CN100404897C - Power transmission mechanism of shaft and hub - Google Patents
Power transmission mechanism of shaft and hub Download PDFInfo
- Publication number
- CN100404897C CN100404897C CNB200480022701XA CN200480022701A CN100404897C CN 100404897 C CN100404897 C CN 100404897C CN B200480022701X A CNB200480022701X A CN B200480022701XA CN 200480022701 A CN200480022701 A CN 200480022701A CN 100404897 C CN100404897 C CN 100404897C
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- axle
- tooth portion
- hub
- footstalk
- tooth
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D2001/103—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via splined connections
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
A power transmission mechanism of a shaft and a hub, wherein a shaft tooth part (22) having a plurality of linear spline teeth (20) is formed at the end part of the shaft (12) and a hub tooth part (28) having a plurality of linear spline teeth (26) fitted to the end part of the shaft (12) is formed in the inner peripheral surface of a shaft hole (16) in the hub (14). A first step part (30) is formed by swelling the shaft tooth part (22) toward the hub tooth part (28) from a point (P1) horizontally moved from the center point (P0) of the shaft tooth part (22) to a shaft shank (24) side. On the ridge part (28a) side of the hub tooth part (28), a point (P2) is set at a position offset from the point (P1) horizontally to the opposite side of the shaft shank (24), and a second step part (32) increased in diameter from the point (P2) in the radial outer direction is formed.
Description
Technical field
The present invention relates to a kind of power transmission mechanism that is used between two parts that comprise axle and hub, transmitting reposefully torque.
Background technique
On motor vehicle, use one group of constant velocity universal joint to be transferred to axletree by axle from the driving force of motor such as automobile.Each constant velocity universal joint include exterior part, inner piece and be located at exterior part and inner piece between be used between this exterior part and inner piece the torque transfer parts of transmission torque.Constant velocity universal joint comprises the axle/hub unit with tooth assembly, and this tooth assembly comprises the hub tooth portion on axle tooth portion and the hub on the axle, and this tooth portion and hub tooth portion keep being engaged with each other.
In recent years, required to make great efforts to reduce the circular gap of the constant velocity universal joint that causes owing to trembling of dynamic transfer system.So far, carried out reducing the trial in the gap between interior ring and the axle by constant velocity universal joint with the axle sawtooth that tilts with torsion angle.In the mechanical strength of ring and axle and working life according to the direction of the direction of torsion angle and torsion load and may be different between product and product.
In the gear technique field, for example in the flat No.2-62461 of Japan Patent Publication Laid-Open, the flat No.3-69844 of Japan Patent Publication Laid-Open and the flat No.3-32436 of Japan Patent Publication Laid-Open, disclose and be used for swelling the technological concept of (crown) flank of tooth.
The application's claimant has proposed a kind of splined shaft, wherein swell the position of top stress minimum when being located at torque and being applied on the zone that splined shaft and constant velocity universal joint be engaged with each other, thereby prevent that stress from concentrating on some zone and simplifying the overall structure (referring to Japan Patent Publication Laid-Open No.2001-287122) of splined shaft.
Summary of the invention
Problem to be solved by this invention
Roughly purpose of the present invention provides a kind of power transmission mechanism that is used for axle and hub, and it is used to prevent that stress from concentrating on some zone, thereby increases static mechanical strength and fatigue strength.
The means of dealing with problems
According to the present invention, when applying torque on the part that its axis tooth portion between axle and hub and hub tooth portion keep being engaged with each other, the external diameter of the paddy portion of the axle tooth portion by increasing region of stress concentration can make stress disperse and improve the intensity of axle.
In addition, according to the present invention, because the change point of the change point of the paddy portion external diameter of a tooth portion and the peak portion internal diameter of hub tooth portion is offset intended distance each other, the stress that therefore is applied in the tooth portion is dispersed to a change point and another change point, thereby it is concentrated to relax stress.As a result, relax and disperseed stress to concentrate, thereby increased the static mechanical strength and the fatigue strength in the zone that axle tooth portion and hub tooth portion be engaged with each other.
Description of drawings
Fig. 1 is the fragmentary perspective cross sectional view that is combined with according to the axle/hub unit of the power transmission mechanism of first embodiment of the invention;
Fig. 2 is illustrated in the axle/hub unit shown in Fig. 1 the part amplification transverse sectional view that keeps the axle tooth portion that is engaged with each other and hub tooth portion;
Fig. 3 is along the axial local longitudinal sectional view that amplifies, and expression is bonded on the peak portion of the hub tooth portion in the paddy portion of axle tooth portion as shown in Figure 1;
Fig. 4 is the local longitudinal sectional view that amplifies, and is illustrated in the wedge-shaped surface of first stepped region that tilts with less inclination angle [theta] of the axle shown in Fig. 3;
Fig. 5 amplifies longitudinal sectional view for the part of the tooth of expression axle tooth portion, and the external diameter of this tooth changes towards the footstalk of the axle shown in Fig. 4;
Fig. 6 is the chart of the relation between inclination angle [theta], stress mitigation and the productivity of first stepped region of expression axle tooth portion;
Fig. 7 for expression for axle that wherein in axle tooth portion and hub tooth portion, does not form first stepped region and second stepped region and the axle that wherein in axle tooth portion and hub tooth portion, formed first stepped region and second stepped region, the plotted curve of the relation between the position of the stress that produces on this and measurement stress;
The axle that Fig. 8 tilts with small inclination θ more for first stepped region wherein for expression, the plotted curve of the relation between the position of the stress that produces on this and measurement stress;
The diameter that Fig. 9 changes point and hub tooth portion for expression for the diameter of its axis tooth portion change point each other the diameter of the axle of skew and its axis tooth portion diameter that changes point and hub tooth portion change the some axle of non-migration each other, the plotted curve of the relation between the position of the stress of generation on this and measurement stress;
The plotted curve of the relation between the stress that Figure 10 is producing on the axle when the input load that acts on when applying torque produces stress for expression and the position of measurement stress;
Longitudinal sectional view is amplified in the part that Figure 11 gets for the line XI-XI along Fig. 3 cuts open;
Longitudinal sectional view is amplified in the part that Figure 12 gets for the line XII-XII along Fig. 3 cuts open;
Figure 13 is the amplification longitudinal sectional view of a modification, and the spline tooth in its axis tooth portion and the hub tooth portion is an involute shape;
Figure 14 is the fragmentary perspective cross sectional view that is combined with according to the axle/hub unit of the power transmission mechanism of second embodiment of the invention;
Figure 15 is along the axial local longitudinal sectional view that amplifies, and expression is bonded on the peak portion of the hub tooth portion in the paddy portion of the axle tooth portion shown in Figure 14;
Figure 16 is the local longitudinal sectional view that amplifies, and expression does not have skew ground vertical alignment each other as the some P1 of the starting point that is formed on the arcuate segments in the tooth portion and as the some P2 that is formed on the starting point of the stepped region in the hub tooth portion;
Figure 17 for expression for axle that wherein in hub tooth portion, does not form stepped region and the axle that wherein in axle tooth portion, forms arcuate segments, the plotted curve of the relation between the position of the stress that produces on this and measurement stress;
Longitudinal sectional view is amplified in the part that Figure 18 gets for the line XVIII-XVIII along Figure 15 cuts open;
Longitudinal sectional view is amplified in the part that Figure 19 gets for the line XIX-XIX along Figure 15 cuts open;
Figure 20 is the fragmentary perspective cross sectional view that is combined with according to the axle/hub unit of the power transmission mechanism of third embodiment of the invention;
Figure 21 is along the axial local longitudinal sectional view that amplifies, and expression is bonded on the peak portion of the hub tooth portion in the paddy portion of the axle tooth portion shown in Figure 20;
Figure 22 is the local longitudinal sectional view that amplifies, and represents the tooth of its external diameter towards the axle tooth portion of the footstalk variation of the axle shown in Figure 21;
Figure 23 is the chart of the relation between lift angle θ, stress mitigation and the productivity of the tapered region of expression axle tooth portion;
Figure 24 for expression for the axle that wherein in axle tooth portion and hub tooth portion, does not form tapered region and stepped region and wherein tapered region and stepped region are not offset the axle of formation, the plotted curve of the relation between the position of the stress that produces on this and measurement stress;
Figure 25 for expression for axle that wherein in axle tooth portion and hub tooth portion, does not form tapered region and stepped region and the axle that is offset each other of the starting point of tapered region and stepped region wherein, the plotted curve of the relation between the position of the stress that produces on this and measurement stress;
The diameter that Figure 26 changes point and hub tooth portion for expression for the diameter of its axis tooth portion change point each other the diameter of the axle of skew and its axis tooth portion diameter that changes point and hub tooth portion change the unmigrated each other axle of point, the plotted curve of the relation between the position of the stress of generation on this and measurement stress;
Longitudinal sectional view is amplified in the part that Figure 27 gets for the line XXVII-XXVII along Figure 21 cuts open;
Longitudinal sectional view is amplified in the part that Figure 28 gets for the line XXVIII-XXVIII along Figure 21 cuts open;
Figure 29 is the fragmentary perspective cross sectional view that is combined with according to the axle/hub unit of the power transmission mechanism of fourth embodiment of the invention;
Figure 30 is along the axial local longitudinal sectional view that amplifies, and expression is bonded on the peak portion of the hub tooth portion in the paddy portion of the axle tooth portion shown in Figure 29;
Figure 31 is the local longitudinal sectional view that amplifies, and is illustrated in first tapered region that has small inclination θ in the stepped region of the axle shown in Figure 30;
Figure 32 is along the axial local longitudinal sectional view that amplifies, and is illustrated in being coupling shown in the hub that has second tapered region in the hub tooth portion and Figure 31 and closes;
Figure 33 is along the axial local longitudinal sectional view that amplifies, and is illustrated in being coupling shown in the hub of the arc that has predetermined bend radius in the hub tooth portion and Figure 31 and closes;
Figure 34 is the local longitudinal sectional view that amplifies, the tooth that the external diameter of expression axle tooth portion changes towards the footstalk of the axle shown in Figure 31;
The chart that concerns between inclination angle [theta], stress mitigation and the productivity of Figure 35 for the stepped region of expression axle tooth portion;
Longitudinal sectional view is amplified in the part that Figure 36 gets for the line XXXVI-XXXVI along Figure 30 cuts open;
Longitudinal sectional view is amplified in the part that Figure 37 gets for the line XXXVII-XXXVII along Figure 30 cuts open; And
Figure 38 forms an exploded perspective view of the mode of the spline tooth of tooth portion for expression by the gear rolling bar.
Embodiment
Fig. 1 represents to be combined with the axle/hub unit 10 according to the power transmission mechanism of first embodiment of the invention.Axle/hub unit 10 is as the part of constant velocity universal joint.Axle/hub unit 10 comprises as the axle 12 of power transmission shaft with as the hub 14 of interior ring, and this hub 14 is located in the opening of outer cup part (not shown) and has the direction recess 15 that holds the spheroid (not shown) therein.
Fig. 3 is bonded among the 22b of paddy portion of a tooth portion 22 with the 28a of peak portion that the axial part amplification longitudinal sectional view along axle 12 shows hub tooth portion 28.In Fig. 3, represent by P0 corresponding to the position of the axial centre point of axle tooth portion 22.
Position set point P1 (change point) on the bottom surface of the 22b of paddy portion, the mid point P0 of this position axle tooth portion 22 of (the radius φ A1 of paddy portion) from the bottom surface of the 22b of paddy portion moves horizontally intended distance L1 towards footstalk 24.Rising towards hub tooth portion 28 radially outwards from a P1 in the bottom of paddy portion 22, forms to have first stepped region 30 of the radius φ A2 of paddy portion.First stepped region 30 combines towards footstalk 24 horizontal-extending intended distance L2 and with footstalk 24.
First stepped region 30 of axle tooth portion 22 can have inclined surface or have the arc-shaped bend surface or the combining surface of predetermined bend radius.
The 22a of peak portion of axle tooth portion 22 has can be along the external diameter that axially remains unchanged, and as shown in Figure 3 and Figure 4, perhaps this external diameter can reduce towards footstalk 24 gradually from the zone of points of proximity P1, as shown in Figure 5.Reduce gradually towards footstalk 24 by the external diameter that makes the 22a of peak portion, can easily use the roll extrusion tooth bar to process a tooth portion 22 (as described below), and can not reduce the function of a tooth portion 22 transmission torques.In Fig. 5, reference character " H " expression changes the horizontal line that (reducing) compares with the external diameter of the 22a of peak portion.
On the 28a of peak portion of hub tooth portion 28, at the some P1 from axle tooth portion 22 along the position set point P2 of substantially horizontal away from footstalk 24 skew intended distance L4.The 28a of peak portion makes the radius φ A3 of its peak portion change to the radius φ A4 of peak portion from a P2, forms to have second stepped region 32 of the radius φ A4 of peak portion.Second stepped region 32 is towards footstalk 24 horizontal-extending intended distance L3.
Second stepped region 32 of hub tooth portion 28 can have inclined surface or have the arc-shaped bend surface or the combining surface of predetermined bend radius, and can have the shape different with first stepped region 30.The inclination angle that can set second stepped region 32 by expectation with the inclination angle complementation of first stepped region 30.The shape of hub tooth portion 28 is not limited to the shape of second stepped region 32, but can comprise circle with predetermined bend radius, wedge shape etc.The 28b of paddy portion of hub tooth portion 28 has the internal diameter that remains unchanged.
The radius φ A1 of paddy portion, φ A2 represent from the medial axis of axle 12 to the respective distance of the bottom surface of the 22b of paddy portion of axle tooth portion 22.The radius φ A3 of peak portion, φ A4 represent from the medial axis of axle 12 to the respective distance of the end face of the 28a of peak portion of paddy tooth portion 28.
Distance L 2 in the axle tooth portion 22 can be set at value greater than the distance L 1 in the axle tooth portion 22 (L1＜L2).Distance L 3 in distance L 2 in the axle tooth portion 22 and the hub tooth portion 22 can be set at value (L2 ≈ L3) about equally, perhaps the distance L 3 in the hub tooth portion 22 can be set at value greater than the distance L 2 in the axle tooth portion 22 (L2＜L3), allowing easily to form skew (illustrating after a while), and also improved the simplification that axle 12 and hub 14 are assembled together according to tolerance of size and dimensional accuracy.In Fig. 3, distance L 2 and distance L 3 accurately are not plotted as actual size.
As can be seen from Figure 3, the some P2 of the some P1 of the starting point (change point) that begins to rise as first stepped region 30 of axle tooth portion 22 and the starting point (change point) that begins to rise as second stepped region 32 of hub tooth portion 28 approximate horizontal skew intended distance L4 each other.
Therefore, when applying torque on the axle/hub unit 10 that axle tooth portion 22 and hub tooth portion 28 are engaged with each other therein, because some P1 in the axle tooth portion 22 and the some P2 in the hub tooth portion 28 be offset distance L4 each other, therefore the stress that is applied on the axle/hub unit 10 is dispersed to a P1, P2, concentrates thereby relaxed stress.As a result, the static mechanical strength and the fatigue strength in the zone that axle tooth portion 22 and hub tooth portion 28 be engaged with each other have been increased.
In Fig. 4, can make by putting the section area increase of the right-angled triangle that P1, P3, P4 interconnection forms, and the angle θ that forms between can the line segment P13 with the line segment P14 of interconnection point P1, P4 and interconnection point P1, P3 (promptly, the inclination angle [theta] of first stepped region 30) is set at smaller value, is used for concentrating by the wedge-shaped surface 34 further stress that relax of first stepped region 30.
Relation between the inclination angle [theta] of first stepped region 30, stress mitigation and the productivity as shown in Figure 6.As can be seen from Figure 6, if inclination angle [theta] is set at the value of spending in the 45 degree scopes 5, then stress relaxes and productivity good (index mark " zero "), and if inclination angle [theta] is set at the value of spending in the 35 degree scopes 10, then stress relaxes and productivity the best (index mark " ◎ ").
If inclination angle [theta] is set at 3 degree, does not then have enough stress dispersibilities to use, thereby be difficult to describe after a while with roll extrusion tooth bar processing axle tooth portion 22.If inclination angle [theta] is set at 90 degree, overstress then can take place on first stepped region 30 to be concentrated, be used for the serviceability of roll extrusion tooth bar of a tooth portion 22 that processes thereby reduced.
Fig. 7 represents the stress characteristic curve B (block curve) on stress characteristic curve A (dashed curve) on the comparison axle and, in described relatively axle, in axle tooth portion 22 and hub tooth portion 28, do not form first stepped region 30 and second stepped region 32, and in described axle, the inclination angle [theta] that some P1, P2 are offset the intended distance L4 (shown in Figure 4) and first stepped region 30 each other is set to higher value.Comparison shows that between characteristic curve A and the characteristic curve B, the indicatrix B according to structure shown in the presentation graphs 4 has reduced peak stress, and makes stress concentrate mitigation.
Fig. 8 represents that the inclination angle [theta] of first stepped region 30 wherein is than the stress characteristic curve C on the little axle in the inclination angle with characteristic curve B.As can be seen from Figure 8, increase the size of wedge-shaped surface 34 by reducing inclination angle [theta], then this wedge-shaped surface 34 can further relax stress (the part β of the part α of the characteristic curve B shown in the comparison diagram 7 and the characteristic curve C shown in Fig. 8).
Fig. 9 represents that some P1 in its axis tooth portion 22 and the some P2 in the hub tooth portion 28 are offset the stress characteristic curve E (block curve) on the axle of intended distance each other, and its mid point P1, the P2 stress characteristic curve F (dashed curve) on the axle of non-migration (that is, P1, P2 the distance of horizontal interval be zero) each other each other.
Comparison shows that of Offset portion and non-migration part (referring to the part γ of characteristic curve E, F), wherein the characteristic curve E of the axle that be offset each other of starting point P1 in axle tooth portion 22 (seeing Fig. 3 and Fig. 4) and the starting point P2 in hub tooth portion 28 (seeing Fig. 3 and Fig. 4) compares wherein starting point P1, P2 the characteristic curve F of non-migration is milder each other.Skew starting point P1, P2 are effective to relaxing stress in the zone of change in radius.
The mode that Fig. 2 is engaged with each other when being illustrated under the uncharged state of the straight peak 28a of portion of the straight peak 22a of portion that keeps the axle tooth portion 22 be engaged with each other and hub tooth portion 28 it being applied torque.Suppose that when applying torque on the 22a of peak portion, 28a load is along being applied in these peak portions by the represented direction of arrow Y, this direction is hung down as for the axis of axle tooth portion 22.
Figure 10 is illustrated in the relation (referring to the arrow X among Fig. 2) between stress that produces on the axle and the position of the measuring stress.If the size of imposed load is through three phases, promptly low load, middle load and high loading and change, then as can be seen, the peak stress point is positioned at roughly the same measuring position D, as corresponds respectively to shown in the low load character curve in above-mentioned stage, middle load character curve and high loading characteristic some a, b, the c.
Figure 11 and Figure 12 are the local longitudinal sectional view that amplifies, and are illustrated in the mode of the 22b of paddy portion that axle 12 and hub 14 are assembled in the 28a of the peak portion engagement shaft tooth portion 22 of a time-out hub tooth portion 28.In Figure 11 and Figure 12, φ d1 to φ d3 represents from the Pitch radius of the medial axis of axle 12.
Because axle tooth portion 22 shapes are straight and hub tooth portion 28 shapes are straight, therefore the side surface of axle tooth portion 22 and hub tooth portion 28 remains to face each other and contacts (referring to Fig. 2,11 and 12).
From between Figure 11 and Figure 12 more as can be known, can be by forming first stepped region 30 (referring to Fig. 3) in axle tooth portion 22 and hub tooth portion 28 near the part of footstalk 24 and second stepped region 32 (referring to Fig. 3) makes radius φ d2, the φ d3 of the tooth portion 22 in the region of stress concentration increase α.
Because radius φ d2, the φ d3 of the axle tooth portion 22 in the region of stress concentration have increased α, therefore can make the radius of curvature R increase of bottom surface of the 22b of paddy portion of a tooth portion 22 be used for stress and disperse (referring to the R ' of Figure 12).Can reduce total stress (principal stress) than other regional radius by the zone that increases near footstalk 24.
Figure 11 can have and involute shape the same shown in Figure 13 with hub tooth portion with the axle tooth portion shown in Figure 12.In Figure 13, the axle tooth 22c of axle tooth portion 22 and the hub tooth 28c of hub tooth portion 28 contact with each other on benchmark pitch diameter T.Therefore, can easily axle 12 and hub 14 be processed into a tooth portion 22 and hub tooth portion 28 respectively by rack cutter, and can make a tooth portion 22 and hub tooth portion 28 mesh joint each other reposefully.
According to this first embodiment, as mentioned above, as the some P1 of the starting point of first stepped region 30 of axle 12 with as the some P2 of the starting point of second stepped region 32 of hub 14 approximate horizontal offset distance L4 each other.
Therefore, when applying torque on the axle/hub unit 10 that axle tooth portion 22 and hub tooth portion 28 are engaged with each other therein, the stress that is applied on the axle/hub unit 10 is dispersed to a P1, P2, concentrates thereby relaxed stress.Therefore, axle tooth portion 22 and hub tooth portion 28 the be engaged with each other static mechanical strength and the fatigue strength in zone have been increased.
In addition, be set in 5 values of spending in the 45 degree scopes by the inclination angle [theta] with the starting point P1 place of first stepped region 30, the wedge-shaped surface 34 of first district's stepped region 30 can further relax stress and concentrate.
By the hub 14 in axle 12 that is used as power transmission shaft and the exterior part that is contained in constant velocity universal joint as inner piece, when torque by when power transmission shaft is transferred to hub 14, concentrate on the stress that axle 12 and hub 14 be engaged with each other on the zone and suitably relaxed, thereby driving force is transferred to reliably the exterior part of constant velocity universal joint.
Figure 14 represents to be combined with the axle/hub unit 100 according to the power transmission mechanism of second embodiment of the invention.Figure 15 amplifies the 28a of peak portion that longitudinal sectional view is represented the hub tooth portion 28 among the 22b of paddy portion of a tooth portion 22 that is bonded on the axial part along axle 12.
In the following embodiment that will describe, those of axle/hub unit with represent by identical reference character according to the identical parts of first embodiment's axle/hub unit 10, and no longer be described in detail.No longer describe below and those parts identical according to first embodiment's mode of operation and that have same advantage.
As shown in figure 15, the position set point P1 on the bottom surface of the 22b of paddy portion (the radius φ B1 of paddy portion), this position moves horizontally intended distance L1 from the mid point P0 of axle tooth portion 22 towards footstalk 24.Arcuate segments 130 combines towards 28 extensions of hub tooth portion and with footstalk 24 from a P1, and this arcuate segments 130 has radius of curvature G.In other words, the some P3 that arcuate segments 130 is centered around on the baseline H forms, and this baseline H is approximately perpendicular to hub tooth portion 28 from a P1 and extends.Under the mid point P3 of arcuate segments 130 was positioned at situation on the baseline H, arcuate segments 130 can have any radius of curvature arbitrarily.
Position set point P2 on the 28a of peak portion of hub tooth portion 28, this position is along the some P1 skew intended distance L2 of substantially horizontal from axle tooth portion 22 away from footstalk 24.The 28a of peak portion changes to the radius φ B3 of peak portion from a P2 with the radius φ B2 of its peak portion, forms to have the stepped region 132 of the radius φ B3 of peak portion.This stepped region 132 is towards footstalk 24 horizontal-extending intended distance L3.
The stepped region 132 of hub tooth portion 28 is away from axle tooth portion 22 withdrawal, and can have inclined surface or have the arc-shaped bend surface or the combining surface of predetermined bend radius.Can set the inclination angle that stepped region 132 originate in a P2 by expectation, with the inclination angle complementation in arc shape district 130.
The shape of hub tooth portion 28 is not limited to the shape of stepped region 132, but can comprise shapes such as circle with predetermined bend radius, wedge shape.The 28b of paddy portion of hub tooth portion 28 has the internal diameter that remains unchanged.The external diameter of the 22a of peak portion of axle tooth portion 22 can be along axially remain unchanged (as Figure 15 and shown in Figure 16), and perhaps this external diameter can reduce (as shown in Figure 5) towards footstalk 24 gradually from the zone of points of proximity P1.
The radius φ B1 of paddy portion represents from the medial axis of axle 12 to the distance of the bottom surface of the 22b of paddy portion of axle tooth portion 22.The radius φ B2 of peak portion, φ B3 represent from the medial axis of axle 12 to the respective distance of the end face of the 28a of peak portion of hub tooth portion 28.
As can be seen from Figure 15, the some P2 of the some P1 of the starting point that begins to rise as the arcuate segments 130 of axle tooth portion 22 and the starting point that begins to rise as the stepped region 132 in the hub tooth portion 28 approximate horizontal skew intended distance L2 each other.
Therefore, when applying torque on the axle/hub unit 100 that axle tooth portion 22 and hub tooth portion 28 are engaged with each other therein, because some P1 in the axle tooth portion 22 and the some P2 in the hub tooth portion 28 be offset distance L2 each other, the stress that is applied on the axle/hub unit 100 is dispersed on regional a0, the a1 in the tooth portion 22 by arcuate segments 130, and stress is concentrated and the reduction peak stress thereby relax.The result has increased axle tooth portion 22 and hub tooth portion 28 the be engaged with each other static mechanical strength and the fatigue strength in zone.
As shown in figure 16, P1, P2 can be perpendicular to one another alignment and not have skew each other.By this structure, arcuate segments 130 in the axle tooth portion 22 and the stepped region 132 in the hub tooth portion 28 be cooperation with each other when disperseing to be applied to the stress on the arcuate segments 130 and relaxing stress to concentrate.
Figure 17 represents the stress characteristic curve K (block curve) on stress characteristic curve J (dashed curve) on the comparison axle and, in this comparison axle, do not form stepped region 132 in the hub tooth portion 28, and in described axle, point P1, P2 are offset intended distance each other, and formation has the stepped region 132 of starting point P2 in hub tooth portion 28.
Comparison shows that between characteristic curve J and the characteristic curve K, according to the characteristic curve K in structure shown in Figure 15, peak stress is dispersed to regional a0, a1, and therefore reduces in regional a1.Particularly, although the stress among the regional a0 of the stress ratio characteristic curve J in the regional a0 of characteristic curve K is big, but, therefore reduced the maximum stress peak value that in axle 12, produces because the maximum stress among the regional a1 of the maximum stress ratio characteristic curve J among the regional a1 of characteristic curve K is little.
Put therein on the axle that P1, P2 be offset certain distance each other stress with put therein P1, P2 each other non-migration (that is, P1, P2 the distance of horizontal interval be zero) each other spool on stress with identical at the stress of characteristic curve E, the F shown in Fig. 9 according to first embodiment.Therefore, the characteristic curve E that represents the axle that its mid point P1, P2 be offset each other than represent its mid point P1, P2 each other non-migration spool characteristic curve F more mild.Skew starting point P1, P2 are effective in the stress that relaxes the change in radius district.
If the size of imposed load is through three phases, promptly change through low load (dashed curve), middle load (dot and dash line curve) and high loading (block curve), then identical (referring to Figure 10) with first embodiment, correspond respectively to the characteristic peak stress point of the low load character curve in above-mentioned stage, middle load character curve and high loading and be positioned at roughly the same measuring position D, shown in an a, b, c.
Figure 18 and Figure 19 are the local longitudinal sectional view that amplifies, and are illustrated in the mode of the 22b of paddy portion that axle 12 and hub 14 are assembled in the 28a of the peak portion engagement shaft tooth portion 22 of a time-out hub tooth portion 28.The operation of axle/hub unit 100 and advantage are identical with operation and advantage according to first embodiment's axle/hub unit 10, therefore are not described in detail below.
According to this second embodiment, as the some P1 of the starting point of the arcuate segments 130 of axle 12 with as the some P2 of the starting point of the stepped region 132 of hub 14 approximate horizontal offset distance L2 each other.
Therefore, when applying torque on the axle/hub unit 100 that axle tooth portion 22 and hub tooth portion 28 are engaged with each other therein, the stress that is applied on the axle/hub unit 100 is distributed to regional a0, a1 in the tooth portion 22 by arcuate segments 130, concentrates and reduces peak stress among the regional a1 thereby relax stress.Therefore, concentrate, therefore increased the static mechanical strength and the fatigue strength in the zone that axle tooth portion 22 and hub tooth portion 28 be engaged with each other owing to relaxed stress.
Figure 20 represents to be combined with the axle/hub unit 200 according to the power transmission mechanism of third embodiment of the invention.Figure 21 represents that to amplify longitudinal sectional view along the axial part of axle 12 28a of peak portion of hub tooth portion 28 is bonded among the 22b of paddy portion of a tooth portion 22.
Position set point P1 on the bottom surface of the 22b of paddy portion, the mid point P0 of footstalk portion 22 is gone up towards footstalk 24 slipping intended distance L1 from the bottom surface (the radius φ C1 of paddy portion) of the 22b of paddy portion in this position.The bottom surface radius of the 22b of paddy portion increases towards hub tooth portion 28 gradually from a P1, forms the tapered region 230 of θ inclination at a predetermined angle.Tapered region 230 combines towards footstalk 24 extensions and with it.
The 22a of peak portion of axle tooth portion 22 has can be along the external diameter that axially remains unchanged (as shown in figure 21), and perhaps this external diameter can reduce (as shown in figure 22) towards footstalk 24 gradually from the zone of points of proximity P1.
Reduce gradually towards footstalk 24 by the external diameter that makes the 22a of peak portion, can easily process a tooth portion 22 (will describe after a while), and can not reduce the function of a tooth portion 22 transmission torques by the roll extrusion tooth bar.In Figure 22, reference character " H " expression changes the horizontal line that (reducing) compares with the external diameter of the 22a of peak portion.
On the 28a of peak portion of hub tooth portion 28, at a position set point P2, the some P1 of this position from axle tooth portion 22 is along the substantially horizontal skew intended distance L2 away from footstalk 24.The 28a of peak portion makes the radius φ C2 of its peak portion change into the radius φ C3 of peak portion from a P2, forms to have the stepped region 232 of the radius φ C3 of peak portion.This stepped region 232 is towards footstalk 24 horizontal-extending intended distance L3.
The stepped region 232 of hub tooth portion 28 can have inclined surface or have the arc-shaped bend surface or the combining surface of predetermined bend radius.Can set the inclination angle that stepped region 232 originate in a P2 by expectation, with the inclination angle [theta] complementation of tapered region 230.The shape of hub tooth portion 28 is not limited to the shape of stepped region 232, but can comprise shapes such as circle with predetermined bend radius, wedge shape.The 28b of paddy portion of hub tooth portion 28 has the internal diameter that remains unchanged.
The radius φ C1 of paddy portion represents from the medial axis of axle 12 to the distance of the bottom surface of the 22b of paddy portion of axle tooth portion 22.The radius φ C2 of peak portion, φ C3 represent from the medial axis of axle 12 to the respective distance of the end face of the 28a of peak portion of hub tooth portion 28.
As can be seen from Figure 21, the some P2 of the some P1 of the starting point that begins to rise as the straight tapered region 230 of axle tooth portion 22 and the starting point that begins to rise as the stepped region 232 in the hub tooth portion 28 approximate horizontal skew intended distance L2 each other.
Therefore, when applying torque on the axle/hub unit 200 that axle tooth portion 22 and hub tooth portion 28 are engaged with each other therein, because some P1 in the axle tooth portion 22 and the some P2 in the hub tooth portion 28 be offset distance L2 each other, therefore make the stress that is applied on the axle/hub unit 200 be distributed to a P1, P2, concentrate thereby relax stress.As a result, axle tooth portion 22 and hub tooth portion 28 the be engaged with each other static mechanical strength and the fatigue strength in zone have been increased.
By making the lift angle θ of tapered region 230 less, further relax stress as the area on stress surface thereby can increase tapered region 230.
Relation between the lift angle θ of tapered region 230, stress mitigation and the productivity is shown in Figure 23.As can be seen from Figure 23, if lift angle θ is set at the value of spending in the 65 degree scopes 6, then the stress mitigation is good (index mark " zero ") with productivity, if and lift angle θ is set at the value of spending in 30 scopes 10, then stress relaxes and productivity the best (index mark " ◎ ").
If lift angle θ is set at the value of spending less than 6, does not then have enough stress dispersibilities to use.If lift angle θ is set at the value of spending greater than 65, then can not adopts the cheap rolling technology (will describe after a while) that uses the roll extrusion tooth bar, thereby productivity is reduced.
Figure 24 represents wherein not form stress characteristic curve M (dashed curve) on the comparison axle of tapered region 230 and stepped region 232 and its mid point P1, P2 non-migration each other in axle tooth portion 22 and hub tooth portion 28, but the alignment and be formed with stress characteristic curve N (block curve) on the axle of stepped region 232 of being perpendicular to one another.As can be seen from Figure 24, according to representing its mid point P1, the P2 characteristic curve N of the axle of non-migration each other, reduced peak stress, and stress concentrate than expression relatively axle characteristic curve M a little less than, but concentrate big (referring to the part α among Figure 24) at a P1, the P2 region aligned upper stress that is perpendicular to one another.
In Figure 25, characteristic curve Q represents to have the stress on the axle of structure as shown in figure 21, wherein in axle tooth portion 22 and hub tooth portion 28, be formed with tapered region 230 and stepped region 232 respectively, and as the P1 of the starting point of tapered region 230 with as the some P2 of the starting point of stepped region 232 slipping intended distance L2 each other.As can be seen from Figure 25, according to characteristic curve Q, put stress (referring to the part β among Figure 25) beguine in the zone that P1, P2 be offset each other therein according to its mid point of expression P1, P2 each other a little less than the characteristic curve M of the structure of non-migration.
Figure 26 represents that some P1 in its axis tooth portion 22 and the some P2 in the hub tooth portion 28 are offset the stress characteristic curve R (block curve) on the axle of intended distance each other, and its mid point P1, the P2 stress characteristic curve S (dashed curve) on the axle of non-migration (that is, P1, P2 the distance of horizontal interval be zero) each other each other.
The comparison (referring to the part γ among Figure 26) of Offset portion and non-migration part shows, the characteristic curve N of non-migration is more mild each other than wherein starting point P1, P2 for the characteristic curve M of the axle that starting point P1 in its axis tooth portion and the starting point P2 in the hub tooth portion are offset each other.Skew starting point P1, P2 are effective in the stress that relaxes the change in radius district.
Identical with first embodiment (referring to Figure 10) corresponds respectively to the characteristic peak stress point of the low load character curve in above-mentioned stage, middle load character curve and high loading and is positioned at roughly the same measuring position D, shown in an a, b, c,
Figure 27 and Figure 28 are the local longitudinal sectional view that amplifies, and are illustrated in the mode of the 22b of paddy portion that axle 12 and hub 14 are assembled in the 28a of the peak portion engagement shaft tooth portion 22 of a time-out hub tooth portion 28.The operation of axle/hub unit 200 and advantage are identical with operation and advantage according to first embodiment's axle/hub unit 10, therefore no longer are described in detail.Axle tooth portion and hub tooth portion can have involute shape as shown in figure 13.
According to the 3rd embodiment, as the some P1 of the starting point of the tapered region 230 of axle 12 with as the some P2 of the starting point of the stepped region 232 of hub 14 approximate horizontal offset distance L2 each other.
