阅读说明：本技术 一种防松脱、便于开合的螺纹紧固组件及连接结构 (Locking take off, be convenient for open and shut screw fastening subassembly and connection structure ) 是由 卢玉珊 于 2019-10-18 设计创作，主要内容包括：本发明公开一种防松脱、便于开合的螺纹紧固组件,其包括螺钉、前螺母及后螺母,螺钉包括螺钉头及螺杆；螺杆包括螺杆前段及螺杆后段,螺杆前段的前端与螺钉头相连,螺杆前段的后端与螺杆后段的前端相连；螺杆前段上设有第一螺纹,第一螺纹从螺杆前段的后端向前延伸,螺杆后段上开设有与第一螺纹的旋向相反的第二螺纹,第二螺纹从螺杆后段的后端向前延伸至其前端；前螺母上开设有与第一螺纹啮合的第一内螺纹,后螺母上开设有与第二螺纹啮合的第二内螺纹,前螺母套设于螺杆前段,后螺母套设于螺杆后段,且前螺母的后端与后螺母的前端相卡合。本发明的有益效果为：能够防止螺母回松脱落,保证锁紧效果,且便于开合。(The invention discloses a thread fastening component which is anti-loosening and convenient to open and close, and comprises a screw, a front nut and a rear nut, wherein the screw comprises a screw head and a screw rod; the screw comprises a screw front section and a screw rear section, the front end of the screw front section is connected with the screw head, and the rear end of the screw front section is connected with the front end of the screw rear section; the front section of the screw is provided with a first thread, the first thread extends forwards from the rear end of the front section of the screw, the rear section of the screw is provided with a second thread with the opposite rotation direction to the first thread, and the second thread extends forwards from the rear end of the rear section of the screw to the front end of the rear section of the screw; the front nut is provided with a first internal thread meshed with the first thread, the rear nut is provided with a second internal thread meshed with the second thread, the front nut is sleeved on the front section of the screw rod, the rear nut is sleeved on the rear section of the screw rod, and the rear end of the front nut is clamped with the front end of the rear nut. The invention has the beneficial effects that: the locking nut can be prevented from loosening and falling off, the locking effect is guaranteed, and opening and closing are facilitated.)

1. The screw fastening assembly is characterized by comprising a screw, a front nut and a rear nut, wherein the screw comprises a screw head and a screw rod;

the screw comprises a screw front section and a screw rear section, the front end of the screw front section is connected with the screw head, and the rear end of the screw front section is connected with the front end of the screw rear section;

the front section of the screw is provided with a first thread, the first thread extends forwards from the rear end of the front section of the screw, the rear section of the screw is provided with a second thread with the opposite rotation direction to the first thread, and the second thread extends forwards from the rear end of the rear section of the screw to the front end of the rear section of the screw;

the front nut is provided with a first internal thread meshed with the first thread, the rear nut is provided with a second internal thread meshed with the second thread, the front nut is sleeved on the front section of the screw rod, the rear nut is sleeved on the rear section of the screw rod, and the rear end of the front nut is clamped with the front end of the rear nut.

2. The anti-loosening threaded fastener assembly facilitating opening and closing of claim 1 wherein the front section of the screw is of the same outside diameter as the rear section of the screw;

the first thread extends rearwardly at a rear end of the rear section of the screw.

3. The anti-loosening threaded fastener assembly facilitating opening and closing of claim 1 wherein the outer diameter of the front screw section is larger than the outer diameter of the rear screw section so that a step is formed at the junction of the front screw section and the rear screw section.

4. The assembly of any one of claims 1-3, further comprising a spring washer disposed on the front section of the screw and located in front of the front nut.

5. The anti-loosening, easy-to-open threaded fastener assembly of claim 4 wherein the spring washer is a belleville spring.

6. The assembly of claim 4 further comprising a backup nut engaging over the front section of the threaded rod and located in front of the spring washer.

7. The anti-loosening threaded fastener assembly facilitating opening and closing according to any one of claims 1 to 3, wherein the front nut and the rear nut are engaged with each other through a locking block and a groove which are engaged with each other.

8. The assembly of claim 7, wherein the rear end of the front nut and the front end of the rear nut are both saw-toothed, the saw-toothed comprises a plurality of saw teeth, the saw teeth form the block, and the groove is defined between two adjacent saw teeth.

9. The anti-loosening, easy-to-open threaded fastener assembly of claim 8 wherein the serrations are rectangular or triangular or trapezoidal in shape.

10. The anti-loosening threaded fastener assembly facilitating opening and closing of any of claims 1-3, wherein the first thread has a right-hand thread direction and the second thread has a left-hand thread direction.

11. A connecting structure, which comprises a first fastened piece, a second fastened piece and the anti-loosening and easy-opening and closing screw fastening assembly as claimed in any one of claims 1-10;

the first fastened piece and the second fastened piece are sequentially sleeved on the front section of the screw rod, and the front nut and the rear nut fasten and connect the first fastened piece and the second fastened piece.

Technical Field

The invention relates to a screw fastening assembly with looseness prevention and convenience for opening and closing and a connecting structure comprising the screw fastening assembly.

Background

The most common nut locking method in industry, building and transportation industry today relies on energy storage by friction and deformation of the nut. This is a practical, convenient and inexpensive method of fastening components because friction is not present and the amount of nut deformation is greater than that of screws and washers. The powerful reaction is the strain, the energy is stored only when the strain exists, and the existence of the axial force of the nut is ensured only when the energy is stored; energy storage is a long-lasting maintenance relying on friction. The energy stored to prevent loosening of the nut is primarily potential energy.

In the current threaded fastening assembly, under severe conditions of severe vibration, the nut is difficult to loosen; particularly, under the high-frequency vibration of some large-axial-force nuts, the nuts can be loosened and fall off within a few minutes; and when a large axial force is required, the nut is troublesome to screw and disassemble.

Disclosure of Invention

The purpose of the invention is: overcome prior art's not enough, provide one kind and can prevent that the nut from getting back the pine and coming off, and do benefit to the screw fastening subassembly of installation and dismantlement.

In order to achieve the above object, a first aspect of the present invention provides a screw fastening assembly for preventing loosening and facilitating opening and closing, comprising a screw, a front nut and a rear nut, wherein the screw comprises a screw head and a screw rod;

the screw comprises a screw front section and a screw rear section, the front end of the screw front section is connected with the screw head, and the rear end of the screw front section is connected with the front end of the screw rear section;

the front section of the screw is provided with a first thread, the first thread extends forwards from the rear end of the front section of the screw, the rear section of the screw is provided with a second thread with the opposite rotation direction to the first thread, and the second thread extends forwards from the rear end of the rear section of the screw to the front end of the rear section of the screw;

the front nut is provided with a first internal thread meshed with the first thread, the rear nut is provided with a second internal thread meshed with the second thread, the front nut is sleeved on the front section of the screw rod, the rear nut is sleeved on the rear section of the screw rod, and the rear end of the front nut is clamped with the front end of the rear nut.

Preferably, the outer diameters of the front section and the rear section of the screw are equal;

the first thread extends rearwardly at a rear end of the rear section of the screw.

Preferably, the outer diameter of the front screw section is larger than that of the rear screw section, so that a step is formed at the joint of the front screw section and the rear screw section.

Preferably, the screw fastening assembly further comprises a spring washer sleeved on the front section of the screw and located in front of the front nut.

Preferably, the spring washer is a disc spring.

Preferably, the threaded fastening assembly further comprises a spare nut which is engaged and sleeved on the front section of the screw rod and is positioned in front of the spring washer.

Preferably, the front nut and the rear nut are engaged with each other through a mutually matched clamping block and a groove.

Preferably, the rear end of the front nut and the front end of the rear nut are both in a sawtooth structure, the sawtooth structure comprises a plurality of sawteeth, the sawteeth form the clamping block, and the groove is defined between every two adjacent sawteeth.

Preferably, the saw teeth are rectangular or triangular or trapezoidal.

Preferably, the direction of rotation of the first thread is right-hand rotation, and the direction of rotation of the second thread is left-hand rotation.

The same object is achieved by a second aspect of the present invention, which further provides a connecting structure, comprising a first fastened member, a second fastened member, and the anti-loosening and easy-to-open threaded fastening assembly according to any one of the first aspect;

the first fastened piece and the second fastened piece are sequentially sleeved on the front section of the screw rod, and the front nut and the rear nut fasten and connect the first fastened piece and the second fastened piece.

Compared with the prior art, the screw thread fastening component provided by the embodiment of the invention has the beneficial effects that:

according to the threaded fastener, the first threads and the second threads with opposite rotation directions are arranged on the screw rod, the front nut and the rear nut are clamped with each other, when the front nut is loosened under the vibration working condition, the rear nut clamped with the front nut is driven to rotate along with the front nut, and due to the fact that the rotation directions of the rear nut and the front nut are opposite, the rear nut is not loosened but not loosened, the front nut is subjected to head-on collision instead, the front nut is locked more tightly, and loosening of the nut after vibration is effectively prevented; in addition, because the front nut and the rear nut are adopted and are oppositely screwed and mutually clamped, a mutual braking effect is generated, and compared with the conventional nut, the novel nut is only required to be screwed to generate smaller axial force to ensure a better fastening effect so as to prevent loosening and facilitate opening and closing.

Drawings

FIG. 1 is a schematic structural diagram of a screw fastening assembly for preventing loosening and facilitating opening and closing according to one embodiment of the present invention;

fig. 2 is a schematic structural diagram of another anti-loosening threaded fastening assembly facilitating opening and closing according to the first embodiment of the present invention.

In the drawings, 1, screw; 11. a screw head; 12. a screw; 121. a screw front section; 122. a rear section of the screw; 2. a front nut; 21. a clamping block; 22. a groove; 3. a back nut; 4. a spring washer; 5. a first fastened member; 6. a second fastened piece; 7. and (5) standby nuts are used.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

In addition, the terms "forward" and "rearward" in the present invention mean that the end close to the screw head is "forward" and the end away from the screw head is "rearward".