Unwinding mechanism

Abstract

The utility model discloses an unwinding mechanism which comprises a first driving assembly, a second driving assembly and a third driving assembly. The ball spline is connected with the output shaft, and the ball spline can move in the X direction relative to the output shaft; the transmission assembly is arranged on the ball spline; and the tensioning shaft is configured to be used for installing a material roll, and the tensioning shaft is connected with the transmission assembly. According to the technical scheme, the resistance generated when the tensioning shaft moves in the X direction can be reduced, and the stability and deviation rectifying efficiency of the unwinding mechanism are improved.

Description

Technical Field

[0001] This application belongs to the field of automation equipment technology, and in particular relates to an unwinding mechanism. Background Technology

[0002] During the operation of the unwinding mechanism, the driving force of the relevant driving components can easily cause unstable movement of the relevant parts, which can easily lead to displacement deviations during the unwinding and correction process.

[0003] Currently, unwinding mechanisms typically connect the transmission component to the coupling, achieving the correction function through relative displacement between the transmission component and the coupling. However, the movement of the transmission component is based on dry friction, which is inconvenient and results in poor stability. Utility Model Content

[0004] The purpose of this application is to provide an unwinding mechanism.

[0005] According to a first aspect of the embodiments of this application, a winding unwinding mechanism is provided, comprising:

[0006] A first drive component, the first drive component including an output shaft;

[0007] A ball spline, which is connected to the output shaft, and the ball spline is movable relative to the output shaft in the X direction;

[0008] A transmission assembly, wherein the transmission assembly is disposed on the ball spline;

[0009] A tensioning shaft, configured to mount a material roll, is connected to the transmission assembly.

[0010] Optionally, the transmission assembly includes a first transmission component and a second transmission component. The first transmission component is connected to the ball spline and has a through hole. The inner wall of the through hole is an internal gear ring. The second transmission component is a gear, and the tensioning shaft is connected to the gear. The gear meshes with the internal gear ring.

[0011] Optionally, the unwinding mechanism further includes a first mounting base, a first support base, and a first sliding assembly. The first support base is located below the first mounting base, and the first support base and the first mounting base are slidably connected via the first sliding assembly. The tensioning shaft is rotatably connected to the first mounting base, and the tensioning shaft is rotatable relative to the first mounting base about its own axis.

[0012] Optionally, the unwinding mechanism further includes a lever assembly, which is disposed on the first mounting base and connected to the ball spline. The lever assembly can drive the ball spline to move in the X direction.

[0013] Optionally, the unwinding mechanism further includes a second drive component, the output end of which is connected to the first mounting base, and the second drive component is capable of driving the first mounting base to move along the X direction.

[0014] Optionally, the second drive assembly includes a first drive member and a connector. The first drive member is disposed on the first support base. One end of the connector is connected to the output end of the first drive member, and the other end of the connector is connected to the first mounting base. The first drive member can drive the first mounting base to move relative to the first support base in the X direction through the connector.

[0015] Optionally, the second drive assembly further includes a first limiting part and a second limiting part, the first limiting part and the second limiting part being spaced apart along the X direction on the first support base, and the output end of the first drive member being located between the first limiting part and the second limiting part.

[0016] Optionally, the unwinding mechanism further includes a second mounting base, a second support base, a second sliding assembly, and a connecting rod assembly. The second mounting base and the first mounting base are spaced apart along the X direction. The second support base is located below the second mounting base. The second support base and the second mounting base are slidably connected through the second sliding assembly. One end of the connecting rod assembly is connected to the first mounting base, and the other end of the connecting rod assembly is connected to the second mounting base.

[0017] The tensioning shaft includes a first end and a second end, the first end being rotatably connected to the first mounting base, and the second end being rotatably connected to the second mounting base.

[0018] Optionally, the first mounting base includes:

[0019] A first mounting part is provided with a first receiving groove. The first mounting part includes a first mounting end and a second mounting end, which are located on both sides of the first receiving groove.

