JPH0141801Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a support frame connection device for a muzzleloading work machine.

(Prior art) For example, in a front loader, a pair of left and right mounting bases fixed on both sides of the tractor body are equipped with
Each support frame is detachably installed, and the base end portions of both a lift arm and a lift cylinder for raising and lowering the lift arm are pivotally supported on each support frame,
The upper ends of both support frames are removably connected by a connecting body passing above the bonnet of the tractor.

By the way, the spacing between both mounting members of front loaders differs depending on the model, but conventionally, the connecting body is composed of a single member,
It was not possible to deal with wide and narrow intervals between both support frames.

(Problem that the invention aims to solve) For this reason, in the past, the coupling body was not versatile and was a special product manufactured for each model of front loader, which caused the problem of high manufacturing costs. Ta.

SUMMARY OF THE INVENTION An object of the present invention is to provide a connecting device for a support frame of a muzzleloading work machine, which can provide versatility to the connecting body and reduce the manufacturing cost of the connecting body.

(Means for Solving the Problems) In order to achieve the above object, the feature of the present invention is to connect the connecting body 55 to a pair of left and right side members 56, 57 attached to the upper part of each support frame 22.
, a fastening mechanism 59 that is interposed between both side members 56 and 57 and fastens and integrates both side members 56 and 57 so that they can move forward and backward in the left-right direction;
57 and an adjustment intervening body 58 that is interposed between the side members 56 and 57 to fill the gap between the side members 56 and 57.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In Fig. 1, 1 is an agricultural tractor, which includes an engine 2, a transmission case 3, and a front axle frame 4.
The engine 2 is covered with a bonnet 6, and a front wheel 7 is supported by a front axle frame 4 via a front axle (not shown).
8 is a muffler that projects upward from inside the bonnet 6. 9 is a steering wheel, 10 is a seat, 11 is a rear wheel, and 12 is a rear wheel fender.

Reference numeral 14 denotes a guard frame which is erected on both the left and right rear wheel fenders 12, and its canopy part 15 is located at the rear of the bonnet 6 and above the seat 10.

Reference numeral 17 denotes a front loader, which is an example of a muzzle-mounted working machine mounted on the tractor 1, in which a bucket 18 (tip working tool) is pivoted at the tips of a pair of left and right lift arms 19, and a bucket cylinder 20 is capable of tilting. The base end of the lift arm 19 is pivotally supported on the upper part of a support frame 22 via a pin 21, and is made vertically swingable by a lift cylinder 23 pivotally supported on the lower part of this support frame 22. .

As shown in FIGS. 1, 3, and 4, a brace 25 is provided to protrude forward from the lower part of the support frame 22, and a pair of left and right side plates 26 are provided on the lower surfaces of the support frame 22 and the brace 25. is provided below, and a rear joining pin 27 is provided between the center portions of both side plates 26. A recessed portion 28 recessed downward is formed at the rear portion of the upper portion of both side plates 26 .

29 is a pair of left and right bases, and the transmission case 3
It extends outward from both sides of the abdomen. Base 29
The upper front part is provided with an arrow-shaped part 30 which is located between the side plates 26 and has a shape seen from the arrow on the side, and a rear joining pin 27 is removably engaged with the rear part of the upper surface of the arrow-shaped part 30. A locking recess 31 is formed, and a claw portion 32 that projects upward is formed behind the locking recess 31 in the left base 29.

A connecting frame 33 is provided on the upper side of the tip of the brace 25 to connect the left and right sides across the bonnet 6.
A stand 34 is integrally provided on the lower side and projects downward.
are connected via.

Reference numeral 38 denotes a control device for controlling the lift cylinder 23 and bucket cylinder 20, and as shown in FIGS. have,
The mounting plate 39 is fixed to the right side support frame 22 via a mounting plate 40.

Reference numeral 41 denotes a control valve case fixed to the lower part of the inner surface of the mounting plate 39. A lift cylinder control valve 42 is provided in the rear part of the case 49, and a bucket cylinder control valve 43 is provided in the front part of the case 49. The control valves 42 and 43 are provided with backwardly inclined spools 44 and 45 that project upward from the case 41.

Reference numeral 46 denotes a substantially U-shaped swinging member, which is disposed on the inner side of the upper part of the mounting plate 39 and is pivotally supported on the mounting plate 39 via a support shaft 47 in the left-right direction. The swinging member 46 is provided with a pivot 48 that is orthogonal to the support shaft 47, and a boss 49 is rotatably fitted onto the pivot 48. An operating lever 50 extends rearward and diagonally upward from the boss 49, and an engaging protrusion 51 protrudes inwardly, and the protrusion 51 is connected to the spool 45 via a ball joint 52.

Further, the rear part of the swinging member 46 is pivotally connected to the upper part of the interlocking member 53, and the lower part of the interlocking member 53 is pivotally connected to the spool 44.

Therefore, by rotating the operating lever 50 in the front-back direction around the support shaft 47, the swinging member 46,
The spool 44 moves up and down via the interlocking member 53, and thereby the lift cylinder 23 can be controlled by the lift cylinder control valve 42.

