Electric bolt fastening device for limited space

Abstract

The utility model discloses an electric bolt fastening device for a limited space. The device is mainly composed of a device shell, a rotating wheel, a transmission disc and an electric wrench. The electric wrench is connected with the rotating wheel through a unique worm and worm wheel transmission system, axial power is converted into circumferential rotating power, 90-degree steering transmission is achieved, and the electric wrench is suitable for operation scenes which are narrow in space and inconvenient to operate. The device shell and the rotating wheel adopt a limiting structure of a clamping ring groove and an annular clamping rail, so that the rotating stability is ensured; the driving disc is installed at the bottom of the rotating wheel through a magnetic attraction structure, and driving discs with bayonets of different specifications can be rapidly replaced to adapt to various bolt sizes. In actual use, only an electric wrench needs to be connected with the device in an inserted mode, the corresponding transmission disc is selected, and bolt fastening operation can be efficiently completed in the limited space. The device is compact in structure and convenient to operate, the operation efficiency and safety are remarkably improved, and the technical blank in the field of bolt electric fastening in the limited space is filled.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical engineering technology, and specifically relates to an electric bolt fastening device for confined spaces. Background Technology

[0002] Bolt tightening is a common operation in construction, machinery assembly, and equipment maintenance. With the advancement of industrialization, electric wrenches have become widely used in various bolt tightening tasks due to their efficiency and convenience. However, in actual operating scenarios, space-constrained areas are often encountered, such as A-frame beam connections, internal equipment compartments, and pipe gaps. These areas are characterized by limited operating space, complex surrounding structures, and restricted tool movement. Traditional electric wrenches, due to their large size and fixed operating angle, are difficult to directly reach into these confined spaces to tighten bolts, resulting in low work efficiency and potentially safety hazards due to inconvenient operation.

[0003] Currently, for bolt tightening operations in confined spaces, the industry mainly uses manual tools or simple modifications to existing tools. Manual tools rely on manual operation, which suffers from unstable torque output, high labor intensity, and long operation time; while simple modified tools often lack structural reliability and versatility, failing to adapt to different bolt sizes and diverse confined space scenarios. Market research has revealed a lack of standardized mechanical devices specifically designed for confined spaces that can work in conjunction with electric wrenches to meet the needs for efficient, safe, and convenient bolt tightening. Summary of the Invention

[0004] In view of the technical problems existing in the background art, this utility model provides an electric bolt tightening device for confined spaces. Through a unique transmission system design and structural optimization, it enables the flexible application of electric wrenches in narrow spaces. This device can effectively solve the problem of limited operating space in the prior art, improve work efficiency and safety, and has broad engineering application value.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An electric bolt tightening device for confined spaces includes a housing, a rotating wheel, a transmission disc, and an electric wrench. The rotating wheel is installed inside the housing, and the transmission disc is inserted into the lower end face of the rotating wheel. The electric wrench is connected to the outside of the housing. The electric wrench is connected to the rotating wheel through a transmission system and drives the rotating wheel to rotate around its own axis. The transmission disc can tighten the bolt by rotating synchronously with the rotating wheel.

[0007] In a preferred embodiment, retaining ring grooves are correspondingly provided on the upper and lower end faces of the inner side of the device housing, and annular retaining rails are correspondingly provided on the upper and lower end faces of the rotating wheel. The annular retaining rails engage with the retaining ring grooves and limit the rotation of the rotating wheel around its own axis.

[0008] In a preferred embodiment, the transmission system includes a worm and a worm wheel ring. The two ends of the worm are perpendicularly inserted into the side wall of the device housing and can rotate freely around its own axis. The worm wheel ring is sleeved on the outer wall of the rotating wheel and fixedly connected to the rotating wheel. The worm and the worm wheel ring are meshed and connected. The rotation of the worm drives the worm wheel ring to rotate synchronously with the rotating wheel.

[0009] In a preferred embodiment, the electric wrench is equipped with a control button, the drive shaft of the electric wrench is equipped with a connecting cylinder, and the end of the worm gear is correspondingly equipped with a connector. The electric wrench is connected to the connector through the connecting cylinder.

[0010] In a preferred embodiment, the bottom surfaces of the device housing and the rotating wheel are provided with mounting grooves, and the transmission disc is installed in the mounting grooves.

[0011] In a preferred embodiment, a docking groove is provided at the center of the mounting groove, and a connecting column is vertically installed on the upper end face of the transmission disk. The transmission disk is inserted into the docking groove through the connecting column, and a magnetic block is provided in the docking groove.

[0012] In a preferred embodiment, a slot is provided at the center of the shaft on the bottom surface of the transmission disc, and the device is equipped with multiple transmission discs, wherein the slots on the transmission discs correspond to the size of the bolts to be fastened.

[0013] An electric bolt fastening device for confined spaces, this patent can achieve the following beneficial effects in practical use:

[0014] 1. The outer shell of the device and the rotating wheel form an axial limiting rotation structure through the retaining ring grooves at the upper and lower ends and the annular retaining rail. This ensures that the rotating wheel rotates stably in a confined space while significantly reducing the overall size. It can reach into restricted areas such as the A-beam connection and equipment interlayer that traditional electric wrenches cannot reach, significantly improving space adaptability.

[0015] 2. The worm gear transmission achieves power steering by using a transmission system in which the worm and worm wheel mesh to convert the axial power of the electric wrench into the circumferential rotational power of the rotating wheel. This allows the electric wrench to be connected to the worm gear connector through the side connecting sleeve, breaking through the operational limitation of traditional tools that require axial alignment with bolts. This meets the power transmission needs in multi-angle and small-pitch environments, and significantly improves operational flexibility.

[0016] 3. The transmission disc can be disassembled and assembled in seconds through the magnetic insertion structure of the upper connecting column and the docking groove. With the different specifications of the bottom bayonet and multiple specifications of spare transmission discs, it can quickly adapt to bolts of different sizes such as M6-M24, which solves the cumbersome problem of frequent socket changes required by traditional tools and improves work efficiency by more than 50%. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a bottom view of the overall structure of this utility model;

[0019] Figure 2 This is a side view of the overall structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal core structure of this utility model. Figure 1 ;

[0021] Figure 4 This is a schematic diagram of the internal core structure of this utility model. Figure 2 ;

[0022] Figure 5 This is a schematic diagram of the installation method of the transmission disc of this utility model.

[0023] In the diagram: 1. Device housing; 2. Rotating wheel; 3. Transmission disc; 4. Snap ring groove; 5. Circular rail; 6. Electric wrench; 7. Worm gear; 8. Worm wheel ring; 9. Control button; 10. Connecting cylinder; 11. Connecting head; 12. Mounting groove; 13. Docking groove; 14. Connecting column; 15. Bayonet. Detailed Implementation

[0024] like Figure 1 As shown, the core structure of an electric bolt tightening device for confined spaces includes a device housing 1, a rotating wheel 2, a transmission disc 3, and an electric wrench 6. The device housing 1 is integrally formed from high-strength aluminum alloy, in a cylindrical shape, with a hollow interior to accommodate the rotating wheel 2. The rotating wheel 2 is a disc-shaped component, mounted inside the device housing 1 via a bearing seat, and its lower end face has a insertion hole for engaging with the connecting post 14 of the transmission disc 3. The electric wrench 6 is a commercially available general-purpose lithium-ion wrench, with its side fixed to the device housing 1 via an L-shaped adapter plate. The connecting cylinder 10 at the end of the transmission shaft is made of high-strength engineering plastic, with anti-slip teeth on the inner wall, allowing for stable insertion with the connecting head 11 at the end of the worm gear 7. After the electric wrench 6 is started, power is transmitted to the rotating wheel 2 via the transmission system, driving the transmission disc 3 to rotate, thus tightening the bolt.

[0025] Preferred solutions include Figure 2As shown, the inner upper and lower end faces of the device housing 1 are provided with annular retaining grooves 4, and the outer edges of the upper and lower end faces of the rotating wheel 2 are provided with annular retaining rails 5. The annular retaining rails 5 engage with the retaining grooves 4 to restrict the axial movement of the rotating wheel 2, allowing it to rotate only around its own axis. This structure can effectively reduce the shaking of the rotating wheel 2 during rotation and ensure the coaxiality of the transmission disc 3 and the bolt.

[0026] Preferred solutions include Figure 3 As shown, the transmission system consists of a worm gear 7 and a worm wheel ring 8. The two ends of the worm gear 7 are perpendicularly connected to the side wall of the device housing 1 via bearings, and the worm wheel ring 8 is sleeved on and fixed to the outer wall of the rotating wheel 2. The worm gear 7 meshes with the worm wheel ring 8, converting the axial power of the electric wrench 6 into the circumferential rotational power of the rotating wheel 2, thus achieving a change in the direction of power and meeting the requirements for confined space operations.

[0027] Preferred solutions include Figure 4 As shown, the control button 9 of the electric wrench 6 can adjust the direction and speed of the drive shaft. The connecting cylinder 10 at the end of the drive shaft and the connecting head 11 at the end of the worm gear 7 adopt a key connection structure, with an elastic retaining ring on the outside to prevent it from falling off. The plug-in design of the connecting cylinder 10 and the connecting head 11 facilitates the quick assembly and disassembly of the electric wrench 6 and the device.

[0028] Preferred solutions include Figure 5 As shown, the bottom surfaces of the device housing 1 and the rotating wheel 2 are provided with circular mounting grooves 12 for mounting transmission discs 3, which are installed in the mounting grooves 12. A docking groove 13 is provided at the center of the mounting groove 12. A connecting post 14 is vertically mounted on the upper surface of the transmission disc 3. The transmission disc 3 is inserted into the docking groove 13 through the connecting post 14. A magnetic block is provided in the docking groove 13. A bayonet 15 is provided at the center of the bottom surface of the transmission disc 3. The device is equipped with multiple transmission discs 3, and the bayonet 15 on the transmission disc 3 corresponds to the size of the bolts to be fastened.

[0029] The connecting post 14 on the upper end face of the transmission disc 3 is fixed to the mating groove 13 at the shaft center of the mounting groove 12 by a magnetic attraction structure, ensuring the stability of the transmission disc 3 during rotation. The bayonet 15 at the shaft center of the bottom face of the transmission disc 3 is hexagonal, and the device is equipped with various specifications of transmission discs 3 to accommodate common bolt sizes. The magnetic attraction structure allows for quick replacement of the transmission disc 3, improving work efficiency.

[0030] In actual operation, firstly, select the transmission disc 3 corresponding to the clamp 15 according to the bolt specifications, align the connecting post 14 with the mating groove 13 of the mounting groove 12 and insert it; the magnetic block automatically attracts and fixes it. Then, insert the connecting cylinder 10 of the electric wrench 6 and the connecting head 11 of the worm gear 7 into place, and start the control button 9. The power of the electric wrench drives the rotating wheel 2 to rotate through the worm gear 7-worm wheel ring 8 transmission system, which drives the transmission disc 3 to rotate synchronously, achieving efficient bolt tightening in confined spaces. The entire device has a minimum working radius of only 100mm, allowing flexible operation in narrow spaces with a depth of 300mm. Actual measurements show that it is more than 3 times more efficient than traditional manual tools, with torque deviation controlled within ±5%, effectively solving the bolt tightening problem in complex structures such as herringbone beams.

[0031] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. An electric bolt tightening device for confined spaces, comprising a device housing (1), a rotating wheel (2), a transmission disc (3), and an electric wrench (6), characterized in that: The device housing (1) is equipped with a rotating wheel (2) inside. A transmission disc (3) is inserted into the lower end face of the rotating wheel (2). An electric wrench (6) is connected to the outside of the device housing (1). The electric wrench (6) is connected to the rotating wheel (2) through a transmission system and drives the rotating wheel (2) to rotate around its own axis. The transmission disc (3) can tighten the bolt by rotating synchronously with the rotating wheel (2). The bottom surfaces of the device housing (1) and the rotating wheel (2) are provided with mounting grooves (12), and the transmission disc (3) is installed in the mounting grooves (12); A docking groove (13) is provided at the center of the mounting groove (12), and a connecting column (14) is vertically installed on the upper end face of the transmission disk (3). The transmission disk (3) is inserted into the docking groove (13) through the connecting column (14), and a magnetic block is provided in the docking groove (13).

2. The electric bolt fastening device for confined spaces according to claim 1, characterized in that: The upper and lower end faces of the inner side of the device housing (1) are provided with corresponding retaining ring grooves (4), and the upper and lower end faces of the rotating wheel (2) are provided with corresponding annular retaining rails (5). The annular retaining rails (5) engage with the retaining ring grooves (4) and limit the rotation of the rotating wheel (2) around its own axis.

3. The electric bolt fastening device for confined spaces according to claim 1, characterized in that: The transmission system includes a worm (7) and a worm wheel ring (8). The two ends of the worm (7) are perpendicularly inserted into the side wall of the device housing (1) and can rotate freely around its own axis. The worm wheel ring (8) is sleeved on the outer wall of the rotating wheel (2) and fixedly connected to the rotating wheel (2). The worm (7) and the worm wheel ring (8) are meshed and connected. The rotation of the worm (7) drives the worm wheel ring (8) to rotate synchronously with the rotating wheel (2).

4. The electric bolt fastening device for confined spaces according to claim 3, characterized in that: The electric wrench (6) is equipped with a control button (9), and the end of the drive shaft of the electric wrench (6) is equipped with a connecting cylinder (10). The end of the worm (7) is equipped with a corresponding connector (11). The electric wrench (6) is connected to the connector (11) through the connecting cylinder (10).

5. The electric bolt fastening device for confined spaces according to claim 1, characterized in that: A slot (15) is provided at the center of the shaft on the bottom surface of the transmission disc (3). The device is equipped with multiple transmission discs (3). The slot (15) on the transmission disc (3) corresponds to the size of the bolt to be fastened.

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