TWM527828U - Electric tricycle transmission system - Google Patents

Abstract

An electric tricycle transmission system, comprising a body, a drive motor, a transmission and a shift mechanism. Transmission connection sleeve fitted to the drive motor power output shaft. Transmission planetary gear set provided in connection sleeve, which comprises a sun gear, a plurality of planetary gears and the central axis, torque input planet carrier, planet carrier torque output member and an outer ring gear, the sun gear having a first contact surface, torque input planet carrier having a second contact surface. Fit clutch transmission in connection sleeve, can slide to move to the first and second position. When the clutch is in the first position, the first nip surface presses the first contact surface; when the clutch is in the second position, the second nip face oppression second contact surface. Shift mechanism includes the clutch slip and maintain the actuating mechanism of the first or second position.

Description

Transmission system for electric tricycle

The present invention relates to a shifting system for an electric tricycle, and more particularly to a two-stage planetary gear shifting mechanism connected by a motor power output shaft, and switching the power output shaft to the planet carrier or the sun gear by a shifting mechanism Connected shifting system.

At present, in the application field of electric tricycles, the overall weight is strictly controlled due to the limitation of the battery's endurance performance. Under this premise, the volume of the electric tricycle is very limited, so it is impossible to use a large-sized stepless transmission or a conventional gearbox mechanism such as a five-speed gear.

However, general-purpose tricycles do not pay attention to their speed. However, due to the daily use environment, it is still necessary to drive some long small slopes or steep slopes (such as the underground parking lot of the building). Minimize the need for shifting gears for lightweight, small-volume gearboxes.

The purpose of the present invention is to provide a shifting system for an electric tricycle, which is a power output shaft of a driving motor, which is connected to a sun gear or a carrier of different speeds of a planetary gear type transmission by a shifting mechanism to achieve different speeds. Output.

In order to achieve the above-mentioned purpose, the shifting system of the electric tricycle provided by the present invention comprises: a frame fixed to the body of the electric tricycle; and a drive set in the frame a motor having a power output shaft; a gearbox including a box body, a connecting sleeve, a planetary gear set and a clutch: the box body is disposed on the frame body, and has an accommodation space therein; the connection sleeve is disposed in the capacity The space has a head end and a tail end, the head end is nested in the power output shaft; the planetary gear set includes a sun gear, a plurality of planet gears and a planetary gear center axis thereof, and a torque input planet carrier for the planetary gear center The shaft is fixedly coupled thereto, the planetary frame torsion output member is fixed to the central axis of the planetary gears opposite to one side of the torque input carrier, and the outer ring gear is fixed to the accommodating space for meshing with the planetary gears. One side of the sun gear has a sun gear shaft that is mated at the tail end and a sun gear torsion input member that has a first contact surface, the torsion input planet carrier has a second contact surface, and the planet carrier torque output member has a protrusion Out of the torque output shaft of the box; and the clutch system is axially fitted on the connecting sleeve and synchronously rotated, and can be in a reference position on the surface of the connecting sleeve, Sliding between the position and a second position, the clutch has a first pressing surface and a second pressing surface, and the clutch is not in contact with the first pressing surface or the second pressing surface when the clutch is located at the reference position When the clutch is in the first position, the first pressing surface engages and presses the first contact surface to drive the sun gear torque input member to rotate. When the clutch is in the second position, the second pressing The surface system engages and compresses the second contact surface to drive the torque input planet carrier to rotate; and a shifting mechanism is disposed on the frame body, and includes a ring sleeve and is fixed to the clutch shifting block and the clutch Extending from the outside of the casing into the accommodating space and pushing the shifting push block to cause the clutch to slide and maintain the actuating mechanism in the first position or the second position.

As described above, the features of the present invention include: the present application uses a planetary gear type shifting mechanism to drive the power of the motor to the sun gear in the shifting mechanism with a shifting mechanism to maintain the original output speed of the drive motor. Or engaging the sun gear to separate the face to the transmission The planetary carrier in the structure, in order to reduce the output speed, to achieve a small-sized, easy, flattened two-stage speed gear (three gears if there is a gap).

