CN203770614U - Automatic speed changer shifting valve - Google Patents
Automatic speed changer shifting valve Download PDFInfo
- Publication number
- CN203770614U CN203770614U CN201320773344.7U CN201320773344U CN203770614U CN 203770614 U CN203770614 U CN 203770614U CN 201320773344 U CN201320773344 U CN 201320773344U CN 203770614 U CN203770614 U CN 203770614U
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- China
- Prior art keywords
- valve
- mouth
- pressure
- spool
- oil duct
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- Expired - Lifetime
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- 230000005540 biological transmission Effects 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 6
- 239000002828 fuel tank Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Control Of Transmission Device (AREA)
Abstract
The utility model relates to the technical field of speed changers, in particular to an automatic speed changer shifting valve. The automatic speed changer shifting valve comprises a reducing valve, a reducing valve seat, a valve body, a valve element, a back cover, a reset spring and a pressure measuring unit. The reducing valve is fixed to one end of the valve body through the reducing valve seat, and the back cover is fixed to the other end of the valve body. The valve element is arranged inside the valve body, one end of the valve element is arranged on the right side of the reducing valve, the other end of the valve element is arranged on the left side of the back cover, and the reset spring is arranged between the valve element and the back cover. The pressure measuring unit is fixed to the back cover. According to the automatic speed changer shifting valve, the pressure measuring unit is fixed to the back cover and can measure the pressure of shifting oil at a port A in real time, and therefore the closed-loop control on the speed changer shifting valve can be achieved, and the shifting precision of the automatic speed changer valve is improved.
Description
Technical field
The utility model relates to speed changer technical field, particularly a kind of automatic transmission shift valve.
Background technique
Lot of domestic and international automatic transmission mainly contains reduction valve and reversing slide valve composition with shift valve at present.Working principle is: according to the specific requirement of gearshift, reduction valve provides commutation required active force as pilot valve to reversing slide valve, make shift valve commutation, high pressure oil acts on clutch plunger through shift valve, make clutch combination, a certain shift valve is closed simultaneously, and clutch separation, realizes gearshift function.Some shift valve, for improving control accuracy, is provided with displacement transducer, carries out closed loop control; Also have some by structurally increasing the realizable force feedbacks such as feedback spring bar or torque motor.But, current speed changer with shift valve all can not Real-Time Monitoring gearshift oil pressure, cause the precision of gearshift not high.
Model utility content
Technical problem to be solved in the utility model be to provide one can Real-Time Monitoring gearshift oil pressure, according to gearshift oil pressure, shift process is adjusted, to improve the automatic transmission shift valve of gearshift precision.
For solving the problems of the technologies described above, the utility model provides a kind of automatic transmission shift valve, comprising: reduction valve, valve base of pressure reducing valve, valve body, spool, bonnet, Returnning spring and pressure measuring unit.Described reduction valve is fixed on one end of described valve body by described valve base of pressure reducing valve; Described bonnet is fixed on the other end of described valve body; Described spool is arranged on described valve inner, and one end of described spool is arranged on the right side of described reduction valve, and the other end is arranged on the left side of described bonnet, and is provided with described Returnning spring between described spool and described bonnet.On described valve body, be provided with A mouth, P mouth, T mouth, body cavity, the first oil duct, the second oil duct and the 3rd oil duct; Described body cavity runs through described A mouth, P mouth and T mouth successively, and described spool is arranged on described body cavity, is realized the conducting between described A mouth and P mouth, A mouth and T mouth or is closed by the slip of described spool; Described A mouth is communicated with piston, and described A mouth is communicated with the right-hand member of described spool by described the first oil duct; Described P mouth is connected with oil pump, and described P mouth is communicated with described valve base of pressure reducing valve by described the second oil duct; Described T mouth is connected with fuel tank, and described T mouth is communicated with described valve base of pressure reducing valve by described the 3rd oil duct.Described pressure measuring unit is fixed on described bonnet, for detection of the gearshift oil pressure of described A mouth.
Further, also comprise sealing gasket, between described Pressure relief valve seat and described valve body, be provided with described sealing gasket between described bonnet and described valve body.
Further, described reduction valve is threeway proportional pressure-reducing valve.
The automatic transmission shift valve that the utility model provides is fixed with pressure measuring unit on bonnet, can measure the gearshift oil pressure of A mouth in real time, thereby realize the closed loop control of shift of transmission valve, improves the gearshift precision of automatic transmission shift valve.
Brief description of the drawings
The automatic transmission shift valve arrangement schematic diagram that Fig. 1 provides for the utility model embodiment;
The inner oil duct schematic diagram of automatic transmission shift valve that Fig. 2 provides for the utility model embodiment.
Embodiment
Referring to Fig. 1 and Fig. 2, a kind of automatic transmission shift valve that the utility model embodiment provides, comprising: reduction valve 1, valve base of pressure reducing valve 2, valve body 5, spool 12, bonnet 10, Returnning spring 13, pressure measuring unit 11 and sealing gasket 4.In the present embodiment, reduction valve 1 is threeway proportional pressure-reducing valve, threeway proportional pressure-reducing valve is fixed on one end of valve body 5 by valve base of pressure reducing valve 2, be specially: threeway proportional pressure-reducing valve is fastened on valve base of pressure reducing valve 2 by two M4 socket head screws, valve base of pressure reducing valve 2 is fastened on one end of valve body 5 by two M5 socket head screws; Bonnet 10 is fixed on the other end of valve body 5 by four M5 socket head screws.Spool 12 is arranged on valve body 5 inside, and wherein, one end of spool 12 is arranged on the right side of threeway proportional pressure-reducing valve, and the other end is arranged on the left side of bonnet 10, and is provided with Returnning spring 13 between spool 12 and bonnet 10.On valve body 5, be provided with A mouth 7, P mouth 8, T mouth 6, body cavity, the first oil duct 14, the second oil duct 15 and the 3rd oil duct 16.Body cavity runs through A mouth 7, P mouth 8 and T mouth 6 successively, and spool 12 is arranged on body cavity, is realized the conducting between T mouth 6 and A mouth 7, A mouth 7 and P mouth 8 or closes in the slip of body cavity by spool 12.A mouth 7 is communicated with piston, and A mouth 7 is communicated with the right-hand member of spool 12 by the first oil duct 14.P mouth 8 is connected with oil pump, and P mouth 8 is communicated with valve base of pressure reducing valve 2 by the second oil duct 15.T mouth 6 is connected with fuel tank, and T mouth 6 is communicated with valve base of pressure reducing valve 2 by the 3rd oil duct 16.In valve base of pressure reducing valve 2, be provided with the 4th oil duct and the 5th oil duct, the 4th oil duct is communicated with T hole and the 3rd oil duct 16 of threeway proportional pressure-reducing valve respectively; The 5th oil duct is communicated with the second oil duct 15; In the 4th oil duct and the 5th oil duct, be provided with steel ball 3.Pressure measuring unit 11 is fixed on bonnet 10, is specially: on pressure measuring unit 11, be provided with bolt structure, have the screw corresponding with the thread mechanism of pressure measuring unit 11 on bonnet 10, pressure measuring unit 11 is screwed onto on bonnet 10; Pressure measuring unit 11 is for detection of the gearshift oil pressure of A mouth 7.In the present embodiment, between Pressure relief valve seat 2 and valve body 5, be provided with sealing gasket 4 between bonnet 10 and valve body 5; Pressure measuring unit 11 is pressure transducer.Spool 12 packs into from the left end of valve body 5, and while work, Returnning spring 13 is pressed onto spool 12 on valve base of pressure reducing valve 2.
