JPH0732917Y2 - Space rubber for oil pan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a space rubber of an oil pan for eliminating a noise generated by eliminating a space formed between the oil pan and a flywheel housing. It is a thing.

[Prior Art] In a space rubber that fills the space between the oil pan and the flywheel housing to prevent noise from leaking out, the space rubber is prevented from falling off due to its own weight. At the same time, it is necessary to improve the attachment of the space rubber.

Conventionally, in order to prevent left and right shifts and to prevent falling, a recess that engages with the projection of the flywheel housing is formed on the upper side of the space rubber, and the space rubber is supported on the lower part of the oil pan and flywheel housing. In order to form a protruding flange for keeping the space, and for good adhesion to the oil pan and flywheel housing, use a space rubber from the space formed between the oil pan and flywheel housing. It was formed in a large volume and was pressed into the space in a compressed state. Another method is to attach a metal fitting to the space rubber and tighten it.

In other words, if the space rubber is displaced by the dead weight of the space rubber and the space rubber gradually slips out, the space rubber is set to a large press-fitting allowance for the structure. Because it will be.

In this type of prior art, as shown in FIG. 6, a rear end plate a is formed to project toward the oil pan b to form a projection c, and a recess d that engages with this projection is formed to form a plug e. "Engine noise suppression device" (Shokai 61-5337)
Issue gazette).

[Problems to be Solved by the Invention] However, if the projection is engaged with the recess and the outer surface of the space rubber is brought into close contact with the oil pan and the flywheel housing, the reaction due to the compression of the space rubber is prevented. There is a problem that the insertability of the space rubber is greatly deteriorated by the force.

An object of the present invention is to provide a space rubber for an oil pan that can be mounted in a space between the oil pan and the flywheel housing very easily and that is difficult to drop from the space.

[Means for Solving the Problems] In order to achieve the above object, the present invention forms a rubber body press-fitted into a space between an oil pan and a flywheel housing in a shape similar to the space and has , An opening penetrating in the thickness direction of the rubber body along the width direction of the rubber body is formed on the inside in the width direction, and the housing side of the upper part of the rubber body that borders this opening is depressed to the oil pan side. The upper part of the rubber body is formed into a thin tension portion, and columnar compression portions are formed at both ends of this tension portion.

[Operation] The rubber body is inserted into the space between the oil pan and the flywheel housing from below to above. From the middle of the insertion to the latter half of the insertion, the compression part comes into close contact with the outer peripheral surface of the oil pan, and the compression part increases the adhesion to the outer peripheral surface and extends the tension part to extend in the circumferential direction of the oil pan. They move in mutually opposite directions, and finally the compression part clings to the corner part of the oil pan, and the tension part comes into close contact with the outer peripheral surface of the oil pan. Therefore, the attachment of the rubber body to the space (insertion force, insertion direction) is
This is remarkably improved by the movement of the compression part due to the extension of the tension part, and the pulling reaction force of the tension part keeps the insertion posture of the rubber body in a correct state. Then, in the final inserted state, a reaction force due to the compression of the compression portion and a reaction force due to the tension of the tension portion are always generated, so a predetermined frictional force is generated between the outer peripheral surface of the oil pan and the rear surface of the flywheel housing, This frictional force prevents the rubber body from being displaced or dropped due to its own weight.

[Embodiment] A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 schematically shows an example in which the space rubber according to the present invention is provided between the oil pan and the flywheel housing.

As shown in FIG. 2, an oil pan 1 is formed by drawing a steel plate material having a predetermined plate thickness to have a first oil storage portion 2 having a constant depth, and is formed on the flywheel housing side with a first oil storage portion 2.
The second oil storage portion 3 is deeper than the oil storage portion 2 of FIG. The second oil storage portion 3 is formed in a rectangular shape in plan view. And oil pan 1
A horizontal flange portion 4 is formed on the outer peripheral edge of the upper part of the outer peripheral edge of the upper part of the outer peripheral edge. Bolt holes 5 are formed in the flange portion 4 at intervals, and bolts 6 inserted into the bolt holes 5 are screwed into the crankcase side so as to be integrally attached to the lower surface of the cylinder body (not shown). To be

A crankshaft (not shown) is provided on one side of the cylinder body.
A flywheel housing 7 formed so as to accommodate a flywheel (not shown) integrally attached to the base is integrally attached, and the flywheel housing 7 and the outer peripheral surface of the oil pan 1 are provided with an upward direction. A space 8 whose intervals are gradually reduced is formed. This space 8 becomes a noise source due to the standing waves as described above.

Therefore, a space rubber for reducing noise, that is, a rubber body formed into a predetermined shape is attached to the space 8.

As shown in FIG. 1, the rubber body 9 is formed in a horizontally long rectangular body shape along the circumferential direction of the second oil storage portion 3,
The shape of the front and rear surfaces of the rubber body 9 is the outer peripheral surface 10 of the second oil reservoir 3 and the rear surface of the flywheel housing 7.
It is formed along the shape of 11. Further, the volume of the rubber body 9 is formed to be appropriately larger than the volume of the space 8 and the volume of the rubber body 9 is contracted when it is inserted into the space 8 so that the compression force is
The outer peripheral surface 10 of the oil storage portion 3 and the rear surface 11 of the flywheel housing 7 are formed so as to be urged respectively, and as a result, they are fixed in the space 8.
The width of the rubber body 9 is set to be slightly smaller than the distance between the corners of the outer peripheral surface 10 of the second oil storage portion 3. A rectangular opening 12 that is long in the width direction is formed in the central portion on the lower side of the rubber body 9 with the middle in the width direction as the center. The upper portion of the rubber body that borders the opening 12 is located on the flywheel housing 7 side. The surface 13 is depressed toward the oil pan 1 side at a uniform depth along the width direction, and as a result, the upper part of the oil pan is formed as a thin tension portion 14 with respect to the other portion of the rubber body 9. At the same time, columnar compression portions 15 are formed on both ends of the pulling portion 14. Further, a recess for avoiding interference with the head of the bolt 6 for mounting the oil pan 1 is provided on the upper surface of the compression portion 15.
16 are formed. The head portion of the bolt 6 located between the compression portions 15 and 15 is prevented from interfering with each other by the gap 17 formed between the tension portion 14 and the flywheel housing 7.

Next, the operation of the embodiment will be described.

The rubber body 9 is inserted into the space 8 from below to above.
From the middle stage to the latter stage of the insertion, as shown in FIGS. 3 and 4, the compression portion 15 is the outer peripheral surface of the second oil storage portion 3.
10, the compression portion 15 increases the adhesion force to the outer peripheral surface thereof, extends the tension portion 14 and moves in the circumferential direction of the second oil storage portion 3 and in the opposite directions to each other, Finally, as shown in FIG. 3, the compression portion 15 clings to the corner portions 18 and 18 of the second oil storage portion 3, and the tension portion 14 adheres to the outer peripheral surface 10 of the second oil storage portion 3. Like Therefore, the mountability of the rubber body 9 in the space 8 is significantly improved by the movement of the compression portion 15 due to the extension of the tension portion 14, and the pulling reaction force of the tension portion 14 causes the rubber body 9 to be inserted in the correct posture. Will be held in a state. And in the hugging state of the final insertion state,
Since the reaction force due to the compression of the compression portion 15 and the reaction force due to the tension of the tension portion 14 are constantly generated, a predetermined distance is provided between the outer peripheral surface 10 of the second oil storage portion 3 and the rear surface 11 of the flywheel housing 7. Since a frictional force is generated and is continued by this frictional force, it is possible to prevent the rubber body 9 from falling out of the space 8 due to the weight of the rubber body 9.

In order to completely prevent the rubber body 9 from falling off,
As shown in FIG. 5, a bracket 19 for supporting the lower end surface of the rubber body 9 is attached to the lower outer peripheral surface 10 of the second oil reservoir 3 by spot welding or the like.

[Effects of the Invention] As is clear from the above description, the present invention exhibits the following excellent effects.

Due to the movement of the compression part based on the extension of the tension part, the mounting property (insertion force, directionality of insertion) of the rubber body is significantly improved, and after insertion, the reaction force due to the compression of the compression part and the reaction force due to the tension of the tension part Since the frictional force is constantly generated and a predetermined frictional force is generated between the outer peripheral surface of the oil pan and the rear surface of the flywheel housing, it is possible to prevent the rubber body from being displaced or dropped due to its own weight.

[Brief description of drawings]

FIG. 1 is a perspective view showing a preferred embodiment of the space rubber of the present invention, FIG. 2 is a view showing a mounting state of the space rubber of the present invention, and FIGS. 3 and 4 are mounting of the space rubber of the present invention. FIG. 5 is a schematic sectional view showing a state, FIG. 5 is a perspective view showing an example in which a bracket for supporting a rubber body is attached, and FIG. 6 is a sectional view showing a conventional example. In the figure, 1 is an oil pan, 7 is a flywheel housing, 8 is a space, 9 is a rubber body, 12 is an opening, 14 is a tension part, and 15 is a compression part.

Claims (1)

[Scope of utility model registration request] 1. A rubber body press-fitted into a space between an oil pan and a flywheel housing is formed in a shape similar to the space, and a rubber is formed at a lower portion of the rubber body inward in the width direction thereof along the width direction of the rubber body. An opening penetrating in the thickness direction of the body is formed, and the housing side of the upper part of the rubber body that borders the opening is depressed toward the oil pan to form the upper part of the rubber body as a thin tension part, and Space rubber for oil pans, which has columnar compression parts on both ends.