CN2113241U - Speed-transmission for bottom bracket bearing of bicycle - Google Patents
Speed-transmission for bottom bracket bearing of bicycle Download PDFInfo
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- CN2113241U CN2113241U CN 91222773 CN91222773U CN2113241U CN 2113241 U CN2113241 U CN 2113241U CN 91222773 CN91222773 CN 91222773 CN 91222773 U CN91222773 U CN 91222773U CN 2113241 U CN2113241 U CN 2113241U
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Abstract
The utility model relates to a speed changing device for a middle shaft of a bicycle, which belongs to the field of bicycle and man-power tricycle engineering. The utility model is skillfully designed by utilizing gear speed changing principle, and is widely used for various bicycles and man-power tricycles. The speed changing device is mainly composed of a main shaft, a secondary shaft, a gear, a gear shifting mechanism and a casing. The utility model is characterized in that the secondary shaft is made into an eccentric structure, the gear is released when gears are shifted, therefore the utility model realizes gear shifting without impact; due to the adoption of the gear shifting mechanism with a spiral regulating sleeve, the utility model has the advantages of accurate gear shifting and no gear blocking phenomenon; because the utility model is provided with the structures of a restoring spring for the spiral regulating sleeve and a plate rod of an eccentric shaft, the utility model jumps back to the common-speed gear from any one gear. The utility model has the advantages of simple structure, small size and strong practicability.
Description
Bicycle middle shaft speed-changing device belongs to bicycle, manual tricycle engineering field.It utilizes gear change former, designs through ingenious, makes the further practicability of shift bicycle, can be widely used in various bicycle and manual tricycle.
Existing bicycle shifting apparatus, generally can be divided into two classes: a class is the gear shift a plurality of arranged side by side (or a plurality of wheel disc shift) that utilizes on the trailing wheel; Another kind of is to utilize axis gear case shift.The former is because ⅰ) combination gear is more, is subjected to crossfoot cun restriction, and wheel sheet system very thin is not durable; ⅱ) shift steering unit complex structure is prone to the phenomenon of botching routines; ⅲ) gear shift mechanism, shelves wheel expose, and are not easy to, flexible objects long in tail-bracket band fortune, and its application is restricted; Though the latter utilizes gear change, shift moment often occurs to enter the mutual percussion of gears in mesh, and be prone to disorderly shelves fault.
According to above-mentioned analysis, propose the purpose of this utility model and be: overcome existing change gear transmission easily disorderly shelves and shift moment enter the defective of the mutual percussion of the gears in mesh gear teeth, make the further practicability of this transmission system, structure rationalization.
Bicycle middle shaft speed-changing device mainly is made up of main shaft (bicycle middle shaft), two (driven shaft), a plurality of gear, housing etc.It is characterized in that: be provided with spiral gear shift mechanism, shift accurately, random shelves; Make eccentric structure for two, gear shift moment phase grinding tooth wheel is thrown off, gear shift is smooth, no gear teeth percussion phenomenon; Be provided with the screw-casing return spring, gear bayonet lock and return normal fast plate washer bar is pulled this bar, arbitrarily the equal direct normal speed of rebound grade of shelves.
Its working process is as follows: when the need shift, the torque arm of pulling shift, by being fixed in the shift pulling block on the shift axle, stir the adjustable diameter and screw adjusting cover, make it to rotate a certain angle, the shift fork axially moves a segment distance along the adjustable diameter and screw adjusting cover simultaneously, and the shift fork end is stuck in the cliding gear groove that is loaded on the main shaft, so cliding gear and fork are synchronized with the movement, thereby realize the shift process; In the moment that shift finishes, the bayonet lock on the bayonet lock seat snaps in the hook tooth of adjustable diameter and screw adjusting cover right-hand member under its action of the spring, realizes the gear locking.When pulling the shift torque arm, the arc that is fixed in the shift axle other end rotates thereupon, and the positioning plate that two left ends are fixed in promotion rotates a certain angle, because two is accentric, so drive gear and reaction gear jump out of mesh on it, make the mainshaft sliding gear classless shifting.When need recover normal speed, the plate stem of two right-hand members is fixed in pulling, all engaging gear jump out of meshs, the pin plate of carrying that is fixed in two right-hand members simultaneously rotates thereupon, by its cambered surface bayonet lock is mentioned, under the effect of pull back spring, the adjustable diameter and screw adjusting cover goes back to virgin state, and promptly this shifting apparatus recovers normal fast state (being equivalent to existing no shift bicycle).
Therefore, this device possesses following characteristics: a) two are adopted eccentric structure, and shift all phase grinding tooth wheels (or entering gears in mesh) of moment are thrown off, and have avoided the percussion of gear shift wheel, have prolonged the service life of gear; B) owing to take adjustable diameter and screw adjusting nested structure and gear bayonet lock structure,, do not have random shelves and hang the phenomenon that does not perform so gear shift is accurate; C) owing to be provided with and return normal fast gear mechanism, simplified operation toward the equal direct normal speed of rebound grade of a gear; D) this device is only established four gears, and simple in structure, volume is little, and is practical.
The utility model has following accompanying drawing:
Accompanying drawing 1 is the utility model mounting structure principle expansion drawing.
Accompanying drawing 2 is the lateral plan of the utility model positioning plate.
Accompanying drawing 3 is the lateral plan of the utility model arc.
Accompanying drawing 4 is the mated condition figure of the utility model bayonet lock seat and bayonet lock.
Accompanying drawing 5 is carried the lateral plan of pin plate for the utility model.
Accompanying drawing 6 is the lateral plan of the utility model adjustable diameter and screw adjusting cover right-hand member ratchet.
Accompanying drawing 7 is the structure enlarged drawing of the utility model shift shifting block.
Accompanying drawing 8 is the utility model gear mesh assembling scheme drawing.
Accompanying drawing 9 is the lateral plan of Fig. 1.
In the accompanying drawing 1: 1, main shaft fourth speed gear; 2, mainshaft sliding gear; 3, the normal speed shelves of main shaft gear; 4, gear 3 block bearings; 5, main shaft supporting bearing; 6, wheel flange; 7, main shaft supporting bearing; 8, shift pulling block; 9, shift torque arm; 10, fork; 11, shift axle; 12, adjustable diameter and screw adjusting cover; 13, arc; 14, positioning plate; 15, set screw; 16, two three, fourth speed gear, 17 bearings; 18, two one, second speed gear; 19, bayonet lock seat; 20, set screw; 21, plate stem; 22, carry pin plate; 23, main shaft (bicycle middle shaft); 24, two (driven shaft); 25, housing; 26, bayonet lock; 27, bayonet lock spring; 28, shift fork pin.
In conjunction with the accompanying drawings the utility model is described in further detail as follows:
The utility model is by main shaft portion, two shaft portions, gear shift mechanism, gear locking and recover normal fast mechanism, housing etc. and form (see figure 1).
The cliding gear 2 that main shaft portion cooperates with main shaft by fourth speed gear 1 on crank journal of main shaft supporting bearing 5 and 7, sliding sleeve, one grade of gear 3, with the endoporus spline and bearing 4 of supporting gear 3 etc. are formed.Spline is made in main shaft 23 stage casings, and with the endoporus spline fitted of gear 2, gear 2 can slide along main shaft; The main shaft two ends are bearing in respectively on bearing 5 and 7, gear 1 and gear 3 difference sliding sleeves are on the face of cylinder at the spline two ends of main shaft 23, gear 3 is bearing on the housing 25 in the corresponding hole by bearing 4, and gear 3 epitaxial parts are shaped on outside thread, is connected as a single entity with dress wheel flange 6 thereon.
Two shaft portions by two 24, three, fourth gear dual gear 16, one, second gear dual gear 18, bearing 17, positioning plate 14, carry pin plate 22, bayonet lock seat 19, bayonet lock 26, bayonet lock spring 27, plate stem 21 etc. and form.
Make eccentric structure for two 24, gear 16 is housed on its eccentric segment axle journal and the corresponding face of gear 18, two doubly-linked gears is made rectangle tooth embedding structure, it is one that dress closes the back interlock, rotate synchronously, gear 16,18 endoporus with spool between block bearing 17 is housed; On the axle journal of section without acceptance of persons at two 24 two ends, the positioning plate 14 that is fixed with one is housed and carries pin plate 22, carry between pin plate 22 and the gear 18 bayonet lock seat 19 is housed, the plate stem 21 that is being connected on the axle journal that 27, two 24 right-hand members of bayonet lock 26 and bayonet lock spring stretch out the housing outer end is housed in the bayonet lock seat.
Gear shift mechanism is made of shift axle 11, adjustable diameter and screw adjusting cover 12, fork 10, shift fork pin 28, shift shifting block 8, shift torque arm 9, arc 13 etc.Shift axle 11 is loaded in the shift bearing hole on the housing 25, and it is rotatable, the long cylindrical of its stage casing suit one is shaped on the adjustable diameter and screw adjusting cover 12 of spiral chute, and regulating sleeve 12 is made ratchet device with bayonet lock 26 corresponding cylinders, and sidecar system groove matches with the prong of bayonet lock seat 19 in the ratchet; Shift fork 10 with suit on the external cylindrical surface of adjustable diameter and screw adjusting cover 12, it is a sliding fit, fork 10 is provided with silk nail 28, silk nail 28 stretches in the spiral chute that adjustable diameter and screw adjusting puts, and the prong of shift fork 10 inserts in the groove of cliding gear 2, like this, when the rotation of adjustable diameter and screw adjusting cover, just promote shift fork 10 and move axially, driven gear 2 is realized the gear shift effect.Arc 13, shift pulling block 8 are installed in adjustable diameter and screw adjusting respectively and overlap on the shift axle 11 of 12 both sides, and arc 13 cooperates the shift moment effect of grinding tooth wheel disengagement mutually that realizes with positioning plate 14; The dog of shift shifting block 8 left ends inserts in the hook tooth of adjustable diameter and screw adjusting cover right-hand member; Shift axle 11 stretches out on the axle journal of housing 25 right-hand members and is installing shift torque arm 9, pulls this arm and gets final product gear shift.
Recovering normal fast mechanism mainly forms by carrying pin plate 22, plate stem 21, positioning plate 14, arc 13 etc.
Its principle of work is as follows:
When this transmission system is in normal when speed (situation of put in first gear), the cliding gear 2 on the main shaft 23 is positioned at low order end (as Fig. 1), and as Fig. 1, Fig. 8, shown in Figure 9: its miniature gears is nibbled mutually with the internal tooth of gear 3; Gear 1 is nibbled mutually with the miniature gears of gear 16, and the external tooth of gear 3 is nibbled mutually with the miniature gears of gear 18, and this two gears symbol is constant mesh gear; During this grade, the power of axis is directly passed to wheel flange 6 by gear 3, is equivalent to the situation that existing bicycle does not have shift.
When need are hung into second gear, the operator pulls shift torque arm 9, stir adjustable diameter and screw adjusting cover 12 by the dog of shift shifting block 8, make it to rotate a certain angle, under the drive of shift fork pin 28, shift fork 10 is moved to the left vertically, driven gear 2 changes to second grade, at this moment, the miniature gears of gear 2 is meshed with the big gear wheel of gear 18, its power transmission process is: the main shaft torque is through the miniature gears of gear 2, the big gear wheel of gear 18, and 18 miniature gears, the gear on the main shaft 3 are passed to wheel flange 6, drives the bicycle freewheel rotation.Its speed ratio is:
(gear 18 rotating speeds)/(gear 2 rotating speeds) * (gear 3 rotating speeds)/(gear 18 rotating speeds)=1/2 * 1/1=1/2
Be that main shaft takes two turns, wheel flange 6 turns around, at a slow speed shelves; In pulling shift torque arm 9, arc 13 is pushed positioning plate 14 open with the co-variation diameter and arc surface on the one hand, and drives the two 24 a certain angles of rotation, because two 24 are accentrics, all throws off so all phase grinding tooths are taken turns and entered engaging gear, realizes no percussion shift; On the other hand, owing to propose the rotation of pin plate 22, cambered surface is mentioned bayonet lock 26 does not altogether influence shift shifting block 8 and stirs 12 rotations of adjustable diameter and screw adjusting cover; When gear shift finishes, loosen shift torque arm 9, make its set back (under effect of pull back spring), at this moment all phase grinding tooths wheel enters engagement, carries pin plate 22 returns, bayonet lock 26 snaps in adjustable diameter and screw adjusting and overlaps in the hook tooth of 12 right-hand members, locking these shelves.
If need to become when going into third gear, by the shift torque arm, make shift fork 10 be moved to the left a gear again, at this moment the bull wheel of gear 2 is meshed with the big gear wheel of gear 16, and the power of main shaft is passed to wheel flange 6 by big gear wheel, the big gear wheel of gear 16, the miniature gears of gear 18, the gear 3 of gear 2.Its speed ratio is:
(gear 16 rotating speeds)/(spindle speed) * (gear 3 rotating speeds)/(gear 18 rotating speeds)=1/1.5 * 1/1=1/1.5
Be main shaft axle 1.5 circles, wheel flange 6 changes 1 circle, is the reduction of speed transmission.
When need are hung into fourth gear, pull shift torque arm 9 once more, gear 2 is further moved to left, at this moment the internal tooth of the engaging-in gear 1 of the bull wheel of gear 2, its power transmission line is: the main shaft torque is passed to gear 1 by the bull wheel of gear 2, through the miniature gears of gear 16, the miniature gears of gear 18 is passed to gear 3 and wheel flange 6 again, drives the bicycle freewheel rotation.Its speed ratio is:
(two shaft gear rotating speeds)/(spindle speed) * (gear 3 rotating speeds)/(gear 18 rotating speeds)=1.5/1 * 1/1=1.5
Be that main shaft circles, wheel flange 16 changeed for 1.5 weeks, and this is the speedup shelves.
No matter which shelves this transmission system is in, if need become normal when shelves speed again, only need pull that tommy bar 21 get final product, at this moment because of: pull tommy bar 21, carry pin plate 22 rotates thereupon, gear locking bayonet lock is mentioned, simultaneously because two eccentric structure is thrown off all phase grinding tooth wheels, under the effect of adjustable diameter and screw adjusting cover return spring, adjustable diameter and screw adjusting cover 12, go back to the initial position, promptly shift fork 10 is pushed gear 2 to least significant (as shown in Figure 1), and the miniature gears of gear 2 is meshed with the internal tooth of gear 3.
The utility model gear is few, and volume is little, and is simple in structure, practical, and the field has a wide range of applications.
Claims (2)
1, a kind of bicycle middle shaft speed-changing device, mainly by main shaft 23, gear 1,2,3,16,18, housing 25 is formed, and it is characterized in that: two 24 are adopted eccentric structure, are provided with adjustable diameter and screw adjusting cover gear shift mechanism, and the gear lockable mechanism returns normal fast gear mechanism; Screw-casing is regulated gear shift mechanism and is made of shift axle 11, adjustable diameter and screw adjusting cover 12, shift fork 10, shift pulling block 8, shift torque arm 9, arc 13 etc., adjustable diameter and screw adjusting cover 12 is placed on the shift axle 11, fork 10 is placed on the adjustable diameter and screw adjusting cover 12, be running-fit, shift pulling block 8, shift torque arm 9, arc 13 all are connected with shift axle 11; Ratchet that the shift lockable mechanism mainly overlaps 12 right-hand members by bayonet lock seat 19, bayonet lock 26, bayonet lock spring 27, adjustable diameter and screw adjusting etc. constitutes, one end of bayonet lock seat 19 is loaded on the garden of the section without acceptance of persons cylinder of two 24 right-hand members, the other end snaps in adjustable diameter and screw adjusting and overlaps in the circumferential recess of 12 right-hand members, bayonet lock 26 is loaded on agreeing in the hole mutually on the bayonet lock seat 19, and presses to ratchet by spring 27; Return normal fast gear mechanism, mainly by carry pin plate 22, plate stem 21 constitutes, the two all is fixed on the non-eccentricity section cylinder of two right-hand members.
2, bicycle middle shaft speed-changing device according to claim 1 is characterized in that: eccentric structure is made in two 24 stage casings (cogged section); Close right-hand member car system one groove of adjustable diameter and screw adjusting cover 12, the short column face on groove right side is made ratchet, has spiral chute on the oval cylinder in groove left side, and corresponding each gear of bottom land is drilled with the pelletized shape pit; The pin cambered surface of carrying of carrying pin plate 22 is a function surface; The cambered surface of arc 13 is the reducing cambered surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91222773 CN2113241U (en) | 1991-12-06 | 1991-12-06 | Speed-transmission for bottom bracket bearing of bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91222773 CN2113241U (en) | 1991-12-06 | 1991-12-06 | Speed-transmission for bottom bracket bearing of bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2113241U true CN2113241U (en) | 1992-08-19 |
Family
ID=4929599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91222773 Granted CN2113241U (en) | 1991-12-06 | 1991-12-06 | Speed-transmission for bottom bracket bearing of bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2113241U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102030073A (en) * | 2010-12-10 | 2011-04-27 | 徐志安 | Centre shaft four-speed transmission for bicycle |
| CN103718685A (en) * | 2012-10-13 | 2014-04-16 | 陈茂寅 | Pivot steering control device |
| CN105156612A (en) * | 2015-09-24 | 2015-12-16 | 刘浩 | Variable-speed transmission mechanism, variable-speed rotary cultivator and speed change method |
-
1991
- 1991-12-06 CN CN 91222773 patent/CN2113241U/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102030073A (en) * | 2010-12-10 | 2011-04-27 | 徐志安 | Centre shaft four-speed transmission for bicycle |
| CN102030073B (en) * | 2010-12-10 | 2013-05-01 | 徐志安 | Centre shaft four-speed transmission for bicycle |
| CN103718685A (en) * | 2012-10-13 | 2014-04-16 | 陈茂寅 | Pivot steering control device |
| CN105156612A (en) * | 2015-09-24 | 2015-12-16 | 刘浩 | Variable-speed transmission mechanism, variable-speed rotary cultivator and speed change method |
| CN105156612B (en) * | 2015-09-24 | 2018-04-24 | 刘浩 | Variable transmission mechanism, speed variable tillage cultivator and method for changing speed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |