JPS6136409Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a protection device for a transmission case that supports a rotary drive shaft such as a tiller rotor.

Generally, covers are provided on the left and right sides of the lower part of the transmission case to prevent damage and wear caused by the rotary tilling rotor, etc., but since these covers are placed in contact with the outer surface of the transmission case, they prevent soil from being blown away by the rotating rotor. There is a risk that foreign matter such as grass being carried around may enter the transmission case portion from the edge of the cover and cause the above-mentioned damage. This invention specifically aims to prevent foreign matter from entering beyond the upper edge of the cover, and the following technical measures were taken. That is, the left and right covers 3, 3 formed of thin sheet metal so that they can be fitted externally from the left and right to the lower parts of the transmission cases 2, 2 that horizontally support the drive shaft 1 are attached to the lower parts of the transmission cases 2, 2 with bolts 7, 7, . . .
8, 8 to surround the entire lower part of the transmission cases 2, 2, and the vertical walls of the frames 5, 5 provided on the transmission cases 2, 2 so as to place and fix the engine 4 on the upper parts of the left and right covers 3, 3. A transmission case protection device for a mobile agricultural machine is constructed so as to overlap the inner surfaces of the transmission cases 2, 6 and to be sandwiched between the transmission cases 2, 2 and the vertical walls 6, 6 of the frame.

An embodiment of this invention will be described based on the drawings.

Reference numeral 2, 2 is a transmission case formed into left and right halves, facing each other so as to abut on the left and right sides, and having the peripheral edges tightened by a plurality of bolts 7, 7...nuts 8, 8..., which transmits the power from the engine 4 to the inside of the case. 2, 2 It has a transmission mechanism for transmitting power to the rotor 9 shaft 1 which is supported and protrudes from the left and right sides of the lower part.

A handle frame 10 base is provided on the upper part of the transmission cases 2, 2 so as to be freely changeable in the front and rear directions around the vertical axis, and a handle rod 11 is connected to the end of the handle frame 10 so as to freely adjust the vertical movement.

Furthermore, a pair of engines 4 each having a cross-section of
The rear walls 6, 6 of the frames 5, 5 are brought into contact with each other, and the bolts 7, 7, nuts 8, 8, . . . are tightened together. In addition, since the peripheral tightening parts of the transmission cases 2, 2 that are joined together are narrower in left and right width than other parts, the parts where the bolts 7, 7 of the frames 5, 5 are inserted are drawn. The vertical walls 6, 6 of the frames 5, 5 are formed to make surface contact with the side surfaces of the transmission cases 2, 2.

Reference numeral 12 denotes a belt cover, which covers the belts, pulleys, etc. that are to transmit power from the engine 4 to the transmission mechanism section inside the transmission cases 2, 2. Reference numeral 13 denotes a change lever that switches the transmission mechanism between forward and backward movement of the aircraft and high and low speed positions, and like the handle frame 11, it is provided so as to be freely changeable forward and backward around the vertical axis.

A pair of covers 3, 3 formed of thin sheet metal on the left and right sides of the lower half of the transmission cases 2, 2, with the front and rear and lower end peripheries matching the peripheries of the transmission cases 2, 2.
are tightened and fixed using the bolts 7, 7...8, 8... This pair of covers 3, 3 has a structure in which both end surfaces are in contact with each other and face each other at the joining edges of the transmission cases 2, 2, and surround the entire circumference of the lower half of the transmission cases 2, 2. Also, like the frames 5, 5, the bolts 7, 7... are drawn at their insertion points to reduce the distance between the left and right opposing portions.

Further, the covers 3, 3 are constructed in a symmetrical shape so that they can be attached to each side of the transmission cases 2, 2 while being changed from front to back.

In addition, each upper part of the covers 3, 3 is connected to the transmission case 2,
2 and the above-mentioned frames 5, 5, and vertical walls 6, 6 are sandwiched together, and these three members are fastened together by bolts 7 at the front upper part. In this case, the outer surfaces of the covers 3, 3 and the inner surfaces of the vertical walls 6, 6 of the frames 5, 5 are joined with no gaps at all.

14 is a hole for inserting the drive shaft 1 formed in the covers 3, 3, and 15 is a hole for a drain plug.

The connection hitch 16 provided at the rear of the transmission cases 2, 2 is used to attach and detach resistance rods and other various working devices. Reference numeral 17 denotes a rotor cover that extends to the sides of the frames 5, 5.

In the above configuration, when the drive shaft 1 is rotated, the rotor 9 is rotated to plow the soil and at the same time advance the machine.

Even if soil is scattered to the transmission cases 2, 2 side due to the rotation of the rotor 9, or even if the rotor 9 carries around foreign objects such as grass or pebbles, the transmission cases 2, 2 will not cover the cover 3,
Since the lower half is surrounded by the covers 3, it will not be directly damaged, and even if the front edges of the transmission cases 2, 2 move through the soil, they will be protected by the covers 3, 3 in the same way.

Note that if the covers 3, 3 become deformed, damaged, or worn, they should be replaced as appropriate.

Since this invention has the above structure, it has the following technical effects. That is, in this invention, left and right covers formed of thin sheet metal are attached with bolts to the lower part of the transmission case so that they can be fitted from the left and right to the lower part of the transmission case that horizontally supports the drive shaft, and the entire lower circumference of the transmission case is covered. The upper parts of the left and right covers of the enclosure are arranged so as to overlap the inner surface of the vertical wall of the frame provided on the transmission case so as to place and fix the engine, and to be sandwiched between the transmission case and the vertical wall of the frame. When attaching and detaching the left and right covers from the transmission case, the covers are moved laterally to the left and right, so even if the outer surface of the transmission case has a complicated shape, the left and right covers that cover the transmission case can be easily formed. Since the upper left and right sides are sandwiched between the transmission case and the vertical wall of the frame, soil scattered toward the transmission case due to the rotation of the rotor can go over the upper edge of the cover. There is no risk of foreign matter entering the inside and corroding the transmission case or damaging the transmission case due to foreign matter being carried around by the rotor, and the cover itself is reinforced to prevent distortion of the cover.

[Brief explanation of the drawing]

The figures show an embodiment of this invention; FIG. 1 is a side view, FIG. 2 is a partially enlarged view, and FIG. 3 is a rear view. In the figure, 1 is a drive shaft, 2, 2 is a transmission case, 3,
3 is a cover, 4 is an engine, and 5, 5 is a frame.

Claims (1)

[Scope of utility model registration request] Left and right covers formed of thin sheet metal are attached to the bottom of the transmission case with bolts so that they can be fitted externally from the left and right to the bottom of the transmission case that horizontally supports the drive shaft, and the left and right covers surround the entire lower part of the transmission case. A protection device for a transmission case of a mobile agricultural machine, the upper part of which is sandwiched between the transmission case and the vertical wall of the frame by overlapping the inner surface of the vertical wall of the frame provided on the transmission case so as to mount and fix the engine.