WO2023188124A1

WO2023188124A1 - Ditch-digging machine

Info

Publication number: WO2023188124A1
Application number: PCT/JP2022/016044
Authority: WO
Inventors: 正典石川; 壮二鹿島
Original assignee: 本田技研工業株式会社
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2023-10-05

Abstract

A ditch-digging machine comprises a body having wheels, a working part that has a plurality of claws for digging and that causes the plurality of claws to rotate to dig a ditch in the ground, and a motor for driving the working part, the motor being disposed between the wheels and the working part in the forward-backward direction.

Description

Mizohori work machine

The present invention relates to a ditch digging machine.

Patent Document 1 discloses an agricultural machine that drives a trencher using the power of an engine.

Japanese Unexamined Patent Publication No. 57-162803

In recent years, work equipment has been increasingly electrified in order to reduce CO ₂ emissions from the perspective of climate-related disasters, and there is a shift toward configurations in which work is performed using motor power. It is planned that motors will also be used in trenchers that dig trenches in the ground, and it is desired to have a motor or the like that can improve the workability of trenching work.

Therefore, it is an object of the present invention to provide a ditch digging machine that is advantageous in terms of workability.

In order to achieve the above object, a ditch digging work machine as one aspect of the present invention has a machine body with wheels and a plurality of claws for digging, and rotates the plurality of claws to cut a groove in the ground. It is characterized in that it includes a digging working part and a motor for driving the working part, and the motor is disposed between the wheel and the working part in the front-rear direction.

According to the present invention, it is possible to provide a ditch digging machine that is advantageous in terms of workability.

The accompanying drawings are included in and constitute a part of the specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention.

A diagram showing an example of the configuration of a trenching work machine according to the present invention A block diagram schematically showing a trenching work machine according to the present invention A block diagram schematically showing a trenching work machine according to the present invention A block diagram schematically showing a trenching work machine according to the present invention A block diagram schematically showing a trenching work machine according to the present invention A block diagram schematically showing a trenching work machine according to the present invention

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the claimed invention, and not all combinations of features described in the embodiments are essential to the invention. Two or more features among the plurality of features described in the embodiments may be arbitrarily combined. In addition, the same or similar configurations are given the same reference numerals, and duplicate explanations will be omitted.

An embodiment of a trench honing machine 10 according to the present invention will be described. In each figure described below, arrows X, Y, and Z indicate directions perpendicular to each other, where the X direction is the front-rear direction of the Mizohori working machine 10, the Y direction is the left-right direction (width direction) of the Mizobori working machine 10, The Z direction indicates the vertical direction of the trench honing machine 10, respectively. In this embodiment, the +X direction indicates the traveling direction of the Mizohori work machine 10, and the +Y direction represents the left direction (the left side of the Mizohori work machine 10) and the -Y direction represents the right direction with respect to the traveling direction. The direction (to the right of the trench honing machine 10) is shown.

[Example of configuration of Mizohori work machine]
FIG. 1 shows an example of the configuration of a ditch honing work machine 10 according to this embodiment. The trenching machine 10 is a working machine that digs a trench in the ground, and is sometimes called a trenching machine, an excavator, or a trencher. The Mizohori working machine 10 of this embodiment includes a working part 11, a motor 12, a battery 13, a power control part 14, a power transmission mechanism 15, a body 16 (base), and a pair of left and right wheels 17. , and a handle portion 18. Note that the ditching work machine 10 of the present embodiment can be constructed as a hand-pushed (or hand-pulled) type in which the worker moves by pushing (or pulling) the machine by hand, but it can also be configured as a tractor-type on which the worker can ride. may be configured.

The work unit 11 is a unit for performing trenching work that excavates the ground and digs a trench. In the example of FIG. 1, the working unit 11 is configured in a chainsaw type including a plurality of digging claws (blades) 11a, a chain 11b, and a guide bar 11c. Note that the working unit 11 is not limited to the chainsaw type configuration shown in FIG. 1, and may have another type of configuration.

The plurality of digging claws 11a are members for scraping out soil from the ground to excavate the ground, and are attached to the chain 11b. In the example of FIG. 1, a plurality of digging claws 11a having the same shape are attached to the chain 11b at equal intervals, but the invention is not limited to this. They may be included, or they may not be attached to the chain 11b at equal intervals. Further, the chain 11b is a member that supports the plurality of excavating claws 11a, is arranged around the outer periphery of the guide bar 11c, and rotates along the outer periphery of the guide bar 11c by the power of the motor 12. Thereby, the plurality of digging claws 11a can be rotated and moved along the outer periphery of the guide bar 11c.

