JPH0124205Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a bucket dumping angle regulating device for regulating the amount of downward rotation of a bucket in a tractor shovel or a shovel loader (hereinafter referred to as a "loader").

Prior Art In a conventional loader, as shown in FIG. 5, the base end of a lift arm 7 is rotatably supported by a frame 3a, and is provided so as to be rotatable up and down by a lift cylinder 8. The bucket 9, which is pivotally connected to the dump arm 10 and the connecting rod 11, is
It is disposed so as to be rotatable in the vertical direction via.
The lift arm 7 also includes the dump arm 10.
A stopper 13 is provided in correspondence with the stopper 13, and by causing the dump arm 10 to collide with the stopper 13, the downward rotation of the bucket belt 9 is restricted, and the shock vibration caused by the collision (dump It was constructed so that dirt adhering to the bucket could be shaken off using a shovel.

However, in such a conventional loader, when the bucket 9 is tilted forward when discharging soil to a hopper at a high place, the bucket 9 hits the hopper before the dump arm 10 hits the stopper 13. Because there is a risk of damaging the bucket 9 and the hopper, the operator must move the control valve lever of the dump cylinder 12 slowly, stop the forward tilt just before the bucket 9 collides with the hopper, and perform soil removal work. . Therefore,
When discharging soil from a high place, the work efficiency is extremely low, the driver is highly fatigued, and the lack of a dump shock makes it difficult to remove the soil attached to the bucket 9.

Purpose of the invention The present invention has been made in view of the above-mentioned conventional situation, and it is an object of the present invention to provide a bucket dumping angle regulating device configured to easily change the forwardmost inclination angle of the bucket.

Structure of the invention The present invention has a stopper having a plurality of radially formed arms of different lengths, and the center of which is pivotally connected to the side wall of a lift arm, and the stopper has a plurality of rotating positions corresponding to each arm. A holding means capable of holding the bucket at the position shown in FIG.

Embodiments Specific embodiments of the present invention will be described below with reference to the drawings of FIGS. 1 to 4. In FIG. 1, A indicates a main body, and B indicates a loader mechanism provided at the front of the main body A. And in the main body A, 1
2 is a front tire, 2 is a rear tire, and 3 is a frame mounted on both tires 1 and 2. The frame 3 includes a rear frame 3b and a rear frame 3b.
The front frame 3a is rotatably connected to the front frame 3a via a center pin 3c, and a head guard 4 is provided upright on the rear frame 3b, and a driver's cab 5 is provided within the head guard 4. Further, an engine (not shown) is mounted on the rear frame 3b, located behind the driver's cab 5, and a hood 6 covers the engine.

On the other hand, the aforementioned loader mechanism B is attached to the front frame 3a. The loader mechanism B consists of a pair of left and right lift arms 7 whose intermediate portions are connected by a tie beam (not shown) and a bucket belt 9, and the lift arms 7 extend between the intermediate portions of the lift arms 7 and the front frame 3a. It is pivotally connected to the front frame 3a via a lift cylinder 8 located therein so as to be freely rotatable in the vertical direction. At the tip of the lift arm 7, a dump arm 10 is located in the middle of the lift arm 7, and the dump arm 10 and the bucket 9 are rotatably connected.
The dump cylinder 12 extends between the dump arm 10 and the front frame 3a. The lift arm 7 also has a stopper 1 located in front of the dump arm 10.
3 is provided. That is, as shown in FIG. 2, the stopper 13 is formed into a disc shape having a plurality of arms 13a, 13b, and 13c radially different in length, and the length of each arm is such that arm 13a<arm 1.
3b<arm 13c. The center portion is rotatably attached to a pin 14 fixed to the lift arm 7 via a bush 15, as shown in FIG. 3, and is locked by a snap ring 20. Furthermore, the holding means for holding the rotational position of the stopper 13 includes a ball 17 fitted into an insertion hole 16 formed in the lift arm 7, a spring 18 that urges the ball 17 toward the stopper 13, and a spring 18 that urges the ball 17 toward the stopper 13. The stopper 13 is made up of a plurality of spherical recesses 19 provided corresponding to each arm of the lift arm 7. When the ball 17 fits into one of the recesses 19, the stopper 13
Fixed against.

