A non-loose bolt and nut structure
By introducing a locking device into the bolt and nut structure, the loosening problem caused by vibration is solved, and the nut is kept in place in a vibrating environment to maintain a stable connection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 郝志江
- Filing Date
- 2025-06-16
- Publication Date
- 2026-07-31
AI Technical Summary
In a vibrating environment, existing bolt and nut structures are prone to loosening due to vibration, leading to fixation failure.
A locking device is adopted, including a locking nut, a locking clamp, a lower blocking ring, an upper blocking ring, and a shock-absorbing ring. Through thread matching and connection, a mutually restrictive structure is formed to prevent the nut from loosening during vibration.
In a vibrating environment, the nut structure can remain fixed, ensuring that the fixing effect remains unchanged and preventing loosening.
Smart Images
Figure CN224579620U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a bolt and nut structure that will not loosen, and in particular, a bolt and nut structure that will not loosen in a vibrating environment, where the nut will automatically loosen under the influence of vibration. Background Technology
[0002] Currently, it is known that in vibrating environments, bolts and nuts will loosen automatically under vibration. To prevent this, double-nut bolt and nut structures are used. However, when the two nuts have the same internal thread direction, both nuts may loosen automatically under vibration. When the two nuts have opposite internal thread directions, if vibration loosens the upper nut, it will also loosen automatically, causing the upper and lower nuts to separate and lose their function as a double-nut structure. If vibration loosens the lower nut, it will loosen automatically without the restraint of the upper nut. These problems render the double-nut bolt and nut structure ineffective in securing the object. Summary of the Invention
[0003] The technical problem to be solved by this utility model is to provide a locking device between nuts when people use a bolt and nut structure that will not loosen, which solves the problem of nuts automatically loosening under the influence of vibration, and has wide applicability.
[0004] The above-mentioned technical problem of this utility model is solved by providing a bolt and nut structure that will not loosen. The bolt and nut structure includes a fixing bolt and a fixing nut. The fixing bolt passes through the connection hole of the object to be fixed. One end of the fixing nut is tightened on the fixing bolt while in contact with the upper end of the connection hole of the object to be fixed. The bolt and nut structure also includes a locking device to prevent the fixing nut from automatically loosening under the influence of vibration.
[0005] The locking device can consist of a locking nut, a locking clamp, a lower blocking ring, an upper blocking ring, a locking thread, and a shock-absorbing ring. The locking thread is located on the outer wall of the end of the fixing nut that is not in contact with the object to be fixed. One end of the locking nut is tightened onto the fixing bolt while in contact with the fixing nut. The lower blocking ring is positioned within one-quarter of the length of the locking nut at the end where it contacts the fixing nut. The lower blocking ring is connected to the outer wall of the locking nut at the selected position through a hole in its center. The locking clamp is fitted onto the locking nut above the lower stop ring through a hole at the center of the clamp surface. With the clamp surface in contact with the lower stop ring, the locking clamp is tightened onto the fixed nut through the locking thread on the outer wall of the end of the fixed nut that contacts the locking nut. The upper stop ring is located halfway up the length of the locking nut above the locking clamp, and is connected to the outer wall of the locking nut through a hole at its center. The shock-absorbing ring is fitted onto the portion of the outer wall of the locking nut located between the upper stop ring and the locking clamp.
[0006] The fixing bolt can be a hexagonal bolt made of commonly used materials, with a certain diameter and length, and having both left-hand and right-hand external threads of appropriate lengths.
[0007] The fixing nut can have the shape of its outer wall at both ends. One end has the shape of a normal nut outer wall with a moderate length, and the remaining outer wall shape at the other end is circular. The outer diameter of the nut at the circular end can be slightly smaller than the outer diameter of the nut at the end with the normal nut outer wall shape. It is a right-handed nut or a left-handed nut with a locking thread of a moderate length on the circular outer wall of the nut.
[0008] The locking nut can be a nut whose internal thread direction is exactly opposite to that of the fixing nut. If the fixing nut is a right-handed nut, then the locking nut is a left-handed nut, and vice versa. The internal thread direction of the locking nut is determined by the internal thread direction of the fixing nut, which is the reference for determining the internal thread direction of the locking nut.
[0009] The upper barrier ring can be a circle with a certain strength made of a commonly used material, and the diameter of the hole in the center of the circle, the outer diameter, the width and thickness of the ring edge are all appropriate.
[0010] The lower barrier ring can be a circle with a certain strength made of a commonly used material, and the diameter of the hole in the center of the circle, the outer diameter, the width and thickness of the ring edge are all appropriate.
[0011] The locking clamp can be composed of a clamp face and a clamp wall, and the material used is a commonly used material. The clamp face and clamp wall are perpendicular to each other, and both have a certain thickness and strength. The diameter of the locking clamp is appropriate and matches the locking thread. The direction of the internal thread on the inner wall of the clamp wall is consistent with the direction of the internal thread of the fixing nut. The direction of the internal thread on the inner wall of the clamp wall is determined according to the direction of the internal thread of the fixing nut. The thread direction of the fixing nut is the reference for determining the direction of the internal thread on the inner wall of the clamp wall. There is a hole of appropriate diameter at the center of the clamp face.
[0012] The locking thread can be located on the outer wall of one end of the fixed nut that is circular in shape. The external thread direction of the locking thread is consistent with the internal thread direction of the fixed nut. The external thread direction of the locking thread is determined according to the internal thread direction of the fixed nut. The internal thread direction of the fixed nut is the reference for determining the external thread direction of the locking thread. The length of the locking thread is appropriate.
[0013] The shock absorber ring can be a solid ring with a certain degree of elasticity, made of rubber or other commonly used materials, with suitable inner diameter, outer diameter, self-diameter, and elasticity. Attached Figure Description
[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0015] Figure 1 This is a top view of the present invention.
[0016] Figure 2 This is the left view of this utility model.
[0017] Figure 3 This is a cross-sectional view of the AA line of this utility model. Detailed Implementation
[0018] Figure 1 , Figure 2 , Figure 3This invention illustrates a bolt and nut structure embodiment that prevents loosening. First, the fixing bolt 1 passes through the first connecting hole 10 of the first object to be fixed 9 and the second connecting hole 12 of the second object to be fixed 11, assembling the fixing bolt 1 into both holes. Since the fixing bolt 1 has both right-hand and left-hand external threads of appropriate length, the fixing nut 2 can be either a right-hand nut or a left-hand nut. Here, we will only illustrate this using a right-hand nut 2 as an example. First, a right-hand locking thread 7 of appropriate length is machined on the circular end of the outer wall of the fixing nut 2 using a lathe (or other commonly used methods). Then, the part of the outer wall of the fixing nut 2 without the locking thread 7... One end is turned clockwise on the upper end of the fixing bolt 1. When the fixing nut 2 is turned clockwise until it contacts the upper end of the second connecting hole 12 of the second required fixing object 11, the fixing nut 2 is tightened clockwise on the fixing bolt 1 with a tool, thereby assembling the fixing nut 2 on the fixing bolt 1 and pressing the fixing nut 2 tightly against the upper end of the second connecting hole 12 of the second required fixing object 11, firmly fixing the first required fixing object 9 and the second required fixing object 11 together. Then, in the first step, the lower blocking ring 6 is passed through the hole on its own center part and a position is selected within one-quarter of the length of the locking nut 3 at one end. The lower blocking ring 6 is then placed on the locking nut 3 at the selected position, and the lower blocking ring 6 is welded (or using other conventional methods) at this position. (Using the connection method) On the outer wall of the locking nut 3, the second step is to place the locking clamp 4 with its opening facing the lower blocking ring 6, through the hole at the center of the clamp surface, and put the locking clamp 4 on the locking nut 3 above the lower blocking ring 6 from the other end of the locking nut 3. Because the diameter of the hole at the center of the clamp surface of the locking clamp 4 is slightly larger than the outer diameter of the locking nut 3 and slightly smaller than the outer diameter of the lower blocking ring 6, the locking clamp 4 can flexibly rotate left and right and move up and down around the locking nut 3 above the lower blocking ring 6. The third step is to put the upper blocking ring 5 through the hole at its center, at a position half the length of the locking nut 3 above the locking clamp 4, on the locking nut 3. Here, the upper stop ring 5 is welded (or connected using other conventional connection methods) to the outer wall of the locking nut 3. Because the diameter of the hole at the center of the locking clamp 4 is slightly smaller than the outer diameter of the upper stop ring 5, the locking clamp 4 can flexibly rotate left and right and move up and down around the locking nut 3 within the distance between the lower stop ring 6 and the upper stop ring 5. Then, the end of the locking nut 3 with the lower stop ring 6 welded (or connected using other conventional connection methods) is turned counterclockwise on the upper end of the fixing bolt 1. Since the fixing nut 2 is a right-handed nut, the locking nut 3 must be a left-handed nut. After the locking nut 3 is turned counterclockwise to contact the fixing nut 2, the locking nut 3 is tightened counterclockwise onto the fixing bolt 1 using a tool. The locking nut 3 is then assembled onto the fixing bolt 1.This prevents the fixing nut from loosening automatically. Because the locking thread 7 is located on the outer wall of the end of the fixing nut 2 that contacts the locking nut 3, and the direction of the locking thread 7 is the same as the direction of the internal thread of the fixing nut 2 (it's a right-hand external thread), the direction of the internal thread on the inner wall of the locking clamp 4 is also the same as the direction of the internal thread of the fixing nut 2 (it's a right-hand internal thread). Furthermore, the locking clamp 4 and the locking thread 7 are matched, so the locking clamp 4 can rotate right-hand at the upper end of the locking thread 7 through the internal thread on its inner wall. After the locking clamp 4 is turned clockwise until its face contacts the lower stop ring 6, use a tool to tighten the locking clamp 4 clockwise onto the fixing nut 2, so that the face of the locking clamp 4 is pressed tightly against the lower stop ring 6, thereby preventing the locking nut 3 from loosening automatically. Finally, the shock-absorbing ring 8 is fitted onto the outer wall of the locking nut 3 within the distance between the upper stop ring 5 and the locking clamp 4. The shock-absorbing ring 8 is assembled onto the outer wall of the locking nut 3 within the range between the upper stop ring 5 and the locking clamp 4. Because the shock-absorbing ring 8 is elastic and its inner diameter is slightly smaller than the outer diameter of the locking nut 3, Therefore, the shock absorber ring 8 can be firmly fitted onto the outer wall of the locking nut 3. Because the diameter of the shock absorber ring 8 is slightly larger than the distance between the upper blocking ring 5 and the locking clamp 4, and due to its own elasticity, the shock absorber ring 8 can make close contact with the upper blocking ring 5 and press tightly against the clamp surface of the locking clamp 4. Since the upper blocking ring 5 is fixed to the outer wall of the locking nut 3, its position on the outer wall of the locking nut 3 will not move. The shock absorber ring 8 maintains close contact with the upper blocking ring 5 and presses tightly against the clamp surface of the locking clamp 4. In this situation, the shape of the damping ring 8 and its position on the outer wall of the locking nut 3 will not move. Therefore, when the locking clamp 4 is tightly pressed by the damping ring 8, there is no room for the locking clamp 4 to move in the direction of the upper blocking ring 5. This achieves the purpose of preventing the upper blocking ring 5 from automatically loosening through the damping ring 8. Thus, a bolt and nut structure that will not loosen is used to firmly fix the first object 9 and the second object 11 together.
[0019] When the site where the first and second fixed objects 9 and 11, which are fixed by a non-loosening bolt and nut structure, are located vibrates, regardless of whether the vibration causes the fixing nut 2 in the non-loosening bolt and nut structure to have a right-handed or left-handed tendency, the fixing nut 2 will remain stationary in its original position and will not loosen automatically. This is because: 1. When the fixing nut 2 is affected by vibration and has a right-handed tendency, this tendency would cause the fixing nut 2 to move downwards from its original position. However, since the lower end of the fixing nut 2 is in close contact with the upper end of the second connecting hole 12 of the second fixed object 11, the fixing nut 2 has no room to move downwards. Therefore, the fixing nut 2 eliminates the influence of the vibration and remains stationary in its original position. The fixing effect of the fixing nut 2 on the first and second fixed objects 9 and 11 remains unchanged. At the same time, the locking nut 3 and the locking clamp 4 are also affected by vibration and will have a rotational tendency in the same direction, i.e., a right-handed tendency. The right-handed tendency of the locking nut 3 will cause the locking nut 3 to move downwards from its original position. The upward tendency of the locking clamp 4 and its rightward rotation will cause the locking clamp 4 to move downward from its original position. However, since the clamp surface of the locking clamp 4 and the lower blocking ring 6 are in close contact at this time, and the lower blocking ring 6 is welded (or connected by other conventional connection methods) to the outer wall of the locking nut 3, its position is fixed. The locking clamp 4 is also tightened on the fixed nut 2. Therefore, under the influence of vibration, the upward tendency of the locking nut 3 and the downward tendency of the locking clamp 4 will occur at the contact point between the clamp surface of the locking clamp 4 and the lower blocking ring 6. The opposing trends of positional movement cancel each other out, thus eliminating the effects of vibration on both the locking nut 3 and the locking clamp 4, keeping them stationary in their original positions without displacement. Therefore, in a vibrating environment, due to the reasonable construction of a bolt and nut structure that prevents loosening, the fixing nut 2, locking nut 3, locking clamp 4, and shock-absorbing ring 8 in the structure all eliminate the effects of vibration, remaining stationary in their original positions without automatic loosening. The fixing effect on the first object 9 and the second object 11 remains unchanged.
[0020] 2. When the fixing nut 2 develops a left-handed rotational tendency due to vibration, this tendency will cause it to move upwards from its original position. Simultaneously, the locking nut 3 and locking clamp 4, also affected by vibration, will rotate in the same direction (left-handed). This left-handed rotation of the locking nut 3 will cause it to move downwards from its original position. However, since the upper end of the fixing nut 2 and the lower end of the locking nut 3 are in close contact at this time, the upward movement of the fixing nut 2 due to vibration and the downward movement of the locking nut 3... The downward displacement caused by vibration cancels out at the contact point between the fixing nut 2 and the locking nut 3. This eliminates the vibration's effect on both nuts 2 and 3, keeping them stationary and preventing displacement. The fixing effect of the fixing nut 2 on the first and second objects 9 remains unchanged. Similarly, the left-hand rotation of the locking clamp 4 causes it to move upward from its original position. However, because the bottom of the shock-absorbing ring 8 and the clamping surface of the locking clamp 4 are tightly closed at this point... The upper part of the damping ring 8 and the upper blocking ring 5 are in close contact. The upper blocking ring 5 is welded (or connected by other conventional connection methods) to the outer wall of the locking nut 3, and its position is fixed. The diameter and elasticity of the damping ring 8 are also fixed. The position of the damping ring 8 on the outer wall of the locking nut 3 will not be affected by vibration and will not move. Therefore, although the locking clamp 4 tends to move upward from its original position due to vibration, there is no room for upward movement because the locking clamp 4 and the damping ring 8 are in close contact. The clamp 4 thus eliminates the effects of vibration and remains stationary in its original position without displacement. This achieves the purpose of the upper blocking ring 5 preventing the locking clamp 4 from loosening automatically through the shock-absorbing ring 8. It can be seen that in a vibrating environment, due to the reasonable construction of a bolt and nut structure that will not loosen, the fixing nut 2, locking nut 3, locking clamp 4, and shock-absorbing ring 8 in the structure all eliminate the effects of vibration and remain stationary in their original positions without automatic loosening. The fixing effect on the first required fixed object 9 and the second required fixed position 11 remains unchanged.
[0021] Conversely, if the fixing nut 2 is replaced with a left-handed nut, then the locking nut 3 is a right-handed nut, the internal thread on the inner wall of the locking clamp 4 is a left-handed internal thread, and the locking thread 7 on the outer wall of one end of the fixing nut 2 is a left-handed external thread. As for the fixing principle and the fixing effect, they are the same as above, so they will not be repeated here.
[0022] In summary, a bolt and nut structure that will not loosen, due to its reasonable construction and mutual restraint, eliminates the effects of vibration on the fixing nut 2, locking nut 3, locking clamp 4, and damping ring 8 in a vibrating environment. They remain in their original positions and will not loosen automatically. This achieves the purpose of fixing the first object 9 and the second object 11 in a vibrating environment using a bolt and nut structure that will not loosen.
Claims
1. A non-loose bolt, nut structure comprising a fixing bolt (1), a fixing nut (2), characterized in that: The fixing bolt (1) has two types of external threads, one right-handed and one left-handed, each with an appropriate length. The fixing bolt (1) is assembled in the first connecting hole (10) of the first object to be fixed (9) and the second connecting hole (12) of the second object to be fixed (11). The direction of the internal thread of the fixing nut (2) is the reference for determining the direction of other external and internal threads. The fixing nut (2) is assembled on the fixing bolt (1) with one end in contact with the upper end of the second connecting hole (12) of the second object to be fixed (11). The other end of the fixing nut (2) that is not in contact with the second object to be fixed (11) has a locking thread (7) on its outer wall. This bolt and nut structure that will not loosen also includes a locking device.
2. A non-loosening bolt, nut structure according to claim 1, characterized in that: The locking device consists of a locking nut (3), a locking clamp (4), an upper blocking ring (5), a lower blocking ring (6), a locking thread (7), and a shock-absorbing ring (8). The internal thread direction of the locking nut (3) is exactly opposite to that of the fixing nut (2). The locking nut (3) is mounted on the fixing bolt (1) with one end in contact with the fixing nut (2). The lower blocking ring (6) is located at a position within one-quarter of the length of the locking nut (3) at the end where the locking nut (3) contacts the fixing nut (2). The lower blocking ring (6) is connected to the outer wall of the locking nut (3) through a hole in its center. The locking clamp (4) is mounted above the lower blocking ring (6) through a hole in its center. The upper blocking ring (7) is mounted on the lower blocking ring (8). The upper retaining ring (5) is located at half the length of the locking nut (3) above the locking ring (4). The upper retaining ring (5) is connected to the outer wall of the locking nut (3) through the hole in its center. The locking ring (4) is located within the distance between the upper retaining ring (5) and the lower retaining ring (6). The locking thread (7) is located on the outer wall of the end where the fixing nut (2) and the locking nut (3) are in contact. The direction of the locking thread (7) is consistent with the direction of the internal thread of the fixing nut (2). The direction of the internal thread on the inner wall of the locking ring (4) is consistent with the direction of the internal thread of the fixing nut (2). The locking ring (4) is connected to the locking thread (7). The shock-absorbing ring (8) is assembled on the outer wall of the locking nut (3) within the range between the upper retaining ring (5) and the locking ring (4).