JPS6229635Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a protective cover for a timing belt that interlocks a crankshaft and a camshaft of a four-stroke engine.

Some four-stroke engines have a crankshaft and a camshaft interlocked via a toothed timing belt to open and close intake and exhaust valves. In a vehicle equipped with this type of engine at the front, a timing belt 1 is disposed at the front side of the engine body 2, as shown in FIG. It is normal to protect with 3.

On the other hand, in a vehicle equipped with a 4-stroke engine, one end of the torque support bracket 4 is attached to the front upper part of the engine body 2, and the other end of the torque support bracket 4 is supported by the vehicle body (not shown), so that the upper part of the engine is attached to the vehicle body. There is something that has been supported by

However, the torque support bracket 4
As shown in FIGS. 2 and 2, the timing belt 1 has a substantially U-shaped cross section and is attached to the engine body 2 so as to surround the cover 3.
The torque support member 1 had to be attached and detached when replacing or inspecting the torque support member 1. As a result, in a vehicle equipped with a four-cycle engine provided with the torque support bracket 4, the serviceability of the vehicle is poor, since time and effort are wasted in inspecting and replacing the timing belt 1.

The purpose of the present invention is to provide an engine timing belt protection cover that solves this problem, and by making at least a part of the cover function as a torque support member, it is easy to inspect and replace the timing belt. This system is characterized by improved serviceability.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 6.

In FIG. 3, 6 is the engine body. The engine body 6 includes a cylinder block 7 fixed to a vehicle body 31 at a portion not shown, and a cylinder head 8 on the cylinder block 7. 9 is a head cover on the cylinder head 8, and 10 is an exhaust board formed on the cylinder head 8.

In FIG. 4, 11 is a camshaft for opening and closing intake and exhaust valves, 12 is a toothed pulley attached to the camshaft 11, 13 is a crankshaft, 14 is a toothed pulley integrated with the crankshaft 13, and 15 is a toothed pulley. This is a timing belt with teeth that is suspended between pulleys 12 and 14.

16 is a protective cover for the timing belt 15, 1
Reference numeral 7 denotes a torque support member that constitutes a part of the protective cover 16.

The protective cover 16 covers the U-shaped bracket 1 of the torque support member 17 as shown in FIGS. 3 to 5.
8, an upper cover 19, and a lower cover 20. This bracket 18
The opposing piece is attached to the side of the cylinder head 8 with bolts 2.
It is removably attached via 1. The upper cover 19 is the first upper cover 19 shown in FIG.
a and a second upper cover 19b, the first cover 19a is attached to the front part of the cylinder head 8 as shown in FIG. installed. In Fig. 6, A is the shaft insertion hole;
B is a bolt hole. Further, the lower cover 20 is detachably attached to the cylinder block 7 with bolts (not shown). And bracket 18
Sealing materials 22 and 23 are interposed between the upper surface and the second upper cover 19b and between the lower surface of the bracket 18 and the upper surface of the lower cover 20, respectively. 24 is the first cover 19a and the second cover 19
This is a sealing material interposed between the

The torque support member 17 described above is attached to the bracket 1
8 (described above), a small U-shaped bracket 25 fixed to the bottom outer surface of the bracket 18, a shaft 26 supported between opposing pieces of the bracket 25, and a shaft 26.
6 and the elastic roll 27 attached to the elastic roll 2
7, and a bracket 29, one end of which is fixed to the cylinder 28. The other end of this bracket 29 is connected to the vehicle body 3 via a bolt 30.
It is removably attached to 1.

In the embodiment described above, the protective cover 16 is composed of three members, but this is not necessarily required. The entire protective cover may be composed of a part of the torque support member 17 .

As explained above, in the present invention, at least a part of the cover also functions as a torque support member, so that
In order to inspect or replace the timing belt, there is no need to remove the torque support member in addition to the cover. As a result, there is no need to waste time and effort in inspecting and replacing the timing belt as in the past, thereby improving the serviceability of the inspection and replacing. Furthermore, since the torque support member can be installed near the engine body, the space in the engine room can be made slightly larger.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing the relationship between a conventional engine main body and a timing belt protective cover. FIG. 2 is a partial perspective view of the engine shown in FIG. 1.
FIG. 3 is a partially cutaway perspective view of one embodiment of the present invention. FIG. 4 is a partial sectional view of FIG. 3. FIG. 5 is a partial front view of the protective cover shown in FIG. 3. FIG. 6 is a front view of the first cover of the upper covers shown in FIG. 3. 6...Engine body, 11...Camshaft,
12... Toothed pulley, 13... Crankshaft, 14... Toothed pulley, 15... Timing belt, 16... Protective cover, 17... Torque support member, 18... Bracket, 19... Upper cover, 19b... Second upper cover, 20... Lower cover, 21... Bolt, 22, 23, 24...
Sealing material, 30... Bolt, 31... Vehicle body.

Claims (1)

[Scope of utility model registration request] A timing belt disposed on the front side of the engine body is covered with a cover attached to the front side of the engine body, and one end of the torque support member is integrally provided on the upper part of the engine body, and the torque support member is 1. A timing belt protection cover for an engine, the other end of which is supported on a vehicle body side, wherein at least a portion of the cover also serves as the torque support member.