CN214146553U - Electric control mechanical type gear shifting mechanism - Google Patents
Electric control mechanical type gear shifting mechanism Download PDFInfo
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- CN214146553U CN214146553U CN202022835773.5U CN202022835773U CN214146553U CN 214146553 U CN214146553 U CN 214146553U CN 202022835773 U CN202022835773 U CN 202022835773U CN 214146553 U CN214146553 U CN 214146553U
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- shifting fork
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Abstract
The utility model discloses an automatically controlled mechanical type gearshift, including actuating motor, one-level reduction gears, lead screw transmission structure and position detection part, actuating motor is connected with the input shaft transmission, amplifies the moment of torsion through one-level reduction gears, changes power direction of transfer through the lead screw, changes shift fork one end position, utilizes lever principle, changes the shifting block position indirectly to change the tooth cover position, through taking off the gear, neutral gear speed governing, the three process of putting into gear, accomplish two switches between keeping off the position. The mechanism has the advantages of simple structure, few parts, small size, compact structure, small gear shifting stroke, quick response, capability of meeting the gear shifting time and operation requirements of a common gearbox, exquisite structure, low cost and convenience in control, and can be installed inside the gearbox without occupying external space.
Description
Technical Field
The utility model relates to a gearshift belongs to derailleur actuating mechanism automobile parts field.
Background
With the development of science and technology and the improvement of the transportation level, pollution reduction and emission reduction become necessary and social development consensus. The electric vehicle serving as an urban transportation means is increasingly becoming a mainstream means of transportation, and the pure electric vehicle serving as an urban new energy transportation mainstream means of transportation accounts for 80%, so that pollution emission in cities can be reduced, urban air quality is maintained, and a larger health index is brought to people. However, as a pure electric vehicle, the driving range becomes one of the main factors restricting the sales volume of the pure electric vehicle, so that the efficiency of the motor is improved, the motor works in a high-efficiency area to the maximum extent, a two-gear or even multi-gear box becomes the first choice, the requirement on the gear shifting technology is increased day by day due to the increase of the gears of the gearbox, and aiming at the existing technical scheme, the space occupied by the mechanism is reduced while the gear shifting time is required to be shortened.
SUMMERY OF THE UTILITY MODEL
The aforesaid to prior art exists not enoughly, the utility model aims at providing an automatically controlled mechanical type gearshift, small and exquisite portable, the mountable is in the gearbox, and the shift time is short, and control is simple.
In order to achieve the above object, the utility model provides an electric control mechanical type gearshift, include
A shaft system and a gear are arranged in the shell, the shell is in a half-open design, one end of the shifting fork is movably connected in the shell and extends out of the shell, a detachable end cover is arranged at one end of the shell, the gear shifting mechanism is fixed in the gear box through the end cover,
the input shaft is a gear shaft and is fixed on the shell through bearings at two ends, the input shaft is connected with an actuating motor, the middle part of the input shaft is sleeved with a driving gear, the driving gear is fixedly connected with the input shaft,
an output shaft fixed on the shell through bearings at two ends, a screw rod arranged in the middle of the output shaft, a driven gear arranged on the output shaft and meshed with the driving gear, the screw rod can drive the screw rod to move through the input shaft, the driving gear and the driven gear under the drive of an actuating motor, a matched special-shaped nut is arranged on the screw rod, the actuating motor rotates forwards and backwards, the special-shaped nut moves horizontally and forwards,
the shifting fork can shift gears, the tail end of the shifting fork is hinged on the shell through a cylindrical pin, one end of the shifting fork is connected with the special-shaped nut, when the shifting fork is driven by the special-shaped nut to move, the other end of the shifting fork rotates around the cylindrical pin to realize gear switching,
the angle sensor is installed on the shell, as shown in fig. 4, a boss is arranged on the special-shaped nut, a sensor pin shaft is installed on the boss, the horizontal displacement of the special-shaped nut can be converted into the angular rotation of the sensor pin shaft, and the angle sensor detects the angular rotation to calculate the angle and the position of the shifting fork.
Further, the actuating motor is connected with the input shaft through a spline.
Furthermore, one end of the driven gear is positioned through a shaft shoulder, and the other end of the driven gear is positioned through a gasket and a clamp spring.
Furthermore, the shifting fork is of a two-piece structure, a cylindrical pin is inserted in the middle part of the shifting fork,
furthermore, symmetrical semicircular grooves are formed in the inner side of the shell, the special-shaped nuts are installed in the semicircular grooves, the semicircular grooves limit the special-shaped nuts, and the special-shaped nuts are kept in the same direction when the screw rod rotates to drive the nuts to move axially.
Furthermore, the sensor pin shaft is fixed on the shell through a bearing and a clamp spring, and the sensor pin shaft is made of resin materials.
The utility model discloses following beneficial effect has:
the position of the shifting fork is detected in real time through the angle sensor, the shaft shoulder and the shell are used for mechanical positioning, and unnecessary loss caused by the fact that detection errors exceed a mass production range is reduced. Meanwhile, mechanical limit is carried out by means of matching parts, so that the reliability is integrally improved; the mechanism is relatively independent, the material management is convenient, the structure is simple, and the gear engagement is rapid.
Drawings
Fig. 1 is a front view of an electric control mechanical type gear shift mechanism according to the present invention;
fig. 2 is the gear engaging schematic diagram of the electric control mechanical type gear shifting mechanism.
Fig. 3 is an internal structure view of the electric control mechanical type gear shifting mechanism of the present invention;
fig. 4 is the inside of automatically controlled mechanical type gearshift look sideways at the schematic diagram.
In the figure: 1. an actuator motor; 2. an input shaft; 3. a driving gear; 4. a driven gear; 5. a lead screw; 6. a special-shaped nut; 7. a shifting fork; 8. a cylindrical pin; 9. a sensor pin; 10. an end cap; 11. a housing; 12. an angle sensor.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in the attached drawings 1 and 3 of the specification, the utility model discloses an electric control mechanical type gear shifting mechanism, which comprises
An input shaft 2 which is a gear shaft is fixed on a shell 11 through bearings at two ends, the input shaft 2 is connected with an actuating motor 1, a driving gear 3 is sleeved in the middle of the input shaft 2, the driving gear 3 is fixedly connected with the input shaft 2,
an output shaft is fixed on a shell 11 through bearings at two ends, a screw 5 is arranged in the middle of the output shaft, a driven gear 4 is arranged on the output shaft, the driven gear 4 is meshed with a driving gear 3, the screw 5 can be driven by an actuating motor 1 to drive the screw 5 to move through an input shaft 2, the driving gear 3 and the driven gear 4, a matched special-shaped nut 6 is arranged on the screw 5, the actuating motor 1 rotates forwards and backwards, the special-shaped nut 6 moves back and forth horizontally,
a shifting fork 7 capable of shifting gears, wherein the tail end of the shifting fork 7 is hinged on the shell of the gearbox through a cylindrical pin 8, one end of the shifting fork 7 is connected with a special-shaped nut 6, when the shifting fork is driven by the special-shaped nut 6 to move, the other end of the shifting fork rotates around the cylindrical pin to realize gear switching,
the angle sensor 12 is installed on the shell 11, a boss is arranged on the special-shaped nut 6, a sensor pin shaft 9 is installed on the boss, the horizontal displacement of the special-shaped nut 6 can be converted into the angular rotation of the sensor pin shaft 9, and the angle sensor 12 detects the angular rotation to calculate the angle and the position of the shifting fork 7.
In practical application, the actuating motor 1 is connected with the input shaft 2 through a spline.
In practical application, one end of the driven gear 4 is positioned through a shaft shoulder, and the other end of the driven gear is positioned through a gasket and a clamp spring.
