A tape feeding mechanism of a tape wrapping machine
Patent Information
- Application Number
- CN202522448483.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-11-19
AI Technical Summary
现有的包带机中的主动放带方式通常采用电机驱使包带卷转动，然而若电机转速始终保持一致，当包带卷直径逐渐降低后，放带的速度会降低，使包带承受的拉力逐渐变大，仍然有断裂风险
[0015]本实用新型使用时，包带卷套设并固定在转轴上，包带绕设在导向轮上，通过驱动电机和皮带轮机构驱使转轴转动实现主动放带，随着使用过程中包带卷的直径逐渐减小，放带速度降低，当芯线的输送速度保持恒定时，芯线会对包带产生较大的拉力使得包带张紧驱使导向轮向下移动按压触发开关，调节机构工作实现减小从动轮与皮带接触位置的直径，从而提高转轴的转速，用于补偿包带卷直径降低导致的放带速度降低，使放带速度维持在一定的范围内，降低放带速度过慢导致的包带承受拉力过大断裂的风险。本主动放带机构可以在芯线速度维持恒定的同时调节包带卷的转速将放带速度维持在不使包带断裂的安全范围内，同时避免使用精密的传感器和控制电路，能够降低制造成本和维护难度。
Smart Images
Figure CN224783369U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tape wrapping machines, specifically to an active tape feeding mechanism for tape wrapping machines. Background Technology
[0002] In the cable production process, the wrapping machine is an indispensable and important piece of equipment. It is mainly used to tightly wrap various wrapping tapes (such as mica tape, cotton paper tape, aluminum foil, polyester film, etc.) around the core wire through a rotating turntable to achieve the insulation or protection function of the cable.
[0003] Wrapping machines require a tape unloading mechanism during operation to continuously feed the wound tape roll into the machine for wrapping. Passive unloading involves pulling the core wire while simultaneously securing the tape to it, causing the tape roll to rotate passively. This method carries a risk of breakage when the tape is subjected to significant tension. Therefore, using a drive device to actively rotate the tape roll for unloading is one solution. Existing wrapping machines typically use a motor to drive the tape roll. However, if the motor speed remains constant, the unloading speed decreases as the tape roll diameter decreases, leading to a gradual increase in tension on the tape and still posing a breakage risk. Another approach uses precise sensors to monitor the tape roll diameter in real time and adjusts the motor speed via a control circuit, ensuring a synchronized decrease in motor speed as the tape roll diameter decreases. While this method offers higher precision, it is more expensive to manufacture and more difficult to maintain. Utility Model Content
[0004] The purpose of this utility model is to provide an active tape feeding mechanism for a tape feeding machine. This active tape feeding mechanism reduces the diameter of the contact point between the driven wheel and the belt by adjusting the mechanism, thereby increasing the rotational speed of the tape roll. This compensates for the reduced tape feeding speed caused by the reduced tape roll diameter, reduces the risk of tape breakage, and has a simple structure, which can reduce manufacturing costs and maintenance difficulty.
[0005] The technical solution adopted by this utility model to solve the above problems is:
[0006] An active tape feeding mechanism for a tape-making machine includes a frame, a rotating shaft, and a drive motor. The rotating shaft is rotatably mounted on the frame. The drive motor drives the rotating shaft to rotate via a pulley mechanism, which includes a driving pulley, a driven pulley, and a belt. The driving pulley and the driven pulley are coaxially fixed to the output shaft of the drive motor and the rotating shaft, respectively. An adjustment mechanism is provided at the driven pulley to adjust the diameter of the contact position between the driven pulley and the belt. A guide wheel that slides up and down is provided on the frame, and a trigger switch for controlling the start and stop of the adjustment mechanism is provided at the guide wheel.
[0007] In the above technical solution, preferably, the driven wheel is conical, the adjustment mechanism includes a lead screw motor and a slide rod, the trigger switch is connected in series with the lead screw motor, the slide rod is driven to slide back and forth by the lead screw motor and is fixedly mounted in the frame, and the driven wheel is sleeved on and rotatably mounted on the slide rod.
[0008] In the above technical solution, preferably, the inner side of the belt and the driving pulley are both provided with a conical surface with the same cone angle as the conical surface of the driven pulley.
[0009] In the above technical solution, preferably, two tensioning wheels are rotatably arranged on the frame between the driven wheel and the driving wheel. The two tensioning wheels are symmetrically arranged on the left and right sides of the belt, and a spring is provided on the outer side of the tensioning wheel to drive the tensioning wheel to abut against the belt.
[0010] In the above technical solution, preferably, a limit rod is provided on the lower side of the driven wheel, the left and right ends of the limit rod are rotatably mounted on the frame and the limit rod is located between the belt and the frame, and two limit rods are provided and respectively contact the left and right ends of the belt.
[0011] In the above technical solution, preferably, a fixing mechanism for fixing the packing tape roll is provided on the front half of the rotating shaft. The fixing mechanism includes a rotating ring and a fixing ring. The rotating ring is rotatably disposed at the front end of the rotating shaft through a threaded structure, and the fixing ring is fixed at the middle position of the rotating shaft. A clamping ring is slidably disposed between the rotating ring and the fixing ring, and an elastic ring is disposed between the clamping ring and the fixing ring.
[0012] In the above technical solution, preferably, the rear half of the rotating shaft is provided with a radially outward protruding elastic sheet, which is arc-shaped.
[0013] In the above technical solution, preferably, an annular baffle is provided between the front half and the rear half of the rotating shaft, and the baffle is composed of two semi-annular parts fixed by mortise and tenon joints.
[0014] Compared with the prior art, this utility model has the following advantages and effects:
[0015] In use, the tape roll is sleeved and fixed on the rotating shaft, and the tape is wound around the guide wheel. The rotating shaft is driven by a drive motor and pulley mechanism to achieve active tape unloading. As the diameter of the tape roll gradually decreases during use, the unloading speed decreases. When the core wire conveying speed remains constant, the core wire exerts a large tension on the tape, causing the tape to tighten and move the guide wheel downwards, pressing a trigger switch. This activates the adjustment mechanism to reduce the diameter of the contact point between the driven wheel and the belt, thereby increasing the rotational speed of the rotating shaft. This compensates for the reduced unloading speed caused by the decrease in tape roll diameter, maintaining the unloading speed within a certain range and reducing the risk of tape breakage due to excessive tension caused by excessively slow unloading speed. This active unloading mechanism can maintain the unloading speed within a safe range to prevent tape breakage while maintaining a constant core wire speed, and avoids the use of precision sensors and control circuits, thus reducing manufacturing costs and maintenance difficulty. Attached Figure Description
[0016] Figure 1 This is a front structural schematic diagram of the active tape feeding mechanism of the tape feeding machine according to an embodiment of this utility model.
[0017] Figure 2 yes Figure 1 The right view.
[0018] Figure 3 yes Figure 2 A partial structural cross-sectional view.
[0019] Figure 4 yes Figure 1 A partial structural diagram of the back side.
[0020] Figure 5 yes Figure 2 A schematic diagram of the structure of the middle baffle.
[0021] The components include: frame 1, rotating shaft 2, fixing mechanism 21, rotating ring 22, fixing ring 23, clamping ring 24, elastic ring 25, elastic sheet 26, baffle 27, semi-annular part 28, drive motor 3, pulley mechanism 4, driving wheel 41, driven wheel 42, belt 43, conical surface 44, adjusting mechanism 5, lead screw motor 51, slide bar 52, guide wheel 6, trigger switch 61, tension spring 62, tension wheel 7, spring 71, and limit rod 8. Detailed Implementation
[0022] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.
[0023] See Figures 1-5This embodiment discloses an active tape feeding mechanism for a tape-making machine, comprising a frame 1, a rotating shaft 2, and a drive motor 3. The rotating shaft 2 is rotatably mounted on the frame 1. The drive motor 3 drives the rotating shaft 2 to rotate via a pulley mechanism 4. The pulley mechanism 4 includes a driving wheel 41, a driven wheel 42, and a belt 43. The driving wheel 41 and the driven wheel 42 are coaxially fixed to the output shaft of the drive motor 3 and the rotating shaft 2, respectively. An adjustment mechanism 5 is provided at the driven wheel 42 to adjust the diameter of the contact position between the driven wheel 42 and the belt 43. A guide wheel 6 is provided on the frame 1 to slide up and down. A trigger switch 61 for controlling the start and stop of the adjustment mechanism 5 is provided at the guide wheel 6.
[0024] In use, the tape roll is sleeved and fixed on the rotating shaft 2, and the tape is wound around the guide wheel 6. The rotating shaft 2 is driven to rotate by the drive motor 3 and the pulley mechanism 4 to achieve active tape release. As the diameter of the tape roll gradually decreases during use, the tape release speed decreases. When the core wire conveying speed remains constant, the core wire will generate a large tension on the tape, causing the tape to be tensioned and driving the guide wheel 6 to move downward (a tension spring 62 is provided on the upper side of the guide wheel 6 to drive the guide wheel 6 to reset). The guide wheel 6 presses the trigger switch 61 below it, and the adjustment mechanism 5 works to reduce the diameter of the contact position between the driven wheel 42 and the belt 43. Thus, when the speed of the drive motor 3 remains constant, the speed of the rotating shaft 2 can be increased to compensate for the decrease in tape release speed caused by the reduction in the diameter of the tape roll, so that the tape release speed is maintained within a certain range, reducing the risk of the tape breaking due to excessive tension caused by the slow tape release speed. This active tape feeding mechanism can maintain the tape roll speed within a safe range that prevents the tape from breaking while keeping the core wire speed constant. It also avoids the use of precision sensors and control circuits, thus reducing manufacturing costs and maintenance difficulty.
[0025] See Figure 2 , Figure 3 The driven wheel 42 is conical. The adjustment mechanism 5 includes a lead screw motor 51 and a slide bar 52. The trigger switch 61 is connected in series with the lead screw motor 51. The slide bar 52 is driven to slide back and forth by the lead screw motor 51 and is fixedly mounted in the frame 1. The driven wheel 42 is sleeved on and rotatably mounted on the slide bar 52.
[0026] In this invention, the trigger switch 61 is a micro switch. The two normally open contacts of the micro switch are connected in series with the lead screw motor 51 and the power supply. When the guide wheel 6 presses the trigger switch 61, the power supply is connected to the lead screw motor 51, thereby driving the slide bar 52 to move backward within the frame 1. The driven wheel 42 follows the slide bar 52 to move backward, reducing the diameter of the contact point between the driven wheel 42 and the belt 43, thus increasing the rotational speed of the driven wheel 42, and ultimately increasing the rotational speed of the shaft 2 and the tape roll. The adjustment mechanism 5 and the driven wheel 42 have a simple structure, making them easy to manufacture and maintain.
[0027] See Figure 2 The front half of the rotating shaft 2 is provided with a fixing mechanism 21 for fixing the packing tape roll. The fixing mechanism 21 includes a rotating ring 22 and a fixing ring 23. The rotating ring 22 is rotatably disposed at the front end of the rotating shaft 2 through a threaded structure. The fixing ring 23 is fixed at the middle position of the rotating shaft 2. A clamping ring 24 is slidably disposed between the rotating ring 22 and the fixing ring 23. An elastic ring 25 is disposed between the clamping ring 24 and the fixing ring 23.
[0028] Unscrew the rotating ring 22 and place the tape roll on the front half of the rotating shaft 2. Reinstall the rotating ring 22 and screw it on. Push the clamping ring 24 backward and bring the fixing ring 23 closer. Under the squeezing action of the clamping ring 24 and the fixing ring 23, the elastic ring 25 elastically protrudes outward and presses against the inner wall of the tape roll to fix the tape roll. This has the advantage of simple operation and improves the convenience of installing the tape roll.
[0029] See Figure 2 The rear half of the rotating shaft 2 is provided with a radially outward protruding elastic sheet 26, which is arc-shaped.
[0030] When installing the tape rolls, two tape rolls can be successively placed on the rear half and front half of the rotating shaft 2. The tape roll located in the rear half of the rotating shaft 2 is fixed by the elastic sheet 26 against its inner wall. When the tape roll in the front half of the rotating shaft 2 is used up, the spare tape roll in the rear half can be easily moved forward for replacement, shortening the downtime caused by replacing the tape roll.
[0031] See Figure 2 , Figure 5 An annular baffle 27 is provided between the front and rear halves of the rotating shaft 2. The baffle 27 is composed of two semi-annular parts 28 that are fixed by mortise and tenon joints.
[0032] The baffle 27 reduces the probability of the spare tape roll on the rear half of the rotating shaft 2 hitting the tape roll during tape feeding, ensuring normal tape feeding. The two semi-circular parts 28 are fixed by tenon and mortise joints, which facilitates the disassembly and installation of the baffle 27.
[0033] See Figure 3 The inner side of the belt 43 and the driving pulley 41 are both provided with a cone surface 44 with the same cone angle as the cone surface 44 of the driven pulley 42.
[0034] By setting the conical surface 44, the contact area between the belt 43 and the driving pulley 41 and the driven pulley 42 is increased, reducing the risk of slippage between the belt 43 and the driven pulley 42 and the driving pulley 41.
[0035] See Figure 4Two tensioning wheels 7 are rotatably mounted on the frame 1 between the driven wheel 42 and the driving wheel 41. The two tensioning wheels 7 are symmetrically arranged on the left and right sides of the belt 43. A spring 71 is provided on the outer side of the tensioning wheel 7 to drive the tensioning wheel 7 to abut against the belt 43.
[0036] When the driven wheel 42 moves backward under the drive of the lead screw motor 51, the diameter of the contact point between the driven wheel 42 and the belt 43 decreases, which will cause the belt 43 to loosen. Therefore, the tension wheel 7 is driven to move inward by the spring 71 to keep the belt 43 in a taut state, ensuring the normal operation of the belt 43.
[0037] See Figure 4 A limit rod 8 is provided on the lower side of the driven wheel 42. The left and right ends of the limit rod 8 are rotatably mounted on the frame 1 and the limit rod 8 is located between the belt 43 and the frame 1. There are two limit rods 8, which are respectively in contact with the left and right ends of the belt 43.
[0038] The belt 43 is limited by the limiting rod 8, reducing the probability that the upper end of the belt 43 will slide directly forward to the narrowest end of the driven pulley 42, causing the adjusting mechanism 5 to fail. When the belt 43 rotates, the two limiting rods 8 can rotate in opposite directions, reducing the frictional resistance of the limiting rods 8 on the belt 43.
[0039] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.
Claims
1. An active tape feeding mechanism for a tape-making machine, characterized in that: The device includes a frame, a rotating shaft, and a drive motor. The rotating shaft is rotatably mounted on the frame. The drive motor drives the rotating shaft to rotate via a pulley mechanism, which includes a driving pulley, a driven pulley, and a belt. The driving pulley and the driven pulley are coaxially fixed to the output shaft of the drive motor and the rotating shaft, respectively. An adjustment mechanism is provided at the driven pulley to adjust the diameter of the contact position between the driven pulley and the belt. A guide wheel that slides up and down is provided on the frame, and a trigger switch for controlling the start and stop of the adjustment mechanism is provided at the guide wheel.
2. The active tape feeding mechanism of the tape feeding machine according to claim 1, characterized in that: The driven wheel is conical, and the adjustment mechanism includes a lead screw motor and a slide bar. The trigger switch is connected in series with the lead screw motor. The slide bar is driven by the lead screw motor to slide back and forth and is fixedly mounted in the frame. The driven wheel is sleeved on and rotatably mounted on the slide bar.
3. The active tape feeding mechanism of the tape feeding machine according to claim 1, characterized in that: The inner side of the belt and the driving pulley are both provided with a conical surface with the same cone angle as the conical surface of the driven pulley.
4. The active tape feeding mechanism of the tape feeding machine according to claim 1, characterized in that: Two tensioning wheels are rotatably mounted on the frame between the driven wheel and the driving wheel. The two tensioning wheels are symmetrically arranged on the left and right sides of the belt, and springs are provided on the outer side of the tensioning wheels to drive the tensioning wheels to press against the belt.
5. The active tape feeding mechanism of the tape-making machine according to claim 1, characterized in that: A limit rod is provided on the lower side of the driven wheel. The left and right ends of the limit rod are rotatably mounted on the frame and the limit rod is located between the belt and the frame. There are two limit rods, which respectively contact the left and right ends of the belt.
6. The active tape feeding mechanism of the tape-making machine according to claim 1, characterized in that: The front half of the rotating shaft is provided with a fixing mechanism for fixing the packing tape roll. The fixing mechanism includes a rotating ring and a fixed ring. The rotating ring is rotatably set at the front end of the rotating shaft through a threaded structure, and the fixed ring is fixed at the middle position of the rotating shaft. A clamping ring is slidably arranged between the rotating ring and the fixed ring, and an elastic ring is arranged between the clamping ring and the fixed ring.
7. The active tape feeding mechanism of the tape feeding machine according to claim 1, characterized in that: The rear half of the shaft is provided with a radially outward protruding elastic sheet, which is arc-shaped.
8. The active tape feeding mechanism of the tape feeding machine according to claim 1, characterized in that: An annular baffle is provided between the front and rear halves of the shaft. The baffle consists of two semi-annular parts that are fixed together by mortise and tenon joints.