JP3190770U - Structure of locking washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of a locking washer which can be used in combination with a locking nut and a locking bolt. SOLUTION: A hexagonal body 12 having an annular body 13 having a plurality of radially arranged ribs 130 on the bottom surface and a continuous wedge-shaped surface 120 provided in the center of the annular body and having a plurality of wedge-shaped protrusions 121 on the top surface. And a central hole 11 penetrating in the center. The annular body enhances the anti-loosening effect and can be removed with a general tool due to the outer shape of the hexagonal body. [Selection diagram] Fig. 1

Description

The present invention relates to a locking washer, and more particularly to a structure of a locking washer that is easy to remove and can reduce production costs.

In the industrial field, many facilities need to fix equipment by using a combination of nuts and washers. However, the contact surface of a general nut and washer is flat, and if placed in a vibrating state when transporting equipment, the nut and washer may rotate and loosen, which may cause equipment safety. Will affect sex.

Therefore, it is desirable to use a locking nut unit in equipment that is exposed to severe vibration. Reference is made to FIG. 4 showing the structure of a conventional locking nut unit. The locking nut unit includes a locking nut 41 and a locking washer 42. The locking nut 41 has a hexagonal column shape and a first wedge-shaped surface 411 is formed on the bottom surface. The locking washer 42 has a circular outer shape, and is provided with a second wedge-shaped surface 421 having a shape corresponding to the first wedge-shaped surface 411 on one surface facing the locking nut 41, and six ribs on the other surface. 422 is provided. Thereby, the frictional force at the time of screwing the locking nut unit and the surface of the processed part is reinforced. With the above structure, when the nut and washer rotate, the two opposing wedge-shaped surfaces are pressed against each other, and the stopper effect of the rib 422 is added, making it difficult for the nut to come off, preventing the loosening and theft prevention. Can be achieved. Further, the locking washer 42 is provided with a concave opening 423. When it is necessary to loosen the entire locking nut unit, a force must be simultaneously applied to the locking nut 41 and the concave opening 423 with a special hand tool.

Although the above-described conventional locking nut unit can obtain a certain effect in locking and preventing theft, the structure of the locking washer having the above-described concave mouth needs to use a special tool when loosening, The problem that it is impossible to remove and maintain with common hand tools is likely to occur. Further, in the manufacturing process, a loosening washer having a concave mouth produces more waste material, which increases the production cost. From the above, it can be said that there is room for improvement in the structure of the conventional locking washer.

An object of the present invention is to provide a structure of a locking washer that can be easily detached and can reduce production costs.

In order to achieve the above-described object, the structure of the locking washer of the present invention includes an annular body having a plurality of radially arranged ribs on the bottom surface, and a continuous wedge-shaped surface provided at the center of the annular body and the top surface. It consists of a hexagonal body and a central hole penetrating in the center.

In the structure of the locking washer described above, the continuous wedge-shaped surface includes a plurality of wedge-shaped projections, and the wedge-shaped projections have a stopper surface and an inclined surface.

The rib in the structure of the locking stopper washer includes a slope and a vertical wall, and the slope is provided along the screwing direction.

The central hole in the structure of the locking washer described above has a step shape, and an annular groove having a circumferential diameter slightly larger than the hole wall is provided at the lower part of the central hole.

The center hole in the structure of the locking washer described above forms a conical hole and includes a limiting step portion and a conical annular step portion. The limiting step is provided by being extended at an appropriate distance from the lowermost part of the continuous wedge-shaped surface, and is further extended obliquely outward from the bottom of the limiting step to form a conical annular step.

With the above structure, when the present invention is used in combination with a locking nut or a locking bolt, the annular body enhances the locking effect and the outer shape of the hexagonal body applies a force with a general tool. And a production cost can be reduced as compared with the prior art.

It is the schematic which showed the structure of Example 1 of this invention. It is the schematic which showed the structure of Example 2 of this invention. It is the schematic which showed the structure of Example 3 of this invention. It is the schematic which showed the structure of the conventional locking nut unit.

