Brake caliper thrust device, brake caliper and manufacturing method

Patent metadata

Field	Value
Publication number	US-11428286-B2
Application number	US-201816768247-A
Country	US
Kind code	B2
Filing date	Nov 28, 2018
Priority date	Nov 30, 2017
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

A brake caliper thrust device for a disc brake is provided. The brake caliper thrust device has a thrust device body adapted to be translated inside a guide device, the thrust device body defining an internal cavity at least partially open and facing towards an object to be pushed, including a brake pad associable with the thrust device. The internal cavity is delimited by at least one internal surface defined by at least one wall of the thrust device. From the at least one wall of the thrust device, at least one heat dissipation element protrudes into the internal cavity, adapted to increase the extension of the at least one internal surface to evacuate heat accumulated by the at least one wall of the thrust device.

First claim

The invention claimed is:

1. A thrust device of a brake caliper for a disc brake, the thrust device comprising
a thrust device body adapted to be translated inside a guide device, said thrust device body defining an internal cavity at least partially open and facing towards an object to be pushed, including a brake pad associable with the thrust device, said internal cavity being delimited by at least one internal surface defined by at least one wall of the thrust device,
said at least one wall of said thrust device body is cup-shaped and comprises a bottom wall and at least one side wall made in a single piece,
wherein from said at least one wall of the thrust device at least one heat dissipation element protrudes into said internal cavity, adapted to increase an extension of said at least one internal surface to evacuate heat accumulated by said at least one wall of the thrust device,
wherein said at least one heat dissipation element comprises a plurality of column-shaped bodies, each body having an attachment end attached to said at least one side wall and a free end extending into said internal cavity.

2. The thrust device of claim 1 , wherein each said column-shaped body is of a cylindrical or conical shape.

3. The thrust device of claim 1 , wherein said at least one wall of the thrust device comprises an edge adapted to contact the brake pad associable with the thrust device, wherein said edge delimits at least one through opening for air passage, so as to allow passage of air from and towards said internal cavity, and said at least one through opening for air passage faces at least in a thrust device radial direction, so as to allow passage of air from and towards said internal cavity even when the thrust device is in contact with, or pushes the brake pad.

4. The thrust device of claim 1 , wherein said at least one wall of the thrust device comprises an edge adapted to contact the brake pad associable with the thrust device, wherein said edge delimits a plurality of through openings for air passage and/or forms a battlement so as to delimit a plurality of through openings for the air passage.

5. The thrust device of claim 1 , wherein said at least one wall has an extension in an axial direction shorter than the extension of each body of said at least one heat dissipation element, so that said at least one heat dissipation element comprises an abutting portion, adapted to contact the object to be pushed, avoiding said at least one wall to contact the object to be pushed associable with the thrust device.

6. The thrust device of claim 1 , wherein
said at least one heat dissipation element is made as a single piece with said at least one wall of the thrust device, and/or wherein
said at least one heat dissipation element is made by an additive manufacturing technique, or additive manufacturing.

7. The thrust device of claim 1 , wherein said thrust device is an electro-actuated piston and/or a piston sealingly housed in a cylinder of a hydraulic actuation cylinder-piston unit.

8. The thrust device of claim 1 , wherein said guide device is formed by a threaded member of a screw-nut mechanism and/or by a cylinder of a hydraulic actuation cylinder-piston unit.

9. A brake caliper comprising a caliper body and at least one thrust device comprising a thrust device body, adapted to be translated inside a guide device, said thrust device body defining an internal cavity at least partially open and facing towards an object to be pushed, including a brake pad associable with the thrust device; said internal cavity being delimited by at least one internal surface defined by at least one wall of the thrust device, said at least one wall of said thrust device body is cup-shaped and comprises a bottom wall and at least one side wall made in a single piece, wherein from said at least one wall of the thrust device at least one heat dissipation element protrudes into said internal cavity, adapted to increase an extension of said at least one internal surface to evacuate heat accumulated by said at least one wall of the thrust device,
wherein said at least one heat dissipation element comprises a plurality of axially gapped plates extending into said internal cavity.

10. The thrust device of claim 9 , wherein said plurality of axially gapped plates each is equipped with at least one through opening facing in an axial direction.

11. The thrust device of claim 9 , wherein said plurality of axially gapped plates each is equipped with a plurality of through openings.

12. The thrust device of claim 9 , wherein said plurality of axially gapped plates are each disc-like bodies.

13. A method for manufacturing a brake caliper thrust device for a disc brake, the method comprising:
providing a thrust device body defining an internal cavity at least partially open and delimited by at least one internal surface of at least one wall of the thrust device;
said at least one wall of said thrust device body is cup-shaped and comprises a bottom wall and at least one side wall made in a single piece,
welding on said at least one wall at least one heat dissipation element, said at least one heat dissipation element being adapted to increase the extension of said at least one internal surface to evacuate heat accumulated by said at least one wall of the thrust device,
wherein said at least one heat dissipation element comprises a plurality of circumferentially spaced axially extending rods in said internal cavity.

14. The method of claim 13 , wherein said at least one heat dissipation element comprises a body protruding into said internal cavity from said bottom wall, forming at least one portion placed at an opposite side with respect to a cavity opening, that faces axially towards an object to be pushed, including said brake pad associable with the thrust device, and a portion for attachment to the bottom wall which forms a connection with said bottom wall.

15. A method for manufacturing a brake caliper thrust device for a disc brake, the method comprising providing at least one thrust device by means of an additive manufacturing technique, or additive manufacturing, said thrust device comprising a thrust device body adapted to be translated inside a guide device, said thrust device body defining an internal cavity at least partially open and facing towards an object to be pushed, including a brake pad associable with the thrust device; said internal cavity being delimited by at least one internal surface defined by at least one wall of the thrust device,
said at least one wall of said thrust device body is cup-shaped and comprises a bottom wall and at least one side wall made in a single piece, wherein from said at least one wall of the thrust device at least one heat dissipation element protrudes into said internal cavity, adapted to increase an extension of said at least one internal surface to evacuate heat accumulated by said at least one wall of the thrust device,
wherein said at least one heat dissipation element is selected from the group of
a plurality of column-shaped bodies radially extending into said internal cavity,
a plurality of axially gapped plates extending into said internal cavity; and
a plurality of circumferentially spaced axially extending rods in said internal cavity.

Assignees

• Freni Brembo Spa

Inventors

• Arienti Roberto
• Comenduli Alberto
• Penati Daniele Angelo
• Odoni Andrea

Classifications

• F16D2125/06

  Pistons · CPC title

• B60T5/00 Primary

  Vehicle modifications to facilitate cooling of brakes · CPC title

• F16D2065/789

  External cooling ribs · CPC title

• F16D65/847 Primary

  with open cooling system, e.g. cooled by air · CPC title

• F16D65/78

  Features relating to cooling · CPC title