JPH0316910Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a front loader that is removably installed at the front and approximately the middle of a traveling machine such as a tractor, and is used for loading compost, earth and sand, and leveling fields. The present invention relates to a loader mounting device.

Conventionally, as shown in Japanese Utility Model Application Publication No. 57-160349, there has been a technique in which a supporting leg frame is connected and fixed to the front part of a machine base for mounting a front wheel.

However, the above-mentioned conventional technology is
As shown in Publication No. 26059, since the method uses a means of fixing by inserting and removing pins, attachment and detachment are troublesome and require dangerous operations, and the structure does not allow for easy improvement of support strength. I had the above problem.

However, in the present invention, a supporting member having a left and right external width larger than the left and right width of the machine base for mounting the front wheels is integrally connected to the front part of the machine base, and left and right supporting leg frames whose lower ends are integrally connected to both ends of the holding rod are provided. The spacing is approximately equal to the left and right external width of the support member, and the support member is provided with a downwardly opening notch into which the holding rod is inserted from below, and the holding rod and the left and right supporting leg frames connected in a U-shape are connected to each other. It is characterized in that it is configured to be fitted and fixed to the front part of the table from below via a support member.

Therefore, since the horizontal width of the supporting member is larger than the horizontal width of the machine base, the front and side surfaces of the machine base can be used to easily improve the mounting strength of the supporting member and simplify the mounting structure. By sandwiching the support member between the left and right supporting leg frames connected by a rod, the lateral swing strength can be easily improved, and by using the holding rod that connects the left and right supporting leg frames in a U-shape and engaging the supporting member from below, The supporting leg frame can be connected to the machine base only by remote control using the hydraulic cylinder of the front loader, and the handling and safety of attachment/detachment operations can be improved more easily than before.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. Fig. 1 is a side view of the whole, and Fig. 2 is a plan view of the same.
Reference numeral 3 denotes the front and rear wheels of the tractor 1, 4 a chassis that is a machine base on which the front wheels 2 are mounted, 5 an engine mounted on the chassis 4, and 6 a power source connected to the engine 5 to mount the rear wheels 3. A transmission case, 7 is a driver's seat attached to the rear upper surface of the case 6, 8 is a steering handle, and a bucket 10 of a front loader 9 is installed in front of the tractor 1 via a pair of left and right lift arms 11. . Further, in the figure, 12 is a rotation fulcrum frame that is a loader mounting frame that supports the lift arm 11, 13 is a frame mounting base that is a rear support member to which the frame 12 is attached, and 1
Reference numeral 4 denotes a loader rear support base that is provided in a protruding manner on both sides of the power transmission case 6 and fixes the mounting base 13 upright; and 15, a rear leg frame 16 that is erected at the rear of the power transmission case 6 and the support. Front leg frame 17 erected and fixed on the outer end side of frame 14
The loader 9 and the safety frame 1 are attached to the single base 14.
It is configured to support both proximal end portions of 5.

As shown in FIGS. 3 and 4, the rotation fulcrum frame 12 has its lower proximal end swingably attached to the upper end of the frame mount 13 via a locking pin 18. The lift arm 1 is connected to the upper end of the lift arm 1 through a rotation fulcrum pin 19.
1, and a fixed locking plate 2 between the lower end of the frame 12 and the lift arm 11.
0 through the pins 21 and 22 between the lifting cylinder 2
3 is interposed therebetween, and the lift arm 11 is moved up and down appropriately by the expansion and contraction operation of the cylinder 23.

Further, each swing pin 26, 2 is attached to the fixing bracket 24, 25 at the middle and front end of the lift arm 11.
7 to support the base ends of the dump cylinder 28 and the dump arm 29, and connect the cylinder 28 and the tip of the arm 29 to each other via a pin 30, and connect the tip of the arm 29 to the rear upper end of the bucket 10. They are interlocked and connected via pins 31, 32 and a dump link 33. Then, the lower rear end of the bucket 10 is supported by a fixed mounting plate 34 at the front end of the lift arm 11 via a pin 35,
The structure is such that the inclination of the bucket 10 can be changed as appropriate by the expansion and contraction operation of the dump cylinder 28.

Furthermore, the rear ends of the left and right side frames 36 are integrally fixed to the middle of the rotation fulcrum frame 12, and the middle of the left and right supporting leg frames 37 are integrally fixed to the tips of the frames 36. The left and right support leg frames 37 are interconnected by a protection rod 38 between the upper ends and a holding rod 39 between the lower ends, and the frame 3
A support leg 41 is protruded from below 7 via an adjustment bolt 40.

As shown in FIGS. 5 and 6, the chassis 4
A front bumper 42 is integrally fixed to the front end of the loader 9, and the bumper 42 is provided with a loader front holding device 43 which is a front support member of the loader 9 and holds the supporting leg frame 37 at an upper position. The holding device 43 has the holding rod 39 at the bottom.
a loader holding box 45 forming a notch 44 into which the loader is inserted; and a substantially U-shaped loader holding box 45 that is swingably attached to the box 45 via a shaft 46 so that a recess 47a for engaging the holding rod 39 faces the notch 44. cam body 4
7, the cam body 47 is movably provided in the box 45 via a pin guide 48, and the cam body 47 is attached to the holding rod 3.
A positioning pin 50 is a cam body positioning member that positions the cam body 47 by positioning the guide 48 at the forward position 48a by the spring force of the compression spring 49 when the cam body 9 is engaged and held; is fixed and the other end is projected outside the box 45 through the loose fitting hole 51, and the pin 50 is moved back against the spring 49 to position the guide 48 at the backward movement position 48b. The rear and intermediate portions of the left and right holding boxes 45, 45 are integrally connected to each other by connecting plates 53, 54, and a reinforcing plate 55 is provided between the centers of these connecting plates 53, 54. The bolts 56 are integrally connected to the front bumper 42.
The rear connecting plate 53 is removably fixedly supported through the rear connecting plate 53. A balance weight 57 is appropriately fitted and supported on the connecting plate 54 to balance the weight when the front loader 9 is installed, and a reinforcing bracket is fixed to the back side of the box 45 and the connecting plate 53. 58 is removably attached to the outer surface of the chassis 4 via bolts 59 to improve the support strength of the holding device 43.

As is clear from the above, the support member 43, which has a larger left and right external width than the left and right width of the machine base 4 for mounting the front wheels 2, is integrally connected to the front part of the machine base 4, and the holding rod 39
The spacing between the left and right supporting leg frames 37, 37 whose lower end sides are integrally connected to both ends is formed to be approximately equal to the left and right external width of the support member 43, and a downward opening type notch 44 into which the holding rod 39 is inserted from below. is provided on the support member 43, and the holding rod 39 and the left and right supporting leg frames 37, 37 connected in a U-shape are fitted and fixed to the front part of the machine base 4 from below via the support member 43.

As shown in FIGS. 7 and 8, the frame mount 13 is fixedly supported in the middle by a holding bracket 60 fixed to the transmission case 6 and the base 14 via a pipe 61 and a through bolt 62, and 14 supports the lower end of the frame mount 13 via bolts 63. Further, the base end of the front leg frame 17 is removably erected and fixed to the outer end of the base 14 via a bolt 64.

On the other hand, a receiving frame 65 for attaching the rotation fulcrum frame 12 is integrally fixed to the upper end of the mounting base 13, and a pin hole 66 through which the locking pin 18 is inserted is opened in the receiving frame 65. A retaining metal fitting 68 for engaging and fixing a retaining pin 67 attached to the pin 18 is fixed to the receiving frame 65.
Further, a locking pin 18 is provided on the rotation fulcrum frame 12.
A shaft pipe 69 is integrally fixed to engage the
The lower base end of the rotation fulcrum frame 12 is swingably supported by the receiving frame 65 via the locking pin 18 and the shaft pipe 69. Furthermore, a pipe guide plate 70 is integrally attached to the inner surface of the receiving frame 65 to guide and support the outer protruding end of the frame 12 of the shaft pipe 69. When installing, the shaft pipe 6
9 to the pipe fitting portion 70 of the guide plate 70.
The structure is such that it is supported by a to improve its mounting strength.

The present invention is constructed as described above, and the lifting cylinder 23 is driven to raise and lower the lift arm 11 to lift the bucket 10, and the dump cylinder 28 is driven to swing and rotate the bucket 10 back and forth. When the tractor 1 is moved back and forth, scooping and loading of compost and earth and sand is carried out, and when the bucket 10 is grounded and the tractor 1 is moved backwards, the field is leveled by the bucket 10. .

When the front loader 9 is mounted on the tractor 1, the tractor 1 is moved to the rear of the loader 9 supported by the bucket 10 and the supporting legs 41, and the elevating cylinder 23 is reduced, as shown in FIG. When the lift arm 11 is moved, the rear end of the lift arm 11 is lowered, and the rotation fulcrum frame 12 is also lowered. During this lowering, the lower end of the frame 12 is fitted into the receiving frame 65 of the mounting base 13, and the frame 12 is fixed to the receiving frame 65 by the locking pin 18. After this, when the cylinder 23 is further contracted, the pivot frame 12 rises to a substantially upright state around the pin 18, and the supporting leg frame 37 is lifted up via the side frame 36, as shown in FIG. 37 of the holding rods 39 are engaged with and held in the holding box 45. That is, as shown in FIG.
When moving upward in the notch 44 of the cam body 47, the holding rod 39 comes into contact with one claw portion 47b of the cam body 47, and the cam body 47
rotate clockwise around shaft 46. When the other claw portion 47c comes into contact with the positioning pin 50, the pin 50 is moved backward against the compression spring 49, and after the claw portion 47c passes the position of the pin 50, as shown in FIG. The spring 49 returns the pin 50 to prevent the cam body 47 from rotating counterclockwise, and the holding rod 39 is engaged and held between the notch 44 and the engagement recess 47a of the cam body 47. As a result, the supporting leg frame 37 and the supporting leg 41
is stored, and at the same time the rotation fulcrum frame 1
2 is also fixed in position, and from this point onward, as the cylinder 23 expands and contracts, only the lift arm 11 moves up and down.

On the other hand, when removing the front loader 9 from the tractor 1, the pin 50 is removed from the pin guide 4 by operating the release lever 52 as shown in the imaginary line in FIG.
8 to the backward movement position 48b, the restriction of the holding rod 39 by the cam body 47 is released, and then, contrary to the above, by extending the cylinder 23, the supporting leg 41 is grounded again, and the above-mentioned engaged Stop pin 1
8 and expand the cylinder 23 again, the rotation fulcrum frame 12 is attached to the mounting base 1.
3, so that the tractor 1 and the front loader 9 can be separated from each other.

As described above, in this embodiment, the front loader 9 can be firmly and safely supported by the bucket belt 10 and the supporting legs 41, and the elevating cylinder 23 is effectively utilized to save time and effort when attaching and detaching the tractor 1 to the main body. This allows for easy and quick attachment and detachment without any trouble.

As is clear from the above embodiments, the present invention has a support member 43 that is larger in left and right external width than the left and right width of the machine base 4 for mounting two front wheels, and is integrally connected to the front part of the machine base 4, and also has a support member 43 that is connected to both ends of the holding rod 39. The spacing between the left and right supporting leg frames 37, 37 whose lower end sides are integrally connected to each other is formed to be approximately equal to the left and right external width of the support member 43, and a downward opening type notch 44 into which the holding rod 39 is inserted from below is supported. A holding rod 39 and left and right supporting leg frames 37, 37, which are provided on a member 43 and connected in a U-shape, are fitted and fixed to the front part of the machine base 4 from below via the support member 43. Since the horizontal width of the support member 43 is larger than the left and right width, it is possible to use the front and side surfaces of the machine base 4 to easily improve the mounting strength of the support member 43 and simplify the mounting structure. A support member 4 is placed between the left and right supporting leg frames 37, 37 connected by a rod 39.
3, the left and right swing strength can be easily improved, and the left and right supporting leg frames 37, 37
Since the supporting member 43 is engaged from below using the holding rod 39 that is connected in a shape, the support leg frame 3 can be attached by remote control using the hydraulic cylinder of the front loader.
7 can be connected to the machine base 4, and the ease of handling and safety of attachment/detachment operations can be improved more easily than in the past.

[Brief explanation of drawings]

Fig. 1 is an overall side view showing one embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a partial external perspective view of a front loader, Fig. 4 is a side view of the front loader, and Fig. 5 6 is an enlarged side view of the same portion, FIG. 7 is an enlarged front view of the same portion, FIG. 8 is an enlarged side view of the same portion, FIG. 9 is an explanatory diagram of the operating state of FIG. 4, FIG. 10 is an explanatory diagram of the operating state of FIG. 6. 1... Traveling body (tractor), 4... Machine base (chassis), 9... Front loader, 43... Front support member (loader front holding device).

Claims (1)

[Scope of utility model registration request] Left and right supporting leg frames 37 whose lower end sides are integrally connected to both ends of the holding rod 39 are integrally connected to the front part of the machine stand 4 with a supporting member 43 having a left and right external width larger than the left and right width of the machine stand 4 for mounting the front wheels 2. , 37 is formed to be approximately equal to the left and right external width of the support member 43,
A notch 44 with a downward opening into which the holding rod 39 is inserted from below is provided in the support member 43, and the holding rod 39 and the left and right supporting leg frames 37, 3 are connected in a U-shape.
7 is configured to be fitted and fixed to the front part of the machine base 4 from below via a support member 43.