WO2017157354A1 - Back pedal rear brake for bicycle - Google Patents

Back pedal rear brake for bicycle Download PDF

Info

Publication number
WO2017157354A1
WO2017157354A1 PCT/CZ2017/000014 CZ2017000014W WO2017157354A1 WO 2017157354 A1 WO2017157354 A1 WO 2017157354A1 CZ 2017000014 W CZ2017000014 W CZ 2017000014W WO 2017157354 A1 WO2017157354 A1 WO 2017157354A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
pedals
ratchet
stops
driving shaft
Prior art date
Application number
PCT/CZ2017/000014
Other languages
French (fr)
Inventor
Milan JURAN
Original Assignee
Juran Milan
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Juran Milan filed Critical Juran Milan
Publication of WO2017157354A1 publication Critical patent/WO2017157354A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L5/00—Brakes, or actuating mechanisms therefor, controlled by back-pedalling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K19/00—Cycle frames
    • B62K19/30—Frame parts shaped to receive other cycle parts or accessories
    • B62K19/34—Bottom brackets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K23/00—Rider-operated controls specially adapted for cycles, i.e. means for initiating control operations, e.g. levers, grips
    • B62K23/08—Rider-operated controls specially adapted for cycles, i.e. means for initiating control operations, e.g. levers, grips foot actuated

Definitions

  • the invention relates to a rear brake of a bicycle which can be activated by means of a treadle pedal and applied also to a bicycle with a shift.
  • the aim of the present invention is to introduce a bicycle which should have a shift but simultaneously it would be possible to brake by pedals, thereby skip the manual hand braking and facilitate long and frequent braking, e.g. during long downhill ride.
  • brake pedal for a bicycle with a shift whose principle consists in that the brake is arranged in a brake cover which is firmly seated on the frame and through which the driving shaft with pedalsis protruded, wherein the brake mechanism consists of an outer part not connected directly on the pedals and with respect to it rotationably arranged inner part connected directly to the pedals, wherein between these two parts a ratchet mechanism is arranged consisting of a swinging ratchet rotationably mounted on a hub and provided with the swing back pushing it to one of the above mentioned parts, wherein the break cover is further provided with a permeation for a lever which is fastened on the outer part and to the lever a sail is mounted leading to the brake jaw of the rear disc brake.
  • the outer part is designed as a ratchet ring with stops which has an inner surface formed as a double cam always between two stops and inner part is constructed as a ratchet segment on which the hubs of swinging ratchets and the swing back.
  • the outer part is designed as a ratchet ring on which hubs of swinging ratchets and the swing back are arranged and the inner part is constructed as a ratchet segment with stops which has an outer surface formed as a double cam always between two stops .
  • the inner part is directly connected to pedals via coupling elements arranged so, that they extend into the driving shaft and also into the inner part, and between the coupling elements in the hole inside the driving shaft a press spring is arranged.
  • the coupling elements are designed as balls, press springs are two and between them the ratchet segment as a regulator of slip through is arranged.
  • the permeation in the brake cover is in the shape of through-groove.
  • FIG. 1 presents a general view of a brake pedal for a bicycle with a shift according to the invention
  • Fig. 2 is a schematic front view of a detail of a brake pedal structural arrangement in the first embodiment
  • Fig. 3 is a schematic front view of a detail of the brake pedal structural arrangement in the second embodiment
  • Fig. 4 is a schematic top view of a partial sectional view of the brake from Fig. 3.
  • Fig. 1 is a schematic representation of a part of a bicycle comprising the shift 2 of a common construction, which is overlaid by the disc brake 3 of a common construction which has the brake jaw 4.
  • the brake pedal 1 is arranged in the brake cover 5, which is arranged on the frame 16.
  • On the main driving shaft 20 also pedals 6 are mounted and the gear 17 with the chain 18.
  • the inventive principle of the brake 1 is based on the location of a ratchet system in the brake cover 5, which is only outlined here.
  • Fig. 2 is a detailed front view of the brake pedal 1 in the first embodiment. It is obvious that it is placed in the brake cover 5 mounted on the frame 16 of the bicycle and is shaped like a disc. In this brake cover 5 is rotationably positioned the ratchet segment 23 with the swinging ratchet wheel 14 and secured by balls 21. Furthermore, around the ratchet segment 23 is arranged in the first embodiment the ratchet ring 9 with stops 10 which has an inner surface formed as a double cam 11 , always between two stops 0. In the ratchet segment 23 hubs 13 of the ratchets 14 are provided.
  • the ratchet system consists of two oppositely disposed ratchets 14 provided with swing back 15 and one end placed on the hub 13, and those ratchets cooperate with the ratchet ring 9 provided with opposed stops 10 in which when pedalling clockwise, therefore, like the brake is activated on a children's bicycle without a shift, the free ends of the ratchets 14 engage and jam in the manner that is shown in this figure and the braking is performed.
  • Fig. 3 is a front view of the brake pedal 1 in the second preferred embodiment, when this is in the brake cover 5.
  • the ratchet segment (23) is connected through the balls 21 , but unlike to the embodiment of Fig. 2 the ratchet segment 23 is constructed as a segment provided with stops 10 and on the other hand the ratchet ring 9 is provided with the swinging ratchet wheel 14 mounted on hubs 13, which are again two and oppositely disposed and provided with the swing back 15.
  • the pedals 6 are rotating clockwise, like with brakes on a bicycle without a shift, the free ends of the swinging ratchet 14 engage down to the stops 10 and jam in the manner that is shown in this figure and the braking is performed.
  • the brake pedal 1 comprises a moment setting to avoid imbalance between the large pedal power and the power required for the brake jaw 4 of the disc brake 3, so during the excessive load of the pedals 6 the driving shaft 20 slips through and prevents damaging of the brake system.
  • This slip through works on the principle of the balls 21 bogging down pressed by the press spring 22 between the driving shaft 20 and the ratchet segment 23 into the body of the driving shaft 20, in which the groove for press springs 22 is arranged.
  • the press spring 22 is set in such a way that the balls 21 at the desired slip through bog down into the driving shaft 20 and thus to it comes to rotation of the so far frictionally connected two parts - the driving shaft 20 and the ratchet segment 23.
  • Press springs 22 may be two and between them the cam 24 as a regulator of slip through is arranged.
  • Fig. 4 is a schematic top view of the partial section of the brake from Fig. 3 where it is easy to see the arrangement of balls 21 and other elements of the brake described above.
  • the brake mechanism consists of an outer part not connected directly to the pedals 6 or the driving shaft 20 thereto rotationably arranged inner part connected directly to the pedals 6.
  • the outer part is constructed as the ratchet ring 9 with stops 10 which have an inner surface formed as the double cam 11 , always between two stops 10 and the inner part is constructed as the ratchet segment 23 on which hubs 13 and of the swinging ratchet 14 and the swing back 15 are arranged.
  • the advantage of this device lies in the fact that it frees up space on a handlebar of a bicycle and hence the rider can use this place or their free hand for other activities, such as driving of the shift, navigation and others.
  • Another advantage is in comfortable braking during long and steep descents where is more comfortable for the rider to slightly push by their legs than to have still clenched fingers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

Pedal rear brake for a bicycle with a shift, when the bicycle comprises of a frame and thereon a driving shaft is mounted on which a drive gear with a chain and pedals are arranged, where the brake (1) is arranged in a brake cover (5) which is firmly seated on the frame (16) and through which the driving shaft (20) with pedals (6) is protruded, wherein the brake mechanism consists of an outer part not connected directly on the pedals (6) and with respect to it rotationably arranged inner part connected directly to the pedals (6), wherein between these two parts a ratchet mechanism is arranged consisting of a swinging ratchet (14) rotationably mounted on a hub (13) and provided with the swing back (15) pushing it to one of the above mentioned parts, wherein the break cover (5) is further provided with a permeation for a lever (7) which is fastened on the outer part and to the lever (7) a sail (8) is mounted leading to the brake jaw (4) of the rear disc brake (3).

