JPH0131642Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a work machine, which has an extremely simple structure and allows the main body of the work machine to be slid and fixed in the horizontal direction on the machine frame.
The purpose is to install it without damaging the sliding surface of the machine frame.

Work machines that are attached to a tractor, such as trench excavators, have a trench excavator body with an auger etc. fixed to a machine frame that is attached to the tractor via left and right support members. The position of the groove was always in a constant relationship to the tractor. In other words, in a tandem type, where the trench digging machine body is located in the lateral center of the tractor, the groove is located in the center between the wheels of the tractor, and in an offset type, where the trench trenching machine body is eccentric to the rear of the tractor wheels, the groove is located in the center between the wheels of the tractor. Therefore, in the past, it was not possible to change the position of the groove in the lateral direction depending on the conditions, and there was a drawback of lack of versatility.

Therefore, as disclosed in Japanese Utility Model Publication No. 57-3366, it is possible to attach a cylindrical mounting base that is slidable laterally to the machine frame via a set piece, and to attach the main body of the work machine via this mounting base. Conceivable.

However, if the machine frame is supported at both ends by the tractor via the left and right members, and the mounting base is cylindrical, the mounting base must be fitted to the machine frame from the end after the left and right members are removed, making the work difficult. It becomes extremely troublesome to install the machine. Further, by interposing a set piece between the mounting base and the machine frame, damage to the sliding surface of the machine frame can be prevented, but there is a risk that the set piece may fall off when the mounting base slides.

The present invention solves the above-mentioned problems, and its feature is that the machine frame 10 is supported at both ends by the tractor 1 via the left and right support members 11.
and the work machine main body 16 attached to this machine frame 10.
In the work machine equipped with the above, a U-shaped mounting base 24 that fits into the machine frame 10 so as to be slidable in the horizontal direction is provided on the work machine main body 16. The member 30 that sandwiches the machine frame 10 with the mounting base 24 is attached with bolts 31, and is inserted between the mounting base 24 and the machine frame 10 from the open end side of the mounting base 24, and the mounting bases are provided at both horizontal ends. 24 is provided, and a bolt 28 for pressing the presser plate 32 against the machine frame 10 is screwed into the mounting base 24.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. In FIGS. 1 to 3, 1 is a tractor;
2 is the rear wheel, and 3 is the driver's seat. Reference numeral 4 denotes a hydraulic system for lifting and lowering the working machine, and has a pair of lift arms 5. 6
is a three-point link mechanism that attaches a trench excavator to the rear of the tractor 1, and includes a top link 7 and a pair of left and right lower links 8, and the lower link 8 is connected to a lift rod 9.
It is connected to the lift arm 5 via. 10
is a machine frame made of a horizontal rectangular cylinder, and has a pair of lower link brackets 11 protruding forward at both ends, and a lower link 8 is connected to the front end of the lower link brackets 11. Of the pair of lower link brackets 11, one of the lower link brackets 11 is bent toward the center in the lateral direction, so that the machine frame 10 is mounted eccentrically to one side in the lateral direction with respect to the tractor 1. There is. A horizontal rod 13 is attached substantially parallel to the machine frame 10 via stays 12 at both ends, and the front end of the horizontal rod 13 is located at the lateral center of the front end side of the pair of lower link brackets 11. A top mast 14 is mounted in this manner, and the front end of the top mast 14 is supported by a lower link bracket 11 via a support link 15. Reference numeral 16 denotes a trench excavator main body, which includes a screw auger 18 and an auger 1 provided below a transmission case 17 so as to be rotatable around a vertical axis.
The auger case 19 surrounds the rear side of the auger case 8 and can discharge soil laterally, a groove shaping plate 20 attached to the rear part of the auger case 19, a soil discharge plate 21, etc. 1 PTO axis 2
2 through a universal joint shaft 23, a transmission mechanism (not shown) in the transmission case 17, etc.
Note that the flexible joint shaft 23 is bendable and expandable.
Reference numeral 24 denotes a mount, which is attached to the rear of the transmission case 17 via a pair of brackets 25. They are fitted and can be slid laterally. The mounting base 24 is formed with a mounting seat 26 whose open end is bent up and down as shown in FIG. 4, and two bolt holes 27 are formed in each of the mounting seats 26.
is formed, and a fixing bolt 2 is installed on the top side.
Two bolt holes 29 into which bolts 8 are screwed are formed. Reference numeral 30 denotes a member that sandwiches the machine frame 10 between the mounting base 24 and bolts 31 that come into contact with each mounting seat 26 of the mounting base 24 from the rear and are screwed into the bolt holes 27 thereof.
It is removably attached to the mounting base 24 by means of the following.
Reference numeral 32 denotes a holding plate, and a pair of retaining portions 33 that engage with the mounting base 24 are bent at both ends. It is inserted and interposed between the two from the rear and is pressed and fixed to the upper surface of the machine frame 10 by bolts 28.

In the trench excavator having the above configuration, during trench excavation work such as a drainage ditch in a field, the auger 18 of the trench excavator main body 16 is rotationally driven by the PTO shaft 22 of the tractor 1 via the universal joint shaft 23, etc. The entire trench excavator is towed and travels by a tractor 1. Then, the auger 18 excavates the soil on the front side, and the excavated soil is sequentially sent upward along the auger case 19 and discharged to the side, so a groove A is created in its wake, and the groove A is Both side walls are shaped by groove shaping plates 20.

When excavating a drainage ditch or the like in a field, it is desirable for operation to position the trench excavator main body 16 at the lateral center of the tractor 1 at locations other than the edge of the bank. It is necessary to position it as close to the edge as possible, such as by positioning it behind one of the rear wheels 2. Therefore, in such a case, the lateral position of the trench excavator main body 16 with respect to the machine frame 10 is adjusted as follows. First, after loosening the bolts 28 to release the pressing and fixing by the holding plate 32, loosen the bolts 31 and remove the member 30, or remove the mounting base 24.
The clamping of the machine frame 10 by this member 30 is loosened and released. As a result, the mounting base 24 can be slid laterally with respect to the machine frame 10, so the mounting base 24 can be slid along the machine frame 10 to position the trench excavator main body 16 at a predetermined position. After that, the bolts 31 are tightened and the machine frame 10 is held between the mounting base 24 and the member 30.
Then, when the bolts 28 are tightened and the press plate 32 is pressed and fixed to the upper surface of the machine frame 10, the trench excavator main body 16 is completely fixed to the machine frame 10.
Therefore, the lateral position of the trench excavator main body 16 can be easily and arbitrarily adjusted, and in particular, since the U-shaped mounting base 24 and the member 30 are used, the structure of the adjustment mechanism for the machine frame 10 can also be adjusted. It's easy. In addition, a holding plate 32 is interposed between the mounting base 24 and the machine frame 10, and this is fixed by pressing it against the machine frame 10 with bolts 28, so that the bolts 28 are brought into direct contact with the machine frame 10. Damage to the machine frame 10 can also be prevented compared to the case where the machine frame 10 is damaged. Note that if the trench excavator main body 16 is located in the center of the tractor 1, work such as repairing a trench once dug can be performed.

The mounting base 24 is open in the front and the transmission case 17 is
It may be attached to the trench excavator main body 16 side.

5 and 6 show comparative examples.
There are various mounting structures for attaching the trench excavator main body 16 to the machine frame 10 so as to be slidably fixed thereto.
A pin 35 is inserted into the mounting base 24 and the machine frame 10 to enable adjustment, and a set bolt 36 that contacts the machine frame 10 is screwed into the mounting base 24.

By doing this, a large number of pin holes 3 can be formed in the machine frame 10.
4, there is a problem in terms of the strength of the machine frame 10, and adjustment is also determined by the pitch of the pin holes 34, making it impossible to perform stepless adjustment. Moreover, the set bolt 36 can be connected directly to the machine frame 1.
0, there is a drawback that damage to the sliding surface on the machine frame 10 side becomes significant. On the other hand, according to the present invention such as the above-mentioned embodiment, all such problems can be solved.

According to the present invention, even if the mounting base for attaching the work equipment body to the machine frame is U-shaped, it will fit into the machine frame, so even if the machine frame is supported at both ends, the left and right support members can be removed. Fitting from the end of the machine frame eliminates the need for fitting, making it easy to attach the work machine.

In addition, the mounting base is fixed by pressing the holding plate with bolts and pressing it against the machine frame, which prevents damage to the sliding surface on the machine frame side, but this holding plate is attached to the mounting stand at both horizontal ends. Since it is equipped with a matching retaining part, the holding plate will not fall off when the mounting base is slid. Moreover, the holding plate is inserted between the mounting stand and the machine frame from the open end side of the mounting base, so after inserting this holding plate from the open end side, attach this member to the mounting stand with bolts. As a result, the holding plate can be easily interposed between the mounting base and the machine frame even though it has the retaining portions at both ends.

[Brief explanation of the drawing]

1 to 4 illustrate one embodiment of the present invention, in which FIG. 1 is a partially cutaway side view, and FIG.
Figure 3 is a partially cutaway plan view, Figure 3 is a rear view, Figure 4 is an exploded perspective view of main parts, Figure 5 is a partially cutaway side view showing a comparative example, and Figure 6 is a partially cutaway rear view of the same. be. 1... Tractor, 6... Three-point linkage mechanism, 10
... Machine frame, 16 ... Grooving machine main body, 24 ... Mounting stand, 30 ... This member, 32 ... Holding plate, 33 ...
Retaining part.

Claims (1)

[Scope of utility model registration request] In a work machine including a machine frame 10 supported at both ends by the tractor 1 via left and right support members 11, and a work machine main body 16 attached to the machine frame 10, the machine frame 10 can be slid laterally with respect to the machine frame 10. A U-shaped mounting base 24 that fits is provided on the work machine main body 16, and a member 30 that sandwiches the machine frame 10 with the mounting base 24 is attached to the open end side of the mounting base 24 with bolts 31. A holding plate 32 is inserted between the mounting base 24 and the machine frame 10 from the open end side of the mounting base 24, and is provided with retaining portions 33 that engage with the mounting base 24 at both horizontal ends. Place the presser plate 32 on the machine frame 1.
A working machine characterized in that a bolt 28 that presses zero is screwed into a mounting base 24.