CN108639033B - Hand brake system and method for loader with trailer - Google Patents
Hand brake system and method for loader with trailer Download PDFInfo
- Publication number
- CN108639033B CN108639033B CN201810522753.7A CN201810522753A CN108639033B CN 108639033 B CN108639033 B CN 108639033B CN 201810522753 A CN201810522753 A CN 201810522753A CN 108639033 B CN108639033 B CN 108639033B
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- trailer
- electromagnetic valve
- valve
- hand brake
- terminal
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- 238000000034 method Methods 0.000 title abstract description 8
- 238000005457 optimization Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/08—Brake-action initiating means for personal initiation hand actuated
- B60T7/10—Disposition of hand control
-
- 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
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
-
- 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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention discloses a hand brake system and a method of a loader with a trailer, wherein a power supply is connected with a terminal b of a brake switch, an electric control end of a first electromagnetic valve, a terminal v of a signal device and an electric control end of a second electromagnetic valve, a terminal a of the hand brake switch is connected with the electric control end of the first electromagnetic valve and the electric control end of the second electromagnetic valve, a terminal E of the hand brake switch is connected with a terminal u of the signal device, a terminal m of the signal device is connected with a power cutting-off device, an air port F of the first electromagnetic valve is connected with an air port 43 of the trailer valve, the trailer valve is connected with an air port E of the first electromagnetic valve and an air cylinder, a working oil port K and a working oil port L of the second electromagnetic valve are respectively connected with an accumulator and the hand brake device, a working oil port K of the second electromagnetic valve is connected with an oil source P, and an air outlet G and an oil return port T are respectively arranged on the first electromagnetic valve and the second electromagnetic valve. The invention can simultaneously complete the emergency braking of the loader and the trailer without modifying the loader and the trailer braking system.
Description
Technical Field
The invention relates to the field of engineering machinery, in particular to a hand brake system and a hand brake method for a loader with a trailer.
Background
When the loader and the trailer hung at the rear end of the loader run at high speed at the same time, if emergency braking is required for the vehicle, if braking is realized by the loader at the front end only, the braking distance is longer. Especially when the mass of the trailer is too great, it is likely that the trailer will tip over the loader during emergency braking, and thus it is necessary to control both the loader and the trailer. The emergency braking of the loader is electrohydraulic caliper disc braking, the trailer needs to control a trailer valve to carry out air braking through a hand braking valve, a manual valve of the electrohydraulic caliper disc type hand braking is an electric signal controlled valve, a conventional tractor hand braking valve with the trailer is an air control valve, and the existing contradiction is that the electrohydraulic caliper disc type gearbox emergency braking and the air control type trailer emergency braking are controlled simultaneously through the manual valve controlled through the electric signal. There is therefore a great need in the art for a brake system that can simultaneously emergency brake a loader and a trailer hitch attached to the rear end of the loader.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a hand brake system and a hand brake method for a loader with a trailer, which solve the problem that the loader and the trailer hung at the rear end of the loader cannot be braked simultaneously in the prior art.
In order to achieve the above object, the present invention adopts the following technical scheme:
the utility model provides a take loader hand braking system of trailer, includes hand brake switch, power, signal device, first solenoid valve, gas receiver, trailer valve, energy storage ware, second solenoid valve and hand brake device, terminal b of brake switch is connected to one electrode of power, the automatically controlled end of first solenoid valve, signal device's terminal v and the automatically controlled end of second solenoid valve are connected to another electrode of power, the automatically controlled end of first solenoid valve and the automatically controlled end of second solenoid valve are connected to hand brake switch's terminal a, signal device's terminal u is connected to hand brake switch's terminal E, power cutting device is connected to signal device's terminal m, the gas port of trailer valve is connected to the gas port F of first solenoid valve, the gas port E and the gas receiver of first solenoid valve are connected to the A mouth of trailer valve, energy storage ware and hand brake device are connected respectively to the work hydraulic fluid port K of second solenoid valve, oil source P is connected to first solenoid valve and second solenoid valve still be equipped with gas vent G and oil return port T respectively.
As an optimization scheme, the hand brake system of the loader with the trailer is characterized in that the air storage cylinder is further connected with a first pressure switch, and the first pressure switch is connected with a whole vehicle alarm device.
As an optimization scheme, the hand brake system of the loader with the trailer is characterized in that the energy accumulator is further connected with a second pressure switch, and the second pressure switch is connected with a whole vehicle alarm device.
As an optimization scheme, the hand brake system of the loader with the trailer is characterized in that the first electromagnetic valve is a two-position three-way electromagnetic air pressure valve.
As an optimization scheme, the hand brake system of the loader with the trailer is characterized in that the second electromagnetic valve is a two-position three-way electromagnetic hydraulic valve.
As an optimization scheme, the hand brake system of the loader with the trailer has the rated voltage of 24V.
As an optimization scheme, in the hand brake system with the trailer for the loader, the positive electrode of the power supply is connected with the terminal b of the brake switch.
The method for the hand brake system of the loader with the trailer comprises the following steps: when a driver starts a hand brake switch, an m terminal of the signal device outputs a complete machine power cut-off signal to a complete machine control system, the complete machine power is cut off, the first electromagnetic valve and the second electromagnetic valve are both powered off, and the hand brake device and the trailer valve respectively apply braking to the loader and the trailer, so that emergency braking to the loader and the trailer is completed.
The invention has the beneficial effects that: the invention can simultaneously complete the emergency braking of the loader and the trailer, and can be realized by only operating the hand braking switch during operation, thereby improving the convenience of operation to the greatest extent. In addition, the problem that the structure and the principle of the existing loader and trailer braking device are different can be solved, large-scale modification of the braking systems of the loader and the trailer is not needed, and the cost is furthest reduced on the basis of the existing loader and the trailer.
Drawings
FIG. 1 is a diagram of the normal running state of the whole vehicle of the invention;
FIG. 2 is a diagram of the emergency braking state of the whole vehicle according to the invention;
meaning of reference numerals: 1-a hand brake switch; 2-a power supply; 3-signalling means; 4-a first pressure switch; 5-a first solenoid valve; 6-an air cylinder; 7-a trailer valve; 8-an accumulator; 9-a second solenoid valve; 10-a second pressure switch; 11-hand brake device.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
As shown in fig. 1-2: the embodiment discloses a loader hand braking system with a trailer, which comprises a hand braking switch 1, a power supply 2, a signal device 3, a first electromagnetic valve 5, an air storage cylinder 6, a trailer valve 7, an energy accumulator 8, a second electromagnetic valve 9 and a hand braking device 11, wherein one electrode of the power supply 2 is connected with a terminal b of the braking switch 1, the other electrode of the power supply 2 is connected with an electric control end of the first electromagnetic valve 5, a terminal v of the signal device 3 and an electric control end of the second electromagnetic valve 9, a terminal a of the hand braking switch 1 is connected with the electric control end of the first electromagnetic valve 5 and the electric control end of the second electromagnetic valve 9, a terminal E of the hand braking switch 1 is connected with a terminal u of the signal device 3, a terminal m of the signal device 3 is connected with a power cutting device for outputting a power cutting-off signal, an air port F of the first electromagnetic valve 5 is connected with an air port 43 of the trailer valve 7, an air port E of the trailer valve 7 and an air storage cylinder 6 are respectively connected with an air port E of the first electromagnetic valve 5, a working oil port K of the second electromagnetic valve 9 and a working oil port L of the second electromagnetic valve 9 are respectively connected with the energy accumulator 8 and the hand braking device 11, a working oil port K of the second electromagnetic valve 9 is respectively connected with an oil source P, and the first electromagnetic valve 5 and the second electromagnetic valve 9 are respectively provided with an air outlet G and an air outlet port.
The air cylinder 6 and the energy accumulator 8 are also respectively connected with a first pressure switch 4 and a second pressure switch 10, and the first pressure switch 4 and the second pressure switch 10 are both connected with a whole vehicle alarm device. When the pressure in the air reservoir 6 and the accumulator 8 is reduced to the set value, the first pressure switch 4 and the second pressure switch 10 send out low-pressure alarm to the whole vehicle control device, so that a driver is prompted to supplement the pressure to the air reservoir 6 and the accumulator 8, and the brake system can work normally.
The first electromagnetic valve 5 of this embodiment is a two-position three-way electromagnetic pneumatic valve, the second electromagnetic valve 9 is a two-position three-way electromagnetic hydraulic valve, the rated voltage of the power supply 2 is 24V, the positive electrode of the power supply 2 is connected with the terminal b of the brake switch 1, and the negative electrode is connected with the electric control end of the first electromagnetic valve 5, the terminal V of the signal device 3 and the electric control end of the second electromagnetic valve 9.
The embodiment also discloses a method for the hand brake system of the loader with the trailer, and the description is made with reference to the accompanying drawings: as shown in fig. 1: when the vehicle is in a normal mode, the terminal a and the terminal b of the hand brake switch 1 are communicated, at the moment, the working oil port K and the working oil port L of the second electromagnetic valve 9 are communicated, the oil port D of the hand brake device 11 generates pressure, namely the pressure exists in a rod cavity of the hand brake device 11, a spring of a rodless cavity of the hand brake device 11 is compressed under the action of oil in the rod cavity, and the hand brake device 11 is released; on the other hand, the air port E of the first electromagnetic valve 5 is communicated with the air port F, and the air pressure in the air storage tank 6 passes through the first electromagnetic valve 5 to the air port 43 of the trailer valve 7, and the trailer valve 7 releases the hand brake of the trailer, so that the trailer can normally run. The other two control ports 41 and 42 of the trailer valve 7 are connected to the service brake valve of the trailer for ensuring proper operation of the trailer valve 7.
As shown in fig. 2: when the whole vehicle needs to be braked urgently, a driver starts the hand brake switch 1, the terminal a and the terminal b of the hand brake switch 1 are disconnected, the terminal b and the terminal e are connected, then the hand brake alarm circuit is connected, the signal device 3 starts to alarm to prompt that the whole vehicle is in an emergency braking state, meanwhile, the m terminal of the signal device 3 outputs a signal for cutting off the power of the whole vehicle, and the power of the whole vehicle is cut off. At the moment, the two electromagnetic valves are simultaneously powered off, a valve core of the second electromagnetic valve 9 positioned on the loader moves upwards, a working oil port L is communicated with a T port, pressure oil of the hand brake device 11 returns to the T port through the D port and the L port under the action of a spring, and the loader brakes; on the other hand, the valve core of the first electromagnetic valve 5 moves leftwards, the air pressure of the air port 43 of the trailer valve 7 is communicated with the atmosphere through the air port F and the air outlet G of the first electromagnetic valve 5, the pressure of the air port 43 drops sharply, and the trailer valve 7 carries out emergency braking on the trailer. In the process, the loader and the trailer finish braking simultaneously.
By adopting the embodiment, the emergency braking of the loader and the trailer can be completed at the same time, and the operation can be realized only by operating the hand brake switch 1, so that the convenience of the operation can be improved to the greatest extent. In addition, the problem that the structure and the principle of the existing loader and trailer braking device are different can be solved, large-scale modification of the braking systems of the loader and the trailer is not needed, and the cost is furthest reduced on the basis of the existing loader and the trailer.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (4)
1. A hand brake system for a loader with a trailer, comprising: comprises a hand brake switch (1), a power supply (2), a signal device (3), a first electromagnetic valve (5), an air storage cylinder (6), a trailer valve (7), an energy accumulator (8), a second electromagnetic valve (9) and a hand brake device (11), wherein one electrode of the power supply (2) is connected with a terminal b of the hand brake switch (1), the other electrode of the power supply (2) is respectively and directly connected with an electric control end of the first electromagnetic valve (5), a terminal v of the signal device (3) and an electric control end of the second electromagnetic valve (9),
the terminal a of the hand brake switch (1) is respectively and directly connected with the electric control end of the first electromagnetic valve (5) and the electric control end of the second electromagnetic valve (9), the first electromagnetic valve (5) is positioned in a trailer brake gas path, and the second electromagnetic valve (9) is positioned in a loader brake oil path;
the terminal E of the hand brake switch (1) is connected with the terminal u of the signal device (3), the terminal m of the signal device (3) is connected with the power cut-off device, the air port F of the first electromagnetic valve (5) is connected with the air port (43) of the trailer valve (7), the A port of the trailer valve (7) is connected with the air port E of the first electromagnetic valve (5) and the air cylinder (6), the working oil port K and the working oil port L of the second electromagnetic valve (9) are respectively connected with the energy accumulator (8) and the hand brake device (11), the working oil port K of the second electromagnetic valve (9) is connected with the oil source P, and the air outlet G and the oil return port T are respectively arranged on the first electromagnetic valve (5) and the second electromagnetic valve (9);
the first electromagnetic valve (5) is a two-position three-way electromagnetic air pressure valve;
the second electromagnetic valve (9) is a two-position three-way electromagnetic hydraulic valve;
when the vehicle runs normally, the terminal a and the terminal b of the hand brake switch are communicated, at the moment, the working oil port K and the working oil port L of the second electromagnetic valve are communicated, the oil port D of the hand brake device (11) generates pressure, namely the pressure exists in a rod cavity of the hand brake device, a spring of a rodless cavity of the hand brake device is compressed under the action of oil in the rod cavity, and the hand brake device is released;
on the other hand, the air port E of the first electromagnetic valve is communicated with the air port F, air pressure in the air storage tank passes through the air port of the first electromagnetic valve to the trailer valve, and the trailer valve releases hand brake of the trailer, so that the trailer can normally run; the other two control air ports of the trailer valve are connected with a service brake valve of the trailer and used for ensuring the normal operation of the trailer valve;
when the whole vehicle needs to be braked urgently, a driver starts a hand brake switch (1), a terminal a and a terminal b of the hand brake switch (1) are disconnected, a terminal b and a terminal e are connected, a hand brake alarm circuit is connected, a signal device (3) starts to give an alarm to prompt that the whole vehicle is in an emergency braking state, and a terminal m of the signal device (3) outputs a signal for cutting off the power of the whole vehicle, so that the power of the whole vehicle is cut off;
at the moment, the two electromagnetic valves are simultaneously powered off, a valve core of a second electromagnetic valve (9) positioned on the loader moves upwards, a working oil port L is communicated with an oil return port T, pressure oil of a hand braking device (11) returns oil from the port D to the port L under the action of a spring, and the loader brakes; on the other hand, the valve core of the first electromagnetic valve (5) moves leftwards, the air pressure of the air port (43) of the trailer valve (7) is communicated with the atmosphere through the air port F and the air outlet G of the first electromagnetic valve (5), the pressure of the air port (43) drops sharply, the trailer valve (7) carries out emergency braking on the trailer, and the loader and the trailer finish braking simultaneously;
the air cylinder (6) is also connected with a first pressure switch (4), and the first pressure switch (4) is connected with a whole car alarm device.
2. A hand brake system for a loader with a trailer as claimed in claim 1, wherein: the energy accumulator (8) is also connected with a second pressure switch (10), and the second pressure switch (10) is connected with a whole vehicle alarm device.
3. A hand brake system for a loader with a trailer as claimed in claim 1, wherein: the rated voltage of the power supply (2) is 24V.
4. A hand brake system for a loader with a trailer according to claim 1 or 3, characterized in that: the positive electrode of the power supply (2) is connected with the terminal b of the hand brake switch (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810522753.7A CN108639033B (en) | 2018-05-28 | 2018-05-28 | Hand brake system and method for loader with trailer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810522753.7A CN108639033B (en) | 2018-05-28 | 2018-05-28 | Hand brake system and method for loader with trailer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108639033A CN108639033A (en) | 2018-10-12 |
| CN108639033B true CN108639033B (en) | 2024-04-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810522753.7A Active CN108639033B (en) | 2018-05-28 | 2018-05-28 | Hand brake system and method for loader with trailer |
Country Status (1)
| Country | Link |
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| CN (1) | CN108639033B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112977375B (en) * | 2021-02-26 | 2022-08-12 | 徐工集团工程机械股份有限公司科技分公司 | Engineering machinery anti-lock brake system and engineering machinery |
| CN112977374B (en) * | 2021-02-26 | 2022-06-03 | 徐工集团工程机械股份有限公司科技分公司 | Pilot type engineering machinery anti-lock brake system and engineering machinery |
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| CN208827800U (en) * | 2018-05-28 | 2019-05-07 | 徐工集团工程机械股份有限公司科技分公司 | A kind of loading machine hand braking system with trailer |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108639033A (en) | 2018-10-12 |
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