JPS5813122B2 - Gauge member mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gauge member mounting device, in which a working machine is mounted to the rear of a tractor body via a three-point link mechanism, and a lower link of the three-point link mechanism has a gauge member at its lower end. In the case where the mounting base is supported, the mounting structure of the mounting base is simplified so that the gauge member can be attached and detached by an extremely simple operation, and the tilting of the gauge member caused by the tilting of the lower link with the ball joint as the fulcrum is prevented. It is an object of the present invention to prevent this, and furthermore, to enable the work machine to be stored using the gauge member as a stand after the work machine is removed from the three-point link mechanism.

When plowing a field by attaching a working machine such as a rotary device to the rear of the tractor body via a three-point link mechanism, it is necessary to equip the tractor with a gauge wheel in order to stabilize the plowing depth.

Conventionally, this gauge wheel has been generally placed at the rear of the work equipment, but this has caused problems such as leaving gauge wheel marks in the plowing area and significantly lowering the weight balance when the work equipment is raised. Recently, a lower link of a three-point linkage mechanism has been provided which is placed between the tractor body and the working machine and uses the lower link of the three-point linkage as a strength member that supports the gauge wheel.

However, this conventional mounting device is a fixing method in which the mounting base with the gauge wheel support rod is completely fixed to the lower link by welding or bolts, so when installing a work machine that does not require a gauge wheel. If it is welded, the mounting base will be an obstacle, and if it is a bolted structure,
Operations such as loosening the bolts and removing the mounting base were required, which was a major bottleneck in improving work efficiency.

In addition, since the lower link is pivotally connected to the tractor body and the work equipment through the ball joint, it may be tilted within the range allowed by the ball joint due to the weight of the work equipment, etc. Conventionally, the mounting bases were each independently fixed to the lower link, so when the lower link tilted, the gauge wheel tilted along with it, resulting in a lack of stability.

Furthermore, in the past, the mounting base and the work machine were completely separate, so when the work machine was removed from the three-point linkage mechanism, there was no way to keep it in an upright position, especially with rotary machines, and it would fall back and forth, causing various parts to fall. could have been damaged.

The present invention solves these conventional problems, and
The feature is that a working machine is attached to the rear of the tractor body via a three-point link mechanism, and a mounting base having a gauge member at the lower end is supported on the lower link of the three-point link mechanism. The mounting base is configured to have an open end so that it can be inserted into and removed from the mouth link, and a retaining pin is provided on the open end side so as to be able to be inserted and removed so as to sandwich the lower link,
The mount is pivotally connected to the work machine side by a pivot pin, and a locking mechanism for locking the mount and the work machine is provided at the release point.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
In the figure, 1 is a tractor body, 2 is a driver's seat, 3 is a rear wheel, and 4 is a hydraulic system for lifting and lowering a working machine, which has a pair of left and right lift arms 5.

Reference numeral 6 denotes a top link mounting base, which is provided to protrude largely rearward from the upper end of the tractor body 1.

Reference numeral 7 denotes a rotary machine, which is mainly composed of a rotary machine body 8, a rotary tiller section 9, and a rotary cover 10, as is well known in the art. A pair of support arms 12 provided, a lower link connecting fitting 13 and a mounting bracket 1 symmetrically attached to each support arm 12.
4. Top mast 15 installed on gear case 11
, a support link 16 that reinforces this top mast 15
etc.

The gear case 11 has an input shaft, and this input shaft is connected to a PTO shaft 18 at the rear end of the tractor body 1 via a universal joint shaft 17.
is linked to.

A lateral pivot pin 19 is supported at the front end of the lower link connecting fitting 13, and the lower end of the support link 16 is coupled to the lateral pivot pin 19.

Reference numeral 20 denotes a three-point link mechanism for attaching the lowering device 7 to the rear of the tractor body 1, and is composed of one top link 21 and a pair of left and right lower links 22, and the top link 21 is attached to a top link mounting base. 6 and top mast 1
5, and each lower link 22 has one end pivotally supported on both sides of the lower rear end of the tractor body 1 via a ball joint 23, and the other end connected to a ball joint 24 and a lateral pivot pin 19. It is pivotally connected to the lower link connecting fitting 13 via.

