CN113859414A

CN113859414A - Speed reducer gear of power-assisted bicycle

Info

Publication number: CN113859414A
Application number: CN202111214862.0A
Authority: CN
Inventors: 夏建敏; 何元春; 费跃
Original assignee: Zhejiang Xiaxia Precision Manufacturing Co ltd
Current assignee: Zhejiang Xiaxia Precision Manufacturing Co ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2021-12-31
Anticipated expiration: 2041-10-19
Also published as: CN113859414B

Abstract

A gear of a speed reducer of a power-assisted bicycle is arranged in an adjustable gear transmission mechanism, and the transmission mechanism comprises an outer cover, an adjusting assembly and a transmission assembly. The adjusting assembly and the transmission assembly are arranged inside the outer cover. The transmission assembly comprises a motor driving gear, a driven gear, an intermediate driven gear, a pedal driving gear which are sequentially meshed for transmission, and a motor driving shaft, a driven shaft, an intermediate driven shaft and a pedal driving shaft which are correspondingly arranged. The pedal driving shaft and the pedal driving gear are installed in a matched mode through a clutch bearing, the pedal driving shaft penetrates through a moving groove in the outer cover, cranks are arranged at two ends of the pedal driving shaft, and pedals are arranged at the other ends of the cranks. And the adjusting assembly is provided with an adjusting rod and an adjuster. According to the invention, the transmission structure of the pedal is movably designed, so that the adjustable function of the pedal is realized, and a user can obtain more comfortable experience after adjustment.

Description

Speed reducer gear of power-assisted bicycle

Technical Field

The invention is applied to the field of power-assisted electric bicycles, and particularly relates to a speed reducer gear of a power-assisted bicycle.

Background

An electric bicycle is an electromechanical integrated personal transportation tool which is added with a storage battery as an auxiliary energy source on the basis of a common bicycle. With the popularity of the sharing bicycle, the development of the electric bicycle as a derivative type of the sharing bicycle is also rapidly growing.

Electric bicycle on the existing market generally has the function of adjusting the stool, and what this function mainly solved is that the user can not adapt to the position of sitting or the posture of riding when using electric bicycle because of reasons such as height. But in the in-service use occasion, because the handlebar is fixed, lead to adjusting the bench of sitting and must make user's upper part of the body gesture change, the in-process of riding can be more labourious on the contrary, has reduced and has used experience.

Therefore, based on the defects in the prior art, the application further researches the gear transmission structure on the power-assisted bicycle.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a speed reducer gear of a power-assisted bicycle, and particularly provides a gear transmission mechanism of the speed reducer gear, wherein a pedal is movably designed, so that a user can obtain more comfortable experience after adjustment.

In order to solve the above technical problems, the present invention is solved by the following technical solutions.

A gear of a speed reducer of a power-assisted bicycle is arranged in an adjustable gear transmission mechanism, and the gear transmission mechanism comprises a transmission mechanism outer cover, an adjusting assembly and a transmission assembly. The dustcoat is provided with motor installation position, driven shaft fixed position inwards on one side, the dustcoat still is provided with the adjustment tank and the shifting chute that link up. The adjusting assembly is arranged inside the outer cover and comprises a driven shaft mounting hole, an intermediate driven shaft mounting hole and a pedal driving shaft mounting hole which are sequentially arranged, wherein the driven shaft mounting hole and the pedal driving shaft mounting hole are through holes, the intermediate driven shaft mounting hole is a blind hole, an adjusting rod is arranged on the adjusting assembly, and the adjusting rod can be used for adjusting the pedal by matching an adjusting groove arranged on an adjuster at the top of the adjusting rod and the adjusting groove arranged on the outer cover.

The transmission assembly comprises a motor driving gear, a driven gear, an intermediate driven gear and a pedal driving gear which are sequentially meshed for transmission, the driven gear, the intermediate driven gear and the pedal driving gear correspond to driven shafts, intermediate driven shafts, pedal driving shafts and driven shaft mounting holes, intermediate driven shaft mounting holes and pedal driving shaft mounting holes which are arranged correspondingly to the adjusting assembly, the driven shafts, the intermediate driven shafts and the pedal driving shaft mounting holes are matched in a mounting mode through bearing mechanisms, the motor driving shaft which corresponds to the motor driving gear is arranged on the motor, and the motor is fixed on a motor mounting position of the outer cover.

