JPS6261502A - Claw shaft replacement auxiliary device - 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) Field of Industrial Application This invention relates to a device for changing the pawl shaft of a forward/reverse rotary tiller.

(B) Prior art This type of rotary tilling device has a special forward/reverse shoulder pawl attached to the tilling shaft and a clutch mechanism in the transmission case is appropriately switched to enable forward/reverse tilling. Some systems are configured so that after reversing the direction of the attached tilling shaft, the clutch mechanism is switched to perform forward and reverse tilling.

(c) Problems to be solved by the invention However, among the conventional devices mentioned above, the former type has a special and large claw shape, increases weight, and has poor tillage performance compared to hatchet claws. It has the disadvantage that it falls off. Also, in the latter type, replacing the pawl shaft is troublesome. To be more specific, in this configuration, after removing the bolts at both ends of the claw shaft, it is necessary to support it with both hands and turn it back and forth, and since the claw shaft is heavy, the task of replacing the bolts is difficult.

(d) Means for solving the problem This invention is proposed in view of the above-mentioned shortcomings of the conventional devices, and uses hatchet claws to maintain superiority in plowing performance, while also making it possible to replace the claw shaft. It is an object of the present invention to provide an auxiliary device for changing a pawl shaft easily.

For this reason, the present invention has taken the following technical measures.

That is, it is detachably attached to the rear part of the hitch 14 of the forward/reverse rotary tiller 1 which is configured to provide different forward and reverse rotations to the pawl shaft 9 by switching the clutch mechanism housed in the transmission case 6. Claw shaft replacement auxiliary device 1
7, this claw shaft replacement auxiliary device 17 includes an arm portion 19 that fits and holds the claw shaft 9 from behind, and an arm portion 19 that rotates the arm portion 19 around the horizontal axis 22 while holding the claw shaft 9. The nail shaft exchange assisting device is provided with an adjustment handle 39 to obtain the nail shaft, and the tip of the arm portion 19 is configured to be swingable.

(e) Embodiments and their effects The present invention will be described in detail below with reference to the drawings. First, to explain the configuration, reference numeral 1 denotes a forward and reverse rotary tilling device, and this rotary tilling device 1 has a 3.
It is suspended and supported via a point link mechanism 5 so that it can be raised and lowered freely.

The rotary tilling device 1 includes a transmission case 6 on which an input shaft (not shown) is mounted, a chain case 7, a tiller claw 8...
The input shaft (not shown) and the tractor 2 have a main cover 10 that covers the upper part of the tilling section, a mower cover 11 that is pivoted to the rear of the main cover 10, etc.
By interlocking and connecting the PTO shaft (not shown) of the
The power from the side is transmitted to the rotary tiller l side, and by appropriately switching the clutch mechanism (not shown) housed in the transmission case 6, the pawl shaft 9 is given rotation in different directions, forward and reverse. It is configured so that

Located on both the left and right sides of the transmission case 6, the lower links 3,
At the rear of the plates 12, 12 connected to the rear ends of the
Rotary hitch consisting of a hollow pipe towards the rear 13.
A slide hitch 15, which is similarly made of a hollow pipe and has a horizontal pipe 14 fixed to its rear end, is fitted into these two pipes. The position of the slide hitch 15 with respect to the rotary hitch 13 is adjusted by inserting and removing a fixing means such as a pin.

Further, a U-shaped frame member 16 is welded and fixed to the horizontal center portion of the horizontal pipe 14, and mounting portions for various working machines are configured here.

Next, the structure of the claw shaft replacement auxiliary device that is fitted and attached to this U-shaped frame member 16 will be explained.

The pawl shaft replacement auxiliary device 17 has a support pipe 18 and an arm rod 19, and a U-shaped pitch 20 that fits into the U-shaped frame member 16 is fixedly provided on the upper part of the support pipe 18. Furthermore, two plates 21 and 21 are installed at the bottom of the support pipe 18.
are welded toward the front, and an arm rod 19 is rotatably pivoted between the plates 21 and 21 with a pin 22. A through hole 23 is bored at the tip of the support pipe 18, and shafts 25, 25 of a piece 24 are inserted and held in this through hole 23, and a U-shaped arm 26 is inserted into the piece 24, and a U-shaped arm 26 is attached to the shaft. It is rotatably supported around an axis perpendicular to the axis of 25.

In addition, 27 is a pin for preventing removal. 28 is a screw for adjusting the rotation angle of the arm rod 19 with respect to the support pipe 18, and its front and rear ends are shown in FIGS. 5 and 6. Arm rod 1 through two pieces 29°30
9 and a support pipe 18. To explain in more detail, there are two plates 31.3 on the central back part of the arm rod 19.
1 is welded, and the shafts 32, 32 of the piece 29 are attached to the plates 31,
31, and the tip of the screw 28 is inserted through this piece 29, and is prevented from coming out by a pin 34.

On the other hand, a U-shaped plate 35 is fixed to the lower end of the support pipe 18, and the pieces 3 are inserted into the through holes 36 and 36 of this plate 35.
0 shafts 37, 37 are inserted into the piece 30, and a female threaded portion 38 is provided inside the piece 30. The threaded rod 28 is screwed into this female threaded portion 38, and an adjustment handle 39 is attached to the end thereof. ing.

In addition, the reference numeral 40 in the figure indicates the rotary hit 13 and the mast 41.
The plowing depth adjustment handle 42 interposed between the plowing depth adjustment handle 42 is a pin for fixing the replacement auxiliary device 17 to the horizontal pipe 14 of the slide hitch 15.

Next, the operation of the upper side will be explained.

When changing the direction of the claw shaft 9 from forward rotation work to reverse rotation work or vice versa, first lift the rotary tiller 1 and attach the replacement auxiliary device E to the claw shaft 9, as shown in FIG.
Fit the U-shaped arm 26 of 17 from the rear and insert the retaining pin 27, and in this state, insert the U-shaped arm 26 of the replacement auxiliary device 17 into the U-shaped frame member 16 fixed to the horizontal vibe 14 of the slide hitch 15. Fit and install the mold hitch 2o.

Then, remove the bolts on the flanges provided at both ends of the claw shaft 9, hold the claw shaft 9 with the arm rod 19, and attach the handle 3.
9 is turned to lower it using the pin 22 as a fulcrum (position A shown by the dashed line in FIG. 7), and the claw shaft 9 held by the U-shaped arm 26 is reversed by 1800 degrees.

Then, perform the operation in reverse to the previous procedure to remove the claw shaft 9.
is supported at a predetermined position between the chain case 7 and the opposite side plate (not shown), and is rotatably attached.

In this state, the replacement auxiliary device 17 is removed from the rotary tilling device 1, the clutch mechanism in the transmission case 6 is switched, and rotary tilling work is performed.

Thus, according to this embodiment, the rotary tiller 5!
1, attach the claw shaft replacement auxiliary device 17 to the hitch, engage the tip of the arm rod 19 with the middle part of the claw shaft 9, and turn the handle 39 to cover the tilling section 10.11. Since the claw shaft 9 can be lowered to a position where it does not get in the way, and the claw shaft 9 is then rotated, the work of reversing the claw shaft 9 can be performed extremely easily and safely.

In particular, in this embodiment, since only the substantially central portion of the claw shaft 9 is held by the U-shaped arm 26 (FIG. 7), the claw shaft 9
Although both ends of the ridge swing up and down, it is more convenient to swing in this way because it is easier to rotate in response to changes in the unevenness of the ridge when the claw shaft 9 is reversed.

(F) Effects of the Invention The present invention, configured as described above, provides the following technical effects. In other words, the pawl shaft replacement auxiliary device 17 is a rotary tiller! Since it is removably attached to the pitch of 1, it can be attached as needed, and it can be attached to all rotary tillers without taking up much space.
Its handling becomes very easy.

Furthermore, since there is no need to hold the heavy pawl shaft 9 by hand during reversal work, the pawl shaft 9 can be easily and quickly attached and removed without any effort, greatly improving work efficiency. .

[Brief explanation of the drawing]

1 is a side view, FIG. 2 is a perspective view, FIGS. 3 to 6 are sectional views of essential parts, and FIG. 7 is a side view. Explanation of symbols (1) Rotary tiller (2) Tractor (3) Lower link (4) Top link (5) Three-point link mechanism (6) Transmission case (9) Pawl shaft (17) Replacement auxiliary device (18) Support Pipe (19) Arm rod (26) U-shaped arm (39) Handle

Claims (1)

[Claims] It is detachably attached to the rear of the hitch 14 of the forward/reverse rotary tiller 1 which is configured to provide different forward and reverse rotations to the pawl shaft 9 by switching the clutch mechanism housed in the transmission case 6. A claw shaft replacement auxiliary device 17 includes an arm portion 19 that fits and holds the claw shaft 9 from behind, and a horizontal shaft 22 that connects the arm portion 19 while holding the claw shaft 9. The nail shaft exchange assist device is provided with an adjustment handle 39 that can be rotated around the clockwise direction, and the tip of the arm portion 19 is configured to be swingable.