Tool for disassembling and assembling common bolt and installing high-locking bolt

Abstract

The utility model relates to a tool for dismounting and mounting a common bolt and mounting a high-locking bolt, which comprises a wrench body, the wrench body comprises a shell, a chain wheel and a chain, the shell comprises a handle and a head shell, and the head shell consists of an anti-slip backing ring and two circular end plates; one end of the chain wheel is a ratchet wheel part with external teeth, and the other end is a locking sleeve with internal teeth; through grooves are formed in the two sides of the anti-skid backing ring, a round through hole is formed in the center of a round end plate on one side of the head shell, the chain wheel is placed in the head shell, the chain wheel and the head shell are rotatably fixed through a bearing, and the locking sleeve stretches out of the round through hole in the round end plate and is used for sleeving a bolt or a high-locking nut. The chain is meshed with the ratchet wheel part of the chain wheel, extends out of the through grooves in the two sides of the anti-skid backing ring and is used for driving the ratchet wheel part of the chain wheel to rotate, and the locking sleeve can rotate along with the ratchet wheel part of the chain wheel, so that screwing operation is conducted. The tool is small in size and suitable for installation scenes with narrow spaces.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware tools, in particular to a tool used for disassembling and assembling common bolts and installing high-locking bolts. Background Art

[0002] When parts fastened with bolts on some equipment need to be replaced, temporarily removed or installed, the bolts need to be removed or installed. Bolts are divided into ordinary bolts and high-strength bolts. The full name of high-strength bolts is high-lock bolts for short. High-lock bolts are a kind of bolts that use the combined effect of the interference fit caused by the interference amount of the bolts and the hole and the higher preload to improve the fatigue strength of the joint. Ordinary bolts rely more on the screw and the hole wall to bear pressure and force, while high-lock bolts use the static friction generated by the applied preload to resist shear force. When it is necessary to install a high-lock bolt, the force required to break the HST79CY series nut indicates that the high-lock bolt has been successfully installed.

[0003] The general bolt disassembly and assembly process is to disassemble and assemble the bolts / install high-lock bolts according to the installation industry specifications of ZPS03670-03900 threaded pins, use a wrench to take the bolt or high-lock nut as the center of the circle, and rotate along the arc tangent direction to screw the bolt / high-lock nut to loosen, tighten / twist off part of the nut to complete the installation. However, when encountering a relatively narrow disassembly and assembly space (for example, when the bolt is located in a narrow groove), the disassembly and assembly process is very difficult to carry out. It takes a lot of time to rotate a tiny angle, and the disassembly and assembly process can only be completed by a high-frequency rotation number. In particular, when installing high-lock bolts, it is necessary to twist off the HST79CY series nuts, but this cannot be completed quickly in a small space, and a long installation time is required, so the efficiency is low. In addition, due to the limited rotation direction and insufficient torsional force, it is easy to fail to completely tighten. When using some existing electric wrenches to install bolts, on the one hand, they cannot adapt well to narrow spaces. On the other hand, due to the narrow space, the installation angle is difficult to align, and the tightening condition of the bolts cannot be observed, which can easily cause thread slippage and also poses the risk of not being able to fully tighten. Summary of the invention

[0004] The purpose of the utility model is to provide a tool that is convenient for disassembling and assembling ordinary bolts and installing high-locking bolts in a narrow space, so as to solve the problems that may occur in the traditional method in a narrow space, such as difficulty in disassembling and assembling bolts, insufficient torsional force, inability to completely tighten, low efficiency, etc., and to improve the efficiency of bolt disassembly and assembly.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows.

[0006] A tool for disassembling and assembling ordinary bolts and installing high-locking bolts, comprises a wrench body, the wrench body comprises an outer shell, a sprocket and a chain, the outer shell comprises a long cylindrical handle and a head shell, the head shell consists of an anti-skid pad ring and two circular end plates, the head shell has a accommodating space inside, and the head shell is fixedly connected to the end of the handle; one end of the sprocket is a ratchet part with external teeth, and the other end is a locking sleeve with internal teeth; through grooves are provided on both sides of the anti-skid pad ring, a circular through hole is provided at the center position of the circular end plate on one side of the head shell, the sprocket is placed in the head shell, the sprocket and the head shell are rotatably fixed by a bearing, the locking sleeve at one end of the sprocket extends from the circular through hole on the circular end plate, and is used to cover the bolt or the high-locking nut; the chain is meshed with the ratchet part of the sprocket, and the chain extends from the through grooves on both sides of the anti-skid pad ring, the chain is used to drive the ratchet part of the sprocket to rotate, and the locking sleeve can rotate with the ratchet part of the sprocket, thereby performing a screwing operation.

