DE112017002555T5 - Phase change unit and valve control change device - Google Patents

Abstract

The phase change unit has a first face gear (20) that rotates integrally with either one of a first rotating solid and a second rotating body, an elastically deformable thin plate-shaped second face gear (40) integral with the other of the first rotating body and the second rotating body Solid rotating and having a different number of teeth from that of the first face gear, and a rotation adjusting member (50) whose rotation about the axis line (S) is adjusted by external force to elastically deform the second face gear to form a part of a row of teeth (43) to cause to intervene with the first face gear, and to cause the engagement surface of the second face gear to move. This makes it possible, inter alia, to simplify the structure, to reduce the number of components, to reduce the size of the device and to facilitate the changeover for the phase.

Description

[Technical area]

The present invention relates to a phase change unit for changing a rotational phase of two rotating bodies, and more particularly to a phase change unit applied when an opening / closing control (valve timing) of an intake valve or an exhaust valve of an internal combustion engine is changed, and a valve timing change apparatus using the same.

[State of the art]

As conventional valve timing changing devices, there is known one which includes a pinion and an internal gear rotating about a central axis of a cam shaft, an eccentric shaft eccentric with respect to the central axis, a planetary gear rotatably supported around the eccentric shaft, and in FIG the internal gear engages, an output shaft that is connected to the camshaft and meshes with the planetary gear to be rotated integrally with the camshaft in accordance with the rotation of the planetary gear, a working shaft connected to the eccentric shaft, and an electromagnetic portion , which applies a torque to the working shaft, etc. (See, for example, Patent Literature 1.)

In the valve timing changing apparatus, an internal gear planetary gear mechanism, which is a cyclo reduction mechanism, is used as a phase change unit for changing a relative rotational phase between the pinion and the camshaft.

However, with such an internal gear planetary gear mechanism, since the planetary gear is disposed radially inward of the internal gear, there is a limit to downsizing in a radial direction or the like, and it is difficult to meet both a large reduction ratio and a reduction requirement.

[Patent Literature]

[Patent Literature 1]
Japanese Patent No. 3937164

[Brief Description of the Invention]

[Technical problem]

The present invention has been made in view of the above circumstances, and an object of the present invention is to solve the above-described problems or the like, and to provide a phase change unit and a valve timing change apparatus using the same capable of easily rotating a rotating body of two rotating bodies by using an external force such as a low output electric motor.

[The solution of the problem]

A phase change unit of the present invention is a phase change unit that changes a relative rotational phase between a first rotating body and a second rotating body rotating about a predetermined axis, and the phase change unit has a first face gear integral with one of the first rotating body and the second rotating body rotates, a second elastically deformable thin plate-shaped face gear which rotates integrally with the other of the first rotating body and the second rotating body and has the number of teeth different from the number of teeth of the first face gear, and a rotation adjusting member is rotationally adjusted about the axis of an external force such that the second planer teeth is elastically deformed to engage in a portion of a row of teeth this with that of the first planer teeth, and an engagement portion of the second Planve Serration is moved.

In the phase change unit having the above-described configuration, a configuration in which one of the rows of teeth of the first face gear and the teeth of the gear of the second face gear are formed in a conical shape about the axis can be employed.

In the phase change unit having the above-described configuration, a configuration in which the rotation adjustment member has a plurality of pressing portions that press and elastically deform the second face gear at a plurality of portions may be employed.

In the phase change unit having the above-described configuration, a configuration in which the pressing portions have a rolling element that rolls while in contact with the second face gear can be employed.

In the phase change unit having the above-described configuration, a configuration in which the first rotating body has a rotor disposed in a housing, in which the first face gear, the second Planetary gear and the Rotationsseinstellelement are received, the first face gear is connected to the rotor disposed in a housing to be rotated integrally therewith, the second face gear is connected to the second rotating body to be rotated integrally therewith, and the Rotationsseinstellelement rotatable is supported relative to the rotor disposed in a housing.

In the phase change unit having the above-described configuration, a configuration in which the second face gear is connected to the second rotating body via a spacer member and the spacer member has a bearing portion rotatably supporting the rotor disposed in a housing can be employed ,

In the phase change unit having the above-described configuration, a configuration in which the spacer member has a restricting portion restricting a relative rotational range between the first rotating body and the second rotating body, and the rotor disposed in a housing may have a restricted portion has, with which the restricting portion comes into contact, are used.

In the phase change unit having the above-described configuration, a configuration in which the rotor disposed in a housing has a first rotor arranged in a housing in which the first face gear is disposed, and a second rotor arranged in a housing, which is arranged is connected to the first arranged in a housing rotor, and the second disposed in a housing rotor having a bearing portion which supports the Drehseinstellelement about the axis, are used.

Further, in the phase change unit having the above-described configuration, a configuration in which the first rotating body has a rotor disposed in a housing in which the first face gear, the second face gear and the rotation adjustment member are housed may be the first face gear second rotor disposed in a housing to be integrally rotated therewith, the second face gear is connected to the first rotating body so as to be integrally rotated therewith, and the rotation adjusting member is rotatably supported relative to the rotor disposed in a housing , are used.

In the phase change unit having the above-described configuration, a configuration in which the first face gear has a bearing portion rotatably supporting the rotor disposed in a housing can be employed.

In the phase change unit having the above-described configuration, a configuration in which the second face gear has a hook portion on its outer edge portion, and wherein the rotor disposed in a housing has a recessed holding portion hooking the hook piece on a peripheral wall thereof, be used.

In the phase change unit having the above-described configuration, a configuration in which the rotor disposed in a housing has a first rotor arranged in a housing, which is connected to the second face gear to rotate integrally therewith, and a second in a rotor arranged in a housing, which is connected to the first rotor arranged in a housing, which has a bearing portion, which supports the Drehseinstellelement rotatably supported about the axis, are used.

A valve timing change apparatus of the present invention has a phase change unit that changes a relative rotational phase between a rotor disposed in a housing forming a first rotating body and a cam shaft constituting a second rotating body, and the valve timing changing device changes an opening / closing operation. Closing time of an intake valve or an exhaust valve, which is driven by the camshaft, wherein any of the phase change units having the above-described configuration is used as the phase change unit.

[Advantageous Effects of the Invention]

According to the phase change unit having the above-described configuration, a phase can be changed easily while simplifying the structure, reducing the number of parts, downsizing the device, or the like. For example, when the phase change unit is used as a reduction gear, a reduction ratio can be increased. It is therefore possible to easily change a rotational phase of two rotating bodies by using an external force such as a low-output electric motor. For example, when the present invention is applied to a valve timing change apparatus of the engine, it is possible to readily change the valve timing while reducing and thinning the apparatus or the like is achieved.

list of figures

• 1 Fig. 12 is an external perspective view illustrating a valve timing change apparatus using an embodiment of a phase change unit according to the present invention.
• 2 FIG. 11 is an external perspective view of the valve timing changing device shown in FIG 1 is illustrated in which an electric motor and a camshaft have been omitted.
• 3 FIG. 13 is an exploded perspective view of the valve timing changing device shown in FIG 2 is illustrated.
• 4 FIG. 12 is a cross-sectional view of the valve timing changing device shown in FIG 2 is illustrated.
• 5 FIG. 12 is an exploded perspective view illustrating a first face gear and a second face gear constituting the phase change unit included in the device incorporated in FIGS 1 to 4 is illustrated, illustrated.
• 6 FIG. 13 is an exploded perspective view of the phase change unit incorporated in FIG 5 is illustrated, viewed obliquely from behind.
• 7 FIG. 15 is a perspective view showing a relationship between a first face gear, a second face gear, and a pressing portion (rolling member) of a rotation adjusting member included in the phase change unit shown in FIG 2 is illustrated, included.
• 8th FIG. 16 is a side view showing a relationship between the first face gear, the second face gear and the pressing portion (rolling member) of the rotation adjusting member included in the phase change unit incorporated in FIG 2 is illustrated.
• 9 FIG. 16 is a side view showing a relationship between the first face gear, the second face gear and the pressing portion (rolling member) of the rotation adjusting member included in the phase change unit shown in FIG 2 is illustrated, included.
• 10 FIG. 13 is an exploded perspective view illustrating a valve timing changeover apparatus employing another embodiment of a phase change unit according to the present invention. FIG.
• 11 FIG. 12 is a cross-sectional view of the valve timing changing device shown in FIG 10 is illustrated.
• 12 FIG. 4 is an exploded perspective view illustrating a first face spline and a second face spline constituting the phase change unit included in the device shown in FIGS 10 and 11 is illustrated, illustrated.
• 13 FIG. 13 is an exploded perspective view of the phase change unit incorporated in FIG 12 is illustrated, viewed obliquely from behind.

[Description of Embodiments]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As in 1 1, a valve timing change apparatus according to this embodiment includes a phase change unit U as an embodiment having a relative rotational phase between a camshaft CS and a pinion 11a replaced.

Here is the pinion 11a a portion of a first rotating body that is in a direction about an axis S (CR direction in 1 ) is rotated and connected to rotation of a crankshaft via a chain.

The camshaft CS forms a second rotating body, which is in a direction about the axis S (CR direction in 1 ) rotates.

When the phase change unit U is properly driven and controlled by an electric motor DM, an opening / closing control (valve control) of an intake valve or an exhaust valve is provided by the camshaft CS powered, configured to be changed.

As in the 1 to 9 illustrates, the phase change unit U a rotor disposed in a housing 10 as the first rotating body, a first planer toothing 20 integral with the rotor disposed in a housing 10 rotates, a spacer element 30 that with the camshaft CS as the second rotating body is connected, a second planer toothing 40 integral with the camshaft CS over the spacer element 30 rotates, and a rotation adjustment 50 on.

The arranged in a housing rotor 10 has a first rotor disposed in a housing 11 on, rotatable about the axis S supported is, and a second arranged in a housing rotor 12 with the first rotor arranged in a housing 11 using bolts b1 connected is.

As in the 3 to 5 illustrates, the first disposed in a housing rotor 11 a pinion 11a an annular inner peripheral portion 11b into which a storage section 32 of the spacer element 30 fitted, a fixing section 11c , which has a rear surface of the first planer toothing 20 attached, a restricted section 11d , a cylindrical section 11e and a plurality of bolt holes 11f into which the bolts b1 on an outer circumference of the cylindrical portion 11e are screwed on.

The inner circumferential section 11b is formed to have an inner diameter dimension into which the bearing portion 32 of the spacer element 30 slidably fitted.

The attachment section 11c is formed to a fastening portion 23 the first planer toothing 20 to fix. What the attachment section 11c concerns, when the attachment section 23 has a concave portion, for example, the attachment portion 11c may be formed as a convex portion to be fitted in the concave portion, or may have a screw structure or the like.

The restricted section 11d is formed as a stepped portion in which an inner wall in a fan shape is hollowed out so that the restricted portion 11d with a restriction section 36 of the spacer element 30 in a detachable manner in a direction of rotation about the axis S comes into contact.

As in 4 illustrates, the second disposed in a housing rotor 12 an annular section 12a on top of that with the cylindrical section 11e of the first rotor arranged in a housing 11 is joined together, an annular inner peripheral portion 12b that with a warehouse RB equipped, an opening 12c including an end portion of the rotation adjustment member 50 exposed, and a plurality of circular holes 12d through which bolts b1 pass.

The opening 12c is formed in a circular shape around a connecting portion 54 of the rotation adjustment element 50 expose.

The inner circumferential section 12b works as a bearing section that rotates the rotation adjustment element 50 around the axis S over the camp RB supported.

In a state where the first rotor disposed in a housing 11 rotatable about the axis S the camshaft CS over the spacer element 30 is supported and the first planer teeth 20 , the second planer toothing 40 , the rotation adjustment element 50 and the like when the second rotor disposed in a housing 12 with the first rotor arranged in a housing 11 is connected, which is arranged in a housing rotor 10 as the first rotating body, around the axis S rotated, formed.

As arranged in a housing rotor 10 the first rotor arranged in a housing 11 and the second rotor disposed in a housing 12 As described above, the phase change unit U can be easily assembled by the second rotor disposed in a housing 12 with the first rotor arranged in a housing 11 with the first spline 20 , the second planer toothing 40 , the rotation adjustment element 50 and the like incorporated therein.

The first planer toothing 20 has an annular flat plate portion 21 , a row of teeth 22 resting on the annular flat plate section 21 is formed, and the attachment portion 23 on.

The row of teeth 22 consists of the number of teeth Z1 and is formed in a ring-shaped arrangement on a surface facing F in an S-axis direction.

Here is how in 9 illustrates the row of teeth 22 in a conical shape around the axis S having a predetermined inclination angle θ with respect to the axis S is formed, formed. The first planer toothing 20 is therefore formed to have a serrated shape similar to that of a bevel gear.

The inclination angle θ is formed to coincide with an inclination angle of the row of teeth 43 the second planer teeth 40 to collapse, passing through the oppressive section 53 of the rotation adjustment element 50 is elastically deformed.

If a section of the row of teeth 43 the second planer teeth 40 thereby with the row of teeth 22 the first planer toothing 20 engages, the entire area along a tooth course can intervene.

Therefore, a reliable engaging relationship can be obtained, a phenomenon such as tooth skipping can be prevented, and reliable torque transmission can be obtained.

In the present invention, the face gear is a concept having a gear having a row of teeth arranged annularly on a plane perpendicular to an axis of rotation (Access), a gear having a row of teeth arranged annularly on a conical surface which has a predetermined inclination angle θ formed with respect to the rotation axis as described above, or the like.

The attachment section 23 is formed to the first planer teeth 20 at the attachment portion 11c of the first rotor arranged in a housing 11 to fix. What the attachment section 23 concerns, when the attachment section 11c For example, has a convex portion, the attachment portion 23 may be formed as a concave portion to be fitted to the convex portion, or may have a screw structure or the like.

The first planer toothing 20 is therefore on the first rotor arranged in a housing 11 over the attachment section 23 attached and configured to be integral with the rotor disposed in a housing 10 around the axis S to rotate.

The spacer element 30 has a central hole 31 , the storage section 32 , a joining surface 33 , an end surface 34 , an annular collar portion 35 and two limiting sections 36 extending in a radial direction out of the circular collar portion 35 protrude.

The central hole 31 is formed to have an inside diameter dimension through which a fastening bolt B passes.

The storage section 32 is in the inner circumferential section 11b of the first rotor arranged in a housing 11 fitted and formed as a cylindrical surface around the rotor disposed in a housing 10 around the axis S rotatable to support.

The joining surface 33 is formed to abut an end surface of the camshaft CS to be joined.

Further, a mating bore (not illustrated) into which a positioning pin (not illustrated) of the camshaft CS is fitted on the joining surface 33 be provided.

The end surface 34 is formed to project annularly with a central portion of a disk portion 42 the second planer teeth 40 to come into contact with the second planetary gearing 40 in cooperation with the fastening bolts B to take in the sandwich.

The annular collar section 35 is formed such that the movement of the first arranged in a housing rotor 11 in the S-axis direction by cooperation with the end surface of the camshaft CS is restricted.

The limiting section 36 is formed to with the restricted section 11d of the first rotor arranged in a housing 11 in a detachable manner in the direction of rotation about the axis S to get in touch.

If the restricted section 11d of the rotor arranged in a housing 10 therefore with the restrictive section 36 of the spacer element 30 in the direction of rotation about the axis S comes into contact, a change region in rotation phase of the arranged in a housing rotor 10 in one direction and the other direction with respect to the camshaft CS limited.

In this way, the second planer teeth 40 when the spacer element 30 is provided with the camshaft CS over the spacer element 30 be connected, and arranged in a housing rotor 10 can be rotatable about the axis S over the spacer element 30 be supported.

Because the spacer element 30 detachable on the camshaft CS Therefore, the phase change unit U can be applied to valve control changing devices of machines of various types by the spacer element 30 each of the types of camshaft CS produced with different specifications. Furthermore, with the spacer element 30 as a reference of the rotor arranged in a housing 10 with the camshaft CS be aligned.

The second plane toothing 40 is formed of a thin plate-like body which is elastically deformable as a whole, for example, a spring steel plate, other elastic bodies or the like having a thickness of 1 millimeter or less or about several millimeters.

The second plane toothing 40 has a central hole 41 on, passes through the fastening bolt B, the disc portion 42 in which a front surface 42a and a back surface 42b are formed, and the row of teeth 43 lying on the back surface 42b of the disc section 42 is formed.

The row of teeth 43 is from the number of teeth Z2 formed by the number of teeth Z1 the first planer toothing 20 is different, and is in an annular arrangement on one Outside edge area of the back surface 42b that backwards R in the S -Achsenrichtung shows formed. Next is the row of teeth 43 by pressing or cutting the disc section 42 educated.

As in 4 also becomes a central area of the back surface 42b of the disc section 42 with the end surface 34 of the spacer element 30 brought into contact, the fastening bolt B passes through the central holes 41 and 31 through to into a screw hole CS1 of the camshaft CS to be screwed, and thereby becomes the second planer teeth 40 mated to be integral with the camshaft CS to rotate.

Next is the second planer teeth 40 in a joining state of two pressing portions as described above 53 of the rotation adjustment element 50 on an outer edge portion of the front surface 42a of the disc section 42 pressed, by pressing on two sections, which are on a straight line perpendicular to the axis S are arranged, elastically deformed, and thereby engages a portion of these areas of the row of teeth 43 in the row of teeth 22 the first planer toothing 20 one.

The rotation adjustment element 50 has a cylindrical section 51 around the axis S , two arm sections 52 extending in a radial direction from the cylindrical portion 51 extend, the two pressing sections 53 placed on a distal end side of the arm sections 52 are provided, and the slot-shaped connecting portion 54 which is attached to the cylindrical section 51 is formed on.

The cylindrical section 51 is formed to have an inside diameter dimension through which the fastening bolt B can be inserted. An outer circumferential surface 51a of the cylindrical section 51 is also formed to from the second arranged in a housing rotor 12 over the camp RB rotatably supported.

In an assembling state, each of the arm portions becomes 52 formed to extend in a direction of a straight line L, which is the inclination angle θ with respect to the axis S such that the pressing sections 53 the second planer toothing 40 only elastically deform by the angle θ.

Each of the oppressive sections 53 has a rolling element 53a on, at a mounting hole 52a placed on a distal end side of each of the arm sections 52 is formed, is arranged.

The rolling element 53a is configured to roll while holding the front surface 42a the second planer teeth 40 pushes and elastically deformed.

Here, as the rolling element 53a a ball bearing having an inner ring and an outer ring, a roller rotatably supported by a support shaft in the mounting hole 52a is supported, a spherical body, which is rollable in the mounting hole 52a fitted, and various types of other forms are used.

The connecting section 54 is formed in a slot shape in which the cylindrical portion 51 is cut out such that a drive shaft (not illustrated) of the electric motor DM, which exerts a rotary driving force as an external force, is detachably attached thereto.

In a state where the rotation adjustment element 50 as in 4 Therefore, press the two pressing sections 53 on two sections of the second planer teeth 40 and deform it such that a section of the row of teeth 43 at these areas in the row of teeth 22 the first planer toothing 20 intervenes.

If then the rotation adjustment 50 in one direction or the other direction around the axis S by the driving force of the electric motor DM is rotated, then moves the engagement area of the second face gear 40 ,

Because the second planer teeth 40 from the two pressing sections 53 pressed on two sections and elastically deformed, and the area in the first planer teeth 20 engages two sections at equal intervals in a circumferential direction about the axis S is set, becomes a balance around the axis S ensured, and a smooth rotation operation is obtained.

The role continues 53a each of the pressing sections 53 the second planer toothing 40 elastically deformed while in conformity with rotation of the Rotationsseinstellelements 50 rolls, the engaging portion can be smoothly moved while frictional resistance or the like is inhibited.

Since the engagement between the splines of the first spline 20 and the second planer teeth 40 Having the configuration described above, having mirror symmetry with a center of engagement as a plane of symmetry, can be inhibited.

Further, the second rotating body (the camshaft CS ) with respect to the first rotating body (the rotor disposed in a housing 10 ) by appropriately selecting the number of teeth Z1 the first planer toothing 20 and the number of teeth Z2 the second planer teeth 40 slowed or accelerated. In this device, the phase change unit U functions as a reduction gear.

In the phase change unit U having the configuration described above becomes a relationship between the number of teeth Z1 the first planer toothing 20 and the number of teeth Z2 the second planer teeth 40 is set so that a relationship of Z2 = Z1 ± n · N is satisfied when the number of engaging portions of the second face gear 40 is N and a positive integer is n.

In this embodiment, N = 2 and n = 1 are assumed, and the relationship is set as Z1 = 102 and Z2 = Z1-2 = 100.

When the rotation of the rotation adjustment element 50 an input and the rotation of the second face gear 40 is an output, a reduction ratio i = (Z1-Z2) / Z2 = (102-100) / 100 = 1/50 is also satisfied.

Accordingly, it is possible to rotate the second face gear 40 to 1/50 with respect to a rotation of the rotation adjustment member 50 to slow down.

Therefore, a large reduction ratio can be obtained, and a reduction ratio can easily be easily adjusted by appropriately setting the number of teeth Z1 the first planer toothing 20 and the number of teeth Z2 the second planer teeth 40 to be obtained.

Therefore, when the electric motor DM is used as an external force, downsizing of the electric motor DM is possible.

Next, an operation of the above-described phase change unit U will be described.

When the phase change is not performed, that is, when the valve timing is not changed, first, no rotational driving force is applied to the rotation timing member 50 exercised.

The first planer toothing 20 and the second planetary gearing 40 are therefore locked at a position where they interlock.

As a result, the camshaft is rotating CS and the rotor accommodated in a housing 10 integral in one direction (CR direction in 1 that is, CW (clockwise) direction) about the axis.

On the other hand, when the phase change is performed, that is, when the valve timing is changed, a rotation driving force is applied to the rotation timing member 50 through the electric motor DM exercised.

When the rotation adjustment element 50 for example in one direction around the axis S (CW (clockwise) direction in 1 ) is rotated, rotate the second planer teeth 40 and the camshaft CS in the other direction (CCW (counterclockwise direction in 1 ) with respect to the first spline 20 and the rotor accommodated in a housing 10 ,

When the rotation adjustment element 50 Therefore, subsequently several times in one direction (CW direction) is rotated, a rotation phase of the camshaft CS in relation to the rotor arranged in a housing 10 is delayed, and an opening / closing control of an intake valve or an exhaust valve thereof is changed to a delayed angle side.

On the other hand, if the rotation adjustment 50 in the other direction around the axis S (CCW direction in 1 ) is rotated, rotate the second planer teeth 40 and the camshaft CS in one direction (CW direction in 1 ) with respect to the first spline 20 and the rotor accommodated in a housing 10 ,

When the rotation adjustment element 50 Therefore, subsequently several times in the other direction (CCW direction) is rotated, a rotation phase of the camshaft CS in relation to the rotor arranged in a housing 10 is presented, and an opening / closing control of the intake valve or the exhaust valve thereof is changed to a leading angle side.

When the rotation adjustment element 50 therefore in one direction (CW direction in 1 ), a retard angle operation is performed, and when the rotation adjustment member 50 in the other direction (CCW direction in 1 ) is rotated, a lead angle operation is performed.

As described above, according to the phase change unit U having the above-described configuration, since a structure of splines meshing with each other is used, one phase can be changed easily while simplifying the structure, reducing the number of parts, downsizing the device or the like is achieved.

As the elastically deformable thin plate-shaped second planer teeth 40 is used as a planer toothing, the structure of the Planetary gears that intermesh with each other such that the engaging portion with the first face gear 20 can then be changed, a measure in the S-axis direction can be reduced.

Further, according to the phase change unit U, since a reduction ratio can be increased, a relative rotation phase between the rotor disposed in a housing 10 and the camshaft CS be easily changed by using an external force such as the electric motor DM with a low output or the like.

Although in the embodiments described above, the first face gear 20 separate from the first rotor disposed in a housing 11 is formed and then fixed, the present invention is not limited thereto, and the first face gear may be formed integrally with the first rotor arranged in a housing.

Although in the embodiment described above, in which the bearing portion 32 of the spacer element 30 directly into the inner circumferential section 11b of the rotor arranged in a housing 11 is fitted and arranged in a housing rotor 11 rotatable supports, the present invention is not limited thereto, and a bearing that the bearing RB similar, can be inserted between the two.

The 10 to 13 illustrate a valve timing changeover apparatus in which a phase change unit U 'according to another embodiment is provided.

This embodiment is the same as the embodiment described above, except that the spacer element described above 30 is eliminated, a first planer teeth 20 ' with a camshaft CS is connected, and an elastically deformable second planer teeth 40 ' with a rotor disposed in a housing 10 ' connected is. The same components are therefore designated by the same reference numerals, and their description is omitted.

As in the 10 to 13 illustrates, the phase change unit U 'has a rotor disposed in a housing 10 ' as the first rotating body, the first planer toothing 20 ' integral with the camshaft CS rotates as a second rotating body, the second planer teeth 40 ' integral with the rotor disposed in a housing 10 ' rotates, and a rotation adjustment 50 on.

The arranged in a housing rotor 10 ' has a first rotor disposed in a housing 11 ' on, and a second arranged in a housing rotor 12 with the first rotor arranged in a housing 11 ' is connected using bolts b1.

The first arranged in a housing rotor 11 ' has a pinion 11a an annular inner peripheral portion 11b ' into which a storage section 24 ' the first planer toothing 20 ' is fitted, a plurality of recessed retention sections 11c ' for hooking hook parts 44 ' the second planer teeth 40 ' , the cylindrical section 11e , and a plurality of bolt holes 11f in which the bolts b1 on an outer circumference of the cylindrical portion 11e be screwed on.

The inner circumferential section 11b ' is formed to have an inside diameter dimension into which a bearing RB 'with the bearing portion 24 ' the first planer toothing 20 ' fitted.

The plurality of recessed retention sections 11c ' is in a circumferential direction on an inner peripheral wall of the cylindrical portion 11e educated.

Then, the plurality receives recessed retention sections 11c ' the majority of hook parts 44 ' the second planer teeth 40 ' and hook it up, and that's the second planer gearing 40 ' formed to be integral with the rotor disposed in a housing 10 ' to rotate.

The first planer toothing 20 ' has an annular flat plate portion 21 , a row of teeth 22 placed in the annular flat plate section 21 is formed, a recessed fitting section 23 ' to which the camshaft CS fitted, a cylindrical bearing section 24 ' and a central hole 25 ' through which a fastening bolt B passes on.

The row of teeth 22 is from the number of teeth Z1 is formed and formed in a ring-shaped arrangement on a surface facing F in an S-axis direction.

Here, similar to the embodiment described above, the row of teeth 22 in a conical shape around the axis S having a predetermined inclination angle θ with respect to the axis S is formed, formed. The first planer toothing 20 ' is therefore formed to have a serrated shape similar to that of a bevel gear.

The recessed passport section 23 ' is formed to have an inner diameter dimension, to which the end portion of the camshaft CS is fit.

A fitting bore 23a ' into which a positioning pin (not illustrated) of the camshaft CS is on a lower surface of the recessed passport section 23 ' intended.

The storage section 24 ' is formed to have an outer diameter dimension into which the bearing RB 'is fitted.

The second plane toothing 40 ' is formed of a thin plate-like body which is elastically deformable as a whole, for example, a spring steel plate, other elastic bodies or the like, which has a thickness of 1 millimeter or less or about several millimeters and is formed in an annular flat plate shape /are.

The second plane toothing 40 ' has a central hole 41 ' , an annular disc section 42 ' in which a front surface 42a ' and a back surface 42b ' are formed, a row of teeth 43 lying on the back surface 42b ' the annular disc portion 42 ' is formed, and a plurality of hook parts 44 ' acting in a radial direction on an outer edge portion of the annular disc portion 42 ' protrude, up.

The row of teeth 43 is from the number of teeth Z2 formed by the number of teeth Z1 the first planer toothing 20 ' is different, and is in an annular arrangement on an outer edge portion of the back surface 42b ' formed rearward R in the S-axis direction.

Next is the row of teeth 43 by pressing or cutting the disc section 42 ' educated.

As in 11 illustrates when the second spline 40 ' in the first rotor arranged in a housing 11 ' is arranged and the plurality of hook parts 44 ' through the plurality of recessed retention sections 11c ' is hooked, the second planer teeth 40 ' mated to rotate integrally with the rotor 10 'disposed in a housing.

Next is the second planer teeth 40 ' in an assembly state, as described above, of two pressing sections 53 of the rotation adjustment element 50 elastically deformed by being pressed on two sections, which are on a straight line perpendicular to the axis S are arranged, and thereby engages a portion of these areas of the row of teeth 43 in the row of teeth 22 the first planer toothing 20 ' one.

Further, in areas other than the depressed area and the engaging area due to the pressing portion 53 the second planer toothing 40 ' held in a state in which the pressing section 53 and the first planer teeth 20 ' are not in contact with each other.

According to the configuration described above, since the first spline 20 ' detachable on the camshaft CS is arranged and rotatably disposed in a housing rotor 10 ' supports, the phase change unit U to various types of camshaft CS be applied by the first spline 20 ' just any type of camshaft CS is produced accordingly. Next can with the spacer element 20 ' as a reference of the rotor arranged in a housing 10 ' with the camshaft CS be aligned.

Because the second planer teeth 40 ' the majority of hook parts 44 ' on an outer edge portion thereof, and the rotor disposed in a housing 10 ' the plurality of recessed retention sections 11c ' has on the inner peripheral wall thereof, the second planer teeth 40 ' and the rotor disposed in a housing 10 ' be readily joined together so that both integrally by mere fitting and hooking the hook parts 44 ' the second planer teeth 40 ' at the recessed retention sections 11c ' of the rotor arranged in a housing 10 ' be hooked.

According to the phase change unit U 'having the above-described configuration, since a structure of splines meshing with each other is used, a phase can be easily changed while simplifying the structure, reducing the number of parts, downsizing the device, or the like is achieved.

In particular, since the elastically deformable thin plate-shaped second planer teeth 40 ' is used as a planer toothing, the structure of the face gears, which engage with each other such that the engaging portion with the first face toothing 20 ' is subsequently changed, is used, a measure in the S-axis direction can be reduced.

Further, according to the phase change unit U ', the reduction ratio can be increased, a relative rotation phase between the arranged in a housing rotor 10 ' and the camshaft CS be readily changed by using an external force such as a low-output electric motor DM or the like.

Next, an operation of the above-described phase change unit U 'will be described.

When the phase change is not performed, that is, when the valve timing is not changed, first, no rotational driving force is applied to the rotation timing member 50 exercised.

The first planer toothing 20 ' and the second planetary gearing 40 ' are therefore locked at a position where they interlock.

As a result, the camshaft is rotating CS and the rotor accommodated in a housing 10 ' integral in one direction (CR direction in 1 , ie CW direction) about the axis S ,

On the other hand, when the phase change is performed, that is, when the valve timing is changed, a rotation driving force is applied to the rotation timing member 50 exercised by the electric motor DM.

When the rotation adjustment element 50 for example in one direction around the axis S (CW direction in 1 ) is rotated, rotate the second planer teeth 40 ' and the rotor disposed in a housing 10 ' in the other direction (CCW direction in 1 ) with respect to the first spline 20 ' and the camshaft CS ,

When the rotation adjustment element 50 Subsequently, several times in one direction (CW direction) is rotated, consequently, a rotation phase of the camshaft CS with respect to the rotor arranged in a housing 10 ' is delayed, and an opening / closing control of an intake valve or an exhaust valve thereof is changed to a leading angle side.

On the other hand, if the rotation adjustment 50 in the other direction around the axis S (CCW direction in 1 ) is rotated, rotate the second planer teeth 40 ' and the rotor disposed in a housing 10 ' in one direction (CW direction in 1 ) with respect to the first spline 20 ' and the camshaft CS ,

When the rotation adjustment element 50 Consequently, subsequently several times in the other direction (CCW direction) is rotated, the rotation phase of the camshaft CS with respect to the rotor arranged in a housing 10 ' is delayed, and an opening / closing control of the intake valve or the exhaust valve thereof is changed to a delayed angle side.

When the rotation adjustment element 50 therefore in one direction (CW direction in 1 ) is rotated, a lead angle operation is performed, and when the rotation adjustment element 50 in the other direction (CCW direction in 1 ), a retard angle operation is performed.

As described above, according to the phase change unit U 'having the above-described configuration, since the structure of splines meshing with each other is used, one phase can be easily changed while simplifying the structure, reducing the number of parts, reducing the device or the like is achieved.

In particular, since the elastically deformable thin plate-shaped second planer teeth 40 ' for subsequently changing the engaging portion with the first face gear 20 ' is used as a face gear that forms the structure of face gears that mesh with each other, a dimension in the S-axis direction can be decreased.

Further, according to the phase change unit U ', the reduction ratio can be increased, a relative rotation phase between the arranged in a housing rotor 10 ' and the camshaft CS be easily changed by using an external force such as the electric motor DM with a low output or the like.

Although in the embodiment described above, a case where the plurality of hook parts 44 ' in the second spline 40 ' is arranged, and the plurality of recessed retaining portions 11c ' in the first rotor arranged in a housing 11 ' The present invention is not limited thereto, and a hook part and a recessed retaining portion may be used, or other restricting means may be employed as long as they have a configuration in which relative rotation can be restricted.

Although in the above-described two embodiments, a case has been described in which two pressing portions 53 as a pressing portion of the rotation adjusting member 50 are employed, the present invention is not limited thereto, and a pressing portion, three pressing portion or more pressing portions may be employed.

In this case, a relationship between the number of teeth Z1 the first planer teeth and the number of teeth Z2 of the second face gear is set such that a relationship of Z2 = Z1 ± n · N is satisfied when the number of engaging portions corresponding to the number of pressing portions of the second face gear is N and the positive integer is n.

Further, although a case is described in the above-described two embodiments was in which the number of teeth Z1 the first planer toothing 20 and 20 ' 102 is, and the number of teeth Z2 the second planer teeth 40 and 40 ' 100 is not limited to the present invention, and it can be suitably selected within a range satisfying the above-described formula.

Although in the two embodiments described above, a case has been described in which the row of teeth 22 the first planer toothing 20 or 20 ' in a conical shape around the axis S is formed, the present invention is not limited thereto, and on the other hand, the row of teeth of the first planer teeth on a plane perpendicular to the axis S can be formed, and the row of teeth of the second face gear can be formed in a conical shape about the axis.

Although, in the above-described two embodiments, the phase change units U and U 'serving as speed reducers applied to valve timing changing devices have been described as the phase change unit, the present invention is not limited thereto and may be applied to reduction gears, gears or the like in one mechanism , a device or the like, in which a relative rotation phase between two rotating bodies has to be changed.

LIST OF REFERENCE NUMBERS

CS

Camshaft (second rotating body)

S

axis

RB, RB '

Bearings (radial bearing)

10, 10 '

Rotor arranged in a housing (first rotating body)

11, 11 '

First rotor arranged in a housing

11c '

Recessed retaining section

11d

Restricted section

12

Second rotor arranged in a housing

20, 20 '

First planer toothing

22

teeth

23 '

Recessed passport section

24 '

bearing section

30

Spacer element

32

bearing section

36

Restrictive section

40, 40 '

Second toothing

40, 41 '

Central drilling

43

teeth

44 '

hook part

50

Rotationseinstellelement

53

Pressing section

53a

Rolling element

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• JP 3937164 [0005]

Claims (13)

Phase change unit that alternates a relative rotational phase between a first rotating body and a second rotating body rotating about a predetermined axis, the phase change unit comprising: a first face gear that rotates integrally with one of the first rotating body and the second rotating body; an elastically deformable thin plate-shaped second face gear that rotates integrally with the other of the first rotating body and the second rotating body and has a tooth number that is different from a tooth number of the first face gear; and a rotation adjusting member that is rotationally adjusted around the axis by an external force so as to elastically deform the second face gear to engage a portion of the row of teeth thereof with the first face gear, and an engaging portion of the second face gear is moved. Phase change unit after Claim 1 wherein one of the row of teeth of the first planer toothing and the row of teeth of the second planer toothing is formed in a conical shape about the axis. Phase change unit after Claim 1 or 2 wherein the rotation adjusting member has a plurality of pressing portions that press and elastically deform the second face gear at a plurality of portions. Phase change unit after Claim 3 wherein the pressing portions comprise a rolling element which rolls while in contact with the second face gear. Phase change unit according to one of Claims 1 to 4 wherein: the first rotating body has a rotor disposed in a housing in which the first face gear, the second face gear and the rotation adjusting element are received, the first face gear is connected to the rotor disposed in a housing to rotate integrally therewith second face gear is connected to the second rotating body so as to rotate integrally therewith, and the rotation adjusting member is rotatably supported with respect to the rotor disposed in a housing. Phase change unit after Claim 5 wherein the second face gear is connected to the second rotating body via a spacer member, and the spacer member has a bearing portion rotatably supporting the rotor disposed in a housing. Phase change unit after Claim 6 wherein the spacer member has a restricting portion restricting a relative rotation range between the first rotating body and the second rotating body, and the rotor disposed in a housing has a restricted portion with which the restricting portion comes into contact. Phase change unit according to one of Claims 5 to 7 wherein: the rotor disposed in a housing includes: a first rotor disposed in a housing in which the first face gear is disposed; and a second rotor disposed in a housing connected to the first rotor disposed in a housing, and the second rotor disposed in a housing having a bearing portion rotatably supporting the rotational adjusting member about the axis. Phase change unit according to one of Claims 1 to 4 wherein: the first rotating body has a rotor disposed in a housing in which the first face gear, the second face gear and the rotation adjusting element are received, the first face gear is connected to the second rotating body for integrally rotating the second face gear is connected to the first rotating body to rotate integrally therewith, the rotation adjusting member is rotatably supported with respect to the rotor disposed in a housing. Phase change unit after Claim 9 wherein the first face gear has a bearing portion rotatably supporting the rotor disposed in a housing. Phase change unit after Claim 9 or 10 wherein the second face gear has a hook portion on an outer edge portion thereof, and the rotor disposed in a housing has a recessed retaining portion hooking the hook portion on a circumferential wall thereof. Phase change unit according to one of Claims 9 to 11 wherein: the rotor disposed in a housing comprises: a first rotor disposed in a housing, which is connected to the second face gear to rotate integrally therewith; and a second rotor disposed in a housing, which is connected to the first arranged in a housing rotor, and the second rotor arranged in a housing has a bearing portion which rotatably supports the rotation adjusting element about the axis. A valve timing changing device comprising a phase change unit that changes a relative rotational phase between a rotor disposed in a housing forming a first rotating body and a cam shaft constituting a second rotating body, the valve timing changing device controlling an opening / closing control of an intake valve of an exhaust valve driven by the camshaft changes, the phase change unit changing the phase change unit according to one of Claims 1 to 12 is.

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