CN205858929U - A kind of sunk screw anti-skid washer - Google Patents

Abstract

The utility model discloses a countersunk screw anti-slip washer, which is an annular cone (1) with an inverted trapezoidal cross section. The thickness is 0.3-0.6mm, the side of the annular cone (1) is provided with a through groove (3), and the two sides of the edge of the groove are laterally offset. The utility model fills the gap in anti-loosening measures for countersunk head screws through the design of the anti-loosening washer. The anti-loosening washer has simple structure, convenient manufacture and flexible use, and can effectively prevent the problems of loosening and failure of countersunk head screws during use. , Improve the safety and reliability of the equipment.

Description

Countersunk screw anti-skid washer

technical field

The utility model belongs to the technical field of mechanical connection and fixing, and in particular relates to the improvement of the countersunk screw anti-skid washer.

Background technique

At present, countersunk head screws are widely used in various fields such as machinery manufacturing and equipment installation. Because the screw head of the countersunk screw is in the shape of a conical surface, ordinary spring washers cannot be used. Therefore, there is no reliable anti-loosening measure for the countersunk screw. Or the use of the product, the screw will gradually loosen, if not checked in time, it will affect the safety of equipment and personnel, so a washer that can reliably prevent the countersunk screw from loosening is needed.

Utility model content

The utility model overcomes the deficiencies of the prior art and provides a washer which can effectively prevent countersunk screws from loosening, so as to meet the requirements for fastening safety of products or equipment.

Considering the above-mentioned problems of the prior art, according to one aspect disclosed by the utility model, the utility model adopts the following technical solutions:

A countersunk screw anti-slip washer, which is a revolving part of spring material, the anti-slip washer is an annular cone (1) with an inverted trapezoidal cross-section, and the angle between the bottom of the anti-slip washer and the hypotenuse of the trapezoidal cross-section is 30° °, the annular thickness of the annular cone (1) is c, c=0.3～0.6mm, the annular cone (1) has a smaller diameter ring inner diameter ΦA>2mm, and the side of the annular cone (1) has a through hole Groove (3), the width of the groove (3) is b, b is 1-3 mm, and both sides of the groove edge have a lateral offset a, a is 0.5-1.5 mm, and the lateral offset can prevent the countersunk screw from loosening.

Through the design of the anti-loosening washer, the gap in anti-loosening measures for countersunk head screws is filled. The anti-loosening washer is simple in structure, easy to manufacture, and flexible in use, which can effectively prevent the loosening and failure of countersunk head screws during use, and improve equipment. safety and reliability of use.

Description of drawings

Fig. 1 is the schematic diagram of the cross-sectional structure of the utility model anti-skid washer

Figure 2 is a top view of the utility model anti-skid washer

Fig. 3 is a schematic diagram of the use of the utility model anti-skid washer

detailed description

The utility model will be further described in detail below in conjunction with the examples, but the implementation of the utility model is not limited thereto.

Referring to Fig. 1, a countersunk screw anti-slip washer, which is a revolving part of a spring material, the anti-slip washer is an annular cone (1) with an inverted trapezoidal section, and the bottom and hypotenuse of the anti-slip washer are trapezoidal in section The included angle is 30°, the annular thickness of the annular cone (1) is c, c=0.3～0.6mm, the annular cone (1) has a smaller diameter inner diameter ΦA>2mm, the side of the annular cone (1) There is a through groove (3) at the bottom, the width of the groove (3) is b, b is 1-3mm, and there is a lateral offset a on both sides of the groove edge, a is 0.5-1.5mm, and the lateral offset can prevent countersunk screws from loose.

The use method of the utility model is: put the washer on the countersunk screw (5), make the inner conical surface (6) of the washer fit the screw head cone surface (5a) of the countersunk screw (5), and then place the countersunk screw (5) The head screw (5) is fastened in the screw hole (8), so that the outer tapered surface (9) of the washer and the tapered hole (7) are deformed and fit together. Due to the deformation, the lateral offset of the groove (3) of the washer is opposite to The conical surface of the screw head (5a) has a larger pressure all the time, thereby improving the radial frictional force, making the countersunk screw (5) unable to loosen, thereby achieving the purpose of anti-loosening.

The utility model has the advantages of simple structure, easy manufacture and convenient use, and can be widely used in various aspects in conjunction with countersunk screws.

Claims (1)

1. a sunk screw anti-skid washer, it is the revolving parts of a kind of spring material, and described anti-skid washer is that cross section is The annular cones body (1) of inverted trapezoidal, the trapezoidal base, cross section of anti-skid washer and hypotenuse angle are 30 °, the ring of annular cones body (1) Shape thickness is c, c=0.3～0.6mm, and annular cones body (1) has the internal radius Φ A ＞ 2mm of small diameter, annular cones Body (1) sidepiece has groove (3), and groove (3) a width of b, b are 1～3mm, and the both sides of trough rim have lateral shift a, a be 0.5～ 1.5mm, this lateral shift is prevented from sunk screw and loosens.