CN212220486U - Electric power-assisted middle shaft transmission - Google Patents
Electric power-assisted middle shaft transmission Download PDFInfo
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- CN212220486U CN212220486U CN202021351258.3U CN202021351258U CN212220486U CN 212220486 U CN212220486 U CN 212220486U CN 202021351258 U CN202021351258 U CN 202021351258U CN 212220486 U CN212220486 U CN 212220486U
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Abstract
The utility model relates to an electricity helping hand axis derailleur, include: trample axle, automatic centrifugal gearshift, speed change mechanism and helping hand motor, automatic centrifugal gearshift includes: ratchet, pawl spare frame and install at least one pawl spare, at least two counter weights and at least one balancing piece on the pawl spare frame, the pawl spare frame cover is located and is stepped on the axle and can do relative rotation for stepping on the axle, speed change mechanism includes: first drive wheel, second drive wheel, third drive wheel and fourth drive wheel, first drive wheel cover is located and is stepped on epaxially and trample between the axle through first freewheel clutch and be connected, second drive wheel cover is located and is stepped on epaxially and with pawl frame fixed connection or integrated into one piece, be equipped with the output wheel on the second drive wheel, third drive wheel and fourth drive wheel cover are located on the motor shaft and can rotate for the motor shaft to can improve the efficiency of riding greatly with the help of electric power when the manual work is trampled more laboriously.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a bicycle derailleur field especially relates to an electric power-assisted axis derailleur.
[ background of the invention ]
Referring to chinese patent No. 201721524099.0, it discloses a two-speed transmission device comprising: speed change mechanism and wheel, speed change mechanism includes: the transmission comprises a main transmission shaft, a transmission frame arranged on the main transmission shaft and a driven shaft arranged in the transmission frame, wherein the main transmission shaft is connected with the transmission frame through a bearing, two ends of the main transmission shaft are respectively connected with wheel hubs, an input wheel, an output wheel and a driving wheel are arranged on the main transmission shaft, the input wheel is sleeved on the main transmission shaft and can rotate and move axially relative to the main transmission shaft, a first meshing part and a second meshing part are arranged on the input wheel, a third meshing part matched with the first meshing part is arranged on the driving wheel, a fourth meshing part matched with the second meshing part is arranged on the main transmission shaft, the driving wheel is sleeved on the main transmission shaft and can rotate relative to the main transmission shaft, the output wheel is fixedly connected with the main transmission shaft, a bearing is arranged between the driven shaft and the transmission frame, a first driven wheel matched with the driving wheel and a second driven wheel matched with the output wheel are arranged on the driven shaft And the first driven wheel and the second driven wheel are respectively and fixedly connected with the driven shaft. The high-speed gear and the low-speed gear are switched by axially moving the input wheel, and the transmission device has the defects that: 1. the device adopts that manual shifting, and the operation is comparatively inconvenient, and the efficiency of shifting is lower, 2, the device structure is comparatively complicated, and it is comparatively difficult to make, 3, the device does not have the electric power-assisted, can only trample by the manual work.
Therefore, there is a need for an electrically assisted bottom bracket transmission that solves the above mentioned problems.
[ Utility model ] content
In order to solve the above problems, an object of the present invention is to provide an electric power assisted middle shaft transmission with compact structure and capable of realizing electric power assistance.
In order to achieve the above purpose, the utility model adopts the following technical scheme: an electrically assisted bottom bracket shaft transmission comprising: trample axle, automatic centrifugal gearshift, speed change mechanism and helping hand motor, trample the axle and install on the frame and can do relative rotation for the frame, helping hand motor installs on the frame and helping hand motor's motor shaft is parallel arrangement with trampling the axle, automatic centrifugal gearshift includes: ratchet, pawl frame and install at least one pawl spare, two at least counter weights and at least one balancing piece on the pawl frame, the counter weight forms an assembly or sets up alone with the pawl spare, be equipped with the pawl portion with ratchet matched with on the pawl spare, the pawl spare frame cover is located and is stepped on the axle and can do relative rotation for stepping on the axle, initial position is controlled through the elastic component to counter weight spare and pawl spare, two adjacent counter weights are connected to the balancing piece, speed change mechanism includes: a first driving wheel, a second driving wheel, a third driving wheel and a fourth driving wheel, wherein the first driving wheel is sleeved on the treading shaft and is connected with the treading shaft through a first overrunning clutch, the second driving wheel is sleeved on the treading shaft and is fixedly connected with the pawl rack or is integrally formed, an output wheel fixedly connected with the second driving wheel is arranged on the second driving wheel, the first driving wheel and the third driving wheel form a first driving pair, the second driving wheel and the fourth driving wheel form a second driving pair, the third driving wheel and the fourth driving wheel are sleeved on the motor shaft and can rotate relative to the motor shaft, the ratchet wheel is arranged on the first driving wheel or the treading shaft, when the ratchet wheel is arranged on the first driving wheel, the third driving wheel is connected with the motor shaft through a second overrunning clutch, and the fourth driving wheel is connected with the third driving wheel through a third overrunning clutch; when the ratchet wheel is arranged on the treading shaft, the third driving wheel and the fourth driving wheel form an assembly, and the assembly is connected with the motor shaft through a second overrunning clutch.
Preferably, the utility model provides an electric power assisted middle shaft speed changer further sets up to: the electric power-assisted middle shaft transmission also comprises a mounting frame fixedly arranged on the frame, and the power-assisted motor and the treading shaft are both arranged on the mounting frame.
Preferably, the utility model provides an electric power assisted middle shaft speed changer further sets up to: the speed changer further comprises a torque sensor and a controller, and the controller is connected with the torque sensor and the power assisting motor respectively.
Preferably, the utility model provides an electric power assisted middle shaft speed changer further sets up to: a bearing is arranged between the treading shaft and the frame, and treading pieces are arranged at two ends of the treading shaft.
Preferably, the utility model provides an electric power assisted middle shaft speed changer further sets up to: the first driving wheel, the second driving wheel, the third driving wheel and the fourth driving wheel are all gears.
Preferably, the utility model provides an electric power assisted middle shaft speed changer further sets up to: the first transmission wheel is connected with the third transmission wheel through a first transmission medium, and the second transmission wheel is connected with the fourth transmission wheel through a second transmission medium.
Preferably, the utility model provides an electric power assisted middle shaft speed changer further sets up to: the first transmission wheel, the second transmission wheel, the third transmission wheel and the fourth transmission wheel are chain wheels or belt wheels, and the first transmission medium and the second transmission medium are chains or transmission belts.
Preferably, the utility model provides an electric power assisted middle shaft speed changer further sets up to: the output wheel is a chain wheel or a belt wheel, a fifth driving wheel is arranged on a hub of the rear wheel, the output wheel drives the fifth driving wheel through a chain or a driving belt, and the fifth driving wheel is fixedly connected with the hub.
Preferably, the utility model provides an electric power assisted middle shaft speed changer further sets up to: the pawl is arranged on the pawl frame through a pin, the elastic piece is a torsion spring, and the balance piece is a balance pull rod.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model provides an electric power-assisted axis derailleur compact structure, simple to operate, the utility model provides an electric power-assisted axis derailleur can realize automatic speed changing, and the manual work is trampled and can be with the help of electric power-assisted when more exerting oneself, has improved the efficiency of riding greatly.
[ description of the drawings ]
Fig. 1 is a schematic structural view of an electric power assisted middle shaft transmission in embodiment 1 of the present invention.
Fig. 2 is a schematic sectional structure view of an electric power assisted middle shaft transmission in embodiment 1 of the present invention.
Fig. 3 is an exploded schematic view of the electric power assisted middle shaft transmission in embodiment 1 of the present invention.
Fig. 4 is a schematic sectional structure view of an electric power assisted middle shaft transmission in embodiment 2 of the present invention.
In fig. 1 to 4: 1. mounting frame, 2, treading shaft, 3, automatic centrifugal gear shifting mechanism, 30, ratchet wheel, 31, pawl member frame, 32, pawl member, 320, pawl part, 33, counterweight member, 34, balance member, 35, pin, 36, elastic member, 4, speed change mechanism, 40, first transmission wheel, 41, second transmission wheel, 42, third transmission wheel, 43, fourth transmission wheel, 44, first overrunning clutch, 45, output wheel, 46, second overrunning clutch, 47, third overrunning clutch, 5, booster motor, 50 and motor shaft.
[ detailed description ] embodiments
The present invention relates to an electric power assisted middle shaft transmission, and more particularly, to an electric power assisted middle shaft transmission.
Example 1
Referring to fig. 1 to 3, an electric power assisted bottom bracket shaft transmission includes: the bicycle pedal comprises an installation frame 1, a treading shaft 2, an automatic centrifugal gear shifting mechanism 3, a speed change mechanism 4, a power-assisted motor 5, a torque sensor (not shown) and a controller (not shown), wherein the installation frame 1 is fixedly arranged on a bicycle frame, the power-assisted motor 5 and the treading shaft 2 are both arranged on the installation frame 1, a motor shaft 50 of the power-assisted motor 5 is arranged in parallel with the treading shaft 2, the treading shaft 2 can rotate relative to the installation frame 1, a bearing (not shown) is arranged between the treading shaft 2 and the installation frame 1, and treading pieces (not shown) are arranged at two ends of the treading shaft 2. And the controller is respectively connected with the torque sensor and the power-assisted motor 5. The controller may include a Microprocessor (MCU) which may include a Central Processing Unit (CPU), a read-only memory (ROM), a Random Access Memory (RAM), a timing module, a digital-to-analog conversion (a/D converter), and a plurality of input/output ports. Of course, the controller may also take other forms of integrated circuits, such as: an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or the like, and in the present embodiment, the controller is a PLC controller. Moment sensor installs and tramples between piece and the output wheel of bicycle or direct mount tramples on axle 2, tramples axle 2 and can produce very slight torsion deformation when the atress, moment sensor is used for measuring the size that tramples the moment that axle 2 surperficial slight deformation signal can reachd the current moment of trampling, when moment sensor measures the moment of trampling at present great, gives the controller with signal transmission, and the controller gives helping hand motor 5 with signal transmission again, and the notice helping hand motor 5 starts and carries out electric power assistance.
The automatic centrifugal shift mechanism 3 includes: the ratchet 30, the pawl frame 31, and at least one pawl 32, at least two weights 33 and at least one balance 34 mounted on the pawl frame 31, wherein the pawl 32 is mounted on the pawl frame 31 by a pin 35, the weights 33 and the pawl 32 form an assembly or are separately disposed, and in the present embodiment, the weights 33 and the pawl 32 are integrally formed. The pawl 32 is provided with a pawl portion 320 engaged with the ratchet 30, the pawl frame 31 is sleeved on the stepping shaft 2 and can rotate relative to the stepping shaft 2, the balance weight 33 and the pawl 32 both control initial positions through an elastic member 36, in this embodiment, the elastic member 36 is a torsion spring, the balance member 34 connects two adjacent balance weight 33, and in this embodiment, the balance member 34 is a balance pull rod.
The speed change mechanism 4 includes: the pedal device comprises a first driving wheel 40, a second driving wheel 41, a third driving wheel 42 and a fourth driving wheel 43, wherein the first driving wheel 40 is sleeved on the pedal shaft 2 and connected with the pedal shaft 2 through a first overrunning clutch 44, the ratchet wheel 30 is arranged on the pedal shaft 2 and integrally formed or fixedly connected with the pedal shaft 2, the second driving wheel 41 is sleeved on the pedal shaft 2 and fixedly connected with or integrally formed with the pawl frame 31, the second driving wheel 41 is provided with an output wheel 45 and fixedly connected with the output wheel 45, in the embodiment, the output wheel 45 is a chain wheel or a belt wheel, a fifth driving wheel is arranged on a hub of a rear wheel, the output wheel 45 drives the fifth driving wheel through a chain or a driving belt, and the fifth driving wheel is fixedly connected with the hub. The third driving wheel 42 and the fourth driving wheel 43 are sleeved on the motor shaft 50 and can rotate relative to the motor shaft 50, in the present embodiment, the third transmission wheel 42 and the fourth transmission wheel 43 form an assembly, the assembly is sleeved on the motor shaft 50 and connected with the motor shaft 50 through the second overrunning clutch 46, the first transmission wheel 40 and the third transmission wheel 42 form a first transmission pair, the second transmission wheel 41 and the fourth transmission wheel 43 form a second transmission pair, in the present embodiment, the first transmission wheel 40, the second transmission wheel 41, the third transmission wheel 42 and the fourth transmission wheel 43 are all gears, of course, in other embodiments, the first transmission wheel 40 and the third transmission wheel 42 can be connected by the first transmission medium, the second transmission wheel 41 and the fourth transmission wheel 43 can also be connected through a second transmission medium. First drive wheel 40, second drive wheel 41, third drive wheel 42 and fourth drive wheel 43 are sprocket or band pulley, first drive medium and second drive medium are chain or drive belt, can realize equally the utility model discloses.
The electric power-assisted middle shaft transmission in the embodiment has the working principle that: in a low gear, a person steps on the stepping piece to drive the stepping shaft 2 to rotate, the stepping shaft 2 drives the first transmission wheel 40 to rotate through the first overrunning clutch 44, the first transmission wheel 40 is meshed with the third transmission wheel 42, so the third transmission wheel 42 rotates, the third transmission wheel 42 and the fourth transmission wheel 43 form an assembly, so the fourth transmission wheel 43 rotates, the fourth transmission wheel 43 is meshed with the second transmission wheel 41, so the second transmission wheel 41 rotates, so the output wheel 45 on the second transmission wheel 41 is driven to output power, and the low gear is output in a speed reduction manner; when the bicycle is ridden in a low gear, when the moment sensor monitors that the treading moment is large, a signal is transmitted to the controller, the controller informs the power-assisted motor 5 to start, the power-assisted motor 5 drives the motor shaft 50 to rotate, the motor shaft 50 drives the third driving wheel 42 and the fourth driving wheel 43 to rotate through the second overrunning clutch 46, the fourth driving wheel 43 drives the second driving wheel 41 to rotate, and the output wheel 45 is fixedly connected with the second driving wheel 41, so that the output wheel 45 outputs power.
In a high gear, as the rotation speed of the stepping shaft 2 is faster and faster, the rotation speed of the second transmission wheel 41 is faster and faster, because the pawl frame 31 and the second transmission wheel 41 are integrally formed, the pawl 32 is further arranged on the pawl frame 31, the rotation speed of the pawl 32 is faster and faster, when the rotation speed of the pawl 32 reaches a certain value, the counterweight 33 moves in a direction away from the center of a circle under the action of centrifugal force, so that the pawl part 320 of the pawl 32 moves towards the center of the circle to be meshed with the ratchet wheel 30, because the ratchet wheel 30 is fixedly connected or integrally formed with the stepping shaft 2, the stepping shaft 2 directly drives the pawl 32 and the pawl frame 31 to rotate, the pawl frame 31 drives the second transmission wheel 41 to rotate, because the output wheel 45 is fixedly connected with the second transmission wheel 41, the output wheel 45 outputs power, and at the moment, the first transmission wheel 40, the third transmission wheel 42 and the fourth transmission wheel 43 are in a follow-up state, the high-speed gear is power output 1: 1; when riding in a high gear, when the torque sensor monitors that the stepping torque is large, a signal is transmitted to the controller, the controller informs the power-assisted motor 5 to start, the power-assisted motor 5 drives the motor shaft 50 to rotate, the motor shaft 50 drives the third driving wheel 42 and the fourth driving wheel 43 to rotate through the second overrunning clutch 46, the fourth driving wheel 43 drives the second driving wheel 41 to rotate, the output wheel 45 is fixedly connected with the second driving wheel 41, the output wheel 45 outputs power, and the first driving wheel 40 follows up at the moment.
Example 2
Referring to fig. 4, the rest of the structure in this embodiment is the same as that in embodiment 1, except that: 1. the ratchet wheels 30 are arranged at different positions, the assembling structures of the third transmission wheel 42, the fourth transmission wheel 43 and the motor shaft 50 are different, in the embodiment 1, the ratchet wheel 30 is disposed on the stepping shaft 2 and is integrally formed or fixedly connected with the stepping shaft 2, the third driving wheel 42 and the fourth driving wheel 43 form an assembly, the assembly is sleeved on the motor shaft 50 and connected with the motor shaft 50 through a second overrunning clutch 46, in the present embodiment, the ratchet wheel 30 is disposed on the first driving wheel 40 and is integrally formed with or fixedly connected to the first driving wheel 40, the third transmission wheel 42 and the fourth transmission wheel 43 are separately arranged, the third transmission wheel 42 is connected with the motor shaft 50 through a second overrunning clutch 46, the fourth transmission wheel 43 is connected with the third transmission wheel 42 through a third overrunning clutch 47, so that the problem of speed difference between the third transmission wheel 42 and the fourth transmission wheel 43 can be solved.
The low-gear operating principle of the electric power-assisted middle shaft transmission in the embodiment is the same as that in embodiment 1, while the high-gear operating principle is different from that in embodiment 1, and the high-gear operating principle of the electric power-assisted middle shaft transmission in the embodiment is as follows: in a high gear, as the stepping shaft 2 rotates faster and faster, the rotation speed of the second transmission wheel 41 also increases and faster, because the pawl frame 31 and the second transmission wheel 41 are fixedly connected or integrally formed, the rotation speed of the pawl frame 31 and the pawl 32 also increases and faster, the counterweight 33 of the pawl 32 moves away from the center of a circle under the action of centrifugal force, so that the pawl part 320 of the pawl 32 moves towards the center of a circle and is meshed with the ratchet wheel 30, because the ratchet wheel 30 is fixedly connected or integrally formed with the first transmission wheel 40, the stepping shaft 2 drives the first transmission wheel 40 to rotate through the first overrunning clutch 44, the first transmission wheel 40 drives the pawl frame 31 to rotate, the pawl frame 31 drives the second transmission wheel 41 to rotate, because the output wheel 45 is fixedly connected with the second transmission wheel 41, the output wheel 45 outputs power, and at the moment, the third transmission wheel 42 and the fourth transmission wheel 43 follow, the high-speed gear is power output 1: 1; when the torque sensor monitors that the stepping torque is large during high-speed riding, a signal is transmitted to the controller, the controller informs the power-assisted motor 5 to start, the power-assisted motor 5 drives the motor shaft 50 to rotate, the motor shaft 50 drives the third transmission wheel 42 to rotate through the second overrunning clutch 46, the third transmission wheel 42 is meshed with the first transmission wheel 40, the third transmission wheel 42 drives the first transmission wheel 40 to rotate, the first transmission wheel 40 drives the pawl member frame 31 to rotate, the pawl member frame 31 drives the second transmission wheel 41 to rotate, the output wheel 45 is fixedly connected with the second transmission wheel 41 to output power, and at the moment, the fourth transmission wheel 43 overruns and follows.
To sum up, the utility model provides an electric power assisted axis derailleur compact structure, simple to operate, the utility model provides an automatic speed changing can be realized to electric power assisted axis derailleur, can improve riding efficiency greatly with the help of electric power assistance when artifical trample more labouring.
The above-mentioned embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be applied, and are not intended to limit the present invention; it should be noted that, for those skilled in the art, without departing from the inventive concept, several variations and modifications can be made, which are within the scope of the present invention.
Claims (9)
1. An electrically assisted bottom bracket shaft transmission, comprising: trample axle, automatic centrifugal gearshift, speed change mechanism and helping hand motor, trample the axle and install on the frame and can do relative rotation for the frame, helping hand motor installs on the frame and helping hand motor's motor shaft is parallel arrangement with trampling the axle, automatic centrifugal gearshift includes: ratchet, pawl frame and install at least one pawl spare, two at least counter weights and at least one balancing piece on the pawl frame, the counter weight forms an assembly or sets up alone with the pawl spare, be equipped with the pawl portion with ratchet matched with on the pawl spare, the pawl spare frame cover is located and is stepped on the axle and can do relative rotation for stepping on the axle, initial position is controlled through the elastic component to counter weight spare and pawl spare, two adjacent counter weights are connected to the balancing piece, speed change mechanism includes: a first driving wheel, a second driving wheel, a third driving wheel and a fourth driving wheel, wherein the first driving wheel is sleeved on the treading shaft and is connected with the treading shaft through a first overrunning clutch, the second driving wheel is sleeved on the treading shaft and is fixedly connected with the pawl rack or is integrally formed, an output wheel fixedly connected with the second driving wheel is arranged on the second driving wheel, the first driving wheel and the third driving wheel form a first driving pair, the second driving wheel and the fourth driving wheel form a second driving pair, the third driving wheel and the fourth driving wheel are sleeved on the motor shaft and can rotate relative to the motor shaft, the ratchet wheel is arranged on the first driving wheel or the treading shaft, when the ratchet wheel is arranged on the first driving wheel, the third driving wheel is connected with the motor shaft through a second overrunning clutch, and the fourth driving wheel is connected with the third driving wheel through a third overrunning clutch; when the ratchet wheel is arranged on the treading shaft, the third driving wheel and the fourth driving wheel form an assembly, and the assembly is connected with the motor shaft through a second overrunning clutch.
2. An electrically assisted bottom bracket shaft transmission as defined in claim 1, wherein: the electric power-assisted middle shaft transmission also comprises a mounting frame fixedly arranged on the frame, and the power-assisted motor and the treading shaft are both arranged on the mounting frame.
3. An electrically assisted bottom bracket shaft transmission as defined in claim 1, wherein: the speed changer further comprises a torque sensor and a controller, and the controller is connected with the torque sensor and the power assisting motor respectively.
4. An electrically assisted bottom bracket shaft transmission as defined in claim 1, wherein: a bearing is arranged between the treading shaft and the frame, and treading pieces are arranged at two ends of the treading shaft.
5. An electrically assisted bottom bracket shaft transmission as defined in claim 1, wherein: the first driving wheel, the second driving wheel, the third driving wheel and the fourth driving wheel are all gears.
6. An electrically assisted bottom bracket shaft transmission as defined in claim 1, wherein: the first transmission wheel is connected with the third transmission wheel through a first transmission medium, and the second transmission wheel is connected with the fourth transmission wheel through a second transmission medium.
7. An electrically assisted bottom bracket shaft transmission as defined in claim 6, wherein: the first transmission wheel, the second transmission wheel, the third transmission wheel and the fourth transmission wheel are chain wheels or belt wheels, and the first transmission medium and the second transmission medium are chains or transmission belts.
8. An electrically assisted bottom bracket shaft transmission as defined in claim 1, wherein: the output wheel is a chain wheel or a belt wheel, a fifth driving wheel is arranged on a hub of the rear wheel, the output wheel drives the fifth driving wheel through a chain or a driving belt, and the fifth driving wheel is fixedly connected with the hub.
9. An electrically assisted bottom bracket shaft transmission as defined in claim 1, wherein: the pawl is arranged on the pawl frame through a pin, the elastic piece is a torsion spring, and the balance piece is a balance pull rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021351258.3U CN212220486U (en) | 2020-07-10 | 2020-07-10 | Electric power-assisted middle shaft transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021351258.3U CN212220486U (en) | 2020-07-10 | 2020-07-10 | Electric power-assisted middle shaft transmission |
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| Publication Number | Publication Date |
|---|---|
| CN212220486U true CN212220486U (en) | 2020-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021351258.3U Active CN212220486U (en) | 2020-07-10 | 2020-07-10 | Electric power-assisted middle shaft transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212220486U (en) |
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2020
- 2020-07-10 CN CN202021351258.3U patent/CN212220486U/en active Active
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