Anti-falling bolt

Abstract

The utility model discloses an anti-falling bolt, and relates to the technical field of bolts. An anti-falling bolt comprises a nut and a stud, and the nut is provided with an inner threaded hole. The stud is provided with a standard section and a limiting section, a base is arranged at the bottom end of the limiting section, the limiting section is arranged at the top end of the standard section, and external threads matched with the internal threaded hole are arranged on the outer walls of the standard section and the limiting section; the stud is provided with an empty groove, the empty groove penetrates through the standard section and the limiting section, and a crack is formed in the stud. The bolt is simple in structure, convenient to use, capable of effectively preventing the bolt from falling off during assembly and use and high in stability.

Description

Technical Field

[0001] The present application relates to the technical field of bolts, and in particular to an anti-falling bolt. Background Art

[0002] In various types of industrial development, bolts play an important role in connecting components and are widely used. However, the problem of bolt loosening also arises. The existing anti-loosening bolts are mainly of the following types: (1) Double nut structure: Two nuts are screwed on the same bolt. Through the friction and pre-tightening force between the two nuts, the bolt is not easy to loosen under vibration or stress. After tightening, the lower nut can prevent the upper nut from rotating, playing an anti-loosening role. (2) Use of special gaskets or washers: Washers are spiral-shaped and elastic. When installing the bolt, the spring washer is compressed, generating a rebound force between the bolt and the connecting part, increasing the friction and preventing the bolt from loosening and falling off.

[0003] However, all of the above methods have their inevitable drawbacks. For example, when adding washers to prevent bolts from falling off, washers can easily wear out under high-intensity vibration. Double nuts take up more installation space and produce inconsistent preload force. Utility Model Content

[0004] The purpose of the present application is to provide an anti-falling bolt, which has a simple structure, is easy to use, can effectively prevent the bolt from falling off during assembly and use, and has strong stability.

[0005] The technical solution of this application is as follows:

[0006] The embodiment of the present application provides an anti-falling bolt, which includes a nut and a stud, wherein the nut is provided with an internal threaded hole; the stud is provided with a standard section and a limiting section, the bottom end of the limiting section is provided with a base, and the limiting section is provided at the top end of the standard section, and the outer walls of the standard section and the limiting section are both provided with external threads that match the internal threaded hole;

[0007] The inner diameter of the internal threaded hole is X, which matches the outer diameter of the standard section; the outer diameter of the top end of the limiting section is smaller than the outer diameter of the bottom end of the limiting section;

[0008] The stud is provided with an empty slot, which passes through the standard section and the limit section to form a crack on the stud;

[0009] In a natural state, including the empty groove, the minimum outer diameter of the limiting section matches the inner diameter of the internal threaded hole, and the maximum outer diameter of the limiting section is greater than X;

[0010] In the compressed state, the diameter of the above-mentioned empty groove approaches zero, and the maximum outer diameter of the above-mentioned limiting section matches the inner diameter of the above-mentioned internal threaded hole.

[0011] Furthermore, in some embodiments of the present application, in a natural state, the cross-section of the above-mentioned empty groove is V-shaped, and the V-shaped open end is flush with the top end of the above-mentioned limiting section.

[0012] Furthermore, in some embodiments of the present application, in a natural state, the diameter of the V-shaped open end of the above-mentioned empty groove is n, and n<X.

[0013] Furthermore, in some embodiments of the present application, the cross-section of the above-mentioned limiting segment is trapezoidal, the short bottom of the trapezoid is the top of the limiting segment, the long bottom is the bottom of the limiting segment, and the bottom of the above-mentioned limiting segment is connected to the top of the above-mentioned standard segment.

[0014] Furthermore, in some embodiments of the present application, in a natural state, including the empty groove, the outer diameter of the top end of the limiting section is X.

[0015] Furthermore, in some embodiments of the present application, in a natural state, the diameter of the empty slot on the same horizontal plane as the bottom end of the limiting section is m, and m<X.

[0016] Furthermore, in some embodiments of the present application, in a natural state, the outer diameter of the bottom end of the above-mentioned limiting section is X+m.

[0017] Furthermore, in some embodiments of the present application, the studs are integrally formed.

[0018] Compared with the prior art, the embodiments of the present application have at least the following advantages or beneficial effects:

[0019] In view of the above aspects, an embodiment of the present application provides an anti-falling bolt, wherein the stud is provided with a standard section and a limiting section, and an empty slot is provided on the stud, and crack openings are formed on the standard section and the limiting section. In a natural state, the empty slot exists normally, at which time the minimum outer diameter of the limiting section matches the inner diameter of the internal threaded hole of the nut, the maximum outer diameter is slightly larger than the inner diameter of the internal threaded hole of the nut, and the outer diameter of the standard section matches the inner diameter of the internal threaded hole of the nut; when subjected to an external force, the empty slot is compressed, and the studs located on both sides of the empty slot crack are pressed close to each other, and the width of the empty slot approaches zero. At this time, the maximum outer diameter of the limiting section matches the inner diameter of the internal threaded hole of the nut, and the minimum outer diameter is smaller than the inner diameter of the internal threaded hole of the nut.

[0020] Therefore, when assembling the bolt, since the minimum outer diameter of the limiting section matches the nut in its natural state, the adapter portion can be inserted into the nut first in its natural state. As the bolt is screwed, the stud is gradually compressed by the external force, thereby causing the entire limiting section to enter the nut and further extend through the nut to the outside. Alternatively, lateral pressure can be applied to the stud from the beginning to shrink the slot, thereby installing the stud into the nut. After the limiting section passes through the nut and extends to the outside, due to the loss of external pressure, the stud, especially the limiting section, rebounds to its natural state. At this time, since the maximum outer diameter of the limiting section is larger than the inner diameter of the threaded hole in the nut, it can play a role in limiting and fixing, thereby avoiding accidents such as the bolt falling off.

[0021] The present application provides an anti-falling bolt, which has a simple overall structure and is easy to operate. It can effectively prevent the bolt from accidentally falling off during assembly and use. It has strong stability and can be used for various mechanical connections and precision instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic structural diagram of an anti-falling bolt provided in this application;

[0024] Figure 2 This is a schematic diagram of the structure of the stud in the embodiment of the present application;

[0025] Figure 3 This is a schematic diagram of the structure of the nut in the embodiment of the present application.

[0026] Figure markings: 1-nut, 2-stud, 3-standard section, 4-limiting section, 5-empty slot, 6-base. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0030] In the description of the embodiments of the present application, it should be noted that if the terms "inside", "outside", "top" | "bottom" and the like indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the application is usually placed when in use. This is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0031] In the description of the embodiments of this application, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0032] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0033] The features and performance of the present application are further described in detail below with reference to the embodiments.

[0034] Example

[0035] See also Figures 1 to 3 The embodiment of the present application provides an anti-falling bolt, which includes a nut 1 and a stud 2. The nut 1 is provided with an internal threaded hole; the stud 2 is provided with a standard section 3 and a limiting section 4. The bottom end of the limiting section 4 is provided with a base 6. The limiting section 4 is provided at the top of the standard section 3. The outer walls of the standard section 3 and the limiting section 4 are both provided with external threads that match the internal threaded hole.

[0036] The inner diameter of the internal threaded hole is X, which matches the outer diameter of the standard section 3; the outer diameter of the top end of the limiting section 4 is smaller than the outer diameter of the bottom end of the limiting section 4;

[0037] The stud 2 is provided with a slot 5, which passes through the standard section 3 and the limiting section 4, forming a crack on the stud 2;

[0038] In a natural state, together with the above-mentioned empty groove 5, the minimum outer diameter of the above-mentioned limiting section 4 matches the inner diameter of the above-mentioned internal threaded hole, and the maximum outer diameter of the above-mentioned limiting section 4 is greater than X;

[0039] In the compressed state, the width of the above-mentioned slot 5 approaches zero, and the maximum outer diameter of the above-mentioned limiting section 4 matches the inner diameter of the above-mentioned internal threaded hole.

[0040] Furthermore, in a natural state, the cross section of the above-mentioned empty groove 5 is V-shaped, and the V-shaped opening end thereof is flush with the top end of the above-mentioned limiting section 4 .

[0041] Furthermore, in a natural state, the diameter of the V-shaped opening end of the above-mentioned empty groove 5 is n, and n<X.

[0042] Furthermore, the cross-section of the above-mentioned limiting section 4 is trapezoidal, the short bottom of the trapezoid is the top of the limiting section 4, and the long bottom is the bottom of the limiting section 4. The bottom end of the above-mentioned limiting section 4 is connected to the top of the above-mentioned standard section 3.

[0043] Furthermore, in a natural state, including the empty slot 5 , the outer diameter of the top end of the limiting section 4 is X.

[0044] Furthermore, in a natural state, the diameter of the empty slot 5 on the same horizontal plane as the bottom end of the limiting section 4 is m, where m<X.

[0045] Furthermore, in a natural state, the outer diameter of the bottom end of the above-mentioned limiting section 4 is X+m.

[0046] Furthermore, the stud 2 is integrally formed.

[0047] In the above embodiment, if Figure 2 and Figure 3 As shown, the inner diameter of the threaded hole in the nut 1 is X, and the stud 2 is provided with a V-shaped slot 5, which cuts the stud 2 in the vertical direction to form a crack;

[0048] In the natural state, the cross-sectional diameter of the empty slot 5 on the same horizontal plane as the bottom end of the limiting section 4 is m, the minimum outer diameter of the limiting section 4 (the outer diameter at the top end of the limiting section 4, including the empty slot 5) is X, and the maximum outer diameter of the limiting section 4 (the outer diameter at the bottom end of the limiting section 4) is X+m; the diameter of the top open end of the V-shaped empty slot 5 is n. Figure 2 It can be seen that (X+m)>X>n>m. In addition, in the natural state, the outer diameter of the standard section 3 is equal to the minimum outer diameter of the limiting section 4, which is X.

[0049] When the two sides of the stud 2 (limiting section 4 and standard section 3) divided by the slot 5 are subjected to lateral external force in a natural state, they will shrink inward and move closer together, and eventually the width of the slot 5 will approach zero, and the studs 2 on both sides will fit together. At this time, the maximum outer diameter of the limiting section 4 is basically equal to X, thereby ensuring that the limiting section 4 can be normally assembled with the nut 1 and pass through the internal threaded hole of the nut 1.

[0050] The structure after the stud 2 and the nut 1 are assembled is as follows Figure 1 As shown, the limiting section 4 passes through the nut 1 and extends to the outside of the nut 1, and the stud 2 (limiting section 4 and standard section 3) is in a natural state. At this time, the maximum outer diameter of the limiting section 4 (the outer diameter of the bottom end of the limiting section 4) is X+m, which is larger than the inner diameter X of the threaded hole in the nut 1, so that it can play its limiting role and avoid the occurrence of accidents such as falling off.

[0051] In summary, the present invention provides an anti-dropout bolt. When the bolt is assembled, the minimum outer diameter of the limit section 4 matches the nut 1 in its natural state. Therefore, the adapter portion can be inserted into the nut 1 first in its natural state. As the bolt is twisted, the stud 2 is gradually compressed by external force, thereby causing the entire limit section 4 to enter the nut 1 and further extend through the nut 1 to the outside. Alternatively, lateral pressure can be applied to the stud 2 from the beginning to cause the slot 5 to contract, thereby installing the stud 2 into the nut 1. After the limit section 4 passes through the nut 1 and extends outward, the stud 2, especially the limit section 4, rebounds to its natural state due to the loss of external pressure. At this time, because the maximum outer diameter of the limit section 4 is larger than the inner diameter of the threaded hole in the nut 1, it can play a role in limiting and fixing, thereby preventing accidents such as the bolt from falling out. The overall structure is simple, the operation is convenient, and it can effectively prevent the bolt from accidentally falling out during assembly and use. It has high stability and can be applied to various mechanical connections and precision instruments.

[0052] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

Claims

1. A bolt that prevents falling off, characterized in that: It includes a nut and a stud, wherein the nut is provided with an internal threaded hole; the stud is provided with a standard section and a limiting section, the bottom end of the limiting section is provided with a base, and the limiting section is provided at the top end of the standard section, and the outer walls of the standard section and the limiting section are both provided with external threads that match the internal threaded hole; The inner diameter of the internal threaded hole is X, which matches the outer diameter of the standard section; the outer diameter of the top end of the limiting section is smaller than the outer diameter of the bottom end of the limiting section; The stud is provided with an empty slot, which passes through the standard section and the limiting section to form a crack on the stud; In a natural state, including the empty slot, the minimum outer diameter of the limiting section matches the inner diameter of the internal threaded hole, and the maximum outer diameter of the limiting section is greater than X; In the compressed state, the width of the empty slot approaches zero, and the maximum outer diameter of the limiting section matches the inner diameter of the internal threaded hole.

2. The anti-falling bolt according to claim 1, characterized in that: In a natural state, the cross section of the empty slot is V-shaped, and the V-shaped opening end is flush with the top end of the limiting section.

3. The anti-falling bolt according to claim 2, characterized in that: In a natural state, the diameter of the V-shaped open end of the empty groove is n, where n<X.

4. The anti-falling bolt according to claim 1, characterized in that: The cross section of the limiting section is trapezoidal, the short bottom of the trapezoid is the top of the limiting section, the long bottom is the bottom of the limiting section, and the bottom of the limiting section is connected to the top of the standard section.

5. The anti-falling bolt according to claim 4, characterized in that: In a natural state, the outer diameter of the top end of the limiting section including the empty slot is X.

6. The anti-falling bolt according to claim 4, characterized in that: In a natural state, the diameter of the empty slot on the same horizontal plane as the bottom end of the limiting section is m, where m<X.

7. The anti-falling bolt according to claim 6, characterized in that: In a natural state, the outer diameter of the bottom end of the limiting section is X+m.

8. The anti-falling bolt according to claim 1, characterized in that: The stud is integrally formed.

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