A guide structure for preventing the bite of shears
By designing a guide structure, the problem of blade engagement in traditional flying shears is solved, enabling automatic blade guidance and pressing, improving cutting accuracy and tool life, and reducing replacement frequency and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XI LIN IRON & STEEL GRP
- Filing Date
- 2025-06-05
- Publication Date
- 2026-06-05
AI Technical Summary
Traditional flying shears are prone to blade misalignment during use due to inappropriate lateral clearance between the upper and lower blades, resulting in blade damage and substandard cutting, increasing the frequency and cost of blade replacement.
Design a guide structure to prevent shear blade engagement. Through the combination of guide groove, support shaft, force plate and guide blade, the automatic guidance and pressing of the shear blade is realized, the shear blade gap is adjusted, and excessive contact and engagement are prevented.
It effectively prevents blade seizure accidents, reduces blade replacement time, increases blade lifespan and cutting accuracy, and lowers costs.
Smart Images
Figure CN224322430U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a design that effectively prevents the blades of flying shears, double-length shears, and other shearing machines from biting together when cutting under load or cutting without air. It particularly relates to the blade design of flying shears for bar and wire production lines and belongs to the field of flying shear and shearing machine technology. Background Technology
[0002] In bar and wire production, traditional flying shears use a flat or beveled blade design along their entire length. After blade replacement, excessive lateral clearance between the upper and lower blades often leads to burrs on the material's end face during shearing; conversely, insufficient lateral clearance causes blade biting during shearing, resulting in blade damage and, in severe cases, blade failure. Currently, repeatedly adjusting the lateral clearance by replacing the shims is time-consuming and costly. This design, by modifying the blade guide structure before shearing, effectively prevents blade damage caused by biting. This not only reduces blade replacement time but also significantly extends the blade's lifespan. Utility Model Content
[0003] This invention proposes a guide structure to prevent blade engagement, solving the problem that traditional flying shears often suffer from difficulty in adjusting the lateral clearance between the upper and lower blades during installation due to transmission clearance, tooth clearance, and wear during use. Typically, after blade replacement, the clearance between the upper and lower blades appears normal upon manual rotation of the shear arm. However, upon power-on and startup, the accumulated clearance within the equipment itself causes excessive lateral engagement of the blades, leading to blade damage. This, in turn, results in uneven or substandard cut surfaces of the material being sheared, increasing scrap volume, lowering performance indicators, and raising spare parts costs.
[0004] The technical solution of this utility model is as follows:
[0005] This utility model is a guide structure to prevent shear blades from biting together, including a flying shear machine mounting base, a shear blade body is provided on the side of the flying shear machine mounting base, a cutting edge is provided on the top of the shear blade body, and a guide mechanism is provided on the top of the cutting edge.
[0006] The guiding mechanism includes a guide groove, which is formed on the top of the flying shear machine mounting base. A support shaft is rotatably connected inside the guide groove. A force-bearing plate is fixedly connected to the circumferential surface of the support shaft. A rotating plate is fixedly connected to the circumferential surface of the support shaft. A guide limiting block is fixedly connected to the side of the rotating plate. A guide blade is fixedly connected to the top of the cutting edge. The purpose of this mechanism is to prevent the cutting edge from chipping due to the cutting edge biting together.
[0007] Optionally, the side of the flying shear mounting base is provided with a sliding groove, and a limiting bolt is slidably connected inside the sliding groove. The side of the shear blade body is provided with a mounting hole. The purpose of this is to limit the guiding distance of the guiding shear blade body and prevent the shear blade body from reducing its cutting effect.
[0008] Optionally, the radius of the guide blade is set to 90-120 mm, the length of the guide blade is set to 10-15% of the total length of the shear blade body, the height of the guide blade is set to 3-4 cm, and the thickness of the guide blade is the same as the thickness of the shear blade body. The design of the guide blade enables the shearing tool to better guide the material during the shearing process, reduce wear and uneven force distribution, and improve the shearing effect and the service life of the tool.
[0009] Optionally, a torsion spring is fixedly connected inside the guide groove, and one end of the torsion spring away from the inside of the guide groove is fixedly connected to the circumferential surface of the support shaft. A displacement groove is provided on the side of the shear blade body. The purpose of this is to ensure that the shear blade body can automatically reset after being guided and displaced with another shear blade body, thereby reducing manual intervention.
[0010] Optionally, the number of the support shaft, guide limiting block and displacement groove is set to two, and they are symmetrical to each other along the vertical central axis of the flying shear machine mounting base. The top of the force plate is located on the displacement trajectory of the shear blade body. The purpose is to improve the shearing effect by using the two guide limiting blocks to adjust the minimum gap of the shear blade.
[0011] Optionally, the flying shear mounting base is provided with a pressing mechanism, which includes a hydraulic cylinder. The hydraulic cylinder is fixedly connected inside the guide groove. One end of the hydraulic cylinder is slidably connected to a force rod via a piston, and the other end of the hydraulic cylinder is slidably connected to a hydraulic rod via another piston. The end of the hydraulic rod away from the side of the hydraulic cylinder is fixedly connected to a pressing plate. The purpose of this mechanism is to press the shear blade body to prevent displacement of the shear blade body and prevent it from working in conjunction with another shear blade body.
[0012] Optionally, a return spring is fixedly connected to the side of the hydraulic cylinder, and the end of the return spring away from the side of the hydraulic cylinder is fixedly connected to the side of the pressing plate. The purpose of this is to ensure that the pressing plate can adjust the pressing distance through different shear blade bodies.
[0013] Optionally, the top end of the force-bearing rod is located on the displacement trajectory of the force-bearing plate, and the initial state of the return spring is relaxed, the purpose of which is to ensure that the rotation of the force-bearing plate can move the force-bearing rod.
[0014] The working principle and beneficial effects of this utility model are as follows:
[0015] 1. In this utility model, through the mutual cooperation between the guide mechanism components, the guide blades of the upper and lower shear bodies first contact each other. At this time, the guide blades are forced to move the shear bodies inside the groove, causing the shear bodies to retract into the guide groove, minimizing the gap between the two shear blades. Then, the guide blades contact and cut. This design achieves the effect of automatic guidance and adjustment of the shear bodies, limiting the maximum closed position of the shear blades when cutting human bodies of different sizes, preventing excessive contact of the shear blades, and thus effectively avoiding the problem of biting.
[0016] 2. In this utility model, through the mutual cooperation between the pressing mechanism components, the force plate rotates and squeezes the force rod, causing the liquid pressure in the hydraulic cylinder to push the hydraulic rod out, which drives the pressing plate to move and press the shear blade body, preventing the guide blade from impacting and avoiding shear blade displacement deviation. The pressing plate automatically adjusts the pressure through the reset spring. This design achieves the effect of automatically pressing the shear blade body of different sizes, preventing excessive pressing from causing seizing, and improving shearing accuracy and stability. Attached Figure Description
[0017] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.
[0018] Figure 1 This is a structural schematic diagram of the overall three-dimensional appearance of the flying shear machine mounting base of this utility model;
[0019] Figure 2 This is a schematic diagram of the overall three-dimensional cross-section of the flying shear machine mounting base of this utility model;
[0020] Figure 3 This is a three-dimensional enlarged structural schematic diagram of the shear blade body of this utility model;
[0021] Figure 4 This utility model Figure 1 A three-dimensional magnified structural diagram of A in the diagram;
[0022] Figure 5 This utility model Figure 2 A three-dimensional magnified structural diagram of B.
[0023] In the diagram: 1. Flying shear mounting base; 2. Shear blade body; 3. Blade edge; 4. Guide mechanism; 41. Guide groove; 42. Support shaft; 43. Force plate; 44. Rotating plate; 45. Guide limiting block; 46. Guide blade; 47. Slide groove; 48. Limiting bolt; 49. Mounting hole; 410. Torsion spring; 411. Displacement groove; 5. Pressing mechanism; 51. Hydraulic cylinder; 52. Force rod; 53. Hydraulic rod; 54. Pressing plate; 55. Return spring. Detailed Implementation
[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.
[0025] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0026] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0027] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Example 1
[0028] Reference Figures 1-5 This is the first embodiment of the present utility model, which proposes a guide structure to prevent the blades from biting together, including a flying shear machine mounting base 1, a shear blade body 2 provided on the side of the flying shear machine mounting base 1, a cutting edge 3 provided on the top of the shear blade body 2, and a guide mechanism 4 provided on the top of the cutting edge 3.
[0029] The guiding mechanism 4 includes a guide groove 41, which is located on the top of the flying shear machine mounting base 1. A support shaft 42 is rotatably connected inside the guide groove 41. A force-bearing plate 43 is fixedly connected to the circumferential surface of the support shaft 42. A rotating plate 44 is fixedly connected to the circumferential surface of the support shaft 42. A guide limiting block 45 is fixedly connected to the side of the rotating plate 44. A guide blade 46 is fixedly connected to the top of the cutting edge 3. The purpose of this is to prevent the cutting edge 3 from breaking due to biting between the cutting edges.
[0030] The side of the flying shear machine mounting base 1 is provided with a sliding groove 47, and a limiting bolt 48 is slidably connected inside the sliding groove 47. The side of the shear blade body 2 is provided with a mounting hole 49, the purpose of which is to limit the guiding distance of the guiding shear blade body 2 and prevent the shear blade body 2 from reducing its cutting effect.
[0031] The radius of the guide blade 46 is set to be between 90 and 120 mm. The length of the guide blade 46 is set to 10% to 15% of the total length of the shear body 2. The height of the guide blade 46 is set to 3 to 4 cm. The thickness of the guide blade 46 is the same as the thickness of the shear body 2. The design of the guide blade 46 enables the shearing tool to better guide the material during the shearing process, reduce wear and uneven force distribution, and improve the shearing effect and the service life of the tool.
[0032] A torsion spring 410 is fixedly connected inside the guide groove 41. One end of the torsion spring 410 away from the inside of the guide groove 41 is fixedly connected to the circumferential surface of the support shaft 42. A displacement groove 411 is provided on the side of the shear blade body 2. The purpose is to ensure that the shear blade body 2 can automatically reset after being guided and displaced with another shear blade body 2, thereby reducing manual intervention.
[0033] The number of support shaft 42, guide limiting block 45 and displacement groove 411 is set to two, and they are symmetrical to each other along the vertical central axis of the flying shear machine mounting base 1. The top of the force plate 43 is located on the displacement trajectory of the shear blade body 2. The purpose is to improve the shearing effect by modulating the minimum gap of the shear blade through the two guide limiting blocks 45.
[0034] In this embodiment, when the shear body 2 with the guide blade 46 is needed, the end with the guide blade 46 faces the same side. The operator presses the shear body 2 down against the side of the flying shear machine mounting base 1. At this time, the shear body 2 presses the force plate 43. The force plate 43 rotates through the support shaft 42. The rotation of the support shaft 42 drives the rotating plate 44 to rotate. The rotation of the rotating plate 44 drives the guide limiting block 45 into the displacement groove 411. At this time, the mounting hole 49 on the side of the shear body 2 and the slide groove 47 are positioned. The shear body 2 is installed by the limiting bolt 48. During the flying shear movement, the guide blades 46 of the upper and lower shear bodies 2 contact first. At this time, the guide blade 46 is driven by the force to move the shear body 2 inside the slide groove 47, so that the shear body 2 retracts into the guide groove 41, so that the shear gap between the two shear bodies 2 is adjusted to the minimum, and then the guide blade 3 contacts and cuts. Example 2
[0035] Reference Figures 1-5This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the flying shear machine mounting base 1 is provided with a pressing mechanism 5. The pressing mechanism 5 includes a hydraulic cylinder 51. The hydraulic cylinder 51 is fixedly connected to the inside of the guide groove 41. One end of the hydraulic cylinder 51 is slidably connected to a force rod 52 through a piston. The other end of the hydraulic cylinder 51 is slidably connected to a hydraulic rod 53 through another piston. The end of the hydraulic rod 53 away from the side of the hydraulic cylinder 51 is fixedly connected to a pressing plate 54. The purpose of this is to press the shear blade body 2 to prevent the shear blade body 2 from shifting and failing to cooperate with the other shear blade body 2.
[0036] A return spring 55 is fixedly connected to the side of the hydraulic cylinder 51. The end of the return spring 55 away from the side of the hydraulic cylinder 51 is fixedly connected to the side of the pressing plate 54. The purpose is to ensure that the pressing plate 54 can adjust the pressing distance through different shear blade bodies 2.
[0037] The top of the force-bearing rod 52 is located on the displacement trajectory of the force-bearing plate 43. The initial state of the return spring 55 is relaxed, which is to ensure that the rotation of the force-bearing plate 43 can move the force-bearing rod 52.
[0038] Compared to Embodiment 1, further, when the force plate 43 rotates, it squeezes the force rod 52, and the force rod 52 retracts into the hydraulic cylinder 51 under force. At this time, the hydraulic rod 53 extends outward under the pressure of the liquid inside the hydraulic cylinder 51. The outward extension of the hydraulic rod 53 drives the pressing plate 54 to move. The moving pressing plate 54 presses the shear blade body 2 during shearing to prevent the guide blade 46 from contacting and causing an impact, resulting in the displacement of the shear blade body 2 and causing deviation. When the shearing material is different, the pressing plate 54 automatically adjusts the pressure through the return spring 55 to avoid seizing due to excessive pressing.
[0039] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A guide structure for preventing shear blade engagement, characterized in that, The flying shear machine includes a mounting base (1), a shear blade body (2) is provided on the side of the mounting base (1), a cutting edge (3) is provided on the top of the shear blade body (2), and a guide mechanism (4) is provided on the top of the cutting edge (3). The guiding mechanism (4) includes a guide groove (41), which is opened on the top of the flying shear machine mounting base (1). A support shaft (42) is rotatably connected inside the guide groove (41). A force plate (43) is fixedly connected to the circumferential surface of the support shaft (42). A rotating plate (44) is fixedly connected to the circumferential surface of the support shaft (42). A guide limiting block (45) is fixedly connected to the side of the rotating plate (44). A guide blade (46) is fixedly connected to the top of the cutting edge (3).
2. The guide structure for preventing shear blade engagement according to claim 1, characterized in that, The side of the flying shear mounting base (1) is provided with a sliding groove (47), and a limiting bolt (48) is slidably connected inside the sliding groove (47). The side of the shear blade body (2) is provided with a mounting hole (49).
3. The guide structure for preventing shear blade engagement according to claim 2, characterized in that, The radius of the guide blade (46) is set to 90-120 mm, the length of the guide blade (46) is set to 10-15% of the total length of the shear blade body (2), the height of the guide blade (46) is set to 3-4 cm, and the thickness of the guide blade (46) is the same as the thickness of the shear blade body (2).
4. The guide structure for preventing shear blade engagement according to claim 3, characterized in that, A torsion spring (410) is fixedly connected inside the guide groove (41). One end of the torsion spring (410) away from the inside of the guide groove (41) is fixedly connected to the circumferential surface of the support shaft (42). A displacement groove (411) is provided on the side of the shear blade body (2).
5. The guide structure for preventing shear blade engagement according to claim 4, characterized in that, The number of the support shaft (42), guide limiting block (45) and displacement groove (411) is set to two, and they are symmetrical to each other along the vertical central axis of the flying shear machine mounting base (1). The top of the force plate (43) is located on the displacement trajectory of the shear blade body (2).
6. The guide structure for preventing shear blade engagement according to claim 5, characterized in that, The flying shear machine mounting base (1) is provided with a pressing mechanism (5). The pressing mechanism (5) includes a hydraulic cylinder (51). The hydraulic cylinder (51) is fixedly connected inside the guide groove (41). One end of the hydraulic cylinder (51) is slidably connected to a force rod (52) through a piston. The other end of the hydraulic cylinder (51) is slidably connected to a hydraulic rod (53) through another piston. The end of the hydraulic rod (53) away from the side of the hydraulic cylinder (51) is fixedly connected to a pressing plate (54).
7. The guide structure for preventing shear blade engagement according to claim 6, characterized in that, A reset spring (55) is fixedly connected to the side of the hydraulic cylinder (51), and the end of the reset spring (55) away from the side of the hydraulic cylinder (51) is fixedly connected to the side of the pressing plate (54).
8. The guide structure for preventing shear blade engagement according to claim 7, characterized in that, The top of the force-bearing rod (52) is located on the displacement trajectory of the force-bearing plate (43), and the initial state of the reset spring (55) is relaxed.