JPH0446481Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The invention relates to a self-propelled tiller that plows farmland while running on its own, and is particularly suitable for plowing sloped land or stone-lined land. It is effective to use.

BACKGROUND TECHNOLOGY AND PROBLEMS Recently, self-propelled tillers, which mechanically perform the same work as hoe plowing continuously and efficiently, and are capable of plowing relatively deeply, have become popular.

As self-propelled tillers have become more widespread, their range of use has expanded from relatively wide, flat fields to narrow slopes and areas with many stones in the soil.

However, the hoe tips of the tillage hoe in this self-propelled tiller are usually branched into 3 to 4 branches, so when large stones etc. are buried in the soil of the field, the center hoe tip If only the right or left hoe tip hits the stone, as shown in Figure 6, the loom tilts to one side and floats up.

In addition, in order to prevent the machine from tipping over when working on slopes, if the tiller is equipped with an inclination adjustment device that steps the axis of the wheel on the left and right sides, the hoe tip on the mountain side should be adjusted as shown in Figure 7. Because it hits the ground first,
A force is generated that tries to topple the aircraft.

If these phenomena occur in an almost stationary state, the worker can support himself with his whole body, but in plowing work, the plowing hoe is used several times a second to once every few seconds. Since the work is carried out by penetrating into the ground to some extent, the handle that the operator holds constantly shakes significantly from side to side, making it extremely difficult to operate the machine stably. In some cases, a situation may occur where the device cannot be supported and falls down, causing work to be interrupted.

Purpose of the invention Therefore, the present invention aims to improve the plowing hoe in a self-propelled tiller to ensure stable operation of the machine both on slopes and between rocks.

Summary of the invention Therefore, in order to achieve the above object, the present invention is installed on a tiller having drive wheels on both left and right sides.
A tillage hoe that is pivotally connected to the operating crank of the machine and can cause approximately elliptical motion in the vertical direction by the rotation of the operating crank, and has multiple hoe blades with only the central hoe tip being elongated. It is characterized by being a plowing hoe for a self-propelled tiller, consisting of a hoe tip.

Embodiment Next, the present invention will be described with reference to an illustrated embodiment of a self-propelled tiller equipped with an impact tillage body that penetrates into the soil by striking a tillage hoe.

1 denotes the tiller main body, 1 is a frame of the main body a, a front wheel 2 is rotatably supported at the lower front end of the frame, a reducer 3 is mounted in the middle, and left and right drive wheels 4 are mounted at the rear end. Installation: A control handle 5 is installed at the front of the upper part, and clutch levers 6, 7 and an accelerator lever 8 are installed on both gripping parts. A locking device is provided which can be secured in the working position.

9 is an engine mounted on the front of the frame,
A belt 14 is stretched between one side 11a of the double pulley 11 of the driving shaft 10 and the pulley 13 of the input shaft 12 at the upper end of the reducer 3, and the belt 14 is stretched between the other side 11b and one side of the double pulley 16 of the intermediate shaft 15, which will be described later. The belt 17 is loosely suspended.

Note that the reducer 3 is commercially available as a transmission with a side clutch, and the power transmitted from the input shaft 12 is transmitted to the left and right output shafts 18 and 19 at the lower end.
(On the drawing, the output shafts 18 and 19 coincide and only one appears, but 18 is on the front side of the paper and 19 is on the opposite side.
The deceleration is transmitted independently to each of the clutch levers 6, 7 and the wires 20, 21, and is connected to the clutch levers 6, 7 and the wires 20, 21, and is built into a not-illustrated reducer. It is configured so that it can be in the off (Look) state.

The rotation of the output shaft 18 of the reducer 3 is controlled by the sprocket 2.
2. Chain 23, input shaft 2 of second reducer 24
5, output shaft 26, sprocket 27, reduction shaft 2
8, is transmitted to the drive wheels 4 via the sprocket 29, chain 30, and sprocket 31.

32 is an operating crank supported on the rear part of the frame 1, and a chain 36 is spanned between a large sprocket 34 fixed to the crankshaft 33 and a sprocket 35 fixed to the output shaft 19 of the reducer 3.

Further, a tension clutch cam 37 is fixed to one side of the crankshaft 33.

Reference numeral 38 denotes a link whose base end is pivotally supported by a support shaft 39 at the lower rear end of the frame 1, and a horizontal rod 40 protruding laterally from its tip and left and right operating cranks 3.
The upper and lower ends 42 and 43 of the tiller mounting rod 41 are pivotally connected to the center between 2 and 32, respectively.

b indicates a percussion cultivating body fixed to the rear surface of the mounting rod 41, and 44 indicates a crankcase 45 and a cylinder 4.
6 is integrated, and 47 is a striking crank mechanism using an eccentric, in which an eccentric disc 49 of a rotating shaft 48 mounted on a bearing (not shown) is pivoted to a head ring 50a of a connecting rod 50. , the lower part of the rod 50 is pivotally connected to a hammer 51.

52 is a plowing hoe, and an interlocking rod 54 that bored a groove 53
is protruded from the top, and the lower part is branched into three hoe tips.In particular, the center hoe tip 55a is connected to the left and right hoe tips 55b.
It is long compared to .

Then, the interlocking rod 54 is inserted from the lower side of the cylinder 46, and the hole drilled in the cylinder 46 and the slot 53
A pin 56 is inserted into and attached to the machine casing 44, and the rod 54 is interlocked with the vertical movement of the hammer 51 within the length of the slot 53. Further, the lower end surface 46a of the cylinder 46 and the collar portion 54 of the interlocking rod 54
a is configured to collide freely.

Reference numeral 57 denotes a roller pivotally supported at the tip of a clutch arm 58 that contacts the tension clutch cam 37. The clutch arm 58 is pivoted at its middle side to the frame 1 and swings in accordance with the shape of the cam 37.

59 is a tension roller pivoted to the tip of a tension arm 60 whose middle side is pivotally connected to the frame 1; 61 is a connecting arm connecting the clutch arm 58 and the tension arm 60; and 62 is a roller 5.
7 to the tension clutch cam 37 at all times, and the rotation of the cam 37 causes the clutch arm 58 to swing, and the tension arm 60 to swing accordingly. Pulley 11b and pulley 1 of intermediate shaft 15
The belt 17, which is loosely suspended between the belt 17 and the engine 6, is tensioned and relaxed, and the rotation of the engine 9 is timed on and off depending on the position of the tension clutch cam 37, that is, the position of the operating crank 32.

63 is a bent base rod whose one end is pivotally connected to the intermediate shaft 15 via a bearing, and 64 is a bent tip rod whose one end is pivotally connected to the rotating shaft 48 of the percussion cultivating body b via a bearing. The other ends of the rods 63 and 64 are pivotally connected to each other, and a double pulley 66 is attached to the intersecting shaft 65.
, the pulley 67 is fixed to the rotating shaft 48, and the pulley 1
A belt 68 is stretched between 6 and 66, and a belt 69 is stretched between pulleys 66 and 67 to transmit the driving force to the impact cultivating body b.

Operation First, after putting the machine into the field to be plowed and starting the engine 9, for example, if the clutch lever 6 for running, which is located on the right side, is released from its gripped and locked state, the machine will be connected to it. wire 2
0 is relaxed, the traveling system clutch (not shown) in the reducer 3 changes from the disengaged state to the on state, and the rotation of the driving shaft 10 of the engine 9 is controlled by the double pulley 11a,
Belt 14, pulley 1 of input shaft 12 of reducer 3
3. Sprocket 22 of output shaft 18, second reduction gear 24, sprocket 27, sprocket 29 of reduction shaft 28, chain 30, sprocket 31
The signal is then transmitted to the left and right drive wheels 4, and the machine begins to travel in the direction of the arrow in FIG.

At this time, if the tillage clutch lever 7 located on the left side is also released from the gripped and locked state, the wire 21 connected to it is relaxed and the tillage system clutch (not shown) in the reducer 3 is also engaged. The rotation of the driving shaft 10 of the engine 9 is caused by the double pulley 11.
a, belt 14, pulley 13, sprocket 35 of output shaft 19, chain 36, large sprocket 3
4, and the operating crank 32 begins to rotate.

When the operating crank 32 rotates, the tillage body mounting rod 41 with the impact tillage body b rotates back and forth around the horizontal rod 40 as a fulcrum, and the link 38
The plow tips 55a and 55b of the impact tillage body b perform a substantially elliptical movement in the vertical direction.

At this time, the tension clutch cam 37 swings the clutch arm 58 via the rollers 57 that are in contact with it, and this swing is transmitted to the tension arm 60 via the connecting arm 61. By swinging, the tension roller 59 pivotally attached to the tip thereof repeatedly tensions and loosens the belt 17 loosely suspended between the pulleys 11b and 16 of the driving shaft 10 and intermediate shaft 15 of the engine 9. When the belt 17 is tensioned by the tension roller 59, the rotation of the driving shaft 10 of the engine 9 is transmitted through the double pulley 16, the belt 68, the double pulley 66 of the cross shaft 65, the belt 69, and the pulley 67 of the impact cultivator b. The signal is transmitted to the rotating shaft 48.

When rotation is transmitted to the rotating shaft 48, the eccentric disk 49
rotates eccentrically within the crankcase 45, and the hammer 5
1 moves up and down inside the cylinder 46. Then, when the hammer 51 hits the top of the interlocking rod 54, the rod 5
4 drops impulsively until the upper end of the slot 53 abuts the pin 56. Then, the machine casing 44 descends due to the weight of the machine body and the rotation of the operating crank 32, and the lower end surface 46a of the cylinder 46 and the flange 54a of the interlocking rod 54
The action of colliding with the drum, giving a second strike, returning to the original state, and striking again with the hammer 51 is repeated continuously.

During this time, the hoe tips 55a and 55b of the tillage hoe 52 receive this beating and penetrate deep into the soil, but when the operating crank 32 rotates and comes to approximately the bottom dead center, the tension arm 60 The tension roller 59 relaxes the belt 17 and cuts off the rotational transmission to the impact cultivating body b.

At the same time, as the operating crank 32 rotates upward, the impact plowing body b also moves upward, and the hoe tip 55a,
55b digs up the clod of soil behind the position he just infiltrated in order to reverse the plowing process.

When the hoe tips 55a and 55b infiltrate into the soil, the center hoe tip 55a hits the ground first, and then the left and right hoe tips 55b and 55b infiltrate into the soil. Resistance only arises against one hoe tip. For this reason, the initial infiltration into the ground is carried out extremely smoothly.

At the time when the left and right hoe tips 55b and 55b penetrate into the soil, the center hoe tip 55a has already penetrated into the soil and acts like a stake, so an eccentric load is applied to one side. Easy left and right hoe tips 55
b, 55b, stability is ensured when penetrating into the soil.

As shown in FIGS. 4 and 5, this is particularly noticeable on sloping land and stone-covered land.

For example, when cultivating a tea field deeply, the space between the tea ridges is narrow, the ground is extremely uneven, the surface is relatively soft but there are many stones in the soil, and the entire field is sloped. This makes it possible to perform extremely stable plowing work.

In the embodiments described above, the plowing hoe was struck to penetrate the soil, but the invention is not limited to this.
A tillage hoe is one that causes a substantially elliptical movement in the vertical direction by the rotation of an operating crank, and is caused to penetrate into the soil by the rotational force at that time.
For example, it goes without saying that even if the tillage hoe 52 is directly fixed to the tillage body attachment rod 41 in the embodiment described above, it can be similarly applied.

Also, if the hoe has an even number of branches,
The two in the center may be made long.

Effects of the invention The tillage hoe in the self-propelled tiller of the present invention is attached to a tiller having left and right drive wheels, is pivotally connected to the operating crank of the machine, and is driven by the rotation of the operating crank. It is characterized by being made up of multiple hoe tips, with only the central hoe tip being elongated, which causes approximately elliptical movement in the vertical direction, so it is suitable for both slopes and stone fields. The pilot takes the lead in going underground, and when the left and right hoe tips go underground, the aircraft is less likely to sway from side to side, making it possible to continue stable operation.

[Brief explanation of drawings]

Figure 1 is a left side view of a self-propelled tiller equipped with the plowing hoe of the present invention, Figure 2 is a rear view of the main parts, and Figure 3 is a diagram of the main parts. Sectional right side view,
Figure 4 is a state diagram of the tillage hoe of the present invention and the left and right drive wheels when used on a slope.
Figure 6 shows the condition of a conventional tillage hoe and left and right drive wheels when it is used on a rocky area, Figure 7 shows a diagram of the condition of a conventional tillage hoe and left and right drive wheels when used on a sloped area. It is the same state diagram when it is used. a... Cultivator main body, b... Impact cultivating body, 1...
Frame, 4...Right and left drive wheels, 9...Engine, 32...Operation crank, 38...Link, 4
1...Plowing body attachment rod, 55...Plowing hoe, 55a...
...center hoe tip, 55b...left and right hoe tips.

Claims (1)

[Scope of utility model registration request] A tillage hoe that is attached to a tiller having drive wheels on both left and right sides, is pivotally connected to an operating crank of the tiller, and is capable of causing approximately elliptical movement in the vertical direction by rotation of the operating crank, A plowing hoe for self-propelled tillers, consisting of multiple hoe tips with only the central hoe tip being long.