WO2017081827A1 - 電動パーキングブレーキ装置 - Google Patents
電動パーキングブレーキ装置 Download PDFInfo
- Publication number
- WO2017081827A1 WO2017081827A1 PCT/JP2015/082047 JP2015082047W WO2017081827A1 WO 2017081827 A1 WO2017081827 A1 WO 2017081827A1 JP 2015082047 W JP2015082047 W JP 2015082047W WO 2017081827 A1 WO2017081827 A1 WO 2017081827A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- winding
- sheet coil
- parking brake
- resolver
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- 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
-
- 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
- B60T13/741—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 acting on an ultimate actuator
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- 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
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- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/225—Detecting coils
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/40—Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load
-
- 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
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/84—Driver circuits for actuating motor, valve and the like
-
- 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
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D2066/005—Force, torque, stress or strain
-
- 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
- F16D2125/52—Rotating members in mutual engagement with non-parallel stationary axes, e.g. worm or bevel 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
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/039—Gearboxes for accommodating worm gears
Definitions
- the present invention relates to an electric parking brake device.
- Patent Document 1 Since the conventional electric parking brake device (see, for example, Patent Document 1 or 2) operates the motor with open loop control, the tightening position and the tightening speed between the brake pad and the brake disk cannot be managed. In addition, when the battery is once discharged and then recovered, the motor position information may be lost, and it may not be possible to determine whether the electric parking brake is in an on state or an off state.
- the electric parking brake device is provided with a rotation angle detection means such as a rotary encoder or a resolver to detect the number of rotations of the motor and control the tightening amount and tightening speed of the brake pad.
- the rotary encoder cannot withstand the harsh environment near the wheel of an automobile, and the conventional resolver (see, for example, Patent Document 3 or 4) is large.
- the coil portion is thick, When mounted on an electric parking brake device, the entire device becomes large, so it is not suitable for practical use, and the electric parking brake device is actually not subjected to fine control other than on / off control.
- An object of the present invention is to provide an electric parking brake device capable of managing a tightening position with a disk and a tightening speed.
- a brake disc in which the rotational movement of the rotary shaft of the electric motor provided in the housing is decelerated, converted into linear motion and transmitted to the pressing member, and the brake pad urged by the pressing member rotates with the wheel
- the rotating shaft of the motor or a shaft that rotates in synchronization with the rotating shaft A rotating plate fixed to the rotating plate, a base provided in the housing so as to face the rotating plate, and provided on a facing surface of the rotating plate facing the base, and provided with a detection winding.
- a first sheet coil that is disposed on an opposite surface of the rotating plate facing the base and connected to the detection winding.
- a second sheet coil provided with a primary winding of the transformer, and a third sheet coil provided on an opposing surface of the base facing the rotating plate and provided with an exciting winding facing the detection winding
- a fourth sheet coil provided on the opposing surface of the base facing the rotating plate and provided with the secondary winding of the output transformer facing the primary winding of the output transformer.
- a resolver control circuit having an input circuit for inputting an excitation signal to an excitation winding in the resolver and an output circuit for processing an output signal generated from a secondary winding of the output transformer;
- a motor control circuit that controls the electric motor based on the output of the output circuit in the resolver control circuit is provided.
- the entire resolver can be reduced in thickness by using the coil portion as a seat coil, thereby substantially allowing the resolver to be incorporated into the electric parking brake, so that the brake pad and brake disc can be incorporated.
- the tightening position and the tightening speed can be managed.
- the number of windings in the first to fourth sheet coils is one in one plane.
- the first sheet coil and the second sheet coil, and the third sheet coil and the fourth sheet coil opposed to the first sheet coil and the second sheet coil are synchronized with the rotating shaft of the motor or the same. They are arranged concentrically around a rotating shaft.
- the entire resolver can be further reduced in thickness.
- the excitation winding includes a first excitation winding and a second excitation winding, and the first excitation winding is a third sheet.
- the second excitation winding is attached to the front surface of the coil, and the back surface of the third sheet coil is attached to the back surface of the third sheet coil so that the phases are different from each other.
- the excitation winding is composed of the first excitation winding and the second excitation winding whose phases are different from each other in electrical angle, and these are formed on the front and back surfaces of the third sheet coil. Since it is attached to each, it can further contribute to the thinning of the resolver.
- the speed reducing means for reducing the rotational movement of the rotating shaft of the electric motor meshes with the worm provided on the rotating shaft and the worm, and the rotation A worm wheel linked to power conversion means for converting the rotational motion of the shaft into a straight motion, and a housing provided with a load sensor for detecting a thrust load acting in the axial direction of the rotational shaft;
- the control device is provided with a torque control circuit that obtains the tightening force of the brake disc by the brake pad based on the torque detection signal given from the load sensor.
