WO2003052286A1 - A parking brake arrangement in an electrically operated brake - Google Patents

A parking brake arrangement in an electrically operated brake Download PDF

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Publication number
WO2003052286A1
WO2003052286A1 PCT/SE2002/002363 SE0202363W WO03052286A1 WO 2003052286 A1 WO2003052286 A1 WO 2003052286A1 SE 0202363 W SE0202363 W SE 0202363W WO 03052286 A1 WO03052286 A1 WO 03052286A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
spring
elasticity
arrangement according
transmission sleeve
Prior art date
Application number
PCT/SE2002/002363
Other languages
French (fr)
Inventor
Lars Severinsson
Original Assignee
Haldex Brake Products Ab
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 Haldex Brake Products Ab filed Critical Haldex Brake Products Ab
Priority to JP2003553143A priority Critical patent/JP2005513366A/en
Priority to AU2002359156A priority patent/AU2002359156A1/en
Priority to DE60209549T priority patent/DE60209549T2/en
Priority to EP02793669A priority patent/EP1456554B1/en
Publication of WO2003052286A1 publication Critical patent/WO2003052286A1/en
Priority to US10/869,144 priority patent/US20050016799A1/en

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Classifications

    • 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
    • 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
    • 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
    • F16D2123/00—Multiple operation forces
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/58—Mechanical mechanisms transmitting linear movement
    • F16D2125/582—Flexible element, e.g. spring, other than the main force generating element
    • 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
    • F16D2125/58—Mechanical mechanisms transmitting linear movement
    • F16D2125/582—Flexible element, e.g. spring, other than the main force generating element
    • F16D2125/585—Flexible element, e.g. spring, other than the main force generating element arranged in parallel with a force-applying member
    • 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
    • F16D2127/00—Auxiliary mechanisms
    • F16D2127/06—Locking mechanisms, e.g. acting on actuators, on release mechanisms or on force transmission 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
    • F16D2129/00—Type of operation source for auxiliary mechanisms
    • F16D2129/06—Electric or magnetic
    • F16D2129/08—Electromagnets

Definitions

  • the present invention relates to a parking brake arrangement in an electrically operated brake, in which a rotary movement of an electric motor is transformed into a translational brake applying movement.
  • an electric drive motor as the means for operating a brake actuator for a vehicle.
  • this electric motor is used for operating a disc brake, especially but not exclusively for a heavy road vehicle, such as a truck, trailer, or bus.
  • This disc brake contains means for transforming the rotational movement of the electric motor into a translational movement of a brake pad.
  • the electric motor can be used not only for service braking but also for parking braking. In the latter case the brake is applied by the electric motor to a force which is suitable for safely holding the vehicle in the parked position and is held in this applied condition.
  • a problem may, however, be encountered in that the brake disc and certain portions of the disc brake may have been heated to considerable temperatures during the preceding service braking.
  • the heated members gradually cool off and return to normal size after their heat expansion, the parking brake force may decrease to such a level that the safe parking braking may be jeopardized.
  • the problem of ensuring a satisfactory parking braking when the heated members cool off may according to the invention be solved by an elasticity spring, which is so arranged in the force transmitting chain that its elasticity is in series with the elasticity of the brake and is adapted to provide a rotary parking brake force.
  • the elasticity spring is preferably loaded at a service brake application of the brake and then locked until released for parking brake application.
  • a practical embodiment is characterized in that a transmission sleeve rotatably biased by the elasticity spring is rotatably arranged in the rotary force transmitting chain in the housing of the brake and is held to the housing at service braking but is disengaged therefrom at parking braking.
  • the force of the elasticity spring is transmitted via the transmission sleeve to the brake pad only at parking braking.
  • the elasticity spring may provide a force which is suitable for parking braking.
  • a locking rod which is arranged in the housing for engagement with the transmission sleeve by means of an electromagnet and disengagement therefrom by means of a compression spring.
  • the elasticity spring may either be a compression spring connected to the transmission sleeve by means of a sleeve arm or a clock spring or spiral spring arranged in the housing with its outer end attached to the housing and its inner end attached to the transmission sleeve.
  • Fig 1 is a sectional side-view and Fig 2 is a section along the line II-II in Fig 1 of a first embodiment of an electric disc brake according to the invention
  • Fig 3 is a sectional side-view and
  • Fig 4 is a section along the line IV-IV in Fig 3 of a second embodiment of an electric disc brake according to the invention
  • FIG 5 is a sectional side-view and Fig 6 is a section along the line VI-VI in Fig 5 of a third embodiment of an electric disc brake according to the invention.
  • a disc brake according to the invention is very schematically shown in Fig 1.
  • a disc brake caliper or housing 1 is to be mounted astraddle of a brake disc 2 on a vehicle axle.
  • the vehicle is preferably but not exclusively a heavy road vehicle, such as a bus, a truck, or a trailer.
  • An electric motor 3 is attached to the caliper 1.
  • the coupling shaft 6 is provided with a gear 7 in gear engagement with a planet gear 8, which is also in gear engagement with a transmission sleeve 9 to be described below.
  • the planet gear 8 is rotatably arranged on an intermediate gear 10, rotatably arranged in the caliper 1.
  • the intermediate gear 10 is in gear engagement with a thrust rod gear 11 of each of two thrust rods 12.
  • the thrust rods 12 have the general function of transforming the ingoing rotational movement of the gear 11 into an outgoing linear movement of a part connected to a first disc brake pad 13 at one side of the brake disc 2.
  • a second disc brake pad 14 connected to the caliper 1, which in this case is of the so called floating type, i e it is mounted for certain movements perpendicularly to the disc 2.
  • the caliper may, however, equally well be of the fixed type. With the briefly described design the first disc brake pad 13 will be applied against the brake disc 2, when the motor 3 is rotated in its application direction.
