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Construction machine

A technology for construction machinery and engines, applied in construction, earthmoving machines/shovels, etc., can solve problems such as unfavorable work efficiency, disturbing operators, dangers, etc., to improve safety and work efficiency, improve work efficiency, eliminate underpowered effect

Inactive Publication Date: 2007-05-02
KOBELCO CONSTR MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technique does not solve the problem
Worse, workers confuse a no-warning state with a safe state, leading to more serious hazards
[0015] Thus, in conventional construction machines, there is an inherent problem in that information indicating that the construction machine is working, engine sound information representing the magnitude of the workload is not transmitted to the operator or surrounding workers, or is not transmitted to them correctly
This sudden restart of the engine can startle the operator and surrounding workers and therefore pose a risk to their mental health
[0021] Also, this can have an adverse effect on work efficiency as an engine restart occurs while the operator is concentrating on fine work, which can disturb and overwhelm the operator

Method used

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Examples

Experimental program
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Effect test

no. 1 example

[0049] First embodiment (refer to Fig. 1 and 2)

[0050] The construction machine of the first embodiment is a tandem type.

[0051] In the first embodiment and other embodiments of the present invention (to be described later), the same parts as those in FIGS. 7 and 8 are denoted by the same reference numerals, and thus their descriptions are omitted to avoid repetition.

[0052] As shown in FIG. 1 , in a series system, the output of the generator 2 is transmitted to the electrical energy storage device 3 through the generator controller 9 .

[0053] In addition, the outputs of the generator 2 and the electric energy storage device 3 are transmitted to the motor 4 through the motor controller 10 , whereby the motor 4 rotates to drive the hydraulic pump 5 .

[0054] The charging amount of the electric energy storage device 3 is detected by the charging state management device 11 and transmitted to the controller 12 .

[0055] In addition to the amount of charge input to the ...

no. 2 example

[0071] Second embodiment (refer to Fig. 3)

[0072] The construction machines of the second embodiment are of the parallel type. Only the differences between the second embodiment and the first embodiment are described here.

[0073] In the parallel system, the electric energy storage device 3 is connected to the generator motor 8 through the inverter / converter 19, and the charging / discharging of the electric energy storage device 3 is controlled in response to the shortage / excess of the generator output of the generator motor 8.

[0074] The inverter / converter 19 switches between the generator function and the motor function of the generator motor 8 based on instructions from the controller 12, and controls the generated output (the number of revolutions of the generator motor 8) and the rotation speed of the generator motor 8. moment control, and so on.

[0075] As described above, in the parallel system, the engine 1 is always on during operation, and there is no operatin...

no. 3 example

[0086] Third embodiment (refer to FIG. 4 )

[0087] Fig. 4 is a block diagram showing the constitution of a driving system and a control system of a tandem construction machine according to a third embodiment of the present invention. The same parts in FIG. 4 as those in FIG. 7 are denoted by the same reference numerals, and their descriptions are omitted to avoid repetition.

[0088] As shown in FIG. 4 , the output of the generator 2 is transmitted to the electrical energy storage device 3 through a generator controller 9 .

[0089] Also, the output of the generator 2 and the electric energy storage device 3 is transmitted to the motor 4 through the motor controller 10 , whereby the motor 4 rotates to drive the hydraulic pump 5 .

[0090] The charging state management device 11 detects the charging amount of the electric energy storage device 3 and transmits the detection result to the controller 12 .

[0091] In addition to the amount of charge, the input to the controller...

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Abstract

In a hybrid construction machine, its display device displays, toward an operator, an artificial engine sound serving as load information according to a magnitude of a workload, instead of an engine sound. Furthermore, the display device issues an alarm sound to surrounding workers when performing an operation by only stored electrical power of an electrical energy storage device without using an engine. In this hybrid construction machine, in addition to the issuing of alarm from the display device during the operation without using the engine, the display device issues an advance notice sound for engine restart when at least one value out of the workload and a charge amount of the electrical energy storage device has become an advance notice set value close to a set value of engine restart.

Description

technical field [0001] The present invention relates to a hybrid construction machine that utilizes a combination of both the power of an engine and the electricity stored in an electrical energy storage device. Background technique [0002] According to the utilization method of engine power and stored electricity, hybrid construction machinery is divided into series type and parallel type. An example of the parallel type is disclosed in Japanese Unexamined Patent Application Publication No. 2004-150305. [0003] For known hydraulic excavators that are not based on hybrid models, the sound of the engine varies with the size of the workload. Generally, the operator estimates the workload by listening to the sound of the engine, and feeds back the estimated result to the operation of the hydraulic excavator. For example, if the operator estimates that the load is too large, he / she makes the operation of the hydraulic excavator in the direction of reducing the load. [0004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/22E02F9/26
Inventor 小见山昌之鹿儿岛昌之
Owner KOBELCO CONSTR MASCH CO LTD
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