阅读说明：本技术 一种可紧急制动式矿车 (Emergency braking type mine car ) 是由 韩翠翠 于 2021-02-05 设计创作，主要内容包括：本发明公开了一种可紧急制动式矿车,包括底板,底板上固定安装有车斗,底板底部固定连接有多个连接座,连接座间转动设有转杆,转杆两端固定连接有行走轮,连接座内壁上固定连接有制动腔室,转杆转动设置在制动腔室内,制动腔室内固定连接有制动环,制动环与制动腔室外壁间设有隔热层；与现有技术相比,本发明在脱链或者断绳的情况下,转杆的转速提高,在转速提高的同时,内部的离心力也会增加,伸缩杆能够在离心力的作用下向外移动,与制动环表面相抵,与橡胶层之间产生摩擦,慢慢降低转轴的转速,能够在紧急制动前降低矿车的运行速度,避免紧急制动时矿车的运行速度过快导致翻车的情况出现,导致矿车损坏。(The invention discloses an emergency braking type mine car which comprises a bottom plate, wherein a car hopper is fixedly installed on the bottom plate, the bottom of the bottom plate is fixedly connected with a plurality of connecting seats, rotating rods are rotatably arranged among the connecting seats, two ends of each rotating rod are fixedly connected with traveling wheels, the inner walls of the connecting seats are fixedly connected with braking chambers, the rotating rods are rotatably arranged in the braking chambers, braking rings are fixedly connected in the braking chambers, and heat insulation layers are arranged between the braking rings and the outer walls of the braking chambers; compared with the prior art, the rotating rod has the advantages that the rotating speed of the rotating rod is increased under the condition of chain disconnection or rope breakage, the internal centrifugal force is increased while the rotating speed is increased, the telescopic rod can move outwards under the action of the centrifugal force and is abutted against the surface of the brake ring to generate friction with the rubber layer, the rotating speed of the rotating shaft is slowly reduced, the running speed of the mine car can be reduced before emergency braking, and the condition that the mine car is overturned due to the fact that the running speed of the mine car is too high during emergency braking is avoided, and the mine car is damaged.)

1. An emergency braking mine car, comprising a base plate (1), characterized in that: fixed mounting has car hopper (2) on bottom plate (1), a plurality of connecting seats of bottom plate (1) bottom fixedly connected with (11), it is equipped with bull stick (31) to rotate between connecting seat (11), bull stick (31) both ends fixedly connected with walking wheel (311), fixedly connected with braking cavity (3) on connecting seat (11) inner wall, bull stick (31) rotate and set up in braking cavity (3), fixedly connected with braking ring (321) in braking cavity (3), be equipped with insulating layer (32) between braking ring (321) and braking cavity (3) outer wall.

2. An emergency brakable mine car as defined in claim 1, wherein: a plurality of liquid storage cavities (33) are formed in the rotating rod (31), an elastic wall is fixedly arranged at the bottom of each liquid storage cavity (33), a fixing ball (34) is fixedly connected onto each liquid storage cavity (33), a water outlet pipe (343) is arranged in each fixing ball (34), each water outlet pipe (343) is arc-shaped, flow limiting ports are formed in two sides of each water outlet pipe (343), arc-shaped grooves (342) are fixedly connected onto two sides of each fixing ball (34), piston rods (341) are arranged in the arc-shaped grooves (342) in a sliding mode, one end of each piston rod (341) abuts against the corresponding flow limiting port, extrusion cavities (35) are fixedly connected onto the fixing balls (34), a pair of arc-shaped plates (351) are symmetrically arranged inside the extrusion cavities (35), each arc-shaped plate (351) has elasticity, each arc-shaped plate (351) is fixedly connected onto the inner wall of each extrusion cavity (35), and movable rods (36) are, the movable rod (36) is fixedly connected with a limiting ball (361).

3. An emergency brakable mine car as defined in claim 1, wherein: the utility model discloses a friction plate, including bull stick (31), activity chamber (38) have been seted up to bull stick (31) inside, activity chamber (38) both sides and arc wall (342) fixed connection, activity chamber (38) internalization is inserted and is equipped with telescopic link (37), telescopic link (37) bottom fixedly connected with reset spring (373), reset spring (373) one end fixed connection is in activity chamber (38) inner wall bottom, activity chamber (38) inside is equipped with stop gear (6), telescopic link (37) top fixedly connected with friction plate (371), friction plate (371) inside fixed atmospheric pressure chamber (372) that is equipped with.

4. An emergency brakable mine car as claimed in claim 3, wherein: the limiting mechanism (6) comprises a pair of movable grooves (61) and a fixed groove (62), the movable grooves (61) and the fixed groove (62) are all arranged inside the telescopic rod (37), the fixed groove (62) is located between the movable grooves (61), a sliding plate (64) is arranged inside the fixed groove (62) in a sliding mode, one end of the sliding plate (64) is fixedly connected with a pair of elastic rods, one end of each elastic rod is fixedly connected onto the inner wall of the fixed groove (62), one end of the fixed groove (62) is fixedly connected with an air inlet pipe (63), one end of each air inlet pipe (63) is fixedly connected onto the bottom of the air pressure cavity (372), the bottom of the fixed groove (62) is fixedly connected with a pair of air conveying pipes (611), one end of each air conveying pipe (611) is fixedly connected onto the bottom of the movable groove (61), a sliding block is arranged in the movable, extrusion spring (65) one end fixed connection is on activity groove (61) inner wall, a plurality of spouts have been seted up on activity groove (61) lateral wall, and slide in the spout and be equipped with gag lever post (66).

5. An emergency brakable mine car as claimed in claim 2, wherein: stock solution chamber (33) bottom is equipped with drive mechanism (4), drive mechanism (4) are including transmission chamber (41), set up in stock solution chamber (33) bottom transmission chamber (41), articulated frame (42) of fixedly connected with on transmission chamber (41) inner wall, articulated on articulated frame (42) inner wall have connecting rod (43), connecting rod (43) one end fixedly connected with fixed plate, and fixedly connected with compression spring (45) between the fixed plate, articulated frame (42) one end fixedly connected with metal ball (44), metal ball (44) offset with the elastic wall.

6. An emergency brakable mine car as defined in claim 1, wherein: be equipped with self-locking mechanism (5) on brake ring (321) inner wall, self-locking mechanism (5) are including first gasbag (52) and second gasbag (55), first gasbag (52) all set up on brake ring (321) inner wall with second gasbag (55), fixedly connected with connecting pipe (53) between first gasbag (52) and second gasbag (55), it is equipped with a pair of limiting plate (51) to rotate on brake ring (321) inner wall, limiting plate (51) one end and second gasbag (55) outer wall fixed connection, fixed a plurality of toper teeth (54) that are equipped with on limiting plate (51) inner wall, fixedly connected with elastic rope on toper tooth (54) inner wall, and elastic rope one end fixed connection is on limiting plate (51) inner wall.

7. An emergency brakable mine car as claimed in claim 2, wherein: and compression cavities (362) are fixedly arranged at two ends of the limiting ball (361), and tapered grooves (363) are formed in the surfaces of the compression cavities (362).

8. An emergency brakable mine car as defined in claim 1, wherein: the surface of the brake ring (321) is provided with a rubber layer.

Technical Field

The invention relates to the technical field of coal mining, in particular to an emergency braking type mine car.

Background

The major danger source of coal mine transportation accidents when the mine car runs on the ascending and descending tracks is that malignant accidents caused by out-of-control mine car and the like are frequently found due to rope breakage or chain dropping during ascending and descending transportation, the transportation efficiency of the coal mine can be influenced, the mine car can be damaged, after general accidents occur, the mine car cannot be effectively braked, the mine car cannot be damaged or crashed, measures such as installation of a protection device and the like can only reduce loss, the mine car accidents cannot be fundamentally solved, and therefore the mine car capable of being emergently braked is provided for solving the problems.

Disclosure of Invention

The invention aims to provide an emergency braking type mine car to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a but emergency braking formula mine car, includes the bottom plate, fixed mounting has the car hopper on the bottom plate, a plurality of connecting seats of bottom plate fixedly connected with, it is equipped with the bull stick to rotate between the connecting seat, bull stick both ends fixedly connected with walking wheel, fixedly connected with braking cavity on the connecting seat inner wall, the bull stick rotates and sets up in the braking cavity, fixedly connected with brake ring in the braking cavity, be equipped with the insulating layer between brake ring and braking cavity outer wall, the insulating layer can avoid braking cavity surperficial high temperature, avoids the high coal cinder that leads to on the transportation track of high temperature or the coal ash in the air burning of being heated.

Preferably, the rotating rod is provided with a plurality of liquid storage cavities, the bottom of each liquid storage cavity is fixedly provided with an elastic wall, the liquid storage cavities are fixedly connected with a fixed ball, a water outlet pipe is arranged in the fixed ball, the water outlet pipe is arc-shaped, flow-limiting ports are arranged on two sides of the water outlet pipe, arc-shaped grooves are fixedly connected with two sides of the fixed ball, a piston rod is arranged in the arc-shaped grooves in a sliding manner, one end of the piston rod is abutted against the flow-limiting ports, the fixed ball is fixedly connected with an extrusion cavity, a pair of arc-shaped plates are symmetrically arranged in the extrusion cavity, the arc-shaped plates have elasticity, the arc-shaped plates are fixedly connected on the inner wall of the extrusion cavity, a movable rod is movably inserted in the extrusion cavity, the movable rod is fixedly connected with a limiting ball, the movable cavity moves outwards due to the telescopic rod, the liquid in the liquid storage cavity can be conveyed to the extrusion cavity through the water outlet pipe under the action of centrifugal force, the rotating speed of the rotating rod is slowed down to some extent under the action of the friction plate, and the movable rod can be popped out under the action of water pressure and the arc-shaped plate.

Preferably, the movable cavity has been seted up to the bull stick inside, activity chamber both sides and arc wall fixed connection, the activity intracavity activity is inserted and is equipped with the telescopic link, telescopic link bottom fixedly connected with reset spring, reset spring one end fixed connection is in activity intracavity wall bottom, activity intracavity portion is equipped with stop gear, telescopic link top fixedly connected with friction plate, the inside fixed atmospheric pressure chamber that is equipped with of friction plate, the telescopic link can outwards remove under the effect of centrifugal force, offsets with the brake ring surface, and the rubber layer between produces the friction, slowly reduces the rotational speed of bull stick.

Preferably, the limiting mechanism comprises a pair of movable grooves and fixed grooves, the movable grooves and the fixed grooves are both arranged in the telescopic rod, the fixed grooves are positioned between the movable grooves, a sliding plate is arranged in the fixed grooves in a sliding manner, one end of the sliding plate is fixedly connected with a pair of elastic rods, one end of each elastic rod is fixedly connected to the inner wall of the fixed groove, one end of each fixed groove is fixedly connected with an air inlet pipe, one end of each air inlet pipe is fixedly connected to the bottom of the air pressure cavity, the bottom of the fixed groove is fixedly connected with a pair of air delivery pipes, one end of each air delivery pipe is fixedly connected to the bottom of the movable groove, a sliding block is arranged in the movable groove in a sliding manner, an extrusion spring is fixedly connected to the sliding block, one end of the extrusion spring is fixedly connected to the inner wall of the, the heat that produces can conduct to the atmospheric pressure chamber, can drive the slide and remove, carries the gas-supply pipe of fixed slot inside to the activity inslot, can drive the slider and remove, makes extrusion spring atress compression, and the inside atmospheric pressure of activity inslot increases simultaneously, can make the gag lever post in the spout stretch out, supports on the activity intracavity wall, avoids retracting under the frictional condition with the rubber layer, influences the efficiency that the mine car slowed down.

