CN212500855U - Centrally-mounted driving mechanism and power-assisted bicycle - Google Patents
Centrally-mounted driving mechanism and power-assisted bicycle Download PDFInfo
- Publication number
- CN212500855U CN212500855U CN201922420305.9U CN201922420305U CN212500855U CN 212500855 U CN212500855 U CN 212500855U CN 201922420305 U CN201922420305 U CN 201922420305U CN 212500855 U CN212500855 U CN 212500855U
- Authority
- CN
- China
- Prior art keywords
- gear
- frame
- drive mechanism
- mounting part
- middle shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a middle-mounted driving mechanism used for a power-assisted bicycle, which comprises a middle shaft, a chain wheel and a motor; the middle shaft is inserted in a shaft hole of a middle frame of the power-assisted bicycle; an auxiliary gear is sleeved and fixed on the middle shaft; the chain wheel comprises a mounting part positioned at the central position and a tooth part fixed on the periphery of the mounting part; the mounting part axially protrudes and forms an accommodating cavity, and the tooth part is positioned at one end of the mounting part close to the frame in the axial direction; the mounting part is sleeved on the middle shaft and is fixedly connected with the auxiliary gear; the auxiliary gear is positioned in the accommodating cavity; the motor is assembled on the frame, and the motor drives the auxiliary gear to rotate through the speed reduction assembly. In this put actuating mechanism, tooth portion reaches the effect of crossing auxiliary gear and pressing close to the frame in the chain wheel, effectively shortens the distance of tooth portion and frame, prevents that the distance between chain and the frame is too far away. The utility model discloses still disclose a moped, it is applied above-mentioned and put actuating mechanism in, avoids chain and frame distance too far.
Description
Technical Field
The utility model relates to a bicycle technical field, more specifically say, relate to an in put actuating mechanism, still relate to a power-assisted bicycle.
Background
The power-assisted bicycle takes a battery as an auxiliary power source, is provided with a motor, is provided with a power auxiliary system, and can realize the integration of manual riding and motor power assistance.
In the field of power-assisted bicycles, a motor is mounted in the middle of a bicycle frame and forms a centrally-mounted drive mechanism. The middle-mounted driving mechanism comprises a motor and a middle shaft which are arranged on the frame, the middle shaft is inserted into a shaft sleeve, and the shaft sleeve is accommodated in a shaft hole of the frame and fixed through a fastening metal piece; the middle shaft is sleeved with an auxiliary gear and a chain wheel which are coaxially arranged, the auxiliary gear is matched with the speed reducing mechanism, and the chain wheel is used for assembling a chain; the auxiliary gear occupies the axial space of the middle shaft, so that the chain wheel is far away from the frame, and the distance between the plane of the chain matched with the chain wheel and the frame is overlarge.
In summary, how to reduce the distance between the chain wheel and the frame of the power-assisted bicycle and prevent the chain from being too far away from the frame is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an in put actuating mechanism for moped, its chain wheel includes installation department and tooth portion, and the installation department is used for holding auxiliary gear, and tooth portion strides auxiliary gear and presses close to the frame, and the distance shortens between tooth portion and the frame, effectively reduces the distance between chain and the frame. The utility model also provides a moped, its uses above-mentioned put actuating mechanism in, avoids chain and frame distance too far.
In order to achieve the above object, the utility model provides a following technical scheme:
a centrally-mounted drive mechanism for a power-assisted bicycle, comprising:
the middle shaft is inserted into a shaft hole of a middle frame of the moped; an auxiliary gear is sleeved and fixed on the middle shaft;
the chain wheel comprises a mounting part positioned at the central position and a tooth part fixed on the periphery of the mounting part; the mounting part axially protrudes and forms an accommodating cavity, and the tooth part is positioned at one end of the mounting part close to the frame in the axial direction; the auxiliary gear is positioned in the accommodating cavity; the mounting part is sleeved on the middle shaft and is fixedly connected with the auxiliary gear;
the motor is assembled on a frame of the power-assisted bicycle and drives the auxiliary gear to rotate through the speed reduction assembly.
Preferably, in the above mid-mounted driving mechanism, the reduction assembly is a three-stage parallel gear reduction assembly, and includes:
the first gear and the second gear are arranged on the frame in a manner that the first gear and the second gear can rotate around the axes of the first gear and the second gear;
the dual gear can be arranged on the frame in a manner of rotating around the axis of the dual gear;
the axis of the pivot of the motor, the axis of the first gear, the axis of the duplicate gear and the axis of the middle shaft are parallel to each other; an output gear arranged on the pivot is meshed with the first gear to form a primary reduction gear pair; the second gear is meshed with a gear at one end of the duplicate gear to form a two-stage reduction gear pair; and a gear at the other end of the duplicate gear is meshed with the auxiliary gear to form a three-stage reduction gear pair.
Preferably, in the above mid-set driving mechanism, the gear at the other end of the duplicate gear is located in the accommodating cavity.
Preferably, the mid-drive mechanism further includes a housing, and the motor, the first gear, the second gear, and the duplicate gear are respectively assembled to the frame through the housing.
Preferably, the central driving mechanism further comprises a torque sensing assembly for detecting a torque of the central shaft and sending a torque sensing signal to the controller, and the controller controls the motor according to the torque sensing signal.
Preferably, in the above mid-drive mechanism, the torque sensor assembly includes:
the elastic body is sleeved on the middle shaft and is connected with the middle shaft through a key; the elastic body is fixedly connected with the frame;
the induction sheet is attached to the elastic body and sends the torsion induction signal to the controller.
Preferably, in the above mid-set driving mechanism, the elastic body and a one-way clutch coupling support of the power-assisted bicycle are of an integrated structure, and the one-way clutch coupling support is fixed to the frame.
Preferably, in the centrally mounted drive mechanism, the toothed portion includes a plurality of toothed disks, and each of the toothed disks is provided at an interval in an axial direction of the mounting portion.
Preferably, the middle driving mechanism further comprises a shaft sleeve, and the shaft sleeve accommodates the middle shaft; the shaft sleeve penetrates through the shaft hole and is fixed through a metal fastener.
A power-assisted bicycle comprises a middle-mounted driving mechanism, wherein the middle-mounted driving mechanism is the middle-mounted driving mechanism in any one of the technical schemes.
The utility model provides a middle-arranged driving mechanism which is used for a power-assisted bicycle and comprises a middle shaft, a chain wheel and a motor; the middle shaft is inserted in a shaft hole of a middle frame of the power-assisted bicycle; an auxiliary gear is sleeved and fixed on the middle shaft; the chain wheel comprises a mounting part positioned at the central position and a tooth part fixed on the periphery of the mounting part; the mounting part axially protrudes and forms an accommodating cavity, and the tooth part is positioned at one end of the mounting part close to the frame in the axial direction; the mounting part is sleeved on the middle shaft and is fixedly connected with the auxiliary gear; the auxiliary gear is positioned in the accommodating cavity; the motor is assembled on the frame, and the motor drives the auxiliary gear to rotate through the speed reduction assembly.
The utility model provides an among the centrally-mounted drive mechanism, the chain wheel includes installation department and tooth portion, and wherein, the chamber that holds of installation department is along axial protrusion and hold auxiliary gear, makes tooth portion cross auxiliary gear and presses close to the frame, neither influences the installation of the whole transmission structure of motor effect among the moped, effectively shortens the distance of tooth portion and frame again, prevents that the distance between chain and the frame is too far away.
The utility model also provides a moped, its uses above-mentioned put actuating mechanism in, avoids chain and frame distance too far.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that 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 according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a centrally-mounted driving structure according to an embodiment of the present invention;
wherein, in fig. 1:
a pivot 101; a double gear 102; an auxiliary gear 103; an elastomer 104; a right crank 105; the crankset 106; the tooth 161; a mounting portion 162; a shaft sleeve 107; the middle state 108; a lock nut 109; a gasket 110; a left crank 111; an electric motor 112.
Detailed Description
The embodiment of the utility model discloses put actuating mechanism in for power assisted bicycle, its chain wheel includes installation department and tooth portion, and the installation department is used for holding auxiliary gear, and tooth portion strides across auxiliary gear and presses close to the frame, and the distance shortens between tooth portion and the frame, effectively reduces the distance between chain and the frame. The embodiment of the utility model provides a still disclose a moped, put actuating mechanism in its applied above-mentioned, avoid chain and frame distance too far.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a middle driving mechanism for a power assisted bicycle, including a middle axle 108, a chain wheel 106 and a motor 112; the middle shaft 108 is inserted into a shaft hole of a middle frame of the moped; the auxiliary gear 103 is sleeved and fixed on the middle shaft 108; the chain wheel 106 comprises a chain wheel which comprises a mounting part 162 positioned at the central position and a tooth part 161 fixed on the outer periphery of the mounting part 162; the mounting portion 162 protrudes in the axial direction and forms an accommodating chamber, and the tooth portion 161 is located at one end of the mounting portion 162 near the frame in the axial direction; the mounting part 162 is sleeved on the middle shaft 108 and is fixedly connected with the auxiliary gear 103; the auxiliary gear 103 is positioned in the accommodating cavity; the motor 112 is assembled on the frame, and the motor 112 drives the auxiliary gear 103 to rotate through the speed reducing assembly.
The embodiment of the utility model provides an in put actuating mechanism, chain wheel 106 includes installation department 162 and tooth portion 161, and wherein, the chamber that holds of installation department 162 is along the axial protrusion and hold auxiliary gear 103, makes tooth portion 161 cross auxiliary gear 103 and presses close to the frame, neither influences the installation of the whole transmission structure of motor 112 effect among the moped, effectively shortens the distance of tooth portion 161 and frame again, prevents that the distance between chain and the frame is too far away.
Specifically, the mounting portion 162 includes an annular side wall and a bottom plate sealed at one end of the annular side wall, the accommodating cavity is defined by the annular side wall and the bottom plate, a sleeving hole matched with the middle shaft 108 is formed in the middle of the bottom plate, and the bottom plate is fixedly connected with the auxiliary gear 103 through a fixing member, or the bottom plate and the auxiliary gear 103 are of an integrated structure.
The embodiment of the utility model provides an among the centrally-mounted drive mechanism, the speed reduction subassembly is tertiary parallel gear speed reduction subassembly, include:
a first gear and a second gear which are provided with the same shaft are arranged on the frame in a way that the first gear and the second gear can rotate around the axes of the first gear and the second gear, and the first gear and the second gear rotate at the same angular speed;
the dual gear 102, the dual gear 102 can be set up on the frame around its axis of rotation;
wherein, the axis of the pivot 101 of the motor 112, the axis of the first gear, the axis of the dual gear 102 and the axis of the middle shaft 108 are parallel to each other; an output gear arranged on the pivot 101 is meshed with the first gear to form a first-stage reduction gear pair; the second gear is meshed with a gear at one end of the duplicate gear 102 to form a two-stage reduction gear pair; the gear at the other end of the duplicate gear 102 is meshed with the auxiliary gear 103 to form a three-stage reduction gear pair.
The gear at the other end of the dual gear 102 is located in the accommodating cavity, that is, the three-stage reduction gear pair is located in the accommodating cavity. The embodiment of the utility model provides a speed reduction subassembly compares two-stage planetary gear speed reduction for tertiary parallel gear speed reduction, and its reduction ratio can be done greatly, increases output torque, and duplicate gear 102's diameter is less relatively in the last one-level reduction gear pair, and the space that occupies is less, is convenient for arrange at the holding intracavity.
In order to facilitate assembly, the central driving mechanism provided in the above embodiment further includes a housing, and correspondingly, the motor 112, the first gear, the second gear, and the duplicate gear 102 are respectively assembled to the frame through the housing. In this embodiment, the housing can protect the transmission mechanism between the motor 112 and the middle shaft 108, so as to ensure smooth transmission of the transmission mechanism.
The above-mentioned embodiment provides a center-set mechanism, which further includes a torque sensing component for detecting the torque of the center shaft 108 and sending a torque sensing signal to the controller, and the controller controls the motor 112 according to the torque sensing signal. The controller is installed on the motor or the frame, and the embodiment is not limited.
In this embodiment, a torque sensing assembly is added to adjust the output power of the motor 112 according to the pedaling force, so as to adjust the driving assistance.
Specifically, the torque sensor assembly includes:
the elastic body 104 is sleeved on the middle shaft 108, and is connected with the middle shaft 108 through a key; the elastic body 104 is fixedly connected with the frame;
and the sensing piece is attached to the elastic body 104 and sends a torque sensing signal to the controller.
When the torsion-proof middle shaft assembly is used, the middle shaft 108 rotates, the elastic body 104 generates deformation capable of feeding back torsion on the middle shaft 108, the sensing sheet senses the deformation and transmits a sensing signal to the controller, and the controller adjusts the output of the motor 112 according to the torsion sensing signal.
Of course, the torque sensor assembly may also be configured as other types of sensor assemblies, and this embodiment is not limited, and only needs to be able to detect the torque on the middle shaft 108.
In the above-mentioned middle driving mechanism, the tooth portion 161 and the mounting portion 162 of the chain wheel 106 are of an integral structure. Tooth portion 161 is closer to the distance of frame, and tooth portion 161 can set up to include a plurality of fluted discs to each fluted disc sets up along installation portion 162 axial interval, obviously realizes the multiple fluted discs under the prerequisite of guaranteeing small in size in this embodiment, improves the quantity of variable speed gear.
Specifically, the fluted disc of tooth portion 161 sets up to 2 in the chain wheel 106, compares and to set up single chain wheel in the middle drive mechanism among the prior art for the front and back variable speed of boosting bicycle is adjusted and is kept off the position and doubles, and more convenience of customers uses. Of course, the tooth 161 may also include 1 tooth disc, 3 tooth discs, etc., and the embodiment is not limited thereto.
The central driving mechanism provided by the above embodiment further includes a bushing, the bushing 107 receives the middle axle 108, and the bushing 107 passes through the axle hole of the frame and is fixed by a metal fastener. The end of the specific sleeve is provided with a thread, and the metal fastener is a lock nut 109 which is matched with the thread.
During assembly, the shaft sleeve 107 penetrates through a shaft hole of the frame, the locking nut 109 is screwed on the shaft sleeve 107 to fix the shaft sleeve 107 at the shaft hole of the frame, and then the left crank 111, the chain wheel 106 and the right crank 105 are mounted, so that the mounting structure is simple and the steps are simple.
Preferably, the central driving mechanism further comprises a gasket 110 which is filled between the lock nut 109 and the shaft hole wall of the vehicle frame.
Furthermore, the elastic body 104 in the torque sensing assembly and a one-way clutch connecting shaft support of the power-assisted bicycle are of an integrated structure, and the one-way clutch connecting shaft support is fixed with the frame.
As can be understood by those skilled in the art, due to the small aperture of the axle hole in the frame, the torque sensing assembly needs to be installed in a limited radial space, and due to the size limitation of the axle sleeve 107, the embodiment integrates the one-way clutch connecting axle support and the elastic body 104 into a whole, so that the torque sensing function in the limited radial space is realized, and the circumferential outer ring of the elastic body 104 realizes the function of the clutch connecting axle support, and the two phases are combined, so that the space is saved.
The embodiment provides a middle driving mechanism, so that the distance between the central plane of the chain and the central plane of the frame (the central plane is vertical and parallel to the front-back direction of the frame) is 49mm, the distance between the axis of the duplicate gear 102 and the axis of the middle shaft 108 meets 40.74mm, the vertical structure is compact, the sum of the diameters of the two gears in the third-stage reduction gear pair is 93mm-95mm, the radial size of the accommodating cavity is effectively reduced, and the diameter size of the chain wheel 106 meets the standard specification. The strong commonality of this middle driving mechanism is strong, can be applicable to and locate any bicycle frame outside highway bicycle.
The embodiment of the utility model provides a still provide a moped, including putting actuating mechanism in, wherein, put actuating mechanism and put actuating mechanism for what above-mentioned embodiment provided in, avoid chain and frame distance too far. Of course, the power-assisted bicycle provided by the embodiment also has other effects related to the middle-mounted driving mechanism provided by the above embodiment, and details are not repeated herein.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A centrally-mounted drive mechanism for a power-assisted bicycle, comprising:
the middle shaft is inserted into a shaft hole of a middle frame of the moped; an auxiliary gear is sleeved and fixed on the middle shaft;
the chain wheel comprises a mounting part positioned at the central position and a tooth part fixed on the periphery of the mounting part; the mounting part axially protrudes and forms an accommodating cavity, and the tooth part is positioned at one end of the mounting part close to the frame in the axial direction; the auxiliary gear is positioned in the accommodating cavity; the mounting part is sleeved on the middle shaft and is fixedly connected with the auxiliary gear;
the motor is assembled on a frame of the power-assisted bicycle and drives the auxiliary gear to rotate through the speed reduction assembly.
2. The centrally mounted drive mechanism of claim 1, wherein said reduction assembly is a three-stage parallel gear reduction assembly comprising:
the first gear and the second gear are arranged on the frame in a manner that the first gear and the second gear can rotate around the axes of the first gear and the second gear;
the dual gear can be arranged on the frame in a manner of rotating around the axis of the dual gear;
the axis of the pivot of the motor, the axis of the first gear, the axis of the duplicate gear and the axis of the middle shaft are parallel to each other; an output gear arranged on the pivot is meshed with the first gear to form a primary reduction gear pair; the second gear is meshed with a gear at one end of the duplicate gear to form a two-stage reduction gear pair; and a gear at the other end of the duplicate gear is meshed with the auxiliary gear to form a three-stage reduction gear pair.
3. The centrally located drive mechanism of claim 2, wherein the gear at the other end of the dual gear is located within the receiving cavity.
4. The centrally mounted drive mechanism of claim 2, further comprising a housing through which the motor, the first gear, the second gear, and the duplicate gear are respectively mounted to the frame.
5. The center drive mechanism as recited in claim 1, further comprising a torque sensor assembly for detecting a torque of said bottom bracket axle and sending a torque sensing signal to a controller, said controller controlling said motor based on said torque sensing signal.
6. The mid-drive mechanism as set forth in claim 5, wherein the torque sensing assembly comprises:
the elastic body is sleeved on the middle shaft and is connected with the middle shaft through a key; the elastic body is fixedly connected with the frame;
the induction sheet is attached to the elastic body and sends the torsion induction signal to the controller.
7. The centrally-mounted drive mechanism as claimed in claim 6, wherein the resilient body is integrally formed with a one-way clutch coupling support of the power-assisted bicycle, the one-way clutch coupling support being fixed to the frame.
8. The mid-drive mechanism as set forth in claim 1, wherein the toothed portion includes a plurality of toothed discs, each of the toothed discs being spaced apart along an axial direction of the mounting portion.
9. The mid-drive mechanism as set forth in claim 1, further comprising a bushing that receives the central shaft; the shaft sleeve penetrates through the shaft hole and is fixed through a metal fastener.
10. A power-assisted bicycle comprising a centrally-mounted drive mechanism, wherein the centrally-mounted drive mechanism is as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922420305.9U CN212500855U (en) | 2019-12-27 | 2019-12-27 | Centrally-mounted driving mechanism and power-assisted bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922420305.9U CN212500855U (en) | 2019-12-27 | 2019-12-27 | Centrally-mounted driving mechanism and power-assisted bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212500855U true CN212500855U (en) | 2021-02-09 |
Family
ID=74386738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922420305.9U Active CN212500855U (en) | 2019-12-27 | 2019-12-27 | Centrally-mounted driving mechanism and power-assisted bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212500855U (en) |
-
2019
- 2019-12-27 CN CN201922420305.9U patent/CN212500855U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0743238B1 (en) | Pedaling force detecting device of a motor assisted bicycle | |
| TW200538353A (en) | Bicycle drive unit | |
| TWI738117B (en) | Harmonic drive system for pedal electric cycle | |
| EP2818393B1 (en) | Electric hub device and electric bicycle | |
| US5967537A (en) | Chainless transmission mechanism for a bicycle | |
| JP3974386B2 (en) | Reduction gear mechanism for electric drive | |
| JPH09301260A (en) | Torque transmitting device for motor-assisted vehicle | |
| CN111319711A (en) | Centrally-mounted driving mechanism and power-assisted bicycle | |
| US11643159B2 (en) | Electric power generator for human-powered vehicle | |
| CN212500855U (en) | Centrally-mounted driving mechanism and power-assisted bicycle | |
| CN107685828B (en) | Stepless speed change transmission device for electric bicycle | |
| US10604213B2 (en) | Bicycle transmission for use between a chain wheel carrier and a wheel hub of a bicycle, as well as rear axle and rear wheel provided with such a transmission | |
| CN218124495U (en) | Hub motor and power-assisted electric bicycle | |
| US11813891B2 (en) | Hub for human-powered vehicle | |
| CN115459520A (en) | Hub motor and power-assisted electric bicycle | |
| CN115459514A (en) | In-wheel motor and electric bicycle | |
| US20200361566A1 (en) | Transmission Shaft of Electric Vehicle | |
| JP4494592B2 (en) | Motor drive unit for electric bicycle | |
| CN106995034B (en) | In-wheel motor and electric bicycle equipped with same | |
| JPH1081292A (en) | Drive unit of bicycle with auxiliary power | |
| JP2000185656A (en) | Worm wheel of electric power steering device | |
| WO2024060578A1 (en) | Wheel hub motor and power-assisted electric bicycle | |
| CN216102636U (en) | Swing type tricycle easy to assemble | |
| CN211032916U (en) | Electric bicycle driving structure | |
| CN216994732U (en) | Mid-motor assembly and electric power-assisted bicycle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |