CN107075836B - Construction machine - Google Patents

Abstract

The construction machine is provided with a vehicle body frame (31) and an electrical equipment unit (5), wherein the vehicle body frame (31) is provided with a support frame (315) for supporting the driving platform in a shaft manner, and at least one part of the electrical equipment unit (5) is accommodated in a space (S) surrounded by the support frame (315).

Description

Construction machine

Technical Field

The present invention relates to a construction machine.

Background

Conventionally, a construction machine configured such that a cab is tiltable with respect to a vehicle body frame is known (for example, see patent document 1).

In such a construction machine, a structure is known that houses a structure in which a plurality of electric devices are integrated and unitized (for example, see patent document 2).

Documents of the prior art

Patent document

Patent document 1: japanese unexamined patent application publication No. 2008-303566

Patent document 2: japanese unexamined patent publication No. 2007-296989

Disclosure of Invention

Technical problem to be solved by the invention

Among the electric devices of construction machines, there are electric devices mounted on a vehicle body frame for reasons such as functions, wiring, and the like.

However, since a large-sized device such as an engine and a fuel tank is mounted on the vehicle body frame, there is a problem that the space for disposing the electric equipment is insufficient.

An object of the present invention is to provide a construction machine that can effectively utilize the space of a vehicle body frame and ensure the arrangement space of electrical equipment on the vehicle body frame.

Means for solving the problems

The construction machine according to the present invention is characterized by comprising a vehicle body frame having a support frame that pivotally supports a cab, and an electrical equipment unit, at least a part of which is accommodated in a space surrounded by the support frame.

According to the present invention, since at least a part of the electric equipment unit is accommodated in the space surrounded by the support frame, the space of the vehicle body frame can be effectively utilized, and the arrangement space of the electric equipment on the vehicle body frame can be secured.

In the construction machine according to the present invention, it is preferable that the support frame has a U-shaped cross-sectional shape, and the space is formed by the U-shaped cross-sectional shape.

In the construction machine according to the present invention, it is preferable that the electrical equipment unit is formed by attaching a plurality of electrical equipments to the attachment member and unitizing the electrical equipment unit, at least one of the plurality of electrical equipments is a controller, and the controller is disposed uppermost among the plurality of electrical equipments.

In the construction machine of the present invention, it is preferable that at least one of the plurality of electrical devices is a horn, and the horn is exposed to the outside of the space.

Drawings

Fig. 1 is a side view showing a construction machine according to an embodiment of the present invention.

Fig. 2 is a perspective view showing a vehicle body frame of the construction machine.

Fig. 3 is a perspective view showing a support frame in the vehicle body frame.

Fig. 4 is a perspective view showing the electrical equipment unit accommodated in the support frame.

Fig. 5 is a side view showing the electrical equipment unit accommodated in the support frame.

Detailed Description

[ schematic Structure of Hydraulic shovel ]

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a side view showing a hydraulic excavator 1 as a construction machine of the present embodiment.

In fig. 1, a hydraulic excavator 1 includes a crawler-type lower traveling structure 2 driven by a hydraulic motor, an upper revolving structure 3 rotatably provided on an upper portion of the lower traveling structure 2, a work implement 4 provided on a front side of the upper revolving structure 3 and used for excavating earth and sand, and an electrical equipment unit 5 in which a plurality of electrical equipment are unitized, and is configured as a small-sized hydraulic excavator.

The lower traveling structure 2 includes crawler frames 21. Crawler frame 21 includes a center frame 22 on which upper revolving unit 3 is rotatably mounted, and a pair of crawler frames 23 arranged on both sides of center frame 22 with a space therebetween in the vehicle width direction and around which crawler 24 is wound along the outer periphery.

The upper slewing body 3 includes a slewing frame 31 as a vehicle body frame provided with a slewing hydraulic motor, not shown, at a substantially center thereof. The above-described work implement 4, a cab 32 on which an operator sits, and a counterweight 33 are arranged in this order from the front side to the rear side on the revolving frame 31. As shown by the two-dot chain line in fig. 1, the cab 32 is configured to be tiltable with respect to the revolving frame 31 with the front end side thereof as a fulcrum.

Further, a booth 34 for covering the cab 32 from above is provided on the revolving frame 31. The carport 34 includes a pair of pillars 34A erected on the left and right sides and a roof 34B supported by the upper ends of the pillars 34A. The lower end portions of the columns 34A are supported by the upper surfaces of the left and right ends of the counterweight 33. Note that, in the present embodiment, the front, rear, left, and right are directions based on an operator sitting on the cab 32.

