CN208291203U - A kind of active trailer brake system - Google Patents
A kind of active trailer brake system Download PDFInfo
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- CN208291203U CN208291203U CN201820675640.6U CN201820675640U CN208291203U CN 208291203 U CN208291203 U CN 208291203U CN 201820675640 U CN201820675640 U CN 201820675640U CN 208291203 U CN208291203 U CN 208291203U
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- trailer
- valve
- tractor
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- control unit
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Abstract
The utility model discloses a kind of active trailer brake system, including 15 core electric connectors (1), coupling member (2), electronic control unit (3), hydraulic system (4) and battery (5)；The signal input part of the electronic control unit (3) is connected with the signal output end of coupling member (2) and 15 core electric connectors (1), the signal output end of electronic control unit (3) is connected with the signal input part of hydraulic system (4), the power output end of the 15 core electric connector (1) is connected with the power input of battery (5) and hydraulic system (4) respectively, and the power output end of battery (5) is connected with the power input of electronic control unit (3) and hydraulic system (4) respectively.The active trailer brake system of the utility model, brake it is sensitive, reversing when brakeless and braking characteristic it is adjustable.
Description
Technical field
The utility model belongs to brake system of car technical field, especially it is a kind of braking it is sensitive, reversing when brakeless and
The adjustable active trailer brake system of braking characteristic.
Background technique
For the tractor for cooperating different form braking system, domestic and international trailer brake system generally uses inertia braking system
System.
Inertial braking system is divided into mechanical type inertia braking system and fluid pressure type inertial braking system again.
Mechanical type inertia brake system structure is simple, and braking can change with tractor braking deceleration and generate corresponding system
Power.Chinese invention patent application " trailer " (application number: 200810054115.3, publication date: 2010.09.08) disclose one
Kind mechanical type inertia braking system is generated the thrust to trailer towing ring, pushes traction mechanism backward when being braked using tractor
Movement, while pivoted arm being driven to be allowed to rotate；The pivoted arm other end pull brake cable make brake brake-shoe open and with braking
Drum friction, generates brake force.But the mechanical type inertia brake system efficiency is low, has certain hysteresis quality, is easy to appear
It breaks away, brake coordination is poor, is also easy to produce braking impact.
Fluid pressure type inertial braking system structure is relative complex, as Chinese utility model patent application " has and hits braking work
The trailer fluid power impact braking system of energy " (application number: 201120269388.7, publication date: 2012.05.09), American invention is special
Benefit application " Surge brake actuator " (application number: 14/196304, publication date: 2015.08.13).Both use
Fluid pressure type inertial braking system.When tractor braking, speed is reduced, and trailer is due to inertia, and instantaneous velocity remains unchanged, and makes
It hits, is moved after causing tractor hook to push trailer towing circumferential, in turn at tractor draw hook and trailer towing ring
The push rod of hydraulic main cylinder is hit, impact force is converted into hydraulic coupling and pushes the braking of wheel cylinder by brake piping by push rod
Hoof makes brake.But the braking of this fluid pressure type inertial braking system is insensitive；It is such as braked in turning, easily causes extension
Roof opens the phenomenon that tractor；And fluid pressure type inertia braking is pure mechanic structure, braking characteristic can not be adjusted.
And no matter for above-mentioned mechanical type inertia braking system or fluid pressure type inertial braking system, when tractor reversing,
Can inertia impact be caused to trailer, so that trailer be made to generate braking and can not move backward.To solve this problem, general at present to do
Method includes: 1, before reversing, with reversing pin by inertia braking device locking, is then moved backward again.This method is excessively cumbersome；2,
The brake automatically terminated using reversing braking, such as the Chinese utility model patent application " system of band brake hoof reverse loosing mechanism
Dynamic device " (application number: 200820075951.5, publication date: 2009.07.01) a kind of small trailer drum brake is disclosed,
Braking is automatically terminated when reversing, and can restore inertia braking automatically when advancing, and solving inertial braking system trailer cannot
The problem of automatic backing.But this method need to develop brake again, and brake can only be acted in lesser reversing braking moment
Under move backward, can not move backward under steep gradient or severe duty.
In short, problem of the existing technology is: trailer braking protection valve is insensitive, there is certain hysteresis quality；There is system when reversing
Kinetic moment is unable to satisfy under steep gradient or severe duty requirement of moving backward；Braking characteristic can not be adjusted.
Summary of the invention
The purpose of this utility model is that propose a kind of active trailer brake system, brakeless when braking sensitive, reversing
And braking characteristic is adjustable.
Realize the technical solution of the utility model aim are as follows:
A kind of active trailer brake system, comprising:
15 core electric connectors 1, for the electrical connection between tractor and trailer；
Coupling member 2, for the mechanical connection between tractor and trailer；
Electronic control unit 3, for receiving the signal of 15 core electric connectors 1 and coupling member 2, issue corresponding command signal to
Hydraulic system 4 executes；
Hydraulic system 4, the executing agency for trailer braking protection valve；
Battery 5, for powering for electronic control unit 3 and hydraulic system 4；
The signal input part of the electronic control unit 3 is connected with the signal output end of the core of coupling member 2 and 15 electric connector 1,
The signal output end of electronic control unit 3 is connected with the signal input part of hydraulic system 4, the power supply output of the 15 core electric connector 1
End be connected respectively with the power input of battery 5 and hydraulic system 4, the power output end of battery 5 respectively with electronic control unit 3
It is connected with the power input of hydraulic system 4.
The utility model compared with prior art, remarkable advantage are as follows:
1, it brakes sensitive: active trailer brake system is used, when receiving tractor brake signal or displacement sensor
It detects and is braked immediately after relative displacement changes between tractor and trailer, avoid the hysteresis quality of inertia braking, simultaneously
Braking impact is significantly reduced, the ride comfort in tractor drawbar trailer traveling is improved.
2, brakeless when moving backward: when receiving tractor astern signal, trailer will not be braked, and avoid inertia braking system
When system reversing the problem of triggering braking, and operation bidirectional is not needed.
3, braking characteristic is adjustable: using electronic control, braking reliability is high, and braking characteristic is adjustable.
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Detailed description of the invention
Fig. 1 is the structural block diagram of the active trailer brake system of the utility model, and dotted line is signal wire, and solid line is power supply
Line.
Fig. 2 is the working principle diagram of coupling member in Fig. 1.
Fig. 3 is the working principle diagram of hydraulic system in Fig. 1, and dotted line is electric signal, and solid line is fluid pressure line.
In figure, 15 core electric connectors 1, coupling member 2, electronic control unit 3, hydraulic system 4, battery 5；
Trailer towing ring 21, link block 1, link block 2 23, displacement sensor 24, limit spring 25, emergency braking dress
Set 26；
Fluid reservoir 41, electric hydraulic pump 42, check valve 43, high pressure accumulator 44, pressure reducing valve 45, liquid feed valve 46, liquid valve
47, hydrostatic sensor 48, wheel cylinder 49.
Specific embodiment
As shown in Figure 1, the active trailer brake system of the utility model, comprising:
15 core electric connectors 1, for the electrical connection between tractor and trailer；
Coupling member 2, for the mechanical connection between tractor and trailer；
Electronic control unit 3, for receiving the signal of 15 core electric connectors 1 and coupling member 2, issue corresponding command signal to
Hydraulic system 4 executes；
Hydraulic system 4, the executing agency for trailer braking protection valve；
Battery 5, for powering for electronic control unit 3 and hydraulic system 4；
The signal input part of the electronic control unit 3 is connected with the signal output end of the core of coupling member 2 and 15 electric connector 1,
The signal output end of electronic control unit 3 is connected with the signal input part of hydraulic system 4, the power supply output of the 15 core electric connector 1
End be connected respectively with the power input of battery 5 and hydraulic system 4, the power output end of battery 5 respectively with electronic control unit 3
It is connected with the power input of hydraulic system 4.
