JPH0620379B2 - Lawn mower - Google Patents

Description

TECHNICAL FIELD The present invention relates to a lawn mower that travels by power.

[Conventional technology]

In a conventional ordinary lawn mower of this type, a cutting blade (usually,
The combination of the rotary blade and the receiving blade rubbed on the rotary blade) was supported by the vehicle body equipped with an engine and a power transmission mechanism for power running.

Further, Japanese Utility Model Laid-Open No. 62-74515 has a lawn mower having a cutter frame that can swing with respect to a vehicle body around a swing shaft extending in the front-rear direction of the vehicle body, and a cutter blade supported by the cutter frame. Is disclosed.

[Problems to be Solved by the Invention]

The height of grass cut by a lawn mower is determined by the distance between the cutting blade and the ground surface. Therefore, even in the conventional ordinary lawn mower in which the cutting blade is supported by the vehicle body, if the ground surface is perfectly flat, the cutting blade and the ground can be kept constant if the position of the cutting blade with respect to the vehicle body is kept constant. Since the distance from the surface does not change at all times, the cutting height of grass is always uniform. However, in reality, there is unevenness on the ground surface, and if this unevenness is small in relation to the distance between the front and rear wheels of the vehicle body, the distance between the cutting blade and the ground surface changes, and the cutting height is It will change. In other words, due to the unevenness of the ground surface, if the portion of the ground surface directly below the cutting blade comes to a position higher or lower than the common tangent plane for the front and rear wheels, the cutting blade and the ground surface The interval changes and the cutting height also changes.

Therefore, if the distance between the front wheels and the rear wheels of the vehicle body is made as small as possible, the cutting height of the lawn can be made uniform even with respect to smaller irregularities on the ground surface.

However, in a lawn mower that travels by power, it is necessary to mount a power source and a power transmission mechanism for driving the vehicle body on the vehicle body. Therefore, in reality, the total length of the vehicle body cannot be shortened beyond a certain limit. As a result, the distance between the front and rear wheels of the vehicle body cannot be shortened beyond a certain limit.
Therefore, the conventional ordinary lawnmower in which the cutting blade is supported by the vehicle body as described above has a drawback in that the lawn cutting height cannot be made uniform in a place having small irregularities on the ground surface.

Further, in Japanese Utility Model Laid-Open No. 62-74515, the cutting blade support pair (cutter frame) for supporting the cutting blade is swingable with respect to the vehicle body about a noise shaft extending in the front-rear direction of the vehicle body. Since the cutting blade support body is pushed forward from the vehicle body and moved forward, there is a problem that the cutting blade support body is in a state of being slid forward and the vehicle cannot travel smoothly. Also,
Since the cutting blade support could not move up and down with respect to the car body,
It was not possible to make the cutting height of the lawn uniform by moving the cutting blade up and down and tilting it faithfully to the unevenness of the ground surface.

The present invention has been made to solve the above-mentioned conventional drawbacks, and an object of the present invention is to provide a lawnmower capable of uniforming the lawn cutting height even in a place where the ground surface has small irregularities.

[Means for solving problems]

The lawnmower according to the present invention includes a vehicle body, a vehicle body-side wheel that supports the vehicle body and grounds it, a power source and a power transmission mechanism that are mounted on the vehicle body, and that drive a part or all of the vehicle body side wheel, A cutting blade that can move up and down and tilt left and right within a certain range with respect to the vehicle body, and is connected to the vehicle body via a connecting tool so that the vehicle body is towed by the vehicle body when the vehicle body moves forward. It comprises a support, a cutting blade support front wheel and a rear wheel that support and ground the cutting blade support, and a cutting blade supported by the cutting blade support.

[Action]

In the lawnmower of the present invention, when the vehicle body is moved forward, the blade supporter is towed by the vehicle body via the connecting tool, so that the blade supporter is supported as if the blade supporter is pushed from behind by the vehicle body. There is no chance that you will not be able to drive smoothly and smoothly.

In addition, the cutting blade support can move up and down with respect to the vehicle body and can tilt left and right, so that the cutting blade support that supports the cutting blade can move up and down independently of the vehicle body according to the unevenness of the ground surface. Move and tilt left and right.

Since the cutting blade support is not equipped with a power source or a power transmission mechanism for powering the vehicle body, the entire length of the cutting blade support, and thus the distance between the cutting blade support side front wheel shaft and the cutting blade support side rear wheel shaft, is reduced. Can be shortened. Therefore, even in a place having a smaller unevenness, the cutting blade can be vertically moved and tilted faithfully corresponding to the unevenness of the ground surface, so that the distance between the cutting blade and the ground surface can be maintained constant, The cutting height of grass can be made uniform.

〔Example〕

 Hereinafter, the present invention will be described based on embodiments shown in the drawings.

1 to 11 show an embodiment of the present invention. In this embodiment, the vehicle body 1 includes a vehicle body rear portion 1a and a vehicle body front portion 1b detachably fixed to the vehicle body rear portion 1a. The vehicle body front portion 1b is mainly composed of a pipe-shaped straight portion 2 extending in the left-right direction, and an arc-shaped portion 3 extending forward and obliquely downward from the straight portion 2 and both left and right ends. As best shown in FIGS. 5 and 6, a connecting cylinder 4 extending in the front-rear direction is fixed to the central portion of the straight portion 2 of the vehicle body front portion 1b, and a pin hole 5 is formed in the connecting cylinder 4. It penetrates vertically. A connecting rod 6 projecting forward is fixed to the central portion of the front portion of the vehicle body rear portion 1a, and a front pin hole 7 and a rear pin hole 8 are provided at the tip end of the connecting rod 6 in the vertical direction. Has been penetrated by. Then, the pin hole 5 of the connecting cylinder 4 is matched with either the front pin hole 7 or the rear pin hole 8 of the connecting rod 6 (the rotary brush 9 or the vertical blade 10 for thatching, which will be described later, is not attached to the lawn mower. In the case, align the pin hole 5 with the rear pin hole 8,
When mounting, the pin hole 6 is aligned with the front pin hole 7) and the pin 11 is passed through these pin holes to fix the vehicle body front portion 1b to the vehicle body rear portion 1a.

As shown in FIG. 3 and the like, a vehicle body side left rear wheel axle 12 and a right rear wheel axle 13 are provided at the rear portion of the vehicle body rear portion 1a, and these rear wheel axles 12 and 13 are mounted on the vehicle body rear portion 1a. The engine 14 is driven by a power transmission mechanism (details of the internal mechanism and the like are not shown) mounted on the vehicle body rear portion 1a including a clutch and an actuating device 15 which are not shown. And the left rear wheel axle 1
As shown in FIGS. 2 and 3, the vehicle-side left rear wheel 16 and the right rear wheel 17 are provided on the right and left rear wheel shafts 13, respectively. A handle 18 is attached to the rear portion of the vehicle body rear portion 1a.

A front wheel shaft 19 on the vehicle body side is mounted between the lower ends of the left and right arcuate portions 3 of the front portion 1b of the vehicle body.
A single roller-shaped front wheel 20 on the vehicle body side is rotatably supported by the.

Reference numeral 21 is a cutting blade support, and this cutting blade support 21 is, as will be described in detail later, a vehicle body side front wheel 20 and a vehicle body side rear wheel 1.
6 and 17, it is connected to the vehicle body 1 so as to be vertically movable and tiltable to the left and right with respect to the vehicle body 1, and is towed by the vehicle body 1 when the vehicle body 1 moves forward. ing.

As shown in FIGS. 2 and 4, the cutting blade support 21 has a front front wheel support member 25 movably supported on the left front portion and the right front portion thereof via a support plate 24, respectively. A cutting blade support side front wheel shaft 41 is attached between the lower ends of these front wheel support members 25, and one roller-shaped cutting blade support side front wheel 26 is attached to this cutting blade support side front wheel shaft 41. It is rotatably supported. At the upper end of the cutting blade support side front wheel support member 25, a knob receiving portion 2 is provided.
7, the cutting height adjusting knob 28 is fitted in the knob receiving portion 27 so as to be rotatable and non-elevable with respect to the knob receiving portion 27. The cutting height adjusting knob 28 is screwed at its lower end to a vertically extending screw rod 29 fixed to the cutting blade support 21.

Therefore, when the cutting height adjustment knob 28 is rotated, the cutting blade support side front wheel support member 25 is moved along the fixed screw rod 29.
Moves up and down with respect to the cutting blade support 21 together with the cutting height adjusting knob 28 to adjust the distance between the cutting blade support 21 and the cutting blade support-side front wheel 26, and thus the distance between the cutting blade support 21 and the ground surface 30. . Further, the cutting blade support 21 is fastened to the cutting blade support 21 by tightening the cutting blade support side front wheel support member 25 which has been moved up and down to a desired position by the rotation of the cutting height adjusting knob 28 as described above. A lock mechanism 31 that can be fixed is provided.

