Mechanical constant tension pay-off reel stand

Abstract

The application discloses a mechanical constant-tension pay-off reel frame and relates to the technical field of reel frames. The mechanical constant-tension pay-off reel frame comprises a reel body, the reel body is rotatably arranged in a reel frame body through a reel support, a tension wheel is fixedly arranged on one side of the reel body, a tension belt is sleeved on the tension wheel, one end of the tension belt is fixed, and the other end of the tension belt is fixedly connected with a tension belt spring; and the mechanical constant-tension pay-off reel frame further comprises a tensioning mechanism, the tensioning mechanism synchronously adjusts the extension and contraction amount of the tension belt spring during a pay-off process, so as to keep the pay-off tension constant. The tension belt is sleeved on the tension wheel, the tension belt spring gives the tension belt a pulling force, the relative friction force between the tension wheel and the tension belt is generated under the action of the pulling force, and then the tension during the pay-off process is kept constant by adjusting the friction force.

Description

Technical Field

[0001] This invention relates to the field of wire reel technology, and more specifically to a mechanical constant tension wire reel. Background Technology

[0002] The existing wire reel frame cannot maintain a stable tension during the wire feeding process. As the metal wire wound on the wire reel frame is continuously fed out, the tension on the metal wire also changes. When the tension is too high or too low, it cannot meet the production process requirements.

[0003] Chinese patent document CN201773697U discloses a coil spool frame, in which a brake is installed next to the spool. The spool frame is equipped with a cylinder and a guide wheel that match the spool. The brake, connected to a precision regulating valve, provides different constant tensions according to different wire gauges. Because the tension is affected by both the brake and the cylinder of the guide wheel, and the pressure on the wire varies depending on the degree of cylinder extension and retraction (if the air pressure in the cylinder does not change, the pressure remains constant during cylinder extension and retraction), the tension can only be relatively stable within a certain range, and cannot achieve constant and precise setting.

[0004] The floating roller feedback yarn tension control device for a disposable warping machine disclosed in Chinese patent document CN103010838A adds a floating roller feedback mechanism between the warp beam drive mechanism and the yarn traction mechanism. This floating roller feedback mechanism serves as the speed control signal for the warp beam variable frequency motor of the warp beam drive mechanism, achieving coordination between the traction mechanism's variable frequency motor and the warp beam's variable frequency motor. This solution has a complex structure, requires a motor, and consumes electrical energy. Furthermore, because the variable frequency motor speed is controlled via feedback after the yarn tension changes, the system exhibits significant lag, meaning the tension is actually in a state of small, real-time change. Summary of the Invention

[0005] The purpose of this invention is to provide a mechanical constant tension wire reel holder, which solves the following technical problems:

[0006] In existing technology, tension is affected by both the brake and the cylinder of the guide wheel. However, the pressure generated on the line varies depending on the degree of cylinder extension and retraction (if the air pressure in the cylinder does not change, the pressure remains constant during cylinder extension and retraction). This can only make the tension relatively stable within a certain range, and it is impossible to achieve constant and precise setting.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A mechanical constant tension wire reel frame includes a wire reel body, which is rotatably mounted in the wire reel frame body via a wire reel support.

[0009] A tension wheel is fixedly arranged on one side of the coil body, and a tension belt is sleeved on the tension wheel;

[0010] One end of the tension band is fixed, and the other end is fixedly connected to the tension band spring;

[0011] It also includes a tensioning mechanism, which synchronously adjusts the extension and retraction of the tension band spring during the unwinding process to maintain a constant unwinding tension.

[0012] Preferably, the rewinding diameter D of the metal wire on the spool body during the wire feeding process is linearly related to the extension and contraction X of the tension band spring during the wire feeding process.

[0013] Preferably, the tensioning mechanism includes a rotating shaft rotatably arranged in the wire reel frame, a small rewinding wheel fixedly arranged on the rotating shaft, a first base strip wound on the small rewinding wheel, one end of the first base strip being fixed to the small rewinding wheel, and the other end being fixed to the tension band spring.

[0014] Preferably, a large rewinding wheel is also fixedly arranged on the rotating shaft, and a second base strip is wound on the large rewinding wheel;

[0015] A positioning plate is also fixedly installed in the coil frame. The positioning plate has through holes and a steering wheel can be rotatably installed on the side of the positioning plate facing the coil body.

[0016] Preferably, the second base strip passes through the through hole and is wound around the steering wheel. The end of the second base strip is fixed to the pressure wheel bracket, and the end of the pressure wheel bracket is connected to the pressure wheel that is pressed against the metal wire.

[0017] Preferably, the bottom of the positioning plate is also provided with a guide rod, and the pressure roller bracket can be slidably sleeved on the guide rod.

[0018] Preferably, the guide rods are arranged in two sets.

[0019] Preferably, a cam mechanism is also fixedly arranged on the other side of the rotating shaft, with the end of the cam mechanism fixedly connected to an auxiliary tension spring, and the other end of the auxiliary tension spring fixedly connected to a positioning plate.

[0020] The beneficial effects of this invention are:

[0021] (1) The present invention uses a tension belt on a tension wheel, and the tension belt spring applies a tension force to the tension belt. Under the action of the tension force, a relative frictional force is generated between the tension wheel and the tension belt, and the tension is kept constant during the unwinding process by adjusting the magnitude of the frictional force.

[0022] (2) When the second base strip of the present invention is moved by pulling the pressure roller bracket, the pressure roller bracket slides on the guide rod. In this embodiment, the pressure roller bracket is guided by the arrangement of guide rods to improve the stability of the pressure roller bracket movement. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the structure of a mechanical constant tension wire reel frame according to the present invention;

[0025] Figure 2 This is a side view of a mechanical constant tension wire reel frame according to the present invention.

[0026] Figure 3 This is a top view schematic diagram of a mechanical constant tension wire reel frame according to the present invention;

[0027] Figure 4 This is a cross-sectional structural schematic diagram of a mechanical constant tension wire reel frame according to the present invention;

[0028] Figure 5 This is a schematic diagram of the auxiliary tension spring in a mechanical constant tension wire reel frame according to the present invention.

[0029] In the diagram: 1. Wire reel frame; 2. Wire reel body; 3. Tension wheel; 4. Tension belt; 5. Steering wheel; 6. Second base belt; 7. Tension belt spring; 8. Small rewinding wheel; 9. Large rewinding wheel; 10. Guide rod; 11. Pressure wheel bracket; 12. Auxiliary tension spring; 13. Pressure wheel; 14. Wire reel support; 15. Rotating shaft; 16. Through hole; 17. Positioning plate; 18. First base belt; 19. Cam mechanism. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] Please see Figures 1-2 As shown, the present invention is a mechanical constant tension wire reel frame, including a wire reel body 2, which is rotatably arranged in the wire reel frame body 1 via a wire reel support 14.

[0033] In one embodiment of this invention, a metal wire is wound onto the coil body 2. The metal wire can be a steel wire or the like, and there is no limitation on this.

[0034] A tension wheel 3 is fixedly arranged on one side of the reel body 2, and a tension belt 4 is sleeved on the tension wheel 3. One end of the tension belt 4 is fixed, and the other end is fixedly connected to the tension belt spring 7. It can be explained that in this embodiment, by sleeved on the tension wheel 3, the tension belt spring 7 applies a tension force to the tension belt 4. Under the action of the tension force, a relative frictional force is generated between the tension wheel 3 and the tension belt 4. The tension is kept constant during the unwinding process by adjusting the magnitude of the frictional force.

[0035] It also includes a tensioning mechanism, which synchronously adjusts the extension and retraction of the tension band spring 7 during the wire feeding process to maintain a constant wire feeding tension. It can be explained that as the wire is fed, the amount of wire wound on the reel body 2 gradually decreases, thereby increasing the tension on the wire. In this embodiment, the tensioning mechanism synchronously adjusts the tension band spring 7, reducing the tension force of the tension band spring 7 on the tension band 4, and simultaneously reducing the relative friction between the tension band 4 and the tension wheel 3, thus maintaining a constant tension during the wire feeding process.

[0036] In this embodiment, the rewinding diameter D of the metal wire on the reel body 2 during the wire feeding process is linearly related to the extension and contraction X of the tension band spring 7 during the wire feeding process. It can be explained that as the metal wire is fed out, the rewinding diameter D of the metal wire on the reel body 2 gradually decreases. When the rewinding diameter D is linearly related to the extension and contraction X of the tension band spring 7 during the wire feeding process, the wire feeding tension remains constant.

[0037] Example 2

[0038] Based on Example 1, please refer to Figures 3-4 The tensioning mechanism includes a rotating shaft 15 rotatably mounted in the wire reel frame 1. A small rewinding wheel 8 is fixedly mounted on the rotating shaft 15. A first base strip 18 is wound on the small rewinding wheel 8. One end of the first base strip 18 is fixed to the small rewinding wheel 8, and the other end is fixed to the tension band spring 7. It can be explained that when adjusting the extension amount X of the tension band spring 7, the rotating shaft 15 drives the small rewinding wheel 8 to rotate. During the rotation, the small rewinding wheel 8 reduces the extension amount of the tension band spring 7 by unwinding the length of the first base strip 18.

[0039] As a further embodiment, a large rewinding wheel 9 is fixedly arranged on the rotating shaft 15, and a second base strip 6 is wound on the large rewinding wheel 9. A positioning plate 17 is also fixedly arranged in the wire reel frame 1, and a through hole 16 is opened on the positioning plate 17. A steering wheel 5 is rotatably arranged on the side of the positioning plate 17 facing the wire reel body 2. The second base strip 6 passes through the through hole 16 and is wound onto the steering wheel 5. The end of the second base strip 6 is fixed to the pressure wheel bracket 11, and the end of the pressure wheel bracket 11 is connected to the pressure wheel 13 pressing the metal wire. It can be noted that in this embodiment, the pressure wheel 13 is used to press the wire reel body. On the metal wire on 2, the rewinding diameter D of the metal wire gradually decreases during the unwinding process. Therefore, under the elastic force of the tension band spring 7, the small rewinding wheel 8 is driven to rotate by the first base belt 18. When the small rewinding wheel 8 rotates, it drives the large rewinding wheel 9 to rotate. The large rewinding wheel 9 drives the pressure wheel bracket 11 to move towards the positioning plate 17 through the second base belt 6, so that the pressure wheel 13 always maintains a pressing state with the metal wire on the wire reel body 2. The metal wire synchronously provides a limiting effect to the pressure wheel 13, restricting the pressure wheel 13 from continuing to move. At the same time, the tension band spring 7 is kept in the same extension and contraction state.

[0040] Please see Figure 5 Furthermore, the bottom of the positioning plate 17 is also provided with guide rods 10, and the pressure roller bracket 11 is slidably sleeved on the guide rods 10; specifically, in this embodiment, two sets of guide rods 10 are provided; it can be explained that when the second base belt 6 pulls the pressure roller bracket 11 to move, the pressure roller bracket 11 slides on the guide rods 10. In this embodiment, the movement of the pressure roller bracket 11 is guided by the guide rods 10 to improve the stability of the movement of the pressure roller bracket 11;

[0041] It should be noted that a cam mechanism 19 is also fixedly arranged on the other side of the rotating shaft 15. The end of the cam mechanism 19 is fixedly connected to the auxiliary tension spring 12, and the other end of the auxiliary tension spring 12 is fixedly connected to the positioning plate 17. It can be explained that as the metal wire is continuously unloaded, the length of the tension band spring 7 gradually decreases, which in turn causes its elasticity to gradually decrease. In order to prevent the elasticity of the tension band spring 7 from being insufficient to support the pulling of the pressing wheel 13 to press against the metal wire, this embodiment provides an auxiliary elasticity by arranging the auxiliary tension spring 12, so that the pressing wheel 13 can be tightly pressed against the metal wire, making it more stable.

[0042] In this embodiment, in order to determine the elastic coefficient of the tension belt spring 7, the diameter of the tension wheel 3 is determined to be d, the friction coefficient between the tension belt 4 and the tension wheel 3 is determined to be f, the wrap angle of the tension belt 4 is determined to be α, the diameter of the small rewinding wheel 8 is determined to be d1, and the diameter of the large rewinding wheel 9 is determined to be d2.

[0043] The speed ratio of the large compound wheel 9 to the small compound wheel 8 is: n = d2 / d1;

[0044] The constant tension of the wire is determined to be F, the stiffness of the tension band spring 7 is determined to be k, the full diameter of the metal wire on the wire reel body 2 is determined to be D0, and the extension and retraction of the tension band spring 7 when the reel is full is determined to be X0.

[0045] The extension and retraction of tension belt spring 7 during the wire laying process is: X=X0-(D0-D) / 2n=X0-(D0-D) / d1 / 2d2;

[0046] From the calculation formula for belt drive, we get:

[0047] Tension band 4 tight side tension: F 紧 =F 弹簧 =k*X;

[0048] Tension band 4 slack side tension: F 松 =F 紧 / e αf =k*X / e α；

[0049] Tension belt 4 circumferential friction force: F f =F 紧 -F 松 =kX(1-1 / e αf );

[0050] Tension when the wire is fully laid out: F = F f *d / D0=k*X0*(1-1 / e αf )*d / D0;

[0051] Tension during the laying process: F = F f *d / D=k*X*(1-1 / e αf )*d / D=k*[X0-(D0-D)d1 / 2d2)]*(1-1 / e αf )*d / D;

[0052] Since the tension remains constant during the unwinding process, therefore: k*X0*(1-1 / e αf )*d / D0=k*(X0-(D0-D)d1 / 2d2)*(1-1 / e αf )*d / D

[0053] X0 / D0=[X0-(D0-D)d1 / 2d2] / D

[0054] The calculation yields: X0 = D0d1 / 2d2;

[0055] Therefore, when the reel is full, the extension / retraction of the tension spring X0 = D0d1 / 2d2 can achieve constant tension during the unwinding process from a full reel to an empty reel.

[0056] Friction force of tension plate when the plate is full: F = F f *d / D0=k*X0*(1-1 / e αf )*d / D0=k*(D0d1 / 2d2)*(1-1 / e αf )*d / D0

[0057] The calculation yields: k = F / d(d1 / 2d2)(1-1 / e αf ).

[0058] The working principle of this invention is as follows: As the metal wire is unwound, the amount of metal wire wound on the reel body 2 gradually decreases, thereby increasing the tension on the metal wire. During the unwound process, the rewinding diameter D of the metal wire gradually decreases. Therefore, under the elastic force of the tension band spring 7, the small rewinding wheel 8 is driven to rotate through the first base belt 18. When the small rewinding wheel 8 rotates, it drives the large rewinding wheel 9 to rotate. The large rewinding wheel 9 drives the pressure wheel bracket 11 to move towards the positioning plate 17 through the second base belt 6, so that the pressure wheel 13 always maintains a pressing state with the metal wire on the reel body 2. The metal wire synchronously provides a limiting effect to the pressure wheel 13, restricting the pressure wheel 13 from continuing to move. At the same time, the tension band spring 7 is kept in the same extension and contraction state. The rewinding diameter D is linearly related to the extension and contraction X of the tension band spring 7 during the unwound process, so as to keep the tension constant during the direction of the metal wire.

[0059] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0060] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0061] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A mechanical constant tension wire reel frame, comprising a wire reel body (2), wherein the wire reel body (2) is rotatably arranged in the wire reel frame body (1) via a wire reel support (14); Its features are, A tension wheel (3) is fixedly arranged on one side of the coil body (2), and a tension belt (4) is sleeved on the tension wheel (3); Wherein, one end of the tension band (4) is fixed, and the other end is fixedly connected to the tension band spring (7); It also includes a tensioning mechanism, which synchronously adjusts the extension and retraction of the tension band spring (7) during the wire feeding process to maintain a constant wire feeding tension; During the wire feeding process, the rewinding diameter D of the metal wire on the wire reel body (2) is linearly related to the extension and retraction X of the tension band spring (7) during the wire feeding process; The tensioning mechanism includes a rotating shaft (15) rotatably arranged in the wire reel frame (1), a small rewinding wheel (8) is fixedly arranged on the rotating shaft (15), a first base belt (18) is wound on the small rewinding wheel (8), one end of the first base belt (18) is fixed to the small rewinding wheel (8), and the other end is fixed to the tension belt spring (7); A large rewinding wheel (9) is also fixedly arranged on the rotating shaft (15), and a second base belt (6) is wound on the large rewinding wheel (9). A positioning plate (17) is fixedly arranged in the coil frame (1). The positioning plate (17) has a through hole (16). A steering wheel (5) is rotatably arranged on the side of the positioning plate (17) facing the coil body (2).

2. The mechanical constant tension wire reel frame according to claim 1, characterized in that, The second base strip (6) passes through the through hole (16) and is wound around the steering wheel (5). The end of the second base strip (6) is fixed to the pressure wheel bracket (11), and the end of the pressure wheel bracket (11) is connected to the pressure wheel (13) pressed on the metal wire.

3. A mechanical constant tension wire reel frame according to claim 2, characterized in that, The bottom of the positioning plate (17) is also provided with a guide rod (10), and the pressure roller bracket (11) can be slidably sleeved on the guide rod (10).

4. A mechanical constant tension wire reel frame according to claim 3, characterized in that, The guide rod (10) is provided in two sets.

5. A mechanical constant tension wire reel frame according to claim 3, characterized in that, A cam mechanism (19) is also fixedly arranged on the other side of the rotating shaft (15). The end of the cam mechanism (19) is fixedly connected to the auxiliary tension spring (12), and the other end of the auxiliary tension spring is fixedly connected to the positioning plate (17).

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