Electronic transmission and riding apparatus

Abstract

An electronic transmission and a riding apparatus. The electronic transmission comprises a base member (1), a driving unit (2), a linkage mechanism (3) and a guide chain member (4), wherein the base member (1) comprises a first base shell (11) of an integrated structure, an inner mounting portion (111) is provided on an inner side of the first base shell (11), and an outer mounting portion (112) is provided on an outer side of the first base shell; the driving unit (2) comprises an electric motor (21), a gear assembly (22), and an output shaft (23) which are arranged in the first base shell (11), the gear assembly (22) being connected to the inner mounting portion (111); the linkage mechanism (3) is connected to the output shaft (23); and the guide chain member (4) is connected to the linkage mechanism (3).

Description

Electronic transmission and riding equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 16, 2024, with application number CN202410061930.1 and invention name “Electronic Transmission and Cycling Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of transmissions, and in particular to an electronic transmission; the present application also relates to a riding device comprising the electronic transmission. Background Art

[0003] A bicycle transmission performs a gear shifting operation by switching a chain between a plurality of adjacent sprockets of a bicycle sprocket assembly. Since the plurality of sprockets have different sizes, the bicycle can achieve the effect of changing gears by the cooperation between the chain and the different sprockets.

[0004] An electronic shifter is generally constructed as follows: a base member is mounted to a bicycle frame, and a chain guide member for guiding the chain is movably connected to the base member via a linkage member. Driven by a drive motor, the chain guide member moves the chain guide assembly between the sprockets of the sprocket assembly, shifting the chain from an initial sprocket to a target sprocket. The drive motor then reduces and increases the torque output by the torque reduction gearbox.

[0005] In the Chinese invention patent with publication number CN113859421B, entitled "Bicycle derailleur, bicycle gear structure, bicycle motor unit and front derailleur", a bicycle derailleur is disclosed, which includes a base member and a linkage member. A motor and a gear structure are installed in the base member, as well as a first support member, a second support member, a third support member, a fourth support member and a fifth support member for installing the gear structure. The structure is complex, the number of parts is large, and there are problems such as cumbersome assembly process and high manufacturing cost. Summary of the Invention

[0006] In order to solve the problems existing in the prior art, the present application provides an electronic transmission and a riding device.

[0007] According to a first aspect of the present application, there is provided an electronic transmission, comprising:

[0008] The base member includes a first base shell of an integral structure, wherein an inner mounting portion is provided on an inner side of the first base shell and an outer mounting portion is provided on an outer side of the first base shell;

[0009] a drive unit comprising a motor, a gear assembly, and an output shaft disposed within the first base housing, the gear assembly being transmission-connected between the motor and the output shaft, and the gear assembly being connected to the inner mounting portion;

[0010] a linkage mechanism connected to the output shaft;

[0011] A chain guide component is connected to the linkage mechanism.

[0012] In one embodiment of the present application, the base component also includes a second base shell, which is fixedly connected to the first base shell. The drive unit also includes a PCB board assembly and a connector arranged in the second base shell, and the motor and the connector are respectively electrically connected to the PCB board assembly.

[0013] In one embodiment of the present application, a bracket is connected to the first base shell, the motor, the gear assembly and the output shaft are connected to the bracket, and the gear assembly is connected between the bracket and the inner mounting portion.

[0014] In one embodiment of the present application, the gear assembly includes a gear shaft connected between the bracket and the inner mounting portion, and the drive unit also includes an encoder for detecting the angular displacement of the gear shaft, and the encoder is arranged on the PCB board assembly, and the PCB board assembly is close to the bracket.

[0015] In one embodiment of the present application, the encoder includes a magnetic element and a magnetically sensitive element. The magnetic element is arranged on a side of the bracket close to the PCB board assembly and is connected to the gear shaft. The magnetic element is configured to generate a changing magnetic field as the gear shaft rotates. The magnetically sensitive element is arranged on the PCB board assembly and close to the magnetic element.

[0016] In one embodiment of the present application, a sleeve for mounting the connector is further provided in the second base shell, and a wiring port that cooperates with the bottom end of the sleeve is provided at the bottom end of the second base shell.

[0017] In one embodiment of the present application, one end of the output shaft extends out of the first base shell, and the other end extends out of the second base shell; the linkage mechanism includes a first connecting rod and a second connecting rod that are detachably fixedly connected, the first connecting rod is connected to one end of the output shaft, and the second connecting rod is connected to the other end of the output shaft, and a circumferential positioning structure is provided between the first connecting rod or the second connecting rod and the output shaft.

[0018] In one embodiment of the present application, a first structural groove is provided on the outer side of the first base shell for allowing one end of the output shaft to pass through, and a second structural groove is provided on the outer side of the second base shell for allowing the other end of the output shaft to pass through. The end of the first connecting rod connected to the output shaft is engaged in the first structural groove, and the end of the second connecting rod connected to the output shaft is engaged in the second structural groove.

[0019] In one embodiment of the present application, the outer sides of the first base shell and the second base shell are configured with concave evacuation portions, and the first connecting rod and the second connecting rod are configured to be able to rotate to cooperate with the evacuation portions under the drive of the output shaft.

[0020] In one embodiment of the present application, a connected upper chamber and a lower chamber are constructed in the first base shell, and the lower chamber is narrower than the upper chamber; the gear assembly and the output shaft are arranged in the upper chamber, and one end of the motor is arranged in the upper chamber, and the other end is arranged in the lower chamber.

[0021] In one embodiment of the present application, the gear assembly and the output shaft are connected through a transmission member, and the transmission member includes a gear part that cooperates with the gear assembly, and a fixed sleeve fixedly connected to the output shaft; two limiting parts are provided on the inner side of the first base shell, and the two limiting parts are respectively arranged on opposite sides of the gear part to limit the swing angle of the gear part.

[0022] In one embodiment of the present application, a front end surface of the first base shell is provided with an air guide groove, and the air guide groove extends from an end of the first base shell away from the chain guide member to an end of the first base shell close to the chain guide member.

[0023] In one embodiment of the present application, the linkage mechanism also includes an auxiliary connecting rod movably connected between the first base shell and the chain guide member, one end of the auxiliary connecting rod is hinged to the first base shell through a second rotating shaft, and the external mounting portion is provided with a baffle extending to block the end of the second rotating shaft.

[0024] According to a second aspect of the present application, a riding device is further provided, comprising a frame and the above-mentioned electronic transmission, wherein the electronic transmission is mounted on the frame.

[0025] One beneficial effect of the present application is that the electronic transmission installs a drive unit in the base component, the drive unit includes a motor and a gear assembly for transmitting torque, the gear assembly drives the linkage mechanism to rotate through the transmission shaft, and the linkage mechanism in turn drives the chain guide component to move to achieve gear shifting operations. The first base shell of the base component is an integrated structure, the inner mounting portion of the first base shell is used to install the gear assembly of the drive unit, and the outer mounting portion is used to connect to the frame. Compared with the gear box structure in the existing electronic transmission, some parts for installing the gear assembly can be eliminated, the structure of the base component is simplified, which is conducive to reducing the weight and volume of the electronic transmission, and can also simplify the assembly process of the electronic transmission, which is conducive to reducing manufacturing costs.

[0026] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0028] FIG1 is a front view of an electronic transmission provided by one embodiment of the present application;

[0029] FIG2 is a top view of an electronic transmission provided in one embodiment of the present application;

[0030] FIG3 is an exploded view of a base component of an electronic transmission provided in one embodiment of the present application;

[0031] FIG4 is a schematic diagram of the inner structure of a first base housing of an electronic transmission provided in one embodiment of the present application;

[0032] FIG5 is a schematic diagram of a first base shell portion of a base member of an electronic transmission provided by an embodiment of the present application;

[0033] FIG6 is an exploded view of a bracket and a drive unit portion of an electronic transmission provided in one embodiment of the present application;

[0034] FIG7 is a side view of a partial structure of an electronic transmission provided by an embodiment of the present application;

[0035] FIG8 is a schematic diagram of a second base shell portion of a base member of an electronic transmission provided by an embodiment of the present application;

[0036] FIG9 is a cross-sectional view of an electronic transmission provided in one embodiment of the present application;

[0037] FIG10 is an exploded view of a second base housing and a sleeve of an electronic transmission provided in one embodiment of the present application;

[0038] FIG11 is a cross-sectional view of a base member of an electronic transmission provided in one embodiment of the present application;

[0039] FIG12 is an exploded view of a first connecting rod and a second connecting rod of an electronic transmission provided in one embodiment of the present application;

[0040] FIG13 is an isometric view of a first connecting rod and a second connecting rod of an electronic transmission provided in one embodiment of the present application;

[0041] FIG14 is an isometric view of a base member of an electronic transmission according to an embodiment of the present application;

[0042] FIG15 is a second isometric view of the base component of the electronic transmission provided in one embodiment of the present application;

[0043] FIG16 is a rear view of the electronic transmission provided in one embodiment of the present application.

[0044] The one-to-one correspondence between the component names and reference numerals in Figures 1 to 16 is as follows:

[0045] 1. Base member; 11. First base shell; 12. Second base shell; 13. Bracket; 14. Sleeve; 15. First bearing; 16. Second bearing; 101. Giving portion; 110. Connecting column; 111. Inner mounting portion; 112. Outer mounting portion; 113. First through hole; 114. First structural groove; 115. Position limiting portion; 116. Coupling portion; 117. Baffle; 118. Air guide groove; 121. Wiring port; 122. Structural hole; 123. Second through hole; 124. Second structural groove; 131. First connecting portion; 132. Second connecting portion; 133. Third connecting portion; 1101. Upper chamber; 1102. Lower chamber; 1121. Mounting surface;

[0046] 2. Drive unit; 21. Motor; 22. Gear assembly; 23. Output shaft; 24. Transmission member; 25. PCB assembly; 26. Connector; 27. Encoder; 220. Gear; 221. Gear shaft; 222. Worm gear; 223. Worm; 231. Knurling; 241. Gear unit; 242. Fixed bushing; 271. Magnetic element; 272. Magnetic sensitive element; 273. Mounting base;

[0047] 3. Linkage mechanism; 31. First connecting rod; 32. Second connecting rod; 33. Connecting rod fastener; 34. Auxiliary connecting rod; 35. First rotating shaft; 36. Second rotating shaft; 37. Third rotating shaft; 38. Elastic element; 311. First connecting rod connecting portion; 321. Second connecting rod connecting portion; 341. Auxiliary rod; 342. Connecting rod; 312. Positioning hole; 322. Positioning post;

[0048] 4. Chain guide; 5. Mounting screws; 6. Spacers; 7. Adjusting screws; 8. Frame; 9. Mounting accessories. DETAILED DESCRIPTION

[0049] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements and numerical values ​​of the components and steps described in these embodiments do not limit the scope of the present application.

[0050] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0051] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0052] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0053] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the prerequisite for each other's existence.

[0054] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0055] As used herein, unless otherwise specified, "plurality" means two or more.

[0056] One embodiment of the present application provides an electronic shifter mounted on the frame of a cycling device. As shown in Figures 1, 2, and 3, the electronic shifter comprises a base member 1, a drive unit 2, a linkage mechanism 3, and a chain guide 4. The base member 1 is secured to the frame 8, the drive unit 2 is mounted on the base member 1, and the chain guide 4 is connected to the drive unit 2 via the linkage mechanism 3. The drive unit 2 drives the linkage mechanism 3 to move the chain guide 4.

[0057] A sprocket assembly and a chain are mounted on a frame 8 of the cycling device. The sprocket assembly includes multiple sprockets of different sizes. A chain guide 4 guides the chain, allowing it to engage with the sprockets of the sprocket assembly. Driven by a drive unit 2, the chain guide 4 moves, shifting the chain from an initial sprocket to a target sprocket, thereby shifting the chain and sprockets.

[0058] The electronic derailleur can be controlled by an operating device on the riding device. The drive unit 2 can be configured to drive the linkage mechanism 3 in response to operation from the operating device, thereby causing the chain guide 4 to guide the chain. The operating device can be a shifter, knob, or other device mounted on the handlebars. In this embodiment, the electronic derailleur is described as a front derailleur on a bicycle. However, the structure of the electronic derailleur can also be applied to rear derailleurs or other derailleurs.

[0059] As shown in Figures 3 and 4, the base member 1 includes a first base shell 11 of a one-piece structure. An inner mounting portion 111 is provided on the inner side of the first base shell 11, and an outer mounting portion 112 is provided on the outer side of the first base shell 11. The main body of the first base shell 11 is a shell having an inner cavity. The inner mounting portion 111, the outer mounting portion 112, and the main body of the first base shell 11 form a one-piece structure. The inner mounting portion 111 is used to mount the drive unit 2, and the outer mounting portion 112 is used to connect to the vehicle frame.

[0060] As shown in Figures 2 and 3 , external mounting portion 112 is provided with screw holes for receiving mounting screws 5. External mounting portion 112 is directly or indirectly fixed to vehicle frame 8 via mounting screws 5. Mounting accessories 9, such as clamps and connectors, are mounted on vehicle frame 8. External mounting portion 112 is secured to mounting accessories 9 via mounting screws 5.

[0061] Furthermore, outer mounting portion 112 includes a mounting surface 1121 adapted to mate with mounting accessory 9. Mounting surface 1121 may be a curved surface. Screw holes for attaching mounting screws 5 are provided on mounting surface 1121. A spacer 6 may be positioned between mounting screws 5 and the mounting accessory. During assembly, mounting screws 5 pass through spacer 6 and mounting accessory 9, and then connect to the screw holes on mounting surface 1121. Mounting accessory 9 is clamped between mounting surface 1121 and spacer 6. The surface of spacer 6 that mates with mounting accessory 9 is configured to mate with mounting accessory 9.

[0062] As shown in Figures 1 and 2 , an adjustment screw 7 is connected to the outer mounting portion 112, and a screw hole for mounting the adjustment screw is provided on the outer mounting portion 112. One end of the adjustment screw 7 can abut against the frame 8, and by rotating the adjustment screw 7, the angle between the electronic transmission and the frame 8 can be adjusted.

[0063] As shown in Figures 3 and 4, the drive unit 2 includes a motor 21, a gear assembly 22, and an output shaft 23, housed within the first base housing 11. The gear assembly 22 is drivingly connected between the motor 21 and the output shaft 23, and is also connected to the inner mounting portion 111 of the base member 1. The torque output by the motor 21 is transmitted to the output shaft 23 via the gear assembly 22. The output shaft 23 rotates about its own axis under the influence of the torque. The torque output by the output shaft 23 drives the linkage mechanism 3, which in turn drives the chain guide 4.

[0064] The gear assembly 22 is used to transmit torque and can also be used to change the speed or direction of torque transmission. The gear assembly 22 can be a reduction gear assembly, used to reduce the speed and increase the torque output by the motor 21 before transmitting it to the output shaft 23. The motor 21 can be a stepper motor, servo motor, or other type of motor. The motor 21 can rotate forward or reverse to output torque in both directions. The gear assembly 22 transmits this torque to the output shaft 23, causing it to rotate forward or reverse, thereby driving the chain guide member 4 to oscillate back and forth.

[0065] Compared to existing electronic transmissions that connect a reduction gearbox to the motor output, the electronic transmission in this embodiment uses a gear assembly 22 to transmit the torque output by the motor 21. The gear assembly 22 is directly mounted on the inner mounting portion 111 of the first base housing 11. The integrated structure of the first base housing 11 eliminates some parts required for mounting the gear assembly 22, simplifying the structure of the base member 1. This helps reduce the weight and size of the electronic transmission, simplifies the assembly process, and reduces manufacturing costs.

[0066] In some embodiments of the present application, as shown in Figures 3 and 4, a bracket 13 is connected to the inside of the first base shell 11, and the gear assembly 22 can be installed on the bracket 13. The gear assembly 22 is connected between the bracket 13 and the inner mounting portion 111 of the first base shell 11 to ensure the installation stability of the gear assembly 22. The motor 21 can also be installed on the bracket 13. The output shaft 23 can also be installed on the bracket 13. An outwardly extending connecting column 110 can be provided on the inner side of the first base shell 11. The connecting column 110 and the main body of the first base shell 11 are an integrated structure. The bracket 13 is fixedly connected to the connecting column 110 by screws, so that there is a gap between the bracket 13 and the inner mounting portion 111 of the first base shell 11 for installing the gear assembly 22.

[0067] In a specific embodiment shown in Figures 5 and 6, a bracket 13 is connected to the first base housing 11, and a motor 21, a gear assembly 22, and an output shaft 23 are respectively mounted on the bracket 13. The bracket 13 is mounted to the first base housing 11 using fasteners such as screws. The motor 21 can be mounted to the bracket 13 using fasteners such as screws, and the gear assembly 22 and the output shaft 23 are rotatably connected to the bracket 13. Specifically, the gear assembly 22 includes at least one gear 220. The gear assembly 22 includes at least one gear shaft 221. The gear 220 is mounted to the bracket 13 and the inner mounting portion 111 of the first base housing 11 via the gear shaft 221. The inner mounting portion 111 includes mounting holes or shaft seats for mounting the gear shafts 221. The number, position, size, and other dimensions of these mounting holes or shaft seats correspond to the number, position, size, and other dimensions of the gear shafts 221.

[0068] 5 and 6 , the bracket 13 is provided with a first connecting portion 131, to which the motor 21 is fixedly connected. The first connecting portion 131 may be provided with a screw hole for mounting the motor 21. The bracket 13 is provided with a second connecting portion 132, to which the gear shaft 221 of the gear assembly 22 is rotatably connected. The bracket 13 is provided with a third connecting portion 133, to which the output shaft 23 is rotatably connected. The output shaft 23 can rotate about its own axis. The bracket 13 can be a one-piece structure, that is, the first connecting portion 131, the second connecting portion 132, and the third connecting portion 133 are integrally formed.

[0069] The end of the gear shaft 221 can be rotatably connected to the inner mounting portion 111 or the second connecting portion 132 by means of sliding friction or by providing a bearing seat, etc. The third connecting portion 133 and the output shaft 23 can be rotatably connected by means of sliding friction or by providing a bearing seat, etc.

[0070] Installing the motor 21 , the gear assembly 22 and the output shaft 23 on the bracket 13 can ensure the installation stability of the three, avoid providing more installation structures on the first base shell 11 , and prevent the structure of the first base shell 11 from being too complicated.

[0071] In some embodiments of the present application, as shown in Figures 6 and 7 , the linkage mechanism 3 further includes a transmission member 24, which connects the gear assembly 22 to the output shaft 23. The transmission member 24 includes a gear portion 241 and a fixed sleeve 242. The gear portion 241 mates with the gear assembly 22, and the fixed sleeve 242 is fixedly connected to the output shaft 23. The gear portion 241 and the fixed sleeve 242 of the transmission member 24 are fixedly connected together by welding, integral molding, or other methods.

[0072] Specifically, gear portion 241 is equipped with a tooth-groove structure that meshes with gear 220. Rotation of gear 220 causes gear portion 241 to swing, and fixed sleeve 242 causes output shaft 23 to rotate about its own axis. Fixed sleeve 242 fits over the outer surface of output shaft 23. The fixed sleeve 242 and output shaft 23 are engaged by a circumferential positioning structure, which can be a non-circular surface, to prevent relative rotation between the fixed sleeve 242 and output shaft 23.

[0073] As shown in FIG7 , two limiting portions 115 are provided on the inner side of the first base shell 11. The limiting portions 115 are disposed on opposite sides of the gear portion 241 of the transmission member 24 to limit the swing angle of the gear portion 241 and prevent the gear portion 241 from disengaging from the gear 220. The two limiting portions 115 are integrally formed with the main body of the first base shell 11.

[0074] When the electronic shifter is installed on a riding device, the forward direction of the riding device is defined as the front, the direction opposite the forward direction is defined as the rear, the direction facing the ground of the riding device is defined as the downward direction, and the direction opposite the downward direction is defined as the upward direction. The forward end of the electronic shifter is referred to as the front end, the rearward end as the rear end, the upward end as the top end, and the downward end as the bottom end. One side of the base member 1 is close to the main body of the riding device, and the other side is away from the main body of the riding device. The chain guide member 4 is configured to be movable from the side of the base member 1 away from the main body of the riding device to the bottom of the base member 1.

[0075] In some embodiments of the present application, as shown in Figures 4 and 5 , the first base shell 11 is constructed with an upper chamber 1101 and a lower chamber 1102 that are connected, and the lower chamber 1102 is narrower than the upper chamber 1101. Referring to the perspective of Figure 7 , the lower chamber 1102 is located below the upper chamber 1101, so that the bottom of the first base shell 11 is configured as a concave structure. When the chain guide member 4 moves to the bottom of the first base shell 11, the first base shell 11 can make way for the linkage mechanism 3.

[0076] The gear assembly 22 and output shaft 23 are located in the upper chamber 1101, with the output shaft 23 positioned closer to the side of the first base housing 11 facing away from the riding device body, thereby being closer to the chain guide 4. One end of the motor 2 is located in the upper chamber 1101, and the other end is located in the lower chamber 1102. The structural design of the interior of the first base housing 11, as well as the arrangement of the motor 21, gear assembly 22, and output shaft 23 within the first base housing 11, contribute to a compact overall structure of the base member 1 and reduce its size.

[0077] The output end of motor 21 is located in upper chamber 1101 and connected to gear assembly 22. Lower chamber 1102 provides mounting space for the other end of motor 21. The output end of motor 21 extends vertically, while output shaft 23 extends horizontally. Gear assembly 22 includes a worm gear 222 and a worm 223. The torque output by motor 21 is redirected by worm gear 222 and worm 223 before being transmitted to output shaft 23.

[0078] In detail, as shown in Figures 6 and 7, the output end of the motor 21 is connected to a worm 223. One end of the worm 223 is coaxially connected to the output end of the motor 21, and the other end is rotatably connected to the bracket 13. The worm wheel 222 is rotatably connected between the bracket 13 and the inner mounting portion 111 via a gear shaft 221 and cooperates with the worm 223. The rotation axis direction of the worm wheel 222 is parallel to the axis direction of the output shaft 23. The worm wheel 222 and the output shaft 23 can be connected by at least one gear 220, and the rotation axis direction of each gear 220 is also parallel to the axis direction of the output shaft 23.

[0079] In some embodiments of the present application, as shown in Figures 3, 8, and 9, the base member 1 further includes a second base shell 12, which is fixedly connected to the first base shell 11. The drive unit 2 further includes a PCB board assembly 25 and a connector 26 disposed within the second base shell 12, with the motor 21 and the connector 26 being electrically connected to the PCB board assembly 25, respectively. The connector 26 is used to connect a power cord or communication line, etc. The PCB board assembly 25 is used to control the operation of the motor 21. The PCB board assembly is fixedly connected within the second base shell 12 by fasteners such as screws. The first base shell 11 and the second base shell 12 can be fixedly connected by bonding, snap-fitting, screw connection, or other conventional means. The connection between the first base shell 11 and the second base shell 12 is waterproof and sealed, for example, by directly bonding with an adhesive to achieve sealing, or by providing a sealing ring.

[0080] The main body of the first base shell 11 is constructed as an enclosed structure, with an open side facing away from the external mounting portion 112. The second base shell 12 is connected to the open side of the first base shell 11. The first and second base shells 11, 12 form an enclosed space, and the drive unit 2 is installed within the space enclosed by the first and second base shells 11, 12. The opening of the first base shell 11 extends from the upper chamber 1101 to the lower chamber 1102, and the shape of the second base shell 12 matches the opening of the first base shell 11. The PCB assembly 25 can be configured to match the shape of the second base shell 12, fully utilizing the space.

[0081] In some embodiments of the present application, as shown in Figures 9 and 10 , a sleeve 14 for mounting a connector 26 is provided within the second base shell 12. The sleeve 14 has open ends at opposite ends, and the connector 26 is inserted into the sleeve 14 from one end. A wiring port 121 is provided at the bottom end of the second base shell 12, and the other end of the sleeve 14 mates with the wiring port 121. Specifically, the top end of the sleeve 14 receives the connector 26, while the bottom end of the sleeve 14 mates with the wiring port 121. A connector for connecting to the connector 26 can extend into the sleeve 14 through the wiring port 121 and connect to the connector 26 within the sleeve 14. The wiring port 121 located at the bottom end of the second base shell 12 provides dust and water protection. Furthermore, the outer side of the connector 26 mates with the inner side of the sleeve 14 via a circumferential positioning structure. The circumferential positioning structure between the connector 26 and the sleeve 14 can be a non-circular surface to prevent the connector 26 from rotating within the sleeve 14.

[0082] In some embodiments of the present application, as shown in Figures 9 and 10 , the inner side of the second base shell 12 is provided with a structural hole 122 for mounting the sleeve 14. A wiring port 121 is an opening at the bottom end of the structural hole 122. The sleeve 14 can be inserted into the structural hole 122 through the wiring port 121, with the bottom end of the sleeve 14 fitting inside the wiring port 121. A connector for connecting to the connector 26 can extend from the bottom end of the sleeve 14 into the sleeve 14. Referring to Figure 3 , the sleeve 14 is located on the side of the PCB assembly 25 away from the bracket 13.

[0083] In some embodiments of the present application, as shown in Figures 3, 5, and 6, the drive unit 2 further includes an encoder 27 for detecting the angular displacement of a gear shaft 221 connected between the bracket 13 and the inner mounting portion 111. The encoder 27 is disposed on the PCB assembly 25, which is close to the bracket 13 and has a compact structure. Specifically, the encoder 27 is used to detect the angular displacement of one of the gear shafts 221 in the gear assembly 22. Because the transmission ratio between the gear shaft 221 and the output shaft 23 can be determined, the detected angular displacement of the gear shaft 221 can reflect the angular displacement of the output shaft 23.

[0084] In one embodiment of the present application, referring to Figures 5, 8, and 11, the encoder 27 includes a magnetic element 271 and a magnetic sensitive element 272. The magnetic element 271 generates a magnetic field, such as a magnet. The magnetic sensitive element 272 can detect magnetic field signals, such as a Hall effect sensor. The magnetic element 271 is located on the side of the bracket 13 near the PCB assembly 25 and is connected to the gear shaft 221. The magnetic element 271 is configured to rotate with the gear shaft 221 to generate a changing magnetic field. The PCB assembly 25 is close to the bracket 13 but does not contact the bracket 13. The magnetic element 271 and the magnetic sensitive element 272 are close to each other. The encoder 27 is directly located between the adjacent PCB assembly 25 and bracket 13 to detect the gear shaft 221, resulting in a compact structure and space saving. In other embodiments, the encoder 27 may also adopt other types of encoders, such as a photoelectric encoder.

[0085] 5 and 6 , a mounting seat 273 may be provided on the bracket 13. The mounting seat 273 is located on a side of the bracket 13 away from the gear assembly 22. The mounting seat 273 is fixedly connected to the end of the gear shaft 221 and rotates with the gear shaft 221. The magnetic element 271 is mounted in the mounting seat 273.

[0086] In one embodiment of the present application, as shown in Figures 11 and 12, one end of the output shaft 23 extends out of the first base housing 11, and the other end extends out of the second base housing 12. The linkage mechanism 3 includes a first connecting rod 31 and a second connecting rod 32 that are detachably fixedly connected. The first connecting rod 31 is connected to one end of the output shaft 23, and the second connecting rod 32 is connected to the other end of the output shaft 23. The output shaft 23 is a unitary structure, and the first connecting rod 31 and the second connecting rod 32 can be connected to opposite ends of the output shaft 23, respectively, to facilitate assembly. The first and second base housings 11 and 12 are mounted between the first and second connecting rods 31 and 32, preventing the first and second base housings 11 and 12 from separating.

[0087] A circumferential positioning structure is provided between the linkage mechanism 3 and the output shaft 23, that is, a circumferential positioning structure is provided between the first connecting rod 31 or the second connecting rod 32 and the output shaft 23. The circumferential positioning structure between the linkage mechanism 3 and the output shaft 23 can be provided on the linkage mechanism 3 and / or the output shaft 23, and the circumferential positioning structure can be provided on the first connecting rod 31 or the second connecting rod 32. The first connecting rod 31 or the second connecting rod 32, which cooperates with the output shaft 23 through the circumferential positioning structure, can rotate with the output shaft 23, thereby driving the chain guide member 4 to move. The first connecting rod 31 and the second connecting rod 32, which are fixedly connected together, rotate synchronously under the drive of the output shaft 23. The circumferential positioning structure between the first connecting rod 31 or the second connecting rod 32 and the output shaft 23 is a non-circular surface, which prevents the two from rotating relative to each other.

[0088] In one embodiment shown in Figures 11 and 12 , the circumferential positioning structure between the linkage mechanism 3 and the output shaft 23 is a knurling 231. The knurling 231 is provided on the output shaft 23, and the output shaft 23 is connected to the first connecting rod 31 via the knurling 231. The output shaft 23 drives the first connecting rod 31 to rotate, which in turn drives the second connecting rod 32 to rotate. The monolithic output shaft 23, with the knurling 231 provided on only one end, simplifies the structure and reduces the difficulty of machining and assembly.

[0089] Specifically, as shown in Figure 4, the first base housing 11 is provided with a first through-hole 113 through which one end of the output shaft 23 extends. As shown in Figure 8, the second base housing 12 is provided with a second through-hole 123 through which the other end of the output shaft 23 extends. The PCB assembly 25 is configured to avoid the second through-hole 123. Seal rings can be provided at each of the first and second through-holes 113, 123 to seal the gaps between them and the output shaft 23.

[0090] Furthermore, as shown in Figure 11, a blind hole for connecting to the output shaft 23 can be provided at the end of the first connecting rod 31, and a blind hole for connecting to the output shaft 23 can be provided at the end of the second connecting rod 32. A washer sleeved around the output shaft 23 can be provided between the first connecting rod 31 and the first base housing 11. A washer sleeved around the output shaft 23 can be provided between the second connecting rod 32 and the second base housing 12. Bearings can be provided at both the first through hole 113 and the second through hole 123 to support the output shaft 23.

[0091] In a specific embodiment shown in Figure 11, a first bearing 15 is provided at the first through-hole 113 of the first base housing 11 to support the output shaft 23. A second bearing 16 is provided at the third connecting portion 133 of the bracket 13 to support the output shaft 23. The output shaft 23 is mounted to the first base housing 11 via the first bearing 15 and the second bearing 16. The fixed sleeve 242 of the transmission member 24 is located near the middle portion of the output shaft 23, and the first bearing 15 and the second bearing 16 are located on opposite sides of the transmission member 24.

[0092] During the assembly process of the base member 1, the first base housing 11 and its components, including the motor 21, gear assembly 22, output shaft 23, transmission member 24, magnetic element 271, and bracket 13, constitute one module. The second base housing 12 and its components, including the PCB assembly 25, connector 26, and sleeve 14, constitute another module. After assembling the two modules, the first and second base housings 11 and 12 are fixedly connected together, completing the assembly of the base member 1. After the base member 1 is assembled, the first and second connecting rods 31 and 32 are connected to the ends of the output shaft 23, respectively, and then fixedly connected together.

[0093] In some embodiments of the present application, as shown in Figures 12 and 13, the first connecting rod 31 and the second connecting rod 32 are connected by a connecting rod fastener 33, such as a screw, a pin, etc. The first connecting rod 31 is provided with a protruding first connecting rod connecting portion 311, and the second connecting rod 32 is provided with a protruding second connecting rod connecting portion 321. The first connecting rod connecting portion 311 and the second connecting rod connecting portion 321 are fixedly connected by the connecting rod fastener 33.

[0094] In detail, as shown in Figure 13, there is a gap between the end of the first connecting rod 31 connected to the output shaft 23 and the end of the second connecting rod 32 connected to the output shaft 23. The middle portion of the first connecting rod 31 and the middle portion of the second connecting rod 32 abut against each other. The first connecting rod connecting portion 311 is located between the two ends of the first connecting rod 31, and the second connecting rod connecting portion 321 is located between the two ends of the second connecting rod 32. The first connecting rod connecting portion 311 and the second connecting rod connecting portion 321 abut against each other. The end of the first connecting rod 31 connected to the chain guide member 4 and the end of the second connecting rod 32 connected to the chain guide member 4 abut against each other.

[0095] Furthermore, a positioning structure is provided between the first connecting rod 31 and the second connecting rod 32 for positioning the first connecting rod 31 and the second connecting rod 32. The positioning structure can be provided at a position close to the middle of the first connecting rod 31 and the second connecting rod 32. Of course, the positioning structure can also be provided at other positions where the first connecting rod 31 and the second connecting rod 32 are in contact with each other. The positioning structure can be a keyway structure, a pin hole and pin column structure or other structures that can achieve a positioning effect. In a specific embodiment as shown in Figure 12, the positioning structure includes a positioning hole 312 and a positioning column 322 that are snap-fitted together. The positioning hole 312 is provided on the first connecting rod 31, and the positioning column 322 is provided on the second connecting rod.

[0096] As shown in Figures 9 and 12, the first and second connecting rods 31, 32 are hingedly connected to the chain guide member 4 via a first rotating shaft 35. Through holes for receiving the first rotating shaft 35 are provided on the end of the first connecting rod 31 and the end of the second connecting rod 32, which are further away from the output shaft 23. The chain guide member 4 is provided with lugs for connecting to the first rotating shaft 35. The first rotating shaft 35 is parallel to the output shaft 23.

[0097] In some embodiments of the present application, as shown in Figures 11, 14, and 15, a first structural groove 114 is provided on the outer side of the first base shell 11, through which one end of the output shaft 23 passes, and a second structural groove 124 is provided on the outer side of the second base shell 12, through which the other end of the output shaft 23 passes. One end of the output shaft 23 of the first connecting rod 31 fits in the first structural groove 114, and one end of the output shaft 23 of the second connecting rod 32 fits in the second structural groove 124, thereby making the overall structure of the base member 1 more compact. Specifically, the first through hole 113 of the first base shell 11 is located within the first structural groove 114, and the second through hole 123 of the second base shell 12 is located within the second structural groove 124.

[0098] The motor 21 outputs forward and reverse torque to drive the output shaft 23 to rotate forward and reverse within a certain angular range, thereby driving the first connecting rod 31 and the second connecting rod 32 to swing back and forth within a certain angular range. The first structural slot 114 is configured to allow the first connecting rod 31 to swing within the first structural slot 114 within a certain angle, and the second structural slot 124 is configured to allow the second connecting rod 32 to swing within the second structural slot 124 within a certain angle.

[0099] Specifically, the first and second structural grooves 114, 124 are located on the side of the base member 1 away from the riding device body. The first structural groove 114 extends to the front and bottom ends of the first base shell 11, while the second structural groove 124 extends to the rear and bottom ends of the second base shell 12. This allows the first and second connecting rods 31, 32 to swing from the side of the base member 1 away from the riding device body to the bottom of the base member 1.

[0100] In some embodiments of the present application, as shown in Figures 9 and 14, the outer sides of the first base shell 11 and the second base shell 12 are constructed with a concave giving way portion 101, and the first connecting rod 31 and the second connecting rod 32 are configured to be able to rotate and cooperate with the giving way portion 101 under the drive of the output shaft 23. The giving way portion 101 gives way to the first connecting rod 31 and the second connecting rod 32, which is beneficial to making the movement range of the chain guide component 4 larger and the overall structure of the electronic transmission more compact.

[0101] Specifically, the clearance portion 101 is disposed on a side of the base member 1 that is away from the riding device body and extends to the bottom end of the base member 1. When the chain guide member 4 moves below the base member 1, the first link 31 and the second link 32 engage with the clearance portion 101. Specifically, referring to FIG. 11 , the clearance portion 101 is configured to clear the first link connection portion 311 and the second link connection portion 321, which are connected by the link fastener 33.

[0102] As shown in Figure 5 , the clearance portion 101 is located below the output shaft 23, and the position of the clearance portion 101 corresponds to the position of the narrower lower chamber 1102 in the first base shell 11. As shown in Figures 14 and 15 , the first structural groove 114 of the first base shell 11 and the second structural groove 124 of the second base shell 12 can extend to the clearance portion 101 below.

[0103] In some embodiments of the present application, as shown in FIG15 , the front surface of the first base shell 11 is provided with an air guide groove 118. The air guide groove 118 extends from the end of the first base shell 11 away from the chain guide member 4 to the end of the first base shell 11 closer to the chain guide member 4. In other words, the air guide groove 118 extends from the top end of the first base shell 11 to the bottom end of the first base shell 11. When the riding device is moving forward, the front surface of the first base shell 11 serves as the windward surface, and this windward surface can be constructed into a streamlined structure to reduce wind resistance.

[0104] Specifically, the outer mounting portion 112 is disposed at the front end of the first base shell 11, the first structural groove 114 extends to the front end of the first base shell 11, and the air guide groove 118 is located between the outer mounting portion 112 and the first structural groove 114. The air guide groove 118 can be configured as a streamlined structure extending to the upper and lower ends of the first base shell 11, guiding airflow up and down, thereby reducing wind resistance.

[0105] In some embodiments of the present application, as shown in Figures 9 and 16, the linkage mechanism 3 also includes an auxiliary connecting rod 34 movably connected between the first base shell 11 and the chain guide member 4. One end of the auxiliary connecting rod 34 is hinged to the first base shell 11 through a second rotating shaft 36, and the other end of the auxiliary connecting rod 34 is hinged to the chain guide member 4 through a third rotating shaft 37. The second rotating shaft 36 and the third rotating shaft 37 are parallel to the output shaft 23. A connecting shaft portion 116 is provided at the bottom end of the first base shell 11, and the connecting shaft portion 116 is used to install the second rotating shaft 36. The connecting shaft portion 116 and the main body of the first base shell 11 are an integral structure. The base member 1, the chain guide member 4, and the first connecting rod 31, the second connecting rod 32, and the auxiliary connecting rod 34 movably connected therebetween constitute a quadrilateral linkage structure.

[0106] As shown in FIG16 , the auxiliary connecting rod 34 includes two fixedly connected auxiliary rods 341, which are fixedly connected by a connecting rod 342. One end of the two auxiliary rods 341 is connected to opposite sides of the coupling portion 116, and the other end of the two auxiliary rods 341 is connected to the chain guide member 4. The auxiliary connecting rod 34 can be a one-piece structure, that is, the two auxiliary rods 341 and the connecting rod 342 are integrally formed.

[0107] Continuing with Figure 16 , an elastic element 38 is further disposed between the linkage mechanism 3 and the chain guide member 4. This elastic element 38 is configured to bias the chain guide member 4 to rotate relative to the linkage mechanism 3 in the rotational direction, i.e., the direction in which the chain guide member 4 tensions the chain. The elastic element 38 is typically a torsion spring, compression spring, or the like. The elastic element 38 can be disposed on the first connecting rod 31, the second connecting rod 32, or the auxiliary connecting rod 34.

[0108] In one embodiment as shown in Figure 16, the elastic element 38 is arranged between the auxiliary connecting rod 34 and the chain guide component 4. The elastic element 38 is a torsion spring and is sleeved on the third rotating shaft 37. One end of the elastic element 38 cooperates with the auxiliary connecting rod 34, and the other end cooperates with the chain guide component 4 to pre-tighten the linkage mechanism 3 of the quadrilateral structure to prevent shaking and clearance.

[0109] In some embodiments of the present application, as shown in Figures 15 and 16 , a baffle 117 is provided on the external mounting portion 112, extending to block the end of the second rotating shaft 36. Specifically, the external mounting portion 112 and the connecting shaft portion 116 of the first base shell 11 are both located on a side proximal to the riding device body, i.e., on the side of the first base shell 11 away from the clearance portion 101. The baffle 117 extends downward from the mounting surface 1121 of the external mounting portion 112. The baffle 117 can be configured as an arc-shaped structure that matches the shape of the mounting surface 1121. The baffle 117 and the external mounting portion 112 can be an integral structure. The baffle 117 can serve to block wind and divert airflow.

[0110] In another embodiment of the present application, a cycling device is provided, comprising a frame 8 and an electronic transmission mounted on the frame 8. The cycling device may be a bicycle, a cycling platform for training / exercise, or other device having a chain and sprocket structure. The structure, principle, and functions of the cycling device provided in this embodiment can all refer to the cycling device to which the electronic transmission provided in the above embodiment is applied. The structure, principle, and functions of the electronic transmission on the cycling device provided in this embodiment are completely consistent with those provided in the above embodiment and will not be described in detail here.

[0111] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terms used herein are selected to best explain the principles of the embodiments, their practical applications, or technical improvements in the marketplace, or to enable other persons skilled in the art to understand the embodiments disclosed herein. The scope of this application is defined by the appended claims.

Claims

1. An electronic transmission, characterized in that, include: A base member, comprising a first base shell of an integral structure, wherein an inner mounting portion is provided on an inner side of the first base shell, and an outer mounting portion is provided on an outer side of the first base shell; A driving unit, comprising a motor, a gear assembly and an output shaft disposed in the first base shell, wherein the gear assembly is drivingly connected between the motor and the output shaft, and the gear assembly is connected to the inner mounting portion; A linkage mechanism connected to the output shaft; A chain guide component is connected to the linkage mechanism.

2. The electronic transmission according to claim 1, characterized in that: The base component also includes a second base shell, which is fixedly connected to the first base shell. The drive unit also includes a PCB board assembly and a connector arranged in the second base shell. The motor and the connector are electrically connected to the PCB board assembly respectively.

3. The electronic transmission according to claim 2, characterized in that: A bracket is connected inside the first base shell, the motor, the gear assembly and the output shaft are connected to the bracket, and the gear assembly is connected between the bracket and the inner mounting portion.

4. The electronic transmission according to claim 3, characterized in that: The gear assembly includes a gear shaft connected between the bracket and the inner mounting portion, and the drive unit also includes an encoder for detecting the angular displacement of the gear shaft. The encoder is arranged on the PCB board assembly, and the PCB board assembly is close to the bracket.

5. The electronic transmission according to claim 4, characterized in that: The encoder includes a magnetic element and a magnetically sensitive element. The magnetic element is arranged on a side of the bracket close to the PCB board assembly and connected to the gear shaft. The magnetic element is configured to generate a changing magnetic field following the rotation of the gear shaft. The magnetically sensitive element is arranged on the PCB board assembly and close to the magnetic element.

6. The electronic transmission according to claim 2, characterized in that: A sleeve for installing the connector is also provided in the second base shell, and a wiring port matching with the bottom end of the sleeve is provided at the bottom end of the second base shell.

7. The electronic transmission according to claim 2, characterized in that: One end of the output shaft extends out of the first base shell, and the other end extends out of the second base shell; the linkage mechanism includes a first connecting rod and a second connecting rod that are detachably fixedly connected, the first connecting rod is connected to one end of the output shaft, the second connecting rod is connected to the other end of the output shaft, and a circumferential positioning structure is provided between the first connecting rod or the second connecting rod and the output shaft.

8. The electronic transmission according to claim 7, characterized in that: A first structural groove is provided on the outer side of the first base shell for one end of the output shaft to pass through, and a second structural groove is provided on the outer side of the second base shell for the other end of the output shaft to pass through. The end of the first connecting rod connected to the output shaft is engaged in the first structural groove, and the end of the second connecting rod connected to the output shaft is engaged in the second structural groove.

9. The electronic transmission according to claim 7, characterized in that: The outer sides of the first base shell and the second base shell are provided with recessed relief portions, and the first connecting rod and the second connecting rod are configured to be able to rotate under the drive of the output shaft to cooperate with the relief portions.

10. The electronic transmission according to claim 1, wherein a communicating upper chamber and a lower chamber are formed in the first base shell, and the lower chamber is narrower than the upper chamber; the gear assembly and the output shaft are arranged in the upper chamber, one end of the motor is arranged in the upper chamber, and the other end is arranged in the lower chamber.

11. The electronic transmission according to claim 1, wherein the gear assembly and the output shaft are connected by a transmission member, the transmission member includes a gear portion that cooperates with the gear assembly, and a fixed shaft sleeve fixedly connected to the output shaft; two limiting portions are provided on the inner side of the first base shell, and the two limiting portions are respectively arranged on opposite sides of the gear portion to limit the swinging angle of the gear portion.

12. The electronic transmission according to claim 1, wherein a wind guiding groove is provided on the front end surface of the first base shell, and the wind guiding groove extends from one end of the first base shell away from the chain guiding member to one end of the first base shell close to the chain guiding member.

13. The electronic transmission according to claim 1, wherein the linkage mechanism further includes an auxiliary connecting rod movably connected between the first base shell and the chain guiding member, one end of the auxiliary connecting rod is hinged to the first base shell through a second rotating shaft, and a baffle extending to block the end of the second rotating shaft is provided on the outer mounting portion.

14. A riding device, comprising a frame, characterized in that, It further includes the electronic transmission according to any one of claims 1 to 13, and the electronic transmission is installed on the vehicle frame.

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