JP2016049048A - Lawn mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lawn mower that autonomously moves and performs lawn mowing based on a preset operation program, in which a conventional autonomous mobile type lawn mower has a dedicated battery built-in, and a hand lawn mower using a battery separate from the built-in battery and used as a power supply for an electric tool, and a handheld brushcutter are used, when a complete lawn mowing is not made at a wall side and a boundary of a working area, and therefore an un-mown portion cannot be cut quickly, accordingly, the present invention provides an autonomous mobile type lawn mower that is free from these problems and is enhanced in handling efficiency.SOLUTION: A lawn mower is configured to use a charging type battery 30 used as a power supply of an electric tool such as a screwing machine as a power supply. The battery 30 can be used as the power supply repeatedly by being removed and charged separately with a charger, so that the need for a conventional charging station is eliminated. Also, a high operating rate can be achieved by replacing the battery 30.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electric lawn mower mainly used for lawn mowing work.

  As an electric lawn mower that rotates a mowing blade by an electric motor, a lawn mower that autonomously runs on the basis of predetermined operation control is provided. Techniques relating to this autonomously traveling lawn mower are disclosed in the following patent documents. According to this autonomously traveling lawnmower, it is not necessary for the user to push and move it by hand, unlike the former hand-held lawn mower, so that the lawn mowing work can be performed almost unattended.

Japanese Patent No. 2916320 Japanese Patent No. 4246701 JP 2012-94123 A

  Apart from the unmanned lawn mower, for example, a rechargeable electric tool using a rechargeable battery as a power source is widely used for a hand-held screw tightener or a cutting tool. The battery of this type of electric tool can be repeatedly used by removing it and charging it with a separately prepared charger. For example, an 18V lithium ion battery is used as this battery. As described above, the conventional unmanned lawn mower incorporates a dedicated battery and operates autonomously according to an operation program.

  Even with this operation, it is not possible to completely cut grass, such as near the wall or the boundary of the work area, and there are cases where uncutting occurs. In order to cut this leftover with a hand-held lawn mower using a widely used battery for electric tools or a hand-held type mower, the power tool must be separated from the unmanned lawn mower battery. It was necessary to prepare a battery to be used as a power source.

  Further, when the battery is automatically charged by moving to a predetermined charging position, there is a problem that the mowing work cannot be performed during the charging time.

  An object of the present invention is to provide an unmanned lawn mower that can operate autonomously and perform unmanned lawn mowing work, and that can use a battery used as a power source of an electric tool as a power source. .

  The above-described problems are solved by the following inventions. 1st invention is a lawn mower which can operate | move autonomously, Comprising: The rechargeable battery used as a power supply of an electric tool can be used as a power supply.

  According to the first aspect, when the battery needs to be charged, the battery can be repeatedly used as a power source by removing the battery and charging with a separately prepared charger.

  According to this, between the autonomously-operated lawn mower and the manually-movable lawn mower or hand-held mower using a battery for an electric tool that is trimmed while the user moves and operates by hand. The battery can be shared.

  For this reason, for example, when performing a mowing work with a lawn mower, such as a hairline that has been mowed with the autonomously-operated lawn mower, the battery removed from the autonomously-operated lawn mower is used as it is. Can be used as a power source, and in this respect, the handling of the autonomously operated lawn mower can be improved.

  Further, conventionally, lawn mowing work cannot be continued during charging at the charging station, whereas according to the lawn mower according to the first invention, lawn mowing work is performed by replacing the battery with another charged one. In this respect, the operating rate of the lawn mower can be increased.

  A second invention is a lawnmower according to the first invention, comprising a main body case and a drive motor disposed in the main body case and driving at least one wheel using a battery as a power source. According to the second invention, the autonomously operated lawn mower moves by rotating at least one wheel using the battery as a power source.

  A third invention is a lawn mower according to the second invention, comprising a pair of left and right drive wheels, and a battery attachment portion for attaching a battery between the drive wheels. According to the third invention, a battery occupying a relatively large weight is attached between the left and right drive wheels. Since the weight balance of the lawn mower is appropriately taken by arranging a heavy battery between the driving wheels, it is possible to stabilize traveling performance such as straightness of the lawn mower.

  According to a fourth aspect of the present invention, in the second aspect of the invention, the main body case is provided with a power cover that can be opened and closed, and a battery mounting portion for mounting the battery is provided in the battery housing space formed between the power cover and the main body case. It is a lawn mower equipped. According to the fourth invention, the battery can be attached to and detached from the battery attachment portion by opening the power supply cover.

  A fifth aspect of the invention is a lawn mower according to the fourth aspect of the invention, wherein the power source cover is provided with the battery mounting portion. According to the fifth aspect, the battery can be attached to and detached from the battery attachment portion by opening the power supply cover.

  6th invention is a lawn mower provided with the key for locking the closed state of a power supply cover in 4th or 5th invention. According to the sixth aspect, the power supply cover can be prevented from being opened carelessly, and the battery can be prevented from being stolen.

  A seventh invention is a lawn mower according to any of the first to sixth inventions, wherein a plurality of batteries can be attached and the battery operates with the power of the total voltage of the plurality of batteries. According to the seventh aspect of the invention, a large amount of electric power can be obtained from a plurality of batteries electrically connected in series, whereby the movement performance and the pruning performance of the autonomously operated lawn mower can be enhanced. In addition, a plurality of small power batteries can be used effectively. According to the seventh aspect of the invention, for example, two 18V specification batteries can be attached to provide a 36V specification lawn mower.

1 is an overall perspective view of a lawn mower according to a first embodiment of the present invention. It is a top view of the lawn mower of a 1st embodiment. FIG. 3 is a sectional view taken along the line (III)-(III) in FIG. 2, and is a longitudinal sectional view of the lawn mower according to the first embodiment. It is the rear view which looked at the lawn mower of 1st Embodiment from the arrow (IV) direction in FIG. It is the bottom view which looked at the battery attachment part from the arrow (V) direction in FIG. This figure has shown the state which removed the battery. In this figure, the white arrow has shown the attachment direction of the battery with respect to a battery attachment part. It is a perspective view of a battery unit. It is the top view which looked at the battery simple substance from the arrow (VII) direction in FIG. It is the rear view which looked at the battery simple substance from the arrow (VIII) direction in FIG. It is a top view of the lawn mower of 2nd Embodiment. FIG. 10 is a sectional view taken along the line (X)-(X) in FIG. 9, and is a longitudinal sectional view of the lawn mower according to the second embodiment. It is the rear view which looked at the lawn mower of 2nd Embodiment from the arrow (XI) direction in FIG. It is the bottom view which looked at the battery attachment part from the arrow (XII) direction in FIG. It is a top view of the lawn mower of 3rd Embodiment. FIG. 14 is a sectional view taken along the line (XIII)-(XIII) in FIG. 13 and is a longitudinal sectional view of the lawn mower according to the third embodiment. It is the rear view which looked at the lawn mower of 3rd Embodiment from the arrow (XVIII) direction in FIG. It is a top view of the lawn mower of 4th Embodiment. FIG. 17 is a sectional view taken along the line (XVII)-(XVII) in FIG. 16, and is a longitudinal sectional view of the lawn mower according to the fourth embodiment. It is the rear view which looked at the lawn mower of 4th Embodiment from the arrow (XVIII) direction in FIG. It is a whole perspective view of the lawn mower of 5th Embodiment. It is a top view of the lawn mower of 5th Embodiment. FIG. 21 is a sectional view taken along the line (XXI)-(XXI) in FIG. 20 and is a longitudinal sectional view of the lawn mower according to the fifth embodiment. It is the rear view which looked at the lawn mower of 5th Embodiment from the arrow (XXII) direction in FIG. FIG. 21 is a cross-sectional view taken along the line (XXIII)-(XXIII) in FIG. 20, and is a vertical cross-sectional view of the battery mounting portion. It is a top view of the lawnmower of 6th Embodiment. It is a (XXV)-(XXV) line section arrow view of Drawing 24, Comprising: It is a longitudinal section of the lawn mower of a 6th embodiment. It is the rear view which looked at the lawn mower of 6th Embodiment from the arrow (XXVI) direction in FIG. FIG. 25 is a cross-sectional view taken along the line (XXVII)-(XXVII) in FIG. 24, and is a vertical cross-sectional view of the battery mounting portion. It is a whole perspective view of the lawn mower of 7th Embodiment. It is a top view of the lawn mower of 7th Embodiment. It is a (XXX)-(XXX) sectional view arrow line view in FIG. 29, Comprising: It is a longitudinal cross-sectional view of the lawn mower of 7th Embodiment. It is the rear view which looked at the lawn mower of 7th Embodiment from the arrow (XXXI) direction in FIG. It is a top view of the lawn mower of 8th Embodiment. FIG. 33 is a sectional view taken along the line (XXXIII)-(XXXIII) in FIG. 32 and is a longitudinal sectional view of the lawn mower according to the eighth embodiment. It is the rear view which looked at the lawn mower of 8th Embodiment from the arrow (XXXIV) direction in FIG. It is a whole perspective view of a rechargeable brush cutter (electric tool).

  Next, 1st-8th embodiment of this invention is described based on FIGS. 1-35. The lawn mowers 1 to 8 of the embodiments described below each have a function of trimming the lawn while moving independently. Moreover, the lawnmowers 1-8 of each embodiment can be attached with the battery 30 which can be used repeatedly as a power supply by charging with the charger prepared separately. The battery 30 is also referred to as a battery pack, and a battery that can be attached as a power source for a mainly hand-held power tool such as a rechargeable screwing machine or a cutting machine can be used as it is. In each embodiment, an 18V specification lithium ion battery is illustrated as the battery 30.

