CN208698998U - Transmission ratio bottom bracket shell device in a kind of single speed - Google Patents

Abstract

The utility model discloses transmission ratio bottom bracket shell devices in a kind of single speed, including main shaft, pinion frame, tooth set and planetary gear construction, the tooth set fixed setting, and the tooth set inner wall is equipped with tooth socket, the planetary gear construction includes the planetary gear being rotatably installed on the pinion frame and engages the central gear shaft of connection with the planetary gear, the planetary gear is engaged between the tooth set and the central gear shaft, the central gear shaft is set on the main shaft, is fixedly installed with sprocket wheel on the central gear shaft.The utility model may be implemented to accomplish even if sprocket wheel sufficiently small, can also have enough transmission ratios, to have enough revolving speeds so that Moped Scooter or bicycle can accomplish it is more succinct, generous, beautiful.

Description

Transmission ratio bottom bracket shell device in a kind of single speed

Technical field

The utility model relates to bicycle and Moped Scooter technical fields, and in particular to a kind of single speed.

Background technique

For Moped Scooter in order to reach at low cost, small in size, wheel footpath is generally smaller in the market, so in order to realize High transmission ratio allows it to the riding speed for reaching big wheel footpath vehicle, the tooth that most of Moped Scooter on existing market uses Disk is generally larger, at the same traditional functional small wheel bicycle be also in this way, this status significantly limit Moped Scooter and The development and design of standard bicycle.

With the development of economy, social progress, Green Travel have become certainty and social consensus.Moped Scooter because Lower than electric vehicle light weight and cost, small in size, the brief fashion of shape, increasingly by the approval of people.But the prior art In Moped Scooter can not meet These characteristics simultaneously because once accomplishing that light weight and cost is low, small in size, chain wheel is just Can be bigger, it will affect appearance at this time, so that not can be implemented simultaneously the breakthrough in shape, there are inaesthetic defects for shape.

Occur on the market without chain wheel bicycle designs, such as rub and visit 2 generation bicycles etc., this kind of bicycle is driven with axis Instead of chain drive, although it realizes no chain wheel bicycle, its transmission ratio is small cannot to apply to small-wheel-diameter vehicle, loss of machine of torque Greatly, its structure is complicated increases many costs and weight.Other types of functional small wheel bicycle exists with aforementioned electric boosted The larger problem of vehicle chain wheel.

Utility model content

In view of the deficiencies of the prior art, the utility model provides transmission ratio bottom bracket shell device in a kind of single speed, for solving The transmission ratio problem of Moped Scooter or bicycle in the prior art, so that also having in the case where chain wheel accomplishes sufficiently small Standby enough transmission ratios, to improve appearance.

For this purpose, embodiment according to the present utility model, transmission ratio bottom bracket shell device includes: in the single speed

The end of main shaft, the main shaft is connected to pedal；

Pinion frame, the pinion frame are fixedly mounted on the main shaft, so that the same institute of the pinion frame Main shaft is stated to rotate together；

Tooth set, the tooth set fixed setting, and tooth set inner wall is equipped with tooth socket；And

Planetary gear construction, the planetary gear construction include the planetary gear being rotatably installed on the pinion frame And the central gear shaft of connection is engaged with the planetary gear, the planetary gear is engaged on the tooth set and the sun gear Between axis, the central gear shaft is set on the main shaft, is fixedly installed with sprocket wheel on the central gear shaft.

As the further optinal plan of transmission ratio bottom bracket shell device in the single speed, the main shaft includes left axle and right axle, The both ends of the right axle are equipped with threaded hole, and the left axle is equipped with along its axial through-hole, and the left axle is bolted to institute The left end of right axle is stated, the pedal is connected to the left end of the left axle and the right end of the right axle.

As the further optinal plan of transmission ratio bottom bracket shell device in the single speed, the pinion frame includes being set in First sleeve on the main shaft and the second sleeve being set on the central gear shaft, the first sleeve and described second Connecting rod is equipped between sleeve, the first sleeve, the second sleeve and the connecting rod surround notch, the planetary gear It is mounted on the indentation, there, and protrudes the notch.

As the further optinal plan of transmission ratio bottom bracket shell device in the single speed, the first sleeve with described second set Cylinder is equipped with mounting hole at relative position, is equipped with planetary gear shaft in the mounting hole, and the planetary gear rotation is mounted on institute It states in planetary gear shaft.

