JPS5880031A - Connection device for work equipment - 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 The present invention relates to a coupling device for coupling a working machine such as a rotary tiller to a tractor.

If a rotary tiller can be towed by reversing it back and forth while keeping the orientation and rotation direction of its tilling claws constant, it can be used for tilling in the forward rotation state (down cut) and tilling in the reverse rotation state (down cut). This is preferable from a practical point of view because it allows the user to freely select the up-cut (up-cut) and improves adaptability to field conditions, etc., but in order to do so, all connecting members must be removed and replaced in the opposite direction. This required a great deal of effort.

This invention is a tractor PTO system like a rotary tiller.
The input shaft connected to the shaft is equipped with a transmission gear case with a protruding input shaft, and on both left and right sides of the gear case there are parts that can be used as connection mounting members like the transmission shaft case. *Provides a convenient coupling device for use in coupling commercial machinery to tractors, as described below.

In the coupling device according to the present invention, U-shaped clamping tools that fit with the mounting member of the work machine are arranged side by side with an interval larger than the width of the gear case, and when connecting, the U-shaped clamping tools are arranged side by side with a distance larger than the width of the gear case, and when connecting, A contact member is provided that contacts the seat of the work equipment at a position that is far away, and the left and right mounting members are respectively fitted into the recesses of both clamping tools so as to sandwich the gear case. and a connecting means for connecting the connecting device itself to the tractor. It is a feature. Embodiments of the present invention shown in the drawings will be described below.

FIG. 1 is a side view showing how a rotary tiller (B) is connected to a tractor using a connecting device (A) according to the present invention, and FIG. 2 is a rear view of the main parts.

The connecting device (A) includes a 1° pair of brackets 1 spaced apart from each other, and both brackets are connected to a groove frame 2 having a generally V-shaped groove 2a at the upper part thereof. There is. The bracket 1 is a U-shaped clamp 5 that opens downward.
The opening of the clamp has 5 pin holes on both sides.
A is drilled.

A protruding piece 2b is fixed to the upper surface of the grooved frame 2, and a mast 3 is attached to this. A column 4 whose lower end is attached to the bracket 1 is pinned to the mast 3. Further, a support member 3a is provided protruding from the lower part of the mast 3, and a jack 6 is attached to this support member 3a. A rearwardly protruding support frame 7 is pivotally attached to the rear of the bracket 1 by means of attachment pins 8, and a pair of left and right tail wheels 9 are attached to this. The jack 6 is pinned to the middle part of the support frame 7, and the jack 6 can adjust the vertical position of the tail wheel 9. Incidentally, the tail wheel 9 and the support frame 7 are not necessarily necessary for this coupling device.

A rotary tiller, which is a working machine, includes a tilling shaft 11 on which tilling claws 1o are planted, and a rotary cover 12 that stores the tilling shaft.
, transmission chain case 13, transmission gear case 1
4. The gear case is provided with horizontal pipe-shaped base frames 15, 15', etc. fixed to the left and right sides of the gear case. One pipe-shaped base frame 15 also functions as a transmission shaft case, and a chain case 13 is attached to its outer end, and one end inside thereof is connected to a bevel gear device housed in a gear case 14. , chain case 13 at the other end
A transmission shaft 17 to which an inner upper sprocket wheel 6 is attached is housed. A vertical base member 18 is fixed to the outer end of the other base frame 15', and a bearing 19 for supporting the tilling shaft 11 is provided at the lower end of the vertical base member 18. The rotary cover 12 is connected to the chain case 13.
The main cover 12a is fixed to the main cover 12a and the vertical base member 18, and the cover 12b is pivoted to the main cover 12a. However, if necessary, a front cover can be hung from the front part of the main cover 12a. . The rear cover 12b is
Prevents soil scattering and improves li after tilling! It plays the role of leveling the field, and is connected to the support frame 7 by a hanging rod 20, and when the field after tilling is too high, it is rotated upward against the spring 21. You can move or not.

The gear case 14 is disposed at the upper center of the rotary tiller, and has input shafts 14a and 14b at the front and rear thereof. One of the input shafts 14a and 14b is connected to the PTO shaft of the tractor via a universal joint, and each has a bevel gear and a gear that mesh with a bevel gear provided on the transmission shaft 17. Rotational power transmitted from the PTO shaft of the tractor to the transmission shaft 17 via the input shaft and bevel gear device is transmitted to the tilling shaft 11 via the upper sprocket wheel 16, chain 16' and lower sprocket wheel 16' in the chain case.
and rotates the tilling shaft 11. Cultivation axis 1
The rotational power may be transmitted to the intermediate portion of 1. Incidentally, on the upper surface of the gear case 14, a fitting protrusion 22 having a generally square cross section is provided which fits into the square groove 2a of the grooved frame 2 provided in the coupling device. This fitting protrusion 22 functions as a seat on the working machine side, and the grooved frame 2 functions as an abutting member that abuts on this seat.

The coupling device (A) is connected to a rotary tiller (B), which is a working machine, by inserting the pipe-shaped base frames 15 and 15' into the recesses of the two clamping tools 5, respectively, with the gear case 14 positioned between the two clamping tools 5. At the same time, the fitting protrusion 22 is fitted into the groove 2a of the grooved frame 2, thereby attaching the grooved frame 2. Groove 2a
As shown in Figure 4, the inner surface of the

A contact plate 25 is provided. The abutting plate 25 is supported by a support pin 28 provided with a spring 27 to ensure a good fit between the fitting protrusion 22 and the groove 2a. The grooved frame 2 is also provided with a lock bolt 29 that presses the abutting plate 25, so that a tight fitting state can be obtained by tightening the lock bolt 29 while the fitting protrusion 22 is fitted. It has become. Although these contact plate 25° lock bolts 29 and the like are not necessarily necessary, it is practically advantageous if they are provided. The open end of the clamp holder 5 has a stopper 2 having a through hole 23a.
3 is applied to the lower side of the pipe-shaped base frame 15, 15', the pin hole 5a of the clamping tool 5 and the through hole 23 of the stopper 23 are
The work machine cannot be separated from the mounting that passes through a. The force f1 may be used to close the open end of the clamp 5 using only the pin 24.
It is preferable to interpose a stopper having a concave curved surface 23b that makes good contact with the outer circumferential surface of the pipe-shaped base frames 15, 15' as shown in the illustrated example, since the fixing state becomes better. The pin 24 in the illustrated example is provided with a locking piece 24a that locks onto the clamp or the holder 5, and the locking hole 24b for inserting the locking pin 26 is always directed upward.

In this way, the coupling device (A) is connected to the rotary tiller (B
), but in this state, the abutting portion between the grooved frame 2, which is the abutting member, and the fitting protrusion 22, which is the seat, is one, the two clamping holders 5, and the pipe-shaped base frames 15, 15, which are the mounting members. It is located at a position (above) away from the line connecting the left and right fitting portions (X-X line in FIG. 2). in this way,
Since the coupling device and the working machine are in contact with each other at a position away from the fitting portion between the clamping tool 5 and the mounting member, rotation of the working machine with respect to the coupling device is effectively prevented, and the coupled state is strong. It becomes. In the illustrated example, a ■-shaped groove is provided in the contact member of the coupling device, and the catch on the work machine side is formed as a protrusion that fits into this groove. A recess into which the protrusion fits may be provided on the seat side. Alternatively, the contact member and the seat may be brought into contact with each other on a flat surface.

As shown in the illustrated example, a better fixing state can be obtained by making contact by the fitting method using the ■groove and ■-shaped protrusion.

The connecting device connected to the working machine is used by being connected to the tractor by an upper link 26 connected to the mast 3 and a lower link 27 connected to the bracket 1.

FIG. 3 shows a state in which the coupling device (A) is separated from the working machine (B) and rotated upward by the lift of the tractor (C). In this state, the lock bolt 29 is loosened, The pin 24 has been removed from the pin hole 5a of the clamping tool 5. It is easy to connect and disconnect the connecting device (A) and the working machine (B).

The work machine separated in this way can be turned over or repaired independently. By holding the working machine as it is and turning the tractor to which the coupling device is attached, the working machine can be easily reversed and attached.

FIG. 5 is an enlarged view of the clamping tool 5, which can also be installed horizontally as shown in the figure.

As explained above, the coupling device according to the present invention includes a pair of U-shaped clamping tools that are spaced apart from each other by a distance larger than the width of the gear case of a working machine, and a contact member that abuts the seat of the work equipment at a position, and with the clamping tools arranged on both sides of the gear case, fit the mounting member provided on the work machine, and place the abutment member on the catch. Since it is connected to the work machine by making contact with it and closing the free end of the clamp with a pin, it is possible to connect and disconnect from the work machine with a simple operation, and it is also easy to connect and disconnect the work machine to the work machine. When attached, a stable connection can be achieved. It is convenient to use an existing pipe-shaped base frame as the mounting member for the work machine, as shown in the illustrated example, since no special mounting member is required. Note that it is extremely effective if this coupling device is used as a coupling device for reversing a working machine such as a rotary tiller.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of the coupling device according to the present invention in use, Fig. 2 is a rear view thereof, and Fig. 3 is a side view showing the state in which it is separated from a working machine. Figure 5 (
a) and (b) are enlarged views of main parts. 1... Bracket, 2... Grooved frame, 2a... Groove,
3... Mast, 5... Clamping tool, 5a... Pin hole,
7...Support frame, 11...Plowing shaft, 14...Gear case, 15, 15'..., Pipe-shaped base frame, 22...Fitting projection, 23...Block, 24... Pin 25...Touch plate. Patent applicant: Iseki Agricultural Machinery Co., Ltd. Agent: Patent attorney: Hiroshi Sugawara Figure 1

Claims (1)

[Claims] (1) A coupling device for coupling a working machine to a tractor, which includes a transmission gear case with a projecting input shaft connected to the PTO shaft of the tractor, and mounting members are provided on both sides of the gear case. Then, the U-shaped clamping tools that fit with the mounting member of the work machine are arranged side by side with an interval larger than the width of the gear case, and when connecting, work at a position further away from the line connecting both clamping tools. A contact member that contacts the seat of the machine is provided, and the left and right mounting members are fitted into the recesses of both clamping tools so as to sandwich the gear case, and the contact member is brought into contact with the seat of the work machine, and the above-mentioned A coupling device for a working machine, characterized in that it is provided with a mounting means adapted to be attached to a working machine by closing the free ends of the clamping tools with pins, and a coupling means for coupling the coupling device itself to a tractor. . (ri) The connection device for a work machine according to claim 1, wherein the connection device is a connection device for reversing the work machine to which the work machine can be attached by reversing the work machine back and forth.