CN105035052A - Low-pressure energy-assisted braking system for brake of high-power wheeled tractor - Google Patents
Low-pressure energy-assisted braking system for brake of high-power wheeled tractor Download PDFInfo
- Publication number
- CN105035052A CN105035052A CN201510481188.0A CN201510481188A CN105035052A CN 105035052 A CN105035052 A CN 105035052A CN 201510481188 A CN201510481188 A CN 201510481188A CN 105035052 A CN105035052 A CN 105035052A
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- Prior art keywords
- oil
- tractor
- brake
- pressure
- pipeline
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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
- 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
- B60T13/12—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 the fluid being liquid
- B60T13/16—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 the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
- B60T13/168—Arrangements for pressure supply
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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
- 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
- B60T17/226—Devices for monitoring or checking brake systems; Signal devices using devices being responsive to the difference between the fluid pressions in conduits of multiple braking systems
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
A low-pressure energy-assisted braking system for a brake of a high-power wheeled tractor comprises an oil suction and filter device, an oil pump, a liquid filling valve, a pressure gauge, an energy accumulator, a power booster low-pressure alarm switch, a double-cavity brake booster, a brake power-assisted hydraulic oil cylinder and a brake hydraulic oil return tank. The oil suction and filter device is arranged in a hydraulic oil tank of the tractor. The oil pump is arranged on the side face of a machine body of the tractor. The oil suction and filter device is connected with the oil pump through a pipeline. The liquid filling valve is arranged on the side face of the machine body of the tractor and connected with the oil pump through a pipeline. The double-cavity brake booster is arranged on the front portion of a cab of the tractor and connected with the liquid filling valve through a pipeline. The brake power-assisted hydraulic oil cylinder is arranged on a shell of the brake of the tractor and connected with the double-cavity brake booster through a pipeline. The brake hydraulic oil return tank is arranged in front of the cab of the tractor through a support and is connected with the double-cavity brake booster through a pipeline. The low-pressure energy-assisted braking system and a low-pressure hydraulic system of the tractor can share an oil source. The low-pressure energy-assisted braking system completely meets the use requirement for connecting the low-pressure energy-assisted braking system and the brake of the tractor.
Description
Technical field
The invention belongs to trac. field, relate to a kind of large power wheel tractor drg low pressure energy assisted braking system.
Background technology
At present, the large tractor of domestic employing oil-immersed multi-disk brake adopts hydrostatic maneuvering system mostly.Along with the demand in market, the increase of trac. power becomes inexorable trend, and complete machine weight is also in continuous increase, and the oil-immersed multi-disk brake size of mating also corresponding increase, drg actuating force also increases thereupon.In order to meet the operating needs of drg in said system, increase system architecture size and component size is often adopted to realize its object, its result can cause maneuvering system efficiency to reduce, actuating force weight, control run is large, thus cause drg effectively not engage, affect the normal use of drg.And system is set up at complete machine cloth and takies larger space, bring difficulty to system layout.Not enough in order to make up this, be necessary to develop a kind of use reliably, handle light, stroke is short, compact conformation, and the drg low pressure energy assisted braking system of arrangement convenience, to meet the operating needs of trac..
Summary of the invention
The object of the present invention is to provide a kind of compact conformation, use reliable, handle light, stroke is short, and the large power wheel tractor drg low pressure energy assisted braking system of arrangement convenience, to meet the operating needs of large power wheel tractor.
Technical scheme of the present invention is: large power wheel tractor drg low pressure energy assisted braking system, comprising: oil-suction oil filter, oil pump, prefill valve, compression indicator, energy storage, servo-unit low pressure warning switch, two-chamber brake servo unit, drg assisted hydraulic oil cylinder, brake hydraulic oil return fuel tank; Oil-suction oil filter is arranged in the hydraulic reservoir of trac., and oil pump is arranged on tractor body side; Be connected by pipeline between oil-suction oil filter with oil pump; Prefill valve is contained in tractor body side and is connected by pipeline with oil pump; Compression indicator, energy storage, servo-unit low pressure warning switch serial connection is communicated with, and communicates with the check valve oil outlet in prefill valve; Two-chamber brake servo unit is arranged on tractor cab front portion and is connected by pipeline with prefill valve; Drg assisted hydraulic oil cylinder is arranged on tractor brake housing upper face and is connected by pipeline with two-chamber brake servo unit; Brake hydraulic oil return fuel tank, is connected by pipeline with two-chamber brake servo unit by support installing before tractor cab.
Prefill valve comprises: by pass valve, check valve, restriction, high-pressure filter; Prefill valve inside is set side by side with pressure setting part, pressure compensator, and both are communicated with by internal galleries, and is communicated with by internal galleries with the outlet of check valve; By pass valve is communicated with by internal galleries with pressure compensator; High-pressure filter and check valve are connected in series by restriction and are communicated with; And communicate with the oil outlet of check valve.
Following beneficial effect can be reached: oil sources can be shared with trac. low-pressure hydraulic system after the present invention adopts technique scheme, need not another oil prospecting source again; System can meet the operating needs that tractor mechanism moves device joint; Overall system architecture is compact, simple and direct.
Accompanying drawing explanation
Fig. 1 is the structural representation of large power wheel tractor drg low pressure energy assisted braking system of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.As shown in Figure 1, large power wheel tractor drg low pressure energy assisted braking system, comprising: oil-suction oil filter 1, oil pump 2, by pass valve 3, check valve 4, restriction 5, high-pressure filter 6, prefill valve 7, compression indicator 8, energy storage 9, servo-unit low pressure warning switch 10, two-chamber brake servo unit 11, drg assisted hydraulic oil cylinder 12, pressure setting part 13, pressure compensator 14, brake hydraulic oil return fuel tank 15; Large power wheel tractor drg low pressure energy assisted braking system, comprising: oil-suction oil filter 1, oil pump 2, prefill valve 7, compression indicator 8, energy storage 9, servo-unit low pressure warning switch 10, two-chamber brake servo unit 11, drg assisted hydraulic oil cylinder 12, brake hydraulic oil return fuel tank 15; Oil-suction oil filter 1 is arranged in the hydraulic reservoir 16 of trac., and oil pump 2 is arranged on tractor body side; Be connected by pipeline between oil-suction oil filter 1 with oil pump 2; Prefill valve 7 is contained in tractor body side and is connected by pipeline with oil pump 2; Compression indicator 8, energy storage 9, servo-unit low pressure warning switch 10 serial connection is communicated with, and communicates with check valve 4 oil outlet in prefill valve 7; Two-chamber brake servo unit 11 is arranged on tractor cab front portion and is connected by pipeline with prefill valve 7; Drg assisted hydraulic oil cylinder 12 is arranged on tractor brake housing upper face and is connected by pipeline with two-chamber brake servo unit 11; Brake hydraulic oil return fuel tank 15, is connected by pipeline with two-chamber brake servo unit 11 by support installing before tractor cab.
Prefill valve 7 comprises: by pass valve 3, check valve 4, restriction 5, high-pressure filter 6; Prefill valve 7 inside is set side by side with pressure setting part 13, pressure compensator 14, and both are communicated with by internal galleries, and is communicated with by internal galleries with the outlet of check valve 4; By pass valve 3 is communicated with by internal galleries with pressure compensator 14; High-pressure filter 6 and check valve 4 are connected in series by restriction 5 and are communicated with; And communicate with the oil outlet of check valve 4.
Incipient state: oil pump 2 oily through oil-suction oil filter 1 by oil pressure pump to the entrance point P of the pressure compensator 14 in prefill valve 7, pressure compensator 14 initial condition is positioned at right position under spring force, the oil of entrance point P is entered energy storage 9 by the oil duct in pressure compensator 14 carried out topping up by high-pressure filter 6, restriction 5, check valve 4 one tunnel, and another road enters the pressure setting part 13 of prefill valve 7; Pressure setting part 13 initial condition is in left position under right-hand member action of the spring; Fluid one tunnel entering pressure setting part 13 acts directly on the right-hand member of pressure compensator 14, and pressure compensator 14 is still in right position under the effect of pressure oil and spring; Another road then acts on the left end of pressure compensator 14 as signal oil circuit by pressure setting part 13; When oil pump 2 carrys out the spring setting pressure of oil pressure overpressure setting member 13, pressure setting part 13 is in left position under the effect of left end oil pressure, and the fluid in signal oil circuit communicates with hydraulic reservoir 16.Pressure compensator 14 left end signalling oil flows back to hydraulic reservoir 16, and pressure compensator 14 is in left position under the action of the spring.Oil pump 2 is oily directly enters next chamber, and check valve 4 is closed.So far filling process terminates, and the flow of pump is with minimum pressure drop by prefill valve 7, and when energy storage 9 pressure is lower than pressure setting part 13 setting pressure, pressure setting part 13 is back to left position, and energy storage 9 enters the next topping up cycle.
Two-chamber brake servo unit comprises: the elements such as two-chamber brake servo unit 11, drg assisted hydraulic oil cylinder 12, brake hydraulic oil return fuel tank 15.
Incipient state: the oily oil suction chamber entering two-chamber brake servo unit 11 of oil pump 2, when not stepping on brake pedal, oil pump 2 is oily does not enter power-assisted chamber, and power-assisted chamber fluid is by two-chamber brake servo unit 11 inner back oil road straight braking device hydraulic oil-returning fuel tank 15.
When stepping on brake pedal, hydraulic efficiency pressure system comes the oily power-assisted chamber entering two-chamber brake servo unit 11, and the piston promoting two-chamber brake servo unit 11 inside moves right, fluid is pressed into drg assisted hydraulic oil cylinder 12, thus promotion drg assisted hydraulic oil cylinder 12 piston moves, drive the motion of brake operating lever part, realize the joint of tractor brake.
The supercharging pressure of energy storage 9 and filling amount ensure that works as hydraulic system fails, when oil pump 2 cannot supplement fluid, still can provide activating pressure and the flow of more than 20 times to two-chamber brake servo unit 11; Ensure that the normal engagement of tractor brake.
When the setting pressure of the oil liquid pressure to two-chamber brake servo unit 11 lower than servo-unit low pressure warning switch 10, servo-unit low pressure warning switch 10 starts to report to the police, and prompting chaufeur checks hydraulic efficiency pressure system.
When the pressure of energy storage 9 is lower than setting pressure, prefill valve 7 starts, until energy storage 9 is charged to setting value.
When release the brake stretcher, when drg is separated again, oil pump 2 and prefill valve 7 not fuel feeding; Under the returning place force effect of drg pull back spring, enter the hydraulic oil of drg assisted hydraulic oil cylinder 12, get back to two-chamber brake servo unit 11, and directly enter brake hydraulic oil return fuel tank 15 through the oil return oil duct of two-chamber brake servo unit 11.
Each parts are coupled together by the pipeline of different latus rectum and sealing member by systematic schematic diagram, and are fixed on the diverse location of the complete machine body of trac. by support etc., to meet the operating needs of tractor brake.
Claims (2)
1. large power wheel tractor drg low pressure energy assisted braking system, comprising: oil-suction oil filter (1), oil pump (2), prefill valve (7), compression indicator (8), energy storage (9), servo-unit low pressure warning switch (10), two-chamber brake servo unit (11), drg assisted hydraulic oil cylinder (12), brake hydraulic oil return fuel tank (15); It is characterized in that: oil-suction oil filter (1) is arranged in the hydraulic reservoir (16) of trac., and oil pump (2) is arranged on tractor body side; Be connected by pipeline between oil-suction oil filter (1) with oil pump (2); Prefill valve (7) is arranged on tractor body side and is connected by pipeline with oil pump (2); Compression indicator (8), energy storage (9), servo-unit low pressure warning switch (10) serial connection is communicated with, and communicates with check valve (4) oil outlet in prefill valve (7); Two-chamber brake servo unit (11) is arranged on tractor cab front portion and is connected by pipeline with prefill valve (7); Drg assisted hydraulic oil cylinder (12) is arranged on tractor brake housing upper face and is connected by pipeline with two-chamber brake servo unit (11); Brake hydraulic oil return fuel tank (15), is connected by pipeline with two-chamber brake servo unit (11) by support installing before tractor cab.
2. large power wheel tractor drg low pressure energy assisted braking system according to claim 1, is characterized in that: prefill valve (7) comprising: by pass valve (3), check valve (4), restriction (5), high-pressure filter (6); Prefill valve (7) inside is set side by side with pressure setting part (13), pressure compensator (14), and both are communicated with by internal galleries, and is communicated with by internal galleries with the outlet of check valve (4); By pass valve (3) is communicated with by internal galleries with pressure compensator (14); High-pressure filter (6) and check valve (4) are connected in series by restriction (5) and are communicated with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510481188.0A CN105035052A (en) | 2015-08-10 | 2015-08-10 | Low-pressure energy-assisted braking system for brake of high-power wheeled tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510481188.0A CN105035052A (en) | 2015-08-10 | 2015-08-10 | Low-pressure energy-assisted braking system for brake of high-power wheeled tractor |
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| Publication Number | Publication Date |
|---|---|
| CN105035052A true CN105035052A (en) | 2015-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510481188.0A Pending CN105035052A (en) | 2015-08-10 | 2015-08-10 | Low-pressure energy-assisted braking system for brake of high-power wheeled tractor |
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| CN (1) | CN105035052A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108515955A (en) * | 2018-03-20 | 2018-09-11 | 洛阳世英机械制造有限公司 | Used with tractor brake booster |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1944130A (en) * | 2002-07-19 | 2007-04-11 | 英国美瑞特重型车制动系统有限公司 | Bi-directional braking component for vehicle |
| CN201023468Y (en) * | 2007-04-06 | 2008-02-20 | 中国一拖集团有限公司 | Hydraulic brake operation device for tractor |
| CN102050098A (en) * | 2010-12-20 | 2011-05-11 | 中国一拖集团有限公司 | Hydraulic dynamic brake operating system for tractor |
| CN103118913A (en) * | 2010-09-29 | 2013-05-22 | 罗伯特·博世有限公司 | Power assisted break system for a vehicle and method for controlling a power assisted break system |
| CN203698256U (en) * | 2013-11-19 | 2014-07-09 | 西华大学 | Special-purpose vehicle braking system |
| CN203864675U (en) * | 2014-05-08 | 2014-10-08 | 广州电力机车有限公司 | Hydraulic braking system for mining dump trucks |
| CN204895446U (en) * | 2015-08-10 | 2015-12-23 | 第一拖拉机股份有限公司 | High -power wheeled tractor stopper low pressure helping hand braking system |
-
2015
- 2015-08-10 CN CN201510481188.0A patent/CN105035052A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1944130A (en) * | 2002-07-19 | 2007-04-11 | 英国美瑞特重型车制动系统有限公司 | Bi-directional braking component for vehicle |
| CN201023468Y (en) * | 2007-04-06 | 2008-02-20 | 中国一拖集团有限公司 | Hydraulic brake operation device for tractor |
| CN103118913A (en) * | 2010-09-29 | 2013-05-22 | 罗伯特·博世有限公司 | Power assisted break system for a vehicle and method for controlling a power assisted break system |
| CN102050098A (en) * | 2010-12-20 | 2011-05-11 | 中国一拖集团有限公司 | Hydraulic dynamic brake operating system for tractor |
| CN203698256U (en) * | 2013-11-19 | 2014-07-09 | 西华大学 | Special-purpose vehicle braking system |
| CN203864675U (en) * | 2014-05-08 | 2014-10-08 | 广州电力机车有限公司 | Hydraulic braking system for mining dump trucks |
| CN204895446U (en) * | 2015-08-10 | 2015-12-23 | 第一拖拉机股份有限公司 | High -power wheeled tractor stopper low pressure helping hand braking system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108515955A (en) * | 2018-03-20 | 2018-09-11 | 洛阳世英机械制造有限公司 | Used with tractor brake booster |
| CN108515955B (en) * | 2018-03-20 | 2019-06-28 | 洛阳世英机械制造有限公司 | Used with tractor brake booster |
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Application publication date: 20151111 |
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