JPH0633250Y2 - Oil stopper for vehicle transmission- - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is, for example, a vehicle transmission.
The present invention relates to an oil stopper that prevents leakage of lubricating oil from the transmission when the drive shaft is pulled out for repair.

(Prior Art and its Problems) As this type of oil stopper, an oil stopper having a structure in which a seal plate and a collet chuck are combined has been proposed. With this oil stopper, insert the collet chuck into the hole of the drive shaft of the transmission housing, bring the seal plate into close contact with the oil seal at the entrance of the hole, and then rotate the adjust nut to move the collet chuck inside the hole. The oil stopper is fixed by expanding it with. This oil stopper has a considerable effect, but has a drawback that the structure is complicated and expensive due to the collet chuck and the screw portion for operating the collet chuck, and it takes a long time to install and remove. Therefore, an object of the present invention is to obtain an oil stopper for a vehicle transmission which can be quickly attached and detached and has a reliable seal and lock.

(Structure for Solving Problems) To achieve this object, an oil stopper of a vehicle transmission according to the present invention has a substantially disk-shaped seal plate portion and at least a tip end portion having elasticity, and the seal plate portion is A stopper base that extends from the center of the seal plate portion substantially at right angles to the seal plate portion and that includes a stem portion provided with a central blind hole that opens into the seal plate portion; The stopper base is equipped with a stopper pin in the form of a pipe shaft that has a through hole, and the outer diameter of the entire stem of the stopper base is made slightly smaller than the inner diameter of the hole into which the stem is to be inserted. , The tip portion of the stem portion is tapered in a tapered conical shape, and the central blind hole of the stem portion is formed in the central blind hole of the stopper pin. An enlarged inner diameter portion where a large portion can be slidably engaged, a tapered inner diameter portion that is tapered at the tip of the enlarged inner diameter portion, and the peripheral surface of the pipe shaft of the stopper pin can be slidably engaged at the position of the seal plate portion, Moreover, the tapered inner diameter portion is formed in a shape such that the wall thickness of the stem portion causes a thick portion in the middle portion, and the tapered inner diameter portion is formed at the center of the stopper pin having the pipe shaft shape. When it is pushed into the blind hole, the enlarged part in the central blind hole engages with the thick part of the tapered inner diameter part to expand the tip part of the stem part and tightly fix it to the hole. The seal plate portion is engaged with an oil seal provided in the housing having the hole to perform sealing.

(Function) By simply inserting the stopper base and the stopper pin, the portion of the stopper base made of the elastic material can be expanded to seal the hole of the transmission housing.
The seal plate portion of the stopper base comes into contact with the oil seal in the hole of the housing, and highly reliable sealing can be performed at two locations.

(Embodiment) An example of the oil stopper of the present invention is shown in FIG. 1, and this oil stopper comprises a stopper base 2 and a stopper pin 4.

The stopper base 2 is made of a highly elastic material such as CR (chloroprene rubber), and has a substantially disk-shaped seal plate portion 6 and a stem portion extending substantially at right angles from the center of the seal plate portion, as clearly shown in FIG. 8 and a tapered portion 10 is formed at the tip of the stem 8 and a central blind hole 12 that substantially corresponds to the outer shape of the stem portion 8 is formed. Therefore, a tapered hole 14 is formed at the tip of the central blind hole 12. The entrance 16 of the central blind hole 12 has a diameter slightly smaller than that of the central blind hole 12 in order to support the stopper pin 4. Considering the wear of the stem portion 8, it is preferable to provide the slightly thick portion 18.

The stopper base 2 does not need to be entirely made of an elastic body, and at least the tip portion of the stem portion 8 may be an elastic body.

FIG. 4 shows the stopper pin 4 with a part cut away. In this embodiment, a carbon steel pipe for general structure (STK) is used for weight reduction.
Although it is formed to be hollow by using, other materials can be used as long as they are rigid materials. In this embodiment, the enlarged portions 20 are provided at both ends.

When using this oil stopper, for example, the drive shaft hole of the transmission housing 22
The stem portion 8 of the stopper base 2 inside the 24 is inserted in the direction of the arrow, and the seal plate portion 6 is brought into contact with the oil seal 26. Next, insert the stopper pin 4 into the central blind hole 12,
The taper hole 14 of the central blind hole 12 is expanded by the enlarged portion of the tip of the stopper pin 4 so that the thick portion 18 is firmly crimped into the hole 24 of the drive shaft. With this simple operation, the thick portion 18 and the seal plate portion contacting the oil seal can prevent the oil in the transmission from leaking at two places.

To remove this oil stopper, first remove the stopper pin 4 and then remove the stopper base 2.

(Effect) Since the present invention is based on the principle of expanding the stopper base of the elastic body with the stopper pin, it does not require time such as screw rotation and is simply inserted, so it is extremely easy and quick to install and remove. You can Not only is the structure simple and inexpensive, but it also has the advantage of being highly reliable because it seals at two points.

[Brief description of drawings]

FIG. 1 is an assembled sectional view of an oil stopper of the present invention, FIG. 2 is a sectional view showing a state in which a stopper pin is deeply inserted into a stopper base and sealed, and FIG. 3 is a sectional view of the stopper base of the oil stopper of FIG. 4 and 5 are partially cutaway front views of the stopper pin of the oil stopper of FIG. 2 ... Stopper base, 4 ... Stopper pin 6 ... Seal plate part, 8 ... Stem part 10 ... Tapered part, 12 ... Center blind hole 14 ... Tapered hole, 16 ... Inlet 18 ... Thick part, 20 ... Large part 22 ... Housing, 24… hole 26… oil seal

Claims (1)

[Scope of utility model registration request] 1. A substantially disk-shaped seal plate portion (6) and at least a tip end portion thereof is elastic and extends from the center of the seal plate portion (6) substantially at right angles to the seal plate portion (6). And, a stopper base (2) consisting of a stem portion (8) provided with a central blind hole (12) opening in the seal plate portion (6), and slidable within the central blind hole (12), The stopper pin (4) has a pipe shaft-shaped stopper pin (4) with a through hole (20) on both sides to prevent it from slipping out. The part (8) is made slightly smaller than the inner diameter of the hole (24) into which it is to be inserted, and the tip of the stem part (8) is tapered in a tapered conical shape, and the central blind hole of the stem part (8) ( 12) is an enlarged inner diameter portion where the enlarged portion (20) at the tip in the central blind hole of the stopper pin (4) can slide and engage, A tapered inner diameter contracting tapered at other party of the large inner diameter portion, the sealing plate portion (6)
At this position, the peripheral surface of the pipe shaft of the stopper pin (4) can be slidably engaged, and has a reduced inner diameter portion that prevents passage of the enlarged portion (20), and the tapered inner diameter portion is an intermediate portion of the stem. The wall thickness of the portion (8) is formed in a shape that produces the thick portion (18), and the stopper pin (4) in the form of the pipe shaft is formed into the central blind hole.
Enlarged part (20) in central blind hole (12) when pushed into (12)
Engages with the thick portion (18) in the tapered inner diameter portion to widen the tip portion of the stem portion (8) and tightly fix it in the hole (24), and this hole is provided outside the hole (24). An oil stopper for a vehicle transmission characterized in that the seal plate (6) is engaged with an oil seal (26) provided in a housing (22) having (24) for sealing.