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公开(公告)号：US10920396B1
公开(公告)日：2021-02-16
申请号：US16527586
申请日：2019-07-31
Applicant: Caterpillar Inc.
Inventor： Travis N. Richards , Ernest E. Stoops , Michael L. Repscher , Stive Ramalho , Wesley T. Payne
Abstract: A hydraulic system for a motor grader is disclosed. The hydraulic system may include a first hydraulic subsystem and a second hydraulic subsystem. A pump may be configured to provide pressurized fluid to the first and second hydraulic subsystems. The hydraulic system may further include a control valve located upstream of the first and second hydraulic subsystems. The control valve may be configured to vary a standby pressure of pressurized fluid for use by the first and second hydraulic subsystems.
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公开(公告)号：US20230064337A1
公开(公告)日：2023-03-02
申请号：US17458033
申请日：2021-08-26
Applicant: Caterpillar Inc.
Inventor： Ethan M. Tevis , Michael C. Gentle , Travis N. Richards , Michael L. Repscher , Ernest E. Stoops
Abstract: A technique is directed to methods and systems of an implement lock-out on lever-controlled machines. A lock-out system can monitor the position of an implement and lock-out the implement control(s) when the implement is within a threshold distance to parts of the machine. The lock-out system can generate an implement lock-out to slow, stop, or reduce the force of a hydraulic valve(s) controlling the implement. The lock-out system can use inputs such as electronic fence blade position system data, articulation angles, wheel lean angles, steering angles, ripper positions, mode selection or similar data to determine to generate the implement lock-out. The lock-out system can generate the implement lock-out by a flow supply shutoff to the implement while maintaining pressure to the steering valve. The lock-out system can send visual or audible notifications to alert the operator of the implement's proximity to the machine or of an implement lock-out.
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公开(公告)号：US20230130171A1
公开(公告)日：2023-04-27
申请号：US17509978
申请日：2021-10-25
Applicant: Caterpillar Inc.
Inventor： Ernest E. Stoops , Nathaniel K. Harshman , Jonathan M. Bloot
Abstract: A hydraulic system for operating a circle drive gear of a grading machine includes a pump configured to output pressurized fluid, a directional control valve fluidly coupled to the pump, a bidirectional hydraulic motor located downstream of the directional control valve and fluidly coupled to the directional control valve via hydraulic lines. The hydraulic motor has an output shaft that is configured to be rotationally driven by pressurized fluid output by the pump. Dual counterbalance valves may be disposed within the hydraulic circuit of the directional control valve and hydraulic motor such that any gearbox driven by the hydraulic motor is protected from external opposing forces. Accordingly, motion in the circle drive system is hydraulically locked at the beginning and release of a circle rotation command with the help of fluid pressure in the hydraulic lines.
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公开(公告)号：US20170036656A1
公开(公告)日：2017-02-09
申请号：US14818338
申请日：2015-08-05
Applicant: Caterpillar Inc.
Inventor： Ernest E. Stoops , Srikalyan C. Puranam , Adam Adeeb
CPC classification number: B60T13/141 , B60T13/662 , B60T13/686 , B64F1/16
Abstract: A hydraulic control system for a machine, the machine having a service brake and a parking brake, includes a hydraulic fluid tank, a pump configured to withdraw hydraulic fluid from the hydraulic fluid tank, and a first accumulator and a second accumulator fluidly connected to the pump. The first and second accumulators configured to supply the hydraulic fluid to the service brake and the parking brake. Further, a resolver valve fluidly coupled between the first and second accumulators and configured to selectively supply the hydraulic fluid from one of the first and second accumulators to the parking brake.
Abstract translation: 一种用于机器的液压控制系统，具有行车制动器和驻车制动器的机器包括液压油箱，构造成从液压油箱中抽出液压流体的泵以及与液压油箱流体连接的第一储液器和第二储液器 泵。 第一和第二蓄液器构造成将液压流体供应到行车制动器和驻车制动器。 此外，解算器阀流体地联接在第一和第二蓄能器之间并且被配置为选择性地将液压流体从第一和第二蓄能器中的一个供应到驻车制动器。
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