Tension adjusting mechanism

Abstract

The utility model discloses a tension adjusting mechanism, which relates to the technical field of motor manufacture and comprises a bottom plate. The buffer assembly is arranged on the bottom plate; the wire feeding assembly comprises a rotating wheel and a driving part which are arranged on the bottom plate, and the driving part is in driving connection with the rotating wheel and drives the rotating wheel to rotate; the tension assembly is arranged on the bottom plate and comprises a tension wheel, and the tension wheel moves on the bottom plate in the first direction; the position sensor is used for detecting the moving distance of the tension wheel in the first direction; the tension detector is arranged on the bottom plate and is used for detecting the tension of the enameled wire; wherein the enameled wire sequentially penetrates through the buffer assembly, the rotating wheel, the tension assembly and the tension detector, and the driving piece is in communication connection with the position sensor so as to control the rotating speed of the rotating wheel according to detection data of the position sensor. Tension can be conveniently adjusted according to wire rods with different wire diameters, the wire rods are easy to change, and the tension value of the wire rods can be conveniently ensured to be within a set tolerance range.

Description

Technical Field

[0001] The utility model relates to the technical field of motor manufacturing, and particularly relates to a tension adjusting mechanism. Background Art

[0002] In the process of motor production, the winding of the stator or rotor is one of the key steps, which is directly related to the performance and efficiency of the motor. In the traditional winding process, the tension control mostly relies on a mechanical tension device, that is, the constant tension of the wire during winding is maintained by the combination of a tension rod and a spring. However, the tensions of enameled wires with different wire diameters are different, and the adjustment range of the tension adjustment device relying on the physical spring is limited. Each time the product model is changed, the spring pre-tightening force needs to be manually adjusted, which is time-consuming and laborious, and it is difficult to realize the rapid product change of the wire. Summary of the Utility Model

[0003] The main object of the utility model is to propose a tension adjusting mechanism, aiming to facilitate the rapid product change of the wire.

[0004] To achieve the above object, the tension adjusting mechanism proposed by the utility model includes:

[0005] A bottom plate;

[0006] A buffer assembly arranged on the bottom plate;

[0007] A wire feeding assembly, including a runner and a driving member arranged on the bottom plate, the driving member is in driving connection with the runner and drives the runner to rotate;

[0008] A tension assembly arranged on the bottom plate, the tension assembly includes a tension wheel, and the tension wheel moves along a first direction on the bottom plate;

[0009] A position sensor for detecting the distance that the tension wheel moves along the first direction; and

[0010] A tension detector arranged on the bottom plate to detect the tension of the enameled wire;

[0011] Wherein, the enameled wire sequentially passes through the buffer assembly, the runner, the tension assembly and the tension detector, and the driving member is in communication connection with the position sensor to control the rotation speed of the runner according to the detection data of the position sensor.

[0012] In an embodiment, the buffer assembly includes:

[0013] A buffer wheel slidably arranged on the bottom plate, and the buffer wheel slides along the first direction on the bottom plate;

[0014] An elastic member, one end of which is fixed to the bottom plate and the other end is connected to the buffer wheel.

[0015] In one embodiment, the tension assembly further includes a cylinder, which has a cylinder block and a piston rod. The piston rod is connected to the tension wheel, and the position sensor is disposed on the cylinder block to detect the moving distance of the piston rod.

[0016] In one embodiment, at least one cylinder is provided. The cylinder further includes a proportional valve, which is used to adjust the flow rate of the cylinder to adjust the tension value. The proportional valve is communicatively connected to the position sensor to control the gas flow rate according to the moving distance of the tension wheel.

[0017] In one embodiment, the wire feeding assembly further includes a wire length sensor, which is disposed on the bottom plate to detect the rotation of the rotating wheel.

[0018] In one embodiment, the enameled wire is wound around the rotating wheel for at least one turn.

[0019] In one embodiment, the tension adjustment mechanism further includes a wool felt structure, which is disposed on the bottom plate.

[0020] In one embodiment, the tension adjustment mechanism further includes a wire pressing assembly, which is disposed between the wool felt structure and the buffer assembly. The enameled wire passes out from the wire barrel and sequentially passes through the wool felt structure, the wire pressing assembly, and the buffer wheel.

