阅读说明：本技术 一种锁紧螺套 (Locking thread insert ) 是由 刘贲 余贵龙 王荣飞 勾红璋 刘磊 周山鹏 于 2021-02-07 设计创作，主要内容包括：本发明提供了一种锁紧螺套,包括内螺套和外螺套,外螺套套装在内螺套外,且外螺套与内螺套的配合面上设置有轴向弹性复位机构和周向限位机构,内螺套上设置有旋合结构,周向限位机构包括周向均布的若干沿轴向滑动配合的键槽结构,键槽结构分别设置在外螺套与内螺套上,旋合结构与对接端旋紧到位时,键槽结构错位至仅端部咬合,继续沿旋紧方向转动,键槽结构在端部导向结构的作用下在周向上相对转动并周期性错位干涉。本发明提供了一种锁紧螺套,在对接旋紧到位时,具备听觉和触觉识别功能,使盲插操作时更加方便、可靠,同时保证旋紧力矩适当,提高连接的可靠性及锁紧螺套的机械寿命。(The invention provides a locking screw sleeve which comprises an inner screw sleeve and an outer screw sleeve, wherein the outer screw sleeve is sleeved outside the inner screw sleeve, an axial elastic reset mechanism and a circumferential limiting mechanism are arranged on the matching surface of the outer screw sleeve and the inner screw sleeve, a screwing structure is arranged on the inner screw sleeve, the circumferential limiting mechanism comprises a plurality of key groove structures which are uniformly distributed in the circumferential direction and are in sliding fit along the axial direction, the key groove structures are respectively arranged on the outer screw sleeve and the inner screw sleeve, when the screwing structure and a butt joint end are screwed in place, the key groove structures are staggered to only be occluded at the end part and continue to rotate along the screwing direction, and the key groove structures are relatively rotated in the circumferential direction and are periodically staggered and interfered under the action of an end. The invention provides a locking screw sleeve which has the functions of auditory sense and tactile sense identification when in butt joint and screwing in place, so that blind plugging operation is more convenient and reliable, the screwing torque is appropriate, the connection reliability is improved, and the mechanical life of the locking screw sleeve is prolonged.)

1. A locking thread insert is characterized in that: the self-locking type nut screwing device comprises an inner nut (1) and an outer nut (2), wherein the outer nut (2) is sleeved outside the inner nut (1), an axial elastic resetting mechanism and a circumferential limiting mechanism are arranged on the matching surface of the outer nut (2) and the inner nut (1), a screwing structure is arranged on the inner nut (1), the circumferential limiting mechanism comprises a plurality of key groove structures which are uniformly distributed in the circumferential direction and are in sliding fit along the axial direction, the key groove structures are respectively arranged on the outer nut (2) and the inner nut (1), and the key groove structures are mutually meshed in the axial direction at the initial position; when the screwing structure is screwed and connected with the butt joint end, the elastic reset mechanism is compressed, and the key groove structure is staggered along the axial direction; when the screwing structure and the butt joint end are screwed in place, the key groove structure is staggered to only engage with the end part, the key groove structure continues to rotate along the screwing direction, and the key groove structure relatively rotates in the circumferential direction under the action of the end part guide structure and periodically collides in a staggered manner.

2. The lock nut as claimed in claim 1, wherein: the circumferential limiting mechanism comprises a second convex key (21) circumferentially arranged on the inner wall surface of the outer sleeve (2) and a first convex key (11) circumferentially arranged on the outer wall surface of the inner sleeve (1), the second convex key (21) and the first convex key (11) are axially meshed with each other in an initial state, and the second convex key (21) and the first convex key (11) are gradually separated along with the screwing of the inner sleeve (1) and the butt joint end; when the screwing structure is screwed in place, the second convex key (21) is meshed with only the end part of the first convex key (11), the end part of the second convex key (21) or the first convex key (11) is provided with a guide structure which can rotate in the circumferential direction relatively, and the elastic resetting mechanism still has compression allowance which meets the relative circumferential rotation between the second convex key (21) and the first convex key (11) along the screwing direction.

3. A lock nut as defined in claim 2, wherein: a chamfer (111) and a first limiting surface (112) are arranged on one side, facing the screwing direction, of the first convex key (11), a second limiting surface (113) is arranged on one side, facing the unscrewing direction, of the first convex key (11), when the screwing structure is screwed in place, the first limiting surface (112) and the second convex key (21) are completely staggered in the circumferential direction, and at least part of each of the chamfer (111) and the second limiting surface (113) is still overlapped with the second convex key (21) in the circumferential direction.

4. A lock nut as defined in claim 3, wherein: the second convex key (21) is provided with two circles at least, first convex key (11) is provided with two circles at least, and at least one circle of first convex key (11) is provided with chamfer (111), and second convex key (21) axial dimension and two adjacent circles of second convex key (21) interval, first convex key (11) axial dimension and two adjacent circles of first convex key (11) interval satisfy second convex key (21) and first convex key (11) can stagger completely in the axial.

5. The lock nut as claimed in claim 1, wherein: the elastic reset mechanism comprises a check ring (3) arranged at the tail part of the inner wall of the outer threaded sleeve (2), a hole shoulder arranged at the head part of the inner wall of the outer threaded sleeve (2), and a shaft shoulder arranged on the outer wall of the inner threaded sleeve (1), wherein the shaft shoulder is limited between the hole shoulder and the check ring (3), and a reset spring is arranged between the hole shoulder and the shaft shoulder.

6. The lock nut as claimed in claim 5, wherein: the reset spring is a plurality of wave-shaped gaskets (4), and adjacent wave-shaped gaskets (4) are isolated by gaskets (5).

7. The lock nut as claimed in claim 1, wherein: the screwing structure is a connecting thread or a spiral groove.

Technical Field

The invention belongs to the technical field of connectors, and particularly relates to a locking threaded sleeve.

Background

Along with the integration development of system equipment, its volume is littleer and littleer thereupon, and then the condition that the sight is sheltered from appears. As a key component in the system, the difficulty of the installation and mating operation of the electrical connector is increased. However, most of the conventional threaded connectors can only be judged whether to be in place by observing marks on the connectors through human eyes, once the sight is blocked, whether the connectors are in place cannot be judged, and the function of the screw sleeve is mainly used for preventing looseness.

Disclosure of Invention

In order to solve the technical problems, the invention provides the locking screw sleeve which has the functions of hearing and touch recognition when butt joint and screwing are in place, so that blind plugging operation is more convenient and reliable, connecting threads are protected, screwing torque is appropriate, connection reliability is improved, and the mechanical life of the locking screw sleeve is prolonged.

The invention is realized by the following technical scheme:

a locking threaded sleeve comprises an inner threaded sleeve and an outer threaded sleeve, wherein the outer threaded sleeve is sleeved outside the inner threaded sleeve, an axial elastic reset mechanism and a circumferential limiting mechanism are arranged on the matching surface of the outer threaded sleeve and the inner threaded sleeve, a screwing structure is arranged on the inner threaded sleeve, the circumferential limiting mechanism comprises a plurality of key groove structures which are uniformly distributed in the circumferential direction and are in sliding fit along the axial direction, the key groove structures are respectively arranged on the outer threaded sleeve and the inner threaded sleeve, and the key groove structures are mutually meshed in the axial direction at the initial position; when the screwing structure is screwed and connected with the butt joint end, the elastic reset mechanism is compressed, and the key groove structure is staggered along the axial direction; when the screwing structure and the butt joint end are screwed in place, the key groove structure is dislocated to only be occluded at the end part, the key groove structure continues to rotate along the screwing direction, the key groove structure rotates relatively in the circumferential direction under the action of the end part guide structure and periodically dislocates and interferes, an operator holds the outer sleeve to rotate, the outer sleeve drives the inner sleeve to rotate together under the action of the circumferential limiting mechanism in the screwing process, the locking screw sleeve is screwed or unscrewed, after the screwing is in place, the circumferential limiting mechanism fails when the external sleeve is continuously screwed, the slipping phenomenon is generated, the problems of vibration resistance, poor contact and the like caused by the fact that the connecting screw thread is damaged due to over-tight screwing or the connecting reliability is reduced due to over-loose screwing in blind plugging are avoided, the screwing structure is protected, meanwhile, the screwing torque is ensured to be proper, the connecting reliability is improved.

In order to realize that when the inner screw sleeve is screwed in place, the circumferential limiting mechanism has a limiting failure function along the screwing direction, the circumferential limiting mechanism comprises a second convex key and a first convex key, wherein the second convex key is circumferentially arranged on the inner wall surface of the outer screw sleeve, the first convex key is circumferentially arranged on the outer wall surface of the inner screw sleeve, the second convex key and the first convex key are axially mutually occluded in an initial state, and the second convex key and the first convex key are gradually separated along with the screwing of the inner screw sleeve and the butt joint end; when the screwing structure is screwed in place, the second convex key is only meshed with the end part of the first convex key, the end part of the second convex key or the end part of the first convex key is provided with a guide structure which can rotate in the circumferential direction relatively, and the elastic reset mechanism still has compression allowance to meet the relative circumferential rotation between the second convex key and the first convex key along the screwing direction.

The side of the first convex key facing the screwing direction is provided with a chamfer and a first limit surface, the side of the first convex key facing the screwing direction is provided with a second limit surface, when the screwing structure is screwed in place, the first limit surface and the second convex key are completely staggered in the circumferential direction, at least part of the chamfer and the second limit surface are still overlapped with the second convex key in the circumferential direction, when the external sleeve is screwed in place and continuously rotates along the screwing direction, the chamfer can guide the first convex key to continuously compress the elastic reset mechanism, further the elastic reset mechanism is rotated in the circumferential direction from the gap of the second convex key, the elastic reset mechanism rebounds under the action of elastic force at the next occlusion position to form intermittent interference to generate impact, intermittent 'click … …' sound can be generated by continuous rotation, the in-place auditory identification function is realized, and the reaction force generated during the impact is fed back to an operator to generate a tactile identification function, the blind plugging operation is more convenient and reliable; the outer screw sleeve can rotate along the unscrewing direction and can drive the inner screw sleeve to rotate, and then the operation of separation is realized.

The second convex key is provided with two circles at least, and first convex key is provided with two circles at least, has the first convex key of round at least and is provided with the chamfer, and second convex key axial dimension and two adjacent circles of second convex key interval, first convex key axial dimension and two adjacent circles of first convex key interval satisfy second convex key and first convex key can stagger completely in the axial, ensure that first convex key and second convex key can circumferential direction relatively.

The elastic reset mechanism comprises a check ring arranged at the tail part of the inner wall of the outer threaded sleeve, a hole shoulder arranged at the head part of the inner wall of the outer threaded sleeve and a shaft shoulder arranged on the outer wall of the inner threaded sleeve, the shaft shoulder is limited between the hole shoulder and the check ring, and a reset spring is arranged between the hole shoulder and the shaft shoulder.

The reset spring is a plurality of wave-shaped gaskets, and adjacent wave-shaped gaskets are isolated by gaskets, so that the stress is uniform and the support is stable.

The screwing structure is a connecting thread or a spiral groove.

The invention has the beneficial effects that:

compared with the prior art, after the plug and the socket are inserted in place, the outer screw sleeve can rotate (slip) relative to the inner screw sleeve by continuously screwing the locking screw sleeve, under the action of the elastic force of the waveform gasket, intermittent interference can be formed between the second convex key on the outer screw sleeve and the first convex key on the inner screw sleeve to generate impact, and intermittent 'clicking … …' sound can be generated by continuously rotating, so that the hearing recognition function of the plug and the socket in-place butting is realized, the reaction force generated during impact is fed back to an operator to generate a touch recognition function, the blind plugging operation is more convenient and reliable, the connecting threads are protected, the screwing torque is appropriate, the connection reliability is improved, and the mechanical life of the locking screw sleeve is prolonged.

Drawings

FIG. 1 is a partial cross-sectional view of a locking nut of the present invention when not tightened in place;

FIG. 2 is a partial cross-sectional view of the locking nut of the present invention when tightened in place;

FIG. 3 is an enlarged view of the structure at I in FIG. 2;

FIG. 4 is a schematic view of the construction of the inner insert of the present invention;

FIG. 5 is a schematic structural view of the outer jacket according to the present invention;

FIG. 6 is a schematic view of the locking nut of the present invention mounted on the plug;

fig. 7 is a schematic view of the plug and receptacle of the present invention after mating.

In the figure: 1-inner threaded sleeve, 2-outer threaded sleeve, 3-check ring, 4-waveform gasket, 5-gasket, 6-plug, 7-socket, 11-first convex key, 21-second convex key, 111-chamfer, 112-first limit surface and 113-second limit surface.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

As shown in fig. 1 to 5, a locking thread insert comprises an inner thread insert 1 and an outer thread insert 2, wherein the outer thread insert 2 is sleeved outside the inner thread insert 1, an axial elastic reset mechanism and a circumferential limiting mechanism are arranged on the matching surface of the outer thread insert 2 and the inner thread insert 1, a screwing structure is arranged on the inner thread insert 1, the circumferential limiting mechanism comprises a plurality of key groove structures which are uniformly distributed in the circumferential direction and are in sliding fit along the axial direction, the key groove structures are respectively arranged on the outer thread insert 2 and the inner thread insert 1, and the key groove structures are mutually meshed in the axial direction at the initial position; when the screwing structure is screwed and connected with the butt joint end, the elastic reset mechanism is compressed, and the key groove structure is staggered along the axial direction; when the screwing structure and the butt joint end are screwed in place, the key groove structure is staggered to only engage with the end part, the key groove structure continues to rotate along the screwing direction, and the key groove structure relatively rotates in the circumferential direction under the action of the end part guide structure and periodically interferes in a staggered manner.

As shown in fig. 1 to 5, the circumferential limiting mechanism includes a second convex key 21 circumferentially arranged on the inner wall surface of the outer sleeve 2 and a first convex key 11 circumferentially arranged on the outer wall surface of the inner sleeve 1, the second convex key 21 and the first convex key 11 are axially engaged with each other in an initial state, and the second convex key 21 and the first convex key 11 are gradually separated as the inner sleeve 1 is screwed with the butt end; when the screwing structure is screwed in place, the second convex key 21 is meshed with only the end part of the first convex key 11, the end part of the second convex key 21 or the end part of the first convex key 11 is provided with a guide structure which can rotate relatively in the circumferential direction, and the elastic resetting mechanism still has compression allowance to meet the relative circumferential rotation between the second convex key 21 and the first convex key 11 along the screwing direction when the connecting thread is screwed in place. The two adjacent first convex keys 11 correspond to a groove structure relative to the second convex key 21, and the first convex keys 11 and the second convex key 21 form a sliding fit key groove structure.

As shown in fig. 1 to 4, a chamfer 111 and a first limiting surface 112 are disposed on one side of the first convex key 11 facing the screwing direction, a second limiting surface 113 is disposed on one side of the first convex key 11 facing the unscrewing direction, and when the screwing structure is screwed in place, the first limiting surface 112 and the second convex key 21 are completely staggered in the circumferential direction, and at least part of each of the chamfer 111 and the second limiting surface 113 is still overlapped with the second convex key 21 in the circumferential direction.

As shown in fig. 1 to 5, the second convex key 21 has at least two circles, the first convex key 11 has at least two circles, at least one circle of the first convex key 11 has a chamfer 111, the axial dimension of the second convex key 21 is spaced from the second convex key 21 of two adjacent circles, and the axial dimension of the first convex key 11 is spaced from the first convex key 11 of two adjacent circles, so that the second convex key 21 and the first convex key 11 can be completely staggered in the axial direction.

As shown in fig. 6 and 7, the elastic reset mechanism comprises a retainer ring 3 mounted at the tail of the inner wall of the outer threaded sleeve 2, a hole shoulder arranged at the head of the inner wall of the outer threaded sleeve 2, and a shaft shoulder arranged on the outer wall of the inner threaded sleeve 1, wherein the shaft shoulder is limited between the hole shoulder and the retainer ring 3, and a reset spring is arranged between the hole shoulder and the shaft shoulder.

As shown in fig. 6 and 7, the return spring is a plurality of corrugated spacers 4, and adjacent corrugated spacers 4 are separated by a gasket 5.

As shown in fig. 6 and 7, the screwing structure is a connecting thread or a spiral groove.

As shown in fig. 4 and 5, in this embodiment, the first convex key 11 is provided with two circles, the two circles of the first convex keys 11 are different in axial dimension, and a larger circle of the first convex keys 11 is provided with a chamfer 111; in order to facilitate the processing of the second convex key 21 on the outer threaded sleeve 2, the second convex key 21 is provided with three circles, and the retainer ring 3 is arranged between the two circles of the second convex keys 21, so that the processing path shielding caused by independently arranging the mounting groove of the retainer ring 3 is avoided; the screwing structure is that the connecting thread is a standard connecting thread.

As shown in fig. 6 and 7, in this embodiment, the locking barrel is sleeved on the plug 6, the locking barrel includes an inner barrel 1 and an outer barrel 2, the outer barrel 2 is sleeved outside the inner barrel 1, an axial elastic reset mechanism is disposed on a fitting surface of the outer barrel 2 and the inner barrel 1, a screwing structure matched with the socket 7 is disposed on the inner barrel 1, the screwing structure is screwed with the socket 7 to drive the plug 6 and the socket 7 to be inserted or separated, a limit step is disposed on the socket 7, and the limit step abuts against the outer barrel 2 and compresses the elastic reset mechanism after the screwing structure is screwed with the butt end along a screwing direction for a certain distance. It is also possible to mount the locking nut on the socket 7 with the plug 6 at the mating end.

An operator holds the outer thread sleeve 2 to carry out rotary operation, the outer thread sleeve 2 drives the inner thread sleeve 1 to rotate together under the action of the circumferential limiting mechanism in the screwing process, the locking thread sleeve is screwed or unscrewed, after the locking thread sleeve is screwed in place, when the outer thread sleeve 2 continues to rotate along the screwing direction, the chamfer 111 can guide the first convex key 11 to continue to compress the elastic resetting mechanism, further the elastic resetting mechanism rotates in the circumferential direction from the gap of the second convex key 12 and rebounds under the action of elastic force at the next occlusion position to form intermittent interference to generate impact, intermittent 'click … …' sound can be generated by continuing to rotate, therefore, the hearing identification function of in-place butting is realized, the reaction force generated in impact is fed back to the operator to generate the touch identification function, and the problems of vibration resistance, poor contact and the like caused by the damage of a connecting thread screw thread due to over-tightening in blind plugging or the reduction of the connecting reliability due to over-screwing are avoided, the connecting thread is protected, the screwing torque is appropriate, the connecting reliability is improved, the mechanical life of the locking threaded sleeve is prolonged, and the blind plugging operation is more convenient and reliable; the outer thread sleeve 2 can rotate along the loosening direction and can drive the inner thread sleeve 1 to rotate, and then the separation operation is realized.