CN205131223U - Be applied to emergency braking auxiliary device of heavy semitrailer - Google Patents
Be applied to emergency braking auxiliary device of heavy semitrailer Download PDFInfo
- Publication number
- CN205131223U CN205131223U CN201520964768.0U CN201520964768U CN205131223U CN 205131223 U CN205131223 U CN 205131223U CN 201520964768 U CN201520964768 U CN 201520964768U CN 205131223 U CN205131223 U CN 205131223U
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- China
- Prior art keywords
- braking
- auxiliary device
- emergency braking
- trailer
- semitrailer
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Abstract
The utility model relates to a heavy safe aspect of semitrailer braking discloses a be applied to emergency braking auxiliary device of heavy semitrailer. The device installs about the semi -trailer frame rear portion each one, is controlled by semitrailer air braking system, through atmospheric pressure elevating gear control vacuum chuck's lift, utilizes in the vacuum pump extraction vacuum chuck air to produce brake force in order to reach the required vacuum of system, and supplementary semitrailer carries out emergency braking, simultaneously when turning the braking about control the different vacuums of two devices in order to realize the control of semitrailer stability. The utility model discloses simple structure, low in manufacturing cost to can guarantee the braking security and the control stability of heavy semitrailer.
Description
Technical field:
The utility model relates to automobile braking safety aspect, in particular, relates to a kind of emergency braking auxiliary device being applied to heavy semi-trailer.
Background technology:
Heavy semi-trailer has the advantage that transportation volume is large, cost is low, efficient and economic, is used widely in goods transport.But due to load carrying ability weight, size is large, and barycenter high, causes its riding stability and safety to cause anxiety, very easily traffic accident occurs, cause life and property loss.Along with the raising that society requires for automotive safety, the research of heavy semi-trailer deceleration and stopping performance becomes focus.
Along with the continuous progress of auto-industry and the expansion at full speed of express highway, running velocity is more and more faster.When running into emergency situation braking, the brake system of heavy semi-trailer can not ensure, limiting apart from interior parking, easily to cause rear-end impact accident.Simultaneously because the axletree of superimposed trailer mainly concentrates on rear portion, the supply air line controlled with tractor truck is distant, causes brake action obviously to lag behind the inharmonious state of braking of tractor truck, therefore produces inertial impact force, easily produce Fold.During turning around a curve braking simultaneously very easily there is larger path offset and rollover in superimposed trailer, brings great traffic safety hidden danger.
The domestic and international research for heavy semi-trailer deceleration and stopping performance at present focuses mostly in brakig force distribution, brake system and control cock optimization, but rear-end impact in emergency braking situation and rollover, the phenomenon such as folding cannot be avoided, also cannot realize ramp to stop when brake system loop fault.Although the utility model of domestic existing negative pressure brake equipment is open, the device that this patent provides is only applicable to manned vehicle, uses additional machinery or hydraulic efficiency power unit, and does not have corresponding Handling stability control measure.Therefore be necessary to carry out the emergency braking auxiliary device research being applied to heavy semi-trailer of the present utility model.
Summary of the invention:
The purpose of this utility model is to overcome prior art Problems existing, provides a kind of emergency braking auxiliary device being applied to heavy semi-trailer, utilizes negative pressure in case of emergency to realize superimposed trailer auxiliary braking.
For achieving the above object, the utility model adopts following technical scheme to realize:
Be applied to an emergency braking auxiliary device for heavy semi-trailer, it is characterized in that an emergency braking auxiliary device is installed respectively in left and right below semi-trailer frame rear end, is controlled by superimposed trailer Pneumatic braking system.It is made up of electrical motor, master cock, auxiliary braking air chamber, lifter, vacuum cup, vacuum pump; Master cock and the speed sensor linearly connected being arranged on brake pedal place, pressure gas after switch open in superimposed trailer air receiver enters auxiliary braking air chamber through relay and quick release valve, controlling lifter makes vacuum cup drop to ground surface end, and vacuum pump is by direct motor drive.
To step on the throttle pedal or press the withdrawal button being arranged on operator's compartment master cock can be made to disconnect when chaufeur described in technical scheme.
Vacuum pump described in technical scheme is also connected with the lateral acceleration sensor of body electronics stabilization system, is provided with vacuum degree control unit simultaneously, controls the size of degree of vacuum in vacuum cup.
Compared with prior art the beneficial effects of the utility model:
1, a kind of emergency braking auxiliary device being applied to heavy semi-trailer of providing of the utility model, two emergency braking auxiliary devices are installed in semi-trailer frame rear end, the second cover braking force source can be provided on original brake system when chaufeur emergency braking, the restriction of road surface limit of adhesion for braking force can be broken through, increase effectively system total braking force size, shorten stopping distance to a great extent, improve superimposed trailer and travel and braking safety.
2, longer based on heavy semi-trailer Pneumatic braking system pipeline, superimposed trailer brake power all comes from tractor truck, and the weight carried cargo due to superimposed trailer concentrates on rear portion, the braking force that road surface can provide is difficult to provide larger braking deceleration, when emergency braking, superimposed trailer brake action usually lags behind tractor truck brake action greatly, easily causes folding dangerous phenomenon.The emergency braking auxiliary device that the present invention adopts then effectively raises the brake response speed of superimposed trailer, weakens the braking retardation of superimposed trailer for tractor truck, effectively prevent superimposed trailer Fold during braking.
3, be directly connected with superimposed trailer Pneumatic braking system by emergency braking auxiliary device, utilize the pneumatic supply input jacking system of Conventional braking systems, avoid the installation in additional power source, make simple and reasonable, emergency braking auxiliary device response is reliable rapidly.
4. for superimposed trailer brakeing during cornereing operating mode, turn left when generation not enough, turn left excessively, turn right not enough and when turning right excessive, control left and right emergency braking auxiliary device respectively and produce different additional braking force and control to realize superimposed trailer stability.Specifically, superimposed trailer left understeering time, control left-hand unit and produce the degree of vacuum larger than right-hand unit; Left during oversteer, cut off left-hand unit and connect, only trigger right-hand unit; To the right during understeering, control right-hand unit and produce the degree of vacuum larger than left-hand unit; To the right during oversteer, cut off right-hand unit and connect, only trigger left-hand unit.Compared to only installing an emergency braking auxiliary device below vehicle frame, effectively can ensure the road-holding property of vehicle, avoiding the unsafe condition that superimposed trailer, when emergency braking, whipping occurs, unstability is even turned on one's side.
Accompanying drawing illustrates:
Accompanying drawing 1 is the semitrailer brake system schematic diagram of emergency braking auxiliary device provided by the invention.
Accompanying drawing 2 is principle of device schematic diagrams of emergency braking auxiliary device provided by the invention.
In Fig. 2:
1 is the rubber diaphragm of auxiliary braking air chamber, 2 is step disks, and 3 is springs, and 4 is push rods, 5 is shaft cleviss, 6 is lifting bar (being connected with bolt with shaft clevis 5), and 7 is vacuum cup bleeding point (being connected with air-inlet of vacuum pump), and 8 is vacuum cup inner chambers, 9 is vacuum cups, comprise 10 flexible portions and 11 rigid elements, 10 flexible portions are many lips limit rubber, and 11 rigid elements are metal.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
With reference to accompanying drawing 1, be semitrailer brake system schematic diagram, this brake system is dual circuit loop.During service brake, chaufeur steps on brake pedal, pressurized air enters trailer brake system pipeline through the trailer braking valve of tractor truck, pass through emergency brake valve, back down valve, gas enters propons and back axle compressed air brake cylinder respectively, and the diaphragm of compressed air brake cylinder is encircleed to the right, is released by push rod and drives braking adjusting arm and brake shoe expander to rotate and realize service brake.When the speed that chaufeur steps on brake pedal is greater than threshold value, master cock closes, pressure gas enters auxiliary braking air chamber, the diaphragm of auxiliary braking air chamber is encircleed to the right and is released by push rod, drives the lifting push rod that shaft clevis connects that vacuum cup is contacted to earth and starts effect.
With reference to accompanying drawing 2, it is the principle of device schematic diagram of emergency braking auxiliary device.During emergency braking, when the speed that chaufeur steps on brake pedal is greater than threshold value, in accompanying drawing 1, in brake system, master cock closes, auxiliary braking air chamber is got involved in semitrailer brake system, then pressurized air enters the epitrochoidal chamber in auxiliary braking air chamber cover and rubber diaphragm 1, and rubber diaphragm 1 is encircleed to the right, drives spring 3 to promote push rod 4, shaft clevis 5 is connected by tapped bore with push rod 4, promotes lifting bar and makes vacuum cup kiss the earth.When simultaneity factor starts, electrical motor (not shown in FIG.) is started working, connect vacuum-pump power supply, vacuum pump is made to start the air of extracting vacuum sucker inner chamber 8 by vacuum cup bleeding point, the flexible portion 10 of vacuum cup is many lips limit rubber structure, can a part of impurity be isolated when vacuum pump extracting air, cause the pressure P of vacuum cup inner chamber
1than barometric pressure P
0little many, and P
1can regulate according to braking emergency.According to the negative pressure value of vacuum cup inner chamber, the area being multiplied by vacuum cup can obtain relevant pressure to form additional emergency brake power, with auxiliary superimposed trailer sudden stop.Under brakeing during cornereing operating mode, when lateral acceleration sensor detects that vehicle lateral acceleration value is greater than threshold value, control two, left and right emergency braking auxiliary device by control unit and produce the negative pressure value of corresponding different size to realize the control of superimposed trailer lateral stability.After vehicle stops completely, chaufeur is pressed and is arranged on return button in operator's compartment or pedal of stepping on the throttle, master cock is disconnected, then epitrochoidal chamber then leads to air by the exhausr port of emergency brake valve, spring 3 shifts rubber diaphragm 1 onto left-limit position by the step disk 2 be welded on push rod 4, and lifting push rod is regained, remove emergency braking auxiliary device.
Above discussion is only preferred embodiment of the present utility model, and being to explain and illustrating, is not the restriction to the utility model itself.The utility model is not limited to specific embodiment disclosed herein, and is determined by claim below.All do not deviate from the utility model basic conception these embodiments, change and distortion be all in the protection domain of claims.
Claims (3)
1. one kind is applied to the emergency braking auxiliary device of heavy semi-trailer, it is characterized in that an emergency braking auxiliary device is installed respectively in left and right below semi-trailer frame rear end, be controlled by superimposed trailer Pneumatic braking system, it is made up of electrical motor, master cock, auxiliary braking air chamber, lifter, vacuum cup, vacuum pump; Master cock and the speed sensor linearly connected being arranged on brake pedal place, pressure gas after switch open in superimposed trailer air receiver enters auxiliary braking air chamber through relay and quick release valve, controlling lifter makes vacuum cup drop to ground surface end, and vacuum pump is by direct motor drive.
2. a kind of emergency braking auxiliary device being applied to heavy semi-trailer according to claim 1, is characterized in that chaufeur is stepped on the throttle pedal or press the withdrawal button being arranged on operator's compartment master cock can be made to disconnect.
3. a kind of emergency braking auxiliary device being applied to heavy semi-trailer according to claim 1, described vacuum pump is also connected with the lateral acceleration sensor of body electronics stabilization system, be provided with vacuum degree control unit simultaneously, control the size of degree of vacuum in vacuum cup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520964768.0U CN205131223U (en) | 2015-11-27 | 2015-11-27 | Be applied to emergency braking auxiliary device of heavy semitrailer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520964768.0U CN205131223U (en) | 2015-11-27 | 2015-11-27 | Be applied to emergency braking auxiliary device of heavy semitrailer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205131223U true CN205131223U (en) | 2016-04-06 |
Family
ID=55617041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520964768.0U Expired - Fee Related CN205131223U (en) | 2015-11-27 | 2015-11-27 | Be applied to emergency braking auxiliary device of heavy semitrailer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205131223U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106671953A (en) * | 2017-01-18 | 2017-05-17 | 万忠勇 | Vacuumized adsorption bottom surface type automobile emergency braking and turnover and drifting preventing device |
-
2015
- 2015-11-27 CN CN201520964768.0U patent/CN205131223U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106671953A (en) * | 2017-01-18 | 2017-05-17 | 万忠勇 | Vacuumized adsorption bottom surface type automobile emergency braking and turnover and drifting preventing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20181127 |