Cross-country forklifts, also called field forklifts, are equipment for loading and unloading materials in poor road conditions such as airports, docks, and stations. It has good mobility and cross-country reliability.
The cross-country forklift is a kind of engineering vehicle that can safely and highly perform loading, unloading, stacking and handling operations on slopes and uneven ground, just like a balance forklift. It can be equipped with forks or replace a variety of attachments to achieve high operating efficiency . Cross-country forklifts have a variety of structural types, and they have developed rapidly abroad.
Structural characteristics of this paragraph
(1) It has good passability and off-road all-wheel drive. There is no differential between the axles, and large-diameter wide-base off-road tires are used. The minimum ground clearance of the vehicle is more than 300mm and the departure angle is more than 30°.
(2) Adopt an articulated frame. The swing angle of the frame is generally ±30°~40°. The steering system is simple and does not require expensive steering drive axles. It can achieve a smaller turning radius, manipulate the steering wheel to swing the frame horizontally, and make the forks easy to align. For materials, for small-tonnage cross-country forklifts, an integral frame can be used, single-axle drive, and drive axle with differential lock.
(3) All-wheel braking. Except for small-tonnage forklifts that use expanding shoe brake structures, most of them are caliper disc brakes, and some heavy-tonnage forklifts also use wet brakes. The parking brake is the most common independent hand brake.
(4) For 2t~3t articulated cross-country forklifts, the front and rear axles are common.
(5) The rear axle of the cross-country forklift is fixed to the frame, and the front axle can swing vertically ±8°~12° relative to the frame. A supporting hydraulic cylinder is arranged between the frame and the front axle. When the forklift is lifting operations, the lifting mast is maintained in a lateral plumb state by manipulating the hydraulic cylinder; when the forklift is driving, the upper and lower chambers of the hydraulic cylinder are allowed to pass through The collusion of the orifices helps to improve the ride comfort of the vehicle.
(6) There is a larger wheelbase and wheelbase. Increase the directional and longitudinal stability of the forklift.
(7) Good mobility. The maximum vehicle speed is generally (30~40)km/h. The power factor is above 0.65, the driving acceleration is good, and it has a climbing ability of 25°~30°.
(8) Larger mast inclination angle. This is necessary for safe operation and driving on uneven ground, generally 10°~15° front and 15° backward.
(9) The setting of the driver's seat. In order to ensure that the operator has a better view during loading operations, the driver's seat is generally placed forward. For articulated forklifts, place them on the front frame as much as possible, and install a roof guard cab with FOPS/ROPS according to different operating requirements.
(10) Walking system. Similar to loaders, there are mechanical transmission (Me), hydraulic shift mechanical transmission (HyC), hydraulic transmission (T/C) and hydrostatic transmission (HYD). The difference is that the full power matching method is used, and the maximum load is the full-load climbing condition.