Self-tapping locking screw

Abstract

The utility model discloses a self-tapping locking screw, and particularly relates to the field of screws, the self-tapping locking screw comprises a screw rod, the top surface of the screw rod is provided with a nut, the middle part of the top surface of the nut is fixedly provided with an extension head, and the middle part of the top surface of the extension head is provided with a cross groove; the top end of the sleeve is positioned at the top of the extension head; the screw rod is sleeved with a first gasket and a second gasket, the first gasket is located at the bottom of the second gasket, the opposite faces of the first gasket and the second gasket are each provided with a plurality of clamping blocks which are connected in a clamped mode, and the opposite faces of the first gasket and the second gasket are each provided with a plurality of limiting blocks. The sleeve is arranged on the top face of the nut in a sliding mode, so that the tightness of connection between the screw and an electric drill can be enhanced, and the situation that the screw deviates or falls off in the screw fixing process is prevented; and the first gasket and the second gasket are arranged on the screw rod in a sleeving mode, the first gasket and the second gasket are connected in a clamped mode, the screw can be effectively prevented from loosening during vibration, and therefore the locking effect is guaranteed.

Description

TECHNICAL FIELD

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

[0002] Self -tapping locking screw refers to the self -tapping screw of not needing to cooperate nut use, and the tooth thread is self -tapping type, and reliable locking thread connection is formed in the hole by extrusion and is formed, is often used in the occasion that need to prevent loosening, such as electronic product, furniture, car, mechanical equipment etc., and its advantage lies in fixed firm, can reduce the use and maintenance cost of locking piece, improves work efficiency.

[0003] In order to improve installation efficiency, in the installation process of self -tapping locking screw, one side is matched with electric drill use, and the drill bit of electric drill has magnetic attraction to self -tapping locking screw, passes through electric drill and installs after the adsorption of self -tapping locking screw, however, due to the length, gravity and structural characteristics of self -tapping locking screw, lead to the deviation when fixing, not only influence fixing efficiency, and the self -tapping locking screw after fixing can also be deviated, thereby influence fixing effect, sometimes people will fix with hand, and this exists the security hidden danger that hand is easily hurt by electric drill, and when the fixed part vibrates, self -tapping locking screw still can be loose, influence fixing effect.

[0004] Therefore we make improvement to this, and propose a self -tapping locking screw. CONTENT OF UTILITY MODEL

[0005] In order to solve the above technical problem, the utility model provides the following technical scheme:

[0006] The utility model discloses a self -tapping locking screw, including screw rod, the top of screw rod is fixedly arranged with the nut, the top middle part of nut is fixedly arranged with the extension head, and the top middle part of extension head is equipped with cross groove;The sleeve is slidably arranged on the nut, and the top of sleeve is located at the top of extension head;The washer one and washer two are respectively set on the screw rod, the washer one is located at the bottom of washer two, and the opposite surface of washer one and washer two is respectively provided with a plurality of clamping blocks that are mutually clamped, and the opposite surface of washer one and washer two is respectively provided with a plurality of limiting blocks.

[0007] As a preferred technical scheme of the utility model, the diameter of the nut is greater than the diameter of the extension head, and the thickness of the nut is less than the thickness of the extension head.

[0008] As a preferred technical scheme of the utility model, the top of the nut is provided with an annular groove, and the sleeve is slidably connected with the annular groove.

[0009] As a preferred technical scheme of the utility model, the inner part of the sleeve is respectively provided with a round groove one and a round groove two, the round groove one is located at the top of the round groove two, and the diameter of the round groove one is smaller than the diameter of the round groove two.

[0010] As a preferred technical scheme of the utility model, the inner wall of the round groove one is slidably connected with the outer surface of the extension head, and the inner wall of the round groove two is slidably connected with the inner wall of the annular groove.

[0011] As a preferred technical scheme of the utility model, the surfaces of the clamping block and the limiting block are both inclinedly arranged, and the middle parts of the gaskets one and two are respectively provided with clamping grooves.

[0012] The utility model has the advantages of:

[0013] In the utility model, the sleeve arranged on the top surface of the nut can enhance the tightness of the connection between the screw and the electric drill, prevent the screw from deviating or falling during the fixing process, and the gaskets one and two are arranged on the screw rod and are clamped with each other, so that the screw can be effectively prevented from loosening during vibration, thereby ensuring the locking effect. DRAWINGS

[0014] The drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, are used together with the embodiments of the utility model to explain the utility model, and do not constitute the limitation of the utility model. In the drawings:

[0015] Figure 1 It is the structure schematic of the utility model one self -drilling locking screw Figure One ;

[0016] Figure 2 It is the structure schematic of the utility model one self -drilling locking screw Figure Two ;

[0017] Figure 3 It is the structure schematic of the utility model one self -drilling locking screw Figure Three ;

[0018] Figure 4 It is the structure schematic of the utility model one self -drilling locking screw Figure Four .

[0019] In the drawing: 1, screw rod;2, gasket one;3, gasket two;4, nut;5, sleeve;6, extension head;7, cross groove;8, annular groove;9, round groove one;10, round groove two;11, clamping groove;12, clamping block;13, limiting block. CONCRETE IMPLEMENTING METHOD

[0020] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described herein are only used for illustrating and explaining the utility model, and are not used for limiting the utility model.

[0021] Embodiment: as Figures 1 to 4 The utility model discloses a self -drilling locking screw, including screw rod 1, the top of screw rod 1 is fixedly arranged with the nut 4, the top middle part of nut 4 is fixedly arranged with the extension head 6, and the top middle part of extension head 6 is equipped with cross groove 7;Cross groove 7 cooperates with the existing electric drill bit, through the effect of electric drill, it is convenient to fix screw rod 1 in the inside of fixed object, improves the fixed efficiency;The setting of extension head 6, compared with traditional screw, its extension cross groove 7's depth, the contact area of electric drill bit and cross groove 7 is lengthened, thereby the stability of the whole screw and drill head connection is strengthened, prevents the screw from skewing when fixing.

[0022] The sleeve 5 is further arranged on the nut 4, and the top end of the sleeve 5 is located on the top of the extension head 6. The sleeve 5 further extends the contact area with the drill bit. The sleeve 5 makes the connection between the drill bit and the screw more secure. The drill bit of the electric drill is a magnetic drill bit, which can attract the nut 4 to prevent it from falling off.

[0023] The screw rod 1 is sleeved with a washer one 2 and a washer two 3, respectively. The washer one 2 is located at the bottom of the washer two 3. The opposite surfaces of the washer one 2 and the washer two 3 are respectively provided with a plurality of clamping blocks 12. The opposite surfaces of the washer one 2 and the washer two 3 are respectively provided with a plurality of limiting blocks 13. Before fixing the screw rod 1, the washer two 3 and the washer one 2 are sleeved on the surface of the screw rod 1. As the screw rod 1 enters the inside of the fixed object, the clamping blocks 12 on the washer one 2 and the washer two 3 are tightly clamped. The limiting blocks 13 on the washer one 2 and the washer two 3 can respectively increase the friction between the fixed object and the nut 4. When the fixed object shakes under external force, the washer one 2 and the washer two 3 can prevent the screw rod 1 from loosening, thereby ensuring the tightness of the connection and the firmness of the fixation.

[0024] The diameter of the nut 4 is greater than the diameter of the extension head 6, and the thickness of the nut 4 is less than the thickness of the extension head 6. The extension head 6 extends the connection path of the electric drill bit and the cross groove 7.

[0025] The top surface of the screw cap 4 is provided with an annular groove 8, the sleeve 5 is in sliding connection with the annular groove 8, and the sleeve 5 is magnetically attracted to the annular groove 8, so that when the electric drill bit rotates, the screw cap 4 can be driven to rotate, and the screw rod 1 is driven to rotate by the screw cap 4, and the screw rod 1 is driven to enter the inside of the fixed object by applying a force towards the fixed object, and after the screw rod 1 is fixed, the electric drill bit is separated from the cross groove 7, and the sleeve 5 can be removed; before fixing, the sleeve 5 can be connected with the corresponding screw cap 4, so that the efficiency during installation can be improved, and the sleeve 5 is arranged to prevent the screw rod 1 from deviating or falling during the fixing of the screw rod 1, thereby improving the fixing efficiency of the screw rod 1.

[0026] The inside of the sleeve 5 is respectively provided with a circular groove one 9 and a circular groove two 10, the circular groove one 9 is located at the top of the circular groove two 10, and the diameter of the circular groove one 9 is smaller than the diameter of the circular groove two 10, and the circular groove one 9 is matched with the extension head 6. The inner wall of the circular groove one 9 is in sliding connection with the outer surface of the extension head 6, and the inner wall of the circular groove two 10 is in sliding connection with the inner wall of the annular groove 8.

[0027] The surfaces of the clamping block 12 and the limiting block 13 are both inclined, and the inclinations of the clamping block 12 and the limiting block 13 on the washer one 2 and the washer two 3 are opposite, so that they are not easy to rotate when being stressed, thereby ensuring the stability and preventing the screw rod 1 from loosening. The middle parts of the washer one 2 and the washer two 3 are respectively provided with a clamping groove 11, and the clamping groove 11 facilitates the sleeve setting on the screw rod 1.

[0028] During work, the sleeve 5 arranged on the top surface of the screw cap 4 can enhance the tightness of the connection between the screw and the electric drill, and prevent the screw from deviating or falling during the fixing of the screw; and the washer one 2 and the washer two 3 are sleeved on the screw rod 1, the washer one 2 and the washer two 3 are connected with each other, and the screw can be effectively prevented from loosening during vibration, thereby ensuring the locking effect.

[0029] Finally, it should be noted that: the above only describes preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, and for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A self-tapping locking screw, comprising a screw shank (1), characterized in that, A nut (4) is fixedly provided on the top surface of the screw rod (1). An extension head (6) is fixedly provided in the middle of the top surface of the nut (4), and a cross groove (7) is provided in the middle of the top surface of the extension head (6). A sleeve (5) is also slidably provided on the nut (4), and the top end of the sleeve (5) is located at the top of the extension head (6). Washers 1 (2) and 2 (3) are respectively sleeved on the screw rod (1). Washer 1 (2) is located at the bottom of washer 2 (3), and multiple interlocking locking blocks (12) are provided on the opposite surfaces of washer 1 (2) and washer 2 (3). Multiple limiting blocks (13) are provided on the opposite back surfaces of washer 1 (2) and washer 2 (3).

2. The self-tapping locking screw according to claim 1, characterized in that, The diameter of the nut (4) is greater than the diameter of the extension head (6), and the thickness of the nut (4) is less than the thickness of the extension head (6).

3. A self-tapping locking screw according to claim 1, characterized in that, The top surface of the nut (4) is provided with an annular groove (8), and the sleeve (5) is slidably connected to the annular groove (8).

4. A self-tapping locking screw according to claim 1, characterized in that, The sleeve (5) has a first circular groove (9) and a second circular groove (10) respectively. The first circular groove (9) is located at the top of the second circular groove (10), and the diameter of the first circular groove (9) is smaller than the diameter of the second circular groove (10).

5. A self-tapping locking screw according to claim 4, characterized in that, The inner wall of the first circular groove (9) is slidably connected to the outer surface of the extension head (6), and the inner wall of the second circular groove (10) is slidably connected to the inner wall of the annular groove (8).

6. A self-tapping locking screw according to claim 1, characterized in that, The surfaces of the card block (12) and the limiting block (13) are both inclined, and the middle parts of the first washer (2) and the second washer (3) are respectively provided with card slots (11).

Images