  1-4 has shown the lawn mower 1 of 1st Embodiment. The lawn mower 1 includes a main body case 10 and a mechanism unit 20. The main body case 10 is made of resin and has a function as a cover having a shape and size that covers almost the entire mechanism portion 20. On the upper surface of the main body case 10, a large push button 11 on which “STOP” is displayed is arranged. This push button 11 is a push button for emergency stop, and when the user pushes the push button 11, the moving operation and the mowing operation of the lawn mower 1 are urgently stopped. A pair of guard portions 12 are provided on the left and right sides of the push button 11 to prevent the main body case 10 from being damaged mainly on the upper surface. The pair of left and right guard portions 12 are mainly grounded directly on the upper surface of the main body case 10 when, for example, the maintenance work is performed by turning the lawn mower 1 upside down or when a battery is attached from the lower surface side of the main body in the embodiment described later. It has a function of avoiding the damage and preventing the damage.

  The mechanism unit 20 includes a mechanism base 21. A pair of left and right auxiliary wheels 22 are rotatably supported on the front side of the mechanism base 21. The left and right auxiliary wheels 22 are supported so as to swing freely to the left and right. A pair of left and right drive wheels 23 are rotatably supported on the rear side of the mechanism base 21. A large-diameter wheel is used as the drive wheel 23 with respect to the small-diameter auxiliary wheel 22.

  As shown in FIG. 3, one trimming motor 24 is disposed at the approximate center of the mechanism base 21. The trimming motor 24 is accommodated in the motor holder 25. The motor holder 25 has a two-layer structure of a cylindrical outer cylinder part 25a and an inner cylinder part 25b. The inner cylinder part 25b located along the inner peripheral surface of the outer cylinder part 25a is screwed to the outer cylinder part 25a. The outer cylinder part 25 a is fixed to the mechanism base 21. A motor base 25c is fixed to the lower portion of the inner cylinder portion 25b. A trimming motor 24 is attached to the motor base 25c. A trimming blade 26 is attached to the output shaft 24 a of the trimming motor 24. As shown in FIG. 3, the output shaft 24 a of the trimming motor 24 is inclined with respect to the grass trimming surface G. For this reason, the trimming blade 26 is inclined in the direction in which the front side is lowered. Moreover, the trimming motor 24 can be displaced up and down by rotating the inner cylinder part 25b with respect to the outer cylinder part 25a via the motor base 25c. By adjusting the vertical position of the trimming motor 24, the trimming depth with respect to the trimming surface G of the trimming blade 26 can be adjusted.

  A pair of left and right drive motors 27 are disposed at the rear of the mechanism base 21. The pair of left and right drive wheels 23 rotate using the pair of left and right drive motors 27 as drive sources. The drive motor 27 is controlled to be able to rotate forward and reverse and to change the rotation speed. The rotation direction and rotation speed of the left and right drive motors 27 are controlled independently of each other, whereby the rotation direction and rotation speed of the left and right drive wheels 23 are controlled independently of each other. The moving direction (forward, backward), moving speed and turning motion are arbitrarily controlled.

  A control device C for controlling the operation of the lawn mower 1 is disposed at the front portion of the mechanism base 21. By the control device C, main operations such as forward, backward and left / right turning operations of the lawn mower 1 and activation and stop of the mowing motor 24 are controlled based on a control program inputted in advance. Information of various sensors (not shown) is input to the control device C. Various sensors include sensors necessary for autonomous operation such as a contact sensor, a direction sensor, and a distance sensor provided in this type of autonomous operation type unmanned lawn mower.

  A power supply unit 40 is disposed between the left and right drive wheels 23 at the rear of the mechanism base 21. The power supply unit 40 includes a power supply case 41 that shields the top, bottom, left, right, and front and back. A battery attachment portion 31 is accommodated in the power supply case 41. One battery 30 can be attached to the battery attachment portion 31. By being housed in the power supply case 41, it is possible to prevent the surrounding dust, trimmed turf, rainwater, and the like from falling on the battery 30. The rear surface side of the power supply case 41 can be opened by the power supply lid 42.

  The power supply lid 42 is provided so that it can be opened and closed up and down via a hinge portion 43. A window 10 a for opening and closing the power supply lid 42 is provided at the rear of the main body case 10. The battery 30 can be attached to and detached from the battery attachment portion 31 by rotating the power supply lid 42 downward to open the rear surface side of the power supply case 41. By closing the power supply lid 42, the inside of the power supply case 41 is sealed and rain water or the like is prevented from falling on the battery 30. Thus, the power supply case 41 and the power supply lid 42 are disposed on the rear side of the main body case 10, and the battery 30 is moved from the rear to the front of the main body case 10 by opening the power supply cover 42. The battery 30 can be mounted in the power supply case 41.

