Anti-falling bolt
The combined design of the center rod, screw, nut and baffle solves the problem of bolt loosening and falling off, and achieves stable connection and anti-loosening effect in vibration environment.
Patent Information
- Application Number
- CN202520163473.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-01-24
AI Technical Summary
Existing bolts are prone to loosening and falling off after long-term use, causing equipment parts to lose connection, increasing maintenance costs and downtime.
The design employs a combination of a central rod, a first screw, a second screw, a nut, and a baffle. The baffle provides a physical barrier, the circular cut portion allows for normal engagement, and the eccentric cut portion increases friction, forming a double anti-loosening mechanism.
It effectively prevents bolts from loosening and falling off under vibration or impact, improves the load-bearing capacity and fatigue resistance of threaded connections, and ensures stable operation of equipment.
Smart Images
Figure CN223578468U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of support bolt, specifically relates to a kind of anti-falling bolt. BACKGROUND
[0002] Bolt is a common fastener, consisting of head and screw rod two parts, need to cooperate with nut, for fastening connection two parts with through hole. Its emergence and development, it is one of important signs of human industrial civilization progress. Bolt is rich in variety and specification, is widely used in building, automobile, aerospace, electronics and other fields. In the field of construction, high-strength bolt is used to connect steel structure, ensure the stability of building;In automobile manufacturing, various bolts will engine, chassis and many other parts closely connected, guarantee the driving safety of car;In aerospace field, high-precision, high-performance bolt is indispensable, they connect the key components of aircraft, bear huge flight load. It can be said that the development of bolt is closely linked with the progress of society, it is like a small but strong link, each component of modern society is closely linked together, support the efficient operation and development of human society.
[0003] In industrial environment, vibration and impact of mechanical equipment can have a huge impact on bolt, leading to loosening or even breaking. Vibration will cause relative slip of thread at contact surface, causing gap or loosening, so that the fastening force of bolt becomes unstable, even directly falls off. Bolt falling off will lead to the loss of connection between parts of equipment, so that equipment cannot operate normally, even cause damage to equipment, increase maintenance cost and downtime
[0004] In summary, the existing bolt is prone to loosening and falling off after long-term use. UTILITY MODEL CONTENT
[0005] Therefore, the utility model provides a kind of anti-falling bolt, can solve the problem of existing bolt that is prone to loosening and falling off after long-term use.
[0006] The utility model is realized as follows:
[0007] The utility model provides a kind of anti-falling bolt, wherein, including center pole, first screw rod, second screw rod, nut and baffle, the center pole is slender cylindrical structure, the left and right ends of the center pole are respectively fixedly connected with the first screw rod and second screw rod, the outside of the first screw rod and second screw rod is all machined with external thread, the first screw rod and the second screw rod are all adapted with the nut, the nut includes first nut part, second nut part and inner drill hole, the inside of the inner drill hole of the first nut part and the inner drill hole of the second nut part is all provided with internal thread, the inner drill hole of the first nut part is normal circle cutting, the inner drill hole of the second nut part is eccentric cutting, the number of the baffle is two, the baffle is sleeved on the center pole.
[0008] The technical effect of the anti-falling bolt provided by the utility model is as follows: 1. The main function of the baffle is to provide a physical barrier to prevent the bolt from sliding out or falling off vertically. Even if the nut is loose, the bolt will not completely separate from the connection due to gravity or slight vibration. This design provides an additional safety layer, which can effectively prevent accidental bolt falling, especially in the presence of vibration.
[0009] 2. The normal circle cutting part allows the nut to normally engage with the bolt thread during tightening, providing basic tightening force. The eccentric cutting part forms additional friction or locking force with the bolt thread after tightening. This design: the eccentric part causes the contact surface between the nut and the bolt to be uneven, thereby increasing the friction resistance and resisting the loosening of the nut under vibration or impact. The eccentric design may cause the nut to slightly interfere with the bolt thread when rotated in the opposite direction, thereby providing additional locking force to prevent loosening. The combination of normal tightening of the normal circle and the loosening prevention function of the eccentric forms a double loosening prevention mechanism. This is more effective than a single loosening prevention method, especially in high-vibration or impact environments.
[0010] On the basis of the above technical scheme, the anti-falling bolt of the utility model can be further improved as follows:
[0011] Among them, the diameter of the first screw rod and the second screw rod is greater than the diameter of the center pole.
[0012] Further, the diameter of the through hole on the baffle is greater than the diameter of the first screw rod and the second screw rod.
[0013] Further, the center pole is provided with anti-slip lines, and the anti-slip lines are sawtooth structures.
[0014] Further, the center pole is provided with a scale, and the scale takes the center point of the center pole as the zero point and extends to both sides.