  • the transmission sleeve 9 is rotatable in the caliper 1 and is provided with a sleeve arm 9 " extending out of the caliper 1 trough a slot 1' having an end shoulder 1" , against which the sleeve arm 9 " is shown to be resting in Fig 2.
  • An elasticity spring 15 fixedly supported to the left in Fig 2 (in a way not shown) exerts a bias to the right on the sleeve arm 9'.
  • a locking rod 16 axially movably arranged in the caliper 1 is arranged for locking cooperation with a corresponding opening 9" in the transmission sleeve 9.
  • the locking rod 16 is brought into engagement with the opening 9" by an electromagnet 17 when energized and biased by a compression spring 18 in the return direction.
  • First service brake application Initially, for example after the installation of new brake pads 13 and 14, the locking rod 16 is out of engagement with the transmission sleeve 9 and the elasticity spring 15 is released, so that the transmission sleeve is rotatably biased to the right in Fig 2.
  • the disc brake is applied in a normal way by rotation of the electric motor 3 in its application direction.
  • the electromagnet 17 is energized, so that the locking rod 16 strives for getting into engagement with the transmission sleeve 9.
  • the brake force reaches a level corresponding to the bias of the elasticity spring 15
  • the spring is compressed, and the transmission sleeve 9 is rotated, until the sleeve arm 9' engages the slot shoulder 1" and the locking rod 16 engages the transmission sleeve 9.
  • the disc brake is applied and released by rotating the electric motor 3 in either direction (without any influence from the elasticity spring 15, as the transmission sleeve 9 is held stationary) . Parking brake application
  • the disc brake is applied by the electric motor 3 to a force which is somewhat higher than the bias of the elasticity spring 15, and the electromagnet 17 is de- energized.
  • the elasticity spring 15 is now in the force transmitting chain. If the parking brake force decreases under the force of the elasticity spring 15, only the elasticity spring will provide the braking force.
  • the movement of the locking rod 16 can be monitored by the electronics of the brake system, so that it can be verified that the correct force has been attained and that extra elasticity is available. Differently stated, the fact that the locking rod 16 is withdrawn or pulled out (under the bias of the compression spring 18) is a verification that the parking brake functions and that a brake force is available.
  • the electromagnet 17 When the parking brake is to be released the electromagnet 17 is energized. The brake is applied to a force which is somewhat higher than the bias of the elasticity spring 15, and the locking rod 16 engages the the transmission sleeve 9.
  • the rotational speed reduction from the coupling shaft 7 to the intermediate gear 10 is performed by a gear box 19, preferably a planetary gear box, in the transmission sleeve 9A.
  • the transmission sleeve 9A has a protrusion 9A' , extending into a caliper slot 1A ⁇ having an end shoulder 1A" , and an opening 9A" for the locking pin 16.
  • the outer end of the elasticity spring 15A is attached to the caliper 1 and the inner end to the transmission sleeve 9A.
  • the function of the brake according to the second embodiment is the same as that of the first embodiment, and the description thereof is not repeated.
  • the third embodiment according to Figs 5 and 6 has closest similarities with the first embodiment .
  • the principal difference in relation thereto is that the third embodiment has only one thrust rod instead of two.
  • the planet gear 8 is rotatably arranged on a thust rod ring 11B (journalled in the caliper 1) of the single thrust rod 12B .
  • the coupling shaft 6B with the gear 7 is sleeve-shaped in order to accomodate the thrust rod 12B .
  • the function of this embodiment is the same as that of the first embodiment.
  • An alternative function of the arrangement is to have the elasticity spring 15; 15A locked in unloaded state at service brake application of the brake. At a parking brake application the unlocked elasticity spring is loaded by the electric motor 3 and used for parking brake application. Modifications are possible within the scope of the appended claims . It would for example be possible to make use of the basic thought behind the invention not only for a disc brake but also for a drum or block brake, and the invention is not limited to brakes for heavy road vehicles .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

