Construction machine

Abstract

The present invention provides a construction machine, which improves the operability of a remote controller by using a simple and chip structure regardless of the attitude of the body of the construction machine. A controller (70) performs corrective control on the output of a hydraulic pump (1) corresponding to the attitude of a machine body (12) according to an operation signal of a remote controller (5) and the output of a gyro sensor (8). Therefore, since the corrective control of the output of the hydraulic pump (1) is carried out according to the attitude of the machine body (12), operability equivalent as on a normal horizontal plane can be ensured with a simple and chip structure even in the cases that the machine has various attitudes, such as on a inclined plane, so that the operability of the remote controller (5) is improved.

Description

technical field [0001] The present invention relates to construction machines such as hydraulic excavators, cranes and the like. Background technique [0002] Conventionally, as a construction machine, there is a construction machine described in JP-A-4-366235 (Patent Document 1). [0003] This conventional construction machine includes: a traveling device; a revolving body on the traveling device; a gyro sensor that detects the inclination angle of the revolving body; an operating mechanism consisting of a boom, an arm, and a bucket attached to the revolving body; a hydraulic actuator for the arm, a hydraulic actuator for the arm, and a hydraulic actuator for the bucket; a flow directional control valve that controls flow and direction to the hydraulic actuator for the boom; and a control unit that controls flow according to The output of the gyro sensor is used to control the flow direction control valve. [0004] In addition, when the swing body is raised by a predeterm...

AI Technical Summary

Problems solved by technology

[0013] In addition, since the opening characteristic of the control valve 3 is determined by the groove-shaped passage formed by machining of the spool valve, the opening characteristic cannot be easily changed, and it is determined according to the condition of the flat ground of the machine body with high operating frequency.

In other words, if the opening characteristic of the control valve 3 is to be changed, the control becomes extremely complicated and the cost becomes high, and the opening characteristic cannot be changed realistically.

[0014] On the other hand, the operating conditions of hydraulic excavators vary greatly depending on the work site, and the operability may be greatly deteriorated depending on the combination of conditions such as the working posture and working conditions.

[0015] For example, in the case where the hydraulic motor 2 is used to perform a swing operation on the machine body, if the control valve 3 is set according to the most suitable conditions for the swing operation on flat ground, then in the operation on the sloped ground, the load increases. When operating sideways, there is a problem that due to the increase of the load on the flat ground, a higher than usual operation amount is required, and the operability deteriorates.

This is because, for example, it becomes the same state as when the car starts on a hill with an increased amount of accelerator pedal, and the operability deteriorates.

Images