CN2086716U - Drum brake of bicycle - Google Patents
Drum brake of bicycle Download PDFInfo
- Publication number
- CN2086716U CN2086716U CN 90219552 CN90219552U CN2086716U CN 2086716 U CN2086716 U CN 2086716U CN 90219552 CN90219552 CN 90219552 CN 90219552 U CN90219552 U CN 90219552U CN 2086716 U CN2086716 U CN 2086716U
- Authority
- CN
- China
- Prior art keywords
- brake
- curved surface
- fuse
- box
- locating plate
- 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.)
- Pending
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- Braking Arrangements (AREA)
Abstract
The utility model provides an expanding brake for bicycles, which is mainly composed of a brake core, a positioning plate, a braking plate with a curved surface, a spring stop ring, a brake boot, etc.; in addition, a pin shaft is fixed on the brake boot, and a teleflex is arranged on the pin shaft. The brake boot can do orienting simultaneous movements while braking. The expanding brake for bicycles has the advantages of big friction area, uniform contact, sensitive braking, safe reliability, fewer component parts, compact structure, concise appearance and shape, and lightness and handiness.
Description
The utility model relates to a kind of brake that is used for bicycle.
The brake that present bicycle is used has a variety of, and wherein a kind of is the lock that rises, and is made up of the fuse-box that rises, fuse-box lid, anchor shaft, eccentric shaft, brake shoe, brake support shield, rocking arm etc.The fuse-box that rises is fixed on the axle body, rotates synchronously with axle body.The fuse-box lid is connected with the fork leg with brake support shield, and is installed in a rod one end by its centre hole, is fastened on the vehicle frame jointly with the axle rod.Anchor shaft becomes symmetric position to be installed in fuse-box to cover with eccentric shaft, eccentric shaft can rotate.In the both sides of anchor shaft and eccentric shaft, assemble two brake shoes, to strain mutually by two extension springs, two brake shoe upper ends are stuck in the anchor shaft both sides, and following end in contact is in the eccentric shaft both sides.Brake shoe is by the internal expanding brake lining, rise brake lining, brake rubber block, rivet formed outward.Rocking arm one end is fastened on the eccentric shaft, and the other end is connected with the transmission device of brake weight.During brake, under the rocking arm effect of the application of force outside, eccentric shaft rotates, brake shoe increase with eccentric throw and turgor pressure on the fuse-box circumferential inner wall that rises, the fuse-box that rises is stopped operating, reach the brake purpose.After the outer application of force disappeared, brake shoe broke away from the fuse-box that rises and stops brake under the extension spring effect.This lock component part that rises is many, and part function is overlapping, and integral structure is complicated, and processing technology requires tight, and technological process is long, and cost is higher.During brake, because stressed outer the rising of brake shoe one end, the brake rubber block surface can not rub with the fuse-box that rises effectively entirely, causes the brake rubber block friction ring even, has reduced braking effect.
The purpose of this utility model provides that a kind of component part is few, structure is simple, processing technology realizes that easily cost is low, a kind of bicycle brake that braking effect is good.
The technical solution of the utility model is: fuse-box is fastened on the axle body with thread connecting mode, rotates synchronously with axle body.A plate portion of fuse-box lid is connected with the fork leg, and dome is partly fastening motionless with the axle rod by its centre hole.Cover at fuse-box and to be fixed with the lock core, locating plate, curved surface braking vane, trip ring are housed on the lock core.Along three brake shoes are housed on the circumference of locating plate and curved surface braking vane.Be fixed with bearing pin on the brake shoe, pivoted housing is housed on the bearing pin, bearing pin is positioned at the locating plate guide groove, and pivoted housing is positioned on the curved surface of braking vane.The outer application of force is rotated the curved surface braking vane during brake on the lock core, simultaneously also make the pivoted housing that is positioned on the curved surface be switched to the eminence of curved surface by the lower of curved surface, bearing pin also thereupon in the locating plate guide groove along radially sliding, with the brake shoe turgor pressure on the fuse-box inwall, fuse-box is stopped operating, reach the brake purpose.
The utility model is owing to adopt locating plate and curved surface braking vane, and three brake shoes can be directed when making brake, is synchronized with the movement, and the friction face of brake rubber block can all turgor pressure be on the fuse-box inwall equably, and it is sensitive to reach brake, safe and reliable.Simplify the structure, reduced part, reduced cost, outward appearance appearance is terse light and handy.
Detailed structure of the present utility model is provided by the following drawings:
Fig. 1 is a kind of structural front view of the present utility model.
Fig. 2 is along A-A line cutaway view among Fig. 1.
Fig. 3 is the brake structure back view that fuse-box covers among Fig. 1.
Below in conjunction with accompanying drawing the utility model is described in detail.
Referring to Fig. 1-3, the fuse-box 3 of this brake is fastenedly connected on axle body 1, rotates synchronously with axle body 1 when cycling.Fuse-box lid 4 is plectane spares, and the center is convex and is fastened on a rod 2 one ends by its centre hole, and a deep-slotted chip breaker and a support arm are arranged on the periphery, and the arm end is connected to a fixed with fork leg 6.Lock core 8 big ends are fixed on the fuse-box lid 4 by straight pin 5, and there is a groove at small end excircle place, and trip ring 16 is positioned at groove.Locating plate 9 is with interference fit, and curved surface braking vane 10 is assemblied on the lock core 8 successively with free-running fit.Three guide grooves 17 are arranged on the locating plate 9.Three curved surfaces 18 and a pivoted arm are arranged on the curved surface braking vane 10, and the arm end is hinged with the transmission device of the outer application of force, and trip ring 16 prevents that curved surface braking vane 10 is outer sliding.Circumference at locating plate 9 and curved surface braking vane 10 has disposed three arc brake shoes 7.Brake shoe 7 is made up of brake lining 11, bearing pin 12, pivoted housing 13, brake rubber block 14, rivet 15.Brake lining 11 is arc slotwares, and its groove is fixed with bearing pin 12 along the middle part, pivoted housing 13 is housed on the bearing pin 12, and brake rubber block 14 is fixed on the brake lining 11 by rivet 15.Brake shoe 7 is with locating plate 9, when curved surface braking vane 10 assembles, and its bearing pin 12 is positioned at the guide groove 17 of locating plate 9, and pivoted housing 13 is positioned at curved surface 18 low spots of curved surface braking vane 10.
The brake process of this brake is such: bicyclist's brake weight, make the pivoted arm of curved surface braking vane 10 by its transmission device, in the arc shaped groove of fuse-box lid 4 to preceding swing, driving the plate body serves as that axle rotates with lock core 8, be positioned at the pivoted housing 13 on the curved surface 18, lower by curved surface 18 is switched to eminence, support 12 whiles of bearing pin suitable radially sliding in the guide groove 17 of locating plate 9 of pivoted housing 13, with three brake shoes, 7 synchronous turgor pressures on the inwall of fuse-box 3, produce positive pressure and friction force, fuse-box 3 is stopped operating, reach the brake purpose.
Claims (1)
1, a kind of bicycle expansion brake, form by fuse-box, brake rubber block, rivet etc., it is characterized in that: cover at fuse-box and be fixed with the lock core, locating plate, curved surface braking vane, trip ring are housed on the lock core, along three brake shoes are housed on the circumference of locating plate and curved surface braking vane, be fixed with bearing pin on the brake shoe, pivoted housing is housed on the bearing pin, bearing pin is positioned at the locating plate guide groove, and pivoted housing is positioned on the curved surface of curved surface braking vane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90219552 CN2086716U (en) | 1990-10-19 | 1990-10-19 | Drum brake of bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90219552 CN2086716U (en) | 1990-10-19 | 1990-10-19 | Drum brake of bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2086716U true CN2086716U (en) | 1991-10-16 |
Family
ID=4898224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90219552 Pending CN2086716U (en) | 1990-10-19 | 1990-10-19 | Drum brake of bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2086716U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373488A (en) * | 2014-12-09 | 2015-02-25 | 叶雪峰 | Elastic brake |
| CN107284595A (en) * | 2017-07-10 | 2017-10-24 | 宁波优升车业有限公司 | A kind of brake gear for being fixed on bicycle contact pin groove |
-
1990
- 1990-10-19 CN CN 90219552 patent/CN2086716U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373488A (en) * | 2014-12-09 | 2015-02-25 | 叶雪峰 | Elastic brake |
| CN107284595A (en) * | 2017-07-10 | 2017-10-24 | 宁波优升车业有限公司 | A kind of brake gear for being fixed on bicycle contact pin groove |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |