Combination wrench suitable for narrow space

Abstract

The utility model relates to a combination wrench suitable for a narrow space, which comprises a wrench head, a wrench head main body part and a wrench head matching part which are in detachable mortise and tenon connection, an opening-shaped plum blossom connector formed by a first bending line is arranged in the wrench head main body part, and the wrench head main body part is connected with the wrench head matching part; a second bending line which is matched with the first bending line and seals the opening-shaped plum blossom connector is arranged in the wrench head matching part; and the wrench handle is connected with one end, far away from the plum blossom connector, of the wrench head main body part. Compared with the prior art, the tool has the advantages of improving the fixing and assembling effect, completing torque fastening, improving the working efficiency and the like.

Description

Technical Field

[0001] The utility model relates to a wrench, in particular to a combination wrench suitable for a narrow space. Background Art

[0002] Nuclear power plants require the removal and installation of various common flange connection bolts. Because these bolts are located in cramped conditions, a multipurpose wrench is required to quickly and accurately remove and reinstall them in compliance with maintenance regulations. Using this device reduces the risk of equipment damage and lowers worker radiation exposure. The device has a wide range of applications, enabling removal and installation work tailored to any power plant environment, flange size, and spatial location.

[0003] Patent announcement number CN201856191U discloses a small-angle plum blossom open-end wrench, comprising a handle, one end of which is connected to the wrench head via a connector. The wrench head is provided with a plum blossom interface formed by a bending line, and an opening is provided on the wrench head that extends through the plum blossom interface, forming an open structure of the plum blossom interface. A pipe can be passed through the opening to tighten and loosen the outer nuts of two adjacent pipes in a narrow space; this improves assembly methods and efficiency, and ensures the reliability and safety of the assembly process. However, this open-end wrench is not compatible with other drive components and has a low compatibility rate with existing drive components. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a combination wrench suitable for narrow spaces, improve the fixing and assembly function, complete torque tightening, and greatly improve work efficiency.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A combination wrench suitable for use in a narrow space, comprising:

[0007] The wrench head comprises a wrench head main body and a wrench head mating portion connected by a detachable mortise and tenon connection, wherein the wrench head main body is provided with an open plum blossom interface formed by a first bending line, and the wrench head mating portion is provided with a second bending line that cooperates with the first bending line and closes the open plum blossom interface;

[0008] And a wrench handle connected to the end of the wrench head main body away from the plum blossom interface.

[0009] Furthermore, raised connecting parts are provided on both sides of the open plum blossom interface;

[0010] Groove connecting parts connected to the convex connecting parts with mortise and tenon joints are provided on both sides of the second bending line.

[0011] Furthermore, after the wrench head main body and the wrench head matching part are connected by mortise and tenon, the first bending line and the second bending line form a complete closed plum blossom interface.

[0012] Furthermore, the central angle of the circumscribed circle of the closed plum blossom interface corresponding to the first bending line is 240°~300°, and the central angle of the circumscribed circle of the closed plum blossom interface corresponding to the second bending line is 60°~120°, and the sum of the two is 360°.

[0013] Furthermore, the central angle of the circumscribed circle of the closed plum blossom interface corresponding to each first bending line is 7.5° to 15°;

[0014] The central angle of the circumscribed circle of the closed plum blossom interface corresponding to each second bending line is 7.5°~15°, and its central angle is consistent with the central angle of the circumscribed circle of the closed plum blossom interface corresponding to each first bending line.

[0015] Furthermore, the open plum blossom interface is composed of 15 to 25 first bending lines;

[0016] The number of the second bending lines is 4 to 10.

[0017] Furthermore, the wrench handle includes a first connecting plate connected to the wrench head body.

[0018] Furthermore, a first through hole is provided on the first connecting plate.

[0019] Furthermore, the wrench handle comprises:

[0020] A first connecting plate and a second connecting plate are parallel to each other in an arc shape, wherein the first connecting plate is provided with a first through hole, and the second connecting plate is provided with a second through hole, and the first through hole and the second through hole correspond to each other;

[0021] a card slot located between the first connecting plate and the second connecting plate;

[0022] and a bottom plate arranged at the bottom of the first connecting plate and the second connecting plate and connected thereto.

[0023] Furthermore, the first through hole and the second through hole include circular, rectangular, T-shaped, and a combination of circular and rectangular shapes, and their shapes can be adjusted according to applicable occasions.

[0024] Furthermore, the base plate of the wrench head and the wrench handle are connected via an arc-shaped connecting block.

[0025] Furthermore, the thickness of the arc-shaped connecting block is greater than the thickness of the wrench head.

[0026] Compared with the prior art, the utility model has the following advantages:

[0027] (1) The utility model provides a wrench head with a raised connection portion on both sides of the opening of the main body, which can effectively connect the groove connection portion of the wrench head mating portion and the hydraulic tool in the device, and then smoothly tighten; the wrench head mating portion is provided with a groove connection portion connected to the raised connection portion by mortise and tenon on both sides of the second bending line, which plays a role in structural reinforcement and fixed assembly in the tool, making it closed. By connecting the raised connection portion of the main body of the wrench head with the groove connection portion of the wrench head mating portion, placing it on the nut to be tightened and assembling the combination wrench according to relevant requirements, it is possible to complete torque tightening of adjacent pipe outer shell nuts in a narrow space, overcoming the position where conventional wrenches cannot reach the purpose, and can meet the tightening requirements under complex conditions, greatly improving work efficiency.

[0028] (2) The combination wrench of the utility model has a simple and compact structure, which can minimize the space occupied by the combination wrench without affecting its performance. It is easy to carry and store, easy to clean, and can be reused. Its detachable structure also facilitates replacement and maintenance.

[0029] (3) The combination wrench of the present invention provides maximum operating space due to its small size during use. When the hand operates the combination wrench, the first connecting plate and the second connecting plate can be held, which reduces the obstruction of vision while ensuring that the operating requirements are met. It can effectively prevent burns to personnel and leakage of media, and reduce the risk of equipment damage and personnel radiation exposure.

[0030] (4) The combination wrench of the utility model can be used in conjunction with other hydraulic tools. The hydraulic tool is connected to the first through hole of the first connecting plate and the first through hole of the second connecting plate of the combination wrench. The design concept is to break away from the ordinary wrench, which is to use the hand to pull and the hammer to apply force to the wrench. The shape of the first connecting plate and the second connecting plate is designed to be compatible with other types of tools, so that it can be used in conjunction with other special types of hydraulic tools, and can be used alone to loosen nuts with other auxiliary tools in situations where space is difficult to use.

[0031] (5) The combination wrench of the utility model is highly flexible and can achieve a wide range of angle adjustments by operating at a single small angle. It perfectly adapts to multi-directional and multi-position work requirements and demonstrates extremely high operational freedom and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural diagram of the combination wrench shown in Example 1;

[0033] Figure 2 This is a schematic diagram of the use of the combination wrench shown in Example 1;

[0034] Figure 3 This is a schematic diagram of the combination wrench shown in Example 1 and the hollow hydraulic wrench in use;

[0035] Figure 4 This is a schematic structural diagram of the combination wrench shown in Example 2;

[0036] Figure 5 This is a three-dimensional schematic diagram of the combination wrench shown in Example 2 used in conjunction with a torque wrench;

[0037] Figure 6 This is a plan view of the combination wrench shown in Example 2 used in conjunction with a torque wrench.

[0038] Description of the marks in the figure:

[0039] 1-wrench head, 11-wrench head body, 111-first fold line, 112-protruding connecting portion, 12-wrench head matching portion, 121-second fold line, 122-groove connecting portion;

[0040] 2-wrench handle, 21-first connecting plate, 211-first through hole, 22-second connecting plate, 221-second through hole, 23-slot, 24-bottom plate;

[0041] 3-arc connecting block;

[0042] 4-Hollow hydraulic wrench, 41-Housing, 42-Arm slot, 43-Hydraulic pull rod;

[0043] 5-Torque type torque wrench, 51-handle, 52-acting head, 521-connecting head. DETAILED DESCRIPTION

[0044] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments. In the following embodiments or examples, unless otherwise specified, functional components or structures are conventional components or structures used in the art to achieve the corresponding functions.

[0045] It should be noted that in the description of this utility model, the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0047] Example 1

[0048] A combination wrench suitable for use in small spaces, such as Figure 1 and 2 Shown, including:

[0049] The wrench head 1 includes a wrench head main body 11 and a wrench head mating portion 12 with a detachable mortise and tenon connection. The wrench head main body 11 is provided with an open plum blossom interface formed by a first bending line 111, and the wrench head mating portion 12 is provided with a second bending line 121 that cooperates with the first bending line 111 and closes the open plum blossom interface.

[0050] And a wrench handle 2 connected to the end of the wrench head main body 11 away from the plum blossom interface 13.

[0051] In this embodiment, protruding connecting parts 112 are provided on both sides of the open plum blossom interface; and groove connecting parts 122 connected to the protruding connecting parts 112 by mortise and tenon are provided on both sides of the second bending line 121.

[0052] In this embodiment, after the wrench head main body 11 and the wrench head matching portion 12 are connected by mortise and tenon, the first bending line 111 and the second bending line 121 form a complete closed plum blossom interface.

[0053] In this embodiment, the central angle of the circumscribed circle of the closed plum blossom interface corresponding to the first bending line 111 is 285°, and the central angle of the circumscribed circle of the closed plum blossom interface corresponding to the second bending line 121 is 75°, and the sum of the two is 360°.

[0054] In this embodiment, the central angle of the circumscribed circle of the closed plum blossom interface corresponding to each first bending line 111 is 15°; the central angle of the circumscribed circle of the closed plum blossom interface corresponding to each second bending line 121 is 15°, and its central angle is consistent with the central angle of the circumscribed circle of the closed plum blossom interface corresponding to each first bending line 111. The open plum blossom interface is composed of 18 first bending lines 111; the second bending lines 121 have 6.

[0055] In this embodiment, the cross-section of the wrench handle 2 is U-shaped. The wrench handle 2 includes: a first connecting plate 21 and a second connecting plate 22 that are parallel to each other in an arc shape; a slot 23 located between the first connecting plate 21 and the second connecting plate 22; and a bottom plate 24 that is arranged at the bottom of the first connecting plate 21 and the second connecting plate 22 and is connected thereto. The first connecting plate 21 is provided with a first through hole 211, and the second connecting plate 22 is provided with a second through hole 221, and the first through hole 211 and the second through hole 221 correspond to each other. The bottom plate 24 of the wrench head 1 is connected to the wrench handle 2 by an arc-shaped connecting block 3. The thickness of the arc-shaped connecting block 3 is greater than the thickness of the wrench head 1. The first through hole 211 and the second through hole 221 are a combination of a circular and a rectangular connection, and the circle is connected to the short side of the rectangle.

[0056] The working process and working principle of the combination wrench are as follows:

[0057] like Figure 2As shown, when in use, the wrench head main body 11 is passed through the narrow space of the open plum blossom interface and put on the appropriate position of the nut. The wrench head matching part 12 is connected to the raised connection part 112 of the wrench head main body 11 through the groove connection part 122. First, the combination wrench is rotated by hand by rotating the wrench handle 2 to rotate the combination wrench, thereby rotating the nut. After each rotation of a certain angle, the combination wrench is changed in position and the above action is repeated until the nut is pre-tightened. Then, the hydraulic tool, which is a hollow hydraulic wrench 4 in this embodiment, is combined with the combination wrench. The hollow hydraulic wrench 4 includes a housing 41, a placement groove located inside the housing 41 and connected to the outside world, an arc-shaped card groove 42 located outside the placement groove, and a hydraulic pull rod 43 with a driving function. The hollow hydraulic wrench 4 is a prior art, and those skilled in the art are familiar with its structure and principle. This embodiment only describes the parts related to the combination wrench, and the oil cylinder, rotary joint, etc. of the hollow hydraulic wrench 4 are not repeated. When in use, the first connecting plate 21 and the second connecting plate 22 of the wrench handle 2 are inserted into the placement groove of the hollow hydraulic wrench 4. After insertion, the hydraulic pull rod 43 is connected with the first through hole 211 of the first connecting plate 21 and the second through hole 221 of the second connecting plate 22. The arc-shaped connecting block 3 is rotated along the arc-shaped slot 41 by the hydraulic pull rod 43. The combination wrench is rotated with hydraulic pressure until the nut is tightened. The schematic diagram is shown as follows. Figure 3 shown.

[0058] Example 2

[0059] A combination wrench suitable for use in small spaces, such as Figure 4 Shown, including:

[0060] The wrench head 1 includes a wrench head main body 11 and a wrench head mating portion 12 with a detachable mortise and tenon connection. The wrench head main body 11 is provided with an open plum blossom interface formed by a first bending line 111, and the wrench head mating portion 12 is provided with a second bending line 121 that cooperates with the first bending line 111 and closes the open plum blossom interface.

[0061] And a wrench handle 2 connected to the end of the wrench head main body 11 away from the plum blossom interface 13.

[0062] In this embodiment, protruding connecting parts 112 are provided on both sides of the open plum blossom interface; and groove connecting parts 122 connected to the protruding connecting parts 112 by mortise and tenon are provided on both sides of the second bending line 121.

[0063] In this embodiment, after the wrench head main body 11 and the wrench head matching portion 12 are connected by mortise and tenon, the first bending line 111 and the second bending line 121 form a complete closed plum blossom interface.

[0064] In this embodiment, the central angle of the circumscribed circle of the closed plum blossom interface corresponding to the first bending line 111 is 285°, and the central angle of the circumscribed circle of the closed plum blossom interface corresponding to the second bending line 121 is 75°, and the sum of the two is 360°.

[0065] In this embodiment, the central angle of the circumscribed circle of the closed plum blossom interface corresponding to each first bending line 111 is 15°; the central angle of the circumscribed circle of the closed plum blossom interface corresponding to each second bending line 121 is 15°, and its central angle is consistent with the central angle of the circumscribed circle of the closed plum blossom interface corresponding to each first bending line 111. The open plum blossom interface is composed of 18 first bending lines 111; the second bending lines 121 have 6.

[0066] In this embodiment, the wrench handle 2 includes a first connecting plate 21 connected to the wrench head main body 11. The first connecting plate 21 is provided with a first through hole 211. The first through hole 211 is square. Figure 4 shown.

[0067] In the case that hydraulic tools cannot be used, replace the ordinary torque wrench 5 to complete the torque tightening or disassembly required at a specific angle or working condition, such as Figure 5 and 6 As shown, the connecting head 521 of the torque wrench 5 located on one side of the working head 52 is inserted into the first through hole 211 and the handle 51 is used to rotate.

[0068] The above description of the embodiments is intended to facilitate understanding and use of the utility model by those skilled in the art. Those skilled in the art will readily be able to make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the utility model is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of this utility model without departing from the scope of this utility model should be within the scope of protection of this utility model.

Claims

1. A combination wrench suitable for use in a narrow space, characterized in that: include: A wrench head (1) comprises a wrench head main body (11) and a wrench head matching portion (12) connected by a detachable mortise and tenon connection, wherein the wrench head main body (11) is provided with an open plum blossom interface formed by a first bending line (111), and the wrench head matching portion (12) is provided with a second bending line (121) that cooperates with the first bending line (111) and closes the open plum blossom interface; and a wrench handle (2) connected to one end of the wrench head main body (11) away from the plum blossom interface (13); protruding connecting portions (112) are provided on both sides of the open plum blossom interface; Grooved connection parts (122) connected to the raised connection parts (112) by mortise and tenon are provided on both sides of the second bending line (121); After the wrench head main body (11) and the wrench head matching portion (12) are connected by mortise and tenon, the first bending line (111) and the second bending line (121) form a complete closed plum blossom interface; The central angle of the circumscribed circle of the closed plum blossom interface corresponding to the first bending line (111) is 240°~300°, and the central angle of the circumscribed circle of the closed plum blossom interface corresponding to the second bending line (121) is 60°~120°, and the sum of the two is 360°.

2. A combination wrench suitable for use in a narrow space according to claim 1, characterized in that: The central angle of the circumscribed circle of the closed plum blossom interface corresponding to each first bending line (111) is 7.5° to 15°; The central angle of the circumscribed circle of the closed plum blossom interface corresponding to each second bending line (121) is 7.5°~15°, and the central angle thereof is consistent with the central angle of the circumscribed circle of the closed plum blossom interface corresponding to each first bending line (111).

3. The combination wrench suitable for use in a narrow space according to claim 1, characterized in that: The open plum blossom interface is composed of 15 to 25 first bending lines (111); The second bending lines (121) have 4 to 10 numbers.

4. The combination wrench suitable for use in a narrow space according to claim 1, characterized in that: The wrench handle (2) comprises a first connecting plate (21) connected to the wrench head main body (11).

5. The combination wrench suitable for use in a narrow space according to claim 4, characterized in that: A first through hole (211) is provided on the first connecting plate (21).

6. The combination wrench suitable for use in a narrow space according to claim 5, characterized in that: The wrench handle (2) comprises: A first connecting plate (21) and a second connecting plate (22) are parallel to each other in an arc shape, the first connecting plate (21) is provided with a first through hole (211), the second connecting plate (22) is provided with a second through hole (221), and the first through hole (211) and the second through hole (221) correspond to each other; a slot (23) located between the first connecting plate (21) and the second connecting plate (22); and a bottom plate (24) arranged at the bottom of the first connecting plate (21) and the second connecting plate (22) and connected thereto.

7. The combination wrench suitable for use in a narrow space according to claim 6, characterized in that: The base plate (24) of the wrench head (1) and the wrench handle (2) are connected via an arc-shaped connecting block (3).

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