[0020] The second mounting part is provided with a second receiving groove. The second mounting part includes a third mounting end and a fourth mounting end, which are located on both sides of the second receiving groove.

[0021] The first mounting end is rotatably connected to the third mounting end, the third mounting end is connected to the fourth mounting end through a first snap-fit ​​assembly, the first receiving groove and the second receiving groove form a first mounting groove, and the first end is disposed in the first mounting groove.

[0022] Optionally, the second mounting base includes:

[0023] The third mounting part is provided with a third receiving groove. The third mounting part includes a fifth mounting end and a sixth mounting end, which are located on both sides of the third receiving groove.

[0024] The fourth mounting part is provided with a fourth receiving groove. The fourth mounting part includes a seventh mounting end and an eighth mounting end, which are located on both sides of the fourth receiving groove.

[0025] The fifth mounting end is rotatably connected to the seventh mounting end, the sixth mounting end is connected to the eighth mounting end through a second snap-fit ​​assembly, the third receiving groove and the fourth receiving groove form a second mounting groove, and the second end is disposed in the second mounting groove.

[0026] One technical advantage of this application embodiment is that, by taking advantage of the linear movement between the ball spline and the output shaft, the transmission component is set on the ball spline, and the correction is achieved by the ball spline moving relative to the output shaft in the X direction. This reduces the resistance of the tensioning shaft when it moves in the X direction and improves the stability and correction efficiency of the unwinding mechanism.

[0027] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0029] Figure 1 This is a schematic diagram of the unwinding mechanism in the embodiments of this application;

[0030] Figure 2 for Figure 1 Sectional view at point AA;

[0031] Figure 3 for Figure 1 A magnified view of section B in the image;

[0032] Figure 4 This is a schematic diagram of the unwinding mechanism in the embodiments of this application;

[0033] Figure 5 for Figure 4 Sectional view at CC in the middle;

[0034] Figure 6 for Figure 5 A magnified view of point D in the image;

[0035] Figure 7 for Figure 5A magnified view of point E in the image;

[0036] Figure 8 This is a schematic diagram of the unwinding mechanism in the embodiments of this application.

[0037] Explanation of reference numerals in the attached drawings: Unwinding mechanism 100; Ball spline 1; First drive assembly 2; Output shaft 21; Transmission assembly 3; First transmission component 31; Second transmission component 32; Tensioning shaft 4; First end 41; Second end 42; Second drive assembly 5; First drive component 51; Connecting rod 52; First limiting part 53; Second limiting part 54; First mounting seat 6; First mounting part 61; Second mounting part 62; First snap-fit ​​assembly 63; Second mounting seat 7; Third mounting part 71; Fifth mounting end 711; Sixth mounting end 712; Third receiving groove 713; Fourth mounting part 72; Seventh mounting end 721; Eighth mounting end 722; Fourth receiving groove 723; Second snap-fit ​​assembly 73; First support seat 8; Second support seat 9; Linkage assembly 10; Lever assembly 11; First sliding assembly 12; Second sliding assembly 13. Detailed Implementation

[0038] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0039] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0040] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0041] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0043] First, it should be noted that the X, Y, and Z directions mentioned in the embodiments of this application are referred to in the appendix. Figure 1 and Figure 4 The marked directions. Among them, the axes in the X direction, Y direction, and Z direction intersect each other.

[0044] like Figures 1-8As shown, according to a first aspect of the embodiments of this application, an unwinding mechanism 100 is provided, including a first drive assembly 2, a ball spline 1, a transmission assembly 3, and a tensioning shaft 4; the first drive assembly 2 includes an output shaft 21; the ball spline 1 is connected to the output shaft 21, and the ball spline 1 is movable relative to the output shaft 21 in the X direction; the transmission assembly 3 is disposed on the ball spline 1; the tensioning shaft 4 is configured to mount a material roll, and the tensioning shaft 4 is connected to the transmission assembly 3.

[0045] like Figure 1 and Figure 3 As shown, the unwinding mechanism 100 includes a first drive assembly 2, a ball spline 1, a transmission assembly 3, and a tensioning shaft 4; wherein, the tensioning shaft 4 is used to mount the material roll, and when the tensioning shaft 4 rotates around its own axis, it can unwind or rewind, and the first drive assembly 2 can provide power for the tensioning shaft 4 to rotate around its own axis.

[0046] In related technologies, during the winding and unwinding process, the tension shaft 4 may be deviated due to vibration, shaking and other problems. Therefore, it is necessary to correct the deviation of the tension shaft 4 in order to improve the efficiency and quality of winding and unwinding.

[0047] like Figure 5 and Figure 6 As shown, the first drive assembly 2 includes an output shaft 21 connected to a ball spline 1. The ball spline 1 can move relative to the output shaft 21 in the X direction, which is the axial direction of the output shaft 21. The transmission assembly 3 is connected to the ball spline 1, and one end of the tensioning shaft 4 is connected to the transmission assembly 3. The first drive assembly 2 can drive the ball spline 1 to rotate around the axis in the X direction through the output shaft 21, and can drive the tensioning shaft 4 to rotate around its own axis through the transmission assembly 3. The ball spline 1 can also move relative to the output shaft 21 in the X direction, thereby driving the tensioning shaft 4 to move in the X direction through the transmission assembly 3 to achieve the correction function.

[0048] The unwinding mechanism 100 of this application utilizes the linear movement between the ball spline 1 and the output shaft 21 to mount the transmission component 3 on the ball spline 1. By moving the ball spline 1 relative to the output shaft 21 in the X direction, it achieves correction, which reduces the resistance of the tensioning shaft 4 when moving in the X direction, thereby improving the stability and correction efficiency of the unwinding mechanism 100. Furthermore, the ball spline 1 has the characteristics of high transmission efficiency, high precision, low wear, ability to withstand multi-directional loads, and easy maintenance, thereby improving the working efficiency and control accuracy of the unwinding mechanism 100.

[0049] In one optional embodiment, the transmission assembly 3 includes a first transmission member 31 and a second transmission member 32. The first transmission member 31 is connected to the ball spline 1. The first transmission member 31 has a through hole, and the inner wall of the through hole is an internal gear ring. The second transmission member 32 is a gear. The tensioning shaft 4 is connected to the gear, and the gear meshes with the internal gear ring.

[0050] like Figure 2 and Figure 6 As shown, the transmission assembly 3 includes a first transmission member 31 and a second transmission member 32; the first transmission member 31 and the second transmission member 32 are connected by gear transmission, which can improve the efficiency and high load capacity of the unwinding mechanism 100.

[0051] Specifically, the first transmission component 31 has a through hole, and an internal gear ring is formed inside the through hole; the axis of the internal gear ring is the same as the axis in the X direction; the second transmission component 32 is a gear, which is set in the through hole and meshes with the internal gear ring; the tensioning shaft 4 is connected to the gear; and the first transmission component 31 is connected to the ball spline 1.

[0052] To further explain, the transmission method of embedding the gear into the internal gear ring can improve the transmission stability of the transmission component 3, thereby improving the rotational stability of the tensioning shaft 4; embedding the gear into the internal gear ring makes the structure of the transmission component 3 more compact and saves space; by embedding the gear in the through hole, the first transmission component 31 can provide additional support for the second transmission component 32, increasing the strength and rigidity of the second transmission component 32, thereby reducing the deformation of the tensioning shaft 4 under high load or high speed operation.

[0053] In an optional embodiment, the unwinding mechanism 100 further includes a first mounting base 6, a first support base 8, and a first sliding component 12. The first support base 8 is disposed below the first mounting base 6, and the first support base 8 and the first mounting base 6 are slidably connected through the first sliding component 12. The tensioning shaft 4 is rotatably connected to the first mounting base 6, and the tensioning shaft 4 is rotatable relative to the first mounting base 6 about its own axis.

[0054] like Figure 2As shown, the unwinding mechanism 100 also includes a first mounting base 6, a first support base 8, and a first sliding assembly 12. The tensioning shaft 4 is rotatably connected to the first mounting base 6, and the first mounting base 6 provides support for the tensioning shaft 4 in the Z direction, thereby improving the load capacity of the tensioning shaft 4. The first support base 8 is located below the first mounting base 6, meaning that the first support base 8 is positioned below the first mounting base 6 in the Z direction. The first mounting base 6 and the first support base 8 are slidably connected via the first sliding assembly 12. In other words, the first sliding assembly 12 provides guidance for the movement of the first mounting base 6 relative to the first support base 8 in the X direction, thereby improving the smoothness of the movement of the first mounting base 6 in the X direction, which in turn improves the smoothness of the movement of the tensioning shaft 4 in the X direction.

[0055] In one alternative implementation, such as Figure 2 , Figure 3 and Figure 8 As shown, the unwinding mechanism 100 also includes a lever assembly 11, which is disposed on the first mounting base 6 and connected to the ball spline 1. The lever assembly 11 can drive the ball spline 1 to move along the X direction, thereby adjusting the position of the tensioning shaft 4 in the X direction to achieve deviation correction.

[0056] In an optional embodiment, the unwinding mechanism 100 further includes a second drive component 5, the output end of which is connected to the first mounting base 6. The second drive component 5 is capable of driving the first mounting base 6 to move along the X direction. The second drive component 5 provides power output to adjust the position of the tensioning shaft 4 in the X direction to achieve the correction function.

[0057] In one optional embodiment, the second drive component 5 includes a first drive member 51 and a connector 52. The first drive member 51 is disposed on the first support base 8. One end of the connector 52 is connected to the output end of the first drive member 51, and the other end of the connector 52 is connected to the first mounting base 6. The first drive member 51 can drive the first mounting base 6 to move relative to the first support base 8 in the X direction.

[0058] like Figures 1-6 As shown, the second drive assembly 5 includes a first drive member 51 and a connector 52; wherein, the first drive member 51 is disposed on the first support base 8, that is, the first drive member 51 is located below the first mounting base 6 in the Z direction, one end of the connector 52 is connected to the output end of the first drive member 51, and the other end of the connector 52 is connected to the first mounting base 6; the first drive member 51 can drive the first mounting base 6 to move relative to the first support base 8 in the X direction through the connector 52.

[0059] The first driving member 51 is located below the first mounting base 6 in the Z direction. On the one hand, this makes the structure of the unwinding mechanism 100 more compact. On the other hand, the first driving member 51 is also below the first sliding component 12. When the first driving member 51 drives the first mounting base 6 to move, the first mounting base 6 moves relative to the first sliding component 12 in the X direction. This reduces the force arm of the first mounting base 6 relative to the first sliding component 12, thereby reducing the reverse torque and improving the smoothness of the first mounting base 6 moving in the X direction.

[0060] In one specific implementation, the first drive element 51 may be a linear motor, a hydraulic cylinder, or a pneumatic cylinder.

[0061] In one alternative implementation, such as Figure 3 and Figure 6 As shown, the second drive assembly 5 includes a first limiting part 53 and a second limiting part 54. The first limiting part 53 and the second limiting part 54 are spaced apart in the X direction on the first support base 8. The output end of the first drive member 51 is located between the first limiting part 53 and the second limiting part 54. The output end of the first drive member 51 moves between the first limiting part 53 and the second limiting part 54, thereby limiting the range of movement of the tensioning shaft 4 in the X direction.

[0062] In an optional embodiment, the unwinding mechanism 100 further includes a second mounting base 7, a second support base 9, a second sliding assembly 13, and a connecting rod assembly 10. The second mounting base 7 and the first mounting base 6 are spaced apart along the X direction. The second support base 9 is located below the second mounting base 7. The second sliding assembly 13 is located between the second support base 9 and the second mounting base 7. One end of the connecting rod assembly 10 is connected to the first mounting base 6, and the other end of the connecting rod assembly 10 is connected to the second mounting base 7.

[0063] The tensioning shaft 4 includes a first end 41 and a second end 42. The first end 41 is rotatably connected to the first mounting base 6, and the second end 42 is rotatably connected to the second mounting base 7.

[0064] like Figure 6 and Figure 7 As shown, the tensioning shaft 4 includes a first end 41 and a second end 42, which are located on both sides of the tensioning shaft 4.

[0065] like Figure 4 and Figure 7As shown, the unwinding mechanism 100 also includes a second mounting base 7, a second support base 9, a second sliding assembly 13, and a connecting rod assembly 10; the second mounting base 7 and the first mounting base 6 are spaced apart in the X direction, and the second support base 9 and the first support base 8 are spaced apart in the X direction; the second support base 9 is located below the second mounting base 7, which can be understood as the second support base 9 being located below the second mounting base 7 in the Z direction; the second mounting base 7 and the second support base 9 are connected by the second sliding assembly 13, that is, the second sliding assembly 13 can provide guidance for the movement of the second mounting base 7 relative to the second support base 9 in the X direction; the first end 41 of the tensioning shaft 4 is rotatably connected to the first mounting base 6, and the second end 42 of the tensioning shaft 4 is rotatably connected to the second mounting base 7, wherein the second sliding assembly 13 can improve the smoothness of the movement of the second mounting base 7 in the X direction; the first mounting base 6 and the second mounting base 7 together provide support for the tensioning shaft 4 in the Z direction, improving the load capacity of the tensioning shaft 4.

[0066] To further explain, one end of the linkage assembly 10 is connected to the first mounting base 6, and the other end of the linkage assembly 10 is connected to the second mounting base 7. When the second drive assembly 5 drives the first mounting base 6 to move in the X direction, the second mounting base 7 will move in the X direction under the action of the linkage assembly 10, so that the tension shaft 4 moves as a whole in the X direction. This avoids the force being transmitted to the tension shaft 4 when the second drive assembly 5 drives the first mounting base 6 to move in the X direction, thereby preventing deformation of the tension shaft 4. The linkage assembly 10 can improve the stability of the movement of the tension shaft 4, the first mounting base 6, and the second mounting base 7 in the X direction.

[0067] In an optional embodiment, the first mounting base 6 includes a first mounting portion 61 and a second mounting portion 62; the first mounting portion 61 is provided with a first receiving groove, and the first mounting portion 61 includes a first mounting end and a second mounting end, the first mounting end and the second mounting end being located on both sides of the first receiving groove; the second mounting portion 62 is provided with a second receiving groove, and the second mounting portion 62 includes a third mounting end and a fourth mounting end, the third mounting end and the fourth mounting end being located on both sides of the second receiving groove; the first mounting end and the third mounting end are rotatably connected, the third mounting end and the fourth mounting end are connected by a first snap-fit ​​assembly 63, the first receiving groove and the second receiving groove form a first mounting groove, and the first end 41 is disposed in the first mounting groove.

[0068] like Figure 3 As shown, the first mounting base 6 includes a first mounting part 61 and a second mounting part 62. The first mounting part 61 is located above the second mounting part 62 in the Z direction. The second mounting part 62 is connected to the output end of the second drive member through a connector 52. The second mounting part 62 is slidably connected to the first support base 8 through a first sliding assembly 12.

[0069] The first mounting part 61 is provided with a first receiving groove facing the second mounting part 62. In the Y direction, the first mounting end and the second mounting end are located on both sides of the first receiving groove. The second mounting part 62 is provided with a second receiving groove facing the first mounting part 61. In the Y direction, the third mounting end and the fourth mounting end are located on both sides of the second receiving groove. The first mounting end and the third mounting end are rotatably connected. The connection between the first mounting end and the third mounting end is the first connection point. The first mounting part 61 can rotate around the rotation axis of the first connection point so that the second mounting end and the fourth mounting end abut or separate.

[0070] Further explanation: The first mounting base 6 includes an open state and a closed state. In the open state, the second mounting end and the fourth mounting end are not in contact, allowing the first end 41 of the tensioning shaft 4 to be placed in the second receiving groove. When the open state changes to the closed state, the first mounting part 61 rotates around the rotation axis of the first connection, and the second mounting end contacts the fourth mounting end. The first receiving groove and the second receiving groove form a first mounting groove, and the first end 41 of the tensioning shaft 4 is located in the first mounting groove. The second mounting end and the fourth mounting end are connected by a first snap-fit ​​assembly 63 to lock the second mounting end and the fourth mounting end. In this embodiment, the first mounting part 61 and the second mounting part 62 can be quickly opened and closed, facilitating the quick installation of the tensioning shaft 4 on the first mounting base 6; in other words, it facilitates the loading or unloading of the tensioning shaft 4.

[0071] In an optional embodiment, the second mounting base 7 includes a third mounting portion 71 and a fourth mounting portion 72; the third mounting portion 71 is provided with a third receiving groove 713, and the third mounting portion 71 includes a fifth mounting end 711 and a sixth mounting end 712, which are located on both sides of the third receiving groove 713; the fourth mounting portion 72 is provided with a fourth receiving groove 723, and the fourth mounting portion 72 includes a seventh mounting end 721 and an eighth mounting end 722, which are located on both sides of the fourth receiving groove 723; the fifth mounting end 711 is rotatably connected to the seventh mounting end 721, and the sixth mounting end 712 is connected to the eighth mounting end 722 through a second snap-fit ​​assembly 73; the third receiving groove 713 and the fourth receiving groove 723 form a second mounting groove, and the second end 42 is disposed in the second mounting groove.

[0072] like Figure 8 As shown, the second mounting base 7 includes a third mounting part 71 and a fourth mounting part 72. The third mounting part 71 is located above the fourth mounting part 72 in the Z direction. The fourth mounting part 72 is slidably connected to the second support base 9 through the second sliding assembly 13.

[0073] like Figure 8 As shown, the third mounting part 71 is provided with a third receiving groove 713, which faces the fourth mounting part 72. In the Y direction, the fifth mounting end 711 and the sixth mounting end 712 are located on both sides of the third receiving groove 713. The fourth mounting part 72 is provided with a fourth receiving groove 723, which faces the third mounting part 71. In the Y direction, the seventh mounting end 721 and the eighth mounting end 722 are located on both sides of the fourth receiving groove 723. The fifth mounting end 711 and the seventh mounting end 721 are rotatably connected. The connection between the fifth mounting end 711 and the seventh mounting end 721 is the second connection point. The third mounting part 71 can rotate around the rotation axis of the second connection point so that the sixth mounting end 712 and the eighth mounting end 722 abut or separate.

[0074] Further explanation: The second mounting base 7 includes an open state and a closed state. In the open state, the sixth mounting end 712 and the eighth mounting end 722 are not in contact, allowing the second end 42 of the tensioning shaft 4 to be placed in the fourth receiving groove 723. When the open state changes to the closed state, the third mounting part 71 rotates around the rotation axis of the second connection, and the sixth mounting end 712 contacts the eighth mounting end 722. The third receiving groove 713 and the fourth receiving groove 723 form a second mounting groove, and the second end 42 of the tensioning shaft 4 is located in the second mounting groove. The sixth mounting end 712 and the eighth mounting end 722 are connected by the second snap-fit ​​assembly 73 to lock the sixth mounting end 712 and the eighth mounting end 722. In this embodiment, the third mounting part 71 and the fourth mounting part 72 can be quickly opened and closed, facilitating the quick installation of the tensioning shaft 4 on the second mounting base 7; in other words, it facilitates the loading or unloading of the tensioning shaft 4.

[0075] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A pay-off mechanism, characterized by The first driving assembly comprises an output shaft; A ball spline is connected with the output shaft, and the ball spline can move relative to the output shaft in the X direction; A transmission assembly is arranged on the ball spline; A tensioning shaft is configured to mount a roll, and the tensioning shaft is connected with the transmission assembly. The transmission assembly comprises a first transmission member and a second transmission member, the first transmission member is connected with the ball spline, the first transmission member is provided with a through hole, the inner wall of the through hole is an inner gear ring, the second transmission member is a gear, the tensioning shaft is connected with the gear, and the gear is engaged with the inner gear ring.

2. The unwinding mechanism according to claim 1, characterized in that, The unwinding mechanism further comprises a first mounting seat, a first support seat and a first sliding assembly, the first support seat is arranged below the first mounting seat, the first support seat is slidingly connected with the first mounting seat through the first sliding assembly, the tensioning shaft is rotationally connected with the first mounting seat, and the tensioning shaft can rotate about its own axis relative to the first mounting seat.

3. The unwinding mechanism according to claim 1, wherein The unwinding mechanism further comprises a lever assembly, the lever assembly is arranged on the first mounting seat, the lever assembly is connected with the ball spline, and the lever assembly can drive the ball spline to move in the X direction.

4. The unwinding mechanism according to claim 3, characterized in that, The unwinding mechanism further comprises a second driving assembly, an output end of the second driving assembly is connected with the first mounting seat, and the second driving assembly can drive the first mounting seat to move in the X direction.

5. The unwinding mechanism according to claim 3, wherein The second driving assembly comprises a first driving member and a connecting member, the first driving member is arranged on the first support seat, one end of the connecting member is connected with the output end of the first driving member, the other end of the connecting member is connected with the first mounting seat, and the first driving member can drive the first mounting seat to move in the X direction relative to the first support seat through the connecting member.

6. The unwinding mechanism according to claim 5, wherein The second driving assembly further comprises a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are arranged on the first support seat in the X direction, and the output end of the first driving member is located between the first limiting portion and the second limiting portion.

7. The unwinding mechanism according to claim 6, characterized in that The unwinding mechanism further comprises a second mounting seat, a second support seat, a second sliding assembly and a connecting rod assembly, the second mounting seat is arranged in the X direction away from the first mounting seat, the second support seat is arranged below the second mounting seat, the second support seat is slidingly connected with the second mounting seat through the second sliding assembly, one end of the connecting rod assembly is connected with the first mounting seat, and the other end of the connecting rod assembly is connected with the second mounting seat.

8. The unwinding mechanism according to claim 3, wherein The tensioning shaft comprises a first end and a second end, the first end is rotationally connected with the first mounting seat, and the second end is rotationally connected with the second mounting seat. The first mounting seat comprises:

9. The unwinding mechanism according to claim 8, wherein A first mounting portion is provided with a first accommodating groove, the first mounting portion comprises a first mounting end and a second mounting end, and the first mounting end and the second mounting end are located on two sides of the first accommodating groove; ​ The second mounting part is provided with a second accommodating groove, and comprises a third mounting end and a fourth mounting end located at two sides of the second accommodating groove; The first mounting end is rotationally connected with the third mounting end, the third mounting end is connected with the fourth mounting end through a first buckle assembly, the first accommodating groove and the second accommodating groove form a first mounting groove, and the first end is arranged in the first mounting groove.

10. The unwinding mechanism according to claim 8, wherein The second mounting seat comprises: A third mounting part is provided with a third accommodating groove, and comprises a fifth mounting end and a sixth mounting end located at two sides of the third accommodating groove; A fourth mounting part is provided with a fourth accommodating groove, and comprises a seventh mounting end and an eighth mounting end located at two sides of the fourth accommodating groove; The fifth mounting end is rotationally connected with the seventh mounting end, the sixth mounting end is connected with the eighth mounting end through a second buckle assembly, the third accommodating groove and the fourth accommodating groove form a second mounting groove, and the second end is arranged in the second mounting groove.

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