CN1107179C

CN1107179C - Device for preventing gear noise

Info

Publication number: CN1107179C
Application number: CN99101346A
Authority: CN
Inventors: 额田芳隆; 清水要司; 石坂孝史
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 1998-03-19
Filing date: 1999-01-22
Publication date: 2003-04-30
Anticipated expiration: 2019-01-22
Also published as: BR9902213A; ID22258A; KR19990078079A; KR100324251B1; TW417012B; JP3319718B2; JPH11270656A; CN1229889A

Abstract

This invention is to keep spring loads of a torsion coil spring constant to smooth the operation of an auxiliary gear in a gear-engagement noise reducing device. An auxiliary gear is rotatably provided adjacent to a primary driving gear, and a retainer pressed onto the shaft-end of a rotary shaft and the auxiliary gear are connected by a torsion coil spring. A part of an outside peripheral flange in the retainer is formed into a notch-like shape, and a guide part which is projected parallel to the axial direction of the rotary shaft on the inside peripheral side relative to the outside peripheral flange. Then, the torsion coil spring is provided to pass through between the outside peripheral flange and the guide par. When the diameter of the torsion coil spring is reduced in order to given a pre-load, a part of the inside peripheral surface of the coil spring is brought into contact with the guide part, whereas other part cannot contact the rotary shaft or the like.

Description

Prevent the device of gear noise

The present invention relates to prevent the device of gear noise, this device gives phase difference to being located at coaxial master gear and pinion, and it is meshed with coupling gear, in view of the above to lower gearing noise.

At the real device that prevents gear noise that has disclosed on clear 63-59260 number on the crankshaft of being located at motor of opening.This prevents that the gear noise device from having adjacent first driving gear and the pinion as master gear that is equipped on the crankshaft, between the pinion and first driving gear, be provided with phase difference, and and the break that is provided with of crankshaft unitary rotation ground and pinion between clamping torsion-coil spring, come pinion to be composed with rotation potential energy by this torsion-coil spring being given preload to the direction of removing phase difference, by first driving gear and pinion are meshed with main driven gear as engaging gear the opposing party's speed change clutch, to lower gearing noise.

Fig. 7 is illustrated in to make pinion a rotate (direction shown in the arrow A) to the work sense of rotation on this device, allow torsion-coil spring b produce the horizontal type figure of the state of preload, torsion-coil spring b is by moving and diameter reduction when arriving position shown in the solid line along the arrow A direction with the connecting end c of the pinion a position (shown in the dotted line) when free, the O1 of the center of torsion-coil spring b when free is to O2 and produce eccentric corresponding to each center of break d and rotatingshaft e, its as a result the part of torsion-coil spring b touch the inner peripheral surface (B point) of break d, a part touches the outer peripheral surface (C point) of rotatingshaft e.

When but this contact is created in irregular place and length, for the load on spring that pinion is applied the necessary torsion-coil spring b of preload becomes not necessarily, its result, it is unstable that the action of pinion a becomes.And as shown in Figure 8, when torsion-coil spring b had multireel, when diameter reduction, a part of coiling may overlap, and at this moment also made the load on spring of above-mentioned torsion-coil spring b become unstable, therefore also may produce the action instability of pinion a.

In order to solve above-mentioned problem, the 1st scheme of gear noise device that prevents of the present invention is, be provided with phase difference adjacent being equipped between master gear on the same rotatingshaft and the pinion, and and the break that is provided with of above-mentioned rotatingshaft unitary rotation ground and pinion between clamped torsion-coil spring, pinion is composed with rotation potential energy to the direction of removing above-mentioned phase difference by this torsion-coil spring, applied preload in view of the above.To lower the noise that meshes with coupling gear.The above-mentioned gear noise device that prevents is characterised in that, is provided for supporting the guide portion of torsion-coil spring inner circumferential side on above-mentioned break.

The feature of the present invention's the 2nd scheme is on the basis of the 1st scheme, when the interval between guide sections and the break is taken as D, and when the linear diameter of torsion-coil spring is taken as d, D＜2d.

