Autonomous lawnmower

Abstract

To provide an autonomous lawnmower that can reduce abnormal noise during grass cutting. [Solution] The autonomous lawnmower 10 comprises a cutting blade disc 12 driven by a motor 18, at least one cutting blade 11 attached to the cutting blade disc 12, a cutting blade upper and lower plate 14 on which the motor 18 is installed, a cutting blade upper and lower drive shaft 15 that can arbitrarily set the height of a fixed support column 16 installed on a cutting blade base plate 13 and the cutting blade upper and lower plate 14, the cutting blade upper and lower drive shaft 15 and a cutting blade upper and lower guide 19 that communicate with the cutting blade base plate 13 and the cutting blade upper and lower plate 14, and a clamp mechanism 17 provided on the cutting blade upper and lower plate 14 that presses the fixed support column 16 to lock the guide gap.

Description

Technical Field

[0006] ,

[0004] , , , , , ,

[0005] , , , , ,

[0003] , , , , , , ,

[0001] The present invention relates to an autonomous lawn mower.

Background Art

[0002] Patent Document 1 describes a self-propelled lawn mower having a mechanism for changing the mowing height by changing the wheel angle and the height of the center of the device.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the guide mechanism for changing the cutting blade height of mowing, high-speed rotation of the cutting blade is required for mowing, and a gap for operating the guide mechanism of the height change mechanism is required. Impact noise is likely to occur in the guide gap due to the high-speed rotation of the cutting blade. As a countermeasure, it is necessary to move a heavy part that can suppress the vibration of the cutting blade rotation, and there is a problem that the weight of the entire device increases, such as an increase in the weight of the height change mechanism, an increase in driving force, and an increase in the battery.

Means for Solving the Problems

[0007] [Figure 1] This is a perspective view showing the internal configuration of an autonomous lawnmower according to Embodiment 1. [Figure 2] This is a top view showing the internal configuration of an autonomous lawnmower according to Embodiment 1. [Figure 3] This is a perspective view of the autonomous lawnmower according to Embodiment 1. [Modes for carrying out the invention]

[0008] Embodiment 1 Embodiments of the present invention will be described below with reference to the drawings. Figure 1 is a perspective view showing the internal configuration of an autonomous lawnmower according to Embodiment 1. Figure 2 is a top view showing the internal configuration of an autonomous lawnmower according to Embodiment 1. In Figure 1, the autonomous lawnmower 10 includes a cutting blade 11, a cutting blade disc 12, a cutting blade base plate 13, a cutting blade upper and lower plate 14, a cutting blade upper and lower drive shaft 15, a fixed support column 16, a clamping mechanism 17, a motor 18, and a cutting blade upper and lower guide 19.

[0009] The cutting blade 11 is a blade used to cut grass growing on the ground. The cutting blade 11 is attached to the end of the cutting disc 12.

[0010] The cutting blade disc 12 is a disc that rotates under the drive of the motor 18.

[0011] The cutting blade base plate 13 is a base plate that is fixed to the autonomous lawnmower.

[0012] The upper and lower cutting blade plate 14 is a plate on which the motor 18 is fixed. The upper and lower cutting blade plate 14 has a through hole through which the upper and lower cutting blade guide 19 passes, and is structured to move up and down along the fixed support column 16. This structure allows the height of the cutting blade 11, the cutting blade disc 12, and the motor 18 to be changed.

[0013] The cutting blade vertical drive shaft 15 is a columnar shaft. The cutting blade vertical drive shaft 15 is connected to the cutting blade vertical plate 14. The cutting blade vertical drive shaft 15 can be used to arbitrarily set the height of the cutting blade vertical plate 14 using a trapezoidal screw or the like.

[0014] The fixed support column 16 is a columnar object that has the fixed support column 16 fixed to its lower end and the cutting blade upper / lower guide 19 fixed to its upper end. This structure defines the range of vertical movement of the cutting blade upper / lower plate 14.

[0015] The clamping mechanism 17 is provided on the upper and lower cutting blade plates 14 and is a mechanism that presses against the fixed support column 16 to lock the guide gap. As shown in Figure 2, the clamping mechanism 17 and the fixed support column 16 are positioned on the extension of the tangent 22 at the upper and lower cutting blade guide 19 of the guide position circle 21 centered on the upper and lower cutting blade drive shaft 15. Due to this positional relationship, the clamping mechanism 17 can properly press against the fixed support column 16. As a result, the clamping mechanism 17, which locks the guide gap, presses against the fixed support column 16, and the reaction force from this presses down on the guide gap, thereby suppressing the impact noise.

[0016] The motor 18 is an electric motor that rotates the cutting blade disc 12 via a rotating shaft connected to the cutting blade disc 12.

[0017] The upper and lower blade guide 19 is a columnar shaft. The upper and lower blade guide 19 passes through a through hole in the upper and lower blade plate 14, and defines the direction of movement of the upper and lower blade plate 14 in the vertical direction.

[0018] Figure 3 is a perspective view of an autonomous lawnmower according to Embodiment 1. As shown in Figure 3, by arranging the cutting blade 11 and the cutting blade disc 12 at the bottom of the vehicle body having a continuous track 31, it is possible to cut grass growing on the ground.

[0019] According to the self - propelled lawn mower of Embodiment 1 as described above, by pressing against the fixed part with the clamp mechanism, the guide gap can be suppressed and fixed, so that abnormal noise during mowing can be reduced. Also, with this clamp mechanism, it is not necessary to increase the weight of the device, so the overall weight of the device can be reduced, and the driving force during device travel can be reduced. As a result, the motor capacity and battery capacity can be reduced, and cost reduction can be achieved.

[0020] Note that the present invention is not limited to the above - described embodiment, and can be appropriately modified without departing from the gist. For example, the number of cutting blades attached to the cutting blade disk is not particularly limited. When attaching two or more cutting blades to the cutting blade disk, it is desirable to attach them so that the rotation center of the cutting blade disk becomes the center of gravity.

Explanation of Signs

[0021] 10 Self - propelled lawn mower: 11 Cutting blade: 12 Cutting blade disk: 13 Cutting blade base plate: 14 Upper and lower cutting blade plates: 15 Upper and lower cutting blade drive shaft: 16 Fixed support column: 17 Clamp mechanism: 18 Motor: 19 Upper and lower cutting blade guide

Claims

[Claim 1] A motor-driven cutting blade disc, At least one cutting blade attached to the cutting blade disc, The upper and lower cutting blade plates on which the motor is installed, A cutting blade vertical drive shaft that allows the height of the upper and lower cutting blade plates to be set arbitrarily, The cutting blade base plate and the cutting blade upper and lower plates are connected to the cutting blade upper and lower drive shaft and the cutting blade upper and lower guide, The fixed support post installed on the cutting blade base plate and An autonomous lawnmower equipped with a clamping mechanism on the upper and lower cutting blade plates that presses against the fixed support column to lock the guide gap.

Images