[0015] The beneficial effect of the improved scheme is that the scale provides a visual standardization method, which is convenient for the staff to observe the installation position of the bolt.
[0016] Further, the first screw rod and the second screw rod are subjected to corrosion prevention treatment by galvanizing.
[0017] The beneficial effect of the improved scheme is that the corrosion prevention treatment can improve the corrosion resistance and prolong the service life.
[0018] Further, the central rod is made of high-strength alloy steel.
[0019] The beneficial effect of the improved scheme is that the high-strength alloy steel ensures that it has sufficient tensile strength and shear strength.
[0020] Further, the first screw rod and the second screw rod are made of high-strength alloy steel.
[0021] Further, the baffle is of a circular structure and is made of transparent acrylic.
[0022] Further, the nut is a hexagonal nut.
[0023] Compared with the prior art, the anti-falling bolt provided by the utility model has the beneficial effects that: 1. The main function of the baffle is to provide a physical barrier to prevent the bolt from directly sliding out or falling off in the vertical direction. Even if the nut is loose, the bolt will not completely separate from the connection due to gravity or slight vibration. This design provides an additional safety layer, which can effectively prevent accidental bolt falling, especially in the presence of vibration.
[0024] 2. The circular cutting part allows the nut to normally engage with the bolt thread during tightening, providing basic tightening force. The eccentric cutting part forms additional friction or locking force with the bolt thread after tightening. This design: the eccentric part causes the contact surface between the nut and the bolt to be uneven, thereby increasing the friction resistance and resisting the loosening of the nut under vibration or impact. The eccentric design may cause the nut to slightly interfere with the bolt thread when rotated in the opposite direction, thereby providing additional locking force to prevent loosening. The combination of the normal tightening of the circle and the anti-loosening function of the eccentricity forms a double anti-loosening mechanism. This is more effective than a single anti-loosening method, especially in high-vibration or impact environments. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the utility model. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0026] Fig. 1 is a front view of a falling-off-preventing bolt;
[0027] Fig. 2 is a schematic view of the internal structure of a nut of a falling-off-preventing bolt;
[0028] In the drawings, the components represented by the respective reference numerals are listed as follows:
[0029] 10, central rod; 20, first screw rod; 30, second screw rod; 40, nut; 41, first nut part; 42, second nut part; 43, internal drill hole; 50, baffle. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.
[0031] As shown in Figs. 1-2 the embodiment of the falling-off-preventing bolt provided by the present application, in the embodiment, a central rod 10, a first screw rod 20, a second screw rod 30, a nut 40 and a baffle 50 are included, the central rod 10 is in an elongated cylindrical structure, the left and right ends of the central rod 10 are fixedly connected with the first screw rod 20 and the second screw rod 30 respectively, the outer sides of the first screw rod 20 and the second screw rod 30 are both machined with external threads, the first screw rod 20 and the second screw rod 30 are both adapted to the nut 40, the nut 40 includes a first nut part 41, a second nut part 42 and an internal drill hole 43, the internal drill holes 43 of the first nut part 41 and the second nut part 42 are both provided with internal threads inside, the internal drill hole 43 of the first nut part 41 is a perfect circle cut, the internal drill hole 43 of the second nut part 42 is an eccentric cut, the number of the baffles 50 is two, and the baffles 50 are sleeved on the central rod 10.
[0032] In the above technical scheme, the diameters of the first screw rod 20 and the second screw rod 30 are greater than the diameter of the central rod 10.
[0033] Further, in the above technical scheme, the diameters of the through holes on the baffles 50 are greater than the diameters of the first screw rod 20 and the second screw rod 30.
[0034] Further, in the above technical scheme, the central rod 10 is provided with anti-skid lines, and the anti-skid lines are in a sawtooth structure.
[0035] Further, in the above technical scheme, the central rod 10 is provided with a scale, and the scale takes the center point of the central rod 10 as a zero point and extends and increases to both sides.
[0036] Further, in the above technical solution, the first screw rod 20 and the second screw rod 30 are subjected to anti-corrosion treatment by galvanizing.
[0037] Further, in the above technical solution, the central rod 10 is made of high-strength alloy steel.
[0038] Further, in the above technical solution, the first screw rod 20 and the second screw rod 30 are made of high-strength alloy steel.
[0039] Further, in the above technical solution, the baffle 50 is of a circular structure and is made of transparent acrylic.
[0040] Further, in the above technical solution, the nut 40 is a hexagonal nut.
[0041] In use, it is determined according to actual needs whether the baffle 50 needs to be installed, and if not, the baffle 50 is removed, and if so, the number of baffles 50 to be installed is selected according to the situation.
[0042] The thread of the true circle cutting nut is cut according to the standard circular thread during processing, and such a thread shape makes the contact area between the nut and the bolt thread larger and the stress more uniform. In the tightening process, a larger pre-tightening force can be generated, so that the nut and the bolt are tightly combined to form a stable connection. Such uniform stress distribution helps to improve the load-carrying capacity and fatigue resistance of the threaded connection, so that the bolt can still maintain a good connection state under the action of a larger load or repeated load, reducing the possibility of loosening and falling off.
[0043] The processing method of the eccentric cutting nut makes the thread center and the geometric center of the nut have a certain eccentricity. When the eccentric cutting nut is tightened, due to the eccentric structure, a lateral force will be generated on the bolt thread. This lateral force will generate greater friction and engagement force between the nut and the bolt thread, thereby achieving better locking effect. Specifically, after the eccentric nut is tightened, the eccentric part will cause the contact points between the nut and the bolt thread to displace, and such displacement will increase the contact pressure between the threads, thereby increasing the friction force, effectively preventing the nut from loosening under adverse working conditions such as vibration or impact, and thereby avoiding the bolt from falling off.
[0044] Specifically, the principle of the utility model is that in use, it is determined according to actual needs whether the baffle 50 needs to be installed, and if not, the baffle 50 is removed, and if so, the number of baffles 50 to be installed is selected according to the situation.
[0045] The thread of the concentric cutting nut is cut according to the standard circular thread during processing, and the thread shape makes the contact area between the nut and the bolt thread larger and the stress more uniform. During tightening, a larger pre-tightening force can be generated, so that the nut and the bolt are tightly combined and a stable connection is formed. The uniform stress distribution helps to improve the load-carrying capacity and fatigue resistance of the threaded connection, so that the bolt can maintain a good connection state under the action of a larger load or repeated load, and the possibility of loosening and falling off is reduced.
[0046] The processing method of the eccentric cutting nut makes the thread center and the geometric center of the nut have a certain eccentricity. When the eccentric cutting nut is tightened, a lateral force will be generated on the bolt thread due to the eccentric structure. This lateral force will generate greater friction and engagement force between the nut and the bolt thread, thereby achieving better locking effect. Specifically, after the eccentric nut is tightened, the eccentric part will cause the contact points between the nut and the bolt thread to displace, and this displacement will increase the contact pressure between the threads, thereby increasing the friction force, effectively preventing the nut from loosening under harsh working conditions such as vibration or impact, and thereby avoiding the bolt from falling off.
[0047] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A non-come-undone bolt characterized by, The utility model provides a center rod (10), first screw rod (20), second screw rod (30), nut (40) and baffle (50) are included, the center rod (10) is the slender cylindrical structure, the left and right ends of center rod (10) are fixedly connected with first screw rod (20) and second screw rod (30) respectively, and the outer side of first screw rod (20) and second screw rod (30) is all processed with external thread, and first screw rod (20) and second screw rod (30) are all adapted with nut (40), and nut (40) includes first nut part (41), second nut part (42) and inner drill hole (43), the inner drill hole (43) of first nut part (41) and the inside of inner drill hole (43) of second nut part (42) are all provided with internal thread, the inner drill hole (43) of first nut part (41) is right circular cutting, and the inner drill hole (43) of second nut part (42) is eccentric cutting, and the number of baffle (50) is two, and baffle (50) is sleeved on center rod (10).
2. The anti-loosening bolt according to claim 1, wherein The diameter of the first screw rod (20) and the second screw rod (30) is greater than the diameter of the center rod (10).
3. The anti-backout bolt of claim 2, wherein, The diameter of the through hole on the baffle (50) is greater than the diameter of the first screw rod (20) and the second screw rod (30).
4. The anti-backout bolt of claim 3, wherein The center rod (10) is provided with anti-skid lines, which are sawtooth structures.
5. The anti-backout bolt of claim 4, wherein, The center rod (10) is provided with a scale, which takes the center point of the center rod (10) as the zero point and extends to both sides.
6. The anti-backout bolt of claim 5, wherein, The first screw rod (20) and the second screw rod (30) are treated with zinc plating for corrosion prevention.
7. The anti-backout bolt of claim 6, wherein, The center rod (10) is made of high-strength alloy steel.
8. The anti-backout bolt of claim 7, wherein, The first screw rod (20) and the second screw rod (30) are made of high-strength alloy steel.
9. The anti-backout bolt of claim 8, wherein, The baffle (50) is a circular structure made of transparent acrylic.
10. The anti-backout bolt of claim 9, wherein, The nut (40) is a hexagonal nut.