JPH0419086Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is a front loader that is removably attached to a traveling machine such as a tractor, and is used for loading compost, earth and sand, and leveling fields. This invention relates to an automatic loading device for a loader.

"Prior Art" Conventionally, as shown in Japanese Utility Model Application Publication No. 57-160349, there has been a technique for carrying out civil engineering work by attaching a front loader to a traveling aircraft.

"Problems to be Solved by the Invention" In the prior art, the rotation fulcrum frame was supported on the side surface of the middle part of the traveling machine via the support shaft and the engagement groove, but the rotation fulcrum frame was supported in front of the traveling machine. Since there is no locking member to connect the rotary fulcrum frame to the front part of the traveling aircraft, manual installation work by the operator is required to connect the rotation fulcrum frame to the front of the traveling aircraft, which simplifies the installation process and improves safety. There were some handling problems that could not be avoided.

``Means for Solving the Problems'' However, in the present invention, the lift arm is attached to the intermediate part of the traveling machine body via the rotation fulcrum frame, and the support guide body connected to the front part of the traveling machine body is attached to the rotation fulcrum frame. In an automatic mounting device for integrally connected front loaders, an engagement groove for engaging a support shaft on a side surface of an intermediate portion of a traveling machine body is formed in a rotation fulcrum frame, and the support shaft is engaged in the engagement groove. The present invention is characterized in that a locking member is provided at the front of the traveling machine body, with which the support guide is automatically engaged when the support guide is lifted.

"Operation" Therefore, by rotating the rotation fulcrum frame around the support shaft by the lifting cylinder connected between the lift arm and the rotation fulcrum frame and raising the support guide body, the support guide body can be lifted. It can be automatically fixed to the front of the traveling machine using a locking member, and there is no need for the operator to perform fastening work at the front of the traveling machine, simplifying the installation work and improving safety compared to conventional methods. can be easily achieved.

"Embodiment" Hereinafter, an 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. In the figure, 1 is a tractor which is a traveling body, 2 and 3 are front and rear wheels of the tractor 1, and 4 is a machine base on which the front wheel 2 is installed. 5 is an engine mounted on the chassis 4; 6 is a rear wheel 3 connected to the engine 5;
7 is a driver's seat attached to the rear upper surface of the case 6; 8 is a steering handle; It is equipped.

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 mount that is a rear support member to which the frame 12 is attached, and 14 is a structure that protrudes from both sides of the power transmission case 6. The mounting base 13 is provided in the shape of
A loader rear support base 15 is based on a rear leg frame 16 erected at the rear of the power transmission case 6 and a front leg frame 17 erected and fixed at the outer end of the support frame 14. A safety frame for fixing the ends, and a single base 1
4 supports both base ends of the loader 9 and the safety frame 15.

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 so that the lift arm 11 can be moved up and down as appropriate 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. are interlocked and connected via pins 31, 32 and a dump link 33. Then, the rear lower end of the bucket 10 is connected to the lift arm 11.
It is supported by a fixed mounting plate 34 at the front end via a pin 35, and the tilt of the bucket 10 can be changed as appropriate by the expansion and contraction movement 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 between their upper ends with a protection rod 38 serving as a support guide, and between their lower ends with a holding rod 39, forming a frame structure with these frames 37 and rods 38 and 39. Adjustment bolt 4
A support leg 41 is provided to protrude through the support leg 41.

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 front holding portion 43 which is a front support member of the loader 9 and holds the supporting leg frame 37 at an upper position. The holding portion 43 includes a loader holding box 45 that forms a tapered groove 44 in the lower part into which the holding rod 39 is inserted.
and a substantially U-shaped cam body 47 which is swingably mounted in the box 45 via a shaft 46 and whose engagement recess 47a with the holding rod 39 faces the tapered groove 44.
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 39.
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 47 is engaged and held; The position of the pin 50 relative to the cam body 47 is released when the pin 50 is fixed and the other end protrudes outside the box 45 through the loose fitting hole 51, and the pin 50 is moved back against the spring 49 and positioned at the backward movement position 48b of the guide 48. 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 the center portions of these connecting plates 53, 54 are integrally connected by a reinforcing plate 55. A rear connecting plate 53 is removably fixedly supported on the front bumper 42 via bolts 56. A balancing weight 57 is appropriately fitted and supported on the connecting plate 54, so as to balance the weight when the front loader 9 is installed.

Incidentally, a receiving frame 58 for attaching the rotation fulcrum frame 12 is integrally fixed to the upper end of the mounting base 13, and the supporting shaft 18 is attached to the receiving frame 58. A hook-shaped engagement groove 59 to be engaged with the support shaft 18 is formed at the lower end of the rotation fulcrum frame 12, and the rotation fulcrum is connected to the receiving frame 58 of the mounting base 13 via the support shaft 18 and the engagement groove 59. It supports the frame 12 in a swingable manner, and is provided with a rear holding portion 60 consisting of a combination of a support shaft 18 and an engagement groove 59 that engage and fix the front loader 9 approximately in the middle of the tractor 1, and is formed in the front-rear direction. The engaging groove 59 is constituted by the retaining portion 59a and the opening portion 59b opened in the vertical direction.

As is clear from the above, the rotation fulcrum frame 1
In the automatic mounting device for a front loader, the lift arm 11 is attached to the intermediate portion of the tractor 1 via the lever 2, and the holding rod 39, which is a support guide connected to the front portion of the tractor 1, is integrally connected to the rotation fulcrum frame 12. Support shaft 18 on the side of the middle part of the tractor 1
The engagement groove 59 to be engaged with the rotation fulcrum frame 12
and a cam body 47 which is a locking member that is automatically engaged with the holding rod 39 by lifting the holding rod 39 with the support shaft 18 engaged in the engagement groove 59. It is provided in the front part of the tractor 1, and as shown in FIG. 7, the engagement groove 59 is fitted onto the support shaft 18, and the rotation fulcrum frame 12 is rotated about the support shaft 18 by the lifting cylinder 23 and held. Bar 39
By raising the holding rod 39, the cam body 4
7 so that it is automatically fixed to the front part of the tractor 1.

The present embodiment is configured as described above, and the lift cylinder 23 is driven to vertically swing 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 tiller 1 is moved back and forth by swinging and rotating the tractor 1 back and forth, scooping and loading of compost and soil, etc. is performed. This is to carry out field leveling work according to 10.

When the front loader 9 is attached to the tractor 1, the bucket 10 is attached as shown by the imaginary line in FIG.
The tractor 1 is moved to the rear of the loader 9 supported by the supporting legs 41, and the lifting cylinder 23 is
When the lift arm 11 is contracted, the rear end of the lift arm 11 is lowered, and the rotation fulcrum frame 12 is also lowered. During this descent, the receiving frame 6 of the mounting base 13
5, the lower end of the frame 12 is inserted into the opening 59b, and the support shaft 18 of the receiving frame 58 is inserted into the engagement groove 59.
The frame 12 is supported by the support shaft 18 by being inserted through the support shaft 18. After this, when the cylinder 23 is further contracted, the pivot frame 12 rises to a substantially upright state about the support shaft 18 as shown by the solid line in FIG. 7, and the support frame 37 is lifted up via the side frame 36. The holding rod 39 of the supporting leg frame 37 is engaged with and held in the holding box 45, and as shown in FIG.
When the tapered groove 44 of No. 5 is moved upward in the direction of the broken line arrow, the holding rod 39 is pushed in the direction of the solid line arrow by the guidance of the tapered surface 44a of the groove 44, and the entire front loader 9 moves rearward. do. As a result, the rotation fulcrum frame 12 also moves rearward, causing the retaining portion 5 which is the hook-shaped tip of the engagement groove 59 to move backward.
When the support shaft 18 is engaged with the frame 9a, the frame 12 and the mounting base 13 are prevented from coming apart and are integrally connected. When the holding rod 39 comes into contact with one claw portion 47b of the cam body 47, and the cam body 47 is rotated clockwise about the shaft 46, the other claw portion 47c comes into contact with the positioning pin 50.
The pin 50 is moved back against the compression spring 49, and after the claw portion 47c has passed the pin 50 position, the spring 49 returns the pin 50 again to move the cam body 47 counterclockwise, as shown in FIG. The holding rod 39 is engaged and held between the tapered groove 44 and the engagement recess 47a of the cam body 47 while preventing rotation in this direction. In this state, the support shaft 18 is also engaged with the distal end retaining portion 59a of the engagement groove 59, and disassembly of the rotation fulcrum frame 12 and the mounting base 13 is completely prevented, and the frame The mounting position of the lift arm 12 is fixed, and from then on, only the lifting and lowering operations of the lift arm 11 are performed by the expansion and contraction operations of the cylinder 23.

