Multi-petal broken steel gripping apparatus for lorry-mounted crane

Abstract

The utility model discloses a multi-petal broken steel gripping apparatus for a lorry-mounted crane, and relates to the technical field of crane gripping assistive devices. Comprising a rotary motor, a hydraulic flow dividing system, a mounting base, a hydraulic oil cylinder and a grabbing arm, wherein the rotary motor is provided with an opening / closing oil port; the mounting base comprises a barrel and a mounting vertical plate, a process hole for mounting an oil pipe is formed in the barrel, and the mounting vertical plate and the barrel form a square box cavity structure through welding; the rotary motor is mounted on the barrel; the grabbing arm is hinged to the mounting vertical plate, the hydraulic oil cylinder is mounted in a square box cavity structure formed by the mounting vertical plate and the barrel, and the hydraulic oil cylinder is hinged to the mounting vertical plate and the grabbing arm; the hydraulic flow dividing system comprises a hydraulic oil pipe and a flow dividing device, the flow dividing device is installed in the cylinder, and the hydraulic oil pipe penetrates through a process hole of the cylinder of the installation base to connect the flow dividing device with a corresponding structure outside the cylinder. The shunting device is connected with the rotating motor and the hydraulic oil cylinder through hydraulic oil pipes. A small-size gripper oil pipe is arranged, and the situation that the reliability and the service life are affected due to the fact that the structure is limited and the hydraulic oil pipe is twisted is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of crane grabbing accessories, in particular to a multi-petal scrap steel grab for a truck-mounted crane. Background Art

[0002] As an extended application of a crane, a crane grabbing accessory is particularly suitable for the loading, unloading, stacking and transfer of some special or special materials. A scrap steel grab, also known as a plum blossom bucket grab, is a grab for grabbing special materials such as scrap steel, slag, iron filings, etc. It controls the simultaneous opening and closing of multiple grab arms through an oil cylinder to clamp the scrap steel to be grabbed, so as to realize the grabbing of goods.

[0003] Some of the grabs disclosed in the prior art are large in volume and self-weight, and are generally assembled on large excavator products for use, which does not conform to the small and light working characteristics of a truck-mounted crane; while the small-volume grabs have limited structures, which easily cause the hydraulic oil pipes to be twisted, seriously affecting the reliability and service life of the grabs. The Chinese utility model patent with the publication number CN201385983Y discloses a scrap steel grab, in which the grab arm is hinged to the bracket and the oil cylinder, and is driven by a rotary motor, but the patent does not propose a specific solution for the layout of the oil pipes. Summary of the Invention

[0004] In order to solve the above technical problems, the utility model provides a multi-petal scrap steel grab for a truck-mounted crane, and arranges the oil pipes of the small-volume grab to avoid the problem that the small-volume grab is easily limited by the structure, resulting in the torsion of the hydraulic oil pipes and affecting the reliability and service life of the grab.

[0005] The technical solution of the utility model is: a multi-petal scrap steel grab for a truck-mounted crane includes a rotary motor, and the rotary motor is provided with an opening / closing oil port;

[0006] An installation base, the installation base includes a cylinder body and an installation vertical plate. The cylinder body is provided with a process hole for installing an oil pipe. The installation vertical plate forms a square box cavity structure with the cylinder body by welding. The installation vertical plate is provided with a grab arm installation hinge point and an oil cylinder installation hinge point; the rotary motor is installed on the cylinder body of the installation base;

[0007] A grab arm, the grab arm is provided with a grab arm hinge point and a grab arm oil cylinder installation hinge point, and the grab arm is hinged to the installation vertical plate through the grab arm hinge point and the grab arm installation hinge point;

[0008] A hydraulic oil cylinder, the hydraulic oil cylinder is installed in the square box cavity structure formed by the installation vertical plate and the cylinder body. The hydraulic oil cylinder is provided with a large cavity hinge point and a small cavity hinge point. The hydraulic oil cylinder is hinged to the oil cylinder installation hinge point on the installation vertical plate through the large cavity hinge point, and the hydraulic oil cylinder is hinged to the grab arm oil cylinder installation hinge point through the small cavity hinge point;

[0009] Hydraulic shunt system, the hydraulic shunt system includes hydraulic oil pipes and a shunt device. The shunt device is installed inside the installation base cylinder body. The hydraulic oil pipes pass through the process holes of the installation base cylinder body 3 and connect the shunt device with the corresponding structures outside the cylinder body; the shunt device and the corresponding structures outside the cylinder body; the shunt device is provided with one inlet / return oil confluence interface and multiple inlet / return oil shunt interfaces; the inlet / return oil confluence interface is connected to the opening / closing oil port of the rotary motor through a hydraulic oil pipe; the inlet / return oil shunt interfaces are connected to the small / large chamber oil ports of the hydraulic cylinder through hydraulic oil pipes.