- the output from the torque control circuit and the resolver control circuit Based on the output from the output circuit, the motor control circuit controls the electric motor.
- an electric parking brake device can be provided.
- FIG. 1 is a schematic longitudinal sectional front view schematically showing a first embodiment of an electric parking brake device of the present invention.
- FIG. 2 is a schematic longitudinal side view taken along line II-II in FIG. 1. It is a typical exploded perspective view of the end of a motor and a resolver in a 1st embodiment. It is a block diagram of the control device in the first embodiment. It is a flowchart which shows an example of the action
- FIG. 1 to 5 show a first embodiment of an electric parking brake device of the present invention.
- the electric parking brake device 1 is actuated by operating a parking brake lever, a parking brake pedal, or a parking brake switch (all not shown) provided in the driver's seat of the vehicle (in FIG. 4).
- a brake disc 2 that rotates with a vehicle wheel (not shown), a parking brake body 3 that is attached to a vehicle body (not shown) across the periphery of the brake disc 2, and It comprises an electric actuator 4 attached to the side surface of the parking brake body 3 and a control device 5 (see FIG. 4).
- FIG. 1 and 2 schematically show the electric parking brake device 1 by omitting fine parts so that the operation principle can be understood.
- the parking brake main body 3 is shown in FIG. A gate-shaped housing 6 that is mounted on the vehicle body (not shown) so as to straddle the periphery of the brake disc 2 and to be slightly movable in the axial direction of the rotating shaft (not shown) of the brake disc 2; 1, the first brake pad 7 fixed to the inner surface of the recess 6 a facing the left side of the brake disc 2 in FIG. 1, and the right side of the brake disc 2 on the inner surface of the housing 6 facing the right side of FIG. 1.
- Cylinder 8 provided in a portion that faces in a direction perpendicular to the right side surface of the brake disc 2, and inside and outside the cylinder 8
- a piston 10 that is slidable and non-rotatable and has a female screw hole 9 in the center in the center, an inner end projects inward of the housing 6 from the cylinder 8, and the brake disc 2 is shown in FIG.
- a second brake pad 11 provided at the inner end of the piston 10 facing the right side surface.
- a male screw portion 13 provided at the tip of the output shaft 12 of the electric actuator 4 is screwed into the female screw hole 9 of the piston 10, and when the output shaft 12 rotates in one direction, the female screw hole 9 of the piston 10 is rotated. And the male threaded portion 13 of the output shaft 12 are caused to advance the piston 10 toward the left side in FIG. 1, and the second brake pad 11 is pressed against the right side surface in FIG. Due to the reaction between the piston 10 and the housing 6 at that time, the housing 6 is moved to the right in FIG. 1 and the first brake pad 7 is pressed against the left side surface of the brake disc 2 in FIG. Is braked by the first brake pad 7 and the second brake pad 11 so that a braking force is applied to the wheel.
- the piston 10 when the output shaft 12 rotates in the other direction, the piston 10 is retracted toward the right in FIG. 1 by the screwing of the female screw hole 9 of the piston 10 and the male screw portion 13 of the output shaft 12, and the second The brake pad 11 moves away from the other side surface of the brake disk 2, and the housing 6 is moved to the left in FIG. 1 due to the reaction between the piston 10 and the housing 6 at that time.
- the brake disc 2 is separated from the first brake pad 7 and the second brake pad 11, and the braking force on the wheel is released.
- the piston 10 constitutes a pressing member that presses the second brake pad 11 against the other side of the brake disk 2, and the internal thread hole 9 of the piston 10 and the external thread portion 13 of the output shaft 12
- power conversion means 14 for converting the rotational motion of the output shaft 12 of the electric actuator 4 into a straight motion and transmitting it to the pressing member is formed.
- the electric actuator 4 includes a housing 15 fixed to the housing 6 of the parking brake main body 3, a part of the housing 15, a lid plate 16 that can detachably close the opening 15 a of the housing 15,
- the output shaft 12 that is pivotally supported by the cover plate 16 and partly penetrates the housing 6 and protrudes into the cylinder 8 of the housing 6 in the parking brake body 3, and the rotary shaft 17 is the output shaft 12. 2 and a motor housing 19 of the electric motor 18 in a rotating shaft 17 of the electric motor 18 mounted on the housing 15 so as to be orthogonal to the output shaft 12 and spaced from the output shaft 12.
- the output shaft 12 in the housing 15 and the worm 20 integrally provided on the left-projecting part of the housing 15. It is Katahama, and and a worm wheel 21 to the worm 20 meshes.
- a concave groove 22 is provided in the center of the tip surface on the left side of the rotary shaft 17 in FIG. 2, and the tip of the rotary shaft 17 is connected to the load sensor 24 via a sphere 23 fitted in the concave groove 22. It is in pressure contact.
- the load sensor 24 is disposed in an end cap 26 screwed to the housing 15 so as to hold a radial bearing 25 that pivotally supports the left end portion of the rotary shaft 17.
- the right end of the adjustment screw 28 screwed into the female screw hole 27 provided at the center of the end cap 26 is in pressure contact with the left end that is the tip of the load sensor 24, and the load sensor 24 acts on the right end of the adjustment screw 28.
- the thrust load to be detected can be detected.
- a small-diameter shaft 17a that protrudes to the right in FIG. 2 passes through the end wall 19a of the motor housing 19 of the electric motor 18 at the right end of the rotating shaft 17, and is provided at the center of the end wall 19a.
- a radial-thrust bearing 29 is provided inside a boss portion 19b which is a through portion of the small diameter shaft 17a. Note that the internal structure of the electric motor 18 is not directly related to the present invention, and thus illustration and detailed description thereof are omitted.
- an elastic cushioning material 29a is externally fitted to the small diameter shaft 17a.
- the rotary shaft 17 can move in the axial direction, and the rotary shaft 17 moves to the left in FIG.
- the buffer material 29a can be an elastic body such as rubber or a disc spring that can be deformed with a weak force. Further, the buffer material 29 a may be omitted, and a minute gap that cannot be visually observed may be provided between the right end of the rotating shaft 17 and the end wall 19 a of the motor housing 19 or the radial-thrust bearing 29.
- a resolver 30 is provided at the right end of the motor housing 19 in the electric motor 18 in FIG.
- the resolver 30 is composed of a base 31 fixed to the end wall 19a of the motor housing 19 and a cover 32 having a peripheral edge fixed to the base 31 and a shallow circular hollow portion 32a formed therein. It has.
- a fitting hole 34 into which the boss portion 19 b of the motor housing 19 can be fitted is provided in the center of a base plate (base) 31 made of iron.
- base plate 31 made of iron.
- shallow annular sheet coil receiving grooves 35 and 36 having different diameters are provided concentrically with the fitting hole 34 as the center.
- the bottom surface of the outer sheet coil housing groove 35 is disposed closer to the electric motor 18 than the bottom surface of the inner sheet coil housing groove 36.
- a rotating plate 37 that faces the base plate 31 has a boss portion 38 provided at the center thereof fitted on the small-diameter shaft 17a protruding into the hollow portion 32a. , By fixing with a set screw 39.
- shallow annular sheet coil receiving grooves 40 and 41 having different diameters are provided concentrically around the boss portion 38.
- the bottom surface of the outer sheet coil housing groove 40 is disposed closer to the base plate 31 than the bottom surface of the inner sheet coil housing groove 41.
- the first sheet coil 43 provided with the detection winding 42 is similarly accommodated in the sheet coil housing groove 40 on the facing surface of the rotating plate 37 facing the base plate 31.
- the groove 41 accommodates a second sheet coil 46 attached to the primary winding 45 of the output transformer 44 connected to the detection winding 42. That is, the first sheet coil 43 and the second sheet coil 46 are provided concentrically with the small-diameter shaft 17a on the opposite surface of the rotating plate 37 facing the base plate 31 with the second sheet coil 46 inside. Yes.
- a third sheet coil 48 provided with an excitation winding 47 facing the detection winding 42 is also formed in the sheet coil receiving groove 36.
- the third sheet coil 48 and the fourth sheet coil 50 are provided concentrically with the small-diameter shaft 17a on the facing surface of the base plate 31 facing the rotating plate 37, with the fourth sheet coil 50 inside.
- the first sheet coil 43 has a concave-convex pattern meandering inward and outward such that the outer shape of a spur gear is traced on one surface of a base material 43 a made of an insulating substrate such as a prepreg or a sheet.
- the detected winding 42 is formed in the same manner as the printed wiring.
- a primary winding 45 having a spiral pattern centered on the small-diameter shaft 17a is attached to one surface of the base material 46a made of the same material as the base material 43a in the same manner as the printed wiring. It is formed by.
- the excitation winding 47 in the third sheet coil 48 is composed of a first excitation winding 47a and a second excitation winding 47b whose phases in electrical angle are different from each other by 90 °, for example. That is, in the third sheet coil 48, the first excitation having a pattern in which the outer shape of the spur gear similar to the detection winding 42 is traced on one surface of the base material 48a made of the same material as the base material 43a.
- the winding 47a is attached in the same manner as the printed wiring, and the second excitation winding 47b having the same shape as the first excitation winding 47a is provided on the other surface of the base material 48a.
- the angle around the small-diameter shaft 17a is shifted from each other so that the electrical angle is different from that of the printed wiring.
- the fourth sheet coil 50 has a secondary winding 49 having a spiral pattern around the small-diameter shaft 17a, similar to the primary winding 45, on one side of the base material 50a made of the same material as the base material 43a. It is formed by attaching in the same manner as printed wiring.
- the windings 42, 45, 47 (47a, 47b), 49 in the first to fourth sheet coils 43, 46, 48, 50 are respectively the base materials. It is separated from 43a, 46a, 48a, and 50a, and is schematically shown. However, since the printed wiring is actually provided on the base materials 43a, 46a, 48a, and 50a, the thickness is extremely thin. Moreover, since the windings 42, 45, 47 (47a, 47b), 49 in the first to fourth sheet coils 43, 46, 48, 50 are provided in one plane, the resolver 30 can be made extremely thin. can do.
- the base plate 31 and the rotating plate 37 are each made of iron, the peripheral portions of the sheet coil housing grooves 35, 36, 40, and 41 act as iron cores.
- the detection winding 42 and the primary winding 45 on the rotating plate 37 side which is the rotor in the resolver 30 are connected in series to form a closed loop.
- the first excitation winding 47 a and the second excitation winding 47 b on the base plate 31 side which is the stator in the resolver 30 are connected to the first input circuit 53 and the second input circuit 54 of the input circuit 52 in the resolver control circuit 51.
- the first excitation winding 47a is supplied with a modulation signal S1 obtained by amplitude-modulating a high frequency signal from the first input circuit 53, and the second excitation winding 47b is supplied from the second input circuit 54.
- the modulation signal S2 obtained by amplitude-modulating the high-frequency signal such that the electrical angle differs from the modulation signal S1 by, for example, 90 ° is applied.
- the detection winding is detected.
- a combined voltage induced by the modulation signal S 1 and the modulation signal S 2 is generated as an output signal SO on the line 42, and this output signal SO passes through an output transformer 44 composed of a primary winding 45 and a secondary winding 49. Via the output circuit 55.
- the output signal SO is demodulated in a high-frequency signal separation circuit (not shown) and subjected to temperature correction or the like in a correction circuit (not shown) and then output as an angle detection signal SA.
- the detection signal SA is given to the angle control circuit 58 in the motor control circuit 57 via the A / D converter 56.
- the first input circuit 53 and the second input circuit 54 of the input circuit 52 generate the modulation signal S1 and the modulation signal S2, and the output processing circuit 55 demodulates or corrects the output signal SO.
- the apparatus and method are known in, for example, Japanese Patent Application Laid-Open No. 2000-292205 and are not directly related to the present invention, and therefore illustration and detailed description thereof are omitted.
- the angle control circuit 58 in the motor control circuit 57 based on the angle detection signal SA given from the output processing circuit 55 in the resolver control circuit 51, the exact position of the piston 10 and thus the second brake pad 11 is determined.
- the moving speed of the second brake pad 11 is calculated based on the position information and the time indicated by the timer (not shown), and the information is stored in a memory (not shown) and the motor An angle control signal SAc is given to the motor operation circuit 61 in the control circuit 57.
- the output signal of the load sensor 24 is given to the torque control circuit 60 in the motor control circuit 57 via the A / D converter 59 as the torque detection signal ST.
- the tightening force of the brake disc 2 by the brake pads 7 and 11 is obtained based on the torque detection signal ST applied from the load sensor 24, and the result is obtained as the torque control signal STc.
- the torque detection signal ST applied from the load sensor 24 is substantially proportional to the tightening force of the brake disc 2 by the brake pads 7 and 11, the brake disc 2 by the brake pads 7 and 11 is calculated from the torque detection signal ST. The tightening force can be determined.
- control for detecting an increase in the current value of the electric motor 18 and stopping the electric motor 18 has been performed.
- the tightening force of the brake disc 2 by the brake pads 7 and 11 is not necessarily proportional, and the operation of the electric motor 18 may be stopped in a state where the tightening force of the brake disc 2 by the brake pads 7 and 11 is not sufficient.
- the actual load forming the tightening force of the brake disc 2 by the brake pads 7 and 11 is detected in real time, and the electric motor 18 is quickly activated based on the detected load.
- the brake disc 2 by the brake pads 7 and 11 can be feedback controlled.
- the motor operating circuit 61 is connected to an operating means 62 such as a parking brake lever, a parking brake pedal, or a parking brake switch, an angle control circuit 58, and a torque control circuit 60.
- an operating means 62 such as a parking brake lever, a parking brake pedal, or a parking brake switch
- an angle control circuit 58 controls the position and the moving speed of the piston 10 and thus the second brake pad 11
- the torque control circuit 60 controls the brake pads 7 and 11.
- the tightening force of the brake disc 2 is controlled.
- step (S2) the position of the piston 10 is not within the preset movable range T, and the torque detection signal ST corresponds to the preset set value ST0 corresponding to the optimum tightening force of the brake disc 2.
- step (S6) the electric motor 18 is kept stopped (S7). However, if the torque detection signal ST does not reach the set value ST0 in step (S6), the electric motor 18 is maintained. 18 is rotated forward (S8). Thereafter, when the torque detection signal ST reaches the set value ST0 (S9), the electric motor 18 is stopped (S10) and the angle detection signal SA indicating the position of the piston 10 is detected.
- the upper limit T1 of the movable range T is corrected based on an angle detection signal SA indicating the position of the piston 10 at this time (S11). Therefore, when the angle detection signal SA indicating the position of the piston 10 reaches the upper limit T1 of the movable range T, the brake disc 2 is always tightened with the optimum tightening force.
- the above operation mode is only an example, and the electric motor 18 can be controlled in any manner depending on the setting method.
- the entire resolver 30 can be reduced in thickness by using all the coil portions as seat coils, thereby substantially allowing the resolver 30 to be incorporated into the electric parking brake, thereby providing a brake pad. It is possible to manage the tightening position and the tightening speed between the brake discs 7 and 11 and the brake disk 2.
- the position of the piston 10 is accurately detected by the resolver 30 and the moving speed of the piston 10 is detected by combining the resolver 30 and a timer (not shown). Furthermore, by making the electric motor 18 a DC motor capable of numerical control, the fastening speed of the brake disc 2 by the brake pads 7 and 11 can be managed.
- the electric motor 18 can be controlled without error.
- FIG. 7 is a schematic longitudinal sectional front view similar to FIG. 1 showing a resolver mounting portion in the second embodiment of the electric parking brake device of the present invention.
- the worm wheel 21 in the housing 15 is a rotor and the cover plate 16 is a stator, and a resolver 70 is provided between them.
- the resolver 70 is close to the outer peripheral portion of the bottom surface of the annular recess 21 a centered on the output shaft 12 formed on the outer surface of the worm wheel 21 that is a rotor.
- a first sheet coil 43 having a detection winding 42 provided on one side is provided, and a primary winding 45 in the output transformer 44 is provided on one side of the base material 46a, similarly to the center of the bottom surface of the recess 21a.
- a second sheet coil 46 is provided, near the outer peripheral portion of the facing surface of the cover plate 16 facing the bottom surface of the recess 21, the first exciting winding 47 a on one surface of the base material 48 a and the second on the other side surface.
- a third sheet coil 48 provided with an excitation winding 47b is provided, and is further provided on one side of the base material 50a near the center of the facing surface of the cover plate 16 facing the bottom surface of the recess 21. It has than that provided a fourth sheet coil 50 formed by attaching a secondary winding 49 in the transformer 44.
- the resolver 70 operates in the same manner as the resolver 30 and can provide the same effect.
- the resolver 70 is connected to the cover plate 16 that forms part of the housing 15 in the electric actuator 4. Since it is provided between the rotating shaft 17 of the electric motor 18 and the worm wheel 21 that rotates at a reduced speed, the electric motor 18 is less likely to be affected by heat and the like, and the conventional electric actuator is also used. Also, it is possible to achieve an effect that it can be easily incorporated without changing the configuration.
- the present invention is not limited only to the above-described embodiments, and can be implemented in various modified modes as follows, for example, without departing from the scope of the claims.
- the resolver is disposed between the rotating shaft 17 of the electric motor 18 and the motor housing 19 (first embodiment) or between the worm wheel 21 and the cover plate 16 (housing 15) (second embodiment). In addition, it is provided between a shaft that rotates in synchronization with the rotating shaft 17 of the electric motor 18, for example, an intermediate gear shaft when the speed reduction means is made of a gear train, and the housing of the speed reduction means.
- the speed reduction means is not composed of the worm 20 and the worm wheel 21, but is composed of a gear train.
- the power conversion means 14 for converting the rotary motion of the rotary shaft 17 of the electric motor 18 into a linear motion is a configuration other than the configuration consisting of the female screw hole 9 of the piston 10 and the male screw portion 13 of the output shaft 12, for example, rotation It shall consist of a cam and a cam follower or a piston-crank mechanism.
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Abstract
Description
(1)ハウジングに設けた電動モータの回転軸の回転運動を減速し、かつ直進運動に変換して押圧部材に伝達し、前記押圧部材によって付勢されたブレーキパッドが、車輪とともに回転するブレーキディスクを押圧することにより、前記車輪に制動力を発生させるようにし、かつ前記電動モータを制御装置により制御するようにした電動パーキングブレーキ装置において、前記モータの回転軸、またはそれと同期して回転する軸に固着した回転板と、前記回転板と対向するようにして、前記ハウジングに設けられているベースと、前記回転板における前記ベースに対向する対向面に設けられ、かつ検出巻線が付設されている第1シートコイルと、前記回転板における前記ベースに対向する対向面に設けられ、かつ前記検出巻線に接続された出力トランスの一次巻線が付設されている第2シートコイルと、前記回転板に対向するベースの対向面に設けられ、かつ前記検出巻線に対向する励磁巻線が付設されている第3シートコイルと、前記回転板に対向するベースの対向面に設けられ、かつ前記出力トランスの一次巻線に対向する前記出力トランスの二次巻線が付設されている第4シートコイルとによってレゾルバを構成し、かつ前記制御装置に、前記レゾルバにおける励磁巻線に励磁信号を入力させる入力回路と、前記出力トランスの二次巻線から発生する出力信号を処理する出力回路とを有するレゾルバ制御回路と、前記レゾルバ制御回路における出力回路の出力に基づいて、前記電動モータを制御するモータ制御回路とを設ける。
図1~図5は、本発明の電動パーキングブレーキ装置の第1の実施形態を示す。
この電動パーキングブレーキ装置1は、車両の運転席に設けたパーキングブレーキレバー、パーキングブレーキペダル、またはパーキングブレーキスイッチ(いずれも図示略)を操作することにより作動させられるようになっており(図4における操作手段62参照)、かつ車両の車輪(図示略)とともに回転するブレーキディスク2と、このブレーキディスク2の周辺を跨ぐようにして、車体(図示略)に取付けられたパーキングブレーキ本体3と、このパーキングブレーキ本体3の側面に取付けられた電動アクチュエータ4と、制御装置5(図4参照)とからなっている。
エンドキャップ26の中心に設けた雌ねじ孔27に螺合されている調節ねじ28の右端は、荷重センサ24の先端である左端に圧接しており、荷重センサ24は、調節ねじ28の右端に作用するスラスト荷重を検出しうるようになっている。
なお、電動モータ18の内部構造については、本発明に直接関係しないため、図示および詳細な説明は省略する。
この緩衝材29aの弾性変形の許容範囲内において、回転軸17は軸線方向に移動可能であり、この回転軸17が図2の左方に移動することによって、回転軸17のスラスト荷重、ひいては、回転軸17、ウォーム20、およびウォームホイール21のトルクの変動、並びに、ブレーキディスク2に対する第1のブレーキパッド7および第2のブレーキパッド11の押圧力の変動、すなわち、車輪に対する制動力の変動を、荷重センサ24によって検出することができる。
また、緩衝材29aを省略し、回転軸17の右端とモータハウジング19の端部壁19a、またはラジアル-スラスト軸受29との間に、目視し得ない程度の微小な間隙を設けるだけでもよい。
ベース板31の右側面には、互いに径の異なる浅い円環状のシートコイル収容溝35、36が、嵌合孔34を中心とする同心円状に設けられている。
外方のシートコイル収容溝35の溝底面は、内方のシートコイル収容溝36の溝底面より電動モータ18寄りに配置されている。
外方のシートコイル収容溝40の溝底面は、内方のシートコイル収容溝41の溝底面よりベース板31寄りに配置されている。
すなわち、ベース板31と対向する回転板37の対向面には、第1シートコイル43と第2シートコイル46とが、第2シートコイル46を内側として、小径軸17aと同心円状に設けられている。
すなわち、回転板37と対向するベース板31の対向面には、第3シートコイル48と第4シートコイル50とが、第4シートコイル50を内側として、小径軸17aと同心円状に設けられている。
すなわち、第3シートコイル48においては、基材43aと同様の材質とした基材48aの一方の面に、検出巻線42と同様の平歯車の外形をトレースしたようなパターンとした第1励磁巻線47aを、プリント配線と同様にして付設し、かつ基材48aの他方の面に、第1励磁巻線47aと同様の形状とした第2励磁巻線47bを、第1励磁巻線47aに対して電気角が異なるように、小径軸17aを中心とする角度を、互いにずらして、プリント配線と同様にして付設することにより形成されている。
しかも、第1~第4シートコイル43、46、48、50における各巻線42、45、47(47a、47b)、49は、一平面内に1本としてあるので、レゾルバ30を、著しく薄型化することができる。
図4に示すように、レゾルバ30におけるロータである回転板37側の検出巻線42と一次巻線45とは互いに直列接続されて、閉ループ状をなしている。
すなわち、荷重センサ24から付与されたトルク検出信号STは、ブレーキパッド7、11によるブレーキディスク2の締め付け力にほぼ比例しているので、トルク検出信号STから、ブレーキパッド7、11によるブレーキディスク2の締め付け力を割り出すことができる。
なお、従来の電動モータ18の電流値の上昇により、電動モータ18を停止させる制御と、この実施形態におけるトルク制御回路60により、ブレーキパッド7、11によるブレーキディスク2の締め付け力を検出し、それに基づいて電動モータ18を制御する方式とを併用してもよい。
図5に示すように、操作手段62により、ブレーキ作動信号がモータ作動回路61に付与されたとき(S1)、角度制御回路58において、角度検出信号SAに基づいて割り出されたピストン10の位置が、予め設定しておいた移動可能範囲T内にあるときは(S2)、電動モータ18は、ピストン10を進出させる方向に回転させられ(以下、この方向の回転を正転という)(S3)、ピストン10の位置を示す角度検出信号SAが移動可能範囲Tの上限T1に達すると(S4)、電動モータ18の正転は停止させられる(S5)。
この間に、ピストン10の進出により、第2のブレーキパッド11がブレーキディスク2に当接し、その後さらに第1のブレーキパッド7がブレーキディスク2に当接し、両ブレーキパッド7、11により、ブレーキディスク2が最適な締め付け力で締め付けられることは、後の説明から明らかになると思う。
したがって、ピストン10の位置を示す角度検出信号SAが移動可能範囲Tの上限T1に達したときは、常にブレーキディスク2は最適な締め付け力で締め付けられることになる。
この第2の実施形態においては、ハウジング15内におけるウォームホイール21をロータとし、かつ蓋板16をステータとして、それらの間にレゾルバ70を設けてある。
(1) レゾルバを、電動モータ18の回転軸17とモータハウジング19との間(第1の実施形態)や、ウォームホイール21と蓋板16(ハウジング15)との間(第2の実施形態)だけでなく、電動モータ18の回転軸17と同期して回転する軸、例えば、減速手段を歯車列からなるものとしたときの中間歯車の軸等と、減速手段のハウジングとの間に設ける。
(2) 減速手段を、ウォーム20とウォームホイール21とからなるものではなく、歯車列からなるものとする。
(3) 電動モータ18の回転軸17の回転運動を直進運動に変換する動力変換手段14を、ピストン10の雌ねじ孔9と出力軸12の雄ねじ部13とからなる構成以外の構成、例えば、回転カムとカムフォロワとからなるもの、またはピストン-クランク機構からなるもの等とする。
2 ブレーキディスク
3 パーキングブレーキ本体
4 電動アクチュエータ
5 制御装置
6 ハウジング
6a凹入部
7 第1のブレーキパッド
8 シリンダ
9 雌ねじ孔
10 ピストン(押圧部材)
11 第2のブレーキパッド
12 出力軸
13 雄ねじ部
14 動力変換手段
15 ハウジング
15a開口部
16 蓋板
17 回転軸
17a小径軸
18 電動モータ
19 モータハウジング
19a端部壁
19bボス部
20 ウォーム
21 ウォームホイール
21a凹部
22 凹溝
23 球体
24 荷重センサ
25 ラジアル軸受
26 エンドキャップ
27 雌ねじ孔
28 調節ねじ
29 ラジアル-スラスト軸受
29a緩衝材
30 レゾルバ
31 ベース板(ベース)
32 カバー
32a中空部
33 レゾルバハウジング
34 嵌合孔
35、36 シートコイル収容溝
37 回転板
38 ボス部
39 止めねじ
40、41 シートコイル収容溝
42 検出巻線
43 第1シートコイル
43a基材
44 出力トランス
45 一次巻線
46 第2シートコイル
46a基材
47 励磁巻線
47a第1励磁巻線
47b第2励磁巻線
48 第3シートコイル
48a基材
49 二次巻線
50 第4シートコイル
50a基材
51 レゾルバ制御回路
52 入力回路
53 第1入力回路
54 第2入力回路
55 出力処理回路
56 A/D変換器
57 モータ制御回路
58 角度制御回路
59 A/D変換器
60 トルク制御回路
61 モータ作動回路
62 操作手段
S1、S2 変調信号
SO 出力信号
SA 角度検出信号
SAc角度制御信号
ST トルク検出信号
STcトルク制御信号
ST0設定値
T 移動可能範囲
T1上限
T0下限
Claims (5)
- ハウジングに設けた電動モータの回転軸の回転運動を減速し、かつ直進運動に変換して押圧部材に伝達し、前記押圧部材によって付勢されたブレーキパッドが、車輪とともに回転するブレーキディスクを押圧することにより、前記車輪に制動力を発生させるようにし、かつ前記電動モータを制御装置により制御するようにした電動パーキングブレーキ装置において、
前記モータの回転軸、またはそれと同期して回転する軸に固着した回転板と、
前記回転板と対向するようにして、前記ハウジングに設けられているベースと、
前記回転板における前記ベースに対向する対向面に設けられ、かつ検出巻線が付設されている第1シートコイルと、
前記回転板における前記ベースに対向する対向面に設けられ、かつ前記検出巻線に接続された出力トランスの一次巻線が付設されている第2シートコイルと、
前記回転板に対向するベースの対向面に設けられ、かつ前記検出巻線に対向する励磁巻線が付設されている第3シートコイルと、
前記回転板に対向するベースの対向面に設けられ、かつ前記出力トランスの一次巻線に対向する前記出力トランスの二次巻線が付設されている第4シートコイル
とによってレゾルバを構成し、かつ
前記制御装置に、
前記レゾルバにおける励磁巻線に励磁信号を入力させる入力回路と、前記出力トランスの二次巻線から発生する出力信号を処理する出力回路とを有するレゾルバ制御回路と、
前記レゾルバ制御回路における出力回路の出力に基づいて、前記電動モータを制御するモータ制御回路とを設けたことを特徴とする電動パーキングブレーキ装置。 - 第1~第4シートコイルにおける各巻線を、一平面内に1本としたことを特徴とする請求項1記載の電動パーキングブレーキ装置。
- 第1シートコイルと第2シートコイル、およびそれらに対向する第3シートコイルと第4シートコイルを、モータの回転軸、またはそれと同期して回転する軸を中心とする同心円状に配設したことを特徴とする請求項1または2記載の電動パーキングブレーキ装置。
- 励磁巻線を、第1励磁巻線と第2励磁巻線とからなるものとし、前記第1励磁巻線を、第3シートコイルの表面に、前記第2励磁巻線を、前記第3シートコイルの裏面に、互いに電気角での位相を異ならせてそれぞれ付設したことを特徴とする請求項1~3のいずれかに記載の電動パーキングブレーキ装置。
- 電動モータの回転軸の回転運動を減速する減速手段が、前記回転軸に設けたウォームと、前記ウォームに噛合し、かつ前記回転軸の回転運動を直進運動に変換する動力変換手段に連係されたウォームホイールとを備えるものとし、かつハウジングに、前記回転軸の軸線方向に作用するスラスト荷重を検出する荷重センサを設け、さらに、制御装置に、前記荷重センサから付与されたトルク検出信号に基づいて、ブレーキパッドによるブレーキディスクの締め付け力を求めるようにしたトルク制御回路を設け、このトルク制御回路からの出力と、レゾルバ制御回路における出力回路からの出力に基づいて、モータ制御回路により、電動モータを制御するようにしたことを特徴とする請求項1~4のいずれかに記載の電動パーキングブレーキ装置。
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| JP2016509209A JP5945090B1 (ja) | 2015-11-13 | 2015-11-13 | 電動パーキングブレーキ装置 |
| US15/311,389 US10308230B2 (en) | 2015-11-13 | 2015-11-13 | Electric parking brake device |
| PCT/JP2015/082047 WO2017081827A1 (ja) | 2015-11-13 | 2015-11-13 | 電動パーキングブレーキ装置 |
| CN201580041188.7A CN108430843A (zh) | 2015-11-13 | 2015-11-13 | 电动驻车制动装置 |
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- 2015-11-13 KR KR1020177000307A patent/KR101871125B1/ko not_active Expired - Fee Related
- 2015-11-13 US US15/311,389 patent/US10308230B2/en not_active Expired - Fee Related
- 2015-11-13 JP JP2016509209A patent/JP5945090B1/ja not_active Expired - Fee Related
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022187558A (ja) * | 2021-06-08 | 2022-12-20 | 曙ブレーキ工業株式会社 | ディスクブレーキ装置用モータギヤユニット及びディスクブレーキ装置 |
| JP7597654B2 (ja) | 2021-06-08 | 2024-12-10 | 曙ブレーキ工業株式会社 | ディスクブレーキ装置用モータギヤユニット及びディスクブレーキ装置 |
| JP7597654B6 (ja) | 2021-06-08 | 2025-01-06 | 曙ブレーキ工業株式会社 | ディスクブレーキ装置用モータギヤユニット及びディスクブレーキ装置 |
| JP7649722B2 (ja) | 2021-09-21 | 2025-03-21 | 日立Astemo株式会社 | ディスクブレーキ |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3196085B1 (en) | 2018-12-12 |
| KR20170125007A (ko) | 2017-11-13 |
| EP3196085A1 (en) | 2017-07-26 |
| US10308230B2 (en) | 2019-06-04 |
| US20180236991A1 (en) | 2018-08-23 |
| EP3196085A4 (en) | 2017-12-27 |
| JPWO2017081827A1 (ja) | 2017-11-09 |
| CN108430843A (zh) | 2018-08-21 |
| JP5945090B1 (ja) | 2016-07-05 |
| KR101871125B1 (ko) | 2018-07-20 |
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