JPH0429682Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a work equipment mounting device for an agricultural tractor, and in particular to a mounting device suitable for a work equipment such as a single tiller to be attached to a rotary tiller of an agricultural tractor. It is.

Conventional technology Working equipment such as a single-layer potter is often used for making grooves at the edges of ridges, and for edging and edging work. Working machines such as this single tiller are used by being attached to a frame that extends to the rear of a rotary tiller (hereinafter simply referred to as rotary), but in this case, tension rods, etc. are generally used to reinforce the single tiller. reinforcing members are often used. In other words, in the case of a soil plate for ridge raising equipment, etc., the shape of the soil plate is symmetrical (both wings) around the support (pillar), so the left and right sides receive equal traction resistance during work, whereas the single wing shape This is because, in the case of a single-layer earthen pot, the structure is subjected to a twisting action toward the outside of the machine around the support, so a separate reinforcing member is required for strength in order to withstand this action. The distal end side of this reinforcing member is usually attached via a hitch provided on the side plate of the rotary so as to be freely movable up and down.

Problems that the invention aims to solve However, with the above structure, during work,
When vertically adjusting the single-layer soil pot (usually done by raising and lowering the frame by rotating the tail wheel handle), the change in frame height causes the difference between the rotary-side connection part of the reinforcing member and the single-side soil-side connection part. Since the distance changes, the effective length of the connecting member must be readjusted each time, which is a hassle.

Means to Solve the Problems Therefore, the present invention connects a work equipment mounting frame via a rotation shaft to an arm fixed to a rotary tiller so that it can be freely adjusted and fixed in vertical swing, and is attached to the frame. One end of a reinforcing member such as a tension rod for reinforcing a working machine is connected to the working machine, and the other end is attached to a rotary tiller via a hitch so that it can move up and down, and the rotation of the frame with respect to the arm is The above problem is solved by providing the rotational fulcrum axis of the reinforcing member so as to be located on the outside of the moving axis, and the rotational fulcrum axis of the reinforcing member being positioned on the same line as the rotational axis of the frame. This is what I am trying to do.

Function Even if the height of the frame is changed by turning the tail wheel handle to adjust the work machine up or down, the rotational fulcrum axis of the reinforcing member is located on the same line as the rotational axis of the frame, so the reinforcing member's The distance between the rotary-side connecting portion and the single-cultivator side connecting portion does not change. Therefore, when adjusting the working machine vertically, there is no need to readjust the effective length of the reinforcing member, and the vertical adjustment work of the working machine can be easily performed.

Embodiment 1 The first embodiment is an agricultural tractor, and a rotary tiller 2 is attached to the rear of the tractor via a three-point linkage mechanism 1a so as to be movable up and down. Reference numeral 3 denotes an arm fixed to the rotary tiller 2, and a chain case 4 is fixed to one end of the arm. In addition, a frame 6 for mounting a work machine is attached to a rotation shaft 7 on a mounting plate 5 integrated with the arm 3.
The frame 6 can be adjusted and fixed in vertical swing by rotating the tail wheel handle 8. 9 is a single pot, with 6 protruding upwards.
A pole (support) 10 made of a square pipe is integrally provided. Reference numeral 11 denotes a mounting bracket for the single earther 9, which is composed of a hexagonal pipe into which the above-mentioned single earther support 10 can be inserted and removed freely, and a rectangular tube 12 that fits into the frame 6 is fixed to the upper end of the bracket. 6 with fasteners (not shown) such as bolts and nuts. 13 is a gearbox, 14 is a rear cover, and 15 is a push bolt for fixing the mounting bracket. Reference numeral 16 designates a mounting bracket for the reinforcing member 17 welded to the lower end of the mounting bracket 11. In the illustrated example, the mounting bracket 16 is constituted by a round bar-shaped member having a relatively large circular arc portion 16'.

By the way, the reinforcing member 17 in the illustrated example is composed of a tension rod having a turnbuckle 17a, and connecting fittings 17b and 17c are fixed to both front and rear ends thereof, and the front connecting fitting 17b is connected to the work equipment mounting frame 6. A rotation fulcrum shaft 18 is connected to a hitch H which is located on the outside of the mounting plate 5 and is fixed to a side plate 4' fixed to the arm 3 of the rotary 2, and the rear connecting fitting 17c is connected to the mounting fitting 16.
are removably connected to each other via a connecting pin 19. The pivot shaft 18 is located on the same line as the pivot shaft 7 of the work machine mounting frame 6.

The one shown in FIG. 3 uses the rotating shaft 7 of the frame 6 as the rotating fulcrum shaft 18 of the reinforcing member 17, and
A collar 20 is provided at the fulcrum shaft portion of the frame 6, and the rotating shaft 7 of the frame 6 is loosely fitted into the collar 20. With this structure, even if the rotating shaft 7 is removed, the frame 6 still remains.
Because the load is applied to the fulcrum shaft, the collar 20
does not come off, making it easy to mount the rotating shaft 7, and since the collar 20 has a structure that supports the load of the frame 6, the operating force required to adjust the top and bottom of the soil potter using the tailwheel handle 8 can be reduced.

Figures 4 to 6 show a co-attached bracket in which the cylindrical pipe-shaped mounting bracket 11a of the single soil cultivator 9 is extended upward, and the rotary tail wheel 21 can be mounted upside down on the extended portion 11'a. This is intended to make it easier to carry the tail wheel 21 by a tractor when setting nine half-cultivators, and to improve the balance between the left and right sides of the rotary when working on the half-cultivators. 22 is a hole for attaching to the frame 6, 23 and 24 are holes for attaching the tail wheel, 24' is a push bolt for fixing the tail wheel, 25 is a push bolt for attaching a half-cultivator, Fig. 6 is the same as Fig. 4 This is a modified example.

7 to 10 show a structure in which the mounting bracket of the work machine and the support of the work machine are simultaneously fixed by a cam, and a ridge erector 9' is shown as the work machine. There is. That is, this mounting bracket 11b has two upper and lower plates 11d that sandwich the frame 6 welded to the cylindrical pipe part 11c, and the plate 11d and the frame 6 are connected by insertion pins 26, 26, so that the pipe part 1
A cam shaft 28 is provided between the cam shaft 1c and the frame 6, and is rotatably supported by a bearing 27 fixed to the pipe portion 11c, and has an operating lever 28a fixed to the shaft end, and a cam 29 is fixed to the cam shaft 28. has been done.
A notch 30 is provided in the pipe portion 11c so that the cam 29 can rotate, and a notch 30 is provided in the pipe portion 11c to allow the cam 29 to rotate.
As shown in FIG. 7, a chamfered portion a is provided on the surface facing the cam to regulate the orientation of the ridge erect body. 31 is a camshaft holding plate, 32 is a linch pin insertion hole, 33 is a rear cover, 34 is a rear cover pressing rod, and 35 is a rear cover opening/closing cover.

In this structure, when the lever 28a is rotated, the cam 29 contacts the ridge erector support column 9'a and the frame 6 at the same time and pushes them apart in the direction of separation, thereby fixing the mounting bracket 11b and fixing the ridge erector support column 9'. a
The ridge erector 9' can be fixed at the same time, the ridge erector 9' can be attached and detached and the depth can be adjusted with one touch, and even though it is an insertion pin type, it can be attached without play.

In addition, in the conventional mounting structure, as shown in FIG. 11, the bolts 36 and push bolts 37 were used to tighten and fix the bolts, respectively, which required tools to attach and detach, which was troublesome and took a lot of time.

Next, the devices shown in FIGS. 12 to 15 similarly utilize a cam to allow one-touch attachment and detachment of the work equipment. 11'c, and by rotating the cam 38 around the pipe part 11'c, the cam 38 is pressed against the frame 6 to prevent looseness at the connecting part between the frame 6 and the mounting member 11'b. The structure is simple and compact, and does not interfere with other mechanisms or parts. 39 is a washer, 40 is a push bolt, 41 is an operating lever integrated with the cam 38, and the other structures are substantially the same as those shown in FIGS. 7 to 10.

