Arm type aerial work platform drive axle
There are two main types of boom-type aerial work platform drive axles, one is a split drive axle such as special reinforced welding legs, steering connecting discs, drive motors and traveling reducers;
The second type is an integrated drive axle. Under the same specifications, the total transmission efficiency and climbing ability of the two are the same, because they are both hydrostatic transmission in essence, and one or two parts less do not determine the overall transmission efficiency. Therefore, if you want a higher walking speed or climbing degree, you need a more powerful engine and consume more fuel.
Advantages and disadvantages of split drive axle
Advantages of split drive axle:
1. Low cost, because it can be designed according to the characteristics of the aerial work platform, so that the local structural parts are strong enough, and the hydraulic motor (or motor) and reducer of the walking drive can meet the driving requirements.
2. Good versatility, because there are only two core components of the motor + reducer combination for boom cars ranging from 15 meters to 46 meters. Only these two components need to be maintained and replaced, while structural parts almost never need maintenance And replaced.
3. The maintainability is good, because the hydraulic motor and the reducer are disassembled and installed separately, and the hydraulic motor and the reducer are individually maintainable.
4. The cost of spare parts and maintenance is low, because the hydraulic motor and the reducer are highly interchangeable, the social ownership is large, and there are many maintenance organizations and professionals.
5. It can be used in different meter heights of 15-57 meters, and can be adapted to the form of telescopic legs and swing legs.
6. Vehicles that can meet the special needs of customers, such as ultra-narrow and ultra-wide models.
7. The differential throttle valve of the diverting and collecting valve can meet the passing performance when slipping, self-adapting differential speed, low cost and high reliability. If an absolute differential lock function is required, a hydraulic differential valve can be added.
Disadvantages of split drive axle:
1. The installation is complicated and the number of parts is large.
2. The hydraulic system of the traveling drive is slightly complicated.
Advantages and disadvantages of integrated drive axle
Advantages of integrated drive axle:
1. The installation is convenient and simple, because the integrated type is highly integrated.
2. Simplifies part of the control of the hydraulic system of the walking drive, because the front and rear axle drives are connected through the drive shaft, and the left and right wheels are transmitted through the internal gears and shafts of the axle.
3. Mechanical differential lock, lock the left and right wheels or the front and rear axles when the tire is slipping.
Disadvantages of integrated drive axle:
1. The cost is 20% more expensive. Although some hydraulic parts are missing, the specifications of the axle must be too large, because the load bearing of the single axle head of the high-altitude platform changes with the rotation of the turntable, and the load range is 0-70% of the whole vehicle , The safety factor of axles used in other construction machinery is lower than that of aerial work platforms. To achieve the same safety factor, a large-size axle must be selected, so it is extra thick and the cost is naturally high.
2. Poor versatility, because the height of the boom truck ranges from 15 meters to 56 meters, its mass ranges from 7 tons to 23 tons, and the load-bearing requirements of the axles range from 15 tons to 50 tons. Therefore, different specifications must be used in terms of cost and economy. Otherwise, the cost is high.
3. Poor maintainability, because of the high degree of integration, it needs to be disassembled or hoisted during maintenance.
4. The cost of spare parts and maintenance is high, because the parts are too specific, the market is small, and the versatility and interchangeability are poor. The manufacturer's professionals are required to use proprietary spare parts and tools for maintenance.
5. It cannot be used on aerial work platforms with a platform height of more than 30 meters, because they cannot be extended or expanded to provide a large support area.
Poor maintainability of integrated axle
Split (Win) VS Integrated
So in summary, most mainstream 名媛直播 on the market now use split drive axles. Choosing a split drive axle will save you a lot of cost, and good versatility and applicability will make your boom truck work more efficiently with half the effort.
