Hub motor integrated with inner transmission and electric power-assisted bicycle

Abstract

The utility model provides a hub motor integrated with an internal transmission and an electric power-assisted bicycle. The hub motor comprises a hub and a main shaft. The clutch is connected to the inner side of the first end cover, the clutch is connected with an inner gear ring, the inner gear ring is meshed with and separated from the first end cover through the clutch, and therefore the clutch function of the first end cover and the reduction gearbox is achieved. The machine core comprises a stator assembly, a stator support, a rotor assembly and a stator insulation shield, the stator insulation shield is connected to the side, away from the reduction gearbox, of the stator support, and the rotor assembly is in driving connection with the reduction gearbox through a center gear. The variable speed control box is connected to the stator insulation shield and electrically connected with the mechanical gearbox, and the mechanical gearbox is connected to the main shaft and connected with the hub through the transmission end cover; the first end cover and the transmission end cover are connected to the two sides of the hub respectively. The mounting base of the transmission does not need to be supported by an independent shell structure and can be directly combined with an electric power module structure, and therefore the whole structure can be more compact.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a hub motor with an integrated internal gearbox and an electric-assisted bicycle. Background Technology

[0002] Patent document CN222742858U discloses a hub motor with an integrated internal gearbox, including a shaft, motor core, hub, gearbox, drive wheel, left end cover, and right end cover. A partition plate is provided inside the hub, dividing it into a left compartment and a right compartment. A connecting hole is provided on the partition plate, through which the shaft passes and is rotatably connected to the partition plate. The motor core is mounted on the shaft located in the left compartment and connected to the hub. The gearbox is mounted on the shaft located in the right compartment and connected to the hub. Most existing hub motors with integrated internal gearboxes for electric-assist bicycles, regardless of whether the gearbox uses a centrifugal or electric shifting principle, combine the electric assist module and the gearbox module as independent components into an integrated internal gearbox hub motor. Integrated internal gearbox designs are mostly independent, parallel, and stacked designs. In electric shifting, which requires control, the electric assist harness and gearbox harness often use separate outgoing lines on both sides or separate Bluetooth transmission methods.

[0003] The above design has low space utilization, complex structure, not compact enough, heavy weight, and can only make the gear opening relatively large, which limits the applicable vehicle models. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a hub motor with an integrated internal gearbox and an electric-assist bicycle.

[0005] According to the present invention, a hub motor with an integrated internal gearbox includes: a hub, a main shaft, and, arranged sequentially on the main shaft, a first end cover, a clutch, a reduction gearbox, a mechanism, and a gearbox;

[0006] The clutch is connected to the inner side of the first end cover, and an internal gear ring is connected to the clutch, which meshes with the gearbox.

[0007] The mechanism includes a stator assembly, a stator support, a rotor assembly, and a stator insulating cover. The stator assembly is connected to the main shaft via the stator support. The stator insulating cover is connected to the side of the stator support away from the gearbox. The rotor assembly is drivenly connected to the gearbox.

[0008] The transmission includes a transmission control box and a mechanical gearbox. The transmission control box is connected to the stator insulating cover and meshes with the mechanical gearbox. The mechanical gearbox is connected to the main shaft and is connected to the wheel hub through a transmission end cover.

[0009] The first end cap and the gearbox end cap are respectively connected to both sides of the wheel hub.

[0010] Furthermore, the first end cap and the flange of the clutch are connected by screws;

[0011] Alternatively, the external disc brake and the flange of the clutch are simultaneously connected to both sides of the clutch by screws.

[0012] Furthermore, the mechanical gearbox includes a gear-adjusting sector gear that meshes with the control output gear of the transmission control box.

[0013] Furthermore, the stator assembly is electrically connected to the PCBA, and the power and signal harnesses of the speed control box are connected to the plug-in connectors of the PCBA through integrated connectors, with the wires exiting through an integrated harness.

[0014] Furthermore, a cable outlet channel is provided within a section of the main shaft, through which the integrated cable harness exits from one end of the main shaft.

[0015] Furthermore, the gearbox includes a planetary assembly and a central gear, the central gear being connected to the rotor assembly of the mechanism and meshing with the planetary assembly.

[0016] Furthermore, the planetary assembly includes a planetary gear and a planetary carrier, the planetary gear being connected to the planetary carrier.

[0017] Furthermore, it also includes a drive wheel connected to the main shaft, which obtains driving force from the pedal via a chain or belt.

[0018] An electric-assisted bicycle according to the present invention includes a hub motor with an integrated internal gearbox.

[0019] Furthermore, the hub motor of the integrated internal gearbox is fixed to the rear fork of the frame via the main shaft.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The hub motor of this utility model, which integrates the internal transmission, breaks the boundary between the independent placement of the electric power steering module and the transmission module by integrating the transmission internally. It achieves structural design fusion, and the mounting base of the transmission module does not require a separate shell structure for support. It can be directly combined with the electric power steering module structure, thereby making the overall structure more compact. Attached Figure Description

[0022] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0023] Figure 1 This is an exploded view of the present invention;

[0024] Figure 2 This is a cross-sectional view of the present invention;

[0025] Figure 3 This is a cross-sectional view of the mechanical gearbox of this utility model;

[0026] Figure 4 This is a cross-sectional view of the speed control box of this utility model;

[0027] Figure 5 This is a sectional view of the first end cover and the clutch;

[0028] Figure 6 This is a cross-sectional view of the movement and gearbox;

[0029] Figure 7 A sectional view with the main axis as the axis;

[0030] In the picture:

[0031] 1-Gearbox; 2-Hub; 3-Stator support; 4-PCBA; 5-Stator assembly; 6-Planetary gear; 7-First end cover; 8-Internal gear ring; 9-Clutch; 10-Planetary support; 11-Center gear; 12-Rotor assembly; 13-Main shaft; 14-Stator insulation cover; 15-Integrated wiring harness; 16-Mechanical gearbox; 17-Gearbox control box; 18-Drive wheel; 19-Gearbox end cover; 20-Gear adjustment sector gear; 21-Control output gear. Detailed Implementation

[0032] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0033] like Figure 1and Figure 2 As shown, the present invention provides a hub motor with an integrated internal gearbox, comprising: a hub 2, a main shaft 13, and the following components arranged sequentially on the main shaft 13: a first end cover 7, a clutch 9, a reduction gearbox, a mechanism, and a gearbox 1.

[0034] like Figure 5 As shown, the clutch 9 is connected to the inner side of the first end cover 7, and an internal gear ring 8 is connected to the clutch 9, enabling it to engage and disengage with the reduction gearbox. In terms of overall layout, the first end cover 7, clutch 9, and internal gear ring 8 are integrated into a single unit, and the flanges of the first end cover 7 and clutch 9 can be connected together with screws. The outer side of the first end cover 7 can be used to mount a disc brake, using the same screws for fixing, thus saving internal space. The integrated assembly of the clutch 9 and the first end cover 7 makes the clutch placement more stable, which is more conducive to the clutch function, while also making the structure more compact and reducing wasted space.

[0035] The mechanism includes a stator assembly 5, a stator support 3, a rotor assembly 12, and a stator insulating cover 14. The stator assembly 5 is connected to the main shaft 13 via the stator support 3. The stator insulating cover 14 is connected to the side of the stator support 3 away from the gearbox. The rotor assembly 12 is connected to the gearbox via a central gear drive.

[0036] like Figure 4 , Figure 6 As shown, the transmission 1 includes a transmission control box 17, a mechanical gearbox 16, and a transmission end cover 19. The transmission control box 17 is connected to the stator insulation cover 14 and is electrically connected to the mechanical gearbox 16. The mechanical gearbox 16 is connected to the main shaft 13 and is drivenly connected to the transmission end cover 19. The transmission control box 17 is connected to the stator insulation cover 14, which not only serves as a protection to reduce the wear material generated by the planetary gears 6 and the transmission 1 during use from entering the stator assembly 5, thereby avoiding safety risks and reducing the life of the motor, but also serves as the mounting base for the transmission 1, ensuring the normal operation of its transmission function. The whole machine is relatively compact, with more reasonable space utilization, and there are no restrictions when adjusting the gear position, making its application scenarios more extensive. The first end cover 7 and the transmission end cover 19 are respectively connected to both sides of the hub 2.

[0037] The mechanical gearbox 16 includes a gear-adjusting sector gear 20 and a control output gear meshing with the transmission control box 17. The stator assembly is electrically connected to the PCBA4, and the power and signal harnesses of the transmission control box 17 are connected to the PCBA4's plug-in connectors via integrated connectors, exiting through an integrated harness 15. In the prior art, the separate exits of the electric assist harness and the transmission harness from opposite sides cause problems during installation and use, hindering signal transmission and feedback, resulting in differences in signal accuracy, impeding centralized control, and causing poor coordination between the electric assist system and the transmission system in different riding scenarios. Figure 7 As shown, a cable outlet channel is provided within a section of the main shaft 13, through which the integrated cable harness 15 exits from one end of the main shaft 13. This reduces the amount of wire used, resulting in more stable signal transmission and feedback, and stronger collaborative operation between the electric assist system and the transmission system in different riding scenarios. It eliminates the need for holes at both ends of the main shaft 13; a cable outlet hole in one section of the main shaft 13 is sufficient to meet the cable requirements. This simplifies the manufacturing process of the main shaft 13, saving time and costs, and also reduces the number of holes drilled, thereby ensuring the strength of the main shaft and the overall stability of the internal derailleur hub motor.

[0038] The gearbox includes a planetary assembly and a central gear 11. The central gear 11 is connected to the rotor assembly 12 of the movement and meshes with the planetary assembly. The internal gear ring 8 on the clutch 9 can engage and disengage with the first end cover 7 under the drive of the clutch 9, thereby realizing the disengagement function of the first end cover 7 and the gearbox. The planetary assembly includes a planetary gear 6 and a planetary carrier 10. The planetary gear 6 is connected to the planetary carrier 10.

[0039] The hub motor also includes a drive wheel 18 connected to the main shaft 13, which obtains driving force from the pedals via a chain or belt. The rider's pedaling force is transmitted to the gearbox end cap 19 via the gearbox 1. The gearbox end cap 19 is connected to the hub 2, and the hub 2 outputs the combined force of the electric assist and the pedaling force after gear shifting. The rider's cadence and speed signals are processed by the controller to generate corresponding control signals. These control signals are transmitted to the PCBA4 via the integrated wiring harness 15, and then to the gearbox control box 17. The gearbox control box 17 performs corresponding actions based on the received signals, transmitting them through the control output gear 21. The control output gear 21 meshes with the gear shifting sector gear 20 of the mechanical gearbox 16, putting the gearbox 1 in the corresponding gear.

[0040] The hub motor with integrated internal gearbox provided by this utility model can be applied to electric-assisted bicycles. The hub motor with integrated internal gearbox is fixed to the rear fork of the frame via a main shaft 13.

[0041] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, 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 application.

[0042] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A hub motor with an integrated internal gearbox, characterized in that, include: The hub (2), the main shaft (13), and the following components arranged sequentially on the main shaft (13): the first end cover (7), the clutch (9), the gearbox, the mechanism and the transmission (1); The clutch (9) is connected to the inside of the first end cover (7), and an internal gear ring (8) is connected to the clutch (9), which meshes with the gearbox; The mechanism includes a stator assembly (5), a stator support (3), a rotor assembly (12), and a stator insulating cover (14). The stator assembly (5) is connected to the main shaft (13) via the stator support (3). The stator insulating cover (14) is connected to the side of the stator support (3) away from the gearbox. The rotor assembly (12) is driven to the gearbox. The transmission (1) includes a transmission control box (17) and a mechanical gearbox (16). The transmission control box (17) is connected to the stator insulation cover (14) and meshes with the mechanical gearbox (16). The mechanical gearbox (16) is connected to the main shaft (13). The mechanical gearbox (16) is connected to the wheel hub (2) through the transmission end cover (19). The first end cap (7) and the gearbox end cap (19) are respectively connected to both sides of the wheel hub.

2. The hub motor with integrated internal gearbox according to claim 1, characterized in that, The flanges of the first end cap (7) and the clutch (9) are connected by screws; Alternatively, the external disc brake and the flange of the clutch (9) are simultaneously connected to both sides of the clutch (9) by screws.

3. The hub motor with integrated internal gearbox according to claim 1, characterized in that, The mechanical gearbox (16) includes a gear-adjusting sector gear (20) and a control output gear of the gearbox (17) meshing.

4. The hub motor with integrated internal gearbox according to claim 1, characterized in that, The stator assembly is electrically connected to the PCBA (4), and the power and signal harnesses of the speed control box (17) are connected to the PCBA (4) through the lead-out integrated connectors and the wires are output through the integrated harness (15).

5. The hub motor with integrated internal gearbox according to claim 4, characterized in that, A wire outlet channel is provided in a section of the main shaft (13), and the integrated wire harness (15) exits from one end of the main shaft (13) through the wire outlet channel.

6. The hub motor with integrated internal gearbox according to claim 1, characterized in that, The gearbox includes a planetary assembly and a central gear (11), which is connected to the rotor assembly (12) of the movement and meshes with the planetary assembly.

7. The hub motor with integrated internal gearbox according to claim 6, characterized in that, The planetary assembly includes a planetary gear (6) and a planetary carrier (10), the planetary gear (6) being connected to the planetary carrier (10).

8. The hub motor with integrated internal gearbox according to claim 1, characterized in that, It also includes a drive wheel (18) connected to the main shaft (13) to obtain driving force from the pedal via a chain or belt.

9. An electric-assisted bicycle, characterized in that, Including the hub motor with an integrated internal transmission as described in any one of claims 1-8.

10. The electric-assisted bicycle according to claim 9, characterized in that, The hub motor of the integrated internal gearbox is fixed to the rear fork of the frame via the main shaft (13).

Images