Planetary gear output structure of electric moped and electric moped

Abstract

The utility model belongs to the technical field of moped, disclose a kind of planetary gear output structure and electric moped of electric moped, the planetary gear output structure includes inner tooth ring, planet carrier, multiple planetary gears, sun gear, clutch support and clutch inner ring.Inner tooth ring is connected with the shell of electric moped's wheel hub motor, planet carrier is installed in inner tooth ring inside, multiple planetary gears rotatably installed in planet carrier, and mesh with inner tooth ring respectively, sun gear is connected with the rotor of wheel hub motor, sun gear is located in the radial inside of multiple planetary gears and mesh with multiple planetary gears, clutch support is connected with planet carrier, and located in the side of planetary gear away from planet carrier, clutch support has ratchet groove, clutch inner ring is installed in clutch support inside, and have the ratchet tooth matched with ratchet groove.The planetary gear output structure can better meet the power demand of wheel hub motor to steep slope section, and structure is simple, and the degree of integration is higher.

Description

Technical Field

[0001] This utility model relates to the field of electric bicycle technology, and in particular to a planetary gear output structure for an electric bicycle and an electric bicycle. Background Technology

[0002] Electric vehicle motors come in various forms depending on their operating environment and frequency, and each type has its own characteristics. Currently, permanent magnet DC motors are commonly used in electric vehicles. Electric vehicle motors can be broadly classified into brushed motors and brushless motors based on their power supply method; and into geared motors and gearless motors based on their mechanical structure. Currently used rear-mounted hub motors in the market suffer from insufficient power and cannot meet the power demands of steep inclines. Utility Model Content

[0003] The first objective of this invention is to provide a planetary gear output structure for an electric-assisted bicycle. This planetary gear output structure can better meet the power requirements of the hub motor on steep slopes, and it has a simple structure and high integration.

[0004] The second objective of this invention is to provide an electric-assisted bicycle with good climbing ability and long range.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model discloses a planetary gear output structure for an electric-assisted bicycle, comprising: an internal gear ring for connecting to the housing of a hub motor of the electric-assisted bicycle; a planetary carrier mounted inside the internal gear ring; multiple planetary gears rotatably mounted on the planetary carrier and meshing with the internal gear ring; a sun gear for connecting to the rotor of the hub motor, the sun gear being located radially inside the multiple planetary gears and meshing with them; a clutch bracket connected to the planetary carrier and located on the side of the planetary gears opposite to the planetary carrier, the clutch bracket having a ratchet groove; and a clutch inner ring mounted inside the clutch bracket and having ratchet teeth that engage with the ratchet groove, the clutch inner ring engaging with the motor shaft of the hub motor.

[0007] The beneficial effects of the planetary gear output structure of this utility model for electric-assisted bicycle are as follows: In practical operation, this planetary gear output structure has two power output modes. The first mode involves the hub motor starting and driving the sun gear to rotate. The sun gear drives the planetary gears meshing with it to rotate. At this time, the clutch support is engaged with the inner clutch ring. Since the inner clutch ring is connected to the motor shaft of the hub motor, the clutch support and the inner clutch ring remain stationary, causing the planetary support to also remain stationary. The power input from the sun gear can be output from the internal gear ring to drive the hub motor housing to rotate, thereby driving the wheel to rotate. The second mode involves the hub motor starting and driving the sun gear to rotate. The sun gear drives the planetary gears meshing with it to rotate. At this time, the clutch support disengages from the inner clutch ring, and the clutch support can rotate relative to the inner clutch ring, causing the planetary support to rotate as well. The planetary gears, while rotating on their own axes, also revolve around the sun, thus driving the planetary support to rotate. During the rotation of the planetary support, the clutch support drives the wheel to rotate. When the planetary carrier serves as the power output structure, the entire planetary gear output structure has a large reduction ratio, enabling it to output high torque and effectively meet the power demands of the hub motor on steep inclines. By switching between two power modes, the range requirements of the electric-assisted bicycle can be guaranteed. Furthermore, integrating the clutch bracket, clutch inner ring, and planetary assembly together results in a simple structure with a high degree of integration.

[0008] In some embodiments, the planetary support is provided with a boss, the boss is provided with a first positioning hole, the clutch support is provided with a second positioning hole, and the positioning member passes through the second positioning hole and connects with the first positioning hole to fix the clutch support to the planetary support.

[0009] In some specific embodiments, there are multiple bosses, and the multiple bosses are evenly spaced along the circumference of the sun gear.

[0010] In some embodiments, the planetary gear includes an integrally formed shaft portion and a gear portion, one end of the shaft portion being rotatably connected to the planetary carrier, and the other end of the shaft portion being rotatably connected to the clutch carrier.

[0011] In some specific embodiments, the planetary support has a first rotating hole, which is formed as a stepped hole. A first limiting sleeve is installed in the first rotating hole. The first limiting sleeve is sleeved on one end of the rotating shaft and abuts against the stepped surface of the stepped hole.

[0012] In some specific embodiments, the clutch bracket has a second rotating hole, which is formed as a stepped hole. A second limiting sleeve is installed in the second rotating hole. The second limiting sleeve is sleeved on the other end of the rotating shaft and abuts against the stepped surface of the stepped hole.

[0013] In some specific embodiments, the gear portion includes a large tooth portion and a small tooth portion, the large tooth portion meshing with the sun gear and the small tooth portion meshing with the internal gear ring.

[0014] In some embodiments, the planetary gear output structure of the electric-assisted vehicle further includes a first support bearing, the internal gear ring includes a gear ring groove and a receiving groove, the diameter of the gear ring groove is smaller than the receiving groove, the first support bearing is installed in the receiving groove and sleeved on the planetary support.

[0015] In some embodiments, the planetary gear output structure of the electric-assisted vehicle further includes a second support bearing, which is sleeved on the clutch bracket and mounted on the housing of the hub motor.

[0016] This utility model also discloses an electric-assisted bicycle, including a hub motor and the aforementioned planetary gear output structure of the electric-assisted bicycle. The planetary gear output structure of the electric-assisted bicycle is installed inside the hub motor, and the sun gear of the planetary gear output structure of the electric-assisted bicycle is driven and engaged with the rotor of the hub motor.

[0017] The beneficial effects of this electric-assisted bicycle are as follows: because the hub motor is equipped with the planetary gear output structure of the electric-assisted bicycle described above, the electric-assisted bicycle has better climbing ability and a longer range.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the planetary gear output structure of the electric-assisted bicycle according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the planetary gear output structure of the electric-assisted bicycle according to another embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional view of the planetary gear output structure of the electric-assisted bicycle according to an embodiment of the present invention;

[0022] Figure 4 This is an exploded view of the planetary gear output structure of the electric-assisted bicycle according to an embodiment of the present invention.

[0023] Figure 5 yes Figure 4 A schematic diagram of the structure in the second direction;

[0024] Figure 6 yes Figure 4A schematic diagram of the third direction of the structure shown.

[0025] Figure label:

[0026] 100, Internal gear ring; 110, Gear ring groove; 120, Receiving groove; 200, Planetary support; 210, Boss; 211, First positioning hole; 220, First rotating hole; 300, Planetary gear; 310, Rotating shaft; 320, Gear section; 321, Large gear section; 322, Small gear section; 400, Sun gear; 500, Clutch support; 510, Ratchet groove; 520, Second positioning hole; 530, Second rotating hole; 600, Clutch inner ring; 610, Ratchet; 620, Mating hole; 621, Keyway; 700, Positioning element; 800a, First limiting sleeve; 800b, Second limiting sleeve; 900a, First support bearing; 900b, Second support bearing. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] This utility model discloses a planetary gear output structure for an electric-assisted bicycle (hereinafter referred to as planetary gear output structure for ease of description), see reference Figures 1-3As shown, the planetary gear output structure includes an internal gear ring 100, a planetary carrier 200, multiple planetary gears 300, a sun gear 400, a clutch carrier 500, and a clutch inner ring 600. An internal gear ring 100 is used to connect to the housing of the hub motor of the electric bicycle. A planetary carrier 200 is installed inside the internal gear ring 100. Multiple planetary gears 300 are rotatably installed on the planetary carrier 200 and mesh with the internal gear ring 100 respectively. A sun gear 400 is used to connect to the rotor of the hub motor. The sun gear 400 is located radially inside the multiple planetary gears 300 and meshes with the multiple planetary gears 300. A clutch carrier 500 is connected to the planetary carrier 200 and is located on the side of the planetary gears 300 away from the planetary carrier 200. The clutch carrier 500 has a ratchet groove 510. A clutch inner ring 600 is installed inside the clutch carrier 500 and has ratchet teeth 610 that cooperate with the ratchet groove 510. The clutch inner ring 600 cooperates with the motor shaft of the hub motor.

[0031] It is understandable that, in actual operation, the planetary gear output structure of this embodiment has two power output modes. The first mode is that after the hub motor starts, it can drive the sun gear 400 to rotate, and the sun gear 400 can drive the planet gear 300 meshing with it to rotate. At this time, the clutch support 500 is engaged with the clutch inner ring 600. Since the clutch inner ring 600 is connected to the motor shaft of the hub motor, the clutch support 500 and the clutch inner ring 600 remain stationary, so that the planet support 200 is also stationary. The power input from the sun gear 400 can be output from the internal gear ring 100 to drive the hub motor housing to rotate, thereby driving the wheel to rotate. The second configuration involves the hub motor starting up, which drives the sun gear 400 to rotate. The sun gear 400 then drives the planetary gears 300 meshing with it to rotate. At this time, the clutch support 500 disengages from the clutch inner ring 600, allowing the clutch support 500 to rotate relative to the clutch inner ring 600, thus causing the planetary support 200 to rotate as well. The planetary gears 300, while rotating on their own axes, also revolve around the sun, driving the planetary support 200 to rotate. During the rotation of the planetary support 200, the clutch support 500 drives the wheel to rotate. When the planetary support 200 serves as the power output structure, the entire planetary gear output structure has a large reduction ratio, enabling it to output high torque, effectively meeting the power demands of the hub motor on steep slopes. By switching between the two power modes, the range requirements of the electric-assisted bicycle can be guaranteed. Furthermore, integrating the clutch support 500, the clutch inner ring 600, and the planetary assembly (i.e., the internal gear ring 100, the planetary support 200, multiple planetary gears 300, and the sun gear 400) together results in a simple structure with a high degree of integration.

[0032] Optionally, the clutch inner ring 600 has a mating hole 620, and a keyway 621 is provided on the peripheral wall of the mating hole 620. The clutch inner ring 600 is connected to the motor shaft of the hub motor through a connecting key.

[0033] Optionally, the outer circumference of the sun gear 400 is threaded and is threadedly connected to the rotor of the hub motor, which can effectively ensure the concentricity requirements of power transmission.

[0034] refer to Figures 4-6 As shown, the planetary carrier 200 has a boss 210 with a first positioning hole 211, and the clutch bracket 500 has a second positioning hole 520. A positioning element 700 passes through the second positioning hole 520 and connects to the first positioning hole 211 to fix the clutch bracket 500 to the planetary carrier 200. Understandably, in actual assembly, after installing the planetary gear 300 onto the planetary carrier 200, the clutch bracket 500 is installed on the side of the planetary gear 300 facing away from the planetary carrier 200, aligning the second positioning hole 520 with the first positioning hole 211. Then, the positioning element 700 passes through the second positioning hole 520 and connects to the first positioning hole 211 to complete the fixation of the clutch bracket 500 to the planetary carrier 200. This connection method is convenient to operate, has high connection strength, and helps improve the structural compactness of the entire planetary gear output structure. In this embodiment, the second positioning hole 520 is a smooth hole, the first positioning hole 211 is a threaded hole, and the positioning element 700 is a bolt. Of course, in other embodiments of this utility model, the positioning element 700 can also be a positioning pin, and the first positioning hole 211 and the second positioning hole 520 are both light holes.

[0035] Optionally, the boss 210 is integrally formed on the planetary carrier 200, thereby simplifying the manufacturing process of the planetary carrier 200 and helping to reduce the manufacturing cost of the entire planetary gear output structure.

[0036] Optionally, the boss 210 has a fan-shaped cross-section, and the planetary support 200 is usually a disc-shaped structure. The outer peripheral wall of the boss 210 is flush with the outer peripheral wall of the planetary support 200.

[0037] Optionally, there may be multiple bosses 210, which are evenly spaced along the circumference of the sun gear 400. It is understood that by using multiple bosses 210, the clutch support 500 and planetary support 200 can be fixed by multiple positioning elements 700 during actual assembly, thus improving the installation stability of the clutch support 500 and planetary support 200. In this embodiment, there are three bosses 210. Of course, in other embodiments of this invention, the number of bosses 210 may be two, four, or even more.

[0038] refer to Figures 4-6As shown, the planetary gear 300 includes an integrally formed shaft portion 310 and a gear portion 320. One end of the shaft portion 310 is rotatably connected to the planetary carrier 200, and the other end of the shaft portion 310 is rotatably connected to the clutch carrier 500. It is understood that the integrally formed shaft portion 310 and gear portion 320 of the planetary gear 300 simplifies assembly. In actual assembly, it is only necessary to insert both ends of the shaft portion 310 into the planetary carrier 200 and the clutch carrier 500 respectively, and then use the positioning component 700 to fix the planetary carrier 200 and the clutch carrier 500. The operation is very convenient.

[0039] Optional, see reference Figure 3 and Figure 5 As shown, the planetary support 200 has a first rotating hole 220, which is formed as a stepped hole. A first limiting sleeve 800a is installed inside the first rotating hole 220. The first limiting sleeve 800a is fitted onto one end of the rotating shaft 310 and abuts against the stepped surface of the stepped hole. It can be understood that, since the first rotating hole 220 is a stepped hole, in actual installation, the first limiting sleeve 800a is fitted onto one end of the rotating shaft 310, and then inserted into the first rotating hole 220, ensuring that the first limiting sleeve 800a abuts against the stepped surface of the stepped hole. This prevents the rotating shaft 310 from protruding from the planetary support 200 and avoids axial movement of the rotating shaft 310 relative to the planetary support 200, thereby improving the connection stability between the planetary gear 300 and the new support.

[0040] Alternatively, the first limiting sleeve 800a may be a lubricated bushing. The first limiting sleeve 800a can not only limit the movement but also lubricate the surface, thereby ensuring that the planetary gear 300 can rotate stably relative to the planetary support 200.

[0041] Optional, see reference Figure 3 and Figure 6 As shown, the clutch bracket 500 has a second rotating hole 530, which is formed as a stepped hole. A second limiting sleeve 800b is installed inside the second rotating hole 530. The second limiting sleeve 800b is fitted onto the other end of the rotating shaft 310 and abuts against the stepped surface of the stepped hole. It can be understood that, since the second rotating hole 530 is a stepped hole, in actual installation, the second limiting sleeve 800b is fitted onto one end of the rotating shaft 310, and then inserted into the second rotating hole 530, ensuring that the second limiting sleeve 800 abuts against the stepped surface of the stepped hole. This prevents the rotating shaft 310 from protruding from the clutch bracket 500 and avoids axial movement of the rotating shaft 310 relative to the clutch bracket 500, thereby improving the connection stability between the planetary gear 300 and the new bracket.

[0042] Alternatively, the second limiting sleeve 800b may be a lubricated bushing. The second limiting sleeve 800b serves both a limiting function and a lubricating function, thereby ensuring that the planetary gear 300 can rotate stably relative to the planetary support 200.

[0043] Optional, see reference Figure 6 As shown, the gear section 320 includes a large tooth section 321 and a small tooth section 322. The large tooth section 321 meshes with the sun gear 400, and the small tooth section 322 meshes with the internal gear ring 100. It can be understood that the gear section 320, including the large tooth section 321 and the small tooth section 322, makes the entire planetary gear 300 a double gear. This increases the speed ratio of the entire planetary gear output structure, allowing the hub motor to output greater torque when the electric-assisted bicycle is climbing hills, thus making it easier for the electric-assisted bicycle to climb hills.

[0044] refer to Figures 3-6 As shown, the planetary gear output structure also includes a first support bearing 900a. The internal gear ring 100 includes a gear ring groove 110 and a receiving groove 120. The diameter of the gear ring groove 110 is smaller than that of the receiving groove 120. The first support bearing 900a is installed in the receiving groove 120 and is sleeved on the planetary carrier 200. It can be understood that the first support bearing 900a is installed in the receiving groove 120 of the internal gear ring 100, and the bearing inner hole is mounted on the planetary carrier 200. This can ensure the coaxiality requirement of the internal gear ring 100 and the planetary carrier 200, reduce the friction between the internal gear ring 100 and the planetary carrier 200, reduce the wear of the planetary carrier 200 and the internal gear ring 100, and extend the service life of the planetary gear output structure.

[0045] refer to Figures 3-6 As shown, the planetary gear output structure also includes a second support bearing 900b, which is sleeved on the clutch bracket 500 and mounted on the housing of the hub motor. It can be understood that the second support bearing 900b, when mounted and fixed on the housing of the hub motor, together with the first support bearing 900a, ensures the concentricity requirements of the input and output ends of the planetary gear output structure, thus ensuring the operational reliability of the planetary gear output structure.

[0046] This utility model also discloses an electric-assisted bicycle, including a hub motor and the aforementioned planetary gear output structure. The planetary gear output structure is installed inside the hub motor, and the sun gear 400 of the planetary gear output structure is driven by the rotor of the hub motor. It is understood that because the hub motor is equipped with the aforementioned planetary gear output structure, the electric-assisted bicycle has better climbing ability and a longer range.

[0047] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A planetary gear output structure for an electric-assisted bicycle, characterized in that, include: An internal gear ring (100) is used to connect to the housing of the hub motor of an electric-assisted bicycle; Planetary support (200), the planetary support (200) is mounted inside the internal gear ring (100); A plurality of planetary gears (300) are rotatably mounted on the planetary support (200) and respectively mesh with the internal gear ring (100); A sun gear (400) is used to connect to the rotor of the hub motor. The sun gear (400) is located radially inside the plurality of planet gears (300) and meshes with the plurality of planet gears (300). A clutch support (500) is connected to the planetary support (200) and is located on the side of the planetary gear (300) away from the planetary support (200). The clutch support (500) has a ratchet groove (510). The clutch inner ring (600) is installed inside the clutch bracket (500) and has ratchet teeth (610) that cooperate with the ratchet groove (510). The clutch inner ring (600) cooperates with the motor shaft of the hub motor.

2. The planetary gear output structure of the electric-assisted bicycle according to claim 1, characterized in that, The planetary support (200) is provided with a boss (210), the boss (210) is provided with a first positioning hole (211), the clutch support (500) is provided with a second positioning hole (520), and the positioning member (700) passes through the second positioning hole (520) and connects with the first positioning hole (211) to fix the clutch support (500) to the planetary support (200).

3. The planetary gear output structure of the electric-assisted bicycle according to claim 2, characterized in that, There are multiple bosses (210), and the multiple bosses (210) are evenly spaced along the circumference of the sun gear (400).

4. The planetary gear output structure of the electric-assisted bicycle according to claim 1, characterized in that, The planetary gear (300) includes an integrally formed shaft portion (310) and a gear portion (320). One end of the shaft portion (310) is rotatably connected to the planetary carrier (200), and the other end of the shaft portion (310) is rotatably connected to the clutch carrier (500).

5. The planetary gear output structure of the electric-assisted bicycle according to claim 4, characterized in that, The planetary support (200) has a first rotating hole (220), which is formed as a stepped hole. A first limiting sleeve (800a) is installed in the first rotating hole (220). The first limiting sleeve (800a) is sleeved on one end of the rotating shaft (310) and abuts against the stepped surface of the stepped hole.

6. The planetary gear output structure of the electric-assisted bicycle according to claim 4, characterized in that, The clutch bracket (500) has a second rotating hole (530), which is formed as a stepped hole. A second limiting sleeve (800b) is installed in the second rotating hole (530). The second limiting sleeve (800b) is sleeved on the other end of the rotating shaft (310), and the second limiting sleeve (800b) abuts against the stepped surface of the stepped hole.

7. The planetary gear output structure of the electric-assisted bicycle according to claim 4, characterized in that, The gear section (320) includes a large tooth section (321) and a small tooth section (322), the large tooth section (321) meshing with the sun gear (400) and the small tooth section (322) meshing with the internal gear ring (100).

8. The planetary gear output structure of the electric-assisted bicycle according to claim 1, characterized in that, It also includes a first support bearing (900a), the internal gear ring (100) includes a gear ring groove (110) and a receiving groove (120), the diameter of the gear ring groove (110) is smaller than that of the receiving groove (120), the first support bearing (900a) is installed in the receiving groove (120) and sleeved on the planetary support (200).

9. The planetary gear output structure of the electric-assisted bicycle according to claim 1, characterized in that, It also includes a second support bearing (900b), which is sleeved on the clutch bracket (500) and mounted on the housing of the hub motor.

10. An electric-assisted bicycle, characterized in that, The electric bicycle includes a hub motor and a planetary gear output structure as described in any one of claims 1-9, wherein the planetary gear output structure of the electric bicycle is installed inside the hub motor, and the sun gear (400) of the planetary gear output structure of the electric bicycle is driven by the rotor of the hub motor.

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