JPH0213566Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a stand device for a front loader, and an object of the present invention is to facilitate attachment and detachment of a front loader to a vehicle.

The vehicle is equipped with a detachable front loader, and a bracket is provided on the back of the bucket of the front loader.
The tip of the boom and one end of a bucket cylinder that moves the bucket up and down are pivotally connected to the bracket, and a detachable stand is provided on the bucket side to prevent rotation of the bucket with respect to the ground.
There is a type of front loader in which the position of the front loader can be freely changed between an attachment position and a detachment position with respect to a vehicle by rotating the boom around the bucket side pivot shaft due to the operation of the bucket cylinder.

By the way, in the past, if the front loader was left outside the vehicle, the boom would gradually descend due to oil leakage from the bucket cylinder, and when the front loader was reattached to the vehicle, the installation work would have to be done. There was a problem that it could not be done easily.

The present invention has solved the above problem, and its characteristics are as follows: A front loader is removably installed in a vehicle, and the front end of the boom is placed on the working part side of the front loader, and the working part is moved up and down. The working part of the boom is pivotally connected to one end side of the working part cylinder, and the working part side is provided with a detachably extending rear stand that prevents the working part from rotating with respect to the ground. When the front loader is able to change its position between the installation position and the removal position from the vehicle by rotating around the side pivot shaft, the boom can be operated between the boom and the stand while the front loader is in the removal position from the vehicle. In order to prevent downward rotation about the working part side pivot shaft, one end of the holder is removably attached to the stand at a position rearward of the working part side pivot shaft of the boom, and the other end of the holder is It is removably attached to the boom at a position rearward of the working section side pivot shaft of the boom and above one end of the holder.

Hereinafter, the first embodiment of the present invention will be explained in Figures 1 to 11.
To explain based on the drawings, in FIGS. 1 to 3, reference numeral 1 denotes a tractor body, which is composed of an engine 2, a transmission case 3, and the like. The engine 2 is provided with a front vehicle bearing stand 4 projecting forward, and the engine 2 is covered by a bonnet 5. 6 is the front wheel.

Reference numeral 7 denotes a front loader, which is detachably attached to the front of the tractor via a support member 9 provided on the main frame 8 and a receiving member 11 provided on the attachment plate 10. , a pair of left and right booms 1 whose front ends are connected by a connecting member 12
3, and a mounting member 1 pivotally connected to the base of each boom 13.
4, a pair of left and right boom cylinders 15 that connect the middle part of each boom 13 and the mounting member 14 to move the boom 13 up and down, a working part 16 exemplified by a bucket, and a working part 16 that moves the working part 16 up and down. Consists of a working part cylinder 17, a pair of left and right braces 20 that protrude forward from the inner side of each mounting member 14 and are provided with a connecting tube 18 and a mounting part 19, a stand 21 for the left and right pair, a holder 22, etc. has been done.

The main frame 8 has a pair of left and right sides, and is fixed to both sides of the vehicle body 1. Support members 9 are fixed to the main frame 8.
The inside is tapered downward in side view.

The lower part of the mounting member 14 is a fitting part 23 that is tapered upward in side view.
3 is tapered fitted into the support member 9 and is removably fixed by a mounting member fixture 24.
A chevron-shaped protruding plate 25 is provided from the upper end of each mounting member 14.
An engagement shaft 26 is provided to protrude upward through.

As shown in FIG. 4, the mounting plate 10 is attached to each side of the front vehicle bearing stand 4, and at its upper end there is a receiving member 11 having a groove-shaped cross section and tapered downward in side view. is permanently installed.

The base of the brace 20 is fixed to the mounting member 14, and the distal ends of both braces 20 are connected by a connecting tube 18 in front of the bonnet 5. Connecting tube 1
Attaching portions 19 are provided on the lower surfaces of both sides of 8, and have a groove-shaped cross section and are tapered downward in side view.
is provided. Each attachment part 19 is connected to each receiving member 11.
A fitting 27, exemplified by a bolt, is fitted into the mounting part 19 and the receiving member 11,
The mounting portion 19 is removably fixed to the receiving member 11 by being screwed into a nut 28 fixed to the lower surface of the receiving member 11 . As shown in FIGS. 5 to 7, an insertion hole 29 is formed to pass through the base side of each brace 20 in the lateral direction, and a spring steel plate is formed in the middle part of each brace 20 in the longitudinal direction. A holding body 30 is provided. One end of the holding body 30 is fixed to the outer surface of the brace 20 with a bolt 31, a midway portion passes below the brace 20, and the other end faces the inner surface of the brace 20 in a spring-like manner through a gap. A retaining portion 32 that protrudes from the inner surface of the brace 20 is formed at the end.

The working portion 16 has both end portions overlapping the front wheels 6 in the longitudinal direction, and as shown in FIG. 34 is fixedly installed. In the lower end of each bracket 34, the tip of the boom 13 is pivotally connected by a working part side pivot shaft 35, and in the upper end part, one end part of the working part cylinder 17 is pivoted by a working part side pivot shaft 36. tied together.

Each boom 13 is foil-shaped, and
As shown in FIG.
is permanently installed.

The stand 21 has an elongated plate shape, and one corner on the proximal end side is cut out to form a notch 38, and the corner on the same side on the other end side is also cut out, and a ground plate is attached to this part. 39 is fixedly installed. stand 21
A pair of proximal insertion holes 40 are formed at the proximal end side of the , and a pair of midway insertion holes 40 are formed at the midway part in the length direction.
1 is formed, and a tip insertion hole 42 is also formed at the tip.
is formed.

When the front loader 7 is mounted on the tractor, both stands 21 are overlapped so that each ground plate 39 corresponds to the notch 38 on the other side, as shown by the imaginary line in FIG. 2 and in FIG. Along with
The engagement shaft 26 is inserted into the proximal end insertion hole 40 of both stands 21 and the distal end insertion hole 42, and both stands 21 are placed on the protrusion plate 25.
By providing the upper end of the engagement shaft 26 with a retainer 4, exemplified by a β pin, both stands 21 can
Both mounting members 14 are removably connected.

Furthermore, when the front loader 7 is attached to or detached from the tractor, the mounting tool 27 is inserted into the base end insertion hole 40 of each stand 21 near the middle, as shown in FIGS. 1 and 2. The fitting 27 is
The stand 21 is detachably screwed to the outer side plate 33 of each bracket 34 of the grounded working part 16, and the stand 21 extends rearward from the bracket 34, and the ground plate 39 is grounded. In this case, the back plate of the working part 16 is used as a stopper 44, and the proximal corner of the notch 38 of the stand 21 is brought into contact with the stopper 44, so that the stand 21 can be rotated upward around the fixture 27. is prevented. In this way, the stand 21 prevents the grounded working part 16 from rotating with respect to the ground.If the front loader 7 is released from the tractor, the working part cylinder 17 can be operated in the above state. By doing so, the boom 13 is connected to the working part side pivot shaft 3.
5, the front loader 7 can freely change its position between the attachment position to the tractor shown in FIG. 1 and the removal position shown in FIG. The portion 19 is fitted into and removed from the support member 9 and the receiving member 11 from above, respectively. In the above state, the stand 21 is located on the inner side of the front wheel 6, and when the front loader 7 is attached to and detached from the tractor, the stand 21 and the front wheel 6 do not interfere, and the front loader 7 can be attached and detached easily. In addition, the stand 21 is less likely to interfere with changing the front wheel tread.

The holder 22 has an elongated plate shape, and has a long hole 45 at the base end.
is formed, and an insertion shaft 46 that protrudes to both sides is fixed to the distal end, and an engagement plate 47 is fixed to the inner surface of the distal end, and the distal end side of the engagement plate 47 is held through the gap. It faces the body 22.

When the front loader 7 is attached to the tractor, the holding body 22 is attached to the inner surface of each brace 20 so that it is not visible from the outside, improving the appearance and preventing it from getting in the way of front loader work. It is designed to prevent this from happening. This installation is performed as follows. That is, the insertion shaft 46 of the holder 22 is inserted into the insertion hole 29 of the brace 20, the holder 22 is rotated downward around the insertion shaft 46, and the midway portion in the longitudinal direction is connected to the holder 30. Holder 30 between braces 20
The holder 22 is attached to the brace 20 by being pushed through the elastic deformation of the holder 22 . Further, the holding body 22 is removed from the brace 20 by performing the above procedure in reverse.

When attaching or detaching the front loader 7 to a tractor, as shown in FIG. The holding body 22 is detachably interposed between the midway portions in the width direction, thereby preventing the boom 13 from rotating downward about the working section side pivot shaft 35. The above-mentioned installation of the holder 22 is carried out as follows. That is, as shown by the imaginary line in FIG. 11, with the holder 22 tilted backward and the engagement plate 47 not interfering with the stand 21, the inner part of the insertion shaft 46 of the holder 22 is inserted into the stand. 21 into the distal end of the midway insertion hole 41, and then, as shown by the solid line in FIG. The stand 21 is engaged in between to prevent the insertion shaft 46 from coming out from the midway insertion hole 41, and the mounting shaft 37 provided around the boom 13 is inserted into the elongated hole 45 of the holder 22. This mounting shaft 37
Attach the stopper 43 to the As a result, the holding body 2
One end side of the holder 22 is removably attached to the stand 21 at a position rearward of the pivot shaft 35 on the working section side of the boom 13, and one end side of the holder 22 is attached to the boom 13 on the working section side of the boom 13. It is detachably attached at a position rearward of the pivot shaft 35 and above one end of the holding body 22.

According to the embodiment configured as described above, when removing the front loader 7 from the tractor, first,
After removing the stopper 43, the stand 21, the holder 22, the mounting member fixing tool 24, and the mounting tool 27, the first
As shown in the figure, each stand 21 is attached to the bracket 34 of the working section 16 using a fixture 27. Next, operate the working part cylinder 17 and boom 1
3 upwardly around the working part side pivot shaft 35,
The front loader 7 is placed in the removal position shown in FIG.
The holder 22 is interposed between the boom 13 and the stand 21, and a retainer 43 prevents the holder 22 from coming off the mounting shaft 37. Thereafter, when the tractor is moved backward from the front loader 7, the work of removing the front loader 7 from the tractor is completed.

Furthermore, when attaching the front loader 7 to the tractor, the procedure may be reversed to that described above.

As described above, even when the front loader 7 is removed from the tractor, the mounting tool 27 and the stopper 43
There is no risk of losing these items.

FIG. 12 shows a second embodiment of the present invention.
The back plate of the working part 16 is not used as a stopper, and the back plate of the working part 1
On the outer side plate 33 of the bracket 34 of No. 6,
A stopper 44 that projects outward is separately provided. When the stand 21 is attached to the side plate 33, the stand 21 does not come into contact with the back plate of the working section 16, but the lower surface of the base end of the stand 21 comes into contact with the stopper 44.

Further, the holding body 22 is attached to the stand 2 at one end thereof.
The stand 21 is rotatably supported by a midway fixing plate 48 fixed at the midway point of the stand 21, and the other end is normally attached to the tip of the stand 21 as shown by the imaginary line in FIG. The mounting shaft 3 is attached to the fixed tip plate 49.
7, it can be detachably attached. In the detached position of the front loader 7, the other end of the holder 22 is attached to the boom 13, as shown by the solid line in FIG.
It is removably attached to a mounting plate 50 provided below from a midway portion in the length direction near the distal end by a mounting shaft 37.

As detailed above, according to the present invention, a holder can be freely attached and detached between the boom and the stand to prevent the boom from rotating downward about the working part side pivot shaft when the front loader is removed from the vehicle. Since the front loader is installed in the vehicle, even if the front loader is left in the removed position from the vehicle, the boom will not gradually descend due to oil leakage from the working cylinder, and it will be easier to reinstall the front loader in the vehicle. can also be done easily. The present invention has the various advantages mentioned above and is of great practical benefit.

[Brief explanation of drawings]

1 to 11 show a first embodiment of the present invention, FIG. 1 is a side view of a tractor with a front loader attached, FIG. 2 is a side view of the front loader and tractor separated, and FIG. 3 is a front view of the tractor. A front view of the tractor with a loader attached, FIG. 4 is a vertical cross-sectional view of the attachment part and its vicinity, FIG. 5 is a partial cross-sectional plan view of the grace and holding body, and FIG. 6 is a 7 is a sectional view taken along the line A, FIG. 7 is a view taken along the B arrow in FIG. 6, FIG. 8 is a partially sectional side view of the bracket of the working part and the base of the stand, and FIG. 9 is a partially enlarged view of FIG. 2. , FIG. 10 is a view in the direction of arrow C in FIG. 9, FIG. 11 is a view in the direction of arrow D in FIG. be. 1...Tractor body, 7...Front loader,
8...Main frame, 13...Boom, 14...Mounting member, 15...Boom cylinder, 16...Working part, 17...Working part cylinder, 21...Stand, 22...Holding body, 27... Mounting tool, 34...
Bracket, 44...Stoppa.

Claims (1)

[Scope of utility model registration request] The vehicle is equipped with a detachable front loader, the front end of the boom is pivotally connected to the working part side of the front loader, and one end side of the working part cylinder that moves the working part up and down, and the grounded working part is attached to the working part side. The front loader is equipped with a removable stand that extends rearward and prevents the front loader from rotating relative to the ground, and the front loader can be attached to and removed from the vehicle by rotating the boom around the pivot shaft on the working part side by operating the working part cylinder. In the case where the position can be changed freely between the boom and the stand, one end of the holder is installed between the boom and the stand to prevent the boom from rotating downward about the pivot shaft on the working part side when the front loader is removed from the vehicle. , is removably attached to the stand at a position rearward of the boom's working section side pivot shaft, and the other end of the holder is attached to the boom at a position rearward of the boom's working section side pivot shaft and behind one end of the holder. A front loader stand device characterized by being detachably attached at an upper position.