10834 results about "Brake" patented technology

An electromechanical linear actuator having a threaded drive, which comprises a threaded nut connected to a cantilever tube and a lead screw connected to a hollow shaft of an electric motor via a rotationally fixed connection in such a way that, by a rotation of the hollow shaft and the lead screw, the threaded nut and the cantilever tube are linearly movable. An axial design length of the electromechanical linear actuator in the maximally retracted state is minimized in that a holding brake for the lead screw and a first rotary bearing for bearing the lead screw on a housing of the linear actuator are arranged within the hollow shaft.

The invention discloses a flange plate body welding device for flange production, and relates to the technical field of welding, the flange plate body welding device comprises a base, a welding arm, a flange plate body and a pipeline, the welding arm is arranged at the top of the base, a clamping device, an auxiliary device and a collecting device are arranged above the base, and the flange plate body is placed between fixing frames; the flange plate body is positioned and clamped through a round rod, a brake block, a rotating sleeve, a fixed sleeve and an auxiliary sleeve, through accurate clamping and positioning, the welding stability can be guaranteed, the problem of clamping shaking is avoided, therefore, the production efficiency is improved, the production effect is guaranteed, flanges with different radiuses can be clamped through the method, and the production efficiency is improved. The operation process is simplified, the working efficiency is improved, rotation of the round rod is limited through the limiting wheel and the clamping rod, namely, the round rod is prevented from rotating reversely, mistaken touch prevention of adjustment of the round rod is achieved in this way, and adjustment errors caused by mistaken touch after adjustment is completed are prevented.

The invention relates to the technical field of drilling equipment, in particular to drilling equipment for automobile brake disc production, which comprises a support, an air cylinder and a mounting table, and an electric control drill bit is arranged on the bottom surface of the mounting table. The second rotating disc slides in a second abutting groove through a second abutting block fixed to the inner side of the second rotating disc when moving downwards along with the first rotating disc, stable rotation of the second rotating disc is guaranteed, the second rotating disc and the first rotating disc rotate coaxially, a second arc-shaped groove is formed in the surface of the second rotating disc, and the second arc-shaped groove is matched with the second arc-shaped groove. The circular block at the bottom of the positioning block close to the center of the connecting disc is inserted into the arc-shaped groove II. When the second rotating disc rotates, the second arc-shaped grooves push the positioning blocks to move along the sliding grooves so as to adapt to the inner diameter size of the brake disc, and therefore multi-point positioning can be conducted on the inner diameter and the outer diameter of the brake disc at the same time, and the clamping stability is improved.

The invention provides an automobile brake caliper manufacturing method based on a selective laser melting additive manufacturing technology, which comprises the following steps: carrying out structural region division on a three-dimensional digital model, and formulating an SLM process parameter strategy of a structural region, the SLM process parameter strategy comprising adjustment of laser power, scanning speed, scanning spacing and powder layer thickness; according to a three-dimensional digital model of the brake calipers and an SLM process parameter strategy, additive powder is laid in a powder bed of SLM equipment, the surface of the powder bed is scanned layer by layer through high-power-density laser beams, powder particles are selectively melted, laser energy density input is controlled, thermophysical characteristics of powder materials are matched, microstructure evolution is controlled, and the brake calipers are manufactured. And after one layer is melted and solidified, the powder bed descends by the height of one layer thickness, a new powder layer is spread out, the process is circulated till additive manufacturing of the brake calipers is completed, and the effects of being light in weight, high in structural strength and good in heat dissipation effect are achieved.

The invention discloses a brake spring piece flatness detection system and method, and relates to the technical field of automobile part processing. The brake spring piece flatness detection system comprises a data acquisition module, a data analysis module, a data screening module, a dynamic monitoring module and a comprehensive judgment module, wherein the data acquisition module is used for acquiring static detection data of N groups of spring pieces randomly extracted from the same batch; the static detection data comprises top view shooting picture data and side view shooting picture data of N groups of spring pieces, which are acquired at equal intervals by utilizing an optical detection instrument, and size data of the spring pieces, which are acquired by utilizing a laser radar, and the technical key points are as follows: through analysis and processing of the static detection data and the dynamic detection data, the overall quality of the spring pieces is shown; related workers can conveniently and quickly know whether the spring pieces meet the requirements of automobile braking or not, high-quality products can be quickly screened out from numerous spring pieces, use is convenient, secondary detection is not needed in the follow-up process, and good application prospects are achieved.

The invention discloses a radial forging machine chuck rotation oscillation braking electro-hydraulic control system and method, and the control system comprises a position detection encoder installed on a hammer head of a forging main machine, a hydraulic servo motion controller, a high-frequency servo valve, an oscillation braking oil cylinder with the same area as an A cavity and a B cavity, and an oscillation braking device with a worm gear and a worm. The pressure sensor and the displacement sensor are integrated on the oil cylinder to form a closed-loop control loop; the control method comprises the following steps: activating an oscillation braking function and collecting hammer phase, oil cylinder pressure and displacement signals in real time; a sine control signal synchronous with the forging frequency is generated based on the brake phase of 270-360 degrees; a brake oil cylinder is driven to push the worm to axially move, and the rotating speed of the chuck is modulated through the helix angle characteristic; and the amplitude is dynamically adjusted through a displacement-pressure feedback signal, and 25MPa overrun protection is executed. The purposes of reducing the brake response delay rate, the forge piece distortion rate and the equipment impact load are achieved, and 90-620 times / min wide-frequency-domain forging is supported.

In particular, the invention relates to an electromechanical brake, a machine, a wear readjustment device and a method or procedure, whereby the electromechanical brake comprises an actuator, a transmission unit, a brake lining and a friction surface, the actuator which is moving in a limited actuator actuation range, the actuator which is executing a lining stroke over at least a portion of its actuator actuation range via the transmission unit, whereby the transmission unit has a non-linearity, i.e. a transference ratio which is not constant over at least part of the actuator operating range, and whereby the transference ratio of the transmission unit is selected and / or configured in such a way that at least two subsections with differently acting non-linearities are formed along the actuator operating range.

The invention discloses automatic brake disc machining equipment in the technical field of brake disc machining, which comprises a lathe, a peripheral clamp arranged on the lathe, a central clamp arranged on the peripheral clamp and a bearing component sleeved on the central clamp, the fixing seat is arranged on the rotating chuck, and the first connecting shaft is inserted in the axis position of the fixing seat. A tool for clamping from outside to inside is combined with a tool for expanding and clamping from inside to outside, so that the device can perform operations of limiting, clamping and fixing inwards from the side surface of the brake disc and expanding and clamping the brake disc outwards from the axis position through the center clamp and the peripheral clamp respectively during turning drilling and turning grinding operation in sequence; and the operation of replacing a tool during turning drilling and turning grinding operation is omitted, the operation steps are simplified, and then the brake disc machining efficiency is improved.

A roll-up control device for a roller shade, comprising a turntable assembly comprising a turntable, a pull spring, an outer turntable, a shaft and a clutch; and a brake assembly comprising a brake shaft cover fastening the shaft rod, a brake spring sleeved on a side of the brake shaft cover, a compression spring expanded and compressed inside the brake shaft cover, a brake sleeve sleeved the side of the brake shaft cover and a shaft housing accommodating a damping ring and clamping the brake sleeve.

The disclosed strap adjustment device may include a pinion gear secured to an adjustment knob, a first rack secured to a first strap and engaged with the pinion gear, a second rack secured to a second strap and engaged with the pinion gear, a braking element disposed adjacent to an inner surface of a drum, a brake engagement element configured to press the at least one braking element toward the inner surface of the drum to maintain a length of the first strap and the second strap by engagement of the braking element against the inner surface of the drum, and a spiral spring configured to allow for an increase in a length of the first strap and the second strap when a tension force is applied to at least one of the first strap or the second strap.

The invention discloses a self-adaptive adjustment method and system for twisting tension of a copper stranded wire. According to a state analysis result, a dynamic coupling adjustment mechanism is started, rapid response adjustment of tension is achieved by adjusting the matching relation between the rotating speed of a stranding cage and the linear speed of a traction wheel and linkage with the exciting current of a magnetic powder brake, tension data are rapidly collected through a sensor, and after filtering and abnormal value processing, the tension is obtained. The fluctuation frequency and amplitude are analyzed immediately, and adjustment is started once the fluctuation frequency and amplitude exceed a set range. During adjustment, the ratio of the rotating speed of the stranding cage to the speed of the traction wheel is adjusted, the current of the magnetic powder brake is linked, mechanical adjustment and electromagnetic braking are matched, and the response speed is much faster than that of traditional single-parameter adjustment. Therefore, the stress of the copper stranded wire in the stranding process is uniform, the wire diameter is not thinned or burrs are not formed on the surface due to sudden change of tension, the stranded wire pitch is uniform, the process requirement is met, and the influence on the stranded wire quality due to sudden change of the tension is avoided as much as possible.

A method comprising: determining whether a state of the vehicle is a non-braking state and a non-accelerating state; in response to determining that a state of the vehicle is a braking state or an accelerating state, generating and transmitting, to the EMB, a calibration stop command; in response to determining that the state of the vehicle is the non-braking state and the non-accelerating state, determining whether it is necessary to calibrate the parameter; in response to (1) determining that it is necessary to calibrate the parameter or (2) receiving a calibration request signal from an EMB controller, generating and transmitting, to the EMB, a calibration start command; and in response to (1) determining that it is not necessary to calibrate the parameter and (2) not receiving the calibration request signal from the EMB controller, generating and transmitting, to the EMB, the calibration stop command.

The invention discloses a data-driven brake disc automatic production line process parameter optimization method and system, and relates to the technical field of production line machining. Firstly, production data of a brake disc automatic production line are collected in real time; then, main components in the production data are analyzed through a main component analysis method and an orthogonal analysis method, so that the scale of the production data is reduced; and then, a full-connection neural network model is utilized to establish a relationship among the production line process parameters, the product quality and the production efficiency. And finally, obtaining an optimal process parameter combination through a particle swarm optimization algorithm, and feeding back the optimal process parameter combination to a control system of the production line by using a data system. Therefore, the problems that in an existing brake disc production line, brake disc machining quality fluctuation is large, technological parameter adjustment lags behind, timeliness is poor, and expert experience is relied on are solved. The invention provides a software-level optimization solution for improving the processing quality and the production efficiency of the automatic brake disc production line.

The present invention relates to an assembled steel sheet pile enclosure structure and a construction apparatus and construction method therefor. A waterproof curtain of the enclosure structure is formed by continuously assembling a plurality of steel sheet piles. Guide-rail-type steel enclosing purlins are detachably connected to the waterproof curtain. Self-adaptive flange devices are detachably connected to the guide-rail-type steel enclosing purlins. A hydraulic device, a moving pile clamping device, a vertical rod, and a fixed pile clamping device of the construction apparatus are sequentially connected from bottom to top and are fixed to one side of a base; a counterweight block is fixed on the other side of the base; and pressure-adjustable tires are arranged at the bottom of the base. The construction method comprises: a pushing rod moving towards a foundation pit; a connecting rod assembly driving a moving gear to extend out of a housing and be engaged with a rack of the corresponding guide-rail-type steel enclosing purlin; driving the moving gear to rotate and drive the corresponding self-adaptive flange device to slide to a steel support mounting position along the rack; the pushing rod moving in the direction facing away from the foundation pit; the connecting rod assembly driving the moving gear to be disengaged from the rack; and a brake synchronously extending out of the housing and being meshed and fixed with the rack.

The invention relates to a rack rail trapped rail vehicle, a driving unit and a swing frame assembly, and belongs to the technical field of rack rail trapped rail vehicles. The swing frame assembly runs on the rack rail and comprises a fixed seat and a swing frame pivoted with the fixed seat through a hinge shaft; two rollers in rolling contact with the top surface of the special-shaped rail on the corresponding side are arranged on one side of the swing frame at intervals, and two brake assemblies are arranged on the other side of the swing frame at intervals; each brake assembly comprises a first brake block, a second brake block and a double-acting oil cylinder, the double-acting oil cylinders drive the two brake blocks to be far away from or close to each other to achieve separation or abutting connection with the peripheral faces of the corresponding idler wheels and the lower surface of the special-shaped rail top plate, and braking and braking releasing are completed. The driving unit comprises a mounting frame and the swing frame assemblies arranged on the two sides of the bottom of the mounting frame. The rack rail clamping vehicle comprises a driving assembly, and the driving unit is installed on a driving frame of the driving assembly. According to the scheme, the swing frame swings in a self-adaptive mode to adapt to track fluctuation, a double-brake structure of the double brake blocks is combined, and the running stability and safety of the rack rail trapped rail vehicle are effectively improved.

The invention provides a magneto-rheological brake integrating a shearing working mode and a shearing valve working mode. The magneto-rheological brake comprises a mounting sleeve set, a braking structure and a driven structure. The driven structure comprises a first driven ring, a second driven ring and a reel, the first driven ring and the second driven ring are both connected with the reel, and a magnet exciting coil is wound on the reel; the brake structure comprises a rotating shaft and a brake disc, the brake disc is arranged on the rotating shaft in a sleeving mode, and the brake disc is connected with the reel through a cylindrical cam structure; axial damping gaps are reserved between the two opposite side walls of the first driven ring and the two opposite side walls of the second driven ring and the two opposite side walls of the installation sleeve set respectively. Radial damping gaps are reserved between the two opposite side walls of the brake disc and the two opposite side walls of the installation sleeve set respectively. According to the invention, on the premise of not changing the structural size, a higher torque volume ratio can be provided, and the application is beneficial for meeting the occasion that the installation space is small and the larger output torque can be provided.

The invention discloses an improvement method of an improved dry quenching coke tank transverse movement traction device, and relates to the technical field of coke tank transverse movement traction. The improvement method of the improved dry quenching coke tank transverse movement traction device comprises the following specific operation steps: carrying out improvement work as follows: transversely moving a coke tank to the lower part of a lifting derrick without a'coke tank stop signal 2 'signal; the position of the ejector pin limiting signal detection piece at the bottom of the coke tank trolley is adjusted and lifted upwards by 2 mm in the vertical direction, and it is guaranteed that the traction hook is evenly stressed. According to the improvement method of the improved dry quenching coke pot transverse movement traction device, a motor single-side brake of an originally designed transverse movement traction device is transformed into a double-side brake working mode, the phenomena of sliding, displacement and the like of the coke pot on a transverse movement traction device track are prevented, the operation safety coefficient is ensured, and the service life of the coke pot is prolonged. A swallow-tail rod with a tilted tail part of an originally designed transverse moving traction device rod is disengaged and transformed into a straight and horizontal pushing mode, so that the coke tank trolley is prevented from sliding due to gravity inertia, and a group of head-tail stopping limiters are added on the existing limiting opposite side.

The utility model relates to the technical field of rail transit fresh air systems, in particular to an air door actuator of a rail transit fresh air system, which comprises a mounting bottom plate, an air door plate, a support frame, a lifting assembly and a driving assembly, the driving assembly is mounted on the support frame and comprises a rotating shaft, a rotor iron core, magnetic steel and a stator, the rotating shaft is a hollow reducing shaft, and the rotor iron core is arranged on the rotating shaft. The rotor core comprises a large-diameter section and a small-diameter section, the rotor core is mounted at the upper part of the large-diameter section, a circle of cylindrical holes are uniformly formed in the bottom surface of the large-diameter section, magnetic steel and a stator are sequentially arranged outside the rotor core, and a brake is mounted at the upper part of the small-diameter section; the lifting assembly is provided with a ball screw and a lead screw nut, the lead screw nut is installed on the ball screw and fixed to the bottom face of the large-diameter section, the upper portion of the ball screw extends into the hollow portion of the rotating shaft, the lower end of the ball screw is connected with a guide plate, and the guide plate is fixed to the middle of the top of the air door plate. The structure is more compact, the design is more reasonable, the requirement for light weight of rail transit is met, and the waterproof and dustproof requirements can be met.

The utility model discloses an intellectualized safety control take-up straining device, including handle subassembly, base subassembly and long braid, handle subassembly includes handle and ratchet wheel, base subassembly includes base, handle and base are pivoted and rotatingly connected through take-up shaft, ratchet wheel is fixed on take-up shaft, and the winding drum is fixed between the ratchet wheel, and the long braid is fixed on the base. The ratchet wheel, the winding drum and the tape winding shaft rotate synchronously, the winding drum is sleeved outside the tape winding shaft and is coaxially arranged, an opening for the long braid to pass through is arranged on one side of the winding drum, one end of the long braid is sleeved on the tape winding shaft and is led out from one end of the base through the opening on the winding drum, one end of the tape winding shaft is connected with the coil spring assembly, and the coil spring assembly comprises a coil spring, a coil spring box and a coil spring box cover. The coil spring box is covered with the coil spring box, a brake assembly is further arranged in the coil spring box, and one end of the tape winding shaft can be provided with a C-shaped opening, an eccentric shaft or a concentric screw hole according to the structure of the brake assembly. According to the utility model, the long braid can be prevented from swinging to hurt an operator, and the personal safety of the operator is guaranteed.

The utility model relates to the technical field of coal mine drilling machines, and discloses a mining drill rod installation device which comprises a rack, a power mechanism and a clamping mechanism are installed on the rack, the power mechanism is used for transmitting rotation and propelling power needed by assembly and disassembly to a drill rod, the clamping mechanism is used for clamping the drill rod, and the power mechanism comprises a main shaft, a brake assembly, a gearbox and a main power source. An output shaft of the main power source is meshed with the gearbox to drive the main shaft to rotate, the gearbox comprises a gear shaft and a multi-stage transmission gear, a transmission shaft connected with the gear shaft is arranged in the brake assembly, the brake assembly can conduct rotation braking on the transmission shaft, a driving drill rod is installed at the end of the main shaft, and a containing hole allowing the driving drill rod to penetrate through is formed in the main shaft. And the end part of the driving drill rod is also detachably connected with a two-way joint. According to the technical scheme, the driving drill rod can be detached conveniently, and meanwhile the service life of the driving drill rod can be prolonged.

The invention relates to the field of vehicle chassis control systems, in particular to an online monitoring device and method for end face runout of a brake disc. Comprising the steps that firstly, the preset wheel speed of a wheel is set, the real-time wheel speed of the wheel is collected, then the real-time wheel speed is compared with the preset wheel speed, and if the real-time wheel speed is larger than the preset wheel speed, the second step is executed; secondly, the real-time clamping force of the friction plate on the brake disc and the instruction clamping force sent by a driver are collected, and the collected real-time clamping force is compared with the instruction clamping force; 3, collecting the times that the real-time clamping force is not equal to the instruction clamping force in unit time, and obtaining the error frequency; 4, the real-time wheel speed is compared with the error frequency, and whether the real-time wheel speed and the error frequency meet the multiple relation or not is judged; and 5, calculating the difference value between the real-time clamping force and the instruction clamping force, setting the difference value as a clamping force error, meanwhile, setting an error threshold value, comparing the clamping force error with the error threshold value, and if the clamping force error is greater than the error threshold value, triggering an alarm.

The invention discloses a motor coil winding device and method, and belongs to the technical field of motor manufacturing, the motor coil winding device comprises a winding machine body, the upper surface of the winding machine body is fixedly connected with a pair of supporting plates, and the outer surfaces of the supporting plates are provided with self-adaptive floating wire protection assemblies; a wire dynamic regulation and control assembly is installed on the upper surface of the winding machine body, a fixing piece is installed on the upper surface of the winding machine body, and a winding displacement quality sensing assembly is installed on the portion, close to the fixing piece, of the upper surface of the winding machine body. The magnetorheological fluid in the magnetorheological fluid damper rapidly changes the rheological property under the action of a real-time control magnetic field, vibration transmission is effectively restrained, the phenomenon that a wire is broken due to too large tension is avoided, when it is monitored that the tension is too small, the magnetic powder brake increases the resisting moment and slows down the rotating speed of the pay-off reel to improve the tension, and if the tension is too large, the magnetic powder brake stops working. The magnetic powder brake reduces the resistance moment and accelerates the pay-off, and ensures that the wire is always at the optimal traction angle.

The invention relates to the technical field of brake disc clamps, in particular to a brake disc clamp for automobile brake disc machining, which comprises a mounting chuck assembly, a lifting adjusting mechanism, a clamping adaptation mechanism, a rotary bearing mechanism and an abutting clamping mechanism, the lifting adjusting mechanism is installed on one side of the installation chuck assembly, the clamping adaptation mechanism is installed at the upper end of the installation chuck assembly, the rotating bearing mechanism is installed at the lower end of the installation chuck assembly, and the abutting clamping mechanism is installed at the lower end of the installation chuck assembly. The clamping adaptation mechanism, the rotating bearing mechanism and the abutting clamping mechanism can be controlled through stretching and retracting of a piston rod of the hydraulic telescopic rod assembly, control operation of operation procedures such as plate body bearing, clamping jaw limiting and abutting clamping is achieved through a single power source, and circulation can be achieved; and moreover, the clamping stability of the brake disc part can be ensured, so that the subsequent machining quality is ensured, and meanwhile, the two sides of the brake disc can be machined.

The invention discloses a full-appearance detection method and system for welding flux of an internal wire of an automobile brake hose joint. The method comprises a multi-angle collaborative imaging step, a geometric defect detection step, a texture defect detection step, a dynamic fusion decision-making step and a fault-tolerant adjustment step. Images are collected through the cameras which are asymmetrically arranged in a surrounding mode and synthesized into a panoramic image, and detection blind areas are eliminated. The welding flux area can be fully covered, the defect detection precision and efficiency are improved, the adaptability to supplied material deviation is enhanced, and the method is suitable for full-appearance quality detection of the automobile brake hose connector internal wire welding flux.

According to a first aspect of the present disclosure, there is provided a dolly featuring at least one wheel, an auto-engaging brake, and a release mechanism for selectively manipulating the auto-engaging brake from an applied state to a released state. The dolly further includes a tow bar which is connected to the release mechanism for operating the auto-engaging brake between the applied and released state.

The utility model discloses a self-locking structure of a rotary table, the rotary table comprises a base and a cradle, the cradle is provided with a horizontal rotating shaft, the base is provided with a horizontal hole part for accommodating the horizontal rotating shaft, the self-locking structure is arranged between the horizontal hole part and the horizontal rotating shaft, the self-locking structure comprises a brake part, a sliding part and a reset part, and the brake part is fixed on the horizontal rotating shaft. The sliding part can move along the axis of the horizontal rotating shaft, the reset part is used for driving the sliding part to abut against the braking part so that the sliding part, the braking part and the horizontal rotating shaft can be static, a separation cavity is formed between the sliding part and the horizontal hole part, the separation cavity communicates with an external air source or liquid source, and when the separation cavity is full, the separation cavity drives the sliding part to be separated from the braking part. According to the self-locking structure of the rotary table, self-locking of the rotary table can be achieved, and a cradle is prevented from falling off due to sudden power failure in the climbing or descending process.

The invention belongs to the technical field of brake discs, and relates to a cast iron brake disc ceramic reinforced iron-based wear-resistant coating and a preparation method thereof.The cast iron brake disc ceramic reinforced iron-based wear-resistant coating comprises a brake disc base body, an iron-based transition coating and a composite wear-resistant coating, the composite wear-resistant coating is formed by mixing iron-based alloy powder, B4C ceramic particles and CeO2 rare earth powder; the preparation method comprises the following steps: 1, carrying out laser cladding on iron-based alloy powder on a brake disc substrate to prepare an iron-based transition coating; 2, carrying out ball milling and mixing according to a weight ratio to prepare composite wear-resistant mixed powder; 3, performing laser cladding on the iron-based transition coating with composite wear-resistant mixed powder; the B4C + CeO2 ceramic particles are mixed into the iron-based alloy powder, so that microcracks of the brake disc coating are reduced, the wear resistance and hardness are improved, dust pollution is reduced, the service life is prolonged, and the friction performance better meets the brake disc strengthening requirement.

The invention relates to an electromechanical drum brake (18) for a motor vehicle. The electromechanical drum brake (18) comprises a drum (10) in which brake shoes (22) are arranged, and an adjusting device (14) arranged between the brake shoes (22) and driven by a drive unit (46), by means of which the brake shoes (22) can be spread apart for braking. The drive unit (46) with the adjusting device (14) is attached to the drum (10) by means of fastening means (50) such that the drive unit (46) with the adjusting device (14) is movable relative to the drum (10) in a drum plane.

Proposed is a brake device for a vehicle seat, in which when a button part is pressed, an unlocking protrusion is inserted between braking members and pushes rollers of the braking members, which are positioned on wedge surfaces, to release surfaces, such that an unlocked state is implemented.

The invention belongs to the technical field of brake disc paint spraying, and particularly relates to brake disc paint spraying equipment which comprises a workbench, a first sliding groove column is slidably connected to one side of the upper end face of the workbench, a sliding block is slidably connected to the inner side of the first sliding groove column, and a paint spraying nozzle is fixedly connected to one side of the sliding block. A positioning mechanism used for fixing the brake disc is arranged on one side of the upper end face of the workbench. By means of the adjustable wrapping mechanism and the traction type unwinding mechanism, after the brake disc is fixed to the upper portion of the positioning disc, the non-braking face of the brake disc faces upwards, the edge of a through hole in the middle of elastic cloth is attached to the edge of the non-braking face of the brake disc by adjusting the size and height of the elastic cloth, and in the paint spraying process, the thickness of the elastic cloth is adjusted. And splashing and flowing paint can be blocked by the elastic cloth, so that the situation that the paint is splashed or flows into a brake surface along with the edge of the brake disc is avoided, and the subsequent use effect of the brake disc is ensured.