In a parking brake arrangement in an electrically operated brake, a rotary movement of an electric motor (3) is transformed into a translational brake applying movement. An engageable or disengageable elasticity spring (15; 15A) for providing a parking brake force when engaged is so arranged in the force transmitting chain that its elasticity is in series with the elasticity of the brake.

Description

A PARKING BRAKE ARRANGEMENT IN AN ELECTRICALLY OPERATED BRAKE
Technical Field
The present invention relates to a parking brake arrangement in an electrically operated brake, in which a rotary movement of an electric motor is transformed into a translational brake applying movement. Background of the Invention
There is a tendency to employ an electric drive motor as the means for operating a brake actuator for a vehicle. In the present case this electric motor is used for operating a disc brake, especially but not exclusively for a heavy road vehicle, such as a truck, trailer, or bus. This disc brake contains means for transforming the rotational movement of the electric motor into a translational movement of a brake pad.
The electric motor can be used not only for service braking but also for parking braking. In the latter case the brake is applied by the electric motor to a force which is suitable for safely holding the vehicle in the parked position and is held in this applied condition.
A problem may, however, be encountered in that the brake disc and certain portions of the disc brake may have been heated to considerable temperatures during the preceding service braking. When the heated members gradually cool off and return to normal size after their heat expansion, the parking brake force may decrease to such a level that the safe parking braking may be jeopardized.
The Invention
The problem of ensuring a satisfactory parking braking when the heated members cool off may according to the invention be solved by an elasticity spring, which is so arranged in the force transmitting chain that its elasticity is in series with the elasticity of the brake and is adapted to provide a rotary parking brake force.
The elasticity spring is preferably loaded at a service brake application of the brake and then locked until released for parking brake application.
A practical embodiment is characterized in that a transmission sleeve rotatably biased by the elasticity spring is rotatably arranged in the rotary force transmitting chain in the housing of the brake and is held to the housing at service braking but is disengaged therefrom at parking braking.
Hereby, the force of the elasticity spring is transmitted via the transmission sleeve to the brake pad only at parking braking. The elasticity spring may provide a force which is suitable for parking braking.
For practically accomplishing the engagement and disengagement of the transmission sleeve there is a locking rod, which is arranged in the housing for engagement with the transmission sleeve by means of an electromagnet and disengagement therefrom by means of a compression spring. The elasticity spring may either be a compression spring connected to the transmission sleeve by means of a sleeve arm or a clock spring or spiral spring arranged in the housing with its outer end attached to the housing and its inner end attached to the transmission sleeve.
Brief Description of the Drawings
The invention will de described in further detail below under reference to the accompanying drawings, in which
Fig 1 is a sectional side-view and Fig 2 is a section along the line II-II in Fig 1 of a first embodiment of an electric disc brake according to the invention, Fig 3 is a sectional side-view and Fig 4 is a section along the line IV-IV in Fig 3 of a second embodiment of an electric disc brake according to the invention, and
Fig 5 is a sectional side-view and Fig 6 is a section along the line VI-VI in Fig 5 of a third embodiment of an electric disc brake according to the invention. Detailed Description of Embodiments The first embodiment according to Figs 1 and 2 A disc brake according to the invention is very schematically shown in Fig 1. A disc brake caliper or housing 1 is to be mounted astraddle of a brake disc 2 on a vehicle axle. The vehicle is preferably but not exclusively a heavy road vehicle, such as a bus, a truck, or a trailer. An electric motor 3 is attached to the caliper 1. Its drive shaft 4, which may be rotated in either direction by the motor 3 , is connected to a coupling 5 of the kind that keeps its outgoing coupling shaft 6 non-rotatable or braked, in a brake release direction, when no current is supplied to the motor 3. The coupling shaft 6 is provided with a gear 7 in gear engagement with a planet gear 8, which is also in gear engagement with a transmission sleeve 9 to be described below. The planet gear 8 is rotatably arranged on an intermediate gear 10, rotatably arranged in the caliper 1. By this exemplary arrangement the rotational speed of the intermediate gear 10 is reduced in relation to that of the coupling shaft 6. Other reduction arrangements, for example in more than one stage, are possible.
The intermediate gear 10 is in gear engagement with a thrust rod gear 11 of each of two thrust rods 12. The thrust rods 12 have the general function of transforming the ingoing rotational movement of the gear 11 into an outgoing linear movement of a part connected to a first disc brake pad 13 at one side of the brake disc 2. At the other side of the brake disc 2 there is a second disc brake pad 14 connected to the caliper 1, which in this case is of the so called floating type, i e it is mounted for certain movements perpendicularly to the disc 2. The caliper may, however, equally well be of the fixed type. With the briefly described design the first disc brake pad 13 will be applied against the brake disc 2, when the motor 3 is rotated in its application direction. At a motor rotation in the opposite direction the disc brake pad 13 will be withdrawn from the brake disc 2. The transmission sleeve 9 is rotatable in the caliper 1 and is provided with a sleeve arm 9 " extending out of the caliper 1 trough a slot 1' having an end shoulder 1" , against which the sleeve arm 9 " is shown to be resting in Fig 2. An elasticity spring 15 fixedly supported to the left in Fig 2 (in a way not shown) exerts a bias to the right on the sleeve arm 9'.
A locking rod 16 axially movably arranged in the caliper 1 is arranged for locking cooperation with a corresponding opening 9" in the transmission sleeve 9. The locking rod 16 is brought into engagement with the opening 9" by an electromagnet 17 when energized and biased by a compression spring 18 in the return direction. First service brake application Initially, for example after the installation of new brake pads 13 and 14, the locking rod 16 is out of engagement with the transmission sleeve 9 and the elasticity spring 15 is released, so that the transmission sleeve is rotatably biased to the right in Fig 2. The disc brake is applied in a normal way by rotation of the electric motor 3 in its application direction. During this application the electromagnet 17 is energized, so that the locking rod 16 strives for getting into engagement with the transmission sleeve 9. When the brake force reaches a level corresponding to the bias of the elasticity spring 15, the spring is compressed, and the transmission sleeve 9 is rotated, until the sleeve arm 9' engages the slot shoulder 1" and the locking rod 16 engages the transmission sleeve 9.
At a subsequent release of the brake to a force below the bias of the elasticity spring 15, the locking rod 16 will be clamped in an engaged position in the transmission sleeve 9, which means that the engaged, shown position will remain even at a current loss for the brake system. Normal brake operation
In normal operation the different parts are in the positions shown in Figs 1 and 2 with the electromagnet 17 energized and the locking rod 16 in locking engagement with the transmission sleeve 9. Also, the elasticity spring 15 is in a compressed state.
The disc brake is applied and released by rotating the electric motor 3 in either direction (without any influence from the elasticity spring 15, as the transmission sleeve 9 is held stationary) . Parking brake application
The disc brake is applied by the electric motor 3 to a force which is somewhat higher than the bias of the elasticity spring 15, and the electromagnet 17 is de- energized.
In this situation the compression spring 18 is able to withdraw the locking rod 16 from engagement with the transmission sleeve 9.
The elasticity spring 15 is now in the force transmitting chain. If the parking brake force decreases under the force of the elasticity spring 15, only the elasticity spring will provide the braking force.
The movement of the locking rod 16 can be monitored by the electronics of the brake system, so that it can be verified that the correct force has been attained and that extra elasticity is available. Differently stated, the fact that the locking rod 16 is withdrawn or pulled out (under the bias of the compression spring 18) is a verification that the parking brake functions and that a brake force is available.
Parking brake release
When the parking brake is to be released the electromagnet 17 is energized. The brake is applied to a force which is somewhat higher than the bias of the elasticity spring 15, and the locking rod 16 engages the the transmission sleeve 9.
Tiie second embodiment according to Figs 3 and 4 The main difference between the second and the first embodiments is that the former has an elasticity spring in the form of a clock spring or spiral spring instead of a compression spring.
Parts that are similar in the two embodiments have the same reference numerals. This is true for the disc brake caliper 1, the brake disc 2, the electric motor 3, the drive shaft 4, the coupling 5, the coupling shaft 6, the intermediate gear 10, the trust rod gears 11, the thrust rods 12, the disc brake pads 13 and 14, the locking rod 16, the electromagnet 17, and the compression spring 18. A modified transmission sleeve is given the reference numeral 9A, and the modified elasticity spring is given the reference numeral 15A.
In this embodiment the rotational speed reduction from the coupling shaft 7 to the intermediate gear 10 is performed by a gear box 19, preferably a planetary gear box, in the transmission sleeve 9A.
The transmission sleeve 9A has a protrusion 9A' , extending into a caliper slot 1A^ having an end shoulder 1A" , and an opening 9A" for the locking pin 16. The outer end of the elasticity spring 15A is attached to the caliper 1 and the inner end to the transmission sleeve 9A.
The function of the brake according to the second embodiment is the same as that of the first embodiment, and the description thereof is not repeated.
The third embodiment according to Figs 5 and 6
The third embodiment according to Figs 5 and 6 has closest similarities with the first embodiment . The principal difference in relation thereto is that the third embodiment has only one thrust rod instead of two.
Again, parts that are similar in these two embodiments have the same numerals. This is true for the brake caliper 1, the brake disc 2, the electric motor 3, the drive shaft 4, the coupling 5, the gear 7, the planet gear 8, the disc brake pads 13 and 14, the elasticity spring 15, the locking pin 16, the electromagnet 17, and the compression spring 18.
The planet gear 8 is rotatably arranged on a thust rod ring 11B (journalled in the caliper 1) of the single thrust rod 12B . The coupling shaft 6B with the gear 7 is sleeve-shaped in order to accomodate the thrust rod 12B .
The function of this embodiment is the same as that of the first embodiment. An alternative function of the arrangement is to have the elasticity spring 15; 15A locked in unloaded state at service brake application of the brake. At a parking brake application the unlocked elasticity spring is loaded by the electric motor 3 and used for parking brake application. Modifications are possible within the scope of the appended claims . It would for example be possible to make use of the basic thought behind the invention not only for a disc brake but also for a drum or block brake, and the invention is not limited to brakes for heavy road vehicles .

