CN104554218B - Motor vehicle mechanical braking formula back axle - Google Patents

Motor vehicle mechanical braking formula back axle Download PDF

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Publication number
CN104554218B
CN104554218B CN201510033481.0A CN201510033481A CN104554218B CN 104554218 B CN104554218 B CN 104554218B CN 201510033481 A CN201510033481 A CN 201510033481A CN 104554218 B CN104554218 B CN 104554218B
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brake
arm
vehicle
hinged
axle
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CN104554218A (en
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李邦华
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李邦华
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/04Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting mechanically
    • B60T11/08Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting mechanically providing variable leverage

Abstract

The invention discloses a kind of motor vehicle and electric motor car mechanical brake type back axle, including jack shaft, bridge tube afterwards, braking device, wheel hub, steady brace, steady brace seat, bracket arm and handler, jack shaft is located in rear bridge tube, braking device includes shoe sole, camshaft, brake arm and two brake shoes, brake shoe is located on shoe sole, brake shoe is provided with brake block, camshaft is located between two brake shoes, and camshaft is rotated with shoe sole and is connected, camshaft is detachably connected with brake arm, shoe sole is located at back axle tube end, steady brace seat is located on rear bridge tube, steady brace is hinged with steady brace seat, bracket arm is hinged with handler, bracket arm is detachably connected with brake arm, brake arm is provided with multiple connecting holes.There is brake arduously instant invention overcomes the back axle of the underloading vehicle of prior art, the uncontrollable defect of effective arm of force of brake arm.

Description

Motor vehicle mechanical braking formula back axle
Technical field
The invention belongs to the back axle field of underloading vehicle, and in particular to after a kind of motor vehicle and electric motor car mechanical brake type Bridge.
Background technology
At present, the brakes of motor vehicle and electric car is divided into propons brake portion and back axle brake portion, two braking The brake modes of the general wheel hub side that rubbed using brake block in part, i.e. two on handlebar brake lever connects propons system respectively Dynamic part and back axle brake portion.During brake, brake lever stops the wheel hub on propons and back axle by wirerope driving brake piece Rotation stop is moved.Because the speed of motor vehicle and electric car is fast, weight is big.Usual vehicle rear occupies the main by weight of vehicle, has Very big inertia, it can be seen that the key of vehicle braking is back axle brake portion.Back axle braking is divided into oil pressure by mode of braking Braking and mechanical braking.Pressurized oil braking is by the feed flow pressure in plunger shaft into the brakes of back axle of the hydraulic station on vehicle body Oil makes piston rod promote brake shoe to expand outwardly the brake block on brake shoe to brake wheel hub, so as to reach back axle braking Effect.Mechanical braking is by wirerope(Or pull bar)Brake arm rotation is driven, so as to realize that camshaft rotates, camshaft makes to stop Car hoof is expanded outwardly so that the brake block on brake shoe is braked to wheel hub.Pressurized oil braking needs individually external hydraulic station To the hydraulic brake system fuel feeding of back axle, cost of manufacture is high.Oil leak is frequently in brake fluid system and maintenance is bothered, brake block mill Trouble is removed and installed when brake block is changed after damage.Mechanical braking is not required to external hydraulic station, and need not consider Leakage, and replacing is stopped It is simple to operate during car piece.Therefore common underloading vehicle generally uses mechanical braking.
Existing underloading vehicle rear axle brakes include drive shaft, rear bridge tube, shoe sole, brake shoe, steady brace, Wheel hub, rear bridge tube is welded with shoe sole, and brake shoe is detachably connected with shoe sole, and brake shoe is provided with brake block, wheel hub It is bolted with drive shaft, and brake block is located in wheel hub.Generally steel plate seat and steady brace are welded with rear bridge tube Seat, steel plate seat is bolted with leaf spring, and rear bridge tube is connected with leaf spring by U-bolt.Leaf spring is leaned on The end of near-car head is slidably connected with vehicle frame, is slided in the chute that the vehicle head end of leaf spring can be on vehicle frame.Leaf spring is leaned on The end of nearly vehicle tail end with vehicle frame with being to be slidably connected, slip in the chute that the vehicle tail end of leaf spring can be on vehicle frame.It is fixed One end of pull bar is connected with the steady brace seat on rear bridge tube by bearing pin, and the other end and vehicle frame of steady brace are also by bearing pin Connection.Vehicle is in brake, and pedal drives bracket arm motion, and bracket arm drives brake arm rotation, brake arm rotating band Moving cam axle rotates, and camshaft expands outwardly brake shoe, so that the brake block on brake shoe is braked to wheel hub.
When vehicle is fully loaded and unloaded, the frictional force needed for brake is different.But the length of the brake arm of prior art is Fixed, i.e., the arm of force is constant in brake process.Vehicle is unloaded and the effective arm of force of full load is inconvenient, it has not been convenient to use.Drive Member is in the vehicle that long-duration driving is fully loaded with, and the dynamics that touches on the brake is larger, but when driving empty-car suddenly, due to the lower meaning of people Know, driver's driving empty-car touches on the brake and also can suddenly touched on the brake as driving during fully loaded vehicle, and vehicle now just occurs Jerk, security incident can be occurred by producing extreme shock.If driver is in the unloaded vehicle of long-duration driving, the dynamics that touches on the brake compared with It is small, but when driving fully loaded vehicle suddenly, due to the subconsciousness of people, the fully loaded vehicle of driver's driving touches on the brake also can be empty as driving Equally gently touched on the brake during carrier vehicle, now just occur that vehicle is stopped incessantly, braking distance is long, it may occur however that the thing such as vehicle rear-end collision Therefore.
Because the individual difference of driver in actual life, comfort level requirement differs during to brake.For example:Ms is due to pin Legpower degree is smaller, relatively elaborate when touching on the brake, when particularly vehicle is heavily loaded, and vehicle brake is, it is necessary to larger brake force.But The length of existing brake arm is to immobilize, and can only increase foot-operated dynamics in brake process to increase braking during brake Power.Different adjustment can not be done for different clients.
Vehicle full load, vehicle frame is pressed downward due to the gravity of goods, the vehicle tail end of leaf spring is slid backward, steel plate bullet The vehicle head end of spring slides forward, realizes the effect of damping, is connected yet with rear bridge tube with steady brace, prevents back axle from being moved back by It is dynamic.Because steady brace and steady brace seat are to be hinged, therefore back axle can relatively rotate with steady brace.The mistake that vehicle frame is pushed Slight twisting occurs for Cheng Zhong, bridge tube after steady brace is held, rear bridge tube.Due to the vehicle frame end of the steady brace of existing underloading vehicle The axial line and the handler end points of bracket arm of bearing pin at point(Both the end points of bracket arm and handler hinged place)Place Bearing pin is not conllinear.The vehicle frame end points of steady brace when vehicle frame is pushed(Both the end points of steady brace and vehicle frame hinged place)Move downward When, by the vehicle frame end points of steady brace(Steady brace and the point of vehicle frame junction), bracket arm handler end points, brake arm Run-on point(Both the point that brake arm is connected with bracket arm)With the strong point of steady brace(Both steady brace was cut with scissors with steady brace seat Contact)Four sides formed are distorted deformation, change the distance between the strong point of steady brace and brake arm run-on point Become(Both bridge tube was twisted after), the angle between brake arm and bracket arm is become big, effective arm of force of brake arm is shortened, So as to influence the brake of vehicle away from making brake away from elongated, influence vehicle safety.
The content of the invention
The technical problem to be solved in the present invention is that the back axle for the underloading vehicle for being directed to prior art has brake arduously, and is stopped The defect of spacing length is laborsaving with braking there is provided a kind of motor vehicle and electric motor car mechanical brake type back axle, brakes away from short spy Point.
In order to solve the above-mentioned technical problem, the present invention provides following technical scheme:Motor vehicle and electric motor car mechanical brake type Back axle, including jack shaft, rear bridge tube, braking device, wheel hub, steady brace, steady brace seat, bracket arm and rotation Handle, the jack shaft is located in rear bridge tube, and the braking device includes shoe sole, camshaft, brake arm and two Brake shoe, the brake shoe is located on shoe sole, and the brake shoe is provided with brake block, and the camshaft is located at two brakes Between hoof, and camshaft is rotated with shoe sole and is connected, and camshaft is detachably connected with brake arm, after the shoe sole is located at Bridge tube end, the steady brace seat is located on rear bridge tube, and the steady brace is hinged with steady brace seat, the bracket arm It is hinged with handler, the bracket arm is detachably connected with brake arm, the brake arm is provided with multiple connecting holes.
Using the motor vehicle and electric motor car mechanical brake type back axle of technical solution of the present invention, including jack shaft, rear bridge tube, Braking device, wheel hub, steady brace, steady brace seat and vehicle-frame seat;Jack shaft provides power to wheel hub, so that wheel Hub rotates.Bridge tube and jack shaft empty set, make rear bridge tube not rotated with jack shaft afterwards.The steady brace and steady brace seat It is hinged, the steady brace is hinged bridge tube after steady brace is held with vehicle-frame seat, prevents that the tailstock is moved rear bridge tube backward.Brake bottom Plate is detachably connected with brake shoe, is convenient for changing the brake block on brake shoe.Brake arm is provided with multiple connecting holes, convenient regulation The pin joint position of bracket arm and brake arm, so as to reach the effective arm of force for changing brake arm, compares province to reach during brake The effect of power.
The present invention operation principle and have the beneficial effect that:During specifically used mechanical brake type back axle, according to the tool of vehicle Connecting hole on body service condition selection brake arm is connected with bracket arm.If the usual bearing goods of vehicle are lighter, stopped in selection During connecting hole on car arm, connecting hole of the selection close to rear bridge tube.If the usual bearing goods of vehicle are heavier, selection is away from back axle The connecting hole of pipe.During brake, bracket arm drives brake arm rotation, and brake arm rotates camshaft, camshaft make brake shoe to Outer expansion, so that the brake block on brake shoe is expanded outwardly, brake block is braked to wheel hub.Bracket arm and brake The connecting hole of diverse location connects more laborsaving during big brake on arm, changes pedal comfort level.Existing brake arm only has One connecting hole, effective arm of force of brake arm is a fixed value, and vehicle is unloaded and the effective arm of force of full load is inconvenient, it has not been convenient to make With.Driver is in the vehicle that long-duration driving is fully loaded with, and the dynamics that touches on the brake is larger, but when driving empty-car suddenly, due to The subconsciousness of people, driver's driving empty-car touches on the brake and also can suddenly touched on the brake as driving during fully loaded vehicle, now will There is vehicle jerk, security incident can be occurred by producing extreme shock.If driver steps on and stopped in the unloaded vehicle of long-duration driving Car dynamics is smaller, but when driving fully loaded vehicle suddenly, due to the subconsciousness of people, the fully loaded vehicle of driver's driving, which touches on the brake, also can Gently touched on the brake as driving during empty-car, now just occur that vehicle is stopped incessantly, braking distance is long, it may occur however that safe thing Therefore.It is full to greatest extent so as to reach that the brake arm of such a structure can adjust effective arm of force of brake arm according to the different demands of client Without too big dynamics when pin steps on brake pedal during sufficient vehicle brake, while also taking into account the pedal stroke range that pin can be born. Relation between the stroke of pedal and foot-operated dynamics is effectively solved according to the individual difference of client.By increasing pedal Braking distance reduce required foot-operated dynamics.
Further, the connecting hole on the brake arm is longitudinally evenly distributed.The company of convenient regulation brake arm and bracket arm Connect, it is to avoid big jump occur when adjusting effective arm of force of brake arm.
Further, the connection hole on the brake arm is provided with location nut.Brake arm is installed when also bracket arm is connected Threaded bearing pin, without separately installed nut, is to install simpler quick.
Further, in addition to anti-rotational pull bar, anti-rotational drag link bearing and vehicle-frame seat, one end of the anti-rotational pull bar with Anti-rotational drag link bearing is hinged, and the other end and the vehicle-frame seat of anti-rotational pull bar are hinged;The anti-rotational drag link bearing is located at brake On bottom plate.Bridge tube, steady brace and anti-rotational pull bar are triangle afterwards, and anti-rotational pull bar is prevented with steady brace collective effect Shoe sole is rotated, it is to avoid rear bridge tube twisting makes the angle between brake arm and bracket arm become big, shortens the effective of brake arm The arm of force, so as to cause the brake of vehicle away from increase.
Further, the anti-rotational drag link bearing is located on shoe sole is located at rear bridge tube instead of anti-rotational drag link bearing On.For anti-rotational drag link bearing and shoe sole welding, anti-rotational drag link bearing is welded with rear bridge tube more to be facilitated.
Further, being hinged for anti-rotational pull bar and vehicle-frame seat uses hinge, the hinge of bracket arm and handler Connect and also use hinge, and the axial line of bearing pin that anti-rotational pull bar is hinged with vehicle-frame seat is hinged with bracket arm with handler The axial line for the bearing pin being hinged is conllinear.Vehicle full load vehicle frame is moved down, and bracket arm surrounds the pin joint of brake arm(Brake arm with The point that bracket arm is hinged)Rotate, rear bridge tube, steady brace and anti-rotational pull bar is triangle is surrounded around anti-rotational pull bar The pin joint of vehicle-frame seat(Both the point that anti-rotational pull bar is hinged with vehicle-frame seat)Axial line rotate, the pin joint of brake arm with it is anti-rotational The relative position of the pin joint of drag link bearing does not change, and does not both occur relative twisting between shoe sole and brake arm.Keep away Self-stopping generation is exempted from.
Brief description of the drawings
Technical solution of the present invention is further illustrated with reference to the accompanying drawings and examples:
Fig. 1 is the structural representation of motor vehicle of the present invention and electric motor car mechanical brake type back axle embodiment;
Fig. 2 is the positive structure schematic of braking device in Fig. 1;
Fig. 3 is Fig. 2 reverse side schematic diagram;
Fig. 4 is the structural representation of embodiment when motor vehicle of the present invention and electric motor car mechanical brake type back axle are connected with vehicle frame Figure.
Reference in figure:Bridge tube after 1- jack shafts, 2-, 3- shoe soles group, 31- shoe soles, 32- brake blocks, 33- camshafts, 34- hinged blocks, 35- brake arms, 36- brake shoes, 37- springs, 4- wheel hubs, 52- steady braces seat, 53- vehicle frames Seat, 61- bracket arms, 62- handlers, the anti-rotational pull bars of 71-, the anti-rotational drag link bearings of 72-, 8- connecting holes, 9- vehicle frames, 10- Leaf spring, power rail 11.
Embodiment
As shown in Figure 1, Figure 2, Figure 3, Figure 4, motor vehicle and electric motor car mechanical brake type back axle, including jack shaft 1, back axle Pipe 2, shoe sole group 3, wheel hub 4, steady brace group, bracket arm group and anti-rotational pull bar group.Steady brace group includes:It is fixed Pull bar 51, steady brace seat 52 and vehicle-frame seat 53.Bracket arm group includes bracket arm 61 and handler 62, bracket arm 61 One end is with brake arm 35 by hinge, and the other end is with handler 62 by hinge, and handler 62 passes through pin with vehicle frame 9 Axle is hinged.Anti-rotational pull bar group includes anti-rotational pull bar 71 and anti-rotational drag link bearing 72, and anti-rotational pull bar 71 is drawn with anti-rotational Rod bearing 72 is by hinge, and anti-rotational pull bar 71 is with vehicle-frame seat 53 by hinge, and vehicle-frame seat 53 is welded with vehicle frame 9, Anti-rotational drag link bearing 72 is welded on shoe sole 31.Jack shaft 1 is located in rear bridge tube 2, and shoe sole group 3 includes brake Bottom plate 31, brake block 32, camshaft 33, hinged block 34, brake arm 35 and two arc brake hoof 36, shoe sole 31 and brake Hoof 36 is connected by hinged block 34, and brake block 32 is connected with brake shoe 36 by bearing pin.Camshaft 33 is located at two brake shoes 36 Between, and camshaft 33 and shoe sole 31 rotate and be connected, provided with spring 37 between brake shoe 36.The two ends of spring 37 connect respectively Connect two brake shoes 36.Camshaft 33 is threadedly coupled with brake arm 35, and rear bridge tube 2 is welded with shoe sole 31.Steady brace 51 With steady brace seat 52 by hinge, steady brace 51 is with vehicle-frame seat 53 by hinge, and vehicle-frame seat 53 is welded on car The bottom of frame 9, steady brace seat 52 is welded with rear bridge tube 2.Aperture of the brake arm 35 provided with three longitudinal arrangements is 10 millimeters Connecting hole 8.
In the specific implementation, the vehicle head end of the leaf spring 10 at underloading vehicle rear axle is slidably connected with vehicle frame 9, steel plate bullet The vehicle tail end of spring 10 is slidably connected with vehicle frame 9.The axial line for the bearing pin that anti-rotational pull bar 71 is hinged with vehicle-frame seat 53 is drawn with brake Bar 61 is conllinear with the axial line for the bearing pin that handler 62 is hinged.Bracket arm 61 and brake arm are adjusted according to the behaviour in service of vehicle 35 connecting hole 8 is hinged.Anti-rotational drag link bearing 72 is integrally formed with shoe sole 31.Vehicle full load, vehicle frame 9 is due to weight Increase is pressed downward, and back axle is moved to tailstock direction, but because steady brace 51 is connected draw-bar seat 52 and vehicle-frame seat 53, is made Obtaining steady brace 51 prevents back axle from being moved to tailstock direction.Bridge tube 2, steady brace 51 and anti-rotational pull bar 71 constitute triangle afterwards Shape.Because the stability of triangle is good.Therefore when vehicle is fully loaded or unloaded, vehicle frame 9 is moved up and down, now leaf spring 10 Two end points chute respectively on vehicle frame 9 in slide, leaf spring 10 is to 9 cushioning effects of vehicle frame.
The axial line for the bearing pin being hinged with vehicle-frame seat 53 due to anti-rotational pull bar 71 is cut with scissors with bracket arm 61 with handler 62 The axial line of the bearing pin connect is conllinear.Therefore during vehicle frame 9 is moved down, bracket arm 61 surrounds the pin joint of brake arm 35(Stop The point that car arm 35 is hinged with bracket arm 61)Rotate, rear bridge tube 2, steady brace 51 and anti-rotational pull bar 71 is triangle encloses Around the pin joint of vehicle-frame seat 53(The point that i.e. anti-rotational pull bar 71 is hinged with vehicle-frame seat 53)Rotate, the pin joint of brake arm 35 is with preventing The relative position of the pin joint of rotating rod bearing 72 does not change, and does not both occur phase between shoe sole 31 and brake arm 35 To twisting.Avoid makes brake arm 35 be in twisted posture because relative twisting occurs for brake arm 35 and shoe sole 31, causes light During braking, there is emergency brake phenomenon, vehicle is produced enormous impact.
During specific brake, power rail drives handler 62 to rotate, and handler 62 drives bracket arm 61 to move so that stopping Car pull bar 61 pulls brake arm 35, makes the relative position between the pin joint of brake arm 35 and the pin joint of anti-rotational drag link bearing 72 Put and change, brake arm 35, which is rotated, rotates camshaft 33, the rotation of camshaft 33 makes brake shoe 36 expand outwardly so that stopping Brake block 32 on car hoof 36, which is expanded outwardly, to be formulated wheel hub 4.After 4 end of braking of wheel hub.Releasing of brake handle, makes rotation Handle 62, brake arm 35, camshaft 33 return to initial position, and brake shoe 36 leans on the elastic force of spring 37, pulls it back initial shape State.
For those skilled in the art, without departing from the structure of the invention, some changes can also be made Shape and improvement, these should also be considered as protection scope of the present invention, these effects and patent for implementing all without the influence present invention Practicality.

Claims (3)

1. motor vehicle mechanical braking formula back axle, including it is jack shaft, rear bridge tube, braking device, wheel hub, steady brace, solid Determine draw-bar seat, bracket arm and handler, the jack shaft is located in rear bridge tube, the braking device includes brake bottom Plate, camshaft, brake arm and two brake shoes, the brake shoe are located on shoe sole, and the brake shoe is provided with brake block, The camshaft is located between two brake shoes, and camshaft is rotated with shoe sole and is connected, and camshaft is detachable with brake arm Connection, the shoe sole is located at back axle tube end, and the steady brace seat is located on rear bridge tube, the steady brace and fixation Draw-bar seat is hinged, and the bracket arm is hinged with handler, and the bracket arm is detachably connected with brake arm, and its feature exists In:The brake arm is provided with multiple connecting holes;Also include anti-rotational pull bar, anti-rotational drag link bearing and vehicle-frame seat, it is described anti- One end of rotating rod is hinged with anti-rotational drag link bearing, and the other end and the vehicle-frame seat of anti-rotational pull bar are hinged;It is described anti-rotational Drag link bearing is located on shoe sole.
2. motor vehicle mechanical braking formula back axle as claimed in claim 1, it is characterised in that:The anti-rotational drag link bearing, which is located at, to be stopped It is located on car bottom plate instead of anti-rotational drag link bearing on rear bridge tube.
3. motor vehicle mechanical braking formula back axle as claimed in claim 1 or 2, it is characterised in that:The anti-rotational pull bar and vehicle frame Being hinged for seat uses hinge, and bracket arm and being hinged for handler also use hinge, and anti-rotational pull bar and vehicle frame The axial line for the bearing pin that seat is hinged is conllinear with the axial line for the bearing pin that bracket arm and handler are hinged.
CN201510033481.0A 2015-01-23 2015-01-23 Motor vehicle mechanical braking formula back axle Active CN104554218B (en)

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CN104554218B true CN104554218B (en) 2017-08-22

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105179532B (en) * 2015-09-30 2018-12-14 重庆帮桦机械制造有限公司 Tricycle braking disc assembly
CN106224418A (en) * 2016-08-31 2016-12-14 广州稻田车辆配件有限公司 A kind of automobile-used brake

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19733552C2 (en) * 1997-08-02 1999-05-27 Daimler Chrysler Ag Brake force distribution gear for a muscle-operated parking brake system
CN2426809Y (en) * 2000-06-14 2001-04-18 成都四兴电子机械有限公司 Rear-wheel driving bridge assembly for light vehicle
CN102837685A (en) * 2012-09-19 2012-12-26 刘承勇 Motor tricycle for realizing parking braking by driving shaft
CN103043043A (en) * 2012-12-29 2013-04-17 诸城市义和车桥有限公司 Trailer bridge assembly
CN204452423U (en) * 2015-01-23 2015-07-08 李邦华 Self-propelled vehicle and electric motor car mechanical brake type back axle

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