CN1965164B

CN1965164B - Starter motor, particularly for a motor vehicle, provided with a friction free-wheel starter

Info

Publication number: CN1965164B
Application number: CN2005800190490A
Authority: CN
Inventors: 贝努瓦·杜普克斯; 奥利维尔·吉佐尔米; 克里斯琴·莫纽克斯; 安德烈·皮雷耶; 吉勒斯·瓦丁-米肖
Original assignee: Valeo Equipements Electriques Moteur SAS
Current assignee: Valeo Equipements Electriques Moteur SAS
Priority date: 2004-06-09
Filing date: 2005-06-06
Publication date: 2010-06-16
Anticipated expiration: 2025-06-06
Also published as: CN1965164A; EP1769154A1; BRPI0511159B1; BRPI0511159B8; FR2871532B1; BRPI0511159A; MXPA06014224A; FR2871532A1; WO2006003285A1; EP1769154B1

Abstract

A starter motor including an electric motor (11) mechanically coupled to a starter (26) including a driver (33), a hitch member (45) for hitching the pinion (32) to the driver (33) via a free-wheel mechanical coupling (34) in the form of a friction clutch, and a priming spring (R1) built into the starter (26) between the hitch member (45) and the driver (33), whereby the two friction surfaces (37, 40) are spaced apart when the friction clutch is in the inoperative position, and a resisting torque is frictionally generated to enable reliable priming of the self-locking function of the free wheel (34).

Description

Starter motor especially for Motor Vehicle with friction free-wheel starter

Technical field

The present invention relates to a kind of starter motor of the internal-combustion engine in particular for Motor Vehicle, internal-combustion engine is provided with the flywheel with band tooth starter ring, starter motor comprise output shaft, the arm handpiece that is provided with tooth, the gear that belongs to arm handpiece and and the arm handpiece mechanical connection be used to rotate the motor that drives described output shaft, described arm handpiece is mounted to and is endwisely slipping between rear portion neutral and forward position on the described output shaft, wherein, in this forward position, described band tooth starter ring engagement on described gear and the described internal combustion engine flywheel, described arm handpiece comprises:

Driver is controlled between described forward position and rear portion neutral by controller, and is provided with the drive groove with the tooth engagement of the complementation of described output shaft,

Connect the connected element that described gear is connected in described driver by means of mechanical freewheel as friction clutch, friction clutch comprises first rubbing surface by an element carrying in described gear or the driver, with second rubbing surface that is fixed in another element in described gear or the driver, and

Cause the elastic device of the self-locking of described freewheel.

Background technique

With reference to figure 1,2, starter motor 10 of the prior art comprises the motor 11 that is provided with coaxial mounted rotor 13, stator 12 and housing 15, and stator 12 is around the rotor 13 that is installed in the rotating shaft 14.Stator 12 is contained in the housing 15, and housing is fixed on the support 15 of starter motor, and support is in order on the standing part that is fixed in Motor Vehicle.Rotor 13 comprises the rotor winding that links to each other with the current collector (collector) 17 of axle on 14 that is fixed to motor 11.

Starter motor 10 also comprises and is parallel to that motor 11 extends and at the electromagnetic contactor 18 that radially is positioned at above it, contactor 18 is provided with drive coil B, the current collector 27 and the

power supply terminal

19,20 that are carried by the controlling rod (not shown).Fixed contact in

terminal

19,20 each self-forming insulating lid 21.A terminal 19 is intended to link to each other with the positive pole of battery, another terminal 20 by cable 22 with link to each other with brush holder 17 ' that current collector 17 is associated, it here is forward formula or radial, perhaps is axial type.

In Fig. 2, as described at document FR A 2796990, can see the element of the housing 15 of the rear bearing that seals reach 14.

Contactor 18 also comprises mobile core 23, and fixedly core 24, around the coil brace (not mark) of the guide sleeve that is used for mobile core 23 (not mark), and the chamber (not mark) that is used to hold coil B.This chamber links to each other with lid 21 by spinning here.Fixedly core 24 by means of its central opening as bear act on cover 21 and current collector 27 between the guide member of controlling rod of contact 27 of effect of cut-out spring (not shown).

In Fig. 2,, coil B and its support have been omitted along fixedly core 24 and guide sleeve part part for clearer.

When coil B is energized, the mobile core 23 edges fixedly direction of core 24 are subjected to the magnetic force towing, so that moving contact 27 is moved along contactor 18 fixed contact directions via controlling rod, drive the control gear 25 of arm handpiece 26 simultaneously, so that the control arm handpiece rear portion neutral (Fig. 1) and and the forward position of band tooth starter ring 300 engagements between motion, the band tooth starter ring (can flexibly) and the flywheel of internal combustion engine of motor vehicle are rotatably connected.

In Fig. 1,2, control gear 25 comprises controlling rod 25.

The Returnning spring 42 that bears against described chamber and be fixed on the collar of mobile core is set in mobile core 23, so that towards the rear portion neutral it is exerted pressure.Be called tooth the spring 41 of tooth spring (teeth againstteeth spring) be contained in the core 23, and with the top concurrent operation of the bar 25 that links to each other with mobile core 23 by means of the bar 43 that links to each other with axle 44.This spring 41 acts between the end convex shoulder of the housing bottom of core 23 and bar 43, and bar 43 the other ends are via the top concurrent operation of axle 44 with bar 25.

When the fixed contact of the

terminal

19,20 of current collector 27 and contactor 18 engages,, thereby axle 14 is rotated and the output shafts 28 of drive installation on the fore bearing 29 of support 16 just to motor 11 power supplies.Axle 14 must form the sun gear that belongs to the epicyclic train that constitutes gear reducer (gearedstep-down device) 30 with current collector 17 opposite front-end structures, gear reducer is arranged between the aiming axis 14 of output shaft 28 and motor 11.This epicyclic train comprises inner toothed retaining ring so that be meshed with the sun gear (not mark) of speed reducer 30.

One bearing (mark) radial effect is used to hold being provided with of the front end of axle 14 and axle 28 between the rear end of blind hole of this bearing.

Here the controlling rod 25 that is fork-shaped links to each other with mobile core 23 with spring 41 via bar 43 with its top, and comprises a rotating shaft 31 at intermediate portion, is used for its rotation in starter motor and installs.

The bottom that is fork-shaped of bar 25 is installed in the circular groove 133 on the driver 33 and comprises that profile is suitable for acting on the tooth or the boots of this groove side of driver.

Axle 31 comprises two parts of stretching out from the opposed faces of bar 25 bodies here, is made of plastic materials here, advantageously with bar 25 Unitarily molded shapings.

As described in the document FR A 2699605 of application on December 23rd, 1992, these parts for example are installed in rotation on two-part formula bearing, this bearing comprises and linking to each other with support 16 and preferably integrally molded with support 16 first portion, and forms, is formed on the actuator 18 or the second portion of the pad between its described chamber and the housing 15 more precisely opposed to each other.

In a distortion example, this pad is carrying two axial wings with hole, is used for the mounting portion of axle 31, and described bar is arranged between two wings, and one is exactly 131 among Fig. 2.

In a distortion example, the fixing belt ring gear of speed reducer comprises an extension, so that realize the hinge function of bar 25.For instance, this extension comprises two radially outstanding lugs, in order to hold the described part of axle 31.As described in document FR A 2725758, in a variant embodiment, provide the fixing base that is arranged between support 16 and the housing 15.So this base plate carrying the hinged support of main shaft 31.

Therefore, described bar is by means of the axle that is fixed on the described bar or one of the supporting member that is fixedly hinged, and installs in order to rotate on the support 131 that is fixedly hinged of starter motor, it may be noted that and this structure also can reverse.

Arm handpiece (starter head) 26 is mounted on output shaft 28 slides and comprises: actuation gear 32, and the driver 33 that drives by the fork of pivot controlling rod 25, and be axially disposed within freewheel 34 between driver 33 and the gear 32.These driver 33 inside are provided with spiral chute, are meshed with the mode of complementation and the external spiral tooth 36 on the output shaft 28.Therefore, arm handpiece 26 by controlling rod 25 along on the direction of the axial restraint blocks 35 of axle 28 carryings when mobile, be driven in the spiral motion mode, so that in place before the band tooth starter ring 300 of its gear 32 and internal combustion engine of motor vehicle is meshed.

This freewheel arm handpiece 26 is provided with friction clutch, here is truncated cone shape (frustoconical), so that starting gear 32 and driver 33 are engaged.Described such friction clutch among the document FR-A-2826696 (WO03/002870).It has the convex-concave rigid surface of two complementations, for example is truncated cone shape, by the friction concurrent operation and be fixed to gear 32 separately and driver 33 on, be used to transmit starting torque.

More information can be with reference to document FR-A-2826696, especially the 13rd, 14 page.

(driving stage) is when the motor 11 of starter motor drives the band tooth starter ring of internal-combustion engine when starting, described clutch is locked on the engagement positio, and when band ring gear (freewheel stage) with greater than the rotating speed actuation gear 32 of the rotational speed of driver 33 time, and when proceed-to-send, automatically remove.Each all has the gear 32 of this arm handpiece 26 and driver 33 and is used for the center hole that output shaft 28 passes through.

With reference to figure 3, Fig. 4, the gear 32 of arm handpiece 26 is fixed to one and is used for gear 32 is connected to element on the driver 33.This connecting element is provided with the first recessed rubbing surface 37 its outer placing, and here is truncated cone shape.

Rubbing surface 37 belongs to the inner peripheral surface in the skirt section that is fixed to the described connected element on the gear 36 here.In the distortion example, be equiped with lining 37.

Driver 33 side face within it is provided with the screw drives groove, is used for being meshed with complementary tooth 36, and this tooth is located on the outer circumferential face of output shaft 28.Driver 33 also is provided with groove 133 in the outside, be used to hold the fork of controlling rod 25, and has convex, is the friction of truncated cone shape or wear-resisting lining 39 here at front end.This lining 39 preferably has filler based on thermosetting property plastic material or thermoplastic plastic material, so that obtain the friction factor of required low wearing and tearing.This lining 39 is by in the circular groove of rivet clasp on driver 33, and has second a protruding rubbing surface 40 in the periphery, this rubbing surface and first rubbing surface 37 are with coaxial and complimentary fashion concurrent operation, so that form the truncated cone shape friction clutch, constituting between gear 32 and driver 33 is that separable mechanical freewheel connects here.In variant embodiment, each rubbing surface is consistent each other and form the hemisphere friction clutch.

Cap (mark) bending attaches components on the protuberance described, and acts on mutually with axial clearance between lining 39 and the connected element.

In variant embodiment, document is described as described, and described connected element is fixed on the described driver, belongs to described gear thereby described rubbing surface 37 belongs to driver and described 39.

It should be noted, when mobile core 23 is attracted with respect to the fixedly core 24 of contactor 18, with internal combustion engine flywheel on the forward position of band ring gear engagement on, gap d 1 between fixed stop 35 and the gear 32 can or just (Fig. 3) or negative (Fig. 4), depend on the geometric distribution of each part of starter motor.In these accompanying drawings, schematically illustrated fixedly core 24 and subsequently with the fixing mobile core 23 of core 24 closings.Yet, in this position that 23 motions of mobile core finish, driver 33 and therefore arm handpiece 26 under the effect of inertia and groove 38 and the active force of 36 in tooth, can also continue to move.

In Fig. 4, gear 32 is resisted against block 35, and negative sense gap d 1 continue with the compression stroke d2 of the crew-served tooth in the top of controlling rod 25 to tooth spring 41 after be absorbed.Controlling rod 25, is pressed against on first rubbing surface 37 so that will serve as a contrast 39 second rubbing surface 40 on driver 33 around the pivot action of axle 31.Thereby caused the self-locking of arm handpiece 26, and the driving torque normal delivery is to gear 32.

On the other hand, the situation lower gear 32 of pressure spring 41 not with respect to block 35 forward gap d 1 exist (with reference to figure 3) can cause between two

rubbing surfaces

37,40 not have contact, this will stop the self-locking of arm handpiece 26.So friction lining 39 freely rotates or produces the rotation of slide effect with respect to first rubbing surface 37 on the connected element, and does not have the moment of torsion transmission between driver 33 and gear 32.So just can not the hot machine of starting.

In order to ensure obtain the self-locking effect on arm handpiece 26, following way is just enough on the principle: determine the size of starter motor, make d1 with respect to block 32 stages of 35 actuation gears negative sense always.First defective of this scheme is exactly, geometrical construction according to each part of starter motor distributes, when contactor 38 was energized, the driving force that is applied on the driver 33 by controlling rod 25 will be very high, thereby the mechanical pressure that causes lining 39 to act on first rubbing surface 37 increases.This high contact pressure in the friction clutch can cause friction clutch to wear and tear too early, also can form too high remnants and pull moment of torsion, will cause the freewheel function of arm handpiece 26 to reduce.This second defective that has the scheme in negative sense gap is the impact that block 35 must bear when driving stage gear 32 applies impact at every turn.

In Fig. 1, the axial action resilient pad can axially be fitted in the described freewheel.This pad is in being arranged on the anterior radially shoulder of friction lining that is fixed in driver in the case and bending between the internal surface of the described lid on the connected element, so that flexibly force rubbing surface to contact with each other.Consequently, impose on the predetermined axial force that rubbing surface makes it to press each other.This resilient pad can also be replaced by spiral compression spring, perhaps belongs to described lid.

Be used for causing by friction this pad of the self-locking of freewheel, general tems is called elastic device, is described among document FR A 2826696 (WO03/002870) and the FR A 2772433 (US A 6237442).

Geometrical construction according to each part of arm handpiece distributes or wearing and tearing, resilient pad or the spring inaccuracy location in freewheel, the variation that can cause rubbing surface to press power indirectly, thus the auto-lock function of friction clutch or the freewheel function of arm handpiece can be influenced.

Summary of the invention

The object of the present invention is to provide a kind of starter motor that is provided with the freewheel arm handpiece of friction operation, can overcome described defective and can cause the self-locking of described arm handpiece in the driving stage reliably.

Another object of the present invention is to improve the function of arm handpiece in the freewheel stage.

Another object of the present invention is the working life that increases starter motor.

According to starter motor of the present invention, wherein connected element is fixed in an element in gear or the driver, it is characterized in that, elastic device comprises: comprise at least one in described arm handpiece, be arranged in described connected element and described driver or the gear, as the initiation spring between described another element of second element, in order to neutral described two rubbing surfaces are separated from each other in described arm handpiece, simultaneously by the friction-produced moment of torsion so that cause the described self-locking of described freewheel.

Be provided with and cause the axial or radial effect power of spring generation, obtain to pull moment of torsion between driver and gear to pass through friction, and described each rubbing surface separates when static, the neutral of friction clutch is corresponding to the neutral of arm handpiece.In the driving stage, this towing moment of torsion is enough to accurately cause the self-locking of described starter motor, but keeps low relatively level, thereby can not reduce speed difference significantly and can not offset the effect of tooth to the tooth spring in the freewheel stage.

In the freewheel stage, described initiation spring can reduce the contact pressure between the rubbing surface and rubbing surface is separated from each other, because it is arranged in the arm handpiece, so that described driver is separated with described gear, this makes and can reduce wearing and tearing and improve the performance in freewheel stage.

This initiation spring has the filtration function because it make can damping vibration, the impact when especially rubbing surface contacts with each other.Therefore, reduced the hammering phenomenon of rubbing surface.

Therefore, the rubbing surface of freewheel was protected in all stages, thereby improved the working life of starter motor.

In addition, when the friction clutch of described freewheel was truncated cone shape, it was benefited because of the big adjustment range of rubbing surface angle, because described initiation spring is arranged in the described arm handpiece, so that described driver is separated with described gear.

Therefore, can for example increase or reduce the angle of rubbing surface.

When friction clutch is the semicircle sphere, also has the benefit that radius of curvature has big adjustment range.

The rigidity of described initiation spring can be so accurately determines, tends to described driver and gear separately and discharge the effect of rubbing surface because this spring has.

Other features can independent or combined use, so that accurately cause the self-locking of described arm handpiece and at freewheel stage release rubbing surface:

Block is fixed on the described connected element, this connected element comprises the bottom of being fixed in described gear in the side in contrast to this block, and cause between the front surface that spring is arranged on the bottom of connected element and driver, tend to make the axial action of driver against block so that apply.

The rubbing surface of driver belongs to the friction bushings that is fixed in driver, and causes between the front surface that spring is arranged on the bottom of connected element and driver, tends to make the axial action of the rear surface of described friction bushings against block so that apply;

Described block is advantageously formed by radial rib;

Described initiation spring can be the pad at the axial direction elastically deformable, for example Bei Shi pad;

Spring can be formed by spiral compression spring.

Advantageously, setting belongs to described bottom and/or is not fixed in the driver of connected element or the convex shoulder of second element in the gear, so that locate described initiation spring.

Described initiation spring is arranged on the interior week of connected element and is not fixed between described second periphery of connected element, so that produce the radial friction effect between driver and gear;

Described initiation spring comprises the waveform spring sheet between described second periphery that is located at interior week of connected element and is not fixed in connected element, so that produce the radial friction effect between driver and gear;

Described waveform spring sheet is fixed in the cylindrical extension part of extending from the skirt section that connected element has.

In one embodiment, described connected element is fixed on the described gear, and described initiation spring action is between the rear surface of connected element bottom and driver front surface or act between connected element skirt section and the driver.

In variant embodiment, described connected element be fixed on the driver and described initiation spring action between the front surface of connected element bottom and gear rear surface or act between connected element skirt section and the gear.

A plurality of initiation springs can be set.These springs are for example contacted and are installed or work with split-level.

Description of drawings

By non-limiting instance also in conjunction with the accompanying drawings, other advantage and characteristic can more clearly be understood from the following example of the present invention, wherein:

Fig. 1 is the perspective illustration of starter motor known in the state of the art, and in arm handpiece place partly cut-away;

Fig. 2 shows the axial section view of starter motor among Fig. 1;

Fig. 3 and 4 shows the schematic representation in known arm handpiece of driving stage, has forward gap (do not have in the clutch friction cone pressured) and negative sense gap (two rubbing surfaces of clutch are pressured) of relative block respectively;

Fig. 5-7 shows the axial section view according to three variant embodiment of the present invention, and each has all used the initiation spring that is integrated in the arm handpiece;

Fig. 8 is the cross sectional view along Fig. 7 center line 8-8, shows the form of the radial effect spring between driver and the bell portion.

Embodiment

With reference to figure 5-8, use identical reference mark with same or analogous element among Fig. 1-4.

In Fig. 5-7, for simplicity, do not illustrate controlling rod 25 and contactor.

In Fig. 5, arm handpiece 26 comprises: actuation gear 32 is suitable for by the driver that fork drove 33 of controlling rod among Fig. 1 25 and is truncated cone shape or the freewheel 34 that forms for semicircular friction clutch among the embodiment at a remodeling here.The latter is provided with two rubbing

surfaces

37,40 that annular is complementary.It is protruding or recessed that these surface configurations are.

First rubbing surface 37 is arranged on 48 inboards, truncated cone shape skirt section of connected element 45, and this connected element is bell towards driver 33.Skirt section 48 is axially gone up and is limited by the backstop 47 that is fixed on the bottom 46 on the gear 32 and be fixed on the connected element 45 at maximum free end.Described skirt section 48 and connected element 45 are rotatable parts.

Bottom 46 radially extends between skirt section 48 and the gear 32, and has the plane annular supporting surface 49 of front surface 50 settings of relative driver 33 and lining 39.Described block 47 is formed by the ring rib of radial ring around lining 39.

More information can reference WO03/002870.

Therefore, in one embodiment, bottom 46 is by welding, and for example laser bonding is fixed on the gear 32 that has atubular extension portion (not shown) for this purpose.In variant embodiment, as among Figure 11 of document WO 03/002870, bottom 46 can be fixed by being folded into atubular extension portion.

Make gear and connected element by separating landform like this,, can select their material according to the function that will carry out for each parts.In variant embodiment, gear 32 and connected element 45 constitutes by identical materials or two kinds of materials for example as two kinds of single-pieces that agglomerated material is made among Fig. 1 and 2 of document WO 03/002870 or among Fig. 3.

In variant embodiment, bottom 46 is for tilting, as also can be from seeing Fig. 3 of document WO 03/002870.

In one embodiment, as among Fig. 8 of document WO 03/002870, described block 47 is made of snap ring.

In the case, skirt section 48 is inner in Fig. 5-8 to be had the rubbing surface 38 that formed by the skirt section inner peripheral surface and has such as grooves such as grooves at its free end, this groove is used to install and the described driver concurrent operation and the fixing snap ring of each part of arm handpiece, and arm handpiece can be operated and transport thus.

In variant embodiment, this snap ring is replaced by each the radial oriented protruding tongue or the rib of the free end acquisition in the skirt section that curves inwardly.

In variant embodiment, described block comprises and is folded into the free-ended lid in skirt section that this skirt section has projection such among Fig. 1,2 for this purpose.

In variant embodiment, the free end in described skirt section has blind mortise, and block has radially tenon in its periphery, is fitted in the described axial orientation mortise in the mode of complementation.

The adjacent transverse edge of mortise is pushed by the part and contacts with the tenon that is connected to the mortise bottom.

In variant embodiment, the skirt section of described block and connected element is Unitarily molded.

Therefore, block is fixed on the annular connected element, and annular connected element has the bottom on a relative side with block.

Among the every embodiment who also is applicable among Fig. 6,7 who is addressed.

In Fig. 5-8, second rubbing surface 40 is positioned on the lining 39 that is in driver 33 outer circumferential face places and parallel first rubbing surface 37 extends, but axial distance is short slightly.

Rubbing

surface

37,40 is complimentary to one another.

Described lining 39 can for example be fixed on the driver in the driver circular groove by adhesive bond, perhaps in variant embodiment, be fixed on the driver that to make by plastic materials by embedding molding technique, make these lining 39 rivet clasps on driver.

Nature, the size of described block 47 so limit make its can with the rear surface concurrent operation (with reference to figure 5-7) of lining 39.

In the driving stage, by the synergy of the friction cone after being engaged via the groove on the driver 33 of the driving of the tooth on the output shaft and two rubbing

surfaces

37,40 by motor, acquisition has the locking of the friction operation arm handpiece 26 of freewheel 34.

At the clutch lock fixed position (driving stage) of freewheel 34, described motor 11 actuation gears 32 and band gear come cranking internal combustion engine.When the freewheel stage of internal-combustion engine with greater than the rotating speed actuation gear 32 of starter motor 33 speed the time, this clutch is released.

This driver 33 has the fork-shaped bottom that circular groove 133 is used to admit Fig. 1 controlling rod 25.

For the reliable in function that makes arm handpiece 26 realizes, the present invention's suggestion was opened rubbing surface in 37,40 minutes in the inside self-locking of driving stage initiation freewheel 34 and in the freewheel stage.

The initiation of self-locking provides by being built in the elastic device 51 of structure as the freewheel 34 of friction clutch, is intended to produce the low-intensity drag force and at the freewheel stage rubbing surface that gets loose.

The existence of initiating device 51 is by the towing of the friction-produced between driver 33 and the gear 32 moment of torsion, and this moment of torsion is enough to cause in the driving stage self-locking of arm handpiece 26, but relatively little so that significantly do not reduce speed difference in the freewheel stage.

