WO2017138415A1 - Dispositif de frein électrique et procédé de fabrication de dispositif de frein électrique - Google Patents

Dispositif de frein électrique et procédé de fabrication de dispositif de frein électrique Download PDF

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Publication number
WO2017138415A1
WO2017138415A1 PCT/JP2017/003614 JP2017003614W WO2017138415A1 WO 2017138415 A1 WO2017138415 A1 WO 2017138415A1 JP 2017003614 W JP2017003614 W JP 2017003614W WO 2017138415 A1 WO2017138415 A1 WO 2017138415A1
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WIPO (PCT)
Prior art keywords
brake
electric
caliper
piston
brake disc
Prior art date
Application number
PCT/JP2017/003614
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English (en)
Japanese (ja)
Inventor
山崎　達也
雅章 江口
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Ntn株式会社
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Publication date
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2017138415A1 publication Critical patent/WO2017138415A1/fr

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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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • 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
    • F16D55/22—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 clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • 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
    • F16D55/22—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 clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—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 clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225—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 clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • 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
    • F16D65/02—Braking members; Mounting thereof
    • 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

Definitions

  • the present invention relates to an electric brake device using an electric motor as a drive source, and a method for manufacturing the electric brake device.
  • a hydraulic brake device using a hydraulic pressure as a drive source has been often adopted.
  • the hydraulic brake device uses a brake oil, and thus has a high environmental load.
  • an ABS a stability control system. It is difficult to further enhance the functions such as brake assist. Therefore, an electric brake device using an electric motor as a drive source has attracted attention as means for realizing further enhancement of the function of the brake device and reduction of environmental load.
  • the electric brake device described in Patent Document 1 includes a brake disc that rotates integrally with a wheel, an inner side and an outer side brake pad that face each other in the axial direction with the brake disc interposed therebetween, and a brake disc of the outer side brake pad.
  • a caliper body having a claw portion that supports a side surface opposite to the opposing side hereinafter referred to as “the back surface of the outer brake pad”
  • the back surface of the inner brake pad a side surface opposite to the brake disc side of the inner brake pad
  • This electric linear actuator has a piston disposed facing the back surface of the inner brake pad, an electric motor, and a linear mechanism that converts the rotation of the electric motor into a linear motion of the piston.
  • the piston is housed in a housing hole formed directly in the caliper body so as to be movable in parallel with the axial direction of the brake disk.
  • the rotational driving force of the electric motor is transmitted to the piston through the linear motion mechanism, and the piston moves linearly.
  • the piston presses the back surface of the inner brake pad, so that the inner brake pad is pressed against the brake disc.
  • the caliper body that is supported so as to be movable in the axial direction with respect to the brake disc is moved axially toward the inner side by the axial reaction force that the inner brake pad receives from the brake disc, and the rear side is moved by the claw portion of the caliper body.
  • the outer brake pad that is supported by is pressed against the brake disc. In this way, the inner and outer brake pads are pressed against the brake disc, and a braking force is generated on the brake disc by friction between the contact surfaces.
  • the electric brake device described in Patent Document 1 is for a small load assumed to be used for a rear wheel of a general size automobile or a front wheel of a small automobile.
  • the inventor of the present application uses an electric brake device as disclosed in Patent Document 1 for heavy loads (for example, a brake device for a front wheel of a general size automobile, a brake for a large automobile such as a bus or a truck). We considered adopting it as a device.
  • the inventor has noticed the following problems when the electric brake device described in Patent Document 1 is used for heavy loads. That is, in the electric brake device described in Patent Document 1, the number of electric linear motion actuators that press the back surface of the inner brake pad is one, and the piston of the piston that presses the back surface of the inner brake pad accordingly. The number is also one.
  • a caliper body having a claw portion for supporting a side surface opposite to the side facing the brake disc of one brake pad of the pair of brake pads opposed in the axial direction with the brake disc interposed therebetween;
  • the first and second electric linear motion actuators that press the side surface of the other brake pad opposite to the side facing the brake disc at two locations apart in the circumferential direction of the brake disc.
  • the electric brake device having the above configuration is configured to press the back surface of the brake pad at two locations separated in the circumferential direction, even when the pressing force acting on the brake pad is increased, the pressure between the brake pad and the brake disk is increased. It tends to be uniform over the entire surface of the brake pad. For this reason, even when a large braking force is generated, the fade phenomenon hardly occurs and the wear of the brake pad does not easily progress.
  • the inventor differs in the number of electric linear actuators between the heavy load electric brake device and the light load electric brake device. I realized the possibility of sharing the shape of the electric linear actuator with the electric brake device.
  • the problem to be solved by the present invention is to reduce the manufacturing cost of a heavy-duty electric brake device in which the fade phenomenon is unlikely to occur and the wear of the brake pad is unlikely to proceed.
  • the present invention provides an electric brake device having the following configuration.
  • a caliper body having a claw portion for supporting a side surface opposite to the side facing the brake disc of one brake pad of the pair of brake pads opposed in the axial direction with the brake disc interposed therebetween;
  • the first and second electric linear motion actuators that press the side surface of the other brake pad opposite to the side facing the brake disc at two locations apart in the circumferential direction of the brake disc.
  • the first and second electric linear actuators are electric brake devices that are detachably attached to the caliper body, respectively.
  • the first and second electric linear actuators can be respectively attached to and detached from the caliper body, at least one of the first and second electric linear actuators is manufactured as an electric brake device for a small load.
  • the manufacturing cost of the electric brake device can be reduced. That is, by attaching an electric linear actuator having the same shape as one of the first and second electric linear actuators to the caliper body for small loads, it is possible to manufacture an electric brake device for small loads. .
  • an electric linear actuator for the electric brake device for a large load and an electric linear actuator for the electric brake device for a small load are provided. The manufacturing cost of the electric brake device can be reduced.
  • the electric brake device is preferably added with the following configuration.
  • the first electric linear actuator includes a first piston disposed opposite to a side surface of the other brake pad opposite to the side facing the brake disc, and the first piston is disposed on the shaft of the brake disc.
  • a first piston housing that is movably accommodated parallel to the direction and is detachably fixed to the caliper body, a first electric motor, and the rotation of the first electric motor is converted into a linear motion of the first piston.
  • the second electric linear actuator is opposed to the side surface of the other brake pad opposite to the side facing the brake disc at a position away from the first piston in the circumferential direction of the brake disc.
  • a second linear motion mechanism that converts the linear motion of two pistons;
  • the first and second pistons have the same shape as each other,
  • the first and second piston housings have the same shape as each other,
  • the first and second electric motors have the same shape as each other,
  • the first and second linear motion mechanisms have the same shape.
  • the electric brake device can have the following configuration.
  • the first electric linear actuator includes two first caliper arms extending on both sides in the circumferential direction of the brake disc, and the caliper body is attached to one of the two first caliper arms.
  • a first slide pin that is movably supported parallel to the axial direction of the brake disc is fixed
  • the second electric linear actuator includes two second caliper arms extending on both sides in the circumferential direction of the brake disk, and the caliper body is attached to one of the two second caliper arms.
  • a second slide pin that is supported so as to be movable in parallel with the axial direction of the brake disc is fixed.
  • first caliper arm on the side of the two first caliper arms on which the first slide pin is not fixed is fixed to the caliper body, and the first caliper arm of the two second caliper arms is fixed.
  • the second caliper arm on the side where the two slide pins are not fixed can be fixed to the caliper body.
  • the two first caliper arms are axially displaced from each other;
  • the two second caliper arms are arranged so as to be offset from each other in the axial direction;
  • the first caliper arm on the side where the first slide pin is not fixed and the second slide pin of the two second caliper arms are not fixed
  • the second caliper arm on the side is fixed to the caliper body with a common bolt while being overlapped in the axial direction.
  • the caliper body has two caliper arms extending in parallel to the circumferential direction of the brake disc, and the two caliper arms support the caliper body so as to be movable in parallel with the axial direction of the brake disc. It is also possible to adopt a configuration in which the pins are fixed.
  • the present invention also provides a method for manufacturing an electric brake device for manufacturing a heavy load and a light load electric brake device having the following configuration.
  • a caliper body for heavy loads having a claw portion for supporting a side surface opposite to the side facing the brake disc of one of the pair of brake pads facing in the axial direction with the brake disc interposed therebetween; ,
  • the first and second electric linear motion actuators that press the side surface of the other brake pad opposite to the side facing the brake disc at two locations apart in the circumferential direction of the brake disc.
  • a large load electric brake device is manufactured by detachably attaching the first and second electric linear actuators to the caliper body for large load, A caliper body for small loads smaller than the caliper body; An electric linear actuator having the same shape as at least one of the first and second electric linear actuators; Producing an electric brake device for small load by detachably attaching the electric linear actuator of the same shape to the caliper body for small load; Manufacturing method of electric brake device.
  • the electric brake device according to the present invention is configured to press the back surface of the brake pad at two locations separated in the circumferential direction, even when the pressing force acting on the brake pad is increased, the electric brake device is not provided between the brake pad and the brake disk.
  • the pressure tends to be uniform over the entire surface of the brake pad. Therefore, when a heavy load is generated, the fade phenomenon is unlikely to occur, and wear of the brake pad is unlikely to proceed.
  • the first and second electric linear actuators can be respectively attached to and detached from the caliper body, at least one of the first and second electric linear actuators is manufactured as an electric brake device for a small load. It is possible to reduce the manufacturing cost of the electric brake device by sharing the electric linear actuator used for the electric brake.
  • FIG. 2 is an enlarged sectional view in the vicinity of the first linear motion mechanism in FIG. Sectional view along line VI-VI in FIG.
  • FIG. 7 is a view of the electric brake device for small load shown in FIG.
  • FIG. 11 is a diagram of the electric brake device shown in FIG.
  • the electric brake device 1 includes a brake disk 2 that rotates integrally with a wheel (not shown), and inner and outer brake pads that face each other in the axial direction with the brake disk 2 interposed therebetween.
  • And caliper body 6 having a claw portion 5 that supports a side surface of the outer brake pad 4 opposite to the side facing the brake disc 2 (hereinafter referred to as “the rear surface of the outer brake pad 4”);
  • the first and second sides of the inner side brake pad 3 that press the side surface opposite to the side facing the brake disc 2 (hereinafter referred to as “the back side of the inner side brake pad 3”) at two locations apart in the circumferential direction of the brake disc 2
  • Second electric linear actuators 7a and 7b see FIG. 1).
  • the inner side and the outer side in the vehicle body width direction when the electric brake device 1 is assembled to the vehicle body are referred to as an inner side and an outer side, respectively.
  • a pair of ear pieces 8 are formed at both ends of the inner brake pad 3.
  • the ear piece 8 is slidably supported by a pair of guide grooves 10 formed in the mounting bracket 9.
  • the mounting bracket 9 is fixed to the vehicle body so as not to move in the axial direction with respect to the brake disc 2.
  • the guide groove 10 is a groove extending in parallel with the axial direction of the brake disk 2. Due to the engagement of the guide groove 10 and the ear piece 8, the inner brake pad 3 is supported so as to be movable between a position contacting the inner side surface of the brake disk 2 and a position separating from the inner side brake pad 3.
  • a pair of ear pieces 11 are formed at both ends of the outer brake pad 4.
  • the ear piece 11 is slidably supported by a pair of guide grooves 12 formed in the mounting bracket 9.
  • the guide groove 12 is a groove extending in parallel with the axial direction of the brake disk 2. Due to the engagement of the guide groove 12 and the ear piece 11, the outer brake pad 4 is supported so as to be movable between a position contacting the outer side surface of the brake disk 2 and a position separating the outer brake pad 4.
  • the inner brake pad 3 and the outer brake pad 4 include a friction material 13 that contacts the brake disk 2 and a back metal 14 that is bonded to the back surface of the friction material 13.
  • Ear pieces 8 and 11 (see FIGS. 1 and 3) of the inner brake pad 3 and the outer brake pad 4 are formed integrally with the back metal 14.
  • the caliper body 6 has a claw portion 5 facing the back surface of the outer brake pad 4 in the axial direction and an outer shell portion 15 facing the outer diameter side of the brake disc 2.
  • a screw hole 16 for fixing the first and second electric linear motion actuators 7a and 7b (see FIG. 1) is formed on the inner end face of the outer shell portion 15.
  • the first electric linear actuator 7 a has two first caliper arms 17 extending on both sides of the brake disk 2 in the circumferential direction.
  • the first slide pin 18 is fixed to one first caliper arm 17 of the two, and the other first caliper arm 17 is fixed to the caliper body 6 with a bolt 19.
  • the first slide pin 18 is a rod-like member extending in parallel with the axial direction of the brake disc 2 and is slidably inserted into a first pin hole 20 provided in the mounting bracket 9.
  • the first electric linear actuator 7 a is also fixed to the caliper body 6 with two bolts 21.
  • the first electric linear actuator 7 a can be attached to and detached from the caliper body 6 by attaching and detaching the bolts 19 and 21.
  • the second electric linear motion actuator 7b also has two second caliper arms 22 extending on both sides of the brake disk 2 in the circumferential direction.
  • a second slide pin 23 is fixed to one second caliper arm 22 of the two, and the other second caliper arm 22 is fixed to the caliper body 6 with a bolt 19.
  • the second slide pin 23 is a rod-like member extending in parallel with the axial direction of the brake disc 2 and is slidably inserted into a second pin hole 24 provided in the mounting bracket 9.
  • the second electric linear actuator 7 b is also fixed to the caliper body 6 with two bolts 25.
  • the second electric linear actuator 7b can be attached to and detached from the caliper body 6 by attaching and detaching the bolts 19 and 25.
  • the caliper body 6 and the first and second electric linear motion actuators 7a and 7b fixed to the caliper body 6 are the first and second slide pins 18 and 23, and the axial direction of the brake disk 2 is It is supported so that it can move in parallel.
  • the two first caliper arms 17 of the first electric linear actuator 7 a are arranged so as to be shifted from each other in the axial direction of the brake disk 2.
  • the two second caliper arms 22 of the second electric linear actuator 7b are also displaced from each other in the axial direction.
  • the arm 17 and the second caliper arm 22 on the side where the second slide pin 23 is not fixed overlap in the axial direction, and the first and second caliper arms 17 and 22 are fixed to the caliper body 6 by a common bolt 19. Has been.
  • the first electric linear actuator 7 a includes a first piston 26 a disposed so as to face the back surface of the inner brake pad 3, and the first piston 26 a is disposed in the axial direction of the brake disk 2.
  • a first piston housing 27a movably accommodated in parallel; a first electric motor 28a; a first linear motion mechanism 29a that converts the rotation of the first electric motor 28a into a linear motion of the first piston 26a;
  • a first reduction gear train 30a that reduces and transmits the rotation of the electric motor 28a to the first linear motion mechanism 29a.
  • the second electric linear actuator 7b is provided with a second piston 26b (opposed to the rear surface of the inner brake pad 3 at a position away from the first piston 26a in the circumferential direction of the brake disc 2). 4), a second piston housing 27b (see FIG. 4) for accommodating the second piston 26b so as to be movable in parallel with the axial direction of the inner brake disc 2, and a second electric motor 28b (see FIG. 1). And a second linear motion mechanism 29b (see FIG. 4) that converts the rotation of the second electric motor 28b into a linear motion of the second piston 26b, and the rotation of the second electric motor 28b is decelerated to the second linear motion mechanism 29b. And a second reduction gear train 30b (see FIG. 1) for transmission.
  • each component of the first electric linear actuator 7a and each component of the second electric linear actuator 7b have the same shape (in the figure, the first and second electric linear actuators).
  • Actuators 7a and 7b are the same). That is, the first and second pistons 26a and 26b have the same shape, the first and second piston housings 27a and 27b have the same shape, and the first and second electric motors 28a and 28b have the same shape.
  • the first and second linear motion mechanisms 29a and 29b have the same shape, and the first and second reduction gear trains 30a and 30b have the same shape. Therefore, hereinafter, regarding the second electric linear actuator 7b, portions corresponding to those of the first electric linear actuator 7a are denoted by the same reference numerals and description thereof is omitted.
  • the first piston housing 27a is configured such that the claw portion 5 of the caliper body 6 and the first piston housing 27a face each other in the axial direction with the inner side and outer side brake pads 3 and 4 therebetween. Is arranged.
  • the first piston housing 27 a is formed with a piston accommodation hole 31 that accommodates the first piston 26 a so as to be slidable in parallel with the axial direction of the brake disk 2.
  • the first electric motor 28a is disposed radially inward of the brake disk 2 with respect to the first piston 26a.
  • the first linear motion mechanism 29 a has a rotation shaft 32 disposed on the center line of the piston accommodation hole 31.
  • the first electric motor 28a is disposed so that the motor shaft 33 of the first electric motor 28a and the rotation shaft 32 of the first linear motion mechanism 29a are parallel to each other.
  • the first reduction gear train 30a includes an input gear 34 to which the rotation of the first electric motor 28a is input, an output gear 35 that outputs the rotation to the first linear motion mechanism 29a, and the input gear 34 and the output gear 35. And a plurality of intermediate gears 36 for transmitting the rotation.
  • the first linear motion mechanism 29a converts the rotation input to the rotary shaft 32 from the first electric motor 28a via the first reduction gear train 30a into the axial movement of the first piston 26a.
  • the first reduction gear train 30a is accommodated in a gear case 37 attached to the first piston housing 27a.
  • the gear case 37 includes a side plate 38 and a lid 39.
  • the side plate 38 is attached in parallel to the brake disc 2 at the end of the first piston housing 27a opposite to the brake disc 2 side.
  • the first electric motor 28 a is attached to the side plate 38.
  • the first piston housing 27a is formed with a bolt insertion hole 40 penetrating in parallel with the axial direction of the brake disc 2.
  • the first piston housing 27 a is fixed to the caliper body 6 by tightening the bolt 21 inserted into the bolt insertion hole 40.
  • the first caliper arm 17 (see FIG. 1) is formed integrally with the first piston housing 27a.
  • the first linear motion mechanism 29 a includes a plurality of planetary rollers 41 that are provided between the inner periphery of the first piston 26 a and the outer periphery of the rotary shaft 32 at intervals in the circumferential direction. And a carrier 42 for holding the planetary rollers 41 so as to be capable of rotating and revolving.
  • the first piston 26a is formed in a cylindrical shape that faces the outer periphery of the rotary shaft 32 in the radial direction.
  • Each planetary roller 41 is in rolling contact with the outer periphery of the rotating shaft 32.
  • the contact portion of the rotating shaft 32 with respect to the planetary roller 41 is a cylindrical surface.
  • each planetary roller 41 revolves around the rotating shaft 32 along the inner periphery of the first piston 26a while rotating around the roller shaft 43.
  • a spiral ridge 44 is provided on the inner periphery of the first piston 26a.
  • the spiral ridge 44 is a ridge that extends obliquely with a predetermined lead angle with respect to the circumferential direction.
  • On the outer periphery of each planetary roller 41 a plurality of circumferential grooves 45 that engage with the spiral ridges 44 are formed at intervals in the axial direction. The interval between the circumferential grooves 45 adjacent to each other in the axial direction on the outer periphery of each planetary roller 41 is the same as the pitch of the spiral ridges 44.
  • the circumferential groove 45 having a lead angle of 0 degree is provided on the outer periphery of the planetary roller 41, but a spiral groove having a lead angle different from that of the spiral protrusion 44 may be provided instead of the circumferential groove 45. .
  • the carrier 42 is provided at the center of each planetary roller 41, and is provided at the center of each planetary roller 41 and a pair of discs 46, 47 facing each other in the axial direction with the planetary roller 41 therebetween, a connecting portion 48 for connecting the discs 46, 47 together.
  • a roller shaft 43 to be supported. Both ends of each roller shaft 43 are supported by disks 46 and 47, respectively.
  • Each of the disks 46 and 47 is formed in an annular shape that penetrates the rotating shaft 32, and a sliding bearing 49 that is in sliding contact with the outer periphery of the rotating shaft 32 is mounted on the inner periphery thereof.
  • a thrust bearing 50 is incorporated that supports the planetary roller 41 in the axial direction in a rotatable state. Further, between the thrust bearing 50 and the disk 47, an aligning seat 51 that supports the planetary roller 41 so as to be tiltable via the thrust bearing 50 is incorporated.
  • the rotary shaft 32 penetrates at a position away from the brake disc 2 (see FIG. 2) when viewed from the first piston 26a.
  • a reaction force receiving member 52 formed in an annular shape is provided on the inner periphery of the reaction force receiving member 52.
  • a plurality of rolling bearings 53 that support the rotary shaft 32 in a rotatable manner are incorporated.
  • a thrust bearing 54 that supports the carrier 42 in the axial direction in a revolving state is incorporated.
  • a spacer 55 that revolves integrally with the carrier 42 is incorporated between the carrier 42 and the thrust bearing 54.
  • a boot 56 is attached to the opening edge of the piston receiving hole 31 on the brake disc 2 side.
  • the boot 56 is a cylindrical member that can be expanded and contracted in the axial direction, folded in a bellows shape.
  • One end of the boot 56 is connected to the inner periphery of the piston accommodation hole 31, and the other end of the boot 56 is connected to the outer periphery of the first piston 26a.
  • the boot 56 prevents foreign matter from entering between the sliding surfaces of the piston accommodation hole 31 and the first piston 26a.
  • an engagement recess 58 that engages with an engagement projection 57 formed on the back surface of the inner brake pad 3 is formed. The engagement of the engagement recess 58 prevents the first piston 26a from rotating.
  • the first linear motion mechanism 29 a transmits the rotation to the planetary roller 41 that is in rolling contact with the outer periphery of the rotation shaft 32, and each planetary roller 41 rotates around the roller shaft 43. Revolves around the rotating shaft 32. At this time, the planetary roller 41 and the first piston 26a are relatively moved in the axial direction by the engagement between the circumferential groove 45 on the outer periphery of the planetary roller 41 and the spiral protrusion 44 on the inner periphery of the first piston 26a.
  • the roller 41 Since the roller 41 is restricted from moving in the axial direction together with the carrier 42, the planetary roller 41 does not move in the axial direction with respect to the first piston housing 27a, and the first piston 26a does not move in the axial direction with respect to the first piston housing 27a. Move in the direction.
  • the 1st linear motion mechanism 29a converts rotation of the rotating shaft 32 into the linear motion of the 1st piston 26a.
  • the second linear motion mechanism 29b also converts the rotation transmitted from the second electric motor 28b (see FIG. 1) to the rotating shaft 32 into the linear motion of the second piston 26b (see FIG. 4).
  • the caliper body 6 slides with respect to the mounting bracket 9 due to the axial reaction force received by the first and second pistons 26a, 26b from the brake disc 2, and the claw portion 5 of the caliper body 6 moves to the outer brake.
  • the back surface of the pad 4 is pressed, and the outer brake pad 4 is pressed against the outer side surface of the brake disc 2.
  • the inner brake pad 3 and the outer brake pad 4 are pressed against the brake disc 2, and braking force is generated on the brake disc 2 due to friction between the contact surfaces of the brake pads 3, 4 and the brake disc 2.
  • the electric brake device 1 is configured to press the back surface of the inner brake pad 3 at two locations separated in the circumferential direction, the inner brake is applied even when the pressing force acting on the inner brake pad 3 is increased.
  • the pressure between the pad 3 and the brake disc 2 tends to be uniform over the entire surface of the inner brake pad 3. Therefore, even when a large braking force (a large load) is generated, a fade phenomenon (the friction material 13 of the inner brake pad 3 becomes hot and generates gas, and the gas causes the inner brake pad 3 and the brake disc 2 to be generated. It is possible to effectively prevent the frictional force between the inner brake pad 3 and the inner brake pad 3 from being worn locally.
  • the first and second electric linear actuators 7a and 7b are detachably attached to the caliper body 6, respectively. Therefore, the first and second electric linear actuators 7a and 7b are provided.
  • the manufacturing cost of the electric brake device 1 can be reduced by sharing at least one of them with the electric linear actuator 7a used for manufacturing the electric brake device 60 for small load as shown in FIGS. It is possible.
  • an electric linear actuator 7a (see FIG. 10) having the same shape as the first electric linear actuator 7a shown in FIGS. 1 to 4, and the electric linear actuator A small load caliper body 61 that can be attached to only one 7a is used, and the electric linear actuator 7a is attached to the caliper body 61 for small load to manufacture an electric brake device 60 for small load. can do.
  • the electric brake device 60 for small loads shown in FIGS. 7 to 9 differs from the electric brake device 1 for heavy loads shown in FIGS. 1 to 4 only in the number of electric linear actuators. Other basic configurations are the same.
  • slide pins 63 are fixed to the two first caliper arms 17 extending from the first piston housing 27a to both sides in the circumferential direction of the brake disc 62 (see FIG. 8).
  • Each slide pin 63 is slidably inserted into a pin hole 65 formed in the mounting bracket 64 for small load, and the slide pin 63 slides to cause the caliper body 61 for small load and the first electric linear motion.
  • the actuator 7a is movable in parallel with the axial direction of the brake disc 62 for light load with respect to the mounting bracket 64 for light load.
  • each component of the first electric linear actuator 7a and each component of the second electric linear actuator 7b have the same shape, so that the manufacturing cost of the electric brake device 1 can be further increased. It can be effectively reduced.
  • the first caliper arm 17 on the side where the first slide pin 18 is not fixed and the second caliper arm 22 on the side where the second slide pin 23 is not fixed are in the axial direction. Since the arms 17 and 22 overlap each other, the size of the electric brake device 1 can be reduced.
  • the first and second electric linear motion actuators 7a and 7b are provided with the first and second caliper arms 17 and 22 for fixing the first and second slide pins 18 and 23, respectively.
  • a caliper arm 66 for fixing the first and second slide pins 18 and 23 can be provided on the caliper body 6 side.
  • the electric brake device 1 shown in FIG. 11 and FIG. 12 is different from the electric brake device 1 of the above embodiment only in the caliper arm 66, and the other portions are the same.
  • the parts corresponding to are denoted by the same reference numerals and description thereof is omitted.
  • the caliper body 6 for heavy loads to which both the first and second electric linear motion actuators 7a and 7b can be attached has a circumferential direction of the brake disc 2 (see FIG. 2).
  • Two caliper arms 66 extending in parallel are provided.
  • the caliper body 61 for a small load to which only one electric linear actuator 7a having the same shape as the first electric linear actuator 7a can be attached is also provided on the brake disc 62 (FIG. 8). 2) and two caliper arms 67 extending in parallel with the circumferential direction.
  • the first and second linear motion mechanisms 29a and 29b that convert the rotations transmitted from the first and second electric motors 28a and 28b into linear motions of the first and second pistons 26a and 26b, respectively.
  • the planetary roller mechanism using the planetary roller 41 is employed
  • other types of linear motion mechanisms feed screw mechanism, ball ramp mechanism, etc.
  • the first and second electric motors 28a and 28b are disposed radially inward of the brake disc 2 with respect to the first and second pistons 26a and 26b, respectively. You may arrange

Landscapes

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

Abstract

L'invention concerne un dispositif de frein électrique comprenant : un corps d'étrier (6) qui comprend une partie griffe (5) permettant de supporter la surface latérale d'un patin (4) de frein côté extérieur sur le côté opposé à celui faisant face à un disque (2) de frein ; et un premier et un second actionneur linéaire électrique (7a, 7b) permettant d'appuyer, en deux endroits espacés dans la direction circonférentielle du disque (2) de frein, sur la surface latérale d'un patin (3) de frein côté intérieur sur le côté opposé à celui faisant face au disque (2) de frein. Chacun des premier et second actionneurs linéaires électriques (7a, 7b) est fixé amovible au corps d'étrier (6).
PCT/JP2017/003614 2016-02-09 2017-02-01 Dispositif de frein électrique et procédé de fabrication de dispositif de frein électrique WO2017138415A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-022794 2016-02-09
JP2016022794A JP6719916B2 (ja) 2016-02-09 2016-02-09 電動ブレーキ装置および電動ブレーキ装置の製造方法

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WO2017138415A1 true WO2017138415A1 (fr) 2017-08-17

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220396251A1 (en) * 2019-06-26 2022-12-15 Hitachi Astemo, Ltd. Electric brake device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10181578A (ja) * 1996-12-26 1998-07-07 Akebono Brake Ind Co Ltd 電動ブレーキ
JP2008222069A (ja) * 2007-03-13 2008-09-25 Kayaba Ind Co Ltd 電動ブレーキ
JP2010025222A (ja) * 2008-07-18 2010-02-04 Nissin Kogyo Co Ltd 電動式ディスクブレーキ装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007239869A (ja) * 2006-03-08 2007-09-20 Toyota Motor Corp 車両用ディスクブレーキ装置
JP5384974B2 (ja) * 2009-03-05 2014-01-08 カヤバ工業株式会社 電動ブレーキ
JP2015124811A (ja) * 2013-12-26 2015-07-06 曙ブレーキ工業株式会社 ディスクブレーキ装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10181578A (ja) * 1996-12-26 1998-07-07 Akebono Brake Ind Co Ltd 電動ブレーキ
JP2008222069A (ja) * 2007-03-13 2008-09-25 Kayaba Ind Co Ltd 電動ブレーキ
JP2010025222A (ja) * 2008-07-18 2010-02-04 Nissin Kogyo Co Ltd 電動式ディスクブレーキ装置

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