CN116767412A - Multi-gear middle motor and gear shifting method thereof - Google Patents

Multi-gear middle motor and gear shifting method thereof Download PDF

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Publication number
CN116767412A
CN116767412A CN202311007241.4A CN202311007241A CN116767412A CN 116767412 A CN116767412 A CN 116767412A CN 202311007241 A CN202311007241 A CN 202311007241A CN 116767412 A CN116767412 A CN 116767412A
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China
Prior art keywords
gear
shaft
ratchet
sliding double
power
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Chinese (zh)
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蔡明�
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Individual
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Individual
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Priority to CN202311007241.4A priority Critical patent/CN116767412A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B62M6/55—Rider propelled cycles with auxiliary electric motor power-driven at crank shafts parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
    • B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
    • B62M11/06—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with spur gear wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M23/00—Transmissions characterised by use of other elements; Other transmissions

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

The invention relates to the field of a middle motor, in particular to a multi-gear middle motor and a gear shifting method thereof, wherein the middle motor comprises a middle shaft, a sleeve shaft, an auxiliary shaft, a pedal power input unit, a power-assisted input unit, a transmission reduction gear, a second one-way clutch and a first one-way clutch, wherein the pedal power input unit is fixedly connected with the left end and the right end of the middle shaft and transmits driving power to the middle shaft, the power-assisted input unit transmits the driving power to a transition gear through the transmission reduction gear, the gear shifting method utilizes the combination of the one-way clutch and a ratchet wheel of the power-assisted input unit to realize multi-gear positions, and the gear shifting method has the advantages of compact and simple structure and stable operation, and overcomes the defects that the traditional middle motor is less in transmission speed and unfavorable for high-speed running and stable output of various torque outputs.

Description

Multi-gear middle motor and gear shifting method thereof
Technical Field
The invention relates to the field of centrally-mounted motors, in particular to a multi-gear centrally-mounted motor and a gear shifting method thereof.
Background
Bicycles, also known as bicycles or scooters. The transmission speed ratio of the bicycle is fixed and invariable and the speed ratio is adjustable, and usually the power input of the bicycle is driven by a pedal power input unit, namely, most bicycles comprise a central shaft, two ends of the central shaft are respectively provided with the pedal power input unit for driving, and a small part of the bicycles also adopt a mode of jointly driving the power input units, as disclosed in application publication number 113859419A, the three-speed central motor capable of automatically shifting gears is disclosed, but the motor has three gears, so that the relative transmission speed is relatively low, and the high-speed running and the stable output of various torque outputs are not facilitated.
Disclosure of Invention
The invention provides a multi-gear middle motor, which is compact and simple in structure and stable in operation, and overcomes the defects that the traditional middle motor is low in transmission speed, is unfavorable for high-speed operation and stably outputs various torque outputs.
In order to achieve the aim of the invention, the multi-gear middle motor comprises a middle shaft, an auxiliary shaft, a pedal power input unit, a power-assisted input unit and a transmission reduction gear, wherein the pedal power input unit is fixedly connected to the left end and the right end of the middle shaft and transmits driving power to the middle shaft; the power-assisted input unit transmits driving power to the transition gear through the transmission reduction gear and further comprises a sleeve shaft, a first one-way clutch and a second one-way clutch, a second-gear center shaft gear is sleeved on the left section of the center shaft, and the second-gear center shaft gear is connected with the center shaft through the first one-way clutch; the sleeve shaft is sleeved on the right section of the middle shaft on the right side of the second-gear middle shaft gear; the sleeve shaft is provided with at least a first sliding double-ratchet wheel, a first-gear central shaft gear and an output chain wheel from left to right, wherein the output chain wheel is fixedly connected to the sleeve shaft, the first-gear central shaft gear is connected with the sleeve shaft through a third one-way clutch, and the first sliding double-ratchet wheel is in sliding sleeve connection with the sleeve shaft;
the auxiliary shaft is at least provided with a second-gear auxiliary shaft gear, a transition gear and a first-gear auxiliary shaft gear from left to right, wherein the first-gear auxiliary shaft gear and the second-gear auxiliary shaft gear are fixedly connected to the auxiliary shaft, and the transition gear is connected with the auxiliary center shaft through the second one-way clutch;
the first sliding double-ratchet wheel is meshed with the ratchet of the second-gear middle shaft gear when sliding leftwards, and the power is transmitted to the sleeve shaft from the middle shaft.
By adopting the technical scheme, the gears run more stably, the relative output transmission speed is higher, and meanwhile, the structure adopts a mode that the motor directly drives the reduction gear and the transition gear, so that the structure is compact and simple, and the transmission efficiency is higher.
Further limited, the multi-gear shifting middle motor is a seven-gear middle motor, and the sleeve shaft is sequentially provided with a first sliding double-ratchet wheel, a five-gear middle shaft gear, a four-gear middle shaft gear, a seven-gear middle shaft gear, a first-gear middle shaft gear, a three-gear middle shaft gear, a six-gear middle shaft gear and an output sprocket from left to right; the output chain wheel is fixedly connected to the sleeve shaft, and the first-gear middle shaft gear is connected with the sleeve shaft through a third one-way clutch; the five-gear center shaft gear, the four-gear center shaft gear, the seven-gear center shaft gear, the three-gear center shaft gear and the six-gear center shaft gear are fixedly sleeved on the sleeve shaft; the first sliding double-ratchet wheel is in sliding sleeve connection with the sleeve shaft; the auxiliary shaft is sequentially provided with a second-gear auxiliary shaft gear, a transition gear five-gear auxiliary shaft gear, a fourth-gear auxiliary shaft gear, a second sliding double-ratchet wheel, a seventh-gear auxiliary shaft gear, a first-gear auxiliary shaft gear, a third sliding double-ratchet wheel and a sixth-gear auxiliary shaft gear from left to right; the first-gear auxiliary shaft gear and the second-gear auxiliary shaft gear are fixedly connected to the auxiliary shaft, and the transition gear is connected with the auxiliary center shaft through a second one-way clutch; the second sliding double-ratchet wheel and the third sliding double-ratchet wheel are both in sliding sleeve connection with the auxiliary shaft, and the five-gear auxiliary shaft gear, the four-gear auxiliary shaft gear, the seven-gear auxiliary shaft gear, the three-gear auxiliary shaft gear and the six-gear auxiliary shaft gear are in idle sleeve connection with the auxiliary shaft.
Still further, pedal power input unit is the pedal, helping hand input unit is the motor, the motor includes motor output shaft and motor output gear, fixed on the motor output shaft motor output gear, motor output gear will power transfer for transmission reducing gear extremely on the transition gear, pedal and motor are stable power supply of performance, wherein, the motor adopts the planet wheel.
Still further, inject this centrally-mounted motor and still including the casing, the casing is worn out at the both ends of axis, the right-hand member of sleeve axle wears out the casing right side, output sprocket installs in the casing right outside, auxiliary shaft, helping hand input unit and transmission reducing gear all hold inside the casing, adopt such shell structure, the transmission is safe stable, can avoid rider trousers etc. to be rolled into in the transmission gear, and the appearance is pleasing to the eye.
The second object of the present invention is to provide a gear shifting method of a mid-motor with multiple gears, which has stable gear shifting, simple operation, direct starting gear for the first gear, leftward shift of the first sliding double-ratchet, the third sliding double-ratchet and the second sliding double-ratchet for the second gear, rightward shift of the first sliding double-ratchet, the third sliding double-ratchet and the second sliding double-ratchet for the fifth gear, the sixth gear and the seventh gear, and is favorable for simplifying the design of the shift drum.
The specific gear shifting mode is as follows: when in the starting first-gear position,
when the pedal is used as power, the pedal transmits driving power to the center shaft, the second-gear center shaft gear transmits the driving power to the first-gear auxiliary shaft gear under the unidirectional forward action of the first unidirectional clutch and then to the first-gear center shaft gear, and the driving power is transmitted to the sleeve shaft and the output sprocket under the unidirectional forward action of the third unidirectional clutch; at this time, the transition gear and the transmission reduction gear do not transmit torsion under the unidirectional reverse action of the second unidirectional clutch, so that the motor is not reversed; at this time, the first sliding double-ratchet, the second sliding double-ratchet and the third sliding double-ratchet are all in the idle state;
when the motor is used as power, the motor transmits driving power to the transmission reduction gear and the transition gear, under the unidirectional forward action of the second unidirectional clutch, the driving power is transmitted to the auxiliary shaft and then to the first gear auxiliary shaft gear and the first gear middle shaft gear, and under the unidirectional forward action of the third unidirectional clutch, the driving power is transmitted to the sleeve shaft and then to the output sprocket; at this time, the second-gear center shaft gear does not transmit torsion force with the center shaft under the unidirectional reverse action of the first unidirectional clutch, and the first sliding double-ratchet wheel, the second sliding double-ratchet wheel and the third sliding double-ratchet wheel are all in an idle connection state;
when the first gear is changed to the second gear,
when the pedal is used as power, the pedal transmits driving power to the center shaft, the first sliding double-ratchet wheel slides leftwards to enable the left ratchet wheel to be meshed with the inner ratchet wheel of the second-gear center shaft gear, and the driving power is transmitted to the sleeve shaft and the output sprocket; at this time, the second sliding double-ratchet and the third sliding double-ratchet are in an idle state;
when the motor is used as power, the motor transmits driving power to a transmission reduction gear and a transition gear, under the unidirectional forward action of a second unidirectional clutch, the driving power is transmitted to an auxiliary shaft (and a second-gear auxiliary shaft gear and then to a second-gear middle shaft gear, a first sliding double-ratchet wheel slides leftwards to enable a left ratchet wheel to be meshed with an inner ratchet wheel of the second-gear middle shaft gear, and the driving power is transmitted to the sleeve shaft and an output sprocket;
when the gear is changed from the second gear to the third gear,
when the pedal is used as power, the pedal transmits driving power to the center shaft, the second-gear center shaft gear transmits the driving power to the second-gear auxiliary shaft gear and the auxiliary shaft under the unidirectional forward action of the first one-way clutch, the third sliding double-ratchet wheel slides leftwards to enable the left ratchet wheel to be meshed with the inner ratchet of the third-gear auxiliary shaft gear, the driving power is transmitted to the third-gear center shaft gear, and the driving power is transmitted to the sleeve shaft and the output sprocket; at this time, the first sliding double-ratchet and the second sliding double-ratchet are in an idle state; under the unidirectional reverse action of the third unidirectional clutch, the sleeve shaft cannot transmit driving power to the first-gear middle shaft gear;
when the motor is used as power, the motor transmits driving power to the transmission reduction gear and the transition gear, under the unidirectional forward action of the second unidirectional clutch, the driving power is transmitted to the auxiliary shaft, the third sliding double-ratchet wheel slides leftwards to enable the left ratchet wheel to be meshed with the inner ratchet wheel of the three-gear auxiliary shaft gear, the driving power is transmitted to the three-gear middle shaft gear, and the driving power is transmitted to the sleeve shaft and the output sprocket; at this time, the first sliding double-ratchet and the second sliding double-ratchet are in an idle state; under the unidirectional reverse action of the third unidirectional clutch, the sleeve shaft cannot transmit driving power to the first-gear middle shaft gear;
when changing from three gear to four gear,
when the pedal is used as power, the pedal transmits driving power to the center shaft, the second-gear center shaft gear transmits the driving power to the second-gear auxiliary shaft gear and the auxiliary shaft under the unidirectional forward action of the first one-way clutch, the second sliding double-ratchet wheel slides leftwards to enable the left ratchet wheel to be meshed with the inner ratchet wheel of the fourth-gear auxiliary shaft gear, and the driving power is transmitted to the fourth-gear center shaft gear to transmit the driving power to the sleeve shaft and the output sprocket; at this time, the first sliding double-ratchet and the third sliding double-ratchet are in an idle state; under the unidirectional reverse action of the third unidirectional clutch, the sleeve shaft cannot transmit driving power to the first-gear middle shaft gear;
when the motor is used as power, the motor transmits driving power to the transmission reduction gear and the transition gear, under the unidirectional forward action of the second unidirectional clutch, the second sliding double-ratchet wheel slides leftwards to enable the left ratchet wheel to be meshed with the inner ratchet of the four-gear auxiliary shaft gear, and the driving power is transmitted to the four-gear middle shaft gear to transmit the driving power to the sleeve shaft and the output sprocket; at this time, the first sliding double-ratchet and the third sliding double-ratchet are in an idle state; under the unidirectional reverse action of the third unidirectional clutch, the sleeve shaft cannot transmit driving power to the first-gear middle shaft gear;
when shifting from fourth gear to fifth gear,
when the pedal is used as power, the pedal transmits driving power to the center shaft, the second-gear center shaft gear transmits the driving power to the second-gear auxiliary shaft gear and the auxiliary shaft under the unidirectional forward action of the first one-way clutch, the first sliding double-ratchet wheel slides rightwards to enable the right ratchet wheel to be meshed with the inner ratchet wheel of the fifth-gear center shaft gear, and the driving power is transmitted to the fifth-gear center shaft gear to transmit the driving power to the sleeve shaft and the output sprocket; at this time, the second sliding double-ratchet and the third sliding double-ratchet are in an idle state; under the unidirectional reverse action of the third unidirectional clutch, the sleeve shaft cannot transmit driving power to the first-gear middle shaft gear;
when the motor is used as power, the motor transmits driving power to the transmission reduction gear and the transition gear, under the unidirectional forward action of the second unidirectional clutch, the driving power is transmitted to the auxiliary shaft, the first sliding double-ratchet wheel slides rightwards to enable the right ratchet wheel to be meshed with the inner ratchet wheel of the five-gear middle shaft gear, and the driving power is transmitted to the five-gear middle shaft gear to transmit the driving power to the sleeve shaft and the output sprocket; at this time, the second sliding double-ratchet and the third sliding double-ratchet are in an idle state; under the unidirectional reverse action of the third unidirectional clutch, the sleeve shaft cannot transmit driving power to the first-gear middle shaft gear;
when shifting from the fifth gear to the sixth gear,
when the pedal is used as power, the pedal transmits driving power to the center shaft, the second-gear center shaft gear transmits the driving power to the second-gear auxiliary shaft gear and the auxiliary shaft under the unidirectional forward action of the first unidirectional clutch, the third sliding double-ratchet wheel slides rightwards to enable the right ratchet wheel to be meshed with the inner ratchet wheel of the six-gear auxiliary shaft gear, and the driving power is transmitted to the six-gear center shaft gear to transmit the driving power to the sleeve shaft and the output sprocket; at this time, the first sliding double-ratchet and the second sliding double-ratchet are in an idle state; under the unidirectional reverse action of the third unidirectional clutch, the sleeve shaft cannot transmit driving power to the first-gear middle shaft gear;
when the motor is used as power, the motor transmits driving power to the transmission reduction gear and the transition gear, under the unidirectional forward action of the second unidirectional clutch, the driving power is transmitted to the auxiliary shaft, the third sliding double-ratchet wheel slides rightwards to enable the right ratchet wheel to be meshed with the inner ratchet wheel of the six-gear auxiliary shaft gear, and the driving power is transmitted to the six-gear middle shaft gear to transmit the driving power to the sleeve shaft and the output sprocket; at this time, the first sliding double-ratchet and the second sliding double-ratchet are in an idle state; under the unidirectional reverse action of the third unidirectional clutch, the sleeve shaft cannot transmit driving power to the first-gear middle shaft gear;
when shifting from six to seven speeds,
when the pedal is used as power, the pedal transmits driving power to the center shaft, the second-gear center shaft gear transmits the driving power to the second-gear auxiliary shaft gear and the auxiliary shaft under the unidirectional forward action of the first one-way clutch, the second sliding double-ratchet wheel slides rightwards to enable the right ratchet wheel to be meshed with the inner ratchet wheel of the seventh-gear auxiliary shaft gear, and the driving power is transmitted to the seventh-gear center shaft gear to transmit the driving power to the sleeve shaft and the output sprocket; at this time, the first sliding double-ratchet and the third sliding double-ratchet are in an idle state; under the unidirectional reverse action of the third unidirectional clutch, the sleeve shaft cannot transmit driving power to the first-gear middle shaft gear;
when the gear is released, the sequence is reversed.
By adopting the gear shifting method and combining a speed changing structure, the gear shifting is more stable.
The ratchet teeth are bevel gears, and when the working face of the ratchet teeth is stressed, the direction of the force faces the root of the ratchet teeth, so that the gear ratchet teeth and the sleeve ratchet teeth are automatically clamped, and torque is transmitted. The technical effect of adopting the mode to match and connect between the wheel and the ratchet wheel is as follows: (1) Because the internal ratchet gear and the one-way clutch are in a normally contacted state, the clutch is driven in an engaged state when power transmission is needed, and the clutch is slipped in a separated state when power transmission is not needed. (2) When clamping is needed, the ratchet wheel and the gear ratchet are easy to engage, and can be prevented from falling off; (3) With a speed difference, the ratchet teeth and the gear teeth are easily disengaged. The specific reasons are as follows: due to the angle of the ratchet, when the working face of the ratchet is stressed, the direction of the force faces the root of the ratchet, so that the ratchet and the gear ratchet are automatically clamped, and torque is transmitted. Because the back angle of the ratchet is gentle, the moment cannot be transmitted, and when the back of the ratchet is stressed, the direction of force is away from the tooth root, so that the ratchet and the gear are away from each other, and the ratchet and the gear are automatically separated.
The unidirectional forward transmission on the unidirectional clutch is more stable.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic perspective view of the first one-way clutch with the secondary axle gear of FIG. 1 removed;
FIG. 3 is a schematic view of the structure of the present invention in a first gear;
FIG. 4 is a schematic view of the structure of the present invention in a second gear;
FIG. 5 is a schematic illustration of the structure of the present invention in three gear;
FIG. 6 is a schematic structural view of the present invention in structural fourth gear;
FIG. 7 is a schematic illustration of the structure of the present invention in a fifth gear configuration;
FIG. 8 is a schematic view of the present invention in six gear configuration;
FIG. 9 is a schematic structural view of the present invention in seven gears;
fig. 10 is a schematic view of the positions of the first, second, and third one-way clutches (with the corresponding gears removed) in the configuration of the present invention.
In the identification of the drawing,
a middle shaft 1, a first one-way clutch 10 and a second-gear middle shaft gear 12;
the auxiliary shaft 2, a second-gear auxiliary shaft gear 22, a transition gear 4, a second one-way clutch 20, a fifth-gear auxiliary shaft gear 25, a fourth-gear auxiliary shaft gear 24, a second sliding double-ratchet wheel 52, a seventh-gear auxiliary shaft gear 27, a first-gear auxiliary shaft gear 21, a third-gear auxiliary shaft gear 23, a third sliding double-ratchet wheel 53 and a sixth-gear auxiliary shaft gear 26;
the sleeve shaft 3, the first sliding double-ratchet wheel 51, the five-gear middle shaft gear 35, the four-gear middle shaft gear 34, the seven-gear middle shaft gear 37, the first-gear middle shaft gear 31, the third one-way clutch 30, the three-gear middle shaft gear 33, the six-gear middle shaft gear 36 and the output sprocket 39;
pedal power input unit-pedal 5;
a power-assisted input unit, namely a motor 6, a motor output shaft 61 and a motor output gear 62;
a reduction gear 7 is driven.
Detailed Description
The technical scheme of the invention is further described below by means of the attached drawings and examples.
In the embodiment, the gears are seven gears, as shown in fig. 1-10, a multi-gear mid-motor comprises a central shaft 1, a sleeve shaft 3, an auxiliary shaft 2, pedals 5, a motor 62, a transmission reduction gear 7, a second one-way clutch 20 and a first one-way clutch 10, wherein,
the left section of the middle shaft 1 is sleeved with a second-gear middle shaft gear 12, and the second-gear middle shaft gear 12 is connected with the middle shaft 1 through a first one-way clutch 10;
the sleeve shaft 3 is sleeved on the right section of the middle shaft 1 on the right side of the second-gear middle shaft gear 12; the first sliding double-ratchet wheel is meshed with the ratchet of the second-gear middle shaft gear when sliding leftwards, and the power is transmitted to the sleeve shaft from the middle shaft; the sleeve shaft is sequentially provided with a first sliding double-ratchet wheel 51, a five-gear central shaft gear 35, a four-gear central shaft gear 34, a seven-gear central shaft gear 37, a first-gear central shaft gear 31, a three-gear central shaft gear 33, a six-gear central shaft gear 36 and an output sprocket 39 from left to right; wherein, the output sprocket 39 is fixedly connected to the sleeve shaft 3, and the first-gear middle shaft gear 31 is connected with the sleeve shaft 3 through a third one-way clutch 30; the five-gear center shaft gear 35, the four-gear center shaft gear 34, the seven-gear center shaft gear 37, the three-gear center shaft gear 33 and the six-gear center shaft gear 36 are fixedly sleeved on the sleeve shaft 3; the first sliding double-ratchet wheel 51 is in sliding sleeve connection with the sleeve shaft 3;
the auxiliary shaft 2 is sequentially provided with a second gear auxiliary shaft gear 22, a transition gear 4, a five-gear auxiliary shaft gear 25, a four-gear auxiliary shaft gear 24, a second sliding double-ratchet wheel 52, a seven-gear auxiliary shaft gear 27, a first gear auxiliary shaft gear 21, a three-gear auxiliary shaft gear 23, a third sliding double-ratchet wheel 53 and a six-gear auxiliary shaft gear 26 from left to right; the first-gear auxiliary shaft gear 21 and the second-gear auxiliary shaft gear 22 are fixedly connected to the auxiliary shaft 2, and the transition gear 4 is connected with the auxiliary center shaft 2 through a second one-way clutch 20; the second sliding double-ratchet wheel 52 and the third sliding double-ratchet wheel 53 are both in sliding sleeve connection with the auxiliary shaft 2, and the five-gear auxiliary shaft gear 25, the four-gear auxiliary shaft gear 24, the seven-gear auxiliary shaft gear 27, the three-gear auxiliary shaft gear 23 and the six-gear auxiliary shaft gear 26 are in idle sleeve connection with the auxiliary shaft 2;
the pedals 5 are fixedly connected to the left and right ends of the middle shaft 1, and transmit driving power to the middle shaft 1.
The motor 6 transmits driving power to the transition gear 4 through the transmission reduction gear 7;
the motor 6 includes a motor output shaft 61 and a motor output gear 62, the motor output gear 62 is fixed on the motor output shaft 61, and the motor output gear 62 transmits power to the transmission reduction gear 7 to the transition gear 4.
The novel power-assisted steering device is characterized by further comprising a shell, wherein two ends of the center shaft 1 penetrate out of the shell, the right end of the sleeve shaft 3 penetrates out of the right side of the shell, the output sprocket 39 is arranged on the right outer side of the shell, and the auxiliary shaft 2, the power-assisted input unit and the transmission reduction gear 7 are all accommodated in the shell.
The transition gear 4 corresponds to the position of the first sliding double-ratchet 51.
By adopting the gear shifting method of the multi-gear middle motor,
when in the starting first-gear position,
when the pedal 5 is used as power, the pedal transmits driving power to the middle shaft 1, the second-gear middle shaft gear 12 transmits the driving power to the first-gear auxiliary shaft gear 21 under the unidirectional forward action of the first unidirectional clutch 10 and then to the first-gear middle shaft gear 31, and the driving power is transmitted to the sleeve shaft 3 and the output chain wheel 39 under the unidirectional forward action of the third unidirectional clutch 30; at this time, the transition gear 4 does not transmit torsion force under the unidirectional reverse action of the second unidirectional clutch 20, and the transition gear 4 and the transmission reduction gear 7 do not cause the motor to rotate reversely; at this time, the first sliding double ratchet 51, the second sliding double ratchet 52 and the third sliding double ratchet 53 are all in the idle state;
when the motor 6 is used as power, the motor 6 transmits driving power to the transmission reduction gear 7 and the transition gear 4, under the unidirectional forward action of the second unidirectional clutch 20, the driving power is transmitted to the auxiliary shaft 2, then to the first gear auxiliary shaft gear 21 and the first gear middle shaft gear 31, and under the unidirectional forward action of the third unidirectional clutch 30, the driving power is transmitted to the sleeve shaft 3 and then to the output sprocket 39; at this time, under the unidirectional reverse action of the first unidirectional clutch 10, the second-gear middle shaft gear 12 and the middle shaft 1 do not transmit torsion, and the first sliding double-ratchet 51, the second sliding double-ratchet 52 and the third sliding double-ratchet 53 are all in a blank state;
when the first gear is changed to the second gear,
when the pedal 5 is used as power, the pedal transmits driving power to the middle shaft 1, the first sliding double-ratchet wheel 51 slides leftwards to enable the left ratchet to be meshed with the inner ratchet of the second-gear middle shaft gear 12, and the driving power is transmitted to the sleeve shaft 3 and the output sprocket 39; at this time, the second sliding double ratchet 52 and the third sliding double ratchet 53 are in the idle state;
when the motor 6 is used as power, the motor 6 transmits driving power to the transmission reduction gear 7 and the transition gear 4, under the unidirectional forward action of the second unidirectional clutch 20, the driving power is transmitted to the auxiliary shaft 2 and the second-gear auxiliary shaft gear 22 and then to the second-gear middle shaft gear 12, the first sliding double-ratchet wheel 51 slides leftwards to enable the left ratchet wheel to be meshed with the inner ratchet wheel of the second-gear middle shaft gear 12, and the driving power is transmitted to the sleeve shaft 3 and the output chain wheel 39; at this time, the second-gear bottom bracket gear 12 does not transmit driving power to the driving shaft 1 due to the unidirectional reverse direction of the first one-way clutch 10; the sleeve shaft 3 does not transmit driving power to the auxiliary shaft and the first-gear auxiliary shaft gear 21 due to the unidirectional reverse direction of the third unidirectional clutch 30; at this time, the second sliding double ratchet 52 and the third sliding double ratchet 53 are in the idle state;
when the gear is changed from the second gear to the third gear,
when the pedal 5 is used as power, the pedal transmits driving power to the middle shaft 1, the second-gear middle shaft gear 12 transmits the driving power to the second-gear auxiliary shaft gear 21 and the auxiliary shaft under the unidirectional forward action of the first unidirectional clutch 10, the third sliding double-ratchet wheel 53 slides leftwards to enable the left ratchet to be meshed with the inner ratchet of the third-gear auxiliary shaft gear 23, the driving power is transmitted to the third-gear middle shaft gear 33, and the driving power is transmitted to the sleeve shaft 3 and the output sprocket 39; at this time, the first sliding double ratchet 51 and the second sliding double ratchet 52 are in the idle state; under the unidirectional reverse action of the third unidirectional clutch 30, the sleeve shaft 3 does not transmit driving power to the first-gear middle shaft gear 31;
when the motor 6 is used as power, the motor 6 transmits driving power to the transmission reduction gear 7 and the transition gear 4, under the unidirectional forward action of the second unidirectional clutch 20, the driving power is transmitted to the auxiliary shaft 2, the third sliding double-ratchet wheel 53 slides leftwards to enable the left ratchet to be meshed with the inner ratchet of the three-gear auxiliary shaft gear 23, the driving power is transmitted to the three-gear middle shaft gear 33, and the driving power is transmitted to the sleeve shaft 3 and the output sprocket 39; at this time, the first sliding double ratchet 51 and the second sliding double ratchet 52 are in the idle state; under the unidirectional reverse action of the third unidirectional clutch 30, the sleeve shaft 3 does not transmit driving power to the first-gear middle shaft gear 31;
when changing from three gear to four gear,
when the pedal 5 is used as power, the pedal transmits driving power to the middle shaft 1, the second-gear middle shaft gear 12 transmits the driving power to the second-gear auxiliary shaft gear 21 and the auxiliary shaft under the unidirectional forward action of the first unidirectional clutch 10, the second sliding double-ratchet wheel 52 slides leftwards to enable the left ratchet to be meshed with the inner ratchet of the fourth-gear auxiliary shaft gear 24, and the driving power is transmitted to the fourth-gear middle shaft gear 34 to transmit the driving power to the sleeve shaft 3 and the output sprocket 39; at this time, the first sliding double ratchet 51 and the third sliding double ratchet 53 are in the idle state; under the unidirectional reverse action of the third unidirectional clutch 30, the sleeve shaft 3 does not transmit driving power to the first-gear middle shaft gear 31;
when the motor 6 is used as power, the motor 6 transmits driving power to the transmission reduction gear 7 and the transition gear 4, under the unidirectional forward action of the second unidirectional clutch 20, the driving power is transmitted to the auxiliary shaft 2, the second sliding double-ratchet wheel 52 slides leftwards to enable the left ratchet to be meshed with the inner ratchet of the four-gear auxiliary shaft gear 24, and the driving power is transmitted to the four-gear middle shaft gear 34 to transmit the driving power to the sleeve shaft 3 and the output sprocket 39; at this time, the first sliding double ratchet 51 and the third sliding double ratchet 53 are in the idle state; under the unidirectional reverse action of the third unidirectional clutch 30, the sleeve shaft 3 does not transmit driving power to the first-gear middle shaft gear 31;
when shifting from fourth gear to fifth gear,
when the pedal 5 is used as power, the pedal transmits driving power to the middle shaft 1, the second-gear middle shaft gear 12 transmits the driving power to the second-gear auxiliary shaft gear 21 and the auxiliary shaft under the unidirectional forward action of the first unidirectional clutch 10, the first sliding double-ratchet wheel 51 slides rightwards to enable the right ratchet to be meshed with the inner ratchet of the fifth-gear middle shaft gear 35, and the driving power is transmitted to the fifth-gear middle shaft gear 35 to transmit the driving power to the sleeve shaft 3 and the output sprocket 39; at this time, the second sliding double ratchet 52 and the third sliding double ratchet 53 are in the idle state; under the unidirectional reverse action of the third unidirectional clutch 30, the sleeve shaft 3 does not transmit driving power to the first-gear middle shaft gear 31;
when the motor 6 is used as power, the motor 6 transmits driving power to the transmission reduction gear 7 and the transition gear 4, under the unidirectional forward action of the second unidirectional clutch 20, the driving power is transmitted to the auxiliary shaft 2, the first sliding double-ratchet wheel 51 slides rightwards to enable the right ratchet to be meshed with the inner ratchet of the five-gear middle shaft gear 35, and the driving power is transmitted to the five-gear middle shaft gear 35 to transmit the driving power to the sleeve shaft 3 and the output sprocket 39; at this time, the second sliding double ratchet 52 and the third sliding double ratchet 53 are in the idle state; under the unidirectional reverse action of the third unidirectional clutch 30, the sleeve shaft 3 does not transmit driving power to the first-gear middle shaft gear 31;
when shifting from the fifth gear to the sixth gear,
when the pedal 5 is used as power, the pedal transmits driving power to the middle shaft 1, the second-gear middle shaft gear 12 transmits the driving power to the second-gear auxiliary shaft gear 21 and the auxiliary shaft under the unidirectional forward action of the first unidirectional clutch 10, the third sliding double-ratchet wheel 53 slides rightwards to enable the right ratchet to be meshed with the inner ratchet of the six-gear auxiliary shaft gear 26, and the driving power is transmitted to the six-gear middle shaft gear 36 to transmit the driving power to the sleeve shaft 3 and the output sprocket 39; at this time, the first sliding double ratchet 51 and the second sliding double ratchet 52 are in the idle state; under the unidirectional reverse action of the third unidirectional clutch 30, the sleeve shaft 3 does not transmit driving power to the first-gear middle shaft gear 31;
when the motor 6 is used as power, the motor 6 transmits driving power to the transmission reduction gear 7 and the transition gear 4, under the unidirectional forward action of the second unidirectional clutch 20, the driving power is transmitted to the auxiliary shaft 2, the third sliding double-ratchet wheel 53 slides rightwards to enable the right ratchet to be meshed with the inner ratchet of the six-gear auxiliary shaft gear 26, and the driving power is transmitted to the six-gear middle shaft gear 36 to transmit the driving power to the sleeve shaft 3 and the output sprocket 39; at this time, the first sliding double ratchet 51 and the second sliding double ratchet 52 are in the idle state; under the unidirectional reverse action of the third unidirectional clutch 30, the sleeve shaft 3 does not transmit driving power to the first-gear middle shaft gear 31;
when shifting from six to seven speeds,
when the pedal 5 is used as power, the pedal transmits driving power to the middle shaft 1, the second-gear middle shaft gear 12 transmits the driving power to the second-gear auxiliary shaft gear 21 and the auxiliary shaft under the unidirectional forward action of the first unidirectional clutch 10, the second sliding double-ratchet wheel 52 slides rightwards to enable the right ratchet to be meshed with the inner ratchet of the seventh-gear auxiliary shaft gear 27, and the driving power is transmitted to the seventh-gear middle shaft gear 37 to transmit the driving power to the sleeve shaft 3 and the output sprocket 39; at this time, the first sliding double ratchet 51 and the third sliding double ratchet 53 are in the idle state; under the unidirectional reverse action of the third unidirectional clutch 30, the sleeve shaft 3 does not transmit driving power to the first-gear middle shaft gear 31;
when the gear is released, the sequence is reversed.
The above description of the specific embodiments is only intended to aid in understanding the method of the present invention and its core concept, and it should be pointed out that it is possible for a person skilled in the art to make several improvements and modifications to the invention, such as simple changes in the tooth surface inclination angle, the number of teeth of the gear ratchet and the number of teeth of the sleeve ratchet, which also fall within the scope of protection of the claims of the present invention.

Claims (6)

1. The multi-gear middle motor comprises a middle shaft (1), an auxiliary shaft (2), a pedal power input unit, a power-assisted input unit and a transmission reduction gear (7), wherein the pedal power input unit is fixedly connected to the left end and the right end of the middle shaft (1) and transmits driving power to the middle shaft (1); the power-assisted input unit transmits driving power to the transition gear (4) through the transmission reduction gear (7), and is characterized in that: also comprises a sleeve shaft (3), a first one-way clutch (10) and a second one-way clutch (20),
the left section of the middle shaft (1) is sleeved with a second-gear middle shaft gear (12), and the second-gear middle shaft gear (12) is connected with the middle shaft (1) through the first one-way clutch (10);
the sleeve shaft (3) is sleeved on the right section of the middle shaft (1) on the right side of the second-gear middle shaft gear (12); the sleeve shaft is provided with at least a first sliding double-ratchet wheel (51), a first-gear central shaft gear (31) and an output chain wheel (39) from left to right, wherein the output chain wheel (39) is fixedly connected to the sleeve shaft (3), the first-gear central shaft gear (31) is connected with the sleeve shaft (3) through a third one-way clutch (30), and the first sliding double-ratchet wheel (51) is in sliding sleeve connection with the sleeve shaft (3);
the auxiliary shaft (2) is at least provided with a second-gear auxiliary shaft gear (22), a transition gear (4) and a first-gear auxiliary shaft gear (21) from left to right, wherein the first-gear auxiliary shaft gear (21) and the second-gear auxiliary shaft gear (22) are fixedly connected to the auxiliary shaft (2), and the transition gear (4) is connected with the auxiliary center shaft (2) through the second one-way clutch (20);
the first sliding double-ratchet wheel (51) is meshed with the ratchet teeth of the second-gear middle shaft gear (12) when sliding leftwards, and the power is transmitted to the sleeve shaft (3) from the middle shaft (1).
2. A multi-speed mid-motor as defined in claim 1, wherein: the middle motor for multi-gear shifting is a seven-gear middle motor,
the sleeve shaft is sequentially provided with a first sliding double-ratchet wheel (51), a five-gear middle shaft gear (35), a four-gear middle shaft gear (34), a seven-gear middle shaft gear (37), a first-gear middle shaft gear (31), a three-gear middle shaft gear (33), a six-gear middle shaft gear (36) and an output sprocket (39) from left to right; the output chain wheel (39) is fixedly connected to the sleeve shaft (3), and the first-gear middle shaft gear (31) is connected with the sleeve shaft (3) through a third one-way clutch (30); the five-gear center shaft gear (35), the four-gear center shaft gear (34), the seven-gear center shaft gear (37), the three-gear center shaft gear (33) and the six-gear center shaft gear (36) are fixedly sleeved on the sleeve shaft (3); the first sliding double-ratchet wheel (51) is in sliding sleeve connection with the sleeve shaft (3);
the auxiliary shaft (2) is sequentially provided with a second-gear auxiliary shaft gear (22), a transition gear (4), a five-gear auxiliary shaft gear (25), a four-gear auxiliary shaft gear (24), a second sliding double-ratchet wheel (52), a seven-gear auxiliary shaft gear (27), a first-gear auxiliary shaft gear (21), a three-gear auxiliary shaft gear (23), a third sliding double-ratchet wheel (53) and a six-gear auxiliary shaft gear (26) from left to right; the first-gear auxiliary shaft gear (21) and the second-gear auxiliary shaft gear (22) are fixedly connected to the auxiliary shaft (2), and the transition gear (4) is connected with the auxiliary center shaft (2) through a second one-way clutch (20); the second sliding double-ratchet wheel (52) and the third sliding double-ratchet wheel (53) are both in sliding sleeve connection with the auxiliary shaft (2), and the five-gear auxiliary shaft gear (25), the four-gear auxiliary shaft gear (24), the seven-gear auxiliary shaft gear (27), the three-gear auxiliary shaft gear (23) and the six-gear auxiliary shaft gear (26) are in idle sleeve connection with the auxiliary shaft (2).
3. A multi-speed mid-motor as defined in claim 2, wherein: the pedal power input unit is a pedal (5), the power-assisted input unit is a motor (6), the motor (6) comprises a motor output shaft (61) and a motor output gear (62), the motor output gear (62) is fixed on the motor output shaft (61), and the motor output gear (62) transmits power to the transmission reduction gear (7) to the transition gear (4).
4. A multi-speed mid-motor as defined in claim 1, wherein: the novel power-assisted bicycle is characterized by further comprising a shell, wherein two ends of the center shaft (1) penetrate out of the shell, the right end of the sleeve shaft (3) penetrates out of the right side of the shell, the output chain wheel (39) is arranged on the right outer side of the shell, and the auxiliary shaft (2), the power-assisted input unit and the transmission reduction gear (7) are all accommodated in the shell.
5. A multi-speed mid-motor as defined in claim 3, wherein: the transition gear 4 corresponds to the position of the first sliding double-ratchet (51).
6. A method of shifting a multi-speed center motor as defined in claim 5, wherein:
when in the first-gear position,
when the pedals (5) are used as power, the pedals (5) sequentially transmit driving power to the middle shaft (1), the first-gear auxiliary shaft gear (21), the first-gear middle shaft gear (31), the sleeve shaft (3) and the output chain wheel (39); at the moment, under the unidirectional reverse action of the second unidirectional clutch (20), the transition gear (4) and the transmission reduction gear (7) do not transmit torsion, so that the motor is not reversed; at this time, the first sliding double-ratchet (51), the second sliding double-ratchet (52) and the third sliding double-ratchet (53) are all in the idle state;
when the motor (6) is used as power, the motor (6) sequentially transmits driving power to a transmission reduction gear (7), a transition gear (4), an auxiliary shaft (2), a first-gear auxiliary shaft gear (21), a first-gear middle shaft gear (31), a sleeve shaft (3) and an output sprocket (39); the first sliding double-ratchet (51), the second sliding double-ratchet (52) and the third sliding double-ratchet (53) are all in the idle state;
when the vehicle is in the second gear position,
when the pedals (5) are used as power, the pedals (5) sequentially transmit the driving power to the middle shaft (1) and then to the sleeve shaft (3) and the output chain wheel (39); at this time, the first sliding double-ratchet (51) slides leftwards to enable the left ratchet to be meshed with the inner ratchet of the second gear middle shaft gear (12), and the second sliding double-ratchet (52) and the third sliding double-ratchet (53) are in a blank connection state;
when the motor (6) is used as power, the motor (6) sequentially transmits driving power to a transmission reduction gear (7), a transition gear (4), an auxiliary shaft (2), a second-gear auxiliary shaft gear (22), a second-gear middle shaft gear (12), a sleeve shaft (3) and an output sprocket (39); at this time, the first sliding double-ratchet (51) slides leftwards to enable the left ratchet to be meshed with the inner ratchet of the second gear middle shaft gear (12), and the second sliding double-ratchet (52) and the third sliding double-ratchet (53) are in a blank connection state;
when in the three-gear position,
when the pedal (5) is adopted as power, the pedal (5) sequentially transmits driving power to the middle shaft (1), the second-gear middle shaft gear, the second-gear auxiliary shaft gear (21), the auxiliary shaft (2), the third-gear middle shaft gear (33), the sleeve shaft (3) and the output chain wheel (39); at this time, the third sliding double-ratchet (53) slides leftwards to enable the left ratchet to be meshed with the inner ratchet of the three-gear auxiliary shaft gear (23), and the first sliding double-ratchet (51) and the second sliding double-ratchet (52) are in a blank connection state;
when the motor (6) is used as power, the motor (6) sequentially transmits driving power to the reduction gear (7), the transition gear (4), the auxiliary shaft (2), the three-gear middle shaft gear (33), the sleeve shaft (3) and the output chain wheel (39); at this time, the third sliding double-ratchet (53) slides leftwards to enable the left ratchet to be meshed with the inner ratchet of the three-gear auxiliary shaft gear (23), and the first sliding double-ratchet (51) and the second sliding double-ratchet (52) are in a blank connection state;
when in the four-gear position,
when the pedal (5) is adopted as power, the pedal (5) sequentially transmits driving power to the middle shaft (1), the second-gear auxiliary shaft gear (21), the auxiliary shaft, the fourth-gear middle shaft gear (34), the sleeve shaft (3) and the output chain wheel (39); at this time, the second sliding double-ratchet wheel 52 slides leftwards to enable the left ratchet wheel to be meshed with the inner ratchet wheel of the four-gear auxiliary shaft gear (24), and the first sliding double-ratchet wheel (51) and the third sliding double-ratchet wheel (53) are in a blank connection state;
when the motor (6) is used as power, the motor (6) sequentially transmits driving power to a transmission reduction gear (7), a transition gear (4), an auxiliary shaft (2), a four-gear auxiliary shaft gear (24), a four-gear middle shaft gear (34), a sleeve shaft (3) and an output chain wheel (39); at the moment, the second sliding double-ratchet wheel (52) slides leftwards to enable the left ratchet wheel to be meshed with the inner ratchet wheel of the four-gear auxiliary shaft gear (24), and the first sliding double-ratchet wheel (51) and the third sliding double-ratchet wheel (53) are in a blank connection state;
when the gear is in the five-gear position,
when the pedals (5) are used as power, the pedals (5) sequentially transmit driving power to the middle shaft (1), the secondary gear auxiliary shaft gear (21), the auxiliary shaft (2), the five-gear middle shaft gear (35), the sleeve shaft (3) and the output chain wheel (39); at this time, the first sliding double-ratchet wheel (51) slides rightward to enable the right ratchet wheel to be meshed with the inner ratchet wheel of the five-gear middle shaft gear (35), and the second sliding double-ratchet wheel (52) and the third sliding double-ratchet wheel (53) are in a blank connection state;
when the motor (6) is used as power, the motor (6) sequentially transmits driving power to a transmission reduction gear (7), a transition gear (4), an auxiliary shaft (2), a five-gear middle shaft gear (35), a sleeve shaft (3) and an output chain wheel (39); at this time, the second sliding double-ratchet (52) and the third sliding double-ratchet (53) are in the idle state; at this time, the first sliding double-ratchet wheel (51) slides rightward to enable the right ratchet wheel to be meshed with the inner ratchet wheel of the five-gear middle shaft gear (35), and the second sliding double-ratchet wheel (52) and the third sliding double-ratchet wheel (53) are in a blank connection state;
when in the six-speed position,
when the pedal (5) is adopted as power, the pedal (5) sequentially transmits driving power to the middle shaft (1), the secondary shaft gear (21), the secondary shaft, the six-gear middle shaft gear (36), the sleeve shaft (3) and the output chain wheel (39); at the moment, the third sliding double-ratchet wheel (53) slides rightwards to enable the right ratchet wheel to be meshed with the inner ratchet wheel of the six-gear auxiliary shaft gear (26), and the first sliding double-ratchet wheel (51) and the second sliding double-ratchet wheel (52) are in an idle connection state;
when the motor (6) is used as power, the motor (6) sequentially transmits driving power to a transmission reduction gear (7), a transition gear (4), an auxiliary shaft (2), a six-gear middle shaft gear (36), a sleeve shaft (3) and an output chain wheel (39); at this time, the third sliding double-ratchet (53) slides rightward to engage the right ratchet with the inner ratchet of the six-gear auxiliary shaft gear (26), and the first sliding double-ratchet (51) and the second sliding double-ratchet (52) are in a blank state;
when in the seven-speed position,
when the pedals (5) are used as power, the pedals (5) sequentially transmit driving power to the middle shaft (1), the secondary gear auxiliary shaft gear (21), the auxiliary shaft (2), the seven-gear middle shaft gear (37), the sleeve shaft (3) and the output chain wheel (39); at this time, the second sliding double-ratchet wheel 52 slides rightward to engage the right ratchet with the inner ratchet of the seven-gear auxiliary shaft gear (27), and the first sliding double-ratchet wheel (51) and the third sliding double-ratchet wheel (53) are in the idle state.
CN202311007241.4A 2023-08-11 2023-08-11 Multi-gear middle motor and gear shifting method thereof Pending CN116767412A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311007241.4A CN116767412A (en) 2023-08-11 2023-08-11 Multi-gear middle motor and gear shifting method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311007241.4A CN116767412A (en) 2023-08-11 2023-08-11 Multi-gear middle motor and gear shifting method thereof

Publications (1)

Publication Number Publication Date
CN116767412A true CN116767412A (en) 2023-09-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311007241.4A Pending CN116767412A (en) 2023-08-11 2023-08-11 Multi-gear middle motor and gear shifting method thereof

Country Status (1)

Country Link
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