Reverse tension attenuation double-servo air spring automatic force arm constant tension wire tensioner
By designing a reverse tension attenuation dual servo gas spring automatic force arm constant tension wire tensioner, the tension adjustment component and pressure regulating valve assembly maintain the wire tension test angle, the problem of low detection accuracy and manual adjustment efficiency in traditional tensioners is solved, and automated and high-precision wire tension control is achieved.
Patent Information
- Application Number
- CN202510573723.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2025-07-11
AI Technical Summary
During the winding process of traditional wire tensioners, the swing of the tension rod and tensioner causes changes in the angle between the wire and the pressure sensor, affecting the tension detection accuracy and line feeding speed, and requires manual adjustment, which is inefficient and labor-intensive, so that automated control cannot be achieved.
The reverse tension attenuation dual servo gas spring automatic force arm constant tension wire tensioner is adopted. Through the cooperation of the tension rod adjustment component, the wire tension release drive component and the pressure regulating valve component, the wire tension test angle is maintained within the range of 15 degrees to 25 degrees. The wire tension is controlled by the servo gas spring and solenoid valve to achieve automatic adjustment and constant tension.
It improves the wire tension detection accuracy and stability of wire feeding speed, reduces manual intervention, improves operation simplicity and efficiency, adapts to the needs of hanging and wrapping wires of different coil pins, and solves the accuracy and automation problems of traditional tensioners.
Smart Images
Figure CN120288583A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of wire tensioners, and particularly to an anti-tension attenuation double servo air spring automatic arm constant tension wire tensioner. Background Art
[0002] In traditional wire tensioners, the wire usually passes through the first wire guiding wheel, wool felt clip, wire feeding wheel, second wire guiding wheel, tensioning wheel on the tension rod, pressure sensor, and third wire guiding wheel in sequence. That is, the traditional tensioner first winds the wire around the tensioning wheel on the tension rod and then leads the wire to the pressure sensor for testing the wire tension, and then leads the wire to the winding mechanism for hanging and winding the pins on the coil skeleton and winding the coil. Before winding the coil on the coil skeleton, it is necessary to wind the pins on the skeleton. Since the direction of the wire feeding guide needle for winding the pins on the skeleton is different from that for winding the coil on the skeleton, it is necessary to move and position the wire feeding guide needle before winding the pins so that the pins are opposite to the wire feeding guide needle. The positioning of the guide needle for winding the pins requires a longer wire to cooperate. In this case, it is necessary to lower the tension rod to release the wire to provide a longer wire for the guide needle to meet the need of winding the pins. When the tension rod is lowered, the tension rod and the tensioning wheel of the traditional tensioner will drive the wire to swing, resulting in an increase in the angle between the wire and the vertical plane of the pressure sensor, and the pressure received by the pressure sensor from the wire decreases or even the wire separates from the pressure sensor. This situation will affect the tension detection accuracy of the pressure sensor for the wire, thereby affecting the control of the wire feeding speed of the wire feeding motor driving the wire feeding wheel and the accuracy of adjusting the wire tension; since the tension detected by the pressure sensor for the wire is smaller than the actual tension of the wire, the wire feeding motor does not feed the wire or slows down the wire feeding. After lowering the tension rod to release the wire for the guide needle to feed the wire, the wire is in a shortage state, and the tension rod and the tensioning wheel on it are tightened by the wire and cannot swing upward to reset to the angular position for swinging during the coil winding process to maintain the constant wire tension. During the coil winding, the tensioner cannot work normally, affecting the normal operation of the tensioner; at the same time, it is necessary for workers to manually lower the tension rod to release the wire to supply the wire to the guide needle, which has problems such as low efficiency, difficult operation, increased labor intensity of workers, inability to automatically tension the wire according to different situations of winding the pins and winding the coil, and being not conducive to the requirements of industrial development. Summary of the Invention
[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an anti-tension attenuation double servo air spring automatic arm constant tension wire tensioner.
[0004] To solve the above technical problems, the present invention adopts the following technical solutions: The anti-tension attenuation double-servo air spring automatic force arm constant-tension wire tensioner includes a chassis, a wire tension release drive assembly, a tension rod adjustment assembly, a tension rod assembly, a pressure regulating valve assembly, a confluence assembly, a first wire feeding motor, a second wire feeding motor, a first wire feeding wheel, a second wire feeding wheel, an incoming wire limit block, a wool felt clip assembly, a pressure sensor, a first wire passing wheel, a second wire passing wheel, a third wire passing wheel, a fourth wire passing wheel, a pressure display, a mounting seat and an air pipe joint; The tension rod assembly is installed inside the top of the chassis and is used for tensioning the wire, the tension rod adjustment assembly is installed inside the top of the chassis and is used for controlling the tension rod assembly to release or tighten the wire, and the wire tension release drive assembly is installed inside the chassis and is used for driving the tension rod assembly to forcibly release the wire for wire winding on the hanging feet; The first wire feeding motor and the second wire feeding motor are respectively installed on the inner side wall at one end of the chassis. The first wire feeding wheel is installed on the output shaft of the first wire feeding motor and is located on the outer side wall at the same end of the chassis. The second wire feeding wheel is installed on the output shaft of the second wire feeding motor and is located on the outer side wall at the same end of the chassis; The incoming wire limit block, the first wire passing wheel, the wool felt clip assembly, the second wire passing wheel, the pressure sensor, the third wire passing wheel, the fourth wire passing wheel and the pressure display are respectively installed on the outer side wall at one end of the chassis. The pressure display, the first wire feeding wheel, the third wire passing wheel and the fourth wire passing wheel are located at the top of the outer side wall of the chassis and the fourth wire passing wheel is located above the third wire passing wheel. The incoming wire limit block and the second wire feeding wheel are located at the bottom of the outer side wall. The third wire passing wheel and the fourth wire passing wheel are located on one side of the first wire feeding wheel. The second wire feeding wheel is located on the same side and below the first wire feeding wheel. The incoming wire limit block is located on the other side and below the first wire feeding wheel. The first wire passing wheel and the wool felt clip assembly are located between the incoming wire limit block and the first wire feeding wheel. The second wire passing wheel and the pressure sensor are located between the second wire feeding wheel and the third wire passing wheel; The pressure regulating valve assembly is installed at the bottom of the chassis and is used for regulating the air pressure. The confluence assembly is installed inside the chassis and is used for gas confluence. The mounting seat is installed at the bottom of the chassis and is used for fixing the chassis. The air pipe joint is installed at the bottom of the chassis.
[0005] By adopting the above technical solution, the wire can adjust the tension test angle at which it is pressed against the pressure sensor through the second wire passing wheel and the third wire passing wheel, so that the wire tension test angle is maintained within the optimal tension test angle range of 15 degrees to 25 degrees. This tension test angle range avoids the wire being driven to swing during the swinging process of the tension rod assembly, resulting in a large range change in the tension test angle between the wire and the pressure sensor, which affects the tension test accuracy of the pressure sensor for the wire. It improves the accuracy of the first wire feeding motor and the second wire feeding motor to drive the first wire feeding wheel and the second wire feeding wheel respectively to adjust the wire feeding speed to keep the wire tension constant, and solves the problem that the tension rod and the tension wheel of the traditional tensioner drive the wire to swing, resulting in an increase in the angle between the wire and the vertical plane of the pressure sensor, and the pressure received by the pressure sensor from the wire decreases or even the wire is separated from the pressure sensor, which affects the control of the wire feeding speed of the wire feeding motor driving the wire feeding wheel and the accuracy of adjusting the wire tension.
[0006] Preferably, the tension rod assembly includes a tension adjustment support, a tension rod, a wire outlet wheel, a tension rod mounting seat, a first rotating shaft, a first stop rod, a second stop rod, a first bearing, a first snap ring, a roller mounting rod and a roller. The tension adjustment support is installed on one side wall of the top of the chassis. The first bearing is installed at the bottom of the tension adjustment support. The first rotating shaft is installed in the first bearing. The tension rod mounting seat is installed at one end of the first rotating shaft. The tension rod is installed on the tension rod mounting seat and swings around the first rotating shaft. The wire outlet wheel is installed at the swinging end of the tension rod. The roller mounting rod is installed at the other end of the first rotating shaft and swings around the first rotating shaft. The roller is installed at the swinging end of the roller mounting rod. The first snap ring is installed on the first rotating shaft. The first bearing axially limits the first rotating shaft through the first snap ring. The first stop rod and the second stop rod are respectively installed on one side of the upper and lower ends of the tension adjustment support and respectively limit the swing of the tension rod.
[0007] Preferably, the tension rod adjusting assembly includes a first tension adjusting driving device, a second tension adjusting driving device, a first mounting plate, a ball screw, a connecting member, a photoelectric inductor, an induction sheet, a tension adjusting substrate, a second bearing, a second rotating shaft, a second snap ring, a connecting seat, a linear guide rail, a third rotating shaft, a first shaft seat, a fourth rotating shaft and a second shaft seat. The second rotating shaft and the connecting seat are integrally formed. The second bearing is installed on the second rotating shaft, and the second snap ring is installed on one end of the second rotating shaft. The second bearing axially positions the second rotating shaft through the second snap ring. One side surface of one end of the tension adjusting substrate is connected and installed with the connecting seat, and the linear guide rail is installed on the other side surface of the tension adjusting substrate. The first shaft seat is installed in the chassis. The first tension adjusting driving device is rotatably connected to the first shaft seat through the third rotating shaft. The second shaft seat is slidably installed on the tension adjusting substrate through the linear guide rail. The output end of the first tension adjusting driving device is rotatably connected to the second shaft seat through the fourth rotating shaft. The second tension adjusting driving device is installed on the other end of the tension adjusting substrate through the first mounting plate. The ball screw is connected and installed with the output end of the second tension adjusting driving device. One end of the connecting member is connected and installed with the second shaft seat, and the other end of the connecting member is in transmission connection with the ball screw.
[0008] Preferably, the wire tension release driving assembly includes a push plate lifting driving device, a second mounting plate and a push plate. The push plate lifting driving device is fixed in the chassis through the second mounting plate, and the push plate is installed on the output end of the push plate lifting driving device.
[0009] Preferably, the busbar assembly includes a busbar, a first solenoid valve and a second solenoid valve. The busbar is installed in the chassis, and the first solenoid valve and the second solenoid valve are respectively installed on the busbar.
[0010] Preferably, the pressure regulating valve assembly includes a pressure regulating valve, a first pressure regulating valve joint, a second pressure regulating valve joint and a pressure regulating valve knob. The pressure regulating valve is installed at the bottom of the chassis. The first pressure regulating valve joint and the second pressure regulating valve joint are respectively installed on both sides of the pressure regulating valve, and the pressure regulating valve knob is installed at the bottom of the pressure regulating valve.
[0011] Preferably, the wool felt clip assembly includes a first clamping plate, a second clamping plate, a clamping plate rotating shaft, an elastic member, a first wool felt clip and a second wool felt clip. The middle parts of the first clamping plate and the second clamping plate are rotatably connected through the clamping plate rotating shaft. One end of the elastic member is connected and installed with one end of the first clamping plate, and the other end of the elastic member is connected and installed with one end of the second clamping plate. The side surface of the other end of the first clamping plate facing away from the second clamping plate is connected and installed with the outer side wall of one end of the chassis. The first wool felt clip is installed on the side surface of the same end of the first clamping plate facing the second clamping plate, and the second wool felt clip is installed on the side surface of the other end of the second plate facing the first clamping plate.
[0012] Preferably, a controller or control system for signal control is built into the pressure display and is respectively connected to components such as the tension rod adjustment component, the wire tension release drive component, the busbar component, the pressure regulating valve component, the first wire feeding motor, and the second wire feeding motor. The controller is a PLC programmable logic controller, and the PLC programmable logic controller can adopt a programmable logic controller with the model number XDS-40T-D, but it is not limited thereto.
[0013] Compared with the existing technology, the beneficial effects of the present invention are as follows: 1. By installing a tension rod adjustment component inside the top of the chassis, a wire tension release drive component, a busbar component inside the chassis, and a pressure regulating valve component at the bottom of the chassis, and designing the structures of the tension rod adjustment component, the wire tension release drive component, the busbar component, and the pressure regulating valve component respectively, and cooperating with other components of the present invention, the overall structural design is suitable for the hanging and winding of various coil pins. It can provide tension-free wires and tensioned wires for the pin hanging and winding. By adjusting the air pressure through the pressure regulating valve component, the output force of the first tension adjustment drive device is adjusted to realize the adjustment of different reverse tensions required for tensioning the wires for pin hanging and winding and coil winding by the tension rod and the wire outlet wheel. By pushing and pulling the second shaft seat by the first tension adjustment drive device, the tension adjustment substrate is driven to swing upward or downward around the second rotating shaft by an appropriate angle, realizing the real-time control of the elevation angle range between the tension rod and the horizontal plane during the wire tensioning and swinging process when hanging and winding the pins and winding the coil. Its function is more perfect, the versatility is stronger, the operation is simpler, the wire tension adjustment efficiency is higher, and the wire tension adjustment is more accurate. It not only solves the problem that in the traditional method, it is necessary to manually lower the tension rod to release the wire to provide a longer wire for the guide pin to meet the need of pin hanging and winding positioning, and the tension rod and the tension wheel of the traditional tensioner drive the wire to swing, resulting in an increase in the angle between the wire and the vertical plane of the pressure sensor, so that the pressure sensor is affected by the wire pressure and decreases or even the wire is separated from the pressure sensor, affecting the wire feeding speed of the control wire feeding motor driving the wire feeding wheel and affecting the accuracy of adjusting the wire tension, but also solves the problem that the traditional tensioner cannot work normally during coil winding because the pressure sensor detects that the tension of the wire is smaller than the actual tension of the wire, the wire feeding motor does not feed the wire or slows down the wire feeding, the wire is in a shortage state after the tension rod is lowered to release the wire, and the tension rod and the tension wheel on it are tightened by the wire and cannot swing upward to reset to the angular position for maintaining the constant wire tension during the coil winding process.
[0014] 2. Through the wire tension release drive component, it realizes the automatic control of lowering the tension rod to release the wire, thus solving the problem that in the traditional tensioner structure, when the wire is relatively thin or the pins on the skeleton are relatively thin and no tension is required for pin hanging and winding, workers need to manually lower the tension rod to provide wire for the guide pin to hang and wind the relatively thin skeleton pins.
[0015] 3. The present invention changes the traditional method of testing the wire tension by first winding the wire around the tension wheel on the tension rod and then leading it to the pressure sensor, avoiding the large change in the tension test angle of the wire on the pressure sensor caused by the swinging of the tension rod driving the wire to swing during the swinging process, which affects the accuracy of the pressure sensor in measuring the wire tension. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] For ease of explanation, the present invention will be described in detail by the following preferred embodiments and accompanying drawings.
[0017] Figure 1 It is a three-dimensional view of an anti-tension attenuation double-servo air spring automatic force arm constant-tension wire tensioner of the present invention.
[0018] Figure 2 It is a three-dimensional view of an anti-tension attenuation double-servo air spring automatic force arm constant-tension wire tensioner of the present invention in different directions.
[0019] Figure 3 It is a three-dimensional view of the tension rod assembly of an anti-tension attenuation double-servo air spring automatic force arm constant-tension wire tensioner of the present invention.
[0020] Figure 4 It is a three-dimensional view of the tension rod assembly of an anti-tension attenuation double-servo air spring automatic force arm constant-tension wire tensioner of the present invention after removing the tension adjustment support, the first stop rod and the second stop rod.
[0021] Figure 5 It is a three-dimensional view of the tension rod adjustment assembly of an anti-tension attenuation double-servo air spring automatic force arm constant-tension wire tensioner of the present invention.
[0022] Figure 6 It is a three-dimensional view of the tension rod adjustment assembly of an anti-tension attenuation double-servo air spring automatic force arm constant-tension wire tensioner of the present invention at different angles.
[0023] Figure 7 It is a three-dimensional view of the wire tension release drive assembly of an anti-tension attenuation double-servo air spring automatic force arm constant-tension wire tensioner of the present invention.
[0024] Figure 8 It is a three-dimensional view of the bus bar assembly of an anti-tension attenuation double-servo air spring automatic force arm constant-tension wire tensioner of the present invention.
[0025] Figure 9 It is a three-dimensional view of the pressure regulating valve assembly of an anti-tension attenuation double-servo air spring automatic force arm constant-tension wire tensioner of the present invention.
[0026] Figure 10A perspective view of the felt clip assembly of an anti-tension attenuation double servo air spring automatic force arm constant tension wire tensioner according to the present invention. Detailed implementation manner
[0027] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.
[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.
[0029] Refer to Figures 1 to 2As shown in the figure, an anti-tension attenuation double servo air spring automatic power arm constant tension wire tensioner of the present invention includes a chassis 1, a wire tension release drive assembly 2, a tension rod adjustment assembly 3, a tension rod assembly 4, a pressure regulating valve assembly 5, a confluence assembly 6, a first wire feeding motor 71, a second wire feeding motor 72, a first wire feeding wheel 81, a second wire feeding wheel 82, an incoming wire limiting block 9, a wool felt clip assembly 10, a first wire passing wheel 11, a second wire passing wheel 12, a third wire passing wheel 13, a fourth wire passing wheel 14, a pressure sensor 15, a pressure display 16, a mounting seat 17, and an air pipe joint 18. The tension rod assembly 4 is installed inside the top of the chassis 1 and is used for tensioning the wire. The tension rod adjustment assembly 3 is installed inside the top of the chassis 1 and is used to control the tension rod assembly 4 to release or tighten the wire. The wire tension release drive assembly 2 is installed inside the chassis 1 and is used to drive the tension rod assembly 4 to forcibly release the wire for wire winding on the hanging foot. The first wire feeding motor 71 and the second wire feeding motor 72 are respectively installed on the inner side wall at one end of the chassis 1. The first wire feeding wheel 81 is installed on the output shaft of the first wire feeding motor 71 and is located on the outer side wall at the same end of the chassis 1. The second wire feeding wheel 82 is installed on the output shaft of the second wire feeding motor 72 and is located on the outer side wall at the same end of the chassis 1. The incoming wire limiting block 9, the first wire passing wheel 11, the wool felt clip assembly 10, the second wire passing wheel 12, the pressure sensor 15, the third wire passing wheel 13, the fourth wire passing wheel 14, and the pressure display 16 are respectively installed on the outer side wall at the same end of the chassis 1. The pressure display 16, the first wire feeding wheel 81, the third wire passing wheel 13, and the fourth wire passing wheel 14 are located at the top of the outer side wall of the chassis 1, and the fourth wire passing wheel 14 is located above the third wire passing wheel 13. The incoming wire limiting block 9 and the second wire feeding wheel 82 are located at the bottom of the outer side wall. The third wire passing wheel 13 and the fourth wire passing wheel 14 are located on one side of the first wire feeding wheel 81. The second wire feeding wheel 82 is located below the same side of the first wire feeding wheel 81. The incoming wire limiting block 9 is located below the other side of the first wire feeding wheel 81. The first wire passing wheel 11 and the wool felt clip assembly 10 are located between the incoming wire limiting block 9 and the first wire feeding wheel 81. The second wire passing wheel 12 and the pressure sensor 15 are located between the second wire feeding wheel 82 and the third wire passing wheel 13. The pressure regulating valve assembly 5 is installed at the bottom of the chassis 1 and is used to regulate the air pressure. The confluence assembly 6 is installed inside the chassis 1 and is used for gas confluence. The mounting seat 17 is installed at the bottom of the chassis 1 and is used to fix the chassis 1. The air pipe joint 18 is installed at the bottom of the chassis 1.
[0030] Refer to Figure 3 and Figure 4As shown in the figure, the tension rod assembly 4 includes a tension adjusting support 41, a tension rod 42, a wire outlet wheel 43, a tension rod mounting seat 44, a first rotating shaft 45, a first stop rod 46, a second stop rod 47, a first bearing 48, a first snap ring 49, a roller mounting rod 40 and a roller 401. The tension adjusting support 41 is installed on one side wall of the top of the chassis 1. The first bearing 48 is installed at the bottom of the tension adjusting support 41. The first rotating shaft 45 is installed in the first bearing 48. The tension rod mounting seat 44 is installed at one end of the first rotating shaft 45. The tension rod 42 is installed on the tension rod mounting seat 44 and swings around the first rotating shaft 45. The wire outlet wheel 43 is installed at the swinging end of the tension rod 42. The roller mounting rod 40 is installed at the other end of the first rotating shaft 45 and swings around the first rotating shaft 45. The roller 401 is installed at the swinging end of the roller mounting rod 40. The first snap ring 49 is installed on the first rotating shaft 45. The first bearing 48 axially limits the first rotating shaft 45 through the first snap ring 49. The first stop rod 46 and the second stop rod 47 are respectively installed on one side of the upper and lower ends of the tension adjusting support 41 and respectively limit the swinging of the tension rod 42.
[0031] By adopting the above technical solution, since the gravity of the wire outlet wheel 43, the tension rod 42 and the tension rod mounting seat 44 is greater than the gravity of the roller mounting rod 40 and the roller 401, the upper end of the roller 401 is blocked by the tension rod adjusting assembly 3. In the natural state, the top of the roller 401 touches the tension rod adjusting assembly 3. The wire is hung on the wire outlet wheel 43 and pulls the wire outlet wheel 43 downward. After the wire feeding speed is adjusted in real time by the first wire feeding motor 71 and the second wire feeding motor 72 to maintain a constant tension, the wire is fed out through the wire outlet wheel 43 to supply wire for winding the skeleton pin feet and winding the coil. The tension rod adjusting assembly 3 swings upward to avoid the roller 401, and the tension rod 42 swings downward around the first rotating shaft 45 to release the wire for supplying wire to wind the pin feet; when the roller 401 is pressed downward by the tension rod adjusting assembly 3, the roller 401 drives the roller mounting rod 40 to swing downward around the first bearing 48, and the first rotating shaft 45 drives the tension rod 42 to swing upward, and the wire outlet wheel 43 rises to tension the loose wire after winding the pin feet.
[0032] Refer to Figures 4 to 6As shown in the figure, the tension rod adjusting assembly 3 includes a first tension adjusting driving device 31, a second tension adjusting driving device 32, a first mounting plate 33, a ball screw 34, a connecting piece 35, a photoelectric inductor 36, an induction piece 37, a tension adjusting base plate 38, a second bearing 39, a second rotating shaft 301, a second snap ring 302, a connecting seat 303, a linear guide rail 304, a third rotating shaft 305, a first shaft seat 306, a fourth rotating shaft 307 and a second shaft seat 308. The second rotating shaft 301 and the connecting seat 303 are integrally formed. The second bearing 39 is installed inside the top of the tension adjusting support 41 and the second bearing 39 is installed on the second rotating shaft 301. The second snap ring 302 is installed on one end of the second rotating shaft 301. The second bearing 39 axially limits the second rotating shaft 301 through the second snap ring 302. One side of one end of the tension adjusting base plate 38 is connected and installed with the connecting seat 303. The linear guide rail 304 is installed on the other side of the tension adjusting base plate 38. The first shaft seat 306 is installed inside the chassis 1. The first tension adjusting driving device 31 is rotationally connected to the first shaft seat 306 through the third rotating shaft 305. The second shaft seat 308 is slidably installed on the tension adjusting base plate 38 through the linear guide rail 304. The output end of the first tension adjusting driving device 31 is rotationally connected to the second shaft seat 308 through the fourth rotating shaft 307. The second tension adjusting driving device 32 is installed on the other end of the tension adjusting base plate 38 through the first mounting plate 33. The ball screw 34 is connected and installed with the output end of the second tension adjusting driving device 32. One end of the connecting piece 35 is connected and installed with the second shaft seat 308. The other end of the connecting piece 35 is in transmission connection with the ball screw 34.
[0033] By adopting the above technical solution, the bottom of the tension adjusting base plate 38 abuts against the roller 401. The first tension adjusting driving device 31 pushes and pulls the tension adjusting base plate 38 to swing around the second rotating shaft 301 through the second shaft seat 308 and the linear guide rail 304. The second tension adjusting driving device 32 drives the second shaft seat 308 to move on the linear guide rail 304 through the ball screw 34 and the connecting piece 35, thereby changing the moment of the first tension adjusting driving device 31 to push and pull the tension adjusting base plate 38. By adjusting the pushing and pulling force of the first tension adjusting driving device 31 or by changing the position of the second shaft seat 308 on the linear guide rail 304, the moment of pushing and pulling the tension adjusting base plate 38 can be changed.
[0034] When the second tension adjustment driving device 32 drives the second shaft seat 308 to approach the second rotating shaft 301 without the first tension adjustment driving device 31 making telescopic movement, the tension adjustment substrate 38 swings upward around the second rotating shaft 301 to avoid the roller 401. The gravity of the wire outlet wheel 43, the tension rod 42, and the tension rod mounting seat 44 is greater than the gravity of the roller mounting rod 40 and the roller 401, causing the tension rod 42 to swing downward around the first rotating shaft 45 and the roller mounting rod 40 to swing upward around the first rotating shaft 45. The roller 401 moves upward and then presses against the bottom of the tension adjustment substrate 38. At this time, the downward swing of the tension rod 42 is blocked by the tension adjustment substrate 38, and the downward swing of the tension rod 42 around the first rotating shaft 45 provides the wire required for the steering positioning before the guide needle winds the wire around the skeleton pin foot.
[0035] When the second tension adjustment driving device 32 drives the second shaft seat 308 away from the second rotating shaft 301 without the first tension adjustment driving device 31 making telescopic movement, the tension adjustment substrate 38 swings downward around the second rotating shaft 301. The tension adjustment substrate 38 presses the roller 401 to move downward, and the tension rod 42 swings upward around the first rotating shaft 45, thereby driving the wire outlet wheel 43 to tension the wire for the guide needle to turn and reset and exit after winding the wire around the foot. It solves the problem of the traditional method of manually pressing down the tension rod 42 to release the wire to provide a longer wire for the guide needle to meet the need of winding the wire around the foot for positioning, and avoids the problem that the tension rod 42 and the tension wheel of the traditional tensioner will drive the wire to swing, resulting in an increase in the angle between the wire and the vertical plane of the pressure sensor 15, and the pressure received by the pressure sensor 15 from the wire decreases or even the wire separates from the pressure sensor 15, affecting the accuracy of the pressure sensor 15 in detecting the tension of the wire and further affecting the accuracy of controlling the wire feeding speed of each wire feeding motor to drive the corresponding wire feeding wheel and adjusting the tension of the wire; at the same time, it also solves the problems that the tension detected by the pressure sensor 15 is smaller than the actual tension of the wire, the wire feeding motor does not feed the wire or slows down the wire feeding, the wire is in a shortage state after pressing down the tension rod 42 to release the wire, and the tension rod 42 and the tension wheel on it are tightened by the wire and cannot swing upward to reset to the angular position for maintaining the constant tension of the wire during the coil winding process, so that the tensioner cannot work normally during the coil winding, affecting the normal operation of the tensioner.
[0036] In this embodiment, the first tension adjustment driving device 31 is set as a cylinder, and the second tension adjustment driving device 32 is set as a servo motor.
[0037] Refer to Figure 7 As shown, the wire tension release driving assembly 2 includes a push plate lifting driving device 21, a second mounting plate 22, and a push plate 23. The push plate lifting driving device 21 is fixed in the chassis 1 through the second mounting plate 22, and the push plate 23 is installed on the output end of the push plate lifting driving device 21.
[0038] By adopting the above technical solutions, for wires with a relatively small diameter or pins on the skeleton with a relatively small diameter, no tension is required for the hanging foot winding of the wires. The push plate lifting drive device 21 drives the push plate 23 upward to push the roller 401. The roller mounting rod 40 swings upward around the first rotating shaft 45, and the tension rod 42 swings downward around the first rotating shaft 45. The wire outlet wheel 43 moves downward to release the wire, providing the wire for the guide needle to wind the hanging foot of the skeleton pin. It can automatically control the tension rod 42 to press down to release the wire according to different situations of the hanging foot winding and coil winding, thereby solving the problem that when the tensioner of the traditional structure does not require tension for wires with a relatively small diameter or pins on the skeleton with a relatively small diameter, workers need to manually press down the tension rod 42 to provide the wire for the guide needle to wind the hanging foot of the relatively thin skeleton pin.
[0039] In this embodiment, the push plate lifting drive device 21 is set as a cylinder.
[0040] Refer to Figure 8 As shown, the busbar assembly 6 includes a busbar plate 60, a first solenoid valve 61, and a second solenoid valve 62. The busbar plate 60 is installed in the chassis 1, and the first solenoid valve 61 and the second solenoid valve 62 are respectively installed on the busbar plate 60.
[0041] By adopting the above technical solutions, the first solenoid valve 61 is connected and installed to the first tension adjustment drive device 31 through an air pipe. The busbar plate 60 controls the supply of air to the first tension adjustment drive device 31 through the first solenoid valve 61. The second solenoid valve 62 is also connected and installed to the second tension adjustment drive device 32 through an air pipe. The busbar plate 60 controls the supply of air to the second tension adjustment drive device 32 through the second solenoid valve 62. It can control the first tension adjustment drive device 31 and the second tension adjustment drive device 32 to work separately or simultaneously. It not only realizes that when the wire is relatively thin or the pins on the skeleton are relatively thin and no tension is required for the hanging foot winding, the tension rod 42 can be controlled to swing downward to forcibly release the wire to provide the wire for the hanging line and winding the foot, but also realizes that when a relatively small tension is required for the hanging line and winding the foot, the tension rod 42 can be controlled to automatically swing downward to release the wire to provide the wire for the guide needle to turn and position, control the tension rod 42 to automatically swing upward to tension the wire after the guide needle turns and resets after the hanging line and winding the foot, and provides a relatively wide range of counter-tension for the tension rod 42 to swing upward to drive the wire outlet wheel 43 to tension the wire.
[0042] Refer to Figure 9 As shown, the pressure regulating valve assembly 5 includes a pressure regulating valve 50, a first pressure regulating valve joint 51, a second pressure regulating valve joint 52, and a pressure regulating valve knob 53. The pressure regulating valve 50 is installed at the bottom of the chassis 1. The first pressure regulating valve joint 51 and the second pressure regulating valve joint 52 are respectively installed on both sides of the pressure regulating valve 50. The pressure regulating valve knob 53 is installed at the bottom of the pressure regulating valve 50.
