CN2111230U

CN2111230U - Automobile emergency brake

Info

Publication number: CN2111230U
Application number: CN 91206019
Authority: CN
Inventors: 许传玲
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-04-18
Filing date: 1991-04-18
Publication date: 1992-07-29

Abstract

The utility model relates to an automobile emergency brake. A brake shoe is provided with a hole for fixing a position limiting rope and a semicircle hole for the head of the position limiting rope to return. A layer of filler is arranged on the brake shoe for increasing friction coefficient. The brake shoe is also provided with two convex faces, and the middle is provided with a position limiting beam. When braking, the beam is inserted in the middle between two rear wheels. The brake shoe is connected with a slide way. A reset spring is sheathed on the slide way. When a driver steps on a pedal, a latch is pulled out from the brake shoe through a transmission rope and a pulley. Because of the action of the spring, the brake shoe can tightly cling to a tire. Moreover, a reset tool can be used for resetting the brake shoe. The brake can be used in emergency.

Description

Automobile emergency brake

The utility model relates to a kind of emergency brake for automobile, belongs to the automobile technical field of part in addition.

The surge of automobile quantity is used in countries in the world at present, vehicle at running on expressway, speed per hour is up to per hour 100 kilometers, owing to many-sided reason, the traffic accident of collision often takes place, also do not solve the report of the not enough difficult problem of skid resistance so far, though the domestic accident that hundred cars collisions did not take place, but the number of times that the each province gets into an accident every year also is very surprising, and the contriver had once repeatedly witnessed the scene of traffic accident, profoundly feels to need badly the device that solves vehicle safety travel.

The purpose of this utility model is that a kind of emergency brake for automobile will be provided, and the driver can use this device can shorten braking distance under emergency situation, can avoid traffic accident, and this device can overcome above-mentioned deficiency.

The purpose of this utility model is to realize like this, at first according to mechanics principle, analyzed the mechanics factor of emergency braking, adopt a kind of brake shoe brake cheek of cattle horn shape, it combines with slide rail, when the driver steps on brake pedal, make transmission rope through pulley, the pulling dead bolt pulls out it from the hole of brake shoe brake cheek, owing to be contained in the effect of the retracing spring on the slide rail, brake shoe brake cheek is spurred inwards and hug tire, together roll forward, be fixed on after spacing rope on the brake shoe brake cheek is straightened, automobile just begins sliding of former brake system.(spacing rope is temporarily on probation)

The mechanical analysis figure of accompanying drawing 1, brake principle

The scheme drawing of brake shoe brake cheek when Fig. 2, automobile normal running

Fig. 3, drg condition of service scheme drawing

Fig. 4, brake process scheme drawing

The scheme drawing that Fig. 5, brake stop

Fig. 6, pedal position figure

The scheme drawing of resetting tool after Fig. 7, the brake

The scheme drawing of Fig. 8, bi-directional braking hoof structure

Fig. 9, the site plan of tire and brake shoe brake cheek when not braking

The A-A cutaway view of Figure 10, Fig. 9

The scheme drawing of brake shoe brake cheek behind Figure 11, the removal tire

The B-B cutaway view of Figure 12, Figure 11

Figure 13, use the scheme drawing of garden post spring instead

The scheme drawing of Figure 14, employing hydraulic efficiency pressure system

Now in conjunction with the accompanying drawings the structure of emergency brake for automobile is described in further detail in down:

When being the impulse force FM that is produced by inertia between when utilizing brake several seconds by Fig. 1, this device, demutation goes out 2 resistances opposite with impulse force FM again, and these 2 resistances and original skid resistance F2 divide three to go on foot and finish.

Verify with two examples below:

Example 1: establish car mass M=10000Kg, 50 kilometers of speed per hours, brake shoe brake cheek 1 angle are established 20 degree.

Per second speed U=1000M * 50 ÷ 3600/S=13,88M/S

Impulse force FM=M, U/t2=10000Kg * 13 during brake, 88 ÷ 2=69400Kg

T2 is general 2～3 seconds of the in-service time in when brake

The variation of brake shoe brake cheek 1 among Fig. 4, Fig. 5 is seen in the effect of the first step: F1 ' (F1 ") resistance.During (brake shoe brake cheek 1 is a cattle horn shape triangle) brake:

Car rushes to brake shoe brake cheek 1 with the speed of per second 13,88M, and the unexpected rising of car body locates to make Fn FX ' among Fig. 1 and F1 ' (F1 ") that the variation of power takes place.Perpendicular to the static pressure Fn=M on brake shoe brake cheek 1 inclined-plane, COS20=10000Kg * 0.939=9390Kg

FX’＝Fn×U＝9397Kg×13.88＝130430Kg

FX ' car rushes to brake shoe brake cheek 1, the car vertical pressure to brake shoe brake cheek 1 inclined-plane with the speed of per second 13,88M

F3=M * Sin20 °=10000Kg * 0.34=3420Kg(F3 sliding force equates with F1 thrust (pulling force) disregarding frictional resistance)

F3’＝F3×U＝3420Kg×13.88M／S＝47469Kg

(F3 ' car when speed is arranged sliding force and the effect of F3 power separate sensible with)

Resistance F1 ' the FX of car when to rush to angle be the brake shoe brake cheek 1 of 20 degree with the speed of per second 13,88M "=FX ' * U1=130430Kg * 0.02=2609Kg

FX " be the frictional resistance that under the pressure of FX ', produces.

Coefficient of friction when U1 is a wheel with the bearing element of axle.

Directed force F 1 ' F1 '=FX during personal new brake system "+resistance F1 when the new and old brake system of F3 '=2609Kg+47469=50078Kg is united uses (stepping on any former brake) "

F1”＝FX’·U2＋F3’

F1”＝130430Kg×0.2＋47469Kg＝73555Kg

F1 " the impulse force FM value that produces when having surpassed brake of Resistance Value.

U2 is the coefficient of friction when stepping on a bit former the brake, selects 0,2 much smaller than U3.

Can never produce the wheel dead phenomenon of stopping like this, could can not make brake shoe brake cheek 1 out of control.(if wheel is stopped extremely, and wheel just can not drive brake shoe brake cheek 1 and rotate, and brake shoe brake cheek 1 does not rotate does not just have new braking effect)

Second step: skid resistance F2 originally:

F2＝M·U3＝10000Kg×0、71＝7100Kg

U3 is that vehicle tyre is for the ground-surface coefficient of friction.This resistance of F2 carries out after F1 ' (F1 ") stops.The termination of F1 ' (F1 ") is to realize by the spacing rope 13 among Fig. 5.

The 3rd step: see the sliding force F3 among Fig. 1 again, through the counteraction of above-mentioned two resistances, make impulse force FM that very big decay be arranged, car can be automatically 1 be resigned from office along reversing sense from brake shoe brake cheek when impulse force FM decays to less than sliding force F3.

By the counteraction of above-mentioned 3 step resistances, see its braking effect again.

The impulse force FM ' that personal new brake system will consume

FM’＝0～FM2＋F2＋F3

FM’＝53500Kg＋7100Kg＋3420＝64020Kg

0～FM2 is the distance that the impulse force FM baseline from Fig. 1 gets with dipstick metering.

Every centimeter impulse force FM that represents 10000Kg.

Ratio=FM/FM '=69400Kg ÷ 64020Kg=1,08 new braking distance=9,8M-9,8M ÷ 1,08=8,72M calculate from above F1 "; visible car runs into dangerous situation; former brake system is not out of control; new and old brake system is united the best when using; theoretical braking distance and the braking distance on the actual highway that calculates is widely different; be the inconsistent reason of ground-surface condition, and be also new and old relevant with the tire of car.

Example two: establish car mass M=2000Kg, 120 kilometers of speed per hours, the angle of brake shoe brake cheek 1 establish that 15(roadlice assembling is local limited can only be with low-angle brake shoe brake cheek 1) per second speed U=1000M * 120 ÷, 3600 S=33, impulse force FM=2000Kg * 33 that produce during the 33M/S brake, 33 ÷ 2=33333KgF2=M * U3=2000Kg * 0, the skid resistance that 71=1420Kg(is original) former braking distance=FM/F2=33333Kg ÷ 1420Kg=23,5M F3=M * Sin15=2000Kg * 0, the 26=520Kg(sliding force) F3 '=F3U=520Kg * 33, sliding force when 33M/S=17332Kg(F3 ' car has speed) FX '=MCOS15U=2000Kg * 0,96 * 33,33=63993Kg

F1 ' during personal new brake system

F1 '=63993Kg * 0,02+17332=18611Kg consume impulse force FM '=F ,+F2+F3

FM '=186.11Kg+1420Kg+520Kg=20551Kg ratio=FM/FM '=33333Kg ÷ 20551Kg=1,62 braking distances=23,5M-23,5M ÷ 1,62=8,99M

New and old brake system is united the F1 when using "

F1”＝FX’×（U2＋F3’）

F1”＝63993Kg×0、2＋17332Kg＝30130Kg

Consume impulse force FM altogether "=F "+F2+F3

FM”＝30130Kg＋1420＋520＝32070Kg

Ratio=FM/FM=33333Kg ÷ 32070Kg=1,04

Braking distance=23,5M-(23,5M ÷ 1,01)=0,9M

Prove thus: the big more effect Yu Jia of the angle of brake shoe brake cheek 1, but surpassing 30 degree, angle Da Yi is out of control, and the excessive weight of volume is also in increase simultaneously.

