CN203063930U - Hydraulic service brake system for milling machine - Google Patents
Hydraulic service brake system for milling machine Download PDFInfo
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- CN203063930U CN203063930U CN 201320053612 CN201320053612U CN203063930U CN 203063930 U CN203063930 U CN 203063930U CN 201320053612 CN201320053612 CN 201320053612 CN 201320053612 U CN201320053612 U CN 201320053612U CN 203063930 U CN203063930 U CN 203063930U
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Abstract
The utility model discloses a hydraulic service brake system for a milling machine, which comprises an oil tank, an oil suction filter, a gear pump and a servo control valve, wherein an S port of the gear pump is connected into the oil tank by the oil suction filter; the hydraulic service brake system further comprises a pressure compensator, a one-way valve, a pilot control valve, a brake valve, an energy accumulator, a pedal plate, a stop lamp pressure switch, a brake cylinder, a sequence valve and a reversal valve; according to the brake system, the pressure compensator, the one-way valve, the pilot control valve, the brake valve and the energy accumulator provide pressure oil for the brake cylinder; oil at an outlet of the brake valve serves as a pressure signal to control the sequence valve and the reversal valve; unloading of the oil at an outlet of a servo valve of a travelling pump and driving stop of the travelling pump are realized during brake; the safe and reliable brake of the milling machine is realized; the poor brake facts such as the delayed brake and coasting can be overcome particularly; the brake system utilizes the energy accumulator to reserve energy for the brake; and hydraulic driving is stopped during the brake, so that the safety and reliability of the brake are ensured.
Description
Technical field
The utility model relates to a kind of brake system, is specifically related to a kind of milling machine driving hydraulic brake system.
Background technology
Pavement milling machine is the special mechanical equipment of highway and urban highway maintenance work, be widely used in highway, the airport, harbour, the excavation of asphalt concrete pavements such as parking area is overhauled and the removing of pavement disease etc., at present, most middle-size and small-size milling machine on the market generally adopts the Closed Hydraulic Driving system, because its specific element design, cause the Closed Hydraulic Driving system that oil liquid leakage is constantly arranged at work, therefore also for bringing numerous influence factors (so multifactor uncertain leakage), the braking procedure of hydraulic efficiency pressure system all may reduce the hydraulic braking ability, so that milling machine is in the transition process and when steep gradient travels, the problems such as untimely or the slope of sauntering of braking often appear, it is unreliable that milling machine is braked, and brings great potential safety hazard for vehicle travels.
Summary of the invention
Problem at above-mentioned prior art existence, the utility model provides a kind of milling machine driving hydraulic brake system, this is one to be independent of the brake system of driving system, can overcome bad brake phenomenons such as the untimely and slope of sauntering of the brake that is prone to, and in braking, stop hydraulic-driven, guarantee that being perfectly safe of braking is reliable.
To achieve these goals, the technical solution adopted in the utility model is: a kind of milling machine driving hydraulic brake system, comprise fuel tank, the oil suction filter, gear type pump and servo operated valve, the S mouth of gear type pump inserts fuel tank through the oil suction filter, also comprise pressure compensator, check valve, pilot-actuated valve, brake activation valve, energy storage, stretcher, the stoplight stop lamp pressure switch, brake cylinder, sequence valve and change-over valve, 1. the mouth of described pressure compensator is connected the back and is connected with the P mouth of gear type pump with its control mouth a, 2. other working oil path of mouthful access milling machine of pressure compensator, 3. the mouth of pressure compensator is through check valve while and energy storage, the control mouth a of pilot-actuated valve, 2. mouthful connection of brake activation valve, 4. mouthful while and its control mouth b of pressure compensator, 1. the mouth of pilot-actuated valve and the control mouth b of pilot-actuated valve connect; 2. the mouth of described pilot-actuated valve is connected the back with the 1. control mouth a of mouth, brake activation valve of brake activation valve and inserts fuel tank; 3. mouthful while of the brake activation valve of the above is connected with the T1 mouth of its control mouth b, brake cylinder, 1 mouthful of the T ' of stoplight stop lamp pressure switch and the P mouth of sequence valve; The P1 mouth of sequence valve is connected with the control mouth b of change-over valve; 1. the mouth of change-over valve is connected with the M5 mouth of servo operated valve, and the 2. mouth of change-over valve is connected with the M4 mouth of servo operated valve, and stretcher is connected with brake activation valve.
This milling machine driving hydraulic brake system system also comprises the energy storage pressure switch, and described energy storage pressure switch is connected with energy storage, is connected with the 3. mouth of pressure compensator through check valve simultaneously.
This milling machine driving hydraulic brake system, utilize pressure compensator, check valve, pilot-actuated valve, brake activation valve, energy storage is embodied as brake cylinder provides pressure oil liquid, utilize the fluid of brake activation valve outlet as pressure signal control sequence valve, change-over valve, the off-load of walking pump servovalve outlet fluid when realizing braking, the stopping of walking pump drives, has the fast speed response characteristic, realized the safe and reliable braking of milling machine, especially can overcome bad brake phenomenons such as the untimely and slope of sauntering of the brake that is prone to, and this driving hydraulic brake system utilizes the energy storage energy reserve, required in order to braking, in braking, stop hydraulic-driven, simultaneously the energy storage pressure switch meets accident fault not when fuel feeding or other situations at oil feed pump, the energy storage pressure switch closure, the early warning energy storage pressure is low excessively, remind the staff to keep in repair, guaranteed the safe and reliable of braking especially.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure: 1, fuel tank, 2, the oil suction filter, 3, gear type pump, 4, other working oil path of milling machine, 5, pressure compensator, 6, check valve, 7, pilot-actuated valve, 8, brake activation valve, 9, the energy storage pressure switch, 10, energy storage, 11, stretcher, 12, the stoplight stop lamp pressure switch, 13, brake cylinder, 14, sequence valve, 15, change-over valve, 16, servo operated valve.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, this milling machine driving hydraulic brake system, comprise fuel tank 1, oil suction filter 2, gear type pump 3 and servo operated valve 16, the S mouth of gear type pump 3 inserts fuel tank 1 through oil suction filter 2, also comprise pressure compensator 5, check valve 6, pilot-actuated valve 7, brake activation valve 8, energy storage 10, stretcher 11, stoplight stop lamp pressure switch 12, brake cylinder 13, sequence valve 14 and change-over valve 15,1. the mouth of described pressure compensator 5 is connected the back and is connected with the P mouth of gear type pump 3 with its control mouth a, 2. other working oil path 4 of mouthful access milling machine of pressure compensator 5,3. the mouth of pressure compensator 5 is through check valve 6 while and energy storages 10, the control mouth a of pilot-actuated valve 7,2. mouthful connection of brake activation valve 8,4. mouthful while and its control mouth b of pressure compensator 5,1. the mouth of pilot-actuated valve and the control mouth b of pilot-actuated valve connect; 2. the mouth of described pilot-actuated valve 7 is connected the back with the 1. control mouth a of mouth, brake activation valve 8 of brake activation valve 8 and inserts fuel tank 1; 3. mouthful while of the brake activation valve 8 of the above is connected with the T1 mouth of its control mouth b, brake cylinder 13,1 mouthful of the T ' of stoplight stop lamp pressure switch 12 and the P mouth of sequence valve 14; The P1 mouth of sequence valve 14 is connected with the control mouth b of change-over valve 15; 1. the mouth of change-over valve 15 is connected with the M5 mouth of servo operated valve 16, and the 2. mouth of change-over valve 15 is connected with the M4 mouth of servo operated valve 16; Stretcher 11 is connected with brake activation valve 8.
This milling machine driving hydraulic brake system system also comprises energy storage pressure switch 9, and described energy storage pressure switch 9 is connected with energy storage 10, is connected with the 3. mouth of pressure compensator 5 through check valve 6 simultaneously.When oil feed pump meet accident fault not fuel feeding or other reasons etc., when causing energy storage 10 pressure to be lower than setting value 30bar, energy storage pressure switch 9 closures, early warning energy storage 10 hypotony, remind the staff to keep in repair, thereby energy storage pressure switch 9 plays the warning effect, improved the safe reliability of brake system.
