CN108407783A - Active trailer brake system - Google Patents
Active trailer brake system Download PDFInfo
- Publication number
- CN108407783A CN108407783A CN201810430886.1A CN201810430886A CN108407783A CN 108407783 A CN108407783 A CN 108407783A CN 201810430886 A CN201810430886 A CN 201810430886A CN 108407783 A CN108407783 A CN 108407783A
- Authority
- CN
- China
- Prior art keywords
- trailer
- tractor
- electronic control
- control unit
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
- B60T7/20—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger specially for trailers, e.g. in case of uncoupling of or overrunning by trailer
- B60T7/203—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger specially for trailers, e.g. in case of uncoupling of or overrunning by trailer with automatic brake release or reduction in case of reverse travel, e.g. by means of mechanisms mounted on the draw bar
Abstract
The present invention discloses a kind of active trailer brake system, including：15 core electric connectors (1), coupling member (2), electronic control unit (3), motor hydraulic system (4) and accumulator (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 motor hydraulic system (4), the power output end of the 15 core electric connector (1) is connected with the power input of accumulator (5) and motor hydraulic system (4) respectively, and the power output end of accumulator (5) is connected with the power input of electronic control unit (3) and motor hydraulic system (4) respectively.The present invention active trailer brake system, braking it is sensitive, reversing when brakeless and braking characteristic it is adjustable.
Description
Technical field
The invention belongs to brake system of car technical field, especially a kind of braking is sensitive, reversing when brakeless and braking
The adjustable active trailer brake system of characteristic.
Background technology
Driving device that trailer itself is unpowered, tractive force is provided by tractor.The braking system of trailer is different from tractor.
Currently, domestic and international trailer brake system generally use inertial braking system.
Inertial braking system is divided into mechanical type inertia braking system and fluid pressure type inertial braking system.
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 one) is disclosed
Kind mechanical type inertia braking system is generated the thrust to trailer towing ring, pushes haulage gear 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 susceptible to
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
Profit application " Surge brake actuator " (application number：14/196304, publication date：2015.08.13).Both use
Fluid pressure type inertial braking system.When tractor brakes, speed reduces, 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 direction, 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 braked in turning, easily causes trailer
The phenomenon that open-top 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 is moved backward,
Can inertia impact be caused to trailer, can not moved backward to make trailer generate braking.It is general at present to do to solve the problems, such as this
Method includes：1., before reversing, with reversing pin by inertia braking device locking, then move backward again.This method is excessively cumbersome；
2., using the brake that automatically terminates of reversing braking, if Chinese utility model patent application is " band brake hoof reverse loosing mechanism
Brake " (application number：200820075951.5 publication date：2009.07.01) a kind of small trailer drum brake is disclosed,
Braking is automatically terminated in reversing, and can restore inertia braking automatically when advancing, and solves inertial braking system trailer not
The problem of energy automatic backing.But this method need to develop brake again, and brake can only be made in smaller reversing braking moment
It moves backward under, 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 cannot be satisfied requirement of moving backward under steep gradient or severe duty；Braking characteristic can not be adjusted.
Invention content
It is an object of the invention to propose a kind of active trailer brake system, braking is sensitive, reversing when brakeless and system
Dynamic characteristic is adjustable.
Realize that the technical solution of the object of the invention is：
A kind of active trailer brake system, including：
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 signals of 15 core electric connectors 1 and coupling member 2, send out corresponding command signal to
Motor hydraulic system 4 executes；
Motor hydraulic system 4, for the executing agency as trailer braking protection valve；
Accumulator 5, for powering for electronic control unit 3 and motor hydraulic system 4；
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 motor hydraulic system 4, the power supply of the 15 core electric connector 1
Output end is connected with the power input of accumulator 5 and motor hydraulic system 4 respectively, the power output end of accumulator 5 respectively with
Electronic control unit 3 is connected with the power input of motor hydraulic system 4.
Compared with prior art, the present invention its remarkable advantage is：
1, it brakes sensitive：Using active trailer brake system, 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.
Brakeless when 2, moving backward：When receiving tractor astern signal, trailer will not be braked, and inertia braking system is avoided
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 present invention is described in further detail with reference to the accompanying drawings and detailed description.
Description of the drawings
Fig. 1 is the structure diagram of the active trailer brake system of the present invention, and dotted line is signal wire, and solid line is power cord.
Fig. 2 is the fundamental diagram of coupling member in Fig. 1.
Fig. 3 is the fundamental diagram of motor 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, motor hydraulic system 4, accumulator 5；
Trailer towing ring 21, link block 1, link block 2 23, displacement sensor 24, limit spring 25, emergency braking dress
Set 26；
Motor 41, deceleration mechanism 42, movement conversion mechanism 43, master cylinder 44, fluid reservoir 45, hydrostatic sensor 46, wheel
Cylinder 47.
Specific implementation mode
As shown in Figure 1, the active trailer brake system of the present invention, which is characterized in that including：
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 signals of 15 core electric connectors 1 and coupling member 2, send out corresponding command signal to
Motor hydraulic system 4 executes；
Motor hydraulic system 4, for the executing agency as trailer braking protection valve；
Accumulator 5, for powering for electronic control unit 3 and motor hydraulic system 4；
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 motor hydraulic system 4, the power supply of the 15 core electric connector 1
Output end is connected with the power input of accumulator 5 and motor hydraulic system 4 respectively, the power output end of accumulator 5 respectively with
Electronic control unit 3 is connected with the power input of motor hydraulic system 4.
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 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；
One 22 one end of the 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 the end and 2 23 inside of link block that link block 1 is nested in link block 2 23
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.
According to《Electric connector 24V15 core patterns between GB/T 20717-2006 road vehicles tractors and trailer》Regulation：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.
As shown in figure 3, the motor hydraulic system 4 includes motor 41, deceleration mechanism 42, movement conversion mechanism 43, braking
Master cylinder 44, fluid reservoir 45, hydrostatic sensor 46 and wheel cylinder 47；
The motor 41, deceleration mechanism 42, movement conversion mechanism 43, master cylinder 44 are sequentially connected in series, master cylinder 44
Inlet is connected with fluid reservoir 45 with pipeline, and liquid outlet is connected with wheel cylinder 47 with pipeline, hydrostatic sensor 46 be placed in liquid outlet with
Among the connected pipeline of wheel cylinder 47；
The control terminal of the motor 41 is connected with the signal output end of the electronic control unit 3；
The power input of the motor 41 is connected with the power output end of the 15 core electric connector 1 and accumulator 5.
Because of trailer passive delivery, according to《Electric connector between GB/T 20717-2006 road vehicles tractors and trailer
24V15 core patterns》Regulation：15 core electric connector, 1 contact 9 be 24V continued power power output ends, by its respectively with accumulator 5 and
The power input of motor hydraulic system 4 is connected, by the power output end of accumulator 5 respectively with electronic control unit 3 and motor hydraulic pressure
The power input of system 4 is connected.When trailer need not be braked in driving process, 15 core electric connectors 1 charge to accumulator 5；
When trailer needs braking, 15 core electric connectors 1 and accumulator 5 are powered to motor hydraulic system 4 simultaneously.
The operation principle of the active trailer brake system of the present invention is as follows：
When tractor is braked, electronic control unit 3 receives tractor brake signal and displacement transducer signal, driving motor 41
Rotation pushes 44 piston of master cylinder to complete trailer to the pressurization of wheel cylinder 47 after deceleration mechanism 42, movement conversion mechanism 43
Braking.
Tractor is braked, and the tractor brake signal output end of 15 core electric connectors 1 exports 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 considers the tractor received
The relative displacement variable quantity signal that brake signal and displacement sensor detect, motor is outputed signal to after internal algorithm calculates
41, the rotary motion of motor 41 passes to movement conversion mechanism 43 after 42 deceleration torque of deceleration mechanism and is converted into linear motion, pushes away
44 piston motion of dynamic master cylinder, brake fluid are pressed into wheel cylinder 47, and brake-shoe or caliper is pushed to be braked, this is to add
Press through journey.
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, 41 rotor of motor made to keep current location if also needing to brake trailer,
This is pressure maintaining period；Conversely, 3 driving motor 41 of electronic control unit reversely rotates, through deceleration mechanism 42,43 post-tensioning of movement conversion mechanism
44 piston of master cylinder is returned to which to 47 release of wheel cylinder, 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, and 41 rotor of motor is made if also needing to brake trailer
Current location is kept, this is pressure maintaining period；Conversely, electronic control unit 3 outputs signal to motor 41, motor 41 is made to reversely rotate, electricity
The reverse rotation motion of machine 41 passes to movement conversion mechanism 43 after 42 deceleration torque of deceleration mechanism and is converted into reverse linear movement,
The movement of 44 piston reverses direction of master cylinder, the brake fluid in wheel cylinder 47 is pulled to flow back to fluid reservoir 45 through master cylinder 44, this is release
Process.
When tractor is moved backward, electronic control unit 3 receives tractor astern signal, is not braked to trailer, until completing
Reversing.
Tractor is moved backward, 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 will not be braked at this time, until completing reversing.
The present invention uses the structure of tractor brake signal+displacement sensor, when tractor is braked, can examine immediately
Brake signal and displacement transducer signal are measured, and trailer is braked in time.Compared to inertial braking system, tractor is led
Draw after hook and trailer towing ring hit, trailer could trigger braking, the present invention brake it is sensitive, and can greatly reduce by
Trailer caused by braking retardation impacts the braking of tractor, improves the ride comfort in tractor drawbar trailer traveling.And
When avoiding the reversing that inertia braking is brought the problem of triggering braking, the brake without development structure complexity again is to automatic
Release reversing braking.The present invention uses electronic control, and compared to the structure of the full machinery of inertial braking system, braking sensitive, braking can
It leans on and braking characteristic is adjustable.
Claims (7)
1. a kind of active trailer brake system, which is characterized in that including：
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), the signal for receiving 15 core electric connectors (1) and coupling member (2), sends out corresponding command signal
It is executed to motor hydraulic system (4)；
Motor hydraulic system (4), for the executing agency as trailer braking protection valve；
Accumulator (5), for powering for electronic control unit (3) and motor 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 motor hydraulic system (4), the 15 core electric connector
(1) power output end is connected with the power input of accumulator (5) and motor hydraulic system (4) respectively, the electricity of accumulator (5)
Source output terminal is connected with the power input of electronic control unit (3) and motor hydraulic system (4) respectively.
2. 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.
3. 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)；
The 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).
4. active trailer brake system according to claim 1, it is characterised in that：
The motor hydraulic system (4) includes motor (41), deceleration mechanism (42), movement conversion mechanism (43), master cylinder
(44), fluid reservoir (45), hydrostatic sensor (46) and wheel cylinder (47)；
The motor (41), deceleration mechanism (42), movement conversion mechanism (43), master cylinder (44) are sequentially connected in series, master cylinder
(44) inlet is connected with fluid reservoir (45) with pipeline, and liquid outlet is connected with wheel cylinder (47) with pipeline, hydrostatic sensor (46)
It is placed among the pipeline that liquid outlet is connected with wheel cylinder (47)；
The control terminal of the motor (41) is connected with the signal output end of the electronic control unit (3)；
The power input of the motor (41) is connected with the power output end of the 15 core electric connector (1) and accumulator (5).
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, driving motor (41)
Rotation pushes master cylinder (44) piston to pressurize to wheel cylinder (47) after deceleration mechanism (42), movement conversion mechanism (43)
Complete 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, so that motor (41) rotor is kept current location if also needing to brake trailer,
This is pressure maintaining period；Conversely, electronic control unit (3) driving motor (41) reversely rotates, through deceleration mechanism (42), movement conversion mechanism
(43) master cylinder (44) piston is retracted after to which to wheel cylinder (47) 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, is not braked to trailer, until completing
Vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810430886.1A CN108407783A (en) | 2018-05-08 | 2018-05-08 | Active trailer brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810430886.1A CN108407783A (en) | 2018-05-08 | 2018-05-08 | Active trailer brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108407783A true CN108407783A (en) | 2018-08-17 |
Family
ID=63138069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810430886.1A Pending CN108407783A (en) | 2018-05-08 | 2018-05-08 | Active trailer brake system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108407783A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108839569A (en) * | 2018-08-28 | 2018-11-20 | 毛琦 | A kind of brake of trailer and acceleration system |
| CN109606339A (en) * | 2018-12-13 | 2019-04-12 | 北汽福田汽车股份有限公司 | Parking braking system and vehicle |
| CN110606064A (en) * | 2019-08-28 | 2019-12-24 | 南京理工大学 | Trailer braking system based on line control |
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| DE102013006913A1 (en) * | 2013-04-22 | 2014-10-23 | Milan Mertlik | Brake device for trailers |
| CN104309599A (en) * | 2014-09-26 | 2015-01-28 | 同济大学 | Electro-hydraulic brake system |
| CN107000806A (en) * | 2014-07-01 | 2017-08-01 | 布吕格利公司 | Trailer for bicycle |
| CN107878434A (en) * | 2017-11-30 | 2018-04-06 | 南京理工大学 | Electric controlled brake system for trailer |
| CN208291204U (en) * | 2018-05-08 | 2018-12-28 | 南京理工大学 | Active trailer brake system |
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2018
- 2018-05-08 CN CN201810430886.1A patent/CN108407783A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102656071A (en) * | 2009-12-18 | 2012-09-05 | 威伯科有限公司 | Method for signalling a brake process at a trailer vehicle, control device for this purpose, and dynamo system, trailer vehicle brake system and trailer vehicle with said control device |
| DE102013006913A1 (en) * | 2013-04-22 | 2014-10-23 | Milan Mertlik | Brake device for trailers |
| CN107000806A (en) * | 2014-07-01 | 2017-08-01 | 布吕格利公司 | Trailer for bicycle |
| CN104309599A (en) * | 2014-09-26 | 2015-01-28 | 同济大学 | Electro-hydraulic brake system |
| CN107878434A (en) * | 2017-11-30 | 2018-04-06 | 南京理工大学 | Electric controlled brake system for trailer |
| CN208291204U (en) * | 2018-05-08 | 2018-12-28 | 南京理工大学 | Active trailer brake system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108839569A (en) * | 2018-08-28 | 2018-11-20 | 毛琦 | A kind of brake of trailer and acceleration system |
| CN109606339A (en) * | 2018-12-13 | 2019-04-12 | 北汽福田汽车股份有限公司 | Parking braking system and vehicle |
| CN110606064A (en) * | 2019-08-28 | 2019-12-24 | 南京理工大学 | Trailer braking system based on line control |
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