JPS61181302A - Apparatus for driving rotary shaft in walking type cultivator - 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 (a) Industrial field of application The present invention is directed to a forward/reverse switching device using a bevel gear transmission provided in the main unit of a walk-behind agricultural vehicle. The shaft is constructed so that it can be driven in both forward and reverse directions, and the tiller can be attached and detached from the machine by the extremely simple means of inserting and removing two pitch bins, thereby making it possible to transform the tiller into an agricultural vehicle. be configured so that it can be used for multiple purposes,
This paper attempts to propose an improved drive system for walk-behind agricultural vehicles.

(b) Conventional technology Japanese Patent Application Laid-Open No. 156750/1982 (Patent Application No. 576/1983)
No. 88) proposes a forward/reverse drive device for a rotary shaft in a walk-behind agricultural vehicle. An overview of the conventional technology disclosed in the publication is as follows.

This is a forward/reverse drive device that can switch the rotary shaft of the tilling section of a walk-behind agricultural vehicle to rotate in either forward or reverse direction, and is a forward/reverse drive device that can rotate the rotary shaft of the tilling section of a walk-behind agricultural vehicle by switching between forward and reverse directions.・The rotary shaft is driven from the reverse switching device using a shaft drive system using a bevel gear transmission, and the tilling section is directly fastened to the speed change case.

(C) Problems to be Solved by the Invention However, the conventional technology disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 156750/1983 involves mounting various working machines on the rotary shaft of the tilling section to carry out the work. This is a so-called rotary work-only machine, and it is not possible to remove the tilling section, which is directly fastened to the transmission case, and attach other work machines to it for work. That is, it does not have a pitch for mounting pears, trailers, etc.

In order to utilize agricultural vehicles for multiple purposes, it is essential to equip them with a pitch.

Therefore, we installed a pitch on the machine side, and used a shaft drive method to extract power from the forward/reverse switching device using bevel gear transmission installed in the transmission case through a hole provided in the front of the pitch. It is necessary to develop a rotary shaft drive device that is configured to drive the rotary shaft of the tilling section, and that also allows the tilling section to be attached to and removed from the machine by the extremely simple method of inserting and removing two pitch bins. This allows agricultural vehicles to be used for multiple purposes.

2) Means for solving the problem In the present invention, as a means for solving the above-mentioned problem, the prime mover (2) mounted on the machine (1) is used.
) is equipped with a transmission case (6) for transmitting the power of the left and right running wheels ■, φ and the rotary shaft (5) of the tilling section (4). The rear cover (7) is fixed to the rear cover (7).
A bevel gear (8) is supported so that its rotational axis coincides with the left-right center line X-X of the machine (1), and the bevel gear (8)
A pair of bevel gears (9) and (10) meshing with the clutch pawls ■ and (
8) Slide the switching shaft 0 on which the bevel gear ■, [phase] is loosely fitted, and the switching pawl @ wedge-fitted on the switching shaft [phase] from side to side so that the Clutch pawl■, (8
) A forward/reverse switching device for the bevel gear (6), consisting of main parts such as a shift fork (■) that is selectively engaged with the gear, is provided in the transmission case (8), and The spline hole [phase] is opened toward the rear,
The front end of the upper shaft 0 is wedged into the spline hole ■, and the drive shaft @ is suspended from the rear part of the upper shaft ■ via a bevel gear transmission. Upper axis ■
The upper shaft O and the drive shaft [phase] are supported by the bevel gear case [phase] so that the axis of the axis matches the left-right center line X-X of the machine (1). The small bevel gear [phase] is wedge-fitted, and the large bevel gear ■ meshing with the small bevel gear [phase] is fixed to the rotary shaft (5), and the rotary shaft ■ is perpendicular to the drive shaft @. The rotary shaft ■ is supported at the bottom of the bevel gear case 0 so that it is driven in the same position, and the direction of rotation of the rotary shaft ■ can be changed between forward and reverse rotation by operating the shift fork [phase] of the forward/reverse switching device. In addition to being able to switch and rotate in either direction, a hitch @ with a U-shaped cross section is fixed to the rear surface of the rear cover ■, and the U-shaped portion of the hitch @ has a cap that can be written on. The front end of the gear case 0 is fitted, and the ^1 end of the upper shaft 0 protrudes forward beyond the hole @ drilled in the front face of the hitch @ and wedges into the spline hole [phase] of the bevel gear (6).
Left and right bottle holes A [phase], @'
The tiller ■ is attached to the machine (1) by inserting the left and right bottle holes B @, @′ drilled in the front end of the bevel gear case 0 and the two hitch pins @, ■′. A driving device for the rotary shaft (2) is constructed by driving the rotary shaft (2).

(For ordinary tillage work, the sliding gear ■, [phase]
Operate the transmission mechanism (not shown) to select and engage the fixed gears ■, ■, and move the running wheels ■, ■' to the desired speed by moving the arrows (
Set it to rotate in the direction a). On the other hand, operate the transmission mechanism (not shown) to select and mesh the sliding gear [phase], (6) with the fixed gear @, 0, set the rotary shaft ■ to the desired rotational speed, and shift and fork. (6) with arrow (c)
Move the switching pawl ■ in the direction of , engage the clutch pawl @ carved on the bevel gear [phase], and then move the bevel gear ■ and the upper shaft @
, drive shaft [phase], small bevel gear [phase], large bevel gear■
, Set the tilling claw ■ attached to the rotary shaft (5) to rotate in the direction of the arrow (E) via the rotary shaft ■.Then, operate the main clutch lever ■ to turn on the power (not shown). The tilling work is performed by the power of the prime mover (2) via the disconnection mechanism.In this state, the running wheels
The rotary shaft (2) rotates in the same direction as the rotational direction (A) of the rotary shafts (A), which is the so-called normal rotation direction.

Next, move the shift fork O in the direction of the arrow) and move the switching pawl ■ to the clutch pawl (8) carved on the bevel gear ■.
), the bevel gear ■, upper shaft @, and drive shaft [
phase], small bevel gear [phase], large bevel gear■, rotary shaft■
The tilling claw O is attached to the rotary shaft (5) through the
rotates in the direction of the arrow (to), and rotates in the direction of the arrow (b) opposite to the rotation direction (a) of the running wheels (2) and d, that is, in the reverse direction.

In this state, if the rotary shaft ■ is equipped with working equipment such as blade rotors or earth-clamping claws on the left and right sides and excavated by digging a trench, most of the debris will be ejected to the left and right while being ejected forward in the direction of rotation. As a result, gravel does not fly into the drilled grooves, making it possible to raise grooves with extremely accurate groove shapes.

In addition, the transmission case (8) shown in this embodiment also includes running wheels.
Although the reversing mechanism that rotates the wheels in the direction of the arrow (B) is not shown, it is normal for the vehicle to have a forward and reverse device, so the running wheels (■, ), set the rotary shaft ■ so that it rotates in the direction of the arrows (sideways), turn the handle [stock] 180 turns, and perform the trench digging work.
Since the machine moves in a straight line, the machine is extremely stable and can be operated with good operability.

In addition, when removing the tiller part ■ from this machine ■ for plowing work or trailer work, loosen the bolt @ and pull out the two hitch pins [phase], When the bevel gear case [phase] fitted in the section is pulled out from the hitch@, the wedged state between the front end of the upper shaft O and the wedged bevel gear ■ will be released, and the tilling section ■ will be removed from the machine ■. It will be removed. Then, pears and trailers are attached to Hituchi@ and each task is carried out.

(f) Embodiments The present invention will be specifically explained based on drawings illustrating examples. ■ is a walk-behind agricultural vehicle equipped with a prime mover ■, left and right running wheels ■, J, transmission case ■, hitch @, handle ■, etc. ■ is an upper shaft O, drive shaft ■, bevel gear This is the tilling section of a walk-behind agricultural vehicle, which is equipped with a case [phase], a rotary shaft (■), a tilling claw O1 tail wheel (■), etc. Prime mover (2
) is powered by the engine pulley [phase], input pulley ■,
■The power is transmitted to the input shaft via the belt [phase] or the like by operating the main clutch lever (6) that controls the power connection/disconnection mechanism (not shown). A fixed gear @, ■ is fixed to the input shaft @, and a sliding gear ■, [phase] which selectively slides and meshes with the fixed gear @, ■ is slidably wedge-fitted into the intermediate shaft @. . The wheel shaft (8) is driven via a transmission gear (■) fixed to the intermediate shaft @ and a transmission device (not shown) that meshes with the transmission gear (8), and the wheel shaft (8) is driven by the transmission gear (8).
The left and right running wheels (2) and (2) attached to the vehicle are driven at variable speeds in the direction of the arrow (A) to move the walking agricultural vehicle forward. Further, arrows (b) indicate the rotation direction of the running wheels (2) and the fog when the walking agricultural vehicle moves backward via a transmission (not shown).

In addition, a sliding gear [phase] 0 for transmitting power to the rotary shaft ■ of the tilling section (4) is slidably wedged into the input shaft @, and is fixed to the switching shaft O. It is configured to selectively slide and mesh with the fixed gear @, 0. A bevel gear ■ and [phase] are loosely fitted to the switching shaft [phase]. There is. Further, a switching pawl 0 is wedge-fitted into the switching shaft @ so as to be slidable left and right. The switching pawl @ is operated by moving the shift fork [phase] to the left and right, and the bevel gear ■
, the clutch pawls marked on [phase] are selectively engaged with the clutch pawls ■ and @, and power in different rotational directions is transmitted to the bevel gear ■ and the bevel gear ■ that is always in mesh with the [phase]. be.

In the present invention, the forward/reverse switching device is referred to as the bevel gear (9) having the above-mentioned switching shaft (■), clutch pawl (■), and @.
,(10), Refers to a switching device that is composed of main parts such as a switching pawl 0, a shift fork [phase], and a bevel gear ■, and that switches the bevel gear ■ to rotate in different rotational directions. The switching device is provided in the transmission case (2).

The rear cover ■ is fixed to the rear surface of the transmission case ■ with a set screw @, and the rear cover (7) has a bevel gear (8) whose rotation axis is aligned with the left-right center line X-X of the machine (1). The bevel gears are supported so as to coincide with each other, and a spline hole [phase] opens rearward at the rotation axis of the bevel gear≠(6). Bevel gear (6
) The front end of the upper shaft 0 is wedged into the spline hole [phase],
The upper shaft @ extends toward the rear. A bevel gear [phase] is fixed to the rear end of the upper shaft 0, and the bevel gear 0 meshes with a bevel gear [phase] fixed to the upper end of the drive shaft [phase] to drive the drive shaft [phase]. do. The drive shaft (2) hangs downward at the rear of the upper shaft (2) via a bevel gear transmission device consisting of the bevel gears (2), [phase], etc. shown above. The axes of the upper shaft O and the drive shaft [phase] are both supported by the bevel gear case [phase] so as to coincide with the left-right center line X-X of the machine (1). A small bevel gear [phase] is wedge-fitted into the lower part of the drive shaft [phase], and a large bevel gear (6) meshing with the small bevel gear [phase] is fixed to the rotary shaft (5). The rotary shaft (■) is supported at the bottom of the bevel gear case (■) so that the rotary shaft (■) is driven at right angles to the phase.

With the drive device configured in this way, the rotary shaft (1) has two rotational speeds that rotate forward and reverse, respectively, so four types of rotation can be obtained. Various types of working equipment (not shown) are installed to carry out tasks such as tilling, intertilling, cultivating soil, digging trenches, and filling soil.

O is the tail wheel frame, and the front end is the bevel gear case [phase]
The tail wheel ◎ is attached to the rear end via a mounting bracket. ■ is a rotary cover that is fixed to the bevel gear case ■, tail wheel frame @, etc.

@ is a hitch with a U-shaped cross section, and is fixed to the rear surface of the rear cover ■ with bolt 0. The hitch @ has two pin holes A @ and @' drilled on the left and right sides, and a hole @ from which the front end of the upper shaft 0 can protrude is bored in the front surface.

The front part of the bevel gear case [phase] fits into the U-shaped part of the hitch@, and the left and right pin holes B [with] and [phase]' are located at the positions corresponding to the pin holes A@ and [phase]' of the hitch@. is perforated.

Turtle [phase]' is a hituchi pin, and the pin hole A@ of hituchi@
, [phase]' and pin hole B@l of bevel gear case [phase], [
The tilling section (2) is inserted into the machine (1) and the tilling section (2) is inserted into the machine (1). ■ is a bolt that is screwed into the front of the bevel gear case [phase], and extends between it and the rear surface of the hitch @ to securely attach the tiller part ■.

In this embodiment, the spline hole (
The front end of the upper shaft (6) is wedged directly into 5),
Shorten the front end of the upper shaft O to connect the spline hole ■ and the upper shaft 0.
It should be understood as a common practice that the rotation of the bevel gear (6) may be transmitted to the upper shaft @ by interposing a joint such as a universal joint or a coupling between the front end of the bevel gear (6) and the front end of the bevel gear (6).

(G) Effects of the Invention As detailed above, the drive device for the rotary shaft in the walk-behind agricultural vehicle according to the present invention converts the power from the forward/reverse switching device provided in the transmission case on the machine side into a pitch-shifting device. Because it is configured to be taken out through a hole in the front, the tiller, which is driven by a shaft drive system using bevel gear transmission, requires two pins and a reverse rotation to attach and detach it to and from the machine. It is possible to choose from a wide variety of tasks, from plowing and management work to rice cake making and trailer work by removing the tilling section.
It can be said to be an excellent rotary shaft drive device because it can be used for a variety of purposes on agricultural vehicles.

[Brief explanation of drawings]

The attached drawings are drawings illustrating embodiments of the present invention, in which FIG. 1 is a side view of a walk-behind agricultural vehicle, FIG. 2 is a plan sectional view of the main parts in FIG. 1, and FIG. 2, FIG. 4 is a sectional view of the main part along line Y--Y in FIG. 2, and FIG. 5 is a top view of the hitch in FIG. 5. In these drawings, ■ is the main machine, ■ is the tilling section, ■ is the rotary shaft, ■ is the transmission case, ■ is the bevel gear, ■ is the upper shaft,
[Phase] is the drive shaft, ■ is the bevel gear case, @ is the hitch, [phase], [phase]' is the hitch pin, X-X is the machine (1)
is the left and right center line of

Claims (1)

[Claims] A transmission case (6 ), a rear cover (7) is fixed to the rear surface of the transmission case (6), and a bevel gear (8) is attached to the rear cover (7) to align the axis of rotation of the machine. A pair of bevel gears (9), (10) are supported so as to match the left-right center line X-X of (1) and mesh with the bevel gear (8); a switching shaft (13) on which bevel gears (9) and (10) are loosely fitted so that clutch claws (11) and (12) carved on the side surface of the switching shaft (10) face each other;
A main component such as a shift fork (15) that slides a switching pawl (14) wedge-fitted onto the switching shaft (13) from side to side to selectively engage the clutch pawls (11) and (12). A forward/reverse switching device for a bevel gear (8) consisting of parts is provided in the transmission case (6), and a spline hole (16) is opened toward the rear at the rotation axis of the bevel gear (8). The front end of an upper shaft (17) is wedged into the spline hole (16), and a drive (18) is suspended from the rear part of the upper shaft (17) via a bevel gear transmission. The upper shaft (17) and drive shaft (18) are connected to the bevel gear case (19 ), and a small bevel gear (2
0) is wedge-fitted, and the large bevel gear (21) meshing with the small bevel gear (20) is fixed to the rotary shaft (5), and the rotary shaft (5) is aligned with the drive shaft (18). The rotary shaft (5) is fitted with a bevel gear case (
19), so that the direction of rotation of the rotary shaft (5) can be switched between forward and reverse by operating the shift fork (15) of the forward/reverse switching device. At the same time, a hitch (22) having a U-shaped cross section is fixed to the rear surface of the rear cover (7), and the front end of the bevel gear case (19) is attached to the U-shaped portion of the hitch (22). The front end of the upper shaft (17) is inserted into the hole (52) drilled in the front surface of the hitch (22).
) and wedges into the spline hole (16) of the bevel gear (8), connecting the left and right pin holes A (23), (23)' drilled in the hitch (22) and the bevel gear case (
Left and right pin holes B (24) drilled in the front end of 19)
, (24)' and two hitch pins (25), (25)
By inserting ', the tilling section (4) will be
A drive device for a rotary shaft in a walk-behind agricultural vehicle, characterized in that the rotary shaft (5) is driven by being attached to the vehicle.