JP2923241B2 - 2 axis axle rotor type small management machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, two front and rear pawl drive shafts, which extend in the left and right sides and are parallel to each other and have mutually different rotational directions at the front and rear positions of a gear case, are respectively supported by the shaft. As disclosed in Japanese Patent Publication No. 55-32321, a small management machine having a handlebar extending rearward is provided with one of the front and rear tillage nail groups respectively provided on the front nail drive shaft and the rear nail drive shaft. It is known to move forward or backward with the center of gravity of the crab, and as shown in Japanese Patent Application Laid-Open No. 7-87801, the body is advanced by a tillage claw disposed on the front claw drive shaft. It is also known to raise the upper part of the machine body, lift the tillage claw from the field, and retreat the tillage claw provided on the rear claw drive shaft by reversing the small tillage claw.

[0003]

However, in the prior art disclosed in Japanese Patent Publication No. 55-321321, since the engine is mounted above the front side of the gear case, the balance in the longitudinal direction of the body is poor, and The operation is also difficult, and the transmission structure from the engine to the two-claw drive shaft is complicated, resulting in a problem that the body is large and the operability is poor.

In the prior art disclosed in Japanese Patent Application Laid-Open No. 7-87801, an engine is mounted on the front side of a gear case and a handlebar extends from above the engine. As a result, it is difficult to lift the aircraft with the front load when retreating, and the operability is poor.Therefore, stable tillage work cannot be performed.Moreover, both worm gears provided before and after the engine output shaft have Since the worm wheel is meshed, the transmission structure is complicated and large in size.

[0005]

SUMMARY OF THE INVENTION The present invention solves such a problem as a problem, and has a compact structure so that the airframe can be stably cultivated by a two-axle rotor and is lightweight and small in size. Therefore, the front and rear pawl drive shafts, which are parallel to the front and rear positions of the gear case and extend in the left and right sides and have mutually different rotational directions, are provided at the front and rear positions of the gear case. In a small-sized management machine having a handlebar extending behind a body of the vehicle, an engine is mounted on an upper part of a transmission cylinder which is vertically suspended from an intermediate portion in the front-rear direction of the gear case. A worm gear is provided on the lower side of a transmission shaft vertically extending from the side through the inside of the transmission cylinder toward the middle part in the front-rear direction of the gear case, and the worm gear is provided on the front claw drive shaft and the rear claw drive shaft, respectively. 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, the present invention can further increase the tillage width of the two axle rotors, thereby enabling stable and effective tillage. Therefore, the front claw drive shaft and the rear claw are provided. Both front claw shafts and both rear claw shafts respectively connected to both ends of the drive shaft are formed so that one is short and the other is long, and the cultivating claws are respectively disposed over the entire length range of the short both claw shafts, and The cultivating claws are respectively arranged at the ends of the long double pawl shafts, which are located outside the ends of the short double pawl shafts.

[0007]

FIG. 1 is a side view of a small-sized management machine, and the upper part of a gear case 1 which extends in the front-rear direction of the body is vertically erected to communicate with the inside of the gear case 1. A lower end flange 5a of the transmission cylinder 5 is fixedly mounted via bolts and nuts 11, and a fuel tank 12 is provided above the clutch case 5b formed at the upper end of the transmission cylinder 5 at the top. A transmission shaft 6 that connects and fixes a lower portion of an engine E having a cylinder portion 13 facing rearward of the vehicle body, and that is vertically suspended inside the transmission cylinder 5 toward an inward portion in the front-rear direction of the gear case 1. A clutch drum 14 that can constitute a clutch shoe and a centrifugal clutch on the output shaft side of the engine E is fixed to the upper end of the engine E.
Further, a support frame 19 on which a rotary cover 18 having a rubber hang 17 is mounted is connected to a stay 16 fixed to the front portion of the transmission cylinder 5 via both bolts 15.

The gear case 1 is supported inside the middle part of the gear case 1 in the front-rear direction with the worm gear 7 as the vertical axis. The upper and lower shaft portions 7a of the worm gear 7 formed in a cylindrical shape are The lower end of the transmission shaft 6 is spline-fitted 22 on the upper part of the shaft part 7a by fitting the bearing 20 fitted on the lower part and the bearing 21 fitted on the lower surface of the gear case 1 respectively. A front claw drive shaft 2 and a rear claw drive shaft 3 which extend in the left-right lateral direction and are parallel to each other are mounted on the front and rear positions of the gear case 1, and the gear case 1 is located on the opening side of the bowl-shaped case body 1a. The cover 1b is fixed by bolts 25, and each bearing 2 fitted on the inner surface of the case body 1a and the inner surface of the cover 1b.
The front worm wheel 8 and the rear worm wheel 9 having the same diameter are fitted via a key 24 to the middle portion of the two shafts 2 and 3 in the gear case 1 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.

A distal end of a handle rod 4 having a double handle 4a connected to an upper end thereof is fixed to a rear portion of the gear case 1. The distal end of the handle rod 4 has two ends in a direction perpendicular to the handle rod 4. The two support bolts 2 are inserted and fixed at intervals with the intermediate cylinders 26 and 26 fixed by welding W, and the front ends of the two support bolts 2 are screwed into upper and lower positions of the rear part of the gear case 1.
7 and 27 are respectively inserted into the intermediate cylinders 26 and 26, and a washer 2 is attached to the rear ends of the support bolts 27 and 27.
8 and the double nut 29 are attached and fixed.