Claims

1. A parking brake arrangement in an electrically operated brake, in which a rotary movement of an electric motor (3) is transformed into a translational brake applying movement , c h a r a c t e r i z e d by an elasticity spring (15; 15A) so arranged in the force transmitting chain that its elasticity is in series with the elasticity of the brake and adapted to provide a rotary parking brake force,
2. An arrangement according to claim 1, c h a r a ct e r i z e d in that the elasticity spring (15; 15A) is loaded at a service brake application of the brake and then locked until released for parking brake application.
3. An arrangement according to claim 1, c h a r a c- t e r i z e d in that the elasticity spring (15; 15A) at service brake application of the brake is locked in unloaded state and at parking brake application is loaded by the electric motor (3) and used for parking brake application.
4. An arrangement according to claim 1, c h a r a ct e r i z e d in that a transmission sleeve (9; 9A) rotatably biased by the elasticity spring (15; 15A) is rotatably arranged in the rotary force transmitting chain of the brake and is held to a non-rotatable part of the brake at service braking but is disengaged therefrom at parking braking .
5. An arrangement according to claim 4, c h a r a ct e r i z e d in that the transmission sleeve (9; 9A) is rotatably arranged in the housing (1) of the brake and is held to the housing at service braking.
6. An arrangement according to claim 4, c h a r a ct e r i z e d by an electrically activated locking device
(16) for the transmission sleeve (9; 9A) .
7. An arrangement according to claim 6, c h a r a c- t e r i z e d by a locking rod (16) , which is arranged in the housing (1) for engagement with the transmission sleeve (9; 9A) by means of an electromagnet (17) and disengagement therefrom by means of a compression spring (18) .
8. An arrangement according to any of claims 1-7, c h a r a c t e r i z e d in that the elasticity spring is a compression spring (15) connected to the transmission sleeve (9) by means of a sleeve arm (9') .
9. An arrangement according to any of claims 1-7, c h a r a c t e r i z e d in that the elasticity spring is a clock spring or spiral spring (15A) arranged in the housing (1) with its outer end attached to the housing and its inner end attached to the transmission sleeve (9A) .
10. An arrangement according to claim 4, c h a r a ct e r i z e d by means for monitoring the movement of the locking rod (16) so as to verify the function of the arrangement .
PCT/SE2002/002363 2001-12-18 2002-12-16 A parking brake arrangement in an electrically operated brake WO2003052286A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2003553143A JP2005513366A (en) 2001-12-18 2002-12-16 Electrically operated brake parking brake structure
AU2002359156A AU2002359156A1 (en) 2001-12-18 2002-12-16 A parking brake arrangement in an electrically operated brake
DE60209549T DE60209549T2 (en) 2001-12-18 2002-12-16 PARKING BRAKE ASSEMBLY IN AN ELECTRICALLY OPERATED BRAKE
EP02793669A EP1456554B1 (en) 2001-12-18 2002-12-16 A parking brake arrangement in an electrically operated brake
US10/869,144 US20050016799A1 (en) 2001-12-18 2004-06-16 Parking brake arrangement in an electronically operated brake

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0104279A SE0104279D0 (en) 2001-12-18 2001-12-18 A parking brake arrangement in an electrically operated brake
SE0104279-5 2001-12-18

Related Child Applications (1)

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Cited By (9)

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US6851533B2 (en) * 2000-12-20 2005-02-08 Haldex Brake Products Ab Spring brake actuator
WO2005031184A1 (en) * 2003-09-26 2005-04-07 Haldex Brake Products Ab A method and arrangement for parking braking at a disc brake
WO2006133917A1 (en) * 2005-06-16 2006-12-21 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Disk brake comprising electric motor-driven adjusting devices and method for braking using the parking brake
FR2913257A1 (en) * 2007-03-02 2008-09-05 Valeo Embrayages Clutch controlling device for motor vehicle, has lock for maintaining gear with respect to motor body when coupling unit is in active position, and permitting free rotation of gear with respect to body when unit is in uncoupled position
US20090200120A1 (en) * 2004-10-13 2009-08-13 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Self-energizing disk brake and control method for a self-energizing brake
WO2010121756A1 (en) * 2009-04-21 2010-10-28 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Multi-disk brake
WO2016155716A1 (en) * 2015-04-02 2016-10-06 Schaeffler Technologies AG & Co. KG Actuator arrangement for actuating a mechanical unit, preferably for actuating a clutch
FR3056271A1 (en) * 2016-09-21 2018-03-23 Jean Marc Loriot CURRENT BRAKE SYSTEM
RU2729340C2 (en) * 2016-03-21 2020-08-06 Фейвели Транспор Амьен Braking system for railway vehicle

