Transmission and vehicle

Abstract

The utility model provides a transmission and a vehicle. The transmission comprises a transmission shaft (10), a transmission mechanism (20) and a gear shifting mechanism (30). The transmission shaft (10) is used for driving the transmission mechanism (20) to rotate. The transmission mechanism (20) comprises a planetary gear assembly (21) mounted on the transmission shaft (10) and a plurality of gear rings (22) mounted on the outer side of the planetary gear assembly (21), and clamping grooves (23) are formed in the outer sides of the gear rings (22); the gear shifting mechanism (30) comprises a gear shifting sleeve (31) and pawls (32), and the gear shifting sleeve (31) is used for driving the pawls (32) to be clamped in the clamping grooves (23) of one or more gear rings (22) when rotating to the gear shifting position so as to limit rotation of the corresponding gear rings (22), so that the transmission path of the transmission mechanism (20) is changed. According to the transmission provided by the utility model, the occupied space of the gear shifting mechanism can be reduced, so that the size of the transmission is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission technical field especially is a kind of transmission and vehicle. BACKGROUND

[0002] The volume of transmission has important influence on the overall weight and appearance of two-wheeled vehicle, and reducing the volume of transmission is the goal that technical personnel in the industry has been pursuing. Adding shift mechanism in transmission can realize multiple shift modes of transmission and improve shift flexibility, but the shift mechanism occupies a large space, which increases the volume of transmission. SUMMARY

[0003] The utility model discloses a kind of transmission and vehicle, to solve the problem of large space occupied by shift mechanism in existing transmission.

[0004] In a first aspect, the present application provides a kind of transmission, including transmission shaft (10), transmission mechanism (20) and shift mechanism (30), the transmission shaft (10) is used to drive the transmission mechanism (20) rotation;The transmission mechanism (20) includes planetary gear assembly (21) installed on the transmission shaft (10) and a plurality of gear rings (22) installed on the outer side of the planetary gear assembly (21), the outer side of the gear ring (22) is equipped with engagement slot (23);The shift mechanism (30) includes shift sleeve (31) and pawl (32), the shift sleeve (31) is sleeved on the outer side of the gear ring (22), and the pawl (32) is located between the shift sleeve (31) and the gear ring (22);The shift sleeve (31) is used to be driven when rotating to shift position the pawl (32) is engaged in the engagement slot (23) of one or more gear rings (22), to limit the rotation of corresponding gear ring (22), to change the transmission path of the transmission mechanism (20).

[0005] In an embodiment, the shift sleeve (31) is equipped with through hole (311) matched with the pawl (32), and the pawl (32) is used to pass through the through hole (311) when the shift sleeve (31) rotates to the shift position, so that the pawl (32) is engaged in the engagement slot (23).

[0006] In an embodiment, the outer side of the shift sleeve (31) is equipped with gear teeth (312), and the shift mechanism (30) further includes first gear (33) engaged with the gear teeth (312), and the shift sleeve (31) is used to rotate under the drive of the first gear (33).

[0007] In an embodiment, the gear shifting mechanism (30) further comprises a control shaft (34), and the first gear (33) is mounted at one end of the control shaft (34).

[0008] In an embodiment, the gear shifting mechanism (30) further comprises a second gear (35) mounted at the other end of the control shaft (34), and the second gear (35) is used to rotate under the drive of a first motor, so as to drive the first gear (33) to rotate.

[0009] In an embodiment, the number of the pawls (32) is plural, and each of the gear rings (22) corresponds to two pawls (32).

[0010] In an embodiment, the transmission further comprises a wear-resistant part (40) sleeved outside the transmission mechanism (20), and the wear-resistant part (40) is provided with a mounting groove (41), and the gear shifting sleeve (31) is mounted in the mounting groove (41).

[0011] In an embodiment, the radii of the plural gear rings (22) are the same.

[0012] In an embodiment, the planetary gear assembly (21) comprises a first planetary carrier (211), a second planetary carrier (212), a sun gear (213), a first gear set (214) and a second gear set (215); the first planetary carrier (211) is mounted on the transmission shaft (10), the second planetary carrier (212) is mounted on the first planetary carrier (211), the first gear set (214) is mounted on the first planetary carrier (211), and the second gear set (215) is mounted on the second planetary carrier (212); the sun gear (213) is rotatably mounted on the transmission shaft (10) and meshes with the first gear set (214) and the second gear set (215).

[0013] In an embodiment, the first gear set (214) comprises plural first double planetary gears (2141); and / or, the second gear set (215) comprises plural second double planetary gears (2151).

[0014] In an embodiment, the planetary gear assembly (21) further comprises a first one-way clutch (216) mounted between the first planetary carrier (211) and the second planetary carrier (212).

[0015] In an embodiment, the transmission further comprises a housing (50), the transmission shaft (10) passes through the housing (50), the number of the gear rings (22) is four, the outer sides of three of the gear rings (22) are provided with the pawls (32), and one of the gear rings (22) is mounted on the housing (50).

[0016] In an embodiment, the transmission further comprises a second one-way clutch (60) mounted between one of the ring gears (22) and the housing (50).

[0017] In an embodiment, the transmission further comprises an output assembly (70) sleeved on the transmission shaft (10) and connected with the planetary gear assembly (21).

[0018] In an embodiment, the transmission further comprises an output gear (80) mounted on the output assembly (70) and used to rotate under the driving of a second motor to drive the output assembly (70) to rotate.

[0019] In an embodiment, the transmission further comprises a third one-way clutch (90) mounted between the output assembly (70) and the output gear (80).

[0020] In a second aspect, the application provides a vehicle comprising a vehicle frame and the transmission of the first aspect, wherein the transmission is mounted on the vehicle frame.

[0021] The transmission provided by the utility model has the advantages that the transmission comprises a transmission shaft 10, a transmission mechanism 20 and a gear shifting mechanism 30, the transmission shaft 10 is used to drive the transmission mechanism 20 to rotate, the transmission mechanism 20 comprises a planetary gear assembly 21 mounted on the transmission shaft 10 and a plurality of ring gears 22 mounted on the outer side of the planetary gear assembly 21, the outer side of the ring gear 22 is provided with a clamping groove 23, the gear shifting mechanism 30 comprises a gear shifting sleeve 31 and a pawl 32, the gear shifting sleeve 31 is sleeved on the outer side of the ring gear 22, and the pawl 32 is located between the gear shifting sleeve 31 and the ring gear 22, the gear shifting sleeve 31 is used to drive the pawl 32 to be clamped in the clamping groove 23 of one or more ring gears 22 when rotating to a gear shifting position, so as to limit the rotation of the corresponding ring gear 22, thereby changing the transmission path of the transmission mechanism 20. By arranging the gear shifting mechanism 30 in the form of the gear shifting sleeve 31 and the pawl 32, the radial space occupied by the gear shifting mechanism 30 can be reduced, thereby reducing the volume of the transmission. Meanwhile, the pawl 32 can be clamped more firmly by driving the pawl 32 through the gear shifting sleeve 31, and the reliability of gear shifting is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced.

[0023] Figure 1 The schematic diagram of the transmission provided by the utility model embodiments;

[0024] Figure 2 An internal structure schematic view of the transmission is provided for the embodiment of the utility model;

[0025] Figure 3 Another internal structure schematic view of the transmission is provided for the embodiment of the utility model;

[0026] Figure 4 A shift mechanism schematic view of the transmission is provided for the embodiment of the utility model;

[0027] Figure 5 Another internal structure schematic view of the transmission is provided for the embodiment of the utility model;

[0028] Figure 6 An installation position schematic view of the shift mechanism is provided for the embodiment of the utility model;

[0029] Figure 7 A cross-sectional view of the transmission is provided for the embodiment of the utility model;

[0030] Figure 8 An assembly schematic view of the gear ring and the pawl of the transmission is provided for the embodiment of the utility model;

[0031] Figure 9 A shift mechanism schematic view of the transmission is provided for another embodiment of the utility model;

[0032] Figure 10 An installation position schematic view of the shift mechanism is provided for another embodiment of the utility model;

[0033] Figure 11 An assembly schematic view of the gear ring and the pawl of the transmission is provided for another embodiment of the utility model;

[0034] Figure 12 A planetary gear assembly schematic view of the transmission is provided for the embodiment of the utility model;

[0035] Figure 13 An internal structure schematic view of the planetary gear assembly of the transmission is provided for the embodiment of the utility model.

[0036] In the drawings, various reference signs are used:

[0037] 10, transmission shaft; 20, transmission mechanism; 21, planetary gear assembly; 211, first planet carrier; 212, second planet carrier; 213, sun gear member; 2131, first sun gear; 2132, second sun gear; 214, first gear set; 2141, first double planetary gear; 2142, first planetary gear; 2143, second planetary gear; 215, second gear set; 2151, second double planetary gear; 2152, third planetary gear; 2153, fourth planetary gear; 216, first one-way clutch; 22, ring gear; 221, first ring gear; 222, second ring gear; 223, third ring gear; 224, fourth ring gear; 23, engagement groove; 30, shifting mechanism; 31, shifting sleeve; 311, through hole; 312, tooth; 32, pawl; 321, first pawl; 322, second pawl; 323, third pawl; 33, first gear; 34, control shaft; 35, second gear; 36, first motor; 40, wear-resistant part; 41, mounting groove; 50, housing; 60, second one-way clutch; 70, output assembly; 80, output gear; 81, second motor; 90, third one-way clutch. DETAILED DESCRIPTION

[0038] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0039] Throughout the specification, reference to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Therefore, the phrases "in one embodiment" or "in some embodiments" appearing in various places throughout the specification are not all referring to the same embodiment. Furthermore, particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0040] In the description of the present application, it is understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0041] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purpose and are not to be construed as indicating or implying relative importance or a specific number of the technical features indicated. Therefore, the features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features.

[0042] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] Please refer to Figures 1 to 13 The transmission in the embodiments of the present application will be described.

[0044] The transmission comprises a transmission shaft 10, a transmission mechanism 20 and a shift mechanism 30, the transmission shaft 10 is used to drive the transmission mechanism 20 to rotate; the transmission mechanism 20 comprises a planetary gear assembly 21 mounted on the transmission shaft 10 and a plurality of gear rings 22 mounted outside the planetary gear assembly 21, the outside of the gear ring 22 is provided with a clamping groove 23; the shift mechanism 30 comprises a shift sleeve 31 and a pawl 32, the shift sleeve 31 is sleeved outside the gear ring 22, and the pawl 32 is located between the shift sleeve 31 and the gear ring 22; the shift sleeve 31 is used to drive the pawl 32 to be clamped in the clamping groove 23 of one or more gear rings 22 when it rotates to the shift position, so as to limit the rotation of the corresponding gear ring 22, thereby changing the transmission path of the transmission mechanism 20.

[0045] Specifically, the transmission shaft 10 is connected with the crank of the bicycle, and rotates under the drive of the crank or the electric motor, the transmission mechanism 20 rotates under the drive of the transmission shaft 10, and drives the flying disc to rotate, so as to drive the bicycle to move forward. When the pawl 32 of the gear shifting mechanism 30 engages with different gear rings 22, the motion state of the planetary gear assembly 21 is different, so that the transmission mechanism 20 has different transmission paths. The transmission path refers to the power transmission line between the transmission shaft 10 and the flying disc, and different transmission paths correspond to different gear positions. The transmission paths corresponding to each gear position are described in the embodiments below. Different transmission paths correspond to different gear ratios, and the gear ratio refers to the ratio of the input speed and the output speed of the transmission mechanism 20. The gear shifting mechanism 30 changes the transmission path of the transmission mechanism 20, which changes the output speed of the transmission mechanism 20, so that the transmission outputs different speeds. Since the gear shifting mechanism 30 includes the gear shifting sleeve 31 and the pawl 32, and the gear shifting sleeve 31 is arranged outside the gear ring 22, the size of the gear shifting mechanism 30 can be reduced in the radial direction, thereby reducing the volume of the transmission. At the same time, since the gear shifting sleeve 31 drives the pawl 32 in the circumferential direction, the pawl 32 can be engaged more firmly, and the reliability of gear shifting is improved.

[0046] In an embodiment, the gear shifting sleeve 31 is provided with a through hole 311 matched with the pawl 32, and the pawl 32 is used to pass through the through hole 311 when the gear shifting sleeve 31 rotates to the gear shifting position, so that the pawl 32 is engaged in the engagement groove 23. Exemplarily, the pawl 32 is sleeved on the fixed column and can rotate around the fixed column. When the gear shifting sleeve 31 does not rotate to the gear shifting position, the gear shifting sleeve 31 abuts against both ends of the pawl 32, the tangent line of the pawl 32 and the gear ring 22 is close to parallel, the pawl 32 is separated from the gear ring 22, and the gear ring 22 can rotate. When the gear shifting sleeve 31 rotates to the gear shifting position, one end of the pawl 32 rotates to the position of the through hole 311, one end of the pawl 32 is not forced, the pawl 32 rotates around the fixed column, one end of the pawl 32 is lifted, and the other end of the pawl 32 abuts against the gear shifting sleeve 31, so that the other end of the pawl 32 is engaged in the engagement groove 23 outside the gear ring 22.

[0047] The through hole 311 can be located at the middle position of the gear shifting sleeve 31, or can be located at the edge of the gear shifting sleeve 31. Exemplarily, as shown in Figure 9 The gear shifting sleeve 31 is used to lock one or two of the three gear rings 22, the gear shifting sleeve 31 is provided with three through holes 311 corresponding to the three gear rings 22, and each through hole 311 corresponds to one pawl 32. One of the three through holes 311 is located at the middle position of the gear shifting sleeve 31, and the other two through holes 311 are located at the edge of the gear shifting sleeve 31. The gear shifting is realized by the cooperation of the pawl 32 and the through hole 311, and the gear shifting can be realized without increasing the diameter of the gear shifting sleeve 31.

[0048] In an embodiment, the edge position of the through hole 311 is provided with a slope matching the pawl 32, when the shift sleeve 31 is rotated to the shift position, the pawl 32 first contacts the slope and then passes through the through hole 311, so that the pawl 32 can pass through the slope during the shift, which improves the smoothness of the shift process and reduces the shock during the shift.

[0049] In an embodiment, a spring is arranged between the pawl 32 and the fixed column, when the shift sleeve 31 is not rotated to the shift position, the spring is in a compressed state, when the shift sleeve 31 is rotated to the shift position, the pawl 32 passes through the through hole 311 under the action of the spring, so that the reliability of the shift process can be further improved.

[0050] In another embodiment, the shift sleeve 31 is provided with a protrusion matching the pawl 32, when the shift sleeve 31 is rotated to the shift position, the protrusion abuts against the pawl 32, so that the pawl 32 is clamped in the clamping groove 23.

[0051] In an embodiment, the outer side of the shift sleeve 31 is provided with a gear 312, and the shift mechanism 30 further comprises a first gear 33 engaged with the gear 312, and the shift sleeve 31 is used to rotate under the drive of the first gear 33. By driving the shift sleeve 31 to rotate through the first gear 33, the reliability of the shift can be improved.

[0052] In an embodiment, the shift mechanism 30 further comprises a control shaft 34, and the first gear 33 is installed at one end of the control shaft 34, so that the rotation of the first gear 33 can be controlled through the other end of the control shaft 34, and the size of the shift mechanism 30 in the radial direction is reduced.

[0053] In an embodiment, the shift mechanism 30 further comprises a second gear 35 installed at the other end of the control shaft 34, and the second gear 35 is used to rotate under the drive of a first motor 36, so as to drive the first gear 33 to rotate, thereby realizing automatic shift.

[0054] Among them, the first gear 33 and the second gear 35 can be assembled at both ends of the control shaft 34, or can be integrally formed with the control shaft 34.

[0055] In an embodiment, the number of pawls 32 is multiple, and each tooth ring 22 corresponds to two pawls 32. The two pawls 32 can be symmetrical about the central axis of the tooth ring 22, when the shift sleeve 31 is rotated to the shift position, the two pawls 32 are clamped on the tooth ring 22 at the same time, so that the clamping firmness of the pawl 32 can be improved, and the reliability of the center transmission is improved. It can be understood that the number of pawls 32 corresponding to each tooth ring 22 can also be greater than two.

[0056] In an embodiment, the transmission further comprises a wear-resistant member 40 sleeved outside the transmission mechanism 20, which can avoid friction between the ring gear 22 and external devices of the transmission, and improve the reliability of the transmission. The wear-resistant member 40 is provided with a mounting groove 41, and the shift sleeve 31 is mounted in the mounting groove 41, so that the size of the transmission in the radial direction is not increased after the shift sleeve 31 is mounted, and the volume of the transmission can be reduced.

[0057] In an embodiment, the radii of the plurality of ring gears 22 are the same, so as to facilitate machining of the ring gears 22 and the wear-resistant member 40. Exemplarily, as shown in Figure 6 and Figure 8 , the outer diameters of the plurality of ring gears 22 are the same, the wear-resistant member 40 is sleeved on the ring gears 22, and the mounting groove 41 is formed by a protrusion on the wear-resistant member 40, so that the shift sleeve 31 can be sleeved on the wear-resistant member 40 from one side.

[0058] In another embodiment, the radii of the plurality of ring gears 22 can also be different. Exemplarily, as shown in Figure 10 and Figure 11 , the outer diameters of the plurality of ring gears 22 are different, the mounting groove 41 is a groove located at the middle position of the wear-resistant member 40, and the shift sleeve 31 comprises two arc-shaped members, and the two arc-shaped members are clamped on the wear-resistant member 40.

[0059] In an embodiment, the planetary gear assembly 21 comprises a first planet carrier 211, a second planet carrier 212, a sun gear member 213, a first gear set 214 and a second gear set 215; the first planet carrier 211 is mounted on the transmission shaft 10, the second planet carrier 212 is mounted on the first planet carrier 211, the first gear set 214 is mounted on the first planet carrier 211, and the second gear set 215 is mounted on the second planet carrier 212; the sun gear member 213 is rotatably mounted on the transmission shaft 10 and is in mesh with the first gear set 214 and the second gear set 215. The first gear set 214 and the second gear set 215 are respectively in mesh with the inner portions of the corresponding ring gears 22, and the rotation of the different ring gears 22 is limited by the pawl 32, so as to change the transmission path of the planetary gear assembly 21 and obtain different transmission ratios. The sun gear member 213 can comprise one sun gear or a plurality of sun gears, and the plurality of sun gears can be integrally formed.

[0060] In an embodiment, the first gear set 214 comprises a plurality of first double planetary gears 2141, and each first double planetary gear 2141 comprises two planetary gears. In an embodiment, the second gear set 215 comprises a plurality of second double planetary gears 2151, and each second double planetary gear 2151 comprises two planetary gears. Exemplarily, as shown in Figure 12 and 13As shown, the sun gear member 213 includes a first sun gear 2131 and a second sun gear 2132, the first double planetary gear 2141 includes a first planetary gear 2142 and a second planetary gear 2143, the first planetary gear 2142 and the second planetary gear 2143 have different number of teeth, and the first planetary gear 2142 is engaged with the first sun gear 2131. The second double planetary gear 2151 includes a third planetary gear 2152 and a fourth planetary gear 2153, the third planetary gear 2152 and the fourth planetary gear 2153 have different number of teeth, and the third planetary gear 2152 is engaged with the second sun gear 2132. The outer side of the planetary gear assembly 21 is a first ring gear 221, a second ring gear 222, a third ring gear 223 and a fourth ring gear 224 in turn, the first planetary gear 2142 is engaged with the first ring gear 221, the second planetary gear 2143 is engaged with the second ring gear 222, the third planetary gear 2152 is engaged with the third ring gear 223, and the fourth planetary gear 2153 is engaged with the fourth ring gear 224. By using the double planetary gear, the machining process can be simplified, and the production cost can be reduced.

[0061] It can be understood that the first gear set 214 can also include two sets of planetary gears, and any two gears in the two sets of planetary gears are independent gears. The second gear set 215 can also include two sets of planetary gears, and any two gears in the two sets of planetary gears are independent gears. The first gear set 214 can also include multiple three-stage planetary gears, and the second gear set 215 can also include multiple three-stage planetary gears.

[0062] In an embodiment, the planetary gear assembly 21 further includes a first one-way clutch 216 installed between the first carrier 211 and the second carrier 212. The first one-way clutch 216 can be a roller one-way clutch, a spring one-way clutch or a friction plate one-way clutch. The first carrier 211 and the second carrier 212 can rotate synchronously or asynchronously under the action of the first one-way clutch 216. For example, when the rotation speed of the first carrier 211 is greater than that of the second carrier 212, the first carrier 211 and the second carrier 212 are combined to rotate synchronously, and when the rotation speed of the first carrier 211 is less than that of the second carrier 212, the first carrier 211 and the second carrier 212 are separated to rotate asynchronously. By setting the first one-way clutch 216, more transmission paths of the planetary gear assembly 21 can be realized without increasing the number of gears, and the size of the transmission can be reduced.

[0063] In an embodiment, the transmission further includes a housing 50, the transmission shaft 10 passes through the housing 50, and the number of ring gears 22 is four, of which the outer sides of three ring gears 22 are provided with pawls 32, and one ring gear 22 is installed on the housing 50, so that the ring gears 22 can be fixed by the housing 50, and the number of pawls 32 can be reduced.

[0064] In an embodiment, the transmission further comprises a second one-way clutch 60, which is installed between one of the gear rings 22 and the housing 50, and the gear ring 22 can be fixed on the housing 50 and not rotate, or can rotate relative to the housing 50 under the action of the second one-way clutch 60, so as to rotate under the drive of the planetary gear. Among them, the plurality of gear rings 22 are distributed along the axial direction of the transmission shaft 10, and the gear ring 22 installed on the housing 50 is the gear ring 22 located at one end of the transmission shaft 10.

[0065] Exemplarily, as shown in the figure, Figures 7 to 11 The first gear ring 221, the second gear ring 222, the third gear ring 223 and the fourth gear ring 224 are distributed along the axial direction of the transmission shaft 10, the second one-way clutch 60 is installed between the first gear ring 221 and the housing 50, and the shift mechanism 30 comprises three sets of pawls 32, which are the first pawl 321, the second pawl 322 and the third pawl 323 respectively. The first pawl 321, the second pawl 322 and the third pawl 323 are used to lock the second gear ring 222, the third gear ring 223 and the fourth gear ring 224 respectively.

[0066] When none of the three sets of pawls 32 locks the corresponding gear ring 22, the gear position of the transmission is one gear, the first planetary carrier 211 rotates clockwise under the drive of the transmission shaft 10, drives the first double planetary gear 2141 to rotate clockwise, and makes the first gear ring 221 have a clockwise rotating tendency. The first gear ring 221 is fixed on the housing 50 through the second one-way clutch 60, so the first double planetary gear 2141 rotates in the first gear ring 221. The sun gear member 213 rotates under the drive of the first double planetary gear 2141, thereby driving the second double planetary gear 2151 to rotate. Since the third gear ring 223 and the fourth gear ring 224 are not locked, the second double planetary gear 2151 drives the third gear ring 223 and the fourth gear ring 224 to rotate, so that the second planetary carrier 212 is not subjected to the force of the second double planetary gear 2151, and is combined with the first planetary carrier 211 under the action of the first one-way clutch 216, thereby rotating under the drive of the first planetary carrier 211. Therefore, when the gear position of the transmission is one gear, the transmission path of the transmission mechanism 20 is: transmission shaft 10-first planetary carrier 211-second planetary carrier 212-flyer.

[0067] When the second pawl 322 locks the third ring gear 223, the gearshift of the transmission is in the second gear, the first carrier 211 rotates clockwise under the drive of the transmission shaft 10, drives the first double planetary gear 2141 to rotate clockwise, and makes the first ring gear 221 have a tendency to rotate clockwise. The first ring gear 221 is locked on the housing 50 through the second one-way clutch 60, and therefore, the first double planetary gear 2141 rotates in the first ring gear 221. The sun gear 213 rotates under the drive of the first double planetary gear 2141, thereby driving the second double planetary gear 2151 to rotate in the third ring gear 223, and the second double planetary gear 2151 drives the second carrier 212 to rotate. At this time, the rotation speed of the first carrier 211 is less than that of the second carrier 212, and the first carrier 211 and the second carrier 212 are disconnected. Therefore, when the gearshift of the transmission is in the second gear, the transmission path of the transmission mechanism 20 is: the transmission shaft 10-the first carrier 211-the first double planetary gear 2141 (the first double planetary gear 2141 rotates in the first ring gear 221)-the sun gear 213-the second double planetary gear 2151 (the second double planetary gear 2151 rotates in the third ring gear 223)-the second carrier 212-the fly disc.

[0068] When the third pawl 323 locks the fourth ring gear 224, the gearshift of the transmission is in the third gear, the first carrier 211 rotates clockwise under the drive of the transmission shaft 10, drives the first double planetary gear 2141 to rotate clockwise, and makes the first ring gear 221 have a tendency to rotate clockwise. The first ring gear 221 is fixed on the housing 50 through the second one-way clutch 60, and therefore, the first double planetary gear 2141 rotates in the first ring gear 221. The sun gear 213 rotates under the drive of the first double planetary gear 2141, thereby driving the second double planetary gear 2151 to rotate in the fourth ring gear 224, and the second double planetary gear 2151 drives the second carrier 212 to rotate. At this time, the rotation speed of the first carrier 211 is less than that of the second carrier 212, and the first carrier 211 and the second carrier 212 are disconnected. Therefore, when the gearshift of the transmission is in the third gear, the transmission path of the transmission mechanism 20 is: the transmission shaft 10-the first carrier 211-the first double planetary gear 2141 (the first double planetary gear 2141 rotates in the first ring gear 221)-the sun gear 213-the second double planetary gear 2151 (the second double planetary gear 2151 rotates in the fourth ring gear 224)-the second carrier 212-the fly disc.

[0069] When the first pawl 321 and the third pawl 323 lock the second ring gear 222 and the fourth ring gear 224 respectively, the gearshift of the transmission is in the fourth gear, the first carrier 211 is driven to rotate clockwise by the transmission shaft 10, the first double planetary gear 2141 is driven to rotate in the second ring gear 222, the first double planetary gear 2141 drives the first ring gear 221 to rotate counterclockwise, so that the first ring gear 221 is disengaged from the housing 50, and the first ring gear 221 rotates relative to the housing 50. The sun gear 213 is driven to rotate by the first double planetary gear 2141, so as to drive the second double planetary gear 2151 to rotate in the fourth ring gear 224, and the second double planetary gear 2151 drives the second carrier 212 to rotate, at this time, the rotation speed of the first carrier 211 is less than that of the second carrier 212, and the first carrier 211 and the second carrier 212 are disengaged. Therefore, when the gearshift of the transmission is in the fourth gear, the transmission path of the transmission mechanism 20 is: the transmission shaft 10-the first carrier 211-the first double planetary gear 2141 (the first double planetary gear 2141 rotates in the second ring gear 222)-the sun gear 213-the second double planetary gear 2151 (the second double planetary gear 2151 rotates in the fourth ring gear 224)-the second carrier 212-the flying disc.

[0070] Exemplarily, as shown in Figure 8 The first ring gear 221, the second ring gear 222, the third ring gear 223 and the fourth ring gear 224 are distributed along the axial direction of the transmission shaft 10, the second one-way clutch 60 is installed between the fourth ring gear 224 and the housing 50, and the gearshift mechanism 30 includes three sets of pawls 32, which are the first pawl 321, the second pawl 322 and the third pawl 323 respectively. The first pawl 321, the second pawl 322 and the third pawl 323 are used to lock the first ring gear 221, the second ring gear 222 and the third ring gear 223 respectively.

[0071] When the three sets of pawls 32 do not lock the corresponding gear rings 22, the gear position of the transmission is first gear, the first carrier 211 rotates clockwise under the drive of the transmission shaft 10, and drives the first double planetary gear 2141 to rotate clockwise. The first gear ring 221 and the second gear ring 222 rotate freely under the drive of the first double planetary gear 2141, so that the sun gear member 213 is not subjected to the force of the first double planetary gear 2141, so that the force of the first double planetary gear 2141 is not transmitted to the second carrier 212 through the sun gear member 213 and the second double planetary gear 2151. Therefore, the first carrier 211 is locked with the second carrier 212 under the action of the first one-way clutch 216, and drives the second carrier 212 to rotate synchronously with the first carrier 211. At this time, the second carrier 212 drives the second double planetary gear 2151 to rotate, so that the fourth gear ring 224 has a tendency to rotate counterclockwise, and then the fourth gear ring 224 is combined with the housing 50, and the fourth gear ring 224 does not rotate. Therefore, when the gear position of the transmission is first gear, the transmission path of the transmission mechanism 20 is: the transmission shaft 10-the first carrier 211-the second carrier 212-the flying disc.

[0072] When the first pawl 321 and the third pawl 323 lock the first gear ring 221 and the third gear ring 223 respectively, the gear position of the transmission is second gear, the first carrier 211 rotates clockwise under the drive of the transmission shaft 10, and drives the first double planetary gear 2141 to rotate in the first gear ring 221. The sun gear member 213 rotates under the drive of the first double planetary gear 2141, thereby driving the second double planetary gear 2151 to rotate in the third gear ring 223, and the second double planetary gear 2151 drives the second carrier 212 to rotate. In this case, the rotational speed of the first carrier 211 is less than that of the second carrier 212, and the first carrier 211 and the second carrier 212 are separated. The fourth gear ring 224 is separated from the housing 50 under the drive of the second double planetary gear 2151 and rotates clockwise. Therefore, when the gear position of the transmission is second gear, the transmission path of the transmission mechanism 20 is: the transmission shaft 10-the first carrier 211-the first double planetary gear 2141 (the first double planetary gear 2141 rotates in the first gear ring 221)-the sun gear member 213-the second double planetary gear 2151 (the second double planetary gear 2151 rotates in the third gear ring 223)-the second carrier 212-the flying disc.

[0073] When the first pawl 321 locks the first ring gear 221, the gear shift of the transmission is in the third gear, the first planet carrier 211 rotates clockwise under the drive of the transmission shaft 10, and drives the first double planetary gear 2141 to rotate in the first ring gear 221. The sun gear 213 rotates under the drive of the first double planetary gear 2141, thereby driving the second double planetary gear 2151. In this case, the rotation speed of the first planet carrier 211 is less than that of the second planet carrier 212, and the first planet carrier 211 and the second planet carrier 212 are disengaged. The fourth ring gear 224 and the third ring gear 223 have a tendency to rotate counterclockwise, the fourth ring gear 224 is locked through the second one-way clutch 60 and the housing 50, the second double planetary gear 2151 rotates in the fourth ring gear 224, and the second double planetary gear 2151 drives the second planet carrier 212 to rotate. Therefore, when the gear shift of the transmission is in the third gear, the transmission path of the transmission mechanism 20 is: the transmission shaft 10-the first planet carrier 211-the first double planetary gear 2141 (the first double planetary gear 2141 rotates in the first ring gear 221)-the sun gear 213-the second double planetary gear 2151 (the second double planetary gear 2151 rotates in the fourth ring gear 224)-the second planet carrier 212-the fly disc.

[0074] When the second pawl 322 locks the second ring gear 222, the gear shift of the transmission is in the fourth gear, the first planet carrier 211 rotates clockwise under the drive of the transmission shaft 10, and drives the first double planetary gear 2141 to rotate in the second ring gear 222. The sun gear 213 rotates under the drive of the first double planetary gear 2141, thereby driving the second double planetary gear 2151. In this case, the rotation speed of the first planet carrier 211 is less than that of the second planet carrier 212, and the first planet carrier 211 and the second planet carrier 212 are disengaged. The fourth ring gear 224 and the third ring gear 223 have a tendency to rotate counterclockwise, the fourth ring gear 224 is locked through the second one-way clutch 60 and the housing 50, the second double planetary gear 2151 rotates in the fourth ring gear 224, and the second double planetary gear 2151 drives the second planet carrier 212 to rotate. Therefore, when the gear shift of the transmission is in the fourth gear, the transmission path of the transmission mechanism 20 is: the transmission shaft 10-the first planet carrier 211-the first double planetary gear 2141 (the first double planetary gear 2141 rotates in the second ring gear 222)-the sun gear 213-the second double planetary gear 2151 (the second double planetary gear 2151 rotates in the fourth ring gear 224)-the second planet carrier 212-the fly disc.

[0075] In other embodiments, the number of ring gears 22 can also be three or five, and the number of ring gears 22 and the gear shift are not limited in the application.

[0076] In an embodiment, the transmission further comprises an output assembly 70, which is sleeved on the transmission shaft 10 and connected with the planetary gear assembly 21. Exemplarily, the output assembly 70 is rotatably mounted on the transmission shaft 10 and fixedly mounted on the second planet carrier 212 and rotates under the drive of the second planet carrier 212. The output assembly 70 can be used to mount a flying disc to drive the bicycle forward by the flying disc.

[0077] In an embodiment, the transmission further comprises an output gear 80 mounted on the output assembly 70, which is used to rotate under the drive of a second motor 81 to drive the output assembly 70 to rotate, so that the bicycle has the function of electric assistance.

[0078] In an embodiment, the transmission further comprises a third one-way clutch 90 mounted between the output assembly 70 and the output gear 80. When the output assembly 70 rotates under the drive of the planetary gear assembly 21, the output gear 80 rotates out of synchronization with the output assembly 70 under the action of the third one-way clutch 90. When the output gear 80 rotates under the drive of the second motor 81, the output gear 80 drives the output assembly 70 to rotate under the action of the third one-way clutch 90.

[0079] The application also provides a vehicle comprising a frame and the above-mentioned transmission, which is mounted on the frame. The vehicle mounted with the above-mentioned transmission has a smaller volume and is convenient to install.

[0080] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A transmission characterized by, The transmission comprises a transmission shaft (10), a transmission mechanism (20) and a shift mechanism (30), the transmission shaft (10) is used to drive the transmission mechanism (20) to rotate; the transmission mechanism (20) comprises a planetary gear assembly (21) mounted on the transmission shaft (10) and a plurality of gear rings (22) mounted outside the planetary gear assembly (21), the outside of the gear ring (22) is provided with a clamping groove (23); the shift mechanism (30) comprises a shift sleeve (31) and a pawl (32), the shift sleeve (31) is sleeved outside the gear ring (22), and the pawl (32) is located between the shift sleeve (31) and the gear ring (22); the shift sleeve (31) is used to drive the pawl (32) to be clamped in the clamping groove (23) of one or more of the gear rings (22) when rotating to a shift position, so as to limit the rotation of the corresponding gear ring (22), thereby changing the transmission path of the transmission mechanism (20).

2. The transmission of claim 1, wherein, The shift sleeve (31) is provided with a through hole (311) matched with the pawl (32), and the pawl (32) is used to pass through the through hole (311) when the shift sleeve (31) rotates to the shift position, so that the pawl (32) is clamped in the clamping groove (23).

3. The transmission of claim 1, wherein, The outside of the shift sleeve (31) is provided with a gear tooth (312), and the shift mechanism (30) further comprises a first gear (33) engaged with the gear tooth (312), and the shift sleeve (31) is used to rotate under the drive of the first gear (33).

4. The transmission of claim 3, wherein, The shift mechanism (30) further comprises a control shaft (34), and the first gear (33) is mounted at one end of the control shaft (34).

5. The transmission of claim 4, wherein, The shift mechanism (30) further comprises a second gear (35) mounted at the other end of the control shaft (34), and the second gear (35) is used to rotate under the drive of a first motor, so as to drive the first gear (33) to rotate.

6. The transmission of claim 1, wherein, The number of the pawls (32) is a plurality, and each gear ring (22) corresponds to two pawls (32).

7. The transmission of claim 1, wherein, The transmission further comprises a wear-resistant part (40) sleeved outside the transmission mechanism (20), and the wear-resistant part (40) is provided with a mounting groove (41), and the shift sleeve (31) is mounted in the mounting groove (41).

8. The transmission of claim 1, wherein, The radii of the plurality of gear rings (22) are the same.

9. The transmission of any of claims 1-8, wherein, The planetary gear assembly (21) comprises a first planetary carrier (211), a second planetary carrier (212), a sun gear (213), a first gear set (214) and a second gear set (215); the first planetary carrier (211) is mounted on the transmission shaft (10), the second planetary carrier (212) is mounted on the first planetary carrier (211), the first gear set (214) is mounted on the first planetary carrier (211), and the second gear set (215) is mounted on the second planetary carrier (212); the sun gear (213) is rotatably mounted on the transmission shaft (10) and meshes with the first gear set (214) and the second gear set (215).

10. The transmission of claim 9, wherein, The first gear set (214) comprises a plurality of first double planetary gears (2141); and / or, the second gear set (215) comprises a plurality of second double planetary gears (2151).

11. The transmission of claim 9, wherein, The planetary gear assembly (21) further comprises a first one-way clutch (216) mounted between the first planetary carrier (211) and the second planetary carrier (212).

12. The transmission of claim 9, wherein, The transmission further comprises a housing (50), the transmission shaft (10) passes through the housing (50), the number of the ring gears (22) is four, the outer sides of three of the ring gears (22) are provided with the pawls (32), and one of the ring gears (22) is mounted on the housing (50).

13. The transmission of claim 12, wherein, The transmission further comprises a second one-way clutch (60) mounted between one of the ring gears (22) and the housing (50).

14. The transmission of claim 1, wherein, The transmission further comprises an output assembly (70) sleeved on the transmission shaft (10) and connected with the planetary gear assembly (21).

15. The transmission of claim 14, wherein, The transmission further comprises an output gear (80) mounted on the output assembly (70), the output gear (80) is used to rotate under the driving of a second motor, so as to drive the output assembly (70) to rotate.

16. The transmission of claim 15, wherein, The transmission further comprises a third one-way clutch (90) mounted between the output assembly (70) and the output gear (80).

17. A vehicle characterized by comprising: A vehicle frame and the transmission according to any one of claims 1 to 16 are provided, and the transmission is mounted on the vehicle frame.

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