The guide bar 11c is a member extending from the front part of the body 16 to guide the rotational movement of the chain 11b (the plurality of digging claws 11a), and is rotatably provided at the front part of the body 16. Specifically, the guide bar 11c is rotatable in the ωY direction (rotation direction around the Y axis) about a rotation center PC located at the front of the aircraft body 16 as a fulcrum, as shown by arrow A in FIG. It is configured to rotate mechanically or electrically in response to the operation of the operating lever 19 by the operator. Thereby, the depth at which the guide bar 11c is inserted into the ground, ie, the depth of the groove formed in the ground, can be adjusted. Here, in the example of FIG. 1, the rotation center PC is located inside the guide bar 11c, but the rotation center PC is not limited thereto, and may be located outside the guide bar 11c.

The motor 12 is a drive source that includes a stator (not shown) and a rotor 12a, and generates power (rotational force) to rotate the rotor 12a by energizing a coil provided on one of the stator and the rotor 12a. be. The rotor 12a may be understood as a rotating shaft of the motor 12, and may be referred to as the rotating shaft 12a below. In the case of this embodiment, the motor 12 is arranged on the body 16 between the working part 11 and the wheels 17 so that the rotating shaft 12a extends in the left-right direction (Y direction). The specific arrangement of the motor 12 will be described later.

The battery 13 is a power source that supplies power to the motor 12 via a cable (not shown), and is arranged above the motor 12. In the case of this embodiment, the battery 13 is attached to the fuselage 16 (i.e., supported by the fuselage 16), but the battery 13 is not limited thereto, and may be attached to the motor 12 (i.e., supported by the motor 12). ). The battery 13 may be attached to the aircraft body 16 in a state where it is integrated with the motor 12 and the power control unit 14. Further, although FIG. 1 shows an example in which one battery 13 is mounted on the Mizohori working machine 10, the present invention is not limited to this, and a plurality of (two or more) batteries 13 may be mounted.

The power control unit 14 is, for example, a PCU (Power Control Unit), and controls the power supplied from the battery 13 to the motor 12. Although FIG. 1 shows an example in which the power control unit 14 is provided alone in the aircraft body 16, the power control unit 14 is not limited thereto, and may be provided in a state where it is integrated with the motor 12 and/or the battery 13, for example. .

The power transmission mechanism 15 is a mechanism that transmits the power (rotational force, driving force) of the motor 12 to the working part 11. In the case of this embodiment, the power transmission mechanism 15 is provided with a rotatable shaft (not shown) connected to the rotating shaft 12a of the motor 12 via a belt or the like, and the shaft is provided with a rotatable shaft (not shown) that is connected to the working part 11. A gear that engages with the chain 11b is attached. Therefore, by transmitting the power of the motor 12 (that is, the rotational force of the rotating shaft 12a) to the shaft through a belt or the like and rotating the shaft, the power of the motor 12 is transmitted to the working part 11, and the working part 11 chains 11b (a plurality of digging claws 11a) can be rotated along the outer periphery of the guide bar 11c.

The body 16 is configured as a base that supports the working part 11, the motor 12, and the battery 13. That is, the working part 11, the motor 12, and the battery 13 are attached to the body 16. Further, a pair of left and right wheels 17 are rotatably supported at the rear of the body 16. Specifically, an axle 17a extending along the left-right direction (Y direction) is rotatably supported by the body 16, and a pair of left and right wheels 17 are attached to the ends of the axle 17a. In addition, although the ditch|groove working machine 10 of this embodiment has the structure which includes only two wheels 17 of a left and right pair, it may have the structure which includes three or more wheels. For example, it may be a four-wheeled configuration in which two pairs of left and right wheels 17 are arranged in the front-rear direction.

The handle portion 18 is a member that is held by the operator in order to push or pull the trench honing machine 10 by hand. A work machine having such a handle part 18 is called a hand-push type (or hand-pull type) work machine or a walk-behind work machine, and a worker, in a standing position, grasps the handle part 18 and operates the ditch honing work machine 10. Ditching work can be done by pushing (or pulling) . As shown in FIG. 1, the handle portion 18 of this embodiment includes an extending member 18a extending rearward and obliquely upward from the rear of the machine body 16, and a grip ( 18b. Further, the handle portion 18 may be provided with an operation portion for the operator to operate the ditch honing work machine 10.

[Configuration requirements of Mizohori work machine]
Next, the constituent elements of the ditch digging working machine 10 of this embodiment will be explained with reference to FIGS. 2 to 6. 2 to 6 are block diagrams schematically showing the working part 11 (guide bar 11c), motor 12, battery 13, and wheels 17 in the ditch hori work machine 10 shown in FIG. It is used to explain ~9. It should be noted that in the ditching work machine 10 of this embodiment, not all of the constituent requirements 1 to 9 shown below are essential. Constituent requirement 1 may be understood as essential for the ditching work machine 10 of this embodiment, but constituent requirements 2 to 9 can be optionally applied to the ditching machine 10 of this embodiment. . Furthermore, the ditch digging work machine 10 of the present embodiment may include constituent features specified (defined) from FIGS. 1 to 6 in addition to or in place of the following constituent features 1 to 9.

(Component Requirement 1)
Constituent requirement 1 is that the motor 12 is disposed between the working part 11 and the wheels 17 in the longitudinal direction (X direction). In this case, as shown in FIG. 2, according to the lever principle, the point of contact between the wheel 17 and the ground is the fulcrum, the working part 11 is the point of action, and the position of the motor 12 is the point of effort, and the weight of the motor 12 is added to the point of effort. It will be done. Therefore, the weight of the motor 12 applied to the point of force presses the working part 11 as the point of action against the ground, making it possible to perform trench digging work efficiently. Furthermore, according to configuration requirement 1, the transmission path of power transmitted from the motor 12 to the working part 11 via the power transmission mechanism 15 is made shorter than in a configuration in which the motor 12 is disposed behind the wheels 17. be able to. Therefore, the power loss in the transmission path can be reduced, and the power of the motor 12 can be efficiently transmitted to the working part 11. In this way, by applying component 1, it is possible to improve the workability of trench digging work.

(Component Requirement 2)
Constituent requirement 2 is that the motor 12 is arranged so that the lower end of the motor 12 is lower than the upper end of the wheels 17 in the vertical direction (Z direction). In this way, by arranging the relatively heavy motor 12 so that the lower end of the motor 12 is lower than the upper end of the wheels 17, the center of gravity of the trenching work machine 10 is lowered, and it is possible to It is possible to improve the stability of the trench honing work machine 10 during work.

(Component Requirement 3)
Constituent requirement 3 is that the motor 12 is arranged such that the rotating shaft 12a of the motor 12 is lower than the upper end of the wheel 17 in the vertical direction (Z direction), as shown in FIG. In this configuration requirement 3, by restricting the vertical position of the motor 12 compared to the above-mentioned configuration requirement 2, it is possible to further lower the center of gravity of the groove honing machine 10 and further improve the stability of the groove honing machine 10. can.

(Component Requirement 4)
Constituent requirement 4 is that, as shown in FIG. 5, the motor 12 is arranged such that the upper end of the motor 12 is higher than the rotation center PC of the working part 11 (guide bar 11c) in the vertical direction (Z direction). It is. This prevents the motor 12 (specifically, the part of the machine body 16 where the motor 12 is arranged) from coming into contact with the ground when the trenching work machine 10 leans forward during trenching work. The weight of the motor 12 applied to the point of force can be appropriately transmitted to the working part 11 as the point of action. In other words, it is possible to perform the ditch digging work efficiently and improve the workability of the ditch digging work.

(Component Requirement 5)
Constituent requirement 5 is that, as shown in FIG. 6, the motor 12 is arranged so that the lower end of the motor 12 is lower than the rotation center PC of the working part 11 (guide bar 11c) in the vertical direction (Z direction). It is. In this way, by arranging the relatively heavy motor 12 so that it is lower than the rotation center PC of the working part 11, the center of gravity of the trenching work machine 10 is lowered, and it can be easily used while traveling and/or during trenching work. The stability of the groove digging work machine 10 inside can be improved. Furthermore, while constituent requirement 4 stipulates the lower limit value of the arrangement relationship between the working part 11 (rotation center PC) and the motor 12, this constituent feature 5 stipulates the upper limit value of the arrangement relation. It may be understood as something that does.

(Component Requirement 6)
Constituent requirement 6 is that, as shown in FIGS. 2 to 6, the motor 12 is disposed behind the rotation center PC of the working part 11 (guide bar 11c) in the front-rear direction (X direction). As a result, compared to a configuration in which the motor 12 is disposed in front of the rotation center PC of the working part 11, the center of gravity of the Mizohori work machine 10 can be located at the rear (i.e., on the wheel 17 side). The stability of the work machine 10 can be improved.

(Component Requirement 7)
Constituent requirement 7 is that the motor 12 is disposed in front of the rear end of the rearmost wheel among the plurality of wheels 17. This configuration requirement 7 becomes more effective when a plurality of wheels are arranged in the longitudinal direction. For example, when the ditch digging work machine 10 has a four-wheel configuration in which two pairs of left and right wheels 17 are arranged in the front-rear direction, the motor 12 is disposed in front of the rear end of the rear wheels 17. Thereby, the center of gravity of the trench moat work machine 10 can be placed at the rear, so that the stability of the trench moat work machine 10 can be improved.

(Component Requirement 8)
Constituent requirement 8 is that the battery 13 is disposed above the motor 12 in the vertical direction (Z direction). This allows the weight of the battery 13 to be added to the weight of the motor 12 in addition to the weight of the motor 12 in the lever principle described above with reference to FIG. Therefore, the load applied to the point of effort increases, and the working part 11 as the point of action is pressed more strongly against the ground, making it possible to perform trench digging work even more efficiently.

(Component Requirement 9)
Constituent requirement 9 is that the battery 13 is arranged such that the length (height) of the battery 13 in the up-down direction (Z direction) is shorter than the length in the front-back direction (X direction). It is even better if the battery 13 is arranged so that the length of the battery 13 in the vertical direction is shorter than the length of the battery 13 in the horizontal direction (Y direction). This component 9 may be understood as arranging the battery 13 so that the longitudinal direction of the battery 13 is different from the vertical direction. For example, when the battery 13 has a rectangular shape, the longitudinal direction of the battery 13 is preferably different from the vertical direction (Z direction), and preferably, the longitudinal direction of the battery 13 is oriented perpendicular to the vertical direction. , can be laid down. As a result, it is possible to reduce the possibility that the battery 13 obstructs the operator's ability to visually check the work area of the work unit 11 while holding the handle part 18 while digging the trench. In other words, it is possible to improve the visibility of the worker and improve the workability of the trench honing machine 10.

<Summary of embodiments>
1. The groove hori work machine of the above embodiment is
a fuselage (e.g. 16) having wheels (e.g. 17);
a working part (for example, 11) that has a plurality of digging claws (for example, 11a) and excavates a groove in the ground by rotating the plurality of claws;
a motor (for example 12) for driving the working part;
Equipped with
The motor is arranged between the wheel and the working part in the front-rear direction.
According to this configuration, the weight of the motor applied to the point of force presses the working part as the point of action against the ground, making it possible to perform trench digging work efficiently. In addition, since the transmission path of the power (driving force) transmitted from the motor to the working part can be shortened, the loss of power in the transmission path is reduced, and the power of the motor is efficiently transferred to the working part. can be transmitted. In other words, the workability of trench digging work can be improved.

2. In the above embodiment,
The motor is arranged such that the lower end of the motor is lower than the upper end of the wheel in the vertical direction.
According to this configuration, the center of gravity of the trenching work machine is lowered, and the stability of the trenching work machine can be improved while traveling and/or during trenching work.

3. In the above embodiment,
The motor has a rotating shaft (for example, 12a) extending in the left-right direction, and is arranged so that the rotating shaft is lower than the upper end of the wheel in the vertical direction.
According to this configuration, the center of gravity of the trenching work machine is lowered, and the stability of the trenching work machine can be improved while traveling and/or during trenching work.

4. In the above embodiment,
The working part has a rotatable guide bar (for example, 11c), and is configured to rotate the plurality of claws along the outer periphery of the guide bar.
According to this configuration, there is provided a trench digging machine configured to dig a trench in the ground by rotationally moving the plurality of claws along the outer periphery of the guide bar. In addition, by making the guide bar rotatable in the groove digging work machine, the depth of the groove formed in the ground can be adjusted.

5. In the above embodiment,
The working part has a chain (for example, 11b) that rotates along the outer periphery of the guide bar,
The plurality of claws are attached to the chain.
According to this configuration, a trenching work machine is provided that rotates and moves a chain to which a plurality of claws are attached along the outer periphery of the guide bar.

6. In the above embodiment,
The motor is arranged such that the upper end of the motor is higher than the rotation center (for example, PC) of the guide bar in the vertical direction.
According to this configuration, when the trenching work machine tilts forward, the motor can be prevented from contacting the ground, and the weight of the motor applied to the point of force can be appropriately transmitted to the working part as the point of action. can. In other words, it is possible to perform the ditch digging work efficiently and improve the workability of the ditch digging work.

7. In the above embodiment,
The motor is arranged such that the lower end of the motor is lower than the rotation center (for example, PC) of the guide bar in the vertical direction.
According to this configuration, the center of gravity of the trenching work machine is lowered, and the stability of the trenching work machine can be improved while traveling and/or during trenching work.

8. In the above embodiment,
The motor is disposed behind the rotation center (for example, PC) of the guide bar in the front-rear direction.
According to this configuration, the center of gravity of the trench moat work machine can be placed at the rear, so that the stability of the trench trench work machine can be improved.

9. In the above embodiment,
The aircraft has a plurality of wheels (for example, 17),
The motor is disposed in front of the rear end of the rearmost wheel among the plurality of wheels.
According to this configuration, the center of gravity of the trench moat work machine can be placed at the rear, so that the stability of the trench trench work machine can be improved.

10. In the above embodiment,
further comprising a battery (e.g. 13) that supplies power to the motor;
The battery is placed above the motor.
According to this configuration, the weight of the battery can be added to the weight of the motor in addition to the weight of the motor. Therefore, the load applied to the force point increases, and the working part, which is the point of force, is pressed more strongly against the ground, making it possible to perform trench digging work more efficiently.

11. In the above embodiment,
The battery is arranged such that the length of the battery in the up-down direction is shorter than the length in the front-back direction.
According to this configuration, it is possible to improve the visibility of the worker and improve the workability of the trench honing machine.

12. In the above embodiment,
The working section is provided at the front part of the machine body.
According to this configuration, a ditch digging work machine is provided in which a working part that performs ditch digging work is arranged at the front part.

13. In the above embodiment,
The groove honing work machine is a hand-pushed or hand-pulled work machine that has a handle portion (for example, 18) that is grasped by an operator.
According to this configuration, a hand-pushed or hand-pull type ditch digging machine is provided.

The invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention. Therefore, the following claims are hereby appended to disclose the scope of the invention.

10: Grooving work machine, 11: Working part, 11a: Excavation claw, 11b: Chain, 11c: Guide bar, 12: Motor, 13: Battery, 14: Power control unit, 15: Power transmission mechanism, 16: Airframe, 17: Wheel, 18: Handle part

Claims

an aircraft body with wheels;
a working unit having a plurality of claws for digging and digging a groove in the ground by rotating the plurality of claws;
a motor for driving the working part;
Equipped with
A ditch digging work machine, wherein the motor is disposed between the wheel and the working section in the front-rear direction.
The trench digging work machine according to claim 1, wherein the motor is arranged such that a lower end of the motor is lower than an upper end of the wheel in the vertical direction.
The groove according to claim 1 or 2, wherein the motor has a rotating shaft extending in the left-right direction, and is arranged such that the rotating shaft is lower than the upper end of the wheel in the vertical direction. Hori work machine.
4. The working part has a rotatable guide bar, and is configured to rotate the plurality of claws along the outer periphery of the guide bar. The ditching work machine according to item 1.
The working part has a chain that rotates along the outer periphery of the guide bar,
The trench digging machine according to claim 4, wherein the plurality of claws are attached to the chain.
The trench digging work machine according to claim 4 or 5, wherein the motor is arranged such that the upper end of the motor is higher than the center of rotation of the guide bar in the vertical direction.
The trench digging work according to any one of claims 4 to 6, wherein the motor is arranged such that a lower end of the motor is lower than a center of rotation of the guide bar in the vertical direction. Machine.
8. The trenching work machine according to any one of claims 4 to 7, wherein the motor is disposed rearward from the center of rotation of the guide bar in the front-rear direction.
The aircraft has a plurality of wheels,
9. The ditch digging work machine according to claim 1, wherein the motor is disposed forward of the rear end of the rearmost wheel among the plurality of wheels.
further comprising a battery that supplies power to the motor,
The ditch digging work machine according to any one of claims 1 to 9, wherein the battery is arranged above the motor.
The ditch digging work machine according to claim 10, wherein the battery is arranged such that the length of the battery in the vertical direction is shorter than the length in the front and back direction.
The trenching work machine according to any one of claims 1 to 11, wherein the working part is provided at the front part of the machine body.
The trenching work machine according to any one of claims 1 to 12, wherein the trenching work machine is a hand-pushed or hand-pulled work machine having a handle portion that is held by an operator.