CN201031894Y - High-sealing external catch type ratchet wheel coloured hub - Google Patents

Abstract

A high-tightness external pawl ratchet wheel hub comprises a mandrel unit, a rotary hull which is supported by the mandrel, a chain wheel base which is arranged on the mandrel unit by a shaft, a clutch unit which can make the hull and the chain wheel base meshed with each other unidirectionally, and a sealing unit which is corresponding to the chain wheel base and arranged in the hull. The chain wheel base is equipped with a plurality of circular grooves which are arranged around the axis and the sealing unit is equipped with a plurality of blockage pieces which can be fit over the circular grooves. With the embedded combination of the blockage pieces and the circular grooves, the utility model can produce multi-layer blockage effect and realize excellent waterproof and dust-proof effect.

Description

The outer pawl formula ratchet flower hub of high leak tightness

Technical field

The utility model relates to a kind of colored hub, particularly relates to a kind of outer pawl formula ratchet flower hub of high leak tightness.

Background technique

As shown in Figure 1, the colored hub (U. S. Patent the 7121394th B2 cases that this case claimant is all) of existing a kind of outer pawl formula ratchet includes an axle unit 1, one and is rotatably clutch unit 3 that the housing that supported by this axle unit 12, one be arranged on these housing 2 inside, one and utilizes chain pulley seat 4 that this clutch unit 3 is attached at these 2 one ends of housing and one to be set in these housing 2 inside and the block sealing unit 5 in these clutch unit 3 outsides.This housing 2 has a perisporium 202 that can define an endoporus 201, this endoporus 201 a wherein end is provided with a containing groove group 203 and a groove 204 of being located at these containing groove group 203 outsides vertically, this chain pulley seat 4 has a ratchet ring that stretches to these housing 2 inside 401, position portion that is embedded 402 in these ratchet ring 401 outsides, and this clutch unit 3 has most pawls 301 and most provides described pawl 301 to keep butted elastic component (figure does not show) on this ratchet ring 401.Sealing unit 5 is sheets ringwise, and has one and be nested in this and be embedded location ring portion 501 and a stopper 502 of radially being extended towards an inner ring surface 204 ' that constitutes this groove 204 by these location ring portion 501 peripheries in the portion 402.

Though this colored hub can reach the application target of expection, but, end on this inner ring surface 204 ' 5 of sealing unit because utilizing this stopper 502 to support, to produce the barrier effect of individual layer, and stopper 502 is directly to meet to flower hub outside, if have sand grains, foreign matter to block between this stopper 502 and this inner ring surface 204 ', then will have influence on the effect of waterproof and dustproof.

The model utility content

The purpose of this utility model is to utilize multiple tracks mazy type (labyrinthine) to stop and can produce the outer pawl formula ratchet flower hub of the high leak tightness of preferable waterproof and dustproof effect providing a kind of.

The outer pawl formula ratchet flower hub of the utility model high leak tightness comprises an axle unit, housing that is rotatably supported by this axle unit, axle and is located at clutch unit and sealing unit that is set between this housing and this chain pulley seat that chain pulley seat on this axle unit, can make this housing and this chain pulley seat generation one way engagement.This axle unit is to extend along an axis.This housing has a perisporium around this axis, and this a perisporium wherein end is provided with a containing groove group and a restraining groove of being located at this containing groove group outside along this axis.This chain pulley seat is that the position is in this housing one side, and have one and stretch the ratchet ring that is located in this containing groove group, a baffle ring that is arranged on this ratchet ring outside, this baffle ring has annular grooves that end face that should the restraining groove opening portion, most are arranged with towards inside by this end face and are provided with around this axis, described annular groove respectively be by a groove bottom, interior side ring surface and one with should in side ring surface opposite external side anchor ring define and be the U type.This clutch unit is arranged in the containing groove group of this housing, and can produce one way engagement with this ratchet ring.The sealing unit is to make the hollow ring round, and be fixed in the restraining groove of this housing, and have a inner side surface, one and the opposing setting of this inner side surface and protrude by this outer side surface and be link spring shape and be set in the sheet of blockading in the annular groove respectively with respect to the outer side surface of this end face, most adjacent to this clutch unit and containing groove group, the described terminal part of sheet of blockading support respectively end in interior side ring surface and outside anchor ring wherein one with the groove bottom joining place.

