CN1966739A

CN1966739A - Quenching apparatus of camshaft

Info

Publication number: CN1966739A
Application number: CNA200510123526XA
Authority: CN
Inventors: 长尾英三
Original assignee: Fuji Electronics Industry Co Ltd
Current assignee: Fuji Electronics Industry Co Ltd
Priority date: 2005-11-17
Filing date: 2005-11-17
Publication date: 2007-05-23

Abstract

The invention provides a quenching device with camshaft. The device can response-quench the WA1 and WA2 catches of WA at the same time to prevent the cervical part of the camshaft from quenching, and prevent catches from concentrate heating. The device comprises heating coil (110) of heating catch WA1, heating coil (120) of heating catch WA2, and driving mechanism (150). The center of heating coil (110) deviates from the center of catch WA1, and the center of heating coil (120) deviates from the center of catch WA2. The center of heating coil (110, 120) winding catch WA1 and WA2 are driven decenteredly. There is also a cooling device and a shielding ring.

Description

Quenching apparatus of camshaft

Technical field

The present invention relates to a kind of the side face that is formed at the cam on the camshaft be carried out induction hardened quenching apparatus of camshaft, more specifically, relate to a kind of each cam periphery, carry out induction hardened quenching apparatus of camshaft simultaneously the camshaft that is formed with the different multiple cam of phase place.

Background technology

The camshaft that uses in engine for automobile has the different multiple cam of phase place usually.And, need on the periphery of each cam, to carry out high-frequency induction hardening.According to Figure 16, the typical case of engine for automobile with camshaft is described.

Camshaft WA shown in Figure 16 has two kinds of different cams of phase place, i.e. 3 cam WA1 and be configured in 2 cam WA2 of the both end sides of this cam WA1.At the both ends of camshaft WA, be provided with collar WAJ.

The center separately of cam WA1 and cam WA2 is overlapped with the center WO of camshaft WA.120 ° of the phasic differences mutually of cam WA1 and cam WA2.In addition, in the following description,, therefore just represent with identical WO because the center of camshaft WA is identical with the center of two cam WA1, WA2.

Cam WA1 is to be outstanding laterally formation of a part on the circumferential direction of circle at center by making with WO.Thereby, becoming outermost end A from WO position farthest, the camshaft center of cam WA1, the position that connects the opposition side on the collinear extended line between the center WO of this outermost end A and cam WA1 becomes opposition side end B.The center of outermost end A and above-mentioned circle, be that table of distances between the camshaft center WO of cam WA1 is shown r1, with the center of opposition side end B and above-mentioned circle, promptly the table of distances between the camshaft center WO of cam WA1 is shown r2.In addition, also identical to cam WA2.

In the high-frequency induction hardening of such camshaft WA, use heating unit with a plurality of heater coils corresponding with each cam.Each heater coil has the circular heater portion that surrounds each cam.The heater portion of a plurality of heater coils is arranged as concentric shape, makes camshaft pass them, under the state of the inboard of each heater portion configuration cam, by making the camshaft rotation, comes simultaneously the periphery of each cam is carried out high-frequency induction heating.

In such quenching apparatus of camshaft, the center WO of camshaft WA and the center of the heater coil center of portion (circular heater) overlap, its result, in the quenching of each cam, as shown in figure 17, each cam WA1, WA2 of camshaft WA, therein under the center O 1 of heart WO and

heater coil

10,20, the state that O2 overlaps, at heater coil 10,20 (strictly speaking, circular heater portion) rotate inboard, thereby the sensed heating of its periphery is quenched by the quick cooling after the induction heating.

But, in the high-frequency induction hardening of such camshaft WA,, therefore, exist with protuberance part in addition and compare the root problem of being crossed dark quenching owing to the protuberance of cam WA1, WA2 is mobile near the internal surface of the

heater coil

10,20 of being everlasting.

Promptly, heater

portion heater coil

10,20, that face the cam side face that carries out induction heating owing to the side face to cam WA1, WA2 forms circle, therefore, gap between the protuberance of cam WA1, WA2 and the heater portion is less than the other parts of cam WA1, WA2 and the gap between the heater portion.Therefore, the quenched case that forms at the protuberance of cam WA1, WA2 produces the uneven problem of depth of hardening than the quenching layer depth that forms in other parts.

In addition, as another problem, when carrying out the cam induction quenching, sometimes induction heating to cam till the collar WAJ that is provided with.Because this collar WAJ is behind the cam induction quenching, carry out the machining operation, therefore, if sensed quenching, will produce can not machining this problem.

Summary of the invention

The present invention In view of the foregoing proposes, and its purpose is, provides a kind of and can solve the quenching apparatus of camshaft of nose of cam being concentrated this problem of heating.

Another object of the present invention is to, provide a kind of and can solve the quenching apparatus of camshaft that prevents in advance this problem of induction quenching of collar.

Another other purpose of the present invention is, a kind of quenching apparatus of camshaft that carries out the configuration operation of camshaft when carrying out hardening step easily is provided.

Another other purpose of the present invention is, a kind of quenching apparatus of camshaft simple in structure is provided.

Quenching apparatus of camshaft involved in the present invention, be to carry out induction hardened quenching apparatus of camshaft simultaneously to the cam side face of the camshaft that is formed with the different multiple cam of phase place, it has: a plurality of heater coils, and it is formed with the heater portion of the circle of the above-mentioned cam side face of heating; Transformer, it supplies with electric current to this heater coil; Driving mechanism, under the state of the misalignment of the center of the heater portion that makes above-mentioned heater coil and above-mentioned camshaft, making above-mentioned heater coil is that the center is by eccentric drive with the cam; Cooling body, it is used to cool off the cam after being heated; Shield ring, it is configured in the face of the collar with above-mentioned cam adjacency, and is used to prevent the sensed quenching of this collar.Above-mentioned heater coil has such structure, and the heater coil that its phase place is identical in series is supplied to electric current from same transformer.

In quenching apparatus of camshaft involved in the present invention, following driving mechanism is equipped with, that is, under the state of the heater portion center of heater coil and camshaft misalignment, make heater coil by eccentric drive.Therefore, even the multiple cam different to phase place, also can be irrelevant with the angle of rotation of camshaft, make distance impartial with distance from opposition side end B to heater portion from outermost end A to heater portion, therefore, can the whole peripheral surface of each cam be quenched with the degree of depth of approximate equality.

Above-mentioned driving mechanism preferably has the structure of the eccentric driving device that is made of offset cam, or has the structure of the eccentric driving device of 2 type of drive.The former can make heater coil by eccentric drive with simple structure.The center that the latter can make the heater portion of heater coil return to relative camshaft is the origin position of concentric, and makes it from this origin position, moves to the quenching position of center that makes heater portion and above-mentioned camshaft misalignment.

When camshaft is carried out induction quenching, make this camshaft pass through axially to go up the interior also configuration (set) of the heater coil of arranging in the quenching position.For to each cam uniform hardening, if heater coil is with respect to the phase place of pairing cam, to different directions off-centre, the configuration operation of the camshaft difficulty that will become during hardening step then, when the offset of heater coil is big, just can not carry out the configuration operation of camshaft.In addition, if the offset of restriction heater coil will hinder each the side face uniform hardening to cam.Yet, if heater coil resets to origin position, can arrange with concentric shape, when hardening step, the configuration operation of camshaft will become very simple.

The quenching device of camshaft involved in the present invention, be can be to the cam side face of the camshaft that is formed with the different multiple cam of phase place, carry out induction hardened quenching apparatus of camshaft simultaneously, it has: a plurality of heater coils, and its heater portion of heating above-mentioned cam side face is for circular; Transformer, it supplies with electric current to this heater coil; Driving mechanism, under the state of the misalignment of the center of the heater portion of above-mentioned heater coil and above-mentioned camshaft, making above-mentioned heater coil is that the center is by eccentric drive with the cam; Cooling body, the cam after its cooling is heated; Shield ring, it is configured in the face of the collar with above-mentioned cam adjacency, and is used to prevent the sensed quenching of this collar; Above-mentioned heater coil constitutes, and the heater coil that phase place is identical is supplied to electric current from same transformer.Therefore, according to this quenching apparatus of camshaft, just can solve this problem of the sensed quenching of collar.

Quenching apparatus of camshaft involved in the present invention also has the shield ring of facing with the collar of the cam adjacency of camshaft, and this shield ring and above-mentioned heater coil are set up in parallel.Because such quenching apparatus of camshaft, shield ring and heater coil are set up in parallel, and the same eccentric movement of doing with heater coil, therefore can prevent the easiest heated part in collar, and promptly cam end portion is overheated.

In addition, in quenching apparatus of camshaft, if the distance between the camshaft center of the outermost end of the middle highest distance position of the above-mentioned cam of distance and cam is made as r1, when the distance between the camshaft center of opposition side end on the collinear extended line that connects between the two and cam is made as r2, the camshaft center that the offset of heater coil is set at cam is the words of the r ≈ (r1-r2)/2 at center, then, also form hardened layer with the other parts same degree degree of depth as the outermost end of the protuberance of cam.

In addition, hide the liquid parts,, can prevent induction quenching so reliably, also can carry out the machining of subsequent handling collar so that can not be sprayed onto collar from the cooling fluid of above-mentioned cooling body if in above-mentioned shield ring, install.

In addition, change, also can adjust the temperature rise of collar by internal diameter and the width dimensions that makes shield ring.

In addition, when can making the heater portion of heater coil, above-mentioned driving mechanism returns to the origin position that is concentric with the camshaft center, and can be from this origin position, when moving to the quenching position of misalignment of the center that makes heater portion and above-mentioned camshaft, just can successfully dispose and take out camshaft.

Description of drawings

Fig. 1 is the summary construction diagram of the quenching apparatus of camshaft of expression the present invention the 1st embodiment.

Fig. 2 is the front elevation of this quenching apparatus of camshaft.

Fig. 3 is the camshaft of expression in this quenching apparatus of camshaft and the drawing in side sectional elevation of the position relation of heater coil.

Fig. 4 is the camshaft of expression in this quenching apparatus of camshaft and the front elevation of the position relation of heater coil.

Fig. 5 is the front elevation of the driving mechanism in this quenching apparatus of camshaft.

Fig. 6 is the front elevation that shows the relation of heater coil in this quenching apparatus of camshaft and cam by the time change list.

Fig. 7 is the front elevation of the quenching apparatus of camshaft of expression the present invention the 2nd embodiment.

Fig. 8 is the orthographic plan of the driving mechanism (eccentric driving device) in this quenching apparatus of camshaft.

Fig. 9 be along the A-A line direction of arrow of Fig. 8 to view.

Figure 10 is the C portion enlarged view of Fig. 9.

Figure 11 be along the B-B line direction of arrow of Fig. 8 to view.

Figure 12 is the summary construction diagram of the quenching apparatus of camshaft of expression the present invention the 3rd embodiment.

Figure 13 is the drawing in side sectional elevation of major portion of the quenching apparatus of camshaft of expression the present invention the 4th embodiment.

Figure 14 is the summary construction diagram of the quenching apparatus of camshaft of expression the present invention the 5th embodiment.

Figure 15 is the camshaft of expression in this quenching apparatus of camshaft and the drawing in side sectional elevation of the position relation of heater coil.

Figure 16 is the accompanying drawing of camshaft, and this figure (A) is the schematic front elevation, and this figure (B) is a summary lateral view.

Figure 17 is the heater coil of expression in the existing quenching apparatus of camshaft and the front elevation of the position relation of camshaft.

Label declaration

100 quenching apparatus of camshaft; 110 heater coils; 120 heater coils;

130 transformers; 140 transformers; 150 driving mechanisms;

160 shield rings; 161 hide the liquid parts; 200 heating units;

210,220 heater coils; 230,240 transformers; 300 eccentric driving devices;

310 brace tables; 320 driver elements; 321 rotating driveshafts;

322 offset cam unit; The 322a bearing spider; 322c the 1st turnbarrel;

332d the 2nd turnbarrel; 323,324 belt wheels; 330 bases;

340 back up pads; 350 web plates; 360 operating mechanisms;

361 leading screws; 362 handles; 363 nut parts

400 drive sources; The WA camshaft; The WA1 cam

The WA2 cam; The WAJ collar

Embodiment

Below, with reference to the accompanying drawings, embodiments of the present invention are described.

Fig. 1 is the summary construction diagram of the quenching apparatus of camshaft of expression the present invention the 1st embodiment, Fig. 2 is the front elevation of this quenching apparatus of camshaft, Fig. 3 is the camshaft of expression in this quenching apparatus of camshaft and the drawing in side sectional elevation of the position relation of heater coil, Fig. 4 is the camshaft of expression in this quenching apparatus of camshaft and the front elevation of the position relation of heater coil, Fig. 5 is the front elevation of the driving mechanism in this quenching apparatus of camshaft, and Fig. 6 is the front elevation that shows the relation of heater coil in this quenching apparatus of camshaft and cam by the time change list.

The related quenching apparatus of camshaft of the 1st embodiment is used at motor car engine shown in Figure 16 induction quenching with camshaft WA.More particularly, above-mentioned quenching apparatus of camshaft uses in the induction quenching in each side face of 3 cam WA1 of this camshaft WA and 2 cam WA2.As previously described, 120 ° of the phasic differences mutually of cam WA1 and cam WA2, cam WA2 is positioned at the both end sides of cam WA1, and then collar WAJ is positioned at its both end sides.In addition, represent with r1 to the distance (cam maximum radius) of the outermost end A of each cam, represent with r2 to the distance (cam minimum radius) of the opposition side end B of each cam from the center WO of camshaft WA from the center WO of camshaft WA.

This quenching apparatus of camshaft 100 has: 3 heater coils 110, and it has the circular heater portion 111 of heating cam WA1 side face; 2 heater coils 120, it has the circular heater portion 121 of heating cam WA2 side face; Transformer 130, it supplies with electric current to heater coil 110; Transformer 140, it supplies with electric current to heater coil 120; Driving mechanism 150, depart from and make under the state that the center WO of center O 2 and cam WA2 of the heater portion 121 of heater coil 120 departs from the center WO of the center O 1 of the heater portion 111 that makes heater coil 110 and cam WA1, make above-mentioned two heater coils 110,120 around the center WO of two cam WA1, WA2 by eccentric drive; Cooling body (diagram is omitted), two cam WA1, WA2 after its cooling heating; Shield ring 160, it is faced, and set collar WAJ is configured at the both ends of camshaft WA, and is used to suppress the sensed quenching of this collar WAJ.

3 heater coils 110 have: circular heater portion 111; The a pair of electric conductor portion 112 that gives, it couples together this heater portion 111 with transformer 130.These 3 heater coils 110 are connected in series on the transformer 130.In addition, 2 heater coils 120 have: circular heater portion 121; The a pair of electric conductor portion 122 that gives, it couples together this heater portion 121 with transformer 140.These 2 heater coils 120 are connected in series on the transformer 140.

Heater coil 110 and heater coil 120 form by bending forming pipe made of copper.In order to prevent the overheated of this heater coil 110 and heater coil 120 self, make water coolant portion's circulation within it.

The basic structure of two heater coils 110,120 is identical substantially, but the cam WA1 of camshaft WA is different with the quenching pattern with the gauge of cam WA2, therefore, must determine the width dimensions of each heater portion 111,121 again to after considering as the quenching pattern of cam WA1, the WA2 of separately heating target etc.

Above-mentioned driving mechanism 150 has: plummer 151, and it carries transformer 130; Plummer 152, it carries transformer 140; Bearing spider 153,154, its be separately positioned on two plummers 151,152 below; Offset cam 155,156, it is connected on this bearing spider 153,154; Turning axle 157,158, it is connected with this offset cam 155,156 respectively; Driving part 159 is given revolving force to this turning axle 157,158.

Herein, center 155A, the 156A of offset cam 155,156 do not overlap with center 157A, the 158A of turning axle 157,158, center 157A, the 158A of turning axle 157,158 only depart from the offset (r1-r2)/2 of two heater coils 110,120 laterally.In addition, because 120 ° of the phasic differences mutually of cam WA2 and cam WA1, therefore, the phase place of the offset cam 155,156 corresponding with two cam WA1, WA2 also differs 120 °.

For example, distance between the center WO of the outer end A of the highest distance position of the center WO of distance cam WA1 and cam WA1 is r1, when the distance between opposition side end B on the collinear extended line that connects between the two and the center WO of cam WA1 is r2, just is set to the offset r ≈ (r1-r2)/2 of heater coil 110 with the offset (r1-r2)/2 of the offset cam 155 of cam WA1 respective side and equates.And offset r does not does not preferably increase and decrease, but when actual sensed is quenched, can have some increases and decreases.

That is, as hereinafter described because the center WO of camshaft WA is fixed, thus heater coil 110 to carry out center WO with camshaft WA be that the off-centre at center rotatablely moves.

On the other hand, the relation of heater coil 120 and camshaft WA, just its phase phasic difference is 120 °, and is therefore identical with the relation of camshaft WA with heater coil 110.

Above-mentioned driving part 159 has with the lower section and constitutes: drive-motor (diagram is omitted), its drive cam shaft WA rotation; A pair of timing transmission belt 159A, 159B, its power with this drive-motor passes to above-mentioned turning axle 157,158.Therefore, camshaft WA and two transformers 130,140 are driven synchronously.

In addition, as mentioned above, this driving part 159 makes camshaft WA with this center WO, and promptly the center WO with two cam WA1, WA2 is the center, by eccentric drive.

And, diagram not, as the cooling jacket of the cooling body of two cam WA1 after being heated, WA2 shower cooling liquid, be configured in two heater coils 110,120 near.After cam WA1, WA2 are heated, make camshaft WA skew, and utilize cooling jacket to cool off.At this moment, cooling fluid is supplied with the feed path of cooling jacket and should be arranged to can not produce the action of each several part interfere, this point is extremely important.

On the other hand, with respect to the collar WAJ that is arranged on the camshaft WA, be provided with the predetermined distance and of being separated by with it in the face of its roughly in the form of a ring shield ring 160.

By the quenching apparatus of camshaft 100 of such formation, the induction quenching of camshaft WA is following to carry out.

With the cam WA1 that makes camshaft WA respectively be positioned at the heater portion 111 of heater coil 110 the inboard, make cam WA2 be positioned at the mode of inboard of the heater portion 121 of heater coil 120, camshaft WA is arranged on the above-mentioned driving mechanism 150.So shield ring 160 is just in the face of above-mentioned collar WAJ.

When offset is (r1-r2)/2, supply with electric current from two transformers 130,140 to two heater coils 110,120 respectively.In addition, drive the drive-motor of driving part 159 simultaneously, making camshaft WA is the center rotation with the center WO of the camshaft WA of self.The motivating force of above-mentioned drive-motor passes to turning axle 157,158 respectively by timing transmission belt 159A, 159B.Therefore, plummer 151 and plummer 152 move as shown in Figure 6.That is two plummers 151,152 are under the state of 120 ° of phase phasic differences, and the off-centre of carrying out offset r ≈ (r1-r2)/2 rotatablely moves.

Because two heater coils 110,120 are installed on the transformer 130,140 that is carried on the plummer 151,152, therefore carry out same off-centre and rotatablely move.For example, the heater coil 110 of heating cam WA1 with the camshaft center WO of camshaft WA, promptly the camshaft center WO with cam WA1 is the motorium, carries out the eccentric drive that radius is r ≈ (r1-r2)/2.

Specifically, the motion carried out as shown in Figure 6 of heater coil 110.Shown in Fig. 6 (A), when the outermost end A of cam WA1 was positioned at 180 ° position, the center WO of cam WA1 only departed from (r1-r2)/2 from the center O 1 of the heater portion 111 of heater coil 110 along 0 ° of direction.

As camshaft WA in the counterclockwise direction during half-twist, promptly shown in Fig. 6 (B), when the outermost end A of cam WA1 was in 270 ° position, the center WO of cam WA1 only departed from (r1-r2)/2 from the center O 1 of the heater portion 111 of heater coil 110 along 90 ° of directions.

In addition, as camshaft WA in the counterclockwise direction again during half-twist, promptly shown in Fig. 6 (C), when the outermost end A of cam WA1 is in 0 ° position, the center WO of cam WA1 only departs from (r1-r2)/2 from the center O 1 of the heater portion 111 of heater coil 110 along 180 ° directions.

And then, as camshaft WA in the counterclockwise direction again during half-twist, promptly shown in Fig. 6 (D), when the outermost end A of cam WA1 is in 90 ° position, the center WO of cam WA1 only departs from (r1-r2)/2 from the center O 1 of the heater portion 111 of heater coil 110 along 270 ° directions.

That is, heater coil 110 is that the eccentric drive of offset for (r1-r2)/2 carried out at the center with the center WO of cam WA1.

Because heater coil 110 carries out such off-centre and rotatablely moves, so distance between the heater portion 111 of the outermost end A of cam WA1 and heater coil 110, always be held in and opposition side end B and heater portion 111 between distance about equally, described opposition side end B is connecting on the center WO and the collinear extended line between the outermost end A of above-mentioned camshaft WA.Therefore, can guarantee the side face of cam WA1 is carried out even heating.

In addition because the situation of cam WA2 is also identical with cam WA1, therefore, the distance between the heater portion 121 of the outermost end A of cam WA2 and heater coil 120, remain and opposition side end B and heater portion 121 between distance about equally.Therefore, can guarantee the side face of cam WA2 is carried out even heating.

When to these two cam WA1, WA2 heating, owing to make shield ring 160, therefore,, make the faradic intensity (level) that in collar WAJ, produces diminish by shield ring 160 in the face of collar WAJ, can reach quenching temperature hardly.

If carried out predetermined heating,, two cam WA1, WA2 are implemented induction quenching then from cooling jacket shower cooling liquid.At this moment, hide liquid parts 161 owing to be provided with on the shield ring of facing with collar WAJ 160, therefore, cooling fluid can not be ejected on the collar WAJ.Thereby, even the part of collar WAJ has reached quenching temperature, can not be cooled liquid cooling but yet, therefore, consequently, can prevent the induction quenching of collar WAJ reliably.

Fig. 7 is the front elevation of the quenching apparatus of camshaft of expression the 2nd embodiment of the present invention, Fig. 8 is the orthographic plan of the driving mechanism (eccentric driving device) in this quenching apparatus of camshaft, Fig. 9 is the sectional view along the A-A line direction of arrow of Fig. 8, Figure 10 is the C portion enlarged view of Fig. 9, and Figure 11 is the sectional view along the B-B line direction of arrow of Fig. 8.

As shown in Figure 7, the related quenching apparatus of camshaft 100 of the related quenching apparatus of camshaft of the 2nd embodiment and the 1st embodiment is the same, uses when each side face to the phase place of camshaft WA different a plurality of cam WA1, WA2 quenches simultaneously.This quenching device has: a plurality of heating units 200,200, and it is provided with corresponding to the phase place of camshaft WA different a plurality of cam WA1, WA2; Eccentric driving device 300,300, eccentric drive heating unit 200,200 respectively.

A plurality of heating units 200,200 in fact with the related quenching apparatus of camshaft 100 of the 1st embodiment in employed the same, separate configuration is in the both sides of the quenching position of camshaft WA.Heating unit 200,200 is by constituting with the lower section: heater coil 210,220, and it has the circular heater portion 211,221 that surrounds cam WA1, WA2 on the camshaft WA; Transformer 230,240, it is powered to heater coil 210,220.Heater portion 211,221 has the power supply conductor portion 212,222 that is used to connect transformer 230,240.

A plurality of eccentric driving devices 300,300 are mechanically connected on the common drive source 400, and by the synchronized drive of being undertaken by this common drive source 400, a plurality of heating units 200,200 are by synchronous eccentric drive.And the driving mechanism 150 of the quenching apparatus of camshaft 100 that a plurality of eccentric driving devices 300,300 and drive source 400 and the 1st embodiment are related is corresponding, and drive source 400 is corresponding with driving part 159 in the driving mechanism 150.

As Fig. 8 and shown in Figure 9, each eccentric driving device 300 has: brace table 310,310, and it supports the transformer 230,240 of heating unit 200; The a pair of driver element 320,320 in both sides, it drives each brace table 310.Brace table 310 can be along moving with rectangular 2 directions of the medullary ray of camshaft WA, and be fixed on this centerline direction.Driver element 320,320 is installed on the common base 330.

Each driver element 320 has: the rotating driveshaft 321 of level; Offset cam unit 322,322, it is installed on 2 axial positions of rotating driveshaft 321.Rotating driveshaft 321 is parallel with the medullary ray of camshaft WA, and by bearing 325,325, supporting freely by a pair of back up pad 340,340 rotations in front and back that are installed on the base 330, and on prescribed position, be driven in rotation by common drive source 400.

In order to be connected, in side's driver element 320, the 1st belt wheel 323 is installed in an end of rotating driveshaft 321 with drive source 400.In addition, for each rotating driveshaft 321,321 of energy synchronized drive between two driver elements 320,320, each end at each rotating driveshaft 321,321 is equipped with the 2nd belt wheel 324.In addition, connection brings by the timing transmission and carries out.

Symmetry before and after offset cam unit 322,322 constitutes.As shown in figure 10, the offset cam unit 322 of rear side (an opposite side with belt wheel) is by constituting with the lower section: blocky bearing spider 322a; The 1st turnbarrel 322c, it is via bearing 322b, and rotation freely is entrenched in the inboard of bearing spider 322a; The 2nd turnbarrel 322d, its be entrenched in the 1st turnbarrel 322c more in the inner part.

Below brace table 310, bearing spider 322a is installed into, and can move along the centerline direction (centerline direction of camshaft WA) of rotating driveshaft 321 with non-rotary state.The 1st turnbarrel 322c can move along the centerline direction (centerline direction of camshaft WA) of rotating driveshaft 321 with bearing spider 322a, inner circumferential surface 322c ' passes through total length and has same internal diameter, and tilts to a direction with predetermined angular with respect to the medullary ray of rotating driveshaft 321.

On the other hand, the 2nd turnbarrel 322d is fastened to the periphery of rotating driveshaft 321, its periphery 322d ' passes through total length and has same external diameter, and, tilt to a direction with predetermined angular with respect to the medullary ray of rotating driveshaft 321 corresponding to the inner peripheral surface 322c ' of the 1st turnbarrel 322c.

In addition, the 2nd turnbarrel 322d is with rotating driveshaft 321 rotations, and be fixed on the centerline direction (centerline direction of camshaft WA) of rotating driveshaft 321, relative therewith, the 1st turnbarrel 322c can be along moving axially with respect to the 2nd turnbarrel 322d.That is, the 1st turnbarrel 322c and the 2nd turnbarrel 322d with the side face 322c ', the 322d ' that tilt as slipping plane, can be along axially relatively moving, herein, the 1st turnbarrel 322c in the outside moves.And, move by this, the inner peripheral surface of the 1st turnbarrel 322c moves with respect to the periphery of the 2nd turnbarrel 322d is parallel, by making the 1st turnbarrel 322c with respect to the 2nd turnbarrel 322d off-centre, bearing spider 322a is with respect to rotating driveshaft 321, to comprise any offset off-centre of 0.

The offset cam unit 322 of front side (belt wheel side), the side face of facing mutually in the side face of facing mutually except its

turnbarrel

322c, 322d and the offset cam unit 322 of rear side (with the belt wheel opposition side) tilts before and after being this point symmetrically, and other is identical.

The offset cam unit 322,322 of both sides correspondence will couple together between its bearing spider 322a by web plate 350.Front and back web plate 350,350 is driven approaching or separation by the operating mechanism 360 between the driver element 320,320 that is arranged on both sides.

That is, as shown in figure 11, operating mechanism 360 has: leading screw 361, and its rotating driveshaft 321,321 with both sides is parallel; Handle 362 is installed in an end of leading screw 361; The a pair of nut portions 363,363 in front and back is on the web plate 350,350 before and after it is installed in.Leading screw 361 axially on 2 positions on, be provided with external thread part 361a, 361a.External thread part 361a, 361a press reverse direction and form, and screw respectively on a pair of nut portions 363,363 in front and back.

Thereby, by leading screw 361 is rotated operation to a direction, web plate 350,350 symmetrically near or separate, by leading screw 361 is operated to opposite direction, web plate 350,350 symmetry round about is mobile.Move by this symmetry, in the driver element 320,320 of both sides, bearing spider 322a, the 322a of the offset cam unit 322,322 of front and back is with each inboard the

1st turnbarrel

322c, 322c, centerline direction symmetry along rotating driveshaft 321,321 moves, offset to the offset cam unit 322,322 of front and back comprises 0 identical adjusting.

Secondly, for the related quenching apparatus of camshaft of the 2nd embodiment, particularly the function of eccentric driving device 300,300 describes.

Before quenching, offset is adjusted to 0 with eccentric driving device 300,300.Specifically, by operating with 300 pairs of operating mechanisms 360 of each eccentric driving device, driver element 320,320 with both sides, offset cam unit 322,322 before and after the operation makes the center of the 1st turnbarrel 322c overlap with the center of the 2nd turnbarrel 322d with the offset cam unit 322,322 of front and back symmetrically.Thus, bearing spider 322a becomes concentric with rotating driveshaft 321.Its result, in heating unit 200,200, heater coil 210,220 is arranged as concentric shape.

At this moment, eccentric driving device 300,300 both can be a driving condition, also can be non-driven state.Under driving condition, rotating driveshaft 321 rotations, but because the offset of bearing spider 322a is 0, so brace table 310 does not move.

In heating unit 200,200, when heater coil 210,220 is arranged in concentric shape, make camshaft WA by in the heater coil 210,220, be configured in the quenching position.Thus, a plurality of cam WA1, the WA2 that the phase place of camshaft WA is different is positioned at the inboard of heater coil 210,220, and the middle WO of cam WA1, WA2 overlaps with center O 1, the O2 of heater coil 210,220.

After configuring camshaft WA, offset is adjusted to prescribed value with eccentric driving device 300,300.Specifically, by operating with 300 pairs of operating mechanisms 360 of each eccentric driving device, with the offset cam unit 322,322 of the driver element 320,320 of both sides before and after operating symmetrically, make the 1st turnbarrel 322c with respect to the 2nd turnbarrel 322d off-centre with the offset cam unit 322,322 of front and back.

Thus, in heating unit 200,200, heater coil 210,220 is with respect to the center WO of corresponding cam WA1, WA2, to protruding lateral deviation heart specified amount.If establishing the maximum radius of cam WA1, WA2 is r1, minimum radius is r2, and then about (r1-r2)/2nd of offset is proper.

After finishing eccentric operation, synchronous with this rotation when camshaft WA edge is rotated in a circumferential direction, make drive source 400 work, drive eccentric driving device 300,300.

Thus, in each eccentric driving device 300, make rotating driveshaft 321,321 rotations with the driver element 320,320 of both sides.In the offset cam unit 322,322 of driver element 320, the 1st turnbarrel 322c carries out off-centre and rotatablely moves, but since the not rotation of bearing spider 322a in the outside therefore only carry out off-centre and rotatablely move.This off-centre rotatablely moves via brace table 310, is delivered on the transformer 230,240 of heating unit 200.

Its result, in heating unit 200,200, Yi Bian heater coil 210,220 is kept the offset of regulation, Yi Bian synchronous with the rotation of cam WA1, WA2, around the center of cam WA1, WA2 WO by eccentric drive.

Under this state, by to heater coil 210,220 energising, the side face of cam WA1, WA2 upwards roughly was heated equably in week, after heating, by quick cooling, in the whole quenching of carrying out equalization on circumferentially of side face.

After quenching is finished, make offset return to 0 with eccentric driving device 300,300.In heating unit 200,200,, the camshaft WA after the quenching is successfully extracted out from the inboard of heater coil 210,220 by heater coil 210,220 is arranged as concentric shape.

Like this, in the related quenching apparatus of camshaft of the 2nd embodiment, eccentric driving device 300,300 is by the simple structure in common drive source 400, and by bearing spider 322a simply directly advance operation, just can regulate offset arbitrarily.And, quench in the time of the periphery of cam WA1, WA2 by being applied to camshaft WA, equipment cost is suppressed to very low in, can successfully dispose and take out camshaft WA.

Figure 12 is the summary construction diagram of the quenching apparatus of camshaft of expression the 3rd embodiment of the present invention.

In above-mentioned the 1st embodiment and the 2nd embodiment, power by drive-motor, camshaft WA is rotatablely moved, and carry out the eccentric drive of two heater coils 110,120, as shown in figure 12, not to utilize drive-motor, but, can carry out eccentric drive yet by utilizing 4

independent servo motor

559A, 559B, 559C, 559D.

Promptly, in the related quenching apparatus of camshaft 500 of the 3rd embodiment, respectively the guide plate 551A of left and right directions is arranged on the bottom surface of the plummer 551 that carries transformer 530, the guide plate 551B of above-below direction is arranged on the side of transformer 530, and be provided with 2 servomotor 559A, 559B, feed screw 559a, the 559b corresponding respectively with

guide plate

551A, 551B are installed on 2 servomotor 559A, 559B.That is, move along 2 mutually orthogonal directions, just can carry out the off-centre identical and rotatablely move with above-mentioned quenching apparatus of camshaft 100 by making plummer 551.

In the case, heater coil 520 also will be provided with driving mechanism certainly, and this driving mechanism uses: identical 2

servomotor

559C, 559D;

Feed screw

559c, 559d by this

servomotor

559C, 559D driving; Guide plate 552A, the 552B etc. corresponding with this

feed screw

559c, 559d.

Like this, utilize the driving part 550 of

servomotor

559A, 559B, 559C, 559D, as long as the control signal of the driving of

servomotor

559A, 559B, 559C, 559D is controlled in change, just can change the movement locus of two heater coils 510,520 with comparalive ease.Promptly, if utilize above-mentioned offset cam 155,156 or mechanical parts such as timing transmission belt 159A, 159B, when change takes place the track of eccentric movement because camshaft changes, need to change offset cam 155,156 etc., so when carrying out this change, need the regular hour.But,,, therefore have the effect of easy change owing to do not need so much time if only change control signal.

And, in above-mentioned 3 embodiments,, can list camshaft as shown in figure 16 as camshaft, the present invention is not limited in this camshaft WA certainly.

Figure 13 is the drawing in side sectional elevation of major portion of the quenching apparatus of camshaft of expression the 4th embodiment of the present invention.In above-mentioned the 1st embodiment, to heater coil 110,120 and shield ring 160 and to hide liquid parts 161 all be that situation about being provided with separately is illustrated, as shown in figure 13, also can on the side plate 123 of heater coil 120, be set up in parallel shield ring 160 and hide liquid parts 161.Extend the arm 123A that constitutes by insulant from the side plate 123 that constitutes heater coil 120, water-cooled shield ring 160 is installed at the front end of this arm 123A.

Like this,, rotatablely move shield ring 160 and hide liquid parts 161 and carry out off-centre and rotatablely move with the off-centre of heater coil 120 if shield ring 160 is installed and is hidden liquid parts 161 on heater coil 120.So, can prevent in collar WAJ the easiest heated part, be opposition side end B overheated of cam WA2.

In the 1st embodiment, illustrated, when being made as r1 apart from the distance between the camshaft center WO of the outermost end A of the highest distance position of the camshaft center WO of each cam WA1, WA2 and cam WA1, WA2, when establishing r2, it is the r ≈ (r1-r2)/2 at center that the offset r of each heater coil 110,120 is set at the camshaft center WO of cam WA1, WA2 the distance between the camshaft center WO of the opposition side end B on the collinear extended line that connects between the two and cam WA1, WA2.But, also can be set at any number between 0 ~ (r1-r2)/2 to offset r according to the specification of cam face and quenching.

If when establishing offset r and being 1.5 ~ 3.0mm, when the heater portion 111,121 that makes camshaft WA by each heater coil 110,120 inboard, the effect that just has each cam WA1, WA2 not do not passed through smoothly by any obstruction ground.

Figure 14 is the summary construction diagram of the quenching apparatus of camshaft of expression the 5th embodiment of the present invention, and Figure 15 is the drawing in side sectional elevation of the major portion of this quenching apparatus of camshaft.

In the above-described embodiment, having represented the quenching example corresponding to the camshaft WA of single cylinder (bore), but as shown in figure 15, also can be the camshaft WB of correspondence 3 cylinders that for example use in so-called V6 engine.In the case, because each cam forms 3 phases that differ 120 °, therefore use 3 transformer 130A, 130B, 130C.That is, the suction side cam of the 1st cylinder and the exhaust side cams of the 2nd cylinder have same phase, and the suction side cam of the exhaust side cams of the 1st cylinder and the 3rd cylinder has same phase, and the suction side cam of the 2nd cylinder and the exhaust side cams of the 3rd cylinder have same phase.

Thereby as shown in figure 14, the 1st transformer 130A will supply with electric currents with 2 the 2nd suction side of the exhaust side cams of heater coil 110B1 and induction heating the 2nd cylinder with heater coil 120B2 to 3 the 1st suction side of the suction side cam of induction heating the 1st cylinder.And each heater coil 110B1,120B2 of amounting to 5 are connected in series, and the magnitude of current separately equates.

In addition, the 2nd transformer 130B will supply with electric currents with 3 the 3rd suction side of the suction side cam of heater coil 120B1 and induction heating the 3rd cylinder with heater coil 110B3 to 2 the 1st exhaust sides of the exhaust side cams of induction heating the 1st cylinder.And each heater coil 120B1,110B3 of amounting to 5 are connected in series, and the magnitude of current separately equates.

In addition, the 3rd transformer 130C will supply with electric currents with 2 the 3rd exhaust sides of the exhaust side cams of heater coil 110B2 and induction heating the 3rd cylinder with heater coil 120B3 to 3 the 2nd suction side of the suction side cam of induction heating the 2nd cylinder.And each heater coil 110B2,120B3 of amounting to 5 are connected in series, and the magnitude of current separately equates.

In addition, as shown in figure 15, be set side by side with shield ring 160B1, the 2nd exhaust side shield ring 160B2 on the heater coil 120B2 on the 1st exhaust side usefulness heater coil 120B1, the shield ring 160B3 on the 3rd exhaust side usefulness heater coil 120B3 respectively.

Claims

1. quenching apparatus of camshaft, it can carry out induction quenching simultaneously to each cam side face of the camshaft that is formed with the different multiple cam of phase place, it is characterized in that,

Have:

A plurality of heater coils, it is formed with the circular heater portion of the above-mentioned cam side face of heating;

Transformer is supplied with electric current to this heater coil;

Driving mechanism, under the state of the misalignment of the center of the heater portion that makes above-mentioned heater coil and above-mentioned camshaft, it makes above-mentioned heater coil is that the center is by eccentric drive with the cam;

Cooling body, the cam after its cooling is heated;

Shield ring, it is configured in the face of the collar with above-mentioned cam adjacency, and suppresses the sensed quenching of this collar;

Supply with electric current from same transformer to above-mentioned heater coil with same phase.

2. quenching apparatus of camshaft as claimed in claim 1 is characterized in that,

If the distance between the center of the outermost end of the above-mentioned camshaft of distance center highest distance position and camshaft is made as r1, distance between the center of opposition side end on the collinear extended line that connects between the two and camshaft is made as r2, and then to be set to the camshaft center be 0～r ≈ (r1-r2)/2 at center to the offset of heater coil.

3. quenching apparatus of camshaft as claimed in claim 1 is characterized in that,

Above-mentioned shield ring and above-mentioned heater coil are set up in parallel.

4. quenching apparatus of camshaft as claimed in claim 1 is characterized in that,

Described shield ring is equipped with and hides the liquid parts, so that can not be sprayed onto collar from the cooling fluid of above-mentioned cooling body.

5. quenching apparatus of camshaft as claimed in claim 1 is characterized in that,

It has by internal diameter that makes described shield ring and width dimensions variation, can adjust the structure that collar heats up.

6. quenching apparatus of camshaft as claimed in claim 1 is characterized in that,

Above-mentioned driving mechanism constitutes, and has the eccentric driving device based on offset cam or 2 drive-types.