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hydraulic lifting equipment

A lifting equipment and hydraulic technology, applied in the direction of hoisting device, clockwork mechanism, etc., can solve the problems of easy rusting and failure of limit valve, small practical scope, high price and cost, and achieve easy maintenance, strong practicability, low cost effect

Inactive Publication Date: 2015-12-02
余小兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its typical representative is such as the patent number: ZL200520111759.3. The cam type lifting device is a typical representative. Its hydraulic limit is limited by connecting the limit valve with the LS port in the working oil circuit of the manual proportional valve. Although the adjustment is convenient, but The price is high, the practical range is small, the pipeline is long, and the limit valve is exposed to the outside, which is easy to rust and fail! In addition, the proportional valve itself has high requirements, and its practical range is small. It is only suitable for the proportional valve with LS port in the working oil circuit of manual proportional valve, which is much more expensive than the proportional valve of the same specification without LS port.
There are also some brands of proportional valves that do not have an LS port in the working oil circuit, so there is no way to lift up and down to limit the position

Method used

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Experimental program
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Effect test

Embodiment 1

[0023] like Figure 1-5 As shown, a hydraulic lifting device includes a lifting balance valve block 1, a lifting motor 2, a reducer 3, a reel 4 and a stroke limiter 5, and the lifting balancing valve block 1 controls the lifting motor 2 The lifting motor 2 drives the rotation of the reel 4 through the reducer 3, and the stroke limiter 5 is fixed on the side of the reel 4 to control the state of the lifting balance valve block 1 according to the position of the reel 4. The present invention sets the stroke of the lifting equipment through the stroke limiter 5; when the limit position is reached, the oil circuit in the lifting balance valve block 1 is controlled to cut off the oil entering the lifting motor 2 to realize the limit function of the equipment.

[0024]In order to improve the accuracy and reliability of the limit position, the reducer 3 includes a brake pad 6, and the lifting balance valve block 1 includes three oil ports, which are oil port A, oil port B, and oil po...

Embodiment 2

[0032] like figure 1 , 2 , 6, a hydraulic lifting equipment, including a lifting balance valve block 1, a lifting motor 2, a reducer 3, a reel 4 and a stroke limiter 5, the lifting balance valve block 1 controls the lifting The action of the motor 2, the lifting motor 2 drives the rotation of the reel 4 through the reducer 3, and the stroke limiter 5 is fixed on the side of the reel 4 to control the state of the lifting balance valve block 1 according to the position of the reel 4 . The present invention sets the stroke of the lifting equipment through the stroke limiter 5; when the limit position is reached, the oil circuit in the lifting balance valve block 1 is controlled to cut off the oil entering the lifting motor 2 to realize the limit function of the equipment.

[0033] In order to improve the accuracy and reliability of the limit position, the reducer 3 includes a brake pad 6, and the lifting balance valve block 1 includes three oil ports, which are oil port A, oil ...

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Abstract

The invention disclose hydraulic lifting equipment, which comprises a lifting balance valve block, a lifting motor, a speed reducer, a winding drum and a stroke limiter, wherein the lifting balance valve block is used for controlling the action of the lifting motor; the lifting motor is used for driving the winding drum to rotate through the speed reducer; and the stoke limiter is fixed on one side of the winding drum, and is used for controlling the state of the lifting balance valve block according to the position degree of the winding drum. The hydraulic lifting equipment has the beneficial effects of high limiting accuracy and reliability, high acting sensitivity, easiness and convenience in debugging, easiness in maintaining, durability, convenience in installing, low cost and high practicability.

Description

technical field [0001] The invention relates to a hydraulic lifting device, in particular to a hydraulic lifting device with a stroke limiting device. Background technique [0002] At present, general hoisting equipment is equipped with a stroke limiter, and there are several types of lift stroke limiters commonly used in hoisting machinery safety protection devices, such as hammer type, coded type, and transmission type. The hammer-type lifting stroke limiter adopts the principle that the hook collides with the lever when the lifting limit is reached to make the hammer balance switch action, which has the disadvantages of easy damage, poor reliability, and large maintenance. The encoder of the coded lifting stroke limiter is connected to the shaft of the reel, and the output pulse code accurately represents the rotation number and angle of the reel. It also has the disadvantages of poor reliability, large maintenance, and high cost. The reducer of the transmission-type lif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66D1/08B66D1/56
Inventor 余小兵
Owner 余小兵