Stud bolt with anti-thread-slipping function

Abstract

The utility model discloses a double-end bolt with an anti-thread-slipping function, belongs to the technical field of bolt structures, and provides the double-end bolt which is lower in use cost and also has the anti-thread-slipping function, the double-end bolt comprises a bolt body, an optical axis part is arranged in the middle of the bolt body, screw rod parts are arranged at the two ends of the optical axis part, and nuts are suitable for being in threaded fit with the outsides of the screw rod parts. The end, back on to the optical axis part, of each screw part is further provided with a rotation stopping column, each rotation stopping column is a regular polygon prism and is connected with an anti-skid sleeve in an inserted mode, each anti-skid sleeve is provided with a wedging cavity and comprises a limiting barrel, the wedging cavities are located in the limiting barrels, one end of each limiting barrel is provided with an end cover, and a rotation stopping hole is formed in the center of each end cover. According to the anti-skid stud, the anti-rotation columns and the detachable anti-skid sleeves are arranged at the two ends of the stud, the bolt can have a good anti-skid function without using materials with good performance, machining equipment with high precision and complex process steps, and the anti-skid stud is convenient to use. And the use cost of the stud with the anti-thread-slipping function is effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of bolt structures, and in particular to a stud bolt with an anti-slip thread function. Background Art

[0002] Stud bolts are easily loosened from nuts due to vibration. In the existing technology, two thread structures with different rotation directions are opened on the outer side of the bolt, so that the bolt can be matched with two nuts with different rotation directions to achieve a good anti-slip function. However, the double thread requires higher precision, so it is more difficult to process. In addition, the material thickness of the thread wall is thinner than that of ordinary single thread, and better performance materials need to be used for production. Surface hardening treatment is usually required. Therefore, the manufacturing cost of this bolt with built-in anti-slip function is relatively high. Summary of the Invention

[0003] The purpose of the present application is to provide a stud bolt with lower cost and the same anti-slip function.

[0004] To achieve the above purpose, the present application provides a double-headed bolt with an anti-slip thread function: it includes a bolt body, the middle part of the bolt body is an optical axis part, and the two ends of the optical axis part have screw parts, the outside of the screw part is suitable for threaded cooperation with a nut, and each of the screw parts has an end facing away from the optical axis part. The stop column is a regular polygonal column and is inserted with an anti-slip sleeve. The anti-slip sleeve has a fitting cavity, and the anti-slip sleeve is suitable for being sleeved on the outside of the screw part, and the inner wall of the fitting cavity is suitable for fitting with the regular polygonal outer side surface of the nut to limit the relative rotation of the nut.

[0005] As a preference, the anti-slip sleeve includes a limiting cylinder, the fitting cavity is located in the limiting cylinder, one end of the limiting cylinder has an end cover, the center of the end cover is provided with a stop hole, which is suitable for being inserted with the stop column to form a sliding pair, allowing only the anti-slip sleeve to slide but not rotate.

[0006] As a preference, the end face of the end cover located inside the fitting cavity is fixedly connected with a magnetic ring, and the inner diameter of the magnetic ring is larger than the outer diameter of the screw part, ensuring that the magnetic ring can be sleeved outside the screw part, thereby being closer to the nut.

[0007] As a preferred embodiment, the outer side surface of the limiting cylinder has a reinforcing ring, and the outer side surface of the end cover has an outer flared edge, which serves as a portion that contacts and bears force with a pliers tool.

[0008] As a preferred embodiment, the limiting cylinder, reinforcement ring, end cover and outer flared edge are an integrated structure made of plastic, which can reduce the hard contact between the anti-slip sleeve and the bolt body and further reduce the use cost of the stud bolt.

[0009] As a preference, the anti-rotation column is in the shape of a regular quadrangular prism, and the geometric center line of the anti-rotation column is colinear with the axis of the bolt body, so that the bolt body forms a regular structure.

[0010] As a preferred embodiment, the diameter of the circumscribed circle of the cross-section of the anti-rotation column is smaller than the outer diameter of the bolt body, and the outer diameter of the bolt body is larger than the outer diameter of the optical axis part. The nut can be directly put on the optical axis part, which can effectively avoid the loss of the nut during transportation.

[0011] As a preferred embodiment, the optical axis portion, the screw portion and the anti-rotation column are an integrated structure, and are made of corrosion-resistant alloy material together with the nut, thereby ensuring the connection strength and service life of the stud bolt.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] (1) By providing a stop column and a detachable anti-slip sleeve structure at both ends of the stud bolt, the bolt does not need to use high-performance materials, high-precision processing equipment, or more complicated process steps, and the nut can have a good anti-slip function, effectively reducing the cost of using stud bolts with anti-slip wire function;

[0014] (2) After the stud bolt is installed, it has a compact structure and strong stability. The anti-slip cover made of plastic can effectively cover and protect the end of the stud bolt, and the appearance is also better. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the assembly state of the stud bolt with anti-slip thread function.

[0016] Figure 2 For the stud bolt with anti-slip wire function Figure 1 Schematic diagram of the three-dimensional structure after removing one anti-slip cover.

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the nut and bolt body of the stud bolt with anti-slip thread function.

[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the bolt body of the stud bolt with anti-slip thread function.

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the anti-slip sleeve of the stud bolt with anti-slip wire function.

[0020] Figure 6 This is a three-dimensional structural cross-sectional view of the anti-slip sleeve of the stud bolt with anti-slip wire function.

[0021] In the figure: 1. Bolt body; 101. Optical axis; 102. Screw; 103. Anti-rotation column; 2. Nut; 3. Anti-slip sleeve; 301. Limiting cylinder; 302. Reinforcement ring; 303. End cover; 304. Anti-rotation hole; 305. Magnetic ring; 306. Outer expansion edge; 307. Fitting cavity. DETAILED DESCRIPTION

[0022] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, the directions and positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0024] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0025] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units expressly listed, but may include other steps or units not expressly listed or inherent to such process, method, product or apparatus.

[0026] like Figure 1-6 The stud bolt with anti-slip thread function shown in the figure includes a bolt body 1 as the main part, the middle part of the bolt body 1 is the optical axis part 101, most of which is located in the bolt hole after installation, and the two ends of the optical axis part 101 have screw parts 102, and the outer side surface of the screw part 102 has an external thread. The outer surface of the screw part 102 can be threadedly matched with a nut 2 with a corresponding internal thread to achieve a tightening connection.

[0027] Each screw portion 102 also has a stop column 103 at one end facing away from the optical axis portion 101. The stop column 103 is a regular polygonal prism. In this embodiment, the stop column 103 is a regular quadrangular prism with a square cross-section, and the geometric center line of the stop column 103 is collinear with the axis of the bolt body 1. The stop column 103 is externally connected with an anti-slip sleeve 3, which is the main component to realize the anti-slip function.

[0028] The anti-slip sleeve 3 has a fitting cavity 307. After installation, the anti-slip sleeve 3 will be sleeved on the outside of the screw part 102, and the inner wall of the fitting cavity 307 is just in contact with the outer side of the regular polygonal prism of the nut 2. The nut 2 is usually made of a regular hexagonal shape, and the corresponding inner wall of the fitting cavity 307 is also a regular hexagonal prism. The specific structure of the anti-slip sleeve 3 includes a limiting cylinder 301. The outer side of the limiting cylinder 301 has a reinforcing ring 302, which is used to improve the deformation resistance of the side wall of the limiting cylinder 301 on the one hand, and to enhance the friction with the hand on the other hand. The fitting cavity 307 is all located in the limiting cylinder 301, and the limiting One end of the limiting cylinder 301 also has an end cover 303, which only blocks an open end of the limiting cylinder 301. The limiting cylinder 301 still has an open end for the screw portion 102 to pass through. The outer side surface of the end cover 303 has an outer flared edge 306, which serves as the main force-bearing part for plugging and unplugging the anti-slip sleeve 3, making it more convenient for the anti-slip sleeve 3 to be bitten by pliers. A stop hole 304 is provided in the center of the end cover 303. The shape of the stop hole 304 corresponds to the shape of the stop column 103, and is used to be inserted into the stop column 103 to form a sliding pair. The end cover 303 can only slide relative to the stop column 103, but cannot rotate.