The driven shaft is far away from the one end of driven gear and is installed on the driven shaft fixed position of dustcoat through bearing mechanism, and the top that is provided with the one end of driven gear is provided with the chain wheel, and the chain wheel passes through chain drive bicycle rear wheel and rotates.

The pedal driving shaft and the pedal driving gear are installed in a matched mode through the clutch bearing, when the electric bicycle is driven by the motor, the clutch bearing is in a clutch state, and the pedal driving shaft does not rotate along with the rotation of the pedal driving gear; when electric bicycle is stepped on the footboard by the manpower foot and is driven, clutch bearing converts the laminating state into, and footboard drive gear rotates along with the rotation of footboard drive shaft to it is rotatory to drive middle driven gear through the meshing transmission, and then drives driven gear rotatory.

The pedal driving shaft penetrates through the moving groove in the outer cover, cranks are arranged at two ends of the pedal driving shaft, and pedals are arranged at the other ends of the cranks.

In a preferred embodiment, the adjusting groove and the moving groove are semi-circular rings with a fixed center of the driven shaft as a center, so that the adjusting range of the device is limited while the simplicity of the structure is considered.

In a preferred embodiment, the adjusting groove is uniformly distributed with positioning bulges, and the pedal driving shaft is fixed by the adjuster and the positioning bulges after being adjusted in place, so that the mobility of the pedal driving shaft after being fixed is limited.

In a preferred embodiment, the adjusting component is not in contact with the motor and can rotate by a certain angle around the circle center of the mounting hole of the driven shaft, and the function of adjusting the pedal is realized through the rotation.

In a preferred embodiment, the adjusting component is provided with an adjusting rod on one side close to the outer cover, and the device can be positioned and fixed by using the adjuster on the adjusting rod and the positioning bulge of the adjusting groove.

In a preferred embodiment, the top of the adjusting rod is provided with a threaded section which can be matched with the adjuster, so that a user can conveniently adjust and fix the adjusting rod according to personal actual conditions.

In a preferred embodiment, the bottom of the adjuster is dimensioned to be smaller than the maximum width of the adjustment slot and larger than the minimum width of the adjustment slot, so as to avoid failure of the adjuster and failure of the pedal drive shaft to be fixed.

Compared with the prior art, the invention has the following beneficial effects: the utility model provides a booster bicycle reduction gear, during adjustable gear drive mechanism was located to the gear, owing to carried out the design that makes the transmission structure of footboard portable, realized the function that the footboard is adjustable for the user can obtain more comfortable experience after the adjustment.

Drawings

Fig. 1 is a perspective view of a transmission.

Fig. 2 is a schematic front plan view of the housing.

Fig. 3 is a perspective view of the back of the housing.

FIG. 4 is a perspective view of the transmission with the cover removed.

FIG. 5 is a top view of the transmission with the cover removed.

FIG. 6 is a perspective view of the transmission with the housing and gears removed.

Fig. 7 is a perspective view of the adjustment assembly.

In the figure, the reference numeral 1 is a housing, wherein the reference numeral 11 is a motor mounting position, the reference numeral 12 is a driven shaft fixing position, the reference numeral 13 is an adjusting groove, the reference numeral 131 is a positioning protrusion, and the reference numeral 14 is a moving groove.

Reference numeral 2 denotes an adjustment assembly, wherein reference numeral 21 denotes a driven shaft mounting hole, reference numeral 22 denotes a middle driven shaft mounting hole, reference numeral 23 denotes a pedal driving shaft mounting hole, reference numeral 24 denotes an adjustment lever, and reference numeral 25 denotes an adjuster.

Numeral 3 is a transmission assembly, wherein 31 is a motor driving gear, 311 is a motor driving shaft, 312 is a motor, 32 is a driven gear, 321 is a driven shaft, 33 is an intermediate driven gear, 331 is an intermediate driven shaft, 34 is a pedal driving gear, 341 is a pedal driving shaft, 342 is a clutch bearing, 35 is a chain wheel, 36 is a crank, and 37 is a pedal.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The embodiments described below by referring to the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout, are exemplary only for explaining the present invention, and are not construed as limiting the present invention.

In describing the present invention, it is to be understood that the terms: the terms center, longitudinal, lateral, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, and thus, should not be construed as limiting the present invention. Furthermore, the terms: first, second, etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features shown. In describing the present invention, unless otherwise expressly specified or limited, the terms: mounting, connecting, etc. should be understood broadly, and those skilled in the art will understand the specific meaning of the terms in this application as they pertain to the particular situation.

Referring to fig. 1 to 7, a gear of a speed reducer of a power-assisted bicycle in the present application is provided in an adjustable gear transmission mechanism, and the gear transmission mechanism comprises a housing 1, an adjusting assembly 2 and a transmission assembly 3. The adjusting assembly 2 and the transmission assembly 3 are arranged inside the housing 1.

Referring to fig. 2 and 3, a motor installation position 11 and a driven shaft fixing position 12 are arranged on one inward side of the outer cover 1, the outer cover 1 is further provided with a through adjusting groove 13 and a through moving groove 14, the adjusting groove 13 and the moving groove 14 are semicircular rings with the circle center of the driven shaft fixing position 12 as the center, and certain limitation is made on the adjusting range of the device while considering the simplicity of the structure. The adjusting groove 13 is uniformly distributed with positioning protrusions 131, and when the pedal is adjusted in place, the pedal is fixed by the adjuster 25 and the positioning protrusions 131 to limit the mobility of the pedal driving shaft 341 after being fixed.

Referring to fig. 7, the adjusting assembly 2 includes a driven shaft mounting hole 21, a middle driven shaft mounting hole 22 and a pedal driving shaft mounting hole 23, which are sequentially arranged, wherein the driven shaft mounting hole 21 and the pedal driving shaft mounting hole 23 are through holes, and the middle driven shaft mounting hole 22 is a blind hole. An adjusting rod 24 is arranged on one side of the adjusting component 2 close to the outer cover 1, and the adjusting rod and the adjusting component are fixed through welding and other modes. The top of the adjusting rod 24 is provided with a threaded section, and the position of the threaded section is provided with an adjuster 25. The size of the bottom of the adjuster 25 is smaller than the maximum width of the adjusting groove 13 and larger than the minimum width of the adjusting groove 13, so that the phenomenon that the adjuster 25 fails and the pedal driving shaft 341 cannot be fixed is avoided. The user can adjust the pedal 37 by using the adjuster 25 in cooperation with the adjustment groove 13 of the housing 1. The transmission assembly 3 is including meshing driven motor drive gear 31, driven gear 32, middle driven gear 33 and pedal drive gear 34 in proper order, driven gear 32, middle driven gear 33, pedal drive gear 34 correspond driven shaft 321, middle driven shaft 331, the pedal drive shaft 341 that sets up and the driven shaft mounting hole 21 that the regulating assembly 2 corresponds, middle driven shaft mounting hole 22 and pedal drive shaft mounting hole 23 pass through bearing mechanism installation cooperation, motor drive gear 31 corresponds the motor drive shaft 311 that sets up and sets up on motor 312, motor 312 is fixed on the motor installation position 11 of dustcoat 1. The adjusting assembly 2 is not in contact with the motor 312, and can rotate by a certain angle around the circle center of the driven shaft mounting hole 21, and the adjusting function of the pedal 37 is realized through the rotation.

Wherein, the one end that driven shaft 321 kept away from driven gear 32 passes through bearing mechanism and installs on the driven shaft fixed position 12 of dustcoat 1, and the top of the one end that is provided with driven gear 32 is provided with chain wheel 35, and chain wheel 35 passes through chain drive bicycle rear wheel and rotates. The pedal driving shaft 341 and the pedal driving gear 34 are cooperatively installed through a clutch bearing 342, when the electric bicycle is driven by the motor 312, the clutch bearing 342 is in a clutch state, and the pedal driving shaft 341 does not rotate along with the rotation of the pedal driving gear 34; when the electric bicycle is driven by the manual pedal 37, the clutch bearing 342 is switched to the engaging state, and the pedal driving gear 34 rotates with the rotation of the pedal driving shaft 341, and drives the intermediate driven gear 33 to rotate through the meshing transmission, and further drives the driven gear 32 to rotate. The pedal driving shaft 341 passes through the moving slot 14 of the housing 1 and is provided with a crank 36 at both ends, and the other end of the crank 36 is provided with a pedal 37.

When a user needs to adjust the pedal 37, the adjuster 25 is first screwed out according to the thread of the threaded section of the adjusting lever 24, and the adjusting assembly 2 is in a movable state. When the positioning is completed, the adjuster 25 is screwed down to ensure that the bottom of the adjuster 25 is in the adjusting groove 13 without pressing the positioning protrusion 131, and the adjusting assembly 2 is in a fixed state, and the adjustment is completed.

The scope of the present invention includes, but is not limited to, the above embodiments, and the present invention is defined by the appended claims, and any alterations, modifications, and improvements that may occur to those skilled in the art are all within the scope of the present invention.

Claims

1. A speed reducer gear of a power-assisted bicycle is characterized in that the gear is arranged in an adjustable gear transmission mechanism, and the transmission mechanism comprises an outer cover, an adjusting assembly and a transmission assembly;

a motor mounting position and a driven shaft fixing position are arranged on one inward side of the outer cover, and the outer cover is also provided with a through adjusting groove and a through moving groove;

the adjusting assembly is arranged in the outer cover and comprises a driven shaft mounting hole, an intermediate driven shaft mounting hole and a pedal driving shaft mounting hole which are sequentially arranged, wherein the driven shaft mounting hole and the pedal driving shaft mounting hole are through holes, the intermediate driven shaft mounting hole is a blind hole, an adjusting rod is arranged on the adjusting assembly, and the adjusting rod is matched with an adjusting groove in the outer cover by using an adjuster arranged at the top of the adjusting rod to adjust the pedal;

the transmission assembly comprises a motor driving gear, a driven gear, an intermediate driven gear and a pedal driving gear which are sequentially meshed for transmission, the driven gear, the intermediate driven gear and a driven shaft which is arranged corresponding to the pedal driving gear, the intermediate driven shaft, a pedal driving shaft and a driven shaft mounting hole which is corresponding to the adjusting assembly, the intermediate driven shaft mounting hole and the pedal driving shaft mounting hole are mounted and matched through a bearing mechanism, a motor driving shaft which is arranged corresponding to the motor driving gear is arranged on the motor, and the motor is fixed on a motor mounting position of the outer cover;

wherein: one end of the driven shaft, which is far away from the driven gear, is arranged on a driven shaft fixing position of the outer cover through a bearing mechanism, and the top of one end provided with the driven gear is provided with a chain wheel; the pedal driving shaft and the pedal driving gear are installed in a matched mode through a clutch bearing, the pedal driving shaft penetrates through a moving groove in the outer cover, cranks are arranged at two ends of the pedal driving shaft, and a pedal is arranged at the other end of each crank;

the adjusting assembly is not in contact with the motor and can rotate at a certain angle by taking the circle center of the mounting hole of the driven shaft as the center;

an adjusting rod is arranged on one side of the adjusting component close to the outer cover; the top of the adjusting rod is provided with a threaded section which can be matched with the adjuster; the bottom dimension of the adjuster is smaller than the maximum width of the adjustment slot and larger than the minimum width of the adjustment slot.

2. A reduction gear for moped according to claim 1, wherein the adjustment groove and the moving groove are semi-circular rings centered on a fixed center of the driven shaft.

3. A speed reducer gear for moped according to claim 2, wherein the adjusting grooves are evenly distributed with positioning protrusions.