WO2014034438A1

WO2014034438A1 - Construction machine

Info

Publication number: WO2014034438A1
Application number: PCT/JP2013/071977
Authority: WO
Inventors: 岡本　昌也; 隆行小河原; 伸一久松; 剛植木; 秀文平松
Original assignee: 日立建機株式会社
Priority date: 2012-08-31
Filing date: 2013-08-15
Publication date: 2014-03-06
Also published as: JPWO2014034438A1; JP5771749B2

Abstract

A rotating frame (15) is provided with: a center frame (16) which comprises a bottom plate (16A), a left vertical plate (16B), and a right vertical plate (16C); a support base plate (18) which is located on the front side of the center frame (16) and which is provided between the bottom plate (16A) and a right side frame (17); and a pedestal member (22) which is provided on the support base plate (18). The pedestal member (22) is provided with a control valve unit mounting bracket (24) to which a control valve unit (27) is mounted. As a result of this configuration, a housing space (23) can be formed between the support base plate (18) and the pedestal member (22), and an electrical harness (29) which is connected to a solenoid valve (28) can be housed within the housing space (23).

Description

Construction machinery

The present invention relates to a construction machine such as a hydraulic shovel and a wheel type hydraulic shovel, and more particularly to a construction machine in which a control valve unit and a solenoid valve are disposed on the front right side of a swing frame.

Generally, a construction machine such as a hydraulic shovel or a wheel type hydraulic shovel is composed of a self-propelled lower traveling body and an upper revolving body rotatably mounted on the lower traveling body, and a front portion of the upper revolving body On the side, a working device for carrying out a digging operation and the like is provided so as to be capable of raising and lowering. This construction machine self-travels to the work site, and then performs excavation work of soil and the like using a work device.

Here, in the construction machine, a traveling hydraulic motor for driving the crawler or the wheel, a turning hydraulic motor for turning the upper swing body, a hydraulic actuator such as a hydraulic cylinder for driving the boom, arm or bucket constituting the working device A hydraulic pump that discharges pressure oil toward each of the hydraulic actuators, and an operation lever device operated by an operator to drive the hydraulic actuators are mounted (see Patent Document 1).

Japanese Patent Application Laid-Open No. 11-343640

By the way, the construction machine is usually provided with a control valve unit and a solenoid valve for controlling supply and discharge of pressure oil from the hydraulic pump to various hydraulic actuators. Then, one or more hydraulic actuators among the traveling hydraulic motor, the turning hydraulic motor, the boom cylinder, the arm cylinder, and the bucket cylinder are selected by the operation lever device. A pilot signal is output from the control lever device to the direction control valve of the selected hydraulic actuator, and the selected hydraulic actuator can be operated according to the operation of the control lever device.

On the other hand, in the case of a wheel type hydraulic shovel in which a lower traveling body is provided with wheels (a wheel) for traveling on a public road, or a small turning rear type hydraulic shovel, the counterweight is reduced in order to keep the turning radius of the upper turning body small. It is disposed close to the center of rotation of the upper swing body. Therefore, in the wheeled hydraulic excavator and the rear small turning hydraulic excavator, the housing space for the devices formed on the front side of the engine is narrow. For this reason, in a wheeled hydraulic shovel and a small swing rear hydraulic shovel, a control valve unit and an electromagnetic valve are disposed on the front right side of the swing frame.

In this case, the control valve unit is usually attached to a portion of the swing frame that supports the control valve unit via a mounting bracket, and a large number of hydraulic pipes and hydraulic hoses are connected to the control valve unit. For this reason, the mounting bracket becomes a hindrance around the control valve unit in the swing frame, and it becomes difficult to arrange the components. As a result, there is a problem that it is difficult to secure a space for accommodating the electric harness connected to the solenoid valve around the control valve unit.

The present invention has been made in view of the above-described problems of the prior art, and provides a construction machine capable of securing a space for accommodating an electric harness connected to a solenoid valve around a control valve unit. It is an object.

(1). The present invention comprises a self-propelled lower traveling body and an upper revolving body pivotally mounted on the lower traveling body and provided with a working device on the front side, the upper revolving body comprising a support structure A pivot frame, a motor provided on the rear side of the pivot frame, a hydraulic pump driven by the motor to discharge hydraulic fluid toward the hydraulic actuator, and a cab provided on the front left side of the pivot frame Applied to a construction machine provided with a cab defining the above, a control valve unit provided on the front right side of the swing frame and controlling supply and discharge of pressure oil from the hydraulic pump to the hydraulic actuator, and a solenoid valve .

A feature of the present invention is that the pivot frame includes a center frame including a bottom plate and left and right vertical plates extending vertically on the bottom plate, and a left frame disposed on the left side of the center frame. A side frame and a right side frame disposed on the right side, a support substrate provided on the front side of the center frame and provided between the bottom plate and the right side frame, and provided on the support substrate A pedestal member forming an accommodation space of an electric harness connected to the electromagnetic valve between the support substrate and a control valve unit mounting bracket provided on the pedestal member and to which the control valve unit is attached is there.

According to this configuration, it is possible to secure a storage space extending in the front and rear directions by the base member between the support substrate of the swing frame and the control valve unit mounting bracket to which the control valve unit is attached. Thus, even if, for example, a large number of hydraulic hoses are arranged around the control valve unit, the electric harness connected to the solenoid valve is accommodated in the housing space formed below the control valve unit mounting bracket by the pedestal member. It can be housed. Therefore, interference between a large number of hydraulic hoses connected to the control valve unit and the electric harness connected to the solenoid valve can be suppressed, and the workability at the time of arranging the electric harness can be enhanced.

(2). According to the present invention, the bottom plate of the center frame is provided with a rising plate extending forward along the right side surface of the right vertical plate to the same position as the front end of the right side frame; The housing space is formed as a space surrounded by the pedestal member at a corner where the support substrate and the riser intersect, and the electric harness is configured to be fixed at the corner with the riser. According to another aspect of the present invention, there is provided a structure extending in the front and back direction along the accommodation space.

According to this configuration, the base member can be disposed along the corner where the support substrate and the riser plate meet, and the electric harness can be extended forward and backward along the housing space surrounded by the base member. . Therefore, the electric harness connected to the solenoid valve can be compactly arranged by utilizing the corner portion where the support substrate and the riser plate intersect, and the hydraulic hose and the like disposed around the control valve unit Interference with the electrical harness can be reliably suppressed.

(3). According to the present invention, the pedestal member is a side plate portion whose lower end is fixed to the upper surface of the support substrate in a state where the pedestal member faces left and right with a gap in the left and right directions, and the riser plate from the upper end side of the side plate portion The upper plate portion is formed in a L-shape in cross section by the upper plate portion bent toward the upper surface portion, and the upper plate portion is to constitute a bracket mounting surface for mounting the control valve unit mounting bracket.

According to this configuration, the control valve unit mounting bracket can be attached to the bracket mounting surface of the base member, and the control valve unit can be attached to the control valve unit mounting bracket. Thus, by arranging the control valve unit above the accommodation space of the electric harness, a small space can be effectively used, and when arranging the control valve unit, the solenoid valve, etc. on the front right side of the revolving frame Can increase the freedom of layout.

(4). According to the present invention, the right vertical plate constituting the swing frame is provided with a harness insertion hole penetrating in the left and right directions at the front position thereof, and the electric harness passes from the cab through the harness insertion hole It is in having set it as the structure which reaches the said accommodation space.

According to this configuration, by inserting the electric harness into the harness insertion hole provided in the right vertical plate, the length of the electric harness from the cab to the storage space can be shortened, and the entire electric harness can be shortened. Can.

(5). According to the present invention, the bottom plate of the center frame is provided with a rising plate extending forward along the right side surface of the right vertical plate to the same position as the front end of the right side frame; A front plate extending left and right is provided between the front end of the plate, the solenoid valve is attached to the front plate, and the electric harness is connected to the solenoid valve.

According to this configuration, by attaching the solenoid valve to the front plate provided between the front end of the right side frame and the front end of the rising plate, the electromagnetic valve is provided on the front side of the control valve unit and the hydraulic hoses disposed around it. The valve can be arranged, and a space for connecting the electric harness can be secured around the solenoid valve.

(6). According to the present invention, the control substrate faces the control valve unit mounting bracket at intervals in the left and right directions, and another control valve unit whose upper surface is flush with the upper surface of the control valve unit mounting bracket A mounting bracket is provided, and the control valve unit is mounted on the upper surface of the control valve unit mounting bracket and the upper surface of the other control valve unit mounting bracket.

According to this configuration, even when the control valve unit mounting bracket is provided on the base member, the upper surface of the control valve unit mounting bracket and the upper surfaces of the other control valve unit mounting brackets form the same plane. The control valve unit can be stably mounted on the upper surfaces of the two control valve unit mounting brackets.

1 is a front view showing a wheeled hydraulic excavator according to an embodiment of the present invention. It is a top view which shows the upper revolving superstructure of a wheel type hydraulic shovel in the state where work equipment was removed. It is a top view which expands and shows the front right side of a turning frame. It is the top view of the principal part expansion which shows the state which has arrange | positioned the control valve unit, the solenoid valve, the electric harness, etc. in the front right position of the turning frame. FIG. 5 is a cross-sectional view of the swing frame, the base member, the control valve unit, the solenoid valve, the electric harness, and the like as viewed in the direction of arrows VV in FIG. 4; FIG. 5 is a cross-sectional view of a pivoting frame, a base member, a control valve unit, an electric harness and the like as viewed in the direction of arrows VI-VI in FIG. 4; It is a perspective view showing a revolving frame, a pedestal member, a control valve unit mounting bracket, an electric harness, and the like. It is a disassembled perspective view of the position similar to FIG. 7 which shows the state which removed the base member and control valve unit attachment bracket from the turning flame | frame.

Hereinafter, the embodiment of the construction machine according to the present invention will be described in detail with reference to FIGS. 1 to 8 by taking a case where the invention is applied to a wheeled hydraulic excavator as an example.

In the figure, 1 shows a wheel type hydraulic shovel as a construction machine. The wheeled hydraulic excavator 1 includes a wheeled lower traveling body 2 having left and right front wheels 2A and left and right rear wheels 2B, and an upper revolving structure 3 rotatably mounted on the lower traveling body 2. And consists of. A working device 4 is provided on the front side of the upper swing body 3 so as to be capable of raising and lowering. The wheeled hydraulic excavator 1 travels on a public road by the lower traveling body 2 and performs excavating work and the like of earth and sand using the work device 4 while turning the upper swing body 3 at the work site.

Here, the upper swing body 3 is configured to include a swing frame 15, which will be described later, a counterweight 5, an engine 6 as a prime mover, a hydraulic pump 8, a cab 9, a control valve unit 27, and an electromagnetic valve 28. It is done.

The counterweight 5 is mounted on the rear end side of the swing frame 15, and the counterweight 5 balances the weight with the work device 4. Here, since the wheeled hydraulic excavator 1 travels on a public road, it is desirable to make the turning radius of the upper swing body 3, that is, the distance from the swing center of the upper swing body 3 to the rear surface of the counterweight 5 as small as possible. For this reason, the counterweight 5 is disposed at a position close to the turning center of the upper swing body 3.

The reference numeral 6 denotes an engine as a prime mover which is located on the front side of the counterweight 5 and mounted on the rear side of the swing frame 15. The engine 6 is disposed in a horizontal position in which the axis of a crankshaft (not shown) extends leftward and rightward. A heat exchange device 7 including a radiator, an oil cooler, and the like is disposed on the left side of the engine 6, and a hydraulic pump 8 is disposed on the right side of the engine 6.

The hydraulic pump 8 is driven by the engine 6 so that various hydraulic actuators mounted on the wheeled hydraulic shovel 1, that is, a boom cylinder 4A, an arm cylinder, a bucket cylinder, and a lower traveling body provided in the working device 4 The pressure oil is discharged to a traveling hydraulic motor provided at 2 and a turning hydraulic motor (not shown) provided at the upper swing body 3.

Reference numeral 9 denotes a cab disposed on the front left side of the turning frame 15. The cab 9 defines an operator's cab. In the cab 9, a driver's seat on which the operator is seated, a steering wheel for steering the front wheel 2A of the lower traveling body 2, a control lever device for operating the turning operation of the upper swing body 3 and the digging operation by the work device 4 Etc (all not shown) are provided.

The building cover 10 is disposed on the front side of the counterweight 5, and the building cover 10 covers mounted devices such as the engine 6, the heat exchange device 7, the hydraulic pump 8, and the like. Here, the building cover 10 covers an upper surface cover 10A covering the mounting device from above, an engine cover 10B provided openably and closably on the upper surface cover 10A, and covers the mounting device openably and closably from the left side It comprises a left side door cover 10C and a right side door cover 10D which covers the mounted device so that it can be opened and closed from the right side.

The hydraulic oil tank 11 is located on the right front side of the building cover 10 and mounted on the swing frame 15, and the hydraulic oil tank 11 supplies hydraulic oil supplied to various hydraulic actuators mounted on the wheeled hydraulic excavator 1 It will be stored. The fuel tank 12 is located on the front side of the hydraulic oil tank 11 and mounted on the swing frame 15. The fuel tank 12 is for storing the fuel supplied to the engine 6.

The right front building cover 13 is disposed on the right side of the working device 4, and the right front building cover 13 is provided on the swing frame 15 adjacent to the front side of the fuel tank 12. The right front building cover 13 forms an equipment storage room 14 therein. In the device storage chamber 14, various components including a control valve unit 27, each solenoid valve 28, and maintenance equipment described later are stored.

Next, the swing frame 15 which forms the support structure of the upper swing body 3 will be described.

That is, reference numeral 15 denotes a pivoting frame which is a base of the upper pivoting body 3, and the pivoting frame 15 forms a rigid support structure. Here, as shown in FIGS. 3 and 8, the pivot frame 15 is disposed at the center in the left and right directions and extends in the front and rear directions, and the center frame 16 is disposed on the left of the center frame 16 and is front and rear. It includes a left side frame (not shown) extending in the direction, and a right side frame 17 disposed on the right side of the center frame 16 and extending in the front and rear directions.

The center frame 16 is a flat bottom plate 16A formed of a thick steel plate or the like, and a left vertical plate 16B erected on the bottom plate 16A and extending in the front and rear directions while facing in the left and right directions. And a right vertical plate 16C. At the front end sides of the left vertical plate 16B and the right vertical plate 16C, the base end (boom foot portion) of the working device 4 and the bottom side of the boom cylinder 4A are respectively rotated via connection pins (not shown) It is configured to be pin-coupled as possible.

As shown in FIG. 4, FIG. 5 and FIG. 8, a harness insertion hole 16D penetrating in the left and right directions is bored in the lower end portion of the front portion of the right vertical plate 16C. Thereby, the electric harness 29 connecting between the controller (not shown) provided on the cab 9 side and the respective solenoid valves 28 described later passes from the cab 9 side through the harness insertion hole 16D of the right vertical plate 16C. It is guided into the equipment storage room 14.

Reference numeral 18 denotes a support substrate located on the front side of the center frame 16 and provided between the bottom plate 16A and the right side frame 17. The support substrate 18 constitutes a bottom surface of the device housing chamber 14 and supports the control valve unit 27 via a left mounting bracket 24 and a right mounting bracket 26 described later. Here, the support substrate 18 is formed of a substantially rectangular flat plate which is thinner than the bottom plate 16A and extends in the front and rear directions, and the front end portion thereof extends to the same position as the front end of the right side frame 17. Further, the support substrate 18 is fixed to the right end edge of the bottom plate 16A and the left side surface of the right side frame 17 by means of welding or the like.

The reference numeral 19 denotes a rising plate provided on the right front end side of the bottom plate 16A that constitutes the center frame 16. The rising plate 19 is formed by bending a rectangular flat plate extending in the front and rear directions into an inverted L shape, and the rising plate 19 extends along the right side surface 16C1 of the right vertical plate 16C that constitutes the center frame 16. And extends forward to the same position as the front end of the right side frame 17. That is, the rising plate 19 is formed in an inverted L shape by a flat plate portion 19A extending in the front and rear directions and a bent portion 19B bent from the rear end of the flat plate portion 19A toward the right vertical plate 16C. ing.

Here, the lower end of the rising plate 19 is fixed to the upper surface of the bottom plate 16A by means of welding or the like, and the bent portion 19B of the rising plate 19 is by means of welding or the like on the right side surface 16C1 of the right vertical plate 16C. It is fixed. Thus, as shown in FIGS. 6 and 8, the flat plate portion 19A of the rising plate 19 rises from the upper surface of the bottom plate 16A and extends in the front and rear direction while facing the right vertical plate 16C at a constant distance to the right. ing. Further, the front end of the riser 19 projects forward from the front end of the bottom plate 16A and extends to the same position as the front end of the right side frame 17.

Reference numeral 20 denotes a front plate which is provided between the front end of the right side frame 17 and the front end of the riser 19 and extends in the left and right directions therebetween. Here, the right end side of the front plate 20 is a step portion 20A horizontally projecting forward from the front end of the right side frame 17, and the step portion 20A is a scaffold when the operator ascends on the front right building cover 13. Are configured. On the other hand, a solenoid valve mounting base 21 is provided at an intermediate portion in the left and right directions of the front plate 20, and each solenoid valve 28 described later is mounted on the solenoid valve mounting base 21.

Next, the pedestal member 22, the left mounting bracket 24, the right mounting bracket 26, etc. used in the present embodiment will be described.

Reference numeral 22 denotes a base member for supporting a control valve unit 27 described later. The base member 22 is provided in the vicinity of the right vertical plate 16C and is provided on the support substrate 18 so as to extend forward and backward. The pedestal member 22 forms an accommodation space 23 of an electric harness 29 described later at a corner where the support substrate 18 and the rising plate 19 intersect. Here, as shown in FIGS. 7 and 8, the base member 22 is formed of a plate that is bent in an L shape and extends in the front and rear directions. That is, the pedestal member 22 faces the flat plate portion 19A of the rising plate 19 with a gap in the left and right directions at a distance, and a pair of side plate portions 22A spaced apart front and rear, and the flat plate portion 19A of the rising plate 19 from the upper end side of the side plate portion 22A. It is bent to the side, and it is comprised by the upper board part 22B facing the support substrate 18 and the space in the upper and lower directions at intervals.

Here, the lower end of the side plate portion 22A is fixed to the upper surface of the support substrate 18 using, for example, means such as bolt fastening and welding, and the left end of the upper plate portion 22B is fixed to the flat plate portion 19A of the rising plate 19 here. It adheres using means, such as welding. Further, an opening 22C for working when the electric harness 29 described later is arranged is formed in the front and rear middle portions of the side plate portion 22A. On the other hand, the upper surface of the upper plate portion 22B is a bracket mounting surface 22D to which the left side mounting bracket 24 described later is attached, and screw seats 22E made of welding nuts are provided on both front and rear end sides of the upper plate portion 22B. It is done. Although the case where the opening 22C is provided in the side plate 22A is illustrated, the side plate 22A may be a side plate not having the opening 22C. On the other hand, the side plate portion 22A may have a plate shape of three divisions having two openings 22C.

Reference numeral 23 denotes a housing space for housing an electric harness 29 described later, and the housing space 23 is formed as a space surrounded by the pedestal member 22 at a corner corner where the support substrate 18 and the rising plate 19 intersect. There is. The housing space 23 is formed to extend in the front and rear directions along the flat plate portion 19A of the riser 19. Therefore, the electric harness 29 is disposed along the housing space 23.

Reference numeral 24 denotes a control valve unit mounting bracket (hereinafter referred to as a left side mounting bracket) attached to the pedestal member 22. The left side mounting bracket 24 is a side to which a control valve unit 27 described later is attached. Here, the left mounting bracket 24 comprises a lower plate 24A made of a rectangular flat plate extending in the front and rear directions, and a leg 24B whose lower end is fixed to the lower plate 24A and whose upward cross section has a U shape. A flat plate-like upper plate 24C is provided on the upper end side of the leg portion 24B and extends in the front and rear direction. Although the leg 24B is illustrated to have a U-shaped cross section, the shape of the leg may be any shape that can support the control valve unit 27, for example, a box or the like It may be a shape.

On the other hand, lower bolt insertion holes 24D are respectively drilled on both ends in the front and rear directions of the lower plate 24A, and upper bolt insertion holes 24E are respectively drilled on both ends in the front and rear direction of the upper plate 24C. It is set up. Then, the bolt 25 is inserted into the lower bolt insertion hole 24D of the lower plate 24A, and the bolt 25 is screwed to the screw seat 22E of the upper plate portion 22B that constitutes the pedestal member 22. The left mounting bracket 24 is mounted on the mounting surface 22D.

The reference numeral 26 denotes another control valve unit mounting bracket (hereinafter referred to as a right mounting bracket) provided on the support base 18 in a state of facing the left mounting bracket 24 with a gap in the left and right directions. The right side mounting bracket 26 is paired with the left side mounting bracket 24 in the left and right directions, and a control valve unit 27 described later is mounted. Here, the right side mounting bracket 26 is fixed to the lower plate 26A fixed to the support substrate 18 by means of, for example, welding, bolt fastening, etc. It comprises a pair of legs 26B which rise upward, and a flat plate-like upper plate 26C provided on the upper end side of the legs 26B and extending in the front and rear direction.

In this case, the left mounting bracket 24 is mounted on the pedestal member 22. Accordingly, the upper and lower length dimensions of the leg portion 26B of the right side mounting bracket 26 are set larger than the upper and lower length dimensions of the leg portion 24B of the left side mounting bracket 24. The upper surface 26C1 of the upper plate 26C and the upper surface 24C1 of the upper plate 24C of the left mounting bracket 24 form the same plane in the horizontal direction. Further, bolt insertion holes 26D are respectively bored in the front and rear ends of the upper plate 26C of the right side mounting bracket 26.

Reference numeral 27 denotes a control valve unit disposed in the equipment storage chamber 14 formed inside the right front building cover 13. The control valve unit 27 is attached to the left mounting bracket 24 and the right mounting bracket 26 provided on the support substrate 18 of the turning frame 15. Here, the control valve unit 27 is formed as a substantially rectangular block body and is integrally connected with two

valve casings

27A and 27B using bolts or the like, and the

respective valve casings

27A and 27B. It consists of an assembly of a plurality of directional control valves incorporated. One valve casing 27A is attached to the upper plate 24C of the left mounting bracket 24 using a bolt or the like (not shown). The other valve casing 27B is attached to the top plate 26C of the right side mounting bracket 26 using a bolt or the like (not shown).