Because on break, be provided with the guide portion that is used to support the torsion-coil spring inner circumference, so when making the torsion-coil spring diameter reduction in order to apply preload, its inner circumference contact supports on the guide portion, the inner circumference of torsion-coil spring only contacts with guide portion for this reason, and point of contact is certain, and the length of contact can be shorter, so the load on spring of torsion-coil spring is stable, and its work of pinion as a result is also stable.

When the interval with guide portion and break is taken as D, when the linear diameter of torsion-coil spring is taken as d,, when diameter reduction, can prevent that the state of affairs that the spiral of torsion-coil spring partially overlaps from taking place if make D＜2d.Thereby, can make the working stabilityization of pinion in view of the above.

Fig. 1 is near first driving gear part the amplification sectional view relevant with embodiment.Fig. 2 is the sectional view of the motor relevant with present embodiment.Fig. 3 is an expression guide portion amplification sectional view.Fig. 4 is the view of the arrow E direction of Fig. 1.Fig. 5 is the 5-5 sectional drawing of Fig. 1 of the state of (before the preload) before expression work is rotated.When Fig. 6 is preload and same master drawing Fig. 5.Fig. 7 is the ideograph that the expression conventional example produces preload condition.Fig. 8 is the sectional view of the torsion-coil spring of expression conventional example at the overlapping state of spiral portion.

Fig. 1 to Fig. 6 represents to be applicable to one embodiment of the present of invention of first driving gear on the crankshaft that is located at motor.Fig. 1 is first driving gear part amplification sectional view nearby.Fig. 2 is the sectional view of the motor relevant with present embodiment.Fig. 3 is an expression guide portion part amplification sectional view.Fig. 4 is the view of direction shown in the arrow E of Fig. 1.Fig. 5 is the 5-5 sectional view of Fig. 1 of the state of (before the preload) before expression work is rotated.The same master drawing of Fig. 5 when Fig. 6 is preload.

At first on Fig. 2, this motor has crankshaft 2, starting clutch 3, rotatingshaft 4.Above-mentioned crankshaft 2 is connected with piston rod 1.Above-mentioned starting clutch 3 is connected an end of crankshaft 2.Above-mentioned rotatingshaft 4 is connected with crankshaft 2 by this starting clutch 3, and free to rotate being located on its excircle.

On this rotatingshaft 4, be adjacent to be provided with first driving gear 5 and pinion 6 as master gear.Axle 4, with first driving gear 5 across the end of a side of pinion 6, be equipped with break 7.

Pinion 6 is and first driving gear, 5 same diameters, the same number of teeth, perhaps these all slightly different gears.This first driving gear 5 and pinion 6 are meshed with first driven gear 11 of clutch 10 respectively.

First driven gear 11 becomes one with the clutch ectosome of clutch 10, its rotate through clutch endosome pass to main shaft 12 again from the counter shaft gear 14 of mainshaft gear 12 ' pass to countershaft 13 '.

To preventing that noise mechanism from describing, extremely shown in Figure 6 as Fig. 1 and Fig. 3, pinion 6 free rotation ground supportings utilize spring ring 15 to prevent to come off for rotatingshaft 4 on the position 14 of the close master gear 5 on the rotatingshaft 4 below.

Among each tooth of pinion 6 and master gear 5, on a pair of position overlaps with tooth, form chamfering 16,17 respectively, by making each chamfering 16,17 unanimity, the pinion 6 when making preload and the location of master gear 5 become easy.Near the chamfering 17 of pinion 6, connect the side and form stop hole 18.

On position rotatingshaft 4 and master gear 5 overlaps with the same bit position mutually of tooth, form from the axially inboard positioning groove of cutting 19 of shaft end, this positioning groove 19 is at the shaft end opening.

Break 7 is roughly cup-shaped, utilize iron plate or other suitable metal to form by punch process, it is provided with the sidewall parallel with the rotation end face of rotatingshaft 4 20 and peripheral outer lips 21 and interior all flanges 22, this peripheral outer lips 21 from the outer circumference portion of sidewall to integral body of pinion 6 one side-prominent formation.Should give prominence to integral body of formation at the inner circumference portion opposite direction by interior all flanges 22.

Part at interior all flanges 22, be provided with to the outstanding location indentations 23 of central side, can be coupled in the positioning groove 19, with the sidewall 20 of the central part same phase place nearby of the location indentations 23 of the circumferencial direction of interior all flanges 22 on form the stop hole 24 that connects, the position of 60 ° of phase differences forms guide portion 25 having roughly from this stop hole 24 to the work sense of rotation.

Guide portion 25 is the parts that arrive sidewall 20 from the end of peripheral outer lips 21, the slit is made in both sides of the edge along the rectangular block portion that becomes guide portion 25, eliminate the part that is equivalent to interval D described later of the end of this rectangular block portion, then will this rectangular bulk curve axis parallel with rotatingshaft 4 to inner circumferential side, form guide portion 25 in view of the above from peripheral outer lips 21.The above-mentioned interval D of the inner peripheral surface of the surface of the outer circumferential sides of guide portion 25 and peripheral outer lips 21 is the value of aftermentioned defined in addition.

Enough amounts will be guaranteed with the interval F of the inner peripheral surface of interior all flanges 22 in the inner circumferential side surface of guide portion 25, so that when the torsion-coil spring undergauge, other parts do not contact with peripheral outer lips 21 or rotatingshaft 4.

In addition, for the position from stop hole 24 applies preload, the angle that the position of guide portion 25 separates defined to revolute pair working gear sense of rotation (direction shown in the arrow A) roughly is 60 ° in the present embodiment.This angle can guide torsion-coil spring 30 described later most effectively, but this angle preferably scope be preferably in roughly 90 ° to set in the interior any range roughly in 180 °.

Break 7 utilizes torsion-coil spring to be connected with pinion 6, torsion-coil spring 30 is multi-turn springs, the two end part of winding direction bend about 90 ° respectively on the contrary, form the connecting end 31 and the connecting end 32 that is connected to the stop hole 24 of break 7 of the stop hole 18 that is connected to pinion 6.For the position that makes connecting

end

31,32 is consistent, when free, give certain phase difference when work is rotated.

Torsion-coil spring 30 is by being installed on the break 7 between guide portion 25 and the peripheral outer lips 21, and the above-mentioned interval D between guide portion 25 and the peripheral outer lips 21 is set for, when the linear diameter with torsion-coil spring 30 is taken as d, satisfies the relation of D＜2d.

The following describes the effect of present embodiment.At first the connecting end 31 with torsion-coil spring 30 is connected on the stop hole 18 of pinion 6, and the master gear that this pinion 6 is positioned at rotatingshaft 4 is nearby on the position 14 and free to rotate and utilize spring ring 15 to prevent to come off.Connecting end 32 is connected on the stop hole 24 of break 7, location indentations 23 is engaged in the positioning groove 19, by fixing on the excircle that interior all flanges 22 is pressed into rotatingshaft 4.

Torsion-coil spring 30 connects break 7 and pinion 6 in view of the above, and become by being provided in rotatingshaft 4 free state on every side between peripheral outer lips 21 and the guide portion 25 like that, this state is a state shown in Figure 5, torsion-coil spring 30 keeps at interval owing to do not contact with either party of the excircle of the inner circumference of break 7 and rotatingshaft 4.

Therefore pinion 6 is rotated along the work sense of rotation shown in the arrow A, its chamfering 17 is overlapped with the chamfering 16 of master gear 5, connecting end 31 is followed in this torsion-coil spring 30 diameter reduction to guide portion 25 1 side shiftings like this, and its center is also eccentric to O2 by the O1 of free state.

Its as a result torsion-coil spring 30 from as the connecting end 32 of fixed end towards sense of rotation, preceding half side rotatingshaft 4 one sides that move to, later half peripheral outer lips 21 1 sides that move by side to are so but be that fulcrum positions because its inner circumference portion butt is bearing on the guide portion 25 with guide portion 25.

