32results about How to "Maximum speed reduction" patented technology

A drive apparatus (1) for a motor vehicle has a hollow portal axle (2) that accommodates two electrical machines (4). Wheels (12) are mounted rotatably at opposite ends of the portal axle (2) and can be driven by the electrical machine (4) associated with the respective wheel. A step-down gear mechanism (8, 9) is arranged between each electrical machine (4) and the respective wheel (12) and a separate connection from the respective wheel to the step-down gear mechanism, permits the wheel to be mounted in a non-rigid manner. The respective step-down gear mechanism (8, 9) is connected to the respective wheel (12) by a cardan shaft (10).

Operation of an industrial vehicle, such as one that lifts and transports loads, is controlled based on the weight of a removable battery. A control method involves reading a battery weight value from an electronic memory attached to a battery. That battery weight value is compared to a specified battery weight value for the industrial vehicle. The operation of the industrial vehicle is restricted to less than the normal operating characteristics when the battery weight value is less than the specified battery weight value. For example, the height to which a load can be raised is limited or the speed at which the industrial vehicle is limited when a battery installed on the industrial vehicle weighs less than the specified battery weight for effectively counterbalancing a load.

The invention discloses a sleeve type dip pipe for an RH (Ruhrstahl Hereaeus) vacuum refining device. The dip pipe mainly comprises an annular sleeve pipe, a circular-pipe-shaped partition wall, a cross beam and a flange plate, wherein the circular-pipe-shaped partition wall is coaxially arranged in the middle of the annular sleeve pipe; an inner circular pipe is formed on the inner side of the circular-pipe-shaped partition wall; an outer annular pipe is formed between the outer wall of the circular-pipe-shaped partition wall and the inner wall of the annular sleeve pipe on the outer side of the circular-pipe-shaped partition wall; the inner annular pipe and the outer annular pipe can be used as an ascending pipe and a descending pipe of the RH dip pipe respectively. As the space in the bottom of a vacuum chamber is fully utilized by the dip pipe with the structure to enlarge the circulation area of molten steel of the dip pipe, the circulation flow of an RH vacuum circulation degassing device can be remarkably increased.

A method for controlling an elevator installed in a building that includes an elevator car arranged to travel in a hoistway between floor landings that are at different heights, one or more ropings connected to the elevator car, a hoisting machine for moving the elevator car, and a control for control the hoisting machine is provided. In the method, the sway data of the building is determined, which data describes the strength of the sway of the building, and the starting position data of the elevator car is determined, which starting position data contains data about the starting position of the elevator car and / or data about how long the elevator car has been in the starting position, and the settings for the run speed of the next run are determined on the basis of the starting position data and the sway data. An elevator is configured to perform the method.

Operation of an industrial vehicle, such as one that lifts and transports loads, is controlled based on the weight of a removable battery. A control method involves reading a battery weight value from an electronic memory attached to a battery. That battery weight value is compared to a specified battery weight value for the industrial vehicle. The operation of the industrial vehicle is restricted to less than the normal operating characteristics when the battery weight value is less than the specified battery weight value. For example, the height to which a load can be raised is limited or the speed at which the industrial vehicle is limited when a battery installed on the industrial vehicle weighs less than the specified battery weight for effectively counterbalancing a load.

The invention relates to a method for forecasting the damage of components of a motor vehicle, comprising the following steps: Providing a damage model for at least one component; detecting the loading of the component; determining the loading and damaging of the component along a damage distance and / or over a damage period; determining a reference distance and / or reference period on the basis ofthe determined loading of and / or damage to the component; comparing the damage distance and / or the damage period with the reference distance or reference period; determining an acceleration factor from the damage distance and reference distance or damage period and reference period.

Reach truck 1 with a control system 2 for controlling the lowering movement of a fork 10, the control system 2 comprising a height sensor 20, for determining the lifting height h of the fork 10 of the reach truck 1, a proportional electrical hydraulic valve 50 connected to a lifting cylinder 70 of the reach truck 1, for controlling an oil flow of the lifting cylinder 70, and a control unit 30, connected to the height sensor 20 for receiving the actual lifting height h signal and controlling the proportional electrical hydraulic valve 50, wherein the control unit 30 automatically decreases the maximum lowering speed v of the fork 10, by controlling the proportional electrical hydraulic valve 50, according a predetermined maximum speed v curve depending on the lifting height h of the fork 10, and in some embodiments only on the lifting height h of the fork 10, such that the fork 10 is softly stopped at the ground.

The present invention provides a cam curve design method based on the k-order harmonic function, and belongs to the technical field of cam design, in order to solve the problem that the mechanism is fluctuate and cannot be applicable to the high speed occasion due to that some characteristic parameter curves among the existing harmonic cam curves are close to infinity at the end point. The methodcomprises: obtaining key point data determined by the cam for realizing the function; making the key point data to be dimensionless to obtain the dimensionless time T and the dimensionless displacement S; writing a cam curve fitting program to obtain a first cam curve expression based on the k-order harmonic function, and adding the first cam curve expression to a local control point; and after the solution, transforming the first cam curve expression to obtain a second cam curve expression, combining the first two expressions to obtain a final cam curve expression, determining the order of k,adding the final cam curve expression to the local control point, and obtaining an optimized cam curve. The method provided by the present invention is used in the design of cam curves.

The invention discloses a heat sink with a needle rib-recessed composite array structure. The heat sink comprises a cooling channel, a plurality of needle ribs, a plurality of recesses, a substrate and a top plate, wherein the substrate and the top plate are provided with opposite inner wall surfaces respectively; the cooling channel is defined between the two inner wall surfaces; the inner wall surface of the substrate is provided with a plurality of needle ribs to form needle rib arrays; the needle rib arrays are arranged in a staggered mode; on either the substrate or the top plate, at least the inner wall surface of the substrate is provided with a plurality of recesses to form recess arrays; in the cooling channel, a minimum flowing cross section is formed between the needle ribs in a transverse direction, a recess is formed on at least one minimum flowing cross section, and the plurality of recesses are arranged in a staggered mode in a longitudinal direction to form the recess arrays; and the needle rib arrays and the recess arrays form the needle rib-recessed composite array structure. The invention also discloses a method for arranging the heat sink. Compared with the conventional needle rib array heat sink, the heat sink has higher heat transfer performance and the same or even lower flow resistance; therefore, the heat sink has higher comprehensive thermal performance.

The invention relates to an improved sine acceleration cam locking mechanism. The improved sine acceleration cam locking mechanism is mainly composed of a servo motor, a supporting plate, a transmission shaft, a cam, an incomplete bevel gear, a cross-shaped guide rail, a guide rail fulcrum bar, a groove bevel gear, a connecting face and the like, wherein the servo motor serves as a source power device of the locking mechanism to be connected with the transmission shaft, and the cam and the incomplete bevel gear are coaxially installed to provide power for connection and disconnection between connection faces; the cam makes contact with the surface of the cross-shaped guide rail, and by means of rotation of the cam, the cross-shaped guide rail is driven to forwards move according to a sineacceleration motion law; the guide rail fulcrum bar is installed in a cross-shaped guide rail sliding groove and is connected with a sliding block to form a guide rail assembly, and the guide rail assembly can do rectilinear motion; the groove bevel gear with a sinusoid groove is installed on the supporting plate, the guide rail fulcrum bar is tangent to the sinusoid groove all the time, and the rotation of the groove bevel gear can drive the guide rail assembly to move in the radial direction; and the connecting face is connected with the supporting plate through the cam to form a connectingface structure locked to an external connecting unit.

The invention provides a ball-borne unmanned aerial vehicle system launching section guidance law design method based on dynamic pressure compensation. The method comprises the steps that a standard dynamic pressure generator generates standard dynamic pressure values at different altitudes on line and outputs the standard dynamic pressure values to a standard dynamic pressure comparator; the standard dynamic pressure comparator calculates the ratio of the dynamic pressure at the current moment to the standard dynamic pressure as the input of the dynamic pressure compensator; the dynamic pressure compensator processes the input value according to a preset rule and then inputs the input value to the guidance instruction generator as a feedforward item, and the guidance instruction generatorsuperposes the input values of the dynamic pressure compensator to generate a guidance instruction and outputs the guidance instruction to the attitude controller. According to the ball-borne unmanned aerial vehicle system launching section guidance law design method based on dynamic pressure compensation, the dynamic pressure value is introduced into guidance instruction feedback to reduce the overload and the maximum speed value of the aircraft in the throwing and pulling process so that the safety of the aircraft in the level flight stage after ball-borne throwing is guaranteed, the dynamic pressure value is measurable, the guidance law curve is continuous, and the actual engineering application is facilitated.

The invention relates to the technical field of engineering construction, and discloses a suspension platform for high-rise building outer wall construction. The suspension platform comprises a driving bin, wherein adjusting bins are fixedly mounted on the two sides of the driving bin, adjusting plates are lifted through a telescopic machine, so that the meshing contact positions of long conical teeth and short conical teeth are changed, the transmission ratio is changed, the larger the width of the suspension platform is, the initial transmission ratio can be adjusted through the telescopic machine so that it can be guaranteed that the device can be parallel to the ground all the time for the suspension platforms with different widths in the whole operation process, the distance between a limiting disc and a limiting pipe can be reduced while the telescopic machine is adjusted, according to the device, the time interval from overspeed to jamming is shortened, so that the maximum speed which can be reached after overspeed is reduced, the problem that the safety performance of the device is reduced after the width and the mass of the suspension platform are increased is solved, and the practicability and the safety performance of the device for different suspension platforms are improved.

The invention discloses an algorithm for a deformation quantic-polynomial type cam operation curve, aiming to limit operation parameters during swinging of a swing arm of a cam. The cam constructed by the algorithm does quantic-polynomial motion in the initial phase of the curve during swinging, then does constant-speed motion in the current speed when reaching the highest speed, and decelerates according to the quintic polynomial until stopping motion when moving to a preset point at the constant speed. By the algorithm, the maximum speed of the swing arm of the cam can be reduced, and centrifugal force of a cam mechanism can be reduced.

The invention discloses a sine wave waveform combined compensation method for an arresting impact test, which is characterized by comprising the steps of 1, adding a half-sine wave in front of an original arresting impact waveform to perform speed compensation so as to enable the acceleration amplitude and the table top displacement to be the minimum; 2, adding a complete sine wave in front of thecompensated waveform to perform displacement compensation so as to enable the speed and the acceleration of the table top of the vibration table to be both 0; and 3, carrying out a test according tothe combined waveform after two times of compensation. According to the invention, an arresting impact test can be carried out on part of vibration tables whose speed and displacement do not meet testconditions.

The invention provides a bag-type dust collector, which includes a box body, a pattern plate is arranged in the box body, and the box body is divided into an upper clean air chamber and a lower box body, the lower box body is provided with a plurality of ash hoppers, and the lower box body is provided with an air inlet The bell mouth, the flower plate is provided with several filter bags, the air inlet bell mouth and the lower box are provided with a deflector, the deflector includes a front deflector and a rear deflector, and the front deflector has a cross section of It is composed of semicircular guide grooves, the rear guide plate is composed of semicircular guide grooves with straight plates tangent to it on both sides, and the guide grooves of the front guide plate and the rear guide plate are divided into two parts. The openings are all facing the direction of the air inlet bell mouth, and both ends of the deflector are bent along the direction of the flue gas and have transition arcs. By changing the structure and installation arrangement of the deflector, the flue gas can enter Before the dust chamber, the large particles are subjected to inertial sedimentation, and it has stronger rigidity and greatly reduces the amount of deformation. It can also better realize the secondary distribution of the flue gas, and avoid the phenomenon of bag breaking due to excessive concentration of the flue gas. .

The invention relates to an electric wheelchair rollover protection device containing an acceleration sensor and a method. The rollover protection device comprises the acceleration sensor, an inclination angle monitoring module, a seat, a supporting platform, a horizontal frame, a motor system and a wheel group; by detecting the acceleration sensor, the angles in the left and right rolling direction and the front-and-back trimming direction are obtained through calculation, a parallel robot is designed and used for improving the degree of freedom of a mobile platform, and therefore on the condition that a fixed platform is inclined, the wheelchair can improve the inclination situation of the mobile platform through posture adjustment of the parallel robot. A motor driving control unit is set to start a processing program, on the condition that inclination of the fixed platform reaches a first threshold value or a second threshold value, the electric wheelchair can automatically slow down and move slowly, and the maximum speed and the maximum acceleration are decreased; on the condition that the inclination of the fixed platform reaches a third threshold value or a fourth threshold value, the electric wheelchair starts an emergence program and stops going forwards, the parallel robot is started to work to compensate the inclination degree, rollover caused by too much inclination is prevented, the inclination sense of a user sitting on the seat is reduced, the user experience is improved, and the user security is guaranteed.

The invention relates to a method for setting the operating point of a hydraulic actuating installation, wherein a source of volumetric flow is connected to a hydraulic cylinder (4) via a pressure line (10) filled with hydraulic fluid, wherein the volume of the hydraulic fluid is passed through the volume The flow source (15) is adjusted, and the operating point corresponds to the positioning of the execution facility (1) under the predetermined parameters of the device (5) to be operated by the execution facility (1), wherein, from the volume flow source motor (11) And / or the rotational position of the volume flow source ( 15 ) leads to the volume of hydraulic fluid required for setting the operating point. In a method in which a reliable start of the volume determination can be achieved, the volume determination is started at a predetermined pressure (p_K) by means of an angle of rotation adjustment, wherein the predetermined pressure (p_K) is lower than the system pressure (p_L).

Vehicular pursuit intervention systems and methods are provided herein. An example method includes determining unauthorized use of an emergency vehicle, causing the emergency vehicle to perform a controlled stop, locking access points of the emergency vehicle, closing windows of the emergency vehicle, and locking a weapon within the emergency vehicle.

The invention provides a driving speed regulation device of a sightseeing electric vehicle. The driving speed regulation device of the sightseeing electric vehicle comprises a chassis and a speed regulating structure; the speed regulating structure is arranged on the chassis, and the speed regulating structure comprises a control box, a driving motor, an accelerator pedal assembly, a sliding rod and an electric telescopic rod. By arranging the electric telescopic rod, the horizontal position of a check block can be adjusted, the check block can block a sliding block at different positions, then the maximum stepping angle of the pedal is controlled, the maximum speed of the sightseeing electric vehicle is increased by adjusting the shell rightwards, and the maximum speed of the sightseeingelectric vehicle is reduced by leftwards adjusting the shell leftwards. For a beginner driver, the sightseeing electric vehicle can run at a constant speed only by adjusting the required speed in advance and then treading the accelerator pedal assembly to the maximum angle, the driver does not need to excessively adjust the state of a pedal in the running process of the vehicle, and operation is quite easy and convenient.

The invention relates to a method for adjusting an operating point of a hydraulic actuator arrangement, in which a volumetric flow source is connected to a hydraulic cylinder (4) via a pressure line (10) which is filled with a hydraulic fluid, wherein a volume of the hydraulic fluid is regulated via the volumetric flow source (15) and the operating point corresponds to a position of the actuator arrangement (1) for a predefined parameter of a device (5) which is to be actuated by the actuator arrangement (1), wherein the volume of the hydraulic fluid which is required to adjust the operating point is derived from a rotational position of a volumetric flow source motor (11) and / or the volumetric flow source (15). In a method which facilitates a reliable start of the volume determination, avolume determination is started by means of a rotary angle regulation at a predefined pressure (p_K), wherein the predefined pressure (p_K) is lower than a system pressure (p_L).

The invention relates to a method for operating an ethernet on-board network (2) of a motor vehicle (1), in which the following steps are carried out: determining a run time or delay (9) of a first signal (10) on a first connection path (6) between a first control unit (3) of the ethernet onboard network (2) and a second control unit (7) of the ethernet onboard network (2); determining a maximum speed (11) of the first connection path (6); and determining a type of transmission medium (12) of the first connection path (6) based on the connection delay and maximum speed (11).

Real-time location systems and beacons are used to facilitate operating a materials-handling vehicle in compliance with rules of the road. Materials-handling vehicles may include a processor operably coupled to at least one vehicle system and a receiver communicatively coupled with the processor and configured to receive signals from a real-time location system and from one or more beacons that are located at known positions in an environment in which the vehicle operates. The vehicle is programmed to receive a signal from the real-time location system in response to entering a zone in the environment, communicate with a beacon associated with the zone, determine a position of the vehicle in the zone, and to perform at least one of modifying an operating characteristic of the vehicle system and operating the vehicle system based on the determined position of the vehicle and a rule of the road.

The present invention relates to the technical field of cams, in particular to a design method of a cam profile, comprising the following steps: (1) determining the motion law of the heald frame, establishing a general curve motion law equation, and selecting the characteristic factor T 1 =T 2 =0.1,T 3 =T 4 =0.5, T 5 =T 6 =0.9, get the corresponding parameter C i , B i 、A 1 and A 2 ; (2) Establish the function expression of the cam push and return section; (3) Draw the cam profile through Adams modeling. The present invention adopts the general curve movement law of the correction coefficient to reduce the maximum speed and maximum acceleration of the cam, and the speed, acceleration and jerk curves are smooth and continuous, have good kinematics characteristics, and achieve ideal design effects. The opening machine of textile machinery is a medium-high-speed medium-load mechanism, and the characteristic value V of the cam curve should be selected in the cam design. m 、A m and (AV) m Smaller curves to improve stress conditions are calculated when T 1 =T 2 =0.1,T 3 =T 4 =0.5, T 5 =T 6 =0.9, V m 、A m and (AV) m Obtaining the optimal value improves the scientific accuracy of cam design, reduces errors, and avoids the problems of low precision and poor dynamic characteristics of related products.