Tension adjusting device for shearing machine

Abstract

The utility model relates to the technical field of shearing equipment, and discloses a tension adjusting device for a shearing machine, which comprises a rack, and an unwinding roller, a tension adjusting unit, a cutting unit, a dynamic compensation unit and a tensioning roller are sequentially arranged on the rack along the conveying direction of cleaning cloth, each tension adjusting unit comprises a supporting frame, adjusting sliding blocks vertically arranged in the supporting frame in a sliding mode, transmission rollers rotationally connected with the two adjusting sliding blocks and driving parts driving the adjusting sliding blocks to move in the vertical direction, the transmission rollers and the unwinding rollers are arranged in parallel, and the ends, corresponding to the transmission rollers, of the supporting frames are each provided with one tension adjusting unit. And the guide rails are arranged on the opposite side walls in the rack. The cutting device has the effect of improving the cutting quality of the cleaning cloth.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shearing equipment, in particular to a tension adjusting device for a shearing machine. BACKGROUND

[0002] With the significant improvement of people's living quality, the cleaning cloth for glasses as a convenient and practical disposable glasses wiping product is increasingly favored in daily life. In the production process of the cleaning cloth for glasses, the cleaning cloth in the initial stage is generally in the form of a roll, which needs to be cut into a size that meets the product requirements by a shearing machine so as to carry out subsequent packaging work.

[0003] However, in the actual production process at present, the roll-shaped cleaning cloth exposes many difficult problems when being conveyed and sheared by multiple cutters synchronously. Due to the width and length characteristics of the cleaning cloth itself, it is easy to wrinkle in the transmission process, which seriously affects the production efficiency and product quality.

[0004] The existing tensioning device of part of roll paper slitting machines cannot make adaptive adjustment according to the complex state of the cleaning cloth in the unwinding, transmission and shearing process. When the tension of the cleaning cloth is too large, it is easy to break. Once broken, the cleaning cloth needs to be manually rethreaded, which not only consumes time, but also may affect the subsequent transmission and shearing accuracy of the cleaning cloth due to improper operation, greatly increasing the complexity and degree of trouble of processing. When the tension of the cleaning cloth is too small, the cleaning cloth is unbalanced in transmission, and the local tension fluctuates, thereby producing wrinkles, which leads to frequent left and right deviation of the cleaning cloth, making it present an unstable state of being loose at times and being tight at times, which further aggravates the instability of the tension in the unwinding and shearing process.

[0005] The above-mentioned tension problems seriously affect the shearing quality, cause the scrap rate to rise sharply, greatly increase the production cost, and reduce the market competitiveness of enterprises. CONTENT OF THE INVENTION

[0006] In order to improve the shearing quality of the cleaning cloth, the present application provides a tension adjusting device for a shearing machine.

[0007] The tension adjusting device for a shearing machine provided by the present application adopts the following technical solution:

[0008] The application discloses a tension adjusting device for a cutting machine, comprising a rack, a pay-off roller, a tension adjusting unit, a cutting unit, a dynamic compensation unit and a tensioning roller arranged in sequence along the conveying direction of a cleaning cloth on the rack, the tension adjusting unit comprising a support frame, an adjusting slider vertically slidingly arranged in the support frame, a transmission roller rotatably connecting the two adjusting sliders and a driving member driving the adjusting slider to move vertically, the transmission roller being arranged in parallel with the pay-off roller, and the support frame being provided with one end corresponding to the transmission roller and arranged on the opposite side wall in the rack.

[0009] By adopting the above technical scheme, the cooperation of the pay-off roller and the tension adjusting unit can effectively solve the tension fluctuation problem of the cleaning cloth in the conveying process. The design of the support frame and the adjusting slider in the tension adjusting unit enables the transmission roller to adjust the vertical position according to the actual demand, thereby accurately controlling the tension state of the cleaning cloth. This dynamic adjustment method can not only prevent the cleaning cloth from being broken due to excessive tension, but also avoid the relaxation phenomenon caused by insufficient tension, thereby significantly improving the stability and precision of the cutting operation. Meanwhile, the synergistic effect of the cutting unit and the dynamic compensation unit further optimizes the stress uniformity of the cleaning cloth in the whole conveying path, thereby providing reliable guarantee for subsequent processing.

[0010] Optionally, the driving member comprises a threaded rod and a rotating handle, the threaded rod is vertically arranged, the bottom end of the threaded rod is threadedly rotatably arranged through the top wall of the support frame and connected with the adjusting slider, and the rotating handle is arranged at the top end of the threaded rod.

[0011] By adopting the above technical scheme, the rotating handle drives the threaded rod to rotate, and the threaded cooperation between the threaded rod and the support frame can realize the accurate vertical movement of the adjusting slider. This manual adjustment method is simple to operate and does not require an additional power source, and the position of the transmission roller can be quickly adjusted during the operation of the cutting machine, thereby effectively responding to the tension change of the cleaning cloth in the conveying process, ensuring that the cleaning cloth always maintains an appropriate tension state, and reducing the material deviation or wrinkle phenomenon caused by tension fluctuation.

[0012] Optionally, the cutting unit comprises a guide rail, a plurality of cutting knives and a supporting roller, the guide rail and the supporting roller are arranged in parallel, the plurality of cutting knives are equidistantly sleeved on the guide rail, and the supporting roller is located in front of the cutting knife tip and is rotatably connected to the rack.

[0013] By adopting the above technical scheme, the plurality of cutting knives are equidistantly arranged on the guide rail and cooperated with the supporting roller, the cleaning cloth is stably conveyed towards the cutting knife after being guided by the supporting roller, and the stress uniformity can be maintained during the cutting process. This design effectively reduces the material deviation or damage problem caused by uneven cutting force, significantly reduces the cutting error, thereby greatly improving the qualified rate and production efficiency of the product.

[0014] Optionally, the cutting unit further comprises a distance adjusting assembly, the distance adjusting assembly comprises a bidirectional screw, a push block and a spring, the bidirectional screw is rotationally connected to the rack in parallel with the guide rail, a servo motor coaxially connected to the bidirectional screw is arranged on the rack, one push block is rotationally connected to each thread of the bidirectional screw, the push blocks are collectively and slidably arranged on the end of the guide rail, and one spring is arranged between adjacent cutting knives, the axes of the springs coincide and are arranged in parallel with the guide rail, and the two push blocks are respectively located on the two sides of the distribution direction of the plurality of cutting knives and push the plurality of cutting knives to gather towards the center of the guide rail.

[0015] By adopting the above technical scheme, when different specifications of cleaning cloth need to be cut, the servo motor drives the bidirectional screw to rotate, the rotating bidirectional screw accurately adjusts the relative positions of the two push blocks, and under the elastic action of the springs, the distances between the adjacent cutting knives can be uniformly distributed and kept consistent, thereby realizing flexible adjustment of the distance between the cutting knives and effectively improving the adaptation accuracy and cutting efficiency of the cutting machine for different specifications of cleaning cloth

[0016] Optionally, the dynamic compensation unit comprises two movable arms, a conveying roller and a counterweight, the two movable arms are respectively arranged on the opposite side walls in the rack, one end of each movable arm is rotationally connected to the rack through a rotating shaft, the conveying roller is rotationally connected between the other ends of the two movable arms, the conveying roller is arranged in parallel with the unwinding roller, and the counterweight is arranged on the conveying roller.

[0017] By adopting the above technical scheme, the cooperation structure of the two movable arms and the conveying roller can automatically adjust the position of the conveying roller through the rotation of the movable arms when the tension of the cleaning cloth changes, thereby realizing dynamic compensation of the tension of the cleaning cloth. The arrangement of the counterweight further optimizes this compensation effect, improves the stability of the conveying roller in different tension states, and avoids the phenomenon of slack or over-tightening of the cleaning cloth. This design significantly improves the transmission stability of the cleaning cloth during the cutting process, reduces the risk of wrinkles and breakage, and thus improves the cutting quality and production efficiency.

[0018] Optionally, a limiting structure is arranged on the rack, the limiting structure comprises two limiting columns, the two limiting columns are arranged on the mounting block corresponding to the two limit rotation positions of the movable arm, and the movable arm abuts against the limiting column when rotating to the limit rotation position.

[0019] By adopting the above technical scheme, the arrangement of the limiting column provides a clear physical boundary for the rotation range of the movable arm, reduces the possibility that the conveying roller deviates from the predetermined working area due to excessive swinging of the movable arm, and thus improves the reliability of the entire tension adjusting device.

[0020] Optionally, the limiting structure further comprises a damper, which is arranged between the movable arm and the rack to limit the rotation speed of the movable arm.

[0021] By adopting the above technical scheme, the damper can effectively control the rotation speed of the movable arm, avoiding the rapid swinging of the movable arm under external force, thereby reducing the instability factors caused by inertia of the transmission roller. The improvement of stability helps to ensure the uniform tension of the cleaning cloth during transmission, reduces the risk of wrinkles or breakage caused by tension fluctuation, and further improves the precision and efficiency of the shearing operation.

[0022] Optionally, the unwinding roller comprises a roller shaft, a winding drum core and elastic members, the roller shaft is rotationally connected to the rack, the winding drum core is slidably sleeved on the roller shaft, and the elastic members are arranged at both ends of the winding drum core and abut between the rack and the winding drum core.

[0023] By adopting the above technical scheme, the winding drum core can always maintain stable connection with the rack under the action of the elastic members, effectively reducing the displacement of the winding drum core caused by vibration or external force during unwinding. This design not only improves the stability of the cleaning cloth during unwinding, but also ensures the uniformity of the tension of the cleaning cloth, thereby reducing the problem of wrinkles or breakage caused by tension fluctuation, and significantly improving the continuity of the shearing operation and the product quality.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The cooperation of the unwinding roller and the tension adjusting unit can effectively solve the tension fluctuation problem of the cleaning cloth during transmission. The design of the support frame and the adjusting slide in the tension adjusting unit allows the transmission roller to adjust the vertical position according to the actual needs, thereby accurately controlling the tension state of the cleaning cloth. This dynamic adjustment method not only prevents the cleaning cloth from breaking due to excessive tension, but also avoids the relaxation phenomenon caused by insufficient tension, significantly improving the stability and precision of the shearing operation. At the same time, the cooperation of the cutting unit and the dynamic compensation unit further optimizes the stress uniformity of the cleaning cloth in the entire transmission path, providing reliable protection for subsequent processing;

[0026] 2. The rotating handle drives the threaded rod to rotate, and the threaded cooperation between the threaded rod and the support frame can realize the precise movement of the adjusting slide along the vertical direction. This manual adjustment method is simple to operate and does not require an additional power source, allowing quick adjustment of the position of the transmission roller during the operation of the shearing machine, thereby effectively responding to the tension changes of the cleaning cloth during transmission, ensuring that the cleaning cloth always maintains an appropriate tension state, and reducing the material deviation or wrinkle phenomenon caused by tension fluctuation;

[0027] 3. Multiple cutting knives are arranged at equal intervals on the guide rail and cooperate with the supporting roller. The cleaning cloth is guided by the supporting roller and then smoothly transmitted to the cutting knife. During the cutting process, the force can be evenly maintained. This design effectively reduces the material deviation or damage caused by uneven cutting force, significantly reduces the cutting error, and greatly improves the product qualification rate and production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application.

[0029] Figure 2 is a schematic diagram of the connection relationship between the threaded rod, rotating handle and supporting frame in the embodiment of the present application.

[0030] Figure 3 is a schematic diagram of the connection relationship between the movable arm, transmission roller and counterweight in the embodiment of the present application.

[0031] BRIEF DESCRIPTION OF DRAWINGS:

[0032] 1, rack; 11, servo motor; 2, unwinding roller; 21, roller shaft; 22, reel core; 23, elastic member; 3, tension adjusting unit; 31, supporting frame; 32, adjusting sliding block; 33, transmission roller; 34, driving member; 341, threaded rod; 342, rotating handle; 4, cutting unit; 41, guide rail; 42, cutting knife; 43, supporting roller; 44, distance adjusting assembly; 441, bidirectional screw; 442, push block; 443, spring; 5, dynamic compensation unit; 51, movable arm; 52, transmission roller; 53, counterweight; 6, tensioning roller; 7, limiting structure; 71, limiting column; 72, damper; 8, guide roller. DETAILED DESCRIPTION

[0033] The following will be described in detail in combination with the accompanying Figures 1-3 The present application will be further described in detail.

[0034] The embodiment of the present application discloses a tension adjusting device for a cutting machine.

[0035] Refer to Figure 1 A tension adjusting device for a cutting machine comprises a rack 1, and the rack 1 is sequentially provided with an unwinding roller 2, a tension adjusting unit 3, a cutting unit 4, a dynamic compensation unit 5 and a tensioning roller 6 along the transmission direction of the cleaning cloth.

[0036] Refer to Figure 1 A cleaning cloth reel is mounted on the unwinding roller 2, and the end of the cleaning cloth is sequentially and staggeringly wound through the tension adjusting unit 3, the cutting unit 4 and the dynamic compensation unit 5, and finally adheres to and passes out of the rack 1 from the upper side of the tensioning roller 6, and enters the next process of packaging the cleaning cloth.

[0037] With reference to Figure 1 The unwinding roller 2 comprises a roller shaft 21, a winding drum core 22 and elastic members 23. The roller shaft 21 is made of a seamless steel pipe and is fixed at both ends on the frame 1 by bearings. The winding drum core 22 has an inner hole slightly larger than the outer diameter of the roller shaft 21, and is slidably sleeved on the roller shaft 21 with a certain gap. The elastic members 23 are arranged at both ends of the winding drum core 22, and can be in the form of compression springs or rubber washers. In this embodiment, the elastic members 23 are compression springs. Each compression spring is abutted between the inner side wall of the frame 1 and the end wall of the winding drum core 22, and provides a proper pre-tightening force to prevent the winding drum core 22 from loosening.

[0038] With reference to Figure 1 and Figure 2 The tension adjusting unit 3 comprises a support frame 31, an adjusting slide block 32, a transmission roller 33 and a driving member 34. The support frame 31 is arranged in a box shape, and is fixed on the opposite side walls in the frame 1 corresponding to the ends of the transmission roller 33. The adjusting slide block 32 is vertically slidably arranged in a sliding groove of the support frame 31. The transmission roller 33 is fixed on the adjusting slide block 32 by bearing seats at both ends, and its axis is always parallel to the unwinding roller 2.

[0039] With reference to Figure 2 The driving member 34 comprises a threaded rod 341 and a rotating handle 342. The threaded rod 341 is vertically arranged, and its bottom end is threadedly rotatably penetrated through the top wall of the support frame 31 and fixedly connected with the adjusting slide block 32. The rotating handle 342 is fixedly sleeved on the top end of the threaded rod 341, and is convenient for manual adjustment by an operator.

[0040] With reference to Figure 1 and Figure 2 By manually rotating the rotating handle 342, the threaded rod 341 is driven to rotate, thereby pushing the adjusting slide block 32 to slide up and down along the stand, and further changing the height position of the transmission roller 33. When the cleaning cloth is loosened during unwinding, the height of the transmission roller 33 can be appropriately lowered to increase the tension of the cleaning cloth. Conversely, when the cleaning cloth is too tight, the height of the transmission roller 33 is raised to release the excess tension.

[0041] With reference to Figure 1 and Figure 2 The cutting unit 4 comprises a guide rail 41, a plurality of cutting knives 42, a support roller 43 and a distance adjusting assembly 44. The plurality of cutting knives 42 are equidistantly sleeved on the guide rail 41. The support roller 43 is located in front of the knife tip of the cutting knife 42 and is rotatably connected to the frame 1. The guide rail 41 and the support roller 43 are parallelly arranged and are both mounted on the frame 1.

[0042] With reference to Figure 2, the distance adjusting assembly 44 comprises a bidirectional screw rod 441, push blocks 442 and springs 443, the bidirectional screw rod 441 is rotationally connected to the rack 1 in parallel with the guide rail 41, a servo motor 11 is fixedly arranged on the rack 1, an output shaft of the servo motor 11 rotationally penetrates the rack 1 and is coaxially fixedly connected with the bidirectional screw rod 441. Each of the push blocks 442 is rotationally connected with a thread of the bidirectional screw rod 441, and the push blocks 442 are collectively and slidably arranged on the end of the guide rail 41. Each of the springs 443 is abuttingly fixed between two adjacent cutting knives 42, the axes of the springs 443 are coincident and arranged in parallel with the guide rail 41, and the two push blocks 442 are respectively located on two sides of the distribution direction of the plurality of cutting knives 42 and push the plurality of cutting knives 42 to gather towards the center of the guide rail 41.

[0043] With reference to Figure 2 , the bidirectional screw rod 441 is rotated to move the two push blocks 442 towards or away from each other along the guide rail 41, so as to change the distance between the cutting knives 42. When a wider width of the cleaning cloth needs to be processed, the distance between the cutting knives 42 can be appropriately increased; and when a narrow width of the cleaning cloth needs to be processed, the distance between the cutting knives 42 is reduced.

[0044] With reference to Figure 1 and Figure 3 , the dynamic compensation unit 5 comprises movable arms 51, conveying rollers 52 and counterweights 53, the movable arms 51 are respectively arranged on opposite side walls in the rack 1, and one end of each of the movable arms 51 is rotationally connected to the rack 1 through a rotating shaft. The rack 1 is provided with a limiting structure 7, the limiting structure 7 comprises limiting columns 71 and dampers 72, the limiting columns 71 are respectively arranged on the mounting blocks corresponding to the limit rotating positions of the movable arms 51. The dampers 72 are mounted between the movable arms 51 and the rack 1 to limit the rotating speed of the movable arms 51.

[0045] With reference to Figure 2 , the movable arms 51 abut against the limiting columns 71 when the movable arms 51 are rotated to the limit rotating positions, so as to prevent the cleaning cloth or the equipment from being damaged due to excessive swing. The dampers 72 can adopt an oil pressure type or a magnetorheological type structure, and the damping force can be controlled by adjusting the viscosity of the internal medium. This design can not only ensure that the movable arms 51 quickly respond to the change of the cleaning cloth tension, but also avoid mechanical damage caused by sudden impact.

[0046] With reference to Figure 2 , the conveying rollers 52 are rotationally connected between the other ends of the two movable arms 51, and the conveying rollers 52 are arranged in parallel between the unwinding roller 2 and the conveying roller 52. The counterweights 53 are hung and mounted on the ends of the conveying rollers 52. When the cleaning cloth tension changes, the movable arms 51 automatically adjust the angle under the action of the counterweights 53, and drive the conveying rollers 52 to float up and down, so as to realize the dynamic compensation of the cleaning cloth tension.

[0047] With reference to Figure 1In order to further improve the stability of the cleaning cloth conveying, the rack 1 is further provided with a plurality of guide rollers 8 arranged parallel to the unwinding roller 2.

[0048] The principle of the embodiment of the tension adjusting device for the cutting machine is as follows: the cleaning cloth is wound on the winding drum core 22 and is always closely attached to the roller shaft 21 under the action of the force of the two end compression springs. The end of the cleaning cloth first passes through the lower side of the transmission roller 33, then passes through a guide roller 8, and then enters between the support roller 43 and the plurality of cutting knives 42. The cleaning cloth is cut into a cleaning cloth with a specified size by the cutting knives 42. After the cutting, the cleaning cloth again passes through the guide roller 8, passes through the lower side of the transmission roller 52, and finally passes out of the rack 1 from the upper side of the tensioning roller 6, and enters the next process of packaging the cleaning cloth.

[0049] When the cleaning cloth is loosened during the unwinding process, the threaded rod 341 is rotated by rotating the rotating handle 342 manually, so as to push the adjusting sliding block 32 to slide downward along the stand, and then the height of the transmission roller 33 is appropriately reduced, and the tension of the cleaning cloth is increased. Conversely, when the cleaning cloth is too tight, the height of the transmission roller 33 is raised, and the excess tension is released.

[0050] When the tension of the cut cleaning cloth changes, the movable arm 51 automatically adjusts the angle under the action of the counterweight 53, and drives the transmission roller 52 to float up and down, so as to realize dynamic compensation of the tension of the cleaning cloth.

[0051] The above are the preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A tension adjusting device for a shearing machine, characterized in that... The machine includes a frame (1), on which an unwinding roller (2), a tension adjustment unit (3), a cutting unit (4), a dynamic compensation unit (5), and a tensioning roller (6) are arranged sequentially along the conveying direction of the cleaning cloth. The tension adjustment unit (3) includes a support frame (31), an adjustment slider (32) vertically slidably disposed in the support frame (31), a transmission roller (33) rotatably connecting the two adjustment sliders (32), and a driving component (34) driving the adjustment slider (32) to move vertically. The transmission roller (33) is arranged parallel to the unwinding roller (2). The support frame (31) is provided with one at each end corresponding to the transmission roller (33), and they are respectively arranged on opposite side walls inside the frame (1).

2. The tension adjusting device for a shearing machine according to claim 1, characterized in that... The drive component (34) includes a threaded rod (341) and a rotating handle (342). The threaded rod (341) is arranged vertically, and its bottom end passes through the top wall of the support frame (31) and is connected to the adjusting slider (32) by threaded rotation. The rotating handle (342) is located at the top of the threaded rod (341).

3. A tension adjusting device for a shearing machine according to claim 1, characterized in that... The cutting unit (4) includes a guide rail (41), multiple cutting blades (42) and a support roller (43). The guide rail (41) and the support roller (43) are arranged in parallel. The multiple cutting blades (42) are equally spaced on the guide rail (41). The support roller (43) is located in front of the blade tip of the cutting blade (42) and is rotatably connected to the frame (1).

4. A tension adjusting device for a shearing machine according to claim 3, characterized in that... The cutting unit (4) also includes a spacing adjustment component (44), which includes a bidirectional screw (441), a push block (442), and a spring (443). The bidirectional screw (441) is rotatably connected to the frame (1) parallel to the guide rail (41). A servo motor (11) coaxially connected to the bidirectional screw (441) is provided on the frame (1). Each push block (442) is rotatably connected to each thread of the bidirectional screw (441), and the push blocks (442) are slidably sleeved on the end of the guide rail (41). Each spring (443) is provided between two adjacent cutting blades (42). The axes of several springs (443) overlap and are set parallel to the guide rail (41). The two push blocks (442) are located on both sides of the distribution direction of multiple cutting blades (42) and push the multiple cutting blades (42) toward the center of the guide rail (41).

5. A tension adjusting device for a shearing machine according to claim 1, characterized in that... The dynamic compensation unit (5) includes two movable arms (51), a conveyor roller (52), and a counterweight (53). The two movable arms (51) are respectively set on opposite side walls inside the frame (1). One end of each movable arm (51) is rotatably connected to the frame (1) via a rotating shaft. The conveyor roller (52) is rotatably connected between the other ends of the two movable arms (51) and is arranged parallel to the unwinding roller (2). The counterweight (53) is set on the conveyor roller (52).

6. A tension adjusting device for a shearing machine according to claim 5, characterized in that... The frame (1) is provided with a limiting structure (7), which includes two limiting posts (71). The two limiting posts (71) are respectively set on the mounting block at the two extreme rotation positions of the movable arm (51). When the movable arm (51) rotates to the extreme rotation position, it abuts against the limiting post (71).

7. A tension adjusting device for a shearing machine according to claim 6, characterized in that... The limiting structure (7) also includes a damper (72), which is disposed between the movable arm (51) and the frame (1) to limit the rotation speed of the movable arm (51).

8. A tension adjusting device for a shearing machine according to claim 1, characterized in that... The unwinding roller (2) includes a roller shaft (21), a winding core (22), and an elastic element (23). The roller shaft (21) is rotatably connected to the frame (1). The winding core (22) is slidably sleeved on the roller shaft (21). The elastic element (23) is provided at both ends of the winding core (22) and abuts between the frame (1) and the winding core (22).

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