WO1999037010A1 - Modular actuator, and brake calliper comprising such actuator - Google Patents

Modular actuator, and brake calliper comprising such actuator Download PDF

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Publication number
WO1999037010A1
WO1999037010A1 PCT/NL1998/000033 NL9800033W WO9937010A1 WO 1999037010 A1 WO1999037010 A1 WO 1999037010A1 NL 9800033 W NL9800033 W NL 9800033W WO 9937010 A1 WO9937010 A1 WO 9937010A1
Authority
WO
WIPO (PCT)
Prior art keywords
actuator according
screw mechanism
module
screw
reduction gear
Prior art date
Application number
PCT/NL1998/000033
Other languages
French (fr)
Inventor
Hendrikus Jan Kapaan
Jacobus Zwarts
Andries Christian Rinsma
Johannes Albertus Van Winden
Clair Druet
Alexander Jan Carel De Vries
Armin Herbet Emil August Olschewski
Thomas Wilhelm Fucks
Original Assignee
Skf Engineering & Research Centre B.V.
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 Skf Engineering & Research Centre B.V. filed Critical Skf Engineering & Research Centre B.V.
Priority to EP98900769A priority Critical patent/EP1050098B1/en
Priority to PCT/NL1998/000033 priority patent/WO1999037010A1/en
Priority to CNB988136864A priority patent/CN1179466C/en
Priority to DE69810512T priority patent/DE69810512T2/en
Priority to JP2000540612A priority patent/JP2002510020A/en
Priority to AU55786/98A priority patent/AU5578698A/en
Priority to ES98900769T priority patent/ES2190056T3/en
Priority to US09/600,419 priority patent/US6367592B1/en
Priority to KR10-2000-7007952A priority patent/KR100527268B1/en
Publication of WO1999037010A1 publication Critical patent/WO1999037010A1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • 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
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • 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
    • F16D2055/0075—Constructional features of axially engaged brakes
    • F16D2055/0091—Plural actuators arranged side by side on the same side of the rotor
    • 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
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D2066/003—Position, angle or speed
    • 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
    • F16D2121/18—Electric or magnetic
    • F16D2121/24—Electric or magnetic using motors
    • 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
    • F16D2125/40—Screw-and-nut
    • 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
    • F16D2125/44—Mechanical mechanisms transmitting rotation
    • F16D2125/46—Rotating members in mutual engagement
    • F16D2125/48—Rotating members in mutual engagement with parallel stationary axes, e.g. spur gears
    • 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
    • F16D2125/44—Mechanical mechanisms transmitting rotation
    • F16D2125/46—Rotating members in mutual engagement
    • F16D2125/50—Rotating members in mutual engagement with parallel non-stationary axes, e.g. planetary gearing
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H2025/2062—Arrangements for driving the actuator
    • F16H2025/2075—Coaxial drive motors
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H2025/2062—Arrangements for driving the actuator
    • F16H2025/2087—Arrangements for driving the actuator using planetary gears
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers
    • F16H25/2252—Planetary rollers between nut and screw

Definitions

  • the invention is related to an actuator, comprising a housing, a motor, an actuating member and a screw mechanism providing a linear movement of the actuating member with respect to the housing in response to a rotational movement of the motor, which screw mechanism comprises a screw and a nut one of which is rotatably supported with respect to the housing by means of an angular bearing, and a reduction gear means.
  • Such actuator is known from WO-A-9603301.
  • Said known actuator which is a part of an electrically actuatable brake calliper for a disc brake, comprises a roller screw mechanism and a satellite gear wheel mechanism.
  • the screw mechanism is accommodated partly within an electric motor.
  • the end of said screw mechanism which protrudes from the electric motor towards the brake pads, carries an integrated thrust bearing as well as an integrated satellite gear wheel mechanism.
  • the satellite gear wheel system is positioned around the screw mechanism. This position leads to rather big radial dimensions of the satellite gear wheel system, whereby the stiffness of said system is reduced and the operational deflections are increased. Thus, the required transmission stiffness cannot be maintained.
  • this known actuator is rather complicated and therefore rather cumbersome with respect to manufacturing.
  • a further drawback of the complicated integrated structure of the prior art actuator is related to the area of manufacturing. Usually, manufacturing of rolling mechanisms such as the rolling bearing and the screw mechanism require a different background than manufacturing gear systems. As these components are integrated to a considerable degree in the prior art actuator, problems may arise as to the proper selection of combined required different manufacturing technologies and the proper control of these manufacturing processes.
  • the object of the invention is therefore to provide an actuator which does not have these disadvantages. This object is achieved in that the actuating member and the reduction gear means are situated at opposite ends of the screw mechanism.
  • the reduction gear means is at a different position than the screw mechanism, which has several advantages. For instance, such position is less subject to space constraints. Furthermore, the reduction gear means is at a distance from the actuating member, which allows more space and freedom of design for those components. According to a further important advantage of the invention, the actuator can now be carried out in such a way that the reduction gear means is contained in a reduction gear module and the screw mechanism is contained in a screw mechanism module. According to a preferred embodiment said reduction gear module and screw mechanism module are interconnected through a drive module.
  • the drive module may be at the end of the reduction gear module facing away from the screw mechanism module.
  • the modular layout of the several components which make up the drive line of the actuator enables the application of dedicated required manufacturing technologies and processes for each individual component of the entire system. Also, the modular design opens ways for parallel production of components, leading to a more streamlined and cost effective production process.
  • the said components may be united in pre-assembled sub-units.
  • the reduction gear module and the screw mechanism module are integrated, or the screw mechanism module and the drive module are integrated.
  • the layout of the several modules may be designed such that at least two modules are axial ly aligned, or that at least two modules are axially shifted or excentric with respect to each other.
  • the screw mechanism module may comprise an angular contact bearing.
  • Said bearing may be supported within the housing in different ways.
  • the outer ring of the angular contact bearing rests against the radial surface of the inwardly protruding flange facing away from the brake pads, said outer ring and flange being held against each other by means of bolts under tension.
  • the outer ring of the angular contact bearing rests against a radial surface of the inwardly protruding flange which faces towards the brake pads.
  • the outer ring is pressed firmly onto said flange under the influence of the actuating forces, which means that such construction can do without highly loaded bolts.
  • the reduction gear module may comprise at least part of a planetary gear system having a stationary outer ring gear with inwardly pointing gear teeth.
  • the reduction gear module may comprise satellite gear wheels which mesh with the ring gear and which are accommodated on a carrier connected to a rotary shaft engaging the screw mechanism, and the sunwheel of the planetary gear system may be accommodated on a drive shaft of the drive module.
  • a sensor may be provided for detecting rotational and/or translational movements of the screw mechanism.
  • control means may be provided, said control means having an input for a control signal, e.g. from a brake pedal, and being connected to the sensor for controlling the electric motor on the basis of the control signal and the signal from the sensor.
  • the sensor is in particular suitable for obtaining force feedback, wear compensation and/or maintenance indication.
  • the actuator according to the invention can be applied for different purposes.
  • the actuator is suitable for use in a brake calliper for an electrically actuatable disc brake, said calliper comprising an actuator as described before, and a claw piece carrying two opposite brake pads, said actuator comprising a screw and a nut one of which is rotatably supported with respect to the housing by means of an angular bearing, and a reduction gear means.
  • Figure 1 shows a first embodiment of a brake calliper.
  • Figure 2 shows a brake calliper according to figure 1 in exploded view.
  • Figure 3 shows a second embodiment of a brake calliper.
  • Figure 4 shows a brake calliper according to figure 3 in exploded view.
  • the brake calliper as shown in figures 1 and 2 comprises a claw piece 1, a screw mechanism module 2, a drive module 3, a reduction gear module 63, and an electric motor 5.
  • the claw piece 1 comprises an outer flange 6, onto which a brake pad 7 has been mounted, and an inner flange 8. Furthermore, there is another brake pad 9, as well as a brake disc 10 situated between the brake pads 7 and 9.
  • the modules 2, 3 and 63 or sub-assemblies thereof, can be pre- assembled into a sealed and lubricated actuating unit, which can be fitted in the brake calliper by means of bolts.
  • the drive module 3 is at the end of the reduction gear module 63 facing away from the screw mechanism module 2.
  • the actuating member is in the shape of a piston 60 which is accommodated within the cylindrical space 64 of the screw mechanism module 2.
  • This screw mechanism module 2 comprises a screw 61 and a nut 62 engaging each other by means of rollers 35.
  • the reduction gear module 63 moreover has two reduction steps.
  • the first step comprises sun gear wheel 31, satellite gear wheel 32 and ring gear wheel 33 mounted within bushing 80.
  • the satellite gear wheels 32 are mounted on a carrier 24 which also carries a second sun gear wheel 65.
  • This second sun gear wheel 65 engages satellite gear wheels 66, mounted on carrier 68.
  • the satellite gear wheels engage ring gear wheel 67 mounted within the bushing 80.
  • the carrier 68 is connected to screw 61 of the screw mechanism module 2.
  • the calliper according to figures 1 and 2 is assembled by sliding the actuator 6 from the left hand side into the cylindrical space 64, after mounting the reduction gear module 63 from the same side. Subsequently, the drive module 5 is mounted from the opposite side, to the claw piece 1, with interposition of sealing ring 81.
  • the drive module 5 is fixed by means of screw 72, which engages screw threaded holes 73 in claw piece 1.
  • the embodiment of a calliper according to figures 3 and 4 largely corresponds to the calliper according to figures 1 and 2.
  • the drive module 3 comprising motor 5, is at the end of the reduction gear module 63 facing away from the screw mechanism module 2.
  • the reduction gear module 63 comprises a partition element 81, provided with a ring gear wheel 33.
  • the partition element 81 has an outer screw thread 76, which engages the inner screw thread 77 of claw piece 1.
  • the reduction gear mechanism module 63 comprises only one reduction step, the sun gear wheel 31 being supported on the drive shaft 28 of the drive module 3.

Abstract

An actuator comprises a housing, a motor (5), an actuating member (60) and a screw mechanism providing (2) a linear movement of the actuating member (60) with respect to the housing in response to a rotational movement of the motor (5), which screw mechanism (2) comprises a screw (61) and a nut (62) one of which is rotatably supported with respect to the housing by means of an angular contact bearing (14), and a reduction gear means (63). The actuating member (60) and the reduction gear means (63) are situated at opposite ends of the screw mechanism (2).

Description

Modular actuator, and brake calliper comprising such actuator
The invention is related to an actuator, comprising a housing, a motor, an actuating member and a screw mechanism providing a linear movement of the actuating member with respect to the housing in response to a rotational movement of the motor, which screw mechanism comprises a screw and a nut one of which is rotatably supported with respect to the housing by means of an angular bearing, and a reduction gear means. Such actuator is known from WO-A-9603301. Said known actuator, which is a part of an electrically actuatable brake calliper for a disc brake, comprises a roller screw mechanism and a satellite gear wheel mechanism. The screw mechanism is accommodated partly within an electric motor. The end of said screw mechanism which protrudes from the electric motor towards the brake pads, carries an integrated thrust bearing as well as an integrated satellite gear wheel mechanism.
The satellite gear wheel system is positioned around the screw mechanism. This position leads to rather big radial dimensions of the satellite gear wheel system, whereby the stiffness of said system is reduced and the operational deflections are increased. Thus, the required transmission stiffness cannot be maintained. Moreover, as a result of this layout, this known actuator is rather complicated and therefore rather cumbersome with respect to manufacturing. A further drawback of the complicated integrated structure of the prior art actuator is related to the area of manufacturing. Usually, manufacturing of rolling mechanisms such as the rolling bearing and the screw mechanism require a different background than manufacturing gear systems. As these components are integrated to a considerable degree in the prior art actuator, problems may arise as to the proper selection of combined required different manufacturing technologies and the proper control of these manufacturing processes.
The object of the invention is therefore to provide an actuator which does not have these disadvantages. This object is achieved in that the actuating member and the reduction gear means are situated at opposite ends of the screw mechanism.
In the actuator according to the invention, the reduction gear means is at a different position than the screw mechanism, which has several advantages. For instance, such position is less subject to space constraints. Furthermore, the reduction gear means is at a distance from the actuating member, which allows more space and freedom of design for those components. According to a further important advantage of the invention, the actuator can now be carried out in such a way that the reduction gear means is contained in a reduction gear module and the screw mechanism is contained in a screw mechanism module. According to a preferred embodiment said reduction gear module and screw mechanism module are interconnected through a drive module.
The drive module may be at the end of the reduction gear module facing away from the screw mechanism module.
The modular layout of the several components which make up the drive line of the actuator, enables the application of dedicated required manufacturing technologies and processes for each individual component of the entire system. Also, the modular design opens ways for parallel production of components, leading to a more streamlined and cost effective production process.
Nevertheless, after manufacturing the said components in this way, they may be united in pre-assembled sub-units. For instance, the reduction gear module and the screw mechanism module are integrated, or the screw mechanism module and the drive module are integrated.
The layout of the several modules may be designed such that at least two modules are axial ly aligned, or that at least two modules are axially shifted or excentric with respect to each other.
In order to better accommodate the loadings on the actuating member, the screw mechanism module may comprise an angular contact bearing.
Said bearing may be supported within the housing in different ways. According to a first possibility, the outer ring of the angular contact bearing rests against the radial surface of the inwardly protruding flange facing away from the brake pads, said outer ring and flange being held against each other by means of bolts under tension.
According to a second possibility, the outer ring of the angular contact bearing rests against a radial surface of the inwardly protruding flange which faces towards the brake pads. In this embodiment, the outer ring is pressed firmly onto said flange under the influence of the actuating forces, which means that such construction can do without highly loaded bolts.
The reduction gear module may comprise at least part of a planetary gear system having a stationary outer ring gear with inwardly pointing gear teeth. In particular, the reduction gear module may comprise satellite gear wheels which mesh with the ring gear and which are accommodated on a carrier connected to a rotary shaft engaging the screw mechanism, and the sunwheel of the planetary gear system may be accommodated on a drive shaft of the drive module. Furthermore, a sensor may be provided for detecting rotational and/or translational movements of the screw mechanism. Also, control means may be provided, said control means having an input for a control signal, e.g. from a brake pedal, and being connected to the sensor for controlling the electric motor on the basis of the control signal and the signal from the sensor. The sensor is in particular suitable for obtaining force feedback, wear compensation and/or maintenance indication.
The actuator according to the invention can be applied for different purposes. In particular, the actuator is suitable for use in a brake calliper for an electrically actuatable disc brake, said calliper comprising an actuator as described before, and a claw piece carrying two opposite brake pads, said actuator comprising a screw and a nut one of which is rotatably supported with respect to the housing by means of an angular bearing, and a reduction gear means. The invention will now be described further with reference to several embodiments of brake callipers, containing an actuator according to the invention.
Figure 1 shows a first embodiment of a brake calliper.
Figure 2 shows a brake calliper according to figure 1 in exploded view.
Figure 3 shows a second embodiment of a brake calliper.
Figure 4 shows a brake calliper according to figure 3 in exploded view.
The brake calliper as shown in figures 1 and 2 comprises a claw piece 1, a screw mechanism module 2, a drive module 3, a reduction gear module 63, and an electric motor 5. The claw piece 1 comprises an outer flange 6, onto which a brake pad 7 has been mounted, and an inner flange 8. Furthermore, there is another brake pad 9, as well as a brake disc 10 situated between the brake pads 7 and 9.
The modules 2, 3 and 63 or sub-assemblies thereof, can be pre- assembled into a sealed and lubricated actuating unit, which can be fitted in the brake calliper by means of bolts.
The drive module 3 is at the end of the reduction gear module 63 facing away from the screw mechanism module 2. The actuating member is in the shape of a piston 60 which is accommodated within the cylindrical space 64 of the screw mechanism module 2. This screw mechanism module 2 comprises a screw 61 and a nut 62 engaging each other by means of rollers 35.
The reduction gear module 63 moreover has two reduction steps. The first step comprises sun gear wheel 31, satellite gear wheel 32 and ring gear wheel 33 mounted within bushing 80. The satellite gear wheels 32 are mounted on a carrier 24 which also carries a second sun gear wheel 65. This second sun gear wheel 65 engages satellite gear wheels 66, mounted on carrier 68. Moreover, the satellite gear wheels engage ring gear wheel 67 mounted within the bushing 80. The carrier 68 is connected to screw 61 of the screw mechanism module 2.
The calliper according to figures 1 and 2 is assembled by sliding the actuator 6 from the left hand side into the cylindrical space 64, after mounting the reduction gear module 63 from the same side. Subsequently, the drive module 5 is mounted from the opposite side, to the claw piece 1, with interposition of sealing ring 81.
The drive module 5 is fixed by means of screw 72, which engages screw threaded holes 73 in claw piece 1.
The embodiment of a calliper according to figures 3 and 4 largely corresponds to the calliper according to figures 1 and 2. Again, the drive module 3 comprising motor 5, is at the end of the reduction gear module 63 facing away from the screw mechanism module 2.
The reduction gear module 63 comprises a partition element 81, provided with a ring gear wheel 33. The partition element 81 has an outer screw thread 76, which engages the inner screw thread 77 of claw piece 1.
By screwing the partition element 81 onto the claw piece 1, the angular contact ball bearing 14 is preloaded and held in place. The reduction gear mechanism module 63 comprises only one reduction step, the sun gear wheel 31 being supported on the drive shaft 28 of the drive module 3.
By means of bolts 72 and screwthreaded holes 73, the drive module 3 and the claw piece 1 are held together.

Claims

Claims
1. Actuator, comprising a housing, a motor, an actuating member (60) and a screw mechanism (2) providing a linear movement of the actuating member with respect to the housing in response to a rotational movement of the motor (5), which screw mechanism comprises a screw (61) and a nut (62) one of which is rotatably supported with respect to the housing by means of an angular contact bearing (14), and a reduction gear means (63), characterized in that the actuating member (11, 12, 60) and the reduction gear means (63) are situated at opposite ends of the screw mechanism (2).
2. Actuator according to claim 1, wherein the reduction gear means is contained in a reduction gear module (63) and the screw mechanism is contained in a screw mechanism module (2).
3. Actuator according to claim 2, wherein the drive module (3) is at the end of the reduction gear module (63) facing away from the screw mechanism module (2).
4. Actuator according to any of claims 1-3, wherein the actuating member is a piston (60), which is slidably held within a cylinder space (64) of the housing.
5. Actuator according to claim 4, wherein the piston (60) is held non-rotatably by means of a groove (71) and pin (70) assembly.
6. Actuator according to claim 4 or 5, wherein the screw mechanism module (2) is at least partly contained in the piston (60).
7. Actuator according to any of claims 2-6 wherein the reduction gear module (63) and the screw mechanism module (2) are integrated.
8. Actuator according to any of claims 2-7, wherein the screw mechanism module (2) and the drive module (3) are integrated.
9. Actuator according to any of claims 2-8, wherein at least two modules (2, 3, 63) are axially aligned.
10. Actuator according to any of claims 2-9, wherein at least two modules (2, 3, 63) are laterally shifted or excentric with respect to each other.
11. Actuator according to claim 10, wherein the drive module (3) engage3Ss two laterally shifted screw mechanism modules (2).
12. Actuator according to any of claims 2-11, wherein the screw mechanism module (2) comprises the angular contact bearing (14), the outer ring (15) of which bearing resting against an inwardly protruding flange (8) of the housing (1).
13. Actuator according to claim 12, wherein the outer ring (15) of the angular contact bearing (14) rests against the radial surface (36) of the inwardly protruding flange (8) facing away from the brake pads (7, 9), said outer ring (15) and flange (8) being held against each other by means of bolts under tension.
14. Actuator according to claim 13, wherein the outer ring (15) of the angular contact bearing (14) rests against a radial surface
(41) of the inwardly protruding flange (8) which faces towards the brake pads (7, 9).
15. Actuator according to any of claims 2-14, wherein the nut (62) of the screw mechanism is rotatably supported by means of the angular contact bearing (14), and the screw (61) is held against rotating.
16. Actuator according to any of the preceding claims, wherein the reduction gear module (4) comprises a non rotatable rod or shaft which protrudes in a bore provided in the screw (61) of the screw mechanism module (2), said screw (17) and rod being connected mutually slidable and non-rotatable.
17. Actuator according to claim 16, wherein said rod has through- going, central channel for relubrieating the screw mechanism.
18. Actuator according any of claims 2-17, wherein the reduction gear module (63) comprises at least part of a planetary gear system having a stationary outer ring gear (33) with inwardly pointing gear teeth .
19. Actuator according to claim 18, wherein the reduction gear module (63) comprises satellite gear wheels (32) which mesh with the ring gear (33) and which are accommodated on a carrier connected to the shaft (24) engaging the screw mechanism (2).
20. Actuator according to claim 19, wherein the sun wheel (31) of the planetary gear system is accommodated on a drive shaft (28) of the drive module (3).
21. Actuator according to any of the preceding claims, wherein the angular contact bearing (14) is a four-point angular contact ball bearing or a taper roller bearing.
22. Actuator according to any of the preceding claims, wherein a sensor (43) is provided for detecting rotational and/or translational movements of the screw mechanism (2).
23. Actuator according to claim 22, wherein control means are provided, said control means having an input for a control signal, e.g. from a brake pedal, and being connected to the sensor for controlling the electric motor on the basis of the control signal and the signal from the sensor.
24. Actuator according to any of the preceding claims, wherein the screw mechanism (2) is a roller screw mechanism, a ball screw or a differential screw.
25. Actuator according to claim 24, wherein the rollers (35) or balls of the screw mechanism (2) are coated so as to maintain the proper function of the screw under dry-running conditions such as a diamond-like carbon coating.
26. Actuator according to any of the preceding claims, wherein the motor is an electric motor (5).
27. Actuator according to any of claims 1-25, wherein the motor is a hydraulic motor.
28. Actuator according to any of claims 1-25, wherein the motor is a pneumatic motor.
29. Reduction gear module for use in the actuator according to any of claims 2-28.
30. Screw mechanism module for use in the actuator according to any of claims 2-28.
31. Drive module for use in the actuator according to any of claims 2-28.
32. Brake calliper for an electrically actuatable disc brake, said calliper comprising an actuator according to any of the preceding claims 1-27, and a claw piece carrying two opposite brake pads, said actuator comprising a screw and a nut one of which is rotatably supported with respect to the housing by means of an angular contact bearing, and a reduction gear means.
PCT/NL1998/000033 1998-01-20 1998-01-20 Modular actuator, and brake calliper comprising such actuator WO1999037010A1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP98900769A EP1050098B1 (en) 1998-01-20 1998-01-20 Modular actuator, and brake calliper comprising such actuator
PCT/NL1998/000033 WO1999037010A1 (en) 1998-01-20 1998-01-20 Modular actuator, and brake calliper comprising such actuator
CNB988136864A CN1179466C (en) 1998-01-20 1998-01-20 Modular actuator, and brake calliper comprising such actuator
DE69810512T DE69810512T2 (en) 1998-01-20 1998-01-20 MODULAR ACTUATING DEVICE, AND CALIPER WITH SUCH AN ACTUATING DEVICE
JP2000540612A JP2002510020A (en) 1998-01-20 1998-01-20 Brake caliper with modular actuator and actuator
AU55786/98A AU5578698A (en) 1998-01-20 1998-01-20 Modular actuator, and brake calliper comprising such actuator
ES98900769T ES2190056T3 (en) 1998-01-20 1998-01-20 MODULAR PERFECTED DEVICE AND BRAKE SHOE UNDERSTANDING SUCH ACTUATOR.
US09/600,419 US6367592B1 (en) 1998-01-20 1998-01-20 Modular actuator, and brake caliper comprising such actuator
KR10-2000-7007952A KR100527268B1 (en) 1998-01-20 1998-01-20 Modular actuator and brake calliper comprising such actuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NL1998/000033 WO1999037010A1 (en) 1998-01-20 1998-01-20 Modular actuator, and brake calliper comprising such actuator

Publications (1)

Publication Number Publication Date
WO1999037010A1 true WO1999037010A1 (en) 1999-07-22

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ID=19866429

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1998/000033 WO1999037010A1 (en) 1998-01-20 1998-01-20 Modular actuator, and brake calliper comprising such actuator

Country Status (9)

Country Link
US (1) US6367592B1 (en)
EP (1) EP1050098B1 (en)
JP (1) JP2002510020A (en)
KR (1) KR100527268B1 (en)
CN (1) CN1179466C (en)
AU (1) AU5578698A (en)
DE (1) DE69810512T2 (en)
ES (1) ES2190056T3 (en)
WO (1) WO1999037010A1 (en)

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KR20010034267A (en) 2001-04-25
JP2002510020A (en) 2002-04-02
CN1179466C (en) 2004-12-08
EP1050098A1 (en) 2000-11-08
KR100527268B1 (en) 2005-11-09
ES2190056T3 (en) 2003-07-16
EP1050098B1 (en) 2003-01-02
DE69810512D1 (en) 2003-02-06
DE69810512T2 (en) 2003-10-02
AU5578698A (en) 1999-08-02
US6367592B1 (en) 2002-04-09
CN1285088A (en) 2001-02-21

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