The installation situation of Fig. 2, expression automobile brake shoe brake cheek when normal condition, at this moment brake shoe brake cheek (1) is fixing with dead bolt (8), and its tire (14) is maintained a certain distance.

Fig. 3, be drg condition of service scheme drawing.

Among Fig. 3, retracing spring (9) is sleeved on dead bolt (8) outside, one end of latch (8) is connected with the brake pedal of newly establishing (20) through two pulleys (10) with transmission rope (11), the other end of latch (8) is inserted in again in the hole (3) of brake shoe brake cheek (1), after depressing the brake pedal of newly establishing (20), under the effect of pulling force, make transmission rope 11 through pulley (10), dead bolt 8 is pulled out from the hole (3) of brake shoe brake cheek (1), because the effect of spring (6), brake shoe brake cheek (1) is spurred inwards, and spring (3) is the retracing spring of latch (8).

Fig. 4 is the scheme drawing of brake process, spacing in the drawings rope (13) links to each other with brake shoe brake cheek (1), because the mechanism of Fig. 3 just makes brake shoe brake cheek (1) have erose bumping surface (16) and (Figure 12) tightly holds tightly with tire (14), in next rolling forward together of effect of impulse force.

Accompanying drawing 5 is scheme drawings that braking automobile stops, in Fig. 4, under the effect of impulse force FM, brake shoe brake cheek (1) and tire (14) are rolled forward, and till spacing rope (13) was straightened, at this moment tire (14) just stopped to roll with brake shoe brake cheek, in accompanying drawing 1, can see F ', (F ") the former brake function of braking effect termination generation, just with road surface swiping resistance F2.

Fig. 6 is pedal position figure, and the new brake pedal of newly establishing among the figure (20) is contained in the 2nd position that begins from a left side, and its left side is pedal of clutch (21), and the right side is original brake pedal (22), and Das Gaspedal (23) is contained in the rightest position.

Fig. 7 is the scheme drawing of the later instrument that resets of brake, turnbuckle sleeve (27) is that the turnbuckle latch (26) that matches with wheel shaft (29) (accompanying drawing 9) is to match with the hole (3) on the brake shoe brake cheek (1), sleeve (27) and latch (26) all are screwedly mounted on screw and adjust above the screw rod (28), adjust to and make sleeve (27) can be inserted in wheel shaft (29), latch (26) can insert the hole (3) on the brake shoe brake cheek (1), by removing the middle tetragonal body partly of sub-turn screw rod (28), just can reset then.

Accompanying drawing 8 is structural representations of bi-directional braking hoof, the upper left corner of bi-directional braking hoof (24) porose (4), one end of spacing rope (13) just is fixed on this hole (4), the stage casing is put in pulley (25), retracing spring (6) is housed on the slide rail (5), slide rail (5) is connected with garden arc connector (36) and is integral, and there is lock hole (3) at its middle part, and each is connected the two ends of attaching parts (41) with brake shoe brake cheek 24.

Accompanying drawing 9 is site plan of automobile tire and brake shoe brake cheek when not braking, when not braking among the figure, brake shoe brake cheek is not held tire (14) tightly, brake shoe brake cheek is a cattle horn shape, it is that brake shoe brake cheek body (1) and brake shoe brake cheek face filler are formed, and filler is the bigger material of friction coefficient, for example: rubber, porose on the brake shoe brake cheek (18) are the widely different commentaries on classics holes of spacing rope (13).

Accompanying drawing 10 is A-A cutaway views of accompanying drawing 9, and filler among the figure (2) is contained in above the brake shoe brake cheek (1), and fixed orifice (4) is arranged on the brake shoe brake cheek (1), is used for fixing spacing rope (13), and hole (18) are the widely different commentaries on classics semicircle holes of spacing rope (13).

The scheme drawing of brake shoe brake cheek when accompanying drawing 11 is the removal tire, retracing spring (6) is contained in the both sides of slide rail (5) outside, the one end is fixed on the sliding shoes (37), the other end is connected on the sliding sleeve (38) of slide rail, leaf spring (19) is to be fixed on below the car chassis, limiting stopper (31) is the element that brake shoe brake cheek is resetted, hitching post (30) is provided in a side of above the car chassis, be used for fixing spacing rope (13), dead bolt (8) just pulls out the hole (3) from brake shoe brake cheek (1) when brake, so brake shoe brake cheek (1) since the effect of spring (6) can spur inwards along slide rail (5), and with tightly obvolvent of tire (14).

