WO2013171876A1 - エンジン始動装置 - Google Patents
エンジン始動装置 Download PDFInfo
- Publication number
- WO2013171876A1 WO2013171876A1 PCT/JP2012/062626 JP2012062626W WO2013171876A1 WO 2013171876 A1 WO2013171876 A1 WO 2013171876A1 JP 2012062626 W JP2012062626 W JP 2012062626W WO 2013171876 A1 WO2013171876 A1 WO 2013171876A1
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- WO
- WIPO (PCT)
- Prior art keywords
- moving body
- motor
- output shaft
- helical spline
- notch
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/087—Details of the switching means in starting circuits, e.g. relays or electronic switches
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
- F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
- F02N15/062—Starter drives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
- F02N15/043—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the gearing including a speed reducer
- F02N15/046—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the gearing including a speed reducer of the planetary type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
- F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
- F02N15/067—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement the starter comprising an electro-magnetically actuated lever
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/087—Details of the switching means in starting circuits, e.g. relays or electronic switches
- F02N2011/0874—Details of the switching means in starting circuits, e.g. relays or electronic switches characterised by said switch being an electronic switch
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
- F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
- F02N2015/061—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement said axial displacement being limited, e.g. by using a stopper
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/02—Non-polarised relays
- H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
- H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
- H01H51/065—Relays having a pair of normally open contacts rigidly fixed to a magnetic core movable along the axis of a solenoid, e.g. relays for starting automobiles
Definitions
- This invention relates to an engine starter for starting the engine by transmitting the rotational force of the motor from the moving body to the ring gear of the engine.
- Patent Document 1 an engine starter having an electromagnetic switch capable of independently operating an on / off function of a motor energization circuit and a function of popping a moving body has been proposed.
- Patent Document 2 there is an electromagnetic switch described in Patent Document 1 that uses the electromagnetic switch to synchronize the rotational speed of the moving body with the rotational speed of the ring gear, and then causes the moving body to pop out and mesh with the ring gear.
- Patent Document 2 an electromagnetic switch described in Patent Document 1 that uses the electromagnetic switch to synchronize the rotational speed of the moving body with the rotational speed of the ring gear, and then causes the moving body to pop out and mesh with the ring gear.
- the rotational force of the motor is transmitted from the output shaft to the moving body through helical spline coupling, the rotational force is also applied in the axial direction due to the lead angle that is the inclination of the helical spline gear and the inertia of the moving body. May pop out and come into contact with the ring gear.
- FIG. 3 explains the problems of a conventional engine starter having an electromagnetic switch capable of independently operating the motor energization circuit on and off and the function of popping out the moving body.
- FIG. 3A shows when the motor is stationary, and FIG. 3B shows when the motor is rotating.
- the output shaft is rotated by the rotational energy from the motor.
- the rotational energy of the output shaft is transmitted to the moving body by the coupling of the output shaft and the helical splines 37 and 38 of the moving body.
- the output shaft rotates in the direction of the arrow X due to the inclination of the helical spline coupling and the inertia of the moving body, the output shaft moves.
- the body jumps out in the axial direction (arrow Y direction). 3, when FIG. 3 is rotated 90 ° clockwise, the direction is the same as in FIGS. 1 and 2 described later.
- the upward direction (arrow Y direction) is In the ring gear direction.
- the helical spline coupling part originally set by the circular diameter is represented by a plan view, and the meshing of each gear is shown.
- the present invention has been made to solve such problems. Even if the motor energization circuit is operated earlier than the moving body push-out function without increasing the size of the electromagnetic switch, the rotational force of the motor and the output It is an object of the present invention to provide an engine starter that can prevent the moving body from protruding in the axial direction due to the shaft and the lead angle of the helical spline coupling portion of the moving body.
- An engine starter includes a motor that generates torque when electric power is supplied, an output shaft formed with a helical spline that transmits the torque of the motor, and a helical spline that engages with the output shaft.
- a moving body that transmits the torque of the motor to the engine side, a motor operating plunger that is magnetized by energizing the motor operating solenoid coil, and a function that switches on and off the power supply to the motor by moving the motor operating plunger; By energizing the moving body operating solenoid coil, the moving body operating plunger is magnetized, and the moving body moving plunger moves the moving body to the ring gear side independently through the pushing mechanism.
- An engine starter comprising an electromagnetic switch having a mechanism, A notch is formed in the power transmission side tooth surface of at least one of the shaft and the moving body, and when the engine starter is stationary, the notch is the moving body (or the output shaft).
- the output shaft and the helical spline of the moving body are arranged so as to mesh with a part of the helical spline.
- the angle of the notch portion with respect to the motor axis direction is made smaller than the lead angle of the helical spline portion.
- the engine starting device of the present invention even if the motor energization circuit is operated earlier than the moving body push-out function, the moving body does not jump out, the proof strength of the moving body and the ring gear is improved, and at the same time, noise caused by the collision is eliminated.
- the effect of silence can be expected.
- structural changes are small with respect to the existing shape, and the appearance of the engine starter does not change, so an engine starter with excellent layout can be obtained.
- FIG. 3 is a schematic configuration diagram of an engine starter according to Embodiments 1 to 3 of the present invention.
- FIG. 5 is a schematic view of a helical spline coupling mechanism portion in the first to third embodiments of the present invention. It is detail drawing explaining the problem of the jumping out of the moving body at the time of the motor rotation start in the conventional apparatus which is the background of this invention. It is an arrangement diagram of the output shaft and the helical spline of the moving body in the first embodiment and the second embodiment of the present invention.
- FIG. 3 is a meshing sectional view of a notch portion of an output shaft and a power transmission side tooth surface of a moving body in the first embodiment of the present invention.
- FIG. 4 is a detailed view of a lead angle of a notch portion of an output shaft and a power transmission side tooth surface in Embodiment 1 of the present invention.
- FIG. 4 is a detailed gear diagram of a notch portion of the output shaft and a power transmission side tooth surface in the first embodiment of the present invention. It is detail drawing of the lead angle of the notch part of a moving body, and the power transmission side tooth surface in Embodiment 2 of this invention. It is a gear detail drawing of the notch part of an output shaft and the power transmission side tooth surface in Embodiment 2 of this invention.
- FIG. 1 is a schematic configuration diagram of an engine starter according to Embodiment 1 of the present invention.
- the engine starter 1 is helically spline-coupled with a motor 2 that generates torque when electric power is supplied, and an output shaft 5 that transmits torque from the motor 2, and meshes with a ring gear 36 to generate torque of the motor 2.
- a movable body 3 to be transmitted to the engine side and a stopper 7 for restricting the movable body 3 from projecting in the direction of the ring gear 36 are provided.
- the motor 2 includes an armature 9 serving as a rotating body, a yoke 11 having a permanent magnet 10 on the inner peripheral side, and a brush 12.
- the amateur 9 includes a core 9a, an armature coil 9b, a motor shaft 9c, and a commutator 9d.
- the armature coil 9b When current flows through the armature coil 9b, the current, the magnetic flux generated by the core 9a, and the permanent magnet 10 rotate. Is produced.
- it is a well-known DC electric motor which keeps the rotating direction by the commutator 9d and the brush 12.
- the motor shaft 9c is rotatably supported by the bearing 15 press-fitted into the cover 13 fitted to the yoke 11, the output shaft 5, and a gear (not shown) provided on the motor shaft 9C, and a planetary gear. 16.
- a reduction mechanism is configured by meshing with the internal gear 4 of the internal gear.
- the electromagnetic switch 35 includes a moving body pushing mechanism and a motor energization circuit.
- the moving body pushing mechanism magnetizes the moving body operation plunger 32 by energizing the moving body operation solenoid 29 housed in the moving body operation bobbin 30.
- the magnetized moving body operating plunger 32 is attracted toward the moving body operating core switch 28 while bending the plunger spring 39, so that the hook 34 attached to the moving body operating plunger 32 moves out.
- the moving body 3 is configured to be pushed out toward the ring gear 36 via the.
- the motor energizing circuit magnetizes the motor operating plunger 27 by energizing the motor operating solenoid 26 housed in the motor operating bobbin 25.
- the magnetized plunger 27 for motor operation is pulled toward the motor operation core switch 24 to push the rod 21 to which the movable contact 22 is attached, and is connected to the fixed B contact 18 that is always applied from the battery and the motor side.
- the fixed M contact 17 and the movable contact 22 are in contact with each other, the current from the battery flows to the motor 2 and the motor 2 rotates.
- a point spring 23 is inserted between the rod 21 and the movable contact 22 to bias the movable contact 22 in the direction of the fixed B contact 18 and the fixed M contact 17 (hereinafter simply referred to as a fixed contact).
- the pressing force is secured so that 22 does not come off from the fixed contacts 17 and 18.
