CN202400077U - Power cutoff electric control system for unilateral service braking of engineering vehicle - Google Patents
Power cutoff electric control system for unilateral service braking of engineering vehicle Download PDFInfo
- Publication number
- CN202400077U CN202400077U CN2012200010739U CN201220001073U CN202400077U CN 202400077 U CN202400077 U CN 202400077U CN 2012200010739 U CN2012200010739 U CN 2012200010739U CN 201220001073 U CN201220001073 U CN 201220001073U CN 202400077 U CN202400077 U CN 202400077U
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- oil circuit
- pressure
- pressure switch
- braking
- brake
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Abstract
A power cutoff electric control system for unilateral service braking of an engineering vehicle comprises a braking bridge, a left oil circuit, a right oil circuit and a braking balance valve, wherein the left oil circuit is used for controlling braking of a left wheel of the braking bridge, the right oil circuit is used for controlling braking of a right wheel of the braking bridge, and the braking balance valve is used for connection of the left oil circuit with the right oil circuit. Two first pressure switches are arranged in the left oil circuit and the right oil circuit respectively, a second pressure switch is arranged in one of the left oil circuit and the right oil circuit, and the movement pressure of the first pressure switches are lower than that of the second pressure switch. A brake light is controlled by signals of the first pressure switch, and the second pressure switch controls power output of a gearbox. The power cutoff electric control system has the advantages that 1, the pressure switches with set pressure values are mounted in the oil circuits of a braking system and need no adjustment after mounting is completed, so that assembly efficiency and control precision are improved; 2, the power cutoff system and the brake light are controlled by the pressure switches with two pressure values respectively, the operating condition that the brake light is turned on without cutting off the power system can be easily realized.
Description
Technical field
The utility model relates to a kind of electronic control system of service brake of engineering truck, and particularly a kind of walking brake power of the engineering truck with one side brake cuts off electric-control system.
Background technology
The service brake of engineering truck is to realize vehicle braked for brake system brake activation power through brake pedal control brake work-saving device.Engineering truck need cut off the power of change speed gear box at the driving glancing impact, otherwise can aggravate the wearing and tearing of brake strip, need open stoplight stop lamp simultaneously with caution front vehicle and personnel on every side.Traditional method is to use mechanical switch to detect brake signal, and such method need be regulated BK Brake Switch, will cut off power or brake and floors and also can't cut off the phenomenon of power otherwise can occur gently touching on the brake.In addition, use traditional method, stoplight stop lamp and power cut realize simultaneously, and can't satisfy only needs stoplight stop lamp bright and need not the needs of power cut.
The one side brake of engineering truck is that braking bridge one side tire is braked to realize reducing the effect of turn inside diameter radius.Turn inside diameter need not cut off power during one side brake, but need light stoplight stop lamp with the prompting related personnel.The method of the brake signal of traditional mechanical switch detection at present can't be applied to the one side brake system; And after installing, this checking system need experienced technical personnel to debug; Influenced the efficiency of assembling of complete machine, and the precision of detection speed-slackening signal is not high yet.
Summary of the invention
Goal of the invention: the purpose to above technical matters the utility model provides a kind of power cut electric-control system that is applicable to the monolateral service brake of engineering truck; Through detecting the pressure of the fluid in the brake line, the unlatching through pressure switch control power cut system and stoplight stop lamp or close.
Technical scheme: the power cut electric-control system of the monolateral service brake of a kind of engineering truck; Comprise the left oil circuit of braking bridge, control brake bridge left side wheel braking, the right oil circuit and the brake balancing valve that is connected left and right oil circuit of control brake bridge the right wheel braking; Respectively be provided with one first pressure switch in the said left and right oil circuit respectively; Be provided with one second pressure switch in said one of them oil circuit of left and right oil circuit; The operating pressure of said first pressure switch is lower than the second pressure switch operating pressure, and said first pressure switch is connected with control unit respectively with second pressure switch; The takeoff output of said control unit control stoplight stop lamp and change speed gear box; The signal control stoplight stop lamp of said first pressure switch, the takeoff output of said second pressure switch control change speed gear box.When engineering truck turns to enforcement to carry out one side brake; The oil pressure that one of them oil circuit of left and right oil circuit carries out in the brake circuit raises; The oil pressure that another oil circuit does not carry out in the brake circuit remains unchanged, and stoplight stop lamp is opened when oil pressure reaches the setting value of first pressure switch; Before first pressure switch was not moved simultaneously in another oil circuit, second pressure switch can't operate.When engineering truck carries out two-wheeled glancing impact simultaneously; Stoplight stop lamp was opened when oil pressure reached the pressure set points of first pressure switch in the left and right oil circuit; When the further rising of oil pressure reaches the pressure set points of second pressure switch; Control unit cuts off the takeoff output of change speed gear box, and it is prerequisite that the enforcement of power cut must be connected with two first pressure switches.
In order to improve the reliability of power cut system, respectively be provided with one second pressure switch in the said left and right oil circuit respectively, control unit cuts off the takeoff output of change speed gear box when two second pressure switches all reach setup pressure value.The first pressure switch parallel control stoplight stop lamp in two oil circuits is just opened as long as in two first pressure switches one connects then stoplight stop lamp; Takeoff output, first pressure switch and the second pressure switch mutually noninterfere of change speed gear box are just cut off in second pressure switch series connection control power cut in two oil circuits under the situation of having only two second pressure switches all to connect.
Beneficial effect: 1, that design of pressure is good pressure switch is installed in the brake system oil circuit, need not after the installation to debug once more, has improved efficiency of assembling and control accuracy; 2, control power cut system and stoplight stop lamp respectively through the pressure switch of two kinds of force value, be easy to just to realize open stoplight stop lamp but the operating mode of not cutting off power system.
Description of drawings
Fig. 1 is first embodiment of the utility model control principle figure;
Fig. 2 is second embodiment of the utility model control principle figure.
The specific embodiment
Embodiment one
As shown in Figure 1; The power cut electric-control system of the monolateral service brake of a kind of engineering truck; Comprise braking bridge 1, the left oil circuit 2 of control brake bridge 1 left side wheel braking, the right oil circuit 3 and the brake balancing valve 4 that is connected left and right oil circuit 2,3 of control brake bridge 1 the right wheel braking; Respectively be provided with one first pressure switch 5 respectively in said left and right oily 2, the 3 tunnel; Be provided with one second pressure switch 6 in said left and right oil circuit 2,3 one of them oil circuit, the operating pressure of said first pressure switch 5 is lower than second pressure switch, 6 operating pressures, and said first pressure switch 5 is connected with control unit 7 respectively with second pressure switch 6; Said control unit 7 control stoplight stop lamp 8 and change speed gear boxs 9; The signal control stoplight stop lamp 8 of said first pressure switch 5, the takeoff output of said second pressure switch, 6 control change speed gear boxs 9.When engineering truck turns to enforcement to carry out one side brake; The oil pressure that left and right oil circuit 2,3 one of them oil circuit carry out in the brake circuit raises; The oil pressure that another oil circuit does not carry out in the brake circuit remains unchanged, and stoplight stop lamp 8 is opened when oil pressure reaches the setting value of first pressure switch 5; Before first pressure switch 5 was not moved simultaneously in another oil circuit, second pressure switch 6 can't operate.When engineering truck carries out two-wheeled glancing impact simultaneously; Stoplight stop lamp 8 was opened when oil pressure reached the pressure set points of first pressure switch 5 in the left and right oil circuit 2,3; When the further rising of oil pressure reaches the pressure set points of second pressure switch 6; Control unit 7 cuts off the takeoff output of change speed gear box 9, and it is prerequisite that the enforcement of power cut must be connected with two first pressure switches 5.
Embodiment two
As shown in Figure 2; The power cut electric-control system of the monolateral service brake of a kind of engineering truck; Comprise braking bridge 1, the left oil circuit 2 of control brake bridge 1 left side wheel braking, the right oil circuit 3 and the brake balancing valve 4 that is connected left and right oil circuit 2,3 of control brake bridge 1 the right wheel braking; Respectively be provided with one first pressure switch 5 respectively in the said left and right oil circuit 2,3; Respectively be provided with one second pressure switch 6 respectively in the said left and right oil circuit 2,3, the operating pressure of said first pressure switch 5 is lower than second pressure switch, 6 operating pressures, and said first pressure switch 5 is connected with control unit 7 respectively with second pressure switch 6; The takeoff output of said control unit 7 control stoplight stop lamps 8 and change speed gear box 9; The signal control stoplight stop lamp 8 of said first pressure switch 5, control unit 7 cuts off the takeoff output of change speed gear box 9 when two second pressure switches 6 all reach setup pressure value.First pressure switch, 5 parallel control stoplight stop lamps 8 in two oil circuits are just opened as long as in two first pressure switches 5 one connects then stoplight stop lamp 8; Takeoff output, first pressure switch 5 and 6 mutually noninterferes of second pressure switch of change speed gear box 9 are just cut off in second pressure switch, 6 series connection control power cuts in two oil circuits under the situation of having only two second pressure switches 6 all to connect.
Claims (2)
1. the power cut electric-control system of the monolateral service brake of engineering truck; Comprise the left oil circuit (2) of braking bridge (1), control brake bridge (1) left side wheel braking, the right oil circuit (3) and the brake balancing valve (4) that is connected left and right oil circuit (2,3) of control brake bridge (1) the right wheel braking; It is characterized in that: said left and right oil circuit respectively is provided with one first pressure switch (5) respectively in (2,3); Be provided with one second pressure switch (6) in one of them oil circuit of said left and right oil circuit (2,3); The operating pressure of said first pressure switch (5) is lower than second pressure switch (6) operating pressure, and said first pressure switch (5) is connected with control unit (7) respectively with second pressure switch (6); Said control unit (7) is controlled the advance valve (10) of stoplight stop lamp (8) and change speed gear box (9) and is retreated valve (11); The signal control stoplight stop lamp (8) of said first pressure switch (5), the takeoff output of said second pressure switch (6) control change speed gear box (9).
2. the power cut electric-control system of the monolateral service brake of engineering truck as claimed in claim 1; It is characterized in that: said left and right oil circuit respectively is provided with one second pressure switch (6) respectively in (2,3), when the takeoff output of two second pressure switches (6) control unit (7) cut-out change speed gear box (9) when all reaching setup pressure value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200010739U CN202400077U (en) | 2012-01-04 | 2012-01-04 | Power cutoff electric control system for unilateral service braking of engineering vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200010739U CN202400077U (en) | 2012-01-04 | 2012-01-04 | Power cutoff electric control system for unilateral service braking of engineering vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202400077U true CN202400077U (en) | 2012-08-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200010739U Expired - Fee Related CN202400077U (en) | 2012-01-04 | 2012-01-04 | Power cutoff electric control system for unilateral service braking of engineering vehicle |
Country Status (1)
| Country | Link |
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| CN (1) | CN202400077U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514564A (en) * | 2012-01-04 | 2012-06-27 | 江苏柳工机械有限公司 | Power cut-off electric control system for unilateral driving brake of engineering vehicle |
-
2012
- 2012-01-04 CN CN2012200010739U patent/CN202400077U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514564A (en) * | 2012-01-04 | 2012-06-27 | 江苏柳工机械有限公司 | Power cut-off electric control system for unilateral driving brake of engineering vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120829 Termination date: 20160104 |