A shearing mechanism capable of automatically adjusting blade position

Abstract

The invention discloses a shearing mechanism capable of automatically adjusting the position of a blade, wherein a first blade is provided with a first blade edge; a second blade is provided with a second blade edge, and the first blade edge is arranged obliquely relative to the second blade edge; in an initial state, the two ends of the first blade edge in the length direction are respectively located on both sides of the second blade edge in the thickness direction of the second blade; the first blade and the second blade are both arranged in a driving assembly, the first blade is rotatably connected to the driving assembly, and the driving assembly drives the first blade and / or the second blade to make the two blades approach each other for shearing; an elastic member applies an elastic force to the first blade to make it rotate; a limiting member limits the further rotation of the first blade by the elastic force in the initial state; during shearing, the first blade edge and the second blade edge abut against each other, and under the action of the abutting reaction force, the first blade overcomes the elastic force and rotates in the opposite direction to complete shearing. The mechanism can automatically adjust the position between the blades and always maintain a good shearing effect.

Description

Technical Field

[0001] The invention belongs to the technical field of shearing mechanisms, and in particular relates to a shearing mechanism capable of automatically adjusting the position of a blade. Background Art

[0002] A shearing mechanism is a commonly used shearing tool, which usually utilizes two blades to cooperate with each other to shear objects.

[0003] The existing shearing mechanism relies on a screw to adjust the gap between the two blades so that the object can be sheared smoothly.

[0004] However, it is very difficult to repair and adjust the blades, especially in automated production lines, which will cause long downtime, affect production output, and the blades are prone to wear. Summary of the invention

[0005] To solve the above problems, the object of the present invention is to provide a shearing mechanism capable of automatically adjusting the position of blades, wherein the mechanism can automatically adjust the position between blades to always maintain a good shearing effect.

[0006] To achieve the above object, the technical solution of the present invention is:

[0007] A shearing mechanism capable of automatically adjusting the position of a blade, comprising:

[0008] A first blade having a first cutting edge;

[0009] A second blade is provided with a second blade edge, wherein the first blade edge is inclined relative to the second blade edge; and in an initial state, both ends of the first blade edge in a length direction are respectively located on both sides of the second blade edge in a thickness direction of the second blade;

[0010] A driving assembly, wherein the first blade and the second blade are both arranged on the driving assembly, the first blade is connected to the driving assembly by rotating along a central axis along the length direction of the second blade, and the driving assembly drives the first blade and / or the second blade to bring the two blades close to each other for shearing;

[0011] an elastic member, applying an elastic force to the first blade to make it rotate;

[0012] a limiter to limit further rotation of the first blade in the initial state by the elastic force;

[0013] During shearing, the first blade and the second blade abut against each other, and under the action of the abutting reaction force, the first blade overcomes the elastic force and rotates in the opposite direction, so that one end of the first blade gradually moves toward the other side of the second blade to complete the shearing. According to one embodiment of the present invention, it includes a first blade seat, a rotating shaft and a blade holder, the first blade seat is arranged on the driving assembly, the rotating shaft is fixedly connected to the first blade seat, one end of the blade holder is sleeved and rotatably connected to the rotating shaft, and the first blade is arranged on the blade holder.

[0014] According to an embodiment of the present invention, the tool holder is provided with a mounting plate, the first blade is mounted on the mounting plate, the rotating shaft is arranged along the length direction of the second blade and parallel thereto, and the mounting plate is inclined with respect to the rotating shaft.

[0015] According to an embodiment of the present invention, the inclination angle between the mounting plate and the rotating shaft is 0-1 degree.

[0016] According to one embodiment of the present invention, a cantilever is provided at one end of the tool holder away from the first blade, two ends of the elastic member are respectively connected to the cantilever and the first tool seat, the elastic member applies the elastic force to the cantilever, and the cantilever drives the tool holder to rotate around the rotating axis.

[0017] According to an embodiment of the present invention, it includes a second knife seat arranged on the driving assembly, and the second blade is arranged on the second knife seat.

[0018] According to an embodiment of the present invention, the second blade seat is provided with a mounting bevel inclined toward the first blade, and the second blade is mounted on the mounting bevel.

[0019] According to an embodiment of the present invention, the driving assembly is a two-finger parallel air gripper, and the first tool holder and the second blade are respectively arranged on two claws of the two-finger parallel air gripper.

[0020] According to an embodiment of the present invention, the elastic member is a spring.

[0021] According to an embodiment of the present invention, the limiting member is a guide bar fixed to the first blade, and the other end of the guide bar abuts against an end surface of the second blade.

[0022] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0023] (1) In the embodiment of the present invention, a first blade, a second blade, a first blade seat, a driving assembly, an elastic member and a limit member are provided. The first blade and the second blade are inclined so that they are in point contact during shearing, and the two ends of the first blade in the length direction are respectively located on both sides of the second blade in the thickness direction of the second blade, so that the first blade and the second blade will abut against each other during shearing. Under the action of the abutting reaction force, the first blade overcomes the elastic force and rotates in the opposite direction, so that one end of the first blade gradually moves toward the other side of the second blade to complete the shearing. The first blade rotates during the shearing process so that the first blade and the second blade continuously adjust the position and gap between the two blades, thereby achieving the purpose of automatically adjusting the position and the gap between the blades, so as to achieve zero failure and maintenance-free. In addition, during the shearing process, the first blade and the second blade are always in close contact with each other through the elastic member, so that a good shearing effect is always maintained.

[0024] (2) In the embodiment of the present invention, the rotating shaft is arranged along the length direction of the second blade and is parallel to it, and the mounting plate is inclined with respect to the rotating shaft so that the two ends of the first blade are respectively located on both sides of the second blade in the thickness direction of the second blade.

[0025] (3) In the embodiment of the present invention, the second blade holder is provided with a mounting bevel inclined toward the first blade, and the second blade is mounted on the mounting bevel, so that the contact area between the first blade and the second blade can be reduced during shearing, thereby reducing friction and lightening the load, and also making the cut of the sheared object smooth and burr-free.

[0026] (4) In the embodiment of the present invention, the limiting member is a guide strip fixedly mounted on the first blade, and the other end of the guide strip abuts against one end surface of the second blade. The guide strip can not only limit the position of the first blade, but also play a guiding role during the shearing process, making the shearing smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0028] Figure 1 It is an overall front view of a shearing mechanism capable of automatically adjusting the position of a blade according to the present invention;

[0029] Figure 2 It is an overall side view of a shearing mechanism capable of automatically adjusting the position of a blade according to the present invention;

[0030] Figure 3 A front view of a first blade of a shearing mechanism capable of automatically adjusting the blade position of the present invention;

[0031] Figure 4 A shearing mechanism capable of automatically adjusting the position of a blade according to the present invention Figure 3 Section view at AA;

[0032] Figure 5 A front view of a second blade of a shearing mechanism capable of automatically adjusting the blade position according to the present invention;

[0033] Figure 6 A side view of a second blade of a shearing mechanism capable of automatically adjusting the blade position of the present invention;

[0034] Figure 7 It is a front view of a first blade holder of a shearing mechanism capable of automatically adjusting the blade position of the present invention;

[0035] Figure 8 It is a side view of a first blade holder of a shearing mechanism capable of automatically adjusting the blade position of the present invention;

[0036] Fig. 9 A schematic diagram of a rotating shaft of a shearing mechanism capable of automatically adjusting the position of a blade according to the present invention;

[0037] Fig.10 A schematic diagram of a retaining ring of a shearing mechanism capable of automatically adjusting the position of a blade according to the present invention;

[0038] Fig.11 It is a front view of a knife holder of a shearing mechanism capable of automatically adjusting the position of a blade according to the present invention;

[0039] Fig.12 A side view of a blade holder of a shearing mechanism capable of automatically adjusting the position of a blade according to the present invention;

[0040] Fig.13 A shearing mechanism capable of automatically adjusting the position of a blade according to the present invention Fig.12 Sectional view at BB;

[0041] Fig.14 It is a front view of a second blade holder of a shearing mechanism capable of automatically adjusting the blade position of the present invention;

[0042] Fig.15 A top view of a second blade holder of a shearing mechanism capable of automatically adjusting the blade position according to the present invention;

[0043] Fig.16 The figure is a side view of a second blade holder of a shearing mechanism capable of automatically adjusting the blade position of the present invention.

[0044] Description of reference numerals:

[0045] 1: first blade; 2: second blade; 3: first blade edge; 4: second blade edge; 5: first blade holder; 6: tool holder; 7: rotating shaft; 8: mounting plate; 9: cantilever; 10: second blade holder; 11: mounting bevel; 12: two-finger parallel air gripper; 13: spring; 14: guide strip; 15: retaining ring; 16: rotating shaft mounting threaded hole; 17: mounting hole; 18: mounting arm; 19: lug. DETAILED DESCRIPTION

