CN214999165U - Clutch executing device and system for bicycle transmission - Google Patents
Clutch executing device and system for bicycle transmission Download PDFInfo
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- CN214999165U CN214999165U CN202120670756.2U CN202120670756U CN214999165U CN 214999165 U CN214999165 U CN 214999165U CN 202120670756 U CN202120670756 U CN 202120670756U CN 214999165 U CN214999165 U CN 214999165U
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Abstract
The utility model relates to a clutch actuating device and a system for a bicycle speed changer, wherein the clutch actuating device comprises a cam shaft; the camshaft also comprises a driving assembly and a speed reducing gear train which are arranged in the camshaft; the speed reducing gear train decelerates the driving assembly, so that the torque at the output end of the speed reducing gear train is larger than the torque at the input end of the speed reducing gear train; by adopting the scheme, a user can more easily perform gear shifting operation in the using process; through setting up drive assembly and speed reduction subassembly in the camshaft, can make clutch structure appearance more succinct to can not influence drive assembly at the outside mounting means of clutch because of the appearance of clutch gear and other parts, the drive assembly's of being convenient for arrange, the user controls more easily, and it is efficient to shift gears.
Description
Technical Field
The utility model relates to a clutch technical field, more specifically say, relate to a separation and reunion final controlling element and system for bicycle derailleur.
Background
The gearbox of the multi-speed bicycle can enable a bicycle user to select a proper transmission ratio according to physical strength and road conditions, and further help the human body to maintain the pedaling frequency corresponding to the maximum power output, which is particularly important for competition. The clutch is usually the core component of the gearbox, and the criteria for evaluating the quality of the design level of the clutch are as follows: reliability, shifting efficiency (especially in the case of user pedaling), design complexity, manufacturing costs, manufacturability, certain clutches also take into account the amount of lost motion between gears, especially in scenarios where torque is to be transmitted immediately after a shift, such as steep uphill grades.
The rotary gearbox clutch is a mechanism which is started to be applied to the field of bicycles in the last decade, and is mostly applied to the field of middle gearboxes. This type of clutch, without being strictly limited in size, allows the clutching action to be carried out smoothly when the user steps on it, which is of great importance for the clutch of racing type mountain bikes, which compete for seconds, because of the efficiency of operation in switching gears frequently and rapidly. The conventional clutch is difficult to normally perform actions when a user pedals the clutch due to the small size, and the existing clutch has the defects of small number of ratchets corresponding to each clutch gear, small volume and poor load capacity. The clutch mechanism is good in application trend and high in improvement potential in the market at present.
US patent (US9163702) discloses a gear change device and transmission, wherein the camshaft and the clutch main shaft are directly connected to the ring gear of the planetary gear train, the two planetary gear trains run at the same angular speed and direction and have the same number of teeth of the sun gear, the planet gear and the main ring gear, the ring gear of the planetary gear train where the sun gear on the camshaft is located is fixed at ordinary times, and when the gear shifter of the bicycle is operated, the ring gear can be rotated at a certain angle relative to the gear box body. However, the clutch large shaft and the cam shaft used in cooperation with the clutch actuating mechanism (two planetary gear trains) are small in size, but the size of the clutch actuating mechanism is too compact, so that the pawl cannot be easily disengaged from the gear when being trampled, the gear ring accelerates the sun gear when shifting gears, the input torque of the gear ring part is larger than the output torque of the sun gear, a user is labor-consuming to control, the shifting efficiency is low, and if a motor system needs to be added, the installation position of the motor is troublesome to set, and the arrangement of the motor is inconvenient.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that solve lies in current rotary type gearbox clutch existence and controls hard, shifts inefficiency, arranges shortcoming such as the space is little, to the above-mentioned defect of prior art, provides a separation and reunion final controlling element and system for bicycle derailleur.
The utility model provides a technical scheme that its technical problem adopted is: a clutch actuator for a bicycle transmission is constructed, including a camshaft; the camshaft is characterized by also comprising a driving assembly and a speed reducing gear train which are arranged in the camshaft; the speed reduction gear train is through right drive assembly slows down, makes speed reduction gear train output end moment of torsion is greater than speed reduction gear train input end moment of torsion.
Further, the reduction gear train comprises a reduction sun gear, a reduction gear ring and a reduction planet gear; the reduction sun gear is in meshed connection with the reduction planet gear; the reduction gear ring is in meshed connection with the reduction planet gear.
Further, the reduction gear train further comprises a reduction planet carrier; a first mounting position used for containing the speed reduction planet wheel is arranged in the speed reduction planet carrier.
Further, the drive assembly includes: the motor comprises a motor frame and a motor arranged in the motor frame; an installation cavity for accommodating the motor frame is arranged in the cam shaft; the output end of the motor is connected with the speed reduction sun gear; the speed reduction gear ring is arranged on the motor frame.
Furthermore, a first wheel train is arranged in the mounting cavity; the first gear train comprises a first sun gear, a first gear ring and a first planet gear; the first sun gear and the reduction planet carrier are integrally arranged; the first gear ring is arranged on the camshaft; the first planet wheel is respectively meshed with the first sun gear and the first gear ring.
Further, a clutch large shaft is arranged on the outer side of the cam shaft; a second wheel train is arranged in the clutch large shaft; the second gear train comprises a second gear ring and a second planet wheel; the second gear ring is connected with the clutch large shaft; the second planet wheel is meshed with the second gear ring.
Further, a common planet carrier is arranged between the first gear train and the second gear train; the common planet carrier is connected with the cam shaft and the first sun gear through bearings respectively.
Further, the second gear train further comprises a second sun gear; the second sun gear is connected with the common planet carrier through a bearing; the second sun gear is in meshed connection with the second planet gear.
Furthermore, a second mounting position is arranged in the common planet carrier; the first planet wheel and the second planet wheel are both arranged in the second mounting position; the first planet wheel and the second planet wheel are coaxially arranged.
The application provides a clutch system of bicycle derailleur, includes clutch shaft sleeve, clutch gear and pawl group, still includes the separation and reunion final controlling element of any one of the preceding.
The beneficial effects of the utility model reside in that: the input rotating speed of the driving assembly is reduced by the speed reduction assembly, so that the torque of the output end of the speed reduction gear train is larger than the torque of the input end of the speed reduction gear train, and a user can more easily perform gear shifting operation in the using process; through setting up drive assembly and speed reduction subassembly in the camshaft, can make clutch structure appearance more succinct to can not influence drive assembly at the outside mounting means of clutch because of the appearance of clutch gear and other parts, the drive assembly's of being convenient for arrange, the user controls more easily, and it is efficient to shift gears.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work according to the drawings:
fig. 1 is a schematic view of an internal structure of a clutch actuator for a bicycle transmission according to an embodiment of the present invention;
fig. 2 is an enlarged schematic view of a point a in fig. 1 according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a clutch actuator for a bicycle transmission according to an embodiment of the present invention;
FIG. 4 is an exploded view of a clutch actuator for a bicycle transmission in accordance with an embodiment of the present invention;
FIG. 5 is a schematic mechanical movement diagram of a clutch actuator for a bicycle transmission in accordance with an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a clutch system for a bicycle transmission according to an embodiment of the present invention.
In the figure, 5, a common carrier; 6. a camshaft; 7. a clutch large shaft; 8. a clutch hub; 9. a pawl group; 11. a motor; 12. a motor frame; 21. a reduction sun gear; 22. a reduction gear ring; 23. a deceleration planet wheel; 24. a reduction planet carrier; 31. a first sun gear; 32. a first ring gear; 33. a first planet gear; 41. a second sun gear; 42. a second ring gear; 43. a second planet wheel; 51. a second mounting location; 52. a fifth bearing; 61. a first bearing; 62. a mounting cavity; 71. a second bearing; 81. a clutch gear; 91. a pawl; 92. a pawl rotation shaft; 93. a pawl rotation bearing; 241. a first mounting location; 311. a third bearing; 411. and a fourth bearing.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 to 4, a clutch actuator for a bicycle transmission according to a preferred embodiment of the present invention includes a cam shaft 6; also included are a drive assembly and a reduction train disposed in the camshaft 6; the speed reducing gear train decelerates the driving assembly, so that the torque of the output end of the speed reducing gear train is larger than the torque of the input end of the speed reducing gear train.