Further, by rotating the operating lever 50 in the left and right directions around the pivot shaft 48, the spool 45 moves up and down via the engagement protrusion 51, whereby the bucketed cylinder control valve 43 causes the bucketed cylinder 20 to move up and down. can be controlled.

To remove the front loader 17 configured as described above from the tractor 1, first apply the parking brake of the tractor 1, shorten the lift cylinder 23, and raise the front wheels 7 slightly while keeping the bucket 18 on the ground. When the front joining pin 36 is removed and the lift cylinder 23 is extended, the front wheel 7 will touch the ground, and then the stand 34 will also touch the ground.
When the lift cylinder 23 is further extended, the rear joining pin 27 is disengaged upward from the locking recess 31. In this state, the front loader 17 can stand on its own, and the tractor 1 can move independently relative to the front loader 17.

Such a front loader 17 is provided with the connecting frame 33 and a connecting body 55 in order to give the lift arm 19 lateral rigidity. In particular, the connecting body 55 prevents the base ends of the pair of left and right lift arms 19 from expanding.

As shown in FIG. 7, the connecting body 55 connects the upper portions of both support frames 22 above the bonnet 6, is located behind the muffler 8, and is connected to a pair of left and right side members 56, 57 and an adjusting intervention. It consists of a body 58, a fastening mechanism 59, and the like.

Each side member 56, 57 is detachably attached to the rear surface of each support frame 22, and the left side member 56 includes a mounting plate 60, a cylindrical body 61, and a triangular prism member 6.
It consists of 2. The mounting plate 60 includes a vertically installed vertically installed portion 63 and upper and lower projecting portions 64 and 65 that project inwardly from the upper and lower ends of the vertically installed portion 63. Between the lower edge of the upper protruding part 64 and the inner edge of the vertical part 63, a mounting hole 66 that opens downward is formed to penetrate in the front-rear direction.
The left side member 56 is attached to the left side support frame 22 by the attachment hole 66 being removably engaged from above with an engaging body 67 that projects rearward from the rear surface of the upper end of the left side support frame 22. Engagement body 6
7 is a shaft portion 68 protruding from the support frame 22;
and a dish-shaped retaining portion 6 fixed to the tip of the shaft portion 68.
9, and a mounting hole 66 is engaged with the shaft portion 68. The cylindrical body 61 projects from the rear surface of the upper protrusion 64 and is located above the bonnet 6. The triangular prism member 62 closes the outer opening of the cylindrical body 61 and is fixed to the rear surface of the upper protruding part 64 and the vertical part 63. The vertical part 63 is the left side support frame 22
The lower protrusion 65 is inserted along the rear surface and is removably inserted into the recess 28, and is engaged with the claw 33 of the base 29 at the front thereof.

The right side member 57 consists of a mounting plate 71 and a cylindrical body 72. A mounting hole 73 that opens downward is formed in the mounting plate 71 and penetrates in the front-rear direction.
However, the right side member 57 is attached to the right side support frame 22 by being engaged from above with an engaging body 67 fixedly provided on the rear surface of the right side support frame 22 . The cylindrical body 72 is horizontally disposed on the rear surface of the upper part of the mounting plate and largely protrudes inwardly, and is located above the bonnet 6, with its inner end meeting the inner end of the cylindrical body 61 of the left side member 56 and are opposite to each other in the left and right direction.

The fastening mechanism 59 fastens and integrates both side members 56 and 57 so that they can move forward and backward in the left and right direction,
It consists of a fixed shaft 75, a screw shaft 76, a nut 77, and an operating body 78 shown as a lever. Fixed shaft 75
is inserted and fixed to the inner end of the cylinder of the right side member 57 as a leftward protrusion, and its left end is attached to the left side member 5.
It is inserted into the cylindrical body 6 of No. 6 so as to be movable in the left and right direction and to be detachable. The screw shaft 76 is fixed to the fixed shaft 75 and extends to the left side, and extends outward through the cylindrical body 61 of the left side member 56, the triangular prism member 62, and the boss 79 fixed to the outer surface of the triangular prism member 62. I'm forced to come out. A nut 77 is screwed to the screw shaft 76 on the outer side of the boss 79 so as to be movable forward and backward, and an operating body 78 is fixed to the nut 77. The operating body 78 is located on the outside of the left side support frame 22 and the bonnet 6, so that it can be easily operated without being obstructed by these.

A collar is used as the adjustment interposition body 58,
Both cylindrical bodies 6 are removably fitted to the fixed shaft 75.
It is inserted between 1 and 72 to fill the gap between them.

Then, as the nut 77 is rotated by the operating body 78, the both side members 56 and 57 are brought closer to each other via the screw shaft 76 and the fixed shaft 75.
6 and 57 are fastened and integrated via an adjustment intervening body 58.

When attaching the coupling body 55, the coupling body 55 is approached from the left side of the tractor 1 with the fastening mechanism 59 loosening the fastening of the both side members 56 and 67, and the respective mounting holes 66 and 73 are After locating the lower protruding portion 65 above the engaging body 67 and above the recessed portion 28, the connecting body 55 is lowered and the mounting holes 66, 73 are engaged with the respective engaging bodies 67. , the lower protruding portion 65 is inserted into the recessed portion 28, and the both side members 56 and 57 are fastened and integrated by the fastening mechanism 59, and the connecting body 55 is removed by the reverse method described above. .

As described above, when the connecting body 55 is attached and detached, the connecting body 55 and the canopy part 15 of the guard frame 14 do not interfere with each other, and the connecting body 55 can be easily attached and detached.

Further, in the above case, since the lower protruding portion 65 engages with the claw portion 33 of the base 29, the connecting body 55
If the front loader 17 is not removed, the front loader 17 cannot be removed from the tractor 1. Therefore, the front loader 17 is removed from the tractor 1 with the coupling body 55 attached, and the coupling body 55 connects the muffler 8.
There is no risk of damaging it.

Furthermore, although the distance between the support frames 22 of the front loader 17 differs depending on the model, by using the adjustment intervening body 58 whose length corresponds to the difference in the distance, the connecting body 55 can be adjusted. The connecting body 55 can be used for various models of the front loader 17.

As a regulating device for the operating lever 50, a regulating lever 82 for regulating the operating lever 50 is provided on the inner surface of the upper part of the mounting plate 39 so as to be rotatable around a support shaft 83 in the left and right direction. The position can be freely changed between a regulated position shown by a line and a non-regulated position shown by a solid line in FIG. At the rear of the regulation lever 82,
A U-shaped regulation hole 84 is provided that detachably engages with the operating lever 50 in the regulating position, and when the regulating hole 84 is engaged with the operating lever 50, the operating lever 50
is a forward rotation operation, that is, the lift cylinder 23
The lowering operation of the lift arm 19 by
That is, the bucket 18 by the bucket cylinder 20
Regarding the rotation operation, only rotation operation at very low speed is allowed.

A bullet 85 is wound around the support shaft 83 and biases the regulation lever 82 toward the regulation position.

Reference numeral 86 denotes an interlocking lever, which is integrated with the regulation lever 82 and is attached to the right side member 5 when the interlocking body 55 is installed.
Pressed downward by the cylindrical body 72 of 7, the regulation lever 8
2 is set to the non-restricted position, thereby preventing forgetting to connect the connecting body 55 and preventing damage to each member of the front loader 17 due to this.

FIG. 8 shows another example of a regulating device for the operating lever 50, in which a support shaft 83 is supported by a mounting plate 39 and a side plate 87 located on the inner side of the mounting plate 39.
are provided at both ends of the support shaft 83, respectively. The regulation hole 84 of the regulation lever 82 is formed to be elongated in the front-rear direction, and when engaged with the operation lever 50, the control lever 50 is rotated in the front-rear direction, that is, the lift arm 19 is raised and lowered by the lift cylinder 23. However, the rotation operation of the operating lever 50 in the left-right direction, that is, the rotation operation of the bucket belt 18 by the bucket cylinder 20 is prohibited.

(Effects of the invention) As described in detail above, according to the invention, by using an adjustment interposition body that has a length that corresponds to each model of muzzleloading work machine, the connecting body can be made versatile. , and the connecting body can be manufactured at low cost. The present invention has the above advantages and is of great practical benefit.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a rear view of the main parts, Fig. 2 is a general side view, Fig. 3 is an exploded perspective view of the main parts, and Fig. 4 is an engagement of the rear joining pin. A partially sectional side view showing the structure, FIG. 5 is a side view of the control device, FIG. 6 is a developed sectional view taken along line A-A in FIG.
FIG. 7 is a sectional view taken along the line B--B in FIG. 1, and FIG. 8 is a developed plan view showing the control device for the operating lever. 1...Tractor, 5...Tractor body, 17...
...Front loader, 18...Bucket, 19...
Lift arm, 20...bucket cylinder, 22
...Support frame, 23 ...Lift cylinder, 5
5... Connecting body, 56, 57... Side member, 58...
... Adjustment interposition body, 59 ... Fastening mechanism.

Claims (1)

[Scope of utility model registration request] A lift arm 19 is attached to a pair of left and right support frames 22 fixedly installed on both sides of the tractor body 5, respectively.
Lift cylinder 2 that raises and lowers lift arm 19
3. In a structure in which the base ends of both are pivotally supported and the upper parts of both support frames 22 are connected by a connecting body 55, the connecting body 55 is connected to a pair of left and right side members 56, 57 attached to the upper part of each support frame 22, Both side members 56 and 5 are interposed between both side members 56 and 57.
A fastening mechanism 59 that integrally fastens and integrates the parts 7 in a manner that they can move forward and backward in the left and right direction, and an adjustment intervening body 58 that is interposed between the both side members 56 and 57 and fills the gap between the both side members 56 and 57. A support frame connection device for a muzzleloading work machine, characterized in that: