CN207879812U - A kind of unidirectional self-tapping lock screw - Google Patents

Abstract

The utility model is related to a kind of unidirectional self-tapping lock screws, including threaded rod and nut, unidirectional groove is offered on the nut, there is the cross major trough of the cross end for positioning cross screwdriver in the unidirectional groove, the cross major trough has transverse groove and cannelure, the side of the transverse groove of the cross major trough and the both ends of cannelure in the clockwise direction is respectively provided with limited wall, and the side of the both ends of the transverse groove of the cross major trough and cannelure in the counterclockwise direction is respectively provided with the return short slot for being large enough to hold Phillips screwdriver convolution.In the utility model, due to being provided with anticlockwise return short slot in unidirectional groove, and it is then provided with the limited wall screwed in clockwise in the clockwise direction, therefore after Phillips screwdriver carries out screw-in installation to the screw of the utility model, it just can not be to operation that the screw is exited so that the screw of the utility model is from truly having achieved the effect that unidirectional screw-in installation.

Description

A kind of unidirectional self-tapping lock screw

Technical field

The utility model is related to the fastener of field of hardware more particularly to a kind of self-tapping lock screws unidirectionally installed.

Background technology

Those skilled in the art knows that, as the screw of primary fastener effect, application range almost covers institute The social productions field such as industrial, civilian having, however in special circumstances due to some, for example certain it is related to intellectual property, business The product of the requirements such as secret or some to store the anti-theft device product of valuables, often just need to be designed to Anti-dismantling Structure, for this demand in the market, the unidirectional self-tapping lock screw of our company's research and development just comes into being.

Invention content

The purpose of the utility model is to overcome the defects of the prior art, provide a kind of novel in design, simple in structure, tamper Anti-loosening unidirectional self-tapping lock screw.

To achieve the above object, the utility model uses a kind of unidirectional self-tapping lock screw, including threaded rod and nut, institute It states and offers unidirectional groove on nut, there is the cross master of the cross end for positioning cross screwdriver in the unidirectional groove Slot, the cross major trough have transverse groove and cannelure, and the transverse groove of the cross major trough and the both ends of cannelure are in up time The side in needle direction is respectively provided with limited wall, and the both ends of the transverse groove of the cross major trough and cannelure are in the counterclockwise direction Side be respectively provided be large enough to hold Phillips screwdriver convolution return short slot.In the present invention, on the threaded rod Screw thread forms angular thread, and the axle center of the center of the angular thread and the threaded rod forms concentric, and this helicitic texture can rise The effect of screw tap tapping can be directly threaded into i.e. that is, for the aperture hole position slightly smaller relative to the threaded rod with above-mentioned angular thread Can, and have locking function；In the utility model, to increase the bearing capacity of nut position, the bottom face fitting of the nut It is provided with ring flange；Meanwhile being acted on for the aid for increasing the screw lock of the utility model, have on the bottom face of the ring flange There are outer side edges edge and interior disk, which has inner circle outer edge, shape between the outer side edges edge and inner circle outer edge Circularize section, be provided in the annular section it is several within disk centre point centered on, annular array distribution it is anti- Loose tooth；For the structure of the utility model, the example as best embodiment aid effect, it is preferred that described locking Tooth have with the outer side edges along close to convex and tip part and from the convex and tip part, in a clockwise direction extend and with the flange The lozenges of the bottom face handing-over of disk；The edge of center of circle side on the lozenges, close to ring flange and inner circle outside Along handing-over；On the lozenges, at a distance in the arc-shaped shape in edge of the center of circle side of the ring flange.

By the unidirectional self-tapping lock screw to the improvement of the above-mentioned technical proposal of the prior art, the utility model reached with Lower three aspect advantageous effects：1, tamper：Due to being provided with anticlockwise return short slot in unidirectional groove, and in side clockwise To the limited wall for being then provided with to screw in clockwise, therefore when Phillips screwdriver carries out screw-in peace to the screw of the utility model It, just can not be to operation that the screw is exited after dress so that the screw of the utility model is from truly having reached unidirectional Screw in the effect of installation；2, ring screw in the prior art is substituted since the utility model uses angular thread structure, made The utility model screw under given conditions can voluntarily threaded through bores position without threaded screw thread again；3, locking teeth is set It sets, especially with the diagonal for the gradual slightly-inclined in direction to the lozenges structure intersected with ring flange plane of convex and tip part so that this reality It is easier to be pressed into the end face of fastening object (because being the point-to-area indentation side with convex and tip part with the locking teeth of novel screw Formula), and be not easy to loosen, it is fabulous to consolidate performance.

Description of the drawings

Fig. 1 is the front view of unidirectional self-tapping lock screw in the utility model.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the right view of Fig. 2.

Specific implementation mode

As shown in Figure 1-Figure 3, the present embodiment uses a kind of unidirectional self-tapping lock screw, including threaded rod 1 and nut 2, institute State and offer unidirectional groove 20 on nut 2, Fig. 1 combinations Fig. 2 it will be apparent that, have in the unidirectional groove 20 and be used for positioning cross screw The cross major trough 200 of the cross end of knife, which has transverse groove 200a and cannelure 200b, described The side of the both ends of the transverse groove 200a and cannelure 200b of cross major trough 200 in the clockwise direction is respectively provided with limited wall 2001, and the side difference of the both ends of the transverse groove 200a and cannelure 200b of the cross major trough 200 in the counterclockwise direction With the return short slot 201 for being large enough to hold Phillips screwdriver convolution, i.e., in the present embodiment, cross major trough 200 and return short slot 201 constitute unidirectional groove 20；In the present embodiment, further combined with Fig. 3 it will be apparent that, the screw thread on the threaded rod 1 is formed The axle center of angular thread, the center of the angular thread and the threaded rod 1 forms concentric, and this helicitic texture of the present embodiment can Play screw tap tapping, i.e., for the aperture hole position slightly smaller relative to the threaded rod 1, can be directly threaded into above-mentioned angular thread , and have locking function；Equally, it is shown in Fig. 1, Fig. 2 and Fig. 3, in the present embodiment, to increase 2 position of nut The bottom face fitting of bearing capacity, the nut 2 is provided with ring flange 3；Meanwhile for increase the present embodiment screw lock aid It acts on, has outer side edges along 30 and interior disk 31 on the bottom face of the ring flange 3, which has outside inner circle Along 310, the outer side edges form annular section between 30 and inner circle outer edge 310, be provided in the annular section it is several with Centered on the centre point of interior disk 31, annular array distribution locking teeth 32；Fig. 1 and figure are shown, specific to the present embodiment Structure for, the locking teeth 32 have with the outer side edges along 30 close to convex and tip part 320 and from the convex and tip part 320, the lozenges 321 for extending in a clockwise direction and joining with the bottom face of the ring flange 3；On the lozenges 321, lean on The edge of the center of circle side of nearly ring flange 3 joins with the inner circle outer edge 310；On the lozenges 321, at a distance in described The arc-shaped shape in edge of the center of circle side of ring flange 3.

The basic principles and main features and advantage of the utility model have been shown and described above.The technology people of the industry Member it should be appreciated that the present utility model is not limited to the above embodiments, the above embodiments and description only describe The principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model also have various changes Change and improve, these various changes and improvements fall within the scope of the claimed invention.The protection of the requires of the utility model Range is according to the attached claims and its equivalent thereof.

Claims (7)

1. a kind of unidirectional self-tapping lock screw, it is characterised in that：Including threaded rod and nut, offered on the nut unidirectional Slot, the interior cross major trough with the cross end for positioning cross screwdriver of the unidirectional groove, cross major trough tool There are transverse groove and cannelure, the side of the transverse groove of the cross major trough and the both ends of cannelure in the clockwise direction to have respectively There is limited wall, and the side of the both ends of the transverse groove of the cross major trough and cannelure in the counterclockwise direction is respectively provided with enough Accommodate the return short slot of Phillips screwdriver convolution.

2. a kind of unidirectional self-tapping lock screw according to claim 1, it is characterised in that：Screw thread shape on the threaded rod At angular thread, the axle center of the center of the angular thread and the threaded rod forms concentric.

3. a kind of unidirectional self-tapping lock screw according to claim 2, it is characterised in that：The bottom face of the nut is bonded It is provided with ring flange.

4. a kind of unidirectional self-tapping lock screw according to claim 3, it is characterised in that：On the bottom face of the ring flange With outer side edges edge and interior disk, which has inner circle outer edge, between the outer side edges edge and inner circle outer edge Form annular section, be provided in the annular section it is several within disk centre point centered on, annular array is distributed Locking teeth.

5. a kind of unidirectional self-tapping lock screw according to claim 4, it is characterised in that：The locking teeth have with it is described Outer side edges along close to convex and tip part and from the convex and tip part, in a clockwise direction extend and with the bottom face of the ring flange hand over The lozenges connect.

6. a kind of unidirectional self-tapping lock screw according to claim 5, it is characterised in that：On the lozenges, close to method The edge of the center of circle side of blue disk joins with the inner circle outer edge.

7. a kind of unidirectional self-tapping lock screw according to claim 6, it is characterised in that：On the lozenges, at a distance The arc-shaped shape in edge in the center of circle side of the ring flange.