Example 1
Please refer to FIG. The figure shows the structure of the locking washer of the present invention. The structure of the locking washer according to the present invention is a combination part that can be combined with a threaded part such as a locking nut or a locking bolt by a central hole 11 provided in the center. 13 comprises a hexagonal body 12 provided above.

A continuous wedge-shaped surface 120 is provided on the top surface of the hexagonal body 12. The continuous wedge-shaped surface 120 includes a plurality of wedge-shaped protrusions 121, and the wedge-shaped protrusion 121 has a stopper surface 122 and an inclined surface 123. A plurality of ribs 130 arranged radially are provided on the bottom surface of the annular body 13. The rib 130 includes a slope 131 and a vertical wall 132, and the slope 131 is provided along the screwing direction.

When the lock washer of the present invention is used in combination with a lock nut or a lock bolt, the structure of the opposed continuous wedge-shaped surface 120 and the rib 130 causes a lock nut action of the lock nut unit and reduces the area. The large annular body 13 improves the frictional force, thereby further strengthening the loosening prevention effect. The outer shape of the hexagonal body 12 has a structure that can apply force with a hand tool at the same time as a general opening or sleeve when it is necessary to remove the nut unit. Can be removed. It has been found that the structure of the locking washer of the present invention can save material and reduce the production cost through the actual manufacturing process.

(Example 2)
Please refer to FIG. The second embodiment of the present invention includes a hexagonal body 21, an annular body 22 extending outward, and a center hole 23 provided in the center. The difference from FIG. 1 is that an annular groove 232 having a circumferential diameter slightly larger than the hole wall 231 is provided at the lower part of the center hole 23, so that the center hole 23 has a step shape. The structure of the locking washer of the second embodiment has the same effect as that of the first embodiment, and enables the nut and the washer to be movably connected and integrated. Other structures are the same as those of the first embodiment shown in FIG. 1, and will not be described again.

(Example 3)
Please refer to FIG. The third embodiment of the present invention includes a hexagonal body 31, an annular body 32 extending outward, and a center hole 33 provided in the center. The difference from FIGS. 1 and 2 is that the center hole 33 forms a conical hole and includes a limiting step portion 331 and a conical annular step portion 332. The limiting step 331 is provided with an appropriate thickness between the lowermost portion of the continuous wedge-shaped surface 310 (that is, the lowermost portion of the wedge-shaped protrusion 311) and the bottom surface of the locking washer. The conical annular step 332 is formed by stretching. The structure of the locking washer according to the third embodiment has the effects of the above-described embodiments, and similarly enables the nut and the washer to be movably connected and integrated. Other structures are the same as those of the first embodiment shown in FIG. 1, and will not be described again.

11 Central hole 12 Hexagonal body 120 Continuous wedge-shaped surface 121 Wedge-shaped projection 122 Stopper surface 123 Slope 13 Annular body 130 Rib 131 Slope 132 Vertical wall 21 Hexagonal body 22 Annular body 23 Central hole 231 Hole wall 232 Annular groove 31 Hexagonal body 310 Continuous wedge-shaped surface 311 Wedge-shaped protrusion 32 Annular body 33 Central hole 331 Restriction step portion 332 Conical annular step portion 41 Loosening prevention nut 411 First wedge-shaped surface 42 Loosening prevention washer 421 Second wedge-shaped surface 422 Rib 423 Concave mouth

Claims (3)

A structure of a locking washer comprising an annular body, a hexagonal body, and a center hole,
A plurality of ribs arranged radially are provided on the bottom surface of the annular body,
The hexagonal body is provided in the center of the annular body, and the hexagonal body top surface is provided with a continuous wedge-shaped surface,
The structure of the locking washer, wherein the center hole is formed through the center of the locking washer. The central hole has a stepped shape,
The structure of the locking washer according to claim 1, wherein an annular groove having a circumferential diameter slightly larger than the hole wall is provided in the lower portion of the center hole. The central hole forms a conical hole and includes a restriction step portion and a conical annular step portion,
The limiting step is provided to extend at an appropriate distance from the bottom of the continuous wedge-shaped surface,
2. The structure of the locking washer according to claim 1, wherein a conical annular step portion is formed by extending obliquely outward from a bottom portion of the restriction step portion.

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