Description

BACK PEDAL REAR BRAKE FOR BICYCLE
Technical backround
The invention relates to a rear brake of a bicycle which can be activated by means of a treadle pedal and applied also to a bicycle with a shift.
State of the art
Nowadays bicycles are made with brakes controlled by levers on a handlebar and the force is transmitted by rods to brake jaws. In elderly or children's bicycles rear brakes are activated by pedals wherein, during the reverse run, the braking
mechanism through the chain is activated, directly in the centre of the rear wheel, but the disadvantage of this system is that it cannot be combined with shift gears. The aim of the present invention is to introduce a bicycle which should have a shift but simultaneously it would be possible to brake by pedals, thereby skip the manual hand braking and facilitate long and frequent braking, e.g. during long downhill ride.
Summary of the invention
The above mentioned deficiencies are eliminated by brake pedal for a bicycle with a shift according to the invention whose principle consists in that the brake is arranged in a brake cover which is firmly seated on the frame and through which the driving shaft with pedalsis protruded, wherein the brake mechanism consists of an outer part not connected directly on the pedals and with respect to it rotationably arranged inner part connected directly to the pedals, wherein between these two parts a ratchet mechanism is arranged consisting of a swinging ratchet rotationably mounted on a hub and provided with the swing back pushing it to one of the above mentioned parts, wherein the break cover is further provided with a permeation for a lever which is fastened on the outer part and to the lever a sail is mounted leading to the brake jaw of the rear disc brake.
In a preferred embodiment the outer part is designed as a ratchet ring with stops which has an inner surface formed as a double cam always between two stops and inner part is constructed as a ratchet segment on which the hubs of swinging ratchets and the swing back.
In another preferred embodiment the outer part is designed as a ratchet ring on which hubs of swinging ratchets and the swing back are arranged and the inner part is constructed as a ratchet segment with stops which has an outer surface formed as a double cam always between two stops .
In another preferred embodiment the inner part is directly connected to pedals via coupling elements arranged so, that they extend into the driving shaft and also into the inner part, and between the coupling elements in the hole inside the driving shaft a press spring is arranged.
In another preferred embodiment the coupling elements are designed as balls, press springs are two and between them the ratchet segment as a regulator of slip through is arranged.
In another preferred embodiment the permeation in the brake cover is in the shape of through-groove.
Description of drawings
The invention will be further described by use of drawings where Fig. 1 presents a general view of a brake pedal for a bicycle with a shift according to the invention, Fig. 2 is a schematic front view of a detail of a brake pedal structural arrangement in the first embodiment, Fig. 3 is a schematic front view of a detail of the brake pedal structural arrangement in the second embodiment, and Fig. 4 is a schematic top view of a partial sectional view of the brake from Fig. 3.
Preferred embodiments of the invention
Fig. 1 is a schematic representation of a part of a bicycle comprising the shift 2 of a common construction, which is overlaid by the disc brake 3 of a common construction which has the brake jaw 4. The brake pedal 1 is arranged in the brake cover 5, which is arranged on the frame 16. On the main driving shaft 20 also pedals 6 are mounted and the gear 17 with the chain 18.
From the brake cover 5 protrudes the lever 7, on which one end of the sail 8 is mounted whose other end is mounted in a standard manner on the brake jaw 4. The inventive principle of the brake 1 is based on the location of a ratchet system in the brake cover 5, which is only outlined here.
Fig. 2 is a detailed front view of the brake pedal 1 in the first embodiment. It is obvious that it is placed in the brake cover 5 mounted on the frame 16 of the bicycle and is shaped like a disc. In this brake cover 5 is rotationably positioned the ratchet segment 23 with the swinging ratchet wheel 14 and secured by balls 21. Furthermore, around the ratchet segment 23 is arranged in the first embodiment the ratchet ring 9 with stops 10 which has an inner surface formed as a double cam 11 , always between two stops 0. In the ratchet segment 23 hubs 13 of the ratchets 14 are provided. The ratchet system consists of two oppositely disposed ratchets 14 provided with swing back 15 and one end placed on the hub 13, and those ratchets cooperate with the ratchet ring 9 provided with opposed stops 10 in which when pedalling clockwise, therefore, like the brake is activated on a children's bicycle without a shift, the free ends of the ratchets 14 engage and jam in the manner that is shown in this figure and the braking is performed.
It is obvious that if pedals 6 are engaged and the pedalling is performed counter clockwise, thus to a draw, dorsal surfaces 12 of the ratchets 14 slide on the inner circumference of the ratchet ring 9 and the stops 0 skip freely. However, when the user changes the direction of rotation, in principle if driving backwards, the free ends of the ratchets 14 engage into the stops 10 and the gear 7 stops. To the ratchet ring 9 the lever 7 is firmly attached, for which is in the brake cover 5 corresponding groove 19 is made, which swings clockwise and activates the sail 8, which transmits a draw to the brake jaw 4 of the disc brake 3. In the reverse movement of pedals 6 is thus transferred power from the clamped swinging ratchet wheel 14 in the stops 10 on the ratchet ring 9 and by using the lever 7 which is firmly arranged on it, and with the sail 8 or due to a liquid system to jaw or disc brake 3.
Fig. 3 is a front view of the brake pedal 1 in the second preferred embodiment, when this is in the brake cover 5. To the rotatable driving shaft 20 the ratchet segment (23) is connected through the balls 21 , but unlike to the embodiment of Fig. 2 the ratchet segment 23 is constructed as a segment provided with stops 10 and on the other hand the ratchet ring 9 is provided with the swinging ratchet wheel 14 mounted on hubs 13, which are again two and oppositely disposed and provided with the swing back 15. When the pedals 6 are rotating clockwise, like with brakes on a bicycle without a shift, the free ends of the swinging ratchet 14 engage down to the stops 10 and jam in the manner that is shown in this figure and the braking is performed. It is obvious that if pedals 6 are engaged and the pedalling is performed counter clockwise, thus to a draw, dorsal surfaces 12 of the ratchets 14 slide on the inner circumference of the ratchet ring 9 and the stops 10 skip freely. However, when the user changes the direction of rotation, in principle if driving backwards, the free ends of the ratchets 14 engage into the stops 10 and the gear 7 stops. To the ratchet ring 9 the lever 7 is firmly attached, for which is in the brake cover 5 corresponding groove 19 made, the lever 7 swings clockwise and activates the sail 8, which transmits a draw to the brake jaw 4 of the disc brake 3. Unlike to the embodiment from Fig. 2, power is transmitted on the lever 7 via hubs 13 of the swinging ratchet 14.
The brake pedal 1 comprises a moment setting to avoid imbalance between the large pedal power and the power required for the brake jaw 4 of the disc brake 3, so during the excessive load of the pedals 6 the driving shaft 20 slips through and prevents damaging of the brake system. This slip through works on the principle of the balls 21 bogging down pressed by the press spring 22 between the driving shaft 20 and the ratchet segment 23 into the body of the driving shaft 20, in which the groove for press springs 22 is arranged. The press spring 22 is set in such a way that the balls 21 at the desired slip through bog down into the driving shaft 20 and thus to it comes to rotation of the so far frictionally connected two parts - the driving shaft 20 and the ratchet segment 23. Press springs 22 may be two and between them the cam 24 as a regulator of slip through is arranged.
Fig. 4 is a schematic top view of the partial section of the brake from Fig. 3 where it is easy to see the arrangement of balls 21 and other elements of the brake described above.
It is therefore apparent that there are two options: - First, when the brake mechanism consists of an outer part not connected directly to the pedals 6 or the driving shaft 20 thereto rotationably arranged inner part connected directly to the pedals 6. Then the outer part is constructed as the ratchet ring 9 with stops 10 which have an inner surface formed as the double cam 11 , always between two stops 10 and the inner part is constructed as the ratchet segment 23 on which hubs 13 and of the swinging ratchet 14 and the swing back 15 are arranged. - Second, when the outer part is constructed as the ratchet ring 9 on which hubs 13 of the swinging ratchet wheel 14 and the swing back 15 are arranged, and the inner part is constructed as the ratchet segment 23 with stops 10, which has an external surface formed as the double cam 1 , always between two stops 10. In the first variant the inner part is controlled by the end of the swinging ratchet wheel 14 bogged down into the stops 0, and in the second variant the inner part is controlled by the hub 13 of the swinging ratchet 14.
System, compared to the normal older brake pedal of the torpedo type, does not limit the functionality of the high-speed shift of gear wheels. The advantage of this device lies in the fact that it frees up space on a handlebar of a bicycle and hence the rider can use this place or their free hand for other activities, such as driving of the shift, navigation and others. Another advantage is in comfortable braking during long and steep descents where is more comfortable for the rider to slightly push by their legs than to have still clenched fingers.

