CN208470064U - The umbrella tooth device of transmission shaft - Google Patents

Abstract

A kind of umbrella tooth device of transmission shaft, suitable for connecting the transmission shaft and a wheel hub of a bicycle, and the wheel hub is set on a shaft, which includes a umbrella tooth unit and a dry type bearing unit.The umbrella tooth unit has a umbrella tooth and the single-direction transmission coupling systems for the single-direction transmission hub rotation for engaging the transmission shaft.The ratio of the maximum outside diameter of the diameter and umbrella tooth of the shaft is 0.164~0.24.The umbrella tooth and the single-direction transmission coupling systems is respectively set by the both ends of the umbrella tooth unit, the transmission shaft can be linked, and the wheel hub is driven to one-directionally rotate.The umbrella tooth unit can be general with the cooperation of shaft transmission system element on the market, under the speed ratio needed for maintaining, can effectively reduce volume, also mitigate weight.

Description

The umbrella tooth device of transmission shaft

Technical field

The utility model relates to a kind of umbrella tooth device of transmission shaft, particularly relates to a kind of umbrella of the transmission shaft of bicycle Tooth device.

Background technique

Standard bicycle is arranged in pairs or groups with chain and fluted disc, to drive bicycle body to advance.Refering to fig. 1, and in recent years, have A kind of design arranged in pairs or groups using a transmission shaft 91 and a gear 92, the transmission shaft 91 and gear 92 are cooperated and drive the one of bicycle Wheel hub 93.Wherein, which has one and the 92 meshed gears portion 911 of gear, when the transmission shaft 91 is by bicycle When the actuated elements such as crank drive and rotate, it can pass through its gear part 911 and the gear 92 and the wheel hub 93 driven to rotate, reach The purpose for making bicycle body advance, can replace traditional chain, fluted disc whereby.The locking however, gear 92 need to generally arrange in pairs or groups Structure could cooperate with wheel hub 93, therefore the gear 92 need to have certain volume, and the big weight of volume just will increase, and not only increase Manufacturing cost also increases overall weight, and therefore, this case is studied for 92 element of gear for arranging in pairs or groups with the transmission shaft 91 Improvement.

Summary of the invention

The purpose of this utility model, the i.e. umbrella in the transmission shaft for providing a kind of at least one disadvantage that can overcome prior art Tooth device.

The umbrella tooth device of the utility model transmission shaft, suitable for connecting the transmission shaft and a wheel hub of a bicycle, the wheel Hub is set on a shaft of the bicycle, and the umbrella tooth device of the transmission shaft includes a umbrella tooth unit and a dry type axis Bearing unit.

The umbrella tooth unit is located at the first end with opposite a first end and a second end, one and fits Umbrella tooth and one for engaging the transmission shaft are located at the second end and are suitable for the unidirectional of the single-direction transmission hub rotation It is driven coupling systems.The ratio of the maximum outside diameter of the diameter and umbrella tooth of the shaft is 0.164~0.24.Dry type bearing unit peace Loaded in the umbrella tooth unit and for making the smooth rotation of umbrella tooth unit.

Further, which includes the sleeve with the first end and the second end, the single-direction transmission Coupling systems have several groove faces or several ratchets, the sleeve, the umbrella tooth connect with the groove face the integral or sleeve, The umbrella tooth connect integral with the ratchet.

Further, which includes that a mandrel with the first end and one stretch through set for the mandrel Enter and the mounting base with the second end, the umbrella tooth are formed on the mandrel, which is located at the mounting base On.

Further, which has the wall for defining the installation space that one is protruded into for the mandrel, the wall The inner peripheral surface and an outer peripheral surface in contrast to the inner peripheral surface of the mandrel are surrounded with one, and the wall is formed at least One extends to the inner peripheral surface from the outer peripheral surface and is connected to the screw hole of the installation space, which further includes at least one warp It is locked by least one screw hole with by the mounting base and the securing fixing piece of the mandrel.

Further, which has several ratchets.

Further, which has several pawls.

Further, first end also comprising a neighbouring umbrella tooth unit, and for positioning the umbrella tooth unit and being somebody's turn to do The end cap of relative position between wheel hub.

Further, which includes a body part and an end face axis from the body part with an end face To the axle portion for extending and surrounding the shaft, which is suitable for being set on the axle portion, which includes ring Cover the first bearing and a second bearing of the axle portion, the first bearing have one by the end face and the umbrella tooth unit every The stopper opened, the second bearing separate the umbrella tooth unit with the axle portion.

Further, the ratio of the maximum outside diameter of the diameter and umbrella tooth of the shaft is 0.188~0.237.

Further, the number of teeth of the umbrella tooth of the umbrella tooth unit is 14~24.

Further, the number of teeth of the umbrella tooth of the umbrella tooth unit is 15~20.

Further, which includes a main paragraph with the second end and one connects the main paragraph and outer Diameter is less than the mandrel section of the main paragraph, which has the first end, which is fixed on the mandrel section.

The effect of the utility model, is: the umbrella tooth and the unidirectional biography is respectively set by two opposite ends of the umbrella tooth unit Dynamic coupling systems, can link the transmission shaft, and the wheel hub is driven to one-directionally rotate.It arranges in pairs or groups outside the diameter of the shaft and the maximum of umbrella tooth The ratio of diameter limits, and meets required transmission ratio and umbrella tooth structure size, therefore the umbrella tooth unit can not only be with axis on the market Drive train element cooperation is general, under the speed ratio needed for maintaining, can more effectively reduce volume, also mitigate weight.And the dry type axis Bearing unit makes the utility model be not necessary to additional designs lock solid structure or element, so that it may reach the function of installing the umbrella tooth unit, and Make the smooth rotation of umbrella tooth unit, which also can swimmingly drive the hub rotation, keep power transmitting efficiency good.

Detailed description of the invention

Other features and effect of the utility model will be clearly presented in the embodiment referring to schema, in which:

Fig. 1 is a perspective view, illustrates a known transmission shaft and a gear；

Fig. 2 is a three-dimensional combination figure of a first embodiment of the umbrella tooth device of the utility model transmission shaft；

Fig. 3 is a stereogram exploded view of the first embodiment；

Fig. 4 is an incomplete section view constitutional diagram of the first embodiment；

Fig. 5 is a stereogram exploded view of a second embodiment of the umbrella tooth device of the utility model transmission shaft；

Fig. 6 is an incomplete section view constitutional diagram of the second embodiment；And

Fig. 7 is a stereo decomposing of the subelement of a 3rd embodiment of the umbrella tooth device of the utility model transmission shaft Figure.

Specific embodiment

Before the utility model is described in detail, it shall be noted that in the following description content, similar element be with It is identically numbered to indicate.

Refering to Fig. 2,3,4, a first embodiment of the umbrella tooth device of the utility model transmission shaft 11 is suitable for connection one certainly Transmission shaft 11 and a wheel hub 12 of driving, one end of the transmission shaft 11 adjacent to the bicycle a crank (not shown), separately One end is far from the crank and has an engaging portion 111, which includes a umbrella tooth 112.The wheel hub 12 includes an ontology Portion 121 and an axle portion 122.Wherein, which has an end face 123 and several ratchets 124.The axle portion 122 is from the ontology The end face 123 in portion 121 is axially extending out.The bicycle further includes a shaft 13, which is assembled in Rear frame, and the wheel Hub 12 is set on the shaft 13 and can rotate relative to the shaft 13, and the body part 121 and axle portion 122 of the wheel hub 12 surround the axis Bar 13.The umbrella tooth device includes 2, dry type bearing units 3 of a umbrella tooth unit and an end cap 4.

The umbrella tooth unit 2 is suitable for being assembled with the wheel hub 12, and has an opposite first end 201 including one With 21, one, sleeve engaging portions for being located at the first end 201 and being suitable for engaging the transmission shaft 11 of a second end 202 111 umbrella tooth 22 and a single-direction transmission coupling for being located at the second end 202 and being rotated suitable for the single-direction transmission wheel hub 12 It is combined 23.

Wherein, the axial axle portion 122 for being set in the wheel hub 12 of the sleeve 21, and with one around the interior of the axle portion 122 Circumferential surface 211.The number of teeth of the umbrella tooth 112 of the number of teeth and engaging portion 111 of the umbrella tooth 22 cooperates, and the number of teeth of umbrella tooth 22 is preferably 14~24, be more preferably 15~20,22 size of umbrella tooth caused by the result of this range, with can cooperate the number of teeth, modulus, Optimal matched combined can be presented in speed ratio.It can provide needed transmission ratio by above-mentioned 22 number of teeth of umbrella tooth appropriate.Preferably, The ratio (i.e. d1/d2) of the maximum outside diameter d2 of the diameter d1 and umbrella tooth 22 of the shaft 13 is 0.164~0.24, more preferably, should Ratio is 0.188~0.237.It is designed by above-mentioned ratio and 22 number of teeth of umbrella tooth, makes the maximum outside diameter of the umbrella tooth 22 than existing The maximum outside diameter for being assembled in the umbrella tooth at this is small, therefore 2 entirety of umbrella tooth unit of the utility model is small in size, light-weight.

The single-direction transmission coupling systems 23 have on several outer peripheral surfaces for being formed in the sleeve 21 and define a groove respectively 230 groove face 232 and several equiangularly spaced settings and the pawl 231 for being respectively arranged in the groove face 232.The pawl 231 are suitable for engaging with the ratchet 124 of the wheel hub 12, to drive the wheel hub 12 can only be towards the direction for making bicycle advance One-directional rotation.It is noted that the pawl and ratchet position are interchangeable, that is to say, that the wheel when the utility model is implemented The body part 121 of hub 12 can be equipped with several pawls, and the single-direction transmission coupling systems 23 have several spine for taking shape in the sleeve 21 Tooth, the sleeve 21, the umbrella tooth 22 can be connect integral with the ratchet at this time.On the other hand, the ratchet also may be constructed One element, and be assembled on sleeve 21, such single-direction transmission coupling systems 23 equally energy single-direction transmission wheel hub 12.

It is noted that the sleeve 21 of the umbrella tooth unit 2 of this first embodiment, the umbrella tooth 22 and the groove face 232 connect Connect integral, the pawl 231 is installed in the groove 230, therefore the alignment of the element is good.

The dry type bearing unit 3 is installed in the umbrella tooth unit 2, and one of the axle portion 122 including the ring set wheel hub 12 First bearing 31 and a second bearing 32.The first bearing 31 is set to the end face 123 and sleeve 21 of the body part 121 The inner peripheral surface 211 at, and the stopper 311 being located on the end face 123 with one, the stopper 311 is by the end face 123 and the umbrella Tooth unit 2 separates.The second bearing 32 is located between the axle portion 122 of the wheel hub 12 and the inner peripheral surface 211 of the sleeve 21, will The axle portion 122 is separated with the umbrella tooth unit 2.It, can be smooth turn after driving the umbrella tooth unit 2 by the dry type bearing unit 3 It is dynamic.And it is that dry type bearing arrangement is small using dry type bearing rather than the advantages of other kind of bearing (such as ball bearing), it can be with The all lesser umbrella tooth unit 2 of the volume of the utility model, outer diameter is arranged in pairs or groups, and it is small in such precision of bicycle, scale to be suitable for use Device.Dry type bearing has good self-lubricity, is a kind of exempt from customs examination oil bearing, easy to use.

The end cap 4 is incorporated near the first end 201 of the umbrella tooth unit 2, and the axle portion 122 of the ring set wheel hub 12, with The relative position between the umbrella tooth unit 2 and the wheel hub 12 is positioned, it, will not be because of fortune after so that the umbrella tooth unit 2 is sheathed on the axle portion 122 Turn to cause to shake and be displaced, to avoid transmission efficiency is influenced.

It is moved in use, turn is stepped in the direction that the pedal of bicycle moves forward by user, and penetrates the crank handle turns transmission Axis 11 is around its own center axis thereof, and then the umbrella tooth 112 that can pass through the engaging portion 111 drives the umbrella tooth unit 2 rotation, To drive the wheel hub 12 to rotate, achieve the purpose that bicycle is driven to advance.When the direction that user shrinks back pedal is stepped on Rotation, though the umbrella tooth unit 2 can be driven to rotate backward, because of the pawl 231 and the wheel hub 12 of the single-direction transmission coupling systems 23 Ratchet 124 arrange in pairs or groups, therefore the umbrella tooth unit 2 can only dally, and without driving the wheel hub 12 to rotate, will not lead to bicycle It retreats.

In conclusion the umbrella tooth 22 and the single-direction transmission coupling systems is respectively set by two opposite ends of the umbrella tooth unit 2 23, on the one hand link through umbrella tooth 22 and the transmission shaft 11, on the other hand drives the wheel hub through the single-direction transmission coupling systems 23 12 one-directional rotations, and due to the ratchet 124 of the pawl of the single-direction transmission coupling systems 23 231 and wheel hub 12 all with Regular Bicycle Shaft transmission system common-use size is identical, be fit directly into the umbrella tooth device can on commercially available general wheel hub 12, therefore not With the wheel group or other parts for being particularly developed special requirement.The umbrella tooth 22 of arranging in pairs or groups has the number of teeth appropriate and the shaft 13 The ratio of diameter and the maximum outside diameter of umbrella tooth 22 limits, transmission ratio needed for meeting the utility model and 22 structure size of umbrella tooth, Make to effectively reduce volume under the utility model speed ratio needed for maintaining, also mitigate weight.And the dry type bearing unit 3 makes this Utility model is not necessary to additional designs lock solid structure or element, so that it may reach the function of installing the umbrella tooth unit 2, make umbrella tooth unit 2 It consolidates and combines with wheel hub 12, and make the smooth rotation of umbrella tooth unit 2, which also can swimmingly drive the wheel hub 12 to rotate, Keep power transmitting efficiency good.

Refering to Fig. 5,6, a second embodiment of the umbrella tooth device of the utility model transmission shaft, the knot with the first embodiment Structure is roughly the same, is different in: the umbrella tooth unit 2 of this second embodiment is that several elements assemble, and have including one There are mandrel 24, one of the first end 201 mounting bases 25 be inserted in and there is the second end 202 that stretch through for the mandrel 24, And several fixing pieces 26.The umbrella tooth 22 is formed in the first end 201 of the mandrel 24, which is located at should The second end 202 of mounting base 25.Wherein, which there is one to define the installation sky protruded into for the mandrel 24 Between 250 wall 251, the wall 251 have one around the mandrel 24 inner peripheral surface 252 and one in contrast to the inner peripheral surface 252 Outer peripheral surface 253, and the wall 251 be formed with it is several extend to the inner peripheral surface 252 from the outer peripheral surface 253 and be connected to the installation sky Between 250 screw hole 254.The fixing piece 26 is screw, and is locked respectively via the screw hole 254, and one end of fixing piece 26 24 surface of mandrel is resisted, the mandrel 24 and the mounting base 25 are fixed.

This second embodiment is assembled by this two elements of the mandrel 24 and mounting base 25, and mandrel 24 and mounting base It is each provided with the umbrella tooth 22 and the single-direction transmission coupling systems 23 on 25, is equally applicable to link the transmission shaft 11 (Fig. 2) and the wheel Hub 12 reaches effect identical as the first embodiment.And have the advantages that easy processing, easy volume production by two-piece components, In production, which can position to form the umbrella tooth 22 to process convenient for clamp tool.

Refering to Fig. 7, a 3rd embodiment of the umbrella tooth device of the utility model transmission shaft, the structure with the first embodiment Roughly the same, be different in: the sleeve 21 of this third embodiment includes a main paragraph 212 and one from the main paragraph 212 extensions forward and outer diameter are less than the mandrel section 213 of the main paragraph 212.The main paragraph 212 has the second end 202, the core Shaft part 213 has the first end 201.The umbrella tooth 22 is fixed in the mandrel section 213 of the sleeve 21 in the way of tight fit.

Only as described above, only the embodiments of the present invention are implemented when that cannot limit the utility model with this Range, it is all according to simple equivalence changes made by present utility model application the scope of the patents and patent specification content with repair Decorations all still belong in the range of the utility model patent covers.

Claims (12)

1. a kind of umbrella tooth device of transmission shaft, suitable for connecting the transmission shaft and a wheel hub of a bicycle, which is set in On one shaft of the bicycle, which is characterized in that the umbrella tooth device of the transmission shaft includes:

One umbrella tooth unit is located at the first end with opposite a first end and a second end, one and fits Umbrella tooth and one for engaging the transmission shaft are located at the second end and are suitable for the unidirectional of the single-direction transmission hub rotation Coupling systems are driven, the ratio of the maximum outside diameter of the diameter and umbrella tooth of the shaft is 0.164~0.24；And

One dry type bearing unit is installed in the umbrella tooth unit and for making the smooth rotation of umbrella tooth unit.

2. the umbrella tooth device of transmission shaft according to claim 1, which is characterized in that the umbrella tooth unit has including one should The sleeve of first end and the second end, the single-direction transmission coupling systems have several groove faces or several ratchets, the sleeve, the umbrella Tooth connect the integral or sleeve with the groove face, the umbrella tooth connect with the ratchet it is integral.

3. the umbrella tooth device of transmission shaft according to claim 1, which is characterized in that the umbrella tooth unit has including one should The mandrel of first end and the mounting base be inserted in and have the second end that stretches through for the mandrel, the umbrella tooth are formed in On the mandrel, which is located in the mounting base.

4. the umbrella tooth device of transmission shaft according to claim 3, which is characterized in that the mounting base has one and defines one The wall of a installation space protruded into for the mandrel, the wall are opposite around the inner peripheral surface of the mandrel and one with one In the outer peripheral surface of the inner peripheral surface, and the wall is formed at least one and extends to the inner peripheral surface from the outer peripheral surface and be connected to the installation The screw hole in space, which, which further includes at least one, locks via at least one screw hole with by the mounting base and the mandrel Securing fixing piece.

5. the umbrella tooth device of transmission shaft according to claim 1, which is characterized in that the single-direction transmission coupling systems have several Ratchet.

6. the umbrella tooth device of transmission shaft according to claim 1, which is characterized in that the single-direction transmission coupling systems have several Pawl.

7. the umbrella tooth device of transmission shaft according to claim 1, which is characterized in that also comprising the neighbouring umbrella tooth unit The first end, and the end cap for positioning relative position between the umbrella tooth unit and the wheel hub.

8. the umbrella tooth device of transmission shaft according to claim 1, which includes the body part with an end face, An and axle portion extended from the end face axial of the body part and surround the shaft, which is characterized in that the umbrella tooth unit is suitable For being set on the axle portion, which includes a first bearing and a second bearing for the ring set axle portion, should First bearing has the stopper for separating the end face and the umbrella tooth unit, and the second bearing is by the umbrella tooth unit and the axle portion It separates.

9. the umbrella tooth device of transmission shaft according to claim 1, which is characterized in that the diameter of the shaft and the umbrella tooth are most The ratio of big outer diameter is 0.188~0.237.

10. the umbrella tooth device of transmission shaft according to claim 1, which is characterized in that the tooth of the umbrella tooth of the umbrella tooth unit Number is 14~24.

11. the umbrella tooth device of transmission shaft according to claim 9 or 10, which is characterized in that the umbrella tooth of the umbrella tooth unit The number of teeth be 15~20.

12. the umbrella tooth device of transmission shaft according to claim 2, which is characterized in that the sleeve include one have this The main paragraph of two ends and one connect the main paragraph and outer diameter is less than the mandrel section of the main paragraph, which has should First end, the umbrella tooth are fixed on the mandrel section.