When the user does not perform a shifting operation, the camshaft 6 and the clutch large shaft 7 outside the camshaft 6 rotate at the same angular velocity as the gears outside the clutch large shaft 7. The drive assembly and the reduction train remain stationary.
When a user shifts, the driving assembly receives a control signal transmitted by the user through the speed change system controller, and then drives the reduction gear train to rotate, and the reduction gear train performs speed reduction output on the rotating speed input of the driving assembly, so that the angular displacement of the cam shaft 6 is changed relative to the clutch main shaft 7. When the camshaft 6 rotates to a certain angle relative to the clutch large shaft 7, gear shifting is completed.
The input rotating speed of the driving assembly is reduced by the speed reduction assembly, so that the torque of the output end of the speed reduction gear train is larger than the torque of the input end of the speed reduction gear train, and a user can more easily perform gear shifting operation in the using process; through setting up drive assembly and speed reduction subassembly in the camshaft, can make clutch structure appearance more succinct to can not influence drive assembly at the outside mounting means of clutch because of the appearance of clutch gear and other parts, the drive assembly's of being convenient for arrange, the user controls more easily, and it is efficient to shift gears.
In a further embodiment, the reduction train comprises a reduction sun wheel 21, a reduction ring wheel 22 and a reduction planet wheel 23; the reduction sun gear 21 is meshed with the reduction planet gear 23; the reduction gear 22 is in meshing connection with a reduction planet 23.
The reduction sun gear 21 and the motor 11 are connected by a coupling or the like. The reduction gear 22 is connected with the motor frame 12 through splines, snap springs and the like. The reduction sun gear 21, the reduction ring gear 22 and the reduction planet gears 23 are in conventional gear fit with each other.
In a further embodiment, the reduction train further comprises a reduction planet carrier 24; a first mounting location 241 for accommodating the reduction planet wheel 23 is provided in the reduction planet carrier 24. The reduction planet wheel 23 is arranged in the first mounting position 241, a first rotating shaft is arranged in the first mounting position 241, the first rotating shaft penetrates through the reduction planet wheel 23, and the edge of the reduction planet wheel 23 penetrates through the reduction planet carrier 24.
In a further embodiment, the drive assembly comprises: a motor frame 12, and a motor 11 provided in the motor frame 12; an installation cavity 62 for accommodating the motor frame 12 is arranged in the cam shaft 6; the output end of the motor 11 is connected with the reduction sun gear 21; the reduction gear ring 22 is provided on the motor mount 12.
Wherein, motor 11 and motor frame 12 realize axial and radial cooperation through modes such as jump ring and screw, are connected through first bearing 61 between motor frame 12 and the camshaft 6, are connected through second bearing 71 between camshaft 6 and the clutch macroaxis 7. The motor 11 is arranged in the motor frame 12, and the motor frame 12 is arranged in the cam shaft 6, so that the appearance of the clutch is simplified.
In a further embodiment, a first train of wheels is provided in the mounting cavity 62; the first train comprises a first sun gear 31, a first ring gear 32 and a first planet gear 33; the first sun gear 31 is provided integrally with the reduction carrier 24; the first ring gear 32 is provided on the camshaft 6; the first planetary gears 33 are in meshing engagement with the first sun gear 31 and the first ring gear 32, respectively. The first gear ring 32 and the camshaft 6 are connected by means of splines, snap springs and the like. The first sun gear 31, the first ring gear 32 and the first planet gear 33 are conventional gear-wheel meshes.
In a further embodiment, a clutch large shaft 7 is arranged outside the camshaft 6; a second wheel train is arranged in the clutch large shaft 7; the second train comprises a second ring gear 42 and second planet gears 43; the second gear ring 42 is connected with the clutch large shaft 7; the second planet wheels 43 are in meshing connection with the second ring gear 42. The second ring gear 42 is connected with the clutch large shaft 7 through a spline, a clamping shaft and the like.
In a further embodiment, a common planet carrier 5 is provided between the first and second wheel trains; the common carrier 5 is connected to the camshaft 6 via a fifth bearing 52 and to the first sun gear via a third bearing 311. When the user does not perform a shifting operation, the common carrier 5 is driven by the clutch large shaft 7 to rotate in the same direction.
In a further embodiment, the second gear train further comprises a second sun gear 41; the second sun gear 41 is connected with the common carrier 5 through a fourth bearing 411; the second sun wheel 41 is in meshing connection with the second planet wheels 43. The second sun gear 41 is fixed and does not rotate with the rotation of the second planet gears 43 and the common carrier 5.
In a further embodiment, a second mounting location 51 is provided in the common planet carrier 5; the first planet wheel 33 and the second planet wheel 43 are both arranged in the second mounting location 51; the first planet wheel 33 and the second planet wheel 43 are arranged coaxially. A second rotating shaft is arranged in the second mounting position 51, wherein the second rotating shaft sequentially passes through the first planet wheel 33 and the second planet wheel 43, so that the first planet wheel 33 and the second planet wheel 43 can respectively rotate relative to the second rotating shaft.
In the above embodiment, the first planetary gear 33 and the second planetary gear 43 have the same number of teeth, the first sun gear 31 and the second sun gear 41 have the same number of teeth, and the first ring gear 32 and the second ring gear 42 have the same number of teeth, so that the camshaft 6 and the clutch large shaft 7 can rotate at the same angular speed when a user is not performing a shifting operation.
In summary, as shown in fig. 5, the working process of the present application is:
when the user does not perform a shifting operation, the cam shaft 6 and the clutch large shaft 7 rotate at the same angular speed as the gear outside the clutch large shaft 7. The reduction ring gear 22, the reduction planet gears 23, and the reduction sun gear 21 are in a stationary state, and therefore the first sun gear 31 on the reduction carrier 24 is also in a stationary state, and the second sun gear 41 is stationary, and the common carrier 5 is driven by the clutch large shaft 7 to rotate in the same direction.
When a user performs a gear shifting operation, the motor 11 receives a control signal transmitted by the user through the speed change system controller, and further drives the reduction sun gear 21 to rotate, and under the coordination of the reduction sun gear 21, the reduction gear ring 22 and the reduction planet gear 23, the first sun gear 31 on the reduction planet carrier 24 performs speed reduction output on the rotation speed input of the reduction sun gear 21, that is, the rotation speed input is output to the first sun gear 31 on the reduction planet carrier 24, and the superposition of the influence of the rotation of the first sun gear 31 and the rotation of the common planet carrier 5 on the angular displacement of the gear ring of the camshaft 6 causes the angular displacement change of the camshaft 6 relative to the clutch main shaft 7. Before the gear shifting operation is completed, the camshaft 6 and the clutch shaft 7 move at nearly the same angular speed (i.e. the relative angular speed of the camshaft 6 and the clutch shaft 7 is not 0), but the change of angular displacement from the first sun gear 31 causes the relative rotation between the camshaft 6 and the clutch shaft 7, and when the relative movement reaches a certain angle, the gear shifting is completed, which is usually represented by the fact that the camshaft 6 jacks up and retracts different pawls on the clutch shaft 7 during the gear shifting process, and then a different clutch gear 81 is selected to be connected with the clutch shaft 7.
