WO2023228580A1

WO2023228580A1 - Work machine

Info

Publication number: WO2023228580A1
Application number: PCT/JP2023/013758
Authority: WO
Inventors: 悦男木島
Original assignee: 株式会社Ｉｈｉアグリテック
Priority date: 2022-05-26
Filing date: 2023-04-03
Publication date: 2023-11-30
Also published as: TW202400003A; JP2023173673A

Abstract

The present invention addresses the problem of reducing a work load required to return an overturned work machine. The present invention solves this problem by providing a work machine equipped with a protective frame, said protective frame covering the upper surface of the work machine so as to protect the same and having a protrusion that is the highest point on the upper inner side of the work machine.

Description

work equipment

The present invention relates to working machines, such as mowers, bulldozers, and snow blowers, regardless of technical fields such as agriculture, civil engineering, and construction.

The area where work equipment performs work is not necessarily flat. In particular, grass mowers are often used on slopes and the like, and are sometimes fitted with a safety frame to protect the work equipment and the driver (Patent Document 1).

Japanese Patent Application Publication No. 06-227424

However, the conventional safety frame (roll bar) has a flat top and may turn over if the work equipment falls over.
If the work equipment is turned upside down, there is a risk of fuel leakage. Furthermore, leaked fuel and lubricating oil are undesirable from the viewpoint of environmental conservation. Furthermore, if a working machine that has been turned upside down continues to fall over for a long period of time, lubricating oil and fuel may flow into undesirable areas, which may cause problems in restarting the engine.
If the work machine is turned over (inverted), the worker must rotate it 180 degrees to return it to its normal orientation. Once the work equipment is in an inverted position, it becomes extremely difficult to return to its original position. In addition, if the work equipment falls on a slope, the worker must return to work on the dangerous slope, which may force the worker to perform dangerous work.

An object of the present invention is to reduce the work required to return a working machine when it falls over.

The present invention provides a working machine equipped with a protective frame, wherein the protective frame protects the upper surface of the working machine and has a protrusion that is the highest on the inside of the upper part of the working machine. I solved the problem by doing so.

When the work machine of the present invention falls down, it is possible to reduce the work required to return to work.

1 is a perspective view of a mower (work machine) according to a first embodiment. FIG. 2 is an explanatory diagram of a lawn mower (working machine) of Example 1. (A) A plan view of the mower (working machine) 1 viewed from above. (B) A side view of the mower (working machine) 1 viewed from the side. (C) A rear view of the mower (working machine) 1 viewed from the rear in the direction of travel. An explanatory diagram of the positional relationship of the protective frame and the direction of overturning.

(Example 1)
Embodiment 1 is an example in which a lawn mower (working machine) 1 is used as an example. FIG. 1 is a perspective view of a mower (work machine) 1 according to the first embodiment. The mower (work machine) 1 of the first embodiment is designed to be able to cut grass on embankments and slopes of expressways. The mower (working machine) 1 is not provided with a pilot's seat to avoid danger, and is operated by remote control.
Note that the front and back of FIG. 1 are the front and rear of the mowing section (working section) 11 of the mower (working machine) 1, and the front, rear, right, and left directions are the same in the following drawings.

The running section 15 employs crawlers that have a larger ground contact area than wheels and are less prone to overturning. A mowing section (work section) 11 is attached to the front of the vehicle body section 12. If the weight balance of the mower (working machine) 1 is uneven, there is a great risk of it falling over. As a countermeasure against this, the mower (working machine) 1 of the first embodiment is designed to have a heavy engine 13 and a hydraulic tank at the rear, and to maintain balance with the mowing section (working section) 11 at the front.

When mowing a slope, a worker usually operates the mower (work machine) 1 along a contour line. At this time, the mower (working machine) 1 moves along the contour line (with the left or right side of the vehicle body 12 on the lower side) with the vehicle body longitudinal axis A facing the contour line while mowing the grass. Therefore, when the mower (working machine) 1 falls, it often falls in the right or left direction, that is, on its side. The mowing machine (work machine) 1 has a longer width in the front-rear direction than the width in the right-left direction, so it is difficult to fall over in the front-rear direction, and the mowing part (working part) 11 may face in a lower direction when turning on a slope. , it is rare for the patient to fall forward.