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ITMI20041452A1 (en) * 2004-07-20 2004-10-20 Piaggio & C Spa SELECTIVE DRIVE DEVICE
US9732813B2 (en) * 2006-12-29 2017-08-15 Haldex Brake Products Ab Park lock and pad wear adjusting arrangement for electrically actuated brake
JP6190146B2 (en) * 2013-04-22 2017-08-30 Ntn株式会社 Electric linear actuator and electric brake device
DE102014001160A1 (en) * 2014-01-31 2015-08-06 Kiekert Aktiengesellschaft Electric motor vehicle door lock with increased reliability

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DE19908062A1 (en) * 1999-02-25 2000-08-31 Continental Teves Ag & Co Ohg Parking brake system has locking device for operating brake(s) automatically actuated when vehicle is stationary, rapid release device that releases locking device from its actuated position

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JP2001122090A (en) * 1999-10-22 2001-05-08 Nippon Cable Syst Inc Motor-driven parking brake
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US5004077A (en) * 1989-09-13 1991-04-02 Orscheln Co. Electromechanical parking brake system
US5829845A (en) * 1996-01-20 1998-11-03 Continental Aktiengesellschaft Brake system for a motor vehicle
DE19744356C1 (en) * 1997-10-08 1999-01-07 Continental Ag Brake actuator for electrical brake equipment with parking brake
DE19851668A1 (en) * 1998-11-10 2000-05-11 Bosch Gmbh Robert Wheel brake arrangement for motor vehicle has electric motor, spring storage device acting upon non-linear gear set containing cam drive in direction of brake application
DE19908062A1 (en) * 1999-02-25 2000-08-31 Continental Teves Ag & Co Ohg Parking brake system has locking device for operating brake(s) automatically actuated when vehicle is stationary, rapid release device that releases locking device from its actuated position

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6851533B2 (en) * 2000-12-20 2005-02-08 Haldex Brake Products Ab Spring brake actuator
WO2005031184A1 (en) * 2003-09-26 2005-04-07 Haldex Brake Products Ab A method and arrangement for parking braking at a disc brake
DE112004001812B4 (en) * 2003-09-26 2021-06-17 Haldex Brake Products Ab Method and arrangement for parking braking in a disc brake
US20090200120A1 (en) * 2004-10-13 2009-08-13 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Self-energizing disk brake and control method for a self-energizing brake
WO2006133917A1 (en) * 2005-06-16 2006-12-21 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Disk brake comprising electric motor-driven adjusting devices and method for braking using the parking brake
FR2913257A1 (en) * 2007-03-02 2008-09-05 Valeo Embrayages Clutch controlling device for motor vehicle, has lock for maintaining gear with respect to motor body when coupling unit is in active position, and permitting free rotation of gear with respect to body when unit is in uncoupled position
US8827049B2 (en) 2009-04-21 2014-09-09 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Multi-disc brake
WO2010121756A1 (en) * 2009-04-21 2010-10-28 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Multi-disk brake
WO2016155716A1 (en) * 2015-04-02 2016-10-06 Schaeffler Technologies AG & Co. KG Actuator arrangement for actuating a mechanical unit, preferably for actuating a clutch
RU2729340C2 (en) * 2016-03-21 2020-08-06 Фейвели Транспор Амьен Braking system for railway vehicle
FR3056271A1 (en) * 2016-09-21 2018-03-23 Jean Marc Loriot CURRENT BRAKE SYSTEM
WO2018055243A1 (en) * 2016-09-21 2018-03-29 Loriot Jean Marc Power-off braking system
US10989261B2 (en) 2016-09-21 2021-04-27 Jean-Marc Loriot Power-off braking system

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DE60209549T2 (en) 2007-02-01
SE0104279D0 (en) 2001-12-18
EP1456554A1 (en) 2004-09-15
EP1456554B1 (en) 2006-03-01
JP2005513366A (en) 2005-05-12
US20050016799A1 (en) 2005-01-27
DE60209549D1 (en) 2006-04-27
AU2002359156A1 (en) 2003-06-30
ATE319021T1 (en) 2006-03-15

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