CN209889048U - Crank device of electric bicycle - Google Patents
Crank device of electric bicycle Download PDFInfo
- Publication number
- CN209889048U CN209889048U CN201920325095.2U CN201920325095U CN209889048U CN 209889048 U CN209889048 U CN 209889048U CN 201920325095 U CN201920325095 U CN 201920325095U CN 209889048 U CN209889048 U CN 209889048U
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- Prior art keywords
- crank
- electric bicycle
- bicycle according
- shaft
- rotating part
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Abstract
The utility model discloses a crank device of an electric bicycle, which comprises a shaft sleeve, a middle shaft, a chain wheel, a right crank and a left crank, wherein the middle shaft is rotatably connected inside the shaft sleeve, two ends of the middle shaft are provided with a transmission part and a threaded hole, a right crank pin is connected with the transmission part and is fixedly connected with the transmission part through a fastener, the chain wheel is fixedly connected on the right crank, the crank device also comprises a fixed part and a connecting piece, and the fixed part is arranged on the transmission part of the left crank; one end of the left crank, which is close to the middle shaft, is a rotating part, and the end is provided with a through hole; the left crank and the right crank are in central symmetry around the central point of the central shaft, or the left crank and the right crank are in axial symmetry around the longitudinal central line of the central shaft. The utility model discloses when using, can fast switch over one side crank assembly direction, light solution ride time has long felt two legs extremely uncomfortable difficult problem.
Description
Technical Field
The utility model relates to an electric bicycle technical field especially relates to an electric bicycle's crank device.
Background
An electric bicycle is a mechatronic personal transportation tool which takes a storage battery as auxiliary energy and is provided with an electric motor, a controller, the storage battery, a rotating handle brake handle and other operating components and a display instrument system on the basis of a common bicycle.
The electric motor car on the existing market is of a great variety, and most of electric motor cars lead to traffic accidents frequently because bulky, heavy, fast, and a lot of electric motor cars just can't ride after losing electronic helping hand function, and this gives passerby and brings certain potential safety hazard. According to various shortcomings of existing electric vehicles, a new electric bicycle standard GB 17761-2018 is provided, one of the standards is that the electric bicycle can be manually ridden (the electric bicycle must be ridden for 5 kilometers within half an hour), in order to meet the new standard, an electric vehicle enterprise only manufactures and produces qualified electric vehicles again to share the big cake in the electric vehicle market, and a plurality of portable electric bicycles are born under the condition.
However, the portable foldable electric bicycle which can be carried with a four-wheel car lacks a fixed pedal for placing feet during electric riding, and people feel uncomfortable after a little long time of riding posture that two feet of people are only placed on the pedals of the crank, one foot is lower and one foot is higher or two legs are half-bent in tandem.
Therefore, it is necessary to provide a crank device for an electric bicycle to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electric bicycle's crank device, the device can fast switch over crank assembly direction, and two cranks are central symmetry just like normal bicycle crank when the helping hand was ridden, and two cranks are the axial symmetry when electricelectric was ridden and pedal at lower department promptly two, and the person's of riding both feet can be very comfortable put on pedal like this to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a crank device of an electric bicycle comprises a shaft sleeve, a middle shaft, a chain wheel, a right crank and a left crank, wherein the middle shaft is rotatably connected inside the shaft sleeve; one end of the left crank, which is close to the middle shaft, is a rotating part, and the end is provided with a through hole; the left crank and the right crank are in central symmetry around the central point of the central shaft, or the left crank and the right crank are in axial symmetry around the longitudinal central line of the central shaft.
The utility model discloses a further improvement is, transmission portion is square axle, and the middle part of annular fixed part is equipped with the quad slit with special-shaped axle adaptation, and the outer wall and the fixed connection of transmission portion are located to the fixed part cover in transmission portion, and the fixed part outside symmetry be equipped with four lugs, and four lugs correspond four faces of transmission portion respectively.
The utility model discloses a further improvement is, be equipped with the recess that corresponds with four lugs on the rotating part, the left side crank passes through the crisscross interlock of recess on the rotating part and connects the lug on the fixed part.
The utility model discloses a further improvement is, the screw rod of connecting piece for having the dog, the screw rod passes through-hole and spiro union in the screw hole so that rotating part fixed connection is in the fixed part.
The utility model discloses a further improvement scheme is, the external dimension of dog is greater than the internal diameter size of through-hole.
The utility model discloses a further improvement scheme is, be equipped with the boss and the concave station of adaptation on the fixed part is relative with the rotating part.
The utility model discloses a further improvement scheme is, still including articulating in the quick detach handle of dog.
The utility model discloses a further improvement is, still locate the locking pad on the screw rod between dog and the rotating part including the cover, and quick detach handle and dog link are the eccentric body, and the locking pad is the concave cambered surface with the butt face of quick detach handle, and the quick detach handle rotates so that eccentric body extrusion locking pad.
The utility model discloses a further improvement is, the locking pad is sunken to be set up in the surface of rotating part.
The utility model discloses a further improvement scheme is, the centraxonial tip rotation is kept away from with right side crank to left side crank is connected with pedal.
The utility model has the advantages that:
one, the utility model discloses when using, can the fast switch-over crank assembly direction, two cranks are central symmetry just like normal bicycle crank when the helping hand was ridden, and two cranks are the axial symmetry when electricelectric moved to ride and step on all at lower promptly two, and person's both feet by bike can be very comfortable put on pedal like this.
The surface of the fixing part opposite to the rotating part of the utility model is provided with a boss and a concave platform which are adaptive, the boss is firstly inserted into the concave platform, so that the rotating part can rotate along the fixing part, and the butt joint of the groove and the lug is convenient; in addition, the arrangement of the lug boss also ensures that the length of the fixing part sleeved on the middle shaft is increased, so that the fixing part is safer.
Thirdly, the utility model discloses installed the quick detach handle additional at the tip of connecting piece to in dismantlement or erection joint spare, more convenient laborsaving.
Four, the utility model discloses still overlap on the screw rod between dog and rotating part and locate the locking pad, quick detach handle and dog link are the eccentric body, and during rotatory quick detach handle, the eccentric body can compress tightly left side crank for the more firm of rotating part and fixed part laminating promotes this crank device's security performance.
Fifthly, the utility model discloses a locking pad is sunken to be set up in the surface of rotating part, can make locking pad quick positioning like this, makes things convenient for the articulate quick assembly disassembly in left side.
Drawings
Fig. 1 is the utility model discloses two crank position relation schematic diagrams when helping hand was ridden.
Fig. 2 is an exploded view of the left crank of the present invention.
Fig. 3 is a schematic view of the left crank installation of the present invention.
Fig. 4 is a schematic structural view of the fixing portion in the direction of a in fig. 2.
Fig. 5 is a schematic view of the position relationship between the two cranks when the electric vehicle is running.
In the figure: 1-shaft sleeve, 2-middle shaft, 3-chain wheel, 4-right crank, 5-left crank, 6-threaded hole, 7-fixed part, 8-connecting piece, 9-rotating part, 10-through hole, 11-convex block, 12-groove, 13-boss, 14-concave table, 15-quick-release handle, 16-locking pad, 17-eccentric body, 18-pedal and 19-transmission part.
Detailed Description
The present invention will be further clarified by the following detailed description, which is to be understood as being given only for the purpose of illustration and not for the purpose of limiting the scope of the invention, and modifications of various equivalent forms of the invention which are obvious to those skilled in the art after reading the present invention, all falling within the scope of the appended claims.
Example 1: as shown in fig. 1-5, a crank device of an electric bicycle comprises a shaft sleeve 1, a middle shaft 2, a chain wheel 3, a right crank 4 and a left crank 5, wherein the middle shaft 2 is rotatably connected inside the shaft sleeve 1 through a bearing, two ends of the middle shaft 2 are provided with transmission parts 19 and threaded holes 6, the right crank 4 is pinned on the transmission parts 19 and fixedly connected to the transmission parts 19 through fasteners, the chain wheel 3 is fixedly connected or welded on the right crank 4 through bolts, the crank device further comprises a fixing part 7 and a connecting part 8, and the fixing part 7 is arranged on the transmission part 19 of the left crank 5; one end of the left crank 5 close to the middle shaft 2 is a rotating part 9 and is provided with a through hole 10, the left crank 5 is in concave-convex connection with the fixing part 7 through the rotating part 9, and the left crank 5 is fixedly connected with the fixing part 7 through a connecting piece 8; the left crank 5 and the right crank 4 are in central symmetry with the central point of the central shaft 2, or the left crank 5 and the right crank 4 are in axial symmetry with the longitudinal central line of the central shaft 2.
The transmission portion 19 is a square shaft, a square hole matched with the special-shaped shaft is formed in the middle of the annular fixing portion 7, the fixing portion 7 is sleeved on the outer wall of the transmission portion 19 and is bonded on the transmission portion 19 through metal glue, four convex blocks 11 are symmetrically arranged on the outer side of the fixing portion 7, and the four convex blocks 11 correspond to four faces of the transmission portion 19 respectively.
The rotating part 9 is provided with grooves 12 corresponding to the four lugs 11, and the left crank 5 is connected with the lugs 11 on the fixing part 7 through the grooves 12 on the rotating part 9 in a staggered engagement manner.
The connecting piece 8 is a screw rod with a stop block, the screw rod penetrates through the through hole 10 and is in threaded connection with the threaded hole 6 so that the rotating part 9 is fixedly connected to the fixing part 7, and the outer size of the stop block is larger than the inner diameter size of the through hole 10.
The surface of the fixed part 7 opposite to the rotating part 9 is provided with a matched boss 13 and a matched concave platform 14.
The ends of the left crank 5 and the right crank 4 far away from the middle shaft 2 are rotationally connected with a pedal 18
The specific working principle of the embodiment is as follows: when the bicycle is ridden with the assistance, the left crank 5 and the right crank 4 are in central symmetry with the central point of the middle shaft 2 like a normal bicycle crank; when the pure electric bicycle is ridden, the connecting piece 8 is loosened, the left crank 5 moves outwards to enable the groove 12 and the bump 11 to be completely separated, the left crank 5 is rotated to be axisymmetric with the right crank 4 by using the longitudinal center line of the central shaft 2, the left crank 5 moves inwards to enable the groove 12 and the bump 11 to be in staggered occlusion connection, and finally the left crank 5 and the fixing part 7 are fixedly connected through the connecting piece 8.
Example 2: the present embodiment is different from embodiment 1 in that the connecting member 8 of embodiment 1 needs to be disassembled and assembled by an auxiliary tool, which is troublesome to disassemble and assemble; in the present embodiment, the above-mentioned defects can be avoided, specifically:
the quick release handle 15 is hinged to the stop block, in the embodiment, holes are formed in the stop block and the quick release handle 15, and the quick release handle 15 is connected with the stop block through a pin shaft; the quick-release handle 15 in this embodiment ensures more convenience and labor saving when the connecting piece 8 is detached or installed.
Otherwise, this embodiment is identical to embodiment 1, and will not be described herein.
Example 3: the embodiment is a further improvement of the embodiment 2, and the main improvement is that one end of the quick release handle 15 of the embodiment 2 is a free end, so that the quick release handle 15 can swing to generate noise or influence normal riding during riding; furthermore, the left crank 5 and the fixing part 7 are not fixed firmly by the connecting piece 8; in the present embodiment, the above-mentioned defects can be avoided, specifically:
the quick release handle 15 is provided with a locking pad 16 sleeved on a screw rod between the stop block and the rotating part 9, the connecting end of the quick release handle 15 and the stop block is an eccentric body 17, the abutting surface of the locking pad 16 and the quick release handle 15 is a concave arc surface, and the quick release handle 15 rotates to enable the eccentric body 17 to extrude the locking pad 16; the locking pad 16 is concavely arranged on the outer surface of the rotating part 9; when the connecting piece 8 is disassembled, the end of the eccentric body 17 far away from the central point is separated from the concave arc surface of the locking pad 16 by rotating the quick-release handle 15; after the position of the left crank 5 is adjusted, the quick release handle 15 is rotated to enable the end, far away from the central point, of the eccentric body 17 to enter the concave arc surface, the eccentric body 17 extrudes the locking pad 16, and the locking pad 16 compresses the left crank 5, so that the rotating part 9 and the fixing part 7 are attached more firmly, and the safety performance of the crank device is improved; in the locked state, the quick release handle 15 is also intended to rest against the left crank 5.
Otherwise, this embodiment is identical to embodiment 2, and will not be described herein.
Claims (10)
1. The utility model provides an electric bicycle's crank device, includes axle sleeve (1), axis (2), chain wheel (3), right side crank (4) and left side crank (5), axis (2) rotate to be connected inside axle sleeve (1), and the both ends of axis (2) are transmission portion (19) and are equipped with screw hole (6), and right side crank (4) pin joint is in transmission portion (19) and through fastener fixed connection in transmission portion (19), and chain wheel (3) fixed connection is on right side crank (4), its characterized in that: the crank mechanism further comprises a fixing part (7) and a connecting piece (8), wherein the fixing part (7) is arranged on the transmission part (19) of the left crank (5); one end, close to the middle shaft (2), of the left crank (5) is a rotating part (9) and is provided with a through hole (10), the left crank (5) is in concave-convex connection with the fixing part (7) through the rotating part (9), and the left crank (5) is fixedly connected with the fixing part (7) through a connecting piece (8); the left crank (5) and the right crank (4) are in central symmetry around the central point of the middle shaft (2), or the left crank (5) and the right crank (4) are in axial symmetry around the longitudinal central line of the middle shaft (2).
2. The crank device of an electric bicycle according to claim 1, wherein: the transmission portion (19) is a square shaft, the middle of the annular fixing portion (7) is provided with a square hole matched with the special-shaped shaft, the fixing portion (7) is sleeved on the outer wall of the transmission portion (19) and is fixedly connected to the transmission portion (19), four bumps (11) are symmetrically arranged on the outer side of the fixing portion (7), and the four bumps (11) correspond to four faces of the transmission portion (19) respectively.
3. The crank device of an electric bicycle according to claim 2, wherein: the rotating portion (9) is provided with grooves (12) corresponding to the four lugs (11), and the left crank (5) is connected to the lugs (11) on the fixing portion (7) through the grooves (12) on the rotating portion (9) in a staggered engagement mode.
4. A crank device of an electric bicycle according to claim 3, wherein: the connecting piece (8) is a screw rod with a stop block, and the screw rod penetrates through the through hole (10) and is in threaded connection with the threaded hole (6) so that the rotating part (9) is fixedly connected to the fixing part (7).
5. The crank device of an electric bicycle according to claim 4, wherein: the outer dimension of the stopper is larger than the inner diameter dimension of the through hole (10).
6. The crank device of an electric bicycle according to claim 5, wherein: and a boss (13) and a concave table (14) which are matched with each other are arranged on the surface of the fixed part (7) opposite to the rotating part (9).
7. The crank device of an electric bicycle according to claim 6, wherein: also comprises a quick-release handle (15) hinged with the stop block.
8. The crank device of an electric bicycle according to claim 7, wherein: the quick release handle is characterized by further comprising a locking pad (16) sleeved on the screw rod between the stop block and the rotating part (9), the connecting end of the quick release handle (15) and the stop block is an eccentric body (17), the abutting surface of the locking pad (16) and the quick release handle (15) is a concave arc surface, and the quick release handle (15) rotates to enable the eccentric body (17) to extrude the locking pad (16).
9. The crank device of an electric bicycle according to claim 8, wherein: the locking pad (16) is concavely arranged on the outer surface of the rotating part (9).
10. A crank device of an electric bicycle according to any one of claims 2 to 9, wherein: the end parts, far away from the middle shaft (2), of the left crank (5) and the right crank (4) are rotatably connected with pedals (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920325095.2U CN209889048U (en) | 2019-03-14 | 2019-03-14 | Crank device of electric bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920325095.2U CN209889048U (en) | 2019-03-14 | 2019-03-14 | Crank device of electric bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209889048U true CN209889048U (en) | 2020-01-03 |
Family
ID=68997313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920325095.2U Withdrawn - After Issue CN209889048U (en) | 2019-03-14 | 2019-03-14 | Crank device of electric bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209889048U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109795605A (en) * | 2019-03-14 | 2019-05-24 | 江苏爱特福股份有限公司 | A kind of crank device of electric bicycle |
-
2019
- 2019-03-14 CN CN201920325095.2U patent/CN209889048U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109795605A (en) * | 2019-03-14 | 2019-05-24 | 江苏爱特福股份有限公司 | A kind of crank device of electric bicycle |
| CN109795605B (en) * | 2019-03-14 | 2023-08-18 | 江苏爱特福股份有限公司 | Crank device of electric bicycle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200103 Effective date of abandoning: 20230818 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20200103 Effective date of abandoning: 20230818 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |