WO2019054165A1 - 作業車両 - Google Patents

作業車両 Download PDF

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Publication number
WO2019054165A1
WO2019054165A1 PCT/JP2018/031632 JP2018031632W WO2019054165A1 WO 2019054165 A1 WO2019054165 A1 WO 2019054165A1 JP 2018031632 W JP2018031632 W JP 2018031632W WO 2019054165 A1 WO2019054165 A1 WO 2019054165A1
Authority
WO
WIPO (PCT)
Prior art keywords
bonnet
cam
arm
posture
lock
Prior art date
Application number
PCT/JP2018/031632
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
優 嶌田
隆 池末
弘信 閑野
義仁 葉山
Original Assignee
ヤンマー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2017176442A external-priority patent/JP6739413B2/ja
Priority claimed from JP2017180259A external-priority patent/JP7094679B2/ja
Priority claimed from JP2017180262A external-priority patent/JP6894334B2/ja
Priority claimed from JP2017180263A external-priority patent/JP6985078B2/ja
Application filed by ヤンマー株式会社 filed Critical ヤンマー株式会社
Priority to KR1020197022698A priority Critical patent/KR102271408B1/ko
Priority to KR1020227003580A priority patent/KR102500122B1/ko
Priority to KR1020217019745A priority patent/KR102359400B1/ko
Priority to EP18855228.5A priority patent/EP3674485B1/en
Priority to BR112020004836-4A priority patent/BR112020004836A2/pt
Publication of WO2019054165A1 publication Critical patent/WO2019054165A1/ja

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/16—Cabins, platforms, or the like, for drivers
    • E02F9/166—Cabins, platforms, or the like, for drivers movable, tiltable or pivoting, e.g. movable seats, dampening arrangements of cabins
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2004—Control mechanisms, e.g. control levers

Definitions

  • the present invention relates to a work vehicle provided with a console box.
  • Patent Document 1 discloses this type of work vehicle.
  • the turning work vehicle disclosed in Patent Document 1 includes a driving operation unit.
  • the driving operation unit is configured such that a lever stand equipped with an operation lever including a work lever and a lock lever is provided rotatably on the side of the driver's seat together with the operation lever.
  • the work lever is connected to a substantially y-shaped connecting arm in a lever stand.
  • the lock lever is rotatably supported in the vertical direction with respect to the connection arm.
  • the driver's seat support frame is provided with a guide plate, which has a substantially reverse S-shaped guide hole.
  • a guide pin projecting from the cam is slidably fitted in the guide hole.
  • the cam rotates integrally with the lock lever.
  • a spring having an urging force in a pulling direction is provided between the cam and the guide plate.
  • the spring biases the lock lever to pivot forward and downward.
  • a biasing member such as a gas damper is interposed between the connecting arm and the driver's seat support frame. The biasing member biases the connecting arm in the downward direction.
  • the work vehicle of Patent Document 2 is configured to bias a lock lever for switching the operation of the operation lever between valid / invalid with a torsion coil spring.
  • the area between the driver's seat and the dashboard is a boarding walk-through area.
  • Lock levers are provided on both sides of the driver's seat for locking and unlocking the bulldozer's control system by pivoting. At position A, where the lock lever crosses the boarding walkthrough area, the bulldozer's control system is unlocked and at position B, the control system is locked.
  • a lever shaft is fixed to the base end of the lock lever, and an intermediate portion of the lever shaft is rotatably supported by a bearing fixed to a frame provided on the vehicle body side. However, this frame does not rotate.
  • An output lever is fixed to the tip of the lever shaft, and a cam pin is provided at the tip of the output lever.
  • a cam plate is rotatably supported by the frame, and a cam groove in which the cam pin engages is provided in the cam plate. The cam plate is connected via a rod to a switching lever of a circuit open / close valve interposed in a pilot circuit of the steering system.
  • a toggle spring consisting of a helical torsion spring is interposed between the output lever of the lock lever and the frame. The toggle spring positions and biases the lock lever to the position A and the position B.
  • biasing of the lock lever is performed by a spring having a biasing force in a pulling direction. Therefore, when such a spring is arranged inside the lever stand, a large space must be secured inside the lever stand in consideration of the deformation of the spring, and the lever stand tends to be large. For example, application to small turning vehicles becomes particularly difficult.
  • Patent Document 2 a torsion coil spring is disposed to connect between the output lever of the lock lever and the frame. Therefore, it is difficult to miniaturize the configuration including the frame, the cam plate, the output lever, and the torsion coil spring, and there is room for improvement in this respect.
  • the present invention has been made in view of the above circumstances, and an object thereof is to realize a compact configuration in which a lock lever is biased in a console box.
  • the console box includes a box body, an operation lever, a lock lever, an urging member, and a lock cam.
  • the box body is rotatable between a first position and a second position flipped up from the first position.
  • the control lever is disposed to protrude from the box body.
  • the lock lever is arranged to protrude from the box body and is rotatable.
  • the biasing member biases the box main body to the second posture side.
  • the lock cam locks the rotation of the box body in both the first attitude and the second attitude.
  • the lock cam includes a guide member and a cam arm. A cam groove is formed in the guide member.
  • the cam arm rotates integrally with the lock lever.
  • the cam arm includes an insertion portion inserted into the cam groove.
  • a torsion coil spring biasing the cam arm is disposed to connect the cam arm and the guide member.
  • the cam arm reverses the direction of rotation by the biasing force of the torsion coil spring while the insertion portion moves along the cam groove.
  • the coil portion of the torsion coil spring is disposed closer to the left and right center of the box body than the guide member.
  • the space inside the box main body can be effectively used by utilizing the torsion coil spring which can realize a large stroke while suppressing the size of the spring itself. As a result, downsizing of the console box is facilitated.
  • the cam arm includes a plate-like arm main body and a central protrusion.
  • the arm body is disposed closer to the left and right center of the box body than the guide member.
  • the central protrusion protrudes from the arm main body to a side closer to the left and right center of the box main body.
  • One end of a spring wire of the torsion coil spring is attached to the guide member, and the other end is attached to the central protrusion.
  • the arm body of the cam arm can be brought close to the guide member, and the space inside the box body can be effectively used, and at the same time, the cam arm can be biased by the space saving torsion coil spring.
  • the coil portion of the torsion coil spring is a position at which the spring wire is attached to the guide member both when the box body is in the first posture and in the second posture. It is preferable to be above.
  • the spring wire extends downward and is connected to the guide member, the coil portion of the torsion coil spring can be less likely to interfere with other components in the box body. As a result, a compact configuration can be realized.
  • the work vehicle includes an operation lever, a control box, and a traveling speed gear switching device.
  • the control levers are respectively disposed on the left and right sides of the driver's seat.
  • the control box is provided to project upward from a floor surface in front of the driver's seat.
  • the traveling speed gear switching device is operated in order for the operator to switch the traveling speed gear.
  • the travel speed gear switching device is provided on the upper portion of the control box.
  • the traveling speed gear switching device at a position where the operator sitting on the driver's seat can visually recognize, the operator can easily confirm the operating state of the high speed gear / low speed gear.
  • the traveling speed gear switching device in the control box in front of the driver's seat, the operator can switch the traveling speed gear with either the left or the right hand, and the degree of freedom of operation can be improved.
  • a display device for displaying an operation state of the traveling speed shift device is disposed in the control box.
  • this work vehicle is provided with a traveling lever disposed in the control box.
  • the traveling speed shift device is disposed at a position shifted from the traveling lever in the left-right direction of the control box.
  • the operator can operate the traveling speed gear switching device with the other hand while operating the traveling lever with one hand. That is, the convenience of both-hand operation can be improved.
  • this work vehicle includes the first and second ports for driving the attachment work machine, and the foot pedal.
  • the foot pedal is used by the operator to operate the attachment work machine with his or her foot.
  • the hydraulic fluid is supplied to the first port, and when the foot pedal is operated to the opposite side, the hydraulic fluid is supplied to the second port.
  • the attachment work machine includes a double acting cylinder
  • the double acting cylinder can be operated by stepping one foot pedal to one side / the other side. Therefore, an intuitive and easy-to-understand operation feeling can be realized.
  • the work vehicle includes a bonnet, a console box, a lock unit, and a safety device.
  • the bonnet is rotatably supported about an axis of rotation disposed at the rear of the engine, covers the engine, and can be opened and closed.
  • the console box has an operation lever operated by an operator, is rotatably supported with respect to the bonnet, and switches from the first posture to the second posture by rotating the bonnet in the same direction as the rotation direction to open It is possible to switch from the second attitude to the first attitude by rotating in the opposite direction.
  • the lock unit enables the operation of the control lever when the console box is in the first posture and the hood is in the closed state, and otherwise disables the operation of the control lever. .
  • the safety device blocks the opening and closing of the hood when the console box is in the first orientation, and allows the opening and closing of the hood when in the second orientation.
