Jack overload monitoring device
A technology of monitoring device and jack, which is applied in the directions of safety device, transportation and packaging, load hanging element, etc., can solve the problem of large impact force, and achieve the effect of reducing impact force, high safety, and avoiding damage to the mechanism.
Inactive Publication Date: 2021-11-16
周杰
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Problems solved by technology
[0004] According to at least one disadvantage of the prior art, the present invention proposes a jack overload monitoring device to solve the problem that the existing overload monitoring device has a large impact force after detecting overload and braking
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[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0048] Such as Figure 1 to Figure 10 As shown, a kind of jack overload monitoring device 2 of the present invention is used for the overload monitoring of the jack when hoisting heavy objects 5, and the jack is carried by the car body 1 and includes a boom 3, a hoisting mechanism (Fig. not shown) and steel rope 4, the present invention is installed in the middle part of boom 3, steel rope 4 is wound on the present invention after being pulled out from the ree...
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The invention relates to the technical field of hoisting machinery, in particular to a jack overload monitoring device. The device comprises a fixed shaft, a contraction mechanism, a triple transmission part, a central gear, a rotating disc and a transmission rack; the fixed shaft is arranged on a cargo boom; the contraction mechanism is rotatably mounted on the fixed shaft in a contraction manner; the triple transmission part comprises a first gear, a second gear and a third gear, and the third gear is mounted on the contraction mechanism; the central gear can be meshed with the second gear; the rotating disc is rotationally arranged on the fixed shaft; and the transmission rack is arranged on the rotating disc, the outer end of the transmission rack is meshed with the first gear, and the inner end of the transmission rack can be in friction transmission with the fixed shaft. When the contraction mechanism contracts until the central gear is meshed with the second gear, a hoisting mechanism stops, so that a heavy object does decelerated motion before the hoisting mechanism is cut off, and the impact force of reverse falling of the heavy object after braking is reduced; and then the contraction mechanism rotates reversely until the inner end of the transmission rack is tightly ejected and then stops rotating, so that the heavy object stops stably after descending slightly, and the impact force is further reduced.
Description
technical field [0001] The invention relates to the technical field of hoisting machinery, in particular to an overload monitoring device for a hoist. Background technique [0002] Cranes are multi-action hoisting machines that can vertically lift and horizontally transport heavy objects within a certain range. Because they can greatly reduce human labor and are easy to use, they are more and more widely used in the market. During the process of hoisting heavy objects, due to the influence of factors such as wire rope wear, equipment fatigue, and unexpected conditions, the lifting load may exceed the rated load. At this time, the hoisting work should be stopped. Before the hoisting mechanism of the jack stops, the heavy object has an upward speed. After the sudden stop, the heavy object decelerates upward and then accelerates downward, which will produce impact load on the steel cable and boom, which is easy This will cause the wire rope to break and the heavy object to fal...
Claims
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Login to View More IPC IPC(8): B66C15/00B66C13/16
CPCB66C15/00B66C13/16
Inventor 周杰周红刘斌宋凯王向前
Owner 周杰