Anti-deformation double-end self-tapping screw

Abstract

The utility model provides an anti-deformation double-end self-tapping screw, and relates to the technical field of self-tapping screws, the anti-deformation double-end self-tapping screw comprises a first screw head and a reinforcing mechanism arranged on one side of the first screw head, the reinforcing mechanism comprises a second screw head fixedly arranged on the outer side of one end of the first screw head, resistance mechanisms used for providing counter-acting force to prevent deformation are arranged on the inner sides of the first nail head and the second nail head, the first limiting block and the second limiting block generate rotation tendency under the action of torque force generated by the first nail head and the second nail head, and the first limiting block and the second limiting block generate rotation tendency under the action of the counter-acting force applied to the two sides of the first nail head and the second nail head. The inclined surfaces of the first limiting block and the second limiting block are in close contact through spring connection, and generated counter-acting force effectively counteracts part of torque force.

Description

TECHNICAL FIELD

[0001] The utility model relates to self tapping screw technical field especially relates to a kind of anti-deformation double-end self tapping screw. BACKGROUND

[0002] Double-end self tapping screw is different from ordinary screw, it has no nut to cooperate, whole is rod-like, the thread shape and size of both ends are usually designed according to specific application scene, can be directly screwed into relatively soft material, such as wood, plastic and thin metal plate, forms fastening connection, is often used to need to establish firm connection between two components, in furniture manufacturing, if two pieces of wood are to be connected vertically, double-end self tapping screw can be screwed from one side, after passing through a piece of wood, again self tapping enters another piece of wood, realizes firm connection, in electrical equipment installation, for some occasions with limited space, only single-side operation, double-end self tapping screw can fix equipment on mounting plate, provides stable support for equipment.

[0003] Traditional double-end self tapping screw has poor stability, deformation is prone to occur when drilling due to excessive torsion, after screw deformation, it is difficult to closely fit the screw hole of connected component, under the action of vibration and external force, connection site is prone to loosen, affect overall structural stability, after screw deformation, local stress concentration, crack is prone to occur during repeated stress process, even breakage, greatly shorten service life, increase replacement frequency and maintenance cost. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of anti-deformation double-end self tapping screw, can traditional double-end self tapping screw stability is poor, deformation is prone to occur when drilling due to excessive torsion, after screw deformation, it is difficult to closely fit the screw hole of connected component, under the action of vibration and external force, connection site is prone to loosen, affect overall structural stability, after screw deformation, local stress concentration, crack is prone to occur during repeated stress process, even breakage, greatly shorten service life, increase replacement frequency and maintenance cost problem.

[0005] To realize the above-mentioned purpose, the utility model adopts the following technical scheme: a kind of anti-deformation double-end self tapping screw, including first nail head, still including the reinforcing mechanism of being arranged in the first nail head one side, the reinforcing mechanism includes the second nail head of being fixedly arranged in the outer side of the one end of the first nail head, the first nail head and the second nail head inside are provided with the resistance mechanism for providing counterforce anti-deformation, the end inside of the first nail head and the second nail head is provided with the communication mechanism for reducing resistance.

[0006] As a preferred implementation form, the resistance mechanism comprises a limiting groove, the limiting groove is arranged on the inner side of the first nail head and the second nail head, the inner side of the limiting groove is slidably connected with a first limiting block and a second limiting block, the cross section of the first nail head, the second nail head and the limiting groove is composed of a plurality of petal-shaped structures, and the first limiting block and the second limiting block are polygonal structures matched with the limiting groove.

[0007] As a preferred implementation form, the first limiting block and the second limiting block are provided with inclined structures on one side, and the first limiting block and the second limiting block are oppositely arranged.

[0008] As a preferred implementation form, the first limiting block and the second limiting block are provided with inclined structures on one side, and the first limiting block and the second limiting block are oppositely arranged.

[0009] As a preferred implementation form, the first limiting block and the second limiting block are provided with inclined structures on one side, and the first limiting block and the second limiting block are oppositely arranged.

[0010] As a preferred implementation form, the communication mechanism comprises a communication groove, the communication groove is annularly arranged on the inner side of the first nail head and the second nail head, and the communication groove penetrates the first nail head and the second nail head.

[0011] As a preferred implementation form, one end of the second nail head is provided with a slag inlet, and the slag inlet is communicated with the inner side of the communication groove.

[0012] As a preferred implementation form, one end of the first nail head is provided with a slag outlet, and the slag outlet is communicated with the inner side of the communication groove.

