JP7365585B2 - work vehicle - Google Patents

work vehicle Download PDF

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Publication number
JP7365585B2
JP7365585B2 JP2021132621A JP2021132621A JP7365585B2 JP 7365585 B2 JP7365585 B2 JP 7365585B2 JP 2021132621 A JP2021132621 A JP 2021132621A JP 2021132621 A JP2021132621 A JP 2021132621A JP 7365585 B2 JP7365585 B2 JP 7365585B2
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rear frame
vehicle body
connecting portion
battery
frame
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JP2023027498A (en
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裕佑 馬場
龍太郎 増田
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Iseki and Co Ltd
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Iseki and Co Ltd
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Priority to JP2021132621A priority Critical patent/JP7365585B2/en
Priority to KR1020220078729A priority patent/KR20230026249A/en
Priority to EP22185134.8A priority patent/EP4136959A1/en
Priority to TW111129663A priority patent/TW202318965A/en
Priority to US17/820,158 priority patent/US20230055171A1/en
Priority to CN202210991946.3A priority patent/CN115703367A/en
Publication of JP2023027498A publication Critical patent/JP2023027498A/en
Priority to JP2023174226A priority patent/JP2023175951A/en
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Description

本発明は、公園等を走行して芝等の刈取りを行う作業車両に関するものである。 The present invention relates to a work vehicle that travels in parks and the like to cut grass and the like.

従来、作業車両は、ボンネット部にエンジンを搭載して、エンジンの出力回転を後輪や作業車両の下部に昇降自在に支持されたモアデッキ等の作業機に伝動して駆動する手段が知られている。(特許文献1) Conventionally, it has been known that work vehicles have an engine mounted on the bonnet and drive the engine by transmitting the output rotation of the engine to the rear wheels or a work implement such as a mower deck that is supported at the bottom of the work vehicle so as to be able to rise and fall freely. There is. (Patent Document 1)

また、作業車両は、作業車両の後部にバッテリを搭載して、バッテリの電力を電動機に供給して、電動機の出力回転を後輪や作業車両の前部に昇降自在に支持されたモアデッキ等の作業機に伝動して駆動する手段が知られている。(特許文献2) In addition, the work vehicle is equipped with a battery at the rear of the work vehicle, and the power from the battery is supplied to the electric motor, and the output rotation of the electric motor is transferred to the rear wheels or the front part of the work vehicle, such as a mower deck, etc. Means for transmitting and driving a working machine are known. (Patent Document 2)

特開2003-158907号公報Japanese Patent Application Publication No. 2003-158907 特開2020-156340号公報JP2020-156340A

しかし、特許文献1の手段では、エンジンの出力回転を後輪や作業機に伝動する伝動機器の構成が複雑で部品点数も多いことからエネルギ効率が低いという恐れがあった。 However, with the means disclosed in Patent Document 1, the configuration of the transmission device that transmits the output rotation of the engine to the rear wheels and the working machine is complicated and has a large number of parts, so there is a fear that the energy efficiency will be low.

また、特許文献2の手段では、走行時に走行車体に発生する振動によってバッテリが破損する恐れがあった。 Furthermore, with the means disclosed in Patent Document 2, there is a risk that the battery may be damaged due to vibrations generated in the traveling vehicle body during driving.

そこで、本発明は、高いエネルギ効率で後輪等を駆動し、走行時に走行車体に発生する振動によるバッテリの破損を抑制した作業車両を提供することにある。 SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a work vehicle that drives rear wheels etc. with high energy efficiency and suppresses damage to a battery due to vibrations generated in a traveling vehicle body during driving.

上記課題を解決した本発明は次のとおりである。
すなわち、請求項1記載の発明は、走行車体(1)の前部に左右一対の前輪(2)を設け、該走行車体(1)の後部に左右一対の後輪(3)を設け、前記走行車体(1)の下面に芝等の雑草を刈取る作業機(4)を設け前記走行車体(1)の上面における前側に所定の空間が形成されたボンネット部(5)を設け、該ボンネット部(5)の後側に操縦者が搭乗する操縦部(6)を設けた作業車両において
前記後輪(3)を駆動する第1電動機(30)と、前記作業機(4)を駆動する第2電動機(40)を設け、前記ボンネット部(5)に、前記第1電動機(30)と第2電動機(40)に供給する電力を蓄電するバッテリ(50)を設け、バッテリ(50)に外嵌されたブラケット(52)を、前後方向に延在する左前後フレーム(52L)と、前後方向に延在する右前後フレーム(52R)と、前記左前後フレーム(52L)と右前後フレーム(52R)の前部を連結する前左右フレーム(52A)と、前記左前後フレーム(52L)と右前後フレーム(52R)の後部を連結する後左右フレーム(52B)で形成し、前記走行車体(1)の左部に設けられた左支持部材(12L,13L)と左前後フレーム(52L)を左防振部材(53L)を介して連結し、前記走行車体(1)の右部に設けられた右支持部材(12R,13R)と右前後フレーム(52R)を右防振部材(53R)を介して連結したことを特徴とする作業車両である。
The present invention that solves the above problems is as follows.
That is, the invention according to claim 1 provides a pair of left and right front wheels (2) at the front of a traveling vehicle body (1), a pair of left and right rear wheels (3) at the rear of the traveling vehicle body (1), and A working machine (4) for cutting weeds such as grass is provided on the lower surface of the traveling vehicle body (1) , and a bonnet portion (5) in which a predetermined space is formed is provided on the front side of the upper surface of the traveling vehicle body (1). In a work vehicle provided with a control section (6) on which an operator rides on the rear side of the bonnet section (5),
A first electric motor (30) that drives the rear wheel (3) and a second electric motor (40) that drives the work implement (4) are provided, and the first electric motor (30) is installed in the bonnet portion (5). and a battery (50) that stores electric power to be supplied to the second electric motor (40), and a bracket (52) fitted onto the battery (50) is connected to a left front and rear frame (52L) extending in the front and rear direction. , a right front and rear frame (52R) extending in the front and rear direction, a front left and right frame (52A) connecting the front parts of the left front and rear frame (52L) and the right front and rear frame (52R), and the left front and rear frame (52L). and a rear left and right frame (52B) connecting the rear part of the right front and rear frame (52R), and a left support member (12L, 13L) provided on the left side of the traveling vehicle body (1) and a left front and rear frame (52L). are connected via the left vibration isolating member (53L), and the right support member (12R, 13R) provided on the right side of the traveling vehicle body (1) and the right front and rear frame (52R) are connected to the right vibration isolating member (53R). This work vehicle is characterized in that it is connected via a .

