A disc shear auxiliary tool changing device

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The design of the disc shear auxiliary blade changing device solves the problem of operators having difficulty applying force evenly and vertically, achieving stability and precision in the blade loading and unloading process, avoiding damage to the blade shaft caused by blade jamming, and improving the service life and cutting accuracy of the equipment.

CN224526103UActive Publication Date: 2026-07-21CHINA NAT HEAVY MACHINERY RES INSTCO

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: CHINA NAT HEAVY MACHINERY RES INSTCO
Filing Date: 2025-08-11
Publication Date: 2026-07-21

AI Technical Summary

Technical Problem

When changing disc shear blades, operators may find it difficult to apply even and vertical force, causing the blades to jam on the shear shaft, affecting shearing accuracy and causing wear on the shear shaft surface.

Method used

Design a disc shear auxiliary blade changing device. By rotating the handwheel, the lead screw is rotated to realize the extension and retraction of the three-jaw top plate, which drives the quick-release pull claw to load and unload the blade. This ensures that the force is even and vertical, and avoids the blade from getting stuck and damaging the blade shaft surface.

Benefits of technology

This achieves balanced and vertical force application during blade loading and unloading, preventing damage to the blade shaft surface after the blade gets stuck, thus improving cutting accuracy and equipment lifespan.

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Abstract

The utility model belongs to disc shearing edge technical field, especially relates to a disc shearing auxiliary tool changing device. A disc shearing auxiliary tool changing device, including fixed base, the middle rotatable connection of fixed base has the lead screw, the tail end of lead screw is equipped with hand wheel, the outside of lead screw is equipped with lead screw nut, lead screw nut is connected with three claw top tray, three claw top tray includes connecting disc, the pawl of rotation prevention that is connected on connecting disc and three top claw, the middle of pawl of rotation prevention is equipped with rotation -stopping U type groove, the direction perpendicular to the lead screw of fixed base is equipped with the baulk, the other end of baulk is slidably connected in rotation -stopping U type groove, and the end of top claw is equipped with quick -release puller. The utility model through rotating hand wheel can drive lead screw rotation, realize the expansion of three claw top tray, and further drive quick -release puller realize the tool of loading, and the tool of disassembling, guarantee the balanced and perpendicular to blade in the process of tool loading, tool disassembling, effectively avoid the damage of causing to the surface of cutter shaft after forcibly assembling to the blade jamming and influence shearing accuracy.

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Description

Technical Field

[0001] This utility model belongs to the field of disc shearing technology, and specifically relates to a disc shearing auxiliary blade changing device. Background Technology

[0002] At present, disc shears are widely used in various strip production lines for cutting the edges of strip materials. Disc shears achieve edge cutting by installing cylindrical blades on the upper and lower cutter shafts.

[0003] For disc shears used in finishing production lines to produce thin strip silicon steel, the clearance between the blade and the cutter shaft is extremely small to ensure the edge quality of the strip. During blade changes, the blade and cutter shaft must be perfectly perpendicular for smooth installation and removal. Currently, blade changes rely on operators manually fitting the blade onto the cutter shaft section. This requires prolonged handling of a heavy blade to align the hole and shaft, and the force applied by both hands is difficult to maintain evenly and perpendicularly. Therefore, even a slight tilt of the blade will cause it to jam on the cutter shaft, requiring repeated tapping with a nylon rod for reassembly. This presents a significant technical challenge for the operators and is time-consuming and labor-intensive. Furthermore, the repeated tapping of the blade with the nylon rod for forced assembly causes wear on the cutter shaft surface, which over time affects the shearing accuracy and consequently the edge quality of the strip. Utility Model Content

[0004] To address the problem in existing technologies where operators often struggle to maintain balanced and perpendicular force when manually changing disc shear blades, leading to blade jamming on the shear shaft, this invention aims to provide an auxiliary blade changing device for disc shears. By rotating the handwheel, the lead screw can be rotated, enabling the extension and retraction of the three-jaw jack, which in turn drives the quick-release pawl to load and unload the blade. This ensures that the force applied during loading and unloading is balanced and perpendicular to the blade, effectively preventing damage to the shear shaft surface caused by forced assembly after the blade jams, thus affecting cutting accuracy.

[0005] The technical solution of this utility model is as follows: a disc shear auxiliary blade changing device, including a fixed base, a lead screw rotatably connected in the middle of the fixed base, a handwheel at the tail end of the lead screw, a lead screw nut sleeved on the outside of the lead screw, and a three-jaw top plate connected to the lead screw nut. The three-jaw top plate includes a connecting plate, an anti-rotation hand claw connected to the connecting plate, and three top claws. The anti-rotation hand claw has an anti-rotation U-shaped groove in the middle. The fixed base has a stop bar perpendicular to the lead screw, and the other end of the stop bar is slidably connected to the anti-rotation U-shaped groove. The end of the top claw has a quick-release pull claw.

[0006] The lead screw and the fixed base are rotatably connected by a tapered roller bearing. There are two tapered roller bearings. The outer side of the tapered roller bearing is provided with a shaft retaining ring, and the outer side of the shaft retaining ring is provided with a dust cover.

[0007] The quick-release pull claw includes a pull claw body, with a pull claw slot and a first boss at each end of the pull claw body. A quick-locking switch mounting hole is provided on the side of the pull claw body near the first boss. The pull claw slot is provided with two threaded holes and is used to engage the blade.

[0008] A nylon block is provided on the outside of the pull claw jaw, and the nylon block is fixed by a threaded hole.

[0009] The top claw is provided with a second protrusion at each end. The second protrusion near the connecting plate is provided with a quick-locking switch mounting hole 2, and the second protrusion away from the connecting plate is provided with a quick-locking switch mounting hole 1. Quick-locking switches are respectively provided in quick-locking switch mounting holes 2 and 1. The quick-release pull claw is fixed to the three-claw top plate by quick-locking switches.

[0010] The second boss is arranged parallel to the first boss.

[0011] The technical advantages of this utility model are as follows: 1. By rotating the handwheel, the lead screw can be rotated, realizing the extension and retraction of the three-jaw top plate, which in turn drives the quick-release claw to load and unload the blade. This ensures that the force applied during loading and unloading is balanced and perpendicular to the blade, effectively preventing damage to the blade shaft surface caused by forced assembly after the blade gets stuck, thus affecting the cutting accuracy. 2. The three-jaw top plate and quick-release claw transmit force through the parallel second and first bosses. A nylon block is bolted to the contact surface between each first boss and the blade, effectively preventing damage to the blade. 3. Dust covers are installed on the outer sides of the two tapered roller bearings via shaft retaining rings to prevent dust from entering and increase bearing life.

[0012] The following will provide further explanation in conjunction with the accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a disc shear auxiliary blade changing device of this utility model when disassembling the blade.

[0014] Figure 2 This is a schematic diagram of the structure of a disc shear auxiliary blade changing device of this utility model when the blade is being loaded.

[0015] Figure 3 This is a cross-sectional view of a disc shear auxiliary blade changing device according to this utility model.

[0016] Figure 4 This is a structural diagram of the three-claw top plate in a disc shear auxiliary blade changing device of this utility model.

[0017] Figure 5 This is a structural diagram of the quick-release pull claw in a disc shear auxiliary blade changing device of this utility model.

[0018] Figure 6 This is a schematic diagram of the fan-shaped sleeve of a disc shear auxiliary blade changing device according to this utility model.

[0019] Figure 7 This is a schematic diagram illustrating the installation and use of a disc shear auxiliary blade changing device during blade changing according to this utility model.

[0020] Reference numerals: 1-Quick-release pull claw, 101-Pull claw bayonet, 102-Quick-locking switch mounting hole, 103-First boss, 104-Threaded hole, 2-Nylon block, 3-Three-jaw top plate, 31-Quick-locking switch mounting hole one, 32-Second boss, 33-Top claw, 34-Quick-locking switch mounting hole two, 35-Anti-rotation claw, 36-Anti-rotation U-groove, 37-Connecting plate, 4-Fixed base, 5-Stop bar, 6-Quick-locking switch, 7-Lead screw, 8-Lead screw nut, 9-Handwheel, 10-Shaft retaining ring, 11-Dust cover, 12-Tap roller bearing, Ⅰ-Disc shear blade, Ⅱ-Sector sleeve, Ⅲ-Disc shear shaft, Ⅳ-Disc shear auxiliary blade changing device. Detailed Implementation

[0021] Example 1

[0022] like Figures 1-5 As shown, a disc shear auxiliary blade changing device includes a fixed base 4, a lead screw 7 rotatably connected to the center of the fixed base 4, a handwheel 9 at the tail end of the lead screw 7, a lead screw nut 8 sleeved on the outside of the lead screw 7, and a three-jaw top plate 3 connected to the lead screw nut 8. The three-jaw top plate 3 includes a connecting plate 37, an anti-rotation claw 35 connected to the connecting plate 37, and three top claws 33. The anti-rotation claw 35 has an anti-rotation U-shaped groove 36 in the middle. The fixed base 4 has a stop bar 5 perpendicular to the lead screw 7. The other end of the stop bar 5 is slidably connected to the anti-rotation U-shaped groove 36. The end of the top claws 33 has a quick-release pull claw 1.

[0023] The connecting plate 37 of the three-jaw top plate 3 is bolted to the lead screw nut 8, enabling synchronous movement of the three-jaw top plate 3 and the lead screw nut 8 on the lead screw 7. One end of the stop rod 5 is bolted to the fixed base 4, and the other end is placed in the U-shaped groove 36 of the three-jaw top plate 3. The stop rod 5 restricts the rotation of the three-jaw top plate 3 as the lead screw 7 rotates. When the handwheel 9 rotates the lead screw 7, the lead screw nut 8 drives the three-jaw top plate 3 to extend and retract under the action of the stop rod 5, thereby driving the quick-release pull claw to load and unload the blade. At the same time, it ensures that the force is balanced and perpendicular to the blade during the loading and unloading process, effectively avoiding damage to the blade shaft surface caused by forced assembly after the blade gets stuck, which would affect the cutting accuracy.

[0024] Example 2

[0025] Based on Embodiment 1, in this embodiment, preferably, a tapered roller bearing 12 is provided at the rotatable connection between the lead screw 7 and the fixed base 4, and there are two tapered roller bearings 12. A shaft retaining ring 10 is provided on the outside of the tapered roller bearing 12, and a dust cover 11 is provided on the outside of the shaft retaining ring 10.

[0026] In this invention, a tapered roller bearing 12 is provided at the rotatable connection between the lead screw 7 and the fixed base 4. There are two tapered roller bearings 12. A shaft retaining ring 10 is provided on the outside of the tapered roller bearing 12. A dust cover 11 is provided on the outside of the shaft retaining ring 10. In this invention, dust covers are installed on the outside of the two tapered roller bearings through the shaft retaining ring to prevent dust from entering and increase the service life of the bearings.

[0027] Example 3

[0028] Based on Embodiment 1 or Embodiment 2, in this embodiment, preferably, the quick-release pull claw 1 includes a pull claw body, and the two ends of the pull claw body are respectively provided with a pull claw slot 101 and a first boss 103. The pull claw body is provided with a quick-locking switch mounting hole 102 on the side near the first boss 103. The pull claw slot 101 is provided with two threaded holes 104. The pull claw slot 101 is used to engage the blade.

[0029] The pull claw body of this utility model is provided with a pull claw slot 101 and a first protrusion 103 at both ends. The pull claw body is provided with a quick-locking switch mounting hole 102 on the side near the first protrusion 103, which facilitates the quick-release pull claw 1 to be quickly fixedly connected to the three-claw top plate 3.

[0030] Example 4

[0031] Based on Embodiment 1 or Embodiment 3, in this embodiment, preferably, a nylon block 2 is provided on the outer side of the pull claw 101, and the nylon block 2 is fixed through a threaded hole 104.

[0032] The pull claw 101 of this utility model is provided with a nylon block 2 on the outside. The nylon block 2 is fixed by a threaded hole 104. The nylon block 2 can effectively prevent the blade from being damaged.

[0033] Example 5

[0034] Based on Embodiment 1 or Embodiment 4, in this embodiment, preferably, the top claw 33 is provided with a second protrusion 32 at both ends. The second protrusion 32 near the connecting plate 37 is provided with a quick-locking switch mounting hole 2 34, and the second protrusion 32 away from the connecting plate 37 is provided with a quick-locking switch mounting hole 1 31. A quick-locking switch 6 is provided in the quick-locking switch mounting hole 2 34 and the quick-locking switch mounting hole 1 31 respectively. The quick-release pull claw 1 is fixed to the three-claw top plate 3 by the quick-locking switch 6.

[0035] The quick-locking switch mounting hole 2 34 and quick-locking switch mounting hole 1 31 of this utility model are respectively provided with quick-locking switches 6. The quick-release pull claw 1 is fixed on the three-claw top plate 3 by the quick-locking switch 6, which can realize quick disassembly and assembly.

[0036] Example 6

[0037] Based on Embodiment 1 or Embodiment 5, in this embodiment, preferably, the second boss 32 is arranged parallel to the first boss 103.

[0038] In this invention, the second boss 32 is arranged parallel to the first boss 103, which facilitates the transmission of pulling force between the three-claw top plate 3 and the quick-release pull claw 1 through the parallel second boss 32 and the first boss 103.

[0039] When using this utility model in practice, please refer to the appendix. Figure 1 and Figure 7 The end face of the disc shear shaft III has four threaded holes that match the fixing base 4 of the auxiliary tool changing device IV. When tool removal is required, the specific process is as follows:

[0040] First, fit the sector sleeve II onto the adjacent shaft section where the cutting tool is mounted. Sector sleeve II is as follows: Figure 6 As shown, the central angle of the sector sleeve II is 150 degrees, its inner diameter is equal to the diameter of the shaft segment adjacent to the blade, and its outer diameter is equal to the aperture of the disc shear blade I. The chord length of the sector sleeve is 1.93R, and the aperture of the disc shear blade is 2R. Obviously, 1.93R is less than 2R, so the blade can be easily fitted onto the sector sleeve while ensuring that the blade is perpendicular to the blade shaft;

[0041] Next, install the auxiliary blade changing device IV onto the end face of the disc shear shaft III using screws. Crank the handwheel 9 to rotate the lead screw 7, moving the three-jaw top plate 3 to the front end of the lead screw 7. Then, use the quick-lock switch 6 to install the three quick-release claws 1 onto the three-jaw top plate 3 near the front end of the top claw. The claw slots 101 of the quick-release claws 1 engage the blade I. Crank the handwheel 9 in the opposite direction to rotate the lead screw 7, moving the three-jaw top plate 3 outwards. The first boss 103 and the second boss 32 of the quick-release claws 3 transmit pulling force, causing the quick-release claws 1 to move outwards, which in turn moves the blade I outwards, completing the blade disassembly action.

[0042] See appendix Figure 2 and Figure 7 When it is necessary to load the blade, the specific process is as follows:

[0043] Place the sector sleeve II onto the adjacent shaft section of the blade mounting area, then place the blade I onto the sector sleeve II. First, use the quick-lock switch 6 to install the three quick-release claws 1 onto the three-jaw top plate 3 near the rear end of the top claw. Then, crank the handwheel 9 to rotate the screw 7, moving the three-jaw top plate 3 to the rear end of the screw 7. Next, install the auxiliary blade changing device IV onto the end face of the disc shear shaft III using screws. Crank the handwheel 9 in the opposite direction to rotate the screw 7, moving the three-jaw top plate 3 inward. The three-jaw top plate will then push the blade I inward to complete the blade mounting action.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A disc shear auxiliary blade changing device, characterized in that: The device includes a fixed base (4), a lead screw (7) rotatably connected in the middle of the fixed base (4), a handwheel (9) at the tail end of the lead screw (7), a lead screw nut (8) sleeved on the outside of the lead screw (7), a three-jaw top plate (3) connected to the lead screw nut (8), the three-jaw top plate (3) including a connecting plate (37), an anti-rotation claw (35) connected to the connecting plate (37) and three top claws (33), an anti-rotation U-shaped groove (36) provided in the middle of the anti-rotation claw (35), a stop bar (5) provided in the direction perpendicular to the lead screw (7) of the fixed base (4), the other end of the stop bar (5) being slidably connected in the anti-rotation U-shaped groove (36), and a quick-release pull claw (1) provided at the end of the top claw (33).

2. The disc shear auxiliary blade changing device according to claim 1, characterized in that: The lead screw (7) and the fixed base (4) are rotatably connected by a tapered roller bearing (12). There are two tapered roller bearings (12). A shaft retaining ring (10) is provided on the outside of the tapered roller bearing (12). A dust cover (11) is provided on the outside of the shaft retaining ring (10).

3. The disc shear auxiliary blade changing device according to claim 1, characterized in that: The quick-release pull claw (1) includes a pull claw body. The two ends of the pull claw body are respectively provided with a pull claw slot (101) and a first boss (103). The pull claw body is provided with a quick-locking switch mounting hole (102) on the side near the first boss (103). The pull claw slot (101) is provided with two threaded holes (104). The pull claw slot (101) is used to engage the blade.

4. The disc shear auxiliary blade changing device according to claim 3, characterized in that: The pull claw (101) has a nylon block (2) on its outer side, and the nylon block (2) is fixed by a threaded hole (104).

5. The disc shear auxiliary blade changing device according to claim 3, characterized in that: The top claw (33) is provided with a second protrusion (32) at both ends. The second protrusion (32) near the connecting plate (37) is provided with a quick-locking switch mounting hole two (34), and the second protrusion (32) away from the connecting plate (37) is provided with a quick-locking switch mounting hole one (31). The quick-locking switch mounting hole two (34) and the quick-locking switch mounting hole one (31) are respectively provided with a quick-locking switch (6). The quick-release pull claw (1) is fixed on the three-claw top plate (3) by the quick-locking switch (6).

6. The disc shear auxiliary blade changing device according to claim 5, characterized in that: The second boss (32) is arranged parallel to the first boss (103).