CN202946658U - Automatic speed changer hydraulic shifting actuator - Google Patents
Automatic speed changer hydraulic shifting actuator Download PDFInfo
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- CN202946658U CN202946658U CN 201220565320 CN201220565320U CN202946658U CN 202946658 U CN202946658 U CN 202946658U CN 201220565320 CN201220565320 CN 201220565320 CN 201220565320 U CN201220565320 U CN 201220565320U CN 202946658 U CN202946658 U CN 202946658U
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Abstract
The utility model relates to an automatic speed changer hydraulic shifting actuator which mainly comprises a shifting finger connected with a speed changer shifting fork, an oil way, a shifting hydraulic cylinder, sensors and a valve control integration module of each control valve, wherein the oil way, the shifting hydraulic cylinder and the sensors are arranged inside the actuator. A hydraulic cylinder piston is a double-piston formed in the mode that a suspension piston ring is sleeved with a piston rod. The hydraulic cylinder is divided into a left shifting pressure sealing cavity and a right shifting pressure sealing cavity through the double-piston. The pressure sealing cavities are connected with electromagnetic valves of the pressure sealing cavities through a control oil opening. The piston rod is fixedly connected with the shifting finger. A signal end is electrically connected with each sensor of the valve control integration module. A command end is electrically connected with each electromagnetic valve and a hydraulic source drive motor. A speed changer control unit is respectively and electrically connected with the command end and the signal end. The automatic speed changer hydraulic shifting actuator is simple in structure, accurate in location, fast in response, reliable in work, and convenient to operate. Moreover, little modification is carried out on a mechanical speed changer, advantages of high transmission efficiency of the mechanical speed changer is reserved, generality is good, and requirements of shifting process of the speed changer can be well met.
Description
Technical field
The utility model relates to a kind of automatic transmission hydraulic actuator of directly shifting gears, and its main application area is the vehicle automatic mechanical speed variator field.
Background technique
Raising along with people's living standard, automobile pollution is more and more higher, speed changer is important composition parts indispensable in the automobile dynamic system assembly, its Main Function is recently to change by changing transmission the power character that motor provides to car load, to guarantee that automobile normally travels under different operating modes.
The domestic automobile industry developed rapidly in recent years, but owing to starting late, also there is technically and abroad a certain distance, autonomous automatic transmission technology is blank basically, automobile on market adopts manual transmission basically, realize shifting by shift handle, and need gas pedal, clutch pedal and shift handle cooperation during gearshift, manual transmission is not only high to the driving operation technical requirements, and driver's operation intensity is large, long-duration driving is easily tired, and this brings certain influence to travel safety.
Control accuracy is high, the realization intellectuality is the trend of China Automobile Industry, the application of electronic control technology aspect automobile plays the important and pivotal role, amateur driver's quantity sharply increases on the one hand in addition, people are also more and more higher to the driving comfortability requirement on the other hand, and automobile electrically-controlled automatic transmission more and more is subject to amateur driver's favor.
The model utility content
The technical problems to be solved in the utility model is: a kind of electrical-control hydraulic automatic transmission hydraulic gear-shifting actuator is provided, for vehicle automatic mechanical speed variator design a kind of work accurately and reliably, the automatic gear shift actuating mechanism of fast response time, long service life.
To achieve these goals, the utility model adopts following technological scheme:
A kind of automatic transmission hydraulic gear-shifting actuator is characterized in that: comprise that mainly the gearshift that is connected with transmission selector fork refers to and the inner valve control integration module that contains oil circuit, gearshift oil hydraulic cylinder, sensor and each control valve; Hydraulic cylinder piston is the double-piston of suspension type active plug ring and piston rod socket, and oil hydraulic cylinder is divided into gearshift wiper seal chamber, two of left and right by double-piston; Each wiper seal chamber is connected with separately two-bit triplet solenoid valve by control port; Piston rod refers to be fixedly connected with gearshift; Each sensor and the electrical connection of control unit sensor-lodging end and valve control integration module; Control unit sends command end and each solenoid valve and the electrical connection of hydraulic power drive motor to actuator; Actuator is sent command end for transmission control unit and control unit and control unit sensor-lodging end is electrically connected respectively.
By technique scheme, the hydraulic power of gear shifting actuating mechanism part mainly is comprised of the hydraulic power drive motor of fuel tank, the gear pump driven pump housing, the pumping oil circuit that is connected with the pump housing, and all low pressure way to cycle oil are connected with fuel tank; Pumping oil circuit end arranges one-way valve, and working connection extends to two two-bit triplet solenoid valve filler openings always after one-way valve, and the two-bit triplet solenoid valve is communicated with the Seal cage of oil hydraulic cylinder one end by oil hydraulic cylinder control port separately; In hydraulic cylinder body upper piston rod central position, skew hydraulic cylinder axis position is equipped with angle displacement sensor; Working connection is provided with relief valve, accumulator and line pressure sensor; Described one-way valve, relief valve, pressure transducer, accumulator, oil hydraulic cylinder, angle displacement sensor, two-bit triplet solenoid valve all are integrated on described valve control integration module.
By technique scheme, high-pressure oil passage, oil circuit control and oil circuit all are integrated on valve control integration module, and become the space multistory alternating expression to arrange.
By technique scheme, the suspension type active plug ring that piston rod splits through two ends, two ends suspension type active plug ring equal in length; Inner and outer wall side at the suspension type active plug ring all is provided with seal ring.
By technique scheme, the two-bit triplet solenoid valve all adopts Normally closed type two-bit triplet plug-in mounting solenoid valve.
By technique scheme, oil hydraulic cylinder is divided into gearshift wiper seal chamber, two of left and right by double-piston, and wiper seal chamber, two of left and right is respectively equipped with control port, and two control port is respectively by the left and right electromagnetic valve and work alone; Piston rod is moving between the position, three of left center rights in cylinder body under wiper seal chamber effect; It is corresponding with position, three of left center rights of oil hydraulic cylinder double-piston that speed changer switches gear.
By technique scheme, on described valve control integration module, the electromagnetic valve hydraulic fluid port is near oil hydraulic cylinder control port.
The utility model actuator is actually the direct gear shifting actuating mechanism of electrical-control hydraulic, and controller, mechanical part and feedback information assembly are arranged, then completes car load self shifter process in conjunction with running operating mode and driver intention co-operation.This actuator is in the situation that original mechanical transmission basic structure is constant, replaces the mechanical transmission shift control mechanism, versatility and compatible good, then control by installing microcomputer additional, finally realize the shift process operation automation.All mechanical parts and sensor element all concentrate on the valve control integration module of one, compact structure, high working efficiency; Control unit is integrated in entire car controller, and each sensor electrical signal transfer corresponding to the signal that detects converts to control unit, according to predetermined control strategy, exports the electrical signal of two-bit triplet solenoid valve 16 after calculating again.The response that solenoid valve 16 is made according to control unit just can realize the switching of gear, saved speed changer gear selecting process, so both simplified the control strategy of automatic transmission, shortened again the time of gear switch, help to improve the power loss that the car load power interruption is brought, the gearshift action effect is not less than manual transmission, fully near driver intention, has saved the sense of fatigue that the driver produces because of shifting.
This actuator is applied on many gear speed-changings device, except realizing above-mentioned functions, can also realize the switching of gear great-leap-forward under the condition that safe driving allows, and the ratio coverage application of automatic transmission will be more flexibly and fast.Mechanism of the present utility model is simple, accurate positioning, response are fast, reliable operation, technology capability are good, easy for installation, change less to mechanical transmission, kept the high advantage of mechanical transmission transmission efficiency, mechanical transmission for different structure, change installation attachment portion just can normally be used a little, versatility is good, can satisfy well the requirement of shift of transmission process.
Description of drawings
Fig. 1 is automatic transmission hydraulic gear-shifting of the present utility model actuator schematic diagram;
Fig. 2 is the automatic transmission hydraulic gear-shifting oil hydraulic cylinder figure of actuator of the present utility model;
1-relief valve; 2-hydraulic power drive motor; 3-fuel tank; 4-oil hydraulic pump; 5-pumping oil circuit; 6-one-way valve; 7-pressure transducer; 8-accumulator; 9-control unit sends command end to actuator: 10-transmission control unit (being integrated in entire car controller); 11-control unit sensor-lodging end; 12-oil hydraulic cylinder oil circuit control; 13-angle displacement sensor; 14-oil hydraulic cylinder; 15-gearshift refers to; 16-two-bit triplet solenoid valve; 17-working connection; 141-floating piston ring, 143-hydraulic cylinder sealing end cap, 144-O RunddichtringO, 145 and 142-hydraulic seal, 146-wear ring, 147-piston rod, 148-control oil duct.
Embodiment
The utility model is described in further detail below in conjunction with embodiment, but do not limit the utility model.
A kind of automatic transmission hydraulic gear-shifting actuator that implements according to the utility model, comprise oil hydraulic cylinder 14, gearshift refer to 15 and the inner valve control integration module that contains oil circuit and be used for installing solenoid valve form: it is characterized in that oil hydraulic cylinder 14 is by the electromagnetic valve piston movement, piston rod 147 refers to that with gearshift 15 are fixedly connected with, gearshift refers to that 15 the other ends are connected with transmission selector fork, thereby piston rod 147 Sports bands are moved gear and are referred to 15 and shift fork motion, realize shift process.
As shown in Figure 1, automatic transmission hydraulic gear-shifting of the present utility model actuator is connected to working connection 17(also referred to as high-pressure oil duct by high-pressure oil pipe); The hydraulic power part mainly is comprised of fuel tank 3, gear pump 4, the hydraulic power drive motor 2 that drives the pump housing, the pumping oil circuit 5 that is connected with the pump housing, and in this mechanism, all low pressure oil returns are finally got back in fuel tank 3; Pumping oil circuit 5 ends arrange one-way valve 6, working connection 17 extends to two two-bit triplet solenoid valve 16 filler openings always after one-way valve 6, two-bit triplet solenoid valve 16 is communicated with the Seal cage of an end of oil hydraulic cylinder 14 by oil hydraulic cylinder oil circuit control 12 separately realizes the position motion; Skew hydraulic cylinder axis position is equipped with angle displacement sensor 13; Working connection 17 is provided with relief valve 1, accumulator 8 and line pressure sensor 7; Described one-way valve 6, relief valve 1, pressure transducer 7, accumulator 8, oil hydraulic cylinder 14, angle displacement sensor 13, two-bit triplet solenoid valve 16 all are integrated on a valve control integration module; Valve control integration module inside is contained oil circuit and is used for installing solenoid valve; Control unit sensor-lodging end 11 and pressure transducer and angle displacement sensor 13 electrical connections; Control unit sends command end 9 and each two-bit triplet solenoid valve 16 and 2 electrical connections of hydraulic power drive motor to actuator; Transmission control unit (being integrated in entire car controller or TCU) 10 with control unit, actuator is sent command end 9 and control unit sensor-lodging end 11 is electrically connected respectively.
Whole oil circulation realizes closed loop control, and the oil of low-pressure reservoir 3 becomes high pressure oil through the gear pump 4 that motor 2 drives, and high pressure oil enters working connection 17 through one-way valve 6, and the effect of one-way valve 6 is to prevent that high pressure oil from refluxing, and improves whole mechanic efficiency.The effect of accumulator 8 is stored energy on the one hand, on the other hand pulsation and compression shock is had good shock-absorbing function, and this impacts to have preferably to automatic transmission shift and improves, and improves the car load travelling comfort; Line pressure sensor 7 changes in order to the pressure that detects in working connection 17, for guaranteeing the reliability of gearshift, the working pressure of working connection 17 is not less than a certain preset lower limit, when the sensor feedback working pressure is not enough, judgement through TCU10 is processed, send the running instruction for motor 2, motor-driven gear pump 4 replenishes the oil pressure of working connection 17; Consider intensity and the required gear shifting force of speed changer of the mechanical parts such as valve control integration module, valve, consider that in addition hydraulic pump works mode and car load are energy-conservation, set the working pressure of working connection not higher than a certain capping value, when the sensor feedback working pressure reaches CLV ceiling limit value, process through the judgement of TCU, send the instruction that quits work for motor 2, can realize the liquid gear pump 4 formula work of having a rest, avoid gear pump 4 to be in for a long time the high speed operation state, improve the system works life-span; The Main Function of relief valve 1 guarantees that exactly whole hydraulic actuator is under safe work state.The left and right solenoid valve is also that two two-bit triplet solenoid valves 16 adopt Normally closed type two-bit triplet plug-in mounting solenoid valves.
As shown in Figure 2, oil hydraulic cylinder 14 by hydraulic cylinder sealing end cap 143, O RunddichtringO 144,, wear ring 146, floating piston ring 141, piston rod 147, control port 148 etc. form; Oil hydraulic cylinder 14 adopts the double-piston design of suspension type active plug rings 141 and piston rod 147 sockets, and oil hydraulic cylinder 14 is divided into two gearshift wiper seal chambeies by double-piston, i.e. left wiper seal chamber and right wiper seal chamber; Wiper seal chamber, two of left and right is respectively equipped with control port, and two control ports are worked alone by the left and right electromagnetic valve respectively; Piston rod 147 refers to that with gearshift 15 are fixedly connected with, and gearshift refers to that 15 the other ends are connected with transmission selector fork; Position, corresponding three of 14 left center rights of oil hydraulic cylinder of shift of transmission process, the special structural design of oil hydraulic cylinder coordinates two two-bit triplet solenoid valves can realize two grades of shift processes.Inner and outer wall side at suspension type active plug ring 141 all is provided with seal ring (hydraulic seal 145 and 142), in order to avoid in the hydraulic jack Seal cage, hydraulic oil refers to that from gearshift 15 reveal.
Two two-bit triplet solenoid valves 16 are controlled respectively oil hydraulic cylinder two ends control port 148 oil inlet and oil returns, two-bit triplet solenoid valve 16 adopts Normally closed type, when being no electric circuit, solenoid valve working connection hydraulic fluid port and control port 148 disconnect, the oil return hydraulic fluid port of control port 148 and solenoid valve is communicated with, and hydraulic cylinder sealing is low-pressure state in the chamber.When two solenoid valves 16 are opened simultaneously, equate owing to all being full of hydraulic oil and pressure in the Seal cage of two of left and right, piston rod 147 is in the oil hydraulic cylinder neutral position, and corresponding speed changer is in neutral gear position; When the outage of left side solenoid valve, during the energising of the right solenoid valve, cylinder seal chamber, the left side is in low-pressure state, and cylinder seal chamber, the right is in high pressure conditions, and because pressure reduction exists, piston rod drives gearshift and refers to that 15 move to left, and completes a left side and advances the gear process; If on the right in the continuous situation of solenoid valve energising, left side solenoid valve is by off-position (speed changer is in into the gear state) when transferring "on" position to, due to left side floating piston ring 141 and piston rod 147 resultant action areas greater than the right piston rod active area, under identical working pressure, piston rod 147 drives gearshift and refers to that 15 move to right to the intermediate equilibria position, namely complete and once move back a grade process, it is also that so automatic transmission just can realize direct gearshift like this that gear is advanced on same the right.
Oil hydraulic cylinder 14 is by the electromagnetic valve piston movement, thus piston rod 147 Sports bands move gear and refer to 15 and the shift fork motion, realize shift process.
For saving installing space, at oil hydraulic cylinder 14 cylinder body upper piston rod 147 center position installing angle displacement sensors 13, straight line motion piston rod in cylinder body, connect by conversion and coil the cycloid motion that converts to around the center, the external output voltage values of angle displacement sensor 13, be respectively position, three of 147 left center rights of corresponding piston rod when the output voltage height is different, with the shift process of judgement speed changer.
The electromagnetic valve hydraulic fluid port is as far as possible near the control port of gearshift oil hydraulic cylinder, to satisfy response fast.
Transmission control unit TCU of the present utility model is the highest control unit of whole hydraulic actuator, in addition TCU also and between entire car controller and driver's instruction of sending realize communication, in order to the gear that automaticallyes switch, thereby realize mechanical transmission self shifter process.
The utility model actuator is actually the direct gear shifting actuating mechanism of electrical-control hydraulic, and controller, mechanical part and feedback information assembly are arranged, then completes car load self shifter process in conjunction with running operating mode and driver intention co-operation.This actuator is in the situation that original mechanical transmission basic structure is constant, replaces the mechanical transmission shift control mechanism, versatility and compatible good, then control by installing microcomputer additional, finally realize the shift process operation automation.All mechanical parts and sensor element all concentrate on the valve control integration module of one, compact structure, high working efficiency; Control unit is integrated in entire car controller, and each sensor electrical signal transfer corresponding to the signal that detects converts to control unit, according to predetermined control strategy, exports the electrical signal of two-bit triplet solenoid valve 16 after calculating again.The response that solenoid valve 16 is made according to control unit just can realize the switching of gear, saved speed changer gear selecting process, so both simplified the control strategy of automatic transmission, shortened again the time of gear switch, help to improve the power loss that the car load power interruption is brought, the gearshift action effect is not less than manual transmission, fully near driver intention, has saved the sense of fatigue that the driver produces because of shifting.
Claims (7)
1. an automatic transmission hydraulic gear-shifting actuator, is characterized in that: comprise that mainly the gearshift that is connected with transmission selector fork refers to and the inner valve control integration module that contains oil circuit, gearshift oil hydraulic cylinder, sensor and each control valve; Hydraulic cylinder piston is the double-piston of suspension type active plug ring and piston rod socket, and oil hydraulic cylinder is divided into gearshift wiper seal chamber, two of left and right by double-piston; Each wiper seal chamber is connected with separately two-bit triplet solenoid valve by control port; Piston rod refers to be fixedly connected with gearshift; Each sensor and the electrical connection of control unit sensor-lodging end and valve control integration module; Control unit sends command end and each solenoid valve and the electrical connection of hydraulic power drive motor to actuator; Actuator is sent command end for transmission control unit and control unit and control unit sensor-lodging end is electrically connected respectively.
2. as described in claim 1 automatic transmission hydraulic gear-shifting actuator, it is characterized in that: the hydraulic power part of gear shifting actuating mechanism mainly is comprised of the hydraulic power drive motor of fuel tank, the gear pump driven pump housing, the pumping oil circuit that is connected with the pump housing, and all low pressure way to cycle oil are connected with fuel tank; Pumping oil circuit end arranges one-way valve, and working connection extends to two two-bit triplet solenoid valve filler openings always after one-way valve, and the two-bit triplet solenoid valve is communicated with the Seal cage of oil hydraulic cylinder one end by oil hydraulic cylinder control port separately; In hydraulic cylinder body upper piston rod central position, skew hydraulic cylinder axis position is equipped with angle displacement sensor; Working connection is provided with relief valve, accumulator and line pressure sensor; Described one-way valve, relief valve, pressure transducer, accumulator, oil hydraulic cylinder, angle displacement sensor, two-bit triplet solenoid valve all are integrated on described valve control integration module.
3. as described in claim 1 or 2 automatic transmission hydraulic gear-shifting actuator, it is characterized in that: high-pressure oil passage, oil circuit control and oil circuit are integrated on valve control integration module, and become the space multistory alternating expression to arrange.
4. as described in claim 3 automatic transmission hydraulic gear-shifting actuator is characterized in that: the suspension type active plug ring that piston rod splits through two ends, two ends suspension type active plug ring equal in length; Inner and outer wall side at the suspension type active plug ring all is provided with seal ring.
5. as claim 1 or 2 or 4 described automatic transmission hydraulic gear-shifting actuators, it is characterized in that: the two-bit triplet solenoid valve all adopts Normally closed type two-bit triplet plug-in mounting solenoid valve.
6. automatic transmission hydraulic gear-shifting as claimed in claim 5 actuator, it is characterized in that: oil hydraulic cylinder is divided into gearshift wiper seal chamber, two of left and right by double-piston, wiper seal chamber, two of left and right is respectively equipped with control port, and two control port is respectively by the left and right electromagnetic valve and work alone; Piston rod is moving between the position, three of left center rights in cylinder body under wiper seal chamber effect; It is corresponding with position, three of left center rights of oil hydraulic cylinder double-piston that speed changer switches gear.
7. as claim 1 or 2 or 4 or 6 described automatic transmission hydraulic gear-shifting actuators, it is characterized in that: on described valve control integration module, the electromagnetic valve hydraulic fluid port is near oil hydraulic cylinder control port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220565320 CN202946658U (en) | 2012-10-31 | 2012-10-31 | Automatic speed changer hydraulic shifting actuator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220565320 CN202946658U (en) | 2012-10-31 | 2012-10-31 | Automatic speed changer hydraulic shifting actuator |
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| CN202946658U true CN202946658U (en) | 2013-05-22 |
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| CN 201220565320 Expired - Lifetime CN202946658U (en) | 2012-10-31 | 2012-10-31 | Automatic speed changer hydraulic shifting actuator |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496645A (en) * | 2013-09-06 | 2014-01-08 | 资阳南车传动有限公司 | Speed changer for coal mine drilling rig hydraulic winch |
| CN104712751A (en) * | 2015-03-26 | 2015-06-17 | 第一拖拉机股份有限公司 | Tractor electric hydraulic control gear shift mechanism |
| CN106032840A (en) * | 2015-03-17 | 2016-10-19 | 上海瑞迪汽车科技有限公司 | Hydraulic control gear shifting system of two-speed automatic gearbox |
| CN106151495A (en) * | 2016-08-14 | 2016-11-23 | 邹霞 | AMT system oil path gas path device |
| CN104633097B (en) * | 2013-11-08 | 2017-04-12 | 本田技研工业株式会社 | Shift actuator |
| CN106715974A (en) * | 2014-07-31 | 2017-05-24 | Fte汽车股份有限公司 | Hydraulic or pneumatic operating device for operating actuators in a motor vehicle transmission |
| CN107387593A (en) * | 2017-09-02 | 2017-11-24 | 吉林大学 | Motor-direct-drive type clutch electric-controlled hydraulic executing agency and its control method |
| CN107448600A (en) * | 2017-09-12 | 2017-12-08 | 都匀东方机床有限公司 | Digital controlled planer machine gearbox hydraulic gear shifting structure |
| CN108980128A (en) * | 2017-06-05 | 2018-12-11 | 上海汽车集团股份有限公司 | Solenoid valve, fork controls system and automobile |
| CN109578578A (en) * | 2017-09-29 | 2019-04-05 | 比亚迪股份有限公司 | Oil piping system without clutch gearbox and without clutch gearbox |
| CN111425593A (en) * | 2020-03-25 | 2020-07-17 | 陕西法士特汽车传动集团有限责任公司 | Automatic gear shifting system and gear shifting method of agricultural machinery transmission |
| CN114483818A (en) * | 2021-12-09 | 2022-05-13 | 中国船舶重工集团公司第七0三研究所 | Hydraulic control shifting fork capable of pushing high-speed rotating part |
-
2012
- 2012-10-31 CN CN 201220565320 patent/CN202946658U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496645A (en) * | 2013-09-06 | 2014-01-08 | 资阳南车传动有限公司 | Speed changer for coal mine drilling rig hydraulic winch |
| CN104633097B (en) * | 2013-11-08 | 2017-04-12 | 本田技研工业株式会社 | Shift actuator |
| CN106715974B (en) * | 2014-07-31 | 2019-03-08 | Fte汽车股份有限公司 | For activating the hydraulic or pneumatic actuator of multiple setting elements in motor vehicle transmission |
| CN106715974A (en) * | 2014-07-31 | 2017-05-24 | Fte汽车股份有限公司 | Hydraulic or pneumatic operating device for operating actuators in a motor vehicle transmission |
| US10337605B2 (en) | 2014-07-31 | 2019-07-02 | FTE automotove GmbH | Hydraulic or pneumatic actuating device for actuation of setting elements in a motor vehicle transmission |
| CN106032840A (en) * | 2015-03-17 | 2016-10-19 | 上海瑞迪汽车科技有限公司 | Hydraulic control gear shifting system of two-speed automatic gearbox |
| CN104712751A (en) * | 2015-03-26 | 2015-06-17 | 第一拖拉机股份有限公司 | Tractor electric hydraulic control gear shift mechanism |
| CN106151495A (en) * | 2016-08-14 | 2016-11-23 | 邹霞 | AMT system oil path gas path device |
| CN108980128A (en) * | 2017-06-05 | 2018-12-11 | 上海汽车集团股份有限公司 | Solenoid valve, fork controls system and automobile |
| CN107387593A (en) * | 2017-09-02 | 2017-11-24 | 吉林大学 | Motor-direct-drive type clutch electric-controlled hydraulic executing agency and its control method |
| CN107448600A (en) * | 2017-09-12 | 2017-12-08 | 都匀东方机床有限公司 | Digital controlled planer machine gearbox hydraulic gear shifting structure |
| CN109578578A (en) * | 2017-09-29 | 2019-04-05 | 比亚迪股份有限公司 | Oil piping system without clutch gearbox and without clutch gearbox |
| CN111425593A (en) * | 2020-03-25 | 2020-07-17 | 陕西法士特汽车传动集团有限责任公司 | Automatic gear shifting system and gear shifting method of agricultural machinery transmission |
| CN114483818A (en) * | 2021-12-09 | 2022-05-13 | 中国船舶重工集团公司第七0三研究所 | Hydraulic control shifting fork capable of pushing high-speed rotating part |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130522 |
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| CX01 | Expiry of patent term |