CN115465017A - Low-resistance transmission mechanism and bicycle - Google Patents
Low-resistance transmission mechanism and bicycle Download PDFInfo
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- CN115465017A CN115465017A CN202211280707.3A CN202211280707A CN115465017A CN 115465017 A CN115465017 A CN 115465017A CN 202211280707 A CN202211280707 A CN 202211280707A CN 115465017 A CN115465017 A CN 115465017A
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- magnetic
- main body
- magnetic force
- transmission mechanism
- limiting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/02—Hubs adapted to be rotatably arranged on axle
- B60B27/023—Hubs adapted to be rotatably arranged on axle specially adapted for bicycles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The invention discloses a low-resistance transmission mechanism and a bicycle, wherein the low-resistance transmission mechanism comprises a central shaft, a tower footing and a hub main body, wherein the tower footing is sleeved on the central shaft, and a plurality of movable clamping jaws are formed on the tower footing; an inner gear ring is formed on the hub main body; the magnetic assembly comprises a first magnetic piece formed in the hub main body and a second magnetic piece connected to the tower footing; the first magnetic part comprises a plurality of first magnetic parts which are distributed annularly, a plurality of second magnetic parts are formed on the second magnetic part, and the second magnetic part can be rotatably connected relative to the tower footing within an angle range; in a riding state, the movable clamping jaws are released and meshed with the inner toothed ring on the hub main body to drive the hub main body to rotate, so that the transmission purpose is realized; under the non-riding state, first magnetic force spare drives second magnetic force spare antiport, and the activity jack catch breaks away from completely with interior ring gear under the effect of the second magnetic force portion that corresponds, reduces the contact of activity jack catch and interior ring gear, has reduced wearing and tearing each other, and has avoided the noise.
Description
Technical Field
The invention belongs to the technical field of wheel hubs, and particularly relates to a low-resistance transmission mechanism and a bicycle.
Background
In order to realize the power transmission between the tower footing and the hub main body of the bicycle, a one-way transmission mechanism is arranged between the tower footing and the hub main body, and the common one-way transmission mechanism uses a spring piece to provide reset power for a ratchet so as to enable the ratchet to perform overrunning clutch action with the hub shell.
When the transmission mechanism is in a state of not transmitting power, namely in a non-riding state, the spring piece is still in contact with the hub shell, so that great noise is generated when the spring piece jumps over one internal tooth, and simultaneously, because of the reason, when a bicycle is pushed to move forwards or is made to move forwards by inertia, resistance generated between the hub shell and a tower base is great, the abrasion between the spring piece and the internal tooth is increased, and the maintenance period is short; and produce great noise, use and feel relatively poor.
Disclosure of Invention
The invention aims to provide a low-resistance transmission mechanism and a bicycle, and aims to solve the problems that when the existing one-way transmission mechanism in the prior art does not transmit power, a pawl between a tower footing and a hub main body is always in contact with a ratchet wheel, the ratchet wheel and the ratchet wheel are seriously abraded, the maintenance period is short, the cost is high, the noise is high, and the like.
In order to realize the purpose of the invention, the invention adopts the following technical scheme to realize:
in one aspect, the present invention provides a low drag transmission mechanism comprising:
a middle shaft,
the tower footing is sleeved on the middle shaft, and a plurality of movable clamping jaws are formed on the tower footing along the circumferential direction of the tower footing;
the hub main body is sleeved on the middle shaft, and an inner gear ring is formed on the hub main body;
the magnetic assembly comprises a first magnetic member formed in the hub main body and a second magnetic member connected to the tower footing; the first magnetic member comprises a plurality of first magnetic parts which are distributed annularly, the second magnetic member is of an annular structure, a plurality of second magnetic parts are formed on the second magnetic member in a dispersing mode, and the second magnetic member can be rotatably connected relative to the tower footing within an angle range.
In some embodiments of the present application, a plurality of first limiting portions are formed on the tower base along a circumferential direction thereof, a second limiting portion adapted to each of the first limiting portions is formed on the second magnetic member, and the second limiting portion moves relative to the first limiting portion during rotation of the second magnetic member.
In some embodiments of the present application, the first position-limiting portion is a position-limiting groove structure, and the second position-limiting portion is a position-limiting post structure correspondingly disposed in the first position-limiting portion.
In some embodiments of the present application, the magnetic poles of the first magnetic force part and the second magnetic force part are homopolar.
In some embodiments of the present application, the number of the second magnetic force portions is equal to the number of the movable jaws, and the number of the first magnetic force portions is at least one time of the second magnetic force portions.
In some embodiments of the present application, the first magnetic member is also an annular structure, and is sleeved on the middle shaft and connected to the hub main body.
In some embodiments of the present application, an escape groove is formed on the tower footing, and one end of the movable jaw is rotatably connected in the escape groove.
In some embodiments of the present application, the movable jaw is metal;
in a first state, the positions of the second magnetic force parts correspond to the movable clamping jaws one by one, and under the action of the second magnetic force parts, the movable clamping jaws are retracted into the avoidance grooves;
in a second state, each second magnetic part on the second magnetic part rotates to a position between adjacent movable clamping jaws, and the movable clamping jaws extend out of the avoidance groove under the action of the second magnetic part.
In another aspect, the invention also provides a bicycle comprising a low drag transmission mechanism of the above-mentioned interest.
In some embodiments of the application, in a riding state, an initial rotation speed of the tower footing is greater than that of the hub main body, at this time, the second limiting portion rotates to the first end of the first limiting portion, the second magnetic portion rotates to correspond to and between the adjacent movable claws, an adsorption effect of the second magnetic portion on the movable claws disappears, the movable claws extend out of the avoiding groove and are clamped with the inner toothed ring to drive the hub main body to rotate;
under the state of not riding, the rotational speed of flower-drum main part is greater than the column foot, under this state, first magnetic force spare drives second magnetic force spare antiport extremely the second end of first spacing portion, second magnetic force portion rotates to corresponding the activity jack catch position will the activity jack catch adsorbs extremely avoid the inslot, with interior ring gear breaks away from.
Compared with the prior art, the invention has the advantages and positive effects that:
according to the low-resistance transmission mechanism and the bicycle, transmission is achieved between the tower footing and the hub main body through the magnetic assembly, and in a riding state, the movable clamping jaws are released to be meshed with the inner gear ring on the hub main body to drive the hub main body to rotate, so that the transmission purpose is achieved; under the non-riding state, first magnetic force spare drives second magnetic force spare antiport, and the activity jack catch breaks away from completely with interior ring gear under the effect of the second magnetic force portion that corresponds, reduces the contact of activity jack catch and interior ring gear, has reduced wearing and tearing each other, and has avoided the noise.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a perspective view of the external structure of one embodiment of the low drag transmission mechanism of the present invention;
FIG. 2 is a plan view of the external structure of one embodiment of the low resistance drive mechanism of the present invention;
FIG. 3 isbase:Sub>A sectional view A-A of FIG. 2;
FIG. 4 is a cross-sectional structural view of one embodiment of the low drag transmission mechanism;
FIG. 5 is a schematic view showing a connection state of an internal gear ring and movable claws;
FIG. 6 is a schematic view of a second magnetic member;
FIG. 7 is a schematic view of a first magnetic member;
FIG. 8 is a schematic view of a first connection location;
FIG. 9 is a schematic structural view of a movable jaw and an avoiding groove;
FIG. 10 is a schematic view showing the states of the second limiting member and the movable claws in the riding state;
fig. 11 is a schematic view of the states of the second limiting member and the movable pawl in the non-riding state.
In the figure, the position of the upper end of the main shaft,
100. a middle shaft;
200. a tower footing;
210. a movable jaw;
220. an avoidance groove;
230. a first limiting part; 231. a first end; 232. a second end;
300. a hub body;
310. an inner gear ring;
320. a bearing;
330. a first connection portion;
400. a magnetic assembly;
410. a first magnetic member; 411. a first magnetic force part; 412. a second connecting portion;
420. a second magnetic member; 421. a second magnetic force part; 422. a second limiting part.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" 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 indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; may be mechanically coupled, may be directly coupled, or may be indirectly coupled through an intermediary. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
Referring to fig. 1-4, the present application provides a low resistance transmission mechanism and a bicycle, wherein the low resistance transmission mechanism is installed at the front wheel or the rear wheel of the bicycle.
The low-resistance transmission mechanism comprises a middle shaft 100 which plays a role in rotating connection, a tower footing 200 sleeved on the middle shaft 100, a hub main body 300 and a magnetic assembly 400 used for connecting the tower footing 200 and the hub main body 300.
In order to ensure smooth rotation, bearings 320 are arranged between the tower footing 200 and the hub body 300 and the middle shaft 100.
An inner gear ring 310 is formed on the hub body 300, and a plurality of inner teeth are formed in the inner gear ring; the internal gear 310 may be directly machined into the hub body 300, or may be separately machined and then attached to the hub body 300.
One of the implementation modes is that an internal thread is formed on the hub main body 300, the internal gear ring 310 is separately processed, an external thread is formed on the external surface of the internal gear ring 310, and the internal gear ring 310 is connected to the hub main body 300 through a thread.
The tower footing 200 is formed with a plurality of movable jaws 210 along its circumference, and the movable jaws 210 can be engaged with the internal gear ring 310 to realize the transmission connection between the tower footing 200 and the hub body 300.
Specifically, a plurality of avoidance grooves 220 are formed on the peripheral side of the tower foundation 200, the movable claws 210 are respectively arranged in the corresponding avoidance grooves 220, one end of each movable claw 210 is connected to the tower foundation 200, and after one section of each movable claw 210 is stressed, the movable claws lie in the avoidance grooves 220.
Referring to fig. 5 to 7, the magnetic assembly 400 is installed between the hub main body 300 and the tower base 200, and includes a first magnetic member 410 formed in the hub main body 300 and a second magnetic member 420 coupled to the tower base 200.
The first magnetic member 410 and the second magnetic member 420 are both positive or negative, and generate repulsive force therebetween, so as to be respectively connected in contact with the hub main body 300 and the tower foundation 200 which are in contact with each other.
In addition to the axial interaction force generated between the first magnetic member 410 and the second magnetic member 420, during the rotation of one of the magnetic members, the other magnetic member is also acted on to generate a certain degree of rotation.
The first magnetic member 410 may be directly fixed into the hub main body 300, and the first magnetic member 410 may be coupled thereto by assembling for convenience of processing.
Referring to fig. 8, in an embodiment of the present application, a first connecting portion 330 is formed in the hub main body 300, a second connecting portion 412 is formed on the first magnetic member 410, the first connecting portion 330 is a slot structure formed in the hub main body 300 and extending in the axial direction, and the second connecting portion 412 is a connecting protrusion formed at one end of the first magnetic member 410.
In the installed state, the second connecting portion 412 is inserted into the first connecting portion 330, so as to connect the first magnetic member 410 and the hub body 300.
In addition to the above-described assembling manner, the first magnetic member 410 may be formed by directly fixing the plurality of first coupling parts 330 to the hub main body 300.
In order to control the movement of each movable jaw 210 by the second magnetic member 420, the second magnetic member 420 includes a plurality of second magnetic portions 421 distributed annularly, the second magnetic member 420 is of an annular structure, and the number of the second magnetic portions 421 corresponds to the number of the movable jaws 210 one by one, and the distances between the second magnetic portions 421 and the movable jaws 210 are the same.
In order to limit the rotation angle of the second magnetic member 420, a plurality of first position-limiting portions 230 are formed on the foundation 200 along the circumferential direction thereof, and second position-limiting portions 422 adapted to the first position-limiting portions 230 are formed on the second magnetic member 420.
During the rotation of the second magnetic member 420, the second position-limiting portion 422 moves relative to the first position-limiting portion 230.
Specifically, the first position-limiting portion 230 is a position-limiting groove structure formed on the end surface of the tower base 200 contacting the second magnetic member 420 and extending along the axial direction.
Referring to fig. 9, the second position-limiting portion 422 is a position-limiting column structure correspondingly disposed in the first position-limiting portion 230, and in the connected state, the second position-limiting portion 422 extends into the first position-limiting portion 230.
During the circumferential rotation of the second magnetic member 420, the second position-limiting portion 422 moves within the first position-limiting portion 230, and defines two moving ends of the first position-limiting portion 230 as the first end 231 and the second end 232, so that the second position-limiting portion 422 can only move between the first end 231 and the second end 232.
The number of the second magnetic force portions 421 corresponds to the number of the movable claws 210 one by one, and the number of the first magnetic force portions 411 is at least twice of that of the second magnetic force portions 421 and is uniformly distributed, so as to ensure the balance of the magnetic field.
The movable claws 210 are made of metal, each second magnetic part 421 of the second magnetic member 420 is located below the movable claw 210, and when the second magnetic parts 421 correspond to the movable claws 210 one by one, the movable claws 210 are attracted downwards into the escape grooves 220 under the action of magnetic force.
That is, during the angular rotation of the second magnetic member 420, the movable claws 210 lie in the escape grooves 220 or are separated from the escape grooves 220 by the adsorption of the second magnetic portion 421.
Referring to fig. 10 and 11, in particular, the movable jaw 210 has two working states: a first state and a second state.
In the first state, the second magnetic portion 421 rotates to the position of the second magnetic portion 421 corresponding to the movable claws 210 one by one, and under the action of the second magnetic portion 421, the movable claws 210 are retracted into the escape groove 220.
In the second state, the second magnetic force portions 421 of the second magnetic member 420 rotate to the positions between the adjacent movable claws 210, the attraction of the second magnetic force portions 421 to the movable claws 210 is lost, and the movable claws 210 are extended from the escape grooves 220 along with the movement of the second magnetic force portions 421.
The operation of the low resistance transmission mechanism will be described in detail below for different states of the bicycle:
in the riding state, the initial rotation speed of the tower footing 200 is greater than that of the hub body 300, at this time, the tower footing 200 rotates forward relative to the second limiting member, and the second limiting portion 422 on the second limiting member rotates relative to the first limiting portion 230 until the tower footing moves to the first end 231 of the first limiting portion 230.
At this time, the second magnetic force portion 421 rotates to a position corresponding to between the adjacent movable claws 210, and the movable claws 210 lock the rotation of the second magnetic force portion 421, extend out of the escape groove 220, and are engaged with the inner toothed ring 310 to drive the hub main body 300 to rotate.
In a non-riding state, the rotation speed of the hub body 300 is greater than that of the tower footing 200, and in this state, the first magnetic member 410 drives the second magnetic member 420 to rotate reversely to the second end 232 of the first limiting portion 230, and at this time, the second magnetic portion 421 rotates to a position corresponding to the movable jaw 210, so that the movable jaw 210 is adsorbed into the avoiding groove 220 and separated from the inner gear ring 310.
At this time, the movable jaws 210 are not in contact with the inner ring gear 310 any more, so that noise due to contact can be prevented, mutual abrasion can be reduced, and the working life can be prolonged.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed herein should be covered within the scope of the present invention, and therefore, the scope of the present invention should be determined by the scope of the appended claims.
Claims (10)
1. A low-drag transmission mechanism, comprising:
a middle shaft is arranged at the middle part of the main shaft,
the tower footing is sleeved on the middle shaft, and a plurality of movable clamping jaws are formed on the tower footing along the circumferential direction of the tower footing;
the hub main body is sleeved on the middle shaft, and an inner gear ring is formed on the hub main body;
the magnetic assembly comprises a first magnetic member formed in the hub main body and a second magnetic member connected to the tower footing; the first magnetic force piece comprises a plurality of first magnetic force parts which are distributed annularly; the second magnetic member is of an annular structure, a plurality of second magnetic parts are dispersedly formed on the second magnetic member, and the second magnetic member is rotatably connected relative to the tower footing within an angle range.
2. Low resistance transmission mechanism according to claim 1,
the tower base is provided with a plurality of first limiting parts along the circumferential direction, the second magnetic piece is provided with second limiting parts matched with the first limiting parts, and the second limiting parts move relative to the first limiting parts in the rotation process of the second magnetic piece.
3. Low resistance transmission mechanism according to claim 2,
the first limiting part is of a limiting groove structure, and the second limiting part is of a limiting column structure correspondingly arranged in the first limiting part.
4. Low resistance transmission mechanism according to claim 1,
the magnetic poles of the first magnetic part and the second magnetic part are homopolar.
5. Low resistance transmission mechanism according to claim 1,
the number of the second magnetic force parts is equal to that of the movable clamping jaws, and the number of the first magnetic force parts is at least one time of that of the second magnetic force parts.
6. Low resistance transmission mechanism according to claim 1,
the first magnetic member is also of an annular structure and is sleeved on the middle shaft to be connected with the hub main body.
7. Low resistance transmission mechanism according to claim 2,
an avoiding groove is formed in the tower footing, and one end of the movable clamping jaw is rotatably connected in the avoiding groove.
8. Low resistance transmission mechanism according to claim 7,
the movable clamping jaws are made of metal;
in a first state, the positions of the second magnetic force parts correspond to the movable clamping jaws one by one, and under the action of the second magnetic force parts, the movable clamping jaws are retracted into the avoidance grooves;
in a second state, each second magnetic part on the second magnetic part rotates to a position between the adjacent movable clamping jaws, and the movable clamping jaws extend out of the avoiding groove under the action of the second magnetic part.
9. A bicycle comprising a low-drag transmission mechanism as claimed in claim 8.
10. The bicycle of claim 9,
in a riding state, the initial rotating speed of the tower footing is greater than that of the hub main body, at the moment, the second limiting part rotates to the first end of the first limiting part, the second magnetic force part rotates to correspond to the position between the adjacent movable claws, the adsorption effect of the second magnetic force part on the movable claws disappears, and the movable claws extend out of the avoiding groove and are clamped with the inner toothed ring to drive the hub main body to rotate;
under the state of not riding, the rotational speed of flower-drum main part is greater than the column foot, under this state, first magnetic force spare drives second magnetic force spare antiport extremely the second end of first spacing portion, second magnetic force portion rotates to corresponding the activity jack catch position will the activity jack catch adsorbs extremely dodge the inslot, with interior ring gear breaks away from.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211280707.3A CN115465017A (en) | 2022-10-19 | 2022-10-19 | Low-resistance transmission mechanism and bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211280707.3A CN115465017A (en) | 2022-10-19 | 2022-10-19 | Low-resistance transmission mechanism and bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115465017A true CN115465017A (en) | 2022-12-13 |
Family
ID=84338024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211280707.3A Pending CN115465017A (en) | 2022-10-19 | 2022-10-19 | Low-resistance transmission mechanism and bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115465017A (en) |
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2022
- 2022-10-19 CN CN202211280707.3A patent/CN115465017A/en active Pending
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