TWI664098B - Wheel - Google Patents

Abstract

A hub includes a mandrel, two mounting units rotatably mounted on the mandrel, and a clutch mechanism. The clutch mechanism includes a clutch gear and a clutch unit respectively mounted on the mounting unit. The clutch unit has at least one first clutch seat and at least one second clutch seat. When the clutch mechanism is located at a first engagement position, the clutch gear is engaged with the first clutch seat but is engaged with the second clutch. The seat is staggered, and when the clutch mechanism is switched to a second engagement position, the clutch tooth plate is merged with the second clutch seat and staggered from the first clutch seat. In the aforementioned structure, the clutch gear can be quickly engaged with one of the first clutch seat and the second clutch seat in the process that the clutch mechanism is about to engage, thereby reducing the engagement time.

Description

Wheel

The present invention relates to a wheel hub suitable for mounting on, for example, a bicycle or a similar vehicle, and more particularly to a wheel hub having a clutch function.

A typical bicycle generally includes a frame, a set of pedals mounted on the frame, a rear wheel, a hub on which the rear wheel is mounted on the frame, and a rotary power transmitting the pedal to the hub. The transmission mechanism includes a front sprocket set linked to the pedal, a rear sprocket set mounted on the hub, and a chain connecting the front sprocket set and the rear sprocket set. In order to allow the hub to be driven forward and reverse, the hub has a clutch mechanism that has two clutch teeth that can be engaged and separated, and each clutch tooth has a number of centers around it. Clamping of the axis. When the clutch mechanism is in an engaging position, the engaging teeth of the clutch tooth discs are engaged. At this time, the power of the pedal can drive the rear wheel to rotate forward through the transmission mechanism and the hub. When the pedal is driven to rotate in the reverse direction, the clutch gear disc will slip off and become idle.

It is known that the engagement depth of the clutch teeth and the number of teeth of each clutch teeth It is related to the quantity, that is, when the number of teeth of the clutch gear is small, the engagement is relatively deep, but the distance between each of the teeth is relatively long. Snap time. In order to shorten the engaging time, although the distance between the engaging teeth can be shortened, that is, the number of teeth of the engaging teeth is increased, but an increase in the number of teeth will cause a problem of insufficient engaging depth. Therefore, how to reduce the engagement time of the switching position while taking into account the engagement depth is a subject to be improved in the design of conventional wheels.

It is therefore an object of the present invention to provide a hub that can improve at least one of the disadvantages of the prior art.

Therefore, the hub of the present invention is used for detachably linking a first object and a second object, and includes: a mandrel having a central axis, a first mounting unit, a second mounting unit, and a clutch mechanism The first mounting unit includes a first mounting base rotatably mounted on the mandrel around the central axis, and the second mounting unit includes a second mounting base rotatably mounted on the mandrel around the central axis. A mounting seat, the clutch mechanism comprising a clutch toothed disc coupled with the first mounting seat, and a clutch unit mounted on the second mounting seat, the clutch toothed disc having a plurality of clamping slots around the central axis, The clutch unit has a linkage seat interlocking with the second mounting seat, and at least one first clutch assembly and at least one second clutch assembly installed on the linkage seat. The first clutch assembly has a first clutch. The first clutch seat has a plurality of first clamping teeth around the central axis, the second clutch assembly has a second clutch seat, and the second clutch component has a plurality of second clamping teeth around the central axis. .

When the clutch mechanism is in a first engaging position, the first engaging teeth are respectively engaged in the corresponding engaging slots, and the second engaging teeth are respectively staggered from the corresponding engaging slots. When the clutch mechanism is located at a second engaging position, the second engaging teeth are respectively engaged in the corresponding slot, and the first engaging teeth are staggered from the corresponding engaging slot.

The effect of the present invention is that the cooperation of the foregoing structure allows the clutch gear to be quickly engaged with one of the first clutch seat and the second clutch seat in the process that the clutch mechanism is about to engage. This achieves a reduction in engagement time while taking into account the engagement depth.

