Principle of Electric Lifting Rod

Product introduction

Nanjing Xueton Technology Co., Ltd.Development and Production of Lead Screw Drive Electric lifting rodObtained the national invention patent and passed the military appraisal, inspection and design finalization. It is suitable for lifting antenna, lighting, photography, lightning protection, environmental monitoring and other equipment. At present, the electric lifting pole products have been widely used in the army, military, people's safety, transportation, radio and television, civil aviation, exploration, scientific research, disaster relief, forest fire prevention and so on. Fields.

I. Overview

The electric lifting rod driven by lead screw is a lifting device specially designed for antenna or related equipment under various environmental conditions. It can be used in vehicle or fixed on the ground. Its rod body is made of aluminium alloy and has two lifting modes, electric/manual. The principle of synchronous lifting of each rod body is driven by synchronous screw driving mode of each screw. It can work reliably at any height within the specified elevation. Its unique working principle, mechanical transmission form and novel structural design make it possible for the rod body to work reliably at any elevation. Compared with other similar electric lifting poles, it has better orientation, faster lifting speed, smaller size, larger working load, easier operation method, stronger installation and fixing, stronger stability, reliability and safety.

At present, this kind of electric lifting rod has formed a series of products, such as 5m, 7m, 9m, 12m, 15m and 18m, which can meet various needs of different users.

II. Structural Composition and Working Principle

The electric lifting rod of screw drive is mainly composed of 220V AC motor, reducer gear pair, screw drive pair, aluminium alloy square tubular rod body and motor gear pair shell, lifting control switch, electric/manual conversion switch, limit switch, safety and handle, steel wire pull rope, etc. The structure is shown in the figure (taking the 7m electric lifting rod as an example):

Basic working principle: In the lifting rod body, threaded screw with different diameters is accurately fitted together with the rod body through nuts and seat sleeves and rotates freely to form threaded motion pairs. When working, the reducer gear pair is driven by alternating current motor (or hand-rocking), which drives all threaded screw to rotate synchronously. The screw rotating motion of the transmission pair is transformed into the straight line motion of the rod body through the nut and seat sleeve, thus the lifting rod can be lifted and lowered.

Main Technical Indicators

1) Initial height: 1.5-2.4m

2) Maximum increase: 5-18m

3) Lifting time: 3-4 minutes

4) Maximum load: 50-80 kg

5) Operating voltage: AC220V & plusmn; 20%-50Hz & plusmn; 5%

6) Motor power: 300-800W

7) Working Temperature: -45 ~55

8) Storage Temperature: -50 ~70

9) Product self-weight: 54-150 kg

10) Reliability: 5000 successive runs without failures

11) Maintainability: Maintenance time at grass-roots level is less than 1.5h

12) Service life: more than 10 years in normal use

13) Wind resistance: 6-level wind energy can rise and fall freely, 10-level wind energy can work normally after all layers of cable are tightened, 12-level wind is not damaged.

IV. COMPARATIVE ADVANTAGES WITH OTHER LIFTING ROD

At present, there are many types of lifting rods used in domestic production, including electric, hydraulic, pneumatic and manual driving, and square tubular, cylindrical and pyramidal shape in shape and structure. Different types of lifting rods have their own characteristics, according to the different conditions and requirements of use, they have their own scope of adaptation.

From the actual use of various lifting rods in China, the problems and defects of different products are also different. For example, hydraulic and pneumatic lifting rods are susceptible to high and low temperature climate, and pressure varies greatly. Oil leakage and air leakage often occur due to sealing gasket problems, which affect normal work. Special cases also include Sudden loss of pressure will lead to rapid decline, resulting in accidents or damage to equipment, interruption of work; the two are also expensive because of complex structure. The pneumatic driving load is small. When it rises or falls, it will produce instantaneous impact and work unsteadily. Cylindrical lifting poles are easy to rotate and fix the direction of antenna or equipment; secondly, the cylinder is not easy to fix tightly with the body; there is a cylindrical hand-operated lifting pole in China, which sets multiple cylinders together and uses wire rope to connect and drive, so it can only work at the top, and can not be locked in the middle position. Work; and the wire rope is also very easy to wear and tear, and is not easy to be found, and there are often accidents of the lifting rod sliding rapidly because of the sudden break of the wire rope. Other lifting rods are not driven enough (such as hydraulic pressure, air pressure) or hand-operated wire rope dropping. When there is strong wind, the rod body bends and deforms or freezes in cold weather, it is easy to get stuck and can not drop; some are not tightly sealed, and it is very easy to be stuck in sand and dust weather and can not rise or fall, and so on.

