Work vehicle

Abstract

To provide a working vehicle excellent in maintainability.SOLUTION: A working machine (revolving working machine 1) includes a machine body frame, a bonnet 38, a driver's seat 39, a first console 52 and a second console 52, and a first hydraulic hose 5L and a second hydraulic hose 5R. The hood 38 covers the top of the vehicle body frame. The driver's seat 39 is disposed on the hood 38. The first console 52 and the second console 52 are arranged in a pair on the left and right sides so as to sandwich the driver's seat 39. The first hydraulic hose 5L is connected to the first console 52, and the second hydraulic hose 5R is connected to the second console 52. The first hydraulic hose 5L and the second hydraulic hose 5R extend from the console 52 toward the rear of the vehicle body frame so as to approach each other.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a work vehicle equipped with a console box. [Background technology]

[0002] 2. Description of the Related Art Conventionally, work vehicles have been known in which a console box is disposed next to the driver's seat. Patent Documents 1 and 2 disclose this type of work vehicle.

[0003] The construction machine of Patent Document 1 is equipped with a hood that opens and closes both the top and rear openings of the engine compartment. The hood rotates around a hinge at the front end. A console box is provided on the top surface of the hood so that it rotates integrally with the hood.

[0004] The compact construction machine of Patent Document 2 is equipped with a box cover that rotates around a fulcrum at the upper edge of the front of the main body cover. A control box is supported on the box cover. One end of a support pole is attached to the back of the box cover via a bearing, and the other end of this support pole is engaged with an engagement hole on the main body cover. With this configuration, by lifting the box cover and holding its rear end with the support pole, an opening for inspection and maintenance can be secured on the back side of the box cover. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-265582 [Patent Document 2] Patent No. 3610840 Summary of the Invention [Problem to be solved by the invention]

[0006] However, with the configuration of Patent Document 1, if the console box is rotated toward the rear of the hood while the hood is kept open during maintenance work, etc., there is a risk that the hood may suddenly close as the console box rotates.

[0007] In the configuration of Patent Document 2, the size of the inspection and maintenance opening formed by lifting the box cover with the support is partial and limited. Therefore, in order to efficiently maintain the equipment housed through the opening, it is necessary to position the equipment requiring maintenance so that it is exposed through the opening. In other words, there is a problem in that there are restrictions on the layout of the equipment.

[0008] Furthermore, with the configuration of Patent Document 2, for example, when performing engine maintenance, it is necessary to open the entire top of the main body cover. However, because the top plate of the main body cover and the left and right box covers are independent of each other, opening all of the covers is time-consuming and makes it difficult to perform maintenance efficiently. Therefore, there is room for improvement in maintainability.

[0009] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a work vehicle that is easy to maintain. [Means for solving the problem]

[0010] A work vehicle according to one aspect includes a machine frame, a hood, a driver's seat, a first console, a second console, and a first hydraulic hose and a second hydraulic hose. The hood covers the upper part of the machine frame. The driver's seat is disposed on the hood. The first console and the second console are disposed in a left-right pair on either side of the driver's seat. The first hydraulic hose is connected to the first console, and the second hydraulic hose is connected to the second console. The first hydraulic hose and the second hydraulic hose extend from the console toward the rear of the machine frame so as to approach each other. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a side view showing the overall configuration of a work vehicle according to an embodiment of the present invention; [Figure 2] FIG. 10 is a perspective view showing hydraulic hoses arranged inside the hood to connect to the work control levers on the console. [Figure 3] FIG. 3 is a perspective view showing the hydraulic hose in a different orientation from that of FIG. 2 . [Figure 4] FIG. 4 is a perspective view showing a state in which the hood is open and the console is in a second position. DETAILED DESCRIPTION OF THE INVENTION

[0012] Next, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a side view showing the overall configuration of a slewing work vehicle 1 according to one embodiment of the present invention. Fig. 2 is a perspective view showing hydraulic hoses 5L, 5R arranged inside the hood 38 to be connected to the work operation lever 37 of the console 52. Fig. 3 is a perspective view showing the hydraulic hoses 5L, 5R in a different orientation from that shown in Fig. 2. Fig. 4 is a perspective view showing the state when the hood 38 is open and the console 52 is in the second position.

[0013] In the following description, "front," "rear," "left," and "right" refer to the front, back, left, and right directions as seen by the operator sitting in the driver's seat 39, with the front of the lower running body 11 (described below) and the front of the upper rotating body 12 aligned.

[0014] The slewing work vehicle (work vehicle) 1 of this embodiment shown in FIG. 1 includes a lower traveling body 11 and an upper slewing body 12.

[0015] The lower traveling body 11 includes a pair of crawler traveling devices 21 arranged on the left and right, and a hydraulic motor (not shown) that drives the crawler traveling devices 21. The lower traveling body 11 can drive the left and right crawler traveling devices 21 individually in various directions and at various speeds, thereby enabling various traveling motions such as moving forward or backward in a straight line and steering.

[0016] The upper rotating body 12 includes a rotating frame 31 , an engine 33 , a hydraulic pump unit 34 , a bonnet 38 , a control section 35 , and a working device 13 .

[0017] The swivel frame 31 is disposed above the undercarriage 11 and is supported by the undercarriage 11 so as to be rotatable about a vertical axis. The swivel frame 31 can rotate relative to the undercarriage 11 by being driven by a swing motor (not shown). The engine 33 is configured as, for example, a diesel engine, and is disposed at the rear of the swivel frame 31. The hydraulic pump unit 34 is driven by the engine 33 and generates hydraulic pressure required for the swivel work vehicle 1 to travel and work.

[0018] The hood 38 covers and protects the upper surface of the engine 33. As shown in FIG. 2, the rear of the hood 38 is connected to the revolving frame 31 by a hinge portion 45 disposed at the rear of the revolving frame 31.

[0019] The hinge portion 45 includes a base member 46 and a pair of left and right brackets 47. The base member is fixed to the rear of the revolving frame 31 using fixing members (not shown). Each bracket 47 is elongated in the vertical direction and fixed to the inner wall of the rear of the hood 38.

[0020] This allows the hood 38 to rotate relative to the revolving frame 31 around a rotation axis (first axis) 71 that is arranged horizontally to the left and right behind the engine 33. Specifically, the hood 38 can be placed in an open state by rotating it rearward and upward, and in a closed state by rotating it in the opposite direction.

[0021] The control unit 35 is equipped with various operating members. These operating members include a pair of travel operating levers 36 and a work operating lever 37, which are arranged on the left and right as shown in Figure 1. In this embodiment, the work operating lever 37 corresponds to the operating lever. The operator can give various instructions to the slewing work vehicle 1 by operating the operating members described above.

[0022] The work device 13 includes a boom 41, an arm 42, and a bucket 43. A hydraulic cylinder is connected to each of the boom 41, the arm 42, and the bucket 43, and various operations such as excavation can be performed with the bucket 43 by extending and retracting the hydraulic cylinder.

[0023] As shown in Fig. 2, an operator's seat 39 where an operator sits is disposed in the center of the left and right sides of the upper surface of the upper rotating body 12. A pair of consoles 52 are disposed on the left and right sides of the operator's seat 39. However, in Fig. 2, the operator's seat 39 and the console 52 are drawn with chain lines to clearly show hydraulic hoses 5L, 5R, etc., which will be described later. The operator's seat 39 and the console 52 are disposed on the upper surface of a hood 38 provided on the upper rotating body 12.

[0024] The left and right consoles 52 are symmetrical to each other and have substantially the same configuration. Each console 52 supports the above-mentioned operation control lever 37 and lock lever 56.

[0025] The work operation lever 37 is disposed on the upper part of the console 52 and protrudes diagonally upward and forward. By operating the work operation lever 37, the operator can give instructions regarding the operation of the work implement 13 or the rotation of the upper rotating body 12.

[0026] A remote control valve (operation valve) 62 arranged inside the console 52 is connected to the work operation lever 37. The remote control valve 62 has one input port and four output ports. The input port of the remote control valve 62 is connected to a pump provided in the hydraulic pump unit 34 via hydraulic hoses 5L and 5R, which will be described later. The output port of the remote control valve 62 is connected to a control valve 84 arranged at the front of the upper rotating body 12 via hydraulic hoses 5L and 5R. The remote control valve 62 opens and closes between the input port and each output port in response to the operator operating the work operation lever 37 forward, backward, left, or right. When the output port is opened, hydraulic oil is sent from the remote control valve 62 to the control valve 84.

[0027] The control valve 84 has multiple spools (not shown) for switching between driving and stopping hydraulic actuators provided in the work implement 13, etc. The control valve 84 uses the hydraulic oil sent from the remote control valve 62 as pilot pressure to displace the spools, thereby operating the hydraulic actuators and enabling the upper rotating body 12 to rotate and various tasks to be performed using the work implement 13.

[0028] The lock lever 56 is disposed at the lower front portion of the console 52 and protrudes obliquely upward and forward. The lock lever 56 is operated to switch the position of the console 52.

[0029] Specifically, the console 52 is supported rotatably about a hinge shaft (second shaft) 72 located at the rear of the console. By operating the lock lever 56, the operator can switch the console 52 between a normal first position, shown by a solid line in FIG. 1, and a second position, shown by a chain line, as indicated by the outline arrow. The first position is the normal position when the operator operates the work operation lever 37. The second position is a position in which the console 52 is flipped up and rearward from the first position, and is used when, for example, the operator needs to temporarily retract the console 52 up and rearward when getting on or off the rotating work vehicle 1.

[0030] The rotation direction when the hood 38 is opened from a closed state is the same as the rotation direction when the console 52 is switched from the first position to the second position. Therefore, when the console 52 is switched from the first position to the second position with the hood 38 in an open state, the center of gravity of the entire vehicle, including the hood 38 and the console 52, moves toward the opening side of the hood 38. Therefore, the hood 38 can be stably maintained in an open state.

[0031] The hydraulic circuit of the slewing work vehicle 1 is provided with a locking function that disables operation of the work operation lever 37 when the console 52 is in the second position. This prevents unexpected movement even if the operator's hand or the like accidentally hits the work operation lever 37 of the console 52 in the second position. This locking function can be realized, for example, by controlling the remote control valve 62 to cut off the supply of hydraulic oil when a sensor or the like detects that the console 52 is in the second position.

[0032] The hydraulic hoses 5L, 5R are provided in pairs on the left and right, and each is flexible. Each of the left and right hydraulic hoses 5L, 5R includes four hoses that are connected to the output ports of the remote control valve 62. Each will be described in detail below.

[0033] One end of the left hydraulic hose 5L is connected to the remote control valve 62 inside the left console 52. The hydraulic hose 5L curves in a substantially S-shape from the point where it is connected to the remote control valve 62, and then passes near the hinge shaft 72. The hydraulic hose 5L then passes through an unillustrated opening formed in the bottom surface of the console 52 and an unillustrated opening formed in the left end of the top surface of the hood 38, and enters the inside of the hood 38.

[0034] The hydraulic hose 5L that enters the hood 38 is immediately bent rearward and extends diagonally rearward to the right, roughly along the ceiling surface of the hood 38. Near the location where the hinge part 45 is installed, the hydraulic hose 5L is bent almost vertically and extends downward along the longitudinal direction of the left-side bracket 47. A plurality of holding members (fixing members) 8 formed by bending a round rod-shaped member into a C-shape, a hook shape, or the like are fixed to the bracket 47 in an array one above the other, and the hydraulic hose 5 passes through the inside of these holding members 8. During this process, the hydraulic hose 5 also passes near the rotation shaft 71.

[0035] After reaching below the rotary shaft 71, the hydraulic hose 5L extends downward and forward and slightly to the left, passing below and to the left of the engine 33. In the portion passing near the engine 33, the hydraulic hose 5L is bent in a generally V-shape so as to be convex downward. From this bent portion 9, the hydraulic hose 5L extends substantially forward and reaches a portion below and to the left of the control valve 84. The hydraulic hose 5L is then bent upward as appropriate and connected to the control valve 84.

[0036] One end of the right hydraulic hose 5R is connected to the remote control valve 62 inside the right console 52. The configuration of the portion from the remote control valve 62 to the rotation shaft 71 of the hinge part 45 is substantially symmetrical to the left hydraulic hose 5L described above, and therefore description thereof will be omitted.

[0037] After reaching below the rotary shaft 71, the hydraulic hose 5R extends downward and forward and to the right, as shown in Figure 3, and passes below and to the right of the engine 33 and the hydraulic pump unit 34. The hydraulic hose 5L then extends to the left and further forward, reaching a portion below and to the left of the control valve 84. The hydraulic hose 5R is then bent upward as appropriate and connected to the control valve 84.

[0038] In this way, the hydraulic hoses 5L, 5R are arranged along the inner wall of the revolving frame 31 and the inner wall of the bonnet 38, thereby making it possible to secure a wide space surrounded by the revolving frame 31 and the bonnet 38. As a result, various devices can be arranged efficiently in this space.

[0039] The left and right hydraulic hoses 5L, 5R are wrapped with binding bands (fixing members) 7 at multiple locations along their length and fixed to the revolving frame 31 or the hood 38, etc. The binding bands 7 are also fixed to the holding members 8 provided on the brackets 47.

[0040] 2 and 3, with the hood 38 closed, the hydraulic hoses 5L, 5R are slightly bent and slackened between the point where they are fixed by the retaining member 8 near the rotation shaft 71 and the nearest point above or below that where they are fixed by the cable tie 7. The presence of this bent portion ensures that the hydraulic hoses 5L, 5R have room to stretch when the hood 38 is opened as shown in Figure 4, and prevents the hydraulic hoses 5L, 5R from pulling on the hood 38 and creating resistance to the opening operation.

[0041] 2, an output pulley 76 is fixed to the crankshaft on the left side of the engine 33. A fan pulley 77 and a tension pulley 78 are also disposed at appropriate positions on the left side of the engine 33. An endless belt 79 is wound around the output pulley 76, the fan pulley 77, and the tension pulley 78. In this embodiment, the bent portion 9 formed in the left hydraulic hose 5L is oriented in a direction parallel to the portion of the belt 79 between the output pulley 76 and the tension pulley 78, and includes a portion of the belt 79 that is close to that portion. This prevents the belt 79 from getting caught, and allows the engine 33 and the hydraulic hose 5L to be arranged in a compact space.

[0042] As described above, the swivel work vehicle 1 of this embodiment includes a swivel frame 31, a hood 38, and a console 52. The engine 33 is disposed on the swivel frame 31. The hood 38 is rotatably supported about a rotation shaft 71 disposed behind the engine 33 and opens and closes by rotating relative to the swivel frame 31. The console 52 is rotatably supported about a hinge shaft 72 disposed above the hood 38 and can be switched between a first position and a second position by rotating relative to the hood 38. The console 52 includes a work operation lever 37 that is operable in the first position and inoperable in the second position. The direction in which the hood 38 is rotated to open it is the same as the direction in which the console 52 is rotated to switch from the first position to the second position. Hydraulic hoses 5L, 5R connected to the console 52 are arranged so as to pass near the rotation shaft 71 and near the hinge shaft 72 and to run along the inner wall of the revolving frame 31 and the inner wall of the hood 38.

[0043] As a result, even if the console 52 is rotated to disable operation of the work operation lever 37 after the hood 38 is opened, the center of gravity of the entire unit, including the hood 38 and console 52, moves toward the opening side of the hood 38, preventing the open hood 38 from accidentally closing and allowing maintenance work to be performed with peace of mind. Also, because the hydraulic hoses 5L, 5R are positioned so as not to interfere with work, maintenance can be easily performed with the hood 38 open.

[0044] Furthermore, in the swivel work vehicle 1 of this embodiment, the hydraulic hoses 5L, 5R are fixed to the swivel frame 31 or the hood 38 by a plurality of cable ties 7 or holding members 8 arranged at intervals in the longitudinal direction. With the hood 38 closed, the hydraulic hoses 5L, 5R are loose between adjacent cable ties 7 or holding members 8 near the rotation shaft 71.

[0045] This ensures that the hydraulic hoses 5L, 5R can be stretched near the rotation shaft 71 of the hood 38, preventing the hydraulic hoses 5L, 5R from pulling on the hood 38 and creating resistance to the opening operation. Therefore, the hood 38 can be opened smoothly.

[0046] In addition, in the slewing work vehicle 1 of this embodiment, the left hydraulic hose 5L is bent so that the side farther from the console 52 than the rotation axis 71 is convex downward, as shown in Figure 2, and this bent part (bent part 9) passes near the engine 33.

[0047] This allows both the engine 33 and the hydraulic hose 5L to be arranged in a compact space inside the hood 38.

[0048] Furthermore, in the rotating work vehicle 1 of this embodiment, the engine 33 is equipped with an output pulley 76, a fan pulley 77, and a belt 79. Rotation of the output shaft is output to the output pulley 76. The fan pulley 77 drives the blower fan. The belt 79 is wound around the output pulley 76 and the fan pulley 77. A portion of the hydraulic hose 5L is adjacent to the belt 79 and oriented parallel to it.

[0049] This makes it possible to prevent the hydraulic hose 5L from coming into contact with the belt 79, while also shortening the length of the hydraulic hose 5L.

[0050] The preferred embodiment of the present invention has been described above, but the above configuration can be modified, for example, as follows.

[0051] The paths of the left and right hydraulic hoses 5L, 5R can be changed as appropriate as long as they pass near the rotation axis 71 and near the hinge axis 72 and follow the inner walls of the revolving frame 31 and the hood 38. Here, the inner walls include the inner surfaces of the side walls, as well as the lower surface of the ceiling wall and the upper surface of the floor wall.

[0052] The work operation lever 37 may be configured to be operable only in the forward / backward direction or the left / right direction, for example, instead of being operable in the forward / backward / left / right direction.

[0053] The console 52 does not have to be provided in a pair on the left and right, but may be provided on only one side.

[0054] The present invention can be applied not only to slewing work vehicles, but also to work vehicles of various other configurations and uses.

[0055] <Notes on the invention> According to an aspect of the present invention, there is provided a work vehicle having the following configuration. Specifically, the work vehicle includes a revolving frame, a hood, a console, and hydraulic hoses. An engine is disposed on the revolving frame. The hood is rotatably supported about a first axis disposed behind the engine and opens and closes by rotating relative to the revolving frame. The console is rotatably supported about a second axis disposed above the hood and is switchable between a first position and a second position by rotating relative to the hood. The hydraulic hoses are connected to the console. The console includes an operating lever that is operable in the first position and inoperable in the second position. The direction of rotation to open the hood is the same as the direction of rotation to switch the console from the first position to the second position. The hydraulic hoses are disposed along the inner wall of the hood and pass near the first axis.

[0056] As a result, even if the console is rotated to disable the operation of the operating lever after the hood is open, the center of gravity of the entire vehicle, including the hood and console, moves in the direction of the hood opening, preventing the hood from accidentally closing once opened and allowing maintenance work to be performed with peace of mind.In addition, the hydraulic hoses are positioned so that they do not get in the way of work, making maintenance with the hood open easy.

[0057] A work vehicle according to one embodiment includes a revolving frame, a hood, and a console. An engine is disposed on the revolving frame. The hood is rotatably supported about a first axis disposed behind the engine and opens and closes by rotating relative to the revolving frame. The console is rotatably supported about a second axis disposed above the hood and is switchable between a first position and a second position by rotating relative to the hood. The console includes an operating lever that is operable in the first position and inoperable in the second position. The direction of rotation to open the hood is the same as the direction of rotation to switch the console from the first position to the second position.

[0058] As a result, even if the console is rotated to disable the operation of the operating lever after the hood is opened, the center of gravity of the entire vehicle, including the hood and console, moves in the direction toward the opening of the hood, preventing the open hood from closing unexpectedly and allowing maintenance work to be performed with peace of mind.

[0059] According to an aspect of the present invention, there is provided a work vehicle having the following configuration. Specifically, this work vehicle includes a body frame, a hood, and a console. The hood opens and closes by rotating about a first axis that is disposed horizontally to the left and right of the body frame. The console is disposed above the hood, and by rotating relative to the hood, can be switched between a first position in which an operating lever can be operated and a second position in which the operating lever is tilted rearward. The hood opens by rotating rearward. [Explanation of symbols]

[0060] 1. Swing work vehicle (work vehicle) 5L, 5R hydraulic hose 7 Cable ties (fixing components) 8 Holding member (fixing member) 31 Swivel frame 33 Engine 37 Work operation lever (operation lever) 38 Bonnet 52 Console 71 Rotation axis (1st axis) 72 Hinge axis (second axis)

Claims

1. The aircraft frame and a hood covering an upper portion of the aircraft frame; a driver's seat disposed on the hood; a first console and a second console arranged in a pair on the left and right sides so as to sandwich the driver's seat; a first hydraulic hose connected to the first console and a second hydraulic hose connected to the second console, the first hydraulic hose and the second hydraulic hose extend from the console toward the rear of the aircraft frame so as to approach each other. Work vehicle.

2. The hood is opened and closed by rotating about a first axis that is disposed horizontally to the left and right with respect to the aircraft frame. The work vehicle according to claim 1 .

3. The first axis is disposed at the rear of the aircraft frame. The work vehicle according to claim 2 .

4. The first hydraulic hose and the second hydraulic hose extend downwardly and away from each other below the first axis. The work vehicle according to claim 3 .

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