CN112145678A - Direct-drive rear power takeoff integrated with control mechanism - Google Patents
Direct-drive rear power takeoff integrated with control mechanism Download PDFInfo
- Publication number
- CN112145678A CN112145678A CN202010987329.7A CN202010987329A CN112145678A CN 112145678 A CN112145678 A CN 112145678A CN 202010987329 A CN202010987329 A CN 202010987329A CN 112145678 A CN112145678 A CN 112145678A
- Authority
- CN
- China
- Prior art keywords
- power takeoff
- shaft
- shell
- groove
- integrated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/3023—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by fluid pressure
-
- 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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
-
- 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H2063/3076—Selector shaft assembly, e.g. supporting, assembly or manufacturing of selector or shift shafts; Special details thereof
-
- 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H2063/3093—Final output elements, i.e. the final elements to establish gear ratio, e.g. dog clutches or other means establishing coupling to shaft
-
- 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H2063/3093—Final output elements, i.e. the final elements to establish gear ratio, e.g. dog clutches or other means establishing coupling to shaft
- F16H2063/3096—Sliding keys as final output elements; Details thereof
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
Abstract
The invention provides a direct-drive rear power takeoff integrated with an operating mechanism, which solves the problems that the reliability of the power takeoff is reduced and the axial size of the power takeoff is larger due to the risk of looseness of a shifting fork and a shifting fork shaft in the conventional power takeoff. The power takeoff comprises a power takeoff shell, an output shaft, a through shaft, a sliding sleeve and an operating device; the output shaft is arranged on the power takeoff shell, one end of the output shaft is positioned outside the power takeoff shell, and the other end of the output shaft is coaxial with the through shaft; the sliding sleeve is sleeved on the output shaft in a spline connection mode, and a second groove is formed in the outer circular surface of the sliding sleeve; the operating device comprises a cylinder shell, a gear engaging shaft, a return spring and a piston which are sequentially arranged in the cylinder shell from inside to outside, the power takeoff shell is vertically communicated with the cylinder shell, a notch is formed in the side wall of the piston, and a groove is formed in the bottom of the notch; the outer circular surface of the gear engaging shaft is provided with a convex block, and the end part of the gear engaging shaft is provided with a fork foot block; the hanging and blocking shaft penetrates through the notch, the convex block extends into the groove, and the fork foot block extends into the second groove.
Description
Technical Field
The invention relates to a power takeoff, in particular to a direct-drive rear power takeoff integrated with an operating mechanism.
Background
The power takeoff is an important part of special vehicles such as a dumper, a sprinkler, a crane and the like. According to different power takeoff demands, the type and the structure of the power takeoff are greatly different, but in terms of design, the power takeoff is required to be compact in structure, high in reliability and simple to assemble.
At present, a common power takeoff structure mainly comprises an input shaft assembly, an output shaft assembly and a control device; wherein, controlling means generally is the gas control mode, contains parts such as declutch shift shaft, shift fork, piston cylinder, piston fixed spring, reset spring, generally adopts elasticity cylindric lock or little screw fixation between shift fork and the declutch shift shaft, but this kind of fixed mode exists the risk that the cylindric lock is sheared or the screw is not hard up for declutch shift shaft and shift fork are easily not hard up, lead to the gear engagement inaccurate, greatly reduced the reliability of power takeoff. In addition, the piston cylinder of the operating device is generally arranged at an axial position of the power takeoff housing, and the long declutch shift shaft can cause the overall axial size of the power takeoff to be large.
Disclosure of Invention
The invention provides a direct-drive rear power takeoff integrated with an operating mechanism, aiming at solving the technical problems that the reliability of the power takeoff is reduced and the axial size of the power takeoff is larger due to the risk of looseness of a shifting fork and a shifting fork shaft in the conventional power takeoff.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a direct drive type rear power takeoff integrated with an operating mechanism is characterized in that: comprises a power takeoff shell, an output shaft, a through shaft, a sliding sleeve and an operating device;
the output shaft is arranged on the power takeoff shell, one end of the output shaft is positioned outside the power takeoff shell, and the other end of the output shaft is coaxial with the through shaft;
the sliding sleeve is sleeved on the output shaft in a spline connection mode, and a second groove is formed in the outer circular surface of the sliding sleeve;
the power takeoff device comprises a power takeoff shell, a transmission device and a control device, wherein the power takeoff shell is vertically communicated with the cylinder shell;
the outer circular surface of the gear engaging shaft is provided with a convex block, and the end part of the gear engaging shaft is provided with a fork foot block;
the hanging and blocking shaft penetrates through the notch, the convex block extends into the groove, and the fork foot block extends into the second groove. When the piston compresses the return spring, the gear engaging shaft is rotated, and then the fork foot block on the gear engaging shaft drives the sliding sleeve to move along the axial direction of the output shaft, so that the sliding sleeve is simultaneously meshed with the output shaft and the through shaft, and the power takeoff is in a gear engaging state.
Furthermore, the inner surface of the cylinder shell is provided with a positioning arc-shaped groove matched with the outer circular surface of the gear engaging shaft.
Further, the cylinder housing and the power takeoff housing are designed in an integrated manner.
Furthermore, the outer contour of the convex block matched with the groove is an arc surface.
Furthermore, spring accommodating grooves are formed in the end face of the piston and the inner wall of the cylinder shell.
Further, the fork foot block is a fork foot copper block.
Compared with the prior art, the invention has the advantages that:
the power takeoff adopts a gear engaging shaft to replace the conventional structure of a shifting fork and a shifting fork shaft, and is matched with a piston with a special structure to achieve the purpose of engaging gears. The risk that the existing shifting fork and the shifting fork shaft fall off is eliminated, the axial size of the operating device is greatly reduced, and the overall axial size of the power takeoff is smaller; meanwhile, the operating device has fewer parts, so that the overall reliability of the power takeoff is improved, and the cost is reduced.
Drawings
FIG. 1 is a schematic structural view of a direct drive rear power takeoff with a neutral gear (not in operation) of an integrated operating mechanism of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a schematic structural diagram of the direct drive rear power takeoff with the integrated operating mechanism of the present invention in a gear engaging state (during operation);
FIG. 5 is a cross-sectional view C-C of FIG. 4;
FIG. 6 is a first schematic view of a first gear engaging shaft of the direct drive rear power takeoff integrated with the control mechanism of the present invention;
FIG. 7 is a second schematic view of a second gear engaging shaft of the direct drive rear power takeoff integrated with the control mechanism of the present invention;
FIG. 8 is a third schematic view of a third gear shaft structure of the direct drive rear power takeoff of the integrated operating mechanism of the present invention;
wherein the reference numbers are as follows:
01-power takeoff housing, 1-cylinder housing, 2-piston, 21-notch, 22-groove, 3-gear shaft, 31-lug, 32-shaft sleeve, 4-output shaft, 5-snap spring, 6-deep groove ball bearing, 7-sliding sleeve, 71-second groove, 8-needle bearing, 9-through shaft, 10-fork foot block, 11-O-shaped ring, 12-cylinder cover, 13-return spring, 14-bowl plug, 15-positioning arc groove and 16-spring accommodating groove.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
As shown in fig. 1 to 3, a direct drive type rear power takeoff integrated with an operating mechanism mainly comprises a power takeoff shell 01, an output shaft 4, a through shaft 9, a sliding sleeve 7 and an operating device; the operating device comprises a cylinder shell 1, a gear engaging shaft 3, a piston 2 and a return spring 13, wherein the piston 2 and the return spring are arranged in the cylinder shell 1;
as shown in fig. 1, a horizontal axis is defined as + X axis to the right, a vertical plane is defined as + Y axis inwards, a vertical axis upwards is defined as + Z axis, an output shaft 4 is arranged on a power takeoff shell 01 along the Z axis direction, a cylinder shell 1 is arranged on the power takeoff shell 01 along the X axis direction, a piston reciprocates along the Y axis direction, and a gear engaging shaft 3 penetrates through the cylinder shell 1 along the X axis direction.
The output shaft 4 is arranged on the power takeoff shell 01 through the deep groove ball bearing 6, the axis of the output shaft 4 is parallel to the Z axis, the deep groove ball bearing 6 is limited through the snap spring 5, and the through shaft 9 is coaxially arranged at the lower end of the output shaft 4 through the needle roller bearing 8.
The cylinder shell 1 is vertically communicated with the power takeoff shell 01, and in the embodiment, the cylinder shell 1 and the power takeoff shell 01 can be designed in an integrated manner; the inner surface of the middle part of one side of the cylinder shell 1 is provided with a positioning arc-shaped groove 15 matched with the outer circular surface of the gear engaging shaft 3, the outer end surface of the cylinder shell 1 is provided with a cylinder cover 12, and the cylinder cover 12 is provided with an air inlet; in order to improve the sealing, an O-ring 11 is provided at the connection between the cylinder housing 1 and the cylinder head 12.
A notch 21 for the retaining shaft 3 to pass through is arranged on the side wall of the piston 2, a groove 22 is formed in the bottom of the notch 21, and an O-shaped ring is arranged between the piston 2 and the cylinder cover 12 for improving the sealing property;
the return spring 13 is arranged between the cylinder shell 1 and the piston 2, two ends of the return spring 13 are respectively limited by the end surface of the piston 2 and the inner wall of the cylinder shell 1, and in order to improve the stability of the return spring 13, the end surface of the piston 2 and the inner wall of the cylinder shell 1 are both provided with spring accommodating grooves 16;
the sliding sleeve 7 is arranged on the output shaft 4 and is meshed with the output shaft 4 in a spline mode, and a second groove 71 is formed in the sliding sleeve 7;
one end of the gear engaging shaft 3 is arranged in a shaft hole of the cylinder shell 1, a bowl-shaped plug piece 14 is arranged at the end part of one end of the gear engaging shaft 3, a fork foot block 10 matched with the sliding sleeve 7 is arranged on the outer surface of the end part of the other end of the gear engaging shaft 3, and the fork foot block 10 is a fork foot copper block in the embodiment; as shown in fig. 6 to 8, a convex block 31 matched with the groove is arranged on the outer circular surface of the gear shift shaft 3 located in the cylinder housing 1, the outer contour of the convex block 31 is a cambered surface, and the central angle between the convex block 31 and the fork foot block 10 along the circumferential direction is 103.5 degrees; the gear engaging shaft 3 is arranged in the notch 21 of the piston 2 in a penetrating manner, part of the excircle side surface of the gear engaging shaft 3 is arranged in the positioning arc-shaped groove 15, the convex block 31 of the gear engaging shaft 3 is arranged in the groove 22 of the piston 2, and the fork foot copper block 10 at the end part of the other end of the gear engaging shaft 3 is arranged in the second groove 71; the outer diameter of the matching position (shaft hole) of the gear shaft 3 and the cylinder shell 1 is larger than that of the position provided with the convex block.
The power takeoff of the embodiment adopts a gear engaging shaft 3 to replace a conventional shifting fork and shifting fork shaft structure, and achieves the purpose of gear shifting by matching with a piston 2 with a special structure. The risk that the existing shifting fork and the shifting fork shaft fall off is eliminated, the axial size of the cylinder shell is greatly reduced, the number of parts of the operating device is reduced, and the overall reliability of the power takeoff is improved, and the cost is reduced.
The working process of the power takeoff comprises the following steps:
as shown in fig. 1 to 3, the state diagrams of the components are shown when the power takeoff is not in operation: the cylinder shell 1 does not intake air at the moment, and the piston 2 is positioned at the lower end of the cylinder shell 1 under the action of the return spring 13; the gear shaft 3 is arranged in a shaft hole in the power takeoff shell 01, a convex block 31 on the gear shaft 3 is arranged in a groove 22 on the piston 2, and the gear shaft 3 can rotate along with the axial movement of the piston 2; since the position of the piston 2 is now fixed by the return spring 13, the rotational position of the catch shaft 3 is also fixed; a fork copper block arranged at the other end of the hanging and blocking shaft 3 is matched with the sliding sleeve 7, so that the hanging and blocking shaft 3 can stir the sliding sleeve 7 to move axially; the sliding sleeve 7 is shifted to the position shown in figure 2 by the gear engaging shaft 3 in a neutral state, and at the moment, the internal spline of the sliding sleeve 7 is only matched with the external spline of the output shaft 4.
As shown in fig. 4 and 5, the state diagrams of the parts are shown when the power takeoff works: the cylinder shell 1 is used for air inlet through an air inlet at the lower part of the cylinder cover 12, so that the piston 2 moves upwards against the pretightening force of the return spring 13; the gear shaft 3 is arranged in a shaft hole in the power takeoff shell 01, a convex block 31 on the gear shaft 3 is arranged in a groove 22 on the piston 2, and when the piston 2 moves upwards due to air inlet of the cylinder, the gear shaft 3 rotates due to the matching of the convex block and the groove 22; the other end of the gear shaft 3 is provided with a fork copper block which can shift the sliding sleeve 7 to move axially; when the gear engaging shaft 3 rotates, the sliding sleeve 7 is driven to move to the position shown in fig. 4 along the axial direction, the internal spline of the sliding sleeve 7 is meshed with the external spline of the through shaft 9, the sliding sleeve 7 is meshed with the output shaft 4 and the through shaft 9 at the same time, the power takeoff is in a gear engaging state, and the power takeoff outputs power.
The above description is only for the purpose of describing the preferred embodiments of the present invention and does not limit the technical solutions of the present invention, and any known modifications made by those skilled in the art based on the main technical concepts of the present invention fall within the technical scope of the present invention.
Claims (6)
1. The utility model provides a direct drive formula rear power takeoff of integrated operating mechanism which characterized in that: comprises a power takeoff shell (01), an output shaft (4), a through shaft (9), a sliding sleeve (7) and an operating device;
the output shaft (4) is arranged on the power takeoff shell (01), one end of the output shaft is positioned outside the power takeoff shell (01), and the other end of the output shaft is coaxial with the through shaft (9);
the sliding sleeve (7) is sleeved on the output shaft (4) in a spline connection mode, and a second groove (71) is formed in the outer circular surface of the sliding sleeve (7);
the operating device comprises a cylinder shell (1), a gear engaging shaft (3), and a return spring (13) and a piston (2) which are sequentially arranged in the cylinder shell (1) from inside to outside, wherein the power takeoff shell (01) is vertically communicated with the cylinder shell (1), a notch (21) is formed in the side wall of the piston (2), and a groove (22) is formed in the bottom of the notch (21);
the outer circular surface of the gear hanging shaft (3) is provided with a convex block (31), and the end part of the gear hanging shaft is provided with a fork foot block (10);
the gear hanging shaft (3) penetrates through the notch (21), the convex block extends into the groove (22), and the fork foot block (10) extends into the second groove (71).
2. The direct drive rear power takeoff integrated with an operating mechanism according to claim 1, wherein: the inner surface of the cylinder shell (1) is provided with a positioning arc-shaped groove (15) matched with the outer circular surface of the gear hanging shaft (3).
3. The direct drive rear power takeoff integrated with an operating mechanism according to claim 1, wherein: the cylinder shell (1) and the power takeoff shell (01) are designed in an integrated mode.
4. The direct drive rear power takeoff of integrated steering mechanism of claim 1, 2 or 3, wherein: the outer contour of the lug (31) matched with the groove (22) is an arc surface.
5. The direct drive rear power takeoff integrated with an operating mechanism of claim 4, wherein: and spring accommodating grooves (16) are formed in the end face of the piston (2) and the inner wall of the cylinder shell (1).
6. The direct drive rear power takeoff integrated with an operating mechanism according to claim 1, wherein: the fork foot block (10) is a fork foot copper block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010987329.7A CN112145678A (en) | 2020-09-18 | 2020-09-18 | Direct-drive rear power takeoff integrated with control mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010987329.7A CN112145678A (en) | 2020-09-18 | 2020-09-18 | Direct-drive rear power takeoff integrated with control mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112145678A true CN112145678A (en) | 2020-12-29 |
Family
ID=73892378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010987329.7A Pending CN112145678A (en) | 2020-09-18 | 2020-09-18 | Direct-drive rear power takeoff integrated with control mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112145678A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757363A (en) * | 2021-08-11 | 2021-12-07 | 江铃汽车股份有限公司 | Power takeoff of gearbox |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4402235A (en) * | 1979-05-18 | 1983-09-06 | Zahnradfabrik Friedrichshafen A.G. | Gearshift device |
| US20080264188A1 (en) * | 2007-04-30 | 2008-10-30 | Graves Damon B | Hydraulically operated shifter for power take-off |
| CN204037346U (en) * | 2014-06-27 | 2014-12-24 | 东风商用车有限公司 | A kind of directly rearmounted power takeoff of export structure |
| CN205371599U (en) * | 2015-12-26 | 2016-07-06 | 綦江齿轮传动有限公司 | Split selection keeps off, operating mechanism shifts |
| RU2659768C1 (en) * | 2017-11-29 | 2018-07-03 | Анатолий Александрович Рыбаков | Method of switching gears in gearbox with magnetic fluid clutch |
-
2020
- 2020-09-18 CN CN202010987329.7A patent/CN112145678A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4402235A (en) * | 1979-05-18 | 1983-09-06 | Zahnradfabrik Friedrichshafen A.G. | Gearshift device |
| US20080264188A1 (en) * | 2007-04-30 | 2008-10-30 | Graves Damon B | Hydraulically operated shifter for power take-off |
| CN204037346U (en) * | 2014-06-27 | 2014-12-24 | 东风商用车有限公司 | A kind of directly rearmounted power takeoff of export structure |
| CN205371599U (en) * | 2015-12-26 | 2016-07-06 | 綦江齿轮传动有限公司 | Split selection keeps off, operating mechanism shifts |
| RU2659768C1 (en) * | 2017-11-29 | 2018-07-03 | Анатолий Александрович Рыбаков | Method of switching gears in gearbox with magnetic fluid clutch |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757363A (en) * | 2021-08-11 | 2021-12-07 | 江铃汽车股份有限公司 | Power takeoff of gearbox |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204061752U (en) | A kind of two gear gearboxes | |
| CN201224088Y (en) | Multifunctional electric hammer | |
| CN112145678A (en) | Direct-drive rear power takeoff integrated with control mechanism | |
| CN205877157U (en) | Two rod handling top cover assembly of heavy derailleur | |
| CN110107424B (en) | Variable-height piston with end face gear ring | |
| CN108425763B (en) | Variable compression ratio piston with trapezoidal thread and internal tooth transmission structure | |
| CN210829517U (en) | External gear type variable-height piston | |
| US2796856A (en) | Autoamtically releasable coupling | |
| CN108179923A (en) | A kind of intelligent door lock clutch transmission | |
| CN210127907U (en) | Variable-height piston with end face gear ring | |
| CN113028018B (en) | Transmission device | |
| CN104455397B (en) | Shifter in three function electric hammer | |
| CN205663835U (en) | Take full -power power takeoff device of forced cooling system | |
| CN214998066U (en) | Ball screw rod type fracturing pump based on one-way motor drive | |
| CN111779812B (en) | Mechanical speed reducer capable of outputting reciprocating swing | |
| CN209919921U (en) | Inner rotor motor drive integration joint | |
| CN204327949U (en) | Gearshift mechanism in three function electric hammer | |
| CN211599417U (en) | Special planetary reducer of air cycle | |
| CN208534624U (en) | A kind of mid-ships engine and vehicle | |
| CN110043657B (en) | Gear shifting mechanism of motorcycle engine speed changer | |
| CN112502931A (en) | Ball screw rod type fracturing pump based on one-way motor drive | |
| CN208053085U (en) | A kind of power mixing arrangement | |
| CN109281813B (en) | Electrically driven gear transmission plunger pump | |
| CN104455396B (en) | Shifter in four function electric hammers | |
| CN209245217U (en) | Shift-selecting and changing actuating mechanism, gearbox and vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201229 |