A bolt tightening and loosening device for narrow space

Abstract

The utility model belongs to the narrow space bolt tight loosening device of mechanical processing technical field. The device body (1) lower part sets up the nut clamping opening spare (2), the movable sleeve rotating arm (4) in the rotating hole (3) of device body (1) upper part, the rotating arm (4) upper end is rotating rod (5), the rotating arm (4) lower end is sleeve (6), and sleeve (6) is located the nut clamping opening spare (2) just above position. The utility model discloses the narrow space bolt tight loosening device, simple structure can realize the convenient tightening and loosening of equipment nut and bolt in narrow space, and can be reused, satisfies the operation demand.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing technology, and more specifically, it relates to a bolt tightening / loosening device in a narrow space. Background Technology

[0002] In the routine maintenance and repair of mechanical equipment, the overhead crane drum is connected to the reducer via a flange. The flange is installed on the inner wall of the drum, and a bent edge is installed on the outer ring of the flange. The bent edge fits against the inner wall of the drum, and the inner wall and the bent edge are connected by bolts through which nuts are tightened, thus achieving a fixed connection between the drum and the flange. However, due to the confined space at the flange connection point, with the bolt ends located outside the drum and the nuts inside, and the reducer close to the drum with a small gap between them, the space is extremely narrow, making tightening and loosening the bolts and nuts extremely inconvenient. Traditional adjustable wrenches, open-end wrenches, or sockets are limited by their size and shape, making it difficult to reach into this confined space for operation, further hindering equipment maintenance.

[0003] Existing technology includes a device titled "Bolt Fastening Device" with publication number "CN114102499B". This technology discloses a bolt fastening device comprising a mechanical finger ring, a drive shaft, a bracket, and a rotating rod. The rotating rod is rotatably mounted on the bracket, the drive shaft engages with the rotating rod, and the mechanical finger ring engages with the drive shaft. This invention offers the following advantages: it allows the use of a robotic arm to operate and tighten bolts or nuts, providing convenient operation and a high safety factor.

[0004] However, this technology does not address the technical issues and solutions of this application. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a bolt tightening and loosening device for narrow spaces that is simple in structure, can conveniently tighten and loosen equipment nuts and bolts in narrow spaces, and can be reused to meet the needs of operation, in order to overcome the shortcomings of the existing technology.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] This utility model is a bolt tightening / loosening device for narrow spaces. The lower part of the device body is provided with a nut clamping opening. A rotating arm is movably fitted in the rotating hole at the upper part of the device body. The upper end of the rotating arm is a rotating rod, and the lower end of the rotating arm is a sleeve. The sleeve is located directly above the nut clamping opening.

[0008] The device body includes a vertical section, a rotating arm mounting section, and a nut clamping opening component mounting section. The upper end of the vertical section is connected to the rotating arm mounting section, and the lower end of the vertical section is connected to the nut clamping opening component mounting section.

[0009] The vertical section, the rotating arm mounting section, and the nut clamping opening part mounting section are an integrated structure. The vertical section and the rotating arm mounting section are arranged vertically, and the vertical section and the nut clamping opening part mounting section are arranged vertically.

[0010] The rotating arm mounting section is provided with a rotating hole, and the nut clamping opening part is provided at the end of the nut clamping opening part mounting section.

[0011] The upper end of the sleeve is provided with a polygonal locking hole, the lower end of the rotating arm is provided with a polygonal locking head, and a connecting rotating rod is inserted into the through hole at the upper end of the rotating arm.

[0012] The nut clamping opening part has a polygonal locking hole at one end and a polygonal locking head at the other end.

[0013] The polygonal clamp head of the nut clamping opening end is fixedly installed in the polygonal clamp hole at the end of the nut clamping opening end section.

[0014] The polygonal clamp at the lower end of the rotating arm is fixedly fitted into the polygonal clamp hole at the upper end of the sleeve.

[0015] The device body, nut clamping opening, rotating arm, rotating rod, and sleeve are all made of metal.

[0016] The working principle and beneficial effects of this utility model are as follows:

[0017] The bolt tightening / loosening device for narrow spaces described in this utility model has a nut-clamping opening at the lower part of the device body. This opening engages with the nut to secure it. A rotating arm is movably fitted within a rotating hole at the upper part of the device body. The rotating arm can rotate relative to the device body, and this rotation is achieved through a rotating rod passing through its upper end, ensuring effortless rotation. A sleeve is fixedly connected to the rotating arm at its lower end. Rotation of the rotating arm drives the sleeve to rotate synchronously. The sleeve engages with the bolt end, and the bolt is screwed onto the nut. This screw-on connection secures the two components. The sleeve is positioned directly above the nut-clamping opening, ensuring that when the sleeve is fitted onto the bolt end, the nut-clamping opening is precisely engaged with the nut, achieving proper positioning. This utility model specifically addresses the tightening or loosening of bolts and nuts connecting crane drums and flanges. By employing the structure of this invention, when it is necessary to tighten or loosen bolts and nuts, the nut-clamping opening piece 2 is inserted into the drum through the gap between the drum and the reducer, approaching the nut until it is secured. Then, the rotating arm rotates, causing the sleeve to approach the bolt end until it is secured. Force is applied by the rotating rod, causing the rotating arm to rotate, and the sleeve rotates synchronously with the arm. By controlling the rotation direction of the rotating rod, the bolt and nut can be tightened or loosened. After tightening or loosening, the mounting rod is rotated in the opposite direction, causing the sleeve to move away from the bolt end. The nut-clamping opening piece then exits the drum through the gap between the drum and the reducer, completing the operation. Using this device, when tightening or loosening bolts and nuts, there is no need to disconnect the drum from the reducer shaft, greatly saving maintenance time and costs. The device of this invention has a compact structure, is easy to operate, and is highly adaptable. It can be widely used in narrow spaces such as the connection bolts between the drum wall and the flange of various mechanical equipment, thus improving the efficiency and convenience of equipment maintenance. Attached Figure Description

[0018] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein:

[0019] Figure 1 This is a schematic diagram of the axial view of the bolt tightening / loosening device in a narrow space according to the present invention;

[0020] Figure 2 This is a schematic diagram of the main structure of the bolt tightening / loosening device in a narrow space according to the present invention;

[0021] Figure 3 This is a partial structural diagram of the bolt tightening / loosening device for narrow spaces described in this utility model during use;

[0022] Reference numerals in the attached drawings: 1. Device body; 2. Nut clamping opening piece; 3. Rotary hole; 4. Rotating arm; 5. Rotating rod; 6. Sleeve; 7. Vertical section; 8. Rotating arm mounting section; 9. Nut clamping opening piece mounting section; 10. Bolt end; 11. Nut; 12. Drum; 13. Reducer; 14. Flange; 15. Bending edge. Detailed Implementation

[0023] The following description, with reference to the accompanying drawings, provides a more detailed explanation of the specific embodiments of this utility model, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part:

[0024] As attached Figure 1 - Appendix Figure 3As shown, this utility model is a bolt tightening / loosening device for narrow spaces. The lower part of the device body 1 is provided with a nut-clamping opening 2. A rotating arm 4 is movably fitted into a rotating hole 3 at the upper part of the device body 1. The upper end of the rotating arm 4 is a rotating rod 5, and the lower end of the rotating arm 4 is a sleeve 6, which is located directly above the nut-clamping opening 2. This structure addresses the shortcomings of existing technologies by proposing an improved technical solution. In this structural configuration, the nut-clamping opening 2 is provided at the lower part of the device body 1, used to clamp the nut and fix it. The rotating arm 4 is movably fitted into the rotating hole 3 at the upper part of the device body 1, allowing it to rotate relative to the device body. The rotation of the rotating arm is achieved by the rotating rod 5 passing through the upper end of the rotating arm 4, ensuring effortless rotation. The lower end of the rotating arm 4 is a sleeve 6, which is fixedly connected to the rotating arm. The rotation of the rotating arm drives the sleeve to rotate synchronously. The sleeve is used to clamp onto the bolt end, and the bolt is screwed onto the nut. The screw-on connection of the bolt and nut achieves a fixed connection between the two components. The sleeve 6 is positioned directly above the nut clamping opening 2, ensuring that when the sleeve 6 is fitted onto the bolt end 10, the nut clamping opening 2 is precisely engaged with the nut 11, achieving proper clamping and positioning. This invention specifically addresses the tightening or loosening of bolts and nuts 11 in the connection between a crane drum and a flange. Using this invention, when tightening or loosening the bolt and nut 11 is required, the nut clamping opening 2 is inserted into the drum through the gap between the drum and the reducer, approaching the nut 11 until it is engaged. Then, the rotating arm 4 rotates, causing the sleeve 6 to approach the bolt end 10 until it is engaged with the bolt end 10. At this point, force is applied by the rotating rod 5, causing the rotating arm 4 to rotate. The sleeve 6 rotates synchronously with the rotating arm 4. By controlling the rotation direction of the rotating rod 5, the bolt and nut 11 can be tightened or loosened. After tightening or loosening the bolt and nut 11, the mounting rod 5 is rotated in the opposite direction, causing the sleeve 6 to move away from the bolt end 10. This allows the nut clamping opening 2 to exit the drum from the gap between the drum and the reducer, completing the operation. Using this device, tightening or loosening the bolt and nut 11 can be performed without separating the drum from the reducer shaft, significantly saving maintenance time and costs. Furthermore, this device is compact, easy to operate, and highly adaptable, making it widely applicable to various mechanical equipment in confined spaces similar to those where bolts connect the drum wall to the flange, improving the efficiency and convenience of equipment maintenance. The narrow-space bolt tightening / loosening device described in this invention has a simple structure, enabling convenient tightening and loosening of nuts and bolts in confined spaces, and can be reused to meet operational needs.

[0025] The device body 1 includes a vertical section 7, a rotating arm mounting section 8, and a nut clamping opening component mounting section 9. The upper end of the vertical section 7 is connected to the rotating arm mounting section 8, and the lower end of the vertical section 7 is connected to the nut clamping opening component mounting section 9. The vertical section 7, rotating arm mounting section 8, and nut clamping opening component mounting section 9 are an integral structure. The vertical section 7 and rotating arm mounting section 8 are arranged perpendicularly, and the vertical section 7 and nut clamping opening component mounting section 9 are arranged parallel to each other. The device body 1 is integrally formed, with a rotating hole drilled and the nut clamping opening component 2 cut to meet the requirements.

[0026] The rotating arm mounting section 8 is provided with a rotating hole 3, and the nut clamping opening section 9 is provided with a nut clamping opening 2 at its end. In the above structure, the rotating hole 3 is used for movably mounting the rotating arm 4, and the nut clamping opening 2 is used for clamping the nut 11.

[0027] The upper end of the sleeve 6 is provided with a polygonal locking hole, and the lower end of the rotating arm 4 is provided with a polygonal locking head. A rotating rod 5 is inserted into the through hole at the upper end of the rotating arm 4. The polygonal locking head at the lower end of the rotating arm 4 is fixedly locked into the polygonal locking hole at the upper end of the sleeve 6. With the above structure, the polygonal locking head and the polygonal locking hole are reliably locked, and multiple sleeves can be provided. Different sleeves are used to match bolts of different models and sizes, that is, one device can match multiple sleeves 6.

[0028] The nut clamping opening component mounting section 9 has a polygonal locking hole at one end, and the nut clamping opening component 2 has a polygonal locking head at one end. The polygonal locking head of the nut clamping opening component 2 is fixedly clamped into the polygonal locking hole at the end of the nut clamping opening component mounting section 9. With this structure, the polygonal locking head and the polygonal locking hole are reliably engaged, and multiple nut clamping opening components 2 can be provided. Different nut clamping opening components 2 are used to match nuts of different models and sizes; that is, one device can match multiple nut clamping opening components 2. The device body 1, nut clamping opening component 2, rotating arm 4, rotating rod 5, and sleeve 6 are all made of metal materials to ensure reliable strength.

[0029] The bolt tightening / loosening device for narrow spaces described in this utility model has the following structural design: A nut-clamping opening 2 is located at the lower part of the device body 1. The nut-clamping opening 2 is used to clamp the nut, thus fixing it in place. A rotating arm 4 is movably fitted into a rotating hole 3 at the upper part of the device body 1. The rotating arm can rotate relative to the device body, and this rotation is achieved by a rotating rod 5 passing through the upper end of the rotating arm 4, ensuring effortless rotation. A sleeve 6 is located at the lower end of the rotating arm 4, and is fixedly connected to the rotating arm. Rotation of the rotating arm drives the sleeve to rotate synchronously. The sleeve is used to clamp onto the bolt end 10, and the bolt is screwed onto the nut. This screw-on connection of the bolt and nut secures the two components. With the sleeve 6 positioned directly above the nut-clamping opening 2, it ensures that when the sleeve 6 is fitted onto the bolt end 10, the nut-clamping opening 2 is precisely clamped onto the nut 11, achieving clamping and positioning. This utility model specifically addresses the tightening or loosening of bolts and nuts 11 connecting a crane drum and a flange. Using the structure of this utility model, when it is necessary to tighten or loosen the bolt and nut 11, the nut clamping opening 2 is inserted into the drum through the gap between the drum and the reducer, approaching the nut 11 until the nut clamping opening 2 is locked onto the nut 11. Then, the rotating arm 4 is rotated, causing the sleeve 6 to approach the bolt end 10 until the sleeve 6 is locked onto the bolt end 10. At this time, force is applied by the rotating rod 5, causing the rotating arm 4 to rotate. The sleeve 6 rotates synchronously with the rotating arm 4. By controlling the rotation direction of the rotating rod 5, the bolt and nut 11 can be tightened or loosened. After the bolt and nut 11 are tightened or loosened, the mounting rod 5 is rotated in the opposite direction, causing the sleeve 6 to move away from the bolt end 10. Then, the nut clamping opening 2 can be removed from the drum through the gap between the drum and the reducer, completing the operation. With the device of this invention, when tightening or loosening bolts and nuts 11, it is no longer necessary to separate the drum from the reducer shaft, which greatly saves maintenance time and costs. At the same time, the device of this invention has a compact structure, is easy to operate, and is highly adaptable. It can be widely used in various mechanical equipment in confined spaces similar to those where bolts connect the drum wall to the flange, improving the efficiency and convenience of equipment maintenance.

[0030] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A bolt tightness loosening device for a narrow space, characterized by: The lower part of the device body (1) is provided with a nut clamping opening (2), and the upper part of the device body (1) is fitted with a rotating arm (4) in the rotating hole (3). The upper end of the rotating arm (4) is a rotating rod (5), and the lower end of the rotating arm (4) is a sleeve (6). The sleeve (6) is located directly above the nut clamping opening (2).

2. The tight space bolt unfastening device according to claim 1, characterized by: The device body (1) includes a vertical section (7), a rotating arm mounting section (8), and a nut clamping opening part mounting section (9). The upper end of the vertical section (7) is connected to the rotating arm mounting section (8), and the lower end of the vertical section (7) is connected to the nut clamping opening part mounting section (9).

3. The bolt tightening / loosening device for narrow spaces according to claim 2, characterized in that: The vertical section (7), the rotating arm mounting section (8), and the nut clamping opening part mounting section (9) are an integral structure. The vertical section (7) and the rotating arm mounting section (8) are arranged vertically, and the vertical section (7) and the nut clamping opening part mounting section (9) are arranged vertically.

4. The bolt tightening / loosening device for narrow spaces according to claim 3, characterized in that: The rotating arm mounting section (8) is provided with a rotating hole (3), and the nut clamping opening part (2) is provided at the end of the nut clamping opening part mounting section (9).

5. The bolt tightening / loosening device for narrow spaces according to claim 1 or 2, characterized in that: The upper end of the sleeve (6) is provided with a polygonal locking hole, the lower end of the rotating arm (4) is provided with a polygonal locking head, and the rotating rod (5) is inserted into the through hole at the upper end of the rotating arm (4).

6. The bolt tightening / loosening device for narrow spaces according to claim 2, characterized in that: The nut clamping opening part installation section (9) is provided with a polygonal clamping hole at its end, and the nut clamping opening part (2) is provided with a polygonal clamping head at its end.

7. The bolt tightening / loosening device for narrow spaces according to claim 6, characterized in that: The polygonal clip head of the nut clamping opening part (2) is fixedly installed in the polygonal clip hole at the end of the nut clamping opening part installation section (9).

8. The bolt tightening / loosening device for narrow spaces according to claim 5, characterized in that: The polygonal clip at the lower end of the rotating arm (4) is fixedly mounted in the polygonal clip hole at the upper end of the sleeve (6).

9. The bolt tightening / loosening device for narrow spaces according to claim 1 or 2, characterized in that: The device body (1), the nut clamping opening part (2), the rotating arm (4), the rotating rod (5), and the sleeve (6) are all structures made of metal materials.

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