Pay-off device with constant tension

Abstract

The utility model discloses a pay-off device with constant tension, which belongs to the technical field of cable manufacturing and comprises a fixing frame and an adjusting mechanism, a pay-off roller is mounted on the inner side of the fixing frame, and the adjusting mechanism comprises a pay-off roller and a pay-off roller. In the paying-off process, the surface of the round roller is attached to the surface of a wire strand on the paying-off roller, and the first spring is compressed, so that in the process that the diameter of a wire coil is gradually reduced along with the gradual reduction of the wire strand on the paying-off roller, the round roller synchronously moves downwards along with the reduction of the coil under the action of the first spring; the adjusting assembly can be driven by the moving frame to synchronously move in the vertical direction along with the change of the diameter of the wire coil, and when the position of the wire strand changes in the horizontal direction in the paying-off process, the wire strand can drive the adjusting assembly to synchronously move in the horizontal direction. Therefore, it is guaranteed that the adjusting assembly exerts the same acting force on the wire strand in the paying-off process, and the tension of the wire strand can be adjusted in a self-adaptive mode and is in a constant state in the paying-off process.

Description

Technical Field

[0001] This utility model relates to the field of cable manufacturing technology, specifically to a wire feeding device with constant tension. Background Technology

[0002] In the cable manufacturing process, multiple strands of wire need to be wound into a wire harness according to a predetermined winding method. During the winding of the wire harness, the wire is released through a freely rotating release roller, and a traction device is installed at the end of the wire harness to drive each strand forward in real time. During the release process, the tension of the wire strands needs to be kept within a reasonable range to ensure the stability of the wire harness during release.

[0003] A search revealed that the Chinese patent "An Adjustable Tension Wire Feeding Device" (authorization announcement number CN215755634U) describes a utility model that incorporates an elastic thrust component. In this component, a spring applies an inward thrust to a ball bearing. By adjusting the position of the adjusting bolt within the through hole, the elasticity of the spring is adjusted, and the torque of the torque limiting device is adjusted, thereby regulating the tension of the wire strand. The design is reasonable and convenient to use, allowing for the adjustment and control of the wire feeding tension. Not only can the tension be adjusted as needed, but it also maintains stable tension throughout the entire wire feeding process.

[0004] Although the above application can adjust the tension of the wire feeding, the number of strands on the wire feeding roller will gradually decrease during the wire feeding process, which will cause the diameter of the wire roll on the wire feeding roller to change continuously. The tension adjustment is made by adjusting bolts, which is a complicated process and cannot be adaptive.

[0005] Based on this, the present invention designs a wire feeding device with constant tension to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a wire feeding device with constant tension.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A constant tension wire feeding device includes a fixed frame, a wire feeding roller mounted on the inner side of the fixed frame, and an adjusting mechanism. The adjusting mechanism includes a mounting frame fixedly connected to one side of the fixed frame, two limiting rollers rotatably connected to the inner side of the mounting frame, a lead screw rotatably connected to one side of the top of the mounting frame, a movable plate threadedly connected to the surface of the lead screw, a first spring fixedly connected to the bottom end of the movable plate, a mounting plate fixedly connected to the bottom end of the first spring, a circular roller rotatably connected to one side of the mounting plate, a movable frame fixedly connected to one end of the mounting plate, and an adjusting component slidably connected to the inner wall of the movable frame.

[0009] Furthermore, the adjusting assembly includes an air storage box slidably connected to the inner wall of the movable frame. An extrusion plate and a piston rod are slidably connected to the inner wall of the air storage box. A second spring is fixedly connected between the top end of the extrusion plate and the top end of the piston rod. The bottom end of the piston rod passes through the air storage box and is fixedly connected to a fixed frame. A limit wheel is rotatably connected to the inner wall of the fixed frame. A bolt is threadedly connected to the top end of the air storage box. The bottom end of the bolt passes through the air storage box and is rotatably connected to the top end of the extrusion plate. A connecting pipe communicates with the inner wall of the extrusion plate, and the other end of the connecting pipe passes through the air storage box.

[0010] Furthermore, the overall shape of the connecting pipe is "U" shaped, and a pressure gauge and a solenoid valve are sequentially installed on the surface of the connecting pipe.

[0011] Furthermore, a round rod is fixedly connected to the top of the mounting plate, and the top of the round rod passes through the first spring and the movable plate in sequence.

[0012] Furthermore, there are sliding blocks on both sides of the inner wall of the mounting frame, and the opposite sides of the two sliding blocks are fixedly connected to the two ends of the moving frame, respectively.

[0013] Furthermore, the middle part of the connecting pipe is configured as a corrugated pipe.

[0014] Furthermore, a knob is fixedly connected to the top of the lead screw, and multiple protrusions are fixedly connected to the surface of the knob.

[0015] Furthermore, a slider is fixedly connected to the inner wall of the movable frame, and one side of the slider is fixedly connected to the surface of the gas storage box. Beneficial effects

[0016] In the adjusting mechanism, during the unwinding process, the surface of the circular roller is brought into contact with the surface of the strands on the unwinding roller, and the first spring is compressed. This facilitates the movement of the circular roller downwards synchronously with the decrease in the coil diameter as the number of strands on the unwinding roller gradually decreases. This also facilitates the movement of the adjusting component in the vertical direction, which is driven by the moving frame to follow the change in the coil diameter. Furthermore, when the strands change position in the horizontal direction during the unwinding process, the strands will drive the adjusting component to move synchronously in the horizontal direction. This ensures that the adjusting component applies the same force to the strands during the unwinding process and allows the tension of the strands to be adaptively adjusted and kept constant during the unwinding process.

[0017] The adjustment component allows for the adjustment of the tension of the strands in the initial state, ensuring that the tension remains stable. Furthermore, under the action of the piston rod, the second spring, and the connecting tube, the limit wheel can adaptively adjust itself to follow the tension changes during the wire feeding process, thus improving the practicality of the device. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 The main structure of a wire feeding device with constant tension is three-dimensional. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the adjusting mechanism in a wire feeding device with constant tension.

[0021] Figure 3 A schematic diagram of the moving frame installation structure in a wire feeding device with constant tension;

[0022] Figure 4 This is a schematic diagram of the adjusting component structure in a wire feeding device with constant tension.

[0023] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0024] The labels in the diagram represent:

[0025] 200. Fixed frame; 300. Feeding roller; 310. Adjusting mechanism; 311. Mounting frame; 311. Moving block; 320. Limiting roller; 330. Lead screw; 331. Moving plate; 332. First spring; 333. Knob; 340. Mounting plate; 341. Circular roller; 342. Circular rod; 350. Moving frame; 351. Sliding block; 360. Adjusting assembly; 361. Air tank; 362. Piston rod; 363. Fixed frame; 364. Limiting wheel; 365. Extrusion plate; 366. Bolt; 367. Connecting pipe; 368. Second spring; 370. Pressure gauge; 380. Solenoid valve. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] The present invention will be further described below with reference to the embodiments.

[0028] In some embodiments, please refer to the appendix to the instruction manual. Figure 1-5 A constant tension wire feeding device includes a fixed frame 100, a wire feeding roller 200 mounted on the inner side of the fixed frame 100, and an adjustment mechanism 300. The adjustment mechanism 300 includes a mounting frame 310 fixedly connected to one side of the fixed frame 100, two limiting rollers 320 rotatably connected to the inner side of the mounting frame 310, a lead screw 330 rotatably connected to one side of the top of the mounting frame 310, a movable plate 331 threadedly connected to the surface of the lead screw 330, a first spring 332 fixedly connected to the bottom end of the movable plate 331, a mounting plate 340 fixedly connected to the bottom end of the first spring 332, a circular roller 341 rotatably connected to one side of the mounting plate 340, a movable frame 350 fixedly connected to one end of the mounting plate 340, and an adjustment component 360 slidably connected to the inner wall of the movable frame 350.

[0029] In this embodiment of the utility model, after the wire feeding roller 200 is installed with the fixed frame 100, the center point of the circular roller 341 and the center point of the wire feeding roller 200 are located on the same vertical plane, and the bottom end of the moving frame 350 and the lowest point of the lower end of the surface of the circular roller 341 are on the same horizontal plane. In the initial state of the device, the horizontal height of the lowest point of the adjusting component 360 is lower than the horizontal height of the lowest point of the lower end of the surface of the lower limiting roller 320.

[0030] When using this device for wire feeding, after installing the feeding roller 200, the operator rotates the lead screw 330, causing the moving plate 331 to move downward via the first spring 332, which in turn drives the mounting plate 340 downward. This causes the mounting plate 340 to move the roller 341 and the moving frame 350 downward synchronously. The moving frame 350 also drives the adjusting component 360 to move synchronously. During this downward movement, when the lower end of the roller 341 contacts the wire strands on the feeding roller 200, the roller 341 and the moving frame 350 can no longer move downward. The operator continues to rotate the lead screw 330, causing the moving plate 331 to move downward. At this point, the first spring 332 is compressed and contracts. When the moving plate 331 can no longer move downward, the compression of the first spring 332 is complete. At this point, the rotation of the lead screw 330 is stopped. 0. After this operation is completed, one end of the strand is passed sequentially between the adjusting component 360 and the two limiting rollers 320. The tension of the strand is adjusted using the adjusting component 360. During the unwinding process, as the strand on the unwinding roller 200 gradually decreases and the diameter of the coil gradually decreases, the squeezing force on the circular roller 341 gradually decreases. This causes the first spring 332 to gradually release and drive the circular roller 341 to move downward synchronously with the decrease in coil diameter, always keeping it in contact with the surface of the strand. As the circular roller 341 moves downward, it drives the adjusting component 360 to move synchronously with the change in the coil diameter via the moving frame 350. This ensures that the adjusting component 360 applies the same force to the strand during the unwinding process, thus keeping the tension of the strand constant during the unwinding process.

[0031] In some embodiments, such as Figure 2-5 As shown, in a preferred embodiment of this utility model, the adjusting component 360 includes an air storage box 361 slidably connected to the inner wall of the movable frame 350. An extrusion plate 365 and a piston rod 362 are slidably connected to the inner wall of the air storage box 361. A second spring 368 is fixedly connected between the top end of the extrusion plate 365 and the top end of the piston rod 362. The bottom end of the piston rod 362 extends through the air storage box 361 and is fixedly connected to a fixing frame 363. A limit wheel 364 is rotatably connected to the inner wall of the fixing frame 363. A bolt 366 is threadedly connected to the top end of the air storage box 361. The bottom end of the bolt 366 extends through the air storage box 361 and is rotatably connected to the top end of the extrusion plate 365. A connecting pipe 367 communicates with the inner wall of the extrusion plate 365, and the other end of the connecting pipe 367 extends through the air storage box 361. The connecting pipe 367 has an overall "7" shape, and a pressure gauge 370 and a solenoid valve 380 are sequentially mounted on the surface of the connecting pipe 367.

[0032] In this embodiment of the invention, gas is filled between the bottom end of the extrusion plate 365 and the top end of the piston rod 362. The solenoid valve 380 is in the closed state, and the value on the pressure gauge 370 is constant. When one end of the strand passes between the lower end of the surface of the limiting wheel 364 and the two limiting rollers 320 in sequence, the tension of the strand is adjusted before unwinding. The operator rotates the bolt 366 to drive the extrusion plate 365 to move downward, and pushes the piston rod 362 to move downward synchronously under the action of the second spring 368. This causes the fixed frame 363 to drive the limiting wheel 364 to move downward to adjust the tension of the strand. When the value of the pressure gauge 370 changes during the downward movement of the limiting wheel 364, the bolt 366 can be stopped. At this time, the limiting wheel 364 applies a constant force to the strand under the action of the second spring 368, and the gas between the extrusion plate 365 and the piston rod 362 and the second spring 368 are not squeezed. After the adjustment is completed, the solenoid valve 380 is opened.

[0033] When the wire strand changes position in the horizontal direction during the unwinding process, the wire strand will drive the adjusting component 360 to move synchronously in the horizontal direction. During the unwinding process, when the limiting wheel 364 is squeezed, the limiting wheel 364 pushes the piston rod 362 to move upward and squeeze the gas. The second spring 368 is compressed, and the squeezed gas is discharged from the connecting pipe 367. When the limiting wheel 364 loses its squeezing force, the second spring 368 drives the limiting wheel 364 to reset, and the external gas will flow back into the gas storage tank 361 through the connecting pipe 367.

[0034] The use of bolt 366, pressing plate 365 and second spring 368 helps to adjust the tension of the strands in the initial state by limiting wheel 364. Under the action of piston rod 362, second spring 368 and connecting pipe 367, the limiting wheel 364 can adaptively adjust itself to follow the tension changes of the strands during the unwinding process, thus improving the practicality of the device.

[0035] In some embodiments, such as Figure 3 As shown, in a preferred embodiment of the present invention, a round rod 342 is fixedly connected to the top of the mounting plate 340, and the top of the round rod 342 passes through the first spring 332 and the moving plate 331 in sequence.

[0036] In this embodiment of the utility model, the surface of the round rod 342 is slidably connected to the inner wall of the moving plate 331. When the rotating screw 330 drives the moving plate 331 to move, the round rod 342 will limit the movement path of the moving plate 331, thus ensuring the stability of the connection between the moving plate 331 and the first spring 332 during the movement.

[0037] In some embodiments, such as Figure 4As shown, in a preferred embodiment of the present invention, the inner walls of the mounting bracket 310 are slidably provided with movable blocks 311 on both sides, and the opposite sides of the two movable blocks 311 are fixedly connected to the two ends of the movable frame 350 respectively.

[0038] In this embodiment of the utility model, the inner walls of the mounting bracket 310 are provided with limiting grooves on both sides that match the movement of the moving block 311. Through the cooperation of the limiting grooves and the moving block 311, the movement path of the moving frame 350 is limited, ensuring the stability of the moving frame 350 when it moves up and down.

[0039] In some embodiments, such as Figure 5 As shown, in a preferred embodiment of the present invention, the middle part of the connecting pipe 367 is configured as a corrugated pipe.

[0040] In this embodiment of the utility model, the corrugated part of the connecting pipe 367 is a rubber component. When the extrusion plate 365 is driven to move, the extrusion plate 365 will drive the end of the connecting pipe 367 to move synchronously, so that the position of the corrugated pipe will expand and contract synchronously, ensuring the stability of the connecting pipe 367 when the device is in use.

[0041] In some embodiments, such as Figure 3 As shown, in a preferred embodiment of the present invention, a knob 333 is fixedly connected to the top of the lead screw 330, and a plurality of protrusions are fixedly connected to the surface of the knob 333.

[0042] In this embodiment of the utility model, the operator can drive the lead screw 330 to rotate by turning the knob 333, and the friction force is increased by the action of the protrusion, making it easier to rotate the lead screw 330.

[0043] In some embodiments, such as Figure 5 As shown, in a preferred embodiment of the present invention, a slider 351 is fixedly connected to the inner wall of the movable frame 350, and one side of the slider 351 is fixedly connected to the surface of the gas storage box 361.

[0044] In this embodiment of the utility model, the inner wall of the movable frame 350 is provided with a movable groove that matches the movement of the slider 351. The slider 351 is used to limit the position of the gas storage box 361 in the vertical direction to ensure the stability of the gas storage box 361 when it moves horizontally.

[0045] It should be noted that the solenoid valve 380 and pressure gauge 370 mentioned above are all devices with relatively mature existing technology. The specific model can be selected according to actual needs. At the same time, the solenoid valve 380 and pressure gauge 370 can be powered by the built-in power supply or by the mains power. The specific power supply method should be selected according to the situation, which will not be elaborated here.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wire feeding device with constant tension, comprising a fixed frame (100), wherein a wire feeding roller (200) is mounted on the inner side of the fixed frame (100), characterized in that: It also includes an adjustment mechanism (300), which includes a mounting frame (310) fixedly connected to one side of the fixed frame (100). Two limiting rollers (320) are rotatably connected to the inner side of the mounting frame (310). A lead screw (330) is rotatably connected to one side of the top of the mounting frame (310). A moving plate (331) is threadedly connected to the surface of the lead screw (330). A first spring (332) is fixedly connected to the bottom end of the moving plate (331). A mounting plate (340) is fixedly connected to the bottom end of the first spring (332). A circular roller (341) is rotatably connected to one side of the mounting plate (340). A moving frame (350) is fixedly connected to one end of the mounting plate (340). An adjustment component (360) is slidably connected to the inner wall of the moving frame (350).

2. The tension-constant wire feeding device according to claim 1, characterized in that, The adjusting assembly (360) includes an air storage box (361) slidably connected to the inner wall of the movable frame (350). The inner wall of the air storage box (361) is slidably connected to a pressing plate (365) and a piston rod (362). A second spring (368) is fixedly connected between the top end of the pressing plate (365) and the top end of the piston rod (362). The bottom end of the piston rod (362) passes through the air storage box (361) and is fixedly connected to a fixing frame (363). The inner wall of the fixing frame (363) is rotatably connected to a limit wheel (364). The top end of the air storage box (361) is threadedly connected to a bolt (366). The bottom end of the bolt (366) passes through the air storage box (361) and is rotatably connected to the top end of the pressing plate (365). The inner wall of the pressing plate (365) is connected to a connecting pipe (367). The other end of the connecting pipe (367) passes through the air storage box (361).

3. The tension-constant wire feeding device according to claim 2, characterized in that, The overall shape of the connecting pipe (367) is "7". A pressure gauge (370) and a solenoid valve (380) are sequentially installed on the surface of the connecting pipe (367).

4. The tension-constant wire feeding device according to claim 1, characterized in that, The top end of the mounting plate (340) is fixedly connected to a round rod (342), and the top end of the round rod (342) passes through the first spring (332) and the moving plate (331) in sequence.

5. The tension-constant wire feeding device according to claim 1, characterized in that, The mounting bracket (310) has sliding blocks (311) on both sides of its inner wall, and the opposite sides of the two sliding blocks (311) are fixedly connected to the two ends of the moving frame (350).

6. The tension-constant wire feeding device according to claim 2, characterized in that, The middle part of the connecting pipe (367) is made of corrugated pipe.

7. The tension-constant wire feeding device according to claim 1, characterized in that, A knob (333) is fixedly connected to the top of the lead screw (330), and a plurality of protrusions are fixedly connected to the surface of the knob (333).

8. The tension-constant wire feeding device according to claim 1, characterized in that, The inner wall of the movable frame (350) is fixedly connected to a slider (351), and one side of the slider (351) is fixedly connected to the surface of the gas storage box (361).

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