Chain wrench

Abstract

The utility model relates to the technical field of mechanical maintenance, and discloses a chain wrench which comprises a rod body provided with a fixing part. The chain body comprises a chain body, a fixed end and a free end, the fixed end and the free end are located on the two sides of the chain body respectively, the fixed end is detachably connected with the rod body in a sliding mode, the fixed end can move in the extending direction of the rod body, and the fixed part is used for being connected with the chain body; and a screwing part for screwing a screwed piece is formed between the joint of the chain body and the fixed part and the fixed end. If an overlarge gap exists between the screwing part and the outer wall of the screwed piece, the free end can be wound around the chain body again, and if the gap still cannot be eliminated, the relative position between the screwing part and the outer wall of the screwed piece can be adjusted again by adjusting the position of the fixed end relative to the rod body; the adjusting efficiency of the gap between the screwing part and the outer wall of the screwed part is improved in a bidirectional adjusting mode, so that the working reliability of the chain wrench is guaranteed, and the working efficiency of the chain wrench is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical maintenance, and particularly relates to a chain wrench. Background Art

[0002] A wrench is a common tool in the field of mechanical maintenance, and there are various forms of it. The chain wrench is one of them.

[0003] In the existing chain wrench, one end of the chain is a fixed end, which is fixed to the wrench body. When in use, the operator holds the free end of the chain, winds the chain around the outer wall of the part to be screwed, and then performs the screwing. However, if there is too large a gap between the chain and the outer wall of the part to be screwed after winding, it can only be adjusted by rewinding the chain. Moreover, affected by the shape and size of the part to be screwed, the influence of the gap on the screwing may not be overcome after adjustment, and the operation is very inconvenient, reducing the work efficiency.

[0004] Therefore, how to improve the adjustment efficiency of the gap between the chain wrench and the part to be screwed has become an urgent technical problem in this field. Content of the Utility Model

[0005] The purpose of the utility model is to at least solve the problem of how to improve the adjustment efficiency of the gap between the chain wrench and the part to be screwed. This purpose is achieved by the following technical solutions:

[0006] In a first aspect, the utility model provides a chain wrench, which comprises:

[0007] A rod body having a fixing part; and

[0008] A chain body, which includes a chain body, a fixed end and a free end respectively located on both sides of the chain body. The fixed end is detachably and slidably connected to the rod body, and the fixed end can move along the extending direction of the rod body. The fixing part is used for connecting with the chain body. In the chain body, a screwing part for screwing the part to be screwed is formed between the connection part of the chain body and the fixing part and the fixed end.

[0009] When using this chain wrench, first fix the fixed end of the chain body relative to the rod body, then the operator holds the free end of the chain body to wrap the chain body around the outer wall of the screwed part, and fixes the fixed part to a certain part of the chain body according to the actual working conditions, until the screwing part and the outer wall of the screwed part are tightly fitted, and then screwing can begin; if there is too much gap between the screwing part and the outer wall of the screwed part, the free end can be rewound around the chain body, and if the gap still cannot be eliminated, the relative position between the screwing part and the outer wall of the screwed part can be readjusted by adjusting the position of the fixed end relative to the rod body, and the adjustment efficiency of the gap between the screwing part and the outer wall of the screwed part can be improved by two-way adjustment, thereby ensuring the working reliability of the chain wrench and improving the working efficiency of the chain wrench.

[0010] In some embodiments of the utility model, the chain wrench further includes a fastening assembly; the rod body includes a first portion and a second portion, the first portion and the second portion are connected end to end and both extend along a first direction, the first portion is provided with a slide groove extending along the first direction, and the fixed end is fixed to the slide groove by the fastening assembly.

[0011] In some embodiments of the present utility model, the fixing portion is a hook, and the hook is used to be connected with the chain body.

[0012] In some embodiments of the present invention, the hook is disposed on a side of the first portion away from the second portion.

[0013] In some embodiments of the present utility model, the width of the chain body is 5mm-10mm.

[0014] In some embodiments of the present invention, the chain body includes at least two superimposed sub-chains.

[0015] In some embodiments of the utility model, the first portion is provided with a scale, and the scale extends along the first direction.

[0016] In some embodiments of the utility model, the second portion is provided with a buckle, and the buckle is used to connect with the free end of the chain body.

[0017] In some embodiments of the present invention, the second part has a cavity inside, and the cavity is used to accommodate a screwdriver.

[0018] In some embodiments of the utility model, an end of the second part away from the first part is provided with an opening connected to the cavity, the inner wall of the cavity near the opening is provided with an internal thread, and the outer wall of the screwdriver handle is provided with an external thread matching the internal thread.

[0019] The above description is only an overview of the technical solution of this application. In order to understand the technical means of this application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of this application more obvious and understandable, the following specific embodiments of this application are specifically given. Brief Description of the Drawings

[0020] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to denote the same components. In the drawings:

[0021] Figure 1 is a schematic structural diagram of a chain wrench provided by an embodiment of the present utility model;

[0022] Figure 2 is an exploded view of a partial structure of a chain wrench provided by an embodiment of the present utility model.

[0023] The reference numerals are as follows:

[0024] 100, chain wrench;

[0025] 1, rod body; 11, first part; 111, fixing part; 112, sliding groove; 113, scale; 12, second part; 121, buckle;

[0026] 2, chain body; 21, fixed end; 22, free end; 23, chain body;

[0027] 3, fastening assembly;

[0028] 4, screwdriver; 41, handle, 411, external thread. Detailed Embodiments

[0029] The following will describe the exemplary embodiments of the present disclosure in more detail with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0030] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an execution order is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0031] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms when used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0032] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature, such as "inner", "outer", "inside", "outside", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can include both the above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are to be interpreted accordingly.

[0033] Figure 1 The structural schematic diagram of the chain wrench provided for the embodiments of the present utility model is as Figure 1As shown in the figure, an embodiment of the present utility model provides a chain wrench 100, which includes: a rod body 1 having a fixing portion 111; and a chain body 2, the chain body 2 includes a chain body 23 and a fixed end 21 and a free end 22 respectively located on both sides of the chain body 23. The fixed end 21 is detachably and slidably connected to the rod body 1, and the fixed end 21 can move along the extending direction of the rod body 1. The fixing portion 111 is used to connect with the chain body 23; in the chain body 2, a screwing portion for screwing the screwed member is formed between the connection portion of the chain body 23 and the fixing portion 111 and the fixed end 21.

[0034] Among them, it is easy to understand that the screwing portion is the part of the chain wrench 100 that wraps around the outer wall of the screwed member during screwing.

[0035] In this embodiment, when using this chain wrench 100, first fix the fixed end 21 of the chain body 2 relative to the rod body 1, and then the operator holds the free end 22 of the chain body 2 to wrap the chain body 23 around the outer wall of the screwed member, and fixedly connect the fixing portion 111 to a certain part of the chain body 23 according to the actual working conditions until the screwing portion is closely attached to the outer wall of the screwed member, then the screwing can start; if there is too large a gap between the screwing portion and the outer wall of the screwed member, the chain body 23 can be re-wrapped by the free end 22. If this gap still cannot be eliminated, the relative position between the screwing portion and the outer wall of the screwed member can also be re-adjusted by adjusting the position of the fixed end 21 relative to the rod body 1.

[0036] Therefore, this chain wrench 100 provided in this embodiment can improve the adjustment efficiency of the gap between the screwing portion and the outer wall of the screwed member by means of two-way adjustment (that is, it can be adjusted from the free end 22 of the chain body 2 or from the fixed end 21 of the chain body 2), thereby ensuring the working reliability of the chain wrench 100 and improving the working efficiency of the chain wrench 100.

[0037] Reference Figure 1 , according to an optional embodiment of the present utility model, the chain wrench 100 further includes a fastening assembly 3; the rod body 1 includes a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 are connected end to end and both extend along the first direction. A chute 112 extending along the first direction is provided on the first portion 11, and the fixed end 21 is fixed to the chute 112 through the fastening assembly 3.

[0038] Among them, it is easy to understand that the fastening assembly 3 may include a screw and a nut. By passing the screw through the fixed end 21 and the chute 112 in sequence and then tightening the screw with the nut, the fixing of the fixed end 21 relative to the chute 112 can be realized. Or, the fastening assembly may include a cylindrical nail. The cylindrical nail passes through the fixed end 21 and the chute 112 in sequence and is in interference fit with the chute, which can also realize the fixing of the fixed end 21 relative to the chute 112.

[0039] In this embodiment, when there is an excessive gap between the screwing part and the outer wall of the screwed part during the use of the chain wrench 100, the fastening component 3 can be loosened, and the position of the fixed end 21 in the sliding groove 112 can be adjusted in the first direction until the position meets the requirement of eliminating the gap between the outer walls of the screwed parts, and then the fixed end 21 can be fixed to the sliding groove 112 through the fastening component 3.

[0040] Therefore, the setting method of the fastening component 3 is simple in structure and convenient to operate, facilitating the adjustment of the position of the fixed end 21 of the chain body 2.

[0041] As Figure 1 shown, according to an optional embodiment of the present invention, the fixing part 111 is a hook, and the hook is used for clamping with the chain body 23. Specifically, the hook is arranged on the side of the first part 11 away from the second part 12.

[0042] In this embodiment, the way of clamping the hook with the chain body 23 is convenient to operate, simple in structure and reliable in connection. While saving costs, it also ensures the working efficiency of the chain wrench 100.

[0043] According to an optional embodiment of the present invention, the width of the chain body 2 is 5 mm - 10 mm.

[0044] Wherein, the definition of the width direction of the chain body 2 is: when the chain body 2 is wound around the outer wall of the screwed part, the width direction of the chain body 2 (i.e., the screwing part) wound around the outer wall of the screwed part is the radial direction of the screwed part.

[0045] Since in some working conditions, the chain body 2 with too large a width cannot be wound around the outer wall of the screwed part; for example, when the screwed part is a multi - stage filter element, the gap between adjacent filter elements in the multi - stage filter element is small, and the too - wide chain body 2 is difficult to penetrate into this gap.

[0046] Therefore, in this embodiment, the width of the chain body 2 is set to 5 mm - 10 mm, such as 7 mm, so that the chain wrench 100 can adapt to the screwed parts with a small operating space.

[0047] According to an optional embodiment of the present invention, the chain body 2 includes at least two sub - chains arranged in an overlapping manner.

[0048] In this embodiment, the way of arranging multiple sub - chains in an overlapping manner can increase the contact area between the screwing part and the screwed part, thereby improving the firmness during screwing to a certain extent, and further ensuring the working efficiency of the chain wrench 100.

[0049] Referring to Figure 1 , according to an optional embodiment of the present invention, the first part 11 is provided with a scale 113, and the scale 113 extends in the first direction.

[0050] Among them, it is easy to understand that an edge of the first part 11 can be set to be straight, and a scale bar can be set at this edge, so as to obtain the scale 113.

[0051] In this embodiment, if it happens to be necessary to measure the size during the operation, there is no need to replace other tools, and the chain wrench 100 can be directly used for measurement, which increases the application scenarios of the chain wrench 100 to a certain extent.

[0052] Continue to refer to Figure 1 , according to an optional embodiment of the present invention, the second part 12 is provided with a buckle 121, and the buckle 121 is used to connect with the free end 22 of the chain body 2.

[0053] In this embodiment, it is easy to understand that the buckle 121 can be arranged on the side wall of the second part 12 far away from the first part 11, so as to facilitate the storage of the free end 22 of the chain body 2 when the chain wrench 100 is not working.

[0054] Figure 2 is a partial structural explosion diagram of the chain wrench provided by the embodiment of the present invention. As Figure 1 and Figure 2 shown, according to an optional embodiment of the present invention, the interior of the second part 12 has a cavity, and the cavity is used to accommodate the screwdriver 4.

[0055] In this embodiment, similarly, the setting of the screwdriver 4 can also increase the usage scenarios of the chain wrench 100. Usually, the screwdriver 4 is stored in the cavity, and when encountering a suitable working condition, the screwdriver 4 can be taken out of the cavity to tighten or loosen the screw.

[0056] Refer to Figure 2 , according to an optional embodiment of the present invention, one end of the second part 12 far away from the first part 11 is provided with an opening communicating with the cavity, the inner wall of the cavity near the opening is provided with internal threads, and the outer wall of the handle 41 of the screwdriver 4 is provided with external threads 411 matching the internal threads.

[0057] In this embodiment, this setting method can increase the lever arm of the chain wrench 100 during use according to actual needs, thereby increasing the torque of screwing, and achieving the effect of saving effort.

[0058] Specifically, when encountering a screwed part that is difficult to loosen or tighten, the handle 41 of the screwdriver 4 can be threadedly connected with the internal threads in the cavity, so that the handle 41 of the screwdriver 4 leaks out of the opening of the rod body of the second part 12. The operator can hold the handle 41 of the screwdriver 4 to screw. Compared with the method of holding the rod body of the second part 12, the lever arm is increased, thereby increasing the torque of screwing, and further achieving the effect of saving effort.

[0059] It is easy to understand that the size of the handle 41 of the screwdriver 4 leaking out of the opening can be determined according to actual needs, and there is no specific limitation.

[0060] As mentioned above, only the preferred specific embodiments of the present invention are described, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A chain wrench, characterized in that: include: a rod body having a fixing portion; and A chain body, the chain body comprising a chain body and a fixed end and a free end respectively located on both sides of the chain body, the fixed end being detachably slidably connected to the rod body, the fixed end being able to move along the extension direction of the rod body, and the fixed portion being used to connect to the chain body; in the chain body, a screwing portion for screwing a screwed part is formed between the connection between the chain body and the fixed portion and the fixed end.

2. The chain wrench according to claim 1, characterized in that: The chain wrench also includes a fastening assembly, the rod body includes a first part and a second part, the first part and the second part are connected end to end and both extend along a first direction, the first part is provided with a slide groove extending along the first direction, and the fixed end is fixed to the slide groove through the fastening assembly.

3. The chain wrench according to claim 2, characterized in that: The fixing portion is a hook, and the hook is used for clamping with the chain body.

4. The chain wrench according to claim 3, characterized in that: The hook is arranged on a side of the first portion facing away from the second portion.

5. The chain wrench according to claim 1, characterized in that: The width of the chain body is 5mm-10mm.

6. The chain wrench according to claim 1, characterized in that: The chain body comprises at least two superimposed sub-chains.

7. The chain wrench according to claim 2, characterized in that: The first portion is provided with a scale, and the scale extends along the first direction.

8. The chain wrench according to claim 2, characterized in that: The second part is provided with a buckle, and the buckle is used to connect with the free end of the chain body.

9. The chain wrench according to any one of claims 2-4, 7 and 8, characterized in that: The second part has a cavity inside, and the cavity is used to accommodate a screwdriver.

10. The chain wrench according to claim 9, characterized in that: An end of the second part away from the first part is provided with an opening communicating with the cavity, an inner wall of the cavity near the opening is provided with an internal thread, and an outer wall of the screwdriver handle is provided with an external thread matching the internal thread.

Images