JPH0352834Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention allows a worker to check the posture of the tip of a working implement such as a front loader or backhoe attached to an agricultural tractor from the driver's seat of the tractor. This relates to a posture confirmation device that can be used.

(Prior Art) A conventional posture confirmation device for a working machine of an agricultural tractor of this type includes a device described in Japanese Utility Model Publication No. 40684/1984.

(Problem to be solved by the invention) In the above-mentioned conventional agricultural tractor work equipment posture confirmation device, the upper end horizontal piece of the shape measuring instrument, which is connected to the tip working device and rotates in the front and back direction of the machine, is attached to the machine. It faces in the front-rear direction, that is, in the direction the operator sees from the tractor driver's seat.

Then, from the driver's seat of the tractor, the worker checks whether the top horizontal piece of the tip measuring tool is parallel to the ground and determines whether the bottom of the cutting tool is parallel to the ground. The work should be done while checking.

Therefore, when the worker views the upper end horizontal piece of the cross-section measuring instrument from the direction of its axis, which is facing the direction that the worker looks from the driver's seat of the tractor, and the operator rotates the cross-section measurement instrument gently in the front and rear directions. It is difficult to check whether the upper end horizontal piece of the eye measuring tool is parallel to the ground, and the worker is very tired looking at the eye measuring tool. There are problems in that it is difficult to perform the work properly.

(Means for solving the problem) Therefore, this invention has the following features: (1) When the tip working implement is in the required position, the measuring rod moves up and down, and the operator can easily see it from the tractor driver's seat. It is easy to check the posture of the tip working tool.

(2) In addition, even if the length of the dump cylinder when the tip tool touches the ground changes by alternately replacing it with a bucket, maniac fork, pallet fork, hay fork, etc. depending on the work, the tip tool will always be the same. You can easily check the posture of the person.

In order to solve the above problem, a tip working device 2 is removably pivoted to the tip of the lift arm 1, and a dump link whose lower end is pivoted to the tip side of the intermediate portion of the lift arm 1. Both ends of the connecting rod 4 are pivotally connected to the upper part of the lift arm 1 and the upper part of the tip working device 2, respectively, and the base side of the intermediate part of the lift arm 1 and the dump link 3 are connected to each other.
In a working machine B of an agricultural tractor A with a dump cylinder 5 interposed therebetween, the base of a measuring rod 7 having a bulging portion 6 on the tip side of the intermediate portion is pivotally attached to the dump link 3, and the lift A receiver 8 is attached to the base side of the middle part of the arm 1, and the middle part of the measuring rod 7 is fitted and placed on the receiver 8, and the bulge 6 of the measuring rod 7 and the receiver 8 are placed relative to each other. Make the positional relationship adjustable.

(Function) When lowering the lift arm 1 and placing the tip working device 2 on the ground, in order to make the bottom surface of the tip working device 2 parallel to the ground or tilted forward at a required angle of about 5°, the tip working device 2 must be Their relative positional relationship is adjusted so that the bulge 6 of the measuring stick 7 faces the receiver 8 when the device 2 reaches the above-mentioned required state.

By doing so, when the tip working device 2 is lowered by the lift arm 1 to touch the ground, when the tip working device 2 is rotated in the vertical direction by the dump cylinder 5, the measuring stick 7 will move in the front and back direction accordingly. , when the tip of the measuring rod 7 moves up and down in response to the bulge 6 of the measuring rod 7 corresponding to the receiver 8, the tip of the measuring rod 7 moves up and down.
When the rotation of the tip tool 2 is stopped and the tip working device 2 is lowered,
The tip working device 2 touches the ground in a desired state parallel to the ground or tilted forward at a desired angle.

(Embodiment) The structure of the first embodiment of this invention shown in FIGS. 1 to 3 will be described. A indicates an agricultural tractor, 9 indicates a driver's seat thereof, and 10 indicates a work equipment mounting base.

