CN2190076Y - Bicycle drum brake - Google Patents
Bicycle drum brake Download PDFInfo
- Publication number
- CN2190076Y CN2190076Y CN 94227630 CN94227630U CN2190076Y CN 2190076 Y CN2190076 Y CN 2190076Y CN 94227630 CN94227630 CN 94227630 CN 94227630 U CN94227630 U CN 94227630U CN 2190076 Y CN2190076 Y CN 2190076Y
- Authority
- CN
- China
- Prior art keywords
- brake
- hoof
- braking
- double
- lock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a bicycle drum brake which is characterized in that a fixed pivot A is arranged on the plane surface of a braking bottom plate 6; a crank link mechanism and a left braking shoe 1 hinged with the crank link mechanism coil around A; whereas a gap adjusting mechanism fixedly connected to the left shoe 1 is hinged with a right braking shoe 4 at B point by a floating way; the upper end of the right shoe 4 is hinged at the A point to form the structure of floating double-shoe force-increase; the structure of floating double-shoe force-increase uses the A point as the rotating center and is hinged into integration, whereas a centring position-limit mechanism of the floating double shoes is made up of two round pins 13 and the A point. The structure of floating double-shoe force-increase has the advantages of big braking force, stableness, reliability, and long service life.
Description
The utility model belongs to bicycle, widely used hoof one drum brake mechanism of mini-motorcycle, is commonly called as the bicycle brake lock that rises.
Now common bicycle or mini-motorcycle braking rising lock generally all adopt the non-symmetrical hoof one drum-type structure of lock torque.It is usually by rotating element one brake wheel, not the composition such as crank arm of rotating element one brake shoe brake cheek, brake shoe expander, rest pin, pull back spring and transmission brake shoe expander.The wheel nave of brake wheel and rotation is fixed together, and be ferrodo mutual action on running surface and the brake shoe brake cheek with garden cylinder in it, when the interior garden of brake wheel cylinder contacts with certain positive pressure with ferrodo on the brake shoe brake cheek, and when producing relative spin friction moment, this friction moment is lock torque, brakes the lock that rises and promptly produces brake action; When the ferrodo on garden cylinder and the brake shoe brake cheek in the brake wheel is thrown off, then to brake the lock that rises and discharge braking, this moment, wheel was in the free state of non-braking.The rise structure of lock of braking must guarantee that braking is reliable, and enough braking forces are arranged, and it is light etc. that glancing impact requires steadily and handles.
Now as follows to the rise architectural feature analysis of lock of existing hoof one drum brake in conjunction with legend: as depicted in figs. 1 and 2: an end separately of left brake shoe brake cheek 1 and right system hoof 4 is a supporting-point with the center B of rest pin 7 all, the other end then utilizes the pulling force of two pull back springs 5, make and tightly rest on the brake shoe expander 2, be distributed in the Nei Yuan both sides of brake wheel 3 symmetrically, the surface, garden has corresponding garden gesture and keeps rational gap with it in the outer rim of the ferrodo M on the left and right brake shoe brake cheek and the brake wheel 3; Brake shoe expander 2 and rest pin 7 all are fixed on not rotating on the base plate 6 of drg, but brake shoe expander 2 can be under the traction transmission of cranking arm of base plate 6 back, rotate at the A of base plate 6 point, make the brake shoe brake cheek on the lift pushing both sides of cam 2 turn over an angle around the center of rest pin 7 B, ferrodo M on the brake shoe brake cheek is pressed on the surface, interior garden of brake wheel 3, to produce brake action.When the lift of the traction transmission brake shoe expander 2 of cranking arm was replied zero-bit, under the effect of pull back spring 5, the ferrodo M on the brake shoe brake cheek threw off surface, garden in the brake wheel, then discharges braking this moment.
As above the bicycle expansion brake of structure must keep rational gap between the surface, garden in ferrodo on its brake shoe brake cheek and the brake wheel, and this is to guarantee to rise the reliable and stable essential condition of lock deceleration and stopping performance.Objective fact shows, this structure rise by lock after using a period of time, because ferrodo wearing and tearing, make and brake wheel in gap between the surface, garden constantly increase, and contact with brake wheel when the lift of the brake shoe expander ferrodo that the position also is not enough to push on the brake shoe brake cheek that reaches capacity, and when producing enough positive pressures, thereby braking failure.The braking of this structure lock that rises short its in service life, and braking failure takes place easily, and it is unreliable to brake, and is its fairly obvious shortcoming.
The as above bicycle expansion brake of structure, the force analysis during its work make the application force that moving cam promotes left and right brake shoe brake cheek and are respectively P as shown in Figure 2
1And P
2, again when wheel nave be anticlockwise direction when rotation shown in haircut among the figure, brake wheel is respectively Y by ferrodo to the normal reaction of brake shoe brake cheek
1And Y
2To be brake wheel be respectively X to the friction force of brake shoe brake cheek to its tangential antagonistic force
1And X
2As seen from the figure, the stressed X on the left brake shoe brake cheek
1Downwards, the stressed X on the right braking hoof
2Upwards.Stressed X on the hoof of a left side
1Moment and P that rest pin center B is produced
1Center B to rest pin produces moment direction unanimity; And the stressed X on the right hoof
2Moment and power P that rest pin center B is produced
2Opposite to supporting the moment direction that 7 center B are produced.So power X
1Have to make the trend that compresses more between left hoof and the brake wheel, so claim that left hoof is the growth trend hoof; On the contrary, power X
2Have to make right hoof throw off the trend of brake wheel, so claim that right hoof is a trailing shoe.Obviously, the friction moment of this overbalance symmetry causes braking force to diminish in the braking procedure, the deceleration and stopping performance variation.This be hoof one drum brake of existing structure rise lock distinct disadvantage two.
In addition, hoof one drum brake of existing structure rises by lock after the ferrodo wearing and tearing, is difficult to by the outside adjustment deceleration and stopping performance be recovered, and repairing or transposing ferrodo are then pretty troublesome.
The purpose of this utility model is: for the existing shortcoming of the bicycle expansion brake that overcomes existing structure, a kind of deceleration and stopping performance force booster type hoof one drum brake steadily reliable, that braking force is big, the life-span is long lock that rises is provided, for this reason, the utility model has carried out following structural development to existing bicycle expansion brake:
1, the employing piston crank mechanism replaces the power transferring structure of former brake shoe expander, to increase the moving displacement amount of brake shoe brake cheek.
2, the growth trend and the trailing shoe structure of change overbalance symmetry are the force booster type double-hoof structure.
3, in the centre of left and right brake shoe brake cheek clearance adjustment mechanism is set,, makes braking steadily reliable to regulate the reasonable clearance amount between the surface, garden in ferrodo and the brake wheel.
Now 3 pairs of structures of the present utility model are described in detail as follows in conjunction with the accompanying drawings: on the inner plane of back-plate 6, connecting rod 2 in brake shoe brake cheek 1 upper end, a left side and the piston crank mechanism is movably hinged, and the lower end of left brake shoe brake cheek 1 is then realized floating hinge joint by the lower end of a clearance adjustment mechanism and brake shoe brake cheek 4 at the B point; The upper end of brake shoe brake cheek 4 is that the garden pin 7 at center is movably hinged with the A point with crank 8 jointly then; Two garden Xiao 13 fixed connection on non-rotary back-plate 6 on the garden pin 7 and the inboard both sides of two hoof that are symmetrically distributed.Thereby crank 8, connecting rod 2, left hoof 1 and right hoof 4, and by the clearance adjustment mechanism between two hoof common to constitute with the A point be the hinged all-in-one-piece of the centre of gration double-hoof structure that floats.Two hoof glancing impacts, promote connecting rod 2 by crank 8 rotations, make hinged unsteady two hoof along the expansion of garden week, ferrodo M on two hoof evenly compresses the surface, interior garden of the brake wheel 3 that rotatablely moves on Quan Yuanzhou, and transmit the size of external control power according to piston crank mechanism, and produce the corresponding lock torque of size.After brake operation external force discharges, crank 8, connecting rod 2 and hinged unsteady two hoof 1 and 4 shrink and restore under the restoring force effect of spring 5 and spring 9, and two garden Xiao 13 and common centering stop gears that constitute two hoof of fulcrum A that are symmetrically distributed in inboard two limits of two hoof.
Clearance adjustment mechanism is adjusted seat 12 by a left side that has negative thread, has the Adjusting bolt Adjusting screw 11 and adjustment seat 10 formations such as grade that have double-screw bolt of internal and external threads; Perhaps adjust seat 12 by a left side that has negative thread, double end is adjusted double-screw bolt 11 and is had adjustment seat 10 formations such as grade of negative thread.Have the Adjusting bolt Adjusting screw 11 of internal and external threads or double end regulate double-screw bolt 11 all and about the screw thread of adjustment be matchedly connected.The internal and external threads of Adjusting bolt Adjusting screw 11 is reverse threads; The screw thread that double end is regulated on the double-screw bolt 11 both sides double-screw bolts also is a reverse thread.A left side is adjusted seat 12 and is adopted two Xiao to be fixedly connected with the lower end of left brake shoe brake cheek 1, and the right seat 10 of adjusting is realized unsteady the connection with the lower end of brake shoe brake cheek 4 at the B point, therefore when turn Adjusting bolt Adjusting screw 11 or turn double end adjusting double-screw bolt 11, make with about adjust the left and right sides brake shoe brake cheek that seat links to each other and do counter motion, reach reasonable range to adjust ferrodo on pair hoof and the gap between the brake wheel.
The as above bicycle expansion brake of structure, its force analysis is as seen shown in Figure 4, establishes the brake wheel hand of rotation and is the diagram conter clockwise direction of arrow, and crank promotes connecting rod around the rotation of A point, and the power that two hoof are expanded is P, and brake wheel is respectively Y to the normal reaction of left and right hoof
1And Y
2, tangent direction friction power is X
1And X
2Obviously, P power is bigger, Y
1And Y
2Normal reaction is then bigger, makes tangent direction friction power X
1And X
2Also bigger.Thereby braking force is just bigger.Vice versa.P power size is artificially handled control by the outside, thereby the size of braking force is also controlled by external control with P power size; Can also analyze from Fig. 4 and to know tangent direction friction power X
1And X
2To A point torque direction is consistent, so the utility model is to belong to growth trend type double-hoof structure, can produce the more tangible braking effect than retrothrust P; Can further analyze from Fig. 4 and to know that left and right sides brake shoe brake cheek by B point floating hinge, can make left and right friction force X
1And X
2And the braking growth trend effect of their generations, the unanimity that tends to balance, so the utility model is a kind of growth trend type double-hoof structure of left and right balanced, symmetrical.
In sum, the utility model is compared with existing structure and is had significant effect and advantage.
1, the utility model belongs to the growth trend type double-hoof structure of balanced, symmetrical, thereby has braking steadily reliably, handles light and remarkable advantage that braking force is big.
2, the utility model is owing to be the growth trend type double-hoof structure of balanced, symmetrical, and not only braking force is big, and braking effect is obvious, and braking force also can be with the size variation of the artificial actuating force in outside, and is therefore reliable rapidly when emergency brake, more shows its high performance.
3, the utility model has adopted the brake shoe expander in the alternative existing structure of piston crank mechanism, thereby increased the moving displacement amount of the two hoof of braking, overcome the shortcoming that the brake shoe expander lift is restricted, both reduced the possibility of braking failure, also prolonged the effective life of the lock that rises.
4, set up the clearance adjustment mechanism of hoof drum, both improved useful service life of the present utility model, the more important thing is to guarantee that the utility model keeps rational structure state in long-term use, made deceleration and stopping performance steady in a long-term reliable.
5, owing to the utlity model has good deceleration and stopping performance, braking force is big, the life-span is long, reliable and stable, so not only bicycle, mini-motorcycle all can be extensive use of, and light-duty power car such as motor bike etc. also can use, and have good economic technology benefit.
Below as follows to the accompanying drawing supplemental instruction: Fig. 1 is that the rise inner structure of lock of existing bicycle brake is non-braking mode diagrammatic sketch, left side hoof 1 and right hoof 4 are positioned on the inner plane of non-rotary base plate 6, and utilize the spring convergent force that it is rested on brake shoe expander 2 and the rest pin 7 at two ends up and down, on the structure both sides that are symmetrically distributed in the interior garden post of brake wheel 3, and keep reasonable clearance with it, but as can be known, this structure is the hoof one drum-type structure that belongs to the overbalance symmetry from the braking force analysis of Fig. 2.At the back side of base plate 6, on brake shoe expander 2 coaxial, there is one to drive cranking arm of brake shoe expander 2 and fail to draw demonstration, this is cranked arm and links to each other with lever connection, and the operator can realize remote brake operation.Fig. 2 is the rise braking force analysis figure of lock of existing bicycle brake as described above.The A point is the center of gyration of brake shoe expander 2, also is the last end bearing center of brake shoe brake cheek 1 and brake shoe brake cheek 4; The B point is the center of rest pin 7, also is the following end bearing center of brake shoe brake cheek 1 and brake shoe brake cheek 4.Fig. 3 is inner structure diagrammatic sketch of the present utility model as described above, its left brake shoe brake cheek 1, right braking hoof 4 and formations such as interconnective piston crank mechanism and clearance adjustment mechanism be that the floating hinge joint all-in-one-piece double-hoof structure of centre of gration is to be positioned on the inner plane of non-rotary back-plate 6 with the A point, show certain clearance between the ferrodo M on the location positioning of two hoof about when diagram has shown non-braking mode, this moment two hoof and the post surface, interior garden of brake wheel.Have one to drive having cranked arm of crank 8 and draw demonstration on the back side of back-plate 6, garden post Xiao 7 coaxial, this is cranked arm and links to each other with lever connection, realizes remote brake operation by the operator.Fig. 4 is that the utility model is in the force analysis figure under the braking mode, since about two hoof under the promotion of piston crank mechanism, expand along garden Zhou Fangxiang, the inner ring of two hoof has increased two spacing garden Xiao 13 of disengaging about diagram, ferrodo M on it contacts with brake wheel 3, and produces corresponding braking force system.
Below in conjunction with embodiment of the present utility model, and the contrast description of drawings is as follows: Fig. 5 is the embodiment external form figure that the utility model is used for the bicycle front wheel brake, A point among the figure and 3 with 6 with earlier figures 3 in A and 3 and 6 corresponding identical, 3 promptly is the brake wheel with the wheel nave Joint of rotation, 6 are back-plate, addressed before among the figure 14 is with crank 8 coaxial cranking arm, be the braking force direction of draw among the figure shown in the arrow, the 15th, and support before the anti-rotation of back-plate 6 fixed connection one, the front fork of it and bicycle is affixed.Fig. 6 is the cut-away view after Fig. 5 sees through back-plate 6, show among the figure, for adapting to front wheel brake crank arm 14 location layout needs of lock that rise, change slightly in the orientation one of piston crank mechanism in the inner structure and spring 5 and Fig. 3 diagrammatic sketch, but substantial architectural feature is then identical.Fig. 7 is the embodiment external form figure that the utility model is used for the bicycle rear braking, A point among the figure and 3 and 6 and earlier figures 3 in A point and brake wheel 3, back-plate 6 is corresponding identical, among the figure 14 is and drives cranking arm of crank 8, direction shown in the arrow is the braking force direction of draw among the figure, the 15th, with the anti-rotation back brace of back-plate 6 fixed connection one, it is fixing on bicycle rear supports.Fig. 8 is the cut-away view after Fig. 7 sees through back-plate 6, and the layout that shows among the figure is described consistent with architectural feature and Fig. 3.
Claims (7)
1, a kind of bicycle brake lock that rises, by rotating element brake wheel and rotating element brake shoe brake cheek not, back-plate, compositions such as pull back spring, feature of the present utility model is on the inner plane of back-plate 6, have a fixed pivot A and the crank 8 that can rotate around fulcrum A and with crank 8 pivotally attached connecting rods 2, the upper end of the other end of connecting rod 2 and left brake shoe brake cheek 1 is hinged, the lower end of left side brake shoe brake cheek 1 is realized floating hinge joint by the lower end of a clearance adjustment mechanism and right braking hoof 4 at the B point, the upper end of brake shoe brake cheek 4 is that the center is hinged with fulcrum A with crank 8 jointly then, is the unsteady double-hoof structure of hinged all-in-one-piece of centre of gration thereby constitute with fulcrum A.
2, the bicycle brake according to claim 1 lock that rises, feature of the present utility model is on the inner plane of back-plate 6, has two garden Xiao 13 to be symmetrically distributed in the both sides of the two hoof inboards of braking, and and fulcrum A form the spacing centering machine of the two hoof of braking jointly.
3, the bicycle brake according to claim 1 lock that rises, feature of the present utility model is that the clearance adjustment mechanism between the two hoof lower ends of braking is adjusted seat 12 by the left side with negative thread, Adjusting bolt Adjusting screw 11 with internal and external threads, seat 10 formations such as grade are adjusted on the right side that has double-screw bolt, the internal and external threads of Adjusting bolt Adjusting screw 11 respectively with about adjust seat screw thread match.
4, the bicycle brake according to claim 1 lock that rises, feature of the present utility model is that the clearance adjustment mechanism between the two hoof lower ends of braking is regulated double-screw bolt 11 etc. and constituted by left side adjustment seat 12 that all has negative thread and right seat 10 and the double end adjusted, and double end is regulated double-screw bolt 11 and matched with the negative thread of the adjustment seat on two limits respectively.
5, according to claim 3 or the 4 described bicycle brakes lock that rises, feature of the present utility model is that the double-pin fixed connection is adopted in the lower end that seat 12 and brake shoe brake cheek 1 are adjusted in the left side in the clearance adjustment mechanism, and the right lower end of seat 10 and right braking hoof 4 of adjusting is at B point realization floating hinge joint.
6, the bicycle brake according to claim 3 lock that rises is characterized in that the internal and external threads of the Adjusting bolt Adjusting screw 11 in the clearance adjustment mechanism is reverse threads.
7, the bicycle brake according to claim 4 lock that rises is characterized in that the double end in the clearance adjustment mechanism is regulated double-screw bolt 11, and the screw thread on its two limits double-screw bolt is a reverse thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94227630 CN2190076Y (en) | 1994-01-27 | 1994-01-27 | Bicycle drum brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94227630 CN2190076Y (en) | 1994-01-27 | 1994-01-27 | Bicycle drum brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2190076Y true CN2190076Y (en) | 1995-02-22 |
Family
ID=33840339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94227630 Expired - Fee Related CN2190076Y (en) | 1994-01-27 | 1994-01-27 | Bicycle drum brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2190076Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704395B (en) * | 2009-11-10 | 2010-10-06 | 上海百顺锁业有限公司 | Hub-brake for electric vehicle |
| CN108679125A (en) * | 2018-07-18 | 2018-10-19 | 崔忠民 | Unreeling does not restore braking ability instantaneous centre brake in three forces on Combined bracket |
-
1994
- 1994-01-27 CN CN 94227630 patent/CN2190076Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704395B (en) * | 2009-11-10 | 2010-10-06 | 上海百顺锁业有限公司 | Hub-brake for electric vehicle |
| CN108679125A (en) * | 2018-07-18 | 2018-10-19 | 崔忠民 | Unreeling does not restore braking ability instantaneous centre brake in three forces on Combined bracket |
| CN108679125B (en) * | 2018-07-18 | 2019-08-13 | 崔忠民 | Unreeling does not restore braking ability instantaneous centre brake in three forces on Combined bracket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |