JPH0752183Y2 - Front loader mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a front loader mounting device for mounting a front loader for carrying compost or sand, for example, on the front part of a tractor.

"Prior Art" Conventionally, as shown in Japanese Utility Model Laid-Open No. 62-44951, a front mounting frame is continuously connected to a rear mounting frame for mounting a lift arm, and a front mounting frame is engaged and coupled to a front portion of a chassis of this machine. There has been a technique in which a cam body is provided and a stopper is provided on the chassis of the main body so as to be engaged with and disengaged from the cam body, and the engagement between the front mounting frame and the cam body is maintained by the stopper.

[Problems to be Solved by the Invention] In the prior art, as in the case of the front mounting frame, the rear mounting frame is connected to the chassis of the machine using the cam body and the stopper. However, it is necessary to remove the four stoppers at the front, rear, left and right, and it is troublesome to remove the stoppers, and even if one of the four stoppers is forgotten to be removed, there is a problem that the mounting frame etc. is deformed and damaged. It was

[Means for Solving the Problems] Therefore, the present invention provides a cam body for connecting the front mounting frame to the rear mounting frame for mounting the lift arm, and for connecting the front mounting frame to the front part of the chassis of the machine. In the mounting device of the front loader, which is provided with a stopper that engages with the cam body so that it can be engaged and disengaged freely in the chassis of the machine, and the engagement between the front mounting frame and the cam body is maintained by the stopper, mount the rear part of the machine chassis. The bottom end of the base is fixed and erected, a notch for opening forward obliquely upward is provided in the middle of the rear mounting base, and a notch for opening frontward in the horizontal direction is provided on the upper end side of the rear mounting base. It is characterized in that a locking pin for engaging and disengaging with each notch is provided on the rear mounting frame.

[Operation] Therefore, since the upper and lower two locking pins of the rear mounting frame are engaged with the notches at the upper and lower two places of the rear mounting base, the conventional cam and stopper for locking the rear mounting frame to the rear mounting base are used. The lift arm can be removed by operating the two stoppers on the left and right of the front part, and the connection structure between the rear mounting frame and the rear mounting base can be simplified and the handling operability such as attachment / detachment and maintenance can be improved more easily than before. I will get it.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to the drawings.
FIG. 1 is a side view of a main part, FIG. 2 is a side view of the whole, and FIG. 3 is a side view of a front loader. In the figure, (1) is a tractor that is a traveling vehicle, (2) (3) Is a tractor (1)
Front and rear wheels, (4) is a chassis that is a machine for mounting the front wheels (2), (5) is an engine mounted on the chassis (4), and (6) is connected to the engine (5). Rear wheel (3)
A power transmission case for mounting the case, (7) is the case (6)
A driver's seat attached to the rear upper surface, (8) is a steering handle, and a bucket (10) which is an attachment of the front loader (9) is mounted in front of the tractor (1) via a pair of left and right booms (11). I have set up. Further, in the figure, (12) is a rear mounting frame that supports the boom (11), (13) is a horizontal mounting frame in which the rear end is integrally connected to the rear mounting frame (12), and (14) is a horizontal mounting frame ( 13) A front mounting frame that is integrally connected to the front end side, in which each frame (12), (13) and (14) is formed in a gate shape in side view, and is fixed to the lower surface side of the power transmission case (6). Table (15)
The rear mounting frame (12) is erected on the rear mounting base (16), and the front mounting base (1) is attached to the front end side of the chassis (4).
The front mounting frame (14) is erected via the 7), and the gate-shaped frames (12), (13) and (14) are installed symmetrically on both sides of the bonnet (18) that covers the engine (5). .

Further, as shown in FIG. 4, the front mounting frame (12)
The boom (11) is attached to the upper end of the boom through a pivot pin (19).
A base end of the boom is connected and supported, and a pin (21) is provided between the frame (12) and the fixed locking plate (20) in the middle of the boom (11).
Install the loader lift cylinder (23) through (22),
The boom (11) is appropriately moved up and down by the expansion and contraction operation of the cylinder (23).

Further, each swing pin (26) is attached to a fixed bracket (24) (25) which is a fixed mounting plate between the middle and the front end of the boom (11).
The base ends of the dump cylinder (28) and the dump arm (29) are supported via (27), and the tip ends of the cylinder (28) and the arm (29) are connected to each other via a pin (30). The tip of the arm (29) is interlockingly connected to the upper end of the rear portion of the bucket (10) via a pin (31), an upper hook arm (32) and a dump link (33). Then, the lower end of the rear portion of the bucket (10) is supported on the front end of the boom (11) via the pin (34) and the lower hook arm (35), and the bucket cylinder (28) is extended and retracted to move the bucket (10). The inclination is appropriately changed.

Further, as shown in FIG. 5, an obliquely upper opening notch (37) is formed on the intermediate front side of the rear mounting base (16) via the hook arm (36), and the upper end front side of the rear mounting base (16) is formed. A horizontal opening notch (38) is formed, and a pair of leg plates (39) (39) are integrally formed on the lower end side of the rear mounting frame (12), and the rear and lower sides are outwardly wide, and the rear legs are c-shaped in rear view. While forming the parts (40) (40) on the lower ends of the leg plates (39) (39),
Locking pins (41) (4) that engage with each notch (37) (38)
2) Fix horizontally between each leg plate (39) (39).

Then, the notch (3
After the pin (41) is engaged with 7), the rear mounting frame (12) is displaced around the pin (41) to engage the pin (42) with the notch (38). ) Tilt and detach the left and right rear mounting frames (12) (12) whose front ends are connected to the left and right mounting bases (16) (16) from the upper front side by the connecting pipe (43) only forward. It is configured to be freely engaged and fixed.

Further, as shown in FIGS. 6 to 9, while holding rod-shaped bodies (44), which are lock pins, are horizontally mounted between the lower ends of the left and right front mounting frames (14) (14), the front mounting base (17) ), A square tubular holding box (45) is integrally formed, and the box (4
The cam body (47) is rotatably installed in the 5) via the support shaft (46), and the rod-shaped body (44) is inserted from the lower side into the downward notch (48) of the lower surface of the box (45). When the rod body (44) comes into contact with the cam body (47) to rotate the cam body (47), the hook portion (49) of the cam body (47) is moved to the rod body (44).
The rod-shaped body (44) is grasped and supported by the cam body (47), and the front mounting frame (14) is attached to the front mounting base (17).
Is configured to be engaged and fixed from the lower side.

In addition, a square pole-shaped stopper block (50) that is dropped from above is provided in the gap between the cam body (47) and the inner surface of the box (45) generated when the rod-shaped body (44) is engaged, and the stopper block (50) of FIG. As described above, the stopper block (50) is sandwiched between the inner surface of the box (45) and the cam body (47), and the rod body (44) is fixedly supported on the front mount (43) by the cam body (47). is doing.

In addition, a stopper support plate (51) for engaging and supporting the stopper block (50) in the working (locking) position or the non-working (release) position is provided, and a U-shaped guide groove (52) and a guide pin (53) are provided. Support plate (51) on the outside of the box (45)
The stopper block (50) is connected to the support plate (51) via the L-shaped arm (54), and the stopper block (50) is attached to the front mount (43) via the support plate (51). ), The guide pin (53) is engaged with the U-shaped end of the guide groove (52), and the stopper block (50) is brought to the non-acting position by the support plate (51) as shown in FIG. On the other hand, as shown in FIG. 7, the U-shaped other end of the guide groove (52) is engaged with the guide pin (53), and the support plate (51) drops the stopper block (50) into the working position for support. It is configured to let. As apparent from the above, the front mounting frame (14) is connected to the rear mounting frame (12) for mounting the lift arm (11),
A cam block (47) for engaging and connecting the front mounting frame (14) is provided at the front part of the chassis (4) of the machine, and a stopper block (a stopper block for engaging and disengaging the cam block (47) in a detachable manner ( 50) is provided in the chassis (4) of the machine, and the front loader (14) and the cam body (47) are kept engaged by the stopper block (50). A notch (37) is provided in the middle of the rear mount (16) so that the lower end of the rear mount (16) is fixed and erected, and the notch (37) is opened obliquely upward to the front. (38) is provided on the upper end side of the rear mount (16), and each notch (37) is provided.
The rear mounting frame (12) is provided with locking pins (41) (42) for engaging and disengaging with the (38), and the rear notches (37) (38) at the upper and lower two places of the rear mounting base (16) are rear portions. Mounting frame (1
2) The upper and lower two locking pins (41) and (42) are engaged, and the conventional cam and stopper for locking the rear mounting frame (12) to the rear mounting base (16) are unnecessary, and the front portion is eliminated. Left and right of 2
The lift arm (11) can be removed by operating the stopper at some point.

Further, as shown in FIGS. 10 to 12, the bucket (10)
Attach the parallel brackets (55) (56) to the rear side,
The respective pins (31) (34) are integrally fixed between the brackets (55) (56), and a stopper pin (57) that abuts the rear ends of the brackets (55) (56) is attached to the upper hook arm (32).
Secured to the upper notch (58) of the upper hook arm (32)
With the pin (31) engaged with the dump link (33)
Is applied to the upper hook arm (32) to connect and fix the upper hook arm (32) to the brackets (55) (56).

Further, the lower hook arm (35) is rotatably connected to the tip of the boom (11) through the support shaft (59), and the pin (34) is engaged with the forward notch (60) of the lower hook arm (35). And a hook arm (61) for engaging and holding the pin (34) in the notch (60), and the lower hook arm (35) via the fulcrum shaft (62) so as to detachably engage the arm (61). The switch lever (63) for engaging and disengaging the hook arm (35) is integrally fixed to the fulcrum shaft (62).
By the operation, the hook arm (61) is engaged with the pin (34) and the lower hook arm (35) is engaged with and held by the pin (34).
The hook arm (61) is detached from the pin (34), the lower hook arm (35) is pulled out from the pin (34), and the bucket (10) is detached from the boom (11). .

This embodiment is configured as described above, and the lifting cylinder (2
3) is driven to swing the boom (11) up and down to lift the bucket (10), and the dump cylinder (28) is driven to swing the bucket (10) back and forth to rotate the tractor (1). Moves back and forth to scoop and load compost and earth and sand, while grounding the bucket (10) and moving the tractor (1) backwards to perform field leveling work on the bucket (10). is there.

When the front loader (9) is mounted on the tractor (1), the tractor (1) is moved forward in the state shown in FIG. 1 and the lifting cylinder (23) is contracted to lower the rear mounting frame (12). Let the notch (37) on the rear mount (16)
Guide the hook arm (36) to the front upper pin (41)
The frame (12) is displaced about the pin (41) to stand up, and the pin (42) is inserted into the notch (38) facing forward. Then, the frame (12) is fixed to the mount (16).

Then, by further reducing the lifting cylinder (23), the front attachment frame (14) is lifted to the ground, the holding rod-like body (44) rises, and the holding box (45) of the front attachment stand (17). ), The holding rod-shaped body (44) is engaged from the lower side into the downward notch (48) formed in (4), the cam body (47) is rotated by the rod-shaped body (44), and the hook portion (49) of the cam body (47) is rotated. ) Is engaged with the rod-shaped body (44) from the lower side, and the stopper block (50) is lowered to the operating position by the guide pin (53) detaching operation of the stopper support plate (51).
Then, as shown in FIG. 7, the stopper block (50) is dropped into the gap between the inner surface of the holding box (45) and the cam body (47), and the stopper support plate (51) is moved to the operating position by the guide pin (53). The cam body (47) is fixed by the stopper block (50), and the holding rod-shaped body (44) is grasped by the downward notch (48) and the hook portion (49).

The stopper block (50) can be fixed by fixing the stopper support plate (51) to the non-acting position with the guide pin (53).
By raising the cam, the cam body (47) returns to the position shown in FIG. 6 and the holding rod-like body (44) separates downward, and the elevating cylinder (23) extends so that the front mounting frame (14) descends to ground. At the same time, the pin (42) moves away from the notch (38), the rear mounting frame (12) is lifted above the mounting base (16), the pin (41) moves away from the notch (37), and the bucket (10) moves. The front loader (9) is removed from the tractor (1) with the left and right front mounting frames (14, 14) landing.

[Advantages of the Invention] As is apparent from the above embodiments, according to the present invention, the front mounting frame (14) is connected to the rear mounting frame (12) for mounting the lift arm (11), and the front of the chassis (4) A cam body (47) for engaging and coupling the front mounting frame (14) with a stopper, and a stopper (50) for engaging and disengaging the cam body (47) on the chassis (4) of the main body. , Stop the engagement between the front mounting frame (14) and the cam body (47) (5
In the mounting device of the front loader that is maintained by 0), the lower end of the rear mounting base (16) is fixed to the chassis (4) of the machine to stand upright, and the notch (37) that opens obliquely upward to the front is rear mounted. A notch (38) that is provided in the middle of the base (16) and opens to the front horizontal direction is attached to the rear mounting base (1).
Provided on the upper end side of 6), the notches (37) (3
The rear mounting frame (12) is provided with locking pins (41) (42) that can be engaged and disengaged with the rear mounting frame (1).
Since the upper and lower two locking pins (41) and (42) of the rear mounting frame (12) are engaged with the notches (37) and (38) located above and below 6), rear mounting to the rear mounting base (16) Frame (12)
It is possible to omit the conventional cams and stoppers that lock the lever, and to remove the lift arm (11) by operating the stoppers at the two left and right front parts, as well as the rear mounting frame (12) and the rear mounting base (16). It is possible to simplify the connection structure of (1) and improve the handling operability such as attachment / detachment operation and maintenance more easily than before.

[Brief description of drawings]

FIG. 1 is a side view of a main part showing an embodiment of the present invention, FIG. 2 is a side view of the whole, FIG. 3 is a side view of a front loader, FIG. 4 is a plan view of the same, and FIG. Partial rear view, FIGS. 6 and 7 are partial side views, FIG. 8 is a partial front view, FIG. 9 is a partial plan view, FIG. 10 is a bucket mounting explanatory diagram, and FIGS. 11 and 12 are It is the same top view. (1) …… Tractor (traveling vehicle) (10) …… Bucket (11) …… Boom (12) …… Rear mounting frame (14) …… Front mounting frame (16) …… Rear mounting base (17) ...... Front mount

Claims (1)

[Scope of utility model registration request] 1. A front mounting frame (14) is connected to a rear mounting frame (12) for mounting a lift arm (11), and the front mounting frame (14) is engaged with the front part of the chassis (4) of the machine. A cam body (47) to be connected is provided, and a stopper (50) which is engageably and disengageably engaged with the cam body (47) is provided on the chassis (4) of the main body, and the front attachment frame (14) and the cam body (14). In the mounting device of the front loader in which the engagement of (47) is maintained by the stopper (50), the lower end side of the rear mounting base (16) is fixed to the chassis (4) of the main body and is vertically installed, and is opened obliquely forward and upward. Notch (37) that allows the rear mount (1
A notch (38), which is provided in the middle of 6) and opens in the front horizontal direction, is provided on the upper end side of the rear mounting base (16) and engages with each notch (37) (38) in a detachable manner. A mounting device for a front loader, characterized in that locking pins (41, 42) are provided on a rear mounting frame (12).