A concave plate screen wire threading device

Abstract

This utility model discloses a wire threading device for a concave sieve. The wire threading device includes a positioner, a wire pushing assembly, a wire threading system, and a clamp. The positioner is used to rotate the clamp, the clamp is used to hold or fix the concave sieve frame, the wire pushing assembly is used to push the steel wire, and the wire threading system is used to identify and guide the steel wire to pass smoothly through the horizontal plate on the concave sieve, eliminating the steel wire from getting stuck on the horizontal plate of the concave sieve frame, and finally realizing that all steel wires are threaded into the concave sieve. Compared with the existing manual wire threading, this utility model, including the positioner, the wire pushing assembly, the clamp, and the wire threading system, can realize the synchronous and automated threading of all steel wires, and improve the threading efficiency by more than 10 times.

Description

Technical Field

[0001] This utility model belongs to the field of concave plate screen production technology, and specifically relates to a wire threading device for a concave plate screen. Background Technology

[0002] As a core component of the rice harvester's threshing system, the concave sieve requires a grid structure with multiple steel wires running through it to form a precision separation mesh. Figure 1 The image shows a concave sieve, which is curved overall with several horizontal plates in the middle. Several steel wires pass through these horizontal plates sequentially from the bottom plate of the sieve. In traditional manufacturing, due to the small gap between the sieve frame and the steel wires, welding after wire threading is inconvenient. It is necessary to first weld the longitudinal / transverse plates into an arc-shaped frame and then manually thread the wires. However, due to the influence of welding thermal stress on the thin-walled steel plates (<5mm), uncontrollable deformation occurs, resulting in hole group misalignment. Moreover, the single-sided gap between the steel wire and the holes on the horizontal plates is <0.5mm, making it impossible to smoothly thread multiple steel wires through multiple horizontal plates, resulting in low production efficiency. To address this common problem in the industry, there is an urgent need to develop an automated concave sieve wire threading device to solve the wire threading obstruction problem caused by post-weld deformation and achieve efficient wire threading for the concave sieve. Summary of the Invention

[0003] The purpose of this invention is to propose a wire threading device for a concave sieve, which changes the existing manual wire threading method and enables all steel wires of the concave sieve to be threaded simultaneously.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A wire threading device for a concave sieve includes a positioner, a wire pushing assembly, a wire threading system, and a clamp. The positioner is used to rotate the clamp, the clamp is used to hold or fix the concave sieve frame, the wire pushing assembly is used to push the wire, and the wire threading system is used to identify and guide the wire to pass smoothly through the horizontal plate on the concave sieve, eliminating the wire from getting stuck on the horizontal plate of the concave sieve frame, and ultimately achieving that all the wires are threaded into the concave sieve.

[0006] Furthermore, the middle part of the positioner is equipped with a clamp and a wire threading system, a concave plate screen frame is installed inside the clamp, and a wire pusher assembly is installed on the wire threading side of the clamp.

[0007] Furthermore, the fixture includes a frame formed by two side plates, an upper plate, and a lower plate. The two side plates are mounted on the rotating shaft of the positioner through side plate shaft holes. The concave plate screen frame is placed inside the fixture and fixed by one or more of the following methods: positioning block, clamping device, and positioning pin.

[0008] Furthermore, the lower plate is provided with a row of perforations, the perforations being in the same position as the perforations on the horizontal plate of the concave sieve frame.

[0009] Furthermore, the wire pusher assembly includes a wire pusher assembly bracket, and a curved steel wire support body is provided below the wire pusher assembly bracket. The curved steel wire support body is mounted on the support leg. The curved steel wire support body is moved by pushing the back of the curved steel wire support body through an electric cylinder. The wire pusher assembly bracket is provided with several sets of through holes, and guide rods are installed in the through holes. Springs are sleeved on the guide rods, and push blocks are installed below the guide rods.

[0010] Furthermore, the curved surface of the curved steel wire support is provided with several steel wire guide grooves. The steel wire is placed in the steel wire guide groove, one end of the steel wire is inserted into the through hole of the lower plate, and the other end abuts against the push block.

[0011] Furthermore, the bottom of the curved steel wire support is provided with a T-shaped slide, and the top of the support leg is provided with a T-shaped guide rail. The curved steel wire support achieves sliding through the assembly relationship between the T-shaped slide and the T-shaped guide rail.

[0012] Furthermore, the threading system includes a first support and a second support. A swinging electric cylinder is installed on the top of the second support. One end of the swinging frame is installed on the first support, and the other end is connected to the rod head of the swinging electric cylinder. An upper lifting mechanism support is installed below the swinging frame. Several lower electric cylinders are installed on the top of the upper lifting mechanism support. An upper lifting block is installed on the rod head of the lower electric cylinder. A lower lifting mechanism mounting frame is installed on the thread pushing assembly support. Several upper electric cylinders are installed on the lower lifting mechanism mounting frame. A lower lifting block is installed on the rod head of the upper electric cylinder. The front ends of both the upper and lower lifting blocks are provided with grooves.

[0013] Furthermore, a switch bracket is installed on the top of the second bracket, on which a proximity switch is installed. A long strip-shaped switch bracket is installed on the top side of the upper support part of the upper mechanism, and several proximity switches are installed on the long strip-shaped switch bracket, each corresponding to a steel wire.

[0014] Furthermore, the upper block is located inside the swing frame, and there are sliding grooves on both sides of the upper block. There is a slide rail inside the swing frame. Each upper block moves up and down along the slide rail when the lower electric cylinder is running. The upper block and the rod head of the lower electric cylinder are connected through the slide rail and the sliding groove, so that the swing frame drives the upper block to move left and right.

[0015] Through the above technical solution, the present invention can achieve the following beneficial effects:

[0016] Compared with existing manual wire threading, this utility model includes a positioner, a wire pushing assembly, a clamp, and a wire threading system, eliminating the phenomenon of the steel wire getting stuck in any direction (up, down, left, or right) when passing through the holes of the horizontal plate. It can realize the synchronous and automated threading of all steel wires, improving the threading efficiency by more than 10 times. The several proximity switches and their auxiliary components used in this utility model form an obstacle detection response system, which has the function of sensing and identifying the obstruction encountered by one or more steel wires during the threading process, and can quickly correct deviations to achieve fully automatic wire threading. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a concave plate sieve.

[0018] Figure 2 This is a 3D view of the wire threading device for a concave plate screen.

[0019] Figure 3 These are three-dimensional views of the concave plate screen wire threading device from other angles.

[0020] Figure 4 This is a diagram of the fixture structure.

[0021] Figure 5 This is a structural diagram of the wire pusher assembly.

[0022] Figure 6 This is a diagram showing the relationship between the curved steel wire support and the legs.

[0023] Figure 7 This is a three-dimensional view of one side of the threading system.

[0024] Figure 8 This is a three-dimensional view of the other side of the threading system.

[0025] Figure 9 This is a diagram showing the relationship between the top block and the swing frame.

[0026] Figure 10 This is a diagram showing the relationship between the upper top block and the lower electric cylinder.

[0027] Figure 11 This is a diagram without the positioner.

[0028] In the diagram: 1. Positioner; 2. Wire pusher assembly; 3. Wire threading system; 4. Clamp; 5. Piercing hole; 6. Second bracket; 7. First bracket; 8. Proximity switch; 9. Switch bracket; 11. Rotating shaft; 21. Wire pusher assembly bracket; 22. Curved steel wire support; 23. Support leg; 24. Pushing cylinder; 25. Guide rod; 26. Spring; 27. Push block; 28. Guide rail; 29. ​​Steel wire guide groove; 31. Upper lifting mechanism support; 32. Lower lifting mechanism mounting frame; 33. Swing frame; 34. Upper lifting block; 35. Swinging cylinder; 36. Upper cylinder; 37. Groove; 38. Lower lifting block; 39. Lower cylinder; 41. Side plate; 42. Side plate shaft hole; 43. Upper plate; 44. Lower plate; 45. Clamping device; 46. Auxiliary positioning pin; 47. Positioning block; 48. Positioning pin; 49. Induction plate. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] like Figure 1-11As shown, a wire threading device for a concave sieve includes a positioner 1, a wire pushing assembly 2, a wire threading system 3, and a clamp 4. The positioner is used to rotate the clamp, which is used to clamp or fix the concave sieve frame. The wire pushing assembly is used to push the wire. The wire threading system is used to identify and guide the wire to pass smoothly through the horizontal plate on the concave sieve, eliminating the wire from getting stuck on the horizontal plate of the concave sieve frame, and finally achieving that all the wires are threaded into the concave sieve.

[0031] The positioner is controlled by a servo motor. A clamp 4 and a wire threading system 3 are installed between the two rotating shafts 11 in the middle of the positioner 1. A concave screen frame is installed inside the clamp, and a wire pusher assembly 2 is installed on the wire threading side of the clamp.

[0032] The clamp 4 is a frame formed by two side plates 41, an upper plate 43, and a lower plate 44. The frame is curved, and the side plates 41 have induction plates 49 whose shape corresponds to the shape of the concave screen, effectively fixing or clamping the concave screen. The two side plates are mounted on the rotating shaft 11 of the positioner through side plate shaft holes 42. The concave screen frame is placed inside the curved frame and is fixed by one or more of the positioning blocks 47, clamping devices 45, and positioning pins 48. The lower plate has a row of through holes 5, which correspond to the positions of the through holes on the horizontal plate of the concave screen frame. In the above structure, the attached... Figure 4 One structural configuration is provided, comprising a curved frame formed by two side plates 41, an upper plate 43, and a lower plate 44. The lower plate 44 has a row of through holes 5, divided into four groups, corresponding to the four longitudinal sections of the concave sieve. A through hole is provided between the upper plate and the upper plate of the concave sieve, and a positioning pin 48 is installed within the through hole. Similarly, through holes are also provided between the side plates of the fixture and the side plates of the concave sieve, and positioning pins 48 are installed within these through holes. By installing positioning pins 48 in all directions, the concave sieve is prevented from shifting or shaking, facilitating subsequent wire threading. Provides a stable structure; clamping devices 45 are provided at the four corners of the clamp 4. The clamping devices include upper clamping plates 451 and lower clamping plates 452 respectively located above and below the side plates of the clamp. The upper clamping plates, side plates and lower clamping plates are connected in series by screws 454, and then the upper and lower parts are fastened by fastening nuts. It should be noted that the lateral length of the upper clamping plates and lower clamping plates needs to exceed the side plates of the concave plate screen to prevent the concave plate screen from detaching from the top or bottom of the clamp. That is, the upper clamping plates and lower clamping plates need to hold the concave plate screen in the clamp frame.

[0033] Based on the above embodiments, a positioning block 47 is added to the side plate 41 of the fixture to... Figure 4 For example, when the positioner rotating fixture flips to the top, the four positioning blocks 47 are on the lower surface. Therefore, when the concave screen frame is placed into the fixture, the positioning blocks 47 temporarily provide support. After installing the auxiliary positioning pins 46 and all positioning pins 48 at the lower plate, ensure that the through hole 5 of the lower plate is aligned with the middle hole of the concave screen horizontal plate. After fixing the concave screen frame with the clamping device, pull out the auxiliary positioning pins 46.

[0034] Figure 5 and 6 The diagram shows a wire pusher assembly, which includes a wire pusher assembly bracket 21 mounted on the base of the positioner 1. Two sets of support legs 23 are located below the bracket 21. A pusher cylinder 24 is mounted on the top of each support leg. A T-shaped guide rail 28 extends from the top of each support leg. Two T-shaped slides are provided at the bottom of a curved steel wire support 22. The curved steel wire support 22 is mounted on the T-shaped guide rails of the support legs via these slides. The rod head of the pusher cylinder 24 is connected to the back of the curved steel wire support 22. The curved steel wire support 22 is connected to the T-shaped guide rails of the support legs via the T-shaped slides. The assembly relationship of the guide rail is achieved by sliding under the drive of the electric cylinder. The front of the curved steel wire support body 22 is curved, and the surface is provided with several steel wire guide grooves 29. The steel wire is placed in the steel wire guide grooves. The wire pusher assembly bracket is provided with several through holes. The threaded guide rod 25 is installed in the through holes. After the guide rod 25 passes through the through hole, the upper part is installed with a nut. The lower part of the guide rod 25 is fitted with a spring 26. The bottom of the guide rod 25 is installed with a push block 27. The push block 27 abuts against one end of the steel wire. When the steel wire pushes the push block to compress the spring, the guide rod 25 will move upward.

[0035] Figure 7 and 8 As shown, the threading system includes a first support 7 and a second support 6, an upper lifting mechanism and a lower lifting mechanism. A swing cylinder 35 is installed on the top of the second support. One end of the swing frame 33 is installed on the first support, and the other end is connected to the rod head of the swing cylinder. The upper lifting mechanism includes an upper lifting mechanism support part 31 provided below the swing frame. Several lower cylinders 39 are installed on the top of the upper lifting mechanism support part. An upper lifting block 34 is installed on the rod head of the lower cylinder. The lower lifting mechanism includes a lower lifting mechanism mounting frame 32. The lower lifting mechanism mounting frame 32 is installed on the thread pushing assembly support. Several upper cylinders 36 are installed on the lower lifting mechanism mounting frame. A lower lifting block 38 is installed on the rod head of the upper cylinder. The front ends of both the upper and lower lifting blocks are provided with grooves 37.

[0036] A switch bracket 9 is installed on the top of the second bracket, and a proximity switch 8 is installed on it. A long strip switch bracket 10 is installed on the top side of the upper support part of the upper mechanism, and several proximity switches 8 are installed on the long strip switch bracket.

[0037] Figure 9 As shown, the upper top block 34 is located inside the swing frame 33. The upper top block has sliding grooves 341 on both sides, and the inner sidewall of the swing frame 33 has a slide rail 331. The two slide rails are a pair. The upper top block is fitted onto the slide rail 331 of the swing frame 33 through the sliding groove. Each upper top block 34 moves up and down along the slide rail when the lower electric cylinder 39 is running. The upper top block 34 and the rod head of the lower electric cylinder 39 are connected by a T-shaped slide rail and a T-shaped sliding groove, which can realize that the slide rail 331 of the swing frame 33 drives the upper top block 34 to move left and right.

[0038] Figure 2 and 11 As shown, the upper top block 34 provides an upward pushing force, and the lower top block 38 provides a downward pushing force. The groove 37 is semi-circular, and its diameter is greater than or equal to the diameter of the steel wire. At the same time, the swing frame 33 drives the upper top block 34 to provide left and right pushing forces, correcting any jamming in the up, down, left, or right direction that may occur during wire threading, solving the problem of obstruction, and allowing the steel wire to be threaded smoothly. It should be noted that the lower top mechanism is mounted on the wire pusher assembly bracket 21.

[0039] Combination Figure 2-11 As shown, the specific working process is as follows:

[0040] 1. The concave screen frame is fixed to the clamp.

[0041] (1) Rotate the positioner to rotate the fixture to the top of the positioner so that the fixture is in a convenient installation position. Place the concave screen frame into the fixture. The positioning block 47 on the side plate assists in supporting the concave screen frame.

[0042] (2) Figure 3 As shown, the two auxiliary positioning pins 46 are passed through the holes on the left and right edges of the lower plate of the fixture and the holes on the left and right edges of the first horizontal plate of the concave sieve in sequence.

[0043] (3) Pass the positioning pin 48 at the upper plate of the fixture through the upper plate hole of the fixture and the upper frame hole of the concave plate screen frame in sequence;

[0044] (4) Pass the two positioning pins 48 on the left and right sides of the fixture through the side plate holes and the side frame holes of the concave plate screen in sequence;

[0045] (5) Pass the clamping devices 45 at the four corners of the clamp through the upper clamping plate, the side plate hole and the lower clamping plate of the clamp respectively, tighten the bolts, fix the concave plate screen on the clamp, and finally pull out the two auxiliary positioning pins 46.

[0046] 2. Threading silk

[0047] (1) Start the positioner and rotate the clamp of the fixed concave screen frame to a position where the lower plate of the clamp is perpendicular to the plane of the positioner or at a position of 80°-90°.

[0048] (2) Then, all the steel wires are placed manually on the curved steel wire support 22. One end of the steel wire pushes the push block to compress the spring, and the other end passes through the perforation of the lower plate of the clamp and the perforation of the first horizontal plate of the concave screen frame in sequence.

[0049] (3) Rotate the positioner until the second horizontal plate is perpendicular to the plane of the positioner. If all the proximity switches in the proximity switch group on the long strip switch bracket sense that all the steel wires have passed through the second horizontal plate, continue to rotate the positioner until the third horizontal plate is perpendicular to the plane of the positioner. If all the proximity switches in the proximity switch group on the long strip switch bracket sense that all the steel wires have passed through the third horizontal plate, continue to rotate the positioner until the wire threading is completed.

[0050] (4) If, when the positioner is rotated to the point where the second horizontal plate is perpendicular to the plane of the positioner, one or more proximity switches in the proximity switch group do not sense the wire passing through the second horizontal plate, it indicates that one end of the wire is stuck on the second horizontal plate and the other end is on the push block, compressing the spring.

[0051] (5) After identifying the specific position of the wire that has not passed through the cross plate, start the wire threading system. The lower electric cylinder in the upper lifting mechanism that corresponds to the position of the wire that has not been sensed will push the upper lifting block upward. The straight slides on both sides of the upper lifting block slide upward along the straight guide rail in the swing frame to push the wire upward. The groove of the upper lifting block is semi-circular and has the same diameter as the wire.

[0052] (6) If the steel wire still does not pass through the second horizontal plate of the concave plate screen in step (5), the swing electric cylinder 35 will be activated to push the swing frame to move left and right, which will drive the upper top block to move left and right (the T-shaped slide of the upper top block slides along the T-shaped guide rail at the lower electric cylinder rod head), which can push the steel wire to move left and right.

[0053] (7) If in step (6) the wire does not pass through the second horizontal plate of the concave plate screen, the corresponding upper electric cylinder in the lower top mechanism will be activated to push the lower top block, push the wire downward, and pass the wire through the second horizontal plate;

[0054] (8) After all the steel wires have passed through the second horizontal plate, the rotating machine rotates until the third horizontal plate is perpendicular to the plane of the positioner;

[0055] (9) Continue to perform steps (3) to (8) until the sensing plate 49 rotates to the position where the proximity switch can sense the switch at the switch bracket 9. Start the push cylinder 24 to pull back the curved steel wire support. The T-shaped slide of the steel wire support moves along the T-shaped guide rail, clearing the space that hinders the movement of the clamp.

[0056] (10) Continue to perform steps (3) to (8) until the steel wire is fully inserted into the concave screen frame and the lower plate of the clamp is in full contact with the push block, and push the end of the steel wire into place.

[0057] (11) The positioner rotates the fixture in reverse to the initial installation position of the concave screen frame, removes the concave screen or welds the steel wire to the concave screen frame.

[0058] It should be noted that in step (6), the T-shaped slide of the upper block is located below the upper block, and the lower electric cylinder rod head is designed as a T-shaped guide rail. Figure 10As shown), the upper block can slide on the T-shaped guide rail of the lower electric cylinder's rod head via the T-shaped slide rail, thus satisfying the left and right movement of the swing frame. This left and right movement is based on... Figure 2 and Figure 9 Observe from an angle, at the same time Figure 9 One end of the swing frame is connected to the swing electric cylinder, and the other end is installed in the square hole of the first bracket 7.

[0059] The above descriptions are all preferred embodiments of this utility model. For those skilled in the art, any modifications to this utility model in various equivalent forms without departing from the principle of this utility model shall fall within the protection scope of the appended claims.

Claims

1. A concave screen wire threading device characterized by: The wire threading device includes a positioner, a wire pushing assembly, a wire threading system, and a clamp. The positioner is used to rotate the clamp, the clamp is used to hold or fix the concave screen frame, the wire pushing assembly is used to push the steel wire, and the wire threading system is used to identify and guide the steel wire to pass smoothly through the horizontal plate on the concave screen, eliminating the steel wire from getting stuck on the horizontal plate of the concave screen frame, and finally realizing that all steel wires are threaded into the concave screen.

2. A concave screen wire threading device according to claim 1, characterized in that: The middle part of the positioner is equipped with a clamp and a wire threading system. A concave screen frame is installed inside the clamp, and a wire pusher assembly is installed on the wire threading side of the clamp.

3. A wire threading device for a concave screen according to claim 1 or 2, characterised in that: The fixture includes a frame formed by two side plates, an upper plate, and a lower plate. The two side plates are mounted on the rotating shaft of the positioner through side plate shaft holes. The concave plate screen frame is placed inside the fixture and fixed by one or more of the following methods: positioning block, clamping device, and positioning pin.

4. A concave screen wire threading device according to claim 3, wherein: The lower plate is provided with a row of perforations, which correspond to the perforations on the horizontal plate of the concave plate screen frame.

5. A wire threading device for a concave screen according to claim 1 or 2, characterized in that: The wire pushing assembly includes a wire pushing assembly bracket, and a curved steel wire support body is provided below the wire pushing assembly bracket. The curved steel wire support body is set on the support leg. The curved steel wire support body is moved by pushing the back of the curved steel wire support body through an electric cylinder. The wire pushing assembly bracket is provided with several sets of through holes, and guide rods are installed in the through holes. Springs are sleeved on the guide rods, and push blocks are installed below the guide rods.

6. A concave screen wire threading device according to claim 5, wherein: The curved surface of the curved steel wire support is provided with several steel wire guide grooves. The steel wire is placed in the steel wire guide groove, one end of the steel wire is inserted into the through hole of the lower plate, and the other end abuts against the push block.

7. A concave screen wire threading device according to claim 6, wherein: The bottom of the curved steel wire support is equipped with a T-shaped slide rail, and the top of the support leg is equipped with a T-shaped guide rail. The curved steel wire support can slide through the assembly relationship between the T-shaped slide rail and the T-shaped guide rail.

8. A wire threading device for a concave screen according to claim 1 or 2, characterized in that: The threading system includes a first support, a second support, an upper support mechanism, and a lower support mechanism. A swing cylinder is installed on the top of the second support. One end of the swing frame is installed on the first support, and the other end is connected to the rod head of the swing cylinder. An upper support mechanism support is installed below the swing frame. Several lower cylinders are installed on the top of the upper support mechanism support. An upper block is installed on the rod head of the lower cylinder. A lower support mechanism mounting frame is installed on the thread pushing assembly support. Several upper cylinders are installed on the lower support mechanism mounting frame. A lower block is installed on the rod head of the upper cylinder. The front ends of both the upper and lower blocks are provided with grooves.

9. A concave screen wire threading device according to claim 8, wherein: A switch bracket is installed on the top of the second bracket, and a proximity switch is installed on it. A long strip switch bracket is installed on the top side of the upper support part of the upper mechanism, and several proximity switches are installed on the long strip switch bracket, each corresponding to a steel wire.

10. A concave screen wire threading device according to claim 8, characterized in that: The upper block is located inside the swing frame. The upper block has sliding grooves on both sides. The swing frame has a slide rail. Each upper block moves up and down along the slide rail when the lower electric cylinder is running. The upper block and the rod head of the lower electric cylinder are connected by the slide rail and the sliding groove.

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