JPH09191702A - Two-axle axle-rotor type small-sized managing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-axle axle-rotor type small-sized managing machine enabling stable tilling work, having a compact structure to reduce the weight and the size and maneuverable in high operability in tilling work. SOLUTION: A front tine driving shaft 2 and a rear tine driving shaft 3 rotating in opposite directions and parallelly extended to the right and left are placed at the front and rear positions of a gear case 1 and a handle lever 4 is extended backward from the machine body. In a small-sized managing machine having the above construction, an engine E is mounted above a transmission cylinder 5 vertically erected from the longitudinal middle part of the gear case 1. A worm gear 7 is attached to a transmission shaft vertically extended from a side of the engine E through the transmission cylinder 5 toward the inside of the longitudinal middle part of the gear case 1. A front worm wheel 8 and a rear worm wheel 9 fixed to the front tine driving shaft 2 and the rear tine driving shaft 3, having the same diameter and placed in the gear case 1 are engaged with the front and back faces of the worm gear 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-axle axle rotor type compact management machine capable of cultivating a field with a two-axle axle rotor.

[0002]

2. Description of the Related Art Conventionally, two front and rear pawl drive shafts, which extend to the left and right sides of a gear case in parallel to each other and extend in parallel to each other and have different rotational directions from each other, are mounted on the gear case. In a small-sized management machine configured by extending a handle rod to the rear, as seen in Japanese Patent Publication No. 55-32321, either of the front and rear tillage claw groups provided on the front claw drive shaft and the rear claw drive shaft, respectively. It is known to move the center of gravity of the crab forward and backward, and as seen in Japanese Patent Laid-Open No. 7-87801, the tiller claw provided on the front claw drive shaft is used to move the machine forward. It is also known to raise the upper part of the machine to lift the tilling claw from the field and to retract it by reversing the small tilling claw provided on the rear claw drive shaft.

[0003]

However, in the prior art disclosed in Japanese Patent Publication No. 55-32321, the engine is mounted on the upper front side of the gear case, so that the balance in the front-rear direction of the machine body is poor, and the steering wheel is unbalanced. It is difficult to operate, and the transmission structure from the engine to the drive shafts of both pawls is complicated, and the size of the machine is large and the operability is poor.

Further, in the prior art disclosed in Japanese Patent Laid-Open No. 7-87801, the engine is attached to the front side of the gear case and the handle rod is extended from above the engine. The operability is poor, and it is difficult to lift the front-loading aircraft when retreating, resulting in poor operability.For this reason, stable tilling work cannot be performed, and both worm gears installed in front and behind the engine output shaft Since the worm wheel is meshed, the transmission structure is complicated and large, which is a problem.

[0005]

SUMMARY OF THE INVENTION The present invention has solved such a problem as a problem, and has a compact structure so that the machine body can be stably cultivated by a two-axle axle rotor and is lightweight and small in size. The front and rear pawl drive shafts are extended to the left and right and are parallel to each other at the front and rear positions of the gear case and have different rotation directions. In a small-sized management machine that is configured by axially mounting each of them and extending a handle rod behind the machine body, the engine is installed above the transmission cylinder body that is erected above the intermediate portion of the gear case in the front-rear direction. A worm gear is provided on the lower side of the transmission shaft that extends vertically through the inside of the transmission cylinder from the side toward the inside of the intermediate portion in the front-rear direction of the gear case, and the front and rear pawl drive shafts are respectively provided with worm gears. Each rear worm wheel and the front worm wheel made of the same diameter in the gear case which is fitted to the front and rear stepped surface of the worm gear is obtained by meshing.

Further, according to the present invention, the tilling width by the above-mentioned two-axle axle rotors can be further widened to enable stable and effective tilling. Therefore, the front claw drive shaft and the rear claws can be cultivated. Both front claw shafts and both rear claw shafts that are respectively connected to both ends of the drive shaft are formed so that one is short and the other is long, and the tilling claws are respectively arranged over the entire length range of the short claw shafts. It is configured such that tilling claws are arranged at the ends of the long claw shafts that are outward from the tips of the short claw shafts.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view of a small-sized management machine, in which an upper part of a gear case 1 which extends in the front-rear direction of the machine body is erected on the upper surface of an intermediate part in the front-rear direction so that the inside communicates with the inside of the gear case 1. A lower end side flange 5a of the transmission cylinder 5 is fixed via each bolt nut 11, and a fuel tank 12 is provided above the clutch case 5b formed at the upper end of the transmission cylinder 5. A transmission shaft 6 vertically connected to the lower portion of an engine E having a cylinder portion 13 directed toward the rear of the machine body and vertically extending inwardly of an intermediate portion of the gear case 1 in the front-rear direction inside the transmission cylinder body 5. At the upper end portion of the engine E, a clutch drum 14 that can form a clutch shoe and a centrifugal clutch on the output shaft side of the engine E is fixed,
Further, to the stay 16 fixed to the front portion of the transmission cylinder 5 via both bolts 15, a support frame 19 on which a rotary cover 18 having a rubber droop 17 is mounted is connected.

A worm gear 7 is axially mounted inside the middle portion of the gear case 1 in the front-rear direction, and the upper and lower portions of the shaft portion 7a of the worm gear 7 formed in a tubular shape are mounted on the transmission cylindrical body 5. The bearing 20 fitted to the lower portion and the bearing 21 fitted to the lower surface of the gear case 1 are fitted respectively, and the lower end portion of the transmission shaft 6 is spline-fitted 22 to the upper portion of the shaft portion 7a. A front pawl drive shaft 2 and a rear pawl drive shaft 3 which extend in the lateral direction and are parallel to each other are mounted at the front and rear positions of the gear case 1. The gear case 1 is mounted on the opening side of the bowl-shaped case body 1a. The lid 1b is fixed by bolts 25, and each bearing 2 is fitted to the inner surface of the case body 1a and the inner surface of the lid 1b.
Both the shafts 2 and 3 are inserted into the shaft 3, and the front worm wheel 8 and the rear worm wheel 9 having the same diameter are fitted to the intermediate portions of the shafts 2 and 3 in the gear case 1 through the keys 24, respectively. Then, the front worm wheel 8 and the rear worm wheel 9 are respectively meshed with the front and rear surfaces of the worm gear 7 so that the rotation directions thereof are different from each other.

The front end of a handle rod 4 having a twin handle 4a connected to the upper end thereof is fixed to the rear portion of the gear case 1, and the front end of the handle rod 4 is provided in a direction orthogonal to the handle rod 4. Both support bolts 2 having the tubes 26, 26 inserted at intervals and fixed by welding W and having their tips screwed to the upper and lower positions of the rear portion of the gear case 1, respectively.
7 and 27 are fitted and inserted in the inter-tubes 26 and 26, respectively, and the washers 2 are attached to the rear ends of the support bolts 27 and 27.
8 and the table nut 29 are attached and fixed.

At both ends of the rear pawl drive shaft 3, short rear rear pawl shafts 3a and 3b are provided with tilling pawls 10 over the entire length.
1 and the locking pins 31 to which the hairpins 30 can be inserted are respectively inserted and locked as shown in FIG. 4, and both ends of the front pawl drive shaft 2 are
The rear pawl shafts 3a, 3b become longer than the rear pawl shafts 3a, 3b,
3b is fitted with one end of both front claw shafts 2a and 2b, in which the tilling claws 10 are respectively arranged on the outer side of the tip of 3b, and the locking pin 31 into which the hairpin 30 can be inserted. As shown in FIG. 5, the front and rear pawl shafts 2a and 2b are engaged with each other and locked, and the tilling pawls 10 on both front pawl shafts 2a and 2b are attached to both rear pawl shafts 3a and 3b.
1 and FIG. 3 when viewed from the side with respect to the tilling claw 10 of FIG. 1 and mounted so that the rotation directions are different from each other as indicated by arrows a and b. It is also possible to mount one ends of the rear claw shafts 3b and 3a respectively, and also mount one ends of the front claw shafts 2b and 2a to the left and right ends of the rear claw drive shaft 3, respectively. The rotation directions of the front claw shafts 2a and 2b may be the same as the arrow B direction, and the rotation directions of the rear claw shafts 3a and 3b may be the same as the arrow A direction.

Both front pawl shafts attached to both ends of the front pawl drive shaft 2 and both rear pawl shafts attached to both ends of the rear pawl drive shaft 3 have the same length. In addition, it is also possible to dispose them so that they overlap each other when viewed from the side surface, or the rotation loci of the tilling claws are separated from each other when viewed from the side surface so that the tips do not interfere.

Therefore, since the two-axle rotor-type small-sized managing machine is constructed as described above, the whole structure can be made light and small, and the structure can be made easy, and the assembling can be facilitated and the packing and the transportation are convenient. Therefore, it can be manufactured at low cost.

When the engine E is started to perform tillage work in the field, a front worm wheel 8 and a rear worm wheel 9 having the same diameter that mesh with the front and rear surfaces of the worm gear 7.
Indicate that the directions of rotation are different from each other as indicated by arrows a and b, so that the group of tillage claws 10 on the front claw drive shaft 2 side is indicated by an arrow a, and the tillage on the rear claw drive shaft 3 side is tilled. Nail 1
The 0 group will rotate at the same number of revolutions as indicated by the arrow B, but if the operator who holds the twin handles 4a and lifts the twin handles 4a a little as shown by the arrow D, the rear nail The tiller claws 10 group on the drive shaft 3 side is lifted a little, and the load increases accordingly. The rotation of the tiller claws 10 group on the front claw drive shaft 2 side causes the machine body to advance in the arrow C direction. Further, when the twin handles 4a are pushed down a little as shown by the arrow E, the group of tillage claws 10 on the front claw drive shaft 2 side is slightly lifted, and the load increases accordingly, and the rear claw drive shaft 3 side increases. The body can be retracted in the direction of the reverse arrow C by rotating the group of 10 tillage claws.

In this small-sized management machine, the engine E is installed above the intermediate portion of the gear case 1 in the front-rear direction, and the tip of the handle rod 4 is fixed to the rear portion of the gear case 1. The operation can be performed easily and accurately, and stable cultivating work can be performed.

Both front claw shafts (2a) connected to both ends of the front claw drive shaft (2) and the rear claw drive shaft (3), respectively.
(2b) and both rear claw shafts (3a) and (3b) are shaped so that one is short and the other is long, and the tilling claws (10) are respectively arranged over the entire length range of the short both claw shafts. When the tilling claws (10) are respectively arranged at the ends of the longer both claw shafts which are outside the tips of the shorter both claw shafts, the tiller widths as shown in FIG. 2 can be obtained while operating the handle as described above. Widening W makes it possible to effectively cultivate.

[0016]

As described above, according to the present invention, the two-axle rotor rotor type small-sized managing machine can be made into a compact structure which is lightweight and small in size, easy to assemble, and convenient to pack and transport. Since it can be manufactured at low cost, the handle can be moved forward and backward easily and accurately by simply lifting or lowering the handle slightly during cultivating work, and it is stable. The cultivating work can be performed, which is preferable.

Both front pawl shafts (2a) connected to both ends of the front pawl drive shaft (2) and the rear pawl drive shaft (3), respectively.
(2b) and both rear claw shafts (3a) and (3b) are shaped so that one is short and the other is long, and the tilling claws (10) are respectively arranged over the entire length range of the short both claw shafts. If the tilling claws (10) are respectively arranged at the ends of the longer both claw shafts that are outward from the tips of the both shorter claw shafts, the tiller claws (10) can be appropriately operated and the tiller width can be widened to effectively plow. You can work.

[Brief description of the drawings]

FIG. 1 is a side view showing a small management machine.

FIG. 2 is a plan view schematically showing a lower portion of the small-sized management machine.

FIG. 3 is a side sectional view showing a part of FIG.

FIG. 4 is a plan sectional view showing a part of FIG.

[Explanation of symbols]

 1 gear case 2 front claw drive shaft 3 rear claw drive shaft 4 handle rod 5 transmission cylinder E engine 6 transmission shaft 7 worm gear 8 front worm wheel 9 rear worm wheel 10 tilling claw 2a, 2b front claw shaft 3a, 3b rear claw shaft

Claims (2)

[Claims] 1. The front and rear positions of the gear case (1) include two shafts, a front pawl drive shaft (2) and a rear pawl drive shaft (3), which extend to the left and right sides and are parallel to each other and have different rotation directions from each other. In a small-sized management machine that is configured by axially mounting and extending a handle rod (4) at the rear of the machine body, a transmission cylinder (5) that is erected above the intermediate portion in the front-rear direction of the gear case (1). The engine (E) is installed on the upper part, and the gear case (1) is passed through the inside of the transmission cylinder (5) from the engine (E) side.
Transmission shaft (6) hung vertically toward the inside of the middle part of the front-back direction
A worm gear (7) is provided on the lower side of the front worm wheel (8) having the same diameter in the gear case (1) fitted to the front pawl drive shaft (2) and the rear pawl drive shaft (3), respectively. And a rear worm wheel (9) meshed with the front and rear surfaces of the worm gear (7), respectively. 2. Both front pawl shafts (2a) (2) respectively connected to both ends of the front pawl drive shaft (2) and the rear pawl drive shaft (3).
b) and both rear claw shafts (3a) (3b) are formed such that one is short and the other is long, and the tilling claws (10) are respectively arranged over the entire length range of the short claw shafts.
The tilling claws (10) are arranged at the ends of the long claw shafts, which are outward from the tips of the short claw shafts.
The two-axle rotor-type compact management machine described.