CN203146792U - Power gear-shifting speed changing control system - Google Patents
Power gear-shifting speed changing control system Download PDFInfo
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- CN203146792U CN203146792U CN 201320170678 CN201320170678U CN203146792U CN 203146792 U CN203146792 U CN 203146792U CN 201320170678 CN201320170678 CN 201320170678 CN 201320170678 U CN201320170678 U CN 201320170678U CN 203146792 U CN203146792 U CN 203146792U
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- valve
- clutch
- speed change
- speed changing
- control system
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Abstract
Provided is a power gear-shifting speed changing control system. The power gear-shifting speed changing control system comprises a stop valve, a reversing operating valve, a forward gear clutch, a reverse gear clutch, a speed changing operating valve and speed changing clutches. A shuttle valve is arranged between the reversing operating valve and the speed changing operating valve, and a cushion valve is arranged between the speed changing operating valve and one of the speed changing clutches. Oil passes through the stop valve and the reversing operating valve in sequence to flow to the forward gear clutch or the reverse gear clutch, two oil outlets of the reversing operating valve are connected with two oil inlets of the shuttle valve, and an oil outlet of the shuttle valve is connected with an oil inlet of the speed changing operating valve. The power gear-shifting speed changing control system has the advantages that whether buffer is carried out or not is decided according to build-up pressure characteristic requirements of each clutch, different pressure build-up characteristics can be obtained aiming at different requirements of speed gears and different models, and thus the purpose that pressure control systems of the gears do not influence one another is achieved.
Description
Technical field
The utility model relates to a kind of shift control system of running mechanism power shfit, particularly a kind of power shfit shift control system of mechanical type control.
Background technique
The current driving force gear shift is used comparatively extensive in engineering machinery transmission, what all adopt basically is that hydraulic efficiency slide valve control gearbox clutch oil circuit break-make realizes gear shift, this bang-bang control meeting to oil circuit brings bigger shifting shock, impacts the life-span that conference influences operation comfort and the component of gear shift.In order to solve the impact phenomenon in the gearshift procedure, mainly be at working connection damping device to be set, hydraulic oil cushions oil pressure before entering each gear clutch, delay its pressure building-up time, though this scheme has played the effect of buffering to a certain extent, but owing to be at the enterprising row buffering of working connection, therefore has only a buffer time, but in the actual gearshift procedure, bottom gear is because the transmission torque ratio is bigger, the required shelves time is long, it is little that high gear is transmitted moment of torsion, required shift time is short, if at working connection the requirement that trimmer valve satisfies the longer buffer time of bottom gear is set, is combination time slow " waiting shelves " phenomenon to occur in the top gear gear shift then, if satisfy the requirement preferentially satisfied top gear certainly will can bring again impact in the bottom gear gearshift procedure comparatively violent, generally can take into account the shift time of low gear and top gear, can make the shift time of bottom gear shorter than actual demand like this, cause having in the gearshift procedure and significantly impact sense; The shift time of top gear is longer than actual demand, causes gear shift to be switched, but clutch is in conjunction with the phenomenon that lags behind, and this scheme makes maneuverability variation, efficient step-down, the degradation of transmission system.
Summary of the invention
Goal of the invention: the utility model purpose provides a kind of slowing down in the engineering machinery timing and impacts, simultaneously can guarantee that by setting different parameters the bottom gear gear shift do not have impact, the power shfit shift control system of the gear of top gear gear shift high efficiency smooth at the different shift characteristics of high bottom gear.
Technological scheme: a kind of power shfit shift control system, comprise cut-off valve, reversing maneuver valve, forward gear clutch, retreat a grade clutch, speed change control valve, speed change clutch, be provided with shuttle valve between described reversing maneuver valve and the speed change control valve, be provided with trimmer valve between described speed change control valve and the speed change clutch; Fluid flows to forward gear clutch or retreats a grade clutch through cut-off valve and reversing maneuver valve successively, and two oil outlets of reversing maneuver valve are connected with two filler openings of shuttle valve respectively, and the oil outlet of shuttle valve is connected with the filler opening of speed change control valve.
Fluid enters the reversing maneuver valve by cut-off valve, fluid is directly flowed to forward gear clutch or is retreated a grade clutch by the reversing maneuver valve during commutation, to speed change control valve entrance, namely the pressure oil-source of speed change control valve is taken from the outlet of reversing maneuver valve to another part fluid of reversing maneuver valve output simultaneously through shuttle valve; Speed change control valve output circuit is several to be adjusted according to different gear quantity, then directly export corresponding gear clutch to through the outlet of speed change control valve for the speed stage that does not need to cushion, export corresponding gear clutch for what needs cushioned after cushioning to through trimmer valve, and after the control by shuttle valve can realize that even the buffering gear hangs up, cut-out trimmer valve owing to the speed threshold oil sources during switching direction gear resets, trimmer valve cushions again behind the switching direction shelves, still guarantee to need the gear clutch pressure of buffering steadily to set up, the impact phenomenon of avoiding the difference because of maneuverability pattern to cause.
No matter from arbitrary output oil port pressure oil output of reversing maneuver valve, seal another output oil port by promoting shuttle valve spool, open simultaneously and being connected of speed change control valve filler opening, realization is to the reliability of speed change control valve delivery pressure oil sources, simultaneously in the switching direction shelves process, when direction gear control valve is in meta during moment, the inlet pressure of speed change control valve all can connect fuel tank and carry out pressure release, trimmer valve resets, after the reversing maneuver valve has pressure oil output, trimmer valve can carry out action of giving again, and the assurance delivery pressure is steadily set up.
Described trimmer valve comprises buffering spool, accumulator assembly and one-way throttle valve; Described accumulator assembly comprises adjusting pressuring valve core, energy storage piston and pressure adjusting spring, is connected by pressure adjusting spring between described adjusting pressuring valve core and the energy storage piston.Parameters such as damping hole size that can be by regulating one-way throttle valve, pressure adjusting spring, energy storage piston stroke can play effective control to buffer time, can require to obtain different pressure at the difference of each speed stage and different type of machines and set up characteristic, thereby realize that each gear control pressurer system is independent of each other.
For reasonable Arrangement valve block structure, described reversing maneuver valve and speed change control valve are integrated on the control valve piece; Described cut-off valve, shuttle valve and trimmer valve are integrated on the buffering control valve.
Beneficial effect: the utility model requires to determine whether cushion according to the build-up pressure characteristic of each clutch, can require to obtain different pressure at the difference of each speed stage and different type of machines and set up characteristic, thereby realize that each gear control pressurer system is independent of each other.
Description of drawings
Fig. 1 is hydraulic schematic diagram of the present utility model;
Fig. 2 is the utility model control valve block structure schematic representation;
Fig. 3 is the utility model buffering control valve structural representation.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in Figure 1, a kind of power shfit shift control system, comprise cut-off valve 1, reversing maneuver valve 2, forward gear clutch 3, retreat grade clutch 4, speed change control valve 5, speed change clutch 6, be provided with shuttle valve 7 between described reversing maneuver valve 2 and the speed change control valve 5, be provided with trimmer valve 8 between described speed change control valve 5 and the speed change clutch 6; Fluid flows to forward gear clutch 3 or retreats grade clutch 4 through cut-off valve 1 and reversing maneuver valve 2 successively, and two oil outlets of reversing maneuver valve 2 are connected with two filler openings of shuttle valve 7 respectively, and the oil outlet of shuttle valve 7 is connected with the filler opening of speed change control valve 5.
Fluid enters reversing maneuver valve 2 by cut-off valve 1, fluid is directly flowed to forward gear clutch 3 or is retreated grade clutch 4 by reversing maneuver valve 2 during commutation, to speed change control valve 5 entrances, namely the pressure oil-source of speed change control valve 5 is taken from the outlet of reversing maneuver valve 2 to another part fluid of reversing maneuver valve 2 outputs simultaneously through shuttle valve 7; Speed change control valve 5 output circuits are several to be adjusted according to different gear quantity, then directly export corresponding gear clutch to through 5 outlets of speed change control valve for the speed stage that does not need to cushion, export corresponding gear clutch for what needs cushioned after cushioning to through trimmer valve 8, and after the control by shuttle valve 7 can realize that even the buffering gear hangs up, cut-out trimmer valve 8 owing to the speed threshold oil sources during switching direction gear resets, trimmer valve 8 cushions again behind the switching direction shelves, still guarantee to need the gear clutch pressure of buffering steadily to set up, the impact phenomenon of avoiding the difference because of maneuverability pattern to cause.
No matter from arbitrary output oil port pressure oil output of reversing maneuver valve 2, seal another output oil port by promoting shuttle valve 7 spools, open simultaneously and being connected of speed change control valve 5 filler openings, realization is to the reliability of speed change control valve 5 delivery pressure oil sources, simultaneously in the switching direction shelves process, when direction gear control valve is in meta during moment, the inlet pressure of speed change control valve 5 all can connect fuel tank and carry out pressure release, trimmer valve 8 resets, after reversing maneuver valve 2 has pressure oil output, trimmer valve 8 can carry out action of giving again, and the assurance delivery pressure is steadily set up.
As shown in Figure 3, described trimmer valve 8 comprises buffering spool 81, accumulator assembly 82 and one-way throttle valve 83; Described accumulator 82 assemblies comprise adjusting pressuring valve core 84, energy storage piston 85 and pressure adjusting spring 86, are connected by pressure adjusting spring 86 between described adjusting pressuring valve core 84 and the energy storage piston 85.Parameters such as damping hole size that can be by regulating one-way throttle valve 83, pressure adjusting spring 86, energy storage piston 85 strokes can play effective control to buffer time, can require to obtain different pressure at the difference of each speed stage and different type of machines and set up characteristic, thereby realize that each gear control pressurer system is independent of each other.
As shown in Figure 3, described trimmer valve 8 comprises the oil suction chamber (shuttle valve provides pressure oil) that is arranged on the valve body, for trimmer valve provides pressure source, oil suction chamber is communicated with the circular groove on the buffering spool 81, the pressure of this circular groove enters the back cavity of adjusting pressuring valve core 84 behind the decompressing groove of adjusting pressuring valve core 84 and valve body, simultaneously enter the accumulator back cavity through one-way throttle valve 83, since through the formation of throttle valve pressure reduction, make every effort to overcome clothes pressure adjusting spring 86 and the accumulator back cavity active force that act on adjusting pressuring valve core 84 back cavities turn down decompressing groove, along with turning down gradually of decompressing groove, flow to corresponding the reducing of accumulator back cavity pressure oil flow, pressure reduction reduces, energy storage piston 85 areas are greater than adjusting pressuring valve core 84 areas simultaneously, decompressing groove is opened again when two cavity pressure differences are not enough to overcome spring force, enter clutch pressure circulation like this and increase progressively, guaranteed the stationarity that pressure is set up.Because the effect of one-way throttle valve 83, the fluid in clutch and accumulation of energy chamber is avoided next action gear is played interference effect through the process of one-way valve fast pressure relief in process out of supply.
Shown in Fig. 2,3, for reasonable Arrangement valve block structure, described reversing maneuver valve 2 and speed change control valve 5 are integrated on the control valve piece 9; Described cut-off valve 1, shuttle valve 7 and trimmer valve 8 are integrated on the buffering control valve 10.
Claims (3)
1. power shfit shift control system, comprise cut-off valve (1), reversing maneuver valve (2), forward gear clutch (3), retreat a grade clutch (4), speed change control valve (5), speed change clutch (6), it is characterized in that: be provided with shuttle valve (7) between described reversing maneuver valve (2) and the speed change control valve (5), be provided with trimmer valve (8) between described speed change control valve (5) and the speed change clutch (6); Fluid passes through cut-off valve (1) successively and reversing maneuver valve (2) flows to forward gear clutch (3) or retreats a grade clutch (4), two oil outlets of reversing maneuver valve (2) are connected with two filler openings of shuttle valve (7) respectively, and the oil outlet of shuttle valve (7) is connected with the filler opening of speed change control valve (5).
2. power shfit shift control system as claimed in claim 1 is characterized in that: described trimmer valve (8) comprises buffering spool (81), accumulator assembly (82) and one-way throttle valve (83); Described accumulator assembly (82) comprises adjusting pressuring valve core (84), energy storage piston (85) and pressure adjusting spring (86), is connected by pressure adjusting spring (86) between described adjusting pressuring valve core (84) and the energy storage piston (85).
3. power shfit shift control system as claimed in claim 1, it is characterized in that: described reversing maneuver valve (2) and speed change control valve (5) are integrated on the control valve piece (9); Described cut-off valve (1), shuttle valve (7) and trimmer valve (8) are integrated on the buffering control valve (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320170678 CN203146792U (en) | 2013-04-08 | 2013-04-08 | Power gear-shifting speed changing control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320170678 CN203146792U (en) | 2013-04-08 | 2013-04-08 | Power gear-shifting speed changing control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203146792U true CN203146792U (en) | 2013-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320170678 Expired - Fee Related CN203146792U (en) | 2013-04-08 | 2013-04-08 | Power gear-shifting speed changing control system |
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| Country | Link |
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| CN (1) | CN203146792U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195920A (en) * | 2013-04-08 | 2013-07-10 | 江苏柳工机械有限公司 | Power gear-shifting speed-change control system |
| CN104776218A (en) * | 2015-03-10 | 2015-07-15 | 四川大学 | Quick-shift hydraulic system |
-
2013
- 2013-04-08 CN CN 201320170678 patent/CN203146792U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195920A (en) * | 2013-04-08 | 2013-07-10 | 江苏柳工机械有限公司 | Power gear-shifting speed-change control system |
| CN104776218A (en) * | 2015-03-10 | 2015-07-15 | 四川大学 | Quick-shift hydraulic system |
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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 |
Granted publication date: 20130821 Termination date: 20200408 |
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| CF01 | Termination of patent right due to non-payment of annual fee |