Short rear pawl shafts 3a, 3b having tillage pawls 10 disposed at both ends of the rear pawl drive shaft 3 over the entire length range.
4 and a locking pin 31 into which the hairpin 30 can be inserted is inserted and locked into each as shown in FIG. 4, and both ends of the front claw driving shaft 2 are
Become longer than the rear claw shafts 3a, 3b,
A locking pin 31 into which the ends of the front claw shafts 2a and 2b each having the tillage claw 10 respectively disposed at the outer end from the tip of 3b are fitted, and the hairpin 30 can be inserted. As shown in the figure, the cultivating claw 10 of both front claw shafts 2a, 2b is inserted and locked to each, and the rear claw shafts 3a, 3b
1 and FIG. 3 when viewed from the side, and mounted so that the directions of rotation are different from each other as shown by arrows a and b. One end of the rear claw shafts 3b and 3a may be attached to the rear claw shaft 3b, and one end of the front claw shafts 2b and 2a may be attached to the left and right ends of the rear claw drive shaft 3, respectively. The rotation direction of both front claw shafts 2a and 2b may be the same as the direction of arrow B, and the rotation direction of both rear claw shafts 3a and 3b may be the same as the direction of arrow A.

The length of both front claw shafts attached to both ends of the front claw drive shaft 2 and the length of both rear claw shafts attached to both ends of the rear claw drive shaft 3 are the same, so that both front claw shafts and both rear claw shafts are provided. In such a case, the rotation trajectories of the tillage claws may be arranged so as to be separated from each other so as not to overlap or to interfere with each other when viewed from the side.

[0012] Therefore, the two-axle axle rotor type small management machine is configured as described above, so that the whole can be made lightweight and compact, and the assembly becomes easy, and the packing and transportation are convenient. And can be manufactured at low cost.

When the engine E is started to perform the plowing operation in the field, the front worm wheel 8 and the rear worm wheel 9 having the same diameter meshing with the front and rear surfaces of the worm gear 7.
As shown by arrows a and b, the rotation directions are different from each other, so that the group of tillage claws 10 on the front claw drive shaft 2 side and the tillage on the rear claw drive shaft 3 side as shown by arrow a. Nail 1
The group 0 rotates at the same rotational speed as shown by the arrow B. However, when the operator who grips and steers the twin handle 4a lifts the twin handle 4a slightly as shown by the arrow D, the rear claw is moved. The cultivating pawls 10 on the side of the drive shaft 3 are slightly lifted, and accordingly the load is increased, and the rotation of the cultivating pawls 10 on the side of the front pawl drive shaft 2 causes the body to advance in the direction of arrow C. Further, when the twin handle 4a is slightly pushed down as shown by the arrow E, the group of the tillage nails 10 on the front nail drive shaft 2 side is slightly lifted, and the load is increased by that amount, so that the rear nail drive shaft 3 side becomes larger. The rotation of the group of tillage claws 10 allows the aircraft to retreat in the direction of the reverse arrow C.

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

Further, 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 formed such that one is short and the other is long, and a tillage claw (10) is disposed over the entire length range of the short both claw shafts. When the cultivating claws (10) are respectively arranged at the ends of the long double-claw shafts located outside the ends of the short double-claw shafts, the cultivation width as shown in FIG. Tilling work can be performed effectively by widening W.

[0016]

As described above, according to the present invention, the two-axle axle rotor type compact management machine can be made to have a compact structure that is lightweight and small in size, easy to assemble, and convenient for packing and transportation. It can be manufactured at low cost, and during tilling work, the handle operation for moving the aircraft forward and backward can be performed easily and accurately by raising and lowering the handle slightly, and stable Tilling work can be performed, and it can be suitably performed.

Further, 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 formed such that one is short and the other is long, and a tillage claw (10) is disposed over the entire length range of the short both claw shafts. By arranging the tillage claws (10) at the ends of the long two-claw shafts located outside the ends of the short two-claw shafts, respectively, the tillage width is widened and effective tillage is performed while properly steering the handle. Can work.

[Brief description of the drawings]

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

FIG. 2 is a plan view schematically showing a lower part of the small management device.

FIG. 3 is a side sectional view showing a part of FIG. 1;

FIG. 4 is a plan sectional view showing a part of FIG. 1;

[Explanation of symbols]

 REFERENCE SIGNS LIST 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 tillage claw 2a, 2b front claw shaft 3a, 3b rear claw shaft

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A01B 33/00-33/08

Claims (2)

(57) [Claims] A front and rear pawl drive shaft (2) and a rear pawl drive shaft (3), which extend in the left and right sides and become parallel to each other and have mutually different rotational directions, are provided at front and rear positions of the gear case (1). In a small-sized management machine which is constructed by extending a handlebar (4) at the rear of the machine body, each of which has a transmission cylinder (5) suspended vertically above an intermediate portion in the front-rear direction of the gear case (1). An engine (E) is mounted 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) vertically installed inward of the middle part in the front-rear direction
A worm gear (7) is provided on the lower side of the front case, and a 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 front and rear surfaces of the worm gear (7), respectively. 2. Both front pawl shafts (2a) (2) connected to both ends of the front pawl drive shaft (2) and the rear pawl drive shaft (3), respectively.
b) and both rear claw shafts (3a) and (3b) are formed such that one is short and the other is long, and a tillage claw (10) is disposed over the entire length range of the short both claw shafts, respectively.
2. A tilling claw (10) is disposed at an end of a long double claw shaft which is located outside of a tip of the short double claw shaft.
A two-axle axle rotor type compact management machine as described in the above.