B shows a front loader working machine to be attached to tractor A, 1 is a lift arm on both sides of working machine B, whose base end is pivoted to the upper part of a mounting bracket 11 with a pin 12, and the base side of the intermediate part and the mounting bracket are A lift cylinder 13 is interposed between the lower parts of the lift arms 11 and the mounting bracket 11 is removably fixed to the mounting base 10.
5, the tip working device 2 of the bucket type is removably attached to the tip working device holder 14 which is pivoted so as to be movable up and down. Reference numeral 3 denotes a dump link whose lower end is pivoted by a pin 17 to a support 16 on the front end side of the middle part of the lift arm 1, and both ends of the connecting rod 4 are connected to the upper part of the dump link and the upper part of the tip work device holder 14, respectively. pivot. Reference numeral 18 denotes a support fixed on the base side of the intermediate part of the lift arm 1, and pins 1 are connected to both ends of the dump cylinder 5 between the upper part of the support 18 and the intermediate part of the dump link 3.
Pivotally connected by 9 and 20.

a indicates the posture confirmation tool of the tip working tool 2, 7 is its measuring stick, and on the tip side of the middle part of the measuring stick 7,
It is bent upward into an inverted U-shape to provide a bulging portion 6, and several adjustment holes 21 are arranged in parallel at appropriate intervals at the base. Reference numeral 8 denotes an eye bolt receiver, which is screwed into the screw hole 22 of the pin 19. Reference numeral 23 denotes a mounting piece, whose upper part is pivotally connected to the pin 20 with a bolt 24, and whose lower part has a through hole 25 extending in the front-rear direction and a pin hole 26 perpendicular thereto. Therefore, after fitting the intermediate part of the measuring rod 7 into the receiving tool 8 and slidably fitting the base into the through hole 25 of the mounting piece 23, the pin 27 is inserted between the pin hole 26 of the mounting piece 23 and the measuring rod 7. They are fixed by being removably inserted into the adjustment hole 21 as appropriate. Although not shown, the dump cylinder 5 and the lift cylinder 13 are each connected to a pressure oil generator of the tractor A through a hose provided with a switching valve.

Next, its effect will be explained. When scooping earth, sand, compost, etc. with the tip working device 2 in a state where the bottom surface of the tip working device 2 is parallel to the ground as shown by the solid line in FIG. 1, the tip working device 2 is grounded in the above state. Next, the pin 27 is removed, the measuring stick 7 is moved back and forth, and the bulging part 6 of the measuring stick 7 is fitted into the receiver 8 as shown in FIG. It is inserted into the hole 26 and the adjusting hole 21 of the measuring rod 7 as appropriate.

When the work is carried out there, as shown by the chain line in FIG.
3 and lower the lift arm 1 using the pin 12 as a fulcrum, while shortening the dump cylinder 5 and rotating the tip working device 2 counterclockwise in FIG. When the robot is lowered to touch the ground, the dump link 3 rotates counterclockwise about the pin 17 as the dump cylinder 5 shortens, and the measuring rod 7 slides on the receiver 8 and moves backward.

Therefore, as shown by the solid line in FIG. 2, when the protruding portion 6 of the measuring rod 7 is fitted into the receiver 8, the tip of the measuring rod 7 descends, and the operator can see this and move the dump cylinder 5. When the operation of is stopped and the lift arm 1 is lowered in that state to ground the tip working device 2,
The tip working device 2 is grounded with its bottom surface parallel to the ground as shown by the solid line in FIG.

On the other hand, when scooping soil, compost, etc. with the tip working device 2 by placing the tip working device 2 on the ground with its bottom surface tilted forward at a required angle of about 5 degrees with the ground, the tip working device 2 is ground to the state of Next, operate the pin 27 and the measuring rod 7 in the same manner as above, fit the bulging part 6 of the measuring rod 7 into the receiver 8, fix the measuring rod 7 to the mounting piece 23, and operate in the same manner as above. For example, the tip working device 2 touches the ground with its bottom surface tilted forward at a predetermined angle with the ground.

In addition, in order to perform other work, the tip working device 2
Even if a maniac fork, pallet fork, hay fork, etc. is installed in place of the bucket mentioned above, the distance between 19 and 20 will change when the bottom of the tip working device 2 is brought into contact with the ground in the required condition. However, when the tip working tool 2 is always in the above state by inserting and removing the pin 27 and moving the measuring rod 7 back and forth, the position is adjusted so that the bulging part 6 of the measuring rod 7 fits into the receiver 8. Adjustment of confirmation tool a works in the same manner as described above.

To explain the structure of the second embodiment of this invention shown in Figs. 4 and 5, 7 ₁ is a measuring rod of the posture confirmation tool a, and a waveform is formed upward on the tip side of the middle part. The corrugated rod 28 is curved to form two bulging portions 6a and 6b, and the center portion of the corrugated rod 28 is fixed on the base with a stopper 29. Reference numeral 8 denotes an eye bolt receiver, which is screwed into a screw hole in the middle part of the receiver 18. 30
is a circumferential groove formed in the protruding portion of the pin 20. Then, the middle part of the measuring rod ₇₁ is fitted into the receiving tool 8,
The measuring rod 7 ₁ is fitted into the circumferential groove 30 in the appropriate recess of the corrugated rod 28 and the measuring rod 7 ₁ is attached to the pin 20 by sandwiching the pin 20 between them. Other symbols indicate the same parts as in FIGS. 1 to 3.

Also in this structure, when the bottom surface of the tip working device 2 is in contact with the ground in the required state, the bulge 6a of the measuring rod ₇₁ is fitted into the receiver 8 as shown in FIG. If the measuring rod ₇₁ is moved back and forth to fit the recessed portion of the corrugated rod 28 into the pin 20, the same effect as described above is achieved.

In addition, if the distance between the bulges 6a and 6ro of the measuring stick ₇₁ is set to an appropriate size, when the bulges 6a are fitted into the receiver 8, the bottom of the tip working tool 2 will be on the ground. The bulge 6ro is parallel to the receiver 8.
When fitted, the tip working device 2 can be configured so that its bottom surface contacts the ground in a state of being tilted forward by, for example, about 5 degrees.

On the other hand, if the protrusions 6a and 6ro of the measuring stick ₇₁ are colored in different colors, the workers can easily see the protrusions 6a and 6ro and there is no possibility of making a mistake.

To explain the structure of the third embodiment of this invention shown in FIG. 6, reference numeral ₂₃₁ is a mounting cylinder for the posture confirmation tool a, the base of which is pivotally connected to the pin 20 with a bolt 24, and the tip of the peripheral wall is screwed. Thread the bolt 32 with the knob 31 into the hole. Then, the base of a measuring rod 7 ₁ similar to that of the second embodiment is slidably fitted into the mounting tube 23 ₁ and fixed by tightening with bolts 32 .

Even in this structure, by operating the bolt 32 with the knob 31, the measuring rod ₇₁ can be moved back and forth arbitrarily, and the relative positional relationship between the bulges 6a and 6ro and the receiver 8 can be adjusted steplessly. Since it can be adjusted to , it works in the same way as above.

To explain the structure of the fourth embodiment of this invention shown in FIGS. 7 and 8, 7 ₂ is a measuring rod of the attitude checking tool a, which is formed straight and its base is connected to the dump link 3 by a bolt 24. Pivotally attached to the middle part of. Reference numeral 33 designates a bulging piece, in which two bulging portions 6 ₂ having a chevron-shaped cross section are arranged side by side on the outer periphery of one end of the cylindrical body, a circumferential groove 34 is formed between them, and a knob 3 is inserted into a screw hole at the other end of the circumferential wall.
1 screw the bolt 32. And bulging piece 3
One end of the bulging piece 33 faces forward, and the protruding piece 33 is slidably fitted onto the measuring rod 7 ₂ , and is tightened and fixed to the measuring rod 7 ₂ with a bolt 32 .

In this structure as well, the bolt 32 is operated by the knob 31, and the protruding piece 33 is aligned with the measuring rod 7 ₂
By moving it arbitrarily along , the relative positional relationship between the bulging portion 6 ₂ and the receiver 8 can be adjusted steplessly, so that the same effect as described above is achieved.

The structure of the fifth embodiment of this invention shown in FIGS. 9 to 12 will be explained. 33 ₂ is a protruding piece that is slidably fitted into the measuring rod 7 ₂ of the posture confirmation tool a, and the cylindrical A bulge with a chevron-shaped cross section on the outer periphery of the middle part of the body 6 ₂
A male piece 35 having a male thread formed on the outer periphery of one side.
A female piece 37 is formed with a protruding part ₆₂ having a chevron-shaped cross section on the outer periphery of the middle part of the cylinder, and a female thread is provided on the inner periphery of the recessed part 36 on the other side. The male thread of the male piece 35 and the female thread of the female piece 37 are screwed together to form a bulging piece 33 ₂ in which a circumferential groove 34 is formed on the outside of the intermediate portion.

Even with this structure, if the male piece ₃₅ and female piece 37 of the bulging piece 33 ₂ are loosened as shown in FIG. Since the protruding piece 33 ₂ is fitted to the measuring rod 7 ₂ , the protruding piece 33 ₂ is then arbitrarily moved along the measuring rod 7 ₂ to connect the protruding portion 6 ₂ and the receiver 8 .
Set the relative positional relationship as required.

Therefore, when the male piece 35 and female piece 37 of the bulging piece ₃₃₂ are screwed together as shown in FIG.
protrudes inward and presses against the measuring rod 7 ₂ to form a bulging portion 33 ₂
is fixed to the measuring stick ₇₂ , so it works in the same way as above.

To explain the structure of the sixth embodiment of this invention shown in FIGS. 13 and 14, 7 ₃ is a measuring stick of the attitude checking tool a, and the middle part of the measuring stick is placed above and below at appropriate intervals. U-shaped bulges 6a and 6b facing in opposite directions are provided, and the base is connected to the dump link 3.
It is pivotally attached to the middle part of the body by a bolt 24. 8 ₃ is a receiver with a ring 39 formed at the lower part and a through hole 40 at the upper part.
The bolt 32 with the knob 31 is inserted into the through hole 40 and screwed into the screw hole 22 ₃ in the middle of the receiver 18 to tighten and fix the receiver 8 ₃ to the receiver 18 .

In this structure as well, the bolt 32 is operated by the knob 31, and the receiver ₈₃ is inserted into the bolt 32.
When the measuring rod 7 is rotated in the front and back direction using the fulcrum as a fulcrum,
Since the relative positional relationship between the bulging portions _6a and 6ro of ₃ and the ring 39 of the receiver 83 can be adjusted steplessly, the same effect as described above is achieved.

In addition, as in the second and third embodiments, if the distance between the bulging portions 6a and 6ro of the measuring rod ₇₃ is set to an appropriate dimension, the bulging portion 6a will be as shown in FIG. When it passes through the receiver ₈₃ and reaches the front, the tip working device 2 touches the ground with its bottom parallel to the ground,
When the bulging portion 6b is fitted into the receiver ₈₃ , the tip working device 2 can be made to touch the ground with its bottom surface tilted forward by, for example, about 5 degrees.

To explain the structure of the seventh embodiment of this invention shown in Figs. 15 and 16, 7 ₄ is a measuring stick of the attitude checking tool a, and on the tip side of the middle part, there is a measuring stick with which it is pointed upward. It is bent into an inverted U-shape and has a bulging portion 6, and the base is formed into a ring and is pivotally connected to a pin 20 by a bolt 24 inserted into the ring.

Reference numeral ₈₄ indicates a receiver, and 41 is a receiver of the receiver ₈₄ , which is formed into a square shape and its vertical piece is fixed to the receiver 18 with a bolt 42, and the horizontal piece has an elongated hole 43 in the front and back direction.
will be established. Reference _{numeral 394} denotes an eye bolt, which is fitted into the middle part of the measuring rod ₇₄ , inserts the base end screw 44 into the elongated hole 43, and attaches a butterfly nut 45 to the upper protrusion of the screw 44.
Screw on the eye bolt ₃₉₄ and tighten it to the pedestal 41.

Even in this structure, when the nut 45 of the receiver ₈₄ is operated and the eye bolt ₃₉₄ is moved along the elongated hole 43, the bulge 6 of the measuring rod ₇₄ and the eye bolt ₃₉₄ of the receiver ₈₄ are connected. Since the relative positional relationship between the two can be adjusted steplessly, the same effect as described above is achieved.

In addition, this invention can be used in the same manner as described above to check the posture of a working machine attached to a three-point hitch of a tractor or a tip working device such as a backhoe, or to mark the rising height of a lift arm.

(Effects of the invention) The apparatus for checking the posture of a working machine for an agricultural tractor of this invention has the following remarkable effects.

(1) The measuring stick that moves back and forth in conjunction with the tip working device is provided with a bulge, and the middle part of the measuring stick is fitted and placed on the receiver, so that the measuring stick can move forward and backward while the tip working device is rotating. When the bulge passes through the receiver, the measuring stick moves up and down. Therefore, (a) the operator can watch the vertical movement of the tip of the measuring stick from the driver's seat of the tractor and check whether the bottom of the tip working device is in the required condition with the ground. , it is easy to check the above posture using a measuring stick.

(b) The work can be done easily and the worker is less fatigued even when working for long hours.

(c) The bottom of the tip working device is always in contact with the ground in a predetermined condition, allowing work to be carried out smoothly and well, improving work efficiency.

(2) The relative positional relationship between the protruding part of the sighting stick and the holding part of the sighting stick can be adjusted. Even if the posture of the tip working tool is set as desired, such as touching the ground in a forward-leaning state of approximately For example, the relative positional relationship can be set to always correspond to the attitude of the tip working tool.

(b) Even if the tip working device is alternately replaced with a bucket, maniac fork, pallet fork, hay fork, etc., the relative positional relationship between the protruding part of the measuring stick and the receiving part of the measuring stick should be adjusted accordingly. , the relative positional relationship can be set in accordance with the type of the tip working tool, which provides great versatility.

(3) The measuring rod is located on the middle part of the work equipment and moves back and forth along it. Therefore, (a) the tip of the measuring rod that moves up and down is located at the rear of the working machine, so the tip is close to the driver's seat of the tractor and can be easily seen by the operator from the driver's seat of the tractor.

(b) Since there is no risk of the measuring rod hitting the pile to be scooped or the ceiling of the building, damage to the measuring rod can be prevented and work can be carried out with peace of mind.

(c) It is not necessary to remove the measuring stick when transporting the work equipment.

(4) When changing the tip working device depending on the type of work, there is no need to attach or remove the measuring stick, just adjust the relative positional relationship between the protruding part of the measuring stick and the receiving part of the measuring stick. The tip working device can be replaced easily and quickly, making it convenient to handle.

(5) It has a simple structure, can be manufactured easily and inexpensively, and its operation is smooth and accurate.

(6) Measuring sticks can be used as accessories for working machines, and can be made into desired shapes and lengths, making them useful in practice.

[Brief explanation of the drawing]

Fig. 1 is a side view of a front loader working machine according to the first embodiment of this invention attached to an agricultural tractor, Fig. 2 is an enlarged side view of the posture confirmation section of the working machine, and Fig. 3 is an exploded view. 4 is a side view of the posture confirmation part of the working machine according to the second embodiment of this invention, FIG. 5 is an exploded slope view, and FIG. 6 is a side view of the working machine according to the third embodiment of this invention. A side view of the posture confirmation section.
A portion is shown cut away. FIG. 7 is a side view, partially cut away, of a posture checking section of a working machine according to a fourth embodiment of the present invention. Fig. 8 is an exploded perspective view of the intermediate receiving part, Fig. 9 is a side view of the posture confirmation part of the working machine according to the fifth embodiment of this invention, and Fig. 10 is an exploded perspective view of the intermediate receiving part. Figures 11 and 12 are side sectional views illustrating the operation of the expansion piece. Figure 11 shows the expansion piece fixed to the measuring rod, and Figure 12 shows the expansion piece and the measuring rod unfixed. show. 13th
The figure is a side view of the posture confirmation part of a working implement according to the sixth embodiment of this invention, FIG. 14 is an exploded perspective view of the intermediate receiving part thereof, and FIG. FIG. 16 is a side view of the posture confirmation section, and FIG. 16 is a slope view. A...Agricultural tractor, B...Work equipment, a...Position confirmation tool, 1...Lift arm, 2...Tip working device, 3...Dump link, 4...Running rod, 5...Dump cylinder, 6...bulge, 7... measuring stick, 8
...Receiver, 15...Shaft, 17...Pin.

Claims (1)

[Scope of utility model registration request] A tip working device is removably pivoted to the tip of the lift arm, and both ends of a link are connected to the top of a dump link whose lower end is pivoted to the tip side of the intermediate portion of the lift arm and the top of the tip working device. In a work machine for an agricultural tractor in which a dump cylinder is interposed between the base side of the middle part of the lift arm and the dump link, the dump link has a bulge on the front end side of the middle part. Pivotally attach the base of the measuring rod equipped with
A receiver is attached to the base side of the intermediate portion of the lift arm, and the intermediate portion of the measuring rod is fitted and placed on the receiver, and the relative positional relationship between the bulge of the measuring rod and the receiver is determined. Adjustable posture confirmation device.