[0013] Compared with the prior art, the utility model has the advantages and positive effects that:

[0014] 1. The utility model discloses, when using, the torque force that produces through first nail head and second nail head, first limit block and second limit block produce the tendency of rotation under its action, the counterforce that first nail head and second nail head both sides exert, cooperate spring connection and make first limit block and second limit block inclined plane close contact, the counterforce that produces effectively offsets part torque force, this greatly reduced the possibility that first nail head and second nail head occur deformation, guaranteeed the reliability of screw under the scene of frequent installation and bearing larger torque, prolonged its life, and the strength of whole device was enhanced by petal shape limit slot through groove structure, avoided the local stress concentration phenomenon, made the device still can keep the integrity of structure under the complex stress environment, prevented premature deformation or damage due to stress concentration, improved product quality and stability, improved the performance of the device, can satisfy more application scene.

[0015] 2. The utility model discloses, when using, through the communication groove, reduce the resistance that borehole received, reduce the additional load that first nail head and second nail head produce, can reduce the probability that first nail head and second nail head occur deformation, can make borehole operation more relaxed simultaneously, reduce the labor intensity of worker, reduce the waste residue extrusion resistance, can avoid the second nail head from deviating due to uneven stress when drilling, thereby improve the precision of drilling, further reduce the possibility that the device deforms, when the waste residue is accumulated around the second nail head, will increase the friction force on the surface of second nail head, and the smooth waste residue discharge design through the communication groove reduces this resistance, prolongs the service life of screw, reduces the use cost. ACCURACY OF THE DRAWINGS

[0016] Figure 1 It is a front view structural schematic diagram of the anti-deformation double-head self-tapping screw provided by the utility model;

[0017] Figure 2 It is a sectional view of the first nail head in the anti-deformation double-head self-tapping screw provided by the utility model;

[0018] Figure 3 It is a structural schematic diagram of the first limit block and the second limit block in the anti-deformation double-head self-tapping screw provided by the utility model;

[0019] Figure 4 It is an anti-deformation double-head self-tapping screw provided by the utility model Figure 2 The enlarged view of A.

[0020] LEGEND:

[0021] 1, first nail head;

[0022] 2, reinforcing mechanism; 21, second nail head; 22, limit slot; 23, first limit block; 24, second limit block; 25, spring; 26, communication groove; 27, residue inlet; 28, residue outlet. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0024] Please refer to Figure 1 - Figure 4 The utility model provides a technical scheme: a kind of anti-deformation double-end self-tapping screw, including first nail head 1, it further include the reinforcing mechanism 2 of being arranged in the side of first nail head 1, reinforcing mechanism 2 includes the second nail head 21 of being fixedly arranged in the outer side of one end of first nail head 1, the resistance mechanism for providing counterforce anti-deformation is arranged in the inner side of first nail head 1 and second nail head 21, the communication mechanism for reducing resistance is arranged in the inner side of the end of first nail head 1 and second nail head 21, resistance mechanism includes limit groove 22, limit groove 22 is opened in the inner side of first nail head 1 and second nail head 21, the first limit block 23 and second limit block 24 are slidably connected in the inner side of limit groove 22, the cross section formed by first nail head 1 and second nail head 21 with limit groove 22 is composed of multiple petal shape structures, first limit block 23 and second limit block 24 are polygonal structure matched with limit groove 22, first limit block 23 and second limit block 24 are closely connected with the inner wall surface of limit groove 22, the side of first limit block 23 and second limit block 24 is all arranged by inclined structure, first limit block 23 and second limit block 24 are oppositely arranged, the end inner side of first limit block 23 and second limit block 24 is all opened with circular recess, spring 25 is arranged in the recess inner side of first limit block 23 and second limit block 24, the both ends outer side of spring 25 is fixedly connected with the inner side of one end of first limit block 23, the inner side of one end of second limit block 24 respectively.

[0025] When the user uses the device, the second nail head 21 can be aligned with the position that needs to be fixed, at this time, the first nail head 1 is rotated by the wrench, and the first limiting block 23 and the second limiting block 24 are symmetrically arranged in the first nail head 1 and the second nail head 21 along the axial direction. The first limiting block 23 and the second limiting block 24 are oppositely arranged, and the inclined surfaces thereof are opposite. When the device is used for rotary connection, the first nail head 1 and the second nail head 21 transmit the torque force, and the first limiting block 23 and the second limiting block 24 tend to rotate due to the action of the torsional force. The first nail head 1 and the second nail head 21 simultaneously apply a counteracting force to the torsional tendency of the first limiting block 23 and the second limiting block 24. The inclined surfaces of the first limiting block 23 and the second limiting block 24 are in close contact under the connection of the spring 25. At this time, due to the action of the inclined surfaces of the first limiting block 23 and the second limiting block 24, a component force perpendicular to the inclined surface direction is generated. This component force forms a counteracting force in the opposite direction of the torsional force of the first nail head 1 and the second nail head 21, effectively offsets part of the torque force, prevents the first nail head 1 and the second nail head 21 from deforming, and enhances the overall strength of the device. Compared with the ordinary circular through slot, the petal-shaped structure can better disperse stress. When the first nail head 1 and the second nail head 21 are subjected to the torque force, the petals of the petal-shaped through slot can uniformly disperse the force to the main body of the first nail head 1 and the second nail head 21, reduce local stress concentration, prevent premature deformation or damage caused by stress concentration, and effectively offset part of the torque force through the counteracting force generated by the rotation tendency of the first limiting block 23 and the second limiting block 24 under the action of the torque force generated by the first nail head 1 and the second nail head 21, the counteracting force generated by the counteracting force applied by the first nail head 1 and the second nail head 21 on both sides and the connection of the spring 25 makes the inclined surfaces of the first limiting block 23 and the second limiting block 24 in close contact, which greatly reduces the possibility of deformation of the first nail head 1 and the second nail head 21, ensures the reliability of the screw in the scene of frequent installation and bearing large torque, prolongs the service life, and enhances the strength of the entire device through the petal-shaped limiting slot 22 through slot structure, avoids local stress concentration, makes the device still maintain the integrity of the structure in a complex stress environment, prevents premature deformation or damage caused by stress concentration, improves product quality and stability, and improves the performance of the device. It can meet more application scenarios.

[0026] As shown in Figure 1 - Figure 4 The communication mechanism includes a communication groove 26, which is annularly arranged on the inner side of the first nail head 1 and the second nail head 21, and penetrates the first nail head 1 and the second nail head 21. One end of the second nail head 21 is provided with a residue inlet 27 on the outer side, and the residue inlet 27 is in communication with the inner side of the communication groove 26. One end of the first nail head 1 is provided with a residue outlet 28 on the outer side, and the residue outlet 28 is in communication with the inner side of the communication groove 26.

[0027] In the second drill head 21 drilling process, the second drill head 21 head cutting material generated by the slag will be accumulated in the hole, through the cooperation of the communication groove 26, the inlet 27 and the outlet 28, the waste slag can enter the communication groove 26 through the inlet 27, and be discharged through the outlet 28, while the communication groove 26 itself through the first drill head 1 and the second drill head 21 can also be used for waste slag in and out, reduce the waste slag around the second drill head 21 and the first drill head 1, avoid its extrusion resistance to the screw, through the communication groove 26 to reduce the resistance when drilling, reduce the first drill head 1 and the second drill head 21 to produce additional load, can reduce the probability of deformation of the first drill head 1 and the second drill head 21, at the same time can make the drilling operation more easily, reduce the labor intensity of workers, reduce the extrusion resistance of waste slag, can avoid the second drill head 21 from offsetting when drilling due to uneven stress, thereby improving the drilling precision, further reducing the possibility of deformation of the device, when the waste slag is accumulated around the second drill head 21, the friction force on the surface of the second drill head 21 will increase, and the smooth waste slag discharge design through the communication groove 26 reduces this resistance, prolongs the service life of the screw, and reduces the use cost.

[0028] Working principle: When using this device, the user can align the second nail head 21 with the position to be fixed. Then, the first nail head 1 is rotated using a wrench. Simultaneously, a first limiting block 23 and a second limiting block 24 are symmetrically arranged axially inside the first nail head 1 and the second nail head 21, placed opposite each other with their inclined surfaces facing each other. When the device is used for rotational connection, the first nail head 1 and the second nail head 21 transmit torque. The first limiting block 23 and the second limiting block 24 will tend to rotate due to the torsional force. The first nail head 1 and the second nail head 21 simultaneously exert reaction forces on the torsional tendency of the first limiting block 23 and the second limiting block 24. Under the connection of the spring 25, the first limiting block 23 and the second limiting block 24... When the inclined surfaces of the limiting blocks 24 are in close contact, a component force perpendicular to the inclined surface will be generated due to the action of the inclined surfaces of the first limiting blocks 23 and the second limiting blocks 24. This component force forms a reaction force in the opposite direction to the torsional force of the first nail head 1 and the second nail head 21, effectively offsetting part of the torque force and preventing deformation of the first nail head 1 and the second nail head 21. At the same time, the petal-shaped limiting groove 22 can enhance the overall strength of the device. Compared with ordinary circular through grooves, the petal-shaped structure can better disperse stress. When the first nail head 1 and the second nail head 21 are subjected to torque force, each petal of the petal-shaped through groove can evenly distribute the force to the main body of the first nail head 1 and the second nail head 21, reducing local stress concentration and preventing premature deformation or damage caused by stress concentration. The generated torque force causes the first limiting block 23 and the second limiting block 24 to rotate under their action. The reaction force applied to both sides of the first nail head 1 and the second nail head 21, combined with the spring 25, ensures that the inclined surfaces of the first limiting block 23 and the second limiting block 24 are in close contact. The generated reaction force effectively offsets part of the torque force, which greatly reduces the possibility of deformation of the first nail head 1 and the second nail head 21, ensuring the reliability of the screw under frequent installation and high torque conditions, and extending its service life. The petal-shaped limiting groove 22 through-slot structure enhances the strength of the entire device, avoids local stress concentration, and enables the device to maintain structural integrity under complex stress environments, preventing premature deformation or damage due to stress concentration, and improving product quality. The improved quantity and stability enhance the performance of the device, enabling it to meet a wider range of application scenarios. During the drilling process of the second nail head 21, the waste slag generated from cutting the material at the head of the second nail head 21 accumulates inside the hole. Through the cooperation of the connecting groove 26, the slag inlet 27, and the slag outlet 28, the waste slag can enter the connecting groove 26 through the slag inlet 27 and be discharged through the slag outlet 28. At the same time, the connecting groove 26 itself penetrates through the first nail head 1 and the second nail head 21, allowing waste slag to enter and exit as well. This reduces the accumulation of waste slag around the second nail head 21 and the first nail head 1, preventing it from creating compressive resistance on the screw. The connecting groove 26 reduces the resistance encountered during drilling, reducing the additional load on the first nail head 1 and the second nail head 21, and lowering the probability of deformation of the first nail head 1 and the second nail head 21.Meanwhile, the device can make the drilling operation more easily, reduce the labor intensity of workers, reduce the waste residue extrusion resistance, avoid the second nail head 21 from deviating due to uneven force when drilling, thereby improving the drilling precision and further reducing the possibility of deformation of the device.

[0029] The above is only a preferred embodiment of the present application, and does not limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technology content into equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application without departing from the technical scheme of the present application still belongs to the protection scope of the present application.

Claims

1. A deformation-resistant double-ended self-tapping screw comprising a first screw head (1), characterized in that: Also include the reinforcing mechanism (2) arranged in the first nail head (1) side, the reinforcing mechanism (2) includes the second nail head (21) fixedly arranged in the first nail head (1) one end outside, the first nail head (1) and the second nail head (21) inside be provided with the resistance mechanism for providing the reaction force anti-deformation, the first nail head (1) and the second nail head (21) end inside be provided with the communication mechanism for reducing resistance.

2. A deformation resistant double ended self tapping screw as claimed in claim 1 wherein: The resistance mechanism includes a limiting groove (22), the limiting groove (22) is opened in the inside of the first nail head (1) and the second nail head (21), the inside of the limiting groove (22) is slidably connected with first limiting block (23) and second limiting block (24), the first nail head (1) and the second nail head (21) with the limiting groove (22) formed by the cross section is composed of multiple petal-shaped structure, the first limiting block (23) and the second limiting block (24) are polygonal structure matched with the limiting groove (22).

3. A deformation resistant double ended self tapping screw as claimed in claim 2 wherein: The first limiting block (23) and the second limiting block (24) are closely connected with the inner wall of the limiting groove (22).

4. The anti-deformation double-end self-tapping screw according to claim 2, characterized in that: The first limiting block (23) and the second limiting block (24) are closely connected with the inner wall of the limiting groove (22).

5. A deformation resistant double ended self tapping screw as claimed in claim 4 wherein: The first limiting block (23) and the second limiting block (24) are closely connected with the inner wall of the limiting groove (22).

6. A deformation resistant double ended self tapping screw as defined in claim 1 wherein: The first limiting block (23) and the second limiting block (24) are closely connected with the inner wall of the limiting groove (22).

7. A deformation resistant double ended self tapping screw as claimed in claim 6 wherein: The first limiting block (23) and the second limiting block (24) are closely connected with the inner wall of the limiting groove (22).

8. A deformation resistant double ended self tapping screw as defined in claim 6 wherein: The first limiting block (23) and the second limiting block (24) are closely connected with the inner wall of the limiting groove (22). The first limiting block (23) and the second limiting block (24) are closely connected with the inner wall of the limiting groove (22).

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