CN211474784U - Two-gear gearbox of electric vehicle - Google Patents
Two-gear gearbox of electric vehicle Download PDFInfo
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- CN211474784U CN211474784U CN201921243512.5U CN201921243512U CN211474784U CN 211474784 U CN211474784 U CN 211474784U CN 201921243512 U CN201921243512 U CN 201921243512U CN 211474784 U CN211474784 U CN 211474784U
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Abstract
The utility model discloses a two-gear gearbox of an electric vehicle, which comprises a box body and a motor, wherein a power input shaft, a power output shaft, a speed change mechanism and a flyweight are arranged in the box body, the flyweight is connected with the power output shaft, one end of the power input shaft is connected with the motor, and the other end of the power input shaft is connected with the power output shaft through the speed change mechanism; the speed change mechanism comprises a high-speed gear set and a low-speed gear set, wherein the high-speed gear set and the low-speed gear set are respectively provided with an overrunning clutch A and an overrunning clutch B.
Description
Technical Field
The utility model relates to a gearbox technique, concretely relates to two grades of gearboxes of electric motor car.
Background
The electric vehicle is popular with consumers due to simple and convenient operation, the output of the speed or the torque of the electric vehicle is generally determined by the magnitude of the current, but the current can only be changed within a certain range, the change range is limited, the electric vehicle at present has contradiction in the output of the speed and the torque, the best method for solving the contradiction is to solve the problem by adopting mechanical speed change, but the gear change of the existing mechanical speed changer on the market at present is relatively troublesome and can be realized by manual intervention.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing an electric motor car two grades of gearboxes, this gearbox can be in the road surface condition of reality or the load condition under the automatic switch-over keeps off the position as required, realize light gear shifting.
The utility model discloses an above-mentioned technical problem is solved to following technical means:
the utility model discloses a two-gear gearbox of electric vehicle, including box and motor, be equipped with power input shaft, power output shaft, speed change mechanism and flyweight in the box, the flyweight is connected with power output shaft, power input shaft one end is connected with the motor, and the other end passes through speed change mechanism and power output shaft connection; the speed change mechanism comprises a high-speed gear set and a low-speed gear set, wherein the high-speed gear set and the low-speed gear set are respectively provided with an overrunning clutch A and an overrunning clutch B.
Further, still include touch switch, touch switch one end is connected with the box, and the other end is connected with the flyweight.
Furthermore, the flyweight comprises a connecting seat, a gravity block and a push rod, the connecting seat is coaxially arranged at the end part of one end of the power output shaft, the connecting seat is provided with a fulcrum shaft, the gravity block is provided with a through hole, and the gravity block is connected with the connecting seat through the matching of the fulcrum shaft and the through hole; the connecting seat is further provided with a guide hole, the push rod is arranged in the guide hole and is in sliding fit with the guide hole, and the push rod is further connected with the gravity block.
Further, the guide hole and the power output shaft are coaxially arranged.
Furthermore, the push rod is equipped with the draw-in groove near the one end of gravity piece, the gravity piece is including erecting the piece and the horizontal piece, the through-hole sets up the crossing position of erecting the piece and horizontal piece, the tip of horizontal piece and the embedded connection of draw-in groove of push rod.
Further, the push rod further comprises a spring, one end of the spring is connected with the connecting seat, and the other end of the spring is connected with the push rod.
Further, the speed change mechanism further comprises a first countershaft and a second countershaft; the high-speed gear set comprises a first gear, a second gear and a third gear; the low-speed gear set comprises a fourth gear, a fifth gear, a sixth gear, a seventh gear, an eighth gear and a ninth gear; the first gear is connected with the power input shaft, the second gear is connected with the first countershaft and meshed with the first gear, and the third gear is connected with the power output shaft through the overrunning clutch A and meshed with the second gear; the fourth gear is connected with the power input shaft, the fifth gear is connected with the first countershaft and meshed with the fourth gear, the sixth gear is connected with the first countershaft, the seventh gear is connected with the second countershaft and meshed with the sixth gear, the eighth gear is connected with the second countershaft, the ninth gear is connected with the power output shaft and meshed with the eighth gear, and the overrunning clutch B is arranged between the connection of one of the seventh gear or the eighth gear and the second countershaft; the transmission direction of the overrunning clutch A is opposite to that of the overrunning clutch B.
The utility model discloses following beneficial effect has: the two-gear gearbox of the electric vehicle can enable the structure of the gearbox to be simpler through the arrangement of the two overrunning clutches with opposite transmission directions, and can realize the switching of gears through the forward rotation and the reverse rotation of the motor; the use environment of the gearbox can be judged through the arrangement of the flyweights, so that gears can be automatically switched according to the change of the environment.
Drawings
The invention is further described with reference to the following figures and examples.
Fig. 1 is a schematic perspective view of a two-gear transmission of an electric vehicle according to the present invention;
fig. 2 is a schematic view of the internal structure of the two-gear transmission of the electric vehicle according to the present invention;
fig. 3 is a sectional structure view of the two-gear transmission of the electric vehicle of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
A two-speed gearbox for an electric vehicle according to some embodiments of the present invention is described below with reference to fig. 1 to 3.
As shown in fig. 1 and 2, a two-gear transmission of an electric vehicle comprises a box body 1 and a motor 2, wherein the motor 2 is installed at one side of the box body 1, a power input shaft 3, a power output shaft 4, a speed change mechanism and a flyweight are arranged in the box body 1, one end of the power input shaft 3 extends out of the box body 1 and is connected with the motor 2, and the motor in this embodiment adopts a high-speed direct current motor capable of inputting power in a forward rotation direction or a reverse rotation direction to the transmission; because a high-speed motor is adopted, the speed of the electric vehicle needs to be reduced to improve the torque output; the power input shaft 3 is connected with the power output shaft 4 through a speed change mechanism which comprises a high-speed gear set, a low-speed gear set, a first auxiliary shaft 5 and a second auxiliary shaft 6; in order to obtain the same steering and different rotating speed effects of the power output shaft 4 by utilizing the positive rotation and the negative rotation of the motor, the high-speed gear set is provided with an overrunning clutch A7 with a one-way transmission effect, correspondingly, the low-speed gear set is provided with an overrunning clutch B8 with the transmission direction opposite to that of the overrunning clutch A7, and the transmission of one overrunning clutch can be ineffective when the motor rotates in one direction through the arrangement with the transmission direction opposite to that of the motor, so that only one group of speed change gears works no matter which direction the motor rotates.
The first auxiliary shaft 5, the second auxiliary shaft 6, the power input shaft 3 and the power output shaft 4 are all in a parallel relationship, and two ends of the first auxiliary shaft 5 and the second auxiliary shaft 6 are suspended in the box body 1 through mounting holes in the box body 1; the high speed gear set includes a first gear 91, a second gear 92 and a third gear 93; the first gear 91 is in transmission connection with the power input shaft 3, the second gear 92 is in transmission connection with the first countershaft 5 and meshed with the first gear 91, and the third gear 93 is in transmission connection with the power output shaft 4 through an overrunning clutch A7 and meshed with the second gear 92.
The low speed gear set includes a fourth gear, a fifth gear, a sixth gear 96, a seventh gear 97, an eighth gear 98, and a ninth gear 99; the fourth gear is connected with the power input shaft 3, the fifth gear is in transmission connection with the first countershaft 5 and is meshed with the fourth gear, the sixth gear 96 is in transmission connection with the first countershaft 5, the seventh gear 97 is in transmission connection with the second countershaft 6 through an overrunning clutch B8 and is meshed with the sixth gear 96, the eighth gear 98 is connected with the second countershaft 6, the ninth gear 99 is connected with the power output shaft 4 and is meshed with the eighth gear 98, it is noted that the overrunning clutch B8 can also be arranged between the eighth gear 98 and the second countershaft 6, and the obtained effect is the same as that between the seventh gear 97 and the second countershaft 6.
In the above technical solution, the first gear 91 and the fourth gear are multiplexed, that is, the first gear 91 and the fourth gear are combined into one; the second gear 92 and the fifth gear are multiplexed, that is, the second gear 92 and the fifth gear are combined into one. The integration level of the product can be improved through the arrangement, so that the structure is further simplified, and the cost is further saved.
In order to realize the automatic gear shifting of the gearbox in different use environments, as shown in fig. 3, the flyweight is arranged at one end of the power output shaft 4 close to the motor, a touch switch 10 is arranged at the position close to the flyweight and connected with the flyweight, and the touch switch 10 is arranged on the box body 1 and keeps a relatively fixed relation with the box body 1; the flyweight comprises a connecting seat 12, a gravity block 13 and a push rod 14, wherein the connecting seat 12 is of a circular structure and is coaxially arranged at the end position of one end of the power output shaft 4, the connecting seat 12 is provided with a fulcrum shaft 121, the gravity block 13 comprises a vertical block 131 and a transverse block 132, the length of the vertical block is longer than that of the transverse block, a through hole is formed in the crossed position of the vertical block 131 and the transverse block 132, and the gravity block 13 is connected with the connecting seat 12 through the matching of the fulcrum shaft 121 and the through hole.
A guide hole 122 is formed in the center of the connecting seat 12, the guide hole 122 and the power output shaft 4 are coaxially arranged, the push rod 14 is arranged in the guide hole 122 and is in sliding fit with the guide hole 122, a clamping groove 141 is formed in one end, close to the gravity block 13, of the push rod 14, the end portion of the transverse block 132 is connected with the clamping groove 141 of the push rod 14 in an embedded manner, and the gravity block 13 can be pried to slide the push rod 14 back and forth in the guide hole 122 by taking the fulcrum shaft 121 as a fulcrum through the arrangement; the touch switch 10 is connected with one end of the push rod 14, the push rod 14 moves back and forth to press the touch switch 10, so that the forward and reverse rotation of the motor is switched by using a pressing signal received by the touch switch, and the gear shifting operation is realized; in order to enable the vertical block 131 of the gravity block 13 to automatically fall to the center of the power output shaft 4, the push rod 14 is also sleeved with a spring 15, one end of the spring 15 props against the connecting seat, and the other end of the spring props against the push rod 14; meanwhile, under the action force of the spring 15, the push rod 14 abuts against the touch switch to enable the touch switch to be in a pressed state, a circuit of the motor in the state, which rotates in one direction, is switched on, when the motor rotates in the one direction, a low-speed gear set in the gearbox is in a working state, correspondingly, the output rotating speed of the power output shaft 4 is also slow, and conversely, when the press of the touch switch 10 is released, a circuit of the motor in the other rotating direction is switched on, when the motor rotates in the one direction, a high-speed gear set in the gearbox is in the working state, and correspondingly, the output rotating speed of the power output shaft 4 is also fast; in order to keep the balance of the flyweights in rotation, the number of the gravity blocks 13 is two in the present embodiment and the gravity blocks are arranged symmetrically with respect to the axis of the power output shaft 4.
After the gearbox is applied to an electric vehicle, the power output shaft 4 is connected with wheels, when the motor is powered on, the electric vehicle starts under the variable transmission of the low-speed gear set, the wheels are faster and faster along with the gradual increase of the speed after the electric vehicle starts, the rotating speed of the power output shaft 4 is correspondingly increased, the gravity block 13 of the flyweight prizes the push rod 14 to move under the action of centrifugal force, when the rotating speed reaches a certain value, the push rod 14 moves to the position where the pressing of the touch switch is completely removed, at the moment, the motor starts to rotate reversely, and therefore the electric vehicle is switched to the variable transmission of the high-speed gear set to run.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (7)
1. The utility model provides an electric motor car two grades of gearboxes which characterized in that: the box body is internally provided with a power input shaft, a power output shaft, a speed change mechanism and a flyweight, the flyweight is connected with the power output shaft, one end of the power input shaft is connected with the motor, and the other end of the power input shaft is connected with the power output shaft through the speed change mechanism; the speed change mechanism comprises a high-speed gear set and a low-speed gear set, wherein the high-speed gear set and the low-speed gear set are respectively provided with an overrunning clutch A and an overrunning clutch B.
2. The two-speed gearbox for electric vehicles according to claim 1, wherein: still include touch switch, touch switch one end is connected with the box, and the other end is connected with the flyweight.
3. The two-speed gearbox for electric vehicles according to claim 2, wherein: the flyweight comprises a connecting seat, a gravity block and a push rod, the connecting seat is coaxially arranged at the end part of one end of the power output shaft, the connecting seat is provided with a fulcrum shaft, the gravity block is provided with a through hole, and the gravity block is connected with the connecting seat through the matching of the fulcrum shaft and the through hole; the connecting seat is further provided with a guide hole, the push rod is arranged in the guide hole and is in sliding fit with the guide hole, and the push rod is further connected with the gravity block.
4. The two-speed gearbox for electric vehicles according to claim 3, wherein: the guide hole and the power output shaft are coaxially arranged.
5. The two-speed gearbox for electric vehicles according to claim 4, wherein: the push rod is close to the one end of gravity piece and is equipped with the draw-in groove, the gravity piece is including erecting the piece and the horizontal piece, the through-hole sets up the crossing position of erecting the piece and horizontal piece, the tip of horizontal piece and the embedded connection of draw-in groove of push rod.
6. The two-speed gearbox for electric vehicles according to claim 5, wherein: the push rod further comprises a spring, one end of the spring is connected with the connecting seat, and the other end of the spring is connected with the push rod.
7. The two-speed gearbox for electric vehicles according to claim 1, wherein: the speed change mechanism further comprises a first countershaft and a second countershaft; the high-speed gear set comprises a first gear, a second gear and a third gear; the low-speed gear set comprises a fourth gear, a fifth gear, a sixth gear, a seventh gear, an eighth gear and a ninth gear; the first gear is connected with the power input shaft, the second gear is connected with the first countershaft and meshed with the first gear, and the third gear is connected with the power output shaft through the overrunning clutch A and meshed with the second gear; the fourth gear is connected with the power input shaft, the fifth gear is connected with the first countershaft and meshed with the fourth gear, the sixth gear is connected with the first countershaft, the seventh gear is connected with the second countershaft and meshed with the sixth gear, the eighth gear is connected with the second countershaft, the ninth gear is connected with the power output shaft and meshed with the eighth gear, and the overrunning clutch B is arranged between the connection of one of the seventh gear or the eighth gear and the second countershaft; the transmission direction of the overrunning clutch A is opposite to that of the overrunning clutch B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921243512.5U CN211474784U (en) | 2019-08-02 | 2019-08-02 | Two-gear gearbox of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921243512.5U CN211474784U (en) | 2019-08-02 | 2019-08-02 | Two-gear gearbox of electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211474784U true CN211474784U (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921243512.5U Active CN211474784U (en) | 2019-08-02 | 2019-08-02 | Two-gear gearbox of electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211474784U (en) |
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2019
- 2019-08-02 CN CN201921243512.5U patent/CN211474784U/en active Active
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