The beneficial effects of the utility model are: utilize the sheet terminal part of blockading of sealing unit support to end in interior side ring surface and outside anchor ring wherein one with the groove bottom joining place, be to produce the mazy blocking effect of multiple tracks, and can produce preferable waterproof and dustproof effect.

Description of drawings

Fig. 1 is the combination generalized section of existing a kind of outer pawl formula ratchet flower hub;

Fig. 2 is the combination generalized section of first preferred embodiment of the utility model;

The cross-sectional schematic that Fig. 3 is got along the straight line 2-2 among Fig. 2;

Fig. 4 is the plane exploded view of the above-mentioned preferred embodiment of the utility model, illustrates that a chain pulley seat and a sealing unit can work in coordination;

Fig. 5 is the local enlarged diagram of the above-mentioned preferred embodiment of the utility model, illustrates that chain pulley seat cooperates with sealing unit can produce the twice barrier effect;

Fig. 6 is the combination generalized section of second preferred embodiment of the utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is elaborated:

As shown in Figures 2 and 3, outer pawl formula ratchet flower hub first preferred embodiment of the utility model high leak tightness, be applicable to the interlock of most sprocket wheels, and include an axle unit 10, one and be rotatably the housing that supported by this axle unit 10 20, axle and be located at chain pulley seat 30 on this axle unit 10, one and can make clutch unit 40 that this housing 20 and this chain pulley seat 30 produce one way engagement and one should chain pulley seat 30 being set in the sealing unit 50 in this housing 20.

This axle unit 10 has the axostylus axostyle 11 and the most individual bearing 12 that is located on this axostylus axostyle 11 of organizing that extend along an axis L.

This housing 20 has a perisporium 22 that also can define an endoporus 21 around this axis L, this perisporium 22 a wherein end is provided with a containing groove group 23 and a restraining groove 24 of being located at these containing groove group 23 outsides along this axis L, this containing groove group 23 has most the containing grooves 231 that are arranged with along hoop by these perisporium 22 inner ring surfaces, and the side direction of described containing groove 231 all connects with this restraining groove 24.

The chain pulley seat 30 of present embodiment has one can be for fixing barrier part 31 and the location ring 32 that is spirally connected vertically with this barrier part 31 of most sprocket wheels (figure does not show) assembling, this barrier part 31 has most and is located at outer circumferential face and for the fixing square crozes 311 of sprocket wheel assembling, and this location ring 32 has one and stretches the ratchet ring that is located in this containing groove group 23 33, a baffle ring 34 and a screwing part 35 that is arranged on these baffle ring 34 outsides and is spirally connected with this barrier part 31 along axis L that is arranged on these ratchet ring 33 outsides.As shown in Figure 4, this baffle ring 34 has first annular groove 36, second annular groove 37 and the fin 38 between 36,37 of this first and second annular grooves that is arranged with and is centered around these first annular groove, 36 outsides by this end face 341 towards inside that end face 341 that should restraining groove 24 opening portions, is arranged with towards inside by this end face 341 and is provided with around this axis L.This end face 341 have a contiguous periphery and position these first and second annular groove 36,37 outsides against the position 342, this first and second annular groove 36,37 respectively be by 362,372 and one of side ring surfaces in first and second of 361,371, one of first and second groove bottom and first and second groove bottom 361,371 vertical connections with this first and second in outside relative first and second in side ring surface 362,372 anchor ring 363,373 define and be the U type.

This clutch unit 40 have most respectively group be located at pawl 41 in the described containing groove 231 and most and be installed in the containing groove 231 and provide described pawl 41 to keep butted elastic component 42 on this ratchet ring 33.

As shown in Figure 4, sealing unit 50 is to make the hollow ring round and be fixed in the restraining groove 24 of this housing 20, and has a main body 51 made from the rubber material and one and be coated on the inner and stiffener 52 that make with metal material of this main body 51.

This main body 51 has an inner side surface 511 adjacent to this clutch unit 40 and containing groove group 23, one and these inner side surface 511 opposing settings and protruded to be link spring shape and to be set in first in this first annular groove 36 by this outer side surface 512 with respect to the outer side surface 512 of this end face 341, one blockades that to be centered around this first blockade sheet 513 outside and be set in the sheet 514 of blockading of second in this second annular groove 37 for sheet 513 and one.This outer side surface 512 have one with should be against the position the 342 driving fit positions 515 of fitting, this is first years old, two sheets 513 of blockading, 514 respectively have a binding end 513 ' that is attached on this outer side surface 512,514 ' and one and described binding end 513 ', 514 ' is provided with on the contrary and supports respectively and end first, side ring surface 362 in two, 372 and first, two groove bottom 361, the terminal part 513 of 371 joining places "; 514 ", and this is first years old, two sheets 513 of blockading, the 514th, by linking end 513 ', 514 ' distad 513 "; 514 " be diagonally extending towards axis L, and tapered ring plate shape.

The cross section of this stiffener 52 is L-shaped, and has a ring portion 521 of extending vertically and a dish portion 522 of radially extending.

Fig. 2 and shown in Figure 5 for another example, after whole assembly is finished, sealing unit 50 is to compel to be enclosed within this restraining groove 24, and utilize this inner side surface 511 to provide this clutch unit 40 to produce axial limiting, should fit on this driving fit position 515 against position 342, and first and second sheet 513,514 of blockading that protrudes from outer side surface 512 is nested in first and second annular groove 36,37 of this chain pulley seat 30, and terminal part 513 ", 514 " support to end side ring surface 362,372 and first and second groove bottom 361,371 joining places in first and second respectively.Therefore, utilize this first, two sheets 513 of blockading, 514 and first, two annular grooves 36,37 nested cooperation, can produce twice mazy type barrier effect, utilize again be located at this first, two annular grooves 36,37 fin 38, even sand grains is then arranged, foreign matter blocks at this second terminal part 514 of blockading sheet 514 " and 372 of this second inner ring surfaces; then this fin 38 still provides barrier effect; and make sand grains; foreign matter is not easy to infiltrate to these first blockade sheet 513 and these first annular groove, 36 nested places again; thus can produce splendid effect, and can produce preferable waterproof; dustproof effect.

Moreover, because of the open port of this first and second annular groove 36,37 is with respect to sealing unit 50, and it is opposing in the outside of flower hub, and utilize and to fit on this driving fit position 515 against position 342,50 of this baffle ring 34 and sealing unit can produce preferable leakage proof effect, can prevent that also moisture content, dust from directly oozing to these second blockade sheet 514 and these second annular groove, 37 nested places, can guarantee preferable blocking effect.

Again as shown in Figure 6, the utility model second embodiment's colored hub also includes an axle unit 10 ', one and is the housing 20 ' that rotatably supported by this axle unit 10 ', axle and is located at chain pulley seat 30 ' on this axle unit 10 ', one and can makes clutch unit 40 ' that this housing 20 ' and this chain pulley seat 30 ' produce one way engagement and one to should chain pulley seat 30 ' being set in the sealing unit 50 ' in this housing 20 '.Wherein shape, the structure of this axle unit 10 ', housing 20 ', clutch unit 40 ' and sealing unit 50 ' are identical with first embodiment haply.And be with first embodiment's difference: this chain pulley seat 30 ' is applicable to the interlock of single sprocket wheel, and this chain pulley seat 30 ' is to make in one-body molded mode, and have baffle ring 34 ' and sprocket wheel 39 ' that is arranged on this baffle ring 34 ' outside along axis L that a ratchet ring 33 ', are arranged on this ratchet ring 33 ' outside, and the shape and structure of this baffle ring 34 ' is identical with first embodiment's baffle ring 34, and also can cooperate with sealing unit 50 ' and produce twice mazy type blocking effect.

Claims (7)

1. the outer pawl formula ratchet of a high leak tightness is spent hub, comprise the housing that an axle unit, one supported, axle and be located at clutch unit that chain pulley seat on this axle unit, one make that this housing and this chain pulley seat produce one way engagement and one, it is characterized in that should chain pulley seat being set in the sealing unit in this housing by this axle unit:

This axle unit is to extend along an axis;

This housing has a perisporium around this axis, and this a perisporium wherein end is provided with a containing groove group and a restraining groove of being located at this containing groove group outside along this axis;

This chain pulley seat, be that the position is in this housing one side, and have one and stretch the ratchet ring that is located in this containing groove group, a baffle ring that is arranged on this ratchet ring outside, this baffle ring has annular grooves that end face that should the restraining groove opening portion, most are arranged with towards inside by this end face and are provided with around this axis, described annular groove respectively be by a groove bottom, interior side ring surface and one with should in side ring surface opposite external side anchor ring define and be the U type;

This clutch unit is arranged in the containing groove group of this housing, and produces one way engagement with this ratchet ring;

The sealing unit, be to make the hollow ring round, and be fixed in the restraining groove of this housing, and have a inner side surface, one and the opposing setting of this inner side surface and protrude by this outer side surface and be link spring shape and be set in the sheet of blockading in the described annular groove respectively with respect to the outer side surface of this end face, most adjacent to this clutch unit and containing groove group, a terminal part of the described sheet of blockading support respectively end in interior side ring surface and outside anchor ring wherein one with the groove bottom joining place.

2. the outer pawl formula ratchet of high leak tightness as claimed in claim 1 is spent hub, it is characterized in that: this chain pulley seat is fixing for most sprocket wheel assemblings, also have one for fixing barrier part and the location ring that is spirally connected vertically with this barrier part of described sprocket wheel assembling, this location ring is provided with this ratchet ring, this baffle ring and a screwing part that is arranged on this baffle ring outside and is spirally connected with this barrier part along axis.

3. the outer pawl formula ratchet of high leak tightness as claimed in claim 1 is spent hub, and it is characterized in that: this chain pulley seat is to make in one-body molded mode, also has a sprocket wheel that is arranged on this baffle ring outside along axis.

4. the outer pawl formula ratchet of high leak tightness as claimed in claim 1 is spent hub, it is characterized in that: the sealing unit has a main body and the stiffener that is coated on this body interior and makes with metal material made with the rubber material, this main body has this inner side surface, outer side surface and the sheet of blockading, the cross section of this stiffener is L-shaped, and has a ring portion of extending vertically and a dish portion of radially extending.

5. the outer pawl formula ratchet of high leak tightness as claimed in claim 4 is spent hub, it is characterized in that: the sheet terminal part of blockading of sealing unit supports and ends side ring surface and this groove bottom joining place in this.

6. the outer pawl formula ratchet of high leak tightness as claimed in claim 4 is spent hub, it is characterized in that: the sheet of blockading of sealing unit also respectively has a binding end that is attached on this main body, described binding end is opposite with terminal part to be provided with, and the sheet of blockading is to be towards axis tilt by binding end distad to extend.

7. the outer pawl formula ratchet of high leak tightness as claimed in claim 1 is spent hub, it is characterized in that: the end face of this chain pulley seat have a contiguous periphery and position the annular groove outside against the position, the outer side surface of sealing unit also have one with should be against the driving fit position of position applying.

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