Nanjing Xuetian Science and Technology Co., Ltd. combines domestic practical experience, absorbs foreign advanced technology, develops and manufactures transmission electric lifting rod, completely abandons the traditional lifting principle, adopts a new synchronous driving mode of lead screw, supplemented by scientific design concept, overcomes the above disadvantages, and becomes a product of the same kind. A lover.

The electric lifting rod driven by lead screw is mainly driven by electricity or by hand. The conversion between the two modes is convenient. It uses special aluminium alloy material as the main body, steel is equivalent to steel, but its proportion is two-thirds lighter than steel. Compared with other lifting poles, the main features and advantages are as follows:

(1) Strong bearing capacity

Its own weight is relatively light, its shape size is relatively small and its lifting weight is relatively large. At present, the maximum lifting weight of the commonly used 7m and 9m electric lifting poles can reach 100kg. Wind resistance and lateral tension tests meet the requirements of the indicators.

(2) Fast lifting speed

The driving electric lifting rod rotates synchronously with each screw set, which drives the automatic lifting of each rod body. Compared with other lifting rods, the lifting speed is faster and the efficiency is higher.

(3) Automatic locking at any height

Because of the use of reducer gears and threaded screw drive, the helical angle of lifting is smaller in design, so it can accurately ensure that the electric lifting rod automatically and firmly locks at any height during the effective travel, and will not produce sliding displacement.

(4) Steady and reliable lifting

According to different specifications, the number of segments of electric lifting rod driven by lead screw is divided into 4 to 7 segments, which has novel structure and reasonable compactness. Mechanical transmission, such as motor-driven reducer gear, is equipped with electronically controlled limit device, mechanical limit device and insurance. It can lift smoothly and smoothly, run reliably, reach the maximum rise or fall value or operate artificially by mistake. It can stop automatically and effectively protect equipment and components from damage.

(5) Good orientation of equipment and stronger loading

The rod body of electric lifting rod driven by lead screw adopts square tube shape, which overcomes the problem of rotation of circular tube body, and makes the orientation of antenna or other equipment fixed more firmly and accurately. In addition, when loading, the problem that the cylinder and the car body can not be closely attached and fixed is avoided.

(6) Consistency of lift drive

The electric lifting rod driven by lead screw adopts the same lifting mode with the same driving force. When the whole lifting rod is bent by strong wind and frozen in severe cold weather, it can still rely on strong driving force to drop from below.

(7) Three-proof and good sealing

In order to ensure long-term field work better "moisture-proof, salt fog-proof and mildew-proof", effective protective layer is coated inside and outside the electric lifting rod (including inside and outside each rod) of TCP110 square-tube lead screw drive, and "three-proof" treatment is carried out. And each link is sealed with sealing cushion and rubber seal. The water, ice and sand prevention performance of the lifting pole is good. It avoids many kinds of waterproof lifting poles, and corrodes or freezes in winter, which makes the lifting pole unable to work and shorten its life. Because it can not prevent sand and dust, the lifting pole is stuck and malfunctioning.

In summary, compared with similar domestic products, TCP110 square tube lead screw drive electric lifting rod is advanced in technology and mature in technology. It has test data and a large number of successful examples. It is suitable for the current requirements of antenna and other equipment, and is a product with good performance and price.

This series Lifting rodDriven by trapezoidal screw, the lifting process is stable and reliable, and has the function of self-locking at any position.
The bar with square cross section is adopted with good orientation and bending and torsion resistance.
Each link body realizes linkage mechanism, and the lifting time is short. It can be operated electronically and manually, and it is easy to operate by hand.
When lifting and lowering, there is a precise positioning mechanism, which eliminates the clearance between the rods and ensures the minimum swing and torsion of the rod body when it is in place.
Sealed rubber seals are used between each rod. The lifting rod has good water, sand and ice resistance. Each rod is protected by coating both inside and outside, and the outer surface is protected by paint layer. Therefore, the three-proof performance of long-term field work is good.
Because the pole body is rigid and strong, it can work independently, so it does not need to use wind rope protection when working, which greatly reduces the requirement of using position for lifting pole and saves human hands.
The lifting rod is equipped with wire frame, hand handle and other accessories. The position of hand handle can be selected according to user's needs, and the installation dimension of upper flange can be customized according to user's requirements.
At present, the electric lifting rod is divided into standard lifting rod and intelligent lifting rod. Among them, the standard lifting pole is the basic function to satisfy the lifting, lowering, stopping and provide up-and-down signals. The installation size and shape size of the intelligent lifting pole are the same as those of the standard type. It is mainly different from the control aspect in that it can provide high display (display accuracy is 100 mm), fault alarm, CAN bus, RS485 serial port and signal output. Fault storage and other functions.

Common specifications: