摘要:
A wheel tractor scraper having a rear wheel drive assist, the wheel tractor scraper includes a tractor portion pivotally coupled to a rear scraper portion, the rear scraper portion having a bowl for hauling material and a fluid powered work tool configured to assist in loading the bowl, the work tool powered by a fluid pump connected to a fluid operated work tool motor. The rear wheel drive assist includes a fluid operated drive motor coupled to the rear wheels of the machine, a diverter valve having a first position at which fluid flow is delivered from the pump to the work tool motor and a second position at which fluid flow is delivered from the pump to the drive motor, and a controller being configured to control the diverter valve to engage the rear wheel drive assist. The machine may be operated by engaging the pump and work tool motor, and then actuating the diverter valve to the second position to divert flow from the work tool motor to the drive motor.
摘要:
A wheel tractor scraper having a rear wheel drive assist, the wheel tractor scraper includes a tractor portion pivotally coupled to a rear scraper portion, the rear scraper portion having a bowl for hauling material and a fluid powered work tool configured to assist in loading the bowl, the work tool powered by a fluid pump connected to a fluid operated work tool motor. The rear wheel drive assist includes a fluid operated drive motor coupled to the rear wheels of the machine, a diverter valve having a first position at which fluid flow is delivered from the pump to the work tool motor and a second position at which fluid flow is delivered from the pump to the drive motor, and a controller being configured to control the diverter valve to engage the rear wheel drive assist. The machine may be operated by engaging the pump and work tool motor, and then actuating the diverter valve to the second position to divert flow from the work tool motor to the drive motor.
摘要:
A hydraulic system for lifting a work tool of a mobile machine is disclosed. The hydraulic system may have a pump, a lift actuator, a lift valve arrangement, and a lift sensor configured to generate a first signal indicative of an actual lift velocity. The hydraulic system may also have a tilt actuator, a tilt valve arrangement, and at least one operator interface device movable to generate a second signal indicative of a desired lift velocity and a third signal indicative of desired tilt velocity. The hydraulic system may further have a controller configured to command the lift valve arrangement to meter pressurized based on the second signal, command the tilt valve arrangement to meter pressurized fluid based on the third signal, and command the tilt valve arrangement to meter pressurized fluid and maintain a desired tilt angle of the work tool during lifting based selectively on the first and second signals.
摘要:
A lock body through bore receives a steel bolt with an array of annular grooves. A locking mechanism secured in the bore has an annular array of locking jaws normally biased engaged with an inserted bolt groove. A jaw spreader has a conical surface for spreading the jaws radially outwardly to disengage the bolt. A locking member normally is radially outwardly of the jaws to preclude such spreading. A spring with a high spring constant, e.g., 300 pound load, axially biases the locking member in the jaw locking position. The spreader and locking member define a locking jaw conical path for radially outwardly releasing the jaws during bolt insertion and for locking the jaws in the opposite bolt withdrawal direction. A manually operated tool with a rotatable cylinder which engages the spreader and including a pair of lock gripping tines provides a high force to the spreader to axial displace it against the locking member spring to release the bolt locking jaws while simultaneously radially outwardly releasing the jaws from the bolt.
摘要:
The present invention is directed to a system and method which makes a phased array look like a curved array for purposes of performing spatial compounding calculations. In one embodiment, the phased array is treated as though it were a curved array by creating both a virtual apex and a virtual radius of curvature. Based on this transformation, standard spatial-compounding resampling tables can be used just as they are with curved arrays. In one embodiment, after the data is compounded to form the target image, certain data is removed prior to the actual display. This removed data represents data generated by virtual rays the prior to the physical skin line of the phased array.
摘要:
An apparatus for limiting the control of a work implement is disclosed. The implement is connected to a work machine and is moveable in response to operation of a hydraulic cylinder. The apparatus includes an operator controlled joystick. A joystick position sensor senses the position of the joystick and responsively generates an operator command signal. An implement position sensor senses the position of the work implement and responsively produces an implement position signal. A microprocessor based controller receives the implement position and operator command signals, modifies the operator command signal, and produces an electrical valve signal in response to the modified operator command signal. An electrohydraulic valve receives the electrical valve signal, and controllably provides hydraulic fluid flow to the hydraulic cylinder in response to a magnitude of the electrical valve signal.
摘要:
An apparatus for controllably moving a work implement is disclosed. The implement is connected to a work machine and is moveable in response to operation of a hydraulic cylinder. The apparatus includes an operator controlled joystick. A joystick position sensor senses the position of the joystick and responsively generates an operator command signal. An implement position sensor senses the position of the work implement and responsively produces an implement position signal. A microprocessor based controller receives the implement position and operator command signals, modifies the operator command signal, and produces an electrical valve signal in response to the modified operator command signal. An electrohydraulic valve receives the electrical valve signal, and controllably provides hydraulic fluid flow to the hydraulic cylinder in response to a magnitude of the electrical valve signal.
摘要:
A hydraulic system for a mobile machine is disclosed. The hydraulic system may have a first actuator, a first valve arrangement, a second actuator, and a second valve arrangement. The hydraulic system may also have at least one operator interface device movable by an operator to generate a first signal indicative of desired work tool movement in a first manner, and a second signal indicative of desired work tool movement in a second manner; and a controller configured to generate a first flow rate command directed to the first valve arrangement based on the first signal, and generate a second flow rate command directed to the second valve arrangement based on the second signal. The controller may also be configured to selectively generate a third flow rate scaled from the first flow rate command and directed to the second valve arrangement based on only the first signal.
摘要:
A sealing device is provided that includes a bolt having a shaft, a tapered end and a circumferential groove; a lock body having an open end leading into a hollow portion; an overmold substantially surrounding the lock body and including an aperture aligned with the open end of the lock body; a lock clip located in the hollow portion of the lock body; and a washer having a hole aligned with the aperture in the overmold and the opening in the lock body and located between an end of the overmold and the lock clip, the lock clip including a plurality of spokes extending inwardly from an outer periphery portion. Some of the spokes can include an inner flange extending generally perpendicular to the spoke, and the inner flanges form a non-continuous inner ring portion.
摘要:
A cable seal lock assembly including a housing having a top end and a bottom end with at least two openings in each end. A generally cylindrical-shaped cable sleeve is located in the housing and has a bore therethrough, and ends of the bore are aligned with respective openings in the top and bottom ends of the housing. A clip sleeve is located at least partially within the housing and has a bore of non-uniform diameter extending therethrough, and one end of the clip sleeve extends through one of the openings in the top end of the housing, with the bore at the other end of the clip sleeve aligned with one of the openings at the bottom end of the housing. A locking clip is located in the clip sleeve, and a backing plate is located in the housing with holes that are aligned with the openings at one end of the housing.