A grass mower (work machine) 1 is provided with a protective frame 4 that covers the top surface of the work machine in order to protect the top surface of the work machine when it falls over. The left front frame 41L and the right rear frame 42R of the first embodiment are connected to form a continuous frame. Further, the front right frame 41R and the rear left frame 42L are connected to form a continuous frame.
The protection frame 4 has a top portion (projection portion) 43 which is the highest point on the upper inner side of the mower (working machine) 1. These continuous frames are crossed in an X-shape at the top (protruding part) 43 and fastened at the top fastening part 431.

Although such a structure is adopted in the first embodiment, the protective frame 4 may be of any type as long as it covers at least the upper surface of the mower (working machine) 1 and has a top (projection). . Another protective frame may be added to further improve strength.

[Function of the top (projection)]
The top portion (protruding portion) 43 is provided on the protection frame 4 and is located at the highest point on the upper inner side of the mower (working machine) 1. The top portion (protruding portion) 43 intentionally functions to make the mower (working machine) 1 unstable when it falls over and becomes upside down. The upside-down mower (working machine) 1 cannot keep its top (protruding part) 43 down and rotates further along the slope, causing the traveling part 15 to touch the ground and return to its original position easily.
In addition, even if the mower (work machine) 1 does not fall that far, if the grass mower (work machine) 1 stops lying on its side, the top (protruding part) 43 of the protection frame 4 Because it is at the highest point, it cannot be completely inverted. The grass mower (work machine) 1 that is upside down cannot be supported by the highest point (projection) 43, and falls with the top (projection) 43 facing the slope. It's just like you can't hold a pencil upright with its sharp lead down. The worker can easily return the mower (working machine) 1 to the normal position by pushing the running part 15 from a higher side of the slope.

The top portion (protruding portion) 43 is located at the highest point on the upper inner side of the mower (working machine) 1, but its position is preferably near the center of the mowing machine (working machine) 1. Even if the mower (work equipment) 1 that works along the contour line rolls over from either side, from the left side or the right side, it will protect the upper part of the grass cutter (work equipment) 1 in the same way, and keep it upright in the same way. This is because it will return to .
Note that the top portion (projection portion) 43 may be provided closer to either the left, right, front, or rear of the mower (working machine) 1. For example, if the seat of a riding type work machine is installed biased to the right side, if the top (protrusion) 43 is provided directly above the seat to protect the worker, the top (protrusion) 43 will end up being tilted to the right. There may be bias towards The mower (working machine) 1 having the top portion (protruding portion) 43 that is biased to the right side will fall differently depending on whether it falls from the left side or the right side.

[Protective frame]
Further, the protection frame 4 of the first embodiment has an X-shaped cross structure and covers the upper surface of the mower (working machine) 1 to protect it. The protective frame 4 of the present invention may have any structure as long as it can protect the upper surface of the mower (working machine) 1 when it falls over.

[Modified example of top (projection)]
The fact that the protective frame 4 has the top (protrusion) 43 has another advantage. Although Embodiment 1 is an unmanned mower (work machine) 1, slope work is also performed using the manned mower (work machine) 1. A modification is a mode in which a seat is arranged under the top (protrusion) 43 as described above. The top portion (projection portion) 43 crosses in an X-shape. Although the worker is protected by a seat belt, etc., with the conventional protection frame that covers the top of the mower (work equipment) 1 in the horizontal direction, if the worker falls upside down, the worker's head may fall above the protection frame 4. There were times when it would fly out and end up on the slope side. It would be dangerous if the head of the worker were to come out of the protective frame 4. In the grass mower (working machine) 1 of the first embodiment, the worker's head hits the top (protrusion) 43 that intersects in an X shape, so the worker's head does not protrude outside the protective frame 4. can be protected.
In addition, although the crossed portion of the crossed protection frame 4 is used as the top (protrusion) 43, a protrusion-like structure is attached to the protection frame 4 on the upper inner side of the mower (working machine) 1 to form the top (protrusion). It may be set to 43.

[Modified example of protective frame]
In the protection frame 4 of the first embodiment, the left front frame 41L and the right rear frame 42R are one continuous frame, and the right front frame 41R and the left rear frame 42L are one continuous frame.
The type of unit of the protective frame 4 can be determined as appropriate. For example, one bar may be bent to form the left front frame 41L and the right front frame 41R. Further, the left front frame 41L may be divided into several parts, which may be assembled using connecting joints to form the left front frame 41L.

[Installing the protective frame]
FIG. 2(A) is a plan view of the mower (working machine) 1 seen from above, FIG. 2(B) is a side view of the mowing machine (working machine) 1 seen from the side, and FIG. ) is a rear view of the mower (working machine) 1 seen from the rear in the direction of travel. The front, rear, left, and right standards of FIG. 2 are the same as those of FIG.
The protective frame 4 is made of a sturdy material in order to support the load of the mower (working machine) 1 when it falls over. Further, the bases of the left front frame 41L and the right front frame 41R are fixed to a sturdy member such as the vehicle body frame 14, as shown in FIG. 2(A). As shown in FIG. 2C, the left rear frame 42L and the right rear frame 42R are also fixed to the vehicle body frame 14. Heavy objects such as an engine and a hydraulic tank are arranged at the rear of the vehicle body of the mower (working machine) 1, and in order to protect them, a guard plate 52 is fixed to the left rear frame 42L and the right rear frame 42R. ing.

[Recovery from a fall]
As shown in FIG. 2(A), the mower (work machine) 1 runs along a contour line on an inclined surface such that the left side of the running section 15 is high and the right side of the running section 15 is low. are doing. Therefore, the longitudinal axis A of the vehicle body of the mower (working machine) 1 is in a positional relationship parallel to the contour lines. Even on a slope that appears to be harmless at first glance, if a stone is hidden by grass, the traveling section 15 may run onto the stone and fall toward the lower side of the slope.
Here, consider a situation in which the mower (working machine) 1 in FIG. 2A rolls over toward the lower side, turns upside down (inverted position), and then returns to its original state (upright position). The mower (working machine) 1 returns to the normal position after going through the following states (1) to (7).

(1) The overturning starts by rolling down the slope centering on the widthwise lower ground contact line CDL of the right running section 15. The overturned lawn mower (working machine) 1 temporarily stands upright on the slope with the entire right running section 15 touching the ground. In other words, the mower (working machine) 1 is in a state where the entire right side surface of the running section 15, which is surrounded by the machine width outer lower ground contact line CDL and the machine width outer upper ground contact line CUL of the running section 15, is in contact with the ground. It will be in an upright state (completely lying on its side).

(2) The mower (working machine) 1 that has overturned onto the lower side of the right running section 15 further rotates laterally. The overturned grass mower (work machine) 1 is temporarily placed on a surface surrounded by the right ground contact line RL connecting the right front frame ground point 41RS and the right rear frame ground point 42RS and the upper ground contact line CUL on the outside of the machine width of the running section 15. It begins to fall upside down as if touching the ground.
(3) When the mower (working machine) 1 further rotates, it begins to rotate toward the top (projection) 43 around the right grounding line RL. Then, the frame is almost turned upside down so that the triangular surface connecting the top (projection) 43, the left front frame grounding point 41LS, and the left rear frame grounding point 42LS is in contact with the ground.

(4) Since this surface has a small area and is very unstable, when the mower (working machine) 1 rotates further, it begins to fall down toward the top (projection) 43. Since it is unstable and impossible to stand upright with only the top (projection) 43 at the highest point, the mower (working machine) 1 is momentarily supported by the top (projection) and then immediately turned on its left side. Starts to fall down. The mower (working machine) 1 rotating beyond the top (protrusion) 43 temporarily makes contact with the ground on a triangular surface connecting the left front frame grounding point 41LS, the left rear frame grounding point 42LS, and the top (protrusion) 43. This state is also almost upside down.

(5) When rotating further, the mower (work equipment) 1 rotates around the left grounding line LL connecting the left front frame grounding point 41LS and the left rear frame grounding point 42LS, and the upper part of the left grounding line LL and the running section 15. He lands on the ground, falls down, and begins to rise slightly.

(6) When the mower (work machine) 1 rotates further, the entire side surface of the left traveling section 15 is brought into contact with the ground, and the mower (work machine) 1 comes to stand upright on the slope. In other words, the mower (working machine) 1 is configured to ground the entire left side of the running section 15, which is surrounded by the lower ground contact line CDL on the outside of the machine width and the upper ground contact line CUL on the outside of the machine width, against the inclined surface. It will be in an upright position (completely lying on its side).

(7) Finally, the mower (working machine) 1 further rotates around the lower ground contact line CDL on the left side of the machine width outside the running section 15, and returns to the normal position.
Through the process described above, the mower (working machine) 1 that has fallen down the slope to the right returns to its normal position.

In the above explanation, the mower (work machine) 1 is running on a slope along a contour line with the right side of the running section 15 being high and the left side of the running section 15 being low. The same is true for both, and in the above explanation, the right can be read as the left, and the left can be read as the right.

[Action of the top (projection)]
Even if the mower (work equipment) 1 were to fall over in any of the above conditions (1) to (6), the worker would be able to remove the mower from the top of the slope. (Work machine) By pressing 1, it can be easily returned to the normal position.
Further, since the grass mower (working machine) 1 has the top portion (protruding portion) 43 on the protective frame 4, it can be turned upside down (reverse position) unstable and can be easily returned to the normal position.
In the lawn mower (working machine) 1 of the first embodiment, since the protective frame 4 has the top (protrusion) 43, it is less likely to stop falling in the upside down (reverse position) state than in the prior art (Patent Document 1). , it often rotates as it is and stands still in the normal position.

Conventionally, as described in Patent Document 1, protective frames for work machines used particularly on slopes have often had flat upper surfaces, and have often stood still in an inverted position. This stems from the technical idea that even if you stand still in an inverted position, it is better than continuing to fall and falling all the way to the bottom of the slope. In fact, a protective frame with a flat top surface is difficult to return to from an inverted position and can only be returned to normal position by applying continuous force. If the rotational force at the time of overturning is not strong, the work equipment will stop overturning in the reverse position.
Embodiment 1 is a completely different technical concept in which the fall may continue, but the fall does not stop in the reverse position, and priority is given to returning to the upright position (rest), or to simplify the return from the reverse position. based on. Even if the mower (working machine) 1 of the first embodiment is in an inverted position, it can be easily returned to the normal position, which means that the overturning continues even if the rotational force is not strong.
The problem of continuous falling in the first embodiment is solved in the next section [Effects due to the positional relationship of the front and rear protection frames].

[Effects due to the positional relationship between the front and rear protective frames]
FIG. 3 is an explanatory diagram of the positional relationship of the protective frame and the direction of fall. The structure of the mower (working machine) 1 in FIGS. 2 and 3 is exactly the same, and the process of overturning is exactly the same as the above-mentioned "Recovery from overturning" section.
The above-mentioned section [Recovery from a fall] was an explanation focusing on the process of returning to an upright position after a fall using FIG. 2 . In this section, the explanation will focus on the change in direction of the mower (working machine) 1 upon return. The phenomenon that occurs when the same mower (working machine) 1 falls over is explained from a different perspective, so some of the explanations overlap with the section [Recovery from falling].

As explained in the section [Recovering from a fall], the mower (work equipment) 1 overturned while running on a contour line with the right side of the running section 15 on the lower side of the slope, and was turned upside down (upside down). , and then think about how to return to the original position (Seishin).
(1) This is the same as in item (1) of [Recovery from an overturn], and an overturn begins by rolling down a slope centering around the lower ground contact line CDL on the outside of the machine width of the right running section 15. The overturned lawn mower (working machine) 1 stands upright on the slope with the entire right running section 15 touching the ground.

(2) Same as item (2) of [Recovery from fall]. The mower (working machine) 1, which has overturned with the right side traveling portion 15 touching the ground, further overturns. Then, it begins to fall upside down so as to touch the ground on a surface surrounded by the right grounding line RL connecting the right front frame grounding point 41RS and the right rear frame grounding point 42RS and the upper grounding line CUL on the outside of the aircraft width of the running section 15. .

(3) This is the same as in item (3) of [Recovery from falling], and when the mower (work equipment) 1 rotates further, the right grounding line RL connecting the right rear frame grounding point 42RS and the right front frame grounding point 41RS is The shaft begins to rotate toward the top (protrusion) 43.
Here, the effects of the positional relationship of the protection frames will be explained. As shown in FIG. 3, the direction of the right ground contact line RL is different from the direction of the vehicle body longitudinal axis A in plan view. The direction of the right ground contact line RL starts near the inner side beyond the running section 15 on the right side at the rear of the mower (working machine) 1, and gradually extends to the right side from the longitudinal axis A of the vehicle body. Therefore, the mower (working machine) 1, which rotates around the right ground contact line RL, starts to change direction. The longitudinal axis A of the vehicle body, which had been extending toward the contour line, changes direction and now moves toward the side slightly lower than the contour line. A mowing section (working section) 11 attached to the front of the mowing machine (working machine) 1 changes its direction slightly to the lower side.
Then, the frame is almost turned upside down so that the triangular surface connecting the top (projection) 43, the left front frame grounding point 41LS, and the left rear frame grounding point 42LS is in contact with the ground.

(4) This is the same as in item (4) of [Recovery from falling], and since this surface has a small area and is very unstable, when the mower (work equipment) 1 rotates, the top (protrusion) 43 As it passes by, the left side of the mower (working machine) 1 comes into contact with the ground. The mower (working machine) 1 rotating beyond the top (protrusion) 43 temporarily makes contact with the ground on a triangular surface connecting the left front frame grounding point 41LS, the left rear frame grounding point 42LS, and the top (protrusion) 43. This state is also almost upside down.

(5) Same as item (5) of [Recovery from fall]. When the mower (work machine) 1 rotates further, it rotates around the left grounding line LL connecting the left front frame grounding point 41LS and the left rear frame grounding point 42LS, and makes the left grounding line LL and the upper part of the running section 15 touch the ground. , he falls down and starts to get up a little.
Here, the effects of the positional relationship of the protection frames will be explained.
The direction of the left ground contact line LL starts near the inner side beyond the running section 15 on the left side behind the mower (work machine) 1, and gradually extends to the left from the longitudinal axis A of the vehicle body.
Since the directions of the two axes are different in plan view, the direction of the mower (working machine) 1 is changed so that the longitudinal axis A of the vehicle body section is further directed toward the lower side of the inclined surface. That is, the mower (working machine) 1 changes direction so that the mowing part (working part) 11 faces lower and starts to rise.

(6) This is the same as in item (6) of [Recovery from falling], and when the mower (work machine) 1 rotates further, the entire left traveling section 15 is in contact with the ground and stands upright on the slope. becomes. In other words, the mower (work machine) 1 is configured such that the entire left side surface of the running section 15, which is surrounded by the lower ground contact line CDL on the outside of the machine width and the upper ground contact line CUL on the outer side of the machine, is in contact with the ground. ) 11 facing the lower side and standing upright (completely lying on its side) against the slope.

(7) This is the same as in item (6) of [Recovering from a fall], and the mower (work equipment) 1 rotates around the lower ground contact line CDL on the left side of the machine width outside of the running section 15, and the mower (work equipment) 1 returns to the normal position. Return.
The "state of returning to normal position after falling" in FIG. 3 illustrates this state.
In (3) and (5) above, the direction of the mower (work equipment) 1 changed twice from the contour line to the lower side, so the longitudinal axis A of the vehicle body was lower than the one that was along the contour line before falling. Lean towards the side.

In the prior art, even when the vehicle returns to its normal position after falling, the longitudinal axis A of the vehicle body remains along the contour line. If the longitudinal axis A of the vehicle body remained along the contour line, there was a risk that the vehicle would roll to the lowest point of the slope in the event of a strong fall.
When the mower (working machine) 1 of the first embodiment recovers from a fall, it changes the direction of the longitudinal axis A of the vehicle body toward the lower side of the slope and returns to the normal position. As shown in FIG. 3, the lower ground contact line CDL on the outside of the machine width, which can be the rotational axis of the lawn mower (working machine) 1 in the normal position, does not follow the contour line but faces toward the lower side. At this time, it is possible that the lawn mower (working machine) 1 will fall further, but the front and back width of the mower (working machine) 1 is longer than the width, and a fall that causes it to roll forward will only occur with great force. Therefore, the mower (working machine) 1 of the first embodiment does not continue to roll when it falls over normally.

[Modification of the direction of the left ground line LL and the right ground line RL]
As described above, it has been explained that the direction of the left ground line LL and the right ground line RL of the protective frame 4 are different from the direction of the vehicle body longitudinal axis A in plan view. The direction of the left ground line LL and the right ground line RL in the first embodiment extend from the rear of the mower (working machine) 1 to the front, and the direction of the left ground line LL and the right ground line RL extend from the rear to the front of the mower (work machine) 1. It shifts outward from axis A.
In such a case, as described above, the front of the mower (working machine) 1 (the mowing section (working section) 11) gradually tips over toward the lower side of the slope.

[Modified example of orientation of left ground line LL and right ground line RL]
In the present invention, the direction of the left ground line LL and the right ground line RL in the first embodiment extend from the rear of the mower (work machine) 1 to the front, and go to the front of the mower (work machine) 1. This also includes a modification in which the vehicle body section is directed inward from the longitudinal axis A.
This modification is suitable for a working machine in which a heavy working part is rear-mounted. In addition, in the case of riding-type work equipment, the worker may be frightened if the worker faces the lower side of the slope and the machine stops falling. The direction of the left grounding line LL and the direction of the right grounding line RL may be determined so that the working machine after falling down faces forward on the higher side of the slope. A worker riding on a working machine of such a modified example has less fear because the working machine faces higher and falls.

[Returning the grass mower (work equipment) that has been turned upside down]
When the mower (work machine) 1 equipped with the conventional protection frame 4 falls upside down, the worker is required to rotate the mower (work machine) 1 by 90 degrees and return it to the horizontal position.
It is not easy to perform this work on a slope.
The mower (work machine) 1 of the first embodiment cannot stand completely still in an inverted position due to the provision of the top portion (protruding portion) 43 on the protective frame 4. Even if the mower (work machine) 1 falls over with the top facing downward, the grass cutter (work machine) 1 of the first embodiment will still be able to perform the steps (3) to (5) in the [Recovery from fall] section. As described in , it is possible to return to the horizontal position in several stages by changing the axis of rotation. The operator does not have to rotate the device 90 degrees all at once as in the prior art.
The return operation of the mower (working machine) 1 of the first embodiment becomes much safer.

[Application to other work machines]
As described above, the applicant has shown and described the first embodiment using the mower (working machine) 1 as an example. As can be seen from the explanations in the sections [Recovery from falling] and [Effects depending on the positional relationship of the front and rear protective frames], the effect of the protective frame 4 is not limited to application to a specific working machine. A fall can occur in any working machine, even if it is not on a slope, and the present invention is a technology that can be applied to any working machine.
Although the first embodiment and various modifications of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the gist of the present invention is Even if there is a change in the design within a range that does not deviate from the above, it is included in the present invention.
In addition, each of the above-described embodiments can be combined by utilizing each other's technologies unless there is a particular contradiction or problem in the purpose, structure, etc.

(Contribution to SDGs)
The present invention particularly relates to a working machine used for work in places such as forests, embankments, and parks that require regular human management. The present invention contributes to the 15th goal of the SDGs (Sustainable Development Goals), "Let's protect the richness of the land. Sustainable management of forests" through the management of forests, embankments, parks, etc. I can do it.

1 Grass cutter (work machine)
11 Grass cutting department (work department)
12 Body part 13 Engine 14 Body machine frame 15 Running part 4 Protection frame 41L Left front frame 41LS Left front frame grounding point 41R Right front frame 41RS Right front frame grounding point 42L Left rear frame 42LS Left rear frame grounding point 42R Right rear frame 42RS Right rear frame grounding point Point 43 Top (projection)
431 Top fastening section 52 Guard plate A Vehicle body longitudinal axis RL Right ground line LL Left ground line CUL Machine width outer upper ground contact line CDL Machine width outer lower ground line

Claims

A working machine equipped with a protective frame,
The protective frame protects the top surface of the work machine, and
A working machine having a protruding portion that is the highest point on the upper inner side of the working machine.
The protection frame is configured by crossing a series of frames consisting of a front left frame and a rear right frame and a series of frames consisting of a front right frame and a rear left frame,
The working machine according to claim 1, wherein the cross portion is the protrusion.
The protection frame includes a left front frame, a right front frame, a left rear frame, and a right rear frame,
The direction of the right ground line that connects the grounding points of the right rear frame and the right front frame, which touch the ground when the right side falls, or the left ground line that connects the grounding points of the left rear frame and the left front frame, which touch the ground when the left side falls, is determined by the direction of the work equipment. 2. The working machine according to claim 1, wherein the vehicle body is oriented in a different direction in a plan view from the front-rear axis direction.
The working machine according to any one of claims 1 to 3, wherein the working machine has a grass cutting section.