In practical application, the shifting fork is of a lever type structure, a cylindrical pin 8 is inserted into a middle fulcrum,
in practical application, symmetrical semicircular grooves are formed in the inner side of the shell 11, the special-shaped nuts 6 are installed in the semicircular grooves, the semicircular grooves limit the special-shaped nuts 6, and the special-shaped nuts 6 are kept in the same direction when the screw 5 rotates to drive the nuts to move axially.
In practical application, the sensor pin shaft 9 is fixed on the shell 11 through a bearing and a clamp spring, and the sensor pin shaft 9 is made of resin materials, so that the sensor pin shaft is wear-resistant and light in weight.
The end cover 10 is used as a connecting plate for connecting the gear shifting mechanism and the gearbox, the gear shifting mechanism assembly is fixed in the gearbox, the whole system only comprises a clamp spring, the other axial positioning is realized by utilizing the structures of a shaft shoulder and a shell 11, a driving gear 3 is in the form of a gear shaft, parts are reduced, a driven gear 4 is fixed on a screw rod 55 through a flat key and is axially fixed through the shaft shoulder and a gasket clamp spring, a ball is contained in an inner cavity of a special-shaped nut 6, the friction force with the screw rod 5 is reduced, the loss of the force is reduced, the stroke of the special-shaped nut 6 is limited through the gear and the shell 11, a cylindrical small boss is arranged on the end face of the special-shaped nut 6, when the special-shaped nut 6 moves, the movement along a mounting groove caused by the rotation of a sensor pin shaft 9 is driven, the rotation angle of the sensor pin shaft 9 is detected through an angle sensor 12, the stroke of the special-shaped nut 6 on the screw rod 5 is converted into the stroke, and the current position condition is rapidly detected through an electric signal, the safety is improved.
Specifically, the actuating motor 1 can realize forward/reverse rotation, so that forward/reverse rotation of the screw 5 is realized, the special-shaped nut 6 is controlled to move forward/backward, and switching between two gears is realized. Setting a stroke in a gear shifting program, and stopping executing the action of the motor 1 after the angle sensor 12 detects that the stroke reaches a set stroke range; and in the same reverse gear shifting manner, the mechanical limit strokes at the two ends are slightly longer than the theoretical gear shifting stroke, and when the sensor fails, gear shifting can be completed by utilizing mechanical limit.
The special-shaped nut 6 is cast with two symmetrical major arcs, two small circular grooves are processed at the corresponding positions of the shell 11 and matched with the arcs to realize the functions of guiding and radial positioning in the stroke range.
The utility model discloses a theory of operation:
as shown in the attached drawing 1 of the specification, under an initial gear, the shifting fork 7 is located at the position A, the shifting fork 7 is installed in the gear sleeve and is in clearance fit, when a gear shifting and gear engaging instruction is received, the execution motor 1 rotates, the input shaft 2 rotates, the driving gear 3 is meshed with the driven gear 4, the driven gear 4 drives the screw 5 to rotate, the screw 5 transmission mechanism drives the special-shaped nut 6 to move on the shaft and simultaneously drives the installation end of the shifting fork 7 to move, the shifting fork 7 is fixed with the gearbox shell by using the cylindrical pin 8, when one end moves, the other end of the shifting fork 7 rotates around the cylindrical pin 8, the other end of the shifting fork 7 is installed in the gear sleeve, so that the gear sleeve is driven to move axially, and when gear shifting is completed, the other end of the shifting fork 7 is located at the position B in the attached drawing 2 of the specification.
The special-shaped nut 6 drives the sensor pin shaft 9 connected with the special-shaped nut to rotate when moving, the sensor pin shaft 9 is installed in the angle sensor 12, the rotating angle of the sensor pin shaft 9 is detected by the angle sensor 12 and fed back to be a voltage signal, and the current displacement change can be read by the controller.
On the other hand, the position of the current special-shaped nut 6, namely the current gear, can be deduced through detecting the current angle position before gear shifting, when the gear is shifted to another gear, the transmission and detection principles are consistent, and the only difference is that the execution motor 1 is controlled to rotate reversely.
To sum up, the utility model carries out mechanical limit by means of matching parts, thereby improving the reliability of the whole body; the mechanism is relatively independent, the material management is convenient, the structure is simple, and the gear engagement is rapid.
It should be understood by those skilled in the art that the foregoing embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the present invention is to provide a person skilled in the art with the ability to understand the contents of the present invention and implement the same, and not to limit the scope of the present invention.
Claims (6)
1. An electrically controlled mechanical gear shift mechanism, characterized in that: comprises that
A shaft system and a gear are arranged in the shell (11), the shell (11) is of a half-open design, one end of the shifting fork is movably connected in the shell (11) and extends out of the shell (11), a detachable end cover (10) is arranged at one end of the shell (11), the gear shifting mechanism is fixed in the gearbox through the end cover (10),
the input shaft (2) is a gear shaft and is fixed on the shell (11) through bearings at two ends, the input shaft (2) is connected with an actuating motor (1), the middle part of the input shaft (2) is sleeved with a driving gear (3), the driving gear (3) is fixedly connected with the input shaft (2),
the output shaft is fixed on the shell (11) through bearings at two ends, the middle part of the output shaft is provided with a lead screw (5), a driven gear (4) is arranged on the output shaft, the driven gear (4) is meshed with the driving gear (3), the lead screw (5) can be driven by the execution motor (1) to drive the lead screw (5) to move through the input shaft (2), the driving gear (3) and the driven gear (4), the lead screw (5) is provided with a matched special-shaped nut (6), the execution motor (1) rotates forwards and backwards, the special-shaped nut (6) moves back and forth horizontally,
a shifting fork which can shift gears, the waist part of the shifting fork (7) is hinged on the shell of the gearbox through a cylindrical pin (8), one end of the shifting fork (7) is connected with a special-shaped nut (6), when the shifting fork is driven by the special-shaped nut (6) to move, the other end rotates around the cylindrical pin (8), a synchronizer gear sleeve is shifted to realize gear switching,
the angle sensor (12) is installed on the shell (11), a boss is arranged on the special-shaped nut (6), a sensor pin shaft (9) is installed on the boss, the horizontal displacement of the special-shaped nut (6) can be converted into the angular rotation of the sensor pin shaft (9), the angle sensor (12) is used for detecting, and the angle and the position of the shifting fork (7) are calculated.
2. The electronically controlled mechanical shift mechanism of claim 1, wherein: the actuating motor (1) is connected with the input shaft (2) through a spline.
3. The electronically controlled mechanical shift mechanism of claim 1, wherein: one end of the driven gear (4) is positioned through the shaft shoulder, and the other end of the driven gear is positioned through the gasket and the clamp spring.
4. The electronically controlled mechanical shift mechanism of claim 1, wherein: the shifting fork is of a lever type structure, and a cylindrical pin (8) is inserted into a middle fulcrum.
5. An electronically controlled mechanical shift mechanism according to claim 1 or 4, wherein: the inner side of the shell (11) is provided with symmetrical semicircular grooves, the special-shaped nuts (6) are arranged in the semicircular grooves, the semicircular grooves limit the special-shaped nuts (6), and the special-shaped nuts (6) are kept in the same direction when the screw rod (5) rotates to drive the nuts to move axially.
6. The electronically controlled mechanical shift mechanism of claim 5, wherein: the sensor pin shaft (9) is fixed on the shell (11) through a bearing and a clamp spring, and the sensor pin shaft (9) is made of resin materials and is wear-resistant and light in weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022835773.5U CN214146553U (en) | 2020-12-01 | 2020-12-01 | Electric control mechanical type gear shifting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022835773.5U CN214146553U (en) | 2020-12-01 | 2020-12-01 | Electric control mechanical type gear shifting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214146553U true CN214146553U (en) | 2021-09-07 |
Family
ID=77583214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022835773.5U Active CN214146553U (en) | 2020-12-01 | 2020-12-01 | Electric control mechanical type gear shifting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214146553U (en) |
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2020
- 2020-12-01 CN CN202022835773.5U patent/CN214146553U/en active Active
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