Wide adjusting belt wheel suitable for V-shaped belt continuously variable transmission and V-shaped belt continuously variable transmission

Abstract

The utility model discloses a width adjusting belt wheel suitable for a V-shaped belt continuously variable transmission and the V-shaped belt continuously variable transmission. The width adjusting belt wheel suitable for the V-shaped belt continuously variable transmission is a movable belt wheel composed of a left cone disc and a right cone disc. Three tooth pieces with the same height are arranged on the cylinder wall of a cylinder at one end of the left cone disc and the right cone disc, the width of the three tooth pieces is equal to the gap between every two adjacent tooth pieces, inner threads are arranged in inner cavities of cylinders at the other ends of the left cone disc and the right cone disc, and outer circle gear teeth are arranged outside the cylinders. The internal threads of the left cone disc and the right cone disc are respectively screwed with the external threads of the left thread sleeve and the right thread sleeve; the excircle gear teeth of the left cone disc are meshed with the transmission gear; outer circle gear teeth of the right conical disc are meshed with the left planetary gear; the three tooth pieces of the left cone disc and the three tooth pieces of the right cone disc are staggered, inserted into gaps of the three adjacent tooth pieces of each other respectively and connected in a sliding mode. The adjustable-speed motor drives the left cone disc and the right cone disc to move in the opposite direction or the opposite direction. The transmission mechanism is simple and compact in structure and capable of transmitting larger torque.

Description

Technical Field

[0001] The utility model relates to a band-adjusting pulley suitable for a V-belt continuously variable transmission and a V-belt continuously variable transmission. Background Art

[0002] Chinese patent application No. 201420420176.8 discloses a widening pulley of a V-belt continuously variable transmission and a V-belt continuously variable transmission. For the width adjustment pulley of the V-belt continuously variable transmission, the two ends of its transmission shaft are supported on the housing, the left cone disk and the right cone disk are respectively sleeved on the left section and the right section of the transmission shaft and can slide on the transmission shaft; the inner cavity of the transmission shaft is hollow, and the side wall of the transmission shaft is provided with a left strip slot hole and a right strip slot hole; the left end of the width adjustment screw extends into the inner cavity of the transmission shaft from the right end opening of the transmission shaft and is supported on the left end of the inner cavity of the transmission shaft; the left threaded sleeve and the right threaded sleeve are provided with internal threads with opposite rotation directions, and the width adjustment screw has two sections with threads with opposite rotation directions, which are respectively screwed with the left threaded sleeve and the right threaded sleeve; the outer periphery of the left threaded sleeve is fixedly connected to the inner end of the left cone disk connecting key, and the outer periphery of the right threaded sleeve is fixedly connected to the inner end of the right cone disk connecting key, and the outer ends of the left cone disk connecting key and the outer ends of the right cone disk connecting key respectively pass through the left strip slot hole and the right strip slot hole on the transmission shaft and are fixedly connected to the left cone disk and the right cone disk. The right end of the width adjustment screw is connected to the speed regulating motor through a planetary reduction mechanism. A cover is provided outside the planetary reduction mechanism and the speed regulating motor. The cover is fixedly mounted on the right end of the transmission shaft and clamps the shoulder of the right end of the width adjustment screw to prevent the width adjustment screw from axial movement. The speed regulating motor drives the width adjustment screw to rotate forward and backward through the planetary reduction mechanism, so that the left thread sleeve and the right thread sleeve move toward or in the opposite direction, thereby driving the left cone disc and the right cone disc to move toward or in the opposite direction.

[0003] The disadvantage of this patent is that the structure is complex. A width adjustment screw and left and right threaded sleeves are arranged in the hollow inner cavity of the transmission shaft. The width adjustment screw drives the left and right threaded sleeves to run in the inner cavity of the transmission shaft. The left and right threaded sleeves are connected to the left and right cone disks through the strip slots arranged on the side wall of the transmission shaft through the left cone disk connecting key and the right cone disk connecting key. As a result, the transmission torque is not large enough, which greatly affects its use efficiency. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a bandwidth adjustment pulley suitable for a V-belt continuously variable transmission.

[0005] Another technical problem to be solved by the utility model is to provide a V-belt continuously variable transmission.

[0006] For a belt-adjustable pulley suitable for a V-belt continuously variable transmission, the utility model adopts a technical solution that includes a housing, a transmission shaft and a movable pulley; the transmission shaft is mounted on the housing through a bearing; the movable pulley includes a left cone disk and a right cone disk; and further includes a support shaft, a speed regulating motor, a left cone disk, a right cone disk, a left screw sleeve, a right screw sleeve, a planetary reduction mechanism and a transmission gear;

[0007] Both ends of the support shaft are supported by the housing through bearings respectively;

[0008] The left screw sleeve is sleeved on the left section of the support shaft and is fixedly connected to the support shaft through a spline, and the outer cylindrical surface of the left screw sleeve is provided with an external thread; the right screw sleeve is sleeved on the right section of the support shaft and is fixedly connected to the support shaft through a spline, and the outer cylindrical surface of the right screw sleeve is provided with an external thread;

[0009] The transmission gear is fixedly mounted on the inner end of the transmission shaft;

[0010] The right end of the left cone disk is a cylinder that matches the diameter of the support shaft. The cylinder wall is provided with three left tooth plates of equal height. The widths of the three left tooth plates and the gaps between adjacent tooth plates are equal. The left end of the left cone disk is a cylinder that matches the outer diameter of the left screw sleeve. The inner cavity of the cylinder is provided with an internal thread that matches the external thread of the left screw sleeve. The outer surface of the left end cylinder of the left cone disk is provided with external circular gear teeth.

[0011] The left cone disc is sleeved on the left section of the supporting shaft, the internal thread of the left cone disc is screwed with the external thread of the left screw sleeve, and the outer circular gear teeth of the left cone disc are meshed with the transmission gear;

[0012] The left end of the right cone disk is a cylinder matched with the diameter of the support shaft, and the cylinder wall is provided with three right tooth plates of equal height, and the widths of the three right tooth plates and the gaps between adjacent tooth plates are equal. The right end of the right cone disk is a cylinder matched with the outer diameter of the right screw sleeve, and the inner cavity of the cylinder is provided with an internal thread matched with the external thread of the right screw sleeve, and the outer surface of the cylinder at the right end of the right cone disk is provided with external circular gear teeth;

[0013] The right cone disc is sleeved on the right section of the supporting shaft, the internal thread of the right cone disc is screwed together with the external thread of the right screw sleeve, and the outer circular gear teeth at the right end of the right cone disc are meshed with the left planetary gear;

[0014] The three left tooth plates of the left cone disk and the three right tooth plates of the right cone disk are staggered and respectively inserted into the gaps between the three adjacent tooth plates of the other party, and the three left tooth plates of the left cone disk and the three right tooth plates of the right cone disk are slidably connected to each other;

[0015] The planetary reduction mechanism includes a speed regulating motor and a left planetary gear, and the left planetary gear is meshed with the outer circular gear of the right cone disk; the speed regulating motor drives the right cone disk to rotate along the outer thread of the right screw sleeve through the left planetary gear, and the right cone disk simultaneously drives the left cone disk to rotate synchronously along the outer thread of the left screw sleeve;

[0016] The external thread of the left screw sleeve has an opposite direction of rotation to the external thread of the right screw sleeve;

[0017] The forward or reverse rotation of the speed regulating motor causes the left cone disc and the right cone disc to move toward or away from each other along the axial direction of the supporting shaft, and at the same time, the distance between the left cone disc and the right cone disc increases or decreases along the axial direction of the supporting shaft.

[0018] Preferably, the planetary reduction mechanism further includes a planet carrier, a sun gear, a planet shaft and a right planetary gear;

[0019] The rotor of the speed regulating motor is arranged on the outer periphery of the stator, and the stator of the speed regulating motor is sleeved on the right section of the supporting shaft;

[0020] The rotor and the planet carrier are integrally arranged and the rotor and the planet carrier rotate synchronously around the stator;

[0021] The planetary shaft is connected to the planetary carrier through a bearing, the left end of the planetary shaft is fixedly connected to the left planetary gear, and the right end of the planetary shaft is fixedly connected to the right planetary gear; the sun gear is sleeved on the support shaft and fixedly connected to the support shaft; the right planetary gear is meshed with the sun gear, and the left planetary gear is meshed with the right outer circular gear teeth at the right end of the right cone disk.

[0022] Preferably, the planetary reduction mechanism further includes a planet carrier, a sun gear, a planet shaft and a right planetary gear;

[0023] The stator of the speed regulating motor is arranged on the outer periphery of the rotor, and the stator of the speed regulating motor is fixedly connected to the housing;

[0024] The rotor and the planet carrier are integrally arranged and the rotor and the planet carrier rotate synchronously around the stator;

[0025] The planetary shaft is connected to the planetary carrier through a bearing, the left end of the planetary shaft is fixedly connected to the left planetary gear, and the right end of the planetary shaft is fixedly connected to the right planetary gear; the sun gear is sleeved on the support shaft and fixedly connected to the support shaft; the right planetary gear is meshed with the sun gear, and the left planetary gear is meshed with the right outer circular gear teeth at the right end of the right cone disk.

[0026] Preferably, the speed regulating motor is a brushless servo motor.

[0027] For a V-belt continuously variable transmission, the technical solution adopted by the utility model is: it includes a housing, an active band-modulating pulley, a passive band-modulating pulley and a V-belt; the active band-modulating pulley and the passive band-modulating pulley are respectively the band-modulating pulleys of the above-mentioned V-belt continuously variable transmission, and the supporting shaft of the active band-modulating pulley and the supporting shaft of the passive band-modulating pulley are respectively supported by the housing; the V-belt connects the active band-modulating pulley and the passive band-modulating pulley.

[0028] Preferably, it also includes a driving wheel speed regulating motor, a driven wheel speed regulating motor, an active planetary reduction mechanism and a driven planetary reduction mechanism; the output shaft of the driving wheel speed regulating motor drives the right cone disk of the active wide-band speed regulating wheel to rotate through the active planetary reduction mechanism; the output shaft of the driven wheel speed regulating motor drives the right cone disk of the driven wide-band speed regulating wheel to rotate through the driven planetary reduction mechanism.

[0029] As a further preference, it also includes an electronic controller, which is connected to the driving wheel speed regulating motor and the driven wheel speed regulating motor respectively.

[0030] It is further preferred that the driving wheel speed regulating motor and the driven wheel speed regulating motor are brushless servo motors.

[0031] The beneficial effects of the utility model are:

[0032] This design is compact and can transmit greater torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] Figure 1 The utility model is a schematic structural diagram of an embodiment of a width-adjusting pulley suitable for a V-belt continuously variable transmission.

[0035] Figure 2 The utility model is a front view of the left cone disk of an embodiment of a widening pulley suitable for a V-belt continuously variable transmission.

[0036] Figure 3 It is a left view of the left cone disk of an embodiment of a widening pulley suitable for a V-belt continuously variable transmission of the utility model.

[0037] Figure 4 yes Figure 2 AA section view.

[0038] Figure 5 It is a front view of the right cone disk of an embodiment of a widening pulley suitable for a V-belt continuously variable transmission of the utility model.

[0039] Figure 6 It is a right view of the right cone disk of an embodiment of a widening pulley suitable for a V-belt continuously variable transmission of the utility model.

[0040] Figure 7 yes Figure 5 BB cross-sectional view.

[0041] Figure 8 The utility model is a schematic diagram of assembling a left cone disk and a right cone disk of an embodiment of a widening pulley suitable for a V-belt continuously variable transmission.

[0042] Fig. 9 This is a schematic diagram of the first speed regulating motor and planetary gear structure of the utility model suitable for a width regulating pulley embodiment of a V-belt continuously variable transmission.

[0043] Fig.10 yes Fig. 9 CC cross-sectional view.

[0044] Fig.11 This is a schematic diagram of the second speed regulating motor and planetary gear structure of the utility model suitable for the wide-band pulley embodiment of the V-belt continuously variable transmission.

[0045] Fig.12 yes Fig.11 DD cross-sectional view.

[0046] Fig.13 It is a first structural schematic diagram of an embodiment of the V-belt continuously variable transmission of the utility model.

[0047] Fig.14 This is a second structural schematic diagram of an embodiment of the V-belt continuously variable transmission of the utility model.

[0048] Markings in the figure:

[0049] 1- transmission shaft, 2- transmission gear, 3- left cone disk, 4- V-belt, 5- right cone disk, 6- left planetary gear, 7- stator, 8- rotor, 9- right planetary gear, 10- housing, 11- left screw sleeve, 12- support shaft, 13- right screw sleeve, 14- planetary shaft, 15- planetary wheel carrier, 16- sun gear, 17- left gear plate, 18- right gear plate. DETAILED DESCRIPTION

[0050] Figure 1 The invention relates to a width-adjusting pulley suitable for a V-belt continuously variable transmission, which is composed of a housing 10, a transmission shaft 1, a support shaft 12, a speed-regulating motor, a left cone disk 3, a right cone disk 5, a left screw sleeve 11, a right screw sleeve 13, a planetary reduction mechanism and a transmission gear 2.

[0051] The transmission shaft is installed on the housing through a bearing, the inner end of the transmission shaft extends into the inner cavity of the housing, and the transmission gear is fixedly installed on the inner end of the transmission shaft.

[0052] Both ends of the support shaft 12 are connected to the housings on both sides through bearings.

[0053] The left screw sleeve is sleeved on the left section of the support shaft and is fixedly connected to the support shaft through a spline, and the outer cylindrical surface of the left screw sleeve is provided with an external thread. The right screw sleeve is sleeved on the right section of the support shaft and is fixedly connected to the support shaft through a spline, and the outer cylindrical surface of the right screw sleeve is provided with an external thread. The external thread of the left screw sleeve and the external thread of the right screw sleeve have opposite rotation directions.

[0054] The left cone disc and the right cone disc form a movable pulley.

[0055] like Figure 2The left cone disk shown in the figure has a right end which is a cylinder that matches the diameter of the support shaft. The cylinder wall is divided into six equal parts with the center of the cylinder as the center of the circle, of which three equal parts are set as three left teeth 17 of equal height, and the other three equal parts are the gaps between adjacent left teeth. In this way, the width of each left tooth is equal to the gap between two adjacent left teeth, that is, the width of each left tooth or the gap between two adjacent left teeth is one of the six equal parts. The left end of the left cone disk is a cylinder that matches the outer diameter of the left screw sleeve. The inner cavity of the cylinder is provided with an internal thread that matches the external thread of the left screw sleeve. The outer surface of the left end cylinder of the left cone disk is provided with an external round gear ( Figure 3 and Figure 4 ).

[0056] The left cone disc is sleeved on the left section of the supporting shaft, the inner thread of the left cone disc is screwed together with the outer thread of the left screw sleeve, and the outer circular gear teeth of the left cone disc are meshed with the transmission gear.

[0057] like Figure 5 The right cone disk shown in the figure has a cylinder at its left end that matches the diameter of the support shaft. The cylinder wall is also divided into six equal parts with the center of the cylinder as the center of the circle. Three of the equal parts are set as three right tooth pieces 18 of equal height, and the other three equal parts are the gaps between adjacent left tooth pieces. Similarly, the width of each right tooth piece is equal to the gap between two adjacent right tooth pieces, that is, the width of each right tooth piece or the gap between two adjacent right tooth pieces is one of the six equal parts. The right end of the right cone disk is a cylinder that matches the outer diameter of the right screw sleeve. The inner cavity of the cylinder is provided with an internal thread that matches the external thread of the right screw sleeve. The outer surface of the cylinder at the right end of the right cone disk is provided with an external round gear ( Figure 6 and Figure 7 ).

[0058] The right cone disc is sleeved on the right section of the supporting shaft, the internal thread of the right cone disc is screwed together with the external thread of the right screw sleeve, and the outer circular gear teeth at the right end of the right cone disc are meshed with the left planetary gear 6.

[0059] After the right cone disc and the left cone disc are assembled, the three left teeth 17 of the left cone disc and the three right teeth 18 of the right cone disc are staggered, and the left teeth are respectively inserted into the gaps between the three adjacent teeth of the right teeth ( Figure 8 ), the three right teeth of the right cone disc and the three left teeth of the left cone disc are interlaced with each other, so that the right cone disc and the left cone disc are connected in a sliding manner.

[0060] In this embodiment, the cylindrical wall at the right end of the left cone disk or the cylindrical wall at the left end of the right cone disk can also be divided into four equal parts or eight equal parts, or more even-numbered equal parts. In this way, two or four tooth pieces can be arranged on the cylinder wall, that is, the width of each tooth piece or the gap between two adjacent tooth pieces is one of the four equal parts or eight equal parts. Whether it is two tooth pieces, three tooth pieces or four tooth pieces, the number of tooth pieces on the left cone disk must be the same as the number of tooth pieces on the right cone disk, and they can be inserted into the gaps between the adjacent tooth pieces of each other in an interlaced manner, so that the right cone disk and the left cone disk are connected in a mutually sliding manner.

[0061] The planetary reduction mechanism is composed of a speed regulating motor, a left planetary gear, a planetary carrier 15, a sun gear 16, a planetary shaft 14 and a right planetary gear 9.

[0062] How it works

[0063] During operation, the speed regulating motor in the planetary reduction mechanism drives the right cone disc to rotate along the external thread of the right screw sleeve through the left planetary gear, and the right cone disc synchronously drives the left cone disc to rotate along the external thread of the left screw sleeve. Since the rotation direction of the external thread of the left screw sleeve is opposite to that of the right screw sleeve, and the left screw sleeve and the right screw sleeve are respectively fixedly connected to the support shaft, the forward or reverse rotation of the speed regulating motor causes the left cone disc and the right cone disc to move toward or away from each other along the axial direction of the support shaft, and at the same time, the gap between the left cone disc and the right cone disc increases or decreases along the axial direction of the support shaft, and the contact radius of the V-belt 4 and the movable pulley also increases or decreases accordingly, and finally the purpose of changing the transmission speed ratio of the movable pulley is achieved.

[0064] Let's talk about the running state of the support shaft. Since the left screw sleeve and the right screw sleeve are fixedly connected to the support shaft through keys, when the speed is not adjusted, the left and right cone disks and the left and right screw sleeves including the support shaft rotate synchronously. When the speed is adjusted, the left and right cone disks and the left and right screw sleeves including the support shaft are in a relative rotation state, that is, the left and right cone disks and the left and right screw sleeves including the support shaft are rotating, but the rotation speeds of the left and right cone disks and the left and right screw sleeves including the support shaft are different, that is, there is a relative speed difference between the left and right cone disks and the left and right screw sleeves including the support shaft. It is this relative speed difference that makes the left and right cone disks move toward or away from each other along the support shaft. For example: when the rotation speed of the left and right cone disks is greater than the rotation speed of the left and right screw sleeves including the support shaft, the left and right cone disks move in a certain direction. When the rotation speed of the left and right cone disks is less than the rotation speed of the left and right screw sleeves including the support shaft, the left and right cone disks move in the opposite direction. As for whether the left and right cone disks move toward or away from each other, it depends on how the thread rotation direction on the left and right screw sleeves is set. In summary, the operating states of the left and right cone disks and the left and right screw sleeves including the support shaft described above are understandable to those skilled in the art.

[0065] The planetary reduction mechanism of this embodiment can be realized in the following two different forms:

[0066] In the first type of planetary reduction mechanism, the rotor 7 of the speed regulating motor is arranged on the outer periphery of the stator 8 ( Fig. 9 ), and the stator of the speed regulating motor is sleeved on the right section of the support shaft ( Fig.10 ).

[0067] The rotor and the planet carrier are arranged as one body and the rotor and the planet carrier rotate synchronously around the stator.

[0068] The middle of the planetary shaft is connected to the planetary frame through a bearing, wherein the left end of the planetary shaft is fixedly connected to the left planetary gear, and the right end of the planetary shaft is fixedly connected to the right planetary gear. The sun gear is sleeved on the support shaft and fixedly connected to the support shaft. The right planetary gear meshes with the sun gear, and the left planetary gear meshes with the right outer circle gear teeth at the right end of the right cone disk.

[0069] In the second type of planetary reduction mechanism, the stator 8 of the speed regulating motor is arranged on the outer periphery of the rotor 7 ( Fig.11 ), and the stator of the speed regulating motor is fixedly connected to the housing 10 ( Fig.12 ).

[0070] The rotor and the planet carrier are arranged as one body and the rotor and the planet carrier rotate synchronously around the stator.

[0071] The middle of the planetary shaft is connected to the planetary frame through a bearing, wherein the left end of the planetary shaft is fixedly connected to the left planetary gear, and the right end of the planetary shaft is fixedly connected to the right planetary gear. The sun gear is sleeved on the support shaft and fixedly connected to the support shaft. The right planetary gear meshes with the sun gear, and the left planetary gear meshes with the right outer circle gear teeth at the right end of the right cone disk.

[0072] In this embodiment, the speed regulating motor is a brushless servo motor.

[0073] Fig.13 The invention relates to a V-belt continuously variable transmission using the above-mentioned wide-band gear, which is composed of a housing, an active wide-band gear, a passive wide-band gear, an active wheel speed regulating motor, a driven wheel speed regulating motor, an active planetary reduction mechanism, a driven planetary reduction mechanism and a V-belt 4.

[0074] The active band-modulating pulley and the passive band-modulating pulley are the band-modulating pulleys of the V-belt continuously variable transmission, and the two ends of the supporting shaft of the active band-modulating pulley and the supporting shaft of the passive band-modulating pulley are supported by the housing through bearings. The active band-modulating pulley and the passive band-modulating pulley are connected by a V-belt.

[0075] The output shaft of the driving wheel speed regulating motor drives the right cone disk of the active wide-band regulating wheel to rotate through the active planetary reduction mechanism.

[0076] The output shaft of the driven wheel speed regulating motor drives the right cone disk of the driven wide speed regulating wheel to rotate through the driven planetary reduction mechanism.

[0077] In the active planetary reduction mechanism and the driven planetary reduction mechanism of this V-belt continuously variable transmission, the rotors of the driving wheel speed regulating motor and the driven wheel speed regulating motor are surrounded by the stator, which is the same as the structure of the first form of planetary reduction mechanism mentioned above.

[0078] The V-belt continuously variable transmission also includes an electronic controller, which is connected to the driving wheel speed regulating motor and the driven wheel speed regulating motor respectively, and the driving wheel speed regulating motor and the driven wheel speed regulating motor are respectively speed regulated and controlled by the electronic controller.

[0079] The driving wheel speed regulating motor and the driven wheel speed regulating motor are brushless servo motors.

[0080] Fig.13 It is another V-belt continuously variable transmission that also uses the above wide-band speed-adjusting pulley. The difference is that in the active planetary speed reduction mechanism and the driven planetary speed reduction mechanism used in it, the stators of the active wheel speed-adjusting motor and the driven wheel speed-adjusting motor are surrounded by the rotor, and the stator is fixedly connected to the housing, that is, the structure is the same as the second form of planetary speed reduction mechanism mentioned above. The advantage of this form is that the structure is more compact.

[0081] The above-described implementation methods of the utility model do not constitute a limitation on the protection scope of the utility model. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the claims of the utility model.

Claims

1. A width-adjustable pulley suitable for a V-belt continuously variable transmission, comprising a housing, a transmission shaft and a movable pulley; the transmission shaft is mounted on the housing through a bearing; the movable pulley comprises a left cone disc and a right cone disc; the characteristics are: It also includes a support shaft, a speed regulating motor, a left cone disc, a right cone disc, a left screw sleeve, a right screw sleeve, a planetary reduction mechanism and a transmission gear; Both ends of the support shaft are supported by the housing through bearings respectively; The left screw sleeve is sleeved on the left section of the support shaft and is fixedly connected to the support shaft through a spline, and the outer cylindrical surface of the left screw sleeve is provided with an external thread; the right screw sleeve is sleeved on the right section of the support shaft and is fixedly connected to the support shaft through a spline, and the outer cylindrical surface of the right screw sleeve is provided with an external thread; The transmission gear is fixedly mounted on the inner end of the transmission shaft; The right end of the left cone disk is a cylinder that matches the diameter of the support shaft, and the cylinder wall is provided with three left tooth plates of equal height, and the widths of the three left tooth plates and the gaps between adjacent tooth plates are equal. The left end of the left cone disk is a cylinder that matches the outer diameter of the left screw sleeve, and the inner cavity of the cylinder is provided with an internal thread that matches the external thread of the left screw sleeve, and the outer surface of the left end cylinder of the left cone disk is provided with external circular gear teeth; The left cone disc is sleeved on the left section of the support shaft, the internal thread of the left cone disc is screwed with the external thread of the left screw sleeve, and the outer circular gear teeth of the left cone disc are meshed with the transmission gear; The left end of the right cone disk is a cylinder that matches the diameter of the support shaft, and the cylinder wall is provided with three right tooth plates of equal height, and the widths of the three right tooth plates and the gaps between adjacent tooth plates are equal. The right end of the right cone disk is a cylinder that matches the outer diameter of the right screw sleeve, and the inner cavity of the cylinder is provided with an internal thread that matches the external thread of the right screw sleeve, and the outer surface of the cylinder at the right end of the right cone disk is provided with external circular gear teeth; The right cone disk is sleeved on the right section of the support shaft, the internal thread of the right cone disk is screwed together with the external thread of the right screw sleeve, and the outer circular gear teeth at the right end of the right cone disk are meshed with the left planetary gear; The three left tooth plates of the left cone disk and the three right tooth plates of the right cone disk are staggered and respectively inserted into the gaps between the three adjacent tooth plates of the other party, and the three left tooth plates of the left cone disk and the three right tooth plates of the right cone disk are slidably connected to each other; The planetary reduction mechanism comprises a speed regulating motor and a left planetary gear, wherein the left planetary gear is meshed with the outer circular gear of the right cone disk; the speed regulating motor drives the right cone disk to rotate along the outer thread of the right screw sleeve through the left planetary gear, and the right cone disk simultaneously drives the left cone disk to rotate synchronously along the outer thread of the left screw sleeve; The external thread of the left screw sleeve has an opposite rotation direction to that of the external thread of the right screw sleeve; The forward or reverse rotation of the speed regulating motor causes the left cone disc and the right cone disc to move toward or away from each other along the axial direction of the support shaft, and at the same time, the distance between the left cone disc and the right cone disc increases or decreases along the axial direction of the support shaft.

2. The width adjustment pulley suitable for a V-belt continuously variable transmission according to claim 1, characterized in that: The planetary reduction mechanism also includes a planet carrier, a sun gear, a planet shaft and a right planetary gear; The rotor of the speed regulating motor is arranged on the outer periphery of the stator and the stator is sleeved on the right section of the supporting shaft; The rotor and the planet carrier are integrally arranged and the rotor and the planet carrier rotate synchronously around the stator; The planet shaft is connected to the planet carrier through a bearing, the left end of the planet shaft is fixedly connected to the left planetary gear, and the right end of the planet shaft is fixedly connected to the right planetary gear; the sun gear is sleeved on the support shaft and fixedly connected to the support shaft; the right planetary gear is meshed with the sun gear.

3. The width adjustment pulley suitable for a V-belt continuously variable transmission according to claim 1, characterized in that: The planetary reduction mechanism also includes a planet carrier, a sun gear, a planet shaft and a right planetary gear; The stator of the speed regulating motor is arranged on the outer periphery of the rotor and the stator is fixedly connected to the housing; The rotor and the planet carrier are integrally arranged and the rotor and the planet carrier rotate synchronously around the stator; The planet shaft is connected to the planet carrier through a bearing, the left end of the planet shaft is fixedly connected to the left planetary gear, and the right end of the planet shaft is fixedly connected to the right planetary gear; the sun gear is sleeved on the support shaft and fixedly connected to the support shaft; the right planetary gear is meshed with the sun gear.

4. The width-adjusting pulley suitable for a V-belt continuously variable transmission according to any one of claims 1 to 3, characterized in that: The speed regulating motor is a brushless servo motor.

5. A V-belt continuously variable transmission, comprising a housing, an active width-adjusting pulley, a passive width-adjusting pulley and a V-belt; characterized in that: The active band-modulating pulley and the passive band-modulating pulley are respectively the band-modulating pulleys suitable for the V-belt continuously variable transmission as described in claim 1, and the supporting shaft of the active band-modulating pulley and the supporting shaft of the passive band-modulating pulley are respectively supported by the housing; the V-belt connects the active band-modulating pulley and the passive band-modulating pulley.

6. The V-belt continuously variable transmission according to claim 5, characterized in that: It also includes a driving wheel speed regulating motor, a driven wheel speed regulating motor, an active planetary reduction mechanism and a driven planetary reduction mechanism; the output shaft of the driving wheel speed regulating motor drives the right cone disk of the active wide-band speed regulating wheel to rotate through the active planetary reduction mechanism; the output shaft of the driven wheel speed regulating motor drives the right cone disk of the driven wide-band speed regulating wheel to rotate through the driven planetary reduction mechanism.

7. The V-belt continuously variable transmission according to claim 6, characterized in that: It also includes an electronic controller, which is connected to the driving wheel speed regulating motor and the driven wheel speed regulating motor respectively.

8. The V-belt continuously variable transmission according to any one of claims 6-7, characterized in that: The driving wheel speed regulating motor and the driven wheel speed regulating motor are brushless servo motors.

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