35results about How to "Brake release" patented technology

The invention discloses an automobile brake controlled by a wire, which comprises a brake disc, wherein a friction plate is arranged on each of the two sides of the brake disc; the friction plates are fixedly connected with a piston which can axially move along a brake caliper body and is connected with a trapezoid nut; the trapezoid nut can axially move along an inner hole of the piston and is in fit connection with a trapezoid threaded end of a screw rod; a driving nut is movably arranged on a ball screw section of the screw rod and is fixedly connected with a worm gear; the worm gear is engaged with a worm which is fixedly connected with an output end of a driving motor of the brake to covert the rotation motion of the driving motor of the brake into linear motion; and the driving motor of the brake is perpendicular to a brake caliper of the brake. The automobile brake controlled by the wire has automatic regulation and parking braking functions, can improve reinforcement effect, is high in braking performance, simple in structure, convenient to mount, easy to maintain and less in energy consumption, and can ensure the constancy of brake response speed of a vehicle so as to further ensure the braking performance.

The invention relates to a permanent-magnetic retarder. The structure of the retarder comprises a stator, a rotor and a control mechanism. The rotor consists of a plurality of permanent magnets and a magnet retainer, and can be rotationally arranged in the stator. The control mechanism is positioned inside the rotor and used for operating and controlling the braking state. The permanent-magnetic retarder is arranged between an automobile clutch and a gear box, and the braking effect of the retarder on an automobile is enhanced through the speed reducing function (namely torque amplification) of the gear box; the stator of the permanent-magnetic retarder is arranged on the outer side of the rotor, and a rotating part is arranged inside the rotor, so the permanent-magnetic retarder is safer compared with the prior permanent-magnetic retarder or the current vortex retarder; the stator of the permanent-magnetic retarder is provided with a liquid cooling device so that the heat dissipation effect is good, and the brake torque does not decline when the permanent-magnetic retarder works for a long time; the control mechanism of the permanent-magnetic retarder adopts the prior frictional plate type, so the shift of the braking state can be easily realized, and no magnetic leakage torque is generated in the non-braking period; and the permanent-magnetic retarder has the advantages of compact integral structure and small volume and mass.

The invention discloses an intelligent driving safety protection device, a protection method and an intelligent driving vehicle. The intelligent driving safety protection device comprises a host device and a signal emission device, wherein the host device comprises a microprocessor, a mode signal input unit, a braking intervention signal input unit, a steering intervention signal input unit, an emergency stop signal input signal, a wireless receiving unit, and a prompting unit; the mode signal input unit, the braking intervention signal input unit, the steering intervention signal input unit,the emergency stop signal input signal and the wireless receiving unit are connected to the input end of the microprocessor; the prompting unit is connected to the output end of the microprocessor; the signal emission device comprises a wireless emission unit and a key input unit which are electrically connected; the wireless receiving unit is used for receiving a signal emitted by the wireless emission unit; the microprocessor is connected to an automobile CAN (Controller Area Network) bus through a CAN communication unit and sending a driving safety protection control instruction to the prompting unit and / or the automobile CAN bus according to the signal of the input end. The intelligent driving safety protection device monitors an intervention or emergency stop signal in an automatic driving mode and deploys and controls corresponding alarm prompt and control measures to ensure the driving safety in the development and testing process of intelligent driving vehicles.

The invention discloses a fan motor brake device for providing brake protection before a fan motor starts, which comprises a conversion circuit, a brake enabling circuit, a brake release circuit and a fan motor start circuit, wherein the conversion circuit is provided with multiple power switch elements and electrically connected with the fan motor; the brake enabling circuit is connected with the conversion circuit; the brake release circuit is connected with the brake enabling circuit; and the fan motor start circuit receives an outer DC voltage. When the brake enabling circuit receives the outer DC voltage, the brake enabling circuit generates a brake control signal to conduct the power switch elements so as to brake the fan motor.

The invention provides a caster with a braking device. The caster comprises the following components: a caster body, an annular engaging step formed at a side of a wheel, and a plurality of axle-pin rakes with a hollow vibrated shaft which are rotatably arranged on the caster body; an operating unit, which is provided with a rotary knob for braking rotation of a plurality of axle-pin rakes and releasing the braking operation by manual operation, and an operation part for making a plurality of transmission wires reciprocate at an axial direction according to braking operation and braking releasing operation of the rotary knob; a plurality of transmission wires; a braking unit, which brakes the wheel by engaging the annular engaging step to the axle-pin rakes according to reciprocation of the axial direction of the transmission wires, and releases the braking of the wheel by releasing engagement of the annular engaging step to the axle-pin rakes.The caster can be used for braking operation and releasing operation by using a manual operation easily, the caster can be installed on trolleys of various shapes and other objects to be installed with university.

The invention discloses a brake which belongs to a brake on an aluminum extrusion production line and particularly belongs to a brake adopting high pressure oil or compressed air as brake power for braking and a disk spring for returning, in order to solve the problem of inaccurate stop position of a tractor. The brake at least comprises a cylinder (1), a piston (2), a support plate (5), a support (6), a locking block (8) and a brake pad (9). When the brake is in work, hydraulic oil or compressed air enters the cylinder (1) through a hole (10) of the cylinder (1) and pushes the piston (2) to drive the brake pad (9) onto a braking surface, thereby implementing rapid braking. According to the brake, the tractor can rapidly, accurately and safely stop at a position required by a process; and the brake is high in automatic degree, reliable in braking, and convenient to operate.

The invention discloses a vertical servo hydraulic tool rest, which comprises a base, cylindrical vertical shafts, a drive system, inner gear rings, tool stages and a braking and loosening component, wherein the inner sides of the lower ends of the tool stages are fixedly with a movable fluted disc respectively, while upper ends are fixedly connected with the inner gear rings; fixed fluted discs are arranged on the upper end face of the base between the movable fluted discs and the vertical shafts; meshing teeth are arranged on the upper end faces of the movable fluted discs and the fixed fluted discs; the inner gear rings and the tool stages are driven by the drive system to rotate; the drive system comprises a speed reducer, a servo motor, a drive gear and a transmission gear; the speed reducer and the servo motor are connected with each other and are arranged below a bearing block; the drive gear is arranged above the bearing block, and is connected with an output shaft of the speed reducer; and the transmission gear is arranged on the bearing block, is externally meshed with the drive gear and is internally meshed with the inner gear rings. The vertical servo hydraulic tool rest has the characteristics of small moment of inertia, stable rotation, large output torque and relatively larger braking torque.

The invention relates to a hub-type electromagnetic liquid cooling retarder which comprises a hub (4), an accelerating device, an oil liquid sealing device, a stator (13) and an excitation coil (14), wherein the hub (4) is connected with the rear axle (1) of an automobile; the accelerating device is connected with the hub (4); the oil liquid sealing device is connected with the accelerating device; the stator (13) is fixed on the rear axle (1) through a bolt; an internal groove is formed in the stator (13); the excitation coil (14) is coiled in the internal groove of the stator (13). The hub-type electromagnetic liquid cooling retarder has the advantages that an automobile brake drum is reformed into a gear ring serving as a part of an accelerating mechanism; the structure is simple; the braking torque and the braking power of the retarder can be improved; a rotor is light, so that the rotary inertia is low; the stator is directly fixed on the rear axle, so that the coiling of the excitation coil is simple.

The invention belongs to the technical field of building engineering, and particularly relates to a hoisting structure of a resin plate applied to a shopping mall atrium aiming at the problems that the appearance aesthetics of the resin plate is undoubtedly affected due to existing drilling installation of the resin plate, so that cracks are prone to occurring on the surface of the resin plate, and meanwhile, the height of an existing hoisting structure of the resin plate is inconvenient to adjust and the existing hoisting structure of the resin plate cannot be adjusted to a suitable height according to the decoration style of each house. According to the following scheme, the hoisting structure of the resin plate applied to the shopping mall atrium comprises the resin plate and a mountingplate fixedly connected to the wall top by flanges, wherein two symmetrically arranged brake rods are slidably installed at the bottom of the mounting plate, an adjusting plate is arranged between the mounting plate and the resin plate, and a sliding hole is formed in the middle position of the adjusting plate. According to the hoisting structure of the resin plate applied to the shopping mall atrium, the installation and replacement of the resin plate by people can be greatly facilitated; meanwhile, no hole needs to be punched on the resin plate during installation, so that the aesthetics ofthe resin plate cannot be affected; and the resin plate can be adjusted to a suitable height according to the decoration style of each house.

The invention relates to an electrical park brake used for a motor vehicle and a parking braking control method of the electrical park brake. The electrical park brake comprises a lock-up mechanism and a decelerating mechanism, wherein the lock-up mechanism comprises a rocker arm, a slider, a guide rail, a first locking actuator and a second locking actuator, the first locking actuator is providedwith a first lock-up pin, and the second locking actuator is provided with a second lock-up pin; the front end of the rocker arm is connected to the decelerating mechanism, the tail end of the rockerarm is connected with the slider, the slider can slide front and back in the guide rail under the action of the rocker arm, and the guide rail is provided with a first locking actuator and a second locking actuator. After the slider moves to a corresponding gear position in the guide rail, the first lock-up pin or the second lock-up pin can move so as to stop the slider from moving back. By meansof the electrical park brake, the space of a cab can be increased, more convenience is brought to parking, and parking is easier.

The invention belongs to the technical field of unmanned aerial vehicles and in particular relates to a portable multitask rotor individual combat unmanned aerial vehicle. For problems that a propeller of an existing individual combat unmanned aerial vehicle is very easily to collide with a flying bird in the rotating process in the flying process of the existing individual combat unmanned aerialvehicle to affect the flying safety of the rotor individual combat unmanned aerial vehicle and outriggers of the existing individual combat unmanned aerial vehicle cannot buffer during landing, the following scheme is provided; the portable multitask rotor individual combat unmanned aerial vehicle comprises an unmanned aerial vehicle body and a radar; the radar is fixedly mounted on the unmanned aerial vehicle body; a receiving module is electrically connected to the radar; a single chip microcomputer is electrically connected to the receiving module; and an attacking module is electrically connected with the single chip microcomputer. According to the portable multitask rotor individual combat unmanned aerial vehicle, the unmanned aerial vehicle body can perform investigation and attacking on surrounding environments; and meanwhile, in the rotating process of the propeller, a protective net can prevent the propeller from colliding with the flying bird so that the flying safety of theunmanned aerial vehicle body is enhanced; and during landing, the outriggers can prevent the unmanned aerial vehicle body from suffering larger collision with the ground to be damaged during landing.

The invention provides an electric control device and a valve, relating to the technical field of valves. The electric control device comprises a motor and a braking mechanism, wherein the braking mechanism comprises a driven component and a braking component, the driven component is in contact fit with the braking component so as to realize the brake of the motor; the motor comprises a driving component, and the driving component is connected with the driven component and is used for driving the driven component to be separated from the braking component so as to release the braking of the motor. According to the electric control device and the valve, the braking and self-locking functions can be realized, and the phenomena that a gate valve is rebounded during the closing and cannot be tightly closed are avoided.

The invention relates to an electrically-controlled braking device which comprises a fixed plate. A first through hole is formed in the middle of the front side of the fixed plate, and a rotating shaft of a motor is arranged in the first through hole through a bearing. The front side of the motor is fixedly connected with the rear side of the fixed plate, and a first bevel gear is fixedly arrangedat the front end of the rotating shaft of the motor. The front side of the fixed plate is fixedly connected with the rear side of a horizontal pipe, and the horizontal pipe is collinear with the center line of the first bevel gear. A plurality of second through holes are uniformly formed in the periphery of the horizontal pipe, and first stand pipes are fixedly arranged in the second through holes correspondingly. Bar-type sliding grooves being axially symmetric are correspondingly formed in the inner walls of the first stand pipes, and sliding blocks are movably arranged in the bar-type sliding grooves correspondingly and can slide correspondingly along the corresponding bar-type sliding groove. The electrically-controlled braking device is simple in structure and adopts electro-hydraulic braking, thereby retaining the stability of hydraulic braking, and also adding the sensitivity of electrical braking.

The invention discloses a fan motor brake device to provide brake protection before a fan motor starts, including a conversion circuit, a brake enable circuit, a brake release circuit and a fan motor start circuit. The conversion circuit has a plurality of power switch elements and is electrically connected to the fan motor. The brake enable circuit is connected to the conversion circuit; the brake release circuit is connected to the brake enable circuit. The fan motor starting circuit receives an external DC voltage. When the braking enabling circuit receives the external DC voltage, the braking enabling circuit generates a braking control signal and turns on the power switching elements to brake the fan motor.

The invention relates to a hub-type electromagnetic liquid cooling retarder, which comprises a hub (4), a speed increasing device, an oil sealing device, a stator (13) and an excitation coil (14). The hub (4) and the rear of the automobile The bridge shaft (1) is connected, the speed increasing device is connected with the hub (4), the oil sealing device is connected with the speed increasing device, and the stator (13) is fixed on the On the rear axle shaft (1), the stator (13) is provided with an inner slot, and the excitation coil (14) is wound in the inner slot of the stator (13). The invention transforms the automobile brake drum into a ring gear used to form a speed-increasing mechanism. The structure is simple, and it is beneficial to improve the braking torque and braking power of the retarder; the rotor is light in weight and small in moment of inertia; the stator is directly fixed on the rear On the bridge shaft, the winding of the excitation coil is simple.

The invention relates to the technical field of road construction, in particular to an automatic roadbed tamping device for road construction, which comprises a mounting seat and a power device on the mounting seat, a crank disc is arranged at the output end of the power device, a connecting rod is arranged on the outer side surface of the crank disc, and a tamping hammer is arranged at the lower end part of the connecting rod; a supporting assembly is arranged on the right side of the mounting base, an angle adjusting assembly is arranged between the supporting assembly and the mounting base, the angle adjusting assembly can adjust the inclination angle of the mounting base, and the tamping hammer can drive the mounting base and the supporting assembly to jump in the inclination direction of the mounting base when jumping up; the whole structure is simple, operation is convenient, the tamping degree can be automatically adjusted according to the softness degree of the road surface during use, meanwhile, the automation degree of tamping operation is further improved, and the labor intensity of workers is reduced; and the device is very suitable for automatic road construction.

The invention discloses a press machine, and specifically relates to a punch pin drive device for a press machine. The punch pin drive device comprises a punch pin, a crank, a planetary speed reducer and a servo motor, wherein the crank is in transmission connection with the planetary speed reducer, the planetary speed reducer is connected with the output shaft of the servo motor, and a brake is arranged on the output shaft of the servo motor; and the brake comprises a stator, an armature, a rotor, a friction sheet and a flange, the rotor is connected and linked with the output shaft of the servo motor through a spline shaft sleeve, a coil and a spring are arranged in a stator body, the spring is coaxial with the output shaft of the servo motor, one end of the spring is jacked into the stator, the other end of the spring is jacked onto the armature, and a flat key is arranged on the outer ring of the armature and limits the armature to only axially move along the output shaft of the servo motor. The punch pin drive device disclosed by the invention is simple and reasonable in structural design; the planetary speed reducer is used in a replacement manner, so that the height of a product is lowered, and simple structure is achieved; and the servo motor is adopted, so that a power can be automatically adjusted according to output, and energy saving is realized.

The invention discloses a vertical servo hydraulic tool rest, which comprises a base, cylindrical vertical shafts, a drive system, inner gear rings, tool stages and a braking and loosening component, wherein the inner sides of the lower ends of the tool stages are fixedly with a movable fluted disc respectively, while upper ends are fixedly connected with the inner gear rings; fixed fluted discs are arranged on the upper end face of the base between the movable fluted discs and the vertical shafts; meshing teeth are arranged on the upper end faces of the movable fluted discs and the fixed fluted discs; the inner gear rings and the tool stages are driven by the drive system to rotate; the drive system comprises a speed reducer, a servo motor, a drive gear and a transmission gear; the speedreducer and the servo motor are connected with each other and are arranged below a bearing block; the drive gear is arranged above the bearing block, and is connected with an output shaft of the speed reducer; and the transmission gear is arranged on the bearing block, is externally meshed with the drive gear and is internally meshed with the inner gear rings. The vertical servo hydraulic tool rest has the characteristics of small moment of inertia, stable rotation, large output torque and relatively larger braking torque.

The invention relates to a permanent magnet liquid cooling retarder for a vehicle, belonging to an auxiliary brake system for a vehicle. The retarder comprises a shell as well as stators (5) and rotors arranged in the shell. The rotors are evenly distributed on a magnet holder (3) by a plurality of tile-shaped permanent magnets (4) along the circumference; the stators (5) are sleeved on the peripheries of the rotors; and a gap is left between the inside diameter of each stator (5) and the outside diameter of each permanent magnet (4). The automobile permanent magnet liquid cooling retarder for a vehicle is characterized in that the stators (5) can slide axially relative to the rotors and are drawn by one or two external-force devices so that the stators (5) and the rotors can be completely staggered from complete overlapping; each of the rotors is connected with an automobile transmission shaft; and each of the stators (5) is further internally provided with a cooling waterway connected with a water tank of an automobile circulation radiator. The invention ensures that a brake torque of the permanent magnet retarder is continuously adjusted as the stator slide axially in the shell, and the invention is safer compared with the traditional eddy current or permanent magnet retarder.

The invention discloses an automobile brake controlled by a wire, which comprises a brake disc, wherein a friction plate is arranged on each of the two sides of the brake disc; the friction plates are fixedly connected with a piston which can axially move along a brake caliper body and is connected with a trapezoid nut; the trapezoid nut can axially move along an inner hole of the piston and is in fit connection with a trapezoid threaded end of a screw rod; a driving nut is movably arranged on a ball screw section of the screw rod and is fixedly connected with a worm gear; the worm gear is engaged with a worm which is fixedly connected with an output end of a driving motor of the brake to covert the rotation motion of the driving motor of the brake into linear motion; and the driving motor of the brake is perpendicular to a brake caliper of the brake. The automobile brake controlled by the wire has automatic regulation and parking braking functions, can improve reinforcement effect, is high in braking performance, simple in structure, convenient to mount, easy to maintain and less in energy consumption, and can ensure the constancy of brake response speed of a vehicle so as to further ensure the braking performance.

The invention belongs to the technical field of electronic information engineering. The invention especially relates to a console for demonstrating an electronic information automatic operation device. An existing electronic information automatic operation device is generally fixed to a designated position, in order to solve the problems of inconvenience in movement, no storage device and inconvenience in storage in the prior art, the following scheme is provided: the console comprises a moving seat, an operating table is fixedly mounted at the top of the moving seat, a driving assembly is arranged at the top of the operating table, a box cover is fixedly mounted on the driving assembly, and the box cover completely covers the top of the operating table; and when the electronic informationautomatic operation device is not used, the electronic information automatic operation device can be stored in the operating table, so that the electronic information automatic operation device can be protected, and when the electronic information automatic operation device needs to be used, the box cover is opened, braking on the fixing plate is relieved, and under the elastic force of the compression spring, the electronic information automatic operation device can be moved out of the operating table to be normally used.

The invention relates to an eddy current slow-speed vehicle with an anti-pushing function. According to the vehicle, a linking pile is arranged in the center of the rear part of the tractor, a linkingbeam is arranged at the front part of the trailer, the center of the linking beam is hinged to the linking pile, an eddy current retarder is arranged on a transmission shaft of the tractor, and a signaling plate is arranged on the axis of the linking beam; a pair of dangerous angle travel switches are arranged on the swing track of the signaling plate, the two dangerous angle travel switches arearranged on the tractor and are symmetrically distributed by taking the axis of the tractor as a center, so that when the vehicle speed is higher than the safety speed and the axis of the linking beamdeviates from the axis of the tractor and reaches the dangerous turning angle beta, the dangerous angle travel switches are triggered by the signaling plate to enable the eddy current retarder to befailed; and a pair of warning angle travel switches are arranged on the swing track of the signaling board, so that when the vehicle speed is higher than the safety speed and turning reaches the warning turning angle alpha, the warning angle travel switches are triggered to enable the eddy current retarder to operate at a low gear. The vehicle can play a role of the retarder and can ensure safetyduring turning.

The invention provides an unwinding machine, an insulated wire production device and an unwinding method, and relates to the technical field of insulated wire production. The unwinding machine comprises an unwinding mechanism, a braking mechanism and a conveying and guiding mechanism; the conveying and guiding mechanism is in transmission connection with the braking mechanism; wires on the unwinding mechanism is conveyed to the conveying and guiding mechanism and is conveyed out through the conveying and guiding mechanism; and the conveying and guiding mechanism is configured to drive the braking mechanism in a wire-off state so as to brake the unwinding mechanism. According to the unwinding machine, the unwinding mechanism can be automatically braked in the wire-off state, and wire accumulating and winding caused by continuous unwinding of the unwinding machine in the abnormal state are avoided.

The invention belongs to the technical field of electric machinery and particularly relates to a concentric winding type automatic conversion device for a winding mold for non-cross winding machine. The concentric winding type automatic conversion device is characterized in that a transposition rotating shaft is mounted on a transposition bracket, and two ends of the transposition rotating shaft are respectively hinged with an upper rotating shaft block and a lower rotating shaft block which are mounted on the winding bracket; and the rear end of an transposition air cylinder is hinged with anair cylinder rotating shaft fixedly connected to the winding bracket, and a piston rod of the transposition air cylinder is hinged with a pin shaft block fixedly connected to the transposition bracket. A left winding mold and a right winding mold which are mounted on the transposition bracket and are distributed in an included angle manner can be driven by the transposition air cylinder to move back and forth along the horizontal direction by taking the transposition rotating shaft as a center. When the piston rod of the transposition air cylinder stretches out, the center of a right windingmold is coincided with the center of the winding bracket, and when the piston of the transposition air cylinder shrinks back, the center of the right winding mold is coincided with the center of the winding bracket, so that the effects of high-speed winding and precise winding displacement can be achieved.

The invention belongs to the technical field of wringing machines, and particularly relates to a wringing machine with a flow guide mechanism. Aiming at the problems that an existing wringing machineis complex in manufacturing structure and high in production cost, and meanwhile, the wringing machine is not provided with a flow guide mechanism for water flow, so that extruded water is scattered on the ground, the scheme is proposed as follows. The wringing machine comprises a fixing frame, wherein two symmetrically-arranged supporting plates are fixedly installed at the top of the fixing frame, the same top plate is fixedly installed at the tops of the two supporting plates, a flow guide pipe is fixedly installed at the top of the fixing frame, a lower roller is fixedly installed at the top of the fixing frame, and the lower roller is located in the flow guide pipe. The wringing machine is simple in structure, one end of leather is fixed to the outer side of a storage roller, then theheight of an upper roller is adjusted so that the leather can be wrung, squeezed water can flow into a water containing tank through the flow guide pipe, therefore the squeezed water cannot be scattered on the ground, and great convenience is brought to workers to take care of the leather.

The invention discloses a brake and accelerator pedal assembly. The problem that an existing brake accelerator pedal adopts independent design, the fact that the pedaled pedal is an accelerator or a brake needs to be judged during braking, and the situation that the accelerator is pedaled mistakenly occurs often in the emergency situation is solved. The assembly has only one set of pedal mechanism, the pedal mechanism is hung on the front of a cab or an independent bracket through a hinge and is composed of a pedal connecting rod, a pedal, a switch, an accelerator limiting block, a brake limiting block, a corresponding electronic accelerator sensor circuit, a accelerator limiting block control circuit, an accelerator ejector rod return spring and a brake ejector rod return spring. The accelerator limiting block is higher than a cab floor when the accelerator limiting block control circuit is switched on, an accelerator limiting action is achieved, the accelerator limiting block is lower than the cab floor when the accelerator limiting block control circuit is broken, and the limiting action is not achieved. After a heel lands to the ground and pedals on the switch, the pedal is the accelerator pedal, and after the heel is off the ground and the switch is bounced, the pedal is the brake pedal.

The invention discloses an automatic moxa stick rolling machine for cleaning moxa sticks and a use method of the automatic moxa stick rolling machine. The automatic moxa stick rolling machine comprises a support, the support comprises a cross beam, and a controller, a winding roller, a first clamping assembly, a reciprocating sliding seat, a paper pulling assembly, a material ramming mechanism, an arc-shaped bottom plate, a gluing mechanism, a moxa stick box, a second clamping assembly, an uncoiling roller assembly, a paper conveying roller and a paper rolling frame are sequentially arranged on the upper portion of the cross beam from front to back. The winding roller comprises a reel, the reel is fixed to the upper portion of the cross beam through a web plate and passes through a first driving motor, the first clamping assembly comprises a base and a clamping plate in pressing fit with the base, a rectangular opening is formed in the lower portion of the moxa stick box, a first rotating roller is arranged in the rectangular opening, a second rotating roller is arranged below the first rotating roller, and a conveying groove is formed in the rear portion of the first rotating roller; and one end of the conveying groove extends outwards from an opening of a web plate on one side of the moxa stick box, a second clamping assembly is arranged on the lower portion of the moxa stick box, an uncoiling roller assembly is arranged on the rear portion of the second clamping assembly, the purpose of automatically replacing and clamping old rolled cloth is achieved, and the productivity of equipment is improved.

The invention discloses a brake which belongs to a brake on an aluminum extrusion production line and particularly belongs to a brake adopting high pressure oil or compressed air as brake power for braking and a disk spring for returning, in order to solve the problem of inaccurate stop position of a tractor. The brake at least comprises a cylinder (1), a piston (2), a support plate (5), a support (6), a locking block (8) and a brake pad (9). When the brake is in work, hydraulic oil or compressed air enters the cylinder (1) through a hole (10) of the cylinder (1) and pushes the piston (2) to drive the brake pad (9) onto a braking surface, thereby implementing rapid braking. According to the brake, the tractor can rapidly, accurately and safely stop at a position required by a process; and the brake is high in automatic degree, reliable in braking, and convenient to operate.