JPS61181301A - 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 Application Field The present invention is for driving a rotary shaft in the tilling section of a walk-behind agricultural vehicle using a shaft drive system, and for switching the direction of rotation of the rotary shaft between normal rotation and reverse rotation. It is possible to switch from normal rotation to reverse rotation and from reverse rotation to normal rotation by simply turning the rotary shaft 180 degrees in a plane without requiring a special forward/reverse switching device on the machine side. 3 in vision
It is constructed so that it can be rotated 60 degrees in any direction and driven while being locked in any position, and the tilling section can be attached and detached from the machine by the extremely simple method of inserting and removing two hitch pins. It is an object of the present invention to provide an improved drive device for a walking agricultural vehicle by configuring the walking agricultural vehicle so that it can be used for multiple purposes.

(b) Prior art Japanese Patent Application No. 15357/1983 proposes a drive device for a rotary shaft in a walk-behind agricultural vehicle. An overview of the conventional technology proposed in this specification is as follows.

A forward/reverse drive device that can switch and rotate a rotary shaft of a tiller in a walk-behind agricultural vehicle in either forward or reverse directions, without providing a forward/reverse switch in a transmission case. The rotary shaft is driven by a shaft drive system via a bevel gear transmission, and by rotating the rotary shaft 180 degrees in a plane, the direction of rotation of the rotary shaft can be switched between forward and reverse rotation. It has a configuration that allows it to be locked at any position of 66o0 in plan view and driven.

(c) Problems to be solved by the invention However, the conventional technology proposed in the above-mentioned Japanese Patent Application No. 58-15557 does not give sufficient consideration to the ease of attaching and detaching the tilling section to the machine. do not have. That is, the tilling section is attached to the machine by connecting the rotary frame and bevel gear case that make up the tilling section to the pitch and transmission case of the machine. Therefore, when removing the tiller and attaching another working machine such as a pear or trailer to the hitch, it is necessary to cover the upper rear surface of the transmission case, where the bevel gear case was tightened, with another member. It's complicated. In order to utilize agricultural vehicles for multiple purposes, consideration should be given to allowing the tiller section to be easily attached and detached.

Therefore, we created a hole in the front of the hitch installed at the rear of the transmission case, and configured the shaft drive method to take out power from this hole to drive the rotary shaft of the tiller, via a bevel gear transmission. and rotate the rotary shaft to 180
The rotation direction of the rotary shaft can be switched between forward and reverse rotation by rotating the rotary shaft in a plane, and the rotary shaft can be locked and driven at any position of 560° in a plan view. There is a need for a rotary shaft drive device that can be attached to and detached from the machine by the extremely simple method of inserting and removing two hitch pins, and thereby making it easier to use agricultural vehicles for multiple purposes. This is possible.

2) Means for solving the problems As a means for solving some of the problems mentioned above, in the present invention, the power of the prime mover (2) mounted on the machine (1) is In a walk-behind agricultural vehicle having a transmission case ■ for transmitting power to the running wheels ■, d and the rotary shaft ■ of the tilling section (4), a rear cover ■ is fixed to the rear surface of the transmission case ■; The rear cover ■ has a bevel gear A■ that aligns the rotation axis with the left and right center line of the machine ■
A spline hole (2) is opened toward the rear at the rotational axis of the bevel gear A (2), and the front end of the upper shaft [phase] is wedged into the spline hole (2). A drive shaft ■ is suspended from the rear of the shaft [phase] via a bevel gear transmission, and the axis of the drive shaft ■ and the axis of the upper shaft [phase] are aligned with the left-right center line X-X of the machine ■. Fix the large bevel gear ■ that meshes with the upper shaft to the rotary shaft ■ so that the gear matches the upper shaft ■, and connect the rotary shaft ■ to the drive shaft so that the rotary shaft ■ is driven at right angles to the drive shaft ■. The drive shaft case ■ is rotatably supported and locked at the bottom of the bevel gear case [phase] so that it can be rotated around the axis of the drive shaft ■. It is configured to be able to lock the rotation of the drive shaft case ■ by a locking device [phase] consisting of main members such as a pin [phase], a spring @, a locking hole ■, and a [phase] - 鈥? , the rotary shaft (■) can be rotated in a plane and driven by locking it at any position, and a hit [phase] having a U-shaped cross section is fixed to the rear surface of the rear cover (■). The U-shaped part of the hitch ■ is the bevel gear case @
The front end of the upper shaft [phase] is inserted, and the front end of the upper shaft [phase] protrudes forward beyond the hole drilled in the front surface of the hitch.
The left and right pin holes A■, ■' are wedged into the spline hole ■ of ■, and are drilled in the hitch [phase], and the left and right pin holes B@, @' are drilled in the front end of the bevel gear case @. By inserting two hitch pins @ and @' into the tilling section■
is attached to the machine (1) to drive the rotary shaft (1), thereby forming a driving device for the rotary shaft (2).

(E) Function First, in ordinary tillage work, the sliding gears ■ and ■ are selected and meshed with the fixed gears @ and [phase] by operating a speed change mechanism (not shown) and run at the desired speed. Set the wheels ■ and Akira to rotate in the direction of the arrow (A). On the other hand, sliding gear■
, [phase] is operated by a transmission mechanism (not shown) to change the fixed gear@,
Select ◎ to engage, and set the rotary shaft ■ to the desired rotation speed. The direction of rotation of the rotary shaft ■ is as shown in Figure 4, when the large bevel gear ■ is located to the right of the left-right center line ), and in this state, the main clutch lever [phase] is operated and the tillage work is performed by the power of the prime mover (2) via a power disconnection mechanism (not shown). It is. In this state, the rotary shaft (2) rotates in the same direction (A) as the rotation direction (A) of the running wheels (2) and (2), which is a so-called forward rotation use state. To switch the rotation direction of the rotary shaft ■ from the forward rotation direction (to) to the reverse rotation direction (g), first pull the locking pin ■ in the direction of the arrow (c) to engage it with the locking hole ■. Release the stopped state, hold the tiller claw and open the drive shaft case 18
00 turns, insert the locking pin ■ into the locking hole [phase]' that faces the locking hole ■ with a phase of 180°, and lock the large bevel gear as shown in Figure 5. ■ will be located to the left of the left-right center line It rotates. Moreover, the direction of the working equipment such as the tilling claws [phase] is also oriented in accordance with the direction of reversal (G), as shown by the chain line ■' in Figure 1. There is no need to remove it and swap the left and right sides.

When this rotation in the reverse direction (G) is used for tilling work in hard fields in addition to trenching work, stable tillage work can be performed without causing the so-called dashing phenomenon in which the machine body jumps forward. It is also extremely useful for tillage work that buries compost, straw, etc. into the soil. In addition, in the ridge breaking work, if you perform the work by tilting the rotary shaft ■ either to the left or right with respect to the direction of movement of the aircraft in plan view, that is, by setting the rotary shaft ■ at the position shown by the dotted line in Figure 2. , the performance of the ridge breaking work is improved. Therefore, in the same manner as in the case of 180 turns described above, the locking pin [phase] is operated to tilt and lock the rotary shaft (2) in the desired direction, thereby performing the ridge breaking work. In addition, when you want to reverse the rotation direction of the rotary shaft (■) at a tilted position, by turning the rotary shaft 180 degrees from the tilted position, you can rotate only the rotation direction in the opposite direction without changing the tilted position. It is. In addition, when removing the tiller part ■ from the machine ■ and performing plowing work or trailer work, loosen the bolt [phase] and pull out the two hitch pins @ and @' to remove the hitch [phase]. If you pull out the bevel gear case @ that is fitted into the shape part from the hitch [phase], the wedged state between the front end of the upper shaft O and the wedged bevel gear A■ will be released, and the tilling part ■ will be removed from the machine. It is removed from ■. Then, pears and trailers are attached to the pitch 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 ■, d, a transmission case ■, a hitch 0, a handle [with], etc. ■ is an upper shaft [phase], a drive shaft This is the tilling section of a walk-behind agricultural vehicle, which is equipped with ■, a bevel gear case @, a drive shaft case ■, a rotary shaft ■, a tilling claw [phase], a tail wheel ■, etc. The power of the prime mover (2) is transmitted via the engine pulley O, V-belt [phase], input pulley [phase], etc., to the input shaft ■ by operating the main clutch lever [phase] that controls the power connection/disconnection mechanism (not shown). is transmitted. Fixed gears @, @ are fixed to the input shaft (2), and sliding gears (2), (2), which selectively slide and mesh with the fixed gears (2), are wedge-fitted into the intermediate shaft (2) so as to be slidable.

The transmission gear ■ fixed to the intermediate shaft ■ is connected to the wheel shaft [phase] via a transmission device (not shown) meshing with the transmission gear @.
is driven, and the left and right running wheels (2) and (2) mounted on the wheel shaft (phase) 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 (2) when the walking agricultural vehicle moves backward via a transmission (not shown).

In addition, sliding gears [phase] and [phase] for transmitting power to the rotary shaft ■ of the tilling section (4) are slidably wedged into the input shaft ■, and are fixed to the intermediate shaft ■. Fixed gear @
, ■ are configured to selectively slide and engage. A rear cover ■ is fixed to the rear surface of the transmission case ■ with a set screw 0, and a bevel gear A ■ is supported on the rear cover ■ so that its rotation axis coincides with the left-right center line X-X of the machine ■. and the bevel gear A■
A spline hole (2) opens rearward at the rotation axis. The upper shaft [phase] is in the spline hole ■ of the bevel gear A■.
The front end is wedged in, and the upper shaft [phase] extends rearward. The bevel gear A■ constantly meshes with the bevel gear B■ fixed to the intermediate shaft 0, and drives the upper shaft [phase]. A bevel gear C [phase] is fixed to the rear end of the upper shaft [phase], and the bevel gear C■ meshes with a bevel gear DO fixed to the upper end of the drive shaft ■ to drive the drive shaft ■.

The drive shaft {circle around (2)} hangs downward at the rear of the upper shaft [phase] via a bevel gear transmission device consisting of the bevel gear C [phase] and the bevel gear D@. The axes of the upper shaft [phase] and the drive shaft (■) are both supported by the bevel gear case @ so that they coincide with the left-right center line X-X of the machine (■). A small bevel gear ■ is wedge-fitted into the lower part of the drive @ old Φ, and a large bevel gear 0 that meshes with the small bevel gear 0 is fixed to the rotary shaft ■, and the rotary shaft ■ is perpendicular to the drive shaft ■. The rotary shaft ■ is supported at the bottom of the drive shaft case so that it can be driven in the correct position. Tilling claws are attached to the left and right sides of the rotary shaft ■. The upper part of the drive shaft case [phase] fits into the lower part of the bevel gear case @, and the drive shaft case [phase] fits around the axis of the drive shaft (4).
It is supported in the bevel gear case @ by a stop ring ■ so that the phase] can rotate. The cylindrical part ◎ that fits into the bevel gear case @ of the drive shaft case ■ has a large number of locking holes [phase], ■′, ko′, etc., and the locking holes [ Phase], B, Determining'...... there is a locking pin [that is removably installed in the bevel gear case @].
The tip of the [phase] is engaged and the locking state is maintained with the locking hole ■, [phase]', *', etc. by the spring ■, the spring receiver [stock], etc. ing. Therefore, pull the locking pin [phase] in the direction of the arrow (c), and the locking hole [phase] -1 po...
After releasing the locking state with ..., hold the tilling claw [phase] in your hand and rotate the rotary shaft ■ in the plane, the rotary shaft ■ will turn in the arrow direction Since it can be rotated, the locking holes [phase], [phase]′, [
By setting the locking pin [phase] into the locking hole ■, [phase]′, σ, etc. at the desired position, the locking shaft can be set. (2) can be locked at any position and driven.

The locking device [phase] referred to in this specification refers to a locking pin [phase],
Spring O, spring holder [phase], locking hole [phase], [phase]', @”
A device consisting of main members such as..., which locks the rotation of the drive shaft case (■) relative to the bevel gear case (@).

■ is the tail wheel frame, and the front end has a bevel gear, which is fixed to the bevel gear case @, the tail wheel frame ■, etc.

[Phase] is a hitch with a U-shaped cross section, and is fixed to the rear surface of the rear cover ■ with bolts @. Two pin holes A■ and ■' are drilled on the left and right sides of the hitch [phase], and a hole [phase] is drilled on the front surface through which the front end of the upper shaft [phase] can protrude. . The front part of the bevel gear case @ fits into the U-shaped part of the hitch [phase], and left and right pin holes B@, d are bored at positions corresponding to the pin holes A■, 0' of the pitch [phase]. . ■, 0' are hitch pins that are inserted into the pin holes A, ■' of the hitch [phase] and the pin holes B@, @' of the bevel gear case 0, and the tilling part ■ is attached to the machine (1). This is the configuration that will be used. ■ is a bolt screwed into the front of the bevel gear case @, which extends between the bolt and the rear of the hitch ■ to securely attach the tiller ■.

In this embodiment, the front end of the upper shaft [phase] is wedged directly into the spline hole ■ of the bevel gear A■, but the front end of the upper shaft [phase] is shortened to fit the spline hole ■ and the upper shaft [ It is understood as a commonly used means that a joint such as a universal joint or a coupling may be interposed between the front end of the bevel gear A■ and the front end of the upper shaft [phase] to transmit the rotating shaft of the bevel gear A■ to the upper shaft [phase]. It should be.

(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 rotates the rotation direction of the rotary shaft in the forward direction,
There is no need to install a special device for switching to reverse rotation using gears, etc. as in the past, and switching from forward rotation to reverse rotation and from reverse rotation to forward rotation can be done simply by rotating the rotary shaft 180 degrees in a plane. Furthermore, as the rotary shaft rotates 180 degrees in plane, the direction of working equipment such as tilling claws automatically changes to correspond to each direction of rotation, so it is easy to remove the working equipment from the rotary shaft. This is a rotary shaft forward/reverse drive device that eliminates the need for left and right switching, and has extremely excellent handling.Moreover, the rotary shaft can be rotated on a plane and locked at any position for driving. Since the rotary shaft can be set in any direction in plan view, it is also possible to switch between forward and reverse rotation in the set direction, making management work easier. Since the rotary shaft posture and rotation direction can be adapted to any working conditions, this machine can demonstrate usefulness and extremely excellent working characteristics that cannot be expected from conventional agricultural vehicles. Since the power from the bevel gear installed in the side transmission case is extracted from the hole drilled in the front of the hitch, the tilling section is driven by a shaft drive system using bevel gear transmission. It is now possible to attach and detach the tiller to the machine using the extremely simple method of inserting and removing two hitch pins, and it is now possible to remove the tiller instead of attaching the tiller and rotating the rotary shaft in the forward or reverse direction for plowing or management work. It can be said to be an excellent rotary shaft drive device because it can be used for a wide range of tasks, from plowing to plowing and trailer work, and the agricultural vehicle can be used for a variety of purposes.

[Brief explanation of the drawing]

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. Figure 2 is a side cross-sectional view of the main part taken along the line X-X in Figure 2, Figure 4 is a cross-sectional view of the main part taken along the Y-Y line in Figure 2, and Figure 5 shows the Rokuri axis in Figure 4 rotated by 180 planes. A sectional view of the position, FIG. 6 is a top view of the pitch 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 A, @l is the upper shaft, ■ is the drive shaft, @ is the umbrella float case, and ■ is the bevel gear A. Drive shaft case, ■ is locking device, [phase] is hitch, ■,
■' is the hit pin, and X-X is the left and right center line of this machine ■.

Claims (1)

[Claims] A transmission case (6 ), a rear cover (7) is fixed to the rear surface of the transmission case (6), and the rear cover (7)
A bevel gear A (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 A (
A spline hole (9) is opened toward the rear at the rotation axis of 8), and the front end of the upper shaft (10) is wedged into the spline hole (9). A drive shaft (11) is suspended via a bevel gear transmission, and the axial center of the drive shaft (11) and the axial center of the upper shaft (10) coincide with the left-right center line X-X of the machine (1). so that the upper axis (
10) and drive shaft (11) are bevel gear case (12)
A small bevel gear (13) is wedge-fitted to the lower part of the drive shaft (11), and a large bevel gear (14) meshing with the small bevel gear (13) is mounted on the rotary shaft (5). The rotary shaft (5) is fixedly installed and supported at the lower part of the drive shaft case (15) so that the rotary shaft (5) is driven at right angles to the drive shaft (11). 15) is rotatably supported at the lower part of the bevel gear case (12) so that it can be rotated around the axis of the drive shaft (11), and the locking pin (16) and the spring (
17), the rotation of the drive shaft case (15) can be locked by a locking device (19) consisting of main members such as locking holes (18), (18)', and (18)''. The rotary shaft (5) can be rotated in a plane and driven by locking it at any position, and the rear cover (7) has a hitch (20) having a U-shaped cross section on the rear surface. is fixed to the hitch (20), the front end of the bevel gear case (12) is fitted into the U-shaped part of the hitch (20), and the front end of the upper shaft (10) is inserted into the hole drilled in the front surface of the hitch (20). Bevel gear A protrudes forward from (56)
(8) into the spline hole (9) and hitch (20).
Left and right pin holes A(21) and (21)' drilled in
By inserting two hitch pins (23), (23)' into the left and right pin holes B (22), (22)' drilled in the front end of the bevel gear case (12), the tilling part (4 ) is mounted on the machine (1) to drive the rotary shaft (5).