Referring to Fig. 1 and Fig. 2, in application process, according to the demand of gearshift, controller provides certain dutycycle (being input signal) for threeway proportional pressure-reducing valve, the main oil pressure that oil pump flows out flows into threeway proportional pressure-reducing valve by P mouth 8, the second oil duct 15 and Pressure relief valve seat 2, reduces pressure.After reduction valve 1, can obtain an oil pressure proportional to input signal, this oil pressure acts on the left end of spool 12, promotes spool 12 and moves to right, and by the size of control inputs signal, just can control the displacement of spool 12, realizes the control of shift valve opening degree.In the process moving to right at spool 12, between A mouth 7 and T mouth 6, close, then between P mouth 8 and A mouth 7, connect, fluid flows into piston cavity through A mouth 7, makes clutch combination, and some shift valves are closed simultaneously, make the clutch separation of its control, thereby realizes gearshift.The oil pressure (oil pressure of shifting gears) of A mouth 7, feed back to the right-hand member of spool 12 by the first oil duct 14, spool 12 is carried out to the feedback of power, feedback fluid acts on spool 12 right-hand members together with spring force, the control oil providing with reduction valve 1 forms equilibrium of forces, is controlling spool 12 and is reaching a state in equilibrium position fluctuation; Pressure transducer detects the oil pressure that is fed back to spool 12 right-hand members by A mouth 7 simultaneously, can realize the closed loop control of shift valve.Wherein, spool 12 at the wave process of equilibrium position is: in the time that gearshift oil pressure pressure is lower, spool 12 moves to right, and between P mouth 8 and A mouth 7, connects, and gearshift oil pressure raises; In the time that gearshift oil pressure pressure is higher, spool 12 can move to left, between P mouth 8 and A mouth 7, close, but between A mouth 7 and T mouth 6 also in closed condition, ensure the not pressure release suddenly of gearshift oil pressure, make clutch still keep the state of combination, while only having gearshift oil pressure height to a certain extent, between A mouth 7 and T mouth 6, just connect, ensure that clutch can not transship.Due to the fluctuation of load and oil pressure, spool 12 can equilibrium position ceaselessly fluctuation fast.When shift valve is closed, the fluid of spool 12 left ends, by the T mouth 6 of threeway proportional pressure-reducing valve, flow to fuel tank through the 4th oil duct and T mouth 6 in valve base of pressure reducing valve 2; And spool 12 moves to left, between P mouth 8 and A mouth 7, close, between A mouth 7 and T mouth 6, to connect, the fluid in clutch active chamber flows back to fuel tank through T mouth 6, clutch separation.
The utility model embodiment has following beneficial effect:
1, can measure the gearshift oil pressure of A mouth in real time, thereby realize the closed loop control of shift of transmission valve, improve the gearshift precision of automatic transmission shift valve.
2, simple in structure, be convenient in industrial industrialization.
It should be noted last that, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to example, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (4)
1. an automatic transmission shift valve, comprising: reduction valve, valve base of pressure reducing valve, valve body, spool, bonnet and Returnning spring, it is characterized in that, and also comprise: pressure measuring unit;
Described reduction valve is fixed on one end of described valve body by described valve base of pressure reducing valve; Described bonnet is fixed on the other end of described valve body; Described spool is arranged on described valve inner, and one end of described spool is arranged on the right side of described reduction valve, and the other end is arranged on the left side of described bonnet, and is provided with described Returnning spring between described spool and described bonnet;
On described valve body, be provided with A mouth, P mouth, T mouth, body cavity, the first oil duct, the second oil duct and the 3rd oil duct; Described body cavity runs through described A mouth, P mouth and T mouth successively, and described spool is arranged on described body cavity, is realized the conducting between described A mouth and P mouth, A mouth and T mouth or is closed by the slip of described spool; Described A mouth is communicated with piston, and described A mouth is communicated with the right-hand member of described spool by described the first oil duct; Described P mouth is connected with oil pump, and described P mouth is communicated with described valve base of pressure reducing valve by described the second oil duct; Described T mouth is connected with fuel tank, and described T mouth is communicated with described valve base of pressure reducing valve by described the 3rd oil duct;
Described pressure measuring unit is fixed on described bonnet, for detection of the gearshift oil pressure of described A mouth.
2. automatic transmission shift valve according to claim 1, is characterized in that, also comprises sealing gasket, between described Pressure relief valve seat and described valve body, be provided with described sealing gasket between described bonnet and described valve body.
3. automatic transmission shift valve according to claim 1, is characterized in that, described reduction valve is threeway proportional pressure-reducing valve.
4. automatic transmission shift valve according to claim 1, is characterized in that, described pressure measuring unit is pressure transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320773344.7U CN203770614U (en) | 2013-11-28 | 2013-11-28 | Automatic speed changer shifting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320773344.7U CN203770614U (en) | 2013-11-28 | 2013-11-28 | Automatic speed changer shifting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203770614U true CN203770614U (en) | 2014-08-13 |
Family
ID=51287805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320773344.7U Expired - Lifetime CN203770614U (en) | 2013-11-28 | 2013-11-28 | Automatic speed changer shifting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203770614U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611548A (en) * | 2018-12-03 | 2019-04-12 | 湖北航天技术研究院特种车辆技术中心 | A kind of shift control valve |
-
2013
- 2013-11-28 CN CN201320773344.7U patent/CN203770614U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611548A (en) * | 2018-12-03 | 2019-04-12 | 湖北航天技术研究院特种车辆技术中心 | A kind of shift control valve |
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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: 20140813 |
|
| CX01 | Expiry of patent term |