31results about How to "High braking precision" patented technology

The invention relates to a braking device for an unmanned vehicle. The device includes a motor, a reducer, an encoder and a sensing mechanism; the reducer is a worm gear reducer, the input end of which is connected to the motor, and the rear output shaft of the motor is connected to the encoder; one end of the output shaft of the reducer is connected to The sensor contact, the other end of which is connected to the torque sensor, and the other end of the torque sensor is connected to the wire wheel wound with steel wire; the two sides of the upper part of the sensor fixing frame connected to the reducer housing are respectively equipped with a zero position sensor and a pole position sensor , the contacts of the two sensors are respectively located inside the circular trajectory of the sensor contacts. The invention adopts the worm gear mechanism to effectively keep the vehicle in the braking state; the limit sensor and the torque limiter realize effective braking and ensure the safety of the vehicle; the steel wire ensures that the unmanned driving mode and the manual driving mode do not affect each other . The utility model has the advantages of simple and compact structure, low cost, strong versatility, and does not destroy the structure of the original vehicle.

The invention provides a spindle structure and a machine tool with the same. The spindle structure comprises a spindle core, a brake disc and a brake assembly, wherein the brake disc is arranged on the spindle core so that the brake disc is driven to rotate by the spindle core, and the brake disc is arranged in a manner of being bulged out of the spindle core; the brake assembly comprises a firstbrake part and a second brake part, the first brake part is movably arranged at one side of the brake disc, and the second brake part is movably arranged at the other side of the brake disc; the brakeassembly has a brake state and an avoiding state, and when the brake assembly is in the brake state, the first brake part and the second brake part are arranged on the brake disc in a clamping manner, so that the spindle core stops rotating; and when the brake assembly is in the avoiding state, the first brake part and the second brake part are arranged in a manner of being spaced from the brakedisc to avoid the brake disc; and the spindle core is provided with a drive section and a connection section which are oppositely arranged, the connection section is used for being connected with an element to be connected, and the brake assembly and the brake disc are arranged on the connection section. The technical problem of low location accuracy of a spindle structure in the prior art duringbrake is solved.

The invention provides a brake force real-time adjusting method based on a brake-by-wire system. The brake force real-time adjusting method comprises following steps: respectively obtaining objective position signal values of motors in various electronic and mechanical brakes of front wheels and / or rear wheels of a brake vehicle according to strokes of electronic brake pedals; respectively acquiring actual position signal values, actual rotation speed signal values and actual current signal values of the motors in real time; and respectively realizing real-time closed-loop control for positions, rotation speeds and current of the motors according to deviation between the objective position signal values and the actual position signal values of the motors, the actual rotation speed signal values and the actual current signal values, and accordingly adjusting actually outputted brake force of the electronic and mechanical brakes with the motors in real time. Correspondingly, the invention provides a brake force real-time adjusting device. The brake force real-time adjusting method and the adjusting device can suppress fluctuation generated when brake force is adjusted in real time in the prior art, stability of the brake-by-wire system is improved, and a braking effect is good.

The present invention provides a self-learning method and system for the pressure difference-current characteristic of a current valve. The self-learning method is applied to the self-learning system, including: obtaining multiple self-learning current points of the pressure difference-current characteristic; Under the set working conditions, apply respective learning current points to the current valves; after a preset time, obtain the motor bus currents corresponding to the respective learning current points; calculate the corresponding first pressure difference according to the motor bus currents ; Obtain the second pressure difference corresponding to the respective learning current points according to the stored pressure difference-current characteristics; calculate the difference between the first pressure difference and the second pressure difference, and according to the difference , to adjust the stored pressure difference-current characteristics. The invention adjusts the pressure difference-current characteristics of the current valve through a self-learning method, thereby reducing the manufacturing process cost of the current valve while improving the braking accuracy of the electronic stability control system.

The invention relates to a high-precision braking mechanism, which includes a brake switch, a brake disc, a switch connection frame, a rotating shaft and a driving device; the driving device is connected to the input end of the rotating shaft, and is characterized in that the brake disc It is installed on the shoulder of the rotating shaft and rotates with the rotating shaft; the brake switch is installed on the switch connecting frame; the brake switch includes an electromagnetic switch, a return spring and an iron core, and the iron core is inserted into the electromagnetic The connection between the electromagnetic switch and the iron core is completed by the return spring; the brake disc includes a fixed base and six disc teeth with the same structure; the six disc teeth are used to fix the base The base is evenly distributed on the side of the cylinder of the fixed base, and the width of each tooth is gradually reduced from the connection end of the fixed base to the end of the tooth; the ends of the teeth are symmetrically arranged with V-shaped grooves on both sides; The fixed base is cylindrical with a bottom end capped.

The invention provides a torque detecting device of a large-torque electric actuating mechanism. The torque detecting device of the large-torque electric actuating mechanism comprises the large-torque electric actuating mechanism, a fixing mechanism, a torque detecting mechanism and a braking mechanism. The large-torque electric actuating mechanism comprises an electric actuating component and an output shaft connected with the electric actuating component. The fixing mechanism comprises a base and a base plate which is located above the base and fixed with the base. The torque detecting mechanism comprises a reactive force torque sensor located below the electric actuating component. One end of the reactive force torque sensor is fixedly connected with the electric actuating component, and the other end of the reactive force torque sensor is fixed with the base plate. The braking mechanism comprises a transmission shaft and a braking component. One end of the transmission shaft is connected with the output shaft, and the other end of the transmission shaft is connected with the braking component. According to the torque detecting device of the large-torque electric actuating mechanism, real-time display of on-line torque curves of the large-torque electric actuating mechanism can be achieved, accurate precision data are provided for analysis, experiments and tests of the large-torque electric actuating mechanism, and the braking is stable and low in noise in the braking detecting process.

The invention discloses a brake apparatus which comprises a rotary drum, a spline shaft, a cam with an internal spline, a cam with an internal circular hole, a coupling, a brake pad and a conical brake disc. The spline shaft is inserted into the rotary drum, the conical brake disc is matched with the brake pad, the rotary drum is connected with a motor by a support, the brake pad is fixedly arranged on the support, a conical surface is arranged at the peripheral edge of the brake pad, the conical brake disc comprises a conical disc and a sleeve, the conical disc runs in with the conical surface, the sleeve is integrally connected with the conical disc, one end of the sleeve is positioned in the rotary drum and is fixedly connected with the cam with the internal circular hole, a tower torsion spring is arranged at the tail end of the spline shaft, and two ends of the tower torsion spring are respectively connected with the spline shaft and the sleeve. The brake apparatus has the advantages that the rotary drum is small in size and low in cost; the brake apparatus is high in brake precision, and the brake stability can be improved; the problem that an existing rotary drum generates heat in no-load states can be effectively solved, and accordingly the mechanical performance of the brake apparatus can be improved.

The invention provides a method and a system for controlling self-adaption gradient braking of a railway vehicle. The method comprises the following steps: estimating the ramp information at the next moment according to a current driving condition of the vehicle; calculating a target braking force according to the estimated ramp information; taking the target braking force as a control feedback volume and controlling the pressure of a braking cylinder. According to the method for controlling self-adaption gradient braking of the railway vehicle provided by theinvention, the braking force of the vehicle can be real-time adjusted according to the condition of line gradient, so that the adaptation of the vehicle to uncertain parameters under the ramp condition in the practical braking process can be increased.

The invention discloses an automatic power cable unwinding device and an operation method thereof. Among them, the power cable automatic unwinding device includes an installation base plate, a door-shaped stand, a door-shaped stand walking mechanism, an intermediate transfer part, a lifting mechanism, a supporting part, a braking mechanism, a sensing part and a control part. The door-type stand is installed on the installation base plate, and is equipped with a door-type stand walking mechanism. Under the action of the door-shaped stand walking mechanism, the door-shaped stand can move left and right, the intermediate transfer part is used to connect with the cable reel to improve the versatility of the device of the present invention, and the lifting mechanism is used to drive the cable reel to lift When reaching a certain height, the braking mechanism cooperates with the sensing parts, etc., which is beneficial to realize unwinding the cable at a uniform speed. Since the present invention does not directly brake the cable reel, it avoids damage to the edge of the cable reel, and at the same time ensures the smoothness of braking. In addition, the braking precision of the device of the present invention is high.

The invention discloses a method for realizing decelerating brake of a rail electric vehicle. The method comprises a step of arranging a pedestal, vehicle inner and outer brake calipers, a motor, a big crankshaft and a link transmission mechanism, and also comprises the following steps: (1) flexibly connecting the motor with a translation mechanism to convert the rotation of the motor into linear motion, pushing the link transmission mechanism through the translation mechanism via a transmission link to relieve and brake wheels of the rail electric vehicle; (2) meanwhile moving the transmission link under pushing of the translation mechanism to realize an effect of increasing thrust to naturally slow down a brake end point, and acting most of impact force stressed on the transmission link on the translation mechanism and a mounting seat thereof when the transmission link is close to or at the brake end point. The invention also discloses an electric vehicle decelerator device and application of the lead screw transmission mechanism. The brake process is stable, inadequate brake caused by kinematic accumulative error can be effectively avoided, the impact and the vibration to the motor are effectively reduced, a motor shaft is protected, and the brake precision is improved.

The invention relates to the technical field of automobile braking, and discloses an intelligent control composite braking device and a braking method thereof, comprising a brake pedal, a push rod is arranged on one side of the brake pedal, and a master cylinder piston is arranged on one side of the push rod One side of the push rod is fixedly connected to the brake master cylinder, one side of the brake master cylinder is fixedly connected to the oil pipe one, and the oil pipe one end is provided with a caliper. , the inside of the caliper is fixedly welded with a mounting plate, one end of the oil pipe is fixedly connected to the oil pipe two, and the two ends of the oil pipe two are respectively provided with a brake auxiliary cylinder, the inner part of the brake auxiliary cylinder is fixedly installed with an auxiliary cylinder piston, and the outer circumference of the auxiliary cylinder piston is fixedly installed with piston groove. The intelligent control composite braking device and its braking method, using electro-hydraulic hybrid braking, have fast braking speed, high braking precision, simple structure and low manufacturing cost, which improves the degree of intelligent control and the braking safety of vehicles. performance.

The invention discloses a rail vehicle air brake parking control method, the steps include acquiring a first preset relationship between speed and friction coefficient under different braking forces; acquiring the current braking force and current speed of the rail vehicle to obtain the current friction coefficient; Correct the current friction coefficient according to the obtained current deceleration to obtain the corrected friction coefficient; compare whether the current deviation between the current deceleration and the preset deceleration is within the preset deviation range, and if so, obtain the current braking force corresponding to the current friction coefficient ; If not, obtain the corrected braking force corresponding to the corrected friction coefficient. Accurately obtain the current friction coefficient based on the current speed and current braking force, and correct the current friction coefficient to obtain the corrected friction coefficient, and select the correct friction coefficient between the current friction coefficient and the corrected friction coefficient according to the current deceleration to make the braking force more accurate value, the braking accuracy is higher. The invention also discloses a rail vehicle air brake parking control system.

The invention discloses a ring type safe plier connecting rod pulling mechanism which is suitable for ring type elevators. The ring type safe plier connecting rod pulling mechanism comprises a speed limiter rope dragging mechanism, a left safe plier pulling mechanism, a right safe plier pulling mechanism, a left linkage mechanism and a right linkage mechanism, the speed limiter rope dragging mechanism, the left safe plier pulling mechanism and the right safe plier pulling mechanism are installed on an arc-shaped bottom plate and an arc-shaped side plate which are mutually connected and arranged on the inner side of a lift car, the left safe plier pulling mechanism and the right safe plier pulling mechanism are distributed on the left and right sides of the speed limiter rope dragging mechanism respectively, the speed limiter rope dragging mechanism is respectively connected with the left safe plier pulling mechanism and the right safe plier pulling mechanism by the aid of the left linkage mechanism and the right linkage mechanism, namely, when the speed limiter is operated, by the aid of the left linkage mechanism and the right linkage mechanism, the speed limiter rope dragging mechanism synchronously drives the left safe plier pulling mechanism and the right safe plier pulling mechanism to perform pulling actions for corresponding safe pliers. The ring type safe plier connecting rod pulling mechanism has the advantages of being simple in structure, high in braking accuracy and good in reliability.

The invention relates to the technical field of precision actuation, in particular to an electronically controlled vector magnetic field device and an installation method thereof. It includes a sample stage on which a sample holder is arranged; a magnetic field control mechanism, the magnetic field control mechanism includes a moving part and a driving part that drives the moving part to perform precise linear motion, and the end of the moving part is loaded with a permanent magnet, The extension lines of the moving direction and the polarization direction of the permanent magnet are perpendicular to the center of the sample holder. The invention controls the precise actuation of the permanent magnet in one direction through the magnetic field control mechanism, and precisely controls the permanent magnet to approach or stay away from the sample on the sample holder, thereby realizing precise control of the magnetic field intensity of the sample. The electronically controlled vector magnetic field device of the invention has the advantages of compact structure, high braking precision and large magnetic field control range.