[0043] By adopting the above technical solutions, refer to Figure 1 、Figure 8 and Figure 9 As shown in Figure 9 , one end of the tracheal connector 18 is externally connected to a gas supply system (the composition structure and working principle of the gas supply system are common knowledge and will not be explained in detail here). The other end of the tracheal connector 18 is connected and installed to the first pressure regulating valve connector 51 through a trachea. The first pressure regulating valve connector 51 is also connected and installed to the manifold 60 through a trachea to supply gas to the manifold 60. Rotate the pressure regulating valve knob 53 to adjust the air pressure output by the second pressure regulating valve connector 52, and then control the output forces of the first tension regulating driving device 31 and the second tension regulating driving device 32 to adjust the torque of the push-pull tension regulating substrate 38, and finally forcibly drive the tension rod 42 to swing downward to release the wire and provide a relatively wide range of reverse tension for the tension rod 42 to drive the wire take-up wheel 43 to tension the wire.
[0044] Refer to Figure 10 As shown in Figure 10 , the wool felt clip assembly 10 includes a first clamping plate 101, a second clamping plate 102, a clamping plate rotating shaft 103, an elastic member 104, a first wool felt clip 105 and a second wool felt clip 106. The middle parts of the first clamping plate 101 and the second clamping plate 102 are rotatably connected through the clamping plate rotating shaft 103. One end of the elastic member 104 is connected and installed to one end of the first clamping plate 101. The side surface of the other end of the first clamping plate 101 facing away from the second clamping plate 102 is connected and installed to the outer side wall of one end of the chassis 1. The first wool felt clip 105 is installed on the side surface of the same end of the first clamping plate 101 facing the second clamping plate 102, and the second wool felt clip 106 is installed on the side surface of the other end of the second clamping plate 102 facing the first clamping plate 101. In this embodiment, the elastic member 104 is a spring.
[0045] By adopting the above technical solution, both ends of the elastic member 104 respectively press against the same end of the first clamping plate 101 and the second clamping plate 102. The other ends of the first clamping plate 101 and the second clamping plate 102 respectively drive the first wool felt clip 105 and the second wool felt clip 106 to clamp the wire to clean the wire. Manually press the same end of the first clamping plate 101 and the second clamping plate 102 to make the first wool felt clip 105 and the second wool felt clip 106 loosen the wire, so as to facilitate wire replacement. The first wool felt clip 105 and the second wool felt clip 106 are more convenient to use and have higher work efficiency.
[0046] Refer to Figures 1 to 10As shown in the figure, the present invention also provides a tensioning process for an anti-tension attenuation double-servo air spring automatic force arm constant-tension wire tensioner: After the wire enters from the incoming wire limit block 9, it successively passes through the first wire passing wheel 11, the wool felt clip assembly 10, the first wire feeding wheel 81, the second wire feeding wheel 82, the second wire passing wheel 12, the pressure sensor 15, the third wire passing wheel 13, the fourth wire passing wheel 14, and the outgoing wire wheel 43 to provide the wire with the tension required for the pin hanging and winding on the skeleton. The above wire feeding path changes the traditional tensioner that first winds the wire around the tensioning wheel on the tension rod 42 and then leads the wire to the pressure sensor 15 for wire tension testing, avoiding the wire swinging driven by the tension rod 42 during the swinging process, resulting in a change in the tension testing angle of the wire on the pressure sensor 15 and affecting the accuracy of the pressure sensor 15 in measuring the wire tension; the incoming wire limit block 9 limits the wire, the first wire passing wheel 11 conducts the wire, and the wool felt clip assembly 10 cleans the wire; according to the result of the pressure sensor 15 testing the wire tension, the first wire feeding wheel 81 and the second wire feeding wheel 82 respectively adjust the wire feeding speed under the drive of the first wire feeding motor 71 and the second wire feeding motor 72 to maintain a constant wire tension; the wire bypasses the second wire passing wheel 12 and the third wire passing wheel 13 on the side facing away from the chassis 1, and the pressure sensor 15 protrudes from the second wire passing wheel 12 and the third wire passing wheel 13 on the outer side of the chassis 1. The tension testing angle of the wire pressed on the pressure sensor 15 (i.e., the angle between the wire and the vertical plane when the wire is pressed on the pressure sensor 15) can be adjusted through the second wire passing wheel 12 and the third wire passing wheel 13. The second wire passing wheel 12 and the third wire passing wheel 13 can keep the wire tension testing angle within the optimal tension testing angle range of 15 degrees to 25 degrees; the wire bypasses the fourth wire passing wheel 14 on the side facing the chassis 1. The third wire passing wheel 13 and the fourth wire passing wheel 14 perform relative limit on the wire, avoiding the wire swinging driven by the tension rod assembly 4 during the swinging process, resulting in a change in the tension testing angle between the wire and the pressure sensor 15 and affecting the tension testing of the wire by the pressure sensor 15, which improves the accuracy of the first wire feeding motor 71 and the second wire feeding motor 72 respectively driving the first wire feeding wheel 81 and the second wire feeding wheel 82 to adjust the wire feeding speed to maintain a constant wire tension.
[0047] When rotating the pressure regulating valve knob 53 in the pressure regulating valve assembly 5, the air pressure output by the second pressure regulating valve joint 52 can be adjusted. The first electromagnetic valve 61 is connected and installed to the first tension regulating driving device 31 through an air pipe. The manifold 60 controls the air supply to the first tension regulating driving device 31 through the first electromagnetic valve 61. The manifold 60 controls the air supply to the second tension regulating driving device 32 through the second electromagnetic valve 62. The air pressure is adjusted through the pressure regulating valve assembly 5, and the air supply to the push plate lifting driving device 21 or the first tension regulating driving device 31 is controlled through the manifold assembly 6, finally realizing the control of the operation of the push plate lifting driving device 21 or the first tension regulating driving device 31 and the magnitude of its output force.
[0048] When the wire hanging foot needs tension for wire winding, when the first tension adjustment driving device 31 does not perform telescopic movement and the second tension adjustment driving device 32 drives the second shaft seat 308 close to the second rotating shaft 301, the tension adjustment substrate 38 swings upward around the second rotating shaft 301 and moves away from the roller 401. The gravity of the wire outlet wheel 43, the tension rod 42 and the tension rod mounting seat 44 is greater than the gravity of the roller mounting rod 40 and the roller 401. Under the pulling force of the wire on the wire outlet wheel 43, the tension rod 42 swings downward around the first rotating shaft 45, the roller mounting rod 40 swings upward around the first rotating shaft 45, and the roller 401 moves upward to press against the bottom of the tension adjustment substrate 38. The downward swing of the tension rod 42 is limited by the tension adjustment substrate 38. The tension rod 42 drives the wire outlet wheel 43 to swing downward around the first rotating shaft 45 together to release the wire to provide the required wire for wire winding on the skeleton pin and to flip the direction. At this time, the required wire tension for wire winding on the skeleton pin can be input to the pressure display 16 to control the first wire feeding motor 71 and the second wire feeding motor 72 to drive the first wire feeding wheel 81 and the second wire feeding wheel 82 respectively to adjust the wire feeding speed, thereby adjusting the required tension when the wire is wound around the skeleton pin. And by turning the pressure regulating valve knob 53 to adjust the air supply pressure, the output force of the first tension adjustment driving device 31 is adjusted to adjust the reverse tension of the wire tightened by the tension rod 42 driving the wire outlet wheel 43. The first tension adjustment driving device 31 pushes and pulls the second shaft seat 308 to drive the tension adjustment substrate 38 to swing upward or downward around the second rotating shaft 301 by an appropriate angle, so as to control the elevation angle range between the tension rod 42 and the horizontal plane during the process of tightening the wire when winding the skeleton pin.
[0049] When the first tension adjustment driving device 31 does not stretch and move, when the second tension adjustment driving device 32 drives the second shaft seat 308 away from the second rotating shaft 301, the tension adjustment substrate 38 swings downward around the second rotating shaft 301, and the tension adjustment substrate 38 presses the pressing roller 401 to move downward. The tension rod 42 drives the wire outlet wheel 43 to swing upward around the first rotating shaft 45 to tension the wire released by the skeleton after the hanging foot winding is completed and flipped and reset. At this time, the required wire tension for winding the coil can be input to the pressure display 16. It is realized that the first wire feeding motor 71 and the second wire feeding motor 72 respectively drive the first wire feeding wheel 81 and the second wire feeding wheel 82 to adjust the wire feeding speed to adjust the tension required when the wire winds the coil. By turning the pressure regulating valve knob 53 to adjust the air supply pressure, and then adjusting the output force of the first tension adjustment driving device 31 to realize adjusting the reverse tension of the wire tensioned by the tension rod 42 driving the wire outlet wheel 43 for winding the coil. The first tension adjustment driving device 31 pushes and pulls the second shaft seat 308, and then drives the tension adjustment substrate 38 to swing upward or downward around the second rotating shaft 301 by an appropriate angle, so as to accurately control the elevation angle range between the horizontal plane during the process of the tension rod 42 tensioning the wire when winding the coil.
[0050] When the wire is relatively thin or the pins on the skeleton are relatively thin and no tension is required for the hanging foot winding, the push plate lifting driving device 21 forcibly pushes the pressing roller 401 upward through the push plate 23, so that the roller mounting rod 40 swings upward around the first rotating shaft 45, and the tension rod 42 swings downward around the first rotating shaft 45, and the wire outlet wheel 43 moves downward to release the wire to supply the wire for the hanging foot winding.
[0051] Its overall structural design is suitable for winding the hanging feet of various coil pins, and can provide non-tension wire and tension wire according to different production situations to wind the hanging feet of the pins. By adjusting the air pressure through the pressure regulating valve assembly 5, the output force of the first tension regulating driving device 31 is adjusted to realize the adjustment of different reverse tensions required for the tension rod 42 and the wire outlet wheel 43 to tension the wire for hanging the feet and winding the coil. The first tension regulating driving device 31 pushes and pulls the second shaft seat 308, and then drives the tension regulating substrate 38 to swing upward or downward around the second rotating shaft 301 by an appropriate angle, so as to realize the real-time control of the elevation angle range between the tension rod 42 and the horizontal plane during the process of tensioning the wire during hanging the feet and winding the coil; In addition, it also realizes the automatic control of the tension rod 42 to be lowered to release the wire, thereby ensuring the constancy of the wire tension, and has the advantages of high efficiency in tension adjustment of the wire, simple operation, perfect function and strong versatility. It not only solves the problem of the traditional need to manually lower the tension rod to release the wire to provide a longer wire for the guide needle to meet the need of hanging the feet and winding the coil, and avoids the problem that when the tension rod and the tension wheel of the traditional tensioner drive the wire to swing, the angle between the wire and the vertical plane of the pressure sensor will become larger, resulting in a decrease in the pressure of the wire on the pressure sensor or even the separation of the wire from the pressure sensor, which affects the feeding speed of the feeding motor driving the feeding wheel and the accuracy of adjusting the wire tension, but also solves the problem that the traditional tensioner cannot work normally during the coil winding process because the pressure sensor detects that the tension of the wire is smaller than the actual tension of the wire, the feeding motor does not feed the wire or slows down the feeding, and after the tension rod is lowered to release the wire, the wire is in a shortage state and the tension rod and the tension wheel on it are tightened by the wire and cannot swing upward to reset to the angle position for maintaining the wire tension constant during the coil winding process, which affects the normal working of the tensioner, and solves the problem that the traditional tensioner structure requires workers to manually lower the tension rod to provide wire for the guide needle to hang the feet of the thinner pins on the skeleton when the wire is thinner or the pins on the skeleton are thinner and no tension is required for hanging the feet and winding the coil.
[0052] The above embodiments are only an example of the present invention, and are not used to limit the implementation and scope of rights of the present invention. Any technical solutions that are the same as or equivalent to the content described in the claims of the present invention shall be included within the protection scope of the present invention.
