CN110848231A

CN110848231A - Anti-loosening connecting pair

Info

Publication number: CN110848231A
Application number: CN201911177379.2A
Authority: CN
Inventors: 贾贤杰; 蒋旭
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-02-28

Abstract

The invention discloses an anti-loosening connecting pair, which comprises an eccentric bolt, a backstop piece and a locking piece, wherein the eccentric bolt comprises a screw rod part, one end of the screw rod part is provided with an inner nut or an extension bolt in threaded fit with the locking piece, and the inner nut or the extension bolt and the axis of the screw rod part are not on the same straight line; stopping piece cover is established screw rod portion, stopping piece orientation one side of lock piece is equipped with the bellying, be equipped with C type bayonet socket on the bellying, the lock piece with stopping piece supports and blocks into in the C type bayonet socket. When the machine provided with the connecting pair is in a high-frequency vibration state, the connecting pair is more firmly and stably locked due to the existence of multiple actions.

Description

Anti-loosening connecting pair

Technical Field

The invention belongs to the technical field of fasteners, and particularly relates to an anti-loosening connecting pair.

Background

Mechanical equipment adopts threaded connection's mode usually, and the fastener mostly is ordinary bolt and nut connection fastening's mode promptly ordinary bolt pair, to the metal structure product that will often transport the equipment, provides the convenience in the dismouting. But this connection is susceptible to loosening in mechanical shock and variable load environments. The mode of increasing frictional force among the prior art makes machinery loosen or prevent not hard up between bolt, the nut, and the mode of increasing frictional force commonly used is for increasing spring nut or two nuts, inlaying the nylon packing ring, setting up concave cone or scribble modes such as adhesive, but the nut can be not hard up in certain clearance, and reuse rate is low, and the installation condition receives great restriction, leads to current threaded connection mode extremely unstable.

Utility model CN 203809476U discloses a locknut, including the nut body that has main screw hole, have the self-locking cover of auto-lock screw hole, the upper end of nut body has the eccentric boss that upwards extends, the axis of this eccentric boss has an eccentric distance with the axis of main screw hole, the lower end of self-locking cover has the eccentric dead hole that overlaps on the eccentric boss, the axis of this eccentric dead hole and the axis of eccentric boss coincide, have frictional force between the inner perisporium of eccentric dead hole and the eccentric boss periphery wall, under the initial state of auto-locking cover setting at eccentric boss, the axis of auto-lock screw hole and the axis of main screw hole coincide, have the clearance between the upper end of eccentric boss and the eccentric dead hole roof simultaneously, under the state that the auto-locking cover deflects an angle relative to the boss, the axis of auto-lock screw hole and the axis of main screw hole take place to squint, the anti-loosening effect is enhanced because the self-locking sleeve and the nut cylinder are locked together due to the offset.

The common eccentric bolt can meet the installation requirement of a standing or high-frequency operation device, but the machine is usually in a high-frequency vibration state during operation, and the common eccentric bolt is easily loosened and falls off due to the high-frequency vibration of the machine during connection, and even accidents can occur.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the anti-loosening connecting pair to solve the technical problem that the bolt connecting pair is easy to loosen and even fall off under the high-frequency vibration state when mechanical equipment runs.

In order to achieve the purpose, the technical scheme of the invention is as follows:

an anti-loosening connecting pair comprises an eccentric bolt, a locking bolt and a retaining piece, wherein the eccentric bolt comprises a screw rod part and an inner nut, the retaining piece is sleeved on the screw rod part, the inner nut is a groove formed in one end of the screw rod part, and the central axis of the screw rod part and the central axis of the inner nut are not on the same straight line; the locking bolt is coaxially provided with a flange part I, a boss part I and a bolt part (230) which are sequentially connected, and the bolt part (230) is in threaded connection with the inner nut; stopping piece orientation one side of boss portion I is equipped with the bellying, be equipped with C type bayonet socket on the bellying, the boss portion I of locking bolt with stopping piece supports and block in the C type bayonet socket.

Further, an external thread I is arranged on the outer wall of the screw rod part, an internal thread I is arranged on the inner wall of the inner nut, and the screwing directions of the external thread I and the internal thread I are opposite; and the bolt part is provided with an external thread II with the same spiral direction as the internal nut.

Preferably, the external thread I is a right-handed thread, the internal thread I is a left-handed thread, and the external thread II is a left-handed thread.

Preferably, a tooth-shaped protrusion I is arranged on one side, facing the retaining piece, of the boss part I of the locking bolt.

An anti-loosening connecting pair comprises an eccentric bolt, a locking nut and a retaining piece, wherein the eccentric bolt comprises an integrated screw rod part and an extending bolt; the locking nut comprises a flange part II, a boss part II and a nut part which are coaxially arranged, the nut part is arranged at the axle center of the flange part II and the boss part II in a penetrating way, and the nut part is in threaded connection with the extension bolt; stopping piece orientation one side of boss portion II is equipped with the bellying, be equipped with C type bayonet socket on the bellying, locking nut's boss portion II with stopping piece supports and blocks into in the C type bayonet socket.

Further, an external thread I is arranged on the outer wall of the screw rod part, an external thread III is arranged on the outer wall of the extension bolt, and the rotating directions of the external thread I and the external thread III are opposite; and an internal thread III which is the same as the screwing direction of the extension bolt is arranged in the locking nut.

Preferably, the external thread I is a right-handed thread, the external thread III is a left-handed thread, and the internal thread III is a left-handed thread.

Preferably, one side of the boss part II of the locking nut, which faces the retaining member, is provided with a toothed protrusion II.

Preferably, the retaining member is a retaining nut, and the retaining nut is provided with an internal thread II which has the same rotation direction as the screw rod portion.

Preferably, the backstop piece is a backstop gasket, and the backstop gasket is sleeved on the screw part of the eccentric bolt through interference fit.

Preferably, the eccentric bolt further comprises a nut at an end remote from the inner nut or the extension bolt.

Further, the mounting method of the connecting pair comprises the following steps:

(1) respectively reserving a mounting hole A and a mounting hole B on a component A and a component B which need to be provided with a connecting pair on a high-frequency vibration machine, wherein the inner wall of the mounting hole B is provided with an internal thread IV with the same thread turning direction as the outer wall of the screw rod part, a notch for limiting the deviation of the retaining gasket is reserved on one side of the component B far away from the component A, and the shape and the size of the notch are matched with the retaining gasket;

(2) the screw rod part of the eccentric bolt penetrates through the mounting hole A and then is screwed out along the mounting hole B;

(3) pressing the retaining gasket into the notch, and sleeving the retaining gasket on the screw part of the eccentric bolt; one end of the protruding part of the retaining gasket faces outwards, and the protruding part of the retaining gasket is annular;

(4) the existing grinding tool is matched with the eccentric bolt, the outer diameter of a grinding head of the grinding tool is the same as that of a boss part of the locking bolt or the locking nut, and the part of the grinding head of the grinding tool, which is overlapped with the boss part of the retaining gasket, is ground to form the C-shaped bayonet;

(5) and screwing the locking bolt or the locking nut and the eccentric bolt, and clamping the locking bolt or the locking nut into the C-shaped bayonet, so that the eccentric bolt and the locking bolt or the locking nut are in a locking state.

Compared with the prior art, the invention has the advantages that:

(1) the invention discloses an eccentric anti-loosening screw, which is characterized in that an inner nut or an extension bolt deviating from an axis is additionally arranged at one end of a screw rod part according to the centrifugal motion principle, and a matched locking bolt or locking nut is connected and installed, so that the axial movable radius of one end of the screw rod part is changed, and the friction force of a connecting pair is increased.

(2) According to the invention, the outer wall of the screw part is provided with the right-handed screw thread, and the locking bolt or the locking nut is provided with the left-handed screw thread, so that under a mechanical high-frequency vibration state, the screw part can generate an axial force towards the tightening piece, and the locking bolt or the locking nut can generate an axial force towards the screw part, so that the locking bolt or the locking nut and the screw part are in a more biting state, and therefore, the overall strength of the connection pair can be ensured by adopting the reverse screw thread arrangement mode.

(3) According to the invention, the screw rod part is sleeved with the retaining piece, the side of the retaining piece, which faces the screwing piece, is provided with the protruding part, the C-shaped bayonet is arranged at the abutting part of the protruding part and the locking bolt or the locking nut, and the locking bolt or the locking nut is clamped into the C-shaped bayonet in a locking state, so that the displacement of the locking bolt or the locking nut is limited, the locking of the connection pair is firmer and more stable, and the connection pair is not easy to loosen.

(4) According to the invention, the toothed bulge is arranged on one side of the locking bolt or the locking nut, which faces the retaining piece, so that the friction force of the contact surface of the locking bolt or the locking nut and the retaining piece can be effectively increased, the screwed piece is more difficult to displace in a locking state, and the connection stability of the connection pair is further enhanced.

In summary, when the machine on which the connection pair is installed is in a high-frequency vibration state, due to the existence of the outward force of the connection pair in the axial direction, the high-frequency vibration enables the bolt and the locking bolt or the locking nut to be more closely gripped; the toothed projection at the end part of the locking bolt or the locking nut further increases the friction force of the contact surface of the locking bolt or the locking nut and the backstop piece; the C-shaped bayonet can prevent the locking bolt or the locking nut from rotating and deviating, and the connecting pair disclosed by the invention is more firm and stable in locking under the multiple actions.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural view of a connection pair according to embodiment 1;

FIG. 2 is an enlarged schematic view of the retaining washer of embodiment 1;

FIG. 3 is an enlarged view showing the state of mounting a locking bolt and a check washer in accordance with embodiment 1;

FIG. 4 is an enlarged view of the locking bolt and the retaining washer of embodiment 1;

FIG. 5 is an enlarged schematic structural view of a back stop nut according to embodiment 2;

FIG. 6 is a schematic structural view of a connection pair according to embodiment 3;

fig. 7 is an enlarged schematic structural view of a lock nut of embodiment 3;

FIG. 8 is an enlarged view showing a state in which a lock nut and a back-stop washer according to embodiment 3 are mounted;

FIG. 9 is an installation diagram of embodiment 1;

FIG. 10 is an installation diagram of embodiment 3;

reference numerals:

100. an eccentric bolt; 110. a screw section; 111. an external thread I; 120a, an inner nut; 120a-1, internal threads I; 120b, extension bolts; 120b-1, external thread III; 130. a nut;

200. locking the bolt; 210. a flange part I; 220. a boss portion I; 230. A bolt portion; 231. an external thread II;

300. a backstop member; 310. a boss portion; 320. a C-shaped bayonet; 330. an internal thread II;

400. a lock nut; 410. a flange part II; 420. a boss portion II; 421. a dentate bulge II; 430. a nut portion; 431. an internal thread III;

500. a component A; 510. a mounting hole A;

600. a component B; 610. a mounting hole B; 620. and an internal thread IV.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in fig. 1-4, an anti-loosening connecting pair comprises an eccentric bolt (100), a locking bolt (200) and a retaining piece (300), wherein the retaining piece (300) is a thrust gasket, the eccentric bolt (100) comprises a screw rod part (110) and an inner nut (120 a), the retaining gasket is sleeved on the screw rod part (110), the inner nut (120 a) is a groove arranged at one end of the screw rod part (110), and the central axis of the screw rod part (110) and the central axis of the inner nut (120 a) are not on the same straight line. The locking bolt (200) is coaxially provided with a flange part I (210), a boss part I (220) and a bolt part (230) which are sequentially connected, and the bolt part (230) is in threaded connection with the inner nut (120 a).

The screw rod is characterized in that an external thread I (111) is arranged on the outer wall of the screw rod part (110), the external thread I (111) is a right-handed thread, an internal thread I (120 a-1) is arranged on the inner wall of the inner nut (120 a), the internal thread I (120 a-1) is a left-handed thread, and the external thread I (111) and the internal thread I (120 a-1) are opposite in turning direction. And an external thread II (231) which has the same screwing direction as the internal nut (120 a) is arranged on a bolt part (230) of the locking bolt (200), and the external thread II (231) is also a left-handed thread. Because the screw part (110) of the eccentric bolt (100) is opposite to the screwing direction of the inner nut (120 a), the axial outward force generated by loosening the connecting pair under the mechanical high-frequency vibration can well prevent the loosening of the connecting pair by utilizing the interaction of the outward force.

The backstop gasket is sleeved on the screw part (110) of the eccentric bolt (100) through interference fit. The stopping gasket orientation one side of boss portion I (220) is equipped with bellying (310), be equipped with C type bayonet socket (320) on bellying (310), the boss portion I (220) of locking bolt (200) with the stopping gasket supports and blocks into in C type bayonet socket (320). When the locking bolt (200) is screwed with the eccentric bolt (100), due to the eccentric design of the inner nut (120 a) in the screw part (110), the boss part I (220) of the locking bolt (200) is partially overlapped when abutted against the boss part (310) of the retaining gasket, and the overlapped part is ground flat to form the C-shaped bayonet (320). The design of the retaining washer is often applied to mechanical parts which are themselves provided with an internal thread arrangement.

The locking bolt (200) with eccentric bolt (100) are in under the state of screwing (i.e. boss portion I (220) support and lean on at the stopping gasket department), boss portion I (220) of locking bolt (200) are gone into extremely in C type bayonet socket (320), because the existence of the vice outside power of axial of C type bayonet socket (320) and connection, connect vice in the locking state. Especially, when the machine is in a high-frequency vibration state, the connection pair is more firmly locked by the axial outward force.

One side of the boss part I (220) of the locking bolt (200) facing the retaining gasket is provided with a dentate bulge I (not shown in the figure) so as to increase the friction force of the contact surface of the boss part I (220) and the retaining gasket, and the connecting pair is not easy to loosen in a mechanical high-frequency vibration state. In addition, in order to improve the connection effect of the connection pair, the composite coagulant is injected into the groove, so that the overall strength and stability of the connection pair can be further improved. The eccentric bolt (100) further comprises a nut (130), wherein the nut (130) is positioned at one end far away from the inner nut (120 a) or the extension bolt (120 b), and the nut is installed in a movable installation mode (namely, the nut (130) is blocked).

Example 2

What is different from embodiment 1 is that, as shown in fig. 5, an anti-loosening connecting pair comprises an eccentric bolt (100), a locking bolt (200) and a stopping piece (300), the stopping piece (300) is a stopping nut, the eccentric bolt (100) comprises a screw rod part (110) and an inner nut (120 a), the stopping nut is sleeved on the screw rod part (110), the inner nut (120 a) is a groove arranged at one end of the screw rod part (110), and the central axis of the screw rod part (110) is not on the same straight line as the central axis of the inner nut (120 a). The locking bolt (200) is coaxially provided with a flange part I (210), a boss part I (220) and a bolt part (230) which are sequentially connected, and the bolt part (230) is in threaded connection with the inner nut (120 a).

Be equipped with external screw thread I (111) on the outer wall of screw rod portion (110), external screw thread I (111) are right-handed screw, be equipped with on the stopping nut with screw rod portion (110) revolve to the same internal thread II (330), internal thread II (330) are right-handed screw. An internal thread I (120 a-1) is arranged on the inner wall of the inner nut (120 a), the internal thread I (120 a-1) is a left-handed thread, and the screwing directions of the external thread I (111) and the internal thread I (120 a-1) are opposite. And an external thread II (231) which has the same screwing direction as the internal nut (120 a) is arranged on a bolt part (230) of the locking bolt (200), and the external thread II (231) is also a left-handed thread. Because the screw part (110) of the eccentric bolt (100) is opposite to the screwing direction of the inner nut (120 a), the axial outward force generated by loosening the connecting pair under the mechanical high-frequency vibration can well prevent the loosening of the connecting pair by utilizing the interaction of the outward force.

The stopping nut moves towards one side of boss portion I (220) is equipped with bellying (310), be equipped with C type bayonet socket (320) on bellying (310), the boss portion I (220) of locking bolt (200) with the stopping nut supports and blocks into in C type bayonet socket (320). When the locking bolt (200) is screwed with the eccentric bolt (100), due to the eccentric design of the inner nut (120 a) in the screw part (110), the boss part I (220) of the locking bolt (200) is partially overlapped when abutted against the boss part (310) of the retaining nut, and the overlapped part is ground flat to form the C-shaped bayonet (320). The design of the retaining nut is often applied to mechanical parts which are not provided with internal threads per se.

The locking bolt (200) with eccentric bolt (100) are in under the state of screwing (i.e. boss portion I (220) support and lean on at stopping nut department), boss portion I (220) of locking bolt (200) are gone into extremely in C type bayonet socket (320), because the existence of the vice outside power of axial of C type bayonet socket (320) and connection, connect vice in the locking state. Especially, when the machine is in a high-frequency vibration state, the connection pair is more firmly locked by the axial outward force.

One side of the boss part I (220) of the locking bolt (200) facing the retaining nut is provided with a dentate bulge I so as to increase the friction force of the contact surface of the boss part I (220) and the retaining nut and ensure that the connecting pair is not easy to loosen in a mechanical high-frequency vibration state. In addition, in order to improve the connection effect of the connection pair, the composite coagulant is injected into the groove, so that the overall strength and stability of the connection pair can be further improved. Compared with the movable mounting method (i.e. the blocking of the nut), in embodiment 1, the nut (not shown) is not arranged on the screw portion (110), and the arrangement can be used for the fixed mounting method of the connection pair.

Example 3

What is different from embodiment 1 is that, as shown in fig. 6-8, an anti-loosening connecting pair comprises an eccentric bolt (100), a lock nut (400) and a stopping piece (300), the stopping piece (300) is a stopping gasket, the eccentric bolt (100) comprises an integrated screw rod part (110) and an extension bolt (120 b), the stopping gasket is sleeved on the screw rod part (110), and the central axis of the screw rod part (110) and the central axis of the extension bolt (120 b) are not on the same straight line. The locking nut (400) comprises a flange part II (410), a boss part II (420) and a nut part (430) which are coaxially arranged, the nut part (430) penetrates through the axial centers of the flange part II (410) and the boss part II (420), and the nut part (430) is in threaded connection with the extension bolt (120 b).

The backstop gasket is sleeved on the screw part (110) of the eccentric bolt (100) through interference fit. And an external thread I (111) is arranged on the outer wall of the screw rod part (110), and the external thread I (111) is a right-hand thread. The outer wall of the extension bolt (120 b) is provided with an external thread III (120 b-1), the rotating directions of the external thread I (111) and the external thread III (120 b-1) are opposite, and the external thread III (120 b-1) is a left-hand thread. An internal thread III (431) which is in the same screwing direction as the extension bolt (120 b) is arranged in the locking nut (400), and the internal thread III (431) is a left-hand thread. The screw part (110) of the eccentric bolt (100) is opposite to the screwing direction of the extension bolt (120 b), so that the axial outward force generated by loosening the connecting pair under the mechanical high-frequency vibration can be used for well preventing the loosening of the connecting pair.

The stopping gasket orientation one side of boss portion II (420) is equipped with bellying (310), be equipped with C type bayonet socket (320) on bellying (310), the boss portion II (420) of lock nut (400) with the stopping gasket supports and blocks into in C type bayonet socket (320). One side of the boss part II (420) of the locking nut (400) facing the retaining gasket is provided with a dentate bulge II (421) so as to increase the friction force of the contact surface of the boss part and the retaining nut and ensure that the connecting pair is not easy to loosen in a mechanical high-frequency vibration state.

When the locking nut (400) and the eccentric bolt (100) are screwed together, due to the eccentric design of the extension bolt (120 b) and the screw part (110), the extended boss part II (420) is partially overlapped when being abutted with the boss part (310) of the retaining gasket, and the overlapped part is ground flat to form the C-shaped bayonet (320). The design of the retaining washer is often applied to mechanical parts which are themselves provided with an internal thread.

Example 4

What is different from embodiment 1 is that an anti-loosening connecting pair comprises an eccentric bolt (100), a locking nut (400) and a stopping piece (300), wherein the stopping piece (300) is a thrust gasket, the eccentric bolt (100) comprises an integrated screw rod part (110) and an extension bolt (120 b), the stopping nut is sleeved on the screw rod part (110), and the central axis of the screw rod part (110) and the central axis of the extension bolt (120 b) are not on the same straight line. The locking nut (400) comprises a flange part II (410), a boss part II (420) and a nut part (430) which are coaxially arranged, the nut part (430) penetrates through the axial centers of the flange part II (410) and the boss part II (420), and the nut part (430) is in threaded connection with the extension bolt (120 b).

And an external thread I (111) is arranged on the outer wall of the screw rod part (110), and the external thread I (111) is a right-hand thread. The stopping nut is provided with an internal thread II which is in the same direction as the screw rod part (110), and the internal thread II is a right-hand thread. The outer wall of the extension bolt (120 b) is provided with an external thread III (120 b-1), the rotating directions of the external thread I (111) and the external thread III (120 b-1) are opposite, and the external thread III (120 b-1) is a left-hand thread. An internal thread III (431) which is in the same screwing direction as the extension bolt (120 b) is arranged in the locking nut (400), and the internal thread III (431) is a left-hand thread. The screw part (110) of the eccentric bolt (100) is opposite to the screwing direction of the extension bolt (120 b), so that the axial outward force generated by loosening the connecting pair under the mechanical high-frequency vibration can be used for well preventing the loosening of the connecting pair.

The stopping nut moves towards one side of boss portion II (420) is equipped with bellying (310), be equipped with C type bayonet socket (320) on bellying (310), boss portion II (420) of locking nut (400) with the stopping nut supports and blocks into in C type bayonet socket (320). One side of the boss part II (420) of the locking nut (400) facing the retaining nut is provided with a dentate bulge II so as to increase the friction force of the contact surface of the boss part and the retaining nut and ensure that the connecting pair is not easy to loosen in a mechanical high-frequency vibration state.

When the locking nut (400) and the eccentric bolt (100) are screwed together, due to the eccentric design of the extension bolt (120 b) and the screw part (110), the extended boss part II (420) and the boss part (310) of the retaining nut are partially overlapped when abutting, and the overlapped part is ground flat to form the C-shaped bayonet (320).

A method of installing the coupling pair of embodiments 1 (shown in fig. 9) and 3 (shown in fig. 10), comprising the steps of:

(1) a component A (500) and a component B (600) which need to be provided with a connecting pair on a high-frequency vibration machine are respectively provided with a mounting hole A (510) and a mounting hole B (610), the inner wall of the mounting hole B (610) is provided with an internal thread IV (620) which has the same thread turning direction with the outer wall of the screw rod part (110), a notch for limiting the deviation of the retaining gasket is reserved on one side of the component B (600) far away from the component A (500), and the shape and the size of the notch are matched with the retaining gasket;

(2) the screw part (110) of the eccentric bolt (100) passes through the mounting hole A (510) and then is screwed out along the mounting hole B (610);

(3) pressing the retaining gasket into the notch, and sleeving the retaining gasket on the screw part (110) of the eccentric bolt (100); one end of the bulge (310) of the retaining gasket faces outwards, and the bulge (310) of the retaining gasket is annular;

(4) the existing grinding tool is matched with the eccentric bolt (100), the grinding head of the grinding tool has the same outer diameter as the boss part of the locking bolt (200) or the locking nut (400), and the part of the grinding head of the grinding tool, which is overlapped with the boss part (310) of the retaining gasket, is ground to form the C-shaped bayonet (320);

(5) and (2) screwing the locking bolt (200) or the locking nut (400) and the eccentric bolt (100), and clamping the locking bolt (200) or the locking nut (400) into the C-shaped bayonet (320), so that the eccentric bolt (100) and the locking bolt (200) or the locking nut (400) are in a locking state.

When the connection pair is in a locking state and the machine is in a high-frequency vibration state, due to the existence of axial outward force of the connection pair, the high-frequency vibration of the machine enables the screw part (110) to move towards the direction of the locking bolt (200) or the locking nut (400) and enables the locking bolt (200) or the locking nut (400) to move towards the direction of the backstop piece (300), so that the locking bolt (200) or the locking nut (400) and the backstop piece (300) (or the screw part (110)) are enabled to be closer to locking; the toothed bulge at the end part of the locking bolt (200) or the locking nut (400) further increases the friction force of the contact surface of the locking bolt and the retaining piece (300); the C-shaped bayonet (320) can prevent the locking bolt (200) or the locking nut (400) from rotating and deviating, and the locking of the connecting pair is firmer and more stable under multiple actions. If the connecting pair needs to be disassembled, the machine is in a closed and static state, the locking nut (400) and the backstop piece (300) are manually rotated to be separated from the C-shaped bayonet (320), and then the connecting pair is continuously rotated and disassembled.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The utility model provides a locking connection is vice which characterized in that: the eccentric bolt comprises a screw rod part and an inner nut, the backstop piece is sleeved on the screw rod part, the inner nut is a groove formed in one end of the screw rod part, and the central axis of the screw rod part and the central axis of the inner nut are not on the same straight line; the locking bolt is coaxially provided with a flange part I, a boss part I and a bolt part which are sequentially connected, and the bolt part is in threaded connection with the inner nut; stopping piece orientation one side of boss portion I is equipped with the bellying, be equipped with C type bayonet socket on the bellying, the boss portion I of locking bolt with stopping piece supports and block in the C type bayonet socket.

2. The anti-loosening joint pair according to claim 1, wherein: an external thread I is arranged on the outer wall of the screw rod part, an internal thread I is arranged on the inner wall of the internal nut, and the screwing directions of the external thread I and the internal thread I are opposite; and the bolt part is provided with an external thread II with the same spiral direction as the internal nut.

3. The anti-loosening joint pair according to claim 2, wherein: the external thread I is a right-handed thread, the internal thread I is a left-handed thread, and the external thread II is a left-handed thread; one side of the boss part I of the locking bolt, which faces the backstop piece, is provided with a dentate bulge.

4. The utility model provides a locking connection is vice which characterized in that: an anti-loosening connecting pair comprises an eccentric bolt, a locking nut and a retaining piece, wherein the eccentric bolt comprises an integrated screw rod part and an extending bolt; the locking nut comprises a flange part II, a boss part II and a nut part which are coaxially arranged, the nut part is arranged at the axle center of the flange part II and the boss part II in a penetrating way, and the nut part is in threaded connection with the extension bolt; stopping piece orientation one side of boss portion II is equipped with the bellying, be equipped with C type bayonet socket on the bellying, locking nut's boss portion II with stopping piece supports and blocks into in the C type bayonet socket.

5. The anti-loosening joint pair according to claim 4, wherein: an external thread I is arranged on the outer wall of the screw rod part, an external thread III is arranged on the outer wall of the extension bolt, and the rotating directions of the external thread I and the external thread III are opposite; and an internal thread III which is the same as the screwing direction of the extension bolt is arranged in the locking nut.

6. The anti-loosening joint pair according to claim 5, wherein: the external thread I is a right-handed thread, the external thread III is a left-handed thread, and the internal thread III is a left-handed thread; one side of the boss part II of the locking bolt, which faces the backstop piece, is provided with a dentate bulge.

7. The anti-loosening connection pair according to claim 2 or 5, wherein: the stopping piece is a stopping nut, and an internal thread II which has the same rotating direction with the screw rod part is arranged on the stopping nut.

8. The anti-loosening connection pair according to claim 2 or 5, wherein: the check piece is a check gasket which is sleeved on the screw part of the eccentric bolt through interference fit.

9. The anti-loosening joint pair according to any one of claims 1 to 6, wherein: the eccentric bolt further comprises a nut located at an end remote from the inner nut or the extension bolt.

10. A method of installing a connection pair, comprising the steps of: