Anti-loosening bolt

Abstract

The utility model provides an anti-loosening bolt which comprises a screw rod and a bolt head arranged at one end of the screw rod, and is characterized in that an auxiliary screw rod movably connected with the screw rod is arranged at the other end of the screw rod, the thread pitch of the auxiliary screw rod is smaller than that of the screw rod, and the thread direction of the auxiliary screw rod is opposite to that of the screw rod. The auxiliary screw with the thread direction opposite to that of a traditional bolt is additionally arranged at the tail of the traditional bolt to achieve the effect of locking the bolt or a nut on the bolt, and therefore the problem that the bolt or the nut is loosened due to vibration and the like is solved. Meanwhile, the simple structure brings convenience to machining, and the manufacturing cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to a bolt, in particular to an anti-loosening bolt, belonging to the technical field of mechanical design and manufacturing. Background Art

[0002] A bolt is a cylindrical fastener with threads, also often called a screw. Traditional bolts are made of metal as a whole, and are usually directly threaded with nuts or parts to lock them during use. However, during use, bolts and nuts, bolts and screw holes often become loose due to mechanical or part vibrations. This not only poses a serious safety hazard to equipment or buildings, but also causes damage to the connecting parts and the bolts themselves. At present, the anti-loosening bolts used on the market have a relatively complex structure, which brings inconvenience to the production, processing, assembly and use of the bolts, and also increases their manufacturing costs. Therefore, it is necessary to improve the existing technology. Summary of the invention

[0003] In order to solve the problem that the existing bolts are prone to loosening due to mechanical or parts vibration during long-term use, the utility model provides an anti-loosening bolt.

[0004] The utility model is completed through the following technical scheme: an anti-loosening bolt, including a screw rod and a bolt head arranged at one end of the screw rod, characterized in that a secondary screw rod movably connected to the screw rod is arranged at the other end of the screw rod, the pitch of the secondary screw rod is smaller than the pitch of the screw rod, and the thread direction of the secondary screw rod is opposite to the thread direction of the screw rod. When looseness occurs between the screw rod and the screw hole or the nut, the secondary screw rod or the nut on the secondary screw rod can effectively prevent the screw rod from continuing to loosen, thereby playing a role in preventing loosening and disassembly.

[0005] The screw is set as a long screw, and its length and diameter are set to various types according to connection requirements. The bolt head is set at the rear end of the screw, and a short screw connected to the auxiliary screw is provided on the end face of the front end of the screw. The diameter of the short screw is smaller than the diameter of the screw, and the thread direction is opposite to the thread direction of the screw. The bolt head is set as a polygonal bolt head or a bolt head with a wrench socket thereon, so as to prevent the auxiliary screw and the screw threaded thereon from loosening through the short screw set in the opposite direction of the thread to the screw.

[0006] The auxiliary screw is set as a short screw, and its length can be set to various types according to needs. Its diameter is consistent with the diameter of the screw. A screw hole matching the short screw is provided on the end face of the inner end of the auxiliary screw, and a wrench socket is provided on the end face of the outer end of the auxiliary screw, so that the auxiliary screw and the screw can be movably connected by screw connection. After the bolt is screwed into the required connection position, the auxiliary screw is screwed to the short screw of the screw. When looseness occurs between the screw and the screw hole or the nut, the auxiliary screw or the nut on the auxiliary screw can effectively prevent the screw from continuing to loosen, thereby playing a role in preventing loosening and disassembly.

[0007] The utility model has the following advantages and effects: adopting the above scheme, by adding a secondary screw rod with a thread direction opposite to that of the traditional bolt at the tail end, the bolt or the nut on the bolt is locked, thereby preventing the bolt or nut from loosening due to vibration and other reasons. At the same time, the simple structure also brings convenience to processing and effectively reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a structural exploded view of the utility model;

[0009] Figure 2 It is a structural combination diagram of the utility model;

[0010] Figure 3 This is a structural diagram of the auxiliary screw of the utility model. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0012] The anti-loosening bolt provided by the utility model comprises a screw rod 2, a bolt head 1 arranged at one end of the screw rod 2, and a secondary screw rod 4 movably connected to the screw rod 2 at the other end. The pitch of the secondary screw rod 4 is smaller than the pitch of the screw rod 2, and the thread direction of the secondary screw rod 4 is opposite to the thread direction of the screw rod 2. When the screw rod 2 and the screw hole or the nut are loose, the secondary screw rod 4 or the nut on the secondary screw rod 4 can effectively prevent the screw rod from further loosening, thereby playing the role of anti-loosening.

[0013] The screw rod 2 is set as a long screw rod, and its length and diameter are set to various according to the connection requirements. The bolt head 1 is set at the rear end of the screw rod 2. A short screw rod 3 connected to the auxiliary screw rod 4 is set on the end surface of the front end of the screw rod 2. The diameter of the short screw rod 3 is smaller than the diameter of the screw rod 2, and the thread direction is opposite to the thread direction of the screw rod 2. The bolt head 1 is set as a polygonal bolt head, so that the auxiliary screw rod 4 and the screw rod 2 screwed thereon can be prevented from loosening by the short screw rod 3 set in the opposite direction to the screw rod 2 through the thread.

[0014] The auxiliary screw 4 is set to be a short screw, and its length can be set to various types according to needs. Its diameter is consistent with the diameter of the screw 2. A screw hole 41 matching the short screw 3 is provided on the end face of the inner end of the auxiliary screw 4, and a wrench socket 42 is provided on the end face of the outer end of the auxiliary screw 4, so that the auxiliary screw 4 and the screw 2 can be movably connected by screw connection. After the bolt 2 is first screwed into the required connection position, the auxiliary screw 4 is screwed to the short screw 3 of the screw 2. When looseness occurs between the screw 2 and the screw hole or the nut, the auxiliary screw 4 or the nut on the auxiliary screw 4 can effectively prevent the screw 2 from continuing to loosen, thereby playing a role in preventing loosening and disassembly.

[0015] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0016] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An anti-loosening bolt, comprising a screw rod and a bolt head disposed at one end of the screw rod, characterized in that The other end of the screw is provided with a secondary screw movably connected thereto, the pitch of the secondary screw is smaller than the pitch of the screw, and the thread direction of the secondary screw is opposite to that of the screw.

2. The anti-loosening bolt according to claim 1, characterized in that The screw is set as a long screw, and its length and diameter are set to various types according to connection requirements. The bolt head is set at the rear end of the screw, and a short screw connected to the auxiliary screw is provided on the end face of the front end of the screw. The diameter of the short screw is smaller than the diameter of the screw, and the thread direction is opposite to the thread direction of the screw. The bolt head is set as a polygonal bolt head or a bolt head with a wrench socket thereon.

3. The anti-loosening bolt according to claim 1, characterized in that The auxiliary screw is set as a short screw, and its length can be set to various types according to needs. Its diameter is consistent with the diameter of the screw. A screw hole matching the short screw is provided on the end face of the inner end of the auxiliary screw, and a wrench socket is provided on the end face of the outer end of the auxiliary screw.

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