CN104828048A - Running brake system and vehicle - Google Patents
Running brake system and vehicle Download PDFInfo
- Publication number
- CN104828048A CN104828048A CN201410490737.6A CN201410490737A CN104828048A CN 104828048 A CN104828048 A CN 104828048A CN 201410490737 A CN201410490737 A CN 201410490737A CN 104828048 A CN104828048 A CN 104828048A
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- Prior art keywords
- axle
- combined cover
- brake
- differential
- assembly
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
- B60T13/16—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
- B60T13/18—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs with control of pump output delivery, e.g. by distributor valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE 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
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/24—Single initiating means operating on more than one circuit, e.g. dual circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
- F16H48/27—Arrangements for suppressing or influencing the differential action, e.g. locking devices using internally-actuatable fluid pressure, e.g. internal pump types
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Retarders (AREA)
Abstract
The invention provides a running brake system and a vehicle. A rear brake loop in the running brake system comprises a second cavity of a mater pump assembly, a central brake assembly, a left differential lock assembly and a right differential lock assembly. When a pedal plate of a brake pedal plate assembly is treaded, the left differential lock assembly and the right differential lock assembly enable a rear axle differential mechanism to lose the differential effect under the hydraulic effect. The running brake system solves the problems that an existing running brake system is poor in heat-fading resistance and reliability, the phenomenon that when the vehicle is braked, due to affected by poor part consistency, large differences exist in brake torque of a left wheel and a right wheel of a rear axle is avoided, and the brake stability is improved.
Description
Technical field
The present invention relates to vehicular field, particularly relate to a kind of service brake and to unify vehicle.
Background technology
Traditional service braking system as shown in Figure 1, comprises left front brake assembly 11, right front brake assembly 12, oil storage cup assembly 13, brake pedal unit 14, total pump assembly 15, pressure-modulation valve assembly 16, left back brake assembly 17 and right back brake assembly 18.
When braking, step on the pedal in brake pedal unit 14, two loops are formed after making the braking liquid be stored in oil storage cup assembly 13 build pressure by total pump assembly 15, total pump assembly 15 has two oil pockets, for convenience of description, below use the first chamber and the second chamber to distinguish 2 chambeies of total pump assembly respectively, wherein, first chamber (also known as ante-chamber) of total pump assembly 15 forms front loop with left front brake assembly 11 and right front brake assembly 12, second chamber (also known as the back cavity) braking liquid of total pump assembly 15 is after pressure-modulation valve assembly 16, rear loop is formed with right back brake assembly 18 with left back brake assembly 17.
Tradition H type arranges that brake system vehicle exists certain defect, and its back axle wheel braking moment when braking exists larger difference by parts consistency problem, and rear brake pipe pressure and lock torque are comparatively greatly, anti-character of heat-fading and reliability poor.
Summary of the invention
The invention provides a kind of service braking system, the vehicle that the is provided with existing service braking system back axle left and right wheels lock torque when braking differ greatly for solving, the problem of anti-character of heat-fading and poor reliability.
The invention provides a kind of service braking system, comprise: brake pedal unit, front brake circuit and rear brake circuit, brake pedal unit is connected with rear brake circuit with front brake circuit respectively, wherein, rear brake circuit comprises: the second chamber of total pump assembly, centre brake assembly, left differential lock assembly and right differential lock assembly;
Second chamber of total pump assembly is connected by brake fluid pipeline with centre brake assembly;
Centre brake assembly connects left differential lock assembly and right differential lock assembly respectively by two-way brake fluid pipeline;
When left differential lock assembly and the pedal of right differential lock assembly in brake pedal unit are operated, under hydraulic action, rear-axle differential is made to lose differential action.
The invention provides a kind of vehicle, this vehicle comprises above-mentioned service braking system.
Beneficial effect of the present invention comprises:
The invention provides a kind of service brake to unify vehicle, relative to prior art, improve rear brake circuit, rear brake circuit comprises: the second chamber of total pump assembly, centre brake assembly, left differential lock assembly and right differential lock assembly; Wherein, second chamber of total pump assembly is connected by brake fluid pipeline with centre brake assembly, centre brake assembly connects left differential lock assembly and right differential lock assembly respectively by two-way brake fluid pipeline, when left differential lock assembly and the pedal of right differential lock assembly in brake pedal unit are operated, under hydraulic action, make rear-axle differential lose differential action, like this, in car brakeing process, make back axle both sides Semi-axle brake moment identical, greatly reduce brake moment and line pressure; Significantly improve anti-character of heat-fading and the reliability of drg; Overcome the anti-character of heat-fading of prior art existence and the problem of poor reliability.
Accompanying drawing explanation
Fig. 1 is that in prior art, brake system structure schematic diagram arranged by traditional H type;
The structural representation of the service braking system that Fig. 2 provides for the embodiment of the present invention;
The integral structure schematic diagram of the centre brake assembly that Fig. 3 provides for the embodiment of the present invention;
The exploded view of the structure of the centre brake assembly that Fig. 4 provides for the embodiment of the present invention;
The part-structure schematic diagram of the rear brake circuit that Fig. 5 provides for the embodiment of the present invention;
Fig. 6 is the partial enlarged drawing of position A in Fig. 5;
Fig. 7 is the partial enlarged drawing of position B in Fig. 5.
Detailed description of the invention
Below in conjunction with Figure of description, the unify detailed description of the invention of vehicle of the service brake provided the embodiment of the present invention is described.
Embodiments provide a kind of service braking system, this system comprises: brake pedal unit 14, front brake circuit and rear brake circuit, brake pedal unit 14 is connected with rear brake circuit with front brake circuit respectively, wherein: the structure of brake pedal unit 14, front brake circuit can with reference to the structure of brake pedal unit 14, front brake circuit in existing service braking system as shown in Figure 1.Unlike the prior art in service braking system provided by the invention, rear brake circuit comprises: the second chamber of total pump assembly 15, centre brake assembly 21, left differential lock assembly 22 and right differential locking-device total 23; Wherein:
Second chamber of total pump assembly 15 is connected by brake fluid pipeline with centre brake assembly 21;
Centre brake assembly 21 connects left differential lock assembly 22 and right differential lock assembly 23 respectively by two-way brake fluid pipeline;
When left differential lock assembly 22 and the pedal of right differential lock assembly 23 in brake pedal unit 14 are operated, under hydraulic action, make rear-axle differential lose differential action, therefore vehicle avoids the one-sided phenomenon of trackslipping of left and right wheels generation different from ground attaching coefficient, and now the speed of left and right wheels, the isoparametric value of moment are identical.
In above-mentioned left differential lock assembly 22 and right differential lock assembly 23, the definition of left and right can be determined with reference to the relation of the position of left and right under normal vehicle using state.
Centre brake assembly 21 in the embodiment of the present invention can adopt the structure of centre brake in prior art, in order to the structure of the service braking system that the embodiment of the present invention provides can be illustrated more clearly in, with a concrete example, it is simply illustrated below:
As shown in Figure 3,4, the structure of centre brake assembly 21 comprises substantially: torque arm 211, base plate 212, push rod 213, bearing pin 214, left brake strap 215, right braking hoof sheet 216, brake cylinder 217, bracing wire 218, brake check spring 219, brake wheel 220 etc.; Wherein:
Be fixed together by bearing pin 214 with right braking hoof sheet 216 on the upside of torque arm 211, downside and bracing wire 218 are fixed together, centre portion often contacts with one end of push rod 213, and the other end of push rod 213 often contacts with left brake strap 215, be fixed on base plate 212 by bearing pin 214 on the downside of left brake strap 215 and right braking hoof sheet 216, the two ends of brake check spring 219 are separately fixed on left brake strap 215 and right braking hoof sheet 216, brake cylinder 217 is between left brake strap 215 upper end and right braking hoof sheet 216 upper end, and brake wheel 220 is connected with base plate 212;
Centre brake assembly 21 is with running braking function and parking braking function, and wherein, the working process of service brake is as follows:
In pipeline, braking liquid enters brake cylinder 217, in brake cylinder 217, brake piston promotes left brake strap 215 and right braking hoof sheet 216 to two lateral movements, until the friction lining outside brake strap contacts with brake wheel 220 and produces rubbing effect, because brake wheel 220 is fixedly connected with back axle input shaft, friction lining and brake wheel 220 will make back axle input shaft to produce a resisting moment after producing and rubbing, again because the driving gear in back axle input shaft and vehicle main retarder is one, the driving gear in main reduction gear is driven to produce resisting moment, driving gear in final main reduction gear will become halted state from rotary state, driven gear in main reduction gear also can become halted state thereupon, thus service brake is achieved, and braking force is directly proportional to line pressure in service braking operation,
The working process of braking during standstill is as follows:
When pulling the hand brake, bracing wire 218 pulls torque arm 211 to rotate centered by bearing pin 214, promote left brake strap 215 by push rod 213 to move, simultaneously torque arm 211 by with push rod 213 contact position centered by rotation forces right braking hoof sheet 216 move, and when tube voltage drop is low or bracing wire 218 loosens, left brake strap 215 and right braking hoof sheet 216 meeting return under the effect of brake check spring 219.
Certainly, the centre brake assembly 21 of the service braking system that the embodiment of the present invention provides is not limited to the structure shown in above-mentioned Fig. 3,4, as long as the structure that can realize controlling the function of the piston in left and right wheel cylinder by hydraulic oil pipeline all can, the embodiment of the present invention does not limit this.
Further, as shown in Fig. 5,6,7, right differential lock assembly 23 comprises: part pump 231, right pull back spring 232 and right combined cover 233 on the right side, one end of right pull back spring 232 is fixed on the housing of rear-axle differential, the other end is fixed on right combined cover 233, on the housing that right combined cover 233 is socketed on rear-axle differential slidably and right combined cover 233 relative to the housing locking in circumferential direction of rear-axle differential;
Composition and the right differential locking-device 23 of left differential lock assembly 22 are similar, comprise: part pump 221, left pull back spring 222 and left combined cover 223 on the left side, one end of left pull back spring 222 is fixed on the housing of rear-axle differential, the other end is fixed on left combined cover 223, on the housing that left combined cover 223 is socketed on rear-axle differential slidably and left combined cover 223 relative to the housing locking in circumferential direction of rear-axle differential;
The above-mentioned pump 221 that parts on the left side can be determined with reference to the relation of the position of left and right under normal vehicle using state with the definition parting left and right in pump 231 on the right side;
Similarly, in above-mentioned left pull back spring 222 and right pull back spring 232, the definition of left and right can be determined with reference to the relation of the position of left and right under normal vehicle using state;
Similarly, in above-mentioned left combined cover 223 and right combined cover 233, the definition of left and right also can be determined with reference to the relation of the position of left and right under normal vehicle using state.
In general, when the pedal in brake pedal unit 14 is not stepped on, left pull back spring 222 and right pull back spring 232 are all in free state, and they do not produce application force to the left combined cover 223 be attached thereto and right combined cover 233.When pedal in brake pedal unit 14 is operated, under hydraulic action, part pump 231 on the right side to promote right combined cover 233 and slide to the right, obviously, now that one end of being fixed on the housing of rear-axle differential of right pull back spring 232 is motionless, slide to the right with right combined cover 233 in that one end be fixed on right combined cover 233, right pull back spring 232 becomes extended state from free state, but the pulling force of right pull back spring 232 to right combined cover 233 is less than and parts pump 231 on the right side and act on thrust on right combined cover 233, so the direction of slip of right combined cover 233 is with parting pump 231 on the right side, to act on the direction of the thrust on right combined cover 233 consistent, when right combined cover 233 is when the combined action lower slider parting pump 231 thrust and these 2 power of spring tension on the right side is to ad-hoc location, will combine with back axle right axle shaft, and right combined cover 233 is relative to back axle right axle shaft locking in circumferential direction, same reason, part pump 221 on the left side to promote left combined cover 223 and slide left, thus combine with back axle left half axle, and left combined cover 223 is relative to back axle left half axle locking in circumferential direction.In addition, because the piston end surface of 2 in differential locking-device often contacts with corresponding combined cover respectively, as long as therefore the pedal in brake pedal unit 14 is operated, under hydraulic action, in a short period of time, piston in the wheel cylinder of left and right just can start, and promotes left and right combined cover and slides, brake system is worked rapidly.
When pedal in brake pedal unit 14 unclamps, hydraulic action reduces gradually, namely part pump 231 on the right side to act on thrust on right combined cover 233 and part the thrust that pump 221 acts on left combined cover 223 on the left side and reduce gradually, when the thrust at this place is reduced to particular value, under the thrust of wheel cylinder and the combined action of spring force, left pull back spring 222 and right pull back spring 232 resilience, right combined cover 233 is driven to depart from back axle right axle shaft, drive left combined cover 223 to depart from back axle left half axle simultaneously, back axle left half axle and back axle right axle shaft separate with the housing of rear-axle differential simultaneously, no longer lock is integrated, now rear-axle differential recovers its normal differential function.
Further, the oil outlet of the brake cylinder 217 in centre brake assembly 21 by brake fluid pipeline respectively with part pump 221 on the left side and part pump 231 oil inlet on the right side and be connected, above-mentioned brake fluid pipeline can adopt Y-shaped pipeline as shown in Figure 5, braking liquid in brake cylinder 217 is divided into two-way through Y-shaped pipeline, flow into respectively and part pump 221 on the left side and part pump 231 on the right side, promoted the piston movement parting pump 221 on the left side and part on the right side in pump 231 by hydraulic action respectively.
Further, in the sleeve of left combined cover 223 and right combined cover 233, there is inner spline gear, the housing of simultaneously rear-axle differential has gear, left combined cover 223 and right combined cover 233 often engage with the gear on the housing of rear-axle differential respectively by inner spline gear, and on combined cover, the number of teeth of inner spline gear is identical with the number of teeth that the housing of rear-axle differential cogs or not identical.
Further, when the pedal of brake pedal unit 14 is operated, why right axle shaft can combine with right combined cover 233 is because back axle right axle shaft band gear, under hydraulic action, gears meshing on one end of right combined cover 233 inner spline gear and the housing of rear-axle differential, the other end and back axle right axle shaft are near right combined cover 233 place gears meshing.Once the right combined cover 233 inner spline gear gear simultaneously with back axle right axle shaft on the housing of right combined cover 233 place's gear and rear-axle differential engages well, firmly and reliably will combine very much between right axle shaft and right combined cover 233, achieve the locking of the housing of right axle shaft and rear-axle differential.Similarly, the left combined cover 223 inner spline gear gear simultaneously with back axle left half axle on the housing of left combined cover 223 place's gear and rear-axle differential engages well, achieves the locking of the housing of left half axle and rear-axle differential.
Further, back axle right axle shaft is provided with boss, when this boss combines with back axle right axle shaft for right combined cover 233, carries out spacing in axial direction to right combined cover 233.
Back axle left half axle is also provided with boss, when this boss combines with back axle left half axle for left combined cover 223, carries out spacing in axial direction to left combined cover 223.
The above-mentioned reason arranging boss design on back axle right axle shaft is (principle of the boss on back axle left half axle is similar):
If this boss is not spacing to it, inner spline gear then on right combined cover 233 and back axle right axle shaft are after the gears meshing at right combined cover 233 place, right combined cover 233 may continue to jump to the right under the thrust parting piston in pump 231 on the right side, so that inner spline gear on right combined cover 233 and the gear of back axle right axle shaft near right combined cover 233 place cannot engage the combination realizing both well.
Further, as shown in Figure 2, service braking system provided by the invention also comprises: pressure-modulation valve assembly 16, and pressure-modulation valve assembly 16 is between second chamber and centre brake assembly 21 of total pump assembly 15.Pressure-modulation valve assembly 16 can regulate the pressure of hydraulic oil in centre brake assembly 21 preferably, and when car brakeing is slowed down, in centre brake assembly 21, the different pressures of hydraulic oil can adapt to the vehicle speed different when slowing down.
Further, the second chamber of total pump assembly 15 is connected with pressure-modulation valve assembly 16 oil inlet by brake fluid pipeline, and pressure-modulation valve assembly 16 oil outlet connects centre brake assembly 21 oil inlet by brake fluid pipeline;
Although whole brake fluid pipeline seems only to play the function connecting service braking system each several part, but in fact, concerning this service braking system, brake fluid pipeline is a very important part, because combined cover is combined with semiaxis thus the thrust that the function making diff lose differential action must rely on the braking liquid in brake fluid pipeline to produce can realize in this system.
Further, differential locking-device is parted on the right side pump 231 and parts pump 221 on the left side with differential locking-device and can be fixedly connected with by connection modes such as bolts with the housing of rear-axle differential respectively, and the embodiment of the present invention does not limit this.
The service braking system that the embodiment of the present invention provides has 2 kinds of states in the specific implementation: after stepping on the pedal in brake pedal unit 14, be stored in braking liquid in oil storage cup through total pump assembly 15 formed respectively front brake circuit and after brake circuit.Centre brake assembly 21 now in brake circuit starts to work and makes car brakeing, simultaneously, under the effect of hydraulic pressure, the piston parted on the left side in pump 221 of the left differential lock assembly 22 that centre brake assembly 21 connects promotes left combined cover 223 and slides to back axle left half axle, the piston parted on the right side in pump 231 of the right differential lock assembly 23 that centre brake assembly 21 connects promotes right combined cover 233 and slides to back axle right axle shaft, back axle left half axle and left combined cover 223 is finally made to be combined by the mode of gears meshing, make back axle right axle shaft and right combined cover 233 be combined by the mode of gears meshing simultaneously, now back axle left half axle and back axle right axle shaft are just locked with the housing of rear-axle differential simultaneously and are integrated, back axle left half axle is identical with the lock torque of back axle right axle shaft, the synchro of differential locking-device starts to work, therefore rear-axle differential loses its differential action,
Once the pedal in brake pedal unit 14 is released, hydraulic action will reduce gradually until disappear, left combined cover 223 slides to the direction away from back axle left half axle gradually under the effect of left pull back spring 222, right combined cover 233 slides to the direction away from back axle right axle shaft under the effect of right pull back spring 232 simultaneously, left pull back spring 222 and right pull back spring 232 is finally made all to be returned to its original free elongation state, now back axle left half axle and back axle right axle shaft are no longer locked with the housing of rear-axle differential and are integrated, and rear-axle differential still can exercise its differential function.
The service braking system that the embodiment of the present invention provides solves the problem of the anti-character of heat-fading of existing service braking system and poor reliability, when avoiding automobile brake there is larger difference by parts conformability difference problem in back axle left and right wheels lock torque, improves the stability of braking.
Present invention also offers a kind of vehicle, this vehicle comprises above-mentioned service braking system.
The vehicle that the embodiment of the present invention provides can be passenger vehicle, engineering truck, truck, car etc. in the specific implementation, and the embodiment of the present invention does not limit this.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a service braking system, comprise: brake pedal unit (14), front brake circuit and rear brake circuit, described brake pedal unit (14) is connected with described rear brake circuit with described front brake circuit respectively, it is characterized in that, described rear brake circuit comprises: the second chamber of total pump assembly (15), centre brake assembly (21), left differential lock assembly (22) and right differential lock assembly (23);
Second chamber of described total pump assembly (15) is connected by brake fluid pipeline with described centre brake assembly (21);
Described centre brake assembly (21) connects described left differential lock assembly (22) and described right differential lock assembly (23) respectively by two-way brake fluid pipeline;
When described left differential lock assembly (22) and the pedal of described right differential lock assembly (23) in described brake pedal unit (14) are operated, under hydraulic action, rear-axle differential is made to lose differential action.
2. service braking system as claimed in claim 1, it is characterized in that, described right differential lock assembly (23) comprising: part pump (231) on the right side, right pull back spring (232) and right combined cover (233), one end of described right pull back spring (232) is fixed on the housing of described rear-axle differential, the other end is fixed on described right combined cover (233), on the housing that described right combined cover (233) is socketed on described rear-axle differential slidably and described right combined cover (233) relative to the housing locking in circumferential direction of described rear-axle differential,
Described left differential lock assembly (22) comprising: part pump (221), left pull back spring (222) and left combined cover (223) on the left side, one end of described left pull back spring (222) is fixed on the housing of described rear-axle differential, the other end is fixed on described left combined cover (223), on the housing that described left combined cover (223) is socketed on described rear-axle differential slidably and described left combined cover (223) relative to the housing locking in circumferential direction of described rear-axle differential;
The described pump (231) that parts on the right side is when being operated for the pedal in described brake pedal unit (14), under hydraulic action, drive described right combined cover (233) and back axle right axle shaft to combine, described right combined cover (233) is relative to described back axle right axle shaft locking in circumferential direction;
The described pump (221) that parts on the left side is when being operated for the pedal in described brake pedal unit (14), under hydraulic action, drive described left combined cover (223) and back axle left half axle to combine, described left combined cover (223) is relative to described back axle left half axle locking in circumferential direction;
When pedal in described brake pedal unit (14) unclamps, described right pull back spring (232) and described left pull back spring (222) resilience, make described right combined cover (233) depart from described back axle right axle shaft, and described left combined cover (223) depart from described back axle left half axle.
3. service braking system as claimed in claim 2, it is characterized in that, described centre brake assembly (21) comprises a brake cylinder (217), and described brake cylinder (217) oil outlet is connected with the described oil inlet parting pump (231) on the right side with the described pump (221) that parts on the left side respectively by brake fluid pipeline.
4. service braking system as claimed in claim 2, it is characterized in that, in the sleeve of described left combined cover (223) and described right combined cover (233), there is inner spline gear, the housing of described rear-axle differential has gear, and described left combined cover (223) and described right combined cover (233) often engage with the described gear on the housing of described rear-axle differential respectively by described inner spline gear.
5. service braking system as claimed in claim 4, it is characterized in that, described back axle left half axle is near described left combined cover (223) place band gear, and described back axle right axle shaft is near described right combined cover (233) place band gear;
When pedal in described brake pedal unit (14) is operated, described gears meshing on one end of described left combined cover (223) inner spline gear and the housing of described rear-axle differential, the other end and described back axle left half axle are near described left combined cover (223) place gears meshing;
Described gears meshing on one end of described right combined cover (233) inner spline gear and the housing of described rear-axle differential, the other end and described back axle right axle shaft are near described right combined cover (233) place gears meshing.
6. service braking system as claimed in claim 2, it is characterized in that, described back axle right axle shaft is provided with boss, when this boss combines for described right combined cover (233) and described back axle right axle shaft, carry out spacing in axial direction to described right combined cover (233);
Described back axle left half axle is provided with boss, when this boss combines for described left combined cover (223) and described back axle left half axle, carries out spacing in axial direction to described left combined cover (223).
7. service braking system as claimed in claim 2, is characterized in that, described differential locking-device parts pump (231) and described differential locking-device on the right side and parts the mode that pump (221) is bolted with the housing of described rear-axle differential respectively on the left side and be fixedly connected with.
8. the service braking system as described in any one of claim 1-7, it is characterized in that, also comprise: pressure-modulation valve assembly (16), between the second chamber that described pressure-modulation valve assembly (16) is positioned at described total pump assembly (15) and described centre brake assembly (21).
9. service braking system as claimed in claim 8, it is characterized in that, the second chamber of described total pump assembly (15) is connected with described pressure-modulation valve assembly (16) oil inlet by brake fluid pipeline;
Described pressure-modulation valve assembly (16) oil outlet connects described centre brake assembly (21) oil inlet by brake fluid pipeline.
10. a vehicle, is characterized in that, comprises the service braking system as described in any one of claim 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410490737.6A CN104828048B (en) | 2014-09-23 | 2014-09-23 | A kind of service braking system and vehicle |
| PCT/CN2015/088775 WO2016045486A1 (en) | 2014-09-23 | 2015-09-01 | Running brake system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410490737.6A CN104828048B (en) | 2014-09-23 | 2014-09-23 | A kind of service braking system and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104828048A true CN104828048A (en) | 2015-08-12 |
| CN104828048B CN104828048B (en) | 2018-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410490737.6A Active CN104828048B (en) | 2014-09-23 | 2014-09-23 | A kind of service braking system and vehicle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104828048B (en) |
| WO (1) | WO2016045486A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016045486A1 (en) * | 2014-09-23 | 2016-03-31 | 北汽福田汽车股份有限公司 | Running brake system and vehicle |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106740079B (en) * | 2017-03-20 | 2023-08-01 | 山东精科智能传动设备股份有限公司 | Transmission system of front and rear axle assemblies of gearbox of plant protection machine |
| CN113830050A (en) * | 2021-10-25 | 2021-12-24 | 丁国林 | Brake system and five-wheel vehicle |
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| WO2016045486A1 (en) * | 2014-09-23 | 2016-03-31 | 北汽福田汽车股份有限公司 | Running brake system and vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016045486A1 (en) | 2016-03-31 |
| CN104828048B (en) | 2018-06-19 |
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