CN208417322U - A kind of connection structure of ring gear and one-way clutch - Google Patents

Abstract

The utility model discloses the connection structures of a kind of ring gear and one-way clutch, including ring gear and one-way clutch；Ring gear includes the plastics ring gear ontology and metal insert of coaxial arrangement, and one-way clutch includes outer ring, inner ring and the rolling supporting structure of coaxial arrangement；The outer circumference surface of the inner peripheral surface of plastics ring gear ontology and metal insert connects, and the inner peripheral surface of metal insert and the outer circumference surface of outer ring connect, and the inner peripheral surface of outer ring is equipped with multiple circumferentially uniformly distributed curved indentations；Rolling supporting structure is arranged between outer ring and inner ring.Connection structure overall weight provided by the utility model is light, one-way clutch friction is small, can improve cycling sense.

Description

A kind of connection structure of ring gear and one-way clutch

Technical field

The utility model relates to technical field of motors, and in particular to a kind of to apply in the small hyper tape gear hub motor of bicycle On ring gear and one-way clutch connection structure.

Background technique

The existing small hyper tape gear hub motor ring gear one-way function existing structure of bicycle is that gear ring inner hole is equipped with rolling Pillar one-way clutch, and gear ring is metalwork.However, leading to gold since metal is heavier, roller one-way clutch friction is larger Category gear ring and roller one-way clutch weight is big, noise is big, one-way clutch is easy to damage, and cycling sense is poor.

Utility model content

To solve the technical problems existing in the prior art, the utility model proposes a kind of ring gear and one-way clutch Connection structure, specific technical solution are as described below:

A kind of connection structure of ring gear and one-way clutch, including ring gear and one-way clutch；

The ring gear includes the plastics ring gear ontology and metal insert of coaxial arrangement, and the one-way clutch includes same Outer ring, inner ring and the rolling supporting structure of axis setting；

The inner peripheral surface of the plastics ring gear ontology is connect with the outer circumference surface of the metal insert, the metal insert Inner peripheral surface connect with the outer circumference surface of the outer ring, the inner peripheral surface of the outer ring is equipped with multiple circumferentially uniformly distributed Curved indentations；Optionally, the inner peripheral surface of the inner ring is equipped with the keyway axially extended, can be and flat key, spline Etc. matched keyway；Optionally, keyway is not provided on the inner peripheral surface of the inner ring, inner peripheral surface is connect with main shaft using interference Equal nonbondings connection type；The rolling supporting structure is arranged between the outer ring and the inner ring.

Further, annular groove and groove are provided on the outer circumference surface of the metal insert；

The annular groove is for preventing the plastics ring gear ontology along the axial float of the metal insert；

The groove is for preventing the plastics ring gear ontology along the circumferential play of the metal insert.

Further, the outer circumference surface of the radially projecting metal insert of the side wall of the annular groove.

Further, the annular groove and the groove are arranged on the same circumference, and the annular groove and the groove are along institute The circumferential direction for stating metal insert is successively arranged alternately；Alternatively, the annular groove is arranged on different circumference from the groove.

Further, the metal insert includes one of machined piece, metallic sintered products and stamping parts or a variety of.

Further, the radial cross-sectional shape of the curved indentations is band intensity gradient curve, the side with intensity gradient curve Curvature be greater than the other side with intensity gradient curve curvature.

Further, the rolling supporting structure includes retainer, needle roller and spring, and the retainer is equipped with multiple edges Circumferential uniformly distributed retention groove, the retention groove and the curved indentations correspond；

The needle roller and a spring, the needle roller and the spring are equipped in each retention groove Length direction axially extend；

The side of the needle roller, and section of the curved indentations corresponding with the side of the needle roller is arranged in the spring Surface curve radius is less than the cross section curve radius of the curved indentations corresponding with the other side of the needle roller.

Further, the spring is V-arrangement spring, and the open end of the V-arrangement spring is towards the needle roller, the V-arrangement bullet The closed end of spring is connect with retainer；

Alternatively, the spring is Z-shaped spring, one end of the Z-shaped spring is contacted with the needle roller, the Z-shaped spring The other end is connect with the retainer.

Further, the outer ring and the connection type of the metal insert include that interference connect, is keyed and pin connection One of or it is a variety of.

Further, the outer ring and the inner ring are inseparable integral structure, alternatively, the outer ring with it is described Inner ring is separate structure.

The utility model has the following beneficial effects: the utility model uses metal insert form ring gear and needle-type list To clutch, overall weight is light, one-way clutch friction is small, and cycling sense is more preferable.

The additional aspect and advantage of the utility model will be set forth in part in the description, partially will be from following description In become obvious, or recognized by the practice of the utility model.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it can also be obtained according to these attached drawings other attached drawings.

Fig. 1 is a structural representation of the connection structure of ring gear and one-way clutch provided by the embodiment of the utility model Figure；

Fig. 2 is that another structure of the connection structure of ring gear and one-way clutch provided by the embodiment of the utility model is shown It is intended to；

Fig. 3 is the schematic cross-sectional view of the connection structure of ring gear and one-way clutch provided by the embodiment of the utility model；

Fig. 4 is the structural schematic diagram of metal insert provided by the embodiment of the utility model；

Fig. 5 is the sectional view of one-way clutch provided by the embodiment of the utility model radially；

Fig. 6 is the structural schematic diagram of one-way clutch outer ring provided by the embodiment of the utility model；

Fig. 7 is the schematic cross-sectional view provided by the embodiment of the utility model with gear hub motor.

Wherein, 11- plastics ring gear ontology, 12- metal insert, 121- annular groove, the side wall of 1211- annular groove, 122- groove, The outer ring 21-, 211- curved indentations, 22- inner ring, 221- keyway, 23- retainer, 24- needle roller, 25- spring.

Specific embodiment

The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model Limitation.

In the description of the present invention, it should be understood that term " on ", "lower", "top", "bottom", "inner", "outside" etc. The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model It is described with simplifying, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation Construction and operation, therefore should not be understood as limiting the present invention.The meaning of " multiple " in the description of the present invention, It is two or more, unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, can make to be fixedly connected, may be a detachable connection, or integral；It can be Mechanical connection, is also possible to be electrically connected；It can make to be connected directly, two can also be can be indirectly connected through an intermediary The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis Concrete condition understands the concrete meaning of above-mentioned term in the present invention.

Embodiment:

Fig. 1 is a structural representation of the connection structure of ring gear and one-way clutch provided by the embodiment of the utility model Figure, Fig. 2 is another structural schematic diagram of the connection structure of ring gear and one-way clutch provided by the embodiment of the utility model, Fig. 3 is the schematic cross-sectional view of the connection structure of ring gear and one-way clutch provided by the embodiment of the utility model, please refers to figure 1, the connection structure of Fig. 2 and Fig. 3, ring gear and one-way clutch provided in this embodiment include ring gear and one-way clutch. Ring gear includes the plastics ring gear ontology 1 and metal insert 12 of coaxial arrangement, and one-way clutch includes outer ring 21,22 and of inner ring Rolling supporting structure.

Please continue to refer to Fig. 1 and Fig. 2, plastics ring gear ontology 1 include wheel rim, former and multiple gear teeth, wheel rim, former and The shape of metal insert 12 is that circular and three is coaxially disposed.Side close to wheel rim is provided with multiple gear teeth, multiple wheels Tooth is uniformly arranged in the circumferential direction on the inner peripheral surface of wheel rim, and the gear teeth can be straight-tooth or helical teeth according to specific needs.Wheel rim it is another Side and the side of former connect, and the inner peripheral surface of former is connect with the outer circumference surface of metal insert 12, metal insert 12 it is interior Periphery is connect with the outer circumference surface of outer ring 21, and metal insert 12 and the connection type of outer ring 21 include that interference connect, is keyed With one of pin connection or a variety of.

Specifically, metal insert 12 includes one of machined piece, metallic sintered products and stamping parts or a variety of.

Fig. 4 is the structural schematic diagram of metal insert provided by the embodiment of the utility model, referring to figure 4., metal insert 12 Outer circumference surface on be provided with annular groove 121 and groove 122, annular groove 121 is for preventing plastics ring gear ontology 1 along metal insert 12 Axial float, the outer circumference surface of the radially projecting metal insert 12 of side wall 1211 of annular groove.Groove 122 is for preventing in plastics Gear ring ontology 1 is along the circumferential play of metal insert 12, and the length direction of groove 122 is along the axially extending of metal insert 12.

