CN103029743A - Bush for rack shaft and rack-pinion type steering device - Google Patents
Bush for rack shaft and rack-pinion type steering device Download PDFInfo
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- CN103029743A CN103029743A CN2012103770517A CN201210377051A CN103029743A CN 103029743 A CN103029743 A CN 103029743A CN 2012103770517 A CN2012103770517 A CN 2012103770517A CN 201210377051 A CN201210377051 A CN 201210377051A CN 103029743 A CN103029743 A CN 103029743A
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- lining main
- rack shaft
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Abstract
A second bush (12) supporting a rack shaft (8) of a rack-pinion type steering device (1) comprises a bush main body (55) and an O-shaped ring (56). When observed in an axial direction, the bush main body (55) is C-shaped. In the bush main body, a matching groove (57) extending in a peripheral direction is formed on an external peripheral surface (55A); a notch (61) extending in an axial direction is formed, and the rack shaft (8) is inserted through an internal peripheral surface (55B). The O-shaped ring (56) is assembled in the matching groove (57) to allow a part of the O-shaped ring to extend out from the external peripheral surface (55A) of the bush main body (55).
Description
Technical field
The rack and pinion type steering swivel system that the present invention relates to a kind of lining for rack shaft and comprise this lining.
Background technology
The rack and pinion type steering swivel system that is used for vehicle is known.Japanese Patent Application Publication No.2004-161117 (JP 2004-161117A) discloses a kind of steering swivel system, this steering swivel system comprises pinion shaft and the rack shaft that is connected to bearing circle, this rack shaft and pinion shaft engagement and turning in the vehicle-width direction slip so that wheel steering in response to bearing circle.This steering swivel system also comprises: housing, and this housing holds rack shaft; Lining is contained in the housing under the state of this lining on lining is from the external mounting to the rack shaft, and flexibly supports rack shaft in this state; And rack guide.This rack guide is urged by pressure spring and urges rack shaft to pinion shaft thus.Therefore, reduced rack shaft and pinion shaft be engaged with each other the place mate in the back lash.Therefore, can prevent so-called rattling noise in the mate.
Japanese Patent Application Publication No.2008-74218 (JP 2008-74218A) has proposed a kind of configuration, and wherein, for rack guide is saved in the simplification of structure, and lining (rack bush) urges rack shaft to pinion shaft.Lining among this lining and the JP 2004-161117A is similar cylindrical, and single lining is arranged on each place, end in two ends on the axial direction of rack shaft.Be formed at the circular groove that circumferential direction is extended on the outer surface of lining, and O shape circle is assembled in the circular groove.O shape circle is compressed between the interior perimeter surface of lining and housing, thereby flexibly supports rack shaft by lining.
In addition, the first lining in the described a pair of lining at the place, two ends on the axial direction of rack shaft is positioned to compare more close pinion shaft with another lining (the second lining).Elastic component is arranged on the outer surface of the first lining.Elastic component urges the rack shaft that inserts through the first lining with the second lining as fulcrum towards the pinion shaft side.
In JP 2008-74218A in the disclosed configuration, because the cylindrical shape of lining, when lining was inserted in the housing by housing open-ended, the O shape circle on from the external mounting to the lining must be around whole circumferentially compressed between the interior perimeter surface of lining and housing.In this case, whole O shape is enclosed compressed operation need to carry out being pushed in the housing lining simultaneously.Therefore, be difficult to lining is attached to housing.
Summary of the invention
The invention provides a kind of lining, this lining can improve the attached easiness in lining urges the configuration from rack shaft to pinion shaft, and a kind of rack pinion driving type steering swivel system that comprises this lining is provided.
A first aspect of the present invention relates to a kind of lining of the rack shaft for supporting rack and pinion type steering swivel system.This lining comprises: c-shaped lining main body when in axial direction observing.This lining main body has in circumferential direction extends and is formed on mating groove on the outer surface of lining main body.This lining main body has the recess that extends in the axial direction.Rack shaft is inserted into through the inside of the interior perimeter surface of lining main body.Lining comprises the elastic component that is assemblied in the mating groove.This elastic component has from the outstanding part of the outer surface of lining main body.
According to a first aspect of the invention, in the lining with lining main body c-shaped when in axial direction observing, during lining is attached to the housing of steering swivel system, be that columnar situation is compared with the lining main body, lining has the less part that causes resistance (the compressed part between the interior perimeter surface of lining and housing in the elastic component).Therefore, lining can be easily and smoothly is attached to housing.Therefore, can improve the attached easiness of lining.
This lining can also comprise the location division that is arranged in the lining main body, outwards is giving prominence in the radial direction from an end on the axial direction of lining main body this location division, and this location division is by engaging and the positioning adapter main body with the housing that holds described rack shaft in steering swivel system.
According to this lining, in the lining with lining main body c-shaped when in axial direction observing, be that columnar situation is compared with the lining main body, the position of lining can relatively freely change during lining is attached to housing, thereby the location division that allows to be arranged in the lining main body can suitably engage with housing.Therefore, because in the situation that does not have the member that is provided for individually positioning adapter with respect to lining, lining can be positioned in the housing, therefore can reduce the quantity of parts.
In this lining, elastic component can comprise O shape circle, mating groove can comprise two grooves that extend abreast along circumferential direction, can be in the lining main body place, two ends on the circumferential direction of two grooves the locking part of locking O shape circle is set, and single O shape circle can be locked in the place, two ends on the circumferential direction of described two grooves by described locking part and be assembled in two grooves.
According to this lining, single O shape circle is assembled in two mating grooves, thereby only single O shape circle urges rack shaft by necessary and enough power towards pinion shaft with the power that urges of two O shapes circles basically, thereby makes it possible to reduce the quantity of parts.According to this lining, lining with lining main body c-shaped when in axial direction observing by with self as the point of action of power, another lining is used " lever principle " as the mate between fulcrum and rack shaft and the pinion shaft as the point of application, and can urge rack shaft towards pinion shaft with necessary and enough power thus.
A second aspect of the present invention relates to a kind of rack and pinion type steering swivel system, comprising: pinion shaft; Be arranged on the rack shaft on the direction that intersects with described pinion shaft; Housing, this housing holds pinion shaft and rack shaft; And two linings, described two linings are arranged in and place pinion shaft between described two linings in the housing and support slidably rack shaft.In this steering swivel system, at least one lining in described two linings comprises lining main body c-shaped when in axial direction observing.This lining main body is arranged between rack shaft and the described housing at the place, an end of housing.This lining main body has in circumferential direction extends and is formed on mating groove on the outer surface.This lining main body has the recess that extends in the axial direction.At least one lining in described two linings comprises elastic component, and this elastic component is assemblied in the mating groove so that the part of elastic component is outstanding from the outer surface of lining main body.This elastic component is placed between lining main body and the housing.This elastic component urges rack shaft by the lining main body towards described pinion shaft.
According to a second aspect of the invention, in the lining with lining main body c-shaped when in axial direction observing, during lining is attached to the housing of steering swivel system, be that columnar situation is compared with the lining main body, lining has the less part that causes resistance (the compressed part between the interior perimeter surface of lining and housing in the elastic component).Therefore, lining can be easily and smoothly is attached to housing.Therefore, can improve the attached easiness of lining.
In this steering swivel system, at least one lining in described two linings can comprise the location division that is arranged in the lining main body.This location division can be from an end on the axial direction of lining main body outwards outstanding in the radial direction.This location division is by engaging and the positioning adapter main body with housing.
According to this steering swivel system, in the lining with lining main body c-shaped when in axial direction observing, be that columnar situation is compared with the lining main body, the position of lining can relatively freely change during lining is attached to housing, thereby the location division that allows to be arranged in the lining main body can suitably engage with housing.Therefore, because in the situation that does not have the member that is provided for individually positioning adapter with respect to lining, lining can be positioned in the housing, therefore can reduce the quantity of parts.
In this steering swivel system, elastic component can comprise O shape circle, and mating groove can comprise two grooves that extend abreast along circumferential direction.Can in the lining main body, the locking part that locking O shape is enclosed be set the place, two ends on the circumferential direction of two grooves.Single O shape circle can be locked in the place, two ends on the circumferential direction of described two grooves by described locking part and be assembled in two grooves.
According to this steering swivel system, single O shape circle is assembled in two mating grooves, thereby only single O shape circle urges rack shaft by necessary and enough power towards pinion shaft with the power that urges of two O shapes circles basically, thereby makes it possible to reduce the quantity of parts.According to this steering swivel system, lining with lining main body c-shaped when in axial direction observing by with self as the point of action of power, another lining is used " lever principle " as the mate between fulcrum and rack shaft and the pinion shaft as the point of application, and can urge rack shaft towards pinion shaft with necessary and enough power thus.
In this steering swivel system, the lining with this lining main body is arranged on the place, end of pinion shaft side in housing.
In this steering swivel system, the cut-out on circumferential direction that the lining with this lining main body is configured such that this c-shaped lining main body is in the radial direction towards the pinion shaft side.
Description of drawings
Be described hereinafter with reference to feature, advantage, technical meaning and the industrial significance of accompanying drawing to illustrative embodiments of the present invention, identical Reference numeral represents identical element in the accompanying drawings, in the accompanying drawings:
Fig. 1 is the scheme drawing that the overall configuration of the steering swivel system in the embodiments of the present invention is shown;
Fig. 2 for illustrate particularly rack-and-pinion mechanism with and the scheme drawing of neighbouring part in steering swivel system;
Fig. 3 A is the enlarged drawing of the neighbouring part of the first lining among Fig. 2;
Fig. 3 B is the enlarged drawing of the neighbouring part of the second lining among Fig. 2;
Fig. 4 A illustrates the state on the rack shaft of larger load applying in Fig. 3 A;
Fig. 4 B illustrates the state on the rack shaft of larger load applying in Fig. 3 B;
Fig. 5 is the block diagram of the first lining;
Fig. 6 is the exploded perspective view of the first lining;
Fig. 7 is the block diagram of the second lining;
Fig. 8 is the exploded perspective view of the second lining;
Fig. 9 A is the block diagram from the lining main body of the direction observation different from Fig. 8;
Fig. 9 B is the lateral plan of the lining main body of radially observing from the outside;
Fig. 9 C is the lateral plan of the lining main body of in axial direction observing from the outside;
Fig. 9 D is the section drawing of the line A-A in Fig. 9 B;
Figure 10 A illustrates the first lining just by the section drawing of the housing of attached state;
Figure 10 B is the attached block diagram that the housing of the second lining to Figure 10 A is shown;
Figure 11 A illustrates the state that the second lining just has been attached to the housing among Figure 10 A;
Figure 11 B is the section drawing of the line B-B in Figure 11 A; And
Figure 12 illustrates the state that rack shaft just has been attached to the housing among Figure 11 A.
The specific embodiment
Below with reference to accompanying drawings preferred implementation of the present invention is described.Fig. 1 is the scheme drawing that the overall configuration of the steering swivel system 1 in the embodiments of the present invention is shown.With reference to Fig. 1, this steering swivel system 1 mainly comprises for example steering component 2, steering shaft 3, the first Hooke's coupling 4, tween drive shaft 5, the second Hooke's coupling 6, pinion shaft 7, rack shaft 8 and the housing 9 of bearing circle.Steering shaft 3 is connected to steering component 2.Steering shaft 3 and tween drive shaft 5 are connected to together by the first Hooke's coupling 4.Tween drive shaft 5 and pinion shaft 7 are connected to together by the second Hooke's coupling 6.
The first lining 11 and the second lining 12 are for the part of steering swivel system 1 and be arranged to pinion shaft 7 is placed housing 9 from axial direction X.Gear wheel shaft 8 by the first lining 11 and the supporting of the second lining 12 and in axial direction X slide with respect to lining.The first lining 11 and the second lining 12 will be described in detail subsequently in the back.
Two ends (on axial direction X) that are contained in the rack shaft 8 in the housing 9 are projected into the outside from two ends of housing 9.Pull bar 14 joins each end in two ends to by joint 13.Each pull bar in the pull bar 14 all is connected to wheel 15 by corresponding track arm (not shown).When operation steering component 2 and steering shaft 3 rotation, rotatablely moving is transformed into rack shaft 8 along the motion of translation (slip) of axial direction X by miniature gears 7A and tooth bar 8A.Therefore, realized each turn in the wheel 15.
Fig. 2 for illustrate particularly rack-and-pinion mechanism 10 with and the scheme drawing of neighbouring part in steering swivel system 1.Fig. 3 A is the enlarged drawing of the neighbouring part of the first lining 11 among Fig. 2.Fig. 3 B is the enlarged drawing of the neighbouring part of the second lining 12 among Fig. 2.Fig. 4 A illustrates the state on the rack shaft 8 of larger load applying in Fig. 3 A.Fig. 4 B illustrates the state on the rack shaft 8 of larger load applying in Fig. 3 B.
Fig. 2 illustrates above-mentioned housing 9, rack and pinion mechanism 10 (pinion shaft 7 and rack shaft 8), the first lining 11 and the second lining 12.These parts will be described hereinafter.Housing 9 is aforesaid hollow circle tube, and its hollow bulb 20 formation cylindrical shapes, and the central axis that cylindrical shape has extends along axial direction X.The end of hollow bulb 20 on axial direction X is exposed to the outside (outside in the left side among Fig. 2), as first opening 21 at first end 91 places.Hollow bulb 20 the other end on axial direction X is exposed to the outside (outside on right side among Fig. 2), as second opening 22 at the second end 92 places.Each opening in the first opening 21 and the second opening 22 is the circular hole that has greater than the diameter of rack shaft 8.
At first end 91 places, the interior perimeter surface 23 that in housing 9, limits hollow bulb 20 with the order of more close the first opening 21 comprise perimeter surface in the outside (on the axial direction X in the interior perimeter surface in the outside of housing 9) 24, perimeter surface in annular projection 25, circular groove 26 and the inboard interior perimeter surface of the inboard of housing 9 (on the axial direction X) 27 and stage portion 28.Perimeter surface 24 is extended to the second end 92 sides (right side Fig. 2) continuously for peripheral surface with internal diameter identical with the first opening 21 and from the first opening 21 in the outside.Annular projection 25 is around a whole circumferentially end (ends of the second end 92 sides) of the perimeter surface 24 inside part of outstanding and whole circular in configuration radially in the outside with the ring shape.Circular groove 26 is for around the whole circumferentially outside part of recessed and whole circular in configuration radially from the end (ends of the second end 92 sides) of annular projection 25.In inboard perimeter surface 27 from an end (ends of the second end 92 sides) lateral confinement decide circular groove 26 and for example extend to the second end 92 sides with the diameter identical with annular projection 25.Stage portion 28 is for centering on the whole ring part of circumferentially radially inwardly giving prominence to from an end (ends of the second end 92 sides) of inboard interior perimeter surface 27.
At the second end 92 places, interior perimeter surface 23 comprises perimeter surface 34 in the outside, annular projection 35, circular groove 36 and inboard interior perimeter surface 37 and stage portion 38 with the order of more close the second opening 22.Perimeter surface 34 is extended to first end 91 sides (left side Fig. 2) continuously for peripheral surface with internal diameter identical with the second opening 22 and from the second opening 22 in the outside.Annular projection 35 is around a whole circumferentially end (ends of first end 91 sides) of the perimeter surface 34 inside part of outstanding and whole circular in configuration radially in the outside with the ring shape.Circular groove 36 is for around the whole circumferentially outside part of recessed and whole circular in configuration radially from the end (ends of first end 91 sides) of annular projection 35.In inboard perimeter surface 37 from an end (ends of first end 91 sides) lateral confinement decide circular groove 36 and for example extend to first end 91 sides with the diameter identical with annular projection 35.Stage portion 38 is for centering on the whole ring part of circumferentially radially inwardly giving prominence to from an end (ends of first end 91 sides) of inboard interior perimeter surface 37.
In addition, the part between the stage portion 38 of the stage portion 28 of first end 91 sides and the second end 92 sides of interior perimeter surface 23 is the peripheral surface 39 with approximately constant internal diameter.The recessed recess 40 that radially outwards (makes progress among Fig. 2) of housing 9 is formed on the position of more close a little stage portion 38 in peripheral surface 39.Recess 40 forms the part of the hollow bulb 20 of housing 9.The partial response corresponding with recess 40 on the periphery wall of housing 9 radially bulges in recess 40 ground.
In rack and pinion mechanism 10, the miniature gears 7A of pinion shaft 7 is cylindricality or cylindrical and be connected to coaxially pinion shaft 7.A plurality of gear teeth 41 are arranged on the outer surface of miniature gears 7A along circumferential direction.Miniature gears 7A is contained in the above-mentioned recess 40.Rack shaft 8 is the cylindricality of extending at above-mentioned axial direction X.Rack shaft 8 is longer than housing 9 on axial direction X.Therefore, rack shaft 8 end (left part among Fig. 2) is projected into the outside (outside in left side among Fig. 2) of housing 9 by the first opening 21.Another end of rack shaft 8 (right part among Fig. 2) is projected into the outside (outside on right side among Fig. 2) of housing 9 by the second opening 22.In addition, be arranged in the scope that a little more is close to the second opening 22 sides on the axial direction X in the circumferential portion of above-mentioned tooth bar 8A on the outer surface 8B of rack shaft 8.Tooth bar 8A is formed with a plurality of gear teeth 42 of in axial direction X arrangement.The gear teeth 41 of miniature gears 7A and the gear teeth 42 of gear 8A are engaged with each other.Fig. 2 illustrates rack shaft 8 and is under the neutral state that wheel 15 (referring to Fig. 1) is not diverted.At this moment, the middle body engagement on axial direction X of miniature gears 7A and tooth bar 8A.The content of Fig. 3 A, Fig. 3 B, Fig. 4 A and Fig. 4 B will be explained hereinafter.
Next, will be described the first lining 11.Fig. 5 is the block diagram of the first lining 11.Fig. 6 is the exploded perspective view of the first lining 11.With reference to Fig. 5 and Fig. 6, the first lining 11 comprises lining main body 45 and a plurality of (being two here) O shape circle 46.Lining main body 45 is formed and is formed hollow circle tube by resin, and the both sides of its hollow bulb on its axial direction are opened wide.Be arranged under the state in the steering swivel system 1 (referring to Fig. 1 and Fig. 2) at the first lining 11, the axial direction of lining main body 45 is consistent with above-mentioned axial direction X.The internal diameter of lining main body 45 is less times greater than the external diameter of rack shaft 8.The external diameter of lining main body 45 is to a certain extent less than perimeter surface 27 (referring to Fig. 2) in first end 91 places of housing 9 inboard.
Two mating grooves 47 that extend in circumferential direction are formed on the outer surface 45A of lining main body 45 in the axial direction at certain intervals.Each mating groove 47 in the mating groove 47 forms and forms annular at the outer surface 45A that circumferential direction spreads all over lining main body 45.Each mating groove 47 in the mating groove 47 along the concave shape rectangular with the cross section on the plane of the circumferential direction quadrature of lining main body 45.The quantity of mating groove 47 is consistent with the quantity of O shape circle 46, is two here.
The end (left part among Fig. 5 and Fig. 6) that the flange 48 of outwards giving prominence to along the radial direction of lining main body 45 with the ring shape is unitarily formed on the axial direction of lining main body 45 is located.Flange 48 integral body form the annular coaxial with lining main body 45.The external diameter of flange 48 is greater than the internal diameter of the annular projection 25 on the interior perimeter surface 23 of housing 9, and less than the internal diameter (referring to Fig. 2) of the circular groove 26 on the interior perimeter surface 23.
Extend and be formed on the lining main body 45 from a plurality of recesses 49 of flange 48 lateral incision flanges 48 and lining main body 45 at the axial direction of lining main body 45.Recess 49 is arranged with predetermined distance along the circumferential direction of lining main body 45.Each recess 49 in the recess 49 is all cutting flange 48 in the radial direction, in transverse to two mating grooves 47, in the part of the circumferential wall that cuts in the radial direction lining main body 45, and be exposed on the outer surface 45A and interior perimeter surface 45B of lining main body 45.End on the opposition side in flange 48 sides of each recess 49 in the recess 49 (right side among Fig. 5 and Fig. 6) does not arrive the edge of lining main body 45 on this opposition side.
O shape circle 46 elastomeric materials by for example rubber form and form annular shape.The cross section along with the plane of the circumferential direction quadrature of O shape circle 46 of O shape circle 46 be circle.Two O shape circle 46 outsides from lining main body 45 are assembled on the lining main body 45.In this case, in single O shape circle 46 each mating groove 47 that is assemblied in the mating groove 47.At this moment, to a certain degree tension force puts on each O shape circle 46 in the O shape circle 46.
As shown in Figure 5, in the first lining 11 of such completion status, the part (outside in the radial direction) of each the O shape circle 46 in the O shape circle 46 is radially outwards outstanding from mating groove 47 (the outer surface 45A of lining main body 45).In addition, the diameter of the first lining 11 can flexibly reduce by the width (width on the circumferential direction) that dwindles each recess 49 in the recess 49.Therefore, hold the first lining 11 and the first lining 11 is applied the diameter that power can reduce whole the first lining 11 by finger, and reduce the original size that diameter that this power can make the first lining 11 increases to the first lining 11.
Next, will be described the second lining 12.Fig. 7 is the block diagram of the second lining 12.Fig. 8 is the exploded perspective view of the second lining 12.Fig. 9 A is the block diagram from the lining main body 55 of the direction observation different from Fig. 8.Fig. 9 B is the lateral plan of the lining main body 55 of radially observing from the outside.Fig. 9 C is the lateral plan of the lining main body 55 of in axial direction observing from the outside.Fig. 9 D is the section drawing of the line A-A in Fig. 9 B.
With reference to Fig. 7 and Fig. 8, the second lining 12 comprises lining main body 55 and O shape circle 56 (elastic components).Lining main body 55 has been formed and has been formed the profile of the second lining 12 by resin.Lining main body 55 forms the C shape arc by the datum line Y shown in the long and two-short dash line among Fig. 8 that has as the center of cambered surface.The bearing of trend of datum line Y is the axial direction of lining main body 55.If the visual angle of observing from axial direction is " side-looking ", then lining main body 55 is c-shaped when side-looking.Lining main body 55 has the width of the regulation on the axial direction.In other words, lining main body 55 is the shape identical with cylindrical shape, and the central axis that this shape has extends in the axial direction and this shape has a part of upwards excising in week.The second lining 12 that comprises such lining main body 55 is c-shaped equally on the whole when side-looking.Be arranged under the state in the steering swivel system 1 (seeing figures.1.and.2) at the second lining 12, the axial direction of lining main body 55 is consistent with above-mentioned axial direction X.
With the center of datum line Y as lining main body 55, the outer surface in the radial direction of lining main body 55 is called " outer surface 55A ", and inner surface in the radial direction is called " interior perimeter surface 55B ".Outer surface 55A and interior perimeter surface 55B are c-shaped when side-looking.In addition, in lining main body 55, cut-out on the circumferential direction of C shape is defined as peristome 55C, and the interior perimeter surface 55B side of lining main body 55 two ends are in the axial direction located and are opened wide in peristome 55C side (being orthogonal to the side of axial direction).
(interior perimeter surface 55B's) internal diameter of lining main body 55 is less times greater than the external diameter of rack shaft 8.(outer surface 55A's) external diameter of lining main body 55 is to a certain extent less than perimeter surface 37 (referring to Fig. 2) in the second end 92 places of housing 9 inboard.Two mating grooves 57 that extend in circumferential direction are formed on the outer surface 55A of lining main body 55 in the axial direction at certain intervals.Two mating grooves 57 extend parallel to each other in circumferential direction.The outer surface 55A that each mating groove 57 in the mating groove 57 all spreads all over lining main body 55 in circumferential direction forms and the C shape when being similarly constructed side-looking with lining main body 55.Each mating groove 57 in the mating groove 57 along with the equal rectangular concave shape in the cross section on the plane of the circumferential direction quadrature of lining main body 55.
On outer surface 55A, each mating groove 57 in the mating groove 57 all is assumed to recess, then the other parts except recess are projection 58 (referring to Fig. 9 B).Projection 58 is the bar shaped of extending in circumferential direction, and three projections 58 are arranged to alternately arrange with two mating grooves 57 in the axial direction.Each projection 58 in the projection 58 all almost spreads all over outer surface 55A ground and extends on circumferential direction.Among three projections 58, each end in two ends on the circumferential direction of the projection 58 in the middle of being positioned in the axial direction all forms locking part 59.In Fig. 8, in pair of locking section 59, the locking part 59 that can't see in Fig. 8 illustrates by imaginary line (dotted line).Described pair of locking section 59 is positioned at the place, two ends on the circumferential direction of mating groove 57.Radially each locking part 59 the locking part 59 all is the piece shape that bloats with arc towards the peristome 55C of lining main body 55 when the outside is observed.
The end (the right front end among Fig. 8 and Fig. 9) that the flange 60 (location division) of outwards giving prominence to along the radial direction of lining main body 55 with ring shape is unitarily formed on the axial direction of lining main body 55 is located.Flange 60 integral body when side-looking forms the C shape coaxial with lining main body 55.In the radial direction, flange 60 is projected into the outside (referring to Fig. 9 B) of the outer surface 55A (end, top that comprises projection 58) of lining main body 55.The external diameter of flange 60 is greater than the internal diameter of the annular projection 35 on the interior perimeter surface 23 of housing 9 and less than the internal diameter (referring to Fig. 2) of the circular groove 36 on the interior perimeter surface 23.In addition, the projection 62 that radially bloats with arc when side-looking is partly located in the substantial middle that the outer surface of flange 60 is unitarily formed on circumferential direction.
Extend and open a plurality of (being four here) recess 61 of cutting flange 60 and lining main body 55 from flange 60 sides at the axial direction of lining main body 55 and be formed on the lining main body 55.These recesses 61 are arranged with predetermined distance along the circumferential direction of lining main body 55.Each recess 61 in the recess 61 is all cutting flange 60 in the radial direction, in transverse to two mating grooves 57, in the part of the circumferential wall that cuts in the radial direction lining main body 55, and be exposed on the outer surface 55A and interior perimeter surface 55B of lining main body 55.End on the opposition side in flange 60 sides of each recess 61 in the recess 61 (left side among Fig. 8 and Fig. 9 B) does not arrive the edge (see Fig. 9) of lining main body 55 on this opposition side.After recess 61 forms, except two projections 58 the projection 58 on this opposition side separated on circumferential direction thus.
O shape circle 56 elastomeric materials by for example rubber form and form annular shape.The cross section along with the plane of the circumferential direction quadrature of O shape circle 56 of O shape circle 56 be circle.Two O shape circle 56 outsides from lining main body 45 are assembled on the lining main body 45.In the second lining 12, provide single O shape circle 56.Single O shape circle 56 be case of bending (may be primitively case of bending) so that as shown in Figure 8 single O shape circle 56 axial directions in lining main body 55 be flat shape and by described pair of locking section 59 lockings (referring to Fig. 7 and Fig. 9 D) of lining main body 55.In addition, in O shape circle 56, be assembled in the mating groove 57 of flange 60 sides through locking part 59, a part of extending along circumferential direction in flange 60 sides, and the remainder of O shape circle 56 (part of extending along circumferential direction through locking part 59, at the opposition side of flange 60 sides) is assembled to (referring to Fig. 7 and Fig. 9 B) in the remaining mating groove 57 (at this opposition side).In other words, single O shape circle is locked and is assembled in two mating grooves 57 by the locking part 59 at the place, two ends on the circumferential direction of mating groove 57.At this moment, to a certain degree tension force is applied on the O shape circle 56.
For the part by 59 lockings of described pair of locking section in the O shape ring 56 can be locked reliably by locking part 59, these parts can not have round section and have and can carry out the sheet tee section that face contacts with the outer surface of locking part 59.In addition, each locking part 59 in the locking part 59 all preferably has the shape (for example, hook-type) that can lock reliably O shape circle 56.As shown in Figure 7, in the second lining 12 of such completion status, the part (outside in the radial direction) of O shape circle 56 is radially outwards given prominence to (referring to Fig. 9 B and Fig. 9 D) from mating groove 57 (the outer surface 55A of lining main body 55).In addition, similar with the first lining 11, the diameter of the second lining 12 can flexibly reduce by the width (width on the circumferential direction) that dwindles each recess 61 in the recess 61.Therefore, hold the second lining 12 and the second lining 12 is applied the diameter that power can reduce whole the second lining 12 by finger, and reduce the original size that diameter that this power can make the second lining 12 increases to the second lining 12.
Next, will be described rack and pinion mechanism 10, the first lining 11 and the second lining 12 to the attached of housing 9.Figure 10 A illustrates the first lining 11 just by the section drawing of the housing 9 of attached state.Figure 10 B is the attached block diagram that the housing 9 among the second lining 12 to Figure 10 A is shown.Figure 11 A illustrates the state that the second lining 12 just has been attached to the housing 9 among Figure 10 A.Figure 11 B is the section drawing of the line B-B in Figure 11 A.Figure 12 illustrates the state that rack shaft 8 just has been attached to the housing 9 among Figure 11 A.
At first, with reference to Figure 10 A, the first lining 11 is attached to housing 9.Particularly, the first lining 11 under the state before the diameter that is in the first lining 11 is reduced is inserted in the first opening 21 of housing 9 along axial direction X.At this moment, in the first lining 11, make the part except flange 48 of lining main body 45 before flange 48, pass the first opening 21.Afterwards, the part except flange 48 of the lining main body 45 of the first lining 11 is sequentially passed the part that centered on by annular projection 25 and the part that centered on by circular groove 26 and insert through the inside of perimeter surface 27 in inboard.During this step, in the first lining 11, O shape ring 46 in the radial direction internally in inboard perimeter surface 27 whole circumferentially with inboard in perimeter surface 27 contact, and O shape is enclosed 46 and is compressed to a certain extent between perimeter surface 27 and the lining main body 45 in the inboard.Yet, in inboard, center on the whole gap to a certain degree (gap in the radial direction) of circumferentially having guaranteed between the outer surface 45A of perimeter surface 17 and lining main body 45.
When the part except flange 48 of lining main body 45 was further inserted through the inside of perimeter surface 27 in inboard, flange 48 contacted with annular projection 25 from the first opening 21 sides, and the first lining 11 can not be advanced further.Therefore, as mentioned above, the first lining 11 (particularly flange 48) is held to reduce the diameter of the first lining 11 (particularly flange 48), and the external diameter of flange 48 becomes thus less than the internal diameter of the annular projection 25 on the interior perimeter surface 23 of housing 9.Therefore, flange 48 (in other words, whole the first lining 11) can pass the part that is centered on by annular projection 25.Flange 48 passes after the part that is centered on by annular projection 25, and the diameter of the first lining 11 increases to the original size of the first lining 11, and flange 48 circumferentially radially is assembled in the circular groove 26 internally around whole thus.
Therefore, shown in Figure 10 A, the first lining 11 is in axial direction X at flange 48 and is positioned, and has finished attached to housing 9 of the first lining 11.In this state, the outer surface 45A of lining main body 45 is in perimeter surface 27 in inboard internally in the radial direction.In addition, each the O shape circle 46 in two O shapes circle 46 is all compressed between perimeter surface 27 and the lining main body 45 in inboard to a certain extent.Yet, circumferentially in inboard, guaranteed gap to a certain degree between the outer surface 45A of perimeter surface 27 and lining main body 45 around whole.As mentioned above, the first lining 11 is arranged on the proximal end (first end 91) of the first opening 21 in the housing 9 and locates, thereby has made things convenient for attached to housing 9 of the first lining 11.
Except being assemblied in flange 48 in the circular groove 26, the stage portion 28 of housing 9 also is positioned at the place, end of lining main body 45.Therefore, the first lining 11 do not cross in the hollow bulb 20 of housing 9 stage portion 28 and towards the second end 92 lateral movements.Next, with reference to Figure 10 B, the second lining 12 is attached to housing 9.Particularly, the second lining 12 under the state before the diameter that is in the second lining 12 is reduced is inserted in the second opening 22 of housing 9 along axial direction X (referring to the bold arrow among Figure 10 B).At this moment, in the second lining 12, make the part except flange 60 of lining main body 55 before flange 60, pass the second opening 22.Afterwards, the part except flange 60 of the lining main body 55 of the second lining 12 is sequentially passed the inside of the part that is centered on by annular projection 35 and the part that is centered on by circular groove 36 (part of painted black among Figure 10 B) and the inboard interior perimeter surface 37 of process and is inserted.
In this step, in the second lining 12, single O shape ring 56 is assembled to part in the mating groove 57 from contacting with perimeter surface 37 in the inboard in inside in the radial direction.Yet, because the second lining 12 is c-shaped when side-looking as mentioned above, therefore the second lining 12 to a certain extent in the cylindrical hollow section 20 in housing 9 in the in the radial direction freely motion of housing 9 (hollow bulb 20).Therefore, when lining main body 55 was inserted through the inside of interior perimeter surface 37, even O shape circle 56 contacts with inboard interior perimeter surface 37, the contact of O shape circle 56 also only produced very little resistance to the insertion of lining main body 55.
In other words, when having side-looking in the second lining 12 of c-shaped lining main body 55, (be O shape during side-looking with lining main body 55 for cylindrical shape, referring to the first lining 11) situation compare, the second lining 12 has the less part that causes resistance during the second lining 12 is attached to housing 9.Relevant part is the compressed part between the lining main body 55 of the second lining 12 and the interior perimeter surface 23 of housing 9 (perimeter surface 37 in inboard) of O shape circle 56.Therefore, the second lining 12 can be easily and smoothly is attached to housing 9.Therefore, can improve the attached easiness of the second lining 12.
In addition, when the part except flange 60 of lining main body 55 was further inserted through the inside of perimeter surface 37 in inboard, flange 60 contacted with annular projection 35 from the second opening 22 sides, and the second lining 12 can not be advanced further.Therefore, as mentioned above, the second lining 12 (particularly flange 60) is held to reduce the diameter of the second lining 12 (particularly flange 60), and the external diameter of flange 60 becomes thus less than the internal diameter of the annular projection 35 on the interior perimeter surface 23 of housing 9.Therefore, flange 60 (in other words, whole the second lining 12) can pass the part that is centered on by annular projection 35.Flange 60 passes after the part that is centered on by annular projection 35, the diameter of the second lining 12 increases to the original size of the second lining 12, shown in Figure 11 A, flange 60 circumferentially radially is assembled in the circular groove 36 internally around whole thus, thereby engages with housing 9.
In addition, flange 60 engages with housing 9, and the second lining 12 is thus with respect to housing 9 be positioned at flange 60 places (on axial direction X).Therefore, finished attached to housing 9 of second lining 12.As mentioned above, when having side-looking in the second lining 12 of c-shaped lining main body 55, compare for columnar situation (situation of the first lining 11) with lining main body 55, the position of the second lining 12 can relatively freely change in housing 9 inside during the second lining 12 is attached to housing 9.Therefore, the flange 60 that is arranged in the lining main body 55 can suitably engage with the circular groove 36 of housing 9.Therefore, at the member that is used for location the second lining 12 that does not provide individually except the second lining 12, to be arranged on the second lining 12 in the housing 9 and to locate by this member in the situation of the second lining 12, the second lining 12 can be positioned in the housing 9, thereby allows to reduce number of components.In addition, as mentioned above, the second lining 12 is arranged on the proximal end (the second end 92) of the second opening 22 in the housing 9 and locates, thereby has made things convenient for attached to housing 9 of the second lining 12.
Except being assemblied in flange 60 in the circular groove 36, the stage portion 38 of housing 9 also is positioned at the place, end of lining main body 55.Therefore, the second lining 12 is not crossed stage portion 38 in the hollow bulb 20 of housing 9 with towards first end 91 lateral movements.Be attached under the state of housing 9 at the second lining 12, the outer surface 55A of lining main body 55 is in perimeter surface 37 in inboard internally in the radial direction.In addition, in this state, O shape circle 56 is contacting perimeter surface 37 in the inboard in the radial direction internally.Yet, as mentioned above, because the to a certain extent radially motion in housing 9 (hollow bulb 20) of the second lining 12, so O shape circle 56 is compressed between perimeter surface 37 and the lining main body 55 in inboard hardly.Therefore, the outer surface 55A of lining main body 55 radially inwardly separates with inboard interior perimeter surface 37, and has circumferentially guaranteed gap to a certain degree between the perimeter surface 37 in outer surface 55A and inboard around whole.
In the corresponding part of the projection 62 of in the circular groove 36 of housing 9 and outer surface flange 60, formed and be integral with circular groove 36 and the darker engaging groove 36A more recessed than circular groove 36.The projection 62 of flange 60 radially is assembled among the engaging groove 36A internally.Therefore, whole the second lining 12 is positioned and has prevented rotation in circumferential direction.In addition, projection 62 can be arranged among the engaging groove 36A (the interior perimeter surface 23 of housing 9), and engaging groove 36A can be arranged in the outer surface of flange 60, thereby allows at circumferential direction location the second lining 12.
Aforesaidly arrange in the second lining 12 that circumferential direction is positioned position (apart from recess 40 position farthest) along 180 ° of recess 40 dislocations on the interior perimeter surface 23 of housing 9, so that when observing from axial direction X the peristome 55C of lining main body 55 towards recess 40 (referring to Figure 11 A) side of housing 9, shown in Figure 11 B.Therefore, when observing from axial direction X, lining main body 55 does not make outer surface 55A make interior perimeter surface 55B towards recess 40 sides towards recess 40.
In Figure 11 B, for ease of describing, although not shown O shape ring 56 (referring to Figure 11 A) show rack shaft 8 by a dotted line.Next, with reference to Figure 12, rack shaft 8 is inserted in the housing 9 (hollow bulb 20) by the first opening 21 or the second opening 22.When rack shaft 8 is inserted in the housing 9 by the first opening 21, rack shaft 8 along axial direction X sequentially through the interior perimeter surface 55B of the lining main body 55 of the peripheral surface 39 of the hollow bulb of the lining main body 45 of the first lining 11, housing 9 and the second lining 12 and insert.
On the contrary, when rack shaft 8 is inserted in the housing 9 by the first opening 22, rack shaft 8 along axial direction X sequentially through the hollow bulb of the lining main body 45 of the peripheral surface 39 of the interior perimeter surface 55B of the lining main body 55 of the second lining 12, housing 9 and the first lining 11 and insert.No matter be which kind of mode, when rack shaft 8 was inserted the hollow bulb of lining main body 45 of the first lining 11, the first lining 11 is being assembled on the rack shaft 8 from the outside in the radial direction at first end 91 places, and is arranged between the interior perimeter surface 23 of rack shaft 8 and housing 9.In addition, when the rack shaft 8 interior perimeter surface 55B by the lining main body 55 of the second lining 12 inserts, the second lining 12 is located be assembled in the radial direction on the rack shaft 8 from the outside at the second end 92 (end of housing 9), and is arranged between the interior perimeter surface 23 of rack shaft 8 and housing 9.
In in the interior perimeter surface 55B of the lining main body 55 of the interior perimeter surface 45B of the lining main body 45 of the first lining 11 and the second lining 12 each, convergent section 63 all is arranged on two edges on the axial direction X (referring to Fig. 5 and Fig. 7).Among the interior perimeter surface 55B of the hollow bulb of the lining main body 45 that therefore, rack shaft 8 can be by the first lining 11 and the lining main body 55 of the second lining 12 any smoothly inserted.
Here, the second lining 12 can radially to a certain extent freely motion (referring to Figure 11 A and Figure 11 B) in housing 9 under the state before rack shaft 8 insertions.Yet under the state after rack shaft 8 inserts, the second lining 12 is pushed on the inboard interior perimeter surface 37 by rack shaft 8, and the second lining 12 alone can not be in the radial direction freely motion in housing 9.When in axial direction X observation, the second lining 12 is promoted along the direction (downward among Figure 12) away from recess 40 by rack shaft 8 in this state.In addition, the second lining 12 is pushed on inboard interior perimeter surface 37 sides by rack shaft 8, and the circle of the O shape in the second lining 12 56 is compressed between the perimeter surface 37 (housing 9) in lining main body 55 and inboard thus.But, circumferentially in the outer surface 55A of lining main body 55 and inboard, guaranteed gap to a certain degree between the perimeter surface 37 around whole.
As shown in figure 12, when rack shaft 8 at first from the first opening 21 and the second opening 22 another of the end by an insertion in the first opening 21 and the second opening 22 just finished the insertion (rack shaft 8 to housing 9 attached) of rack shaft 8 in housing 9 out the time.Do not contacted any part of housing 9 by attached rack shaft 8.
Here, on the outer surface 8B of rack shaft 8, on axial direction X in the part of recess 40 sides (upside among Figure 12) of housing 9 (in Figure 12, part from first end 91 sides in abutting connection with tooth bar 8A), is formed with towards the recessed recess 100 (not shown in other accompanying drawing) of the axis of rack shaft 8.When rack shaft 8 just is being attached to housing 9 (during the insertion of rack shaft 8), in the axial direction under the corresponding state, the insertion of rack shaft 8 is supspended at recess 100 and recess 40.At this moment, recess 100 and recess 40 are configured to adjacent one another are, thereby form relatively large space.Therefore, the miniature gears 7A (referring to Fig. 2) of pinion shaft 7 is inserted in this space, and the insertion of rack shaft 8 is proceeded after this.Then, because recess 100 separates with recess 40 on axial direction X, therefore in response to this, the miniature gears 7A in the recess 40 is removed from recess 100, and as shown in Figure 2, the gear teeth 41 of miniature gears 7A are engaged with each other with the gear teeth 42 of the tooth bar 8A of rack shaft 8.
The gear teeth 41 and the gear teeth 42 begin to be engaged with each other be about to begin before, miniature gears 7A is momently against tooth bar 8A (ends of recess 100 sides), and rack shaft 8 is crooked slightly along the direction (the second lining 12 sides) away from recess 40.This has caused rack shaft 8 mobile so that compressed between the O shape circle 56 interior perimeter surface 23 at lining main body 55 and housing 9 (perimeter surface 37 in inboard) of the second lining 12 slightly in the radial direction.After the gear teeth 41 and the gear teeth 42 correctly meshed each other, rack shaft 8 was got back to crooked state (position before moving in the radial direction) before immediately.When the insertion of rack shaft 8 in housing 9 finished (equally referring to Figure 12), rack shaft 8 is finished to the attached of housing 9, and rack and pinion mechanism 10 is finished, and rack and pinion mechanism 10 to the attached of housing 9 finished.Because the position (referring to Figure 12) of recess 100, the direction of insertion of the rack shaft 8 here is the direction (direction left) from the second opening 22 to the first opening 21.
Next, will the function in steering swivel system 11 be described the first lining 11 and the second lining 12.With reference to Fig. 2, Fig. 3 A and Fig. 3 B, as mentioned above, the first lining 11 and the second lining 12 both are in from the outside under the state that is assembled in the radial direction rack shaft 8.Therefore, in the first lining 11, the interior perimeter surface 45B of lining main body 45 contacts with the outer surface 8B face of rack shaft 8.In the second lining 12, the interior perimeter surface 55B of lining main body 55 contacts with the outer surface 8B face of rack shaft 8.Therefore, the first lining 11 and the second lining 12 support rack shaft 8 slidably on axial direction X.Here, the first lining 11 is positioned in the housing 9 with flange 48, and the second lining 12 is positioned in the housing 9 with flange 60.Therefore, even rack shaft 8 slides in response to operating on the axial direction X of steering component 2, the position of these linings on axial direction X is also mobile.
In addition, in the first lining 11, two O shape circles 46 that are installed on the lining main body 45 are compressed between the perimeter surface 27 in the inboard of lining main body 45 and housing 9.In the second lining 12, the single O shape circle 56 that is installed on the lining main body 55 is compressed between the perimeter surface 37 in the inboard of lining main body 55 and housing 9.Therefore, the first lining 11 and the second lining 12 are flexibly supporting rack shaft 8 in the radial direction.In addition, in O shape circle 46 and the O shape circle 56 in the radial direction inwardly the elasticity bounce of effect reduced slightly to have the diameter of the first lining 11 (referring to Fig. 5) of recess 49 and the diameter with second lining 12 (referring to Fig. 7) of recess 61.Therefore, the interior perimeter surface 55B of the lining main body 55 of the interior perimeter surface 45B of the lining main body 45 of the first lining 11 and the second lining 12 contacts with the outer surface 8B face of rack shaft 8 in mode very close to each other.
Here, during Vehicle Driving Cycle, when the load in the radial direction (radial weight) hour (not operating under the little load condition of steering component 2) that is applied to by rack shaft 8 on the first lining 11 and the second lining 12, the Outboard Sections in the radial direction of each the O shape circle 46 in the O shape circle 46 is outstanding and contact with perimeter surface 27 in housing 9 inboard from the outer surface 45A of the lining main body 45 of the first lining 11.In addition, the Outboard Sections in the radial direction of O shape circle 56 is given prominence to and is contacted with the inboard interior perimeter surface 37 of housing 9 from the outer surface 55A of the lining main body 55 of the second lining 12.Therefore, in O shape circle 46 and the O shape circle 56 each all absorbs above-mentioned little load, and the gamut on the circumferential direction has been guaranteed gap S in the radial direction (referring to Fig. 3 A) between the perimeter surface 27 in the inboard of the outer surface 45A of the lining main body 45 of the first lining 11 and housing 9 thus.In addition, the gamut on the circumferential direction has been guaranteed gap S in the radial direction (referring to Fig. 3 B) between the perimeter surface 37 in the inboard of the outer surface 55A of the lining main body 55 of the second lining 12 and housing 9 equally.
Therefore, when radial weight hour, the lining main body 45 of the first lining 11 is by two flexibly supportings of O shapes circle 46, so that lining main body 45 is radially inwardly separated with perimeter surface 27 in housing 9 inboard.In addition, at this moment, the lining main body 55 of the second lining 12 is by single flexibly supporting of O shape circle 56, so that lining main body 55 is radially inwardly removed from the inboard interior perimeter surface 37 of housing 9.Therefore, the rack shaft 8 that is supported by the first lining 11 and the second lining 12 is flexibly supported, and makes it possible to thus prevent the vibration of rack shaft 8.
On the other hand, the collision of the steering operation of steering component 2, wheel 15 (referring to Fig. 1) and curb etc. can cause being applied to by rack shaft 8 increase of the radial weight on the first lining 11.Under this top load state, in the first lining 11, shown in Fig. 4 A, two O shapes circles 46 of lining main body 45 compression and radially by outside (among Fig. 4 A downwards) dislocation.In addition, each O shape circle 46 in the O shape circle 46 finally is contained in the mating groove 47 fully, the outer surface 45A of the lining main body 45 of the first lining 11 contacts with the inboard interior perimeter surface 27 of housing 9, and above-mentioned gap S (referring to Fig. 3 A) disappears at the part place that is making progress in week.
In addition, when being applied to radial weight on the second lining 12 by rack shaft 8 and increasing, in the second lining 12, shown in Fig. 4 B, the O shape circle 56 that 55 compressions of lining main body are single and radially by outside (among Fig. 4 B downwards) dislocation.In O shape circle 56 final each that are contained in fully in the mating groove 57, the outer surface 55A of the lining main body 55 of the second lining 12 contacts with the inboard interior perimeter surface 37 of housing 9, and above-mentioned gap S (referring to Fig. 3 B) is centering on whole circumferential disappearance.
In other words, under the top load state, for example the resin portion of the lining main body 55 of the lining main body 45 of the first lining 11 or the second lining 12 directly contacts with the interior perimeter surface 23 (perimeter surface 27 or inboard interior perimeter surface 37 in inboard) of housing 9, thereby absorbs top load.Therefore, the first lining 11 or the second lining 12 can not be radially further outside dislocation, thereby prevented that rack shaft 8 is in the radial direction bending.Therefore, the support stiffness of rack shaft 8 can be held under the top load state.
In addition, can not be radially outwards in the situation of dislocation at the first lining 11 or the second lining 12, O shape circle 46 or O shape circle 56 are fully compressed, and each the cross section in the O shape circle flexibly is deformed into elliptical shape (referring to Fig. 4 A and Fig. 4 B) from its original real round-shaped (referring to Fig. 3 A and Fig. 3 B).With reference to Fig. 2, the second lining 12 also has the function of the back lash in the mate (between the gear teeth 41 and the gear teeth 42) of eliminating between tooth bar 8A and the miniature gears 7A except the function of aforesaid supporting rack shaft 8.Particularly, the second lining 12 is c-shaped when side-looking as mentioned above, and is arranged in the pinion shaft 7 distance positions farthest in the recess 40 on the interior perimeter surface 23 of housing 9.In addition, in the second lining 12, O shape circle 56 is installed on the outer surface 55A (in the lining main body 55 apart from pinion shaft 7 distances side surface farthest) of lining main body 55, and compressed between the interior perimeter surface 23 of lining main body 55 and housing 9.Therefore, O shape circle 56 elastic forces by himself flexibly urge rack shaft 8 by lining main body 55 towards pinion shaft 7.
In this case, the second lining 12 is in axial direction X away from the position of the mate between rack shaft 8 and the pinion shaft 7 in the second end 92 sides.Therefore, the second lining 12 by with self as the point of action of power, another lining (the first lining 11) is used " lever principle " as the mate between fulcrum and rack shaft 8 and the pinion shaft 7 as the point of application, and can urge rack shaft 8 towards pinion shaft 7 with necessity and enough power thus.For effectively urging rack shaft 8 towards pinion shaft 7, as mentioned above, it is upper far away as much as possible apart from the mate between rack shaft 8 and the pinion shaft 7 that the second lining 12 preferably is positioned in axial direction X, with the point of action of increase power and the distance between the point of application.
In addition, in the second lining 12, single O shape circle 56 is assembled to (referring to Fig. 7 and Fig. 8) in two mating grooves 57.Therefore, only single O shape circle 56 urges rack shaft 8 by necessary and enough power towards pinion shaft 7 with the power that urges of two O shape circles 56 basically, thereby makes it possible to reduce the quantity of parts.On the other hand, also can not use the second lining 12 of lining main body 55 c-shaped when having this side-looking, and first lining 11 that can use the lining main body 45 that is O shape (cylindrical shape) when having side-looking is with towards pinion shaft 7 pushing rack axles 8.Yet, in this case, the first lining 11 must be arranged so that the first lining 11 at the part place pushing rack axle 8 that makes progress in week prejudicially with respect to rack shaft 8, perhaps must change the shape of inboard interior perimeter surface 27, thereby cause complicated configuration for such purpose.Yet, so that lining main body 55 forms C shape when side-looking, and so that for example the elastic component of O shape circle 56 be installed to simple on the outer surface 55A of lining main body 55 and cheaply the second lining 12 of configuration can urge rack shaft 8 towards pinion shaft 7.
The present invention is not limited to above-mentioned embodiment, and can make various remodeling within the scope of the claims.For example, the first lining 11 also can have the configuration identical with the second lining 12 (during side-looking c-shaped configuration), and the first lining 11 and the second lining 12 both can urge rack shaft 8 towards miniature gears 7A.In addition, although the second lining 12 has crooked O shape ring 56, but also the elastic body with the shape (for example, piece shape) except O shape circle can be installed on the outer surface 55A of lining main body 55, and the second lining 12 can urge rack shaft 8 towards pinion shaft 7 thus.
In addition, can be with common rack bush (the cylindrical shape rack bush that for example, does not have O shape circle 46) as the rack bush (being the first rack bush 11 here) that is arranged on apart from pinion shaft 7 off-site location.
Claims (8)
1. lining that is used for the rack shaft of supporting rack and pinion type steering swivel system, described lining is characterised in that and comprises:
C-shaped lining main body (55) when in axial direction observing, described lining main body (55) has in circumferential direction extends and is formed on mating groove on the outer surface of described lining main body (55), described lining main body (55) has the recess that extends in the axial direction, and the inside of the interior perimeter surface of the described rack shaft described lining main body of process (55) is inserted into; And
Be assemblied in the elastic component (56) in the described mating groove, described elastic component (56) has from the outstanding part of the described outer surface of described lining main body (55).
2. lining according to claim 1 also comprises:
Be arranged on the location division (60) in the described lining main body (55), outwards is giving prominence in the radial direction from an end in axial direction of described lining main body (55) described location division (60), and described location division (60) locate described lining main body (55) by engaging with the housing that holds described rack shaft in described steering swivel system.
3. lining according to claim 1 and 2, wherein:
Described elastic component (56) comprises O shape circle,
Described mating groove comprises two grooves that extend abreast along circumferential direction,
Place, two ends in described lining main body (55) on the circumferential direction of described two grooves arranges the locking part of the described O shape circle of locking, and
Single described O shape circle is locked and is assembled in described two grooves by the place, described two ends of described locking part on the circumferential direction of described two grooves.
4. a rack and pinion type steering swivel system comprises: pinion shaft; Be arranged on the rack shaft on the direction that intersects with described pinion shaft; Housing, described housing hold described pinion shaft and described rack shaft; And two linings, described two linings are arranged in and place described pinion shaft between described two linings in the described housing and support slidably described rack shaft, and described rack and pinion type steering swivel system is characterised in that:
At least one lining in described two linings comprises:
I) c-shaped lining main body (55) when in axial direction observing, described lining main body (55) is arranged between described rack shaft and the described housing at the place, an end of described housing, described lining main body (55) has in circumferential direction extends and is formed on mating groove on the outer surface, and described lining main body (55) has the recess that extends in the axial direction; And
Ii) elastic component (56), described elastic component (56) is assemblied in the described mating groove so that the part of described elastic component is outstanding from the described outer surface of described lining main body (55), described elastic component (56) is placed between described lining main body (55) and the described housing, and described elastic component (56) urges described rack shaft by described lining main body (55) towards described pinion shaft.
5. steering swivel system according to claim 4, wherein
Described at least one lining in described two linings comprises the location division (60) that is arranged in the described lining main body (55),
Outwards is giving prominence in the radial direction from an end on the axial direction of described lining main body (55) described location division (60), and
Described lining main body (55) is located by engaging with described housing in described location division (60).
6. according to claim 4 or 5 described steering swivel systems, wherein
Described elastic component (56) comprises O shape circle,
Described mating groove comprises two grooves that extend abreast along circumferential direction,
Place, two ends in described lining main body (55) on the circumferential direction of described two grooves arranges the locking part of the described O shape circle of locking, and
Single described O shape circle is locked and is assembled in described two grooves by the place, described two ends of described locking part on the circumferential direction of described two grooves.
7. according to claim 4 or 5 described steering swivel systems, wherein
Described lining with described lining main body (55) is arranged on the place, end of pinion shaft side in described housing.
8. according to claim 4 or 5 described steering swivel systems, wherein
The cut-out on circumferential direction that described lining with described lining main body (55) is configured such that c-shaped described lining main body (55) is in the radial direction towards the pinion shaft side.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011220743A JP2013079024A (en) | 2011-10-05 | 2011-10-05 | Bush for rack shaft and steering device of rack-and-pinion type |
| JP2011-220743 | 2011-10-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103029743A true CN103029743A (en) | 2013-04-10 |
Family
ID=48017270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103770517A Pending CN103029743A (en) | 2011-10-05 | 2012-10-08 | Bush for rack shaft and rack-pinion type steering device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2013079024A (en) |
| CN (1) | CN103029743A (en) |
Cited By (4)
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| CN105584518A (en) * | 2014-11-06 | 2016-05-18 | 株式会社捷太格特 | Rack Bush And Steering System |
| CN106467128A (en) * | 2015-08-21 | 2017-03-01 | 株式会社捷太格特 | Transfer |
| CN111332359A (en) * | 2018-12-19 | 2020-06-26 | 长城汽车股份有限公司 | Steering gear |
| CN112319598A (en) * | 2020-11-18 | 2021-02-05 | 浙江万洋汽车配件有限公司 | Automobile steering device and steering device mounting mechanism |
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| KR101809776B1 (en) * | 2013-05-08 | 2017-12-15 | 주식회사 만도 | Steering apparatus for vehicle |
| JP6150119B2 (en) * | 2013-07-22 | 2017-06-21 | 株式会社ジェイテクト | Rack bush |
| JP6444139B2 (en) * | 2014-11-06 | 2018-12-26 | 株式会社ジェイテクト | Steering device |
| JP7109289B2 (en) * | 2018-07-19 | 2022-07-29 | 日立Astemo株式会社 | Steering device and manufacturing method thereof |
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| US20080088104A1 (en) * | 2006-10-13 | 2008-04-17 | Arlt George E | Steering gear assembly having rack bushing |
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| JP4657590B2 (en) * | 2002-08-28 | 2011-03-23 | オイレス工業株式会社 | Sliding bearing and bearing mechanism including the same |
| JP5481777B2 (en) * | 2007-10-23 | 2014-04-23 | 株式会社ジェイテクト | Bearing mechanism with sliding bearing |
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| JP2008074218A (en) * | 2006-09-20 | 2008-04-03 | Jtekt Corp | Steering device |
| US20080088104A1 (en) * | 2006-10-13 | 2008-04-17 | Arlt George E | Steering gear assembly having rack bushing |
| CN101981349A (en) * | 2008-03-31 | 2011-02-23 | 奥依列斯工业株式会社 | Bush bearing, and automobile rack-and-pinion steering apparatus using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105584518A (en) * | 2014-11-06 | 2016-05-18 | 株式会社捷太格特 | Rack Bush And Steering System |
| CN106467128A (en) * | 2015-08-21 | 2017-03-01 | 株式会社捷太格特 | Transfer |
| CN111332359A (en) * | 2018-12-19 | 2020-06-26 | 长城汽车股份有限公司 | Steering gear |
| CN112319598A (en) * | 2020-11-18 | 2021-02-05 | 浙江万洋汽车配件有限公司 | Automobile steering device and steering device mounting mechanism |
| CN112319598B (en) * | 2020-11-18 | 2021-11-23 | 浙江万洋汽车配件有限公司 | Automobile steering device and steering device mounting mechanism |
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| JP2013079024A (en) | 2013-05-02 |
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Application publication date: 20130410 |