A pawl seat and assembly method of an inner variable speed hub

Abstract

The present application belongs to the technical field of internal gearboxes, and particularly relates to a pawl seat and an assembly method of an internal gear change hub. The pawl seat provided by the present application is formed with multiple matching surfaces, can axially and circumferentially position the pawl seat, and can reduce assembly procedures and improve assembly precision when the internal gear change part is assembled. By improving the assembly precision, unnecessary inspection and repair procedures can be avoided, and production cost can be reduced. The assembly method of the internal gear change hub provided by the present application first assembles the motor part with high assembly precision, then assembles the internal gear change part with low assembly precision, and finally integrally assembles the whole, thereby improving the assembly precision. The assembly method also adopts a unique cable threading method, can avoid cable stacking or breakage, and makes the cables uniformly exit from one end, which is more beautiful and more convenient for wiring with external equipment.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of internal gearboxes, and particularly relates to a pawl seat and an assembly method of an internal gear change hub. BACKGROUND

[0002] In the invention patent application with the name of an internal gear change hub with an internal motor, a bicycle and a gear shifting control method, application number CN202310571433.1, filed by the applicant on May 20, 2023, a technical solution of installing a pawl by using a pawl seat is described, but the pawl seat in the prior art relies on other structures for assembly and positioning, which will cause problems such as difficult assembly and low assembly precision.

[0003] Therefore, the prior art needs to be improved and developed. SUMMARY

[0004] The purpose of the present application is to provide a pawl seat and an assembly method of an internal gear change hub, which can reduce the assembly process and has the characteristics of high assembly precision.

[0005] To solve the above technical problems, the pawl seat provided by the present application is provided with a second limiting groove in the center, and a pawl mounting groove is further arranged on the outer circumferential surface of the pawl seat. The pawl is mounted in the pawl mounting groove, and the pawl has two states of outward opening and inward closing. The pawl seat is formed with a plurality of matching surfaces for axial positioning and circumferential positioning of the pawl seat.

[0006] Further, the plurality of matching surfaces formed by the pawl seat include a first matching surface, which cooperates with the matching surface corresponding to the driving mechanism, so as to circumferentially position the pawl seat.

[0007] Further, the plurality of matching surfaces formed by the pawl seat include a fourth matching surface, which cooperates with the matching surface corresponding to the transmission mechanism, so as to circumferentially position the pawl seat.

[0008] Further, the first matching surface and the fourth matching surface are cylindrical surfaces.

[0009] Further, the plurality of matching surfaces formed by the pawl seat include a second matching surface, which cooperates with the matching surface corresponding to the mandrel, so as to axially position the pawl seat.

[0010] Further, the outer circumferential surface of the pawl seat is further provided with a snap spring groove, and a snap spring is mounted in the snap spring groove. The snap spring keeps the pawl outwardly open.

[0011] Further, the outer circumferential surface of the pawl seat is further provided with a relief groove.

[0012] Further, the pawl mounting slot is provided with two groups.

[0013] Further, one end of the pawl seat is provided with a fifth wire passing slot, which is in communication with the second limiting slot.

[0014] Further, the pawl seat is split type.

[0015] The application also provides an assembly method of the inner variable speed hub, comprising the above pawl seat, and comprising the following steps:

[0016] Assembling the motor part, assembling the motor module with the mandrel and the output respectively, taking the first cable, one end of the first cable being a quick release connector, the other end of the first cable being connected to the motor module, a part of the wire core of the first cable being connected to the circuit board of the motor module, taking the second cable, one end of the second cable being connected to the other part of the wire core of the first cable, the other end of the second cable being led out through the fifth wire passing slot to the gap of the mandrel, and fastening the first end cover to the output;

[0017] Assembling the inner variable speed part, assembling the pawl seat with the pawl of the gear shifting control mechanism and the gear shifting control device first, then assembling the pawl seat with the driving mechanism and the transmission mechanism respectively, after assembly, making the second matching surface of the pawl seat flush with the first end surface of the driving mechanism, and fixedly matching the transmission mechanism with the second end cover, taking the third cable, leading the third cable through the wire passing hole of the control box and the fifth wire passing slot of the pawl seat in sequence, and connecting one end of the third cable with the circuit board of the control box;

[0018] Placing the third cable into the third wire passing slot and leading it out to the gap, assembling the combination of the motor part and the combination of the inner variable speed part, fastening the second end cover with the output, cutting and flattening the ends of the second cable and the third cable, connecting the second cable and the third cable, and finally closing the gap with the plug.

[0019] Further, the assembling step of the pawl seat with the driving mechanism comprises:

[0020] Taking the first matching surface of the pawl seat as the positioning reference, the driving mechanism is sleeved on the first matching surface of the pawl seat to position the pawl seat circumferentially.

[0021] Further, the assembling step of the pawl seat with the transmission mechanism comprises:

[0022] Taking the fourth matching surface of the pawl seat as the positioning reference, the transmission mechanism is sleeved on the fourth matching surface of the pawl seat to position the pawl seat circumferentially.

[0023] Further, the assembling step of the combination of the motor part and the combination of the inner variable speed part comprises:

[0024] The second matching surface of the pawl seat is abutted with the seventh matching surface of the mandrel, so as to axially position the pawl seat.

[0025] Further, a fourth cable is connected to the circuit board of the control box, and the fourth cable is used to receive a communication signal, and the fourth cable is arranged in the same way as the third cable.

[0026] As can be seen from the above, the pawl seat provided by the application is formed with a plurality of matching surfaces, which can axially position and circumferentially position the pawl seat. When assembling the inner variable speed part, the assembly process can be reduced, the assembly precision is high, the problems of defective products, failures or unstable performance caused by assembly errors can be effectively avoided, and the quality and reliability of the product are improved. By improving the assembly precision, unnecessary inspection and repair processes can be avoided, and the production cost is reduced. Since the assembly parts are more accurate in cooperation and alignment, the assembly speed can also be improved, thereby increasing the production efficiency and yield. The assembly method of the inner variable speed hub provided by the application assembles the motor part with high assembly precision first, then assembles the inner variable speed part with low assembly precision, and finally assembles the whole, thereby improving the assembly precision. The assembly method also adopts a unique cable threading method, which can avoid cable stacking or breaking, and makes the cables uniform from one end, which is more beautiful and convenient for wiring with external equipment.

[0027] Other features and advantages of the application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application. The objects and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 Structure diagram of an electric-assisted bicycle with an existing built-in motor and a hand-automatic integrated inner variable speed hub.

[0029] Figure 2 Perspective view of an existing built-in motor and a hand-automatic integrated inner variable speed hub.

[0030] Figure 3 Front view of an existing built-in motor and a hand-automatic integrated inner variable speed hub.

[0031] Figure 4 Left view of an existing built-in motor and a hand-automatic integrated inner variable speed hub.

[0032] Figure 5 is Figure 4 Sectional view along line A-A.

[0033] Figure 6 Perspective view of an existing driving mechanism.

[0034] Figure 7 perspective view of the drive mechanism of the prior art.

[0035] Figure 8 perspective view of the shift control mechanism.

[0036] Figure 9 perspective view of the shift control mechanism.

[0037] Figure 10 front view of the shift control mechanism.

[0038] Figure 11 is Figure 10 sectional view along the line B-B.

[0039] Figure 12 is Figure 10 sectional view along the line C-C.

[0040] Figure 13 perspective view of the pawl seat of the prior art.

[0041] Figure 14 perspective view of the first pawl of the prior art.

[0042] Figure 15 perspective view of the first pawl of the prior art from another angle.

[0043] Figure 16 schematic view of the first pawl of the prior art in two states.

[0044] Figure 17 schematic view of the first pawl of the prior art in conjunction with the first sun gear.

[0045] Figure 18 perspective view of the drive mechanism of the prior art.

[0046] Figure 19 perspective view of the drive mechanism of the prior art from another angle.

[0047] Figure 20 exploded view of the drive mechanism of the prior art.

[0048] Figure 21 longitudinal sectional view of the drive mechanism of the prior art.

[0049] Figure 22 perspective view of the pawl seat of the present application.

[0050] Figure 23 perspective view of the pawl seat of the present application from another angle.

[0051] Figure 24 front view of the pawl seat of the present application.

[0052] Figure 25 Figure 1 is a perspective view of the transmission part of the present application. Figure 24 Figure 2 is a sectional view along line D-D of Figure 1.

[0053] Figure 26 Figure 3 is a perspective view of the assembled transmission part of the present application. Figure 24 Figure 4 is a sectional view along line E-E of Figure 3.

[0054] Figure 27 Figure 5 is a perspective view of the mandrel part of the present application.

[0055] Figure 28 Figure 6 is a sectional view of the mandrel part of the present application.

[0056] Figure 29 Figure 7 is a perspective view of the motor part of the present application.

[0057] Figure 30 Figure 8 is a sectional view of the motor part of the present application.

[0058] Figure 31 Figure 9 is a perspective view of the assembled motor part of the present application.

[0059] Figure 32 Figure 10 is a schematic view of the assembly method of the present application.

[0060] Figure 33 Figure 11 is a schematic view of the assembly method of the present application.

[0061] Figure 34 Figure 12 is a schematic view of the assembly method of the present application.

[0062] Figure 35 Figure 13 is a schematic view of the assembly method of the present application.

[0063] Figure 36 Figure 14 is a schematic view of the assembly method of the present application.

[0064] Figure 37 Figure 15 is a schematic view of the assembly method of the present application.

[0065] BRIEF DESCRIPTION OF THE DRAWINGS

[0066] 1 - output member, 21 - first end cap, 22 - second end cap, 3 - input member,

[0067] 4 - mandrel, 41 - limiting surface, 42 - first wire passing groove, 43 - second wire passing groove, 44 - third wire passing groove, 45 - fourth wire passing groove, 46 - seventh mating surface, 47 - notch, 48 - plug,

[0068] 5 - drive mechanism, 51 - control box, 511 - wire passing hole, 512 - first limiting groove, 52 - sealing cap, 53 - shift driving member, 531 - first connecting part, 54 - first end surface,

[0069] 6 - shift control mechanism, 61 - shift control device, 611 - first end, 6111 - second connecting part, 6112 - second open slot, 612 - connecting rod, 613 - second end, 6131 - first open slot, 6A - first control surface, 6B - second control surface, 65 - pawl seat, 651 - second limiting slot, 652 - pawl installation slot, 653 - snap spring slot, 654 - avoidance slot, 655 - first matching surface, 656 - second matching surface, 657 - third matching surface, 658 - fourth matching surface, 659 - fifth matching surface, 6510 - sixth matching surface, 6511 - fifth wire passing slot, 66 - first pawl, 661 - locking part, 662 - control part, 6621 - contact surface, 663 - rotating shaft part, 67 - second pawl, 601 - first gear position angle, 602 - second gear position angle, 603 - third gear position angle,

[0070] 7 - transmission mechanism, 701 - planet carrier, 7011 - input piece installation slot, 7012 - third installation hole, 702 - first sun gear, 7021 - first gear tooth, 7022 - locking slot, 703 - second sun gear, 7031 - second gear tooth, 704 - double planetary gear, 7041 - third gear tooth, 7042 - fourth gear tooth, 705 - ring gear, 7051 - fifth gear tooth, 706 - shaft sleeve, 707 - pin, 708 - pin retainer, 709 - clutch structure,

[0071] 8 - motor module, 81 - stator, 82 - magnet, 83 - motor reduction device, 831 - reduction planet carrier, 832 - reduction planetary gear, 833 - reduction sun gear, 834 - reduction ring gear,

[0072] 9 - control module, 10 - shift operation module, 1101 - first cable, 1102 - second cable, 1103 - third cable, 1104 - fourth cable. DETAILED DESCRIPTION

[0073] The embodiments of the present application will be described in detail below with reference to the drawings, wherein the same or like designations denote the same or like elements or elements having the same or similar functions throughout the whole document. The embodiments described below are exemplary and are only for the purpose of explaining the present application, and should not be understood as limiting the present application.

[0074] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0075] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0076] 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" of 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.

[0077] The disclosure hereafter provides many different implementations or examples for implementing the various structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described hereafter. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various implementations and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0078] The prior art of the present application is described in the invention patent application with the name of an internal motor built-in internal gear hub, bicycle and gear shifting control method, application number CN202310571433.1, filed by the present applicant on May 20, 2023, which is briefly described in the present specification, and some irrelevant content to the present application is deleted.

[0079] Figure 1 The structural schematic diagram of the electric assist bicycle of the prior art of the hand self integrated internal gear hub with built-in motor is shown. As shown in the figure, the prior art of the hand self integrated internal gear hub is woven on the rim of the bicycle rear wheel by spokes, the core shaft 4 of the internal gear hub is clamped into the mounting slot of the rear fork of the bicycle frame, and the threads at both ends of the core shaft 4 are fastened by two nuts respectively, so that the core shaft 4 is fixed with the frame. The internal gear hub needs to be matched with the control module 9 and the gear shifting operation module 10 to control the manual or automatic change of the transmission ratio. The controller, internal gear hub and gear shifting operation module 10 are powered by the power supply built-in the control module 9.

[0080] As Figure 5As shown, the motor module 8 comprises a stator 81 and a magnet 82. The stator 81 comprises a core and coils wound on the core. The core is stacked by a plurality of silicon steel sheets. The motor module 8 is generally a high-speed brushless motor, which has a high rotating speed but a small torque. Therefore, a motor speed reducer 83 is usually added to reduce the rotating speed and increase the torque. In the embodiment, the motor speed reducer 83 is arranged on the right side of the stator 81. The motor speed reducer 83 is a planetary gear speed reduction mechanism, which comprises a speed reduction planetary carrier 831, a speed reduction planetary gear 832 and a speed reduction sun gear 833. The speed reduction sun gear 833 is fixed on the mandrel 4 by a connecting key. The speed reduction planetary gear 832 is rotatably installed on the speed reduction planetary carrier 831. One end of the speed reduction planetary carrier 831 extends to the vicinity of the first end cover 21. The stator 81 is fixedly installed on the mandrel 4. The magnet 82 is in the form of a sheet and arranged radially to the stator 81. A small air gap is reserved between the stator 81 and the magnet 82. Preferably, the magnet 82 is arranged on the inner wall of the speed reduction planetary carrier 831. A small air gap is also reserved between the speed reduction planetary carrier 831 and the output member 1.

[0081] The S poles and N poles of the magnet 82 are alternately arranged along the inner wall of the speed reduction planetary carrier 831. When the coils of the stator 81 are electrified, a strong magnetic field is formed. Under the action of the magnetic field, the magnet 82 generates a rotating torque, which drives the speed reduction planetary carrier 831 to rotate. Since the speed reduction sun gear 833 is fixed, the speed reduction planetary carrier 831 is a driving member and the speed reduction ring gear 834 is a driven member. Since the speed reduction ring gear 834 is fixed to the output member 1, the torque generated by the motor module 8 is transmitted to the output member 1 and then to the wheels to drive the vehicle to move.

[0082] The motor module 8 has an automatic adjustment of the assist force mode. The pedal frequency sensor and the rotating speed sensor continuously send the rotating speed signals of the crank and the wheels to the controller. The controller calculates the size of the pedal frequency, the rotating speed of the wheels and the acceleration of the rotating speed, and automatically controls the adjustment of the assist force. The acceleration intention of the rider is detected by the sensor. The motor module 8 provides a larger output power when the vehicle is moving faster and a smaller output power when the vehicle is moving slower.

[0083] The motor module 8 has a manual adjustment of the assist force mode, such as a no assist mode, a sport mode and a pure assist mode. In the no assist mode, the motor module 8 does not work and the bicycle is driven by human power only. In the sport mode, the motor module 8 provides assist force in proportion to the torque generated by human power. For example, if the human power provides fifty percent of the torque, the motor module 8 also provides fifty percent of the torque. In the pure assist mode, the torque generated by human power is almost zero. The rider only needs to pedal lightly and the motor module 8 can provide full power assist force.

[0084] The button for switching the size of the power assist module can be set as a separate control module 9, or it can be integrated into the shift operation module 10.

[0085] Figure 2 A perspective view of a prior art internally driven, self-driving hub with a built-in motor is shown. The right side of the prior art internally driven, self-driving hub with a built-in motor has an input component 3 fixedly mounted. Input component 3 transmits the torque generated by the rider's pedaling. In a chain drive system, input component 3 is a freewheel; the rider pedals, driving the crank, which in turn rotates the chainring. The chainring, via the chain, drives the freewheel, which in turn rotates the output component 1, propelling the rear wheel forward. In a belt drive system, input component 3 is a rear pulley; the rider pedals, driving the crank, which in turn rotates the front pulley. The front pulley, via the belt, drives the rear pulley, which in turn rotates the output component 1, propelling the rear wheel forward. In a shaft drive system, input component 3 is a bevel gear; correspondingly, the rider outputs torque to the bevel gear via the drive shaft, causing the output component 1 to rotate.

[0086] Figure 3 This shows a front view of a prior art internally variable speed hub with a built-in motor and manual / automatic transmission. Figure 4 The image shows a left view of a prior art internally variable speed hub with a built-in motor for manual and automatic transmissions. Figure 5 It shows Figure 4 A cross-sectional view along line AA. The left side of the internal derailleur hub is the first end cap 21, the middle is the output component 1, and the right side is the second end cap 22. The end caps cooperate with the output component 1 to create a sealed cavity. The cavity houses the motor module 8, drive mechanism 5, shift control mechanism 6, and transmission mechanism 7. A spindle 4 passes through the center of the internal derailleur hub. From left to right, the motor module 8, drive mechanism 5, shift control mechanism 6, and transmission mechanism 7 are mounted on the spindle 4. The spindle 4 has a stepped optical shaft structure. Threads are machined on the outer circumference of both ends of the spindle 4 for fastening to the rear fork of the frame with nuts. An inclined first cable guide groove 42 is machined on the spindle 4 at the mounting position of the motor module 8. The first cable guide groove 42 is used to arrange the cable supplying power to the motor module 8. A second cable guide groove 43 is machined on the center of the spindle 4. The second cable guide groove 43 is used to arrange the cable supplying power to the drive mechanism 5. The spindle 4 is also machined with two limiting surfaces 41, both of which are parallel to the axis of the spindle 4 and are parallel to each other. The function of the limiting surfaces 41 is to assemble the drive mechanism 5 and the shift control mechanism 6, and to limit the movement of the drive mechanism 5 and the shift control mechanism 6. The shift control mechanism 6 is fitted inside the transmission mechanism 7, and the outer side of the transmission mechanism 7 is connected to the output component 1 to transmit torque.

[0087] Figure 6 A perspective view of the prior art drive mechanism 5 is shown. Figure 7Another perspective view of the prior art drive mechanism 5 is shown. Figure 8 An exploded view of the prior art drive mechanism 5 is shown. Figure 9 Another perspective view of the prior art drive mechanism 5 is shown. The prior art drive mechanism 5 of the built-in motor hand self integrated internal speed change hub includes a control box 51, a sealing cover 52 mounted at the opening of the control box 51, and a driving device and a circuit board mounted inside the control box 51. A first limiting groove 512 is formed through the center of the control box 51, and the groove type of the first limiting groove 512 is matched with the longitudinal section where the limiting surface 41 of the mandrel 4 is located, which functions to prevent the control box 51 from rotating after being fitted on the mandrel 4. In order to facilitate the power supply and transmission of control signals of the circuit board, the control box 51 is also provided with a wire hole 511, and the wire hole 511 is located below the first limiting groove 512, and the cable is connected with the circuit board by passing through the wire hole 511 from the outside of the control box 51. The control box 51 forms a certain sealing structure, which can effectively prevent moisture and dust from entering the circuit board and the driving device, and prolong the service life of the driving device.

[0088] A shift driving piece 53 is mounted at the center of the drive mechanism 5 and is hinged thereto, the shift driving piece 53 is linked with the driving device, the driving device outputs torque to make the shift driving piece 53 rotate, and the shift driving piece 53 is provided with a second connecting part 6111 for connecting the shift control mechanism 6.

[0089] Figure 8 A perspective view of the prior art shift control mechanism 6 is shown. The shift control mechanism 6 includes a shift control device 61, a pawl and a pawl seat 65, the pawl is mounted on the pawl seat 65, the shift control device 61 is provided with an open slot, and the shift control device 61 is driven to rotate by the driving device to control the pawl to be regularly retracted and opened.

[0090] As shown in Figure 9 and Figure 10 The shift control device 61 of the prior art includes a first end part 611 provided at one end, and a second end part 613 provided at the other end, and the first end part 611 and the second end part 613 are connected by a connecting rod 612. The first end part 611 is provided with a second connecting part 6111 for facilitating assembly with the drive mechanism 5, and the second connecting part 6111 is matched with the above-mentioned first connecting part 531, that is, the first connecting part 531 is a square-shaped protrusion, and the second connecting part 6111 is a corresponding square-shaped groove, or vice versa, the first connecting part 531 can also adopt a square-shaped groove, and the second connecting part 6111 adopts a corresponding square-shaped protrusion.

[0091] Figure 11 A sectional view of the second end part 613 of the shift control device 61 along the B-B line is shown,Figure 11 A cross-sectional view of the second end portion 613 of the shift control device 61 along the line C-C is shown, the second end portion 613 is provided with a first open slot 6131 on its outer peripheral surface. The inner peripheral surface of the second end portion 613 is a first control surface 6A, and the sidewall of the first open slot 6131 is a second control surface 6B. In this embodiment, the first control surface 6A is a circular arc surface, and the second control surface 6B is an inclined surface. The circular arc surface of the first control surface 6A transitions to the outer peripheral surface of the second end portion 613 through the inclined surface of the second control surface 6B. Both the first control surface 6A and the second control surface 6B are provided to control the opening and closing of the pawls. Figure 12 A cross-sectional view of the first end portion 611 of the shift control device 61 along the line D-D is shown, the first end portion 611 is provided with a second open slot 6112 on its outer peripheral surface.

[0092] In Figure 11 In the above, assuming that there are three straight lines passing through the center of the second end portion 613, the angle between the first straight line and the horizontal line is α, and the angle between the adjacent two straight lines is β. Assuming that the first straight line is the first gear position angle 601, the second straight line is the second gear position angle 602, and the third straight line is the third gear position angle 603. Then, the first gear position angle 601 is α, the second gear position angle 602 is α+β, and the third gear position angle 603 is α+2β.

[0093] By controlling the rotation of the shift control device 61 to different angles, the opening and closing of different pawls are controlled, and different gear positions are switched. Specifically, when the shift control device 61 is rotated to the first gear position angle 601, all the pawls are in the closed state; when the shift control device 61 is rotated to the second gear position angle 602, the second pawl 67 is opened, and the first pawl 66 is closed; when the shift control device 61 is rotated to the third gear position angle 603, the first pawl 66 is opened, and the second pawl 67 is closed.

[0094] Figure 13A perspective view of the pawl seat 65 of the prior art is shown. The pawl seat 65 is a cylindrical structure as a whole, and a second limiting groove 651 is arranged at the center of the pawl seat 65. Like the first limiting groove 512, the groove type of the second limiting groove 651 is adapted to the longitudinal section where the limiting surface 41 of the mandrel 4 is located, and the second limiting groove 651 also serves to prevent the pawl seat 65 from rotating after being fitted on the mandrel 4. Two pawl mounting grooves 652 are arranged above the pawl seat 65, and the first pawl 66 and the second pawl 67 are respectively mounted in the pawl mounting grooves 652. Two snap spring grooves 653 are further arranged on the outer circumferential surface of the pawl seat 65, and the plane where the snap spring grooves 653 are located is perpendicular to the axis direction of the pawl seat 65. The snap spring grooves 653 are provided with snap springs (not shown), and the snap springs are in a contracted state during assembly, thus having a tendency to expand outward, and can exert a tension on the first pawl 66 and the second pawl 67, so as to keep the first pawl 66 and the second pawl 67 expanded outward, and only when a force in a specific direction is applied, the first pawl 66 and the second pawl 67 can be retracted inward.

[0095] The structure of the first pawl 66 is shown in Figure 14 and Figure 15 The first pawl 66 has a locking portion 661, a control portion 662, and a pivot portion 663. The pivot portion 663 is arranged at the bottom of the locking portion 661, and the pivot portion 663 is in a half-cylindrical shape. The pawl mounting groove 652 of the pawl seat 65 is adapted to the shape of the pivot portion 663, and the pivot portion 663 is hinged in the pawl mounting groove 652 to enable the first pawl 66 to rotate about the axis of the pivot portion 663. The locking portion 661 of the first pawl 66 is used to lock or disengage with the gear in the transmission mechanism 7. The control portion 662 of the first pawl 66 protrudes along the thickness direction of the locking portion 661, and one side surface of the control portion 662 is a contact surface 6621. Figure 21 The structure schematic diagrams of the first pawl 66 in two states are shown. When the shift control device 61 is rotated to a specific angle, the first control surface 6A of the shift control device 61 contacts the contact surface 6621 of the control portion 662, the first control surface 6A exerts a pressure on the contact surface 6621 of the control portion 662 in the direction of the center of the pawl seat 65, and the first pawl 66 is forced to retract inward against the tension of the snap springs; when the shift control device 61 is rotated to another specific angle, the first control surface 6A of the shift control device 61 transitions to the second control surface 6B (i.e. the side surface of the open groove) which contacts the contact surface 6621 of the control portion 662, and the pressure of the second control surface 6B on the contact surface 6621 of the control portion 662 gradually decreases, and the first pawl 66 gradually expands outward. In order to prevent the pawl from interfering with the pawl seat 65 after being retracted, the pawl seat 65 is further provided with a relief groove 654.

[0096] Figure 17A structure diagram showing the linkage of the first pawl 66 of the prior art with the first sun gear 702 is shown. The first sun gear 702 is supported by a bearing, and a locking groove 7022 is formed in the center thereof, the groove of the locking groove 7022 is similar to a spline groove, the difference is that the groove wall of the locking groove 7022 expands outward. The groove wall of the locking groove 7022 corresponds to the side wall of the first pawl 66, when the first pawl 66 is retracted inward, the locking portion 661 of the first pawl 66 does not contact the groove wall of the locking groove 7022, and the first sun gear 702 is in a free state; when the first pawl 66 is opened outward, the locking portion 661 of the first pawl 66 abuts against the groove wall of the locking groove 7022, and the first sun gear 702 is in a locked state, that is, the first sun gear 702 cannot rotate counterclockwise. Similarly, the second sun gear 703 is also provided with the same locking groove 7022.

[0097] Figure 18 and Figure 19 A perspective view of the transmission mechanism 7 of the prior art is shown. Figure 20 An exploded view of the transmission mechanism 7 is shown. The transmission mechanism 7 includes at least one planetary gear mechanism and at least one set of clutch structure. In this embodiment, a one-stage planetary gear mechanism is provided, each set of planetary gear includes a sun gear, a planet carrier, a ring gear and at least one planetary gear, and the transmission mechanism 7 specifically includes a planet carrier 701, a first sun gear 702, a second sun gear 703, a double planetary gear 704 and a ring gear 705.

[0098] The overall structure of the planet carrier 701 is a hollow cylindrical structure with a large diameter at the left end and a small diameter at the right end, and the outer peripheral surface of the right end of the planet carrier 701 is provided with an input member mounting groove 7011, and the input member 3 is mounted in the input member mounting groove 7011 and fastened with the planet carrier 701 to transmit the torsion. The inside of the hollow cylindrical structure on the left side of the planet carrier 701 is used to mount the first sun gear 702 and the second sun gear 703.

[0099] The outer peripheral surface of the planet carrier 701 is provided with a mounting groove, and two opposite groove walls of the mounting groove are respectively provided with two third mounting holes 7012, and the double planetary gear 704 is mounted in the mounting groove by passing through the center hole of the double planetary gear 704, the shaft sleeve 706 and the third mounting hole 7012 by the pin 707, and the pin 707 is limited by the pin stop ring 708 at both ends, and the cooperation relationship between the parts is: the pin 707 and the third mounting hole 7012 are interference fit, the center hole of the double planetary gear 704 and the pin 707 are over fit or clearance fit, and the double planetary gear 704 can rotate around its own axis.

[0100] As Figure 21As shown, the double planetary gear 704 has a third gear tooth 7041 and a fourth gear tooth 7042, the third gear tooth 7041 is located at the right side of the fourth gear tooth 7042, the first sun gear 702 and the second sun gear 703 are installed below the double planetary gear 704, the first gear tooth 7021 of the first sun gear 702 is externally meshed with the third gear tooth 7041 of the double planetary gear 704, the second gear tooth 7031 of the second sun gear 703 is externally meshed with the fourth gear tooth 7042 of the double planetary gear 704, and the second gear tooth 7031 of the second sun gear 703 is internally meshed with the fifth gear tooth 7051 of the ring gear 705.

[0101] In the present embodiment, the mounting groove is provided with four, so four double planetary gears 704 can be installed, the number of double planetary gears 704 depends on the actual working condition of the transmission mechanism 7 and the load, generally the greater the load, the greater the number of double planetary gears 704.

[0102] The right side of the planet carrier 701 is also provided with a clutch structure 709, the bottom surface of the clutch structure 709 is connected to the outer circumferential surface of the planet carrier 701, and the top surface of the clutch structure 709 is connected to the inner circumferential surface of the ring gear 705. The clutch structure 709 specifically includes a retainer, rollers, and a working surface that realizes the clutch function, the diameter of the retainer is greater than the diameter of the outer circumferential surface of the planet carrier at the section, and less than the diameter of the inner circumferential surface of the ring gear at the section, the retainer is provided with a plurality of roller limiting grooves 7092, the rollers are assembled in the roller limiting grooves, and the rollers can only rotate around their own axes. The rollers can be cylindrical rollers, balls, etc., and cylindrical rollers are selected in the present embodiment. By setting the clutch structure 709 between the planet carrier 701 and the ring gear 705, the one with high speed can be selected from the planet carrier 701 and the ring gear 705 to transmit torque outward, so as to change the transmission ratio.

[0103] In the prior art built-in motorized manual-automatic internal gear hub, the shift control device 61 of the shift control mechanism 6 is rotated to different angles by the driving mechanism 5, such as from the first gear angle 601 to the second gear angle 602, and the internal gear hub is upshifted from first gear to second gear, or from the second gear angle 602 to the first gear angle 601, and the internal gear hub is downshifted from second gear to first gear. The driving mechanism 5 has two driving modes, one is manual mode, and the other is automatic mode. The driving mode needs to be changed, and the internal gear hub is matched with the shift operation module 10 to achieve. The shift operation module 10 is installed on the bicycle head, and the rider uses his fingers to press the shift operation module 10 for control. The shift operation module 10 has a mode switching button, an upshift button and a downshift button, and the rider presses the mode switching button to switch between manual mode and automatic mode. In manual mode, the rider upshifts by pressing the upshift button and downshifts by pressing the downshift button. In automatic mode, the rider does not need to operate, and the internal gear hub performs the shift operation according to the vehicle speed, for example, when the vehicle speed reaches ten kilometers per hour, it is automatically upshifted from first gear to second gear; for example, when the vehicle speed is reduced to less than ten kilometers per hour, it is automatically downshifted from second gear to first gear. The rider can switch to manual mode to freely change gears according to the actual road conditions, improve the flexibility of riding, and switch to free mode to automatically change gears, improve the comfort of riding.

[0104] Figure 22 And Figure 23 A perspective view of the pawl seat 65 of the present application is shown, Figure 24 A front view of the pawl seat 65 of the present application is shown, and the difference between the pawl seat 65 of the present application and the above-mentioned prior art is that the overall structure of the pawl seat 65 is lengthened, so that the pawl seat 65 forms multiple matching surfaces, so that the pawl seat 65 is more convenient to assemble with the driving mechanism 5, the shift control mechanism 6 and the transmission mechanism 7.

[0105] Specifically, the pawl seat 65 is formed with a first matching surface 655, a second matching surface 656, a third matching surface 657, a fourth matching surface 658, a fifth matching surface 659 and a sixth matching surface 6510 by extending in the axial direction, wherein the first matching surface 655 and the third matching surface 657 are the outer circumferential surfaces of the cylindrical surface of the axial extension of the pawl seat 65, and the first matching surface 655 and the second matching surface 656 are completely consistent in shape except that the lengths are inconsistent, the first matching surface 655 and the third matching surface 657 are used to be sleeved on the inner circumferential surface of the shift driving piece 53 of the driving mechanism 5, and the pawl seat 65 and the driving mechanism 5 are combined into a whole; the second matching surface 656 is arranged on the side surface of the first matching surface 655, and the two matching surfaces are perpendicular to each other, in order to accurately position the pawl seat 65 on the mandrel 4, a seventh matching surface 46 is arranged on the mandrel 4, as shown in the figure, the seventh matching surface 46 is arranged at the shaft shoulder of the mandrel 4 at the corresponding position of the driving mechanism 5, and the seventh matching surface 46 is specifically an end surface, when the pawl seat 65 is inserted into the mandrel 4 along the axial direction of the mandrel 4, the second matching surface 656 of the pawl seat 65 abuts against the seventh matching surface 46 of the mandrel 4, so that the pawl seat 65 can be accurately positioned. The third matching surface 657, the fourth matching surface 658 and the fifth matching surface 659 of the pawl seat 65 are located on the same side, and are all cylindrical surfaces with diameters decreasing in turn, wherein the fourth matching surface 658 is used to sleeve a bearing, the inner hole of the bearing and the fourth matching surface 658 adopt transition fit, the shaft shoulder formed between the third matching surface 657 and the fourth matching surface 658 is used to position the bearing, the outer hole of the bearing and the transmission mechanism 7 adopt transition fit, the sixth matching surface 6510 is located on the side surface of the fifth matching surface 659, and is used to abut against the nut when the nut is finally installed, so as to fasten the pawl seat 65.

[0106] Figure 25 A cross-sectional view along the line D-D in Figure 24 A cross-sectional view along the line E-E in Figure 26 A cross-sectional view along the line E-E in Figure 24 The relief groove 654 arranged in the pawl seat 65 is consistent with the structure of the prior art relief groove 654 in Figure 13 The relief groove 654 arranged in the pawl seat 65 is consistent with the structure of the prior art relief groove 654 in

[0107] In order to better thread, one end of the pawl seat 65 is also provided with a fifth wire passing groove 6511, and the fifth wire passing groove 6511 is specifically arranged at the left end of the pawl seat 65. The fifth wire passing groove 6511 penetrates the second limiting groove 651, and after the pawl seat 65 is installed on the mandrel 4, the opening of the fifth wire passing groove 6511 faces upward, and is in the same vertical direction as the wire hole 511 of the control box 51 and coincides with the third wire passing groove 44 of the mandrel 4. In this way, the cable can be smoothly connected to the circuit board in the control box 51 from the second wire passing groove 43.

[0108] In some embodiments, the pawl seat 65 can be integrated or split. The split pawl seat 65 is easier to process, but the assembly accuracy is slightly reduced.

[0109] In the prior art, as shown in Figure 5 The assembly method of the prior art built-in motor internal gear hub is to weld the cable (thick wire) of the motor part first, then lead the cable out from the first wire slot 42, then weld the cable at the driving mechanism 5 with the circuit board, and then lead the cable out from the second wire slot 43 to the right end of the mandrel 4. As can be seen, the assembly method of the prior art built-in motor internal gear hub can only lead the cable out from both ends of the mandrel 4, which results in more assembly processes and relatively messy cables, which is not only not beautiful, but also not convenient for wiring with external equipment.

[0110] Therefore, in this application, in addition to the first wire slot 42 and the second wire slot 43 of the prior art, a third wire slot 44 is provided in the middle of the second wire slot 43, and a fourth wire slot 45 is provided at the left end of the second wire slot 43, as shown in Figure 29 and Figure 30 The third wire slot 44 penetrates the middle of the second wire slot 43 in the vertical direction and communicates with the wire hole 511 of the control box 51; the fourth wire slot 45 penetrates the left end of the second wire slot 43 in the vertical direction and communicates with the first wire slot 42. Among them, the first wire slot 42 is used to connect the cable for connecting the motor, and the cable at the motor generally uses a nine-core cable, of which six cores are used for motor power supply and control, and the other three cores are separated and then sequentially passed through the fourth wire slot 45 and the second wire slot 43 and led out to the right end of the mandrel 4; and the cable at the control box 51 is first passed through the wire hole 511 of the control box 51 and the fifth wire slot 6511 of the pawl seat 65, and then passed through the third wire slot 44 of the mandrel 4 and led out to the right end of the mandrel 4 before being assembled into the hub. Finally, the cable is closed in the mandrel 4, so a notch 47 is provided at one end of the mandrel 4, and a plug 48 is assembled at the notch 47. The plug 48 generally uses a soft rubber plug and has a certain deformation ability to prevent water from entering, and the plug 48 can also avoid the shielding effect of metal on the signal.

[0111] The application also provides an assembly method of an internal gear hub, which specifically includes the following steps:

[0112] Step one:

[0113] According to the assembly principle of mechanical parts, it is necessary to follow a certain order to ensure that the parts are assembled correctly and the matching relationship is reasonable. Generally, major parts are assembled first, followed by minor parts; high-precision parts are assembled first, followed by low-precision parts; large parts are assembled first, followed by small parts; external parts are assembled first, followed by internal parts. Since the motor module 8 has high assembly precision requirements and is large in size, it belongs to major parts, so in this embodiment, the motor part is assembled first, and the reference Figure 31 and Figure 32 , specifically including assembling the motor module 8 with the mandrel 4 and the output 1, specifically including fixing the stator 81 of the motor module 8 to the mandrel 4 through a flat key, and controlling the coaxial tolerance between the inner hole of the stator 81 and the mandrel 4 to be within 0.01 mm; fixing the outer peripheral surface of the reduction gear ring 834 of the motor module 8 to the inner peripheral surface of the corresponding position of the output 1, and controlling the coaxial tolerance between the outer peripheral surface of the reduction gear ring 834 and the inner peripheral surface of the corresponding position of the output 1 to be within 0.01 mm, to complete the assembly of the motor part.

[0114] Take the first cable 1101, one end of the first cable 1101 is a quick release connector for quick connection or quick disconnection with the control module 9, the other end of the first cable 1101 is connected to the motor module 8, and a part of the wire core of the first cable 1101 is connected to the circuit board of the motor module 8; take the second cable 1102, one end of the second cable 1102 is connected to the other part of the wire core of the first cable 1101, and the other end of the second cable 1102 is led out through the fifth wire slot to the gap 47 of the mandrel 4; in this embodiment, the first cable 1101 needs to transmit more than 400W of direct current, so a nine-core cable is used, of which six cores are used for motor power supply and control, and the other three cores are used for power supply and control to the control box 51. The three-core cable is connected to the second cable 1102, and then passes through the fourth wire slot 45 to lead out to the gap 47 of the mandrel 4. The wiring process of the motor part is completed, and the first end cover 21 is fastened to the output 1 by screws.

[0115] Step two:

[0116] Assemble the inner variable speed part,

[0117] First, assemble the pawl seat 65 with the pawl and shift control device 61 of the shift control mechanism 6, and then assemble the pawl seat 65 with the drive mechanism 5, the transmission mechanism 7, and the second end cover 22, respectively, as shown in Figure 33 .

[0118] In this step, the pawl seat 65 is assembled with other parts of the shift control mechanism 6 as a whole, that is, other parts of the shift control mechanism 6 such as the first pawl 66, the second pawl 67, the snap spring and the shift control device 61 are assembled to the corresponding positions of the pawl seat 65. During the assembly of the pawl seat 65 with the driving mechanism 5 and the transmission mechanism 7, the first matching surface 655 of the pawl seat 65 can be used as a positioning reference, and the driving mechanism 5 is sleeved on the first matching surface 655 of the pawl seat 65 to position the pawl seat 65 in the circumferential direction. The outer peripheral surface of the shift driving piece 53 of the driving mechanism 5 forms a transition fit or interference fit with the first matching surface 655 of the pawl seat 65, and the coaxial tolerance is controlled within 0.05 mm.

[0119] After sleeving, force is applied to the pawl seat 65 to move it towards the end surface of the driving mechanism 5 until the second matching surface 656 of the pawl seat 65 is flush with the end surface of the control box 51. Here, flush means that the flatness tolerance between the second matching surface 656 of the pawl seat 65 and the end surface of the driving mechanism 5 is controlled within 0.01 mm.

[0120] Then, the transmission mechanism 7 is sleeved on the fourth matching surface 658 of the pawl seat 65 to position the pawl seat 65 in the circumferential direction with the fourth matching surface 658 of the pawl seat 65 as a positioning reference. Since the transmission mechanism 7 can rotate relative to the pawl seat 65, the pawl seat 65 also needs to be installed with a bearing capable of supporting the transmission mechanism 7. Specifically, the bearing is sleeved on the fourth matching surface 658 of the pawl seat 65, and the bearing is positioned by the shoulder formed by the third matching surface 657 and the fourth matching surface 658. The pawl seat 65 sleeved with the bearing is sleeved with the transmission mechanism 7 to indirectly position the pawl seat 65 in the circumferential direction by the transmission mechanism 7.

[0121] The transmission mechanism 7, the second end cover 22 and the output member 1 rotate synchronously, so the transmission mechanism 7 needs to be fixedly matched with the second end cover 22. Specifically, the outer peripheral surface of the gear ring 705 is interference-fitted with the corresponding inner peripheral surface of the second end cover 22.

[0122] After the pawl seat 65, the driving mechanism 5 and the transmission mechanism 7 are assembled as a whole, the control box 51 in the driving mechanism 5 should be wired. The sealing cover 52 of the driving device is opened, the third cable 1103 is taken out, the third cable 1103 is sequentially inserted through the wire hole 511 of the control box 51 and the fifth wire slot 6511 of the pawl seat 65, one end of the third cable 1103 is connected with the circuit board of the control box 51, and the other end of the third cable 1103 is suspended for subsequent assembly.

[0123] Step three:

[0124] The third cable 1103 is placed into the third wire slot 44 and led out to the gap 47. The combination of the motor part and the combination of the inner gear part are assembled. The second end cover 22 is fastened to the output 1. The ends of the second cable 1102 and the third cable 1103 are cut to the same length, and the second cable 1102 and the third cable 1103 are connected. Finally, the plug 48 is used to close the gap 47. Figure 34 、 Figure 35 and Figure 36 , as follows:

[0125] The third cable 1103 is placed into the third wire slot 44 and led out to the gap 47. The combination of the motor part and the combination of the inner gear part are assembled. In the assembly process, the combination of step one is first clamped using a clamp, and then the second limiting groove 651 of the pawl seat 65 is inserted from the right end of the mandrel 4. A leftward force is applied to the combination of step two, so that the second matching surface 656 of the pawl seat 65 abuts against the seventh matching surface 46 of the mandrel 4, and the parallelism tolerance is controlled within 0.1 mm.

[0126] In the above process, as the straight-line distance from the second limiting groove 651 of the pawl seat 65 to the third wire slot 44 of the mandrel 4 continuously decreases, in order to prevent the third cable 1103 from being stacked or broken, the third cable 1103 needs to be constantly pulled towards the gap 47 to maintain a taut state. Finally, the ends of the second cable 1102 and the third cable 1103 are cut to the same length, and the second cable 1102 and the third cable 1103 are connected. This can be done by welding or installing a terminal block. Then, a heat shrink tube is sleeved on the cable. When using a heat shrink tube, heating is usually required to trigger its shrinkage effect. A heat gun, a hair dryer or other heating devices can be used for heating. After heating, the heat shrink tube tightly wraps around the surface of the cable, forming a firm and sealed protective layer.

[0127] The second end cover 22 is fastened to the output 1 by screws, and finally the plug 48 is used to close the gap 47, forming a sealed structure, completing the assembly process of the entire inner gear hub.

[0128] The inner variable speed hub can be connected to the control box 51 through wired connection or wireless connection. The wired connection means that the second cable 1102 has a separate signal line to control the controller, while the wireless connection needs to additionally add a wireless communication module without a separate signal line. The wireless communication module can be a Wi-Fi module, a Bluetooth module, a Zigbee module, a LoRa module, an NB-IoT module, a 4G / 5G module, etc. A low-power, short-range wireless channel is established between the wireless communication module and the master control unit arranged in the control module 9 to real-time transmit and receive the gear shifting instructions to control the inner variable speed hub gear shifting. Since the entire inner variable speed hub is made of metal material, the wireless signal is shielded. Therefore, in some embodiments, a fourth cable 1104 can be additionally arranged, as shown in Figure 37

[0129] As can be seen from the above, the pawl seat 65 provided by the present application is formed with a plurality of matching surfaces, which can axially and circumferentially position the pawl seat 65. When assembling the inner variable speed part, the pawl seat 65 can reduce the assembly process and improve the assembly precision, effectively avoiding the problems of defective products, failures or unstable performance caused by assembly errors, and improving the quality and reliability of the product. By improving the assembly precision, unnecessary inspection and repair processes can be avoided, and the production cost can be reduced. Since the assembly parts are more accurately matched and aligned, the assembly speed can also be improved, thereby increasing the production efficiency and yield. The assembly method of the inner variable speed hub provided by the present application assembles the motor part with high assembly precision first, then assembles the inner variable speed part with low assembly precision, and finally assembles the whole, thereby improving the assembly precision. The assembly method also adopts a unique cable arrangement method, which can avoid cable stacking or breaking, and make the cables uniform from one end, which is more beautiful and convenient for wiring with external equipment.

[0130] In the description of the present specification, the description of the terms "one embodiment", "certain embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0131] ​The above merely describes some embodiments of the present application. For those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the protection scope of the present application.

Claims

1. A pawl seat, characterized by, The center of the pawl seat (65) is provided with a second limiting groove (651), and the outer peripheral surface of the pawl seat (65) is further provided with a pawl mounting groove (652), the pawl is mounted in the pawl mounting groove (652), the pawl has two states of outward opening and inward closing, the pawl seat (65) is formed with a plurality of matching surfaces for axial positioning and circumferential positioning of the pawl seat (65), and the plurality of matching surfaces of the pawl seat (65) include a second matching surface (656), which cooperates with the matching surface of the mandrel (4) to axially position the pawl seat (65).

2. The pawl seat according to claim 1, characterized in that The plurality of matching surfaces of the pawl seat (65) include a first matching surface (655), which cooperates with the matching surface of the driving mechanism (5) to circumferentially position the pawl seat (65).

3. The pawl seat according to claim 1 or 2, characterized in that The plurality of matching surfaces of the pawl seat (65) include a fourth matching surface (658), which cooperates with the matching surface of the transmission mechanism (7) to circumferentially position the pawl seat (65).

4. The pawl seat according to claim 3, characterized in that The first matching surface (655) and the fourth matching surface (658) are cylindrical surfaces.

5. The pawl seat according to claim 1, wherein The outer peripheral surface of the pawl seat (65) is further provided with a circlip groove (653), and a circlip is mounted in the circlip groove (653), the circlip keeps the pawl outwardly open.

6. The pawl seat according to claim 1, wherein The outer peripheral surface of the pawl seat (65) is further provided with a relief groove (654).

7. The pawl seat according to claim 1, wherein The pawl mounting groove (652) is provided with two groups.

8. The pawl seat of claim 1, wherein, One end of the pawl seat (65) is provided with a fifth wire passing groove (6511) in communication with the second limiting groove (651).

9. The pawl seat according to claim 1, wherein The pawl seat (65) is split type.

10. A method of assembling an internally geared hub comprising a pawl carrier according to any one of claims 1 to 9, characterised in that, The method comprises the following steps: Assembling the motor part, assembling the motor module (8) with the mandrel (4) and the output member (1) respectively, taking a first cable (1101), one end of the first cable (1101) being a quick release connector, the other end of the first cable (1101) being connected to the motor module (8), a part of the wire core of the first cable (1101) being connected with the circuit board of the motor module (8), taking a second cable (1102), one end of the second cable (1102) being connected with the other part of the wire core of the first cable (1101), the other end of the second cable (1102) being led out to the gap (47) of the mandrel (4) through the fifth wire passing groove (6511), and fastening the first end cover (21) to the output member (1); The inner gear shifting part is assembled by firstly assembling the pawl seat (65) with the pawl of the gear shifting control mechanism (6) and the gear shifting control device (61), then assembling the pawl seat (65) with the driving mechanism (5) and the transmission mechanism (7) respectively, and after the assembly, making the second matching surface (656) of the pawl seat (65) flush with the first end surface (54) of the driving mechanism (5), fixing the transmission mechanism (7) with the second end cover (22), taking the third cable (1103), and sequentially passing the third cable (1103) through the wire passing hole (511) of the control box (51) and the fifth wire passing groove (6511) of the pawl seat (65), and connecting one end of the third cable (1103) with the circuit board of the control box (51); The third cable (1103) is placed into the third wire passing groove (44) and led out at the notch (47), the combination of the motor part and the combination of the inner gear shifting part are assembled, the second end cover (22) is fastened with the output (1), the ends of the second cable (1102) and the third cable (1103) are cut short and flush, the second cable (1102) and the third cable (1103) are connected, and finally the plug (48) seals the notch (47).

11. The method of assembling an internally geared hub as defined in claim 10, wherein, The assembling step of the pawl seat (65) with the driving mechanism (5) comprises: The driving mechanism (5) is sleeved on the first matching surface (655) of the pawl seat (65) to position the pawl seat (65) circumferentially with the first matching surface (655) of the pawl seat (65) as the positioning reference.

12. The method of assembling an internally geared hub as defined in claim 10, wherein, The assembling step of the pawl seat (65) with the transmission mechanism (7) comprises: The transmission mechanism (7) is sleeved on the fourth matching surface (658) of the pawl seat (65) to position the pawl seat (65) circumferentially with the fourth matching surface (658) of the pawl seat (65) as the positioning reference.

13. The method of assembling an internally geared hub as defined in claim 10, wherein, The assembling step of the combination of the motor part and the combination of the inner gear shifting part comprises: The second matching surface (656) of the pawl seat (65) is abutted against the seventh matching surface (46) of the mandrel (4) to axially position the pawl seat (65).

14. The method of assembling an internally geared hub as defined in claim 10, wherein, The fourth cable (1104) is connected to the circuit board of the control box (51), the fourth cable (1104) is used for receiving communication signals, and the fourth cable (1104) is arranged in the same way as the third cable (1103).

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