A hexagonal bolt dismounting tool

Abstract

The utility model relates to bolt dismounting tool technical field, and disclose a kind of dismounting tool for hexagonal bolt, including box body, and the inner frame being set in the inside of box body, and inner frame is equipped with two respectively located the both ends of box body, and the bottom of box body is equipped with bottom plate, the inside of box body is equipped with two fixed clamps, and the one end of fixed clamp is combined into hexagon, the outside sliding connection between bottom plate and inner frame with fixed clamp, and fixed clamp and the inner wall sliding connection of box body, the inner wall of fixed clamp is equipped with fixed block, the inner wall of inner frame is equipped with the clamping block of sliding connection, and clamping block and the upside fixed connection of fixed clamp. With the advantages of efficient antiskid and strong clamping, synchronous linkage and convenient operation, stable structure and reliable limiting, solve the problem of traditional tool easy to slip, damaged bolt dismounting difficulty, operation cumbersome and low efficiency and tool structure instability under high pressure.

Description

Technical Field

[0001] This utility model relates to the technical field of bolt disassembly tools, specifically a disassembly tool for hexagonal bolts. Background Technology

[0002] Hex bolts are widely used as one of the most common fasteners in mechanical repair, equipment assembly, and routine maintenance. However, traditional tools such as open-end wrenches, box wrenches, or socket wrenches are often inadequate when disassembling hex bolts that are rusted, overtightened, or damaged (e.g., stripped threads or rounded corners). Traditional tools mainly rely on point or line contact between the inner wall of the tool and the six corners of the bolt head to transmit torque. When excessive force is applied, the tool is prone to slippage, which not only prevents the bolt from being disassembled but also accelerates the wear of the bolt's corners, causing them to become completely rounded, greatly hindering subsequent disassembly work.

[0003] While some specialized disassembly tools for damaged bolts exist in the current technology, such as impact wrenches or screw extractors, they either require specific power sources or are complex to operate and costly, making them unsuitable for all field conditions. Furthermore, these tools still fall short in terms of clamping stability and uniformity, failing to provide a sufficiently large and evenly distributed clamping force at the moment of disassembly, resulting in a limited success rate. Therefore, the market urgently needs a specialized disassembly tool that is simple in structure, easy to operate, and can provide strong, uniform, enveloping clamping force for hexagonal bolts, especially those with damaged bolt heads. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a tool for disassembling hexagonal bolts, which has the advantages of efficient anti-slip and strong clamping, synchronous linkage and convenient operation, stable structure and reliable limiting. It solves the problems of traditional tools being prone to slipping, difficult to disassemble damaged bolts, cumbersome operation and low efficiency, as well as the structural instability of the tool under high pressure.

[0005] (II) Technical Solution To achieve the aforementioned objectives of efficient anti-slip and strong clamping, synchronous linkage and convenient operation, and stable structure and reliable positioning, this utility model provides the following technical solution: a hexagonal bolt disassembly tool, comprising a box body and an inner frame disposed inside the box body, wherein the inner frame has two clamps respectively located at both ends of the box body, and a bottom plate is provided at the bottom of the box body. Two fixing clamps are installed inside the box body, and one end of the fixing clamps is combined into a hexagon. The bottom plate and the inner frame are slidably connected to the outer side of the fixing clamps, and the fixing clamps are slidably connected to the inner wall of the box body. The inner wall of the fixing clamps is provided with a fixing block, and the inner wall of the inner frame is provided with a slidably connected clamping block, and the clamping block is fixedly connected to the upper side of the fixing clamp.

[0006] Preferably, the inner wall of the inner frame is provided with a clamping threaded rod, and the two ends of the clamping threaded rod are respectively rotatably connected to the inner wall of the inner frame, and the clamping block is installed on the outside of the clamping threaded rod.

[0007] Preferably, the inner wall of the box is provided with a rotating rod, and the two ends of the rotating rod are respectively equipped with second gears. One end of the two clamping threaded rods is fixedly installed with a first gear, and the first gear and the second gear are meshed. The middle of the rotating rod is provided with a rotating wheel, and one side of the rotating wheel penetrates through the top of the box.

[0008] Preferably, the inner wall of the box is equipped with two sets of limiting plates, and each set of limiting plates has two limiting plates. One end of the rotating rod and the corresponding clamping threaded rod pass through the two limiting plates in sequence, and the first gear and the second gear are installed between the two limiting plates. The two sides of the first gear and the second gear are rotatably connected to one side of the corresponding limiting plate.

[0009] Preferably, the top of the box body is provided with a locking member, and one end of the locking member is rotatably connected to the top of the box body. One end of the rotating wheel is disposed on the inner wall of the locking member, and the outer contour of the rotating wheel is the same as the contour of the inner wall of the locking member.

[0010] Preferably, the outer side of the box is provided with an anti-slip sleeve, and the anti-slip sleeve is respectively provided at both ends of the outer side of the box.

[0011] (III) Beneficial Effects Compared with the prior art, this utility model provides a hexagonal bolt disassembly tool with the following advantages: This hexagonal bolt disassembly tool, through an innovative double-sided synchronous clamping mechanism, achieves full envelopment of the hexagonal bolt head, increases the effective contact area and clamping force, fundamentally solving the problems of tool slippage and bolt damage during disassembly. For hexagonal bolts with rust, rounded corners, or partial edge wear, this tool can successfully disassemble them by forcefully and evenly clamping and engaging the remaining effective part of the bolt head. The synchronous movement of the double-sided clamping mechanism is controlled by a single rotating wheel, simplifying the operation steps, achieving rapid centering and clamping, and improving disassembly efficiency. Furthermore, the multiple support and limiting system composed of the inner frame, base plate, and limiting plate ensures the overall structural strength and stability of the tool when subjected to high torque, extending the tool's service life. Attached Figure Description

[0012] Figure 1 This is a structural diagram of the present utility model; Figure 2 This is a bottom structural diagram of the present invention; Figure 3 This is a diagram of the internal structure of this utility model; Figure 4This is a structural diagram of the drive mechanism of this utility model.

[0013] In the diagram: 1. Box body; 2. Anti-slip sleeve; 3. Locking component; 4. Rotating wheel; 5. Base plate; 6. Fixing clamp; 7. Fixing block; 8. Rotating rod; 9. First gear; 10. Limiting plate; 11. Clamping threaded rod; 12. Inner frame; 13. Second gear; 14. Clamping block. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Example: Please refer to Figure 1-4 A tool for removing hexagonal bolts includes a housing 1 and an inner frame 12 disposed inside the housing 1. The inner frame 12 has two parts located at both ends of the housing 1. The bottom of the housing 1 has a base plate 5. Two fixing clips 6 are installed inside the housing 1, and one end of the fixing clips 6 is hexagonal. The base plate 5 is slidably connected to the outer side of the fixing clips 6 and the inner wall of the housing 1. The inner wall of the fixing clips 6 has a fixing block 7. The inner wall of the inner frame 12 has a slidably connected clamping block 14, and the clamping block 14 is fixedly connected to the upper side of the fixing clips 6.

[0016] The housing 1, serving as the main outer shell of the tool, not only provides structural support but also protects the internal mechanisms and the operator. Its internal space is precisely designed to accommodate all moving parts. The inner frame 12 is the core skeleton of the tool, typically made of high-strength metal. Two inner frames are fixed to both ends of the housing, providing a stable and parallel guiding foundation for the clamping mechanism. This "frame within a frame" structure greatly enhances the overall rigidity of the tool, enabling it to withstand enormous torsional forces without deformation. The clamping clip 6 is the tool's clamping and actuating component. Preferably, the inner wall of its "hexagonal" end is heat-treated to increase hardness and wear resistance. This hexagonal hole is specifically designed to match standard hexagonal bolt heads, but its unique feature is that it is an "incomplete" hexagon, with each of the two clamping clips providing a portion of the contour. The clamping clip is simultaneously slidably connected to the base plate 5, the inner frame 12, and the inner wall of the housing 1. This multi-guided design ensures that the clamping clip can only perform precise linear movement during movement, without deflection or warping, thus guaranteeing clamping accuracy and stability. The retaining blocks 7 are an innovative design that enhances the clamping effect. They can be hard alloy protrusions (such as tungsten carbide) welded or embedded in the inner wall of the retaining clamp, and their surfaces can be designed with a mesh pattern or serrations. Their main function is to bite into the metal surface of the bolt head (even if it is smooth) during clamping, providing a mechanical interlock that exceeds static friction and greatly prevents slippage. The clamping block 14 is the key hub for power transmission. It is threaded onto the clamping threaded rod and converts the rotational motion of the threaded rod into its own linear motion. The clamping block is fixedly connected to the upper side of the retaining clamp, thereby directly transmitting linear power to the retaining clamp.

[0017] The inner wall of the inner frame 12 is provided with a clamping threaded rod 11, and the two ends of the clamping threaded rod 11 are rotatably connected to the inner wall of the inner frame 12. The clamping block 14 is installed on the outside of the clamping threaded rod 11. The inner wall of the box body 1 is provided with a rotating rod 8, and the two ends of the rotating rod 8 are respectively equipped with a second gear 13. One end of the two clamping threaded rods 11 is fixedly installed with a first gear 9, and the first gear 9 and the second gear 13 are meshed. The middle of the rotating rod 8 is provided with a rotating wheel 4, and one side of the rotating wheel 4 penetrates through the top of the box body 1.

[0018] The clamping threaded rod 11 is a precision multi-start trapezoidal threaded rod or ball screw. The multi-start thread improves transmission efficiency, allowing for a large clamping displacement with only a small rotation angle. Its two ends are rotatably connected to the inner frame via bearings or bushings, ensuring smooth rotation and the ability to withstand axial forces. The rotating rod 8 extends laterally through the housing, with its two ends' second gears 13 meshing with the first gears 9 at the ends of the two clamping threaded rods. This means that when the rotating rod rotates, it simultaneously and in the same direction drives the two second gears, which in turn drive the two meshing first gears. The key lies in the gear pairing design. By selecting gears with the same module and number of teeth, the rotational speed and direction of the two clamping threaded rods are ensured to be completely consistent. This is the basis for achieving synchronous, equidistant, opposite or forward movement of the two fixed clamps. The rotating wheel 4, as the main human-machine interface, can be designed with a larger diameter to provide effortless operating torque. The wheel rim typically has anti-slip textures.

[0019] Two sets of limiting plates 10 are installed on the inner wall of the box body 1, and each set of limiting plates 10 contains two limiting plates 10. One end of the rotating rod 8 and the corresponding clamping threaded rod 11 pass through the two limiting plates 10 in sequence. The first gear 9 and the second gear 13 are installed between the two limiting plates 10, and the two sides of the first gear 9 and the second gear 13 are rotatably connected to one side of the corresponding limiting plate 10. A locking member 3 is provided on the top of the box body 1, and one end of the locking member 3 is rotatably connected to the top of the box body 1. One end of the rotating wheel 4 is set on the inner wall of the locking member 3, and the outer contour of the rotating wheel 4 is the same as the contour of the inner wall of the locking member 3. Anti-slip sleeves 2 are provided on the outer side of the box body 1, and the anti-slip sleeves 2 are respectively set at both ends of the outer side of the box body 1.

[0020] The limiting plates 10, with their plate-like structures, function as "bearing seats" and "positioners." They confine the first and second gears within a closed space, ensuring meshing accuracy and preventing disengagement due to force. Simultaneously, they provide additional support points for the rotating rod and clamping threaded rod, reducing bending deformation of the long shaft under stress and improving system stability. The locking element 3 is typically a flip-up cap with an internal hole. When the rotating wheel is adjusted to the appropriate position, the locking element is flipped down and fastened; its inner wall contour fits tightly against the non-circular end of the rotating wheel, preventing accidental rotation and providing a secure locking function. The anti-slip sleeves 2 are typically made of high-friction, highly elastic materials such as rubber or TPU, and are wrapped around both ends of the housing 1 via interference fit or adhesive bonding. Their functions are twofold: firstly, to significantly increase hand grip and prevent slippage; and secondly, to absorb some vibration and improve the operating feel.

[0021] Working principle: In the initial state, the two clamps are open, with the opening between them larger than the head of the hexagonal bolt to be removed. Align the bottom of the tool (side of the base plate) with the bolt head and place it on the bolt head, so that the bolt head is in the center of the "incomplete hexagon" formed by the two clamps. The operator holds the anti-slip sleeves at both ends of the box with one hand and rotates the rotating wheel clockwise with the other hand. The rotation of the rotating wheel drives the rotating rod that runs through the box to rotate synchronously. The second gear at both ends of the rotating rod rotates accordingly and drives the two first gears that mesh with it to rotate synchronously and in the same direction. The two first gears drive the two clamping threaded rods to rotate. Since the threads of the two clamping threaded rods have the same direction of rotation (e.g., both are right-handed), and the clamping blocks are engaged with them through threads, the rotation of the threaded rods causes the two clamping blocks to move in a straight line towards the center (i.e., the bolt direction) at the same speed along the guide rail of the inner frame. The movement of the clamping blocks pushes the two clamps fixed to them to slide along the base plate and the inner frame, and synchronously close. The hexagonal outline of the inner ends of the two clamps gradually closes, finally forming a complete hexagonal clamping hole that tightly wraps around the bolt head. Simultaneously, the retaining blocks on the inner wall of the clamping clamp, under strong clamping force, slightly bite into the bolt material, forming a strong mechanical self-locking mechanism. After confirming that the bolt is firmly clamped, the locking device can be fastened to lock the rotating wheel, preventing it from reversing and loosening under force. At this point, the operator can apply a large rotational torque to the tool (box) (e.g., by attaching the extension rod or forcefully turning it). This torque is effectively transmitted to the bolt head through the stable box, inner frame, and locked clamping clamp. Due to the large clamping contact surface, uniform pressure, and mechanical interlocking of the retaining blocks, the torque effectively overcomes the corrosion resistance of the bolt, allowing it to be smoothly unscrewed. After disassembly, rotating the rotating wheel counterclockwise reverses the entire transmission system, driving the two clamping clamps to open synchronously, allowing the tool to be removed from the bolt.

[0022] This tool uses a central input (rotating wheel) and a synchronous gear transmission system to precisely and synchronously distribute power to two linear motion mechanisms (threaded rod-clamping block), ultimately driving two grippers (fixed clamps) to achieve symmetrical, linear clamping motion. Its power comes from converting the rotary manual input into a strong, stable, and uniform radial clamping force, thereby achieving efficient and non-destructive (or low-damage) clamping of bolt heads.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tool for removing hexagonal bolts, characterized in that: The box includes a box body (1) and an inner frame (12) disposed inside the box body (1). The inner frame (12) has two parts located at the two ends of the box body (1). The bottom of the box body (1) has a base plate (5). Two fixing clips (6) are installed inside the box body (1). One end of the fixing clip (6) is combined into a hexagon. The base plate (5) and the inner frame (12) are slidably connected to the outside of the fixing clip (6). The fixing clip (6) is slidably connected to the inner wall of the box body (1). The inner wall of the fixing clip (6) has a fixing block (7). The inner wall of the inner frame (12) has a slidably connected clamping block (14). The clamping block (14) is fixedly connected to the upper side of the fixing clip (6).

2. The tool for removing hexagonal bolts according to claim 1, characterized in that: The inner wall of the inner frame (12) is provided with a clamping threaded rod (11), and the two ends of the clamping threaded rod (11) are respectively rotatably connected to the inner wall of the inner frame (12). The clamping block (14) is installed on the outside of the clamping threaded rod (11).

3. The tool for removing hexagonal bolts according to claim 2, characterized in that: The inner wall of the box (1) is provided with a rotating rod (8), and the two ends of the rotating rod (8) are respectively equipped with second gears (13). One end of the two clamping threaded rods (11) is fixedly equipped with a first gear (9), and the first gear (9) and the second gear (13) are meshed. The middle part of the rotating rod (8) is provided with a rotating wheel (4), and one side of the rotating wheel (4) penetrates the top of the box (1).

4. The tool for removing hexagonal bolts according to claim 3, characterized in that: The inner wall of the box (1) is equipped with two sets of limiting plates (10), and each set of limiting plates (10) has two limiting plates (10). One end of the rotating rod (8) and the corresponding clamping threaded rod (11) pass through the two limiting plates (10) in sequence. The first gear (9) and the second gear (13) are installed between the two limiting plates (10). The two sides of the first gear (9) and the second gear (13) are rotatably connected to one side of the corresponding limiting plate (10).

5. A tool for removing hexagonal bolts according to claim 3, characterized in that: The top of the box (1) is provided with a locking member (3), and one end of the locking member (3) is rotatably connected to the top of the box (1). One end of the rotating wheel (4) is set on the inner wall of the locking member (3), and the outer contour of the rotating wheel (4) is the same as the contour of the inner wall of the locking member (3).

6. A tool for removing hexagonal bolts according to claim 1, characterized in that: The outer side of the box (1) is provided with anti-slip sleeves (2), and the anti-slip sleeves (2) are respectively set at both ends of the outer side of the box (1).

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