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Hybrid construction machine

A technology of construction machinery and hybrid power, which is applied in the direction of hybrid vehicles, liquid variable capacity machinery, mechanical equipment, etc., can solve the problems that hybrid power is not easy to realize, and achieve the effect of ensuring configuration space

Active Publication Date: 2015-01-14
NIHON KENKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since the size of the upper revolving body in the front-rear direction (longitudinal direction) is limited, it is difficult to arrange (parallel-connect) the hydraulic pump and the generator / motor in parallel with the engine. Therefore, it is not easy to achieve hybridization.

Method used

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Embodiment Construction

[0044] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. This embodiment is applied to a mini-shovel as an example of a hybrid construction machine.

[0045] First, the drive system in the hybrid mini excavator of this embodiment will be described.

[0046] figure 1 It is a schematic diagram showing the configuration of the drive system in the hybrid mini excavator according to the present embodiment.

[0047] in the figure 1 Among them, 1 is the engine system, 2 is the hydraulic system, 3 is the electric power generation system, and 4 is the control system.

[0048] The engine system 1 has a diesel engine 11 , an engine control panel 12 , an engine controller 13 and an electronic governor 14 .

[0049] The engine 11 is a downsized (low output) engine mounted on an engine-type mini-shovel, as will be described later. The engine control panel 12 instructs the target rotational speed of the engine by an operator's operat...

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PUM

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Abstract

Provided is a hybrid construction machine capable of facilitating the hybridization (conversion, redesigning, etc. into a hybrid construction machine) even for construction machines of the minimal tail swing radius type or the minimal swing radius type. A hybrid mini-shovel of the minimal tail swing radius type comprises an engine 11, a hydraulic pump 21 whose input shaft 21a is coaxially connected to the output shaft 11a of the engine 11, a generator / motor 31 whose rotating shaft 31a is connected to the output shaft 11a of the engine 11 and the input shaft 21a of the hydraulic pump 21 via a gear mechanism 6, and a battery 33 which receives and supplies electric power from / to the generator / motor 31. The generator / motor 31 is placed at a vertical position where its lower end is situated above the shaft center of the input shaft 21a of the hydraulic pump 21, and when viewed from above at a horizontal position where it overlaps with the hydraulic pump 21.

Description

technical field [0001] The present invention relates to a hybrid construction machine with a generator / motor connected to an engine and a hydraulic pump, and more particularly to a hybrid construction machine of a rear ultra-small rotation type or an ultra-small rotation type. Background technique [0002] A hydraulic excavator as a kind of construction machinery generally has: a lower traveling body; an upper rotating body rotatably provided on the lower traveling body; Machine, the work machine includes boom, arm and bucket. The hydraulic driving device of this hydraulic excavator has, for example: a hydraulic pump driven by an engine; a plurality of hydraulic actuators driven by hydraulic oil from the hydraulic pump (specifically, a hydraulic motor for travel, a hydraulic cylinder for a boom, and a hydraulic cylinder for an arm). hydraulic cylinders, bucket hydraulic cylinders, etc.); and a control valve that controls the flow of hydraulic oil from the hydraulic pump to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/20E02F9/00E02F9/22
CPCF16H61/421E02F9/2285E02F9/2235E02F9/2075E02F9/166E02F9/0858E02F3/325E02F9/2296E02F9/0866E02F9/2246F04B17/05B60K6/26B60K6/40B60K6/48B60K6/543B60K2006/4825B60K2006/4833B60W10/06B60W10/08B60W20/00B60W20/10B60W2300/17B60W2520/10B60W2710/0677B60W2710/086B60W20/19E02F9/2253Y02T10/62E02F9/20E02F9/22
Inventor 吉田肇石井元
Owner NIHON KENKI CO LTD
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