Difficulty-overcoming device for simultaneously releasing and braking two brakes of building hoist
A technology of construction elevators and brakes, which is applied in the field of elevators, can solve problems such as the suspension cage hitting the bottom, low safety factor, and failure of the brake release test, and achieves the effect of broad application prospects, ideal effects, and reliable technical support
Inactive Publication Date: 2015-03-18
GUANGXI SPECIAL EQUIP SUPERVISION & INSPECTION INST P R CHINA
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Problems solved by technology
In November 2012, we inspected a relocated SC200 / 200 dual-purpose construction elevator for people and goods at the construction site in this area. During the inspection of the left cage, the gate release test operated by the installer failed. Bottom crash occurred
In the traditional method of releasing only one brake operation to solve the problem, the braking force of the elevator driven by two motors is only half of the design value; for the elevator driven by three motors, the braking force is only one-third of the design value First, the safety factor is very low
Method used
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[0022] Below in conjunction with accompanying drawing and embodiment the present invention is further described:
[0023] refer to Figure 1 to Figure 3 As shown, a device for simultaneously releasing and braking two brakes of a construction elevator includes a drive motor rear end cover, a pry bar, a U-shaped joint, and a total handle, wherein the two ends of the total handle 13 Use the bolt 12 to hinge the U-shaped joint 11, and the described U-shaped joint 11 connects one end of the two crowbars 9 with the hinged bolt 10, and the other ends of the two crowbars 9 pass through two pressure plate fixing screws 7 and pressure plate return spring 8 respectively. 1. The wing nut 6 and the pressure plate 5 are pre-installed together, and the end of the pry bar 9 and the pressure plate 5 retain a gap equivalent to the thickness of the original short handle 2, and the two pre-installed part ends of the pry bar 9 are respectively inserted into the two On the upper and lower surfaces...
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The invention relates to the field of the application, production, installation, maintenance and inspection of construction lifts, in particular to a relief device allowing two brakes in a construction lift to loose and brake at the same time. The relief device is characterized in that a four-link mechanism comprises a linkage composed of two lever mechanisms. The two lever mechanisms are characterized in that original short handle lever mechanisms of the two motor brakes are connected with two crow bars respectively so as to lengthen power arms to save efforts. A line of lever action spots of rear end covers of two motors serves as a first link; a second link and a fourth link are two lengthened crow bars; a third link is a master handle; the links are all connected in a hinged manner. Therefore, the two lever mechanisms and the linkage of the four-link mechanism are formed. When pull force is applied out from the master handle, the two crow bars rotate around fulcrums of respective lever mechanisms immediately, and the two brakes loose at the same time. When the master handle is released, the two brakes brake immediately.
Description
technical field [0001] The invention belongs to the field of lifts, in particular to a trouble-relieving device for simultaneously releasing and braking two brakes of a construction lift. Background technique [0002] At present, with the development of high-rise buildings, more and more construction elevators are used. Domestic construction elevators are mostly SC type, usually equipped with 2 or 3 driving motors, and each motor is equipped with a brake. Therefore, it usually has 2 or 3 brakes. However, when the power is cut off due to a fault, the device for releasing the brake and moving down the cage to relieve the difficulty adopts a single brake release operation mode, and the other brake is forced to open with a screw in advance, and only one brake is used for braking. Unreliable, the hanging cage is prone to safety hazards of hitting the bottom. Moreover, the brake release device equipped in the past is not perfect. The handle of the original single-brake brake re...
Claims
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IPC IPC(8): B66B5/02B66B7/00
CPCB66B5/02B66D5/24
Inventor 陈春潮陈源郭凯谢东明黄冀陈永继鞠成伟
Owner GUANGXI SPECIAL EQUIP SUPERVISION & INSPECTION INST P R CHINA