WO2021181809A1 - 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
- WO2021181809A1 WO2021181809A1 PCT/JP2020/047373 JP2020047373W WO2021181809A1 WO 2021181809 A1 WO2021181809 A1 WO 2021181809A1 JP 2020047373 W JP2020047373 W JP 2020047373W WO 2021181809 A1 WO2021181809 A1 WO 2021181809A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- brake
- parking brake
- control unit
- service brake
- service
- Prior art date
Links
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 230000004044 response Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 3
- 230000003245 working effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 230000008602 contraction Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 239000012530 fluid Substances 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 6
- 230000004913 activation Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
- 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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- 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
- B60T13/745—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 a hydraulic system, e.g. a master cylinder
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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
- B60T13/746—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 and mechanical transmission of the braking action
-
- 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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
-
- 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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
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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
- F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
- F16D51/16—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis
- F16D51/18—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes
- F16D51/20—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots
- F16D51/22—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots mechanically actuated
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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
- F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
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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
- F16D65/22—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for pressing members apart, e.g. for drum 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
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
- F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
- F16D65/54—Slack adjusters mechanical self-acting in one direction for adjusting excessive play by means of direct linear adjustment
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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
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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
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/406—Test-mode; Self-diagnosis
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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
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/413—Plausibility monitoring, cross check, redundancy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/42—Clutches or 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
- F16D2066/003—Position, angle or speed
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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
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
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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
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/24—Electric or magnetic using motors
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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
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/58—Mechanical mechanisms transmitting linear movement
- F16D2125/60—Cables or chains, e.g. Bowden cables
Definitions
- the present invention relates to an electric parking brake device capable of a service brake that generates a braking force according to an operation input of a vehicle user and a parking brake that generates a braking force by the action of an electric actuator whose operation is controlled by a control unit. ..
- Such an electric parking brake device is known in Patent Document 1 and Patent Document 2, and in the one disclosed in Patent Document 1, when the rotation of the wheel is detected by the rotation sensor in the parked state of the vehicle, the vehicle It is determined that the vehicle has started to move undesirably, and the parking braking force is increased by operating the electric actuator. Further, in the case disclosed in Patent Document 2, the vehicle does not sensitively detect the shaking of the vehicle when the vehicle is parked. It accurately determines the start of movement and avoids a useless increase in parking braking force other than that start.
- the present invention has been made in view of such circumstances, and provides an electric parking brake device capable of reducing the load on the battery by preventing the control unit from being left running for an unnecessarily long time.
- the purpose is to do.
- the present invention includes a service brake that generates a braking force according to an operation input of a vehicle user, and a parking brake that generates a braking force by the action of an electric actuator whose operation is controlled by a control unit.
- the electric parking brake device is provided with a service brake detecting means connected to the control unit so as to detect whether or not the electric actuator is the service brake after the application operation of the electric actuator is completed.
- the first feature is that the count is started in response to the end of detection of the service brake by the service brake detecting means, and the operation of the control unit is stopped after the lapse of the first predetermined time from the start of the count.
- the present invention is described in response to the fact that the service brake detecting means detects that the control unit has entered the service brake in the middle of the lapse of time due to the counting.
- the second feature is that the count is reset and the recount is started, and the operation of the control unit is stopped after the lapse of the second predetermined time from the start of the recount.
- the third feature of the present invention is that, in addition to the configuration of the second feature, the first predetermined time and the second predetermined time are set to be the same.
- the service brake detecting means is a hydraulic pressure sensor that detects the brake hydraulic pressure for obtaining the braking force by the service brake. This is the fourth feature.
- the present invention can operate to obtain the braking force of the parking brake and the wheel cylinder for generating the braking force by the service brake, in addition to the configuration of the first to fourth features.
- the electric actuator connected to the brake cable so as to drive the parking brake lever is attached to the drum brake including the parking brake lever and the brake cable connected to the parking brake lever. This is the fifth feature.
- the operation of the control unit is stopped when the first set time elapses after the service brake is finished, so that the control unit remains activated for an unnecessarily long time. It is possible to prevent this from happening and reduce the load on the battery.
- the recounting is started and the operation of the control unit is stopped after the lapse of the second predetermined time. Therefore, when the vehicle user additionally receives an operation input after the service brake is completed, the parking brake force can be controlled to increase.
- the increase control of the parking braking force can be reliably additionally executed.
- the service brake detecting means is a hydraulic pressure sensor that detects the brake fluid pressure
- a special sensor can be obtained by using the hydraulic pressure sensor used in normal brake hydraulic pressure control. It is not necessary to use it, and the increase in the number of parts can be suppressed.
- the present invention can be suitably applied to a drum brake provided with an electric actuator.
- FIG. 1 is a front view of the drum brake.
- FIG. 2 is a rear view of the drum brake.
- FIG. 3 is a block diagram showing a configuration for controlling an electric actuator.
- FIG. 4 is a flowchart showing a control procedure at the time of parking braking.
- FIG. 5 is a timing chart showing an example of changes in the operating state of the electric actuator during the parking brake, the service brake, the timer, and the control unit activation continuation request signal.
- FIG. 6 is a timing chart showing other examples of changes in the operating state of the electric actuator during the parking brake, the service brake, the timer, and the control unit activation continuation request signal.
- FIGS. 1 to 6 An embodiment of the present invention will be described with reference to FIGS. 1 to 6 attached.
- a drum brake B is provided on a wheel of a four-wheeled vehicle, for example, the left rear wheel, and the drum brake B is fixed with a through hole 12 in the center for penetrating the axle 11 of the left rear wheel.
- the first and second brake shoes 15, 16 and the first and second brake shoes 15 and 16 arranged in the back plate 13 so as to be slidable with the back plate 13 and the inner circumference of the brake drum 14 rotating with the left rear wheel.
- a braking gap automatic adjusting means (so-called auto adjuster) 18 for automatically adjusting the gap and a return spring 19 provided between the first and second brake shoes 15 and 16 are provided.
- the first and second brake shoes 15 and 16 include the first and second webs 15a and 16a formed in a bow-shaped flat plate shape along the inner circumference of the brake drum 14, and their first and second brake shoes 15a and 16a.
- the first and second rims 15b and 16b are connected so as to be orthogonal to the outer periphery of the second webs 15a and 16a, and the first and second rims 15b and 16b attached to the outer periphery of the first and second rims 15b and 16b. It consists of a second lining 15c and 16c.
- an anchor plate 21 serving as a fulcrum during expansion and contraction of the first and second brake shoes 15 and 16 is provided at one end of the first and second webs 15a and 16a (this embodiment). Then, the lower end portion) is fixed so as to be rotatably supported. Further, the wheel cylinder 17 is operated by the output hydraulic pressure of a master cylinder (not shown) operated by a brake pedal to expand the first and second brake shoes 15 and 16 with the anchor plate 21 as a fulcrum. A pair of pistons 20 included in the wheel cylinder 17 are fixed to the back plate 13 between the other ends of the first and second brake shoes 15 and 16 so as to exert a driving force to the side. The outer end portion is arranged so as to face the other end portion (upper end portion in this embodiment) of the first and second webs 15a and 16a.
- a coil spring 22 is provided between the one ends of the first and second webs 15a and 16a to urge the one ends of the first and second webs 15a and 16a toward the anchor plate 21.
- a pair of return springs 19 for urging the first and second brake shoes 15 and 16 in the contraction direction are provided between the other ends of the first and second webs 15a and 16a.
- the braking gap automatic adjusting means 18 is provided between the first and second webs 15a and 16a of the first and second brake shoes 15 and 16, and is a contraction position regulating that can be extended by rotation of the adjusting gear 23. It has a strut 24 and a feed claw 25a that engages with the adjust gear 23, and can rotate to the second web 16a of the second brake shoe 16 of the first and second brake shoes 15 and 16. It is composed of an adjusting lever 25 that is supported and an adjusting spring 26 that rotates and urges the adjusting lever 25 to the side that rotates the adjusting gear 23 in a direction that extends the contraction position regulating strut 24.
- the contraction position regulating strut 24 regulates the contraction positions of the first and second brake shoes 15 and 16, and the first brake shoe 15 of the first and second brake shoes 15 and 16 is provided.
- a first rod 27 having a first engaging connecting portion 27a that engages with the other end of the first web 15a and a second web 16a provided with the second brake shoe 16 near the other end.
- a second rod 28 having a second engaging connecting portion 28a that engages with the first rod 27 and arranged coaxially with the first rod 27, and one end of the first rod 27 being inserted into the first rod 27 so as to be relatively movable in the axial direction.
- the two rods 28 have an adjusting bolt 29 whose other end is coaxially screwed, and the adjusting gear 23 is arranged between the first and second rods 27 and 28 to provide an outer circumference of the adjusting bolt 29. Is formed in.
- a first locking recess 30 for engaging the first engaging connecting portion 27a is provided on the side edge of the first web 15a near the other end and facing the axle 11 side, and the second web 16a is provided.
- a second locking recess 31 for engaging the second engaging connecting portion 28a is provided on the side edge facing the axle 11 side near the other end of the above.
- the adjusting lever 25 having a feed claw 25a that engages with the adjusting gear 23 is rotatably supported by the second web 16a via a support shaft 32, and is rotatably supported between the second web 16a and the adjusting lever 25. Is provided with the adjust spring 26. Moreover, the spring force of the adjust spring 26 is set to be smaller than the spring force of the return spring 19.
- the first and second linings 15c and 16c are worn when the first and second brake shoes 15 and 16 are extended by the operation of the wheel cylinder 17.
- the adjustment lever 25 is expanded by a certain value or more due to the above, the adjust lever 25 is rotated around the axis of the support shaft 32 by the spring force of the adjust spring 26, whereby the adjust gear 23 is rotated.
- the effective length of the contraction position regulating strut 24 is increased and corrected accordingly.
- the drum brake B includes a parking brake lever 34 capable of generating a parking brake force according to the operation, and the parking brake lever 34 is one of the first webs 15a of the first brake shoe 15.
- the brake drum 14 is arranged so as to overlap with each other in a front view (direction shown in FIG. 1) in a direction along the rotation axis of the brake drum 14, and extends long along the longitudinal direction of the first web 15a.
- An engaging piece 36 fixed to one end of the brake cable 37 is engaged with one end of the parking brake lever 34 (the lower end in this embodiment), and the other end of the parking brake lever 34 (this).
- the upper end portion is connected to the other end portion of the first web 15a in the first brake shoe 15 via a pin 35.
- the parking brake lever 34 When the parking brake of the vehicle is activated, the parking brake lever 34 is rotated and driven in the counterclockwise direction of FIG. 1 with the pin 35 as a fulcrum by the traction force input from the brake cable 37. Due to the rotation of the lever 34, a force in a direction in which the second lining 16c of the brake shoe 16 is pressed against the inner circumference of the brake drum 14 is applied to the second brake shoe 16 via the contraction position regulating strut 24. To work. Further, when the parking brake lever 34 is continuously rotated and driven in the counterclockwise direction of FIG. 1, the parking brake lever 34 engages with the first engaging connecting portion 27a of the contraction position regulating strut 24.
- the parking brake lever 34 operates at an operating position where the first and second linings 15c and 16c of the first and second brake shoes 15 and 16 are in pressure contact with the inner circumference of the brake drum 14. , The parking brake state can be obtained in this state.
- the first operation is performed by the spring force of the return spring 19 in a direction away from the inner circumference of the brake drum 14.
- the parking brake lever 34 returns to the non-operating position together with the second brake shoes 15 and 16, and the parking brake lever 34 is urged toward the non-operating position side.
- the brake cable 37 is towed by the power exerted by the electric actuator 38, and the electric actuator 38 has a screw shaft 39 connected to the brake cable 37 and the screw shaft 39.
- An actuator case 40 that supports the screw shaft 39 so as to be able to reciprocate in the axial direction while blocking its rotation, an electric motor 41 that can freely rotate in the forward and reverse directions and is housed in the actuator case 40, and the electric motor 41.
- a motion conversion mechanism (not shown) interposed between the electric motor 41 and the screw shaft 39 and housed in the actuator case 40 while making it possible to convert the generated rotary motion into the linear motion of the screw shaft 39. ) And.
- the actuator case 40 of the electric actuator 38 is attached to the back plate 13 on the opposite side of the wheel cylinder 17 via the attachment member 43.
- the mounting member 43 is fixed to the actuator case 40, and the mounting member 43 is fastened to the back plate 13 with a plurality of, for example, three bolts 44.
- the screw shaft 39 of the electric actuator 38 is connected to the brake cable 37 via a cable joint 51, and the screw shaft 39 and the connecting portion of the brake cable 37 are protected to be coupled to the actuator case 40. Covered with a cylinder 50.
- a tubular portion 13a is integrally projected from the lower portion of the back plate 13 along the vehicle front-rear direction, and the brake cable 37 is introduced into the back plate 13 from the tubular portion 13a. Further, the brake cable 37 is covered with an outer cable 45 formed by winding an iron wire rod in a coil shape between the protective cylinder 50 and the cylinder portion 13a.
- the end of the outer cable 45 on the electric actuator 38 side is attached to the protective cylinder 50 via the guide tube 52, and the end of the outer cable 45 on the back plate 13 side is the end via the guide tube 53. It is attached to the tubular portion 13a.
- a holding plate 46 sandwiching the anchor plate 21 with the back plate 13 is formed by a pair of rivets 47 together with the anchor plate 21 to form the back plate.
- a guide portion 46a that is attached to the lower portion of the 13 and guides the brake cable 37 is integrally provided on the holding plate 46 so as to have a substantially U-shaped cross-sectional shape.
- the electric power of the battery 61 is supplied to the electric motor 41 in the electric actuator 38 via the drive circuit 62, and the operation of the electric motor 41, that is, the operation of the drive circuit 62 is a control unit. It is controlled by C.
- the control unit C is connected to an instruction means 63 that detects that the vehicle user has performed an operation for obtaining a parking brake state by operating the electric actuator 38 and outputs a signal instructing the start of operation of the electric actuator 38. Will be done.
- the drum brake B generates a braking force by operating the wheel cylinder 17 in response to an operation input of the vehicle user at the time of service braking, and outputs from the master cylinder 65 when the vehicle user depresses the brake pedal 64.
- the brake fluid pressure is applied to the wheel cylinder 17, and the hydraulic pressure sensor 66 as a service brake detecting means for detecting whether or not the brake is a service brake detects the brake hydraulic pressure.
- the brake fluid pressure detected by the hydraulic pressure sensor 66 is input to the control unit C, which is interposed in the hydraulic pressure path 67 connecting the cylinder 65 and the master cylinder 65.
- step S1 it is determined whether or not the electric actuator 38 is in the operating state, and the electric actuator 38 is in the operating state.
- step S2 it is confirmed in step S3 whether or not the apply operation of the electric actuator 38 is completed, and when it is confirmed that the apply operation of the electric actuator 38 is completed, step S4 Proceed to.
- step S4 a first predetermined time is set, the brake fluid pressure detected by the hydraulic pressure sensor 66 is acquired in step S5, and in the subsequent step S6, whether or not the vehicle is in the service braking state is used as the brake fluid pressure.
- step S6 When it is determined in step S6 that the service brake state is present, the process returns from step S6 to step S4, and when it is determined that the service brake state is not present, the process proceeds from step S6 to step S7 to count the time.
- step S8 When it is determined in step S8 following the count in step S7 that the first predetermined time has elapsed, the operation of the control unit C is stopped by proceeding to step S9 and turning off the start continuation request of the control unit C.
- step S8 When it is determined in step S8 that the first predetermined time has not elapsed, the process proceeds from step S8 to step S10 to acquire the brake fluid pressure detected by the hydraulic pressure sensor 66, and in the subsequent step S11, the brake fluid is obtained. Determine if the service brake is in place based on the pressure.
- step S11 When it is determined in step S11 that the service brake state is not present, the process returns to step S7 from step S11, and when it is determined that the service brake state is present, the process proceeds from step S11 to step S12, and the count values up to that point are reset.
- step S13 a second predetermined time is set, and this second predetermined time is the same as the first predetermined time in this embodiment.
- the process proceeds to step S14 to recount the time, it is determined in step S15 whether or not the second predetermined time has elapsed, and the second predetermined time has passed. If it has not elapsed, the process returns to step S14, and when it is confirmed that the second predetermined time has elapsed, the process proceeds from step S15 to step S9.
- the control unit C starts counting according to the end of detection of the service brake by the hydraulic pressure sensor 66 after the application operation of the electric actuator 38 is completed, and is the first from the start of the counting. After a lapse of a predetermined time, the operation of the control unit C will be stopped. That is, as shown in FIG. 5, when the electric actuator 38 changes from the non-operating state to the operating completed state so as to obtain the parking brake state in the service brake state, the request to continue starting the control unit C is turned on.
- the timer starts counting when the service brake state ends at time t1, and the start continuation request of the control unit C is turned off at the time t2 when the first predetermined time elapses from the time t1, and the control unit C is turned off. Will stop its operation.
- control unit C resets the count according to the detection by the hydraulic pressure sensor 66 that the service brake has been entered in the middle of the time elapsed by the count that starts when the detection of the service brake ends.
- the recounting is started, and the operation of the control unit C is stopped after a second predetermined time has elapsed from the start of the recounting. That is, as shown in FIG. 6, when the timer starts counting when the service brake state ends at time t3 and enters the service brake state at time t4 when a time less than the first predetermined time elapses from time t3.
- the count value is reset to, and when the service brake state ends at the subsequent time t5, recounting is executed by the timer, and at the time t6 when the second predetermined time elapses, the start continuation request of the control unit C is turned off and the control is performed. Unit C will stop its operation.
- control unit C resets the count and starts recounting in response to the detection by the hydraulic pressure sensor 66 that the service brake has been entered in the middle of the lapse of time due to the counting, and the recounting is started. Since the operation of the control unit C is stopped after the second predetermined time has elapsed from the start of counting, it is possible to control the increase in the parking brake force when an additional operation input is received by the vehicle user after the service brake is completed. ..
- the first predetermined time and the second predetermined time are set to be the same, it is possible to reliably additionally execute the increase control of the parking brake force.
- hydraulic pressure sensor 66 used in normal brake hydraulic pressure control is used as the service brake detecting means, it is possible to suppress an increase in the number of parts without using a special sensor.
- the present invention can be suitably applied to the drum brake B to which the electric actuator 38 is attached.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Regulating Braking Force (AREA)
- Braking Arrangements (AREA)
Abstract
Description
34・・・パーキングブレーキレバー
37・・・ブレーキケーブル
38・・・電動アクチュエータ
66・・・サービスブレーキ検出手段である液圧センサ
B・・・ドラムブレーキ
C・・・制御ユニット
Claims (5)
- 車両ユーザーの操作入力に応じたブレーキ力を発生させるサービスブレーキと、制御ユニット(C)で作動が制御される電動アクチュエータ(38)の働きでブレーキ力を発生させるパーキングブレーキとが可能な電動パーキングブレーキ装置において、前記電動アクチュエータ(38)のアプライ作動完了後に前記サービスブレーキであるか否かを検出するようにして前記制御ユニット(C)に接続されるサービスブレーキ検出手段(66)を備え、前記制御ユニット(C)が、前記サービスブレーキ検出手段(66)による前記サービスブレーキの検出終了に応じてカウントを開始するとともにそのカウント開始から第1の所定時間の経過後に当該制御ユニット(C)の作動を停止することを特徴とする電動パーキングブレーキ装置。
- 前記制御ユニット(C)は、前記カウントによる時間経過の途中で前記サービスブレーキに入ったことが前記サービスブレーキ検出手段(66)によって検出されるのに応じて前記カウントをリセットするとともに再カウントを開始し、その再カウント開始から第2の所定時間の経過後に当該制御ユニット(C)の作動を停止することを特徴とする請求項1に記載の電動パーキングブレーキ装置。
- 前記第1の所定時間および前記第2の所定時間が同一に設定されることを特徴とする請求項2に記載の電動パーキングブレーキ装置。
- 前記サービスブレーキ検出手段が、前記サービスブレーキによるブレーキ力を得るためのブレーキ液圧を検出する液圧センサ(66)であることを特徴とする請求項1~3のいずれか1項に記載の電動パーキングブレーキ装置。
- サービスブレーキによるブレーキ力を発生させるためのホイールシリンダ(17)と、パーキングブレーキでのブレーキ力を得るように作動することを可能としたパーキングブレーキレバー(34)と、当該パーキングブレーキレバー(34)に連結されるブレーキケーブル(37)とを備えるドラムブレーキ(B)に、前記パーキングブレーキレバー(34)を駆動するようにして前記ブレーキケーブル(37)に連結される前記電動アクチュエータ(38)が付設されることを特徴とする請求項1~4のいずれか1項に記載の電動パーキングブレーキ装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/910,662 US20230150466A1 (en) | 2020-03-12 | 2020-12-18 | Electric parking brake device |
JP2022505770A JP7488883B2 (ja) | 2020-03-12 | 2020-12-18 | 電動パーキングブレーキ装置 |
EP20923792.4A EP4119811B1 (en) | 2020-03-12 | 2020-12-18 | Electric parking brake device |
CN202080098408.0A CN115279634B (zh) | 2020-03-12 | 2020-12-18 | 电动驻车制动装置 |
KR1020227031326A KR20220133302A (ko) | 2020-03-12 | 2020-12-18 | 전동 파킹 브레이크 장치 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2020-043291 | 2020-03-12 | ||
JP2020043291 | 2020-03-12 |
Publications (1)
Publication Number | Publication Date |
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WO2021181809A1 true WO2021181809A1 (ja) | 2021-09-16 |
Family
ID=77671535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2020/047373 WO2021181809A1 (ja) | 2020-03-12 | 2020-12-18 | 電動パーキングブレーキ装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20230150466A1 (ja) |
EP (1) | EP4119811B1 (ja) |
JP (1) | JP7488883B2 (ja) |
KR (1) | KR20220133302A (ja) |
CN (1) | CN115279634B (ja) |
WO (1) | WO2021181809A1 (ja) |
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JP2019171888A (ja) * | 2018-03-26 | 2019-10-10 | 株式会社アドヴィックス | 制動制御装置 |
Family Cites Families (17)
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JP3708011B2 (ja) * | 2000-09-13 | 2005-10-19 | トヨタ自動車株式会社 | 車両用ブレーキの制御装置 |
JP4618534B2 (ja) * | 2004-03-31 | 2011-01-26 | 日立オートモティブシステムズ株式会社 | 電動ブレーキ装置 |
JP2006131151A (ja) * | 2004-11-08 | 2006-05-25 | Toyota Motor Corp | 電動パーキングブレーキ装置 |
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US7524000B2 (en) * | 2006-12-04 | 2009-04-28 | The Boeing Company | Brake status indicator control for an electric brake system of a vehicle |
JP2013071521A (ja) * | 2011-09-27 | 2013-04-22 | Advics Co Ltd | 駐車ブレーキ制御装置 |
JP5737224B2 (ja) * | 2012-05-28 | 2015-06-17 | 株式会社アドヴィックス | 車両用ブレーキ装置 |
JP5894033B2 (ja) * | 2012-07-30 | 2016-03-23 | 富士重工業株式会社 | 車両の制御装置 |
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JP6227333B2 (ja) * | 2013-08-30 | 2017-11-08 | 日立オートモティブシステムズ株式会社 | ブレーキシステム |
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JP6297883B2 (ja) * | 2014-03-28 | 2018-03-20 | マツダ株式会社 | 電動ブレーキ装置 |
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KR102167194B1 (ko) * | 2014-05-28 | 2020-10-20 | 현대모비스 주식회사 | 차량용 전자식 주차 브레이크 및 그 제어방법 |
JP2016011081A (ja) * | 2014-06-30 | 2016-01-21 | 株式会社ハイレックスコーポレーション | 電動パーキングブレーキ制御装置 |
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2020
- 2020-12-18 WO PCT/JP2020/047373 patent/WO2021181809A1/ja active Application Filing
- 2020-12-18 KR KR1020227031326A patent/KR20220133302A/ko not_active Application Discontinuation
- 2020-12-18 CN CN202080098408.0A patent/CN115279634B/zh active Active
- 2020-12-18 US US17/910,662 patent/US20230150466A1/en active Pending
- 2020-12-18 JP JP2022505770A patent/JP7488883B2/ja active Active
- 2020-12-18 EP EP20923792.4A patent/EP4119811B1/en active Active
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JP2005096543A (ja) * | 2003-09-24 | 2005-04-14 | Mazda Motor Corp | 電動パーキングブレーキシステム |
JP2018009617A (ja) * | 2016-07-12 | 2018-01-18 | 日信工業株式会社 | 車両用ブレーキ装置 |
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Also Published As
Publication number | Publication date |
---|---|
CN115279634A (zh) | 2022-11-01 |
JPWO2021181809A1 (ja) | 2021-09-16 |
US20230150466A1 (en) | 2023-05-18 |
KR20220133302A (ko) | 2022-10-04 |
CN115279634B (zh) | 2024-05-10 |
JP7488883B2 (ja) | 2024-05-22 |
EP4119811A4 (en) | 2023-08-30 |
EP4119811A1 (en) | 2023-01-18 |
EP4119811B1 (en) | 2024-09-04 |
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