阅读说明：本技术 一种带有撞击缓冲功能的钢筋挂车 (Steel bar trailer with impact buffering function ) 是由 刘志林 于 2020-06-10 设计创作，主要内容包括：本发明公开的一种带有撞击缓冲功能的钢筋挂车,包括挂车,所述挂车内设有开口向上的车厢槽,所述车厢槽左右壁之间固定设有导杆,所述车厢槽左侧下壁面上放置设有左固定板,所述车厢槽右侧下壁面上放置设有右端面与所述车厢槽右壁相抵的右固定板,本发明通过将钢筋的惯性来推动活塞从而推动止动片对滚轮进行刹车减速,同时将钢筋极大的惯性动能转化为主动齿轮的转动动能,再通过底板的移动放下刹车轮,并将主动齿轮的动能传动到刹车轮,使刹车轮再一次对挂车进行减速,不仅对钢筋进行缓冲,并将钢筋的惯性用于刹车减速,极大降低了急刹过程中因钢筋惯性产生的危险。(The invention discloses a steel bar trailer with an impact buffering function, which comprises a trailer, wherein a carriage groove with an upward opening is arranged in the trailer, a guide rod is fixedly arranged between the left wall and the right wall of the carriage groove, a left fixing plate is arranged on the lower wall surface of the left side of the carriage groove, the right fixing plate with the right end surface abutting against the right wall of the carriage groove is arranged on the lower wall surface of the right side of the carriage groove, the invention pushes the piston by the inertia of the steel bar so as to push the stop block to brake and decelerate the roller, meanwhile, the great inertia kinetic energy of the steel bar is converted into the rotation kinetic energy of the driving gear, and then the brake wheel is put down through the movement of the bottom plate, and the kinetic energy of the driving gear is transmitted to the brake wheel, so that the brake wheel decelerates the trailer again, the reinforcing steel bar is buffered, and the inertia of the steel bar is used for braking and decelerating, so that the danger caused by the inertia of the steel bar in the emergency braking process is greatly reduced.)

1. The utility model provides a steel bar trailer with striking buffer function, includes the trailer, its characterized in that: a carriage groove with an upward opening is arranged in the trailer, a guide rod is fixedly arranged between the left wall and the right wall of the carriage groove, a left fixing plate is arranged on the lower wall surface on the left side of the carriage groove, a right fixing plate with a right end surface abutting against the right wall of the carriage groove is arranged on the lower wall surface on the right side of the carriage groove, a bottom plate is fixedly connected between the left fixing plate and the right fixing plate, the guide rod penetrates through the right fixing plate, the bottom plate and the left fixing plate, a buffer cavity is arranged on the upper side of the carriage groove on the left side of the left fixing plate, three piston cavities which are uniformly distributed in an up-and-down array manner are arranged in the left wall of the buffer cavity, piston rods which are right opposite to the piston cavities are respectively and fixedly connected to the left end of the left fixing plate, the left ends of the piston rods extend into the piston cavities, an upper channel is fixedly arranged in the left wall of the piston cavity, a power cavity is arranged on the left side of the left fixing plate on the downside of the piston cavity, a threaded rod extending into the power cavity is fixedly connected to the left end face of the left fixing plate, threads are arranged on the outer circular surface of the left end of the threaded rod, a driving gear is rotationally arranged on the left wall of the power cavity, a threaded groove with a right opening is formed in the driving gear, internal threads are arranged in the right end of the threaded groove, the threaded rod is in threaded engagement with the threaded groove to drive the driving gear to rotate, when the left end of the threaded rod is moved to the left wall of the threaded groove, the threaded groove is disengaged from the driving gear, the driving gear can continue to rotate, a transmission device is arranged on the lower side of the driving gear, a turnover cavity is arranged in the trailer in a, the turnover cavity is symmetrically arranged at the front and back of the turnover cavity and is provided with a rotating cavity communicated with the placing cavity, the upper right side of the turnover cavity is internally and fixedly provided with a rack on the bottom plate, the turnover cavity is arranged at the upper side of the turnover cavity, the front wall and the back wall of the turnover cavity rotate to form turnover teeth, the rack can be meshed with the upper side of the turnover cavity to drive the turnover teeth to rotate, the lower left end of the turnover teeth is fixedly connected with a turnover rod, the lower left end of the turnover rod is rotatably connected with a brake rod, and the outer circular surface of the brake rod is fixedly connected with.

2. The reinforced trailer with the impact buffering function as claimed in claim 1, wherein: the transmission device comprises a driven gear which is rotatably connected to the right wall of the power cavity and is in meshed connection with the lower end of the driving gear, a reversing meshing cavity is arranged in the right lower wall of the power cavity, a driving bevel gear which is fixedly connected to the driven gear is rotatably connected to the left wall of the reversing meshing cavity, a first transmission cavity is arranged in the rear wall of the reversing meshing cavity, a rotating shaft is rotatably connected between the rear wall of the reversing meshing cavity and the front wall of the first transmission cavity, a driven bevel gear which is fixedly connected to the front end of the rotating shaft and is in meshed connection with the driving bevel gear is arranged in the reversing meshing cavity, a transmission gear which is fixedly connected to the rear end of the first transmission cavity is rotatably arranged in the rear wall of the first transmission cavity, the lower end of the transmission gear is in meshed connection with a rotating gear which is rotatably connected to the rear wall of the, the front end of the rotating cavity is fixedly connected with a driving belt wheel which is rotatably connected to the front wall of the first transmission cavity, the right side and the rear side of the first transmission cavity are provided with a second transmission cavity, a communicating cavity is communicated between the first transmission cavity and the second transmission cavity, a synchronous rotating shaft which penetrates through the axis of the turning tooth is rotatably arranged between the front wall and the rear wall of the turning cavity, two ends of the synchronous rotating shaft extend into the front rotating cavity and the rear rotating cavity and are respectively and fixedly connected with synchronous belt wheels, the left side of the rotating cavity is respectively and fixedly connected with brake belt wheels on the outer circumferential surface of the brake rod before and after the placing cavity, a brake belt is respectively wound between the front brake belt wheel, the rear end of the synchronous rotating shaft extends into the second transmission cavity and is fixedly connected with a second belt wheel which is rotatably connected to the rear wall of the second transmission cavity, the second band pulley downside the wall rotates behind the second transmission chamber and is equipped with first band pulley, the second band pulley with jointly around being equipped with short belt between the first band pulley, first band pulley front side fixedly connected with rotate connect in the driven pulleys of second transmission chamber antetheca, driven pulleys with jointly around being equipped with power belt between the driving pulley.

3. The reinforced trailer with the impact buffering function as claimed in claim 1, wherein: the carriage groove lower side is equipped with three downward roller chamber of opening, and the first roller chamber is located place the chamber left side, and the second third roller chamber is located upset chamber right side, each rotate between the front and back wall of roller chamber and be connected with the gyro wheel axle, each in the gyro wheel chamber each gyro wheel axle excircle facial features fixedly connected with gyro wheel.

4. The reinforced trailer with the impact buffering function as claimed in claim 3, wherein: each the upper right side internal fixation of roller chamber is equipped with the locking chamber, upper right end intercommunication of locking chamber is equipped with down the passageway, down the passageway with go up the passageway intercommunication, the lower left wall of locking chamber slides and is equipped with and extends to the locking rod of roller intracavity, the upper right end fixedly connected with locking piston of locking rod, the laminating of the lower left end fixedly connected with of locking rod the locking piece of gyro wheel shape, in the locking chamber the lower left wall fixedly connected with of locking chamber has around the locking spring of the outer disc of locking rod, the upper right end fixed connection of locking spring in the terminal surface under the locking piston left side.

5. The reinforced trailer with the impact buffering function as claimed in claim 3, wherein: each roller shaft extends to the front and the back of the trailer, and the front end and the back end of each roller shaft are respectively and fixedly connected with front and back symmetrical wheels.

6. The reinforced trailer with the impact buffering function as claimed in claim 1, wherein: the left end face of the left fixing plate is fixedly connected with buffer springs which are distributed in an up-down uniform array mode, and the left ends of the buffer springs are fixedly connected to the left wall of the buffer cavity.

7. The reinforced trailer with the impact buffering function as claimed in claim 1, wherein: the trailer left end face downside fixedly connected with fixed block, fixed block left end face fixedly connected with couple.

8. The reinforced trailer with the impact buffering function as claimed in claim 1, wherein: be equipped with the opening recess that array distributes about and right in the fixed plate of a left side respectively, run through about in the fixed slot be equipped with each the just right fixed slot of recess, it passes to put in the recess the reinforcing bar of recess.

Technical Field

The invention relates to the technical field of construction steel transportation, in particular to a steel bar trailer with an impact buffering function.

Background

The reinforcing bar is one of the extremely important material in the building process, its wide application in various building structures, in reinforcing bar transportation process, because the reinforcing bar is longer and weight is great, freight train transportation has great risk, when meeting emergency and need emergency braking in the freight train driving process, often because the reinforcing bar has very big inertia on the trailer and leads to the reinforcing bar to dash forward to the driving position, injure driver's sexual life, the reinforcing bar that scatters out also can produce very big threat to road traffic, and because the great weight of reinforcing bar leads to the freight train brake difficulty, slow down. The present invention sets forth a device that solves the above problems.

Disclosure of Invention

The technical problem is as follows: in the reinforcing bar transportation process, truck emergency braking easily leads to the reinforcing bar dashing forward and harms the driver, and the big speed reduction difficulty of truck weight.

In order to solve the problems, the present example designs a steel bar trailer with an impact buffering function, which comprises a trailer, wherein a carriage groove with an upward opening is arranged in the trailer, a guide rod is fixedly arranged between the left wall and the right wall of the carriage groove, a left fixing plate is arranged on the lower wall surface at the left side of the carriage groove, a right fixing plate with a right end surface abutting against the right wall of the carriage groove is arranged on the lower wall surface at the right side of the carriage groove, a bottom plate is fixedly connected between the left fixing plate and the right fixing plate, the guide rod penetrates through the right fixing plate, the bottom plate and the left fixing plate, a buffering cavity is arranged at the upper side of the carriage groove at the left side of the left fixing plate, three piston cavities which are uniformly distributed in an up-and-down array manner are arranged in the left wall of the buffering cavity, and piston rods which are respectively and fixedly connected with, the left end of the piston rod extends into the piston cavity, the left end of the piston rod is fixedly connected with a piston, the right end of the piston rod abuts against the right wall of the piston cavity, high-pressure gas is arranged in the piston cavity, an upper channel is fixedly arranged in the left wall of the piston cavity, a power cavity is arranged at the lowest side of the piston cavity and on the left side of the left fixing plate, the left end surface of the left fixing plate is fixedly connected with a threaded rod extending into the power cavity, threads are arranged on the outer circular surface of the left end of the threaded rod, a driving gear is rotationally arranged on the left wall of the power cavity, a threaded groove with a right opening is arranged in the driving gear, internal threads are arranged at the right end of the threaded groove, the threaded rod is in threaded engagement with the threaded groove to drive the driving gear to rotate, when the left end of the threaded rod, the driving gear downside is equipped with transmission, in the trailer the bottom plate downside runs through and is equipped with the upset chamber, upset chamber left side intercommunication is equipped with the decurrent chamber of placing of opening, the symmetry around the upset chamber be equipped with place the rotation chamber of chamber intercommunication, the upper right side in upset chamber the bottom plate internal fixation is equipped with the rack, upset chamber upside rotate between the wall around the upset chamber and be equipped with the upset tooth, the rack is in upset chamber upside can mesh and drive the upset tooth rotates, the lower left end fixedly connected with trip lever of upset tooth, the lower left end of trip lever rotates and is connected with the brake lever, the very big brake wheel of disc fixedly connected with coefficient of surface friction outside the brake lever.

Preferably, the transmission device comprises a driven gear rotatably connected to the right wall of the power cavity and engaged with the lower end of the driving gear, a reversing engagement cavity is arranged in the right lower wall of the power cavity, a driving bevel gear fixedly connected to the driven gear is rotatably connected to the left wall of the reversing engagement cavity, a first transmission cavity is arranged in the rear wall of the reversing engagement cavity, a rotating shaft is rotatably connected between the rear wall of the reversing engagement cavity and the front wall of the first transmission cavity, a driven bevel gear fixedly connected to the front end of the rotating shaft and engaged with the driving bevel gear is arranged in the reversing engagement cavity, a transmission gear fixedly connected to the rear end of the first transmission cavity is rotatably arranged in the rear wall of the first transmission cavity, a rotating gear rotatably connected to the rear wall of the first transmission cavity is engaged with the lower end of the transmission gear, and a rotating cavity is fixedly connected to the front side of the rotating gear, the front end of the rotating cavity is fixedly connected with a driving belt wheel which is rotatably connected to the front wall of the first transmission cavity, the right side and the rear side of the first transmission cavity are provided with a second transmission cavity, a communicating cavity is communicated between the first transmission cavity and the second transmission cavity, a synchronous rotating shaft which penetrates through the axis of the turning tooth is rotatably arranged between the front wall and the rear wall of the turning cavity, two ends of the synchronous rotating shaft extend into the front rotating cavity and the rear rotating cavity and are respectively and fixedly connected with synchronous belt wheels, the left side of the rotating cavity is respectively and fixedly connected with brake belt wheels on the outer circumferential surface of the brake rod before and after the placing cavity, a brake belt is respectively wound between the front brake belt wheel, the rear end of the synchronous rotating shaft extends into the second transmission cavity and is fixedly connected with a second belt wheel which is rotatably connected to the rear wall of the second transmission cavity, the second band pulley downside the wall rotates behind the second transmission chamber and is equipped with first band pulley, the second band pulley with jointly around being equipped with short belt between the first band pulley, first band pulley front side fixedly connected with rotate connect in the driven pulleys of second transmission chamber antetheca, driven pulleys with jointly around being equipped with power belt between the driving pulley.

Preferably, three roller cavities with downward openings are arranged on the lower side of the carriage groove, the first roller cavity is located on the left side of the placing cavity, the second roller cavity is located on the right side of the overturning cavity, roller shafts are rotatably connected between the front wall and the rear wall of each roller cavity, and rollers are fixedly connected to outer circular surface subsections of the roller shafts in the roller cavities.

Preferably, each roller chamber upper right side internal fixation is equipped with the locking chamber, the upper right end intercommunication of locking chamber is equipped with down the passageway, down the passageway with go up the passageway intercommunication, the lower left wall of locking chamber slides and is equipped with the stop lever that extends to in the roller chamber, the upper right end fixedly connected with locking piston of stop lever, the lower left end fixedly connected with laminating of stop lever the stop piece of roller shape, in the locking chamber the lower left wall of locking chamber fixedly connected with have around the retaining spring of stop lever outer disc, the upper right end fixed connection of retaining spring in the lower left end face of locking piston.

Preferably, each roller shaft extends to the front and the rear of the trailer, and front and rear ends of each roller shaft are fixedly connected with front and rear symmetrical wheels respectively.

Preferably, the left end face of the left fixing plate is fixedly connected with buffer springs which are distributed in an up-and-down uniform array mode, and the left ends of the buffer springs are fixedly connected to the left wall of the buffer cavity.

Preferably, the lower side of the left end face of the trailer is fixedly connected with a fixing block, and the left end face of the fixing block is fixedly connected with a hook.

Preferably, be equipped with the opening recess that array distributes about and right in the fixed plate of a left side respectively, it is equipped with each to run through about in the fixed slot the just right fixed slot of recess, it passes to be equipped with in the recess the reinforcing bar of recess.

The invention has the beneficial effects that: the brake device pushes the piston to push the stop piece to brake and decelerate the roller by the inertia of the steel bar, simultaneously converts the great inertia kinetic energy of the steel bar into the rotation kinetic energy of the driving gear, puts down the brake wheel by the movement of the bottom plate, and transmits the kinetic energy of the driving gear to the brake wheel, so that the brake wheel decelerates the trailer again, the steel bar is buffered, the inertia of the steel bar is used for braking and decelerating, and the danger caused by the inertia of the steel bar in the emergency braking process is greatly reduced.

Drawings

For ease of illustration, the invention is described in detail by the following specific examples and figures.

Fig. 1 is a schematic structural diagram of a steel bar trailer with an impact buffering function according to the present invention;

FIG. 2 is a schematic view of the structure in the direction "A-A" of FIG. 1;

FIG. 3 is a schematic view of the structure in the direction "B-B" of FIG. 2;

FIG. 4 is a schematic view of the structure in the direction "C-C" of FIG. 2;

FIG. 5 is a schematic view of the structure in the direction "D-D" of FIG. 2;

fig. 6 is an enlarged view of the structure of "E" in fig. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-6, for ease of description, the orientations described below will now be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The invention relates to a steel bar trailer with an impact buffering function, which comprises a trailer 11, wherein a carriage groove 65 with an upward opening is arranged in the trailer 11, a guide rod 64 is fixedly arranged between the left wall and the right wall of the carriage groove 65, a left fixing plate 18 is arranged on the lower wall surface of the left side of the carriage groove 65, a right fixing plate 63 with a right end surface abutting against the right wall of the carriage groove 65 is arranged on the lower wall surface of the right side of the carriage groove 65, a bottom plate 66 is fixedly connected between the left fixing plate 18 and the right fixing plate 63, the guide rod 64 penetrates through the right fixing plate 63, the bottom plate 66 and the left fixing plate 18, a buffering cavity 16 is arranged on the upper side of the carriage groove 65 at the left side of the left fixing plate 18, three piston cavities 13 which are uniformly distributed up and down in an array are arranged in the left wall of the buffering cavity 16, and piston rods 15 which are respectively, the left end of the piston rod 15 extends into the piston cavity 13, the left end of the piston rod 15 is fixedly connected with a piston 14 the right end of which is propped against the right wall of the piston cavity 13, high-pressure gas is arranged in the piston cavity 13, an upper channel 12 is fixedly arranged in the left wall of the piston cavity 13, a power cavity 20 is arranged at the lower side of the piston cavity 13 at the lowest side and on the left side of the left fixing plate 18, the left end surface of the left fixing plate 18 is fixedly connected with a threaded rod 23 extending into the power cavity 20, the outer circular surface at the left end of the threaded rod 23 is provided with threads, a driving gear 21 is rotationally arranged on the left wall surface of the power cavity 20, a threaded groove 22 with a right opening is arranged in the driving gear 21, internal threads are arranged at the right end of the threaded groove 22, the threaded rod 23 is in threaded engagement with the threaded groove 22 to, the thread groove 22 is disengaged from the driving gear 21, the driving gear 21 can continue to rotate, a transmission device 101 is arranged at the lower side of the driving gear 21, a turnover cavity 36 is arranged at the lower side of the bottom plate 66 in the trailer 11 in a penetrating way, a placing cavity 67 with a downward opening is communicated with the left side of the overturning cavity 36, rotating cavities 68 communicated with the placing cavity 67 are symmetrically arranged in the front and the back of the overturning cavity 36, a rack 39 is fixedly arranged in the bottom plate 66 at the right upper side of the turnover cavity 36, turnover teeth 37 are rotatably arranged between the front wall and the rear wall of the turnover cavity 36 at the upper side of the turnover cavity 36, the rack 39 can be engaged on the upper side of the turnover cavity 36 to drive the turnover teeth 37 to rotate, the left lower end of the turning tooth 37 is fixedly connected with a turning rod 35, the left lower end of the turning rod 35 is rotatably connected with a brake rod 34, the brake wheel 33 with a large surface friction coefficient is fixedly connected with the outer circular surface of the brake rod 34.

Advantageously, the transmission device 101 comprises a driven gear 26 rotatably connected to the right wall of the power cavity 20 and engaged with the lower end of the driving gear 21, a reversing engagement cavity 29 is formed in the right lower wall of the power cavity 20, a driving bevel gear 27 fixedly connected to the driven gear 26 is rotatably connected to the left wall of the reversing engagement cavity 29, a first transmission cavity 47 is formed in the rear wall of the reversing engagement cavity 29, a rotating shaft 46 is rotatably connected between the rear wall of the reversing engagement cavity 29 and the front wall of the first transmission cavity 47, a driven bevel gear 28 fixedly connected to the front end of the rotating shaft 46 and engaged with the driving bevel gear 27 is formed in the reversing engagement cavity 29, a transmission gear 49 fixedly connected to the rear end of the first transmission cavity 47 is rotatably arranged in the rear wall of the first transmission cavity 47, and a rotating gear 57 rotatably connected to the rear wall of the first transmission cavity 47 is engaged at the lower end of the transmission gear 49, it rotates chamber 68 to rotate gear 57 front side fixedly connected with, it rotates connect in to rotate chamber 68 front end fixedly connected with the driving pulley 48 of first transmission chamber 47 antetheca, first transmission chamber 47 right side and rear side it is equipped with second transmission chamber 60 to rotate chamber 68 rear side, first transmission chamber 47 with the intercommunication is equipped with intercommunication chamber 58 between the second transmission chamber 60, it is equipped with to run through to rotate between 36 front and rear walls in upset chamber the synchronous rotating shaft 38 in upset tooth 37 axle center, synchronous rotating shaft 38 both ends extend to around in the rotation chamber 68 and fixedly connected with synchronous pulley 54 respectively, place intracavity 67 around the rotation chamber 68 left side be equipped with fixed connection respectively in the brake pulley 56 of the outer disc of brake lever 34, around brake pulley 56 with around the synchronous pulley 54 respectively around being equipped with brake belt 55, synchronous rotating shaft 38 rear end extend to in the second transmission chamber 60 and fixedly connected with rotate connect in the second transmission chamber 60 The rear wall of the second transmission cavity 60 is provided with a first belt wheel 61 in a rotating manner, a short belt 59 is wound between the second belt wheel 53 and the first belt wheel 61, the front side of the first belt wheel 61 is fixedly connected with a driven belt wheel 52 which is rotatably connected to the front wall of the second transmission cavity 60, and a power belt 50 is wound between the driven belt wheel 52 and the driving belt wheel 48.

Advantageously, three roller cavities 30 with downward openings are arranged on the lower side of the carriage groove 65, a first roller cavity 30 is located on the left side of the placing cavity 67, a second third roller cavity 30 is located on the right side of the overturning cavity 36, a roller shaft 31 is rotatably connected between the front wall and the rear wall of each roller cavity 30, and a roller 51 is fixedly connected to the outer circumferential surface of each roller shaft 31 in each roller cavity 30.

Advantageously, a stop cavity 44 is fixedly arranged in the upper right side of each roller cavity 30, a lower channel 45 is arranged in the stop cavity 44 in a communication manner, the lower channel 45 is communicated with the upper channel 12, a stop rod 41 extending into the roller cavity 30 is slidably arranged on the lower left wall of the stop cavity 44, a stop piston 43 is fixedly connected to the upper right end of the stop rod 41, a stop piece 40 conforming to the shape of the roller 51 is fixedly connected to the lower left end of the stop rod 41, a stop spring 42 surrounding the outer circumferential surface of the stop rod 41 is fixedly connected to the lower left end of the stop piston 43 is fixedly connected to the lower left wall of the stop cavity 44 in the stop cavity 44, and the upper right end of the stop spring 42 is fixedly connected to the lower left end surface of the stop.

Advantageously, each roller shaft 31 extends to the front and the rear of the trailer 11, and front and rear symmetrical wheels 32 are fixedly connected to the front and the rear ends of each roller shaft 31 respectively.

Advantageously, the left end face of the left fixing plate 18 is fixedly connected with buffer springs 17 distributed in an up-and-down uniform array, and the left ends of the buffer springs 17 are fixedly connected with the left wall of the buffer cavity 16.

Advantageously, a fixing block 24 is fixedly connected to the lower side of the left end face of the trailer 11, and a hook 25 is fixedly connected to the left end face of the fixing block 24.

Advantageously, the left fixing plate 18 is internally provided with grooves 62 which are opened to the right and distributed in an up-and-down array, the fixing grooves 69 are internally provided with fixing grooves 69 which are right-and-left penetrated and are opposite to the grooves 62, and reinforcing steel bars 19 which penetrate through the grooves 62 are arranged in the grooves 62.

The following will describe in detail the use steps of a reinforced trailer with a crash cushion function with reference to fig. 1 to 6: in the initial state, the right end surface of the piston 14 abuts against the right wall of the piston cavity 13, the right end surface of the right fixing plate 63 abuts against the right wall of the carriage groove 65, the stop piston 43 is located at the upper limit position, the stop piece 40 is not in contact with the roller 51, and the brake wheel 33 is located in the placing cavity 67.

When the truck emergency brake occurs, when the tractor is in emergency brake, because the steel bar 19 has excessive inertia, the steel bar 19 drives the left fixing plate 18, the bottom plate 66 and the right fixing plate 63 to slide leftwards through the guide rod 64, the buffer spring 17 is compressed, the buffer spring 17 slows down the overall sliding speed to a certain extent, the left fixing plate 18 pushes the piston rod 15 to move leftwards, the piston rod 15 pushes the piston 14 to move leftwards, the piston 14 compresses the gas in the piston cavity 13, so that the stop piston 43 in the stop cavity 44 is pushed leftwards and downwards through the upper channel 12 and the lower channel 45, the stop spring 42 is compressed, the stop piston 43 drives the stop rod 41 to push rightwards and downwards, the stop rod 41 drives the stop piece 40 to tightly abut against the outer circumferential surface of the roller 51, friction is generated between the stop rod 41 and the roller 51 to reduce the speed of the rotating roller 51, and then the rotating speed of the wheel, meanwhile, the left fixing plate 18 pushes the threaded rod 23 to move leftwards, the threaded rod 23 drives the driving gear 21 to rotate at a high speed through thread engagement, inertial kinetic energy is converted into kinetic energy of rotation of the driving gear 21, when the left end face of the threaded rod 23 abuts against the left wall face of the thread groove 22, the threaded rod 23 is disengaged from the driving gear 21, the driving gear 21 continues to rotate, the lower end of the driving gear 21 drives the driven gear 26 to rotate through engagement connection, the driven gear 26 drives the driving bevel gear 27 to rotate, the driving bevel gear 27 is engaged to drive the driven bevel gear 28 to rotate, the driven bevel gear 28 drives the transmission gear 49 to rotate through the rotating shaft 46, the transmission gear 49 drives the rotating gear 57 to rotate through engagement connection, the rotating gear 57 drives the driving pulley 48 to rotate through the rotating cavity 68, the driving pulley 48 drives the driven pulley 52 to rotate, the first belt wheel 61 drives the second belt wheel 53 to rotate through the short belt 59, the second belt wheel 53 drives the synchronous belt wheel 54 to rotate through the synchronous rotating shaft 38, the synchronous belt wheel 54 drives the brake belt wheel 56 to rotate through the brake belt 55, the brake belt wheel 56 drives the brake wheel 33 to rotate, the rotating direction of the brake wheel 33 is opposite to that of the wheel 32, meanwhile, when the bottom plate 66 moves leftwards, the rack 39 is meshed to drive the synchronous rotating shaft 38 to rotate anticlockwise, when the rack 39 stops moving, the synchronous rotating shaft 38 just rotates until the turning rod 35 abuts against the right wall of the turning cavity 36, the brake wheel 33 abuts against the ground in a contact mode, and therefore the trailer 11 is buffered and decelerated through the brake wheel 33.

The invention has the beneficial effects that: the brake device pushes the piston to push the stop piece to brake and decelerate the roller by the inertia of the steel bar, simultaneously converts the great inertia kinetic energy of the steel bar into the rotation kinetic energy of the driving gear, puts down the brake wheel by the movement of the bottom plate, and transmits the kinetic energy of the driving gear to the brake wheel, so that the brake wheel decelerates the trailer again, the steel bar is buffered, the inertia of the steel bar is used for braking and decelerating, and the danger caused by the inertia of the steel bar in the emergency braking process is greatly reduced.

In the above manner, a person skilled in the art can make various changes depending on the operation mode within the scope of the present invention.