According to the present invention, the initiation of friction clutch self-locking realizes by the elastic device 51 that is integrated in the arm handpiece, one of driver 33 or gear 32 elements and be fixed in gear 32 or driver 33 elements in another connected element 45 between form reaction.

This reaction is axial in Fig. 5,6, and is radially in Fig. 7,8.

Preferably, the axial force that tooth spring (with reference to figure 2) applied on driver 33 less than tooth of the axial force that applied of the initiating device 51 in the arm handpiece.

In Fig. 5-8, described connected element 45 be fixed on the gear and with its formation whole or with aforesaid mode regularly be secured to gear, make elastic device 51 in Fig. 5, Fig. 6, axially be arranged between the front surface of the rear surface of gear 32 and driver 33, and in Fig. 7, Fig. 8, radially be arranged in the connected element between week and driver periphery.

Elastic device 51 among Fig. 5 comprises spring R1, and this spring is made of the packing ring of elastically deformable in the axial direction for instance, for example Belleville shape packing ring.Spring R1 is arranged between the front surface 50 of the back supporting surface 49 of connected element 45 bottoms 46 and starter motor 33, so that rubbing

surface

37,40 is separated from each other, and the device in document FR-A-2772433 and WO03/002870 not contacts and produces from causing convex-concave rubbing surface by two complementations at this.

In Fig. 5, spring 51 is resisted against the front surface of the lining 39 that belongs to driver front surface 50 with its outer rim, and the inner edge of this spring is resisted against on the surface 49 of bottom 46.

The rear surface of the lining 39 of friction clutch is resisted against on the block 47 in skirt section 48, so that produce surplus torque by friction between connected element 45 and driver 33.The existence that causes spring R1 produces the towing moment of torsion by friction between driver 33 and gear 32, in the driving stage, this moment of torsion is enough to cause the self-locking of described arm handpiece 26, but less relatively, thereby can not reduce the speed difference in freewheel stage significantly.

Take place the freewheel stage with the first step of the contact pressure contact that reduces and second step that described therebetween rubbing surface is separated from each other under the effect that causes spring corresponding to described rubbing surface therebetween.

In the variant embodiment of Fig. 6, spring R1 is replaced by the spiral compression spring R2 between the shoulder on front surface 50 that is fixed on driver 33 and the bottom 46.The effect of this spring R2 and Fig. 5 spring consistent, the result is after two rubbing surfaces were opened in 37,40 minutes, spring force is pressed against block 47 on the skirt section 48 with lining 39.

With reference to figure 7,8, elastic device 51 comprises radial effect spring R3, is made of annular waveform spring sheet.This spring sheet is arranged between the side face of the cylindrical extension portion 52 in skirt section 48 and lining 43.Rubbing

surface

37,40 keeps separating in neutral, and spring R3 allows to form produce moment of torsion between gear 32 and driver 33 after the initiation certainly of clutch to the permanent rubbing action of connected element 45 and lining 39.

This power depends on applicable cases, and selects so that interfere the motion of driver with respect to gear within bounds.

In this embodiment, the roughly ring part of U-shaped is extended at its free end in truncated cone shape skirt section 48, the circular bottom part of its axial orientation comprises cylinder-shaped extension portion 52, forms the portion that is supported by between the radial arm of this extension part arm handpiece axis that the output shaft axis coincides in two sensings and Fig. 1.One of them arm is to be supported by the part that portion 52 is connected in skirt section 48 with described, and another more longer arm formation is suitable for and the crew-served block 47 in the rear surface of lining 39.

Described U-shaped partly is configured for holding the groove of the groove form of wavy spring R3.

Ring bush 39 has the first portion that constitutes rubbing surface 40 in its periphery.Extend second column part 140 by this part, i.e. the second axial annular portion.As shown in Figure 8, described part 140 is the supporting portions that are used for spring R3 corrugated part.Therefore, this spring R3 acts on the interior week that belongs to the portion that is supported by 56 in week in the connected element and belongs between the part 140 of starter motor 33 peripheries.

In all cases, by elastic mechanism of the present invention produced, act on the starter motor place or more particularly the power at groove 133 places in described embodiment less than Fig. 2 in tooth power that the tooth spring is produced.

Nature is referred from Fig. 7 and Fig. 8, and the spring R1 among Fig. 5 can be substituted by axial ripple pad.In variant embodiment, it can be an elastic body shim.Use the scheme of pad R1 compacter more in the axial direction than the structure among Fig. 6.

Spring R2 among Fig. 6 can obtain longer springing stroke, and in variant embodiment, it can have variable spacing so that obtain better progressive effect.

In Fig. 6, driver 33 can also be provided with shoulder, is used for centralizing spring R2.In Fig. 5, bottom 46 is provided with a centering shoulder in a distortion equally, is used for the inner edge of pad R2.

Structure among Fig. 7 can also be turned around, makes to form groove in lining 39, and described supporting portion 140 constitutes the bottom of groove.At this moment, the described portion of being supported by is directly connected in the free end in skirt section.

In variant embodiment, spring R3 is made of ring, for example and the extension part 52 that is connected on the skirt section 48 contact, and described block is attached to described being supported by in the portion, so that ring that can mounting spring R3.The ring of this spring R3 contacts in each bump and the described part 140 that inner peripheral surface has circumferential arrangement.The free end of this bump preferably gives rounding.Advantageously described bump is oblique.

In one embodiment, the ring of spring R3 for example utilizes Bond to be bonded on the extension part 52, and making does not need to use groove.

Spring R3 always bears against on extension part 52 and the part 140.

In variant embodiment, initiating device 51 comprises the pad that a plurality of polyphones are installed, and for example two Belleville pads are installed between each Belleville pad and separated pad.In variant embodiment, described spring has delayed phase and turns the mode of using into, and first spring at first works, and next is that two springs work.

Each part of arm handpiece 26 can also turn around.For instance, in variant embodiment, the skirt section with rubbing surface 37 is fixed on the driver 33, and this moment, the second protruding rubbing surface 40 was fixed on the gear 32.More information can be with reference to Fig. 5, the Fig. 6 in the described document WO 03/002870.

At this moment, spring R1, R2 act on the connected element bottom that constitutes the driver front surface front surface and and the rear surface of the gear that is oppositely arranged of the front surface of connected element bottom between.

At this moment, spring R 3 acts between the periphery of interior week of connected element and gear.Subsequently, so part 140 close gears.

In all embodiments, spring R1 and R2 act on driver front surface and and the rear surface of the gear 32 that is oppositely arranged of driver front surface between, and described spring R3 radial effect is in interior week in skirt section be not fixed between the gear or driver in described skirt section.

Skirt section with inclination or radial directed bottom can be a single-piece, perhaps is fixed on the element integrant with it.

The present invention can also be applied between motor 11 and arm handpiece 26 not to be had on the starter motor of reducing gear 30.At this moment, axle 14 also is an output shaft.

The current collector 17 of motor 11 can also be radially or axial.

Therefore, what driver 33 and gear 32 can metals, or constitute by agglomerated material.

Here, driver 33 and controlling rod 25 are advantageously made by plastic materials, to be convenient to the required form by molded these parts of acquisition.

A side of the groove 133 of the most close freewheel 34 can for example be covered by metalwork by embedding is molded.

And away from another side of freewheel 34 metal advantageously, simultaneously for example by embedding molded being fixed on the driver.This side for example is made of metallic shim.

At this moment, always obtain the contact of metal-plastic material.

In variant embodiment, as described in document FR A 2843427, contactor 18 be separate and for example near this rear bearing of 14 axle 14 perpendicular to motor 11 extend.At this moment, the bar that act on controlling rod 25 tops, is connected in mobile core is connected on the mobile core second bar of tooth spring and the resetting-mechanism that acts between these two bars by acting on tooth.Therefore, described bar 43 directly or indirectly-acting described tooth to the tooth spring on.

In variant embodiment, as described in document FR A 2745855, described gear 32 forms with respect to support 16.

Described bar 25 is carrying axle 31, is used for the support 131 (Fig. 2) that is fixedly hinged that its pivot is installed in starter motor 25.In variant embodiment, this is decided articulated stand and is carrying axle, and described controlling rod has a hole that axle is passed through.

In variant embodiment, described contactor is installed with respect to motor coaxle ground, make described arm handpiece realize the effect of mobile core, but reference FR A 2841941 is described.Therefore, the control gear that is used for moving this arm handpiece needs not to be bar.

In variant embodiment, a cover is provided for causing the

support

49,50,52,140 of spring.For instance, the front surface 50 of the driver of advantageously being made by plastic materials 33 is formed by the metallic shim that is fixed in driver.This can be applied to the rear surface 49 of connected element equally.In variant embodiment, supporting part 140 is a metal.In variant embodiment, described cover is the material of noise reduction.

Described rubbing surface 40 can be formed directly on the outer circumferential face of driver, and rubbing surface 37 can belong to and is fixed in the friction bushings on week in the connected element skirt section.

Therefore, described skirt section 48 can be cylindrical.

In specification, described starter motor is the starter motor that is used for the internal-combustion engine that is also referred to as hot machine of Motor Vehicle, and Motor Vehicle for example is light-duty vehicle or heavy truck or ship etc.

The present invention is applicable to that naturally internal-combustion engine fixes and be used for for example driving the situation of at least one power take-off.

Therefore, internal-combustion engine can be fixed and advantageously via clutch actuation movement passing shaft.

All combinations all are feasible.

Claims

1. starter motor that is used for the internal-combustion engine of Motor Vehicle, internal-combustion engine is provided with the flywheel with band ring gear (300), described starter motor comprises the output shaft (28) that is provided with tooth (36), arm handpiece (26), the gear (32) that belongs to arm handpiece (26), and and the motor (11) of arm handpiece (26) mechanical connection, described arm handpiece (26) is mounted at described output shaft (28) and upward endwisely slips between rear portion neutral and forward position, wherein, in this forward position, described band ring gear engagement on described gear (32) and the described internal combustion engine flywheel, described arm handpiece (26) comprising:

Driver (33) is controlled between described forward position and rear portion neutral by controller, and is provided with the drive groove (38) with tooth (36) engagement of the complementation of described output shaft (28),

Connect the connected element that described gear (32) is connected in described driver (33) by means of mechanical freewheel (34) as friction clutch, friction clutch comprises first rubbing surface (37) by an element carrying in described gear (32) or the driver (33), with second rubbing surface (40) that is fixed in another element in described gear (32) or the driver (33), and

Cause the elastic device (51) of the self-locking of described freewheel (34),

Described connected element be fixed in described gear (32) or the driver (33), as an element of first element,

It is characterized in that, described elastic device (51) comprise at least one in described arm handpiece (26), be arranged in described connected element and described driver (33) or the gear (32), as the initiation spring between described another element second element, that be not fixed in described connected element (45), in order to neutral described two rubbing surfaces (37,40) are separated from each other at described starter motor, simultaneously by the friction-produced moment of torsion so that cause the described self-locking of described freewheel (34).

2. starter motor as claimed in claim 1, it is characterized in that, it comprises the block (47) that is fixed in described connected element (45), described connected element (45) comprises the bottom (46) of being fixed in described gear (32) in a side opposite with described block (47), and described driver (33) has the front surface (50) relative with the bottom (46) of described connected element (45), described initiation spring is arranged between the front surface (50) of the bottom (46) of described connected element (45) and described driver (33), tends to make described driver (33) to be resisted against the axial force of described block (47) so that apply.

3. starter motor as claimed in claim 1, it is characterized in that, it comprises the block (47) that is fixed in described connected element (45), described connected element (45) comprises the bottom (46) of being fixed in described driver (33) in a side opposite with described block (47), and described gear (32) has the relative rear surface, bottom (46) with described driver (33), described initiation spring is arranged between the rear surface of the bottom (46) of described connected element (45) and described gear (32), tends to make described gear (32) to be resisted against the axial force of described block (47) so that apply.

4. starter motor as claimed in claim 1, it is characterized in that, it comprises the block (47) that is fixed in described connected element (45), described initiation spring is arranged in order to apply a member abuts tending to make in described gear (32) or the driver (33) in the axial force of described block (47), and described block (47) is formed by the radial rib that is fixed in described connected element (45).

5. starter motor as claimed in claim 1 is characterized in that, described initiation spring comprises can be at the pad of axial elasticity distortion.

6. starter motor as claimed in claim 5 is characterized in that, described initiation spring is the Bei Shi pad.

7. starter motor as claimed in claim 1 is characterized in that, described initiation spring is formed by spiral compression spring.

8. starter motor as claimed in claim 4, it is characterized in that the bottom of described connected element (45) and/or be not fixed in the described driver (33) of described connected element (45) or described second element in the gear (32) is provided with the shoulder that is used to locate described initiation spring.

9. starter motor as claimed in claim 1, it is characterized in that, described initiation spring be radial effect type spring and be arranged on the interior week of described connected element (45) and be not fixed in the described gear (32) of described connected element (45) or the periphery of described second element in the driver (33) between so that between described driver (33) and described gear (32), produce the radial friction effect.

10. starter motor as claimed in claim 9 is characterized in that, described initiation spring is the ripple spring sheet.

11. starter motor as claimed in claim 9, it is characterized in that, described connected element (45) comprising: be fixed in the bottom (46) and the skirt section (48) that links to each other with described bottom (46) of described first element in described gear (32) or the driver (33), described initiation spring bears against in described skirt section (48) extended cylindrical extension portion (52) and belongs on the columnar portion (140) of described second element in described gear (32) or the driver (33).

12. starter motor as claimed in claim 11 is characterized in that, at least one in described extension part (52) or the columnar portion (140) constitutes the bottom of a groove.

13. starter motor as claimed in claim 11, it is characterized in that, described friction clutch is truncated cone shape, described connected element (45) comprising: the bottom (46) and the truncated cone shape skirt section (48) that links to each other with this bottom (46) of being fixed in described first element in described gear (32) or the driver (33), and in a side relative with the bottom (46) of described connected element (45), described connected element (45) carrying block (47).

14. starter motor as claimed in claim 13 is characterized in that, described second rubbing surface (40) belongs to friction bushings (39).

15. starter motor as claimed in claim 14 is characterized in that, described columnar portion (140) belongs to described friction bushings (39).