rocker arms 2, and re-rotate the nuts 481 onto the double-headed screws 482, so that the new middle roller 3 is fixed to the rocker arms 2; wherein the nuts 481 are rotated out of the double-headed screws 482, the double-headed screws 482 are taken out of the rocker arms 2, so that the connecting columns 484 are moved, and then the hollow columns 485 are taken out from two ends of the middle roller 3, and the hollow columns 485 are replaced.

[0028] In the specific implementation process, it is particularly worth pointing out that when the middle roller 3 is damaged, the workers rotate the two nuts 481 in sequence, rotate the nuts 481 out of the double-headed screws 482, and then pull the double-headed screws 482 out of the rocker arms 2, so that the fixing of the connecting columns 484 is released; the two connecting columns 484 are moved, and the connecting plates 483 of the connecting columns 484 are moved, so that the two connecting columns 484 are taken down; the two hollow columns 485 are moved, so that the damaged middle roller 3 is taken out from two ends; the two hollow columns 485 are inserted into two ends of a new middle roller 3; the two connecting columns 484 are moved and placed back on the rocker arms 2; the workers re-penetrate the double-headed screws 482 into the rocker arms 2, and re-rotate the nuts 481 onto the double-headed screws 482, so that the new middle roller 3 is fixed to the rocker arms 2, and the middle roller 3 is quickly replaced.

[0029] Further, the connecting columns 484 are fixedly connected with sliding blocks 4841 on one side close to the rocker arms 2; when the connecting columns 484 are placed back on the rocker arms 2, the connecting columns 484 drive the sliding blocks 4841 to move; sliding grooves 4842 are slidably connected to the outer walls of the sliding blocks 4841; the sliding blocks 4841 are slid into the sliding grooves 4842, so that the connecting columns 484 are limited; and the sliding grooves 4842 are arranged on the inner walls of the rocker arms 2.

[0030] In the implementation process, it is worth pointing out that when the connecting column 484 is placed on the rocker arm 2 again, the connecting column 484 drives the sliding block 4841 to move, and the sliding block 4841 is slid into the sliding groove 4842 to limit the connecting column 484.

[0031] Further, the inner wall of the sleeve 47 is fixedly connected with a cross column 441, the cross column 441 is rotatably connected to the outer wall of the lead screw 44 through a bearing, the cross column 441 supports the lead screw 44, the top of the supporting column 46 is fixedly connected with a supporting block 461, when supporting the rocker arm 2, the supporting column 46 drives the supporting block 461 to move, the supporting block 461 drives the pressure sensor 462 to move, when the supporting block 461 contacts with the rocker arm 2, the pressure sensor 462 also contacts with the rocker arm 2, the inner wall of the supporting block 461 is fixedly connected with the pressure sensor 462 through bolts, at this time, the pressure sensor 462 transmits signals to the controller on the ring spinning frame, the controller controls the supporting assembly 4 to stop working, and accurate control of the supporting assembly 4 to stop moving is realized.

[0032] In the implementation process, it is worth pointing out that the cross column 441 supports the lead screw 44, when supporting the rocker arm 2, the supporting column 46 drives the supporting block 461 to move, the supporting block 461 drives the pressure sensor 462 to move, when the supporting block 461 contacts with the rocker arm 2, the pressure sensor 462 also contacts with the rocker arm 2, at this time, the pressure sensor 462 transmits signals to the controller on the ring spinning frame, the controller controls the supporting assembly 4 to stop working, and accurate control of the supporting assembly 4 to stop moving is realized.

[0033] Further, the initial end of the cross rod 41 is fixedly connected with a second motor 411, the second motor 411 is fixedly connected to the surface of the mounting plate 1 through a motor seat, the staff controls the second motor 411 to rotate through the controller on the ring spinning frame, so as to drive the cross rod 41 to rotate, and make the supporting assembly 4 work, when the controller receives the signal generated by the pressure sensor 462, the controller controls the second motor 411 to stop rotating, and the driving of the supporting assembly 4 to work is realized, the model of the second motor 411 is selected according to actual needs, and work is met.

[0034] In the implementation process, it is worth pointing out that the model of the second motor 411 is selected according to actual needs, and work is met, the staff controls the second motor 411 to rotate through the controller on the ring spinning frame, so as to drive the cross rod 41 to rotate, and make the supporting assembly 4 work, when the controller receives the signal generated by the pressure sensor 462, the controller controls the second motor 411 to stop rotating, and the driving of the supporting assembly 4 to work is realized.

[0035] Specifically, firstly, the operator installs the rocker arm 2 onto the ring spinning machine through the mounting holes on the mounting plate 1. The rocker arm 2 drives the middle roller 3 to move, pulling and pressing the fabric. After the middle roller 3 has moved, the operator controls the controller on the ring spinning machine to control the second motor 411 to rotate, thereby driving the crossbar 41 to rotate. The crossbar 41 drives the first bevel gear 42 to rotate, the two first bevel gears 42 drive the second bevel gears 43 to rotate, the two second bevel gears 43 drive the lead screw 44 to rotate, the two lead screws 44 drive the lead screw nut 45 to move, the two lead screw nuts 45 drive the support column 46 to move, the two support columns 46 move in the sleeve 47, the support column 46 drives the support block 461 to move, the support block 461 drives the pressure sensor 462 to move, and when the support block 461 contacts the rocker arm 2, the pressure sensor 462 also contacts the rocker arm 2. At this time, the pressure sensor 462 transmits a signal to the controller on the ring spinning machine. In the control unit, the controller stops the second motor 411 from rotating to support the rocker arm 2. When the roller 3 is damaged, the operator rotates the nuts 481 on both sides in sequence to rotate the nuts 481 off the double-ended screw 482, then pulls the double-ended screw 482 out of the rocker arm 2, releasing the fixing of the connecting column 484. The two connecting columns 484 are moved, the connecting plate 483 of the connecting column 484 moves, and the two connecting columns 484 are removed. The hollow columns 485 on both sides are then moved. The damaged ends of the middle roller 3 are removed, and two hollow columns 485 are inserted into the ends of the new middle roller 3. The two connecting columns 484 are moved, and the connecting columns 484 drive the slider 4841 to move, so that the slider 4841 slides into the slide groove 4842 and is placed back on the rocker arm 2. The worker then inserts the double-ended screw 482 back into the rocker arm 2, rotates the nut 481 back onto the double-ended screw 482, and fixes the new middle roller 3 onto the rocker arm 2, thus replacing the middle roller 3.

[0036] Example 2, by Figure 1 , 2 As shown in points 3 and 6, the surface of the mounting plate 1 is fixedly connected to the first motor 21 via a motor mount. The operator controls the first motor 21 to rotate by controlling the controller on the ring spinning machine. The model of the first motor 21 is selected according to actual needs, as long as it meets the requirements. The output shaft of the first motor 21 is fixedly connected to the rotating shaft 22. The first motor 21 drives the rotating shaft 22 to rotate. The outer wall of the rotating shaft 22 is rotatably connected to the vertical column 23 via a bearing. The vertical column 23 supports the rotating shaft 22. The bottom of the vertical column 23 is fixedly connected to the surface of the mounting plate 1. The outer wall of the rotating shaft 22 is fixedly connected to the inner wall of the rocker arm 2. The rotating shaft 22 drives the rocker arm 2 to rotate. The two rocker arms 2 drive the middle roller 3 to move. After the middle roller 3 has moved, the controller controls the first motor 21 to stop rotating, thereby driving the middle roller 3 to move.

[0037] In the implementation process, it is worth pointing out that the first motor 21 is selected according to actual needs, and the vertical column 23 supports the rotating shaft 22, and the staff controls the first motor 21 to rotate through the controller on the ring spinning frame, the first motor 21 drives the rotating shaft 22 to rotate, the rotating shaft 22 drives the rocker arm 2 to rotate, and the two rocker arms 2 drive the middle roller 3 to move, and when the middle roller 3 is moved, the controller controls the first motor 21 to stop rotating, and the driving of the middle roller 3 is realized.

[0038] Specifically, the staff controls the first motor 21 to rotate through the controller on the ring spinning frame, the first motor 21 drives the rotating shaft 22 to rotate, the rotating shaft 22 drives the rocker arm 2 to rotate, and the two rocker arms 2 drive the middle roller 3 to move, and when the middle roller 3 is moved, the controller controls the first motor 21 to stop rotating.

[0039] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A rigid support device for the roller rocker arms in a ring spinning frame, comprising a mounting plate (1), characterised in that: The upper side of the mounting plate (1) is provided with rocker arms (2), the number of the rocker arms (2) is two, the ends of the two rocker arms (2) are provided with middle rollers (3), the surface of the mounting plate (1) is provided with support assemblies (4), the support assemblies (4) comprise: The sleeve (47) is provided with two, and is fixedly connected to the surface of the mounting plate (1); The cross rod (41) is rotatably connected to the inner wall of the two sleeves (47) through bearings; The first bevel gear (42) is provided with two, and is fixedly connected to the outer wall of the cross rod (41); The second bevel gear (43) is provided with two, and is meshingly connected to the top of the two first bevel gears (42); The lead screw (44) is provided with two, and is fixedly connected to the top of the two second bevel gears (43); The lead screw nut (45) is provided with two, and is threadedly connected to the outer wall of the two lead screws (44); The support column (46) is provided with two, and is fixedly connected to the outer wall of the two lead screw nuts (45), and is sleeved on the inner wall of the two sleeves (47); The changing unit (48) is provided with two groups, and is arranged on the outer wall of the rocker arm (2); Wherein, the first bevel gear (42) is driven by the cross rod (41), so that the second bevel gear (43) drives the lead screw (44) to rotate, so as to drive the lead screw nut (45) to drive the support column (46) to move in the sleeve (47), rigidly support the rocker arm, and quickly replace the middle roller (3) through the changing unit (48).

2. A rigid support device for a roller rocker arm in a ring spinning frame according to claim 1, characterized in that: The changing unit (48) comprises: The hollow column (485) is provided with two, and is inserted into the two ends of the middle roller (3); The connecting column (484) is provided with two, and is rotatably connected to the outer wall of the two hollow columns (485) through bearings; The connecting plate (483) is fixedly connected to the outer wall of the connecting column (484); The double-headed screw rod (482) penetrates through the connecting plate (483) and the two rocker arms (2) respectively; The nut (481) is threadedly connected to the outer wall of the double-headed screw rod (482); Wherein, the nut (481) is rotated out of the double-headed screw rod (482), the double-headed screw rod (482) is taken out of the rocker arm (2), so as to move the connecting column (484), and then take out the hollow column (485) from the two ends of the middle roller (3) for replacement.

3. A rigid support device for a roller rocker arm in a ring spinning frame according to claim 2, characterized in that: The connecting column (484) is fixedly connected with a sliding block (4841) on the side close to the rocker arm (2), the outer wall of the sliding block (4841) is slidingly connected with a sliding groove (4842), and the sliding groove (4842) is arranged on the inner wall of the rocker arm (2).

4. A rigid support device for a roller rocker arm in a ring spinning frame according to claim 1, characterized in that: The inner wall of the sleeve (47) is fixedly connected with a cross column (441), the cross column (441) is rotatably connected to the outer wall of the lead screw (44) through bearings, the top of the support column (46) is fixedly connected with a support block (461), and the inner wall of the support block (461) is fixedly connected with a pressure sensor (462) through bolts.

5. A rigid support device for a roller rocker arm in a ring spinning frame according to claim 1, characterized in that: The beginning end of the cross bar (41) is fixedly connected with a second motor (411), and the second motor (411) is fixedly connected to the surface of the mounting plate (1) through a motor base.

6. A rigid support device for a roller rocker arm in a ring spinning frame according to claim 1, characterized in that: The surface of the mounting plate (1) is fixedly connected with a first motor (21) through a motor base, the output shaft of the first motor (21) is fixedly connected with a rotating shaft (22), the outer wall of the rotating shaft (22) is rotatably connected with a vertical column (23) through a bearing, the bottom of the vertical column (23) is fixedly connected to the surface of the mounting plate (1), and the outer wall of the rotating shaft (22) is fixedly connected to the inner wall of the rocker arm (2).

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