11‧‧‧ the first object

12‧‧‧ second object

2‧‧‧ mandrel

20‧‧‧ center axis

21‧‧‧ shaft wall

3‧‧‧First installation unit

511‧‧‧card slot

512‧‧‧ against the face

513‧‧‧ oblique face

514‧‧‧ Engagement arc angle

52‧‧‧Linked seat

521‧‧‧face

31‧‧‧First Mount

310‧‧‧channel

311‧‧‧ ring wall

312‧‧‧The first protruding ring

313‧‧‧Second protruding ring

314‧‧‧first thread

315‧‧‧second thread

32‧‧‧first casing

33‧‧‧First bearing

34‧‧‧Second bearing

35‧‧‧Fixed

36‧‧‧The first assembly tank

4‧‧‧Second installation unit

41‧‧‧Second Mount

411‧‧‧Assembly thread

412‧‧‧Slot bottom surface

42‧‧‧Second Casing

43‧‧‧Erection bearing

44‧‧‧Second assembly slot

5‧‧‧ Clutch

50‧‧‧ clutch unit

51‧‧‧ Clutch Gear

522‧‧‧center hole

523‧‧‧First assembly hole

523’‧‧‧Second assembly hole

53‧‧‧Gasket

54‧‧‧The first clutch assembly

54’‧‧‧Second clutch assembly

541‧‧‧The first clutch seat

541’‧‧‧Second Clutch Block

542‧‧‧First elastic member

542’‧‧‧second elastic

543‧‧‧First tooth

543’‧‧‧Second clamping tooth

544‧‧‧First engagement surface

544’‧‧‧ the second engagement surface

545‧‧‧First slip surface

545’‧‧‧ second slip surface

W1‧‧‧hole arc angle

W2‧‧‧First interval arc angle

W3‧‧‧Second interval arc angle

α‧‧‧First offset angle

β‧‧‧second offset angle

Other features and effects of the present invention will be clearly presented in the embodiment with reference to the drawings, wherein: FIG. 1 is a combined cross-sectional view of a first embodiment of a wheel hub of the present invention, and simultaneously illustrates the wheel hub and a first object And a second object; FIG. 2 is an exploded perspective view of the first embodiment, illustrating the relative relationship between a clutch mechanism of the hub and a mandrel; 3 is an exploded plan view of the first embodiment, illustrating the clutch mechanism; FIG. 4 is an incomplete combined sectional view of the first embodiment, the clutch mechanism is in a first engagement position; FIG. 5 is A schematic side view of the first embodiment, the clutch mechanism is also located at the first engagement position; FIG. 6 is a view similar to FIG. 5, and the clutch mechanism is located at a second engagement position; FIG. An exploded perspective view of a second embodiment of the inventive hub, illustrating the clutch mechanism separately; FIG. 8 is a schematic side view of the second embodiment, the clutch mechanism is in the first engagement position; and FIG. 9 is A view similar to FIG. 8, with the clutch mechanism in the second engaging position.

Referring to Figs. 1, 2, and 3, a first embodiment of a wheel hub according to the present invention is adapted to transmit the rotational power of a first object 11 to a second object 12. In this embodiment, the first object 11 schematically has a plurality of For a sprocket set of a sprocket, the second object 12 indicates a plurality of spoke wires that can be connected to a wheel. The hub includes a mandrel 2, a first mounting unit 3, a second mounting unit 4, and a first mounting unit. The rotational power of the mounting unit 3 is transmitted to the clutch mechanism 5 of the second mounting unit 4. The mandrel 2 includes a shaft wall 21 disposed around a central axis 20.

The first mounting unit 3 includes a first mounting base 31 coupled with the first object 11. The first mounting base 31 has a ring wall 311 surrounding the central axis 20 and defining a channel 310. A first protruding ring 312 and a second protruding ring 313 protruding from the annular wall 311 toward the channel 310. The first protruding ring 312 and the second protruding ring 313 are spaced along the central axis 20, and the annular wall 311 has A first thread 314 and a second thread 315 are located on opposite sides of the first protruding ring 312 and the second protruding ring 313. The first thread 314 is adjacent to the second mounting unit 4.

The first mounting unit 3 further includes two first sleeves 32 coaxially sleeved on the outer periphery of the mandrel 2, a first bearing 33, a second bearing 34, and a first bearing 33 on opposite sides of the first sleeves 32. The fixing seat 35 is screwed on the second thread 315. The second bearing 34 is fixedly mounted between the mandrel 2 and the second protruding ring 313. The first bearing 33 is fixedly framed around the outer periphery of the mandrel 2 and is connected to the first thread of the ring wall 311. 314 and the first protruding ring 312 cooperate to define a first assembly groove 36.

The second mounting unit 4 includes a second mounting base 41 coupled to the second object 12, a second sleeve 42 sleeved on the outer periphery of the mandrel 2, and two second sleeves 42. A mounting bearing 43 on the opposite side and rotatably mounting the second mounting seat 41 on the outer periphery of the mandrel 2. The second mounting seat 41 has an assembly thread 411 disposed around the central axis 20, and an assembly thread 411 extending from the assembly thread 411 to the The groove bottom surface 412 extending from the central axis 20, the assembly thread 411 and the groove bottom surface 412 cooperate to define a second assembly groove 44 with an opening facing the first assembly groove 36.

The clutch mechanism 5 includes a clutch sprocket 51 screwed in the first assembly slot 36 and a clutch unit 50 mounted in the second assembly slot 44. The clutch sprocket 51 has a number of surrounding the central axis. Each of the latching grooves 511 of 20 has an abutting surface portion 512 extending from the central axis 20 to a radially outer end, and an inclined surface portion 513 curved around the central axis 20. Each of the engaging grooves 511 has an engaging arc angle 514 having the same angle value, and the angle value of the engaging arc angles 514 is related to the number of the engaging grooves 511. In this embodiment, the clutch tooth plate 51 has 30 Since each of the engaging slots 511 is described, the angle value of each engaging arc angle 514 is 12 degrees.

The clutch unit 50 has a linkage seat 52 screwed into the second assembly slot 44, a spacer 53 through which the mandrel 2 can pass and abut against the bottom surface 412 of the slot, and two first clutch components 54. , And a second clutch assembly 54 ′ having the same structure as the first clutch assembly 54. The interlocking seat 52 has two end surfaces 521 spaced along the central axis 20, and a central hole 522, two first assembly holes 523, and a second assembly hole 523 'penetrating the end surfaces 521. The central hole 522 can be passed by the mandrel 2. The first assembly holes 523 and the second assembly holes 523 ′ are arcs arranged around the central axis 20 and both have a hole arc angle with the same angle. W1, there is a first spaced arc angle W2 between the first assembly holes 523, and there is a second spaced arc angle W3 between each first assembly hole 523 and the second assembly hole 523 '. Two interval arc The angle of the angle W3 is not equal to the angle of the first interval arc angle W2.

Each of the first clutch assemblies 54 has a first clutch seat 541 installed in a corresponding first assembly hole 523 on the linkage seat 52, and two first clutch seats 541 on top of the clutch gear 51. Push the first elastic member 542. The first clutch seat 541 has a plurality of first clamping teeth 543 facing the clutch tooth plate 51, and each of the first clamping teeth 543 has an abutment which can correspond to the clamping groove 511 on the clutch tooth plate 51. The first engaging surface 544 against which the abutting portion 512 abuts, and a first slip-out surface 545 that abuts against the inclined surface 513 corresponding to the engaging groove 511. The structure of the second clutch assembly 54 'is the same as that of the first clutch assembly 54, so it also has a second clutch seat 541' and two second elastic members 542 '. The second clutch seat 541 'also has a plurality of second engaging teeth 543', each of which has a second engaging surface 544 'and a second slipping surface 545'.

Referring to FIGS. 1, 4 and 5, when the clutch mechanism 5 is in a first engagement position shown in FIGS. 4 and 5 in this embodiment, the first clutch seats 541 are engaged with the clutch gear 51, that is, The first engaging surface 544 of each first engaging tooth 543 will abut against the abutting surface 512 corresponding to the engaging groove 511, and the first slipping surface 545 of each first engaging tooth 543 will also abut. And the inclined surface 513 corresponding to the corresponding slot 511. When the clutch sprocket 51 is driven to rotate in a forward rotation direction, the first clutch seat 541 is synchronously pushed forward, and the second mounting seat 41 can be driven to synchronize through the connection of the linkage seat 52. Spin.

In the first engagement position, the second assembly hole 523 'for the second clutch assembly 54' is installed at an angle value relative to the first assembly hole 523, and therefore, is installed in the second assembly hole Each second clamping tooth 543 'of the second clutch seat 541' in 523 'will generate a first offset angle α corresponding to the corresponding slot 511, and the angle value of the first offset angle α is greater than Preferably, the angle value of the slot 511 is 40% to 60%, and more preferably 50%. That is, if the angle value of the engagement arc angle 514 is 12 degrees, the angle value of the first offset angle α is 6 degrees. In other words, at the first engagement position, the first clutch seats 541 will engage with the clutch tooth plate 51, but the second clutch seat 541 'will not engage with the clutch tooth plate 51 because of the angular deviation. Together.

Referring to FIGS. 1, 3 and 6, when the clutch mechanism 5 is in a second engagement position shown in FIG. 6 in this embodiment, each second clamping tooth 543 ′ on the second clutch seat 541 ′ is in contact with A corresponding slot 511 is engaged on the clutch tooth plate 51. At this time, a second offset angle β is formed between each of the first clamping teeth 543 and the corresponding slot 511, and the angle value of the second offset angle β and the angle of the first offset angle α The value is the same, that is, at the second engagement position, only the second clutch seat 541 'and the clutch gear 51 are engaged. Therefore, when the clutch gear 51 is driven to rotate forward, the rotation force is It is transmitted to the interlocking seat 52 through the second clutch seat 541 ', and finally drives the second mounting seat 41 to rotate.

It is further explained that if the first mounting seat 31 is driven to rotate in a reverse direction opposite to the forward rotation, the first mounting seat 31 will drive the clutch The tooth plate 51 is reversed, and the inclined surface portion 513 on each of the grooves 511 slips off from the first slippage surface 545 corresponding to the first teeth 543, or the second teeth corresponding to the second teeth The second slip-off surface 545 'of 543' slips off, and the purposes of power transmission and idling can be achieved. When the first mounting seat 31 is driven to rotate forward again, since the first clamping teeth 543 and the second clamping teeth 543 ′ do not surround the center axis 20 at an equal angle after installation, the In the process, one of the first engaging surfaces 544 and the second engaging surfaces 544 'will be closer to the abutting surface 512 corresponding to the clamping teeth 511, and closer to the first As soon as the engagement surface 544 or the second engagement surface 544 'is engaged with the clutch gear 51, the clutch mechanism 5 can be quickly switched to the first engagement position or the second engagement. position. Since the number of teeth and the depth of the engaging grooves 511 need not be changed in the design of this embodiment, and the clutch mechanism 5 allows the first engaging surfaces 544 and the second engaging surfaces 544 to be changed in the process of changing positions. One of the groups is relatively close to the abutting surface 512 corresponding to the engaging tooth 511, so the first embodiment of the present invention can shorten the engaging time while considering the engaging depth.

Referring to Figures 7, 8, and 9, the structure of a second embodiment of the hub of the present invention is similar to that of the first embodiment, except that the clutch mechanism 5 is the clutch mechanism 5 of the second embodiment of the present invention. The clutch gear plate 51 and the clutch unit 50 are included. The structure of the clutch gear plate 51 is the same as that of the first embodiment. The clutch unit 50 also has the linkage seat 52 and the first clutch assembly 54. Each first clutch The components 54 also have the first clutch seat 541 and the first elastic member 542. The first clutch seat 541 The first clamping tooth 543 is also provided.

The difference between this second embodiment and the first embodiment is that, in addition to the first assembly hole 523, the interlocking seat 52 also has two first sections respectively interposed between the first assembly holes 523. Two assembly holes 523 '. The clutch unit 50 has two second clutch components 54 'corresponding to the second assembly holes 523', and each second clutch component 54 'also has the second clutch seat 541' and the second The elastic member 542 'and the second clutch seat 541' also have the second clamping teeth 543 '.

For the same reason, in this embodiment, by adjusting the relative angle between the second assembly holes 523 ′ of the linkage seat 52 and the first assembly holes 523, the clutch mechanism 5 can be located in the first assembly hole shown in FIG. 8. In an engagement position, each first clamping tooth 543 is engaged with the corresponding slot 511, and each second clamping tooth 543 'is formed in the first offset with the corresponding slot 511. Shifting angle α. When the clutch mechanism 5 is located in the second engagement position shown in FIG. 9, each of the second clamping teeth 543 ′ is engaged with the corresponding slot 511, and each of the first clamping teeth 543 is engaged with the corresponding The corresponding slot 511 forms the second offset angle β. Therefore, in addition to the functions described in the first embodiment, the second embodiment of the present invention, since the first clutch components 54 and the second clutch components 54 ′ can be symmetrically engaged with the clutch tooth plate 51, Therefore, this second embodiment also has the effect of more symmetrical and smooth engagement.

In terms of the creative spirit of the present invention, the clutch unit 50 only needs to have one of the first clutch assembly 54 and one of the second clutch assembly 54 '. To achieve the intended creative purpose, in addition, the number of the first clutch component 54 and the second clutch component 54 'of the present invention can be asymmetry as shown in the first embodiment, and can also be as described in the second embodiment. In the symmetrical state shown, the first clutch component 54 and the second clutch component 54 ′ may be three or more. That is, for the purpose of the invention, as long as the first engaging position, each second engaging tooth 543 'is staggered from the corresponding slot 511 by an angle, and when the second engaging position is The first clamping tooth 543 and the corresponding clamping groove 511 are staggered by an angle to achieve the intended purpose. Of course, the present invention can also further add a set of third clamping teeth that have an angular offset with the first clamping teeth 543 and the second clamping teeth 543 ', which will not be illustrated by the illustration.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, any simple equivalent changes and modifications made according to the scope of the patent application and the contents of the patent specification of the present invention are still Within the scope of the invention patent.

Claims (10)

A wheel hub detachably links a first object and a second object, and includes: a mandrel having a central axis; a first mounting unit including a rotatable mounting on the mandrel about the central axis A first mounting base; a second mounting unit including a second mounting base rotatably mounted on the mandrel about the central axis; and a clutch mechanism including a clutch coupled with the first mounting base A gear plate, and a clutch unit mounted on the second mounting seat, the clutch gear plate having a plurality of clamping slots around the central axis, the clutch unit having a linkage seat interlocking with the second mounting seat, and mounting At least one first clutch component and at least one second clutch component on the linkage seat, the first clutch component has a first clutch seat, the first clutch seat has a plurality of first clamping teeth around the central axis, The second clutch assembly has a second clutch seat, and the second clutch seat has a plurality of second clamping teeth around the central axis; when the clutch mechanism is located at In a first engaging position, the first engaging teeth are respectively engaged in the corresponding engaging slots, and the second engaging teeth are staggered from the corresponding engaging slots, respectively. In the second engaging position, the second engaging teeth are respectively engaged in the corresponding slot, and the first engaging teeth are respectively staggered from the corresponding engaging slot. The hub according to claim 1, wherein, in the first engaging position, each second engaging tooth forms a first offset angle with the corresponding engaging groove, and in the second engaging position At this time, a second offset angle is formed between each of the first clamping teeth and the corresponding clamping groove. The hub according to claim 2, wherein each of the engaging grooves of the clutch gear has an engaging arc angle having the same angle value, and the first offset angle and the second offset angle are the card The angle of the arc angle is 40% to 60%. The hub according to claim 3, wherein the first clutch assembly further includes at least one first elastic member that supports the first clutch seat toward the clutch gear disc, and the second clutch assembly further includes at least one The second clutch seat is supported against the second elastic member of the clutch tooth plate. The hub according to claim 4, wherein the linkage seat has a central hole through which the mandrel passes, and two first assembly holes and one second assembly hole provided around the central axis, each of the first Both the assembly hole and the second assembly hole have a hole arc angle with the same angle value, and there is a first spaced arc angle between the first assembly holes, and between each first assembly hole and the second assembly hole Both have a second interval arc angle, and the angle value of the second interval arc angle is different from the angle value of the first interval arc angle; and the clutch unit has two of the first clutch components, each of the first clutches The first clutch seat of the component is installed in the corresponding first assembly hole, and the second clutch seat of the second clutch component is installed in the second assembly hole. The wheel hub according to claim 4, wherein the linkage seat has a central hole through which the mandrel passes, two first assembly holes spaced around the central axis, and two first assembly holes spaced around the central axis. A second assembly hole between the first assembly holes, the clutch unit has two of the first clutch components, and two of the second clutch components, each of the first clutch components A clutch seat is installed in the corresponding first assembly hole, and the second clutch seat of each second clutch component is installed in the second assembly hole. The hub according to any one of claim 2 to claim 6, wherein each of the grooves of the clutch gear has an abutment surface extending from the central axis to a radially outer end, and a surrounding surface A central portion of the inclined surface extending from the abutting portion toward the direction of the other slot, each of the first teeth has a corresponding portion of the slot when the clutch mechanism is in the first slot. A first engaging surface that abuts against the face, and a first slip-out surface that abuts against the inclined surface corresponding to the slot, each second engaging tooth has one when the clutch mechanism is located in the In the second engaging position, a second engaging surface abutting on the abutting surface corresponding to the engaging groove, and a second slipping surface abutting on the inclined surface corresponding to the engaging groove. The hub according to claim 7, wherein the first mounting seat has a ring wall defining a channel and a first protruding ring extending from the ring wall into the channel, and the first mounting unit further includes A first bearing and a second bearing, which are located in the channel and are installed at intervals along the central axis and outside the mandrel, the ring wall, the first protruding ring and the first bearing cooperate to define a direction toward the The first assembling groove of the second mounting seat, the clutch gear is installed in the first assembling groove and is coupled with the first mounting seat in an interlocking manner. The hub according to claim 8, wherein the first mounting seat further has a second protruding ring spaced from the first protruding ring along the central axis, and the second bearing is mounted on the mandrel and the second bearing. Between the rings. The hub according to claim 8, wherein the second mounting unit further includes two mounting bearings for rotatably mounting the second mounting seat on the mandrel, and the second mounting seat has a direction facing the first mounting seat. An assembling slot and a second assembling slot for installing the clutch unit.