Claims
1. An anti-tension attenuation double-servo air spring automatic power arm constant-tension wire tensioner, comprising a chassis, characterized in that: It also includes a wire tension release drive assembly, a tension rod adjustment assembly, a tension rod assembly, a pressure regulating valve assembly, a confluence assembly, a first wire feeding motor, a second wire feeding motor, a first wire feeding wheel, a second wire feeding wheel, an incoming wire limit block, a wool felt clip assembly, a pressure sensor, a first wire passing wheel, a second wire passing wheel, a third wire passing wheel, a fourth wire passing wheel, a pressure display, a mounting seat, and an air pipe joint. The tension rod assembly is installed inside the top of the chassis and is used to tension the wire. The tension rod adjustment assembly is installed inside the top of the chassis and is used to control the tension rod assembly to release or tighten the wire. The wire tension release drive assembly is installed inside the chassis and is used to drive the tension rod assembly to forcibly release the wire for wire winding on the hanging foot to supply the wire; The first wire feeding motor and the second wire feeding motor are respectively installed on the inner side wall at one end of the chassis. The first wire feeding wheel is installed on the output shaft of the first wire feeding motor and is located on the outer side wall at the same end of the chassis. The second wire feeding wheel is installed on the output shaft of the second wire feeding motor and is located on the outer side wall at the same end of the chassis; The incoming wire limit block, the first wire passing wheel, the wool felt clip assembly, the second wire passing wheel, the pressure sensor, the third wire passing wheel, the fourth wire passing wheel, and the pressure display are respectively installed on the outer side wall at the same end of the chassis. The pressure display, the first wire feeding wheel, the third wire passing wheel, and the fourth wire passing wheel are located at the top of the outer side wall of the chassis, and the fourth wire passing wheel is located above the third wire passing wheel. The incoming wire limit block and the second wire feeding wheel are located at the bottom of the outer side wall. The third wire passing wheel and the fourth wire passing wheel are located on one side of the first wire feeding wheel. The second wire feeding wheel is located below the same side of the first wire feeding wheel. The incoming wire limit block is located below the other side of the first wire feeding wheel. The first wire passing wheel and the wool felt clip assembly are located between the incoming wire limit block and the first wire feeding wheel. The second wire passing wheel and the pressure sensor are located between the second wire feeding wheel and the third wire passing wheel; The pressure regulating valve assembly is installed at the bottom of the chassis and is used to regulate the air pressure. The confluence assembly is installed inside the chassis and is used for gas confluence. The mounting seat is installed at the bottom of the chassis and is used to fix the chassis. The air pipe joint is installed at the bottom of the chassis.
2. The anti-tension attenuation double-servo air spring automatic power arm constant-tension wire tensioner according to claim 1, characterized in that: The tension rod assembly includes a tension adjustment support, a tension rod, a wire outlet wheel, a tension rod mounting seat, a first rotating shaft, a first stop rod, a second stop rod, a first bearing, a first snap ring, a roller mounting rod, and a roller. The tension adjustment support is installed on one side wall of the top of the chassis. The first bearing is installed at the bottom of the tension adjustment support. The first rotating shaft is installed inside the first bearing. The tension rod mounting seat is installed at one end of the first rotating shaft. The tension rod is installed on the tension rod mounting seat and swings around the first rotating shaft. The wire outlet wheel is installed at the swinging end of the tension rod. The roller mounting rod is installed at the other end of the first rotating shaft and swings around the first rotating shaft. The roller is installed at the swinging end of the roller mounting rod. The first snap ring is installed on the first rotating shaft. The first bearing axially limits the first rotating shaft through the first snap ring. The first stop rod and the second stop rod are respectively installed on one side of the upper and lower ends of the tension adjustment support and respectively limit the swing of the tension rod.
3. An anti-tension attenuation double servo air spring automatic power arm constant tension wire tensioner according to claim 1, characterized in that: The described tension rod adjustment assembly includes a first tension adjustment driving device, a second tension adjustment driving device, a first mounting plate, a ball screw, a connecting member, a photoelectric inductor, an induction sheet, a tension adjustment base plate, a second bearing, a second rotating shaft, a second snap ring, a connecting seat, a linear guide rail, a third rotating shaft, a first shaft seat, a fourth rotating shaft, and a second shaft seat. The second rotating shaft and the connecting seat are integrally formed. The second bearing is installed on the second rotating shaft, and the second snap ring is installed at one end of the second rotating shaft. The second bearing axially limits the second rotating shaft through the second snap ring. One side surface of one end of the tension adjustment base plate is connected and installed with the connecting seat. The linear guide rail is installed on the other side surface of the tension adjustment base plate. The first shaft seat is installed in the chassis. The first tension adjustment driving device is rotationally connected to the first shaft seat through the third rotating shaft. The second shaft seat is slidably installed on the tension adjustment base plate through the linear guide rail. The output end of the first tension adjustment driving device is rotationally connected to the second shaft seat through the fourth rotating shaft. The second tension adjustment driving device is installed on the other end of the tension adjustment base plate through the first mounting plate. The ball screw is connected and installed with the output end of the second tension adjustment driving device. One end of the connecting member is connected and installed with the second shaft seat, and the other end of the connecting member is in transmission connection with the ball screw.
4. An anti-tension attenuation double-servo air spring automatic power arm constant-tension wire tensioner according to claim 1, characterized in that: The described wire tension release driving assembly includes a push plate lifting driving device, a second mounting plate, and a push plate. The push plate lifting driving device is fixed in the chassis through the second mounting plate, and the push plate is installed on the output end of the push plate lifting driving device.
5. An anti-tension attenuation double servo air spring automatic power arm constant tension wire tensioner according to claim 1, characterized in that: The described busbar assembly includes a busbar plate, a first solenoid valve, and a second solenoid valve. The busbar plate is installed in the chassis, and the first solenoid valve and the second solenoid valve are respectively installed on the busbar plate.
6. The automatic tensioner for wire with constant tension of counter-tension attenuation double servo air spring according to claim 1, characterized in that: The described pressure regulating valve assembly includes a pressure regulating valve, a first pressure regulating valve joint, a second pressure regulating valve joint, and a pressure regulating valve knob. The pressure regulating valve is installed at the bottom of the chassis. The first pressure regulating valve joint and the second pressure regulating valve joint are respectively installed on both sides of the pressure regulating valve, and the pressure regulating valve knob is installed at the bottom of the pressure regulating valve.
7. An anti-tension attenuation double-servo air spring automatic power arm constant-tension wire tensioner according to claim 1, characterized in that: The described wool felt clip assembly includes a first clamping plate, a second clamping plate, a clamping plate rotating shaft, an elastic member, a first wool felt clip, and a second wool felt clip. The middle parts of the first clamping plate and the second clamping plate are rotationally connected through the clamping plate rotating shaft. One end of the elastic member is connected and installed with one end of the first clamping plate, and the other end of the elastic member is connected and installed with one end of the second clamping plate. The side surface of the other end of the first clamping plate facing away from the second clamping plate is connected and installed with the outer side wall of one end of the chassis. The first wool felt clip is installed on the side surface of the same end of the first clamping plate facing the second clamping plate, and the second wool felt clip is installed on the side surface of the other end of the second plate facing the first clamping plate.