Claims

Claims
1. Pedal rear brake for a bicycle with a shift, when the bicycle comprises of a frame and thereon a driving shaft is mounted on which a drive gear with a chain and pedals are arranged, characterized in that the brake (1) is arranged in a brake cover (5) which is firmly seated on the frame (16) and through which the driving shaft (20) with pedals (6) is protruded, wherein the brake mechanism consists of an outer part not connected directly on the pedals (6) and with respect to it rotationably arranged inner part connected directly to the pedals (6), wherein between these two parts a ratchet mechanism is arranged consisting of a swinging ratchet (14) rotationably mounted on a hub ( 3) and provided with the swing back (15) pushing it to one of the above mentioned parts, wherein the break cover (5) is further provided with a permeation for a lever (7) which is fastened on the outer part and to the lever (7) a sail (8) is mounted leading to the brake jaw (4) of the rear disc brake (3).
2. Pedal brake according to the claim 1 , characterized in that the outer part is designed as a ratchet ring (9) with stops (10) which has an inner surface formed as a double cam (11) always between two stops (10) and inner part is constructed as a ratchet segment (23) on which the hubs (13) of swinging ratchets (14) and the swing back (15).
3. Pedal brake according to the claim 1 , characterized in that the outer part is designed as a ratchet ring (9) on which hubs (13) of swinging ratchets (14) and the swing back (15) are arranged and the inner part is constructed as a ratchet segment (23) with stops (10) which has an outer surface formed as a double cam (11) always between two stops (10).
4. Pedal brake according to the claim 1 , characterized in that the inner part is directly connected to pedals (6) via coupling elements arranged so, that they extend into the driving shaft (20) and also into the inner part, and between the coupling elements in the hole inside the driving shaft (20) a press spring (22) is arranged. Pedal brake according to claim 4, characterized in that the coupling elements are designed as balls (21), press springs (22) are two and between them the ratchet segment (24) as a regulator of slip through is arranged.
Pedal brake according to the claim 1 , characterised in that the permeation in the brake cover (5) is in the shape of through-groove.
PCT/CZ2017/000014 2016-03-17 2017-03-14 Back pedal rear brake for bicycle WO2017157354A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZPV2016-155 2016-03-17
CZ2016-155A CZ2016155A3 (en) 2016-03-17 2016-03-17 A pedal rear brake for a bicycle with a derailleur

Publications (1)

Publication Number Publication Date
WO2017157354A1 true WO2017157354A1 (en) 2017-09-21

Family

ID=58488760

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CZ2017/000014 WO2017157354A1 (en) 2016-03-17 2017-03-14 Back pedal rear brake for bicycle

Country Status (2)

Country Link
CZ (1) CZ2016155A3 (en)
WO (1) WO2017157354A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE139815C (en) *
GB444433A (en) * 1935-02-27 1936-03-20 Wilhelm Goeckel Improvements in or relating to cycle drives
EP0148181A1 (en) * 1982-11-15 1985-07-17 Trama Ab Brake device for a cycle.
DE3904786A1 (en) * 1989-02-17 1990-08-30 Armin Beck Two-wheel brake operated by back-pedalling
DE202009014577U1 (en) * 2009-10-28 2011-03-10 Daum Gmbh & Co. Kg Resignation brake

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1150592B (en) * 1961-08-02 1963-06-20 Fichtel & Sachs Ag Two-speed transmission hub for bicycles or the like.
NL292483A (en) * 1962-05-11
DE3527699A1 (en) * 1984-11-02 1987-02-12 Fichtel & Sachs Ag Multi-speed gear hub for bicycles or the like

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE139815C (en) *
GB444433A (en) * 1935-02-27 1936-03-20 Wilhelm Goeckel Improvements in or relating to cycle drives
EP0148181A1 (en) * 1982-11-15 1985-07-17 Trama Ab Brake device for a cycle.
DE3904786A1 (en) * 1989-02-17 1990-08-30 Armin Beck Two-wheel brake operated by back-pedalling
DE202009014577U1 (en) * 2009-10-28 2011-03-10 Daum Gmbh & Co. Kg Resignation brake

Also Published As

Publication number Publication date
CZ306954B6 (en) 2017-10-11
CZ2016155A3 (en) 2017-10-11

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