Tool and method for mounting and dismounting hinge pin of crane jib frame

Abstract

The invention relates to the technical field of marine large cranes, in particular to a crane arm support pin shaft mounting and dismounting tool which is composed of a pin shaft supporting plate, a flange, a pressing plate, a middle screw rod, a screw plug, a supporting steel ball, a supporting screw rod, a seamless steel pipe, a middle nut and two adjusting bolts. In the dismounting and mounting process, the pin shaft supporting plate, the flange, the pressing plate, the middle screw rod, the supporting screw rod, the seamless steel pipe and the two adjusting bolts are utilized to form a simple gantry type mounting frame, the middle screw rod is rotated, the middle screw rod is in threaded connection with the middle nut, and the middle nut is limited by the middle nut limiting plate. And the middle screw rod bears the pressure of the pin shaft during installation and bears the pull of the pin shaft during disassembly, so that the pin shaft is disassembled and assembled, and therefore, the device has the effects of safety, convenience, simple and compact structure, time saving and labor saving.

Description

Technical Field

[0001] The invention relates to the technical field of large-scale ship cranes, and in particular to a tool and method for installing and disassembling a pin shaft of a crane boom. Background Art

[0002] The arm and the ear plate of the large marine crane are connected by a pin, which is one of the main load-bearing parts. Because bench tests need to be carried out within the company, installation is required. After the test, the tower, arm and pin still need to be disassembled and shipped separately for easy transportation. When it is installed in the shipyard, it needs to be installed again.

[0003] The arm bearing and the pin shaft generally adopt a transition fit. The installation of the pin shaft is limited by the space conditions on the ship, and is often installed and disassembled by manual alignment and knocking of copper rods. It requires 2-3 people to cooperate in the operation. The heavy pin shaft cannot be moved manually, and a crane is needed for installation and disassembly, which is labor-intensive and time-consuming.

[0004] In summary, the present invention solves the existing problems by designing a tool and method for installing and disassembling a pin shaft of a crane boom. Summary of the invention

[0005] The object of the present invention is to provide a tool and method for installing and disassembling a crane boom pin shaft to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A tool for installing and removing the pin shaft of a crane boom frame is composed of a pin shaft support plate, a flange, a pressure plate, a middle screw, a screw plug, a support steel ball, a support screw, a seamless steel pipe, a middle nut and two adjusting bolts. The end surface of the pin shaft support plate is connected with a flange. One end of the support screw passes through the pressure plate, the seamless steel pipe and the flange in sequence from bottom to top, and extends to the other side of the flange and is threadedly connected to the inside of a screw hole opened on a tower body ear plate. A detachable pin shaft is installed in the tower body ear plate, wherein the pin shaft is bare. A threaded hole is provided at the center of the outer wall exposed to the environment, and the two support screws are symmetrically threadedly connected to the opposite side walls of the pin support plate. A central through hole of the pressure plate is provided at the center of the pressure plate and corresponds to the threaded hole. A middle nut limiting plate is symmetrically arranged on the side wall of the pressure plate based on the central through hole of the pressure plate as the axis, wherein the middle nut is clamped between the two groups of middle nut limiting plates, and one end of the middle screw passes through the central through hole of the pressure plate and the middle nut from bottom to top in sequence and extends to the other side of the middle nut.

[0008] As a preferred solution of the present invention, two support screws and two seamless steel pipes are respectively provided, wherein four flange through holes are provided on the flange corresponding to the support screws, and two pressure plate through holes are provided on the pressure plate corresponding to the support screws.

[0009] As a preferred solution of the present invention, the flange through hole has the same size as the pressure plate through hole, the inner diameter of the pressure plate through hole is larger than the nominal diameter of the support screw, and the inner diameter of the seamless steel pipe is larger than the inner diameter of the pressure plate through hole.

[0010] As a preferred solution of the present invention, the inner diameter of the central through hole of the pressure plate is larger than the nominal diameter of the middle screw, and the nominal diameter of the middle screw is larger than the nominal diameter of the support screw.

[0011] As a preferred solution of the present invention, the pin support plate is a "V"-shaped plate, wherein two adjusting bolts are symmetrically threadedly connected to the side walls of the "V"-shaped plate, and one ends of the two adjusting bolts respectively penetrate through the side walls of the "V"-shaped plate and extend into the inner cavity of the "V"-shaped plate, and the inner cavity of the "V"-shaped plate is arranged corresponding to the pin.

[0012] As a preferred solution of the present invention, the middle screw rod and the screw plug have the same nominal diameter, and a slot is provided at the end of the middle screw rod corresponding to the supporting steel ball, wherein the supporting steel ball is assembled inside the slot, and the screw plug is threadedly connected to the threaded hole opened on the pin shaft.

[0013] A method for installing and removing a tool for a crane boom pin shaft, the specific steps are as follows:

[0014] When installing the pin shaft, the middle screw is connected with a screw plug through a supporting steel ball, wherein the screw plug is threadedly connected to the threaded hole opened on the pin shaft. After the tower body is hoisted and installed on the base column, the bearing seats on both sides of the arm are placed inside the tower body flange. An assembler fine-tunes the two adjustment bolts, installs the screw plug and the supporting steel ball on the pin shaft, aligns the flange mounting hole, and one end of the supporting screw rod passes through the pressing plate, seamless steel pipe and flange from bottom to top in sequence, and extends to the other side of the flange and is threadedly connected to the screw hole opened on the ear plate of the tower body. The pin shaft can be easily pressed in using the middle screw rod, and then installed in the same way from the other side.

[0015] When the pin shaft is disassembled, the middle screw is threadedly connected to the threaded hole opened in the pin shaft, one end of the supporting screw passes through the pressure plate, seamless steel pipe and flange from bottom to top, and extends to the other side of the flange and is threadedly connected to the screw hole opened in the ear plate of the tower body. The middle screw is screwed into the pin shaft, and the middle screw is pressed and fixed. You only need to tighten the middle screw and use the supporting force of the pressure plate to easily pull out the pin shaft.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the present invention, by designing the installation and disassembly tooling of the crane boom pin shaft, during the process of disassembly and installation, a simple gantry type installation frame is composed of a pin shaft support plate, a flange, a pressure plate, a middle screw, a support screw, a seamless steel pipe and two adjusting bolts. Then, by rotating the middle screw, the middle screw is threadedly connected with a middle nut, and the middle nut limiting plate limits the middle nut. Under the condition, the middle screw bears pressure on the pin shaft during installation and bears tension on the pin shaft during disassembly, thereby disassembling and assembling the pin shaft. Therefore, the present invention has the effects of safety, convenience, simple structure, compactness, time saving and labor saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the pin shaft of the present invention in a disassembled state;

[0019] Figure 2 This is a schematic diagram of the structure of the pin shaft installation state of the present invention;

[0020] Figure 3 For the present invention Figure 2 A schematic diagram of a partial top-down perspective structure;

[0021] Figure 4 This is a schematic diagram of the pin support plate structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the flange structure of the present invention;

[0023] Figure 6 It is a schematic diagram of the pressing plate structure of the present invention.

[0024] In the figure: 1. Pin support plate; 2. Flange; 3. Pressure plate; 4. Middle screw; 5. Screw plug; 6. Support steel ball; 7. Support screw; 8. Seamless steel pipe; 9. Middle nut; 10. Adjusting bolt; 11. Tower ear plate; 12. Pin; 13. Center through hole of pressure plate; 14. Middle nut limiting plate; 15. Flange through hole; 16. Pressure plate through hole. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] For examples, see Figure 1-6 , the present invention provides a technical solution:

[0030] A tool for installing and removing a pin shaft of a crane boom frame is composed of a pin shaft support plate 1, a flange 2, a pressure plate 3, a middle screw rod 4, a screw plug 5, a support steel ball 6, a support screw rod 7, a seamless steel pipe 8, a middle nut 9 and two adjusting bolts 10. The end surface of the pin shaft support plate 1 is connected with a flange 2. One end of the support screw rod 7 passes through the pressure plate 3, the seamless steel pipe 8 and the flange 2 in sequence from bottom to top, and extends to the other side of the flange 2 and is threadedly connected to the inside of a screw hole opened on a tower body ear plate 11. A detachable pin shaft 12 is installed in the tower body ear plate 11. A threaded hole is provided at the center of the outer wall of the pin shaft 12 exposed to the environment, and two supporting screws 7 are symmetrically threadedly connected to the opposite side walls of the pin shaft supporting plate 1. A central through hole 13 of the pressure plate is provided at the center of the pressure plate 3 and corresponds to the threaded hole. A middle nut limiting plate 14 is symmetrically arranged on the side wall of the pressure plate 3 based on the central through hole 13 of the pressure plate as the axis, wherein the middle nut 9 is clamped between the two groups of middle nut limiting plates 14, and one end of the middle screw 4 passes through the central through hole 13 of the pressure plate and the middle nut 9 from bottom to top in sequence and extends to the other side of the middle nut 9.

