JP4874838B2 - Rough terrain vehicle - Google Patents

Rough terrain vehicle Download PDF

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JP4874838B2
JP4874838B2 JP2007056047A JP2007056047A JP4874838B2 JP 4874838 B2 JP4874838 B2 JP 4874838B2 JP 2007056047 A JP2007056047 A JP 2007056047A JP 2007056047 A JP2007056047 A JP 2007056047A JP 4874838 B2 JP4874838 B2 JP 4874838B2
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running
traveling
foot
frames
end side
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JP2008213730A (en
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淳 寺島
泰彦 堀
圭司 松本
秀和 丹生
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Yanmar Co Ltd
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Yanmar Co Ltd
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Description

本発明は、山林で伐採した材木を運搬する運搬車又は水辺の藻を刈取る作業車等の不整地用走行車両に係り、より詳しくは、走行部に左右の脚体を介して前記作業機体を支持する不整地用走行車両に関するものである。   The present invention relates to a traveling vehicle for rough terrain, such as a transport vehicle for transporting timber cut down in a forest or a work vehicle for cutting waterside algae, and more specifically, the working machine body via left and right legs on a traveling portion. The present invention relates to a traveling vehicle for rough terrain that supports the vehicle.

この種の不整地用走行車両は、特許文献1に示されているように、左右の前側走行部と、左右の後側走行部とを備え、左右の前側走行部及び左右の後側走行部にリンク機構を介してボディ(作業機体)を支持させていた。また、オペレータ等が搭乗する運転キャビン(作業機体)を水平に保持する技術も公知である(特許文献2参照)。
特開昭63−203483号公報 特開平5−77618号公報
As shown in Patent Document 1, this type of rough terrain traveling vehicle includes left and right front traveling units and left and right rear traveling units, and left and right front traveling units and left and right rear traveling units. The body (working machine body) was supported through the link mechanism. Further, a technique for horizontally holding an operation cabin (work machine) on which an operator or the like boardes is also known (see Patent Document 2).
JP 63-203483 A JP-A-5-77618

ところで、特許文献1又は特許文献2のように、フレームによって左右及び前後の走行部が連結されている場合、左の走行部又は右の走行部の前後方向の接地幅を簡単に変更できないから、路面抵抗が大きい場所での旋回抵抗を簡単に低減できない等の問題がある。また、前後の走行部を個別に上下動できないから、走行部の旋回抵抗を低減しながら、走行部の接地圧を簡単に確保できない等の問題がある。また、機体重心を前後方向に移動しながら、前後の走行部の接地圧を低減できないから、前後の走行部のいずれか一方を地上に持上げて、左右の前側走行部又は左右の後側走行部だけで移動することができない等の問題がある。   By the way, as in Patent Document 1 or Patent Document 2, when the left and right and front and rear traveling units are connected by a frame, the ground contact width in the front-rear direction of the left traveling unit or the right traveling unit cannot be easily changed. There is a problem that the turning resistance cannot be easily reduced in a place where the road surface resistance is large. In addition, since the front and rear traveling units cannot be moved up and down individually, there is a problem that the ground pressure of the traveling unit cannot be easily secured while reducing the turning resistance of the traveling unit. Also, since the ground contact pressure of the front and rear traveling units cannot be reduced while moving the center of gravity of the aircraft in the front-rear direction, either the front or rear traveling unit is lifted to the ground, and the left or right front traveling unit or the left or right rear traveling unit There are problems such as being unable to move.

本発明の目的は、左右の前側走行部及び左右の後側走行部の旋回抵抗を簡単に低減できるものでありながら、走行部の接地圧を簡単に確保でき、且つ左右の前側走行部又は左右の後側走行部だけで移動できるようにした不整地用走行車両を提供するものである。   It is an object of the present invention to easily reduce the turning resistance of the left and right front running units and the left and right rear running units, while easily ensuring the ground pressure of the running unit, and to detect the left and right front running units or the left and right running units. The present invention provides a rough terrain vehicle that can be moved only by a rear traveling part.

前記目的を達成するため、請求項1に係る発明の不整地用走行車両は、左右の前側走行部と、左右の後側走行部と、駆動源及び作業機を配置する作業機体と、前記前側走行部及び後側走行部に前記作業機体を支持する左右の脚体とを備え、左右の脚体を屈曲可能に構成してなる不整地用走行車両において、前記左右の脚体の下端側に、左右の前側足関節軸及び左右の後側足関節軸を介して、左右の前側走行部の後端側及び左右の後側走行部の前端側を連結し、左右の前側走行部の前端側及び左右の後側走行部の後端側が、左右の前側足関節軸及び左右の後側足関節軸回りに上下動するように構成する一方、前記左右の脚体の上端側に前記作業機体を回動可能に連結する股関節軸を備え、前記股関節軸の軸芯回りに前記作業機体を回動して水平姿勢に維持可能に構成し、前記作業機体に対して前記左右の脚体の相対連結角度を変更する左右の股関節油圧シリンダと、前記作業機体の前後方向の傾斜角を変更するピッチ油圧シリンダとを備え、前記左右の股関節油圧シリンダによって前記股関節軸回りに前記左右の脚体を回動可能に構成し、前記ピッチ油圧シリンダによって前記股関節軸回りに前記作業機体を回動可能に構成したものである。 In order to achieve the above object, the rough terrain vehicle of the invention according to claim 1 includes a left and right front traveling unit, a left and right rear traveling unit, a working machine body in which a drive source and a work implement are disposed, and the front side In a traveling vehicle for rough terrain comprising left and right legs that support the work machine body in a traveling part and a rear traveling part, and the left and right legs are configured to be bendable, on the lower end side of the left and right legs The left and right front running parts and the left and right rear running parts are connected to the front end sides of the left and right front running parts via the left and right front foot joint axes and the left and right rear foot joint axes. And the rear end side of the left and right rear running parts are configured to move up and down around the left and right front ankle joint axes and the left and right rear ankle joint axes, while the working machine body is arranged on the upper end side of the left and right legs. A hip joint shaft that is pivotably connected, and the work machine body is pivoted about an axis of the hip joint shaft to Left and right hip hydraulic cylinders that change the relative connection angle of the left and right legs with respect to the work machine body, and a pitch hydraulic cylinder that changes the tilt angle in the front-rear direction of the work machine body. The left and right legs are configured to be rotatable about the hip joint axis by the left and right hip joint hydraulic cylinders, and the work machine body is configured to be rotatable about the hip joint axis by the pitch hydraulic cylinders. .

請求項2に記載の発明は、請求項1に記載の不整地用走行車両において、前記左右の前側走行部の前端側を前記左右の前側足関節軸回りに上下動する左右の前側昇降機構と、前記左右の後側走行部の後端側を前記左右の後側足関節軸回りに上下動する左右の後側昇降機構とを備えたものである。   According to a second aspect of the present invention, in the rough terrain vehicle according to the first aspect, the left and right front lifting mechanisms that vertically move the front end sides of the left and right front traveling portions around the left and right front ankle joint axes; And a left and right rear elevating mechanism for moving the rear end side of the left and right rear running parts up and down around the left and right rear ankle joint axes.

請求項3に記載の発明は、請求項1に記載の不整地用走行車両において、前記左右の脚体は、前記左右の前側走行部を支持する左右の前側足フレームと、前記左右の後側走行部を支持する左右の後側足フレームとを有し、前記左右の前側足フレームに前記左右の前側足関節軸を介して左右の足根フレームを連結し、前記左右の後側足フレームに前記左右の後側足関節軸を介して前記左右の足根フレームを連結したものである。   According to a third aspect of the present invention, in the traveling vehicle for rough terrain according to the first aspect, the left and right legs include left and right front foot frames that support the left and right front traveling portions, and the left and right rear sides. Left and right rear foot frames that support the traveling portion, and the left and right foot frames are connected to the left and right front foot frames via the left and right front foot joint axes, and the left and right rear foot frames The left and right foot frame is connected via the left and right rear foot joint axes.

請求項1に係る発明によれば、左右の前側走行部と、左右の後側走行部と、駆動源及び作業機を配置する作業機体と、前記前側走行部及び後側走行部に前記作業機体を支持する左右の脚体とを備え、左右の脚体を屈曲可能に構成してなる不整地用走行車両において、前記左右の脚体の下端側に、左右の前側足関節軸及び左右の後側足関節軸を介して、左右の前側走行部の後端側及び左右の後側走行部の前端側を連結し、左右の前側走行部の前端側及び左右の後側走行部の後端側が、左右の前側足関節軸及び左右の後側足関節軸回りに上下動するように構成する一方、前記左右の脚体の上端側に前記作業機体を回動可能に連結する股関節軸を備え、前記股関節軸の軸芯回りに前記作業機体を回動して水平姿勢に維持可能に構成し、前記作業機体に対して前記左右の脚体の相対連結角度を変更する左右の股関節油圧シリンダと、前記作業機体の前後方向の傾斜角を変更するピッチ油圧シリンダとを備え、前記左右の股関節油圧シリンダによって前記股関節軸回りに前記左右の脚体を回動可能に構成し、前記ピッチ油圧シリンダによって前記股関節軸回りに前記作業機体を回動可能に構成したものであるから、左の走行部又は右の走行部の前後方向の接地幅を変更して、路面抵抗が大きい場所での旋回抵抗を簡単に低減できる。軟弱路面の移動において、走行部の前後方向の接地幅を長くして接地圧を低減でき、且つ旋回抵抗が大きくなる場所では、走行部の前後方向の接地幅を短くして旋回抵抗を低減でき、不整地での走行性能を向上できるものである。 According to the first aspect of the present invention, the left and right front traveling parts, the left and right rear traveling parts, the work machine body in which the drive source and the work machine are disposed, and the work machine body in the front running part and the rear running part. In a rough terrain vehicle comprising left and right legs that support the left and right legs, the right and left front ankle joint shafts and the left and right rear legs are disposed at the lower ends of the left and right legs. The rear end side of the left and right front running parts and the front end side of the left and right rear running parts are connected via the side foot joint shaft, and the front end side of the left and right front running parts and the rear end side of the left and right rear running parts are A hip joint shaft that is configured to move up and down around the left and right front foot joint axes and the left and right rear foot joint shafts, and rotatably connects the work machine body to the upper end side of the left and right legs , The work machine body is configured to be able to rotate around the axis of the hip joint axis and maintain a horizontal posture. Left and right hip hydraulic cylinders for changing the relative connecting angle of the left and right legs, and a pitch hydraulic cylinder for changing the tilt angle in the front-rear direction of the work machine body. The left and right legs are configured to be rotatable about the hip joint axis, and the work machine body is configured to be rotatable about the hip joint axis by the pitch hydraulic cylinder. By changing the ground contact width in the front-rear direction, it is possible to easily reduce the turning resistance in a place where the road surface resistance is large. When moving on soft roads, the ground contact width in the front-rear direction of the traveling part can be increased to reduce the ground pressure, and in places where the turning resistance increases, the grounding width in the front-rear direction of the traveling part can be shortened to reduce the turning resistance. The driving performance on rough terrain can be improved.

請求項2に係る発明によれば、前記左右の前側走行部の前端側を前記左右の前側足関節軸回りに上下動する左右の前側昇降機構と、前記左右の後側走行部の後端側を前記左右の後側足関節軸回りに上下動する左右の後側昇降機構とを備えたものであるから、前後の走行部を個別に上下動でき、走行部の旋回抵抗を低減しながら、走行部の接地圧を簡単に確保できるものである。   According to the second aspect of the present invention, the left and right front elevating mechanisms that vertically move the front end sides of the left and right front running portions around the left and right front ankle joint axes, and the rear end sides of the left and right rear running portions With the left and right rear lifting mechanisms that move up and down around the left and right rear foot joint axes, the front and rear traveling parts can be individually moved up and down while reducing the turning resistance of the traveling part, The ground pressure of the traveling part can be easily secured.

請求項3に係る発明によれば、前記左右の脚体は、前記左右の前側走行部を支持する左右の前側足フレームと、前記左右の後側走行部を支持する左右の後側足フレームとを有し、前記左右の前側足フレームに前記左右の前側足関節軸を介して左右の足根フレームを連結し、前記左右の後側足フレームに前記左右の後側足関節軸を介して前記左右の足根フレームを連結したものであるから、機体重心を前後方向に移動しながら、前記左右の前側走行部又は前記左右の後側走行部の少なくともいずれか一方又は両方の接地圧を簡単に低減できる。前記左右の前側走行部又は前記左右の後側走行部のいずれか一方を地上に持上げた状態で、左右の前側走行部又は左右の後側走行部のいずれか他方だけを利用して移動することができるものである。   According to a third aspect of the present invention, the left and right legs include left and right front foot frames that support the left and right front running portions, and left and right rear foot frames that support the left and right rear running portions. The left and right foot frames are connected to the left and right front foot frames via the left and right front foot joint axes, and the left and right rear foot frames are connected to the left and right rear foot joint shafts via the left and right rear foot joint shafts. Since the left and right foot frames are connected, the ground pressure of at least one or both of the left and right front running parts and the left and right rear running parts can be easily changed while moving the center of gravity of the aircraft in the front-rear direction. Can be reduced. With either one of the left and right front running units or the left and right rear running units lifted to the ground, the vehicle uses only the other of the left and right front running units or the left and right rear running units. It is something that can be done.

以下、本発明の実施の形態を、不整地用走行車両としての材木運搬車に適用した場合の図面について説明する。図1は材木運搬車の斜視図、図2は材木運搬車1の側面図、図3は同平面図、図4は後側走行部2a,2b及び前側走行部3a,3bの斜視図、図5は脚体5a,5bの側面図、図6は左右の脚体5a,5bを上方から視た斜視図、図7は左右の脚体5a,5bを下方から視た斜視図である。なお、以下の説明では、材木運搬車1の前進方向に向かって左側を単に左側と称し、同じく前進方向に向かって右側を単に右側と称する。   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, drawings when an embodiment of the present invention is applied to a timber transport vehicle as a rough terrain vehicle will be described. 1 is a perspective view of a timber transporter, FIG. 2 is a side view of the timber transporter 1, FIG. 3 is a plan view thereof, and FIG. 4 is a perspective view of rear travel units 2a and 2b and front travel units 3a and 3b. 5 is a side view of the legs 5a and 5b, FIG. 6 is a perspective view of the left and right legs 5a and 5b as viewed from above, and FIG. 7 is a perspective view of the left and right legs 5a and 5b as viewed from below. In the following description, the left side in the forward direction of the timber transport vehicle 1 is simply referred to as the left side, and the right side in the forward direction is also simply referred to as the right side.

図1乃至図3に示されるように、材木運搬車1は、左右の後側走行部2a,2bと、左右の前側走行部3a,3bと、後述する駆動源としてのエンジン20、油圧機器21、及び作業機としての丸太握持アーム22等を配置する作業機体4と、後側走行部2a,2b及び前側走行部3a,3bに作業機体4を支持する左右の脚体5a,5bとを備えている。   As shown in FIGS. 1 to 3, the timber transport vehicle 1 includes a left and right rear traveling units 2 a and 2 b, left and right front traveling units 3 a and 3 b, an engine 20 as a drive source described later, and a hydraulic device 21. , And a work machine body 4 in which a log gripping arm 22 or the like as a work machine is arranged, and left and right legs 5a and 5b that support the work machine body 4 on the rear traveling units 2a and 2b and the front traveling units 3a and 3b. I have.

図2に示されるように、作業機体4には、オペレータが搭乗する運転キャビン23と、丸太扼持アーム22によって丸太24を載せる荷台25とを備える。運転キャビン23は、オペレータが座乗する操縦座席26と、左の前側走行部2a及び後側走行部3aと右の前側走行部2b及び後側走行部3bとを差動させて進路を変更操作(舵取り)する操縦ハンドル27と、左右の後側走行部2a,2b及び左右の前側走行部3a,3bの駆動速度の変更(車速の変速)と回転方向の変更(前進と後進の切換)とを操作する走行変速レバー28と、左右の後側走行部2a,2b又は左右の前側走行部3a,3bを制動操作するブレーキペダル29とを有する。また、運転キャビン23内の設置台98に遠隔操縦器99を取外し可能に配置する。材木運搬車1は、主として遠隔操縦器99によって操縦して、材木の積み下ろし及び運搬等の作業を実行するが、オペレータが操縦座席26に座乗して材木を積み下ろしたり運搬できるように構成している。   As shown in FIG. 2, the work machine body 4 includes an operation cabin 23 on which an operator gets on, and a loading platform 25 on which a log 24 is placed by a log holding arm 22. The driving cabin 23 is configured to change the course by making the control seat 26 on which the operator sits, the left front traveling unit 2a and the rear traveling unit 3a, the right front traveling unit 2b and the rear traveling unit 3b differential. (Steering) the steering handle 27, the driving speed of the left and right rear traveling units 2a, 2b and the left and right front traveling units 3a, 3b (change in vehicle speed) and the rotation direction (switching between forward and reverse) And a brake pedal 29 for braking the left and right rear running portions 2a and 2b or the left and right front running portions 3a and 3b. Further, the remote controller 99 is detachably disposed on the installation table 98 in the operation cabin 23. The timber transport vehicle 1 is mainly operated by the remote controller 99 to perform operations such as loading and unloading of timber, but the operator can sit on the control seat 26 to load and unload timber. Yes.

図3及び図4に示されるように、左右の後側走行部2a,2b及び左右の前側走行部3a,3bは、複数のトラックローラ30を軸支したトラックフレーム31と、トラックフレーム31に回動可能に配置した駆動スプロケット32と、トラックフレーム31にテンション調節機構33を介して配置したテンションローラ34と、駆動スプロケット32を駆動する走行駆動油圧モータ35と、合成ゴム製の履帯形状の走行クローラ36とを有する。駆動スプロケット32と、テンションローラ34と、複数のトラックローラ30とを介して、トラックフレーム31に走行クローラ36を支持している。走行駆動油圧モータ35によって走行クローラ36が前進方向又は後進方向に駆動されることになる。   As shown in FIGS. 3 and 4, the left and right rear running units 2 a and 2 b and the left and right front running units 3 a and 3 b rotate around the track frame 31 and a track frame 31 that supports a plurality of track rollers 30. A drive sprocket 32 movably disposed, a tension roller 34 disposed on the track frame 31 via a tension adjusting mechanism 33, a travel drive hydraulic motor 35 for driving the drive sprocket 32, and a crawler-shaped travel crawler made of synthetic rubber 36. A travel crawler 36 is supported on the track frame 31 via a drive sprocket 32, tension rollers 34, and a plurality of track rollers 30. The travel crawler 36 is driven in the forward direction or the reverse direction by the travel drive hydraulic motor 35.

図5乃至図7に示されるように、左右の脚体5a,5bは、第1乃至第10の複数の軸によって、個別に折り曲げてそれぞれの姿勢を変更可能に構成している。即ち、第1軸及び第2軸として後述する左右の股関節軸7と、第3軸及び第4軸として後述する左右の膝関節軸6と、第5軸及び第6軸として後述する左右の足首関節軸5と、第7軸及び第8軸として後述する左右の後側足関節軸10と、第9軸及び第10軸として後述する左右の前側足関節軸11とを備えている。   As shown in FIGS. 5 to 7, the left and right legs 5 a and 5 b are configured to be individually bent by a plurality of first to tenth shafts to change their postures. That is, left and right hip joint shafts 7 described later as first and second axes, left and right knee joint shafts 6 described later as third and fourth axes, and left and right ankles described later as fifth and sixth axes. It includes a joint shaft 5, left and right rear foot joint shafts 10 to be described later as seventh and eighth axes, and left and right front foot joint shafts 11 to be described later as ninth and tenth axes.

図5乃至図7に示されるように、左右の脚体5a,5bは、それぞれ水平方向(横方向)に延びる足首関節軸5と、膝関節軸6と、股関節軸7とを有する。左右の脚体5a,5bに足首関節軸5を介して左右の後側走行部2a,2b及び左右の前側走行部3a,3bを連結する。左右の脚体5a,5bに股関節軸7を介して作業機体4を連結する。膝関節軸6を介して左右の脚体5a,5bが側面視でく形状に折り曲がるように構成している。   As shown in FIGS. 5 to 7, the left and right legs 5 a and 5 b each have an ankle joint shaft 5, a knee joint shaft 6, and a hip joint shaft 7 extending in the horizontal direction (lateral direction). The left and right rear running portions 2a and 2b and the left and right front running portions 3a and 3b are connected to the left and right legs 5a and 5b via the ankle joint shaft 5, respectively. The work machine body 4 is connected to the left and right legs 5a, 5b via the hip joint shaft 7. The left and right legs 5a and 5b are configured to be bent in a side view through the knee joint shaft 6.

図5乃至図7に示されるように、左右の脚体5a,5bは、第1乃至第10の複数のフレームによって、個別に折り曲げてそれぞれの姿勢を変更可能に構成している。即ち、第1フレーム及び第2フレームとして後述する左右の後側足フレーム8a,8bと、第3フレーム及び第4フレームとして後述する左右の前側足フレーム9a,9bと、第5フレーム及び第6フレームとして後述する左右の足根フレーム12a,12bと、第7フレーム及び第8フレームとして後述する左右の脛フレーム13a,13bと、第9フレーム及び第10フレームとして後述する左右の大腿フレーム14a,14bとを備えている。   As shown in FIGS. 5 to 7, the left and right legs 5 a and 5 b are configured to be individually bent by a plurality of first to tenth frames and change their postures. That is, left and right rear foot frames 8a and 8b, which will be described later as first and second frames, left and right front foot frames 9a and 9b, which will be described later as third and fourth frames, and fifth and sixth frames. Left and right foot frames 12a and 12b, which will be described later, left and right shin frames 13a and 13b which will be described later as seventh and eighth frames, and left and right thigh frames 14a and 14b which will be described later as ninth and tenth frames, respectively. It has.

図5乃至図7に示されるように、左右の脚体5a,5bは、左右の後側走行部2a,2bを支持する左右の後側足フレーム8a,8bと、左右の前側走行部3a,3bを支持する左右の前側足フレーム9a,9bと、左右の後側足フレーム8a,8bの前端側(左右の前側足フレーム9a,9bの後端側)に左右の後側足関節軸10(前側足関節軸11)を介して後端側(前端側)を連結する左右の足根フレーム12a,12bと、左右の足根フレーム12a,12bの前後幅の中間の上端側に左右の足首関節軸5を介して下端側を連結する左右の脛フレーム13a,13bと、左右の脛フレーム13a,13bの上端側に左右の膝関節軸6を介して下端側を連結する左右の大腿フレーム14a,14bとを有している。左右の脚体5a,5bは、左右対称の構造に構成されている。   As shown in FIGS. 5 to 7, the left and right legs 5 a and 5 b include left and right rear foot frames 8 a and 8 b that support the left and right rear running portions 2 a and 2 b, and left and right front running portions 3 a and Left and right front foot frames 9a and 9b that support 3b, and left and right rear foot joint shafts 10 (on the rear end sides of the left and right front foot frames 9a and 9b) on the front end sides of the left and right rear foot frames 8a and 8b. The left and right foot frames 12a and 12b that connect the rear end side (front end side) via the front foot joint shaft 11) and the left and right ankle joints at the upper end in the middle of the front and rear width of the left and right foot frames 12a and 12b Left and right tibial frames 13a, 13b connecting the lower end side via the shaft 5, and left and right thigh frames 14a connecting the lower end side via the left and right knee joint shafts 6 to the upper end side of the left and right tibial frames 13a, 13b, 14b. The left and right legs 5a and 5b are configured in a symmetrical structure.

図2乃至図5に示されるように、左右の前側走行部3a,3bと、左右の後側走行部2a,2bと、駆動源としてのエンジン20及び作業機としての丸太握持アーム22を配置する作業機体4と、前側走行部3a,3b及び後側走行部2a,2bに作業機体4を支持する左右の脚体5a,5bとを備える。左右の脚体5a,5bは、足首関節軸5と、膝関節軸6と、股関節軸7とを有し、左右の脚体5a,5bに足首関節軸5を介して左右の前側走行部3a,3b及び左右の後側走行部2a,2bを連結し、左右の脚体5a,5bに股関節軸7を介して作業機体4を連結し、膝関節軸6を介して左右の脚体5a,5bが折り曲がるように構成している。したがって、左右の前側走行部3a,3b及び左右の後側走行部2a,2bを接地させた状態で、前後方向、左右方向、上下方向に機体重心を移動でき、作業機体4の地上高を簡単に変更できる。また、左右の脚体5a,5bを互い違いにして、前後の走行部2a,2b,3a,3bの前後方向の最大接地幅を簡単に大きくすることができ、進行方向の幅が大きなくぼ地を簡単に乗り越えることができる。   As shown in FIGS. 2 to 5, left and right front running units 3a and 3b, left and right rear running units 2a and 2b, an engine 20 as a drive source, and a log gripping arm 22 as a working machine are arranged. And the left and right legs 5a and 5b for supporting the work machine body 4 on the front side travel parts 3a and 3b and the rear side travel parts 2a and 2b. The left and right legs 5a, 5b have an ankle joint axis 5, a knee joint axis 6, and a hip joint axis 7. The left and right front running parts 3a are connected to the left and right legs 5a, 5b via the ankle joint axis 5. , 3b and the left and right rear running portions 2a, 2b, the left and right legs 5a, 5b are connected to the work machine body 4 via the hip joint shaft 7, and the left and right legs 5a, 5k are connected via the knee joint shaft 6. 5b is configured to be bent. Therefore, the center of gravity of the machine body can be moved in the front-rear direction, the left-right direction, and the up-down direction with the left and right front running units 3a and 3b and the left and right rear running units 2a and 2b being grounded, and the ground height of the work machine 4 can be easily Can be changed. In addition, the left and right legs 5a and 5b are staggered so that the maximum ground contact width in the front-rear direction of the front and rear traveling portions 2a, 2b, 3a, 3b can be easily increased, and the depression in which the width in the traveling direction is large. Can be easily overcome.

図5乃至図7に示されるように、作業機体4は坐フレーム15を有し、左右の脚体5a,5bの各大腿フレーム14a,14bの上下幅の中間に股関節軸7を介して坐フレーム15の前後幅の中間を連結している。股関節軸7回りに坐フレーム15が回動することによって、坐フレーム15の前端側(後端側)が上動(下動)又は下動(上動)し、坐フレーム15の前後方向の傾斜角が変更されることになる。   As shown in FIGS. 5 to 7, the working machine body 4 has a seat frame 15, and the seat frame is interposed between the upper and lower widths of the thigh frames 14 a and 14 b of the left and right legs 5 a and 5 b via the hip joint shaft 7. The middle of 15 front and rear widths are connected. By rotating the seat frame 15 around the hip joint axis 7, the front end side (rear end side) of the seat frame 15 moves upward (downward) or downward (upward), and the seat frame 15 tilts in the front-rear direction. The corner will be changed.

図5乃至図7に示されるように、左右の脚体5a,5bは、第1乃至第10の複数の油圧シリンダによって、個別に折り曲げてそれぞれの姿勢を変更可能に構成している。即ち、第1油圧シリンダ及び第2油圧シリンダとして後述する左右の股関節油圧シリンダ44a,44bと、第3油圧シリンダ及び第4油圧シリンダとして後述する左右の膝関節油圧シリンダ48a,48bと、第5油圧シリンダ及び第6油圧シリンダとして後述する左右の足首関節油圧シリンダ52a,52bと、第7油圧シリンダ及び第8油圧シリンダとして後述する左右のかかと関節油圧シリンダ56a,56bと、第9油圧シリンダ及び第10油圧シリンダとして後述する左右のつま先関節油圧シリンダ60a,60bとを備えている。   As shown in FIGS. 5 to 7, the left and right legs 5 a and 5 b are configured to be individually bent by a plurality of first to tenth hydraulic cylinders to change their postures. That is, left and right hip joint hydraulic cylinders 44a and 44b, which will be described later as first and second hydraulic cylinders, left and right knee joint hydraulic cylinders 48a and 48b, which will be described later as third and fourth hydraulic cylinders, and a fifth hydraulic pressure. Left and right ankle joint hydraulic cylinders 52a and 52b, which will be described later as cylinders and sixth hydraulic cylinders, left and right heel joint hydraulic cylinders 56a and 56b, which will be described later as seventh hydraulic cylinders and eighth hydraulic cylinders, ninth hydraulic cylinders and tenth hydraulic cylinders Left and right toe joint hydraulic cylinders 60a and 60b, which will be described later, are provided as hydraulic cylinders.

股関節軸7に側面視L形状の中間を回動可能に被嵌したピッチアーム40と、坐フレーム15の前後方向の傾斜角を調節するための水平機構としてのピッチ油圧シリンダ16とを備える。坐フレーム15の前端側に軸体41を介してピッチ油圧シリンダ16を連結する。ピッチ油圧シリンダ16のピストン16aの先端側に軸体42を介してピッチアーム40のL形状の一端側を連結する。また、左右の大腿フレーム14a,14bの下端側に軸体43を介して左右の股関節油圧シリンダ44a,44bを連結する。股関節油圧シリンダ44a,44bのピストン45の先端側に軸体46を介してピッチアーム40のL形状の他端側を連結する。   A pitch arm 40 that is fitted to the hip joint shaft 7 so as to be rotatable in the middle of the L shape in a side view and a pitch hydraulic cylinder 16 as a horizontal mechanism for adjusting the tilt angle in the front-rear direction of the seat frame 15 are provided. A pitch hydraulic cylinder 16 is connected to the front end side of the seat frame 15 via a shaft body 41. The L-shaped one end side of the pitch arm 40 is connected to the tip end side of the piston 16 a of the pitch hydraulic cylinder 16 via the shaft body 42. In addition, left and right hip joint hydraulic cylinders 44a and 44b are connected to the lower ends of the left and right thigh frames 14a and 14b via a shaft body 43. The other end side of the L-shape of the pitch arm 40 is connected to the tip end side of the piston 45 of the hip joint hydraulic cylinders 44 a and 44 b via the shaft body 46.

その結果、ピッチ油圧シリンダ16によって股関節軸7回りに坐フレーム15を回動して、坐フレーム15の前後方向の傾斜を修正して前後方向に水平に支持することになる。また、左右の股関節油圧シリンダ44a,44bによって股関節軸7回りに坐フレーム15が回動して、坐フレーム15と左右の大腿フレーム14a,14bとの相対的な連結角度を変更することになる。   As a result, the seat frame 15 is rotated around the hip joint axis 7 by the pitch hydraulic cylinder 16, and the tilt of the seat frame 15 in the front-rear direction is corrected and horizontally supported in the front-rear direction. Further, the seat frame 15 is rotated around the hip joint axis 7 by the left and right hip joint hydraulic cylinders 44a and 44b, and the relative connection angle between the seat frame 15 and the left and right thigh frames 14a and 14b is changed.

即ち、左右の股関節油圧シリンダ44a,44bを作動させながら、ピッチ油圧シリンダ16を作動させることによって、坐フレーム15の前後方向の傾斜が略水平に維持された状態で、坐フレーム15と左右の大腿フレーム14a,14bとの相対角度が変更されることになる。なお、左右の股関節油圧シリンダ44a,44bを各別に作動することによって、坐フレーム15に対する左右の大腿フレーム14a,14bの相対角度は独立してそれぞれ変更される。   That is, by operating the pitch hydraulic cylinder 16 while operating the left and right hip joint hydraulic cylinders 44a, 44b, the seat frame 15 and the left and right thighs are maintained in a state where the tilt in the front-rear direction of the seat frame 15 is maintained substantially horizontal. The relative angle with the frames 14a and 14b is changed. By operating the left and right hip joint hydraulic cylinders 44a and 44b separately, the relative angles of the left and right thigh frames 14a and 14b with respect to the seat frame 15 are independently changed.

図2乃至図5に示されるように、左右の脚体5a,5bは、足根フレーム12a,12bに足首関節軸11を介して連結する脛フレーム13a,13bと、脛フレーム13a,13bに膝関節軸6を介して連結する大腿フレーム14a,14bとを有し、作業機体4は坐フレーム15を有し、左右の脚体5a,5bの各大腿フレーム14a,14bに股関節軸7を介して坐フレーム15を連結し、坐フレーム15の前後方向の傾斜角を調節するための水平機構としてのピッチ油圧シリンダ16を備え、坐フレーム15を水平に支持するように構成している。したがって、作業機体4の地上高を確保しながら、作業機体4の左右方向及び前後方向の傾斜角を簡単に変更でき、作業機体4を安定した姿勢で支持できる。   As shown in FIGS. 2 to 5, the left and right legs 5 a and 5 b have tibial frames 13 a and 13 b that are connected to the foot frames 12 a and 12 b via the ankle joint shaft 11, and knees to the tibial frames 13 a and 13 b. The working machine body 4 has a seat frame 15 and is connected to the thigh frames 14a and 14b of the left and right legs 5a and 5b via the hip joint shaft 7. The seat frame 15 is connected, and a pitch hydraulic cylinder 16 is provided as a horizontal mechanism for adjusting the tilt angle of the seat frame 15 in the front-rear direction, and is configured to support the seat frame 15 horizontally. Therefore, while ensuring the ground clearance of the work machine body 4, the tilt angles in the left-right direction and the front-rear direction of the work machine body 4 can be easily changed, and the work machine body 4 can be supported in a stable posture.

左右の大腿フレーム14a,14bの上端側には、左右の軸体47を介して、左右の膝関節油圧シリンダ48a,48bをそれぞれ連結する。左右の膝関節油圧シリンダ48a,48bのピストン49の先端側には、左右の軸体50を介して、脛フレーム13a,13bの中間をそれぞれ連結する。その結果、左右の膝関節油圧シリンダ48a,48bを作動することによって、左右の膝関節軸6回りに左右の大腿フレーム14a,14bが回動して、左右の脛フレーム13a,13bと左右の大腿フレーム14a,14bとの相対的な連結角度がそれぞれ変更されることになる。なお、左右の膝関節油圧シリンダ48a,48bを各別に作動することによって、左右の脛フレーム13a,13bに対する左右の大腿フレーム14a,14bの相対角度は独立してそれぞれ変更される。   Left and right knee joint hydraulic cylinders 48a and 48b are connected to upper end sides of the left and right thigh frames 14a and 14b via left and right shaft bodies 47, respectively. Intermediate portions of the shin frames 13a and 13b are connected to the distal end sides of the pistons 49 of the left and right knee joint hydraulic cylinders 48a and 48b via left and right shaft bodies 50, respectively. As a result, by operating the left and right knee joint hydraulic cylinders 48a and 48b, the left and right thigh frames 14a and 14b rotate around the left and right knee joint axes 6, and the left and right tibial frames 13a and 13b and the left and right thigh frames are rotated. The relative connection angles with the frames 14a and 14b are respectively changed. By operating the left and right knee joint hydraulic cylinders 48a and 48b separately, the relative angles of the left and right thigh frames 14a and 14b with respect to the left and right tibial frames 13a and 13b are independently changed.

左右の脛フレーム13a,13bの上端側には、左右の軸体51を介して、左右の足首関節油圧シリンダ52a,52bをそれぞれ連結する。左右の足首関節油圧シリンダ52a,52bのピストン53の先端側には、左右の軸体54を介して、左右の足根フレーム12a,12bの前端側をそれぞれ連結する。その結果、左右の足首関節油圧シリンダ52a,52bを作動することによって、左右の足首関節軸5回りに左右の脛フレーム13a,13bが回動して、左右の足根フレーム12a,12bと左右の脛フレーム13a,13bとの相対的な連結角度がそれぞれ変更されることになる。なお、左右の足首関節油圧シリンダ52a,52bを各別に作動することによって、左右の足根フレーム12a,12bに対する左右の脛フレーム13a,13bの相対角度は独立してそれぞれ変更される。   Left and right ankle joint hydraulic cylinders 52a and 52b are connected to upper end sides of the left and right shin frames 13a and 13b via left and right shaft bodies 51, respectively. The front end sides of the left and right foot frames 12a and 12b are connected to the distal end sides of the pistons 53 of the left and right ankle joint hydraulic cylinders 52a and 52b via left and right shaft bodies 54, respectively. As a result, by operating the left and right ankle joint hydraulic cylinders 52a and 52b, the left and right tibial frames 13a and 13b rotate around the left and right ankle joint axes 5, and the left and right foot frames 12a and 12b The relative connection angles with the shin frames 13a and 13b are respectively changed. By operating the left and right ankle joint hydraulic cylinders 52a and 52b separately, the relative angles of the left and right shin frames 13a and 13b with respect to the left and right foot frames 12a and 12b are independently changed.

左右の足根フレーム12a,12bの後端側には、左右の軸体55を介して、左右のかかと関節油圧シリンダ56a,56bをそれぞれ連結する。左右のかかと関節油圧シリンダ56a,56bのピストン57の先端側には、左右の軸体58を介して、左右の後側足フレーム8a,8bの後端側をそれぞれ連結する。その結果、左右のかかと関節油圧シリンダ56a,56bを作動することによって、左右の後側足関節軸10回りに左右の後側足フレーム8a,8bが回動して、左右の後側足フレーム8a,8bと左右の足根フレーム12a,12bとの相対的な連結角度がそれぞれ変更されることになる。なお、左右のかかと関節油圧シリンダ56a,56bを各別に作動することによって、左右の足根フレーム12a,12bに対する左右の後側足フレーム8a,8bの相対角度は独立してそれぞれ変更される。   Left and right heel joint hydraulic cylinders 56a and 56b are connected to the rear end sides of the left and right foot frames 12a and 12b via left and right shaft bodies 55, respectively. The left and right rear foot frames 8a and 8b are connected to the front ends of the pistons 57 of the left and right heel joint hydraulic cylinders 56a and 56b via left and right shaft bodies 58, respectively. As a result, by operating the left and right heel joint hydraulic cylinders 56a and 56b, the left and right rear foot frames 8a and 8b rotate around the left and right rear foot joint shafts 10, and the left and right rear foot frames 8a. , 8b and the right and left foot frames 12a, 12b are respectively changed in relative connection angle. By operating the left and right heel joint hydraulic cylinders 56a and 56b separately, the relative angles of the left and right rear foot frames 8a and 8b with respect to the left and right foot frames 12a and 12b are independently changed.

左右の足根フレーム12a,12bの前端側には、左右の軸体59を介して、左右のつま先関節油圧シリンダ60a,60bをそれぞれ連結する。左右のつま先関節油圧シリンダ60a,60bのピストン61の先端側には、左右の軸体62を介して、左右の前側足フレーム9a,9bの前端側をそれぞれ連結する。その結果、左右のつま先関節油圧シリンダ60a,60bを作動することによって、左右の前側足関節軸11回りに左右の前側足フレーム9a,9bが回動して、左右の前側足フレーム9a,9bと左右の足根フレーム12a,12bとの相対的な連結角度がそれぞれ変更されることになる。なお、左右のつま先関節油圧シリンダ60a,60bを各別に作動することによって、左右の足根フレーム12a,12bに対する左右の前側足フレーム9a,9bの相対角度は独立してそれぞれ変更される。   Left and right toe joint hydraulic cylinders 60a and 60b are connected to the front end sides of the left and right foot frames 12a and 12b via left and right shaft bodies 59, respectively. The front end sides of the left and right front foot frames 9a and 9b are connected to the distal ends of the pistons 61 of the left and right toe joint hydraulic cylinders 60a and 60b via the left and right shaft bodies 62, respectively. As a result, by operating the left and right toe joint hydraulic cylinders 60a and 60b, the left and right front foot frames 9a and 9b rotate around the left and right front foot joint shafts 11, and the left and right front foot frames 9a and 9b The relative connection angles with the left and right foot frames 12a and 12b are respectively changed. By operating the left and right toe joint hydraulic cylinders 60a and 60b separately, the relative angles of the left and right front foot frames 9a and 9b with respect to the left and right foot frame 12a and 12b are independently changed.

図2乃至図5に示されるように、左右の脚体5a,5bは、前側走行部3a,3bを支持する前側足フレーム9a,9bと、後側走行部2a,2bを支持する後側足フレーム8a,8bとを有し、前側足フレーム9a,9bに前側足関節軸11を介して足根フレーム12a,12bを連結し、後側足フレーム8a,8bに後側足関節軸10を介して足根フレーム12a,12bを連結している。したがって、前側走行部3a,3bの前側又は後側走行部2a,2bの後側を上下方向に移動して迎え角を大きくすることができるから、大きな段差地を簡単に移動できる。また、前側走行部3a,3bの前側と後側走行部2a,2bの後側とを同時に下方向に移動して足根フレーム12a,12bを持上げることができるから、左右の脚体5a,5bの全長より高く作業機体4を上昇できる。また、前側走行部3a,3bの前側と後側走行部2a,2bの後側とを同時に上方向に移動して前後の接地幅を小さくすることができるから、狭小場所でもUターン又は信地旋回等の方向転換を簡単に実行できる。   As shown in FIGS. 2 to 5, the left and right legs 5a and 5b are composed of front foot frames 9a and 9b that support the front traveling portions 3a and 3b, and rear foot that support the rear traveling portions 2a and 2b. Frames 8a and 8b, and the foot frames 12a and 12b are connected to the front foot frames 9a and 9b via the front foot joint shaft 11, and the rear foot joint shaft 10 is connected to the rear foot frames 8a and 8b. The foot frames 12a and 12b are connected. Therefore, since the angle of attack can be increased by moving the front side of the front side traveling parts 3a, 3b or the rear side of the rear side traveling parts 2a, 2b in the vertical direction, it is possible to easily move a large level difference. Further, since the front side of the front running parts 3a, 3b and the rear side of the rear running parts 2a, 2b can be simultaneously moved downward to lift the foot frames 12a, 12b, the left and right legs 5a, The work machine body 4 can be raised higher than the total length of 5b. Moreover, since the front side of the front traveling units 3a and 3b and the rear side of the rear traveling units 2a and 2b can be simultaneously moved upward to reduce the front and rear contact width, the U-turn or the belief can be reduced even in a narrow place. The direction change such as turning can be executed easily.

