CN113775744A - Hydraulic automatic gear shifting and selecting system - Google Patents
Hydraulic automatic gear shifting and selecting system Download PDFInfo
- Publication number
- CN113775744A CN113775744A CN202111250763.8A CN202111250763A CN113775744A CN 113775744 A CN113775744 A CN 113775744A CN 202111250763 A CN202111250763 A CN 202111250763A CN 113775744 A CN113775744 A CN 113775744A
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- Prior art keywords
- gear
- shifting
- gear shifting
- selecting
- piston
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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
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/02—Selector apparatus
- F16H59/0278—Constructional features of the selector lever, e.g. grip parts, mounting or manufacturing
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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
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/02—Selector apparatus
- F16H59/04—Ratio selector apparatus
- F16H59/045—Ratio selector apparatus consisting of fluid valves
Abstract
The invention discloses a hydraulic automatic gear shifting and selecting system which comprises a supporting shell, a gear selecting mechanism and a gear shifting mechanism. The gear selecting mechanism comprises a gear selecting shaft, a gear selecting piston and a first spring, the gear selecting shaft is arranged on the central line of the supporting shell, and the gear selecting piston is sleeved on the outer side wall of the gear selecting shaft and can slide along the gear selecting shaft; one end of the supporting shell is provided with a gear selecting oil inlet. One end of the supporting shell, which is far away from the gear selecting oil inlet, is also provided with a first supporting seat. The gear selecting piston is contacted with the vertical edge of the first supporting seat close to the gear selecting shaft, and the first spring is arranged between the side wall of the supporting shell and the other vertical edge of the first supporting seat; the side of the gear selecting shaft piston is also provided with a gear selecting shifting head, and the side wall of the supporting shell is provided with a gear selecting hole corresponding to the gear selecting shifting head. The hydraulic control replaces electric drive, so that the reduction of gear selecting and shifting force caused by overheating in long-term work is avoided, and the gear selecting and shifting function fault is avoided; meanwhile, the number of the electromagnetic valves is effectively reduced, so that the cost is reduced.
Description
Technical Field
The invention relates to the technical field of transmission gear shifting, in particular to a hydraulic automatic gear shifting system.
Background
The automatic gear is a trend of automobile development, a plurality of trucks are also matched with AMT automatic gear gearboxes at present, and a gear selecting and shifting mechanism is an important mechanism in an AMT complete machine, so that the requirement is high. In an AMT gear selecting and shifting mechanism, two schemes of electric control and hydraulic control are adopted at present.
In the prior art, the electric gear selecting and shifting structure is driven by a motor or an electric cylinder, and when the motor is driven, a reducer is generally required to amplify the output torque of the motor so as to meet the requirement of gear selecting and shifting force. When the electric cylinder is adopted for driving, the electric cylinder is generally externally hung on the whole gearbox, and in order to meet the requirements of bidirectional movement of gear selection and gear shifting, the gear selection and gear shifting mechanisms generally respectively comprise 2 electric cylinders, and 4 electric cylinders are required in total.
The hydraulic drive selects the gear shifting structure, and is more similar with electric cylinder driven mechanism, also generally needs 4 solenoid valves to realize the selection of complete machine and shifts the function. The hydraulic pressure adopts the electric scheme that the electric scheme generally adopts an electric cylinder for control, and the electric cylinder comprises a gear selecting electric cylinder and two gear shifting electric cylinders. The gear selecting and shifting force of the electric cylinder has certain limitation, the cost is high, the problem of heat dissipation exists in the durability verification in the development process, and the development difficulty is high. The existing hydraulic drive gear selecting and shifting mechanism has certain limitation because the electromagnetic valves are used more (at least 4), and the overall arrangement and the cost are greatly limited.
Therefore, how to provide a hydraulic automatic gear shifting device which can effectively solve the problems of insufficient gear shifting force of the electric gear selecting and shifting mechanism, reduce the number of used electromagnetic valves, reduce the cost and save the assembly space becomes a technical problem which needs to be solved in the field.
Disclosure of Invention
The invention aims to provide a hydraulic automatic gear shifting system which can effectively solve the problem that the gear shifting force of an electric gear shifting mechanism is insufficient, reduce the using number of electromagnetic valves, reduce the cost and save the assembly space.
According to one aspect of the invention, a hydraulic automatic gear shifting system is provided, comprising a support housing, a gear selecting mechanism and a gear shifting mechanism;
the gear selecting mechanism comprises a gear selecting shaft, a gear selecting piston and a first spring, the gear selecting shaft is arranged on the central line of the supporting shell, and the gear selecting piston is sleeved on the outer side wall of the gear selecting shaft and can slide along the gear selecting shaft; a gear selection oil inlet is formed in one end of the supporting shell, so that the gear selection piston slides towards a direction far away from the gear selection oil inlet under the action of oil pressure; one end of the support shell, which is far away from the gear selection oil inlet, is also provided with a first support seat with a Z-shaped section, one transverse edge of the first support seat is parallel to the gear selection shaft, and two vertical edges of the first support seat are perpendicular to the gear selection shaft; the gear selecting piston is contacted with the vertical edge of the first supporting seat close to the gear selecting shaft, and the first spring is arranged between the side wall of the supporting shell and the other vertical edge of the first supporting seat;
a gear selecting shifting block is further arranged on the side edge of the gear selecting shaft piston, a gear selecting hole corresponding to the gear selecting shifting block is formed in the side wall of the supporting shell, and the gear selecting shifting block penetrates through the gear selecting hole to be matched with a gear selecting shifting fork on the vehicle body;
the gear shifting mechanism comprises a gear shifting piston, a gear shifting cavity is formed in the back face, opposite to the gear selecting hole, of the side wall of the supporting shell, a gear shifting head symmetrical to the gear selecting shifting head is arranged on the gear selecting piston, and the gear shifting head extends into the gear shifting cavity; the top of the gear shifting cavity is provided with two symmetrical gear shifting seats; a sliding gear shifting piston is arranged in one of the gear shifting seats, the end part of the gear shifting piston penetrates through the gear shifting seat and corresponds to the end part of the gear shifting head, and a gear shifting oil inlet is formed in the side wall, far away from the gear shifting head, of the gear shifting seat, so that the gear shifting piston is pushed to rotate around the gear selecting shaft under the action of oil pressure and is matched with gears on a gear selecting shifting fork on a vehicle body; and a return unit is arranged in the other gear shifting seat and used for applying an acting force opposite to the gear shifting head and the gear shifting piston so that the gear shifting piston can work under the action of no oil pressure, and the gear selecting head is matched with another gear on a gear selecting shifting fork on the vehicle body.
Optionally, according to the hydraulic automatic gear shifting system of the present invention, a first groove is disposed on an inner sidewall of the support housing; and a first sealing ring is arranged in the first groove, the first sealing ring is positioned between the gear shifting cavity and the gear selecting oil inlet, and the first sealing ring is always attached to the outer side wall of the gear shifting piston.
Optionally, according to the hydraulic automatic gear shifting system of the present invention, a second groove is formed on an inner side wall of the gear shifting piston, a second seal ring is disposed in the second groove, and the second seal ring is always attached to an outer side wall of the gear selecting shaft.
Optionally, according to the hydraulic automatic gear shifting system of the present invention, the first spring is located outside the first support seat.
Optionally, according to the hydraulic automatic gear shifting system of the present invention, a second spring is disposed between the gear selecting piston and a vertical edge of the first supporting seat proximate to the gear selecting shaft.
Optionally, according to the hydraulic automatic gear shifting system of the present invention, a second support seat having a Z-shaped cross section is further sleeved outside the gear selecting shaft, the second support seat is located between the second spring and the gear selecting piston, the second spring is located between a vertical edge of the first support seat close to the gear selecting shaft and a vertical edge of the second support seat close to the gear selecting shaft, and when the gear selecting piston slides under the action of oil pressure, a vertical edge of the second support seat far from the gear selecting shaft is matched with a vertical edge of the first support seat far from the gear selecting shaft.
Optionally, according to the hydraulic automatic gear shifting system of the present invention, a third spring is further disposed between the vertical edge of the second support seat close to the gear selecting shaft and the gear selecting piston, and an elastic force of the first spring is greater than an elastic force of the second spring, and an elastic force of the second spring is greater than an elastic force of the second spring.
Optionally, according to the hydraulic automatic gear shifting system of the present invention, an outer diameter of the lateral side of the second support seat is smaller than or equal to an inner diameter of the lateral side of the first support seat.
Optionally, according to the hydraulic automatic gear shifting system of the present invention, the return unit is a gear shifting piston, the two gear shifting pistons are symmetrically disposed on two sides of the gear shifting head, and symmetric gear shifting oil inlets are disposed in the two gear shifting seats.
Optionally, according to the hydraulic automatic gear shifting system of the present invention, the return spring is a return spring, the return spring is disposed between the gear shifting seat and the gear shifting dial, and when the gear shifting piston is under no oil pressure, the return spring pushes the gear shifting dial to rotate around the gear selecting shaft and is embedded into a gear on a gear shifting fork of a vehicle body.
The hydraulic automatic gear shifting and selecting system disclosed by the invention replaces electric drive through hydraulic control, and avoids the reduction of gear shifting and selecting force caused by overheating in long-term work, thereby causing the failure of gear shifting and selecting function; meanwhile, the number of the electromagnetic valves is effectively reduced, so that the cost is reduced, the whole mechanism is more compact, and the arrangement space is saved. The force of the gear selecting shifting block reaching different shifting fork positions is more obviously different through the first spring to the third spring, and the position difference of the gear selecting shifting block caused by the oil pressure fluctuation entering from a gear selecting oil inlet is avoided; in addition, the gear shifting piston and the return unit can realize the rotation of the gear shifting head, so that the gear selecting shifting head enters a specific gear in the same shifting fork.
Other features of the invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a front cross-sectional view of a hydraulic automatic shift system as disclosed herein;
FIG. 2 is a side cross-sectional view of the disclosed hydraulic automatic shift system.
Description of reference numerals: 1-a support housing; 2-a gear selecting piston; 3-a first sealing ring; 4-a second sealing ring; 5-selecting a gear shaft; 6-a first spring; 7-a first support; 8-a second spring; 9-a third spring; 10-a second support seat; 11-selecting a gear shifting block; 12-a gear selecting shifting fork; 13-a shifting piston; 14-a gear selecting oil inlet; 15-gear shifting seat; 16-a shift oil inlet; 17-a third sealing ring; 18-shift shifting block.
Detailed Description
Various exemplary embodiments of the invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1 and 2, the present invention provides a hydraulic automatic gear shifting system including a support housing 1, a gear selecting mechanism, and a gear shifting mechanism.
The gear selecting mechanism comprises a gear selecting shaft 5, a gear selecting piston 2 and a first spring 6, the gear selecting shaft 5 is arranged on the central line of the supporting shell 1, and the gear selecting piston 2 is sleeved on the outer side wall of the gear selecting shaft 5 and can slide along the gear selecting shaft 5; a gear selection oil inlet 14 is formed in one end of the support shell 1, so that the gear selection piston 2 slides towards a direction far away from the gear selection oil inlet 14 under the action of oil pressure; a first supporting seat 7 with a Z-shaped section is further arranged at one end, away from the gear selection oil inlet 14, of the supporting shell 1, one transverse edge of the first supporting seat 7 is parallel to the gear selection shaft 5, and two vertical edges of the first supporting seat 7 are perpendicular to the gear selection shaft 5; the gear selecting piston 2 contacts with a vertical edge of the first supporting seat 7 close to the gear selecting shaft 5, and the first spring 6 is arranged between the side wall of the supporting shell 1 and the other vertical edge of the first supporting seat 7.
A gear selecting shifting block 11 is further arranged on the side edge of the piston of the gear selecting shaft 5, a gear selecting hole corresponding to the gear selecting shifting block 11 is formed in the side wall of the supporting shell 1, and the gear selecting shifting block 11 penetrates through the gear selecting hole to be matched with a gear selecting shifting fork 12 on the vehicle body.
The gear shifting mechanism comprises a gear shifting piston 13, a gear shifting cavity is arranged on the back surface of the side wall of the supporting shell 1 opposite to the gear selecting hole, a gear shifting head 18 symmetrical to the gear selecting head 11 is arranged on the gear selecting piston 2, and the gear shifting head 18 extends into the gear shifting cavity; the top of the gear shifting cavity is provided with two symmetrical gear shifting seats 15; a sliding shifting piston 13 is arranged in one of the shifting seats 15, the end part of the shifting piston 13 penetrates through the shifting seat 15 and corresponds to the end part of the shifting head 18, and a shifting oil inlet 16 is formed in the side wall of the shifting seat 15, which is far away from the shifting head 18, so that the shifting piston 13 pushes the shifting piston 13 to rotate around the gear selecting shaft 5 under the action of oil pressure and is matched with a gear on a gear selecting shifting fork 12 on the vehicle body; a return unit is arranged in the other gear shifting seat 15 and is used for applying an acting force to the gear shifting head 18 opposite to the gear shifting piston 13 so that the gear selecting head 11 is matched with the other gear on the gear selecting shifting fork 12 on the vehicle body under the action of no oil pressure of the gear shifting piston 13.
In implementation, hydraulic control is used for replacing electric drive, so that the reduction of gear selecting and shifting force caused by overheating in long-term work is avoided, and the failure of the gear selecting and shifting function is avoided; meanwhile, the number of the electromagnetic valves is effectively reduced, so that the cost is reduced, the whole mechanism is more compact, and the arrangement space is saved. The forces of the gear selecting shifting block 11 reaching different shifting fork positions are more obviously different through the first spring 6 to the third spring 9, so that the position difference of the gear selecting shifting block 11 caused by the oil pressure fluctuation entering from a gear selecting oil inlet 14 is avoided; in addition, the rotation of the shift finger 18 can be realized by the shift piston 13 and the return unit, so that the gear selection finger 11 enters a specific gear in the same fork.
Furthermore, a first groove is arranged on the inner side wall of the supporting shell 1; be equipped with first sealing washer 3 in the first recess, first sealing washer 3 is located and shifts between chamber and the select shelves oil inlet 14, and first sealing washer 3 is laminated with the lateral wall of the piston 13 of shifting all the time. The first sealing ring 3 can improve the sealing performance between the support shell 1 and the shifting piston 13, and prevent oil from flowing into a shifting cavity or other parts along a gap between the shifting piston 13 and the support shell 1, so that the system is damaged.
Further, a second groove is formed in the inner side wall of the gear shifting piston 13, a second sealing ring 4 is arranged in the second groove, and the second sealing ring 4 is always attached to the outer side wall of the gear selecting shaft 5. The same principle as the first sealing ring 3, the second sealing ring 4 can improve the sealing performance between the gear shifting piston 13 and the gear selecting shaft 5, and further isolate oil in the gear selecting oil inlet 14.
Further, the first spring 6 is located outside the first support seat 7, so that the first spring 6 can wrap the first support seat 7, thereby defining the position of the first support seat 7.
Furthermore, a second spring 8 is arranged between the gear selecting piston 2 and the vertical edge of the first supporting seat 7 close to the gear selecting shaft 5.
Still further, the outside of selecting a grade axle 5 still overlaps and is equipped with the second supporting seat 10 that the cross-section is the Z shape, and second supporting seat 10 is located between second spring 8 and selecting a grade piston 2, and second spring 8 is located between the vertical limit that first supporting seat 7 is pressed close to selecting a grade axle 5 and the vertical limit that second supporting seat 10 is pressed close to selecting a grade axle 5, when selecting a grade piston 2 and sliding under the oil pressure effect, the vertical limit that second supporting seat 10 is far away from selecting a grade axle 5 cooperatees with the vertical limit that first supporting seat 7 is far away from selecting a grade axle 5.
Still further, a third spring 9 is further disposed between the vertical edge of the second supporting seat 10 close to the gear selecting shaft 5 and the gear selecting piston 2, and the elastic force of the first spring 6 is greater than the elastic force of the second spring 8, and the elastic force of the second spring 8 is greater than the elastic force of the second spring 8. During implementation, the spring with the gradually reduced elastic coefficient enables the force of the gear selecting shifting block 11 reaching different shifting fork positions to have more obvious difference, and the position difference of the gear selecting shifting block 11 caused by oil pressure fluctuation entering from a gear selecting oil inlet 14 is avoided. When gear selection is needed, for example, the gear is shifted from 1 gear to 2 gears, at this time, the gear selection electromagnetic valve controls oil to enter the cavity of the gear selection piston 2 from the gear selection oil inlet 14 of the support shell 1, and under the action of oil pressure, the resistance of the third spring 9 is overcome, and the gear selection piston 2 is pushed to move. At the moment, the gear selecting spring is compressed, and when the hydraulic pressure is the same as the resistance of the spring, the gear selecting shifting block 11 is just positioned at the position of the gear selecting shifting fork 12 of the second gear, so that the 2-gear shifting operation can be carried out. When the gear selection operation is to be continued, for example, the gear is shifted from 3 to 4, the opening of the gear selection electromagnetic valve is increased, the oil pressure entering from the gear selection oil inlet 14 is increased, and the gear selection piston 2 continues to overcome the resistance of the second spring 8 to move forward to reach a required position.
Further, the outer diameter of the lateral side of the second support seat 10 is smaller than or equal to the inner diameter of the lateral side of the first support seat 7. Make second supporting seat 10 be located first supporting seat 7 to when making select shelves piston 2 to move left again, to compressing third spring 9, if need get into higher gear, then extrude second spring 8 through second supporting seat 10, if need get into higher gear, then extrude first spring 6 through first supporting seat 7.
Further, the return unit is a gear shifting piston 13, the two gear shifting pistons 13 are symmetrically arranged on two sides of the gear shifting head 18, and symmetrical gear shifting oil inlets 16 are arranged in the two gear shifting seats 15. In practice, a third sealing ring 17 is arranged between the outer side wall of the shifting piston 13 and the inner side wall of the shifting seat 15, so that oil is prevented from entering the shifting cavity.
Further, the return spring is a return spring, the return spring is arranged between the gear shifting seat 15 and the gear shifting head 18, and when the gear shifting piston 13 does not have the oil pressure, the return spring pushes the gear shifting head 18 to rotate around the gear selecting shaft 5 and is embedded into a gear on a gear shifting fork of the vehicle body.
Further, the gear selecting shifting block 11 and the gear shifting block 18 form a lever structure, so that the gear shifting force can be amplified under the action of certain oil pressure, the gear shifting function is realized, or hydraulic pressure is increased, and the arrangement space is reduced.
Although some specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are intended to be illustrative only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A hydraulic automatic gear shifting and selecting system is characterized by comprising a supporting shell, a gear selecting mechanism and a gear shifting mechanism;
the gear selecting mechanism comprises a gear selecting shaft, a gear selecting piston and a first spring, the gear selecting shaft is arranged on the central line of the supporting shell, and the gear selecting piston is sleeved on the outer side wall of the gear selecting shaft and can slide along the gear selecting shaft; a gear selection oil inlet is formed in one end of the supporting shell, so that the gear selection piston slides towards a direction far away from the gear selection oil inlet under the action of oil pressure; one end of the support shell, which is far away from the gear selection oil inlet, is also provided with a first support seat with a Z-shaped section, one transverse edge of the first support seat is parallel to the gear selection shaft, and two vertical edges of the first support seat are perpendicular to the gear selection shaft; the gear selecting piston is contacted with the vertical edge of the first supporting seat close to the gear selecting shaft, and the first spring is arranged between the side wall of the supporting shell and the other vertical edge of the first supporting seat;
a gear selecting shifting block is further arranged on the side edge of the gear selecting shaft piston, a gear selecting hole corresponding to the gear selecting shifting block is formed in the side wall of the supporting shell, and the gear selecting shifting block penetrates through the gear selecting hole to be matched with a gear selecting shifting fork on the vehicle body;
the gear shifting mechanism comprises a gear shifting piston, a gear shifting cavity is formed in the back face, opposite to the gear selecting hole, of the side wall of the supporting shell, a gear shifting head symmetrical to the gear selecting shifting head is arranged on the gear selecting piston, and the gear shifting head extends into the gear shifting cavity; the top of the gear shifting cavity is provided with two symmetrical gear shifting seats; a sliding gear shifting piston is arranged in one of the gear shifting seats, the end part of the gear shifting piston penetrates through the gear shifting seat and corresponds to the end part of the gear shifting head, and a gear shifting oil inlet is formed in the side wall, far away from the gear shifting head, of the gear shifting seat, so that the gear shifting piston is pushed to rotate around the gear selecting shaft under the action of oil pressure and is matched with gears on a gear selecting shifting fork on a vehicle body; and a return unit is arranged in the other gear shifting seat and used for applying an acting force opposite to the gear shifting head and the gear shifting piston so that the gear shifting piston can work under the action of no oil pressure, and the gear selecting head is matched with another gear on a gear selecting shifting fork on the vehicle body.
2. The hydraulic automatic gear shifting system of claim 1, wherein a first groove is provided on an inner sidewall of the support housing; and a first sealing ring is arranged in the first groove, the first sealing ring is positioned between the gear shifting cavity and the gear selecting oil inlet, and the first sealing ring is always attached to the outer side wall of the gear shifting piston.
3. The hydraulic automatic gear shifting system according to claim 1, wherein a second groove is formed in an inner side wall of the gear shifting piston, a second sealing ring is arranged in the second groove, and the second sealing ring is always attached to an outer side wall of the gear selecting shaft.
4. The hydraulic automatic gear shifting system of claim 1, wherein the first spring is located outside the first support seat.
5. The hydraulic automatic gear shifting system according to claim 1, wherein a second spring is provided between the gear shifting piston and a vertical edge of the first support seat proximate to the gear shifting shaft.
6. The hydraulic automatic shifting system according to claim 5, wherein a second support seat having a Z-shaped cross section is further sleeved outside the shift selection shaft, the second support seat is located between the second spring and the shift selection piston, the second spring is located between a vertical edge of the first support seat proximate to the shift selection shaft and a vertical edge of the second support seat proximate to the shift selection shaft, and when the shift selection piston slides under the action of oil pressure, the vertical edge of the second support seat away from the shift selection shaft is matched with the vertical edge of the first support seat away from the shift selection shaft.
7. The hydraulic automatic shifting system according to claim 6, wherein a third spring is further disposed between the vertical edge of the second support seat proximate to the shift select shaft and the shift select piston, and an elastic force of the first spring is greater than an elastic force of the second spring, and an elastic force of the second spring is greater than an elastic force of the second spring.
8. The hydraulic automatic gear shifting system of claim 6, wherein an outer diameter of the lateral edge of the second support seat is less than or equal to an inner diameter of the lateral edge of the first support seat.
9. The hydraulic automatic gear shifting system according to claim 1, wherein the return unit is a gear shifting piston, two gear shifting pistons are symmetrically arranged on two sides of the gear shifting head, and two gear shifting seats are internally provided with symmetrical gear shifting oil inlets.
10. The hydraulic automatic gear shifting system according to claim 1, wherein the return spring is a return spring disposed between the gear shifting seat and the gear shifting dial, and when the gear shifting piston is under no oil pressure, the return spring pushes the gear shifting dial to rotate around the gear selecting shaft and to be embedded into a gear on a gear shifting fork of a vehicle body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111250763.8A CN113775744A (en) | 2021-10-26 | 2021-10-26 | Hydraulic automatic gear shifting and selecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111250763.8A CN113775744A (en) | 2021-10-26 | 2021-10-26 | Hydraulic automatic gear shifting and selecting system |
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| CN113775744A true CN113775744A (en) | 2021-12-10 |
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| CN202111250763.8A Pending CN113775744A (en) | 2021-10-26 | 2021-10-26 | Hydraulic automatic gear shifting and selecting system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63308258A (en) * | 1987-06-05 | 1988-12-15 | Toyota Motor Corp | Control device for staged transmission for vehicle |
| CN101245850A (en) * | 2008-03-20 | 2008-08-20 | 重庆大学 | Mechanical automatic speed-changing direct-shifting hydraulic actuator of heavy vehicle |
| CN102808936A (en) * | 2012-08-31 | 2012-12-05 | 东风汽车公司 | Gear-selecting and shifting actuating mechanism for automatic mechanical transmission case |
| CN204164326U (en) * | 2014-09-26 | 2015-02-18 | 中国第一汽车股份有限公司 | A kind of automatic mechanical transmission hydraulic pressure shift-selecting and changing actuating mechanism |
| CN107366742A (en) * | 2017-08-22 | 2017-11-21 | 湖北汽车工业学院 | A kind of automatic speed changer for machine Pneumatic shift control device and shift control method |
| CN212389740U (en) * | 2020-05-29 | 2021-01-22 | 株洲齿轮有限责任公司 | Electromagnetic type gear selecting and shifting actuating mechanism |
-
2021
- 2021-10-26 CN CN202111250763.8A patent/CN113775744A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63308258A (en) * | 1987-06-05 | 1988-12-15 | Toyota Motor Corp | Control device for staged transmission for vehicle |
| CN101245850A (en) * | 2008-03-20 | 2008-08-20 | 重庆大学 | Mechanical automatic speed-changing direct-shifting hydraulic actuator of heavy vehicle |
| CN102808936A (en) * | 2012-08-31 | 2012-12-05 | 东风汽车公司 | Gear-selecting and shifting actuating mechanism for automatic mechanical transmission case |
| CN204164326U (en) * | 2014-09-26 | 2015-02-18 | 中国第一汽车股份有限公司 | A kind of automatic mechanical transmission hydraulic pressure shift-selecting and changing actuating mechanism |
| CN107366742A (en) * | 2017-08-22 | 2017-11-21 | 湖北汽车工业学院 | A kind of automatic speed changer for machine Pneumatic shift control device and shift control method |
| CN212389740U (en) * | 2020-05-29 | 2021-01-22 | 株洲齿轮有限责任公司 | Electromagnetic type gear selecting and shifting actuating mechanism |
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Application publication date: 20211210 |
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