A grabbing and shearing tool for rescue

Abstract

The present invention relates to a grabbing and shearing attachment for rescue, which is special in that it comprises a control part and a working part connected to the control part through a slewing support; the control part comprises a box body, a slewing support is installed on the outer side of the box body, a hydraulic motor is installed in the box body, an output shaft of the hydraulic motor passes through the box body and an engaging pinion is installed on the output shaft, the engaging pinion cooperates with the gear ring of the slewing support, and the hydraulic motor can drive the slewing support to drive the grabbing and shearing attachment to realize 360° unlimited free rotation; the oil inlet end of the oil separator is installed in the box body, and the oil separation end of the oil separator is located outside the box body; a control valve block group connects the hydraulic motor and the oil separator through a pipeline; a herringbone main body connecting end is installed on the slewing support, and a hydraulic claw and a hydraulic shear are respectively installed on two extending arms; the main body adopts a box-type structure; the oil separation end of the oil separator is arranged in the main body, and the hydraulic claw and the hydraulic shear are respectively connected to the oil separation end of the oil separator through pipelines.

Description

Technical Field

[0001] The invention relates to a grabbing and shearing attachment for rescue, belonging to the technical field of rescue equipment. Background Art

[0002] In the rescue process of natural disasters, the existing rescue means are still mainly based on manual rescue and small manual rescue equipment. This rescue method has great limitations, such as low rescue efficiency, which usually takes dozens of hours to complete, limited rescue capacity, and can only remove some small and light objects. At this time, engineering machinery rescue equipment has great advantages, such as good operating performance, flexible and changeable rescue functions, fast and efficient rescue efficiency, greatly reducing the rescue time, protecting people's lives and reducing people's property losses to the greatest extent. However, many engineering machinery rescue equipment currently have many problems, such as single function, low efficiency, insufficient safety performance, etc. When rescuing trapped people, there are major threats to the life safety of both trapped people and rescuers. When there are long and heavy steel bars, steel pipes and other objects at the disaster relief site, there are victims under one end, and there are heavy objects piled up at the other end. At this time, it is difficult to lift the steel bars and other objects to rescue the trapped people. Therefore, a special tooling is needed to cope with the complex situation at the disaster relief site to rescue the trapped people as soon as possible. Summary of the invention

[0003] Aiming at the problem that fragments containing steel bars and steel pipes need to be cut and transported at disaster sites, the present invention provides a grabbing and shearing attachment for rescue.

[0004] The purpose of the present invention is to solve the problems of single function, low efficiency, insufficient safety performance and the like of existing accessories in disaster relief.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a rescue grabbing and shearing attachment, which is special in that it includes a control part and a working part connected to the control part through a slewing support; the control part includes a box body, a slewing support is installed on the outer side of the box body, and an internal gear ring slewing support can be used, a hydraulic motor is installed in the box body, an output shaft of the hydraulic motor passes through the box body and an engaging pinion is installed on the output shaft, the engaging pinion cooperates with the gear ring of the slewing support, the outer ring of the slewing support is fixed on the box body, a control valve block group is installed on the box body, and the hydraulic motor adopts imported The high-quality hydraulic motor can drive the slewing support to drive the grabbing and shearing attachments to achieve 360° unlimited free rotation. The motor drive adopts O-type connection to realize the braking function; the oil inlet end of the oil separator is installed in the box body, and the oil separation end of the oil separator is located outside the box body; the control valve block group connects the hydraulic motor and the oil separator through pipelines; the herringbone main body connection end is installed on the slewing support, and the hydraulic claws and hydraulic shears are installed on the two extended arms respectively; the main body adopts a box-type structure; the oil separation end of the oil separator is set in the main body, and the hydraulic claws and hydraulic shears are connected to the oil separation end of the oil separator through pipelines respectively.

[0006] On the basis of the above technical solution, in order to achieve the convenience of use and the stability of the equipment, the present invention can also make the following improvements to the above technical solution:

[0007] Furthermore, the hydraulic claws and hydraulic shears both adopt jaw structures.

[0008] Furthermore, a hydraulic motor control valve is installed on the hydraulic motor, and the control valve assembly is connected to the hydraulic motor control valve through a pipeline and then communicated with the hydraulic motor.

[0009] Furthermore, the control valve assembly includes a valve body, an O-type center position three-position four-way reversing valve A, an O-type center position three-position four-way reversing valve B and a Y-type center position three-position four-way reversing valve installed on the valve body. The valve body divides the two oil circuits into six circuits, and a pressure reducing valve is provided. Two of the six oil circuits divided by the valve body are connected to the hydraulic gripper after passing through the O-type center position three-position four-way reversing valve A and the oil distributor, which are used to control the on-off and reversing of the gripping part of the oil circuit. When the reversing valve returns to the center position, the oil circuit will be immediately interrupted and the gripper stops. action, which improves the safety of operation; two routes are connected to the hydraulic shear after passing through the O-type mid-position three-position four-way reversing valve B and the oil distributor, which is used to control the on-off and reversing of the shearing part of the oil circuit. The last two routes are connected to the hydraulic motor after passing through the Y-type mid-position three-position four-way reversing valve and the hydraulic motor control valve, which is used to control the on-off and reversing of the rotary part of the oil circuit. When the Y-type mid-position reversing valve returns to the mid-position, the oil inlet is interrupted, the oil return chamber remains unobstructed, and the rotary motor is in a floating state and does not bear the braking load, which is beneficial to protect the motor from damage.

[0010] Furthermore, the control valve is installed on the box body through a reversing valve mounting frame, and the reversing valve mounting frame is C-shaped.

[0011] Furthermore, a connection seat is installed on the box body, and the connection seat includes a connection seat bottom plate and two connection seat side plates, the housing pin is installed between the connection seat side plates, and the oil circuit quick-change connection plate is installed on the connection seat bottom plate, and the oil circuit quick-change connection plate is connected to the valve body of the control valve block group through the oil circuit. The oil circuit quick-change connection plate is a device that fixes the quick connector and connects with the oil circuit of the oil circuit conversion platform, which can realize the rapid connection of the machine, electricity and hydraulic, and greatly reduce the installation time of the accessories;

[0012] The advantages of the present invention are: when there are long and heavy steel bars, steel pipes and other objects at the disaster relief site, with disaster victims at one end and heavy objects piled up at the other end, it is difficult to lift the steel bars and other objects to rescue the trapped people. By using the grabbing part of the attachment to grab the heavy object pressing on one end, and then using hawkbill shears to cut the heavy object, and finally using the grabbing part to remove the cut heavy object, the trapped person can be successfully rescued. This attachment can provide effective protection for the trapped people and rescuers when rescuing the trapped people, so that the rescue work is more effectively guaranteed than manual rescue, and can also greatly improve the rescue efficiency, which is of great significance to improving my country's emergency rescue capabilities and developing rescue equipment.

[0013] In the present application, the hydraulic oil is connected to the oil circuit quick-change connecting plate on the grabbing and shearing attachment through the oil circuit quick-change, so as to realize the quick connection between the excavator and the attachment mechanical and oil circuit. One group of oil circuits is connected to the hydraulic motor, so that the motor rotates to drive the grabbing and shearing attachment to rotate. The other group of oil circuits is divided into two groups of oil circuits through the valve body and two two-position four-way solenoid valves. The two groups of oil circuits are then respectively acted on the grabbing cylinder and the shearing cylinder through the oil separator to realize the opening and closing of the grabbing movable claw and the shearing jaw. The control system of the present invention realizes the division of one group of oil circuits into two groups of oil circuits through the coordinated use of the valve body and the solenoid valve, realizes the multi-function of the attachment without increasing the oil circuit of the excavator, increases the versatility of the attachment, and can be quickly adapted to the excavator at the disaster relief site, thereby increasing the rescue time and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the grabbing and shearing attachment for rescue in this application;

[0015] Figure 2 This is a schematic diagram of the installation position of the hydraulic motor and oil distributor;

[0016] Figure 3 It is a schematic diagram of the hydraulic gripping structure;

[0017] Figure 4 It is a schematic diagram of the hydraulic shear structure;

[0018] Figure 5 It is a schematic diagram of the structure of the control valve assembly;

[0019] Figure 6 It is a schematic diagram of the three-dimensional structure of the mounting bracket of the reversing valve;

[0020] Figure 7 Schematic diagram of the three-dimensional structure of the postal route conversion platform used for docking with the oil route quick-change connection plate;

[0021] Figure 8 Schematic diagram of the connection relationship between the control valve, oil distributor and hydraulic motor;

[0022] Fig. 9This is a schematic diagram of the control oil circuit connection of the grabbing and shearing attachment for rescue in this application;

[0023] Fig.10 This is a schematic diagram of hydraulic gripping and opening oil circuit control;

[0024] Fig.11 This is a schematic diagram of hydraulic grip closing oil circuit control;

[0025] Fig.12 This is a schematic diagram of hydraulic shear opening oil circuit control;

[0026] Fig.13 This is a schematic diagram of the hydraulic shear closed oil circuit control;

[0027] Fig.14 This is a schematic diagram of the forward oil circuit control of the slewing bearing;

[0028] Fig.15 This is a schematic diagram of the slewing bearing reverse oil circuit control.

[0029] The accompanying drawings are marked as follows: 1-housing pin, 2-connecting seat, 3-oil circuit quick-change connecting plate, 4-hydraulic motor, 5-box, 6-oil distributor, 7-slewing bearing, 8-main body, 9-hydraulic grab, 10-hydraulic shear, 11-hydraulic claw closing cylinder, 12-hydraulic claw main pin, 13-hydraulic claw movable gripper, 14-wear-resistant tooth, 15-grabbing limit pin, 16-hydraulic shear closing cylinder, 17-hydraulic shear jaw, 18-hydraulic shear jaw blade, 19-jaw lubrication support rod, 20-control valve block group, 20.1-valve body, 20.2-O-type center position three-position four-way reversing valve A, 20.3-O-type center position three-position four-way reversing valve B, 20.4-Y-type center position three-position four-way reversing valve, 20.5-pressure reducing valve. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0031] A rescue grabbing and shearing attachment (see Figure 1-8), including a control unit, and a working unit connected to the control unit through a slewing support 7; the control unit includes a box body 5, a slewing support 7 is installed on the outer side of the box body 5, a hydraulic motor 4 is installed in the box body 5, an output shaft of the hydraulic motor 4 passes through the box body 5 and a meshing pinion is installed on the output shaft, the meshing pinion cooperates with the gear ring of the slewing support 7, and a control valve block group 20 is installed on the box body 5; the oil inlet end of the oil distributor 6 is installed in the box body 5, and the oil distribution end of the oil distributor 6 is located outside the box body 5; the control valve block group 20 connects the hydraulic motor 4 and the oil distributor 6 through a pipeline; the connecting end of the herringbone main body 8 is installed on the slewing support 7, and a hydraulic claw 9 and a hydraulic shear 10 are respectively installed on the two extending arms; the main body 8 adopts a box-type structure; the oil distribution end of the oil distributor 6 is arranged in the main body 8, and the hydraulic claw 9 and the hydraulic shear 10 are respectively connected to the oil distribution end of the oil distributor 6 through a pipeline; the hydraulic claw 9 and the hydraulic shear 10 both adopt a jaw structure;

[0032] A hydraulic motor control valve is installed on the hydraulic motor 4, and the control valve assembly 20 is connected to the hydraulic motor control valve through a pipeline and then communicated with the hydraulic motor 4;

[0033] The control valve assembly 20 includes a valve body 20.1, an O-type center position three-position four-way reversing valve A20.2, an O-type center position three-position four-way reversing valve B20.3 and a Y-type center position three-position four-way reversing valve 20.4 installed on the valve body 20.1. The valve body 20.1 divides the two oil circuits into six circuits, and a pressure reducing valve 20.5 is provided. Two of the six oil circuits divided by the valve body 20.1 are connected to the hydraulic gripper 7 after passing through the O-type center position three-position four-way reversing valve A20.2 and the oil distributor 6, which are used to control the on-off and reversing of the gripping part of the oil circuit. When the reversing valve returns to the center position, the oil circuit will be immediately interrupted and the gripper stops moving, thereby improving the safety of the operation; the two circuits pass through the O-type center position three-position four-way reversing valve B20. 20.3, the oil distributor 6 is connected to the hydraulic shear 10 to control the on-off and reversing of the shearing part of the oil circuit. The last two circuits pass through the Y-type mid-position three-position four-way reversing valve 20.4, the hydraulic motor control valve and are connected to the hydraulic motor to control the on-off and reversing of the rotary part of the oil circuit. When the Y-type mid-position reversing valve returns to the mid-position, the oil inlet is interrupted, the oil return chamber remains unobstructed, and the rotary motor is in a floating state without bearing the braking load, which is conducive to protecting the motor from damage;

[0034] The control valve 20 is mounted on the box body 5 through a reversing valve mounting frame, and the reversing valve mounting frame is C-shaped;

[0035] A connecting seat 2 is installed on the box body 5, and the connecting seat 2 includes a connecting seat bottom plate and two connecting seat side plates. The shell pin shaft 1 is installed between the connecting seat side plates. The oil circuit quick-change connecting plate 3 is installed on the connecting seat bottom plate. The oil circuit quick-change connecting plate 3 is connected to the valve body 20.1 of the control valve block group 20 through the oil circuit.

[0036] In the above-mentioned embodiment:

[0037] The box body 5 adopts a box structure design, connecting the slewing support 7 with the connecting seat 2, and the internal cavity can place the hydraulic motor 4 and the oil distributor 6; the oil distributor 6 connects the excavator oil circuit with the shear cylinder and the grab cylinder oil circuit; the slewing support 7 adopts a four-point contact ball bearing structure, which can withstand radial loads and bidirectional axial loads, has a small axial clearance, a high limit speed, and a smoother operation; the main body 8 adopts a box structure to enhance the connection strength and reduce the overall product weight; the hydraulic claw 9 adopts claw teeth made of special materials to make the grabbing more firm and not easy to slide, and the single cylinder single claw motion design The design can ensure that the object is concentric during grabbing and shearing, and will not generate torsional force on the grab and shear jaws, while ensuring that the grab is more secure. The single cylinder design can reduce the working flow, shorten the grab time and increase efficiency; the hydraulic shear 10 has a blade made of special materials and a large cylinder diameter to provide a large shear force; the hydraulic claw closing cylinder 11 provides power for grabbing and is equipped with a hydraulic valve block to realize the hydraulic lock function to ensure continuous and stable grabbing force; the hydraulic claw main pin 12 connects the movable grab; the hydraulic claw movable grab 13 adopts a box structure to ensure strength and grab width, making the grab more secure; the wear-resistant teeth 14 The use of special materials and toothed structures can increase wear resistance and gripping effectiveness; the gripping limit pin 15 is connected to the side plate of the box to enhance strength, while limiting the opening and closing positions of the gripper to protect the cylinder; the hydraulic shear closing cylinder 16 uses a large cylinder diameter to increase the cylinder thrust and ensure sufficient shear force; wear-resistant steel plates are welded on both sides of the hydraulic shear jaw 17 to increase service life; the hydraulic shear jaw blade 18 is made of alloy material, the upper and lower jaw blades are consistent in shape, and the six sides maintain sharp angles. The installation direction can be changed for alternating use, reducing the number of blade replacements and increasing service life; the jaw lubrication support rod 19 adopts a split adjustable support gap to ensure the meshing gap of the upper and lower blades of the jaw during shearing; the control system 20 said control system part includes a valve body, an O-type center position three-position four-way reversing valve A, an O-type center position three-position four-way reversing valve B, a Y-type center position three-position four-way reversing valve, a pressure reducing valve and a pressure measuring joint. The valve body designed in the present invention divides 2 oil circuits into 6 circuits, which greatly saves the use of pipelines, and a pressure reducing valve is provided to effectively control the oil pressure of the oil circuit to avoid system overload and damage to the motor. In addition, a pressure measuring interface is provided to facilitate monitoring of the pipeline oil pressure at any time to ensure the stability of the oil circuit system. The valve body divides 6 oil circuits, 2 of which pass through the O-type mid-position three-position four-way reversing valve A, which is used to control the on-off and reversing of the grabbing part of the oil circuit. When the reversing valve returns to the mid-position, the oil circuit will be immediately interrupted and the gripper will stop moving, which improves the safety of the operation; the other 2 pass through the O-type mid-position three-position four-way reversing valve B, which is used to control the on-off and reversing of the shearing part of the oil circuit. The last 2 pass through the Y-type mid-position three-position four-way reversing valve, which is used to control the on-off and reversing of the rotary part of the oil circuit. When the Y-type mid-position reversing valve returns to the mid-position, the oil inlet is interrupted, the oil return chamber remains unobstructed, and the rotary motor is in a floating state without bearing the braking load, which is conducive to protecting the motor from damage. The three-position four-way reversing valve of the control system is installed on the valve body, and the valve body is fixed to the box body through a bracket.The high-pressure oil is controlled by a weak-current solenoid valve, which is easy to install, safe and reliable to operate. The valve block is equipped with an overload protection valve core to effectively protect the hydraulic motor and cylinder.

[0038] like Figure 9-15 As shown, the hydraulic oil circuit control of the present application is to combine the valve body with three three-position four-way solenoid reversing valves to form a control valve assembly to achieve oil circuit switching, which greatly simplifies the use of the oil circuit system and pipelines. When the excavator is working, the oil circuit quick change and the oil circuit quick change connecting plate quickly complete the oil circuit connection and mechanical connection. At the same time, the excavator circuit and the solenoid valve circuit are connected, and the excavator and the attachment are successfully connected. The valve body is combined with the three three-position four-way solenoid reversing valves. The hydraulic oil supplied by the main pump is divided into six paths after passing through the control system. Among them, four paths of hydraulic oil are used to drive hydraulic shears and hydraulic grabber hydraulic cylinders respectively through oil separators to achieve grabbing and shearing actions. The reversing valve that controls the grabbing and shearing actions adopts O-type neutral control. When the inlet and return oil circuits are cut off, the brake can be quickly applied. This control method improves safety while ensuring the stability of grabbing and shearing actions. The other two oil lines are used to drive the hydraulic cycloid motor to achieve 360° unlimited free rotation of the hydraulic gripper. The Y-type neutral position control is used for the rotating part to avoid excessive braking under load and the inertia force to produce a large hydraulic shock. This control method can make the hydraulic motor float when the reversing valve returns to the neutral position, and then use the braking function of the brake to stop it smoothly. This control system realizes the versatility of rescue accessories without increasing the main engine oil circuit, greatly simplifies the pipeline, and is more convenient and quick to operate. It can be quickly connected with various excavators to win more time for rescue. The specific working status is as follows:

[0039] Grab and open process: The high-pressure oil supplied by the main pump enters the oil distributor through the three-position four-way electromagnetic reversing valve A controlled by the O-type center position. After passing through the oil distributor, part of it passes through the oil circuit K1 to open the pressure guide, and part of it passes through the oil circuit P1 to enter the rod chamber of the oil cylinder, pushing the piston from the high-pressure chamber to the low-pressure chamber. The hydraulic oil in the low-pressure chamber returns to the oil tank through the pilot balance valve, completing the cylinder contraction action and the gripper opens. If the high-pressure oil supplied by the main pump is suddenly interrupted during this process, the pressure guide is not opened, so the hydraulic oil in the rodless chamber cannot return to the oil tank through the balance valve, the oil pressure at both ends of the cylinder piston is balanced, and the gripper remains in place, avoiding the occurrence of the gripper falling phenomenon.

[0040] Grabbing and closing process: The high-pressure oil supplied by the main pump enters the rodless chamber of the cylinder through the oil separator and the balancing valve (free flow part), pushing the piston from the high-pressure chamber to the low-pressure chamber. The hydraulic oil in the low-pressure chamber returns to the oil tank, completing the cylinder extension action and closing the gripper.

[0041] Shear closing: The high-pressure oil supplied by the main pump enters the oil separator through the O-type center-position three-position four-way reversing valve B. After passing through the oil separator, the hydraulic oil enters the rodless chamber of the cylinder, pushing the piston from the high-pressure chamber to the low-pressure chamber. The hydraulic oil in the low-pressure chamber returns to the oil tank through the pilot balance valve, completing the cylinder extension action and closing the jaw.

[0042] Shear opening: The high-pressure oil supplied by the main pump enters the rod chamber of the cylinder after passing through the oil separator, pushing the piston from the high-pressure chamber to the low-pressure chamber. The hydraulic oil in the low-pressure chamber returns to the oil tank through the pilot balance valve, completing the cylinder contraction action and opening the jaw.

[0043] Forward rotation process: the high-pressure oil supplied by the main pump enters the control valve block through the Y-type center-position three-position four-way reversing valve. If the oil pressure supplied by the main pump is greater than the opening set pressure of the relief valve at this time, the relief valve is opened to remove the overload so that the system oil pressure does not exceed the maximum set pressure. A part of the hydraulic oil that meets the pressure requirement opens the pilot through the oil circuit M1, and the other part enters the motor through the balance valve (free flow part) to drive the motor to rotate. The low-pressure oil inside the motor returns to the oil tank through the circuit balance valve to complete the forward rotation action. If during this process, the high-pressure oil supplied by the main pump is suddenly interrupted, the pressure guide is not opened, the circuit is interrupted, the hydraulic motor will slowly stop rotating, and the gripper will maintain its original angle unchanged.

[0044] Reversal process: the high-pressure oil supplied by the main pump enters the control valve block through the Y-type mid-position three-position four-way reversing valve. If the oil pressure supplied by the main pump is greater than the opening set pressure of the relief valve at this time, the relief valve is opened to remove the overload so that the system oil pressure does not exceed the maximum set pressure. A part of the hydraulic oil that meets the pressure requirement opens the pilot through the oil circuit M2, and the other part enters the motor through the balancing valve (free flow part) to drive the motor to rotate. The low-pressure oil inside the motor returns to the oil tank through the circuit balancing valve to complete the reversal action. If during this process, the high-pressure oil supplied by the main pump is suddenly interrupted, the pressure guide is not opened, the circuit is interrupted, the hydraulic motor will slowly stop rotating, and the gripper will maintain its original angle unchanged.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rescue grabbing and shearing tool, characterized in that: It includes a control part and a working part connected to the control part via a slewing support (7); The control unit comprises a housing (5), a slewing support (7) is installed on the outer side of the housing (5), a hydraulic motor (4) is installed in the housing (5), an output shaft of the hydraulic motor (4) passes through the housing (5) and a meshing pinion is installed on the output shaft, the meshing pinion cooperates with the gear ring of the slewing support (7), and a control valve assembly (20) is installed on the housing (5); an oil inlet end of an oil separator (6) is installed in the housing (5), and an oil separation end of the oil separator (6) is located outside the housing (5); the control valve assembly (20) is connected to the hydraulic motor (4) and the oil separator (6) through a pipeline; The connecting end of the herringbone-shaped main body (8) is mounted on the slewing support (7), and the two extended arms are respectively mounted with a hydraulic claw (9) and a hydraulic shear (10); the main body (8) adopts a box-type structure; the oil separation end of the oil separator (6) is arranged in the main body (8), and the hydraulic claw (9) and the hydraulic shear (10) are respectively connected to the oil separation end of the oil separator (6) through pipelines; The control valve assembly (20) comprises a valve body (20.1), an O-type center position three-position four-way reversing valve A (20.2), an O-type center position three-position four-way reversing valve B (20.3) and a Y-type center position three-position four-way reversing valve (20.4) installed on the valve body (20.1); The valve body branches out 6 oil circuits, 2 of which pass through the O-type mid-position three-position four-way reversing valve A to control the on-off and reversing of the grabbing part oil circuit. When the reversing valve returns to the mid-position, the oil circuit will be immediately interrupted and the gripper will stop moving, thereby improving the safety of the operation. The other 2 pass through the O-type mid-position three-position four-way reversing valve B to control the on-off and reversing of the shearing part oil circuit. The last 2 pass through the Y-type mid-position three-position four-way reversing valve to control the on-off and reversing of the rotary part oil circuit. When the Y-type mid-position reversing valve returns to the mid-position, the oil inlet is interrupted, the oil return chamber remains unobstructed, the rotary motor is in a floating state and does not bear the braking load, thereby protecting the motor from damage.

2. The rescue grabbing and shearing attachment according to claim 1, characterized in that: The hydraulic claw (9) and the hydraulic shear (10) both adopt a jaw structure.

3. The rescue grabbing and shearing attachment according to claim 1, characterized in that: A hydraulic motor control valve is installed on the hydraulic motor (4), and the control valve assembly (20) is connected to the hydraulic motor control valve through a pipeline and then communicated with the hydraulic motor (4).

4. The rescue grabbing and shearing attachment according to claim 1, characterized in that: The control valve assembly (20) is mounted on the box body (5) via a reversing valve mounting frame, and the reversing valve mounting frame is in a C shape.

5. The rescue grabbing and shearing attachment according to claim 1, characterized in that: A connecting seat (2) is installed on the box body (5), and the connecting seat (2) includes a connecting seat bottom plate and two connecting seat side plates. The housing pin shaft (1) is installed between the connecting seat side plates. The oil circuit quick-change connecting plate (3) is installed on the connecting seat bottom plate. The oil circuit quick-change connecting plate (3) is connected to the valve body (20.1) of the control valve assembly (20) through the oil circuit.

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