JPH054802U - Gauge wheel mounting structure for rotary tiller - Google Patents

Abstract

(57) [Summary] [Structure] An upper cover 4 which covers the upper part of the tilling part 3 is fixed to the rotary machine frame 2, and the tilling part 3 is provided behind the upper cover 4.
A rear cover 5 covering the rear of the rear cover 5 is pivotally supported, and a pair of left and right gauge wheels 6 for setting the plowing depth of the tilling portion 3 is arranged on the rear side of the rear cover 5, and the columns 7 of the gauge wheel 6 are connected to each other. The gauge wheel holder 8 is attached to the holder 8 so that the vertical position thereof can be adjusted, and the gauge wheel holder 8 is fixed to the rear end of the support arm 9 protruding rearward from the left and right rear side portions of the upper cover 4. [Effect] The rotary machine frame 2 does not require a height adjusting mechanism for the gauge wheel 6 and a mast for mounting the gauge wheel 6, and there is no rotary cultivator protruding upward from the rotary machine frame 2, which is low. It is possible to enter under branches, shelves, etc., which makes it easy to turn inside a greenhouse, and also reduces damage to crops.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a gauge wheel mounting structure for a rotary cultivator, which is mainly used for weeding work in orchards.

[0002]

[Prior Art]

 For example, in a conventional two-point link connection type rotary cultivator, as shown in FIG. 5, an upper cover 4 which covers the upper part of the cultivating part 3 is fixed to the rotary machine frame 2, and the rear part of the upper cover 4 is cultivated. The rear cover 5 covering the rear of the section 3 is pivotally supported, and a pair of left and right gauge wheels 6 for setting the plowing depth of the tilling section 3 is arranged on the rear side of the rear cover 5, and the support arm 12 of the rotary machine frame 2 is arranged. The front end of the gauge wheel support frame 13 is pivotally supported on the mast wheel support frame 13, and the columns 7 of the gauge wheel 6 are fixed to the left and right rear ends of the gauge wheel support frame 13, and the mast 14 and the gauge wheel support frame 13 which are erected from the rotary machine frame 2 are fixed. A height adjusting mechanism 15 is provided between the above and the above.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional technology, there is no problem as long as it is used in the field, but when the branches and fences of the orchard are relatively low and overhang, and when there is a low roof such as a greenhouse, the mast 14 and Since the height adjusting mechanism 15 and the like are obstructive, there are problems such that it cannot be put under branches or fences, making it very difficult to turn inside a vinyl house or damaging crops.

According to the present invention, a gauge wheel is supported by a gauge wheel holder in a vertically adjustable manner, and a support arm having the gauge wheel holder attached to a rear end is fixed to an upper cover to adjust a mast and a height. By eliminating the mechanism, etc., the upper part of the rotary tiller can be cleaned, and even if the branches and fences of the orchard etc. are relatively overhanging, they can be placed below them without damaging the crops. An object of the present invention is to provide a gauge wheel mounting structure for a rotary cultivator capable of solving the above-mentioned problems of the prior art.

[0005]

[Means for Solving the Problems]

 The concrete means for solving the problem in the present invention is to fix an upper cover 4 which covers the upper part of the tillage part 3 to the rotary machine frame 2, and a rear cover 5 which covers the rear of the tiller part 3 at the rear part of the upper cover 4. A pair of left and right gauge wheels 6 for setting the tilling depth of the tiller 3 is arranged on the rear side of the rear cover 5 so that the pillar 7 of the gauge wheel 6 can be vertically adjusted in the gauge wheel holder 8. In the structure for mounting the gauge wheel of the rotary cultivator attached to the above, the gauge wheel holder 8 is fixed to the rear end of the support arm 9 protruding rearward from the left and right rear side portions of the upper cover 4.

[0006]

[Action]

 The left and right rear parts of the upper cover 4 are close to the part fixed to the rotary machine frame 2, and the support arms 9 are fixed to the left and right rear parts of the upper cover 4, so that a strong fixation can be obtained. The support 7 of the gauge wheel 6 is attached to the fixed gauge wheel holder 8, and the position of the gauge wheel 6 can be adjusted in the vertical direction.

Therefore, the rotary machine frame 2 does not require a height adjusting mechanism for the gauge wheel 6 and a mast for mounting the gauge wheel 6, and the rotary cultivator projects rearward and upward from the rotary machine frame 2. It becomes possible to get into the bottom of a low branch, etc.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 1 to 3, 21 is an agricultural tractor, which is equipped with a hydraulic device 22 for raising and lowering the working machine in the upper rear part, and a rotary cultivator 24 is mounted via a two-point link mechanism 23. It can be raised and lowered. 25 indicates a rear wheel.

In the rotary cultivator 24, the transmission case 28 and the side frames 29 are fixed to both ends of the support arm 27 protruding from the gear case 26 to the left and right to form the rotary machine frame 2. The claw shaft 30 is rotatably supported about the horizontal axis between the lower part of the side frame 29 and the side frame 29, and a large number of tilling claws 31 are attached to the claw shaft 30 to form the tilling part 3.

Reference numeral 34 denotes a rotary cover, which fixes an upper cover 4 which covers the upper part of the tillage part 3 to the transmission case 28 and the side frame 29, and a rear cover 5 which covers the rear of the tiller part 3 at the rear part of the upper cover 4. A side cover 32 and a rear cover 33, which are pivotally supported and cover the sides of the tillage section 3, are provided. A mountain-shaped lateral reinforcing member 36 is fixed to the upper rear portion of the upper cover 4, and a pair of left and right vertical ribs 37 is provided on the rear cover 5. Notches 38 for escape of the gauge wheel are formed in the lower left and right rear portions of the rear cover 5.

A lowering mechanism 40 has a front end of a rod 43 connected to a bracket 41 provided on the left and right support arms 27 via a pin 42, and a rear portion of the rod 43 has a bracket 44 erected from a rear cover 5. The shaft member 45 pivotally supported by the rod 43 penetrates the shaft 43, and stoppers 46 and 47 are attached to the middle and rear portions of the rod 43 so that the position of the rod in the longitudinal direction can be adjusted. A coil spring 48 is fitted on the rod 43 between the two parts to hang down the rear cover 5.

The front part of the support arm 9 is fixed to the left and right rear parts of the upper cover 4 by fastening or welding via bolts 51, and is attached to the rear end of the support arm 9 protruding rearward from the upper cover 4. Has a gauge wheel holder 8 fixed thereto. The gauge wheel holder 8 is formed of a cylinder, and its axis is substantially vertical. The support 7 that rotatably supports the gauge wheel 6 is inserted into the lower portion of the gauge wheel holder 8, and the pin 50 is fixed through the pin hole 49 formed in both of them. There are a plurality of pin holes 49 in both of them, and the pitches thereof are deviated, so that the vertical position of the gauge wheel 6 with respect to the gauge wheel holder 8 can be adjusted in a plurality of steps.

The support column 7 is divided into two in the middle, and the gauge wheel 6 is a caster wheel rotatable around the support column 7. It should be noted that the present invention is not limited to the above embodiment, but can be variously modified. For example, the gauge wheel mounting structure may be applied to a rotary cultivator equipped with a three-point link. In this case, a mast that connects the top links is required, but it is not an obstacle. Further, the left and right support arms 9 may be connected in the middle or the rear part, or the upper cover 4 may be connected to the support arm 12 in the middle of the left and right.

FIG. 4 shows an example of the air breather of the transmission case 28. Reference numeral 52 denotes a transmission shaft to which power is transmitted from the tractor. A sprocket 53 is fixed to the end of the transmission shaft, and a chain 54 for transmitting power to the claw shaft 30 is hooked on the sprocket 53. Is stored in. Oil is injected into the transmission case 28, and when the sprocket and the chain 54 rotate at high speed, the internal pressure rises. Therefore, an air breather 56 is provided to release the internal pressure.

The air breather 56 is hollow and has a chamber 57 inside. A slit 59 is formed in the inner wall 58, an oil escape hole 61 is formed in the lower portion of the peripheral wall 60, and an air escape hole 63 is formed in the upper portion of the outer wall 62. ing. The oil diffused in the transmission case 28 is prevented from entering the chamber 57 by the inner wall 58 of the air breather 56, and when the internal pressure rises, the air and the oil in the chamber 57 are separated from the slit 59. Escape to. The air entering the chamber 57 is separated from the oil while hitting the inner peripheral surface of the chamber, escapes from the air escape hole 63, and the oil escapes from the oil escape hole 61 and is returned to the transmission case 28.

According to the air breather 56, it is possible to suppress an increase in the internal pressure in the transmission case 28, and to prevent oil from leaking to the outside.

[0017]

[Effect of the device]

 According to the present invention described in detail above, the upper cover 4 that covers the upper part of the tillage part 3 is fixed to the rotary machine frame 2, and the rear cover 5 that covers the rear of the tiller part 3 is pivotally supported at the rear part of the upper cover 4. Then, a pair of left and right gauge wheels 6 for setting the tilling depth of the tiller 3 is arranged on the rear side of the rear cover 5, and the column 7 of the gauge wheel 6 is vertically adjustable in the gauge wheel holder 8. Since the gauge wheel holder 8 is fixed to the rear end of the support arm 9 projecting rearward from the left and right rear side portions of the upper cover 4, the rotary machine frame 2 has a high height for the gauge wheel 6. This eliminates the need for a height adjustment mechanism and a mast for attaching it, and there is no rotary cultivator that projects upward from the rotary machine frame 2. It is possible to enter under a low branch, shelf, etc. It ’s easier to turn inside And also to reduce that damage the crops.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view showing an embodiment of the present invention.

FIG. 2 is a rear perspective view of the same.

FIG. 3 is a side perspective view of the same.

FIG. 4 is a cross-sectional view showing an example of an air breather of a transmission case.

FIG. 5 is a side view showing a conventional technology of a rotary cultivator.

[Explanation of symbols]

 2 Rotary machine frame 3 Tillage section 4 Top cover 5 Rear cover 6 Gauge wheel 7 Strut 8 Gauge wheel holder 9 Support arm

Claims (1)

[Claims for utility model registration] [Claim 1] An upper cover (4) is fixed to the rotary machine frame (2) to cover the upper part of the tilling part (3), and the tilling part (4) is attached to the rear part of the upper cover (4). 3) A pair of left and right gauge wheels (6) pivotally supporting the rear cover (5) covering the rear of the rear cover (5) and setting the tilling depth of the tiller (3) to the rear side of the rear cover (5).
In the gauge wheel mounting structure of the rotary cultivator, in which the column (7) of the gauge wheel (6) is attached to the gauge wheel holder (8) so that the vertical position can be adjusted. A gauge wheel mounting structure for a rotary cultivator, characterized in that it is fixed to the rear end of a support arm (9) protruding rearward from the left and right rear sides of the cover (4).