JP2022162351A - Working machine - Google Patents

Abstract

To facilitate efficient discharge and operation of an object, such as snow removal work, and to enable continuous work.SOLUTION: A working part 3 consists of a working part body 4 pivoted to be pivoted in the vertical direction by a fulcrum shaft 8. The working part body 4 is formed in an arc shape with a lower-part 4b formed almost linearly and an upper part 4a curved inward in the reverse running direction, and the distance L1 between the fulcrum shaft 8 and the upper-end 4c of the working part body 4 is greater than the distance L2 between the fulcrum shaft 8 and the lower-end 4e of the working part body 4. When the working part body 4 is raised, the lower- end 4e tilts forward due to the weight of snow S accumulated in the working part body 4. When the working part body 4 is raised further, the weight of the snow S moved downward causes the body to swing further forward, resulting in a discharge posture. The transition from the extrusion posture to the discharge posture is made continuously. In the discharge posture, the lower-part 4b is in the standing state and the upper-part 4a is curved in an arc shape, so that the snow S does not scatter as it comes out of the work part body 4 in the standing state.SELECTED DRAWING: Figure 4

Description

TECHNICAL FIELD The present invention relates to a work machine that pushes out and discharges objects such as snow and sand.

A snow blower will be described as an example. Conventionally, for example, a support frame that swings up and down around an axis extending in the width direction of the traveling body with respect to the traveling body, a blade supported at the front part of the support frame, and a rear part of the body from the support frame The snow blower is provided with an operating handle that extends so as to be capable of swinging integrally with the blade, and the blade portion is swung up and down by the vertical swinging operation of the support frame by the operating handle, and the snow blower takes a lowered work posture and a raised discharge posture. Proposed.
In such a snowplow, a locking pin allows the blade portion to swing to a working angle and a discharge angle. Further, a release operation tool for manipulating the lock pin is provided, and the lock pin is operated by the release operation tool.

In such a snow remover, the snow is removed by moving the traveling body forward and pushing away the snow forward with the blade portion. This remaining snow on the blades reduces the amount of snow that the blades can hold when they move forward again to push the snow away.

In addition, when moving in reverse, the pushed snow and the snow remaining on the blade crumble and scatter on the work surface after the snow removal work, which hinders efficient snow removal work.

Furthermore, in order to reversely turn the blade portion, it is necessary to operate the lock pin with the release operation tool, which is troublesome for the operator.

In addition, when the blade portion is turned over forward, the front end of the blade portion moves backward, so that the snow is discharged to the place pushed away by the blade portion. work efficiency is poor.

JP 2011-231454 A

SUMMARY OF THE INVENTION In view of the above background, an object of the present invention is to efficiently discharge objects such as snow removal work.

Another object of the present invention is to facilitate operation and enable continuous work.

In order to solve the above problems, a working machine according to claim 1 of the present invention is a working machine provided with a working part that is attached to a traveling machine and performs an operation of pushing out and ejecting an object, wherein the working part is mounted on a fulcrum shaft. The main body of the working part is pivotally mounted so as to be able to turn in the vertical direction. It is characterized in that the distance L1 between the shaft and the upper end of the working section main body is greater than the distance L2 between the fulcrum shaft and the lower end of the working section main body.
Further, the working machine according to claim 2 of the present invention is the working machine according to claim 1, wherein the distance L1 between the fulcrum shaft and the upper end of the working section main body is the distance between the fulcrum shaft and the lower end of the working section main body. is three times the distance L2 between
Further, the work machine according to claim 3 of the present invention is the work machine according to claim 1 or claim 2, wherein the upper part of the working part main body faces forward and the lower part tilts rearward from the pushing posture, and the upper part faces downward. It is characterized in that it continuously operates in a discharge posture in which the lower part stands up.
Further, the working machine according to claim 4 of the present invention is the working machine according to any one of claims 1 to 3, wherein the working part main body is attached to the machine body via an elastic body that is biased toward the machine body side of the traveling machine. It is characterized by being connected.
Further, the working machine according to claim 5 of the present invention is the working machine according to any one of claims 1 to 4, wherein a turning motion of the working part main body at the time of discharge posture is provided in the vicinity of the lower end of the working part main body. It is characterized by providing a restricting stopper.

Due to the shape of the blade in which the upper part of the working part main body is curved inward in an arc shape and the lower part is formed in a straight shape, snow is removed from the blade without being scattered during the snow removal work. Therefore, the snow is discharged without losing its shape, and the object can be discharged efficiently.

Further, in the snow removing operation, the shift of the working portion main body from the pushing posture to the discharging posture is continuously performed using the self weight of the snow. Therefore, the operation is easy, and the object can be discharged continuously.

1 is a side view of a work machine according to the present invention; FIG. FIG. 2 is a plan view of FIG. 1; FIG. 3 is an enlarged view of part of FIG. 2 viewed from III. FIG. 2 is an enlarged view of part IV of FIG. 1; FIG. 4 is a diagram showing the steps of the operation of the work machine according to the present invention, (a) is the step of the pushing posture, (b) is the step of the front ejection posture, (c) is the step of the ejection posture, and (d) is the step of the rear ejection posture. indicate the steps. It is a principal part enlarged view of FIG.5(c).

Next, a working machine according to the present invention showing an embodiment will be described in more detail. For the sake of convenience, parts having the same functions are denoted by the same reference numerals, and descriptions thereof are omitted.

1 to 5, the working machine 1 comprises a traveling body 2, a blade portion 3 provided in front of the traveling body 2, and a handle 9. As shown in FIGS. That is, the blade portion 3 is pivotally attached to a lifting arm 10 connected to a support frame 11 made of a plate-like body so as to be able to turn vertically on a fulcrum shaft 8 . The lifting arm 10 is attached to the traveling body 2 and integrally fixed and connected to another support frame 12 . Both the lifting arm 10 and the support frame 12 are made of round pipes, and the support frame 12 has a handle 9 formed at its rear end. The traveling body 2 is provided with traveling portions 13 on both sides of a body frame 15 along the traveling direction, and a battery 16 is provided on the body frame 15 . The traveling portion 13 has a driving wheel 13a as a front wheel and a driven wheel 13b as a rear wheel, and a crawler belt 13c is stretched between the two wheels. A drive motor 14 is arranged on the drive wheel 13a. A fulcrum shaft 17 of the lifting arm 10 is provided between the two wheels.

The blade portion 3 includes a blade 4, side plates 5 provided on both sides of the blade 4 in the running direction, and a scraper 6 provided at the lower end portion 4e of the blade 4. As shown in FIG. The blade 4 has an arcuate upper portion 4a that is curved inward in the direction opposite to the running direction, and a lower portion 4b that is substantially straight. That is, the inner curved shape of the blade 4 is a special shape, and the upper end 4c to the central portion 4d are formed in an arc shape, and the central portion 4d to the lower end 4e are formed in a substantially linear shape. A rib 7 is attached to the blade 4 , and the fulcrum shaft 8 is provided at a lower end portion 7 a of the rib 7 located outside the lower end portion 4 e of the blade 4 . The fulcrum shaft 8 pivotally attaches the blade 4 to the lifting arm 10 and the support frame 11 so as to be able to rotate in the vertical direction. Reference numeral 19 denotes an elastic body 19 biased toward the traveling machine body 2 side, and stretched between the support frame 11 and the rib 7 . A stopper receiver 20 is formed by flatly notching the lower end of the rib 7, and a stopper 21 provided at the lower portion of the support frame 11 is brought into contact with the stopper receiver.

