Wire drawing and pay-off device with pay-off power

Abstract

The present application relates to wire drawing machine wire laying device technical field, provide a kind of self wire laying power wire drawing wire laying device, comprising: wire laying box;Wire laying shaft, rotationally supported in the wire laying box, its front end passes through the wire laying box and is used to install wire roller;Speed adjusting mechanism, set in the wire laying box, for changing the rotation speed of wire laying shaft.The present application overcomes the deficiencies of prior art, reasonable in design, compact structure, the present application can be through movable guide pulley real-time sensing tension change caused by wire drawing speed fluctuation or wire roller roll diameter change, and the displacement is transmitted to shift lever by gear, screw etc. linkage mechanism, automatically, continuously to speed adjusting mechanism is switched between different transmission ratio gears.The whole speed regulation process does not require any sensor, controller or external intervention, realizes automatic control, manufacturing cost and maintenance difficulty significantly reduced, strong adaptability to harsh working environment, stable and reliable operation.

Description

Technical Field

[0001] This invention relates to the field of wire drawing machine pay-off equipment technology, specifically to a wire drawing and pay-off device with its own pay-off power. Background Technology

[0002] In the metal wire drawing process, the wire feeding device is a key piece of equipment at the front end of the production line, and its performance directly affects the quality of the drawn products and production efficiency. Traditional wire feeding methods are mainly divided into two categories: passive wire feeding and active wire feeding.

[0003] Passive wire feeding devices are typically simple in structure, with their wire rollers lacking independent drives. They rely entirely on the traction force of the subsequent wire drawing machine to overcome the inertia and frictional resistance of the rollers to achieve wire feeding. This method has significant drawbacks: firstly, during startup, shutdown, or fluctuations in drawing speed, the sudden changes in traction force cause extremely unstable wire tension, easily leading to problems such as wire breakage and uneven wire diameter; secondly, to overcome the static friction and inertia of the rollers, the wire drawing machine needs to perform additional work, increasing the load on the main traction motor. This drawback is particularly pronounced in the production of large-coil, thick-diameter wires.

[0004] To address these issues, existing technologies have developed active wire feeding devices, which equip the wire feeding shaft with an independent motor to actively feed the wire. However, the core challenge of such devices lies in the fact that as the wire feeding process continues, the amount of wire wound on the rollers gradually decreases, and its diameter gradually decreases from the maximum value when fully wound to the minimum value when nearly empty. Conversely, at the take-up end, the situation is exactly the opposite; as the amount of wire wound on the take-up rollers gradually increases, its diameter continuously increases, and with a constant take-up roller speed, the take-up speed will correspondingly increase. If the rotational speed of the wire feeding shaft cannot be coordinated with the real-time changes in the take-up speed, this combined effect of decreasing wire diameter during wire feeding and increasing wire diameter during take-up can easily lead to a continuous increase in the tension on the wire, resulting in excessive tightness or even breakage. Therefore, we propose a wire feeding device with its own built-in wire feeding power. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a wire drawing and feeding device with its own wire feeding power, which overcomes the deficiencies of existing technologies, has a reasonable design and compact structure, and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wire drawing and unwinding device with its own unwinding power, comprising:

[0007] Cable delivery box;

[0008] A pay-off shaft is rotatably supported on the pay-off box, with its front end extending out of the pay-off box and used to install a wire roller.

[0009] A speed adjustment mechanism is provided inside the wire feeding box to change the rotation speed of the wire feeding shaft;

[0010] The speed adjustment mechanism includes:

[0011] The driven gear set includes multiple driven gears that are sequentially fixed on the wire-laying shaft along the axial direction, and the diameter of each driven gear decreases in the same direction;

[0012] The drive shaft is rotatably mounted inside the wire feeding box;

[0013] The shift gear set includes multiple shift gears rotatably mounted on the drive shaft. The diameter of each shift gear increases in the opposite direction to the decreasing direction of the driven gear, and the multiple shift gears mesh with the multiple driven gears in a one-to-one correspondence.

[0014] A shift lever is slidably fitted axially within the inner cavity of the drive shaft. The shift lever is equipped with a radially retractable locking block. An elastic element supports the locking block and the shift lever to apply a radially outward elastic force to the locking block. An axially extending guide groove is formed on the peripheral wall of the drive shaft, and the radially outer end of the locking block protrudes from the guide groove. Each shift gear has a locking groove on its inner peripheral surface for the locking block to engage with.

[0015] By pushing the shift lever axially, the locking block can selectively engage with the locking grooves of different shift gears, thereby fixing the corresponding shift gears circumferentially with the drive shaft and driving the wire feeding shaft to rotate with different transmission ratios.

[0016] Preferably, it further includes a tension mechanism, the tension mechanism comprising:

[0017] Tension box, fixed on the wire feeding box;

[0018] At least two fixed guide rollers are spaced apart on the tension box;

[0019] The movable guide wheel has its axle slidably mounted in an adjustment slot on the tension box, so that the movable guide wheel can move along the adjustment slot, thereby changing the length of the wire path passing through the fixed guide wheel and the movable guide wheel;

[0020] A wire guide is used to guide the wire released from the wire roller on the wire feeding shaft to the fixed guide wheel.

[0021] Preferably, the tension box is provided with a resistance unit, the resistance unit comprising:

[0022] A rotating shaft is rotatably mounted inside the tension box;

[0023] A sleeve is fitted onto the outer wall of the rotating shaft;

[0024] A torsion spring is sleeved on the outer wall of the sleeve;

[0025] The sleeve is provided with a swing arm, one end of which is away from the sleeve is connected to the axle of the movable guide wheel, and the other end is provided with a torque hole;

[0026] The rotating shaft is provided with a wheel, and the outer circumferential surface of the wheel is provided with a torque groove;

[0027] Both ends of the torsion spring are provided with hooks, and the two hooks are respectively hooked into the corresponding torsion holes and torsion grooves.

[0028] The outer wall of the rotating shaft is provided with a resistance disk, and the outer circumferential surface of the resistance disk is provided with a resistance groove.

[0029] The resistance rod is rotatably mounted inside the tension box;

[0030] A resistance spring, with its two ends connected to the tension box and the resistance rod, respectively;

[0031] A resistance wheel is rotatably mounted at the end of the resistance rod, and the outer circumferential surface of the resistance wheel is in contact with the inner wall of the resistance groove.

[0032] Preferably, the wire feeding box is equipped with a linkage unit, the linkage unit comprising:

[0033] The first gear is fixedly installed on the outer wall of the rotating shaft;

[0034] The second gear is rotatably mounted inside the tension box, and the second gear meshes with the first gear.

[0035] The third gear is coaxially and fixedly connected to the second gear;

[0036] The fourth gear is rotatably mounted inside the wire feeding box and meshes with the third gear;

[0037] The lead screw is rotatably installed inside the wire feeding box and is fixedly connected to the third gear;

[0038] The sliding sleeve is threaded onto the outer wall of the lead screw;

[0039] A shift wheel is fixedly connected to the end of the shift lever. The sliding sleeve has a retaining groove on the side away from the lead screw. The retaining groove is fitted onto the shaft of the shift wheel to drive the shift wheel to move along its axial direction.

[0040] Preferably, the diameter of the third gear is larger than the diameter of the fourth gear.

[0041] Preferably, a guide rod is fixedly connected inside the wire feeding box, the guide rod is arranged parallel to the lead screw, and the sliding sleeve is sleeved on the outer wall of the guide rod.

[0042] Preferably, the wire guide includes a frame and four wire guide rollers rotatably disposed within the frame, the four wire guide rollers being arranged in a grid pattern.

[0043] Preferably, the adjusting groove is an arc-shaped groove, and its central axis coincides with the axis of the rotating shaft.

[0044] Preferably, the shift lever is provided with a limiting block inside, the limiting block is provided corresponding to the shift lever, and there is a gap between the two.

[0045] This invention provides a wire drawing and unwinding device with its own unwinding power. It has the following beneficial effects:

[0046] 1. This invention comprises an adaptive speed control system consisting of a tension mechanism, a linkage unit, and a speed adjustment mechanism. This device can sense tension changes in real time caused by fluctuations in wire drawing speed or changes in the diameter of the wire rollers via a movable guide wheel. This displacement is then automatically and continuously transmitted to the shift lever through a linkage mechanism such as gears and lead screws, driving the speed adjustment mechanism to switch between different transmission ratios. The entire speed control process requires no sensors, controllers, or external intervention, achieving automatic control. This significantly reduces manufacturing costs and maintenance difficulty, provides strong adaptability to harsh working environments, and ensures stable and reliable operation.

[0047] 2. This invention utilizes automatic speed regulation to allow the wire feeding speed to proactively adapt to the reduction in the diameter of the wire roller and fluctuations in the drawing speed. When tension increases, the device automatically switches to a high-speed gear to accelerate the wire feeding speed, ensuring that the wire tension is consistently maintained within a relatively stable preset range. The damping buffer system in the tension mechanism, consisting of a torsion spring, a resistance wheel, and a resistance disc, effectively absorbs tension peaks and suppresses violent oscillations of the moving guide wheel, making the tension adjustment process smoother and gentler. This fundamentally avoids quality defects such as wire breakage and diameter fluctuations caused by uncontrolled tension, significantly improving the quality and yield of drawn wire products.

[0048] 3. The speed adjustment mechanism of this invention adopts a shift lever structure with a hollow drive shaft and a built-in elastic locking block. By creating a guide groove on the drive shaft and setting a locking groove on the inner circumference of the shift gear, the radial engagement and disengagement of the locking block are achieved using elastic force. The guide slope design at its end allows for smooth switching between compression, contraction, and sliding during the shifting process. This structure ensures reliable torque transmission while achieving compact and precise axial sliding shifting. Attached Figure Description

[0049] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0050] Figure 2 This is a schematic diagram of the back part of the wire feeding box structure of the present invention;

[0051] Figure 3 For the present invention Figure 2 Top view of the structure;

[0052] Figure 4 This is a three-dimensional schematic diagram of the speed adjustment mechanism and linkage unit structure of the present invention;

[0053] Figure 5 This is a three-dimensional schematic diagram of the sliding sleeve structure of the present invention;

[0054] Figure 6 This is a three-dimensional schematic diagram of the shift gear set structure of the present invention;

[0055] Figure 7 This is a three-dimensional schematic diagram of a single shift gear structure within the shift gear set of the present invention;

[0056] Figure 8 This is a three-dimensional schematic diagram of the drive shaft structure of the present invention;

[0057] Figure 9 This is a three-dimensional schematic diagram of the shift lever structure of the present invention;

[0058] Figure 10 This is a three-dimensional front view of the tension box structure of the present invention;

[0059] Figure 11 This is a three-dimensional schematic diagram of the back of the tension box structure of the present invention;

[0060] Figure 12 This is a three-dimensional schematic diagram of the tension mechanism structure of the present invention;

[0061] Figure 13 This is a three-dimensional schematic diagram of the wheel structure of the present invention;

[0062] Figure 14 This is a three-dimensional schematic diagram of the sleeve structure of the present invention;

[0063] Figure 15 This is a three-dimensional schematic diagram of the torsion spring structure of the present invention.

[0064] In the diagram: 1. Pay-off box; 2. Pay-off shaft; 31. Driven gear set; 32. Drive shaft; 321. Guide groove; 33. Shift gear set; 331. Locking groove; 34. Shift lever; 341. Locking block; 342. Elastic element; 343. Limiting block; 4. Tension box; 41. Fixed guide wheel; 42. Movable guide wheel; 43. Adjusting groove; 441. Frame; 442. Guide roller; 451. Rotating shaft; 4511. Wheel; 451 2. Torque groove; 4513. Resistance disc; 4514. Resistance groove; 452. Sleeve; 4521. Swing arm; 4522. Torque hole; 453. Torsion spring; 4531. Hook; 454. Resistance rod; 455. Resistance spring; 456. Resistance wheel; 51. First gear; 52. Second gear; 53. Third gear; 54. Fourth gear; 55. Lead screw; 56. Sliding sleeve; 57. Shift wheel; 58. Bayonet; 6. Guide rod. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0066] like Figures 1 to 15 As shown, the present invention provides a wire drawing and feeding device with its own wire feeding power, which mainly includes a wire feeding box 1, a wire feeding shaft 2, a speed adjustment mechanism, a tension mechanism, and a linkage unit.

[0067] The pay-off shaft 2 is rotatably supported on the pay-off box 1 by bearings, with its front end extending out of the pay-off box 1 for mounting the wire roller wound with the wire. The rear section of the pay-off shaft 2 extends into the pay-off box 1 and is equipped with a speed adjustment mechanism. The speed adjustment mechanism is used to change the rotation speed of the pay-off shaft 2 during the pay-off process to adapt to changes in the wire roller diameter and maintain the matching between the pay-off linear speed and the subsequent wire drawing speed.

[0068] The speed adjustment mechanism includes a driven gear set 31, a drive shaft 32, a shift gear set 33, and a shift lever 34. A drive motor is installed inside the pay-off box 1, and the drive motor is connected to the drive shaft 32 to provide power for pay-off, eliminating the need for passive dragging by the wire drawing machine. The driven gear set 31 consists of multiple driven gears of different diameters, which are sequentially fixedly mounted on the pay-off shaft 2 along its axial direction, with the diameter of each driven gear decreasing in the same direction. The drive shaft 32 is rotatably mounted inside the pay-off box 1 via bearings and is connected to the drive motor. The shift gear set 33 consists of multiple shift gears, each shift gear rotatably mounted on the drive shaft 32 via bearings, allowing the shift gears to rotate freely relative to the drive shaft 32. The diameter of each shift gear increases in the opposite direction to the decreasing direction of the driven gears, and the multiple shift gears maintain a constant meshing relationship with the multiple driven gears in a one-to-one correspondence.

[0069] To achieve gear shifting, the drive shaft 32 is machined as a hollow shaft with an axially extending cylindrical inner cavity. The shift lever 34 is fitted into this inner cavity in a manner that allows it to slide axially. The shift lever 34 is provided with a radially retractable locking block 341. An elastic element 342, specifically a compression spring, supports the locking block 341 and the shift lever 34, and always applies a radially outward elastic force to the locking block 341. An axially extending elongated guide groove 321 is formed on the peripheral wall of the drive shaft 32, and the radially outer end of the locking block 341 protrudes from the guide groove 321. Each shift gear has a locking groove 331 on its inner peripheral surface for the locking block 341 to engage with. The locking groove 331 is a groove that matches the shape of the outer end of the locking block 341, and the outer end face of the locking block 341 is machined with a bevel or an arc surface.

[0070] When a gear needs to be selected, the outer end of the locking block 341 slides into the locking groove 331 of the corresponding shift gear under the guidance of the guide groove 321 by pushing the shift lever 34 axially. Under the pushing force of the elastic element 342, the locking block 341 engages in the locking groove 331, fixing the shift gear and the drive shaft 32 circumferentially. The torque of the drive shaft 32 is then transmitted to the corresponding driven gear meshing with it through the shift gear, thereby driving the wire feeding shaft 2 to rotate at the transmission ratio determined by the gear. When the shift lever 34 is pushed axially again, the side wall of the locking groove 331 will squeeze the locking block 341 due to the guide slope on the outer end face of the locking block 341, forcing the locking block 341 to overcome the force of the elastic element 342 and retract radially inward, thus disengaging from the current locking groove 331. As the shift lever 34 continues to move, the locking block 341 will slide into the locking groove 331 of the adjacent shift gear, realizing gear shifting. A limit block 343 is also fixedly installed in the inner cavity of the shift lever 34. The limit block 343 is opposite to the inner end of the locking block 341 and there is a gap between them. This gap limits the maximum displacement of the locking block 341 inward, which can prevent the elastic element 342 from being over-compressed and damaged.

[0071] In order to achieve automatic tension adjustment during the wire feeding process and to automatically complete the above-mentioned shifting action, this device also includes a tension mechanism and a linkage unit.

[0072] The tension mechanism includes a tension box 4, at least two fixed guide wheels 41, a movable guide wheel 42, and a wire guide. The tension box 4 is fixedly mounted on the front of the wire feeding box 1. The two fixed guide wheels 41 are spaced apart and fixedly mounted on the tension box 4, and the movable guide wheel 42 is located between the two fixed guide wheels 41. An adjustment groove 43 is provided on the side plate of the tension box 4. The axle of the movable guide wheel 42 is slidably mounted in the adjustment groove 43, so that the movable guide wheel 42 can move along the trajectory of the adjustment groove 43, thereby changing the length of the wire path passing through each fixed guide wheel 41 and the movable guide wheel 42, and realizing the buffering and adjustment of tension. The adjustment groove 43 is specifically set as an arc-shaped groove, and its central axis coincides with the axis of the rotating shaft 451 described below, ensuring that the movement trajectory of the movable guide wheel 42 is an arc, which facilitates linkage with the swing arm mechanism.

[0073] The wire guide is installed on the side of the tension box 4 near the pay-off shaft 2, and is used to smoothly guide the wire released from the wire roller on the pay-off shaft 2 to the fixed guide wheel 41. The wire guide includes a frame 441 and four wire guide rollers 442 rotatably arranged in the frame 441. The four wire guide rollers 442 are arranged in a grid pattern, and the wire passes through the central area enclosed by the four wire guide rollers 442, which can both guide the wire and prevent the wire from jumping out.

[0074] The tension box 4 is also equipped with a resistance unit to provide appropriate damping and restoring force for the movement of the movable guide wheel 42. The resistance unit includes a rotating shaft 451, a sleeve 452, a torsion spring 453, a resistance rod 454, a resistance spring 455, and a resistance wheel 456. The rotating shaft 451 is rotatably mounted in the tension box 4 via bearings, and the sleeve 452 is loosely fitted on the outer wall of the rotating shaft 451, allowing them to rotate relative to each other. A swing arm 4521 is integrally connected or fixed to the sleeve 452. One end of the swing arm 4521 away from the sleeve 452 is rotatably connected to the axle of the movable guide wheel 42, and a torque hole 4522 is provided on the side wall of its other end. A wheel 4511 is fixed to the rotating shaft 451, and a torque groove 4512 is provided on the outer circumferential surface of the wheel 4511. The torsion spring 453 is sleeved on the outer wall of the sleeve 452. Both ends of the spring are bent to form hooks 4531. The two hooks 4531 are respectively hooked into the corresponding torque hole 4522 and torque groove 4512, thereby elastically connecting the sleeve 452 and the rotating shaft 451.

[0075] A resistance disk 4513 is fixed to the outer wall of the rotating shaft 451, and a resistance groove 4514 is formed on the outer circumferential surface of the resistance disk 4513. The end of the resistance rod 454 is hinged to the inner wall of the tension box 4, and the two ends of the resistance spring 455 are respectively connected to the tension box 4 and the resistance rod 454, applying tension to the resistance rod 454. The resistance wheel 456 is rotatably mounted at the end of the resistance rod 454, and under the action of the resistance spring 455, its outer circumferential surface is always pressed tightly against the inner wall of the resistance groove 4514, generating stable frictional resistance.

[0076] When the tension of the conductor changes, the movable guide wheel 42 moves along the adjusting groove 43, causing the swing arm 4521 to rotate the sleeve 452 by an angle. Due to the connecting action of the torsion spring 453, this rotation is elastically transmitted to the rotating shaft 451 through the torsion spring 453, causing it to rotate by a certain angle. During this process, the resistance disk 4513 rotates with the rotating shaft 451, and the friction between the resistance wheel 456 and the resistance groove 4514 provides a damping effect, making the movement of the movable guide wheel 42 smooth without violent oscillation. At the same time, the elastic deformation of the torsion spring 453 provides a tendency for the movable guide wheel 42 to return to the equilibrium position.

[0077] To achieve automatic gear shifting controlled by tension changes, a linkage unit is also installed in the pay-off box 1 and the tension box 4. The linkage unit includes a first gear 51, a second gear 52, a third gear 53, a fourth gear 54, a lead screw 55, a sliding sleeve 56, and a shift wheel 57. The first gear 51 is fixedly mounted on the outer wall of the rotating shaft 451 and rotates synchronously with it. The second gear 52 is rotatably mounted inside the tension box 4 and meshes with the first gear 51. The third gear 53 is coaxially fixedly connected to the second gear 52, and the two rotate synchronously. The fourth gear 54 is rotatably mounted inside the pay-off box 1 and meshes with the third gear 53; the diameter of the third gear 53 is larger than the diameter of the fourth gear 54, which serves to reduce speed and increase torque, ensuring that even a small displacement of the movable guide wheel 42 is amplified and can still reliably drive the shift lever 34 to move.

[0078] The lead screw 55 is rotatably mounted inside the pay-off box 1 via bearings, and one end of it is fixedly connected to the axle of the third gear 53, allowing it to rotate synchronously with the third gear 53. A sliding sleeve 56 is threadedly connected to the outer wall of the lead screw 55 via internal threads. A guide rod 6 is also fixedly connected inside the pay-off box 1. The guide rod 6 is parallel to the lead screw 55, and the sliding sleeve 56 has a through hole and slides onto the outer wall of the guide rod 6, thus preventing the sliding sleeve 56 from rotating with the lead screw 55 and allowing it to move only along the axis of the lead screw 55. A fork-shaped structure extends from the side of the sliding sleeve 56 away from the lead screw 55, forming a bayonet 58. The shift wheel 57 is connected to the end of the shift lever 34. The open end of the latch 58 is fitted onto the shaft of the shift wheel 57, so that the sliding sleeve 56 can drive the shift wheel 57 and the shift lever 34 connected to it to move along the axis of the shift lever 34 through the latch 58, while allowing the shift lever 34 and the shift wheel 57 to rotate freely with the drive shaft 32.

[0079] The working process of this device is as follows: Before the wire feeding begins, the wire roller is fully wound with a large diameter. At this time, the movable guide wheel 42 is in the preset initial position, and the locking block 341 on the shift lever 34 engages in the locking groove 331 of the low-speed gear (i.e., the shift gear corresponding to the pair of meshing gears with a larger driven gear diameter and a smaller shift gear diameter). The drive motor drives the drive shaft 32 to rotate, and the power is transmitted to the wire feeding shaft 2 through this gear to feed the wire at a lower speed. After the wire is led out by the wire roller, it passes through the center of the grid formed by the four guide rollers 442 of the wire guide member, and then passes around the fixed guide wheel 41 and the movable guide wheel 42 in sequence, and is finally introduced into the subsequent wire drawing equipment.

[0080] During the wire drawing process, if the wire drawing speed increases instantaneously or the diameter of the wire roller gradually decreases, the tension of the wire increases. The movable guide wheel 42 will be moved along the adjusting groove 43 in the direction of increasing the winding path length due to the tension of the wire. At this time, the swing arm 4521 drives the sleeve 452 to rotate, which in turn drives the rotating shaft 451 to rotate via the torsion spring 453. On the one hand, the resistance plate 4513 rotates and is damped by the friction of the resistance wheel 456, making the adjustment process smooth. On the other hand, the rotation of the rotating shaft 451 drives the first gear 51 to rotate, which, through the transmission of the second gear 52, the third gear 53 and the fourth gear 54, causes the lead screw 55 to rotate. The sliding sleeve 56 moves axially along the guide rod 6 and pushes the shift lever 34 to move towards the high-speed gear through the bayonet 58 and the shift wheel 57. During this process, the locking block 341 disengages from the current locking groove 331 and, under the action of the elastic element 342, engages in the next gear (with a smaller transmission ratio and a higher speed of the wire feeding shaft 2) locking groove 331. This increases the speed of the wire feeding shaft 2 and the wire feeding speed, thereby reducing the wire tension and keeping the wire feeding tension within a relatively stable range. No manual intervention is required, and the entire wire feeding process is completed by the device's own power, without the need for additional power equipment.

[0081] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0082] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention 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 do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wire drawing and unwinding device with its own wire unwinding power, characterized in that, include: Cable delivery box (1); The wire feeding shaft (2) is rotatably supported on the wire feeding box (1), and its front end extends out of the wire feeding box (1) and is used to install the wire roller; A speed adjustment mechanism is provided inside the wire feeding box (1) to change the rotation speed of the wire feeding shaft (2); The speed adjustment mechanism includes: Driven gear set (31) includes multiple driven gears that are sequentially fixed along the axial direction on the wire feeding shaft (2), and the diameter of each driven gear decreases in the same direction; The drive shaft (32) is rotatably mounted inside the wire feeding box (1); The shift gear set (33) includes a plurality of shift gears rotatably mounted on the drive shaft (32), the diameter of each shift gear increases in the opposite direction to the decreasing direction of the driven gear, and the plurality of shift gears mesh with the plurality of driven gears in a one-to-one correspondence; A shift lever (34) is axially slidably fitted in the inner cavity of the drive shaft (32). The shift lever (34) is provided with a locking block (341) that can extend and retract radially. An elastic element (342) is supported between the locking block (341) and the shift lever (34) to apply an elastic force pointing radially outward to the locking block (341). A guide groove (321) extending axially is provided on the peripheral wall of the drive shaft (32). The radially outer end of the locking block (341) extends out from the guide groove (321). Each shift gear has a locking groove (331) on its inner peripheral surface for the locking block (341) to engage with. By pushing the shift lever (34) axially, the locking block (341) can selectively engage in the locking groove (331) of different shift gears, so that the corresponding shift gear is circumferentially fixed to the drive shaft (32), thereby driving the wire feeding shaft (2) to rotate with different transmission ratios; It also includes a tension mechanism, which comprises: Tension box (4) is fixed on the wire feeding box (1); At least two fixed guide wheels (41) are spaced apart on the tension box (4); The movable guide wheel (42) has its axle slidably mounted in the adjustment groove (43) opened on the tension box (4) so ​​that the movable guide wheel (42) can move along the adjustment groove (43) to change the length of the wire path passing through the fixed guide wheel (41) and the movable guide wheel (42); A wire guide is used to guide the wire released from the wire roller on the wire feeding shaft (2) to the fixed guide wheel (41). The tension box (4) is equipped with a resistance unit; The wire feeding box (1) is equipped with a linkage unit.

2. The wire drawing and unwinding device with self-contained wire unwinding power as described in claim 1, characterized in that: The resistance unit includes: A rotating shaft (451) is rotatably mounted inside the tension box (4); A sleeve (452) is fitted onto the outer wall of the rotating shaft (451); A torsion spring (453) is sleeved on the outer wall of the sleeve (452); The sleeve (452) is provided with a swing arm (4521). One end of the swing arm (4521) away from the sleeve (452) is connected to the axle of the movable guide wheel (42), and the other end is provided with a torque hole (4522). The rotating shaft (451) is provided with a wheel (4511), and the outer circumferential surface of the wheel (4511) is provided with a torque groove (4512). Both ends of the torsion spring (453) are provided with hooks (4531), and the two hooks (4531) are respectively hooked into the corresponding torsion holes (4522) and torsion grooves (4512); The outer wall of the rotating shaft (451) is provided with a resistance disk (4513), and the outer peripheral surface of the resistance disk (4513) is provided with a resistance groove (4514) in the circumferential direction. The resistance rod (454) is rotatably mounted inside the tension box (4); The resistance spring (455) is connected at both ends to the tension box (4) and the resistance rod (454) respectively; A resistance wheel (456) is rotatably disposed at the end of the resistance rod (454), and the outer circumferential surface of the resistance wheel (456) is in contact with the inner wall of the resistance groove (4514).

3. The wire drawing and unwinding device with self-contained unwinding power as described in claim 2, characterized in that: The linkage unit includes: The first gear (51) is fixedly installed on the outer wall of the rotating shaft (451); The second gear (52) is rotatably mounted inside the tension box (4), and the second gear (52) meshes with the first gear (51); The third gear (53) is coaxially and fixedly connected to the second gear (52); The fourth gear (54) is rotatably installed inside the wire feeding box (1) and meshes with the third gear (53); The lead screw (55) is rotatably installed inside the wire feeding box (1) and is fixedly connected to the third gear (53); The sliding sleeve (56) is threaded onto the outer wall of the lead screw (55); The shift wheel (57) is fixedly connected to the end of the shift lever (34). The sliding sleeve (56) is provided with a slot (58) on the side away from the lead screw (55). The slot (58) is fitted onto the shaft of the shift wheel (57) to drive the shift wheel (57) to move along its axial direction.

4. The wire drawing and unwinding device with self-contained wire unwinding power as described in claim 3, characterized in that: The diameter of the third gear (53) is greater than the diameter of the fourth gear (54).

5. The wire drawing and unwinding device with self-contained unwinding power as described in claim 3, characterized in that: The wire feeding box (1) is fixedly connected to a guide rod (6), which is arranged parallel to the lead screw (55), and the sliding sleeve (56) is sleeved on the outer wall of the guide rod (6).

6. The wire drawing and unwinding device with self-contained unwinding power as described in claim 1, characterized in that: The wire guide includes a frame (441) and four wire guide rollers (442) rotatably disposed within the frame (441), the four wire guide rollers (442) being arranged in a grid pattern.

7. The wire drawing and unwinding device with self-contained unwinding power as described in claim 2, characterized in that: The adjusting groove (43) is an arc-shaped groove, and its central axis coincides with the axis of the rotating shaft (451).

8. The wire drawing and unwinding device with self-contained wire unwinding power as described in claim 1, characterized in that: The shift lever (34) is provided with a limiting block (343) inside. The limiting block (343) is provided corresponding to the shift lever (34), and there is a gap between the two.

Images