TW201831803A - Clutch control mechanism and inner transmission having the same - Google Patents

Abstract

A clutch control mechanism and an inner transmission having the same are provided. The clutch is controlled by a control seat arranged on a shaft, a control rod and a control sleeve and no other structures are required, therefore a process difficulty of shaft parts is decreased. Meanwhile, the assembling manner between the control seat and the control rod and between the control rod and the control sleeve is convenient and the cost of the inner transmission having the clutch control mechanism is decreased. In the inner transmission, the clutch at the same time controls the separation and reunion between a planet carrier and an annular gear and between the annular gear and a hub, therefore an inner structure of the transmission is simplified and the inner transmission is further lightened which facilitates the popularization and application of the inner transmission.

Description

 Clutch control mechanism and internal transmission of the same  

The invention belongs to a transmission, and in particular to a clutch control mechanism and an internal transmission thereof.

The internal transmission controls the clutch transmission between the inside of the transmission system and the hub through the clutch to realize the speed ratio control of different gears. Since the internal transmission is completely enclosed inside the hub, the required assembly structure is more complicated, resulting in difficulty in processing parts and high production cost. And the shift control end is located at the outer end of the transmission and is easily damaged by external force.

An improved internal transmission hub axle and an internal transmission having the same thereof as disclosed in Chinese Patent Application No. 03204051.2, wherein the control of the clutch included includes an inner and outer sleeve fitted on the hub axle, through the kit The processing of the shaped transparent through-hole path realizes the axial clutch movement of the clutch through the matched positioning pin, and the processing method of the kit is complicated. In the assembly process, the positioning pin and the kit need to be assembled together and then assembled on the hub axle, and the assembly is difficult. The transmission method of the positioning pin is easy to wear, resulting in a limited service life of the internal transmission.

As the use of internal transmissions on bicycles is becoming more widespread, it is increasingly important to reduce the production costs and assembly challenges of internal transmissions.

The technical problem to be solved by the present invention is to provide a novel clutch control mechanism and an internal transmission thereof for the defects of complicated processing and high production cost existing in the conventional internal transmission clutch control structure.

The invention adopts the following technical solution: the clutch control mechanism, the clutch rotates and slides on the shaft, and the clutch is provided with two sets of clutch structures, wherein one set of clutch structure is drivingly connected with one transmission component, and the other set of clutch structure and The other transmission component is detachably connected, and the control mechanism comprises a control sleeve, a control rod and a control seat, the control sleeve and the control seat are respectively fitted on the shaft, and the control sleeve and the clutch are axially positioned and connected And a freely rotatably assembled between the control sleeve and the clutch, the control seat being rotatably mounted on the shaft and coupled to a control actuator that effects circumferential rotation along the shaft, the lever being slidably disposed along the axis of the shaft, One end is axially positioned and connected to the control sleeve, and the other end is in contact with the control cam surface provided on the rotating circumference of the control seat.

Further, the control sleeve is embedded in the inner hole of the clutch, and the outer wall of the control sleeve is provided with a flange, one side of the flange abuts the axial positioning step of the inner wall of the clutch, and the other side An axial positioning connection is achieved between the axial positioning steps through the axial positioning members.

Further, the control sleeve is provided with a positioning hole, and the control rod is provided with a positioning protrusion embedded in the positioning hole, and the positioning hole and the positioning protrusion are assembled and assembled to realize the control rod and the control sleeve. Axial positioning connection between the cylinders.

Further, the distal end of the control sleeve connecting the control rod is connected to the shoulder on the shaft through the compressed spring.

Further, the shaft is provided with an axial sliding groove, and the control rod is slidingly embedded in the sliding groove.

The internal transmission includes a planetary gear train housed inside the hub, and a clutch disposed between the power input base and the planet carrier of the planetary gear train, the clutch applying the above-described clutch control mechanism of the present invention; in addition, the planetary gear The inner ring gear is engaged with the inner wall of the hub through the first pawl, and the inner ring gear is further engaged with the power input seat through the second pawl, and the planet carrier is coupled to the inner wall of the hub through the third pawl; The first pawl, the second pawl and the third pawl are maintained in a pop-up state by a compression spring, and the clutch is provided with a slope structure for controlling the depression of the first pawl.

Further, the center wheel of the planetary gear train is integrated with the shaft.

Further, a coupling end is formed between the one end of the clutch and the power input base through a sliding jaw structure, and the other end of the clutch forms a clutch fit with the carrier through the jaw clutch structure; the slope structure is The clutch and the carrier are in contact with the first pawl during the separation process, and the first pawl is controlled to cooperate with the inner wall of the hub.

Further, the intermediate position of the first pawl is disposed on the inner ring gear through the pin shaft, and the outer end of the first pawl is elastically fitted to the ratchet groove of the inner wall of the hub through the compression spring, and the other end is passed through the inner end. The ring gear is in contact with the ramp structure of the clutch.

In the present invention, the control actuator of the clutch control mechanism includes a cable holder disposed at an outer end of the hub, the cable holder is rotatably fitted at the end of the shaft, and is coaxially rotated and assembled with the control seat, the control seat is transmitted through The mounting sleeve is rotatably mounted on the shaft.

Further, the control actuator further includes a drawstring guide plate fixedly mounted on the shaft through the guide plate mount, the guide plate mount being axially fixed to the shaft through a fixing nut, The guide plate mounting seat is located in the inner ring of the cable holder, the cable guide plate is fixed circumferentially with the guide plate mounting seat, and is axially fixed through the axial snap ring, and the cable seat is rotatably mounted on the guide plate. On the seat, the pull cord connecting the gears to control the power component is connected to the drawstring seat through the drawstring guide.

The invention adopts a shaft-mounted control seat, a control rod and a control sleeve to control the clutch, and does not need to process other structures on the shaft, thereby reducing the processing difficulty of the shaft parts, and at the same time between the control seat and the control rod, the control rod and the control The assembly between the sleeves is more convenient, reducing the cost of the internal transmission using the clutch control mechanism. In the internal transmission, the clutch simultaneously controls the clutch control between the carrier and the ring gear and between the ring gear and the hub. The simplification of the internal structure of the transmission further improves the lightness of the internal transmission and is beneficial to the promotion and application of the internal transmission.

The invention will be further described below in conjunction with the drawings and specific embodiments.

1‧‧‧Clutch

101‧‧‧First clutch structure

102‧‧‧Second clutch structure

103‧‧‧Slope structure

1031‧‧‧Low-dimensional surface

1032‧‧‧High level

104‧‧‧Axial positioning steps

11‧‧‧Control sleeve

111‧‧‧Flange

112‧‧‧Positioning holes

12‧‧‧Control lever

121‧‧‧Promoting the end

122‧‧‧Positioning bumps

13‧‧‧Control seat

131‧‧‧Control cam surface

14‧‧‧ Spring

15‧‧‧Axial positioning parts

21‧‧‧ Inner ring gear

211‧‧‧First pawl

212‧‧‧second pawl

213‧‧‧ Third pawl

22‧‧‧ planet carrier

23‧‧‧Center wheel

3‧‧‧Axis

301‧‧‧ shoulder

302‧‧‧Axial chute

303‧‧‧Rotating installation section

4‧‧‧花鼓

401‧‧‧thorn slot

41‧‧‧Bead frame assembly

5‧‧‧Power input seat

6‧‧‧Control execution components

61‧‧‧Drawing rope seat

62‧‧‧Blue rope guide plate

63‧‧‧ Guide plate mount

64‧‧‧Control torsion spring

65‧‧‧Installation sleeve

66‧‧‧Axial snap ring

67‧‧‧ fixing nut

Fig. 1 is a schematic view showing the assembly of a clutch control mechanism in the embodiment.

2 is an exploded perspective view of the clutch control mechanism in the embodiment.

Fig. 3 is a schematic view showing the on-axis assembly of the clutch control mechanism and the clutch in the embodiment.

Fig. 4 is a schematic view showing the structure of the shaft in the embodiment.

Fig. 5 is a schematic view showing the assembly of the internal transmission applied in the embodiment.

Figure 6 is a schematic view showing the state of the first gear of the internal transmission in the embodiment.

Fig. 7 is a schematic view showing the state of the first pawl of the internal transmission in the first gear position in the embodiment.

Fig. 8 is a schematic view showing the state of the second gear of the internal transmission in the embodiment.

Figure 9 is a schematic view of the first pawl state of the internal transmission in the second gear in the embodiment.

Figure 10 is a schematic view showing the state of the third gear position of the internal transmission in the embodiment.

Figure 11 is an exploded perspective view of the control actuator of the internal transmission in the embodiment.

Number in the figure:

1-clutch, 101-first clutch structure, 102-second clutch structure, 103-slope structure, 1031-lower surface, 1032-high plane, 104-axial positioning step, 11-control sleeve, 111-convex Edge, 112-positioning hole, 12-control lever, 121-push end, 122-positioning bump, 13-control seat, 131-control cam surface, 14-spring, 15-axis positioning member, 21-internal tooth Ring, 211 - first pawl, 212 - second pawl, 213 - third pawl, 22 - planet carrier, 23 - center wheel, 3-axis, 301 - shoulder, 302 - axial chute, 303 - Rotating mounting section, 4-flower drum, 401-thorn groove, 41-bead frame assembly, 5-power input base, 6-control actuator, 61-drawing seat, 62-drawing guide, 63-guide plate mounting Seat, 64-control torsion spring, 65-mounting sleeve, 66-axial snap ring, 67-fixing nut.

Example 1

Referring to FIG. 1 , FIG. 2 and FIG. 3 , the clutch 1 in this embodiment is a jaw clutch mounted on a shaft, and the clutch 1 is rotatably mounted on the shaft 3 , and a control sleeve 11 is mounted on the inner ring of the clutch 1 . The control rod 12, the control seat 13, the spring 14 and the axial positioning member 15 are used to control the linear movement of the clutch 1 along the axial direction of the shaft 3 to realize the clutching action without affecting the clutch directly transmitting the rotational power to the two transmission members. .

Specifically, the control sleeve 11 and the clutch 1 are coaxially fitted on the shaft 3, and the control sleeve 11 is axially slidable relative to the shaft 3 and the clutch 1. The control sleeve 11 is a sleeve member having a stepped structure flange 111. The control sleeve 11 is assembled between the inner ring of the clutch 1 and the shaft 3, and a stepped end surface of the through flange 111 is in contact with the axial positioning step 104 of the inner ring of the clutch 1 to realize an axis between the clutch 1 and the control sleeve 11. Positioning in the direction, a groove for assembling the axial positioning member 15 is further disposed on the inner ring of the clutch 1. The axial positioning member 15 can be an axial positioning snap ring, and the other is disposed through the axial positioning member 15 and the flange 111. An end face contact realizes the positioning of the other axial direction between the clutch 1 and the control sleeve 11, and finally achieves a direct reliable axial positioning of the clutch 1 and the control sleeve 11, that is, the control sleeve 11 can control the clutch 1 along the shaft The axial direction of 3 is slipped left and right. At the same time, a clearance fit is used between the outer ring of the control sleeve 11 and the inner ring of the clutch 1, and between the flange 111 and the axial positioning step 104 of the clutch 1 and the axial positioning member 15, to realize the clutch 1 and the control sleeve. The free-rotation assembly between 11 means that the control sleeve 11 does not affect the rotational transmission of the clutch 1 itself.

The control seat 13 is a rotary member that is rotatably mounted on the shaft 3. A control cam surface 131 having a height difference is provided on the rotation circumference of the control seat 13, and the control cam surface 131 is disposed at a rotary end surface opposite to the control sleeve 11. The vertical distance between the point on the control cam surface 131 and the control sleeve 11 is changed through the height difference on the control cam surface 131, and the control seat 13 is pushed and controlled by the control rod 12 axially slidably positioned on the shaft 3. The sleeve 11 slides axially, which in turn drives the clutch 1 to move axially.

The control rod 12 is a rod-shaped member, and the two ends are connected to the control sleeve 11 and the control seat 13, respectively. Specifically, the end of the control rod 12 near the control seat 13 is a pushing end portion 121 of the round head. The pushing end portion 121 is in contact with the control cam surface 131 of the control seat 13 and forms a cam pair fit with the control seat 13. A positioning protrusion 122 is disposed on the inner end of the control sleeve 11 corresponding to the control rod 11 . Correspondingly, a positioning hole 112 is disposed in the inner ring of the control sleeve 11 , and the positioning protrusion 122 is engaged with the positioning hole 112 to control the lever 12 and An axial positioning connection is realized between the positioning sleeves 11. The control cam surface 131 pushes the axial movement of the control rod 12 along with the rotation of the control seat 13, and drives the control sleeve 11 to linearly slide.

Referring to FIG. 4, the shaft 3 is provided with a rotary mounting section 303 for rotating the assembly control sleeve 11, the diameter of the rotary mounting section 303 being larger than the outer diameter of the shaft section of the one end mounting control seat 13, on the rotating mounting section 303 An axial sliding slot 302 is defined in the axial direction, and the control rod 12 is slidably embedded in the axial sliding slot 302, so that the control rod 12 is slidably restricted along the axial direction of the shaft 3, and the control rod 12 is partially embedded in the shaft 3. The installation prevents the control rod 12 from occupying too much space in the inner ring of the control sleeve 11, and can effectively reduce the radial size of the inner ring.

The control sleeve 11, the control rod 12 and the control seat 13 cooperate to drive the clutch from right to left in Fig. 3, and the compressed spring 14 is used to push the clutch axially back from left to right. A shaft shoulder 301 is disposed on the shaft 3 of the control sleeve 11 away from the end of the control seat 13, and a compression spring 14 is disposed between the shoulder 301 and the control sleeve 11, and the compressed spring 14 functions as a control seat 13 After the control sleeve 11 is pushed to the left, the control sleeve 11 is driven back to the right.

Referring to Figures 5 and 1-4, the illustrated internal transmission is a preferred embodiment of the clutch and clutch control mechanism of the present embodiment, including a planetary gear train, a clutch 1, a shaft 3, a hub 4, and a power input base 5. And controlling the actuator 6, the shaft 3 is a wheel axle, the planetary gear is packaged between the shaft 3 and the hub 4, and the power input base 5 is connected to the power input end of the planetary gear train through the clutch 1 through the clutch 1 to control the power input seat 5 And the power input of the planetary gear train and the pawl clutch control of the planetary gear train, the control actuator 6 is used to control the control seat in the clutch control mechanism.

Specifically, the planetary gear train in this embodiment includes an inner ring gear 21, a first pawl 211, a second pawl 212, a carrier 22, a center wheel 23, and a plurality of planet wheels. The inner ring of the inner ring gear 21 is assembled through a single transmission between the second pawl 212 and the power input base 5, and the power input base 5 is connected with a power input transmission member externally connected to the internal transmission, such as a flywheel, and the inner ring gear 21 transmits through A pawl 211 is unidirectionally coupled with the inner wall of the hub 4, and the outer ring of the carrier 22 is unidirectionally coupled with the inner portion of the hub 4 through the third pawl 213. The one-way transmission coordination referred to in this embodiment is The direction of the drive to which the wheel that drives the hub 4 is rotated forward. Here, the first pawl 211, the second pawl 212, and the third pawl 213 are all assembled through the compression spring, and maintain the initial state in a pop-up state (ie, a state of one-way transmission), specifically how to assemble the spine through the compression spring. The claw is a common technical means in the internal transmission, and the embodiment will not be described herein.

The power input end of the planetary gear train may be the inner ring gear 21 or the carrier 22 depending on the gear position. The clutch 1 in this embodiment is disposed between the power input base 5 and the carrier 22, see FIG. 2 again. The clutch 1 of the present embodiment is respectively provided with a first clutch structure 101 and a second clutch structure 102 at two ends, wherein the first clutch structure 101 is a plurality of protrusions disposed on the circumference of the clutch end face, and the inner ring of the carrier 22 The plurality of grooves provided on the end surface are fitted to each other to be separated and combined with the jaw-type clutch structure. The second clutch structure 102 is a plurality of protrusions disposed on the outer circumference of the other end surface of the clutch, and is disposed on the inner circumference of the power input base 5 A plurality of axial grooves are slidingly fitted to form a sliding jaw structure in a normally combined state. During the separation or combination of the first clutch structure 101 and the carrier 22, the second clutch structure 102 is always powered by the power input base 5. status.

The clutch 1 of the present embodiment is engaged with the carrier by the inner ring gear 21, and the outer ring of the clutch 1 is further provided with a circumferentially disposed ramp structure 103. The outer diameter of the clutch on one side of the ramp structure 103 is larger than the other side. The outer diameters are connected to each other through the ramp structure 103, and a low plane 1031 (larger clutch outer diameter) and a high plane 1032 (smaller clutch outer diameter) are formed on both sides of the ramp structure 103, and the ramp structure 103 In contact with the first pawl 211 provided between the ring gear 21 and the hub 4, the first pawl 211 can be controlled to change from the pop-up state to the depressed state.

As shown in FIG. 7 and FIG. 9, the intermediate position of the first pawl 211 is rotatably disposed on the inner ring gear 21 through the pin shaft, and the outer ratchet end of the first pawl 211 springs up against the inner wall of the hub through the compression spring. The slot is fitted to form a one-way transmission, and the inner side is in contact with the outer diameter of the clutch through the ring gear 21, and the first pawl 211 is moved by the lever through the change between the upper surface and the lower surface of the two ends of the ramp structure 103. The outer side is pressed to separate the inner ring gear 21 and the hub 4 from each other.

This embodiment is a three-speed internal transmission, and it is not necessary to control the center wheel 23, and the center wheel 23 is fixedly assembled with the shaft 3. In order to save assembly costs, the center wheel 23 can be integrally formed on the shaft 3.

The gear transmission state of the three-speed internal transmission of the present embodiment will be described in detail below with reference to Figs.

When the lower position of the control cam surface of the control seat 13 is in contact with the control lever, the control sleeve 11 and the clutch 1 are pushed to the right by the action of the spring 14, and the clutch 1 and the carrier 22 are in a power-disengaged state, and The upper surface 1032 of the ramp structure 103 of the clutch is in contact with the inner side of the first pawl 211, and the first pawl 211 is controlled to be in a depressed state, so that the inner ring gear 21 and the hub 4 are in a dynamic separation state. The power input base 5 enters and is transmitted to the ring gear 21 through the second pawl 212. The inner ring gear 21 transmits the rotational power to the planetary gear train for deceleration transmission, and then is outputted from the carrier 22 to the hub 4 via the third pawl. The wheel that drives the hub connection rotates, the gear is at a low speed, and the power transmission path is as indicated by an arrow in FIG. 6, and the state of the first pawl 211 is as shown in FIG.

When the intermediate position of the control cam surface of the control seat 13 is in contact with the control lever, the control seat 13 pushes the control sleeve 11 through the control lever 12 to the left side of the carrier, and the clutch 1 and the carrier 22 are still separated. However, during the movement of the clutch 1 to the left, the position where the outer ring of the clutch 1 is in contact with the inner side of the first pawl 211 is changed from the upper surface 1032 to the lower surface 1031 via the ramp structure 103, and the inner side of the first pawl 211 is lost. The limitation of the clutch is bounced under the action of the self-compressing spring, and the change between the ring gear 21 and the hub 4 is a one-way power transmission state. At this time, the power is entered by the power input base 5 and transmitted directly through the first pawl 211. To the output of the hub 4, the wheel that drives the hub is rotated, the gear is the direct gear, the rotation speed of the hub 4 exceeds the rotation speed of the carrier 22, and the third pawl 213 is overtaken, and the power transmission path is as indicated by the arrow in FIG. The state of the first pawl 211 is as shown in FIG.

The high position of the control cam surface of the block control seat 13 is in contact with the control rod, and the control seat 13 continues to push the control sleeve 11 to the left side of the planet carrier through the control rod 12 to change the clutch 1 and the carrier 22 into a coupled state. When the inner side of the first pawl 211 is kept in contact with the lower surface of the outer ring of the clutch 1, the inner ring gear 21 and the hub 4 are in a one-way power transmission state. At this time, the power is entered by the power input base 5 and transmitted through the clutch 1. To the planet carrier 22, the carrier 22 transmits the rotational power to the planetary gear train for speed increasing transmission, and then the inner ring gear 22 is outputted from the first pawl 211 to the hub 4, and the wheel connected to the hub is rotated, and the gear is increased. The speed of the speed gear, the hub 4 and the ring gear 21 exceeds the rotation speed of the power input base 5, the second pawl 212 is overtaken, and the power transmission path is as indicated by the arrow in FIG. 10, and the state of the first pawl 211 is still as shown in the figure. 9 is shown.

As shown in FIG. 11, in the internal transmission, the control actuator 6 of the clutch control mechanism includes a cable holder 61, a cable guide 62, a guide plate mount 63, a control torsion spring 64, a mounting sleeve 65, and an axial card. Ring 66 and retaining nut 67. The pull cord holder 61 and the control seat 13 are both rotatably mounted on the end of the shaft 3 through the mounting sleeve 65, and are rotatably assembled with the hub by the bead frame member 41, between the cord holder 61 and the mounting sleeve 65, and mounted. The sleeve 65 and the control seat 13 are respectively connected by a circumferential positioning structure, and the cable seat 61 is connected with the cable pulling system outside the internal transmission, and the cable carrier 61 is driven to rotate circumferentially relative to the shaft 3 through the cable to drive the clutch. The control seat 13 of the control mechanism rotates, and at the same time, the cable holder 61 and the shaft 3 are connected by a control torsion spring 64 to realize the elastic returning element of the cable holder 61. The cable guiding plate 62 is circumferentially assembled on the outer side of the cable holder 61 through the guiding plate mounting seat 63 for axial positioning of the cable holder, and is also used for guiding the pulling rope into the drawing rope seat, and the guiding plate is installed. The seat 63 is assembled by circumferentially positioning with the shaft 3 through the non-circular flat position, and the positioning and assembly are realized by the circumferentially fitting projections and grooves between the rope guiding plate 62 and the guide plate mounting seat 63, and at the same time, guided An axial snap ring 66 is disposed on the outer side of the plate mounting seat 63 as an axial positioning assembly of the cable guide plate 62. The shaft 3 on the outer side of the guide plate mounting seat 63 is screwed with a fixing nut 67 to realize the entire clutch control mechanism and the control actuator. The shaft 3 is axially locked. The guide plate mounting seat 63 is embedded in the inner ring of the cable holder 61. When the flywheel is replaced: the axial cable collar 66 is removed to take out the cable guide plate 62 and the cable holder 61, so that the nut is not removed. The flywheel replacement of the power input base of the internal transmission is performed without affecting the internal structural assembly.

The internal transmission to which the present invention is applied can be applied to a hub including a bicycle, an electric assist bicycle or a motorcycle, and is not limited to the three-speed internal transmission described in the present embodiment, and those skilled in the art can vary according to the transmission speed ratio. Various similar embodiments within the scope of the present application are used in the above embodiments, and the present embodiments are not enumerated here.

This application claims the patent application filed on Jan. 27, 2017, filed on Jan. 27,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Claims (10)

 A clutch control mechanism, the clutch is rotatably and slidably fitted on a shaft, and the clutch is provided with two sets of clutch structures, wherein one set of clutch structures is drivingly connected with one transmission component, and the other set of clutch structure and another transmission component are a clutch connection, wherein the control mechanism comprises a control sleeve, a control rod and a control seat, the control sleeve and the control seat are respectively fitted on the shaft, the control sleeve is axially positioned and connected with the clutch, and is controlled Freely rotating between the sleeve and the clutch, the control seat is rotatably mounted on the shaft and coupled to a control actuator that effects circumferential rotation along the shaft, the control rod is slidably disposed along the axis of the shaft, one end and the control The sleeves are axially positioned and connected to each other, and the other end is in contact with a control cam surface provided on the rotating circumference of the control seat.    The clutch control mechanism according to claim 1, wherein the control sleeve is fitted in a clutch inner hole, and an outer wall of the control sleeve is provided with a flange, one side of the flange and an axial direction of the inner wall of the clutch The positioning step abuts, and the axial positioning connection is realized between the other side and the axial positioning step through the axial positioning member.    The clutch control mechanism of claim 2, wherein the control sleeve is provided with a positioning hole, and the control rod is provided with a positioning protrusion embedded in the positioning hole, and the positioning hole and the positioning protrusion are embedded Assembled to achieve an axial positioning connection between the control rod and the control sleeve.    A clutch control mechanism according to claim 3, wherein the distal end of the control sleeve connecting lever is coupled to the shoulder on the shaft via a compressed spring.    The clutch control mechanism according to claim 4, wherein the shaft is provided with an axial sliding groove, and the control rod is slidably fitted in the sliding groove.    An internal transmission including a planetary gear train housed inside a hub, and a clutch disposed between the power input base and the planet carrier of the planetary gear train, wherein the clutch application is as described in any one of claims 1-5 a clutch control mechanism; the center wheel of the planetary gear train is fixedly coupled to the shaft, the inner ring gear of the planetary gear train is coupled to the inner wall of the hub through the first pawl, and the inner ring gear is further transmitted through the second pawl Cooperating with the power input seat, the carrier is engaged with the inner wall of the hub through the third pawl; the first pawl, the second pawl and the third pawl are maintained in a pop-up state by a compression spring, and the clutch is provided with The slope structure under which the first pawl is depressed is controlled.    The internal transmission of claim 6, wherein the clutch end and the power input base form a normally combined transmission state through a sliding jaw structure, and the other end of the clutch and the carrier are formed by a jaw-type clutch structure. The clutch structure is in contact with the first pawl during the separation of the clutch from the carrier, and controls the first pawl to bounce and cooperate with the inner wall of the hub.    The internal transmission according to claim 7, wherein the intermediate position of the first pawl is disposed on the inner ring gear through the pin shaft, and the outer end of the first pawl is springed up by the compression spring to engage with the ratchet groove of the inner wall of the hub The other end is in contact with the ramp structure that passes through the ring gear and the clutch.    The internal transmission of any one of claims 6-8, wherein the control actuator of the clutch control mechanism includes a cable seat disposed at an outer end of the hub, the cable seat is pivotally fitted at the end of the shaft, and The control seat is coaxially rotated and assembled, and the control seat is rotatably mounted on the shaft through the mounting sleeve.    The internal transmission of claim 9, wherein the control actuator further comprises a pull cord guide plate fixedly mounted on the shaft through a guide plate mount, the guide plate mount being located at the drawstring seat In the inner ring of the mounting, the guide plate mounting seat is axially fixed to the shaft through a fixing nut, the pulling wire guiding plate is fixed in the circumferential direction of the guiding plate mounting seat, and is axially fixed through the axial clamping ring, and the pulling The rope seat is rotatably mounted on the guide plate mounting seat, and the cable connecting the gear unit to control the power component is connected to the cable seat through the cable guide plate.