[0046] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0047] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0048] See also Figures 1 to 16 The core of the present invention is to provide a shearing mechanism that can automatically adjust the position of the blade, including a first blade 1, a second blade 2, a driving assembly, an elastic member and a limit member. The first blade 1 is provided with a first blade 3; the second blade 2 is provided with a second blade 4, the first blade 3 and the second blade 4 are inclined, and in the initial state, the two ends of the first blade 3 in the length direction are respectively located on both sides of the second blade 4 in the thickness direction of the second blade 2; the first blade holder 5 and the second blade 2 are both provided in the driving assembly, the first blade 1 is connected to the driving assembly by rotating along the central axis in the length direction of the second blade 4, the driving assembly drives the first blade holder 5 and / or the second blade 2, so that the first blade 1 and the second blade 2 are close to each other for shearing; the elastic member applies an elastic force to the first blade 1 to rotate toward the second blade 2; the limit member limits the further rotation of the first blade 1 in the initial state by the elastic force.

[0049] During shearing, the first blade 3 and the second blade 4 abut against each other, and under the action of the abutting reaction force, the first blade 1 overcomes the elastic force and rotates in the opposite direction, so that one end of the first blade 3 gradually moves to the other side of the second blade 4 to complete the shearing.

[0050] The first blade 3 and the second blade 4 are inclined so that they are in point contact during shearing, and the two ends of the first blade 3 in the length direction are respectively located on both sides of the second blade 4 in the thickness direction of the second blade 2, so that the first blade 3 and the second blade 4 will abut against each other during shearing, and under the action of the abutting reaction force, the first blade 1 overcomes the elastic force and rotates in the opposite direction, so that one end of the first blade 3 gradually moves to the other side of the second blade 4 to complete the shearing. The first blade 1 rotates during the shearing process so that the first blade 3 and the second blade 4 continuously adjust the position and gap between the two, achieving the purpose of automatically adjusting the position and the gap between the blades, so as to achieve zero trouble and maintenance-free. In addition, during the shearing process, the first blade 1 and the second blade 2 are always in close contact with each other through the elastic member, so that a good shearing effect is always maintained.

[0051] The shearing mechanism capable of automatically adjusting the blade position of the present invention is described in detail below:

[0052] See also Figures 3 to 6 The first blade 1 and the second blade 2 are both in sheet shape, the first blade 1 is located above the second blade 2, and the lower part of the first blade 1 is provided with a first cutting edge 3, see Figure 4 The first blade 3 has an angle of 15 degrees, that is, the angle between the first blade 3 and the side of the first blade 1 is 105 degrees. The upper part of the second blade 2 is provided with a second blade 4, see Figure 6 , the second blade 4 also has an angle of 15 degrees, that is, the angle between the second blade 4 and the side of the second blade 2 is 105 degrees. The 15-degree angle between the first blade 3 and the second blade 4 makes the blade sharper and easier to cut. The shearing mechanism capable of automatically adjusting the blade position in this embodiment is used in a fully automatic wrapped fuse welding machine, mainly for shearing water-soluble tapes. Since the tape is sticky, the 15-degree angle between the first blade 3 and the second blade also helps prevent the blades from sticking.

[0053] See also Figure 1 , Figure 3 , the first blade 3 is tilted relative to the horizontal direction, and the tilt angle in this embodiment is 5 degrees, that is, the right end of the first blade 3 is closer to the second blade 4 than the left end thereof. Figure 1 From the main viewing angle, the first blade 3 and the second blade 4 are inclined so that they are in point contact during shearing.

[0054] In this embodiment, the driving component is a two-finger parallel air gripper 12, which is a pneumatic standard part. The two-finger parallel air gripper 12 has two claws that can move toward each other. The maximum opening stroke distance of the two claws is 30 mm. The two claws are respectively provided with a first tool seat 5 and a second tool seat 10. Figure 8 , Fig.14The first tool holder 5 and the second tool holder 10 are both provided with a "U"-shaped mounting groove, and the claw head is in a square shape. The two claw heads are respectively embedded in the mounting grooves of the first tool holder 5 and the second tool holder 10, and then fixed by two M8 bolts. The purpose of the embedded mounting method is to make the first tool holder 5 and the second tool holder 10 fit firmly on the two-finger parallel air gripper 12, easy to assemble, and maintain straightness with the claw head. The use of the two-finger parallel air gripper 12 makes the overall structure compact, can continuously realize the two symmetrical actions of opening and closing, and has a large opening degree.

[0055] The second blade holder 10 further extends a mounting arm 18, on which a mounting bevel 11 inclined toward the first blade 1 is disposed, that is, the mounting bevel 11 is inclined toward the side of the first blade 1 as a whole, see Fig.14 In this embodiment, the inclination angle of the mounting bevel 11 is 5 degrees, that is, the angle between the mounting bevel 11 and the vertical direction is 5 degrees. The second blade 2 is mounted on the mounting bevel 11, see Figure 2 That is to say, the second blade 2 is tilted toward the first blade 1 as a whole, so that the contact area between the first blade 1 and the second blade 2 can be reduced during shearing to reduce friction and reduce the load of the two-finger parallel air gripper 12. It can also make the cut of the sheared object smooth and burr-free to prevent the blade from sticking. Two M5 threaded holes are also provided on the mounting bevel 11 for mounting the second blade 2.

[0056] The first knife seat 5 is threadedly connected with a rotating shaft 7. Specifically, the first knife seat 5 is provided with a rotating shaft installation threaded hole 16. One end of the rotating shaft 7 is provided with an external thread. The rotating shaft 7 is threaded into the rotating shaft installation threaded hole 16 to complete the installation. The threaded connection makes installation and disassembly convenient. The rotating shaft 7 is arranged along the length direction of the second blade 4 and is parallel to it. That is to say, the rotating shaft 7 is also parallel to the second blade 2. A knife holder 6 is sleeved on the rotating shaft 7. Fig.11 , 12 , 13, a cantilever 9 and a lug 19 are respectively provided at both ends of the upper part of the tool holder 6, and a mounting hole 17 is respectively provided on the cantilever 9 and the lug 19, and the rotating shaft 7 is installed in the two mounting holes 17 and has an interference fit with the mounting holes 17.

[0057] A retaining ring 15 is also sleeved on the rotating shaft 7 and fixed on the rotating shaft 7 with a set screw. The retaining ring 15 is used to fix the rotating shaft 7 on the tool holder 6 to prevent its axial movement, and the retaining ring 15 is located on the side of the lug 19 away from the cantilever 9.

[0058] The cantilever 9 is arranged at one end of the tool holder 6 away from the first blade 1, one end of the elastic member is connected to the end of the cantilever 9 away from the tool holder 6, and the other end is connected to the first tool holder 5. In this embodiment, the elastic member is a spring 13, so a corresponding arc groove is provided at the connection between the cantilever 9 and the spring 13 to fix the spring 13. That is to say, the spring 13 applies an elastic force to tighten the cantilever 9, and the elastic force of the spring 13 and the force arm from the cantilever 9 to the rotating shaft 7 generate a torque on the tool holder 6, so that the cantilever 9 drives the tool holder 6 to rotate around the rotating shaft 7.

[0059] The lower end of the tool holder 6 is provided with a mounting plate 8, and the mounting plate 8 is inclined with respect to the rotating shaft 7. In this embodiment, the inclination angle between the mounting plate 8 and the rotating shaft 7 is 0-1 degrees. The first blade 1 is mounted on the mounting plate 8 by bolts. Since the mounting plate 8 is inclined with respect to the rotating shaft 7, the first blade 1 is inclined with respect to the rotating shaft 7, and the first blade 3 is also inclined with respect to the rotating shaft 7. Since the second blade 4 is parallel to the rotating shaft 7, the first blade 3 and the second blade 4 are in a Figure 1 In a top view, they are also inclined with an angle of 0-1 degree, that is, the two ends of the first blade 3 in the length direction are respectively located on both sides of the second blade 4 in the thickness direction of the second blade 2. Overall, the first blade 3 and the second blade 4 are staggered and inclined with each other.

[0060] After the shearing is completed, when the two ends of the first blade 3 in the length direction are located on the same side of the second blade 4 , the angle through which the first blade 1 rotates is exactly the inclination angle of the mounting plate 8 and the rotating shaft 7 .

[0061] The limiting member is a guide strip 14 fixed to the first blade 1, see Figure 1 , Figure 3 The guide strip 14 is disposed at one end of the first blade 1 in the length direction, and the other end of the guide strip 14 abuts against one end surface of the second blade 2, so that the knife holder 6 is restricted to a certain position, that is, the initial position when the first blade 1 and the second blade 2 are separated and the shearing has not started, so that the spring 13 can no longer further drive the knife holder 6 to rotate toward the second blade 2. At the same time, the guide strip 14 here also plays a guiding role, making the shearing smoother.

[0062] That is to say, under the action of the elastic force of the spring 13, the first blade 1 is closely attached to the second blade 2 through the guide strip 14, so that the first blade 1 and the second blade 2 always maintain a reasonable gap during shearing, and the first blade 1 and the second blade 2 will automatically reset through the force of the spring 13 after shearing is completed, and there is no need to frequently adjust the gap between the two, thus achieving the purpose of automatically adjusting the gap. And when the object to be sheared is too hard, the first blade 1 can overcome the elastic force of the spring 13 through the reaction force and further rotate, so that the first blade 3 leaves the surface of the object, protecting the first blade 1 and the second blade 2 from damage.

[0063] The working process of the present invention is further described below:

[0064] First, start the two-finger parallel air gripper 12, which is driven by compressed air of about 0.5Mpa. The compressed air pushes the piston, and the piston connecting rod drives the two claws to move parallel to each other in the track, driving the first tool holder 5 and the second tool holder 10 to move toward each other, so that the first blade 1 and the second blade 2 move toward each other to start shearing.

[0065] When the first blade 1 and the second blade 2 are close to a certain position, the first blade 3 and the second blade 4 contact each other and start shearing, and the two are in point contact. The contact generates a reaction force between the first blade 3 and the second blade 4, so that the first blade 1 overcomes the elastic force of the spring 13 and generates an adaptive small angle rotation around the rotation axis 7. The spring 13 is further stretched. As the shearing continues, the contact point of the first blade 3 and the second blade 4 gradually moves from right to left to complete the shearing. And as the spring 13 becomes longer and longer, the elastic force generated becomes larger and larger, that is, the shearing force gradually increases from small to large during shearing, so as to cut the object.

[0066] After the shearing is completed, the two-finger parallel air gripper 12 drives in the reverse direction to move the first blade 1 and the second blade 2 to the initial position. During the movement, the first blade 1 is gradually rotated to the initial position by the elastic force of the spring 13 and is closely attached to the second blade 2 through the guide strip 14.

[0067] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A shearing mechanism capable of automatically adjusting the position of a blade, characterized in that: include: A first blade having a first cutting edge; A second blade is provided with a second cutting edge, wherein the first cutting edge is inclined relative to the second cutting edge; And in the initial state, the two ends of the first blade in the length direction are respectively located on the two sides of the second blade in the thickness direction of the second blade; A driving assembly, wherein the first blade and the second blade are both arranged on the driving assembly, the first blade is connected to the driving assembly by rotating along a central axis along the length direction of the second blade, and the driving assembly drives the first blade and / or the second blade to bring the two blades close to each other for shearing; an elastic member, applying an elastic force to the first blade to make it rotate; a limiter to limit further rotation of the first blade in the initial state by the elastic force; During shearing, the first blade and the second blade abut against each other, and under the action of the abutting reaction force, the first blade overcomes the elastic force and rotates in the opposite direction, so that one end of the first blade gradually moves toward the other side of the second blade to complete the shearing; It comprises a first knife seat, a rotating shaft and a knife holder, wherein the first knife seat is arranged on the driving assembly, the rotating shaft is fixedly connected to the first knife seat, one end of the knife holder is sleeved and rotatably connected to the rotating shaft, and the first blade is arranged on the knife holder; The limiting member is a guide bar fixedly arranged on the first blade, and the other end of the guide bar abuts against an end surface of the second blade.

2. The shearing mechanism capable of automatically adjusting the blade position according to claim 1, characterized in that: The tool holder is provided with a mounting plate, the first blade is mounted on the mounting plate, the rotating shaft is arranged along the length direction of the second blade and is parallel to the second blade, and the mounting plate is inclined with the rotating shaft.

3. The shearing mechanism capable of automatically adjusting the blade position according to claim 2, characterized in that: The inclination angle between the mounting plate and the rotating shaft is 0-1 degree.

4. The shearing mechanism capable of automatically adjusting the blade position according to claim 1, characterized in that: A cantilever is provided at one end of the tool holder away from the first blade, and two ends of the elastic member are respectively connected to the cantilever and the first tool holder. The elastic member applies the elastic force to the cantilever, and the cantilever drives the tool holder to rotate around the rotating shaft.

5. The shearing mechanism capable of automatically adjusting the blade position according to claim 1, characterized in that: It comprises a second knife seat arranged on the driving assembly, and the second blade is arranged on the second knife seat.

6. The shearing mechanism capable of automatically adjusting the blade position according to claim 5, characterized in that: The second blade seat is provided with a mounting bevel inclined toward the first blade, and the second blade is mounted on the mounting bevel.

7. The shearing mechanism capable of automatically adjusting the blade position according to claim 1, characterized in that: The driving component is a two-finger parallel air gripper, and the first tool holder and the second blade are respectively arranged on two claws of the two-finger parallel air gripper.

8. The shearing mechanism capable of automatically adjusting the blade position according to claim 1, characterized in that: The elastic member is a spring.

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