Figure 12 is the B-B cutaway view of Figure 11, slip ring (7) is sleeved on above the rear axle beam (17), the edge of slip ring (7) is inlaid in again in the groove of sliding shoes (37), the upper end of slide rail (5) is inserted into again in the groove of sliding sleeve 39, brake shoe brake cheek and sliding sleeve with rivet or screw retention on the body (1) of brake shoe brake cheek, reset, locking is all used hole (3) with brake shoe brake cheek (1), brake shoe brake cheek body (1) is equipped with many fitfull projections (16), it can increase the friction of wheel face and hoof face, band projection (16) has spacing beam (15) in the middle of two faces are arranged, this spacing beam (15) inserts in the middle of the two-wheeled of trailing wheel during brake, so that increase the friction of tire and brake shoe brake cheek (1) inner face, prevent out of control.(front-wheel is a single face)

Figure 13 is the scheme drawing that garden post spring is used in expression instead, mainly is not adopt spring (6) and slide rail (5) in the drawings, uses garden post spring (32) (in order to show spring (32), all the other other parts are represented among the figure) instead.

Figure 14 is the scheme drawing that adopts hydraulic efficiency pressure system, and is fast for reset speed, just removes slide rail (5) and uses hydraulic gear instead, so install Hydraulic Pump and bidirectional electromagnetic valve or hand control valve (HCV) additional on automobile, gives hydraulic pressure jack fuel feeding; After brake, automobile is fallen back brake shoe brake cheek (1) and limiting stopper (31) are leaned on mutually just to jack (34) fuel feeding, brake shoe brake cheek (1) is stretched upwards, reach dead bolt (8) (the also have electric signal) center pillar (36) that matches with the hole (3) of brake shoe brake cheek (1) is connected with brake shoe brake cheek (1), also be to be connected with garden post spring (32), all the other situations are all as preceding constant, after normally resetting, the initial position is got back on the top of jack (35) again.

Accompanying drawing 15 is constructionals drawing of the brake shoe brake cheek of band projection, under the situation of not using spacing rope, can be on original drag hoof dish (45), when casting, increase a projection (44), this projection can be used for limiting the rotation of brake shoe brake cheek (1), and has equally also installed stopping projection (42) and rubber buffer (43) on brake shoe brake cheek (1) additional.

Accompanying drawing 16 is scheme drawings of brake shoe brake cheek, and brake shoe brake cheek (1) has two irregular projections (16), in the middle of the projection (16) spacing beam (15) is arranged, and the lower-left end of projection (16) is equipped with rubber buffer (43), and backing block (42) is arranged on its limit.

Accompanying drawing 17 is scheme drawings of transmission rope, and its wire-core (46) is to be inserted in the band soft and soggy metal tube of protection (47), at this moment can not use pulley system.

Compared with prior art, the utility model emergency brake for automobile has following advantage:

1, simple in structure, braking ability is better.

2, when original brake system is out of control, the use of can meeting an urgent need of this drg, braking distance can reduce over half.

3, new-old system can be united use when brake, make after the brake to skid off distance shorter.

Claims

1, a kind of emergency brake for automobile, the hoof face that it is characterized in that its brake shoe brake cheek (1) is filler (2), the hole (4) of fixed limit rope (13) and the widely different commentaries on classics semicircle hole (18) of spacing fag end are arranged on the brake shoe brake cheek (1), brake shoe brake cheek (1) has 2 bumping surfaces (16), a spacing beam (15) is arranged in the middle of it, retracing spring (6) is contained in sliding sleeve (5) outside, the one end is fixed on the sliding shoes (37), the other end is connected on the sliding sleeve (38) of slide rail, slide rail (5) is connected as a body with garden arc connector (36), there is lock hole (3) at its middle part, each is connected the two ends of this attaching parts (36) with brake shoe brake cheek (1), one end of latch (8) is connected with brake pedal (20) through pulley (10) with transmission rope (11), and the other end is contained in the hole (3) of brake shoe brake cheek (1).

2, drg according to claim 1 is characterized in that transmission rope can be that wire-core (46) is inserted into and has in the metallic hose (47) of protecting skin.

3, drg according to claim 1 is characterized in that being cast with projection (44) on the hoof dish (45) of former brake shoe brake cheek, and backing block (42) and rubber buffer (43) are housed on the brake shoe brake cheek (1).