On the other hand, the directional control valves incorporated in the

valve casings

27A and 27B include, for example, directional control valves for left and right traveling motors (not shown) and directional control valves for a swing motor (not shown); It comprises a directional control valve for the boom cylinder 4A, a directional control valve for the arm cylinder (not shown), and a directional control valve for the bucket cylinder (not shown).

The direction control valve for the traveling motor controls the direction of the pressure oil supplied to the left and right traveling motors provided on the lower traveling body 2, and the direction control valve for the turning motor turns the upper swing body 3 Control the direction of the pressure oil supplied to the turning motor. The direction control valve for the boom cylinder 4A controls the direction of the pressure oil supplied to the boom cylinder 4A of the working device 4, and the direction control valve for the arm cylinder is the pressure oil supplied to the arm cylinder of the working device 4 The direction control valve for the bucket cylinder controls the direction of the pressure oil supplied to the bucket cylinder of the working device 4. The hydraulic pilot portion of each directional control valve is selectively supplied with a pilot signal according to the operation of an operation lever device (not shown) disposed in the cab 9. As a result, pressure oil from the hydraulic pump 8 is selectively supplied to a selected hydraulic actuator among the traveling motor, the swing motor, the boom cylinder 4A, the arm cylinder, and the bucket cylinder.

Reference numeral 28 denotes a plurality of solenoid valves disposed in the equipment chamber 14 together with the control valve unit 27. As shown in FIGS. 4 and 5, each solenoid valve 28 is disposed on the front side of the control valve unit 27 and a bolt or the like is mounted on the solenoid valve mounting base 21 provided on the front plate 20 of the turning frame 15. It is attached in a state of being stacked up and down using.

Reference numeral 29 denotes an electric harness connected to each solenoid valve 28. The electric harness 29 is formed by bundling a plurality of electric wires 29A. Here, one end side of the electric harness 29 is connected to a controller (not shown) disposed in the cab 9. A midway portion of the electric harness 29 reaches the housing space 23 through the harness insertion hole 16D of the right vertical plate 16C. Furthermore, the other end side of the electric harness 29 is connected to each solenoid valve 28 respectively.

Here, the solenoid valve 28 controls, for example, an arm regeneration valve (not shown) based on a control signal output from a controller (not shown) through the electric harness 29. The arm regeneration valve controls the supply of return oil discharged from one of the rod-side oil chamber and the bottom-side oil chamber of the arm cylinder to the other oil chamber, and has a function to accelerate the operation of the arm. doing. The return oil regeneration of the arm cylinder using a solenoid valve is described, for example, in JP-A-2000-110803.

On the other hand, in addition to controlling the arm regeneration valve, the solenoid valve 28 controls, for example, switching the traveling motor to high speed and low speed, or locks a cylinder (not shown) that supports the left and right front wheels 2A for suspension. It can be used for control to switch to the non-locked state. That is, the solenoid valve 28 controls supply and discharge of pressure oil to various hydraulic actuators such as an arm cylinder and a traveling motor.

Thus, the electrical harness 29 connects between the controller disposed in the cab 9 located on the front left side of the upper swing body 3 and each solenoid valve 28 located on the front right side of the upper swing body 3 Do. Therefore, after crossing the center frame 16 through the harness insertion holes 16D bored in the left and right

vertical plates

16B and 16C of the turning frame 15, the electric harness 29 passes through the harness insertion holes 16D of the right vertical plate 16C. It is led into the equipment storage room 14.

In this case, in the present embodiment, the pedestal member 22 is provided between the rising plate 19 erected on the bottom plate 16A of the center frame 16 and the support substrate 18. Thus, the accommodation space 23 is formed as a space surrounded by the pedestal member 22 at the corner where the support substrate 18 and the rising plate 19 intersect, and the accommodation space 23 is on the lower side of the control valve unit 27. It is formed extending in the front and back direction to each solenoid valve 28 through. Then, the electric harness 29 is guided to the respective solenoid valves 28 through the accommodation space 23. Thereby, even if a large number of hydraulic hoses are arranged around the control valve unit 27, the electrical harness 29 guided into the equipment storage chamber 14 is accommodated in the accommodation space 23 formed by the pedestal member 22. Thus, the electromagnetic valves 28 can be led to the electromagnetic valves 28 without interfering with the hydraulic hoses.

The wheeled hydraulic excavator 1 according to the present embodiment has the above-described configuration, and the wheeled hydraulic excavator 1 operates the work site by driving the front wheel 2A and the rear wheel 2B provided on the lower traveling body 2. Drive on the public road towards Then, the wheeled hydraulic excavator 1 performs excavation work and the like of earth and sand using the work device 4 while turning the upper swing body 3 at the work site.

Here, in the wheeled hydraulic excavator 1 according to the present embodiment, the pedestal member 22 is provided on the support substrate 18 provided between the bottom plate 16A of the center frame 16 and the right side frame 17 of the swing frame 15. It has composition.

As a result, between the left mounting bracket 24 to which the control valve unit 27 is attached and the support substrate 18, the seat member 22 can secure the housing space 23 extending in the front and rear directions. Thus, even if, for example, a large number of hydraulic hoses (not shown) are arranged around control valve unit 27, the distance between the controller (not shown) arranged in cab 9 and each solenoid valve 28 is The electric harness 29 to be connected can be accommodated in the accommodation space 23. As a result, interference between a large number of hydraulic hoses connected to the control valve unit 27 and the electric harness 29 connected to each solenoid valve 28 can be suppressed, and the work when wiring the electric harness 29 Can be enhanced.

In this case, the base member 22 is fixed to the rising plate 19 erected on the bottom plate 16A of the center frame 16 and the support substrate 18, and the housing space 23 is a corner corner where the support substrate 18 and the rising plate 19 intersect. And is formed as a space surrounded by the pedestal member 22. As a result, the electric harness 29 connected to each solenoid valve 28 can be compactly arranged by utilizing the corner portion where the support substrate 18 and the rising plate 19 intersect. Therefore, interference between the hydraulic hose and the like disposed around the control valve unit 27 and the electric harness 29 can be reliably suppressed.

Moreover, the base member 22 has a side plate portion 22A whose lower end portion is fixed to the support substrate 18 and faces the rising plate 19 at a distance, and an upper plate portion bent toward the rising plate 19 from the upper end side of the side plate portion 22A. The upper plate portion 22B forms a bracket mounting surface 22D to which the left mounting bracket 24 is attached.

Thus, the left mounting bracket 24 can be mounted on the bracket mounting surface 22D of the base member 22, and the control valve unit 27 can be mounted on the upper plate 24C of the left mounting bracket 24. As described above, since the control valve unit 27 can be disposed above the accommodation space 23 of the electric harness 29, a small space in the equipment accommodation chamber 14 can be effectively used. As a result, the degree of freedom in layout when arranging various control devices including the control valve unit 27 and the solenoid valve 28 on the front right side of the swing frame 15 can be enhanced.

Moreover, a harness insertion hole 16D penetrating in the left and right directions is bored in the lower end portion of the front portion of the right vertical plate 16C constituting the turning frame 15. Thereby, the electric harness 29 is led from the cab 9 side to the accommodation space 23 through the harness insertion hole 16D of the right vertical plate 16C, so the length of the electric harness 29 from the cab 9 to the accommodation space 23 is shortened. As a result, the entire electric harness 29 can be shortened.

Furthermore, a front plate 20 is provided between the front end of the right side frame 17 and the front end of the rising plate 19, and the solenoid valve 28 is attached to the front plate 20 to make the control valve unit 27 and hydraulic hoses disposed around it. The solenoid valve 28 can be disposed on the front side of the class. As a result, a large space can be secured around the solenoid valve 28, and the workability when connecting the electric harness 29 to the solenoid valve 28 can be enhanced.

Furthermore, on the supporting substrate 18, the left mounting bracket 24 is provided via the pedestal member 22, and the right mounting bracket 26 facing the left mounting bracket 24 in the left and right directions is provided. The upper surface 24C1 of the upper plate 24C of the left mounting bracket 24 and the upper surface 26C1 of the upper plate 26C of the right mounting bracket 26 form the same plane in the horizontal direction.

Thus, even when the left mounting bracket 24 is provided on the base member 22, the control valve unit 27 can be stably attached to the upper surface 24C1 of the left mounting bracket 24 and the upper surface 26C1 of the right mounting bracket 26. it can.

In the embodiment described above, the base member 22 is fixed to the support substrate 18 and the rising plate 19 so that the support substrate 18 and the rising plate 19 extend in the front and back directions at the corner portions where they intersect. The case where the accommodation space 23 of the electric harness 29 is formed is illustrated. However, the present invention is not limited to this, and the rising plate 19 may be eliminated. In this case, the base member 22 is fixed to the support substrate 18 and the right side surface 16C1 of the right vertical plate 16C of the center frame 16, and the housing space 23 of the electric harness 29 is the right side surface of the support substrate 18 and the right vertical plate 16C. The space may be formed as a space surrounded by the pedestal member 22 so as to be located at a corner where the 16C1 intersects.

Further, in the embodiment described above, the wheel type hydraulic shovel 1 including the front wheel 2A and the rear wheel 2B as a construction machine is described as an example. However, the present invention is not limited to this, and can be widely applied to other construction machines including, for example, a hydraulic shovel provided with a crawler type lower traveling body.

One-wheel hydraulic excavator (construction machine)
2 lower traveling body 3 upper revolving unit 4 working device 6 engine (motor)
DESCRIPTION OF SYMBOLS 8 Hydraulic pump 9 Cab 15 Swivel frame 16 Center frame 16A Bottom plate 16B Left vertical plate 16C Right vertical plate 17 Right side frame 18 Support board 19 Rising plate 22 Pedestal member 22A Side plate portion 22B Upper plate portion 23 Housing space 24 Left mounting bracket (control Valve unit mounting bracket)
24C1, 26C1 Upper surface 26 Right mounting bracket (other control valve unit mounting bracket)
27 Control valve unit 28 Solenoid valve 29 Electric harness

Claims

A self-propelled lower traveling body (2) and an upper revolving body (3) rotatably mounted on the lower traveling body (2) and provided with a working device (4) on the front side,
The upper swing body (3) is
A pivoting frame (15) forming a support structure;
A motor (6) provided on the rear side of the swing frame (15);
A hydraulic pump (8) driven by the prime mover (6) and discharging pressurized oil toward the hydraulic actuator;
A cab (9) provided on the front left side of the swing frame (15) to define a cab;
Construction comprising a control valve unit (27) and a solenoid valve (28) provided on the front right side of the swing frame (15) to control the supply and discharge of pressure oil from the hydraulic pump (8) to the hydraulic actuator In the machine
The pivoting frame (15) is
A center frame (16) comprising a bottom plate (16A) and a left vertical plate (16B) and a right vertical plate (16C) standing on the bottom plate (16A) and extending forward and backward;
A left side frame disposed on the left side of the center frame (16) and a right side frame (17) disposed on the right side;
A support substrate (18) located on the front side of the center frame (16) and provided between the bottom plate (16A) and the right side frame (17);
A pedestal member (22) which is provided on the support substrate (18) and which forms a housing space (23) of the electric harness (29) connected to the solenoid valve (28) between the support substrate (18) and ,
A construction machine characterized by comprising a control valve unit mounting bracket (24) provided on the pedestal member (22) and to which the control valve unit (27) is attached.
The bottom plate (16A) of the center frame (16) is a rising plate (19) extending forward along the right side surface (16C1) of the right vertical plate (16C) to the same position as the front end of the right side frame (17). )),
The pedestal member (22) is configured to be positioned and fixed at a corner of the support substrate (18) and the rising plate (19),
The accommodation space (23) is formed as a space surrounded by the pedestal member (22) at the corner where the support substrate (18) and the rising plate (19) intersect.
The construction machine according to claim 1, wherein the electric harness (29) extends forward and backward along the accommodation space (23).
A side plate portion (22A) whose lower end is fixed to the upper surface of the support substrate (18) in a state where the pedestal member (22) faces the rising plate (19) with an interval in the left and right directions; (22A) and is formed into an L-shaped cross section by an upper plate portion (22B) bent toward the rising plate (19) from the upper end side of the (22A),
The construction machine according to claim 2, wherein the upper plate portion (22B) forms a bracket mounting surface (22D) for mounting the control valve unit mounting bracket (24).
The right vertical plate (16C) constituting the swing frame (15) is provided with a harness insertion hole (16D) penetrating in the left and right directions at its front position,
The construction machine according to claim 1, wherein the electric harness (29) extends from the cab (9) through the harness insertion hole (16D) to the storage space (23).
The bottom plate (16A) of the center frame (16) is a rising plate (19) extending forward along the right side surface (16C1) of the right vertical plate (16C) to the same position as the front end of the right side frame (17). )),
Between the front end of the right side frame (17) and the front end of the riser (19), a front plate (20) extending in the left and right directions is provided.
The solenoid valve (28) is attached to the front plate (20);
The construction machine according to claim 1, wherein the electric harness (29) is configured to be connected to the solenoid valve (28).
The support substrate (18) faces the control valve unit mounting bracket (24) at an interval in the left and right directions, and its upper surface (26C1) is the upper surface (24C1) of the control valve unit mounting bracket (24) Provide another control valve unit mounting bracket (26) that forms the same plane,
The control valve unit (27) is configured to be attached to the upper surface (24C1) of the control valve unit mounting bracket (24) and the upper surface (26C1) of the other control valve unit mounting bracket (26). Construction machine described.