[0029] It should be noted that the diameter of the circumscribed circle of the cross section of the stop column 103 needs to be smaller than the outer diameter of the bolt body 1. Under the premise of ensuring that the stop column 103 has sufficient anti-twisting properties, the consumables and the dead weight should be reduced as much as possible to achieve lightness as much as possible. The outer diameter of the bolt body 1, that is, the maximum diameter of the external thread of the bolt body 1 will be larger than the outer diameter of the optical axis part 101. In this way, when the bolt is not installed, the nut 2 can be directly put on the optical axis part 101 and blocked by the screw part 102, thereby avoiding the loss of the nut 2 during the transfer process and facilitating transportation. The optical axis part 101, the screw part 102 and the stop column 103 are an integrated structure, and are all made of the same material as the nut 2. It is made of corrosion-resistant alloy materials, such as common stainless steel. The limiting cylinder 301, reinforcement ring 302, end cover 303 and outer expansion edge 306 are also an integrated structure made of plastic. The plastic used for the anti-slip sleeve 3 has a high hardness after molding and is not easy to deform. The end face of the end cover 303 inside the fitting cavity 307 is fixedly connected with a magnetic ring 305. The magnetic ring 305 is fixed to the inner wall of the anti-slip sleeve 3 by curing glue, so that the anti-slip sleeve 3 can be tightly sucked into the inside of the bolt body 1. This requires the inner diameter of the magnetic ring 305 to be larger than the outer diameter of the screw part 102. After the magnetic ring 305 is sleeved on the outside of the screw part 102, it can be sucked tightly to the end of the nut 2.

[0030] Working principle: When in use, first screw the screw part 102 at one end of the bolt body 1 into a nut 2, and put the anti-slip sleeve 3 on the end. The anti-slip sleeve 3 will automatically move close to the screwed nut 2 and engage with the anti-rotation column 103. Since the anti-slip sleeve 3 is restricted by the anti-rotation column 103 and cannot rotate, the nut 2 located in the anti-slip sleeve 3 is indirectly constrained by the anti-slip sleeve 3 and cannot rotate or loosen; then pass the other end of the bolt body 1 through the corresponding hole of the component to be connected, and then screw another nut 2 on the other end of the bolt body 1, and finally put on the anti-slip sleeve 3 as well. Since the nuts 2 at both ends of the stud bolt are restricted from rotating, they have a good anti-slip function when subjected to axial force.

[0031] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A stud bolt with anti-slip thread function, characterized by: The invention comprises a bolt body (1), wherein the middle part of the bolt body (1) is an optical axis part (101), and both ends of the optical axis part (101) are provided with screw rod parts (102), the outer side of the screw rod part (102) is suitable for threadedly matching with a nut (2), and each end of the screw rod part (102) facing away from the optical axis part (101) is also provided with a stop column (103), the stop column (103) is a regular polygonal prism, and is inserted with an anti-slip sleeve (3), the anti-slip sleeve (3) has a fitting cavity (307), the anti-slip sleeve (3) is suitable for being sleeved outside the screw rod part (102), and the inner wall of the fitting cavity (307) is suitable for fitting with the regular polygonal prism outer side surface of the nut (2).

2. The stud bolt with anti-slip wire function according to claim 1, characterized in that: The anti-slip sleeve (3) includes a limiting cylinder (301), the fitting cavity (307) is located in the limiting cylinder (301), one end of the limiting cylinder (301) is provided with an end cover (303), and a stop hole (304) is provided in the center of the end cover (303), which is suitable for being inserted into the stop column (103) to form a sliding pair.

3. The stud bolt with anti-slip wire function according to claim 2, characterized in that: The end surface of the end cover (303) located inside the fitting cavity (307) is fixedly connected to a magnetic ring (305), and the inner diameter of the magnetic ring (305) is larger than the outer diameter of the screw part (102).

4. The stud bolt with anti-slip wire function according to claim 3, characterized in that: The outer side surface of the limiting cylinder (301) is provided with a reinforcement ring (302), and the outer side surface of the end cover (303) is provided with an outer expansion edge (306).

5. The stud bolt with anti-slip wire function according to claim 4, characterized in that: The limiting cylinder (301), the reinforcing ring (302), the end cover (303) and the outer expansion edge (306) are an integrated structure and are made of plastic.

6. The stud bolt with anti-slip wire function according to any one of claims 1 to 5, characterized in that: The anti-rotation column (103) is in the shape of a regular quadrangular prism, and the geometric center line of the anti-rotation column (103) is colinear with the axis of the bolt body (1).

7. The stud bolt with anti-slip wire function according to claim 6, characterized in that: The diameter of the circumscribed circle of the cross section of the anti-rotation column (103) is smaller than the outer diameter of the bolt body (1), and the outer diameter of the bolt body (1) is larger than the outer diameter of the optical axis portion (101).

8. The stud bolt with anti-slip wire function according to claim 7, characterized in that: The optical axis portion (101), the screw portion (102) and the anti-rotation column (103) are an integrated structure, and are made of corrosion-resistant alloy material along with the nut (2).

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