Vertical pushing rotary swing type cam shearing mechanism

Abstract

The utility model discloses an up-and-down material pushing rotary swing type cam material shearing mechanism, which relates to the technical field of material shearing, and comprises a mould box and a platform, the front end of the mould box is provided with a shear template, the front part of the shear template is provided with a shear protection plate through a double-end stud, the rear end of the shear protection plate is rotatably provided with a shear eccentric shaft, and the shear eccentric shaft is provided with an eccentric shaft. A shear plate is installed on the outer wall of the shear eccentric shaft between the shear template and the shear plate, the shearing device further comprises an ejector rod pushing the shear plate to deviate, a cutting rocker arm and a cutting cam, the cutting rocker arm and the cutting cam drive the ejector rod to move up and down, an air cylinder is installed on one side of the table, and a protection plate reset spring is installed at the output end of the air cylinder. An abutting rod is installed at the end, close to the shear plate, of the protection plate reset spring. A sliding plate type cam is replaced by the circular motion cam, the motion speed of the cam can be increased, shearing is smooth, compared with a connecting rod eccentric wheel mechanism, the circular motion mechanism is stable in motion, small in inertia and high in precision, and scissor components are independent in structure and convenient to detach and adjust off the machine.

Description

Technical Field

[0001] This utility model relates to the field of material shearing technology, specifically to a top-and-bottom pushing and swinging cam shearing mechanism. Background Technology

[0002] Early material shearing relied heavily on manual operation, resulting in high labor intensity for workers and difficulty in guaranteeing shearing accuracy due to human factors. This led to low production efficiency and an inability to meet the demands of large-scale industrial production. Later, some simple mechanical shearing devices emerged, often employing fixed cutters and simple transmissions. These devices could only shear materials of single, regular shapes, lacking flexibility. Therefore, a top-and-bottom pushing, oscillating cam shearing mechanism was needed. This cam mechanism can convert the continuous motion of the driving component into the complex motion of the driven component according to predetermined requirements, precisely controlling parameters such as stroke, speed, and acceleration. In the development of mechanical automation, it has gradually been widely applied to various types of equipment.

[0003] When the linkage eccentric wheel mechanism is in use, the eccentric wheel's motion trajectory is a non-circular curve, which generates a large inertial force and vibration during operation. In high-speed operation or in applications with high precision requirements, this can affect product quality and service life. For example, when used for precision parts machining, the vibration may lead to insufficient machining accuracy.

[0004] When in use, sliding cams are limited by factors such as material strength, lubrication conditions, and structural design. They have a speed limit; exceeding this speed will lead to increased wear, damage to parts, and even mechanism failure. Utility Model Content

[0005] The purpose of this invention is to provide a top-and-bottom pushing swivel cam shearing mechanism to solve the problems of poor motion stability of the connecting rod eccentric wheel mechanism and insufficient speed of the sliding plate cam mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a top-bottom pushing rotary cam shearing mechanism, including a mold box and a platform, wherein a shearing template is installed at the front end of the mold box, and a shear guard plate is installed at the front of the shearing template through a double-headed stud, and a shear eccentric shaft is rotatably installed at the rear end of the shear guard plate, and a shear plate is installed on the outer wall of the shear eccentric shaft between the shearing template and the shear plate, and further includes a push rod that pushes the shear plate to deflect it, and a cutting rocker arm and a cutting cam that drive the push rod to move up and down;

[0007] A cylinder is installed on one side of the platform, and a guard plate return spring is installed at the output end of the cylinder. A stop rod is installed at the end of the guard plate return spring near the scissor plate. A guide sleeve is provided inside the mold box. A top rod is provided inside the guide sleeve. A cutting rocker arm is provided below the platform. A rocker arm return spring is installed between the platform and the cutting rocker arm. A cutting cam is provided below the cutting rocker arm.

[0008] Preferably, the rear end of the eccentric shaft of the scissors passes through the scissor plate and the scissor template in sequence and extends into the interior of the mold box, and the eccentric shaft of the scissors is rotatably installed inside the mold box.

[0009] Preferably, the top end of the top rod abuts against the bottom end of the scissor plate, and the abutting rod abuts against one side of the scissor plate.

[0010] Preferably, the bottom end of the top rod extends above the cutting rocker arm, and the bottom end of the top rod is in contact with the cutting rocker arm.

[0011] Preferably, the outer diameter of the push rod is smaller than the inner diameter of the guide sleeve, and the push rod can move inside the guide sleeve.

[0012] Preferably, the cutting rocker arm above the cutting cam is rotatably mounted on one side of the platform, and the bottom end of the cutting cam abuts against each other.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The cutting cam is rotated by a motor, and the rotation of the cutting cam pushes the cutting rocker arm, which in turn pushes the top rod, causing the top rod to move upward inside the guide sleeve and compressing the rocker arm return spring. The top rod then pushes the shear plate, causing the shear plate to deviate from the shearing template, and the shear plate cuts the workpiece. If it is necessary to disassemble the shear component, the cylinder can be restarted to retract the telescopic end of the cylinder, causing the abutment rod to disengage from the shear plate, making it easy to remove the shear component. This structure uses a circular motion cam instead of a sliding plate cam, which can improve the cam movement speed and cut the material evenly. The circular motion mechanism is more stable, has less inertia, and higher precision than the linkage eccentric wheel mechanism. Moreover, the shear component has an independent structure, which is convenient for disassembly and off-machine adjustment. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the mold box of this utility model;

[0015] Figure 2 This is a three-dimensional structural diagram of the shear template and shear plate of this utility model;

[0016] Figure 3 This is a schematic diagram of the front sectional view of the present invention;

[0017] Figure 4 This is a side sectional view of the present invention.

[0018] Figure 5 This is a top sectional view of the shear template and shear guard plate of this utility model;

[0019] Figure 6 This is a top sectional view of the present invention.

[0020] In the diagram: 1. Mold box; 2. Shearing template; 3. Shearing plate; 4. Shear guard plate; 5. Guide sleeve; 6. Ejector rod; 7. Main unit; 8. Cutting rocker arm; 9. Cutting cam; 10. Rocker arm return spring; 11. Cylinder; 12. Guard plate return spring; 13. Abutment rod; 14. Shearing eccentric shaft. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1: Please refer to Figure 1-6 A top-and-bottom pushing swivel cam shearing mechanism includes a mold box 1 and a base 7. A shearing template 2 is installed at the front end of the mold box 1, and a shear guard plate 4 is installed at the front of the shearing template 2 through a double-headed stud. A shear eccentric shaft 14 is rotatably installed at the rear end of the shear guard plate 4, and a shear plate 3 is installed on the outer wall of the shear eccentric shaft 14 between the shearing template 2 and the shear plate 3. The mechanism also includes a push rod 6 that pushes the shear plate 3 to deflect it, and a cutting rocker arm 8 and a cutting cam 9 that drive the push rod 6 to move up and down.

[0023] A cylinder 11 is installed on one side of this platform 7, and a guard plate return spring 12 is installed at the output end of the cylinder 11. A stop rod 13 is installed at the end of the guard plate return spring 12 near the scissor plate 3. A guide sleeve 5 is provided inside the mold box 1. A push rod 6 is provided inside the guide sleeve 5. A cutting rocker arm 8 is provided below this platform 7. A rocker arm return spring 10 is installed between this platform 7 and the cutting rocker arm 8. A cutting cam 9 is provided below the cutting rocker arm 8.

[0024] Specifically, such as Figure 4 As shown, the cutting rocker arm 8 above the cutting cam 9 is rotatably mounted on one side of the unit 7. The bottom end of the cutting cam 9 and the cutting rocker arm 8 abut against each other. In use, the cutting cam 9 is connected to the output end of the motor, and the motor makes the cutting cam 9 rotate. The rotation of the cutting cam 9 pushes the cutting rocker arm 8.

[0025] Specifically, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the top end of the push rod 6 abuts against the bottom end of the shear plate 3, and the abutting rod 13 abuts against one side of the shear plate 3. The bottom end of the push rod 6 extends above the cutting rocker arm 8, and the bottom end of the push rod 6 contacts the cutting rocker arm 8. The outer diameter of the push rod 6 is smaller than the inner diameter of the guide sleeve 5, and the push rod 6 can move inside the guide sleeve 5. When in use, the cutting rocker arm 8 pushes the push rod 6, causing the push rod 6 to move upward inside the guide sleeve 5, and compressing the rocker arm return spring 10, thereby pushing the shear plate 3 through the push rod 6.

[0026] Specifically, such as Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the rear end of the eccentric shaft 14 passes through the scissor plate 3 and the shear template 2 in sequence and extends into the interior of the mold box 1. The eccentric shaft 14 is rotatably installed inside the mold box 1. In use, the scissor plate 3 is pushed by the top rod 6. The scissor plate 3 rotates with the eccentric shaft 14 as the base point. The scissor plate 3 is offset from the shear template 2, and the workpiece is cut by the scissor plate 3.

[0027] Working principle: The operator inserts the workpiece to be processed into the cavity where the mold box 1, the shearing template 2, and the shear plate 3 overlap. Then, the operator starts the cylinder 11, extending its telescopic end. The telescopic end of the cylinder 11 pushes the guard plate return spring 12, which in turn pushes the abutment rod 13, causing the abutment rod 13 to abut against the shear plate 3. The operator then starts the motor that drives the cutting cam 9, causing it to rotate. The rotation of the cutting cam 9 pushes the cutting rocker arm 8, which in turn pushes the top rod 6. The top rod 6 moves upward inside the guide sleeve 5, compressing the rocker arm return spring 10. The top rod 6 pushes the shear plate 3, causing it to shift away from the shearing template 2. The shear plate 3 then cuts the workpiece. If the shear assembly needs to be disassembled, the operator can start the cylinder 11 again, retracting its telescopic end to disengage the abutment rod 13 from the shear plate 3, making it easy to remove the shear assembly.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A top-and-bottom pushing rotary cam shearing mechanism, comprising a mold box (1) and a platform (7), wherein a shearing template (2) is installed at the front end of the mold box (1), and a shear guard plate (4) is installed at the front part of the shearing template (2) via a double-headed stud, and a shear eccentric shaft (14) is rotatably installed at the rear end of the shear guard plate (4), and a shear plate (3) is installed on the outer wall of the shear eccentric shaft (14) between the shearing template (2) and the shear plate (3), characterized in that: It also includes a push rod (6) that pushes the shear plate (3) to deflect it, and a cutting rocker arm (8) and a cutting cam (9) that drive the push rod (6) to move up and down; A cylinder (11) is installed on one side of the platform (7), and a guard plate return spring (12) is installed at the output end of the cylinder (11). A retaining rod (13) is installed at the end of the guard plate return spring (12) near the scissor plate (3). A guide sleeve (5) is provided inside the mold box (1). A top rod (6) is provided inside the guide sleeve (5). A cutting rocker arm (8) is provided below the platform (7). A rocker arm return spring (10) is installed between the platform (7) and the cutting rocker arm (8). A cutting cam (9) is provided below the cutting rocker arm (8).

2. The upper and lower pusher oscillating cam shearing mechanism according to claim 1, characterized in that: The rear end of the scissor eccentric shaft (14) passes through the scissor plate (3) and the scissor template (2) in sequence and extends into the interior of the mold box (1), and the scissor eccentric shaft (14) is rotatably installed inside the mold box (1).

3. The upper and lower pusher oscillating cam shearing mechanism according to claim 1, characterized in that: The top end of the top rod (6) abuts against the bottom end of the scissor plate (3), and the abutting rod (13) abuts against one side of the scissor plate (3).

4. The upper and lower pusher swing cam shearing mechanism according to claim 1, characterized in that: The bottom end of the top rod (6) extends above the cutting rocker arm (8), and the bottom end of the top rod (6) is in contact with the cutting rocker arm (8).

5. The upper and lower pusher swing cam shearing mechanism according to claim 1, characterized in that: The outer diameter of the top rod (6) is smaller than the inner diameter of the guide sleeve (5), and the top rod (6) can move inside the guide sleeve (5).

6. The upper and lower pusher swing cam shearing mechanism according to claim 1, characterized in that: The cutting rocker arm (8) above the cutting cam (9) is rotatably mounted on one side of the platform (7), and the bottom end of the cutting cam (9) and the cutting rocker arm (8) abut against each other.

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