CN115750619A - One-way clutch and two-wheeled vehicle - Google Patents
One-way clutch and two-wheeled vehicle Download PDFInfo
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- CN115750619A CN115750619A CN202211120432.7A CN202211120432A CN115750619A CN 115750619 A CN115750619 A CN 115750619A CN 202211120432 A CN202211120432 A CN 202211120432A CN 115750619 A CN115750619 A CN 115750619A
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- 230000005540 biological transmission Effects 0.000 abstract description 21
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 8
- 238000003825 pressing Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
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Abstract
The invention discloses a one-way clutch and a two-wheel vehicle, wherein the one-way clutch comprises a hub, a rotating shaft and a coil spring, the hub is provided with an inner hole, the inner wall of the hub is provided with a plurality of inner helical teeth which are circumferentially arranged, the rotating shaft penetrates through the inner hole, the coil spring is positioned in the inner hole, the inner end of the coil spring is fixedly connected to the rotating shaft, the coil spring is provided with outer helical teeth which are deviated from the outer side wall of the rotating shaft, when the rotating shaft rotates forwards, the outer helical teeth can be meshed with the inner helical teeth, and when the rotating shaft rotates backwards, the outer helical teeth are separated from the inner helical teeth. When the one-way clutch is used, when the rotating shaft rotates forwards, the outer helical teeth are meshed with the inner helical teeth, the coil spring expands, and the rotating shaft drives the hub through the coil spring to realize a transmission function; when the rotating shaft rotates reversely, the inner helical teeth push the coil spring to contract through the outer helical teeth, so that the outer helical teeth are separated from the inner helical teeth, and the idling function is realized. The coil spring is used for replacing a pawl and an O-shaped steel wire spring, the assembling steps are simplified, the service life of the coil spring is long, the reliability is high, the outer helical teeth and the inner helical teeth are meshed, the transmission is stable, and the idle stroke is reduced.
Description
Technical Field
The invention relates to the technical field of clutches, in particular to a one-way clutch and a two-wheel vehicle.
Background
In the related art, a two-wheeled vehicle generally uses a rear wheel as a driving wheel, such as a bicycle, an electric vehicle, etc., and the rear wheel has a one-way clutch to realize one-way transmission and prevent a fall in backing. At present, commonly used one way clutch comprises flower-drum and column foot, adopts ratchet and pawl cooperation transmission, provides the holding power for the pawl through O shaped steel silk spring for the pawl outwards expands under the normal state and towards the ratchet. The tower base rotates in the positive direction, and the ratchets are meshed with the pawls, so that the hub is driven to rotate; the tower footing rotates reversely, the ratchets are separated from the pawls, and the tower footing idles. However, the ratchet pawl structure has the following disadvantages: 1. the contact area of the pawl is small, the impact is large when the pawl is meshed, the transmission stability is poor, the idle stroke is large, and the impact force is large; 2. many parts, the equipment is loaded down with trivial details, and O type wire spring probably produces not hard up, the fatigue failure's problem moreover, and structural reliability is not high.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the one-way clutch provided by the invention has the advantages of simple and reliable structure, stable transmission, small impact and the like.
The invention also provides a two-wheel vehicle applying the one-way clutch.
The one-way clutch comprises a hub, a rotating shaft and a coil spring, wherein the hub is provided with an inner hole, the inner wall of the hub is provided with a plurality of inner helical teeth which are circumferentially arranged, the rotating shaft penetrates through the inner hole, the coil spring is positioned in the inner hole, the inner end of the coil spring is fixedly connected to the rotating shaft, the outer side wall of the coil spring, which is far away from the rotating shaft, is provided with outer helical teeth, when the rotating shaft rotates forwards, the outer helical teeth can be meshed with the inner helical teeth, and when the rotating shaft rotates backwards, the outer helical teeth are separated from the inner helical teeth.
The one-way clutch according to the embodiment of the first aspect of the invention has at least the following advantages: when the one-way clutch is used, when the rotating shaft rotates forwards, the outer helical teeth are meshed with the inner helical teeth, the coil spring is stressed to expand, and the rotating shaft drives the hub through the coil spring to realize a transmission function; when the rotating shaft rotates reversely, the inner helical teeth push the coil spring to contract through the outer helical teeth, so that the outer helical teeth are separated from the inner helical teeth, and an idling function is realized. The coil spring is used for replacing a pawl and an O-shaped steel wire spring, the assembling steps are simplified, the coil spring is long in service life, not prone to failure and high in reliability, the outer helical teeth and the inner helical teeth are meshed, transmission is more stable, and idling stroke is reduced.
According to some embodiments of the first aspect of the present invention, adjacent ones of the inner helical teeth form a gullet therebetween, and at least one of the outer helical teeth adjacent to the outer end of the coil spring remains protruding into the gullet.
According to some embodiments of the first aspect of the present invention, a width dimension of the outer helical teeth is larger than a width dimension of the inner helical teeth in an axial direction of the rotary shaft.
According to some embodiments of the first aspect of the present invention, the inner helical teeth have an engagement surface for engaging with the outer helical teeth, the engagement surface being arranged in a radial direction of the hub.
According to some embodiments of the first aspect of the present invention, the coil spring has a thickness of 2mm to 6mm in a radial direction of the rotation shaft.
According to some embodiments of the first aspect of the present invention, the number of the outer helical teeth is 5 to 120, and two adjacent outer helical teeth meet.
According to some embodiments of the first aspect of the present invention, the plurality of outer helical teeth occupy an angle of 180 ° to 270 ° in a circumferential direction of the rotating shaft.
According to some embodiments of the first aspect of the present invention, the addendum of the externally helical tooth is provided with a chamfer.
According to some embodiments of the first aspect of the present invention, the end surface of the hub is provided with a collar surrounding the inner helical teeth.
According to some embodiments of the first aspect of the present invention, the inner end of the coil spring is provided with a through hole, and a fastening member is inserted into the through hole and fixed to the rotating shaft.
According to some embodiments of the first aspect of the present invention, the shaft and the coil spring are a unitary structural piece.
A two-wheeled vehicle according to an embodiment of the second aspect of the invention includes the one-way clutch as described in the embodiment of the first aspect.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is an exploded schematic view of a one-way clutch in accordance with an embodiment of a first aspect of the present invention;
FIG. 2 is a principal perspective exploded schematic view of a one-way clutch in accordance with an embodiment of the first aspect of the present invention;
FIG. 3 is a first schematic view illustrating a state of forward rotation of the rotating shaft according to the first embodiment of the present invention;
FIG. 4 is a second schematic view illustrating a forward rotation state of the rotating shaft according to the first embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating a state where the rotation shaft is reversely rotated in the first embodiment of the present invention;
FIG. 6 is an enlarged view of a portion of FIG. 5 at A;
fig. 7 is an exploded view of the shaft and coil spring in the first embodiment of the present invention.
The reference numbers are as follows:
the hub 100, the inner hole 101, the tooth grooves 102, the inner helical teeth 110, the meshing surface 111, the inclined pressing surface 112 and the retainer ring 120;
a rotating shaft 200;
a coil spring 300, external helical teeth 310, a fastener 320.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings only for the convenience of description of the present invention and simplification of the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.
In the description of the present invention, unless otherwise specifically limited, terms such as set, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the specific contents of the technical solutions.
In the related art, since a two-wheeled vehicle cannot maintain stable support by itself because of having only two wheels, a one-way clutch is generally provided at a rear wheel (driving wheel) to perform functions of forward transmission and reverse idle rotation.
A common one-way clutch is composed of a hub and a tower footing, the structure transmission of ratchet and pawl combination is adopted, supporting force is provided for the pawl through an O-shaped steel wire spring, the pawl is kept in an outward expansion state under a normal state, and the expanded pawl faces the ratchet and abuts against the ratchet. When the tower base rotates forward, the pawl is meshed with the ratchet, so that the hub is driven to rotate; when the tower footing rotates reversely, the ratchets push the pawls to compress the O-shaped steel wire springs, so that the ratchets are separated from the pawls, and the tower footing idles. The ratchet and pawl arrangement, however, suffers from the following disadvantages: 1. the number of the pawls is small, the contact area is small, the impact is large when the pawls are meshed, the transmission stability is poor, the idle stroke is large, and the impact force is large; 2. the number of parts is large, the assembly is complicated, the O-shaped steel wire spring is likely to generate the problems of looseness and fatigue failure, and the structural reliability is not high; 3. in the reverse rotation of the tower footing, the O-shaped steel wire spring pushes the pawl to expand, the pawl continuously collides with the ratchet, and large noise is generated.
Therefore, the embodiment of the first aspect of the present invention provides a one-way clutch applied to a two-wheel vehicle, which can simplify the assembly steps, improve the transmission stability, reduce the idle stroke, and reduce the impact force of engagement and idle noise.
Referring to fig. 1 to 6, a one-way clutch according to an embodiment of a first aspect of the present invention includes a hub 100, a rotating shaft 200, and a coil spring 300, where the hub 100 is a housing of the one-way clutch, and spokes are usually mounted on the hub 100 to manufacture a hub, the hub 100 has an inner hole 101, the inner hole 101 penetrates through the hub 100 in an axial direction of the hub 100, and the hub 100 is provided with a plurality of inner helical teeth 110 circumferentially arranged on an inner wall of the inner hole 101, and the plurality of inner helical teeth 110 are usually uniformly distributed in a circumferential direction of the hub 100, so that the plurality of inner helical teeth 110 are uniformly distributed, and stress on each part of the hub 100 is more uniform.
It can be understood that the rotating shaft 200 axially penetrates through the inner hole 101, the rotating shaft 200 is rotationally connected with the hub 100, that is, the rotating shaft 200 can rotate freely relative to the hub 100, a bearing (not shown in the figure) is usually installed in the inner hole 101 of the hub 100, an outer ring of the bearing is fixed on an inner wall of the inner hole 101, and the rotating shaft 200 is fixed on an inner ring of the bearing, so that the bearing is used to provide rotational support, and the requirement of the rotating shaft 200 for rotation is met. It should be understood that the type of the bearing may be determined according to the stress state of the rotating shaft 200, and when the rotating shaft 200 only bears the radial force, a ball bearing may be selected, and when the rotating shaft 200 simultaneously bears the radial force and the axial force, a tapered roller bearing may be selected, a combination of two tapered roller bearings may be selected, or a combination of a ball bearing and a tapered roller bearing may be selected.
It can be understood that the coil spring 300 is also arranged in the inner hole 101, the inner end of the coil spring 300 is fixedly connected with the rotating shaft 200, the outer end of the coil spring 300 is enlarged along the radial direction of the rotating shaft 200, the outer side wall of the coil spring 300, which is far away from the rotating shaft 200, is provided with an outer helical tooth 310, the outer helical tooth 310 is matched with the inner helical tooth 110 in shape, the outer helical tooth 310 and the inner helical tooth 110 can be meshed, when the rotating shaft 200 rotates forwards, the outer helical tooth 310 and the inner helical tooth 110 are meshed, and when the rotating shaft 200 rotates backwards, the outer helical tooth 310 and the inner helical tooth 110 are separated. It should be understood that the forward rotation and the reverse rotation of the rotating shaft 200 are only used for distinguishing states, and the specific direction is not limited. Moreover, the hub 100 can also be a driving component, when the hub 100 rotates forward, the outer helical teeth 310 are engaged with the inner helical teeth 110, and when the hub 100 rotates backward, the outer helical teeth 310 are disengaged from the inner helical teeth 110, which can also meet the use requirement of the one-way clutch.
The use process of the one-way clutch in the two-wheel vehicle is as follows: when the two-wheeled vehicle needs to move forwards, the rotating shaft 200 rotates forwards, referring to fig. 3 and 4, at this time, the outer helical teeth 310 on the coil spring 300 are meshed with the inner helical teeth 110 of the hub 100, and the coil spring 300 is stressed and expands outwards during the process, so that the outer helical teeth 310 are tightly meshed with the inner helical teeth 110, and the coil spring 300 can transmit power, so that the rotating shaft 200 drives the hub 100 through the coil spring 300, a transmission function is realized, and the two-wheeled vehicle realizes the forward movement; when the driving part of the two-wheeled vehicle rotates reversely, the rotating shaft 200 rotates reversely, referring to fig. 5, at this time, the inner helical teeth 110 push the coil spring 300 to contract through the outer helical teeth 310, so that the outer helical teeth 310 are separated from the inner helical teeth 110, the idling function of the rotating shaft 200 is realized, the hub 100 does not rotate along with the rotating shaft 200, and the two-wheeled vehicle is prevented from backing and falling down.
The one-way clutch utilizes the coil spring 300 as a component for transmitting power, and the coil spring 300 replaces a pawl and an O-shaped steel wire spring, so that the assembly steps of the one-way clutch are simplified, and the production cost is reduced; the coil spring 300 is long in service life, not easy to lose efficacy and high in reliability; the structure that a plurality of outer helical teeth 310 and a plurality of inner helical teeth 110 are meshed can be adopted, so that the transmission stability is improved, the impact force is reduced greatly, and the idle running stroke is reduced.
It is understood that the coil spring is also called a spiral spring, and is a flat spiral spring made of spring steel, which can continuously provide a large restoring force in a narrow space. In the one-way clutch, the self-resetting capability of the coil spring 300 is utilized to enable the coil spring 300 to keep a normal state, the condition that the outer helical teeth 310 can be meshed with the inner helical teeth 110 is met, and when the rotating shaft 200 rotates forwards, the expansion capability of the coil spring 300 is utilized to enable the outer helical teeth 310 to be meshed with the inner helical teeth 110, so that power can be transmitted; when the shaft 200 is rotated reversely, the outer helical teeth 310 can be disengaged from the inner helical teeth 110 by using the contraction capability of the coil spring 300.
Referring to fig. 3 and 4, it can be understood that a plurality of the inner helical teeth 110 are closely arranged, a tooth slot 102 is formed between two adjacent inner helical teeth 110, when the outer helical teeth 310 are engaged with the inner helical teeth 110, the outer helical teeth 310 are located in the tooth slot 102, in order to ensure that the outer helical teeth 310 can be engaged with the inner helical teeth 110 when the rotating shaft 200 rotates forward, at least one outer helical tooth 310 close to the outer end of the coil spring 300 is kept protruding into the tooth slot 102, that is, at least one outer helical tooth 310 of the coil spring 300 is kept protruding into the tooth slot 102 in the normal state. When the rotating shaft 200 rotates in the forward direction, the inner helical teeth 110 contact the outer helical teeth 310 extending into the slots 102, and then push the coil spring 300 to deform and expand outward, so that more outer helical teeth 310 are engaged with the inner helical teeth 110, which is advantageous for power transmission. Moreover, the deformation of the coil spring 300 generates a reaction force, the contact between the coil spring 300 and the hub 100 can be buffered by using the reaction force, the impact force is reduced, the service life of the one-way clutch is prolonged, and the impact is absorbed by using the deformation and the reaction force of the coil spring 300 in the process of accelerating or braking the two-wheel vehicle, so that the collision and the abrasion are reduced.
It should be understood that in the one-way clutch, it is preferable to keep the four outer helical teeth 310 in the tooth spaces 102, and when the rotating shaft 200 rotates forward, the four outer helical teeth 310 and the inner helical teeth 110 are quickly brought into engagement, so that slipping is prevented, and transmission is smoother.
It can be understood that, in the axial direction of the rotating shaft 200, the width dimension of the outer helical teeth 310 is greater than the width dimension of the inner helical teeth 110, and both ends of the width of the outer helical teeth 310 are located outside the inner helical teeth 110, so that when the outer helical teeth 310 are engaged with the inner helical teeth 110, the outer helical teeth 310 can completely abut against the inner helical teeth 110, and have a larger contact area, which is beneficial for transmitting power. Moreover, the width dimension of the coil spring 300 is consistent with the width dimension of the outer helical teeth 310, and the coil spring 300 has a larger width dimension, which is beneficial to improving the structural strength of the coil spring 300 and transmitting power. In the assembling process, the precision requirement of the axial position of the coil spring 300 along the rotating shaft 200 is low, the assembling is convenient, and the manufacturing cost is reduced.
Referring to fig. 1 to 4, it can be understood that the inner helical teeth 110 include the engaging surface 111 and the helical pressing surface 112, the engaging surface 111 is used for matching with the outer helical teeth 310 to achieve engagement, and the engaging surface 111 is arranged along the radial direction of the hub 100, when the outer helical teeth 310 are engaged with the inner helical teeth 110, the acting force between the outer helical teeth 310 and the inner helical teeth 110 is perpendicular to the engaging surface 111, which is beneficial to transmitting power, and the transmission is smoother.
Referring to fig. 5 and 6, it can be understood that when the rotation shaft 200 is reversely rotated, the slanted pressing surfaces 112 can contact the outer slanted teeth 310, thereby pushing the coil spring 300 to contract, so that the outer slanted teeth 310 are disengaged from the inner slanted teeth 110, and a lost motion function is achieved. The slanted surfaces 112 and the engaging surfaces 111 form an angle, and the greater the angle, the easier the disengagement of the outer slanted teeth 310 and the inner slanted teeth 110 is, but the area of the engaging surfaces 111 is also reduced, so the angle may be set to 50 ° to 70 °, with 60 ° being a preferred option, and a better balance between the ease of disengagement and the power transmission is achieved.
It can be understood that, in the radial direction of the rotating shaft 200, the thickness of the coil spring 300 is 2mm to 6mm, and the thickness of the coil spring 300 can be selected to be 2mm, 3mm, 4mm, 5mm or 6mm, so that the coil spring 300 has sufficient structural strength, can bear torsion, and ensures that the one-way clutch can operate stably. Meanwhile, the coil spring 300 has a sufficient thickness for processing the outer helical teeth 310, so that the outer helical teeth 310 have a certain thickness dimension, the risk of breakage of the outer helical teeth 310 is reduced, and the use reliability is improved.
It can be understood that a plurality of outer helical teeth 310 are provided on the outer side wall of the coil spring 300, the number of the outer helical teeth 310 is 5 to 120, for example, the coil spring 300 may be provided with 5 outer helical teeth 310, 10 outer helical teeth 310, 13 outer helical teeth 310, 20 outer helical teeth 310 or 120 outer helical teeth 310, and the number of the outer helical teeth 310 is set according to the actual use requirement of the one-way clutch. It should be understood that the larger the number of the outer helical teeth 310, the larger the volume of the coil spring 300, to provide enough space to accommodate the outer helical teeth 310, and thus the installation space of the one-way clutch is also one of the factors limiting the number of the outer helical teeth 310. Two adjacent outer helical teeth 310 are connected, and a plurality of outer helical teeth 310 are closely arranged, so that when the rotating shaft 200 rotates reversely, the impact can be reduced and the noise can be reduced in the process that the outer helical teeth 310 are separated from the inner helical teeth 110.
It is understood that the plurality of outer helical teeth 310 occupy an angle of 180 ° to 270 ° in the circumferential direction of the rotation shaft 200, wherein the angle of 253 ° is preferred. When the rotating shaft 200 rotates forwards, the angle occupied by the meshing area of the outer helical teeth 310 and the inner helical teeth 110 exceeds 100 degrees, even exceeds 180 degrees, the power which can be transmitted is large, and the application range is widened. It should be understood that the plurality of outer helical teeth 310 are not necessarily all engaged with the inner helical teeth 110, and the non-engaged outer helical teeth 310 serve as a safety guarantee, and in case of a crack of the engaged outer helical teeth 310, the non-engaged outer helical teeth 310 can enter into an engaged state, guaranteeing contact and power transmission between the coil spring 300 and the hub 100.
Referring to fig. 5 and 6, it can be understood that a chamfer is provided at the tooth top of the external helical tooth 310, and the chamfer may be a flat surface or a circular arc surface. By arranging the chamfer, when the rotating shaft 200 rotates reversely, the collision between the outer helical teeth 310 and the helical pressing surface 112 is improved, the stroke of the helical pressing surface 112 pushing the coil spring 300 to contract is reduced, the rebound force of the coil spring 300 is reduced, and the noise generated by collision can be reduced. It should be understood that the tooth tops of each of the skewed teeth 310 may be chamfered, or the tooth tops of some of the skewed teeth 310 may be chamfered; the size and shape of each chamfer can be the same or different.
Referring to fig. 1, it can be understood that the end surface of the hub 100 is provided with a retainer ring 120, the retainer ring 120 is annular, and the retainer ring 120 surrounds the inner helical teeth 110 and the coil spring 300, and in the one-way clutch, the retainer ring 120 can play a role of protection, and prevent other components from colliding against the outer helical teeth 310 and the inner helical teeth 110 and damaging due to collision during the process of carrying the one-way clutch and assembling the one-way clutch to a two-wheeled vehicle.
Referring to fig. 7, it can be understood that the inner end of the coil spring 300 is provided with a through hole (not shown) through which a fastener 320 is inserted, and the fastener 320 is fixed to the rotation shaft 200, thereby fixing the inner end of the coil spring 300 to the rotation shaft 200. The fastening member 320 may be a bolt, the rotating shaft 200 is provided with a threaded hole matching the bolt, and the bolt passes through the through hole and is screwed into the threaded hole, so as to fix the coil spring 300 and the rotating shaft 200. The fastener 320 may also be a rivet, and the coil spring 300 can be fixed to the rotating shaft 200.
It will be appreciated that the shaft 200 and the coil spring 300 are a unitary structure, such as the shaft 200 and the coil spring 300 are cast as one piece and then machined to size and shape the outer helical teeth 310. It is also possible to weld the inner end of the coil spring 300 to the rotation shaft 200 and fix the rotation shaft 200 and the coil spring 300 as an integrated structure.
The two-wheeled vehicle provided by the embodiment of the second aspect of the invention comprises the one-way clutch of the embodiment of the first aspect, and the two-wheeled vehicle comprises, but is not limited to, a bicycle, an electric bicycle and an electric motorcycle. Generally, a one-way clutch is installed on a rear wheel of a two-wheeled vehicle, the one-way clutch includes a hub 100 and a rotating shaft 200, and a bicycle is taken as an example, the rotating shaft 200 is used as a shaft of the rear wheel, the hub 100 is a part of a hub, a user drives the rotating shaft 200 through a pedal and a chain, when the bicycle runs forwards, the one-way clutch can transmit power, and the rear wheel rotates to realize the forward running.
The one-way clutch further comprises a coil spring 300, the hub 100 is provided with an inner hole 101, the inner hole 101 penetrates through the hub 100 along the axial direction of the hub 100, the hub 100 is provided with a plurality of inner helical teeth 110 arranged circumferentially on the inner wall of the inner hole 101, and the plurality of inner helical teeth 110 are generally uniformly distributed along the circumferential direction of the hub 100, so that the plurality of inner helical teeth 110 are distributed uniformly, and the stress on each part of the hub 100 is more balanced.
It can be understood that the rotating shaft 200 axially penetrates through the inner hole 101, the rotating shaft 200 is rotatably connected with the hub 100, that is, the rotating shaft 200 can freely rotate relative to the hub 100, a bearing (not shown in the drawings) is usually installed in the inner hole 101 of the hub 100, an outer ring of the bearing is fixed on an inner wall of the inner hole 101, the rotating shaft 200 is fixed on an inner ring of the bearing, and the bearing is used for providing a rotating support, so as to meet a requirement of rotation of the rotating shaft 200. It should be understood that the type of the bearing may be determined according to the stress state of the rotating shaft 200, when the rotating shaft 200 only bears a radial force, a ball bearing may be used, when the rotating shaft 200 simultaneously bears a radial force and an axial force, a tapered roller bearing may be used, a combination of two tapered roller bearings may be used, or a combination of a ball bearing and a tapered roller bearing may be used.
It can be understood that the coil spring 300 is also arranged in the inner hole 101, the inner end of the coil spring 300 is fixedly connected to the rotating shaft 200, the outer end of the coil spring 300 is enlarged along the radial direction of the rotating shaft 200, the outer side wall of the coil spring 300 facing away from the rotating shaft 200 is provided with an outer helical tooth 310, the outer helical tooth 310 is matched with the inner helical tooth 110 in shape, the outer helical tooth 310 and the inner helical tooth 110 can be meshed, when the rotating shaft 200 rotates forwards, the outer helical tooth 310 and the inner helical tooth 110 are meshed, and when the rotating shaft 200 rotates backwards, the outer helical tooth 310 and the inner helical tooth 110 are separated. It should be understood that the forward rotation and the reverse rotation of the rotating shaft 200 are only used for distinguishing states, and the specific direction is not limited. Moreover, the hub 100 may also be a driving component, when the hub 100 rotates forward, the outer helical teeth 310 are engaged with the inner helical teeth 110, and when the hub 100 rotates backward, the outer helical teeth 310 are disengaged from the inner helical teeth 110, which may also meet the use requirements of the one-way clutch.
The use process of the one-way clutch in the two-wheel vehicle is as follows: when the two-wheeled vehicle needs to move forwards, the rotating shaft 200 rotates forwards, referring to fig. 3 and 4, at this time, the outer helical teeth 310 on the coil spring 300 are meshed with the inner helical teeth 110 of the hub 100, and the coil spring 300 is stressed and expands outwards during the process, so that the outer helical teeth 310 are tightly meshed with the inner helical teeth 110, and the coil spring 300 can transmit power, so that the rotating shaft 200 drives the hub 100 through the coil spring 300, a transmission function is realized, and the two-wheeled vehicle realizes the forward movement; when the driving part (pedal) of the two-wheeled vehicle is reversed, the rotating shaft 200 is reversed, referring to fig. 5, at this time, the inner helical teeth 110 push the coil spring 300 to shrink through the outer helical teeth 310, so that the outer helical teeth 310 are separated from the inner helical teeth 110, the idling function of the rotating shaft 200 is realized, the hub 100 does not rotate along with the rotating shaft 200, and the two-wheeled vehicle is prevented from backing and falling down.
The one-way clutch utilizes the coil spring 300 as a component for transmitting power, and the coil spring 300 replaces a pawl and an O-shaped steel wire spring, so that the assembly steps of the one-way clutch are simplified, and the production cost is reduced; the coil spring 300 is long in service life, not easy to lose efficacy and high in reliability; the structure of meshing the plurality of outer helical teeth 310 with the plurality of inner helical teeth 110 can be adopted, so that the transmission stability is improved, the impact force is reduced greatly, and the idle running stroke is reduced.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (12)
1. A one-way clutch, comprising:
the hub is provided with an inner hole, and the inner wall of the hub is provided with a plurality of inner helical teeth which are circumferentially arranged;
the rotating shaft penetrates through the inner hole;
the spring is located in the inner hole, the inner end of the spring is fixedly connected to the rotating shaft, outer oblique teeth are arranged on the outer side wall of the spring, which is far away from the rotating shaft, when the rotating shaft rotates forwards, the outer oblique teeth can be meshed with the inner oblique teeth, and when the rotating shaft rotates backwards, the outer oblique teeth are separated from the inner oblique teeth.
2. The one-way clutch according to claim 1, wherein adjacent two of said inner helical teeth define a spline therebetween, and at least one of said outer helical teeth adjacent to an outer end of said wrap spring remains extended into said spline.
3. The one-way clutch according to claim 1, wherein a width dimension of the outer helical teeth is larger than a width dimension of the inner helical teeth in an axial direction of the rotating shaft.
4. The one-way clutch according to claim 1 or 3, wherein the inner helical teeth have an engagement surface for engaging with the outer helical teeth, the engagement surface being arranged in a radial direction of the hub.
5. The one-way clutch according to claim 1, wherein the coil spring has a thickness of 2mm to 6mm in a radial direction of the rotating shaft.
6. The one-way clutch according to claim 1, wherein the number of the outer helical teeth is 5 to 120, and adjacent two of the outer helical teeth meet.
7. The one-way clutch according to claim 6, wherein a plurality of the outer helical teeth occupy an angle of 180 ° to 270 ° in a circumferential direction of the rotating shaft.
8. The one-way clutch according to claim 1, wherein the crests of the skewed teeth are provided with chamfers.
9. The one-way clutch according to claim 1, wherein an end face of the hub is provided with a retainer ring that surrounds the inner helical teeth.
10. The one-way clutch according to claim 1, wherein the inner end of the coil spring is provided with a through hole, and a fastener is penetrated in the through hole and fixed on the rotating shaft.
11. The one-way clutch according to claim 1, wherein the shaft and the coil spring are an integral structural member.
12. Two-wheeled vehicle, characterized in that it comprises a one-way clutch according to any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211120432.7A CN115750619A (en) | 2022-09-15 | 2022-09-15 | One-way clutch and two-wheeled vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211120432.7A CN115750619A (en) | 2022-09-15 | 2022-09-15 | One-way clutch and two-wheeled vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115750619A true CN115750619A (en) | 2023-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211120432.7A Pending CN115750619A (en) | 2022-09-15 | 2022-09-15 | One-way clutch and two-wheeled vehicle |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039089A (en) * | 1988-07-05 | 1990-01-24 | 斯蒂芬·卡普 | Overrunning clutch |
| JP2005321045A (en) * | 2004-05-10 | 2005-11-17 | Ntn Corp | Spring clutch |
| US20070284210A1 (en) * | 2006-06-13 | 2007-12-13 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Frictionally guided radial one-way clutch |
| CN204712784U (en) * | 2015-06-09 | 2015-10-21 | 苏州奥然日用品有限公司 | A kind of bicycle hub ratchet structure |
| CN111749992A (en) * | 2019-03-28 | 2020-10-09 | 舍弗勒技术股份两合公司 | Clutch and driven plate assembly |
| CN112078712A (en) * | 2020-10-26 | 2020-12-15 | 周大海 | Hybrid range extender and reverse clutch separation and energy recovery mechanism of electric vehicle |
| CN113531002A (en) * | 2021-06-28 | 2021-10-22 | 厦门森科艾图智能科技有限公司 | Rotary control tightness clutch |
-
2022
- 2022-09-15 CN CN202211120432.7A patent/CN115750619A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039089A (en) * | 1988-07-05 | 1990-01-24 | 斯蒂芬·卡普 | Overrunning clutch |
| JP2005321045A (en) * | 2004-05-10 | 2005-11-17 | Ntn Corp | Spring clutch |
| US20070284210A1 (en) * | 2006-06-13 | 2007-12-13 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Frictionally guided radial one-way clutch |
| CN204712784U (en) * | 2015-06-09 | 2015-10-21 | 苏州奥然日用品有限公司 | A kind of bicycle hub ratchet structure |
| CN111749992A (en) * | 2019-03-28 | 2020-10-09 | 舍弗勒技术股份两合公司 | Clutch and driven plate assembly |
| CN112078712A (en) * | 2020-10-26 | 2020-12-15 | 周大海 | Hybrid range extender and reverse clutch separation and energy recovery mechanism of electric vehicle |
| CN113531002A (en) * | 2021-06-28 | 2021-10-22 | 厦门森科艾图智能科技有限公司 | Rotary control tightness clutch |
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