CN114893488A

CN114893488A - Locking fastening bolt based on locking means

Info

Publication number: CN114893488A
Application number: CN202210568295.7A
Authority: CN
Inventors: 魏伟
Original assignee: Jiangsu Ningxin Auto Parts Co ltd
Current assignee: Jiangsu Ningxin Auto Parts Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-08-12

Abstract

The invention discloses an anti-loosening fastening bolt based on a locking device, which belongs to the field of fasteners and is used for preventing loosening of bolts, and the anti-loosening fastening bolt comprises a screw rod, wherein the tail end of the screw rod is fixedly connected with a nut integrated with the screw rod, and the outer peripheral surface of the screw rod is provided with an external thread arranged along the length direction of the screw rod; the screw rod is screwed with a nut through an external thread, and an internal thread matched with the external thread is processed in an internal thread hole of the nut; the nut clamping sleeve is fixedly connected to the top end face of the nut and is coaxially arranged with the internal thread hole of the nut; a plurality of lower clamping teeth are processed at the top end of the nut clamping sleeve; lower latch and the last latch joint of circumference joint cover, circumference joint cover is fixed as an organic whole with the circumference stopper, the circumference stopper is spacing on the screw rod. In view of above-mentioned technical scheme, its zonulae occludens that can realize bolt and nut, and the mechanical structure through reasonable setting realizes the promotion of the locking performance of bolt and nut.

Description

Locking fastening bolt based on locking means

Technical Field

The invention belongs to the field of fasteners, and particularly relates to an anti-loose fastening bolt based on a locking device.

Background

The bolt is generally used for fixing two originally separated components into a whole, but in some scenes where bolt connection is applied and frequent disassembly is not needed, for example, at the connection position of some automobile parts, the looseness prevention of the nut is often realized through the friction acting force of the nut and the contact surface, but in the driving process of an automobile, the friction acting force of the nut and the contact surface is not enough to counteract the acting force generated by vibration to loosen the nut due to the vibration of an automobile body. A loose nut may, at a low rate, cause the two parts connected to each other to disengage, and at a high rate, may cause an unknown risk to the vehicle during travel. Therefore, how to realize the tight connection between the bolt and the nut and prevent the bolt from loosening when vibration occurs is one of the technical problems to be solved by the industry.

Disclosure of Invention

The invention aims to provide an anti-loosening fastening bolt based on a locking device, which can realize tight connection between a bolt and a nut and can improve the anti-loosening performance of the bolt and the nut through a reasonably arranged mechanical structure.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the locking-device-based anti-loose fastening bolt comprises a screw, wherein the tail end of the screw is fixedly connected with a nut integrated with the screw, and an external thread arranged along the length direction of the screw is processed on the outer peripheral surface of the screw; the screw rod is screwed with a nut through an external thread, and an internal thread matched with the external thread is processed in an internal thread hole of the nut; the method is characterized in that: the nut clamping sleeve is fixedly connected to the top end face of the nut and is coaxially arranged with the internal thread hole of the nut; a plurality of lower clamping teeth are processed at the top end of the nut clamping sleeve; the lower latch is clamped with the upper latch of the circumferential clamping sleeve, the circumferential clamping sleeve and the circumferential limiting sleeve are fixed into a whole, and the circumferential limiting sleeve is limited on the screw rod.

Furthermore, the screw rod is provided with a U-shaped groove on the central symmetrical plane, the U-shaped groove is connected with an axial limiting block on the circumferential limiting sleeve, and the axial limiting block is positioned inside the circumferential limiting sleeve and corresponds to the U-shaped groove.

Furthermore, the U-shaped buckle is placed in the U-shaped groove, a plurality of axial limiting teeth are distributed on two symmetrically-arranged outer side faces of the U-shaped buckle, and the axial limiting blocks abut against the axial limiting teeth.

Furthermore, the longitudinal section of the axial limiting tooth is triangular, and the axial limiting tooth comprises a limiting bottom surface which is arranged in parallel relative to the nut and a limiting inclined surface for enabling the axial limiting block to move towards the direction of the nut.

Furthermore, the upper latch is in a smooth transition structure.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, through the arrangement of the U-shaped groove, the U-shaped buckle and the circumferential limiting sleeve, the nut can realize limiting in the circumferential direction and the axial direction of the screw, and meanwhile, the anti-loosening of the connecting position of the nut and the screw can be effectively realized by matching with the friction force between the nut and the connecting end surface, so that the anti-loosening performance is improved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic diagram of the overall structure of the present invention.

FIG. 3 is a schematic view of the U-shaped buckle and the circumferential stop collar of the present invention.

Fig. 4 is a schematic structural view of the nut and the nut engaging sleeve of the present invention.

In the figure: 1. a screw; 2. a U-shaped groove; 3. a U-shaped buckle; 4. a circumferential limiting sleeve; 5. a circumferential clamping sleeve; 6. a nut clamping sleeve; 7. a nut; 8. a nut; 9. upper latch teeth; 10. a lower latch; 11. axial limit teeth; 12. an axial limiting block.

Detailed Description

The technical solution of the present invention will be further described and illustrated with reference to the following examples. In the course of this detailed description, the terms of orientation, including but not limited to "upper, lower, left, right," are used only to facilitate a person skilled in the art to understand the technical solutions described in the present application according to the visual orientations shown in the drawings. Unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and their meanings in the present invention may be understood by those skilled in the art as appropriate.

As shown in fig. 1 to 4, the locking device based anti-loose fastening bolt comprises a screw rod 1 and a nut 7, wherein the nut 7 is screwed in an external thread on the screw rod 1 through an internal thread; the bottom of screw rod 1 is connected with nut 8, and nut 8 is fixed as an organic whole with screw rod 1.

The screw rod 1 is processed with the recess to the position department of nut 8 along both sides from the top, and the recess constitutes U type groove 2 on screw rod 1, and the bottom surface in U type groove 2 is located the tooth bottom position below of screw rod 1 external screw thread. U type buckle 3 has been placed to the inside in U type groove 2, and the side outside processing that two symmetries of U type buckle 3 set up has a plurality of axial spacing teeth 11, and axial spacing tooth 11 distributes on two side length directions of U type buckle 3.

After the nut 7 is screwed into the screw rod 1, the U-shaped buckle 3 is placed in the U-shaped groove 2, so that the top end of the U-shaped buckle 3 is positioned in the groove at the top end of the screw rod 1, and the bottom end of the U-shaped buckle 3 is positioned at the position of the nut 7. At the moment, the circumferential clamping sleeve 5 slides downwards along the grooves of the U-shaped grooves 2 on the two sides of the screw rod 1 at the top end of the screw rod 1, so that the upper clamping teeth 9 at the bottom end of the circumferential clamping sleeve 5 are meshed with the lower clamping teeth 10 at the top end of the nut 7, the upper clamping teeth 9 and the lower clamping teeth 10 adopt the distribution form of dense teeth, and the meshing of the two clamping teeth can be realized by applying smaller torque to the nut 7.

The lower latch 10 is positioned on the nut clamping sleeve 6 on the top end face of the nut 7, and the nut clamping sleeve 6 and the nut 7 are coaxially arranged in the inner threaded hole. The nut clamping sleeve 6 is arranged to facilitate the processing of the lower clamping tooth 10 and simultaneously not to hinder the screwing of the nut 7 and the matching with an installation tool.

The external diameter of circumference joint cover 5 equals with the external diameter of nut joint cover 6, the internal diameter of circumference joint cover 5 equals with the internal diameter of nut joint cover 6, sets up the circumference joint cover 5 of equivalent size structure, the mesh of nut joint cover 6's aim at better messenger goes up latch 9, lower latch 10 meshing, guarantees the stability of meshing better at the in-process of meshing. Meanwhile, the corner position of the lower latch 10 adopts a smooth transition structural form, and the smooth transition structural form can be beneficial to the meshing smoothness of the upper latch 9 and the lower latch 10.

In the invention, the circumferential clamping sleeve 5 and the circumferential limiting sleeve 4 are fixed into a whole, the outer diameter of the circumferential limiting sleeve 4 is smaller than that of the circumferential clamping sleeve 5, a stepped structure is formed between the circumferential limiting sleeve and the circumferential clamping sleeve, and the stepped structure can provide a processing space for a reserved fastener. The fastening piece comprises a fastening screw, and the fastening screw can penetrate through a screw hole formed in the circumferential limiting sleeve 4 and is abutted with the U-shaped groove 2. The threaded hole is processed on the circumferential limiting sleeve 4 at a position corresponding to the axial limiting block 12.

The inboard symmetry of circumference stop collar 4 is provided with the axial stopper 12 that corresponds with U type groove 2, and a plurality of axial spacing tooth 11 joints that distribute on axial stopper 12 and the U type buckle 3. In order to facilitate the smoothness of the downward sliding of the axial limiting block 12 along the U-shaped groove 2, the axial limiting teeth 11 distributed on the U-shaped buckle 3 can be provided with downward-inclined limiting inclined planes, in order to prevent the axial limiting block 12 from being separated from the nut 8 in the direction away from the nut 8, the axial limiting teeth 11 are further provided with limiting bottom surfaces parallel to the nut 8, and the limiting bottom surfaces and the limiting inclined planes form a triangle on the U-shaped buckle 3.

The inner side surface of the axial limiting tooth 11 can be processed into a triangular structure with a plane top surface and a downward inclined side surface, the structure can facilitate the downward movement of the axial limiting tooth 11, and can prevent the separation of the circumferential limiting sleeve 4 from the direction far away from the nut 8.

The circumference stop collar 4 is in the in-process with U type buckle 3 complex, applys the effort to U type buckle 3 equally for U type buckle 3 is filled between U type groove 2 and the axial stopper 12 of circumference stop collar 4. Therefore, the connection stability of the U-shaped buckle 3, the circumferential limiting sleeve 4 and the U-shaped groove 2 can be better ensured.

Finally, although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description of the present description is for clarity reasons only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A locking fastening bolt based on a locking device comprises a screw rod (1), wherein the tail end of the screw rod (1) is fixedly connected with a nut (8) integrated with the screw rod, and an external thread arranged along the length direction of the screw rod is processed on the outer peripheral surface of the screw rod (1); a nut (7) is screwed on the screw rod (1) through an external thread, and an internal thread matched with the external thread is processed in an internal thread hole of the nut (7); the method is characterized in that: the nut clamping sleeve (6) is fixedly connected to the top end face of the nut (7), and the nut clamping sleeve (6) and an internal threaded hole of the nut (7) are coaxially arranged; a plurality of lower clamping teeth (10) are processed at the top end of the nut clamping sleeve (6); lower latch (10) and last latch (9) joint of circumference joint sleeve (5), circumference joint sleeve (5) are fixed as an organic whole with circumference stop collar (4), circumference stop collar (4) are spacing on screw rod (1).

2. The locking device based anti-loose fastening bolt as claimed in claim 1, characterized in that: the screw rod (1) is processed with U type groove (2) in its central symmetry plane department, and U type groove (2) are connected with axial stopper (12) on circumference stop collar (4), and axial stopper (12) are located the inside of circumference stop collar (4) and correspond the setting with U type groove (2).

3. The locking device based anti-loose fastening bolt as claimed in claim 2, characterized in that: u type buckle (3) have been placed in U type groove (2), it has a plurality of axial spacing teeth (11) to distribute on the lateral surface that two symmetries of U type buckle (3) set up, and axial stopper (12) butt is on axial spacing tooth (11).

4. The locking device based anti-loose fastening bolt as claimed in claim 3, characterized in that: the longitudinal section of the axial limiting tooth (11) is triangular, and the axial limiting tooth comprises a limiting bottom surface which is arranged in parallel relative to the nut (8) and a limiting inclined surface which is used for enabling the axial limiting block (12) to move towards the direction of the nut (8).

5. The locking device based anti-loose fastening bolt as claimed in claim 4, characterized in that: the upper latch (9) adopts a smooth transition structure.