CN113202873A - Middle axle bowl group structure for electric bicycle - Google Patents
Middle axle bowl group structure for electric bicycle Download PDFInfo
- Publication number
- CN113202873A CN113202873A CN202110492291.0A CN202110492291A CN113202873A CN 113202873 A CN113202873 A CN 113202873A CN 202110492291 A CN202110492291 A CN 202110492291A CN 113202873 A CN113202873 A CN 113202873A
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- CN
- China
- Prior art keywords
- shaft sleeve
- shaft
- bowl
- electric bicycle
- middle shaft
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000002238 attenuated effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/08—Rigid support of bearing units; Housings, e.g. caps, covers for spindles
- F16C35/10—Rigid support of bearing units; Housings, e.g. caps, covers for spindles with sliding-contact bearings
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a middle shaft bowl group structure for an electric bicycle, wherein two limiting flanges are arranged on a middle shaft, and the outer side surfaces of the limiting flanges are of arc-shaped concave surface structures; the inner edges of the outer end faces of the first shaft sleeve and the second shaft sleeve are of arc-shaped convex surface structures, the two shaft sleeves are sleeved on the middle shaft and are respectively positioned in the front tooth bowl and the back tooth bowl mounting cavities, the arc-shaped convex surfaces of the two shaft sleeves are in contact with the arc-shaped concave surface on the outer side of the limiting flange on the middle shaft, and the two shaft sleeves are in sliding contact fit; the elastic buffer is positioned at the inner end of the first shaft sleeve and/or the second shaft sleeve. Because the shaft sleeve and the limiting flange of the middle shaft are in sliding fit with a large contact surface, certain friction resistance can be generated when the shaft sleeve and the limiting flange of the middle shaft rotate relatively, and due to the existence of the elastic buffer part, the effect of automatic displacement compensation of friction loss of the shaft sleeve can be achieved, so that the generated friction force is slowly attenuated, and the problem that the motor of the electric bicycle drives the flywheel to rotate and drives the middle shaft crank to rotate together is solved.
Description
Technical Field
The invention belongs to the technical field of electric bicycles, and particularly relates to a middle shaft bowl group structure for an electric bicycle.
Background
The middle shaft bowl group used by the existing electric bicycle adopts a metal ball frame or a metal bearing structure, and the structure has the defect that a motor drives a flywheel to rotate and transmit to a middle shaft crank to rotate along with the middle shaft crank due to small rotating friction resistance when being applied to the electric bicycle, so that the safety risk that the crank rotates at high speed along with the middle shaft crank and damages legs or collides obstacles is caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a middle shaft bowl group structure for an electric bicycle.
The invention is realized by the following technical scheme:
a middle shaft bowl group structure for an electric bicycle comprises a middle shaft, an orthodontic bowl, a counter-tooth bowl, a first shaft sleeve, a second shaft sleeve and an elastic buffer piece;
the middle shaft is provided with two limiting flanges, and the outer side surfaces of the limiting flanges are of arc concave surface structures;
the first shaft sleeve and the second shaft sleeve are identical in structure, and the inner edge of the outer end face of the first shaft sleeve is of an arc convex surface structure;
the middle shaft transversely penetrates through the right-handed thread bowl and the left-handed thread bowl, the first shaft sleeve is sleeved on the middle shaft and is positioned in the mounting cavity of the right-handed thread bowl, the arc convex surface of the first shaft sleeve is in contact with the arc concave surface on the outer side of one limiting flange on the middle shaft, the arc convex surface and the arc concave surface are in sliding contact fit, and the freedom degree of axial rotation around the middle shaft is achieved; the second shaft sleeve is sleeved on the middle shaft and is positioned in the mounting cavity of the reverse tooth bowl, the arc-shaped convex surface of the second shaft sleeve is contacted with the arc-shaped concave surface on the outer side of the other limiting flange on the middle shaft, and the second shaft sleeve and the arc-shaped concave surface are in sliding contact fit and have freedom degree of axial rotation around the middle shaft;
the elastic buffer piece is positioned at the inner end of the first shaft sleeve and/or the inner end of the second shaft sleeve and is used for playing a role in automatic displacement compensation of friction loss of the shaft sleeves.
In the technical scheme, the limiting flange is arranged along the circumferential direction of the middle shaft.
In the above technical solution, the height of the position-limiting flanges is preferably 5-10mm, and the axial distance between two position-limiting flanges is preferably 6-12 cm.
In the above technical solution, the shape of the inner side surface of the limit flange is not limited, and may be a slope or an arc surface.
In the above technical scheme, the inner end faces of the first shaft sleeve and the second shaft sleeve are planes.
In the technical scheme, the positive thread bowl is fixed with the left end of the five-way pipe of the electric bicycle frame through thread matching, and the negative thread bowl is fixed with the right end of the five-way pipe of the electric bicycle frame through thread matching.
In the technical scheme, the outer end of the orthodontic bowl and/or the anti-orthodontic bowl is/are provided with the sealing ring.
In the above technical scheme, the elastic buffer part adopts an elastic washer and a soft rubber material.
In the above technical solution, the elastic buffer member is a spring.
In the technical scheme, the spring sleeve is arranged on the periphery of the center shaft, one end of the spring is in top contact with the inner end of the installation cavity of the tooth bowl, the other end of the spring is in top contact with the outer end of the shaft sleeve, the groove for positioning the spring is formed in the top contact surface of the inner end of the installation cavity of the tooth bowl and the spring, the end part of the spring is installed into the groove, the spring is prevented from radially shaking, the spring is prevented from being in contact with the center shaft and the inner wall of the tooth bowl, and friction and working noise are reduced.
In the technical scheme, the bosses are arranged on the outer walls of the first shaft sleeve and the second shaft sleeve, and the corresponding limiting grooves are arranged on the inner walls of the mounting cavities on the positive tooth bowl and the negative tooth bowl, so that the first shaft sleeve and the second shaft sleeve are fixed with the tooth bowl, and the rotation of the middle shaft can be avoided.
The invention has the advantages and beneficial effects that:
the crank follower provided by the invention has the advantages of simple structure and reliable performance, can effectively solve the problem of the follow-up rotation of the crank of the middle shaft of the electric bicycle, and increases guarantee for the riding safety of consumers. Because the shaft sleeve and the limiting flange of the middle shaft are in sliding fit with a large contact surface, certain friction resistance can be generated when the shaft sleeve and the limiting flange of the middle shaft rotate relatively, and due to the existence of the elastic buffer part, the effect of automatic displacement compensation of friction loss of the shaft sleeve can be achieved, so that the generated friction force is slowly attenuated, and the problem that the motor of the electric bicycle drives the flywheel to rotate and drives the middle shaft crank to rotate together is solved.
Drawings
Fig. 1 is a schematic structural view of a bottom bracket bearing bowl group of the present invention.
Fig. 2 is an enlarged view of a mounting structure at the first bushing shown in fig. 1.
Fig. 3 is an enlarged view of the mounting structure at the second hub shown in fig. 1.
Fig. 4 is a schematic view of the installation structure of the spring in the tooth bowl.
Fig. 5 is a structure view of the matching between the tooth bowl and the shaft sleeve.
Wherein:
1: middle shaft, 2: orthodontic bowl, 3: reverse tooth bowl, 4: first sleeve, 5: second shaft sleeve, 6: cushion washer, 7: and (5) sealing rings.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the present invention is further described below with reference to specific examples.
Example one
Referring to fig. 1-3, a middle axle bowl set structure for an electric bicycle comprises a middle axle 1, a right tooth bowl 2, a reverse tooth bowl 3, a first axle sleeve 4, a second axle sleeve 5 and a buffer washer 6.
The middle shaft 1 is provided with two limiting flanges 1.1 and 1.2, the limiting flanges are arranged along the circumferential direction of the middle shaft, the height of the limiting flanges is preferably 5-10mm, and the axial distance between the two limiting flanges is preferably 6-12 cm. The outer side surface of the limiting flange is of an arc concave surface structure (the outer side surface of the limiting flange refers to the side, facing the outer end of the middle shaft, of the limiting flange), and the roughness of the arc concave surface is preferably 0.4-1.2; the shape of the inner side surface of the limiting flange is not limited, and can be in the shapes of an inclined surface or an arc surface and the like (the inner side surface of the limiting flange refers to one side of the limiting flange facing the center position of the middle shaft), and the roughness of the inner side surface of the limiting flange is not required.
The first shaft sleeve 4 and the second shaft sleeve 5 are identical in structure, the inner edge of the outer end face of the first shaft sleeve is of an arc convex surface structure, and the inner end face of the first shaft sleeve is a plane.
The positive thread bowl 2 is matched and fixed with the left end of the five-way pipe of the frame of the electric bicycle through threads, and the negative thread bowl 3 is matched and fixed with the right end of the five-way pipe of the frame of the electric bicycle through threads; the middle shaft 1 is transversely arranged in the right tooth bowl 2 and the reverse tooth bowl 3 in a penetrating way.
The first shaft sleeve 4 and the buffer gasket 6 are sleeved on the middle shaft 1, the first shaft sleeve 4 and the buffer gasket 6 are located in an installation cavity of the right-handed thread bowl 2, an arc-shaped convex surface of the first shaft sleeve 4 is in contact with an arc-shaped concave surface on the outer side of the first limiting flange 1.1 on the middle shaft, the arc-shaped convex surface and the arc-shaped concave surface are in sliding contact fit and have freedom degree of axial rotation around the middle shaft, and the buffer gasket 6 is located at the inner end of the first shaft sleeve 4. The second shaft sleeve 5 is sleeved on the middle shaft, the second shaft sleeve 5 is positioned in the mounting cavity of the reverse tooth bowl 3, the arc-shaped convex surface of the second shaft sleeve 5 is in contact with the arc-shaped concave surface on the outer side of the second limiting flange 1.2 on the middle shaft, the second shaft sleeve and the second limiting flange are in sliding contact fit, and the freedom degree of axial rotation around the middle shaft is achieved. Therefore, the positioning and installation of the middle shaft 1 are realized through the first shaft sleeve 4 and the second shaft sleeve 5.
The buffer washer 6 is made of soft rubber materials, elastic jacking force to the first limiting flange can be provided for the first shaft sleeve through the buffer washer (acting force enabling the whole middle shaft to be rightward), close contact between the first shaft sleeve and the first limiting flange can be kept through the buffer washer, and the second limiting flange on the middle shaft can be in close contact with the second shaft sleeve.
Because the shaft sleeve and the limiting flange of the middle shaft are in sliding fit with a large contact surface, certain friction resistance can be generated when the shaft sleeve and the limiting flange of the middle shaft rotate relatively, and the buffering washer plays a role in automatic displacement compensation of friction loss of the shaft sleeve, so that the generated friction force is slowly attenuated, and the problem that the motor of the electric bicycle drives the flywheel to rotate and drives the middle shaft crank to rotate together is solved.
Example two
On the basis of the first embodiment, furthermore, another buffer washer can be arranged at the inner end of the second shaft sleeve to increase the elastic compensation effect.
EXAMPLE III
On the basis of the first embodiment, furthermore, a sealing ring 7 is arranged at the outer end of the orthodontic bowl and/or the anti-dental bowl.
Example four
The difference between the present embodiment and the first embodiment is: referring to the attached drawing 4, the buffer washer can be replaced by a spring 8, the diameter of the spring 8 is larger than that of the center shaft, the spring is sleeved on the periphery of the center shaft, one end of the spring is in abutting contact with the inner end of the installation cavity of the tooth bowl, the other end of the spring is in abutting contact with the outer end of the shaft sleeve, a groove 9 for positioning the spring is formed in the abutting contact surface of the inner end of the installation cavity of the tooth bowl and the spring, the end portion of the spring is installed into the groove 9, the spring is prevented from radially shaking, the spring is prevented from being in contact with the center shaft and the inner wall of the tooth bowl, and friction and working noise are reduced.
EXAMPLE five
On the basis of the above embodiment, further referring to fig. 5, in order to prevent the first shaft sleeve and the second shaft sleeve from rotating with the center shaft, the outer walls of the first shaft sleeve and the second shaft sleeve are provided with bosses 10, and the inner walls of the installation cavities on the orthodontic bowl and the anti-orthodontic bowl are provided with corresponding limiting grooves 11, so that the first shaft sleeve 4 and the second shaft sleeve 5 are fixed with the orthodontic bowl and cannot rotate with the center shaft.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (10)
1. The utility model provides a well axle bowl group structure for electric bicycle which characterized in that: the gear box comprises a middle shaft, a right-handed bowl, a reverse-handed bowl, a first shaft sleeve, a second shaft sleeve and an elastic buffer piece;
the middle shaft is provided with two limiting flanges, and the outer side surfaces of the limiting flanges are of arc concave surface structures;
the first shaft sleeve and the second shaft sleeve are identical in structure, and the inner edge of the outer end face of the first shaft sleeve is of an arc convex surface structure;
the middle shaft transversely penetrates through the right-handed thread bowl and the left-handed thread bowl, the first shaft sleeve is sleeved on the middle shaft and is positioned in the mounting cavity of the right-handed thread bowl, the arc convex surface of the first shaft sleeve is in contact with the arc concave surface on the outer side of one limiting flange on the middle shaft, the arc convex surface and the arc concave surface are in sliding contact fit, and the freedom degree of axial rotation around the middle shaft is achieved; the second shaft sleeve is sleeved on the middle shaft and is positioned in the mounting cavity of the reverse tooth bowl, the arc-shaped convex surface of the second shaft sleeve is contacted with the arc-shaped concave surface on the outer side of the other limiting flange on the middle shaft, and the second shaft sleeve and the arc-shaped concave surface are in sliding contact fit and have freedom degree of axial rotation around the middle shaft;
the elastic buffer piece is positioned at the inner end of the first shaft sleeve and/or the inner end of the second shaft sleeve and is used for playing a role in automatic displacement compensation of friction loss of the shaft sleeves.
2. The bottom bracket bearing assembly structure for an electric bicycle according to claim 1, wherein: the limiting flange is arranged along the circumferential direction of the middle shaft.
3. The bottom bracket bearing assembly structure for an electric bicycle according to claim 1, wherein: the height of the limiting flanges is 5-10mm, and the axial distance between the two limiting flanges is 6-12 cm.
4. The bottom bracket bearing assembly structure for an electric bicycle according to claim 1, wherein: the inner end surfaces of the first shaft sleeve and the second shaft sleeve are planes.
5. The bottom bracket bearing assembly structure for an electric bicycle according to claim 1, wherein: the positive thread bowl is fixed with the left end of the electric bicycle frame five-way pipe through thread matching, and the negative thread bowl is fixed with the right end of the electric bicycle frame five-way pipe through thread matching.
6. The bottom bracket bearing assembly structure for an electric bicycle according to claim 1, wherein: and a sealing ring is arranged at the outer end of the orthodontic bowl and/or the anti-orthodontic bowl.
7. The bottom bracket bearing assembly structure for an electric bicycle according to claim 1, wherein: the elastic buffer part adopts an elastic washer and a soft rubber material.
8. The bottom bracket bearing assembly structure for an electric bicycle according to claim 1, wherein: the elastic buffer part adopts a spring.
9. The bottom bracket bearing assembly structure for an electric bicycle according to claim 8, wherein: the spring sleeve is in the axis periphery, and the one end of spring is pushed up with the installation cavity inner of tooth bowl and is touched, and the spring other end pushes up with the axle sleeve outer end and touches, is provided with the recess that is used for positioning spring on the installation cavity inner of tooth bowl and the face that touches on the top of spring, and the tip of spring is installed into the recess, prevents that the spring from radially rocking, makes the spring not take place the contact with axis and tooth bowl inner wall.
10. The bottom bracket bearing assembly structure for an electric bicycle according to claim 1, wherein: the outer walls of the first shaft sleeve and the second shaft sleeve are provided with bosses, and the inner walls of the installation cavities on the positive tooth bowl and the negative tooth bowl are provided with corresponding limiting grooves, so that the first shaft sleeve and the second shaft sleeve are fixed with the tooth bowl, and the middle shaft cannot rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110492291.0A CN113202873A (en) | 2021-05-06 | 2021-05-06 | Middle axle bowl group structure for electric bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110492291.0A CN113202873A (en) | 2021-05-06 | 2021-05-06 | Middle axle bowl group structure for electric bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113202873A true CN113202873A (en) | 2021-08-03 |
Family
ID=77030047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110492291.0A Pending CN113202873A (en) | 2021-05-06 | 2021-05-06 | Middle axle bowl group structure for electric bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113202873A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3040226U (en) * | 1997-02-04 | 1997-08-15 | 金成 林 | Fitting type five-way pipe section with adjustable axis |
| WO2010142067A1 (en) * | 2009-06-08 | 2010-12-16 | 北京联合大学 | Rotary swash plate and rod type continuously variable transmission |
| CN208979049U (en) * | 2018-11-06 | 2019-06-14 | 深圳市奥酷曼智能技术有限公司 | Converse magnetostriction axis torque sensor |
| CN209535364U (en) * | 2019-02-27 | 2019-10-25 | 宁波巨隆机械股份有限公司 | A kind of ultralight composite Fast Installation Middle shaft assembly of child's bicycle |
| DE102019214761A1 (en) * | 2018-10-05 | 2020-04-09 | Shimano Inc. | BICYCLE CRANK ARRANGEMENT |
| CN211731721U (en) * | 2020-01-13 | 2020-10-23 | 昆山朗德森机电科技有限公司 | Center shaft structure of moped and moped |
-
2021
- 2021-05-06 CN CN202110492291.0A patent/CN113202873A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3040226U (en) * | 1997-02-04 | 1997-08-15 | 金成 林 | Fitting type five-way pipe section with adjustable axis |
| WO2010142067A1 (en) * | 2009-06-08 | 2010-12-16 | 北京联合大学 | Rotary swash plate and rod type continuously variable transmission |
| DE102019214761A1 (en) * | 2018-10-05 | 2020-04-09 | Shimano Inc. | BICYCLE CRANK ARRANGEMENT |
| CN208979049U (en) * | 2018-11-06 | 2019-06-14 | 深圳市奥酷曼智能技术有限公司 | Converse magnetostriction axis torque sensor |
| CN209535364U (en) * | 2019-02-27 | 2019-10-25 | 宁波巨隆机械股份有限公司 | A kind of ultralight composite Fast Installation Middle shaft assembly of child's bicycle |
| CN211731721U (en) * | 2020-01-13 | 2020-10-23 | 昆山朗德森机电科技有限公司 | Center shaft structure of moped and moped |
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Application publication date: 20210803 |
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| RJ01 | Rejection of invention patent application after publication |