JP4861199B2 - Walking type management machine - Google Patents

Description

  The present invention relates to a walking-type management machine suitable for use in farm work in a field, home garden, or the like.

As a walking type management machine, for example, as shown in Patent Document 1, a rotary tiller is detachably attached to the upper part of a longitudinal transmission type transmission case and propelled by a wheel pivotally supported at the lower end of the transmission case The specifications for plowing with a rotary tiller (see FIG. 7 of Patent Document 1) and the axle work specifications for removing the rotary tiller and mounting the tilling rotor on the axle at the lower end of the transmission case (see FIG. 1 of Patent Document 1) ) Is known so that it can be selected.
For example, as shown in Patent Document 2, a rotary tillage device is detachably linked to a lower end portion of a longitudinal transmission type transmission case, and is rotated while being propelled by a wheel pivotally supported on the lower end portion of the transmission case. A configuration is known in which a specification for cultivating with a cultivator and an axle work specification for removing a rotary cultivator and mounting a cultivating rotor on the axle at the lower end of a mission case can be selected.
JP 2000-320571 A (paragraph [0038], FIG. 7) Japanese Utility Model Publication No. 63-31703

  The conventional structure shown in Patent Document 1 has an advantage that a rotary tilling operation and an axle operation by wheel propulsion can be selected, but a transmission case having a different specification that constitutes a transmission case and a rotary tilling device; It was necessary to prepare this, and the cost was high.

  In the conventional structure shown in Patent Document 2, a rotary tilling operation and an axle operation by wheel propulsion can be selected, and a bevel gear case portion that horizontally supports the axle and a bevel gear case portion that horizontally supports the rotary shaft. Although it has the advantage that some parts can be shared by configuring the same specifications, the rotary shaft is driven at high speed because of the structure that transmits the power of the axle that has been greatly decelerated to the rotary shaft. It was difficult to do and the work range was limited.

  The present invention has been made paying attention to such points, and provides a walking-type management machine capable of reducing costs by increasing the sharing of parts and capable of performing a wide range of work. The purpose is that.

  The first invention extends a steering handle from a transmission case having a prime mover mounted and connected to the upper end, and has provided case connecting portions at a plurality of locations on the peripheral surface excluding the left and right side surfaces of the mission case. A transmission case formed to the same specification is configured to be connectable, and a work rotation shaft that is driven at high speed by power from the prime mover is horizontally supported at the tip of one transmission case, and the other transmission case A traveling rotary shaft that is driven at a low speed by power from the prime mover is horizontally supported at the tip of the motor.

According to the above configuration, the transmission case that horizontally supports the rotating shaft for traveling and the transmission case that horizontally supports the rotating shaft for work are connected to the different case connecting portions of the transmission case, respectively, so that the rotation for traveling is performed. By attaching a wheel to the shaft and attaching, for example, a tillage rotor to the work rotation shaft, a management machine having a work specification for performing rotary tillage by propelling and moving with the wheel can be obtained. By connecting only the transmission case that horizontally supports the work rotation shaft to the case case connection part of the transmission case and attaching the tillage rotor, for example, to the work rotation shaft, the axle that is cultivated while being propelled and moved by the tillage rotor A work specification management machine can be obtained.
The working transmission case and the traveling transmission case used here have the same specifications, so the mold cost of the transmission case, which occupies most of the manufacturing cost, can be halved, which is effective in reducing the cost of the entire walking type management machine. .

According to a second invention, in the first invention,
A transmission shaft along a case extending direction is supported on the transmission case, and the transmission shaft and the rotating shaft horizontally supported at the tip of the case are connected to each other via a worm reduction mechanism. .

  According to the above configuration, the rotation of the transmission shaft can be greatly decelerated and transmitted to the horizontally mounted rotation shaft with a compact structure with a small number of parts, which is effective for reducing the size and weight of the transmission case.

According to a third invention, in the second invention,
A diff-lockable differential mechanism is provided inside the worm wheel in the worm reduction mechanism, and the left and right differential shafts butt-equipped on the differential mechanism are configured as the rotating shaft.

  According to the above configuration, by using the left and right rotating shafts as axles, the left and right wheels are differentially rotated to smoothly turn and the left and right wheels are integrated with the left and right wheels. The wheel can be driven at a constant speed to select a travel mode (diff lock state) excellent in straightness, and travel suitable for the work conditions and the situation of the work place can be performed.

According to a fourth invention, in the second or third invention,
A planetary speed reduction mechanism that drives the transmission shaft at a reduced speed can be incorporated at the base of the transmission case.

  According to the above configuration, by incorporating the planetary speed reduction mechanism in the transmission case used for traveling, it is possible to greatly reduce and drive the rotating shaft that is horizontally mounted on the transmission case as an axle. In this case, since the base of the transmission case has a large diameter, it is effective in securing the connection strength of the transmission case to the transmission case.

