Dual-clutch mid-mounted motor

Abstract

The utility model discloses a dual-clutch mid-mounted motor, which relates to the field of power-assisted riding vehicles. The technical solution includes a main shaft, a rotor, a planetary gear assembly, an output shaft sleeve, and a pedal clutch assembly; the planetary gear assembly includes a clutch planetary frame, the clutch planetary frame is sleeved on the outer wall of the output shaft sleeve, and the pedal clutch assembly is embedded in the inner wall of the output shaft sleeve; in the power-assisted mode, the torque of the rotor is transmitted to the output shaft sleeve through the planetary gear assembly, and the pedal clutch assembly is in an idling state; in the pedal mode, the torque of the main shaft is transmitted to the output shaft sleeve through the pedal clutch assembly, and the clutch planetary frame is in an idling state. The utility model arranges the clutch planetary frame and the pedal clutch assembly on the outer side and the inner side of the output shaft sleeve respectively to form a dual-clutch structure, which has a simple structure, is easy to assemble, has good stability, and has a low cost. In addition, in the pedal mode, the torque transmission path is short, and the pedal feedback is rapid, which is conducive to optimizing the riding experience.

Description

Technical Field

[0001] The utility model relates to the field of power-assisted riding vehicles, and more specifically, to a dual-clutch mid-mounted motor. Background Art

[0002] The existing Chinese patent with authorization announcement number CN217496448U discloses a mid-mounted motor for a power-assisted bicycle based on a double planetary gear train transmission, which includes a five-way shaft, a first inner gear ring, a power transmission sleeve, an output sleeve, two planetary gear trains, a first overrunning clutch, a motor output unit and a second overrunning clutch.

[0003] The above patent uses a dual clutch and a dual planetary gear train to achieve transmission, but the structure is relatively complex, resulting in high production costs, and is prone to failure, which affects the service life. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a dual-clutch mid-mounted motor, which arranges the clutch planetary carrier and the pedal clutch assembly on the outside and inside of the output shaft sleeve respectively to form a dual-clutch structure. This structure is simple, easy to assemble, stable, and low in cost. In addition, the torque transmission path is short in the pedal mode, and the pedal feedback is rapid, which is conducive to optimizing the riding experience.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A dual-clutch mid-mounted motor comprises a main shaft, a rotor, a planetary gear assembly connected to the rotor, an output shaft sleeve connected to the planetary gear assembly, and a pedal clutch assembly connected to the main shaft;

[0007] The planetary gear assembly includes a clutch planet carrier, the clutch planet carrier is sleeved on the outer side wall of the output shaft sleeve, and the pedal clutch assembly is embedded in the inner side wall of the output shaft sleeve;

[0008] Among them, in the power-assist mode, the torque of the rotor is transmitted to the output shaft sleeve through the planetary gear assembly, and the pedal clutch assembly is in an idling state; in the pedal mode, the torque of the main shaft is transmitted to the output shaft sleeve through the pedal clutch assembly, and the clutch planetary carrier is in an idling state.

[0009] Furthermore, the clutch planet carrier comprises a planet carrier outer ring and a planet carrier inner ring, and the planet carrier inner ring is fixedly sleeved on the outer side wall of the output shaft sleeve.

[0010] Furthermore, the planet carrier inner ring and the output shaft sleeve are integrally formed.

[0011] Furthermore, the pedal clutch assembly comprises a clutch inner ring and a clutch outer ring, the clutch outer ring is fixedly embedded in the inner side wall of the output shaft sleeve, and the clutch inner ring is linked with the main shaft along the circumferential direction.

[0012] Furthermore, a keyway assembly is provided between the clutch inner ring and the main shaft.

[0013] Furthermore, a retaining ring in contact with the end of the inner ring of the clutch is sleeved on the main shaft, a baffle in contact with the end of the outer ring of the clutch is provided on the inner side wall of the output shaft sleeve, and the retaining ring and the baffle are respectively located at two ends of the pedal clutch assembly.

[0014] Furthermore, the inner end of the output shaft sleeve is connected to the clutch planetary carrier, and the baffle is arranged at the outer end of the output shaft sleeve; the outer end surface of the baffle is provided with an output gear.

[0015] Furthermore, the pedal clutch assembly includes a needle roller clutch assembly.

[0016] Furthermore, the planetary gear assembly also includes a sun gear, planetary gears and planetary shafts. The sun gear is provided with an end plate, and the end plate is provided with fasteners connected to the rotor.

[0017] Furthermore, a bearing is provided between the planetary gear and the planetary shaft.

[0018] In summary, the utility model has the following beneficial effects:

[0019] 1. The clutch planetary carrier and pedal clutch assembly are arranged on the outside and inside of the output shaft sleeve respectively to form a dual-clutch structure. This structure is simple, easy to assemble, stable, and low in cost. In addition, the torque transmission path is short in pedal mode, and the pedal feedback is rapid, which is conducive to optimizing the riding experience.

[0020] 2. When pedaling, no back electromotive force is generated, which can protect the motor and controller, while reducing riding resistance, saving the rider's physical energy and optimizing the riding experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The structure of the dual-clutch mid-mounted motor in the embodiment is shown in FIG. Figure 1 ;

[0022] Figure 2 The structure of the dual-clutch mid-mounted motor in the embodiment is shown in FIG. Figure 2 .

[0023] In the figure: 1, main shaft; 2, rotor; 31, sun gear; 32, planetary gear; 33, ring gear; 34, planetary shaft; 35, clutch planet carrier; 4, output shaft sleeve; 41, output gear; 5, pedal clutch assembly. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention. Example

[0026] A dual-clutch mid-mounted motor, referring to Figure 1 and Figure 2 , which includes a main shaft 1, a rotor 2, a planetary gear assembly, an output shaft sleeve 4 and a pedal clutch assembly 5; the planetary gear assembly includes a sun gear 31, multiple planetary gears 32, a planetary shaft 34, a clutch planetary carrier 35 and a ring gear 33; wherein, an end plate is provided on the sun gear 31, and a fastening bolt connected to the rotor 2 is passed through the end plate, so that the sun gear 31 is fixedly connected to the rotor 2; the clutch planetary carrier 35 includes a planetary carrier outer ring, a planetary carrier inner ring and a planetary carrier clutch arranged between the planetary carrier outer ring and the planetary carrier inner ring; the planetary shaft 34 is passed through the planetary carrier outer ring, the planetary wheel 32 is sleeved on the planetary shaft 34, and a bearing is arranged between the planetary wheel 32 and the planetary shaft 34; the ring gear 33 is connected to the wheel hub so as to be fixed.

[0027] Reference Figure 1 and Figure 2 The clutch planetary carrier 35 is sleeved on the outer wall of the output shaft sleeve 4, specifically, the inner ring of the planetary carrier is fixedly sleeved on the inner end of the outer wall of the output shaft sleeve 4; preferably, the inner ring of the planetary carrier is integrally formed with the output shaft sleeve 4, so as to reduce the number of parts and facilitate assembly; the pedal clutch assembly 5 is embedded in the inner wall of the output shaft sleeve 4, specifically, the pedal clutch assembly 5 includes a clutch inner ring and a clutch outer ring, the clutch outer ring is fixedly embedded in the inner wall of the output shaft sleeve 4, and the clutch inner ring and the main shaft 1 are circumferentially linked through a keyway assembly; preferably, in this embodiment, the pedal clutch assembly 5 is a needle roller clutch assembly, which can optimize the radial size, and has low noise during idling, and can quickly switch from the idling state to the transmission state, thereby optimizing the riding experience; of course, in other optional embodiments, the pedal clutch assembly can also adopt other clutch assemblies, which are not limited here.

[0028] Reference Figure 1 and Figure 2A clamping ring in contact with the end of the inner ring of the clutch is sleeved on the main shaft 1, and a baffle in contact with the end of the outer ring of the clutch is arranged on the outer end of the inner wall of the output shaft sleeve 4. The clamping ring and the baffle are respectively located at the two ends of the pedal clutch assembly 5, thereby realizing axial limitation and facilitating assembly; an output gear 41 is arranged on the outer end surface of the baffle, and the output gear 41 is used to connect with the chainring; specifically, the chainring is sleeved on the output gear 41, thereby realizing torque output; the output gear 41 is connected with the chainring, which has the advantage of good transmission stability.

[0029] In the power-assist mode, the torque of the rotor 2 is transmitted to the output shaft sleeve 4 through the planetary gear assembly to realize power output; the ring gear 33 is fixed, the sun gear 31 is active, and the clutch planetary carrier 35 is passive, then the rotor 2 and the output shaft sleeve 4 have the same rotation direction; at this time, the pedal clutch assembly 5 is in an idling state, and the torque of the output shaft sleeve 4 cannot be transmitted to the main shaft 1, and will not drive the main shaft 1 to rotate, thereby optimizing the riding experience.

[0030] In pedaling mode, the pedal drives the main shaft 1 to rotate, and the torque of the main shaft 1 is transmitted to the output shaft sleeve 4 through the pedal clutch assembly 5 to achieve power output; at this time, the clutch planetary carrier 35 is in an idling state, and the torque of the output shaft sleeve 4 cannot be transmitted to the outer ring of the planetary carrier, and also cannot be transmitted to the rotor 2; in this way, when pedaling, no back electromotive force is generated, thereby protecting the motor and the controller, while reducing riding resistance, saving the rider's physical energy, and optimizing the riding experience.

[0031] In this embodiment, the clutch planetary carrier 35 and the pedal clutch assembly 5 are respectively arranged on the outer side and the inner side of the output shaft sleeve 4 to form a dual-clutch structure. This structure is simple, easy to assemble, has good stability, and low cost. In addition, in the pedal mode, the torque transmission path is short and the pedal feedback is rapid, which is conducive to optimizing the riding experience.

Claims

1. A dual-clutch mid-mounted motor, characterized in that: It includes a main shaft, a rotor, a planetary gear assembly connected to the rotor, an output shaft sleeve connected to the planetary gear assembly, and a pedal clutch assembly connected to the main shaft; The planetary gear assembly includes a clutch planet carrier, the clutch planet carrier is sleeved on the outer side wall of the output shaft sleeve, and the pedal clutch assembly is embedded in the inner side wall of the output shaft sleeve; Among them, in the power-assist mode, the torque of the rotor is transmitted to the output shaft sleeve through the planetary gear assembly, and the pedal clutch assembly is in an idling state; in the pedal mode, the torque of the main shaft is transmitted to the output shaft sleeve through the pedal clutch assembly, and the clutch planetary carrier is in an idling state.

2. The dual-clutch mid-mounted motor according to claim 1, characterized in that: The clutch planet carrier comprises a planet carrier outer ring and a planet carrier inner ring, and the planet carrier inner ring is fixedly sleeved on the outer side wall of the output shaft sleeve.

3. The dual-clutch mid-mounted motor according to claim 2, characterized in that: The planet carrier inner ring and the output shaft sleeve are integrally formed.

4. The dual-clutch mid-mounted motor according to claim 1, characterized in that: The pedal clutch assembly comprises a clutch inner ring and a clutch outer ring. The clutch outer ring is fixedly embedded in the inner side wall of the output shaft sleeve, and the clutch inner ring is linked with the main shaft along the circumferential direction.

5. The dual-clutch mid-mounted motor according to claim 4, characterized in that: A keyway assembly is arranged between the clutch inner ring and the main shaft.

6. The dual-clutch mid-mounted motor according to claim 4, characterized in that: The main shaft is sleeved with a clamping ring in contact with the end of the inner ring of the clutch, the inner side wall of the output shaft sleeve is provided with a baffle in contact with the end of the outer ring of the clutch, and the clamping ring and the baffle are respectively located at two ends of the pedal clutch assembly.

7. The dual-clutch mid-mounted motor according to claim 6, characterized in that: The inner end of the output shaft sleeve is connected to the clutch planetary frame, and the baffle is arranged on the outer end of the output shaft sleeve; the outer end surface of the baffle is provided with an output gear.

8. The dual-clutch mid-mounted motor according to claim 1, characterized in that: The pedal clutch assembly includes a needle roller clutch assembly.

9. The dual-clutch mid-mounted motor according to claim 1, characterized in that: The planetary gear assembly further includes a sun gear, planetary gears and planetary shafts. The sun gear is provided with an end plate, and the end plate is provided with fasteners connected to the rotor.

10. The dual-clutch mid-mounted motor according to claim 9, characterized in that: A bearing is arranged between the planetary gear and the planetary shaft.

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