CN212318455U - Magnetic drive temporary fastener - Google Patents

Abstract

The utility model relates to a magnetic drive temporary fastener, which comprises a pre-connection fastening mechanism and a magnetic drive mechanism, wherein the pre-connection fastening mechanism comprises a fastener body, a bolt and a clamping jaw; the bolt is rotatably arranged in the inner cavity of the fastener body; the clamping jaw is sleeved outside the bolt and is in threaded connection with the bolt; one end of the clamping jaw is matched with the shape of the inner cavity of the fastener body, so that the clamping jaw can be arranged in the inner cavity of the fastener body and can move along the axial direction but cannot move along the radial direction; the magnetic driving mechanism comprises an induction magnet, a driving magnet and a motor, the induction magnet is fixedly sleeved on the bolt, the driving magnet is fixedly connected with a crankshaft of the motor, and a magnetic action can be generated between the driving magnet and the induction magnet; when the motor drives the driving magnet to rotate, the driving magnet drives the induction magnet to rotate, and then the bolt and the clamping jaw move relatively.

Description

Magnetic drive temporary fastener

Technical Field

The utility model belongs to the technical field of the fastener, especially, relate to a temporary fastener of magnetic drive.

Background

The fastener is a general name of a type of mechanical parts adopted when two or more parts or components are fastened and connected into a whole, has different performance and purposes, and is a mechanical basic part which is most widely applied. In the industries of aviation industry and the like, for the assembly of thin-wall plate type components or large components such as a body shell and a wing of a metal material, pre-connection is an important link of the whole assembly process, the quality, the performance and even the service life of a product are directly determined by the result, and meanwhile, the precision and the appearance of the whole product are influenced by the fastening process.

The traditional pre-connection type mostly adopts a method of temporary fastening by a piercing clamp or fastening by a common bolt to position thin-wall plate assemblies, the power transmission mode is mechanical transmission, the two sides of the thin-wall plates need to be operated simultaneously, the assembly process is complex, the positioning precision is poor, the clamping force cannot be accurately controlled by manual judgment, the consistency of the clamping force is difficult to ensure, the automatic assembly cannot be realized, and the product quality and the assembly efficiency are influenced to a great extent.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims at overcoming prior art's is not enough, a magnetic drive temporary fastening spare is provided, it utilizes permanent magnetism transmission technical principle and helical drive principle, realize separating empty transmission power and unilateral loading and unloading operation, replace artifical tightening and two actions of unscrewing that realize the bolt, and then carry out fastening connection to two or more than two thin wall spare, structural design is ingenious, the assembling process has both been simplified, also avoided the inconsistent influence that manual installation brought, can realize rapid Assembly and quick dismantlement. The temporary fastening piece is put into, the problem of mounting the fastening piece can be effectively solved, so that the production efficiency and quality of products are improved, and the production cost is reduced.

The utility model discloses a realize through following technical scheme: a magnetic drive temporary fastener comprises a pre-connection fastening mechanism and a magnetic drive mechanism, wherein the pre-connection fastening mechanism comprises a fastener body, a bolt and a clamping jaw; the bolt is rotatably arranged in the inner cavity of the fastener body; the clamping jaw is sleeved outside the bolt and is in threaded connection with the bolt; one end of the clamping jaw is matched with the shape of the inner cavity of the fastener body, so that the clamping jaw can be arranged in the inner cavity of the fastener body and can move along the axial direction but cannot move along the radial direction; the magnetic driving mechanism comprises an induction magnet, a driving magnet and a motor, the induction magnet is fixedly sleeved on the bolt, the driving magnet is fixedly connected with a crankshaft of the motor, and a magnetic action can be generated between the driving magnet and the induction magnet; when the motor drives the driving magnet to rotate, the driving magnet drives the induction magnet to rotate, and then the bolt and the clamping jaw move relatively.

Compared with the prior art, the utility model discloses utilize permanent magnetism transmission technical principle, set up the response magnet and the driving magnet of two disalignments, when the driving magnet rotates, the response magnet also can rotate under the magnetic force effect, and then drives the bolt and rotate, has realized the transmission of contactless radial motion. And simultaneously, the utility model discloses based on the screw drive principle, set up the tight jack catch of clamp with bolt threaded connection, when the bolt rotates, because press from both sides tight jack catch restriction in the inner chamber of fastener body and can't take place radial motion, consequently, press from both sides tight jack catch and can take place axial displacement in the inner chamber, and then fasten two or the thin wall spare more than two temporarily. The utility model discloses utilize permanent magnetism transmission technical principle and helical transmission principle simultaneously, provide an automatic change interim fastener of installation, it has that positioning accuracy is high, the assembly degree of difficulty is little, the controllable characteristics of clamp force.