[0010] Further, the grab arm is formed by welding a right side plate, a left side plate, an upper closing plate and a lower closing plate to form a cavity structure.

[0011] Further, the lower closing plate of the grab arm can be designed as a fully closed type or a semi-closed type according to different goods to be grabbed, and wear-resistant plate materials are selected for the grab bucket tooth tips.

[0012] Further, the installation vertical plate forms 5 square box cavity structures by welding along the circumferential direction of the cylinder body, and a cavity with a centrosymmetric structure is formed when the grab is closed.

[0013] Further, the lengths of the hydraulic oil pipes connecting the shunt device and the hydraulic cylinder are set to be the same.

[0014] Further, the shunt device is set as a cavity type structure. The outer wall of the shunt device is wrapped around the inner wall of the shunt device by welding to form a cylindrical cavity. The inlet / return oil confluence interface is arranged on the end face of the shunt device, and multiple inlet / return oil shunt interfaces are evenly distributed on the circumferential surface of the outer wall of the shunt device.

[0015] Further, the shunt device is set as a valve block type structure. The inlet / return oil confluence interface is arranged on the end face of the shunt device by drilling, and multiple inlet / return oil shunt interfaces are evenly distributed on its upper end face.

[0016] Further, the shunt device is set as a tubing type structure. The inlet / return oil confluence interface and multiple inlet / return oil shunt interfaces are respectively arranged on the annular pipeline by bending and welding.

[0017] The beneficial effects of the present utility model are:

[0018] (1) The hydraulic shunt system of the present utility model is hidden inside the installation base cavity, which not only solves the problem of pipe layout in a small space, makes full use of the space of the grab, but also protects the hydraulic pipes and improves the reliability of the grab;

[0019] (2) The grab arm structure with centrosymmetric distribution and the arrangement of oil pipes with the same length in the present utility model ensure the synchronization of the grabbing actions;

[0020] (3) The grab of the present utility model is driven by a rotary motor, and the position of the crane does not need to be adjusted to meet the grasping work at various angles;

[0021] (4) The grab of the present utility model is small in size and compact in structure, suitable for the working conditions of rapid grasping and flexible transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the present utility model;

[0023] Figure 2 It is a schematic structural diagram of the mounting base and the grab arm of the present utility model;

[0024] Figure 3 It is a schematic structural diagram of the hydraulic flow splitting system of the present utility model;

[0025] Figure 4 It is a schematic structural diagram of the cavity-type flow splitting device of the present utility model;

[0026] Figure 5 It is a schematic structural diagram of the valve block-type flow splitting device of the present utility model;

[0027] Figure 6 It is a schematic structural diagram of the oil pipe-type flow splitting device of the present utility model;

[0028] Wherein: 1. Rotary motor, 1.1 Rotary motor opening / closing oil port, 2. Hydraulic flow splitting system, 2.1 Hydraulic oil pipe, 2.2 Flow splitting device, 2.2.1 Inlet / return oil confluence interface, 2.2.2 Inlet / return oil splitting interface, 2.2.3 Inner wall of the flow splitting device, 2.2.4 Outer wall of the flow splitting device, 3. Mounting base, 3.1 Cylinder body, 3.2 Mounting vertical plate, 3.3 Grab arm mounting hinge point, 3.4 Oil cylinder mounting hinge point, 4. Hydraulic oil cylinder, 5. Grab arm, 5.1 Right side plate, 5.2 Left side plate, 5.3 Upper sealing plate, 5.4 Lower sealing plate, 5.5 Grab arm hinge point, 5.6 Grab arm oil cylinder mounting hinge point. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the following will combine the appended Figures 1 to 6 The technical solutions of the present utility model will be described clearly and completely. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the described embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present utility model.

[0030] This embodiment provides a multi-petal scrap steel grab for a truck-mounted crane, and the structure is as Figure 1As shown, it includes a rotary motor 1, a hydraulic shunt system 2, a mounting base 3, a hydraulic cylinder 4, and a grab arm 5. The rotary motor 1 is provided with an opening / closing oil port 1.1.

[0031] As Figure 1 , Figure 2 shown, the mounting base 3 includes a cylinder body 3.1 and a mounting vertical plate 3.2. The cylinder body 3.1 is provided with a process hole for installing oil pipes. The mounting vertical plate 3.2 and the cylinder body 3.1 form a square box cavity structure by welding. The mounting vertical plate 3.2 is provided with a grab arm mounting hinge point 3.3 and a cylinder mounting hinge point 3.4. The rotary motor 1 is installed on the cylinder body 3.1 of the mounting base by bolts.

[0032] As Figure 2 shown, the grab arm 5 is provided with a grab arm hinge point 5.5 and a grab arm cylinder mounting hinge point 5.6. The grab arm 5 is hinged to the mounting vertical plate 3.2 through the grab arm hinge point 5.5 and the grab arm mounting hinge point 3.3.

[0033] As Figure 1 shown, the hydraulic cylinder 4 is installed in the square box cavity structure formed by the mounting vertical plate 3.2 and the cylinder body (3.1). The hydraulic cylinder 4 is provided with a large chamber hinge point, a small chamber hinge point, a large chamber oil port, and a small chamber oil port. The hydraulic cylinder (4) is hinged to the cylinder mounting hinge point 3.4 on the mounting vertical plate 3.2 through the large chamber hinge point, and the hydraulic cylinder 4 is hinged to the grab arm cylinder mounting hinge point 5.6 through the small chamber hinge point.

[0034] As Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 shown, the hydraulic shunt system 2 includes a hydraulic oil pipe 2.1 and a shunt device 2.2. The shunt device 2.2 is installed in the cylinder body 3.1 of the mounting base. The hydraulic oil pipe 2.1 passes through the process hole of the cylinder body 3.1 of the mounting base and connects the shunt device 2.2 with the corresponding structure outside the cylinder body 3.1. The shunt device 2.2 is provided with an inlet / outlet oil confluence interface 2.2.1 and a plurality of inlet / outlet oil shunt interfaces 2.2.2. The inlet / outlet oil confluence interface 2.2.1 of the shunt device 2.2 is connected to the opening / closing oil port 1.1 of the rotary motor 1 through the hydraulic oil pipe 2.1. The inlet / outlet oil shunt interfaces 2.2.2 are connected to the small / large chamber oil ports of the hydraulic cylinder through the hydraulic oil pipe 2.1.

[0035] As Figure 2 shown, the grab arm 5 is formed by welding a right side plate 5.1, a left side plate 5.2, an upper sealing plate 5.3, and a lower sealing plate 5.4 to form a cavity structure.

[0036] As Figure 2 shown, the lower sealing plate 5.4 of the grab arm 5 can be designed as a fully closed type or a semi-closed type according to different goods to be grabbed, and the grab bucket tooth tips are made of wear-resistant plate materials.

[0037] As shown Figure 1 In the figure, the installation vertical plate 3.2 forms five square box cavity structures along the circumferential direction of the cylinder body 3.1 by welding, and a cavity with a centrosymmetric structure is formed when the gripper is closed.

[0038] As shown Figure 3 In the figure, the lengths of the hydraulic oil pipes 2.1 connecting the flow dividing device 2.2 and the hydraulic cylinder 4 are set to be the same.

[0039] As shown Figure 4 In the figure, the flow dividing device 2.2 is set as a cavity type structure. The outer wall 2.2.4 of the flow dividing device wraps the inner wall 2.2.3 of the flow dividing device by welding to form a cylindrical cavity. The inlet / return oil confluence interface 2.2.1 is arranged on the end face of the flow dividing device 2.2, and multiple inlet / return oil flow dividing interfaces 2.2.2 are evenly distributed on the circumferential surface of the outer wall 2.2.4 of the flow dividing device.

[0040] As shown Figure 5 In the figure, the flow dividing device 2.2 is set as a valve block type structure. The inlet / return oil confluence interface 2.2.1 is arranged on the end face of the flow dividing device 2.2 by drilling, and multiple inlet / return oil flow dividing interfaces 2.2.2 are evenly distributed around the upper end face thereof.

[0041] As shown Figure 6 In the figure, the flow dividing device 2.2 is set as a tubing type structure. The inlet / return oil confluence interface 2.2.1 and multiple inlet / return oil flow dividing interfaces 2.2.2 are respectively arranged on the annular pipeline by bending and welding.

[0042] Working principle of the hydraulic gripper of the truck-mounted crane:

[0043] The hydraulic system of the truck-mounted crane provides power for the gripper. The hydraulic pump extracts hydraulic oil from the fuel tank, pressurizes it and then transports it to the hydraulic valve. When an object needs to be grabbed, the operator makes the hydraulic valve switch to the grabbing working position by controlling the handle or button. The high-pressure hydraulic oil enters the hydraulic cylinder of the gripper, pushing the piston to move. In the gripper, the piston rod of the hydraulic cylinder is usually connected to the linkage mechanism of the gripper arm. When the piston rod extends, through the action of the linkage mechanism, the gripper arm closes inward, thus realizing the action of grabbing the object.

[0044] When the object needs to be put down, the operator operates the control device again, the hydraulic valve switches to the release position, the hydraulic oil flows back to the fuel tank, the piston rod retracts, the gripper arm opens outward under the drive of the linkage mechanism, and the object is put down. The whole process realizes the stable grabbing and releasing operations of the gripper of the truck-mounted crane through the precise control of the hydraulic system.

[0045] Except for the above embodiments, the present utility model may also have other implementation manners; all technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present utility model.

Claims

1. A multi-petal scrap steel grab for a truck-mounted crane, characterized in that, It includes a rotary motor (1) which is provided with an opening / closing oil port (1.1). An installation base (3), the installation base (3) includes a cylinder body (3.1) and an installation vertical plate (3.2). There are process holes for installing oil pipes on the cylinder body (3.1). The installation vertical plate (3.2) and the cylinder body (3.1) form a square box cavity structure. There are gripper arm installation hinge points (3.3) and oil cylinder installation hinge points (3.4) on the installation vertical plate (3.2). The rotary motor (1) is installed on the cylinder body (3.1) of the installation base. A gripper arm (5), the gripper arm (5) is provided with a gripper arm hinge point (5.5) and a gripper arm oil cylinder installation hinge point (5.6). The gripper arm (5) is hinged to the installation vertical plate (3.2) through the gripper arm hinge point (5.5) and the gripper arm installation hinge point (3.3). A hydraulic oil cylinder (4), the hydraulic oil cylinder (4) is installed in the square box cavity structure formed by the installation vertical plate (3.2) and the cylinder body (3.1). The hydraulic oil cylinder (4) is provided with a large cavity hinge point and a small cavity hinge point. The hydraulic oil cylinder (4) is hinged to the oil cylinder installation hinge point (3.4) on the installation vertical plate (3.2) through the large cavity hinge point, and the hydraulic oil cylinder (4) is hinged to the gripper arm oil cylinder installation hinge point (5.6) through the small cavity hinge point. A hydraulic shunt system (2), the hydraulic shunt system (2) includes a hydraulic oil pipe (2.1) and a shunt device (2.2). The shunt device (2.2) is installed in the cylinder body (3.1) of the installation base. The hydraulic oil pipe (2.1) passes through the process hole of the cylinder body (3.1) of the installation base and connects the shunt device (2.2) with the corresponding structure outside the cylinder body (3.1). The shunt device (2.2) is provided with an inlet / return oil confluence interface (2.2.1) and a plurality of inlet / return oil shunt interfaces (2.2.2). The inlet / return oil confluence interface (2.2.1) of the shunt device (2.2) is connected to the opening / closing oil port (1.1) of the rotary motor (1) through a hydraulic oil pipe (2.1). The inlet / return oil shunt interface (2.2.2) is connected to the small / large cavity oil port of the hydraulic oil cylinder through a hydraulic oil pipe.

2. The multi-petal scrap steel grab for a truck-mounted crane according to claim 1, characterized in that, The gripper arm (5) is formed by welding a right side plate (5.1), a left side plate (5.2), an upper sealing plate (5.3) and a lower sealing plate (5.4) to form a cavity structure.

3. The multi-petal steel scrap grab for a truck-mounted crane according to claim 2, characterized in that, The lower sealing plate (5.4) of the gripper arm (5) is designed as a fully closed type or a semi-closed type according to different goods to be grabbed, and wear-resistant plate materials are selected for the gripper teeth tips.

4. The multi-petal scrap steel grab for a truck-mounted crane according to claim 1, characterized in that, The installation vertical plate (3.2) forms 5 square box cavity structures by welding along the circumferential direction of the cylinder body (3.1), and a cavity with a centrosymmetric structure is formed when the gripper is closed.

5. The multi-petal scrap steel grab for a truck-mounted crane according to claim 1, characterized in that, The lengths of the hydraulic oil pipes (2.1) connecting the shunt device (2.2) and the hydraulic oil cylinder (4) are set to be the same.

6. The multi-petal steel scrap grab for a truck-mounted crane according to claim 1, characterized in that, The shunt device (2.2) is set as a cavity type structure. The outer wall (2.2.4) of the shunt device is welded to wrap the inner wall (2.2.3) of the shunt device to form a cylindrical cavity. The inlet / return oil confluence interface (2.2.1) is arranged on the end face of the shunt device (2.2), and a plurality of inlet / return oil shunt interfaces (2.2.2) are evenly distributed on the circumferential surface of the outer wall (2.2.4) of the shunt device.

7. The multi-petal steel scrap grab for a truck-mounted crane according to claim 1, characterized in that , The flow splitting device (2.2) is arranged in a valve block structure, and the inlet / outlet oil confluence interface (2.2.1) is arranged on the end face of the flow splitting device (2.2) by drilling, and a plurality of inlet / outlet oil splitting interfaces (2.2.2) are evenly distributed on its upper end face.

8. The multi-petal scrap steel grab for a truck-mounted crane according to claim 1, characterized in that , The flow splitting device (2.2) is arranged in a tubing structure, and the inlet / outlet oil confluence interface (2.2.1) and a plurality of inlet / outlet oil splitting interfaces (2.2.2) are respectively arranged on the annular pipeline by bending and welding.

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