CN114776688A

CN114776688A - Self-locking bolt

Info

Publication number: CN114776688A
Application number: CN202210497386.6A
Authority: CN
Inventors: 朱汉华; 刘彬
Original assignee: Jiangsu Yonghao High Strength Bolt Co ltd
Current assignee: Jiangsu Yonghao High Strength Bolt Co ltd
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2022-07-22
Anticipated expiration: 2042-05-09
Also published as: CN114776688B

Abstract

The invention discloses a self-locking bolt which comprises a screw rod, wherein a limiting plate is arranged at the top end of the screw rod, an inner ring groove is formed in the bottom end of the screw rod, the direction of threads on a rod body of the screw rod is opposite to the direction of inner threads of the inner ring groove, a lower locking piece is screwed at the bottom end of the screw rod, an inner groove hole is formed in the rod body at the top end of an inserted rod, a plurality of open grooves are uniformly formed in the top end of the inserted rod around the inner groove hole, a positioning column is arranged at the bottom of the inner groove hole, an upper locking piece is arranged at the top end of the inserted rod, threads are arranged on the inserted rod above the limiting plate, and an upper locking nut is screwed on the inserted rod above the upper locking piece. The invention can effectively prevent the bolt loosening phenomenon at the structural connection part and improve the connection stability.

Description

Self-locking bolt

Technical Field

The invention relates to a self-locking bolt, and belongs to the field of bolts.

Background

Bolted connection is a detachable fixed connection structure of wide use, has simple structure, connects reliably, loading and unloading convenient characteristics, but, receives the restriction of current swivel nut structure on the one hand, and on the other hand connection structure also receives effects such as connector self vibration for bolted connection has not hard up phenomenon, and the not hard up of fastener will seriously threaten mechanical equipment safety.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the self-locking bolt which can effectively prevent the bolt at the structural joint from loosening and improve the connection stability.

The technical scheme adopted by the invention is as follows:

a self-locking bolt comprises a screw, a limiting plate is arranged at the top end of the screw, an inner annular groove is formed in the bottom end of the screw, the direction of threads on a rod body of the screw is opposite to the direction of inner threads of the inner annular groove, a lower locking piece is screwed at the bottom end of the screw and comprises a lock head and four locking petals uniformly arranged at the bottom of the lock head, the lock head is screwed into the inner annular groove, the four locking petals are of a horn-shaped structure, and arc-shaped pieces are outwards arranged at the bottoms of the four locking petals; the lower lock nut comprises a bottom column and a boss of a circular truncated cone structure, the boss is arranged at the top of the bottom column, four clamping strips corresponding to the locking petals respectively are arranged on the side wall of the boss, and clamping grooves for the clamping strips to be inserted are formed in the inner sides of the four locking petals;

an inner slotted hole is arranged on the rod body at the top end of the inserted rod, a plurality of open slots are uniformly arranged at the top end of the inserted rod around the inner slotted hole, a positioning column is arranged at the bottom of the inner slotted hole, an upper locking piece is arranged at the top end of the inserted link, the upper locking piece comprises a pressing plate in an X-shaped structure, four plate bodies of the pressing plate correspondingly penetrate through the clamping groove at the top end of the inserted link, the middle part of the pressing plate penetrates through the positioning column, the bottoms of the tail ends of the four plate bodies of the pressure plate are provided with arc-shaped connecting plates, the opening sides of the bottom ends of the arc-shaped connecting plates are provided with arc-shaped inserting plates, the top of the limiting plate is provided with an arc connecting plate and an arc groove for inserting the arc-shaped inserting plate, one end of the arc groove, which is positioned in the same hour hand direction with the arc-shaped inserting plate, in the limiting plate is provided with an arc inner groove for inserting the arc-shaped inserting plate, the inserted rod positioned above the limiting plate is provided with a thread, and the inserted rod positioned above the pressing plate is rotatably provided with an upper locking nut.

