36results about How to "Increase the wheelbase" patented technology

An all-terrain vehicle (ATV) includes a frame and a pair of front and rear wheels suspended from the frame. A straddle-type seat has a main portion and a secondary portion to accommodate a driver and a passenger. The wheelbase of the ATV is increased in length (compared to conventional ATVs) so as to increase stability and comfort for the driver, and / or to accommodate a passenger behind the driver. The passenger and secondary seat portion are disposed in front of the rear wheel axis and moved closer to the center of the wheelbase. Moreover, the combined center or gravity of the ATV, rider, and passenger is moved closer to the center of the wheelbase to improve stability, comfort and / or safety. The driver and passenger each have sufficient space to actively position themselves without significantly interfering with each other.

A vehicle includes an electric motor disposed downward of a battery. The vehicle is provided with a motor control unit configured to receive electrical power from the battery and to supply the electrical power of the battery to the electric motor, and a case that accommodates the motor control unit. The case is positioned downward of the battery and forward of the electric motor, and is arranged in a posture in which the length in the front-rear direction of an accommodating portion in the case is less than the vertical height thereof in a side view of the vehicle body. Accordingly, a compact longitudinal layout of the electric motor and the motor control unit that controls the electric motor is achieved.

The invention discloses a bridge dynamic weighing method based on the long-gauge fiber grating sensing technology and a bridge dynamic weighing system thereof. The dynamic weighing method comprises the steps that long-gauge sensors are arranged: the long-gauge sensors are arranged on the initial entering and final exiting side span units of a vehicle and the part between the two side span units along the length direction of the bridge; load condition monitoring of a vehicle to be identified and load condition monitoring of a standard vehicle are performed: the vehicle of which various parameters are known acts as the standard vehicle, the strain response data of each sensing unit under the load condition of the standard vehicle are acquired, and the maximum strain of each sensing unit only caused by the axle load is calculated; and vehicle load identification under the load condition of the vehicle to be identified is performed. The maximum bending strain value only caused by the axle load under the load condition of the standard vehicle is analyzed and compared with the corresponding value under the load condition of the standard value so that the total weight of the driving load on the bridge and the load of each vehicle can be identified, the overload vehicle can be effectively pre-warned and thus damage to the big long-span bridges can be avoided.

The invention provides a high-ground-clearance multifunctional plant protection machine. The high-ground-clearance multifunctional plant protection machine comprises a frame, a supporting leg which is mounted on the frame along the inclined direction of 45 degrees, and a walking system connected with the supporting leg, wherein the supporting leg comprises a double-parallelogram mechanism connected with the frame, a supporting box body hinged to the end part of the double-parallelogram mechanism, and a supporting stand column connected with the supporting box body; the supporting stand column is connected with the walking system; the double-parallelogram mechanism is driven by a hydraulic oil cylinder; when the oil cylinder is retracted, a connection end of the supporting box body of the double-parallelogram mechanism moves upwards; the whole supporting leg is retracted towards the frame along the inclined direction of 45 degrees; meanwhile, the wheel distance of the machine is reduced and the shaft distance is reduced; when the oil cylinder stretches, the connection end of the supporting box body of the double-parallelogram mechanism moves downwards; and when a rod part of the mechanism is prone to be a horizontal state, the oil cylinder stretches to the maximum position; and meanwhile, the wheel distance of the machine and the shaft distance are in a maximum-value state. The high-ground-clearance multifunctional plant protection machine has the advantages of compact structure, complete functions, stable working, wide applicable range, strong cruising ability, convenience in operation and high working efficiency.

The invention discloses an all-terrain shock-absorbing suspension compound crawler robot mobile platform, which comprises a disk frame and crawler belt traveling mechanisms fixed on both sides of the disk frame. The load-bearing wheels on the robot mobile platform are floatingly installed on the disk frame through the Christie suspension frame, which can well reduce the impact of the uneven road surface on the robot body, and has good cushioning and shock absorption performance. The sprockets at both ends of the track not only play the role of driving and positioning, but also the sprockets at both ends are suspended on the frame through two first suspension arms arranged in a figure-eight shape, and the upper end of the first suspension arm and the frame can rotate Connected, the lower end is elastically suspended on the upper frame through the first elastic body, and after assembly, the first elastic body is in a stretched state, and this structure also makes the two sprockets play the role of tightening the track. The wheelbase between the two sprockets can automatically adjust the front and rear wheelbases according to the terrain and the platform load. Through real-time adjustment, the track has tension and does not come off, ensuring that the robot can work effectively and stably.

The invention discloses a lane deviation active correction method based on torque control. The process is: when the active deviation correction system meets the activation conditions, it enters the activation state, and the active deviation correction system obtains road information and vehicle parameter information in real time; calculates the feedforward torque based on the information obtained above; determines the target yaw rate for vehicle deviation correction based on the information obtained above , calculate the feedback torque according to the target yaw rate; calculate the compensation torque according to the feed-forward torque, feedback torque and steering wheel torque, and input the compensation torque to the steering system to complete the torque correction control. The present invention adopts the control scheme of feedforward and feedback, can quickly follow the target parameters, and complete the vehicle lane deviation correction action, the system is stable, and the calculation amount is low, and the memory consumption of the controller is low; by using the vehicle yaw angular velocity as the target control value , which ensures good deviation correction effect when driving in curves.

The invention provides a variable-axisbase unmanned aerial vehicle mechanism with a fire extinguishing launch device, including a transmission assembly, an arm assembly, a launch assembly, and a wing assembly; the arm assembly includes a crank rod, an upper joint, a carbon tube, and a connecting rod , lower joint, Y-shaped connecting rod, and round nut. The curved rod, upper joint, carbon tube, connecting rod, lower joint, and Y-shaped connecting rod form a parallelogram, and the height of the parallelogram is changed under the drive of external force to drive The wings always swing up and down parallel to the horizontal plane.

The invention discloses a multi-wheel movable platform with a variable axle distance. The multi-wheel movable platform comprises a frame, at least three pairs of wheel type walking mechanisms are mounted on the frame, each wheel type walking mechanism comprises a main pin and wheels, the main pins are mounted on the inner sides of the wheels, and each pair of wheel type walking mechanisms is symmetrically arranged on the two sides of the frame. Active suspensions are mounted between the wheel type walking mechanisms and the frame, and the wheel type walking mechanisms are connected with the frame through the active suspensions. An intermediate axle moving assembly for driving the axle distance to change is further mounted on the frame, and connected with the two active suspensions locatedin the middle of the movable platform. The multi-wheel movable platform has the advantages that the structure is simple, the axle distance can be adjusted according to the road surface condition, andthen the overall mobile ability of a car is improved.