As shown in Fig. 2,
The coupling member 2 includes trailer towing ring 21, link block 1, link block 2 23, displacement sensor 24, limit
Spring 25 and emergency braking apparatus 26；
Described one 22 one end of link block is fixedly connected with trailer towing ring 21, and the other end can slidingly be nested in connection
In block 2 23；
24 one end of institute's displacement sensors is fixedly connected with link block 1, and the other end is fixedly connected with link block 2 23；
The limit spring 25 is placed in 2 23 inside of the end that link block 1 is nested in link block 2 23 and link block
Limited block between；
The emergency braking apparatus 26 is fixed on 2 23 top of link block, steel wire pull line one end and the tractor phase of extraction
Even, the other end is connected with trailer parking brake cable；
The signal output end of institute's displacement sensors 24 is connected with the signal input part of electronic control unit 3.
It is provided according to " electric connector 24V15 core pattern between GB/T 20717-2006 road vehicle tractor and trailer ": 15
The contact 7 of core electric connector 1 is tractor brake signal output end, and contact 8 is tractor astern signal output end, they are divided
Be not connected with the signal input part of electronic control unit 3, in addition, the signal input part of the electronic control unit 3 also with the coupling member 2
In 24 signal output end of displacement sensor be connected.
Preferably, the signal output end of the 15 core electric connector 1 includes tractor brake signal output end and tractor
Astern signal output end.
As shown in figure 3, the hydraulic system 4 includes fluid reservoir 41, electric hydraulic pump 42, check valve 43, high pressure accumulator
44, pressure reducing valve 45, liquid feed valve 46, liquid valve 47, hydrostatic sensor 48 and wheel cylinder 49；
The fluid reservoir 41, electric hydraulic pump 42, check valve 43, liquid feed valve 46, wheel cylinder 49 are sequentially connected in series with pipeline, wheel cylinder
49 are also sequentially connected in series with liquid valve 47, fluid reservoir 41 with pipeline, the pipeline and check valve 43 and liquid feed valve 46 of high pressure accumulator 44
Between pipeline communicate, the inlet of 45 1 end Jie electric hydraulic pump 42 of pressure reducing valve, another feed liquor for terminating at liquid feed valve 46
Mouthful, hydrostatic sensor 48 is placed among the pipeline that liquid feed valve 46 is connected with wheel cylinder 49；
The control terminal of the electric hydraulic pump 42, liquid feed valve 46 and liquid valve 47 signal with the electronic control unit 3 respectively
Output end is connected；
The power output end of the power input of the electric hydraulic pump 42 and the 15 core electric connector 1 and battery 5
It is connected.
Preferably, liquid feed valve 46 and liquid valve 47 can be bi-bit bi-pass normally closed solenoid valve.
Because of trailer passive delivery, according to " electric connector between GB/T 20717-2006 road vehicle tractor and trailer
24V15 core pattern " regulation: 15 core electric connector, 1 contact 9 be 24V continued power power output end, by its respectively with battery 5 and
The power input of hydraulic system 4 is connected, by the power output end of battery 5 electricity with electronic control unit 3 and hydraulic system 4 respectively
Source input terminal is connected.When trailer does not need braking in driving process, 15 core electric connectors 1 charge to battery 5；Trailer needs to make
When dynamic, 15 core electric connectors 1 and battery 5 are powered to hydraulic system 4 simultaneously.
The working principle of the utility model is as follows:
When tractor is braked, electronic control unit 3 receives tractor brake signal and displacement transducer signal, drives electronic liquid
Press pump 42 and liquid feed valve 46, the high-pressure brake liquid in high pressure accumulator 44 complete trailer system to the pressurization of wheel cylinder 49 through liquid feed valve 46
It is dynamic.
Tractor braking, the tractor brake signal output end of 15 core electric connectors 1 export brake signal to electronic control unit
3, while relative displacement occurring between tractor and trailer, it is slid back and forth between link block 1 and link block 2 23, position
Displacement sensor 24 outputs a signal to electronic control unit 3 after detecting variable quantity, and electronic control unit 3 comprehensively considers the tractor received
The relative displacement variable quantity signal that brake signal and displacement sensor detect, outputs signal to electronic after internal algorithm calculates
Hydraulic pump 42 and liquid feed valve 46 make liquid feed valve 46 be in "On" state, and the high-pressure brake liquid in high pressure accumulator 44 is through liquid feed valve
46 flow into wheel cylinder 49, push brake-shoe or caliper to be braked, this is pressure process.
When tractor releases braking, electronic control unit 3 receives tractor and releases brake signal, according to displacement transducer signal
Judge whether also to need to brake trailer, closes liquid feed valve 46 and liquid valve 47
It closes, this is pressure maintaining period；Conversely, electronic control unit 3 drives liquid valve 47, the brake fluid in wheel cylinder 49 flows back to liquid storage through liquid valve 47
For tank 41 to complete release, trailer releases braking.
Tractor releases braking, and electronic control unit 3 receives tractor and releases brake signal, according to the displacement sensing received
The signal that device 24 exports judges whether also to need to brake trailer, makes liquid feed valve 46 extensive if also needing to brake trailer
Multiple " closing " state, this is pressure maintaining period；Conversely, electronic control unit 3 outputs signal to liquid feed valve 46, liquid valve 47 and electric hydraulic pump
42, so that liquid valve 47 is in "On" state, liquid feed valve is in " closing " state, and electric hydraulic pump 42 stops working, in wheel cylinder 49
Brake fluid flows back to fluid reservoir 41 through liquid valve 47, this is stress-relief process.
When tractor is moved backward, electronic control unit 3 receives tractor astern signal, does not brake to trailer, until completing
Reversing.
Tractor reversing, although displacement sensor 24 detects that variable quantity electronic control unit 3 receives 15 core electric connectors 1
The tractor astern signal of output, trailer not will do it braking at this time, until completing reversing.
The utility model uses tractor brake signal+displacement sensor structure, when tractor braking, can stand
It detects brake signal and displacement transducer signal, and trailer is braked in time.Compared to inertial braking system, traction
After vehicle draw hook and trailer towing ring are hit, trailer could trigger braking, and the utility model braking is sensitive, and can be big
The big braking impact for reducing the trailer due to caused by braking retardation to tractor, improves flat in tractor drawbar trailer traveling
It is pliable.And when avoiding the reversing of inertia braking bring the problem of triggering braking, the brake without the complexity of development structure again
To automatically terminate reversing braking.The utility model is using electronic control, compared to the complete mechanical structure of inertial braking system, braking
Sensitive, braking is reliably and braking characteristic is adjustable.
Claims (7)
1. a kind of active trailer brake system characterized by comprising
15 core electric connectors (1), for the electrical connection between tractor and trailer；
Coupling member (2), for the mechanical connection between tractor and trailer；
Electronic control unit (3) issues corresponding command signal for receiving the signal of 15 core electric connectors (1) and coupling member (2)
It is executed to hydraulic system (4)；
Hydraulic system (4), the executing agency for trailer braking protection valve；
Battery (5), for powering for electronic control unit (3) and hydraulic system (4)；
The signal output end phase of the signal input part of the electronic control unit (3) and coupling member (2) and 15 core electric connectors (1)
Even, the signal output end of electronic control unit (3) is connected with the signal input part of hydraulic system (4), the 15 core electric connector (1)
Power output end is connected with the power input of battery (5) and hydraulic system (4) respectively, the power output end of battery (5)
It is connected respectively with the power input of electronic control unit (3) and hydraulic system (4).
2. active trailer brake system according to claim 1, it is characterised in that:
The coupling member (2) includes trailer towing ring (21), link block one (22), link block two (23), displacement sensor
(24), limit spring (25) and emergency braking apparatus (26)；
Described link block one (22) one end is fixedly connected with trailer towing ring (21), and the other end can slidingly be nested in connection
In block two (23)；
Institute's displacement sensors (24) one end is fixedly connected with link block one (22), the other end and the fixed company of link block two (23)
It connects；
The limit spring (25) is placed in the end and link block two (23) that link block one (22) is nested in link block two (23)
Between the limited block of inside；
The emergency braking apparatus (26) is fixed at the top of link block two (23), steel wire pull line one end and the tractor phase of extraction
Even, the other end is connected with trailer parking brake cable；
The signal output end of institute's displacement sensors (24) is connected with the signal input part of electronic control unit (3).
3. active trailer brake system according to claim 1, it is characterised in that:
The signal output end of the 15 core electric connector (1) includes that tractor brake signal output end and tractor astern signal are defeated
Outlet.
4. active trailer brake system according to claim 1, it is characterised in that:
The hydraulic system (4) includes fluid reservoir (41), electric hydraulic pump (42), check valve (43), high pressure accumulator (44), subtracts
Pressure valve (45), liquid feed valve (46), liquid valve (47), hydrostatic sensor (48) and wheel cylinder (49)；
The fluid reservoir (41), electric hydraulic pump (42), check valve (43), liquid feed valve (46), wheel cylinder (49) are successively gone here and there with pipeline
Connection, wheel cylinder (49) is also sequentially connected in series with liquid valve (47), fluid reservoir (41) with pipeline, the pipeline of high pressure accumulator (44) and unidirectional
Pipeline between valve (43) and liquid feed valve (46) communicates, the inlet of (45) one end Jie electric hydraulic pump (42) of pressure reducing valve, separately
The inlet of one end Jie liquid feed valve (46), hydrostatic sensor (48) be placed in pipeline that liquid feed valve (46) is connected with wheel cylinder (49) it
In；
The control terminal of the electric hydraulic pump (42), liquid feed valve (46) and liquid valve (47) respectively with the electronic control unit (3)
Signal output end is connected；
The power supply of the power input of the electric hydraulic pump (42) and the 15 core electric connector (1) and battery (5) exports
End is connected.
5. active trailer brake system according to claim 4, it is characterised in that:
When tractor is braked, electronic control unit (3) receives tractor brake signal and displacement transducer signal, drives electric hydaulic
(42) and liquid feed valve (46) are pumped, the high-pressure brake liquid in high pressure accumulator (44) is completed through liquid feed valve (46) to wheel cylinder (49) pressurization
Trailer braking protection valve.
6. active trailer brake system according to claim 4, it is characterised in that:
When tractor releases braking, electronic control unit (3) receives tractor and releases brake signal, is sentenced according to displacement transducer signal
It is disconnected whether also to need to brake trailer, close liquid feed valve (46) and liquid valve (47)
It closes, this is pressure maintaining period；Conversely, electronic control unit (3) driving liquid valve (47), the inner brake fluid of wheel cylinder (49) is through liquid valve (47)
Fluid reservoir (41) are flowed back to complete release, trailer releases braking.
7. active trailer brake system according to claim 4, it is characterised in that:
When tractor is moved backward, electronic control unit (3) receives tractor astern signal, does not brake to trailer, until completing
Vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820675640.6U CN208291203U (en) | 2018-05-08 | 2018-05-08 | A kind of active trailer brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820675640.6U CN208291203U (en) | 2018-05-08 | 2018-05-08 | A kind of active trailer brake system |
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| Publication Number | Publication Date |
|---|---|
| CN208291203U true CN208291203U (en) | 2018-12-28 |
Family
ID=64704107
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820675640.6U Active CN208291203U (en) | 2018-05-08 | 2018-05-08 | A kind of active trailer brake system |
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| CN (1) | CN208291203U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108501907A (en) * | 2018-05-08 | 2018-09-07 | 南京理工大学 | A kind of active trailer brake system |
| CN114802144A (en) * | 2021-01-18 | 2022-07-29 | 丰田自动车株式会社 | Hydraulic brake system |
-
2018
- 2018-05-08 CN CN201820675640.6U patent/CN208291203U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108501907A (en) * | 2018-05-08 | 2018-09-07 | 南京理工大学 | A kind of active trailer brake system |
| CN114802144A (en) * | 2021-01-18 | 2022-07-29 | 丰田自动车株式会社 | Hydraulic brake system |
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