Bolt fastener

Abstract

The utility model discloses a bolt fastener which structurally comprises a bolt body, the bolt body comprises a head portion and a rod portion, at least two containing holes are formed in the outer ring of the end, close to the head portion, of the rod portion at equal intervals, clamping blocks are arranged in the containing holes in a telescopic mode, a matched inclined waist is formed on one side of the outer end of each clamping block, and a backing ring is further arranged on the outer side of the rod portion. A plurality of clamping grooves matched with the clamping blocks are formed in the inner circumferential face of the backing ring at equal intervals. When the bolt body is in a tightened state, the outer ends of the clamping blocks and the corresponding clamping grooves form clamping limiting so as to limit reverse rotation of the rod part. When the bolt body is in a fastening state, counterclockwise rotation of the screw rod is limited through matching between the vertical faces of the clamping blocks and the clamping grooves, the screw rod is prevented from loosening due to counterclockwise rotation of vibration force, and the anti-loosening effect of the bolt body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of standard parts, and more particularly to a bolt fastener. Background Art

[0002] A bolt is a mechanical part, a cylindrical threaded fastener equipped with a nut. It is a type of fastener consisting of a head and a screw (a cylinder with external threads). It needs to be matched with a nut to fasten two parts with through holes. This type of connection is called a threaded connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the threaded connection is a detachable connection.

[0003] When using existing bolt fasteners, in order to improve the anti-loosening effect of the bolt, a gasket is usually added between the bolt and the preset hole position. However, the reliability of relying solely on the gasket to provide anti-loosening effect is poor. After a certain period of operation, the bolt will still reduce the anti-loosening effect due to vibration and other reasons. For some blind holes, loose bolts may affect the service life of the machine, mechanical safety and personal safety. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a bolt fastener to solve the above technical problems.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bolt fastener, comprising a bolt body, the bolt body comprising a head and a rod, the outer ring of the rod near one end of the head is equidistantly and spaced apart with at least two accommodating holes, a clamping block is telescopically arranged in the accommodating hole, and a matching oblique waist is formed on one side of the outer end of each clamping block, a gasket is also provided on the outside of the rod, and a plurality of clamping grooves adapted to the clamping block are equidistantly and spaced apart on the inner circumference of the gasket, when the bolt body is in a tightened state, the outer end of each clamping block forms a clamping limit with the corresponding clamping groove to limit the reversal of the rod.

[0006] The utility model is further configured as follows: two limiting grooves are correspondingly formed on the inner side wall of the accommodating hole, and a limiting block adapted to the two limiting grooves is formed on one end of the clamping block located in the clamping groove.

[0007] The utility model is further configured as follows: a spring member is provided between the inner end surface of the clamping block and the inner bottom surface of the clamping groove.

[0008] The utility model is further configured as follows: a receiving recess is formed at the center of the top surface of the head, a plurality of through holes connected to the card slots are opened on the bottom wall of the receiving recess, a sliding rod is built into the through hole and a matching block is formed at the lower end of the sliding rod, and the card block is provided with a matching groove adapted to the matching block.

[0009] The utility model is further configured as follows: the upper end of each sliding rod extends into the accommodating recess and is commonly connected to a positioning block, the positioning block is slidably arranged in the accommodating recess, and the upper inner side of the accommodating recess is threadedly connected to a fastening block, and when the fastening block is in a tightened state, it drives the positioning block to press downward and prompts the matching block to be pressed into the accommodating hole.

[0010] The utility model is further configured as follows: a guide hole is opened at the center of the bottom wall of the accommodating recess, the lower end surface of the positioning block has a guide block that is slidably matched with the guide hole, and the outer ring of the guide block is provided with multiple groups of butterfly springs corresponding to each other.

[0011] The utility model is further configured as follows: the head of the bolt body is located at the outer side of the opening end of the accommodating recess and has two spare grooves corresponding thereto.

[0012] The utility model is further configured as follows: a plurality of inclined grooves are equidistantly and circumferentially distributed on one side of the gasket.

[0013] In summary, the utility model has the following beneficial effects: when the bolt is in a tightened state, the two sides of the gasket are respectively pressed against the head and the outer wall of the preset hole. In the above state, since the outer end faces of each clamping block are formed with a matching waist, when the screw rotates clockwise, each clamping block will not cause obstruction or jamming to the rotation of the screw through the matching waist and the matching groove; when the bolt body is vibrated, the vibration is transmitted to the rod part, and when the bolt body is in a tightened state, the counterclockwise rotation of the screw is limited by the cooperation between the vertical surfaces of each clamping block and the clamping groove, thereby preventing the screw from loosening due to counterclockwise rotation of the vibration force, thereby improving the anti-loosening effect of the bolt body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the internal structure of the head of the bolt body of the present invention;

[0017] Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A;

[0018] Figure 4 This is a schematic structural diagram of the gasket ring of the utility model;

[0019] Figure 5This is a structural diagram of the card block of the utility model.

[0020] Figure numerals: 1. bolt body; 10. head; 11. rod; 12. spare groove; 2. accommodating hole; 20. clamping block; 21. matching oblique waist; 22. limiting groove; 23. limiting block; 24. spring member; 25. matching groove; 3. gasket; 30. clamping groove; 31. oblique groove; 4. accommodating recess; 40. through hole; 41. sliding rod; 42. matching block; 43. positioning block; 44. fastening block; 45. guide hole; 46. guide block; 47. butterfly spring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-5 As shown, a bolt fastener of an embodiment of the present invention includes a bolt body 1, which includes a head 10 and a rod 11. The outer ring of the rod 11 near one end of the head 10 is equidistant and spaced apart with at least two accommodating holes 2, and a clamping block 20 is telescopically arranged in the accommodating hole 2. A matching oblique waist 21 is formed on one side of the outer end of each clamping block 20. A gasket 3 is also provided on the outside of the rod 11, and a plurality of clamping grooves 30 adapted to the clamping block 20 are equidistant and spaced apart on the inner circumference of the gasket 3. When the bolt body 1 is in a tightened state, the outer end of each clamping block 20 forms a clamping limit with the corresponding clamping groove 30 to prevent the rod 11 from reversing.

[0023] When in use, the washer 3 is sleeved on the outside of the rod 11 of the bolt body 1, and then the rod 11 is aligned with the preset hole and tightened. When the bolt body 1 is in the tightened state, the two sides of the washer 3 are respectively pressed against the head 10 and the outer wall of the preset hole. In the above state, since the outer end surface of each clamping block 20 is formed with a matching waist 21 and the matching waist 21 of each clamping block is distributed in the same position, when the bolt body 1 is rotated clockwise, the matching waist 21 of each clamping block 20 and the matching groove 30 will not cause obstruction or jamming to the rotation of the screw;

[0024] When the bolt body 1 is subjected to vibration, the vibration is transmitted to the rod 11. When the bolt body 1 is in a tightened state, the counterclockwise rotation of the screw rod is limited by the cooperation between the vertical surfaces of each clamping block 20 and the clamping groove 30, thereby preventing the bolt body 1 from loosening due to counterclockwise rotation due to the vibration force, thereby improving the anti-loosening effect of the bolt body 1.

[0025] Two limiting grooves 22 are correspondingly formed on the inner side wall of the accommodating hole 2 , and a limiting block 23 adapted to the two limiting grooves 22 is formed on one end of the clamping block 20 located in the clamping groove 30 .

[0026] When in use, the movement path of the clamping block 20 is limited by the cooperation between the limiting block 23 and the limiting groove 22 .

[0027] A spring member 24 is disposed between the inner end surface of the clamping block 20 and the inner bottom surface of the clamping slot 30 .

[0028] During use, both ends of the spring member 24 are fixedly connected to the inner end surface of the clamping block 20 and the inner bottom surface of the clamping slot 30 respectively, and the spring member 24 provides an elastic reciprocating force for the clamping block 20 .

[0029] A receiving recess 4 is formed at the center of the top surface of the head 10. The bottom wall of the receiving recess 4 is provided with a plurality of through holes 40 that are connected to the card slot 30. A slide rod 41 is built into the through hole 40, and a matching block 42 is formed at the lower end of the slide rod 41. The card block 20 is provided with a matching groove 25 that is adapted to the matching block 42. The upper end of each slide rod 41 extends into the receiving recess 4 and is commonly connected to a positioning block 43. The positioning block 43 is slidably set in the receiving recess 4, and the upper side of the receiving recess 4 is provided with a positioning block 43. The inner wall of the accommodating recess 4 is provided with an internal thread and the outer circumference of the fastening block 44 is provided with an external thread. When the fastening block 44 is tightened, it drives the positioning block 43 to press down and prompts the matching block 42 to be pressed into the accommodating hole 2. A guide hole 45 is provided at the center of the inner bottom wall of the accommodating recess 4. The lower end surface of the positioning block 43 is provided with a guide block 46 that is slidably matched with the guide hole 45. The outer ring of the guide block 46 is provided with multiple groups of butterfly springs 47 corresponding to each other.

