Valve switching by taking on cargo
The mechanism allows agricultural implements to switch hydraulic functions using the load, eliminating the need for additional control units and reducing accident risks by converting linear to rotary movement for safe and efficient operation.
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2026-02-11
- Publication Date
- 2026-04-09
AI Technical Summary
Agricultural implements on vehicles like front loaders and telescopic handlers often require multiple hydraulic functions but lack a direct electrical connection for controlling solenoid valves, leading to inefficient manual switching and increased accident risks during frequent operations.
A mechanism that uses the load being picked up to switch between hydraulic functions, eliminating the need for additional control units or solenoid valves by converting linear movement into rotary movement to operate standard 3/2-way valves manually.
Enables vehicles with a single double-acting control unit to perform two hydraulic functions safely and efficiently without electrical connections, reducing the risk of accidents during frequent switching operations.
Smart Images
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Abstract
Description
[0001] There are already machines where the load being picked up actuates a hydraulic shut-off valve, but none yet where the load changes the hydraulic oil flow of a standard 3 / 2 way valve.
[0002] Agricultural implements for front loaders, wheel loaders, and telescopic handlers often require multiple hydraulic functions. Since these vehicles frequently only have a double-acting control valve on the loading arm, additional hydraulic functions on the implement are switched via an extra solenoid valve. However, an electronic connection for controlling the solenoid valve is rarely available on the loading arm. Alternatively, the hydraulic function could be switched manually on the implement. With frequent switching operations, as is sometimes necessary, this is unnecessarily time-consuming and introduces a certain risk of accidents due to careless mounting and dismounting of the vehicle.
[0003] The invention specified in claim 1 is based on the problem of creating a way to switch between two hydraulic functions using the load being picked up.
[0004] This problem is solved by the features listed in claim 1.
[0005] The invention enables carrier vehicles with only one double-acting control unit and no electrical connection on the loading arm to use a work device with two double-acting hydraulic functions. Since the hydraulic function is switched by the load, no additional control units or solenoid valves are required. Furthermore, in work processes that require frequent switching of the hydraulic function, the risks associated with getting on and off the loading vehicle are significantly reduced in the often fast-paced work environment.
[0006] The following drawings show the assembly in both working positions and the individual components are marked with position numbers. Fig. 1: Position in unloaded state (basic position) Fig. 2: Position when loaded Fig. 3: Top view
[0007] The figures show the changeover valve with its individual components. When fully loaded, the load presses against the stop (item 3). The stop is guided in the guides (item 6) by the two parallel shafts (item 4). The linear movement is converted into a rotary movement by the plunger (item 2) and the valve lever (item 7). This rotary movement is necessary to switch standard 3 / 2-way valves (item 1) with manual operation. As soon as the load is loaded and the valve is switched, a different hydraulic function can be used. When the load is released, the two springs (item 5) push the stop forward to its original operating position, and the valve switches back. Reference symbol list 1 3 / 2-way valve 2 pestles 3 stops 4 wave 5 springs 6 Leadership 7 valve levers