A cable pay-off device

Abstract

The present invention provides a cable pay-off device, which relates to the technical field of cable pay-off, and includes: a bracket and a storage roller; the bracket is fixedly connected with a control oil cylinder, the driving shaft of the control oil cylinder is fixedly connected with a fixed plate, a support wheel is rotatably arranged on the fixed plate, the cable abuts against the side wall of the support wheel, and the external tension pulls the cable out at a uniform speed in the vertical direction. When the cable wound on different parts of the storage roller is paid out, the support wheel can adapt to the tension of the cable and the thrust of the control oil cylinder to move in the vertical direction, so that the cable can be perpendicular to the central axis of the storage roller; the lower bottom surface of the storage roller is fixedly connected with a friction plate, the bottom of the bracket is fixedly connected with a first linear driver, and the driving shaft of the first linear driver is fixedly connected with a friction block that can abut against the friction plate. The present invention has the effect of reducing the friction phenomenon when the cable is paid out and the probability of the cable being excessively bent.

Description

Technical Field

[0001] The invention relates to the technical field of cable pay-off, and in particular to a cable pay-off device. Background Art

[0002] Cable is a rope-like transmission medium made of one or more mutually insulated wires twisted together, and each group of wires is precisely insulated. During the production process of the cable, a highly insulating covering layer needs to be wrapped around the outer side of the cable. Before wrapping the insulating layer, the already twisted cable must be unwound, which requires the assistance of a cable unwinding machine. The common cable unwinding machine design on the market is to wind the cable on a reel, and the reel is mounted on a stable bracket through a rotating device to achieve cable unwinding.

[0003] When paying out the cable, the positioning guide wheel used for paying out the cable is generally fixed, and the cable wrapped on the pay-out roller will form a certain angle with the positioning guide wheel when released. When the angle is too large, the cable will rub against the cable that has not been led out when being pulled. In severe cases, it will cause wear and bending of the cable, causing damage to the cable, so a device is needed to avoid this situation.

[0004] For example, in the Chinese patent application document with publication number CN115959523A, entitled A Cable Production Releaser, while releasing the cable, the axial movement of the cable along the storage shaft will form a certain angle with the hollow rubber roller. When a certain angle is formed, the hollow rubber roller will be subjected to tension from the side of the cable, and this tension will drive the sliding block to slide in the slide groove, thereby driving the hollow rubber roller to move, thereby preventing the cable from being damaged and excessively bent due to friction caused by excessively large angles during release.

[0005] With regard to the above-mentioned related technologies, since the hollow rubber roller is moved by the pulling force from the side of the cable, assuming that the source of the pulling force is located at the end of the hollow rubber roller away from the storage shaft, since the source of the pulling force remains unchanged, when the cable pulls the hollow rubber roller to move, a straight line is always formed between the cable on the storage shaft and the source of the pulling force, and the hollow rubber roller is located in the middle of the straight line. Because the hollow rubber roller moves passively driven by the cable, it is difficult for the hollow rubber roller to adjust the cable pay-off angle. At this time, the cable will still bend and have friction. Summary of the invention

[0006] In view of this, the present invention provides a cable pay-out device, which aims to solve the technical problems of bending and friction when the cable is paid out.

[0007] In order to solve the above technical problems, the present invention provides a cable pay-out device, comprising a bracket and a storage roller; the bracket is fixedly connected to a control cylinder, the driving shaft of the control cylinder is fixedly connected to a fixed plate, a support wheel is rotatably provided on the fixed plate, the cable abuts against the side wall of the support wheel, and the external tension pulls the cable out at a uniform speed in the vertical direction. When the cable wound on different parts of the storage roller is paid out, the support wheel can adapt to the tension of the cable and the thrust of the control cylinder to move in the vertical direction, so that the cable can be perpendicular to the central axis of the storage roller; the lower bottom surface of the storage roller is fixedly connected to a friction plate, the bottom of the bracket is fixedly connected to a first linear drive, and the driving shaft of the first linear drive is fixedly connected to a friction block that can abut against the friction plate.

[0008] By adopting the above technical scheme, the external pulling force on the cable is coordinated with the thrust of the control cylinder, and the change in the angle between the cables on both sides of the support wheel causes the change in the direction of the pulling force of the storage roller on the cable. When the cables wrapped around different axial positions of the storage roller are paid out, the resultant force on the support wheel in the vertical direction will change, so that the support wheel can adaptively move in the vertical direction, and the cable between the support wheel and the storage roller can remain perpendicular to the central axis of the storage roller, reducing the probability of excessive bending and friction of the cable when it is paid out.

[0009] Optionally, a second linear actuator is horizontally fixedly connected to the lower end of the bracket, a driving shaft of the second linear actuator is fixedly connected to a sliding frame, the sliding frame is slidably connected to the bracket, and the storage roller is rotatably connected to the sliding frame.

[0010] By adopting the above technical solution, the friction block moves relative to the friction plate close to the central axis of the storage roller, so that the distance between the cable located in the outermost circle and the central axis of the storage roller is equal to the distance between the friction block and the central axis of the storage roller. Therefore, in the process of reducing the number of cable turns on the storage roller, the sum of the external torques on the storage roller is zero, which is conducive to the storage roller always maintaining a uniform rotation.

[0011] Optionally, a limiting roller is rotatably connected to the bracket, and the limiting roller is arranged at an end of the storage roller away from the second linear drive, and the outer side surface of the limiting roller can abut against the cable.

[0012] By adopting the above technical solution, the limiting roller gives feedback on the distance that the second linear drive needs to push the storage roller, and the friction plate moves synchronously with the storage roller, which is conducive to keeping the distance between the friction block and the central axis of the storage roller equal to the distance between the outermost circle cable and the central axis of the storage roller.

[0013] Optionally, the upper end of the bracket is rotatably connected to a guide wheel, and the guide wheel abuts against the cable.

[0014] Optionally, a connecting plate is fixedly connected to the side wall of the fixed plate, a clamping plate is slidably connected to the lower end of the connecting plate, and a clamping wheel is rotatably connected to the clamping plate.

[0015] By adopting the above technical solution, the control cylinder drives the supporting wheel and the clamping wheel to move downward through the supporting plate, the connecting plate and the clamping plate until the clamping plate abuts against the upper surface of the bracket, and the supporting wheel and the connecting plate move synchronously close to the clamping wheel, so that the supporting wheel and the clamping wheel cooperate to clamp the cable, which is beneficial to keep the cable in a taut state.

[0016] Optionally, the connecting plate is vertically provided with a waist-shaped groove, and the clamping plate is connected to the connecting plate via the waist-shaped groove.

[0017] Optionally, a damping block is fixedly connected between the clamping plate and the clamping wheel.

[0018] By adopting the above technical solution, the damping block damps the rotation of the clamping wheel, so that the clamping wheel cooperates with the supporting wheel to tighten the cable, so that the cable can still be stably released after it is separated from the storage roller.

[0019] Optionally, a weight-reducing cavity is provided inside the storage roller, and a reinforcing rod is fixedly connected to the inner side surface of the weight-reducing cavity.

[0020] In summary, compared with the prior art, the present invention includes at least one of the following beneficial technical effects:

[0021] 1. The external pulling force on the cable is matched with the thrust of the control cylinder, and the change in the angle between the cables on both sides of the support wheel causes the change in the pulling direction of the cable by the take-up roller. When the cables wound on different axial positions of the take-up roller are released, the resultant force on the support wheel in the vertical direction will change, so that the support wheel can adaptively move in the vertical direction, and the cable between the support wheel and the take-up roller can remain perpendicular to the central axis of the take-up roller, reducing the probability of excessive bending and friction of the cable when it is released.

[0022] 2. The cable is subjected to external tension, which drives the storage roller to rotate. When the external tension of the cable changes, the first linear actuator can change the friction between the friction block and the friction plate by applying different pressures to the friction block, so that the resistance of the storage roller is adapted to the different external tensions on the cable, which is beneficial to the uniform rotation of the storage roller and improves the stability of cable payout.

[0023] 3. The friction block moves relative to the friction plate close to the central axis of the take-up roller, so that the distance between the outermost cable and the central axis of the take-up roller is equal to the distance between the friction block and the central axis of the take-up roller. As a result, in the process of reducing the number of cable turns on the take-up roller, the sum of the external torques on the take-up roller is zero, which is conducive to the take-up roller always maintaining a uniform rotation speed and improving the stability of cable pay-off. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the storage roller and the limiting roller in an embodiment of the present invention;

[0026] Figure 3 It is a schematic structural diagram of a friction plate and a friction block according to an embodiment of the present invention;

[0027] Figure 4 This is a force analysis diagram when the angle between the cables on both sides of the support wheel of the embodiment of the present invention is a right angle;

[0028] Figure 5 This is a force analysis diagram when the angle between the cables on both sides of the support wheel of the embodiment of the present invention is an acute angle;

[0029] Figure 6 This is a force analysis diagram when the angle between the cables on both sides of the support wheel of the embodiment of the present invention is an obtuse angle;

[0030] Figure 7 It is a schematic structural diagram of a connecting plate and a clamping plate according to an embodiment of the present invention.

[0031] Explanation of the accompanying drawings: 1. bracket; 11. guide wheel; 2. storage roller; 21. friction plate; 22. weight reduction chamber; 23. reinforcement rod; 3. control cylinder; 31. fixing plate; 32. support wheel; 4. cable; 5. first linear drive; 51. friction block; 6. second linear drive; 61. sliding frame; 7. limiting roller; 8. connecting plate; 81. clamping plate; 82. clamping wheel; 83. waist-shaped groove; 84. damping block. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 7 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0033] This embodiment provides a cable pay-off device, referring to Figure 1 A cable pay-off device includes a bracket 1, a receiving roller 2, a control cylinder 3, a fixed plate 31, a support wheel 32, a friction plate 21, a first linear drive 5 and a friction block 51. The bracket 1 is erected on a horizontal plane, the receiving roller 2 is rotatably connected to the bracket 1, a weight-reducing chamber 22 is provided inside the receiving roller 2, a reinforcing rod 23 is fixedly connected to the inner side of the weight-reducing chamber 22, and a cable 4 is wound around the outer side of the receiving roller 2. The control cylinder 3 is vertically fixedly connected to the upper end of the bracket 1. A pressure compensation pump and a pressure control valve are arranged inside the control cylinder 3, and the pressure compensation pump delivers hydraulic oil to the inside of the control cylinder 3, increases the pressure inside the control cylinder 3 so that the drive shaft of the control cylinder 3 pushes an external object. The pressure control valve will detect that the pressure inside the control cylinder 3 exceeds the set value and start to unload, that is, let the excess hydraulic oil flow back to the oil tank to maintain the system within the set pressure range, which is the prior art.

[0034] Reference Figure 1 The fixing plate 31 is fixedly connected to the driving shaft of the control oil cylinder 3, the support wheel 32 is rotatably connected to the fixing plate 31, the cable 4 abuts against the bottom end of the side wall of the support wheel 32, and the external tension tightens the cable 4, and the external tension pulls the cable 4 out at a uniform speed in the vertical upward direction. The control oil cylinder 3 can push the cable 4 downward through the fixing plate 31 and the support wheel 32, and the thrust of the control oil cylinder 3 pushing the cable 4 downward is equal to the vertical upward pulling force on the cable 4.

[0035] Reference Figure 2 and Figure 3 The friction plate 21 is fixedly connected to the bottom surface of the storage roller 2. The friction plate 21 is circular and coaxially arranged with the storage roller 2. The first linear actuator 5 is vertically fixedly connected to the lower end of the bracket 1. The friction block 51 is fixedly connected to the driving shaft of the first linear actuator 5. The first linear actuator 5 pushes the friction block 51 upward to abut against the friction plate 21, so that the friction block 51 provides resistance to the rotation of the storage roller 2 through the friction plate 21. The resistance is equal to the external pulling force on the cable 4, so that the storage roller 2 can rotate at a constant speed, improving the stability of the cable 4 being released. In addition, a spring damper or a hydraulic damper can also be used to provide resistance to the storage roller 2.

[0036] Reference Figure 4 , the operator pulls the cable 4 upwards, pulls the cable 4 upwards from the receiving roller 2 to release the cable, and the cable 4 abuts against the bottom end of the side wall of the support wheel 32. The cable 4 is tightened and distributed on the left and right sides of the support wheel 32. With the support wheel 32 as the center, the cable 4 is pulled out at a uniform speed, and the tension on the cable 4 on the left side of the support wheel 32 is F 1 The resistance of the storage roller 2 is transmitted to the cable 4 on the right side of the support wheel 32, and the cable 4 on the right side of the support wheel 32 is subjected to a tensile force F 2 , and F 1 With F2 Equal to and equal to the thrust F of the control cylinder 3 pushing the cable 4 downward 3 When the cables 4 on the left and right sides of the support wheel 32 are perpendicular to each other, F 1 With F 3 Equal balance, control the fixed connection force between the cylinder 3 and the bracket 1 and F 2 Balance, at this time, the support wheel 32 remains stationary relative to the bracket 1 in the vertical direction.

[0037] Reference Figure 5 When the cable 4 wound on the upper end of the take-up roller 2 is unwound, the angle between the cables 4 on the left and right ends of the support wheel 32 is an acute angle, and the tension F on the cable 4 on the left side of the support wheel 32 is 1 The tension F on the right cable 4 of the support wheel 32 remains unchanged. 2 The vertical force F acting on the support wheel 32 is 4 F 2 The vertical component of force and F 1 The sum of the vertical force F exerted on the support wheel 32 is 3 unchanged, and F 1 With F 2 are equal to the thrust F of the first linear drive 5 pushing the cable 4 downward. 3 , so F 4 Greater than F 3 As a result, the combined force on the supporting wheel 32 as a whole is directed vertically upward, so that the supporting wheel 32 moves upward until the cables 4 on the left and right sides of the supporting wheel 32 are perpendicular to each other.

[0038] Reference Figure 6 When the cable 4 wound around the lower end of the take-up roller 2 is unwound, the angle between the cables 4 at the left and right ends of the support wheel 32 is an obtuse angle, and the tension F on the cable 4 on the left side of the support wheel 32 is 1 The tension F on the right cable 4 of the support wheel 32 remains unchanged. 2 The vertical force F on the support wheel 32 is downward. 1 The vertical force F acting on the support wheel 32 is unchanged. 5 F 2 The vertical downward force and F 3 The sum of F 1 With F 2 are equal to the thrust F of the first linear drive 5 pushing the cable 4 downward. 3 , so F 5 Greater than F 1 As a result, the combined force on the support wheel 32 as a whole is directed vertically downward, so that the support wheel 32 moves downward until the cables 4 on the left and right sides of the support wheel 32 are perpendicular to each other.

[0039] The external pulling force on the cable 4 is coordinated with the thrust of the control cylinder 3, and the angle between the cables 4 on both sides of the support wheel 32 changes, so that the direction of the pulling force of the storage roller 2 on the cable 4 changes. When the cables 4 wound on different axial positions of the storage roller 2 are paid out, the size of the resultant force on the support wheel 32 in the vertical direction will change, so that the support wheel 32 can adaptively move in the vertical direction, so that the cable 4 between the support wheel 32 and the storage roller 2 can remain perpendicular to the central axis of the storage roller 2, reducing the probability of excessive bending and friction of the cable 4 when the cable 4 is paid out.

[0040] The cable 4 is subjected to external tension, which drives the storage roller 2 to rotate. When the external tension of the cable 4 changes, the first linear driver 5 can change the magnitude of the friction between the friction block 51 and the friction plate 21 by applying different magnitudes of pressure to the friction block 51, so that the resistance exerted on the storage roller 2 is adapted to the different magnitudes of external tension exerted on the cable 4, which is beneficial to the uniform rotation of the storage roller 2.

[0041] Reference Figure 1 The upper end of the bracket 1 is rotatably connected to a guide wheel 11. After the cable 4 is pulled upward, it abuts against the side wall of the guide wheel 11, so that the cable 4 is pulled out horizontally, so that the cable 4 can adapt to the position of the next workstation and change the moving direction.

[0042] Reference Figure 2 and Figure 3 The lower end of the bracket 1 is horizontally fixedly connected with a second linear actuator 6, the driving shaft of the second linear actuator 6 is fixedly connected with a sliding frame 61, the sliding frame 61 is horizontally slidably connected to the bracket 1, and the storage roller 2 is rotatably connected to the sliding frame 61.

[0043] During the process of pulling out the cable 4, the number of turns of the cable 4 on the receiving roller 2 is small, so the distance between the cable 4 on the outermost turn of the receiving roller 2 and the central axis of the receiving roller 2 gradually decreases. The second linear actuator 6 drives the receiving roller 2 to move near the friction block 51 in the horizontal direction through the sliding frame 61, and the friction block 51 moves near the central axis of the receiving roller 2 relative to the friction plate 21, so that the distance between the cable 4 on the outermost turn and the central axis of the receiving roller 2 is kept equal to the distance between the friction block 51 and the central axis of the receiving roller 2, and then the friction force between the friction block 51 and the friction plate 21 is equal to the external pulling force of the cable 4, so that the torque of the friction force between the friction block 51 and the friction plate 21 is equal to the torque of the pulling force on the cable 4 on the outer turn of the receiving roller 2, so that during the process of reducing the number of turns of the cable 4 on the receiving roller 2, the sum of the external torques on the receiving roller 2 is zero, which is conducive to the receiving roller 2 always maintaining a uniform rotation.

[0044] Reference Figure 2, the bracket 1 is rotatably connected with a limit roller 7, which is arranged at one end of the receiving roller 2 away from the second linear actuator 6, and the second linear actuator 6 continuously pushes the receiving roller 2 through the sliding frame 61, so that the outer side of the limit roller 7 abuts against the cable 4 of the outermost circle of the receiving roller 2. When the number of turns of the cable 4 on the receiving roller 2 gradually decreases, the receiving roller 2 is continuously pushed by the second linear actuator 6 to move until the outer side of the limit roller 7 abuts against the cable 4 of the outermost circle of the receiving roller 2, thereby the limit roller 7 gives feedback on the distance that the second linear actuator 6 needs to push the receiving roller 2 to move, and the friction plate 21 moves synchronously with the receiving roller 2, thereby enabling the friction block 51 to automatically move relative to the friction plate 21 when the cable 4 is separated from the receiving roller 2, and the distance that the friction block 51 moves toward the central axis of the receiving roller 2 is always equal to the diameter of the cable 4 separated from the receiving roller 2, that is, the distance between the friction block 51 and the central axis of the receiving roller 2 is equal to the distance between the outermost circle cable 4 and the central axis of the receiving roller 2.

[0045] When there is only one circle of cable 4 left on the take-up roller 2, it is difficult for the take-up roller 2 itself to provide stable pulling force for the cable 4. Driven by the second linear drive 6, the take-up roller 2 cooperates with the limiting roller 7 to clamp the cable 4, so that the cable 4 can be continuously tightened, which is conducive to the stable unwinding of the cable 4.

[0046] Reference Figure 1 and Figure 7 The side wall of the fixed plate 31 is fixedly connected with a connecting plate 8, the lower end of the connecting plate 8 is slidably connected with a clamping plate 81, and the clamping plate 81 is rotatably connected with a clamping wheel 82. The connecting plate 8 is vertically provided with a waist-shaped groove 83, the clamping plate 81 is connected to the connecting plate 8 through the waist-shaped groove 83, and a damping block 84 is fixedly connected between the clamping plate 81 and the clamping wheel 82.

[0047] When the cable 4 wound on the receiving roller 2 is being unwound, the cable 4 does not contact the clamping wheel 82. When the cable 4 is completely separated from the receiving roller 2, the cable 4 on the right side of the support wheel 32 lacks the pulling force of the receiving roller 2, thereby controlling the oil cylinder 3 to drive the support wheel 32 and the clamping wheel 82 to move downward through the fixing plate 31, the connecting plate 8 and the clamping plate 81 until the clamping plate 81 contacts the upper surface of the bracket 1. Driven by the control oil cylinder 3, the connecting plate 8 continues to move downward along the waist-shaped groove 83, and the support wheel 32 and the connecting plate 8 move synchronously close to the clamping wheel 82 until the support wheel 32 and the clamping wheel 82 can clamp the cable 4. The damping block 84 damps the rotation of the clamping wheel 82, so that the clamping wheel 82 cooperates with the support wheel 32 to tighten the cable 4, so that the cable 4 can still be stably unwound after being separated from the receiving roller 2.

[0048] The implementation principle of a cable pay-off device according to an embodiment of the present invention is as follows: an operator pulls the cable 4 upwards and pulls the cable 4 out of the receiving roller 2 for pay-off. The cable 4 is pulled out at a uniform speed, and when the cables 4 on the left and right sides of the support wheel 32 are perpendicular to each other, the support wheel 32 remains stationary relative to the bracket 1 in the vertical direction. When the cable 4 wound on the upper end of the receiving roller 2 is paid out, the angle between the cables 4 on the left and right sides of the support wheel 32 is an acute angle, so that the support wheel 32 moves upward until the cables 4 on the left and right sides of the support wheel 32 are perpendicular to each other. When the cable 4 wound on the lower end of the receiving roller 2 is paid out, the angle between the cables 4 on the left and right sides of the support wheel 32 is an obtuse angle, and the support wheel 32 moves downward until the cables 4 on the left and right sides of the support wheel 32 are perpendicular to each other.

[0049] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A cable pay-off device, comprising a bracket and a receiving roller, characterized in that: The bracket is fixedly connected to a control cylinder, a driving shaft of the control cylinder is fixedly connected to a fixed plate, a support wheel is rotatably provided on the fixed plate, the cable abuts against the side wall of the support wheel, and the external tension pulls the cable out at a uniform speed in the vertical direction. When the cables wound on different parts of the storage roller are released, the support wheel can adapt to the tension of the cable and the thrust of the control cylinder to move in the vertical direction, so that the cable can be perpendicular to the central axis of the storage roller; a friction plate is fixedly connected to the lower bottom surface of the storage roller, a first linear drive is fixedly connected to the bottom of the bracket, and a friction block that can abut against the friction plate is fixedly connected to the driving shaft of the first linear drive; The lower end of the bracket is horizontally fixedly connected with a second linear actuator, the driving shaft of the second linear actuator is fixedly connected with a sliding frame, the sliding frame is slidably connected to the bracket, and the storage roller is rotatably connected to the sliding frame; The bracket is rotatably connected with a limiting roller, the limiting roller is arranged at an end of the receiving roller away from the second linear drive, and the outer side surface of the limiting roller can abut against the cable.

2. A cable pay-off device according to claim 1, characterized in that: The upper end of the bracket is rotatably connected with a guide wheel, and the guide wheel abuts against the cable.

3. A cable pay-off device according to claim 1, characterized in that: The side wall of the fixed plate is fixedly connected with a connecting plate, the lower end of the connecting plate is slidably connected with a clamping plate, and the clamping plate is rotatably connected with a clamping wheel.

4. A cable pay-off device according to claim 3, characterized in that: The connecting plate is vertically provided with a waist-shaped groove, and the clamping plate is connected to the connecting plate through the waist-shaped groove.

5. A cable pay-off device according to claim 4, characterized in that: A damping block is fixedly connected between the clamping plate and the clamping wheel.

6. A cable pay-off device according to claim 1, characterized in that: A weight-reducing cavity is provided inside the storage roller, and a reinforcing rod is fixedly connected to the inner side surface of the weight-reducing cavity.

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