An easy-to-disassemble bolt

Abstract

This utility model discloses an easy-to-disassemble bolt, specifically relating to the field of bolt disassembly technology. Its features include: a hexagonal through-slot coaxial with the bolt shaft is formed along the axial direction at the center of the bolt head; a push rod, a hexagonal base, and a pre-compressed helical spring are provided within the hexagonal through-slot; one end of the push rod is fixedly connected to the surface of the hexagonal base, which is annularly fitted within the hexagonal through-slot; the other end of the hexagonal base contacts the helical spring, and the other end of the helical spring abuts against the bottom of the hexagonal through-slot; the other end of the push rod extends slightly beyond the bolt head, supported by the helical spring. This utility model utilizes adjustable-angle rotating handles at both ends of the hexagonal bolt head, which, through a pin, allow for arc-shaped unfolding or retraction. Workers can directly rotate the bolt by hand to complete disassembly and assembly, reducing reliance on external tools such as wrenches. This is particularly suitable for working conditions with limited operating space, such as inside equipment or in pipe gaps, significantly improving maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of bolt disassembly technology, specifically to a bolt that is easy to disassemble. Background Technology

[0002] Bolts, as one of the most commonly used mechanical fasteners, are widely used in various mechanical equipment, engineering structures and other fields. However, under long-term use or specific working conditions (such as humid, corrosive environments, high temperature, dust, etc.), bolts (especially the screw part) and their mating threaded holes are prone to corrosion, adhesion or foreign object jamming. In addition, in confined spaces or complex structures, it is often difficult to apply an effective axial ejection force to the end of the screw when disassembling bolts.

[0003] Currently, common methods for removing such difficult-to-loosen bolts include:

[0004] 1. Tapping method: Use a hammer to tap the head of the bolt or the end of the thread. This method is inconvenient to operate (especially when space is limited), and it is easy to damage the bolt head, threads or surrounding parts, and the effect is limited.

[0005] 2. Pulling method: This method uses special pulling tools. It requires additional tools and operating space, and is difficult to apply to bolts in deep holes or special locations. It is also more expensive.

[0006] 3. Destructive methods: such as drilling, gas cutting, etc. This method will completely destroy the bolt, requiring replacement with a new part, which is time-consuming, labor-intensive, costly, and may damage the thread of the bolt.

[0007] Therefore, to address the above problems, a new bolt structure is designed that is relatively simple and reliable, can be disassembled without the aid of external tools, is easy to manufacture, and does not affect the normal tightening function of the bolt, so as to solve the problem of difficult bolt disassembly in the existing technology and improve maintenance efficiency. Utility Model Content

[0008] The purpose of this invention is to provide an easy-to-disassemble bolt to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a disassembly-friendly bolt, comprising a screw rod and a screw head disposed at one end of the screw rod, characterized in that: a hexagonal through groove coaxial with the screw rod is provided at the center of the screw head along the axial direction; a push rod, a hexagonal base, and a pre-compressed helical spring are disposed within the hexagonal through groove; one end of the push rod is fixedly connected to the surface of the hexagonal base; the hexagonal base is circumferentially fitted within the hexagonal through groove; the other end of the hexagonal base contacts the helical spring; the other end of the helical spring abuts against the bottom of the hexagonal through groove; the other end of the push rod extends slightly beyond the end face away from the screw head, supported by the helical spring; a limiting boss is connected to the open end of the hexagonal through groove through a limiting structure; the limiting boss presses the push rod into the hexagonal through groove under the clamping force of the helical spring; when the limiting boss is disassembled, the helical spring releases its elastic force to push the hexagonal base, moving the push rod along the axial direction of the screw rod extending beyond the screw head.

[0010] Preferably, the screw head has a hexagonal structure with pins fixedly installed at both ends. A semi-circular rotating handle is fixedly connected to the end of the pin. The rotating handle can be adjusted in angle by the pin and facilitates the disassembly of the bolt without the use of external workpieces.

[0011] Preferably, the push rod extends from one end of the screw head end face and has a disassembly through hole, which facilitates the disassembly of the bolt by passing an external workpiece through the disassembly through hole.

[0012] Preferably, the limiting structure includes a threaded groove inside the opening end of the hexagonal through slot and a threaded groove at the contact end of the limiting boss, wherein the threaded groove and the threaded groove are adapted to each other.

[0013] Preferably, the outer end face of the limiting boss has a hexagonal structure, which facilitates external disassembly.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. This utility model utilizes an ejection mechanism consisting of a push rod, a hexagonal base, and a helical spring installed inside the hexagonal through-slot of the screw head and screw rod. When it is necessary to disassemble a bolt that is difficult to loosen due to rust, adhesion, or foreign object jamming, simply remove the limiting boss. The pre-compressed helical spring releases its elasticity instantly, and the push rod is forcefully pushed out of the hexagonal through-slot along the screw rod axis through the hexagonal base. Then, the disassembly through-hole at the protruding end of the push rod can be rotated through an external workpiece, thereby rotating and disassembling the bolt as a whole without the need for external hammering or pulling tools, significantly reducing the difficulty of disassembly operation and the risk of component damage.

[0016] 2. This utility model utilizes adjustable angle rotating handles at both ends of the hexagonal screw head, which can be opened or closed in an arc shape through a pin. Workers can directly rotate the bolt by hand to complete the disassembly and assembly, reducing the reliance on external tools such as wrenches. It is especially suitable for working conditions where the operating space is limited, such as inside equipment or in pipe gaps, and greatly improves maintenance efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of the hexagonal through groove of this utility model.

[0020] Figure 4 This is a schematic diagram of the hexagonal base of this utility model.

[0021] Figure 5 This is a top view of the hexagonal through-slot of this utility model.

[0022] In the diagram: 1. Screw; 2. Screw head; 3. Hexagonal through slot; 31. Threaded groove; 4. Top rod; 41. Disassembly through hole; 5. Hexagonal base; 6. Helical spring; 7. Limiting protrusion; 71. Thread; 8. Pin; 9. Rotary handle. Detailed Implementation

[0023] 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.

[0024] Example 1: This utility model provides the following... Figure 1-4 The bolt shown is easy to disassemble: it includes a screw 1 and an integrally formed hexagonal screw head 2. The hexagonal screw head 2 has a hexagonal through groove 3 coaxial with the screw 1 along the center. The hexagonal through groove 3 is provided with a push rod 4, a hexagonal base 5 and a pre-compressed helical spring 6 in sequence. The six sides of the hexagonal base 5 are tightly fitted with the inner wall of the hexagonal through groove 3 to ensure axial sliding without deviation and to provide loosening force when loosening the bolt. One end of the push rod 4 is welded and fixed to the center of the hexagonal base 5. The other end of the hexagonal base 5 contacts the helical spring 6. The other end of the helical spring 6 abuts against the bottom of the hexagonal through groove 3. The open end of the hexagonal through groove 3 is connected to a limiting boss 7 through a limiting structure. The limiting boss 7 squeezes the push rod 4 into the hexagonal through groove 3 under the clamping force of the helical spring 6.

[0025] The opening end of the hexagonal through slot 3 is cylindrical, and the inner wall is provided with an internal threaded groove 31. The end face of the limiting boss 7 is screwed on by the thread 71. The outer end face of the limiting boss 7 is hexagonal, and the inner end face presses the push rod 4, so that the helical spring 6 is in a pre-compressed state. When the limiting boss 7 is unscrewed by the wrench, the helical spring 6 releases its elastic force instantly, pushing the hexagonal base 5 to slide axially, causing the push rod 4 to extend outward from the end face of the screw head 2, so that the disassembly through hole 41 is fully exposed.

[0026] Operating procedure: Unscrew the limiting boss 7, and the push rod 4 will be pushed out under the action of the spring force. Insert the pry bar into the disassembly through hole 41 and apply rotational torque to drive the bolt to rotate as a whole. During installation, press the push rod 4 into the hexagonal through groove 3 and tighten the limiting boss 7 to pre-compress the helical spring 6.

[0027] Example 2: In conjunction with Example 1, this example features symmetrical pin holes on two parallel sides of the hexagonal screw head 2, with an internal pin 8. A pair of semi-circular rotating handles 9 are fixed to both ends of the pin 8. The rotating handles 9 can be adjusted from 0° to 180° via the pin 8 to achieve arc-shaped unfolding or retraction. Workers can directly rotate the bolt by hand to complete the disassembly and assembly, reducing reliance on external tools such as wrenches. This is especially suitable for working conditions where operating space is limited, such as inside equipment or in pipe gaps, significantly improving maintenance efficiency.

[0028] Working principle: The pre-compressed helical spring 6 stores elastic potential energy. When the limiting boss 7 is removed, the spring force is converted into the axial impact force of the push rod 4 through the hexagonal base 5. Under the action of the spring force, the push rod 4 pushes out the screw head 2. The pry bar is inserted into the disassembly through hole 41 at the end of the push rod 4, and the rotational torque is applied to drive the bolt to rotate as a whole for bolt disassembly. The adjustable angle rotating handles 9 set at both ends of the hexagonal screw head 2 can be opened or closed in an arc shape through the pin 8. The workers can directly rotate the bolt by hand to complete the disassembly and assembly, reducing the reliance on external tools such as wrenches.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A detachable bolt, comprising a screw rod (1) and a screw head (2) arranged at one end of the screw rod (1), characterized in that: The screw head (2) has a hexagonal through groove (3) coaxial with the screw (1) along its center. The hexagonal through groove (3) contains a push rod (4), a hexagonal base (5), and a pre-compressed helical spring (6). One end of the push rod (4) is fixedly connected to the surface of the hexagonal base (5). The hexagonal base (5) is circumferentially fitted into the hexagonal through groove (3), and the other end of the hexagonal base (5) contacts the helical spring (6). The other end of the helical spring (6) abuts against the bottom of the hexagonal through groove (3). The other end of the rod (4) is supported by a helical spring (6) and extends slightly beyond the end face away from the screw head (2). The opening end of the hexagonal through groove (3) is connected to a limiting boss (7) through a limiting structure. The limiting boss (7) presses the push rod (4) into the hexagonal through groove (3) under the clamping force of the helical spring (6). When the limiting boss (7) is disassembled, the helical spring (6) is released to push the hexagonal base (5) and move the push rod (4) along the direction of the screw (1) extending out of the screw head (2).

2. The readily removable bolt of claim 1, wherein, The screw head (2) has a hexagonal structure with pins (8) fixedly connected at both ends. A semi-circular rotating handle (9) is fixedly connected to the end of the pin (8). The rotating handle (9) can be adjusted by the pin (8) and is convenient for disassembling the bolt without the use of external workpieces.

3. The readily removable bolt of claim 1, wherein, The top rod (4) extends out of the end face of the screw head (2) and has a disassembly through hole (41) to facilitate the disassembly of the bolt by passing an external workpiece through the disassembly through hole (41).

4. The readily removable bolt of claim 1, wherein, The limiting structure includes a threaded groove (31) inside the opening end of the hexagonal through groove (3) and a thread (71) at the contact end of the limiting boss (7), wherein the threaded groove (31) and the thread (71) are adapted to each other.

5. The readily removable bolt of claim 1, wherein, The outer end face of the limiting boss (7) is hexagonal, which facilitates external disassembly.

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