Multifunctional bolt

Abstract

The utility model discloses a multifunctional bolt which comprises a thread part, and the upper end of the thread part is sequentially provided with a dismounting part, a twisting-off part and a falling-off part. At least one pair of planes is symmetrically arranged at the upper end of the dismounting part. The anti-over-screwing device has a torque limiting function and is used for preventing over-screwing; after the falling part is broken, a special disassembly interface (a symmetric plane) is provided to realize convenient maintenance; accurate control of pretightening force and convenience in disassembly are considered; misoperation is prevented to the greatest extent; the structure is simple, manufacturing is easy, and special tools are not needed.

Description

Technical Field

[0001] This utility model relates to the field of mechanical connection components, and in particular to a multifunctional bolt. Background Technology

[0002] In engineering fields such as machinery, construction, and automobiles, bolted connections are one of the most commonly used fastening methods. To ensure the reliability and safety of the connection, precise preload must be applied during bolt installation: excessive preload can easily lead to plastic deformation or even failure of the bolt or the connected parts, significantly reducing the fatigue life of the connection; insufficient preload will cause the connection to loosen, resulting in load transfer failure.

[0003] In existing technology, shear bolts (also known as torque control bolts) achieve preload control by setting a breakable neck (torsion breakage section): when the tightening torque reaches a preset value, the breakable neck shears and breaks, preventing further torque transmission. For example... Figure 1 As shown, the existing design, to facilitate later maintenance, includes a hexagonal bolt head between the breakable neck and the threaded portion, allowing maintenance personnel to safely remove the bolt after the breakable neck breaks. However, in practice, it has been found that when the upper detached portion remains intact, the lower hexagonal bolt head is exposed. Operators may, due to misunderstanding, limited operating space, or tool misuse, directly apply force to tighten the lower hexagonal bolt head, causing torque to bypass the breakable neck, resulting in uncontrolled preload and component damage. This risk of misoperation due to structural design is a core problem that urgently needs to be addressed in existing shear bolts. Summary of the Invention

[0004] According to an embodiment of the present invention, a multifunctional bolt is provided, comprising:

[0005] The threaded part has a disassembly part, a break-off part and a detachment part arranged sequentially at the upper end of the threaded part;

[0006] At least one pair of planes are symmetrically arranged on the upper end of the disassembly section.

[0007] Furthermore, the detachable part is hexagonal in shape, and the lower end of the disassembly part is cylindrical.

[0008] Furthermore, the upper end of the detached part is provided with one of the following: an internal hexagonal groove, a cross-shaped groove, a straight groove, or a spline groove.

[0009] Furthermore, the diameter of the disassembly part is not greater than the diameter of the inscribed circle of the hexagonal detached part.

[0010] Furthermore, the detachment part is cylindrical, and the lower end of the disassembly part is cylindrical; the upper end of the detachment part is provided with one of the following: an internal hexagonal groove, a cross-shaped groove, a straight groove, or a spline groove.

[0011] Furthermore, the sum of the height of the plane at the upper end of the disassembly part and the height of the twisted part shall not exceed 6mm.

[0012] Furthermore, the threaded part, disassembly part, twisted part, and detachment part are integrally molded.

[0013] The beneficial effects of this utility model are:

[0014] 1. Dual protection against misoperation:

[0015] 1.1 Radial dimension isolation: The detached part is exposed, and its size conforms to conventional tools, making it convenient for conventional tools to operate. In addition, the outer part of the detachment part is circular, making it difficult to use conventional tools to clamp it, thus reducing the possibility of misoperation.

[0016] 1.2 Axial space restriction: The total height of the plane at the upper end of the disassembly part and the torsion part is ≤6mm, which excludes conventional wrench operation and ensures that the torque is transmitted only through the detachment part.

[0017] 2. Ease of maintenance: After the detached part breaks, the flat surface at the top of the disassembly part provides a dedicated force point, which is compatible with common tools (such as adjustable wrenches), solving the problem of difficulty in disassembling existing shear bolts after they break.

[0018] 3. Structural reliability: The one-piece molding process eliminates connection gaps, improves fatigue resistance, and is suitable for harsh working conditions such as vibration and high load.

[0019] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a bolt in the prior art;

[0021] Figure 2 This is a schematic diagram of a multifunctional bolt structure according to an embodiment of the present utility model (the detached part is an external hexagon).

[0022] Figure 3 for Figure 2 The main view;

[0023] Figure 4 for Figure 2 The left view;

[0024] Figure 5 This is a schematic diagram of a multifunctional bolt structure according to an embodiment of the present utility model (the upper end of the detachment part is provided with an internal hexagonal groove).

[0025] Figure 6 This is a schematic diagram of a multifunctional bolt structure according to an embodiment of the present utility model (a cross-shaped groove is provided at the upper end of the detachment part).

[0026] Figure 7 According to the embodiments of this utility model Figure 2 The diagram shows a multi-functional bolt with an internal hexagonal groove at the upper end of the detached part. Detailed Implementation

[0027] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0028] First, combine Figures 2-7 The description of the multifunctional bolt according to the embodiments of the present utility model is applicable to engineering fields such as machinery, construction, and automobiles, where the requirements for bolt preload accuracy and operational safety are high, and its application scenarios are very wide.

[0029] like Figures 2-7 As shown, the multifunctional bolt of this utility model embodiment includes:

[0030] The threaded part 1 has a disassembly part 2, a twisting part 3 and a falling part 4 arranged sequentially at its upper end. When the bolt is tightened to a certain torque, the twisting part 3 breaks and the falling part 4 falls off.

[0031] The upper end of the disassembly part 2 is provided with at least a pair of symmetrical planes 21. Instead of using external hexagonal bolt heads, the symmetrical planes 21 are provided. Operators are used to using external hexagonal wrenches, which cannot grip the cylindrical outer side of the disassembly part, thus reducing the possibility of operator error. When the detached part 4 falls off, the bolt can be unscrewed by rotating the disassembly part 2 through the pair of planes 21.

[0032] Preferably, in this embodiment, the distance between the symmetrical planes 21 is not the distance between the two sides of a conventional hexagonal open-end wrench, which can further reduce the possibility of misoperation.

[0033] Furthermore, such as Figures 2-4 As shown, in this embodiment, the detachment part 4 is hexagonal in shape and the lower end of the disassembly part 2 is cylindrical, which further reduces the possibility that the operator will not unscrew the detachment part 4 but unscrew the disassembly part 2.

[0034] Furthermore, such as Figures 2-4 As shown in Figures 7 and 8, in this embodiment, the upper end of the detachment part 4 is provided with one of the following: an internal hexagonal groove, a cross-shaped groove, a straight groove, or a spline groove, providing multiple ways to screw the detachment part 4.

[0035] Furthermore, such as Figures 2-3 As shown, in this embodiment, the diameter of the disassembly part 2 is not greater than the inner circle diameter of the outer hexagonal detachment part 4. At this time, when the operator jams the detachment part 4 laterally with the wrench, it will not jam the disassembly part 2 together (especially jam a pair of planes 21), which is used to further prevent the operator from misoperating.

[0036] Furthermore, such as Figures 5-6 As shown, in this embodiment, the detachment part 4 is cylindrical, and the lower end of the disassembly part 2 is cylindrical. The upper end of the detachment part 4 is provided with one of the following: an internal hexagonal groove, a cross-shaped groove, a straight groove, or a spline groove. When the operator notices that the upper end of the detachment part 4 is provided with an internal hexagonal groove, a cross-shaped groove, a straight groove, or a spline groove, he can realize that the disassembly part 2 is not the place to be screwed, and thus take the appropriate tool to screw the detachment part 4, further preventing the operator from operating it incorrectly.

[0037] Furthermore, such as Figure 3 As shown, in this embodiment, the sum D of the height of the plane 21 at the upper end of the disassembly part 2 and the height of the twisted part 3 is not greater than 6mm. Generally, the thickness of the adjustable wrench is greater than 6mm. When the operator wants to use the wrench to hold the plane 21 to tighten the bolt, he will give up due to the size limitation, which further reduces the possibility of misoperation.

[0038] Furthermore, such as Figure 3 As shown, in this embodiment, the threaded part 1, the disassembly part 2, the twisted part 3, and the detached part 4 are integrally formed.

[0039] Working principle: When in use, use the corresponding tool to screw on the detachment part 4, so that the threaded part 1 enters the corresponding position until the predetermined torque is reached, the twisted part 3 breaks, and the detachment part 4 falls off. When it is necessary to remove the bolt later, use a wrench to hold it on the symmetrical plane 21 to unscrew the bolt.

[0040] Above, refer to Figures 2-7 This invention describes a multifunctional bolt according to an embodiment of the present invention, which has a torque limiting function to prevent over-tightening; after the detached part 4 breaks, a dedicated disassembly interface (symmetric plane 21) is provided for convenient maintenance; it takes into account both precise control of preload and ease of disassembly; it greatly prevents misoperation; it has a simple structure, is easy to manufacture, and requires no special tools.

[0041] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes that element.

[0042] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A multi-functional bolt characterized by, Include: The threaded portion has a disassembly portion, a break-off portion, and a detachment portion sequentially provided at its upper end. The upper end of the disassembly section has at least one pair of symmetrical planes.

2. The multi-functional bolt according to claim 1, wherein The detachable part is hexagonal in shape, and the lower end of the disassembly part is cylindrical.

3. The multi-functional bolt according to claim 2, wherein The upper end of the detached part is provided with one of the following: an internal hexagonal groove, a cross-shaped groove, a straight groove, or a spline groove.

4. The multi-functional bolt according to claim 2 or 3, wherein The diameter of the disassembly part is not greater than the diameter of the inscribed circle of the hexagonal detachment part.

5. The multi-functional bolt according to claim 1, wherein The detachable part is cylindrical, and the lower end of the disassembly part is cylindrical; the upper end of the detachable part is provided with one of the following: an internal hexagonal groove, a cross-shaped groove, a straight groove, or a spline groove.

6. The multi-functional bolt according to claim 1 or 2 or 5, wherein The sum of the height of the plane and the height of the torn portion is no greater than 6mm.

7. The multi-functional bolt according to claim 1, wherein The threaded portion, the disassembly portion, the twisted portion, and the detached portion are integrally formed.

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