1‧‧‧Transmission system

10‧‧‧ ‧ body

20‧‧‧Drive motor

21‧‧‧Power output shaft

30‧‧‧Transmission

31‧‧‧ cabinet

311‧‧‧ accommodating space

32‧‧‧Connecting bushings

321‧‧‧ head end

322‧‧‧End

323‧‧‧rail structure

33‧‧‧ planetary gear set

331‧‧‧Sun Gear

3311‧‧‧Sun gear shaft

3312‧‧‧Sun Gear Torque Input

33121‧‧‧First contact surface

332‧‧‧ planetary gear

3321‧‧‧ planetary gear central axis

333‧‧‧Torque input planet carrier

3331‧‧‧Second contact surface

334‧‧‧ Planetary Torque Output

3341‧‧‧Torque output shaft

335‧‧‧ outer ring gear

34‧‧‧Clutch

341‧‧‧First press fit

342‧‧‧Second press surface

343‧‧‧ external thread

344‧‧‧Inner hole

3441‧‧‧Guide structure

40‧‧‧Shifting mechanism

41‧‧‧Shifting block

411‧‧‧ internal thread

412‧‧‧ Groove

42‧‧‧Activity agency

421‧‧‧Put

422‧‧‧ Connecting rod

4221‧‧‧ cogging

4222‧‧‧Slots

423‧‧ ‧ tooth column

4231‧‧‧ head end

42311‧‧‧ teeth

424‧‧‧ fork

4241‧‧‧ fork

425‧‧‧ fork shaft

50‧‧‧Sprocket

60‧‧‧Hydraulic cylinder

N‧‧‧ reference position

D1‧‧‧ first position

D2‧‧‧ second position

F1, F2, F3‧‧‧ Torque transmission path

1 is a perspective exploded view of an embodiment of a shifting system of an electric tricycle of the present invention; FIG. 2 is a perspective assembled view of FIG. 1; FIG. 3 is a side cross-sectional view of FIG. 2; A top cross-sectional view of an embodiment of a neutral gear of the system; FIG. 5 is a top cross-sectional view of a first gear of the shifting system of the electric tricycle of the present invention; FIG. 6 is a shifting system of the electric tricycle of the present invention. A top cross-sectional view of an embodiment of the second gear.

The present invention is described in detail below with reference to the drawings, and the drawings are simplified schematic diagrams, and the basic structure of the present invention is only illustrated in a schematic manner, and therefore only the components related to the present creation are indicated in the drawings. The components shown are not drawn in the number, shape, size ratio, etc. at the time of implementation, and the actual size of the implementation is a selective design, and the component layout form may be more complicated.

As shown in Figure 1, Figure 2, Figure 3 and Figure 4. The shifting system 1 of the electric tricycle of the present embodiment includes a frame body 10, a drive motor 20, a gearbox 30, and a shifting mechanism 40. The frame body 10 is provided with the drive motor 20, the gearbox 30, and the shifting mechanism 40. The drive motor 20 is disposed on the frame body 10 and has a power output shaft 21; the gearbox 30 includes: a box body 31, a connecting sleeve 32, a planetary gear set 33 and a clutch 34. The housing 31 is disposed on the frame body 10 and has an accommodating space 311 therein. The connecting sleeve 32 is The accommodating space 311 has a head end 321 and a tail end 322 facing away from the head end 321 . The tail end 322 is nested in the power output shaft 21 for transmitting the torque of the power output shaft 21 . The planetary gear set 33 is disposed at the head end 321 of the connecting sleeve 32, and includes a sun gear 331, a plurality of planetary gears 332 meshing with the sun gear 331 and corresponding to the planetary gears 332. a planetary gear central axis 3321 that is freely rotatable relative to the planetary gear 332 (for example, a bearing is disposed at a center of the planetary gear 332, and the planetary gear central shaft 3321 is inserted into the center of the bearing to make the planet a gear center shaft 3321 is freely rotatable, a torque input planet carrier 333 for fixing the planetary gear center shafts 3321, and a planet carrier fixed to the planetary gear center axis 3321 opposite to the torque input planet carrier 333 a torque output member 334 and an outer ring gear 335 fixed to the accommodating space 311 for engaging the planetary gears 332, the sun gear 331 having a sun gear rotatably inserted in the head end 321 Axis 3311 and one too a male gear torque input member 3312 having a first contact surface 33121 (in one embodiment, the sun gear torque input member 3312 is formed by extending outwardly from the side of the sun gear 331 The inner edge surface of the disk body is the first contact surface 33121), and the torque input planet carrier 333 has a second contact surface 3331 (in one embodiment, the torque input planet carrier 333 is an outwardly extending disk) The inner edge surface of the disk body is the second contact surface 3331), the planetary frame torque output member 334 has a torque output shaft 3341 extending from the casing 31, and the clutch 34 is axially fitted to the body Connecting the sleeve 32 and rotating synchronously therewith, and sliding to a first position D1 at a reference position N of the surface of the connecting sleeve 32 and opposite to the first position D1 with respect to the reference position N a second position D2 (in an embodiment, as shown in FIG. 5, the first position D1 is relative to the position of the reference position N near the head end 321 of the connecting sleeve 32, the second position D2 Relative to the position of the reference position N near the tail end 322 of the connecting sleeve 32) The clutch 34 has a The first pressing surface 341 and the second pressing surface 342 are not in contact with the first pressing surface 341 or the second pressing surface 342 when the clutch 34 is at the reference position N, and the clutch 34 is located at the first position In a position D1, the first pressing surface 341 engages and presses the first contact surface 33121 to drive the sun gear torque input member 3312 to rotate, and the clutch 34 is located at the second position D2, the second pressing The surface 342 is coupled to and presses the second contact surface 3331 to drive the torque input carrier 333 to rotate; and the shifting mechanism 40 is assembled to the frame 10, and includes a ring sleeve and is fixed to the clutch 34. The shifting block 41 and the actuating mechanism 42 extend from the outside of the casing 31 into the accommodating space 311, and rotatably buckle and push and pull the shifting push block 41 to make the clutch 34 Sliding and maintaining at the reference position N, the first position D1 or the second position D2.

In practical terms, as shown in FIG. 4, FIG. 5 and FIG. 6, the shift push block 41 is a wheel having an inner diameter 411 and a groove having a groove 412, and the surface of the clutch 34 corresponds to the change. The fixed position of the push block 41 has an external thread 343. The shift push block 41 is screwed to the external thread 343 of the surface of the clutch 34. The actuating mechanism 42 of the clutch 34 includes a a push rod 421, a connecting rod 422, a tooth column 423, a shifting fork 424 and a fork rotating shaft 425. The tooth column 423 is rotatably disposed in the accommodating space 311 and a head end 4231 extends out of the box body. The yoke 423 is fixed to the yoke 424 in the accommodating space 311. The yoke 424 has a fork 4241. The fork and the tail end of the fork 4241 are rotatably pivoted respectively. a rotating shaft 425, and the pair of fork rotating shafts 425 are fastened in the groove 412 of the shifting push block 41, and are at two ends of the diameter (ie, the connecting points of the two ends pass through the shaft center), The head end 4231 of the tooth column 423 is fixed to one end of the connecting rod 422 (for example, the tooth 42231 is provided at the head end 4231 of the tooth column 423, and one end of the connecting rod 422 is provided with a tooth groove and is fixed to each other to fix the two. Simultaneously rotating, the opposite end of the connecting rod 422 has a slot 4222, and is connected to the push rod 421 through a slot through a screw, by applying the push rod 421 an axial thrust or a The axial pulling force (for example, the hydraulic cylinder 60 is used to push and pull the push rod 421) to rotate the connecting rod 422 with the axis of the tooth column 423 as a center, and synchronously drive the tooth column 423 to rotate, so that the shifting fork 424 is formed. The shifting push block 41 is driven by the shifting lever 425 to synchronously drive the clutch 34 to stop at the reference position N, the first position D1 and the second position D2.

Further, when the clutch 34 is parked at the reference position N, the link 422 is located at the origin, and the first pressing surface 341 and the second pressing surface 342 of the clutch 34 are not in contact with the first contact. The surface 33121 or the second contact surface 3331 is in contact, and the torque input by the power output shaft 21 is transmitted to the clutch 34 by the connecting sleeve 32 to make it idle - that is, a neutral position, as shown in FIG. a transfer path F1); when the clutch 34 is parked in the first position D1, the link 422 is pushed away from the drive motor 20 such that the first pressing surface 341 is in contact with the first contact surface 33121 (clutch) The second pressing surface 342 of the 34 is separated from the second contact surface 3331. At this time, the torque input by the power output shaft 21 is transmitted to the clutch 34 and the sun gear torque input member 3312 by the connecting sleeve 32. The sun gear 331, the planetary gear 332, the planetary gear central shaft 3321, the planetary carrier torque output member 334, and the torque output shaft 3341 (such as the torque transmission path F2 of FIG. 5) - this is the first gear position; the clutch 34 is parked in At the second position D2, the link 422 faces the side of the drive motor 20 Retracting, the second pressing surface 342 of the clutch 34 is in contact with the second contact surface 3331 (while the first pressing surface 341 is not in contact with the first contact surface 33121), and is input by the power output shaft 21 at this time. The torque is transmitted to the clutch 34, the torque input carrier 333, the planetary gear central shaft 3321, the planetary carrier torque output member 334, and the torque output shaft 3341 (such as the torque transmission path F3 of FIG. 6) by the connecting sleeve 32. That is the second gear.

In an embodiment, the outer surface of the connecting sleeve 32 is provided with a rail structure 323, and the clutch 34 is sleeved on the outer surface of the connecting sleeve 32 by an inner sleeve hole 344. The 344 has a channel structure 3441 that cooperates with the rail structure 323 of the outer surface of the connecting sleeve 32.

In one embodiment, the surface of the clutch 34 has a large diameter that protrudes in a ring shape, and the outer ring surface of the large diameter forms a biconical surface, and the biconical surface is the first pressing surface 341 and the second pressing Face 342, of course, the biconical surface can be a flat surface or a curved surface (the tapered surface of the embodiment is a flat surface). Moreover, the first contact surface 33121, the second contact surface 3331, the first pressing surface 341 and a second pressing surface 342 are surfaces with high wear resistance and high friction coefficient, so as to facilitate frequent shifting. A certain degree of durability can still be maintained under the action.

In an embodiment, the torque output shaft 3341 further includes a sprocket 50 or a pulley (not shown) disposed thereon to facilitate the two different rotational speeds (torque) output by the shifting system. The vehicle is driven by a reduction gear (or differential) that is driven by a chain or belt to the rear wheel of the vehicle.

The embodiments or examples of the technical means employed in the foregoing are not intended to limit the scope of implementation of the present patent. Any change or modification that is consistent with the scope of the patent application scope of this creation or the scope of the patent creation is covered by the scope of the creation patent.

1‧‧‧Transmission system

10‧‧‧ ‧ body

20‧‧‧Drive motor

21‧‧‧Power output shaft

30‧‧‧Transmission

31‧‧‧ cabinet

311‧‧‧ accommodating space

32‧‧‧Connecting bushings

321‧‧‧ head end

322‧‧‧End

323‧‧‧rail structure

33‧‧‧ planetary gear set

331‧‧‧Sun Gear

3311‧‧‧Sun gear shaft

3312‧‧‧Sun Gear Torque Input

332‧‧‧ planetary gear

3321‧‧‧ planetary gear central axis

333‧‧‧Torque input planet carrier

334‧‧‧ Planetary Torque Output

3341‧‧‧Torque output shaft

335‧‧‧ outer ring gear

34‧‧‧Clutch

341‧‧‧First press fit

342‧‧‧Second press surface

343‧‧‧ external thread

344‧‧‧Inner hole

3441‧‧‧Guide structure

40‧‧‧Shifting mechanism

41‧‧‧Shifting block

411‧‧‧ internal thread

412‧‧‧ Groove

42‧‧‧Activity agency

421‧‧‧Put

422‧‧‧ Connecting rod

4221‧‧‧ cogging

4222‧‧‧Slots

423‧‧ ‧ tooth column

4231‧‧‧ head end

42311‧‧‧ teeth

424‧‧‧ fork

4241‧‧‧ fork

425‧‧‧ fork shaft

50‧‧‧Sprocket

60‧‧‧Hydraulic cylinder

Claims (10)

A shifting system for an electric tricycle includes: a frame body; a drive motor disposed on the frame body and having a power output shaft; and a gearbox comprising: a box body disposed on the frame body The inner sleeve has an accommodating space; a connecting sleeve is disposed in the accommodating space, and has a head end and a tail end facing away from the head end, the tail end is nested in the power output shaft; a planet a gear set is disposed at the head end of the connecting sleeve, and includes a sun gear, a plurality of planetary gears meshing with the sun gear, and a corresponding freely rotatable planetary gear center shaft, and a planetary gear a center shaft fixed torque input planet carrier, a carrier torque output member fixed to an opposite side of the planetary gear center axis from the torsion input carrier, and a fixed to the accommodating space and for the planetary gears An engaged outer ring gear having a sun gear shaft rotatably inserted in the tail end and a sun gear torque input member, the sun gear torque input member having a first contact surface, the torque lose The planet carrier has a second contact surface, the carrier torque output member has a torsion output shaft extending out of the casing; and a clutch is axially fitted to the coupling sleeve and rotates synchronously therewith a reference position of the surface of the connecting sleeve slides to a first position and a second position opposite thereto, the clutch has a first pressing surface and a second pressing surface, and the clutch is located at the reference position Not contacting the first pressing surface or the second pressing surface. When the clutch is in the first position, the first pressing surface engages and presses the first contact a surface of the sun gear torsion input member, wherein the second pressing surface engages and presses the second contact surface to drive the torque input planet carrier to rotate; and a shifting gear The mechanism is disposed on the frame body, and includes a ring sleeve and is fixed to the shifting push block of the clutch and extends from the outside of the box to the accommodating space, and is rotatably buckled and pushed and pulled to shift the push block Actuating mechanism for sliding the clutch and maintaining the reference position, the first position or the second position. The shifting system of the electric tricycle according to the first aspect of the invention, wherein the outer surface of the connecting bushing is provided with a rail structure, and the clutch is sleeved on an outer surface of the connecting bushing with an inner sleeve hole, The inner sleeve hole has a channel structure that cooperates with the rail structure of the outer surface of the connection sleeve. The shifting system of the electric tricycle according to claim 1, wherein the first position is relative to the reference position of the head end of the connecting sleeve, and the second position is relative to the reference position. It is close to the position of the end of the connecting sleeve. The shifting system of the electric tricycle according to the first aspect of the invention, wherein the first contact surface, the second contact surface, the first pressing surface and the second pressing surface are highly wear resistant, Surface with high coefficient of friction. The shifting system of the electric tricycle according to claim 1, wherein a sprocket or a pulley is further disposed on the torque output shaft. The shifting system of the electric tricycle according to claim 1, wherein the clutch surface has a large diameter protruding in a ring shape, and the outer ring surface of the large diameter forms a biconical surface, wherein the two tapered surfaces are respectively a pressing surface and the second pressing surface. The shifting system of the electric tricycle according to claim 6, wherein the two-cone surface is Plane or surface. The shifting system of the electric tricycle according to claim 6, wherein the sun gear torque input member is a disk body formed by extending outward from a side surface of the sun gear, and the inner edge surface of the disk body is the first A contact surface. The shifting system of the electric tricycle according to claim 6 or 8, wherein the torque input planet carrier is an outwardly extending disk body, and the inner edge surface of the disk body is the second contact surface. The shifting system of the electric tricycle according to the first aspect of the invention, wherein the shifting push block is a wheel having an internal thread and having a groove on the wheel surface, and the clutch surface corresponds to the shifting The fixed position of the push block has an external thread, and the shift push block is screwed to the outer surface of the clutch by the internal thread, and the actuating mechanism of the clutch comprises a push rod, a connecting rod and a tooth column. a shifting fork and a shifting fork shaft, the rack is rotatably disposed in the accommodating space, and a head end protrudes from the outside of the box, and the dent is fixed in the accommodating space, and the dial is fixed The fork has a fork, and the fork end and the tail end respectively rotatably pivot a fork shaft, and the pair of fork shafts are fastened in the groove of the shift push block and are diametrically At both ends, the head end of the stud is fixed to one end of the connecting rod, and the other end of the connecting rod has a slot and is connected to the push rod through a slot through a screw.