  A battery base 44 is horizontally disposed in the power supply case 41 via a support leg 45. A battery attachment portion 31 is attached to the lower surface of the battery base 44. One battery 30 is attached to the battery attachment portion 31 as a power source. The state which looked at the battery 30 and the battery attachment part 31 from the lower surface side (arrow V direction) is shown by FIG. 6 to 8 show the battery 30 alone.

  A pair of left and right rail receiving portions 30 a are provided on the upper surface of the battery 30. Positive and negative terminal receiving portions 30b and 30c are provided inside the left and right rail receiving portions 30a. Between the positive / negative terminal receiving parts 30b and 30c, the connector part 30d for transmitting / receiving various control signals between chargers is arrange | positioned. A lock claw 30e is provided behind the connector portion 30d. The lock claw 30e is urged in a direction protruding upward by a spring mounted in the battery case. As shown in FIG. 8, an unlock button 30 f is provided on the rear surface of the battery 30. The unlock button 30f is provided integrally with the lock claw 30e. For this reason, when the unlock button 30f is pushed down with a fingertip, the lock claw 30e can be moved in the direction of pulling downward against the spring biasing force (unlock side).

  The battery attachment portion 31 includes a pair of left and right rail portions 31a. Positive and negative connection terminals 31b and 31c are disposed inside both rail portions 31a. An engagement recess 31d into which the lock claw 30e on the battery 30 side is fitted is provided on the upper part of the battery attachment portion 31. One battery 30 is attached in a suspended state to the battery attachment portion 31 attached to the lower surface of the battery base 44. In the attached state of the battery 30 shown in FIGS. 2, 3, and 4, the user pushes down the unlock button 30 f with a fingertip, and thereby the lock claw 30 e is retracted downward from the engagement recess 31 d, The battery 30 can be removed from the battery attachment portion 31 by sliding backward.

  The removed battery 30 can be attached to the battery attachment portion 31 by moving the upper surface thereof horizontally in an upward direction and causing the rail portions 31a to enter the left and right rail receiving portions 30a. When the battery 30 is slid horizontally and the lock claw 30e is elastically fitted into the engagement recess 31d, the battery 30 is locked in a state of being attached to the battery attachment portion 31. When the battery 30 is attached to the battery attachment portion 31, the positive and negative connection terminals 31b and 31c enter the positive and negative terminal receiving portions 30b and 30c, and the battery 30 is electrically connected to the battery attachment portion 31. It becomes the state. Note that the connector portion 30 d of the battery 30 is not connected to the battery attachment portion 31. This connector part 30d is connected to a connector receiving part on the charger side in order to output various control signals to the charger side when the battery 30 is attached to a separately prepared charger for charging.

  The battery 30 is also referred to as a battery pack in which a plurality of cells are housed in a rectangular parallelepiped battery case. In this embodiment, a lithium ion battery with an output voltage of 18 V is used. The battery 30 can be used repeatedly by removing it from the lawn mower 1 and charging it with a separately prepared charger. The battery 30 is a general-purpose high slide mounting type battery that is also used as a battery for other rechargeable electric tools such as an electric screw tightener and an electric drill, and is shared with other rechargeable electric tools. (Reuse).

  FIG. 35 shows a brush cutter as an example of a rechargeable electric tool. The power tool 100 is used by a user in a standing posture, and is provided on a tool main body 101, an operating rod 102 that extends obliquely rearward and upward from a rear portion of the tool main body 101, and an upper portion of the operating rod 102. A loop-shaped handle portion 103 is provided. An activation switch lever 103a is provided on the inner peripheral side of the handle portion 103 and is gripped by the user and pulled by the fingertip of the hand. A loop-shaped sub handle 105 that is gripped by the other hand is provided in the middle of the operation rod 102.

  On the lower surface of the handle portion 103, a battery attachment portion 104 similar to the battery attachment portion 32 shown in FIG. 12 is provided. Two batteries 30 are attached to the battery attachment portion 104 in a state where they are arranged side by side. An electric motor built in the tool main body 101 is driven by using two batteries 30 as power sources. When the electric motor is driven, the cord holder 101b on which the cutter cord 101a is mounted rotates. By rotating the cord holder 101b, the cutter cord 101a is turned at a high speed, so that the vegetation is cut. The rear side of the cutter cord 101a is guarded by a semicircular cover 101c. It should be noted that a metal disk cutter can be attached to the cord holder 101b instead of the string-like cutter cord 101a.

  One or two batteries 30 removed from the battery mounting portion 104 can be used as the power source of the lawn mower 1 as they are. In the first embodiment, a lawn mower 1 that uses one battery 30 as a power source is illustrated. The electric power of the battery 30 attached to the battery attachment portion 31 is supplied to the trimming motor 24 and the left and right drive motors 27. In the state where the battery 30 is attached to the battery attachment portion 31, the lawn, rainwater and other dusts cut into the power supply case 41 can be prevented from entering by turning the power cover 42 upward and closing it. Thus, the battery 30 and the battery mounting portion 31 can be protected from dust and the like.

