JP2024036517A - work vehicle - Google Patents

Abstract

[Problem] To provide a work vehicle with excellent maintainability. [Solution] A bonnet 38 opens and closes by rotating about a first axis that is arranged horizontally to the left and right with respect to the vehicle frame. A console 52 is arranged above the bonnet 38, and by rotating relative to the bonnet 38, the console 52 can be switched between a first position in which the operation lever (work operation lever 37) can be operated, and a second position in which the operation lever (work operation lever 37) is tilted rearward. The bonnet 38 opens by rotating rearward. [Selected Figure] Figure 2

Description

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

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

The construction machine of Patent Document 1 includes a bonnet that opens and closes openings on both the top and rear surfaces of the engine compartment. The bonnet rotates around a hinge provided at the front end. A console box is provided on the upper surface of the hood so as to rotate together with the bonnet.

The small construction machine disclosed in Patent Document 2 includes a box cover that rotates around a fulcrum at the upper front edge of the main body cover. A control box is supported on the box cover. One end of the column is attached to the back surface of the box cover via a bearing, and the other end of the column is locked in a locking hole on the main body cover side. With 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 with the support.

Japanese Patent Application Publication No. 2010-265582 Patent No. 3610840

However, in the configuration of Patent Document 1, if the console box is rotated toward the rear of the hood while the bonnet is kept open during maintenance work, etc., the hood will rotate as the console box rotates. There was a risk that it would close unexpectedly.

In the configuration of Patent Document 2, the size of the opening for inspection and maintenance formed by lifting the box cover with the support is partial and limited. Therefore, in order to efficiently maintain the equipment accommodated through the opening, it is necessary to arrange the equipment that requires maintenance so that it is exposed through the opening. That is, there is a problem in that there are restrictions on the layout of the equipment.

Further, in the configuration of Patent Document 2, for example, when maintaining the engine, it is necessary to open the entire upper part 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 from each other, it is time consuming to open all the covers, and it is difficult to perform maintenance efficiently. Therefore, there was 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 with excellent maintainability.

According to the aspect of the present invention, a work vehicle having the following configuration is provided. That is, this work vehicle includes a body frame, a hood, and a console. The bonnet opens and closes by rotating about a first axis arranged horizontally in the left and right directions with respect to the body frame. The console is arranged above the hood, and can be rotated relative to the hood to switch between a first position in which the control lever can be operated and a second position in which the control lever is tilted rearward. be. The bonnet opens by rotating backward.

1 is a side view showing the overall configuration of a work vehicle according to an embodiment of the present invention. FIG. 3 is a perspective view showing a hydraulic hose arranged inside the hood to connect to a work operating lever of the console. FIG. 3 is a perspective view showing the hydraulic hose in a different direction from FIG. 2; FIG. 7 is a perspective view showing a state in which the bonnet is opened and the console is in a second attitude.

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing the overall configuration of a turning work vehicle 1 according to an embodiment of the present invention. FIG. 2 is a perspective view showing hydraulic hoses 5L and 5R arranged inside the bonnet 38 for connection 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 direction from FIG. 2. 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 explanation, "front", "rear", "left", and "right" refer to the terms seen from the operator sitting in the driver's seat 39 when the front of the lower traveling structure 11 and the front of the upper rotating structure 12, which will be described later, are aligned. It means front, back, left and right.

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

The lower traveling body 11 includes a pair of left and right crawler traveling devices 21, 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 at various directions and speeds to perform various kinds of traveling such as straight forward or backward movement and steering.

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

The swing 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 swing frame 31 can rotate relative to the lower traveling body 11 by driving a swing motor (not shown). The engine 33 is configured as, for example, a diesel engine, and is arranged at the rear of the swing frame 31. The hydraulic pump unit 34 is driven by the engine 33 and generates the hydraulic pressure necessary for the swing work vehicle 1 to travel and work.

The bonnet 38 covers and protects the upper surface of the engine 33 and the like. As shown in FIG. 2, the rear part of the hood 38 is connected to the swing frame 31 by a hinge part 45 arranged at the rear of the swing frame 31. As shown in FIG.

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 part of the rotating frame 31 using a fixing member (not shown). Each bracket 47 is vertically elongated and fixed to the rear inner wall of the bonnet 38.

Thereby, the bonnet 38 can be rotated with respect to the swing frame 31 about a rotation shaft (first shaft) 71 arranged in the left-right horizontal direction behind the engine 33. Specifically, the bonnet 38 can be turned into an open state by rotating it rearward and upward, and can be brought into a closed state by rotating it in the opposite direction.

The control unit 35 includes various operating members. These operating members include a travel operating lever 36, a work operating lever 37, etc., which are arranged in a pair on the left and right as shown in FIG. In this embodiment, the work operation lever 37 corresponds to the operation lever. The operator can give various instructions to the turning work vehicle 1 by operating the above-mentioned operating members.

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 by expanding and contracting the hydraulic cylinders, the bucket 43 can perform various operations such as digging.

As shown in FIG. 2, a driver's seat 39 on which an operator sits is arranged at the left and right center of the upper surface of the revolving upper structure 12. As shown in FIG. A pair of left and right consoles 52 are arranged so as to sandwich the driver's seat 39 therebetween. However, in FIG. 2, the driver's seat 39 and the console 52 are drawn with chain lines in order to clearly show the hydraulic hoses 5L, 5R, etc., which will be described later. The driver's seat 39 and the console 52 are arranged on the upper surface of the hood 38 of the revolving upper structure 12.

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

The work operation lever 37 is arranged at the upper part of the console 52 and protrudes obliquely forward and upward. By operating the work operation lever 37, the operator can give instructions regarding the operation of the work device 13 or the rotation of the revolving upper structure 12.

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 includes one input port and four output ports. An 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, which will be 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 revolving 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, left and right. 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 between driving and stopping hydraulic actuators included 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 pilot pressure, thereby rotating the upper revolving structure 12 and performing various operations using the working device 13. be able to.

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

Specifically, the console 52 is rotatably supported around a hinge shaft (second shaft) 72 arranged at the rear thereof. By operating the lock lever 56, the operator can switch the console 52 between the normal first posture shown by the solid line in FIG. 1 and the second posture shown by the chain line as shown by the white arrow. I can do it. The first posture is a normal posture when the operator operates the work operation lever 37. The second posture is a posture that is flipped up rearward and upward from the first posture, and is used when the operator temporarily retracts the console 52 rearwardly and upwardly when getting on and off the swinging work vehicle 1.

The direction of rotation when opening the bonnet 38 from the closed state matches the direction of rotation for switching the console 52 from the first attitude to the second attitude. Therefore, when the console 52 is further switched from the first attitude to the second attitude with the bonnet 38 open, the direction of movement of the center of gravity of the entire body including the bonnet 38 and the console 52 is on the open side of the bonnet 38. Therefore, the bonnet 38 can be stably maintained in an open state.

The hydraulic circuit included in the swing 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. Thereby, even if the operator's hand or the like accidentally hits the work operation lever 37 of the console 52 in the second position, it is possible to prevent an unexpected action from occurring. This locking function can be realized, for example, by controlling the remote control valve 62 to cut 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 as a pair 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 will be explained in detail below.

One end of the left hydraulic hose 5L is connected to a remote control valve 62 inside the left console 52. The hydraulic hose 5L curves into 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 unillustrated opening formed on the lower surface of the console 52 and an unillustrated opening 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 obliquely to the right and rear, almost along the ceiling surface of the bonnet 38. The hydraulic hose 5L is bent approximately vertically near the location where the hinge portion 45 is installed, 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-shaped member into a C-shape or a hook shape are fixed to the bracket 47 in a plurality of vertically arranged lines. pass through. Also, during this process, the hydraulic hose 5 passes near the rotating shaft 71.

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

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

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

In this way, 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, a wide space surrounded by the swing frame 31 and the bonnet 38 can be secured. As a result, various devices can be efficiently arranged in the space.

The left and right hydraulic hoses 5L, 5R are wound at a plurality of locations midway in the longitudinal direction with binding bands (fixing members) 7 and fixed to the rotating frame 31, the bonnet 38, or the like. This binding band 7 is also fixed to a portion of the holding member 8 provided on the bracket 47.

When the bonnet 38 is closed as shown in FIGS. 2 and 3, between the fixing point with the holding member 8 near the rotating shaft 71 and the fixing point with the cable tie 7 closest above or below, The hydraulic hoses 5L and 5R are slightly bent and have some slack. By having this bent part, it is possible to secure a stretching allowance for the hydraulic hoses 5L and 5R when opening the bonnet 38 as shown in FIG. 4, and the hydraulic hoses 5L and 5R pull the bonnet 38 and resist the opening operation. can be prevented from becoming.

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 arranged at appropriate positions on the left side surface of the engine 33. An endless belt 79 is wound around the output pulley 76, fan pulley 77, and tension pulley 78. In this embodiment, the bent portion 9 formed on the left hydraulic hose 5L is oriented parallel to the portion of the belt 79 between the output pulley 76 and the tension pulley 78, and the belt 79 includes a portion adjacent to the relevant portion. Thereby, the engine 33 and the hydraulic hose 5L can be arranged in a compact space while preventing the belt 79 from becoming entangled.

As explained above, the swing work vehicle 1 of this embodiment includes the swing frame 31, the hood 38, and the console 52. An engine 33 is arranged on the revolving frame 31. The bonnet 38 is rotatably supported around a rotating shaft 71 arranged at the rear of the engine 33, and opens and closes by rotating with respect to the revolving frame 31. The console 52 is rotatably supported around a hinge shaft 72 arranged above the hood 38, and can be switched between a first attitude and a second attitude by rotating with respect to the hood 38. The console 52 includes a work operation lever 37 that can be operated effectively when in the first attitude and is ineffective when in the second attitude. The direction in which the bonnet 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 and 5R connected to the console 52 are arranged so as to pass near the rotating shaft 71 and the hinge shaft 72, and along the inner wall of the swing frame 31 and the inner wall of the hood 38.

As a result, even if the console 52 is rotated to disable the operation of the work operation lever 37 after the bonnet 38 is opened, the direction of movement of the center of gravity of the entire bonnet 38 and the console 52 is toward the opening side of the bonnet 38. Therefore, the opened bonnet 38 is prevented from being closed unexpectedly, and maintenance work can be performed with peace of mind. Furthermore, since the hydraulic hoses 5L and 5R are located at positions where they are unlikely to interfere with work, maintenance is easy with the bonnet 38 open.

Furthermore, in the swing work vehicle 1 of the present embodiment, the hydraulic hoses 5L and 5R are fixed to the swing 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, the hydraulic hoses 5L and 5R are loose near the rotating shaft 71 between adjacent binding bands 7 or holding members 8.

As a result, it is possible to secure an extension margin for the hydraulic hoses 5L, 5R near the rotating shaft 71 of the bonnet 38, and it is possible to prevent the hydraulic hoses 5L, 5R from pulling the bonnet 38 and becoming a resistance to the opening operation. can. Therefore, the bonnet 38 can be opened smoothly.

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

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

Furthermore, in the turning work vehicle 1 of this embodiment, the engine 33 includes an output pulley 76, a fan pulley 77, and a belt 79. The rotation of the output shaft is output to the output pulley 76 . 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 5L is close to the belt 79 in a parallel direction.

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

Although the preferred embodiments of the present invention have been described above, the above configuration can be modified as follows, for example.

The respective paths of the left and right hydraulic hoses 5L, 5R can be changed as appropriate as long as they pass near the rotating shaft 71 and the hinge shaft 72 and follow the inner walls of the swing frame 31 and the hood 38. Here, the inner wall includes the inner surface of the side wall, the lower surface of the ceiling wall, and the upper surface of the floor wall.

The work operation lever 37 may be configured so that it can be operated only forward and backward or left and right, for example, instead of being configured so that it can be operated back and forth, left and right.

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

The present invention can be applied not only to turning work vehicles but also to work vehicles of various other configurations and uses.

<Additional notes to the invention>
According to the aspect of the present invention, a work vehicle having the following configuration is provided. That is, this work vehicle includes a revolving frame, a hood, a console, and a hydraulic hose. An engine is disposed on the revolving frame. The bonnet is rotatably supported around a first shaft located at the rear of the engine, and opens and closes by rotating with respect to the revolving frame. The console is rotatably supported around a second axis disposed above the hood, and can be switched between a first attitude and a second attitude by rotating with respect to the hood. The hydraulic hose is connected to the console. The console is provided with an operation lever that is operable when the console is in the first attitude and is ineffective when it is in the second attitude. The direction in which the hood is rotated to open the hood is the same as the direction in which the console is rotated to switch from the first position to the second position. The hydraulic hose is arranged along an inner wall of the bonnet and passes near the first axis.

As a result, even if you open the hood and then rotate the console to disable the operation lever, the direction of movement of the center of gravity of the entire hood and console, including the bonnet and console, will be on the opening side of the hood. This prevents the door from closing unexpectedly, allowing maintenance work to be carried out with peace of mind. Furthermore, since the hydraulic hose is located in a position where it does not get in the way of work, maintenance is easy with the bonnet open.

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 bonnet is rotatably supported around a first shaft located at the rear of the engine, and opens and closes by rotating with respect to the revolving frame. The console is rotatably supported around a second axis disposed above the hood, and can be switched between a first attitude and a second attitude by rotating with respect to the hood. The console is provided with an operation lever that is operable when the console is in the first attitude and is ineffective when it is in the second attitude. The direction in which the hood is rotated to open the hood is the same as the direction in which the console is rotated to switch from the first position to the second position.

As a result, even if you open the hood and then rotate the console to disable the operation lever, the direction of movement of the center of gravity of the entire hood and console, including the bonnet and console, will be on the opening side of the hood. This prevents the door from closing unexpectedly, allowing maintenance work to be carried out with peace of mind.

1 Swing work vehicle (work vehicle)
5L, 5R Hydraulic hose 7 Binding band (fixing member)
8 Holding member (fixing member)
31 Swivel frame 33 Engine 37 Work operation lever (operation lever)
38 Bonnet 52 Console 71 Rotation axis (first axis)
72 Hinge axis (second axis)

Claims (4)

fuselage frame,
a bonnet that opens and closes by rotating around a first axis arranged horizontally in the left and right directions with respect to the aircraft frame;
a console that is arranged above the hood and can be switched between a first position in which the control lever can be operated and a second position in which the control lever is tilted rearward by rotating with respect to the hood; Prepare,
The bonnet opens by rotating backward;
work vehicle. When the console is in the second attitude, operation of the operating lever is disabled.
The work vehicle according to claim 1. A second shaft rotatably supporting the console with respect to the bonnet moves in front and behind the first shaft as the bonnet is opened and closed.
The work vehicle according to claim 1 or 2. The console separates from the travel control lever when the hood opens;
The work vehicle according to any one of claims 1 to 3.