Tilt control system of forklift
The tilt control system for forklifts decelerates piston operations using a pressure reducing valve, addressing shock and synchronization issues, thereby improving durability and reducing fatigue.
AU2025203398A1Pending Publication Date: 2026-07-23DOOSAN BOBCAT KOREA CO LTD
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Patent Information
- Authority / Receiving Office
- AU · AU
- Patent Type
- Applications
- Current Assignee / Owner
- DOOSAN BOBCAT KOREA CO LTD
- Filing Date
- 2025-05-12
- Publication Date
- 2026-07-23
AI Technical Summary
Technical Problem
Existing forklift tilt systems experience shock due to sudden piston stops at the end of the tilt cylinder stroke, leading to durability issues and difficulty in synchronizing multiple tilt cylinders.
Method used
A tilt control system that decelerates the piston operation by linking the tilt cylinder with a pressure reducing valve in the pilot hydraulic circuit, reducing system costs and improving durability through a simple structure without additional components.
Benefits of technology
The system effectively mitigates shock, reduces operator fatigue, and facilitates easy synchronization of multiple tilt cylinders, enhancing the forklift's operational efficiency and longevity.
✦ Generated by Eureka AI based on patent content.
Smart Images
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Abstract
A tilt control system of a forklift includes a main hydraulic line, which includes a tilt cylinder configured to tilt a mast forward or backward, and a direction control valve configured to control a tilt direction of the mast, and a pilot hydraulic line, which 5 includes a remote control valve connected to the direction control valve and configured to control the direction control valve, and a pressure reducing valve provided between the direction control valve and the remote control valve, wherein the pressure reducing valve includes a push rod configured to be displaced by one end being pressed or released by the tilt cylinder, the pressure reducing valve configured to reduce pressure 10 at a rear end of the pressure reducing valve on the pilot hydraulic line according to a displacement of the push rod when a tilt angle of the mast exceeds or is less than a preset angle range.20 25 20 33 98 12 M ay 2 02 5 2 0 2 5 2 0 3 3 9 8 1 2 2 0 2 5 M a y - 1 / 10 - FIG 1. - 1 / 10 - FIG 1. 0=0 0=0MIN 0<0 0>0 0=0MAX 10 103 101 102 8310 100 300-1 ML2-1 ML2-2 40 200 ML3 ML1 PL2-1 PL1 M 20 310 PL2-2 300-2 50 30 20 25 20 33 98 12 M ay 2 02 5 1 1 0 2 0 2 5 2 0 3 3 9 8 1 2 2 0 2 5 M a y 0 = 0 M I N = 0 M A X 1 0 2 3 1 0 1 0 0 O W 3 0 0 - 1 M L 2 - 1 M L 2 - 2 W - M W o 4 0 2 0 0 M L 3 M L 1 P L 2 - 1 P L 1 W T 3 1 0 P L 2 - 2 3 0 0 - 2 W 5 0 3 0
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