A set of wrenches suitable for narrow spaces

Abstract

The utility model discloses a wrench set suitable for narrow space, including head, handle and force bar, handle with head perpendicularly arranged and fixedly connected, force bar with handle detachably connected, and with head roughly parallel arrangement, head is equipped with the clamping groove for clamping the fastener of dismounting, the wrench set of the utility model is especially suitable for narrow space. Through the clamping groove of head and the fastener of dismounting clamping fixed, when needing larger moment, uses force bar and loads, and then can realize 360's movable range through handle rotating head, improves the dismounting efficiency. Can be in narrow space quick loosening or fastening the fastener of dismounting, reduces the space limit.

Description

Technical Field

[0001] This utility model relates to the field of disassembly and assembly tools, and in particular to a wrench set suitable for narrow spaces. Background Technology

[0002] The turbine speed sensor is fixed on a speed sensor bracket surrounding the turbine rotor. The gap between the bracket and the sensor mounting position is less than 30mm. Using a standard open-end wrench to tighten the sensor positioning bolts can easily cause interference from the bracket. Currently, many power plants do not have specialized wrenches for disassembling and assembling turbine speed sensors. When performing disassembly and assembly of the turbine speed sensor, workers use standard open-end wrenches or even manually to loosen or tighten the sensor positioning bolts. This method leads to the following problems: 1) The turbine speed sensor bracket is very close to the sensor, and ordinary open-end wrenches do not have enough room to move, making it difficult to find the right angle to apply force during disassembly and assembly.

[0003] 2) When installing or removing the speed sensor, its positioning bolts need to be rotated dozens of times. When using an ordinary open-end wrench, due to space limitations, only a very small angle can be turned at a time, which greatly reduces work efficiency; 3) Because ordinary open-end wrenches are inconvenient to use and have low work efficiency, workers sometimes use their bare hands to help unscrew or screw in positioning bolts, which poses a risk of injury from contact with sharp objects in the surrounding area. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a wrench assembly suitable for narrow spaces.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: construct a wrench set suitable for narrow spaces, including a head, a handle and a lever. The handle is perpendicular to the head and fixedly connected. The lever is detachably connected to the handle and is arranged approximately parallel to the head. The head is provided with a slot for locking fasteners for disassembly and assembly.

[0006] Furthermore, the handle has a connecting hole at one end near the head, and the force rod has a connecting part at one end, which is detachably connected to the connecting hole.

[0007] Furthermore, the connecting part and the connecting hole are detachably connected through a plug-in fit or a threaded fit.

[0008] Furthermore, the end of the handle away from the head is provided with at least one handle suspension part for connecting a portable accessory.

[0009] Furthermore, the handle suspension part is a through hole.

[0010] Furthermore, the end of the extension rod away from the head is provided with at least one extension rod suspension part for connecting a portable accessory.

[0011] Furthermore, the force-adding rod suspension part is a through hole.

[0012] Furthermore, the rotation radius of the head is less than 25mm.

[0013] Furthermore, the height of the handle is 90mm-100mm.

[0014] Furthermore, the handle is cylindrical, and / or the force-applying rod is cylindrical.

[0015] By implementing this utility model, the following beneficial effects can be achieved: This utility model relates to a wrench set suitable for confined spaces, particularly for such spaces. The wrench head engages with the fastener to be removed or installed via a slot. When greater torque is required, a lever is used to apply load, loosening or tightening the fastener. The head can then be rotated 360° via the handle, improving efficiency. This allows for quick loosening or tightening of fasteners in confined spaces, reducing space constraints. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a wrench assembly suitable for narrow spaces according to an embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the head and handle structure; Figure 3 yes Figure 1 A schematic diagram of the force-adding rod in the diagram; Figure 4 yes Figure 1 The diagram illustrates how to use a wrench set suitable for confined spaces. Figure 1 ; Figure 5 yes Figure 1 The diagram illustrates how to use a wrench set suitable for confined spaces. Figure 2 . Detailed Implementation

[0017] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., 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, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a chemical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] See Figures 1 to 5 One embodiment of this utility model discloses a wrench assembly suitable for confined spaces, particularly suitable for the disassembly and assembly of turbine speed sensors in nuclear power plants. Figure 1 As shown, this wrench assembly for use in confined spaces includes a head 1, a handle 2, and a lever 3. The handle 2 is perpendicular to the head 1 and is fixedly connected by welding. The lever 3 is detachably connected to the handle 2 by threads, and its extension direction after installation is approximately parallel to the axis of the head 1. The head 1 is provided with a slot 11 for engaging and disengaging fasteners. The fasteners can be nuts, screws, etc.

[0022] The core of this invention lies in its unique structural design, which uses a handle vertically fixed to the head and a force-applying rod that is roughly parallel to the head and detachably connected to the handle. This design enables two working modes: the first is in a normal space, where the force-applying rod 3 can be directly gripped for flexible operation. Figure 4 and Figure 5As shown, the second method is used in confined spaces, such as deep holes or areas with dense equipment. The lever 3 can be mounted on the handle 2, and greater torque can be obtained by operating the lever 3, enabling short-duration or short-distance operation. When the fastener loosens, the lever 3 and handle 2 can be separated, allowing the handle 2 to easily rotate the fastener, enabling 360° operation and continuous multi-turn rotation. "Approximately parallel" can include absolute parallelism, as well as minor angular deviations due to manufacturing tolerances or functional requirements, such as within ±10°, as long as these deviations do not affect the basic function of the lever 3 in transmitting torque within confined spaces. The slot 11 can be any shape suitable for engaging fasteners, such as an internal hexagon, Torx, or open slot.

[0023] Furthermore, such as Figure 2 As shown, in some embodiments, the rotation radius of the head 1 is less than 25mm, such as 22mm, 23mm, 24mm, etc.

[0024] In this embodiment, the lateral clearance between the nut fixing the speed sensor and the sensor bracket is equal to or slightly greater than 30mm, and the rotation radius is less than 25mm. This design provides suitable space for the installation and removal of the speed sensor in a nuclear power plant turbine, ensuring that the head 1 can rotate within an extremely limited space. The head 1 is disc-shaped, with its diameter minimized as much as possible while maintaining basic strength and accommodating the handle 2, thus avoiding interference with the sensor bracket and making the installation and removal process faster and more efficient.

[0025] Furthermore, such as Figure 2 As shown, in some embodiments, the handle 2 has a connection hole 21 at one end near the head 1. The force rod 3 has a connecting part 31 at one end, which can be inserted into and fixed in the connecting hole 21 to achieve a detachable connection.

[0026] The connection between the connecting hole 21 and the connecting part 31 provides a simple, reliable, and cost-effective detachable connection solution. This split design not only facilitates carrying and storage but also allows for the replacement of extension rods 3 of different lengths or specifications as needed to adapt to different working conditions and torque requirements. Most importantly, in confined spaces, such as areas with dense equipment, each extension rod can be inserted separately into the work area, avoiding interference with other equipment.

[0027] Furthermore, in some embodiments, the end of the handle 2 furthest from the head 1 is also provided with a handle suspension part 22 for attaching a portable accessory. The portable accessory can be a key ring or a safety rope, etc. During work in a nuclear power plant, the portable accessory can be attached to the wrist or work bag to prevent it from falling off, thus meeting the regulations for foreign object control in the nuclear power maintenance field.

[0028] The core function of the handle suspension part 22 is to improve the portability and manageability of the tool, effectively preventing its loss. This structure allows the entire tool or the handle 2 and head 1 to be suspended as a single unit on a tool wall, tool bag, or safety belt. The handle suspension part 22 can be implemented in various forms, such as through holes, blind holes, U-shaped grooves, or annular grooves, all of which can achieve the suspension function.

[0029] Furthermore, in some embodiments, the handle suspension part 22 is a through hole extending through both sides of the handle 2. Using a through hole as the handle suspension part 22 offers high versatility, allowing ropes and hooks of various specifications to pass through directly, enabling quick connection and retrieval.

[0030] Furthermore, in some embodiments, the height of the handle 2 is 90mm-100mm, such as 95mm, 96mm, 99mm, etc.

[0031] The handle 2 has a height of 90mm-100mm, which is suitable for the operating space of the turbine speed sensor in a nuclear power plant. It provides sufficient lever arm for manual force application while ensuring that the overall size of the tool is compact and does not affect operation in confined environments.

[0032] Furthermore, such as Figure 2 and Figure 3 As shown, in some embodiments, the connection part 31 and the connection hole 21 are engaged by a plug-in connection or a threaded connection.

[0033] Specifically, in one implementation, the connecting part 31 is a boss, which is fixed to the connecting hole 21 by an interference fit or a clearance fit. In another implementation, the connecting part 31 is a cylinder with external threads, and the connecting hole 21 is a threaded hole with internal threads; the connecting part 31 and the connecting hole 21 are connected by threads. Boss insertion is a quick and simple connection method, with the advantage of convenient assembly without rotation, suitable for scenarios requiring rapid switching. Threaded connections offer the advantages of a strong and reliable connection, capable of transmitting greater torque and preventing loosening during heavy operation. These two methods are classic and fundamental structures for achieving detachable connections in the mechanical field, easy to manufacture, and inexpensive.

[0034] Furthermore, in some embodiments, the end of the extension rod 3 furthest from the head 1 is also provided with an extension rod suspension part 32 for connecting a portable accessory. The portable accessory can be a key ring or a safety rope, etc. During work in a nuclear power plant, the portable accessory can be attached to the wrist or work bag to prevent it from falling off, thus meeting the regulations for foreign object control in the nuclear power maintenance field.

[0035] The extension rod 3 features a separate suspension part 32, solving the problem of small parts being easily scattered and difficult to manage. This achieves modular storage of the tool; even when separated from the handle, the extension rod has its own fixed storage location. The suspension part 32 can be implemented in various forms, such as through holes, blind holes, U-shaped grooves, or annular grooves, all of which can achieve the suspension function.

[0036] Furthermore, in some embodiments, the extension rod suspension part 32 is a through hole extending through both sides of the extension rod 3. The suspension method of the extension rod 3 is consistent with that of the handle 2, which is simple and effective. An additional advantage is that when the extension rod 3 and handle 2 are assembled or stored side-by-side, their through holes may be aligned, allowing for integrated fixing using the same buckle or rope, further improving the convenience of storage and organization.

[0037] Furthermore, in some embodiments, the handle is cylindrical, and / or the lever is cylindrical. For example, both the handle 2 and the lever 3 are cylindrical rods.

[0038] The cylindrical rod has no sharp edges, making it less likely to interfere with surrounding obstacles when rotating in narrow spaces. It is easy to operate and comfortable to hold, conforming to ergonomics.

[0039] By implementing this utility model, the following beneficial effects can be achieved: This utility model relates to a wrench set suitable for confined spaces, particularly for such spaces. The wrench head engages with the fastener to be removed or installed via a slot. When greater torque is required, a lever is used to apply load, loosening or tightening the fastener. The head can then be rotated 360° via the handle, improving efficiency. This allows for quick loosening or tightening of fasteners in confined spaces, reducing space constraints.

[0040] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, without departing from the concept of the present utility model, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made. These all fall within the protection scope of the present utility model. That is, the embodiments described "in some embodiments" can be freely combined with any of the embodiments above and below. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A wrench assembly suitable for use in confined spaces, characterized in that, It includes a head (1), a handle (2) and a lever (3). The handle (2) is perpendicular to the head (1) and fixedly connected. The lever (3) is detachably connected to the handle (2) and is arranged approximately parallel to the head (1). The head (1) is provided with a slot (11) for holding fasteners for installation and removal.

2. The wrench assembly suitable for confined spaces according to claim 1, characterized in that, The handle (2) has a connecting hole (21) at one end near the head (1), and the force rod (3) has a connecting part (31) at one end. The connecting part (31) is detachably connected to the connecting hole (21).

3. The wrench assembly suitable for confined spaces according to claim 2, characterized in that, The connecting part (31) and the connecting hole (21) are detachably connected by plug-in or threaded engagement.

4. The wrench assembly suitable for confined spaces according to claim 1, characterized in that, The handle (2) is further provided with at least one handle suspension part (22) for connecting a portable item at one end away from the head (1).

5. The wrench assembly suitable for confined spaces according to claim 4, characterized in that, The handle suspension part (22) is a through hole.

6. The wrench assembly suitable for confined spaces according to claim 1, characterized in that, The end of the extension rod (3) away from the head (1) is also provided with at least one extension rod suspension part (32) for connecting the portable carrying device.

7. The wrench assembly suitable for confined spaces according to claim 6, characterized in that, The force-adding rod suspension part (32) is a through hole.

8. The wrench assembly suitable for confined spaces according to any one of claims 1-7, characterized in that, The rotation radius of the head (1) is less than 25 mm.

9. The wrench assembly suitable for confined spaces according to any one of claims 1-7, characterized in that, The height of the handle (2) is 90mm-100mm.

10. The wrench assembly suitable for confined spaces according to any one of claims 1-7, characterized in that, The handle (2) is cylindrical, and / or the force bar (3) is cylindrical.

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