Variable-speed winch and foldable type onboard crane with same

Abstract

The invention relates to a variable-speed winch and a foldable type onboard crane comprising the same, relating to the field of winches. The variable-speed winch comprises a variable-speed mechanism, a driving shaft and a driven shaft, wherein the driven shaft is arranged on a stand of the variable-speed winch through a bearing and at the outer side of the driving shaft and is provided with a power output mechanism; the power output end of the driving shaft is provided with a gear locating slot, and the corresponding driven shaft is provided with a locating pin; the locating pin is arranged on the end part of the driving shaft or in the gear locating slot; the variable-speed mechanism comprises a center wheel and a planet wheel; the part of the driving shaft, which is close to the planet wheel, is provided with a radially outwards raised outer spline, and the inner surface of the corresponding variable-speed mechanism is provided with an inner spline; the inner wall of the driven shaft is provided with an inner spline in clearance fit with the outer spline of the driving shaft; and the outer spline of the driving shaft is respectively meshed with the inner spline of the variable-speed mechanism and the inner spline of the driven shaft to form multi-gear variable-speed transmission. The variable-speed winch can realize variable speed of at least two gears and has the advantages of simple structure, convenience for operation, good speed varying effect, small mass and high transmission ratio; and in addition, the foldable type onboard crane with the variable-speed winch has small size and high lifting capacity.

Description

technical field [0001] The invention relates to a hoist, in particular to a speed-variable hoist and a foldable truck-mounted crane comprising the hoist. Background technique [0002] At present, most logistics vehicles and engineering vehicles need to be equipped with light-duty truck-mounted cranes, but due to the lack of better products, they are rarely installed on vehicles. The main reason is that the products take up a lot of space, or the crane itself is too heavy, the cost is high, and the lifting capacity is low. Poor, driving vibration, etc. cannot adapt to the special requirements of freight and construction vehicles, so they cannot be promoted. The invention patent No. ZL 200410085501.0 applied by German Herbert Knorr in China, named "motor vehicle cargo lift", consists of door-shaped outer support, load support, pulley block with locking device, traction wire rope, hook, etc. The vertical rods and upper cross bars on both sides of the outer support are fixed on...

AI Technical Summary

Problems solved by technology

[0004] In short, the defects of the truck-mounted cranes in the prior art are: they are large in size, cannot be folded well or cannot be folded, and take up a lot of space; Characteristics, in order to achieve the ideal lifting capacity, the quality of the vehicle must be increased, which increases the additional load of the vehicle and its own cost. This is the main reason why it cannot be promoted; the speed of the reducer used by the crane is single and cannot adapt to the lightness of the cargo in the lifting work. Special requirements for transmission mechanism such as weight, lifting, lowering, speed, etc.

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