請求項2記載の発明は、前記左支持部材(12L,13L)を前後方向に所定の間隔を隔てて設け、前記右支持部材(12R,13R)を前後方向に所定の間隔を隔てて設け、 前記左防振部材(53L)を左前後フレーム(52L)に前後方向に所定の間隔を隔てて設け、前記右防振部材(53R)を右前後フレーム(52R)に前後方向に所定の間隔を隔てて設け、正面視において、前記左支持部材(12L,13L)の連結部と左前後フレーム(52L)の連結部を左上がり傾斜に形成し、前記右支持部材(12R,13R)の連結部と右前後フレーム(52R)の連結部を右上がり傾斜に形成した請求項1記載の作業車両である。 The invention as set forth in claim 2 is characterized in that the left support members (12L, 13L) are provided at a predetermined interval in the front-rear direction, and the right support members (12R, 13R) are provided at a predetermined interval in the front-rear direction. The left vibration isolating member (53L) is provided on the left front and rear frame (52L) at a predetermined interval in the front and back direction, and the right vibration isolator (53R) is provided on the right front and rear frame (52R) at a predetermined interval in the front and rear direction. are provided at intervals of 2. The working vehicle according to claim 1, wherein the connecting portion between the front and rear right frames (52R) and the connecting portion between the right front and rear frames (52R) are formed to be inclined upwardly to the right.

請求項3記載の発明は、正面視において、前記左支持部材(12L,13L)の連結部と左前後フレーム(52L)の連結部を、前記左防振部材(53L)の中心と前輪(2)の左前輪(2L)の中心を結ぶ左仮想線(55L)と直交させて形成し、前記右支持部材(12R,13R)の連結部と右前後フレーム(52R)の連結部を、前記右防振部材(53R)の中心と前輪(2)の右前輪(2R)の中心をとおる右仮想線(55R)と直交させて形成した請求項2記載の作業車両である。 In the invention according to claim 3, when viewed from the front, the connecting portion of the left support member (12L, 13L) and the connecting portion of the left front and rear frame (52L) are connected to the center of the left vibration isolating member (53L) and the front wheel (2). ) is formed perpendicularly to the left imaginary line (55L) connecting the centers of the left front wheels (2L) of the The working vehicle according to claim 2, wherein the right imaginary line (55R) is formed perpendicularly to the center of the vibration isolating member (53R) and the center of the right front wheel (2R) of the front wheel (2).

請求項4記載の発明は、側面視において、前記走行車体(1)を前後方向に延在する走行車体本体(10)と、前記操縦部(6)のステアリングシャフト(63)を支持する上下方向に延在するステアリングポスト(11)で形成し、前記ステアリングポスト(11)の前面の下部に左右方向に所定の間隔を隔てて緩衝部材(15)を設け、前記バッテリ(50)の後面に、前記緩衝部材(15)の先端部を押当てた請求項1~3のいずれか1項に記載の作業車両である。 The invention according to claim 4 provides a traveling vehicle body main body (10) extending in the longitudinal direction of the traveling vehicle body (1), and a vertical direction supporting a steering shaft (63) of the control section (6), when viewed from a side. The steering post (11) is formed with a steering post (11) extending from the front surface thereof, and buffer members (15) are provided at a predetermined interval in the left-right direction at the lower part of the front surface of the steering post (11), and on the rear surface of the battery (50), The work vehicle according to any one of claims 1 to 3, wherein the front end of the buffer member (15) is pressed.

請求項1記載の発明によれば、後輪(3)を駆動する第1電動機(30)と、作業機(4)を駆動する第2電動機(40)を設け、ボンネット部(5)に、第1電動機(30)と第2電動機(40)に供給する電力を蓄電するバッテリ(50)を設け、バッテリ(50)に外嵌されたブラケット(52)を、前後方向に延在する左前後フレーム(52L)と、前後方向に延在する右前後フレーム(52R)と、左前後フレーム(52L)と右前後フレーム(52R)の前部を連結する前左右フレーム(52A)と、左前後フレーム(52L)と右前後フレーム(52R)の後部を連結する後左右フレーム(52B)で形成し、走行車体(1)の左部に設けられた左支持部材(12L,13L)と左前後フレーム(52L)を左防振部材(53L)を介して連結し、走行車体(1)の右部に設けられた右支持部材(12R,13R)と右前後フレーム(52R)を右防振部材(53R)を介して連結したので、後輪(3)や作業機(4)を駆動するエネルギ効率が高く、走行時に走行車体(1)に発生する振動でバッテリ(50)が破損するのを抑制することができる。また、ボンネット部(5)に形成された空間を有効活用してバッテリ(50)に雨水がかかるのを防止することができる。 According to the invention described in claim 1, the first electric motor (30) that drives the rear wheel (3) and the second electric motor (40) that drives the work implement (4) are provided, and the bonnet portion (5) is provided with: A battery (50) that stores power to be supplied to the first electric motor (30) and the second electric motor (40) is provided, and a bracket (52) fitted externally to the battery (50) is connected to the left front and rear extending in the front and rear direction. A frame (52L), a right front and rear frame (52R) extending in the front and rear direction, a front left and right frame (52A) connecting the front parts of the left front and rear frame (52L) and the right front and rear frame (52R), and a left front and rear frame (52L) and the rear left and right frames (52B) connecting the rear parts of the right front and rear frames (52R), and the left support members (12L, 13L) provided on the left side of the traveling vehicle body (1) and the left front and rear frames (52R). 52L) via the left vibration isolating member (53L), and the right support member (12R, 13R) provided on the right side of the traveling vehicle body (1) and the right front and rear frame (52R) are connected to the right vibration isolating member (53R). ) , the energy efficiency for driving the rear wheels (3) and work equipment (4) is high, and damage to the battery (50) due to vibrations generated in the vehicle body (1) during driving is suppressed. be able to. Furthermore, the space formed in the bonnet portion (5) can be effectively utilized to prevent rainwater from splashing onto the battery (50).

請求項2記載の発明によれば、請求項1記載の発明による効果に加えて、左支持部材(12L,13L)を前後方向に所定の間隔を隔てて設け、右支持部材(12R,13R)を前後方向に所定の間隔を隔てて設け、左防振部材(53L)を左前後フレーム(52L)に前後方向に所定の間隔を隔てて設け、右防振部材(53R)を右前後フレーム(52R)に前後方向に所定の間隔を隔てて設け、正面視において、左支持部材(12L,13L)の連結部と左前後フレーム(52L)の連結部を左上がり傾斜に形成し、右支持部材(12R,13R)の連結部と右前後フレーム(52R)の連結部を右上がり傾斜に形成したので、走行時に走行車体(1)に発生する大きな左右方向の振動でバッテリ(50)が破損するのをより抑制することができる。 According to the invention set forth in claim 2, in addition to the effect of the invention set forth in claim 1, the left support members (12L, 13L) are provided at a predetermined interval in the front-rear direction, and the right support members (12R, 13R) ) are provided at a predetermined interval in the front-rear direction, a left vibration-isolating member (53L) is provided at a predetermined interval in the front-rear direction on the left front and rear frame (52L), and a right vibration-isolating member (53R) is provided at a predetermined interval in the front-rear direction. It is provided on the front and rear frames (52R) at a predetermined interval in the front and rear direction, and when viewed from the front, the connecting portions of the left support members (12L, 13L) and the connecting portions of the left front and rear frames (52L) are formed to slope upward to the left. Since the connecting portions of the right support members (12R, 13R) and the right front and rear frame (52R) are formed with an upward slope to the right, the battery (50 ) can be further prevented from being damaged.

請求項3記載の発明によれば、請求項2記載の発明による効果に加えて、正面視において、左支持部材(12L,13L)の連結部と左前後フレーム(52L)の連結部を、左防振部材(53L)の中心と前輪(2)の左前輪(2L)の中心を結ぶ左仮想線(55L)と直交させて形成し、右支持部材(12R,13R)の連結部と右前後フレーム(52R)の連結部を、右防振部材(53R)の中心と前輪(2)の右前輪(2R)の中心をとおる右仮想線(55R)と直交させて形成したので、左前輪(2L)と右前輪(2R)を介して走行面の凹凸に起因する大きな振動を抑制して、バッテリ50の破損をさらに抑制することができる。 According to the invention set forth in claim 3, in addition to the effect of the invention set forth in claim 2, when viewed from the front, the connecting portion of the left support member (12L, 13L) and the connecting portion of the left front and rear frame (52L) are connected to the left side. It is formed perpendicularly to the left imaginary line (55L) connecting the center of the vibration isolating member (53L) and the center of the left front wheel (2L) of the front wheel (2), and connects the connecting part of the right support member (12R, 13R) with the right front and rear. Since the connection part of the frame (52R) was formed perpendicular to the right imaginary line (55R) passing through the center of the right vibration isolating member (53R) and the center of the right front wheel (2R) of the front wheel (2), the left front wheel ( 2L) and the right front wheel (2R), it is possible to suppress large vibrations caused by unevenness of the running surface, thereby further suppressing damage to the battery 50.

請求項4記載の発明によれば、請求項1~3のいずれか1項に記載の発明による効果に加えて、側面視において、走行車体(1)を前後方向に延在する走行車体本体(10)と、操縦部(6)のステアリングシャフト(63)を支持する上下方向に延在するステアリングポスト(11)で形成し、ステアリングポスト(11)の前面の下部に左右方向に所定の間隔を隔てて緩衝部材(15)を設け、バッテリ(50)の後面に、緩衝部材(15)の先端部を押当てたので、作業車両の発進時にバッテリ(50)が後方に移動するのを防止してバッテリ(50)が周辺部材に衝突して破損するのを抑制することができる。 According to the invention set forth in claim 4, in addition to the effects achieved by the invention set forth in any one of claims 1 to 3, when viewed from the side, the running vehicle body (1) extends in the longitudinal direction. 10) and a steering post (11) extending in the vertical direction to support the steering shaft (63) of the control section (6), with a predetermined interval left and right at the lower part of the front surface of the steering post (11). Since the buffer member (15) is provided separately and the tip of the buffer member (15) is pressed against the rear surface of the battery (50), the battery (50) is prevented from moving backward when the work vehicle is started. This can prevent the battery (50) from colliding with surrounding members and being damaged.

作業車両の左側面図である。FIG. 3 is a left side view of the work vehicle. ボンネットカバーを開放姿勢にした作業車両の左側面図である。FIG. 2 is a left side view of the work vehicle with the bonnet cover in an open position. 作業車両の一部を破断した要部の斜視図である。FIG. 2 is a partially cutaway perspective view of the main parts of the work vehicle. 作業車両の背面図である。FIG. 3 is a rear view of the work vehicle. 後輪と作業機の要部の平面図である。FIG. 3 is a plan view of the rear wheel and main parts of the working machine. 後輪と作業機の要部の左側面図である。FIG. 3 is a left side view of the rear wheel and main parts of the work machine. 後輪用の電動機と作業機用の電動機の左側面図である。FIG. 3 is a left side view of a rear wheel electric motor and a working machine electric motor. 走行車体の斜視図である。It is a perspective view of a traveling vehicle body. ステアリングポストの斜視図である。It is a perspective view of a steering post. バッテリとバッテリブラケットの斜視図である。It is a perspective view of a battery and a battery bracket. バッテリブラケットの斜視図である。It is a perspective view of a battery bracket. 前輪と、バッテリと、バッテリブラケットの正面図である。It is a front view of a front wheel, a battery, and a battery bracket. 作業車両の一部を破断した要部の平面図である。FIG. 2 is a partially cutaway plan view of the main parts of the work vehicle. 電装部品の斜視図である。FIG. 3 is a perspective view of electrical components. インバータ装置の筐体の斜視図である。FIG. 3 is a perspective view of the casing of the inverter device. バッテリ監視装置の筐体の斜視図である。FIG. 3 is a perspective view of the housing of the battery monitoring device. ブレーキペダルと、電動シリンダと、ドラムブレーキの左側面図である。It is a left side view of a brake pedal, an electric cylinder, and a drum brake. ブレーキペダルと、電動シリンダと、ドラムブレーキの平面図である。It is a top view of a brake pedal, an electric cylinder, and a drum brake.

図1に示すように、乗用芝刈り機等の作業車両は、走行車体1と、走行車体1の前部に左右一対の前輪2が設けられ、走行車体1の後部に左右一対の後輪3が設けられ、走行車体1の下側における前輪2と後輪3の間に芝等を刈取る作業機4が設けられている。また、走行車体1の上側の前部にボンネット部5が設けられ、ボンネット部5の後側には操縦者が搭乗する操縦部6が設けられ、操縦部6の後側には作業機4で刈取られた芝等を貯留する集草容器7が設けられている。 As shown in FIG. 1, a work vehicle such as a riding lawnmower includes a running vehicle body 1, a pair of left and right front wheels 2 provided at the front of the running vehicle body 1, and a pair of left and right rear wheels 3 provided at the rear of the running vehicle body 1. A working machine 4 for mowing grass or the like is provided between the front wheels 2 and the rear wheels 3 on the lower side of the traveling vehicle body 1. Further, a bonnet part 5 is provided at the upper front part of the traveling vehicle body 1, a control part 6 on which an operator rides is provided on the rear side of the bonnet part 5, and a control part 6 for operating the work machine 4 is provided at the rear side of the control part 6. A grass collection container 7 is provided to store cut grass and the like.

図2,3に示すように、ボンネット部5には、後輪3を駆動する電動機30等に供給する電力を蓄電するバッテリ50が設けられ、バッテリ50はボンネットカバー51で覆われている。なお、ボンネットカバー51は、走行車体1の前部に設けられた左右方向に延在する支軸(図示省略)に支持されている。これにより、ボンネット部5に形成される空間を有効に活用することができ、また、作業車両の前後方向の重量バランスの相違を抑制することができる。 As shown in FIGS. 2 and 3, the bonnet portion 5 is provided with a battery 50 that stores electric power to be supplied to the electric motor 30 that drives the rear wheels 3, etc., and the battery 50 is covered with a bonnet cover 51. The bonnet cover 51 is supported by a support shaft (not shown) provided at the front of the vehicle body 1 and extending in the left-right direction. Thereby, the space formed in the bonnet portion 5 can be effectively utilized, and also it is possible to suppress a difference in the weight balance in the front-rear direction of the work vehicle.