[0030] During use, when loading and unloading gaskets or removing nuts, each clamping block 20 needs to be retracted into the accommodating hole 2 at the same time and kept in the retracted state. At this time, it is necessary to tighten the fastening block 44 with a screwdriver (a screw hole adapted to the screwdriver is provided at the center of the top surface of the fastening block 4). The fastening block 44 moves downward along the accommodating recess 4 through the threaded connection with the accommodating recess 4. The fastening block 44 moves downward and forces the positioning block 43 to press against the bottom wall of the accommodating recess 4. The moving path of the fastening block 44 is controlled by the cooperation between the guide block 46 and the guide hole 45. To define the position, the positioning block 43 is pressed down while pressing each butterfly spring 47 and causing each butterfly spring 47 to be in an energy storage state. The positioning block 43 is pressed down to drive the slide rod 41 and the matching block 42 to move. The matching block 42 enters the accommodating hole 2 and causes each clamping block 20 to retract into the accommodating hole 2 synchronously and maintain the retracted state through the cooperation between the two inclined surfaces of the matching groove 25. When the clamping block 20 retracts, it causes each spring member 24 to be in an energy storage state. When each clamping block 20 needs to be released from the retracted state and extend out of the corresponding accommodating hole 2, the opposite operation can be performed.

[0031] The head 10 of the bolt body 1 is located outside the open end of the receiving recess 4 and has two spare grooves 12 corresponding thereto.

[0032] During use, when the head 10 of the bolt body 1 is difficult to rotate due to the threaded teeth, a tool can be passed through the two spare grooves 12 to drive the bolt to rotate, thereby improving the flexibility of use of the bolt body 1.

[0033] A plurality of inclined grooves 31 are equidistantly and circumferentially distributed on one side of the gasket 3 .

[0034] When in use, when the bolt body 1 is tightened, one side of the washer 3 contacts the outer side surface of the preset hole position, and the friction between the washer 3 and the fixed object is increased through the inclined grooves 31, further improving the anti-loosening performance of the bolt body 1.

[0035] It should also be pointed out that the terms indicated in the present invention, such as "front", "rear", "vertical", "horizontal", etc., which indicate orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do 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, they cannot be understood as limiting the scope of protection of the present invention.

[0036] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A bolt fastener, comprising a bolt body (1), wherein the bolt body (1) comprises a head (10) and a shank (11), and is characterized in that: The outer ring of the rod (11) near one end of the head (10) is equidistantly and spaced apart with at least two accommodating holes (2), a clamping block (20) is telescopically arranged in the accommodating hole (2), and a matching oblique waist (21) is formed on one side of the outer end of each clamping block (20). A gasket (3) is also arranged on the outer side of the rod (11), and a plurality of slots (30) adapted to the clamping block (20) are equidistantly and spaced apart on the inner circumference of the gasket (3). When the bolt body (1) is in a tightened state, the outer end of each clamping block (20) forms a clamping limit with the corresponding slot (30) to prevent the rod (11) from reversing.

2. The bolt fastener according to claim 1, wherein: Two limiting grooves (22) are correspondingly formed on the inner side wall of the accommodating hole (2), and a limiting block (23) adapted to the two limiting grooves (22) is formed on one end of the clamping block (20) located in the clamping groove (30).

3. The bolt fastener according to claim 2, characterized in that: A spring member (24) is provided between the inner end surface of the clamping block (20) and the inner bottom surface of the clamping groove (30).

4. The bolt fastener according to claim 1, wherein: A receiving recess (4) is formed at the center of the top surface of the head (10), and a plurality of through holes (40) communicating with the card slot (30) are provided on the bottom wall of the receiving recess (4). A sliding rod (41) is built into the through hole (40), and a matching block (42) is formed at the lower end of the sliding rod (41), and the card block (20) is provided with a matching groove (25) adapted to the matching block (42).

5. The bolt fastener according to claim 4, characterized in that: The upper end of each of the sliding rods (41) extends into the accommodating recess (4) and is commonly connected to a positioning block (43). The positioning block (43) is slidably arranged in the accommodating recess (4). The upper inner portion of the accommodating recess (4) is threadedly connected to a fastening block (44). When the fastening block (44) is in a tightened state, it drives the positioning block (43) to press downward and prompts the matching block (42) to be pressed into the accommodating hole (2).

6. The bolt fastener according to claim 5, characterized in that: A guide hole (45) is provided at the center of the bottom wall of the accommodating recess (4), and a guide block (46) is provided on the lower end surface of the positioning block (43) so as to be slidably matched with the guide hole (45). The outer ring of the guide block (46) is provided with a plurality of butterfly springs (47) corresponding to each other.

7. The bolt fastener according to claim 4, characterized in that: The head (10) of the bolt body (1) is located outside the open end of the accommodating recess (4) and has two spare grooves (12) corresponding thereto.

8. The bolt fastener according to claim 1, wherein: One side of the gasket (3) is provided with a plurality of angular grooves (31) which are equidistant and circumferentially distributed.

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