A positioning system, for a boom having right and left boom arms, comprises: a first actuator for moving the right boom arm relative to a support frame; a second actuator for moving the left boom arm relative to a support frame; a first hydraulic link between the first and second actuators; and a hy
A positioning system, for a boom having right and left boom arms, comprises: a first actuator for moving the right boom arm relative to a support frame; a second actuator for moving the left boom arm relative to a support frame; a first hydraulic link between the first and second actuators; and a hydraulic control device for controlling movement of hydraulic fluid within the first hydraulic link, thereby controlling extension and/or retraction of the first and second actuators.
대표청구항▼
1. A positioning system for a boom having right and left boom arms, the positioning system comprising: a first actuator for moving the right boom arm relative to a support frame;a second actuator for moving the left boom arm relative to the support frame;a first hydraulic link between the first and
1. A positioning system for a boom having right and left boom arms, the positioning system comprising: a first actuator for moving the right boom arm relative to a support frame;a second actuator for moving the left boom arm relative to the support frame;a first hydraulic link between the first and second actuators; anda hydraulic control device for controlling movement of hydraulic fluid within the first hydraulic linkthe hydraulic control device comprising a hydraulic drive comprising a moveable element having first and second ends coupled by a connecting portion, the connecting portion extending through a partition wall of the hydraulic drive to allow the moveable element to slide relative to the partition wall within the hydraulic drive,wherein first and second drive chambers are formed between the partition wall and respective ones of the first and second ends of the moveable element, and first and second link chambers are formed between the respective ones of the first and second ends of the moveable element and respective end portions of the hydraulic drive,wherein the hydraulic fluid provided to one of the first and second drive chambers causes a movement of the movable element, so as to provide the displacement of the hydraulic fluid in one of the first and second link chambers, to thereby control a position of the first and second actuators. 2. A positioning system according to claim 1, wherein the boom is subject to a first input disturbance defined by a roll/yaw input, and a second input disturbance defined by a linear input, and the positioning system manages the first input disturbance separate from the second input disturbance. 3. A positioning system according to claim 2, wherein: the first and second link chambers are linked to the first and second actuators respectively, such that the position of the movable element controls the position of the first and second actuators. 4. A positioning system according to claim 3, wherein the hydraulic drive comprises a third actuator which is mechanically linked to the movable element. 5. A positioning system according to claim 4, wherein the third actuator forms a part of a rotary hydraulic system. 6. A positioning system according to claim 1, wherein the position of the first and second actuators is one of an extension and a retraction, and wherein the first and second actuators are linked by a second hydraulic link, such that as one actuator extends, the other retracts. 7. A positioning system according to claim 1, wherein the first and second actuators are linear actuators. 8. A positioning system according to claim 1, wherein the first and second actuators are rotary actuators. 9. A positioning system according to claim 1, wherein: the boom is mounted on a vehicle and the first and second actuators rotate the right and left boom arms respectively around an axis that is substantially parallel to a direction of travel of the vehicle. 10. A positioning system according to claim 1, wherein: the boom is mounted on a vehicle and the first and second actuators rotate the right and left boom arms respectively around an axis that is substantially vertical when the vehicle is on flat ground. 11. A positioning system according to claim 3, wherein the first hydraulic link comprises a hydraulic link element which is arranged in parallel with the hydraulic drive, such as to allow the first and second actuators to move under the influence of a sudden force, without movement of the movable element. 12. A positioning system according to claim 11, wherein: the hydraulic link element comprises third and fourth link chambers which are separated by a mechanical element, the third link chamber being linked to the first link chamber and to the first actuator, the fourth link chamber being linked to the second link chamber and to the second actuator; andthe hydraulic link element comprises a biasing element which biases the mechanical element towards a neutral position. 13. A positioning system according to claim 1, wherein the hydraulic drive comprises a flow metering system which is connected to the first hydraulic link. 14. A boom sprayer having right and left boom arms and a positioning system, the position system comprising: a first actuator for moving the right boom arm relative to a support frame;a second actuator for moving the left boom arm relative to the support frame;a first hydraulic link between the first and second actuators; anda hydraulic control device for controlling movement of hydraulic fluid within the first hydraulic linkthe hydraulic control device comprising a hydraulic drive comprising a moveable element having first and second ends coupled by a connecting portion, the connecting portion extending through a partition wall of the hydraulic drive to allow the moveable element to slide relative to the partition wall within the hydraulic drive,wherein first and second drive chambers are formed between the partition wall and respective ones of the first and second ends of the moveable element, and first and second link chambers are formed between the respective ones of the first and second ends of the moveable element and respective end portions of the hydraulic drive,wherein the hydraulic fluid provided to one of the first and second drive chambers causes a movement of the movable element, so as to provide the displacement of the hydraulic fluid in one of the first and second link chambers, to thereby control a position of the first and second actuators. 15. The boom sprayer according to claim 14, wherein the boom sprayer is subject to a first input disturbance defined by a roll/yaw input, and a second input disturbance defined by a linear input, and the positioning system manages the first input disturbance separate from the second input disturbance. 16. The boom sprayer according to claim 15, wherein: the first and second link chambers are linked to the first and second actuators respectively, such that the position of the movable element controls the position of the first and second actuators. 17. The boom sprayer according to claim 14, wherein the boom sprayer is mounted on a vehicle, and the position of the first and second actuators is one of an extension and a retraction, and the first and second actuators rotate the right and left boom arms respectively around an axis that is substantially parallel to the direction of travel of the vehicle. 18. The boom sprayer according to claim 16, wherein the first hydraulic link comprises a hydraulic link element which is arranged in parallel with the hydraulic drive, such as to allow the first and second actuators to move under the influence of a sudden force, without movement of the movable element.
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이 특허에 인용된 특허 (12)
Radke, Daniel Dean; Nagorcka, James Arthur; Allen, Lyal Douglas, Articulated dozer with suspension and suspension lockout.
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