CN207595177U - Quick detachable bicycle middle shaft - Google Patents
Quick detachable bicycle middle shaft Download PDFInfo
- Publication number
- CN207595177U CN207595177U CN201721190573.0U CN201721190573U CN207595177U CN 207595177 U CN207595177 U CN 207595177U CN 201721190573 U CN201721190573 U CN 201721190573U CN 207595177 U CN207595177 U CN 207595177U
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- CN
- China
- Prior art keywords
- middle shaft
- bicycle middle
- quick detachable
- connecting pole
- crank connecting
- Prior art date
- 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.)
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model discloses a kind of quick detachable bicycle middle shaft, including middle shaft body, it is located at the crank connecting pole in the middle shaft body left and right ends portion respectively, shape, the size of any cross section of the crank connecting pole are identical.The utility model can greatly save the working time, improve working efficiency, while avoid because of the damage of components caused by overexertion the phenomenon that, eliminating additional maintenance cost, promoting economic benefit.
Description
Technical field
The utility model is related to a kind of quick detachable bicycle middle shafts.
Background technology
It is well known that bicycle be life in the most common vehicles, as the essential parts of bicycle it
One, bicycle middle shaft is the five logical rotation sections that are interior, being mainly used for connecting left and right crank that cycle frame is mounted on by bearing
Part, left and right crank connect the foot pedal of both sides respectively, as the important component for receiving passing power.In the prior art, voluntarily
The crank connecting portion in vehicle axis left and right ends portion is with certain taper, the direction extended from the middle part of bicycle middle shaft to both sides,
The area of the cross section of same crank connecting portion is less and less, from the side that bicycle middle shaft plugs to opposite another on crank
Its inner space of side is less and less, when crank is plugged with bicycle middle shaft cooperation, the crank connection of bicycle middle shaft end
Portion is locked in crank, screw is recycled to further fix crank and bicycle middle shaft, firstly, since bicycle middle shaft both ends
The crank connecting portion band in portion is tapered, and the two is fixed as one to the locking power of bicycle middle shaft using crank, once voluntarily
Vehicle damages, and needs to detach tightly stuck bicycle middle shaft with crank using auxiliary tool such as hammer, in dismounting certainly
Longer time can be expended during driving axis and crank, greatly reduces working efficiency, and be likely to result in component
Damage, increase maintenance cost, secondly, the bicycle middle shaft used in the prior art be by steel material be made it is solid in
Axis, itself has larger weight, increases the burden ridden, and the production cost and use cost of this solid axis
Higher, economic benefit is low.
Invention content
The utility model aim is：A kind of quick detachable bicycle middle shaft is provided.
The technical solution of the utility model is：A kind of quick detachable bicycle middle shaft, the bicycle middle shaft include axis
Ontology, the crank connecting pole for being located at the middle shaft body left and right ends portion respectively, any cross section of the crank connecting pole
Shape, size are identical.
Further, cross section described in the use of the new type is the radial section of the crank connecting pole.
Further, it is evenly distributed on the outer profile of crank connecting pole described in the use of the new type multiple radially-inwardly recessed
Keyway, per the fin projected radially outward is formed between two neighboring keyway, the keyway is with the fin respectively along flat
Row extends in axially direction.
Further, in the use of the new type on same cross section, the most convex surface of multiple fins and multiple keys
The most concave surface of slot is located on two concentric circles respectively.
Further, middle shaft body described in the use of the new type and the boundary cross section of the corresponding crank connecting pole are
Circle, the round diameter are more than the round diameter where the keyway most concave surface.
Further, the crank connecting pole that the bicycle middle shaft both ends are respectively arranged in the use of the new type fails to agree
It is right symmetrical.
Further, bicycle middle shaft described in the use of the new type is axially to have in the hollow spline of through hole along it
Axis, on the one hand reduces the weight of axis in itself, and mitigation is ridden burden, on the other hand reduces production cost, economic benefit by
This is promoted.
Further, bicycle middle shaft described in the use of the new type is made by low-carbon chrome-moly steel, similary
Low-carbon nickel chrome-moly steel is lighter on the basis of meeting required intensity in actual use, is further reduced the weight of axis, mitigates
It rides burden.
The utility model has the following advantages compared with prior art：The utility model provides a kind of quick detachable bicycle
The technical solution of axis, bicycle middle shaft include middle shaft body and are connected respectively positioned at the crank in middle shaft body left and right ends portion
Column, since shape, the size of any cross section of crank connecting pole are identical, i.e., crank connecting pole is without taper in itself
, when bicycle middle shaft is connected by the crank connecting pole without taper and crank, crank can be vertically sheathed on certainly
It drives a vehicle on axis, can easily detach crank and bicycle middle shaft in dismounting, the working time is not only greatly saved, improve work
Make efficiency, while avoid because of the damage of components caused by overexertion the phenomenon that, eliminate additional maintenance cost, promote warp
Ji benefit.
Description of the drawings
The utility model is further described with reference to the accompanying drawings and embodiments：
Fig. 1 is the stereoscopic schematic diagram of bicycle middle shaft described in the utility model；
Fig. 2 is the vertical view of bicycle middle shaft described in the utility model；
Fig. 3 is the side view of bicycle middle shaft described in the utility model；
Fig. 4 is the structural perspective of bicycle middle shaft described in the utility model；
Fig. 5 is the specific assembling schematic diagram of bicycle middle shaft described in the utility model；
Fig. 6 is the structure diagram that Fig. 5 is completed.
Wherein：1st, bicycle middle shaft；10th, middle shaft body；11st, crank connecting pole；111st, keyway；112nd, fin；12nd, ratchet
Group connecting portion；2nd, crank；3rd, ratchet group；4th, bearing；5th, drive sleeve；6th, gear mass.
Specific embodiment
Embodiment：
A kind of a kind of specific embodiment of quick detachable bicycle middle shaft of the utility model is shown with reference to Fig. 1 to Fig. 6,
The bicycle middle shaft 1 includes middle shaft body 10, the crank connecting pole 11 for being located at the middle 10 left and right ends portion of shaft body respectively,
Shape, the size of any cross section of the crank connecting pole 11 are identical, wherein, the cross section is connected for the crank
The radial section of column 11, in the present embodiment, with reference to shown in attached drawing, first, on the outer profile of the crank connecting pole 11 uniformly
Eight radially-inwardly recessed keyways 111 are distributed with, per two neighboring keyway 111 between form the fin 112 projected radially outward,
The keyway 111 extends with the fin 112 respectively along axially direction is parallel to, with the axis of the crank connecting pole 11
Centered on point, the keyway 111 sets around the central point isogonism, and the angle between adjacent two keyways 111 is equal
It is 45 degree, secondly, on same cross section, the most convex surface of multiple fins 112 and the most concave surface point of multiple keyways 111
Wei Yu not be on two concentric circles, the boundary cross section of the middle shaft body 10 and the corresponding crank connecting pole 11 is circle,
The round diameter is equal to the round diameter where the most convex surface of fin 112, more than the circle where the most concave surface of keyway 111
Diameter, and the crank connecting pole 11 for being respectively arranged on 1 both ends of bicycle middle shaft is mutually symmetrical, since crank connects
Shape, the size for connecing any cross section of column 11 are identical, i.e., crank connecting pole 11 itself works as bicycle middle shaft without taper
1 with crank 2 when being connected respectively by the crank connecting pole 11 without taper, and crank 2 can be vertically sheathed in bicycle
On axis 1, then further fixed by screw, screw need to be only removed in dismounting, can easily detach crank 2 with voluntarily
Vehicle axis 1, not only saves the operating time, greatly improves work efficiency, while can also avoid caused by overexertion zero
The damage of part eliminates additional maintenance cost, promotes economic benefit；Specifically with reference to shown in Fig. 5, Fig. 6, the bicycle middle shaft
It is additionally provided with the ratchet group connecting portion 12 being connected with transmission mechanism on 1, on the outer profile of the ratchet group connecting portion 12 uniformly
There are six radially outer protrusion, the transmission mechanism includes being sheathed on successively from left to right on the bicycle middle shaft 1 for distribution
Ratchet group 3, bearing 4, drive sleeve 5 and gear mass 6, protrusion on the ratchet group connecting portion 12 and the ratchet group
Click-fit on 3 uses, and the ratchet group 3 is sheathed on the ratchet group connecting portion 12, the ratchet group connecting portion 12, spine
Wheel group 3, bearing 4 are set in the drive sleeve 5, and the drive sleeve 5 is equipped with screw thread close to the one end of the gear mass 6, described
Gear mass 6 is equipped with the screw thread of mating connection so that drive sleeve 5 and gear mass 6 to be fixed as one；Specifically with reference to shown in Fig. 4, institute
It is the hollow spline axis for axially having along it through hole to state bicycle middle shaft 1, on the one hand can reduce the weight of bicycle middle shaft 1
Amount mitigates burden of riding, and has on the other hand saved making material requested, and economic effect is further promoted while reducing production cost
Benefit in addition, the bicycle middle shaft 1 is made by low-carbon chrome-moly steel, confirms that its intensity meets after practical operation
On the basis of user is actually required, low-carbon chrome-moly steel is lighter, can further reduce the weight of bicycle middle shaft 1, subtract
Light cavalry's row burden.
Certain above-described embodiment is only the technical concepts and features for illustrating the utility model, and its object is to allow be familiar with this
The people of technology can understand the content of the utility model and implement according to this, and the protection model of the utility model can not be limited with this
It encloses.Any modifications made in accordance with the spirit of the main technical solutions of the utility model should all cover the guarantor in the utility model
Within the scope of shield.
Claims (7)
1. a kind of quick detachable bicycle middle shaft, the bicycle middle shaft (1) be located at including middle shaft body (10), respectively it is described in
The crank connecting pole (11) in shaft body (10) left and right ends portion, it is characterised in that：The crank connecting pole (11) it is any transversal
Shape, the size in face are identical, are evenly distributed on the outer profile of the crank connecting pole (11) multiple radially-inwardly recessed
Keyway (111), per forming the fin (112) projected radially outward between two neighboring keyway (111), the keyway (111) with
The fin (112) extends respectively along axially direction is parallel to.
2. quick detachable bicycle middle shaft according to claim 1, it is characterised in that：The cross section connects for the crank
Connect the radial section of column (11).
3. quick detachable bicycle middle shaft according to claim 1, it is characterised in that：On same cross section, Duo Gesuo
The most convex surface of fin (112) is stated with the most concave surface of multiple keyways (111) to be respectively located on two concentric circles.
4. quick detachable bicycle middle shaft according to claim 1, it is characterised in that：The middle shaft body (10) with it is corresponding
The boundary cross section of the crank connecting pole (11) is circle, which is more than where the keyway (111) most concave surface
Round diameter.
5. quick detachable bicycle middle shaft according to claim 1, it is characterised in that：It is respectively arranged on the bicycle middle shaft
(1) the crank connecting pole (11) at both ends is mutually symmetrical.
6. quick detachable bicycle middle shaft according to claim 1, it is characterised in that：The bicycle middle shaft (1) is edge
It axially has the hollow spline axis of through hole.
7. quick detachable bicycle middle shaft according to claim 1, it is characterised in that：The bicycle middle shaft (1) be by
Low-carbon chrome-moly steel is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721190573.0U CN207595177U (en) | 2017-09-18 | 2017-09-18 | Quick detachable bicycle middle shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721190573.0U CN207595177U (en) | 2017-09-18 | 2017-09-18 | Quick detachable bicycle middle shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207595177U true CN207595177U (en) | 2018-07-10 |
Family
ID=62756207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721190573.0U Active CN207595177U (en) | 2017-09-18 | 2017-09-18 | Quick detachable bicycle middle shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207595177U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109398579A (en) * | 2018-11-29 | 2019-03-01 | 八方电气(苏州)股份有限公司 | Bicycle square opening axis |
-
2017
- 2017-09-18 CN CN201721190573.0U patent/CN207595177U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109398579A (en) * | 2018-11-29 | 2019-03-01 | 八方电气(苏州)股份有限公司 | Bicycle square opening axis |
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| GR01 | Patent grant |