Further, a hydraulic pump (not shown) driven by an engine, a control valve (not shown) for distributing pressure oil pumped from the hydraulic pump to the lower traveling structure 2 and the work implement 4, an EPC (electromagnetic proportional control) valve 35 (fig. 4 and 5) for controlling a pilot pressure of the control valve, an accumulator 36 (fig. 4 and 5) for accumulating the pressure oil, and a vehicle body controller 37 (fig. 2) for controlling these are disposed below the cab 32 in the revolving frame 31. On the other hand, unillustrated tanks such as a fuel tank, a hydraulic oil tank, and a sub-tank for engine coolant are disposed on the right side of the driver's seat 32, and a battery 38 (fig. 2) is disposed behind these tanks.

The work implement 4 includes a boom 41 attached to the revolving frame 31 so as to be vertically swingable, a small arm not shown attached to the tip of the boom 41 so as to be vertically swingable, and a bucket not shown attached to the tip of the small arm so as to be vertically swingable. The boom cylinder 41A, the arm cylinder 41A, and the bucket cylinder are hydraulic cylinders, and the boom cylinder 41A, the arm cylinder, and the bucket cylinder are connected to the tips of the cylinder rods, respectively, and are swung by extending and contracting the cylinder rods by pressure oil from a control valve, not shown.

In the present embodiment, which is a small-sized hydraulic excavator 1, a blade 42 is provided as another work implement at the front portion of the crawler frame 21 of the lower traveling structure 2. The squeegee 42 is operated by a squeegee cylinder not shown. The squeegee cylinder also extends and contracts by pressure oil from the control valve.

[ slewing frame ]

Fig. 2 is a perspective view showing the revolving frame 31.

In fig. 2, the revolving frame 31 includes a bottom plate 311, a pair of main frames 312 erected on the bottom plate 311, a cross member 313 erected on the bottom plate 311 so as to cross the main frames 312, an upper plate 314 erected between upper ends of the pair of main frames 312, and a first support frame 315 and a second support frame 316 as support frames for supporting the cab 32 in a tiltable manner.

The pair of main frames 312 are provided so that the rear end sides thereof are parallel to each other, and extend from the rear end sides to the front end sides so that the distance therebetween is narrowed.

As shown in fig. 3, the first support frame 315 includes an extension portion 315A extending outward in the vehicle width direction from the left main frame 312, and a support portion 315B provided on the upper surface of the extension portion 315A and pivotally supporting the cab 32. The extension portion 315A has a U-shaped cross-sectional shape that opens downward, and the electrical equipment unit 5 is accommodated in a space S formed by the U-shape. The support portion 315B is formed in an L shape, and pivotally supports the front end portion of the cab 32 at its standing portion.

The second support frame 316 is erected on the upper plate 314 at a position on the right side of the main frame 312, and pivotally supports the front end of the cab 32.

[ Electrical Equipment Unit ]

Fig. 4 and 5 are a perspective view and a side view showing the electrical equipment unit 5.

In fig. 4 and 5, the electrical equipment unit 5 includes a register (レジスタ)51 as electrical equipment, a horn 52 as electrical equipment, and a mounting member 53, and is unitized by mounting the register 51 and the horn 52 to the mounting member 53.

The register 51 is a redundant circuit for causing the hydraulic pump to function when the vehicle body controller 37 fails, and is a controller for limiting the current flowing to the hydraulic pump. Via this register 51, the hydraulic pump is connected to the battery 38. In the present embodiment, the register 51 is a resistor, and converts a part of the electric power transmitted from the battery 38 to the hydraulic pump into heat energy and discharges the heat energy.

The attachment member 53 includes a flat plate portion 531, a bent portion 532 bent with respect to the flat plate portion 531, and a bracket 533 provided on one surface of the flat plate portion 531.

The flat plate portion 531 and the bent portion 532 are each formed of a plate-like member having an end portion bent, and are integrally formed with each other.

A register 51 and a connector 54 for wiring are fixed to the surface of the flat plate portion 531 on the side of the holder 533. In the present embodiment, the connector 54 is fixed to a position on the side of the bending portion 532 via the holder 533, and the register 51 is fixed to a position on the opposite side of the bending portion 532.

The bent portion 532 is bent to the side (rear side) opposite to the holder 533. The bent portion 532 has a mounting hole 532A to which the bracket 55 for holding the wiring is mounted, and the wiring is held via the bracket 55.

The holder 533 is formed of a member in which a plate-like member is bent in a stepped shape. The holder 533 has one end side in the step direction welded to the flat plate portion 531 with the arrangement direction of the steps (step direction) directed in the vertical direction. The other end of the bracket 533 is disposed at an interval in front of the flat plate portion 531, and the horn 52 is fixed to the other end.

[ accommodating Structure of Electrical apparatus Unit ]

As shown in fig. 3 to 5, the electrical equipment unit 5 is accommodated in the space S surrounded by the extension portion 315A of the first support frame 315, and the mounting member 53 is fixed to the extension portion 315A by the bolt 56. At this time, the front, upper, and rear of the electrical equipment unit 5 are covered with the first support frame 315. Further, since the register 51 is located above the horn 52, that is, the uppermost among the electric devices of the electric device unit 5, even if the heat generated by the register 51 rises, the heat can be prevented from being transmitted to the lower horn 52.

On the other hand, the horn 52 is located below the lower end of the first support frame 315, and is exposed to the outside of the space S formed by the first support frame 315. By disposing the horn 52 in this manner, the sound emitted from the horn 52 is prevented from being blocked by the first support frame 315, and the sound of the horn 52 is reliably transmitted forward.

In addition, in the mounting member 53, the bent portion 532 is located further outside than the front end of the extended portion 315A of the first support frame 315 and is exposed to the outside of the space S. Therefore, the wire holding bracket 55 can be attached to the bent portion 532, and the wire can be held at the bent portion 532 via the bracket 55.

[ Effect of the embodiment ]

The present embodiment described above has the following effects.

That is, since at least a part of the electrical equipment unit 5 is accommodated in the space S surrounded by the first support frame 315, the space of the revolving frame 31 can be effectively used, and the arrangement space of the electrical equipment on the revolving frame 31 can be secured.

[ modified examples ]

Note that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within a range in which the object of the present invention can be achieved are included in the present invention.

For example, in the above embodiment, the horn 52 is exposed to the outside of the space S formed by the first support frame 315, and a part of the electrical equipment unit 5 is accommodated in the space S, but the entire electrical equipment unit 5 may be accommodated in the space S.

In the above embodiment, the electrical equipment unit 5 is housed in the space S surrounded by the first support frame 315, but the electrical equipment unit 5 may be housed in a space surrounded by another support frame. For example, a second support frame may be configured similarly to the first support frame 315, and the electrical equipment unit 5 may be accommodated in a space surrounded by the second support frame.

In the above embodiment, the extension portion 315A of the first support frame 315 opens downward, but may open upward, horizontally, or in other directions.

In the above embodiment, the support frame is formed in a U shape, but may have another shape as long as it has a space surrounded by the support frame, and for example, the support frame may be formed in a hollow shape and the electric equipment unit 5 may be accommodated in the hollow space.

In the above embodiment, the electrical device unit 5 is configured by unitizing the register 51 and the speaker 52, but may be configured by unitizing another electrical device. In addition, the electrical equipment unit 5 may be formed by mounting another electrical equipment to an electrical equipment, instead of mounting a plurality of electrical equipments to a mounting member, and forming the electrical equipment unit into a unit. The electrical equipment unit 5 includes the register 51 as a controller, but may be another controller, and may include the vehicle body controller 37, for example.

In the above embodiment, the register 51 is formed of a resistor, but may be of an electronic control type.

The mounting member 53 may have other shapes as long as a plurality of electric devices can be mounted thereon.

For example, the attachment member 53 may have a tongue portion extending downward from the lower end of the flat plate portion 531, and the tongue portion may be used as a bracket. The horn 52 may be fixed to the flat plate portion 531.

The curved portion 532 may be curved to the same side (front side) as the bracket 533.

The construction machine is not limited to the hydraulic excavator, and may be a dump truck, for example, as long as the construction machine has a support frame that supports the cab by a shaft.

The present invention can be applied to other mobile machines configured to be tiltable with respect to a vehicle body frame, in addition to construction machines.

Description of the reference numerals

1 … Hydraulic digger (construction machinery)

5 … electric equipment unit

31 … rotary machine frame (vehicle body frame)

32 … driver's cabin

51 … register (electric equipment, controller)

52 … Horn (electric equipment)

315 … first support frame (support frame)

S … space

Claims (4)

1. A construction machine is characterized by comprising:

a vehicle body frame;

an electrical equipment unit;

the vehicle body frame is provided with a support frame for supporting the driving platform,

the support frame has:

an extension portion extending in the vehicle width direction;

a support portion provided on an upper surface of the extension portion and configured to axially support the driver's seat;

at least a part of the electrical equipment unit is accommodated in a space formed by a cross-sectional shape of the extension portion,

the electric equipment unit is formed by mounting a plurality of electric equipments on the mounting member,

at least one of the plurality of electrical devices is a controller,

the controller is disposed uppermost among the plurality of electrical devices.

2. The construction machine as claimed in claim 1,

the extension portion has a U-shaped cross-sectional shape, and the space is formed by the U-shaped cross-sectional shape.

3. The construction machine as claimed in claim 1,

at least one of the plurality of electrical devices is a horn,

the horn is exposed to the outside of the space.

4. The construction machine as claimed in claim 2,

at least one of the plurality of electrical devices is a horn,

the horn is exposed to the outside of the space.

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