  FIG. 1 shows a side view of a walking type management machine configured to have wheel propulsion specifications. The walking type management machine includes a transmission case 1, an electric motor 2 as a prime mover connected to the upper end of the transmission case 1, a transmission transmission case 3 connected to the transmission case 1, a transmission case 4 for work, and a transmission case 1. And a steering handle 5 that is connected and supported over the work transmission case 4 and extends upward in the rear of the machine body.

  As shown in FIGS. 2 and 3, the electric motor 2 is mounted in a vertical posture, and a downwardly-directed output shaft 6 is inserted into the mission case 1, and a first intermediate transmission shaft 7 disposed vertically in the mission case. Are concentrically connected to each other. The electric motor 2 is a DC motor, and a power supply battery 8 is mounted on a support base 9 arranged on the side of the mission case 1.

  The transmission case 1 is formed in a box shape, and case connecting portions 11 and 12 are formed in openings on the front and lower surfaces of the peripheral surface, respectively, and the transmission case 3 for traveling and the working case are connected to the case connecting portions 11 and 12, respectively. The transmission cases 4 are bolted so as to be detachable.

  The work transmission case 4 connected to the downward-facing case connecting portion 12 in the transmission case 1 is provided with a transmission shaft 13 along its extending direction, and the first intermediate between the transmission shaft 13 and the transmission case 1 The transmission shaft 7 is concentrically linked via a work clutch 14. The work clutch 14 is configured such that a clutch boss 15 slidably mounted on the first intermediate transmission shaft 7 is pawl-engaged with a passive boss 16 which is splined and fixed to the upper end portion of the transmission shaft 13. The power transmission from the first intermediate transmission shaft 7 to the transmission shaft 13 is interrupted by sliding the clutch boss 15 by swinging the shaft 17 around the support shaft 18 from the outside.

  A circular bulging portion 4a is formed in the lower portion of the working transmission case 4, and a worm reduction mechanism 20 as an example of a reduction mechanism is incorporated therein. The worm reduction mechanism 20 includes a worm gear 21 connected to the lower portion of the transmission shaft 13 and a worm wheel 22 engaged with the worm gear 21, and a rotating shaft 23 connected to the center of the worm wheel 22 serves as a work shaft. The tilling rotor 24 is externally connected to the rotary shaft 23 that is supported by the frame and protrudes to the left and right of the transmission case 4. As shown in FIG. 5, the tilling rotor 24 is configured by planting a tilling claw 26 on a cylindrical claw shaft 25 with a predetermined pattern.

  As shown in FIG. 3, the transmission case 1 is equipped with a second intermediate transmission shaft 27 facing the center of the case connecting portion 11 facing forward, and the second intermediate transmission shaft 27 is connected to the first intermediate shaft. 7 is linked to the speed reduction via bevel gears 28 and 29.

  The transmission transmission case 3 connected to the transmission case 1 is provided with a transmission shaft 30 along its extending direction, and the transmission shaft 30 and the second intermediate transmission shaft 27 are located at the base of the transmission case 3. Concentrically linked and connected via a deployed planetary speed reduction mechanism 31.

  The planetary reduction mechanism 31 includes a sun gear 32 connected to the front end of the second intermediate transmission shaft 27, a carrier 33 connected to the rear end of the transmission shaft 30, a ring gear 34 fitted and fixed to the base of the transmission case 3, and A plurality of planetary gears 35 are supported by the carrier 33 and engaged with the sun gear 32 and the ring gear 34. The rotational power of the second intermediate transmission shaft 27 is greatly decelerated and transmitted to the transmission shaft 30. It has become so.

  The traveling transmission case 3 has the same specifications and is molded with the same mold as the working transmission case 4. The circular bulging portion 3 a formed at the tip of the traveling transmission case 3 has a working A worm reduction mechanism 36 having the same occlusion specification as that of the worm reduction mechanism 20 provided in the transmission case 4 is incorporated. The worm reduction mechanism 36 includes a worm gear 37 connected to the front end portion of the transmission shaft 30 and a worm wheel 38 engaged with the worm gear 37, and a diff mechanism 39 with a diff lock is provided inside the worm wheel 38. ing.

  As shown in FIG. 4, the differential mechanism 39 includes a differential gear case 40 integrated with a worm wheel 38, a pair of bevel pinion gears 41 rotatably supported at diagonal positions of the differential gear case 40, and both bevel pinion gears. And a pair of left and right differential bevel gears 42 that mesh with 41. A pair of left and right rotary shafts 43 serving as differential shafts that are spline connected to the differential bevel gears 42 and mounted horizontally are supported by the circular bulging portion 3a and protruded from the transmission case 3 while being arranged to face each other. Wheels 44 are mounted on the left and right rotating shafts 43, respectively.

  The bevel pinion gear 41 can be fixed to the differential gear case 40 by inserting a lock pin 45 into the support shaft portion 41a. By preventing the bevel pinion gear 41 from rotating, the relative rotation of the left and right rotating shafts 43 is prevented. The differential lock state to be obtained is obtained. As shown in FIG. 4, in the differential lock release state in which the lock pin 45 is extracted from the support shaft portion 41a, the left and right wheels 44 can be differentially rotated to enable smooth vehicle body turning, and the lock pin 45 is connected to the support shaft portion 41a. In the differential lock state inserted into the left and right wheels 44, the left and right wheels 44 rotate integrally to enable propulsion with high straightness, and the differential lock can be switched on and off as needed. A plurality of lock pins 45 are provided in the circumferential direction and mounted on the support ring 49, and the diff lock unlocked state and the diff lock state are achieved by sliding the support ring 49 in the axial direction by screw operation or the like from outside the case. Can be selected.

  In the state where the transmission case 3 and the working transmission case 4 are connected to the transmission case 1 as described above, the transmission case 4 is propelled and moved by the wheels 44 attached to the traveling transmission case 3. The form which plows with the provided cultivation rotor 24 is obtained.

  The start and stop of the vehicle body, switching between forward and backward travel, and setting of the traveling speed can be performed by a switch, an operation dial, and an operation lever (not shown) provided at the hand of the steering handle 5. Driving and stopping the rotary tiller A can be selected by turning on and off the work clutch 14. The operation lever of the work clutch 14 may be provided near the mission case 1 or the steering handle 5.

  If the steering handle 5 is connected to the traveling transmission case 3, the rotary tilling work can be performed with the specifications in which the tilling rotor 24 is positioned in front of the body of the wheel 44.

FIG. 6 shows a form in which rotary tillage work is performed with axle work specifications. In this axle work specification, the traveling transmission case 3 is removed, the case connecting portion 11 is closed by the cover 46, and propulsion and tilling are performed by rotation by the tilling rotor 24 provided in the working transmission case 4. In this work specification, the forward speed is adjusted by adjusting the propulsion resistance by adjusting the propulsion resistance by piercing the resistance bar 47 provided in the steering handle 5 into the field and adjusting the amount of rush of the resistance bar 46.
A handle 48 is provided at the upper end of the resistance rod 46 so that the vehicle body can be easily lifted.

[Other Examples]
(1) As the motor | power_engine 2 mounted and connected to the mission case 1, besides using an electric motor as mentioned above, a small vertical axis | shaft type engine can also be utilized.
(2) Contrary to the above embodiment, the working transmission case 4 is connected to the front case connecting portion 11, the traveling transmission case 3 is connected to the lower case connecting portion 12, and the tilling rotor 24 is It can also be carried out in the form of traveling in front of the wheels 44.
(3) When an engine is used for the prime mover 2, a main clutch may be interposed between the output shaft of the engine and the first intermediate transmission shaft 7. The main clutch in this case is a centrifugal clutch that automatically enters the clutch disengaged state when the engine speed drops to a set speed (for example, idling speed), and automatically enters the clutch state when the engine speed exceeds the set speed. When the is used, the main clutch can be turned on and off by the accelerator operation of the prime mover 2 without requiring a dedicated clutch operation lever or the like.

Overall side view of walking type management machine configured to wheel propulsion specifications Longitudinal side view showing transmission structure Vertical side view showing part of the transmission structure Longitudinal front view showing part of the transmission structure Front view of tillage rotor Overall side view of walking-type management machine configured to axle work specifications

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transmission case 2 Motor | power_engine 3 Transmission case 4 Transmission case 5 Control handle 11 Case connection part 12 Case connection part 13 Transmission shaft 20 Worm reduction mechanism 23 Rotation shaft 30 Transmission shaft 31 Planetary reduction mechanism 36 Worm reduction mechanism 38 Worm wheel 39 Differential mechanism 43 Axis of rotation

Claims (4)

  Extending the steering handle from the transmission case with the prime mover mounted on the upper end, and provided case connection parts at multiple locations on the peripheral surface excluding the left and right sides of the mission case, each case connection part was formed to the same specifications A transmission case is configured to be connectable, and a work rotation shaft that is driven at high speed by the power from the prime mover is horizontally supported at the tip of one transmission case, and the tip of the other transmission case is A walking-type management machine characterized in that a traveling rotary shaft driven at low speed by power from a prime mover is horizontally mounted.   2. A transmission shaft along a case extending direction is supported on the transmission case, and the transmission shaft and the rotating shaft horizontally supported at the tip of the case are coupled to each other via a worm reduction mechanism. The described walking type management machine.   The walking type management machine according to claim 2, wherein a diff-lockable differential mechanism is provided inside a worm wheel in the worm deceleration mechanism, and the left and right differential shafts butt-equipped to the differential mechanism are configured as the rotary shaft. .   The walking type management machine according to claim 2 or 3, wherein a planetary speed reduction mechanism that drives the transmission shaft at a reduced speed can be incorporated in a base portion of the transmission case.

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