CN1355117A - Negative-pressure emergency brake of car - Google Patents
Negative-pressure emergency brake of car Download PDFInfo
- Publication number
- CN1355117A CN1355117A CN 01144976 CN01144976A CN1355117A CN 1355117 A CN1355117 A CN 1355117A CN 01144976 CN01144976 CN 01144976 CN 01144976 A CN01144976 A CN 01144976A CN 1355117 A CN1355117 A CN 1355117A
- Authority
- CN
- China
- Prior art keywords
- negative
- emergency brake
- car according
- brake
- electromagnetic valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Braking Arrangements (AREA)
Abstract
A negative-pressure emergency braking unit for automobile is arranged to the rear position of chassis and is composed of casing, limit switch, lifting unit, electromagnet, spring, braking block, negative pressure cavity, electromagnetic and manual valves, vacuum pump, etc.. Its advantages include simple and reasonable structure, negative pressure braking, short braking distance and high safety.
Description
Technical field
The present invention relates to a kind of brake equipment, in particular, relate to a kind of negative-pressure emergency brake of car.
Background technology
At present, highway communication is the main mode of transportation of countries in the world, and along with the raising of category of highways and the fast development of express highway, automobile speed is constantly accelerated thereupon, brings a lot of convenience for the people's work and life.But consequent pernicious traffic accident is also significantly risen thereupon, its major cause is that the speed of a motor vehicle is too fast, when in case of emergency, the brake system of automobile can not make automobile stop in short range, though the brake system of automobile repeatedly is modified, but change ten thousand times without leaving the original aim or stand, mainly be brake signal to be passed to hydraulic brake system by brake pedal, make brake facing and brake drum closed contact, produce friction force, wheel is finally stopped operating, and the kinetic energy during running car can only the roller tire and the road surface between friction discharge.Yet depending merely on these, to dwindle braking distance be far from being enough, too fast when car speed, also can cause the rotation of automobile and the phenomenon of rolling during emergency braking, equally also is danger close.
Theoretically, when the weight of automobile and carrier is mg, be V in travels down speed, then its kinetic energy is:
If the equivalent friction factor between motor tire and the road surface is μ
1, when the automobile emergency glancing impact, the friction force between car and the road surface is: mg μ
1
Disregard air resistance, stopping distance is: S
1=0.5m V
2/ mg μ
1=V
2/ 2g μ
1
Hence one can see that, and square being directly proportional of braking distance and the speed of a motor vehicle is inversely proportional to the first power of friction coefficient.
When the distance of automobile and front object is L, stopping distance S
1During＜L, automobile is not hit.S
1During＞L, automobile is hit, the dangerous generation.But on during thing, with regard to present motor tire and the structural relation between the road surface, the automobile emergency glancing impact is because the powerful action of inertia of automobile tends to the rotation of automobile take place or roll, even S
1＜L, danger still can take place.
Summary of the invention
The present invention has remedied the deficiencies in the prior art, and negative-pressure emergency brake of car a kind of simple in structure, easy to use, quick, safe is provided.
The technical scheme of negative-pressure emergency brake of car of the present invention is summarized as follows:
It comprises a device box, the top of device box is provided with limit switch and jacking system, is disposed with electromagnet adapter plate, electromagnet, spring dead plate, spring, spring abutment, brake shoe, decline limit switch lifting bar, limit switch below the described jacking system; The side of spring abutment is provided with electromagnetic valve B, flexible pipe, the universal knot of pull bar above the described brake shoe; The universal knot of described pull bar place is provided with pull bar, and the other end of pull bar is arranged on the Connection Block on the car chassis that is fixed in automotive front; The other end of described flexible pipe is connected with electromagnetic valve A, and electromagnetic valve A and negative pressure cavity join; Also be provided with hand valve and electromagnetic valve C on the described negative pressure cavity, the electromagnetic valve C tool vacuum pump of meeting sb. at the airport; Described negative pressure cavity and oil-sealed rotary pump be arranged on the automobile or the automobile casing in.
Described jacking system is hydraulic lift or mechanical lifting gear, described spring is 1～100, described flexible pipe is the vacuum rubber flexible pipe, the end of described flexible pipe is respectively arranged with dust filter, the volume of described negative pressure cavity is 0.05～1 cubic meter, described brake shoe is 1～20, cumulative volume is 1/200～1/3 of a negative pressure cavity volume, described brake shoe is made up of rigidity partial sum flexible portion, rigidity partly is a metal, engineering plastics or glass-felt plastic, flexible portion is rubber or flexible plastic, and described negative pressure cavity and oil-sealed rotary pump are arranged on the back case of automobile, railway carriage, in railway carriage bottom or the machine tank.
The invention has the beneficial effects as follows, rational in infrastructure, simple, easy to use, utilize negative pressure braking, actv. reduces braking distance, and the rotation can prevent automobile brake time the and rolling, and is quick, safe brake device for car.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the cutaway view of brake shoe of the present invention;
Fig. 3 is the scheme drawing of the universal knot of pull bar of the present invention.
The specific embodiment
Among Fig. 1, be fixed with device box 22 on the chassis 27 of the lower rear of automobile, the upper ledge of device box 22 is provided with limit switch 14 and jacking system 3, and described jacking system 3 is hydraulic lift or mechanical lifting gear; Be disposed with electromagnet adapter plate 23, electromagnet 6, spring dead plate 24, spring 8, spring abutment 26, brake shoe 25, decline limit switch lifting bar 5, limit switch 4 below the push rod 15 of described jacking system 3; Described spring 8 is 1～100; The side of spring abutment 26 is provided with the universal knot 11 of electromagnetic valve B17, flexible pipe 21 and pull bar above the described brake shoe 25; The universal knot of described pull bar 11 places are provided with pull bar 12, and as shown in Figure 3, the other end of pull bar 12 is arranged on the Connection Block 13 on the car chassis 27 that is fixed in automotive front, but this device actv. plays the role of positioning to brake shoe; Described brake shoe 25 is 1～20, cumulative volume is 1/200～1/3 of negative pressure cavity 2 volumes, and brake shoe 25 is made up of rigidity part 9 and flexible portion 10, as shown in Figure 2, rigidity part 9 is metal, engineering plastics or glass-felt plastic, and flexible portion 10 is rubber or flexible plastic; Described flexible pipe 21 is preferably the vacuum rubber flexible pipe; The other end of described flexible pipe 21 is connected with electromagnetic valve 16, and the end of described flexible pipe 21 is respectively arranged with dust filter 20, prevents that dust is inhaled into negative pressure cavity; Described electromagnetic valve 16 joins with negative pressure cavity 2; Also be provided with hand valve 19 and electromagnetic valve 18 on the described negative pressure cavity 2, the volume of negative pressure cavity 2 is 0.05～1 cubic meter, described hand valve 19 uses when the dedusting of filter 20, open hand valve 19 during dedusting, charge into pressurized air, pressurized air is run out of in electromagnetic valve 16, flexible pipe 21 automatically, and dust is blown off; The electromagnetic valve 18 tool vacuum pump 1 of meeting sb. at the airport; Described negative pressure cavity 2 and oil-sealed rotary pump 1 are arranged in back case, railway carriage, railway carriage bottom or the machine tank of automobile.
Also can be provided with stage clip between electromagnet adapter plate 23 in the described brake equipment and the electromagnet 6, brake equipment is shielded.
Use when of the present invention, usually can be in the following way:
After automobile reaches express highway, open the direction switch of negative-pressure emergency brake of car, decline limit switch lifting bar 5 stretches out, jacking system 3 is started working, as adopt hydraulic lift, at this moment oil cylinder push rod 15 ejects the electromagnet adapter plate 23, electromagnet 6, spring dead plate 24, spring 8, spring abutment 26, brake shoe 25 and the decline limit switch 4 that are located at below it together, when decline limit switch 4 contacts to earth in an instant, hydraulic pressure or mechanical system 3 quit work, and the lifting bar 5 of decline limit switch is withdrawn.
Press then and be arranged on the switch of controlling in the chamber, connect the power supply of oil-sealed rotary pump 1, the electromagnetic valve 18 between oil-sealed rotary pump 1 and the negative pressure chamber 2 is in on-state, and oil-sealed rotary pump 1 makes in the negative pressure chamber 2 and is negative pressure, makes it in running order.
When needs use this negative-pressure emergency brake of car, then touch the emergency braking switch that has normally closed open contact that is arranged on the brake pedal place, the electromagnetic valve 17 that this switch is located at when being in normally off on the brake shoe is in on-state, and the electromagnetic valve 16 that is located on the negative pressure chamber is closed state.In the time of the needs emergency braking, depress the emergency braking switch, the open contact of brake switch is connected, this moment, electromagnetic valve 17 was in closed state, and electromagnetic valve 16 is on-state, simultaneously, the iron core 7 of electromagnet 6 ejects rapidly, brake shoe 25 is promptly depressed, made the flexible portion 10 and ground closed contact of brake shoe 25, at this moment because the electromagnetic valve 17 on the brake shoe 25 is in closed state, be in on-state and be connected the electromagnetic valve 16 that joins between flexible pipe 21 on the brake shoe 25 and the negative pressure chamber 2, because negative pressure chamber 2 is negative pressure state, then barometric pressure forces brake shoe to hold the road surface tightly, makes the automobile in travelling rapid, be braked safely.
After additional negative pressure braking, kinetic energy originally discharges formula and becomes:
Here μ
2Be the friction coefficient between brake shoe and the road surface, P
0Be barometric pressure, P is a negative pressure value in the brake shoe, A
iBe that i brake shoe covers ground-surface payload space, S
2Stopping distance for this moment.
There are two adjustable parameters in this additional braking force source, and one is negative pressure value, and one is that brake shoe covers the ground-surface gross area, and when negative pressure value one timing, only the adjustment of area just has very big effect.
After this device has been finished the braking task of automobile, lift the emergency braking switch that has normally closed open contact at brake pedal place, make this switch be in normally off, electromagnetic valve 17 on the brake shoe 25 is in on-state, the electromagnetic valve 16 that is located at simultaneously on the negative pressure cavity 2 is closed state, make and recover atmospheric pressure state in the brake shoe 25, brake shoe 25 and surface separation, give electromagnet 6 with signal again, regain iron core 7, order jacking system 3 to make it simultaneously with electromagnet adapter plate 23, electromagnet 6, spring dead plate 24, spring 8, spring abutment 26, brake shoe 25, decline limit switch lifting bar 5, limit switch 4 together is recovered in the device box 22, when jacking system 3 contacted limit switch 14, jacking system quit work.
Claims (10)
1. negative-pressure emergency brake of car, it is characterized in that, it comprises a device box, the top of device box is provided with limit switch and jacking system, is disposed with electromagnet adapter plate, electromagnet, spring dead plate, spring, spring abutment, brake shoe, decline limit switch lifting bar, limit switch below the described jacking system; The side of spring abutment is provided with electromagnetic valve, flexible pipe, the universal knot of pull bar above the described brake shoe; The universal knot of described pull bar place is provided with pull bar, and the other end of pull bar is arranged on the Connection Block on the car chassis that is fixed in automotive front; The other end of described flexible pipe is connected with electromagnetic valve, and electromagnetic valve and negative pressure cavity join; Also be provided with hand valve and electromagnetic valve on the described negative pressure cavity, the electromagnetic valve tool vacuum pump of meeting sb. at the airport; Described negative pressure cavity and oil-sealed rotary pump be arranged on the automobile or the automobile casing in.
2. negative-pressure emergency brake of car according to claim 1 is characterized in that, described jacking system is a hydraulic lift.
3. negative-pressure emergency brake of car according to claim 1 is characterized in that, described jacking system is a mechanical lifting gear.
4. negative-pressure emergency brake of car according to claim 1 is characterized in that, described spring is 1～100.
5. negative-pressure emergency brake of car according to claim 1 is characterized in that, described flexible pipe is the vacuum rubber flexible pipe.
6. negative-pressure emergency brake of car according to claim 1 is characterized in that the end of described flexible pipe is respectively arranged with dust filter.
7. negative-pressure emergency brake of car according to claim 1 is characterized in that, the volume of described negative pressure cavity is 0.05～1 cubic meter.
8. negative-pressure emergency brake of car according to claim 1 is characterized in that, described brake shoe is 1～20, and cumulative volume is 1/200～1/3 of a negative pressure cavity volume.
9. negative-pressure emergency brake of car according to claim 1 is characterized in that, described brake shoe is made up of rigidity partial sum flexible portion, and rigidity partly is metal, engineering plastics or glass-felt plastic, and flexible portion is rubber or flexible plastic.
10. negative-pressure emergency brake of car according to claim 1 is characterized in that, described negative pressure cavity and oil-sealed rotary pump are arranged in back case, railway carriage, railway carriage bottom or the machine tank of automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01144976 CN1355117A (en) | 2001-12-26 | 2001-12-26 | Negative-pressure emergency brake of car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01144976 CN1355117A (en) | 2001-12-26 | 2001-12-26 | Negative-pressure emergency brake of car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1355117A true CN1355117A (en) | 2002-06-26 |
Family
ID=4677929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01144976 Pending CN1355117A (en) | 2001-12-26 | 2001-12-26 | Negative-pressure emergency brake of car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1355117A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107226073A (en) * | 2017-05-12 | 2017-10-03 | 利辛县凯盛汽车有限公司 | A kind of flat-bed trailer equipped with support frame |
| CN107618580A (en) * | 2016-07-14 | 2018-01-23 | 电子科技大学 | A kind of Antiskid chassis and the dolly with the Antiskid chassis |
| CN112208495A (en) * | 2020-09-29 | 2021-01-12 | 陆吉祥 | Zero-displacement safe emergency braking inertia unloading device for high-speed running of automobile |
-
2001
- 2001-12-26 CN CN 01144976 patent/CN1355117A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107618580A (en) * | 2016-07-14 | 2018-01-23 | 电子科技大学 | A kind of Antiskid chassis and the dolly with the Antiskid chassis |
| CN107226073A (en) * | 2017-05-12 | 2017-10-03 | 利辛县凯盛汽车有限公司 | A kind of flat-bed trailer equipped with support frame |
| CN112208495A (en) * | 2020-09-29 | 2021-01-12 | 陆吉祥 | Zero-displacement safe emergency braking inertia unloading device for high-speed running of automobile |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102009644A (en) | Automobile auxiliary brake-powered speed-reduction friction device and braking method thereof | |
| CN1328097C (en) | Multi-purpose emergency apparatus of automobile | |
| CN201099230Y (en) | Automobile antiskid auxiliary brake device | |
| CN1222465A (en) | Vacuum emergency brake equipment | |
| CN1355117A (en) | Negative-pressure emergency brake of car | |
| CN1355116A (en) | Brake system of car | |
| CN1224541C (en) | Active device for preventing automobile wear end collision | |
| CN202378862U (en) | Automobile, anti-overturn safety system and anti-overturn safety device for automobile | |
| CN201619402U (en) | Automobile tire burst rollover prevention device | |
| CN201224399Y (en) | Disposal air bag suction cup for emergency brake of sedan car | |
| CN2353626Y (en) | Automatic safety device for automobile when tyre burst | |
| CN2175147Y (en) | Electric pneumatic equipment for pushing pedestrians for safety purpose | |
| CN201842072U (en) | Boost speed-reducing friction device of automobile auxiliary brake | |
| CN1316358A (en) | Emergency brake of car | |
| CN2236982Y (en) | Emergency braking device for motor vehicle | |
| CN2537609Y (en) | Auxiliary braking wood for emergency brake | |
| CN2087153U (en) | Electromagnetic and pneumatic brake device for trailer | |
| CN219544739U (en) | Mining explosion-proof vehicle safety braking device | |
| CN2785928Y (en) | Assistant apparatus for automobile emergent brake | |
| CN103723028A (en) | Automatic air automobile | |
| CN201195560Y (en) | Novel automobile chassis | |
| CN2905573Y (en) | Automobile brake device | |
| CN220727905U (en) | Gas storage system device of wrecker rescue vehicle | |
| CN2474389Y (en) | Single rail carriage | |
| CN216508295U (en) | Truck emergency braking and emergency trapping self-rescue device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |