Pin shaft dismounting tool for crane

Abstract

The utility model provides a pin shaft dismounting tool for a crane, which comprises a pin shaft and a dismounting device, the pin shaft is arranged in a pin shaft mounting seat, and the pin shaft dismounting tool is characterized in that one side of the pin shaft is provided with an assembling hole, the dismounting device comprises a fixed frame and a driving mechanism, the middle part of the fixed frame is provided with a lifting lug, and the driving mechanism is provided with a driving mechanism. The fixing frame is connected with the pin shaft mounting seat, the driving mechanism comprises a chain block and a lifting ring, one end of the chain block is connected with the lifting lug, the other end of the chain block is connected with the assembly hole through the lifting ring, and the lifting device is convenient to operate, safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of crane pin shaft disassembly equipment, in particular to a crane pin shaft disassembly tool. Background Art

[0002] When dismantling the pin shaft of a crane, the following two methods are generally used: using hydraulic equipment such as a jack to push the pin shaft out or using a hammer to hit the pin shaft to push it out. If it is outdoors and there is no hydraulic equipment, using a hammer to hit the pin shaft is inefficient and may cause the pin shaft to get stuck. Therefore, the dismantling work is set on one side of the pin shaft, which only occupies one side of the space and can ensure that the pin shaft moves horizontally during dismantling. In addition, the dismantling work is easy to carry, easy to install and easy to dismantle the pin shaft.

[0003] For example, a one-sided disassembly tool for a pin shaft disclosed in the patent document with patent application number 202320174995.8 and publication date 2023.06.20 relates to the field of industrial technology. The one-sided disassembly tool for a pin shaft comprises a support sleeve and a pin shaft connection device. A protruding bolt is fixed at the central position of the pin shaft connection device. The protruding bolt passes through the center hole of the end plate of the support sleeve and is threadedly connected to the screw nut outside the hole. The whole composed of the protruding bolt and the pin shaft connection device is accommodated in the cylinder of the support sleeve. The diameter of the center hole of the end plate of the support sleeve is larger than the external thread of the protruding bolt and smaller than the outer diameter of the screw nut. It can stably and reliably realize the one-sided disassembly of various types of pin shafts, with high work efficiency, labor saving, light equipment, and simple and easy-to-obtain components. During the disassembly process, the device is always connected to the pin shaft to avoid the danger caused by the pin shaft falling and rolling, thereby ensuring the safety of workers.

[0004] In the above documents, the extended bolt is moved by rotating the screw nut. During use, if the pin shaft mounting seat and the pin shaft are stuck, a large lateral pulling force is required to pull the pin shaft out. The operation depends on the cooperation between the threads on the extended bolt and the screw nut, which is complicated. In addition, the disassembly tooling of the above documents can only be used to disassemble the pin shaft. For large pin shafts, larger bolts are required. For long bolts, deviation or damage in the middle of the screw rod is easy to occur during the bolt fixing process, making it impossible to install the pin shaft. Summary of the Invention

[0005] The utility model provides a pin shaft disassembly tool for a crane, which is convenient for disassembling and installing the pin shaft, has convenient operation, and has good structural stability.

[0006] To achieve the above-mentioned purpose, the technical solution of the utility model is: a pin shaft disassembly tool for a crane, comprising a pin shaft and a disassembly device, the pin shaft being arranged in a pin shaft mounting seat, an assembly hole being arranged on one side of the pin shaft, the disassembly device comprising a fixing frame and a driving mechanism, a lifting ear being arranged in the middle of the fixing frame, the fixing frame being connected to one side of the pin shaft mounting seat, the driving mechanism comprising an electric hoist and a lifting ring, one end of the electric hoist being connected to the lifting ear, the other end of the electric hoist being connected to the assembly hole through the lifting ring, the lifting ear and the assembly hole being symmetrically arranged relative to the axis of the fixing frame.

[0007] The above arrangement is provided by arranging a fixing bracket on one side of the pin shaft mounting seat, the fixing bracket provides support for the driving mechanism, so that the driving mechanism can pull the pin shaft out of the pin shaft mounting seat on the fixing bracket, the fixing bracket is provided with a lifting ear, and the lifting ear provides a connection position for the electric hoist, and an assembly hole is provided on one side of the pin shaft. First, the lifting ring is screwed into the assembly hole so that the lifting ring is connected to the pin shaft, and then one end of the electric hoist is connected to the assembly hole, and then the electric hoist is driven to move so that the movable lifting ring drives the pin shaft to move. The lifting ring provides a connection position for the electric hoist. When the pin shaft needs to be installed, the pin shaft is set on the side of the pin shaft mounting seat away from the fixing bracket, and then one end of the electric hoist is connected to the mounting hole, thereby driving the electric hoist to move and drive the side of the pin shaft provided with the assembly hole to first enter the pin shaft mounting seat and be installed in the pin shaft mounting seat, so that it is only necessary to connect the electric hoist to the assembly hole and then start the electric hoist, which is easy to operate. At the same time, since the lifting ear and the assembly hole are symmetrically arranged relative to the axis of the fixing bracket, it is only necessary to move the electric hoist to achieve reliable movement of the driving pin shaft.

[0008] Furthermore, the assembly hole is arranged at the axis center of the pin shaft.

[0009] With the above arrangement, the pin shaft is aligned with the axis of the assembly hole, thereby reducing stress concentration and imbalance caused by eccentricity. When the lifting lug is connected to the assembly hole, the stability of the connection is enhanced, and loosening of the lifting lug and the assembly hole is prevented.

[0010] Furthermore, the electric hoist is an electric fall chain.

[0011] With the above arrangement, the electric chain fall has a simple structure and is easy to implement.

[0012] Furthermore, the fixing bracket is arranged on one side of the pin shaft mounting seat, and the length of the lifting ear from the pin shaft mounting seat is greater than the length of the pin shaft.

[0013] With the above arrangement, after the fixing frame is connected to the pin mounting seat, when the fall chain pulls out the pin, the pin can be completely pulled out from the pin mounting seat, preventing the pin from being unable to be completely pulled out due to insufficient distance between the fixing frame and the pin mounting seat.

[0014] Furthermore, the electric fall chain is detachably connected to the lifting lug.

[0015] With the above arrangement, when carrying the tooling, the fixing frame can be separated from the electric fall chain, which is convenient for carrying. Moreover, when carrying, the internal structure will not be damaged due to the fall chain provided on the fixing frame. The electric fall chain will be connected to the fixing frame only when in use.

[0016] Furthermore, the electric fall chain is detachably connected to the lifting ring.

[0017] With the above arrangement, the electric fall chain will be connected to the lifting ring only after the lifting ring is connected to the assembly hole, that is, the electric fall chain will be connected to the lifting ring only when the pin shaft needs to be pulled out.

[0018] Furthermore, the length of the electric fall chain is greater than twice the length of the pin shaft.

[0019] With the above settings, the length of the electric fall chain is greater than twice the length of the pin. After the pin is pulled out and the pin is inspected and repaired, the pin can be placed on the side of the pin mounting seat away from the fixing frame, and the assembly hole is located on the side close to the pin mounting seat. The lifting ring is connected to the assembly hole, and the lifting ring is connected to the electric fall chain. The electric fall chain is running, and the pin is moved into the pin mounting seat to complete the installation of the pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 It is a partial structural diagram of the utility model.

[0022] Explanation of the accompanying figures: 1-pin mounting seat, 2-pin; 21 assembly hole; 3-fixing bracket; 31-lifting ear; 4-electric fall chain; 5-lifting ring. DETAILED DESCRIPTION

[0023] like Figure 1-2As shown, a pin shaft disassembly tool for a crane includes a pin shaft 2 and a disassembly device. The pin shaft 2 is arranged in a pin shaft mounting seat 1. An assembly hole 21 is provided on one side of the pin shaft 2. The disassembly device includes a fixing frame 3 and a driving mechanism. A lifting ear 31 is provided in the middle of the fixing frame 3. The fixing frame 3 is connected to the pin shaft mounting seat 1. The driving mechanism includes an electric hoist and a lifting ring 5. One end of the electric hoist is connected to the lifting ear 31, and the other end of the electric hoist is connected to the assembly hole 21 through the lifting ring 5. By arranging the fixing frame 3 on one side of the pin shaft mounting seat 1, the fixing frame 3 provides support for the driving mechanism, so that the driving mechanism can remove the pin shaft 2 from the pin shaft on the fixing frame 3. Pull out from the mounting base 1, the fixing frame 3 is provided with a lifting lug 31, which provides a connection position for the electric hoist. An assembly hole 21 is provided on one side of the pin 2. First, the lifting ring 5 is screwed into the assembly hole 21, so that the lifting ring 5 is connected to the pin 2, so that the movable lifting ring 5 drives the pin 2 to move. The lifting ring 5 provides a connection position for the electric hoist. The assembly hole 21 is located at the axis of the pin 2. The axis positions of the pin 2 and the assembly hole 21 are consistent, thereby reducing stress concentration and imbalance caused by eccentricity. When the lifting lug 31 is connected to the assembly hole 21, the stability of the connection is enhanced, and the lifting lug 31 and the assembly hole 21 are prevented from loosening during connection. In this embodiment, the electric hoist is an electric fall chain 4.

[0024] The assembling hole 21 and the lifting ear 31 have relative axes. After the lifting ring 5 is connected to the assembling hole 21, one end of the electric fall chain 4 is connected to the lifting ring 5, and the other end of the electric fall chain 4 is connected to the lifting ear 31. Since the assembling hole 21 and the lifting ear 31 have relative axes, the two ends of the electric fall chain 4 are on the same horizontal line.

[0025] The fixing bracket 3 is arranged on one side of the pin shaft mounting seat 1, and the length of the lifting ear 31 from the pin shaft mounting seat 1 is greater than the length of the pin shaft 2. After the fixing bracket 3 is connected to the pin shaft mounting seat 1, when the electric fall chain 4 pulls out the pin shaft 2, the pin shaft 2 can be completely pulled out from the pin shaft mounting seat 1, preventing the pin shaft 2 from being unable to be completely pulled out due to insufficient distance between the fixing bracket 3 and the pin shaft mounting seat 1.

[0026] The electric fall chain 4 is detachably connected to the lifting ear 31. When carrying this tool, the fixing frame 3 can be separated from the electric fall chain 4, which is convenient for carrying. When carrying, the internal structure will not be damaged due to the electric fall chain 4 being provided on the fixing frame 3. The electric fall chain 4 will only be connected to the fixing frame 3 when in use.

[0027] The electric fall chain 4 is detachably connected to the lifting ring 5. The electric fall chain 4 will be connected to the lifting ring 5 only after the lifting ring 5 is connected to the assembly hole 21. That is, the electric fall chain 4 will be connected to the lifting ring 5 only when the pin shaft 2 needs to be pulled out.

[0028] The length of the electric fall chain 4 is greater than twice the length of the pin 2. The length of the electric fall chain 4 is greater than twice the length of the pin 2. After the pin 2 is pulled out and the inspection of the pin 2 is completed, the pin 2 can be placed on the side of the pin mounting seat 1 away from the fixing frame 3, and the assembly hole 21 is located close to the side of the pin mounting seat 1. The lifting ring 5 is connected to the assembly hole 21, and the lifting ring 5 is connected to the electric fall chain 4. The electric fall chain 4 is running, and the pin 2 is moved into the pin mounting seat 1 to complete the installation of the pin 2.

[0029] The working principle of the utility model is as follows: the pin shaft 2 is arranged in the pin shaft mounting seat 1, an assembly hole 21 is provided on one side of the pin shaft mounting seat 1, a fixing frame 3 is provided on the side of the pin shaft mounting seat 1 close to the assembly hole 21, and a lifting ear 31 is provided on the fixing frame 3. When the pin shaft 2 needs to be disassembled, the lifting ring 5 is screwed into the assembly hole 21, and then one end of the electric fall chain 4 is connected to the lifting ear 31, and the other end of the electric fall chain 4 is connected to the lifting ring 5. The electric fall chain 4 is operated to pull out the pin shaft 2;

[0030] When the pin 2 needs to be installed, the pin 2 can be placed on the side of the pin mounting seat 1 away from the fixing frame 3, the lifting ring 5 is connected to the assembly hole 21, the lifting ring 5 is connected to the electric fall chain 4, and the electric fall chain 4 runs to drive the pin 2 to move from the side of the pin mounting seat 1 away from the fixing frame 3 to the side close to the fixing frame 3, and the pin 2 is moved into the pin mounting seat 1 to complete the installation of the pin 2.

Claims

1. A pin disassembly tool for a crane, comprising a pin and a disassembly device, wherein the pin is arranged in a pin mounting seat, and is characterized in that: An assembly hole is provided on one side of the pin shaft, and the disassembly device includes a fixing frame and a driving mechanism. The fixing frame is connected to one side of the pin shaft mounting seat, and the driving mechanism includes an electric hoist and a lifting ring. One end of the electric hoist is connected to the lifting ear, and the other end of the electric hoist is connected to the assembly hole through the lifting ring. The lifting ear and the assembly hole are symmetrically arranged relative to the axis of the fixing frame.

2. The pin disassembly tool for a crane according to claim 1, characterized in that: The assembly hole is arranged at the axis center of the pin shaft.

3. The pin disassembly tool for a crane according to claim 1, characterized in that: The electric hoist is an electric fall chain.

4. The pin disassembly tool for a crane according to claim 1, characterized in that: The fixing bracket is arranged on one side of the pin shaft mounting seat, and the length of the lifting ear from the pin shaft mounting seat is greater than the length of the pin shaft.

5. The pin disassembly tool for a crane according to claim 3, characterized in that: The electric fall chain is detachably connected to the lifting lug.

6. The pin disassembly tool for a crane according to claim 3, characterized in that: The electric fall chain is detachably connected to the lifting ring.

7. The pin disassembly tool for a crane according to claim 3, characterized in that: The length of the electric fall chain is greater than twice the length of the pin shaft.

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