GB2365087A - Wedge operated ball brake actuated by a lever and camshaft - Google Patents

Wedge operated ball brake actuated by a lever and camshaft Download PDF

Info

Publication number
GB2365087A
GB2365087A GB0117437A GB0117437A GB2365087A GB 2365087 A GB2365087 A GB 2365087A GB 0117437 A GB0117437 A GB 0117437A GB 0117437 A GB0117437 A GB 0117437A GB 2365087 A GB2365087 A GB 2365087A
Authority
GB
United Kingdom
Prior art keywords
plates
wedge
brake
camshaft
members
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.)
Granted
Application number
GB0117437A
Other versions
GB0117437D0 (en
GB2365087B (en
Inventor
Michel Savignac
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Titan Italia SpA
Original Assignee
Titan Italia SpA
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 Titan Italia SpA filed Critical Titan Italia SpA
Publication of GB0117437D0 publication Critical patent/GB0117437D0/en
Publication of GB2365087A publication Critical patent/GB2365087A/en
Application granted granted Critical
Publication of GB2365087B publication Critical patent/GB2365087B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
    • B60T1/065—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels employing disc
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/04—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by moving discs or pads away from one another against radial walls of drums or cylinders
    • F16D55/14—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by moving discs or pads away from one another against radial walls of drums or cylinders with self-tightening action, e.g. by means of coacting helical surfaces or balls and inclined surfaces
    • F16D55/16—Mechanically-actuated brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/22—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for pressing members apart, e.g. for drum brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/14—Mechanical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/22—Mechanical mechanisms converting rotation to linear movement or vice versa acting transversely to the axis of rotation
    • F16D2125/28—Cams; Levers with cams
    • F16D2125/32—Cams; Levers with cams acting on one cam follower
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/36—Helical cams, Ball-rotating ramps

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Braking Arrangements (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

A motor-vehicle brake comprises two facing plates 11,12 capable of moving away from each other to brake discs. Balls 13 housed in ramp seats 14 are interposed between the plates to produce moving away of the plates upon mutual relative rotation of the plates. Each plate has a radially projection 16,17, and the brake has a wedge-shaped element 18 between and acting on the projections to cause the relative rotation of the plates upon pulling of the wedge-shaped element 18 outwardly of the plates. The wedge-shaped element 18 has a shank 34 extending outwardly of the plates which is rotatably mounted on a camshaft (31, fig 2) driven in rotation by an operating lever 32. Sprung running balls 19,20 may be disposed between the wedge-shaped element and the projections. The operating angular position of the lever 32 on the camshaft 31 may be selected.

Description

2365087 WEDGE BRAKE WITH AN IMPROVED CONTROL The present invention relates
to a brake for motorvehicles of the so- called "ramp-and-ball type" and, in 5 particular, of the type operated by a wedge. In such a type of brake, two plates are disposed in faced relationship with each other with interposition of balls that are housed in appropriate shaped seats formed in the plates themselves. The brake is operated by the action of a wedge-shaped element to cause rotation in opposite ways of the two plates so that the balls, by running towards regions of the seats of less depth, cause the plates to move away from each other, which will bring about compression of the braking discs that are disposed on the outer plate faces. in these known brakes, operation is obtained by a hydraulically or pneumatically driven tie-rod which is directly connected to the wedge for pulling it in a direction radial to the plates. This however involves disadvantages in operation also from the point of view of mechanical efficiency, in addition to the impossibility of using wedge brakes (generally in an oil bath) when hydraulic or pneumatic energy is not available. it is a general aim of the present invention to obviate the above mentioned drawbacks by providing a brake of the above described general type but with a different kinematic drive mechanism, more flexible and kinematically more advantageous. In view of the above aim, in accordance with the invention, 2 a brake for motor-vehicles has been conceived which comprises two facing control led-pres sure plates of discs carrying out braking on moving away from each other, balls housed in ramp seats being interposed between the plates to cause said moving away of the plates upon the mutual relative rotation of the plates in opposite directions, each plate having a radially- projecting operating fin and being provided with a wedge-shaped element disposed between the fins and acting on the fins to cause the opposite rotation of the plates on pulling of the wedge-shaped element outwardly of the plates, characterised in that the wedge-shaped element has a shank extending outwardly of the plates which is rotatably mounted on a camshaft driven in rotation by an operating lever.
For better explaining the innovative principles of the present invention and the advantages it offers over the known art, a possible embodiment applying these principles will be described hereinafter, by way of nonlimiting example, with the aid of the accompanying drawings. In the drawings: - Fig. 1 is a diagrammatic front view of the brake in accordance with the invention; - Fig. 2 is a cross-section view taken along line II-II in Fig. 1.
With reference to the drawings, therein shown is a brake generally denoted by 10, comprising a pair of plates 11, 12 facing each other upon interposition of balls 13 received in ramp seats 14 formed in the facing surfaces of the plates. The plates are maintained close to each other by 3 means of springs 15 disposed therebetween. An operating fin 16, 17 projects radially of each plate. A wedge-shaped element 18 is located between the operating fins, which element, when moved radially outwardly, moves the two operating fins apart due to running of balls 19, 20 in appropriate cam races 211 22 laterally present in the wedge-shaped element. Balls 19, 20 are also partly received in appropriate races 23, 24 present in the operating fins. Springs 25, 26 can be advantageously provided to keep balls.
19, 20 pushed towards the brake axis. It is apparent that upon pulling of the wedge outwardly, the plates are urged to rotate and move away from each other, so as to cause compression of braking surfaces 27, 28 (formed by appropriate braking discs or disc packs) as shown in Fig. 2. The braking surfaces are only diagrammatically shown as they are well known to a person skilled in the art. As viewed from Fig. 1, during braking an excessive rotation of the plates is prevented by abutment fins 29, 30 reacting on appropriate fixed reaction surfaces. For movement of the wedge, the wedge itself has a shank 34 projecting from the fins and rotatably mounted on a camshaft 31 driven in rotation by a lever 32 acted upon by a force 33. Lever 32 is mounted on shaft 31 in such a manner that its angular position can be selected depending on practical requirements. In this way the force 33 is not required to be radial to the brake, which was compulsory in brakes of the prior art, but it can be directed in any direction in a plane transverse to shaft 31, through a suitable mounting
4 of the lever. At this point it is apparent that the intended aims have been reached by providing a ramp brake with a more flexible operation and kinematically more advantageous as compared 5 with brakes of the known art. Obviously, the above description of an embodiment applying the innovative principles of the present invention is reproduced by way of example only and therefore must not be considered as a limitation of the patent rights as herein 10 claimed.

