JPS6319404Y2 - - Google Patents

Description

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

In the front loader, mounting members are provided at the bases of the pair of left and right lift arms, and by attaching these mounting members to support members provided on both sides of the vehicle, the front loader is detachably mounted on the vehicle. . Incidentally, in order to lower the center of gravity of the front loader, the mounting member is mounted at a low position on the vehicle side. Therefore, when attaching or detaching the front loader from a vehicle, it is necessary to lift the attachment member to avoid interference between the attachment member and the front wheels. Therefore, conventionally, both lift arms or both mounting members were equipped with a pair of jacks, and these jacks were used to lift both mounting members during the above-mentioned attachment/detachment. However, it was time-consuming to operate the jacks, and There is a problem that attachment and detachment cannot be easily performed, and there is also the problem that it is necessary to prepare two jacks when attaching and detaching, which is troublesome.

The present invention has solved the above problem, and its characteristics are that a mounting member is provided at the base of the lift arm of a front loader having a bucket cylinder, and the mounting member is provided midway in the longitudinal direction of the vehicle. At the same time, a brace protruding forward is fixed to the mounting member, and a mounting portion provided at the front of the brace is attached to a receiving member provided at the front of the vehicle. By attaching it removably to the
In the case where the front loader is removably attached to the vehicle, the bucket is provided with a removably restricting member that prevents the bucket from rotating with respect to the ground, and the mounting member and the mounting portion are connected to the support member and the receiving member from above, respectively. They are removably fitted and releasably fixed, and when the mounting member and the mounting portion are released from the support member and the receiving member, the respective mounting positions relative to the supporting member and the receiving member and the upper side of the mounting member and the mounting portion are fixed. The lift arm is provided so as to be freely rotatable in the vertical direction about the pivot shaft on the bucket side so that the lift arm can be changed to the removal position and the removal position.

Hereinafter, one embodiment of the present invention will be explained based on the drawings of Figs. 1 to 8. In Figs. 1 to 3, 1 is a tractor body, which is composed of an engine 2, a transmission case 3, etc. ing. engine 2
A front vehicle bearing stand 4 is provided in a forwardly projecting manner, and the engine 2 is covered by a bonnet 5. 6 is a muffler, and 7 is a front wheel.

Reference numeral 8 designates a front loader, which includes a pair of left and right lift arms 10 whose front ends are connected by a connecting member 9, a mounting member 12 pivotally connected to the base of each lift arm 10 via a mounting member side pivot shaft 11, and each lift. A pair of left and right lift cylinders 13 connecting the middle part of the arm 10 and each mounting member 12, and both lift arms 1
A bucket belt 15 pivotally connected to the tip end of the bucket belt 15 via a bucket side pivot shaft 14, a pair of left and right bucket cylinders 16 connecting the middle part of each lift arm 10 and the bucket belt 15, and an inner surface side of each mounting member 12. It consists of a pair of left and right braces 19 that project forward from the top and are provided with a connecting tube 17 and a mounting portion 14, a pair of connecting rods 20 that connect both mounting members 12, and the like. The front loader 8 is removably attached to the front of the tractor via a support member 22 provided on the main frame 21 and a receiving member 24 provided on the attachment plate 23.

The main frame 21 has a pair of left and right parts, and
Fixed on both sides. As shown in FIGS. 4 and 5, from the front side of each main frame 1 corresponding to the center part of the vehicle body 1 in the longitudinal direction, there are a pair of front and rear overhanging members 2.
5 are provided to protrude outward, and a support member 22 is constructed on the outer side of these overhanging members 25. The support member 22 is located substantially in correspondence with the front wheel 7 in the front-rear direction, and includes a rectangular bottom plate 27 fixed to the front and rear overhang members 25.
, a pair of left and right side plates 28 erected from both sides of the bottom plate 27 , a front plate 29 that is inclined forward and connects the front ends of both side plates 28 , and a vertical side plate 28 that is vertically shaped.
The support member 22 is comprised of a rear plate 30 that connects the rear end portions, and the interior of the support member 22 as a whole is tapered downward in side view.

The mounting member 12 has a rectangular cross section, and a fitting portion 31 is formed at the lower end thereof. The fitting part 31 consists of a bottom plate 32, a pair of left and right side plates 33, a front plate 34 that is tilted forward, and a pair of front and rear rear plates 35, 36, which taper downward in side view. It is tapered and removably fitted into the supporting member 22, but at the time of this fitting, both front plates 29, 3
4 and both rear plates 30 and 36 are in contact with each other. The front plate 34 of the fitting part 31 is circumscribed by an arc 37 centered on the bucket side pivot shaft 14, and the rotation of the lift arm 10 around the bucket side pivot shaft 14 causes the mounting member to 12 is a mounting position where the fitting part 31 is removably fitted into the support member 22, as shown in FIG.
As shown in the figure, the fitted position and the detached position which is above the front wheel 7 and separated from the support member 22;
That is, the position can be freely changed between the detached position and the detached position.
Insertion holes 39 into which the upper end of the stand member 38 is removably inserted are formed in the side plates 33 of the fitting portion 31 in the lateral direction. Reference numeral 40 denotes a mounting member fixing tool, exemplified by a bolt, which is inserted into the rear plate 30 of the supporting member 22 from the rear and fixed to the rear plate 30 of the mounting member 12.
6, the mounting member 12 is removably fixed to the support member 22.

As shown in FIG. 6, the mounting plate 23 is attached to each side of the front end of the front vehicle bearing stand 4 by fixing devices 41, which are exemplified by bolts.
The mounting plate 23 is removably attached to the mounting plate 23 so as to stand upright, and a receiving member 24 extending laterally is fixedly embedded in the upper end of the mounting plate 23. The receiving member 24 has a groove-shaped cross section consisting of front and rear plates 42, 43 and a bottom plate 44, and is tapered downward in side view.

The brace 19 is removably attached to a bracket 45 fixed to the upper inner surface of the mounting member 12 with a fixing member 46, which is exemplified by a bolt.
It projects forward, and the front ends of both braces 19 are connected by a connecting tube 17. Attachment portions 18 are fixed to both sides of the connecting tube 17 so as to extend along the lower surface. The mounting portion 18 has a groove-shaped cross section consisting of front and rear plates 47, 48 and a bottom plate 49, and is tapered downward, and is tapered and removably fitted to the receiving member 24. However, during this fitting, both front plates 42, 47 and both rear plates 43, 48 are in contact with each other. Note that the front plate 47 of the mounting portion 18 is
It is circumscribed by an arc 50 centered on the bucket-side pivot shaft 14, and as the lift arm 10 rotates around the bucket-side pivot shaft 14, the mounting portion 18 is
As shown in FIG. 6, the mounting position is fitted into the receiving member 24, that is, the fitted position, and as shown in FIG. In other words, the position can be freely changed between the detached position and the detached position. Reference numeral 51 denotes an L-shaped attachment part fixing device, and a collar 52 is fixed to the middle part.
The mounting portion 18 is removably fixed to the receiving member 24 by being inserted through the holes 9 and 44 and screwed to a nut 53 fixed to the lower surface of the bottom plate 44.

Both connecting rods 20 are stacked in two stages, upper and lower, to connect the upper ends of both mounting members 12. Therefore, a pair of fixed plates 54 are provided at the upper ends of both mounting members 12, and these fixed plates 54 A mounting shaft 55 is erected in the through hole 56 at the end of the connecting rod 20.
It is removably inserted into the. 57 is a pin for preventing removal. As shown in FIGS. 7 and 8, the connecting rods 20 are provided on both sides of the bucket belt 15 and function as restricting members to prevent rotation of the bucket trunk 15 when the front loader 8 is attached to or detached from the tractor. For this reason, fixing plates 59 are fixedly installed on both sides of the top plate 58 of the bucket 15, and the connecting rod 20 is brought into contact with the side plate 60 of the bucket 15, so that the mounting part fixing tool 51 is attached to the connecting rod 20 and the side plate. 60 and screwed to the fixing plate 59, the connecting rod 20 is removably fixed to the bucket 15. Further, a pair of front and rear stoppers 61 and 62 are fixed to the side plate 60 of the bucket 15, and these stoppers 61 and 62 vertically abut the front part of the connecting rod 20, so that the connecting rod 20 stops with respect to the bucket 15. Relative rotation in the counterclockwise direction in FIG. 7 is prevented. In addition, as described above, Bucket 15
The connecting rod 20 attached to the connecting rod 20 extends rearward, and the extending end touches the ground on the outer side of the front wheel 7, and a grounding plate 63 is fixed to the extending end.

In addition, 64 is a hydraulic control valve device for each cylinder 13, 16, which is provided on the mounting member 12 on one side, and this device 64 is connected to each cylinder 13, 16 by a hydraulic hose 66, etc. It is separably connected to the hydraulic system via a hydraulic hose, a self-sealing quick-release fitting, etc. 65 is an operating lever of the device 64.

According to the embodiment configured as described above, when removing the front loader 8 from the tractor, first,
The attachment part fixing tool 51 is removed to release the attachment part 18 and the receiving member 24 from being fixed. Next, both connecting rods 20
As shown in FIG. Prevent rotation. Further, the attachment member fixing device 40 is removed to release the attachment member 12 from being fixed to the support member 22. In this state, the bucket cylinder 16 is retracted using the operation lever 65, the lift arm 10 is rotated upward around the bucket side pivot shaft 14, and the mounting member 12 is attached to the front wheel 7 as shown in FIG. At the same time as moving the attachment part 18 to the upper detachment position,
However, in the embodiment, when the bucket cylinder 16 reaches its contraction limit, the mounting member 12 and the mounting portion 1 are moved to the detached position above the receiving member 24.
8 is moved to a predetermined detachment position,
This allows the mounting member 12 and the mounting portion 18 to be easily positioned at a predetermined detached position, and also protects the hydraulic hose that connects the hydraulic control valve device 64 and the hydraulic system of the tractor. After doing the above, each fitting part 3
The horizontal upper end of the stand member 38 is inserted into the insertion hole 39 of No. 1 to stand the stand member 38 on the ground. In this case, the upright portion of the stand member 38 is located on the outer side of the front wheel 7. Next, the hydraulic pressure in each cylinder 13, 16 is released by the operating lever 65, the rear side of the front loader 8 is supported by the stand member 38, and the hydraulic hose connecting the hydraulic control valve device 64 and the hydraulic system of the tractor is is separated from the tractor side using a self-sealing quick-release fitting. After this, if you move the tractor backwards, the front wheels 7 will be attached to the mounting member 1.
2, the stand member 38, etc., and the removal work of the front loader 8 from the tractor is thus completed. In addition, in the above-mentioned removal work, the connecting rod 20 is used as a member to restrict the rotation of the bucket 15, and the connecting rod 20 is fixed to the bucket 15 by the attachment part fixing device 51, so that the removal is not easy. During work, there is no risk of forgetting to remove the connecting rod 20 or forgetting to release the fixation between the attachment part 18 and the receiving member 24.

Next, when attaching the front loader 8 to the tractor, it is sufficient to perform the work in the reverse order as described above. First, as shown in FIG. 8, and the support member 22 and the receiving member 24 are made to correspond to the attachment member 12 and the mounting portion 18, respectively. Next, the hydraulic control valve device 64 and the hydraulic system of the tractor are connected with a hydraulic hose, hydraulic oil is supplied to the bucket cylinder 16 by the operation lever 65, and the lift arm 1 is
After that, the stand member 38 is removed from the mounting member 12. After doing this, the bucket cylinder 16 is extended by the operating lever 65, the lift arm 10 is rotated downward around the bucket side pivot shaft 14, and the mounting member 12 and the mounting portion 18 are fixed as shown in FIG. Move it to the mating position as shown in . In this case, the fitting portion 31 and attachment portion 18 of the mounting member 12 are connected to the support member 22 and the receiving member 24.
The fitting portions 31 are tapered fitted into each other.
Since the front plates 34 and 47 of the mounting portion 18 are circumscribed by arcs 37 and 50 centered on the bucket side pivot shaft 14, the fitting portion 31 is supported as the lift arm 10 is lowered. It easily enters the member 22 while being guided, and then the mounting portion 18 also enters the receiving member 2.
The fitting portion 31 and the attachment portion 18 that have entered are positioned inside the support member 22 and the receiving member 24, respectively. next,
The mounting member 12 and the support member 22 are fixed by the mounting member fixture 40, the mounting part fixture 51 and the connecting rod 20 are removed from the bucket 15, and the mounting part 18 is fixed by the mounting part fixture 51 to the receiving member 24. However, since the fitting portion 31 and the attachment portion 18 are positioned as described above inside the support member 22 and the receiving member 24, the above-mentioned fixation can be easily performed. After this, by connecting both mounting members 12 with both connecting rods 20, the installation work of the front loader 8 to the tractor is completed.

The front loader 8 is mounted on the tractor as described above, and the fitting portion 31 of the mounting member 12 and the mounting portion 18 of the brace 19 are attached to the support member 12.
2 and the receiving member 24, respectively, so that the front loader 8 has a high attachment strength to the tractor. By the way, during work with the front loader 8, as shown in FIGS. 4 and 6, a load acts on the mounting member side pivot shaft 11 of the lift arm 10 and the brace 19 in the direction of the arrow, respectively. The above tapered fitting part provides good support.

FIG. 9 shows another example of the fixing structure of the mounting member 12, in which a mounting plate 67 is fixedly installed on the lower surface of both overhanging members 25, and a nut 68 is mounted on the upper surface of the bottom plate 32 of the fitting part 31. It is fixed. Further, the mounting member fixing tool 40 is L-shaped, and a flange 69 is provided in the middle of the L-shape.
are fitted and fixed, and the fixture 40 is attached to the mounting plate 67 and both bottom plates 2 of the support member 22 and the fitting part 31.
7, 32 from below and is screwed to the nut 68, the mounting member 12 is attached to the support member 22.
It is removably fixed to the side.

10 and 11 show another example of the present invention in which the rotation of the bucket 15 is prevented by a regulating member 70 that is a separate member from the connecting rod 20. In this case, the regulating member 70 is detachably provided below the bucket 15 between both front wheels 7. The regulating member 70 includes a pair of left and right side plates 71, a connecting plate 72 that connects the rear ends of these side plates 71,
It consists of a connecting reinforcing portion 73 that connects the side plates 71 to each other in an X-shape, and a pair of engagement claws 74 fixedly provided at the front ends of the side plates 71 in a rearwardly projecting manner. By the way, a tooth body 75 is arranged at the front end of the bucket 15, and brackets 76 are integrally provided on both sides of the tooth body 75.
are fixed to both side plates 60 of the bucket 15.
When the front loader 8 is attached to and detached from the tractor, the bucket 15 is placed on the regulating member 70 placed on the ground, and the teeth 75 are sandwiched between the engaging pawl 74 and the main body side of the regulating member 70. This prevents the bucket 15 from rotating with respect to the ground.

As detailed above, the present invention has the following advantages:
A regulating member that prevents rotation with respect to the ground is removably provided, and the mounting member and the mounting portion are removably fitted into the support member and the receiving member from above respectively, and are releasably fixed. The lift arm is arranged so that, when the member and the attachment part are released from the support member and the receiving member, the positions thereof can be changed between the respective mounting positions with respect to the supporting member and the receiving member and a removal position on the upper side thereof. Since the front loader is rotatable in the vertical direction around the pivot shaft on the bucket side, the entire front loader can be easily attached to and detached from the vehicle, and there is no need to prepare a separate jack, which is convenient. The present invention has the various advantages mentioned above, and its structure is simple.
It can be implemented at low cost and is highly profitable.

[Brief explanation of the drawing]

1 to 8 show an embodiment of the present invention,
Figure 1 is a side view of the tractor with a front loader attached, Figure 2 is a front view of the same, Figure 3 is a side view of the front loader and tractor separated, and Figure 4 is a partial cross section of the mounting member and its vicinity. Side view, Figure 5 is the 4th
Figure 6 is a side view of the attachment part and its vicinity; Figure 7 is a partially enlarged view of Figure 3; Figure 8 is a rear view of Figure 7; The figure is a partially sectional side view showing another example of the fixing structure of the mounting member, FIG. 10 is a side view showing another example of the regulating member of the bucket, and FIG. 11 is a plan view thereof. 1...Tractor body, 8...Front loader,
10...Lift arm, 12...Mounting member, 13
... Lift cylinder, 14 ... Bucket side pivot shaft, 15 ... Bucket, 16 ... Bucket cylinder, 18 ... Attachment part, 19 ... Brace, 20 ...
...Connecting rod, 22...Supporting member, 24...Receiving member,
31... Fitting portion, 40... Mounting member fixing tool, 51
... Attachment part fixing tool, 70 ... Regulation member.

Claims (1)

[Claims for Utility Model Registration] A front loader having a bucket cylinder is provided with a mounting member at the base of the lift arm, and the mounting member is
It is removably attached to a support member provided halfway in the longitudinal direction of the vehicle, and a brace that protrudes forward is fixedly attached to the attachment member. A front loader is removably attached to a vehicle by being removably attached to a receiving member provided at the front of the bucket. The member and the attachment part are removably fitted into the support member and the receiving member from above, respectively, and are releasably fixed, and when the attachment member and the attachment part are released from the support member and the receiving member, , the lift arm is provided so as to be freely rotatable in the vertical direction around the bucket-side pivoting shaft so that the position can be changed between the mounting position on the supporting member and the receiving member, and the dismounting position on the upper side thereof. A front loader mounting device featuring: