CN103635663A - Cam follower device - Google Patents
Cam follower device Download PDFInfo
- Publication number
- CN103635663A CN103635663A CN201280032184.9A CN201280032184A CN103635663A CN 103635663 A CN103635663 A CN 103635663A CN 201280032184 A CN201280032184 A CN 201280032184A CN 103635663 A CN103635663 A CN 103635663A
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- China
- Prior art keywords
- abutment wall
- inner ring
- supporting axle
- wall portion
- roller
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2305/00—Valve arrangements comprising rollers
- F01L2305/02—Mounting of rollers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Provided is a cam follower device having excellent durability, mountability, and design flexibility, and capable of achieving reductions in size, weight, and manufacturing cost. Both ends of a support shaft (3a) are relatively rotatably supported by support walls (12b, 12c) while being inserted through support holes (15b, 15c) of the support walls (12b, 12c). An inner ring (16) having an outer diameter (D16) larger than the inner diameter (d15) of the support holes (15b, 15c) is fitted onto the outer peripheral surface of an intermediate portion in the axial direction of the support shaft (9a) so as to be rotatable with the support shaft (9a). Further, a plurality of cylindrical rollers (13) are rollably disposed between an inner ring raceway (17) formed on the outer peripheral surface of the inner ring (16) and an outer ring raceway (18) formed on the inner peripheral surface of a tappet roller (8b) provided on the outer diameter side of the inner ring (16).
Description
Technical field
The present invention relates to the cam driven device that the valve operation mechanism of motor that automobile uses etc. packs into.
Background technique
As for the motion of the cam on the camshaft being fixed on the crankshaft-synchronous rotation of motor being delivered to the valve mechanism of valve, the cam driven device that has extensively adopted TOHKEMY 2006-183856 communique, TOHKEMY 2005-326023 communique etc. to record.Figure 12 and Figure 13 show the first case of structure in the past of the cam driven device of TOHKEMY 2006-183856 communique record.The main body of cam follower is that rocking arm 1 rotates freely on the cylinder cap (not shown) that is supported in motor by the pitman arm shaft 3 interting in the formed axis hole 2 of its length direction (left and right directions of Figure 12) intermediate portion.In addition, make to adjust bolt 4 and screw up the tapped hole in the base end part that is formed at rocking arm 1 (left part in Figure 12), and fastening by locking nut 5, thus, adjustment bolt 4 is fixed on to the base end part of rocking arm 1.And, allow to reciprocatingly be supported in the cardinal extremity face (upper-end surface in Figure 12) that suction valve on cylinder cap or outlet valve be engine valve 6 and be connected to the front-end face (lower end surface in Figure 12) of adjusting bolt 4.Engine valve 6 is biased to closing valve direction (with the direction of adjusting bolt 4 butts) all the time by Returnning spring 7.Therefore, the clockwise elastic force centered by pitman arm shaft 3 in Figure 12 is endowed rocking arm 1.
On the other hand, at the front end (right part in Figure 12) of rocking arm 1, via supporting axle 9 free rotary ground supporting tappet rollers 8, the elastic force based on Returnning spring 7, makes the outer circumferential face of tappet roller 8 and the outer circumferential face butt of cam 10.Cam 10 is formed on the camshaft 11 rotating linkedly with bent axle (not shown), rotates freely and is supported on cylinder cap.By such structure, the rotation of camshaft 11 is converted to the oscillating traverse motion of the rocking arm 1 centered by pitman arm shaft 3, then make the elastic force of engine valve 6 opposing Returnning springs 7 or move back and forth vertically based on elastic force by rocking arm 1.And, be arranged on the suction port of cylinder head or the on-off action of relief opening of motor.
In such valve mechanism, the part with respect to rocking arm 1 via supporting axle 9 free rotary ground supporting tappet rollers 8 forms as illustrated in fig. 13.At the front end of rocking arm 1, in a pair of abutment wall portion 12 that is spaced from each other that compartment of terrain arranges abreast, set up each other supporting axle 9.And, at the intermediate portion of supporting axle 9, in the inner side surface that is positioned at abutment wall portion 12 part each other around, by radial roller (needle roller) the bearing 14 free rotary ground supporting tappet rollers 8 that formed by many cylindrical rollers (needle roller) 13.The two end part of supporting axle 9 are fitted to be bearing in and are mutually arranged on one heart respectively the circular bearing hole 15 in abutment wall portion 12.Under this state, by the front-end edge of the riveting clamps such as drift being docked to the part of the close both ends of the surface external diameter of supporting axle 9, make this periphery edge, two ends radius vector plastic deformation laterally, thus, by supporting axle 9, with respect to bearing hole 15, combination is fixing securely.In addition, can also adopt the mono roller type that has omitted radial roller bearing 14 or the structures such as double-roll type that can be provided with the relative rotation columnar component between the inner peripheral surface of tappet roller and the outer circumferential face of supporting axle.About such structure, be described in TOHKEMY 2005-326023 communique, omit detailed explanation.
In the situation that the first case of structure in the past shown in Figure 12 and Figure 13, the length direction intermediate portion of rocking arm 1 of take is fulcrum, is provided with tappet roller 8 and for driving the adjustment bolt 4 of engine valve 6 at two end part.On the other hand, TOHKEMY 2009-79569 communique has been recorded following structure, as shown in Figure 14 and Figure 15, be fixed on supporting axle 9a on the length direction of rocking arm 1a (left and right directions of Figure 14 and Figure 15) intermediate portion around, can free rotary ground supporting tappet roller 8a by radial roller bearing 14.The two end part of supporting axle 9a are also fitted to be bearing in respectively and are mutually arranged on one heart in the circular bearing hole 15a on a pair of abutment wall 12a of portion.In the situation that such second case of structure in the past, under the assembled state to motor, the front end that becomes the hydraulic lash adjuster of fulcrum is docked to the one side (lower surface of the left part in Figure 14 and Figure 15) of an end of rocking arm 1a, the cardinal extremity of engine valve is faced to the one side (lower surface of the right part in Figure 14 and Figure 15) that is connected on the other end.
The in the situation that of any configuration, supporting axle 9(9a) intermediate portion outer circumferential face all has as supporting rotatably tappet roller 8(8a) the effect of inner race track of radial roller bearing 14, thereby easily make intermediate portion outer circumferential face damage etc., be not preferred.Therefore, by supporting axle 9(9a) be pressed into be formed at the 12(12a of abutment wall portion) bearing hole 15(15a) in structure from the viewpoint of atraumatic be disadvantageous.Therefore, in order to prevent supporting axle 9(9a) the damage of intermediate portion outer circumferential face, by heating supporting axle 9(9a) impregnated in the oily integral quenching (ズ Block baked I) of quenching use after whole, make supporting axle 9(9a) integrally curing.But, in the situation of integral quenching, due to supporting axle 9(9a) integrally curing, so to supporting axle 9(9a) two end part while riveting expansion (か め Expansion げ Ru), be pressed against supporting axle 9(9a) both ends of the surface on the front end damage etc. of the fixtures such as drift, and need to change continually.Its result, processing cost raises, and may cause the rising of the manufacture cost of cam driven device.
For such problem, at supporting axle 9(9a) two end part residual unprocessed (unhardened) part, only intermediate portion outer circumferential face is implemented to solidify by high frequency hardening.But high frequency hardening self becomes the reason that processing cost raises.In addition, the direct supporting axle 9(9a that adopts) it is limited that the durability of the fixture that uses in the operation of expansion is riveted at ，Dui two end part, two end part undressedly, can not suppress processing cost, even if used high frequency hardening, can not realize the manufacture cost that suppresses fully cam driven device.
In addition, in the cam driven device of in the past constructing, as being arranged on tappet roller 8(8a) inner peripheral surface and supporting axle 9(9a) intermediate portion outer circumferential face between radial roller bearing 14, in order to ensure load capacity, mostly use does not have the full type roller bearing of retainer.In the situation that combine the cam driven device of such structure, first, to tappet roller 8(8a) inner peripheral surface and be disposed at tappet roller 8(8a) the outer circumferential face of spindle unit (shotpin) of internal side diameter between space in, assembled configuration the roller assembly body of many cylindrical rollers.
Secondly, so that the both ends of the surface of shotpin and the 12(12a of abutment wall portion) bearing hole 15(15a) state of coupling is configured in the 12(12a of abutment wall portion by roller assembly body) and width direction inner side surface each other.Then, by supporting axle 9(9a) from a side the 12(12a of abutment wall portion) width direction outside insert the 12(12a of abutment wall portion) a side the 12(12a of abutment wall portion) bearing hole 15(15a).Then, by supporting axle 9(9a) release shotpin, and, by supporting axle 9(9a) be pressed into until the opposing party's the 12(12a of abutment wall portion is inserted in one end) bearing hole 15(15a).And, to supporting axle 9(9a) two end part rivet expansion.Under this state, supporting axle 9(9a) with respect to the 12(12a of abutment wall portion) to stop counterrotating state to be supported.In the situation that such structure, release shotpin, and, by supporting axle 9(9a) insert tappet roller 8(8a) the operation of internal side diameter be trouble.In addition, and use shotpin correspondingly, the part number of mounting equipment and assembling increase man-hour, and cost raises.
In addition, external diameter supporting axle 9(9a) and the 12(12a of abutment wall portion) bearing hole 15(15a) the inscribe diameter of a circle of internal diameter based on forming the cylindrical roller 13 of radial roller bearing 14 determine.Thus, to supporting axle 9(9a) and the 12(12a of abutment wall portion) relevant design freedom is low.And, in the situation that the inscribe diameter of a circle of the cylindrical roller 13 of formation radial roller bearing 14 is large, for corresponding with inscribe diameter of a circle, need to increase supporting axle 9(9a) whole external diameter.Thus, the possibility that exists weight to raise.And, supporting axle 9(9a) with respect to the 12(12a of abutment wall portion) to stop counterrotating state to be supported, thereby supporting axle 9(9a) load ring be limited in certain scope.That is to say, at supporting axle 9(9a) in the radial load that acts in use of identical position load (supporting) all the time.Its result, at load bearing axle 9(9a) the part imposed load repeatedly of radial load, the possibility that exists durability to reduce.In addition, above-mentioned prior art document all merges in this specification as a reference.
Prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2006-183856 communique
Patent documentation 2: TOHKEMY 2005-326023 communique
Patent documentation 3: TOHKEMY 2009-79569 communique
Summary of the invention
The problem that invention will solve
The present invention In view of the foregoing, its objective is the structure of realizing a kind of cam driven device, and durability, assembling performance, design freedom are all good, can realize miniaturization and lightweight, and can realize the reduction of manufacture cost.
Cam driven device of the present invention has rocking arm, supporting axle, the suitable parts of inner ring and tappet roller.Rocking arm wherein have to be spaced from each other interval state setting a pair of abutment wall portion and be formed on a pair of bearing hole of the position of mutually mating with these abutment wall portions, this rocking arm relatively arranges with the cam on the camshaft being fixed on the crankshaft-synchronous rotation of motor, is subject to the motion of this cam and swings displacement.In addition, described supporting axle is the state interting in described a pair of bearing hole with its two end part, is erected at described a pair of abutment wall portion each other, is supported thus by these abutment wall portions.The suitable parts of described inner ring have the external diameter larger than the internal diameter of described bearing hole, to be prevented from the counterrotating state with respect to this supporting axle, are embedded in the axial intermediate portion of described supporting axle with interference fit outward.And described tappet roller can be configured in the suitable parts of described inner ring around with the relative rotation with respect to the suitable parts of this inner ring.
Preferably, the two end part of described supporting axle can be embedded in Spielpassung in described a pair of bearing hole rotatably in the inner side of these bearing hole.In addition, preferably, between the inner peripheral surface of described tappet roller and the outer circumferential face of the suitable parts of described inner ring, radial roller bearing is set.In this case, preferably, by full type roller bearing, form described radial roller bearing.
Preferably, in the situation that described radial roller bearing consists of full type roller bearing, width direction inner side in described abutment wall portion, to stop up the state of both ends open portion of the bearing space of described radial roller bearing, is respectively arranged with circular a pair of packing ring.In this case, the external diameter of these packing rings is larger than the size of the short transverse about these abutment wall portions of described abutment wall portion.
As the structure of cam driven device of the present invention, can also adopt the structure of the double-roll type that makes the inner peripheral surface of described tappet roller and the outer circumferential face sliding contact of the suitable parts of described inner ring.In this situation, identical with mono roller type in function.Instead, can also adopt and can with the relative rotation cartridge be configured in respect to this tappet roller and the suitable parts of inner ring to the structure of the three-roller type between the inner peripheral surface of described tappet roller and the outer circumferential face of the suitable parts of described inner ring.In this case, identical with double-roll type in function.
The effect of invention
According to the present invention, realize a kind of structure of cam driven device, durability, assembling performance, design freedom are all good, can realize miniaturization and lightweight, and can realize the reduction of manufacture cost.
The raising of durability is by the Quenching Treatment of supporting axle whole implementation integral quenching is realized.In the present invention, owing to not needing the two end part to supporting axle to rivet, so can carry out by integral quenching the quenching of supporting axle.Its result, can guarantee intensity and the rigidity of supporting axle integral body fully, and can effectively prevent the radial load that supporting axle is subject to when using and plastic deformation occurs.
In addition, so that with respect to abutment wall portion, state supports supporting axle with the relative rotation in the situation that, the load ring of supporting axle is not limited in certain scope.Its result, can prevent from repeatedly, at the same position imposed load of supporting axle, can realizing the long lifetime of supporting axle.
And, even in the situation that forming radial roller bearing by full type roller bearing, by a pair of circular packing ring is set, also can prevents the width direction inner side surface of supporting board and cylindrical roller friction and wear and tear, thereby can realize the long lifetime of abutment wall portion.
And, by reducing the size in the short transverse of abutment wall portion of abutment wall portion, can reduce the area of the part at axial overlap between the width direction inner side surface of abutment wall portion and the axial both ends of the surface of tappet roller, lubricant oil becomes and easily from outside, enters in the inner space (bearing space) of radial roller bearing.Thus, can realize the long lifetime of cam driven device.
The raising of assembling performance realizes by the suitable parts of inner ring are set.; by assembled inner ring suitable parts, tappet roller, other component parts (for example; form the cylindrical roller of radial roller bearing) etc. roller assembly body be configured under abutment wall portion state each other, the bearing hole of abutment wall portion that supporting axle can be interted successively a side is, assemble in the bearing hole of the inner peripheral surface of the suitable parts of inner ring, the opposing party's abutment wall portion.Thus, as constructed, do not need the such operation of shotpin of inserting the internal side diameter that is configured in tappet roller for releasing by supporting axle in the past.
The raising of design freedom also realizes by the suitable parts of inner ring are set.That is, make the inscribe diameter of a circle of the external diameter of the suitable parts of inner ring and the cylindrical roller of radial roller bearing corresponding, and the internal diameter of the bearing hole of the internal diameter of the suitable parts of inner ring and the external diameter of supporting axle and abutment wall portion is suitably set accordingly.
Miniaturization and lightweight also realize by the suitable parts of inner ring are set.That is,, by the internal diameter of the suitable parts of change inner ring, can reduce the external diameter of supporting axle, thereby in the bearing hole of abutment wall portion around, footpath in bearing hole makes progress, and guarantees certain width dimensions, and can reduce the size in the short transverse of abutment wall portion of abutment wall portion.Its result, can guarantee desired rigidity, and can realize abutment wall portion to such an extent as to miniaturization and the lightweight of rocking arm integral body.
In addition, in the situation that be provided with a pair of circular packing ring, by these packing rings, can prevent that the cylindrical roller that forms radial roller bearing from departing from vertically from bearing space, thereby can further reduce the size in short transverse of abutment wall portion.
The reduction of manufacture cost is to rivet operation, by integral quenching, carried out the Quenching Treatment of supporting axle and do not needed shotpin to realize by not needing.
Accompanying drawing explanation
Fig. 1 means first case suitable with the B-B cross section of A-A Figure 12 cross section or Figure 14 figure of embodiments of the present invention.
Fig. 2 means the figure same with Fig. 1 of the second case of embodiments of the present invention.
Fig. 3 means the figure same with Fig. 1 of the 3rd example of embodiments of the present invention.
Fig. 4 means the figure same with Fig. 1 of the 4th example of embodiments of the present invention.
Fig. 5 is the figure observing from the side of Fig. 4.
Fig. 6 means the figure same with Fig. 1 of the 5th example of embodiments of the present invention.
Fig. 7 is the figure observing from the side of Fig. 6.
Fig. 8 means the figure same with Fig. 1 of the 6th example of embodiments of the present invention.
Fig. 9 is the figure observing from the side of Fig. 8.
Figure 10 means the figure same with Fig. 1 of the 7th example of embodiments of the present invention.
Figure 11 is the figure observing from the side of Figure 10.
Figure 12 means the side view of the first case of the cam driven device of structure in the past.
Figure 13 is the amplification C-C sectional view of Figure 12.
Figure 14 means the side view of the second case of the cam driven device of structure in the past.
Figure 15 is the figure observing from the top of Figure 14.
Embodiment
［ first case of mode of execution ］
Fig. 1 shows the first case of embodiments of the present invention.Comprise this example interior, the feature of cam driven device of the present invention is, supporting axle 9b to the supporting construction of the 12b of abutment wall portion, 12c and between supporting axle 9b and tappet roller 8b, to be provided with the suitable parts of inner ring be inner ring 16.The structure of the cam driven device beyond characteristic of the present invention and to the state of the assembling of this motor comprise in being configured in shown in Figure 12～Figure 15 with constructed in the past roughly the same, thereby omit or simplify these explanations, below, centered by this routine characteristic, describe.
This routine cam driven device has rocking arm 1b, supporting axle 9b, the suitable parts of inner ring are inner ring 16, tappet roller 8b and a plurality of cylindrical roller 13.Rocking arm 1b has to be spaced from each other a pair of abutment wall 12b of portion, the 12c that the state at interval arranges, and in the position of the mutual coupling of the 12b of these abutment wall portions, 12c, is formed with a pair of bearing hole 15b, 15c.In the situation that this routine cam driven device, by the two end part of steel and hollow or solid supporting axle 9b across micro-gap intert under the bearing hole 15b of the 12b of abutment wall portion, the 12c of steel, state (Spielpassung) in 15c, supporting axle 9b is erected to the 12b of abutment wall portion, 12c each other, thus, can be bearing in the relative rotation on the 12b of abutment wall portion, 12c.That is, the outer diameter D of supporting axle 9b
9than the inner diameter d of bearing hole 15b, 15c
15slightly little (D
9< d
15).
In order to guarantee fully whole intensity and the rigidity of supporting axle 9b, by impregnated in the oily integral quenching of quenching use after the whole heating of supporting axle 9b, make supporting axle 9b integrally curing.But the quenching of implementing by integral quenching raises processing cost, can also be at the two end part of supporting axle 9b residual unprocessed part, and only intermediate portion outer circumferential face solidifies by high frequency hardening.In addition, on the inner peripheral surface of bearing hole 15b, 15c, implement the curing processing such as quenching, thus, the sliding contacting part between the inner peripheral surface of bearing hole 15b, 15c and the outer circumferential face at the two end part of supporting axle 9b, generation that can also wear prevention equivalent damage.In addition, between the outer circumferential face at two end part and the inner peripheral surface of bearing hole 15b, 15c of supporting axle 9b, the plain bearing element of ring-type can also be set.On the other hand, in this example, by the two end part of supporting axle 9b being pressed into bearing hole 15b, the 15c of (embedded with interference fit) abutment wall 12b of portion, 12c, can also adopting and stop supporting axle 9b with respect to the structure of the rotation of the 12b of abutment wall portion, 12c.
At the outer circumferential face of the axial intermediate portion of supporting axle 9b, by interference fit, to stop outside the counterrotating state (state that can rotate) with respect to supporting axle 9b, be embedded with columned inner ring 16 together with supporting axle 9b.The outer diameter D of inner ring 16
16than the inner diameter d of bearing hole 15b, 15c
15(D greatly
16> d
15).Like this, realize supporting axle 9b with respect to the axial anticreep of the 12b of abutment wall portion, 12c.In addition, make the axial intermediate portion of supporting axle, to radially giving prominence to, large-diameter portion is set, can also be using the large-diameter portion of supporting axle as the suitable parts performance of inner ring function.
On the outer circumferential face of inner ring 16, be formed with inner race track 17.In addition, in surrounding's (outside diameter) of inner ring 16, concentric and can dispose with the relative rotation tappet roller 8b with respect to inner ring 16 with inner ring 16.In addition, the inner peripheral surface at tappet roller 8b is formed with outer race track 18.And, between inner race track 17 and outer race track 18, dispose a plurality of cylindrical rollers 13 Free-rolling, form thus radial roller bearing 14a.In addition, in this example, although form radial roller bearing 14a by the full type roller bearing of retainer is not set, as cylindrical roller, can also use the cylindrical roller with retainer.
In the situation that this routine cam driven device of assembling, first, at the inner peripheral surface of tappet roller 8b be arranged on the space (bearing space 21) between the outer circumferential face of inner ring 16 of internal side diameter of tappet roller 8b, be assembled with the roller assembly body 19 that has configured a plurality of cylindrical rollers 13.Secondly, so that the width direction inner side surface that the state of the axial both ends open portion of the inner peripheral surface of inner ring 16 and bearing hole 15b, the 15c of the 12b of abutment wall portion, 12c coupling is configured in the 12b of abutment wall portion, 12c by roller assembly body 19 each other.Then, the bearing hole 15b of this side's of the width direction of the 12b of abutment wall portion of the side from the 12b of abutment wall portion, 12c outside insertion the 12b of abutment wall portion by supporting axle 9b.And, supporting axle 9b is pressed into the inner peripheral surface (embedded with interference fit) of inner ring 16, and, be pressed into supporting axle 9b, until one end (left part in Fig. 1) inserts the bearing hole 15c of the opposing party's the 12c of abutment wall portion.Under this state, at the outer circumferential face at the two end part of supporting axle 9b and the 12b of abutment wall portion, the bearing hole 15b of 12c, be provided with micro-gap between the inner peripheral surface of 15c.In addition, the direction of assembling supporting axle 3a also can be contrary.
In this routine cam driven device, guarantee that durability is to realize by implement on the whole the Quenching Treatment of integral quenching at supporting axle 9b.That is, the in the situation that of cam driven device of the present invention, by making the outer diameter D of inner ring 16
16than the 12b of abutment wall portion, the bearing hole 15b of 12c, the inner diameter d of 15c
15realize supporting axle 9b with respect to the axial anticreep of the 12b of abutment wall portion, 12c greatly.Therefore, do not need the two end part of supporting axle 9b to rivet, do not need to make the two end part of supporting axle 9b to become unprocessed state (not implementing to solidify the state of processing) yet.Thus, the quenching of supporting axle 9b can be undertaken by heating the whole oily integral quenching that impregnated in quenching use afterwards.Its result, owing to can guaranteeing fully intensity and the rigidity of supporting axle 9b integral body, so the radial load generation plastic deformation being subject in the time of can effectively preventing supporting axle 9b based on use.
In addition, in this routine cam driven device, by supporting axle 9b can support by counterrotating state with respect to the 12b of abutment wall portion, 12c.Thus, the load ring of supporting axle 9b is not limited in certain scope.That is, in use, the position of the supporting axle 9b of load radial load can be not identical all the time.Its result, can prevent from repeatedly, at the same position imposed load of supporting axle 9b, can realizing the long lifetime of supporting axle 9b.
In this routine cam driven device, improve assembling performance and realize by inner ring 16 is set.; roller assembly body 19 is being configured under the 12b of abutment wall portion, 12c state each other, supporting axle 9b can be interted successively a side the bearing hole 15b of the 12b of abutment wall portion, the bearing hole 15c of the inner peripheral surface of inner ring 16, the opposing party's the 12c of abutment wall portion assemble.Thus, do not need as structure in the past like that, for by supporting axle 9(9a) release inserts and is configured in tappet roller 8(8a) the such operation of shotpin of the internal side diameter of (with reference to Figure 12～Figure 15).
In this routine cam driven device, the degrees of freedom that improves design also realizes by inner ring 16 is set.That is,, in structure in the situation that in the past, because forming the inscribe diameter of a circle of the cylindrical roller 13 of radial roller bearing 14, limited supporting axle 9(9a) external diameter and the 12(12a of abutment wall portion) bearing hole 15(15a) internal diameter.On the other hand, in situation of the present invention, make the outer diameter D of inner ring 16
16corresponding with the inscribe diameter of a circle of cylindrical roller 13 that forms radial roller bearing 14a, and can suitably set accordingly the inner diameter d of inner ring 16 with the external diameter of supporting axle 9b
16.Its result, can realize the external diameter of supporting axle 9b and the 12b of abutment wall portion, the bearing hole 15b of 12c, the raising of the degrees of freedom of the design of the internal diameter of 15c.
Follow the raising of the degrees of freedom of such design, as long as can realize the miniaturization of supporting axle 3a and the 4a of abutment wall portion, 4b, just can improve the lubricity of radial roller bearing 14a.That is, follow the path of supporting axle 3a, can reduce the size H relevant to their short transverses of the 12b of abutment wall portion, 12c
12thereby, can reduce the area at axial lap between the width direction inner side surface of the 12b of abutment wall portion, 12c and the axial both ends of the surface of tappet roller 8b.Thus, it is easy of the part between the width direction inner side surface of the 12b of abutment wall portion, 12c and the axial both ends of the surface of tappet roller 8b that lubricant oil becomes, and enters in the bearing space that disposes cylindrical roller 21 of radial roller bearing from outside.
In this routine cam driven device, miniaturization and lightweight also realize by inner ring 16 is set.That is, the 12b of abutment wall portion, 12c be in order to ensure desired rigidity, need to, at bearing hole 15b, 15c radially, guarantee the width dimensions L of regulation at bearing hole 15b, the 15c of the 12b of abutment wall portion, 12c around
12.In the case of this example, by the inner diameter d of change inner ring 16
16, can reduce the outer diameter D of supporting axle 9b
9.Thus, at bearing hole 15b, 15c radially, guarantee certain width dimensions at bearing hole 15b, the 15c of the 12b of abutment wall portion, 12c around,, and, can reduce the size H of the short transverse about them (above-below direction in Fig. 1) of the 12b of abutment wall portion, 12c
12.Its result, can realize the 12b of abutment wall portion, 12c so that miniaturization and the lightweight of rocking arm 1b integral body.
And the manufacture of the cam driven device that this is routine does not need to rivet operation, thereupon, do not need to be used to form the fixtures such as drift of caulking part yet.In addition, for solidifying the cost of the Quenching Treatment of supporting axle 9b, than high frequency hardening, process lowly, can implement by integral quenching.And, when assembling, do not need shotpin.Thus, can realize the reduction of processing cost and cost of parts, and then realize the reduction of the manufacture cost of cam driven device integral body.
［ second case of mode of execution ］
Fig. 2 shows the second case of embodiments of the present invention.In the situation that this routine cam driven device, make the inner ring 16a on the outer circumferential face of the outer axial intermediate portion that is embedded in supporting axle 9b outer circumferential face, with can counterrotating state with respect to inner ring 16a to be arranged on the inner peripheral surface sliding contact of tappet roller 8b of the outside diameter of inner ring 16a.In addition, the first case of the shape of tappet roller 8b and size and mode of execution is roughly the same.
That is, this routine cam driven device has the structure of so-called double-roll type of the radial roller bearing 14a of the first case that has omitted mode of execution.Wherein, form the inner ring 16 of the inner ring 16a of this routine cam driven device and the first case of mode of execution similarly, with (prevention is counterrotating with respect to the supporting axle 9b's) state that can rotate, with interference fit, be embedded in the outer circumferential face of the axial intermediate portion of supporting axle 9b outward together with supporting axle 9b.Therefore,, from functional viewpoint, this routine cam driven device is as the cam driven device performance function of so-called mono roller type.Other structures, effect and the effect of this example are identical with the first case of mode of execution.
［ the 3rd example of mode of execution ］
Fig. 3 shows the 3rd example of embodiments of the present invention.In the situation that this routine cam driven device, being embedded in outside between the outer circumferential face of inner ring 16 and the inner peripheral surface of tappet roller 8b on the outer circumferential face of axial intermediate portion of supporting axle 9b, is internal side diameter roller 20 being provided with cartridge with respect to inner ring 16 and the counterrotating state of tappet roller 8b.In addition, the shape of tappet roller 8b and inner ring 16 and the first case of size and mode of execution are roughly the same.
That is, this routine cam driven device has the radial roller bearing 14a of the first case that replaces mode of execution and is provided with the structure of the so-called three-roller type of internal side diameter roller 20.Wherein, the inner ring 16 that forms this routine cam driven device also with the first case of mode of execution similarly to stop counterrotating (can rotate together with the supporting axle 9b) state with respect to supporting axle 9b to be embedded in the outer circumferential face of the axial intermediate portion of supporting axle 9b outward.Therefore,, from functional viewpoint, this routine cam driven device is as the cam driven device performance function of so-called double-roll type.Other structures, effect and the effect of this example are identical with the first case of mode of execution.
［ the 4th example of mode of execution ］
Fig. 4 and Fig. 5 show the 4th example of embodiments of the present invention.In the situation that this routine cam driven device, axially, is provided with hard metal system or plastic circular a pair of packing ring 22 between a pair of abutment wall 12d of portion, the width direction inner side surface of 12e and the axial both ends of the surface of inner ring 16.In addition, the outer diameter D of packing ring 22
22than the inner diameter d of tappet roller 8b
8(D greatly
22> d
8).That is, packing ring 22 is to be set up disposing the state that the axial both ends open portion of the bearing space 21 of the cylindrical roller 13 that forms radial roller bearing 14a stops up.In addition, in the case of this example, the outer diameter D of packing ring 22
22than the size H about short transverse (above-below direction in Fig. 4 and Fig. 5) of the 12d of abutment wall portion, 12e
12d(D greatly
22> H
12d).
According to this routine cam driven device, compare with the structure of the first case of mode of execution, can realize further miniaturization and lightweight.That is, in the case of this example, by packing ring 22, stop up the axial both ends open portion of bearing spaces 21, can prevent that cylindrical roller 13 from departing from vertically from this bearing space 21.Thus, do not need by the 12d of abutment wall portion, 12e realize cylindrical roller 13 at axial anticreep.Its result, can reduce the size H about short transverse of the 12d of abutment wall portion, 12e
12d, and can realize and comprise the 12d of abutment wall portion, 12e in miniaturization and the lightweight of interior rocking arm.
In addition, in the case of this example, by packing ring 22, stop up the axial both ends open portion of bearing spaces 21.Thus, can prevent that the width direction inner side surface of supporting board 12d, 12e and the roller 13 that forms radial roller bearing 14a from rubbing and the wearing and tearing of generation, can realize the long lifetime of the 12d of abutment wall portion, 12e.Other structures, effect and the effect of this example are identical with the first case of mode of execution.
［ the 5th example of mode of execution ］
Fig. 6 and Fig. 7 show the 5th example of embodiments of the present invention.In the situation that this routine cam driven device, make inner ring 16b at axial size L
16bthan the inner ring 16(of the first case of mode of execution with reference to Fig. 1) at axial size L
16(L greatly
16b> L
16).On the other hand, the first case of the shape of tappet roller 8b and size and mode of execution is roughly the same.Therefore, the axial two-end part of inner ring 16b is in more leaning on the position in width direction outside than the axial two end part of tappet roller 8b.
In addition, the 12d of abutment wall portion, 12e than width direction inner side surface more by the position of width direction inner side, and (the axial both ends of the surface of ratio of tappet roller 8b are more by the part in width direction outside) is provided with a pair of circular packing ring 22a at the axial two end part of the outer circumferential face of inner ring 16b.The outer diameter D of packing ring 22a
22athan the inner diameter d of tappet roller 8b
8(D greatly
22a> d
8).Therefore, packing ring 22a is to be set up disposing the state that the axial both ends open portion of the bearing space 21 of the cylindrical roller 13 that forms radial roller bearing 14b stops up.
In this example, the outer diameter D of packing ring 22a
22aalso than the size H in the short transverse at the 12d of abutment wall portion, 12e of the 12d of abutment wall portion, 12e (Fig. 6,7 above-below direction)
12d(D greatly
22a> H
12d).Other structures, effect and the effect of this example is identical with the 4th example of mode of execution.
［ the 6th example of mode of execution ］
Fig. 8 and Fig. 9 show the 6th example of embodiments of the present invention.In the situation that this routine cam driven device, make tappet roller 8c at axial size L
8cthan the tappet roller 8b of the first case of mode of execution at axial size L
8(L greatly
8c> L
8).On the other hand, the first case of the shape of inner ring 16 and size and mode of execution is roughly the same.Therefore, the axial two-end part of tappet roller 8c is in more leaning on the position in width direction outside than the axial two end part of inner ring 16.
In addition, internal side diameter at the axial two end part of tappet roller 8c (the axial both ends of the surface of ratio of inner ring 16 are more leaned on the part in width direction outside), and the outer circumferential face of supporting axle 9b axially, the part between the width direction inner side surface of the 12d of abutment wall portion, 12e and the axial both ends of the surface of inner ring 16 is provided with a pair of circular packing ring 22b.In addition, the outer diameter D of packing ring 22b
22bthan the inner diameter d of tappet roller 8c
8slightly little (D
22b< d
8).That is, packing ring 22b is to be set up disposing the state that the axial both ends open portion of the bearing space 21 of the cylindrical roller 13 that forms radial roller bearing 14c stops up.
In the case of this example, the outer diameter D of packing ring 22b
22balso than the size H in the short transverse of the 12d of abutment wall portion, 12e of the 12d of abutment wall portion, 12e
12d(D greatly
22b> H
12d).Other structures, effect and the effect of this example is identical with the 4th example of mode of execution.
［ the 7th example of mode of execution ］
Figure 10 and Figure 11 show the 7th example of embodiments of the present invention.In the situation that this routine cam driven device, the inner ring 16b(of the 5th example of combination mode of execution is with reference to Fig. 6) and the tappet roller 8c(of the 6th example of mode of execution with reference to Fig. 8) formed radial roller bearing 14d.That is, in the case of this example, make tappet roller 8c at axial size L
8cthan the tappet roller 8b(of the first case of mode of execution with reference to Fig. 1) at axial size L
8(L greatly
8c> L
8), and make inner ring 16b at axial size L
16bthan the inner ring 16(of the first case of mode of execution with reference to Fig. 1) at axial size L
16(L greatly
16b> L
16).In addition, tappet roller and inner ring identical with the first case of mode of execution in axial size, can also make cylindrical roller in axial size than the cylindrical roller 13(of the first case of this mode of execution with reference to Fig. 1) little.
In addition, between the axial two end part of outer circumferential face of inner ring 16b and the axial two end part of the inner peripheral surface of tappet roller 8c, be provided with a pair of circular packing ring 22c.That is, packing ring 22c is to be set up disposing the state that the axial both ends open portion of the bearing space 21 of the cylindrical roller 13 that forms radial roller bearing 14d stops up.In addition, in the case of this example, can also replace packing ring 22c and use retainer.
In the case of this example, the outer diameter D 22c of packing ring 22c is also than the size H in the short transverse at the 12d of abutment wall portion, 12e of the 12d of abutment wall portion, 12e (Figure 10,11 above-below direction)
12d(D greatly
22c> H
12d).Other structures, effect and the effect of this example is identical with the 4th example of mode of execution.
The explanation of reference character
1,1a, 1b rocking arm
2 axis holes
3 pitman arm shafts
4 adjust bolt
5 locking nuts
6 engine valves
7 Returnning springs
8,8a, 8b tappet roller
9,9a, 9b, 9c supporting axle
10 cams
11 camshafts
12,12a, 12b, 12c, 12d, 12e abutment wall portion
13 cylindrical rollers
14,14a, 14b, 14c, 14d radial roller bearing
15,15a, 15b, 15c, 15d, 15e bearing hole
16,16a, 16b inner ring
17 inner race tracks
18 outer race tracks
19 roller assembly bodies
20 internal side diameter rollers
21 bearing spaces
22,22a, 22b, 22c packing ring
Claims (according to the modification of the 19th of treaty)
After 1.[revises] a kind of cam driven device, it is characterized in that having:
Rocking arm, its have to be spaced from each other interval state setting a pair of abutment wall portion and be formed on a pair of bearing hole of the position of mutually mating with these abutment wall portions, described rocking arm relatively arranges with the cam on the camshaft being fixed on the crankshaft-synchronous rotation of motor, and is subject to the motion of this cam and swings displacement;
Supporting axle, it has the external diameter slightly less than the internal diameter of bearing hole, by the two end part of this supporting axle across micro-gap under the state that interts in described a pair of bearing hole, be erected at described a pair of abutment wall portion each other, thus, can be supported in the relative rotation in these abutment wall portions;
The suitable parts of inner ring, it has the external diameter larger than the internal diameter of described bearing hole, to be prevented from being embedded in the axial intermediate portion of described supporting axle outward with interference fit with respect to the counterrotating state of this supporting axle; With
Tappet roller, can be configured in the suitable parts of described inner ring around with the relative rotation with respect to the suitable parts of this inner ring.
2.[deletes]
3. cam driven device as claimed in claim 1, is characterized in that, between the inner peripheral surface of described tappet roller and the outer circumferential face of the suitable parts of described inner ring, is provided with radial roller bearing.
4. cam driven device as claimed in claim 3, is characterized in that, by full type roller bearing, forms described radial roller bearing.
5. cam driven device as claimed in claim 4, it is characterized in that, width direction inner side in described a pair of abutment wall portion, to stop up the state of both ends open portion of the bearing space of described radial roller bearing, be provided with a pair of circular packing ring, this pair of circular packing ring has than the large external diameter of size of the short transverse about these abutment wall portions of described abutment wall portion.
6. cam driven device as claimed in claim 1, is characterized in that, the outer circumferential face sliding contact of the inner peripheral surface of described tappet roller and the suitable parts of described inner ring.
7. cam driven device as claimed in claim 1, is characterized in that, between the inner peripheral surface of described tappet roller and the outer circumferential face of the suitable parts of described inner ring, cartridge can configure with the relative rotation with respect to this tappet roller and the suitable parts of inner ring.
Claims (7)
1. a cam driven device, is characterized in that, has:
Rocking arm, its have to be spaced from each other interval state setting a pair of abutment wall portion and be formed on a pair of bearing hole of the position of mutually mating with these abutment wall portions, described rocking arm relatively arranges with the cam on the camshaft being fixed on the crankshaft-synchronous rotation of motor, is subject to the motion of this cam and swings displacement;
Supporting axle, it is erected at described a pair of abutment wall portion each other under the state that its two end part are interted in described a pair of bearing hole, is supported in thus in these abutment wall portions;
The suitable parts of inner ring, it has the external diameter larger than the internal diameter of described bearing hole, to be prevented from being embedded in the axial intermediate portion of described supporting axle outward with interference fit with respect to the counterrotating state of this supporting axle; With
Tappet roller, can be configured in the suitable parts of described inner ring around with the relative rotation with respect to the suitable parts of this inner ring.
2. cam driven device as claimed in claim 1, is characterized in that, the two end part of described supporting axle can be embedded in Spielpassung in described a pair of bearing hole rotatably in the inner side of these bearing hole.
3. cam driven device as claimed in claim 1, is characterized in that, between the inner peripheral surface of described tappet roller and the outer circumferential face of the suitable parts of described inner ring, is provided with radial roller bearing.
4. cam driven device as claimed in claim 3, is characterized in that, by full type roller bearing, forms described radial roller bearing.
5. cam driven device as claimed in claim 4, it is characterized in that, width direction inner side in described a pair of abutment wall portion, to stop up the state of both ends open portion of the bearing space of described radial roller bearing, be provided with a pair of circular packing ring, this pair of circular packing ring has than the large external diameter of the size in the short transverse of these abutment wall portions of described abutment wall portion.
6. cam driven device as claimed in claim 1, is characterized in that, the outer circumferential face sliding contact of the inner peripheral surface of described tappet roller and the suitable parts of described inner ring.
7. cam driven device as claimed in claim 1, is characterized in that, between the inner peripheral surface of described tappet roller and the outer circumferential face of the suitable parts of described inner ring, cartridge can configure with the relative rotation with respect to this tappet roller and the suitable parts of inner ring.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012008575 | 2012-01-19 | ||
| JP2012-008575 | 2012-01-19 | ||
| JP2012040874A JP2013167236A (en) | 2012-01-19 | 2012-02-28 | Cam follower device |
| JP2012-040874 | 2012-02-28 | ||
| PCT/JP2012/071726 WO2013108433A1 (en) | 2012-01-19 | 2012-08-28 | Cam follower device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103635663A true CN103635663A (en) | 2014-03-12 |
Family
ID=48798870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280032184.9A Pending CN103635663A (en) | 2012-01-19 | 2012-08-28 | Cam follower device |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20130291817A1 (en) |
| EP (1) | EP2806117A1 (en) |
| JP (1) | JP2013167236A (en) |
| KR (1) | KR20140015562A (en) |
| CN (1) | CN103635663A (en) |
| WO (1) | WO2013108433A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884752A (en) * | 2015-12-03 | 2017-06-23 | 斯凯孚公司 | With the cam driven roller arrangement for strengthening lifter body |
| CN107345491A (en) * | 2016-05-04 | 2017-11-14 | 斯凯孚公司 | Cam driven roller apparatus |
| CN107923269A (en) * | 2015-06-11 | 2018-04-17 | 伊顿公司 | For the effect force transfering device and its manufacture method being used together with valve mechanism |
| CN111706415A (en) * | 2019-03-18 | 2020-09-25 | 欧德克斯有限公司 | Support structure for assembled camshaft |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3015597B1 (en) * | 2013-12-23 | 2016-12-23 | Skf Ab | FOLLOWING ROLL DEVICE OF A CAM |
| US20150198230A1 (en) * | 2014-01-13 | 2015-07-16 | Electro-Motive Diesel Inc. | Cam follower assembly having swaged bushing |
| JP2019015261A (en) * | 2017-07-10 | 2019-01-31 | 株式会社ジェイテクト | Cam Follower Device |
| JP7303068B2 (en) * | 2019-08-28 | 2023-07-04 | 株式会社オティックス | rocker arm |
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| JPH0674005A (en) * | 1992-08-25 | 1994-03-15 | Koyo Seiko Co Ltd | Cam follower device |
| JPH08170713A (en) * | 1994-12-20 | 1996-07-02 | Tsubakimoto Chain Co | Support structure of roller-like cam follower |
| JPH11247845A (en) * | 1998-02-27 | 1999-09-14 | Nippon Seiko Kk | Bearing device for roller support |
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| JPH0222443U (en) * | 1988-07-29 | 1990-02-14 | ||
| DE10155825A1 (en) * | 2001-11-14 | 2003-05-22 | Ina Schaeffler Kg | Rocker arm used in a valve gear of an internal combustion engine comprises an outer lever having an inner lever positioned between its arms which pivot relative to each other |
| JP2003206707A (en) * | 2002-01-11 | 2003-07-25 | Nsk Ltd | Cam follower device |
| US20050028774A1 (en) * | 2003-08-06 | 2005-02-10 | The Torrington Company | Finger follower |
| JP4830309B2 (en) | 2004-02-20 | 2011-12-07 | 日本精工株式会社 | Rolling and sliding parts |
| JP2006138373A (en) * | 2004-11-11 | 2006-06-01 | Jtekt Corp | Bearing device and assembling method thereof |
| JP2006144848A (en) * | 2004-11-17 | 2006-06-08 | Jtekt Corp | Bearing for rocker arm |
| JP3815504B2 (en) | 2005-07-20 | 2006-08-30 | 日本精工株式会社 | Roller support bearing device |
| JP5023926B2 (en) | 2007-09-27 | 2012-09-12 | 日本精工株式会社 | Cam follower device |
-
2012
- 2012-02-28 JP JP2012040874A patent/JP2013167236A/en active Pending
- 2012-08-28 EP EP12865748.3A patent/EP2806117A1/en not_active Withdrawn
- 2012-08-28 KR KR1020137033861A patent/KR20140015562A/en not_active Application Discontinuation
- 2012-08-28 WO PCT/JP2012/071726 patent/WO2013108433A1/en active Application Filing
- 2012-08-28 CN CN201280032184.9A patent/CN103635663A/en active Pending
- 2012-08-28 US US13/824,718 patent/US20130291817A1/en not_active Abandoned
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0674005A (en) * | 1992-08-25 | 1994-03-15 | Koyo Seiko Co Ltd | Cam follower device |
| JPH08170713A (en) * | 1994-12-20 | 1996-07-02 | Tsubakimoto Chain Co | Support structure of roller-like cam follower |
| JPH11247845A (en) * | 1998-02-27 | 1999-09-14 | Nippon Seiko Kk | Bearing device for roller support |
| US6672266B2 (en) * | 1998-03-12 | 2004-01-06 | Nsk Ltd. | Sheet metal rocker arm, manufacturing method thereof, cam follower with said rocker arm, and assembling method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107923269A (en) * | 2015-06-11 | 2018-04-17 | 伊顿公司 | For the effect force transfering device and its manufacture method being used together with valve mechanism |
| CN106884752A (en) * | 2015-12-03 | 2017-06-23 | 斯凯孚公司 | With the cam driven roller arrangement for strengthening lifter body |
| CN107345491A (en) * | 2016-05-04 | 2017-11-14 | 斯凯孚公司 | Cam driven roller apparatus |
| CN107345491B (en) * | 2016-05-04 | 2021-04-16 | 斯凯孚公司 | Cam follower roller apparatus |
| CN111706415A (en) * | 2019-03-18 | 2020-09-25 | 欧德克斯有限公司 | Support structure for assembled camshaft |
Also Published As
| Publication number | Publication date |
|---|---|
| US20130291817A1 (en) | 2013-11-07 |
| WO2013108433A1 (en) | 2013-07-25 |
| KR20140015562A (en) | 2014-02-06 |
| JP2013167236A (en) | 2013-08-29 |
| EP2806117A1 (en) | 2014-11-26 |
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Application publication date: 20140312 |