  • the bonnet in a state in which the console box is in the second position, and maintenance of the engine and the like can be performed accordingly. Then, when the hood is in the open state or when the console box is in the second posture, the operation of the working machine is invalidated by the lock unit. Therefore, for example, when maintenance is performed on the hydraulic circuit by opening the bonnet while the engine is operating, etc., even if the operation lever is accidentally touched, the operation according to it is prevented from being performed. be able to. Also, the safety device can ensure that the console box is in the second position when opening and closing the bonnet. Therefore, it is possible to reliably prevent the operation of the work vehicle caused by touching the control lever when opening and closing the bonnet.
  • this work vehicle has a driver's seat.
  • the safety device includes a support and a restrictor.
  • the columns are arranged in a pair at intervals in the width direction of the driver's seat.
  • the restriction portion connects the columns to one another.
  • the following configuration is preferable. That is, let a distance between the rotation center of the console box and the tip of the operation lever be a radius, and consider a third virtual circle centered on the rotation center of the console box in a state in which the bonnet is closed. At this time, all of the restricting portions are disposed outside the third virtual circle.
  • the restriction portion does not disturb the switching of the attitude of the console box, and a series of operations for opening and closing the bonnet can be smoothly performed.
  • the restricting portion is formed to be forward as it approaches a connection point from the longitudinal middle portion to the support.
  • the work vehicle includes a bonnet, a first handle, and a second handle.
  • the bonnet is rotatably supported about an axis of rotation located at the rear of the engine, covers the engine, and can be opened and closed.
  • the first handle is disposed on the front of the bonnet.
  • the second handle is disposed on the bonnet at a position higher than the first grip portion.
  • the two handles can be grasped with one hand each and the hood can be opened and closed using both hands. Therefore, opening and closing operations of the bonnet can be performed easily and smoothly. Therefore, even when it is difficult to install an auxiliary device that biases the bonnet in the opening direction, the maintainability of the engine and the like can be improved.
  • the work vehicle includes a driver's seat attached to the top surface of the hood. At least a portion of the second handle is storable in a space formed between the bonnet and the driver's seat.
  • the above-mentioned work vehicle can be configured as follows. That is, the second handle is a flexible elongated strip. Both longitudinal ends of the second handle are attached to the bonnet, and an intermediate portion can be stored in the space.
  • the second handle may be slidably moved, and may be configured to be storable in the space by moving to one side.
  • the second handle can be stored as needed by a simple operation of sliding the second handle.
  • this work vehicle is lockable in a state in which the hood is closed, and includes a lock mechanism capable of releasing the lock by operating the first handle.
  • the lock mechanism is unlocked by an operation force that operates the first handle in a direction to open the bonnet.
  • the bonnet can be released without taking time to release the lock.
  • the elements on larger scale which show the structure of a running speed stage change switch.
  • the conceptual diagram explaining the lock function which invalidates operation with a work operation lever by a solenoid valve The side view explaining switching of the attitude
  • FIG. 1 is a side view showing an overall configuration of a swing working vehicle 1 according to an embodiment of the present invention.
  • the turning work vehicle (work vehicle) 1 shown in FIG. 1 and FIG. 6 is a small-sized backhoe, and mainly includes a lower traveling body 11 and an upper revolving body 12.
  • the lower traveling body 11 includes a crawler traveling device 21 disposed in a pair of right and left, and a hydraulic motor 22 for driving the crawler traveling device 21.
  • the hydraulic motor 22 is provided to each of the left and right crawler traveling devices 21 as shown in FIG.
  • the lower traveling body 11 can drive the left and right crawler traveling devices 21 individually at various directions and speeds, and can perform various travelings such as straight traveling forward or backward and steering.
  • the upper swing body 12 includes a swing frame 31, an engine 33, a hydraulic pump unit 34, a bonnet 38, a control unit 35, and a work device 13.
  • the swing frame 31 is disposed above the lower traveling body 11 and is supported by the lower traveling body 11 so as to be rotatable about a vertical axis.
  • the swing frame 31 can be rotated relative to the lower traveling body 11 by the drive of the swing motor 32.
  • the engine 33 is configured, for example, as a diesel engine, and is disposed at the rear of the swing frame 31.
  • the hydraulic pump unit 34 is driven by the engine 33 and generates hydraulic pressure necessary for traveling and work of the swing working vehicle 1.
  • the bonnet 38 covers and protects the upper surface and the like of the engine 33. As shown in FIG. 10, the rear portion of the bonnet 38 is connected to the pivot frame 31 by hinge portions 245 disposed at the rear portion of the pivot frame 31 as a pair.
  • the bonnet 38 can be rotated with respect to the swing frame 31 about the rotation axis 245 c disposed in the horizontal direction. Specifically, the bonnet 38 can be turned to the open state by rotating it backward and upward, and can be set to the closed state by rotating it in the opposite direction.
  • the control unit 35 includes a driver's seat 39 on which the operator sits, a control box 152 erected in front of the driver's seat 39, and various operation members.
  • traveling operation levers traveling levers
  • 36L and 36R disposed on the left and right pair and supported by the steering box 152
  • work operation levers 65 installed on both the left and right sides of the driver seat 39
  • traveling speed stages A changeover switch traveling speed stage switching device
  • foot pedal foot pedal
  • the work operation lever 65 corresponds to the operation lever.
  • the operator can give various instructions to the swing working vehicle 1 by operating the above-mentioned operation members.
  • the steering box 152 is provided to project upward from the floor surface in front of the driver's seat 39, as shown in FIG. On the upper surface thereof, a traveling speed shift switch 155, traveling operation levers 36L and 36R, and various display devices are disposed.
  • the travel control levers 36L and 36R are arranged on the upper surface of the steering box 152 on the side close to the driver's seat 39 and in the central portion in the left and right direction.
  • the two travel control levers 36L and 36R are disposed close to each other in the left-right direction, and are supported so as to project upward from the upper surface of the steering box 152, respectively.
  • the operator can instruct forward or backward travel of the left and right crawler traveling devices 21 by tilting the left and right traveling operation levers 36L, 36R forward or backward.
  • the traveling speed shift switch 155 is formed of an electric switch, specifically, a rocker switch whose fulcrum shaft is oriented in the left-right direction.
  • the operator can switch the attitude of the switch like a seesaw by pressing the end of the traveling speed shift switch 155.
  • the traveling speed stage changeover switch 155 is in the backward posture, the contact is closed to be in the ON state, and in the forward downward posture, the contact is in the OFF state in which the contact is opened.
  • the operator instructs the high speed gear (second gear) by turning on the travel speed gear switch 155, and instructs the low speed gear (first gear) by turning it off.
  • the power take-off pedal 156 is disposed slightly above the floor in front of the driver's seat 39 and to the left of the steering box 152. An operator steps on the power take-out pedal 156 to operate the attachment work machine (not shown) (for example, an attachment for mowing).
  • the attachment work machine (not shown) (for example, an attachment for mowing).
  • a first port 181 and a second port 182 which supply hydraulic oil for driving the attachment working machine.
  • the first port 181 and the second port 182 are disposed in a boom 41 in the working device 13 described later.
  • the power take-off pedal 156 displaces a direction switching valve provided to the turning work vehicle 1 in order to switch the direction of the hydraulic fluid via a link mechanism (not shown) including an arm and a rod.
  • a direction switching valve provided to the turning work vehicle 1 in order to switch the direction of the hydraulic fluid via a link mechanism (not shown) including an arm and a rod.
  • the details of the direction switching valve will be described later. In this way, hydraulic fluid can be discharged from any one of the first port 181 and the second port 182 in conjunction with the operation of the operator stepping on the power extraction pedal 156 to the front side / rear side.
  • the working device 13 includes a boom 41, an arm 42, a bucket 43, a boom cylinder 44, an arm cylinder 45, and a bucket cylinder 46.
  • Hydraulic cylinders are respectively connected to the boom 41, the arm 42, and the bucket 43, and various operations such as digging by the bucket 43 can be performed by extending and retracting the hydraulic cylinders.
  • the boom 41 is configured as an elongated member, and its end is rotatably supported at the front of the upper swing body 12.
  • a boom cylinder 44 is attached to the boom 41, and the boom 41 can be rotated by expanding and contracting the boom cylinder 44.
  • the arm 42 is configured as an elongated member, the end of which is rotatably supported at the tip of the boom 41.
  • An arm cylinder 45 is attached to the arm 42, and the arm 42 can be rotated by extension and contraction of the arm cylinder 45.
  • the bucket 43 is configured as a container-shaped member, and the end of the bucket 43 is rotatably supported by the tip of the arm 42.
  • a bucket cylinder 46 is attached to the bucket 43, and the bucket cylinder 46 is expanded and contracted to rotate the bucket 43 so that a rake operation / dumping operation can be performed.
  • FIG. 8 is a view schematically showing a hydraulic circuit of the swing working vehicle 1.
  • the hydraulic pump unit 34 is configured to include two variable displacement hydraulic pumps 34a and 34b and an auxiliary hydraulic pump 34c.
  • the swing working vehicle 1 includes a first hydraulic circuit 9a and a second hydraulic circuit 9b. Hydraulic oil is supplied to the first hydraulic circuit 9a from the hydraulic pump 34a on one side, and hydraulic oil is supplied to the second hydraulic circuit 9b from the hydraulic pump 34b on the other side.
  • a hydraulic motor 22L Connected to the first hydraulic circuit 9a is a hydraulic motor 22L for driving the crawler traveling device 21 disposed on the left side of the vehicle body.
  • a direction switching valve 191 is disposed between the hydraulic motor 22L and the discharge port of the hydraulic pump 34a.
  • the attachment cylinder 90 is a double acting cylinder and is connected to the first port 181 and the second port 182 described above.
  • Direction switching valves 192 and 93 are disposed between the discharge port of the hydraulic pump 34b and the hydraulic motor 22R and the attachment cylinder 90, respectively.
  • Each of the pair of travel operation levers 36L and 36R can individually instruct forward, reverse and stop of the left and right crawler travel devices 21.
  • the operator instructs the forward movement by tilting the travel operation levers 36L and 36R to the front side from the neutral position, and instructs the reverse movement by tilting it backward.
  • the swing working vehicle 1 is provided with travel operation lever remote control valves 95L, 95R arranged corresponding to the pair of travel operation levers 36L, 36R.
  • Each travel control lever remote control valve 95L, 95R has two output ports, and the port according to the operation direction (forward / reverse) of travel control lever 36L, 36R, hydraulic oil of pressure according to the operation amount Can send.
  • the pilot pressure output from the travel operation lever remote control valve 95L, 95R is led to the pilot port of the direction switching valve 191, 192 described above.
  • the spools of the directional control valves 191 and 192 are displaced by a direction and an amount according to the traveling direction and traveling speed instructed by the traveling operation levers 36L and 36R, whereby the hydraulic motors 22L and 22R are instructed by the operator. It can be rotated in the direction and speed based on.
  • the spool of the direction switching valve 93 is connected to the power take-off pedal 156 via the above-described link mechanism. Therefore, the spool of the directional control valve 93 is displaced by a direction and an amount according to the direction and the operation amount instructed by the power take-out pedal 156, whereby the attachment cylinder 90 is in the direction and the amount based on the operator's instruction. It can be operated.
  • the hydraulic pump unit 34 includes an auxiliary hydraulic pump 34c for adjusting the output of the hydraulic motor 22 in addition to the above-described hydraulic pumps 34a and 34b.
  • the auxiliary hydraulic pump 34c can supply hydraulic fluid to a swash plate drive mechanism for adjusting the angle of the movable swash plate of each of the hydraulic motors 22L, 22R.
  • a solenoid valve 194 for switching the supply / shutoff of hydraulic fluid is disposed.
  • the solenoid valve 194 is electrically connected to the traveling speed shift switch 155. When the operator operates the traveling speed shift switch 155 to turn it on, the solenoid valve 194 is opened, and when it is turned off, the solenoid valve 194 is closed.
  • the traveling speed change switch 155 When the traveling speed change switch 155 is turned on, the solenoid valve 194 is opened, so the hydraulic oil from the auxiliary hydraulic pump 34c is sent to the swash plate drive mechanism. As a result, the inclination angle of the movable swash plate in the hydraulic motor 22 is reduced, and the hydraulic motor 22 is driven at a speed corresponding to the second speed.
  • FIG. 9 is a partially enlarged view showing the configuration of the traveling speed shift switch 155. As shown in FIG.
  • the traveling speed shift switch 155 is disposed to the left of the traveling operation lever 36L in the width direction of the steering box 152 (the left and right direction of the vehicle body). That is, in the lateral width direction of the steering box 152, the travel operation levers 36L and 36R and the travel speed shift switch 155 are disposed at mutually shifted positions. Thus, it is possible for the operator to operate the traveling speed shift switch 155 with the left hand while operating the travel operation levers 36L and 36R with the right hand. Note that the traveling speed shift switch 155 may be disposed to the right of the traveling operation lever 36R.
  • the traveling speed shift switch 155 is disposed on the left side of the upper surface of the steering box 152 and slightly closer to the center. As a result, the traveling speed shift switch 155 can be easily operated by either the left or right hand of the operator.
  • an ON mark is displayed on the rear side, and an OFF mark is displayed on the front side, on the upper surface (front surface) of the traveling speed shift switch 155.
  • a light transmission portion 157 is provided on the surface corresponding to the ON state on the surface of the traveling speed shift switch 155.
  • a lamp (display device) 58 is provided inside the traveling speed shift switch 155 at a position corresponding to the light transmitting portion 157.
  • the lamp 58 can be configured to light up, for example, when the traveling speed shift switch 155 is in the ON state. As a result, the operator can easily check the ON / OFF state of the traveling speed stage changeover switch 155 even in a dark environment (for example, at night).
  • a small picture (icon) indicating high speed is drawn at the position of the light transmitting portion 157 on the upper surface of the traveling speed shift switch 155.
  • the correspondence between the posture of the traveling speed shift switch 155 and the traveling speed can be shown to the operator in an easy-to-understand manner.
  • the icon is lighted up in the lighting state of the lamp 58, the operator can more easily confirm the ON / OFF state of the traveling speed stage changeover switch 155.
  • switching of the speed stage is performed by the traveling speed stage switching switch 155, so that it is not necessary to assign the switching operation of the speed stage to the power extraction pedal 156. Therefore, when the attachment work machine using a double acting hydraulic actuator is mounted on the turning work vehicle 1 by the combination of the traveling speed shift switch 155 and the power extraction pedal 156, the power extraction pedal 156 is stepped forward. For example, if the attachment work machine is driven to one side and stepped to the other side, a simple operation driven to the other side can be realized.
  • a driver's seat 39 for the operator to be seated is disposed at the left and right center of the upper surface of the upper swing body 12.
  • the driver's seat 39 is drawn by a chain line in order to clearly show the belt 372 and the like described later.
  • the console box 52 is arrange
  • the driver's seat 39 and the console box 52 are disposed on the upper surface of the bonnet 38 provided in the upper swing body 12.
  • the console box 52 includes a box main body 55, the above-described operation control lever 65, a lock lever 56, and an arm rest 57.
  • the console box 52 supports the work control lever 65 and the lock lever 56 described above.
  • the box body 55 is hollow and covers and protects various mechanisms (for example, a lock cam 79, a pilot valve 77, an electric switch 94, etc. described later) disposed inside.
  • various mechanisms for example, a lock cam 79, a pilot valve 77, an electric switch 94, etc. described later
  • a pilot valve 77 is disposed inside the box body 55. As shown in FIG. 10, in each of the left and right console boxes 52, a pilot valve 77 is disposed inside the box body 55. As shown in FIG. 11, the left and right pilot valves 77 each have one input port and four output ports.
  • the discharge port of the hydraulic pump provided in the above-described hydraulic pump unit 34 is connected to the input port of the pilot valve 77 via a pipe (not shown).
  • a solenoid valve (lock portion) 264 provided in the swing working vehicle 1 is disposed in the path of the hydraulic fluid connecting the hydraulic pump and the pilot valve 77.
  • a relief valve for releasing pressure is disposed between the hydraulic pump of the hydraulic pump unit 34 and the solenoid valve 264.
  • the output port of the pilot valve 77 is connected to the control valve 284 with which the revolving task vehicle 1 is equipped, via a piping (not shown).
  • the pilot valve 77 opens and closes between the input port and each output port in response to the operator operating the operation control lever 65 back and forth and right and left.
  • hydraulic fluid is sent from the pilot valve 77 to the control valve 284.
  • the control valve 284 is provided with a plurality of spools for switching driving / stopping of the hydraulic actuator provided in the working device 13 etc., as conceptually shown in FIG.
  • the control valve 284 moves the hydraulic actuator by displacing the spool using the hydraulic oil sent from the pilot valve 77 as a pilot pressure to move the hydraulic actuator and perform various operations using the working device 13 and the swing of the upper swing body 12. be able to.
  • the box body 55 can be rotated via a support shaft 69 disposed in the left-right direction with respect to a base member 60 described later fixed to the upper surface of the bonnet 38. It is supported.
  • the lock lever 56 By suitably operating the lock lever 56 by the operator, the attitude of the console box 52 can be switched between a first attitude P1 shown by a solid line in FIGS. 2 and 12 and a second attitude P2 shown by a dashed line. .
  • the first attitude P1 of the console box 52 is a substantially horizontal attitude, which is a normal attitude when the operator operates the work operation lever 65.
  • the second posture P2 is a posture in which the first posture P1 is flipped back to the rear, and is used, for example, to temporarily retract the console box 52 rearward and upward when the operator gets on and off the turning working vehicle 1.
  • Be The rotation direction for switching the console box 52 from the first posture P1 to the second posture P2 is the same as the rotation direction for opening the hood 38 in the closed state.
  • the console box 52 is provided with a cam mechanism described later, and in any of the first posture P1 and the second posture P2 described above, the rotation is restricted so that the console box 52 does not rotate unexpectedly with respect to the bonnet 38 from that posture. can do.
  • this cam mechanism for example, any cam such as a groove cam can be used.
  • the work control lever 65 and the lock lever 56 are arranged to project from the box body 55.
  • the work control lever 65 is disposed on the top of the console box 52 and protrudes obliquely upward and forward. The operator can operate the work operation lever 65 to give an instruction on the operation of the work device 13 or the swing of the upper swing body 12.
  • the lock lever 56 is disposed at the lower front of the console box 52 and protrudes obliquely upward and forward.
  • the lock lever 56 is operated to switch the attitude of the console box 52.
  • the lock lever 56 is supported by the box main body 55 so as to be rotatable about an axis in the horizontal direction.
  • the operator rotates the lock lever 56 to release the restriction of the rotation by the cam mechanism, and the box main body 55 is put between the first posture P1 and the second posture P2 (in other words, the console box 52). ) Can be rotated.
  • the hydraulic circuit provided in the swing working vehicle 1 is provided with a lock function that invalidates the operation of the work operation lever 65 when the console box 52 is in the second posture P2.
  • This lock function shuts off the supply of hydraulic oil when, for example, the second attitude P2 of the console box 52 is detected by a sensor or the like with respect to the pilot valve 77 that opens and closes in response to the operation of the work operation lever 65. It can be realized by controlling.
  • the operator who gets on the revolving task vehicle 1 operates the work operation lever 65 with the console box 52 in the first posture P1.
  • the console box 52 can be retracted so as not to interfere with the body of the operator by setting the console box 52 to the second posture P2.
  • the left and right console boxes 52 have symmetrical configurations, and the configurations are substantially the same. Therefore, the console box 52 on the left side as viewed from the operator sitting on the driver's seat 39 will be described below as a representative.
  • FIG. 3 is a perspective view of the console box 52 in the first posture P1 as viewed from the side
  • FIG. 4 is a perspective view as viewed from the rear
  • FIG. 5 is a perspective view of the console box 52 in the second posture P2 as viewed from the side.
  • the box body 55 is drawn in phantom with a dashed line.
  • the console box 52 mainly has a base member 60, a support shaft 69, a main arm 70, a first reinforcing member 71, and a second reinforcing member 72, in addition to the above configuration.
  • a mounting plate 75, a cam arm shaft 80, a cam arm 81, and a torsion coil spring 86 are provided.
  • the base member 60 is formed as a member obtained by bending a plate-like member into a substantially U-shape in a rear view.
  • the base member 60 has a width in the lateral direction, and the front and upper portions of the internal space are open.
  • the inside in the left-right direction means the side near the center (center in the left-right direction) that divides the width of the base member 60 into two equal parts. It means the side far from the center.
  • the widthwise center of the base member 60 substantially coincides with the widthwise center of the box body 55.
  • the base member 60 includes a bottom plate 64, a first plate (guide member) 66, and a second plate 67.
  • the bottom plate 64 is fixed to the upper surface of the bonnet 38 shown in FIG. 1 by a bolt which is a fastening member.
  • the first plate 66 is formed to vertically rise from the left and right ends of the bottom plate 64.
  • a cam groove 88 is formed in the first plate 66, the details of which will be described later.
  • the second plate 67 is formed so as to vertically rise from the other end of the bottom plate 64. The upper end portion of the second plate 67 is lower than the height of the first plate 66.
  • a rear plate 63 is fixed to the rear of the base member 60.
  • the first support plate 61 is fixed to the back plate 63.
  • the first support plate 61 is disposed above the second plate 67, and faces the first plate 66 in the left-right direction.
  • a support shaft 69 is rotatably supported between the first plate 66 and the first support plate 61.
  • the support shaft 69 is an elongated cylindrical member, and is disposed with its longitudinal direction oriented in the left-right direction.
  • the support shaft 69 serves as a rotation shaft of the box main body 55 described above (and the console rotation body described later).
  • the main arm 70 is fixed to the end of the support shaft 69 on the side far from the first plate 66.
  • the main arm 70 is formed as a substantially V-shaped plate member in a side view.
  • a first reinforcing member 71 for fixing the rigidity is fixed on a surface of the main arm 70 facing the first plate 66.
  • the arm rest 57 described above is attached to the first reinforcing member 71.
  • the main arm 70 and the aforementioned second plate 67 are connected by a gas damper 74 as a biasing member.
  • the gas damper 74 exerts a biasing force in the extending direction on the main arm 70. Therefore, a biasing force that causes the main arm 70 to rotate upward about the support shaft 69 acts on the main arm 70.
  • a mount plate 75 is fixed to upper end portions of the main arm 70 and the first reinforcing member 71. As shown in FIG. 3, a pilot valve 77 is fixed to the mounting plate 75. Above the pilot valve 77, the above-mentioned operation control lever 65 is disposed.
  • the pivoting work vehicle 1 is provided with a control valve 284 that switches the supply of hydraulic fluid to various actuators for traveling and work.
  • the pilot valve 77 is connected to the control valve 284 via a flexible piping (not shown).
  • the pilot valve 77 controls the pilot hydraulic pressure for the control valve 284 in response to the operator operating the work operation lever 65 in the front-rear direction and the left-right direction. Thereby, for example, the swing of the upper swing body 12, the scoop operation of the bucket 43, and the like can be performed.
  • the second reinforcing member 72 is fixed so as to connect the mounting plate 75 and the main arm 70.
  • the second support plate 62 is fixed to the second reinforcing member 72, and the second support plate 62 is disposed at a position facing the main arm 70 in the left-right direction. Also, the second support plate 62 is disposed in front of the first plate 66.
  • a support rod 95 is fixed to the first reinforcing member 71.
  • the support rod 95 is appropriately bent so as to turn over from the upper side in the left-right direction of the first plate 66 in the first posture P1 described above, and a cylindrical attachment boss 98 formed with a female screw is fixed at its tip .
  • the above mounting bosses 98 are similarly fixed to two places of the main arm 70 and one place of the second support plate 62.
  • the mounting bosses 98 are all arranged to protrude outward in the left-right direction, and a box body 55 made of synthetic resin is fixed to each mounting boss 98 by a bolt as a fastening member.
  • the box body 55 is configured to be divided into upper and lower parts, and is fixed to the mounting boss 98 by the bolt in a state of being coupled to each other.
  • An opening for projecting the base member 60 is formed on the lower surface of the box body 55.
  • the box main body 55 is appropriately formed with openings for causing the work operation lever 65, the lock lever 56, and the arm rest 57 to protrude to the outside.
  • a cam arm shaft 80 is rotatably supported between the front portion of the main arm 70 and the second support plate 62.
  • the cam arm shaft 80 is an elongated cylindrical member, and is disposed with its longitudinal direction oriented in the left-right direction.
  • the cam arm shaft 80 is located forward of the base member 60.
  • the above-mentioned lock lever 56 is fixed to the cam arm shaft 80.
  • the lock lever 56 is formed in a curved shape, and its tip is directed obliquely upward in the above-described first posture P1.
  • a cam arm 81 is fixed to an end of the cam arm shaft 80 closer to the first plate 66.
  • the cam arm 81 includes an arm body 82, a guide protrusion (insertion portion) 83, and a spring receiving member (central side protrusion) 84.
  • the arm body 82 is configured as an elongated plate-like member. In the above-described first posture P1, the arm body 82 extends generally rearward from the cam arm shaft 80, and the tip thereof is inserted into the internal space of the base member 60.
  • the arm main body 82 is disposed to be close to the first plate 66 at the inner side in the left-right direction of the first plate 66.
  • the thickness direction of the plate of the arm main body 82 coincides with the thickness direction of the first plate 66.
  • the guide protrusion 83 is fixed to the tip of the arm body 82 and protrudes outward in the left-right direction.
  • a cam groove 88 is formed in the first plate 66 in a penetrating manner, and a guide projection 83 is inserted into the cam groove 88.
  • the cam groove 88 can guide the tip of the cam arm 81.
  • a lock cam 79 is constituted by the cam arm 81 and the first plate 66 described above.
  • the lock cam 79 can lock the rotation of the box body 55 (in other words, the console rotation body described later) in both the first attitude P1 and the second attitude P2.
  • a protrusion 85 extending substantially perpendicularly to the longitudinal direction of the arm body 82 is integrally formed at a longitudinally intermediate portion of the arm body 82.
  • the spring receiving member 84 is fixed to the projection 85.
  • the spring receiving member 84 is a small member, and is disposed so as to protrude inward in the left-right direction from the arm body 82 (that is, on the side opposite to the direction in which the guide projection 83 protrudes from the arm body 82).
  • a torsion coil spring 86 is disposed so as to connect between an appropriate position of the first plate 66 and the spring receiving member 84.
  • the torsion coil spring 86 is disposed such that the axis of the coil portion around which the spring wire is wound is directed in the left-right direction.
  • One end of the spring wire of the torsion coil spring 86 is directed outward in the left-right direction, and is inserted into a small hole formed in the first plate 66.
  • the other end of the spring wire is directed inward in the left-right direction, and is inserted into a small hole formed in the spring receiving member 84.
  • the cam groove 88 has a substantially constant width, and is formed so as to be smoothly curved in a substantially S-shape.
  • the side of the cam groove 88 that is far from the cam arm shaft 80 is curved so as to be convex downward, and the end thereof is substantially upward.
  • a portion in the vicinity of the end portion is the first lock portion 91 of the cam groove 88.
  • the end of the cam groove 88 on the side close to the cam arm shaft 80 is bent substantially at a right angle to be substantially upward.
  • the bent portion is the second lock portion 92 of the cam groove 88.
  • An electric switch 94 is attached to the second reinforcing member 72.
  • the electrical switch 94 comprises a contact which is pushed by the arm body 82 in the position of the cam arm 81 shown in FIG. On the other hand, when the cam arm 81 rotates clockwise from the state shown in FIG. 3, the above-mentioned pushing is released. Thus, the electrical switch 94 functions as a sensor that detects the rotation of the cam arm 81.
  • the console box 52 of this embodiment is configured as described above, it can be understood as a configuration in which the console rotating body is rotatably supported on the base body.
  • the base body includes a base member 60, a back plate 63, and the like.
  • the console rotation body includes a work operation lever 65, a box main body 55, a lock lever 56, an arm rest 57, a main arm 70, a first reinforcing member 71, a second reinforcing member 72, a mount plate 75, a second support plate 62 and the like. included.
  • the change of the attitude of the box main body 55 has substantially the same meaning as the change of the attitude of the console rotation body.
  • FIG. 3 shows that the box body 55 is in the first posture P1.
  • the guide projection 83 located at the tip of the cam arm 81 is in the first lock portion 91 of the cam groove 88.
  • the torsion coil spring 86 generates a spring force in the direction of expanding both ends of the spring wire, and in the state of FIG. 3, this spring force acts in the direction to rotate the cam arm 81 counterclockwise. Accordingly, the cam arm 81 is held with the guide projection 83 in the first lock portion 91.
  • the fulcrum crossing occurs in relation to 80.
  • the spring force of the torsion coil spring 86 acts to rotate the cam arm 81 clockwise. Therefore, the guide projection 83 of the cam arm 81 passes the curved portion which is downwardly convex in the cam groove 88 along with the pulling-up of the console rotating body by the biasing force of the gas damper 74 and moves toward the second lock portion 92. To move.
  • the biasing force of the gas damper 74 continues to act, and the console rotor rotates about the pivot 69.
  • the biasing of the console rotating body is performed by the gas damper 74, it is possible to suppress the change in the biasing force over the entire rotation stroke of the console rotating body.
  • the operator can rotate the console rotation body such that the box body 55 changes from the first posture P1 to the second posture P2 by obtaining a stable assisting force.
  • at least an intermediate portion of the cam groove 88 is formed in a smooth curved line, the movement of the cam arm 81 and the like is smooth, and the attitude of the console rotation body can be smoothly changed.
  • the above-mentioned fulcrum crossing occurs at an appropriate timing after the guide projection 83 moving along the cam groove 88 passes the lower end position of the curved portion which is convex downward, and the spring force of the torsion coil spring 86 is
  • the cam arm 81 acts in a counterclockwise direction.
  • the guide projection 83 moves to the first lock portion 91.
  • the box body 55 can be returned to the first posture P1 and locked again. Further, since the contact of the electric switch 94 is pushed by the cam arm 81 by the counterclockwise rotation of the cam arm 81, the operation of the work operation lever 65 is validated.
  • the lock lever 56 is biased by a torsion coil spring 86 instead of a tension spring or the like. Therefore, since a biasing force can be obtained without large deformation of the coil portion, a compact configuration of the console box 52 can be easily realized.
  • a plurality of pipes connected to the pilot valve 77 are disposed in a space located closer to the left and right center of the console box 52 than the first plate 66.
  • a margin for allowing the deformation must be secured around the pipe.
  • a space for moving the cam arm 81 must be secured around the cam arm 81 on the left and right center side of the console box 52 than the first plate 66.
  • the configuration using the torsion coil spring 86 as in the present embodiment is particularly effective when it is difficult to secure a space closer to the left and right center of the box body 55 than the first plate 66.
  • this configuration is suitable in the case where the lateral width of the console box 52 can not be increased in a small swing work vehicle in which the swing radius of the upper swing body 12 is limited.
  • the coil part which the torsion coil spring 86 has is arrange
  • the coil portion of the torsion coil spring 86 is arranged to fit within the width in the left-right direction between the first plate 66 and the spring receiving member 84.
  • the center of this coil portion is oriented substantially parallel to the axis of the cam arm shaft 80.
  • a member such as a guide shaft is not inserted into the inside of the coil portion. Thereby, the freedom degree of the position of the both ends of a spring wire can be increased.
  • the spring wire extends substantially upward from the connection point with the first support plate 61 and is connected to the coil portion.
  • the spring wire also extends substantially upward from the connection point with the spring receiving member 84 and is connected to the coil portion.
  • the coil portion is disposed on the upper side of the arm body 82.
  • the torsion coil spring 86 connects the first plate 66 and the spring receiving member 84 so as to substantially bypass the upper side of the arm body 82.
  • the spring wire of the torsion coil spring 86 extends obliquely upward from the connection portion with the first support plate 61 and is connected to the coil portion There is.
  • the coil portion is above the position at which the spring wire is attached to the first support plate 61. Therefore, the spring wire extends downward and is connected to the first support plate 61, so that the coil portion and other members (for example, the arm body 82 and the above-mentioned piping etc. not shown) are less likely to interfere with each other. Placement can be realized.
  • the swing working vehicle 1 of the present embodiment is provided with a bonnet switch 275.
  • the bonnet switch 275 is attached to the pivot frame 31 at an appropriate position.
  • the bonnet switch 275 has a contact, and in the closed state of the bonnet 38, the small actuating member fixed to the inner wall of the bonnet 38 is arranged so that the contact is pushed.
  • the bonnet switch 275 is configured such that the contact is closed when the contact is pushed in, and the contact is opened when the contact is not pushed. Thereby, the bonnet switch 275 can detect the open / close state of the bonnet.
  • the bonnet switch 275 outputs the detection result on the opening and closing of the bonnet 38 to the solenoid valve 264.
  • the electric switch 94 is attached at an appropriate position inside the box main body 55 provided in each of the left and right console boxes 52.
  • Each electric switch 94 has a contact, and when the console box 52 is in the above-mentioned first posture P1, the contact is arranged to be pushed by an appropriate member (for example, the above-mentioned cam arm 81).
  • the electric switch 94 is configured such that the contact is closed when the contact is pushed in, and the contact is opened when the contact is not pushed. Thereby, the electric switch 94 can detect the attitude of the console box 52.
  • Each of the left and right electric switches 94 is electrically connected to the solenoid valve 264, and outputs a detection result regarding the attitude of the console box 52 to the solenoid valve 264.
  • the solenoid valve 264 is in the open state when the contacts of all the left and right electric switches 94 and the bonnet switch 275 are closed. On the other hand, when at least one of the left and right electric switches 94 and the bonnet switch 275 is open, the valve is closed.
  • the solenoid valve 264 supplies hydraulic fluid to the pilot valve 77 to operate the operation control lever 65.
  • the operation of the work device 13 or the like is validated.
  • the supply of hydraulic fluid to the pilot valve 77 is shut off, and the operation of the work device 13 or the like by the work operation lever 65 is invalidated.
  • a safety frame (safety device) 266 for fixing a space around the operator when the turning work vehicle 1 falls over is fixed to the rear of the turning frame 31.
  • the safety frame 266 is drawn in phantom with a dashed line.
  • the safety frame 266 is configured in a two-post type, and has an inverted U shape in front view.
  • the safety frame 266 includes two columns 270, a first connecting portion 271, and a second connecting portion (regulating portion) 272.
  • Each of the columns 270 is configured as a member that is elongated in a substantially vertical direction, and is disposed on the upper swing body 12 in a left-right pair.
  • the lower portion of each support 270 is fixed to the rear side of the engine 33 and to the left and right diagonally rear portions of the turning frame 31.
  • the two columns 270 are arranged to be sufficiently spaced apart from each other in the left-right direction of the upper swing body 12. Therefore, the support column 270 does not disturb the opening and closing of the bonnet 38 and the posture switching of the console box 52.
  • the first connecting portion 271 is configured as an elongated member in the left-right direction.
  • the first connecting portion 271 is integrally formed with the support column 270 so as to connect the upper ends of the left and right support columns 270.
  • the second connection portion 272 is configured as a member elongated in a generally left-right direction.
  • the second connection portion 272 is arranged to connect the left and right columns 270 at a position lower than the first connection portion 271.
  • the second connection portion 272 has a bent portion so as to be forward from the longitudinal middle portion to both end portions (that is, connection points to the support 270).
  • the distance between the rotation shaft 245c of the bonnet 38 and the tip of the work operation lever 65 in the first posture P1 is a radius
  • a first virtual circle C1 centered on the rotation shaft 245c is considered.
  • a second virtual circle C2 centered on the rotation axis 245c is considered, where the distance between the rotation axis 245c and the tip of the operation control lever 65 in the second posture P2 is a radius.
  • the second connecting portion 272 is disposed inside the first virtual circle C1 and outside the second virtual circle C2.
  • the distance between the support shaft 69, which is the rotation center of the console box 52, and the tip of the operation control lever 65 is a radius, and the support shaft 69 in the closed state of the bonnet 38 is centered.
  • the second connection portion 272 is disposed outside the third virtual circle C3.
  • the second connecting portion 272 (specifically, a portion indicated by hatching in FIG. 12) as described above, the following effects can be obtained. That is, in the state where the console box 52 is in the first posture P1, even if the hood 38 is to be rotated, the work operation lever 65 interferes with the second connecting portion 272, so the hood 38 can not be opened. However, in the state where the hood 38 is closed, the console box 52 can be switched from the first posture P1 to the second posture P2. Then, if the console box 52 is switched to the second posture P2, when the bonnet 38 is rotated in this state, the upper end of the work operation lever 65 passes near the rotation shaft 245c of the bonnet 38 more than the second connecting portion 272. In order to do so, the bonnet 38 can be opened as shown by the chain line in FIG.
  • the operation of opening the hood 38 in the closed state will be described.
  • the operator performs an operation of switching the console box 52 from the first posture P1 to the second posture P2 by operating the lock lever 56 for each of the left and right console boxes 52.
  • the operator places a hand on an appropriate part of the bonnet 38 and rotates it backward and upward.
  • the bonnet 38 rotates in a front-opened manner to the position shown by the chain line in FIG. Thereby, the inside of the hood 38 (for example, the engine 33) can be easily accessed.
  • the work operation lever 65 interferes with the second connecting portion 272 even if the bonnet 38 is opened, so it can not be opened. Therefore, it is possible to urge work in the correct procedure of opening the hood 38 after setting the left and right console boxes 52 in the second posture P2.
  • the operation control lever 65 may hit the second connecting portion 272 and the pilot valve 77 may operate.
  • the bonnet switch 275 detects the open state of the bonnet 38 and opens the contact at the initial stage of the stroke for rotating the bonnet 38 to open, the solenoid valve 264 is closed at this time. It is replacing.
  • the operation of the work operation lever 65 is invalidated before the work operation lever 65 hits the second connection portion 272, it is possible to prevent the work device 13 and the like from moving.
  • the work of closing the hood 38 in the open state may be performed reverse to the above.
  • the operator first closes the hood 38, but the console box 52 is in the second posture P2 over the entire stroke for rotating the hood 38 for this purpose, so that the work device 13 moves even if the work operation lever 65 is touched. There is nothing to lose.
  • the hood switch 275 detects the closed state of the hood 38 and closes the contact.
  • the operator switches the left and right console boxes 52 from the second posture P2 to the first posture P1.
  • the left and right electric switches 94 detect the first posture P1 and close the contacts.
  • the operation of the work operation lever 65 is activated by the solenoid valve 264.
  • the operation of the work operation lever 65 is invalidated even when the bonnet 38 is open and the engine 33 is in operation, so the upper swing body 12 Does not turn or the working device 13 operates. Therefore, maintenance work can be performed with confidence.
  • the bonnet 38 can not be opened and closed by the second connecting portion 272 of the safety frame 266 unless the console box 52 is in the second posture P2. Therefore, it is possible to make the operator surely follow the procedure for opening and closing the hood 38.
  • connection portion 272 has a shape bent toward the front as it approaches the connection point (that is, the left and right ends) from the longitudinal middle portion to the support 270. Therefore, the arrangement of the second connecting portion 272 can be realized such that the operator sitting on the driver's seat 39 does not get cramped, so that the comfortability can be secured.
  • FIG. 14 is a perspective view of the lock release handle 371 and the belt 372 of the first embodiment as viewed from the front side.
  • the bonnet 38 is provided with a lock mechanism 380 capable of holding the bonnet 38 in a closed state.
  • the lock mechanism 380 includes a lock release handle (first handle) 371 disposed at the lower front of the bonnet 38.
  • the lock mechanism 380 includes a support boss 385, a hook plate 386, and a torsion coil spring 387 in addition to the lock release handle 371 described above.
  • left and right mean left and right as viewed from the operator sitting in the driver's seat.
  • the support boss 385 is a cylindrical member and is fixed to the inner wall of the bonnet 38 via a bracket 388.
  • the shaft hole of the support boss 385 is directed substantially in the front-rear direction, and the root portion of the lock release handle 371 bent in an L shape is rotatably supported by the shaft hole.
  • the lock release handle 371 protrudes forward from the support boss 385 and bends approximately 90 ° to the left after passing through a through hole (not shown) formed in the bonnet 38. A grip for operation is fixed to the tip of this bent portion.
  • the hooking plate 386 is a plate-like member and is fixed to the end of the unlocking handle 371 inside the bonnet 38. Therefore, the hooking plate 386 rotates integrally with the unlocking handle 371.
  • a hooking groove 386a is formed at a position below the center of rotation of the hooking plate 386.
  • the hooking groove 386a is formed as an elongated groove in the left-right direction, and the right end is open.
  • An elongated lock rod 389 is fixed to an appropriate member on the turning frame 31 side.
  • the lock bar 389 extends generally upwardly from the pivot frame 31 and has its end bent into a hook shape. The tip of the lock rod 389 can be inserted into the hooking groove 386a.
  • the hooking plate 386 is formed with an inclined guiding portion 386b.
  • the inclined guide portion 386 b can be rotated by the tip of the lock bar 389 to rotate the hook plate 386.
  • the torsion coil spring 387 is arranged to connect the bracket 388 and the hook plate 386.
  • the torsion coil spring 387 functions as a biasing member, and exerts a spring force on the hooking plate 386 in a clockwise direction in a front view, in other words, a direction in which the hooking groove 386a engages with the tip of the lock rod 389.
  • the rotational stroke of the lock release handle 371 is limited by the appropriate portion of the hook plate 386 hitting the bracket 388. Therefore, after the operator pulls up the unlocking handle 371 to the upper limit, the pulling force that the operator applies to the unlocking handle 371 acts to rotate the bonnet 38 itself in the opening direction.
  • the unlocking handle 371 also has a function as a handle that the operator holds in order to pull up and rotate the bonnet 38. Therefore, the unlocking and releasing operations of the hood 38 can be performed in one action.
  • the driver's seat 39 is attached above the bonnet 38 using a front side support member 361 and a rear side support member 362, as shown in FIG. As a result, a vertical gap is formed between the driver's seat 39 and the upper surface of the bonnet 38.
  • the front support member 361 is formed by bending a metal plate, and is formed in a substantially U-shape that is wide as viewed from the front.
  • the bottom plate portion at the center is fixed to the front of the upper surface of the bonnet 38 at the left and right central portions using a pair of left and right bolts (fixing members) 363.
  • a substantially reverse U-shaped bracket 364 fixed to the lower surface of the driver's seat 39 can be fixed to the left and right side plates via the fulcrum shaft 365, respectively.
  • the rear support member 362 has a cylindrical vibration-proof rubber, and is fixed to the rear of the top surface of the bonnet 38 in a pair.
  • the lower surface of the driver's seat 39 can be attached to the upper end of each rear support member 362.
  • the belt 372 is configured as an elongated band, and buckles for fixing to the bonnet 38 are fixed at both ends thereof.
  • the buckle portion is made of, for example, metal or synthetic resin, and is fixed to the bonnet 38 together with the front side support member 361 by the aforementioned bolt 363.
  • the longitudinal middle portion of the belt 372 is made of, for example, polyester fiber, and has flexibility.
  • the length of the belt 372 is slightly longer than the distance between the attachment points (i.e., the bolts 363) at the both ends, so there is a slight slack. Therefore, the middle portion of the belt 372 can be disposed so as to hang forward and downward while slightly projecting forward from the front end of the driver's seat 39. Since the belt 372 deforms easily, even if the belt 372 touches the operator who gets on and off the revolving task vehicle 1, it does not easily get in the way. However, the belt 372 can be stored in the space between the bonnet 38 and the driver's seat 39 by pushing the belt 372 backward below the driver's seat 39.
  • FIG. 15 is a schematic side view for explaining the function of the bonnet stay 48. As shown in FIG.
  • a stay support member 346 is fixed in the space of the upper swing body 12 covered by the bonnet 38.
  • the stay support member 346 is formed in a plate shape, and is disposed with its thickness direction oriented in the left-right direction.
  • a guide member 47 is fixed at an appropriate position on the inner wall of the bonnet 38.
  • the guide member 47 is formed with a guide groove 47 a which is elongated in the front-rear direction. One end of the guide groove 47a is bent short.
  • a bonnet stay 48 formed in a bar shape is rotatably supported.
  • the other end of the bonnet stay 48 is inserted into a guide groove 47a formed in the guide member 47 and can slide along the guide groove 47a.
  • the operator holds the unlocking handle 371 with one hand and pulls up with both hands while holding the belt 372 with the other hand. Since the belt 372 is deformable, it can be firmly held and held by large persons as well as small persons.
  • An upward operating force is applied to the lock release handle 371 to unlock the lock mechanism 380, and then the bonnet 38 rotates rearward and upward around the rotation shaft 245c. Since the force is applied to the bonnet 38 at two points of the lock release handle 371 and the belt 372, the force of both arms can be stably applied, and an urging device (auxiliary device) such as a torsion bar can be used. Even without it, the rotation of the bonnet 38 is smooth.
  • the bonnet stay 48 rotates, and the tip thereof moves along the guide groove 47a.
  • the tip of the bonnet stay 48 enters the bent portion of the guide groove 47a, and the bonnet stay 48 It can be pulled and held. In this state, for example, even when a force for rotating the bonnet 38 accidentally in the maintenance operation is applied, the tip of the bonnet stay 48 enters the short groove connected to the bent portion of the guide groove 47a.
  • the bonnet stay 48 is braced at the end and the bonnet 38 is prevented from closing unexpectedly.
  • the bonnet stay 48 is slightly pulled up by hand so that the tip thereof comes out of the short groove in the guide groove 47a and then unlocked. With the handle 371 and the belt 372, the bonnet 38 may be rotated in the opposite direction to the above.
  • the turning work vehicle 1 includes the console box 52.
  • the console box 52 includes a box body 55, a work operation lever 65, a lock lever 56, a gas damper 74, and a lock cam 79.
  • the box body 55 is rotatable between a first attitude P1 and a second attitude P2 flipped up from the first attitude P1.
  • the operation control lever 65 is arranged to protrude from the box body 55.
  • the lock lever 56 is disposed so as to protrude from the box body 55 and is rotatable.
  • the gas damper 74 urges the box body 55 toward the second posture P2.
  • the lock cam 79 locks the rotation of the box main body 55 in both the first posture P1 and the second posture P2.
  • the lock cam 79 includes a first plate 66 and a cam arm 81.
  • a cam groove 88 is formed in the first plate 66.
  • the cam arm 81 rotates integrally with the lock lever 56.
  • the cam arm 81 is provided with a guide protrusion 83 inserted into the cam groove 88.
  • a torsion coil spring 86 for biasing the cam arm shaft 80 is disposed to connect the cam arm 81 and the first plate 66.
  • the cam arm 81 reverses the direction of rotation by the biasing force of the torsion coil spring 86 while the guide projection 83 moves along the cam groove 88.
  • the coil portion of the torsion coil spring 86 is disposed closer to the left and right center of the box body 55 than the first plate 66.
  • the torsion coil spring 86 which can realize a large stroke while suppressing the size of the spring itself, the space inside the box main body 55, in particular, on the left and right center side of the box main body 55 than the first plate 66. Space can be used effectively. As a result, downsizing of the console box 52 is facilitated.
  • the cam arm 81 is provided with a plate-like arm main body 82 and a spring receiving member 84.
  • the arm body 82 is disposed closer to the left and right center of the box body 55 than the first plate 66.
  • the spring receiving member 84 projects from the arm body 82 to a side near the center of the box body 55 in the left and right direction.
  • One end of the spring wire of the torsion coil spring 86 is attached to the first plate 66, and the other end is attached to the spring receiving member 84.
  • the arm main body 82 of the cam arm 81 is brought close to the first plate 66 to effectively utilize the space inside the box main body 55, and at the same time, the cam arm 81 is biased by the torsion coil spring 86 having a high space saving property. it can.
  • the coil portion of the torsion coil spring 86 and the spring wire are the first plate both when the box body 55 is in the first posture P1 and in the second posture P2. It is above the position where it is attached to 66.
  • the spring wire extends downward and is connected to the first plate 66, so that the coil portion of the torsion coil spring 86 can be less likely to interfere with other components in the box body 55. As a result, a compact configuration can be realized.
  • the biasing member that biases the box main body 55 to the second posture P2 side is configured as a gas damper 74.
  • the cam groove 88 is formed in a smooth curved line shape.
  • the turning work vehicle 1 of the present embodiment is provided with a work operation lever 65, a control box 152, and a traveling speed shift switch 155.
  • the work control levers 65 are respectively disposed on the left and right sides of the driver's seat.
  • the control box 152 is provided to project upward on the floor surface in front of the driver's seat 39.
  • the traveling speed shift switch 155 is operated by the operator to switch the traveling speed.
  • the travel speed selection switch 155 is provided at the top of the steering box 152.
  • the traveling speed shift switch 155 at a position where the operator sitting on the driver's seat 39 can visually recognize, the operator can easily confirm the operating state of the high speed / low speed. Further, by arranging the traveling speed shift switch 155 in the control box 152 located in front of the driver's seat 39, the operator can switch the traveling speed with either the left or the right hand, thereby improving the freedom of operation. be able to.
  • control box 152 is provided with a lamp 58 for displaying the operating state of the traveling speed shift switch 155.
  • the travel operation levers 36L and 36R disposed in the control box 152 are provided.
  • the traveling speed shift switch 155 is disposed at a position deviated from the traveling operation levers 36L and 36R in the left-right direction of the control box 152.
  • the operator can operate the traveling speed shift switch 155 with the other hand while operating the traveling operation levers 36L and 36R with one hand. That is, the convenience of both-hand operation can be improved.
  • the turning work vehicle 1 of the present embodiment is provided with a first port 181 and a second port 182 for driving the attachment work machine, and a power takeout pedal 156.
  • the power take-off pedal 156 is used by the operator to operate the attachment work machine with his / her foot. When the power take-off pedal 156 is operated from the neutral position to one side, the hydraulic fluid is supplied to the first port 181, and when operated to the opposite side, the hydraulic fluid is supplied to the second port 182.
  • the attachment work machine includes the double acting attachment cylinder 90
  • the attachment cylinder 90 can be operated by stepping on the power takeout pedal 156 to one side / the other side. Therefore, an intuitive and easy-to-understand operation feeling can be realized.
  • the turning work vehicle 1 includes a bonnet 38, a console box 52, a solenoid valve 264, and a safety frame 266.
  • the bonnet 38 is rotatably supported around a rotation shaft 245 c disposed at the rear of the engine 33, covers the engine 33, and can be opened and closed.
  • the console box 52 has a work operation lever 65 operated by an operator, is rotatably supported by the bonnet 38, and rotates in the same direction as the rotational direction in which the bonnet 38 is opened.
  • the posture can be switched to the posture P2, and switching from the second posture P2 to the first posture P1 is possible by rotating in the opposite direction.
  • the solenoid valve 264 enables operation of the work operation lever 65 when the console box 52 is in the first posture P1 and the bonnet 38 is in the closed state, and otherwise operates the operation of the work operation lever 65. Disable.
  • the safety frame 266 blocks the opening and closing of the hood 38 when the console box 52 is in the first posture P1, and allows the opening and closing of the hood 38 when the console box 52 is in the second posture P2.
  • the bonnet 38 can be opened with the console box 52 in the second posture P2, and maintenance of the engine 33 and the like can be performed accordingly.
  • the solenoid valve 264 invalidates the operation of the work operation lever 65. Therefore, for example, when maintenance of the hydraulic circuit is performed by opening the bonnet 38 in a state where the engine 33 is operated, even if the work operation lever 65 is accidentally touched, an operation corresponding to that is performed. Can be prevented.
  • the safety frame 266 can ensure that the console box 52 is in the second posture P2 when the hood 38 is opened and closed. Therefore, it is possible to reliably prevent the operation of the swing working vehicle 1 caused by touching the work operation lever 65 when the bonnet 38 is opened and closed.
  • the turning work vehicle 1 includes a driver's seat 39.
  • the safety frame 266 includes a support 270 and a second connecting portion 272.
  • the columns 270 are arranged in a pair at intervals in the width direction of the driver's seat 39.
  • the second connection portions 272 connect the columns 270 to one another.
  • the distance between the rotational center of the bonnet 38 (supporting shaft 69) and the tip of the operation control lever 65 in the first posture P1 is a radius
  • the imaginary circle centered on the rotational center of the bonnet 38 (rotational axis 245c) is a first virtual circle C1.
  • a distance between the rotation shaft 245c and the tip of the work operation lever 65 in the second posture P2 is a radius, and a virtual circle centered on the rotation shaft 245c is a second virtual circle C2.
  • all of the second connection portions 272 are disposed inside the first virtual circle C1.
  • the entire second connecting portion 272 is disposed outside the second virtual circle C2.
  • the operation control lever 65 abuts on the second connection portion 272, whereby the rotation of the bonnet 38 is blocked. Therefore, it is possible to reliably prevent the hood 38 from opening and closing in the state where the console box 52 is in the first posture P1.
  • the distance between the rotation center of the console box 52 (the support shaft 69) and the tip of the operation control lever 65 is a radius, and a virtual circle centered on the support shaft 69 in the state where the bonnet 38 is closed. As a third virtual circle C3. At this time, the second connection portion 272 is disposed outside the third virtual circle C3.
  • the second connecting portion 272 does not disturb the switching of the attitude of the console box 52, so that a series of operations for opening and closing the bonnet 38 can be smoothly performed.
  • the second connection portion 272 is formed to be forward as approaching the connection point to the support 270 from the longitudinal middle portion thereof.
  • a space can be secured around the operator sitting on the driver's seat 39 to improve the comfort.
  • the turning work vehicle 1 includes the bonnet 38, the lock release handle 371, and the belt 372.
  • the bonnet 38 is rotatably supported about a rotation shaft 245 c located at the rear of the engine 33, covers the engine 33, and can be opened and closed.
  • the unlocking handle 371 is disposed on the front of the bonnet 38.
  • the belt 372 is disposed on the bonnet 38 at a position higher than the unlocking handle 371.
  • the unlocking handle 371 and the belt 372 can be grasped with one hand, and the hood 38 can be opened and closed using both hands. Therefore, opening and closing operations of the bonnet 38 can be performed easily and smoothly. Therefore, for example, even when the torsion bar or the like for urging the bonnet 38 in the opening direction is omitted, the maintainability of the engine 33 and the like can be improved.
  • the turning work vehicle 1 of the present embodiment includes a driver's seat 39 mounted on the top surface of the bonnet 38. At least a portion of the belt 372 is storable in the space formed between the bonnet 38 and the driver's seat 39.
  • the belt 372 can be stored in an unobtrusive place.
  • the belt 372 is a flexible elongated strip. Both longitudinal ends of the belt 372 are attached to the bonnet 38, and the middle portion can be stored in the space formed between the bonnet 38 and the driver's seat 39.
  • FIG. 16 is a perspective view showing in detail the retractable handle 372x of the second embodiment.
  • members that are the same as or similar to the above-described embodiment may be assigned the same reference numerals in the drawings, and descriptions thereof may be omitted.
  • the second embodiment differs from the first embodiment in that a retractable handle 372x is provided on the bonnet 38 instead of the belt 372 described above. Note that, in FIG. 16, in order to show the retractable handle 372x and the like in an easily understandable manner, a state in which appropriate members such as the console box 52 and the like around the driver's seat 39 are removed from the bonnet 38 is depicted.
  • the retractable handle 372 x is attached to the top surface of the bonnet 38 via a slide mechanism 390.
  • the slide mechanism 390 includes a guide bracket 395, a pair of sliders 396, and two guide pins 397.
  • the guide bracket 395 is formed as an elongated member having an inverted U-shaped cross section, and is fixed to the front of the upper surface of the bonnet 38 and to the left and right center with its longitudinal direction directed in the front-rear direction.
  • penetrating guide grooves 395a having the same shape on the left and right are respectively formed.
  • Each guide groove 395a is formed in a lateral E shape, and in this guide groove 395a, three short holding grooves extending downward are formed at equal intervals.
  • the holding groove is disposed at the front end portion, the rear end portion, and the central portion of the guide groove 395a.
  • the sliders 396 are provided in a pair so as to sandwich the guide bracket 395 in the left-right direction.
  • Each slider 396 is elongated in the front-rear direction, and its front end is fixed to both ends of a retractable handle 372 x formed in a substantially C shape in plan view.
  • Each of the two guide pins 397 is a thin round rod-like member.
  • Each guide pin 397 is disposed with its longitudinal direction oriented in the left-right direction so as to connect the pair of sliders 396 with each other.
  • the guide pins 397 are inserted into guide grooves 395a formed on both side walls of the guide bracket 395, and can move along the guide grooves 395a.
  • the respective guide pins 397 are spaced apart in the front-rear direction and oriented parallel to one another. The distance between the guide pins 397 is equal to the distance between the three holding grooves formed in the guide groove 395a.
  • the retractable handle 372x is formed to have a width smaller than the distance between the side plates of the front side support member 361 described above. In addition, the retractable handle 372x is disposed such that the front end thereof protrudes to the front side of the guide bracket 395.
  • FIG. 16 shows a state in which the retractable handle 372x is in the use position with the two guide pins 397 entering the front end portion and the center holding groove of the guide groove 395a.
  • the retractable handle 372x is slidably movable, and is accommodated in the space formed between the bonnet 38 and the driver's seat 39 by moving to one side. It is possible.
  • the retractable handle 372x can be stored as needed by a simple operation of sliding it.
  • the traveling speed shift switch 155 may be arranged side by side with respect to the traveling operation levers 36L and 36R in the left-right direction. Also, a traveling speed shift switch 155 may be disposed on the upper rear surface.
  • the traveling speed shift switch 155 may be configured as another type of electrical switch instead of the rocker switch.
  • the lamp 58 may be disposed, for example, in the vicinity of the traveling speed stage switching switch 155 on the upper surface of the steering box 152 instead of the configuration incorporated in the traveling speed stage switching switch 155.
  • each operation member can be changed as appropriate.
  • the power take-off pedal 156 may be disposed on the right side of the steering box 152.
  • the first plate 66 in which the cam groove 88 is formed is integrally formed with the bottom plate 64 in the above embodiment, but may be configured as a separate part.
  • the cam groove 88 can also be formed as a non-penetrating groove. Further, the cam groove 88 is not limited to the above-mentioned shape, but may be various shapes in consideration of the length of the cam arm 81 and the like.
  • the guide projection 83, the spring receiving member 84 and the like may be integrally formed on the cam arm 81.
  • the positional relationship between the first support plate 61, the cam arm 81, the torsion coil spring 86, etc. may be reversed.
  • the console box 52 may be provided on only one of the left and right sides instead of the left and right one pair.
  • various sensors such as an optical sensor and a potentiometer can be used instead of the hood switch 275.
  • various other sensors can be used instead of the electric switch 94.
  • a controller comprising a computer may be provided to control the opening and closing of the solenoid valve 264 by detecting the opening and closing of the bonnet switch 275 and the electric switch 94 by a sensor.
  • the safety frame 266 may be further provided with a canopy.
  • the belt 372 and the retractable handle 372x are configured to project forward so that the hood 38 can be hung from the front.
  • a belt 372 or retractable handle 372x may be mounted to project from the bonnet 38 to at least one of the left and right.
  • the two handles be disposed on the front side of the bonnet 38 (far from the rotation shaft 245c) because the bonnet 38 can be opened with a light force.
  • a rod-like lever that rotates about an axis in the front-rear direction is used as the lock release handle 371.
  • the lock release handle for example, a flap-like handle that rotates about an axis in the horizontal direction may be used.
  • the hood 38 is unlocked by pulling up the handle.
  • the buckle portion of the belt 372 may be provided with an adjustment mechanism capable of adjusting the length of the belt 372 according to, for example, the size of the operator's hand.
  • an adjustment mechanism capable of adjusting the length of the belt 372 according to, for example, the size of the operator's hand.
  • a rope instead of the belt 372, for example, a rope may be used.
  • a recessed portion capable of storing the belt 372 pushed backward may be formed on the upper surface of the bonnet 38.
  • the operating member for unlocking the bonnet 38 and the handle held for rotating the bonnet 38 may be separate members.
  • the slide mechanism 390 can be changed to a configuration in which the rod is slidably supported by, for example, a cylinder.
  • the present invention can be applied to work vehicles of various other configurations and applications as well as turning work vehicles.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
PCT/JP2018/031632 2017-09-14 2018-08-28 作業車両 WO2019054165A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1020197022698A KR102271408B1 (ko) 2017-09-14 2018-08-28 작업 차량
KR1020227003580A KR102500122B1 (ko) 2017-09-14 2018-08-28 작업 차량
KR1020217019745A KR102359400B1 (ko) 2017-09-14 2018-08-28 작업 차량
EP18855228.5A EP3674485B1 (en) 2017-09-14 2018-08-28 Work vehicle
BR112020004836-4A BR112020004836A2 (pt) 2017-09-14 2018-08-28 veículo de trabalho

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP2017176442A JP6739413B2 (ja) 2017-09-14 2017-09-14 作業車両
JP2017-176442 2017-09-14
JP2017-180262 2017-09-20
JP2017180259A JP7094679B2 (ja) 2017-09-20 2017-09-20 作業車両
JP2017180262A JP6894334B2 (ja) 2017-09-20 2017-09-20 作業車両
JP2017180263A JP6985078B2 (ja) 2017-09-20 2017-09-20 作業車両
JP2017-180263 2017-09-20
JP2017-180259 2017-09-20

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KR (3) KR102359400B1 (ko)
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JP2008063889A (ja) * 2006-09-11 2008-03-21 Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd 建設機械の操作装置
JP2009030248A (ja) 2007-07-24 2009-02-12 Yanmar Co Ltd 旋回作業車の運転操作部

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Publication number Priority date Publication date Assignee Title
CN112962708A (zh) * 2021-04-07 2021-06-15 雷沃工程机械集团有限公司 一种挖掘机扶手箱整套机构
CN112962708B (zh) * 2021-04-07 2023-12-12 雷沃工程机械集团有限公司 一种挖掘机扶手箱整套机构

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KR20210080635A (ko) 2021-06-30
EP3674485A4 (en) 2021-06-02
EP3674485B1 (en) 2023-10-04
KR102271408B1 (ko) 2021-06-30
EP3674485A1 (en) 2020-07-01
BR112020004836A2 (pt) 2020-09-15
KR102359400B1 (ko) 2022-02-08
KR102500122B1 (ko) 2023-02-14
KR20190104370A (ko) 2019-09-09
KR20220018635A (ko) 2022-02-15

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