JPS6318254Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a protector structure for protecting a transmission case in a control machine, particularly a tailor that performs axle plowing.

This type of management machine has an axle working device, that is, a rotor attached to its axle, and rotates this rotor in the soil to perform tillage work. The lower half of the transmission case that conveys the information is also in a state of being plunged into the soil, and as a result, it is subjected to the abrasion effect of the soil. In addition, in order to reduce the weight of the control machine and reduce manufacturing costs, the above-mentioned mission case is formed by aluminum die-casting, etc., but as a result, the mission case is more strongly abraded by the above-mentioned soil. It turns out. Therefore, in order to protect the transmission case from the above-mentioned abrasion effects, it has been conventional practice to provide a lower protector made of a thin steel plate to substantially the lower half of the transmission case that comes into contact with the soil. By the way, when plowing a field using a management machine, stones are often mixed in with the soil in the field, and when working with a rotor in such a field, the stones can cause damage to the rotor and the side of the transmission case of the management machine. Even if a lower protector is provided to prevent wear as described above, if a stone gets caught in the exposed part of the transmission case above it, the transmission case may be worn out or damaged. was. Also, in order to eliminate the above drawback, there is a model in which the lower protector is extended upward to eliminate the exposed part of the transmission case, but even in this case, the lower protector is made of a thin steel plate, so it is difficult to do so. It was impossible to avoid deformation due to the lateral pressure of the stone when it was bitten, causing damage to the transmission case over a long period of time.
Furthermore, in order to deal with this, a device has been devised in which ribs are formed on the side surfaces of the lower protector that extends upward to protect the transmission case from the lateral pressure caused by the stones, but even with this, the case is It has the disadvantage that it is easily deformed by the lateral pressure of the stone, and that the ribs must be molded into the protector, making the molding process troublesome.

Therefore, the present invention provides for both sides of the transmission case in a range from above near the axle of the lower protector to at least the radius of rotation of the rotor.
A side protector which is thicker than the lower protector and has a flat plate shape is fixed to the lower protector so as to partially overlap with the lower protector, an engine frame is fixed to the front of the side protector, and a hitch is fixed to the rear of the side protector. It is an object of the present invention to provide a mission case protection structure for a management machine that eliminates the above-mentioned drawbacks.

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

As shown in FIG. 1, the management machine 1 has an engine frame 2, and is equipped with an engine 3, a belt device 5, etc. on the engine frame 2, and a transmission case that protrudes downward from the engine frame 2. 6 is provided. The mission case 6
An axle portion 7 is provided at the bottom of the wheel so as to protrude from both sides thereof.
A rotor 9, which is a working machine, is attached to the axle portion 7, and power from the engine 3 is transmitted to the axle portion 7 via a belt device 5 and a transmission mechanism within a transmission case 6. , the above rotor 9
It is designed to rotate. A lower protector 10 made of a thin steel plate is provided in a substantially lower half portion of the transmission case 6 surrounding the vicinity of the axle shaft portion 7 so as to cover the portion. The lower protector 10 has a second
As shown in the drawings and enlarged in FIG. 3, it has a half-piece structure, and is fixed by bolts 11, 11, respectively, which also serve as fitting and tightening of the mission case 6. Further, above the lower protector 10, at least the rotor 9 (see FIG. 1) is provided from the vicinity of the axle portion 7 of the lower protector 10.
Mission case 6 with a range exceeding the turning radius of
A side protector 12 is disposed over both side portions of the vehicle so as to partially overlap the lower protector 10 near the axle portion 7 . The side protector 12 is made of a steel plate or the like that is thicker than the lower protector 10, and has a relatively flat plate-like structure that is not processed very deeply.
It is fixed to the transmission case 6 by bolts 13, to the rear hitch 16 by bolts 15, and further to the front engine frame 2 by bolts 17.

FIG. 4 shows an example in which the structure of the lower protector 10' is modified in the protection structure of the mission case according to the present invention, which includes the above-mentioned lower protector and side protectors.
In this modification, the lower protector 10' is
For example, a short arc-shaped concave rib 10'a is formed in the lower part near the axle portion 7, and the half body is assembled with a bolt 10'b (not tightened together with the case 6) to form a lower protector 10'. When completing the process, each of the concave ribs 10'a abuts against the side wall of the mission case 6, creating a relatively wide gap 10 between the lower protector 10' and the mission case 6 near the ribs 10'a. 'c is now formed.

In FIG. 1, the reference numeral 19 is a resistance rod attached to the hitch 16, and the reference numeral 20 is an operating handle portion of the management machine 1.

Since this embodiment has the above-described configuration, even if a stone is caught between the side protector 12 and the rotor 9 during rotor work in a field where stones are mixed in as described above, the lateral pressure can be reduced. Since the thick and strong side protector 12 itself receives the pressure and does not transmit it to the inside, there is no chance of damage to the mission case 6 due to lateral pressure caused by stones being caught. Moreover, if the structure is as shown in FIG.
Even if a stone collides with the 0'b portion or its surrounding area, the impact is less likely to be directly transmitted to the lower portion of the mission case 6, thereby preventing damage to the mission case 6.

As explained above, according to the present invention, the axle portion 7 of the lower protector 10 of the transmission case 6
On both sides of the transmission case 6 in a range exceeding at least the radius of rotation of the rotor 9 from above,
A side protector 12 which is thicker than the lower protector 10 and has a flat plate shape is fixed to the lower protector 10 so as to partially overlap it, and the engine frame 2 is fixed to the front of the side protector 12, and the hitch 16 is fixed to the rear. Since it is fixed, the side protector 12 can be made into a thick plate-like member that is separate from the engine frame 2, etc., and despite its simple structure, the transmission case 6 can be easily damaged due to stones getting caught during rotor work. It becomes possible to reliably prevent this, and furthermore, the processing of the side protector 12 itself becomes extremely easy. In addition, the engine frame 2 and the like can be made of thin-walled and simple-shaped members, which makes it possible to reduce the weight of the entire management machine 1 and improve the durability of the transmission case 6. , a thick and flat side protector 12 that can avoid cost increase.
Furthermore, since the engine frame 2 and the hitch 16 are fixed, the strength of the fixed portions of the engine frame 2 and the hitch 16 can be improved, and the management machine 1 as a whole can be made to have a robust structure.

[Brief explanation of the drawing]

Fig. 1 is an overall side view showing a management machine to which the present invention is applied, Fig. 2 is an enlarged view of its main parts, Fig. 3 is a partially cutaway plan view seen from the rear (right side) of Fig. 2,
FIG. 4 is a diagram similar to FIG. 3 showing a partially modified example. 1... Management machine, 2... Engine frame, 6...
...Mission case, 7...Axle, 9...Rotor, 10...Lower protector, 12...Side protector, 16...Pitch.

Claims (1)

[Scope of Claim for Utility Model Registration] In the management machine 1, which is provided with a lower protector 10 made of a thin steel plate so as to cover substantially the lower half of the transmission case 6, at least the rotor A side protector 12, which is thicker than the lower protector and has a flat plate shape, is fixed to both sides of the mission case in a range that substantially exceeds the rotation radius of the transmission case 9 so as to partially overlap the lower protector, and The engine frame 2 is fixed in front of the protector 12, and the hitch 16 is fixed in the rear.
A protection structure for a transmission case for a management machine, which is characterized by a fixed structure.