摘要:
A swing system of a construction machine having a power generation function is provided. The construction machine includes a lower driving structure capable of traveling, an upper swing structure mounted on an upper portion of the lower driving structure and provided with a working device, a swing ring gear fixed to the lower driving structure, a swing ring gear cover fixed to the upper swing structure and engaged with the swing ring gear to perform a rotational operation, a permanent magnet installed on one of the swing ring gear and the swing ring gear cover, and an induction coil installed on the other of the swing ring gear and the swing ring gear cover. Induction current is generated in the induction coil in accordance with the rotational operation of the swing ring gear cover.
摘要:
Construction equipment having an electric control lever is provided, which can intercept a control signal applied to a flow control valve when trouble occurs in the electric control lever or a control unit. The construction equipment includes an electric control lever outputting a manipulation signal in proportion to a manipulation amount, a manipulation locking lever outputting a manipulation signal for control in preference to the manipulation signal when an error occurs in the manipulation signal, an electronic flow control valve installed in a flow path between the hydraulic pump and the hydraulic actuator and shifted, by signal pressure input in proportion to the manipulation signal, to control a start, a stop, and a direction change of the hydraulic actuator, a control unit having an operation unit operating a control signal that corresponds to the manipulation signal, and a current driving unit controlling current so that a current value corresponding to the control signal can be applied to the electronic flow control valve, and a power control unit intercepting current applied from the current driving unit to the electronic flow control valve when the manipulation locking lever is manipulated in a state where trouble has occurred in the electric control lever or the control unit.
摘要:
A pressure control valve is provided, which can variably control the set pressure of a relief valve in accordance with pilot signal pressure that is controlled in an operator's seat and so on when the set pressure of the relief valve required in a replaced working device is changed.
摘要:
A traveling and turning device for a construction machine is provided, which includes a left driving motor and a right driving motor driven by hydraulic fluid, a left main control valve and a right main control valve controlling movement of the left driving motor and the right driving motor, respectively, and a left pedal and a right pedal adjusting the operation state of the left main control valve and the right main control valve, respectively. One of the left pedal and the right pedal enables the construction machine to make forward and backward movement by simultaneously applying pressure to a left side of a spool of the left main control valve and a left side of a spool of the right main control valve or by simultaneously applying pressure to a right side of the spool of the left main control valve and a right side of the spool of the right main control valve, and the other of the left pedal and the right pedal enables the construction machine to make turning movement by simultaneously applying pressure to the left side of the spool of the left main control valve and the right side of the spool of the right main control valve or by simultaneously applying pressure to the right side of the spool of the left main control valve and the left side of the spool of the right main control valve.
摘要:
An engine room for construction equipment is provided, which can minimize emission of noise generated in an engine room due to driving of an engine and a ventilating fan to an outside of the engine room by absorbing the noise through a noise trap, and can improve the cooling performance of corresponding components by smoothing inhalation/discharge of an external air to/from the airtight engine room. The engine room for construction equipment includes a radiator cooling water for cooling the engine, a muffler discharging an exhaust gas from an engine to the atmosphere, a first noise trap installed in an inlet port to absorb noise generated in the engine room and emitted to an outside, a second noise trap installed in an outlet port to absorb the noise generated in the engine room and emitted to the outside, a radiator fan inhaling the external air through the first noise trap and making the inhaled external air pass through the radiator and the circumference of the engine, a discharge fan discharging the air in the engine room to the outside through the second noise trap, and an outer wall forming an airtight space for accommodating therein the engine, the muffler, the radiator fan, the hydraulic pump, and the discharge fan that generate the noise.
摘要:
An upper frame for an excavator is provided to smoothly transmit the load and shock which is transmitted through a mounting portion of a working device during operation (e.g., a lifting operation mode), to an upper frame by integrally installing a bracket for mounting a fuel tank or the like on an upper plate of the upper frame. The upper frame includes a center frame having a bottom plate and a pair of side plates and vertically welded to the bottom plate, a left side frame welded to the side plate of the center frame, a right side frame welded to the side plate of the center frame, an upper plate placed in the front of the center frame for supporting a bracket for a working device, to which a boom is pivotally secured, and an extended member integrally extended from one end of the upper plate for supporting desired parts.
摘要:
An apparatus for easing an impact on a boom of an excavator and a method of controlling the same are disclosed, which can minimize the vibration occurring in the boom due to the impact on a boom cylinder by actively controlling an amount of hydraulic fluid being supplied to the boom cylinder when the operation of the boom cylinder is suddenly stopped due to an operator's sudden manipulation of an operation lever for a working device. The apparatus includes first and second hydraulic pumps; a boom cylinder; a main control valve; an operation lever for supplying pilot signal pressure to a spool of the main control valve when an operator manipulates the operation lever; operation lever detection means for detecting boom up and boom down signal pressures according to an amount of manipulation of the operation lever; boom cylinder pressure detection means for detecting pressures generated in a large chamber and a small chamber of the boom cylinder; a controller for calculating and outputting a control signal of the main control valve if the boom cylinder has been suddenly stopped; and boom vibration preventing means for controlling the pilot signal pressure being supplied from the second hydraulic pump to the main control valve.
摘要:
An excavator mounted with tanks having side doors. Bend-formed side doors are mounted on outer sides of a hydraulic fluid tank and a fuel tank that are welded structures mounted on an upper frame of the excavator, have the same curved surfaces as an external shape of the equipment, so that no precise tank manufacturing work is required and welded portions of the tanks are prevented from being exposed to an outside.
摘要:
A reinforced upper frame for supporting a cabin of heavy construction equipment using a welding deformation preventing structure and a method of manufacturing the same are disclosed, in which even if a side frame is welded to a machined center frame, there is no thermal deformation around the machined portion. The reinforced upper frame includes a center frame having a lower plate machined to accommodate a swing ring gear, a lateral plate machined to accommodate an operation device, and a welding deformation preventing structure fixed to one side of the lower plate and lateral plate prior to welding, in which a part of the cabin is mounted on the welding deformation preventing structure, and left and right frames each having a side channel disposed in a longitudinal direction of the center frame and a side frame welded to the structure for connecting the side channel and the center frame.
摘要:
Provided is a construction equipment cab having a protective structure capable of protecting an operator from injury due to deformation of a cab in the event of a rollover accident. The construction equipment cab is mounted on an upper swivel body, and the protective structure is mounted on the cab and the upper swivel body and protects an operator from the cab in a rollover accident. The construction equipment cab includes a lower panel provided at a rear lower portion of the cab to be sunk in a forward direction in order to secure a space in which the protective structure is held, and a unit for fixing the protective structure held in the space to the upper swivel body and the cab.