図8は本実施形態における材木運搬車1(不整地用走行車両)の油圧回路70を示している。材木運搬車1の油圧回路70は、左右の後側走行部2a,2b及び左右の前側走行部3a,3bの出力可変容量形の各走行駆動油圧モータ35をそれぞれ駆動する走行用油圧ポンプ71と、油圧機器21の各部にチャージ圧油を供給するチャージ用油圧ポンプ72と、左の脚体5aの各油圧シリンダ44a,48a,52a,56a,60aを作動する出力可変容量形の右側脚体用油圧ポンプ73と、右の脚体5bの各油圧シリンダ44b,48b,52b,56b,60bを作動する出力可変容量形の左側脚体用油圧ポンプ74とを備える。走行用油圧ポンプ71と、チャージ用油圧ポンプ72と、右側脚体用油圧ポンプ73と、左側脚体用油圧ポンプ74とは、エンジン20の回転力により作動する。なお、油圧回路70には、リリーフ弁や流量調整弁、チェック弁、オイルクーラ、オイルフィルタ等を備えている。   FIG. 8 shows a hydraulic circuit 70 of the timber transport vehicle 1 (a rough terrain vehicle) according to this embodiment. The hydraulic circuit 70 of the timber transport vehicle 1 includes a traveling hydraulic pump 71 that drives each of the left and right rear traveling units 2a and 2b and the left and right front traveling units 3a and 3b. For the right leg of the output variable capacity type that operates the hydraulic cylinders 44a, 48a, 52a, 56a, 60a of the left leg 5a and the charge hydraulic pump 72 for supplying the charge pressure oil to each part of the hydraulic equipment 21 The hydraulic pump 73 and an output variable displacement left leg hydraulic pump 74 that operates the hydraulic cylinders 44b, 48b, 52b, 56b, 60b of the right leg 5b are provided. The traveling hydraulic pump 71, the charging hydraulic pump 72, the right leg hydraulic pump 73, and the left leg hydraulic pump 74 are operated by the rotational force of the engine 20. The hydraulic circuit 70 includes a relief valve, a flow rate adjustment valve, a check valve, an oil cooler, an oil filter, and the like.

また、右側脚体用油圧ポンプ73には、分流弁75aと、右の股関節制御弁76aとを介して右の股関節油圧シリンダ44aを接続している。右側脚体用油圧ポンプ73には、分流弁77aと、右の膝関節制御弁78aとを介して右の膝関節油圧シリンダ48aを接続している。右側脚体用油圧ポンプ73には、分流弁79aと、右の足首関節制御弁80aとを介して右の足首関節油圧シリンダ52aを接続している。右側脚体用油圧ポンプ73には、分流弁81aと、右のつま先関節制御弁82aとを介して右のつま先関節油圧シリンダ56aを接続している。右側脚体用油圧ポンプ73には、分流弁83aと、右のかかと関節制御弁84aとを介して右のかかと関節油圧シリンダ60aを接続している。右側脚体用油圧ポンプ73には、分流弁85と、ピッチ制御弁86(電磁比例油圧制御弁)とを介してピッチ油圧シリンダ16を接続している。   The right leg hydraulic pump 73 is connected to the right hip joint hydraulic cylinder 44a via a diversion valve 75a and a right hip joint control valve 76a. A right knee joint hydraulic cylinder 48a is connected to the right leg hydraulic pump 73 via a diversion valve 77a and a right knee joint control valve 78a. A right ankle joint hydraulic cylinder 52a is connected to the right leg hydraulic pump 73 via a diversion valve 79a and a right ankle joint control valve 80a. A right toe joint hydraulic cylinder 56a is connected to the right leg hydraulic pump 73 via a diversion valve 81a and a right toe joint control valve 82a. A right heel joint hydraulic cylinder 60a is connected to the right leg hydraulic pump 73 via a diversion valve 83a and a right heel joint control valve 84a. The pitch hydraulic cylinder 16 is connected to the right leg hydraulic pump 73 via a flow dividing valve 85 and a pitch control valve 86 (electromagnetic proportional hydraulic control valve).

また、上述した右側脚体用油圧ポンプ73と同様に、左側脚体用油圧ポンプ74には、分流弁75bと、左の股関節制御弁76bとを介して左の股関節油圧シリンダ44bを接続している。右側脚体用油圧ポンプ73には、分流弁77bと、左の膝関節制御弁78bとを介して左の膝関節油圧シリンダ48bを接続している。右側脚体用油圧ポンプ73には、分流弁79bと、左の足首関節制御弁80bとを介して左の足首関節油圧シリンダ52bを接続している。右側脚体用油圧ポンプ73には、分流弁81bと、左のつま先関節制御弁82bとを介して左のつま先関節油圧シリンダ56bを接続している。右側脚体用油圧ポンプ73には、分流弁83bと、左のかかと関節制御弁84bとを介して左のかかと関節油圧シリンダ60bを接続している。   Similarly to the right leg hydraulic pump 73 described above, the left leg hydraulic pump 74 is connected to the left hip joint hydraulic cylinder 44b via the diversion valve 75b and the left hip joint control valve 76b. Yes. A left knee joint hydraulic cylinder 48b is connected to the right leg hydraulic pump 73 via a diversion valve 77b and a left knee joint control valve 78b. The left ankle joint hydraulic cylinder 52b is connected to the right leg hydraulic pump 73 via a diversion valve 79b and a left ankle joint control valve 80b. A left toe joint hydraulic cylinder 56b is connected to the right leg hydraulic pump 73 via a diversion valve 81b and a left toe joint control valve 82b. A left heel joint hydraulic cylinder 60b is connected to the right leg hydraulic pump 73 via a diversion valve 83b and a left heel joint control valve 84b.

上述した各油圧シリンダ44a,48a,52a,56a,60a,44b,48b,52b,56b,60bには、それらの作動油圧をそれぞれ検出する油圧センサ87を取付けている。なお、上述した各制御弁76a,78a,80a,82a,84a,76b,78b,80b,82b,84bは、電磁式方向流量制御油圧切換弁にて形成し、位置制御及び力制御(インピーダンス制御)によって、各油圧シリンダに供給する作動油の印加方向及び印加流量を制御可能に構成している。   Each of the hydraulic cylinders 44a, 48a, 52a, 56a, 60a, 44b, 48b, 52b, 56b, and 60b is provided with a hydraulic sensor 87 that detects their hydraulic pressures. The control valves 76a, 78a, 80a, 82a, 84a, 76b, 78b, 80b, 82b, 84b described above are formed by electromagnetic directional flow control hydraulic switching valves, and position control and force control (impedance control). Thus, the application direction and flow rate of the hydraulic oil supplied to each hydraulic cylinder can be controlled.

さらに走行用油圧ポンプ71には、左前変速制御弁88aを介して左前走行駆動油圧モータ35を接続する。左前走行駆動油圧モータ35の出力(回転速度)を変更する操向油圧シリンダ89を備える。左前変速制御弁88aに操向制御弁90aを介して操向油圧シリンダ89を接続している。走行用油圧ポンプ71には、右前変速制御弁88bを介して右前走行駆動油圧モータ35を接続する。右前走行駆動油圧モータ35の出力(回転速度)を変更する操向油圧シリンダ89を備える。右前変速制御弁88bに操向制御弁90bを介して操向油圧シリンダ89を接続している。   Further, the left front travel drive hydraulic motor 35 is connected to the travel hydraulic pump 71 via a left front shift control valve 88a. A steering hydraulic cylinder 89 that changes the output (rotational speed) of the left front travel drive hydraulic motor 35 is provided. A steering hydraulic cylinder 89 is connected to the left front shift control valve 88a via a steering control valve 90a. A right front travel drive hydraulic motor 35 is connected to the travel hydraulic pump 71 via a right front shift control valve 88b. A steering hydraulic cylinder 89 that changes the output (rotational speed) of the right front travel drive hydraulic motor 35 is provided. A steering hydraulic cylinder 89 is connected to the right front shift control valve 88b via a steering control valve 90b.

また、走行用油圧ポンプ71には、左後変速制御弁88cを介して左後走行駆動油圧モ
ータ35を接続する。左後走行駆動油圧モータ35の出力(回転速度)を変更する操向油圧シリンダ89を備える。左後変速制御弁88cに操向制御弁90cを介して操向油圧シリンダ89を接続している。走行用油圧ポンプ71には、右後変速制御弁88dを介して右後走行駆動油圧モータ35を接続する。右後走行駆動油圧モータ35の出力(回転速度)を変更する操向油圧シリンダ89を備える。右後変速制御弁88dに操向制御弁90dを介して操向油圧シリンダ89を接続している。各走行駆動油圧モータ35の出力軸の回転速度を検出する左前車速センサ91、右前車速センサ91、左後車速センサ91、右後車速センサ91を備える。
Further, the left rear travel drive hydraulic motor 35 is connected to the travel hydraulic pump 71 via a left rear shift control valve 88c. A steering hydraulic cylinder 89 that changes the output (rotational speed) of the left rear traveling drive hydraulic motor 35 is provided. A steering hydraulic cylinder 89 is connected to the left rear shift control valve 88c via a steering control valve 90c. A right rear traveling drive hydraulic motor 35 is connected to the traveling hydraulic pump 71 via a right rear shift control valve 88d. A steering hydraulic cylinder 89 that changes the output (rotational speed) of the right rear traveling drive hydraulic motor 35 is provided. A steering hydraulic cylinder 89 is connected to the right rear shift control valve 88d via a steering control valve 90d. A left front vehicle speed sensor 91, a right front vehicle speed sensor 91, a left rear vehicle speed sensor 91, and a right rear vehicle speed sensor 91 that detect the rotational speed of the output shaft of each travel drive hydraulic motor 35 are provided.

次に、本実施形態の材木運搬車1の走行制御について説明する。図9は、材木運搬車1の走行制御手段の機能ブロック図であり、マイクロコンピュータ等の走行コントローラ100は、制御プログラムを記憶したROMと各種データを記憶したRAMとを備える。図9に示されるように、走行コントローラ100の入力側には、坐フレーム15の左右方向の傾斜角を検出するロールセンサ101と、坐フレーム15の左右方向の傾斜角速度を検出するロール角速度センサ102と、坐フレーム15の前後方向の傾斜角を検出するピッチセンサ103と、右側脚体5aの縮小(坐フレーム15の右側の下動)リミット位置を検出する左下限センサ104と、左側脚体5bの縮小(坐フレーム15の左側の下動)リミット位置を検出する右下限センサ105と、上述した各油圧センサ87と、オペレータが操作する操縦ハンドル27の切り角(左旋回操作量及び右旋回操作量)を検出する操舵角センサ106と、走行変速レバー28の操作位置(前進操作位置及び後進操作位置)を検出する走行変速センサ107と、上述した各車速センサ91とを接続している。また、操舵角センサ106と、走行変速センサ107とは、遠隔操縦器99からの無線操縦信号を受信するように構成している。   Next, traveling control of the timber transport vehicle 1 of the present embodiment will be described. FIG. 9 is a functional block diagram of the travel control means of the timber transport vehicle 1. The travel controller 100 such as a microcomputer includes a ROM storing a control program and a RAM storing various data. As shown in FIG. 9, on the input side of the travel controller 100, a roll sensor 101 that detects the horizontal tilt angle of the seat frame 15 and a roll angular velocity sensor 102 that detects the horizontal tilt angular velocity of the seat frame 15. A pitch sensor 103 that detects the tilt angle of the seat frame 15 in the front-rear direction, a left lower limit sensor 104 that detects a limit position for reducing the right leg 5a (downward movement on the right side of the seat frame 15), and a left leg 5b. Reduction (downward movement of the left side of the seat frame 15), a lower right limit sensor 105 for detecting a limit position, the hydraulic sensors 87 described above, and a turning angle of the steering handle 27 operated by the operator (a left turn operation amount and a right turn). A steering angle sensor 106 for detecting the operation amount), and a travel shift sensor 1 for detecting the operation position (forward operation position and reverse operation position) of the travel shift lever 28. 7, are connected with each vehicle speed sensor 91 described above. In addition, the steering angle sensor 106 and the traveling speed change sensor 107 are configured to receive a radio control signal from the remote controller 99.

また、図9に示されるように、走行コントローラ100の出力側には、上述した左右の脚体5a,5bの姿勢を制御する各制御弁76a,78a,80a,82a,84a,76b,78b,80b,82b,84bと、坐フレーム15の前後傾きを制御するピッチ制御弁86と、上述した左右の後側走行部2a,2b及び左右の前側走行部3a,3bの各走行駆動油圧モータ35を制御する各制御弁88a,88b,88c,88d,90a,90b,90c,90dとを接続している。   Further, as shown in FIG. 9, on the output side of the travel controller 100, the control valves 76a, 78a, 80a, 82a, 84a, 76b, 78b for controlling the postures of the left and right legs 5a, 5b described above are provided. 80b, 82b, 84b, a pitch control valve 86 for controlling the forward / backward inclination of the seat frame 15, and the above-described travel drive hydraulic motors 35 for the left and right rear travel units 2a, 2b and the left and right front travel units 3a, 3b. The control valves 88a, 88b, 88c, 88d, 90a, 90b, 90c, 90d to be controlled are connected.

上記の構成により、材木運搬車1が前進方向又は後進方向に移動している場合、ロール角速度センサ102の検出結果に基づき、各制御弁76a,78a,80a,82a,84a,76b,78b,80b,82b,84bが作動して、左下限センサ104及び右下限センサ105によって制限される高さ以上で、左右の脚体5a,5bを各別に伸縮させるための制御を開始する。ロールセンサ101の検出結果に基づき、各制御弁76a,78a,80a,82a,84a,76b,78b,80b,82b,84bの作動を中止して、坐フレーム15の左右方向の傾斜を修正する。また、ピッチセンサ103の検出結果に基づき、ピッチ制御弁86を作動して、坐フレーム15の前後方向の傾斜を修正する。   With the above configuration, when the timber transport vehicle 1 is moving in the forward or reverse direction, the control valves 76a, 78a, 80a, 82a, 84a, 76b, 78b, and 80b are based on the detection results of the roll angular velocity sensor 102. , 82b, 84b are activated, and control for expanding and contracting the left and right legs 5a, 5b separately is started at a height that is not less than the height limited by the left lower limit sensor 104 and the right lower limit sensor 105. Based on the detection result of the roll sensor 101, the operation of each control valve 76a, 78a, 80a, 82a, 84a, 76b, 78b, 80b, 82b, 84b is stopped, and the horizontal inclination of the seat frame 15 is corrected. Further, based on the detection result of the pitch sensor 103, the pitch control valve 86 is operated to correct the inclination of the seat frame 15 in the front-rear direction.

その結果、坐フレーム15は、左右の脚体5a,5bを介して略水平に保持される。また、左右の脚体5a,5b(坐フレーム15)を水平制御中、油圧センサ87の検出結果に基づき、各油圧シリンダ44a,48a,52a,56a,60a,44b,48b,52b,56b,60bの駆動速度を制御して、走行部2a,2b,3a,3bから左右の脚体5a,5bに伝達される路面からの衝撃力を吸収する。走行部2a,2b,3a,3bからの衝撃力が、坐フレーム15に伝わるのを防止できる。   As a result, the seat frame 15 is held substantially horizontally via the left and right legs 5a and 5b. Further, during horizontal control of the left and right legs 5a, 5b (seat frame 15), based on the detection result of the hydraulic sensor 87, each hydraulic cylinder 44a, 48a, 52a, 56a, 60a, 44b, 48b, 52b, 56b, 60b. Is controlled to absorb the impact force from the road surface transmitted from the running portions 2a, 2b, 3a, 3b to the left and right legs 5a, 5b. It is possible to prevent the impact force from the traveling parts 2a, 2b, 3a, 3b from being transmitted to the seat frame 15.

また、材木運搬車1外でオペレータが遠隔操縦器99を操作したり、材木運搬車1にオペレータが搭乗して操縦ハンドル27又は走行変速レバー28を操作することによって、材木運搬車1が前進方向又は後進方向に移動している場合、オペレータによって遠隔操縦器99又は操縦ハンドル27又は走行変速レバー28が操作されることによって、操舵角センサ106又は走行変速センサ107の検出結果に基づき、各制御弁88a,88b,88c,88d又は各制御弁90a,90b,90c,90dが作動して、各走行駆動油圧モータ35の駆動油圧又は出力回転速度を制御する。その結果、左右の後側走行部2a,2bの各走行クローラ36及び左右の前側走行部3a,3bの各走行クローラ36が各別に駆動制御され、前進移動又は後進移動又はUターン又はスピンターン(信地旋回)等が実行され、オペレータが希望する方向に希望する速度で移動できる。   In addition, when the operator operates the remote controller 99 outside the timber transport vehicle 1 or the operator gets on the timber transport vehicle 1 and operates the steering handle 27 or the travel shift lever 28, the timber transport vehicle 1 moves forward. Alternatively, when the vehicle is moving in the reverse direction, each control valve is operated based on the detection result of the steering angle sensor 106 or the traveling shift sensor 107 by operating the remote controller 99, the steering handle 27, or the traveling shift lever 28 by the operator. 88a, 88b, 88c, 88d or the control valves 90a, 90b, 90c, 90d are operated to control the drive hydraulic pressure or the output rotational speed of each travel drive hydraulic motor 35. As a result, the traveling crawlers 36 of the left and right rear traveling units 2a, 2b and the traveling crawlers 36 of the left and right front traveling units 3a, 3b are driven and controlled separately to move forward, reverse, U-turn or spin-turn ( And the like, and the operator can move in a desired direction at a desired speed.

次いで、図10乃至図15を参照して、左右の脚体5a,5bの折れ曲り作動を説明する。図10に示されるように、左右の脛フレーム13a,13bの上端側を前方に移動しながら、大腿フレーム14a,14bを機体前方に向けて水平姿勢に移動することによって、坐フレーム15が最前方に移動する。即ち、機体重心が最前方に移動することになる。したがって、急斜面を登る前進走行や、急斜面を下る後進走行のときの機体姿勢が安定する。   Next, the bending operation of the left and right legs 5a and 5b will be described with reference to FIGS. As shown in FIG. 10, the seat frame 15 is moved forward by moving the thigh frames 14a and 14b toward the front of the machine body in a horizontal posture while moving the upper ends of the left and right shin frames 13a and 13b forward. Move to. That is, the center of gravity of the aircraft moves to the forefront. Accordingly, the aircraft posture is stabilized during forward traveling on a steep slope and reverse traveling on a steep slope.

図11に示されるように、左右の脛フレーム13a,13bの上端側を後方に移動しながら、左右の大腿フレーム14a,14bの上端側を後方に移動することによって、坐フレーム15が最後方に移動する。即ち、機体重心が最後方に移動することになる。したがって、急斜面を登る後進走行や、急斜面を下る前進走行のときの機体姿勢が安定する。   As shown in FIG. 11, by moving the upper end sides of the left and right thigh frames 14a and 14b rearward while moving the upper end sides of the left and right tibial frames 13a and 13b rearward, the seat frame 15 is moved rearward. Moving. In other words, the center of gravity of the aircraft moves to the end. Accordingly, the aircraft posture is stabilized when the vehicle is traveling backward on a steep slope or traveling forward on a steep slope.

図12に示されるように、左右の脛フレーム13a,13bを略直立した姿勢に移動しながら、左右の大腿フレーム14a,14bを略直立した姿勢に移動し、後側走行部2a,2bの後端側を下降させ、且つ前側走行部3a,3bの前端側を下降させて、足根フレーム12a,12bの対地高さを高くすることによって、坐フレーム15の対地高さが高くなる。即ち、脛フレーム13a,13bの連結長さと、大腿フレーム14a,14bの連結長さと、足根フレーム12a,12bの対地高さとを加算した高さに、坐フレーム15が上動することになる。したがって、高所作業に必要な坐フレーム15の支持高さ(脚体5a,5bの長さ)、又は坐フレーム15を水上に支持しながら水中を移動するのに必要な坐フレーム15の支持高さ(脚体5a,5bの長さ)等を簡単に確保できる。   As shown in FIG. 12, the left and right thigh frames 13a and 13b are moved to a substantially upright posture while the left and right thigh frames 14a and 14b are moved to a substantially upright posture, and the rear running portions 2a and 2b are The ground height of the seat frame 15 is increased by lowering the end side and lowering the front end side of the front running portions 3a and 3b to increase the ground height of the foot frames 12a and 12b. That is, the seat frame 15 moves up to a height obtained by adding the connection length of the shin frames 13a and 13b, the connection length of the thigh frames 14a and 14b, and the height of the foot frames 12a and 12b to the ground. Therefore, the support height of the seat frame 15 (the length of the legs 5a and 5b) necessary for working at a high place, or the support height of the seat frame 15 required to move underwater while supporting the seat frame 15 on the water. The length (the length of the legs 5a, 5b) can be easily secured.

図13に示されるように、前側走行部3a,3bの前端側を上昇させることによって、前側走行部3a,3bの走行クローラ36の迎え角より大きな路面の進行方向の段差を、前側走行部3a,3bが上り下り移動できる。また、図14に示されるように、後側走行部2a,2bの後端側を下降させることによって、後側走行部2a,2bの走行クローラ36の迎え角より大きな路面の進行方向の段差を、後側走行部2a,2bが上り下り移動できる。   As shown in FIG. 13, by raising the front end side of the front traveling units 3a, 3b, a step in the traveling direction of the road surface that is larger than the angle of attack of the traveling crawler 36 of the front traveling units 3a, 3b is changed to the front traveling unit 3a. , 3b can move up and down. Further, as shown in FIG. 14, by lowering the rear end side of the rear traveling units 2a and 2b, a step in the traveling direction of the road surface that is larger than the angle of attack of the traveling crawler 36 of the rear traveling units 2a and 2b. The rear traveling units 2a and 2b can move up and down.

図15に示されるように、右側の脚体5a(左側の脚体5b)を伸長(縮小)しながら、左側の脚体5b(右側の脚体5a)を縮小(伸長)することによって、右の前側走行部3a及び後側走行部2aを路面の左右方向の段差の低い方に移動させながら、左の前側走行部3b及び後側走行部2bを路面の左右方向の段差の高い方に移動させることができる。即ち、路面の左右方向の段差に追従させて、右の前側走行部3a及び後側走行部2a高さと、左の前側走行部3b及び後側走行部2bの高さとを段違いに異ならせて移動できる。したがって、路肩の土手を跨ぐ走行状態や、山の斜面を横切る走行状態のときに、安定した機体姿勢を維持しながら簡単に移動できる。   As shown in FIG. 15, the right leg 5a (left leg 5b) is expanded (reduced) while the left leg 5b (right leg 5a) is contracted (expanded). The left front side traveling unit 3b and the rear side traveling unit 2b are moved to the higher step in the left and right direction of the road surface while the front traveling unit 3a and the rear side traveling unit 2a are moved to the lower level step in the left and right direction of the road surface. Can be made. That is, the height of the right front traveling unit 3a and the rear traveling unit 2a and the height of the left front traveling unit 3b and the rear traveling unit 2b are made to be different from each other by following the steps in the left and right direction of the road surface. it can. Therefore, the vehicle can be easily moved while maintaining a stable body posture in a traveling state over the bank of the road shoulder or a traveling state across a mountain slope.

図16に示されるように、右側の脚体5a(左側の脚体5b)を前方(後方)に移動しながら、左側の脚体5b(右側の脚体5a)を後方(前方)に移動させ、右の前側走行部3a及び後側走行部2aを先行して移動させながら、左の前側走行部3b及び後側走行部2bを後で遅れて移動させることができる。即ち、右側の脚体5aと左側の脚体5bとを互い違いに前後方向に延長することによって、右の前側走行部3a及び後側走行部2aと、左の前側走行部3b及び後側走行部2bとの前後方向の接地幅を最大に形成できる。したがって、大きな凹部がある路面や、凹凸の激しい路面のときに、路面の凹凸に追従させて、安定した機体姿勢を維持しながら簡単に移動でき、進行方向の幅が大きなくぼ地を簡単に乗り越えることができる。   As shown in FIG. 16, the left leg 5b (right leg 5a) is moved rearward (forward) while the right leg 5a (left leg 5b) is moved forward (rear). While moving the front right traveling unit 3a and the rear traveling unit 2a in advance, the left front traveling unit 3b and the rear traveling unit 2b can be moved later with a delay. That is, the right leg 5a and the left leg 5b are alternately extended in the front-rear direction so that the right front running unit 3a and the rear running unit 2a, the left front running unit 3b, and the rear running unit are extended. The ground contact width in the front-rear direction with 2b can be maximized. Therefore, when the road surface has a large recess, or the road surface is extremely uneven, it can easily move while maintaining a stable body posture by following the unevenness of the road surface. You can get over.

図17に示されるように、左右の後側走行部2a,2bを地上に持上げた状態で、左右の前側走行部3a,3bだけを接地させて移動できる。即ち、走行部2a,2b,3a,3bの前後方向の接地幅を最小に形成できる。したがって、狭小場所で材木運搬車1を簡単に旋回できたり、狭少場所に材木運搬車1を簡単に格納することができる。また、着地場所が狭いトラックの荷台上等に材木運搬車1をコンパクトに搭載して、遠隔地等に簡単に搬送できる。なお、前記と逆に、左右の前側走行部3a,3bを地上に持上げた状態で、左右の後側走行部2a,2bだけを接地させて移動できる。   As shown in FIG. 17, with the left and right rear running units 2a, 2b lifted to the ground, only the left and right front running units 3a, 3b can be grounded and moved. That is, the ground contact width in the front-rear direction of the traveling portions 2a, 2b, 3a, 3b can be formed to a minimum. Therefore, the timber transporter 1 can be easily turned in a narrow place, or the timber transporter 1 can be easily stored in a confined place. In addition, the timber transporter 1 can be compactly mounted on the loading platform of a truck having a small landing place, and can be easily transported to a remote place. Contrary to the above, in the state where the left and right front running units 3a and 3b are lifted to the ground, only the left and right rear running units 2a and 2b can be grounded and moved.

次に、図18を参照して、左右の前側走行部3a,3b及び左右の後側走行部2a,2bの第2実施形態を説明する。図17に示されるように、走行クローラ36に代えて、複数の走行車輪36aを一組として、左右の前側走行部3a,3b及び左右の後側走行部2a,2bに複数の走行車輪36aをそれぞれ配置している。左右の前側走行部3a,3b及び左右の後側走行部2a,2bのトラックフレーム31に各組の複数の走行車輪36aを転動自在に組み付けている。なお、各走行車輪36aは、トラックフレーム31にそれぞれ独立懸架してもよい。また、走行駆動油圧モータ35によって少なくとも一つ又は全部の走行車輪36aを同時に駆動してもよい。   Next, a second embodiment of the left and right front running units 3a and 3b and the left and right rear running units 2a and 2b will be described with reference to FIG. As shown in FIG. 17, instead of the traveling crawler 36, a plurality of traveling wheels 36a are taken as a set, and a plurality of traveling wheels 36a are provided on the left and right front traveling portions 3a, 3b and the left and right rear traveling portions 2a, 2b. Each is arranged. A plurality of traveling wheels 36a of each set are rotatably assembled to the track frames 31 of the left and right front traveling units 3a and 3b and the left and right rear traveling units 2a and 2b. Each traveling wheel 36 a may be independently suspended from the track frame 31. Further, at least one or all of the traveling wheels 36 a may be driven simultaneously by the traveling drive hydraulic motor 35.

上記の記載及び図2乃至図5から明らかなように、左右の前側走行部3a,3bと、左右の後側走行部2a,2bと、駆動源としてのエンジン20及び作業機としての丸太握持アーム22を配置する作業機体4と、前側走行部3a,3b及び後側走行部2a,2bに作業機体4を支持する左右の脚体5a,5bとを備え、左右の脚体5a,5bを屈曲可能に構成してなる不整地用走行車両において、左右の脚体5a,5bの下端側に、左右の前側足関節軸11及び左右の後側足関節軸10を介して、左右の前側走行部3a,3bの後端側及び左右の後側走行部2a,2bの前端側を連結し、左右の前側走行部3a,3bの前端側及び左右の後側走行部2a,2bの後端側が、左右の前側足関節軸11及び左右の後側足関節軸10回りに上下動するように構成したものであるから、左の走行部2b,3b又は右の走行部2a,3aの前後方向の接地幅を変更して、路面抵抗が大きい場所での旋回抵抗を簡単に低減できる。軟弱路面の移動において、走行部2a,2b,3a,3bの前後方向の接地幅を長くして接地圧を低減でき、且つ旋回抵抗が大きくなる場所では、走行部2a,2b,3a,3bの前後方向の接地幅を短くして旋回抵抗を低減でき、不整地での走行性能を向上できる。   As is clear from the above description and FIGS. 2 to 5, the left and right front running units 3a and 3b, the left and right rear running units 2a and 2b, the engine 20 as a driving source, and the log gripping as a working machine. The work machine body 4 on which the arm 22 is arranged, and the left and right legs 5a and 5b are provided with left and right legs 5a and 5b that support the work machine body 4 on the front running parts 3a and 3b and the rear running parts 2a and 2b. In a rough terrain vehicle configured to be bendable, left and right front side travels via left and right front foot joint shafts 11 and left and right rear foot joint shafts 10 on the lower ends of the left and right legs 5a and 5b. Connecting the rear end side of the parts 3a, 3b and the front end side of the left and right rear running parts 2a, 2b, the front end side of the left and right front running parts 3a, 3b and the rear end side of the left and right rear running parts 2a, 2b , Move up and down around left and right front ankle joint axis 11 and left and right rear ankle joint axis 10 Therefore, by changing the ground contact width in the front-rear direction of the left traveling units 2b and 3b or the right traveling units 2a and 3a, it is possible to easily reduce the turning resistance at a place where the road surface resistance is large. . When moving on a soft road surface, the grounding width in the front-rear direction of the traveling parts 2a, 2b, 3a, 3b can be lengthened to reduce the ground pressure, and in places where the turning resistance increases, the traveling parts 2a, 2b, 3a, 3b The ground contact width in the front-rear direction can be shortened to reduce turning resistance, and the running performance on rough terrain can be improved.

上記の記載及び図2乃至図5から明らかなように、左右の前側走行部3a,3bの前端側を左右の前側足関節軸11回りに上下動する左右の前側昇降機構としてのつま先関節油圧シリンダ60a,60bと、左右の後側走行部2a,2bの後端側を左右の後側足関節軸10回りに上下動する左右の後側昇降機構としてのかかと関節油圧シリンダ56a,56bとを備えたものであるから、前後の走行部2a,2b,3a,3bを個別に上下動でき、走行部2a,2b,3a,3bの旋回抵抗を低減しながら、走行部2a,2b,3a,3bの接地圧を簡単に確保できる。   As apparent from the above description and FIGS. 2 to 5, the toe joint hydraulic cylinder as a left and right front lifting mechanism that moves up and down the left and right front running portions 3 a and 3 b around the left and right front foot joint shafts 11. 60a, 60b, and heel joint hydraulic cylinders 56a, 56b as left and right rear raising / lowering mechanisms for moving the rear end sides of the left and right rear running portions 2a, 2b up and down around the left and right rear foot joint shaft 10. Therefore, the front and rear traveling units 2a, 2b, 3a, 3b can be moved up and down individually, and the traveling units 2a, 2b, 3a, 3b can be reduced while reducing the turning resistance of the traveling units 2a, 2b, 3a, 3b. The grounding pressure can be easily secured.

上記の記載及び図2乃至図5から明らかなように、左右の脚体5a,5bは、前記左右の前側走行部3a,3bを支持する左右の前側足フレーム9a,9bと、前記左右の後側走行部2a,2bを支持する左右の後側足フレーム8a,8bとを有し、前記左右の前側足フレーム9a,9bに左右の前側足関節軸11を介して左右の足根フレーム12a,12bを連結し、左右の後側足フレーム8a.8bに左右の後側足関節軸10を介して左右の足根フレーム12a,12bを連結したものであるから、機体重心を前後方向に移動しながら、左右の前側走行部3a,3b又は左右の後側走行部2a,2bの少なくともいずれか一方又は両方の接地圧を簡単に低減できる。左右の前側走行部3a,3b又は左右の後側走行部2a,2bのいずれか一方を地上に持上げた状態で、左右の前側走行部3a,3b又は左右の後側走行部2a,2bのいずれか他方だけを利用して移動することができる。   As is clear from the above description and FIGS. 2 to 5, the left and right legs 5 a and 5 b include left and right front foot frames 9 a and 9 b that support the left and right front running portions 3 a and 3 b, and the left and right rear legs. Left and right rear foot frames 8a and 8b for supporting the side running portions 2a and 2b. The left and right foot frames 12a and 8b are connected to the left and right front foot frames 9a and 9b via the left and right front foot joint shafts 11, respectively. 12b and the left and right rear foot frames 8a. 8b is connected to the left and right foot frames 12a and 12b via the left and right rear foot joint shafts 10, so that the left and right front running parts 3a and 3b or It is possible to easily reduce the ground pressure of at least one or both of the rear traveling units 2a and 2b. Either of the left and right front running units 3a and 3b or the left and right rear running units 2a and 2b in a state where either the left or right front running unit 3a or 3b or the left or right rear running unit 2a or 2b is lifted to the ground. It is possible to move using only the other.

材木運搬車の斜視図である。It is a perspective view of a timber transporter. 材木運搬車1の側面図である。1 is a side view of a timber transport vehicle 1. 同平面図である。It is the same top view. 後側走行部2a,2b及び前側走行部3a,3bの斜視図である。It is a perspective view of rear side travel parts 2a and 2b and front side travel parts 3a and 3b. 脚体5a,5bの側面図である。It is a side view of legs 5a and 5b. 左右の脚体5a,5bを上方から視た斜視図である。It is the perspective view which looked at right and left leg 5a, 5b from the upper part. 左右の脚体5a,5bを下方から視た斜視図である。It is the perspective view which looked at right and left leg 5a, 5b from the lower part. 材木運搬車1(不整地用走行車両)の油圧回路図である。It is a hydraulic circuit diagram of the timber transport vehicle 1 (travel vehicle for rough terrain). 材木運搬車1の走行制御手段の機能ブロック図である。It is a functional block diagram of the travel control means of the timber transporter 1. 機体重心を前方に移動する説明図である。It is explanatory drawing which moves a body gravity center forward. 機体重心を後方に移動する説明図である。It is explanatory drawing which moves back the body gravity center. 機体高さを高くする説明図である。It is explanatory drawing which raises the body height. 路面の大きな段差を上り下りする説明図である。It is explanatory drawing which goes up and down the big level | step difference of a road surface. 路面の大きな段差を上り下りする説明図である。It is explanatory drawing which goes up and down the big level | step difference of a road surface. 左右方向の段差が大きな路面を移動する説明図である。It is explanatory drawing which moves on the road surface with a big level | step difference in the left-right direction. 大きな窪地がある路面を移動する説明図である。It is explanatory drawing which moves the road surface with a big depression. 後側走行部を地上に持上げて移動する説明図である。It is explanatory drawing which lifts and moves a rear side travel part on the ground. 走行部の変形構造を示す説明図である。It is explanatory drawing which shows the deformation | transformation structure of a driving | running | working part.

2a,2b 後側走行部
3a,3b 前側走行部
4 作業機体
5a,5b 脚体
5 足首関節軸
6 膝関節軸
7 股関節軸
8a,8b 後側足フレーム
9a,9b 前側足フレーム
10 後側足関節軸
11 前側足関節軸
12a,12b 足根フレーム
20 エンジン(駆動源)
22 丸太握持アーム(作業機)
56a,56b かかと関節油圧シリンダ(後側昇降機構)
60a,60b つま先関節油圧シリンダ(前側昇降機構)
2a, 2b Rear side running part 3a, 3b Front side running part 4 Work machine body 5a, 5b Leg 5 Ankle joint axis 6 Knee joint axis 7 Hip joint axis 8a, 8b Rear side foot frame 9a, 9b Front side foot frame 10 Rear side foot joint Axis 11 Anterior foot joint axis 12a, 12b Tarsal frame 20 Engine (drive source)
22 Log gripping arm (work machine)
56a, 56b Heel joint hydraulic cylinder (rear lifting mechanism)
60a, 60b toe joint hydraulic cylinder (front lifting mechanism)

Claims (3)

左右の前側走行部と、左右の後側走行部と、駆動源及び作業機を配置する作業機体と、前記前側走行部及び後側走行部に前記作業機体を支持する左右の脚体とを備え、左右の脚体を屈曲可能に構成してなる不整地用走行車両において、
前記左右の脚体の下端側に、左右の前側足関節軸及び左右の後側足関節軸を介して、前記左右の前側走行部の後端側及び前記左右の後側走行部の前端側を連結し、
前記左右の前側走行部の前端側及び前記左右の後側走行部の後端側が、前記左右の前側足関節軸及び前記左右の後側足関節軸回りに上下動するように構成する一方、
前記左右の脚体の上端側に前記作業機体を回動可能に連結する股関節軸を備え、前記股関節軸の軸芯回りに前記作業機体を回動して水平姿勢に維持可能に構成し、
前記作業機体に対して前記左右の脚体の相対連結角度を変更する左右の股関節油圧シリンダと、前記作業機体の前後方向の傾斜角を変更するピッチ油圧シリンダとを備え、
前記左右の股関節油圧シリンダによって前記股関節軸回りに前記左右の脚体を回動可能に構成し、前記ピッチ油圧シリンダによって前記股関節軸回りに前記作業機体を回動可能に構成したことを特徴とする不整地用走行車両。
Left and right front running units, left and right rear running units, a working machine body in which a drive source and a work machine are arranged, and left and right leg bodies that support the work machine body in the front running unit and the rear running unit. , In the rough terrain vehicle configured to bend the left and right legs,
The rear end side of the left and right front running parts and the front end side of the left and right rear running parts are connected to the lower end sides of the left and right leg bodies via left and right front foot joint axes and left and right rear foot joint axes. Concatenate,
The front end side of the left and right front running parts and the rear end side of the left and right rear running parts are configured to move up and down around the left and right front ankle joint axes and the left and right rear ankle joint axes ,
A hip joint shaft that rotatably connects the working machine body to the upper end side of the left and right legs, and configured to be able to rotate the work machine body about the axis of the hip joint shaft and maintain a horizontal posture.
Left and right hip hydraulic cylinders that change the relative connection angle of the left and right legs with respect to the work implement, and a pitch hydraulic cylinder that changes the tilt angle in the front-rear direction of the work implement,
The left and right legs are configured to be rotatable about the hip joint axis by the left and right hip joint hydraulic cylinders, and the work machine body is configured to be rotatable about the hip joint axis by the pitch hydraulic cylinders. Rough terrain vehicle.
前記左右の前側走行部の前端側を前記左右の前側足関節軸回りに上下動する左右の前側昇降機構と、前記左右の後側走行部の後端側を前記左右の後側足関節軸回りに上下動する左右の後側昇降機構とを備えたことを特徴とする請求項1に記載の不整地用走行車両。   Left and right front elevating mechanisms that move the front end side of the left and right front running parts up and down around the left and right front ankle joint axes, and the rear end side of the left and right rear running parts around the left and right rear ankle joint axes The uneven terrain vehicle according to claim 1, further comprising left and right rear lifting mechanisms that move up and down. 前記左右の脚体は、前記左右の前側走行部を支持する左右の前側足フレームと、前記左右の後側走行部を支持する左右の後側足フレームとを有し、前記左右の前側足フレームに前記左右の前側足関節軸を介して左右の足根フレームを連結し、前記左右の後側足フレームに前記左右の後側足関節軸を介して前記左右の足根フレームを連結したことを特徴とする請求項2に記載の不整地用走行車両。   The left and right legs include left and right front foot frames that support the left and right front running portions, and left and right rear foot frames that support the left and right rear running portions, and the left and right front foot frames. The left and right foot frames are connected via the left and right front foot joint axes, and the left and right foot frames are connected to the left and right rear foot frames via the left and right rear foot joint axes. The traveling vehicle for rough terrain according to claim 2, wherein:
JP2007056047A 2007-03-06 2007-03-06 Rough terrain vehicle Expired - Fee Related JP4874838B2 (en)

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