Self-locking fastener

Abstract

The utility model discloses a self-locking fastener which comprises a screw rod, one end of the screw rod is detachably connected with a conical drill bit, a plurality of vertical clamping grooves are formed in the end, close to the drill bit, of the screw rod, a clamping rod is hinged to the end, close to the drill bit, in each clamping groove, and a spring is connected to the end, away from the drill bit, in each clamping groove. The outer ends of the springs are connected with the corresponding clamping rods, the clamping rods are ejected out of the clamping grooves through elastic force of the springs, the clamping rods can be completely hidden in the clamping grooves by extruding the springs, the end, away from the drill bit, of the screw is fixedly connected with a handle, and a nut is in threaded connection with the portion, between the clamping grooves and the handle, of the screw. And a driving mechanism for simultaneously pulling all the clamping rods to rotate into the clamping grooves is arranged in the screw rod. According to the fastener, an object and an object with a cavity can be fixed together from inside and outside, self-locking is achieved, and looseness is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to fastener technical field, concretely is a self-locking fastener. BACKGROUND

[0002] Fasteners are used to fix objects so that the objects remain stable. When installing an object on an object having a cavity, such as connecting the object on a pipe, the object needs to be fixed on the pipe by a screw. But after the screw is inserted into the pipe, it is difficult to install a nut on the inner end of the screw rod, so that it is difficult to fix the screw rod from the inside of the pipe, which causes the screw rod to loosen over time, resulting in unstable installation of the object. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model provides a self-locking fastener to solve the problems mentioned in the background.

[0004] To solve the above technical problems, the utility model provides the following technical scheme:

[0005] A self-locking fastener, comprising a screw rod, one end of the screw rod is detachably connected with a drill bit in a conical shape, a plurality of vertical clamping grooves are formed on one end of the screw rod close to the drill bit, a clamping rod is hingedly connected to one end of each clamping groove close to the drill bit, a spring is connected to one end of each clamping groove away from the drill bit, the outer end of the spring is connected to the corresponding clamping rod, the clamping rod is ejected from the clamping groove by the elastic force of the spring, the clamping rod can be completely hidden in the clamping groove by extruding the spring, a handle is fixedly connected to one end of the screw rod away from the drill bit, and a nut is threadedly connected to the screw rod between the clamping grooves and the handle; the screw rod is provided with a driving mechanism for simultaneously pulling all the clamping rods to rotate into the clamping grooves.

[0006] Preferably, the screw rod and the handle are provided with a vertical and communicating channel, a plurality of through holes communicating with the clamping grooves are formed on the upper end of the channel, the driving mechanism comprises a first pull rope connected to each clamping rod, a second pull rope arranged in the channel, and a bead connected to the outer end of the second pull rope, the first pull rope passes through the through holes and extends into the channel, and is connected to the second pull rope in the channel, and the diameter of the bead is greater than the diameter of the channel.

[0007] Through the above technical scheme, by pulling the bead, the bead pulls the clamping rod through the second pull rope and the first pull rope, so that the clamping rod is hidden in the clamping groove, and when the bead is released, the clamping rod is ejected from the clamping groove under the elastic force of the spring.

[0008] Preferably, an arc-shaped groove cooperating with the bead is arranged at the channel opening of the handle, and when the clamping rod is completely unfolded outward from the clamping groove under the elastic force of the spring, the bead abuts against the arc-shaped groove.

[0009] Through the technical scheme, when the spring is in a natural state, the lower end of the clamping rod is pushed out of the clamping groove, and when the clamping rod is fully unfolded, the first pull rope is pulled, the second pull rope is pulled by the first pull rope, and the bead body abuts against the arc-shaped groove, thereby preventing the bead body from being retracted into the channel so as to continue to pull the bead body next time.

[0010] Preferably, the screw rod is provided with a connecting groove at the end away from the handle, the connecting groove is provided with an internal spline, the drill bit is provided with an external spline at one end, a first screw hole is formed above the external spline on the drill bit, a second screw hole is formed in the upper end of the screw rod and communicated with the connecting groove, and the drill bit is fixed on the screw rod through the cooperation of the screw, the first screw hole and the second screw hole after the spline connection of the drill bit and the connecting groove.

[0011] Through the technical scheme, the screw rod and the drill bit are connected through the spline and the screw, the connection stability is improved, the drill bit is easy to replace, and the maintenance cost is saved.

[0012] Preferably, the screw rod is provided with a connecting groove at the end away from the handle, the connecting groove is provided with an internal spline, the drill bit is provided with an external spline at one end, a first screw hole is formed above the external spline on the drill bit, a second screw hole is formed in the upper end of the screw rod and communicated with the connecting groove, and the drill bit is fixed on the screw rod through the cooperation of the screw, the first screw hole and the second screw hole after the spline connection of the drill bit and the connecting groove.

[0013] Through the technical scheme, when the drill bit is spline-connected on the screw rod, the screw is inserted into the second screw hole and the first screw hole, the drill bit and the screw rod are further fixed through the screw, and the screw nut on the screw is hidden in the groove, so that the fixing of the screw on the object is prevented from being affected.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The holes are formed on the object with the cavity and the article, the drill bit is inserted along the hole, the hole extrudes the clamping rod in the process of insertion, the clamping rod is retracted into the clamping groove, the clamping rod is unfolded outward under the action of the spring after the clamping groove is completely inserted into the cavity, and then the nut is screwed until the nut is tightly pressed on the article, so that the article and the object with the cavity are fixed together from the inside and the outside, self-locking is realized, and loosening is effectively prevented. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the utility model;

[0017] Figure 2 It is a sectional view of the utility model;

[0018] Figure 3 It is Figure 2 a local enlarged view;

[0019] Figure 4 It is a use schematic view of the utility model;

[0020] In the figure: 1-screw, 2-drill bit, 3-clamping slot, 4-clamping rod, 5-spring, 6-handle, 7-nut, 8-channel, 9-through hole, 10-first pull rope, 11-second pull rope, 12-bead, 13-arcuate slot, 14-connection slot, 15-first screw hole, 16-second screw hole, 17-screw, 18-groove, 19-tube, 20-object. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] Embodiment 1

[0023] Please refer to Figures 1-3 A self-locking fastener, comprising a screw 1, one end of the screw 1 is detachably connected with a tapered drill bit 2. Specifically, the screw 1 is provided with a connection slot 14 at the end away from the handle, the connection slot 14 is provided with an internal spline, one end of the drill bit 2 is provided with an external spline, the drill bit 2 is provided with a first screw hole 15 above the external spline, the upper end of the screw 1 is provided with a second screw hole 16 communicating with the connection slot, after the spline connection of the drill bit 2 and the connection slot 14, the drill bit 2 is fixed on the screw 1 through the cooperation of the screw 17, the first screw hole 15 and the second screw hole 16. When installing the drill bit 2, spline-connect the drill bit 2 in the connection slot 14 of the screw 1, then screw the screw 17 into the second screw hole 16 and the first screw hole 15, and further fix the drill bit 2 and the screw 1 through the screw 17. The screw 1 and the drill bit 2 are connected by the double connection of spline and screw, which improves the connection stability, and also makes it easy to replace the drill bit, saving maintenance cost.

[0024] The screw rod 1 is provided with a plurality of vertical clamping slots 3 near the drill bit, each clamping slot 3 is hingedly connected with a clamping rod 4 near the drill bit, the outer end of a spring 5 is connected with the corresponding clamping rod 4, the clamping rod 4 is pulled out of the clamping slot 3 by the elastic force of the spring 5, the clamping rod 4 is completely hidden in the clamping slot 3 by extruding the spring 5, the end away from the drill bit of the screw rod 1 is fixedly connected with a handle 6, and the screw rod 1 is threadedly connected with a nut 7 between the clamping slots and the handle; the screw rod 1 is provided with a driving mechanism for simultaneously pulling all the clamping rods 4 to rotate into the clamping slots 3. The screw rod 1 and the handle 6 are provided with vertical and communicating channels 8, the upper end of the channel 8 is provided with a plurality of through holes 9 communicating with the clamping slots, the driving mechanism comprises a first pull rope 10 connected with each clamping rod, a second pull rope 11 arranged in the channel, and a bead 12 connected with the outer end of the second pull rope, the first pull rope 10 passes through the through hole 9 and extends into the channel 8 and is connected with the second pull rope 11 in the channel, and the diameter of the bead 12 is greater than that of the channel 8. The bead 12 is pulled, the bead 12 pulls the clamping rod 4 through the second pull rope 11 and the first pull rope 10, so that the clamping rod 4 is hidden in the clamping slot 3, and the clamping rod 4 is pulled out of the clamping slot 3 under the elastic force of the spring 5 when the bead 12 is loosened.

[0025] The handle 6 is provided with an arc-shaped groove 13 matched with the bead at the channel opening, the bead 12 is abutted in the arc-shaped groove 13 after the clamping rod 4 is completely unfolded outwards by the elastic force of the spring 5. When the spring 5 is in a natural state, the lower end of the clamping rod 4 is pushed out of the clamping slot 3, the first pull rope 10 is pulled when the clamping rod 4 is completely unfolded, the first pull rope 10 pulls the second pull rope 11 until the bead 12 is abutted in the arc-shaped groove 13, so that the bead 12 can be prevented from being retracted into the channel 8, so as to continue to pull the bead next time.

[0026] If Figure 4 The use method of the embodiment is shown in the figure.

[0027] When the workpiece 20 is installed on the object (such as the pipe 19) with a cavity, a hole is first formed on the pipe 19 and the workpiece 20, then the workpiece 20 is placed on the pipe 19 and the two drill holes are aligned, then the drill bit 2 is inserted along the hole, the hole extrudes the clamping rod 4 in the process of insertion, the clamping rod 4 is retracted into the clamping slot 3, the clamping rod 4 is unfolded outwards under the action of the spring 5 after the clamping slot 3 completely enters the pipe 19, the end of the clamping rod 4 is abutted on the inner wall of the pipe 19, then the nut 7 is screwed until the nut 7 is tightly pressed on the workpiece 20, so that the workpiece and the pipe are fixed together from the inside and outside of the pipe, self-locking is realized, and loosening can be effectively prevented.

[0028] When the screw rod 1 needs to be removed, the nut 7 is unscrewed reversely to make the nut 7 away from the workpiece 20, then the bead 12 is pulled to pull the clamping rod 4 through the second pull rope 11 and the first pull rope 10 to make the clamping rod 4 hide in the clamping groove 3, then the screw rod 1 is pulled out, the workpiece 20 and the pipe 19 can be separated, and the disassembly is convenient.

[0029] Embodiment 2

[0030] On the basis of the embodiment 1, a groove 18 is arranged on the screw rod 1 at the opening of the second screw hole, and the screw cap on the screw 17 hides in the groove 18. When the screw 17 fixes the drill bit 2 on the screw rod 1, the screw cap on the screw 17 hides in the groove 18, and the fixing of the screw to the object can be prevented.

[0031] It is to be understood that the terms "including", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0032] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A self-locking fastener characterized by: The utility model provides a kind of screw rod, the one end of screw rod (1) is detachably connected with the drill bit (2) of taper, and the one end of screw rod (1) is close to drill bit and is provided with multiple vertical clamping slots (3), the one end of each clamping slot (3) is hinged with clamping rod (4) close to drill bit, the one end of each clamping slot (3) is connected with spring (5) away from drill bit, the outer end of spring (5) is connected with corresponding clamping rod (4), and the clamping rod (4) is ejected from clamping slot (3) by the elastic force of spring (5), and the clamping rod (4) can be completely hidden in clamping slot (3) by extruding spring (5), the one end of screw rod (1) is fixedly connected with handle (6) away from drill bit, and nut (7) is threadedly connected on screw rod (1) between clamping slot and handle;The screw rod (1) is provided with driving mechanism for rotating all clamping rods (4) to the clamping slot (3) simultaneously.

2. A self-locking fastener according to claim 1 wherein: The vertical and communicating passageway (8) is arranged in the screw rod (1) and handle (6), a plurality of through holes (9) are formed in the upper end of the passageway (8) and communicated with the clamping slots, the driving mechanism comprises a first pull rope (10) connected to each clamping rod, a second pull rope (11) arranged in the passageway, and a bead (12) connected to the outer end of the second pull rope, the first pull rope (10) passes through the through holes (9) and extends into the passageway (8), and is connected to the second pull rope (11) in the passageway, and the diameter of the bead (12) is greater than the diameter of the passageway (8).

3. A self-locking fastener according to claim 2 wherein: An arc-shaped groove (13) matched with the bead is arranged at the passageway opening of the handle (6), and the bead (12) abuts against the arc-shaped groove (13) after the clamping rod (4) is completely unfolded outward from the clamping slot (3) by the elastic force of the spring (5).

4. A self-locking fastener according to claim 3 wherein: A connecting groove (14) is arranged at the end of the screw rod (1) away from the handle, an internal spline is arranged in the connecting groove (14), an external spline is arranged at one end of the drill bit (2), a first screw hole (15) is formed above the external spline on the drill bit (2), a second screw hole (16) communicated with the connecting groove is formed at the upper end of the screw rod (1), and the drill bit (2) is fixed on the screw rod (1) by cooperation of the screw (17), the first screw hole (15) and the second screw hole (16) after the spline connection of the drill bit (2) and the connecting groove (14).

5. A self-locking fastener according to claim 4 wherein: A recess (18) is arranged at the opening of the second screw hole on the screw rod (1), and the nut on the screw (17) is hidden in the recess (18).

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