COOLING DEVICE FOR HYDRAULIC BRAKING SYSTEMS

Abstract

A cooling device for hydraulic braking systems includes a case, a turbine unit, and a ring which is connected to an end of a hub. The case has a thorough hole and a ventilation exit communicating inside and outside of the case is defined on the case. The turbine unit is located in the case and has a fixing hole which communicates with the through hole. The ring is connected to the fixing hole of the turbine unit. The ring drives the turbine unit which generates air flows in the case. The air flows flow to the outside of the case via the ventilation exit to remove the heat of the braking system.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to cooling device for hydraulic braking systems, and more particularly to a cooling action to the hydraulic braking system by air ventilation.

2. Description of Related Art

Bicycles are very popular today. When a cyclist rides a bicycle along an uphill, the braking system ensures the safety for the cyclist and the modern braking system is operated by hydraulic system which drives the lining plates in the braking system to contact the braking disc to slow down and stop the wheel. For the reason of safety, it is necessary to brake frequently when the cyclist rides along a downhill. Consequently, the braking disc can be overheat and further reduce the friction coefficient between the lining plates and the braking disc, such that the cyclist might be dangerous when the braking system is not work.

Some manufacturers set recesses defined in the braking disc to allow air to flow through the recesses along the tangent direction to remove the heat when the braking disc rotates. However, the braking disc is a hollow plate which cannot generate air ventilation by the rotation of itself, thus the temperature cannot be reduced efficiently. When the temperature of the braking disc continuously increases, the braking function is not sensitive and the braking disc may be deformed permanently. The deformation may cause cracks to the braking disc so that it is important to reduce the high temperature of the braking disc to ensure the safety of the riders.

The present invention has arisen to mitigate and/or obviate the disadvantages of the conventional braking systems and provides a cooling device for hydraulic braking systems to cool down the braking disc.

SUMMARY OF THE INVENTION

The main objective of the present invention is to provide a cooling device for improving overheat of the conventional braking systems.

To achieve the objective, a cooling device for hydraulic braking systems comprises a case having a thorough hole defined therethrough and a ventilation exit defined on the case, the ventilation exit communicating inside and outside of the case, a turbine unit located in the case and having a fixing hole, the fixing hole communicated with the through hole and having a plurality of protrusions at an inside of the fixing hole, a ring connected to an end of a hub and connected to the fixing hole of the turbine unit, the ring having a plurality of notches to engage with the protrusions; wherein the ring drives the turbine unit which generates air flows in the case, the air flows flowing to the outside of the case via the ventilation exit to remove the heat.

A guide groove is defined in a side of the turbine unit and a plurality of ribs are located around the guide groove, the ribs extended inclinedly along a curvature and toward the fixing hole, an aperture defined between any of the adjacent ribs and located on a periphery of the guide groove.

A diameter of the turbine unit is larger than a diameter of the through hole.

The turbine unit has a plurality of clamping plates located around the fixing hole and the clamping plates are arranged in pairs and located on two sides of the portions between two notches for clamping.

Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view to show the first embodiment of the present invention;

FIG. 2 is a perspective view to show the first embodiment of the present invention;

FIG. 3 is a cross-sectional view of a turbine unit of the first embodiment of the present invention;

FIG. 4 is an assembled view to show the operation status of the first embodiment of the present invention; and

FIG. 5 is a perspective view to show the second embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially to FIGS. 1 to 3, the cooling device for hydraulic braking systems in accordance with the present invention comprises a case 1, a turbine unit 2 and a ring 4 that is connected to an end of a hub 3. The case 1 is a spiral case and a thorough hole 11 is defined therethrough. A ventilation exit 12 is defined on the case 1 and communicates the inside and the outside of the case 1, so that the air convection between the inside and the outside of the case 1 is possible. The turbine unit 2 is located and operated in the case 1 and the turbine unit 2 has a fixing hole 21 which communicates with the through hole 11. A plurality of protrusions 22 is located at an inside of the fixing hole 21 and each protrusion 22 is an oval protrusion. The conjunction portions between the two sides of the protrusion 22 and the fixing hole 21 are two recesses so as to be pivotably connected with the ring 4. A guide groove 23 is defined in a side of the turbine unit 2 which has an open end and a closed end to reinforce the air flows. A plurality of ribs 24 is located around the guide groove 23 and the ribs 24 extend inclinedly along a curvature and counterclockwise toward the fixing hole 21. An aperture 25 is defined between any of the two adjacent ribs 24 and located on the periphery of the guide groove 23. The aperture 25 is an elongate hole which is cooperated with the ribs 24 to generate air flows. The diameter of the turbine unit 2 is larger than the diameter of the through hole 11. By the arrangement, when the turbine unit 2 operates in the case 1, the turbine unit 2 does not drop off form the case 1. The ring 4 is connected to the fixing hole 21 of the turbine unit 2 and a plurality of notches 41 is defined in the outer periphery of the ring 4. The protrusions 22 are engaged with the notches 41. The ring 4 drives the turbine unit 2 which generates air flows in the case 1. The air flows flow to the outside of the case 1 via the ventilation exit 12 to remove heat.

Referring to FIG. 4, the operation status comprises a hydraulic clamper 5 and a braking disc 6. The air flows are guided to the hydraulic clamper 5 and the braking disc 6 via the ventilation exit 12 to cool the braking disc 6.

Referring to FIG. 5, in the second embodiment of the present invention, wherein the turbine unit 2 has a plurality of clamping plates 26 located around the fixing hole 21 and the clamping plates 26 are arranged in pairs and corresponding to two sides of the portions between two notches 41 for clamping. The ring 4 is fixed to the turbine unit 2 so that when the hub 3 is operated, the ring 4 is co-rotated and drives the turbine unit 2 which generates air flows in the case 1. The air flows are guided to outside of the case 1 via the ventilation exit 12 to achieve the purpose of cooling.

Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.

Claims

1. A cooling device for hydraulic braking systems comprising:

a case having a thorough hole defined therethrough and a ventilation exit defined on the case, the ventilation exit communicating inside and outside of the case;

a turbine unit located in the case and having a fixing hole, the fixing hole communicated with the through hole and having a plurality of protrusions at an inside of the fixing hole; and

a ring connected to an end of a hub and connected to the fixing hole of the turbine unit, the ring having a plurality of notches to engage with the protrusions;

wherein the ring drives the turbine unit which generates air flows in the case, the air flows flowing to the outside of the case via the ventilation exit to remove the heat.

2. The cooling device for hydraulic braking systems as claimed in claim 1, wherein a guide groove is defined in a side of the turbine unit and a plurality of ribs are located around the guide groove, the ribs extended inclinedly along a curvature and toward the fixing hole, an aperture defined between any of the adjacent ribs and located on a periphery of the guide groove.

3. The cooling device for hydraulic braking systems as claimed in claim 1, wherein a diameter of the turbine unit is larger than a diameter of the through hole.

4. The cooling device as claimed in claim 1, wherein the turbine unit has a plurality of clamping plates located around the fixing hole and the clamping plates are arranged in pairs and located on two sides of the portions between two notches for clamping.