Device for multi-stage gearbox and method of operating
AssigneeClass Industrietechnik GmbH
InventorsWerner Engenhorst, Manfred Gersmann, Norbert Strieker
Life of this patent
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Abstract
A multi-stage gearbox has at least one shifter rod which may be engaged and locked in a predetermined position by at least one locking element. The locking element is coupled to a setting element such that the setting element can be set in at least two different positions relative to the locking element by a control device. A method of controlling such a gearbox includes the step of moving the setting element from a retention position into a shift position by actuating a push-button.
Claims27
A device for a multi-stage gearbox comprising:
- a shifter rod;
- a locking element for engaging and locking said shifter rod in a predetermined position;
- a setting element coupled to the locking element and moveable between at least two different positions relative to the locking element;
- a hydraulic control device for setting the setting element in either of the two different positions relative to the locking element, the setting element being in the form of a shifter pin having a first stop and which may be axially displaced between a shift position and a retention position by means of the hydraulic control device;
- a first spring and a second spring associated with the shifter pin, said first and second springs being so constructed and arranged as to work in opposite directions of displacement relative to said shifter pin;
- and
- wherein the first spring has first and second ends, the first end of the first spring resting on said locking element, and the second end of the first spring being supported against the first stop on said shifter pin.
A method of controlling an agricultural machine gearbox including a shifter rod;
- a locking element for engaging and locking said shifter rod in a predetermined position;
- a setting element coupled to the locking element and moveable between a retention position and a shift position;
- a control device for setting the setting element in either of the two positions and a short-circuiting valve, including the steps of:
- moving the setting element from said retention position into said shift position by actuating a push-button, and actuating the short-circuiting valve simultaneously with moving the setting element into said shift position.
A method of controlling an agricultural machine gearbox including a shifter rod;
- a locking element for engaging and locking said shifter rod in a predetermined position;
- a setting element coupled to the locking element and moveable between a retention position and a shift position;
- a control device for setting the setting element in either of the two positions, and a short-circuiting valve;
- and the agricultural machine having a braking device;
- including the steps of:
- moving the setting element from said retention position into said shift position by actuating a push-button, and applying a blocking force to the setting element when said braking device is actuated.
A device for a multi-stage gearbox comprising:
- a shifter rod;
- a locking element for engaging and locking said shifter rod in a predetermined position;
- a setting element coupled to the locking element and moveable between at least two different positions relative to the locking element, the two different positions including a shift position;
- a control device for setting the setting element in either of the two different positions relative to the locking element;
- a short-circuiting valve;
- and
- means for actuating the short-circuiting valve simultaneously with moving the setting element into said shift position.
A device for a multi-stage gearbox of an agricultural machine comprising:
- a shifter rod;
- a locking element for engaging and locking said shifter rod in a predetermined position;
- a setting element coupled to the locking element and moveable between at least two different positions relative to the locking element;
- a control device for setting the setting element in either of the two different positions relative to the locking element;
- and
- means for effecting the position of the setting element only when the speed of the agricultural machine falls below a predetermined level.
An agricultural machine having a ground speed control lever, and a device for a multi-stage gearbox comprising:
- a shifter rod;
- a locking element for engaging and locking said shifter rod in a predetermined position;
- a setting element coupled to the locking element and moveable between at least two different positions relative to the locking element;
- a control device for setting the setting element in either of the two different positions relative to the locking element;
- and
- means for effecting the position of the setting element only when the ground speed control lever is in a neutral position.
An agricultural machine having a braking device, and a device for a multi-stage gearbox comprising:
- a shifter rod;
- a locking element for engaging and locking said shifter rod in a predetermined position;
- a setting element coupled to the locking element and moveable between at least two different positions relative to the locking element;
- a control device for setting the setting element in either of the two different positions relative to the locking element;
- and
- means for applying a blocking force to the setting element when said braking device is actuated.
Dependencies are inferred from the claim text.