WO2024070640A1 - アクチュエータ - Google Patents
アクチュエータ Download PDFInfo
- Publication number
- WO2024070640A1 WO2024070640A1 PCT/JP2023/033057 JP2023033057W WO2024070640A1 WO 2024070640 A1 WO2024070640 A1 WO 2024070640A1 JP 2023033057 W JP2023033057 W JP 2023033057W WO 2024070640 A1 WO2024070640 A1 WO 2024070640A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gear
- actuator
- motor
- bearing member
- intermediate shaft
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
- G05G5/03—Means for enhancing the operator's awareness of arrival of the controlling member at a command or datum position; Providing feel, e.g. means for creating a counterforce
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K26/00—Arrangement or mounting of propulsion-unit control devices in vehicles
- B60K26/02—Arrangement or mounting of propulsion-unit control devices in vehicles of initiating means or elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K26/00—Arrangement or mounting of propulsion-unit control devices in vehicles
- B60K26/02—Arrangement or mounting of propulsion-unit control devices in vehicles of initiating means or elements
- B60K26/021—Arrangement or mounting of propulsion-unit control devices in vehicles of initiating means or elements with means for providing feel, e.g. by changing pedal force characteristics
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
- G05G1/30—Controlling members actuated by foot
- G05G1/38—Controlling members actuated by foot comprising means to continuously detect pedal position
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
- G05G1/30—Controlling members actuated by foot
- G05G1/44—Controlling members actuated by foot pivoting
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K26/00—Arrangement or mounting of propulsion-unit control devices in vehicles
- B60K26/02—Arrangement or mounting of propulsion-unit control devices in vehicles of initiating means or elements
- B60K26/021—Arrangement or mounting of propulsion-unit control devices in vehicles of initiating means or elements with means for providing feel, e.g. by changing pedal force characteristics
- B60K2026/023—Arrangement or mounting of propulsion-unit control devices in vehicles of initiating means or elements with means for providing feel, e.g. by changing pedal force characteristics with electrical means to generate counter force or torque
-
- 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
- B60Y2400/30—Sensors
- B60Y2400/301—Sensors for position or displacement
- B60Y2400/3012—Sensors for position or displacement using Hall effect
-
- 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
- B60Y2400/40—Actuators for moving a controlled member
- B60Y2400/402—Manual actuators, i.e. input levers or linkages therefor
- B60Y2400/4026—Manual actuators, i.e. input levers or linkages therefor providing feel, e.g. with feedback force
-
- 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
- B60Y2400/40—Actuators for moving a controlled member
- B60Y2400/405—Electric motors actuators
-
- 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
- B60Y2400/40—Actuators for moving a controlled member
- B60Y2400/41—Mechanical transmissions for actuators
-
- 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
- B60Y2400/70—Gearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2410/00—Constructional features of vehicle sub-units
- B60Y2410/102—Shaft arrangements; Shaft supports, e.g. bearings
Definitions
- This disclosure relates to actuators.
- Actuators that apply a reaction force to an accelerator pedal are known.
- a reaction force is applied to the accelerator pedal against the pressure applied to the accelerator pedal based on the monitoring results of a pedal monitoring device that monitors the operation status of the accelerator pedal.
- the actuator of the present disclosure is capable of applying a reaction force to a pedal lever that can be depressed by the driver, and includes a motor, a reduction mechanism, an actuator lever, and an angle detection unit.
- the reduction mechanism has a motor gear that rotates integrally with the motor, an output gear that rotates integrally with the output shaft, and an intermediate gear provided between the motor gear and the output gear.
- the actuator lever is driven by the output shaft, and is provided so that it can abut against the pedal lever.
- the angle detection unit detects the rotation angle of the intermediate gear.
- the intermediate gear is integrally formed with a large tooth section that meshes with the motor gear side and a small tooth section that meshes with the output gear side.
- FIG. 1 is a schematic diagram showing an accelerator device according to a first embodiment
- FIG. 2 is a plan view showing the actuator according to the first embodiment
- FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2
- FIG. 4 is a plan view showing the actuator according to the first embodiment with the cover removed
- FIG. 5 is a cross-sectional view taken along line V-V of FIG.
- FIG. 6 is a schematic diagram showing a state in which the accelerator device according to the first embodiment is mounted on a vehicle
- FIG. 7 is a schematic diagram illustrating a moment acting on a bearing of an output shaft in the first embodiment
- FIG. 1 is a schematic diagram showing an accelerator device according to a first embodiment
- FIG. 2 is a plan view showing the actuator according to the first embodiment
- FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2
- FIG. 4 is a plan view showing the actuator according to the first embodiment with the cover removed
- FIG. 5 is a cross-
- FIG. 8 is a schematic diagram illustrating a moment acting on a bearing of an intermediate shaft in the first embodiment
- FIG. 9 is a schematic diagram illustrating an external force acting on an intermediate shaft according to the first embodiment
- FIG. 10 is a cross-sectional view showing an actuator according to a second embodiment
- FIG. 11 is a schematic diagram illustrating an external force acting on an intermediate shaft according to a second embodiment
- FIG. 12 is a cross-sectional view showing an actuator according to a third embodiment
- FIG. 13 is a cross-sectional view showing an actuator according to a fourth embodiment
- FIG. 14A is a schematic diagram showing a bearing of an intermediate shaft according to a reference example
- FIG. 14B is a schematic diagram illustrating an external force acting on an intermediate shaft according to a reference example.
- FIG. 1 An actuator according to a first embodiment is shown in Figures 1 to 9. As shown in Figure 1, an actuator 30 is applied to an accelerator device 1.
- the accelerator device 1 includes a pedal lever 20, the actuator 30, an actuator controller 80, and the like.
- the pedal lever 20 has a pad 21, an arm 23, a pedal 25, etc., and is driven as a unit by the driver's depressing operation, etc.
- the pad 21 is provided so that it can be depressed by the driver.
- the pad 21 is rotatably supported by a fulcrum member 22 provided on the housing H.
- a so-called floor-standing type (organ type) in which the pad 21 is provided extending in a direction along one side of the housing H is shown, but a hanging type (pendant type) is also possible.
- the parts of the housing that are not driven by the drive of the motor 31 or by depressing the pedal lever 20, such as the pedal housing and motor housing are collectively referred to as the "housing H.”
- the arm 23 connects the pad 21 and the pedal 25.
- One end of the pedal 25 is rotatably supported on the housing H by a fulcrum member 26, and the other end is connected to the arm 23.
- the pad 21, arm 23 and pedal 25 are driven as a unit when the driver operates the pad 21.
- a pedal opening sensor 29 that detects the pedal opening ⁇ p is provided on one end of the pedal 25.
- the pedal biasing member 27 is a compression coil spring, one end of which is fixed to the pedal 25 and the other end of which is fixed to the housing H, and biases the pedal 25 in the accelerator closing direction.
- the positions of the pad 21 when the accelerator is fully open and fully closed are appropriately indicated by two-dot chain lines.
- the actuator 30 has a motor 31, which is a drive source, an actuator lever 35, a reduction mechanism 40, a housing 60, and a cover 65.
- the motor 31 is, for example, a DC motor with brushes.
- the driving force of the motor 31 is transmitted to the pedal lever 20 via the reduction mechanism 40 and the actuator lever 35. Details of the reduction mechanism 40 and the like will be described later.
- the actuator lever 35 abuts against the pedal lever 20 at the tip 351.
- the actuator lever 35 abuts against the pad 21, but it may be configured to abut against the arm 23 or the pedal 25.
- the tip 351 is formed in a spherical shape.
- the actuator lever 35 is biased in a reaction force application direction by an actuator lever biasing member 36.
- the actuator lever biasing member 36 is, for example, a compression coil spring, and the spring force is set so that the actuator lever 35 is always in contact with the pedal lever 20.
- the actuator controller 80 has a drive circuit 81 and a control unit 85.
- the drive circuit 81 is configured, for example, with an H-bridge circuit, and has a switching element (not shown) for switching the current supply to the motor 31.
- the control unit 85 is mainly composed of a microcomputer and includes a CPU, ROM, RAM, I/O, and bus lines connecting these components (none of which are shown in the figure). Each process in the control unit 85 may be software processing in which the CPU executes a program pre-stored in a physical memory device such as a ROM (i.e., a readable non-transitory tangible recording medium), or it may be hardware processing using dedicated electronic circuits.
- a ROM i.e., a readable non-transitory tangible recording medium
- the control unit 85 has a driving force calculation unit 86 as a functional block.
- the driving force calculation unit 86 calculates a target torque T * so that a reaction force corresponding to a target reaction force F * obtained from a higher-level ECU (not shown) is output.
- the control unit 85 controls the drive of the motor 31 by controlling the drive circuit 81 with a duty corresponding to the target torque T * .
- the driving force calculation unit 86 calculates the target torque T * by using the actuator angle ⁇ a based on the detection value of the actuator sensor 70.
- the pedal opening ⁇ p based on the detection value of the pedal opening sensor 29 may be used instead of the actuator angle ⁇ a.
- the pedal opening ⁇ p may be obtained directly from the pedal opening sensor 29, or may be obtained from a higher-level ECU via communication or the like.
- the control unit 85 learns the detection value of the actuator sensor 70 when the pedal lever 20 is fully closed as a reference position, and can convert the actuator angle ⁇ a to the pedal opening ⁇ p by converting using the gear ratio, lever length ratio, etc.
- a starter switch such as an ignition switch
- the pedal lever 20 is considered to be fully closed, and the detection value of the actuator sensor 70 at this time is learned as the reference position.
- calibration may be performed by comparing the detection value of the pedal opening sensor 29 with the detection value of the actuator sensor 70, for example, while driving.
- the motor torque is corrected using the actuator angle ⁇ a so that the reaction force Foff applied at the reaction force off point Poff becomes the target reaction force F * regardless of the pedal opening degree ⁇ p. This makes it possible to appropriately control the applied reaction force.
- the motor 31 is housed in the housing 60 and a flange 63 is provided. Holes 631 are formed in the flange 63, and the housing 60 is attached to the vehicle body B (see Figure 6) by bolts (not shown) that are inserted into the holes 631.
- a connector 66 is provided on the cover 65, and is fixed to the housing 60 by bolts 68.
- the reduction gear mechanism 40 has a motor gear 41, an intermediate gear 45, and an output gear 50, and is housed in the space formed by the housing 60 and the cover 65. There is play between the members that make up the reduction gear mechanism 40, and hereinafter, the play between the members will be referred to as "backlash" as appropriate.
- the motor gear 41 is arranged so that it can rotate integrally with the motor shaft 311.
- the intermediate gear 45 has a large tooth portion 451 and a small tooth portion 453, and is integrally formed, for example, from resin.
- the large tooth portion 451 is formed with a larger diameter than the motor gear 41 and the small tooth portion 453, and meshes with the motor gear 41.
- the small tooth portion 453 is provided on the opposite side of the large tooth portion 451 from the cover 65, and meshes with the output gear 50.
- the intermediate shaft 47 is insert molded into the intermediate gear 45, and the other end protrudes from the small tooth portion 453.
- the intermediate shaft 47 is rotatably supported on the housing 60 by a bearing member 48 on the side opposite the cover 65. This allows the intermediate gear 45 to be rotatably supported on the housing 60.
- the bearing member 48 is two ball bearings 481, 482, and is housed in a bearing housing portion 61 formed in the housing 60. There may be three or more ball bearings.
- the output gear 50 has a gear portion 501 that meshes with the small tooth portion 453 of the intermediate gear 45, and a shaft portion 502, and is formed integrally from, for example, metal.
- One end of the output shaft 55 is pressed into the shaft portion 502 at two flats.
- the other end of the output shaft 55 is provided so as to protrude from the housing 60, and the actuator lever 35 is pressed into the shaft portion 502 at two flats.
- the output shaft 55 is rotatably supported in the housing 60 by a bearing member 56.
- the bearing member 56 is two ball bearings, and is accommodated in a bearing accommodating portion 62 formed in the housing 60.
- a torsion spring 58 is provided radially outside the bearing housing 62. One end of the torsion spring 58 is fixed to the housing 60, and the other end is fixed to the output gear 50. As a result, by biasing the output gear 50, the backlash between the intermediate gear 45 and the output gear 50 can be eliminated when a load is output, and the rotation angle of the output shaft 55 can be calculated from the rotation angle of the intermediate gear 45.
- the actuator sensor 70 has a sensor unit 71, a magnet 72, and a magnetic yoke 73.
- the sensor unit 71 is, for example, a Hall IC, and is held by a protrusion 651 that protrudes from the cover 65, and is positioned radially inside the magnetic yoke 73 so as to be able to detect the magnetic flux of the magnetic circuit formed by the magnet 72 and the magnetic yoke 73. This allows the sensor unit 71 to detect the rotation of the intermediate gear 45.
- the magnet 72 and magnetic yoke 73 are fixed to a magnetic circuit housing 455 formed in the intermediate gear 45 and rotate integrally with the intermediate gear 45.
- the magnetic yoke 73 is formed in a roughly annular shape and holds the magnet 72 at a predetermined interval (e.g., 180°).
- the actuator sensor 70 is configured to detect the rotation of the intermediate gear 45. This allows the area around the output shaft 55 to be made smaller than when it is configured to detect the rotation of the output gear 50. As shown in Figure 6, by making the area around the output shaft smaller, interference with the range of movement of the driver's toe Ft, indicated by the two-dot chain line Lf, can be avoided, improving mountability. Note that in Figure 6, the actuator 30 is shown with the cover 65 removed.
- the output shaft 55 has a relatively small operating angle of about 30° to 50°.
- the intermediate shaft 47 has a wider operating angle than the output shaft 55, so its rotational position can be detected with relatively high accuracy.
- the gear ratio is set so that the rotational angle of the intermediate shaft 47 is less than 360°.
- the output shaft 55 is journaled between the output gear 50 and the actuator lever 35. Therefore, the moment Mout due to the external gear force on the output shaft 55 is given by equation (1).
- the moment due to the force F3 applied from the small tooth portion 453 of the intermediate gear 45 and the moment due to the force F4 applied from the actuator lever 35 are in the same direction (clockwise on the page) relative to the journal, so the moment Mout becomes larger and the amount of deformation of the end becomes larger.
- the motor gear 41 side of the axis of the small tooth portion 453 is omitted.
- the actuator sensor 70 is disposed on the intermediate gear 45, and the intermediate shaft 47 is supported on the side opposite the actuator sensor 70. From the cover 65 side, the actuator sensor 70, the large tooth portion 451, the small tooth portion 453, and the bearing member 48 are arranged in this order.
- the moment Mmid due to the external gear force on the intermediate shaft 47 is expressed by equation (2).
- the moment due to the force F1 applied from the motor gear 41 and the moment due to the force F2 applied from the output gear 50 are in opposite directions relative to the bearing, so the moment Mmid is smaller and the deformation of the end is smaller.
- the intermediate shaft 47 has a smaller external force in the shaft tilt direction compared to the output shaft 55, and is therefore advantageous in terms of detection accuracy.
- Mout F3 x L3 + F4 x L4 ...
- Mmid -F1 x L1 + F2 x L2 ...
- L1 is the distance between the bearing member 48 and the meshing position between the motor gear 41 and the large tooth portion 451
- L2 is the distance between the bearing member 48 and the meshing position between the small tooth portion 453 and the output gear 50
- L3 is the distance between the bearing member 56 and the meshing position between the small tooth portion 453 and the output gear 50
- L4 is the distance between the engagement point between the actuator lever 35 and the output shaft 55 and the bearing member 56.
- the intermediate shaft 47 is rotatably supported by the housing 60 in a so-called “cantilever” state by the bearing member 48.
- the intermediate shaft 47 tilts (arrow Fi) even if the internal gap is negative, as shown by arrow Fe in FIG. 14B.
- the actuator sensor 70 is provided on the intermediate gear 45, the detection accuracy deteriorates when the intermediate shaft 47 tilts.
- the bearing member 48 is made up of two ball bearings 481, 482, and the intermediate shaft 47, which has an inner ring, is press-fitted tightly against the outer ring provided in the housing 60 while pressing the balls, thereby making the internal gap between the ball bearings 481, 482 zero or less.
- This makes it possible to suppress the inclination of the intermediate shaft 47 due to the external force of the gear, as shown by the arrow Fb in FIG. 9.
- the external force applied to the intermediate shaft 47 is smaller before deceleration, which is advantageous.
- the actuator 30 of this embodiment is capable of applying a reaction force to the pedal lever 20 that can be depressed by the driver, and includes a motor 31, a speed reduction mechanism 40, an actuator lever 35, and an actuator sensor 70.
- the speed reduction mechanism 40 has a motor gear 41 that rotates integrally with the motor 31, an output gear 50 that rotates integrally with the output shaft 55, and an intermediate gear 45 provided between the motor gear 41 and the output gear 50.
- the actuator lever 35 is driven by the output shaft 55 and is arranged to be able to abut against the pedal lever 20.
- the actuator sensor 70 which serves as an angle detection unit, detects the actuator angle ⁇ a, which is the rotation angle of the intermediate gear 45.
- the intermediate gear 45 is integrally formed with a large tooth portion 451 that meshes with the motor gear 41 side and a small tooth portion 453 that meshes with the output gear 50 side.
- the actuator angle ⁇ a in the drive control calculation, the drive of the actuator 30 can be appropriately controlled.
- output control and fault diagnosis according to the actuator angle ⁇ a can be performed.
- the applied reaction force can be precisely controlled.
- integrally forming the large tooth portion 451 and the small tooth portion 453 load can be transmitted without any backlash between the gears, improving responsiveness.
- the intermediate gear 45 is rotatably supported by a bearing member 48. This makes it possible to suppress vibration of the intermediate gear 45 caused by backlash in the reduction mechanism 40, and improves the detection accuracy of the actuator sensor 70.
- the actuator sensor 70, the large tooth portion 451, the small tooth portion 453, and the bearing member 48 are arranged in this order from one side.
- the moment due to an external force applied to the large tooth portion 451 and the moment due to an external force applied to the small tooth portion 453 are opposed to each other, so that it is possible to suppress the movement of the intermediate shaft 47, and therefore it is possible to further improve the detection accuracy of the actuator sensor 70.
- the intermediate gear 45 in a so-called "cantilever" state, it contributes to the miniaturization of the actuator 30 compared to when bearings are provided in two or more places.
- the intermediate gear 45 is arranged so as to be rotatable together with the intermediate shaft 47.
- the intermediate shaft 47 is rotatably supported in the housing 60 by a plurality of ball bearings 481, 482, which are the bearing member 48.
- the bearing member 48 supports the intermediate shaft 47 with an internal gap of 0 or less. This makes it possible to suppress the inclination of the intermediate shaft 47 and the durability fluctuation of the backlash of the reduction mechanism 40, thereby further improving the detection accuracy of the actuator sensor 70. In addition, it is possible to suppress torque fluctuations and operation noise when operating the pedal.
- FIG. 10 The second embodiment is shown in Figures 10 and 11.
- the second to fourth embodiments are different from the above-mentioned embodiments in the bearing structure of the intermediate shaft, and this point will be mainly described.
- Figures 10, 12, and 13 are cross-sectional views corresponding to Figure 5 of the first embodiment.
- the bearing member 91 of this embodiment is composed of a needle bearing.
- a C-ring 92 that receives a load in the thrust direction is provided on the opposite side of the bearing member 91 from the intermediate gear 45.
- bearing member 91 is configured as a needle bearing and the internal gap is set to 0, tilt caused by external gear forces can be suppressed, just as in the case where it is configured with two ball bearings.
- the intermediate shaft 47 is rotatably supported in the housing 60 by a needle bearing, which is the bearing member 91.
- a needle bearing which is the bearing member 91.
- the bearing member 91 is configured as a needle bearing, it can be used with zero internal clearance, so as in the case of using a ball bearing, it is possible to suppress the inclination of the intermediate shaft 47 and the durability fluctuation of the backlash of the reduction mechanism 40. This makes it possible to further improve the detection accuracy of the actuator sensor 70. It also provides the same effects as the above embodiment.
- one end of an intermediate shaft 49 is press-fitted into a housing 60, and the other end protrudes from the housing 60.
- An intermediate gear 45 is provided on the radially outer side of the other end of the intermediate shaft 49.
- a bearing member 95 is provided on the radially inner side of the intermediate gear 45, between the intermediate gear 45 and the intermediate shaft 49, and holds the intermediate gear 45 rotatable relative to the intermediate shaft 49.
- the bearing member 95 may be a ball bearing or a needle bearing.
- the bearing member 95 is provided between the intermediate shaft 49 fixed to the housing 60 and the intermediate gear 45, and supports the intermediate gear 45 so that it can rotate relative to the intermediate shaft 49. This configuration also provides the same effects as the above embodiment.
- the actuator lever is constantly in contact with the pedal lever by the elastic member.
- the actuator lever and the pedal lever may be driven as a unit using something other than an elastic member, or the elastic member may be omitted.
- a locking mechanism using a plunger mechanism or the like may be added to the intermediate gear.
- the accelerator device can be used as a footrest, for example, during autonomous driving.
- the reduction mechanism is made up of three gears: a motor gear, an intermediate gear, and an output gear, and has two reduction stages.
- the number of reduction stages may be three or more.
- the large tooth portion and the small tooth portion of the intermediate gear may be separate.
- the drive source is a brushed DC motor.
- a motor other than a brushed DC motor may be used as the drive source.
- the configuration of the power transmission mechanism and the arrangement of parts may be different from those in the above embodiment.
- the angle detection unit may be a resolver, an encoder, or another unit different from those in the above embodiment.
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- Automation & Control Theory (AREA)
- Transportation (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
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- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
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Abstract
Description
第1実施形態によるアクチュエータを図1~図9に示す。図1に示すように、アクチュエータ30は、アクセル装置1に適用される。アクセル装置1は、ペダルレバー20、アクチュエータ30、および、アクチュエータコントローラ80等を備える。
Mmid=-F1×L1+F2×L2 ・・・(2)
第2実施形態を図10および図11に示す。第2実施形態~第4実施形態は、中間軸の軸受構造が上記実施形態と異なるため、この点を中心に説明する。図10、図12および図13は、第1実施形態の図5に対応する断面図である。
図12に示すように、第3実施形態では、中間軸49は、一端がハウジング60に圧入固定されており、他端がハウジング60から突出している。中間軸49の他端側の径方向外側には中間ギア45が設けられる。軸受部材95は、中間ギア45の径方向内側であって、中間ギア45と中間軸49との間に設けられており、中間ギア45を中間軸49に対して相対回転可能に保持している。軸受部材95は、ボールベアリングであってもニードルベアリングであってもよい。
図13に示すように、第4実施形態では、第3実施形態と同様、中間軸49は、一端側がハウジング60に圧入固定されており、他端側がハウジング60から突出している。中間軸49の他端側の径方向外側には、中間ギア45が回転可能に保持されている。本実施形態では、軸受部材が別途に設けられていない。このように構成しても上記実施形態と同様の効果を奏する。
上記実施形態では、アクチュエータレバーは、弾性部材によりペダルレバーに常時当接している。他の実施形態では、弾性部材以外を用いて、アクチュエータレバーとペダルレバーとが一体となって駆動されるようにしてもよいし、弾性部材を省略してもよい。
Claims (8)
- 運転者が踏み込み可能なペダルレバー(20)に反力を付与可能なアクチュエータであって、
モータ(31)と、
前記モータと一体に回転するモータギア(41)、出力軸(55)と一体に回転する出力ギア(50)、および、前記モータギアと前記出力ギアとの間に設けられる中間ギア(45)を有する減速機構(40)と、
前記出力軸により駆動され、前記ペダルレバーに当接可能に設けられているアクチュエータレバー(35)と、
前記中間ギアの回転角を検出する角度検出部(70)と、
を備え、
前記中間ギアは、前記モータギア側に噛み合う大歯部(451)と、前記出力ギア側に噛み合う小歯部(453)とが一体に形成されているアクチュエータ。 - 前記中間ギアは、軸受部材(48、91、95)により回転可能に支持されている請求項1に記載のアクチュエータ。
- 前記中間ギアの軸方向において、一方側から、前記角度検出部、前記大歯部、前記小歯部、前記軸受部材の順に配置されている請求項2に記載のアクチュエータ。
- 前記中間ギアは、中間軸(47)と一体回転可能に設けられており、
前記中間軸は、前記軸受部材(48)である複数のボールベアリング(481、482)によりハウジング(60)に回転可能に支持されている請求項2または3に記載のアクチュエータ。 - 前記軸受部材は、内部隙間が0以下の状態で前記中間軸を支持している請求項4に記載のアクチュエータ。
- 前記中間ギアは、中間軸(47)と一体回転可能に設けられており、
前記中間軸は、前記軸受部材(91)であるニードルベアリングによりハウジング(60)に回転可能に支持されている請求項2または3に記載のアクチュエータ。 - 前記軸受部材は、内部隙間が0の状態で前記中間軸を支持している請求項6に記載のアクチュエータ。
- 前記軸受部材(95)は、ハウジング(60)に固定される中間軸(49)と前記中間ギアとの間に設けられており、前記中間ギアを前記中間軸に対して回転可能に支持している請求項2に記載のアクチュエータ。
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| CN202380060673.3A CN119768297A (zh) | 2022-09-30 | 2023-09-11 | 促动器 |
| DE112023004128.8T DE112023004128T5 (de) | 2022-09-30 | 2023-09-11 | Aktuator |
| US19/028,281 US20250153566A1 (en) | 2022-09-30 | 2025-01-17 | Actuator |
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| JP2022159083A JP7729301B2 (ja) | 2022-09-30 | 2022-09-30 | アクチュエータ |
| JP2022-159083 | 2022-09-30 |
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| PCT/JP2023/033057 Ceased WO2024070640A1 (ja) | 2022-09-30 | 2023-09-11 | アクチュエータ |
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| Country | Link |
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| US (1) | US20250153566A1 (ja) |
| JP (1) | JP7729301B2 (ja) |
| CN (1) | CN119768297A (ja) |
| DE (1) | DE112023004128T5 (ja) |
| WO (1) | WO2024070640A1 (ja) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1179060A (ja) * | 1997-09-08 | 1999-03-23 | Mitsubishi Heavy Ind Ltd | 電動アシスト自転車の駆動ユニット |
| JP2011251667A (ja) * | 2010-06-04 | 2011-12-15 | Mikuni Corp | アクセルペダル装置 |
| JP2014231234A (ja) * | 2013-05-28 | 2014-12-11 | パナソニック株式会社 | 電動アシスト自転車 |
| WO2016158528A1 (ja) * | 2015-04-02 | 2016-10-06 | 株式会社ミツバ | 反力発生装置 |
| JP6038768B2 (ja) * | 2013-12-18 | 2016-12-07 | 株式会社ミツバ | アクチュエータ |
| WO2019017041A1 (ja) * | 2017-07-20 | 2019-01-24 | 株式会社ミツバ | 急発進防止装置 |
| JP2020063783A (ja) * | 2018-10-17 | 2020-04-23 | プラトー株式会社 | 車両用の減速機付きモータ |
-
2022
- 2022-09-30 JP JP2022159083A patent/JP7729301B2/ja active Active
-
2023
- 2023-09-11 WO PCT/JP2023/033057 patent/WO2024070640A1/ja not_active Ceased
- 2023-09-11 CN CN202380060673.3A patent/CN119768297A/zh active Pending
- 2023-09-11 DE DE112023004128.8T patent/DE112023004128T5/de active Pending
-
2025
- 2025-01-17 US US19/028,281 patent/US20250153566A1/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1179060A (ja) * | 1997-09-08 | 1999-03-23 | Mitsubishi Heavy Ind Ltd | 電動アシスト自転車の駆動ユニット |
| JP2011251667A (ja) * | 2010-06-04 | 2011-12-15 | Mikuni Corp | アクセルペダル装置 |
| JP2014231234A (ja) * | 2013-05-28 | 2014-12-11 | パナソニック株式会社 | 電動アシスト自転車 |
| JP6038768B2 (ja) * | 2013-12-18 | 2016-12-07 | 株式会社ミツバ | アクチュエータ |
| WO2016158528A1 (ja) * | 2015-04-02 | 2016-10-06 | 株式会社ミツバ | 反力発生装置 |
| WO2019017041A1 (ja) * | 2017-07-20 | 2019-01-24 | 株式会社ミツバ | 急発進防止装置 |
| JP2020063783A (ja) * | 2018-10-17 | 2020-04-23 | プラトー株式会社 | 車両用の減速機付きモータ |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2024052396A (ja) | 2024-04-11 |
| CN119768297A (zh) | 2025-04-04 |
| US20250153566A1 (en) | 2025-05-15 |
| JP7729301B2 (ja) | 2025-08-26 |
| DE112023004128T5 (de) | 2025-07-31 |
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