Reference numeral 25 denotes a gauge wheel, and there are a pair of left and right gauge wheels, each of which is pivotally connected to the lower end of a gauge wheel support rod 27 by a support shaft 26, as shown in FIG. 28 so that it can slide vertically,
Further, the vertical position can be adjusted using the adjustment pin 29.

The mounting base 28 has a mounting portion 30 on the outside consisting of two upper and lower plates, and the mounting portion 30 has an opening at the outer end and is configured to be able to be fitted and removed from the lower link 22 from this opening side. There is.

The lower link 2 is attached to the open end side of the mounting portion 30.
A retaining pin 31 is provided so as to be freely inserted and removed so as to hold the lower link 22 irremovably when the lower link 22 is fitted into the lower link 22. Therefore, the mounting base 28 is slidable in the longitudinal direction with respect to the lower link 22.

Reference numeral 32 denotes a connecting link, one end of which is connected to the upper rear side of the mounting base 28 by a pivot pin 33, and the other end is detachably pivotally connected to the mounting bracket 14 of the rotary body 8 by a pivot pin 34. , to prevent the lower link 22 from tilting around the ball joints 23 and 24 as fulcrums.

Reference numeral 35 denotes a regulation link that is pivotally supported by a pivot pin 36 on the rear side of the lower part of the mounting base 28, and a pin hole 3 formed on the free end side of the regulation link.
7 can be freely fitted into and removed from the lateral support pin 19.

Reference numeral 38 denotes a stopper that is integrally attached to the mounting base 28, and has a structure that locks the regulation link 35 when the pin hole 37 of the regulation link 35 is fitted to the lateral support pin 19. With the stopper 38, the mounting base 2
A locking mechanism for locking the locking device T and the locking device T is configured.

It is also possible to remove the gauge wheel 25 from the rotary device 7 configured as described above, and to arrange a gauge wheel 39 behind the rotary tiller 9 as shown by the imaginary line in FIG.

That is, the gauge wheel 39 is provided on both sides of the rear end of the support frame 42 via the stay 40 and the support rod 41, and the support frame 42 has a rectangular shape in plan, and its front end is connected to the pivot pin 3.
4, it is pivotably supported to the mounting bracket 14 in a detachable manner.

43 is an adjustment screw shaft 44 and an adjustment handle 4 for operating it.
5, the upper part of the adjusting screw shaft 44 is rotatably held by a holding fitting 48 of a support member 47 which is removably fixed to the top mast 15 with a mounting pin 46, and the lower part is The screw portion 49 is screwed into the adjustment nut 50 so that it can move forward and backward.

The adjustment nut 50 is rotatable about a horizontal axis on a support metal fitting 51, and the support metal fitting 51 is fixed to the support frame 42 side.

In the above configuration, when tilling a field such as a field, the gauge wheel 25 is placed in front of the rotary tiller section 9 as shown by the solid line so as not to leave gauge wheel marks on the tillage mark. If you want to attach the gauge wheel 25 after attaching the lower control device 7 to the rear via the three-point link mechanism 20, first remove the retaining pin 31, and then insert the attachment part 30 of the attachment base 28 from the inside of the lower link 22. Then, the retaining pin 31 is inserted into the open end side of the mounting portion 30.

Then, the mounting base 28 is supported by the mounting portion 30 and the retaining pin 31 so that it can freely slide only in the longitudinal direction relative to the lower link 22. Next, the mounting base 28 is slid to an appropriate position and pivoted thereto. Connecting link 3 connected by pin 33
2 can be connected to the mounting bracket 14 using the pivot pin 34, and therefore, although the mounting base 28 is removable, it can be handled very easily.

The plowing depth can be easily adjusted by changing the insertion position of the adjustment pin 29, thereby changing the relative position between the mounting base 28 and the gauge wheel support rod 27.

Generally, the lower link 22 may tilt around the ball joint 23.24 as a fulcrum depending on the weight of the low-client device T.
4, the lower link 22 is pivotally connected to the lower link body 8 by the connecting link 32, so that a force that prevents the tilting is applied to the lower link 22 through the connecting link 32. Therefore, the lower link 22 is tilted, and the gauge wheel 25 is unnecessarily moved. Incidents such as tilting can be prevented.

After the tilling work is completed, the rake device 7 is connected to the three-point linkage mechanism 2.
After removing from 0, connect link 3 as shown in Figure 3.
2, the regulation link 3 is pivoted to the lower part of the mounting base 28 while the mounting base 28 and the rotary body 8 are still connected.
The pin hole 37 of No. 5 is fitted into the lateral support pin 19 to connect the mounting base 28 and the low lift body 8 by a link mechanism, and the regulating link 35 is engaged with the stopper 38.

Then, the relative rocking between the mounting base 28 and the rotary machine body 8 is restricted, and the rotary machine 7 can be maintained in an upright position.

In this case, if the low clearance device 7 is inclined forward, the gauge wheel support rod 27 may be lengthened using the adjustment pin 29 as shown in FIG. 3 to stabilize it.

Since the soil in paddy fields is relatively soft, it is necessary to reduce the ground pressure of the gauge wheel in order to obtain a stable plowing depth. Therefore, in such a case, the gauge wheel 25,
It is sufficient to remove the mounting base 28 and the like, and attach the gauge wheel 39 to the rear of the rotary cultivating section 9 as shown by the imaginary line in FIG. 1 in the same manner as in the conventional method.

The regulating link 35 may be configured to be fixed at an appropriate position when not in use, and the locking mechanism may easily have a structure other than the one shown.

As described in detail in the embodiments above, according to the present invention, the mounting base is configured to have an open end so that it can be fitted onto and removed from the lower link, and a retaining pin is provided on the open end side so as to sandwich the lower link. The gauge member can be easily attached to and detached from the lower link, and the mounting bracket is pivotally connected to the work machine side using a pivot pin, so there is no need to attach any special means to the lower link. Movement can be safely regulated.

In addition, since the lower link is generally connected to the tractor body and work equipment via a ball joint, conventionally the lower link could tilt within the allowable range of the ball joint, but according to the present invention, the mounting base can be pivoted as described above. Since it is connected to the working machine by the support pin, the tilting of the lower link and the resulting tilting of the gauge member can be reliably prevented, and stability is significantly improved.

Furthermore, the locking mechanism that locks the mounting base and work equipment is releasable, so if you use this locking mechanism after removing the work equipment from the three-point linkage mechanism, you can use the gauge member as a stand and perform work. The machine can be stored in an upright position.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is an overall side view, FIG. 2 is a partially cutaway front view, and FIG. 3 is a removed view. FIG. 1... Tractor body, 7... Rokuri device, 8... Rokuri body, 12th... Support arm, 13ψ... Lower link connection fitting, 14... Mounting bracket, 19... Lateral pivot pin, 20... Three points Link mechanism, 22...lower link,
23.24...Ball joint, 25.39...Gauge wheel, 27...Gauge wheel support rod, 28...Mounting stand, 3
0...Mounting part, 31...Removal pin, 32...Connection link, 35...Restriction link, 38...Stopper, 42...
...Support frame, 43...Plowing depth adjustment mechanism.

Claims (1)

[Claims] 1. A work machine is attached to the rear of a tractor body via a three-point linkage mechanism, and a mounting base having a gauge member at the lower end is supported by the lower link of the three-point linkage mechanism, with the mounting base being open at one end. The lower link is configured to be able to be fitted in and removed from the lower link, a retaining pin is provided on the open end side of the lower link so that it can be inserted and removed freely so as to sandwich the lower link, the mounting base is pivotally connected to the work machine side by a pivot pin, and A gauge member mounting device characterized in that a locking mechanism for locking a mounting base and a working machine is provided in a release mode.