Bolt fastening auxiliary tool and bolt fastening tool

Abstract

The utility model relates to operation tool technical field, the utility model provides a kind of bolt fastening auxiliary tool and bolt fastening tool, including connecting plate, spanner connecting part being arranged at the first end of connecting plate and sleeve connecting part being arranged at its second end.The tool is arranged by connecting plate and spanner at angle, forms the off-center transmission path between spanner working end and sleeve, is effectively fastened to flange bolt under the lateral limited working condition of wall, pipeline or equipment component.This structure makes the force arm and rotation space of spanner can avoid obstacle, sleeve is located in the direction of being easily in position to accurately sleeve into nut, while guaranteeing torque effective transmission, without spanner and bolt central axis strict alignment, significantly improve the operability, fastening efficiency and reliability of space limited position.

Description

Technical Field

[0001] This utility model relates to the field of operating tool technology, and in particular to a bolt fastening auxiliary tool and bolt fastening tool. Background Technology

[0002] In on-site assembly and maintenance, bolt preload torque is typically achieved using a torque wrench. A torque wrench generates the required preload by applying torque over a lever arm of a certain length; therefore, sufficient turning space is required to perform the torque operation.

[0003] However, in actual engineering sites, there are often situations where space is limited, such as being blocked by walls, pipelines, equipment casings or other components, which makes it difficult for the torque wrench to get enough angle or to be positioned. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a bolt fastening auxiliary tool and bolt fastening tool to facilitate bolt fastening in situations where space is limited.

[0005] To achieve the above and other related objectives, this utility model proposes a bolt fastening auxiliary tooling, comprising:

[0006] Connecting plate;

[0007] A wrench connection part is provided at the first end of the connecting plate and is used to connect the working end of the wrench.

[0008] A sleeve connecting part is provided at the second end of the connecting plate and is used to connect the sleeve.

[0009] In one specific embodiment of this utility model, the connecting plate is an arc-shaped plate.

[0010] In one specific embodiment of this utility model, the first end of the connecting plate is provided with a hexagonal hole, the wrench connecting part includes a hexagonal post, the hexagonal post is used to insert into the hexagonal hole, and a first square hole is coaxially provided on the hexagonal post, the first square hole is used to allow the end of the connecting wrench to be inserted.

[0011] In one specific embodiment of this utility model, the hexagonal prism is provided with a first limiting lug in the circumferential direction.

[0012] In one specific embodiment of this utility model, the first limiting lug is disposed at the middle part of the length direction of the hexagonal prism.

[0013] In one specific embodiment of this utility model, the second end of the connecting plate is provided with a second square hole, and the sleeve connecting part includes a square post, which is used to insert into the second square hole and the blind hole on the sleeve.

[0014] In one specific embodiment of this utility model, a second limiting lug is provided in the circumferential direction of the square column.

[0015] In one specific embodiment of this utility model, the second limiting lug is disposed at one end of the square post near the connecting plate.

[0016] This utility model also proposes a bolt fastening fixture, including:

[0017] The bolt fastening auxiliary tooling is the aforementioned bolt fastening auxiliary tooling;

[0018] A wrench, detachably connected to the wrench connection part;

[0019] Multiple sleeves are provided, and the sleeves are detachably connected to the sleeve connecting parts.

[0020] In one specific embodiment of this utility model, the length direction of the connecting plate is arranged at an angle to the length direction of the wrench.

