JPH0260811B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for mounting a front loader, 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 a 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. In addition, the front loader is equipped with a brace on the mounting member so that the impact during work is shared between the front and rear of the tractor body, and the tip of the brace can be attached and detached to a receiving member provided at the front of the vehicle. It is installed.

For this reason, when the front loader is attached to or detached from the vehicle, it is necessary to lift the attaching portion of the distal end of the brace from the receiving member together with the attaching member.
Therefore, in the past, when attaching and detaching, both lift arms or both attachment members were equipped with a pair of jacks, and these jacks were used to lift both attachment members. However, it was time-consuming to operate the jacks, and There is a problem that it is not easy to attach and detach, and at the same time, it is necessary to prepare two jacks when attaching and detaching, which is troublesome.

The present invention has solved the above-mentioned problems, and is characterized by a pair of left and right mounting members, a pair of left and right lift arms whose rear ends are provided on both mounting members so as to be able to move up and down, a bucket belt provided on the front end side of both lift arms so as to be rotatable in the vertical direction; a bucket cylinder provided in both lift arms for rotating the bucket belt in the vertical direction;
A front loader having a pair of left and right braces having attachment portions at the tips thereof and protruding forward from both the mounting members, and a pair of left and right support members provided in the middle part of the vehicle body in the longitudinal direction and the vehicle body. For a vehicle having a pair of left and right receiving members provided at the front part of the vehicle, the mounting members can be freely attached and detached by fitting and removing the mounting members to the supporting members and the mounting portions to the receiving members from above, respectively. A connecting rod that passes above the vehicle and removably connects the two mounting members is provided, and the method includes a connecting rod that removably connects the two mounting members to the front loader. In order to prevent this, one end of the connecting rod that has been removed from both mounting members is removably attached to the bucket that is in contact with the ground, and the connecting rod is attached so that the other end of the connecting rod is grounded behind the bucket. The receiving member and the mounting part are attached to the bucket using a mounting part fixing device that allows the mounting part to be attached and detached, and then, when the bucket cylinder is attached to or detached from the front loader vehicle, the rear end sides of both lift arms are attached. By moving up and down, both mounting members are used as attachment/detachment cylinders that are fitted into and removed from both support members and the above-mentioned two attachment/detachment portions are fitted into and removed from both support members from above, respectively.

Hereinafter, one embodiment of the present invention will be described 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 18, 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, a pair of front and rear overhangs 25 are provided outwardly protruding from the front side of each main frame 21 corresponding to the central portion of the vehicle body 1 in the longitudinal direction. A support member 22 is configured on the outer side of the cut material 25. The support member 22 is located approximately in the longitudinal direction of the front wheel 7, 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 device, exemplified by a bolt, which attaches to the rear plate 3 of the support member 22.
The rear plate 36 of the mounting member 12 is inserted into the rear plate 36 of the mounting member 12 from behind.
By being screwed to the support member 2, the mounting member 12
It is removably fixed to 2.

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. The front plate 47 of the mounting portion 18 is circumscribed by an arc 50 centered on the bucket-side pivot shaft 14, and can be moved up and down as the lift arm 10 rotates around the bucket-side pivot shaft 14. From the installation part 1
8 is a mounting position fitted into the receiving member 24 as shown in FIG. The position can be freely changed to a detached position, that is, a detached position. Reference numeral 51 denotes an L-shaped mounting part fixing device, and a collar 52 is fixed to the middle part of the fixing device 5.
1 is inserted through the connecting cylinder 17 and both bottom plates 49 and 44 of the mounting part 18 and the receiving member 24, and is screwed to a nut 53 fixed to the lower surface of the bottom plate 44, so that the mounting part 18 is connected to the receiving member 24. It is detachably fixed to the member 24.

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 purpose, fixed plates 59 are fixed on both sides of the top plate 58 of the bucket 15, and the connecting rods 20 are brought into contact with the side plates 60 of the bucket 15.
The attachment part fixture 51 is inserted through the connecting rod 20 and the side plate 60 as a regulating member fixture, and is screwed to the fixing plate 59, so that the connecting rod 20 is removably fixed to the bucket 15. Also, the side plate 6 of the bucket 15
A pair of front and rear stoppers 61, 62 are fixedly installed on the 0, and these stoppers 61, 62 vertically contact the front part of the connecting rod 20, so that the connecting rod 20 rotates counterclockwise with respect to the bucket 15 in the counterclockwise direction in FIG. Relative rotation to is prevented. In addition, as described above, the connecting rod 20 attached to the bucket 15 is extended rearward, and the extending end touches the ground on the outer side of the front wheel 7. is permanently installed.

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, etc. It is separably connected to the equipment via hydraulic hoses, self-sealing quick-release fittings, 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. That is, by attaching one end of the connecting rod 20 to the bucket 15 which is grounded by the attachment part fixing device 51, and placing the other end of the connecting rod 20 extending backward from the bucket 15, the connecting rod 20 is grounded. A connecting rod 20 is provided as a regulating member for preventing the bucket 15 from rotating with respect to the ground. 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 used as a cylinder for attachment and detachment. That is, the bucket cylinder 16 is retracted by the operating lever 65 and the lift arm 10 is
As shown in FIG. 3, the mounting member 12 is attached to the front wheel 7 by rotating
At the same time, the mounting portion 18 is also moved to the disengagement position above the receiving member 24.
6 reaches the reduction limit, the mounting member 12 and the mounting portion 18 are moved to a predetermined detachment position, whereby the mounting member 12 and the mounting portion 18
The hydraulic hose connecting the hydraulic control valve device 64 and the hydraulic system of the tractor can be protected. After doing the above, the horizontal upper end of the stand member 38 is inserted into the insertion hole 39 of each fitting part 31, and the stand member 3 is removed.
Place 8 on the ground. In this case, the stand member 38
The upright portion is located on the outside of the front wheel 7. next,
A lever 65 controls the oil pressure in each cylinder 13, 16.
When the front loader 8 is in the released state, 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 connected from the tractor side using a self-sealing quick-release pipe joint. separate. After this,
When the tractor is moved backward, the tractor moves backward without the front wheels 7 interfering with the mounting member 12, the stand member 38, etc., thereby completing the work of removing the front loader 8 from the tractor. 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 to the receiving member 24 by the mounting part fixture 51. However, since the fitting portion 31 and the mounting 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 tapered fitting portion provides good support.

FIG. 9 shows another example of the fixing structure of the mounting member 12, in which a mounting plate 67 is fixed to the lower surface of both overhanging members 25, and a nut 68 is fixed to the upper surface of the bottom plate 32 of the fitting part 31. has been done. Further, the mounting member fixing tool 40 is L-shaped, and a collar 69 is fitted and fixed in the middle part of the mounting member fixing tool 40.
7 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 support member 22 of the mounting member 12
It is removably fixed to the side.

The present invention is as described above, and when the front loader is attached to or detached from the vehicle, one end side of the connecting rod that is removed from both mounting members for preventing the bucket cart from rotating relative to the ground can be freely attached to and detached from the bucket cart in a grounded state. Since the connecting rod is attached to the bucket belt so that the other end of the connecting rod is connected to the ground behind the bucket cart, there is no need for a separate stand member, and the connecting rod can be used when attaching or detaching the front loader. Therefore, there will be no damage to the muffler etc. when attaching and detaching.

Further, since the bucket cylinder is used as a cylinder for attaching and detaching the front loader to and from the vehicle, there is no need to separately prepare a jack for attaching and detaching, which is convenient.

Furthermore, since the connecting member is removably attached to the bucket using the fixture for the receiving member of the brace, there is no danger of forgetting to remove the brace from the receiving member when removing the front loader from the vehicle.

[Brief explanation of drawings]

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. 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 fixing tool.

Claims (1)

[Claims] 1. A pair of left and right mounting members 12, and both mounting members 12.
A pair of left and right lift arms 10 whose rear ends are movable up and down, and a bucket 15 which is rotatable up and down at the front ends of both lift arms 10.
, a bucket cylinder 16 that is provided on both lift arms 10 and rotates the bucket 15 in the vertical direction; A front loader 8 having a pair of braces 19 is mounted on a vehicle having a pair of left and right support members 22 provided at the midway point of the vehicle body 1 in the longitudinal direction and a pair of left and right receiving members 24 provided at the front portion of the vehicle body 1. In contrast, both the mounting members 12 are attached to the supporting members 22, and the mounting portions 1
8 is removably attached to both the receiving members 24 by fitting and removing them from above, and also includes a connecting rod 20 that passes above the vehicle and removably connects both the mounting members 12. In this method, in order to prevent the bucket belt 15 from rotating relative to the ground when the front loader 8 is attached to or detached from a vehicle, one end side of the connecting rod 20, which has been removed from both mounting members 12, is attached to and detached from the bucket trunk 15 in a grounded state. Fixing the attachment part so that the connecting rod 20 can be freely attached to the bucket 15 and the receiving member 24 and the attachment part 18 can be detached so that the other end side of the connecting rod 20 can be grounded behind the bucket 15. After that, when the bucket cylinder 16 is attached to or detached from the vehicle of the front loader 8, the rear end sides of both lift arms 10 are raised and lowered, and both mounting members 12 are attached to both support members 22. A method for mounting a front loader, characterized in that both the mounting and dismounting portions 18 are used as mounting and dismounting cylinders 16 that are fitted into and removed from the respective receiving members 24 from above.