WO2023108912A1

WO2023108912A1 - Transmission assembly, electric motor, and electric bicycle

Info

Publication number: WO2023108912A1
Application number: PCT/CN2022/079077
Authority: WO
Inventors: 彭浩宇
Original assignee: 广东威灵电机制造有限公司; 威灵（芜湖）电机制造有限公司
Priority date: 2021-12-16
Filing date: 2022-03-03
Publication date: 2023-06-22

Abstract

A transmission assembly, an electric motor, and an electric bicycle. The transmission assembly (1000) comprises a crankshaft (100), wherein a one-way clutch (200) and a cadence sensor (300) are arranged on the crankshaft (100), a magnetic ring (310) is arranged on a first outer ring (210) of the one-way clutch (200), and the first outer ring (210) is connected to the crankshaft (100), so that the magnetic ring (310) can rotate synchronously with the crankshaft (100); and a magnetic induction device (320) is fixedly mounted and is arranged spaced apart from the magnetic ring (310).

Description

Transmission components, motors and e-bikes

CROSS REFERENCE TO RELATED APPLICATIONS This application claims Application No. 202111546619.9, filed December 16, 2021, entitled "Transmission Components, Motors, and Electric Bicycles," and Application No. 202123194849.1, filed December 16, 2021, titled The priority of the Chinese patent application for "transmission assembly, motor and electric bicycle", the entire content of which is incorporated in this application by reference.

technical field

The present disclosure relates to the technical field related to electrical appliances, in particular to a transmission assembly, a motor and an electric bicycle.

Background technique

In electric bicycles, cadence sensors are usually used to collect the speed of human pedaling to accurately configure the output speed of the motor, so as to achieve the purpose of electric power assistance. In the data collection process of the cadence sensor, the accuracy of data collection is very important, which directly affects the output power of the configured motor and user experience. In the related art, the cadence sensor is integrally integrated on the crankshaft. Due to the small diameter of the crankshaft, the induction magnetic ring of the cadence sensor installed on the crankshaft has a small number of pole pairs arranged in the circumferential direction of the shaft, which cannot Achieve high precision and high resolution.

Contents of the invention

The present disclosure aims to solve one of the technical problems existing in the related art at least to a certain extent. For this reason, the present disclosure proposes a transmission assembly, which can increase the diameter of the magnetic ring, so that the magnetic ring has more pole pairs, and effectively improve detection accuracy and resolution.

The present disclosure also provides a motor and an electric bicycle including the above transmission assembly.

The transmission assembly according to the embodiment of the first aspect of the present disclosure includes:

crankshaft;

A one-way clutch, including a first inner ring and a first outer ring rotatably sleeved on the outside of the first inner ring, and the first outer ring is sleeved on the crankshaft;

The cadence sensor includes a magnetic ring and a magnetic induction device, the magnetic ring is arranged on the first outer ring, so that the magnetic ring and the crankshaft rotate synchronously, the position of the magnetic induction device is fixed and connected to the Magnetic ring spacing setting.

The transmission assembly according to the embodiment of the present disclosure has at least the following beneficial effects:

By setting the one-way clutch and the cadence sensor on the crankshaft, the crankshaft is used to connect the pedals, the magnetic ring is arranged on the first outer ring of the one-way clutch, and the first outer ring is connected with the crankshaft, so that the magnetic ring can It rotates synchronously with the crank shaft, and the magnetic induction device is fixedly installed and spaced apart from the magnetic ring. When the magnetic ring rotates with the crank shaft, the magnetic induction device can sense the magnetic field change of the magnetic ring, thereby collecting the cadence and direction data of human pedaling; The first outer ring is sleeved on the outside of the crankshaft, the diameter of the first outer ring is greater than the diameter of the crankshaft, and the installation of the magnetic ring on the first outer ring is beneficial to increase the diameter size, so that more magnetic rings can be arranged in the circumferential direction. Magnetic poles, more pole pairs, help to improve the accuracy and resolution of cadence and pedaling data collection, and then improve the control of the output speed of the motor, which is suitable for electric bicycles.

According to some embodiments of the present disclosure, the magnetic ring is sheathed on the outer wall of the first outer ring, and the outer wall of the first outer ring is provided with a mounting seat for fixing the magnetic ring, and the mounting seat It is arranged along the circumferential direction of the first outer ring.

According to some embodiments of the present disclosure, the mounting seat is made of plastic material, and both the magnetic ring and the first outer ring are fixedly connected to the mounting seat.

According to some embodiments of the present disclosure, the number of pole pairs of the magnetic ring is P, which satisfies P>30.

According to some embodiments of the present disclosure, the first outer ring is connected to the first inner ring through a ratchet structure.

According to some embodiments of the present disclosure, the first outer ring is connected to the crankshaft by a spline.

According to some embodiments of the present disclosure, the one-way clutch further includes a first washer and a first retaining ring, and the first washer and the first retaining ring are respectively arranged on the first inner ring along the The axial ends of the crankshaft.

According to some embodiments of the present disclosure, it also includes:

A collar is sleeved on the outside of the crankshaft, and the magnetic induction device is arranged on the collar and spaced apart from the magnetic ring along the axial direction of the crankshaft.

According to some embodiments of the present disclosure, it also includes:

The torque sensor includes a second inner ring and a second outer ring sleeved outside the second inner ring, the second outer ring is fixedly arranged relative to the second inner ring, and the second outer ring is used for detecting the torque transmitted by the second inner ring;

Wherein, the second inner ring is rotatably connected to the crankshaft and fixedly connected to the first inner ring.

According to some embodiments of the present disclosure, the first inner ring and the second inner ring are connected by splines.

According to some embodiments of the present disclosure, the second outer ring is integrally connected with the collar.

According to some embodiments of the present disclosure, it also includes:

The overrunning clutch includes a third inner ring sleeved on the crankshaft, a bearing is provided between the third inner ring and the crankshaft, and the third inner ring and the second inner ring are splined connect.

According to some embodiments of the present disclosure, the torque sensor further includes a second washer and a second retaining ring, and the second washer and the second retaining ring are used for positioning the crankshaft axially. Describe the second inner circle.

The motor according to the embodiment of the second aspect of the present disclosure includes the transmission assembly described in the embodiment of the first aspect above.

The motor adopts all the technical solutions of the transmission assembly of the above-mentioned embodiments, and therefore at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments.

The electric bicycle according to the embodiment of the third aspect of the present disclosure includes a mid-mounted motor, and the mid-mounted motor is the motor described in the embodiment of the second aspect above.

The electric bicycle according to the embodiment of the present disclosure has at least the following beneficial effects:

The electric bicycle adopts all the technical solutions of the motor of the above-mentioned embodiments, and therefore at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments.

Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.

Description of drawings

The above and/or additional aspects and advantages of the present disclosure will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

FIG. 1 is a schematic structural diagram of a transmission assembly according to an embodiment of the present disclosure;

Fig. 2 is a schematic diagram of the connection structure between a cadence sensor and a one-way clutch according to an embodiment of the present disclosure;

Fig. 3 is a schematic cross-sectional structure diagram of A-A direction in Fig. 1;

Fig. 4 is the sectional structure schematic diagram of B-B direction in Fig. 1;

5 is a schematic cross-sectional view of a mid-mounted motor according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of an enlarged structure at point C in FIG. 5 .

Reference signs:

crankshaft 100;

One-way clutch 200; first outer ring 210; shaft sleeve 211; tooth portion 212; first inner ring 220;

Cadence sensor 300; Magnetic ring 310; Mounting seat 311; Magnetic induction device 320;

bracket 400;

Torque sensor 500; second outer ring 510; second inner ring 520; second clip spring 521; second gasket 522;

The third inner ring 600; the bearing 610;

transmission assembly 1000;

The middle motor is 2000.

Detailed ways

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present disclosure and should not be construed as limiting the present disclosure.

In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms axial, radial, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore not be construed as limiting the present disclosure.

In the description of the present disclosure, if the first and second are described only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating The sequence of the indicated technical features.

In the description of the present disclosure, it should be noted that words such as setting, installation, and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present disclosure in combination with the specific content of the technical solution.

In the description of the present disclosure, descriptions of some embodiments, specific embodiments, etc. mean that specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same implementation or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The technical solutions of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the embodiments described below are some of the embodiments of the present disclosure, not all of them.

A transmission assembly 1000 according to an embodiment of the present disclosure is described with reference to FIGS. 1 to 4 . The transmission assembly 1000 is suitable for a motor of an electric bicycle. The transmission assembly 1000 will be described below with a specific example.

1 and 2, the transmission assembly 1000 provided by the embodiment includes a crankshaft 100 and a one-way clutch 200 disposed on the crankshaft 100, wherein the one-way clutch 200 includes a first inner ring 220 and a first outer ring 220. Ring 210, the first outer ring 210 is set on the outside of the first inner ring 220, the two ends of the crankshaft 100 along the axial direction are respectively connected to the pedals through cranks, the first outer ring 210 and the crankshaft 100 are connected by splines, the first outer The ring 210 can rotate together with the crankshaft 100 , and the one-way torque transmission is realized through the ratchet structure between the first outer ring 210 and the first inner ring 220 .

It can be understood that when manpower inputs power through the pedals, the crank shaft 100 is driven to rotate, and the crank shaft 100 can drive the first outer ring 210 to rotate. At this time, the first outer ring 210 can drive the first inner ring 220 to rotate. The inner ring 220 can be connected to the power output component, so as to transmit power to the power output component through the first inner ring 220 .

2, the transmission assembly 1000 of the embodiment also includes a cadence sensor 300, the cadence sensor 300 includes a magnetic ring 310 and a magnetic induction device 320, wherein the magnetic ring 310 is installed on the one-way clutch 200, and the magnetic induction device 320 is fixed Installed at a position corresponding to the magnetic ring 310 , the magnetic induction device 320 can detect the change of the magnetic field of the magnetic ring 310 . Specifically, the magnetic ring 310 is arranged on the first outer ring 210, and the magnetic ring 310 is ring-shaped as a whole and is fastened on the outside of the first outer ring 210, so that the magnetic ring 310 can rotate synchronously with the crankshaft 100, as shown in FIG. 2 The structure of the crankshaft 100 is omitted. The magnetic induction device 320 is a non-contact induction module, such as a Hall element. The magnetic induction device 320 and the magnetic ring 310 are arranged at intervals, so that no contact is required between the magnetic ring 310 and the magnetic induction device 320. When the magnetic ring 310 follows the first outer ring 210 When rotating, the magnetic induction device 320 can detect the change of the magnetic field of the magnetic ring 310, and the cadence data can be obtained according to the frequency of the change of the magnetic field, so as to realize the collection of human pedaling speed.

It can be understood that the magnetic ring 310 is provided with a plurality of magnetic poles, and the magnetic poles are distributed along the circumferential direction of the magnetic ring 310 to generate a magnetic field around the magnetic ring 310 , and the direction of the magnetic field will change when the magnetic ring 310 rotates. Since the magnetic ring 310 is linked with the first outer ring 210 and the crankshaft 100, when manpower inputs power through the crankshaft 100, the change of the magnetic field detected by the magnetic induction device 320 can be calculated to obtain the rotational speed of the magnetic ring 310. According to the rotational speed of the magnetic ring 310, it can be obtained The speed of human pedalling. The magnetic poles of the magnetic ring 310 are divided into N poles and S poles. Usually, the magnetic poles appear in pairs. The number of magnetic poles can also be understood as the number of pole pairs. Take the Hall element as an example. The Hall element is a magnetic sensor based on the Hall effect. According to the Hall effect, the magnetic field of the magnetic pole and its change can be detected. When the changing magnetic field passes through the Hall element, the Hall element can When the pulse signal is detected, the number of pulses sent per unit time can be measured according to the pulse signal sequence, so that the rotation speed of the magnetic ring 310 can be determined.

It should be noted that the crankshaft 100 can be rotated forward or reversely by human power through the pedal, because the one-way clutch 200 can only transmit power along one direction, wherein the crankshaft 100 drives the first outer ring 210 and the first inner ring The direction of rotation of the ring 220 can be understood as the forward direction. At this time, the power can be transmitted from the crankshaft 100 to the first outer ring 210 and the first inner ring 220 in sequence; No power transmission occurs between the inner rings 220 .

Referring to FIG. 2, it can be understood that the first outer ring 210 and the first inner ring 220 are sequentially arranged from the inside to the outside along the radial direction of the crankshaft 100, because the diameter of the first outer ring 210 and the diameter of the first inner ring 220 The diameters are all larger than the diameter of the crankshaft 100 , and the diameter of the first outer ring 210 is the largest. The magnetic ring 310 is sleeved on the outside of the first outer ring 210, and the diameter of the magnetic ring 310 is larger than that of the crankshaft 100. Compared with the installation structure in which the magnetic ring 310 is directly sleeved on the crankshaft 100, the magnetic ring 310 has a larger space for arrangement The magnetic poles, that is to say, the magnetic ring 310 can be configured with more magnetic poles along the circumferential direction, and the number of pole pairs is more. The more the number of pole pairs, the more the resolution of the magnetic induction device 320 to the change of the magnetic field is effectively improved, and the detection accuracy is also higher. This is beneficial to improve the accuracy and resolution of cadence and cadence data collection, and the accuracy of motor output speed control according to cadence and cadence data is also higher, so that the electric bicycle has better output power and user experience.

In the embodiment, a collar can be provided on the outside of the crankshaft 100. The collar is placed on the outside of the crankshaft 100 and the collar cannot be rotated. Installing the magnetic induction device 320 on the collar can fix the position of the magnetic induction device 320. For example, the collar can be used as the casing of the transmission assembly 1000. When the transmission assembly 1000 is assembled to the motor, the transmission assembly 1000 can be fixedly connected to the motor through the collar, so that the position of the magnetic induction device 320 will not change, and the magnetic induction device 320 will move along the axial direction. The magnetic induction device 320 is spaced apart from the magnetic ring 310, and a certain gap is maintained between the magnetic induction device 320 and the magnetic ring 310. The magnetic induction device 320 can quickly respond to changes in the magnetic field and realize non-contact measurement.

It should be noted that, in some embodiments, the magnetic ring 310 can be installed on the end face of the first outer ring 210 axially close to the magnetic induction device 320, and there is a certain gap between the magnetic induction device 320 and the magnetic ring 310, so that the magnetic induction device 320 is able to detect the magnetic field of the magnetic poles and its changes. The magnetic ring 310 can be fixed on the end surface of the first outer ring 210 by bonding. It can be understood that the diameter of the magnetic ring 310 is equivalent to the diameter of the first outer ring 210, so that the magnetic ring 310 also has a larger space for arranging the magnetic poles. The specific structure of this embodiment is not shown in the drawings. For specific working principles, refer to the above Description of Examples.

1 and 2, in some embodiments, a mounting seat 311 is provided on the outer wall of the first outer ring 210, and the mounting seat 311 extends along the circumferential direction of the first outer ring 210 to form a ring shape, and the mounting seat 311 The mounting seat 311 is matched with the magnetic ring 310 so that the magnetic ring 310 can be fixed on the mounting seat 311 , thereby achieving the purpose of fixing the magnetic ring 310 .

It can be understood that the diameter of the first outer ring 210 is larger than the diameter of the collar, and the mounting seat 311 is fixed on the first outer ring 210 near the end of the collar, and the outer wall of the collar is provided with a magnetic induction device 320. The bracket 400 , the magnetic ring 310 is fixed on the mounting base 311 , the magnetic induction device 320 is fixed on the bracket 400 , and after being installed in place, the magnetic ring 310 and the magnetic induction device 320 can correspond to each other along the axial direction. Wherein, the mounting seat 311 can be fixed on the first outer ring 210 by means of threaded connection, bonding, etc., so that the magnetic ring 310 is not easily detached from the first outer ring 210, and the structure is stable and reliable. In the embodiment, the mounting seat 311 is made of plastic material. When assembling, the magnetic ring 310 is first put on the mounting seat 311 to form a combination, and then the combination is placed on the first outer ring 210 through an interference fit, so as to realize Quick install magnetic ring 310.

It can be understood that the larger the diameter of the first outer ring 210, the larger the diameter of the magnetic ring 310, and the number of magnetic poles distributed along the circumferential direction of the magnetic ring 310 can be set more. In the case of meeting the actual installation requirements, the embodiment The number of magnetic poles of the middle magnetic ring 310 can be set to be greater than 30, that is to say, the number of pole pairs of the magnetic ring 310 is P, satisfying P>30, which is much larger than the configurable number of pole pairs when the magnetic ring 310 is directly sleeved on the crankshaft 100 , greatly improving the accuracy and resolution of the cadence sensor to collect the cadence data, and the design is more reasonable. For example, the number of pole pairs of the magnetic ring 310 in the embodiment can be set to P=40, and the magnetic poles are evenly distributed along the circumference of the magnetic ring 310. When the magnetic ring 310 rotates with the first outer ring 210 and the crankshaft 100, the detection accuracy is high. requirements. It can be understood that the number of pole pairs P of the magnetic ring 310 can also be 50, 60, 80, and so on.

1 and 3, in some embodiments, a torque sensor 500 is installed on the crankshaft 100, the torque sensor 500 includes a second outer ring 510 and a second inner ring 520, wherein the second outer ring 510 is sleeved on the outside of the second inner ring 520 , the second outer ring 510 is non-rotatable, and the second inner ring 520 is rotatable, that is, the second outer ring 510 is fixed relative to the second inner ring 520 . There is a certain gap radially between the second outer ring 510 and the second inner ring 520 , so that the second inner ring 520 can rotate inside the second outer ring 510 . When the second inner ring 520 rotates relative to the second outer ring 510, the second outer ring 510 can detect the torque transmitted by the second inner ring 520, thereby realizing the collection of torque data.

3 is a schematic cross-sectional view of the transmission assembly 1000 along the axial direction. It can be understood that the second inner ring 520 is sleeved on the outside of the crankshaft 100, and the second inner ring 520 is not fixedly connected to the crankshaft 100, that is, Relative rotation is possible between the crankshaft 100 and the second inner ring 520, the second inner ring 520 will not follow the rotation of the crankshaft 100, no power transmission will occur between the crankshaft 100 and the second inner ring 520, for example, the crankshaft 100 and the second inner ring 520 can Bearings are arranged between the shaft 100 and the second inner ring 520 , and the movement between the crankshaft 100 and the second inner ring 520 does not interfere with each other. Moreover, the second inner ring 520 is fixedly connected to the first inner ring 220, so that the second inner ring 520 and the first inner ring 220 can cooperate to form a linkage structure, so that power can be transmitted.

It can be understood that when the crankshaft 100 is driven to rotate by human power, the power is transmitted through the first outer ring 210, the first inner ring 220 and the second inner ring 520 in sequence, so that the magnetic induction device 320 can detect the change of the magnetic field of the magnetic ring 310 and collect pedals. Frequency of pedaling data, while the second inner ring 520 rotates relative to the second outer ring 510, can collect torque data. In this way, the transmission assembly 1000 is applied in the electric bicycle, and the speed and torque output by the motor are accurately configured by collecting the speed and torque of human pedaling, so as to achieve the purpose of electric power assistance.

It should be noted that, referring to FIG. 3 , in the embodiment, the second outer ring 510 and the collar are combined to form an integral structure, the magnetic induction device 320 is installed outside the second outer ring 510, and the collar can be used to install the magnetic induction device 320, It can also be used as the outer ring of the torque sensor 500 , which is beneficial to simplify the overall structure of the transmission assembly 1000 and is more practical and reliable, so that the cadence sensor 300 and the torque sensor 500 can be assembled on the crankshaft 100 .

It should be noted that the torque is transmitted in one direction through the ratchet structure between the first outer ring 210 and the first inner ring 220. When the first outer ring 210 and the first inner ring 220 are disengaged in reverse, the power of the crankshaft 100 will not It will be reversely transmitted to the second inner ring 520, so that the second inner ring 520 has no torque input and no deformation, so that the pedaling data can be collected.

Referring to FIG. 3 , one end of the second inner ring 520 extends to the inner side of the first inner ring 220 , and the second inner ring 520 , the first inner ring 220 , the first The outer ring 210 and the magnetic ring 310, wherein, the first inner ring 220 and the second inner ring 520 are connected by splines to realize the power transmission between the first inner ring 220 and the second inner ring 520; The ring 220 is connected to the first outer ring 210 through a ratchet structure, and the power driven by manpower can transmit power in the direction of the first outer ring 210, the first inner ring 220 and the second inner ring 520 in sequence, and the power cannot be transferred from the first inner ring 210 to the second inner ring 520. The ring 220 is transmitted to the first outer ring 210 to realize one-way power transmission.

Referring to Figure 4, Figure 4 is a schematic cross-sectional view of the transmission assembly 1000 along the radial direction, the first inner ring 220 may be a ratchet, the outer side of the first inner ring 220 is provided with a pawl 223, and the inner wall of the first outer ring 210 is provided with The tooth part 212 corresponding to the ratchet 223 forms a ratchet structure through the ratchet of the first inner ring 220, and the ratchet 223 cooperates with the tooth part 212 of the first outer ring 210, and power can be transmitted from the first outer ring 210 to the first inner ring. ring 220, but cannot pass from the first inner ring 220 to the first outer ring 210 in the opposite direction.

It should be noted that, as shown in FIG. 3 , the end of the first outer ring 210 axially away from the torque sensor 500 is provided with a bushing 211 , the bushing 211 extends radially and is connected with the crankshaft 100 , and the bushing 211 is connected to the crankshaft 100 . The shafts 100 are connected by splines, so that power can be transmitted between the first outer ring 210 and the crank shaft 100, and the structure is stable and reliable.

Referring to FIG. 3 , along the axial direction of the crankshaft 100 , a first gasket 221 is provided between the first inner ring 220 and the sleeve 211 , and a gasket 221 is provided between the first inner ring 220 and the second outer ring 510 . The first snap ring 222 axially positions the first inner ring 220 through the first washer 221 and the first snap ring 222 . As shown in FIG. 3 , considering that one end of the second inner ring 520 is connected to the first inner ring 220 , the ends of the first inner ring 220 and the second inner ring 520 can be positioned simultaneously through the first spacer 221 .

Referring to Fig. 3, an overrunning clutch can also be set on the crankshaft 100, and the overrunning clutch is used to connect the motor and output power. Specifically, the overrunning clutch includes a third outer ring (not shown in the drawings) and a third inner ring 600, the third outer ring is connected with the motor through the transmission structure, the power is transmitted in one direction between the third outer ring and the third inner ring 600, the third inner ring 600 is sleeved on the crankshaft 100, and the third inner ring 600 A bearing 610 is provided between the crankshaft 100 so that the movement between the crankshaft 100 and the third inner ring 600 does not interfere with each other. In addition, the third inner ring 600 is connected to the second inner ring 520 through a spline, so that bidirectional transmission of power between the third inner ring 600 and the second inner ring 520 can be realized.

Referring to FIG. 3 , along the axial direction of the crankshaft 100 , the one-way clutch 200 is disposed close to one end of the crankshaft 100 , and the overrunning clutch is disposed close to the other end of the crankshaft 100 . When human power is input through pedals, the crankshaft 100 is driven to rotate, and the power is sequentially transmitted along the first outer ring 210 , the first inner ring 220 , the second inner ring 520 and the third inner ring 600 , and then passes through the third inner ring 600 Output power. At this time, speed and torque data can be collected. The power will not be transmitted to the third outer ring and will not affect the structure of the motor.

When the motor is used to input power, the power of the motor is transmitted to the third inner ring 600 along the third outer ring, and then the power is output through the third inner ring 600. Since the third inner ring 600 is connected with the second inner ring 520, the motor's The power can drive the second inner ring 520 to rotate at the same time, so that the torque data output by the motor can be collected. Of course, the human power and the motor can input power at the same time, and the two powers are output through the third inner ring 600. According to the collected speed and torque, the speed and torque output by the motor can be precisely configured to achieve a better boosting effect.

It should be noted that the third inner ring 600 can be directly connected to the power output component, for example, the third inner ring 600 is connected to the sprocket, and the power is transmitted to the chain through the sprocket, so as to drive the electric bicycle to run.

Referring to Fig. 3, a second gasket 522 and a second snap ring 521 are arranged on the outside of the second inner ring 520, and the second inner ring 520 can be positioned axially by the second snap ring 521, and the second snap ring 521 is located in the gap between the second outer ring 510 and the third outer ring, and at the same time, the second gasket 522 is arranged on the side of the second retaining ring 521 close to the second outer ring 510. The second gasket 522 is to prevent The wear pad can avoid the friction generated between the second clamp spring 521 and the second outer ring 510 through the wear pad, so as to improve the stability of positioning.

Referring to FIG. 5 and FIG. 6 , the motor of the embodiment of the present disclosure is described, and the motor is suitable for an electric bicycle, specifically, a central motor 2000 of the electric bicycle.

Referring to Fig. 5 and Fig. 6, Fig. 5 is a schematic cross-sectional view of the central motor 2000, the transmission assembly 1000 and the motor in the above embodiment are assembled into an integral structure, and the drive shaft of the motor can be connected with the overrunning clutch through the transmission structure. Since the magnetic ring 310 is installed on the first outer ring 210 of the one-way clutch 200, the diameter of the magnetic ring 310 is larger than the diameter of the crankshaft 100, and the magnetic ring 310 can be arranged with more magnetic poles along the circumferential direction, and the number of pole pairs is larger. It is beneficial to improve the accuracy and resolution of cadence data collection, and the motor can control the output speed more accurately according to the cadence data, so that the electric bicycle has better output power and user experience.

Embodiments of the present disclosure also provide an electric bicycle (not shown in the drawings), which can also be understood as an electric bicycle, and the electric bicycle uses the motor of the above-mentioned embodiment. Since the electric bicycle adopts all the technical solutions of the motor of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be repeated here.

The embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings, but the present disclosure is not limited to the above embodiments, and various modifications can be made without departing from the purpose of the present disclosure within the scope of knowledge of those skilled in the art. Variety.

Claims

Transmission components, including:

crankshaft;

A one-way clutch, including a first inner ring and a first outer ring rotatably sleeved on the outside of the first inner ring, and the first outer ring is sleeved on the crankshaft;

The cadence sensor includes a magnetic ring and a magnetic induction device, the magnetic ring is arranged on the first outer ring, so that the magnetic ring and the crankshaft rotate synchronously, the position of the magnetic induction device is fixed and connected to the Magnetic ring spacing setting.
The transmission assembly according to claim 1, wherein the magnetic ring is sleeved on the outer wall of the first outer ring, and the outer wall of the first outer ring is provided with a mounting seat for fixing the magnetic ring, The mounting seat is arranged along the circumferential direction of the first outer ring.
The transmission assembly according to claim 2, wherein the mounting seat is made of plastic material, and both the magnetic ring and the first outer ring are fixedly connected to the mounting seat.
The transmission assembly according to claim 1, wherein the number of pole pairs of the magnetic ring is P, satisfying P>30.
The transmission assembly according to claim 1, wherein the first outer ring is connected to the first inner ring through a ratchet structure.
The transmission assembly of claim 1, wherein the first outer ring is splined to the crankshaft.
The transmission assembly according to claim 1, wherein the one-way clutch further includes a first washer and a first clip ring, and the first washer and the first clip ring are respectively arranged in the first inner rings along both ends of the crankshaft in the axial direction.
The transmission assembly according to claim 1, further comprising:

A collar is sleeved on the outside of the crankshaft, and the magnetic induction device is arranged on the collar and spaced apart from the magnetic ring along the axial direction of the crankshaft.
The transmission assembly of claim 8, further comprising:

The torque sensor includes a second inner ring and a second outer ring sleeved outside the second inner ring, the second outer ring is fixedly arranged relative to the second inner ring, and the second outer ring is used for detecting the torque transmitted by the second inner ring;

Wherein, the second inner ring is rotatably connected to the crankshaft and fixedly connected to the first inner ring.
The transmission assembly according to claim 9, wherein the first inner ring and the second inner ring are connected by splines.
The transmission assembly according to claim 9, wherein said second outer ring is integrally connected with said collar.
The transmission assembly of claim 9, further comprising:

The overrunning clutch includes a third inner ring sleeved on the crankshaft, a bearing is provided between the third inner ring and the crankshaft, and the third inner ring and the second inner ring are splined connect.
The transmission assembly according to claim 9, wherein said torque sensor further comprises a second washer and a second retaining ring, said second washer and said second retaining ring are used for to position the second inner ring.
A motor comprising the transmission assembly according to any one of claims 1 to 13.
The electric bicycle comprises a central motor, wherein the central motor is the motor according to claim 14.