WO2019054021A1

WO2019054021A1 - Work vehicle

Info

Publication number: WO2019054021A1
Application number: PCT/JP2018/025566
Authority: WO
Inventors: 優嶌田; 隆池末
Original assignee: ヤンマー株式会社
Priority date: 2017-09-14
Filing date: 2018-07-05
Publication date: 2019-03-21
Also published as: EP3683363B1; KR102208847B1; EP3683363A1; EP3683363A4; JP6731898B2; EP4215674A1; BR112020002977A2; KR20190108124A; JP2019052456A

Abstract

A bonnet (38) is supported so as to be capable of rotating around rotational shafts (71) at the rear of an engine (33), and rotates with respect to a revolving frame (31) to open and close. A console (52) is supported so as to be capable of rotating around hinge shafts (72) provided above the bonnet (38), and is capable of switching between a first position and a second position by rotating with respect to the bonnet (38). Hydraulic hoses (5L, 5R) are connected to the console (52). The console (52) is provided with a work operation lever (37) which activates operation when in the first position, and deactivates operation when in the second position. The rotation direction for opening the bonnet (38) is the same direction as the rotation direction for switching the console (52) from the first position to the second position. The hydraulic hoses (5L, 5R) are disposed along an inner wall of the revolving frame (31) and an inner wall of the bonnet (38) so as to pass by the vicinity of the rotational shafts (71) and the vicinity of the hinge shafts (72).

Description

Work vehicle

The present invention relates to a work vehicle provided with a console box.

2. Description of the Related Art A work vehicle is conventionally known in which a console box is disposed beside a driver's seat. Patent documents 1 and 2 disclose this kind of work vehicle.

The construction machine of patent document 1 is provided with the bonnet which opens and closes both the opening part of the upper surface of an engine room, and a rear surface. The bonnet pivots about a hinge provided at the front end. A console box is provided on the upper surface of the upper surface of the bonnet so as to rotate integrally with the bonnet.

The small-sized construction machine of Patent Document 2 includes a box cover that pivots about a fulcrum of a front upper edge portion of the main body cover. A control box is supported by the box cover. One end of a support is attached to the back surface of the box cover via a bearing, and the other end of the support is locked in a locking hole on the main body cover side. In this configuration, an opening for inspection and maintenance can be secured on the back side of the box cover by lifting the box cover and holding the rear end of the box by the column.

Unexamined-Japanese-Patent No. 2010-265582 Patent 3610840

However, in the configuration of Patent Document 1, when the console box is rotated toward the rear side of the bonnet while maintaining the open state of the bonnet in maintenance work etc., the bonnet is rotated with the rotation of the console box. There was a risk of closing unexpectedly.

In the configuration of Patent Document 2, the size of the opening for maintenance formed by lifting the box cover with the support is partial and limited. Therefore, in order to efficiently maintain the device accommodated through the opening, it is necessary to arrange the device requiring maintenance so as to be exposed from the opening. That is, there is a problem that the layout of the device is limited.

Further, in the configuration of Patent Document 2, for example, when maintaining the engine, it is necessary to open the entire upper portion of the main body cover. However, since the top plate portion of the main body cover and the left and right box covers are independent of one another, it takes time and effort to open all the covers, making it difficult to maintain efficiently. Therefore, there is room for improvement in maintainability.

Therefore, the present invention has been made in view of the above circumstances, and an object thereof is to provide a work vehicle having excellent maintainability.

Means and effect for solving the problem

The problem to be solved by the present invention is as described above, and next, means for solving the problem and its effect will be described.

According to an aspect of the present invention, a work vehicle having the following configuration is provided. That is, this work vehicle includes a swing frame, a bonnet, a console, and a hydraulic hose. An engine is disposed on the swing frame. The bonnet is rotatably supported about a first axis disposed at the rear of the engine, and opens and closes by rotating with respect to the pivot frame. The console is rotatably supported about a second axis disposed above the bonnet, and can be switched between a first attitude and a second attitude by rotating with respect to the bonnet. The hydraulic hose is connected to the console. The console is provided with an operation lever in which the operation is effective when in the first posture and the operation is invalid when in the second posture. The direction of rotation to open the hood is the same as the direction of rotation to switch the console from the first orientation to the second orientation. The hydraulic hose is disposed so as to pass near the first axis and near the second axis, and along the inner wall of the pivot frame and the inner wall of the bonnet.

Thus, even when the console is turned to disable the operation of the control lever after opening the bonnet, the movement direction of the entire center of gravity including the bonnet and the console becomes the open side of the bonnet, so the open bonnet Can prevent accidental closing and perform maintenance work with confidence. In addition, since the hydraulic hose is in a position where it does not interfere easily with the work, the maintainability in the state in which the hood is open is good.

In the work vehicle described above, the following configuration is preferable. That is, the hydraulic hose is fixed to the pivot frame or the bonnet by a plurality of fixing members arranged at intervals in the longitudinal direction. When the bonnet is closed, the hydraulic hose is slackened between the fixing members adjacent to each other in the vicinity of the first shaft.

As a result, the extension of the hydraulic hose can be secured in the vicinity of the first shaft that is the rotational shaft of the bonnet, and the hydraulic hose can be prevented from pulling the bonnet and becoming a resistance to the opening operation. Therefore, the hood can be opened smoothly.

In the work vehicle, preferably, the hydraulic hose is bent so that the side farther from the console than the first axis is convex downward, and the bent portion passes near the engine.

This allows both the engine and the hydraulic hose to be arranged in a compact space inside the bonnet.

In the work vehicle described above, the following configuration is preferable. That is, the engine includes an output pulley, a fan pulley, and a belt. The output pulley outputs the rotation of the output shaft. The fan pulley drives a blower fan. The belt is wound around the output pulley and the fan pulley. The hydraulic hose is in close proximity to the belt with a portion thereof oriented parallel to the belt.

Thus, the length of the hydraulic hose can be shortened while suppressing the contact of the hydraulic hose with the belt.

BRIEF DESCRIPTION OF THE DRAWINGS The side view which shows the whole structure of the working vehicle which concerns on one Embodiment of this invention. FIG. 7 is a perspective view showing a hydraulic hose disposed inside the bonnet to connect to a console operation control lever. The perspective view which shows a hydraulic hose in the other direction from FIG. The perspective view showing the state where the bonnet is opened and the console is made into the 2nd posture.

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an overall configuration of a swing working vehicle 1 according to an embodiment of the present invention. FIG. 2 is a perspective view showing the

hydraulic hoses

5L, 5R disposed inside the bonnet 38 for connecting to the work control lever 37 of the console 52. As shown in FIG. FIG. 3 is a perspective view showing the

hydraulic hoses

5L and 5R in a direction different from that in FIG. FIG. 4 is a perspective view showing a state in which the hood 38 is opened and the console 52 is in the second position.

In the following description, “front”, “rear”, “left” and “right” refer to the operator sitting on the driver's seat 39 in a state where the front of the lower traveling body 11 and the front of the upper revolving superstructure 12 coincide with each other. Means front, back, left and right.

A turning work vehicle (work vehicle) 1 of the present embodiment shown in FIG. 1 includes a lower traveling body 11 and an upper revolving structure 12.

The lower traveling body 11 includes a crawler traveling device 21 disposed in a pair of right and left, and a hydraulic motor (not shown) that drives the crawler traveling device 21. 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 a swing motor (not shown). 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. 2, the rear of the bonnet 38 is connected to the pivot frame 31 by a hinge 45 disposed at the rear of the pivot frame 31.

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 pivot frame 31 using a fixing member (not shown). Each of the brackets 47 is elongated in the vertical direction, and is fixed to the inner wall at the rear of the bonnet 38.

As a result, the bonnet 38 can be rotated relative to the turning frame 31 about a rotation axis (first axis) 71 disposed in the left and right horizontal direction behind the engine 33. 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 various operation members. The operation members include a travel operation lever 36, a work operation lever 37, and the like which are disposed in a pair of right and left as shown in FIG. In the present embodiment, the work operation lever 37 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 working device 13 includes a boom 41, an arm 42, and a bucket 43. 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.

As shown in FIG. 2, a driver's seat 39 on which the operator sits is disposed at the left and right center of the upper surface of the upper swing body 12. And the console 52 is arrange | positioned by one pair of right and left so that the driver's seat 39 may be pinched | interposed. However, in FIG. 2, the driver's seat 39 and the console 52 are drawn by a chain line in order to easily show the

hydraulic hoses

5L, 5R and the like described later. The driver's seat 39 and the console 52 are disposed on the upper surface of the bonnet 38 provided in the upper swing body 12.

The left and right consoles 52 are symmetrical to each other, and the configuration is substantially the same. Each console 52 supports the operation control lever 37 and the lock lever 56 described above.

The work control lever 37 is disposed on the top of the console 52 and projects obliquely upward and forward. The operator can operate the work operation lever 37 to give an instruction on the operation of the work device 13 or the swing of the upper swing body 12.

A remote control valve (operation valve) 62 disposed 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 included in the hydraulic pump unit 34 via

hydraulic hoses

5L and 5R described later. The output port of the remote control valve 62 is connected to a control valve 84 disposed at the front of the upper swing 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 back and forth and right and left. When the output port is opened, hydraulic oil is sent from the remote control valve 62 to the control valve 84.

The control valve 84 includes a plurality of spools (not shown) for switching driving / stopping of the hydraulic actuator provided in the working device 13 and the like. The control valve 84 moves the hydraulic actuator by displacing the spool using the hydraulic oil sent from the remote control valve 62 as a pilot pressure, thereby moving the upper swing body 12 and performing various operations using the working device 13. be able to.

The lock lever 56 is disposed at the lower front of the console 52 and protrudes obliquely upward and forward. The lock lever 56 is operated to switch the attitude of the console 52.

Specifically, the console 52 is rotatably supported about a hinge axis (second axis) 72 disposed at the rear thereof. The operator operates the lock lever 56 to switch the console 52 between the normal first posture shown by the solid line in FIG. 1 and the second posture shown by the dashed line as shown by the outlined arrow. Can. The first posture is a normal posture when the operator operates the work operation lever 37. The second posture is a posture in which the first posture is flipped up to the rear upper side, and is used, for example, when the operator temporarily retracts the console 52 to the rear upper side when getting on and off the revolving task vehicle 1.

The direction of rotation when the hood 38 in the closed state is opened coincides with the direction of rotation for switching the console 52 from the first posture to the second posture. Therefore, when the console 52 is further switched from the first posture to the second posture with the hood 38 open, the moving direction of the center of gravity of the entire body including the hood 38 and the console 52 is the open side of the hood 38. Therefore, the open state of the hood 38 can be stably maintained.

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 37 when the console 52 is in the second posture. As a result, even if the operator's hand or the like erroneously strikes the operation control lever 37 of the console 52 in the second position, it is possible to prevent occurrence of an unexpected operation according to that. This lock function can be realized, for example, by controlling the remote control valve 62 described above so as to shut off the supply of hydraulic oil when the second attitude of the console 52 is detected by a sensor or the like.

The

hydraulic hoses

5L and 5R are provided in pairs on the left and right, and each has flexibility. Each of the left and right

hydraulic hoses

5L, 5R includes four hoses connected to the output port of the remote control valve 62. Each of these will be described in detail below.

One end of the left hydraulic hose 5 </ b> L is connected to the remote control valve 62 inside the left console 52. The hydraulic hose 5 </ b> L is bent in a substantially S-shape from the connection point with the remote control valve 62 and then passes near the hinge shaft 72. Thereafter, the hydraulic hose 5L passes through an opening (not shown) formed on the lower surface of the console 52 and an opening (not shown) formed on the left end of the upper surface of the bonnet 38 and enters the inside of the bonnet 38.

The hydraulic hose 5L that has entered the bonnet 38 is immediately bent rearward, and extends along the ceiling surface of the bonnet 38 diagonally to the right. In the vicinity of the location where the hinge portion 45 is installed, the hydraulic hose 5L is bent substantially vertically and extends downward along the longitudinal direction of the left bracket 47. A plurality of holding members (fixing members) 8 formed by bending a round bar-like member in a C-shape or a bowl shape are vertically aligned and fixed to the bracket 47, and the hydraulic hose 5 is fixed to the inside of the holding member 8. Pass through. Also, in this process, the hydraulic hose 5 passes near the rotating shaft 71.

