Anti-loosening bolt

Abstract

The anti-loosening bolt comprises a screw rod, a conical sleeve and a pressing block are arranged at the lower end of the screw rod, the upper end and the lower end of the conical sleeve abut against the lower end face of the screw rod and the upper end face of the pressing block respectively, and a transmission groove is formed in the middle of the screw rod and penetrates through the upper end face and the lower end face of the screw rod. A transmission groove is formed in the conical sleeve, a transmission rod used for adjusting the distance between the pressing block and the screw rod is arranged in the transmission groove, the lower end of the transmission rod is fixedly connected with the pressing block, the transmission rod is arranged in the transmission groove in a transmission mode, and the maximum deformation diameter of the conical sleeve is larger than the diameter of the section of the screw rod. The screw rod has the anti-loosening function and can be suitable for the blind hole environment.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to an anti-loosening bolt. Background Art

[0002] Fasteners such as bolts and nuts are the main structural forms used to connect mechanical parts. Ordinary fasteners are prone to loosening when subjected to vibration, causing equipment failure and even safety accidents, resulting in property losses and threatening personal safety. Therefore, the problem of fastener anti-loosening has received more and more attention. At present, the Chinese patent with announcement number CN210440403U discloses a new type of shock-proof and anti-loosening bolt. This patent achieves the effect of shock-proof and anti-loosening by causing the thread of the bolt to expand. However, the inconvenience is that when the bolt is anti-loosening, it is necessary to operate on the back of the bolt, and this operation method is not suitable for the scenario of installing the bolt into a blind hole. Utility Model Content

[0003] The utility model provides an anti-loosening bolt, which solves the above problems existing in the use process of the prior art.

[0004] The technical solution of the utility model is achieved as follows: an anti-loosening bolt comprises a screw rod, a conical sleeve and a pressure block are arranged at the lower end of the screw rod, the upper and lower ends of the conical sleeve are respectively abutted against the lower end face of the screw rod and the upper end face of the pressure block, a transmission groove is opened in the middle of the screw rod, the transmission groove passes through the upper and lower end faces of the screw rod, a transmission rod for adjusting the distance between the pressure block and the screw rod is arranged in the transmission groove, the lower end of the transmission rod is fixedly connected to the pressure block, the transmission rod is arranged in the transmission groove, the maximum deformation diameter of the conical sleeve is greater than the cross-sectional diameter of the screw rod, and the horizontal cross-sectional area of ​​the pressure block does not exceed the coverage range of the horizontal cross-sectional area of ​​the screw rod.

[0005] The utility model is further configured as follows: the outer side wall of the transmission rod is connected to the inner side wall of the transmission groove through threaded cooperation.

[0006] The utility model is further configured as follows: the conical sleeve is arranged on the outside of the transmission rod.

[0007] The utility model is further configured as follows: a sliding sleeve is fixedly arranged on the inner side wall of the conical sleeve, the sliding sleeve is arranged between the transmission groove and the transmission rod, and a sliding groove for the sliding sleeve to slide is opened at the lower end of the transmission groove.

[0008] The utility model is further configured as follows: an annular clamping groove is provided on the outer side wall of the transmission rod.

[0009] The utility model is further configured as follows: the upper end surface of the transmission rod is provided with a first inner hexagon, and the upper end of the screw rod is provided with an outer hexagon.

[0010] The utility model is further configured as follows: a second hexagonal socket is provided on the lower end surface of the pressing block.

[0011] In summary, the beneficial effects of the present invention are:

[0012] 1. This structure can directly operate the transmission rod from the front of the screw, so that the screw can achieve the effect of anti-loosening function, which can be suitable for blind hole environment.

[0013] 2. The structure can adjust the distance between the pressing block and the screw by rotating the screw so that the edge of the tapered sleeve can be inserted into the blind hole.

[0014] 3. The setting of the sliding sleeve can make the conical sleeve evenly stressed when being squeezed, and prevent the screw from tilting in the blind hole.

[0015] 4. The upper end surface of the transmission rod and the lower end surface of the pressing block are respectively provided with a first inner hexagon socket and a second inner hexagon socket, which can facilitate people to adjust the position of the pressing block in different directions.

[0016] 5. The annular groove can be used in conjunction with the retaining spring, so that the retaining spring is inserted into the annular groove and abuts against the upper end surface of the screw, thereby further preventing loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the utility model.

[0021] Numbers in the figure: 1 screw, 11 transmission groove, 12 slide groove, 13 external hexagon, 2 tapered sleeve, 21 sliding sleeve, 3 pressing block, 31 transmission rod, 32 annular groove, 33 first internal hexagon, 34 second internal hexagon. DETAILED DESCRIPTION

[0022] The following will be combined with the attached embodiment of the utility model Figure 1-3, 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 them. 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.

[0023] Example:

[0024] like Figures 1 to 3 As shown, the utility model discloses an anti-loosening bolt, including a screw rod 1, a tapered sleeve 2 and a pressing block 3 are arranged at the lower end of the screw rod 1, wherein the upper and lower ends of the tapered sleeve 2 are respectively against the lower end surface of the screw rod 1 and the upper end surface of the pressing block 3, and in addition, the maximum deformation diameter of the tapered sleeve 2 is greater than the cross-sectional diameter of the screw rod 1, and the horizontal cross-sectional area of ​​the pressing block 3 does not exceed the coverage range of the horizontal cross-sectional area of ​​the screw rod 1. The structure mainly changes the spacing between the pressing block 3 and the screw rod 1 so that the end of the tapered sleeve 2 is embedded into the inner side wall of the blind hole during the flattening process of the tapered sleeve 2, thereby achieving the effect of further stabilizing the position of the screw rod 1 in the blind hole by using the tapered sleeve 2.

[0025] Specifically, a transmission groove 11 is provided in the middle of the screw 1, and the transmission groove 11 penetrates the upper and lower end surfaces of the screw 1. At the same time, a transmission rod 31 for adjusting the spacing between the pressing block 3 and the screw 1 is provided in the transmission groove 11. The lower end of the transmission rod 31 is fixedly connected to the pressing block 3, and the outer side wall of the transmission rod 31 is connected to the inner side wall of the transmission groove 11 through threaded cooperation. The upper end surface of the transmission rod 31 is provided with a first inner hexagon 33, and the upper end of the screw 1 is provided with an outer hexagon 13. Through this arrangement, people can use a hexagonal wrench to rotate the rotating rod to change the spacing between the pressing block 3 and the screw 1, and in this structure, the rotation of the transmission rod 31 and the screw 1 can be independent of each other and do not interfere with each other.

[0026] For further convenience, people carry out anti-loosening treatment on the screw rod 1 in different directions, and a second hexagon socket 34 is provided on the lower end surface of the pressing block 3 .

[0027] A sliding sleeve 21 is fixedly provided on the inner wall of the conical sleeve 2, and the sliding sleeve 21 is sleeved between the transmission groove 11 and the transmission rod 31. A sliding groove 12 for the sliding sleeve 21 to slide is provided at the lower end of the transmission groove 11. This structure is used to guide the conical sleeve 2 to prevent it from being skewed during the flattening process.

[0028] An annular groove 32 is provided on the outer wall of the transmission rod 31, and this structure can be used to cooperate with a retaining spring or other limiting mechanisms. For example, in order to further fix the position of the pressure block 3, the transmission rod 31 can be rotated to a position where the annular groove 32 on the transmission rod 31 is higher than the upper end surface of the screw 1, and the retaining spring is inserted into the annular groove 32 so that the retaining spring can be supported against the upper end of the screw 1. This method can effectively prevent the pressure block 3 from moving downward.

[0029] It should also be pointed out that the terms used in the present invention, such as "front", "rear", "vertical", "horizontal", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-loosening bolt, comprising a screw rod (1), characterized in that: A conical sleeve (2) and a pressing block (3) are provided at the lower end of the screw (1), the upper and lower ends of the conical sleeve (2) respectively abut against the lower end surface of the screw (1) and the upper end surface of the pressing block (3), a transmission groove (11) is provided in the middle of the screw (1), the transmission groove (11) penetrates the upper and lower end surfaces of the screw (1), a transmission rod (31) for adjusting the distance between the pressing block (3) and the screw (1) is provided in the transmission groove (11), the lower end of the transmission rod (31) is fixedly connected to the pressing block (3), the transmission rod (31) is transmission-set in the transmission groove (11), the maximum deformation diameter of the conical sleeve (2) is greater than the cross-sectional diameter of the screw (1), and the horizontal cross-sectional area of ​​the pressing block (3) does not exceed the coverage range of the horizontal cross-sectional area of ​​the screw (1).

2. The anti-loosening bolt according to claim 1, characterized in that: The outer side wall of the transmission rod (31) is connected to the inner side wall of the transmission groove (11) through threaded engagement.

3. The anti-loosening bolt according to claim 1, characterized in that: The conical sleeve (2) is sleeved on the outside of the transmission rod (31).

4. The anti-loosening bolt according to claim 3, characterized in that: A sliding sleeve (21) is fixedly arranged on the inner side wall of the conical sleeve (2), and the sliding sleeve (21) is sleeved between the transmission groove (11) and the transmission rod (31). A sliding groove (12) for the sliding sleeve (21) to slide is provided at the lower end of the transmission groove (11).

5. The anti-loosening bolt according to claim 2, characterized in that: An annular groove (32) is provided on the outer side wall of the transmission rod (31).

6. The anti-loosening bolt according to claim 2, characterized in that: The upper end surface of the transmission rod (31) is provided with a first inner hexagon (33), and the upper end of the screw rod (1) is provided with an outer hexagon (13).

7. The anti-loosening bolt according to claim 2, characterized in that: A second hexagonal socket (34) is formed on the lower end surface of the pressing block (3).

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