CN112208495A

CN112208495A - Zero-displacement safe emergency braking inertia unloading device for high-speed running of automobile

Info

Publication number: CN112208495A
Application number: CN202011051266.0A
Authority: CN
Inventors: 陆吉祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-01-12
Anticipated expiration: 2040-09-29
Also published as: CN112208495B

Abstract

The invention relates to the field of automobile braking, in particular to an inertia unloader for zero-displacement safe emergency braking during high-speed running of an automobile. Comprises a frame, a transmission component, a brake component and an unloading component. The front end and the rear end of the left panel and the right panel of the frame are fixedly provided with a male dovetail which is in dynamic fit with a female dovetail fixedly arranged on a linkage rod for guiding, and the middle position of the rear end of the frame and the front end and the rear end of the inner surface of the left panel and the rear panel of the frame are fixedly provided with a transmission assembly; braking components are fixedly arranged at two ends of the frame, and unloading components are fixedly arranged on the inner surfaces of the left and right panels of the frame between the braking components. The transmission assembly is meshed with the rack and the gear of the brake assembly, and the unloading assembly is used for unloading through a hydraulic cylinder, a movable pulley, a fixed pulley, a steel wire rope and a pressure spring combined structure. The transmission assembly drives the brake assembly to rotate, so that the support legs are directly contacted with the road surface and support a braked vehicle, and the wheels of the braked vehicle lose driving force to realize emergency braking; the emergency braking is realized by unloading the braking inertia force of the unloading assembly.

Description

Zero-displacement safe emergency braking inertia unloading device for high-speed running of automobile

Technical Field

The invention relates to the field of automobile braking, in particular to an inertia unloader for zero-displacement safe emergency braking during high-speed running of an automobile.

Background

Braking of an automobile is accomplished by the relative friction of the tires with the road surface creating frictional resistance. Therefore, the braking capability of the automobile is limited, the braking time is long, especially when the automobile running at high speed meets an emergency and needs zero-displacement emergency braking relative to the road surface, the existing braking system can not be used, and the automobile is damaged slightly and is damaged seriously, and people are killed. Therefore, people urgently need to use the zero-displacement safe emergency braking inertia unloading device for high-speed running of the automobile to realize zero-displacement emergency braking of the automobile relative to the road surface when the automobile runs at high speed and meets an emergency. The safety of life and property when the vehicle runs at high speed and meets an emergency is guaranteed, and the driving safety is improved.

Disclosure of Invention

In order to achieve the purpose, the invention is realized according to the equivalent replacement theory and technical scheme of the system. The equivalent alternative mode and the structural principle of the invention are illustrated below by taking a 'zero-displacement safety emergency braking inertial unloader for high-speed running of a family car' as an example: designing parameters: the car has a full load mass of 4500 kg, a speed per hour of 300 km, a braking time of 2 s and a braking displacement of zero relative to the road surface. Environmental conditions: it is suitable for cement, asphalt and both ice and snow high-speed road surface, and is all-weather at plus or minus 50 deg. The unloader component is made of materials and manufactured by a process which meets the ROHS requirement, the external dimension of the unloader component is matched with that of the existing automobile, and the unloader component has the weight of about 200 kilograms.

The invention relates to an inertia unloader for zero-displacement safe emergency braking during high-speed running of an automobile, which comprises a rack, a transmission assembly, a braking assembly and an unloading assembly and is characterized in that the transmission assembly is fixedly arranged at the middle position of the rear end of the rack and at the front and back of the inner surfaces of a left panel and a right panel, the braking assembly is fixedly arranged at two ends of the rack, the unloading assembly is fixedly arranged on the inner surfaces of the left panel and the right panel of the rack between the braking assemblies, and the transmission assembly and the braking assembly are connected in a meshing manner through a rack and a gear.

The frame include: the linkage rod, female forked tail, male forked tail, left panel, axle, right panel, shaft shoulder, driving plate, bearing plate and stopper.

The transmission assembly comprises a miniature air compressor and a translation part, wherein the miniature air compressor comprises an air pipe, a two-position three-way electromagnetic valve and a five-way pipe joint. The translation piece comprises a cylinder barrel, a pressure spring, a piston rod, a rack and a guide plate.

The brake assembly comprises a rotating shaft and a supporting leg. The rotating shaft comprises a gear, and the support legs comprise a brake wheel, a telescopic rod, a guide key, a round screw rod, a pressure spring, a connecting sleeve, a connecting rod and a positioning guide screw rod.

The unloading assembly comprises a hydraulic cylinder, a hydraulic cylinder fixing plate, a dragging plate, a pressure spring, a steel wire rope, a movable pulley fixing plate, a guide shaft, an adjusting screw, a fixed pulley fixing plate, a fixed pulley, a movable pulley, a pulley seat, a locking nut, a tension seat and a positioning guide column. The hydraulic cylinder includes: rear end housing, oil storage pipe, cylinder, piston, hydraulic oil, front end housing, piston rod.

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

the invention drives the brake assembly to rotate through the transmission assembly, so that the support legs are directly in rigid contact with the road surface to support the automobile to be separated from the road surface and lose driving force, the automobile and the unloader instantaneously form an unloading system, and the automobile is subjected to uniform deceleration linear motion under the resistance provided by the unloading assembly in the system to unload the inertia force generated during instantaneous braking; if the automobile is regarded as one system during normal running and regarded as the other system after instantaneous braking, the equivalent replacement of a new system and an old system is realized after instantaneous braking, and the structural requirement that the automobile can be safely and emergently braked relative to the zero displacement of the road surface during high-speed running is met.

Drawings

Embodiments of the invention are described in further detail below with reference to the attached drawing figures, wherein:

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

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic top view of the transmission assembly of the present invention;

FIG. 4 is a front view of a translation member of the transmission assembly of the present invention;

FIG. 5 is a schematic top view of the brake assembly of the present invention;

FIG. 6 is a schematic top view of a foot of the brake assembly of the present invention;

FIG. 7 is a schematic top view of the unloading assembly of the present invention;

FIG. 8 is a schematic top view of the hydraulic cylinder of the unloader assembly of the present invention;

FIG. 9 is a schematic front view of the working principle of the present invention;

fig. 10 is a front view of the present invention assembled with a vehicle.

In the figure: 1. the frame (1) comprises a linkage rod 101; a female dovetail 102; a male dovetail 103; a left panel 104; a shaft 105; a right panel 106; a shoulder 107; a drive plate 108; a support plate 109; a stop block 110. 2. A transmission assembly; the transmission assembly (2) comprises: a miniature air compressor 21 and a translation piece 22. The micro air compressor 21 includes an air pipe 211; a two-position three-way electromagnetic valve 212, a five-way pipe joint 213, an air pipe 214 and an air pipe 215. The translation member 22 includes a cylinder 221, a compression spring 222, a piston rod 223, a rack 224, and a guide plate 225. 3. The brake component (3) comprises a rotating shaft 31 and a supporting leg 32. The rotary shaft 31 includes a gear 311; the leg 32 includes: a brake wheel 321; the telescopic rod 322, the guide key 323, the round screw 324, the pressure spring 325, the coupling sleeve 326, the connecting rod 327 and the positioning guide screw 328. 4. Unloading the assembly; the unloading assembly (4) comprises a hydraulic cylinder 401; a hydraulic cylinder fixing plate 402; a dragging plate 403; a compression spring 404; a wire rope 405; a movable pulley fixing plate 406; an access shaft 4O 7; an adjusting screw 408; a fixed pulley fixing plate 409; a fixed pulley 410; a movable pulley 411; a pulley seat 412; a lock nut 413; a tension seat 414; positioning guide posts 415; the hydraulic cylinder 401 includes: a rear end cap 4011; an oil reservoir tube 4012; a cylinder barrel 4013; a piston 4014; hydraulic oil 4015; a front end cap 4016; a piston rod 4017; 5. automobile bottom beam < in fig. 10 >. The automobile bottom beam comprises a linkage rod 101 and a driving plate 108. < solder Assembly >

Detailed description of the preferred embodiments

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

As shown in figures 1-10, the invention relates to an inertia unloader for zero-displacement safe emergency braking during high-speed running of an automobile, which comprises: a frame 1; a transmission assembly 2; a brake assembly 3; the assembly 4 is unloaded.

The frame 1 is a rectangular frame body and is used for providing an installation foundation to establish an unloading independent system. The frame 1 is formed by connecting a left panel 104 and a right panel 106 through a shaft 105 at two ends by screw threads to form a frame body, a male dovetail 103 is fixedly arranged at two ends of the left panel 104 and the right panel 106, a female dovetail 102 is arranged in a sliding fit manner, and the female dovetail 102 is fixedly connected with a linkage rod 101 by screw threads. The linkage rod 101 is welded with the automobile bottom beam 5. When the automobile is braked and unloaded, the automobile synchronously slides in a male dovetail 103 dovetail on the rack 1 in a limiting way through the bottom beam 5, the linkage rod 101 and the female dovetail 102, and the unloading direction is achieved. The unloading device can be integrally separated from the automobile except that the linkage rod 101 and the transmission plate 108 cannot be disassembled, and is convenient to install and maintain. The inner surface between the left panel 104 and the right panel 106 is symmetrically provided with a transmission component 2 and an unloading component 4 in parallel, and the brake component 3 is movably arranged in the direction vertical to the inner surface. A miniature air compressor 21 is fixedly arranged on a supporting plate 109 at the rear end of the frame 1, and the front end of the supporting plate 109 is in threaded connection with a fixed pulley fixing plate 409. Shoulders 107 are used to over-thread the inner surfaces of left and

right panels

104 and 106 to the unloader assembly 4. The transmission plate 108 is in surface contact with and is not fixed to the surface of a pulley seat 412 fixedly arranged on the movable pulley fixing plate 406, the transmission plate 108 is welded to the automobile bottom beam 5, when the automobile is unloaded, the braking inertia force of the automobile is transmitted to the pulley seat 412 from the transmission plate 108 and then transmitted to the movable pulley fixing plate 406 from the pulley seat 412, and the movable pulley fixing plate 406 pulls the steel wire rope 4O5 to compress the pressure spring 404 to slide forwards on the guide shaft 4O7 through the movable pulley 411; a stopper 110 is fixedly mounted on the outer surfaces of the left and

right panels

104 and 106 to limit the rotation angle of the brake assembly 3. A male dovetail 103 and a female dovetail 102 on the frame 1 are connected with an automobile bottom beam 5 in a sliding manner; this connection enables the unloader to be driven in synchronism with the vehicle.

When the automobile is started, the battery power supply supplies 220V alternating current power to the micro air compressor 21 through the inverter, the compressor 21 compresses air and sends the air into the air storage tank and sends the air into the normally open end of the two-position three-way electromagnetic valve 212 through the air pipe 211, then the compressed air is sent into the cylinder 221 through the air outlet of the two-position three-way electromagnetic valve 212 through the five-way pipe joint 213 and the air pipe 214, the cylinder pressure is 0.7Mpa, the function preparation is completed, and the normal state is kept. When the automobile stops and the pressure in the cylinder 221 is lost, the pressure spring 222 and the indexing radius of the gear 311 on the rotating shaft 31 of the brake assembly 3 generate torque to limit the free rotation of the brake assembly 3, so that the brake assembly 3 is kept at the correct position. The unloader working button is started, the air supply port of the two-position three-way electromagnetic valve 212 is switched to a normally closed end, air is supplied to the cylinder barrel 221 in the translation part 22 through the five-way pipe joint 213 and the air pipe 215, the piston rod 223 pushes the rack 224 to translate backwards, the rack 224 is meshed with the gear 311 on the rotating shaft 31 in the brake component 3, the brake component 3 rotates anticlockwise for 30 degrees, and at the moment, the limiting block 110 works. The transmission component 2 can work forward and backward by switching an air supply port through a two-position three-way electromagnetic valve 212; the transmission assembly 2 functions to provide an operating driving force for the brake assembly 3.

The braking component 3, the rotating shaft 31 is symmetrically and fixedly provided with a gear 311 for transmitting torque, and a supporting leg 32 for establishing and supporting an unloading system; the brake wheel 321 is fixedly arranged on the support leg 32, and the outer circle of the brake wheel 321 is provided with pyramid-shaped teeth which are used for obtaining enough reliable braking force when contacting with the road surface. The brake wheel 321 is fixed on the telescopic rod 322. The rear end of the telescopic rod 322 is in threaded connection with the round screw 324, preventing the telescopic rod 322 from sliding out of the coupling sleeve 326. The other end of the round screw 324 is a round plane for supporting a compression spring 325. The guide key 323 slidably guides the extension rod 322 and limits its free rotation. Guide key 323 guides and limits free rotation of link 327. The positioning guide screw 328 is screwed with the thread of the coupling sleeve 326, and the positioning guide screw 328 preloads, positions and guides the compression spring 325, so that the brake wheel 321, the telescopic rod 322 and the round screw 324 can synchronously compress the compression spring 325 to slide in the coupling sleeve 326 in a reciprocating way through the guide key 323. Therefore, the support legs are in rigid contact with the road surface, flexibly support the unloader, play a role in buffering, and simultaneously play a role in adjusting the unevenness of the road surface and the stress balance of the unloader. The connecting rod 327 and the connecting sleeve 326 are radially fixed by a screw rod < as shown in fig. 6 >. The leg 32 is fixedly connected with the rotating shaft 31 through a connecting rod 327 by a pin uranium. The braking component 3 performs positive and negative bidirectional limiting rotation between the left panel 104 and the right panel 106 of the frame 1, and the rotation angle is positive and negative 30 degrees under the action of the limiting block 110. The function of the brake assembly 3 is to stop the vehicle running at high speed instantaneously and to provide the unloader with the necessary conditions for its system of supporting its wheels off the road surface.

In the unloading assembly 4, the stroke of a piston 4014 of the hydraulic cylinder 401 is 100 mm, and a 40 mm idle stroke is reserved at the front end of a piston rod 4017 to play a buffering role; the hydraulic cylinder 4O1 adopts a built-in structure of hydraulic oil 4015, the structure has small volume, simple structure and convenient manufacture and maintenance, the return force is provided by the pressure spring 404, an oil pump, an oil tank, a pipeline and control accessories are not required to be additionally arranged, and the working safety and reliability are improved. The magnitude of the pulling force of the piston rod 4017 of the hydraulic cylinder 401 is determined by the mass of the braked vehicle and the magnitude of the instantaneous speed of the braking point. The working principle of the hydraulic cylinder 401 is as follows: under the action of braking inertia force, the steel wire rope 405 pulls the dragging plate 403, the dragging plate 403 pulls the piston rod 4017 and the piston 4014 fixedly installed on the piston rod 4017 to move backwards, the piston 4014 compresses hydraulic oil 4015 in the cylinder 4013 to overflow from the oil port 1, and meanwhile, the hydraulic oil 4015 enters the cylinder 4013 from the oil port 2 to be supplemented; during return stroke, the pressure spring 404 releases tension to push the dragging plate 403, the dragging plate 403 pushes the piston rod 4017 and compresses hydraulic oil 4O15 to move forwards synchronously with the piston 4014, the hydraulic oil 4015 overflows from the oil port 2, the oil port 1 flows into the cylinder 4013 to supplement the hydraulic oil until the piston 4014 is completely reset, and the hydraulic cylinder 401 completes one working cycle. The hydraulic cylinder 401 is fixedly mounted on the hydraulic cylinder fixing plate 402 through a front end cover 4016. The hydraulic cylinder fixing plate 402 is fixed to the guide shaft 407. The dragging plate 403 is movably matched with the guide shaft 407, the dragging plate 403 is symmetrically and fixedly provided with pulling force seats 414, the pulling force seats 414 are connected with the two ends of the steel wire rope 405 through pulling force shafts < not shown >, and the two ends of the steel wire rope 405 are fixedly provided with locking buckles < not shown >; a pressure spring 404 and a positioning guide column 415 are symmetrically and fixedly arranged on the dragging plate 403; the restoring force of the pressure spring 404 is the return force of the piston 4014 in the hydraulic cylinder 401 and the vehicle. The wire rope 405 connects the movable sheave 411, the fixed sheave 410, and the drag plate 403 to transmit the braking inertia force. The movable pulley fixing plate 406 is movably matched with the guide shaft 407, a pulley seat 412 and a positioning guide column 415 are fixedly mounted on the movable pulley fixing plate 406, and the movable pulley fixing plate 406 is in contact with one end of the pressure spring 404 and is subjected to a certain pre-pressure. The movable pulley fixing plate 406 is in sliding fit with one end of the adjusting screw 408 to stabilize the front and rear positions of the adjusting screw 408 and the adjusting movable pulley fixing plate 406 on the guide shaft 407, when the adjusting screw 408 is rotated to move backwards, the movable pulley fixing plate 406 is positioned at the rear end position of the guide shaft 407, the steel wire rope 405 is loosened to be in a loose state, at the moment, the steel wire rope 405 is assembled with the tension seat 414 through the tension shaft < not illustrated >, and the movable pulley 411 and the fixed pulley 410 are assembled with the steel wire rope 405 through the pulley shaft < not illustrated >. When the adjusting screw 408 is rotated to push the movable pulley fixing plate 406 to slide forwards on the guide shaft 407, the steel wire rope 405 is tightened; tightening the locking nut 413 when the wire rope 405 is tightened in place; and (6) assembling in place. Guide shafts 407 provide a guide basis for the drag plate 403 and the movable sheave fixing plate 406. The fixed pulley fixing plate 409 is fixedly installed with the guide shaft 407, the fixed pulley fixing plate 409 is fixedly installed with the pulley seat 412, and the fixed pulley fixing plate 409 is screwed with the adjusting screw 408. The fixed pulley 410 is movably mounted to the pulley holder 412 by a pulley shaft < not illustrated >, and the fixed pulley 410 is rotated by the pulley shaft < not illustrated >. Similarly, the movable pulley 411 is movably mounted to the pulley holder 412 by a pulley shaft < not illustrated >, and the movable pulley 411 rotates by the pulley shaft < not illustrated >. The hydraulic cylinder 401, the pressure spring 404, the dragging plate 403, the movable pulley fixing plate 406, the movable pulley 411, the fixed pulley 410 and the steel wire rope 405 form an unloading system, the unloading capacity is 8:1, namely 8 times of braking inertia force is used for balancing 1 time of unloading force, namely the output of the compression spring force charging hydraulic cylinder 401, the unloading stroke of the automobile on the unloader is 1:8, namely the automobile slides 1 time, and the dragging plate 403 slides 8 times. According to the property of the pulley block, the resultant force is zero when the unloader is unloaded; the braking inertia force and the unloading resistance force are a pair of balance forces, the directions of the balance forces are opposite, and the resultant work is zero. The unloading component 4 is used for unloading the inertia force generated during the high-speed zero-displacement emergency braking of the automobile.

In combination with the working principle of the unloader, the unloader has the advantages that the working button is started, the normally closed end of the two-position three-way electromagnetic valve 212 is electrified for supplying air, the normally open end is powered off for exhausting air, the air pipe 215 supplies air to the cylinder barrel 221 in the translation piece 22 through the five-way pipe joint 213, and the piston rod 223 is connected with the rack 224 and translates backwards; the rack 224 is engaged with the gear 311 on the rotating shaft 31 of the brake assembly 3, and drives the brake assembly 3 to rotate 30 degrees counterclockwise to the stopper 110 to stop. Under the action of the brake assembly 3, the automobile wheel leaves the road surface; and (4) instantaneous system switching, and unloading the automobile by taking the automobile into an unloader. Under the action of the braking inertia force, the transmission plate 108 transmits the braking inertia force to the movable pulley fixing plate 406 through the pulley seat 412, and the movable pulley fixing plate 406 pulls the steel wire rope 405 to slide forwards on the guide shaft 407 through the movable pulley 411 under the action of the braking inertia force; at the same time, the steel wire 405 pulls the dragging plate 403 and the piston rod 4017 through the fixed pulley 410 to compress the compression spring 404 to slide backwards on the guide shaft 407 for unloading. The unloading of the unloader is completed until the vehicle is completely stationary on the unloader. When the unloading of the unloader is finished, the tension of the compression spring 404 is released, so that the dragging plate 403 pulls the steel wire rope 405 to push the piston rod 4017 and the piston 4014 to slide forwards on the guide shaft 407 until the piston 4014 is completely reset; at the same time, the fixed movable pulley plate 406 slides backwards until it is completely restored by contact with the positioning surface of the adjusting screw 408. When the automobile is unloaded and is in a flameout state, the recovery button is pressed down, the normally open end of the two-position three-way electromagnetic valve 212 is electrified to open air supply, the normally closed end is powered off and closed and exhausts air, and the air pipe 214 supplies air to the cylinder barrel 221 in the translation part 22 through the five-way pipe joint 213; the piston rod 223 in the translation member 22 is coupled with the rack 224 to translate forwards, the rack 224 is meshed with the gear 311 on the rotating shaft 31 in the brake assembly 3 to rotate, so that the brake assembly 3 rotates clockwise by 30 degrees to the starting limit block < not illustrated > and stops, and the brake assembly 3 resets; the automobile wheels contact with the road surface to recover the running function. The unloader completes one cycle of operation. The unloader can repeatedly work circularly.

The above example is an implementable version of the zero-displacement safety emergency braking inertial unloader for high-speed driving of an automobile.

In summary, the invention solves the safety defect that the existing automobile can not be emergently braked in high-speed running, and fills the gap of functional structure defects existing in the braking field from the beginning of the automobile. Therefore, the life and property of people can be guaranteed when the automobile runs at high speed in an emergency, and the automobile using requirement that the automobile can be safely and emergently braked when the automobile runs at high speed in an emergency and needs to be safely and emergently braked is met.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims

1. An inertia unloader for zero-displacement safe emergency braking during high-speed running of an automobile, comprising: frame (1), transmission assembly (2), braking component (3), uninstallation subassembly (4), its characterized in that: a transmission assembly (2) is fixedly arranged between a left panel and a right panel at the rear end of a rack (1) and the inner surfaces of the left panel and the right panel, a braking assembly (3) is fixedly arranged at the front and the rear of the rack (1), an unloading assembly (4) is fixedly arranged on the inner surfaces of the left panel and the right panel of the rack (1) between the braking assemblies (3), and the transmission assembly (2) is meshed with the braking assembly (3) through a rack and a gear. A male dovetail 103 and a female dovetail 102 are fixedly arranged at two ends of a left panel and a right panel of a rack (1) in a sliding mode, the female dovetail 102, a linkage rod 101 and an automobile bottom beam (5) form a rigid body and slide in a dovetail groove of the male dovetail 103 in a limited mode, the female dovetail 102 has the function of limiting the freedom degree of the movement space of an automobile during emergency braking, and the space force system borne by the automobile during braking is combined into a plane concentrated force system in the same direction with unloading to be unloaded together.

2. The inertia unloading device for the zero-displacement safe emergency braking of the automobile during the high-speed running according to claim 1, wherein the transmission assembly (2) comprises a miniature air compressor (21) and a flat member (22), a cylinder 221, a compression spring 222, a piston rod 223, a rack 224 and a guide plate 225 are arranged on the flat member (22), the miniature air compressor (21) is connected with the flat member (22) through an air pipe and a five-way pipe joint 213, the rack 224 in the flat member (22) is meshed with a gear 311 in the braking assembly (3), and the cylinder 221 in the flat member (22) is internally provided with the compression spring 222: the function of the brake mechanism is that when no air pressure exists in the cylinder 221, the release elastic force generates torque through the indexing circle radius of the rack 224 and the gear 311 in the brake assembly 3 to limit the free rotation of the brake assembly 3, so that the brake assembly 3 keeps a normal position, and the arrangement of the pressure spring 222 is also beneficial to the reset of the brake assembly 3 after the work is finished.

3. The inertia unloader for the zero-displacement safe emergency braking of the automobile during the high-speed driving according to claim 1, wherein the braking assembly (3) comprises a rotating shaft (31) and a supporting leg (32), the rotating shaft (31) is symmetrically and fixedly provided with a gear 311 and the supporting leg (32), the supporting leg (32) is provided with a braking wheel 321, a telescopic rod 322, a guide key 323, a round screw rod 324, a pressure spring 325, a connecting sleeve 326, a connecting rod 327 and a positioning guide screw rod 328, the supporting leg is internally provided with the pressure spring 325, the braking wheel 321, the telescopic rod 322 and the round screw rod 324 form a rigid body in a detachable mode, the pressure spring 325 is compressed under the action of the braking inertia force at the moment that the braking wheel (321) is in contact with the road surface through the guide key 323 until the unloading is; the function of the guiding key 323 is to guide and limit the free rotation of the telescopic rod 322; the compression spring 325 has the functions of buffering and adjusting the unevenness and the balance of force of the road surface, so that the support legs (32) are in rigid contact with the road surface, and the machine frame (1) is flexibly supported to be more stable in ground gripping; the connecting rod 327 is assembled in the connecting sleeve 326 through the guide key 323 and fixed by a screw (not shown), and the connecting rod 327 and the rotating shaft (31) are fixedly installed by a pin shaft (not shown); a positioning lead screw 328 is threadably connected to coupling sleeve 326 for positioning and preloading compression spring 325 and for guiding compression spring 325 as it is compressed.

4. The inertia unloader for zero-displacement safety emergency braking of automobile high-speed traveling according to claim 1, wherein the unloading assembly (4) comprises a hydraulic cylinder 401, a hydraulic cylinder fixing plate 402, a dragging plate 403, a pressure spring 404, a wire rope 405, a movable pulley fixing plate 406, a guide shaft 407, an adjusting screw 408, a fixed pulley fixing plate 409, a fixed pulley 410, a movable pulley 411, a pulley holder 412, a locking nut 413, a tension holder 414, a positioning guide column 415; the unloading process of the unloading assembly 4 is as follows: the inertia force of the automobile brake is transmitted to the movable pulley fixing plate 406 through the pulley seat 412 of the transmission plate 108, the movable pulley 411 and the steel wire rope 405 are driven to slide forwards on the guide shaft 407, the steel wire rope 405 pulls the dragging plate 403 through the fixed pulley 410, and the dragging plate 403 drags the piston rod 4017 in the hydraulic cylinder 401 to compress the compression spring 404 to slide backwards, so that unloading is carried out; the unloading principle of the unloading mechanism is that the unloading mechanism is unloaded by combining the properties of a pulley and a pulley block with the hydraulic principle of a hydraulic cylinder and combining a steel wire rope, the unloading mechanism is safe and reliable in unloading, large in unloading capacity and simple and compact in structure, and a piston 4014 on the hydraulic cylinder 401 and an automobile are reset by using the restoring force of a pressure spring 404.

5. The inertia unloader for the zero-displacement safe emergency braking of the automobile during the high-speed running according to claim 4 is characterized in that the hydraulic cylinder 401 in the unloading assembly (4) comprises a rear end cover 4011, an oil storage pipe 4012, a cylinder barrel 4013, a piston 4014, hydraulic oil 4015, a front end cover 4016 and a piston rod 4017; the hydraulic cylinder 401 adopts a hydraulic oil 4015 built-in structure, the structure is small in size, simple in structure, convenient to maintain and high in working reliability, and an oil pump, an oil tank, a pipeline and control accessories are not required to be additionally arranged under the action of the spring force of the pressure spring 404, so that the use safety and reliability of the hydraulic cylinder are greatly improved.