Please continue to refer to Fig. 4, in a kind of preferred embodiment of the present embodiment, the quantity of annular groove 121 be it is multiple, it is recessed The quantity of slot 122 be it is multiple, annular groove 121 and groove 122 are arranged on the same circumference, and annular groove 121 is embedding along metal with groove 122 The circumferential direction of part 12 is successively arranged alternately.

In a kind of optional embodiment of the present embodiment, the outer circumference surface of metal insert 12 is equipped with an annular groove 121 and several grooves 122, annular groove 121 is arranged on the first circumference, and groove 122 is arranged on the second circumference, the first circumference with The center of circle of second circumference is respectively positioned on the axis of metal insert 12 and is not overlapped.It should be pointed out that the quantity of annular groove 121 may be used also Be it is multiple, the quantity of groove 122 is also possible to multiple, and the present embodiment is not limited.

It should be pointed out that annular groove 121 can use the form of radially projecting 12 outer circumference surface of metal insert, it can also be with Using the form for the outer circumference surface for being radially recessed metal insert 12；Groove 122 can use radially projecting metal insert 12 The form of outer circumference surface, can also be using the form for the outer circumference surface for being radially recessed metal insert 12.It is right according to actual needs The scheme that above-mentioned annular groove 121, the quantity of groove 122, form are combined is in the protection scope of the present embodiment.

Please continue to refer to Fig. 1 and Fig. 2, the outer diameter of former is less than the radius of wheel rim, and former is equipped with the first reinforcement block and the Two reinforcement blocks, the shape of the first reinforcement block are annular shape, and the first reinforcement block and former are coaxially disposed, and the first reinforcement block and former are same Axis, the second reinforcement block are arranged radially along former, and the second reinforcement block is in a strip shape in the side of former, and the second reinforcement block is in former The other side is in triangular shape.

Fig. 5 is the sectional view of one-way clutch provided by the embodiment of the utility model radially, referring to figure 5., unidirectionally from Outer ring 21, inner ring 22 and the rolling supporting structure coaxial arrangement of clutch.

Fig. 6 is the structural schematic diagram of one-way clutch outer ring provided by the embodiment of the utility model, please refers to Fig. 6, outer ring 21 be stamping parts or machined piece, and the inner peripheral surface of outer ring 21 is equipped with multiple circumferentially uniformly distributed curved indentations 211.

Please continue to refer to Fig. 5, in a kind of optional embodiment of the present embodiment, the inner peripheral surface of inner ring 22 is equipped with The keyway 221 axially extended enables inner ring 2 and axis using the form, such as flat key, spline etc. being keyed, fixed to connect It is connected together.In the optional embodiment of another kind of the present embodiment, inner ring 2 is fixed in the form of non-key connection with main shaft Connection, such as interference fit, pin joint etc., at this point, being not provided with slot (not shown) on 2 inner wall of inner ring.Outer ring 21 and inner ring 22 Between be provided with rolling supporting structure.

Rolling supporting structure includes retainer 23, needle roller 24 and spring 25, and retainer 23 is equipped with multiple circumferentially uniform The retention groove of laying, retention groove and curved indentations 211 correspond；A needle roller 24 and one are equipped in each retention groove Spring 25, needle roller 24 and the length direction of spring 25 axially extend；The side of needle roller 24 is arranged in spring 25.It may be noted that , one-way clutch provided in this embodiment uses similar needle bearing structure, with the tradition using roller design unidirectionally from Clutch is compared, and 24 quantity of needle roller is more, diameter is small, more compact radially.

Please continue to refer to Fig. 5, spring 25 is V-arrangement spring, and the open end of V-arrangement spring is towards needle roller 24, the closing of V-arrangement spring End is connect with retainer 23.Alternatively, spring 25 is Z-shaped spring (not shown), and one end and the needle roller 24 of Z-shaped spring connect Touching, the other end of Z-shaped spring are connect with retainer 23.The maximum width of 25 slot of V-arrangement spring is less than the diameter of needle roller 24.It needs to refer to Out, those skilled in the art can also use the spring of other forms according to actual needs, and the present embodiment is not limited.

Please continue to refer to Fig. 5, the radial cross-sectional shape of curved indentations 211 is band intensity gradient curve, the side with intensity gradient curve Close to spring 25, for the other side with intensity gradient curve far from spring 25, the curvature of the side with intensity gradient curve is greater than band intensity gradient curve The other side curvature.

The working principle of one-way clutch is as follows: needle roller 24 is held by 25 pretightning force of spring, guarantee with inner ring 22 and outer ring 21 Continued access touching.Direction is illustrated, when outer ring 21 is fixed, when inner ring 22 has rotating tendency counterclockwise, clutch is locked, at this time Internal and external cycle 21 cannot rotate relative to each other, otherwise have relative rotation；When inner ring 22 is fixed, when outer ring 21 rotates clockwise trend, clutch Locking, Internal and external cycle 21 cannots rotate relative to each other at this time, otherwise has relative rotation.

In a kind of optional embodiment of the present embodiment, outer ring 21 and the inseparable integral structure of inner ring 22. One-way clutch further includes axially disposed left baffle and right baffle (not shown), and right baffle-plate is arranged in inner ring 22 1 The other side of inner ring 22 is arranged in side, right shell body, and left baffle and right baffle is for clamping inner ring 22.Due to subtracting for 24 diameter of needle roller Small, the flange of outer ring 21 rubs with the end face of inner ring 22 and also reduces than traditional one-way clutch, is conducive to reduce moment of friction, prolong Long life.

In a kind of preferred embodiment of the present embodiment, outer ring 21 and inner ring 22 are separate structure, due to using In the case where 21 unpack format of Internal and external cycle, one-way clutch no setting is required baffle, it is thus possible to avoid baffle and inner ring 22 completely Friction.

The present embodiment has the advantages that

1, the present embodiment uses metal insert form ring gear, and ring gear ontology is plastic material, and metal insert can be machine Workpiece, metallic sintered products, stamping parts etc., weight is lighter compared with using ring gear made of metalwork in the prior art, with It is more preferable compared to intensity using ring gear made of plastic part in the prior art.

2, the present embodiment uses the needle-type one-way clutch of similar needle bearing structure, and needle roller quantity is more, diameter is small, diameter To compact, be conducive to reduce moment of friction, prolong the service life.

3, the present embodiment is connect using the ring gear of metal insert form with needle-type one-way clutch, overall weight gently, One-way clutch friction is small, and cycling sense is more preferable.

Embodiment:

Fig. 7 is the schematic cross-sectional view provided by the embodiment of the utility model with gear hub motor, please refers to Fig. 7, this implementation The small hyper tape gear hub motor of bicycle that example provides, the connection with ring gear and one-way clutch disclosed in above-described embodiment Structure.

Specifically, the small hyper tape gear hub motor of bicycle provided in this embodiment includes main shaft, is installed in rotation on Hub shell on the main shaft, the driving mechanism being arranged in inside hub shell and gear reduction.Preferably, outside wheel hub The left side of shell is equipped with outlet hole, and the left side of hub shell and hub shell are overall structures.

Alternatively, end cap is provided on the left of hub shell, end cap is equipped with outlet hole, and end cap is connect with hub shell (not shown).

Motor power-supply wire enters the inner cavity of hub shell after passing through the outlet hole, and connects with the winding terminal of inner stator It connects.

Driving mechanism includes the motor stator and rotor of coaxial arrangement, and motor stator is fixedly mounted on main shaft, electricity Machine rotor includes rotor portions and shaft sleeve part, and rotor portions pass through bearing support and are mounted on main shaft, the inner ring and main shaft of shaft sleeve part Clearance fit.Wherein, rotor portions and shaft sleeve part are integrally formed, and are advantageously reduced amount of parts, are improved the position of rotor bearing The concentricity with sun gear is set, to improve overall performance.