- the rod 21 is pushed back by the return spring 20, and the movable contact 22 is separated from the fixed contacts 17 and 18, so that the rotation of the motor 2 is stopped.
- the moving body push-out mechanism and the motor energization circuit are housed in the case 31, and the cap switch 19 to which the fixed contact is attached is caulked with the case 31 to protect the contact portion from external dust and the like.
- the motor 2 and the electromagnetic switch 35 described above are fitted to the front bracket 6 serving as an engine-side fitting / attachment and an engine starting device ground circuit.
- a bearing 8 press-fitted into the front bracket 6 supports the output shaft 5 in a rotatable manner.
- the helical spline coupling mechanism portion of the engine starter according to Embodiment 1 will be described with reference to FIGS.
- the rear side of the power transmission side tooth surface 37a that transmits the torque of the helical spline 37 of the output shaft 5 is provided at the helical spline coupling portion that connects the output shaft 5 and the moving body 3.
- a notch 37b is formed at the end.
- the lead angle of the power transmission side tooth surface 37a is a surface that meshes with the helical spline 38 of the moving body 3 when the moving body 3 is engaged with the ring gear 36 by the push-out mechanism 33 and the rotational force of the motor 2 is transmitted to the engine.
- the cutout portion 37b newly set in the first embodiment is such that the motor operating solenoid coil 26 of the electromagnetic switch 35 is energized earlier than the moving body operating solenoid coil 29, and the motor 2 before the moving body 3 pops out. Is a surface where the helical spline 38 of the moving body 3 and a part of the helical spline 37 of the output shaft 5 come into contact with each other. (See Figure 5)
- the lead angle ⁇ b of the notch portion 37b of the output shaft 5 is set smaller than the lead angle ⁇ a of the power transmission side tooth surface 37a with respect to the axial direction ( ⁇ a> ⁇ b).
- the solenoid coil 26 for motor operation of the electromagnetic switch 35 is energized earlier than the solenoid coil 29 for moving body operation, even if the moving body 3 jumps out due to the rotational force of the motor 2 and the inertia of the moving body 3, it collides with the ring gear 36.
- the notch portion 37b of the output shaft is designed so as not to occur. That is, since the notch 37b of the output shaft 5 is set parallel to the axial direction, no force in the axial direction is exerted. Therefore, as shown in FIG. 3 will not pop out.
- the jumping distance of the moving body 3 at the start of motor rotation can be calculated as follows. It is assumed that the mass of the moving body 3 is m, the inertia is I, the angular velocity of the motor 2 is ⁇ , the angular acceleration is ⁇ , the pitch circle radius of the helical spline is r, and the time is t.
- FIG. 12A shows a graph showing the relationship of the motor speed over time of the engine starting device 1.
- the jump distance of the moving body 3 can be obtained by the following relational expression (4).
- the graph is as shown in FIG.
- the lead angle ⁇ b of the notch portion 37b of the output shaft 5 can be determined as described above, and the moving body 3 can be prevented from jumping out at the start of motor rotation.
- the position of the helical spline 37 of the output shaft 5 that wraps with the helical spline 38 of the moving body 3 is the cutout portion 37 b of the output shaft 5.
- the tooth thickness decreases as the end of the helical spline 37 of the output shaft 5 is approached, and the strength decreases. Therefore, by reducing the wrap length of the notch portion 37b of the output shaft 5 and the helical spline 38 of the moving body 3, the shaft length of the notch portion 37b of the output shaft can be reduced.
- the axis length to wrap is always the length to wrap in consideration of the tolerance of related dimensions and assembly runout.
- the torque applied to the notch 37b of the output shaft 5 is very small due to the inertia of the moving body 3 and the rotation of the motor 2, and is engaged with the ring gear 36 to transmit the rotational force of the motor 2 to the engine.
- a very high torque is applied, since it is formed by the power transmission side tooth surface 37a of the output shaft 5 which is not different from the existing shape, a decrease in the strength of the notch portion 37b of the output shaft 5 is not particularly a big problem. .
- the output shaft 5 intersects with the involute curve of the power transmission tooth surface 37a of the output shaft 5.
- the axial length of the cutout portion 37b of the output shaft 5 becomes shorter as it goes from the bottom of the tooth to the tip of the tooth. The position must be set, but by making the notch portion 37b of the output shaft 5 into an involute curve, the shaft length of the notch portion 37b of the output shaft can be made the same size at the tooth bottom and the tooth tip, The axial length of the notch 37b of the output shaft 5 can be set small.
- the notch 37b of the output shaft 5 is not an involute curve, the notch is set at an angle corresponding to the front pressure angle with respect to the front gear tip center reference of the helical spline 37 of the output shaft 5. A similar effect can be obtained.
- the lead angle ⁇ b of the cutout portion 38b of the moving body 3 is smaller than the lead angle ⁇ a of the power transmission side tooth surface 38a of the moving body with respect to the motor axial direction ( ⁇ a> ⁇ b) Set.
- a part (rear end portion) of the helical spline 37 of the output shaft 5 and the cutout portion 38b of the moving body 3 are designed to wrap, so that Similar effects can be obtained.
- the torque transmission side surface of the helical spline 37 of the output shaft 5 is an involute curve
- the torque transmission side surface formed by the notch 38b of the moving body 3 is an involute curve. Since the surface contact with the helical spline 37 of the output shaft 5 is possible, the surface pressure when torque is applied can be reduced, and the axial length of the surface of the cutout portion 38b of the moving body 3 is the same at the tooth bottom and the tooth tip. Since the dimensions can be set, the axial length of the cutout portion 38b of the movable body 3 can be set small.
- the cutout portion 38b of the moving body 3 is not an involute curve, the cutout portion is set at an angle corresponding to the front pressure angle with respect to the front gear tooth bottom center reference of the helical spline 38 of the movable body 3. A similar effect can be obtained.
- notches may be set in both the output shaft 5 and the helical splines 37 and 38 of the moving body 3.
- Embodiment 3 In the description of the first embodiment, it has been stated that as the axial length of the notch portion increases, the helical spline tooth thickness decreases and the strength decreases. However, in specifications where the notch portion is large, the tip is sharp, May occur. Therefore, in the third embodiment, as shown in FIGS. 10 and 11, the notch 38b of the moving body 3 is not transmitted to the tip of the helical spline 38 but to the rear end of the helical spline 37 of the output shaft. The axial dimension required for meshing with the side tooth surface is stopped, and the end portion has a shape in which a tooth surface 38c parallel to the power transmission side tooth surface 38a is connected to the notch 38b.
- the tip is sharp like 38d.
- the solution is the third embodiment, and as shown in FIG. 11 (b), the position of the notch 38b of the moving body is axially aligned with the rear end of the helical spline 37 of the output shaft even if the tolerance is taken into account. It will be the position to wrap. From this position, the engine side sets the lead angle of the tooth surface 38c parallel to the power transmission side tooth surface 38a. By doing so, a shape in which the tip of the notch 38b is pointed is avoided.
- the shape of the power transmission side tooth surface of the moving body may be set to the output shaft.
- the present invention is suitable as an engine starter for starting the engine by transmitting the rotational force of the motor from a moving body such as a pinion to the ring gear of the engine.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Gear Transmission (AREA)
- Valve Device For Special Equipments (AREA)
- Gears, Cams (AREA)
Abstract
Description
また、特許文献1に記載の電磁スイッチを使用して、移動体の回転速度をリングギヤの回転速度に同期させた後に移動体を飛び出させ、リングギヤと噛合わせるものがある。
(例えば、特許文献2参照)
また、モータの通電回路のオンオフ機能と、移動体を飛び出させる機能を独立して動作させることができる電磁スイッチを備えた始動装置においては、アイドルストップ直後のエンジン惰性回転中に再始動要求が発生したときに、高回転中での噛合いを可能とするために、移動体押し出し動作よりもモータ通電回路を先に動作させる場合がある。その時、モータの回転力が出力軸からヘリカルスプライン結合を通じて移動体へ伝わると、ヘリカルスプラインのギヤの傾きであるリード角と、移動体の慣性により回転の力が軸方向にも掛かるため、移動体が飛び出してリングギヤに接触する恐れがある。
移動体が飛び出す前にモータが動作する場合、モータからの回転エネルギーにより出力軸が回転する。出力軸の回転エネルギーは、出力軸と移動体のヘリカルスプライン37、38の結合により移動体へ伝えられ、ヘリカルスプライン結合の傾きと移動体の慣性により、出力軸が矢印X方向に回転すると、移動体は軸方向(矢印Y方向)へ飛び出してしまう。なお、図3において、時計回りに図3を90°回転させた時、後述の図1、図2と同じ向きとなるものであり、図3(b)において、上方向(矢印Y方向)がリングギヤ方向になる。また、本来円径で設定されているヘリカルスプライン結合部を平面図で表し、それぞれのギヤの噛合いを示している。
図1はこの発明の実施の形態1におけるエンジン始動装置の概略構成図である。
図1において、エンジン始動装置1は、電力を供給するとトルクを発生するモータ2と、モータ2からのトルクを伝える出力軸5とヘリカルスプライン結合し、リングギヤ36と噛合うことでモータ2のトルクをエンジン側に伝える移動体3と、移動体3のリングギヤ36の方向への飛び出しを規制するストッパ7を備えている。
モータ軸9cはヨーク11に嵌合されたカバー13に圧入されたベアリング15と、出力軸5に回転自在に支持されており、モータ軸9Cに備わっているギヤ(図示せず)と、遊星ギヤ16、内歯歯車のインターナルギヤ4との噛合いにより減速機構を構成している。
移動体押し出し機構は、移動体動作用ボビン30に納められた移動体動作用ソレノイド29に通電することで移動体動作用プランジャ32を磁化する。磁化された移動体動作用プランジャ32が、プランジャスプリング39を撓ませながら移動体動作用コアスイッチ28方向に引き寄せられることで、移動体動作用プランジャ32に取り付けられたフック34が、飛出し機構33を介して移動体3をリングギヤ36側へ押し出すよう構成されている。
図2、図4(a)に示されるように、出力軸5と移動体3を結ぶヘリカルスプライン結合部において、出力軸5のヘリカルスプライン37のトルクを伝える側の動力伝達側歯面37aの後端に、切り欠き部37bが形成されている。
動力伝達側歯面37aのリード角は、移動体3を押し出し機構33によりリングギヤ36に噛合わせ、エンジンにモータ2の回転力を伝える時に、移動体3のヘリカルスプライン38と噛合う面であるが、実施の形態1において新たに設定する切り欠き部37bは、電磁スイッチ35のモータ動作用ソレノイドコイル26が、移動体動作用ソレノイドコイル29よりも早く通電され、移動体3が飛び出す前にモータ2が動作した時に、移動体3のヘリカルスプライン38と、出力軸5のヘリカルスプライン37の一部が接触する面である。(図5参照)
つまり、出力軸5の切り欠き部37bを軸方向に対して平行に設定することで、軸方向への力は働かないので、前述した図3のように、モータ2の回転力だけで移動体3が飛び出すことがなくなるものである。
移動体3の質量をm、慣性をI、モータ2の角速度をω、角加速度をβ、ヘリカルスプラインのピッチ円半径をr、時間をtとする。
図12(a)にエンジン始動装置1の時間経過によるモータ回転数の関係を表したグラフを示す。角加速度βは図12(a)のグラフより以下の関係式(1)から求めることが出来る。
β = ( ω2 - ω1 )/( t2 - t1 )・・・・・(1)
F1 = I ・ β / r ・ tan( 90° - θb) - Fμ・・・・・(2)
Δ = ( F1 - F2) / m ・ t2 ・・・・・(3)
実施の形態1では出力軸5に切り欠き部37bを設定していたが、実施の形態2では、図4(b)に示すように、移動体3のヘリカルスプライン38に切り欠き部38bを設定し、図8に示すように、移動体3の切り欠き部38bのリード角θbは、移動体の動力伝達側歯面38aのリード角θaよりもモータ軸方向に対して角度を小さく(θa > θb )設定する。
またエンジン始動装置1が静止時において、出力軸5のヘリカルスプライン37の一部(後端部)と移動体3の切り欠き部38bが、ラップするように設計することで、実施の形態1と同様の効果を得ることができる。
実施の形態1の説明において、切り欠き部の軸長を長くするほどヘリカルスプラインの歯厚が小さくなり強度が低下すると述べたが、切り欠き部が大きく必要な仕様では先端が尖ってしまい、欠けが発生する可能性がある。そこでこの実施の形態3では、図10、図11に示すように、移動体3の切り欠き部38bを、ヘリカルスプライン38の先端部までではなく、出力軸のヘリカルスプライン37の後端の動力伝達側歯面との噛合いに必要な軸方向寸法に止め、端部は動力伝達側歯面38aと平行な歯面38cを切り欠き部38bと結んだ形状としたものである。
なお、移動体の動力伝達側歯面の形状は、出力軸に設定しても良い。
7 ストッパ、24 モータ動作用コアスイッチ、
26 モータ動作用ソレノイドコイル、27 モータ動作用プランジャ、
28 移動体飛び出し用コアスイッチ、
29 移動体動作用ソレノイドコイル、
32 移動体動作用プランジャ、33 押し出し機構、34 フック、
35 電磁スイッチ、36 リングギヤ、
37 出力軸のヘリカルスプライン、
37a 出力軸の動力伝達側歯面、37b 出力軸の切り欠き部、
38 移動体のヘリカルスプライン、
38a 移動体の動力伝達側歯面、
38b 移動体の切り欠き部、
38c 移動体の動力伝達側歯面と平行な歯面、
39 プランジャスプリング
Claims (5)
- 電力を供給するとトルクを発生するモータと、このモータのトルクを伝えるヘリカルスプラインが形成された出力軸と、この出力軸と係合するヘリカルスプラインを有し前記モータのトルクをエンジン側に伝える移動体と、モータ動作用ソレノイドコイルに通電することでモータ動作用プランジャを磁化し、該モータ動作用プランジャの移動により前記モータへの電力供給のオンオフを切り替える機能と、移動体動作用ソレノイドコイルに通電することで移動体動作用プランジャを磁化し、該移動体動作用プランジャの移動により押し出し機構を介して移動体をリングギヤ側へ押し出す機能とをそれぞれ独立して動作させる機構を具備した電磁スイッチとを備えたエンジン始動装置であって、前記出力軸、前記移動体の少なくともいずれか一方のヘリカルスプラインの動力伝達側歯面に、切り欠き部を形成し、エンジン始動装置が静止時において、前記切り欠き部が前記移動体(または前記出力軸)のヘリカルスプラインの一部と噛合うように、前記出力軸と前記移動体のヘリカルスプラインを配置したことを特徴とするエンジン始動装置。
- 前記切り欠き部のモータ軸方向に対する角度は、前記ヘリカルスプライン部のリード角よりも小さいことを特徴とする請求項1に記載のエンジン始動装置。
- 前記切り欠き部は、モータ軸方向に対して、出力軸のヘリカルスプライン後端、または移動体のヘリカルスプライン先端にラップしていることを特徴とする請求項2に記載のエンジン始動装置。
- 前記切り欠き部の面は、動力伝達部歯面と平行またはインボリュート曲面であることを特徴とする請求項3に記載のエンジン始動装置。
- 前記切り欠き部の面の角度は、ヘリカルスプラインの正面ギヤセンターに対して、ヘリカルスプラインの正面圧力角以上であることを特徴とする請求項4に記載のエンジン始動装置。
Priority Applications (5)
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DE112012006378.3T DE112012006378B4 (de) | 2012-05-17 | 2012-05-17 | Antriebsmaschinen-Anlassvorrichtung |
CN201280072548.6A CN104246208B (zh) | 2012-05-17 | 2012-05-17 | 发动机启动装置 |
US14/378,713 US9670892B2 (en) | 2012-05-17 | 2012-05-17 | Engine startup device |
PCT/JP2012/062626 WO2013171876A1 (ja) | 2012-05-17 | 2012-05-17 | エンジン始動装置 |
JP2014515424A JP5710071B2 (ja) | 2012-05-17 | 2012-05-17 | エンジン始動装置 |
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PCT/JP2012/062626 WO2013171876A1 (ja) | 2012-05-17 | 2012-05-17 | エンジン始動装置 |
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US (1) | US9670892B2 (ja) |
JP (1) | JP5710071B2 (ja) |
CN (1) | CN104246208B (ja) |
DE (1) | DE112012006378B4 (ja) |
WO (1) | WO2013171876A1 (ja) |
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JP2016205265A (ja) * | 2015-04-24 | 2016-12-08 | 三菱電機株式会社 | トルク伝達装置及びその製造方法 |
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- 2012-05-17 US US14/378,713 patent/US9670892B2/en active Active
- 2012-05-17 DE DE112012006378.3T patent/DE112012006378B4/de not_active Expired - Fee Related
- 2012-05-17 JP JP2014515424A patent/JP5710071B2/ja active Active
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CN104246208A (zh) | 2014-12-24 |
DE112012006378T5 (de) | 2015-01-29 |
US9670892B2 (en) | 2017-06-06 |
JP5710071B2 (ja) | 2015-04-30 |
JPWO2013171876A1 (ja) | 2016-01-07 |
US20150020761A1 (en) | 2015-01-22 |
DE112012006378B4 (de) | 2016-12-22 |
CN104246208B (zh) | 2016-08-31 |
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