JPS5851685Y2 - Posture holding device for ground-based work equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a posture holding device for a ground-based work machine, and for example, when an auger-type trenching machine is connected to a tractor with a three-point link, it prevents the trenching machine from floating due to work resistance. In addition, it is an object of the present invention to provide a posture holding device that also functions as a means for adjusting the working depth.

In order to achieve this purpose, the present invention is characterized in that the ground work equipment is connected to the tractor body via a link mechanism so that it can be raised and lowered, and the tractor body has a plurality of retaining sections. A stopper is provided in addition to the link mechanism on a side of the tractor body that moves when going up and down, and the stopper can be freely engaged with and detached from the engagement portion of the engagement body, and The point is that it is engaged in order to restrain movement in the lifting direction that acts on the ground work equipment during work.

Hereinafter, a specific example of the present invention will be described in detail with reference to the drawings. In FIGS. 1 to 3, 1 is a tractor body, 2 is a rear wheel, and the tractor body 1 is made up of a transmission case as a structure, The rear upper surface of the vehicle body 1 has a working machine elevating means including a pair of left and right lift arms 3.

4 is a ground work machine - an auger-type trench excavator as an example, and machine frame 5
It consists of a transmission box 6, and an auger part 7, and is connected to the tractor body 1 so as to be vertically movable via a link mechanism (a three-point link 8 shown as an example) in the figure.

Reference numeral 9 denotes a top link mounting base, which is removably attached to the upper center of the rear surface of the tractor body 1, and protrudes largely rearward.

The three-point link 8 consists of a top link 10 in the center and a pair of lower links 11 on the left and right, and is usually connected to the top link 1.
0 has a turnbuckle structure so that the shaft length can be adjusted freely, and the top link is attached with both ends 10a and 10b pivoted between the base 9 and the top mast of the work equipment frame 5, and is detachable. .

In addition, the left and right pair of lower links 11 are connected at both ends 11a and llb between the lower part of the tractor body 1 and the work equipment frame 5, and each lower link 11 and each lift arm 3 are connected to the lift rod 12. It is connected with.

Reference numeral 13 denotes a power transmission shaft, which is provided with bent portions at intervals in the axial direction, and connects the tractor PTO shaft and the input shaft of the transmission box 6 in an interlocking manner.

For mounting the top link, the base 9 has a pair of left and right plays (9a, 9b) that are approximately trapezoidal in side view shape, each play (9a, 9).
A pivot shaft 14 is installed at the tip between b and the end portion 10a of the top link 10 is pivotally attached to this pivot shaft 14.

Reference numeral 15 denotes an engaging body, and in the figure, the top link is attached to the upper side of each plate 9a, 9b of the stand 9 in a removable manner with bolts, etc., and the retaining body 15 has a plurality of sawtooth-shaped engaging parts 1.
5a is formed.

Reference numeral 16 denotes a stopper, one end of which is pivotally attached to the top link 10 as shown by reference numeral 17, and the other end has a engaged portion 16a extending between the engaging portions 15a of each engaging body 15. The portion 16a can be freely engaged and disengaged from the upper region of the fixed side engaging portion 15a.

That is, when work resistance occurs in the auger part 7 as shown by arrow A in FIG. By locking the top link 10 to the engaging portion 15a of the engaging body 15, the top link 10 is prevented from rotating counterclockwise in FIG. 1 about the pivot 14. be.

In short, the engaging body 15 having a plurality of stages of retaining parts 15a is provided on the tractor body 11 side, and the mechanism 8 is on the side that moves when going up and down with respect to the tractor body 1, which is the link mechanism 8 side in this example. Another stopper 16 is provided, and the stopper 16 is capable of engaging and disengaging from the engaging portion 15a, and is used to restrain movement in the lifting direction acting on the ground work equipment 4 during work. 15a.

Reference numeral 18 denotes a stopper release means, which is installed as a parallel link in the figure between each plate 9a and 9b of the base 9, and the upper part between the front and rear pair of links 19 and 20 is used to pivot the protruding link 21. The link 21 allows the stopper 16 to be pushed up freely, and 22 indicates its operating lever.

That is, when the operating lever 22 is operated in a certain direction to raise the link 21 in parallel, the stopper 16 is pushed up and the engagement position is released.

According to the specific example of the present invention configured as described above, work is started with the relative positional relationship between the tractor body 1 and the ground work equipment 4 set in advance according to the work depth. However, the working depth is determined by the position at which the locked portion 16a of the stopper 16 is engaged with the engaging portion 15a of the engaging body 15.

That is, in the first illustrated example, when the top link is attached, if the angle between the base 9 and the top link 10 becomes small, the stopper 16
If the angle is large, the stopper 16 is engaged and held on the side closer to the tractor body 1 (where the stopper 16 is engaged and held, and the working depth becomes shallower). The depth of work becomes deeper.

In other words, the stopper 16
The working depth of the work implement 4 is adjusted by the position at which the engaged portion 16a is engaged.

If work is started under the target working depth in this way, work resistance A will occur in the auger part 7, which will cause the ground work machine 4 to
However, at this time, the locked portion 16a of the stopper 16 pivotally attached to the top link 10 is locked to the engaging portion 15a of the fixed side engaging body 15. Therefore, the bending of the top link 10 is restrained, and the tractor body 1 receives the working resistance A, thereby ensuring that the tractor maintains its posture.

In addition, when it is necessary to raise or lower the entire working machine during the work or after the work is completed, the release lever 22 is operated in a certain direction and the stopper 16 is moved by the link 21.
If the stopper 16 is released in this way, it will assume the conventional three-point link connection position.

The present invention is carried out as described above, and in short, the present invention is a vehicle in which a ground work machine is connected to a tractor body through a link mechanism so as to be able to rise and fall freely, and a plurality of retaining parts are provided on the tractor body side. Separately from the link mechanism, a stopper is provided on the side of the tractor that moves when going up and down, and the stopper can be freely engaged with and detached from the retaining part of the engagement body, and Since it is characterized in that it is engaged in order to restrain movement in the lifting direction acting on the ground work machine, it has the following advantages.

A stopper that is engaged with the retaining part of the engaging body provided on the vehicle body to restrict movement in the lifting direction that acts on the ground work equipment during work is separate from the link mechanism and is used to prevent lifting and lowering with respect to the tractor. Since it is provided on the side that moves at times, it can be installed without special modification to the link mechanism, and even when it is made to be able to engage and disengage from multiple stages of engagement parts, the retaining part Since it is located on the vehicle body side and the stopper is provided on the side that moves relative to the tractor, the engagement and disengagement positions can be changed easily and accurately.

In addition, the stopper can be freely engaged with and disengaged from the multiple stages of engagement portions of the engagement body provided on the vehicle body, and is secured to reliably absorb and stop the force in the upward direction that acts on the work equipment. The posture of the work equipment can be held reliably and accurately, and the position of engaging and disengaging the stopper with respect to the retaining portion can be selected in multiple stages, and the posture of the work equipment can be maintained appropriately depending on the working depth. .

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show examples of implementation of the present invention, and FIG. 1 is an overall side view;
FIG. 2 is a rear view of the main part, and FIG. 3 is a side sectional view of the main part. 1...Tractor body, 4...Work machine,
7...Auger part, 8...3-point link, 9...Top link installation stand, 10...
...Top link, 11...Lower link, 1
5...Engagement body, 15a...Engagement part, 1
6... Stopper 16 a... Locked part.

Claims (1)

[Scope of utility model registration request] In a vehicle in which a ground work machine is connected to a tractor body via a link mechanism so as to be able to rise and fall freely, an engagement body having a plurality of engagement parts is provided on the tractor body side, and a stopper is attached to the tractor apart from the link mechanism. The stopper is provided on the side that moves during lifting and lowering, and the stopper is capable of engaging and disengaging from the retaining portion of the engaging body, and is engaged to restrain movement in the lifting direction acting on the ground work equipment during work. An attitude holding device for a ground-based work machine, characterized by: