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construction machinery

A technology of construction machinery and working oil, which is applied in the direction of mechanical equipment, earth mover/shovel, transmission device control, etc., which can solve the problem of parking difficult goods at the target position, and achieve the effect of good operation feeling

Active Publication Date: 2018-05-01
NIHON KENKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, in the case where the load is to be accurately moved to a predetermined target position while rotating at a low speed, if the above-mentioned rotating body acceleration occurs by further performing the boom raising operation, the normal operation of not accelerating the rotating body will be performed. Depending on the situation, it will be difficult for the operator to correctly park the cargo at the target position

Method used

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Embodiment Construction

[0024] Hereinafter, each embodiment of the present invention will be described by taking a hydraulic excavator as an example of a construction machine and using the drawings. In addition, the present invention can be applied to all construction machines that have an upper revolving body and have both a hydraulic revolving motor and an electric revolving motor as a drive source for the revolving body, and the applicable objects of the present invention are not limited to those used in the following description. Crawler hydraulic excavator. For example, it can also be applied to other construction machines typified by wheel hydraulic excavators and cranes.

[0025] figure 1 It is a side view of the hybrid hydraulic excavator according to the embodiment of the present invention. The hybrid hydraulic excavator shown in this figure has an undercarriage 40 , an upper revolving structure 50 , and a front working device 60 .

[0026] The lower traveling body 40 has: a pair of crawl...

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Abstract

The construction machine of the present invention has: a rotating body (50); a hydraulic pump (1); a hydraulic motor (3) that drives the rotating body (50) by working oil from the hydraulic pump (1); The electric motor (14) that independently drives the rotating body (50); and the hydraulic actuator (16) that operates simultaneously with the rotating body (50) and is driven by the working oil from the hydraulic pump (1), when rotating When the body (50) and the hydraulic actuator (16) operate simultaneously, the rotating body (50) is rotated only by the electric motor (14).

Description

technical field [0001] The present invention relates to a construction machine including both a hydraulic motor and an electric motor as a drive source of a revolving body. Background technique [0002] Among construction machines (for example, hydraulic excavators) having a hydraulic pump driven by an engine, a hydraulic actuator driven by operating oil from the hydraulic pump, and a rotary body, there is included a hybrid type construction machine which is powered by an electric motor The rotating body is driven and braked, and the kinetic energy of the rotating body at the time of rotation braking is regenerated into electrical energy. In this construction machine, the revolving body is driven by an electric motor using regenerative electric power obtained during slewing braking, thereby reducing hydraulic pump power (that is, engine load) and achieving energy saving by reducing fuel consumption of the engine. [0003] Such a hybrid construction machine includes a type i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/20F15B11/02F15B11/028F16H61/4078
CPCE02F9/123E02F9/2095E02F9/2217E02F9/2282E02F9/2285E02F9/2296F15B2211/7058F15B2211/7135F15B2211/781F15B2015/206E02F9/2203E02F9/20E02F9/22F15B11/04F15B11/162F15B11/165F15B13/06F15B13/14F15B2211/205F15B2211/20515F15B2211/75
Inventor 西川真司佐竹英敏井村进也泉枝穗石川广二
Owner NIHON KENKI CO LTD
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