[0007] Further, the outer diameter of the ratchet portion is greater than the outer diameter of the locking sleeve.

[0008] Further, the width of the handle is smaller than the width of the head shell.

[0009] Further, the length of the chain is greater than twice the length of the handle. Beneficial Effects

[0010] The disassembly and assembly tool provided by the utility model realizes efficient rotation in a narrow area through a chain-sprocket transmission mechanism in cooperation with a wrench. It is characterized by large torsional force, small size, good spatial adaptability, and high transmission efficiency. It is convenient for stably and quickly disassembling and assembling bolts and pre-installing high-locking nuts on site, thereby improving the disassembly and assembly efficiency of ordinary bolts and the installation efficiency of high-locking bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the overall structure of the tool wrench in the embodiment.

[0012] Figure 2 Schematic diagram of the structure of the housing of the tool wrench in the embodiment.

[0013] Figure 3 Schematic diagram of the structure of the sprocket of the tool wrench in the embodiment.

[0014] Figure 4 Schematic diagram of the connection state between the sprocket and the bearing of the tool wrench in the embodiment.

[0015] Figure 5 Schematic diagram of the connection state between the sprocket and the chain of the tool wrench in the embodiment.

[0016] Figure 6 Schematic diagram of the internal structure of the tool wrench in the embodiment.

[0017] Figure 7 It is a side view structural schematic diagram of the tool wrench in the embodiment.

[0018] Figure 8 It is a schematic diagram comparing the force application directions of the tool wrench in the embodiment and the conventional wrench in the prior art.

[0019] In the figure: 1-wrench body, 2-housing, 3-handle, 4-head housing, 5-anti-slip washer, 6-sprocket, 7-ratchet part, 8-locking sleeve, 9-bearing, 10-chain. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. In the following description, many specific details are set forth to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and therefore, the utility model is not limited to the limitations of the specific embodiments disclosed below.

[0021] like Figure 1 to Figure 7A tool wrench shown in the figure is used for disassembling and assembling ordinary bolts and installing high-locking bolts, including a wrench body 1, wherein the wrench body 1 includes an outer shell 2, a sprocket 6 and a chain 10, wherein the outer shell 2 includes an elongated cylindrical handle 3 and a head shell 4, wherein the width of the handle 3 is smaller than the width of the head shell 4, and the axis of the handle 3 is located on the same straight line as the center line of the head shell 4, and the head shell 4 is composed of an anti-slip gasket ring 5 and two circular end plates, and the anti-slip gasket ring 5 and the two circular end plates can be connected by bolt fixing or the like. There is a accommodating space inside the head shell 4, and the head shell 4 is fixedly connected to the end of the handle 3; one end of the sprocket 6 is a ratchet part 7 with external teeth, and the other end is a locking sleeve 8 with internal teeth, and the outer diameter of the ratchet part 7 is larger than the outer diameter of the locking sleeve 8; through grooves are provided on both sides of the anti-slip gasket 5, and a circular through hole is provided at the center position of the circular end plate on one side of the head shell 4. The sprocket 6 is placed in the head shell 4, and the sprocket 6 and the head shell 4 are rotatably fixed through a bearing 9, that is, the outer ring of the bearing 9 is fixedly connected to the center hole of the sprocket 6, and the inner ring of the bearing 9 is fixedly connected to a circular end plate of the head shell 4 through a fixed shaft. The sprocket 6 can rotate around the axis in the head shell 4, and the locking sleeve 8 at one end of the sprocket 6 extends from the circular through hole on the circular end plate to cover a bolt or a high lock nut, and the locking sleeve 8 can rotate with the ratchet part 7 of the sprocket 6 to perform a screwing operation. The chain 10 is meshed with the ratchet portion 7 of the sprocket 6, and the chain 10 extends from the through grooves on both sides of the anti-skid pad ring 5. The length of the chain 10 is long enough, and the length of the chain 10 is at least twice the length of the handle 3. Chains of different lengths can be selected for use according to actual conditions. When the end of the chain 10 is manually pulled, the chain 10 drives the sprocket 6 to rotate in a translational manner, thereby applying torque to the bolts or high-locking nuts locked by the locking sleeve 8, and disassembling and assembling ordinary bolts or installing high-locking bolts. For the installation of high-locking bolts, this tool wrench can be used as a pre-installation tool, and finally a final tightening force can be applied through a conventional wrench to twist off the nut, saving the initial twisting stroke, and is suitable for installation scenarios in narrow spaces where conventional wrenches are inconvenient to operate.

[0022] The locking sleeve 8 and the ratchet part 7 can also be connected in a detachable manner, which is convenient for replacing the locking sleeve 8. The locking sleeve 8 that the wrench body 1 can adapt to has the following specifications: 1 / 4", 5 / 16", 3 / 8", 7 / 16", / 1 / 2", 9 / 16", 5 / 8", and the wrench body 1 can adapt to bolts or nuts of different diameters by replacing locking sleeves 8 of different diameters (inner diameters).

[0023] In this embodiment, the chain 10 adopts an A series chain with a pitch P of 4.7626 mm, a roller diameter of 2.48 mm, and a pin diameter of 1.62 mm.

[0024] When using the tool wrench of the utility model to disassemble and assemble bolts, the locking sleeve 8 at the outer end of the sprocket 6 is sleeved on the bolt or high lock nut, and the sprocket 6 is driven to rotate by pulling the chain 10. The inner teeth inside the locking sleeve 8 of the sprocket 6 are locked and drive the bolt or high lock nut to rotate, thereby realizing the disassembly and assembly function. Figure 8 As shown, when a conventional wrench is screwed, it rotates a certain angle along the arc tangent direction with the bolt / nut as the center point. The rotation stroke is large, and the screwing direction is limited in a narrow space. It is necessary to constantly adjust the wrench position and pull the wrench back frequently to exchange for a small rotation angle in order to screw the bolt / high-lock nut, which is inefficient; while the driving force of the tool wrench of the utility model is a translation along the extension line direction of the chain 10, which changes the direction of the force applied when screwing, solves the problem of conventional wrenches having difficulty rotating in a narrow space area and insufficient torsional force, and improves the disassembly and assembly efficiency of ordinary bolts and the installation efficiency of high-lock bolts. At the same time, when using the tool wrench of the utility model, the operator can feel the force applied to the bolt or nut very well, and it is not easy to slip.

Claims

1. A tool for disassembling and assembling ordinary bolts and installing high-lock bolts, comprising a wrench body, characterized in that: The wrench body includes an outer shell, a sprocket and a chain, the outer shell includes a handle and a head shell, the head shell is composed of an anti-skid pad ring and two circular end plates, the head shell has a accommodating space inside, and the head shell is fixedly connected to the end of the handle; one end of the sprocket is a ratchet part with external teeth, and the other end is a locking sleeve with internal teeth; through grooves are provided on both sides of the anti-skid pad ring, and a circular through hole is provided at the center position of the circular end plate on one side of the head shell, the sprocket is placed in the head shell, and the sprocket and the head shell are rotatably fixed by bearings, and the locking sleeve at one end of the sprocket extends from the circular through hole on the circular end plate to cover the bolt or high lock nut; the chain is meshed with the ratchet part of the sprocket, and the chain extends from the through grooves on both sides of the anti-skid pad ring, the chain is used to drive the ratchet part of the sprocket to rotate, and the locking sleeve can rotate with the ratchet part of the sprocket, thereby performing a screwing operation.

2. The tool for disassembling and assembling common bolts and installing high-locking bolts according to claim 1, characterized in that: The outer diameter of the ratchet portion is greater than the outer diameter of the locking sleeve.

3. The tool for disassembling and assembling common bolts and installing high-lock bolts according to claim 2, characterized in that: The width of the handle is smaller than the width of the head housing.

4. The tool for disassembling and assembling common bolts and installing high-locking bolts according to claim 1, characterized in that: The length of the chain is greater than twice the length of the handle.

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