Preferably, the inner wall of the inner slot hole is provided with threads in the same direction as the threads at the top end of the inserted rod, the bottom end of the upper lock nut is provided with an inner lock ring, the inner wall of the inner lock ring is provided with threads matched with the inserted rod and the threads on the inner wall of the inner slot hole, and the direction of the threads on the inserted rod and the inner wall of the inner slot hole is opposite to the direction of the threads on the rod body of the screw rod.

Further preferably, an elastic pad is sleeved on the positioning column positioned below the pressure plate.

Preferably, the top of one of the plate bodies of the pressing plate and the limiting plate positioned below the plate body is provided with a corresponding threaded hole, and a positioning bolt is screwed in the corresponding threaded hole.

Further preferably, a lower rubber sleeve with a truncated cone-shaped structure is sleeved on the outer side of each of the four locking pieces.

Preferably, a sunk groove with an inverted circular truncated cone structure is formed in the screw rod below the limiting plate, and an upper rubber sleeve with an inverted circular truncated cone structure is sleeved on the sunk groove.

Further preferably, an anti-slip ring is arranged on the bottom plate body of the limiting plate from inside to outside.

Further preferably, the outer ring of the limit plate is of a regular quadrilateral structure or a regular hexagon structure.

The invention has the beneficial effects that:

drive four lock lamellas outwards including opening then and go up threaded hole inner wall butt and carry on spacingly through the arc piece with connection structure through the lower lock mother, then die with inserted bar and screw rod lock through last lock, the reuse locks the female lock and dies the piece and lock, can effectually prevent that structural connection department is not hard up, has improved connection stability.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a cross-sectional view of the lower dead lock;

FIG. 3 is a top view of the limiting plate;

the main reference numerals in the figures have the following meanings:

1. the bolt, 2, limiting plate, 3, interior annular groove, 4, tapered end, 5, lock lamella, 6, arc piece, 7, inserted bar, 8, sill pillar, 9, boss, 10, card strip, 11, draw-in groove, 12, inside slot hole, 13, fluting, 14, reference column, 15, clamp plate, 16, arc connecting plate, 17, arc insert the board, 18, arc groove, 19, arc inside slot, 20, go up lock mother, 21, interior catch ring, 22, bullet pad, 23, screw hole, 24, positioning bolt, 25, lower rubber sleeve, 26, heavy groove, 27, go up the rubber sleeve.

Detailed Description

The invention is described in detail below with reference to the figures and examples.

As shown in fig. 1-3: the embodiment is a self-locking bolt, which comprises a screw rod 1, wherein a limiting plate 2 is arranged at the top end of the screw rod 1, an inner annular groove 3 is arranged at the bottom end of the screw rod 1, the direction of a thread on a rod body of the screw rod 1 is opposite to the direction of an inner thread of the inner annular groove 3, a lower locking piece is screwed at the bottom end of the screw rod 1, the lower locking piece comprises a lock head 4 and four locking flaps 5 uniformly arranged at the bottom of the lock head 4, the lock head 4 is screwed into the inner annular groove 3, the four locking flaps 5 are of a horn-shaped structure, and arc-shaped sheets 6 are outwards arranged at the bottoms of the four locking flaps 5; an inserting rod 7 is vertically inserted through the lock head 4, the screw rod 1 and the limiting plate 2, a lower locking nut is arranged on a rod body at the bottom end of the inserting rod 7 and comprises a bottom column 8 and a boss 9 of a circular truncated cone structure arranged at the top of the bottom column 8, four clamping strips 10 respectively corresponding to the locking petals 5 are arranged on the side wall of the boss 9, and clamping grooves 11 for the clamping strips 10 to insert are formed in the inner sides of the four locking petals 5;

an inner slotted hole 12 is arranged on a rod body at the top end of the inserted link 7, a plurality of slotted holes 13 are uniformly arranged at the top end of the inserted link 7 around the inner slotted hole 12, a positioning column 14 is arranged at the bottom of the inner slotted hole 12, an upper locking piece is arranged at the top end of the inserted link 7 and comprises a pressing plate 15 in an X-shaped structure, four plate bodies of the pressing plate 15 correspondingly penetrate through a clamping groove 13 at the top end of the inserted link 7, the positioning column 14 penetrates through the middle part of the pressing plate 15, an arc-shaped connecting plate 16 is arranged at the bottom end bottom of the four plate bodies of the pressing plate 15, an arc-shaped inserting plate 17 is arranged at the bottom end opening side of the arc-shaped connecting plate 16, an arc-shaped connecting plate 16 and an arc-shaped groove 18 for the arc-shaped inserting plate 17 to insert are arranged at the top of the limiting plate 2, an arc-shaped inner groove 19 for the arc-shaped inserting plate 17 to insert is arranged at one end of the arc-shaped groove 18 which is positioned in the same direction with the arc-shaped inserting plate 17 in the limiting plate 2, a thread is arranged on the inserted link 7 above the limiting plate 2, an upper locking nut 20 is screwed on the insert rod 7 above the pressing plate 15.

Referring to fig. 1, the inner wall of the inner slot 12 is provided with threads in the same direction as the threads at the top end of the inserted link 7, the bottom end of the upper locking nut 20 is provided with an inner locking ring 21, the inner wall of the inner locking ring 21 is provided with threads matched with the threads on the inserted link 7 and the inner wall of the inner slot 12, and the direction of the threads on the inserted link 7 and the inner wall of the inner slot 12 is opposite to the direction of the threads on the body of the screw rod 1.

Referring to fig. 1, a spring washer 22 is sleeved on the positioning column 14 below the pressure plate 15.

Referring to fig. 1, a corresponding threaded hole 23 is formed in one of the pressing plates 15 and the top of the limiting plate 2 located below the plate, and a positioning bolt 24 is screwed into the corresponding threaded hole 23.

As shown in fig. 1, a lower rubber sleeve 25 with a truncated cone structure is sleeved on the outer side of the four locking flaps 5.

Referring to fig. 1, a screw 1 located below the limiting plate 2 is provided with a sink groove 26 in an inverted circular truncated cone structure, and an upper rubber sleeve 27 in an inverted circular truncated cone structure is sleeved on the sink groove 26.

In this embodiment, from inside to outside, be provided with the antiskid circle on the bottom plate body of limiting plate 2.

In the embodiment, when viewed from the top, the outer ring of the limiting plate 2 is in a regular hexagon structure; in practical applications, the outer ring of the limiting plate 2 may also be a regular quadrilateral structure.

In practical application, the screw rod 1 is screwed into the joint, the upper rubber sleeve 27 is attached to the inner side of the threaded hole of the joint, the lower locking piece sleeved with the lower rubber sleeve 25 is screwed to the bottom end of the screw rod 1 from the bottom, the inserting rod 7 with the lower locking nut sequentially penetrates through the lower locking piece, the screw rod 1 and the limiting plate 2 from the bottom end and extends to the upper part of the limiting plate 2, and when the inserting rod 7 is inserted, the four clamping strips 10 arranged on the side wall of the boss 9 are clamped into the clamping grooves 11 corresponding to the inner sides of the locking flaps 5, force is applied upwards from the bottom, and then the locking flaps 5 are expanded outwards to drive the lower rubber sleeve 25 to be attached to the inner side of the threaded hole of the joint; outside establishing reference column 14 with bullet pad 22 cover, establish on reference column 14 with clamp plate 15 cover again, make four plate bodys of clamp plate 15 pass through corresponding fluting 13 to make the arc connecting plate 16 and the arc of clamp plate 15 plate body end bottom insert in the corresponding arc 18, then rotatory clamp plate 15 makes the arc insert the board 17 insert the arc 19 in the back and spin on positioning bolt 24, will go up lock nut 20 again and establish soon and make it carry on spacingly to clamp plate 15.

The above description is only a preferred embodiment of the present patent, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the inventive concept, and these modifications and decorations should also be regarded as the protection scope of the present patent.

Claims

1. A self-locking bolt is characterized in that: the locking device comprises a screw rod (1), wherein a limiting plate (2) is arranged at the top end of the screw rod (1), an inner annular groove (3) is arranged at the bottom end of the screw rod (1), the direction of a thread on the rod body of the screw rod (1) is opposite to the direction of an inner thread of the inner annular groove (3), a lower locking piece is screwed at the bottom end of the screw rod (1), the lower locking piece comprises a lock head (4) and four locking flaps (5) uniformly arranged at the bottom of the lock head (4), the lock head (4) is screwed into the inner annular groove (3), the four locking flaps (5) are of a horn-shaped structure, and arc-shaped pieces (6) are outwards arranged at the bottoms of the four locking flaps (5); an inserting rod (7) is vertically inserted through the lock head (4), the screw (1) and the limiting plate (2), a lower locking nut is arranged on a bottom rod body of the inserting rod (7), the lower locking nut comprises a bottom column (8) and a boss (9) which is arranged at the top of the bottom column (8) and is of a circular truncated cone structure, four clamping strips (10) which respectively correspond to the locking petals (5) are arranged on the side wall of the boss (9), and clamping grooves (11) for the clamping strips (10) to insert are formed in the inner sides of the four locking petals (5);

be provided with interior slotted hole (12) on the top body of rod of inserted bar (7), encircle interior slotted hole (12) have evenly seted up a plurality of fluting (13) on the top of inserted bar (7), are provided with reference column (14) in the bottom of interior slotted hole (12), are provided with on the top of inserted bar (7) and lock extremely, on lock extremely including clamp plate (15) that is X type structure, draw-in groove (13) and the middle part of clamp plate (15) that insert the top of inserted bar (7) were inserted to four plate body correspondences of clamp plate (15), have been inserted reference column (14) in the middle part of four plate body ends bottom of clamp plate (15), be provided with arc connecting plate (16) in the bottom opening side of arc connecting plate (16), be provided with arc connecting plate (16) and supply arc to insert board (17) male arc groove (18) at limiting plate (2) top, along with arc inserting plate (17) and hour hand be located same direction's arc groove (18) One end of the connecting rod is provided with an arc-shaped inner groove (19) for inserting the arc-shaped inserting plate (17), the inserting rod (7) positioned above the limiting plate (2) is provided with threads, and the inserting rod (7) positioned above the pressing plate (15) is rotatably provided with an upper lock nut (20).

2. The self-locking bolt according to claim 1, characterized in that the inner wall of the inner slot (12) is provided with threads in the same direction as the threads at the top end of the inserted bar (7), the bottom end of the upper lock nut (20) is provided with an inner locking ring (21), the inner wall of the inner locking ring (21) is provided with threads matched with the threads on the inner walls of the inserted bar (7) and the inner slot (12), and the direction of the threads on the inner walls of the inserted bar (7) and the inner slot (12) is opposite to the direction of the threads on the rod body of the screw (1).

3. Self-locking bolt according to claim 1, characterised in that a spring washer (22) is placed on the positioning stud (14) under the pressure plate (15).

4. The self-locking bolt according to claim 1, wherein a corresponding threaded hole (23) is formed in one of the pressing plates (15) and the top of the limiting plate (2) below the plate, and a positioning bolt (24) is screwed into the corresponding threaded hole (23).

5. The self-locking bolt according to claim 1, characterized in that the outer side of the four locking lobes (5) is sleeved with a lower rubber sleeve (25) of a truncated cone structure.

6. The self-locking bolt according to claim 1, characterized in that the screw (1) below the limiting plate (2) is provided with a sink groove (26) with an inverted circular truncated cone structure, and an upper rubber sleeve (27) with an inverted circular truncated cone structure is sleeved on the sink groove (26).

7. The self-locking bolt according to claim 1, characterized in that an anti-slip ring is arranged on the bottom plate body of the limiting plate (2) from inside to outside.

8. The self-locking bolt according to claim 1, characterized in that the outer ring of the limiting plate (2) is of a regular quadrilateral or hexagonal configuration.