51results about "Track brakes" patented technology

Embodiments herein disclose an electric railroad retarder having a plurality of retarder modules. A retarder module comprises a gear cam assembly disposed between a first brake unit and a second brake unit. The gear cam assembly comprises a first position arm plate and a second position arm plate that are connected to a cam using a first positioning arm and a second positioning arm. The cam rotates to perform one of: compress a first brake spring, a second brake spring, a third brake spring and a fourth brake spring to hold wheels of a railcar; decompress the first brake spring, the second brake spring, the third brake spring and the fourth brake spring to release the wheels of the railcar; and separate the first position arm plate from a first spring base plate, and the second position arm plate from a second spring base plate to allow insertion of a shim.

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.

The invention provides a railway vehicle control system and a control method thereof. The railway vehicle control system comprises a preset parking space, a moving vehicle, a trigger, a locking assembly and a control platform. The preset parking spaces are distributed on a driving road surface and are provided with trigger switches; a swing block is rotationally arranged at the top of the moving vehicle, and the swing block has a vehicle pushing state in which the swing block is kept upright and abuts against a cross beam at the bottom of the vehicle and a vehicle passing state in which the swing block swings around the rotating axis; the trigger is arranged on the mobile vehicle; the locking assembly comprises a plurality of wheel stoppers, and the wheel stoppers have the locking state that the wheel stoppers abut against vehicle wheels. The control platform is in communication connection with the moving trolley, the trigger and the multiple wheel stoppers. According to the railway vehicle control system provided by the invention, the swing block on the moving vehicle is switched between the vehicle pushing state and the swing state, so that the use flexibility is improved, the moving difficulty is reduced, and the moving efficiency of the vehicle is improved.

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.

The safety type parking anti-slip device comprises a supporting beam, stock rails are connected to the two ends of the supporting beam through fixing assemblies, a supporting unit is connected to the supporting beam, a supporting base is hinged to the supporting unit, a braking unit and an oil cylinder are connected to the two ends of the supporting base respectively, and a locking device is connected to the outer wall of a cylinder body of the oil cylinder. The invention further discloses an anti-slip method of the safety type parking anti-slip device. Equipment can be self-locked after braking and relieving, the anti-slip capacity of the equipment is not reduced when the equipment is powered off or has a pressure fault, the braking and relieving action state is not changed, parking safety can be guaranteed, and the problems that the braking and relieving action time of an electric parking anti-slip device is generally long, and a hydraulic parking anti-slip device cannot be locked when power is cut off or a hydraulic fault occurs are solved. And the braking capacity is reduced.

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 a self-sliding mine car speed reducing device which comprises a mine car body, a speed reducing mechanism and a blocking mechanism, a baffle is welded to the bottom of the mine car body, the speed reducing mechanism is arranged between the two sides of a rail, and the speed reducing mechanism comprises a cylinder body, a sliding groove, a sliding rail, a sliding rod, a piston and a compression spring. The blocking mechanism comprises a push head shell, an inclined wedge block, an extrusion groove, a push rod, a telescopic rod, a connecting rod, a tension spring, a guide rail, a collision strip, a pulley block, a guide groove and a connecting plate. The blocking mechanism is pushed by the mine car body to move forwards, the compression spring exerts counter-acting force on the mine car body, so that the mine car body is braked and decelerated, the inclined wedge blocks on the two sides of the blocking mechanism enter the opening end of the cylinder body, and the connecting rod in the blocking mechanism enables the collision strip to contract; the blocking mechanism is automatically pushed out and reset under the acting force of the spring, a good braking and speed reducing effect can be achieved for the mine car, the mine car is prevented from falling off the road when passing through a turn and a passageway, and safety accidents are avoided.

An intelligent electromagnetic braking system based on the wheel-rail relation comprises an electromagnetic unit (0-01), a pushing module (0-02), a control module (0-03) and a basic module (0-04) and is used for attracting wheel pairs of a railway vehicle to a steel rail through the system, and therefore the purpose of electromagnetic braking is achieved. Wherein the electromagnetic unit (0-01) is used for generating a strong magnetic field and forming a closed magnetic circuit with a steel rail and a wheel pair, so that strong magnetic attraction force is generated between the wheel pair and the steel rail; the pushing module (0-02) is used for adjusting the distance between the electromagnetic unit (0-01) and a vehicle wheel set; the control module (0-03) is used for coordinating intelligent work of the whole equipment, and the basic module (0-04) is used for conveniently and quickly nesting the whole equipment on a steel rail and a sleeper.

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.

The utility model relates to the technical field of coal mine safety equipment, in particular to an integrated car stopping device for inclined shaft mine car transportation. The integrated car stopping device for inclined shaft mine car transportation can effectively absorb kinetic energy generated when an inclined shaft mine car is out of control due to landslide in a multi-stage braking speed reduction mode, and ensures safe braking of the mine car. An integrated car stopping device for inclined shaft mine car transportation comprises bases, damping shafts and the like, the two bases are arranged front and back, and the damping shafts are connected to the left portions of the bases in a sliding mode. Friction braking is carried out through the wheel blocking plate and wheels of the mine car, meanwhile, friction is carried out on a rail through the friction plate, the mine car is decelerated, buffering and decelerating are further carried out on the mine car under the action of the first spring, the second spring and the third spring, and the purpose that the mine car can be decelerated through multi-stage braking is achieved. Kinetic energy generated when the inclined shaft mine car landslide is out of control is effectively absorbed, and the safe braking effect of the mine car is ensured.

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.

The utility model discloses an adjustable brake friction block of a groove-shaped rail, which comprises the groove-shaped rail, a brake friction block is arranged on the surface of the groove-shaped rail, the brake friction block is composed of a left clamping plate, a right clamping plate, a supporting strip and a fastening bolt, the left clamping plate and the right clamping plate are oppositely arranged, and the left clamping plate and the right clamping plate are oppositely arranged. A first connecting hole is formed in the left clamping plate, and a second connecting hole is formed in the right clamping plate. The left clamping plate and the right clamping plate are used for transmitting the pre-tightening force of the fastening bolt to the supporting strip and the groove-shaped rail, it is guaranteed that the brake friction block moves in the rail direction under the action of external force, and it is guaranteed that the pre-tightening force of the fastening bolt is kept constant through elastic deformation of the left clamping plate and the right clamping plate when the brake friction block works and is stressed. When the braking friction block slides along the track under the action of external force, rated friction braking force is generated through positive pressure applied to the left clamping plate and the right clamping plate.

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 utility model discloses a double-material rail surface steel rail structure, and belongs to the technical field of mine car deceleration control. The ground surface annular parking lot comprises a ground surface annular parking lot body, and steel rails are laid at the bottom of the ground surface annular parking lot body. A pressure-resistant rubber assembly is arranged on the surface of the steel rail, the pressure-resistant rubber assembly is composed of a base, a rubber block and a rib plate, a positioning hole is formed in the surface of the base, and a fixing bolt sequentially penetrates through the positioning hole and a connecting hole and is fixed to the steel rail and the pressure-resistant rubber assembly. The speed of the mine car before the mine car enters a working procedure point is effectively controlled, so that the mine car can enter the working procedure point at a stable speed, traffic collision accidents are avoided, safe operation of the annular parking lot is guaranteed, safety guarantee is effectively improved, the working environment is safer, the production safety coefficient is improved, and safe operation of the ground annular parking lot is guaranteed. And the production efficiency is effectively improved.

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 invention provides a multi-ring combined braking device for a mountain track conveyor. The multi-ring combined braking device comprises a track. The transportation mechanism comprises a frame body, a bottom plate and a traction rod; the first brake mechanism comprises a friction block, calipers and a reset spring; the second braking mechanism comprises a fixing frame and magnetic rails arranged at the bottom of the fixing frame, and the magnetic rails are symmetrically arranged on the two sides of the track; the control assembly is connected with the conveying mechanism through a traction rod, the control assembly comprises a hydraulic oil cylinder, a three-phase asynchronous motor, a controller and a sensor assembly which are electrically connected with one another, and the control assembly is used for controlling the two friction blocks to move towards the track when the sensor assembly detects that the brake is in a conventional braking mode; and when the sensor assembly detects that the transport vehicle is in the emergency braking mode, the two magnetic tracks are controlled to move towards the track, mechanical braking and emergency braking are linked, the safety problem is solved, the braking efficiency is improved, and potential safety hazards caused by turnover of the transport vehicle can be reduced.

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 utility model belongs to the technical field, and particularly relates to an electric inner supporting type parking anti-running device which comprises a brake rail, an inner supporting mechanism, a transmission mechanism and a driving mechanism. One end of the supporting arm assembly is connected with the brake rail, and a supporting roller and a pull-back roller are installed in an opening groove in the other end of the supporting arm assembly through pin shafts. The transmission mechanism comprises a wedge-shaped block assembly and a lower rack assembly, wherein the wedge-shaped block assembly pushes the supporting arm assembly I and the supporting arm assembly II to move reversely through a supporting idler wheel and a pull-back idler wheel. The transmission mechanism is high in mechanical conduction efficiency, good in functionality and applicability, simple in structure, stable, reliable, low in production and maintenance cost and high in structural strength.

The invention discloses a rail safety guarantee device and an open type vehicle speed reducer. The rail safety guarantee device comprises a first fixing block and a second fixing block. The two fixing blocks make contact with an open type rail bearing base of the open type vehicle speed reducer. Brake calipers are hinged to the two ends of the top of the open type rail bearing seat respectively, and brake rails are arranged on the opposite sides of the two brake calipers respectively; stock rails are arranged below the two brake rails; the opposite sides of the upper ends of the two fixing blocks are connected with the two ends of the stock rail bottom respectively. The first screw penetrates through the two fixing blocks and then is connected with the first nut. Bolt limiting parts are arranged at the lower parts of the second fixing blocks; second bolts penetrate through the lower portions of the two fixing blocks. The nut of each second bolt abuts against the front side of the open type rail bearing base. The front end of the second bolt is connected with the second nut. When a train vehicle passes through the open type vehicle speed reducer, even if the light vehicle clamping and jumping phenomenon occurs, the good electric connection state between the wheels and the stock rail can be guaranteed, and running of a rail circuit is guaranteed.