At the rear end of the cutting blade support 21, a cutting wheel support-side rear wheel shaft 3 is provided.
2 is attached to the rear wheel shaft 32 on the cutting blade support side
A pair of left and right rear blades 33 on the side of the cutting blade support is rotatably supported by the. The cutting blade support 21 rotatably supports a rotary blade 34 formed by combining an appropriate number of spirally bent blades. In addition, the cutting blade support 21
As shown in FIG. 2, a rotary blade cover 35 is provided so as to surround the rotary blade 34.

In addition, a receiving blade 36, which constitutes a cutting blade together with the rotary blade 34 in the present embodiment, is rotatably supported on the cutting blade support 21 coaxially with the rear wheel shaft 32 on the cutting blade support side.
The receiving blade 36 is biased counterclockwise in FIG. 2 by a spring (not shown). A handle cylinder 37 is rotatably and axially immovably supported on both left and right ends of the cutting blade support 21, and a female screw (not shown) is provided on the inner peripheral surface of the handle cylinder 37. Has been. A screw rod 38 is screwed into the female screw, and the lower end portion of the screw rod 38 is engaged with the left and right end portions of the receiving blade 36 in a non-rotatable manner around the axis of the screw rod 38. There is. Therefore, when each handle cylinder 37 is rotated by the blade adjusting handle 39 mounted near the upper end of each handle cylinder 37, each screw rod 38 moves in the axial direction to rotate the receiver blade 36, and the rotary blade 34. You can adjust the balance with.

The left and right ends of the vehicle body-side front wheel shaft 19 of the cutting blade supporter-side front wheel shaft 41 are connected via connecting members 40 whose both ends constitute a universal joint, as described in detail below. The cutting blade supports 21 are connected to the left and right ends, so that when the vehicle body 1 moves forward, the cutting blade support body 21 is pulled by the vehicle body via the coupling tool 40. As shown in FIGS. 7 and 8, the connector 40 includes a rod body 42, a compression coil spring 43, a cover 44, a C ring 45, a nut 46, a rod body 47, and a compression coil spring 48. , A cover 49 and a C ring 50. A spherical recess 51 is provided near the front end of the rod 42, and a step 52 near the rear end of the rod 42.
Is provided. The spring 43 is fitted in the rod body 42, and its rear end portion is brought into contact with the step portion 52. The cover 44 is in the form of a sleeve provided with slits 53, is fitted to the rod 42, and its rear end is brought into contact with the front end of the spring 43. A C-ring 45 is attached to the front end of the rod 42, and the cover 44 is biased by the spring 43 toward the C-ring 45.

As shown in FIG. 7, both ends of the vehicle body side front wheel shaft 19 are spherical, and a thin neck portion 19b is formed at the base of the spherical portion 19a. The spherical portion 19a of the vehicle body side front wheel shaft 19 manually pushes the cover 44 in the direction of arrow A in FIG. 7 (at this time, the spring 43 is compressed) to move the cover 44 to a position not covering the recess 51. It is inserted in the recess 51 in the state of being made. Then, when the hand is released, the cover 44 causes the C ring 4 to move by the force of the spring 43.
5. Returning to the position where it abuts 5, the concave portion 51 is covered and the spherical portion 19
A cannot be separated from the recess 51 (at this time, the slit 53 is fitted to the neck portion 19b of the vehicle body side front wheel shaft 19). The joint portion between the vehicle body-side front wheel shaft 19 and the rod body 42 constitutes one universal joint.

A male screw 56 is provided on the front end side of the rod body 47, and the male screw portion 56 is coaxially screwed to the rod body 42. Then, by rotating the male screw portion 56 with respect to the rod body 42 and changing the screwing length of the male screw portion 56 and the rod body 42, the total length of the connector 40 can be adjusted. The nut 46 fixes the screwing length by being tightened after the screwing length is adjusted.

A step portion 58 is provided near the root of the male screw portion 56 of the rod body 47, and a spherical recess 59 is provided near the rear end portion of the rod body 47. The spring 48 is fitted in the rod 47 so that its front end portion is brought into contact with the step portion 58. The cover 49 is in the form of a sleeve provided with a slit 60, is fitted to the rod 47, and has its front end abutted against the rear end of the spring 48. A C-ring 50 is attached to the rear end of the rod 47, and the cover 49 is biased by the spring 48 toward the C-ring 50.

Both ends of the cutting wheel support-side front wheel shaft 41 are on the vehicle body side front wheel shaft 1.
Similar to the case of No. 9, each has a spherical shape, and a spherical neck portion 41a and a thin neck portion 41b are formed at the base.
The spherical portion 41a of the cutting blade support-side front wheel shaft 41 has a recess 59 in the same manner as the spherical portion 19a of the vehicle body-side front wheel shaft 19.
Inserted inside. The connecting portion of the cutting blade support side front wheel shaft 41 and the rod body 47 constitutes one universal joint.

As shown in FIGS. 1, 5 and 6, a support rod 22 is fixed to the central portion of the vehicle body rear portion 1a so as to project forward below the connecting rod 6.
On the other hand, a U-shaped fitting member 23 is provided on the cutting blade support 21.
However, it is fixed with its U-shape turned upside down. The fitting member 23 is loosely fitted to the support rod 22, so that the cutting blade support 21 can move up and down with respect to the vehicle body 1 within a certain range and can rotate about the support rod 22 in all directions. ing.

As described above, the cutting blade support body 21 is linked to the vehicle body 1 through the connecting tool 40, the fitting member 23, and the connecting rod 22, so that the cutting blade support body 21 moves up and down within a certain range with respect to the vehicle body 1 as described above. It is connected to the vehicle body 1 so as to be movable and tiltable to the left and right, and is pulled by the vehicle body 1 when the vehicle body 1 moves forward.

The shaft 34 a of the rotary blade 34 is connected to an output shaft 62 of a belt transmission device 61 (internal mechanism not shown) provided on the cutting blade support 21. On the other hand, the input shaft 63 (see FIG. 9) of the belt transmission device is a universal joint 64.
Also, it is connected to the engine 14 via an input shaft 65 (see FIG. 3) of the differential device 15.

The handle 18 includes an accelerator lever 66 for adjusting the rotation speed of the engine 14, a clutch lever 67 for turning on and off the clutch (not shown) interposed between the engine 14 and the rotary blade 34, and a vehicle body side. Rear wheels 16, 17
A brake lever 68 for operating a brake (not shown) for braking the vehicle is attached.

Projection portions 69 projecting obliquely upward are provided at both left and right ends of the vehicle body front portion 1b, and these projection portions 69 are provided on both sides of the cutting waste container 70 (only shown in FIGS. 2 and 11). The cutting waste container 70 is fixed to the vehicle body front part 1b by being inserted in the insertion part 71 provided in the surface.

Next, the differential of this embodiment will be described.

The differential device 15 mounted on the vehicle body 1 by the engine 14
Rear wheels 16, 1 on the vehicle body side via the power transmission mechanism including
When 7 is driven and rotated in the direction of arrow B in FIG. 2, this lawnmower advances on the ground surface 30. At this time, the driver
At the rear of the vehicle body 1, the handle 18 is grasped to control the traveling direction of the vehicle body 1, and follow the vehicle body 1 while walking.

When the vehicle body 1 moves forward as described above, it is pulled by the vehicle body side front wheel shaft 19 via the coupling tool 40, so that the cutting blade support body 21 also rolls the cutting blade support body side front wheel 26 and the rear wheel 33. While moving forward with the car body 1.

When lawn mowing is desired, the rotary blade 34 is moved in the direction of arrow C in FIG. 2 by the engine 14 via the universal joint 64 (see FIG. 9) and the belt transmission device 61 mounted on the blade support 21. Drive to rotate. Then, the lawn is cut and the lawn is mowed by the rubbing of the rotary blade 34 and the receiving blade 36.

Further, the cutting waste generated by cutting the lawn in this way is blown off by the rotation of the rotary blade 34, guided by the rotary blade cover 35, and stored in the cutting waste storage container 70.

Here, in this lawnmower, the cutting blade support 21 is towed by the vehicle body 1 via the coupling tool 40 when the vehicle body 1 moves forward, so that the cutting blade support 21 is pushed by the vehicle body 1 from the rear side. Moreover, the cutting blade support 21 does not slip forward and cannot smoothly travel.

Further, since the cutting blade support 21 is vertically movable with respect to the vehicle body 1 and can be tilted left and right, the cutting blade support 2
1 vertically moves and tilts left and right independently of the vehicle body 1 according to the unevenness of the ground surface 30. Since the engine 14 for driving the vehicle body 1 and the power transmission mechanism are not mounted on the cutting blade support 21, the entire length of the cutting blade support 21, that is, the cutting blade support side front wheel shaft 26 and the cutting blade support side rear wheel shaft 33. The interval between and can be shortened. Therefore, even in a place where the ground surface has small unevenness, the rotary blade 34 and the receiving blade 36 vertically move and incline corresponding to the unevenness of the ground surface 30, and the rotary blade 34 and the receiving blade 36 and the ground surface 30 The intervals can be kept constant, and the lawn cutting height can be made uniform.

In addition, the cutting height of the turf is adjusted by rotating the cutting height adjusting knob 28 as described above to adjust the distance between the cutting blade support 21 and the ground surface 30, and thus the distance between the rotary blade 34 and the receiving blade 36 and the ground surface 30. It can be adjusted by changing.

In addition, in the present embodiment, the cutting blade support 21 is connected to the vehicle body 1 via the U-shaped fitting member 23 and the connecting rod 22 as well as the connecting tool 40 for towing. At this time, it is not necessary to connect the fitting member 23 and the connecting rod 22.
In the present embodiment, the cutting blade support 21 and the vehicle body 1 are also connected by the U-shaped fitting member 23 and the connecting rod 22 because the handle 18 is changed in order to greatly change the traveling direction of the vehicle body 1. When the front side of the vehicle body 1 is lifted by pushing down and the vehicle body side front wheel 20 is lifted from the ground surface 30, the cutting blade support body 21 is in front of the vehicle body 1 via the connecting rod 22 and the fitting member 23. This is because it is lifted up to the side of the vehicle and lifted up together with the front side of the vehicle body 1 to be separated from the ground surface 30.

Further, in the present embodiment, when the lawnmower is moved to the place where the lawn mowing is to be performed, as shown in FIG.
A tire 91 having a larger diameter is attached to the vehicle body side rear wheel portions 12 and 13, and these tires 9 are used instead of the vehicle body side rear wheels 16 and 17.
1 is brought into contact with the ground surface 30, and the engine 14 causes the tire 91 through the vehicle body side rear wheel shafts 12 and 13.
This lawn mower can be moved quickly by driving and rotating.

Further, the lawn mowing methods are roughly classified into horizontal mowing parallel to the ground surface 30 (horizontal) and vertical mowing perpendicular to the ground surface 30. Usually, the former horizontal mowing is mainly performed, and lawn mowing by the combination of the rotary blade 34 and the receiving blade 36 is also horizontal mowing.

However, the grass is too dense, there are leaves lying sideways for a long time, the foliage is low and spreads laterally, and the ground surface 3
If thatch (organic residue mainly composed of dead grass and cuttings) accumulates at 0, it has a bad influence on the growth of grass, so it is necessary to perform the latter vertical cutting at an appropriate frequency.

FIG. 10 shows a state in which the vertical blade 10 is attached to the cutting blade support 21 for the purpose of performing such vertical cutting. In this case, in order to provide a space for mounting the vertical blade 10, the pin hole 5 of the connecting cylinder 4 is aligned with the front pin hole 7 of the connecting rod 6 as shown in FIG. By inserting 11 through, the vehicle body front portion 1b is fixed to the vehicle body rear portion 1a in a state where the distance between the vehicle body side front wheel 20 and the rotary blade 34 is slightly lengthened. A rotary member 74 is rotatably supported on both left and right ends of the cutting blade support 21 coaxially with the rotary blade shaft 34a. A vertical blade shaft 75 is rotatably supported between the rotating members 74, and the vertical blade shaft 75 has gears 76,
The rotary blade shaft 34a is linked via 77, 78 and 79. The gears 78 and 79 can be disengaged from each other as desired. A large number of vertical blades 10 having a proper number of radially extending blade edges are attached to the vertical blade shaft 75 in a direction perpendicular to the vertical blade shaft 75 with spacers (not shown) at appropriate intervals. There is.

Further, instead of the support plate 24, a support plate 80 is used as the cutting blade support 21.
Attach to. In the same manner as in the case of the support plate 24 when the vertical blade 10 is not attached to these support plates 80, the cutting blade support side front wheel support members 25 are respectively supported so as to be able to move up and down, and the lower end portions of these front wheel support members 25 are supported. A roller-shaped front blade 26 on the side of the cutting blade support is rotatably supported therebetween. Further, a knob receiving portion 81 is integrally provided on the support plate 80, and the knob receiving portion 81 has
The vertical blade height adjusting knob 82 is fitted to the vehicle body 1 in an obliquely vertical direction so as to be rotatable but not axially movable. The vertical blade height adjusting knob 82 is screwed into a screw rod 83, and the lower end portion of the screw rod 83 is turned by the rotating member 7.
4 is supported so as to be rotatable around an axis parallel to the vertical blade shaft 75.

Therefore, when the vertical blade height adjusting knob 82 is rotated, the screw rod 83 moves in the axial direction to rotate the rotating member 74, so that the height of the vertical blade 10 is adjusted. It should be noted that the rotation position of the rotation member 74, and thus the height of the vertical blade 10, is fixed by tightening and fixing the connection portion between the rotation member 74 and the screw rod 83. A lock mechanism 84 is provided for this purpose.

In the present embodiment, the rotary blade shaft 34a to the gears 79, 78, 7
Power is transmitted through 7,76 and the vertical blade shaft 75,
By rotating the vertical blade 10 in the direction of arrow D in FIG. 10, the above-mentioned vertical cutting is performed to cut a leaf that is lying sideways for a long time or a foliage that has spread to a low side, and the ground surface 30 The thatch accumulated in can be scraped out.

Further, in this embodiment, the rotary brush 9 as shown in FIG. 11 can be attached to the rotating member 74 instead of the vertical blade shaft 75. When such a rotary brush 9 is attached, of course, the vertical cutting is not performed, but the lawn pressed by the front wheels 20, 26 on the vehicle body side and the cutting blade support side rotates in the opposite direction to these front wheels. Since the turf that has been raked by 9 is immediately cut by the rotary blade 34 and the receiving blade 36, horizontal mowing is satisfactorily performed and the lawn size is adjusted.

〔The invention's effect〕

As described above, the lawnmower according to the present invention has an excellent effect that the lawn cutting height can be made uniform and smooth traveling can be performed even in a place where the ground surface has small irregularities.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a lawnmower according to the present invention,
2 is a side view showing the embodiment, FIG. 3 is a perspective view showing a rear portion of a vehicle body in the embodiment, FIG. 4 is a perspective view showing a cutting blade support side portion in the embodiment, FIG. FIG. 6 is a perspective view showing a connecting portion between a vehicle body front portion and a vehicle body rear portion in the embodiment, and FIG. 7 is a perspective view showing a connecting portion between the vehicle body side front wheel shaft and the cutting blade support side front wheel shaft in the embodiment. FIG. 8 is an exploded perspective view showing a connecting tool used for the connecting portion, and FIG. 9 is a perspective view showing a universal joint portion for transmitting power between the vehicle body side and the cutting blade support side in the embodiment. FIG. 10 is a side view showing the front portion of the vehicle body and the cutting blade support side portion in the state in which the vertical blade is mounted in the embodiment, and FIG. 11 is the vehicle body front portion and the cutting in the state in which the rotating brush is mounted in the embodiment. It is a side view showing a blade support side portion. . 1 ... Car body, 14 ... Engine, 15 ... Differential device, 1
6 ... left rear wheel on the vehicle body side, 17 ... rear right wheel on the vehicle body side, 20 ...
Front wheel of vehicle body, 21 ... Cutting blade support, 22 ... Support rod, 2
3 ... Fitting member, 26 ... Cutting wheel support side front wheel, 30 ...
Ground surface, 33 ... rear wheel of cutting blade support, 34 ... rotary blade,
36 ... Receiving blade, 40 ... Connecting tool.

Claims (2)

[Claims] 1. A vehicle body, a vehicle body side wheel for supporting the vehicle body and grounding, a power source and a power transmission mechanism mounted on the vehicle body for driving a part or all of the vehicle body side wheel, and the vehicle body. On the other hand, a cutting blade support that is vertically movable and tiltable right and left within a certain range, and that is connected to the vehicle body via a connecting tool so that the vehicle body can be pulled by the vehicle body when the vehicle body moves forward. A lawn mower comprising a cutting blade support side front wheel and a rear wheel that support and ground the cutting blade support, and a cutting blade supported by the cutting blade support. 2. The cutting blade support is connected to the vehicle body side even at a portion different from the connecting tool so that when the vehicle body side is lifted above a certain level, the cutting blade support body is lifted to the vehicle body side and separated from the ground surface. The lawnmower according to claim 1.