In the above configuration, when the tail wheel handle 8 is turned to adjust the height of the single soil pot 9 up and down, the frame 6
can be rotated up and down about the rotation axis 7, and the height of the single-layer soil pot 9 can be adjusted as desired. Due to this rotation of the frame 6, the reinforcing member 17 also rotates around the rotation fulcrum shaft 18.
8 and a frame 6 for mounting the work machine are supported by an arm 3 fixed to the rotary 2 via a plate 5 and a hitch H, respectively, and the reinforcing member 1
Since the rotational fulcrum shaft 18 of 7 is provided on the same line as the rotational axis 7 of the frame 6, the distance between the rotary 2 side connecting portion of the reinforcing member 17 and the single-cultivator 9 side connecting portion does not change. Therefore, the half-cultivator 9 can be smoothly moved up and down without any restrictions. This eliminates the need to readjust the effective length of the reinforcing member 17 by turning the turnbuckle when vertically adjusting the single-layer earther 9, and the operator can adjust the single-layer earther 9 vertically while remaining on the tractor.

The work equipment mounting device according to the present invention can also be used for work equipment other than the single-layer earther, such as a pile earther, a ridge shaper, a side ridger, and the like.

Effects of the invention As mentioned above, the present invention connects a work equipment mounting frame to an arm fixed to a rotary tilling device via a rotation shaft so as to be able to freely adjust and fix the work equipment mounting frame. One end of a reinforcing member such as a tension rod that reinforces the machine is connected to the work machine side, and the other end is attached to the rotary tiller via a hitch so that it can move up and down, and the rotation axis of the frame is connected to the arm. Since the rotational fulcrum shaft of the reinforcing member is located on the outside of the frame, and the rotational fulcrum shaft of the reinforcing member is located on the same line as the rotational axis of the frame, when vertically adjusting the working machine, There is no need to readjust the effective length of the reinforcing member each time, and the vertical adjustment work of the working machine can be easily performed.

[Brief explanation of the drawing]

Figure 1 is a plan view of a tractor equipped with the present invention;
Figure 2 is a side view showing how the single-cultivator is installed, Figure 3 is an enlarged plan view of a structural example in which the rotation axis of the frame and the rotation fulcrum axis of the reinforcing member are coaxially arranged, and Figure 4A.
is a side view showing another embodiment of the work equipment mounting bracket, FIGS. 4B and 5 are side and rear views showing the same mounting state as above, and FIG. 6 is a side view showing still another embodiment of the mounting bracket. The perspective views and FIGS. 7 to 10 show an example of a structure in which the mounting bracket and the work equipment support are simultaneously fixed by a cam. FIG. 7 is a plan sectional view thereof, FIG. 8 is a side sectional view, and FIG. Figure and 1st
Fig. 0 is a side view and a plan view in use, Fig. 11 is a side cross-sectional view showing a conventional method of fixing the mounting bracket and work equipment support, and Figs. 12 to 15 show still another method of fixing the mounting bracket. 12 is a plan sectional view thereof, FIG. 13 is a side sectional view, and FIGS. 14 and 15 are a side view and a plan view of the device in use. In the figure, 2 is a rotary tiller, 3 is an arm, 6 is a frame for attaching a working machine, 7 is a rotating shaft of the frame, 9 is a single soil cultivator, 11, 11a, 11b, 1
1'b is a mounting bracket, 17 is a reinforcing member, 18
is the pivot axis of the reinforcing member.

Claims (1)

[Scope of utility model registration request] The work equipment mounting frame is connected to the arm fixedly attached to the rotary tilling device via a rotation shaft so as to be able to freely adjust and fix the work equipment up and down. One end is connected to the working machine side, and the other end is attached to the rotary tilling device via a hitch so that it can move up and down, and the reinforcing member is positioned outside the rotation axis of the frame with respect to the arm. A work equipment mounting device for an agricultural tractor, characterized in that a dynamic fulcrum shaft is provided, and the rotation fulcrum shaft of the reinforcing member is positioned on the same line as the rotation axis of the frame.