CN204895446U - High -power wheeled tractor stopper low pressure helping hand braking system - Google Patents
High -power wheeled tractor stopper low pressure helping hand braking system Download PDFInfo
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- CN204895446U CN204895446U CN201520591754.9U CN201520591754U CN204895446U CN 204895446 U CN204895446 U CN 204895446U CN 201520591754 U CN201520591754 U CN 201520591754U CN 204895446 U CN204895446 U CN 204895446U
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- pressure
- stopper
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Abstract
High -power wheeled tractor stopper low pressure helping hand braking system includes: oil absorption oil filter, oil pump, prefill valve, manometer, energy storage ware, booster low pressure alarm switch, two -chamber brake booster, stopper helping hand hydraulic cylinder, stopper hydraulic pressure oil return oil tank, the oil absorption oil filter is installed in the hydraulic tank of tractor, and the oil pump is installed in tractor organism side, pass through the tube coupling between oil absorption oil filter and the oil pump, the prefill valve is installed in tractor organism side and is passed through the tube coupling with the oil pump, the two -chamber brake booster is installed and is passed through the tube coupling in tractor driver's cabin front portion and prefill valve, stopper helping hand hydraulic cylinder installs and pass through the tube coupling on tractor stopper casing and with the two -chamber brake booster, it is preceding at the tractor driver's cabin that stopper hydraulic pressure oil return oil tank passes through the support mounting, passes through the tube coupling with the two -chamber brake booster. The oil sources can be shareed with tractor low pressure hydraulic system by this system, the system satisfies the operation requirement of tractor stopper joint completely.
Description
Technical field
The utility model belongs to trac. field, relates 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..
Utility model content
The purpose of this utility model is to provide a kind of compact conformation, and 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.
The technical solution of the utility model 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.
The utility model adopts after technique scheme can reach following beneficial effect: can share oil sources with trac. low-pressure hydraulic system, 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 the utility model large power wheel tractor drg low pressure energy assisted braking system.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model 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 |
|---|---|---|---|
| CN201520591754.9U CN204895446U (en) | 2015-08-10 | 2015-08-10 | High -power wheeled tractor stopper low pressure helping hand braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520591754.9U CN204895446U (en) | 2015-08-10 | 2015-08-10 | High -power wheeled tractor stopper low pressure helping hand braking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204895446U true CN204895446U (en) | 2015-12-23 |
Family
ID=54917648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520591754.9U Expired - Fee Related CN204895446U (en) | 2015-08-10 | 2015-08-10 | High -power wheeled tractor stopper low pressure helping hand braking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204895446U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105035052A (en) * | 2015-08-10 | 2015-11-11 | 第一拖拉机股份有限公司 | Low-pressure energy-assisted braking system for brake of high-power wheeled tractor |
-
2015
- 2015-08-10 CN CN201520591754.9U patent/CN204895446U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105035052A (en) * | 2015-08-10 | 2015-11-11 | 第一拖拉机股份有限公司 | Low-pressure energy-assisted braking system for brake of high-power wheeled tractor |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20210810 |