CN110701209A - Synchronous gear shifting wet hydraulic clutch for automatic gearbox - Google Patents
Synchronous gear shifting wet hydraulic clutch for automatic gearbox Download PDFInfo
- Publication number
- CN110701209A CN110701209A CN201911021338.4A CN201911021338A CN110701209A CN 110701209 A CN110701209 A CN 110701209A CN 201911021338 A CN201911021338 A CN 201911021338A CN 110701209 A CN110701209 A CN 110701209A
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- ring
- hub
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims description 114
- 230000001050 lubricating effect Effects 0.000 claims description 20
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 238000012856 packing Methods 0.000 claims description 5
- 239000010720 hydraulic oil Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 12
- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 238000005461 lubrication Methods 0.000 abstract 1
- 238000005245 sintering Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000010425 asbestos Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 229910052895 riebeckite Inorganic materials 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000008713 feedback mechanism Effects 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/06—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch
- F16D25/062—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces
- F16D25/063—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially
- F16D25/0635—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs
- F16D25/0638—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs with more than two discs, e.g. multiple lamellae
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/12—Details not specific to one of the before-mentioned types
- F16D25/123—Details not specific to one of the before-mentioned types in view of cooling and lubrication
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
The invention discloses a synchronous shifting wet hydraulic clutch for an automatic gearbox, which comprises a power input and output component, a friction pair assembly, a control execution component, a synchronous feedback component and a sealing component. The invention is an integrated design, integrates four parts of control, execution, cooling and lubrication, improves the working stability and transmission efficiency of the clutch through the integrated design, reduces the daily maintenance cost, saves the installation space, and has more simple, convenient and flexible use method. The friction pair is a wet multi-disc structure formed by alternately installing steel and sintered/paper substrates, has high specific pressure, large friction coefficient, small wear coefficient and high heat capacity, and has the characteristics of determining large torque generated by small volume of the clutch.
Description
Technical Field
The invention relates to the technical field of clutches, in particular to a synchronous shifting wet hydraulic clutch for an automatic gearbox.
Background
Clutches are common components in mechanical transmissions, and allow the transmission to be disengaged or engaged at any time. The traditional clutch is not reasonable enough in structural design, low in working stability and transmission efficiency, high in daily maintenance cost and inconvenient to install. Therefore, a clutch with high stability and transmission efficiency, low maintenance cost and simple and flexible use method is urgently needed.
Disclosure of Invention
The invention aims to provide a synchronous gear shifting wet hydraulic clutch for an automatic gearbox, which is used for improving the anti-disorder capacity, stability and transmission efficiency of the clutch, reducing the development cost of the automatic gearbox and saving the installation space.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a synchronous shifting wet hydraulic clutch for an automatic gearbox, which comprises:
the power input and output assembly comprises a clutch hub, an outer gear ring A and an outer gear ring B, wherein an inner hole of the clutch hub is used for connecting a central power shaft, a stop ring is sleeved on the excircle of the clutch hub, and the stop ring is limited by a retaining ring; the clutch hub is simultaneously connected with a clutch A and a clutch B, the clutch A and the clutch B are respectively sleeved on the excircle of the clutch hub through a clutch A friction pair and a clutch B friction pair and are respectively positioned on two sides of the stop ring, and the outer gear ring A and the outer gear ring B are respectively connected with the clutch A friction pair and the clutch B friction pair; a lubricating and cooling oil path is processed in the clutch hub, a throttle plug is pressed at the upper end of a throttle hole, axial cooling and lubricating holes which are uniformly distributed on the circumference are processed at the outer rim of the clutch hub, and ball plugs are arranged at two ends of each axial cooling and lubricating hole;
the control execution component comprises a clutch A control oil cylinder, a clutch B control oil cylinder and an emptying one-way valve, wherein the clutch A control oil cylinder and the clutch B control oil cylinder are respectively fixed on the left end surface and the right end surface of the clutch hub through bolts; the clutch A control oil cylinder comprises a compression cylinder cover, a piston type pressing plate and a cylinder sleeve, the compression cylinder cover is sleeved on a short boss of the cylinder sleeve, the piston type pressing plate is sleeved on the compression cylinder cover and the excircle of the cylinder sleeve, and the emptying one-way valves are installed between the compression cylinder cover and the cylinder sleeve and are symmetrically arranged in the circumferential direction; the clutch B control oil cylinder and the clutch A control oil cylinder are identical in structure and are symmetrically arranged;
the synchronous feedback component comprises a piston common return spring, an A2 balance oil cavity and a B2 balance oil cavity, the piston common return spring is installed in a circumferential axial hole at the spoke of the clutch hub, and the piston common return spring is connected between a piston type pressure plate of the clutch A control oil cylinder and a piston type pressure plate of the clutch B control oil cylinder in a compression state; the A2 balance oil chamber is enclosed by the clutch A control oil cylinder and the clutch hub, the B2 balance oil chamber is enclosed by the clutch B control oil cylinder and the clutch hub, and the A2 balance oil chamber and the B2 balance oil chamber are connected in series and share one path of oil liquid control.
Optionally, an external spline is machined on the outer circle of the clutch hub and used for being connected with the friction pair assembly, a clamp spring groove is machined in the middle of the external spline, and the stop ring is sleeved on the external spline through an internal spline.
Optionally, threaded holes are formed in two end faces of the clutch hub, and the threaded holes are evenly distributed in the circumference and used for installing the clutch A control oil cylinder and the clutch B control oil cylinder.
Optionally, the friction pair assembly comprises a sintering \ paper substrate and steel sheets, and the sintering \ paper substrate and the steel sheets are alternately sleeved on the external spline.
Optionally, still include the seal bush ring, be provided with a plurality of radial circumference holes on the seal bush ring, the seal bush ring is set in compress tightly in the hole of cylinder cap, the seal bush ring can with the excircle transitional coupling of central power axle forms annular seal groove, with control hydraulic oil by the radial hole warp of central power axle radial circumference hole gets into clutch A control cylinder and/or clutch B control cylinder.
Optionally, the cylinder sleeve and the outer circular groove of the compression cylinder cover are respectively sleeved with a first O-ring and a check ring.
Optionally, a second O-ring is disposed in the rim bore groove of the clutch hub.
Optionally, the inner friction plate of the clutch a and the inner friction plate of the clutch B are both driven by the clutch hub.
Compared with the prior art, the invention has the following technical effects:
the synchronous shifting wet hydraulic clutch for the automatic gearbox adopts a feedback design of synchronous action linkage of two clutches, so that the possibility of gear shifting is avoided, and the shifting speed is improved as the feedback time of any one clutch is saved; the control execution component and the synchronous feedback component adopt an integrated design, the working stability and the transmission efficiency of the clutch are improved through the integrated design, the daily maintenance cost is greatly reduced, the installation space is saved, and the use method is more simple, convenient and flexible; the clutch is in wet operation, and a lubricating and cooling device is integrated, so that the working reliability is improved.
Meanwhile, the friction pair comprises a steel sheet and a sintered/paper substrate, is of a wet multi-sheet structure, has high specific pressure, large friction coefficient, small wear coefficient and high heat capacity, and has the characteristics of small volume and large generated torque of the clutch, the combined structure can generate high torque under very small inertia, basically does not need maintenance, is made of metal sintered materials, does not contain asbestos components and can not pollute the environment, the ratio of the dynamic friction coefficient to the static friction coefficient of the multi-sheet structure is small, and the meshing balance can not generate noise.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic cross-sectional view of a wet hydraulic clutch for a synchronous shift transmission according to the present invention;
FIG. 2 is a schematic view of an installation structure of a wet hydraulic clutch for synchronous shifting of an automatic transmission according to the present invention;
wherein the reference numerals are: 1-sinter/paper substrate; 2-steel sheet; 3-a stop ring; 4. 19-a retainer ring; 5. 12-piston platen; 6. 14-evacuation check valve; 7. 15-pressing the cylinder cover; 8. 16-cylinder liner; 9. 17-a seal liner ring; 10-a first O-ring; 11-piston common return spring; 13-a clutch hub; 18-ball blocking; 20-a throttle plug; 21-outer gear ring B; 22-external gear ring A; 23. a second O-ring; 24-lubricating cooling oil path; 25-A2 balance oil chamber; 26-B2 balance oil chamber; 27-A1 oil chamber; 28-B1 oil chamber; 29-orifice.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1 to 2, the present embodiment provides a synchronous shifting wet hydraulic clutch for an automatic transmission, including a power input/output assembly, a control execution component and a synchronous feedback component; wherein,
the power input-output assembly includes a clutch hub 13, an outer ring gear B21, and an outer ring gear a 22. The clutch hub 13 serves as a clutch main body, and the clutch A, B shares the same clutch hub 13. The inner hole of the clutch hub 13 is provided with a spline or a flat key for connecting a central power shaft. The excircle of the clutch hub 13 is provided with a spline for connecting a steel sheet 2 fixed with the internal spline. A clamp spring groove is processed in the middle of an external spline of the clutch hub 13, the stop ring 3 is sleeved on the external spline of the clutch hub 13 through the internal spline and limited by the retainer ring 4, the clutch hub 13 is divided into a left part and a right part, and friction pair assemblies of the clutch A, B are respectively sleeved on the left side and the right side of the clutch hub 13. Threaded holes which are uniformly distributed on the circumference are processed on two end faces of the clutch hub 13 and are used for connecting and fixing the clutch A control oil cylinder and the clutch B control oil cylinder. A lubricating and cooling oil passage 24 is formed in the clutch hub 13, and a throttle plug 20 is press-fitted to an upper end of a throttle hole 29 to maintain oil pressures of the a2 balance oil chamber 25 and the B2 balance oil chamber 26. The outer rim of the clutch hub 13 is provided with axial cooling and lubricating holes which are uniformly distributed on the circumference, the two ends of the clutch hub are plugged by ball plugs 18, and lubricating and cooling oil flows to the friction pair component through a plurality of radial small holes to provide lubricating and cooling for the steel sheet 2 and the sintering/paper substrate 1. The outer gear ring A22 is connected with the outer friction plate sintering/paper substrate 1 of the clutch A, and the outer gear ring B21 is connected with the sintering/paper substrate 1 of the clutch B. The outer ring gear A, B may be the power input or output member, respectively, and the clutch hub 13 may be the power input or output member.
Wherein, the friction pair component consists of a sintered paper substrate 1 and a steel sheet 2. The inner friction plate steel sheet 2 is used in each clutch, the steel sheet 2 is driven by the clutch hub 13, and the outer friction plate sintering/paper substrate 1 is driven by the outer gear ring A, B. The inner friction plate or the outer friction plate can be a driving part or a driven part, and the inner friction plate and the outer friction plate can be made of friction materials, which depends on the use working condition of the gearbox and the working characteristics of the clutch. The friction plate must be matched with other driving parts, and the friction pair of the friction plate depends on the torque of the clutch. The sintered paper substrate 1 and the steel sheet 2 in the friction pair are alternately sleeved on the external spline of the clutch hub 13.
The control execution components comprise a clutch A control cylinder, a clutch B control cylinder and an emptying one-way valve 6/14, and can respectively control the engagement and the disengagement of the clutch A, B. The clutch A control oil cylinder and the clutch B control oil cylinder are respectively fixed on the left side and the right side of the clutch hub 13 through bolts. The clutch A control oil cylinder consists of a pressing cylinder cover 7, a piston type pressing plate 5 and a cylinder sleeve 8, and the clutch B control oil cylinder consists of a pressing cylinder cover 15, a piston type pressing plate 12 and a cylinder sleeve 16. A first O-shaped ring 10 and a retainer ring 19 are respectively sleeved in the cylinder sleeve 8/16 and the outer circular groove of the pressing cylinder cover 7/15; the compression cylinder cover 7/15 is sleeved on the short boss of the cylinder sleeve 8/16, and the piston pressure plate 5/12 is sleeved on the outer circle of the compression cylinder cover 7/15 and the cylinder sleeve 8/16. The exhaust check valves 6/14 are arranged symmetrically in the circumferential direction between the hold-down cylinder cover 7/15 and the cylinder liner 8/16. Oil in the A1 oil chamber 27 and the B1 oil chamber 28 is drained under the working condition of high-speed rotation, and misoperation of the clutch A control oil cylinder and the clutch B control oil cylinder is prevented. The clutch a control cylinder and the clutch B control cylinder are fixed to the left and right end faces of the clutch hub 13 by bolts, respectively.
The synchronous feedback component comprises a common piston return spring 11, a common piston return spring A2 balance oil cavity 25 and a common piston return oil cavity B2, which are common to the cylinder pistons of the clutch A and the clutch B, wherein the common piston return spring 11 is arranged in a circumferential axial hole at a spoke of the clutch hub 13, and the appropriate compression amount is selected according to the size of the clutch. To reset the piston pressure plate 5 and piston pressure plate 12 of the clutch A, B. The a2 balance oil chamber 25 and the B2 balance oil chamber 26 are formed by a cavity formed by the combination of the control cylinder of the clutch A, B and the clutch hub 13. The A2 balance oil chamber 25 and the B2 balance oil chamber 26 are sealed by a second O-ring 23 mounted in a rim bore groove of the clutch hub 13. The a2 balance oil chamber 25, B2 balance oil chamber 26, and piston common return spring 11 together ensure rapid disengagement of clutch A, B.
Meanwhile, the embodiment also comprises a sealing component which consists of a sealing liner ring 9/17 and a pressing cylinder cover 7/15. The packing ring 9/17 is embedded in the inner hole of the pressing cylinder cover 7/15. The seal lining ring 9/17 is in transition fit with the excircle of the central power shaft to form an annular seal groove, and hydraulic oil is controlled to enter the control oil cylinder of the clutch A and the control oil cylinder of the clutch B from a radial hole of the power shaft through a radial circumferential hole of the seal lining ring 9/17, so that the effects of sealing and leakage prevention are achieved.
For a more clear description of the embodiment of the invention, reference is made to fig. 2 for an example of a dual countershaft four-speed automatic transmission incorporating a synchronously shifted wet hydraulic clutch.
The wet hydraulic clutch for the automatic transmission of the present embodiment is a wet hydraulic clutch for synchronous shifting, and the clutch A, B has two states of being disengaged and engaged. The A2 balance oil chamber 25 and the B2 balance oil chamber 26 are respectively positioned on the back of the A1 oil chamber 27 and the B1 oil chamber 28. In a neutral state, oil in the oil cavities 27 and 28 of the A1 and the B1 of the clutch A, B has no control pressure, the piston type pressure plate 5/12 is reset under the combined action of the common piston return spring 11, the balance oil cavity 25 of the A2 and the balance oil cavity 26 of the B2, the emptying check valve 6/14 is opened under the action of rotary centrifugal force, the oil compressed by the centrifugal force is discharged out of the oil cavities 27 and 28 of the A1 and the B1, and the phenomenon of misoperation of the clutch A, B is avoided. The friction pair of the clutch A, B is in a free state, the power input shaft transmits power to the clutch hub 13, the inner friction plate steel sheet 2 of the clutch A, B matched with the clutch hub is in a free rotation state, and the power is not transmitted to the outer friction plate sintered/paper substrate 1 of the clutch A, B. At this time, the input shaft is in an idle state, and no power is output.
When the clutch A works, the oil port B releases pressure. The control oil from the control valve enters an axial oil duct corresponding to the rotary sealing mechanism through an oil port A, enters six oil ducts A uniformly distributed on the circumference between the cylinder cover 7 and the cylinder sleeve 8 through a sealing lining ring 9, then enters an oil chamber 27A 1, is emptied and closed by the check valve 6 under the action of oil pressure, and the compressed oil continuously pushes the piston type pressure plate 5 to move towards the direction of the stop ring 3 to press the outer friction plate sintering/paper substrate 1 and the inner friction plate steel sheet 2 tightly. At this time, the power is transmitted to the inner friction plate steel sheet 2 of the clutch A matched with the clutch A through the clutch hub 13, the inner friction plate sintered/paper substrate 1 matched with the outer gear ring A22 is transmitted by the plurality of steel sheets 2 through the friction force, the power is transmitted to the central gear on the left side of the clutch A through the outer gear ring A22, and the power is transmitted to the engaged intermediate shaft gear through the central gear.
When the clutch B works, the oil port A releases pressure. The control oil from the control valve enters an axial oil duct corresponding to the rotary sealing mechanism through an oil port B, enters six oil ducts B uniformly distributed on the circumference between the cylinder cover 15 and the cylinder sleeve 16 through the sealing lining ring 17, then enters an oil chamber 28 of B1, is emptied and closed by the check valve 18 under the action of oil pressure, and the compressed oil continuously pushes the piston type pressure plate 12 to move towards the direction of the stop ring 3 to press the outer friction plate sintering/paper substrate 1 and the inner friction plate steel sheet 2 tightly. At this time, the power is transmitted to the inner friction plate steel sheet 2 of the clutch B matched with the clutch through the clutch hub 13, the plurality of steel sheets 2 transmit the power to the outer friction plate sintering/paper substrate 1 matched with the outer gear ring B21 through the friction force, the outer gear ring B21 transmits the power to the central gear on the right side of the clutch B, and the central gear transmits the power to the middle shaft gear meshed with the central gear.
The clutch B engages and simultaneously pushes the pre-compressed piston common return spring 11 in the direction of the clutch a, which in turn pushes the piston pressure plate 5 of the clutch a in the direction away from the snap ring 3. Meanwhile, oil in the balance oil chamber 26 of the B2 of the clutch B is compressed by the piston type pressure plate 12 to flow to the balance oil chamber 25 of the A2 of the clutch A. Clutch a is quickly disengaged under the combined action of piston common return spring 11 and oil pressure in balance oil chamber 25 of a2, and engagement of clutch B and disengagement of clutch a are accomplished at approximately the same time.
The lubricating and cooling oil enters the lubricating and cooling oil path 24 through an axial cooling lubricating hole corresponding to the rotary sealing mechanism, a small part of the lubricating and cooling oil enters an A2 balance oil cavity 25 and a B2 balance oil cavity 26 of the clutch A, B, and the other part of the lubricating and cooling oil enters a friction pair assembly of the clutch A, B through the throttle plug 20 to provide reliable cooling. Due to the throttling effect of the throttle plug 20, a certain low oil level is maintained in the lubricating and cooling oil path 24. Because the A2 balance oil cavity 25 and the B2 balance oil cavity 26 are connected in series with the lubricating and cooling oil channel 24 through the throttling hole 29, low oil pressure jointly acts on the inner sides of the piston type pressure plate 5 and the piston type pressure plate 12 during neutral gear, so that the piston type pressure plate 5 and the piston type pressure plate 12 cannot move towards the direction of the stop ring 3, and misoperation of the clutch A, B is eliminated.
There are two wet hydraulic clutches of synchronous shift in this fourth gear box example. The gear combination can be freely realized according to gear requirements.
The friction pair in the prior art has various types, the friction pair adopted in the embodiment is of a wet multi-plate structure, the outer friction plate sintered/paper substrate 1 is a metal sintered plate, the inner friction plate is a steel plate 2, the specific pressure is high, the friction coefficient is large, the wear coefficient is small, the heat capacity is high, the torque generated by the small volume of the clutch is large due to the characteristics of the friction pair, the combined structure can generate high torque under very small inertia, maintenance is basically not needed, the friction pair is made of metal sintered materials, no asbestos component can not pollute the environment, the ratio of the dynamic friction coefficient and the static friction coefficient of the multi-plate structure is small, and noise can not be generated due to meshing balance. Those skilled in the art can select friction plates of other materials according to the requirements of working conditions.
Compared with the prior art, the synchronous shifting wet hydraulic clutch for the automatic gearbox adopts a feedback design of synchronous action linkage of two clutches, so that the possibility of gear shifting is avoided, and the shifting speed is improved due to the fact that the feedback time of any one clutch is saved. The control execution component and the synchronous feedback component adopt integrated design. The working stability and the transmission efficiency of the clutch are improved through the integrated design, the daily maintenance cost is greatly reduced, the installation space is saved, and the using method is more simple, convenient and flexible. The clutch is in wet operation, and a lubricating and cooling device is integrated, so that the working reliability is improved. A mechanical synchronizer can be replaced by a synchronous shifting wet hydraulic clutch on the basis of the traditional manual transmission in a transmission host factory, and the mechanical synchronizer can be changed into an automatic transmission (parallel shaft type) by matching with a corresponding control system, so that the development cost is directly reduced. The automatic gearbox matched with the synchronous gear shifting wet hydraulic clutch is different from the traditional parallel shaft type AMT gearbox, double-clutch gearbox and parallel shaft AT gearbox. The wet hydraulic clutch of this embodiment synchronous shifting does not have AMT gearbox, the shift fork of shifting of two separation and reunion gearboxes, consequently shifts more reliably, faster, is different from parallel shaft AT gearbox (Honda) again, and its double clutch body does not have synchronous action linkage feedback mechanism, has avoided the possibility of wrong shelves, has saved feedback time, has consequently simplified computerized control system's debugging.
Therefore, the synchronous shifting wet hydraulic clutch for the automatic gearbox adopts a feedback design of synchronous action linkage of two clutches, so that the possibility of gear shifting is avoided, and the shifting speed is improved as the feedback time of any one clutch is saved; the control execution component and the synchronous feedback component adopt an integrated design, the working stability and the transmission efficiency of the clutch are improved through the integrated design, the daily maintenance cost is greatly reduced, the installation space is saved, and the use method is more simple, convenient and flexible; the clutch is in wet operation, and a lubricating and cooling device is integrated, so that the working reliability is improved.
Meanwhile, the friction pair comprises a steel sheet and a sintered/paper substrate, is of a wet multi-sheet structure, has high specific pressure, large friction coefficient, small wear coefficient and high heat capacity, and has the characteristics of small volume and large generated torque of the clutch, the combined structure can generate high torque under very small inertia, basically does not need maintenance, is made of metal sintered materials, does not contain asbestos components and can not pollute the environment, the ratio of the dynamic friction coefficient to the static friction coefficient of the multi-sheet structure is small, and the meshing balance can not generate noise.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A synchronous shifting wet hydraulic clutch for an automatic transmission, comprising:
the power input and output assembly comprises a clutch hub, an outer gear ring A and an outer gear ring B, wherein an inner hole of the clutch hub is used for connecting a central power shaft, a stop ring is sleeved on the excircle of the clutch hub, and the stop ring is limited by a retaining ring; the clutch hub is simultaneously connected with a clutch A and a clutch B, the clutch A and the clutch B are respectively sleeved on the excircle of the clutch hub through a clutch A friction pair and a clutch B friction pair and are respectively positioned on two sides of the stop ring, and the outer gear ring A and the outer gear ring B are respectively connected with the clutch A friction pair and the clutch B friction pair; a lubricating and cooling oil path is processed in the clutch hub, a throttle plug is pressed at the upper end of a throttle hole, axial cooling and lubricating holes which are uniformly distributed on the circumference are processed at the outer rim of the clutch hub, and ball plugs are arranged at two ends of each axial cooling and lubricating hole;
the control execution component comprises a clutch A control oil cylinder, a clutch B control oil cylinder and an emptying one-way valve, wherein the clutch A control oil cylinder and the clutch B control oil cylinder are respectively fixed on the left end surface and the right end surface of the clutch hub through bolts; the clutch A control oil cylinder comprises a compression cylinder cover, a piston type pressing plate and a cylinder sleeve, the compression cylinder cover is sleeved on a short boss of the cylinder sleeve, the piston type pressing plate is sleeved on the compression cylinder cover and the excircle of the cylinder sleeve, and the emptying one-way valves are installed between the compression cylinder cover and the cylinder sleeve and are symmetrically arranged in the circumferential direction; the clutch B control oil cylinder and the clutch A control oil cylinder are identical in structure and are symmetrically arranged;
the synchronous feedback component comprises a piston common return spring, an A2 balance oil cavity and a B2 balance oil cavity, the piston common return spring is installed in a circumferential axial hole at the spoke of the clutch hub, and the piston common return spring is connected between a piston type pressure plate of the clutch A control oil cylinder and a piston type pressure plate of the clutch B control oil cylinder in a compression state; the A2 balance oil chamber is enclosed by the clutch A control oil cylinder and the clutch hub, the B2 balance oil chamber is enclosed by the clutch B control oil cylinder and the clutch hub, and the A2 balance oil chamber and the B2 balance oil chamber are connected in series and share one path of oil liquid control.
2. The wet hydraulic clutch of claim 1, wherein an outer spline is formed on an outer circumference of the clutch hub for connecting the friction pair assembly, a circlip groove is formed in the middle of the outer spline, and the snap ring is sleeved on the outer spline through an inner spline.
3. The wet hydraulic clutch of claim 1, wherein threaded holes are formed in both end faces of the clutch hub, the threaded holes being evenly circumferentially distributed, and the threaded holes are used for mounting the clutch A control cylinder and the clutch B control cylinder.
4. The wet hydraulic clutch for the automatic gearbox with the synchronous gear shifting function as claimed in claim 2, wherein the friction pair assembly comprises a sintered paper substrate and steel sheets, and the sintered paper substrate and the steel sheets are alternately sleeved on the external spline.
5. The wet hydraulic clutch of claim 1, further comprising a packing ring, wherein the packing ring is provided with a plurality of radial circumferential holes, the packing ring is embedded in the inner hole of the pressing cylinder cover, and the packing ring can be in transition fit with the outer circle of the central power shaft to form an annular sealing groove so as to control hydraulic oil to enter the clutch a control cylinder and/or the clutch B control cylinder from the radial holes of the central power shaft through the radial circumferential holes.
6. The wet hydraulic clutch of claim 1, wherein a first O-ring and a retainer ring are respectively fitted in the cylinder sleeve and the outer circular groove of the pressing cylinder cover.
7. The wet clutch of claim 1, wherein a second O-ring is disposed in a rim bore groove of the clutch hub.
8. The wet hydraulic clutch for automatic transmission shifting in synchronization with gear shift according to claim 1, wherein the inner friction plate of clutch a and the inner friction plate of clutch B are both carried by the clutch hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN111313604A (en) * | 2020-03-26 | 2020-06-19 | 济南东测试验机技术有限公司 | Closed servo electric cylinder |
| CN113389822A (en) * | 2020-03-12 | 2021-09-14 | 法雷奥离合器公司 | Double wet clutch |
| CN114458709A (en) * | 2022-01-11 | 2022-05-10 | 杭州前进齿轮箱集团股份有限公司 | Novel zero-output clutch mechanism, working method thereof and gearbox |
| CN114645912A (en) * | 2022-03-28 | 2022-06-21 | 河南科技大学 | A new type of wet clutch structure |
| CN114776720A (en) * | 2022-05-05 | 2022-07-22 | 重庆宗申集研机电科技有限公司 | Double clutch |
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| CN113389822A (en) * | 2020-03-12 | 2021-09-14 | 法雷奥离合器公司 | Double wet clutch |
| CN111313604A (en) * | 2020-03-26 | 2020-06-19 | 济南东测试验机技术有限公司 | Closed servo electric cylinder |
| CN114458709A (en) * | 2022-01-11 | 2022-05-10 | 杭州前进齿轮箱集团股份有限公司 | Novel zero-output clutch mechanism, working method thereof and gearbox |
| CN114645912A (en) * | 2022-03-28 | 2022-06-21 | 河南科技大学 | A new type of wet clutch structure |
| CN114645912B (en) * | 2022-03-28 | 2024-05-14 | 河南科技大学 | Wet clutch structure |
| CN114776720A (en) * | 2022-05-05 | 2022-07-22 | 重庆宗申集研机电科技有限公司 | Double clutch |
| CN114776720B (en) * | 2022-05-05 | 2023-12-26 | 重庆宗申集研机电科技有限公司 | Dual clutch |
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