[0021] The beneficial effects of this utility model are as follows: by arranging the connecting plate and the wrench at an angle, an offset force transmission path is formed between the working end of the wrench and the sleeve, so that the flange bolts can still be effectively tightened even in laterally restricted conditions such as walls, pipes or equipment components. This structure allows the lever arm and rotation space of the wrench to avoid obstacles, and the sleeve is located in a direction that is easy to position so that the nut can be put on. While ensuring torque transmission, it is not necessary to align the wrench directly with the center of the bolt, thereby improving the accessibility and ease of operation in restricted positions. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the connecting plate of the bolt fastening auxiliary tooling in one embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the end face of the hexagonal column of the bolt fastening auxiliary tooling in one embodiment of the present invention;

[0025] Figure 3 This is a side view of the hexagonal column of the bolt fastening auxiliary tooling in one embodiment of the present invention;

[0026] Figure 4This is a schematic diagram of the end face of the square column of the bolt fastening auxiliary tooling in one embodiment of the present invention;

[0027] Figure 5 This is a side view of the square column of the bolt fastening auxiliary tooling in one embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram showing the bolt tightening auxiliary tooling in use according to one embodiment of the present invention. Reference numerals: 1. Wrench; 10. Connecting plate; 11. Hexagonal hole; 12. Second square hole; 20. Wrench connecting part; 21. Hexagonal column; 22. First limiting lug; 23. First square hole; 30. Sleeve connecting part; 31. Square column; 32. Second limiting lug. Detailed Implementation

[0029] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0030] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0031] In on-site assembly and maintenance, bolt preload torque is typically achieved using a torque wrench. A torque wrench generates the required preload by applying torque over a lever arm of a certain length; therefore, sufficient turning space is required to perform the torque operation. This method is simple, intuitive, and widely used for connections such as flanges and brackets in conventional open spaces.

[0032] However, in actual engineering sites, space constraints are often present, such as being adjacent to walls, pipelines, equipment casings, or other components, making it difficult for the torque wrench to achieve sufficient rotation or to be positioned correctly. Such confined locations can prevent some bolts or flange nuts from being tightened as required by the torque wrench, or even if they can be positioned, the applied torque may not meet design requirements. To overcome space limitations, on-site personnel sometimes use alternative tools or temporary workarounds, but these methods often fail to guarantee torque accuracy or consistency.

[0033] Unreliable bolt preload or uneven bolt tension can lead to a series of engineering problems, including insufficient sealing surface tightness causing leaks, uneven stress distribution on the contact surface accelerating material fatigue, operational safety hazards caused by loose or broken bolts, and downtime losses due to frequent repairs and maintenance. Furthermore, unreliable tightening conditions also affect the long-term reliability and service life of equipment, placing an additional burden on maintenance and management.

[0034] Therefore, the existing method of tightening bolts with a torque wrench has obvious applicability and reliability defects in space-constrained field conditions, and there is an urgent need for improved solutions or alternative technologies that can still ensure the accuracy and consistency of preload torque in confined locations.

[0035] like Figure 1-6 As shown, in order to achieve the above-mentioned objectives and other related objectives, this utility model proposes a bolt fastening auxiliary tooling, including a connecting plate 10, a wrench connecting part 20 and a sleeve connecting part 30.

[0036] The wrench connection part 20 is disposed at the first end of the connecting plate 10 and is used to connect the working end of the wrench 1.

[0037] The sleeve connecting part 30 is disposed at the second end of the connecting plate 10 and is used to connect the sleeve.

[0038] According to Newton's third law, for every action, there is an equal and opposite reaction. When a torque is applied to one end of a rigid rod, a corresponding counter-torque will be generated within the rod to maintain torque balance. Simultaneously, according to the static equilibrium condition, the system must satisfy the requirement that the net torque is zero, i.e., the sum of all external torques equals zero, for the system to be in equilibrium. Therefore, regardless of the shape of the rigid rod (straight, L-shaped, S-shaped, or complex), as long as the rod is sufficiently rigid and only one end is fixed, the torque applied to the other end will inevitably be completely transmitted through the rod to the fixed end, generating an equal and opposite counter-torque.

[0039] Utilizing the above principle, the connecting plate 10 in the designed bolt tightening auxiliary tooling acts as a rigid rod. The torque is applied by the wrench connection 20, and the connecting plate 10 transmits and cancels this torque through its fixed end. By arranging the connecting plate 10 and the wrench 1 at a certain angle, an offset force transmission path is formed between the working end of the wrench 1 and the sleeve, achieving effective tightening of flange bolts in laterally confined conditions such as walls, pipes, and equipment components. This structural design allows the lever arm and rotation space of the wrench 1 to bypass obstacles, while the sleeve is positioned in a direction conducive to accurate insertion of the nut, ensuring effective torque transmission without requiring strict alignment between the wrench 1 and the bolt's central axis. This design significantly improves operability and tightening efficiency in space-constrained locations.

[0040] like Figure 1As shown, in a specific embodiment of this utility model, the connecting plate 10 is an arc-shaped plate. The main purpose of this arc-shaped design is to match the circular cross-section of the pipe, thereby better adapting to environments with limited space. This shape of the connecting plate 10 provides more room for the fastening tool to move when it is close to pipes, walls, or other components, avoiding collisions with surrounding objects. With the application of the arc-shaped connecting plate 10, the operator can apply torque more flexibly to achieve precise bolt tightening. This design greatly improves the operability of the tool in narrow areas, making it possible to use the wrench 1, which was originally difficult to position, smoothly in complex field environments. At the same time, the arc-shaped connecting plate 10 effectively reduces the operational difficulties caused by space constraints, thereby ensuring that the preload torque required for the bolt can be accurately applied, improving the tightening quality and equipment safety.

[0041] like Figure 1-3 As shown, in a specific embodiment of this utility model, the first end of the connecting plate 10 has a hexagonal hole 11, and the wrench connecting part 20 includes a hexagonal post 21. The hexagonal post 21 is inserted into the hexagonal hole 11, and a first square hole 23 is coaxially formed on the hexagonal post 21 for the end of the wrench 1 to be inserted. The first end of the connecting plate 10 has a hexagonal hole 11, which forms a basic connecting interface. The wrench connecting part 20 includes a hexagonal post 21, which can be matched and inserted into the hexagonal hole 11 to form a torque-transmitting anti-rotation fit. A first square hole 23 is coaxially formed on the hexagonal post 21 for the working end (square tenon) of the standard torque wrench 1 to be inserted. This structural design forms a modular and adjustable torque transmission path. The hexagonal post 21 and hexagonal hole 11 are interlocked to achieve a reliable connection and torque transmission between the wrench connection part 20 and the connecting plate 10. This also allows the user to flexibly adjust the angle between the wrench 1 and the connecting plate 10 according to the space constraints, greatly enhancing the tooling's spatial adaptability. The first square hole 23 serves as a standardized interface, ensuring direct compatibility with commonly used torque wrenches 1, enabling torque to be accurately transmitted from the wrench 1 to the connecting plate 10 via the hexagonal post 21. This solution effectively overcomes the problem of tools not being able to operate at ideal angles in confined spaces while ensuring connection rigidity and torque accuracy, improving the flexibility and reliability of tightening operations.

[0042] like Figure 2 , 3As shown, in a specific embodiment of this utility model, a first limiting lug 22 is provided on the circumference of the hexagonal column 21. This first limiting lug 22 protrudes radially from the outer surface of the hexagonal column 21, forming a mechanical blocking structure. The core function of this first limiting lug 22 is to achieve axial limiting. When the hexagonal column 21 is inserted into the hexagonal hole 11 of the connecting plate 10, the first limiting lug 22 can abut against the end face or corresponding structure of the connecting plate 10, thereby effectively preventing the hexagonal column 21 from accidentally slipping out of the hexagonal hole 11 under gravity or operational vibration. This design significantly improves the reliability and operational safety of the tooling assembly, ensuring that the wrench connection 20 and the connecting plate 10 remain firmly connected during tightening operations in complex postures, avoiding work interruptions or potential risks caused by component separation, and further enhancing the stability of the tooling in confined spaces.