  According to the lawn mower 1 of the first embodiment configured as described above, it is possible to use, as a power source, the battery of a power tool such as a screwing machine or a cutting machine widely used in gardening work such as garden care, for example. it can. For this reason, when it becomes necessary to charge, for example, when the remaining capacity of the battery 30 is reduced, if another battery of the electric tool is prepared, it can be used as it is, and in this respect, the lawn mower 1 Usability can be further improved. Moreover, since the battery of an electric tool can be utilized, it can be used repeatedly as a power supply of the lawn mower 1 by charging using the charger attached to the said electric tool.

  For example, after performing the trimming work with the illustrated autonomous lawn mower 1, when performing the finishing mowing work with the manually-movable lawn mower or the above-described brush cutter, the lawn such as the hairline left after trimming, The battery 30 removed from the autonomously operated lawn mower 1 can be directly attached to a manually-moving lawn mower or brush cutter and used as a power source. In this way, since the battery of the electric tool can be used as it is as the power source of the illustrated lawn mower 1, not only the lawn mower 1 but also the usability and handleability of the electric tool can be improved.

  Further, according to the lawn mower 1 of the first embodiment, the power supply unit 40 is disposed between the left and right drive wheels 23, and the battery 30 occupying a relatively large weight is attached to the battery attachment unit 31 provided in the power supply unit 40. It is done. Since the heavy battery 30 is disposed between the drive wheels 23, the weight balance of the lawn mower 1 is appropriately taken, so that it is possible to ensure stable traveling performance with respect to straightness of the lawn mower 1 and the like. . In addition, the battery attachment portion 31 is attached to the lower surface of the battery base 44, and the battery 30 is attached to a lower portion in the height direction of the lawn mower 1. Since the relatively heavy battery 30 is mounted at a low position, the center of gravity of the lawn mower 1 can be set to a lower position (lowering the center of gravity). Can be increased.

  Further, according to a conventional lawn mower with a built-in battery, it is necessary to interrupt the lawn mowing operation while charging at the charging station. In this regard, according to the lawn mower 1 of the first embodiment, when the battery 30 is charged, another lawn mower can be continued by attaching another charged battery 30 to the battery attachment part 31. The operating rate of 1 can be increased to speed up lawn mowing work.

  Various modifications can be made to the first embodiment described above. For example, FIGS. 9 to 11 show a high-power type lawn mower 2 that uses two batteries 30 used as power sources in the first embodiment as power sources. The lawn mower 2 of the second embodiment is configured in the same manner as the lawn mower 1 of the first embodiment except that two batteries 30 can be attached. The members and configurations that do not need to be changed are denoted by the same reference numerals and the description thereof is omitted.

  The lawn mower 2 of the second embodiment includes a power supply unit 40 at the rear part of the mechanism base 21 as in the first embodiment. A battery attachment portion 32 for attaching two batteries 30 is disposed in the power supply case 41 of the power supply portion 40. The battery attachment portion 32 is attached to the lower surface of the battery base 44 as in the first embodiment. FIG. 12 shows a state where the battery mounting portion 32 is viewed from the lower surface side. The battery attachment portion 32 of the second embodiment has a left attachment portion 32L and a right attachment portion 32R. The left attachment portion 32L and the right attachment portion 32R are arranged side by side in the left-right direction. Each of the left attachment portion 32L and the right attachment portion 32R has the same configuration as the battery attachment portion 31 of the first embodiment. The left attachment portion 32L and the right attachment portion 32R each have a pair of left and right rail portions 31a, positive and negative connection terminals 31b and 31c, and an engagement recess 31d.

  The two batteries 30 can be attached to the left and right attachment parts 32L and 32R by horizontally sliding the battery 30 with respect to the left and right attachment parts 32L and 32R, respectively, with the upper surface directed upward. In FIG. 12, the mounting direction of the battery 30 with respect to the left and right mounting portions 32L and 32R is indicated by white arrows. When the batteries 30 are attached to the left and right attachment portions 32L and 32R, the batteries 30 are electrically connected in series. Since two 18V-specific batteries 30 are connected in series to serve as a 36V-specific power supply, more power can be supplied to the trimming motor 24 and the left and right drive motors 27, thereby the lawn mower. It is possible to increase the output of the pruning ability and the movement performance.

  The lawnmower 3 of 3rd Embodiment is shown by FIGS. 13-15. The lawn mower 3 according to the third embodiment is different from the first and second embodiments in the attachment and removal directions of the battery 30. In the first and second embodiments, the attachment and removal directions of the battery 30 are set in the horizontal direction (direction parallel to the trimming surface G). On the other hand, in 3rd Embodiment, the attachment direction of the battery 30 is set to diagonally forward downward, and the removal direction is set to diagonally upward backward. The third embodiment is common to the first embodiment in that one battery 30 is used as a power source.

  In the third embodiment, the battery base 50 is supported in the power supply case 41 of the power supply unit 40. The battery base 50 is supported by the four support legs 45 so as to be inclined in a direction of lowering to the front side. A battery attachment portion 31 is attached to the lower surface of the battery base 50. One battery 30 is attached to the battery attachment portion 31. For this reason, as shown by the white arrow in FIG. 14, the mounting direction of the battery 30 is set diagonally forward and downward, and the removal direction is diagonally upward and backward.

  A window portion 10 b that is opened on the rear surface of the main body case 10 is provided on the rear upper side of the battery 30. The opening range of this window part 10b is expanded above the window part 10a of 1st Embodiment. This window portion 10 b is opened and closed by a power supply lid 51. In the third embodiment, the upper part of the power supply lid 51 and the upper part of the window part 10 b are coupled via the hinge part 52. For this reason, in 3rd Embodiment, if the power supply cover 51 is rotated upwards, the window part 10b will be open | released, and if the power supply cover 51 is rotated below, the window part 10b will be closed.

  As described above, also in the third embodiment, the power supply case 41 and the power supply lid 51 are disposed on the rear side of the main body case 10, and the battery 30 is moved obliquely forward from the rear of the main body case 10 by opening the power supply cover 51. The battery 30 can be mounted in the power supply case 41 by moving the battery.

  In addition, according to the third embodiment, since the attachment and removal directions of the battery 30 are set to be obliquely lower forward and obliquely upward rearward, the user attaches the battery 30 to the battery attachment portion 31. It is not necessary to take a cramped posture to look into the power supply case 41 when removing the battery case, and it can be attached and removed in a more comfortable posture. In this respect, the operability when replacing the battery is improved. .

  The lawnmower 4 of 4th Embodiment is shown by FIGS. 16-18. The lawn mower 4 of the fourth embodiment is different from the third embodiment in that two 18V specification battery 30 are attached to serve as a power source. The two batteries 30 can be attached to the battery attachment portion 32 by sliding them forward and obliquely downward, and can be removed by sliding backward and obliquely upward.

  In the case of the fourth embodiment, the battery attachment portion 32 is attached to the lower surface of the battery base 50 of the power supply portion 40. Similar to the second embodiment, the battery attachment portion 32 includes a left attachment portion 32L and a right attachment portion 32R. The left attachment portion 32L and the right attachment portion 32R are arranged side by side in the left-right direction.

  Similar to the third embodiment, a power supply lid 51 for opening and closing the power supply unit 40 is provided on the rear surface of the main body case 10. The two batteries 30 can be attached to and removed from the battery attachment portion 32 by opening the power supply lid 51 by turning it upward.

  According to the fourth embodiment, the two batteries 30 can be attached and removed in an easy posture, and the trimming motor 24 and the left and right drive motors 27 can be operated with a power supply of 36V specifications. High output can be achieved with respect to the mowing ability and movement performance of the lawn mower 4.

  The lawnmower 5 of 5th Embodiment is shown by FIGS. In the lawn mowers 1 to 4 according to the first to fourth embodiments described above, the battery 30 as a power source is attached to the inside of the main body case 10. On the other hand, in the fifth embodiment, the power supply unit 58 to which the battery 30 is attached is provided outside the main body case 10. As shown in FIGS. 19 to 23, the lawn mower 5 of the fifth embodiment is provided with a power source 58 on the upper surface of the rear part of the main body case 10.

  The power supply unit 58 includes a power supply cover 55 that can be opened and closed by rotating up and down. The power supply cover 55 has a dome shape that swells upward, and is supported so as to be rotatable up and down via a hinge portion 56 at the front thereof. When the power supply cover 55 is closed, a battery accommodating space 57 is formed between the upper surface of the main body case 10. The power supply cover 55 can be locked in the closed state by the key portion 59. Since the power supply cover 55 can be locked in the closed state by the key portion 59, the battery 30 can be prevented from being stolen. Further, a waterproof rubber seal is attached to the peripheral portion of the power supply cover 55, and measures are taken for waterproofing the battery 30 and the battery mounting portion 31.

  In the battery housing space 57, a battery attachment portion 31 for attaching one battery 30 to the upper surface of the main body case 10 is attached. The battery 30 can be attached to and detached from the battery attachment portion 31 by sliding in the horizontal direction. The battery 30 can be horizontally slid forward with respect to the battery attachment portion 31 to attach the battery 30 to the battery attachment portion 31, and the battery 30 can be removed from the battery attachment portion 31 by horizontally sliding backward. it can.

  The lawn mower 6 according to the sixth embodiment shown in FIGS. 24 to 27 can attach two 18V specification batteries 30 to the power supply unit 60 provided on the upper surface of the rear part of the main body case 10. In the case of the sixth embodiment, a battery housing space 62 is formed between the power supply cover 61 and the upper surface of the main body case 10. A battery attachment portion 62 having two attachment portions 32L and 32R is attached to the upper surface of the main body case 10. The battery 30 can be attached to the attachment portions 32L and 32R by sliding the battery 30 horizontally from the rear to the front with respect to both attachment portions 32L and 32R, and the battery 30 is directed rearward from the attachment portions 32L and 32R. The battery 30 can be removed from the attachment portions 32L and 32R by sliding horizontally. As described above, in the case of the sixth embodiment, the two batteries 30 are configured to be attached in a laterally horizontal state. For this reason, as shown in FIG. 26, the power supply cover 61 is larger than the power supply cover 55 of 5th Embodiment about the width dimension of the left-right direction. The power supply cover 61 is also locked in the closed state by the key portion 63 so that the battery 30 is prevented from being stolen.

  According to the lawn mowers 5 and 6 of the fifth and sixth embodiments, since the battery 30 is attached to the power supply units 58 and 60 provided outside the main body case 10, the user can use the third and fourth embodiments. The battery 30 can be attached and detached in a more comfortable posture, and the operability and handling of the lawn mowers 5 and 6 can be further enhanced in this respect. In addition, according to the sixth embodiment, the configuration is such that two 18V-specific batteries 30 are attached and used as a 36V-specific power supply, and therefore, in terms of pruning ability and moving performance more than the lawn mower 5 of the fifth embodiment. High output can be achieved.

  28 to 31 show the lawn mower 7 of the seventh embodiment, and FIGS. 32 to 34 show the lawn mower 8 of the eighth embodiment. The lawn mowers 7 and 8 of the seventh and eighth embodiments are different from the fifth and sixth embodiments in that the battery attachment portions 31 and 32 are also attached to the dome-shaped power supply covers 71 and 81 side. ing. The lawn mower 7 of the seventh embodiment is configured to attach one battery 30 as a power source, and the lawn mower 8 of the eighth embodiment differs from each other in that it is configured to attach two batteries 30 as a power source. ing.

  The lawn mower 7 according to the seventh embodiment includes a power supply cover 71 that is pivoted up and down on the rear upper surface of the main body case 10 to open and close. A battery housing space 72 is formed between the power supply cover 71 and the upper surface of the main body case 10. In the case of the seventh embodiment, the battery attachment portion 31 to which one battery 30 can be attached is attached to the lower surface (inner surface) of the power supply cover 71. This is different from the fifth embodiment in which the battery attachment portion 31 is attached to the upper surface of the main body case 10. The power supply cover 71 can be locked in the closed state by the key portion 73, thereby preventing the battery 30 from being stolen.

  The lawn mower 8 according to the eighth embodiment includes a power supply cover 81 that is pivoted up and down on the rear upper surface of the main body case 10 to open and close. A battery accommodating space 82 is provided between the power supply cover 81 and the upper surface of the main body case 10. A battery housing space 82 is formed between the power supply cover 81 and the upper surface of the main body case 10. In the case of the eighth embodiment, a battery attachment portion 32 to which two batteries 30 can be attached is attached to the lower surface (inner surface) of the power supply cover 81. This point is different from the sixth embodiment in which the battery attachment portion 32 is attached to the upper surface of the main body case 10. The power supply cover 81 can be locked in the closed state by the key portion 83, thereby preventing the battery 30 from being stolen.

  In the case of the seventh and eighth embodiments, the battery 30 can be attached to the battery attachment portion 31 (32) by moving along the dome-shaped inner peripheral surface of the power supply covers 71 and 81, and can be removed conversely. it can. The dome shape of the power supply covers 71 and 81 is formed in a curved shape that allows the battery 30 to be attached and detached.

  Also in the seventh and eighth embodiments, since the battery 30 is attached to the power supply units 70 and 80 provided on the upper part (outside) of the main body case 10, the user can open the power supply covers 71 and 81 and have a comfortable posture. Thus, the battery 30 can be attached and detached, and the operability and handling of the lawn mowers 7 and 8 can be further enhanced in this respect. In addition, according to the eighth embodiment, the configuration is such that two 18V specification batteries 30 are attached and used as a 36V specification power supply, and therefore, in terms of pruning ability and moving performance more than the lawn mower 7 of the seventh embodiment. High output can be achieved.

  The embodiment described above can be further modified. For example, the battery 30 is detached from the battery attachment portion 31 (32) and charged with a separately prepared charger. However, the battery 30 is attached to the battery attachment portion 31 (32) instead of or in addition to the separate rechargeable battery. It is good also as a structure charged in the state. In this case, a configuration in which the charging function is built in the lawn mower 1 or a configuration in which the battery 30 is charged by connecting a separately prepared charger to the lawn mower can be employed. Furthermore, it is possible to move the lawn mower 1 to the charging station and charge the battery 30 when necessary.

  The battery may be automatically replaced at the station. Specifically, the form which has the following process can be illustrated. First, a lawn mower is located at a predetermined position of the station. Next, the automatic arm grips the battery and removes it from the battery mounting portion. Thereafter, the automatic arm grips the fully charged battery. Finally, the automatic arm attaches a fully charged battery to the battery mount.

  Moreover, although the DC power supply type lawn mowers 1 to 8 using only the battery 30 as an example have been illustrated, in addition to the DC power source, for example, a commercial power source of AC 100V can be used as a power source.

  Furthermore, as for the number of batteries 30 that can be attached as a power source, in addition to the configuration of one or two batteries as illustrated, three or more batteries can be attached and the output can be further increased.

  Moreover, it is good also as a structure which replaces with the battery 30 of a slide attachment type and uses a stick-type battery inserted and attached to a concave battery attachment part as a power supply. Moreover, each embodiment illustrated about the case where not a lithium ion battery but a nickel metal hydride battery or a nickel-cadmium battery is used as a power supply is applicable.

  In the above-described embodiment, an example in which the battery is disposed inside the housing case or in the accommodating space is shown. However, the battery may be directly attached to a mounting portion provided in the body case without a cover. . In this case, a part of the battery case (housing) is attached so as to protrude from the main body case.

  Moreover, although the example which connected the some battery in series was shown, you may connect in parallel. In this case, the working time can be lengthened.

1 ... lawn mower (first embodiment)
2 ... Lawn mower (second embodiment)
3 ... Lawn mower (third embodiment)
4 ... Lawn mower (fourth embodiment)
5 ... Lawn mower (fifth embodiment)
6 ... lawn mower (sixth embodiment)
7. Lawn mower (seventh embodiment)
8 ... Lawn mower (8th embodiment)
G ... turf surface (mowing surface)
C ... Control device 10 ... Main body case 10a ... Window portion (first and second embodiments), 10b ... Window portion (third and fourth embodiments)
11 ... Push button (for emergency stop)
DESCRIPTION OF SYMBOLS 12 ... Guard part 20 ... Mechanism part 21 ... Mechanism base 22 ... Auxiliary wheel 23 ... Drive wheel 24 ... Trimming motor, 24a ... Output shaft 25 ... Motor holder 25a ... Outer cylinder part, 25b ... Inner cylinder part, 25c ... Motor base 26 ... Mowing blade 27 ... Drive motor 30 ... Battery (battery pack)
30a ... Rail receiving portion, 30b, 30c ... Positive / negative terminal receiving portion, 30d ... Connector portion 30e ... Lock claw, 30f ... Unlock button 30g ... Battery case, 30h ... Battery cell 31 ... Battery mounting portion (for mounting one)
31a ... Rail part, 31b, 31c ... Positive / negative connection terminal, 31d ... Engagement recessed part 32 ... Battery attachment part (for attachment of 2 pieces)
32L ... Left mounting portion, 32R ... Right mounting portion 40 ... Power supply portion 41 ... Power supply case 42 ... Power supply lid (first and second embodiments)
43 ... Hinge (first and second embodiments)
44 ... Battery base (first and second embodiments)
45 ... support leg 50 ... battery base (third and fourth embodiments)
51. Power supply cover (third and fourth embodiments)
52 ... Hinge (third and fourth embodiments)
55. Power supply cover (fifth embodiment)
56. Hinge (fifth embodiment)
57 ... Battery accommodation space 58 ... Power supply (fifth embodiment)
59 ... Key part (fifth embodiment)
60 ... power supply (sixth embodiment)
61 ... Power supply cover (sixth embodiment)
62 ... Battery housing space (sixth embodiment)
63 ... Key part (sixth embodiment)
71 ... Power supply cover (seventh embodiment)
72. Battery housing space (seventh embodiment)
73 ... Key part (seventh embodiment)
81. Power supply cover (8th embodiment)
82 ... Battery accommodating space (eighth embodiment)
83. Key part (eighth embodiment)
100: Rechargeable electric plane (electric tool)
DESCRIPTION OF SYMBOLS 101 ... Tool body part 101a ... Cutter cord, 101b ... Code holder 102 ... Operation rod 103 ... Handle part 104 ... Battery attachment part 105 ... Sub handle

Claims (7)

A lawn mower that can operate autonomously and can use a rechargeable battery used as a power source for an electric tool as a power source. The lawn mower according to claim 1, further comprising a main body case and a driving motor disposed in the main body case and driving at least one wheel using the battery as a power source. The lawn mower according to claim 2, further comprising a pair of left and right drive wheels, and a battery attachment portion for attaching the battery between the drive wheels. The lawn mower according to claim 2, wherein a power cover is provided on the main body case so as to be openable and closable, and a battery for mounting the battery in a battery accommodating space formed between the power cover and the main body case. Lawn mower with attachment. The lawn mower according to claim 4, wherein the power supply cover is provided with the battery attachment part. The lawn mower according to claim 4 or 5, further comprising a key for locking the closed state of the power supply cover. The lawn mower according to any one of claims 1 to 6, wherein a plurality of the batteries can be attached, and the lawn mower operates with electric power of a total voltage of the plurality of batteries.

Images