The dimensional ratio of the blade 4 is specially formed so that the distance L1 between the fulcrum shaft 8 and the upper end portion 4c (hereinafter abbreviated as "L1 length") is the distance L2 between the fulcrum shaft 8 and the lower end portion 4e. hereinafter abbreviated as "L2 length"). In this embodiment, L1=300 mm and L2=100 mm, and the former length L1 is three times longer than the latter length L2. This dimensional ratio maxima causes the L1 length to be significantly greater than the L2 length. Specifically, when the L1:L2 length ratio is about 3:2, it is necessary to move the handle 9 up and down greatly to rotate the blade 4 greatly upward. becomes large and burdens the workers. On the other hand, if the L1:L2 length ratio is about 4:1, when the lift arm 10 is lifted, the weight of the snow S on the upper part of the blade 4 is excessively increased toward the support frame 11 behind the fulcrum shaft 8. load. Therefore, even if the elevating arm 10 is lifted upward, the blade 4 cannot shift from the pushing posture to the discharging posture, and the snow S cannot be discharged from the blade 4.例文帳に追加

Next, based on FIG. 5, each process operation of the working machine according to the present embodiment will be described.

First, the scraper 6 of the blade portion 3 is grounded on the working surface G, and the travel machine 2 is advanced. At this time, the scraper 6 is pushed forward with its upper portion facing forward and its lower portion tilted backward. As the fuselage moves forward, snow S accumulates inside and in front of the inner curved portion of the blade 4 (Fig. 5(a)).

When a certain amount of snow S accumulates on the blade portion 3, an operator (not shown) pushes the handle 9 downward to raise the elevating arm 10, thereby moving the blade portion 3 upward (FIG. 5(b)).

Here, let's look at the blade portion 3 immediately after the lifting arm 10 is lifted. Since the distance L1 between the fulcrum shaft 8 of the blade 4 and the upper end 4c is sufficiently large relative to the distance L2 between the fulcrum shaft 8 and the lower end 4e, the upper end 4c moves greatly forward. . As a result, the snow S on the upper portion 4a of the blade 4 is moved forward.

In addition, the gravity of the snow S accumulated on the blade 4 acts on the lower end portion 4e of the blade 4 to move it downward about the fulcrum shaft 8, thereby rotating the blade 4. As shown in FIG. Since the scraper 6 is provided at the lower end portion 4e of the blade 4, when the scraper 6 comes into contact with the work surface G, the turning motion is restricted.

When the lift arm 10 is further raised, the upper end portion 4c moves forward from the central portion 4d, and the upper portion 4a faces downward while the lower portion stands upright (FIG. 5(c)). Due to this discharge posture, the snow S on the upper portion 4a is separated from the upper portion 4a and falls downward (FIG. 5(c)).

At this time, since the lower portion 4b is formed in a substantially linear shape, the discharged snow S moves downward and leaves the blade 4 in an upright state.

When the blade portion 3 in the discharging posture is further raised, the lower end portion 4e and the scraper 6 are separated from the work surface G, so that the discharged snow S does not protrude backward, and the snow discharged by the scraper 6 and the like accompanying discharge is removed. prevent scraping or scattering of This completes the snow removal work.

Next, the traveling body 2 is moved backward. Then, since the blade 4 is urged toward the travel machine 2, it is released from the weight of the snow S, and the force of the elastic body 19 restores the working posture shown in FIG. If the snow removal work is to be continued further, the lifting arm 10 lowers the blade 4 to the original position shown in FIG.

Each of the steps described above and the operation of the blade 4 will now be examined in detail.
When pushing out snow S or the like, the posture (push posture) of the blade portion 3 is such that the scraper 6 provided at the lower end portion 4e is in contact with the work surface G (FIG. 5(a)). When the snow S or the like is discharged, the posture (discharging posture) of the blade portion 3 is such that the lower portion 4b, that is, the lower end portion 4e to the central portion 4d of the blade portion 3 are upright (FIG. 5(c)).

5(a) to FIG. 5(c), when the blade 4 is lifted, the weight of the snow S accumulated on the blade 4 causes the lower end 4e to tilt forward (FIG. 5(b)), When the blade 4 is further raised, the weight of the snow S that has moved downward causes the blade 4 to swing further forward, resulting in a discharge posture. That is, the transition from FIG. 5(a) to FIG. 5(c) is made continuously.

In FIG. 5(c), the fulcrum shaft 8 is arranged near the lower end 4e, so when the blade 4 is turned and takes the discharge posture, the lower part 4b is in an upright state and the lower end 4e contacts the work surface G. Since this restricts the turning of the blade 4, the snow S is not discharged behind the lower end 4e.

This point will be specifically described. When the blade 4 is further raised, the shape of the blade 4, in which the upper part 4a is curved inward in an arc shape and the lower part 4b is formed in a linear shape, the snow S is scattered from the blade 4 in an upright state. There is no Therefore, the snow S is discharged without breaking the shape in which it is discharged in an upright state. In this embodiment, the lower end of the rib 7 fixed to the blade 4 is provided with a stopper receiver 20 against which the stopper 21 abuts. Further pivoting movement of the blade 4 is prevented. Therefore, scattering of the discharged snow S due to an unexpected turning motion of the upper portion 4a of the blade 4 is prevented.

Since the lower end portion 4e is in contact with the work surface G during snow removal work, the blade 4 does not swing even if the load of the snow S is applied to the blade 4. - 特許庁

According to the present embodiment, since the length L1 is sufficiently larger than the length L2, it is possible to perform the operations of the respective steps continuously, and the discharged snow S does not scatter, and the snow can be removed in an upright state. make it possible. By repeating a series of steps in this manner, continuous work can be performed, and work efficiency is improved.

The present invention is not limited to the above embodiments. For example, although the above embodiment is applied to a walking-type working machine, it can also be applied to a self-propelled working machine.

Moreover, the working machine according to the present invention can be applied not only to removing snow but also to objects such as earth and sand whose discharge posture is indeterminate.

Furthermore, even if the distance L1 between the fulcrum shaft 8 and the upper end portion 4c is about twice the distance L2 between the fulcrum shaft 8 and the lower end portion 4e, the above effects can be obtained. The lifting arm 10 and the handle 9 are formed from an integral support frame in the above embodiment, which enables simplification of the structure, reduction in the capacity of the power source, reduction in cost, prevention of failures, and the like. However, even if the two members are separate members, it is sufficient that the blade portion 3 rotates as the elevating arm 10 moves up and down. Specifically, in the case of automatic travel or remote control, the manually operated steering wheel 9 can be dispensed with. Further, when the lift arm 10 is driven up and down by a motor, a cylinder, or the like, the handle 9 does not need to be moved up and down.

INDUSTRIAL APPLICABILITY The present invention can be used for snow removal work and earth and sand discharge work.

1 working machine 2 traveling machine 3 blade part 4 blade 4a upper part 4b lower part 4c upper end part 4d center part 4e lower end part 5 side plate 6 scraper 6a front edge part 7 rib 8 fulcrum shaft 9 handle 10 lifting arm 11 support frame 12 support frame 13 traveling Part 13a Drive wheel 13b Driven wheel 13c Crawler belt 14 Motor 15 Body frame 16 Battery 17 Lifting arm fulcrum shaft 19 Elastic body 20 Stopper receiver 21 Stopper G Work surface S Snow

Claims (5)

A working machine provided with a working part that is attached to a traveling machine and performs pushing work and discharging work of an object,
The working part consists of a working part main body that is pivotally mounted on a fulcrum shaft so as to be able to rotate in the vertical direction,
The working portion main body has a lower portion formed in a substantially linear shape and an upper portion formed in an arc shape curved inwardly in the direction opposite to the traveling direction,
A working machine, wherein a distance L1 between the fulcrum shaft and the upper end of the working section main body is greater than a distance L2 between the fulcrum shaft and the lower end of the working section main body. The working machine according to claim 1, wherein the distance L1 between the fulcrum shaft and the upper end of the working section main body is three times the distance L2 between the fulcrum shaft and the lower end of the working section main body. A work machine characterized by: In the working machine according to claim 1 or claim 2, the working unit main body continuously moves from a pushing posture in which the upper portion faces forward and the lower portion tilts backward, to a discharging posture in which the upper portion faces downward and the lower portion stands upright. A work machine characterized by: 4. The working machine according to claim 1, wherein said working section main body is connected to said traveling machine via an elastic body that is biased toward said machine body. The working machine according to any one of claims 1 to 4, wherein a stopper is provided in the vicinity of the lower end portion of the working section main body for restricting the turning movement of the working section main body in the ejecting posture. working machine.

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