JPS628347Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to an improvement of a mounting device for a rotary piston engine, and in particular to a structure for improving the durability of the mount rubber.

(Prior Art) As a rotary piston engine, for example, the one shown in Japanese Utility Model Publication No. 57-47384 is known. That is, an oil pan is attached to the lower part of the engine casing, and after the oil in the oil pan lubricates the inside of the engine, it is returned to the oil pan through an oil return passage formed in the side housing. Further, although the engine mount member and the exhaust manifold are not shown, they are attached to both sides of the lower part of the engine casing. In the case of this configuration, there is a problem in that the mount rubber of the engine mount member is heated to a high temperature by heat from the exhaust manifold, and its durability deteriorates.

(Purpose of the invention) This invention was made to solve such conventional problems, and by cooling the engine mount member with engine lubricating oil,
To provide a structure that can improve the durability of the mount rubber by preventing the mount rubber from becoming hot.

(Structure of the invention) This invention is based on the idea that the oil that lubricates the inside of the engine
In a rotary piston engine in which the oil flows through an oil return passage formed in the side housing and returns to an oil pan attached to the lower part of the engine casing, an engine mount member is provided near the outlet of the oil return passage to reduce the exhaust The engine mount member is cooled by oil that is cooler than the manifold. In other words, the oil pan is formed so that the oil flowing out from the oil return outlet flows down the inner wall of the oil pan, and an engine mount member whose one end is fixed to the vehicle body is attached to the outer wall of the part of the oil pan where this flowing oil flows. Touch the other end,
The other end of the mount member is removably attached to the engine casing, and the oil pan portion is sandwiched between the engine casing and the mount member.

(Example) In FIG. 1, a side housing 1 constituting an engine casing of a rotary piston engine has an oil return passage 2 and a cooling water passage 10 partitioned by ribs 11. An exhaust pipe (exhaust manifold) 6 is attached to its side surface, and an oil pan 3 is attached to its lower surface. Oil return passage 2
extends downward from the side and is continuous with an outlet 7 opening at the lower surface of the side housing 1.

As shown in FIGS. 2 to 4, the oil pan 3 is integrally formed of a steel plate or the like so as to have a flange 31 on the upper outer periphery, and has a flat surface on one side for attaching a mount member 4, which will be described later. 30 is formed. A bolt hole 32 for fixing the oil pan is formed in the flange 31, and a bolt hole 90 for attaching a mount member is formed in the flat part 30.

Mount members 4 and 41 are attached to the lower part of the side housing 1 and below the exhaust pipe 6, and a mount rubber 5 is attached to one end of the mount members 4 and 41, and is attached to an appropriate position on the vehicle body (not shown) by a bolt 50. It is fixed to . The other end of the mount member 41 is detachably attached to the lower side surface of the side housing 1. The other end of the mount member 4 is brought into contact with the lower surface of a flat part 30 of the oil pan 3, and a bolt 9 is removably tightened to the side housing 1 at a position where this flat part 30 faces the outlet 7. By this, the mount member 4
A flat portion 30 is sandwiched between the side housing 1 and the side housing 1. The load on the side housing 1, and therefore the load on the engine casing, is transferred to the mount member 41 and
It is transmitted to the mount member 4 via the flat part 30 of the oil pan 3, and especially to the oil pan 3.
Since the flat portion 30 is held between the side housing 1 and the mount member 4, the flat portion 30 is exposed to severe conditions in terms of strength due to vibrations and the like. For this reason, it is preferable to strengthen the flat portion 30 by increasing the plate thickness or hardening it by heat treatment.

In the above configuration, since the flat portion 30 faces the outlet 7 of the oil return passage 2 of the side housing 1, the oil that lubricates the inside of the engine
is dropped from the oil return passage 2 through the outlet 7 onto the flat part 30, and from there flows down into the oil pan 3. The radiant heat of the high-temperature exhaust pipe 6 is transmitted to the mount member 4 and the mount rubber 5 is also heated. However, in the above configuration, the true mount member 4 is connected to the side housing 1 via the flat part 30, and the flat part 30 is Since the mount member 4 is constantly cooled by the oil 8 flowing down thereon, the heating of the mount member 4 is alleviated, and therefore the mount rubber 5 is prevented from being heated to a high temperature. In addition, the mount member 4
is normally attached to the lower side of the side housing 1, but due to the layout, the exhaust pipe 6
In this case, mounting on the lower surface of the side housing 1 as in the above configuration has the advantage of eliminating layout constraints.

(Effect of the invention) As explained above, this invention attaches the mount member to the lower surface of the engine casing via the oil pan, and places the oil pan part of this attachment part opposite the outlet of the oil return passage so that lubricating oil This system cools the mount member with oil, which prevents the mount rubber from being heated to high temperatures and improves the durability of the mount rubber. Restrictions on the mounting position of the mount member are also relaxed.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of this invention, Figure 2 is a sectional view showing an embodiment of this invention.
The figure is a plan view of the oil pan, Figures 3 and 4.
The figures are sectional views taken along lines - and -, respectively, of Fig. 2, and Fig. 5 is a bottom view of the mount member. DESCRIPTION OF SYMBOLS 1...Side housing, 2...Oil return passage, 3...Oil pan, 4...Mount member, 5...Mount rubber, 7...Outlet.

Claims (1)

[Scope of utility model registration request] In a rotary piston engine in which the oil that lubricates the inside of the engine passes through an oil return passage formed in the side housing and returns to the oil pan attached to the bottom of the engine casing, the oil that flows out from the outlet of the oil return passage is An oil pan is formed so as to flow down the inner wall of the oil pan, and the other end of an engine mount member, one end of which is fixed to the vehicle body, is brought into contact with the outer wall of the part of the oil pan through which this flowing oil flows, and the other end of the engine mount member is fixed to the vehicle body. A mount device for a rotary piston engine, characterized in that the other end is removably attached to an engine casing, and the oil pan portion is sandwiched between the engine casing and the mount member.