Multi-index adjustable angle leather patch cutting machine

Abstract

The utility model discloses a kind of adjustable angle leather patch cutting machines of multiple graduation, including a pedestal, by lifting cutter assembly, rotating clamping assembly, inclination adjustment assembly and length adjusting assembly are integrated from top to bottom in pedestal, form the overall structure of modularization, both realize the full-process function coverage of "cutter lifting-material clamping rotation-angle inclination-length adaptation" when leather patch cutting, again let each component layout clear, operation does not interfere with each other, different size, angle leather patch cutting demand can be flexibly adapted, solve the problem that traditional cutting machine function is single, cannot multidimensional adjustment, while simplifying operation process, improve equipment stability and durability, satisfy diversified leather processing demand.

Description

Technical Field

[0001] This utility model relates to the technical field of leather patch cutting equipment, and more specifically to a multi-division adjustable angle leather patch cutting machine. Background Technology

[0002] In the field of leather decoration and jewelry processing, polygonal beveled leather patches are a commonly used component that combines decoration and texture. The main body is a sheet of leather structure, usually in the shape of an octagon or other polygons, and the edges are designed with a beveled facet similar to a diamond cut (i.e., a chamfered edge). This beveled facet gives the leather patch a richer three-dimensionality and gloss layer. Therefore, it is widely used in the surface decoration and interlayer splicing of high-end handmade leather goods (such as wallets and handbags), or as the main shape of leather badges, pendants and other accessories. It is especially common in the customized works of light luxury handmade leather goods brands, and can effectively enhance the product’s exquisiteness.

[0003] Currently, the processing of these leather patches usually adopts a step-by-step process: first, according to the design dimensions, polygonal base pieces of corresponding shapes are cut out from the leather raw materials, and then the edges of the polygonal base pieces are beveled and polished by manual operation.

[0004] However, the existing processing method has significant drawbacks: on the one hand, the process is divided into two separate steps, "polygon cutting" and "edge beveling and grinding", which require different operating equipment and personnel, making the processing process cumbersome and the production efficiency low; on the other hand, since the length and angle of each side of the polygon patch of different specifications are different, it is difficult to accurately control the cutting size and beveling angle during manual operation, which can easily lead to problems such as substrate shape deviation and uneven edge grinding, resulting in poor product consistency and high defect rate. At the same time, the labor cost accounts for a large proportion and is difficult to adapt to the needs of large-scale production. Utility Model Content

[0005] This invention addresses the problems of traditional leather patch cutting machines, such as limited functionality, inability to achieve multi-dimensional adjustments (angle, length, cutting depth), poor material clamping stability, cumbersome operation, and low cutting accuracy. It provides a multi-functional device integrating "cutter lifting, material rotation clamping, angle tilting, and length adjustment," enabling precise cutting of leather patches of different sizes, thicknesses, and tilt angles. At the same time, it simplifies the operation process, improves equipment stability and durability, and meets the diverse needs of leather processing.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a multi-division adjustable angle leather patch cutting machine, characterized in that it includes a base, on which a lifting cutter assembly, a rotating clamping assembly, a tilting adjustment assembly, and a length adjustment assembly are sequentially arranged from top to bottom; the lifting cutter assembly includes a column erected and connected to the base, a cutter holder provided in the middle section of the column, and a rack that can slide relative to the cutter holder is disposed through the rack; a blade is connected to the lower free end of the rack; a gear meshes with the rack on its side, and the gear is rotatably mounted. The gear is mounted on a tool holder, with its rotating shaft extending out of the tool holder. A first handle is connected to the extended end of the rotating shaft. The rotating clamping assembly includes a ramp, with a rotating unit on one side and a clamping unit on the other side. The rotating unit is positioned directly below the blade. The tilt adjustment assembly includes an arc-shaped swing base for fixing the ramp and an arc-shaped rail for supporting the arc-shaped swing base. The arc-shaped swing base can slide relative to the arc-shaped rail to adjust the tilt angle. The length adjustment assembly includes a slide plate for fixing the arc-shaped rail. The slide plate is slidably mounted on the base via a slide rail and a slider.

[0007] This utility model integrates the lifting cutter assembly, rotating clamping assembly, tilting adjustment assembly, and length adjustment assembly from top to bottom into a base, forming a modular overall structure. This achieves full-process functional coverage of "cutter lifting - material clamping and rotating - angle tilting - length adaptation" during leather patch cutting, while ensuring clear layout of each component and no interference between their operations. It can flexibly adapt to the cutting needs of leather patches of different sizes and angles, solving the problem of traditional cutting machines having single functions and being unable to adjust in multiple dimensions.

[0008] Preferably, a tension spring is provided between the upper free end of the rack and the top of the column, and a guide sleeve adapted to the rack is provided on the tool holder.

[0009] This invention features a tension spring between the free end of the rack and the top of the column, which automatically pulls the rack back to its original position when the first handle is released, preventing the blade from being in a falling state for a long time, thus avoiding safety hazards or component wear. At the same time, the guide sleeve on the blade holder can accurately guide the rack's sliding, preventing the rack from deviating during sliding and causing the blade to cut inaccurately, thus significantly improving the stability of the cutter's lifting and lowering and the safety of operation.

[0010] Preferably, the upper free end of the rack is provided with a stop plate arranged perpendicular to it, and the stop plate is provided with a downwardly extending stop pin on the side facing the tool holder; a movable gap is maintained between the stop pin and the guide sleeve, and the size of the movable gap is limited by the tension state of the tension spring.

[0011] This invention, through the cooperation of a stop plate and a stop pin, can limit the maximum descent distance of the rack, preventing excessive rack descent and damage to the blade and the lower rotating unit due to improper operation. The movable gap between the stop pin and the guide sleeve is limited by the tension spring, which ensures the normal sliding range of the rack and eliminates the need for additional complex limiting structures, simplifying component design and reducing equipment failure rate.

[0012] Preferably, the rotating unit includes a ball disk mounted on an inclined platform. The ball disk has several equally spaced holes arranged in a circle, and each hole contains a ball that rolls freely within the hole, with its upper end protruding from the upper surface of the ball disk. A ratchet disk is fitted above the ball disk, and the ratchet disk has several positioning holes on its inner surface facing the ball disk. Each positioning hole corresponds to a ball on the ball disk, allowing the ball to be inserted. The ratchet disk can rotate relative to the ball disk. When the ratchet disk rotates, the balls drive the ratchet disk to rotate in a stepwise manner by aligning and alternating between the positioning holes and the holes. A rotating platform is fixedly mounted on the ratchet disk, and an anti-slip pad is provided on the upper surface of the rotating platform.

[0013] This invention utilizes the cooperation between the ball bearings on the ball bearing plate and the positioning holes on the ratchet plate to enable the ratchet plate to rotate in a step-by-step manner. This allows for precise control of the rotation angle of the rotary table, meeting the multi-section cutting requirements of leather patches. At the same time, the anti-slip pad on the rotary table enhances the friction between the leather patch and the rotary table, preventing material slippage during cutting and ensuring neat cutting edges. This solves the problems of low angle control accuracy and easy material displacement in traditional rotary mechanisms.

[0014] Preferably, a retaining ring is fitted around the outside of the ratchet disc, and a ratchet seat is integrally formed on one side of the retaining ring; two opposing pawls are provided inside the ratchet seat, each pawl is equipped with a compression spring, the compression spring is used to provide a preload force to the pawl toward the ratchet disc; a conversion lever is provided between the two pawls, the conversion lever is rotatably mounted on the ratchet seat, and by rotating the conversion lever, the ends of the two pawls can be selectively engaged or disengaged from the ratchet disc respectively; a second handle extends from the side of the ratchet seat.

[0015] This invention uses a ratchet seat and pawl on the outside of the clamping ring, in conjunction with a compression spring, to lock the rotation direction of the ratchet disc in one direction, preventing accidental reverse rotation of the ratchet disc during cutting and thus avoiding angle deviation. The conversion lever can flexibly control the engagement or disengagement of the pawl and the ratchet disc, ensuring stability during operation and making it convenient to unlock the ratchet disc when the rotation angle needs to be adjusted. The operation is convenient and the locking reliability is high.

[0016] Preferably, the clamping unit includes a hinged seat fixed to the inclined platform, on which a lever is hinged; one end of the lever is suspended above the rotating platform of the rotating unit, and a rotating head is rotatably mounted on this end, the rotation direction of the rotating head being consistent with the rotation direction of the rotating platform; a top post is provided below the other end of the lever away from the rotating platform, the end face of the top post that contacts the lever is inclined, and a third handle is connected to the side of the top post, by rotating the third handle, the inclined surface of the top post can be driven to change, so that the inclined surface at the upper end of the top post contacts the lever and pushes the lever, thereby adjusting the extension angle of the lever; a preload spring is also connected to the side of the lever away from the rotating platform, the other end of the preload spring is connected to the inclined platform, used to apply a continuous pulling preload force to the lever to maintain its position stability, so that the end of the lever near the rotating platform always has a tendency to press against the rotating platform.

[0017] The rotating head at one end of the lever of this utility model rotates synchronously with the rotating table, which can clamp the leather patch without affecting the rotation of the material driven by the rotating table, ensuring that the material is always clamped during the cutting process. The inclined surface design of the top column, together with the third handle, can accurately adjust the extension angle of the lever and can also adapt to the clamping requirements of leather patches of different thicknesses. With the assistance of the pre-tension spring, it can avoid the lever from loosening and causing insufficient clamping force, thus improving the adaptability and stability of material clamping.

[0018] Preferably, an arc-shaped track plate is provided on each side of the arc-shaped swing base, with the arc-shaped surface of the track plate protruding downwards; an arc-shaped track groove is provided on the arc-shaped track base corresponding to the position of the arc-shaped track plate, and each arc-shaped track groove is adapted to the arc-shaped track plate on the corresponding side, allowing the arc-shaped track plate to be inserted and slide along the arc-shaped track groove; a locking bolt is also provided on the side of the arc-shaped track base, the locking bolt passes through the arc-shaped track base in a direction perpendicular to the sliding direction of the arc-shaped track groove, and the end of the locking bolt can be pressed against the side wall of the arc-shaped swing base to limit the sliding of the arc-shaped swing base relative to the arc-shaped track base and fix the tilt angle of the arc-shaped swing base after adjustment.

[0019] The curved track plate of this utility model slides in conjunction with the curved track groove of the curved rail seat, which enables smooth adjustment of the tilt angle and precise control of the cutting tilt angle of the leather patch, meeting the processing requirements of patches with different tilt surfaces. The locking bolt can quickly tighten the curved rail seat after the angle adjustment is completed, preventing the curved rail seat from sliding and causing the angle to deviate during operation. The adjustment is convenient and the locking is firm, improving the accuracy and reliability of the angle adjustment.

[0020] Preferably, the slide rail has two parallel rails, and each rail is equipped with a pair of sliders. The four sliders together support the slide plate and drive it to slide along the length of the slide rail.

[0021] This utility model uses two parallel slide rails and four sets of sliders to support the slide plate, which increases the contact area between the slide plate and the slide rails and ensures the stability of the slide plate during sliding, preventing the upper components from shifting due to the slide plate tilting. At the same time, the multi-slider support structure can distribute the weight of the slide plate and the upper components, reduce slide rail wear, extend the service life of the equipment, and solve the problems of unstable sliding and easy wear of traditional single slide rail structures.

[0022] Preferably, a sliding column is suspended on the base, with one end fixedly connected to the base and the other end free. A connecting seat is slidably fitted onto the sliding column, and the connecting seat is fixedly connected to the slide plate. The length direction of the sliding column and the slide rail remain parallel. A push spring in a compressed state is fitted onto the sliding column, and the push spring is located on the section of the sliding column between the connecting seat and the base, for applying a thrust towards the free end of the sliding column to the connecting seat. A dial wheel is rotatably mounted on the base, and the dial wheel is located on one side of the slide plate. The radial surface of the dial wheel has at least three adjusting protrusions, each with a different protrusion height. A fourth handle is also connected to the side of the dial wheel. By rotating the fourth handle, the dial wheel can be rotated, causing the adjusting protrusions of different heights to selectively contact the side wall of the slide plate, thereby adjusting the sliding position of the slide plate along the slide rail.

[0023] The sliding column and connecting seat of this utility model provide additional guidance for the sliding of the skateboard, further improving the stability of the skateboard sliding along the rail; the compressed state of the push spring can assist the skateboard to reset, reducing the intensity of manual pushing of the skateboard; and the adjustment protrusions of different heights on the dial can quickly adjust the position of the skateboard by turning the fourth handle, achieving precise adaptation of the cutting length, eliminating the need for tedious manual measurement and adjustment, and significantly improving the efficiency and accuracy of length adjustment.

[0024] Preferably, the adjustment protrusion includes a bead sleeve and a top bead, with the top bead housed inside the bead sleeve; the bead sleeve is fixedly connected to the radial wheel surface of the dial wheel, and the end face of the top bead protrudes outside the bead sleeve, with the top bead protruding at different heights in each adjustment protrusion to achieve differentiated adjustment of the sliding position of the skateboard.

[0025] This invention designs the adjustment protrusion as a combination of a bead sleeve and a top bead. The top bead can move slightly within the bead sleeve. When the adjustment protrusion contacts the side wall of the slide plate, the top bead can reduce the friction with the slide plate by rolling, avoiding hard friction between the two and causing wear on the parts. At the same time, different adjustment levels can be achieved by controlling the protrusion height of the top bead, which not only ensures the adjustment accuracy, but also extends the service life of the dial and the slide plate, and improves the durability of the length adjustment mechanism.

[0026] Beneficial effects: (1) Multi-dimensional adjustment and wide adaptability: The cutting depth is adjusted by the lifting cutter assembly, the multi-division angle control is achieved by the rotating clamping assembly, the tilt adjustment assembly is adapted to different tilt surfaces, and the length adjustment assembly is adapted to different sizes of patches. The four components work together to cover the full-dimensional adjustment needs of "depth-angle-tilt-length", which can flexibly cope with various leather patch cutting scenarios and solve the problems of single function and poor adaptability of traditional equipment.

[0027] (2) High cutting precision and excellent finished product quality: The guide sleeve provides precise guidance to the rack, the ball and ratchet rotate in a step-by-step manner, the anti-slip pad prevents displacement, and the top ball and ball sleeve have a low-friction adjustment design. The entire process from cutter positioning, material rotation, material fixing to length adaptation ensures precision, effectively avoids problems such as cutting deviation and uneven edges, and significantly improves the pass rate of leather patch cutting finished products.

[0028] (3) Convenient and labor-saving operation with strong safety: The first handle controls the lifting and lowering of the cutter, the second handle adjusts the ratchet locking, the third handle controls the clamping force, and the fourth handle adjusts the length. Each function is independent and convenient to operate; the pull spring automatically resets the cutter, the stop pin limits the excessive sliding of the rack, and the push spring assists the slide plate in resetting, which reduces the intensity of manual operation and avoids the risk of component collision or misoperation, thus improving the safety and ease of use of the equipment.

[0029] (4) Stable and durable structure with low wear rate: The support structure of double slide rail with four sliders, the double guidance of slide column and connecting seat, the rolling of top ball to reduce friction, and the reliable locking of pawl and compression spring. The structural design is optimized in many aspects from support, guidance, friction protection to locking, reducing hard wear and failure probability of components, extending the overall service life of equipment, and reducing the later maintenance cost.

[0030] (5) Modular integration and reasonable layout: The four functional components are integrated into the base from top to bottom. Each component works independently and does not interfere with each other. This simplifies the overall structure of the equipment, saves installation space, and facilitates the later maintenance or replacement of individual components, reducing the complexity of equipment assembly and maintenance, and improving the overall practicality and economy of the equipment. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Front view; Figure 3 for Figure 1 Left side view; Figure 4 This is a schematic diagram of the lifting cutter assembly of this utility model; Figure 5 This is a schematic diagram of the structure of the rotary clamping assembly of this utility model; Figure 6 This is a schematic diagram of the structure of the rotating unit of this utility model; Figure 7 This is a schematic diagram of the clamping unit of this utility model; Figure 8 This is a schematic diagram of the tilt adjustment component of this utility model; Figure 9 This is a schematic diagram of the length adjustment component of this utility model; Figure 10 This is a schematic diagram of the structure of the push spring and other components of this utility model; Figure 11 This is a schematic diagram of the structure of the dial and other components of this utility model.

[0032] In the diagram: 1-Base, 2-Lifting cutter assembly, 3-Rotating clamping assembly, 4-Tilting adjustment assembly, 5-Length adjustment assembly, 6-Column, 7-Cut holder, 8-Rack, 9-Blade, 10-Gear, 11-First handle, 12-Tension spring, 13-Guide sleeve, 14-Stop plate, 15-Stop pin, 16-Slope, 17-Ball bearing, 18-Ball, 19-Ratchet, 20-Positioning hole, 21-Rotating table, 22-Anti-slip pad, 23-Holding ring, 24-Ratchet seat, 25-Pawl, 26- Compression spring, 27-converter lever, 28-second handle, 29-hinge seat, 30-lever, 31-top column, 32-third handle, 33-preload spring, 34-rotating head, 35-arc-shaped swing seat, 36-arc-shaped rail seat, 37-arc-shaped track plate, 38-each arc-shaped track groove, 39-locking bolt, 40-slide plate, 41-slide rail, 42-slider, 43-slide column, 44-connecting seat, 45-push spring, 46-dial wheel, 47-bead sleeve, 48-top bead, 49-fourth handle, 50-embedded hole. Detailed Implementation

[0033] To make the technical means, creative features and objectives of this utility model easier to understand, the following describes this utility model in conjunction with specific embodiments.

[0034] Example: Figure 1 , Figure 2 and Figure 3 As shown, a multi-division adjustable angle leather patch cutting machine includes a base 1, on which a lifting cutter assembly 2, a rotating clamping assembly 3, a tilting adjustment assembly 4 and a length adjustment assembly 5 are arranged sequentially from top to bottom.

[0035] like Figure 4As shown, the lifting cutter assembly 2 includes a column 6 erected and connected to a base. A cutter holder 7 is provided in the middle section of the column 6. A rack 8 that can slide relative to the cutter holder is installed through the cutter holder 7. A blade 9 is connected to the lower free end of the rack 8. A gear 10 is engaged with the side of the rack 8. The gear 10 is rotatably mounted on the cutter holder 7, and the rotation shaft of the gear 10 extends out of the cutter holder. A first handle 11 is connected to the extended end of the rotation shaft. A tension spring 12 is pulled between the upper free end of the rack 8 and the top of the column 6. A guide sleeve 13 adapted to the rack 8 is provided on the cutter holder 7.

[0036] The upper free end of the rack 8 is provided with a stop plate 14 arranged perpendicularly thereto. The side of the stop plate 14 facing the tool holder 7 is provided with a downwardly extending stop pin 15. There is a movable gap between the stop pin 15 and the guide sleeve 13. The size of the movable gap is limited by the tension state of the tension spring 12.

[0037] like Figure 5 As shown, the rotary clamping assembly 3 includes a ramp 16, with a rotating unit on one side and a clamping unit on the other side, and the rotating unit is correspondingly positioned directly below the blade 9.

[0038] like Figure 6 As shown, the rotating unit includes a bead plate 17 mounted on an inclined platform. The bead plate 17 has eight equally spaced recesses 50 arranged in a circle. Each recess 50 contains a ball 18, which rolls freely within the recess 50, with its upper end protruding from the upper surface of the bead plate 17. A ratchet plate 19 is fitted above the bead plate 17. The ratchet plate 19 has eight positioning holes 20 on its inner surface facing the bead plate 17. Each positioning hole 20 corresponds one-to-one with a ball 18 on the bead plate 19, allowing the ball 18 to be inserted. The ratchet plate 19 can rotate relative to the bead plate 17. When the ratchet plate 19 rotates, the balls 18 drive the ratchet plate 19 to rotate in a stepwise manner by alternating the alignment and interleaving of the positioning holes 20 and the recesses 50. A rotating platform 21 is fixedly mounted on the ratchet plate 19, and an anti-slip pad 22 is provided on the upper surface of the rotating platform 21.

[0039] A retaining ring 23 is fitted on the outer side of the ratchet disc 19, and a ratchet seat 24 is integrally formed on one side of the retaining ring 23. Two pawls 25 are arranged opposite to each other in the ratchet seat 24. Each pawl 25 is equipped with a compression spring 26, which provides a preload force to the pawl 25 toward the ratchet disc 19. A conversion lever 27 is provided between the two pawls 25. The conversion lever 27 is rotatably mounted on the ratchet seat 24. By rotating the conversion lever 27, the ends of the two pawls 25 can be selectively engaged or disengaged from the ratchet disc 19. A second handle 28 extends from the side of the ratchet seat 24.

