Hydraulic Main Valve and Auxillary Valve

• US 20120125459A1
• Filed: 06/23/2010
• Published: 05/24/2012
• Est. Priority Date: 06/24/2009
• Status: Active Grant

• Current Assignee: Nordhydraulic AB (HYDAC International GmbH)
• Original Assignee: Nordhydraulic AB (HYDAC International GmbH)
• Inventors: Lundgren, Bertil
• Granted Patent: US 8,905,077 B2
• Time in Patent Office: Days
• US Class Current: 137/565.01
• CPC Class Codes: E02F 3/96 with arrangements for alternate or simultaneous use of different digging elements E02F3/7604, E02F3/769, E02F3/78 take precedence; quick-acting devices to connect tools to arms or booms E02F3/3609, for arms to tractors or the like E02F3/627
• CPC Class Codes: E02F 9/2267 Valves or distributors position of valves arrangements on upper-structures E02F9/0875
• CPC Class Codes: F15B 13/0825 the modular elements being mounted on a common member, e.g. on a rail
• CPC Class Codes: F15B 13/0871 Channels for fluid
• CPC Class Codes: F15B 13/0896 using different types or sizes of valves
• CPC Class Codes: F16L 41/12 using attaching means embracing the pipe
• CPC Class Codes: Y10T 137/85938 Non-valved flow dividers
• CPC Class Codes: Y10T 137/85978 With pump
• CPC Class Codes: Y10T 137/86574 Supply and exhaust

Abstract

The present invention relates to a hydraulic auxiliary valve device (1) adapted to be connected to a hydraulic main valve (20) on a work vehicle, which work vehicle comprises a hydraulic system comprising a pump and a tank, the auxiliary valve device (1) comprises:—a first motor port connection (4A) and a second motor port connection (4B) arranged to be connected to a first motor port and a second motor port, respectively, on a double acting hydraulic motor, in particular a double acting hydraulic cylinder,—a pump lead-through (2), which connects the pump input port connection (2A) of the auxiliary valve device (1) to the pump connection output port (2B);—a tank lead-through (3), which connects the tank input port connection (3A) of the auxiliary valve device (1) to the tank connection output port (3B); and—a control valve (IA) provided with two open positions, which control valve (1A) in the first open position connects the pump input port connection (2A) to the first motor port connection (4A) and the tank input port connection (3A) to the second motor port connection (4B), and in the second open position connects the 12 pump input port connection (2A) to the second motor port connection (4B) and the tank input port connection (3A) to the first motor port connection (4A).

Claims

1. Hydraulic auxiliary valve device adapted to be connected to a hydraulic main valve on a work vehicle, which work vehicle comprises a hydraulic system including a pump and a tank, the auxiliary valve device comprising:

a first motor port connection and a second motor port connection arranged to be connected to a first motor port and a second motor port, respectively, on a double acting hydraulic motor, in particular a double acting hydraulic cylinder,

an inlet connection adapted to be connected to a hydraulic system on the work vehicle, which inlet connection comprises a pump input port connection, for connection to the pump of the hydraulic system, and a tank input port connection for connection to the tank of the hydraulic system;

an outlet connection adapted to be connected to the main valve, which outlet connection comprises a pump connection output port for connection to a pump input port on the main valve, and a tank connection output port, for connection to a tank input port on the main valve;

a pump lead-through, which connects the pump input port connection of the auxiliary valve device to the pump connection output port;

a tank lead-through, which connects the tank input port connection of the auxiliary valve device to the tank connection output port;

a control valve provided with two open positions, which control valve in the first open position connects the pump input port connection to the first motor port connection and the tank input port connection to the second motor port connection, and in the second open position connects the pump input port connection to the second motor port connection and the tank input port connection to the first motor port connection.

2. Hydraulic auxiliary valve device according to claim 1, wherein the pump lead-through consists of a first nipple and the tank lead-through consists of a second nipple, each of the nipples having two ends, which constitute the connection ports of the respective lead-throughs.

3. Hydraulic auxiliary valve device according to claim 2, wherein the nipples between their ends comprises openings arranged for connection to the control valve to connect the pump input port connection and the tank input port connection to the motor port connections of the auxiliary valve device.

4. Hydraulic auxiliary valve device according to claim 3, wherein the nipples are detachable in respect to a main part of the auxiliary valve device and each comprising a shoulder, which are adapted to bear against corresponding shoulders on said main part when connected correctly.

5. Hydraulic valve set comprising an auxiliary valve device according to claim 1, and a main valve for connection to the auxiliary valve device, which main valve comprises a first and a second pair of motor port connections, each comprising a first motor port connection and a second motor port connection arranged to be connected to a first motor port and a second motor port, respectively, on the respective double acting hydraulic motors, characterized in that the main valve has an inlet connection arranged to be connected to a hydraulic system on the work vehicle, either directly or via the main valve, the inlet connection comprises a pump connection port for connection to the pump of the hydraulic system, and a tank connection port for connection to the tank of the hydraulic system, which ports are designed to fit to the pump connection output port and the tank connection output port, respectively, of the auxiliary valve device.