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, the support leg 41 is grounded again by extending the cylinder 23, and the front loader 9 is removed from the tractor 1 while being supported by the bucket 10 and the supporting legs 41.

In this way, the front loader 9 in this embodiment
The front loader 9 can be reliably integrally connected to the tractor 1 by an extremely simple means of simply engaging the holding rod 39 and the engagement groove 59 on the side, the tapered groove 44 on the tractor 1 side, and the support shaft 18. It is possible.

"Effects of the Invention" As is clear from the above embodiments, the present invention attaches the lift arm 11 to the middle part of the traveling machine body 1 via the rotation fulcrum frame 12, and also provides a support guide body 39 connected to the front part of the traveling machine body 1. In an automatic mounting device for a front loader, which is integrally connected to a rotation fulcrum frame 12, a support shaft 1 on a side surface of an intermediate portion of a traveling machine body 1
The engagement groove 59 to be engaged with the rotation fulcrum frame 1
2, and the support shaft 18 is formed in the engagement groove 59.
A lock member 47 is provided at the front of the traveling machine body 1, and the lock member 47 is automatically engaged with the support guide body 39 by lifting the support guide body 39 in a state in which the lock member 47 is engaged with the lift arm 11. The support shaft 1 is
By rotating the rotational fulcrum frame 12 about 8 as a fulcrum and raising the support guide 39, the support guide 39 is secured to the traveling body 1 by the locking member 47.
It can be automatically fixed to the front part, eliminating the need for workers to perform fastening work at the front part of the traveling aircraft 1, simplifying the installation work and improving safety compared to conventional methods. It is something that can be done.

[Brief explanation of the drawing]

Fig. 1 is an overall side view showing one embodiment of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a partial external perspective view of the front loader, Fig. 4 is a side view of the same, and Fig. 5 is the same. Partial plan view, Figure 6 is an enlarged side view of the same part, Figure 7
The figure is an explanatory diagram of the operating state of FIG. 4, and FIG. 8 is an explanatory diagram of the working state of FIG. 6. 1... Tractor (traveling body), 9... Front loader, 18... Support shaft, 43... Front holding part, 5
9...Engagement groove, 59a...Removal prevention part, 59b...
Opening portion, 60... Rear holding portion.

Claims (1)

[Scope of utility model registration request] Lift arm 1 via rotation fulcrum frame 12
1 is attached to the intermediate part of the traveling machine body 1, and a support guide body 39 connected to the front part of the traveling machine body 1 is integrally connected to the rotation fulcrum frame 12. An engagement groove 59 for engaging the shaft 18 is formed in the rotation fulcrum frame 12, and the support guide 39 is lifted with the support shaft 18 engaged in the engagement groove 59. An automatic mounting device for a front loader, characterized in that a locking member 47 with which a guide body 39 automatically engages is provided at the front of the traveling machine body 1.