Cross recess countersunk head screw

Abstract

The utility model discloses a cross recess countersunk head screw which comprises a screw body, a binding tail is fixedly arranged at one end of the screw body, a screw cap is fixed to the end, away from the binding tail, of the screw body, a screwing groove is formed in one side of the screw cap, an anti-loosening groove is formed in the outer side of the screw cap, a sliding groove is formed in one side of the anti-loosening groove, and a screw rod is arranged in the sliding groove. A spring is fixed in the sliding groove, a limiting rod is fixed to one end of the spring, and the outer side of the screw body is sleeved with a tooth pad. The utility model has the beneficial effect that the screw looseness can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of countersunk screws, in particular to a cross slot countersunk screw. Background Art

[0002] Countersunk screws, also known as countersunk screws and flat machine screws, are a type of construction part. The head is a 90-degree cone, similar to common wood screws. The head has a tool tightening groove, which can be in the shape of a flat, cross, hexagonal, plum blossom, pentagonal, etc. Screws are used to connect two objects. Generally, the head of the screw will protrude above the surface of the object being connected, causing the surface to lose its flatness. Countersunk screws can sink under the surface to make the surface flat. Harder objects need to drill countersunk holes at the corresponding position of the countersunk head. In short, a countersunk head is a screw that can keep the surface flat after the screw head is installed. It is generally used to connect and fix parts.

[0003] Screws are mostly used for tightening and facilitating installation and disassembly. Generally, screws will loosen on their own due to vibration or other reasons during use. According to the force and tightening conditions of the thread, analysis shows that the main reason for the screw slipping is insufficient friction on the joint surface, which causes looseness when subjected to alternating force for a long time. Utility Model Content

[0004] The utility model aims to solve the problem that most screws are used for fastening and facilitating installation and disassembly, and general screws will loosen by themselves due to vibration or other reasons during use. According to the force and fastening conditions of the threads, it can be known through analysis that the main reason for the screw to slip is the insufficient friction of the joint surface, which causes the screw to loosen when subjected to alternating forces for a long time, and a cross recessed countersunk screw is proposed.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A cross recessed countersunk screw comprises a screw body, one end of the screw body is fixedly provided with a tail, an end of the screw body away from the tail is fixed with a screw nut, one side of the screw nut is provided with a twisting groove, the outer side of the screw nut is provided with an anti-loosening groove, one side of the anti-loosening groove is provided with a sliding groove, a spring is fixed in the sliding groove, one end of the spring is fixed with a limiting rod, and the outer side of the screw body is sleeved with a toothed pad.

[0007] Preferably, the twisting groove is in a "cross" structure, and anti-slip grooves are provided on the inner side of the twisting groove.

[0008] Preferably, ten anti-loosening grooves are provided, and ten tooth tips of the tooth pad are provided and matched with the anti-loosening grooves.

[0009] Preferably, the limiting rod is fixedly installed at one end of the spring away from the sliding groove, and the limiting rod is slidably installed in the sliding groove.

[0010] Preferably, a limiting groove is formed on the surface of the tooth pad, and the limiting rod is adapted to the limiting groove.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. By providing the spring, the spring can apply an elastic force to the limiting rod, causing the limiting rod to move towards the tooth pad side and be inserted into the limiting groove. When the screw body is screwed into an object, the spring can generate a reaction force between the screw cap and the tooth pad, generating an upward force on the screw body, increasing the friction between the thread and the object, and making the screw body not easily loosen.

[0013] 2. By providing anti-slip lines on the inner wall of the screwing groove, when the present utility model is in use, the situation of loosening during screwing can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] For the convenience of those skilled in the art to understand, the present utility model will be further described below with reference to the drawings.

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 2 is a front view structural schematic diagram of the present utility model;

[0017] Figure 3 is a cross-sectional structural schematic diagram of the screw cap in the present utility model.

[0018] In the figure: 1, screw body; 2, tail binding; 3, screw cap; 4, screwing groove; 5, anti-slip lines; 6, anti-loosening groove; 7, sliding groove; 8, spring; 9, limiting rod; 10, tooth pad; 11, limiting groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figure 1 - Figure 3As shown in the figure, a countersunk cross recess head screw includes a screw body 1. One end of the screw body 1 is fixedly provided with a tail binding 2. The end of the screw body 1 far from the tail binding 2 is fixed with a screw cap 3. A screwing groove 4 is formed on one side of the screw cap 3. An anti-loosening groove 6 is formed on the outer side of the screw cap 3. A sliding groove 7 is formed on one side of the anti-loosening groove 6. A spring 8 is fixed in the sliding groove 7. One end of the spring 8 is fixed with a limiting rod 9. A tooth pad 10 is sleeved on the outer side of the screw body 1. The tooth pad 10 is adapted to the anti-loosening groove 6. The tooth pad 10 can be clamped in the anti-loosening groove 6. After the screw body 1 is tightened, the tooth pad 10 can increase the friction of the screw body 1 and reduce loosening.

[0021] Please refer to Figure 1 - Figure 3 As shown in the figure, the screwing groove 4 is in a "cross" structure. Anti-slip lines 5 are arranged on the inner side of the screwing groove 4. The anti-slip lines 5 can reduce the sliding between the screwdriver and the screwing groove 4 when screwing the screw cap 3. There are ten anti-loosening grooves 6. There are ten tooth tips of the tooth pad 10, and they are adapted to the anti-loosening grooves 6, so that the tooth pad 10 can be clamped in the anti-loosening grooves 6, thereby increasing the friction of the screw body 1 and reducing the situation of the screw body 1 falling off. The limiting rod 9 is fixedly installed at the end of the spring 8 far from the sliding groove 7, and the limiting rod 9 is slidably installed in the sliding groove 7. A limiting groove 11 is formed on the surface of the tooth pad 10. The limiting rod 9 is adapted to the limiting groove 11, so that the limiting rod 9 can be inserted into the limiting groove 11. Under the action of the spring 8, there is a relative force between the screw cap 3 and the tooth pad 10, increasing the friction between the screw body 1 and the object, and reducing the loosening of the screw body 1.

[0022] When the utility model is in use, during use, the tooth pad 10 is sleeved on the outer side of the screw body 1, and the tooth tip position of the tooth pad 10 corresponds to the position of the anti-loosening groove 6, so that the limiting rod 9 is inserted into the limiting groove 11. Then, a cross-head screwdriver is used to tighten the screw body 1 at a specified position. After tightening, under the action of the spring 8, the spring 8 applies an elastic force to the limiting rod 9, causing the limiting rod 9 to always move towards the tooth pad 10 until the limiting rod 9 is inserted into the limiting groove 11. At the same time, the spring 8 generates a relative force between the screw cap 3 and the tooth pad 10, causing the screw cap 3 to drive the screw body 1 upward, increasing the friction between the thread of the screw body 1 and the object, and making the screw body 1 not easy to loosen.

[0023] The preferred embodiments of the present utility model disclosed above are only used to assist in the description of the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to only the specific implementation manners. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principle and practical application of the present utility model, so that those skilled in the relevant technical field can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A countersunk head cross recessed screw, comprising a screw body (1), characterized in that, One end of the screw body (1) is fixedly provided with a tail bundle (2), a screw cap (3) is fixed at the end of the screw body (1) far away from the tail bundle (2), a screwing groove (4) is arranged on one side of the screw cap (3), a loosening prevention groove (6) is arranged on the outer side of the screw cap (3), a sliding groove (7) is arranged on one side of the loosening prevention groove (6), a spring (8) is fixed in the sliding groove (7), a limiting rod (9) is fixed at one end of the spring (8), and a tooth pad (10) is sleeved on the outer side of the screw body (1).

2. The cross recessed countersunk head screw according to claim 1, characterized in that, The screwing groove (4) is in a "cross" structure, and anti-slip lines (5) are arranged on the inner side of the screwing groove (4).

3. A cross recessed countersunk head screw according to claim 1, wherein, Ten loosening prevention grooves (6) are provided, ten tooth tips of the tooth pad (10) are provided, and they are adapted to the loosening prevention grooves (6).

4. A countersunk head cross recessed screw according to claim 1, wherein, The limiting rod (9) is fixedly installed at the end of the spring (8) far away from the sliding groove (7), and the limiting rod (9) is slidably installed in the sliding groove (7).

5. A cross recessed countersunk head screw according to claim 1, wherein, A limiting groove (11) is formed on the surface of the tooth pad (10), and the limiting rod (9) is adapted to the limiting groove (11).

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