JPH044051Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is a front part that is connected and supported approximately at the middle part and the front part of a traveling machine such as a tractor, and is used for loading compost, earth and sand, etc., and for leveling fields. The present invention relates to a loader mounting device.

"Prior Art" Conventionally, as shown in Japanese Utility Model Application Publication No. 60-96456, a supporting leg support frame is connected to a rotating fulcrum frame to which a lift arm is attached, and a supporting leg holding frame is attached to the front of the chassis of this machine via a cam body. The technology to connect and fix them was developed.

"Problems to be Solved by the Invention" In the prior art, when the supporting leg holding frame is engaged with the cam body, a pin is manually inserted into the chassis of the machine, and the cam body is fixed by the pin. Therefore, when connecting the supporting leg holding frames, it is necessary to insert a pin into the chassis near the frame when the frame is in an unstable supported state, which simplifies the connecting work and improves safety. There were some problems, such as not being able to get it.

"Means for solving the problem" However, the present invention has a support leg holding frame connected to the rotation support frame to which the lift arm is attached,
In a mounting device for a front loader in which a cam body for engaging and connecting a supporting leg holding frame is provided in the front part of the chassis of the present machine, a recess is formed in the cam body, and
A stopper that removably engages in the recess is provided on the chassis of the machine, and the stopper is configured to automatically engage in the recess in conjunction with the engagement operation of the supporting leg holding frame and the cam body. It is something to do.

``Operation'' Therefore, simply by engaging the support leg holding frame with the cam body of the chassis, the cam body is fixed to the chassis by the stopper, so when connecting the support leg holding frame, it is necessary to approach the chassis and perform the fixing operation of the stopper. The cam body can be fixed only by remote control, and the work of connecting the supporting leg holding frame can be simplified and safety can be improved compared to the conventional method.

"Embodiment" An embodiment of the present invention will be described in detail below with reference to the drawings. Fig. 1 is an explanatory diagram of the operating state of the front loader, Fig. 2 is an overall side view, and Fig. 3 is a plan view of the same.
are the front and rear wheels of the tractor 1, 4 is a chassis that is a machine base on which the front wheels 2 are mounted, 5 is an engine mounted on the chassis 4, and 6 is 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 which is a loader mounting frame that supports the lift arm 11, and 13 is a loader rear support base stand provided in a protruding manner on both sides of the power transmission case 6, which is a single base stand. 13 to support the rear part of the loader 9.

As shown in FIGS. 4 and 5, the rotation fulcrum frame 12 has its lower base end connected to the base pedestal 13.
The frame 1 is directly connected removably to the
2, the base end of the lift arm 11 is connected and supported at the upper end of the frame 12 via a rotation fulcrum pin 14, and a pin 16, A loader elevating cylinder 18 is interposed via a loader elevating cylinder 17, and the lift arm 11 is appropriately moved up and down by the expansion and contraction of the cylinder 18.

Further, each swing pin 21, 2 is attached to the fixing bracket 19, 20 at the middle and front end of the lift arm 11.
2 to support the base ends of the dump cylinder 23 and the dump arm 24, and connect the cylinder 23 and the tip of the arm 24 to each other via a pin 25. are interlocked and connected via pins 26, 27 and a dump link 28. Then, the rear lower end of the bucket 10 is connected to the lift arm 11.
It is supported by a fixed mounting plate 29 at the tip via a pin 30, and the tilt of the bucket 10 can be changed as appropriate by the expansion and contraction movement of the dump cylinder 23.

As shown in FIGS. 5 to 8, the rear ends of left and right side frames 31 are integrally fixed in the middle of the rotation fulcrum frame 12, and left and right supporting leg holding frames are attached to the tips of the frames 31 via brackets 32. 33 are integrally fixed. There are three bolts 34 inside the left and right support leg holding frames 33.
The left and right supporting leg frames 35 are integrally connected via a, 34b, and 34c, and the upper ends of the supporting leg frames 35 are integrally fixed with a protection rod 36 that is a protector, and the holding rod 37 that is a tie bar is connected between the lower ends of the supporting leg frames 35. A reinforcing member 38 is integrally fixed from below the protection rod 36 on the inner surface of the supporting leg frame 35 to the middle of the frame 35 to improve its strength. That is, the connecting portion of the side frame 31 to be connected to the traveling body 1 is integrally formed into a square frame shape by the left and right supporting leg frames 35, 35 and the respective rods 36, 37 that connect these to each other. Further, a support leg 39 is formed by bending the lower end of the frame 35 into an outward L-shape, and a bracket 40 is integrally fixed to the front side of the support leg 39, and a stand extension member is attached to the bracket 40 via a mounting bolt 41. The auxiliary support leg 42 is detachably attached.

As shown in FIGS. 9 to 11, a front bumper 43 is integrally fixed to the front end of the chassis 4, and the supporting leg frame 35 is attached to the bumper 43.
A loader front holding device 44, which is a front support member of the loader 9, is provided to hold the loader 9 in the upper position. The holding device 44 has the holding rod 3 at the bottom.
a loader holding box 46 forming a notch 45 into which the loader holding rod 7 is inserted; and a cam body which is swingably attached to the box 46 via a shaft 47 so that the engagement groove 48 with the holding rod 37 faces the notch 45. 49, and a compression spring 51 is attached to the stopper receiving plate 50 in the box 46.
The cam body 49 is supported through the holding rod 37.
A stopper is a cam body positioning member that positions the cam body 49 by engaging with the recess 50a of the receiving plate 50 and the recess 49a of the cam body 49 by the spring force of the compression spring 51 when the cam body 49 is engaged and held. 52
Then, one end was fixed to the stopper 52, the other end was made to protrude outside the box 46 through the loose fitting hole 53, and the stopper 52 was moved back against the spring 51 to be located at the upper surface position 50b of the stopper receiving plate 50. and a release lever 54 that releases the position of the stopper 52 relative to the cam body 49, and integrally connects the rear and front parts of the left and right holding boxes 46, 46 with each other by connecting plates 55, 56. , 56 are integrally connected by a reinforcing plate 57, and a rear connecting plate 55 is detachably fixedly supported by the front bumper 43 via bolts 58. A balance weight 59 is appropriately fitted and supported on the connecting plate 56, and the front loader 9
A reinforcing bracket 60 fixed to the back surface of the box 46 and the connecting plate 55 is removably attached to the outer surface of the chassis 4 via bolts 61 to maintain the weight balance when the holding device is installed. The support strength of 44 is improved.

As is clear from the above, the front loader has the support leg holding frame 33 connected to the rotation fulcrum frame 12 to which the lift arm 11 is attached, and the cam body 49 that engages and connects the support leg holding frame 33 to the front of the chassis 4 of the machine. In the mounting device, a recess 49a is formed in the cam body 49, and a stopper 52 is provided on the chassis 4 of the machine to detachably engage with the recess 49a, and the engagement operation between the supporting leg holding frame 33 and the cam body 49 is controlled. The stopper 52 is configured to automatically engage in the recess 49a in conjunction with the recess 49a.

As shown in FIGS. 6 and 12, a pair of left and right fixing brackets 62 are attached to the lower end of the rotation fulcrum frame 12, which supports the base end of the lift arm 11, the tip of the lifting cylinder 18, and the base end of the side frame 31, respectively. , 62, and open portions 62a, 62 at the bottom of the brackets 62, 62 that are bent more on the rear side than on the front side.
a, and is configured so that it can be engaged and fixed to a loader rear holding device, which will be described later, with sufficient margin.

On the other hand, as shown in FIGS. 13 and 14, a rotation fulcrum frame 12 is mounted on the upper surface of the rear support base 13.
A loader rear holding device 64 is provided as a rear support member of the loader 9 for holding the loader 9 upright. The holding device 64 is erected and fixed on the upper surface of the base 13, and the front and rear parts are integrally connected by connecting plates 65, 66, and has a locking groove 67 in which the engaging pin 63 is fitted in the upper surface of the front part.
A pair of left and right receiving plates 68, 68 forming vertically
The engagement groove 71 with the locking pin 63 is swingably attached between the receiving plates 68, 68 via a fulcrum pin 70 pivotally supported on the boss portions 69, 69 of the receiving plates 68, 68.
a cam body 72 which faces the locking groove 67; and when the cam body 72 engages and holds the engagement pin 63, the spring force of the compression spring 73 causes the receiving plates 68, 6 to
A lock pin retaining groove 75 and a cam body 72 formed at the tip of an inclined guide groove 74 extending forward and downward from the rear surface of 8.
A lock pin 77 is a cam body position holding member that engages with a lock pin engagement groove 76 to maintain the position of the cam body 72, and one end is fixed to the lock pin 77 and a grip bar 78 is horizontally fixed to the other end. At the same time,
The lever support portions 68a, 68a are formed by protruding the intermediate portions upward from the rear portions of the receiving plates 68, 68, and are rotatably fixed to the outside of the lever support portions 68a, 68a via a lever swing fulcrum pin 79. The lock pin 77 is inserted into the guide groove 7 against the spring 73.
4 and a release lever 81 that releases the position holding of the cam body 72 when it is taken out from the support plate 68 and positioned on the rear outside of the receiving plates 68, 68, and the rotation fulcrum frame 12
The engagement pin 63 at the lower end is connected to the receiving plate 6 by the cam body 72.
8, 68 to engage and fix the fulcrum frame 12.
is configured to be directly connected and fixed to the base 13.

The present invention is constructed as described above, and the lifting cylinder 18 is actuated to raise and lower the lift arm 11 around the fulcrum pin 14 to lift the bucket 10, and the dump cylinder 23 is actuated to raise and lower the lift arm 11 around the fulcrum pin 14.
Rock the bucket 10 back and forth around 0,
When the tractor 1 is reciprocated back and forth, scooping and loading of compost, earth, etc. is performed, and when the bucket 10 is grounded and the tractor 1 is moved backward, the field leveling work is performed using the bucket 10.

When the front loader 9 is attached to the tractor 1, the tractor 1 is moved to the rear of the loader 9 supported by the bucket 10 and the supporting legs 39, and the lifting cylinder 18 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 fixed brackets 62, 62 are located outside the receiving plates 68, 68, and the engagement pin 6
3 is engaged and fixed to the receiving plates 68, 68 by the cam body 72, and the rotation fulcrum frame 12 is directly connected and fixed to the loader rear holding device 64. That is, the first
As shown in FIG.
When moving the upper part downward, the claw part 7 on the lower side of the engagement groove 71
2a and rotates the cam body 72 counterclockwise around the fulcrum pin 70. When the engagement pin 63 moves into the engagement groove 67 formed at the end of the slide surface 68b, the engagement pin 63
The engagement groove 71 of the cam body 72 is fitted from above, and the lock pin engagement groove 75 of the receiving plates 68, 68 is fitted into the engagement groove 71 of the cam body 72 from above.
When the lock pin engagement groove 76 of the cam body 72 is aligned with the lock pin 77, the force of the spring 73 moves the lock pin 77 toward the lower end of the guide groove 74 and fits into each groove 75, 76, as shown in FIG. The cam body 72 is held in position by the receiving plates 68, 68.
The engagement pin 63 is engaged and fixed between the engagement grooves 67, 67 of the cam body 72 and the engagement groove 71 of the cam body 72. After this, when the cylinder 18 is further reduced, the fourth
As shown in the figure, the rotation fulcrum frame 12 rises to a substantially upright state around the pin 63, and the supporting leg frame 35 is lifted up via the side frame 31, and the holding rod 37 of the frame 35 engages with the holding box 46. is maintained. That is, as shown in FIG.
When the cam body 49 is moved upwardly, the holding rod 37 is attached to one claw portion 49b of the cam body 49 which is formed by sandwiching the engagement groove 48.
contact and rotate the cam body 49 clockwise about the shaft 47. Then, the cam body 49
2, the stopper 52 is moved backward against the compression spring 51, and when the recess 49a of the cam body 49 is aligned with the position of the stopper 52, the first
As shown in FIG. 0, the force of the spring 51 returns the stopper 52 to position the cam body 49, and the holding rod 37 is engaged and held between the notch 45 and the engagement groove 48 of the cam body 49. do. As a result, the supporting leg frame 35 and the supporting leg 39 are retracted, and at the same time, the rotation fulcrum frame 12 is also fixed in position, and from this point on, only the lift arm 11 moves up and down as the cylinder 18 expands and contracts. .

On the other hand, when removing the front loader 9 from the tractor 1, the stopper 52 is moved back by operating the release lever 54 and held at the upper surface position 50b of the receiving plate 50, as shown by the imaginary line in FIG. The restriction of the holding rod 37 by the cam body 49 is released, and in this state, contrary to the above, the cylinder 18 is
By extending the support leg 39, the support leg 39 is grounded again. After this, as shown by the imaginary line in Fig. 13,
By operating the other release lever 81, the lock pin 77 is taken out from the guide groove 74 to the rear side of the receiving plates 68, 68, the restriction of the engagement pin 63 by the cam body 72 is released, and the cylinder 18 is further extended. By doing so, the rotation fulcrum frame 12 is released upward from the loader rear holding device 64, and the tractor 1 and the front loader 9 are 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 39, and the single lifting cylinder 18 can be effectively used when attaching to and detaching from the main body of the tractor 1. At the same time, the loader holding devices 44 and 64 provided at the front and approximately intermediate portions of the tractor 1 allow one worker to automatically and easily attach and detach the loader without bothering other workers. It can be done.

"Effects of the Invention" As is clear from the above embodiments, the present invention has the supporting leg holding frame 33 connected to the rotation fulcrum frame 12 to which the lift arm 11 is attached, and the supporting leg holding frame 33 is connected to the front part of the chassis 4 of the machine. In a mounting device for a front loader that is provided with a cam body 49 to be coupled and connected, a recess 49a is formed in the cam body 49, and a stopper 52 that is removably engaged with the recess 49a is provided on the machine chassis 4 to hold the supporting leg. The stopper 52 is configured to automatically engage the recess 49a in conjunction with the engagement operation between the frame 33 and the cam body 49, and simply by engaging the supporting leg holding frame 33 with the cam body 49 of the chassis 4. Since the cam body 49 is fixed to the chassis 4 by the stopper 52, there is no need to approach the chassis 4 and fix the stopper 52 when the supporting leg holding frame 33 is connected, and the work of fixing the cam body 49 can be done only by remote control. This makes it possible to simplify the work of connecting the support leg holding frame 33 and improve safety compared to the conventional method.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the operating state of a front loader showing an embodiment of the present invention, FIG. 2 is an overall side view, FIG. 3 is a plan view of the same, FIG. 4 is an enlarged side view of the front loader, and FIG. The figure is an enlarged perspective view of the same, Figure 6 is an explanatory diagram of the installation of the rotation fulcrum frame and the supporting leg frame, Figure 7 is an explanatory diagram of the attachment of the supporting leg frame, Figure 8 is an explanatory diagram of the supporting leg part, and Figure 9 is the front part. A partially enlarged plan view of the holding device part, FIG. 10 is a side view of the same, FIG. 11 is a front view of the same,
Figure 12 is a partially enlarged explanatory diagram of the rotation fulcrum frame;
Fig. 13 is an enlarged side view of the rear holding device section;
15 is an explanatory diagram of the operating state of FIG. 13, and FIG. 16 is an explanatory diagram of the operating state of FIG. 10. 1... Traveling aircraft, 9... Front loader, 10
...Bucket, 11...Lift arm, 12...
Rotating fulcrum frame, 18... Loader elevating cylinder, 31... Side frame, 35... Support leg frame, 49, 72... Cam body.

Claims (1)

[Scope of utility model registration request] In a mounting device for a front loader, in which a supporting leg holding frame 33 is connected to a rotating fulcrum frame 12 to which a lift arm 11 is attached, and a cam body 49 is provided to engage and connect the supporting leg holding frame 33 to the front part of the chassis 4 of the machine, the cam A recess 49a is formed in the body 49, and a stopper 52 is provided on the chassis 4 of the machine to be removably engaged with the recess 49a. A front loader mounting device characterized in that a stopper 52 is configured to automatically engage.