JPS6223905Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a tank mounting structure for a working machine, and uses a top link bracket and a lower link bracket to protect the tank and prevent damage to the tank when it falls over. be.

Some tractor-mounted working machines are equipped with an oil tank on the machine frame side, and the hydraulic oil in the oil tank is taken out to drive various parts. In the case of this type of work equipment, it is necessary to move the center of gravity of the work equipment closer to the tractor body to improve stability during work, so the tank should be installed in the position of the machine frame closest to the tractor body. is desirable. However, if the tank protrudes from the machine frame toward the tractor, there is a risk that the tank will come into contact with other obstacles and be damaged during a turnaround, leading to oil leakage or the like.

The present invention aims to solve the above-mentioned problems, and its features include: A top link bracket and a lower link bracket are provided in vertical positions on the side of the machine frame corresponding to the three-point link mechanism, and a tank for oil or the like is mounted on the machine frame between the top and bottom of these two brackets, and The point is that the amount of protrusion of each bracket from the machine frame is greater than the amount of protrusion of the tank.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. In FIGS. 1 to 3, 1 is a tractor body, and a rear wheel 3 and a fender 4 are attached to both sides of the rear part through a rear axle case 2, etc. There is. Reference numeral 5 denotes a hydraulic system for lifting and lowering the working machine, which is equipped with a pair of left and right lift arms 6 and is mounted on the rear of the tractor body 1. 7 is provided protruding from the rear end of the tractor body 1.
A PTO shaft 8 is a hydraulic pump driven by the PTO shaft 7, and is detachably attached to a top link mount 10 or the like at the rear end of the tractor body 1 via a pump mount 9. Reference numeral 11 denotes a three-point link mechanism, which includes one top link 12 and a pair of left and right lower links 13, each of which is connected to a lift arm 6 via a lift rod 14 so as to be able to swing vertically. An excavator 15 is attached to the rear of the tractor body 1 via the three-point link mechanism 11 so as to be detachable and movable up and down.

The excavator 15 includes a machine frame 16 connected to a three-point linkage mechanism 11, a pair of left and right excavators 17 rotatable around a vertical axis, and a rotation drive unit that drives the excavators 17 around the vertical axis. 18, an elevating frame 19 that supports the excavating section 17 and the driving section 18 so as to be movable up and down with respect to the machine frame 16, and an elevating drive section 20 that moves the elevating frame 19 up and down.

The machine frame 16 has a substantially ladder shape with a pair of left and right guide rails 21 erected in the vertical direction, an upper connecting member 22, intermediate connecting members 23, 24, a lower connecting member 25, etc. that connect the guide rails 21 to each other. 4 and 5 on the lower front side of the machine frame 16.
As shown in the figure, the oil tank 26 is flat in the front and back and horizontally long.
is mounted across each guide rail 21. The oil tank 26 is attached to each guide rail 21 at both ends by a holding member 27 and upper and lower bolts 32, and also functions as a part of the reinforcing member of the machine frame 16. Furthermore, a top link bracket 28 and a lower link bracket 29 are provided on the machine frame 16 and project forward to sandwich the oil tank 26 from above and below.
Top link 1 is attached to each of these brackets 28 and 29.
2 and lower link 13 are removably connected via mounting pins 30 and 31. The top link bracket 28 is provided at the center of the intermediate connecting member 24, and the lower link bracket 29 is provided at each guide rail 21.
is larger than the protrusion amount l.

As shown in FIG. 4, the elevating frame 19 includes a pair of left and right elevating bodies 35 that are movable up and down along each guide rail 21 via a pair of upper and lower guide wheels 33 and 34, and a lateral direction behind the guide rail 21. It comprises an upper support member 38 and a lower support member 39 which are arranged in the vertical direction and are fastened to each elevating body 35 with fasteners 36 and 37 such as U-bolts. Note that the guide wheels 33 and 34 and the support member 3
8 and 39 are arranged so as to correspond to each other at approximately the same height.

As shown in FIG. 4, the lifting drive section 20 is composed of a hydraulic cylinder 40, a fixed sprocket 41, a dynamic sprocket 42, and a chain 43. The hydraulic cylinder 40 is vertically arranged approximately in the center between the guide rails 21 with the piston rod 44 facing downward, and is attached to each connecting member 22, 23 via brackets 45, 46. A fixed sprocket 41 is rotatably connected to the upper end of the piston rod 44, and a dynamic sprocket 42 is rotatably connected to the lower end of the piston rod 44. The chain 43 is hung across both sprockets 41 and 42,
One end is connected to the cylinder 4 via the dynamic sprocket 42.
The other end is connected to a connecting metal fitting 47 at the lower end of the lower end, and the other end is connected to a connecting metal fitting of the lower support member 39 via a fixed sprocket 41. Therefore, the elevating frame 35 can be raised and lowered with a stroke twice that of the hydraulic cylinder 40 by the telescopic operation of the hydraulic cylinder 40.

The excavation section 17 is a pair of left and right excavation sections, each of which comprises a vertical auger shaft 48, a tip excavation tool 49 attached to the lower end of the auger shaft 48, a screw section 50 provided at the lower end of the auger shaft 48 approximately one pitch upward from the vicinity of the tip excavation tool 49, and a screw section 50 provided at the lower end of the auger shaft 48 approximately one pitch upward from the vicinity of the tip excavation tool 49.
Each of the excavation sections 17 is provided with a plurality of soil crushing members 51 and the like which are provided at positions shifted in the circumferential direction and the radial direction.
2 to a mounting flange 54 at the lower end of the intermediate shaft 53. The intermediate shaft 53 is held rotatably about its vertical axis by a bearing device 55 near the upper part of the mounting flange 54, and the bearing device 55 is fixed to a bearing mount 57 fastened to the lower support member 39 by a fastener 56. A marker 58 is provided in front of one of the excavation sections 17. The auger shaft 48 of the excavation section 17 is connected to the excavation tool tip 49 when the lifting frame 19 is raised to the upper limit.
is set to be at approximately the same height as the lower connecting member 25 of the machine frame 16. Therefore, when the excavator 15 is removed from the tractor body 1, the lower connecting member 25
The drill bit 46 can be placed in a state where the drill bit 46 and the tip drilling tool 49 are in contact with the ground.

The rotary drive unit 18 includes a pair of left and right reducers 59 corresponding to each excavation unit 17 and a hydraulic motor 60 for driving the reducers 59. Each reducer 59 has an output shaft 61 that projects downward and connects to the intermediate shaft 53 and the auger shaft. 48 is mounted on a reducer mount 62 above each excavation section 17, and each output shaft 61 thereof is connected to the intermediate shaft 53 via a coupling 63. Each reducer mount 62 is fastened to the rear side of the upper support member 38 by a fastener 64. The hydraulic motor 60 is mounted behind one of the reducers 59 via a motor mounting base 65, and the hydraulic motor 60
The output shaft 66 of the reducer 59 is directly connected to the input shaft 67 of one of the reducers 59, and pulleys 68, 69 and the belt 7
The other speed reducer 5 is
It is interlocked and connected to the input shaft 72 of No. 9. Note that the motor mount 65 is attached to the reducer mount 62.

The hydraulic cylinder 40 and the hydraulic motor 60 are driven by hydraulic oil supplied from the oil tank 26 via the hydraulic pump 8, and the hydraulic oil is supplied to the fender 4.
It is controlled by control valves 73 and 74 mounted above. Note that the hydraulic motor 60 is capable of forward and reverse rotation.

In the above configuration, when excavating a planting bed for root vegetables, for example, first the lifting frame 19 is raised to the upper limit position along the guide rail 21 of the machine frame 16 as shown in FIGS. 1 to 3. This is hydraulic cylinder 4
This is done by a 0 extension operation. That is, when the hydraulic cylinder 40 is extended, the dynamic sprocket 42
As the frame 1 is lowered, the lift frame 1 is lowered via the chain 43.
A force in the pulling direction acts on the lifting frame 9, and the lifting frame 19 rises along the guide rail 21 due to the rolling of the guide wheels 33 and 34. In this case, the lifting frame 21 rises by twice the stroke of the hydraulic cylinder 40, so
The hydraulic cylinder 40 may have a stroke that is half the lifting amount of the lifting frame 21.

Next, the hydraulic motor 60 is rotated in the normal direction to drive the auger shaft 48 of each excavation section 17 in the normal rotation direction via the winding transmission mechanism 70, reduction gear 59, and intermediate shaft 53.
The hydraulic cylinder 40 is contracted and the elevating frame 19 is sequentially lowered along the guide rail 21. Then, the excavating part 17 is lowered together with the elevating frame 19, so after the tip excavating tool 49 touches the ground as shown in FIG. 6, as the screw part 50 rotates, it excavates to a predetermined depth in a substantially vertical direction. be able to. Since the screw portion 50 of the auger shaft 48 is within a range of about one pitch, after the screw portion 50 is completely buried in the soil, there is no earth removal action by the screw portion 50, and therefore, the screw portion 50 The excavation site above is filled with earth clods. Then, as the auger shaft 48 rotates, the soil clod is stirred and crushed by the soil crushing member 51, so that the particle size becomes suitable for planting root vegetables.

When excavating to a predetermined depth, the marker 58 touches the ground and marks the next excavation position, so after that,
The auger shaft 48 may be removed upward by raising the elevating frame 19 while reversing the auger shaft 48.

When removing the excavator 15 from the tractor body 1 after excavation work, first raise the elevating frame 19 to the upper limit and move the tip excavator 49 at the lower end of the excavator 17 to the machine frame 16.
After aligning the excavator 15 with the lower end thereof, the entire excavator 15 is lowered by the hydraulic device 5, the machine frame 16 and the excavator 17 are brought into contact with the ground, and placed in a vertical position. in this case,
The position of the center of gravity of the entire excavator 15 is within the range surrounded by the machine frame 16 and the pair of left and right excavating parts 17,
Since the machine frame 16 and the excavation part 17 function like a kind of stand, there is no need for a separate stand. After the excavation part 15 is placed on the ground in this manner, the top link 12 and lower link 13 are removed from each bracket 30,31.

If the excavator 15 falls forward for some reason when it is parked, there are lower link brackets 29 on both sides below the oil tank 26, and a top link bracket 28 in the upper center. 28 and 29 protrude forward from the oil tank 26, so these brackets 2
8 and 29, the oil tank 26 can be protected, eliminating the risk of damage, deformation, etc. Furthermore, the oil tank 26 can be protected by the brackets 28 and 29 even in cases other than when it falls over.

Guide wheels 33 and 34 of lifting frame 19 and support member 3
Since the vertical position approximately corresponds to 8 and 39,
By effectively utilizing the length of the guide rail 21, the elevating frame 1
9, it is possible to secure a sufficient amount of lifting and lowering, and it is also possible to obtain a sufficient excavation depth.

In the above embodiment, a rear-mounted type is illustrated in which the excavator 15 is mounted to the rear of the tractor body 1 via the three-point linkage mechanism 11, but the three-point linkage mechanism 11
In the case where the tractor is provided at the front of the tractor body 1, it is also possible to make it a front-mounted type.

Only one excavation part 17 may be provided at the center in the horizontal direction, or a pair of excavation parts 17 may be provided on the left and right sides as in the embodiment, and the distance between the two may be adjusted. , both the bearing mounting base 57 and the reducer mounting base 62 are attached to the respective supporting members 38 and 39.
This can be achieved by freely adjusting the position in the lateral direction, but the winding transmission mechanism 71 requires tension adjustment means. In the case of digging a hole, the excavating part 17 has a screw part 50 extending over substantially the entire length of the auger shaft 48.
If a half-split cover is provided behind it, the tractor body 1 can also be used for trench digging work while moving.

The lifting drive unit 20 includes sprockets 41, 42,
Instead of the chain 43, a pulley, wire, etc. may be used, and in addition to using the linear motion of the hydraulic cylinder 40, it is also possible to use a hoisting machine that combines a hydraulic motor, a hoisting drum, etc. be.

The rotation drive unit 18 can also be replaced with an engine or the like instead of the hydraulic motor 60. However, excavation part 1
If 7 is like the embodiment, it is necessary to incorporate a forward/reverse switching device into the power transmission system. The winding transmission mechanism 71 may be a chain other than the illustrated belt.

If the bearing mounting base 57 and the reduction gear mounting base 62 are made detachable from the support members 39, 38, other work equipment can be attached to the support members 38, 39 and used for purposes other than excavation work. can.

The working machine may be something other than an excavator, and the tank 26 is not limited to being used for oil; depending on the working machine, it may also be used for chemical liquid.

In this invention, the tank is attached to the tractor body side of the machine frame, so even though the tank is on the work machine side, the center of gravity can be moved closer to the tractor body side, improving stability during work. improves. In addition, a top link bracket and a lower link bracket are installed above and below the tank to protrude from the machine frame, and the amount of protrusion is made larger than the amount of protrusion of the tank.
These brackets can protect the tank and prevent it from being damaged or deformed due to contact with obstacles.

[Brief description of the drawings]

The drawings illustrate one embodiment of the present invention, in which FIG. 1 is an overall side view, FIG. 2 is a plan view of the same,
Figure 3 is a rear view of the same, Figure 4 is a cutaway side view of the main parts,
5 is a view taken along the line V-V in FIG. 4, and FIG. 6 is a side view showing the working state. DESCRIPTION OF SYMBOLS 1... Tractor body, 11... Three-point linkage mechanism, 15... Excavator, 16... Machine frame, 17... Excavation section, 18... Rotation drive section, 19... Lifting frame, 2
0... Lifting drive unit, 26... Oil tank, 28...
Top link bracket, 29...Lower link bracket, 48...Auger shaft, 49...Tip drilling tool.

Claims (1)

[Scope of utility model registration request] In a tractor-mounted work machine mounted on a tractor body via a three-point link mechanism, a top link bracket and a lower link bracket are provided in vertical positions on the side of the machine frame corresponding to the three-point link mechanism, and A tank mounting structure for a work machine, characterized in that a tank for oil or the like is mounted on the machine frame between the upper and lower brackets, and the amount of protrusion of each bracket from the machine frame is larger than the amount of protrusion of the tank.