CN203172616U - Brake valve - Google Patents
Brake valve Download PDFInfo
- Publication number
- CN203172616U CN203172616U CN 201320178658 CN201320178658U CN203172616U CN 203172616 U CN203172616 U CN 203172616U CN 201320178658 CN201320178658 CN 201320178658 CN 201320178658 U CN201320178658 U CN 201320178658U CN 203172616 U CN203172616 U CN 203172616U
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- Prior art keywords
- spool
- oil
- valve
- piston
- valve body
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a brake valve, which comprises a valve body, a left valve core and a right valve core, wherein the valve body is provided with an oil inlet line and an oil return line, the interior of the valve body is vertically and symmetrically provided with a left valve hole and a right valve hole, the two ends of the oil inlet line are respectively communicated with the left valve hole and the right valve hole, the two ends of the oil return line are respectively communicated with the left valve hole and the right valve hole, the interior of the left valve hole is provided with the left valve core, the left end surface of the left valve hole is provided with a first piston groove and is also integrally provided with a first annular boss and a second annular boss, the positions of the two annular bosses respectively correspond to the positions of the oil inlet line and the oil return line, the right end of the left valve core is sheathed with a first spring, the first piston groove corresponds to a first piston rod, a first cavity is arranged between a first piston and the left valve core, the interior of the left valve core is provided with a left valve core hole, a left oil outlet line is arranged above the middle part of the valve body and is communicated with the left valve hole, a left oil inlet line is arranged above the left side of the valve body and is communicated with the first cavity, and the right valve hole, a right valve core, a right oil return line and a right oil inlet line are symmetrical with the left valve hole, the left valve core, the left oil outlet line and the left oil inlet line at the left side. The brake valve has the advantages that the operation by external force is not needed, the structure is simpler, the maintenance is convenient, and the operation and the maintenance are simplified.
Description
Technical field
The utility model belongs to the brake activation valve field, particularly a kind of brake activation valve, the brake activation valve that uses during for the bulldozer hydraulic braking.
Background technology
Present existing bulldozer convertible valve is made up of steering clutch valve and brake activation valve two parts.Brake activation valve wherein, it is made up of lever, jackscrew, plug screw, piston, spring, brake spool, spring perch, bearing pin, killer, nut, spring cotter, Pilot poppet, worker's shape plate, valve body etc.Existing bulldozer convertible valve working process is: make the work of bulldozer steering clutch valve earlier for artificially application force of pull bar, disengaging of clutch, then, continue artificial pulling pull bar, the Pilot poppet that makes the lever that is attached thereto and jackscrew promote brake activation valve produces displacement, promote brake spool and produce displacement thereby drive bearing pin and spring, make partial pressure oil that the steering clutch valve comes deliver to the brake system of bulldozer by brake activation valve, finish handling maneuver.Piston and spring force react on brake spool simultaneously, make the brake spool working stability.More than existing brake activation valve structure is complicated as can be seen in narration, and cost is higher, and maintenance is difficulty, in addition, need to add external force to brake activation valve artificially during operation and could produce displacement action, make the people produce certain sense of fatigue, long-duration driving may have certain potential safety hazard.
The utility model content
The purpose of this utility model is complicated at present existing bulldozer hydraulic braking valve arrangement, and cost is higher, and the problem of action need external force provides a kind of brake activation valve, and this brake activation valve structure is simpler, and is easy to maintenance.
The technical scheme that adopts is:
A kind of brake activation valve comprises valve body, left spool and right spool.
Its technical essential is:
Valve body offers oil-feed oil circuit and oil return circuit.
Laterally zygomorphic left valve opening and the right valve opening of offering in the valve body.The upper end of oil-feed oil circuit is communicated with left valve opening, and the lower end of oil-feed oil circuit is communicated with right valve opening, and the upper end of oil return circuit is communicated with left valve opening, and the lower end of oil return circuit is communicated with right valve opening.
There are left flanged plate and right flanged plate in valve body both sides bolt respectively.
The left spool of installing in the valve opening of a left side, offer the first piston groove in the left side of left spool, the first ring platform and the second ring platform have been wholely set on the spool of a left side, the first ring platform is corresponding with the position of oil-feed oil circuit and oil return circuit respectively with the position of the second ring platform, left side spool right-hand member is arranged with first spring, and the two ends of first spring are replaced mutually with second Huan Tai and right flanged plate respectively.
First piston groove and first piston pole pair should be installed, and the first piston left side is spacing by left flanged plate, and the position between first piston and left spool is first cavity.
Offer left spool bore in the spool of a left side, left spool bore is through hole, comprises first spool bore and second spool bore that are interconnected.
Top, valve body middle part offers the left fuel-displaced oil circuit that is connected with left valve opening.
Top, valve body left side offers a left side that is communicated with first cavity and comes oil circuit.
The right spool of installing in the right valve opening, offer second piston groove in the left side of right spool, be wholely set the 3rd ring platform and Fourth Ring platform on the right spool, the position of the 3rd ring platform and Fourth Ring platform is corresponding with the position of oil-feed oil circuit and oil return circuit respectively, right spool right-hand member is arranged with second spring, and the two ends of second spring are replaced mutually with Fourth Ring platform and right flanged plate respectively.
The corresponding installing with second piston rod of second piston groove, second piston left side is spacing by left flanged plate, and the position between second piston and right spool is second cavity.
Offer right spool bore in the right spool, right spool bore is through hole, comprises the 3rd spool bore and the 4th spool bore that are interconnected.
Below, valve body middle part offers the right fuel-displaced oil circuit that is connected with right valve opening.
Below, valve body left side offers the right side that is communicated with second cavity and comes oil circuit.
On two spools, offer oil groove respectively.
Its principle of work is:
Oil circuit and right next oil circuit are come in a left side, are connected on the left and right work oil export branch road of steering clutch valve.
A left side fuel-displaced oil circuit and right fuel-displaced oil circuit connect the left and right brake system of bulldozer respectively, and when the fuel-displaced oil circuit in a left side and right fuel-displaced oil circuit had oil pressure, brake collar and brake wheel were that what to separate is that bulldozer does not have left and right turning in the bulldozer brake system.
When bulldozer does not have left steering when not having the next oil of the next oil circuit in a left side (no left clutch valve pressure oil comes) (first cavity does not have pressure oil), left side spool non-displacement under the effect of first spring, so the oil-feed oil circuit pressure by system's fuel feeding is identical with left fuel-displaced oil circuit pressure, the brake collar of bulldozer and brake wheel are that what to separate is that bulldozer does not have left steering under the effect of the fuel-displaced oil circuit pressure oil in a left side.
Simultaneously, left fuel-displaced oil circuit pressure oil enters the first spool bore inner chamber through second spool bore, and controls the stability of left spool with the first spring mutual action.
When bulldozer is desired left steering when a left side is come oil circuit (left clutch valve operation pressure oil comes) to come oil and raise gradually, left end first cavity of left side spool overcomes first acting force of the spring and produces displacement gradually to the right under pressure oil (entering through the second spool bore) combined action of the next oil circuit in a left side and first spool bore, turn down the oil-feed oil circuit gradually to the flow area of left fuel-displaced oil circuit, simultaneously, open the oil-feed oil circuit gradually to oil return circuit, the pressure of left fuel-displaced oil circuit is reduced gradually, the left brake collar of bulldozer is held left brake wheel gradually tightly, make the bulldozer left-handed turning to.
In like manner, carry out right side braking.
Its advantage is:
This brake activation valve need not the external force operation, and structure is simpler, and cost is lower, and is easy to maintenance.Fault rate reduces, and makes operations and maintenance simplification, structure practicability.
Description of drawings
Fig. 1 is structural representation of the present utility model.
The specific embodiment
A kind of brake activation valve comprises valve body 1, left spool 2 and right spool.
Valve body 1 offers oil-feed oil circuit (P) 4 and oil return circuit (T) 5.
Laterally zygomorphic left valve opening and the right valve opening of offering in the valve body 1.The upper end of oil-feed oil circuit 4 is communicated with left valve opening, and the lower end of oil-feed oil circuit 4 is communicated with right valve opening, and the upper end of oil return circuit 5 is communicated with left valve opening, and the lower end of oil return circuit 5 is communicated with right valve opening.
There are left flanged plate 6 and right flanged plate 7 in valve body 1 both sides bolt respectively.
The left spool 2 of installing in the valve opening of a left side, offer the first piston groove in the left side of left spool 2, the first ring platform 9 and the second ring platform 10 have been wholely set on the spool 2 of a left side, the first ring platform 9 is corresponding with the position of oil-feed oil circuit 4 and oil return circuit 5 respectively with the position of the second ring platform 10, left side spool 2 right-hand members are arranged with first spring, and the two ends of first spring are replaced mutually with the second ring platform 10 and right flanged plate 7 respectively.
First piston groove and first piston pole pair should be installed, and first piston 11 left sides are spacing by left flanged plate 6, and the position between first piston 11 and left spool 2 is first cavity 12.
Offer left spool bore 13 in the spool 2 of a left side, left spool bore 13 is through hole, comprises that first spool bore 14 and second spool bore, 15, the first spool bore 14 that are interconnected are axial hole, and second spool bore 15 is vertical mutually with first spool bore 14.
Top, valve body 1 middle part offers the left fuel-displaced oil circuit 8 that is connected with left valve opening.
Top, valve body 1 left side offers a left side that is communicated with first cavity 12 and comes oil circuit 3.
The right spool of installing in the right valve opening, offer second piston groove in the left side of right spool, be wholely set the 3rd ring platform 17 and Fourth Ring platform 18 on the right spool, the position of the 3rd ring platform 17 and Fourth Ring platform 18 is corresponding with the position of oil-feed oil circuit 4 and oil return circuit 5 respectively, right spool right-hand member is arranged with second spring, and the two ends of second spring are replaced mutually with Fourth Ring platform 18 and right flanged plate 7 respectively.
The corresponding installing with second piston rod of second piston groove, second piston, 19 left sides are spacing by left flanged plate 6, and the position between second piston 19 and right spool is second cavity 20.
Offer right spool bore in the right spool, right spool bore is through hole, comprises that the 3rd spool bore 21 and the 4th spool bore 22, the three spool bore 21 that are interconnected are axial hole, and the 3rd spool bore 21 is vertical mutually with the 4th spool bore 22.
Below, valve body 1 middle part offers the right fuel-displaced oil circuit 23 that is connected with right valve opening.
Below, valve body 1 left side offers the right side that is communicated with second cavity 20 and comes oil circuit 16.
Right flanged plate 7 is provided with seal ring with two valve opening junctions of valve body 1.
Be provided with seal ring respectively between two pistons and two valve openings.
Claims (1)
1. a brake activation valve comprises valve body (1), left spool (2) and right spool; It is characterized in that:
Valve body (1) offers oil-feed oil circuit (4) and oil return circuit (5);
Laterally zygomorphic left valve opening and the right valve opening of offering in the valve body (1); The upper end of oil-feed oil circuit (4) is communicated with left valve opening, and the lower end of oil-feed oil circuit (4) is communicated with right valve opening, and the upper end of oil return circuit (5) is communicated with left valve opening, and the lower end of oil return circuit (5) is communicated with right valve opening;
There are left flanged plate (6) and right flanged plate (7) in valve body (1) both sides bolt respectively;
Installing left spool (2) in the valve opening of a left side, the first piston groove is offered in left side at left spool (2), the first ring platform (9) and the second ring platform (10) have been wholely set on the left side spool (2), the first ring platform (9) is corresponding with the position of oil-feed oil circuit (4) and oil return circuit (5) respectively with the position of the second ring platform (10), left side spool (2) right-hand member is arranged with first spring, and the two ends of first spring are replaced mutually with the second ring platform (10) and right flanged plate (7) respectively;
First piston groove and first piston pole pair should be installed, and first piston (11) left side is spacing by left flanged plate (6), and the position between first piston (11) and left spool (2) is first cavity (12);
Offer left spool bore (13) in the left side spool (2), left spool bore (13) is through hole, comprises first spool bore (14) and second spool bore (15) that are interconnected;
Top, valve body (1) middle part offers the left fuel-displaced oil circuit (8) that is connected with left valve opening;
Top, valve body (1) left side offers a left side that is communicated with first cavity (12) and comes oil circuit (3);
The right spool of installing in the right valve opening, offer second piston groove in the left side of right spool, be wholely set the 3rd ring platform (17) and Fourth Ring platform (18) on the right spool, the position of the 3rd ring platform (17) and Fourth Ring platform (18) is corresponding with the position of oil-feed oil circuit (4) and oil return circuit (5) respectively, right spool right-hand member is arranged with second spring, and the two ends of second spring are replaced mutually with Fourth Ring platform (18) and right flanged plate (7) respectively;
The corresponding installing with second piston rod of second piston groove, second piston (19) left side is spacing by left flanged plate (6), and the position between second piston (19) and right spool is second cavity (20);
Offer right spool bore in the right spool, right spool bore is through hole, comprises the 3rd spool bore (21) and the 4th spool bore (22) that are interconnected;
Below, valve body (1) middle part offers the right fuel-displaced oil circuit (23) that is connected with right valve opening;
Below, valve body (1) left side offers the right side that is communicated with second cavity (20) and comes oil circuit (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320178658 CN203172616U (en) | 2013-04-11 | 2013-04-11 | Brake valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320178658 CN203172616U (en) | 2013-04-11 | 2013-04-11 | Brake valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203172616U true CN203172616U (en) | 2013-09-04 |
Family
ID=49069359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320178658 Expired - Fee Related CN203172616U (en) | 2013-04-11 | 2013-04-11 | Brake valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203172616U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246761A (en) * | 2016-08-31 | 2016-12-21 | 江西液压件股份有限公司 | A kind of two changements for steering cluth |
| CN106468292A (en) * | 2016-08-31 | 2017-03-01 | 柳工常州机械有限公司 | A kind of controlling organization of bull-dozer steering cluth |
-
2013
- 2013-04-11 CN CN 201320178658 patent/CN203172616U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246761A (en) * | 2016-08-31 | 2016-12-21 | 江西液压件股份有限公司 | A kind of two changements for steering cluth |
| CN106468292A (en) * | 2016-08-31 | 2017-03-01 | 柳工常州机械有限公司 | A kind of controlling organization of bull-dozer steering cluth |
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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: 20130904 Termination date: 20180411 |