操縦部6の操縦席60の下側には、電装部品61が設けられている。これにより、操縦席60の下側に形成される空間を有効に活用することができる。 An electrical component 61 is provided below the pilot's seat 60 of the pilot section 6. Thereby, the space formed below the cockpit 60 can be effectively utilized.

図4~7に示すように、電装部品61の下側には後輪3を駆動する3相交流電圧波形で操作される同期電動機や誘導電動機等の電動機(請求項の「第1電動機」)30が設けられている。電動機30の左右方向に延在して形成された出力軸30Aは、出力軸30Aから伝動される出力回転を減速して出力トルクを大きくしたり回転方向を逆さにするギアボックス31の上部に連結されている。なお、電動機30は左右方向の中央よりも左側に偏移した位置に設けられている。また、 As shown in FIGS. 4 to 7, a motor such as a synchronous motor or an induction motor ("first motor" in the claims) that is operated by a three-phase AC voltage waveform that drives the rear wheels 3 is provided below the electrical component 61. 30 are provided. An output shaft 30A extending in the left-right direction of the electric motor 30 is connected to the upper part of a gearbox 31 that decelerates the output rotation transmitted from the output shaft 30A to increase the output torque or reverse the rotation direction. has been done. Note that the electric motor 30 is provided at a position shifted to the left of the center in the left-right direction. Also,

ギアボックス31で増減速された出力回転は、ギアボックス31の下部に設けられ差動歯車等で形成されたディファレンシャルギア32を介して左右方向に延在するドライブシャフト33に伝動される。ドライブシャフト33に伝動された出力回転は、ドライブシャフト33の両端部に支持された後輪3に伝動される。これにより、 The output rotation that has been increased or decreased by the gearbox 31 is transmitted to a drive shaft 33 that extends in the left-right direction through a differential gear 32 that is provided at the bottom of the gearbox 31 and is formed of a differential gear or the like. The output rotation transmitted to the drive shaft 33 is transmitted to the rear wheels 3 supported at both ends of the drive shaft 33. This results in

電動機30の下側には作業機4を駆動する3相交流電圧波形で操作される同期電動機や誘導電動機等の電動機(請求項の「第2電動機」)40が設けられている。電動機40の前後方向に延在して形成された出力軸40Aは、前後方向に延在して設けられた自在継手41の後部に連結されている。また、出力軸40Aは、ドライブシャフト33の上側に、ドライブシャフト33と直交して設けられている。これにより、電動機30の下側に形成された空間を有効に活用することができる。また、電動機40と作業機4の間の伝動経路を短くすることができるので電動機40の出力回転を作業機4に効率良く伝動することができる。なお、電動機40は左右方向の中央よりも左側に偏移した位置に設けられている。 An electric motor 40 ("second electric motor" in the claims), such as a synchronous motor or an induction motor, is provided below the electric motor 30 and is operated by a three-phase AC voltage waveform for driving the work implement 4. An output shaft 40A of the electric motor 40 extending in the front-rear direction is connected to a rear portion of a universal joint 41 extending in the front-rear direction. Further, the output shaft 40A is provided above the drive shaft 33 so as to be perpendicular to the drive shaft 33. Thereby, the space formed below the electric motor 30 can be effectively utilized. Further, since the transmission path between the electric motor 40 and the work implement 4 can be shortened, the output rotation of the electric motor 40 can be efficiently transmitted to the work implement 4. Note that the electric motor 40 is provided at a position shifted to the left of the center in the left-right direction.

自在継手41の前部は、自在継手41から伝動される出力回転を減速して出力トルクを大きくするギアボックス42に連結されている。ギアボックス42に伝動された出力回転は、ギアボックス42の上下方向に延在して形成された出力軸を介して作業機4の左排出通路45Lに設けられた左刈刃(図示省略)に伝動される。 The front portion of the universal joint 41 is connected to a gearbox 42 that reduces the output rotation transmitted from the universal joint 41 and increases the output torque. The output rotation transmitted to the gear box 42 is transmitted to the left cutting blade (not shown) provided in the left discharge passage 45L of the working machine 4 via an output shaft formed to extend in the vertical direction of the gear box 42. transmitted.

ギアボックス42の左部には、左右方向に延在する連結部材43が連結され、連結部材43の右部はギアボックス44に連結されている。ギアボックス44に伝動された出力回転は、ギアボックス44の上下方向に延在して形成された出力軸を介して作業機4の右排出通路45Rに設けられた右刈刃(図示省略)に伝動される。なお、ギアボックス42の出力軸とギアボックス44の出力軸の出力回転の回転速度は同一速度であり、回転方向は逆方向、すなわち、平面視において、ギアボックス42出力軸は時計方向に回転し、ギアボックス44の出力軸は反時計方向に回転する。 A connecting member 43 extending in the left-right direction is connected to the left side of the gear box 42, and a right side of the connecting member 43 is connected to a gear box 44. The output rotation transmitted to the gear box 44 is transmitted to the right cutting blade (not shown) provided in the right discharge passage 45R of the working machine 4 via an output shaft formed to extend in the vertical direction of the gear box 44. transmitted. Note that the output rotational speeds of the output shaft of the gearbox 42 and the output shaft of the gearbox 44 are the same speed, and the rotation directions are opposite, that is, the output shaft of the gearbox 42 rotates clockwise in a plan view. , the output shaft of the gearbox 44 rotates counterclockwise.

左排出通路45Lと右排出通路45Rの搬出口は、刈取られた芝等を集草容器7に搬送するシュータ46の搬入口に連結されている。シュータ46の搬出口は集草容器7の搬入口に連結されている。 The exits of the left discharge passage 45L and the right discharge passage 45R are connected to the entrance of a chute 46 that conveys cut grass and the like to the grass collecting container 7. The outlet of the chute 46 is connected to the inlet of the grass collecting container 7.

平面視において、シュータ46の前部は自在継手41の右側に設けられ、シュータ46の後部はギアボックス31の右側に設けられ、背面視において、シュータ46と集草容器7は、ギアボックス31と右側の後輪3の間に設けられている。これにより、自在継手41とギアボックス31の右側に形成される空間に大きなシュータ46を設けることができ、作業機4で刈取った芝等を効率良く集草容器7に搬送することができる。 In a plan view, the front part of the chute 46 is provided on the right side of the universal joint 41, and the rear part of the chute 46 is provided on the right side of the gearbox 31. In a rear view, the chute 46 and the grass container 7 are connected to the gearbox 31. It is provided between the rear wheels 3 on the right side. Thereby, a large chute 46 can be provided in the space formed on the right side of the universal joint 41 and the gearbox 31, and the grass etc. cut by the working machine 4 can be efficiently transported to the grass collecting container 7.

側面視において、シュータ46の上壁は後上がり傾斜に形成され、シュータ46の後部は電装部品61の下側を下方に向かって延在して設けられている。これにより、シュータ46の後部を大きくしてシュータ46の内部での芝等の詰まりを防止することができる。 In a side view, the upper wall of the shooter 46 is formed to slope upward at the rear, and the rear portion of the shooter 46 is provided to extend downward below the electrical component 61. This makes it possible to enlarge the rear portion of the chute 46 and prevent the inside of the chute 46 from becoming clogged with grass or the like.

図8,9に示すように、走行車体1は、前輪2と後輪3を支持する走行車体本体10と、ステアリングシャフト63を支持するステアリングポスト11から形成されている。 As shown in FIGS. 8 and 9, the traveling vehicle body 1 is formed of a traveling vehicle body main body 10 that supports the front wheels 2 and the rear wheels 3, and a steering post 11 that supports the steering shaft 63.

走行車体本体10には、前後方向に延在する左前後フレーム10Lと右前後フレーム10Rが形成され、ステアリングポスト11の下部には、前方に延出する左連結部11Lと右連結部11Rが形成されている。 The traveling vehicle main body 10 is formed with a left front and rear frame 10L and a right front and rear frame 10R that extend in the front and rear direction, and a left connecting portion 11L and a right connecting portion 11R that extend forward are formed at the lower part of the steering post 11. has been done.

左前後フレーム10Lに左連結部11Lがボルト等の締結手段によって固定され、右前後フレーム10Rに右連結部11Rボルト等の締結手段によって固定されて一体となり走行車体1を形成している。 A left connecting portion 11L is fixed to the left front and rear frame 10L by fastening means such as bolts, and a right connecting portion 11R is fixed to the right front and rear frame 10R by fastening means such as bolts, thereby forming the traveling vehicle body 1.

左前後フレーム10Lの前部には左支持部材12Lが設けられ、左支持部材12Lの連結部は左上がり傾斜に形成されている。また、右前後フレーム10Rの前部には右支持部材12Rが設けられ、右支持部材12Rの連結部は右上がり傾斜に形成されている。なお、左支持部材12Lと右支持部材12Rはチャンネル鋼材で形成されている。 A left support member 12L is provided at the front of the left front and rear frame 10L, and a connecting portion of the left support member 12L is formed to slope upward to the left. Further, a right support member 12R is provided at the front portion of the right front and rear frame 10R, and a connecting portion of the right support member 12R is formed to slope upward to the right. Note that the left support member 12L and the right support member 12R are made of channel steel.

左連結部11Lの前部には左支持部材13Lが設けられ、左支持部材13Lの連結部は左上がり傾斜に形成されている。また、右連結部11Rの前部には右支持部材13Rが設けられ、右支持部材1Rの連結部は右上がり傾斜に形成されている。なお、左支持部材13Lと右支持部材13Rはチャンネル鋼材で形成されている。 A left supporting member 13L is provided at the front of the left connecting portion 11L, and the connecting portion of the left supporting member 13L is formed to slope upward to the left. In addition, a right support member 13R is provided at the front of the right connection portion 11R, and the connection portion of the right support member 13R is formed to slope upward to the right. Note that the left support member 13L and the right support member 13R are made of channel steel.

ステアリングポスト11の下部には、左右方向に所定の間隔を隔てて前側に突出すると突出部14が形成され、突出部14の先端にはゴム部材等から形成された緩衝部材15が設けられている。 A protrusion 14 is formed at the bottom of the steering post 11 when it protrudes forward at a predetermined distance in the left-right direction, and a buffer member 15 made of a rubber member or the like is provided at the tip of the protrusion 14. .

図10に示すように、ボンネット部5内に設けられるバッテリ50の下部は、バッテリブラケット(請求項の「ブラケット」)52の内周部に内嵌されている。バッテリ50は、複数のエネルギ密度が高いリチウムイオンバッテリを直列と並列に接続して形成されている。これにより、ボンネット部5に形成された空間を有活用できる。また、リチウムイオンバッテリはエネルギ密度が高いので、一回のフル充電によって作業車両を長距離走行させることができる。 As shown in FIG. 10, the lower part of the battery 50 provided in the bonnet portion 5 is fitted into the inner peripheral part of a battery bracket ("bracket" in the claims) 52. The battery 50 is formed by connecting a plurality of high energy density lithium ion batteries in series and in parallel. Thereby, the space formed in the bonnet portion 5 can be effectively utilized. Furthermore, since lithium ion batteries have a high energy density, a work vehicle can travel long distances with one full charge.

図11に示すように、バッテリブラケット52は、前後方向に延在する左前後フレーム52L及び右前後フレーム52Rと、左前後フレーム52Lと右前後フレーム52Rの前部を連結する前左右フレーム52Aと、左前後フレーム52Lと右前後フレーム52Rの後部を連結する後左右フレーム52Bで形成されている。なお、左前後フレーム52L及と右前後フレーム52Rはアングル鋼材で形成され、前左右フレーム52Aと後左右フレーム52Bはチャンネル鋼材で形成されている。 As shown in FIG. 11, the battery bracket 52 includes a left front and rear frame 52L and a right front and rear frame 52R that extend in the front and back direction, and a front left and right frame 52A that connects the front parts of the left front and rear frame 52L and the right front and rear frame 52R. It is formed by rear left and right frames 52B that connect the rear parts of the left front and rear frames 52L and the right front and rear frames 52R. The left front and rear frames 52L and the right front and rear frames 52R are made of angle steel, and the front left and right frames 52A and the rear left and right frames 52B are made of channel steel.

左前後フレーム52Lの連結部は左上がり傾斜に形成され、右前後フレーム52Rの連結部は左上がり傾斜に形成されている。なお、背面視において、左支持部材13Lの連結部、左支持部材12Lの連結部、及び左前後フレーム52Lの連結部の左上がり傾斜は同一傾斜角度に形成され、右支持部材12Rの連結部、右支持部材12Rの連結部、及び右前後フレーム52Rの連結部の右上がり傾斜は同一傾斜角度に形成されている。 The connecting portion of the left front and rear frames 52L is formed to slope upward to the left, and the connecting portion of the right front and rear frame 52R is formed to slope upward to the left. In addition, in rear view, the leftward upward slopes of the connecting portion of the left support member 13L, the connecting portion of the left support member 12L, and the connecting portion of the left front and rear frame 52L are formed at the same inclination angle, and the connecting portion of the right support member 12R, The connecting portion of the right support member 12R and the connecting portion of the right front and rear frame 52R are inclined upwardly to the right at the same inclination angle.

左前後フレーム52Lの連結部の下面には、前後方向に所定の間隔を隔てて丸形の左防振部材53Lが設けられ、右前後フレーム52Rの連結部の下面には、前後方向に所定の間隔を隔てて丸形の右防振部材53Rが設けられている。 A round left anti-vibration member 53L is provided on the lower surface of the connecting portion of the left front and rear frame 52L at a predetermined interval in the front-rear direction, and a round left vibration isolating member 53L is provided on the lower surface of the connecting portion of the right front and rear frame 52R at a predetermined interval in the front-rear direction. Round right vibration isolating members 53R are provided at intervals.

左前後フレーム52Lは、左防振部材53Lを介して左前後フレーム10Lの左支持部材12Lと左連結部11Lの左支持部材13Lに連結され、右前後フレーム52Rは、右防振部材53Rを介して右前後フレーム10Rの右支持部材12Rと右連結部11Rの右支持部材13Rに連結される。これにより、作業車両の走行時に発生する走行車体本体10の振動がバッテリ50に伝わるのを抑制して、バッテリ50の破損等を防止することができる。 The left front and rear frame 52L is connected to the left support member 12L of the left front and rear frame 10L and the left support member 13L of the left connecting portion 11L via the left vibration isolator 53L, and the right front and rear frame 52R is connected to the left support member 13L of the left front and rear frame 11L via the right vibration isolator 53R. and is connected to the right support member 12R of the right front and rear frame 10R and the right support member 13R of the right connecting portion 11R. Thereby, it is possible to suppress the vibration of the traveling vehicle body 10 that occurs when the working vehicle is traveling from being transmitted to the battery 50, and to prevent the battery 50 from being damaged.

図12に示すように、左前後フレーム52Lの連結部は、左防振部材53Lの中心と左側の左前輪2Lの中心を結ぶ左仮想線55Lに対して直交して設けられている。また、右前後フレーム52Rの連結部は、右防振部材53Rの中心と右側の右前輪2Rの中心を結ぶ右仮想線55Rに対して直交して設けられている。これにより、前輪2と後輪3を介して走行面の凹凸に起因する大きな振動を抑制して、バッテリ50の破損等を防止することができる。なお、符号57は左右の前輪2を支持する前輪支持フレームを示し、符号56は前輪支持フレームと走行車体本体10との連結部であり、前輪支持フレームの揺動軸を示している。 As shown in FIG. 12, the connecting portion of the left front and rear frame 52L is provided perpendicularly to a left imaginary line 55L connecting the center of the left anti-vibration member 53L and the center of the left front wheel 2L. Further, the connecting portion of the right front and rear frame 52R is provided perpendicularly to the right imaginary line 55R connecting the center of the right vibration isolating member 53R and the center of the right front wheel 2R. Thereby, it is possible to suppress large vibrations due to unevenness of the running surface via the front wheels 2 and rear wheels 3, and prevent damage to the battery 50. Note that the reference numeral 57 indicates a front wheel support frame that supports the left and right front wheels 2, and the reference numeral 56 indicates a connecting portion between the front wheel support frame and the traveling vehicle main body 10, and indicates a swing axis of the front wheel support frame.

また、バッテリブラケット52の後左右フレーム52Bの後面には、ステアリングポスト11の緩衝部材15の先端部が押当てられている。これにより、作業車両の発進時にバッテリ50の後方への移動を抑制して、バッテリ50の破損等を防止することができる。 Further, the front end portions of the buffer members 15 of the steering post 11 are pressed against the rear surfaces of the rear left and right frames 52B of the battery bracket 52. Thereby, rearward movement of the battery 50 can be suppressed when the work vehicle starts, and damage to the battery 50 can be prevented.

図2,3に示すように、操縦部6の操縦席60の前側にはステアリングホイール62が設けられ、ステアリングホイール62は上下方向に延在するステアリングシャフト63の上部に支持されている。 As shown in FIGS. 2 and 3, a steering wheel 62 is provided in front of the pilot's seat 60 of the controller 6, and the steering wheel 62 is supported on the upper part of a steering shaft 63 that extends in the vertical direction.

操縦席60の左側の左フェンダ64Lには、シュータ46の内部に残った刈草を後側の集草容器7へ搬送等を操作するクリーナレバー65が設けられ、操縦席60の右側のフェンダ64Rには、作業機4の昇降等を操作する操作レバー66が設けられている。また、操縦時に操縦者が足を載せるフロア67の左前部には、ブレーキペダル68が設けられ、右前部には、前進用アクセルペダル75と後進用アクセルペダル76が並設されている。 A cleaner lever 65 is provided on the left fender 64L on the left side of the pilot's seat 60 to operate the conveyance of the grass clippings remaining inside the chute 46 to the grass collecting container 7 on the rear side. is provided with an operating lever 66 for operating the lifting and lowering of the working machine 4, etc. Further, a brake pedal 68 is provided on the left front part of the floor 67 on which the operator rests his/her feet during operation, and a forward accelerator pedal 75 and a reverse accelerator pedal 76 are arranged side by side on the right front part.

図13,14に示すように、操縦席60の下側に設けられた電装部品61は、バッテリ50から供給される直流電圧を交流電圧に変換して電動機30等を操作する3相交流電圧波形を生成するインバータ装置80と、バッテリ50の温度、充電状態、電圧保護、各セル短絡状態を監視するバッテリ監視装置81と、操縦席60の前側に設けられた走行速度等を表示するメータパネル(図示省略)に供給する電池を蓄電する鉛蓄電池等の補助バッテリ82と、バッテリ50から供給される直流電圧をクリーナレバー65等の操作位置を検出するセンサに供給する直流電圧に変更するコンバータ装置83から形成されている。 As shown in FIGS. 13 and 14, an electrical component 61 provided below the cockpit 60 converts the DC voltage supplied from the battery 50 into AC voltage to generate a three-phase AC voltage waveform to operate the electric motor 30, etc. an inverter device 80 that generates , a battery monitoring device 81 that monitors the temperature, charge state, voltage protection, and short-circuit state of each cell of the battery 50, and a meter panel (displays the traveling speed, etc.) provided in front of the cockpit 60. (not shown); and a converter device 83 that changes the DC voltage supplied from the battery 50 to the DC voltage supplied to a sensor that detects the operating position of the cleaner lever 65, etc. It is formed from.

インバータ装置80は、電動機30を操作するインバータ装置84と電動機40を操作するインバータ装置85から形成されている。また、インバータ装置84には、回生ブレーキの作動時、すなわち、前進用アクセルペダル75又は後進用アクセルペダル76が解放されて走行車体1の慣性力よって出力軸30Aが回転して電動機30が発電機として作動する場合には、電動機30からインバータ装置80に供給された電力をバッテリ50に充電する充電装置としての機能も兼ね備えている。 The inverter device 80 is formed from an inverter device 84 that operates the electric motor 30 and an inverter device 85 that operates the electric motor 40. In addition, the inverter device 84 is connected to the inverter device 84 when the regenerative brake is activated, that is, when the forward accelerator pedal 75 or the reverse accelerator pedal 76 is released, the output shaft 30A is rotated by the inertia of the traveling vehicle body 1, and the electric motor 30 is turned into a generator. When operating as a battery, it also functions as a charging device that charges the battery 50 with the power supplied from the electric motor 30 to the inverter device 80.

平面視において、操縦席60の下側の前部にインバータ装置80が設けられ、インバータ装置80の後側にバッテリ監視装置81が設けられている。また、インバータ装置80の左側に補助バッテリ82が設けられ、バッテリ監視装置81の左側で補助バッテリ82の後側にコンバータ装置83が設けられている。これにより、操縦席60の下側に形成された空間を有効に活用することができる。また、重量が重いバッテリ監視装置81を後側に設けることにより、走行車体本体10の前部と後部に加わる重量の相違を抑制して走行安定性能を高めることができる。 In plan view, an inverter device 80 is provided at the lower front part of the cockpit 60, and a battery monitoring device 81 is provided at the rear side of the inverter device 80. Further, an auxiliary battery 82 is provided on the left side of the inverter device 80, and a converter device 83 is provided on the left side of the battery monitoring device 81 and behind the auxiliary battery 82. Thereby, the space formed below the cockpit 60 can be effectively utilized. Further, by providing the heavy battery monitoring device 81 on the rear side, it is possible to suppress the difference in weight applied to the front and rear portions of the traveling vehicle main body 10 and improve running stability.

図15に示すように、インバータ装置80の筐体80Aの左壁と右壁の内面には、それぞれ前後方向に所定の間隔を隔てて丸形のグロメット86が設けられている。また、筐体80Aは、グロメット86を介して走行車体本体10の後部に設けられた左右方向に延在する左右フレーム16に連結されている。これにより、作業車両の走行時に発生する走行車体本体10の振動がインバータ装置80に伝わるのを抑制して、インバータ装置80の破損等を防止することができる。また、グロメット86に形成された中空部にインバータ装置80と電動機30を接続する電線等を挿通させて電線等の配策を容易に行うことができる。 As shown in FIG. 15, round grommets 86 are provided on the inner surfaces of the left and right walls of the casing 80A of the inverter device 80, respectively, at predetermined intervals in the front-rear direction. Further, the housing 80A is connected via a grommet 86 to left and right frames 16 provided at the rear of the vehicle main body 10 and extending in the left and right direction. Thereby, it is possible to suppress vibrations of the traveling vehicle body 10 that occur when the working vehicle is traveling from being transmitted to the inverter device 80, and to prevent damage to the inverter device 80. Further, the electric wires and the like connecting the inverter device 80 and the electric motor 30 can be inserted through the hollow portion formed in the grommet 86, so that the electric wires and the like can be easily routed.

図16に示すように、バッテリ監視装置81の筐体81Aの下壁には、前後方向と左右方向に所定の間隔を隔てて丸形のグロメット87が設けられている。また、筐体81Aは、グロメット87を介して左右フレーム16の後側に設けられた左右フレーム17に連結された支持フレーム18に連結されている。これにより、作業車両の走行時に発生する走行車体本体10の振動がバッテリ監視装置81に伝わるのを抑制して、バッテリ監視装置81の破損等を防止することができる。また、グロメット87に形成された中空部にバッテリ監視装置81とバッテリ50を接続する電線等を挿通させて電線等の配策を容易に行うことができる。 As shown in FIG. 16, round grommets 87 are provided on the lower wall of the housing 81A of the battery monitoring device 81 at predetermined intervals in the front-rear direction and the left-right direction. Furthermore, the housing 81A is connected via a grommet 87 to a support frame 18 that is connected to a left and right frame 17 provided on the rear side of the left and right frames 16. Thereby, it is possible to suppress vibrations of the traveling vehicle body 10 that occur when the working vehicle is traveling from being transmitted to the battery monitoring device 81, and to prevent damage to the battery monitoring device 81. Furthermore, the electric wires and the like connecting the battery monitoring device 81 and the battery 50 can be inserted through the hollow portion formed in the grommet 87, thereby making it possible to easily route the electric wires and the like.

図17,18に示すように、電動シリンダ70と後輪3に設けられたブレーキ71は、前後方向に延在するロッド72で連結されている。なお、電動シリンダ70のロッド先端部とロッド72は連結部材73で連結されている。 As shown in FIGS. 17 and 18, the electric cylinder 70 and the brake 71 provided on the rear wheel 3 are connected by a rod 72 extending in the front-rear direction. Note that the rod tip of the electric cylinder 70 and the rod 72 are connected by a connecting member 73.

操縦部6に設けられたブレーキスイッチ(図示省略)をONにした場合には、電動シリンダ70のロッドが縮んでロッド72を前側に移動させてブレーキ71を作動させて後輪3の駆動を停止させることができる。これにより、緊急時にブレーキスイッチをONにして電動シリンダ70を駆動させて作業車両の走行を緊急停止することができる。 When the brake switch (not shown) provided in the control unit 6 is turned on, the rod of the electric cylinder 70 contracts, moves the rod 72 forward, activates the brake 71, and stops driving the rear wheel 3. can be done. As a result, in an emergency, the brake switch can be turned ON to drive the electric cylinder 70, thereby making it possible to emergency stop the traveling of the work vehicle.

また、ブレーキスイッチをOFFにした場合には、電動シリンダ70のロッドが伸びてロッド72を後側に移動させてブレーキ71の作動を停止させて後輪3を駆動させることができる。 Furthermore, when the brake switch is turned OFF, the rod of the electric cylinder 70 is extended and the rod 72 is moved rearward, stopping the operation of the brake 71 and driving the rear wheel 3.

ロッド72の前側部は、ブレーキペダル68の後部に連結されている。ブレーキペダル68を踏込んだ場合には、ブレーキペダル68が左右方向に延在する支軸68Aを中心として反時計方向に回転してロッド72を前側に移動させることができる。これにより、電動シリンダ70が作動不良に陥った場合にもブレーキペダル68を踏込んでブレーキ71を作動させることができ安全性を高めることができる。 The front portion of the rod 72 is connected to the rear portion of the brake pedal 68. When the brake pedal 68 is depressed, the brake pedal 68 can rotate counterclockwise about the support shaft 68A extending in the left-right direction, thereby moving the rod 72 forward. Thereby, even if the electric cylinder 70 malfunctions, the brake pedal 68 can be depressed to operate the brake 71, thereby increasing safety.

また、ブレーキペダル68の踏込みを止めた場合には、ブレーキペダル68の下部に設けられたスプリング等の牽引手段69によってブレーキペダル68が支軸68Aを中心として時計方向に回転しロッド72を後側に移動してブレーキ71の作動を停止させて後輪3を駆動させることができる。 Further, when the brake pedal 68 is stopped being depressed, the brake pedal 68 is rotated clockwise about the support shaft 68A by a traction means 69 such as a spring provided at the bottom of the brake pedal 68, and the rod 72 is moved rearward. The rear wheel 3 can be driven by moving the brake 71 to stop the operation of the brake 71.

1 走行車体
2 前輪
2L 左前輪
2R 右前輪
3 後輪
4 作業機
5 ボンネット部
6 操縦部
10 走行車体本体
11 ステアリングポスト
12L 左支持部材
12R 右支持部材
13L 左支持部材
13R 右支持部材
15 緩衝部材
30 電動機(第1電動機)
40 電動機(第2電動機)
50 バッテリ
52 バッテリブラケット(ブラケット)
53L 左防振部材
53R 右防振部材
55L 左仮想線
55R 右仮想線
1 Traveling vehicle body 2 Front wheel 2L Left front wheel 2R Right front wheel 3 Rear wheel 4 Work equipment 5 Bonnet section 6 Control section 10 Traveling vehicle body body 11 Steering post 12L Left support member 12R Right support member 13L Left support member 13R Right support member 15 Buffer member 30 Electric motor (first electric motor)
40 Electric motor (second electric motor)
50 Battery 52 Battery bracket (bracket)
53L Left anti-vibration member 53R Right anti-vibration member 55L Left imaginary line 55R Right imaginary line

Claims (4)

走行車体(1)の前部に左右一対の前輪(2)を設け、該走行車体(1)の後部に左右一対の後輪(3)を設け、前記走行車体(1)の下面に芝等の雑草を刈取る作業機(4)を設け
前記走行車体(1)の上面における前側に所定の空間が形成されたボンネット部(5)を設け、該ボンネット部(5)の後側に操縦者が搭乗する操縦部(6)を設けた作業車両において
前記後輪(3)を駆動する第1電動機(30)と、前記作業機(4)を駆動する第2電動機(40)を設け、
前記ボンネット部(5)に、前記第1電動機(30)と第2電動機(40)に供給する電力を蓄電するバッテリ(50)を設け、
バッテリ(50)に外嵌されたブラケット(52)を、前後方向に延在する左前後フレーム(52L)と、前後方向に延在する右前後フレーム(52R)と、前記左前後フレーム(52L)と右前後フレーム(52R)の前部を連結する前左右フレーム(52A)と、前記左前後フレーム(52L)と右前後フレーム(52R)の後部を連結する後左右フレーム(52B)で形成し、
前記走行車体(1)の左部に設けられた左支持部材(12L,13L)と左前後フレーム(52L)を左防振部材(53L)を介して連結し、
前記走行車体(1)の右部に設けられた右支持部材(12R,13R)と右前後フレーム(52R)を右防振部材(53R)を介して連結したことを特徴とする作業車両。
A pair of left and right front wheels (2) are provided at the front of the vehicle body (1), a pair of left and right rear wheels (3) are provided at the rear of the vehicle body (1), and grass, etc. is provided on the lower surface of the vehicle body (1). A work machine (4) is installed to cut weeds .
A work in which a bonnet part (5) in which a predetermined space is formed is provided on the front side of the upper surface of the traveling vehicle body (1), and a control part (6) on which an operator rides is provided on the rear side of the bonnet part (5). In the vehicle ,
A first electric motor (30) that drives the rear wheel (3) and a second electric motor (40) that drives the working machine (4) are provided,
A battery (50) is provided in the bonnet portion (5) for storing power to be supplied to the first electric motor (30) and the second electric motor (40),
The bracket (52) fitted onto the battery (50) is connected to a left front and rear frame (52L) extending in the front and back direction, a right front and rear frame (52R) extending in the front and rear direction, and the left front and rear frame (52L). ), and a front left and right frame (52A) connecting the front part of the right front and rear frame (52R), and a rear left and right frame (52B) connecting the rear part of the left front and rear frame (52L) and the right front and rear frame (52R). ,
A left support member (12L, 13L) provided on the left side of the traveling vehicle body (1) and a left front and rear frame (52L) are connected via a left vibration isolating member (53L),
A work vehicle characterized in that a right support member (12R, 13R) provided on the right side of the traveling vehicle body (1) and a right front and rear frame (52R) are connected via a right vibration isolating member (53R).
前記左支持部材(12L,13L)を前後方向に所定の間隔を隔てて設け、
前記右支持部材(12R,13R)を前後方向に所定の間隔を隔てて設け、
前記左防振部材(53L)を左前後フレーム(52L)に前後方向に所定の間隔を隔てて設け、
前記右防振部材(53R)を右前後フレーム(52R)に前後方向に所定の間隔を隔てて設け、
正面視において、前記左支持部材(12L,13L)の連結部と左前後フレーム(52L)の連結部を左上がり傾斜に形成し、前記右支持部材(12R,13R)の連結部と右前後フレーム(52R)の連結部を右上がり傾斜に形成した請求項1記載の作業車両。
The left support members (12L, 13L) are provided at a predetermined interval in the front and rear direction,
The right support members (12R, 13R) are provided at a predetermined interval in the front-rear direction,
The left vibration isolating member (53L) is provided on the left front and rear frame (52L) at a predetermined interval in the front and rear direction,
The right vibration isolating member (53R) is provided on the right front and rear frame (52R) at a predetermined interval in the front and rear direction,
In a front view, the connecting portion of the left support members (12L, 13L) and the connecting portion of the left front and rear frame (52L) are formed to be inclined upward to the left, and the connecting portion of the right support member (12R, 13R) and the right front and rear frame are formed to be inclined upward to the left. 2. The work vehicle according to claim 1, wherein the connecting portion (52R) is formed to slope upward to the right.
正面視において、前記左支持部材(12L,13L)の連結部と左前後フレーム(52L)の連結部を、前記左防振部材(53L)の中心と前輪(2)の左前輪(2L)の中心を結ぶ左仮想線(55L)と直交させて形成し、前記右支持部材(12R,13R)の連結部と右前後フレーム(52R)の連結部を、前記右防振部材(53R)の中心と前輪(2)の右前輪(2R)の中心をとおる右仮想線(55R)と直交させて形成した請求項2記載の作業車両。 In front view, the connecting portion of the left support member (12L, 13L) and the connecting portion of the left front and rear frame (52L) are connected to the center of the left vibration isolating member (53L) and the left front wheel (2L) of the front wheel (2). The connection part of the right support member (12R, 13R) and the connection part of the right front and rear frame (52R) are formed perpendicularly to the left imaginary line (55L) connecting the centers, and the connection part of the right support member (12R, 13R) is connected to the center of the right vibration isolating member (53R). 3. The work vehicle according to claim 2, wherein the right imaginary line (55R) passing through the center of the right front wheel (2R) of the front wheels (2) is formed perpendicularly to the right imaginary line (55R). 側面視において、前記走行車体(1)を前後方向に延在する走行車体本体(10)と、前記操縦部(6)のステアリングシャフト(63)を支持する上下方向に延在するステアリングポスト(11)で形成し、
前記ステアリングポスト(11)の前面の下部に左右方向に所定の間隔を隔てて緩衝部材(15)を設け、
前記バッテリ(50)の後面に、前記緩衝部材(15)の先端部を押当てた請求項1~3のいずれか1項に記載の作業車両。
In a side view, the traveling vehicle body (1) includes a vehicle body main body (10) extending in the longitudinal direction, and a steering post (11) extending in the vertical direction supporting the steering shaft (63) of the control section (6). ),
A buffer member (15) is provided at a lower part of the front surface of the steering post (11) at a predetermined interval in the left-right direction,
The work vehicle according to any one of claims 1 to 3, wherein the front end of the buffer member (15) is pressed against the rear surface of the battery (50).
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