Pin pulling device

Abstract

The utility model discloses a pin pulling device, and belongs to the field of crane accessories, the pin pulling device comprises a mounting body, a driving body is fixed on one side of the mounting body, one end of a driving rod on the driving body is movably arranged in an operation area of the mounting body, and limiting pieces for limiting the mounting body are arranged on the side walls of the two sides of the operation area; the mounting position of the limiting piece is adjustable; when the pin pulling device is used, when pin pulling operation is carried out on the pin shafts at different positions, the arm support connector is arranged in the operation area of the installation body, the installation limiting piece limits the overall moving position of the installation body, the driving body presses the pin shafts out of the installation holes in the arm support connector, the device can move, the single driving body can be suitable for dismounting and mounting of the multiple pin shafts, and the operation is convenient. And a traditional structure that a pin shaft and an oil cylinder mounting frame are correspondingly arranged does not need to be adopted, so that a special mounting bracket is excessively mounted, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of crawler crane accessories, and in particular to a pin pulling device. Background Art

[0002] Crawler cranes are mechanical equipment that use crawler walking chassis and can lift heavy objects to a certain height. The boom of a crawler crane is usually composed of truss-type boom sections connected by pins. The weight of the boom section is about 10 tons. The pins used to connect the boom sections are usually made of high-strength steel and weigh from tens to hundreds of kilograms. It takes a lot of manpower to install it, and usually uses a cylinder to assist in installation. If the pin needs to be removed, conventional technology uses a cylinder to assist in installation.

[0003] Existing technology as attached Figure 1 In the middle, 7 is the boom joint, 20 is the boom section connecting pin, 30 is the bracket, 40 is the bolt and nut fasteners, 50 is the guide screw, and 60 is the oil cylinder mounting bracket. The oil cylinder is mounted on the bracket to extrude the guide screw to install the boom section connecting pin. There is more than one location for installing the pin on the crane. Such a design structure results in that each pin installation location must be equipped with a dedicated mounting bracket for the oil cylinder. The number of installations is large and the cost required is relatively high. At this time, we need a new pin pulling device. Utility Model Content

[0004] The purpose of the present application is to provide a method to solve the defect that multiple special brackets need to be installed on the equipment in the prior art to realize the pin shaft loading and unloading, which leads to high manufacturing cost.

[0005] In order to solve the above technical problems, the present application is implemented by adopting the following technical solutions: a pin pulling device, comprising a mounting body, a driving body being fixed on one side of the mounting body, one end of a driving rod on the driving body being movably placed in an operating area of ​​the mounting body, and limiting members for limiting the mounting body are provided on the side walls on both sides of the operating area, and the installation position of the limiting members is adjustable.

[0006] According to a further solution of the present application, an open mounting groove is provided on the mounting body, the driving body is fixed on a side wall of the mounting body, and a driving rod of the driving body is movably placed in the mounting groove.

[0007] In a further solution, the driving body is a hydraulic cylinder, and the driving rod is a cylinder push rod.

[0008] A reversing valve is also installed on the hydraulic oil cylinder, and the reversing valve is connected to the oil cylinder push rod pipeline.

[0009] Preferably, a buffer pad is fixed to one end of the cylinder push rod placed in the mounting groove.

[0010] According to a further solution of the present application, a plurality of groups of limiting holes are provided on opposite side walls of the installation slot, and the limiting member is placed in any group of limiting holes.

[0011] According to a further solution of the present application, the central axis of the driving rod and the central axis of the driving body are arranged colinearly, so that the device looks more aesthetically pleasing and at the same time ensures that the device is relatively stable in use.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] When the present application is used, when the pins at different positions of the crane are being pulled out, the boom joint is placed in the working area of ​​the mounting body, and the installation limiter is used to limit the overall movement position of the mounting body, wherein the driving body presses the pin out of the mounting hole on the boom joint. The present device is movable, and a single driving body can be used for the disassembly and assembly of multiple pins. There is no need to adopt a traditional structure in which the pins and the cylinder mounting frame are arranged in correspondence, which results in excessive installation of special mounting brackets and reduces manufacturing costs.

[0014] A plurality of limit holes are provided on the mounting groove of the driving body, so as to ensure the installation position of the limit member can be quickly positioned to control the distance between the limit member and the bottom of the mounting groove, thereby preventing the driving rod from having insufficient stroke, affecting the disassembly and assembly effect of the pin shaft, or even causing disassembly and assembly failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the existing boom connection pin installation device;

[0016] Figure 2 This is a schematic diagram of the structure of an embodiment of the present application;

[0017] Figure 3 It is a left view of the embodiment of the present application;

[0018] Figure 4 It is a front view of an embodiment of the present application;

[0019] Figure 5 A top view of an embodiment of the present application;

[0020] Figure 6 This is a schematic diagram of the working state structure of the embodiment of the present application;

[0021] Figure 7 This is a schematic diagram of the structure after the arm support connecting pin is assembled in the embodiment of the present application;

[0022] Among them, 1 is a reversing valve; 2 is a driving body, 3 is a driving rod, 4 is a mounting body, 5 is a limiting piece; 6 is an arm support connecting pin; 7 is an arm support joint; 8 is a limiting hole; and 9 is a mounting groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use.

[0024] Reference Figure 2-5 In this embodiment, a pin pulling device is disclosed, which includes a mounting body 4, a driving body 2 is fixed to one side of the mounting body 4, one end of a driving rod 3 on the driving body 2 is movably placed in an operating area of ​​the mounting body 4, and limiting members 5 for limiting the mounting body 4 are provided on the side walls on both sides of the operating area, and the installation position of the limiting member 5 is adjustable.

[0025] When using, refer to the attached Figure 6 , move the mounting body 4 to place the arm joint 7 in the working area, adjust the installation position of the limiter 5 so that the driving rod 3 has an effective stroke, place the arm connecting pin 6 between the driving rod 3 and the mounting hole of the arm joint 7, start the driving rod 3 and slowly press the arm connecting pin 6 into the mounting hole. The operation is simple and easy to carry, and the device does not need to set up multiple special mounting frames.

[0026] Reference Figure 3 The working area mentioned in this embodiment is a mounting groove 9 opened on the mounting body 4. This mounting groove 9 has an end wall, and the side walls on both sides are penetrated, so that the appearance of the mounting body 4 is similar to a U-shaped part. The driving body 2 is fixed on the end wall of the mounting body 4, and the driving rod 3 of the driving body 2 is movably placed in the mounting groove 9; the driving body 2 here selects a suitable power device according to needs. In this embodiment, a conventional cylinder body is used as the driving body 2, and the cylinder push rod of the cylinder body is used as the driving rod 3.

[0027] Continue to observe the attached Figure 2 In this embodiment, a reversing valve 1 is also installed on the hydraulic cylinder. The reversing valve 1 is connected to the cylinder push rod pipeline for easy operation. The reversing valve controls the extension and contraction of the cylinder push rod to meet the disassembly and assembly of the arm support connecting pin 6. Figure 3 Considering that the pin shaft of the lifting machinery is a metal part, in order to avoid rigid contact between the cylinder push rod and the connecting pin shaft 6, a buffer pad is fixed on the end surface of one end of the cylinder push rod in the mounting groove 9 to extend the service life of the device.

[0028] Reference Figure 3 and 5 The specific installation method of the position limiting member 5 involved in this embodiment is embodied. Two groups of position limiting holes 8 are opened on the opposite side walls of the installation groove 9. The number of the groups of position limiting holes 8 is set according to the actual situation.

[0029] The limiting member 5 is placed in any group of limiting holes 8. When adjusting the distance, just select a suitable limiting hole to insert. The limiting member 5 of this embodiment uses a limiting pin shaft, and some embodiments use a limiting plate. In this case, the limiting hole 8 is specifically a limiting square hole. At the same time, the limiting slide groove is provided to cooperate with the bolt and nut to move and position, and the adjustment effect can also be achieved.

[0030] In some other embodiments, the arrangement of parts is optimized. For example, the central axis of the driving rod 3 and the central axis of the driving body 2 are arranged to be colinear, so as to make the device more beautiful and ensure that the center of gravity is not offset.

[0031] Specific use;

[0032] When installing the arm connecting pin 6, place the arm joint 7 in the mounting groove 9 of the mounting body 4, select the limiting hole 8 at a suitable position to insert the limiting member 5 to limit the position of the mounting body 4, operate the reversing valve 1, start the driving body 2 to press the arm connecting pin 6 between the driving rod 3 and the arm joint 7 into the mounting hole of the arm joint 7 until it is fully pressed in.

[0033] When disassembling the arm support connecting pin 6, pull out the limit piece 5 and insert it into the limiting hole 8 near the driving body 2. At this time, operate the reversing valve 1, push the push rod 3 outward, so that the arm support connecting pin 6 moves to the right. Continue to push, and the pin will be pushed out of the arm support joint 7. When the arm support joint 7 is completely pushed out, operate the reversing valve 1, stop the action, and complete the pin pulling action. For the use status of the device, refer to the attached Figure 7 .

[0034] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A pin pulling device, characterized in that: The invention comprises a mounting body (4), a driving body (2) being fixed to one side of the mounting body (4), one end of a driving rod (3) on the driving body (2) being movably placed in an operating area of ​​the mounting body (4), and limiting members (5) for limiting the mounting body (4) are provided on side walls on both sides of the operating area, and the mounting position of the limiting members (5) is adjustable.

2. The pin pulling device according to claim 1, characterized in that: An open mounting groove (9) is provided on the mounting body (4), the driving body (2) is fixed on a side wall of the mounting body (4), and a driving rod (3) of the driving body (2) is movably placed in the mounting groove (9).

3. The pin pulling device according to claim 2, characterized in that: The driving body (2) is a hydraulic cylinder, and the driving rod (3) is a cylinder push rod.

4. The pin pulling device according to claim 3, characterized in that: A reversing valve (1) is also installed on the hydraulic oil cylinder, and the reversing valve (1) is connected to the oil cylinder push rod pipeline.

5. The pin pulling device according to claim 3, characterized in that: The oil cylinder push rod is placed in the installation groove (9) and a buffer pad is fixed at one end thereof.

6. The pin pulling device according to claim 2, characterized in that: A plurality of groups of limiting holes (8) are provided on opposite side walls of the installation groove (9), and the limiting member (5) is placed in any group of limiting holes (8).

7. The pin pulling device according to claim 1, characterized in that: The central axis of the driving rod (3) and the central axis of the driving body (2) are arranged colinearly.

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