Work equipment

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]

[0001] The present invention relates to a work machine that pushes and discharges objects such as snow, earth, and sand. [Background technology]

[0002] A snowplow will be taken as an example for explanation. Conventionally, for example, a snowplow has been proposed that includes a support frame that swings up and down around an axis extending in the width direction of the traveling body relative to the traveling body, a blade supported on the front part of the support frame, and an operating handle that extends from the support frame to the rear of the body so as to be able to swing integrally therewith, and in which the blade is operated to swing up and down by operating the operating handle to swing the support frame up and down, thereby taking a lowered working position and an raised discharge position. In this type of snow removal machine, the lock pin allows the blade to swing between the working angle and the discharge angle, and a release tool is provided for manually operating the lock pin, which is used to operate the lock pin.

[0003] In this type of snowplow, the running body is moved forward and the blade pushes the snow forward to remove it, so when the blade is raised while moving backwards, snow remains on the blade. When the snowplow moves forward again to push the snow away, the amount of snow that the blade can hold is reduced due to the snow remaining on the blade.

[0004] In addition, when reversing, the pushed-aside snow and the snow remaining on the blade sometimes collapse and scatter onto the work surface after the snow removal work is completed, making it difficult to carry out snow removal work efficiently.

[0005] Furthermore, in order to rotate the blade portion in the reverse direction, it is necessary to operate the lock pin with a release tool, which poses the problem that the operation is troublesome for the operator.

[0006] In addition, when the blade is flipped forward, the front end of the blade moves backward, causing snow to be discharged into the area that was previously pushed aside by the blade. This means that the work surface cannot be cleanly cleared, contrary to the operator's intentions, and work efficiency is poor. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2011-231454 A Summary of the Invention [Problem to be solved by the invention]

[0008] In view of the above background, the present invention has an object to efficiently remove objects during snow removal and other such operations.

[0009] Another object is to make the operation easy and to enable continuous work. [Means for solving the problem]

[0010] In order to solve the above problems, the working machine described in claim 1 is a working machine provided with a working unit that is attached to a traveling unit and performs the work of pushing and discharging an object, the working unit is composed of a working unit main body that is pivotally attached so as to be rotatable in the vertical direction by a fulcrum shaft, the lower part of the working unit main body is formed in a substantially straight line shape so that the lower end to the center part is in an upright state when the working unit main body is in a pushing-out position due to the turning, and the upper part is formed in an arc shape that is inwardly curved in the counter-traveling direction, and the distance L1 between the fulcrum shaft and the upper end of the working unit main body is set to be equal to or larger than the fulcrum shaft. Working section For the distance L2 between the lower end of More than 1.5 times but less than 3 times The working unit body is formed to have a size of 10 mm, and an elastic body that is biased toward the body of the traveling machine is provided at the bottom of the working unit body, and the working unit body is connected to the body via the elastic body. Furthermore, the working section has a lower end that contacts the working surface during the pushing operation, and a lower portion that stands up during the discharging operation, so that the lower end is brought into contact with the working surface to prevent the object from being discharged rearward from the lower end. It is characterized by the above. Moreover, in the working machine described in claim 1, the distance L1 between the fulcrum shaft and the upper end of the working unit body is three times the distance L2 between the fulcrum shaft and the lower end of the working unit body. In addition, in the working machine described in claim 1 or claim 2, the working unit body is characterized in that it moves continuously from a push-out position in which the upper part faces forward and the lower part tilts backward to a discharge position in which the upper part faces downward and the lower part stands up. In the working machine according to any one of claims 1 to 3, a stopper is provided near the lower end of the working body for restricting the turning movement of the working body when in the discharge position. Effect of the Invention

[0011] The blade shape, with the upper part of the working body curved inward in an arc shape and the lower part formed in a straight line, allows snow to pass through the blade without scattering during snow removal work. Therefore, snow is removed without losing its shape when it is removed, allowing the target object to be removed efficiently.

[0012] In addition, during snow removal, the working unit body can be moved continuously from the pushing position to the discharging position by utilizing the weight of the snow, making operation easy and allowing the objects to be continuously discharged. [Brief description of the drawings]

[0013] [Figure 1] 1 is a side view of a working machine according to the present invention. [Diagram 2] FIG. 2 is a plan view of FIG. [Diagram 3] FIG. 3 is an enlarged view of a portion taken along line III in FIG. 2. [Figure 4] FIG. 2 is an enlarged view of part IV in FIG. [Diagram 5] 1A shows the steps of the operation of the working machine according to the present invention, where (a) shows the step in the push-out position, (b) shows the step in the front discharge position, (c) shows the step in the discharge position, and (d) shows the step in the rear discharge position. [Figure 6] FIG. 5(c) is an enlarged view of a main part of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Next, a working machine according to the present invention will be described in more detail, showing an embodiment thereof. For convenience, parts having the same functions are given the same reference numerals and their description will be omitted.

[0015] 1 to 5, the working machine 1 comprises a traveling body 2, a blade unit 3 provided in front of the traveling body 2, and a handle 9. That is, the blade unit 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 vertically rotatable at a fulcrum shaft 8. The lifting arm 10 is attached to the traveling body 2, and is fixed and connected integrally to another support frame 12. The lifting arm 10 and the support frame 12 are both 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 a traveling unit 13 on both sides of a machine frame 15 along the traveling direction, and a battery 16 is provided on the machine frame 15. The traveling unit 13 has a driving wheel 13a on the front wheel and a driven wheel 13b on the rear wheel, and a crawler belt 13c is stretched between the two wheels. A drive motor 14 is provided on the driving wheel 13a. In addition, a fulcrum shaft 17 of the lifting arm 10 is provided between both wheels.

[0016] The blade section 3 is composed of a blade 4, side plates 5 provided on both sides of the blade 4 in the traveling direction, and a scraper 6 provided at the lower end 4e of the blade 4. The upper part 4a of the blade 4 is formed in an arc shape curved inward in the direction opposite to the traveling direction, and the lower part 4b is formed in an approximately straight line. That is, the inward curve shape of the blade 4 is a special shape, and the upper end 4c to the central part 4d is formed in an arc shape, and the central part 4d to the lower end 4e is formed in an approximately straight line. A rib 7 is attached to the blade 4, and the fulcrum shaft 8 is provided at the lower end 7a of the rib 7 located outside the lower end 4e of the blade 4. The fulcrum shaft 8 pivots the blade 4 to the lifting arm 10 and the support frame 11 so as to be vertically rotatable. 19 is an elastic body 19 biased toward the traveling machine body 2, and is hung between the support frame 11 and the rib 7. Reference numeral 20 denotes a stopper receiver formed by cutting out the lower end of the rib 7 into a flat shape, against which a stopper 21 provided on the lower part of the support frame 11 comes into contact.

[0017] The dimensional ratio of the blade 4 is specially formed, and the distance L1 between the fulcrum shaft 8 and the upper end 4c (hereinafter, abbreviated as "L1 length") is The front edge 6a of the scraper 6 The length L2 between the lifting arm 10 and the blade 4 is set to be the maximum of the distance L2 (hereinafter, abbreviated as "L2 length"). In this embodiment, L1=300 mm, L2=100 mm, and the former length L1 is three times longer than the latter length L2. The maximum of this dimension ratio is set so that the length L1 is sufficiently larger than the length L2. Specifically, if the ratio of the lengths L1:L2 is about 3:2, the handle 9 needs to be moved up and down significantly to rotate the blade 4 upwards, so the operator's movement for lifting and lowering the blade becomes large, which places a burden on the operator. On the other hand, if the ratio of the lengths L1:L2 is about 4:1, when the lifting arm 10 is raised, an excessive load is applied to the support frame 11 side behind the fulcrum shaft 8 out of the weight of the snow S on the upper part of the blade 4. Therefore, even if the lifting arm 10 is raised upwards, the blade 4 cannot move from the pushing position to the discharging position, and the snow S cannot be discharged from the blade 4.

[0018] Next, each process operation of the work machine according to this embodiment will be described with reference to FIG.

[0019] First, the scraper 6 of the blade unit 3 is placed on the work surface G, and the traveling machine 2 is moved forward. At this time, the scraper 6 is in a pushing position with its upper part facing forward and its lower part tilted backward. As the machine body moves forward, snow S accumulates inside and in front of the inner curved part of the blade 4 (Figure 5(a)).

[0020] When a certain amount of snow S has accumulated on the blade portion 3, an operator (not shown) pushes the handle 9 downward to raise the lifting arm 10, thereby moving the blade portion 3 upward (FIG. 5(b)).

[0021] Here, let us look at the blade unit 3 immediately after the lift arm 10 is raised. The distance L1 between the fulcrum shaft 8 and the upper end 4c of the blade 4 is The front edge 6a of the scraper 6Since the distance L2 between the upper end 4c and the snow S is sufficiently large, the upper end 4c moves forward by a large amount. As a result, the snow S on the upper portion 4a of the blade 4 is moved forward.

[0022] Furthermore, a downward moment acts on the lower end 4e of the blade 4 around the fulcrum axis 8 due to the gravity of the snow S accumulated on the blade 4, causing the blade 4 to rotate. Note that, since a scraper 6 is provided on the lower end 4e of the blade 4, the rotational movement is restricted when the scraper 6 comes into contact with the working surface G.

[0023] When the lifting arm 10 is further raised, the upper end 4c moves forward from the center 4d, and the upper part 4a faces downward while the lower part stands up, assuming a discharge posture (FIG. 5(c)). In this discharge posture, the snow S on the upper part 4a separates from the upper part 4a and falls downward (FIG. 5(c)).

[0024] At this time, since the lower portion 4 b is formed in a substantially straight line, the discharged snow S moves downward while remaining in an upright state, and is separated from the blade 4 .

[0025] When the blade portion 3 in the discharge position is further raised, Blade 4 Lower end 4e and Scraper 6 and the front edge 6a As the scraper 6 and the like separate from the work surface G, the discharged snow S does not protrude backward, preventing the discharged snow from being scraped off or scattered by the scraper 6 and the like during discharge. This completes the snow removal work.

[0026] Next, the traveling body 2 is moved backward. Then, since the blade 4 is biased toward the traveling body 2, it is released from the weight of the snow S and returns to the working position shown in Fig. 5(d) by the force of the elastic body 19. If snow removal work is to be continued, the lifting arm 10 is used to lower the blade 4 to the original position shown in Fig. 5(a) and work is continued.

[0027] Here, each of the above steps and the operation of the blade 4 will be considered in detail. When pushing out snow S or the like, the position (pushing out position) of the blade portion 3 is changed by the scraper 6 provided at the lower end portion 4e. The front edge 6a When the work is performed to remove snow S or the like, the position of the blade portion 3 (discharge position) is such that the lower portion 4b, i.e. The front edge 6a of the scraper 6 From the center portion 4d of the blade portion 3, the blade portion 3 stands up (FIG. 5(c)).

[0028] The transition from Figure 5(a) to Figure 5(c) occurs when the blade 4 is raised due to the weight of the snow S accumulated on the blade 4. The front edge 6a of the scraper 6 When the blade 4 is further raised, the weight of the snow S that has moved downward causes the blade 4 to further rotate forward and assume the discharge posture. In other words, the transition from Figure 5(a) to Figure 5(c) is made continuously.

[0029] In FIG. 5(c), the fulcrum shaft 8 is disposed near the lower end 4e, so that when the blade 4 is rotated to the discharge position, the lower portion 4b is in an upright position. The front edge 6a of the scraper 6 comes into contact with the working surface G. This limits the rotation of the blade 4, The lower end, i.e. the front edge 6a of the scraper 6 Snow S is not discharged further back.

[0030] This point will be described in detail. When the blade 4 is further raised, the upper part 4a is curved inwardly in an arc shape and the lower part 4b is formed in a straight line, so that the snow S does not fall out of the blade 4 in an upright state and scatter. Therefore, the snow S is discharged without losing the shape it was in when it was discharged standing up. In this embodiment, the stopper receiver 20 with which the stopper 21 abuts is provided at the lower end of the rib 7 fixed to the blade 4, so that when the stopper 21 abuts against the stopper receiver 20, further rotation of the blade 4 in the discharge position is prevented. Therefore, scattering of the discharged snow S due to unexpected rotation of the upper part 4a of the blade 4 is prevented.

[0031] During snow removal work, The front edge 6a of the scraper 6 Since the blade 4 is in contact with the working surface G, the blade 4 does not rotate even if a load of snow S is applied to the blade 4.

[0032] According to this embodiment, since the length L1 is sufficiently longer than the length L2, the above steps can be performed continuously, and the discharged snow S does not scatter, making it possible to remove snow in an upright position. By repeating a series of steps in this way, continuous work can be performed, improving work efficiency.

[0033] The present invention is not limited to the above-described embodiment. For example, although the above embodiment is applied to a walking type work machine, the present invention can also be applied to a self-propelled work machine.

[0034] Furthermore, the working machine according to the present invention can be used not only for removing snow, but also for removing objects such as soil and sand that have an irregular shape when being discharged.

[0035] Furthermore, the distance L1 between the fulcrum shaft 8 and the upper end 4c is The front edge 6a of the scraper 6 The above-mentioned effects can be achieved even if the distance between the lifting arm 10 and the handle 9 is about twice the distance L2 between the lifting arm 10 and the handle 9. In the above embodiment, the lifting arm 10 and the handle 9 are configured from an integrated support frame, which allows for a simplified configuration, a smaller power supply capacity, lower costs, and prevention of breakdowns. However, even if the two components are separate, it is sufficient that the blade section 3 rotates in response to the lifting arm 10 moving up and down. Specifically, in the case of automatic travel or remote control, the handle 9 to be manually operated can be made unnecessary. Also, when the lifting arm 10 is driven to move up and down by a motor, cylinder, etc., the handle 9 does not need to move up and down. [Industrial Applicability]

[0036] The present invention can be used for snow removal and soil removal work. [Explanation of symbols]

[0037] 1 Work equipment 2 Running machine 3 Blade section 4 Blades 4a Upper 4b Lower part 4c Upper end 4d central part 4e Bottom end 5 Side Panel 6 Scraper 6a Leading edge 7. Ribs 8 Pivot Axis 9 Handle 10 Lifting arm 11 Support frame 12 Support frame 13 Running part 13a Drive wheel 13b Driven wheel 13c Crawler Belt 14 Motor 15 Aircraft Frame 16 Battery 17 Lift arm fulcrum axis 19 Elastic Body 20 Stopper holder 21 Stopper G Work surface S snow

Claims

1. A working machine having a working unit attached to a traveling machine for pushing and discharging an object, The working unit comprises a working unit body pivotally mounted on a fulcrum shaft so as to be rotatable in a vertical direction, The working unit body has a lower portion formed in a substantially straight line so that the working unit body is in an upright state from the lower end to the center when the working unit body is in a push-out position due to the rotation, and an upper portion formed in an arc shape curved inward in the counter-traveling direction, The distance L between the fulcrum shaft and the upper end of the working unit body 1 is the distance L between the fulcrum axis and the lower end of the working part. 2 It is formed to be 1.5 times or more and 3 times or less in size. An elastic body that is biased toward the body of the traveling machine is provided at the bottom of the working unit body, and is connected to the body via the elastic body, Furthermore, the working unit is characterized in that the lower end portion comes into contact with the working surface during the pushing operation, and the lower portion is in an upright state during the discharging operation, so that the lower end portion comes into contact with the working surface to prevent the object from being discharged rearward from the lower end portion.

2. 2. The working machine according to claim 1, wherein the distance L between the fulcrum shaft and the upper end of the working unit body is 1 is the distance L between the fulcrum shaft and the lower end of the working unit body. 2 A work machine characterized in that the working force is three times that of the above.

3. 3. The working machine according to claim 1 or 2, wherein the working unit body moves continuously from a push-out position in which the upper portion faces forward and the lower portion is tilted backward to a discharge position in which the upper portion faces downward and the lower portion stands up.

4. 4. The working machine according to claim 1, further comprising a stopper provided near a lower end of said working unit body for restricting a rotational movement of said working unit body when said working unit body is in the discharge position.

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