Automatic feeding mechanism of the cutting machine

Abstract

This utility model provides an automatic feeding mechanism for a cutting machine, belonging to the field of mechanical technology. It solves the problem of poor feeding stability caused by the poor operation stability of synchronous belts. It includes a support frame, a feeding assembly, a driving pulley, a driven pulley, and a synchronous belt fitted over the driving and driven pulleys. A connecting seat is fixed to the upper horizontal portion of the synchronous belt, and the feeding assembly is fixed to the upper side of the connecting seat. The support frame has a guide beam, with the upper horizontal portion of the synchronous belt located above the guide beam and the connecting seat slidably mounted on the guide beam. The guide beam is square-tube shaped and closed at the front end. A support seat is fixedly connected to the front end of the guide beam, and the driven pulley is rotatably mounted behind the support seat. A first notch is provided on the upper side of the front end of the guide beam, with the bottom of the driven pulley located within the first notch. The bottom of the driving pulley is located behind the guide beam, and the lower horizontal portion of the synchronous belt passes through the inner hole of the guide beam. It has advantages such as improved operating stability of the synchronous belt.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a cutting machine, and more particularly to a feeding mechanism for a cutting machine. Background Technology

[0002] Before leather goods are made, the leather needs to be cut into various shapes and sizes according to the design. Currently, leather is cut using a cutting machine, which has the advantages of high speed and uniform cutting. In order to further improve production efficiency, cutting machines are equipped with a feeding mechanism to automatically feed the leather. For example, the automatic feeding device for multi-layer leather materials disclosed in patent application number 201620294989.6 includes a base frame, a mounting platform, a feeding drive mechanism, and a pressing mechanism. The mounting platform is located on the base frame. The pressing mechanism includes a first pressing mechanism and a second pressing mechanism. The feeding drive mechanism, the first pressing mechanism, and the second pressing mechanism are arranged side by side on the mounting platform. Both the first pressing mechanism and the second pressing mechanism include a fixed beam and a pressing beam located on the fixed beam. Cylinders for driving the pressing beam are provided on both sides of the pressing beam. The pressing beam cooperates with the fixed beam to press the multi-layer leather material. The feeding drive mechanism includes a motor, a synchronous belt, and a roller. The motor drives the roller to rotate through the synchronous belt. The motor is fixed to the mounting platform through a motor mount. The output shaft of the motor is connected to one end of the synchronous belt through an auxiliary tensioning wheel assembly and a tensioning connector. One end of the roller is connected to the other end of the synchronous belt through a seated bearing, an active tensioning shaft, an active tensioning wheel assembly, and a deep groove ball bearing. The mounting platform is equipped with guide rails, and as can be seen from the accompanying drawings in the instruction manual, the fixed beam in the first pressing mechanism is slidably connected to the guide rails by a slider, and the timing belt is fixed to the fixed beam. During operation, the leather is passed between the fixed beam and the pressing beam of the first pressing mechanism and is clamped and fixed by the pressing beam moving downward. Then, the motor drives the timing belt to rotate, and the timing belt drives the fixed beam to move, thus pulling the leather forward.

[0003] However, the aforementioned automatic feeding device for multi-layer leather materials also has shortcomings: the synchronous belt is racetrack-shaped, and in practice, to ensure a sufficiently long conveying distance, the length of the synchronous belt is often set quite long. However, according to its instruction manual... Figure 1 As you can see, the synchronous belt is completely suspended in the air. In this case, it cannot be guaranteed that the synchronous belt will always operate stably during long-term use, which will result in the inability to guarantee the stability of feeding. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing an automatic feeding mechanism for a cutting machine, which solves the problem of poor feeding stability caused by the poor operation stability of the synchronous belt.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] An automatic feeding mechanism for a cutting machine includes a bracket, a feeding assembly disposed inside the bracket, a drive motor fixed at the rear end of the bracket, a drive pulley connected to the output shaft of the drive motor, a driven pulley disposed at the front end of the bracket, and a synchronous belt sleeved around the drive pulley and the driven pulley. A connecting seat is fixed to the upper horizontal portion of the synchronous belt, and the feeding assembly is fixed to the upper side of the connecting seat. The bracket has a guide beam arranged in a front-rear direction. The upper horizontal portion of the synchronous belt is located above the guide beam, and the connecting seat is slidably disposed on the guide beam. The guide beam is square-tube shaped, with its front end closed. A support seat is fixedly connected to the front end of the guide beam, extending above the upper surface of the guide beam. The driven pulley is rotatably disposed behind this portion of the support seat extending above the upper surface of the guide beam. A first notch is provided on the upper side of the front end of the guide beam, communicating with the inner hole of the guide beam. The bottom of the driven pulley is located within the first notch, and the bottom of the drive pulley is located behind the guide beam. The lower horizontal portion of the synchronous belt passes through the inner hole of the guide beam.

[0007] The guide beam serves a guiding function, and the connecting seat is fixed to the horizontal portion above the synchronous belt. The connecting seat is slidably mounted on the guide beam, and the feeding assembly is fixed above the connecting seat. Thus, when the drive motor drives the synchronous belt, it can move the feeding assembly to convey the leather. In particular, the connecting seat is slidably mounted on the guide beam, allowing the guide beam to support the horizontal portion above the synchronous belt. This prevents the horizontal portion from being suspended in the air during operation, significantly improving the stability of the synchronous belt's operation and consequently, the stability of the feeding process.

[0008] This automatic feeding mechanism uses a square tube-shaped guide beam, meaning it has an inner hole. The front end of the guide beam is closed, with a first notch on the upper side of the front end. A support base is fixedly connected to the front end of the guide beam, extending above the upper surface of the guide beam. The driven pulley is rotatably positioned behind this portion of the support base, allowing the driven pulley to be located above the front end of the guide beam, with its bottom at the first notch. This first notch communicates with the inner hole of the guide beam, and the bottom of the driving pulley is located behind the guide beam. Therefore, when the synchronous belt is fitted onto the driving and driven pulleys, the horizontal portion of the synchronous belt can pass directly through the inner hole of the guide beam from the rear end and exit through the first notch. This design eliminates the need for the horizontal portion of the synchronous belt to bypass the bottom of the guide beam, thus avoiding interference between the synchronous belt and the guide beam and resulting in a more compact overall structure.

[0009] In the automatic feeding mechanism of the cutting machine described above, the support base includes a vertically arranged connecting plate and two connecting blocks fixed to the rear side of the connecting plate and arranged opposite each other on the left and right sides. The driven pulley is connected between the two connecting blocks through a wheel axle.

[0010] The connecting plate allows the support base to be fixedly connected to the front end of the guide beam. The two connecting blocks fixed to the rear side of the connecting plate and arranged opposite each other in the left-right direction provide a position for the driven pulley to be installed on the rear side of the support base. The driven pulley can be connected between the two connecting blocks through the wheel axle, thereby ensuring that the bottom of the driven pulley is located in the first notch so that the horizontal part of the lower side of the synchronous belt can pass through the inner hole of the guide beam.

[0011] In the automatic feeding mechanism of the cutting machine described above, the front sides of the two connecting blocks are respectively threaded with adjusting rods. The front ends of the two adjusting rods pass through the connecting plate. The front ends of the adjusting rods are sequentially threaded with adjusting nuts and fastening nuts. The adjusting nuts abut against the front side of the connecting plate, and the fastening nuts abut against the front side of the adjusting nuts.

[0012] When the timing belt becomes loose after a long period of operation, the fastening nut can be turned forward to separate it from the adjusting nut. Then, the adjusting nut can be turned. Since the connecting block is circumferentially fixed, the adjusting rod will move forward along the thread, causing the connecting block to move forward as well, thereby tightening the timing belt.

[0013] In the automatic feeding mechanism of the cutting machine described above, a guide rail is fixed at the top of the guide beam along its length, a slider is provided on the guide rail, and a connecting seat is fixed on the slider.

[0014] With the above configuration, the connecting seat can be slidably mounted on the guide beam in the front-to-back direction, thereby using the guide beam to support the horizontal part on the upper side of the synchronous belt.

[0015] In the automatic feeding mechanism of the cutting machine described above, the bracket further includes two side plates, a crossbeam fixedly connected between the two side plates near the rear end, several support plates fixedly fixed to the top of the crossbeam along the length of the crossbeam, and a material support frame fixedly connected to the upper end of the connecting plate and the upper end of each support plate. The rear end of the guide beam is fixed to the crossbeam. The feeding assembly includes a feeding rod arranged in the left-right direction and a pressing rod arranged parallel above the feeding rod. The feeding rod is located inside the material support frame and the connecting seat is connected to the bottom of the feeding rod. The two ends of the feeding rod are respectively fixedly connected to a first mounting seat. Each of the two first mounting seats is equipped with a pressing cylinder. The two ends of the pressing rod are respectively connected to the piston rods of the two pressing cylinders.

[0016] In operation, the leather is held by a support frame and passes between the feeding rod and the pressure rod. When the leather needs to be moved, the pressure rod is moved downwards by a pressure cylinder, clamping the leather between the pressure rod and the feeding rod. Then, a drive motor drives a synchronous belt, causing the feeding rod to move forward. The pressure rod and the feeding rod are linked in the front-to-back direction, and since the leather is clamped between them, the forward movement of the feeding rod pulls the leather forward, achieving automatic leather feeding.

[0017] In particular, the connecting plate is part of the support base, which serves both to install the driven pulley and to fix the material support frame.

[0018] In the automatic feeding mechanism of the cutting machine described above, a second notch is provided on the lower side of the rear end of the guide beam, the crossbeam abuts against the second notch, and a connecting beam is fixed between the side of the guide beam and the side plate.

[0019] A second notch is provided on the lower side of the rear end of the guide beam, and the crossbeam abuts against the second notch, which makes the structure more compact in the vertical direction.

[0020] In the automatic feeding mechanism of the cutting machine described above, the material support frame includes a horizontal bar arranged parallel above the crossbeam, a lower clamping bar located in front of the horizontal bar, and several connecting rods fixedly connected between the top surface of the horizontal bar and the top surface of the lower clamping bar. The lower clamping bar is fixed to the upper end of the connecting plate, the horizontal bar is fixed to the upper end of each support plate, the feeding bar is located between the horizontal bar and the lower clamping bar and below each connecting rod, and several nylon pads are fixed along their respective length directions on the top surface of the feeding bar and the top surface of the lower clamping bar. The nylon pads on the feeding bar are spaced apart from each connecting rod in the left-right direction, and the nylon pads on the lower clamping bar are also spaced apart from each connecting rod in the left-right direction. Each nylon pad is higher than the connecting rod. An upper clamping bar is arranged parallel above the lower clamping bar. The two ends of the lower clamping bar are respectively fixedly connected to second mounting seats, and each of the two second mounting seats is equipped with a clamping cylinder. The two ends of the upper clamping bar are respectively connected to the piston rods of the two clamping cylinders.

[0021] In practice, leather is quite long, while the maximum feeding distance of the feeding assembly is only from the crossbar to the lower clamping bar. It's impossible to feed the leather completely in a single movement of the feeding assembly. Therefore, an upper clamping bar is installed parallel to the lower clamping bar. Two second mounting seats are fixedly connected to both ends of the lower clamping bar, and clamping cylinders are installed on each of the two second mounting seats. The two ends of the upper clamping bar are connected to the piston rods of the two clamping cylinders. This way, after each maximum movement of the feeding assembly, the lowering of the upper clamping bar clamps the leather, allowing the feeding assembly to return to its initial position before resuming feeding.

[0022] Specifically, the pressure bar presses the leather onto the nylon pads of the feeding bar. Then, the drive motor drives the synchronous belt, moving the feeding assembly forward to feed the leather. During this process, the upper clamping bar is raised. Once the feeding assembly reaches the lower clamping bar, the pressure bar returns to its original position, releasing the leather. Then, the clamping cylinder drives the upper clamping bar downwards, pressing the leather onto the nylon pads of the lower clamping bar. The leather is thus clamped by the upper and lower clamping bars. The drive motor then drives the synchronous belt in the opposite direction, moving the feeding assembly backwards to its initial position. During this process, the leather remains stationary because it is clamped by the upper and lower clamping bars. After the feeding assembly reaches its initial position, the drive motor stops, and the upper clamping bar moves upwards to release the leather. The feeding assembly then resumes operation, repeating the feeding process to continuously feed the leather.

[0023] It is important to note that the presence of the connecting rods prevents the leather from being directly clamped by the feeding rod and the pressure rod, or by the upper clamping rod and the lower clamping rod. Therefore, several nylon pads are fixed along their respective lengths on the top surfaces of the feeding rod and the lower clamping rod. The nylon pads on the feeding rod are spaced apart from the connecting rods in the left-right direction, and the nylon pads on the lower clamping rod are also spaced apart from the connecting rods in the left-right direction. This ensures that the leather can be clamped between the feeding rod and the pressure rod, or between the lower clamping rod and the upper clamping rod, without interference from the connecting rods.

[0024] In the automatic feeding mechanism of the above-mentioned cutting machine, a first roller is connected between the rear ends of the two side plates. The cutting machine includes a frame with a working platform. The support is fixed to the frame and the material support is connected to the rear end of the working platform. A second roller is rotatably installed at the front end of the frame. The first roller and the second roller are covered with a conveyor belt. A protective member is provided at the front end of the crossbar. The protective member is plate-shaped and has a vertical part and a horizontal part that bends backward from the upper end of the vertical part. The vertical part of the protective member is fixed to the crossbar and the vertical part of the protective member is higher than the connecting rod. The rear end of the horizontal part of the protective member is bent downward to form a scratch-resistant part.

[0025] Specifically, a conveyor belt is fitted over the first and second rollers. The material support frame and feeding frame are located inside the conveyor belt. The material support frame supports the conveyor belt to prevent it from sagging, thus ensuring that the leather can be placed flat on the conveyor belt. Since the connecting rod in the material support frame is fixedly connected to the top surface of the crossbar and the top surface of the lower clamping rod, and the connecting rod is made of metal to ensure stable support of the conveyor belt, the rear end of the connecting rod may scratch the conveyor belt during operation. Therefore, a protective component is installed at the front end of the crossbar. The protective component is plate-shaped and has a vertical part and a horizontal part that bends backward from the upper end of the vertical part. The vertical part of the protective component is fixed to the crossbar and extends above the connecting rod. The rear end of the horizontal part of the protective component bends downward at an angle to form a scratch-resistant part. This prevents the conveyor belt from directly contacting the rear end of the connecting rod to avoid scratching the conveyor belt during operation. At the same time, the downward bend at the rear end of the horizontal part of the protective component forms a scratch-resistant part, which also prevents the plate-shaped protective component itself from scratching the conveyor belt.

[0026] In the automatic feeding mechanism of the cutting machine described above, the vertical part of the protective component is provided with an adjustment hole. The adjustment hole is strip-shaped along the vertical direction. The protective component and the crossbar are fixed together by an adjustment screw that passes through the adjustment hole and is threaded into the crossbar.

[0027] By adjusting the screw and adjusting the hole, the position of the protective component can be adjusted vertically to ensure better protection of the conveyor belt and prevent it from being scratched by the connecting rod.

[0028] Compared with existing technologies, the automatic feeding mechanism of this cutting machine has the following advantages:

[0029] 1. By setting a guide beam on the bracket along the front-back direction, the horizontal part of the upper side of the synchronous belt is located above the guide beam and the connecting seat is slidably set on the guide beam. In this way, the guide beam can support the horizontal part of the upper side of the synchronous belt through the connecting seat, so that the horizontal part of the upper side of the synchronous belt will not be suspended when the synchronous belt is running, which greatly improves the stability of the synchronous belt operation and thus improves the stability of feeding.

[0030] 2. By setting the guide beam in the shape of a square tube, with the front end of the guide beam closed and a first notch on the upper side of the front end of the guide beam, and a support base fixedly connected to the front end of the guide beam, the support base is higher than the upper side of the guide beam. The driven pulley is rotatably mounted on the rear side of this part of the support base that is higher than the upper side of the guide beam. This allows the driven pulley to be located above the front end of the guide beam, with the bottom of the driven pulley located at the first notch, which is connected to the inner hole of the guide beam. The bottom of the driving pulley is located behind the guide beam. Thus, when the synchronous belt is sleeved on the outside of the driving and driven pulleys, the horizontal part of the lower side of the synchronous belt can directly pass through the inner hole of the guide beam from the rear end and then out through the first notch. With this setting, the horizontal part of the lower side of the synchronous belt does not need to go around the bottom of the guide beam, thereby avoiding interference between the synchronous belt and the guide beam and making the overall structure more compact. Attached Figure Description

[0031] Figure 1 This is a 3D schematic diagram of a cutting machine.

[0032] Figure 2 This is a 3D schematic diagram of the cutting machine after the conveyor belt has been removed.

[0033] Figure 3 This is a three-dimensional schematic diagram of the automatic feeding mechanism after removing the first roller.

[0034] Figure 4 This is a three-dimensional schematic diagram of the automatic feeding mechanism from another angle after removing the first roller.

[0035] Figure 5 This is an exploded view of the automatic feeding mechanism after removing the first roller.

[0036] Figure 6 This is a three-dimensional schematic diagram of the automatic feeding mechanism after removing the material support frame and the first roller.

[0037] Figure 7 This is a sectional view of the guide beam.

[0038] Figure 8 This is a sectional view of the support base.

[0039] Figure 9 This is a 3D schematic diagram of the feeding assembly.

[0040] Figure 10 This is a schematic diagram of a material support frame.

[0041] In the diagram, 1 is the frame; 1a is the working platform; 2 is the support; 3 is the first roller; 4 is the second roller; 5 is the conveyor belt; 6 is the feeding assembly; 7 is the drive motor; 8 is the driving pulley; 9 is the driven pulley; 10 is the synchronous belt; 11 is the guide beam; 11a is the first notch; 11b is the second notch; 12 is the connecting seat; 13 is the guide rail; 14 is the slider; 15 is the drive shaft; 16 is the support seat; 16a is the connecting plate; 16b is the connecting block; 16c is the adjusting rod; and 16d is the adjusting screw. 16e. Fastening nut; 17. Axle; 18. Side plate; 19. Crossbeam; 20. Support plate; 21. Material support frame; 22. Connecting beam; 23. Feeding rod; 24. Pressing rod; 25. First mounting seat; 26. Pressing cylinder; 27. Crossbar; 28. Lower clamping rod; 29. ​​Connecting rod; 30. Upper clamping rod; 31. Second mounting seat; 32. Clamping cylinder; 33. Nylon pad; 34. Protective component; 34a. Scratch-resistant part; 34b. Adjusting hole; 35. Adjusting screw. Detailed Implementation

[0042] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0043] like Figure 1 and Figure 2 As shown, the automatic feeding mechanism of the cutting machine includes a frame 1 with a working platform 1a. The automatic feeding mechanism includes a support 2, which is fixed to the frame 1. The front end of the support 2 is connected to the rear end of the working platform 1a. A first roller 3 is rotatably mounted at the rear end of the support 2, and the first roller 3 is positioned in a left-right direction. A second roller 4 is rotatably mounted at the front end of the frame 1, and the second roller 4 is parallel to the first roller 3. The first roller 3 and the second roller 4 are connected by a conveyor belt 5.

[0044] like Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, this automatic feeding mechanism includes a feeding assembly 6 located inside the support 2, a drive motor 7 fixed at the rear end of the support 2, a drive pulley 8 connected to the output shaft of the drive motor 7, a driven pulley 9 located at the front end of the support 2, and a synchronous belt 10 sleeved around the drive pulley 8 and the driven pulley 9. The support 2 has a guide beam 11 arranged in the front-rear direction. The synchronous belt 10 is racetrack-shaped, and a connecting seat 12 is fixed to the upper horizontal portion of the synchronous belt 10. The upper horizontal portion of the synchronous belt 10 is located above the guide beam 11, and the connecting seat 12 is slidably disposed on the guide beam 11. The feeding assembly 6 is fixed to the upper side of the connecting seat 12. Specifically, a guide rail 13 is fixed to the top of the guide beam 11 along its length direction. The guide rail 13 is located inside the synchronous belt 10, and a slider 14 is provided on the guide rail 13. The slider 14 is fixed to the lower side of the connecting seat 12. The rotating shaft of the drive motor 7 is connected to a transmission shaft 15 through a coupling, and the drive pulley 8 is fixed to the transmission shaft 15.

[0045] like Figure 6 , Figure 7 and Figure 8 As shown, the guide beam 11 is square tubular, with its front end closed. A support base 16 is fixedly connected to the front end of the guide beam 11, and the support base 16 extends above the upper side of the guide beam 11. The driven pulley 9 is rotatably disposed on the rear side of the portion of the support base 16 that extends above the upper side of the guide beam 11. A first notch 11a is provided on the upper side of the front end of the guide beam 11, and the bottom of the driven pulley 9 is located within the first notch 11a. The lower part of the driving pulley 8 is located behind the guide beam 11, and the horizontal portion of the lower side of the synchronous belt 10 passes through the inner hole of the guide beam 11. Specifically, the support base 16 includes a vertically arranged connecting plate 16a and two connecting blocks 16b located behind the connecting plate 16a and arranged opposite each other in the left-right direction. The driven pulley 9 is connected between the two connecting blocks 16b via a wheel axle 17. The front sides of the two connecting blocks 16b are respectively threaded with adjusting rods 16c. The front ends of the two adjusting rods 16c pass through the connecting plate 16a. The front ends of the adjusting rods 16c are sequentially threaded with adjusting nuts 16d and fastening nuts 16e. Adjusting nuts 16d abut against the front side of the connecting plate 16a, and fastening nuts 16e abut against the front side of adjusting nuts 16d.

[0046] like Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 9As shown, the support 2 includes two side plates 18, a crossbeam 19 fixedly connected between the two side plates 18 near their rear ends, several support plates 20 sequentially fixed to the top of the crossbeam 19 along its length, and a material support frame 21 simultaneously fixed to the upper end of the connecting plate 16a and the upper end of each support plate 20. The first roller 3 is connected between the rear ends of the two side plates 18. The rear end of the guide beam 11 is fixed to the crossbeam 19. The lower side of the rear end of the guide beam 11 is provided with a second notch 11b, and the crossbeam 19 abuts against the second notch 11b. A connecting beam 22 is fixedly connected between the side of the guide beam 11 and the side plate 18. There are two driving pulleys 8 and two driven pulleys 9. Accordingly, there are two synchronous belts 10, and two guide beams 11, two guide rails 13, and two sliders 14. The ends of the two guide beams 11 are fixed with support seats 16. The feeding assembly 6 includes a feeding rod 23 arranged in a left-right direction and a pressing rod 24 arranged parallel above the feeding rod 23. The feeding rod 23 is located inside the material support frame 21, and the connecting seat 12 is connected to the bottom of the feeding rod 23. The two ends of the feeding rod 23 are respectively fixedly connected to the first mounting seats 25, and the two first mounting seats 25 are respectively provided with pressing cylinders 26. The two ends of the pressing rod 24 are respectively connected to the piston rods of the two pressing cylinders 26. In this embodiment, the material support frame 21 includes a horizontal bar 27 arranged parallel above the crossbeam 19, a lower clamping rod 28 located in front of the horizontal bar 27, and several connecting rods 29 fixedly connected between the horizontal bar 27 and the lower clamping rod 28. The feeding rod 23 is located between the horizontal bar 27 and the lower clamping rod 28 and below each connecting rod 29. An upper clamping rod 30 is arranged parallel above the lower clamping rod 28. Second mounting seats 31 are fixedly connected to both ends of the lower clamping rod 28. Clamping cylinders 32 are respectively mounted on the two second mounting seats 31. The upper clamping rod 30 is arranged parallel above the lower clamping rod 28, and its two ends are connected to the piston rods of the two clamping cylinders 32. A feeding rod 23 is located below each connecting rod 29. Several nylon pads 33 are fixed along their respective lengths on the top surfaces of both the feeding rod 23 and the lower clamping rod 28. The nylon pads 33 on the feeding rod 23 are spaced apart from each connecting rod 29 in the left-right direction, and the nylon pads 33 on the lower clamping rod 28 are also spaced apart from each connecting rod 29 in the left-right direction. The nylon pads 33 extend above the connecting rods 29.

[0047] Furthermore, such as Figure 10As shown, a protective member 34 is provided on the rear side of the crossbar 27. The protective member 34 is plate-shaped and has a vertical part and a horizontal part that bends backward from the upper end of the vertical part. The vertical part of the protective member 34 is fixed to the crossbar 27, and the vertical part of the protective member 34 is higher than the connecting rod 29. The rear end of the horizontal part of the protective member 34 is bent downward to form a scratch-resistant part 34a. The vertical part of the protective member 34 is provided with an adjustment hole 34b, which is strip-shaped along the vertical direction. The protective member 34 and the crossbar 27 are fixed by an adjustment screw 35 that passes through the adjustment hole 34b and is threaded into the crossbar 27.

[0048] After the conveyor belt 5 is wound around the outside of the first roller 3 and the second roller 4, the material support frame 21 and the feeding rod 23 are located inside the conveyor belt 5. The conveyor belt 5 passes sequentially between the feeding rod 23 and the pressing rod 24, and between the lower clamping rod 28 and the upper clamping rod 30. Initially, the feeding rod 23 is located near the crossbar 27. The leather to be cut is placed on the rear end of the conveyor belt 5. Then, the piston rod of the pressing cylinder 26 drives the pressing rod 24 to move downwards, pressing the leather onto the conveyor belt 5. The conveyor belt 5 is then pressed against the nylon pads 33 on the feeding rod 23. Afterwards, the shaft of the drive motor 7 rotates, causing the transmission shaft 15 to rotate. This causes the drive pulley 8 fixed on the transmission shaft 15 to rotate, and the synchronous belt 10 to start running. The synchronous belt 10 then drives the feeding rod 23 forward through the connecting seat 12. Since the pressure bar 24 and the feeding bar 23 are linked in the front-to-back direction, and the leather is pressed tightly onto the conveyor belt 5 by the pressure bar 24, and the conveyor belt 5 is pressed onto the feeding bar 23 by the pressure applied to the leather by the pressure bar 24, when the feeding bar 23 moves forward, it will carry the conveyor belt 5 and the leather forward together, thus realizing automatic leather feeding. Of course, during the forward conveying of the leather, the upper clamping bar 30 is in a raised state.

[0049] After the feed rod 23 moves forward to a position close to the lower clamping rod 28, the drive motor 7 stops rotating, and the clamping cylinder 26 drives the clamping rod 24 to reset upward, releasing the leather. Next, the clamping cylinder 32 drives the upper clamping rod 30 downward, pressing the leather onto the conveyor belt 5. Similarly, the conveyor belt 5 is pressed against the nylon pads 33 of the lower clamping rod 28 by the pressure applied to the leather by the upper clamping rod 30. Then, the drive motor 7's shaft is controlled to rotate in the opposite direction, driving the feed rod 23 and the clamping rod 24 backward to the initial position via the synchronous belt 10. During the backward movement of the feed rod 23, the leather and conveyor belt 5 remain stationary due to being pressed down. After the feed rod 23 reaches the initial position, the drive motor 7 stops rotating, and the clamping cylinder 32 drives the upper clamping rod 30 to reset, releasing the leather. The feeding process is then repeated to achieve continuous leather feeding.

[0050] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An automatic feeding mechanism for a cutting machine, comprising a bracket (2), a feeding assembly (6) disposed inside the bracket (2), a drive motor (7) fixed at the rear end of the bracket (2), a drive pulley (8) connected to the output shaft of the drive motor (7), a driven pulley (9) disposed at the front end of the bracket (2), and a synchronous belt (10) sleeved around the drive pulley (8) and the driven pulley (9), wherein a connecting seat (12) is fixed to the horizontal portion above the synchronous belt (10), and the feeding assembly (6) is fixed to the upper side of the connecting seat (12), characterized in that, The bracket (2) has a guide beam (11) arranged in the front-rear direction. The horizontal part of the upper side of the synchronous belt (10) is located above the guide beam (11) and the connecting seat (12) is slidably arranged on the guide beam (11). The guide beam (11) is in the shape of a square tube. The front end of the guide beam (11) is closed. The front end of the guide beam (11) is fixedly connected to a support seat (16). The support seat (16) is higher than the upper side of the guide beam (11). The driven pulley (9) is rotatably arranged on the rear side of this part of the support seat (16) that is higher than the upper side of the guide beam (11). The upper side of the front end of the guide beam (11) is provided with a first notch (11a). The first notch (11a) communicates with the inner hole of the guide beam (11). The bottom of the driven pulley (9) is located in the first notch (11a). The bottom of the driving pulley (8) is located behind the guide beam (11). The horizontal part of the lower side of the synchronous belt (10) passes through the inner hole of the guide beam (11).

2. The automatic feeding mechanism of the cutting machine according to claim 1, characterized in that, The support base (16) includes a vertically arranged connecting plate (16a) and two connecting blocks (16b) fixed to the rear side of the connecting plate (16a) and arranged opposite to each other on the left and right sides. The driven pulley (9) is connected between the two connecting blocks (16b) through a wheel axle (17).

3. The automatic feeding mechanism of the cutting machine according to claim 2, characterized in that, The front sides of the two connecting blocks (16b) are respectively threaded with adjusting rods (16c). The front ends of the two adjusting rods (16c) pass through the connecting plate (16a). The front ends of the adjusting rods (16c) are sequentially threaded with adjusting nuts (16d) and fastening nuts (16e). The adjusting nut (16d) abuts against the front side of the connecting plate (16a), and the fastening nut (16e) abuts against the front side of the adjusting nut (16d).

4. The automatic feeding mechanism of the cutting machine according to claim 1, characterized in that, The top of the guide beam (11) is fixed with a guide rail (13) along its length direction, and a slider (14) is provided on the guide rail (13). The connecting seat (12) is fixed on the slider (14).

5. The automatic feeding mechanism of the cutting machine according to claim 1, 2, 3, or 4, characterized in that, The bracket (2) further includes two side plates (18), a crossbeam (19) fixedly connected between the two side plates (18) near the rear end, several support plates (20) fixedly fixed to the top of the crossbeam (19) along the length of the crossbeam (19), and a material support frame (21) fixedly connected to the upper end of the connecting plate (16a) and the upper end of each support plate (20). The rear end of the guide beam (11) is fixed to the crossbeam (19). The feeding assembly (6) includes a left-right direction... The feeding rod (23) is set up and the pressing rod (24) is set parallel to the feeding rod (23). The feeding rod (23) is located inside the material support frame (21) and the connecting seat (12) is connected to the bottom of the feeding rod (23). The two ends of the feeding rod (23) are respectively fixedly connected to the first mounting seat (25). The two first mounting seats (25) are respectively equipped with pressing cylinders (26). The two ends of the pressing rod (24) are respectively connected to the piston rods of the two pressing cylinders (26).

6. The automatic feeding mechanism of the cutting machine according to claim 5, characterized in that, The guide beam (11) has a second notch (11b) on the lower side of its rear end, and the crossbeam (19) abuts against the second notch (11b). A connecting beam (22) is fixed between the side of the guide beam (11) and the side plate (18).

7. The automatic feeding mechanism of the cutting machine according to claim 5, characterized in that, The material support frame (21) includes a crossbar (27) parallel to the crossbeam (19), a lower clamping rod (28) located in front of the crossbar (27), and several connecting rods (29) fixedly connected between the top surface of the crossbar (27) and the top surface of the lower clamping rod (28). The lower clamping rod (28) is fixed to the upper end of the connecting plate (16a), the crossbar (27) is fixed to the upper end of each support plate (20), and the feeding rod (23) is located between the crossbar (27) and the lower clamping rod (28) and below each connecting rod (29). Several nylon wires are fixed along their respective length directions on the top surface of the feeding rod (23) and the top surface of the lower clamping rod (28). The pads (33) are arranged on the feeding rod (23) and the connecting rods (29) at intervals in the left and right direction. The nylon pads (33) on the lower clamping rod (28) are also arranged at intervals in the left and right direction. The nylon pads (33) are higher than the connecting rods (29). The upper clamping rod (30) is arranged parallel above the lower clamping rod (28). The two ends of the lower clamping rod (28) are respectively fixedly connected to the second mounting base (31). The two second mounting bases (31) are respectively equipped with clamping cylinders (32). The two ends of the upper clamping rod (30) are respectively connected to the piston rods of the two clamping cylinders (32).

8. The automatic feeding mechanism of the cutting machine according to claim 7, characterized in that, The rear ends of the two side plates (18) are connected by a first roller (3). The cutting machine includes a frame (1) with a working platform (1a). The support (2) is fixed to the frame (1) and the material support frame (21) is connected to the rear end of the working platform (1a). A second roller (4) is rotatably provided at the front end of the frame (1). The first roller (3) and the second roller (4) are covered with a conveyor belt (5). The front end of the crossbar (27) is provided with a protective member (34). The protective member (34) is plate-shaped. The protective member (34) has a vertical part and a horizontal part that bends backward from the upper end of the vertical part. The vertical part of the protective member (34) is fixed to the crossbar (27) and the vertical part of the protective member (34) is higher than the connecting rod (29). The rear end of the horizontal part of the protective member (34) bends downward to form a scratch-resistant part (34a).

9. The automatic feeding mechanism of the cutting machine according to claim 8, characterized in that, The vertical part of the protective component (34) is provided with an adjustment hole (34b). The adjustment hole (34b) is strip-shaped along the vertical direction. The protective component (34) and the crossbar (27) are fixed together by an adjustment screw (35) that passes through the adjustment hole (34b) and is threaded into the crossbar (27).

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