Next, the operation of the present invention will be explained. When the loader mechanism B is in the state shown by the solid line in FIG. At the same time, by rotating the lift arm 7 in the upward direction via the lift cylinder 8, the loader mechanism B is brought into a state shown by a chain line, that is, a state in which it can be transported. In such a state, the earth and sand are transported to a predetermined position, such as the loading platform of a dump truck, and the dump cylinder 12 is
By extending the piston rod and rotating the dump arm 10 forward to the position where it collides with the stopper 13, the function of discharging earth and sand accompanied by a dump shock can be obtained. To be more specific, the most forward tilting angle of the bucket can be changed depending on the holding position of the stopper 13. For example, the dump arm 10 can collide with the arm 13b of the stopper 13 as shown by the solid line in FIG. Depending on the state in which the arm 10 collides with the arm 13a of the stopper 13, the most forward inclination angle of the bucket can be changed arbitrarily to obtain a discharge action to a high place accompanied by a dump shock. The most forward tilt angle of the bucket when the dump arm 10 collides with the arm 13a is set to be approximately the same as the most forward tilt angle of the conventional device. Therefore, when unloading work to a low place, that is, unloading work using a small dump truck, etc., the stopper should be set so that the largest forward tilt angle of the bucket can be obtained, that is, the arm 13a is in contact with the dump arm 10. 13 and carry out the work.On the other hand, when discharging soil to a hopper at a high place, that is, when the bucket 9 is tilted forward, the dump arm 10 moves into the arm 1 of the stopper 13.
If the bucket 9 hits the hopper before hitting the hopper, set the arm 13b or arm 13c of the stopper 13 so that it hits the dump arm 10 depending on the height of the hopper, and the bucket 9 will hit the hopper. The dump arm 10 collides with the stopper 13 before the collision occurs, and the forward tilting of the bucket cart 9 is stopped, and a discharge action accompanied by a dump shock can be obtained.

The stopper 13 is attached to the arm 1 as shown in Fig. 3.
The ball 17 is biased by a spring 18 and fitted into a spherical recess 19 provided corresponding to the arm 3a, thereby restricting its rotation.When changing the arm, by forcefully turning the stopper 13, the ball 17 can be moved to the other arm. The ball 17 fits into a similarly provided spherical recess, stops rotating, and can be set.

Effects of the invention As mentioned above, the most forward inclination angle of the bucket can be adjusted using a stopper with multiple arms of different lengths, so there is no danger of the bucket hitting the hopper when discharging soil from a hopper in a high place. This eliminates the need to adjust the forward tilt of the bucket using the control valve lever, greatly improving work efficiency.Also, when adjusting the control valve, the dump arm could not collide with the stopper, making it impossible to obtain a dump shock. In this invention, a dump shovel is always available, so it has excellent effects such as being able to easily remove soil stuck to the bucket.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the whole of a tractor shovel equipped with a bucket dump stopper according to the present invention, Fig. 2 is a side view of main parts, Fig. 3 is a sectional view taken along the line - FIG. 4 is a side view of the loader mechanism for explaining the operation of the present invention, and FIG. 5 is a side view of the loader mechanism showing the conventional structure. 3a...Front frame, 7...Lift arm, 8...Lift cylinder, 9...Bucket,
10... Dump arm, 11... Connecting rod, 12... Dump cylinder, 13... Stopper, 17... Ball, 18... Spring, 19... Spherical recess.

Claims (1)

[Claims for Utility Model Registration] (1) A lift arm whose base is pivotally connected to the front frame is raised and lowered by a lift cylinder extending between the front frame and the lift arm. A dump arm that is freely provided and has a bucket pivotally connected to the tip of the lift arm and a bucket that is pivotally connected to the middle part of the lift arm, and a dump cylinder that is provided so as to extend between the dump arm and the front frame. and a shovel loader configured to be freely rotatable in the vertical direction by means of a connecting rod connecting the dump arm and the bucket cart, wherein a plurality of shafts of different lengths are provided to restrict the amount of forward rotation of the dump arm. A stopper having radially formed arms is pivotally connected to the side wall of the lift arm, and a holding means capable of holding the stopper at a plurality of positions corresponding to the plurality of arms is provided in the lift. A bucket dumping angle regulating device for a shovel loader, characterized in that the device is disposed between an arm and the stopper. (2) The holding means includes a ball that is biased and fitted into the side wall of the lift arm, and a spherical recess that is formed at a position corresponding to the plurality of arms of the stopper and in which the ball is locked. A bucket dumping angle regulating device for a shovel loader according to claim 1 of the above-mentioned utility model registration claim.