JP3717907B2 - Position correcting slide device for towing work machine towed by tractor - Google Patents

Description

The present invention relates to a position correcting slide device such as a cultivator that is pulled by a self-propelled vehicle such as a tractor.

It is necessary to advance work along the center of the row of ridge work machines such as cultivators that are pulled by a tractor. However, on the laterally inclined surface, the cultivator causes a lateral flow and deviates from the center of the row. The position (posture) of the cultivator for this purpose
As shown in FIG. 6, in the conventional slide device, the towed frame 9 ′ on the work machine 3 side is indicated by an arrow with respect to the towed frame 5 ′ on the tractor 2 side. Therefore, there is the following inconvenience.

That is, when a lateral flow occurs in the work machine 3 such as a cultivator, the tractor 2 is in a posture of traveling obliquely while sliding against the slope as shown in FIG. Therefore,
In the conventional correction device that linearly slides laterally along the straight traction frame 5 ′, the cultivator is always pulled obliquely with respect to the crop row 22, and normal operation cannot be performed.

In addition, the conventional correction device has a problem that an excessive force is applied to the engagement balance because the traction frame 5 ′ and the work implement 3 are linear slides with respect to the inclined tractor 2, and it cannot withstand a large traction force.

In addition, instead of a linear slide, it is conceivable to connect the tractor and the work implement with a rotation link and correct with a circular movement slide, but the radius of the rotation link becomes longer.
It was not possible to obtain sufficient circular motion slide space over a short distance.

The object of the present invention is to achieve the position correction slide of the work implement with respect to the tractor by circular motion, thereby holding the work implement at the center of the row with respect to the inclination of the tractor, and not depending on the rotation or rotation axis. The use of circular motion slides.

Another object of the present invention is to provide a correction slide device capable of withstanding a large traction force by firmly slidingly engaging a tractor-side traction frame and a work implement-side traction frame by circular motion.

The present invention relates to a position correcting slide device for a working machine such as a cultivator to be pulled by a self-propelled vehicle such as a tractor, and is convex in the longitudinal direction of a horizontally long frame body connected to the rear of the tractor. A slide engaging member that slides in a circular motion by engaging with the arc guide of the towing side frame on a towing side frame that forms a curved arc-shaped slide guide and a bracket that is fixed to the front lateral frame of the work implement. And a hydraulic cylinder in which one of a cylinder or a cylinder rod is pivotally supported by the towed side frame and the other is pivotally supported by a slide engagement member on the towed side. This is the main feature.

Another object of the present invention is to form the front edge of the traction side frame into an arcuate slide edge parallel to the arc slide guide in the correction slide device described above, and to slide the traction side frame. The joint member consists of an arc slide guide on the pulling side frame and two brackets formed with a plurality of projections that slide-engage with the arc edge, and these two brackets are joined together vertically with the pulling side frame in between. This is achieved by coupling to the towed side frame.

In the above-described correction slide device, it is desirable that the slide engagement member is provided in a pair of left and right on the pulled side frame.

Preferably, the rear edge of the tow side frame and the front edge of the towed side frame are formed on an arc sliding contact surface parallel to the arc slide guide.

In the correction device of the present invention, the tow side frame of the tractor and the towed side frame of the work implement are engaged with the arcuate slide guide curved backward, so that the tractor can run diagonally along the inclined surface. The work machine slides in a circular motion along the arc guide.
Therefore, the work implement attachment is always pulled along the center of the heel.
In addition, since it slides with a circular motion having no rotation axis, a circular motion with a curvature that is not constrained by the rotation radius of the rotation shaft becomes possible.

The towed side frame on the work implement side is connected by two left and right slide engaging members that engage with the arc slide guide and the arc edge of the tow side frame on the tractor side. I can bear it.

Since the front edge of the towed side frame fixed to the work machine moves along the arc surface with respect to the rear edge of the towed side frame connected to the tractor, an excessive force is not applied to the slide engagement member. No play occurs.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows an example of use on a flat ground in which a work machine 3 such as a cultivator is connected to a tractor 2 through a slide correction device 1 of the present invention. The work machine 3 is pulled at right angles to the tractor 2. Thus, the work unit 3 a of the work machine 3 is arranged along the center of the row 22.

The slide correction apparatus 1 according to the present invention includes a traction side frame 5 that is fixedly attached to the rear of the tractor 2 via traction rods 4 and 4, and a lateral support frame 6 of the work machine 3 at the rear part.
A towed side frame 9 having a bracket 7 fixed to the towed side and fixed to slide engaging members 8 and 8 to be engaged with the towed side frame 5, and a hydraulic cylinder rod 10 a at one end of the towed side frame 5. The hydraulic cylinder 10 is supported by a shaft, and the cylinder 10b is supported by the other end side slide engagement member 8 and is suspended between the two members.

Reference numeral 11 denotes a hydraulic cylinder that is pivotally mounted between the tractor 2 and the stay 12 of the work machine 3, and is a hydraulic cylinder that rotates the entire work machine 3 from the working position to the upper non-working position (FIG. 5). reference).

As shown in FIGS. 2 and 3, the traction side frame 5 fixedly attached to the traction rods 4 and 4 of the tractor 2 has a horizontally long frame body 5a which is curved in a convex shape toward the rear. An arcuate slide guide is formed in the longitudinal direction of the frame body 5a.
In the illustrated embodiment, this arc-shaped slide guide is used as an arc-shaped slide groove 5b (arc long hole).
It consists of. However, the guide is not limited to this, and may be a convex guide.
Plates 13 and 13 are fixed with bolts at both ends of the pulling side frame 5, and bolts 14 and 14 connected to the pulling rods 4 and 4 are attached to the inside of the plates 13 and 13.

The towed side frame 9 integrally has brackets 7 and 7 coupled to the work machine 3 at both ends of the frame body 9a, and is slidably engaged with the arc slide groove 5b of the towed side frame 5 on the left and right of the frame body 9a. The slide engaging member 8 to be joined is integrally provided with a bolt or the like.

In the illustrated embodiment, a pair of slide engaging members 8 and 8 are provided on the left and right sides of the frame main body 9a in order to strengthen the engagement with the pulling side frame 5, and an arc slide is used to maintain the strength of the pulling side frame 5. The groove 5b is divided into two.
The slide engaging member 8 integrally has a projection 17 that engages with the arc slide groove 5 b of the pulling side frame 5, and the towed side frame 9 can slide with respect to the pulling side frame 5 in a circular motion by this uneven engagement. Towed.

In the illustrated embodiment, the slide engaging member 8 has two members formed with protrusions 17 that engage with the arc slide groove 5b in order to strengthen the engagement with the pulling side frame 5, and the top and bottom of the pulling side frame 5. It is combined in a block shape so as to hold it.

Further, in the illustrated embodiment, the front edge 5c of the pulling side frame 5 is formed as an arcuate slide curved surface having the same curvature (parallel) as the arc slide groove 5b, and at the tip of the slide engagement member 8 the pulling Concavities and convexities 18 are formed to engage with arcuate slide curved surfaces formed on the front edge 5c of the side frame 5 so as to form a second circular motion slide engaging portion.
Therefore, the tow side frame 5 and the towed side frame 9 are strong by the left and right slide engaging members 8 and 8 that are combined in two upper and lower sides that engage with the arc slide guides at the two locations of the arc slide groove 5b and the front edge 5c. The structure can withstand traction.

The tip of the cylinder rod 10a of the hydraulic cylinder 10 is pivotally supported at one end of the pulling side frame 5 via a bracket 19, and the cylinder 10b is interposed near the end of the pulled side frame 9 on the opposite side via the bracket 20. As the hydraulic cylinder 10 is expanded and contracted by an external hydraulic operation, the towed side frame 9 slides in a circular motion along the arc slide guide with respect to the towing side frame 5. ing.

As shown in the figure, the rear edge 5d of the tow side frame 5 and the front edge 9b of the towed side frame 9 are on an arc surface having the same curvature (parallel) as the arc slide guide (slide groove 5b, front edge 5c). It is desirable to form and thereby obtain a smooth arc-sliding contact without play.

In FIG. 3, reference numeral 21 denotes a plate that is fixed along the longitudinal direction of the pulling side frame 5 and that smoothly slides the slide engagement member.

Next, the operation of the present invention will be described.
In the present invention, the towed side frame 5 coupled to the tractor 2 and the towed side frame 9 coupled to the work implement 3 are connected to each other so as to be capable of circular movement through an arcuate slide guide. Even if the tractor 2 travels obliquely toward the inclined upper surface on the laterally inclined surface of the field, the towed side frame 9 on the work machine 3 side slides to the horizontal position, and the unit 3a of the work machine 3 It will be pulled along the center.

FIG. 5 shows a side view of the work machine 3 to which the correction device 1 of the present invention is attached. A target work attachment (not shown) is attached to and detached from the rear bracket 3b of each unit 3a.

In the case of traction work such as a cultivator towed by a tractor, even if the tractor runs obliquely on an inclined ground, the work implement attachment is pulled along the center of the hoe so that the work can be continued without any trouble.

Explanation of flat ground usage of the correction device of the present invention The perspective view of the slide correction apparatus by this invention FIG. 3 is an exploded view of a slide correction apparatus according to the present invention. Explanation of use of inclined surface of slide correction device according to the present invention The side view of the working machine which attached the slide correction apparatus by this invention Illustration of use with a conventional linear slide correction device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Slide correction apparatus 2 ... Tractor 3 ... Work machine 3a ... Unit 3b ... Rear bracket 4 ... Towing rod 5 ... Towing side frame 5a ... Frame main body 5b ... Slide groove 5c ... Front edge 5d ... Rear edge 6 ... Side support frame DESCRIPTION OF SYMBOLS 7 ... Bracket 8 ... Slide engagement member 9 ... Pulled side frame 9a ... Frame main body 9b ... Front edge 10 ... Hydraulic cylinder 10a ... Cylinder rod 10b ... Cylinder 11 ... Hydraulic cylinder 12 ... Stay 13 ... Plate 14 ... Bolt 17 ... Protrusion 18 ... Concavity and convexity 19 ... Bracket 20 ... Bracket 21 ... Plate 22 ... Row

Claims (4)

In a position-correcting slide device for a work machine such as a cultivator that is pulled by a self-propelled vehicle such as a tractor, a circle curved in a convex shape toward the rear in the longitudinal direction of a horizontally long frame body connected to the rear of the tractor A slide engaging member that engages with the arc guide of the towing side frame and slides in a circular motion is integrally coupled to the towing side frame that forms the arcuate slide guide and the bracket that is fixed to the front horizontal frame of the work machine. And a hydraulic cylinder in which one of a cylinder or a cylinder rod is pivotally supported by the towed side frame and the other is pivotally supported by a slide engagement member on the towed side. Position correction slide device for towing machine The front edge of the tow side frame is formed into an arcuate slide edge parallel to the arc slide guide, and the slide engaging member of the towed side frame is
It consists of an arc slide guide on the towing side frame and two brackets formed with a plurality of convex portions that slide-engage with the arc edge, and these two brackets are joined together vertically by sandwiching the towing side frame. The position correcting slide device for a towing working machine according to claim 1, wherein the sliding device is connected to a side frame. 3. The position correcting slide device for a towing work machine according to claim 1, wherein the slide engaging members are provided on the left and right sides of the to-be-towed side frame. 4. The position correction of a towing work machine according to claim 1, wherein a rear edge of the tow side frame and a front edge of the towed side frame are formed on an arc sliding contact surface parallel to the arc slide guide. Slide device

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