Its result, torsion-coil spring 30 maintains certain interval with the inner peripheral surface of the peripheral outer lips 21 of break 7 and the outer peripheral surface of rotatingshaft 4, place beyond guide portion 25 is a contactless state, the contact position of 30 pairs of break 7 one sides of torsion-coil spring is certain, and contact length is only in the minimum degree of the circumferencial direction length of outer peripheral surface one side of guide portion 25.

The load on spring of torsion-coil spring 30 is certain for this reason, and pinion 6 is worked sleekly, and pinion is applied preload to work sense of rotation and tax in the other direction with rotation potential energy, can lower the gearing noise with first driven gear 11 simultaneously.

When the free state from Fig. 5 changes to the working state of Fig. 6, because guide portion 25 satisfies the relation of D＜2d with the interval D of break 7, so the part coincidence that utilizes this interval D can not produce spiral, its result, the phenomenon of conventional example shown in Figure 8 is prevented from.Therefore, the load on spring that can make torsion-coil spring 30 in view of the above is a certain value, and pinion 6 is worked sleekly.

Under the state that pinion 6 is rotated along the work sense of rotation, because connecting end 31 is roughly consistent with 32 position, when therefore torsion-coil spring 30 being carried out preload, can prevent that torsion-coil spring 30 from crooking, can make in view of the above preload stable, the work of pinion 6 is carried out sleekly.

Owing to the position of guide portion 25 is located at along the work sense of rotation relatively roughly is on 60 ° the position near the angle of release of the position of connecting end 31, therefore pass through to support the most mobile position, and when work is rotated, make torsion-coil spring 30 not produce too big moving.Channeling conduct efficiently.In addition, on the part of peripheral outer lips 21 and sidewall 20,, form rectangle block portion,, form guide portion 25, therefore can form guide portion 25 easily again with this rectangle block portion bending by from both side edges incision otch.

Further, stop hole 24 is set because become at central part on the sidewall 20 of same phase place with the location indentations 23 of the circumferencial direction of interior all lip parts 22, thus can with the position of stop hole 24 in the sidewall 20 further to inner circumference one side setting.Is being effective with this aspect the miniaturization of device integral body.

Because need not come locating pair gear 6 and rotatingshaft 4 by existing pin, and only prevent to come off,, can omit the pin of high price, thereby can reduce cost so manufacturing and assembling become easily with spring ring 15.

Make break 7 because utilize iron plate etc. to carry out drawing, so weight can be lighter, compare with existing cutting and can be very easy to be shaped, its result can reduce cost.And utilize with inner circumference 22 be pressed into rotatingshaft 4 the end, rotatingshaft 4 and break 7 can be fitted together in advance, can improve operability.

The present invention is not limited to the foregoing description in addition, can carry out all distortion, for example, in the embodiments of the invention, be on the part of peripheral outer lips 21 and sidewall 20,, form rectangle block portion by from both side edges incision otch, again with this rectangle block portion in the form that is bent into than the more inner all sides of peripheral outer lips 21 place with the axis parallel of rotatingshaft 4, form guide portion 25.But also can similarly form guide portion 25 from interior all flange 22 1 sides.

Claims

1. device that prevents gear noise, between adjacent master gear that sets and pinion, be provided with phase difference, and torsion-coil spring is installed in and break and pinion that above-mentioned rotatingshaft unitary rotation ground is provided with between, utilize this torsion-coil spring to separate the direction that disappears and give pinion with rotation potential energy along above-mentioned phase difference, apply preload in view of the above, thereby reduce and the gear meshing noise that matches, it is characterized in that the guide portion that will be used to support the inner circumferential side of above-mentioned torsion-coil spring is located at above-mentioned break.

2. the device of putting down in writing as claim 1 that prevents gear noise is characterized in that, the interval of establishing guide sections and break is taken as D, and the linear diameter of torsion-coil spring is taken as d, then D＜2d.