Claims (4)

1. A brake for motor vehicles- comprising two facing pressure-controlled members for effecting braking, balls housed between ramp seats in the members that facilitate moving apart of the members upon their relative rotation in opposite directions, a projection extending radially outwardly from each member, and a wedge- shaped element disposed between the projections that, upon displacement in one sense, acts on a projection to cause said relative rotation of the members, characterised in that the wedgeshaped element has a shank extending outwardly with respect to the members that is rotatably mounted on a camshaft rotatable by an operating lever.
is
2. A brake as claimed in claim 1, characterised in that running balls are disposed between the projections and the wedge-shaped element.
3. A brake as claimed in claim 2J. characterised in that running balls are urged inwardly of the members by means of springs.
4. A brake as claimed in claim 1 1 2 or 3, characterised in that the operating lever is mounted on the camshaft so that its position can be angularly modified in a plane transverse to the camshaft, to vary the direction of the force required to actuate the operating lever.
GB0117437A 2000-07-19 2001-07-18 Wedge brake with an improved control Expired - Fee Related GB2365087B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2000MI000426 IT249853Y1 (en) 2000-07-19 2000-07-19 WEDGE BRAKE WITH IMPROVED CONTROL

Publications (3)

Publication Number Publication Date
GB0117437D0 GB0117437D0 (en) 2001-09-12
GB2365087A true GB2365087A (en) 2002-02-13
GB2365087B GB2365087B (en) 2004-09-15

Family

ID=11444314

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0117437A Expired - Fee Related GB2365087B (en) 2000-07-19 2001-07-18 Wedge brake with an improved control

Country Status (4)

Country Link
DE (1) DE20111567U1 (en)
FR (1) FR2812049B1 (en)
GB (1) GB2365087B (en)
IT (1) IT249853Y1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006060763A1 (en) * 2006-12-21 2008-06-26 Siemens Ag Wedge brake, for a vehicle belt, has a setting mechanism with an actuator as a limit stop for the radial projection on a rotating component

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006060753A1 (en) * 2006-12-21 2008-07-10 Siemens Ag Brake used as a self-energizing brake comprises an actuating mechanism with a first wedge mechanism producing a force acting in the radial direction and a second wedge mechanism which deviates the force into an axial direction
GB2567196B (en) * 2017-10-05 2019-10-02 Fpw Axles Ltd A Steering Axle Assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB986525A (en) * 1961-01-23 1965-03-17 Lambert & Brake Corp Disc brakes
GB2067692A (en) * 1980-01-04 1981-07-30 Lucas Industries Ltd Improvements in disc brakes for vehicles
JPS58137630A (en) * 1982-02-10 1983-08-16 Miyako Brake Seizo Kk Disc brake
EP0097447A1 (en) * 1982-06-12 1984-01-04 LUCAS INDUSTRIES public limited company Improvements in disc brakes for vehicles
GB2195406A (en) * 1986-08-05 1988-04-07 Akebono Brake Ind A brake device
EP0522761A1 (en) * 1991-07-06 1993-01-13 Lucas Industries Public Limited Company Liquid-immersed disc brake

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR887668A (en) * 1942-02-02 1943-11-19 Su Ddeutsche Arguswerke Heinri Disc brake
IT1258309B (en) * 1992-04-10 1996-02-22 BALL BRAKE WITH WEDGE OPERATION

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB986525A (en) * 1961-01-23 1965-03-17 Lambert & Brake Corp Disc brakes
GB2067692A (en) * 1980-01-04 1981-07-30 Lucas Industries Ltd Improvements in disc brakes for vehicles
JPS58137630A (en) * 1982-02-10 1983-08-16 Miyako Brake Seizo Kk Disc brake
EP0097447A1 (en) * 1982-06-12 1984-01-04 LUCAS INDUSTRIES public limited company Improvements in disc brakes for vehicles
GB2195406A (en) * 1986-08-05 1988-04-07 Akebono Brake Ind A brake device
EP0522761A1 (en) * 1991-07-06 1993-01-13 Lucas Industries Public Limited Company Liquid-immersed disc brake

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006060763A1 (en) * 2006-12-21 2008-06-26 Siemens Ag Wedge brake, for a vehicle belt, has a setting mechanism with an actuator as a limit stop for the radial projection on a rotating component

Also Published As

Publication number Publication date
ITMI20000426U1 (en) 2002-01-19
FR2812049A1 (en) 2002-01-25
IT249853Y1 (en) 2003-06-05
FR2812049B1 (en) 2004-07-02
GB0117437D0 (en) 2001-09-12
DE20111567U1 (en) 2001-10-11
GB2365087B (en) 2004-09-15
ITMI20000426V0 (en) 2000-07-19

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20180718