After reaching the lower side of the rotating shaft 71, the hydraulic hose 5L extends so as to approach the front lower side and the left side slightly and passes the lower left side of the engine 33. In a portion passing near the engine 33, the hydraulic hose 5 is bent in a substantially V shape so as to be convex downward. From this bent portion 9, the hydraulic hose 5L extends substantially forward to the lower left portion of the control valve 84. Thereafter, the hydraulic hose 5L is bent upward appropriately and connected to the control valve 84.

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 rotary shaft 71 of the hinge portion 45 is substantially symmetrical with the left hydraulic hose 5L described above, and thus the description thereof is omitted.

After reaching the lower side of the rotating shaft 71, as shown in FIG. 3, the hydraulic hose 5R extends forward and downward and to the right and passes below the engine 33 and the hydraulic pump unit 34 to the right. Thereafter, the hydraulic hose 5L extends to the left and further to the front and reaches the lower left portion of the control valve 84. Thereafter, the hydraulic hose 5R is bent upward appropriately and connected to the control valve 84.

By arranging the

hydraulic hoses

5L and 5R along the inner wall of the swing frame 31 and the inner wall of the bonnet 38 in this manner, a space surrounded by the swing frame 31 and the bonnet 38 can be widely secured. As a result, various devices can be efficiently arranged in the space.

The left and right

hydraulic hoses

5L and 5R are fixed to the swing frame 31 or the bonnet 38 or the like by winding a plurality of locations midway in the longitudinal direction by the binding band (fixing member) 7. The binding band 7 is also fixed to a portion of the holding member 8 provided in the bracket 47.

In the state where the bonnet 38 is closed as shown in FIGS. 2 and 3, between the fixing point by the holding member 8 near the rotating shaft 71 and the fixing point by the binding band 7 that is closest to the upper or lower side thereof, The

hydraulic hoses

5L and 5R are slightly bent to form a slack. By having this bent portion, it is possible to secure the extension allowance of the

hydraulic hoses

5L, 5R when the bonnet 38 is opened as shown in FIG. 4, and the

hydraulic hoses

5L, 5R pull the bonnet 38 to resist the release operation. Can be prevented.

Furthermore, as shown in FIG. 2, on the left side of the engine 33, an output pulley 76 is fixed to the crankshaft. Further, a fan pulley 77 and a tension pulley 78 are 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 the present embodiment, the bent portion 9 formed on the left hydraulic hose 5L is directed in parallel with the portion between the output pulley 76 and the tension pulley 78 in the belt 79, while the belt 79 is bent. Includes a portion close to that portion of the Thus, the engine 33 and the hydraulic hose 5L can be disposed in a compact space while preventing the belt 79 from winding and the like.

As described above, the turning work vehicle 1 according to the present embodiment includes the turning frame 31, the bonnet 38, and the console 52. An engine 33 is disposed in the swing frame 31. The bonnet 38 is rotatably supported around a rotation shaft 71 disposed at the rear of the engine 33, and opens and closes by rotating with respect to the turning frame 31. The console 52 is rotatably supported about a hinge shaft 72 disposed above the bonnet 38, and can be switched between the first attitude and the second attitude by rotating with respect to the bonnet 38. The console 52 is provided with a work operation lever 37 in which the operation is valid in the first posture and the operation is invalid in the second posture. The direction in which the hood 38 is rotated to open is the same as the direction in which the console 52 is rotated to switch from the first position to the second position. The

hydraulic hoses

5L, 5R connected to the console 52 are disposed so as to pass near the rotation shaft 71 and near the hinge shaft 72 and along the inner wall of the pivot frame 31 and the inner wall of the bonnet 38.

Thereby, even when the console 52 is rotated to invalidate the operation of the operation control lever 37 after the hood 38 is opened, the movement direction of the entire center of gravity including the hood 38 and the console 52 is the open side of the hood 38 As a result, it is possible to prevent the open bonnet 38 from closing unexpectedly and perform maintenance work with ease. Further, since the

hydraulic hoses

5L, 5R are in a position where they do not interfere easily with the work, the maintainability in the state where the bonnet 38 is opened is good.

Further, in the turning work vehicle 1 according to the present embodiment, the

hydraulic hoses

5L and 5R are fixed to the turning frame 31 or the bonnet 38 by a plurality of binding bands 7 or holding members 8 arranged at intervals in the longitudinal direction. . With the bonnet 38 closed, in the vicinity of the rotary shaft 71, the

hydraulic hoses

5L and 5R are slackened between the binding band 7 or the holding member 8 adjacent to each other.

Thereby, the extension allowance of

hydraulic hose

5L, 5R can be secured in the vicinity of rotary shaft 71 of bonnet 38, and

hydraulic hose

5L, 5R is prevented from pulling bonnet 38 and becoming resistance of opening operation. it can. Therefore, the hood 38 can be opened smoothly.

Further, in the swing working vehicle 1 of the present embodiment, the hydraulic hose 5L on the left side is bent so that the side farther from the console 52 than the rotating shaft 71 is convex downward as shown in FIG. A portion (bent portion 9) passes near the engine 33.

As a result, both the engine 33 and the hydraulic hose 5L can be disposed in a compact space inside the bonnet 38.

Further, in the turning work vehicle 1 of the present embodiment, the engine 33 includes an output pulley 76, a fan pulley 77, and a belt 79. The output pulley 76 outputs the rotation of the output shaft. The fan pulley 77 drives a blower fan. The belt 79 is wound around the output pulley 76 and the fan pulley 77. A portion of the hydraulic hose 5 </ b> L is close to the belt 79 in a direction parallel to that of the belt 79.

Thus, the length of the hydraulic hose 5L can be shortened while suppressing the contact of the hydraulic hose 5L with the belt 79.

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

The respective paths of the left and right

hydraulic hoses

5L and 5R can pass through the vicinity of the rotary shaft 71 and the vicinity of the hinge shaft 72, and can be suitably changed as long as they are along the inner wall of the swing frame 31 and the inner wall of the bonnet 38. Here, the inner wall includes the lower surface of the ceiling wall and the upper surface of the floor wall in addition to the inner surface of the side wall.

The work operation lever 37 may be configured to be operable only to the left and right, for example, only to the front and back, instead of the configuration capable of being operated to the front and back and right and left.

The consoles 52 may be provided only on one of the left and right sides instead of the left and right ones.

The present invention can be applied to work vehicles of various other configurations and applications as well as turning work vehicles.

1 Turning work vehicle (work vehicle)
5L, 5R Hydraulic hose 7 Cable ties (fixed member)
8 Holding member (fixed member)
31 Swing frame 33 Engine 37 Operation control lever (control lever)
38 Bonnet 52 Console 71 Rotation Axis (1st Axis)
72 hinge axis (second axis)

Claims

A pivoting frame in which the engine is arranged;
A bonnet rotatably supported about a first axis disposed rearward of the engine and opened and closed by rotating with respect to the pivot frame;
A console which is rotatably supported about a second axis disposed above the bonnet and which is switchable between a first attitude and a second attitude by rotating with respect to the bonnet;
A hydraulic hose connected to the console;
Equipped with
The console is provided with an operation lever which becomes effective when in the first orientation and is ineffective when in the second orientation.
The direction of rotation to open the bonnet is the same as the direction of rotation to switch the console from the first orientation to the second orientation;
The working vehicle is characterized in that the hydraulic hose is disposed so as to pass near the first axis and near the second axis and along the inner wall of the turning frame and the inner wall of the bonnet.
It is a work vehicle according to claim 1, and
The hydraulic hose is fixed to the pivot frame or the bonnet by a plurality of fixing members spaced apart in the longitudinal direction.
The working vehicle according to claim 1, wherein the hydraulic hose is slackened between the fixing members adjacent to each other in the vicinity of the first axis in a state where the hood is closed.
It is a work vehicle according to claim 1, and
The working vehicle is characterized in that the hydraulic hose is bent so that the side farther from the console is convex downward than the first axis, and the bent portion passes near the engine.
The work vehicle according to claim 3,
The engine is
An output pulley to which the rotation of the output shaft is output;
A fan pulley that drives a blower fan,
A belt wound around the output pulley and the fan pulley;
Equipped with
A working vehicle characterized in that the hydraulic hose is in proximity to the belt in a direction parallel to the belt.