JP5826883B2 - Rechargeable lawn mower - Google Patents

Description

  The present invention relates to a rechargeable lawn mower that rotates a cutter to cut turf grass by rotation of a motor that uses a battery as a power source.

Usually, the rechargeable lawn mower includes a motor that drives a cutter that cuts turf grass, a battery that supplies power to the motor, a control device that controls the driving of the motor, and the like.
For this reason, it has been necessary to protect the motor, the battery, the control device, and the like from water from wet turf grass and dust from cutting the turf grass.

  Therefore, in order to protect the motor, battery, etc. from rain water, water from wet turf, and dust when cutting turf grass, a motor, a battery that supplies power to the motor, and a controller that controls the operation of the motor are cutters. The upper surface of the cutter housing is covered with an upper cover (housing cover) pivotally supported so that it can be opened and closed, and the upper surface of the cutter housing and the lower edge of the upper cover are brought into close contact with each other. A technique is known in which a motor / battery and a control device are housed in a storage room (waterproof / dustproof space) (see Patent Document 1 below).

JP-A-10-84738

However, in the technique described in the above technical document, since the battery is stored directly on the upper surface of the cutter housing, it is possible to prevent rainwater and dust from entering from the close contact portion between the cutter housing and the upper cover. To prevent water from cutting the wet turf from the cutter housed in the machine and dust such as chips from entering the battery compartment through the ventilation path for cooling the motor or the gap between parts. There is a problem that can not be.
In addition, there is a problem that even if the upper surface of the cutter housing and the lower edge of the upper cover are in close contact with each other, variations in the dimensions of the parts such as the cutter housing and the upper cover do not provide uniform contact, and sufficient waterproofing and dustproofing cannot be performed. .

  Therefore, the present invention can reliably protect the battery of the rechargeable lawn mower not only from rainwater and dust, but also from water caused by cutting the wet grass of the cutter, dust such as chips, It is an object of the present invention to provide a rechargeable lawn mower that can reliably protect against rainwater and dust even if there are variations in parts configured for waterproofing and dustproofing.

The rechargeable lawn mower according to the present invention has a motor that is rotated by power supplied from a battery, and a cutter that is driven by the rotation of the motor to cut grass, and the upper surface of the cutter housing that houses the cutter is a housing. An upper cover that is covered with a cover and that has an opening at the bottom is provided on the housing cover so as to be able to rotate in the vertical direction so as to cover the upper surface of the housing cover. The battery is attached to and detached from the upper surface of the housing cover. capable and protrusions surrounding the battery is formed with the mounting, upper cover has Tsu covering the battery and the convex portions from the upper side, the upper surface of the battery mounted on the upper surface of the housing cover Is inclined with the rotation center side of the upper cover as a lower side .

  In the rechargeable lawn mower according to the present invention, a wall facing the projection can be formed on the inner surface of the upper cover.

  The rechargeable lawn mower of the present invention not only protects the battery against rainwater and dust, but also ensures protection against water and dust by cutting the wet turf grass of the cutter, and is also waterproof and dustproof. Therefore, there is an advantage that even if there is some variation in the parts configured for this purpose, it can be reliably protected from rainwater and dust.

It is a side view of the rechargeable lawn mower in the present embodiment. It is a cross-sectional side view of the rechargeable lawn mower in the present embodiment.

  Hereinafter, an embodiment of a rechargeable lawn mower according to the present invention will be described with reference to the drawings. FIG. 1 is a side view of a rechargeable lawn mower in the present embodiment. FIG. 2 is a cross-sectional side view of the rechargeable lawn mower in the present embodiment.

  As shown in FIG. 1, the rechargeable lawn mower 1 is located at the front of the main body 2 and the front of the main body 2 and in the front wheel 6 consisting of a pair of left and right wheels (in the direction perpendicular to the plane of FIG. 1). A cylindrical rear wheel 7 extending left and right is provided. At the rear part of the main body 2, a pair of support handles 8 that are rotatably supported on both sides of the main body 2, a grip 9 provided at the tip of the pair of support handles 8, and a grip 9 are provided. A handle portion 11 including a switch 10 that activates a motor 14 to be described later by a pulling operation of an operator is provided so as to be rotatable within a predetermined range in the front-rear direction.

  Further, in front of the grip portion 9 of the handle portion 11, a control box 12 that houses a control device (not shown) that controls a motor 14 to be described later and that has a display portion that displays the remaining amount of the battery and the like is provided. ing. Thus, by providing the control box 12 at a position away from the main body 2, it is easy to protect the control device and the like from heat from the motor 14 and dust such as chips.

  A glass catcher 13 for storing the cut turfgrass is detachably attached to the rear end of the main body 2.

  Next, as shown in FIGS. 1 and 2, the main body 2 includes a motor 14 provided with a rotating shaft 14a disposed in the left-right direction (a direction perpendicular to the plane of FIG. 1 and FIG. 2), A cutter housing 3 that is provided in parallel to the rotating shaft 14a of the motor 14 and houses a reel blade cutter 15 that is driven via a pulley (not shown) and covers the upper surface of the cutter housing 3. The housing cover 4 and an upper cover 5 that covers the upper surface of the housing cover 4 are configured.

  The cutter housing 3 is a box-like body having an opening at the lower side (the ground side) and the rear side, and the cutter 15 is attached to the lower opening so that its attachment position can be adjusted in the vertical direction. Turf grass cut by the cutter 15 is discharged to the glass catcher 13 from the rear opening 3b.

  The upper part of the cutter housing 3 is formed by a top plate 3a extending from the front to the rear, a part of which opens, and a motor support plate 20 is fixed to the opening by a screw (not shown) to close the opening. Yes. A two-part motor housing 21 in which the motor 14 is housed is fixed to the upper portion of the motor support plate 20 with screws (not shown). The motor housing 21 is provided with a ventilation path (not shown) for cooling the motor 14. This ventilation path leads to a space 22 formed by the cutter housing 3 and the housing cover 4 covering the upper surface of the cutter housing 3, and further leads to a cooling air intake 4 e formed on the side surface of the housing cover 4. Cooling air is taken in from the outside. The motor 14 is rotated by a small pulley (not shown) fixed to the rotating shaft 14a of the motor 14, a large pulley (not shown) fixed to the rotating shaft 15a of the cutter, and a belt (not shown). And the cutter 15 is driven.

  The top surface of the top plate 3a of the cutter housing 3 is covered with a housing cover 4 made of a box-like body that opens downward. The housing cover 4 is fixed to the top plate 3a of the cutter housing 3 with a plurality of screws 42 with the opening side down. A hook portion 4b for locking the glass catcher 13 is integrally formed at the rear end portion of the housing cover 4.

  On the rear upper surface of the top plate 4a of the housing cover 4, a terminal box 41 having a terminal for connecting a terminal of the battery pack 16 in which the battery pack 17 is housed and a power line connected to the control device is screwed. It is fixed at 43. The battery pack 16 is attached or detached by inserting or removing the connection terminal of the battery pack 16 into or from the terminal of the terminal box 41. The battery pack 16 corresponds to the battery in the present invention.

  On the top surface of the top cover 4a of the housing cover 4 from the substantially center to the rear end, a convex portion 4c having one side surface formed as an inclined surface 4d and the other side surface formed perpendicularly surrounds the entire circumference of the battery pack 16. Formed in the range.

  The upper surface of the top plate 4a of the housing cover 4 is covered with a substantially bowl-shaped upper cover 5 that opens downward. A convex portion 4c formed on the top plate 4a of the housing cover 4 is formed on the surface from the substantially central side on the opening side of the upper cover 5 to the rear end toward the top surface of the top plate 4a of the housing cover 4. A vertical wall 5a is formed at a position opposite to. The lower end of the vertical wall 5a is formed on the inclined surface 5b. An inlay is formed by closely fitting the inclined surface 5b of the wall 5a of the upper cover 5 and the inclined surface 4d of the convex portion 4c of the housing cover 4 so as to be in close contact with each other.

  The spigot in this embodiment forms a convex portion 4c having an inclined surface on one side surface on the top surface of the top plate 4a of the housing cover 4, and an inclined surface 5b on the lower end of the wall 5a of the upper cover 5. However, a V-groove may be formed on the top surface of the top plate 4 a of the housing cover 4, and the lower end of the wall 5 a may be V-shaped, or a reverse V-shape may be formed on the top surface of the top plate 4 a of the housing cover 4. A convex portion may be formed and an inverted V-shaped groove may be formed at the lower end of the wall 5a, and the shape of the spigot is not particularly limited.

Further, a pair of support shafts 5 d are integrally formed on both sides of the rear end of the upper cover 5. The support shaft 5d is rotatably inserted into a pair of holes formed at the rear end of the housing cover 4 (not shown). The upper cover 5 rotates up and down around the support shaft 5d.
Further, a locking projection 5 c is integrally formed at the tip of the upper cover 5. On the other hand, a locking lever 19 is provided at the front end of the housing cover 4 so as to be rotatable about the support shaft 19a at a position facing the locking protrusion 5c. The locking lever 19 is formed with a locking recess 19b that engages with the locking protrusion 5c. In addition, the locking lever 19 is always centered around the support shaft 19a by a spring 19c so that the locking projection 5c is reliably engaged with the locking recess 19b in a state where the upper cover 5 is closed. In the figure, it is urged clockwise.

  When the battery pack 16 is taken out, the end of the locking lever 19 opposite to the locking recess 19b is pushed down and rotated to release the locking projection 5c from the locking recess 19b. The battery pack 16 can be taken out by lifting and rotating to open.

  As described above, the storage chamber 18 of the battery pack 16 according to the present invention includes the upper surface of the top plate 4a of the housing cover 4, the convex portion 4c in the range surrounding the entire periphery of the battery pack 16 formed on the upper surface, the upper cover 5, It is formed by a wall 5a formed inside the upper cover 5 at a position facing the convex portion 4c of the battery pack 16, and further, an inclined surface 4d of the convex portion 4c and an inclined surface 5b at the lower end of the wall 5a. And inlays.

  By fitting the spigot, the storage chamber 18 of the battery pack 16 according to the present invention can ensure a sealed state even if there is some variation in the dimensions of parts such as the housing cover 4 and the upper cover 5. The battery pack 16 can be protected from dust and dust.

Further, the storage chamber 18 of the battery pack 16 of the present invention is separated from the cutter 15 by the top plate 3a of the cutter housing 3 and the top plate 4a of the housing cover 4 provided on the top surface of the top plate 3a. As a result, it is possible to reliably prevent water such as turf cut by the cutter 15 and dust such as chips from entering the inside.
Furthermore, since it is isolated from the motor 14 by the top plate 4 a of the housing cover 4, the battery pack 16 can be reliably protected from the heat of the motor 14.

  In this embodiment, the present invention is applied to a rechargeable lawnmower having a reel blade type cutter or a rechargeable lawnmower in which a motor is disposed horizontally (the rotation axis of the motor is disposed parallel to the ground). The present invention can also be applied to a rechargeable lawn mower having a disk-shaped cutter, and a rechargeable lawn mower in which a motor is arranged vertically (the rotation axis of the motor is arranged perpendicular to the ground).

DESCRIPTION OF SYMBOLS 1 Rechargeable lawn mower, 2 main part, 3 cutter housing, 4 housing cover, 4d inclined surface, 5 upper cover, 5b inclined surface, 16 battery pack (battery), 18 storage chamber

Claims (2)

In a rechargeable lawn mower having a motor that is rotated by power supply from a battery and a cutter that is driven by the rotation of the motor to cut grass.
The upper surface of the cutter housing that houses the cutter is covered with a housing cover, and an upper cover having an opening below is provided on the housing cover so as to be rotatable in the vertical direction so as to cover the upper surface of the housing cover.
On the upper surface of the housing cover, the battery is detachably mounted and a convex portion surrounding the battery is formed,
Upper cover has Tsu covering the battery and the convex portion from above,
The rechargeable lawn mower characterized in that the upper surface of the battery mounted on the upper surface of the housing cover is inclined with the rotation center side of the upper cover as a lower side .   The rechargeable lawn mower according to claim 1, wherein a wall facing the convex portion is formed on the inner surface of the upper cover.

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