[0040] like Figure 7As shown, the clamping unit includes a hinge seat 29 fixed on the inclined platform, and a lever 30 is hinged to the hinge seat 29. One end of the lever 30 is suspended above the rotary table 21 of the rotating unit, and a rotating head 34 is rotatably mounted on this end. The rotation direction of the rotating head 34 is the same as the rotation direction of the rotary table 21. A top post 31 is provided below the other end of the lever 30 away from the rotary table 21. The end face of the top post 31 that contacts the lever 30 is inclined. A third handle 32 is connected to the side of the top post 31. Rotating the third handle 32 can drive the tilting surface of the top column 31 to change, so that the tilting surface at the upper end of the top column 31 contacts the lever 30 and pushes the lever 30, thereby adjusting the extension angle of the lever 30; a pre-tension spring 33 is also connected to the side of the lever 30 away from the rotary table 21, and the other end of the pre-tension spring 33 is connected to the inclined table 16, which is used to apply a continuous pulling pre-tension force to the lever 30 to keep its position stable, so that the end of the lever 30 close to the rotary table 21 always has the tendency to press against the rotary table 21.

[0041] like Figure 8 As shown, the tilt adjustment assembly 4 includes an arc-shaped swing base 35 for fixing the inclined platform 16 and an arc-shaped rail base 36 for supporting the arc-shaped swing base 35. The arc-shaped swing base 35 can slide relative to the arc-shaped rail base 36 to adjust the tilt angle. An arc-shaped rail plate 37 is provided on each side of the arc-shaped swing base 35, and the arc-shaped surface of the arc-shaped rail plate 37 protrudes downward. An arc-shaped rail groove 38 is provided on the arc-shaped rail base 36 at the position corresponding to the position of the arc-shaped rail plate 37. Each arc-shaped rail groove 38 is adapted to the arc-shaped rail plate 37 on the corresponding side, allowing the arc-shaped rail plate to be inserted and slide along the arc-shaped rail groove 38. A locking bolt 39 is also provided on the side of the arc-shaped rail base 36. The locking bolt 39 passes through the arc-shaped rail base 36 in a direction perpendicular to the sliding direction of the arc-shaped rail groove 38, and the end of the locking bolt 39 can be pressed against the side wall of the arc-shaped swing base 35 to limit the sliding of the arc-shaped swing base 35 relative to the arc-shaped rail base 36, thereby fixing the tilt angle of the arc-shaped swing base 35 after adjustment.

[0042] like Figure 9 As shown, the length adjustment assembly 5 includes a slide plate 40 for fixing the arc-shaped rail base. The slide plate 40 is slidably mounted on the base 1 via a slide rail 41 and sliders 42. There are two slide rails 41 arranged in parallel, and each slide rail 41 is equipped with a pair of sliders 42. The four sliders 42 together support the slide plate 40 and drive it to slide along the length direction of the slide rail 31.

[0043] like Figure 10As shown, a sliding column 43 is suspended on the base 1. One end of the sliding column 43 is fixedly connected to the base 1, and the other end is a free end. A connecting seat 44 is slidably sleeved on the sliding column 43. The connecting seat 44 is fixedly connected to the sliding plate 40, and the length direction of the sliding column 43 and the slide rail 41 are parallel. A push spring 45 in a stored and compressed state is sleeved on the sliding column 43. The push spring 45 is limited to the sliding column section between the connecting seat 44 and the base 1 and is used to apply a thrust to the connecting seat 44 in the direction of the free end of the sliding column 43.

[0044] like Figure 11 As shown, a dial wheel 46 is rotatably mounted on the base 1, and the dial wheel 46 is located on one side of the slide plate 40. The radial surface of the dial wheel 46 is provided with three adjustment protrusions, each with a different protrusion height. A fourth handle 49 is also connected to the side of the dial wheel 46. By rotating the fourth handle 49, the dial wheel 46 can be rotated, so that the adjustment protrusions of different heights selectively contact the side wall of the slide plate 40 to adjust the sliding position of the slide plate 40 along the slide rail 41.

[0045] The adjustment protrusion includes a bead sleeve 47 and a top bead 48, with the top bead 48 housed inside the bead sleeve 47. The bead sleeve 47 is fixedly connected to the radial wheel surface of the dial wheel 46, and the end face of the top bead 48 protrudes outside the bead sleeve 47. The protrusion height of the top bead 48 in each adjustment protrusion is different, so as to achieve differentiated adjustment of the sliding position of the skateboard 40.

[0046] Working process: When using, first adjust the tilt: loosen the locking bolts on the side of the arc-shaped rail seat, push the arc-shaped swing seat to drive the arc-shaped track plates on both sides to slide along the arc-shaped track groove of the arc-shaped rail seat. The arc-shaped movement of the arc-shaped swing seat will simultaneously drive the upper inclined platform and the rotating platform to adjust the tilt angle, so as to match the required R angle for cutting the leather patch. After the angle is determined, tighten the locking bolts to fix the arc-shaped swing seat.

[0047] Next, the material is clamped: the leather patch is placed on the anti-slip pad of the rotating unit, and the third handle is turned to drive the top column to rotate. The inclined surface at the top of the top column changes the lifting height with the rotation, which in turn pushes the lever to rotate around the hinge seat, so that the rotating head at the other end of the lever presses against the leather patch. The pre-tension spring provides stable tension to ensure that the rotating head keeps pressing. At the same time, since both the rotating head and the anti-slip pad can rotate, space is reserved for subsequent radial rotation adjustment of the leather patch in multiple increments.

[0048] The cutting cycle then begins. Taking the cutting of an octagonal leather patch as an example, the following process needs to be repeated eight times: (1) Length adjustment: Turn the fourth handle to drive the dial to rotate and select the top ball that matches the current wheel edge cutting requirements (different protrusion heights of the top ball correspond to different cutting lengths). After the top ball pushes the slide plate, the slide plate is tightly pressed against the top ball under the tension of the push spring, keeping the current length position stable. (2) Cutting operation: Rotate the first handle to make the gear mesh with the rack and slide vertically down along the guide sleeve of the cutter holder. The blade at the lower end of the rack moves down synchronously to complete one wheel edge cut. The stop pin and the guide sleeve cooperate to prevent the rack from sliding down too much, while the guide sleeve ensures the stability of the rack movement during the cutting process. (3) Indexing rotation: Turn the second handle, and drive the pawl in the ratchet seat to cooperate with the ratchet disc through the conversion rod, and turn the rotary table to drive the leather patch to rotate by a preset angle, and switch to the cutting position of the next wheel edge.

[0049] Repeat the above "length adjustment - cutting operation - indexing rotation" process to the preset number of times (e.g., repeat eight times to cut an octagon) to complete the cutting of all the edges of the leather patch and obtain the finished product of the target shape.

Claims

1. A multi-division adjustable angle leather patch cutting machine, characterized in that, It includes a base, on which a lifting cutter assembly, a rotating clamping assembly, a tilting adjustment assembly and a length adjustment assembly are arranged sequentially from top to bottom; The lifting cutter assembly includes a column erected on a base, a cutter holder in the middle section of the column, a rack that can slide relative to the cutter holder through the cutter holder, a blade connected to the lower free end of the rack, a gear meshing on the side of the rack, the gear being rotatably mounted on the cutter holder, and the rotation shaft of the gear extending out of the cutter holder, and a first handle connected to the extended end of the rotation shaft. The rotary clamping assembly includes a ramp, with a rotating unit on one side and a clamping unit on the other side, and the rotating unit is correspondingly positioned directly below the blade. The tilt adjustment assembly includes an arc-shaped pendulum seat for fixing the inclined platform and an arc-shaped rail seat for supporting the arc-shaped pendulum seat. The arc-shaped pendulum seat can slide relative to the arc-shaped rail seat to adjust the tilt angle. The length adjustment assembly includes a slide plate for fixing the arc-shaped rail base, the slide plate being slidably mounted on the base via a slide rail and a slider.

2. The multi-division adjustable angle leather patch cutting machine according to claim 1, characterized in that, A tension spring is connected between the upper free end of the rack and the top of the column, and a guide sleeve adapted to the rack is provided on the tool holder.

3. The multi-division adjustable angle leather patch cutting machine according to claim 2, characterized in that, The upper free end of the rack is provided with a stop plate arranged perpendicularly thereto, and the stop plate is provided with a downwardly extending stop pin on the side facing the tool holder; a movable gap is maintained between the stop pin and the guide sleeve, and the size of the movable gap is limited by the tension state of the tension spring.

4. The multi-division adjustable angle leather patch cutting machine according to claim 1, characterized in that, The rotating unit includes a bead plate mounted on an inclined platform. The bead plate has several holes arranged in a circle and at equal intervals. Each hole contains a ball, which rolls freely in the hole, and the upper end of the ball protrudes from the upper surface of the bead plate. A ratchet disc is provided above the bead disc. The ratchet disc has several positioning holes on its inner surface facing the bead disc. Each positioning hole corresponds to a ball on the bead disc and allows the ball to be inserted. The ratchet disc can rotate relative to the ball disc. When the ratchet disc rotates, the balls drive the ratchet disc to achieve step-by-step rotation by aligning and alternating between the positioning hole and the locking hole. A rotating platform is fixedly mounted on the ratchet disc, and an anti-slip pad is provided on the upper surface of the rotating platform.

5. The multi-division adjustable angle leather patch cutting machine according to claim 4, characterized in that, A retaining ring is fitted around the outside of the ratchet disc, and a ratchet seat is integrally formed on one side of the retaining ring; The ratchet seat has two oppositely arranged pawls, each pawl is equipped with a compression spring, the compression spring is used to provide a preload force to the pawl toward the ratchet disc; A conversion lever is provided between the two pawls. The conversion lever is rotatably mounted on the ratchet seat. By rotating the conversion lever, the ends of the two pawls can be selectively engaged or disengaged from the ratchet disc, respectively. A second handle extends from the side of the ratchet seat.

6. The multi-division adjustable angle leather patch cutting machine according to claim 4 or 5, characterized in that, The clamping unit includes a hinged seat fixed to an inclined platform, on which a lever is hinged; One end of the lever is suspended above the rotating platform of the rotating unit, and a rotating head is rotatably mounted on this end. The rotation direction of the rotating head is the same as the rotation direction of the rotating platform. A top post is provided below the other end of the lever away from the rotary table. The end face of the top post that contacts the lever is inclined. A third handle is connected to the side of the top post. By rotating the third handle, the inclined surface of the top post can be driven to change, so that the inclined surface at the upper end of the top post contacts the lever and pushes the lever, thereby adjusting the extension angle of the lever. A preload spring is also connected to the side of the lever away from the turntable, and the other end of the preload spring is connected to the inclined platform.

7. The multi-division adjustable angle leather patch cutting machine according to claim 1, characterized in that, An arc-shaped track plate is provided on each side of the arc-shaped swing base, and the arc-shaped surface of the arc-shaped track plate protrudes downward; An arc-shaped track groove is provided on the arc-shaped track base at the position corresponding to the arc-shaped track plate. Each arc-shaped track groove is adapted to the arc-shaped track plate on the corresponding side, allowing the arc-shaped track plate to be inserted and slide along the arc-shaped track groove. A locking bolt is also provided on the side of the arc-shaped rail seat. The locking bolt passes through the arc-shaped rail seat along the sliding direction perpendicular to the arc-shaped rail groove, and the end of the locking bolt can be pressed against the side wall of the arc-shaped swing seat.

8. The multi-division adjustable angle leather patch cutting machine according to claim 1, characterized in that, The slide rail has two parallel rails, and each rail is equipped with a pair of sliders. The four sliders together support the slide plate and drive it to slide along the length of the slide rail.

9. The multi-division adjustable angle leather patch cutting machine according to claim 1 or 8, characterized in that, A sliding column is suspended on the base, with one end of the sliding column fixedly connected to the base and the other end being free; a connecting seat is slidably sleeved on the sliding column, and the connecting seat is fixedly connected to the sliding plate, and the length direction of the sliding column and the slide rail are kept parallel. A push spring in a compressed state is sleeved on the slide column, and the push spring is limited to the slide column section between the connecting seat and the base; A dial is rotatably mounted on the base, and the dial is located on one side of the slide plate; The dial wheel has at least three adjustment protrusions on its radial surface, and the protrusion height of each adjustment protrusion is different. A fourth handle is also connected to the side of the dial. By turning the fourth handle, the dial can be rotated, so that the adjustment protrusions of different heights can selectively contact the side wall of the skateboard.

10. The multi-division adjustable angle leather patch cutting machine according to claim 9, characterized in that, The adjustment protrusion includes a bead sleeve and a top bead, with the top bead housed inside the bead sleeve; The bead sleeve is fixedly connected to the radial surface of the dial wheel, the end face of the top bead protrudes outside the bead sleeve, and the protrusion height of the top bead in each adjustment protrusion is different.

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