JPH0224904Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a cooling mechanism for an engine in an agricultural tractor, and more particularly to a mechanism for supplying cooling air to the engine and radiator.

Conventional technology Generally, in the case of agricultural tractors, an engine and a radiator are installed facing each other in the engine room, and a cooling fan is interposed between the radiator and the engine in conjunction with the rotation of the crankshaft. . The cooling air sucked into the engine room through the rotation of the fan passes through the radiator, thereby cooling the water stored in the radiator. It is provided so that the effect of cooling the outer wall of the engine can be obtained by spraying water onto the engine.

Problems that the invention aims to solve However, since the running speed of a tractor is considerably slower than that of a general automobile, most of the cooling air sent into the engine compartment is due to the suction effect of the fan. Since the fan is provided to rotate in conjunction with the crankshaft of the engine, as the engine rotational speed decreases, the fan rotational speed also decreases in proportion to this. In other words, with the cooling mechanism of the conventional structure, a problem arises in that sufficient cooling air cannot be obtained when the tractor is at low speed.

Conventionally, the solution to the above-mentioned problems has been to make the cooling fan larger so that a corresponding amount of cooling air can be obtained even when the engine is rotating at low speed. When the shape of the fan is enlarged in this way, a new problem arises in that there is wasted space in the engine room and the engine room becomes larger. That is, in the cooling mechanism of the conventional structure, there is a problem to be solved in that it is possible to obtain a sufficient amount of cooling air during low-speed operation of the tractor without increasing the shape of the cooling fan.

This invention is an attempt to improve the above-mentioned problems, and the purpose of this invention is to obtain stable cooling air at all times without being affected by changes in engine speed. In other words, the purpose is to make it possible to arbitrarily control the amount of cooling air according to the operating conditions of the tractor, such as when starting or when running at low speed.

The specific means and actions for solving the above problems are as follows.

Means for solving the problem: An engine is installed at the rear of the engine room formed at the front of the tractor body, and an appropriate inclination angle is provided at the front of the engine so that it extends diagonally backward and upward. The radiator is installed diagonally, and a fan is installed on each engine and radiator.The fan on the engine side is installed to rotate in conjunction with the crankshaft, while the fan on the radiator side is rotated via an electric motor. establish.

Function By being able to freely control the rotational speed of the fan on the radiator side, it is possible to obtain a cooling air volume that matches the operating conditions of the tractor.

Embodiments Specific embodiments of the present invention will be described below with reference to illustrative drawings.

Reference numeral 1 denotes a frame, and a front axle housing 2 is horizontally mounted on the lower side of the frame 1, extending in both left and right width directions, and a front wheel 3 is mounted on both ends of the front axle housing 2. Ru. On the other hand, an engine room is formed on the upper side of the frame 1, and the engine 4 is mounted at the rear end thereof. A pump shaft 6 is mounted horizontally on the engine 4 in conjunction with the rotation of the crankshaft 5, and a fan 7 is mounted on the pump shaft 6.
Furthermore, in the engine room formed on the upper side of the frame 1, a radiator 8 is mounted in front of the engine 4, and the radiator 8 is inclined at an appropriate angle so as to extend diagonally rearward and upward. It is provided with a corner. A fan 9 is mounted on the radiator 8 at its back, and the fan 9 is rotatably driven by an electric motor 10.

In addition, in the same drawing, 11 is a center console, 12 is a steering wheel, 13 is a joint housing, 14 is a transmission case, 1
5 is the final case, 16 is the rear axle case, 17 is the rear wheel, 18 is the fender, 1
9 indicates the respective sheets.

Effects of the invention The invention is constructed as described above.
As mentioned above, the engine and radiator are each equipped with a fan, and while the fan on the engine side is installed to rotate in conjunction with the crankshaft, the fan on the radiator side is rotated via an electric motor. The engine and radiator are cooled by separate fans, and the fan on the radiator side can control its air volume independently from the engine, so it is not affected by the engine speed. Moreover, it has become possible to obtain a stable cooling air volume corresponding to the driving conditions without wasting space in the engine room.

Furthermore, in the present invention, as described above, the engine is installed at the rear position in the engine room, and the radiator is installed at an appropriate inclination angle so as to extend diagonally rearward and upward in the front position of the engine. By installing the radiator diagonally, the height of the radiator can be shortened, and the height of the bonnet can be lowered. In other words, it is possible to store the radiator and the electric fan for cooling the radiator in the narrow engine room without enlarging the engine room, thereby securing the ground clearance of the tractor body and lowering the vehicle height. I was able to do something. In addition, the cooling air that has passed through the radiator can be discharged to the lower part of the aircraft's belly, making it possible to improve the cooling effect in the engine room.

[Brief explanation of the drawing]

The drawing is a side view showing the entire tractor equipped with an engine cooling mechanism according to the present invention. 1... Frame, 2... Front axle housing, 3... Front wheel, 4... Engine, 5... Crankshaft, 6... Pump shaft, 7...
Fan, 8...Radiator, 9...Fan, 1
0...Electric motor, 11...Center console, 12...Steering, 13...Joint housing, 14...Transmission case, 15...Final case, 16...Rear axle case, 17...Rear wheel, 18...
Fender, 19...seat.

Claims (1)

[Scope of utility model registration request] An engine is installed at a rear position in an engine room formed at the front of a tractor body, and a radiator is installed diagonally in front of the engine at an appropriate inclination angle so as to extend diagonally rearward and upward; The engine and the radiator are each equipped with a fan, and the fan on the engine side is installed so that it rotates in conjunction with the crankshaft, while the fan on the radiator side is installed so that it rotates via an electric motor. Cooling mechanism.