An automatic shredder and a drag-and-cut mechanism

Abstract

This invention provides an automatic shredder and a drag-and-cut mechanism, including a bracket, on which a cutter is slidably connected. The cutter is driven by a power mechanism and moves reciprocally. A timing belt is rotatably connected to one side of the bracket, and a gripper assembly for holding wire harnesses is slidably connected to the other side of the bracket. A drive mechanism is provided on the bracket to drive the gripper assembly to move along the length direction of the timing belt, so as to improve safety and production efficiency.

Description

Technical Field

[0001] This invention relates to the field of mechanical equipment, and in particular to an automatic shredder and a drag-and-cut mechanism. Background Technology

[0002] Wire harness processing is a common process in industrial production. As the main processing equipment, the degree of automation of the cutting machine directly affects production efficiency and operational safety.

[0003] In the prior art, Chinese Patent Publication No. CN207386709U discloses a cutting machine. This device mainly includes a base, a conveyor frame, a sawing table, and an electric saw blade. The sawing table is located at the output end of the conveyor frame, and the electric saw blade is mounted on the sawing table. Two drive rollers are mounted on the base, and an annular track forming the conveyor frame is wound around the drive rollers. To achieve feeding, a telescopic cylinder is installed on the sawing table. The telescopic rod of the cylinder is connected to a drive rod, and the end of the drive rod has a hook. The hook engages with a groove in the track, thereby driving the track to rotate in a step-by-step manner, conveying the wire bundle placed on the track towards the sawing table, where it is cut by the electric saw blade.

[0004] This device primarily relies on a stepping mechanism using a track and hook for conveying. When the wire harness is long, this structure can meet basic conveying and cutting requirements. However, as the cutting process progresses, when the wire harness length shortens, especially when the tail end needs to be cut, the remaining short wire harness often cannot be stably and accurately conveyed to the underside of the saw blade due to structural gaps between the track conveyor and the saw blade, or insufficient weight of the short wire harness leading to reduced friction with the track. In this situation, to complete the remaining processing, the operator must manually hand-hold or drag the end of the wire harness into the working area of ​​the electric saw blade. This operation not only severely restricts the continuity of production efficiency, but more importantly, the proximity of the operator's hand to the high-speed rotating saw blade poses a significant safety hazard and can easily lead to workplace injuries. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide an automatic shredder and a drag-and-cut mechanism to reduce safety hazards and improve production efficiency.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is: a material cutting mechanism, including a bracket, a cutter slidably connected on the bracket, the cutter being driven by a power mechanism and reciprocating, a timing belt being rotatably connected to one side of the bracket, and a gripper assembly for clamping wire harnesses being slidably connected to the other side of the bracket, and a drive mechanism for driving the gripper assembly to move along the length direction of the timing belt is provided on the bracket.

[0007] To achieve the above technical solution, during operation, the drive mechanism moves the gripper assembly along the length of the synchronous belt, allowing the gripper assembly to actively approach and firmly clamp the wire harness to be processed. Subsequently, the drive mechanism drives the gripper assembly with the wire harness in its gripper assembly to drag and convey it towards the cutter, accurately delivering the wire harness to the predetermined position. Finally, the power mechanism drives the cutter to reciprocate to complete the cutting operation. This changes the traditional method of conveying by belt friction, adopting an active conveying mode of "clamping + dragging," effectively solving the problem in existing technologies where insufficient friction prevents conveying when the wire harness is too short or is a tail piece. At the same time, this mechanism can bridge the gap between the conveyor end and the cutter, achieving accurate feeding of short materials without manual assistance, greatly improving processing efficiency and eliminating safety hazards for operators.

[0008] In a preferred embodiment of the present invention, the gripper assembly includes a driving member, a sliding base, and at least two grippers. The driving member is connected to the sliding base, and the sliding base is connected to a driving mechanism. The driving member drives the two grippers to move through a connecting body. The grippers are hinged to the connecting body. The sliding base has a sliding groove. Sliding members that slide on the sliding groove are connected to the grippers. The sliding groove includes a clamping area and a separating area that are interconnected. During the process of the sliding members moving from the separating area to the clamping area, the distance between two adjacent sliding members increases, and the clamping ends of the two grippers move closer to each other.

[0009] When the clamp moves toward the wire harness, the inner wall of the clamp abuts against the upper edge of the wire harness, and the sliding member moves from the separation area to the clamping area, causing the two clamps to clamp the wire harness.

[0010] To achieve the above technical solution, during the clamping process, the driving component drives the two clamping bodies to move synchronously through the connecting body. As the clamping bodies move forward, the sliding components on them slide from the separation area to the clamping area within the sliding groove of the sliding seat. Due to the guiding effect of the sliding groove, the change in the position of the sliding components forces the two clamping bodies to produce relative displacement, causing the clamping ends of the clamping bodies to move closer together and eventually close. By utilizing the specific trajectory of the sliding groove and the cooperation of the sliding components, the linear thrust of the driving component is converted into the clamping action of the clamping bodies. This structural design cleverly achieves the linkage between the "forward contact" and "closed clamping" of the clamping bodies, and the mechanical limiting of the sliding groove ensures the stability of the clamping state and prevents the wire harness from falling off during dragging.

[0011] As a preferred embodiment of the present invention, a positioning groove is provided on the side wall of the clamping end of the clamp body, and the inner wall of the positioning groove is used to abut against the outer wall of the wire harness.

[0012] To achieve the above technical solution, when the clamping body grips the wire harness, the outer wall of the wire harness is accommodated within a positioning groove on the side wall of the clamping end, and the inner wall of the positioning groove is tightly fitted and pressed against the surface of the wire harness. This positioning groove achieves a wrap-around clamping of the wire harness, increasing the contact area between the clamp and the wire harness, and utilizing shape-fitting to create mechanical limits. This not only effectively prevents radial rotation or axial slippage of the round wire harness during clamping, but also further improves the accuracy of the wire harness feed length.

[0013] As a preferred embodiment of the present invention, a positioning plate is connected to the sliding seat, and a limiting area is formed on the positioning plate, with the two clamps located in the limiting area.

[0014] To achieve the above technical solution, a limiting zone is created on the positioning plate on the sliding seat, restricting the movement of the two clamping bodies within this area. This limiting zone physically constrains the range of motion of the clamping bodies, preventing excessive swaying or dislocation during high-speed opening and closing or under stress, thus ensuring the compactness of the overall structure of the gripper assembly and the reliability of its motion trajectory.

[0015] As a preferred embodiment of the present invention, a limiting member for abutting against the outer wall of the clamp is fixedly connected to the inner wall of the limiting area, and the limiting member is located between two adjacent clamps.

[0016] To achieve the above technical solution, the limiting component located between two adjacent clamping bodies abuts against the outer wall of the clamping body, thus limiting the movement of the clamping bodies. This ensures that the two clamping bodies can open and close symmetrically and smoothly relative to the center, avoiding jamming caused by uneven force on one side and improving the smoothness of the mechanism's operation.

[0017] In a preferred embodiment of the present invention, the connecting body includes a fixing block and a support block. The fixing block is fixed to the piston shaft of the driving member. One side of the support block is fixedly connected to the fixing block, and the other side of the support block is hinged to the clamping body through a pin. A protrusion is connected to the support block, and a first arc surface is formed on the protrusion. A second arc surface that fits against the first arc surface is formed on the outer wall of the clamping body. The pin, the first arc surface, and the second arc surface are coaxially arranged.

[0018] To achieve the above technical solution, the connecting body is connected to the drive shaft via a fixed block, and the support block is hinged to the clamping body via a pin. At the hinge, the first arc surface of the protrusion and the second arc surface of the outer wall of the clamping body are closely fitted and coaxially arranged. This design, employing an arc surface fit-assisted pin hinge, ensures that during heavy clamping, the clamping reaction force is primarily borne by the large-area fitting arc surface, rather than solely by the pin. This significantly reduces the shear stress on the pin, improves the structural strength and wear resistance of the connection node, and extends the service life of the gripper assembly under frequent reciprocating impacts.

[0019] In a preferred embodiment of the present invention, the sliding member is slidably connected to the sliding groove via a connecting wheel, and the sliding member is fixed to the clamp.

[0020] To achieve the above technical solution, the sliding component uses a connecting wheel to roll and slide in the sliding groove, moving with the movement of the clamp. This converts the sliding friction between the sliding component and the sliding groove into rolling friction, significantly reducing the frictional resistance during mechanism operation. This makes the opening and closing of the clamp smoother and more sensitive, while also reducing the load power consumption of the drive components.

[0021] In a preferred embodiment of the present invention, the driving mechanism includes a driving motor, a driving screw, and a driving slide. The driving motor is fixed on the bracket and drives the driving screw to rotate. The driving slide is fixed on the sliding seat and slidably connected to the bracket. The driving slide is threadedly connected to the driving screw. The length direction of the driving screw is parallel to the length direction of the synchronous belt.

[0022] To achieve the above technical solution, the drive motor starts and drives the drive screw to rotate. Utilizing the principle of threaded transmission, the drive slide, which is threadedly connected to the screw, drives the sliding seat to perform linear reciprocating motion along the bracket. The screw-nut transmission mechanism features high transmission accuracy and smooth operation. It can precisely control the moving distance and speed of the gripper assembly, meeting the needs of precision machining.

[0023] In a preferred embodiment of the present invention, the power mechanism includes a power motor, a cam, a transmission rod, a slide rail, a slider, and a cross plate. The power motor is fixed on the bracket and drives the cam to rotate. One end of the transmission rod is hinged to the cam, and the other end of the transmission rod is hinged to the cross plate. The slider is fixed on the bracket, the slide rail is slidably connected to the slider, the cross plate is fixed on the slide rail, and the slide rail is connected to the cutter.

[0024] To achieve the above technical solution, a power motor drives a cam to rotate, which in turn drives a cross plate and slide rail to reciprocate up and down on a slider via a transmission rod. This, in turn, drives a cutter connected to the slide rail to cut the wire harness. A cam-linkage mechanism converts the motor's rotational motion into the cutter's reciprocating linear motion. This mechanism is simple and durable, and its cam profile design allows for ideal cutting speed and force characteristics, ensuring that the cutter has sufficient impact and cutting force upon contact with the wire harness.

[0025] The present invention also provides an automatic shredder, the technical solution of which is as follows: an automatic shredder includes a base and a material cutting mechanism as described above. The base is fixedly connected to a support. A connecting plate is connected to the base. The connecting plate is located between a timing belt and a cutter. The upper surface of the connecting plate is flush with the upper surface of the timing belt. A fixed seat is fixed on the timing belt. A switch and a clamping assembly for clamping wire harnesses are provided on the fixed seat. A slide rod is slidably connected to the switch. A contact plate is fixed on the slide rod. A feeding plate and a waste cylinder are slidably connected to the support. The feeding plate corresponds to the cutter or the waste cylinder corresponds to the cutter. Both the feeding plate and the waste cylinder are located on the side of the support away from the timing belt.

[0026] To achieve the above technical solution, the automatic wire harness cutter integrates the aforementioned drag-and-cut mechanism. During operation, the wire harness is conveyed by a synchronous belt and transitions through a connecting plate, then precisely dragged by the drag-and-cut mechanism to the cutter for cutting. After cutting, the unloading plate and waste bin below the support correspond to the cutter position according to control commands, separating and collecting the finished product and waste. This constructs a complete automated wire harness processing system. The design of the connecting plate ensures a smooth transition of the wire harness from the conveying end to the cutting end, avoiding material jamming; the cooperation between the unloading plate and the waste bin enables automatic sorting of finished products and waste. The entire machine achieves full automation from loading, conveying, dragging, cutting to unloading, greatly improving production efficiency and reducing labor costs. The wire harness is precisely dragged by the drag-and-cut mechanism to the cutter for cutting, and the resulting waste falls onto the connecting plate. The reciprocating movement of the slide bar causes the contact plate to push the waste from the connecting plate into the waste bin. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of Example 1;

[0028] Figure 2 This is a schematic diagram of the structure of Example 1;

[0029] Figure 3 To illustrate the structural diagram of the power mechanism;

[0030] Figure 4 To illustrate the structural diagram of the cam;

[0031] Figure 5 An exploded view of the gripper assembly;

[0032] Figure 6 An exploded view of the gripper assembly;

[0033] Figure 7 To illustrate the structural diagram of the clamp;

[0034] Figure 8 This is a schematic diagram of the structure of Example 2;

[0035] Figure 9 This is a schematic diagram of the structure of Example 2;

[0036] Figure 10 This is a schematic diagram of the exploded structure of the clamping component;

[0037] Figure 11 This is a schematic diagram of the exploded structure of the clamping component;

[0038] Figure 12 This is a schematic diagram showing the location of the connecting plate;

[0039] Figure 13 A schematic diagram illustrating the explosive structure of the elastic force;

[0040] Figure 14 This is a schematic diagram illustrating the structure of the connecting plate.

[0041] Reference numerals: 1. Bracket; 2. Cutter; 3. Power mechanism; 4. Motor; 5. Cam; 6. Transmission rod; 7. Slide rail; 8. Slider; 9. Horizontal plate; 10. Support rod; 11. Slide plate; 12. Pressure plate; 13. Synchronous belt; 14. Gripper assembly; 15. Drive component; 16. Sliding seat; 17. Clamping body; 18. Protrusion; 19. First arc surface; 20. Second arc surface; 21. Sliding groove; 22. Clamping area; 23. Separation area; 24. Sliding component; 25. Connecting wheel; 26. Positioning groove; 27. Positioning plate; 28. Limiting area; 29. ​​Limiting component; 30. Drive mechanism; 31. Drive motor; 32. Drive screw; 33. Drive slide; 34. Base; 35. Connecting plate; 36. Contact surface; 37. Elastic structure; 38. Elastic component 39. Connecting rod; 40. Contact element; 41. Adjusting structure; 42. Fixing element; 43. Adjusting element; 44. Guide slope; 45. Fixing seat; 46. Switch; 47. Slide rod; 48. Contact plate; 49. Controller; 50. Clamping assembly; 51. Power component; 52. Support seat; 53. Claw body; 54. Connecting element; 55. Fixing plate; 56. L-shaped plate; 57. Guide groove; 58. Clamping section; 59. Separation section; 60. Guide element; 61. Rotary wheel; 62. Clamping groove; 63. Limiting plate; 64. Limiting groove; 65. Limiting block; 66. Guide block; 67. Guide arc surface; 68. Placement arc surface; 69. Feed plate; 70. Waste cylinder; 71. Screw; 72. Cross frame; 73. Connecting body; 74. Fixing block; 75. Support block. Detailed Implementation

[0042] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and mastered.

[0043] Example 1: A material cutting mechanism includes a support frame, on which a cutter is slidably connected along its height. The cutter is driven and reciprocates by a power mechanism. The power mechanism includes a motor, a cam, a transmission rod, a slide rail, a slider, and a cross plate. The motor is fixed to the support frame and drives the cam to rotate. The motor is a servo motor and is horizontally positioned.

[0044] The lower end of the transmission rod is hinged to the protruding part of the cam, and the upper end of the transmission rod is hinged to the middle of the horizontal plate, which is placed horizontally. The sliders are fixed to the bracket, and multiple sliders are arranged along the height direction. Two slide rails are slidably connected to the sliders, and both ends of the horizontal plate are fixedly connected to the two slide rails respectively.

[0045] A crossbar is fixedly connected to the upper end of the slide rail, and a support rod is hinged to the crossbar. The lower end of the support rod is hinged to the cutter. The support rod is vertically positioned. A vertically positioned slide plate is fixedly connected to the bracket, and a groove is formed on the side wall of the slide plate, in which the side wall of the cutter is slidably connected.

[0046] A vertical plate is fixedly connected to the bracket, and a vertically mounted cylinder is fixedly connected to the vertical plate. A pressure plate is fixed to the piston rod of the cylinder. The pressure plate is close to the cutter.

[0047] After the pressure plate is pressed against the outer wall of the wire harness, the cutter moves down to cut the wire harness. After cutting, the cutter moves up to reset, and then the pressure plate resets.

[0048] A timing belt is rotatably connected to one side of the bracket, and a clamping jaw assembly for holding the wire harness is slidably connected to the other side of the bracket. The timing belt, pressure plate, cutter, and clamping jaw assembly are arranged sequentially from left to right. The timing belt is horizontally positioned.

[0049] The gripper assembly includes a drive unit, a sliding base, and at least two grippers. The drive unit is a cylinder and is fixedly connected to the sliding base, and is vertically positioned. The drive unit drives the two grippers to move via a connecting body. The middle of each gripper is hinged to the connecting body. The connecting body includes a fixed block and a support block. The fixed block is fixed to the piston shaft of the drive unit, one side of the support block is integrally connected to the fixed block, and the other side of the support block is hinged to the two grippers via a pin. The two grippers are positioned opposite each other.

[0050] A protrusion is integrally connected to the support block. A first arc surface is formed on the side wall of the protrusion, and a second arc surface that fits against the first arc surface is formed on the outer wall of the clamp. The pin, the first arc surface, and the second arc surface are coaxially arranged.

[0051] Two sliding grooves are formed on the sliding base, arranged in a V-shape. Each sliding groove includes a clamping area and a disengaging area that are interconnected. A sliding component that slides on the sliding groove is connected to the upper end of the clamping body. The sliding component is slidably connected to the sliding groove via a connecting wheel and is fixed to the clamping body.

[0052] As the sliding component moves from the separation zone to the clamping zone, the distance between two adjacent sliding components increases, while the clamping ends of the two clamps move closer to each other.

[0053] As the clamp moves toward the wire harness, the inner wall of the clamp presses against the upper edge of the wire harness, and the sliding member moves from the separation area to the clamping area, causing the two clamps to clamp the wire harness.

[0054] A positioning groove is provided on the side wall of the clamping end of the clamp body, and the inner wall of the positioning groove is used to abut against the outer wall of the wire harness.

[0055] A positioning plate is fixedly connected to the side of the sliding seat facing away from the drive component. A limit zone is opened on the positioning plate, and the two clamps are located in the limit zone.

[0056] A limiting member is fixedly connected to the inner wall of the limiting area for abutting against the outer wall of the clamp, and the limiting member is located between the two clamps.

[0057] A drive mechanism is mounted on the bracket to move the gripper assembly along the length of the timing belt. This drive mechanism includes a drive motor, a drive screw, and a drive slide. The drive motor is a servo motor and is horizontally positioned. The drive motor is fixed to the bracket, and its shaft is fixedly connected to the drive screw via a coupling. The drive screw is also horizontally positioned.

[0058] The drive slide is fixed to the sliding seat and slidably connected to the bracket. The drive slide is threadedly connected to the drive screw, and the length direction of the drive screw is parallel to the length direction of the timing belt.

[0059] Example 2: An automatic shredder includes a base and a material-dragging and cutting mechanism as described in Example 1. The base is fixedly connected to a support, and the base is located on the side of the support away from the gripper assembly.

[0060] A connecting plate is attached to the base, positioned between the timing belt and the pressure plate, with its upper surface flush with the upper surface of the timing belt. The timing belt is tensioned by a support wheel, which is driven to rotate by a servo motor.

[0061] The connecting plate is hinged to the base by a pin. An arc-shaped contact surface is provided on the connecting plate, and the base has a spring structure that drives the connecting plate to move closer to the timing belt. When the contact surface is in close contact with the bend of the timing belt, the upper surface of the connecting plate is flush with the upper surface of the timing belt.

[0062] The elastic structure includes an elastic element, connecting rods, and contact elements. Connecting holes are provided on the connecting plate, with two holes located near the two side edges of the connecting plate. The width of the connecting plate is greater than the width of the conveyor belt body. The connecting rods pass through the connecting holes, with two connecting rods located on either side of the synchronous belt. The outer diameter of the connecting rods is smaller than the inner diameter of the connecting holes.

[0063] The contact element is fixedly connected to the end of the connecting rod and is used to abut against the upper surface of the connecting plate.

[0064] A crossbar is fixedly connected to the lower end of the connecting rod, with two connecting rods located at opposite ends of the crossbar. The upper end of the elastic element is connected to the middle of the crossbar. The elastic element is a tension spring.

[0065] A limiting ring groove is made in the middle of the crossbar, and the upper end of the elastic element is hung and embedded in the limiting ring groove.

[0066] An adjustment structure for adjusting the deformation of the elastic element is provided on the base. The adjustment structure is located directly below the limiting ring groove.

[0067] The adjustment structure includes a fixing component and an adjusting component. The fixing component is fixed to the base, and the adjusting component passes through the fixing component and is threadedly connected to an adjusting sleeve, which is a nut. The adjusting sleeve abuts against the lower surface of the fixing component. A hanging hole is provided at the upper end of the adjusting component, and the lower end of the elastic element is fixed in the hanging hole.

[0068] A locking sleeve is threaded onto the adjusting component, which is used to abut against the upper surface of the fixing component.

[0069] The upper surface of the connecting plate is provided with a guide slope, which is located at the end of the connecting plate near the synchronous belt.

[0070] A mounting base is fixed to the synchronous belt. The mounting base is equipped with a switch and a clamping assembly for holding the wire harness. A slide rod is slidably connected to the switch, and a contact plate is fixed to the end of the slide rod. This switch is a limit switch. The switch is configured to be triggered when the contact plate is abutted by the wire harness, causing the slide rod to move. The controller is configured to receive the trigger signal from the switch and control the power component to drive the claw to clamp the wire harness. This controller is a PLC controller. In this embodiment, a limit switch is used.

[0071] The clamping assembly includes a power unit, a support base, and two gripper bodies. The power unit, which is connected to the support base, is a cylinder. The power unit drives the two gripper bodies to move synchronously via a connecting member.

[0072] The connector includes a fixed plate and an L-shaped plate. The fixed plate is fixed to the power shaft of the power unit. One side of the L-shaped plate is fixedly connected to the fixed plate, and the other side of the L-shaped plate is hinged to the claw body via a pin. The L-shaped plate is located below the fixed plate. The middle part of the claw body is hinged to the connector.

[0073] Two guide slots arranged symmetrically in a V-shape are provided on the side of the support base opposite to the power component. Each guide slot includes a clamping section and a separating section that are interconnected. The separating section is located above the clamping section. The clamping section and the separating section have a smooth transition.

[0074] A guide is fixedly connected to the upper end of the claw body, and a rotating wheel is sleeved on the guide and rotatably connected. The rotating wheel is slidably connected in the guide groove.

[0075] A clamping groove is formed on the side wall of the claw body, and two clamping grooves are arranged opposite each other and located at the clamping end of the claw body. The inner wall of the clamping groove is used to abut against the outer wall of the wire harness.

[0076] A limiting plate is fixedly connected to the side of the support base facing away from the power component. A limiting groove is opened on the side of the limiting plate facing the support base, and both claws are located in the limiting groove.

[0077] A limiting block is fixedly connected to the inner wall of the limiting groove to abut against the outer wall of the claw body. The limiting block is located between two adjacent claw bodies. When the L-shaped plate moves upward, the guide moves into the separation section and abuts against the outer wall of the claw body through the limiting block to limit the displacement stroke of the claw body.

[0078] A guide block is fixedly connected to the L-shaped plate, and a guide arc surface is formed on the guide block. A placement arc surface is formed on the outer wall of the claw body, and the guide arc surface fits into the placement arc surface. The pin, guide arc surface, and placement arc surface are coaxially arranged.

[0079] When the power unit is activated, the power shaft drives the L-shaped plate downwards via the fixed plate, causing the two claws to move downwards synchronously with the L-shaped plate. During the downward movement, the claws move closer to the wire harness, with the upper edge of the clamping groove first abutting against the upper edge of the wire harness, applying downward pressure to the wire harness. Simultaneously, the guides move from the upper separating section to the lower clamping section within the guide grooves, gradually increasing the distance between the two guides. This forces the claws to rotate around the central pin, causing the clamping grooves at the lower ends of the two claws to close inwards, clamping the wire harness.

[0080] A feed plate and a waste cylinder are slidably connected to a support frame. The feed plate and waste cylinder are rotatably connected to screws on the support frame; one screw is horizontally positioned, and the other is inclined. One screw is threadedly connected to the feed plate, and the other is threadedly connected to the waste cylinder. The two screws are driven to rotate by two servo motors. The feed plate corresponds to the cutter, or the waste cylinder corresponds to the cutter. Both the feed plate and the waste cylinder are located on the side of the support frame furthest from the timing belt.

[0081] Of course, the above are just typical examples of the present invention. In addition, the present invention may have many other specific embodiments. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. A material cutting mechanism, comprising a support (1), characterized in that: A cutter (2) is slidably connected to the bracket (1). The cutter (2) is driven and reciprocates by a power mechanism (3). A timing belt (13) is rotatably connected to one side of the bracket (1). A clamping jaw assembly (14) for clamping wire harnesses is slidably connected to the other side of the bracket (1). A drive mechanism (30) is provided on the bracket (1) for driving the clamping jaw assembly (14) to move along the length direction of the timing belt (13). The clamping jaw assembly (14) includes a drive member (15), a sliding seat (16), and at least two clamping bodies (17). The drive member (15) is connected to the sliding seat (16). Connected to the drive mechanism (30), the drive member (15) drives the two clamps (17) to move through the connecting body (73). The clamps (17) are hinged to the connecting body (73). The sliding seat (16) has a sliding groove (21). The clamps (17) are connected to a sliding member (24) that slides on the sliding groove (21). The sliding groove (21) includes a clamping area (22) and a separating area (23) that are interconnected. During the process of the sliding member (24) moving from the separating area (23) to the clamping area (22), the distance between two adjacent sliding members (24) increases, and the clamping ends of the two clamps (17) move closer to each other. When the clamp (17) moves toward the wire harness, the inner wall of the clamp (17) abuts against the upper edge of the wire harness, and the sliding member (24) moves from the separation area (23) to the clamping area (22), and the two clamps (17) clamp the wire harness.

2. The material cutting mechanism according to claim 1, characterized in that: The clamping end of the clamp (17) is provided with a positioning groove (26) on its side wall, and the inner wall of the positioning groove (26) is used to abut against the outer wall of the wire harness.

3. The material cutting mechanism according to claim 1, characterized in that: The sliding seat (16) is connected to a positioning plate (27), and a limiting area (28) is opened on the positioning plate (27). The two clamps (17) are located in the limiting area (28).

4. The material cutting mechanism according to claim 3, characterized in that: The inner wall of the limiting area (28) is fixedly connected with a limiting member (29) for abutting against the outer wall of the clamp (17), and the limiting member (29) is located between two adjacent clamps (17).

5. A material cutting mechanism according to claim 1, characterized in that: The connecting body (73) includes a fixing block (74) and a support block (75). The fixing block (74) is fixed to the piston shaft of the driving member (15). One side of the support block (75) is fixedly connected to the fixing block (74), and the other side of the support block (75) is hinged to the clamping body (17) through a pin. A protrusion (18) is connected to the support block (75). A first arc surface (19) is provided on the protrusion (18). A second arc surface (20) that fits against the first arc surface (19) is provided on the outer wall of the clamping body (17). The pin, the first arc surface (19), and the second arc surface (20) are coaxially arranged.

6. A material cutting mechanism according to claim 1, characterized in that: The sliding member (24) is slidably connected to the sliding groove (21) via the connecting wheel (25), and the sliding member (24) is fixed on the clamp (17).

7. A material cutting mechanism according to claim 1, characterized in that: The drive mechanism (30) includes a drive motor (31), a drive screw (32), and a drive slide (33). The drive motor (31) is fixed on the bracket (1) and drives the drive screw (32) to rotate. The drive slide (33) is fixed on the sliding seat (16) and slidably connected to the bracket (1). The drive slide (33) is threadedly connected to the drive screw (32). The length direction of the drive screw (32) is parallel to the length direction of the synchronous belt (13).

8. A material cutting mechanism according to claim 1, characterized in that: The power mechanism (3) includes a power motor (4), a cam (5), a transmission rod (6), a slide rail (7), a slider (8), and a cross plate (9). The power motor (4) is fixed on the bracket (1) and drives the cam (5) to rotate. One end of the transmission rod (6) is hinged to the cam (5), and the other end of the transmission rod (6) is hinged to the cross plate (9). The slider (8) is fixed on the bracket (1), the slide rail (7) is slidably connected to the slider (8), and the cross plate (9) is fixed on the slide rail (7). The slide rail (7) is connected to the cutter (2).

9. An automatic shredder, comprising a base (34), characterized in that: It also includes a material cutting mechanism as described in any one of claims 1-8, wherein the base (34) is fixedly connected to the bracket (1), a connecting plate (35) is connected to the base (34), the connecting plate (35) is located between the timing belt (13) and the cutter (2), the upper surface of the connecting plate (35) is flush with the upper surface of the timing belt (13), a fixing seat (45) is fixed on the timing belt (13), and a switch (46) is provided on the fixing seat (45). The switch (46) and the clamping assembly (50) for clamping the wire harness are slidably connected to the switch (46), and the contact plate (48) is fixed on the slide rod (47). The bracket (1) is slidably connected to the feed plate (69) and the waste cylinder (70). The feed plate (69) corresponds to the cutter (2) or the waste cylinder (70) corresponds to the cutter (2). The feed plate (69) and the waste cylinder (70) are both located on the side of the bracket (1) away from the synchronous belt (13).

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