[0043] like Figure 3 As shown, in a specific embodiment of this utility model, the first limiting lug 22 is disposed at the middle of the hexagonal column 21 along its length. By positioning the first limiting lug 22 at the middle of the hexagonal column 21, the first limiting lug 22 is axially away from both ends of the hexagonal column 21. This arrangement, after the hexagonal column 21 is inserted into the hexagonal hole 11 of the connecting plate 10, provides sufficient space to accommodate the thickness of the connecting plate 10, and allows the columnar portions on both sides of the first limiting lug 22 to penetrate deeply into the hole for stable support and torque transmission, thereby optimizing the overall force distribution. This design effectively improves the stability and balance of the connection, preventing uneven loading and wear that may result from excessively long cantilever arms or insufficient support, and ensuring the structural integrity and long-term reliability of the tooling under high torque loads.

[0044] In one specific embodiment of this utility model, such as Figure 1-6 As shown, the second end of the connecting plate 10 has a second square hole 12, such as... Figure 4 , 5 As shown, the sleeve connection part 30 includes a square post 31, which is used to insert into the second square hole 12 and the blind hole on the sleeve. This design utilizes a standard square interface to create a fast and reliable torque output end. The square post 31 forms an anti-rotation fit with the second square hole 12 and the blind hole of the sleeve through angular contact, ensuring efficient and slip-free torque transmission from the connecting plate 10 to the sleeve. This connection method enables quick installation and replacement of the sleeve, significantly improving the versatility and ease of operation of the tooling. Its direct and rigid connection characteristics effectively ensure a high degree of consistency between the torque finally applied to the bolt or nut and the input value of the wrench 1, fundamentally meeting the core requirement of precise control of preload torque in confined spaces.

[0045] like Figure 4 , 5As shown, in a specific embodiment of this utility model, a second limiting lug 32 is provided circumferentially on the square post 31. This second limiting lug 32 extends radially from the outer surface of the square post 31 and functions similarly to the first limiting lug 22 of the wrench connection 20, primarily for axial positioning of the sleeve. When the square post 31 is simultaneously inserted into the second square hole 12 of the connecting plate 10 and the blind hole of the sleeve, the second limiting lug 32 abuts against the end face of the sleeve or the structure of the connecting plate 10, forming an effective mechanical block. This design reliably prevents the sleeve from falling off due to gravity or changes in posture during operation, greatly improving the convenience and safety of tooling use, ensuring the continuity and reliability of fastening operations in complex working conditions with poor visibility or limited space, and avoiding the operational burden and risks associated with frequent sleeve picking and installation.

[0046] like Figure 5 As shown, in a specific embodiment of this utility model, the second limiting lug 32 is disposed at one end of the square post 31 near the connecting plate 10. By placing the second limiting lug 32 at this specific position on the square post 31, it is positioned close to the end face of the connecting plate 10 after assembly. This arrangement allows the square post 31 to extend into the blind hole of the sleeve with most of its effective length, thereby achieving maximum mating depth and support stability when transmitting torque. This not only optimizes the reliability of torque transmission and reduces potential shaking or wear due to insufficient mating, but also ensures the rigidity and integrity of the overall connection between the sleeve and the tooling by embedding the limiting structure near the connection interface, effectively improving operational stability under high load conditions and extending the tool's service life.

[0047] like Figure 6 As shown, this utility model also proposes a bolt fastening fixture, including the aforementioned bolt fastening auxiliary fixture, wrench 1, and socket.

[0048] The wrench 1 is detachably connected to the wrench connecting part 20;

[0049] Multiple sleeves are provided, and the sleeves are detachably connected to the sleeve connection part 30.

[0050] This bolt tightening fixture integrates a dedicated auxiliary fixture, a standard wrench 1, and multiple sizes of sockets into a complete operating system, forming a modular, multi-functional fastening tool kit. The wrench 1 provides standardized torque input, the auxiliary fixture is responsible for reliably transmitting torque to confined spaces, and the multiple different sizes of sockets allow the fixture to be adapted to bolts or nuts of various sizes, greatly expanding its application range.

[0051] like Figure 6As shown, in a specific embodiment of this utility model, the length direction of the connecting plate 10 is arranged at an angle to the length direction of the wrench 1. This angled arrangement is the core design of this utility model for achieving space avoidance. By making the lever arm of the wrench 1 form a certain angle with the connecting plate 10 pointing to the bolt, the operating area of ​​the wrench 1 can be shifted from directly above the bolt to the side or other positions with ample space. Based on the principle of rigid body torque transmission, this angle change does not affect the equivalent transmission of torque value, but it completely changes the spatial trajectory of the force application point. This design allows the tooling to cleverly bypass adjacent pipes, walls, or equipment casings and guide the larger operating space required to apply torque to the usable area, thereby directly solving the fundamental problem in the background art where the wrench 1 cannot operate due to insufficient space, and greatly expanding the applicability of the tool in extremely narrow environments.

[0052] In summary, by using the rigid connecting plate 10 and its angled arrangement, the force application point of the wrench 1 is flexibly transferred from directly above the bolt to a laterally open space, cleverly avoiding obstruction from obstacles. This fundamentally solves the industry problem of traditional wrenches 1 being unable to be positioned or rotated in extremely confined environments such as adjacent pipes or walls. Based on the rigid body torque transmission principle, it ensures that regardless of whether the connecting plate 10 is straight, curved, or has other adaptable complex shapes, the input torque can be transmitted to the bolt equally and accurately, guaranteeing the accuracy and consistency of the preload and eliminating safety hazards such as leakage and fatigue caused by insufficient or uneven torque. Its modular interface design (such as the fit between the hexagonal column 21 and the square hole) and limiting structure (such as the first and second limiting lugs 32) further improve the assembly reliability, operational safety, and adaptability to bolts of different specifications, significantly improving the efficiency, quality, and overall reliability of fastening operations in confined spaces, while reducing maintenance costs and safety risks.

[0053] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0054] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

Claims

1. A bolt fastening auxiliary tooling, characterized in that, include: Connecting plate; A wrench connection part is provided at the first end of the connecting plate and is used to connect the working end of the wrench. A sleeve connecting part is provided at the second end of the connecting plate and is used to connect the sleeve.

2. The bolt tightening auxiliary tooling according to claim 1, characterized in that, The connecting plate is an arc-shaped plate.

3. The bolt fastening auxiliary tooling according to claim 1, characterized in that, The first end of the connecting plate has a hexagonal hole, and the wrench connecting part includes a hexagonal post. The hexagonal post is used to insert into the hexagonal hole, and a first square hole is coaxially provided on the hexagonal post for the end of the connecting wrench to be inserted.

4. The bolt tightening auxiliary tooling according to claim 3, characterized in that, The hexagonal prism is provided with a first limiting lug on its circumference.

5. The bolt fastening auxiliary tooling according to claim 4, characterized in that, The first limiting lug is located at the middle of the length direction of the hexagonal prism.

6. The bolt tightening auxiliary tooling according to claim 1, characterized in that, The second end of the connecting plate has a second square hole, and the sleeve connecting part includes a square post, which is used to insert into the second square hole and the blind hole on the sleeve.

7. The bolt fastening auxiliary tooling according to claim 6, characterized in that, The square column is provided with a second limiting lug in the circumferential direction.

8. The bolt fastening auxiliary tooling according to claim 7, characterized in that, The second limiting lug is disposed at one end of the square post near the connecting plate.

9. A bolt fastening fixture, characterized in that, include: The bolt fastening auxiliary tooling is the bolt fastening auxiliary tooling as described in any one of claims 1-8; A wrench, detachably connected to the wrench connection part; Multiple sleeves are provided, and the sleeves are detachably connected to the sleeve connecting parts.

10. The bolt fastening fixture according to claim 9, characterized in that, The connecting plate is arranged at an angle to the length direction of the wrench.

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