Wrench for narrow space

Abstract

The utility model discloses a wrench for a narrow space, which belongs to the technical field of wrenches and structurally comprises a wrench handle and a ratchet wheel, and an open end and a ratchet wheel hole are respectively arranged at two ends of the wrench handle. The ratchet wheel is rotationally installed in the ratchet wheel hole and installed in the ratchet wheel hole through a clamping spring, a pawl is connected into the ratchet wheel hole through a spring I and can abut against ratchets on the outer side of the ratchet wheel in a matched mode, a conversion head driving end is installed in the ratchet wheel in an inserted mode, and a conversion head working end is integrally formed at the end of the conversion head driving end. The other end of the working end of the conversion head can be embedded and inserted into a groove in the end part of a screw, so that an inner hexagonal screw in a narrow space is twisted, and the use performance of a wrench tool is improved; the wrench can be applied in a narrow space, and is low in manufacturing cost, stable in structure, easy to operate and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of wrenches, in particular to a wrench for narrow spaces. Background Art

[0002] A wrench is a commonly used installation and disassembly tool that utilizes the lever principle to turn fasteners such as bolts, screws, and nuts. Usually, one or both ends of the handle are provided with openings or socket holes for clamping bolts or nuts. When in use, an external force is applied to the handle along the thread rotation direction to turn the bolt or nut.

[0003] During the process of installing and disassembling equipment, problems such as the dense arrangement of the internal structure of the equipment or the narrow installation space of the equipment, which make it difficult to operate, will affect the normal disassembly operation of the screws.

[0004] There is a wrench for narrow spaces with the application number CN202221929337.7. In this patent document, a method using a plug-in structure is disclosed to replace the wrench heads of different sizes in order to turn nuts of different sizes. Specifically, when it is necessary to replace the first wrench head or the second wrench head, the user presses the pin block to retract the pin block and separate it from the positioning hole. Then, the user pulls the first wrench head or the second wrench head outwards, and pulls the first wrench head or the second wrench head out from both ends of the handle, so as to facilitate the user to select a suitable wrench head for quick replacement.

[0005] When using the technical solution in the above patent document, the wrench heads of different sizes only have differences in the size of the notches at their end positions, and can only turn external hexagonal nuts of different sizes, and cannot perform turning operations on internal hexagonal screws. The functional effects are limited. Therefore, this application provides a wrench for narrow spaces. Summary of the Utility Model

[0006] In order to solve the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a wrench for narrow spaces, which can realize the application of the wrench in narrow spaces, has a low manufacturing cost, a stable structure, is simple to operate, and has high practicability.

[0007] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0008] Provided is a wrench for narrow spaces, which includes pliers handles, a ratchet pawl, a ratchet wheel, a circlip, a conversion head, spring I, spring II and steel balls. One end of the pliers handle is provided with an open end, and the other end is provided with a ratchet hole. Spring I, the ratchet pawl, the ratchet wheel and the circlip are arranged in the ratchet hole. The conversion head is arranged inside the ratchet wheel. The driving end of the conversion head is a dodecagon. A counterbore is arranged at the position of the driving end of the conversion head. Spring II and the steel balls are arranged in the counterbore. The driving end of the conversion head can cooperate with the ratchet wheel. The working end of the conversion head is hexagonal in shape. A boss is arranged at the connecting part between the driving end and the working end of the conversion head, which can prevent the conversion head from slipping, so as to realize the cooperation among the pliers handle, the ratchet wheel and the conversion head.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0010] 1. The wrench for narrow spaces in the example of the present utility model is used to twist the hexagon socket head cap screws in narrow spaces, and has high performance.

[0011] 2. The wrench for narrow spaces in the example of the present utility model has a compact overall structure, small volume, low manufacturing cost and high economic benefits. Description of the Drawings

[0012] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objectives and advantages of the present application will become more obvious:

[0013] Figure 1 It is a schematic structural diagram of the overall wrench for narrow spaces provided by the embodiment of the present utility model;

[0014] Figure 2 It is a schematic structural diagram of a part of the wrench for narrow spaces provided by the embodiment of the present utility model Figure 1 ;

[0015] Figure 3 It is a schematic structural diagram of a part of the wrench for narrow spaces provided by the embodiment of the present utility model Figure 2 。

[0016] In the figure: 1 pliers handle, 2 spring I, 3 ratchet pawl, 4 ratchet wheel, 5 conversion head, 6 spring II, 7 steel balls, 8 circlip, 9 driving end of the conversion head, 10 counterbore, 11 boss, 12 working end of the conversion head, 13 open end, 14 ratchet hole. Detailed Embodiments

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0018] The components of the embodiments of the present utility model usually described and shown in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model.

[0019] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. In addition, it should be noted that for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings.

[0023] Embodiment 1:

[0024] As Figure 1 and Figure 3 shown, this embodiment provides a wrench for narrow spaces, including a pair of pliers handles 1 and a ratchet 4. Open ends and ratchet holes 14 are respectively arranged at both ends of the pair of pliers handles 1; the ratchet 4 is rotatably installed in the ratchet hole 14, the ratchet 4 is installed in the ratchet hole 14 through a circlip 8, a pawl 3 is connected in the ratchet hole 14 through a spring I 2, and the pawl 3 can be abutted and cooperated with the ratchet teeth on the outside of the ratchet 4.

[0025] As Figure 2As shown, a conversion head driving end 9 is inserted and installed inside the ratchet wheel 4. An end of the conversion head driving end 9 is integrally formed with a conversion head working end 12. The other end of the conversion head working end 12 can be engaged and inserted into a groove at the end of a screw to twist an internal hexagonal screw in a narrow space, improving the usability of the wrench tool.

[0026] According to different types of screws, the groove at the end is in the structure of internal hexagon, internal pentagon, internal quadrilateral, internal triangle, etc.

[0027] Among them, the cross-section of the conversion head driving end 9 is a polygon, which can be a dodecagon or a tetradecagon; the cross-section of the conversion head working end 12 is a polygon, which can be a triangle, a quadrilateral, a pentagon or a hexagon.

[0028] To limit the position of the conversion head driving end 9 inside the conversion head working end 12, as Figure 2 shown, a boss 11 is integrally formed on the outside of the conversion head driving end 9, so that one side of the boss 11 can abut against the end surface of the ratchet wheel 4, preventing the conversion head driving end 9 from directly passing through and slipping off from the through hole in the middle of the ratchet wheel 4.

[0029] Embodiment 2:

[0030] The features identical to those in Embodiment 1 will not be described in detail. The different solution in this embodiment from Embodiment 1 is as follows: as Figure 2 shown, in this embodiment, a counterbore 10 is provided inside the conversion head driving end 9, and a steel ball 7 is installed in the counterbore 10 through a spring II 6; by the elastic force of the spring II 6, the other end of the steel ball 7 abuts tightly against the inner side surface of the ratchet wheel 4 to limit the position of the conversion head driving end 9 inside the conversion head working end 12, and can prevent the conversion head working end 12 from loosening from the conversion head driving end 9, ensuring the stable use of the wrench.

[0031] The above description is only for the preferred embodiments of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but also should cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept of the utility model. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.

[0032] Except for the technical features described in the specification, the rest of the technical features are known technologies to those skilled in the art. To highlight the innovative features of the present utility model, the rest of the technical features will not be described in detail here.

Claims

1. A narrow space wrench, comprising a pliers handle (1), characterized in that: The two ends of the pliers handle (1) are respectively provided with an open end and a ratchet hole (14); a ratchet (4) is rotatably mounted in the ratchet hole (14); a ratchet pawl (3) is connected to the ratchet hole (14) via a spring I (2); the ratchet pawl (3) is capable of abutting and cooperating with ratchet teeth on the outside of the ratchet (4); A conversion head driving end (9) is inserted and installed in the ratchet (4), and a conversion head working end (12) is integrally formed at the end of the conversion head driving end (9), and the other end of the conversion head working end (12) can be inserted and engaged with a groove at the end of the screw.

2. The narrow space wrench according to claim 1, characterized in that: The ratchet (4) is mounted in the ratchet hole (14) via a retaining spring (8).

3. The narrow space wrench according to claim 1, characterized in that: A countersunk hole (10) is provided in the driving end (9) of the conversion head, a steel ball (7) is installed in the countersunk hole (10) via a spring II (6), and the other end of the steel ball (7) is pressed tightly against the inner side surface of the ratchet wheel (4).

4. The narrow space wrench according to claim 1, characterized in that: A boss (11) is integrally formed on the outer side of the conversion head driving end (9), and one side of the boss (11) abuts against the end surface of the ratchet wheel (4).

5. The narrow space wrench according to claim 1, characterized in that: The cross-section of the conversion head driving end (9) is polygonal.

6. The narrow space wrench according to claim 1, characterized in that: The cross-section of the conversion head working end (12) is polygonal.

7. The narrow space wrench according to claim 5, characterized in that: The cross section of the conversion head driving end (9) is a dodecagon or a tetradecagon.

8. The narrow space wrench according to claim 6, characterized in that: The cross section of the conversion head working end (12) is triangular, quadrilateral, pentagonal or hexagonal.

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