[0021] In one embodiment, the tension assembly further includes a mounting plate. The tension wheel is rotatably disposed on the mounting plate. A first slider is provided on one side of the mounting plate facing the bottom plate, and a first slide rail adapted to the first slider is provided on the bottom plate. The first slide rail extends along the first direction;

[0022] And / or, the buffer assembly further includes a support plate. The buffer wheel is rotatably disposed on the support plate. A second slider is provided on one side of the support plate facing the bottom plate, and a second slide rail adapted to the second slider is provided on the bottom plate. The second slide rail extends along the first direction.

[0023] In the technical solution of the present utility model, with the bottom plate as the installation reference, the buffer assembly, the wire feeding assembly and the tension assembly are all installed on the bottom plate. With the same installation reference, it is convenient to adjust the tension of the wire. After the enameled wire passes through the wire barrel, it successively passes through the buffer assembly, the wire feeding assembly, the tension assembly and the tension detector. By providing pre-pressure to the enameled wire through the buffer assembly, it can ensure that the wire maintains an appropriate tension state, avoiding looseness and slipping. And when the wire is wound suddenly at an accelerated speed later, there will be a large tension change, which is likely to cause insufficient or excessive tension of the enameled wire. By providing pre-pressure through the buffer assembly, the tension change can be smoothed. The tension assembly includes a tension wheel. The wire feeding assembly and the tension wheel are arranged at intervals and staggered in the first direction. When the enameled wire passes through the wire feeding assembly and winds around the tension wheel, the tension wheel has a tendency to move towards the wire feeding assembly in the first direction. The moving distance of the tension wheel in the first direction is detected by a position sensor, and this value is transmitted to the driving member. The driving member adjusts the rotation speed of the rotating wheel according to the moving distance of the tension wheel, thereby controlling the wire feeding speed; the position of the tension wheel in the first direction is different, and the tension is different. That is, when replacing wires with different wire diameters, due to the different tensions of different wires, it is necessary to adjust the resistance value of the wire pulling the tension wheel to move in the first direction to adapt to the tensions of different wires. It is easy to change the type. In addition, the enameled wire passing through the tension wheel passes through the tension detector, and the tension value of the enameled wire is detected by the tension detector to see if it is within the set tolerance range. If it deviates from the tolerance range, the position of the tension wheel is adjusted by adjusting the resistance of the tension wheel to move, so as to adjust the tension of the enameled wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0025] Figure 1 FIG. is a schematic structural diagram of an embodiment of the tension adjustment mechanism provided by the present utility model;

[0026] Figure 2 FIG. is a schematic structural diagram of another embodiment of the tension adjustment mechanism provided by the present utility model.

[0027] Explanation of the reference numerals in the drawings:

[0028] 100, bottom plate;

[0029] 200, buffer assembly; 210, buffer wheel; 220, elastic member; 230, support plate;

[0030] 300. Wire feeding assembly; 310. Runner; 320. Wire length sensor; 330. Driving part; 340. Bolt;

[0031] 400. Tension assembly; 410. Tension wheel; 420. Cylinder; 430. Mounting plate; 440. First slide rail;

[0032] 500. Position sensor;

[0033] 600. Tension detector;

[0034] 700. Wool felt structure;

[0035] 800. Wire pressing assembly.

[0036] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0038] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0040] In the process of motor production, winding the stator or rotor is one of the key steps, which is directly related to the performance and efficiency of the motor. In the traditional winding process, tension control mostly relies on mechanical tension devices, that is, by combining a tension rod and a spring to maintain a constant tension of the wire during winding. However, the tensions of enameled wires with different wire diameters are different, and the adjustment range of the tension adjustment device relying on a physical spring is limited. Each time the product model is changed, the spring pre-tightening force needs to be manually adjusted, which is time-consuming and laborious, and it is difficult to achieve rapid wire type change.

[0041] The utility model proposes a tension adjustment mechanism.

[0042] Please refer to Figure 1 and Figure 2 In an embodiment of the utility model, the tension adjustment mechanism includes:

[0043] A bottom plate 100;

[0044] A buffer assembly 200, provided on the bottom plate 100;

[0045] A wire feeding assembly 300, including a runner 310 provided on the bottom plate 100 and a driving member 330, the driving member 330 is drivingly connected to the runner 310 and drives the runner 310 to rotate;

[0046] A tension assembly 400, provided on the bottom plate 100, the tension assembly 400 includes a tension wheel 410, and the tension wheel 410 moves along a first direction on the bottom plate 100;

[0047] A position sensor 500, used to detect the distance that the tension wheel 410 moves along the first direction; and

[0048] A tension detector 600, provided on the bottom plate 100 to detect the tension of the enameled wire;

[0049] Wherein, the enameled wire sequentially passes through the buffer assembly 200, the runner 310, the tension assembly 400 and the tension detector 600, and the driving member 330 is communicatively connected to the position sensor 500 to control the rotation speed of the runner 310 according to the detection data of the position sensor 500.

[0050] In the technical solution of the present utility model, with the bottom plate 100 as the installation reference, the buffer assembly 200, the wire feeding assembly 300, and the tension assembly 400 are all installed on the bottom plate 100. With the same installation reference, it is convenient to adjust the tension of the wire. After the enameled wire passes through the wire barrel, it sequentially passes through the buffer assembly 200, the wire feeding assembly 300, the tension assembly 400, and the tension detector 600. The buffer assembly 200 provides pre-pressure to the enameled wire, which can ensure that the wire maintains a moderate tension state, avoiding loosening and slipping. Moreover, when winding the wire later, a sudden acceleration will cause a large change in tension, which is likely to result in insufficient or excessive tension of the enameled wire. By providing pre-pressure through the buffer assembly 200, the tension change can be smoothed. The tension assembly 400 includes a tension wheel 410. The wire feeding assembly 300 and the tension wheel 410 are arranged at intervals and staggered in the first direction. When the enameled wire passes through the wire feeding assembly 300 and winds around the tension wheel 410, the tension wheel 410 has a tendency to move towards the wire feeding assembly 300 in the first direction. The position sensor 500 detects the moving distance of the tension wheel 410 in the first direction and transmits this value to the driving member 330. The driving member 330 adjusts the rotation speed of the rotating wheel 310 according to the moving distance of the tension wheel 410, thereby controlling the wire feeding speed. The position of the tension wheel 410 in the first direction is different, and the tension is different. That is, when replacing wires with different wire diameters, since the tensions of different wires are different, it is necessary to adjust the resistance value of the wire pulling the tension wheel 410 to move in the first direction to adapt to the tensions of different wires. The wire type change is easy. In addition, the enameled wire passing through the tension wheel 410 passes through the tension detector 600. The tension detector 600 detects whether the tension value of the enameled wire is within the set tolerance range. If it deviates from the tolerance range, the position of the tension wheel 410 is adjusted by adjusting the resistance of the tension wheel 410 to move, so as to adjust the tension of the enameled wire.

[0051] In a specific embodiment, the bottom plate 100 can be regarded as being vertically installed. The buffer assembly 200, the tension wheel 410, the rotating wheel 310, and the tension detector 600 are all arranged on one side of the bottom plate 100 and are respectively installed at different heights on the bottom plate 100 and are staggered. Specifically, the buffer assembly 200 is arranged at the lower part on one side of the bottom plate 100, the rotating wheel 310 is arranged on the bottom plate 100 and is located at the upper right of the buffer assembly 200, the tension wheel 410 is at the upper left of the rotating wheel 310, and the tension detector 600 is located at the upper right of the tension wheel 410. That is, after the enameled wire passes through the rotating wheel 310, it winds around the tension wheel 410 and reaches the tension detector 600, making the tension wheel 410 have a tendency to move to the right. When replacing wires with different wire diameters, for example, when replacing a wire with a thicker wire diameter, since the tension value is large, it is also necessary to correspondingly increase the tension of the tension adjustment mechanism, that is, increase the resistance of the tension wheel 410 to move in the first direction, so that it is more laborious for the wire to drive the tension wheel 410 to move to the right on the tension wheel 410.

[0052] In addition, when the tension adjustment mechanism is applied to the stator or rotor winding, when the winding end increases the winding speed, the enameled wire will be tightened, which will pull the tension wheel 410 to move towards the tension detector 600. As a result, the position sensor 500 detects the position change of the tension wheel 410, and adjusts the rotation speed of the runner 310 through the driving member 330, increases the rotation speed, and improves the wire feeding speed to meet the winding requirements of the winding end and avoid wire breakage during long-term winding. Correspondingly, when the winding speed of the winding end slows down, the required tension of the wire decreases, the tension wheel 410 moves to the left, the position sensor 500 detects the position change of the tension wheel 410, and the driving member 330 controls to reduce the rotation speed of the runner 310 to slow down the wire feeding speed, so that the tension of the wire is always within the set tolerance range. The driving member 330 for controlling the rotation speed of the runner 310 uses a servo motor, and the servo motor is arranged on the side of the bottom plate 100 away from the runner 310.

[0053] In the embodiment of the present invention, the buffer assembly 200 includes:

[0054] A buffer wheel 210, which is slidably arranged on the bottom plate 100, and the buffer wheel 210 slides on the bottom plate 100 along the first direction;

[0055] An elastic member 220, one end of which is fixed to the bottom plate 100 and the other end is connected to the buffer wheel 210.

[0056] Please refer to Figure 1 , the buffer wheel 210 is slidably arranged on one side of the bottom plate 100 and moves horizontally on the bottom plate 100. The enameled wire is wound around the buffer wheel 210. In this embodiment, the winding direction of the enameled wire is clockwise and leads to the wire feeding assembly 300. Under the pulling of the enameled wire, the buffer wheel 210 has a tendency to move to the right on the bottom plate 100. An installation seat is arranged on the bottom plate 100, and at least one elastic member 220 is arranged on the installation seat to connect the buffer wheel 210, so that the buffer wheel 210 has a tendency to move to the left, which is opposite to the pulling direction of the enameled wire, and provides a pre-pressure for the enameled wire on the buffer wheel 210 to ensure that the enameled wire maintains a proper tension state before winding and avoid looseness. In addition, the elastic member 220 can also absorb and relieve the tension fluctuation caused by the speed change during the winding process of the enameled wire.

[0057] The elastic member 220 can adopt a tension spring but is not limited to a tension spring.

[0058] In the embodiment of the present invention, the tension assembly 400 further includes a cylinder 420. The cylinder 420 has a cylinder body and a piston rod, and the piston rod is connected to the tension wheel 410. The position sensor 500 is arranged on the cylinder body to detect the moving distance of the piston rod.

[0059] Please refer to Figure 1, the cylinder block is fixed on the bottom plate 100. The piston rod faces the tension wheel 410 and is connected to the tension wheel 410. When the enameled wire is wound around the tension wheel 410, under the pulling of the enameled wire, the tension wheel 410 is driven to move to the right. The tension wheel 410 drives the piston rod to move to the right. The position sensor 500 detects the moving distance of the piston rod on the cylinder block and transmits a signal to the driving member 330 to control the rotation speed of the rotating wheel 310. In addition, the air cylinder 420 adjusts the pulling force of the piston rod by controlling the flow rate, making it more difficult or easier to pull the tension wheel 410 by the enameled wire, thereby adjusting the tension of the wire.

[0060] In an embodiment of the present utility model, at least one air cylinder 420 is provided. The air cylinder 420 further includes a proportional valve, and the proportional valve is used to adjust the flow rate of the air cylinder 420 to adjust the tension value.

[0061] Specifically, each air cylinder 420 is provided with a proportional valve. By controlling the gas flow rate through the proportional valve, each air cylinder 420 can reach a relatively constant value to maintain a constant tension. When replacing wires with different wire diameters, since the tensions of wires with different wire diameters are different, by changing the set value of the proportional valve to adjust the gas flow rate, the piston rod is made to be pulled more easily or difficultly, thereby adjusting the tension of the wire.

[0062] In an embodiment of the present utility model, the wire feeding assembly 300 further includes a wire length counting sensor 320, and the wire length counting sensor 320 is arranged on the bottom plate 100 to detect the rotation of the rotating wheel 310.

[0063] Please refer to Figure 1 , a plurality of bolts are circumferentially spaced on one side of the rotating wheel 310 facing the bottom plate 100. The bolts are evenly arranged. The wire length counting sensor 320 is arranged on the bottom plate 100 to sense the bolts, so as to sense the rotation angle and number of turns of the rotating wheel 310. Each time a bolt is sensed, a certain number of pulse signals are generated, and the wire length required for winding a workpiece can be accurately obtained, ensuring accurate control of the wire length during the winding process, improving the consistency of the winding dimension accuracy of the workpiece, and precisely using the wire to avoid waste; in addition, the wire length counting sensor 320 can also be used to sense the wire breakage fault. When the wire breaks, the wire has no tension, the tension wheel 410 moves to the left, the position sensor 500 detects the signal and transmits it to the driving member 330, and the driving member 330 reduces the rotation speed of the rotating wheel 310 until the rotation speed is 0. At this time, the wire length counting sensor 320 senses that the rotating wheel 310 no longer rotates, indicating that the wire has broken, and the wire length counting sensor 320 issues an alarm to feedback to the staff.

[0064] In an embodiment of the present utility model, the enameled wire is wound around the rotating wheel 310 for at least one turn.

[0065] Specifically, the wire is wound around the rotating wheel 310 for multiple turns, which can increase the contact area with the rotating wheel 310 and improve the friction force. If it is only wound for one turn, the wire is wound around the rotating wheel 310 in the counterclockwise direction and faces the tension wheel 410, that is, the contact area between the wire and the rotating wheel 310 is only 1 / 2. When the winding speed is too fast or the speed is suddenly lowered, the wire will break away from the rotating wheel 310. By winding at least one turn, the contact area is expanded, the friction force with the rotating wheel 310 is increased, and the wheel detachment is avoided.

[0066] In the embodiment of the present invention, the tension adjustment mechanism further includes a wool felt structure 700, and the wool felt structure 700 is arranged on the bottom plate 100.

[0067] Please refer to Figure 1 , the wool felt structure 700 is arranged at the bottom of the bottom plate 100. After the wire passes through the wire barrel, it passes through the wool felt structure 700 and then leads to the buffer assembly 200. The wool felt structure 700 provides an initial pre-tightening force for the passing wire. Since the wool felt structure 700 has certain elasticity and compressibility, the wool felt fits on the surface of the wire, which can provide a pre-pressing effect for the wire, and when the wire deforms, fine-tune the contact pressure to make the initially bent wire straight, avoiding knotting during the wire winding process. Moreover, the wool felt structure 700 is soft, and on the basis of straightening the wire, it can also reduce damage to the surface of the wire, especially for enameled wire, which can prevent scratching or damaging the insulating layer.

[0068] In the embodiment of the present invention, the tension adjustment mechanism further includes a wire pressing assembly 800, and the wire pressing assembly 800 is arranged between the wool felt structure 700 and the buffer assembly 200. The enameled wire passes through the wire barrel and successively passes through the wool felt structure 700, the wire pressing assembly 800 and the buffer wheel 210.

[0069] Please refer to Figure 1 , the wire pressing assembly 800 is arranged between the wool felt structure 700 and the buffer assembly 200. The wire pressing assembly 800 includes a plurality of wire pressing wheels. After the wire passes through the wool felt structure 700, it successively passes through several wire pressing wheels and leads to the buffer wheel 210. The wire pressing assembly 800 provides damping for the wire, so that the wire passing through the wire pressing assembly 800 is smooth and stable. Each wire pressing wheel straightens the wire through the friction force, avoiding knotting during the wire winding process and affecting the winding quality.

[0070] In the embodiment of the present invention, the tension assembly 400 further includes a mounting plate 430. The tension wheel 410 is rotatably arranged on the mounting plate 430. A first slider is arranged on one side of the mounting plate 430 facing the bottom plate 100. A first sliding rail 440 adapted to the first slider is arranged on the bottom plate 100, and the first sliding rail 440 extends along the first direction;

[0071] And / or, the buffer assembly 200 further includes a support plate 230. The buffer wheel 210 is rotatably arranged on the support plate 230. A second slider is provided on one side of the support plate 230 facing the bottom plate 100. The bottom plate 100 is provided with a second slide rail adapted to the second slider, and the second slide rail extends along the first direction.

[0072] Please refer to Figure 1 , the tension wheel 410 is installed on the mounting plate 430 through a bearing, and the mounting plate 430 is connected to the piston rod. A first slide rail 440 is arranged on the bottom plate 100 along the first direction. The mounting plate 430 slides on the first slide rail 440 by providing a first slider to guide the movement of the tension wheel 410, reduce the friction of the tension wheel 410 sliding on the bottom plate 100, and also improve the stability of moving on the bottom plate 100.

[0073] Similarly, a second slide rail is also arranged on the bottom plate 100, and a second slider is arranged on the support plate 230 to cooperate with the second slide rail to guide the movement of the buffer wheel 210 and improve the stability of the buffer wheel 210 moving along the first direction.

[0074] The above are only exemplary embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the technical concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A tension adjustment mechanism, characterized in that: include: Base plate; A buffer assembly, arranged on the bottom plate; A wire feeding assembly, comprising a rotating wheel and a driving member provided on the bottom plate, wherein the driving member is drivingly connected to the rotating wheel and drives the rotating wheel to rotate; A tension assembly, disposed on the bottom plate, the tension assembly comprising a tension wheel, the tension wheel moving along a first direction on the bottom plate; A position sensor, used for detecting the distance moved by the tension wheel along the first direction; as well as A tension detector is provided on the bottom plate to detect the tension of the paint leather thread; The paint leather wire passes through the buffer assembly, the rotating wheel, the tension assembly and the tension detector in sequence, and the driving member is communicatively connected with the position sensor to control the rotation speed of the rotating wheel according to the detection data of the position sensor.

2. The tension adjustment mechanism according to claim 1, characterized in that: The buffer assembly comprises: A buffer wheel, slidably disposed on the bottom plate, and the buffer wheel slides on the bottom plate along the first direction; An elastic member has one end fixed to the bottom plate and the other end connected to the buffer wheel.

3. The tension adjustment mechanism according to claim 1, characterized in that: The tension assembly further comprises a cylinder having a cylinder body and a piston rod, wherein the piston rod is connected to the tension wheel, and the position sensor is arranged on the cylinder body to detect the moving distance of the piston rod.

4. The tension adjustment mechanism according to claim 3, characterized in that: At least one cylinder is provided, and the cylinder further comprises a proportional valve, and the proportional valve is used to adjust the flow of the cylinder to adjust the tension value.

5. The tension adjustment mechanism according to claim 4, characterized in that: The wire feeding assembly also includes a wire length sensor, which is arranged on the bottom plate to detect the rotation of the rotating wheel.

6. The tension adjustment mechanism according to claim 1, wherein: The patent leather wire is wound around the rotating wheel for at least one circle.

7. The tension adjustment mechanism according to claim 2, characterized in that: The tension adjustment mechanism further comprises a wool felt structure, and the wool felt structure is arranged on the bottom plate.

8. The tension adjustment mechanism according to claim 7, characterized in that: The tension adjustment mechanism also includes a wire pressing assembly, which is arranged between the wool felt structure and the buffer assembly. The paint leather wire passes through the wire barrel and passes through the wool felt structure, the wire pressing assembly and the buffer wheel in sequence.

9. The tension adjustment mechanism according to claim 2, characterized in that: The tension assembly further includes a mounting plate, the tension wheel is rotatably mounted on the mounting plate, a first slider is disposed on a side of the mounting plate facing the bottom plate, a first slide rail matched with the first slider is disposed on the bottom plate, and the first slide rail extends along the first direction; And / or, the buffer assembly also includes a support plate, the buffer wheel is rotatably arranged on the support plate, a second slider is provided on the side of the support plate facing the base plate, the base plate is provided with a second slide rail adapted to the second slider, and the second slide rail extends along the first direction.

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