Multi-specification bolt dismounting tool for confined space use

Abstract

The utility model relates to a tool technical field of dismounting, especially to a multi-specification bolt dismounting tool used in limited space, which comprises: an outer sleeve, an outer sleeve head coaxially arranged on the outer sleeve; an inner sleeve, an inner sleeve head coaxially arranged on the inner sleeve; in the utility model, the sleeve and the sleeve head are coaxially arranged, which rotates around its own axis, greatly reduces the swing radius, and enables the bolt to be dismounted in the limited space. The sleeve is designed into the inner and outer sleeve structure which can be dismounted and has different sizes, when different specification bolts are dismounted, the sleeve is only replaced into the sleeve of corresponding size, and the whole dismounting tool does not need to be frequently replaced, and the dismounting efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of disassembly and assembly tools, and in particular to a multi-specification bolt disassembly and assembly tool for use in confined spaces. Background Technology

[0002] In confined construction sites, such as when installing, maintaining, and periodically inspecting instrument gas heaters and nitrogen heaters, frequently tightening and loosening the bolts is a fundamental and important operation.

[0003] However, the extremely compact design of these heaters results in very small spacing between adjacent bolts and extremely narrow operating space. Currently used conventional wrenches have a large swing radius (moving in an arc around the bolt with the handle as the radius), making them difficult to rotate within the limited space, leading to inconvenience and potential damage to adjacent components. Furthermore, the bolts on the instrument gas heater and nitrogen heater vary in size, and conventional wrenches, due to their fixed dimensions, require frequent wrench changes to accommodate different bolt sizes, significantly reducing disassembly and assembly efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a multi-specification bolt disassembly and assembly tool for use in confined spaces, in order to solve the problems mentioned in the background art.

[0005] The technical solution adopted in this utility model is:

[0006] Multi-size bolt removal and installation tools for use in confined spaces, including:

[0007] An outer sleeve, on which an outer sleeve head is coaxially disposed, the outer sleeve head being matched with a bolt;

[0008] An inner sleeve, on which an inner sleeve head is coaxially provided, the inner sleeve head being matched with the bolt;

[0009] The outer sleeve is detachably fitted onto the outer surface of the inner sleeve;

[0010] The inner diameter of the outer sleeve head is larger than the outer diameter of the inner sleeve head.

[0011] Optionally, one end of the outer sleeve is provided with a first threaded hole, and one end of the inner sleeve is provided with a second threaded hole, the second threaded hole corresponding to the first threaded hole.

[0012] Optionally, the number of the second threaded holes is multiple, and they are distributed at intervals along the axial direction of the inner sleeve.

[0013] Optionally, the length of the outer sleeve is much greater than the length of the inner sleeve.

[0014] Optionally, the outer diameter of the inner sleeve is equal to the outer diameter of the inner sleeve head.

[0015] Optionally, the inner diameter of the outer sleeve head is 40-70mm.

[0016] Optionally, the working surfaces of the outer sleeve head and the inner sleeve head are coated with a diamond-like carbon coating.

[0017] Optionally, the diamond-like carbon coating is applied using a physical vapor deposition process, and its thickness is 2-5 μm.

[0018] Optionally, there may be multiple inner sleeves, and the inner diameter of each inner sleeve may be different.

[0019] Optionally, a handle is provided on the outer sleeve.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] In this utility model, by coaxially aligning the sleeve and sleeve head, allowing them to rotate around their own axis, the swing radius is significantly reduced, enabling the bolts to be assembled and disassembled within a limited space. Furthermore, by designing the sleeve as a detachable inner and outer sleeve structure with different sizes, the assembly and disassembly of bolts of different specifications can be completed simply by replacing the sleeve with the appropriate size, eliminating the need for frequent replacement of the entire assembly and disassembly tool and improving efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of this application;

[0024] Figure 2 for Figure 1 Another schematic diagram of the state structure;

[0025] Figure 3 This is a schematic diagram of the explosive structure of this application.

[0026] Figure label:

[0027] 1. Outer sleeve; 11. First threaded hole;

[0028] 2. Outerwear top;

[0029] 3. Inner sleeve; 31. Second threaded hole;

[0030] 4. Inner sleeve head; 5. Double-ended bolt; 6. Handle. Detailed Implementation

[0031] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0032] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] Currently, conventional wrenches have a large swing radius, making them difficult to rotate in confined spaces, resulting in inconvenient operation and potential damage to adjacent components. Furthermore, the bolts on instrument gas heaters and nitrogen heaters come in various sizes, and conventional wrenches, due to their fixed dimensions, require frequent replacements to accommodate different bolt sizes, significantly reducing disassembly and assembly efficiency.

[0034] like Figures 1-3 As shown, this utility model embodiment provides a multi-specification bolt disassembly and assembly tool for use in confined spaces, including: an outer sleeve 1 and an inner sleeve 3, etc.

[0035] The outer sleeve 1 has a coaxial, integrally formed outer sleeve head 2 at one end, which is used to match the outer circumferential surface of the bolt. The inner sleeve 3 has a coaxial, integrally formed inner sleeve head 4 at one end, which is also used to match the outer circumferential surface of the bolt. The outer sleeve 1 is detachably fitted onto the outer surface of the inner sleeve 3. The inner diameter of the outer sleeve head 2 is larger than the outer diameter of the inner sleeve head 4. When disassembling or assembling bolts, this disassembly and assembly tool rotates around its own axis, greatly reducing the swing radius. Furthermore, this disassembly and assembly tool has sleeves of different sizes, allowing for the disassembly and assembly of bolts of different specifications by changing the sleeves, eliminating the need for frequent replacement of the entire disassembly and assembly tool.

[0036] Specifically, such as Figure 3 As shown, the outer sleeve 1 is fitted with the inner sleeve 3 at one end, through which a first threaded hole 11 is opened. The inner sleeve 3 is adjacent to the outer sleeve 1 at one end, through which a second threaded hole 31 is opened. The second threaded hole 31 corresponds to the first threaded hole 11. The double-ended bolt 5 passes through the first threaded hole 11 and the second threaded hole 31 in sequence, and is then fixed by a nut, thereby realizing the detachable connection of the inner sleeve 3 and the outer sleeve 1.

[0037] Furthermore, the inner sleeve 3 is provided with multiple second threaded holes 31 spaced apart along the axial direction. A double-ended bolt 5 is disposed in the first threaded hole 11 and any one of the second threaded holes 31 to adjust and fix the position of the inner sleeve 3. For example, after adjusting the axial position of the inner sleeve 3, the double-ended bolt 5 is inserted into the first threaded hole 11, and then inserted into the corresponding second threaded hole 31 to fix the axial position of the inner sleeve 3. It can be understood that when the double-ended bolt 5 is inserted into different second threaded holes 31, the length by which the inner sleeve 3 extends or retracts into the outer sleeve 1 varies, thereby achieving the adjustment and fixation of the position of the inner sleeve 3.

[0038] Furthermore, the outer sleeve 1 and the inner sleeve 3 can also be connected by threads, and the position adjustment and fixation of the inner sleeve 3 can be achieved by the relative rotation of the inner sleeve 3 and the outer sleeve 1.

[0039] Furthermore, to make bolt removal and installation easier, in this embodiment, the length of the outer sleeve 1 is much greater than the length of the inner sleeve 3.

[0040] Furthermore, in order to allow the inner sleeve 3 to be easily and quickly fitted into the outer sleeve 1, in this embodiment, the outer diameter of the inner sleeve 3 is equal to the outer diameter of the inner sleeve head 4, that is, the inner sleeve 3 and the inner sleeve head 4 are located on the same plane.

[0041] Preferably, in this embodiment, the inner diameter of the outer sleeve head 2 is 40mm-70mm. Therefore, it can be understood that the inner diameter of the inner sleeve head 4 is less than 40mm-70mm.

[0042] Furthermore, to prevent the outer sleeve head 2 and inner sleeve head 4 from being damaged by friction when in contact with the bolt, which would reduce the fit between the outer sleeve head 2 and inner sleeve head 4 and the bolt, and cause slippage, in this embodiment, a diamond-like carbon coating is applied to the working surfaces of the outer sleeve head 2 and inner sleeve head 4 that mate with the bolt.

[0043] Specifically, the coating is applied using a physical vapor deposition process and has a thickness of 2-5 μm.

[0044] Furthermore, to improve ease of operation, in this embodiment, a handle 6 is provided at the end of the outer sleeve 1 away from the outer sleeve head 2.

[0045] When using this product, first select the appropriate sleeve head according to the bolt size. If the bolt is large, directly fit the outer sleeve head 2 onto the outer circumference of the bolt. Hold the handle 6 and rotate the outer sleeve 1. The outer sleeve 1 drives the outer sleeve head 2 to rotate around its own axis, thus assembling and disassembling the bolt. When disassembling and assembling smaller bolts, insert the inner sleeve 3 into the outer sleeve 1 along its axis and secure it with the double-ended bolt 5. Then, directly fit the inner sleeve head 4 onto the outer circumference of the bolt. Hold the handle 6 and rotate the outer sleeve 1. The outer sleeve 1 drives the inner sleeve head 4 to rotate around its own axis, thus assembling and disassembling the bolt.

[0046] It should be noted that in this embodiment, the figure only shows the installation of one outer sleeve head 2 and one inner sleeve head 4. That is, the structure of one inner sleeve 3 and one outer sleeve 1. Optionally, there can be multiple inner sleeves 3, and the inner diameter of each inner sleeve 3 is different.

[0047] For example, when there are multiple inner sleeves 3, a nested installation method can be used. For instance, if there are two inner sleeves 3, that is, an inner sleeve 3 includes a first inner sleeve and a second inner sleeve, with the second inner sleeve fitted onto the outer surface of the first inner sleeve. An outer sleeve 1 is fitted onto the outer surface of the second inner sleeve. The diameters of the outer sleeve 1, the second inner sleeve, and the first inner sleeve decrease sequentially. The first inner sleeve can extend and retract within the second inner sleeve, and the second inner sleeve can extend and retract within the outer sleeve 1, allowing different sleeves to be used for installing and removing bolts of different sizes.

[0048] In this embodiment, the number of inner sleeves 3 can be designed according to actual needs, such as two, three, four, five or more, and multiple inner sleeves 3 are installed in a nested manner.

[0049] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-specification bolt assembly and disassembly tool for use in confined spaces, characterized in that, include: An outer sleeve has an outer sleeve head coaxially mounted thereon, the outer sleeve head being matched with a bolt; an inner sleeve has an inner sleeve head coaxially mounted thereon, the inner sleeve head being matched with the bolt; the outer sleeve is detachably fitted onto the outer surface of the inner sleeve; the inner diameter of the outer sleeve head is larger than the outer diameter of the inner sleeve head.

2. The multi-specification bolt assembly and disassembly tool for use in confined spaces according to claim 1, characterized in that, One end of the outer sleeve has a first threaded hole, and one end of the inner sleeve has a second threaded hole, the second threaded hole corresponding to the first threaded hole.

3. The multi-specification bolt assembly and disassembly tool for use in confined spaces according to claim 2, characterized in that, The number of the second threaded holes is multiple, and they are distributed at intervals along the axial direction of the inner sleeve.

4. The multi-specification bolt assembly and disassembly tool for use in confined spaces according to claim 1, characterized in that, The length of the outer sleeve is much greater than the length of the inner sleeve.

5. The multi-specification bolt disassembly and assembly tool for use in confined spaces according to claim 1, characterized in that, The outer diameter of the inner sleeve is equal to the outer diameter of the inner sleeve head.

6. The multi-specification bolt disassembly and assembly tool for use in confined spaces according to claim 1, characterized in that, The inner diameter of the outer sleeve head is 40-70mm.

7. The multi-specification bolt disassembly and assembly tool for use in confined spaces according to claim 1, characterized in that, The working surfaces of the outer sleeve head and the inner sleeve head are coated with a diamond-like carbon coating.

8. The multi-specification bolt disassembly and assembly tool for use in confined spaces according to claim 7, characterized in that, The diamond-like carbon coating is applied using a physical vapor deposition process, and its thickness is 2-5 μm.

9. The multi-specification bolt assembly and disassembly tool for use in confined spaces according to claim 1, characterized in that, The number of inner sleeves is multiple, and the inner diameter of each inner sleeve is different.

10. The multi-specification bolt assembly and disassembly tool for use in confined spaces according to claim 1, characterized in that, A handle is provided on the outer sleeve.

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