[0031] As a further preferred solution of the present invention, two support screws 7 and two seamless steel pipes 8 are respectively provided, wherein four flange through holes 15 are provided on the flange 2 and corresponding to the support screws 7, and two pressure plate through holes 16 are provided on the pressure plate 3 and corresponding to the support screws 7.

[0032] As a further preferred solution of the present invention, the flange through hole 15 has the same size as the pressure plate through hole 16 , the inner diameter of the pressure plate through hole 16 is larger than the nominal diameter of the support screw 7 , and the inner diameter of the seamless steel pipe 8 is larger than the inner diameter of the pressure plate through hole 16 .

[0033] As a further preferred solution of the present invention, the inner diameter of the central through hole 13 of the pressure plate is larger than the nominal diameter of the middle screw 4 , and the nominal diameter of the middle screw 4 is larger than the nominal diameter of the support screw 7 .

[0034] As a further preferred scheme of the present invention, the pin support plate 1 is a "V"-shaped plate, wherein two adjusting bolts 10 are symmetrically threadedly connected to the side walls of the "V"-shaped plate, and one ends of the two adjusting bolts 10 respectively penetrate through the side walls of the "V"-shaped plate and extend into the inner cavity of the "V"-shaped plate, and the inner cavity of the "V"-shaped plate is arranged corresponding to the pin 12.

[0035] As a further preferred solution of the present invention, the middle screw rod 4 and the screw plug 5 have the same nominal diameter, and a slot is provided at the end of the middle screw rod 4 corresponding to the supporting steel ball 6, wherein the supporting steel ball 6 is assembled inside the slot, and the screw plug 5 is threadedly connected to the threaded hole opened in the pin shaft 12.

[0036] Workflow of the present invention:

[0037] like Figure 2 and Figure 3 , when installing the pin shaft 12, the middle screw rod 4 is connected with the screw plug 5 through the supporting steel ball 6, wherein the screw plug 5 is threadedly connected to the threaded hole opened in the pin shaft 12. After the tower body is hoisted and installed on the base column, the bearing seats on both sides of the arm are placed inside the tower body flange. An assembler fine-tunes the two adjusting bolts 10, and the screw plug 5 and the supporting steel ball 6 are installed on the pin shaft 12, and the mounting hole of the flange 2 is aligned. One end of the supporting screw rod 7 passes through the pressing plate 3, the seamless steel pipe 8 and the flange 2 from bottom to top in sequence, and extends to the other side of the flange 2 and is threadedly connected to the screw hole opened on the ear plate 11 of the tower body. The pin shaft 12 can be easily pressed into the middle screw rod 4, and then installed from the other side in the same way;

[0038] like Figure 1 When the pin shaft 12 is disassembled, the middle screw rod 4 is threadedly connected to the threaded hole opened in the pin shaft 12, and one end of the support screw rod 7 passes through the pressing plate 3, the seamless steel pipe 8 and the flange 2 from bottom to top, and extends to the other side of the flange 2 and is threadedly connected to the screw hole opened on the ear plate 11 of the tower body. The middle screw rod is screwed into the pin shaft 12, and the middle screw rod 4 is pressed and fixed. It only needs to tighten the middle screw rod 4, and the pin shaft 12 can be easily pulled out by using the supporting force of the pressing plate 3;

[0039] This process is achieved by designing a tool for installing and disassembling the pin shaft of the crane boom. During the disassembly and installation process, a simple gantry type installation frame is composed of a pin shaft support plate 1, a flange 2, a pressure plate 3, a middle screw rod 4, a support screw rod 7, a seamless steel pipe 8 and two adjusting bolts 10. Then, by rotating the middle screw rod 4, under the condition that the middle screw rod 4 is threadedly connected with a middle nut 9 and the middle nut limiting plate 14 limits the middle nut 9, the middle screw rod 4 bears pressure on the pin shaft 12 during installation and bears tension on the pin shaft 12 during disassembly, thereby disassembling and assembling the pin shaft 12. Therefore, it is safe, convenient, simple in structure, compact, and saves time and effort.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tool for installing and removing a pin of a crane boom, comprising a pin support plate (1), a flange (2), a pressure plate (3), a middle screw (4), a screw plug (5), a support steel ball (6), a support screw (7), a seamless steel pipe (8), a middle nut (9) and two adjusting bolts (10), characterized in that: A flange (2) is connected to the end surface of the pin support plate (1), one end of the support screw (7) passes through the pressure plate (3), the seamless steel pipe (8) and the flange (2) in sequence from bottom to top, and extends to the other side of the flange (2) and is threadedly connected to the inside of a screw hole opened on the tower ear plate (11), a detachable pin (12) is installed in the tower ear plate (11), wherein a threaded hole is opened at the center of the outer wall of the pin (12) exposed to the environment, and two support screws (7) are symmetrically threadedly connected to the pin. On the opposite side wall of the shaft support plate (1), a central through hole (13) of the pressure plate (3) is opened at the center and corresponding to the threaded hole, and a middle nut limiting plate (14) is symmetrically arranged on the side wall of the pressure plate (3) based on the central through hole (13) of the pressure plate as the axis, wherein the middle nut (9) is clamped between two groups of middle nut limiting plates (14), and one end of the middle screw rod (4) passes through the central through hole (13) of the pressure plate and the middle nut (9) from bottom to top in sequence and extends to the other side of the middle nut (9).

2. The tool for installing and removing the pin shaft of a crane boom according to claim 1, characterized in that: The support screw (7) and the seamless steel pipe (8) are provided in pairs respectively, wherein four flange through holes (15) are provided on the flange (2) and correspond to the support screw (7), and two pressure plate through holes (16) are provided on the pressure plate (3) and correspond to the support screw (7).

3. A crane boom pin installation and removal tool and method according to claim 2, characterized in that: The flange through hole (15) and the pressure plate through hole (16) have the same size, the inner diameter of the pressure plate through hole (16) is larger than the nominal diameter of the support screw (7), and the inner diameter of the seamless steel pipe (8) is larger than the inner diameter of the pressure plate through hole (16).

4. The tool for installing and removing the pin shaft of a crane boom according to claim 3, characterized in that: The inner diameter of the central through hole (13) of the pressure plate is larger than the nominal diameter of the middle screw (4), and the nominal diameter of the middle screw (4) is larger than the nominal diameter of the support screw (7).

5. The tool for installing and removing the pin shaft of a crane boom according to claim 4, characterized in that: The pin support plate (1) is a "V"-shaped plate, wherein two adjusting bolts (10) are respectively symmetrically threadedly connected to the side walls of the "V"-shaped plate, and one end of the two adjusting bolts (10) respectively penetrates the side walls of the "V"-shaped plate and extends into the inner cavity of the "V"-shaped plate, and the inner cavity of the "V"-shaped plate is correspondingly arranged with the pin (12).

6. The tool for installing and removing the pin shaft of a crane boom according to claim 5, characterized in that: The middle screw rod (4) and the screw plug (5) have the same nominal diameter, and a slot is provided at the end of the middle screw rod (4) corresponding to the supporting steel ball (6), wherein the supporting steel ball (6) is assembled inside the slot, and the screw plug (5) is threadedly connected inside the threaded hole opened in the pin shaft (12).

7. According to claim 6, a method for installing and removing a crane boom pin, the specific steps are as follows: When installing the pin shaft (12), the middle screw rod (4) is connected to the screw plug (5) through the supporting steel ball (6), wherein the screw plug (5) is threadedly connected to the threaded hole opened on the pin shaft (12). After the tower body is hoisted and installed on the base column, the bearing seats on both sides of the arm are placed inside the tower body flange, and an assembler fine-tunes the two adjustment bolts (10). The screw plug (5) and the supporting steel ball (6) are installed on the pin shaft (12), and the mounting hole of the flange (2) is aligned. One end of the supporting screw rod (7) passes through the pressing plate (3), the seamless steel pipe (8) and the flange (2) from bottom to top in sequence, and extends to the other side of the flange (2) and is threadedly connected to the screw hole opened on the tower body ear plate (11). The pin shaft (12) can be easily pressed into the middle screw rod (4), and then installed from the other side in the same way; When the pin shaft (12) is disassembled, the middle screw rod (4) is threadedly connected to the threaded hole opened in the pin shaft (12), one end of the support screw rod (7) passes through the pressing plate (3), the seamless steel pipe (8) and the flange (2) from bottom to top in sequence, and extends to the other side of the flange (2) and is threadedly connected to the screw hole opened on the tower body ear plate (11), the middle screw rod is screwed into the pin shaft (12), and the middle screw rod (4) is pressed and fixed. It only needs to tighten the middle screw rod (4) and use the supporting force of the pressing plate (3) to easily pull out the pin shaft (12).

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