24 results about "Hydropneumatic suspension" patented technology

The invention discloses an active hydro-pneumatic suspension tractor half-cab dynamic modeling and attitude control method. The method comprises mathematical modeling of a single active hydro-pneumatic suspension, dynamic modeling of an active hydro-pneumatic suspension tractor half-cab and attitude control of the active hydro-pneumatic suspension tractor half-cab. Wherein a single active hydro-pneumatic suspension model comprises a hydro-pneumatic spring two-degree-of-freedom mathematical model and a pressure-flow equation; the active hydro-pneumatic suspension tractor half-vehicle cab attitude control method aims at reducing cab vertical height control errors and pitch angle fluctuation, takes a half-vehicle cab active hydro-pneumatic suspension state-space equation as a basis, and adopts a backstepping design step to construct a control model with a front suspension and a rear suspension decoupling function. According to the invention, high-precision vertical height and pitching attitude control of the driving hydro-pneumatic suspension tractor half-vehicle cab can be realized when coupling force exists in the front suspension and the rear suspension, and the driving comfort is improved.

The utility model belongs to the technical field of vehicle suspension systems, and particularly relates to an active oil gas suspension system which comprises a hydraulic cylinder, a hydraulic two-way pump, a motor and two one-way throttling energy storage branches, the motor is connected with the hydraulic two-way pump, and the hydraulic two-way pump is respectively communicated with a rod cavity and a rodless cavity of the hydraulic cylinder; the two one-way throttling energy storage branches are connected with a rod cavity and a rodless cavity of the hydraulic cylinder respectively, each one-way throttling energy storage branch comprises an energy accumulator and a one-way throttling valve which are connected in series, and each one-way throttling valve comprises a one-way valve and a throttling valve which are connected in parallel; when the hydraulic cylinder is compressed and stretched, the two one-way throttling energy storage branches control fluid to flow in opposite directions. The active hydro-pneumatic suspension system is simple in structure and capable of effectively improving the performance of a vehicle and reducing energy consumption at the same time.

The invention discloses a load sensing device and method for an oil gas suspension cylinder and a control system, and relates to the technical field of vehicles, the load sensing device comprises a VCU device, a vehicle-mounted TOBX device, a cloud control terminal and four pressure transmitters installed on a four-axle double-balance rigid frame, the axles are sequentially numbered as the axle 1, the axle 2, the axle 3 and the axle 4, the four-axle double-balance rigid frame is provided with four oil gas suspension assemblies, and the four oil gas suspension assemblies are connected with the cloud control terminal. The hydro-pneumatic suspension assembly is composed of an energy accumulator and a hydro-pneumatic spring suspension cylinder, the pressure transmitter is installed on the hydro-pneumatic spring suspension cylinder, and the hydro-pneumatic suspension assembly and the pressure transmitter are symmetrically arranged along the left side and the right side of the four-axle double-balance rigid frame. According to the invention, a four-axle double-balanced rigid frame of an existing vehicle is used as a weighing platform, only a pressure transmitter needs to be additionally arranged at a key position, measurement is carried out by using the characteristics of the hydro-pneumatic suspension, large-scale transformation of the vehicle is not needed, and parking or a special wagon balance is not needed; the weight information of the whole vehicle can be obtained in real time in the smooth and stable driving or loading operation process of the vehicle.

The present application belongs to the technical field of suspension system, and particularly relates to a heavy vehicle whole vehicle semi-active damping coordination control method with an oil-gas suspension. The method comprises the following steps: step 1, establishing a mathematical model of adjustable damping force to obtain valve system damping force; step 2, establishing a whole vehicle reference model motion differential equation; step 3, establishing a whole vehicle elastic force and damping force model based on the oil-gas suspension, and the valve system damping force of step 1 is the input of the model; step 4, using the force model, combining step 2, designing a whole vehicle semi-active damping coordination sliding mode control algorithm, coordinating the controllable damping force of each suspension, and realizing that the vertical, roll and pitch states of the whole vehicle body can follow the state changes of the reference model. The present application realizes the coordination control of the vertical, roll and pitch motions of the special vehicle, studies the semi-active control method meeting the use of the special vehicle on the special vehicle with the same side coupled oil-gas suspension, analyzes the semi-active control method, and models and simulates the whole vehicle semi-active damping coordination control strategy.

The invention relates to the technical field of suspension systems, in particular to an oil gas suspension system, a vehicle and a control method. The suspension system comprises a suspension oil cylinder, a main reversing valve, a first suspension valve group and a second suspension valve group; the first end of the main reversing valve is connected with a rodless cavity of the suspension oil cylinder; a port A1 of the first suspension valve group is connected with the second end of the main reversing valve, a port A2 and a port A3 are connected with a rodless cavity and a rod cavity of a suspension oil cylinder respectively, and a port SP is connected with a first energy accumulator. A port P of the second suspension valve group is connected with the hydraulic oil pump, a port T1 and a port T2 are both connected with the hydraulic oil tank, a port A1 and a port B1 are connected with a rodless cavity and a rod cavity of the suspension oil cylinder respectively, a port A2 is connected with the second end of the main reversing valve and connected with a port A1 of the first suspension valve group in parallel, a port B2 is connected with a rod cavity of the suspension oil cylinder, and a port SP is communicated with the port A2 and connected with a second energy accumulator; by controlling the main reversing valve, the first suspension valve group and the second suspension valve group, the suspension can be adaptively adjusted according to the vehicle driving working condition so as to improve the vehicle driving smoothness.

The application discloses a suspension valve group, an oil-gas suspension lifting and leveling system and an all-terrain crane. The suspension valve group comprises a working oil port A, a working oil port B, a return oil port T, an oil inlet port P and an SP port for being connected with an accumulator, and further comprises a suspension lifting control valve, a suspension lowering control valve, a suspension rapid lifting control valve, a suspension slow lifting damping hole, a suspension slow lowering damping hole and a suspension rapid lowering control valve. The suspension lifting control valve and the suspension slow lifting damping hole are connected in series between the P port and the A port of the suspension valve group, and the suspension rapid lifting control valve is connected in parallel with the suspension slow lifting damping hole. The suspension lowering control valve and the suspension slow lowering damping hole are connected in series between the T port and the A port of the suspension valve group, and the suspension rapid lowering control valve is connected in parallel with the suspension slow lowering damping hole. The application considers one-key leveling and control of suspension lifting and lowering speed, so that the vehicle can quickly lift and lower the suspension to adjust the vehicle body height under complex road conditions, and the suspension operation efficiency and the vehicle passing performance are improved.

The application provides a split-acting oil-gas active suspension and a control method. The suspension comprises a suspension controller, a hydraulic actuator, a motor actuator electrically connected with the suspension controller, and a sensor for collecting motion state information of the suspension system, the motor actuator is connected with the hydraulic actuator through a hydraulic oil pipeline; the suspension controller outputs a control signal to control the motor actuator according to a certain control algorithm based on the sensor output signal, the motor actuator drives the hydraulic actuator to act through hydraulic transmission, thereby realizing active control of the suspension system. The application retains the hydraulic actuator of the traditional passive oil-gas suspension, can reduce the cost and difficulty of the active modification of the passive oil-gas suspension. In the driving condition of good road condition, the suspension system is passively controlled by the hydraulic actuator by stopping the control of the servo motor, so as to reduce the power consumption and achieve the purpose of energy saving.

The lower end of an oil cylinder body is fixedly connected with the upper end of a force transmission cylinder, a force transmission plate and a first buffer block are arranged in the force transmission cylinder, the force transmission plate is arranged above the first buffer block, and a distance is reserved between the upper end face of the first buffer block and the lower end face of the force transmission plate; the rod end of the plunger rod downwards passes through the force transmission cylinder, penetrates through the force transmission plate and a central through hole of the first buffer block and then extends out of the lower end face of the force transmission cylinder, the lower end of the plunger rod is fixedly sleeved with a second buffer block, and a distance is reserved between the upper end face of the second buffer block and the lower end face of the force transmission cylinder. The lower end of the plunger rod is fixedly connected with a wheel through a third coupling device and a lower coupling device in sequence; a wheel dynamic vibration absorber is fixedly connected above the third coupling device; when the suspension is far away from the balance position, large rigidity is automatically provided, when the high-frequency vibration reduction requirement of the vehicle body is met, inerter can be provided, and the high-frequency vibration of the vehicle body is effectively restrained by adopting three measures of small-rigidity vibration isolation / anti-resonance / wheel dynamic vibration absorption.

The utility model relates to the structure field of transfer trolley, especially a container transfer trolley oil gas suspension structure. The suspension structure includes drive axle, rim and oil gas damping component, two rims are symmetrically arranged on the left and right sides of drive axle, and two oil gas damping components are symmetrically arranged on one side of drive axle; the oil gas damping component includes oil cylinder, high pressure chamber and low pressure chamber, one end of oil cylinder is rotatably connected with drive axle, the other end of oil cylinder is rotatably connected with the bottom of container transfer trolley, and high pressure chamber and low pressure chamber are all communicated with oil cylinder. The utility model designs oil gas damping component to carry out buffering action and supporting action for suspension, sets up high pressure chamber and low pressure chamber respectively to refine the buffering capacity and realizes accurate regulation, the damping effect is better, increases the suspension height adjusting function while increasing the suspension buffering capacity range, cancels the connecting pipeline between high pressure chamber and oil cylinder, adopts integral transmission, and is more suitable for container scene transfer trolley type in wharf.

The utility model discloses a novel hydro-pneumatic suspension which comprises an outer cylinder, an upper sealing cover and a lower sealing cover, wherein the upper sealing cover and the lower sealing cover are connected to the top and the bottom of the outer cylinder; an air film abutting against the upper sealing cover and the lower sealing cover is further arranged in the outer barrel, and a hydraulic cylinder sleeve connected in the air film in a sleeved mode is arranged between the upper sealing cover and the lower sealing cover. A hydraulic piston is slidably connected into the hydraulic cylinder sleeve, the top of the hydraulic piston is further sleeved with a buffer block, and the lower end of the hydraulic piston is connected with a shock absorber supporting rod extending to the outer end of the lower sealing cover. A plurality of liquid holes are formed in the upper end of the hydraulic cylinder sleeve, a hydraulic oil cavity is formed between the outer wall of the hydraulic cylinder sleeve and the air film, and an air cavity is formed between the air film and the outer barrel. Compared with the prior art, the novel hydro-pneumatic suspension has the advantages that the novel hydro-pneumatic suspension is easy to popularize and use and is used by being combined with hydro-pneumatic control.

The present invention relates to a saddle-type vehicle comprising a frame, a front wheel and a rear wheel, a suspension system (6) coupling the frame to the front and rear wheels in a variable relative position, and an engine; the vehicle comprising a sprung mass portion and an unsprung mass portion comprising at least a portion of the engine; the suspension system (6) being interposed between said mass portions so as to support the sprung portion relative to the unsprung portion. The suspension system (6) comprises a hybrid mechanical hydropneumatic suspension (15) comprising, in turn, an elastic element (7) having a first stiffness (k1), and a hydropneumatic spring (8) having a second stiffness (k2), which are operationally coupled to each other and define an equivalent stiffness (keq) of the hybrid suspension (15) that varies according to the relative position. Figure 2

The invention provides a wide-body dump truck and a control method thereof, relates to the field of mining dump trucks, and adopts the scheme that the wide-body dump truck comprises a frame, a front suspension system and a rear suspension system, the vehicle state sensor assembly comprises a vehicle speed sensor, a load axle load sensor, a suspension stroke sensor and a vehicle body posture and vibration detection sensor; a positioning module; a road section information storage module; and the suspension controller is configured to identify the working condition of a mining area where the vehicle is located and a corresponding road section based on the vehicle speed, the load, the vehicle body posture and vibration, the suspension state and the vehicle position, call corresponding suspension control parameters from the road section information storage module, and adjust the all-hydro-pneumatic suspension system in real time. According to the invention, the driving comfort and the operation safety of the mining wide-body dumper under the condition of cyclic operation on the non-paved road surface in a mining area can be obviously improved.

The invention discloses a composite suspension type crawler chassis and a rescue engineering vehicle. The composite suspension type crawler chassis comprises a frame (10); the loading wheel assemblies are connected with the frame (10) in a swinging mode and comprise a front loading wheel assembly (21f), a rear loading wheel assembly (21r) and at least one middle loading wheel assembly (22), and the at least one middle loading wheel assembly (22) is located between the front loading wheel assembly (21f) and the rear loading wheel assembly (21r); the hydro-pneumatic suspension system (30) is arranged on the frame (10) and is connected with the front loading wheel assembly (21f) and the rear loading wheel assembly (21r); and the torsion bar suspension mechanism (40) is arranged on the frame (10) and is connected with the at least one middle loading wheel assembly (22).

This invention relates to the field of suspension system technology, specifically to a hydropneumatic suspension system, a vehicle, and a control method. The suspension system includes a suspension cylinder, a main directional valve, a first suspension valve assembly, and a second suspension valve assembly. The first end of the main directional valve is connected to the rodless chamber of the suspension cylinder. Port A1 of the first suspension valve assembly is connected to the second end of the main directional valve; ports A2 and A3 are respectively connected to the rodless and rod chambers of the suspension cylinder; port SP is connected to a first accumulator. Port P of the second suspension valve assembly is connected to a hydraulic pump; ports T1 and T2 are both connected to a hydraulic oil tank; ports A1 and B1 are respectively connected to the rodless and rod chambers of the suspension cylinder; port A2 is connected to the second end of the main directional valve and is connected in parallel with port A1 of the first suspension valve assembly; port B2 is connected to the rod chamber of the suspension cylinder; port SP is connected to port A2 and is linked to a second accumulator. By controlling the main directional valve, the first suspension valve assembly, and the second suspension valve assembly, the suspension can be adaptively adjusted according to the vehicle's driving conditions to improve ride comfort.

This invention relates to the field of suspension system technology for engineering vehicles, and discloses a hydropneumatic suspension system and a tracked engineering vehicle, including a front suspension cylinder, a middle suspension cylinder, a rear suspension cylinder, a front swing arm, a middle swing arm, a rear swing arm, a buffer cylinder, a tensioning cylinder, a brake arm, and an eccentric shaft; one end of each of the front, middle, and rear suspension cylinders is hinged to the vehicle frame, and the other end is hinged to the front, middle, and rear swing arms, respectively; a tensioning cylinder cylinder seat is fixedly connected to the rear of the cylinder barrel of the tensioning cylinder, and the cylinder barrel of the buffer cylinder is placed inside the tensioning cylinder cylinder seat, allowing it to swing within the tensioning cylinder cylinder seat; the piston rod end of the buffer cylinder is hinged to the brake arm; the piston rod end of the tensioning cylinder is hinged to the vehicle frame. The beneficial effects of this invention are: it can significantly attenuate the vibration generated during high-speed operation, improve the overall comfort of the vehicle, and ensure that the tracks are tensioned in real time during high-speed operation, preventing slippage and derailment, thus guaranteeing the vehicle's mobility and passability.

The multi-mode adjustable anti-roll oil-gas ISD suspension for the unmanned mine truck comprises two oil-gas springs, and the interior of a hydraulic cavity of each oil-gas spring is divided into a rodless cavity and a rod cavity by a piston; the rod cavity is connected with the first energy accumulator and the second energy accumulator and used for achieving two-stage adjustable rigidity. The second energy accumulator is directly connected with a rod cavity, a first high-speed switch electromagnetic valve and a damping valve are arranged on a pipeline between the first energy accumulator and the rod cavity, and a spiral pipe and a second high-speed switch electromagnetic valve are connected in parallel at two ends of the first high-speed switch electromagnetic valve and the damping valve to switch different damping forces; the first high-speed switch electromagnetic valve and the second high-speed switch electromagnetic valve are in signal connection with an electronic control unit (ECU), switching of working modes of the oil gas ISD suspension is controlled, and a rodless cavity and a rod cavity are connected, so that anti-roll of a vehicle is achieved. The method is suitable for the oil gas suspension system of the unmanned mine truck, the performance of the oil gas suspension is optimized, and the comfort and safety of vehicle driving are effectively improved.

The invention discloses a crane hydro-pneumatic suspension control method, system, device and equipment, and belongs to the technical field of engineering vehicle control, and the method comprises the following steps: executing hydro-pneumatic suspension lifting control and variable damping adjustment control by an arithmetic unit; the hydro-pneumatic suspension lifting control comprises the step of receiving hydro-pneumatic suspension lifting instructions, wherein the hydro-pneumatic suspension lifting instructions comprise a hydro-pneumatic suspension lifting instruction and a hydro-pneumatic suspension descending instruction. The following steps are repeatedly executed until the hydro-pneumatic suspension reaches the target position: based on the hydro-pneumatic suspension ascending instruction, the hydraulic system is controlled to execute throttling increasing / oil supply reducing control when the hydro-pneumatic suspension ascends; and based on the hydro-pneumatic suspension descending instruction, when the hydro-pneumatic suspension descends, the hydraulic system is controlled to execute throttling reduction / oil supply increase control and keep back pressure. The problems that in the prior art, the crane suspension is low in leveling efficiency and poor in precision, and the stability is poor due to the fact that adaptability to different loads and vehicle speed working conditions in the running process is insufficient are solved. The service life of the structure is influenced by non-uniform shaft load distribution of each supporting point; and the operation flexibility is limited.

The utility model discloses a rigidity self-control type two-stage vibration reduction hydro-pneumatic suspension with four inertial elements and a working method. The rod end of a plunger rod in an oil cylinder downwards extends out of the oil cylinder and is fixedly connected with a wheel through a third connecting device and a lower connecting device in sequence; the oil cylinder is sequentially connected with an inerter pipe, an adjustable throttling valve, a damper and a small oil gas chamber through a first oil pipe, and a pipeline between the adjustable throttling valve and the damper is sequentially connected with a rigidity control valve, a normally-open first electromagnetic valve and a large oil gas chamber through a second oil pipe. A second electromagnetic valve and a hydraulic pump station are sequentially connected to a pipeline between the normally open first electromagnetic valve and the large oil gas chamber through a third oil pipe; a valve body of the rigidity control valve is fixedly connected with a vehicle body through a valve body clamping device, and a suspension controller is connected with a height sensor and further connected with an adjustable throttling valve, a normally-open first electromagnetic valve, a normally-closed second electromagnetic valve and a hydraulic pump station. Small rigidity is automatically provided when the suspension is located near the balance position, and large rigidity and large damping are automatically provided when the suspension is away from the balance position.

This application belongs to the technical field of hydraulic suspension stiffness and damping design optimization, specifically involving a hydraulic suspension stiffness and damping full-condition matching design method and system, including the following steps: S1: Establishing the structural parameters of the damping orifice and one-way valve. S The dataset, with 1 as input and flow coefficient as output, simultaneously establishes the cylinder. 、 Piston rod structural parameters S 2. Initial inflation pressure p For input, elastic force F 2( x, p, S 2) The output dataset; S2: Establish the structural parameters through the neural network. S 1. Speed v With damping force F 1( v, S 1) Mapping; Initial inflation pressure p Structural parameters S 2. Location x With elastic force F 2( x, p, S 2) Mapping; S3. Optimization using a hybrid genetic algorithm based on the LM algorithm; S4: Outputting the optimal parameters; The advantage is that, through the coordinated optimization of the damping orifice, one-way valve, cylinder, piston rod structure, and initial charging pressure, the precise design and efficient structural matching of the stiffness and damping of the oil-gas spring are achieved.

The application provides an oil-gas suspension device and a vehicle, and relates to the technical field of vehicles. The vehicle comprises the oil-gas suspension device, the oil-gas suspension device comprises a power assembly, a vehicle frame and a damping assembly, the inside of the vehicle frame is provided with a mounting area capable of mounting at least part of the power assembly, the damping assembly comprises a tank body and a valve body, and the valve body is arranged in the mounting area. The tank body is provided with a sliding rod, the sliding rod can move relative to the tank body under the action of external force, so as to approach or move away from the mounting area in a first direction. The tank body can generate a damping force to attenuate the vibration or impact feedback of the vehicle frame in the first direction. The valve body is used for controlling the movement of the sliding rod in the first direction. The tank body and the valve body are arranged in a staggered manner in a horizontal direction and at least partially coincide in a vertical direction, so as to make full use of the operation space of the vehicle frame in each direction. The tank body and the valve body are arranged separately, so that the structure of the tank body and the valve body is simplified, and the tank body and the valve body are convenient to process and form.

This invention relates to the field of automotive suspension technology, and particularly to a lifting cylinder for an air-hydraulic suspension system. It includes a three-stage nested piston mechanism, an active venting and fluid replenishment mechanism, an adaptive adjustment mechanism, and a self-sealing mechanism. In this invention, the combination of the three-stage nested piston mechanism and a high-precision displacement sensor enables high-precision control of the lifting height to ±0.2mm, thus meeting the high-precision control requirements of precision operations. The active venting and fluid replenishment system can promptly remove gas from the cylinder and replenish fluid, avoiding sluggish action caused by gas mixing and insufficient fluid, improving work efficiency by more than 40%. The adaptive adjustment mechanism can automatically adjust the cylinder's operating parameters according to the vehicle's real-time operating conditions, enhancing the cylinder's adaptability under complex conditions, reducing the occurrence of malfunctions, and improving the cylinder's reliability.

The application discloses a vehicle damping control system and method based on a magneto-rheological oil gas spring, which comprises a magneto-rheological oil gas suspension unit, a collection unit and a control unit. The magneto-rheological oil gas suspension unit comprises a magneto-rheological oil gas spring and a PINCH mode magneto-rheological valve. The magneto-rheological oil gas spring is used for hydraulic interconnection in the oil gas suspension, and the PINCH mode magneto-rheological valve is used for switching the form of the hydraulic interconnection. The collection unit is used for collecting the motion posture information of the vehicle. The control unit is used for adjusting the interconnection form of the oil gas suspension according to the motion posture information of the vehicle, and controlling the motion posture of the vehicle, so that the running state of the vehicle reaches a target state. The application can obtain better roll stiffness and pitch stiffness, and improves the overall damping performance and steering stability of the heavy load vehicle.

The utility model provides a front hydro-pneumatic suspension structure, which belongs to the technical field of suspensions of off-highway mining dump trucks, and adopts the technical scheme that the front hydro-pneumatic suspension structure comprises two front hydro-pneumatic springs, the two front hydro-pneumatic springs are respectively arranged on two sides of a frame, and the tops of the front hydro-pneumatic springs are hinged with the frame through hydro-pneumatic spring supports; the bottoms of the front oil-gas springs are hinged to the front axle, the tops of the oil-gas spring supports are higher than the upper surface of the frame, racks are fixed to the tops of the two oil-gas spring supports, and a rack cross beam is connected between the two racks; the bottoms of the oil-gas spring supports are lower than the lower surface of the frame, and an oil-gas spring lower cross beam is connected between the bottoms of the two oil-gas spring supports. The utility model has the beneficial effects that the overall structural strength and the torsional strength of the frame are obviously improved, and the stress concentration is avoided, so that the overall structure has stronger load impact resistance and is more durable.