Wiring terminal screw with high fastening capacity

Abstract

The utility model provides a wiring terminal screw with strong fastening capability, which comprises a screw rod and a screw head arranged at the rear end of the screw rod, the screw rod is provided with a protruding bulge part, the screw rod is provided with an external thread groove, and the external thread groove penetrates through the bulge part. The protruding protruding part arranged on the screw increases the friction force and the clamping force when the screw is in contact with the wiring terminal, the screw can be effectively prevented from loosening in the using process, and the stability and the reliability of connection are improved. For example, in some equipment with relatively large vibration, the design can ensure that the condition of poor contact of wiring caused by loosening of the screw can be avoided. And the arrangement that the external thread groove penetrates through the lug boss enables the threads to be better engaged when the screw is screwed into the wiring terminal, thereby further enhancing the fastening effect. Compared with a traditional screw, the design can bear larger tension and torsion, and the screw is not prone to slipping or breaking.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware fasteners, and particularly relates to a terminal screw with strong fastening ability. Background Art

[0002] Terminal screws are very important components in electrical connections.

[0003] Its main function is to firmly fix wires or conductors on the terminal to ensure stable and safe transmission of current.

[0004] Terminal screws are usually made of metal, such as stainless steel or copper, with good electrical conductivity and durability. Their design usually takes into account the fastening force and anti-loosening characteristics to prevent loosening during use, resulting in poor contact or open circuit.

[0005] During the tightening use of the screw, problems often occur, such as errors between the threaded hole and the bolt, such as the threaded hole being slightly larger, or during use, the threaded hole deforms and becomes larger, which will make it difficult to tighten and fix the screw. Summary of the Invention

[0006] In view of the problems pointed out in the background art, the utility model provides a terminal screw with strong fastening ability to solve the above technical problems.

[0007] The technical solution of the utility model is realized as follows:

[0008] A terminal screw with strong fastening ability includes a screw rod and a screw head arranged at the rear end of the screw rod. A protruding raised portion is provided on the screw rod, and an external thread groove is provided on the screw rod, and the external thread groove penetrates through the raised portion.

[0009] The utility model is further arranged such that the raised portion is strip-shaped and extends along the length direction of the screw rod.

[0010] The utility model is further arranged such that a concave deformation groove is provided on the raised portion, and the deformation groove is arranged along the length direction of the raised portion.

[0011] The utility model is further arranged such that in the length direction of the raised portion, the thickness of the raised portion gradually becomes thicker from both ends to the middle.

[0012] The utility model is further arranged such that a cross-shaped operation groove is provided on the screw head.

[0013] The utility model is further arranged such that the thread pitch of the external thread groove gradually becomes smaller from the front end to the rear end of the screw rod.

[0014] The present utility model is further configured such that anti-slip lines are provided on the edge of the screw head.

[0015] The present utility model is further configured such that the front end of the screw rod is conical.

[0016] The present utility model is further configured such that both sides in the width direction of the convex portion are arc-shaped.

[0017] The present utility model is further configured such that the screw rod, the screw head, and the convex portion are manufactured by an integral molding process.

[0018] Adopting the above technical solutions, the beneficial effects of the present utility model are as follows:

[0019] For the terminal screw with strong fastening ability provided by the present utility model, the protruding convex portion provided on the screw rod increases the friction and clamping force when the screw contacts the terminal, and can effectively prevent the screw from loosening during use, improving the stability and reliability of the connection. For example, in some devices with large vibrations, this design can ensure that the wiring will not have poor contact due to screw loosening. The arrangement that the external thread groove penetrates the convex portion enables the thread to better bite when the screw is screwed into the terminal, further enhancing the fastening effect. Compared with traditional screws, this design can withstand greater tensile force and torsional force and is not prone to thread slipping or breaking. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a schematic structure of the present utility model Figure I .

[0022] Figure 2 It is a schematic structure of the present utility model Figure II .

[0023] Figure 3 It is a side view of the present utility model. Detailed Embodiments

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] For reference Figures 1-3 The utility model is described as follows:

[0026] Embodiment 1: A terminal screw with strong fastening ability comprises a screw rod 1 and a screw head 2 arranged at the rear end of the screw rod 1, a cross-shaped operating groove 6 is arranged on the screw head 2, an anti-slip pattern 7 is arranged on the edge of the screw head 2, and the front end of the screw rod 1 is conical.

[0027] The screw rod 1 is provided with a protruding boss 3, and the screw rod 1 is provided with an external thread groove 4, and the external thread groove 4 is set through the boss 3. The boss 3 is protrudingly set on the screw rod, which increases the surface roughness and friction of the contact part with the terminal. This convex structure can better embed into the material of the terminal when the screw is tightened to prevent the screw from loosening. The external thread groove 4 is set through the boss, so that the thread can also play a role in the boss, which enhances the degree of engagement between the screw and the internal thread of the terminal.

[0028] When the diameter of the connection hole on the terminal is slightly larger than the diameter of the screw 1, it may usually lead to a loose connection. However, the presence of the protrusion 3 can well compensate for this defect. The protrusion 3 is embedded in the material of the terminal, which can increase additional friction and resistance, so that the screw can still maintain a stable connection in this case of mismatch.

[0029] For example, in some wiring terminals whose manufacturing precision is not particularly high, there may be a certain error in the processing of the connection hole, resulting in a larger diameter. At this time, the raised portion 3 of the screw plays a key role and ensures the reliability of the connection.

[0030] When the device vibrates or is impacted by external forces during operation, since the protrusion 3 has been embedded in the terminal material, it can effectively resist these influences and reduce the risk of screw loosening.

[0031] The raised portion 3 is in the shape of an elongated strip, and the raised portion 3 is extended along the length direction of the screw rod 1. The elongated design makes the contact area between the raised portion 3 and the screw rod 1 larger and more evenly distributed, so that the force can be better transmitted when subjected to force, and the local stress concentration can be reduced. Extending along the length direction of the screw rod 1 increases the contact length with the terminal material. This means that during the screw tightening process, a larger friction force and clamping force range can be provided, thereby enhancing the tightening effect of the screw.

[0032] The raised portion 3 is provided with a concave deformation groove 5 which is arranged along the length direction of the raised portion 3. When the screw is tightened, the material of the terminal can enter into the deformation groove 5. This makes the combination between the raised portion 3 and the terminal closer and firmer. The deformation groove 5 provides space for the slight deformation of the raised portion 3, reducing the risk of the raised portion 3 breaking due to excessive extrusion. The deformation groove 5 increases the contact points and contact area between the screw and the terminal, further improving the fastening effect and stability.

[0033] In the length direction of the raised portion 3, the thickness of the raised portion 3 gradually becomes thicker from both ends to the middle. When the screw is screwed into the terminal, the thinner parts at both ends can be more easily embedded into the terminal material, playing a role of preliminary positioning and guiding. As the screw is further tightened, the thicker part in the middle can provide stronger support and clamping force, ensuring a firm and reliable connection between the screw and the terminal. This gradually changing thickness design helps to disperse stress, reducing the possibility of the raised portion 3 breaking or being damaged due to stress concentration during the fastening process.

[0034] The thread pitch of the external thread groove 4 gradually becomes smaller from the front end to the rear end of the screw rod 1. The larger thread pitch at the front end enables the screw to enter the terminal more easily when starting to be screwed in, reducing the initial screwing resistance and improving the installation efficiency. As it advances towards the rear end of the screw rod, the gradually decreasing thread pitch increases the contact density and biting degree between the threads. This enables the screw to provide stronger fastening force at the rear end, effectively preventing the screw from loosening during use. This gradually changing thread pitch design helps to evenly distribute stress, avoiding stress concentration at specific parts, thereby improving the overall strength and durability of the screw rod.

[0035] Both sides in the width direction of the raised portion 3 are arc-shaped. The arc-shaped side edges can reduce the frictional resistance with the terminal material during the process of screwing the screw into the terminal, making the installation of the screw smoother. This arc-shaped design increases the contact area between the raised portion 3 and the terminal, improving the contact stability and uniformity, and further enhancing the fastening effect of the screw.

[0036] The screw rod 1, the screw head 2, and the raised portion 3 are manufactured by an integral molding process. Integral molding can ensure the strength and stability between components to the greatest extent. There is no risk of breakage or damage due to the weakness of the connection part, improving the overall durability of the screw.

[0037] The above are only the preferred embodiments of the present utility model, and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A terminal screw with strong fastening ability, comprising a screw rod (1) and a screw head (2) arranged at the rear end of the screw rod (1), characterized in that: The screw rod (1) is provided with a protruding boss (3), and the screw rod (1) is provided with an external thread groove (4), and the external thread groove (4) is arranged through the protruding boss (3).

2. A terminal screw with strong fastening ability according to claim 1, characterized in that: The protrusion (3) is in the shape of an elongated strip, and the protrusion (3) is extended along the length direction of the screw rod (1).

3. A terminal screw with strong fastening ability according to claim 2, characterized in that: The protruding portion (3) is provided with an inwardly concave deformation groove (5), and the deformation groove (5) is arranged along the length direction of the protruding portion (3).

4. The terminal screw with strong fastening ability according to claim 2, characterized in that: In the length direction of the raised portion (3), the thickness of the raised portion (3) gradually increases from both ends to the middle.

5. The terminal screw with strong fastening ability according to claim 1, characterized in that: The screw head (2) is provided with a cross-shaped operating groove (6).

6. The terminal screw with strong fastening ability according to claim 1, characterized in that: The thread pitch of the external thread groove (4) gradually decreases from the front end to the rear end of the screw rod (1).

7. The terminal screw with strong fastening ability according to claim 1, characterized in that: The edge of the screw head (2) is provided with anti-slip grooves (7).

8. The terminal screw with strong fastening ability according to claim 1, characterized in that: The front end of the screw (1) is conical.

9. The terminal screw with strong fastening ability according to claim 1, characterized in that: Both sides of the raised portion (3) in the width direction are arc-shaped.

10. The terminal screw with strong fastening ability according to claim 1, characterized in that: The screw rod (1), screw head (2) and raised portion (3) are manufactured using an integrated molding process.

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