30results about "Track brakes" patented technology

The invention discloses a retarder assembly stable in operation, and relates to the field of retarders, the retarder assembly comprises a shell assembly and a sliding oil cylinder assembly, the sliding oil cylinder assembly is arranged on the inner side of the shell assembly, and the sliding oil cylinder assembly comprises an oil cylinder, a piston rod assembly, a sealing cover assembly, a supporting ring, a return stroke valve plate, a shaft check ring and a punching stopping assembly. A piston rod assembly is arranged on the inner side of the oil cylinder, a sealing cover assembly is arranged on the inner side of the top end of the oil cylinder, a supporting ring is arranged on the oil cylinder and located on the upper side of the sealing cover assembly, a return stroke valve plate is arranged between the supporting ring and the sealing cover assembly, and a shaft check ring is arranged on the oil cylinder and located on the lower side of the return stroke valve plate. The pressure valve adopts the combined design of a double-stiffness spring of a pressure valve spring set and a speed valve plate, resistance work can be dynamically adapted according to the vehicle weight and the working condition, and the vehicle coupling in-place rate in the low-temperature environment in winter is increased.

The utility model discloses a traveling crane distillation area protection and anti-slip system which comprises a traveling crane, a power wheel assembly, a slag removal assembly, a speed reduction assembly and a track. The power wheel assemblies are arranged on the two sides of the travelling crane, the power wheel assemblies are arranged on the track, the slag removal assembly is arranged on the track in front of the power wheel assemblies, the speed reduction assembly is arranged on the side wall of the power wheel assemblies, and a speed reduction trigger rod is arranged in a distillation area on the track; when the traveling crane travels, the power wheel assembly travels on the track in the specified direction, when the traveling crane travels to a distillation area, deceleration of the power wheel assembly is achieved through the deceleration trigger rod, meanwhile, the deslagging assembly is started in a linkage mode, the surface of the track in the distillation area is cleaned, the whole traveling process is more stable, and the service life of the traveling crane is prolonged. And the safety of operators in the distillation area is ensured.

The utility model relates to the technical field of motor monitoring, and discloses a parking anti-running device for monitoring current, voltage and motor operation time in real time, the system comprises an operation data acquisition module, the input end of the operation data acquisition module is connected with a motor to be tested, and the operation data acquisition module is used for acquiring real-time operation data of the motor to be tested; the input end of the communication module is connected with the output end of the operation data acquisition module, the output end of the communication module is connected with the input end of the data processing and early warning module, and the communication module is used for transmitting the real-time operation data of the tested motor to the data processing and early warning module; and the data processing and early warning module is used for processing and analyzing the real-time operation data of the tested motor to obtain a motor monitoring result and carrying out early warning according to the motor monitoring result. According to the utility model, the real-time operation data of the motor is acquired, the communication module is used to transmit the real-time operation data to the data processing and early warning module, and the process data is monitored in real time, so that the accurate control and fault early warning of the motor state are realized, and the reliability and maintenance efficiency of the motor are improved.

The present application belongs to the technical field of train parking under high temperature environment, and discloses a railway train parking device working under the blast furnace tapping hole, which comprises a transmission mechanism, a reciprocating driving assembly and two brake rails. The transmission mechanism comprises a first transmission rod, a second transmission rod and a plurality of cross assemblies, the cross assembly comprises a first booster arm and a second booster arm, the first booster arm and the second booster arm are rotationally connected at the cross, the first booster arm is provided with a first guide part extending along the length direction of the first booster arm, the first transmission rod is rotationally and slidingly connected to each first guide part, the second booster arm is provided with a second guide part extending along the length direction of the second booster arm, and the second transmission rod is rotationally and slidingly connected to each second guide part. The reciprocating driving assembly is provided with a first connecting section and a second connecting section, the first booster arm is provided with a third guide part extending along the length direction of the first booster arm, the second booster arm is provided with a fourth guide part extending along the length direction of the second booster arm, and the first connecting section is rotationally and slidingly connected to the third guide part.

An intelligent magnetic-attraction precise large-force braking system comprises a magnetomotive force module (0-01), a magnetic conduction module (0-02), a combination module (0-03), a pushing module (0-04) and an intelligent control module (0-05) and is used for conducting intelligent anti-slip and braking on a vehicle in railway shunting operation, and the magnetomotive force module (0-01) is used for generating a magnetic field through a direct-current electromagnetic coil; magnetic force is transmitted to two side edges of a wheel set of the railway vehicle through the magnetic conduction module (0-02) with the help of the combination module (0-03) to form a closed magnetic circuit, and the control module (0-05) controls the magnetic conduction module (0-02) through data received by a sensor and external control instructions. And the control module (0-04) controls the push module (0-04) to do telescopic motion, and controls the magnetic field direction and the current magnitude of an electromagnetic coil of the magnetomotive force module (0-01), so that the anti-slip braking and relieving functions of the intelligent magnetic suction precise strong braking system are completed, and the purposes of improving the shunting operation efficiency and liberating the physical strength of shunting personnel are achieved.

A kind of uncontrolled parking device, a pair of brake rails (1), several pairs of energy-storable support arm assemblies (5), bottom beam assembly (4) for limiting support arm assembly (5) between basic rail, each pair of support arm assembly (5) acts in the action plane vertical to basic rail, brake rail (1) is fixed outside corresponding support arm assembly (5) respectively;In no-load state, the distance between brake surface (1-2) of brake rail (1) is greater than the inside distance of wheel, and its technical key points are: in loaded state, energy storage mechanism is extruded and exports reaction force and generates friction force outwardly.The present application has the advantages of simple structure, compact, flexible limit height adjustment, strong adaptability, easy installation, less maintenance, less investment, convenient to use and the like.

A conditioning device for applying conditioning agent to the wheel face (46) and wheel back surface (47) of wheels (39) of railway vehicles comprises at least one brush (20) with bristles, a support (14) on which the brush (20) is mounted and which has a bearing surface (27) with which it rests, for example, on a sleeper (2) of a track (3), and a line (48) for supplying the conditioning agent to the brush (20). The line (48) opens between the bristles of the brush (20). This ensures good distribution of the conditioning agent within the brush and good transfer of the conditioning agent to the wheel face (46) and wheel back surface (47).

The invention relates to a superconducting electromagnetic launching platform safety braking system, a launching platform comprises a track and a test skid car, a sliding rail is fixed on the track, the test skid car is provided with a sliding shoe matched with the sliding rail, and the braking system comprises a sliding shoe friction device, a sliding rail friction device and a clamping plate friction device. The sliding shoe friction device comprises an inner friction block fixed to the inner wall of the sliding shoe and an outer friction block fixed to the outer side wall of the sliding shoe, the sliding rail friction device and the clamping plate friction device are arranged at the ends of the sliding rail, and notches matched with the sliding rail friction device are formed in the two sides of the sliding rail. The sliding rail friction device comprises inner friction plates fixed to the two sides of the sliding rail and matched with the inner friction blocks, inner elastic buffering pieces are arranged between the inner friction plates and the sliding rail, the clamping plate friction device comprises L-shaped supports fixed to the two sides of the sliding rail, and outer friction plates matched with the outer friction blocks are fixed to the inner sides of the L-shaped supports. And an outer elastic buffer piece is arranged between the outer friction plate and the L-shaped bracket. The device has the advantages of being simple in structure, safe, reliable and high in practicability.

The utility model discloses a railway retarder of prevent internal water ice of winter, relate to railway retarder technical field, including retarder unit, and set up in the retarder unit outer surface for installation's installation unit, the retarder unit includes buffer assembly and sets up in the protection subassembly of buffer assembly inside, the installation unit includes the fixed component of setting up in the retarder unit outer surface and sets up the installation component of fixed component outer surface. The utility model discloses a casing, sliding oil cylinder, exhaust pipe, stop pin, upper bushing, lower bushing, water collecting tank body, spring, extrusion piston and one -way drain valve's mutual cooperation can conveniently assist to the train of railway on -going and carry out the retardation buffering, and the water of convenient discharge casing inside prevents ice, adopts the mutual cooperation of connecting sleeve, mounting seat, sleeve, stop washer, stud bolt and fixed nut can conveniently install railway retarder to increase the practicality of railway retarder.

The invention discloses a control device and a control system of a vehicle speed reducer. The control device of the vehicle speed reducer comprises an alternating current power supply AC; the AC is connected with the input end of the circuit breaker QF1 through the lightning protection module; the output end of the circuit breaker QF1 is respectively connected with the power supply input end of the first switching power supply module G1, the power supply input end of the second switching power supply module G2 and the primary side of the transformer TB; the power supply output end of the G1 and the power supply output end of the second switching power supply module G2 are respectively connected with the power supply input end of the PLC module; the power supply output end of the second switching power supply module G2 is also connected with the power supply input end of the switch TFA; the secondary side of the transformer TB is connected with the power supply input end of an original hydraulic control valve of the vehicle speed reducer through a rectifier bridge DB; and the switch TFA is in communication connection with the PLC module. According to the method, the original working state of the vehicle speed reducer in the hump control system can be safely and reliably controlled, and the control quality is ensured.

The utility model discloses an auxiliary braking and energy collecting integrated device for a railway line, which belongs to the technical field of rail transit and comprises an input device, a transmission device, a power generation device and an energy storage device which are sequentially connected. The transmission device and the power generation device are installed in the shell, and the shell is connected with the steel rail through a support. The auxiliary braking and energy collecting integrated device is researched on the basis of an existing retarder system, the designed auxiliary braking and energy collecting integrated device is installed between retarder bodies, driving safety is not affected, and part of kinetic energy generated when a train runs is converted into electric energy to be stored and applied while auxiliary braking and speed reduction are achieved. The device can rectify linear reciprocating motion into one-way rotating motion, obtains higher power output, efficiency and stability, not only can recycle part of energy of a train, but also can achieve the purpose of auxiliary braking, and solves the problem that when an existing train is braked, the braking efficiency is low. And large energy loss can be generated when auxiliary braking and speed reduction equipment along the railway works.

The invention relates to the technical field of rail looseness prevention, in particular to a railway braking rail self-fastening device which comprises a braking unit, a fastening assembly and a rail body connected to the braking unit, the fastening assembly comprises a clamping plate and a plurality of adjusting pieces, and a limiting cavity allowing the bottom of the rail body to be embedded is formed in one end of the clamping plate; an adjusting cavity is formed in the surface, facing the brake unit, of the clamping plate, positioning cavities are formed in the surfaces of the adjusting pieces, an embedded block is connected to the inner wall of each positioning cavity, an embedded groove is formed in the bottom wall of each adjusting cavity, and the surface of each embedded block abuts against the inner wall of the corresponding embedded groove to form limiting. And the rail body and the brake unit clamp the clamping plate and the plurality of adjusting sheets to form fixation. Through the arrangement of the clamping plate and the adjusting sheets, the clamping plate and the adjusting sheets are clamped by the clamping plate and the brake unit to form a fixed and filled rail body thinned volume, the contact area of the rail body and a train hub is ensured to be constant, the rail body is not prone to cracks after being used for a long time, and therefore the running safety of a train is improved.

This utility model relates to a special wheel stopper for endless rope winches, including a slide rail frame. An adjusting and limiting mechanism is provided on the outer side of the slide rail frame. The adjusting and limiting mechanism includes a storage frame fixedly installed on the front of the slide rail frame. Two protective covers are fixedly installed on the inner side of the slide rail frame. A movable wheel is rotatably connected inside the protective cover, and the slide rail body is slidably connected to the outer side of the movable wheel. This special wheel stopper for endless rope winches, through the adjusting and limiting mechanism, uses a brake motor and a bidirectional lead screw to drive two threaded blocks to move closer or further apart under the limiting rod's control. This drives the mounting base and friction pad to move until they are fitted and fixed to the limiting groove on the outer side of the slide rail body, facilitating rapid wheel stop movements. Alternatively, it can drive the two threaded blocks to move further apart, so that the friction pad no longer clamps and fixes the slide rail body, greatly improving the flexibility and practicality of the device.

An actuator apparatus includes an actuator rod with an interior cavity and a set of rod holes. Each rod hole extends through the actuator rod to the cavity. The set of rod holes is positioned in a straight line. The apparatus includes a light assembly that is positioned to light the cavity. The apparatus includes an actuator block that includes an opening extending through the actuator block sized to conform to an outer surface of the actuator rod and a set of block holes in the opening. Spacing between the block holes matches spacing between the rod holes. The actuator block includes a light sensor positioned in a block hole to sense light coming through a rod hole aligned with the block hole and a ball bearing for each block hole of the set of block holes without a light sensor and extending partially through the corresponding block hole.

The utility model discloses an inclined shaft sliding car safety protection device which comprises a sliding rail, supporting rods which are symmetrical left and right are arranged in the middle of the lower end of the sliding rail, a mounting box is arranged between the upper ends of the two supporting rods, and the inclined shaft sliding car safety protection device further comprises an emergency braking mechanism. The emergency braking mechanism comprises guide rods, sliding plates, supporting rods, extrusion strips, sliding grooves and check blocks, the left-right symmetrical guide rods are fixedly connected between the front inner wall and the rear inner wall of the mounting box, the front-back symmetrical sliding plates are slidably connected between the two guide rods, and the outer side ends of the sliding plates are fixedly connected with the evenly-distributed supporting rods correspondingly; according to the inclined shaft sports car safety protection device, when the inclined shaft sports car is subjected to safety protection, wheels of the inclined shaft sports car are extruded, so that the friction force of the wheels of the inclined shaft sports car is increased, the safety of the inclined shaft sports car is improved, and the safety of the inclined shaft sports car is improved. And the inclined shaft sliding car can be better intercepted, and use is convenient.

A system for retarding a railcar having wheels. The system includes a brake and an actuator that moves the brake between a closed position in which the brake contacts the wheels of the railcar and an open position in which the brake does not contact the wheels of the railcar. The system further includes a hydraulic circuit through which a hydraulic fluid flows between the actuator and a reservoir. A first pump is operably connected within the hydraulic circuit and configured to provide the hydraulic fluid to the actuator for operating the brake. A heat exchanger is operably connected within the hydraulic circuit and configured to cool the hydraulic fluid flowing therethrough. A second pump is operably connected within the hydraulic circuit and configured to provide the hydraulic fluid to the heat exchanger. The heat exchanger prevents the hydraulic fluid within the hydraulic fluid from exceeding a target operating temperature.

The invention discloses a double-acting railway vehicle speed regulating device. Relates to the field of railway marshalling station vehicle humping speed regulation. In order to solve the problems that an existing retarder is low in speed judgment precision and high in equipment failure rate, the hydraulic retarder comprises a speed judgment mechanism, a hydraulic damping mechanism, a pressure conduction mechanism and a mechanical clamping braking mechanism, and the speed judgment mechanism is matched with the hydraulic damping mechanism to limit the hydraulic oil flow, sense the hydraulic pressure change and decide whether to close a low-flow-speed channel or not; the hydraulic resistance of different grades is generated, the acting force of a wheel acts on one end of a movable force arm of the mechanical clamping brake machine through the pressure conduction mechanism, a clamping jaw is pushed to rotate, the acting force acts on the inner side of a rim, and the double-braking function is achieved. The valve plate corresponds to the oil hole up and down, the pressure valve is sleeved with the pressure valve sleeve, a sliding installation space is provided for the valve plate, the radial position of the valve plate is limited, and the speed regulation device is applied to the field of railway vehicle speed regulation.

The utility model discloses a railway brake deceleration support which comprises a fixing block installed on one side of a rail, one side of the fixing block is fixedly connected with a plurality of guide rods, the outer sides of every two adjacent guide rods are connected with sliding blocks in a sliding mode, the two sides of the fixing block are each provided with an insertion assembly for fixing the sliding blocks, and the insertion assemblies are connected with the guide rods in a sliding mode. A rotating block is arranged between the two sliding blocks, a mounting hole is formed in the top of the rotating block, a sliding sleeve is fixedly connected into the mounting hole, and a retarder is slidably connected into the sliding sleeve. According to the utility model, broken stones can be prevented from entering the sliding sleeve when the retarder is disassembled, the influence of the broken stones on the use of the retarder is prevented, the safety of the disassembly of the retarder is improved, the rotation of the rotating block can be avoided when the retarder does not need to be disassembled, the stability of the use of the speed reduction bracket is improved, and the working efficiency is improved. In addition, the sliding block can be prevented from moving on the guide rod in the using process of the speed reduction support, and the using stability of the speed reduction support is further improved.

The invention discloses an intelligent retarder capable of measuring the traveling speed of a coupler car. The intelligent retarder comprises a retarder shell, a brake oil cylinder arranged in the retarder shell in a sliding mode, a piston rod installed on the brake oil cylinder, a piston cap fixedly installed at the top end of the piston rod, a pressure valve base penetrating through the piston cap, and a pressure valve ball valve installed on the pressure valve base. The spring seat abuts against the pressure valve ball valve, the magneto-rheological blocking channels are used for communicating the upper cavity with the lower cavity, the induction electromagnetic coil and the permanent magnet are arranged in an open groove of an outer ring of the piston cap head, and the impact stopping seat is located below the retarder shell. According to the intelligent retarder, the magnetorheological fluid and a mechanical structure are combined, the intelligent retarder capable of measuring the advancing speed of the humping hook car is constructed, and the advancing speed of the humping car in the advancing process can be measured in real time under the working conditions of various types of railway vehicle speeds.

The utility model discloses a derailment collision energy absorption protection device which comprises a subway bullet train and a tunnel, a derailment detection sensor used for detecting whether the subway bullet train derails or not is installed on a bogie of the subway bullet train, and when the subway bullet train derails, the derailment detection sensor transmits a signal to a subway bullet train system. If yes, the metro bullet train system immediately sends a signal to a metro bullet train control system to trigger emergency braking of the metro bullet train to decelerate the metro bullet train, meanwhile, the self-locking hook is controlled to be mutually clamped and fixed with a fixing rod on the metro bullet train in a running state, the running metro bullet train pulls out the traction steel wire traction rope, and the metro bullet train is driven by the traction steel wire traction rope. The forward force of the metro bullet train is reduced through inertia of the counterweight rollers, kinetic energy of the metro bullet train can be absorbed, the speed of the metro bullet train is reduced, the metro bullet train can be controlled to make contact with a rail, and the derailing possibility of the metro bullet train is reduced through cooperation with an emergency braking assembly of the metro bullet train.

The present application relates to a kind of pulling train parking device, belong to train parking technical field;Including two rail clamping components, a pair of binding rope and a pair of traction rope, the binding rope sleeve ring of one end of binding rope is wound in the middle of the train axle on the side of deviating from the tendency of sliding, the binding rope sleeve ring of the other end of binding rope is connected to the middle of traction rope, two rail clamping components are respectively connected on two rails, two rail clamping components are connected by traction rope;The present application adopts split combination design, easy to install and disassemble, safe and reliable, good stability, can realize automatic locking after rail clamping component is accepted to bear, little affected by outside, using active pulling mode, as the reinforcing measures of existing anti-slip mode by friction resistance, can solve the problem that current measures to prevent train from sliding tendency are prone to accidents.

The utility model discloses a brake noise reduction mechanism and a vehicle speed reducer. The brake noise reduction mechanism comprises a brake beam, a noise reduction clamping plate, a first end clamping plate, a second end clamping plate, a vibration reduction clamping plate and a vibration reduction cushion plate. A first end clamping plate and a second end clamping plate are arranged at the front and rear ends of the left side of the brake beam; a plurality of noise reduction clamping plates are arranged at the position, between the first end clamping plate and the second end clamping plate, of the left side of the brake beam. The brake beam is connected with the tops of the left ends of a plurality of original brake calipers of the vehicle speed reducer; a damping base plate is arranged between the brake beam and the top of the left end of each brake caliper; the top of the brake caliper is provided with a brake beam contact part on the right side of the caliper arm; a damping clamping plate is arranged between the right side of the brake beam and the brake beam contact part; the brake beam comprises a left brake part, a middle section connecting part and a right brake caliper contact part. The brake noise reduction device is scientific in design and can effectively reduce the brake noise of the vehicle speed reducer of the railway marshalling station.

The utility model provides a kind of motor-driven inner support type parking anti-slip device, including two groups of brake rail, two groups the brake rail are located inside track, the end of two brake rail is provided with slope, brake assembly is arranged between two groups brake rail along its length direction array, the brake assembly is connected by ball cage coupling, the ball cage coupling one end is provided with power component, at least one brake assembly is provided with pressure sensor.The utility model has the advantages of adjustable braking force, interchangeable lifting type and flat push type key components, self-locking.

A hydraulic locking controllable parking device, comprising a pair of brake rails (1), a bottom beam assembly (4), a plurality of pairs of left and right branch arm assemblies (5) and (6) capable of storing energy, a hydraulic locking assembly (8) for driving the left and right branch arm assemblies (5) and (6) to act, each pair of left and right branch arm assemblies (5) and (6) acts in a plane perpendicular to the basic rail, and the brake rails (1) are fixed outside the corresponding left and right branch arm assemblies (5) and (6) respectively; in the no-load state, the distance between the brake surfaces (1-2) of the brake rails (1) is greater than the inside distance of the wheels, and the technical key points are that in the loaded state, the energy storage mechanism is extruded and outputs the reaction force and generates the friction force outward. It has the advantages of simple and compact structure, easy installation, convenient adjustment limit, fast work position conversion speed, low energy consumption, less maintenance, convenient use and the like.

The application discloses a long-distance gradually changing braking force friction plate type energy absorber, which comprises a machine base, a fixed mandrel fixed to the machine base, a secondary roller coaxially connected to the fixed mandrel in sequence from left to right, a sliding nut, a plurality of springs, a compression block and a main roller, a main steel wire rope wound around the main roller and a secondary steel wire rope wound around the secondary roller, a plurality of fixed friction plates installed on the fixed mandrel, a plurality of movable friction plates coaxially and alternately contacted with the fixed friction plates and installed in holes of the main roller, and the secondary steel wire rope is fixedly connected with the extending end of the main steel wire rope; the outer thread of the sliding nut is matched with the inner thread B of the secondary roller, the outer thread B of the secondary roller is matched with the inner thread A of the machine base, the outer thread B and the inner thread B have the same rotation direction, the secondary steel wire rope drives the secondary roller to rotate when the sports car brakes, so that the secondary roller moves to the side of the compression spring, and the pitch of the outer thread B is slightly larger than that of the inner thread B, so that the sliding nut slowly compresses the spring to increase the friction force, and the long-distance mechanical autonomous buffer braking advantage is achieved, and the safety of people and machines is effectively ensured.

The utility model discloses an anti-slip car stopping structure of an inclined monorail crane track, and relates to the technical field of anti-slip car stopping structures, the anti-slip car stopping structure of the inclined monorail crane track comprises a monorail trolley, two sides of the monorail trolley are respectively and symmetrically provided with a car stopping mechanism and an anti-slip structure; the car stopping structure is located at the front end of the anti-slip mechanism. According to the anti-slip mechanism, resistance is generated in advance through mechanical contact, the sliding speed is reduced, impact force during emergency braking is reduced, and shaking and derailing of the monorail trolley or goods caused by sudden braking are avoided; the rotating rod on the anti-slip mechanism can flexibly rotate through the bearing and the limiting ring and can adapt to the gradient change of the track or the posture adjustment of the monorail trolley, and it is ensured that the anti-slip function is always effective.

The invention relates to an anti-slip blocking device and method for a shield battery car, and belongs to the technical field of tunnel construction safety monitoring and control. The method comprises the steps that S1, a fixed blocking end and a mobile monitoring end are arranged; s2, constructing a sliding time window observer; s3, deducing a total energy model containing a conversion trend of current kinetic energy and future potential energy, and reversely resolving a critical interception speed and a residual safety time window required for accelerating the vehicle to the speed according to a mechanical energy absorption threshold value of the fixed interception end; and S4, executing hierarchical response and physical interception. According to the method, the acceleration behavior of the vehicle on the downhill road section can be pre-judged, so that when the vehicle speed does not reach a dangerous value but the trend is irreversible, the remaining safety time window is calculated in advance, and it is ensured that interception is completed within the mechanical energy absorption threshold value of the fixed interception end.

The utility model discloses a controllable parking device with a wear-resistant patch, which is mainly used at the tail part of a railway marshalling yard. The controllable parking device with the wear-resistant paste comprises a parking device body, a rail bearing plate is fixedly connected to the upper surface of the parking device body, a braking rail is arranged on the upper surface of the rail bearing plate in an attached mode, a strip-shaped hole is formed in the braking rail, a fixing bolt is arranged on the inner wall of the strip-shaped hole in an attached mode, and a first threaded hole is formed in the rail bearing plate. According to the controllable parking device disclosed by the utility model, through the matching of the stop block, the U-shaped wear-resistant paste, the trapezoidal groove, the trapezoidal cushion block, the second threaded hole, the double-thread screw rod, the bearing, the connecting plate and the rotating block, a user can adjust the position of the brake rail on the controllable parking device according to the wear degree of the brake rail and the fatigue degree of a brake spring on the parking device main body; and the abraded brake rail can still effectively brake the wheels, so that the service life of the brake rail of the controllable parking device is effectively prolonged.

A clamping and fixing type outer side short retarder is technically characterized by comprising a sliding oil cylinder assembly (1) installed in an inner cavity of a shell assembly (2); the shell assembly (2) is installed in a shell empty groove of the base assembly (3) through a spring washer (3-5) and a bolt (4). The shell assembly (2) comprises a shell (2-1) and a wing plate (2-2) welded on the shell (2-1); and the base assembly (3) comprises a clamping plate (3-1), a connecting plate (3-2), a screw rod (3-3) and a nut (3-6). The device has the advantages of simple structure, convenience and quickness in installation, safety, better economic benefit and the like.

The utility model relates to a rail mechanical wheel braking structure, which belongs to the field of mechanical wheel braking and comprises a mounting body. The protection assembly is arranged on the inner side of the mounting main body in a sliding manner; the limiting assembly is arranged on the inner side of the mounting main body, comprises a mounting plate and is arranged on the mounting main body; the limiting block is arranged on the side, close to the protection assembly, of the mounting plate; and the brake assembly is detachably arranged on the mounting main body. By means of the protection assembly, the liner is made of polytetrafluoroethylene composite materials, is in an arc shape and is matched with the upper surface of the track, abrasion between the installation body and the track is effectively reduced, the service life of the track and the installation body is remarkably prolonged, and meanwhile, through the limiting assembly and the braking assembly, the service life of the track is prolonged. The limiting stability of the transformer rail trolley can be improved, and the braking assembly can be rapidly replaced, so that the transformer rail trolleys of different specifications can be limited.