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Hydraulic lifting equipment

A kind of lifting equipment and hydraulic technology, which is applied in hoisting devices, spring mechanisms, etc., can solve the problems of easy rust and failure of limit valves, small practical range, high price and cost, and achieve easy maintenance, strong practicability, low cost effect

Inactive Publication Date: 2013-03-13
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: ZL 200520111759.3 The cam type lifting device is a typical representative, and 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, the price High cost, small practical range, long pipeline, exposed limit valve, 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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Embodiment 1

[0023] Such as Figure 1-5 As shown, a hydraulic lifting equipment includes 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 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. In the present invention, the stroke limiter 5 sets the stroke of the lifting equipment; when the limit position is reached, the oil path 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, the reducer 3 includes a brake pad 6, and the lifting balance valve block 1 includes three oil ports, namely oil port A, oil port B, and oil port H. The oil port ...

Embodiment 2

[0032] Such as 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 . In the present invention, the stroke limiter 5 sets the stroke of the lifting equipment; when the limit position is reached, the oil path 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, the reducer 3 includes a brake pad 6, and the lifting balance valve block 1 includes three oil ports, namely oil port A, oil port B, and oil port ...

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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 equipment, in particular to a hydraulic lifting equipment with a stroke limit device. Background technique [0002] At present, general lifting equipment is equipped with a stroke limit device. The commonly used lifting stroke limiters in the safety protection devices of hoisting machinery include heavy hammer type, coding type and transmission type. The heavy hammer lifting stroke limiter adopts the principle that the hook hits the lever to make the heavy hammer balance switch action when the hook is at the ascent limit. It has disadvantages such as easy damage, poor reliability, and large maintenance. The encoder of the coded lifting stroke limiter is connected to the reel shaft, and the output pulse code accurately represents the number of revolutions and angles of the reel. It also has the disadvantages of poor reliability, large maintenance, and high cost. The reducer of the transmission type lifting stroke...

Claims

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Application Information

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IPC IPC(8): B66D1/08B66D1/56
Inventor 余小兵
Owner 余小兵