JP2002172943A - Car body of tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent rise of die cost caused by newly producing a cast made flywheel housing and a clutch housing in increasing hose power of an engine. SOLUTION: In substitution for the flywheel housing, sheet metal made end plate 9 is interposed between the engine 1 and the clutch housing 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a tractor body.

[0002]

2. Description of the Related Art There are two types of two-shaft, four-wheel tractors, a frame type and an integrated type, and the integrated type is the mainstream in agricultural tractors. An integrated tractor vehicle body will be described with reference to FIG. A flyhole housing 3 having a flywheel 2 is connected to a rear surface of the engine 1 by fasteners 4 such as bolts. A clutch housing 5 is connected to the housing 3 by fasteners 6. The flyhole housing 3, the clutch housing 5 and the transmission case 7 are generally made of casting.

[0003]

In the field of tractors for upland farming, it has recently been desired to increase the engine horsepower.
With the increase in the horsepower of the engine, the capacity of the clutch is increased (the clutch size is increased), and therefore, the flywheel housing 3 and the clutch housing 5 made of casting must be newly manufactured. However, the cost of the mold is enormous in order to make a new cast part, and other engines cannot be mounted on derivative models or the like, which limits the degree of freedom in design.

Accordingly, the present invention uses a sheet metal end plate instead of a flywheel, which is a cast article, to connect the engine and the clutch housing even when the engine has a high horsepower, thereby reducing mold cost. It is an object of the present invention to save money and increase design flexibility.

[0005]

According to the present invention, a tractor body 8 is provided by connecting a clutch housing 5 to a rear surface of an engine 1.
In order to achieve the above object, the following technical measures have been taken. That is, in the vehicle body 8 of the tractor according to the first aspect, the engine 1 and the clutch housing 5 are connected via the sheet metal end plate 9 between the rear surface of the engine 1 and the front surface of the clutch housing 5. It is characterized by the following.

By adopting such a configuration, even if the engine 1 has a high horsepower, it is not necessary to newly manufacture the flywheel housing 3 unlike the conventional example, and the engine 1 is provided via the end plate 9 made of sheet metal. And the clutch housing 5 can be connected.
Here, the die cost can be reduced and the degree of freedom in design can be increased. A bonnet 10 is provided on the end plate 9.
It is recommended that an extended portion 9A for attaching the stay 11 is formed (claim 2).

That is, conventionally, it was necessary to form a mounting boss or the like on the flywheel housing 3 or the like in order to mount the stay 11, but the
The stay 11 can be easily and reliably mounted using the mounting hole 9B or the like formed in A.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. Note that portions common to the configuration described above with reference to FIG. 3 are denoted by the same reference numerals, and differences will be mainly described below. The tractor T shown in FIG. 1 is a two-axle, four-wheel type having left and right front wheels F and left and right rear wheels R, and is provided between a rear surface of the engine 1 having a high horsepower and a front surface of the clutch housing 5. The engine 1 and the clutch housing 5 made of casting are connected to each other by a fastener 6 or the like with an end plate 9 made of sheet metal interposed.

Left and right side plates constituting a front axle frame 12 are attached to lower left and right portions of the engine 1 with bolts or the like, and the front axle frame 12 supports front wheels F as left and right steering wheels. Is covered with a hood 10. As shown in FIGS. 2 (1) and 2 (2), the end plate 9 has an outer shape conforming to the front surface of the clutch housing 5, and has an insertion hole 9C for a clutch shaft (engine crankshaft) or the like at the center thereof. Are formed and a starter mounting hole 9D and a mounting hole 9E are formed on one side.

The end plate 9 has a thickness of, for example, 12 ±
It is made of a 0.1 mm SS400 metal (made of sheet metal), and extended portions 9A and 9F are formed in a flange shape on the upper and lower portions thereof, and the stay 11 of the bonnet 10 is formed on the upper extended portion 9A.
Mounting holes 9B are formed for mounting the lower extension portions 9F.
Has a mounting hole 9G for an engine oil pan or the like, and also has a positioning hole 9H for connecting the engine 1 and the clutch housing 5 and a bolt insertion hole 9I. In addition, in FIG. 1, a tractor T has a main transmission device, a differential device, and the like built in a vehicle body 8, and has a steering handlebar 13 and a driver's seat on the vehicle body 8, and these are surrounded by a cabin 15. A fuel tank 16 and the like are mounted on left and right sides of the vehicle body 8.

According to the above-described embodiment, even if the clutch capacity is increased with the increase in the horsepower of the engine 1, the clutch housing 5 is made of a cast article so as to be able to accommodate the clutch case. It suffices to interpose an end plate 9 made of sheet metal conforming to the front shape.
This eliminates the need for a new flywheel housing 3 made of casting. As a result, the cost of the mold can be reduced, and a different engine 1 can be mounted, thereby increasing the degree of freedom in design.

When performing various operations with the tractor T,
Compression, tension, bending, and the like act on a connection (connection) portion between the engine 1 and the clutch housing 5. By interposing an end plate 9 made of sheet metal at this portion, the clutch housing 5 made of a casting is formed. Durability can be improved, and oil sealability can be improved.

[0013]

As described above in detail, according to the present invention, even if the engine has a high horsepower, the cost of the mold for constructing the vehicle body can be reduced and the degree of freedom in design can be improved.

[Brief description of the drawings]

FIG. 1 is an overall side view of a tractor to which the present invention is applied.

FIGS. 2A and 2B show an end plate and a connecting portion thereof, wherein FIG. 2A is a front view and FIG. 2B is a side view.

FIG. 3 is an exploded perspective view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine 5 Clutch housing 8 Body 9 End plate

Claims (2)

[Claims] 1. A tractor body (8) having a clutch housing (5) connected to a rear surface of an engine (1), wherein a tractor body (8) is provided between a rear surface of the engine (1) and a front surface of the clutch housing (5). A vehicle body for a tractor, wherein an engine (1) and a clutch housing (5) are connected via an end plate (9) made of sheet metal. 2. The tractor according to claim 1, wherein an extension (9A) for attaching a stay (11) such as a bonnet (10) is formed on the end plate (9). Body.