Therefore, when applying torque on the axle/hub unit 200 that axle tooth portion 22 and hub tooth portion 28 are engaged with each other therein, the stress that is applied on the axle/hub unit 200 is dispersed to a P1, P2, concentrates thereby relax stress.As a result, axle tooth portion 22 and hub tooth portion 28 the be engaged with each other static mechanical strength and the fatigue strength in zone have been increased.
By the hub 14 in axle 12 that is used as power transmission shaft and the exterior part that is contained in constant velocity universal joint as inner piece, when torque by when power transmission shaft is transferred to hub 14, concentrate on the stress that axle 12 and hub 14 be engaged with each other on the zone and suitably relaxed, thereby allow driving force is transferred to reliably the exterior part of constant velocity universal joint.
Figure 29 represents to be combined with the axle/hub unit 300 according to the power transmission mechanism of fourth embodiment of the invention.Figure 30 represents that to amplify longitudinal sectional view along the axial part of axle 12 28a of peak portion of hub tooth portion 28 is bonded among the 22b of paddy portion of a tooth portion 22.
As shown in figure 30, the 22b of paddy portion of axle tooth portion 22 has stepped region 330, and this stepped region 330 is towards footstalk 24 horizontal-extending intended distances, and tilts to rise at a predetermined angle from a P1 towards hub tooth portion 28, this P1 from mid point P0 towards footstalk 24 skew intended distances.
Stepped region 330 combines from mid point P2 horizontal-extending intended distance and with footstalk 24.In other words, the radius φ D2 of paddy portion that changes at stepped region 330 places from the radius φ D1 of paddy portion of the radius of axle tooth portion 22 at the 22b of paddy portion.
Stepped region 330 can have inclined surface or have the arc-shaped bend surface or the combining surface of predetermined bend radius.
The 22a of peak portion of axle tooth portion 22 has can be along the external diameter that axially remains unchanged (shown in Figure 30 to 33), and perhaps this external diameter can reduce shown in (as Figure 34) towards footstalk 24 gradually from the zone of points of proximity P1.Reduce gradually towards footstalk 24 by the external diameter that makes the 22a of peak portion, available roll extrusion tooth bar is easily processed a tooth portion 22 (will describe after a while), and can not reduce the function of a tooth portion 22 transmission torques.In Figure 34, reference character " H " expression changes the horizontal line that (reducing) compares with the external diameter of the 22a of peak portion.
The 28a of peak portion of hub tooth portion 28 has the external diameter φ D3 that axially remains unchanged along hub 14, and the 28b of paddy portion of hub tooth portion 28 also has the internal diameter φ D4 that axially remains unchanged along hub 14.
The radius φ D1 of paddy portion, φ D2 represent from the medial axis of axle 12 to the distance of the bottom surface of the 22b of paddy portion of axle tooth portion 22.The radius φ D3 of peak portion represents from the medial axis of axle 12 to the distance of the end face of the 28a of peak portion of hub tooth portion 28.
Therefore, when applying torque on the axle/hub unit 300 that axle tooth portion 22 and hub tooth portion 28 are engaged with each other therein, be applied to stress on the axle/hub unit 300 and be dispersed to hub tooth portion 28, thereby relaxed stress concentrated (referring to Figure 30) in the face of the regional T1 of the some P1 in the axle tooth portion 22 and hub tooth portion 28 a regional T2 place in the face of the stepped region 330 of axle tooth portion 22.
As a result, concentrate, disperseed stress, therefore increased axle tooth portion 22 and hub tooth portion 28 the be engaged with each other static mechanical strength and the fatigue strength in zone owing to relaxed stress.
In Figure 31, section area by the some P1 among the 22b of paddy portion of interconnection axle tooth portion 22, right-angled triangle that P2 ', P3 form is increased, and can will make between line segment P13 and the line segment P12 ' that makes a P1, P2 ' interconnection of a P1, P3 interconnection the angle θ (being the inclination angle [theta] of stepped region 330) of formation be set at smaller value, being used for further first wedge-shaped surface 332 by stepped region 330, to relax stress concentrated.
Relation between the inclination angle [theta] of stepped region 330 (first wedge-shaped surface 332), stress mitigation and the productivity is shown in Figure 35.As can be seen from Figure 35, if inclination angle [theta] is set at the value of spending in the 45 degree scopes 5, then stress mitigation and productivity are well (index mark " zero "), if inclination angle [theta] is set at the value of spending in the 35 degree scopes 10, then stress relaxes and productivity the best (index mark " ◎ ").
If inclination angle [theta] is set at the value of spending less than 5, does not then have enough stress dispersive propertys to use, and be difficult to describe after a while with a roll extrusion tooth bar processing axle tooth portion 22.If inclination angle [theta] is set at the value of spending greater than 45, overstress then can take place on stepped stepped region 330 to be concentrated, thus the feasible serviceability reduction that is used to the roll extrusion tooth bar of a tooth portion 22 that processes.
There is not the plain shaft/hub spline assembly structure of stepped region 330 to have near the peak stress point that footstalk 24, produces.Yet, according to the 4th embodiment, in axle tooth portion 22, be provided with stepped region 330, thereby allow some stress to concentrate in the hub tooth portion 28 in the face of some P1, therefore disperseed to be tending towards concentrating on the stress on the footstalk 24.If the inclination angle [theta] of the stepped region 330 in the axle tooth portion 22 is set at excessive value (for example, 90 degree), then in the face of the hub tooth portion 28 of some P1, can the generation overstress concentrates, thereby can not provide stress to disperse (stress mitigation) ability.Be set at suitable value by inclination angle [theta] (that is, lift angle), can suitably disperse near footstalk 24 stress to concentrate, thereby reduce the stress at peak point place stepped region 332.
Shown in figure 32, in the hub 14a of engages axle tooth portion 22, a P4 can be set at the rising point on the 28a of peak portion of horizontally extending hub tooth portion 28, and second wedge-shaped surface 334 is formed from a P4 towards footstalk 24 diagonally extending at a predetermined angle.Second wedge-shaped surface 334 forms in the face of the some P1 of the starting point of the stepped region 330 in the conduct axle tooth portion 22 and first wedge-shaped surface 332 wherein, and makes its radius be increased to the radius φ D6 of peak portion along the direction away from axle tooth portion 22 from the radius φ D5 of peak portion.
As the some P1 of the starting point of the stepped region 330 in the axle tooth portion 22 (first wedge-shaped surface 332) and as the some P4 of the starting point of second wedge-shaped surface 334 in the hub tooth portion 28 can along axle 12 axially be offset intended distance each other, perhaps putting P1, P4 can be in alignment with each other.By this structure, stepped region 330 in the axle tooth portion 22 and second wedge-shaped surface 334 in the hub tooth portion 28 be cooperation with each other when disperseing to be applied to the stress on second wedge-shaped surface 334 and relaxing stress to concentrate.
Therefore, when axle tooth portion 22 therein with have when applying torque on the axle/hub unit 300 that the hub tooth portion 28 of second wedge-shaped surface 334 is engaged with each other, to be applied to stress on the axle/hub unit 300 by second wedge-shaped surface 334 and be distributed to hub tooth portion 28, thereby stress be concentrated relax and reduced peak stress in the face of the regional U2 of the regional U1 of the some P1 in the axle tooth portion 22 and hub tooth portion 28 in the face of the some P2 ' in the axle tooth portion 22.As a result, first wedge-shaped surface 332 in the hub tooth portion 28 is effective increasing that axle tooth portion 22 and hub tooth portion 28 be engaged with each other in the static mechanical strength in zone and the fatigue strength.
As shown in figure 33, in the hub 14b of engages axle tooth portion 22, a P5 can be set at the rising point on the 28a of peak portion of horizontally extending hub tooth portion 28, and the arcuate surface 336 with predetermined bend radius R be formed from a P5 extend towards footstalk 24.Arcuate surface 336 forms in the face of the some P1 of the starting point of the stepped region 330 in the conduct axle tooth portion 22 and first wedge-shaped surface 332 therein, and away from 22 withdrawals of axle tooth portion.
As the some P1 of the starting point of the stepped region 330 in the axle tooth portion 22 (first wedge-shaped surface 332) and as the some P5 of the starting point of the arcuate surface 336 in the hub tooth portion 28 can along axle 12 axially be offset intended distance each other, perhaps put P1, P5 and be in alignment with each other.By this structure, stepped region 330 in the axle tooth portion 22 and the arc surface region 336 in the hub tooth portion 28 be cooperation with each other when disperseing to be applied to the stress on the arcuate surface 336 and relaxing stress to concentrate.
Therefore, when applying torque on axle/hub unit 300 that axle tooth portion 22 and hub tooth portion 28 are engaged with each other therein, to be applied to stress on the axle/hub unit 300 by arcuate surface 336 and be distributed to hub tooth portion 28, and concentrate and reduced peak stress thereby relaxed stress in the face of the regional V2 of the regional V1 of the some P1 in the axle tooth portion 22 and hub tooth portion 28 in the face of the some P2 ' in the axle tooth portion 22.As a result, the arcuate surface 336 in the hub tooth portion 28 is effective in static mechanical strength that increases the zone that axle tooth portion 22 and hub tooth portion 28 be engaged with each other and fatigue strength.
Wherein in axle tooth portion 22, do not form stress characteristic curve B (block curve) on stress characteristic curve A (dashed curve) and the axle that wherein in axle tooth portion 22, is formed with the stepped region 330 that starts from starting point P1 on the comparison axle of stepped region 330 with identical at the characteristic curve shown in Fig. 7 according to first embodiment.Comparison shows that between characteristic curve A and the characteristic curve B as can be known, the characteristic curve B that has the structure of stepped region 330 according to expression has reduced peak stress and has relaxed stress and concentrated.
Wherein the inclination angle [theta] of stepped region 330 less than have characteristic curve B the axle on stress characteristic curve C with identical at the characteristic curve shown in Fig. 8 according to first embodiment.First wedge-shaped surface 332 that has less inclination angle [theta] as can be known is effective in further stress relaxes.
The same with first embodiment (referring to Figure 10), be positioned at roughly the same measuring position D according to the peak stress point of imposed load effect, shown in an a, b, c.
Figure 36 and 37 is the local longitudinal sectional view that amplifies, and is illustrated in the mode of the 22b of paddy portion that axle 12 and hub 14 are assembled in the 28a of the peak portion engagement shaft tooth portion 22 of a time-out hub tooth portion 28.Identical with at the axle/hub unit 10 shown in Figure 11 and 12 of the operation of axle/hub unit 300 and advantage is not described in detail below.
The technology of the spline tooth 20 of processing axle tooth portion 22 will be described below.
As shown in figure 38, the rod workpiece 42 that in last manufacturing procedure, has been processed into reservation shape by cutter be inserted into by hard material make and have the essentially rectangular shape between roll extrusion tooth bar 40a and the following roll extrusion tooth bar 40b.When making roll extrusion tooth bar 40a, 40b press workpiece 42, make roll extrusion tooth bar 40a, 40b along moving on the outer surface of workpiece 42, to form spline by the opposite direction shown in the arrow by the actuator (not shown).
Therefore, can easily form a spline tooth of tooth portion 22 20 by above-mentioned rolling technology.In last manufacturing procedure, in the end face of the spline tooth 20 of axle tooth portion 22, form and have the dark cutter groove (tool marks) of about 50 μ m by cutter.
Rolling technology can form spline tooth 26 with the short cycle, and makes roll extrusion tooth bar 40a, 40b have longer working life than compacting technology (Forging Technology).According to rolling technology, can the formed tooth of roll extrusion tooth bar 40a, 40b be polished so that reuse.Rolling technology is all more superior than compacting technology (Forging Technology) from working life, formation cycle and tooth bar reusability angle aspect cost.
Yet owing to form spline tooth by making material flow to its end face in rolling technology, therefore the end face of the spline tooth that forms by rolling technology is in shape can be consistent.
Claims (17)
1. mechanism, be used for make be formed on the axle tooth portion (22) on the axle (12) and be formed on hub tooth portion (28) maintenance on the hub (14) be engaged with each other at axle (12) be located between this axle (12) hub (14) on every side and transmit torque, it is characterized in that:
The He Gubu of straight peak portion (22a) (22b) that described axle tooth portion (22) has constant transverse tooth thickness, the external diameter of this paddy portion (22b) changes from the footstalk (24) of an end towards axle (12) of axle (12);
Described hub tooth portion (28) has the He Gubu of straight peak portion (28a) (28b) of constant transverse tooth thickness, and the internal diameter of this peak portion (28a) changes from its end towards described footstalk (24), and this paddy portion (28b) axially has a constant internal diameter along axle (12); And
The described paddy portion (22b) of described axle tooth portion (22) has first stepped region (30) that rises towards described hub tooth portion (28), and the described peak portion (28a) of described hub tooth portion (28) has second stepped region (32) away from described axle tooth portion (22) withdrawal;
Described first stepped region (30) combines towards described footstalk (24) extension and with described footstalk (24), and described second stepped region (32) is extended towards described footstalk (24).
2. mechanism according to claim 1 is characterized in that, the starting point (P1) of described first stepped region (30) and the starting point (P2) of described second stepped region (32) are set in the corresponding position that is offset intended distance (L4) each other.
3. mechanism according to claim 1 is characterized in that, the inclination angle (θ) of described first stepped region (30) of described axle tooth portion (22) is set to the value of spending in the 45 degree scopes 5.
4. mechanism according to claim 1 is characterized in that, the external diameter of the described peak portion (22a) of described axle tooth portion (22) is axially constant along described axle (12).
5. mechanism according to claim 1 is characterized in that, the described peak portion (22a) of described axle tooth portion (22) has the external diameter that reduces gradually towards described footstalk (24) near its end.
6. mechanism, be used for make be formed on the axle tooth portion (22) on the axle (12) and be formed on hub tooth portion (28) maintenance on the hub (14) be engaged with each other at axle (12) be located between this axle (12) hub (14) on every side and transmit torque, it is characterized in that:
The He Gubu of straight peak portion (22a) (22b) that described axle tooth portion (22) has constant transverse tooth thickness, the external diameter of this paddy portion (22b) changes from the footstalk (24) of an end towards axle (12) of axle (12);
Described hub tooth portion (28) has the He Gubu of straight peak portion (28a) (28b) of constant transverse tooth thickness, and the internal diameter of this peak portion (28a) changes from its end towards described footstalk (24), and this paddy portion (28b) axially has a constant internal diameter along axle (12); And
The described paddy portion (22b) of described axle tooth portion (22) has an arc (130), this arcuate segments (130) has predetermined bend radius and extends towards described hub tooth portion (28), and the described peak portion (28a) of described hub tooth portion (28) has a stepped region (132), and this stepped region (132) is in the face of described arcuate segments (130) and away from described axle tooth portion (22) withdrawal;
Described arcuate segments (130) combines towards described footstalk (24) extension and with described footstalk (24), and described stepped region (132) is extended towards described footstalk (24).
7. mechanism according to claim 6, it is characterized in that described arcuate segments (130) is set at the corresponding position that is offset intended distance (L2) each other with starting point (P1) and described stepped region (132) that the paddy portion (22b) of described axle tooth portion (22) combines with the starting point (P2) that the peak portion (28a) of described hub tooth portion (28) combines.
8. mechanism, be used for make be formed on the axle tooth portion (22) on the axle (12) and be formed on hub tooth portion (28) maintenance on the hub (14) be engaged with each other at axle (12) be located between this axle (12) hub (14) on every side and transmit torque, it is characterized in that:
The He Gubu of straight peak portion (22a) (22b) that described axle tooth portion (22) has constant transverse tooth thickness, the external diameter of this paddy portion (22b) changes from the footstalk (24) of an end towards axle (12) of axle (12);
Described hub tooth portion (28) has the He Gubu of straight peak portion (28a) (28b) of constant transverse tooth thickness, and the internal diameter of this peak portion (28a) changes from its end towards described footstalk (24), and this paddy portion (28b) axially has a constant internal diameter along axle (12); And
The described paddy portion (22b) of described axle tooth portion (22) has a tapered region (230), the diameter of this tapered region (230) increases gradually towards described hub tooth portion (28), and the described peak portion (28a) of described hub tooth portion (28) has a stepped region (232), and this stepped region (232) is in the face of described wedge shape (230) and away from described axle tooth portion (22) withdrawal;
Described tapered region (230) combines towards described footstalk (24) extension and with described footstalk (24), and described stepped region (232) is extended towards described footstalk (24).
9. mechanism according to claim 8 is characterized in that, the starting point (P1) of described tapered region (230) and the starting point (P2) of described stepped region (232) are set at the corresponding position that is offset intended distance (L2) each other.
10. mechanism according to claim 8 is characterized in that, the lift angle (θ) of the described wedge shape (230) of described axle tooth portion (22) is set to the value of spending in the 65 degree scopes 6.
11. a mechanism, be used for make be formed on axle on (12) axle tooth portion (22) and be formed on hub tooth portion (28) maintenance on the hub (14) and be engaged with each other at axle (12) be located between this axle (12) hub (14) on every side and transmit torque, it is characterized in that:
The He Gubu of straight peak portion (22a) (22b) that described axle tooth portion (22) has constant transverse tooth thickness, the external diameter of this paddy portion (22b) changes from the footstalk (24) of an end towards axle (12) of axle (12), and described paddy portion (22b) has the stepped region (330) that tilts to rise at a predetermined angle towards described hub tooth portion (28); And
Described hub tooth portion (28) has the He Gubu of straight peak portion (28a) (28b) of constant transverse tooth thickness, and described peak portion (28a) and described paddy portion (28b) axially have constant internal diameter from described end towards described footstalk (24) along described axle (12).
12. mechanism according to claim 11 is characterized in that, the inclination angle (θ) of described ladder (330) is set to the value of spending in the 45 degree scopes 5.
13. a mechanism, be used for make be formed on axle on (12) axle tooth portion (22) and be formed on hub tooth portion (28) maintenance on the hub (14) and be engaged with each other at axle (12) be located between this axle (12) hub (14) on every side and transmit torque, it is characterized in that:
The He Gubu of straight peak portion (22a) (22b) that described axle tooth portion (22) has constant transverse tooth thickness, the external diameter of this paddy portion (22b) changes from the footstalk (24) of an end towards axle (12) of axle (12);
Described hub tooth portion (28) has the He Gubu of straight peak portion (28a) (28b) of constant transverse tooth thickness, and the internal diameter of this peak portion (28a) changes from its end towards described footstalk (24), and this paddy portion (28b) axially has a constant internal diameter along axle (12); And
The described paddy portion (22b) of described axle tooth portion (22) has first wedge-shaped surface (332) of inclination at a predetermined angle, and this first wedge-shaped surface (332) is extended and the rising of tilting towards described footstalk (24).
14. mechanism according to claim 13, it is characterized in that, the described peak portion (28a) of described hub tooth portion (28) has second wedge-shaped surface (334), and this second wedge-shaped surface (334) is in the face of first wedge-shaped surface (332) of the described paddy portion (22b) of described axle tooth portion (22).
15. mechanism according to claim 13, it is characterized in that the starting point (P4) that starting point (P1) that wherein said first wedge-shaped surface (332) begins to rise and wherein said second wedge-shaped surface (334) begin to rise is set at the corresponding position that axially is offset intended distance each other along described axle (12).
16. mechanism according to claim 13 is characterized in that, the described peak portion (28a) of described hub tooth portion (28) has arcuate surface (336), and this arcuate surface (336) has predetermined bend radius and withdraws away from described axle tooth portion (22).
17. mechanism according to claim 16, it is characterized in that the starting point (P5) that starting point (P1) that wherein said wedge-shaped surface (332) begins to rise and wherein said arcuate surface (336) begin to rise is set at axially being offset each other in the relevant position of intended distance along axle (12).
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP288547/2003 | 2003-08-07 | ||
| JP2003288547A JP2005054952A (en) | 2003-08-07 | 2003-08-07 | Power transmission mechanism for shaft and hub |
| JP288544/2003 | 2003-08-07 | ||
| JP288551/2003 | 2003-08-07 | ||
| JP205716/2004 | 2004-07-13 | ||
| JP207464/2004 | 2004-07-14 | ||
| JP207557/2004 | 2004-07-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1833116A CN1833116A (en) | 2006-09-13 |
| CN100404897C true CN100404897C (en) | 2008-07-23 |
Family
ID=34367164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200480022701XA Expired - Fee Related CN100404897C (en) | 2003-08-07 | 2004-08-03 | Power transmission mechanism of shaft and hub |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2005054952A (en) |
| CN (1) | CN100404897C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS3310508B1 (en) * | 1956-07-30 | 1958-12-06 | ||
| JPH11514079A (en) * | 1997-05-31 | 1999-11-30 | ジー・ケー・エヌ・オートモーティヴ・アクチェンゲゼルシャフト | Shaft / hub unit |
| JP2000097244A (en) * | 1998-07-22 | 2000-04-04 | Ntn Corp | Motive power transmission mechanism |
-
2003
- 2003-08-07 JP JP2003288547A patent/JP2005054952A/en not_active Withdrawn
-
2004
- 2004-08-03 CN CNB200480022701XA patent/CN100404897C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS3310508B1 (en) * | 1956-07-30 | 1958-12-06 | ||
| JPH11514079A (en) * | 1997-05-31 | 1999-11-30 | ジー・ケー・エヌ・オートモーティヴ・アクチェンゲゼルシャフト | Shaft / hub unit |
| JP2000097244A (en) * | 1998-07-22 | 2000-04-04 | Ntn Corp | Motive power transmission mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1833116A (en) | 2006-09-13 |
| JP2005054952A (en) | 2005-03-03 |
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