Arm type aerial work platform drive axle
There are two main types of drive axles for arm aerial work platforms. One is a dedicated reinforced welding outrigger, steering connecting disc, drive motor plus walking reducer and other split drive axles.
Split drive axle
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 essentially hydrostatic transmissions, and the lack of one or two parts does not determine the overall transmission efficiency. So if you want a higher walking speed or grade, you need a more powerful engine and consume more fuel.
Integrated drive axle
The advantages and disadvantages of split drive axle
The 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 the arm truck from 15 meters to 46 meters has only two core components of the motor + reducer combination, only these two components need maintenance and replacement, and the 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 single maintenance of the hydraulic motor and the reducer is good.
4. The cost of spare parts and maintenance is low, because the interchangeability of hydraulic motors and reducers is strong, the amount of social retention is large, and there are many maintenance organizations and professionals.
5. It can be used in different heights of 15-57 meters, and can adapt to the form of telescopic legs and swing legs.
6. Models 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 slipping passability, adaptive 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 walking drive is slightly more complicated.
Advantages and disadvantages of integrated drive axle
Advantages of integrated drive axle:
1. The installation is easy and simple because of the high degree of integration.
2. Simplify part of the control of the travel drive hydraulic system, because the front and rear axle drives are connected through the transmission shaft, and the left and right wheels are transmitted through the internal gears and shaft of the axle.
3. Mechanical differential lock, lock left and right wheels or front and rear axles when tires are 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 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 the axle used in other construction machinery is lower than that of the aerial work platform. To achieve the same safety factor, a large-size axle must be selected, so it appears extra sturdy and the cost is naturally high.
2. The versatility is poor, because the height of the arm truck is from 15 meters to 56 meters, its mass is from 7 tons to 23 tons, and the load-bearing requirements of the axle are from 15 tons to 50 tons. Therefore, different specifications must be used from the cost and economic considerations. Otherwise, the cost is high.
3. Poor maintainability, because of high integration, it needs to be disassembled or hoisted as a whole during maintenance.
4. Spare parts and maintenance costs are high, because the parts are too specific, the market has a small amount of possession, and the versatility and interchangeability are poor. It requires professional personnel of the manufacturer to use proprietary spare parts and tools for maintenance.
5. 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.
One-piece axle has poor maintainability
Split type (win) VS integrated type
Therefore, based on the above, 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.