In the above embodiment, the reduction sun gear 21, the reduction ring gear 22, the reduction planet gear 23 and the reduction planet carrier 24 constitute a planetary gear train mechanism, wherein the reduction sun gear 21 is an input end of the planetary gear train mechanism, and the reduction planet carrier 24 is an output end of the planetary gear train. The deceleration process of the planetary gear train mechanism is as follows:
the central speed of the reduction planet wheel 23 and the contact point speed of the reduction sun wheel 21 and the planet wheel satisfy the following relational expression (1):
V1＝0.5V2 (1)；
wherein, V1For reducing the central speed of the planet gear, V2In order to reduce the speed of the contact point of the sun wheel and the planet wheel.
The speed of the contact point of the reduction sun wheel and the planet wheel, the angular speed of the reduction sun wheel and the radius of the reduction sun wheel satisfy the following relational expression (2):
V2＝w1r1 (2)；
wherein, w1To slow down the sun wheel angular velocity, r1To slow the sun gear radius.
The central speed of the reduction planet wheel, the angular speed of the reduction planet carrier, the radius of the reduction sun wheel and the radius of the reduction planet wheel satisfy the following relational expression (3):
V1＝w2(r1+r2) (3)；
wherein, w2To slow down the angular velocity of the carrier, r2Is the radius of the reduction planet gear.
The diameter of the planet wheel is set as d2Diameter d of planet wheel2Radius r of planetary gear2Satisfies the following relation (4):
d2＝2r2 (4)。
by combining the above relations (1), (2), (3) and (4),
the transmission ratio of the speed reducing mechanism satisfies the following relational expression (5):
based on the relation (5), the transmission ratio of the planetary gear train is larger than 1, namely the input speed of the reduction sun gear is larger than the output speed of the reduction planetary carrier, the moment on the input end is smaller than the moment on the output end, and the reduction and the increase of the moment on the output end are realized.
The application provides a transmission clutching system, available in conjunction with fig. 1-6, comprising a clutch sleeve 8, a clutch gear 81 and a pawl set 9, and further comprising a clutch actuation device as in any one of the preceding.
The clutch shaft sleeve 8 is sleeved on the clutch large shaft 7, the clutch gear 81 is arranged on the clutch shaft sleeve 8, the pawl group 9 is arranged on the clutch large shaft 7, in the embodiment, the pawl group 9 comprises pawls 91, a pawl rotating shaft 92 and a pawl rotating bearing 93, and the pawl group 9 can be lifted and connected with or lowered down and disconnected from the clutch gear 81 in the gear shifting process (namely, the gear shift system controller controls the cam shaft 6 and the clutch large shaft 7 to rotate relatively).
In one embodiment, when the pawls are not engaged with bearings or other structures inside one or more clutch gears 81, the clutch gears 81 can be driven by other shafting gears (typically fixed gears on the drive shaft) engaged with the pawls, so that the clutch gears 81 roll or slide outside the clutch shaft 7 sleeve, but the clutch gears 81 do not transmit torque to the clutch shaft 7; when the pawls are connected with bearings or other structures inside one or more clutch gears 81, the clutch gears 81 can be driven by other shafting gears (generally fixed gears on the transmission shaft) matched with the clutch gears 81 for transmission, and can transmit torque to the clutch large shaft 7, and then the other clutch gears 81 or the clutch large shaft 7 output the torque to the next-stage transmission module. When different clutch gears 81 and their corresponding pawls are connected, different gear ratios can be produced, thereby helping the user to flexibly shift gears according to the terrain.
In conclusion, the motor 11 is arranged in the motor frame 12, so that the appearance of the clutch is simplified. Meanwhile, the clutch is usually arranged in a front triangle of the frame, and the gear ring is connected with the camshaft 6 and the clutch large shaft 7, so that the design space of the camshaft 6 is not limited, 12-speed gears or even more gears can be completed in one rotation of the camshaft 6, the processing technology of the camshaft 6 is simplified, and the production cost and the rejection rate are reduced. Further, this application can make camshaft 6 and clutch macroaxis 7 accomplish in rotation or static and shift gears, can make promptly between camshaft 6 and the clutch macroaxis 7 no matter all produce relative rotation in motion or static, slow down the mesh that reaches the gear shift through the sun wheel to the ring gear, and the input moment of torsion is less than the output moment of torsion, is controlled more easily, shifts gears more easily, and it is efficient to shift gears.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (10)
1. A clutch actuator for a bicycle transmission includes a camshaft; the method is characterized in that: the camshaft is characterized by also comprising a driving assembly and a speed reducing gear train which are arranged in the camshaft; the speed reduction gear train is through right drive assembly slows down, makes speed reduction gear train output end moment of torsion is greater than speed reduction gear train input end moment of torsion.
2. The clutched actuator for a bicycle transmission of claim 1, wherein the reduction train comprises a reduction sun, a reduction ring and a reduction planet; the reduction sun gear is in meshed connection with the reduction planet gear; the reduction gear ring is in meshed connection with the reduction planet gear.
3. The clutched actuator for a bicycle transmission of claim 2, wherein the reduction train further comprises a reduction carrier; a first mounting position used for containing the speed reduction planet wheel is arranged in the speed reduction planet carrier.
4. The clutched actuator for a bicycle shifter of claim 3, wherein the drive assembly comprises: the motor comprises a motor frame and a motor arranged in the motor frame; an installation cavity for accommodating the motor frame is arranged in the cam shaft; the output end of the motor is connected with the speed reduction sun gear; the speed reduction gear ring is arranged on the motor frame.
5. The clutched actuator for a bicycle transmission of claim 4, wherein a first gear train is provided in the mounting cavity; the first gear train comprises a first sun gear, a first gear ring and a first planet gear; the first sun gear and the reduction planet carrier are integrally arranged; the first gear ring is arranged on the camshaft; the first planet wheel is respectively meshed with the first sun gear and the first gear ring.
6. The clutch actuator for a bicycle shifter according to claim 5, wherein a clutch large shaft is provided outside the cam shaft; a second wheel train is arranged in the clutch large shaft; the second gear train comprises a second gear ring and a second planet wheel; the second gear ring is connected with the clutch large shaft; the second planet wheel is meshed with the second gear ring.
7. A clutch actuator for a bicycle transmission according to claim 6, characterised in that a common planet carrier is provided between the first and second gear trains; the common planet carrier is connected with the cam shaft and the first sun gear through bearings respectively.
8. The clutched actuator for a bicycle transmission of claim 7, wherein the second train of wheels further comprises a second sun gear; the second sun gear is connected with the common planet carrier through a bearing; the second sun gear is in meshed connection with the second planet gear.
9. The clutched actuator device for a bicycle transmission of claim 8, wherein a second mounting location is provided in the common carrier; the first planet wheel and the second planet wheel are both arranged in the second mounting position; the first planet wheel and the second planet wheel are coaxially arranged.
10. A clutching system for a bicycle transmission comprising a clutch sleeve, a clutch gear and a pawl set, further comprising a clutch actuator as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120670756.2U CN214999165U (en) | 2021-04-01 | 2021-04-01 | Clutch executing device and system for bicycle transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120670756.2U CN214999165U (en) | 2021-04-01 | 2021-04-01 | Clutch executing device and system for bicycle transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214999165U true CN214999165U (en) | 2021-12-03 |
Family
ID=79095626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120670756.2U Active CN214999165U (en) | 2021-04-01 | 2021-04-01 | Clutch executing device and system for bicycle transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214999165U (en) |
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2021
- 2021-04-01 CN CN202120670756.2U patent/CN214999165U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220525 Address after: 239000 southwest corner of the intersection of Huizhou road and Xin'anjiang Road, Chuzhou City, Anhui Province Patentee after: Hepis precision machinery (Chuzhou) Co.,Ltd. Address before: 541000 Room 501, unit 3, building 1, 158 Zhongshan North Road, Diecai District, Guilin City, Guangxi Zhuang Autonomous Region Patentee before: Tang Yuyang |
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| TR01 | Transfer of patent right |