Preferably, stock solution chamber bottom is equipped with drive mechanism, drive mechanism includes the transmission chamber, the transmission chamber is seted up in stock solution chamber bottom, the articulated frame of fixedly connected with on the transmission intracavity wall, it has the connecting rod to articulate on the articulated frame inner wall, connecting rod one end fixedly connected with fixed plate, and fixedly connected with compression spring between the fixed plate, articulated frame one end fixedly connected with metal ball, metal ball offsets with the elastic wall, and after the metal ball reached certain upper limit at the bull stick rotational speed, can outwards remove under the effect of centrifugal force, make articulated frame take place deformation, produce the extrusion to the elastic wall.

Preferably, the inner wall of the brake ring is provided with a self-locking mechanism, the self-locking mechanism comprises a first air bag and a second air bag, the first air bag and the second air bag are both arranged on the inner wall of the braking ring, a connecting pipe is fixedly connected between the first air bag and the second air bag, a pair of limiting plates are rotatably arranged on the inner wall of the brake ring, one end of each limiting plate is fixedly connected with the outer wall of the second air bag, a plurality of conical teeth are fixedly arranged on the inner wall of the limiting plate, elastic ropes are fixedly connected on the inner walls of the conical teeth, one end of the elastic rope is fixedly connected to the inner wall of the limit plate, the movable rod can be popped out under the action of water pressure and the arc-shaped plate, so that the limit ball is abutted against the first air bag, after the first air bag is impacted by the limit ball, can carry the gas of inside to the second gasbag through the connecting pipe, the second gasbag can expand, drives the limiting plate and rotates, makes limiting plate inner wall and compression chamber surface offset.

Preferably, the fixed compression chamber that is equipped with in spacing ball both ends, compression chamber surface is equipped with the tapered groove, and the toper tooth can be blocked and establish in the tapered groove, can restrict the position of movable rod, avoids the movable rod to retract.

Preferably, the surface of the brake ring is provided with a rubber layer, and the rubber layer can rub with the friction plate to slowly reduce the rotating speed of the rotating rod.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, under the condition of chain disconnection or rope breakage, the rotating speed of the rotating rod is increased, the internal centrifugal force is increased while the rotating speed is increased, the telescopic rod can move outwards under the action of the centrifugal force and is abutted against the surface of the brake ring to generate friction with the rubber layer, the rotating speed of the rotating shaft is slowly reduced, the running speed of the mine car can be reduced before emergency braking, and the condition that the mine car is overturned due to the fact that the running speed of the mine car is too high during emergency braking is avoided, so that the mine car is damaged;

2. according to the invention, the friction plate and the rubber layer rub against each other, the generated heat can be conducted to the air pressure cavity, the sliding plate can be driven to move in the fixed groove, the gas in the fixed groove is conveyed into the movable groove through the gas conveying pipe, the sliding block can be driven to move, so that the extrusion spring is stressed and compressed, meanwhile, the air pressure in the movable groove is increased, the limiting rod in the sliding groove can extend out and abut against the inner wall of the movable cavity, and the mine car is prevented from retracting under the condition of rubbing against the rubber layer to influence the speed reduction efficiency of the mine car;

3. the invention can ensure that the piston rod moves in the arc shape through the outward movement of the movable cavity due to the telescopic rod, one end of the piston rod leaves the flow limiting port, the liquid in the liquid storage cavity can be conveyed to the extrusion cavity through the water outlet pipe under the action of centrifugal force and can be positioned at the bottom of the self-locking structure along with the rotation of the rotating rod, the movable rod can be popped out under the action of water pressure and the arc plate to ensure that the limiting ball is abutted against the first air bag, the first air bag can convey the gas in the first air bag to the second air bag through the connecting pipe after being impacted by the limiting ball, the second air bag can expand to drive the limiting plate to rotate, so that the inner wall of the limiting plate is abutted against the surface of the compression cavity, and simultaneously, after colliding with the first air bag, the movable rod can retract to one end distance under the action of reaction force to ensure that the conical tooth is clamped in the conical groove to limit the, the retraction of the movable rod is avoided, the rotating rod can be braked emergently, and the accident that the mine car is crashed or damaged is avoided;

4. according to the invention, the heat insulating layer can prevent the heat generated during braking from being transferred to the surface of the braking chamber, so that the temperature of the surface of the braking chamber is too high, and the coal cinder on the transportation rail or the coal ash in the air can be prevented from being heated and combusted due to the too high temperature.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of a brake chamber of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 2 at B according to the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 2 at C in accordance with the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 3 according to the present invention;

in the figure: 1. a base plate; 2. a car hopper; 3. a brake chamber; 4. a transmission mechanism; 5. a self-locking mechanism; 6. a limiting mechanism; 11. a connecting seat; 31. a rotating rod; 311. a traveling wheel; 32. a thermal insulation layer; 321. a brake ring; 33. a liquid storage cavity; 34. fixing the ball; 341. a piston rod; 342. an arc-shaped slot; 343. a water outlet pipe; 35. an extrusion chamber; 351. an arc-shaped plate; 36. a movable rod; 361. a limiting ball; 362. a compression chamber; 363. a tapered groove; 37. a telescopic rod; 371. a friction plate; 372. a pneumatic chamber; 373. a return spring; 38. a movable cavity; 41. a transmission cavity; 42. a hinged frame; 43. a connecting rod; 44. a metal ball; 45. a compression spring; 51. a limiting plate; 52. a first air bag; 53. a connecting pipe; 54. a tapered tooth; 55. a second air bag; 61. a movable groove; 611. a gas delivery pipe; 62. fixing grooves; 63. an air inlet pipe; 64. a slide plate; 65. a compression spring; 66. a limiting rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: the utility model provides a but emergency braking formula mine car, comprising a base plate 1, fixed mounting has car hopper 2 on the bottom plate 1, a plurality of connecting seats of 1 bottom fixedly connected with 11 of bottom plate, it is equipped with bull stick 31 to rotate between 11 connecting seats, 31 both ends fixedly connected with walking wheels 311 of bull stick, fixedly connected with braking cavity 3 on the 11 inner walls of connecting seat, bull stick 31 rotates and sets up in braking cavity 3, fixedly connected with braking ring 321 in the braking cavity 3, be equipped with insulating layer 32 between braking ring 321 and 3 outer walls of braking cavity, the insulating layer 32 can avoid braking cavity 3 surperficial high temperatures, avoid the high coal cinder that leads to on the transportation track of high temperature or the coal ash in the air burning of being heated.

A plurality of liquid storage cavities 33 are formed in the rotating rod 31, elastic walls are fixedly arranged at the bottoms of the liquid storage cavities 33, fixed balls 34 are fixedly connected to the liquid storage cavities 33, water outlet pipes 343 are arranged in the fixed balls 34, the water outlet pipes 343 are arc-shaped, flow-limiting ports are arranged on two sides of the water outlet pipes 343, arc-shaped grooves 342 are fixedly connected to two sides of the fixed balls 34, piston rods 341 are slidably arranged in the arc-shaped grooves 342, one ends of the piston rods 341 are abutted against the flow-limiting ports, extrusion cavities 35 are fixedly connected to the fixed balls 34, a pair of arc-shaped plates 351 are symmetrically arranged in the extrusion cavities 35, the arc-shaped plates 351 have elasticity, the arc-shaped plates 351 are fixedly connected to the inner walls of the extrusion cavities 35, movable rods 36 are movably inserted in the extrusion cavities 35, limit balls 361 are fixedly connected to the movable rods 36, the movable cavities 38 move outwards due to expansion rods 37, the liquid in the liquid storage cavity 33 can be conveyed to the extrusion cavity 35 through the water outlet pipe 343 under the action of centrifugal force, at this moment, the rotating speed of the rotating rod 31 is slowed down under the action of the friction plate 371, and the movable rod 36 can be popped out under the action of water pressure and the arc-shaped plate 351.

The inside activity chamber 38 of having seted up of bull stick 31, activity chamber 38 both sides and arc wall 342 fixed connection, activity intracavity 38 internalization is inserted and is equipped with telescopic link 37, telescopic link 37 bottom fixedly connected with reset spring 373, reset spring 373 one end fixed connection is in activity chamber 38 inner wall bottom, the inside stop gear 6 that is equipped with of activity chamber 38, telescopic link 37 top fixedly connected with friction plate 371, the inside fixed atmospheric pressure chamber 372 that is equipped with of friction plate 371, telescopic link 37 can outwards move under the effect of centrifugal force, with brake ring 321 surperficial counterbalance, and produce the friction between the rubber layer, slowly reduce the rotational speed of bull stick 31.

The limiting mechanism 6 comprises a pair of movable grooves 61 and fixed grooves 62, the movable grooves 61 and the fixed grooves 62 are both arranged inside the telescopic rod 37, the fixed grooves 62 are positioned between the movable grooves 61, a sliding plate 64 is arranged inside the fixed grooves 62 in a sliding manner, one end of the sliding plate 64 is fixedly connected with a pair of elastic rods, one end of each elastic rod is fixedly connected to the inner wall of the fixed groove 62, one end of each fixed groove 62 is fixedly connected with an air inlet pipe 63, one end of each air inlet pipe 63 is fixedly connected to the bottom of the air pressure cavity 372, the bottom of the fixed groove 62 is fixedly connected with a pair of air delivery pipes 611, one end of each air delivery pipe 611 is fixedly connected to the bottom of the movable groove 61, a sliding block is arranged in the movable groove 61 in a sliding manner, an extrusion spring 65 is fixedly connected to the inner wall of the movable groove 61, a, the heat of production can conduct to atmospheric pressure chamber 372, can drive slide 64 and remove, carries the gas of fixed slot 62 inside to movable groove 61 in through gas-supply pipe 611, can drive the slider and remove, makes extrusion spring 65 atress compression, and the inside atmospheric pressure of movable groove 61 increases simultaneously, can make the gag lever post 66 in the spout stretch out, supports on movable chamber 38 inner wall, avoids retracting under the frictional condition with the rubber layer, influences the efficiency that the mine car slowed down.

Stock solution chamber 33 bottom is equipped with drive mechanism 4, drive mechanism 4 includes transmission chamber 41, transmission chamber 41 is seted up in stock solution chamber 33 bottom, articulated frame 42 of fixedly connected with on the 41 inner walls of transmission chamber, it has connecting rod 43 to articulate on the articulated frame 42 inner wall, connecting rod 43 one end fixedly connected with fixed plate, and fixedly connected with compression spring 45 between the fixed plate, articulated frame 42 one end fixedly connected with metal ball 44, metal ball 44 offsets with the elastic wall, metal ball 44 reaches certain upper limit after the bull stick 31 rotational speed, can outwards remove under the effect of centrifugal force, make articulated frame 42 take place deformation, produce the extrusion to the elastic wall.

The inner wall of the brake ring 321 is provided with a self-locking mechanism 5, the self-locking mechanism 5 comprises a first air bag 52 and a second air bag 55, the first air bag 52 and the second air bag 55 are both arranged on the inner wall of the brake ring 321, a connecting pipe 53 is fixedly connected between the first air bag 52 and the second air bag 55, the inner wall of the brake ring 321 is rotatably provided with a pair of limiting plates 51, one end of each limiting plate 51 is fixedly connected with the outer wall of the second air bag 55, the inner wall of each limiting plate 51 is fixedly provided with a plurality of conical teeth 54, the inner wall of each conical tooth 54 is fixedly connected with an elastic rope, one end of each elastic rope is fixedly connected to the inner wall of each limiting plate 51, the movable rod 36 can be popped out under the action of water pressure and the arc-shaped plate 351, so that the limiting balls 361 abut against the first air bag 52, the first air bag 52 can convey the internal air to the second air bag 55 through the connecting, the inner wall of the restriction plate 51 is pressed against the surface of the compression chamber 362.

The two ends of the limiting ball 361 are fixedly provided with a compression cavity 362, the surface of the compression cavity 362 is provided with a tapered groove 363, and the tapered teeth 54 can be clamped in the tapered groove 363 to limit the position of the movable rod 36 and prevent the movable rod 36 from retracting.

The surface of the brake ring 321 is provided with a rubber layer which can rub against the friction plate 371 to gradually reduce the rotation speed of the rotary rod 31.

The working principle is as follows: firstly, when the mine car runs on an uphill track or a downhill track, the mine car is accelerated to move on the track due to the condition of rope breakage or chain release caused by accidents, so that the rotating speed of the rotating rod 31 is increased, the internal centrifugal force is increased while the rotating speed is increased, the metal balls 44 can move outwards under the action of the centrifugal force after the rotating speed of the rotating rod 31 reaches a certain upper limit, the hinge frame 42 is deformed to extrude the elastic wall, meanwhile, the expansion rod 37 can move outwards under the action of the centrifugal force to abut against the surface of the brake ring 321 to generate friction with the rubber layer, so that the rotating speed of the rotating rod 31 is reduced slowly, in addition, the generated heat of the friction plate 371 can be conducted to the air pressure cavity 372 under the condition of the friction with the rubber layer, the sliding plate 64 can be driven to move, the air in the fixed groove 62 is conveyed into the movable groove 61 through the air pipe 611 to drive the sliding, the extrusion spring 65 is stressed and compressed, meanwhile, the air pressure in the movable groove 61 is increased, the limiting rod 66 in the sliding groove can extend out and abut against the inner wall of the movable cavity 38, the retraction under the condition of friction with a rubber layer is avoided, the speed reduction efficiency of the mine car is influenced, the internal air pressure of the movable cavity 38 is reduced because the telescopic rod 37 moves outwards, the piston rod 341 can move in the arc-shaped groove 342, one end of the piston rod 341 leaves a flow limiting opening, the liquid in the liquid storage cavity 33 can be conveyed to the extrusion cavity 35 through the water outlet pipe 343 under the action of centrifugal force, at the moment, the rotating speed of the rotating rod 31 is reduced under the action of the friction plate 371, the movable rod 36 can abut against the rubber layer under the action of water pressure, friction is generated between the movable rod and the rubber layer, the compression cavity 362 can be heated and expanded to follow the rotation of the rotating rod 31, the movable rod 36 can be positioned, the movable rod 36 can be ejected under the action of water pressure and the arc-shaped plate 351, so that the limit ball 361 abuts against the first air bag 52, the first air bag 52 can convey the internal gas to the second air bag 55 through the connecting pipe 53 after being impacted by the limit ball 361, the second air bag 55 can expand to drive the limit plate 51 to rotate, the inner wall of the limit plate 51 abuts against the surface of the compression cavity 362, meanwhile, after the first air bag 52 collides, the movable rod 36 retracts to one end distance under the action of reaction force, the conical tooth 54 can abut against the outer wall of the compression cavity 362, the elastic rope can be pulled in the retraction process of the limit ball 361, the conical tooth 54 is clamped in the conical groove 363, the position of the movable rod 36 can be limited, the movable rod 36 can be prevented from retracting, the rotary rod 31 can be emergently braked, the accident of collision or residual collision can be avoided, after the emergently braked, the telescopic link 37 can retract under the effect of reset spring 373, and the inside atmospheric pressure of activity chamber 38 resumes normally, and piston rod 341 resets, can avoid the inside liquid backward flow in extrusion chamber 35, makes movable rod 36 keep the state of stretching out, plays spacing effect, avoids the mine car still to be in on the great track of slope after the braking, receives self gravity dysmorphism continuation operation, leads to the emergence of secondary accident.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.