JPH0577516U - Oil drain plug structure - Google Patents

Abstract

(57) [Summary] [Purpose] An oil drain plug with high durability that allows users to work without soiling their hands when changing oil. [Structure] A cylindrical member 2 provided with a drain hole 10 provided on the bottom surface of the oil pan 1 and a male screw portion 2a on the outer periphery and fixed to communicate with the drain hole 10 outside the oil pan 1.
A drain plug 3 that has a female screw portion 3a on the inner periphery and is screwed into the male screw portion 2a; a gasket 6 interposed between the drain plug 3 and the end of the cylindrical member 2; A discharge hole 4 is provided between the inner circumference of the female screw portion 3 a and the outer circumference of the gasket 6 by opening at the bottom surface of the gasket 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an oil drain plug provided at the bottom of an engine oil pan.

[0002]

[Prior Art]

 When you replace the engine oil by loosening the drain plug on the engine oil pan, you can prevent the oil from sticking to your hands, etc. by installing a drain cock or using the actual engine number 57-13856. As disclosed in the publication, a drain plug is provided with a discharge hole and a sub plug is provided in this discharge hole.

[0003]

[Problems to be solved by the device]

 However, the drain cock has a problem in durability of the welded portion as well as an increase in cost due to a complicated overall structure. On the other hand, in the latter case where the sub-plug is provided, when the discharge hole is closed with the sub-plug, the oil attached to the discharge hole may stain hands and the like.

Therefore, an object of the present invention is to provide an oil drain plug having high durability while being able to work without soiling hands when changing oil.

[0005]

[Means for Solving the Problems]

 According to the present invention, a drain hole provided on the bottom surface of the oil pan, a cylindrical member having a male screw portion on the outer periphery and fixed to communicate with the drain hole on the outer side of the oil pan, and a female screw portion on the inner periphery are provided. A drain plug that is screwed into the male screw portion, a seal member that is interposed between the drain plug and an end portion of the tubular member, and the female screw portion that opens at the bottom surface of the drain plug. And a discharge hole penetrating between the inner periphery of the seal and the outer periphery of the seal member.

[0006]

[Action]

 When the drain plug is loosened, the seal member separates from the end of the tubular member, the drain hole of the drain plug and the drain hole of the oil pan communicate with each other, and oil is drained from the bottom of the drain plug. Work can be done without getting dirty.

[0007]

【Example】

 This embodiment shows an embodiment in which the present invention is applied to a drain plug provided in an engine oil pan.

In FIGS. 1 to 4, a cylindrical member 2 is fixed downward as a cylindrical member on the outer side of a drain hole 10 provided at the bottom of the oil pan 1. Has a through hole 2b having a predetermined inner diameter which communicates with the drain hole 10, while a male screw portion 2a having a predetermined length from the end is formed on the outer periphery to be screwed with the drain plug 3.

The drain plug 3 has a hexagonal outer shape and is formed so as to be fitted with a tool. A hole of a predetermined depth having a female screw portion 3 a formed on the inner periphery thereof is provided on the inner side of the drain plug 3. It is screwed with the male screw part 2a.

A circular annular groove portion 5 having a predetermined depth is formed in the inner peripheral bottom portion of the drain plug 3, and the annular groove portion 5 accommodates a gasket 6 that comes into contact with the bottom surface of the cylindrical member 2 as a sealing member. . On the outside of the accommodated gasket 6, a plurality of discharge holes 4 are provided at predetermined intervals, which are opened in the bottom surface of the drain plug 3 and penetrate to the inner circumference on the female screw portion 3a side.

With the above-mentioned configuration, the operation will be described.

FIG. 1 shows a state in which the drain plug 3 is fastened, and the gasket 6 accommodated in the bottom of the inner peripheral surface of the drain plug 3 is in close contact with the end surface of the cylindrical member 2 so that the through hole 2 b of the cylindrical member 2 is formed. The inside of the oil pan 1 is sealed by closing it.

As shown in FIG. 3, when the drain plug 3 is loosened by a tool or the like by changing the oil, the seal member 6 is separated from the end surface of the cylindrical member 2 and the through hole 2b and the discharge hole 4 are communicated with each other. The oil inside 1 is discharged directly below the bottom surface of the drain plug 3. After draining a predetermined amount of oil, tightening the drain plug 3 and bringing the seal member 6 into close contact with the end surface of the cylindrical member 2 enables firm fastening like a normal bolt, and the inside of the oil pan 1 is sealed again. .

Therefore, if the work is performed from a place other than directly under the drain plug 3, the hands and tools are not soiled with oil, and the drain plug 3 can be securely fastened like a normal bolt, so that the durability is deteriorated. In addition, since the structure is simple, it is possible to prevent cost increase by eliminating complicated machining.

FIG. 5 shows an example in which the drain plug 3 is applied to the bottom of the oil filter case 9, and although not shown, it can be applied to a portion such as a transmission or differential gear that uses a fluid that needs to be replaced. is there.

[0016]

[Effect of the device]

 As described above, according to the present invention, by loosening the drain plug, the oil is discharged from the drain hole, and by tightening the drain plug, the seal member can keep the oil pan tightly sealed, so that the hands and tools are not dirty. Without changing the oil, it can be fastened in the same way as a normal bolt, preventing deterioration of durability and suppressing the cost increase as a structure that can be easily processed.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a cross-sectional view showing a released state of the drain plug.

FIG. 4 is a diagram showing a mounting position of a drain plug.

FIG. 5 is a view showing another attachment position of the drain plug.

[Explanation of symbols]

 2 Cylindrical member 2a Male screw 2b Through hole 3 Drain plug 3a Female screw 4 Discharge hole 5 Annular groove 6 Gasket

Claims (1)

[Scope of utility model registration request] 1. A drain hole provided on a bottom surface of an oil pan, a cylindrical member having a male screw portion on an outer periphery and fixed to communicate with the drain hole on an outer side of the oil pan, and a female screw portion on an inner periphery. A drain plug that is threadedly engaged with the male screw portion, a sealing member that is interposed between the drain plug and an end portion of the tubular member, and the female screw that is opened at the bottom surface of the drain plug. An oil drain plug structure comprising: an exhaust hole penetrating between an inner circumference of the portion and an outer circumference of the seal member.