JP5705680B2 - Electric brake device - Google Patents

Description

  The present invention relates to an electric brake device including a parking lock mechanism, and to a technique for preventing the electric brake device from freezing without releasing a braking force.

Normally, when a vehicle is parked, the vehicle is prevented from moving by using a parking brake that is mechanically independent from a so-called foot brake (also called a service brake). However, in the winter or cold regions, etc., there is if the parking brake can not be released frozen. Therefore, in a cold district or the like, the parking brake is not used when the vehicle is parked. For example, the automatic transmission is set to the parking range, and the locking portion in the automatic transmission is locked to the locked portion. It has been proposed to prevent the movement of the camera simply.
For example, in cold districts and the like, in order to prevent the electric parking brake from freezing while the vehicle is parked, a technique for releasing the electric parking brake when a sensor that detects the outside air temperature of the vehicle reaches a freezing temperature has been proposed (patent) Reference 1).

JP 2005-082035 A

  In the above conventional technique, the electric parking brake is released and the vehicle is prohibited from moving by the parking lock mechanism of the automatic transmission. However, the parking lock mechanism using the automatic transmission is an auxiliary mechanism, such as a slope. Then, a load is applied to the automatic transmission. If an excessive load is applied to the automatic transmission and a problem occurs in the locked state between the locking portion and the locked portion in the automatic transmission, the vehicle may move undesirably.

  An object of the present invention is to provide an electric brake device that can reliably prevent freezing with a simple configuration without releasing a braking force during parking.

Electric brake system of the first invention in this inventions, an electric motor, the braking force loading mechanism for loading a braking force to the wheel by the output of the electric motor, the braking force slack operation of the braking force loading mechanism An electric brake device having a lock mechanism that can be switched between a locked state to be blocked and an unlocked state to be allowed, and provided with a temperature sensor that detects an outside air temperature of the vehicle or a temperature of the electric brake device, and the braking force load mechanism to load the braking force, and, energization when the lock mechanism is in a locked state, the temperature sensor detects the temperature of the frozen just before the set electric brake device, the electric dynamic motor while maintaining the locked state The anti-freezing energization means for controlling to start is provided.

  According to this configuration, when traveling, the locking mechanism is set to the unlocked state and the electric motor is driven so that the braking force load mechanism applies a braking force to the wheels. When the vehicle is parked, the vehicle is prohibited from moving by switching the lock mechanism to the locked state while the braking force load mechanism applies a braking force to the wheels. By setting the lock mechanism to the locked state, the braking force is maintained even when the electric motor is stopped. If the lock mechanism is frozen during parking, the lock cannot be released. However, when the vehicle is parked, the temperature sensor detects the outside air temperature of the vehicle or the temperature of the electric brake device. When the braking force load mechanism applies a braking force and the lock mechanism is in the locked state, the anti-freezing energization means energizes the electric motor when the temperature sensor detects the temperature immediately before freezing of the set electric brake device. Control to start. By energizing the electric motor, the motor itself generates heat using the motor coil as a heat source, thereby raising the temperature of the electric brake device. Thereby, at the time of parking, freezing of the lock mechanism etc. of an electric brake device can be prevented reliably, and unlocking etc. can be performed normally. Therefore, the vehicle can be started without delay. Since the motor coil is used as a heat source in this manner, a heat source dedicated to freeze prevention is not necessary, and freeze prevention can be performed with a simple configuration.

An electric brake device according to a second aspect of the present invention includes an electric motor, a braking force load mechanism that applies a braking force to the wheels by the output of the electric motor, and a braking force slackening operation of the braking force load mechanism is inhibited. An electric brake device provided with a lock mechanism that can be switched between a locked state to be allowed and an allowed unlocked state, provided with a temperature sensor that detects an outside air temperature of the vehicle or a temperature of the electric brake device, and the braking force load mechanism When the braking force is applied and the lock mechanism is in the locked state, the anti-freeze energization that controls the electric motor to start energization when the temperature sensor detects the temperature immediately before the set electric brake device is frozen. means provided before Symbol antifreeze energizing means in a direction to increase the braking force by the braking force load mechanism, Ru is energized the electric motor. In this case, the electric motor tries to rotate, but the braking force load mechanism applies a braking force and a pressing reaction force is generated, so that the rotation of the electric motor is limited .
According to a third aspect of the present invention, there is provided an electric brake device comprising: an electric motor; a braking force load mechanism that applies a braking force to wheels by an output of the electric motor; and a braking force slackening operation of the braking force load mechanism is inhibited. An electric brake device provided with a lock mechanism that can be switched between a locked state to be allowed and an allowed unlocked state, provided with a temperature sensor that detects an outside air temperature of the vehicle or a temperature of the electric brake device, and the braking force load mechanism When the braking force is applied and the lock mechanism is in the locked state, the anti-freeze energization that controls the electric motor to start energization when the temperature sensor detects the temperature immediately before the set electric brake device is frozen. means provided before Symbol antifreeze energizing means in the direction of braking force by the braking force loading mechanism is reduced, Ru is energized the electric motor. In this case, since the lock mechanism is in the locked state, the rotation of the electric motor is limited. Therefore, the braking force by the braking force load mechanism is not actually reduced.

The anti-freezing energization means may repeatedly energize and interrupt the electric motor at regular intervals while the temperature sensor detects the set temperature. After the start of energization of the electric motor, the temperature detected by the temperature sensor tends to increase with time, for example. By continuously energizing the electric motor after that, it is possible to reliably prevent the electric brake device from freezing without causing a tendency to decrease in temperature. Further, when the electric motor is energized for a relatively long time and the motor itself becomes high temperature, the temperature tends to be difficult to decrease even if the electric motor is temporarily cut off.
Therefore, the anti-freezing energization means repeats energization and interruption of the electric motor at regular intervals, thereby reducing the load on the battery and increasing the power generation efficiency compared with the case of continuously energizing the electric motor. Freezing of the brake device can be prevented. Although it is conceivable to continuously energize the electric motor and reduce the current supplied to the electric motor when the temperature rises to a predetermined level, when the vehicle is parked for a long time, for example, there is a difference in temperature between day and night. When the current is large, the load on the battery can be reduced and the control can be easily performed by repeatedly energizing and interrupting the electric motor at regular intervals, rather than performing current control while continuously energizing.
A reduction mechanism that decelerates the rotation of the electric motor may be provided, and the braking force load mechanism may convert a rotational motion output from the reduction mechanism into a linear motion and apply a braking force to the wheels.

According to a fourth aspect of the present invention, there is provided an electric brake device comprising: an electric motor; a braking force load mechanism that applies a braking force to wheels by an output of the electric motor; and a braking force slackening operation of the braking force load mechanism is inhibited. An electric brake device provided with a lock mechanism that can be switched between a locked state to be allowed and an allowed unlocked state, provided with a temperature sensor that detects an outside air temperature of the vehicle or a temperature of the electric brake device, and the braking force load mechanism When the braking force is applied and the lock mechanism is in the locked state, the anti-freeze energization that controls the electric motor to start energization when the temperature sensor detects the temperature immediately before the set electric brake device is frozen. means is provided, has a starting operation detection means for detecting a detection signal indicative of vehicle starting operation of vehicles, the antifreeze energizing means, the braking force loading mechanism braking force Load was, and, in the locking mechanism is locked, while detecting a temperature of the temperature sensor is set, upon detecting a detection signal indicative of a start operation of the vehicle by starting operation detection means, intends row energization to the electric motor . Prevention of freezing of the parking time of the electric brake is carried out at power supply to the electric motor by the temperature detector, the setting temperature at which the energization is too high, it is more power consumption of the battery. In order to reduce power consumption, freezing may occur when the set temperature is lowered. Even if such a slight freezing occurs, if the detection signal indicating the start operation of the vehicle is detected and the electric motor is energized as described above, the freezing of the electric brake device can be quickly eliminated. Thus, the vehicle can be started without delay.

The start operation detecting means may use a vehicle door “open” as a detection signal.
The start operation detecting means may use a detection signal indicating vehicle door lock release.
The start operation detecting means may use a vehicle ignition signal “ON” as a detection signal.
The start operation detecting means may include a sensor that detects that the driver is seated on the driver's seat side seat of the vehicle.
The start operation detecting means may use a pedal operation for applying a braking force to the wheel as a detection signal.
An automobile according to the present invention includes any one of the electric brake devices.

Electric brake system of the first invention in this inventions, an electric motor, the braking force loading mechanism for loading a braking force to the wheel by the output of the electric motor, the braking force slack operation of the braking force loading mechanism An electric brake device comprising a lock mechanism that can be switched between a locked state to be blocked and an unlocked state to be allowed is provided with a temperature sensor that detects an outside air temperature of the vehicle or a temperature of the electric brake device, and the braking force load mechanism includes: a braking force to the load, and, when the lock mechanism is in a locked state, the start temperature sensor detects the temperature of the frozen just before the set electric brake system, the current to the electric dynamic motor while maintaining the locked state The anti-freeze energization means that controls to prevent the freezing with a simple structure without releasing the braking force when parking. Rukoto can, can start a normal traveling.
An electric brake device according to a second aspect of the present invention includes an electric motor, a braking force load mechanism that applies a braking force to the wheels by the output of the electric motor, and a braking force slackening operation of the braking force load mechanism is inhibited. An electric brake device provided with a lock mechanism that can be switched between a locked state to be allowed and an allowed unlocked state, provided with a temperature sensor that detects an outside air temperature of the vehicle or a temperature of the electric brake device, and the braking force load mechanism When the braking force is applied and the lock mechanism is in the locked state, the anti-freeze energization that controls the electric motor to start energization when the temperature sensor detects the temperature immediately before the set electric brake device is frozen. Means (premise configuration), the anti-freezing energization means for energizing the electric motor in the direction of improving the braking force by the braking force load mechanism, During a car, without releasing the braking force, it is possible to reliably prevent freezing with a simple configuration, it can be started normally travel.
In the electric brake device according to a third aspect of the present invention, in the premise configuration, the anti-freezing energizing means energizes the electric motor in a direction in which the braking force by the braking force load mechanism is reduced. Without releasing the power, freezing can be reliably prevented with a simple configuration, and traveling can be started normally.
According to a fourth aspect of the present invention, there is provided an electric brake device according to the fourth aspect of the present invention, wherein the premise configuration includes a start operation detecting means for detecting a detection signal representing a start operation of the vehicle in the premise configuration, When the power load mechanism applies a braking force, and the lock mechanism is in the locked state and the temperature sensor detects the set temperature, when the detection signal indicating the start operation of the vehicle is detected by the start operation detecting means, Since the electric motor is energized, freezing can be reliably prevented with a simple configuration without releasing the braking force during parking, and normal running can be started.

It is sectional drawing of the electric brake device which concerns on 1st Embodiment of this invention. It is an expanded sectional view of the deceleration mechanism of the same electric brake device. It is an expanded sectional view of the lock mechanism of the electric brake device. It is a block diagram of a control system of the electric brake device. It is a figure showing the relationship between the preset temperature by a temperature sensor and time in the electric brake device. It is a figure showing the relationship between the preset temperature by a temperature sensor, and time in the electric brake device which concerns on other embodiment of this invention. It is a figure showing the relationship between the preset temperature by a temperature sensor, and time in the electric brake device which concerns on further another embodiment of this invention. It is a block diagram of the control system of the electric brake device which concerns on further another embodiment of this invention.

A first embodiment of the present invention will be described with reference to FIGS. The electric brake device according to this embodiment serves as both a service brake used when the vehicle is driven and a parking brake used when the vehicle is stopped. The electric brake device can be used as a service brake by setting a lock mechanism described later to an unlocked state, and the electric brake device can be used as a parking brake by setting the lock mechanism to a locked state.
As shown in FIG. 1, the electric brake device includes a housing 1, an electric motor 2, a speed reduction mechanism 3 that decelerates rotation of the electric motor 2, a braking force load mechanism 4, a lock mechanism 5, a temperature sensor. 6 (FIG. 4) and anti-freezing energizing means 7 (FIG. 4). A base plate 8 extending radially outward is provided at the open end of the housing 1, and the electric motor 2 is supported on the base plate 8. In the housing 1, a braking force load mechanism 4 that loads a braking force to wheels, in this example, a brake disk 9, is incorporated by the output of the electric motor 2. The opening end of the housing 1 and the outer surface of the base plate 8 are covered with a cover 10.

The braking force load mechanism 4 will be described.
The braking force load mechanism 4 is a so-called linear motion mechanism that loads the braking force on the wheels by converting the rotational motion output from the speed reduction mechanism 3 into a linear motion. The braking force load mechanism 4 includes a slide member 11, a bearing member 12, an annular thrust plate 13, a thrust bearing 14, rolling bearings 15 and 15, a rotating shaft 16, a carrier 17, a sliding bearing 18, 19. A cylindrical slide member 11 is supported on the inner peripheral surface of the housing 1 so as to be prevented from rotating and movable in the axial direction. On the inner peripheral surface of the slide member 11, a spiral protrusion 11 a that protrudes a predetermined distance radially inward and is formed in a spiral shape is provided. A plurality of planetary rollers, which will be described later, mesh with the spiral protrusion 11a.

  A bearing member 12 is provided on one end side in the axial direction of the slide member 11 in the housing 1. The bearing member 12 has a flange portion extending radially outward and a boss portion. Rolling bearings 15 and 15 are fitted into the boss portions, and a rotary shaft 16 is fitted to the inner ring inner surface of each of the bearings 15 and 15. Therefore, the rotating shaft 16 is rotatably supported by the bearing member 12 via the bearings 15 and 15.

  A carrier 17 is provided on the inner periphery of the slide member 11 so as to be rotatable about the rotary shaft 16. The carrier 17 includes disks 17a and 17b that are arranged to face each other in the axial direction. The disk 17b close to the bearing member 12 may be referred to as an inner disk 17b, and the disk 17a may be referred to as an outer disk 17a. Of the one disk 17a, a side surface facing the other disk 17b is provided with an interval adjusting member 17c protruding in the axial direction from the outer peripheral edge portion on this side surface. In order to adjust the interval between the plurality of planetary rollers 20, a plurality of the interval adjusting members 17 c are arranged at intervals in the circumferential direction. The discs 17a and 17b are integrally provided by the distance adjusting member 17c.

  The inner disk 17b is supported by a slide bearing 18 fitted between the inner shaft 17b and the inner shaft 17b so as to be rotatable and movable in the axial direction. A shaft insertion hole is formed at the center of the outer disk 17a, and a slide bearing 19 is fitted in the shaft insertion hole. The outer disk 17a is rotatably supported on the rotary shaft 16 by a slide bearing 19. A washer that receives a thrust load is fitted to the end of the rotating shaft 16, and a retaining ring for preventing the washer from coming off is provided.

  The carrier 17 is provided with a plurality of roller shafts 21 at intervals in the circumferential direction. Both end portions of each roller shaft 21 are supported across the disks 17a and 17b. That is, the discs 17a and 17b are formed with a plurality of shaft insertion holes each having a long hole, and both end portions of the roller shafts 21 are inserted into the shaft insertion holes, and the roller shafts 21 are supported so as to be movable in the radial direction. The An elastic ring 22 that urges the roller shafts 21 radially inward is stretched around the plurality of roller shafts 21.

A planetary roller 20 is rotatably supported on each roller shaft 21, and each planetary roller 20 is interposed between the outer peripheral surface of the rotary shaft 16 and the inner peripheral surface of the slide member 11. Each planetary roller 20 is pressed against the outer peripheral surface of the rotating shaft 16 by the urging force of the elastic ring 22 spanned across the plurality of roller shafts 21. As the rotating shaft 16 rotates, each planetary roller 20 that contacts the outer peripheral surface of the rotating shaft 16 rotates due to contact friction. On the outer peripheral surface of the planetary roller 20, a spiral groove that meshes with the spiral protrusion 11a of the slide member 11 is formed.
A washer and a thrust bearing (both not shown) are interposed between the inner disk 17b of the carrier 17 and one axial end of the planetary roller 20. In the housing 1, an annular thrust plate 13 and a thrust bearing 14 are provided between the inner disk 17 b and the bearing member 12.

The deceleration mechanism 3 will be described.
As shown in FIG. 2, the speed reduction mechanism 3 is a mechanism that transmits the rotation of the electric motor 2 at a reduced speed to the output gear 23 fixed to the rotation shaft 16, and includes a plurality of gear trains. In this example, the speed reduction mechanism 3 is fixed to the end of the rotary shaft 16 by sequentially reducing the rotation of the input gear 24 attached to the rotor shaft 2 a of the electric motor 2 by the gear trains 25, 26 and 27. Transmission to the output gear 23 is possible.

The lock mechanism 5 will be described.
As shown in FIG. 3, the lock mechanism 5 is configured to be switchable between a locked state where the braking force slack operation of the braking force load mechanism 4 (FIG. 2) is blocked and an allowed unlocked state. In the round frame A of FIG. 3, the locked state of the locking mechanism 5 is represented by a two-dot chain line, and the unlocked state is represented by a solid line. The deceleration mechanism 3 is provided with a lock mechanism 5. In other words, a plurality of locking holes 28 a are formed at regular intervals in the circumferential direction in the output side intermediate gear 28 of the gear train 26. A lock pin 29 is provided at one point on the pitch circle of the locking holes 28a so as to be advanced and retracted by a linear solenoid 30 which is a pin driving actuator. The linear solenoid 30 is supported by the base plate 8, and a pin hole that allows the lock pin 29 to advance and retreat is formed in the base plate 8. The lock pin 29 is advanced by the linear solenoid 30 and engaged with the locking hole 28a, and the rotation of the intermediate gear 28 is prohibited, so that the lock mechanism 5 is brought into a locked state as indicated by a two-dot chain line in the round frame A. To do. On the contrary, the lock pin 5 is retracted to be disengaged from the locking hole 28a and the rotation of the intermediate gear 28 is allowed, so that the lock mechanism 5 can be unlocked as shown by the solid line in the round frame A.

The temperature sensor 6 and the freeze prevention energizing means 7 will be described.
As shown in FIG. 4, the vehicle is provided with an ECU 31 that is an electric control unit that controls the entire vehicle, and a temperature sensor 6 that detects an outside air temperature of the vehicle. A temperature sensor 6 is attached to, for example, a knuckle arm of the vehicle. The ECU 31 mainly includes a travel control unit 31a and a general control unit 31b. The traveling control unit 31 a issues an acceleration / deceleration command from an acceleration command output from the sensor 38 according to the depression amount of the accelerator pedal 37 and a deceleration command output from the sensor 33 according to the operation amount of the brake pedal 32. Generate. In this example, the temperature sensor 6 is provided on the knuckle arm of the vehicle main body, but is not limited to this form. When the space between the housing 1 and the speed reduction mechanism 3 freezes, a temperature sensor 6 may be provided in the electric brake device, for example, the housing 1 to detect the temperature of the electric brake device. In this case, the temperature immediately before freezing of the electric brake device can be detected more accurately.

The general control unit 31b has a function of controlling the brake control unit 31ba, the freeze prevention energizing means 7, and various auxiliary machine systems (not shown). The brake control unit 31ba is means for controlling the electric brake device as a parking brake when the vehicle is stopped. The brake control unit 31ba can drive the linear solenoid 30 via the drive circuit 35 based on the detection signal of the sensor 33 and the operation command of the lock mechanism operation unit 34.
An inverter device 39 is connected to the ECU 31, and the inverter device 39 includes a power circuit unit 39a provided for each electric motor 2 and a motor control unit 39b for controlling the power circuit unit 39a. The motor control part 39b may be provided in common with respect to each power circuit part 39a, or may be provided separately.

The motor control unit 39b includes a computer, a program executed on the computer, and an electronic circuit. The motor control unit 39b converts the current control command into a current command according to the deceleration command given from the travel control unit 31a or the brake control unit 31ba, and gives the current command to the PWM driver of the power circuit unit 39a.
When the braking force load mechanism 4 applies a braking force and the lock mechanism 5 is in the locked state, the anti-freezing energization means 7 detects the set temperature immediately before freezing of the electric brake device. The electric motor 2 is controlled to start energization. The set temperature immediately before freezing of the electric brake device can be arbitrarily determined based on a temperature of 0 ° C. When the temperature sensor 6 detects the outside air temperature, if the temperature in the housing 1 of the electric brake device is kept relatively higher than the outside air temperature, the temperature immediately before freezing of the electric brake device is determined as the temperature sensor. The temperature may be corrected to be lower than the outside air temperature detected in 6.

As described above, the anti-freezing energizing means 7 has three conditions, that is, (1) the braking force load mechanism 4 applies the braking force, (2) the lock mechanism 5 is in the locked state, (3) the temperature sensor. When all of 6 is equal to or lower than the set temperature, the electric motor 2 is energized in a direction in which the braking force by the braking force load mechanism 4 is improved. In this case, the electric motor 2 tries to rotate, but the braking force load mechanism 4 applies a braking force and a pressing reaction force is generated, so that the rotation of the electric motor 2 is limited. The freeze prevention energization means 7 always detects the outside air temperature with the temperature sensor 6. When the temperature sensor 6 becomes higher than the set temperature by energizing the electric motor 2, the freeze prevention energizing means 7 interrupts the energization of the electric motor 2. As shown in FIG. 5, the set temperature is different between energization and shut-off, and an energization set temperature T1 and a shut-off set temperature T2 are set, respectively. The energization set temperature T1 and the shut-off set temperature T2 are both set higher than the temperature 0 ° C., and the shut-off set temperature T2 is set higher than the energization set temperature T1.
The anti-freezing energizing means 7 may energize the electric motor 2 in a direction in which the braking force by the braking force load mechanism 4 is reduced when all the three conditions are satisfied. In this case, since the lock mechanism 5 is in the locked state, the rotation of the electric motor 2 is limited. Therefore, the braking force by the braking force load mechanism 4 is not actually reduced.

  According to the electric brake device described above, during driving, the locking mechanism 5 is set in an unlocked state and the electric motor 2 is driven so that the braking force load mechanism 4 applies a braking force to the wheels. During parking, the movement of the vehicle is prohibited by switching the lock mechanism 5 to the locked state while the braking force load mechanism 4 applies a braking force to the wheels. By setting the lock mechanism 5 to the locked state, the braking force is maintained even when the electric motor 2 is stopped. If the lock mechanism 5 or the like is frozen during parking, the lock cannot be released. However, when the vehicle is parked, the temperature sensor 6 detects the outside air temperature of the vehicle or the temperature of the electric brake device. When all the three conditions are satisfied when the vehicle is parked, the freeze prevention energizing means 7 controls the electric motor 2 to start energization. When the electric motor 2 is energized, the motor itself generates heat using the motor coil as a heat source, thereby increasing the temperature of the electric brake device. Thereby, at the time of parking, freezing of the lock mechanism 5 etc. of an electric brake device can be prevented reliably, and unlocking etc. can be performed normally. Therefore, the vehicle can be started without delay. Since the motor coil is used as a heat source in this manner, a heat source dedicated to freeze prevention is not necessary, and freeze prevention can be performed with a simple configuration.

As another embodiment, as shown in FIG. 6, when the electric motor 2 is started to be energized at the energization set temperature T _< b> 1 when the vehicle is parked, it is detected that the set temperature TH is higher than the temperature T _< b> 1. Thus, the current supplied to the electric motor 2 may be controlled to be small. In this case, it is possible to reduce the load on the battery mounted on the vehicle, rather than continuing to supply a constant current to the electric motor 2.
As shown in FIG. 7, the freeze prevention energizing means 7 may repeatedly energize and interrupt the electric motor 2 at regular intervals (every time t1) while detecting the temperature. After the start of energization of the electric motor 2, the temperature detected by the temperature sensor 6 tends to increase with time, for example. By continuously energizing the electric motor 2 thereafter, it is possible to reliably prevent the electric brake device from freezing without causing a temperature decrease tendency. In this case, however, a load is applied to the battery. Further, when the electric motor 2 is energized for a relatively long time and the motor itself becomes high temperature, the temperature tends to be difficult to decrease even if the electric motor 2 is temporarily de-energized.
Therefore, the freeze prevention energizing means 7 increases the power generation efficiency while reducing the load on the battery as compared with the case where the electric motor 2 is continuously energized by repeatedly energizing and interrupting the electric motor 2 at regular intervals. Thus, freezing of the electric brake device can be prevented. In the case where the parking time of the vehicle is long, for example, when there is a large difference in temperature between day and night, it is more repetitive to turn on and off the electric motor 2 at regular intervals than to perform current control while continuously energizing. Can be reduced and can be controlled easily.

As shown in FIG. 8, a start operation detecting means 36 for detecting a detection signal representing the start operation of the vehicle is provided, and the antifreezing energizing means 7 is provided with the braking force load mechanism 4 and the lock mechanism 5. When the temperature sensor 6 detects the set temperature in the locked state, the electric motor 2 may be energized when the start operation detecting means 36 detects a detection signal indicating the start operation of the vehicle. .
The start operation detection means 36 can apply the following detection signals.
-The vehicle door "open" is used as a detection signal.
・ The vehicle door lock release is used as a detection signal.
-The vehicle's ignition "ON" is used as a detection signal.
A detection signal by a sensor that detects that the driver is seated on the driver's seat of the vehicle. A pedal operation that applies braking force to the wheel is used as a detection signal.
Even if a slight freezing has occurred, as described above, if the electric motor 2 is energized when a detection signal indicating the start operation of the vehicle is detected, the freezing of the electric brake device can be quickly eliminated, The vehicle can be started without delay.

DESCRIPTION OF SYMBOLS 2 ... Electric motor 3 ... Deceleration mechanism 4 ... Braking force load mechanism 5 ... Lock mechanism 6 ... Temperature sensor 7 ... Antifreezing energization means 36 ... Starting operation detection means

Claims (12)

Switchable between an electric motor, a braking force load mechanism that applies a braking force to the wheels by the output of the electric motor, and a locked state that prevents the braking force slack operation of the braking force load mechanism and an allowed unlocked state An electric brake device equipped with a lock mechanism,
A temperature sensor is provided to detect the outside air temperature of the vehicle or the temperature of the electric brake device,
When the braking force load mechanism applies a braking force and the lock mechanism is in the locked state, the temperature sensor detects the set temperature immediately before freezing of the electric brake device, and maintains the locked state while maintaining the locked state. An electric brake device characterized by comprising anti-freezing energizing means for controlling energization of a dynamic motor. Switchable between an electric motor, a braking force load mechanism that applies a braking force to the wheels by the output of the electric motor, and a locked state that prevents the braking force slack operation of the braking force load mechanism and an allowed unlocked state An electric brake device equipped with a lock mechanism,
A temperature sensor is provided to detect the outside air temperature of the vehicle or the temperature of the electric brake device,
When the braking force load mechanism applies a braking force and the lock mechanism is in a locked state, when the temperature sensor detects the temperature immediately before freezing of the set electric brake device, the electric motor is started to be energized. Providing anti-freezing energizing means to control,
The anti-freezing energization means is an electric brake device that energizes the electric motor in a direction in which the braking force by the braking force load mechanism is improved. Switchable between an electric motor, a braking force load mechanism that applies a braking force to the wheels by the output of the electric motor, and a locked state that prevents the braking force slack operation of the braking force load mechanism and an allowed unlocked state An electric brake device equipped with a lock mechanism,
A temperature sensor is provided to detect the outside air temperature of the vehicle or the temperature of the electric brake device,
When the braking force load mechanism applies a braking force and the lock mechanism is in a locked state, when the temperature sensor detects the temperature immediately before freezing of the set electric brake device, the electric motor is started to be energized. Providing anti-freezing energizing means to control,
The anti-freezing energization means is an electric brake device that energizes the electric motor in a direction in which the braking force by the braking force load mechanism is reduced.   4. The freeze prevention energizing means according to claim 1, wherein the anti-freezing energizing means repeatedly energizes and interrupts the electric motor at regular intervals while the temperature sensor detects the set temperature. Electric brake device.   5. The method according to claim 1, further comprising a reduction mechanism that decelerates the rotation of the electric motor, wherein the braking force load mechanism converts the rotational movement output by the reduction mechanism into a linear movement. An electric brake device that applies braking force to the wheels. Switchable between an electric motor, a braking force load mechanism that applies a braking force to the wheels by the output of the electric motor, and a locked state that prevents the braking force slack operation of the braking force load mechanism and an allowed unlocked state An electric brake device equipped with a lock mechanism,
A temperature sensor is provided to detect the outside air temperature of the vehicle or the temperature of the electric brake device,
When the braking force load mechanism applies a braking force and the lock mechanism is in a locked state, when the temperature sensor detects the temperature immediately before freezing of the set electric brake device, the electric motor is started to be energized. Providing anti-freezing energizing means to control,
A start operation detecting means for detecting a detection signal representing a start operation of the vehicle, wherein the anti-freezing energizing means is set by the temperature sensor when the braking force load mechanism applies the braking force and the lock mechanism is in the locked state; An electric brake device that energizes the electric motor when detecting a detection signal indicating a start operation of the vehicle by the start operation detecting means while detecting the detected temperature.   7. The electric brake device according to claim 6, wherein the start operation detecting means uses a vehicle door “open” as a detection signal.   8. The electric brake device according to claim 6, wherein the start operation detecting means uses a vehicle door lock release as a detection signal.   9. The electric brake device according to any one of claims 6 to 8, wherein the start operation detecting means uses a vehicle ignition "on" as a detection signal.   10. The electric brake device according to claim 6, wherein the start operation detecting means includes a sensor that detects that the driver is seated on a driver's seat side seat of the vehicle.   The electric brake device according to any one of claims 6 to 10, wherein the start operation detecting means uses a pedal operation for applying a braking force to a wheel as a detection signal.   An automobile comprising the electric brake device according to any one of claims 1 to 11.

Images