JPS6024103A - Cultivation part in walking type agricultural vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tilling section of a walk-behind agricultural vehicle, in which a rotary shaft is driven in combination with a bevel gear transmission, and the direction of rotation of the rotary shaft is changed between normal rotation and reverse rotation. The position of the rotary axis, which is configured so that it can be switched,
It is configured so that the upper and lower ranks can be exchanged,
When the rotary shaft is located at the upper level, normal tilling work is performed using the normal tilling claws, and when the rotary shaft is located at the lower position, the deep tilling work is performed using the deep tilling claws, which have a larger diameter than the normal tilling claws. so that you can
The purpose of this invention is to propose a highly economical agricultural-type tiller that can effectively use a single agricultural-type tiller. The drive shaft has a transmission case for transmitting power to the rotary shaft, and the drive shaft extends obliquely downward from the upper rear of the transmission case. A bevel gear A is wedge-fitted onto the upper end of the drive shaft supported by the case, and a pair of bevel gears B and C that mesh with the bevel gear A have clutch pawls carved on the sides facing each other. The bevel gear B and the bevel gear C are loosely fitted on the switching shaft so that the switching pawl wedged on the switching shaft is slid from side to side, and is selectively engaged with the clutch pawl to be fitted. A forward/reverse switching device for the drive shaft, which consists of main parts such as a shift fork, is installed in the transmission case. A small bevel gear is wedge-fitted to the lower end, and a large bevel gear that meshes with the small bevel gear is fixed to the rotary shaft so that the rotary shaft is driven at right angles to the drive shaft. The upper end of the extended drive shaft is wedge-fitted to the lower end of the drive shaft that is supported by the case and positioned above or described above, and a small bevel gear is wedge-fitted to the lower end of the extended drive shaft. The upper end of the extended drive shaft case is removably fixed to the lower end of the case with bolts, etc., and the rotary shaft case is removably fixed to the lower end of the extended drive shaft case with bolts, etc., and the large bevel that meshes with the small bevel gear is attached to the lower end of the extended drive shaft case. The rotary shaft is supported by the rotary shaft case and positioned at a lower position so that the gear is fixed to the rotary shaft and the rotary shaft is driven at right angles to the drive shaft, and the shift fork is operated as described above. The rotary shaft is configured so that the direction of rotation of the rotary shaft can be switched between normal rotation and reverse rotation, and when the rotary shaft is located at the upper position, ordinary tilling claws are attached to the rotary shaft. If normal tillage work is possible and the rotary shaft is located at a lower position, deep tillage claws with a larger diameter than normal tillage claws are attached to the rotary shaft so that deep tillage work is possible. This invention consists in that the position of the rotary shaft can be changed to upper or lower positions.

In the following, the present invention will be specifically explained based on the illustrative drawings. In FIGS. 1 and 2, (21) indicates the prime mover (1), the transmission case (6), and the left and right running wheels (2).
・(2)', It is a walk-behind agricultural vehicle equipped with a handle (2), a tilling part (3), etc. A prime mover (11's power is provided by the engine pulley 123, an input pulley), ■Belt width), etc. The input shaft (2η
is transmitted. The fixed gear (support) (input shaft body), (a)
is fixed, and the fixed gear (A), G! The wheel axle (to) is driven via a transmission device (not shown) that selectively slides and engages with the wheel axle (30), and the left and right running wheels (2) and (2)' attached to the wheel axle (30) move in the direction of the arrow (I). ) or in the direction of the arrow (b), the agricultural type H moves forward or backward.

In addition, the input shaft (zi) includes a sliding gear (a+) for transmitting power to the rotary shaft (4) of the tilling section (3).
32) is slidably wedge-fitted, and the switching shaft (+4) l
It is configured to selectively slide and mesh with fixed gears (33) and G34) which are fixed to each other.

The switching shaft (14) has a bevel gear B (10) and a bevel gear C (
11) is loosely fitted, and the bevel gear B (10) and the bevel gear C
(11) Clutch pawl (1 go・(
+3) are arranged so as to face each other. In addition, a switching pawl (1ω) is wedge-fitted into the switching shaft (14J so that it can slide left and right).
and the clutch pawl (12) carved on the bevel gear C(u).
)・(13) and mesh, bevel gear B(10)
It transmits power in different rotational directions to the bevel gear A (91) which is always meshed with the bevel gear C (11).

(7) is a drive shaft, which extends obliquely downward from the upper rear part of the transmission case (6), and is arranged so that its center coincides with the left-right center line X-X of the aircraft. ing. The upper end of the drive shaft (7) is provided with a bevel gear A (9).
) is wedge-fitted, and a small bevel gear 0η is wedge-fitted at the lower end.

In this specification, the forward/reverse switching device is referred to as the above-mentioned switching shaft (+4), latch claw (12), Qa
) having a bevel, gear B00) and bevel gear C (11),
Switching pawl (15), shift fork (+6), bevel gear A
(9) and other main parts, and is a switching device for rotating the drive shaft (7) in different directions.

(8) is a drive shaft case of a tubular body, on which an upper flange (35) and a lower flange (36) are fixedly installed, and the drive shaft (7) is rotated through bearings (3η and (37)'). The upper flange (35) is fixed to the rear surface of the transmission case (6) with bolts (38), and the lower flange □
□□) is fixed with a bolt (39) to a rotary shaft case (5) which pivotally supports a rotary shaft (4). (+
81 is a large bevel gear fixed to the rotary shaft (4), which meshes with the small bevel gear (17) to rotate the rotary shaft (
The rotary shaft (4) is supported by the rotary shaft case (5) so that the rotary shaft (4) is driven in a position perpendicular to the drive shaft (7). (4 is a rotary frame fixed to the drive shaft case (8), and a rotary cover (43) and a hitch are installed. (4υ
is a plowing depth adjustment rod, and the plowing depth adjustment rod (46) is used to adjust the tillage depth (
44). (The reference numerals 40 are ordinary tilling claws attached to the left and right sides of the rotary shaft (4).

The above is a configuration in which the rotary shaft case is removably attached directly to the lower flange (36) provided at the lower end of the drive shaft case (8), and the rotary shaft (4) is located above. The operating state of this will be explained below. First, in normal tillage work, the transmission mechanism (not shown) is operated to mesh the gears of the transmission device (not shown) with the fixed gear (A), and the left and right running wheels (2) and (2)'
Rotate in the direction of arrow (A) and set the aircraft to move in the direction of arrow (G). On the other hand, sliding gear (31)
- Operate the speed change mechanism shown in (32) to change the fixed gear (
7))・(E))Select number B and engage the rotary shaft (4)
) to the desired rotation speed. and the rokuri axis (
4) is set to the direction of forward rotation e→.The operation is as follows: Move the shift fork (16) in the forward/reverse switching device in the direction of the arrow (river) and press the switching claw (15). ) and the clutch pawl (13) carved on bevel gear C (I+1).
The rotation direction of is set to normal rotation (c), and the tilling claw (4o) attached to the rotary shaft (4) is set to normal rotation (c).
The rotation is as follows.

Then, adjust the tilling depth adjustment rod (
Move up and down the hitch (
44) and operate the main Taranotile lever (26).
Ordinary tillage work is performed using the power of the prime mover (1) via a power disconnection mechanism (not shown). This state is used in all normal rotation directions, where the rotary shaft (4) rotates in the direction (c) in the same direction as the rotation direction (a) of the running wheels (2) and (2)'. be. This rotary axis (4
) To change the rotation from the normal rotation direction (C) to the reverse rotation direction (C), move the shift fork (ld) in the direction of the arrow (to) in the forward/reverse switching device described above and use the switching pawl. (15) is engaged with the clutch pawl (121) carved on the bevel gear B (+o).Then, the low clutch shaft (4) rotates in the direction of the reverse direction of the arrow.At this time, The tilling claws (4o) attached to the left and right sides of the rotary shaft (4) must be removed from the rotary shaft (4), swapped between the left and right sides, and then reattached to the reverse direction as shown by the tilling claws (40)') The orientation is set to correspond to the direction of .

When used for tilling work in hard fields, this rotation (in the opposite direction) allows stable tillage work without causing the so-called "danosing" phenomenon, in which the machine body flies forward, and also allows for stable tillage work when using the machine to remove compost, straw, etc. from the soil. It is also extremely useful for tillage work where the soil is buried in soil.

Next, in the present invention, the rotary shaft case (5) is removably fixed below the drive shaft case (8) via the extended drive shaft case (20) and the extended drive shaft (19). To explain the case of FIGS. 6 and 4 showing the case where the order 4) is set at the lower position, the upper end of the extended drive shaft (19) is wedge-fitted into the lower end of the drive shaft (7). , the extended drive shaft (19)
A small bevel gear (1η) is wedge-fitted into the lower end of the .

Then, the upper end of the extended drive shaft case 00 is removably fixed to the lower flange provided at the lower end of the drive shaft case (8) with a pole (39), etc., and the extended drive shaft case 00) The rotary shaft case (5
) is removably fixed with a port l39), and the small bevel gear (17) and large bevel gear (18) mesh to drive the rotary shaft (4).

Deep tilling claws (4υ) are attached to the left and right sides of the rotary shaft (4) configured in this manner, and deep tilling work is performed. (40) is set larger than the outer diameter of the rotary shaft (40), but because the position of the rotary shaft (4) has moved downward by the length of the extension drive shaft case (split length) ) can be installed without interfering with the rotary cover (43), left and right running wheels (2), (2)', etc. Therefore, the desired deep plowing claw (41) can be installed.
The lengths of the extended drive shaft case 00) and the extended drive shaft (19) are determined according to the outer diameter dimensions of the extended drive shaft case 00) and the extended drive shaft (19). Rotate such a large-diameter deep plowing claw (41) in the forward rotation direction (c).
This is because the deep tillage work performed by rotating the tiller is suitable for deep tillage work in fields with relatively soft soil such as sandy soil or seedling beds.

When stirring and burying compost etc., use deep plowing claws (4
If 1) is rotated in the reverse direction), there is an advantage that good stirring and burying work can be performed at the same time as deep tilling work. To switch to the reverse direction), move the shift fork 06) in the direction of the arrow (towards) and move the switching pawl (15) to the clutch pawl (1 This is possible by reversing the tilling claws (40) mentioned above, and the deep-tilting claws (41) can be set in the direction of the deep-ploughing claws (411') by swapping the left and right sides. It will be done.

As is clear from the above detailed description, in the present invention, not only the rotary shaft case but also the extension drive shaft case can be easily removed or accessed. The rotary shaft is configured so that the position of the rotary shaft can be changed between upper and lower positions.

Therefore, if tilling work with normal tilling claws is required, the rotary shaft should be set in the upper position, and if deep tilling work with deep tilling claws with a larger diameter than normal tilling claws is required, the rotary shaft should be set in the upper position. By setting the lower position, it is possible to perform plowing work at different desired plowing depths with one agricultural vehicle. By simply replacing the case, a single agricultural vehicle can perform the work of two agricultural vehicles, resulting in an extremely economical and efficient agricultural vehicle.

[Brief explanation of the drawing]

The attached drawings are drawings illustrating embodiments of the present invention, and FIG. 1 is a side view of a walk-behind agricultural vehicle equipped with a tiller according to the present invention during tilling work, and FIG. FIG. 5 is a side view of a walk-behind agricultural vehicle equipped with another type of tillage unit according to the present invention during deep tillage work, and FIG. 4 is a plan sectional view of the main parts in FIG. 6. FIG. In these drawings, (11 is the prime mover, (2) and (2)
)' are left and right running wheels, (3) is a tiller, (4) is a rotary shaft, (5) is a rotary shaft case, (6) is a transmission case, (7) is a drive shaft, (8) is a drive shaft Case, (9) is bevel gear A, (+0) is bevel gear B 1
(n) is the bevel gear C1 (1, (13) is the clutch pawl,
(14) is the switching shaft, (+5) is the switching claw, (16) is the shift fork, (lη is the small bevel gear, (+81 is the large bevel gear, (19) is the extended drive shaft, (20 is the extended drive shaft case) , (40) is tilling claw, (41) is deep tilling claw,
-X is the left and right center line of the aircraft. Patent applicant name

Claims (1)

[Claims] The power of the prime mover (1) is transferred to the left and right running wheels (2) and (2)'
and a transmission case (6) for transmitting power to the rotary shaft (4) of the tilling section (3), and a drive shaft (7) extending obliquely downward from the upper rear part of the transmission case (6). )
The drive shaft (7) is supported by the drive shaft case (8) so that its axis coincides with the left-right center line A pair of bevel gears B (IG) and bevel gear C (11) that are fitted and meshed with the bevel gear A (9) have clutch pawls (12) and (1 The bevel gear B (10 and bevel gear C01) are loosely fitted on the switching shaft (14) so as to face each other, and the switching pawl (switching pawl) wedged in the switching shaft (14) is slid from side to side, clutch pawl (12)・(
13) Shift fork 0 to select and engage
A forward/reverse switching device for the drive shaft (7), which is composed of main parts such as It is removably attached to the drive shaft (7
A small bevel gear (17) is wedge-fitted into the lower end of the small bevel gear 07), and a large bevel gear (18J) meshing with the small bevel gear 07
4), and the rotary shaft (4) is fixed to the drive shaft (7).
The rotary axis (
4) is supported by the rotary shaft case (5) and set at an upper position, or the upper end of the extended drive shaft (19) is wedge-fitted to the lower end of the drive shaft (7), and the extended drive shaft A small bevel gear (lη) is wedge-fitted into the lower end of the drive shaft case (19), and the upper end of the extended drive shaft case QO is removably fixed to the lower end of the drive shaft case (8) with a bolt (39), etc., and the extension A rotary shaft case (5) is removably fixed to the lower end of the drive shaft case (support) with a bolt (crystal), and the large bevel gear (17) meshes with the small bevel gear (17).
81 is fixed to the rotary shaft (4), and the rotary shaft (4) is supported by the rotary shaft case (5) so that the rotary shaft (4) is driven at right angles to the drive shaft (7). The above-mentioned shift fork (16) is operated so as to be located at the lower position of the rotary shaft (4). When the rotary shaft (4) is located at the upper position, normal tilling work can be performed by attaching the normal tilling claws (40) to the rotary shaft (4), and the rotary shaft (4) If the rotor is located in the lower position, then the rotor! 7@1I (41) is equipped with a deep plowing claw (41) with a larger diameter than the normal tilling claw (4o), so that deep tilling work is possible. A tilling section in a walk-behind agricultural vehicle, characterized in that the lower part is replaceable.