阅读说明：本技术 一种半挂车辅助制动装置 (Auxiliary braking device of semitrailer ) 是由 易木鑫 叶鸿江 于 2020-12-17 设计创作，主要内容包括：本发明公开了一种半挂车辅助制动装置,包括车架和车厢,所述车厢设置于所述车架顶部,所述车厢为顶部开口的中空结构,所述车厢顶部一侧设置有围护罩,该围护罩下方的所述车厢内部纵向排列有多组安装筒,该安装筒沿所述车厢长度方向延伸,且所述车厢靠近所述围护罩一侧设置有同步板。有益效果在于：本发明通过在半挂车车厢内部靠近驾驶室一侧设置多组支撑货物的缓冲安装筒,在牵引车刹车过程中通过货物前移动作推动缓冲板移动,从而通过多组弹簧实现货物惯性前移的阻挡防护；通过分隔架对货物进行阻挡分隔,降低急刹过程中车厢后部货物向前方惯性移动而对车体甚至驾驶人员造成的伤害,实用性强。(The invention discloses an auxiliary braking device of a semitrailer, which comprises a frame and a carriage, wherein the carriage is arranged at the top of the frame and is of a hollow structure with an opening at the top, one side of the top of the carriage is provided with an enclosure cover, a plurality of groups of mounting cylinders are longitudinally arranged in the carriage below the enclosure cover and extend along the length direction of the carriage, and a synchronizing plate is arranged at one side of the carriage, which is close to the enclosure cover. Has the advantages that: according to the invention, a plurality of groups of buffering mounting cylinders for supporting goods are arranged on one side, close to a cab, in a semi-trailer carriage, so that a buffering plate is pushed to move through forward movement of the goods in the braking process of the tractor, and accordingly, the blocking protection of the inertia forward movement of the goods is realized through a plurality of groups of springs; the goods are blocked and separated through the separating frame, damage to the vehicle body and even a driver caused by forward inertial movement of the goods at the rear part of the carriage in the emergency braking process is reduced, and the practicability is high.)

1. The utility model provides a semitrailer auxiliary brake device which characterized in that: the automobile chassis is characterized by comprising a frame (1) and a carriage (2), wherein the carriage (2) is arranged at the top of the frame (1), the carriage (2) is of a hollow structure with an opening at the top, a surrounding shield (3) is arranged on one side of the top of the carriage (2), a plurality of groups of mounting cylinders (301) are longitudinally arranged in the carriage (2) below the surrounding shield (3), the mounting cylinders (301) extend along the length direction of the carriage (2), a synchronizing plate (4) is arranged on one side, close to the surrounding shield (3), of the carriage (2), and the outer end parts of the plurality of groups of mounting cylinders (301) extend out of the carriage (2) and are fixed on the inner side of the synchronizing plate (4);

multiunit all be provided with spring (301a) in installation section of thick bamboo (301), just installation section of thick bamboo (301) is inside to be kept away from synchronous board (4) one side is provided with sliding tray (302), and this sliding tray (302) are kept away from spring (301a) one side middle part transversely is provided with connecting rod (303), and multiunit connecting rod (303) stretch out installation section of thick bamboo (301) one end longitudinal connection has buffer board (304), the side around buffer board (304) carriage (2) inner wall symmetry is provided with two sets of anticreep groove, buffer board (304) both ends respectively with two sets of anticreep groove sliding fit.

2. The auxiliary braking device for the semitrailer according to claim 1, characterized in that: keep away from frame (1) bottom enclose guard shield (3) one side front and back symmetry and be provided with two sets of semi-ring shape wheel arch (101), and two sets of between wheel arch (101) frame (1) bottom vertically is provided with bearing beam (103), enclose guard shield (3) below frame (1) bottom is provided with and lifts pneumatic cylinder (102).

3. The auxiliary braking device for the semitrailer according to claim 2, characterized in that: the car is characterized in that a plurality of groups of containing grooves (201) are symmetrically arranged on the front side and the rear side inside the car (2), the containing grooves (201) are uniformly arranged along the length direction of the car (2), a plurality of groups of separating frames (202) are transversely arranged inside the car (2), and the separating frames (202) are of rectangular square frame structures.

4. A semitrailer auxiliary brake apparatus as claimed in claim 3, wherein: the vertical many railings (202a) that are provided with in separate frame (202) middle part, this railing (202a) both ends vertically extend to separate the inside front and back side of frame (202), separate frame (202) outside front and back side all block into carriage (2) inside in storage tank (201), just separate frame (202) height and be greater than carriage (2) border height.

5. The auxiliary braking device for the semitrailer according to claim 4, characterized in that: the synchronous plate (4) is far away from one side of the carriage (2) and is longitudinally provided with a plurality of groups of guide pipes (5), the guide pipes (5) are in one-to-one correspondence with the installation cylinders (301), the guide pipes (5) longitudinally penetrate through the synchronous plate (4) and are communicated with the installation cylinders (301), and the surfaces of the synchronous plate (4) below the guide pipes (5) are longitudinally provided with gas collecting hoods (6).

6. The auxiliary braking device for the semitrailer according to claim 5, characterized in that: two sets of air inlet pipes (7) are symmetrically arranged on the front side and the rear side of the gas collecting hood (6), the air inlet pipes (7) are communicated with the plurality of groups of guide pipes (5) through the gas collecting hood (6), one ends of the air inlet pipes (7) far away from the gas collecting hood (6) extend to the bottom of the frame (1), and control valves (701) are arranged in the middle of the air inlet pipes (7).

7. The auxiliary braking device for the semitrailer according to claim 6, characterized in that: two groups of brake assemblies (8) are symmetrically arranged at the bottom of the frame (1) below the two groups of wheel arches (101), a wheel shaft (9) is longitudinally connected between the two groups of brake assemblies (8), a synchronizing rod (901) is arranged below the wheel shaft (9) in parallel, two auxiliary plates (902) are symmetrically arranged at two ends of the synchronizing rod (901), and two groups of positioning beams (903) are symmetrically arranged on opposite sides of the two groups of auxiliary plates (902) above the wheel shaft (9).

8. The auxiliary brake device for the semitrailer of claim 7, wherein: bearing beam (103) both ends all downwardly extending, just bearing beam (103) both ends respectively with two sets of locating beam (903) top welded fastening, two intake pipe (7) extend to frame (1) bottom one end all is provided with brake wheel cylinder (702), and this brake wheel cylinder (702) are fixed in bearing beam (103) top.

9. The auxiliary braking device for the semitrailer of claim 8, wherein: the brake assembly (8) comprises a brake hub (801) fixed on the outer side of the end of the wheel shaft (9), a plurality of groups of wheel bolts (801a) are arranged on the outer portion of the brake hub (801) in a surrounding mode, two groups of semicircular brake shoe pieces (802) are symmetrically arranged on two sides of the inner portion of the brake hub (801), brake frames (803) are fixed on the inner sides of the brake shoe pieces (802), a fixed shaft (803a) is arranged on the top of each brake frame (803), and the brake frames (803) are in running fit with the auxiliary plate (902) through the fixed shaft (803 a).

10. The auxiliary brake device for the semitrailer of claim 9, wherein: two groups of movable shafts (803b) are symmetrically arranged at the bottoms of the two groups of brake frames (803), the movable shafts (803b) are in running fit with the brake frames (803), the synchronous rod (901) penetrates through the auxiliary plate (902) and extends between two groups of movable shafts (803b), an oval control block (901a) is arranged at the end part of the synchronous rod (901), the movable shaft (803b) is abutted against the outer side of the control block (901a), a transmission seat (703) is arranged at the telescopic end of the bottom of the brake cylinder (702), a waist-shaped sliding groove (703a) is arranged at the bottom of the transmission seat (703), a cam arm (904) is arranged outside the synchronous rod (901), the cam arm (904) extends to the bottom of the transmission seat (703), the top of the cam arm (904) is rotatably provided with a hinge shaft (904a), and the hinge shaft (904a) is rotatably matched with the sliding groove (703 a).

Technical Field

The invention relates to the field of semitrailer structures, in particular to an auxiliary braking device of a semitrailer.

Background

A semitrailer is a trailer whose axle is positioned behind the center of gravity of the vehicle (when the vehicle is evenly loaded) and which is equipped with a coupling device that transmits horizontal and vertical forces to the tractor. Compared with a single automobile, the semitrailer can improve the comprehensive economic benefit of road transportation. The transportation efficiency can be improved by 30-50%, the cost is reduced by 30-40%, and the oil consumption is reduced by 20-30%. More importantly, the semitrailer can also play a role in promoting the organization form of logistics in China, so that the semitrailer has important significance in the transportation process, wherein a braking device of the semitrailer is an important part for ensuring the driving safety of the rear trailer.

The applicant finds that at least the following technical problems exist in the prior art: the existing semitrailer is braked by air pressure of an air pump, after a brake pedal is stepped on, the air pump compresses air and guides the air to be led into a brake air chamber, a brake adjusting arm is pushed by the air to realize service braking, and the air pump is inflated for a certain time in the braking process, so that the braking reaction is slow, and the braking distance is long; meanwhile, goods in the carriage of the trailer emergency brake process move forward under the action of inertia and impact the cab, so that potential safety hazards exist for drivers and vehicles, and the practicability is poor.

Disclosure of Invention

The invention aims to solve the problems and provide the auxiliary braking device of the semitrailer, wherein a plurality of groups of buffering mounting cylinders for supporting goods are arranged on one side, close to a cab, in a compartment of the semitrailer, and the buffering mounting cylinders push a buffering plate to move through the forward movement of the goods in the braking process of the tractor, so that the blocking protection of the inertia forward movement of the goods is realized through a plurality of groups of springs; the sliding disc is pushed by the buffer plate to introduce air into the guide pipe, the air discharged by the mounting cylinder is synchronously introduced into the brake cylinder through the air inlet pipe, so that the inertial movement process of goods in the semitrailer is buffered and protected, and the braking process of a brake hub of the semitrailer is realized through the inertial movement of the goods; set up multiunit spacer frame along its length direction in the inside both sides in carriage, set up multiunit spacer frame according to placing the region with bearing the weight of the goods in the carriage to block the separation to the goods through the spacer frame, reduce emergency brake in-process carriage rear portion goods and remove and to the automobile body injury that navigating mate caused to the place ahead inertia, the practicality is strong, sees the explanation below in detail.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides an auxiliary braking device for a semitrailer, which comprises a frame and a carriage, wherein the carriage is arranged at the top of the frame and is of a hollow structure with an opening at the top, one side of the top of the carriage is provided with an enclosure cover, a plurality of groups of mounting cylinders are longitudinally arranged in the carriage below the enclosure cover and extend along the length direction of the carriage, a synchronizing plate is arranged at one side of the carriage close to the enclosure cover, and the outer side end parts of the plurality of groups of mounting cylinders extend out of the carriage and are fixed on the inner side of the synchronizing plate;

the multiunit all be provided with the spring in the installation section of thick bamboo, just inside keeping away from of installation section of thick bamboo synchronous board one side is provided with the sliding tray, and this sliding tray is kept away from spring one side middle part transversely is provided with the connecting rod, and the multiunit the connecting rod stretches out installation section of thick bamboo one end longitudinal connection has the buffer board, the side around the buffer board the carriage inner wall symmetry is provided with two sets of anticreep grooves, the buffer board both ends respectively with two sets of anticreep groove sliding fit.

By adopting the auxiliary braking device for the semitrailer, in the use process, when a tractor at the front part of the semitrailer is braked suddenly, the semitrailer is subjected to braking and decelerating action as a whole, goods loaded in a carriage move continuously in the driving direction under the action of inertia, the goods push the buffer plate to push the connecting rod to push and compress the spring in the mounting cylinder, the inertia forward movement action of the goods is blocked and buffered through the compression process of the spring, meanwhile, the air in the mounting cylinder is discharged into the air collecting hood along the guide pipe by the sliding disc in the mounting cylinder and is discharged into the air inlet pipe along the air collecting hood, the air inlet pipe guides the air into the brake sub-pump and pushes the telescopic rod to extend downwards, the transmission seat at the bottom end of the telescopic rod drives the synchronous rod to rotate on the auxiliary plate, so that the two groups of control blocks at the two ends of the telescopic rod push the braking frames to rotate outwards around the fixed, the brake shoe is driven by the brake frame to rotate outwards to a position close to the brake hub, so that the brake hub is tightly contacted through friction of the brake shoe to perform speed reduction braking, and the auxiliary braking process of the semitrailer behind the tractor is realized.

Preferably, two groups of semi-annular wheel arches are symmetrically arranged at the front and back of one side of the bottom of the frame, which is far away from the enclosure, a bearing beam is longitudinally arranged at the bottom of the frame between the two groups of wheel arches, and a lifting hydraulic cylinder is arranged at the bottom of the frame below the enclosure.

Preferably, a plurality of groups of accommodating grooves are symmetrically arranged on the front side and the rear side in the carriage, the plurality of groups of accommodating grooves are uniformly arranged along the length direction of the carriage, a plurality of groups of partition frames are transversely arranged in the carriage, and the partition frames are in a rectangular square frame structure.

Preferably, the middle of the separation frame is vertically provided with a plurality of railings, two ends of each railing longitudinally extend to the front side and the rear side inside the separation frame, the front side and the rear side outside the separation frame are clamped into the containing grooves inside the carriage, and the height of the separation frame is greater than the height of the edge of the carriage.

Preferably, a plurality of groups of guide pipes are longitudinally arranged on one side of the synchronizing plate, which is far away from the carriage, the guide pipes are in one-to-one correspondence with the mounting cylinders, the guide pipes longitudinally penetrate through the synchronizing plate and are communicated with the mounting cylinders, and gas collecting hoods are longitudinally arranged on the surface of the synchronizing plate below the plurality of groups of guide pipes.

Preferably, two groups of air inlet pipes are symmetrically arranged on the front side and the rear side of the gas collecting hood, the air inlet pipes are communicated with the plurality of groups of guide pipes through the gas collecting hood, one end, far away from the gas collecting hood, of each air inlet pipe extends to the bottom of the frame, and a control valve is arranged in the middle of each air inlet pipe.

Preferably, two groups of brake assemblies are symmetrically arranged at the bottom of the frame below the two groups of wheel arches, a wheel shaft is longitudinally connected between the two groups of brake assemblies, a synchronizing rod is arranged below the wheel shaft in parallel, two groups of auxiliary plates are symmetrically arranged at two ends of the synchronizing rod, and two groups of positioning beams are symmetrically arranged on opposite sides of the two groups of auxiliary plates above the wheel shaft.

Preferably, both ends of the bearing beam extend downwards, the two ends of the bearing beam are respectively welded and fixed with the tops of the two positioning beams, the two air inlet pipes extend to one end of the bottom of the frame and are provided with brake cylinders, and the brake cylinders are fixed at the tops of the bearing beams.

Preferably, the brake assembly comprises a brake hub fixed on the outer side of the end portion of the wheel shaft, a plurality of groups of wheel bolts are arranged on the outer portion of the brake hub in a surrounding mode, two groups of semicircular brake shoe pieces are symmetrically arranged on two sides of the inner portion of the brake hub, brake frames are fixed on the inner sides of the two groups of brake shoe pieces, fixed shafts are arranged on the tops of the two groups of brake frames, and the brake frames are in running fit with the auxiliary plate through the fixed shafts.

Preferably, two groups of movable shafts are symmetrically arranged at the bottoms of the two groups of brake frames, the movable shafts are in running fit with the brake frames, the synchronizing rod penetrates through the auxiliary plate and extends between the two groups of movable shafts, an oval control block is arranged at the end part of the synchronizing rod, the movable shafts are tightly abutted to the outer sides of the control blocks, a transmission seat is arranged at the telescopic end of the bottom of the wheel cylinder, a waist-shaped sliding groove is formed in the bottom of the transmission seat, a cam arm is arranged outside the synchronizing rod and extends to the bottom of the transmission seat, a hinged shaft is rotatably arranged at the top of the cam arm, and the hinged shaft is in running fit with the sliding groove.

Has the advantages that: according to the invention, a plurality of groups of buffering mounting cylinders for supporting goods are arranged on one side, close to a cab, in a semi-trailer carriage, so that a buffering plate is pushed to move through forward movement of the goods in the braking process of the tractor, and accordingly, the blocking protection of the inertia forward movement of the goods is realized through a plurality of groups of springs; the sliding disc is pushed by the buffer plate to introduce air into the guide pipe, the air discharged by the mounting cylinder is synchronously introduced into the brake cylinder through the air inlet pipe, so that the inertial movement process of goods in the semitrailer is buffered and protected, and the braking process of a brake hub of the semitrailer is realized through the inertial movement of the goods; set up multiunit spacer frame along its length direction in the inside both sides in carriage, set up multiunit spacer frame according to placing the region with bearing the weight of the goods in the carriage to block the separation to the goods through the spacer frame, reduce emergency brake in-process carriage rear portion goods and remove and to the automobile body injury that navigating mate caused to the place ahead inertia, the practicality is strong.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

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

FIG. 2 is a top view of the internal structure of the enclosure of the present invention;

FIG. 3 is a schematic perspective view of the present invention;

FIG. 4 is a schematic perspective view of the brake assembly of the present invention;

FIG. 5 is an enlarged view of the structure of FIG. 4 at A;

FIG. 6 is a perspective view of the axle of the present invention;

fig. 7 is an enlarged view of the structure at B of fig. 6.

The reference numerals are explained below:

1. a frame; 101. a wheel arch; 102. a lifting hydraulic cylinder; 103. a pressure bearing beam; 2. a carriage; 201. a containing groove; 202. a spacer; 202a, a railing; 3. a surrounding shield; 301. mounting the cylinder; 301a, a spring; 302. a slide plate; 303. a connecting rod; 304. a buffer plate; 4. a synchronization board; 5. a conduit; 6. a gas-collecting hood; 7. an air inlet pipe; 701. a control valve; 702. a brake cylinder; 702a, a telescopic rod; 703. a transmission seat; 703a, a chute; 8. a brake assembly; 801. a brake hub; 801a, wheel bolts; 802. a brake shoe; 803. a brake frame; 803a, a fixed shaft; 803b, a movable shaft; 9. a wheel axle; 901. a synchronization lever; 901a, a control block; 902. an auxiliary plate; 903. positioning the beam; 904. a cam arm; 904a, a hinge axis.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Referring to fig. 1-7, the invention provides a semitrailer auxiliary brake device, which comprises a frame 1 and a carriage 2, wherein the carriage 2 is arranged at the top of the frame 1, the carriage 2 is of a hollow structure with an open top, one side of the top of the carriage 2 is provided with an enclosure 3, the enclosure 3 is used for blocking and protecting one side of the carriage 2 close to a tractor so as to avoid damage to a vehicle body caused by movement of goods in the carriage 2 to one side of the tractor due to inertia in an emergency braking process, a plurality of groups of mounting cylinders 301 are longitudinally arranged in the carriage 2 below the enclosure 3, the mounting cylinders 301 extend along the length direction of the carriage 2, one side of the carriage 2 close to the enclosure 3 is provided with a synchronizing plate 4, and the outer side ends of the plurality of groups of mounting cylinders 301 extend out of;

all be provided with spring 301a in the multiunit installation section of thick bamboo 301, and installation section of thick bamboo 301 is inside to be kept away from synchronous board 4 one side and be provided with sliding tray 302, sliding tray 302 and installation section of thick bamboo 301 sliding fit, this sliding tray 302 is kept away from spring 301a one side middle part and transversely is provided with connecting rod 303, and multiunit connecting rod 303 stretches out installation section of thick bamboo 301 one end longitudinal connection and is had buffer board 304, 2 inner wall symmetries in carriage of buffer board 304 front and back side are provided with two sets of anticreep grooves, buffer board 304 both ends respectively with two sets of anticreep groove sliding fit, with the action of transversely sliding through anticreep groove.

As an optional implementation manner, two groups of semi-annular wheel arches 101 are symmetrically arranged in front and back of one side of the bottom of the frame 1, which is far away from the enclosure 3, a pressure-bearing beam 103 is longitudinally arranged at the bottom of the frame 1 between the two groups of wheel arches 101, a lifting hydraulic cylinder 102 is arranged at the bottom of the frame 1 below the enclosure 3, and the lifting hydraulic cylinder 102 is used for supporting the semitrailer when the semitrailer is not connected with a tractor;

the front side and the rear side of the interior of the carriage 2 are symmetrically provided with a plurality of groups of containing grooves 201, the plurality of groups of containing grooves 201 are uniformly arranged along the length direction of the carriage 2, the interior of the carriage 2 is transversely provided with a plurality of groups of partition frames 202, the partition frames 202 are of a rectangular square frame structure, the middle parts of the partition frames 202 are vertically provided with a plurality of railings 202a, two ends of each railing 202a longitudinally extend to the front side and the rear side of the interior of the partition frame 202, the front side and the rear side of the exterior of each partition frame 202 are clamped in the containing grooves 201 of the interior of the carriage 2, the height of each partition frame 202 is greater than the edge height of the carriage 2, and the partition frames 202 can be used for blocking;

a plurality of groups of guide pipes 5 are longitudinally arranged on one side of the synchronizing plate 4, which is far away from the carriage 2, the guide pipes 5 correspond to the mounting cylinder 301 one by one, the guide pipes 5 longitudinally penetrate through the synchronizing plate 4 and are communicated with the mounting cylinder 301, a gas collecting hood 6 is longitudinally arranged on the surface of the synchronizing plate 4 below the plurality of groups of guide pipes 5, two groups of gas inlet pipes 7 are symmetrically arranged on the front side and the rear side of the gas collecting hood 6, the gas inlet pipes 7 are communicated with the plurality of groups of guide pipes 5 through the gas collecting hood 6, one ends, far away from the gas collecting hood 6, of the gas inlet pipes 7 extend to the bottom of the frame 1, a control valve 701 is arranged in the middle of the gas inlet pipes;

two groups of brake assemblies 8 are symmetrically arranged at the bottom of the frame 1 below the two groups of wheel arches 101, a wheel shaft 9 is longitudinally connected between the two groups of brake assemblies 8, a synchronous rod 901 is arranged below the wheel shaft 9 in parallel, two groups of auxiliary plates 902 are symmetrically arranged at two ends of the synchronous rod 901, two groups of positioning beams 903 are symmetrically arranged at opposite sides of the two groups of auxiliary plates 902 above the wheel shaft 9, two ends of a bearing beam 103 extend downwards, two ends of the bearing beam 103 are respectively welded and fixed with the tops of the two groups of positioning beams 903, a brake sub-pump 702 is arranged at one end of each air inlet pipe 7 extending to the bottom of the frame 1, and the brake sub-pump 702;

the brake assembly 8 comprises a brake hub 801 fixed on the outer side of the end portion of the wheel axle 9, a plurality of sets of wheel bolts 801a are arranged around the outer side of the brake hub 801 so as to fix the hub of the semitrailer on the outer side of the brake hub 801 through the wheel bolts 801a, two sets of semicircular brake shoes 802 are symmetrically arranged on two sides of the inner side of the brake hub 801, brake frames 803 are fixed on the inner sides of the two sets of brake shoes 802, fixed shafts 803 are arranged on the tops of the two sets of brake frames 803, fixed shafts 803a are arranged on the tops of the two sets of brake frames 803, the brake frames 803 are rotatably matched with an auxiliary plate 902 through the fixed shafts 803a, two sets of movable shafts 803b are symmetrically arranged on the bottoms of the two sets of brake frames 803, the movable shafts 803b are rotatably matched with the brake frames 803, a synchronizing rod 901 penetrates through the auxiliary plate 902 and extends between the two sets of movable shafts 803b, an oval control block 901a is arranged, a waist-shaped sliding groove 703a is arranged at the bottom of the transmission seat 703, a cam arm 904 is arranged outside the synchronous rod 901, the cam arm 904 extends to the bottom of the transmission seat 703, a hinge shaft 904a is rotatably arranged at the top of the cam arm 904, and the hinge shaft 904a is rotatably matched with the sliding groove 703 a.

By adopting the structure, in the using process, when the tractor in the front part of the semitrailer brakes suddenly, the semitrailer is subjected to braking and decelerating action as a whole, goods loaded in the carriage 2 continuously move towards the driving direction under the action of inertia, the goods push the buffer plate 304 to push the connecting rod 303 to push and compress the spring 301a in the mounting cylinder 301, the inertia forward movement action of the goods is blocked and buffered through the compression process of the spring 301a, meanwhile, the air in the mounting cylinder 301 is discharged into the air collecting hood 6 along the guide pipe 5 by the sliding disc 302 in the mounting cylinder 301 and is discharged into the air inlet pipe 7 along the air collecting hood 6, the air inlet pipe 7 guides the air into the brake cylinder 702 and pushes the telescopic rod 702a to extend downwards, the transmission seat 703 at the bottom end of the telescopic rod 702a drives the synchronous rod 703 to rotate on the auxiliary plate 902, so that the two control blocks 901a at the two ends of the telescopic rod 702a push the brake frame 803 to rotate outwards around, the brake shoe 802 is driven by the brake frame 803 to rotate outwards to a position close to the brake hub 801, so that the brake hub 801 is tightly rubbed by the brake shoe 802 for deceleration braking, and an auxiliary braking process of the semitrailer behind the tractor is realized;

a plurality of groups of buffering mounting barrels 301 for supporting goods are arranged on one side, close to a cab, in the semi-trailer carriage 2, so that the buffering plates 304 are pushed to move through forward movement of the goods in the braking process of the tractor, and accordingly blocking protection of inertial forward movement of the goods is achieved through a plurality of groups of springs 301 a; the sliding disc 302 is pushed by the buffer plate 304 to guide air into the guide pipe 5, the air exhausted from the mounting cylinder 301 is synchronously guided into the brake cylinder 702 through the air inlet pipe 7, so that the inertial moving process of goods in the semitrailer is buffered and protected, and meanwhile, the braking process of the brake hub 801 of the semitrailer is realized through the inertial moving of the goods; set up multiunit spacer 202 along its length direction in 2 inside both sides in carriage, set up multiunit spacer 202 according to placing the region with bearing the weight of goods in 2 in the carriage to block the separation to the goods through spacer 202, reduce emergency braking in-process 2 rear portion goods and preceding inertial movement and to the automobile body injury that navigating mate caused even, the practicality is strong.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.