Gear reduction includes one-way clutch, compound planet gear, planet carrier component, gear ring component and sun gear, Connection relationship between each component of gear reduction is summarized as follows: sun gear is set in the shaft sleeve part outer ring of outer rotor, too Sun wheel is fixedly connected with shaft sleeve part by connector.Ring gear and one-way clutch are coaxially disposed, the plastics ring gear of ring gear Ontology 11 and metal insert 12 are molded into integral structure, and the metal insert 12 of ring gear and the outer ring 21 of one-way clutch connect It connects, adoptable connection type includes key connection, interference fit and pin connection etc..Using ring gear disclosed in above-described embodiment With the connection structure of one-way clutch, be conducive to mitigate overall weight, reduce one-way clutch friction, thus obtain it is good from Driving is ridden sense.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means particular features, structures, materials, or characteristics described in conjunction with this embodiment or example It is contained at least one embodiment or example of the utility model.In the present specification, schematic expression of the above terms It need not be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office What can be combined in any suitable manner in one or more embodiment or examples.In addition, those skilled in the art can will be in this specification The different embodiments or examples of description are engaged and are combined.

Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model It is interior above-described embodiment can be changed, modifications and variations.

Claims (10)

1. the connection structure of a kind of ring gear and one-way clutch, which is characterized in that including ring gear and one-way clutch；

The ring gear includes the plastics ring gear ontology (11) and metal insert (12) of coaxial arrangement, the one-way clutch packet Include outer ring (21), inner ring (22) and the rolling supporting structure of coaxial arrangement；

The inner peripheral surface of the plastics ring gear ontology (11) is connect with the outer circumference surface of the metal insert (12), the metal The inner peripheral surface of inserts (12) is connect with the outer circumference surface of the outer ring (21), and the inner peripheral surface of the outer ring (21) is equipped with more A circumferentially uniformly distributed curved indentations (211)；The rolling supporting structure is arranged in the outer ring (21) and the inner ring (22) between.

2. connection structure according to claim 1, which is characterized in that the metal insert (12) and the outer ring (21) Connection type includes one of interference connection, key connection and pin connection or a variety of.

3. connection structure according to claim 1, which is characterized in that be arranged on the outer circumference surface of the metal insert (12) There are annular groove (121) and groove (122)；

The annular groove (121) is for preventing the plastics ring gear ontology (11) along the axial float of the metal insert (12)；

The groove (122) is for preventing the plastics ring gear ontology (11) along the circumferential play of the metal insert (12).

4. connection structure according to claim 3, which is characterized in that the radially projecting institute of side wall (1211) of the annular groove State the outer circumference surface of metal insert (12).

5. connection structure according to claim 3, which is characterized in that the annular groove (121) and the groove (122) are arranged On the same circumference, circumferential direction of the annular groove (121) with the groove (122) along the metal insert is successively arranged alternately； Alternatively, the annular groove (121) is arranged on different circumference from the groove (122).

6. connection structure according to claim 1, which is characterized in that the metal insert includes machined piece, powder smelting One of golden part and stamping parts are a variety of.

7. connection structure according to claim 1, which is characterized in that the radial cross-sectional shape of the curved indentations (211) For band intensity gradient curve, the curvature of the side with intensity gradient curve is greater than the curvature of the other side with intensity gradient curve.

8. connection structure according to claim 1, which is characterized in that the rolling supporting structure include retainer (23), Needle roller (24) and spring (25), the retainer (23) are equipped with multiple circumferentially uniformly distributed retention grooves, the retention groove It is corresponded with the curved indentations (211)；

Be equipped with the needle roller (24) and a spring (25) in each retention groove, the needle roller (24) with The length direction of the spring (25) axially extends；

The spring (25) is arranged in the side of the needle roller (24), and the curved surface corresponding with the side of the needle roller (24) The cross section curve radius of groove (211) is less than cutting for the curved indentations (211) corresponding with the other side of the needle roller (24) Surface curve radius.

9. connection structure according to claim 8, which is characterized in that the spring (25) is V-arrangement spring, the V-arrangement bullet The open end of spring is connect towards the needle roller (24), the closed end of the V-arrangement spring with retainer (23)；

Alternatively, the spring (25) is Z-shaped spring, one end of the Z-shaped spring is contacted with the needle roller (24), the Z-shaped bullet The other end of spring is connect with the retainer (23).

10. connection structure according to claim 1, which is characterized in that the outer ring (21) and the inner ring (22) can not Separation, alternatively, the outer ring (21) and the inner ring (22) are separate structure.