Furthermore, the clamping claw also comprises a clamping part and a distinguishing claw part, the clamping part is connected and communicated with the distinguishing claw part, the clamping part is provided with internal threads, and the bolt penetrates through the clamping part and the distinguishing claw part and is in threaded connection with the clamping part; the distinguishing claw part is a contractible and expansible hollow elastic structure. Because block portion can't rotate in the inner chamber of fastener body, when the bolt rotated in the normal position under the drive of response magnet, radial movement took place for block portion in the inner chamber of fastener body, and through the direction that sets up the screw thread, can make block portion be close to the bolt and remove, and then made the tip extrusion of bolt distinguish the claw and make its expansion to extrude the prefabricated hole, finally realize the fastening connection of two or more thin wall spare.

Furthermore, the clamping part is a multi-square clamping part, and the inner cavity of the fastener body is of a multi-square structure similar to the multi-square clamping part in shape. Because the clamping part and the inner cavity of the fastener body are in similar multi-square shapes, the clamping part cannot rotate and move in the same radial direction in the inner cavity of the fastener body.

Further, the device also comprises a clamping mechanism, and the clamping mechanism fixes the pre-connection fastening mechanism on the magnetic driving mechanism.

Further, the clamping mechanism comprises a shell, a clamping jaw and a control motor, the shell is fixedly arranged on the magnetic driving mechanism, and the clamping jaw is arranged outside the shell and used for clamping the fastener body; the control motor is connected with the clamping jaw and controls the opening angle of the clamping jaw. The fastener body is fixed by the clamping jaws and prevented from axial or radial play.

Further, the magnetic driving mechanism further comprises a shell, the shell is fixed with the shell, the shell is a non-magnetic shell, and the driving magnet and the motor are arranged inside the shell.

Furthermore, the pre-connection fastening mechanism further comprises a front end cover and a rear end cover, wherein the front end cover and the rear end cover are respectively arranged at two ends of the fastening piece body, so that an inner cavity of the fastening piece body forms a closed space; the head of the bolt is rotatably disposed on the rear end cover. The head of the bolt is rotatably mounted on the rear end cover, and when the bolt is driven by the induction magnet to rotate, the bolt only rotates in the original position and cannot axially displace.

Further, the pre-connection fastening mechanism further comprises a limiting piece, wherein the limiting piece is arranged on the rear end cover and surrounds the head of the bolt. The limiting piece can prevent the bolt from falling off.

Further, the magnetic driving mechanism further comprises a coupler, and the driving magnet is connected with a crankshaft of the motor through the coupler. The driving magnet provides a power source through the motor, and then drives the induction magnet to rotate through the magnetic force, so that the non-contact radial motion transmission is realized.

Further, the bolt is a hexagon socket head cap screw.

For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is an overall structure view of a magnetically driven temporary fastener according to an embodiment of the present invention;

FIG. 2 is a rear view of a magnetically driven temporary fastener in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a magnetically driven temporary fastener in accordance with an embodiment of the present invention;

fig. 4 is a partial structural view of a magnetically driven temporary fastener according to an embodiment of the present invention.

Description of the drawings:

10-a pre-connection fastening mechanism, 20-a magnetic driving mechanism, 30-a clamping mechanism, 11-a fastener body, 12-a front end cover, 13-a rear end cover, 14-a limiting shell, 15-a retainer ring, 16-a bolt, 171-a clamping part, 172-a distinguishing claw part, 21-an induction magnet, 22-a driving magnet, 23-a coupler, 24-a motor, 25-a shell, 31-a shell and 32-a clamping jaw.

Detailed Description

The utility model provides a magnetic drive temporary fastening piece please refer to simultaneously and show fig. 1 and fig. 2, including pre-connection fastening device 10, magnetic drive mechanism 20 and fixture 30, fixture 30 will pre-connection fastening device 10 is fixed on magnetic drive mechanism 20.

Referring to fig. 3, the pre-connection fastening mechanism 10 includes a fastener body 11, a front end cover 12, a rear end cover 13, a limiting member, a bolt 16 and a clamping jaw; the front end cover 12 and the rear end cover 13 are respectively arranged at the front end and the rear end of the fastener body 11, and an inner cavity is arranged inside the fastener body 11, so that the inner cavity forms a closed space.

The head of the bolt 16 is rotatably mounted on the rear end cover 13, so that a part of the screw of the bolt 16 is arranged in the inner cavity, and another part of the screw of the bolt 16 passes through the front end cover 12 and is exposed out of the fastener body 11; preferably, the bolt 16 is a hexagon socket head cap screw. The limiting part is used for preventing the bolt 16 from falling off from the rear end cover 13, and specifically, the limiting part includes a limiting shell 14 and a retainer ring 15, the limiting shell 14 is disposed on the rear end cover 13, an accommodating space is disposed inside the limiting shell 14, and an opening is disposed on the limiting shell 14, so that the head of the bolt 16 is disposed in the accommodating space, and the screw of the bolt 16 passes through the opening; the retainer ring 15 is disposed outside the opening to further prevent the bolt 16 from being removed from the stopper housing 14.

