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.

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 invention relates to a cam curve design method based on a k-order harmonic function, which belongs to the technical field of cam design. The invention aims to solve the problem that the existing harmonic cam curve is unsuitable for high-speed occasions due to mechanism fluctuations caused by some characteristic parameter curves approaching infinity at the endpoints. It includes: obtaining the key point data determined by the cam to realize the function; dimensionless the key point data to obtain the dimensionless time T and dimensionless displacement S; writing the cam curve fitting program to obtain the k-order harmonic function Add local control points to the first cam curve expression; after solving, deform to obtain the second cam curve expression, then combine the first two expressions to obtain the final cam curve expression, determine the order of k, and add local control points, An optimized cam profile is obtained. The invention is used in the design of cam curves.

The invention discloses a dip pipe for an RH vacuum refining device. The dip pipe comprises an ascension pipe and a descending pipe and is divided into the arc-shaped ascension pipe and the arc-shaped descending pipe by a middle partition wall, wherein a lifting gas blowing-in guide pipe is arranged at the lower part of the ascension pipe, a lifting gas outlet is formed in the lifting gas blowing-in guide pipe, and the dip pipe formed by the ascension pipe and the descending pipe is fixed at the lower end of a vacuum chamber through a flange welded on the dip pipe. As the dip pipe with the structure fully utilizes the space of the bottom of the vacuum chamber, a gap between the ascension pipe and the descending pipe of a conventional dip pipe, which is generated due to a refractory material, is omitted, the flow area of dip pipe molten steel is enlarged, and therefore, the circular flow of a vacuum circulating gas stripping unit RH can be obviously increased.

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).

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 method involves providing a damage module (7) for an engine component, and detecting contamination of the component. Wear and damage of the component is detected along with damage length and / or over damage duration. Reference length and / or reference duration is determined based on detected damage length and / or damage duration of the component. The damage length and / or the damage duration are compared with the reference length and / or the reference duration. An acceleration parameter is determined from the damage and reference lengths and / or damage and reference durations.

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.

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.