Adjustable hydraulic shears and assembly method

Abstract

This invention relates to an adjustable hydraulic shear and its assembly method, comprising a connector connected to a mounting base via a rotary drive device. Hydraulic cylinders are hinged to both sides of the upper end of the mounting base, and a shear seat is hinged to the other end of each cylinder. Shears are mounted on the shear seat, which is hinged to the lower end of the mounting base via a rotating device. The rotating device includes a first and a second pressure sleeve fixed to the front and rear ends of the mounting base to limit the axial movement of the shear seat. Adjustable shims are provided on the contact surfaces between the first and second pressure sleeves and the mounting base. The first and second pressure sleeves are used to press the shear seat. The tightness of the shear seat can be adjusted by increasing or decreasing the thickness of the shims, achieving the optimal fit clearance between the left and right shear seats and improving the hydraulic shearing effect. The adjustable structure of the rotating device allows for adjustment by increasing the thickness of the shims after prolonged use and wear, maintaining optimal operating conditions.

Description

Technical Field

[0001] This invention relates to a hydraulic shear with adjustable tension, belonging to the technical field of shearing equipment. Background Technology

[0002] Hydraulic shears, a common industrial processing cutting tool, are used in conjunction with excavators to achieve rapid shearing. Because hydraulic shears use a hydraulic device as their drive mechanism, they can cut large steel pieces. However, existing hydraulic shears suffer from uneven shearing forces due to the uneven density within the steel. Wear and tear on the shears after use can also cause misalignment, resulting in unstable shearing and reduced shearing efficiency, negatively impacting user experience. Therefore, we propose a hydraulic shear with adjustable shear tension. Summary of the Invention

[0003] The purpose of this invention is to provide a hydraulic shear with adjustable tension to solve the problem mentioned in the background art that the shears are prone to deflection during use, reducing the cutting effect.

[0004] The technical solution of the present invention is as follows:

[0005] A hydraulic shear with adjustable tension includes a connector. The connector is connected to a mounting base via a rotary drive device. Hydraulic cylinders are hinged to both sides of the upper end of the mounting base. A shear seat is hinged to the other end of each hydraulic cylinder. Shears are mounted on the shear seat. The shear seat is hinged to the lower end of the mounting base via a rotating device. The rotating device includes a pressure sleeve (first and second) fixed at the front and rear ends of the mounting base to limit the axial movement of the shear seat. A rotating shaft passes through the pressure sleeve, the shear seat, and the pressure sleeve (second) for rotating the shear seat. A fastening thread is provided at the other end of the rotating shaft, and a fastening nut is installed on the fastening thread. Adjusting shims are provided on the connection surfaces of the pressure sleeves (first and second) and the mounting base.

[0006] The mounting base has a mounting hole at its lower end. The first pressure sleeve is inserted into the mounting hole and fixed to the mounting base with bolts along with the adjusting shim. The outer end of the first pressure sleeve has a stop groove, and the head of the rotating shaft has a stop plate. The stop plate of the rotating shaft is installed in the stop groove to limit the rotation of the rotating shaft. The second pressure sleeve is inserted into the mounting hole and fixed to the mounting base with bolts along with the adjusting shim. The outer end of the second pressure sleeve has a mounting groove with a screw hole. The fastening nut tightens the rotating shaft and then fixes it to the second pressure sleeve with bolts.

[0007] The scissor seat is provided with a through hole for installing a rotating shaft, a spacer is provided inside the through hole, and wear-resistant gaskets are provided at both ends of the through hole.

[0008] A hydraulic rotary joint is provided between the connector and the mounting base. An acceleration valve is provided in the mounting base below the hydraulic rotary joint. The oil inlet pipe and oil return pipe of the hydraulic rotary joint are connected to the acceleration valve pipeline. The acceleration valve is provided with two oil pipes connected to the oil cylinder.

[0009] The rotating shaft has an oil injection hole in the middle, which extends to the outer circle of the rotating shaft, and an oil injection nozzle is installed on the oil injection hole.

[0010] The stop groove provided at the outer end of the pressure sleeve is a square groove, and the stop plate provided at the head of the rotating shaft is a square plate.

[0011] The rotary drive device includes a hydraulic motor and a gear mounted on the mounting base. The hydraulic motor can drive the mounting base to rotate 360 ​​degrees.

[0012] The mounting base has an installation window.

[0013] An assembly method for an adjustable-tension hydraulic shear, comprising the following steps:

[0014] Step 1: Connector design and manufacturing;

[0015] Step Two: Design and fabrication of the rotary drive unit;

[0016] Step 3: Design and fabrication of the mounting base;

[0017] Step 4: Design and fabrication of the scissor seat;

[0018] Step 5: Secure the rotary drive unit to the mounting base with bolts; fix the hydraulic rotary joint to the connector, and fix the connector to the rotary drive unit with bolts;

[0019] Step 6: Hinge the scissor seat onto the mounting base using the rotating device; To install the rotating device, first fix the pressure sleeve one and the adjusting shim onto the mounting base, then fix the pressure sleeve two and the adjusting shim onto the mounting base, and pass the rotating shaft through the pressure sleeve one, the scissor seat, and the pressure sleeve two.

[0020] Step 7: Adjust the tension of the scissors and check if the clearance of the scissor holder is appropriate. If not, adjust by adding or removing shims.

[0021] Step 8: Fix the shaft. Tighten the shaft with the fastening nut, and then fix it to the pressure sleeve 2 with bolts.

[0022] Step 9: Install the hydraulic cylinder. Hinge one end of the hydraulic cylinder to the upper end of the mounting base, and hinge the other end of the hydraulic cylinder to the scissor seat.

[0023] Step 10: Oil circuit installation. Connect the inlet and return oil pipes of the hydraulic rotary joint to the accelerator valve pipeline. The accelerator valve is equipped with two oil pipes connected to the oil cylinder.

[0024] The present invention has the following beneficial effects:

[0025] 1. The scissor seat of the present invention is hinged to the mounting base via a rotating device. The rotating device includes a pressure sleeve 1 and a pressure sleeve 2 fixed at the front and rear ends of the mounting base to limit the axial movement of the scissor seat. Adjusting shims are provided on the connecting surfaces of the pressure sleeve 1 and the pressure sleeve 2 with the mounting base. The pressure sleeve 1 and the pressure sleeve 2 are used to press the scissor seat tightly. The tightness of the scissor seat can be adjusted by increasing or decreasing the thickness of the adjusting shims, and can be adjusted to the optimal fitting clearance between the left and right scissor seats to improve the hydraulic shearing effect. The rotating device adopts an adjustable structure. After long-term use and wear, it can be adjusted by increasing the thickness of the adjusting shims to maintain the best operating condition.

[0026] 2. The scissor holder of the present invention is provided with a spacer and a wear-resistant pad to prevent wear during rotation of the scissor holder and improve the service life of the scissor holder.

[0027] 3. The rotating shaft of the present invention is provided with an oil injection hole and an oil injection nozzle, through which lubricating oil can be injected. The lubricating oil can reduce the friction between the rotating shaft and the scissor seat.

[0028] 4. The hydraulic rotary joint and the accelerator valve of this invention are designed separately, which makes the hydraulic rotary joint and the accelerator valve more impact-resistant and less prone to oil leakage. Attached Figure Description

[0029] Figure 1 This is a schematic view of the structure of the present invention;

[0030] Figure 2 This is an exploded view of the rotating device of the present invention;

[0031] Figure 3 This is a cross-sectional view of the rotating device of the present invention;

[0032] Figure 4 This is a schematic diagram of the scissor holder of the present invention;

[0033] Figure 5 This is a schematic diagram of the adjusting shim structure of the present invention;

[0034] Figure 6 This is a schematic diagram of the second pressure sleeve structure of the present invention;

[0035] Figure 7 This is a schematic diagram of the fastening nut structure of the present invention;

[0036] Figure 8 This is a schematic diagram of the oil circuit installation structure of the hydraulic rotary joint and the accelerator valve of the present invention;

[0037] Figure 9This is an exploded structural diagram of the present invention;

[0038] The reference numerals in the figure are as follows:

[0039] 1-Connector; 2-Rotary drive device; 3-Mounting base; 4-Hydraulic cylinder; 5-Scissor seat; 6-Scissors; 7-Rotating device; 8-Pressure sleeve one; 9-Pressure sleeve two; 10-Rotating shaft; 11-Fastening nut; 12-Adjusting shim; 13-Mounting hole; 14-Stop groove; 15-Stop plate; 16-Mounting groove; 17-Through hole; 18-Spacer; 19-Wear-resistant shim; 20-Hydraulic rotary joint; 21-Accelerator valve; 22-Oil inlet pipe; 23-Oil return pipe; 24-Oil injection hole; 25-Oil injection nozzle; 26-Hydraulic motor; 27-Mounting window. Detailed Implementation

[0040] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0041] like Figures 1 to 9 As shown, an adjustable hydraulic shear includes a quick connector 1 for installation with an excavator. The connector 1 is connected to a mounting base 3 via a rotary drive device 2. Hydraulic cylinders 4 are hinged to both sides of the upper end of the mounting base 3, and a shear seat 5 is hinged to the other end of each cylinder 4. Shears 6 are mounted on the shear seat 5. The shear seat 5 is hinged to the lower end of the mounting base 3 via a rotating device 7. The rotating device 7 includes a pressure sleeve 8 and a pressure sleeve 9 fixed to the front and rear ends of the mounting base 3 to limit the axial movement of the shear seat 5. A rotating shaft 10 passes through the pressure sleeve 8, the shear seat 5, and the pressure sleeve 9 for rotating the shear seat 5. A fastening thread is provided at the other end of the rotating shaft 10, and a fastening nut 11 is installed on the fastening thread. Adjusting shims 12 are provided on the connecting surfaces of the pressure sleeves 8 and 9 with the mounting base 3. The pressure sleeves 8 and 9 are used to press the shear seat 5, and the tightness of the shear seat 5 can be adjusted by adding or removing the adjusting shims 12.

[0042] Furthermore, the lower end of the mounting base 3 is provided with a mounting hole 13. The first pressure sleeve 8 is inserted into the mounting hole 13 and fixed to the mounting base 3 by bolts. The outer end of the first pressure sleeve 8 is provided with a stop groove 14. The head of the rotating shaft 10 is provided with a stop plate 15. The stop plate 15 of the rotating shaft 10 is installed in the stop groove 14 to limit the rotation of the rotating shaft 10. The second pressure sleeve 9 is inserted into the mounting hole 13 and fixed to the mounting base 3 by bolts. The outer end of the second pressure sleeve 9 is provided with a mounting groove 16. The mounting groove 16 is provided with a screw hole. The fastening nut 11 fastens the rotating shaft 10 and is fixed to the second pressure sleeve 9 by bolts. The second pressure sleeve 9 is also provided with an external hexagonal nut for easy tightening. The left and right rotating devices 7 on the mounting base 3 are installed in opposite directions.

[0043] Furthermore, the scissor seat 5 is provided with a through hole 17 for mounting the rotating shaft 10. A spacer 18 is provided inside the through hole 17, and wear-resistant pads 19 are also provided at both ends of the through hole 17. The spacer 18 and wear-resistant pads 19 are wear-resistant parts to prevent wear of the through hole 17 and improve the service life of the scissor seat 5.

[0044] Furthermore, a hydraulic rotary joint 20 is provided between the connector 1 and the mounting base 3. The hydraulic rotary joint 20 is connected to the external excavator oil circuit. An acceleration valve 21 is provided in the mounting base 3 below the hydraulic rotary joint 20. The oil inlet pipe 22 and oil return pipe 23 of the hydraulic rotary joint 20 are connected to the pipeline of the acceleration valve 21. The acceleration valve 21 is provided with two oil pipes connected to the left and right oil cylinders 4.

[0045] Furthermore, an oil injection hole 24 is provided in the middle of the rotating shaft 10, the oil injection hole 24 extends to the outer circle of the rotating shaft 10, and an oil injection nozzle 25 is installed on the oil injection hole 24.

[0046] Furthermore, the stop groove 14 provided at the outer end of the pressure sleeve 8 is a square groove, and the stop plate 15 provided at the head of the rotating shaft 10 is a square plate.

[0047] Furthermore, the rotary drive device 2 includes a hydraulic motor 26 and a gear mounted on the mounting base 3. The hydraulic motor 26 can drive the mounting base 3 to rotate 360 ​​degrees.

[0048] Furthermore, the mounting base has an installation window 27.

[0049] An assembly method for an adjustable-tension hydraulic shear, comprising the following steps:

[0050] Step 1: Design and fabrication of connector 1;

[0051] Step 2: Design and fabrication of the rotary drive unit 2;

[0052] Step 3: Design and fabrication of mounting base 3;

[0053] Step 4: Design and fabrication of scissor seat 5;

[0054] Step 5: Fix the rotary drive device 2 to the mounting base 3 with bolts; fix the hydraulic rotary joint 20 to the connector 1, and fix the connector 1 to the rotary drive device 2 with bolts;

[0055] Step 6: Hinge the scissor seat 5 onto the mounting base 3 via the rotating device 7; To install the rotating device 7, first fix the pressure sleeve 8 and adjusting shim 12 onto the mounting base 3, then fix the pressure sleeve 9 and adjusting shim 12 onto the mounting base 3, and then pass the rotating shaft 10 through the pressure sleeve 8, scissor seat 5 and pressure sleeve 9.

[0056] Step 7: Adjust the tightness of scissors 6 and check if the fit clearance of scissor seat 5 is appropriate. If not, adjust by adding or removing shims 12.

[0057] Step 8: Fix the rotating shaft 10. Tighten the rotating shaft 10 with the fastening nut 11, and then fix it to the pressure sleeve 9 with bolts.

[0058] Step 9: Install hydraulic cylinder 4. Hinge one end of hydraulic cylinder 4 to the upper end of mounting base 3, and hinge the other end of hydraulic cylinder 4 to scissor seat 5.

[0059] Step 10: Oil circuit installation. The oil inlet pipe 22 and oil return pipe 23 of the hydraulic rotary joint 20 are connected to the pipeline of the accelerator valve 21. The accelerator valve 21 is equipped with two oil pipes connected to the oil cylinder 4.

[0060] In the description of the invention, it should be understood that the terms "inner", "middle", "outer", "upper", "lower", "inside", "both sides", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0061] In this invention, unless otherwise expressly specified and limited, the terms "installation," "setting," "connection," "fixing," "hinging," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise expressly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A hydraulic shear with adjustable tension, comprising a connector (1), characterized in that, The connector (1) is connected to the mounting base (3) via a rotary drive device (2). The upper end of the mounting base (3) is hinged with oil cylinders (4) on both sides. The other end of the oil cylinders (4) is hinged with a scissor seat (5). Scissors (6) are installed on the scissor seat (5). The scissor seat (5) is hinged to the lower end of the mounting base (3) via a rotating device (7). The rotating device (7) includes a pressure sleeve one (8) and a pressure sleeve two (9) fixed at the front and rear ends of the mounting base (3) to limit the axial movement of the scissor seat (5). A rotating shaft (10) passes through the pressure sleeve one (8), the scissor seat (5) and the pressure sleeve two (9) for rotating the scissor seat (5). The other end of the rotating shaft (10) is provided with a fastening thread. A fastening nut (11) is installed on the fastening thread. Adjusting shims (12) are provided on the connecting surfaces of the pressure sleeve one (8) and the pressure sleeve two (9) and the mounting base (3).

2. The hydraulic shears with adjustable tension as described in claim 1, characterized in that: The mounting base (3) has a mounting hole (13) at its lower end. The first pressure sleeve (8) is inserted into the mounting hole (13) and the first pressure sleeve (8) and the adjusting shim (12) are fixed on the mounting base (3) by bolts. The outer end of the first pressure sleeve (8) is provided with a stop groove (14). The head of the rotating shaft (10) is provided with a stop plate (15). The stop plate (15) of the rotating shaft (10) is installed in the stop groove (14) to limit the rotation of the rotating shaft (10). The second pressure sleeve (9) is inserted into the mounting hole (13) and the second pressure sleeve (9) and the adjusting shim (12) are fixed on the mounting base (3) by bolts. The outer end of the second pressure sleeve (9) is provided with a mounting groove (16). The mounting groove (16) is provided with a screw hole. The fastening nut (11) fastens the rotating shaft (10) and then fixes it on the second pressure sleeve (9) by bolts.

3. The hydraulic shears with adjustable tension as described in claim 1, characterized in that: The scissor seat (5) is provided with a through hole (17) for installing the rotating shaft (10), a spacer (18) is provided in the through hole (17), and wear-resistant gaskets (19) are provided at both ends of the through hole (17).

4. The hydraulic shears with adjustable tension as described in claim 1, characterized in that: A hydraulic rotary joint (20) is provided between the connector (1) and the mounting base (3). An acceleration valve (21) is provided in the mounting base (3) below the hydraulic rotary joint (20). The oil inlet pipe (22) and the oil return pipe (23) of the hydraulic rotary joint (20) are connected to the acceleration valve (21). The acceleration valve (21) is provided with two oil pipes connected to the oil cylinder (4).

5. A hydraulic shear with adjustable tension as described in claim 1, characterized in that: The rotating shaft (10) is provided with an oil injection hole (24) in the middle, the oil injection hole (24) extends to the outer circle of the rotating shaft (10), and an oil injection nozzle (25) is installed on the oil injection hole (24).

6. A hydraulic shear with adjustable tension as described in claim 2, characterized in that: The stop groove (14) provided at the outer end of the pressure sleeve (8) is a square groove, and the stop plate (15) provided at the head of the rotating shaft (10) is a square plate.

7. A hydraulic shear with adjustable tension as described in claim 1, characterized in that: The rotary drive device (2) includes a hydraulic motor (26) and a gear mounted on the mounting base (3). The hydraulic motor (26) can drive the mounting base (3) to rotate 360 ​​degrees.

8. A hydraulic shear with adjustable tension as described in claim 1, characterized in that: The mounting base (3) has an installation window (27).

9. A method for assembling an adjustable hydraulic shear with adjustable shear tension, used for assembling the adjustable hydraulic shear with adjustable shear tension as described in any one of claims 1-8, characterized in that: Includes the following steps: Step 1: Design and fabrication of connector (1); Step 2: Design and fabrication of the rotary drive device (2); Step 3: Design and fabrication of the mounting base (3); Step 4: Design and fabrication of the scissor seat (5); Step 5: Fix the rotary drive device (2) to the mounting base (3) with bolts; fix the hydraulic rotary joint (20) to the connector (1), and fix the connector (1) to the rotary drive device (2) with bolts; Step 6: Hinge the scissor seat (5) onto the mounting base (3) via the rotating device (7); To install the rotating device (7), first fix the pressure sleeve one (8) and the adjusting shim (12) onto the mounting base (3), then fix the pressure sleeve two (9) and the adjusting shim (12) onto the mounting base (3), and then pass the rotating shaft (10) through the pressure sleeve one (8), the scissor seat (5) and the pressure sleeve two (9); Step 7: Adjust the tightness of the scissors (6) and check whether the fit clearance of the scissor seat (5) is appropriate. If it is not appropriate, adjust it by adding or removing shims (12). Step 8: Fix the rotating shaft (10). Tighten the rotating shaft (10) with the fastening nut (11), and then fix it to the pressure sleeve (9) with bolts. Step 9: Install the hydraulic cylinder (4). Hinge one end of the hydraulic cylinder (4) to the upper end of the mounting base (3), and hinge the other end of the hydraulic cylinder (4) to the scissor seat (5). Step 10: Oil circuit installation. The oil inlet pipe (22) and return pipe (23) of the hydraulic rotary joint (20) are connected to the pipeline of the acceleration valve (21). The acceleration valve (21) is equipped with two oil pipes connected to the oil cylinder (4).

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