An electronic transmission

Abstract

The utility model discloses an electronic transmission which comprises a base unit, a driving unit, a connecting rod unit, a guide chain unit, a control unit and a battery unit. The base unit comprises a first base shell and a support part. A first inner mounting part is formed in the first base shell, and a second inner mounting part is formed on the support part. The driving unit comprises a motor, a gear assembly and an output shaft. The motor drives the output shaft through the gear assembly. The gear assembly is installed between the first inner mounting part and the second inner mounting part. The output shaft drives the connecting rod unit to move. The connecting rod unit drives the guide chain unit to move. The control unit comprises a PCBA board. The battery unit is installed in the base unit and electrically connected with the PCBA board. The utility model aims to provide an electronic transmission. The base member is integrated with an installation structure of a gear structure. The number of parts and the weight of the whole machine are reduced. The compactness of the structure is improved. The product size is reduced. The battery function is integrated.

Description

Technical Field

[0001] This utility model belongs to the field of cycling equipment technology, specifically, it relates to an electronic gearbox. Background Technology

[0002] Bicycle derailleurs perform gear shifting by switching the chain between multiple adjacent sprockets in the bicycle's sprocket assembly. Because the sprockets have different sizes, the bicycle can change gears by coordinating the chain with different sprockets. An electronic derailleur is generally constructed as follows: a base component is mounted on the riding device frame, and a chain guide component is movably connected to the base component via a linkage. Driven by a drive motor, the chain guide component moves between the sprockets in the sprocket assembly, shifting the chain from the initial sprocket to the target sprocket. The drive motor reduces and increases the output torque through a reduction gearbox. Chinese utility model patent CN113859421B, entitled "Bicycle Derailleur, Bicycle Gear Structure, Bicycle Motor Unit, and Front Derailleur," discloses a bicycle derailleur that includes a base component, a linkage component, a motor and a gear structure installed within the base component, and first, second, third, fourth, and fifth support components for mounting the gear structure. This design is complex, with numerous parts, resulting in cumbersome assembly processes and high manufacturing costs. Furthermore, to power the electronic derailleur, a cable needs to be routed from within the electronic derailleur, complicating the internal wiring design and reducing the overall sealing and waterproofing performance of the electronic derailleur.

[0003] Therefore, developing an electronic transmission with a mounting structure that integrates gears within the base component to reduce the number of parts and overall weight, improve structural compactness, shrink product size, and integrate battery functionality is an urgent technical problem to be solved. Summary of the Invention

[0004] The purpose of this utility model is to provide an electronic transmission with a mounting structure that integrates a gear structure within the base component, thereby reducing the number of parts and the overall weight, improving structural compactness, reducing product size, and integrating battery functionality.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution: This utility model proposes an electronic transmission, comprising: A base unit includes a first base shell and a support portion, wherein a first inner mounting portion is formed inside the first base shell and a second inner mounting portion is formed on the support portion; A drive unit includes a motor, a gear assembly, and an output shaft. The motor drives the output shaft through the gear assembly, which is mounted between the first inner mounting portion and the second inner mounting portion. Linkage unit, the output shaft drives the linkage unit to move; The chain guide unit is driven to move by the linkage unit. The control unit includes a PCBA board; A battery cell is installed within the base unit and is electrically connected to the PCBA board.

[0006] In some embodiments of this application, the base unit further includes a second base shell; The battery unit includes a battery, an adhesive part, and a buffer part; The first end of the battery is connected to the inner wall of the first base shell through the adhesive part; The second end of the battery abuts against the inner wall of the second base shell through the buffer portion.

[0007] In some embodiments of this application, the material of the first base shell is metal; Alternatively, the buffer portion may be a U-shaped foam, which is fitted over the second end of the battery.

[0008] In some embodiments of this application, the first inner mounting portion includes a plurality of connecting portions and a plurality of positioning portions formed on the inner wall of the first base shell; The gear assembly is rotatably mounted between the plurality of positioning portions and the second inner mounting portion, and the gear assembly is connected to the first base shell through the plurality of connecting portions.

[0009] In some embodiments of this application, the connecting part includes a first cylindrical structure disposed inside the first base shell, the first cylindrical structure having a first threaded hole, and the supporting part being threadedly connected to the first threaded hole via a first fastening component; The positioning part includes a second columnar structure disposed inside the first base shell, and a bushing is disposed inside the second columnar structure. One end of the gear shaft of the gear assembly is rotatably connected to the bushing, and the other end of the gear shaft of the gear assembly is rotatably connected to the support part.

[0010] In some embodiments of this application, the motor is fixedly mounted on one end of the support, and the other end of the support is rotatably fitted onto the output shaft; the gear shaft of the gear assembly is rotatably connected to the middle of the support.

[0011] In some embodiments of this application, the first base shell and the second base shell surround to form an installation cavity; The battery unit, the gear assembly, and the motor are sequentially installed in the mounting cavity; With the base unit installed on the riding device, the battery unit is located above the gear assembly and the motor within the mounting cavity.

[0012] In some embodiments of this application, the linkage unit includes an active linkage, and the active linkage includes a first active sub-link and a second active sub-link; The driving end of the first active sub-link and the driving end of the second active sub-link are connected to the two ends of the output shaft; the output shaft drives the first active sub-link and the second active sub-link to rotate. A first connecting portion is formed in the middle of the first active sub-link, and a second connecting portion is formed in the middle of the second active sub-link; the first connecting portion and the second connecting portion are detachably connected. The output ends of the first active sub-link and the second active sub-link are connected to the chain guide unit.

[0013] In some embodiments of this application, the first connecting portion is provided with a second threaded hole and a positioning hole; The second connecting part is provided with a third threaded hole and a positioning post; With the positioning pin inserted into the positioning hole, the second threaded hole is connected to the second threaded hole by the second fastening assembly.

[0014] In some embodiments of this application, an outer mounting portion is formed on the outside of the first base shell, and the base unit is detachably connected to the cycling device through the mounting portion; With the base unit installed on the riding device, the first base shell is located on the front side of the riding device in the riding direction relative to the second base shell, and the second base shell is located on the rear side of the riding device in the riding direction relative to the first base shell; a clearance portion is formed on the second base shell on the side of the second base shell near the rear wheel of the riding device; an air guide groove is formed on the front surface of the first base shell near the riding direction of the riding device, and the air guide groove is arranged in a vertical direction.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are: By installing the gear assembly between the first and second inner mounting parts within the base unit, the installation of the gear assembly is integrated into the structure of the base unit. This reduces the number of parts, shortens the installation time, and allows for a tighter fit between components. Furthermore, the tighter fit saves space, allowing the battery unit to also be installed within the base unit. The battery unit powers the control unit, eliminating the need for a separate power cable leading to the outside of the electronic transmission. This better ensures the sealing performance of the electronic transmission while reducing the need for internal wiring.

[0016] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front view of one embodiment of an electronic transmission proposed in this utility model; Figure 2 This is a side view of the internal structure of an embodiment of an electronic transmission proposed in this utility model; Figure 3 This is a top view of the internal structure of an embodiment of an electronic transmission proposed in this utility model; Figure 4 This is a schematic diagram of the overall structure of one embodiment of an electronic transmission proposed in this utility model; Figure 5 This is one of the internal structural schematic diagrams of an embodiment of an electronic transmission proposed in this utility model; Figure 6 yes Figure 5 A partial schematic diagram at point B in the middle; Figure 7 A second schematic diagram of the internal structure of an embodiment of an electronic transmission proposed in this utility model; Figure 8 This is the book Figure 7 A partial schematic diagram at point C in the middle; Figure 9 This is a schematic diagram of the structure of the first drive linkage of an embodiment of an electronic transmission proposed in this utility model; Figure 10This is a schematic diagram of the structure of the second drive linkage in one embodiment of an electronic transmission proposed in this utility model; Figure 11 This is a schematic diagram of the structure of the first base shell of an embodiment of an electronic transmission proposed in this utility model; Figure 12 This is a side view of one embodiment of an electronic transmission proposed in this utility model; Figure 13 yes Figure 12 Sectional view along line AA; Figure 14 This is the third internal structural schematic diagram of an embodiment of an electronic transmission proposed in this utility model; Figure 15 This is the fourth internal structural schematic diagram of an embodiment of an electronic transmission proposed in this utility model; Figure 16 This is a side view of one embodiment of an electronic transmission proposed in this utility model; In the picture, 110. First base shell; 1111, Connecting part; 1112. Positioning section; 112. Air guide duct; 113. External installation unit; 120. Second base shell; 121. Avoidance section; 130. Support section; 141. First mounting cavity; 142. Second mounting cavity; 143. Third mounting cavity; 210. Electric motor; 220. Gear assembly; 221. Gear shaft; 222. Gear; 223. Worm gear; 230. Output shaft; 231. Output shaft body; 232. Transmission components; 2321. Gear section; 240. First fastening assembly; 300. Linkage unit; 310. Active linkage; 311. First driving link; 3111, Second threaded hole; 3112. Positioning hole; 312. Second driving link; 3121, Third threaded hole; 3122. Positioning post; 400, conveyor chain unit; 500, battery cell; 510. Battery; 520. Paste section; 530. Buffer section; 540. Cables; 600. Control unit; 610. PCBA board; 620. Magnetic charging module; 630. Button. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, direct connections, or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] The following disclosure provides many different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0025] In some embodiments of this application, an electronic transmission is involved, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 As shown, it includes a base unit, a drive unit, and a linkage unit 300.

[0026] In some embodiments of this application, the electronic transmission further includes a chain guide unit 400, a battery unit 500, and a control unit 600. The linkage unit 300 drives the chain guide unit 400. The battery unit 500 is mounted within the base unit.

[0027] The battery unit 500 is installed inside the base unit, thus avoiding the need for cables to be routed out from the base unit.

[0028] The drive unit is installed within the base unit. To reduce the number of components and minimize the overall size of the base unit, the drive unit's mounting structure is integrated within the base unit.

[0029] like Figure 6 , Figure 8 As shown, the base unit includes a first base shell 110 and a support portion 130. The support portion 130 is disposed within the base unit.

[0030] The first inner mounting part is formed inside the first base shell 110.

[0031] A second inner mounting part is formed on the support part 130.

[0032] An installation area is formed between the first base shell 110 and the support portion 130 for installing the drive unit.

[0033] The outer surface of the first base shell 110 has an outer mounting portion 113, through which the base unit is detachably connected to the cycling device.

[0034] The drive unit includes a motor 210, a gear assembly 220, and an output shaft 230. The motor 210 outputs power to the gear assembly 220, which then transmits the power to the output shaft 230. The output shaft 230 drives the linkage unit 300 to move.

[0035] The gear assembly 220 is mounted between the first base shell 110 and the support portion 130 via the first inner mounting portion and the second inner mounting portion.

[0036] The base unit also includes a second base shell 120. The first base shell 110 and the second base shell 120 surround and form a mounting cavity.

[0037] Both the drive unit and the battery unit 500 are installed inside the mounting cavity.

[0038] like Figure 11 As shown, the first inner mounting portion includes a plurality of connecting portions 1111 and a plurality of positioning portions 1112 formed inside the first base shell 110. The plurality of connecting portions 1111 are detachably connected to the PCBA board 610.

[0039] The first base shell 110 and the second base shell 120 are connected by adhesive.

[0040] With the gear assembly 220 installed between the first base shell 110 and the support portion 130, a plurality of connecting portions 1111 are detachably connected to the first base shell 110 via the first fastening assembly 240.

[0041] To position the gear shaft 221 of the gear assembly 220, a plurality of positioning portions 1112 are formed inside the first base housing 110. The gear assembly 220 is rotatably mounted between the plurality of positioning portions 1112 and the second inner mounting portion.

[0042] Specifically, the connecting part 1111 includes a first cylindrical structure disposed inside the first base shell 110, and a first threaded hole is provided in the first cylindrical structure.

[0043] The two ends of the gear shaft 221 of the gear assembly 220 are rotatably connected to several positioning parts 1112 and support parts 130, respectively, thereby realizing the rotational support of the gear assembly 220.

[0044] A first connecting hole is made on the support part 130. One end of the first fastening component 240 passes through the first connecting hole and is threadedly connected to the first threaded hole. The other end of the first fastening component 240 abuts against the support part 130, thereby realizing the detachable connection between the support part 130 and the first base shell 110.

[0045] This enables the positioning and installation of the gear assembly 220 relative to the support portion 130 and the first base shell 110, as well as the installation of the support portion 130 relative to the first base shell 110.

[0046] In some embodiments of this application, the support portion 130 is also used for mounting the motor 210. The motor 210 is mounted on one end of the support portion 130, thereby enabling the motor 210 to be mounted within the base unit.

[0047] The other end of the support part 130 is fitted onto the output shaft 230, and the support part 130 and the output shaft 230 are rotatably connected.

[0048] One end of the gear shaft 221 of the gear assembly 220 is rotatably connected to the middle of the support portion 130.

[0049] Specifically, gear assembly 220 includes at least one gear 222. Gear assembly 220 includes at least one gear shaft 221. Gear 222 is mounted between a first inner mounting portion and a second inner mounting portion formed on the support portion 130 and the first base housing 110 via gear shaft 221. The number and position of positioning portions 1112 match the number and position of gear shafts 221.

[0050] The positioning part 1112 includes a second cylindrical structure disposed inside the first base shell 110, and a bushing disposed inside the second cylindrical structure. The gear shaft 221 of the gear assembly 220 is rotatably connected to the bushing, thereby achieving the positioning of the gear shaft 221 of the gear assembly 220.

[0051] The bushing can be installed in the bushing mounting hole opened on the second columnar structure by interference fit, or the bushing can be installed in the bushing mounting hole by adhesive.

[0052] The support unit 130 integrates the mounting support function of the motor 210, the rotatable mounting support of the gear assembly 220, and the rotatable connection function with the output shaft 230 into one unit, reducing the number of parts and thus providing support for the motor 210, gear assembly 220, and output shaft 230.

[0053] The output shaft 230 also includes an output shaft body 231 and a transmission component. The gear assembly 220 is connected to the output shaft 230 via the transmission component. The transmission component includes a gear portion 2321 and a fixed bushing. The gear portion 2321 engages with the gear assembly 220. Specifically, the gear portion 2321 has a toothed structure that meshes with the gear 222 of the gear assembly 220. When the gear 222 rotates, it causes the gear portion 2321 to oscillate. The fixed bushing is fixedly mounted within the positioning portion 1112. The end of the gear shaft 221 is rotatably connected to the fixed bushing.

[0054] The gear assembly 220 includes a worm gear 223 and a worm. The torque output by the motor 210 is transmitted to the output shaft 230 after the worm gear 223 and the worm change direction.

[0055] The output end of motor 210 is connected to a worm gear. One end of the worm gear is coaxially connected to the output end of motor 210, and the other end is rotatably connected to support 130. Worm gear 223 is rotatably connected between support 130 and first inner mounting part via gear shaft 221, and cooperates with worm gear. The rotation axis of worm gear 223 is parallel to the axis of output shaft 230. Worm gear 223 and output shaft 230 can be connected by transmission through at least one gear 222, and the rotation axis of each gear 222 is also parallel to the axis of output shaft 230.

[0056] like Figure 9 , Figure 10 As shown, the linkage unit 300 includes an active linkage 310. The active linkage 310 includes a first active sub-link 311 and a second active sub-link 312.

[0057] The drive end of the first active sub-link 311 and the drive end of the second active sub-link 312 are connected to the two ends of the output shaft 230.

[0058] In detail, the drive end of the first active sub-link 311 and the drive end of the second active sub-link 312 are connected to the two ends of the output shaft body 231.

[0059] Knurling is formed on the outer circumference of one end of the output shaft body 231. Correspondingly, a knurled hole that mates with the knurling is formed on the driving end of the first active sub-connecting rod 311. The knurling, by engaging with the knurled hole, enables the output shaft body 231 to drive the rotation of the driving end of the first active sub-connecting rod 311. This achieves the transmission of power from the drive unit to the connecting rod unit 300.

[0060] In some other embodiments of this application, the drive end of the first active sub-link 311 is interference-fitted with the output shaft body 231.

[0061] In this application, there is no limitation on the method of achieving circumferential positioning between the first active sub-link 311 and the output shaft body 231, as long as circumferential positioning can be achieved.

[0062] A first connecting portion is formed in the middle of the first driving sub-link 311, and correspondingly, a second connecting portion is formed in the middle of the second driving sub-link 312. The first connecting portion and the second connecting portion are detachably connected. When the driving ends of the first driving sub-link 311 and the second driving sub-link 312 are connected to the two ends of the output shaft body 231, the first connecting portion and the second connecting portion are connected.

[0063] The specific connection scheme between the first connecting part and the second connecting part can adopt various structural methods. No limitation is made in this application.

[0064] Specifically, the first connecting part is provided with a second threaded hole 3111 and a positioning hole 3112. The second connecting part is provided with a third threaded hole 3121 and a positioning pin 3122.

[0065] With the positioning pin 3122 inserted into the positioning hole 3112 and the second threaded hole 3111 and the third threaded hole 3121 in corresponding positions, the second fastening assembly is sequentially connected to the second threaded hole 3111 and the third threaded hole 3121 to achieve the connection between the first connecting part and the second connecting part.

[0066] The output ends of the first active sub-link 311 and the second active sub-link 312 are connected to the chain guide unit 400.

[0067] The output shaft 230 and the active connecting rod 310 adopt a locking structure design, and the appearance structure is simple.

[0068] The first base shell 110 and the second base shell 120 enclose a mounting cavity, within which the drive unit, battery unit 500, and control unit 600 are all installed. To ensure a compact structural layout and efficient use of the space within the mounting cavity, the relative positions of the drive unit, battery unit 500, and control unit 600 need to be rationally arranged.

[0069] The control unit 600 includes a PCBA board 610. The PCBA board 610 is located within the mounting cavity.

[0070] When the electronic gearbox is installed on the riding equipment, such as Figure 1 As shown, the direction extending vertically is defined as the Z direction, the direction extending along the riding direction of the riding device is defined as the Y direction, and the direction perpendicular to the Z and Y directions is defined as the X direction.

[0071] In some embodiments of this application, such as Figure 2 , Figure 12 , Figure 15As shown, along the Y-direction, the battery cell 500 is located above the PCBA board 610, and the projections of the battery cell 500 and the PCBA board 610 along the Y-direction do not overlap. This allows the battery cell 500 and the PCBA board 610 to be arranged compactly along the Y-direction, thus ensuring that the size of the base unit along the Y-direction is small.

[0072] like Figure 3 As shown, along the Z direction, the projected dimension of the battery cell 500 along the X direction is smaller than the dimension of the PCBA board 610 along the X direction. This ensures that even with the addition of the battery cell 500, the dimension of the base unit along the X direction does not increase.

[0073] This allows the battery cell 500 to occupy only the dimensions of the base cell along the Z direction. When the electronic gearbox is installed in the riding device, the battery cell 500 only increases the height of the electronic gearbox.

[0074] like Figure 3 As shown, along the Z direction, the projection of the battery unit 500 overlaps with the projection of the output shaft 230, making the structure of the battery unit 500 and the output shaft 230 more compact along the X and Y directions.

[0075] In some embodiments of this application, the control unit 600 further includes a magnetic charging module 620. Along the Y direction, the projection of the magnetic charging module 620 lies within the area of ​​the PCBA board 610.

[0076] In some embodiments of this application, the control unit 600 further includes a button 630. Along the Y direction, the projection of the button 630 is located within the area of ​​the PCBA board 610.

[0077] This ensures that the additional setup of the magnetic charging module 620 and the button 630 does not increase the size of the electronic transmission in the X direction.

[0078] like Figure 14 As shown, along the X direction, the battery unit 500 is located above the PCBA board 610, the magnetic charging module 620 and the button 630 are located on one side of the PCBA board 610, and the support part 130 and the gear assembly 220 are located on the other side of the PCBA board 610.

[0079] Since the magnetic charging module 620 and the button 630 are located on the same side of the PCBA board 610, the layout of the electronic gearbox along the Y direction is more compact.

[0080] In some embodiments of this application, the PCBA board 610 is housed within the second base shell 120 on the side closest to the first base shell 110.

[0081] like Figure 14 As shown, on one side of the PCBA board 610, the PCBA board 610 and the second base shell 120 surround to form a first mounting cavity 141. The magnetic charging module 620 is disposed through the first mounting cavity 141, and the button 630 is disposed through the first mounting cavity 141.

[0082] One end of the magnetic charging module 620 is electrically connected to the PCBA board.

[0083] Button 630 can trigger the button functions of the PCBA board.

[0084] The other end of the magnetic charging module 620 passes through the first mounting cavity 141 and extends out of the second base shell 120. Operators can charge the battery unit 500 using the magnetic charging module 620 via magnetic charging.

[0085] The other end of button 630 passes through the first mounting cavity 141 and extends out of the second base shell 120, allowing the operator to press button 630.

[0086] With the first base shell 110 and the second base shell 120 in the installed state, a second mounting cavity 142 is formed between the PCBA board 610 and the second base shell 120 on the other side of the PCBA board 610. The gear assembly 220 is installed in this second mounting cavity 142.

[0087] On the upper side of the PCBA board 610, a third mounting cavity 143 is formed between the first base shell 110 and the second base shell 120, and the battery unit 500 is installed in the third mounting cavity 143.

[0088] The first mounting cavity 141, the second mounting cavity 142 and the third mounting cavity 143 are connected to form the aforementioned mounting cavity.

[0089] In some embodiments of this application, the battery unit 500 includes a battery 510, an adhesive portion 520, and a buffer portion 530.

[0090] Battery 510 is electrically connected to PCBA board 610 via cable 540. Because battery 510 and PCBA board 610 are close together, cable 540 is short and easy to route.

[0091] The first end of the battery 510 is connected to the inner wall of the first base shell 110 via the adhesive part 520.

[0092] The second end of the battery 510 abuts against the inner wall of the second base shell 120 via the buffer portion 530.

[0093] The adhesive part 520 is made of a thermally conductive material, and the first base shell 110 is made of a metal material. The heat generated by the battery 510 is transferred to the first base shell 110 through the adhesive part 520. The first base shell is provided with an air guide groove to achieve rapid heat dissipation of the battery 510.

[0094] The buffer section 530 can be supported by materials with cushioning properties such as foam. When the electronic gearbox is installed on the riding equipment, if the electronic gearbox is subjected to vibration, impact, or other forces, and the battery 510 experiences a slight relative displacement relative to the base unit, the buffer section 530 can absorb the aforementioned impact vibrations, thus avoiding rigid collisions between the battery 510 and the base unit.

[0095] Specifically, the buffer section 530 can be U-shaped, and the U-shaped buffer section 530 is fitted onto the second end of the battery 510.

[0096] In some embodiments of this application, the electronic gearbox is installed on the riding device, with the first base shell 110 positioned relative to the second base shell 120 at the front end of the riding device in the riding direction, and the second base shell 120 positioned at the rear end of the riding device in the riding direction.

[0097] like Figure 16 As shown, a clearance portion 121 is formed on the second base shell 120. The clearance portion 121 is formed on the side of the second base shell 120 near the rear wheel of the riding device to reduce the possibility of collision between the electronic gearbox and the rear wheel.

[0098] An air guide groove 112 extends from the front surface of the first base shell 110 near the riding direction of the cycling device. The air guide groove 112 extends vertically. The first base shell 110 is streamlined, and the air guide groove 112 can reduce wind resistance.

[0099] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0100] Whenever possible, the various aspects and features described and shown in the specification can be applied individually, and these individual aspects can serve as the subject of a divisional application.

[0101] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An electronic transmission, characterized in that, include: A base unit includes a first base shell and a support portion, wherein a first inner mounting portion is formed inside the first base shell and a second inner mounting portion is formed on the support portion; A drive unit includes a motor, a gear assembly, and an output shaft. The motor drives the output shaft through the gear assembly, which is mounted between the first inner mounting portion and the second inner mounting portion. Linkage unit, the output shaft drives the linkage unit to move; The chain guide unit is driven to move by the linkage unit. The control unit includes a PCBA board; A battery cell is installed within the base unit and is electrically connected to the PCBA board.

2. The electronic transmission according to claim 1, characterized in that, The base unit also includes a second base shell; The battery unit includes a battery, an adhesive part, and a buffer part; The first end of the battery is connected to the inner wall of the first base shell through the adhesive part; The second end of the battery abuts against the inner wall of the second base shell through the buffer portion.

3. The electronic transmission according to claim 2, characterized in that, The material of the first base shell is metal; Alternatively, the buffer portion may be a U-shaped foam, which is fitted over the second end of the battery.

4. The electronic transmission according to claim 2, characterized in that, The first internal mounting portion includes a plurality of connecting portions and a plurality of positioning portions formed on the inner wall of the first base shell; The gear assembly is rotatably mounted between the plurality of positioning portions and the second inner mounting portion, and the gear assembly is connected to the first base shell through the plurality of connecting portions.

5. The electronic transmission according to claim 4, characterized in that, The connecting part includes a first cylindrical structure disposed inside the first base shell, the first cylindrical structure having a first threaded hole, and the supporting part being threadedly connected to the first threaded hole via a first fastening component; The positioning part includes a second columnar structure disposed inside the first base shell, and a bushing is disposed inside the second columnar structure. One end of the gear shaft of the gear assembly is rotatably connected to the bushing, and the other end of the gear shaft of the gear assembly is rotatably connected to the support part.

6. The electronic transmission according to claim 1, characterized in that, The motor is fixedly mounted on one end of the support, and the other end of the support is fitted onto the output shaft. The output shaft can rotate relative to the other end of the support. The gear shaft of the gear assembly is rotatably connected to the middle of the support.

7. The electronic transmission according to claim 2, characterized in that, The first base shell and the second base shell surround and form an installation cavity; The battery unit, the gear assembly, and the motor are sequentially installed in the mounting cavity; With the base unit installed on the riding device, the battery unit is located above the gear assembly and the motor within the mounting cavity.

8. The electronic transmission according to claim 1, characterized in that, The linkage unit includes an active linkage, and the active linkage includes a first active sub-link and a second active sub-link. The driving end of the first active sub-link and the driving end of the second active sub-link are connected to the two ends of the output shaft; the output shaft drives the first active sub-link and the second active sub-link to rotate. A first connecting portion is formed in the middle of the first active sub-link, and a second connecting portion is formed in the middle of the second active sub-link; the first connecting portion and the second connecting portion are detachably connected. The output ends of the first active sub-link and the second active sub-link are connected to the chain guide unit.

9. The electronic transmission according to claim 8, characterized in that, The first connecting part is provided with a second threaded hole and a positioning hole; The second connecting part is provided with a third threaded hole and a positioning post; With the positioning pin inserted into the positioning hole, the second threaded hole is connected to the second threaded hole by the second fastening assembly.

10. The electronic transmission according to claim 2, characterized in that, An outer mounting portion is formed on the outside of the first base shell, and the base unit is detachably connected to the riding device through the outer mounting portion; With the base unit installed on the riding device, the first base shell is located on the front side of the riding device in the riding direction relative to the second base shell, and the second base shell is located on the rear side of the riding device in the riding direction relative to the first base shell; a clearance portion is formed on the second base shell on the side of the second base shell near the rear wheel of the riding device; an air guide groove is formed on the front surface of the first base shell near the riding direction of the riding device, and the air guide groove is arranged in a vertical direction.

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