Embodiment: as shown in Figure 1, gear type pump 3 passes through pressure compensator 5 to energy storage 10 topping ups, energy storage 10 passes through brake activation valve 8 to brake cylinder 13 fuel feeding, after the pressure oil of brake activation valve 8T1 mouth reaches setting value 30bar, can give the control mouth b of change-over valve 15 by the P1 confession of sequence valve 14, be used for realizing the off-load of walking pump servo operated valve 16 outlet fluid, thereby walking pump stops to drive when guaranteeing that car load carries out service brake; Before normally walking, pressure compensator 5, pilot-actuated valve 7, brake activation valve 8 all is operated in control mouthful b position one side, change-over valve 15 is operated in the opposite side of b mouth position, behind the engine starting, gear type pump 3 through oil suction filter 2 from fuel tank 1 oil suction, fluid is through pressure compensator 5, check valve 6 is given energy storage 10 topping ups, when the supercharging pressure of energy storage 10 reaches setting value 150bar, energy storage 10 topping ups finish, pilot-actuated valve 7 is pushed into the one side work of a mouth position, the b mouth control fluid of pressure compensator 5 is through pilot-actuated valve 7 off-loads, pressure compensator 5 is pushed to the one side work of a mouth position, by other working oil path 4 that the hydraulic oil major part of gear type pump 3 supplies is given milling machine through the 2. confession of pressure compensator 5, an other small part is through the damping hole of pressure compensator 5, pilot-actuated valve 7 flows back to fuel tank.In the time of need braking, the staff steps on stretcher 11 by suitable strength of one's legs, and the fluid in the energy storage 10 is supplied with brake cylinder 13 through brake activation valve 8, in case the pressure of brake activation valve 8T1 mouth reaches setting value 30bar, then sequence valve 14 is opened, and change-over valve 15 is pushed into the work of b mouth position side, and the oil inlet and outlet of servo operated valve 16 communicates and flows back to fuel tank, the walking pump swash plate returns zero-bit, discharge capacity reduces to zero, stoplight stop lamp pressure switch 12 closures, and stoplight stop lamp is bright simultaneously, drg is held wheel tightly, realizes braking.
After carrying out (being generally 3 to 5 times) braking for several times, when energy storage 10 circuit pressures drop to 123bar, sequence valve 14 cuts out, change-over valve 15 is replaced by the opposite side work of b mouth position, brake activation valve 8, pilot-actuated valve 7, pressure compensator 5 all are replaced by the work of b position side, fluid is supplied with energy storage 10 by gear type pump 3 again, and energy storage 10 enters the topping up state again.In addition, when oil feed pump meet accident fault not fuel feeding or other reasons etc., when causing energy storage 10 pressure to be lower than setting value 30bar, energy storage pressure switch 9 closures, early warning energy storage 10 hypotony remind the staff to keep in repair.Above process moves in circles, and can guarantee the safe and reliable braking of car load.
Claims (2)
1. milling machine driving hydraulic brake system, comprise fuel tank (1), oil suction filter (2), gear type pump (3) and servo operated valve (16), the S mouth of gear type pump (3) inserts fuel tank (1) through oil suction filter (2), it is characterized in that, also comprise pressure compensator (5), check valve (6), pilot-actuated valve (7), brake activation valve (8), energy storage (10), stretcher (11), stoplight stop lamp pressure switch (12), brake cylinder (13), sequence valve (14) and change-over valve (15), 1. the mouth of described pressure compensator (5) is connected the back and is connected with the P mouth of gear type pump (3) with its control mouth a, 2. other working oil path (4) of mouthful access milling machine of pressure compensator (5), 3. the mouth of pressure compensator (5) is through check valve (6) while and energy storage (10), the control mouth a of pilot-actuated valve (7), 2. mouthful connection of brake activation valve (8), 4. mouthful while and its control mouth b of pressure compensator (5), 1. the mouth of pilot-actuated valve and the control mouth b of pilot-actuated valve connect; 2. the mouth of described pilot-actuated valve (7) is connected the back with the 1. control mouth a of mouth, brake activation valve (8) of brake activation valve (8) and inserts fuel tank (1); 3. mouthful while of the brake activation valve of the above (8) is connected with the T1 mouth of its control mouth b, brake cylinder (13), 1 mouthful of the T ' of stoplight stop lamp pressure switch (12) and the P mouth of sequence valve (14); The P1 mouth of sequence valve (14) is connected with the control mouth b of change-over valve (15); 1. the mouth of change-over valve (15) is connected with the M5 mouth of servo operated valve (16), and the 2. mouth of change-over valve (15) is connected with the M4 mouth of servo operated valve (16); Stretcher (11) is connected with brake activation valve (8).
2. a kind of milling machine driving hydraulic brake system according to claim 1, it is characterized in that, also comprise energy storage pressure switch (9), described energy storage pressure switch (9) is connected with energy storage (10), is connected with the 3. mouth of pressure compensator (5) through check valve (6) simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320053612 CN203063930U (en) | 2013-01-31 | 2013-01-31 | Hydraulic service brake system for milling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320053612 CN203063930U (en) | 2013-01-31 | 2013-01-31 | Hydraulic service brake system for milling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203063930U true CN203063930U (en) | 2013-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320053612 Expired - Lifetime CN203063930U (en) | 2013-01-31 | 2013-01-31 | Hydraulic service brake system for milling machine |
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| CN (1) | CN203063930U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726435A (en) * | 2013-10-09 | 2014-04-16 | 徐州徐工特种工程机械有限公司 | Hydraulic control system of milling device |
| CN106240540A (en) * | 2016-08-29 | 2016-12-21 | 徐工集团工程机械股份有限公司科技分公司 | A kind of automatic breaking system |
| CN107697049A (en) * | 2017-08-11 | 2018-02-16 | 广西柳工机械股份有限公司 | Wheeled mixed drive walking machine transmission system |
| CN109843660A (en) * | 2017-09-26 | 2019-06-04 | 日立建机株式会社 | Vehicle brake system |
| CN111120424A (en) * | 2020-01-15 | 2020-05-08 | 天津市中重科技工程有限公司 | Hydraulic control system for lifting device of feeding trolley |
| CN115162436A (en) * | 2022-08-11 | 2022-10-11 | 山河智能装备股份有限公司 | Wheel excavator pilot control method, device, equipment and storage medium |
-
2013
- 2013-01-31 CN CN 201320053612 patent/CN203063930U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726435A (en) * | 2013-10-09 | 2014-04-16 | 徐州徐工特种工程机械有限公司 | Hydraulic control system of milling device |
| CN103726435B (en) * | 2013-10-09 | 2016-04-27 | 徐州徐工特种工程机械有限公司 | A kind of milling device hydraulic control system |
| CN106240540A (en) * | 2016-08-29 | 2016-12-21 | 徐工集团工程机械股份有限公司科技分公司 | A kind of automatic breaking system |
| CN107697049A (en) * | 2017-08-11 | 2018-02-16 | 广西柳工机械股份有限公司 | Wheeled mixed drive walking machine transmission system |
| CN107697049B (en) * | 2017-08-11 | 2019-07-30 | 广西柳工机械股份有限公司 | Wheeled mixed drive walking machine transmission system |
| CN109843660A (en) * | 2017-09-26 | 2019-06-04 | 日立建机株式会社 | Vehicle brake system |
| CN109843660B (en) * | 2017-09-26 | 2022-07-01 | 日立建机株式会社 | Vehicle brake system |
| CN111120424A (en) * | 2020-01-15 | 2020-05-08 | 天津市中重科技工程有限公司 | Hydraulic control system for lifting device of feeding trolley |
| CN115162436A (en) * | 2022-08-11 | 2022-10-11 | 山河智能装备股份有限公司 | Wheel excavator pilot control method, device, equipment and storage medium |
| CN115162436B (en) * | 2022-08-11 | 2023-07-11 | 山河智能装备股份有限公司 | Pilot control method, device and equipment for wheel excavator and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130717 |
|
| CX01 | Expiry of patent term |