CN209831476U - Multifunctional chain wrench - Google Patents

Abstract

The utility model discloses a multifunctional chain wrench, which comprises a handle, wherein one end of the handle is provided with a first connecting hole and a second connecting hole; the locking piece is hinged with the first connecting hole and comprises a limiting groove and a clamping groove; the chain is hinged with the second connecting hole, the limiting groove can just place a hinged column head of the chain, and the diameter of the limiting groove is not smaller than that of the hinged column head; the cross section of the clamping groove is triangular, and when the chain wrench is used for clamping an object, the clamping groove forms three-point stress clamping. The utility model discloses reduce the chain and by the clearance between the holder, reduce the probability that is taken off by the holder pine, improve the durability of spanner, improved work efficiency simultaneously.

Description

Multifunctional chain wrench

Technical Field

The utility model relates to a technical field of spanner instrument, especially a multi-functional chain spanner.

Background

In the current market, the wrenches of hand tools are of many types, but they are divided into two types by their working objects, one type is used for wrenching nuts (posts) and the other type is used for wrenching pipes, these two types of wrenches are not generally universal, and they are often limited by their calibers in their respective operation processes, especially when the nuts are used as the working objects, they are usually equipped with wrenches of different calibers to be suitable for nuts of various sizes, in order to increase the application range of the wrenches, adjustable wrenches and chain wrenches capable of adjusting the calibers appear in the market, but the disadvantage is that the calibers of the adjustable wrenches are limited and suitable for wrenching nuts (posts).

In the circumstances such as the maintenance of pipeline, generally all need adopt the breakout tongs, instrument such as chain tongs are dismantled, and simultaneously, the condition of using chain spanner is also more and more, and current chain spanner comprises handle, latch head, chain etc. and its latch head easily slips the pine with the chain and takes off in the practical application, and it is inconvenient to use, and the durability is poor, and work efficiency is low. And the manufacturing cost is higher, and the method is not economical and applicable.

For example, in patent No. CN87216292, there is provided a chain wrench, which comprises a handle and a chain, wherein the chain is composed of a roller, a connecting piece and a connecting pin, the head of the handle is provided with two corresponding parallel connecting plates, two arc-shaped plate teeth are arranged between the two connecting plates at the head of the handle, the top ends of the two connecting plates are provided with connecting holes, one end of the chain is fixed between the two connecting plates by a shaft 4 of the connecting hole, and a chain mouth through which the chain can pass is formed between the shaft and the two connecting plates. However, in use, there is still a gap between the chain and the object to be clamped, making it difficult to form a tight fit to clamp the component.

SUMMERY OF THE UTILITY MODEL

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the above and/or other problems occurring in the prior art.

Therefore, one of the objects of the present invention is to provide a multi-function chain wrench.

In order to solve the technical problem, the utility model provides a following technical scheme: a multifunctional chain wrench comprises a handle, a first connecting hole and a second connecting hole are formed in one end of the handle; the locking piece is hinged with the first connecting hole and comprises a limiting groove and a clamping groove; the chain is hinged with the second connecting hole, the limiting groove can just place a hinged column head of the chain, and the diameter of the limiting groove is not smaller than that of the hinged column head; the cross section of the clamping groove is triangular, and when the chain wrench is used for clamping an object, the clamping groove forms three-point stress clamping.

As an optimized scheme of the multi-functional chain spanner, wherein: the included angle of the supporting angle of the clamping groove is 120 degrees.

As an optimized scheme of the multi-functional chain spanner, wherein: and anti-skidding teeth are arranged on the outer contour of the clamping groove.

As an optimized scheme of the multi-functional chain spanner, wherein: the anti-slip teeth are in a regular triangle shape.

As an optimized scheme of the multi-functional chain spanner, wherein: the locking piece is composed of two limiting plates, the two limiting plates are fixedly connected, and the distance between the two limiting plates is not less than the width of the handle; wherein, the handle inserts in the interval between two limiting plates of retaining member, and with the retaining member articulates mutually.

As an optimized scheme of the multi-functional chain spanner, wherein: the length range of the handle is 300 mm-800 mm, and the length range of the chain is 350 mm-1200 mm.

As an optimized scheme of the multi-functional chain spanner, wherein: the locking piece is 50 mm-80 mm long and 20mm wide.

The utility model has the advantages that: reduce the chain and by the clearance between the holder, reduce the probability that is taken off by the holder, improve the durability of spanner, improved work efficiency simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor. Wherein:

FIG. 1 is a schematic view of a perspective of the overall structure of one embodiment of the multi-function chain wrench of the present invention;

FIG. 2 is a schematic view of another perspective of the overall structure of one embodiment of the multi-function chain wrench of the present invention;

fig. 3 is a schematic view of another perspective of the overall structure of an embodiment of the multi-function chain wrench according to the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying the present invention are described in detail below with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the current market, the wrenches of hand tools are generally equipped with wrenches with different calibers to be suitable for nuts with various sizes, in order to enlarge the application range of the wrenches, the adjustable wrenches and the chain wrenches with adjustable calibers appear in the market, but the shortcomings are that the calibers of the adjustable wrenches are limited, and in use, a gap still exists between a chain and an object to be clamped, so that the condition that the tight fit is difficult to form and the parts are clamped is caused.

In view of this, the utility model provides a multi-functional chain spanner utilizes the unlimited locking work piece of lever principle, solves among the prior art problem that has the clearance between spanner and the centre gripping object, and its main part includes handle 100, retaining member 200 and chain 300, and retaining member 200 and chain 300 are equallyd divide and are do not articulated mutually with handle 100, through mutually supporting of three, realize the purpose of unlimited locking (finally lock completely).

Specifically, referring to fig. 1 to 3, the handle 100 is provided with a first coupling hole 101 and a second coupling hole 102 at one end thereof.

The locking member 200 is hinged to the first connecting hole 101 and comprises a limiting groove 201 and a clamping groove 202, and the limiting groove 201 is formed by inwards recessing the end face of the locking member 200.

The chain 300 is hinged with the second connecting hole 102, the limiting groove 201 can just place the hinged column head of the chain 300, so the end surface of the locking piece 200 is inwards sunken to form the limiting groove 201, the depth of the 'sunken' is not less than two thirds of the diameter of the hinged column head, and meanwhile, the diameter of the limiting groove 201 is not less than the diameter of the hinged column head, so that the hinged column head of the chain 300 can be clamped in the limiting groove 201 and cannot fall off.

Preferably, the cross section of the clamping groove 202 is triangular, and when the chain wrench is used for clamping an object, the clamping groove 202 forms a three-point forced clamping.

Further, in order to enable better applicability to various products and ensure that three-point stress realizes infinite locking through the lever principle, the included angle of the supporting angle of the clamping groove 202 is 120 °.

Further, the outer contour of the clamping groove 202 is provided with anti-slip teeth 202 a.

Preferably, the anti-slip teeth 202a are regular triangles.

The utility model provides a second embodiment of multi-functional chain spanner, this embodiment is different from first embodiment be: in this embodiment, the locking member 200 is composed of two limiting plates 203, and the two limiting plates 203 are fixedly connected (in this embodiment, the two limiting plates 203 are fixed by bolts and nuts, and the distance between the two limiting plates 203 is not less than the width of the handle 100, so as to ensure that the locking member 200 can move relative to the handle 100.

The assembly between handle 100 and retaining member 200 is as follows: the handle 100 is inserted into the space between the two limiting plates 203 of the locker 200 and is hinged to the locker 200 by a pin.

In one embodiment of the present invention, an assembly drawing is used as an example, but the scope of protection is not limited to the dimensions illustrated, and the illustrated example is used for illustrative purposes only.

The length range of the handle 100 is 300 mm-800 mm, the diameter is 20 mm-40 mm, the length range of the chain 300 is 350 mm-1200 mm, the locking member 200 body is composed of two limiting plates 203 with the length of 50 mm-80 mm and the width of 20mm, and the side length of the regular triangle of the anti-skid teeth 202a is 2 mm.

In the embodiment, pins with diameters of 3mm to 5mm are used at the first connecting holes 101 and the locker 200, and pins with diameters of 7mm to 10mm are used at the second connecting holes 102 and the chains 300.

It should be noted that the chain wrench with the above size can be suitable for the operation of workpieces with the diameter of 50 mm-350 mm.

It should be noted that, in the assembling, the position where the first coupling hole 101 and the locker 200 are hinged is different from the position where the second coupling hole 102 and the chain 300 are hinged. For example, referring to the drawings, the first coupling hole 101 and the locker 200 are hinged to the right, and the second coupling hole 102 and the chain 300 are hinged to the left.

When the chain wrench is used, the chain 300 is roughly circled into a circle which is almost as large as the diameter of an object to be clamped, the hinged column head of the last chain 300 which forms the circle is placed in the limiting groove 201 and is infinitely locked by pulling the rotating handle 100, and finally two points formed by the two sides of the limiting groove 201 and the clamped piece in contact form a three-point stress together with the 120-degree included angle of the limiting groove 201, so that the gap between the clamped piece and the chain wrench is reduced, and the problems that the chain wrench is easy to slip and loosen with the chain 300 in practical application, is inconvenient to use, poor in durability and low in working efficiency are solved.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention.

It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims (7)

1. A multi-functional chain spanner which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

a handle (100) having a first connection hole (101) and a second connection hole (102) at one end thereof;

the locking piece (200) is hinged with the first connecting hole (101) and comprises a limiting groove (201) and a clamping groove (202); and the number of the first and second groups,

the chain (300) is hinged with the second connecting hole (102), the limiting groove (201) can just place a hinged column head of the chain (300), and the diameter of the limiting groove (201) is not smaller than that of the hinged column head;

the cross section of the clamping groove (202) is triangular, and when the chain wrench is used for clamping an object, the clamping groove (202) can be clamped under three-point stress.

2. The multi-function chain wrench as claimed in claim 1, wherein: the support angle of the clamping groove (202) is 120 degrees.

3. The multi-function chain wrench as claimed in claim 1, wherein: and anti-slip teeth (202a) are arranged on the outer contour of the clamping groove (202).

4. A multi-function chain wrench as claimed in claim 3, wherein: the anti-skid teeth (202a) are in a regular triangle shape.

5. The multi-function chain wrench as claimed in claim 1, wherein: the locking piece (200) is composed of two limiting plates (203), the two limiting plates (203) are fixedly connected, and the distance between the two limiting plates (203) is not less than the width of the handle (100);

wherein the handle (100) is inserted into the space between the two limiting plates (203) of the locker (200) and is hinged with the locker (200).

6. The multi-function chain wrench as claimed in claim 1, wherein: the length range of the handle (100) is 300-800 mm, and the length range of the chain (300) is 350-1200 mm.

7. The multi-function chain wrench as claimed in claim 5, wherein: the limiting plate (203) is 50-80 mm long and 20mm wide.