Screw with chamfer

Abstract

The screw comprises a supporting rotating disc used for supporting, a threaded guide shaft is arranged in the center of the upper end face of the supporting rotating disc, a cross-shaped clamping groove and a threaded rotating ring are formed in the center of the upper end face of the threaded guide shaft, and the threaded rotating ring is connected to the outer end face of the threaded guide shaft in a threaded mode. And anti-skid lines are arranged on the side end face of the threaded rotating ring at equal intervals. When an accessory is loosened and locked, the threaded rotating ring can be connected with the threaded guide shaft in a threaded mode, then the threaded rotating ring can move downwards in a threaded mode outside the threaded guide shaft, the threaded rotating ring can synchronously drive the four sets of fixing pressing rods to move downwards in the fixing sliding grooves, and therefore the four sets of connecting pressing shafts can penetrate into the connecting position of the accessory in a limited mode; and therefore, radial limiting on the exterior of the screw rod is completed, subsequent rotation of the screw rod is prevented, and the locking and loosening stability of the screw is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screw equipment, in particular to a screw with chamfers. Background Art

[0002] Screws are usually used to screw directly into a pre-drilled hole in another object in order to fix two or more objects together. Chamfered screws usually refer to screws with a certain chamfer or bevel at the end. This design helps the screw find the starting hole more easily during the insertion process and can reduce the possibility of damage during insertion. Generally speaking, the use of chamfered screws can improve installation efficiency and reduce errors in assembly.

[0003] Although the existing disposable chamfered screws have a certain stability when connecting accessories, after long-term use, the screws and the connected accessories will still become loose, thereby reducing the stability of locking the accessories. Therefore, there is an urgent need for a screw with a chamfered corner to solve the above-mentioned problem. Utility Model Content

[0004] The purpose of the utility model is to provide a screw with chamfered corners to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a screw with chamfered corners, comprising a supporting turntable for supporting, a threaded guide shaft is arranged at the center of the upper end surface of the supporting turntable, and a cross slot is opened at the center of the upper end surface of the threaded guide shaft,

[0006] A threaded swivel, the threaded swivel is threadedly connected to the outer end surface of the threaded guide shaft, and the side end surface of the threaded swivel is equidistantly provided with anti-slip grooves;

[0007] Fixed slide grooves, wherein the fixed slide grooves are provided with four groups in total, and the four groups of fixed slide grooves are equidistantly arranged on the inner end surface of the supporting turntable, and a screw rod is fixedly provided at the center of the lower end surface of the supporting turntable;

[0008] A limiting device is slidably engaged with the inner end surface of the supporting turntable through the fixed sliding groove.

[0009] Preferably, the limiting device includes a fixed pressure rod, a fixed clamping plate is arranged on the outer end surface of the fixed pressure rod near the top, a connecting pressure shaft is fixedly arranged at the center of the lower end surface of the fixed clamping plate, and a spring clamping ring is arranged on the lower end surface of the fixed clamping plate near the outside.

[0010] Preferably, the lower end surface of the spring clamp is fixedly connected to the bottom wall of the fixed slide groove, and the spring clamp can provide elastic force for supporting the fixed pressure rod.

[0011] Preferably, the diameter of the fixed clamping plate is larger than the diameter of the upper opening of the fixed sliding groove, which can prevent the limiting device from escaping from the fixed sliding groove and improve the stability of the limiting.

[0012] Preferably, the lower end surface of the connecting pressure shaft is flush with the lower end surface of the supporting turntable, which can prevent the connecting pressure shaft and the accessory from being limited when the screw is locked to the external accessory later.

[0013] Preferably, the lower end surface of the threaded swivel is elastically squeezed and fitted with the upper end surface of the fixed pressure rod, which can facilitate the subsequent threaded connection between the threaded swivel and the side wall of the threaded guide shaft, and can simultaneously drive the four groups of fixed pressure rods to move downward to a limited position.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. When the utility model is loosening or locking the accessory, the threaded swivel can be threadedly connected with the threaded guide shaft, and then can be threaded downward on the outside of the threaded guide shaft, so that the threaded swivel can synchronously drive the four groups of fixed pressure rods to move downward inside the fixed slide groove, so that the four groups of connecting pressure shafts can be limited and pierced into the inside of the accessory connection, thereby completing the radial limitation of the outside of the screw and the screw rod, preventing the subsequent rotation of the screw and the screw rod, and effectively improving the stability of locking and loosening the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a disassembled diagram of the main body of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the main body of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the limiting device of the utility model.

[0019] In the figure: 1-threaded swivel, 2-anti-slip groove, 3-limiting device, 4-fixed slide groove, 5-support turntable, 6-screw, 7-threaded guide shaft, 8-cross slot, 31-fixed clamping plate, 32-fixed pressure rod, 33-spring clamping ring, 34-connecting pressure shaft. DETAILED DESCRIPTION

[0020] 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 in 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.

[0021] See also Figure 1-3 The utility model provides an embodiment: a screw with chamfers, comprising a support turntable 5 for supporting, a threaded guide shaft 7 is arranged at the center of the upper end surface of the support turntable 5, and a cross slot 8 is opened at the center of the upper end surface of the threaded guide shaft 7,

[0022] A threaded swivel 1, which is threadedly connected to the outer end surface of the threaded guide shaft 7, and anti-slip grooves 2 are equidistantly provided on the side end surface of the threaded swivel 1;

[0023] Fixed slide grooves 4, there are four groups of fixed slide grooves 4, and the four groups of fixed slide grooves 4 are equidistantly arranged on the inner end surface of the supporting turntable 5, and a screw 6 is fixedly arranged at the center of the lower end surface of the supporting turntable 5;

[0024] The limiting device 3 is slidably engaged with the inner end surface of the supporting turntable 5 through the fixed sliding groove 4.

[0025] The limiting device 3 includes a fixed pressure rod 32, a fixed clamping plate 31 is arranged near the top of the outer end surface of the fixed pressure rod 32, and a connecting pressure shaft 34 is fixedly arranged at the center of the lower end surface of the fixed clamping plate 31, and a spring clamping ring 33 is arranged near the outside of the lower end surface of the fixed clamping plate 31.

[0026] The lower end surface of the spring snap ring 33 is fixedly connected to the bottom wall of the fixed slide groove 4, and the spring snap ring 33 can provide elastic force for the fixed pressure rod 32 to support it.

[0027] The diameter of the fixed clamping plate 31 is larger than the diameter of the upper opening of the fixed sliding groove 4, which can prevent the limiting device 3 from escaping from the fixed sliding groove 4 and improve the stability of the limiting.

[0028] The lower end surface of the connecting pressure shaft 34 is flush with the lower end surface of the supporting turntable 5, which can prevent the connecting pressure shaft 34 and the accessory from being limited when the screw 6 is locked to the external accessory later.

[0029] The lower end surface of the threaded swivel 1 is elastically pressed and fitted with the upper end surface of the fixed pressure rod 32, which can facilitate the subsequent threaded connection between the threaded swivel 1 and the side wall of the threaded guide shaft 7, and can simultaneously drive the four groups of fixed pressure rods 32 to move downward to a limited position.

[0030] Working principle: Before use, the user can position the screw 6 into the threaded hole to be connected, and then insert it into the cross slot 8 through an external tool for rotation. At this time, the threaded guide shaft 7 can drive the screw 6 to be locked into the threaded hole until the bottom of the support turntable 5 is completely fitted with the locking position. At this time, the user can rotate the threaded ring 1 through an external tool, and the threaded ring 1 can be connected to the threaded guide shaft 7, and then move down the upper thread of the support turntable 5. At the same time, the threaded ring 1 can drive the four groups of fixed pressure rods 32 to press down inside the fixed slide groove 4 while the thread moves down, until the four groups of connecting pressure shafts 34 can be inserted into the medium at the connection, thereby preventing the subsequent radial rotation of the screw 6, thereby improving the stability of the locking of the screw 6.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screw with a chamfer, comprising a support turntable (5) for supporting, a threaded guide shaft (7) is arranged at the center of the upper end surface of the support turntable (5), and a cross slot (8) is opened at the center of the upper end surface of the threaded guide shaft (7), characterized in that: A threaded swivel (1), the threaded swivel (1) being threadedly connected to the outer end surface of the threaded guide shaft (7), and anti-slip grooves (2) are equidistantly provided on the side end surface of the threaded swivel (1); A fixed slide groove (4), wherein the fixed slide groove (4) is provided with four groups in total, and the four groups of the fixed slide grooves (4) are arranged at equal distances on the inner end surface of the supporting turntable (5), and a screw (6) is fixedly provided at the center of the lower end surface of the supporting turntable (5); A limiting device (3), wherein the limiting device (3) is slidably engaged with the inner end surface of the supporting rotating disk (5) through the fixed sliding groove (4).

2. A screw with chamfer according to claim 1, characterized in that: The limiting device (3) comprises a fixed pressure rod (32), a fixed clamping plate (31) is arranged near the top of the outer end surface of the fixed pressure rod (32), a connecting pressure shaft (34) is fixedly arranged at the center of the lower end surface of the fixed clamping plate (31), and a spring clamping ring (33) is arranged near the outside of the lower end surface of the fixed clamping plate (31).

3. A screw with chamfer according to claim 2, characterized in that: The lower end surface of the spring clamp (33) is fixedly connected to the bottom wall of the fixed sliding groove (4).

4. The screw with chamfer according to claim 2, characterized in that: The diameter of the fixed clamping plate (31) is greater than the diameter of the upper opening of the fixed sliding groove (4).

5. The screw with chamfer according to claim 2, characterized in that: The lower end surface of the connecting pressure shaft (34) is flush with the lower end surface of the supporting rotating disk (5).

6. The screw with chamfer according to claim 2, characterized in that: The lower end surface of the threaded rotating ring (1) is elastically pressed and fitted with the upper end surface of the fixed pressure rod (32).

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