As the further optinal plan of transmission ratio bottom bracket shell device in the single speed, the first sleeve and/or described Mounting hole in two sleeves is threaded hole, machine-processed rice screw is equipped in the threaded hole, for limiting the planetary gear shaft Position.

As the further optinal plan of transmission ratio bottom bracket shell device in the single speed, in the left axle and the right axle respectively It is correspondingly provided with left bearing and right bearing, end cap is additionally provided in the left axle, the left bearing is arranged in the end cap and the row Between gear rack, the right side of the central gear shaft has opening, and the right axle is equipped with a shaft shoulder, the right bearing setting Between the shaft shoulder and the central gear shaft, and accommodate in the opening.

As the further optinal plan of transmission ratio bottom bracket shell device in the single speed, the peripheral wall of the end cap is equipped with outer spiral shell Line is equipped with shell on the external screw thread, and the tooth set is fixed at the inner wall of the shell.

It further include dustproof cover as the further optinal plan of transmission ratio bottom bracket shell device in the single speed, the dustproof cover It is set in the periphery of the shell and tooth set.

As the further optinal plan of transmission ratio bottom bracket shell device in the single speed, the tooth set and the central gear shaft Between be equipped with steel ball so that the tooth set, the central gear shaft and the steel ball form bowl group.

As the further optinal plan of transmission ratio bottom bracket shell device in the single speed, the central gear shaft is equipped with recessed Slot, the sprocket wheel are equipped with the protrusion with the matching grooves, are additionally provided with spacing collar in the groove, pass through the fixation of spacing collar So that the central gear shaft is fixed together with the sprocket wheel.

The utility model has the beneficial effects that

According to transmission ratio bottom bracket shell device in the single speed in above embodiments, due to the setting of main shaft, pinion frame, so that When human body step on pedal advance when, can main shaft be rotated forward, then pinion frame be rotated forward, simultaneously because The setting of tooth set and planetary gear construction, and the planetary gear rotation in planetary gear construction is mounted on pinion frame, and Planetary gear is engaged between tooth set and central gear shaft, along with the fixed setting of tooth set, planetary gear can be made along tooth It covers and rotates backward, then central gear shaft is rotated forward, final band movable sprocket rotates forward.In above process, chain The velocity of rotation of wheel covers the gear ratio with central gear shaft by tooth to determine, and unrelated with the size of sprocket wheel, at this time by reasonable Setting tooth set sprocket wheel may make with corresponding revolving speed, to realize and accomplish foot even if sprocket wheel with the gear ratio of central gear shaft It is enough small, can also have enough transmission ratios, to have enough revolving speeds, so that Moped Scooter or bicycle can Accomplish more succinct, generous, beautiful.

Detailed description of the invention

It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also To obtain other relevant attached drawings according to these attached drawings.

Fig. 1 shows the shape of transmission ratio bottom bracket shell device in a kind of single speed according to provided by the utility model embodiment Figure；

Fig. 2 shows the section views of transmission ratio bottom bracket shell device in a kind of single speed according to provided by the utility model embodiment Figure；

Fig. 3 shows transmission ratio bottom bracket shell device in a kind of single speed according to provided by the utility model embodiment and removes shell Structural schematic diagram；

Fig. 4 shows transmission ratio bottom bracket shell device in a kind of single speed according to provided by the utility model embodiment and removes planet The structural schematic diagram of tooth rest；

Fig. 5 shows transmission ratio bottom bracket shell device in a kind of single speed according to provided by the utility model embodiment and removes tooth set Structural schematic diagram；

Fig. 6 show transmission ratio bottom bracket shell device in a kind of single speed according to provided by the utility model embodiment remove it is outer The structural schematic diagram of shell, pinion frame and tooth set；

Fig. 7 shows the planet tooth of transmission ratio bottom bracket shell device in a kind of single speed according to provided by the utility model embodiment The structural schematic diagram of wheel carrier；

Fig. 8 shows the tooth set of transmission ratio bottom bracket shell device in a kind of single speed according to provided by the utility model embodiment Structural schematic diagram.

Main element symbol description:

100- main shaft；200- pinion frame；300- tooth set；400- planetary gear construction；500- sprocket wheel；600- left axle It holds；700- right bearing；800- end cap；900- shell；1000- dustproof cover；1100- steel ball；1200- spacing collar；110- left axle； 120- right axle；130- bolt；210- first sleeve；220- second sleeve；230- connecting rod；240- notch；250- planetary gear Axis；260- fastener；410- planetary gear；420- central gear shaft；510- protrusion；810- limiting section；The 121- shaft shoulder；211- installation Hole；421- opening；422- groove.

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, and is only used 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 " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is based on the figure Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model Limitation.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention, More than, 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, it may be being fixedly connected, may be a detachable connection, or integral；It can be Mechanical connection, is also possible to be electrically connected；It can be directly connected, 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.

In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down " It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.

Embodiment

Present embodiments provide transmission ratio bottom bracket shell device in a kind of single speed.

Please refer to Fig. 1-5, in the single speed transmission ratio bottom bracket shell device include main shaft 100, pinion frame 200, tooth set 300 and Planetary gear construction 400.

Wherein, the end of main shaft 100 is connected to pedal.Pinion frame 200 is fixedly mounted on main shaft 100, so that row Gear rack 200 is rotated together with main shaft 100.300 fixed setting of tooth set, and tooth covers 300 inner walls and is equipped with tooth socket.Planetary gear knot Structure 400 includes the planetary gear 410 being rotatably installed on pinion frame 200 and the sun that connection is engaged with planetary gear 410 Gear shaft 420, planetary gear 410 are engaged between tooth set 300 and central gear shaft 420, and central gear shaft 420 is set in main shaft On 100, sprocket wheel 500 is fixedly installed on central gear shaft 420.

In this way, due to the setting of main shaft 100, pinion frame 200, so that can make when human body is when stepping on pedal advance It obtains main shaft 100 to rotate forward, rotates pinion frame 200 forward, simultaneously because tooth set 300 and planetary gear construction 400 setting, and the planetary gear 410 in planetary gear construction 400 is rotatably installed on pinion frame 200, and planet tooth Wheel 410 is engaged between tooth set 300 and central gear shaft 420, along with the fixed setting of tooth set 300, can make planetary gear 410 rotate backward along tooth set 300, rotate central gear shaft 420 forward, and final band movable sprocket 500 is to forward It is dynamic.In above process, the velocity of rotation of sprocket wheel 500 is determined by tooth set 300 with the gear ratio of central gear shaft 420, and with The size of sprocket wheel 500 is unrelated, and tooth set 300 and the gear ratio of central gear shaft 420 may make chain through reasonable settings at this time Wheel 500 has corresponding revolving speed, realizes and accomplishes even if sprocket wheel 500 sufficiently small, can also have enough transmission ratios, to have Enough revolving speeds so that Moped Scooter or bicycle can accomplish it is more succinct, generous, beautiful.

It should be noted that in single speed in the utility model embodiment transmission ratio bottom bracket shell device not only can be used in Wheel footpath described in background technique small Moped Scooter or bicycle, at this time by the way that the number of teeth of tooth set 300 to be arranged to The reasonable multiple of the number of teeth of central gear shaft 420, even if so that even if sprocket wheel 500 accomplish it is sufficiently small, it may have it is enough Transmission ratio has enough revolving speeds.

Certainly, in addition to the above, transmission ratio bottom bracket shell device can also make in the single speed in the utility model embodiment For the biggish Moped Scooter of wheel footpath or bicycle, reasonable disposition tooth covers 300 number of teeth and central gear shaft 420 at this time The relationship of the number of teeth.

Referring to Figure 6, main shaft 100 includes left axle 110 and right axle 120, right axle in the utility model embodiment 120 both ends are equipped with threaded hole, and left axle 110 is equipped with along its axial through-hole, and left axle 110 is connected to right axle 120 by bolt 130 Left end, pedal is connected to the left end of left axle 110 and the right end of right axle 120.

Specifically, in practical operation, by by bolt 130 along left axle 110 by passing through left axle 110 until screwing in The connection of the two can be realized into the threaded hole of right axle 120, pedal is just fastened to a left side for left axle 110 in above process End.Similarly, another pedal can be fastened on to the right end of right axle 120 by another bolt 130.

Specifically, right axle 120 be equipped with along its axially through internal thread hole, in left axle 110 be equipped with in right axle 120 The blind hole of threaded hole docking, at this time by the way that bolt 130 is passed through its internal thread hole along right axle 120 and is screwed into place in left axle The connection of the two can be completed in blind hole on 110.

Referring to Figure 7, pinion frame 200 includes being set on main shaft 100 in the utility model embodiment First sleeve 210 and the second sleeve 220 that is set on central gear shaft 420, first sleeve 210 and second sleeve 220 it Between be equipped with connecting rod 230, first sleeve 210, second sleeve 220 and connecting rod 230 surround notch 240, and planetary gear 410 is installed At notch 240, and protrude the notch 240.

As a result, when main shaft 100 rotates, first sleeve 210 will be with main shaft 100 with second sleeve 220 and rotate together, Since planetary gear 410 is mounted at the notch 240 between first sleeve 210 and second sleeve 220, and the notch 240 is protruded, Planetary gear 410 is engaged with tooth set 300 and central gear shaft 420, to realize central gear shaft 420 according to process Rotation.

Specifically, referring to FIG. 2, the first sleeve 210 of above-mentioned pinion frame 200 is fixedly mounted in left axle 110, And right axle 120 is stretched to, so that second sleeve 220 is in the top of right axle 120, it is equipped between second sleeve 220 and right axle 120 Central gear shaft 420 is equipped with tooth set 300 in the periphery of second sleeve 220, in this way when planetary gear 410 is installed to planet tooth When at the notch 240 on wheel carrier 200, planetary gear 410 is between tooth set 300 and central gear shaft 420.

With continued reference to FIG. 7, in order to realize installation of the planetary gear 410 on pinion frame 200, in first sleeve 210 with 220 relative position of second sleeve at be equipped with mounting hole 211, in mounting hole 211 be equipped with planetary gear shaft 250, planet tooth Wheel 410 is rotatably installed in planetary gear shaft 250.

In this way, being set in planetary gear shaft 250 when installing planetary gear 410.

Further, in order to prevent movement of the planetary gear shaft 250 in above-mentioned mounting hole 211 and influence planetary gear 410 rotation, the mounting hole 211 in first sleeve 210 and/or second sleeve 220 are threaded hole, and card is equipped in threaded hole Part 260, for limiting the position of planetary gear shaft 250.

For example, in the example shown in figure 2, the mounting hole 211 in first sleeve 210 is threaded hole, and in the Mounting hole 211 in two sleeves 220 is blind hole, in this way before installing planetary gear shaft 250, has externally threaded fastener for one 260, such as the precessions such as machine-processed rice screw first sleeve 210, then planetary gear shaft 250 is installed into first sleeve 210 and second set Between cylinder 220, planetary gear shaft 250 is limited by machine-processed rice screw and the bottom of the blind hole in second sleeve 220 at this time, is kept away Exempt from planetary gear shaft 250 and mobile possibility occurs.

With continued reference to FIG. 2, being respectively corresponded in left axle 110 and right axle 120 in the utility model embodiment and being equipped with a left side Bearing 600 and right bearing 700, end cap 800 is additionally provided in left axle 110, and left bearing 600 is arranged in end cap 800 and pinion frame Between 200, the right side of central gear shaft 420 has opening 421, and right axle 120 is equipped with a shaft shoulder 121, and the setting of right bearing 700 exists Between the shaft shoulder 121 and central gear shaft 420, and it is accommodated in opening 421.

Specifically, in the limiting section 810 that the inside of end cap 800 matches equipped with the shape of one and left bearing 600, and go The outer dimension of the first sleeve 210 of gear rack 200 is greater than the size of left axle 110 again, allow in this way left bearing 600 by The limiting section 810 of end cap 800 and the limitation of first sleeve 210.

At this time it is understood that passing through above-mentioned left axle 110, first sleeve 210, end cap 800, right axle 120 and planet tooth The design of the structure and size of the setting of wheel carrier 200, so that do not need can be good by other any parts for bearing It limits, so that transmission ratio bottom bracket shell device structure is simple and compact in the single speed in the utility model embodiment.

Further, Fig. 1-3 is please referred to, the peripheral wall of end cap 800 is equipped with external screw thread, shell 900 is equipped on external screw thread, Tooth set 300 is fixed at the inner wall of shell 900.

It in this way, the setting by shell 900 can protect all parts inside shell 900, while being tooth set 300 immobilization installation provides basis.

It is understood that tooth set 300 can by being clamped, being spirally connected, bolt connection etc. various ways and be fixedly mounted outside The inner wall of shell 900.

In some embodiments, referring to FIG. 2, being additionally provided with dustproof cover 1000 in the periphery of shell 900 and tooth set 300, The presence of the dustproof cover 1000 is beneficial to prevent dust etc. and enters 900 inside of shell and influence the engagement between each gear and move Make.

With continued reference to FIG. 2, in order to guarantee central gear shaft 420 can smooth, stable rotation, tooth set 300 with too Steel ball 1100 is equipped between positive gear shaft 420, so that tooth set 300, central gear shaft 420 and steel ball 1100 form bowl group.

In addition, sprocket wheel 500 is fixedly installed on central gear shaft 420 in order to realize, can be set on central gear shaft 420 Fluted 422, and sprocket wheel 500 be equipped with the matched protrusion 510 of groove 422, while groove 422 in be equipped with spacing collar 1200, By the fixation of spacing collar 1200 so that central gear shaft 420 is fixed together with sprocket wheel 500.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into Row combination and combination.

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 Inside it can make changes, modifications, alterations, and variations to the above described embodiments.

Claims (10)

1. transmission ratio bottom bracket shell device in a kind of single speed characterized by comprising

The end of main shaft, the main shaft is connected to pedal；

Pinion frame, the pinion frame are fixedly mounted on the main shaft, so that the pinion frame is the same as the master Axis rotates together；

Tooth set, the tooth set fixed setting, and tooth set inner wall is equipped with tooth socket；And

Planetary gear construction, the planetary gear construction include the planetary gear being rotatably installed on the pinion frame and with The central gear shaft of planetary gear engagement connection, the planetary gear be engaged on the tooth set and the central gear shaft it Between, the central gear shaft is set on the main shaft, is fixedly installed with sprocket wheel on the central gear shaft.

2. transmission ratio bottom bracket shell device in single speed as described in claim 1, which is characterized in that the main shaft includes left axle and the right side Axis, the both ends of the right axle are equipped with threaded hole, and the left axle is equipped with along its axial through-hole, and the left axle is bolted to The left end of the right axle, the pedal are connected to the left end of the left axle and the right end of the right axle.

3. transmission ratio bottom bracket shell device in single speed as described in claim 1, which is characterized in that the pinion frame includes being arranged In the first sleeve on the main shaft and the second sleeve being set on the central gear shaft, the first sleeve and described the Connecting rod is equipped between two sleeves, the first sleeve, the second sleeve and the connecting rod surround notch, the planet tooth Wheel is mounted on the indentation, there, and protrudes the notch.

4. transmission ratio bottom bracket shell device in single speed as claimed in claim 3, which is characterized in that the first sleeve and described second It is equipped with mounting hole at sleeve relative position, is equipped with planetary gear shaft in the mounting hole, the planetary gear rotation is mounted on In the planetary gear shaft.

5. transmission ratio bottom bracket shell device in single speed as claimed in claim 4, which is characterized in that the first sleeve and/or described Mounting hole in second sleeve is threaded hole, machine-processed rice screw is equipped in the threaded hole, for limiting the planetary gear shaft Position.

6. transmission ratio bottom bracket shell device in single speed as claimed in claim 2, which is characterized in that divide in the left axle and the right axle Be not correspondingly provided with left bearing and right bearing, be additionally provided with end cap in the left axle, the left bearing setting the end cap with it is described Between pinion frame, the right side of the central gear shaft has opening, and the right axle is equipped with a shaft shoulder, and the right bearing is set It sets between the shaft shoulder and the central gear shaft, and accommodates in the opening.

7. transmission ratio bottom bracket shell device in single speed as claimed in claim 6, which is characterized in that the peripheral wall of the end cap is equipped with outer spiral shell Line is equipped with shell on the external screw thread, and the tooth set is fixed at the inner wall of the shell.

8. transmission ratio bottom bracket shell device in single speed as claimed in claim 7, which is characterized in that it further include dustproof cover, it is described dust-proof Lid is set in the periphery of the shell and tooth set.

9. transmission ratio bottom bracket shell device in single speed as described in claim 1, which is characterized in that the tooth set and the sun gear Steel ball is equipped between axis, so that the tooth set, the central gear shaft and the steel ball form bowl group.

10. transmission ratio bottom bracket shell device in single speed as described in claim 1, which is characterized in that the central gear shaft is equipped with Groove, the sprocket wheel are equipped with the protrusion with the matching grooves, are additionally provided with spacing collar in the groove, pass through consolidating for spacing collar Determine so that the central gear shaft is fixed together with the sprocket wheel.