Hydraulic shearing device using oil cylinder piston as guide mechanism

Abstract

The utility model discloses a hydraulic shearing device using an oil cylinder piston as a guide mechanism, and relates to the technical field of hydraulic shearing equipment. The device comprises an oil cylinder, a piston rod is arranged on one side of the oil cylinder, a tool rest base is arranged on one side of the oil cylinder and located on the outer side of the piston rod, a sliding guide sleeve is arranged in an inner cavity of the tool rest base, the bottom of the sliding guide sleeve is fixedly connected with an upper pressing plate through a bolt, and a grease nipple is arranged at the bottom of the upper pressing plate. One end of the piston rod is fixedly connected with a movable tool apron, one side of an inner cavity of the tool rest base is fixedly connected with a limiting block, and the sides, opposite to the movable tool apron, of the limiting block are fixedly connected with cutters. The oil cylinder and the piston rod serve as guiding elements of the shearing mechanism at the same time, the structure is simplified by more than 30%, functions are integrated, the piston guiding function and the hydraulic driving function are integrated, the piston guiding structure is an integrated piston guiding structure, the piston rod is provided with a precise guiding section, and guiding precision and stability are greatly improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydraulic shearing equipment, and in particular relates to a hydraulic shearing device that uses the piston of the oil cylinder itself as a guiding mechanism. Background Technology

[0002] Hydraulic shears, as an important shearing tool, are widely used in many fields such as industry, metallurgy, construction, and rescue. Their working principle is to drive the piston and piston rod through the pressure generated by the hydraulic system, which in turn drives the shearing blade to shear the material.

[0003] However, existing hydraulic shearing devices are bulky, and the separation of the guide column from the shearing cylinder leads to a complex structure. The additional guide column and bracket increase the size of the equipment by more than 30%, resulting in poor guiding accuracy and stability. Long-term friction between the guide column and the bearing creates gaps, and after long-term use, the shearing error exceeds ±0.5mm. When the workpiece is placed off-center, the guide column on one side will be overloaded and deformed. Maintenance costs are high: the guide column needs to be made of high-hardness alloy steel, which is expensive and easily worn. After wear, it needs to be replaced as a whole. Regular lubrication is required, and the lubrication point is often inside the equipment. The protective cover must be removed to add lubricating oil, which is a cumbersome process.

[0004] To address this issue, we provide a hydraulic shearing device that utilizes the piston of a hydraulic cylinder itself as a guiding mechanism. Utility Model Content

[0005] The purpose of this invention is to provide a hydraulic shearing device that uses the piston of the oil cylinder itself as a guiding mechanism. Through the cooperation of the oil cylinder, piston rod and sliding guide sleeve, it solves the problems of bulky structure, complex structure caused by the separation of the guide column and the shearing oil cylinder in the existing hydraulic shearing device, and poor guiding accuracy and stability.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a hydraulic shearing device that uses the piston of a hydraulic cylinder as a guiding mechanism. It includes a hydraulic cylinder, a piston rod on one side of the cylinder, a blade holder on one side of the cylinder and outside the piston rod, a sliding guide sleeve in the inner cavity of the blade holder, an upper pressure plate fixedly connected to the bottom of the sliding guide sleeve by bolts, a grease fitting at the bottom of the upper pressure plate, a movable blade holder fixedly connected to one end of the piston rod, a limit block fixedly connected to one side of the inner cavity of the blade holder, and cutting blades fixedly connected to the side of the limit block opposite to the movable blade holder.

[0008] The present invention is further configured such that an oil inlet is provided on the rear side of one side of the oil cylinder, and an oil outlet is provided on the front side of one side of the oil cylinder. Oil enters through the oil inlet, causing the piston rod of the oil cylinder to move forward along the sliding guide sleeve, so that the cutter can close in coordination to achieve force shearing on the workpiece. Oil exits through the oil outlet, so that the piston rod returns to its initial state.

[0009] The present invention is further configured such that the surface of the oil cylinder is provided with mounting bolts, and the surface of the tool holder is provided with bolt holes for use with the mounting bolts, so that one side of the oil cylinder is in contact with the tool holder, and the mounting bolts are screwed into the bolt holes on the surface of the tool holder, thereby installing the tool holder on one side of the oil cylinder, and making it convenient to disassemble later.

[0010] The present invention is further configured such that the surface of the upper pressure plate is provided with a fastening bolt, the top of the fastening bolt is threadedly connected to the mounting hole at the bottom of the sliding guide sleeve, and the fastening bolt on the surface of the upper pressure plate is screwed into the mounting hole on the surface of the sliding guide sleeve by one end, thereby locking the sliding guide sleeve by the upper pressure plate, and it can be disassembled later.

[0011] The present invention is further configured such that mounting bolts are provided at the top and bottom of one side of the tool holder, one end of the mounting bolt is threaded to the bolt hole on the surface of the limiting block, and the mounting bolt is screwed into the bolt hole on the surface of the limiting block to install the limiting block at the front of the tool holder, which is convenient for disassembly later.

[0012] The present invention is further provided with a sealing plug in the inner cavity of both the oil inlet and the oil outlet. The sealing plug is made of synthetic rubber and can seal and protect the oil inlet and the oil outlet. Removing the sealing plug will allow the oil passage in the inner cavity of the oil cylinder to be unobstructed.

[0013] The present invention is further configured such that a through hole is provided on one side of the tool holder, the size of which is adapted to the size of the piston rod. The piston rod moves in the through hole on the surface of the tool holder under the drive of the oil cylinder, and then applies pressure forward along the sliding guide sleeve, so that the two cutting blades close together.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model uses both the oil cylinder and the piston rod as guiding elements of the shearing mechanism, simplifying the structure by more than 30% and integrating functions. It integrates the piston guiding function with the hydraulic drive function, forming an integrated piston guiding structure. Furthermore, the piston rod is machined with a precision guide section, which greatly improves the guiding accuracy and stability.

[0016] 2. The maintenance cost of this utility model is low and the maintenance difficulty is simplified: the independent guide column is eliminated, and the system hydraulic oil is used to achieve self-lubrication. There is no need to replace the guide sleeve or frequently add lubricating oil. The external lubrication method is adopted, and there is no need to remove the protective cover, making the operation convenient. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 This is a perspective view of a hydraulic shearing device that uses the piston of a hydraulic cylinder as a guiding mechanism.

[0019] Figure 2 This is an exploded structural diagram of a hydraulic shearing device that uses the piston of a hydraulic cylinder as a guiding mechanism.

[0020] Figure 3 This is a bottom view schematic diagram of a hydraulic shearing device that uses the piston of a hydraulic cylinder as a guiding mechanism.

[0021] Figure 4 This is a front view schematic diagram of a hydraulic shearing device that uses the piston of a hydraulic cylinder as a guiding mechanism.

[0022] In the attached diagram: 1. Hydraulic cylinder; 2. Piston rod; 3. Tool holder; 4. Sliding guide sleeve; 5. Upper pressure plate; 6. Grease nipple; 7. Movable tool holder; 8. Limit block; 9. Cutting knife; 10. Oil inlet; 11. Oil outlet. Detailed Implementation

[0023] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example 1

[0025] Please see Figure 1-4 This utility model is a hydraulic shearing device that uses the piston of a hydraulic cylinder as a guiding mechanism. It includes a hydraulic cylinder 1, a piston rod 2 on one side of the hydraulic cylinder 1, a blade holder 3 on one side of the hydraulic cylinder 1 and outside the piston rod 2, a sliding guide sleeve 4 in the inner cavity of the blade holder 3, an upper pressure plate 5 fixedly connected to the bottom of the sliding guide sleeve 4 by bolts, a grease nipple 6 at the bottom of the upper pressure plate 5, a movable blade holder 7 fixedly connected to one end of the piston rod 2, a limit block 8 fixedly connected to one side of the inner cavity of the blade holder 3, and a cutter 9 fixedly connected to the side of the limit block 8 opposite to the movable blade holder 7.

[0026] Specifically: the piston rod 2 is driven by the hydraulic cylinder 1, causing the piston rod 2 of the hydraulic cylinder 1 to move forward along the sliding guide sleeve 4. The piston rod 2 drives the movable knife holder 7 to move, and the movable knife holder 7 drives the cutter 9 to move towards another cutter 9 on one side of the limit block 8, so that the cutter 9 cooperates to close and achieve force shearing on the workpiece.

[0027] Example 2

[0028] Please see Figure 1-4 Based on Embodiment 1, an oil inlet 10 is provided on the rear side of one side of the oil cylinder 1, and an oil outlet 11 is provided on the front side of one side of the oil cylinder 1. Mounting bolts are provided on the surface of the oil cylinder 1. Bolt holes for use with mounting bolts are provided on the surface of the tool holder 3. Fastening bolts are provided on the surface of the upper pressure plate 5. The top of the fastening bolts is threaded to the mounting hole at the bottom of the sliding guide sleeve 4. Mounting bolts are provided on the top and bottom of one side of the tool holder 3. One end of the mounting bolts is threaded to the bolt hole on the surface of the limit block 8. Sealing plugs are provided in the inner cavities of the oil inlet 10 and the oil outlet 11. The sealing plugs are made of synthetic rubber. A through hole is provided on one side of the tool holder 3. The size of the through hole is adapted to the size of the piston rod 2.

[0029] Specifically: Oil enters through the oil inlet 10, causing the piston rod 2 of the hydraulic cylinder 1 to move forward along the sliding guide sleeve 4, which in turn causes the cutter 9 to close and apply force to shear the workpiece. Oil exits through the oil outlet 11, causing the piston rod 2 to return to its initial state, so that one side of the hydraulic cylinder 1 is in contact with the tool holder 3. Tighten the mounting bolts until they are screwed into the bolt holes on the surface of the tool holder 3, thus installing the tool holder 3 on one side of the hydraulic cylinder 1, which facilitates disassembly later. Tighten the fastening bolts on the surface of the upper pressure plate 5 until one end of them is screwed into the mounting hole on the surface of the sliding guide sleeve 4. In this way, the upper pressure plate 5 locks the sliding guide sleeve, which can be disassembled later. Tighten the mounting bolt until one end is screwed into the bolt hole on the surface of the limit block 8, and install the limit block 8 at the front of the tool holder 3. It is easy to disassemble later. The sealing plug can seal and protect the oil inlet 10 and the oil outlet 11. Remove the sealing plug to make the oil passage in the inner cavity of the oil cylinder 1 unobstructed. The piston rod 2 moves in the through hole on the surface of the tool holder 3 under the drive of the oil cylinder 1, and then applies pressure forward along the sliding guide sleeve 4, so that the two cutters 9 close together.

[0030] The working principle of this utility model is as follows: oil is injected into the oil cylinder 1 through the oil inlet 10, and the oil pressure drives the piston rod 2 of the oil cylinder 1 to move forward along the sliding guide sleeve 4. The piston rod 2 drives the movable knife holder 7 to move, and the movable knife holder 7 drives the cutter 9 to move towards another cutter 9 on the side of the limit block 8, so that the cutter 9 cooperates to close and achieve force shearing on the workpiece. Oil is discharged through the oil outlet 11, so that the piston rod 2 returns to the initial state. Lubricating oil is added to the inner cavity of the sliding guide sleeve 4 through the grease nipple 6 to lubricate the surface of the piston rod 2.

[0031] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A hydraulic shearing device that utilizes the piston of a hydraulic cylinder as a guiding mechanism, comprising a hydraulic cylinder (1), characterized in that: A piston rod (2) is provided on one side of the oil cylinder (1). A tool holder (3) is provided on one side of the oil cylinder (1) and outside the piston rod (2). A sliding guide sleeve (4) is provided in the inner cavity of the tool holder (3). An upper pressure plate (5) is fixedly connected to the bottom of the sliding guide sleeve (4) by bolts. A grease nipple (6) is provided at the bottom of the upper pressure plate (5). A movable tool holder (7) is fixedly connected to one end of the piston rod (2). A limit block (8) is fixedly connected to one side of the inner cavity of the tool holder (3). A cutter (9) is fixedly connected to the side of the limit block (8) opposite to the movable tool holder (7).

2. The hydraulic shearing device according to claim 1, which utilizes the piston of the cylinder itself as a guiding mechanism, is characterized in that: An oil inlet (10) is provided on the rear side of one side of the oil cylinder (1), and an oil outlet (11) is provided on the front side of one side of the oil cylinder (1).

3. A hydraulic shearing device using the piston of a hydraulic cylinder as a guiding mechanism according to claim 1, characterized in that: The surface of the oil cylinder (1) is provided with mounting bolts, and the surface of the tool holder (3) is provided with bolt holes for use with the mounting bolts.

4. A hydraulic shearing device using the piston of a hydraulic cylinder as a guiding mechanism according to claim 1, characterized in that: The surface of the upper pressure plate (5) is provided with fastening bolts, and the top of the fastening bolts is threadedly connected to the mounting hole at the bottom of the sliding guide sleeve (4).

5. A hydraulic shearing device using the piston of a hydraulic cylinder as a guiding mechanism according to claim 1, characterized in that: Mounting bolts are provided on the top and bottom of one side of the tool holder (3), and one end of the mounting bolt is threaded to the bolt hole on the surface of the limiting block (8).

6. A hydraulic shearing device using the piston of a hydraulic cylinder as a guiding mechanism according to claim 2, characterized in that: The inner cavities of the oil inlet (10) and the oil outlet (11) are both equipped with sealing plugs, and the sealing plugs are made of synthetic rubber.

7. A hydraulic shearing device using the piston of a hydraulic cylinder as a guiding mechanism according to claim 1, characterized in that: The tool holder (3) has a through hole on one side, and the size of the through hole is adapted to the size of the piston rod (2).

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