Hydraulic distance adjusting fork for forklift truck

Abstract

The invention discloses a hydraulic distance adjusting fork for a forklift truck. The hydraulic distance adjusting fork comprises a distance adjusting frame arranged on a lifting frame on the front side of the forklift truck and two L-shaped forks which can adjusting the opening and closing distance on the distance adjusting frame. The distance adjusting frame is provided with a guide rod which ishorizontally arranged, and a cylindrical guide sleeve matched with the guide rod is fixed to the tops of perpendicular parts of the forks. Lubricating grease is smeared to the inner ring of the guidesleeve and the guide rod, and the upper portion and the lower portion of the rear side of the perpendicular parts are provided with upper hooks and lower clamping grooves correspondingly. Distance adjusting oil cylinders which are opposite horizontally are arranged on the two sides of the distance adjusting frame, and a sliding rod which is horizontally and transversely arranged is arranged on the lower side of the distance adjusting frame. The tail ends of output rods of the two distance adjusting oil cylinders are hinged to the two hooks, and the lower side of the sliding rod is clamped inthe lower clamping grooves. Due to the fact that the hydraulic distance adjusting oil cylinder is used for directly driving the series forks for stepless distance adjustment, the front suspension distance of the forklift truck is shortened, and the carrying capability is greatly improved; and the product structure is relatively simple, the friction resistance is small, losses can be reduced to themaximum degree, and therefore energy conversion is completed.

Description

Technical field [0001] The invention relates to the technical field of hoisting machinery, in particular to a forklift adjustable-pitch fork. Background technique [0002] Forklifts are widely used in port terminals and open-air cargo yards for medium-sized cargo handling and lifting and container operations. In many working conditions, operators need to use manpower to properly adjust the fork opening and closing range to adapt to the handling of different sizes of cargo. Most of the forks use external chain plate drive and hook fork follow-up movement to adjust the pitch. The forklift has a long front overhang, which makes it impossible to increase the load. The chain drive movement of the chain sprocket makes the product structure more complex and energy loss It is also easy to obstruct the view of the forklift, which affects the safety of driving. In addition, the external chain plate transmission has poor pitch adjustment accuracy, poor stability during operation, and easy l...

AI Technical Summary

Problems solved by technology

[0002] Forklifts are widely used in medium-sized cargo handling and container operations in ports, open-air cargo yards. In many working conditions, operators need to use manpower to properly adjust the opening and closing range of the forks to adapt to the handling of cargo of different sizes. Most of the forks are driven by external chain plates, and the distance is adjusted by the movement of the hook and the fork. The front overhang of the forklift is long, so that the load cannot be lifted. Large, but also easy to block the vision of the forklift, affecting the safety of driving; in addition, the distance adjustment accuracy of the external chain plate transmission is poor, the stability is poor during operation, and it is easy to loosen, which also causes great wear and tear on the connecting parts and reduces the service life of the fork

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