46results about How to "Guaranteed traction effect" patented technology

The invention discloses a buffering protective device for road safety. The buffering protective device comprises two horizontal transverse plates which are vertically parallel to each other. One vertical end face of each horizontal transverse plate is provided with a hoop, and the other vertical end face of each horizontal transverse plate is provided with a U-shaped connecting piece. Multi-section rods are arranged between the upper horizontal transverse plate and the lower horizontal transverse plate at intervals, and the upper ends and the lower ends of the multi-section rods are fixed through the U-shaped connecting pieces. Each multi-section rod comprises a middle straight rod section and bent rod sections at the upper end and the lower end of the straight rod section, wherein included angles alpha are formed between the straight rod section and the bent rod section at one end and between the straight rod section and the bent rod section at the other end, the straight rod section and the bent rod sections are provided with protection rotation wheels, and the two ends of each protection rotation wheel are positioned through positioning blocks fixed on the multi-section rods. The buffering protective device for road safety is good in buffering effect, and capable of correcting the advancing angles and directions of vehicles and guiding the vehicles to advance in the correct direction, the turning-over rate during vehicle collision is greatly reduced, the device safety is improved, and the safe protection effect is obvious.

The invention discloses a cervical vertebra traction bed, which comprises a bed body, two sets of traction mechanisms located on the bed body, a limiting plate inserted in the center of the bed bottom plate of the bed body and close to one end of the headboard, and electrically connected to the traction mechanism A control device and a remote controller communicatively connected with the control device, the traction mechanism includes a shoulder strap, a first rope, a second rope, a motor, a winding drum and a housing, and the housing is fixed on the tailboard of the bed body On the outside, the motor is located in the casing and the output shaft is connected to the winding drum, the two ends of the shoulder belt are respectively bound with the first rope and the second rope, and the other ends of the first rope and the second rope are respectively Fixed on the winding drum and the footboard, it can avoid traction deviation and the traction effect is good.

The present invention provides a multi-motor total amount cooperative finite time anti-saturation control method, including the following steps: S1, deduce the state equation of the motor according to the theory of consistent total amount and the equation in the rotating coordinate system of the permanent magnet synchronous motor; S2, According to the parameters of the motor state equation in S1, an auxiliary anti-saturation system with finite time convergence is designed; S3, according to the theory that the motor state equation in S1 is consistent with the total amount, the error dynamics equation is constructed, and S4, according to the finite time convergence in S2 Auxiliary anti-saturation system and error dynamics equation in S3, based on non-singular terminal sliding mode design total synergistic finite-time controller, and simplified power integral parameters; S5, based on power integral technology and finite-time Lyapunov stability The theorem completes the stability proof of the aggregate cooperative finite-time controller and obtains the finite-time upper bound. The invention weakens the influence of input saturation on the overall traction performance, and provides convenience for practical engineering utilization.

The invention discloses an anti-slip control method of a transfer case, which belongs to the technical field of anti-slip control. The transfer case anti-slip control method includes the following steps: S10: Calculation of the target speed of the main drive shaft: v m，target =max(v s，target , v min ); S20: Determine the condition of anti-skid control: when v m > v m，target (1+λ 1 ) and v m >v m，target (1+λ 1 ) hold time t≥t 1 , to start the anti-skid control; when the anti-skid control is started: when the transfer case of the vehicle is engaged, the control torque T target = 0 and T target =0 hold time t≥t 2 , the anti-skid control is exited; S30: engagement control torque T of the transfer case target Calculation: T target =k p Δ v，m +k I ∫Δ v，m , k p and k I is obtained by modifying the control parameter factor b of the vehicle in the over-slip state and under-slip state, Δ v，m Speed ​​control deviation of the main drive shaft Δ v，m =v m ‑v m，target , so that after the vehicle starts the anti-skid control, it can follow the T target =k p Δ v，m +k I ∫Δ v，m Calculated T target The value adjusts the engagement control torque of the transfer case. This has the advantage of being able to adjust the engagement control torque of the transfer case while avoiding the effects of slip fluctuations and torque fluctuations.

The invention discloses a steel ball conveyor device belonging to the field of conveying machinery. The steel ball conveyor device comprises a conveying box, a main driving roller, a direction-changing driving roller, a group of carrier rollers, a power transmission mechanism and a steel ball carrying mechanism, wherein a wear-resisting plate is arranged in a conveying cavity of the conveying box; the main driving roller is supported on the wall of the conveying box; chain traction chain sprockets are respectively formed at the two ends of the main driving roller; the direction-changing driving roller is supported on the wall of the conveying box; chain direction-changing traction chain sprockets are respectively formed at the two ends of the direction-changing driving roller; the group of carrier rollers are supported in the middle of the conveying box; the power transmission mechanism is arranged on the top of the conveying box; the steel ball carrying mechanism comprises a pair of curtain rail plate traction chains and a group of curtain rail plates; the direction-changing driving roller is supported on a direction-changing driving roller shaft head support bearing seat; the direction-changing driving roller shaft head support bearing seat is arranged a guide rail; the guide rail is arranged on the wall of the conveying box; the wall of the conveying box is provided with an adjusting screw rod seat which is provided with an adjusting screw rod; and the pair of curtain rail plate traction chains are respectively formed by chain links which are connected in a circulating way. The steel ball conveyor device is beneficial to unloading a steel ball, reliable in transmission and matching, good in firmness and long in service life, can guarantee the traction effect for the curtain rail plates, and is simple and convenient to operate, examine and maintain.