The clamping claw comprises a clamping part 171 and a distinguishing claw part 172, and the clamping part 171 is connected with and communicated with the distinguishing claw part 172; the engaging portion 171 is provided with an internal thread, the engaging portion 171 is disposed in the inner cavity of the fastener body 11, and the shape of the engaging portion 171 matches the cross-sectional shape of the inner cavity, in this embodiment, the cross-sectional shapes of the engaging portion 171 and the inner cavity are polygons, and the polygons are disposed so that the engaging portion 171 can move in the axial direction but cannot move in the radial direction in the inner cavity of the fastener body 11; preferably, the cross-sectional shapes of the engaging portion 171 and the inner cavity are two similar square shapes; the engaging portion 171 is disposed near the front end cover 12, and is sleeved on the bolt 16 to be in threaded connection therewith, that is, the bolt 16 passes through the engaging portion 171, so that the claw 172 is sleeved on the front end of the screw of the bolt 16 and exposed out of the fastener body 11; the distinguishing claw part 172 is a retractable and expandable hollow elastic structure with an orifice guiding function, and specifically, the distinguishing claw part 172 is an internally-retracted four-distinguishing claw or six-distinguishing claw structure with a tapered barb shape; when the bolt 16 is inserted into the top end of the claw recognizing part 172, the claw recognizing structure is pressed tightly and expanded, and when the bolt 16 is far away from the top end of the claw recognizing part 172, the claw recognizing structure is contracted and restored.

The magnetic driving mechanism 20 comprises an induction magnet 21, a driving magnet 22, a coupling 23, a motor 24 and a shell 25; the induction magnet 21 is arranged in the inner cavity of the fastener body 11, and the induction magnet 21 is fixedly sleeved on the bolt 16 and is positioned at the middle rear part of the bolt 16; the driving magnet 22 and the motor 24 are arranged in the shell 25, and the driving magnet 22 is fixedly connected with a crankshaft of the motor 24 through the coupling 23; the driving magnet 22 is disposed opposite to the induction magnet 21, preferably, the driving magnet 22 is disposed parallel to the induction magnet 21, so that a magnetic force can be generated between the driving magnet 22 and the induction magnet 21, and it should be noted that by adjusting the distance or the relative position between the axes of the driving magnet 22 and the induction magnet 21, the magnitude of the magnetic force between the driving magnet 22 and the induction magnet 21 can be changed; the housing 31 is preferably a non-magnetic housing, and the thickness thereof is set so as not to affect the magnetic force action between the driving magnet 22 and the induction magnet 21. When the motor drives the driving magnet to rotate, the driving magnet 22 drives the induction magnet to rotate under the action of magnetic force, so as to drive the bolt to rotate.

Further, referring to fig. 4, the clamping mechanism 30 includes a housing 31, a clamping jaw 32 and a control motor (not shown), the housing 31 is fixedly disposed above the casing 25 and is located at the rear of the casing 25, so that a vacant space for placing the fastener body 11 is reserved on the top surface of the casing 25; the clamping jaw 32 is arranged outside the shell 31, and the clamping jaw 32 can clamp the fastener body 11 on the top surface of the shell 25; the control motor is connected with the clamping jaw 32 and controls the opening angle of the clamping jaw 32; when the fastener body 11 is clamped and fixed, the induction magnet 21 in the inner cavity of the fastener body 11 is opposite to and parallel to the driving magnet 22 inside the shell 25, so that the transmission of magnetic force can be realized between the induction magnet 21 and the driving magnet 22, and finally, the non-contact type mechanical transmission between different shafts is realized.

When the fastener is installed and used, the clamping jaw clamps the fastener body to be positioned above the magnetic driving mechanism, and the exposed bolt and the clamping jaw in the pre-connection fastening mechanism are inserted into the prefabricated holes of the two thin-wall parts; the starter motor forward rotates, driving magnet forward rotates under the drive of motor, and simultaneously, the response magnet is at normal position forward rotation under driving magnet's magnetic force effect, and then drive the bolt and rotate, because the block portion threaded connection of bolt and clamping jaw, and the block portion restriction of clamping jaw is in the inner chamber of fastener body and can't take place radial motion, consequently, clamping jaw can take place axial displacement in the inner chamber, and then take place relative displacement with the bolt, the bolt can insert the top of distinguishing the claw portion of clamping jaw promptly, make it distinguish the claw structure and strut, and then extrude the inner wall in prefabricated hole, accomplish the clamp of two thin wall spare and fix. When dismantling, the starter motor antiport, driving magnet antiport under the drive of motor, and in the same way, the response magnet is at normal position antiport under driving magnet's magnetic force effect, and then drives the bolt and rotate, and at this moment, relative motion also can take place for bolt and clamping jaw, and the tip of bolt is kept away from the top that clamping jaw distinguished the claw, makes it distinguish claw structure shrinkage and reconversion, and two final thin wall spare can be by quick separation and dismantlement.

Compared with the prior art, the utility model discloses utilize permanent magnetism transmission technical principle, set up the response magnet and the driving magnet of two disalignments, when the driving magnet rotates, the response magnet also can rotate under the magnetic force effect, and then drives the bolt and rotate, has realized the transmission of contactless radial motion. And simultaneously, the utility model discloses based on the screw drive principle, set up the tight jack catch of clamp with bolt threaded connection, when the bolt rotates, because press from both sides tight jack catch restriction in the inner chamber of fastener body and can't take place radial motion, consequently, press from both sides tight jack catch and can take place axial displacement in the inner chamber, and then fasten two or the thin wall spare more than two temporarily. The utility model discloses utilize permanent magnetism transmission technical principle and helical transmission principle simultaneously, provide an automatic change interim fastener of installation, it has that positioning accuracy is high, the assembly degree of difficulty is little, the controllable characteristics of clamp force.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims (10)

1. A magnetically-driven temporary fastener characterized by: the device comprises a pre-connection fastening mechanism and a magnetic driving mechanism, wherein the pre-connection fastening mechanism comprises a fastener body, a bolt and a clamping jaw; the bolt is rotatably arranged in the inner cavity of the fastener body; the clamping jaw is sleeved outside the bolt and is in threaded connection with the bolt; one end of the clamping jaw is matched with the shape of the inner cavity of the fastener body, so that the clamping jaw can be arranged in the inner cavity of the fastener body and can move along the axial direction but cannot move along the radial direction; the magnetic driving mechanism comprises an induction magnet, a driving magnet and a motor, the induction magnet is fixedly sleeved on the bolt, the driving magnet is fixedly connected with a crankshaft of the motor, and a magnetic action can be generated between the driving magnet and the induction magnet; when the motor drives the driving magnet to rotate, the driving magnet drives the induction magnet to rotate, and then the bolt and the clamping jaw move relatively.

2. The magnetically-driven temporary fastener of claim 1, wherein: the clamping claw comprises a clamping part and a distinguishing claw part, the clamping part is connected and communicated with the distinguishing claw part, the clamping part is provided with internal threads, and the bolt penetrates through the clamping part and the distinguishing claw part and is in threaded connection with the clamping part; the distinguishing claw part is a contractible and expansible hollow elastic structure.

3. The magnetically-driven temporary fastener of claim 2, wherein: the clamping part is a multi-square clamping part, and the inner cavity of the fastener body is of a multi-square structure with the shape similar to that of the multi-square clamping part.

4. The magnetically-driven temporary fastener of claim 1, wherein: the pre-connecting and fastening mechanism is fixed on the magnetic driving mechanism by the clamping mechanism.

5. The magnetically-driven temporary fastener of claim 4, wherein: the clamping mechanism comprises a shell, a clamping jaw and a control motor, the shell is fixedly arranged on the magnetic driving mechanism, and the clamping jaw is arranged outside the shell and used for clamping the fastener body; the control motor is connected with the clamping jaw and controls the opening angle of the clamping jaw.

6. The magnetically-driven temporary fastener of claim 5, wherein: the magnetic driving mechanism further comprises a shell, the shell is fixed with the shell, the shell is a non-magnetic shell, and the driving magnet and the motor are arranged inside the shell.

7. The magnetically-driven temporary fastener of claim 1, wherein: the pre-connection fastening mechanism further comprises a front end cover and a rear end cover, wherein the front end cover and the rear end cover are respectively arranged at two ends of the fastener body, so that an inner cavity of the fastener body forms a closed space; the head of the bolt is rotatably disposed on the rear end cover.

8. The magnetically-driven temporary fastener of claim 7, wherein: the pre-connection fastening mechanism further comprises a limiting piece, wherein the limiting piece is arranged on the rear end cover and surrounds the head of the bolt.

9. The magnetically-driven temporary fastener of claim 8, wherein: the magnetic driving mechanism further comprises a coupler, and the driving magnet is connected with a crankshaft of the motor through the coupler.

10. The magnetically-driven temporary fastener of claim 1, wherein: the bolt is a hexagon socket head cap screw.

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