JP2009185785A - Valve timing adjusting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve timing adjusting device for making both compatible in high productivity and a highly accurate valve timing adjustment. <P>SOLUTION: A bottomed cylindrical driving side rotary body 10 extending a timing chain 16 between a crankshaft and itself and interlocking and rotating with the crankshaft by the transmission of engine torque, has a peripheral wall member 110 coaxially fastened with a sun gear 12 meshing with a planetary gear 50 for changing a phase between rotary bodies 10 and 20 by planetary motion and storing a driven side rotary body 20 interlocking and rotating with a camshaft 2, and a bottom wall member 100 coaxially fastened with the peripheral wall member 110, forming a bottomed cylindrical shape together with the peripheral wall member 110 and wound with the timing chain 16. The sun gear 12 is fitted to the inner peripheral side of one end part 112 in the axial direction of the peripheral wall member 110, and the bottom wall member 100 is fitted to the outer peripheral side of the other part 111 in the axial direction of the peripheral wall member 110. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a valve timing adjusting device that adjusts the valve timing of a valve that opens and closes a camshaft by transmission of engine torque from a crankshaft in an internal combustion engine.

  Conventionally, by changing the relative phase between the driving side rotating body that rotates in conjunction with the crankshaft and the driven side rotating body that rotates in conjunction with the camshaft (hereinafter referred to as “phase between rotating bodies”), the desired There is known a valve timing adjusting device which realizes the above valve timing.

For example, in Patent Document 1, a sun gear is coaxially fastened on the side opposite to the bottom wall portion with respect to the drive side rotating body that is formed in a bottomed cylindrical shape and accommodates the driven side rotating body in the peripheral wall portion. A valve timing adjusting device is disclosed in which the phase between the rotating bodies is changed by the planetary movement of the planetary gear meshed with the sun gear that rotates integrally with the driving side rotating body.
Japanese Patent Laying-Open No. 2007-255412 (FIG. 10)

  Now, an annular timing chain is spanned between the crankshaft and the driving side rotating body formed as a sprocket in the device of Patent Document 1, and the engine torque is transmitted through the timing chain. Therefore, a plurality of teeth for timing chain are provided on the bottom wall portion of the drive-side rotator that has a bottomed cylindrical shape, and the shape of the drive-side rotator becomes complicated as a whole. Yes. In order to form such a drive-side rotating body having a complicated shape, for example, a complicated operation such as cutting the most part of the blank formed into a columnar shape is required, leading to a decrease in productivity.

  Therefore, the present inventors adopt a technique for forming a bottomed cylindrical drive-side rotating body by separating and forming the peripheral wall portion and the bottom wall portion of the driving-side rotating body into two members and fastening them coaxially. Therefore, we have intensively studied methods for facilitating the formation work of these two members. As a result, the transmission of the engine torque is caused by the fact that the sun gear meshing with the planetary gear and the bottom wall forming member on which the timing chain is hung are integrated on the same axis with the peripheral wall forming member interposed therebetween. It was found that sometimes the bottom wall forming member and the sun gear may be displaced from each other. According to such displacement of the bottom wall forming member and the sun gear, the peripheral wall forming member between these elements is twisted to bend and deform in the radial direction, causing a phase shift between the rotating bodies, and thus a valve timing shift. Therefore, the present inventors have come up with the present invention through further research.

  As described above, an object of the present invention is to provide a valve timing adjusting device that achieves both high productivity and highly accurate valve timing adjustment.

  The invention according to claim 1 is a valve timing adjusting device for adjusting a valve timing of a valve that opens and closes a camshaft by transmission of engine torque from a crankshaft in an internal combustion engine, and has a bottomed cylindrical shape, The engine torque is transmitted through an annular torque transmission member spanned between the shaft and the drive side rotating body that rotates in conjunction with the crankshaft, and is housed in the drive side rotating body and interlocked with the camshaft. A valve timing adjusting device comprising: a driven driven rotating body that rotates; a sun gear that rotates integrally with the driving side rotating body; and a planetary gear that changes the phase between the rotating bodies by moving in a planetary manner while meshing with the sun gear. The driving-side rotating body includes a peripheral wall member that receives the driven-side rotating body with the sun gear fastened coaxially, and a peripheral wall member that is fastened together with the peripheral wall member. It has a bottomed cylindrical shape and has a bottom wall member on which a torque transmission member is hung, and one of the sun gear and the bottom wall member is fitted to the inner peripheral side of one end portion in the axial direction of the peripheral wall member, The other of the bottom wall members is fitted to the outer peripheral side of the other end portion in the axial direction of the peripheral wall member.

  According to the invention described in claim 1, since the bottomed cylindrical drive-side rotating body is formed by coaxially fastening the peripheral wall member to the bottom wall member, the separated peripheral walls are formed. It is possible to facilitate the forming operation for each of the member and the bottom wall member and increase productivity.

  According to the first aspect of the present invention, the sun gear meshing with the planetary gear and the bottom wall member on which the torque transmission member for transmitting the engine torque is engaged are respectively fitted to both ends in the axial direction of the peripheral wall member. By doing so, it is integrated on the same axis with the peripheral wall member interposed therebetween. However, one of the sun gear and the bottom wall member is fitted to the inner peripheral side of the one end portion, and the other of the sun gear and the bottom wall member is fitted to the outer peripheral side of the other end portion, Even if it is twisted between the sun gear and the bottom wall member that are going to be displaced from each other during transmission, it is difficult to bend and deform in the radial direction. According to this, since the shift of the phase between the rotating bodies due to the bending deformation of the peripheral wall member is suppressed, the adjustment accuracy of the valve timing determined by the phase between the rotating bodies can be increased.

  In the invention according to claim 2, one of the sun gear and the bottom wall member is fitted in the inner peripheral side of one axial end portion of the peripheral wall member in a press-fit state, and the other of the sun gear and the bottom wall member is the peripheral wall. The member is fitted to the outer peripheral side of the other end portion in the axial direction of the member in a press-fitted state of the other end portion. According to the invention described in claim 2, the press-fitted state is secured at the fitting interface between the sun gear and the peripheral wall member and between the bottom wall member and the peripheral wall member. At both ends, the allowance for deformation in the radial direction substantially disappears. According to this, since the suppression effect becomes high about the shift | offset | difference of the phase between rotary bodies resulting from the bending deformation to the radial direction of a surrounding wall member, more highly accurate valve timing adjustment is realizable.

  In the invention according to claim 3, the drive-side rotator includes a fastening member that fastens the peripheral wall member and the bottom wall member in a bottomed cylindrical shape, and the sun gear is connected to the peripheral wall member and the bottom wall member by the fastening member. It is tightened together. According to the invention described in claim 3, the sun gear, the peripheral wall member, and the bottom wall member are fastened through the common fastening member, and accordingly the sun gear and the bottom wall member are displaced. The torsion of the peripheral wall member can be suppressed by the fastening member. According to this, as described above, one of the sun gear and the bottom wall member is fitted on the inner peripheral side of the one end portion of the peripheral wall member, and the other of the sun gear and the bottom wall member is on the outer peripheral side of the other end portion of the peripheral wall member. Combined with the fitting, the peripheral wall member is hardly bent and deformed in the radial direction, and the phase shift between the rotating bodies and the valve timing shift are sufficiently suppressed. Moreover, the sun gear is fastened together with the peripheral wall member and the bottom wall member by using the fastening member that forms the drive side rotating body by fastening the peripheral wall member and the bottom wall member into a bottomed cylindrical shape. Therefore, it can contribute to the improvement of productivity.

  According to a fourth aspect of the present invention, the bottom wall member is a sprocket having a plurality of teeth with which the torque transmission member is engaged. Since the engine torque is transmitted with high efficiency to the bottom wall member as a sprocket in which the torque transmission member engages with a plurality of teeth in this way, for example, when transmitting a large engine torque, the sun gear and the bottom wall member Is likely to occur. However, as described above, the peripheral wall member has one of the sun gear and the bottom wall member fitted on the inner peripheral side of one end, and the other of the sun gear and the bottom wall member is fitted on the outer peripheral side of the other end. Regardless of the positional shift between the sun gear and the bottom wall member, it is difficult to bend and deform in the radial direction. Therefore, it is possible to reliably suppress the phase shift between the rotating bodies due to the bending deformation of the peripheral wall member, and hence the valve timing shift, even if the engine torque increases.

  According to the fifth aspect of the present invention, the peripheral wall member has a stepped stopper surface portion on the inner peripheral surface that regulates a change in phase between the rotating bodies by contacting the driven rotating body in the rotation direction. As described above, when the stopper surface portion of the inner peripheral surface of the peripheral wall member comes into contact with the driven side rotating body in the rotational direction, there is a concern that the peripheral wall member is deformed in the radial direction. However, as described above, one of the sun gear and the bottom wall member is fitted on the inner peripheral side of the one end, and the other of the sun gear and the bottom wall member is fitted on the outer peripheral side of the other end is the radial direction. It is difficult to bend and deform. Therefore, even when the driven-side rotator is in contact with the stopper surface portion, the phase difference between the rotators can be suppressed and the valve timing adjustment accuracy can be improved. Moreover, a stepped stopper surface portion is easily formed on the inner peripheral surface of the peripheral wall member from which the bottom wall member is separated in the bottomed cylindrical drive-side rotating body. It is also possible to suppress a decrease in property.

  According to the invention described in claim 6, the peripheral wall member is formed in a straight cylindrical shape in the axial direction. As described above, since the cylindrical peripheral wall member straight in the axial direction can be easily formed, productivity can be further increased.

  As in the invention described in claim 7, the peripheral wall member and the bottom wall member separated from each other are formed by cutting a near net shape molded body, respectively, thereby reducing the amount of cutting as much as possible. Thus, it can contribute to the improvement of productivity.

  Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. In addition, the overlapping description is abbreviate | omitted by attaching | subjecting the same code | symbol to the corresponding component in each embodiment.

(First embodiment)
FIG. 1 shows a valve timing adjusting apparatus 1 according to a first embodiment of the present invention. The valve timing adjusting device 1 is mounted on a vehicle and installed in a transmission system that transmits engine torque from a crankshaft (not shown) of an internal combustion engine to a camshaft 2. In this embodiment, the camshaft 2 opens and closes an intake valve (not shown) of the “valve” of the internal combustion engine by transmitting the engine torque, and the valve timing adjusting device 1 controls the valve timing of the intake valve. Adjust.

(Basic configuration)
Hereinafter, the basic configuration of the first embodiment will be described. The valve timing adjusting device 1 is formed by combining an electric motor 4, an energization control circuit unit 7, a phase adjusting mechanism 8, and the like.

  The electric motor 4 is, for example, a brushless motor or the like, and includes a motor case 5 fixed to a fixed node of the internal combustion engine and a motor shaft 6 supported by the motor case 5 so as to be rotatable forward and backward. The energization control circuit unit 7 includes a drive driver and its control microcomputer, and is disposed outside and / or inside the motor case 5 and electrically connected to the electric motor 4. The energization control circuit unit 7 rotationally drives the motor shaft 6 by controlling energization to the electric motor 4.

  The phase adjusting mechanism 8 includes a driving side rotating body 10, a sun gear 12, a driven side rotating body 20, a planetary carrier 40, and a planetary gear 50.

  As shown in FIGS. 1 to 3, the drive-side rotating body 10 and the sun gear 12 both having a bottomed cylindrical shape are fastened on the same axis in a state where the openings are overlapped with each other, thereby adjusting the phase. An accommodation space 14 for accommodating the other components 20, 40, 50 of the mechanism 8 is formed.

  The drive-side rotator 10 has a plurality of teeth 15 projecting radially outward in the rotational direction. The drive-side rotator 10 is linked to the crankshaft by an annular timing chain 16 being spanned between the teeth 15 and a plurality of teeth (not shown) of the crankshaft. By this connection, when the engine torque of the crankshaft is transmitted to the drive side rotator 10 through the timing chain 16, the drive side rotator 10 rotates integrally with the sun gear 12 in conjunction with the crankshaft. Here, the rotation direction of the drive side rotating body 10 and the sun gear 12 is set to the clockwise direction of FIGS.

  As shown in FIGS. 1 and 2, the sun gear 12 forms a drive-side internal gear portion 18 having a tooth tip circle on the inner peripheral side of the root circle by a peripheral wall portion.

  As shown in FIGS. 1 and 3, the driven-side rotator 20 has a bottomed cylindrical shape and is concentrically fitted to the inner peripheral side of the drive-side rotator 10. The driven-side rotating body 20 forms a connecting portion 21 that is coaxially connected to the camshaft 2 by screwing, with a bottom wall portion. By this connection, the driven-side rotator 20 can rotate in conjunction with the camshaft 2 and can rotate relative to the drive-side rotator 10. Here, the rotation direction of the driven-side rotator 20 is set in the clockwise direction in FIG.

  The peripheral wall portion of the driven side rotating body 20 forms a driven side internal gear portion 22 having a tooth tip circle on the inner peripheral side of the root circle. Here, the inner diameter of the driven side internal gear portion 22 is set smaller than the inner diameter of the drive side internal gear portion 18, and the number of teeth of the driven side internal gear portion 22 is set smaller than the number of teeth of the drive side internal gear portion 18. Has been. The driven side internal gear portion 22 is arranged so as to be shifted in the axial direction with respect to the drive side internal gear portion 18.

  As shown in FIGS. 1 to 3, the planet carrier 40 has a cylindrical shape as a whole, and an input portion 41 is formed by the inner peripheral surface. The input unit 41 is disposed concentrically with the rotating bodies 10 and 20 and the motor shaft 6. A fitting groove 42 into which the joint 43 is fitted is formed in the input portion 41, and the motor shaft 6 is connected to the planet carrier 40 through the joint 43. By this connection, the planet carrier 40 can rotate together with the motor shaft 6 and can rotate relative to the drive-side rotating body 10 and the sun gear 12.

  The planet carrier 40 further forms an eccentric portion 44 by an outer peripheral surface that is eccentric with respect to the input portion 41. The eccentric portion 44 is fitted concentrically on the inner peripheral side of the center hole 51 of the planetary gear 50 via a bearing 45. By this fitting, the planetary gear 50 is supported by the eccentric portion 44 so as to be capable of planetary movement in accordance with the relative rotation of the planet carrier 40 with respect to the sun gear 12. Here, the planetary motion refers to a planetary motion in which the planetary gear 50 revolves around the eccentric center line of the eccentric portion 44 and revolves in the rotation direction of the planet carrier 40.

  The planetary gear 50 is formed in a stepped cylindrical shape, and a driving-side external gear portion 52 and a driven-side external gear portion 54 having a tip circle on the outer peripheral side of the root circle are formed by a large diameter portion and a small diameter portion, respectively. Yes. The number of teeth of the driving side external gear part 52 and the driven side external gear part 54 is set to be smaller by the same number than the number of teeth of the driving side internal gear part 18 and the driven side internal gear part 22, respectively. The drive-side external gear portion 52 is disposed on the inner peripheral side of the drive-side internal gear portion 18 and meshes with the gear portion 18. The driven-side external gear portion 54 closer to the connecting portion 21 than the drive-side external gear portion 52 is disposed on the inner peripheral side of the driven-side internal gear portion 22 and meshes with the gear portion 22.

  Thus, the phase adjustment mechanism 8 formed by linking the rotating bodies 10 and 20 with the gears changes the phase between the rotating bodies as the relative phase of the driven side rotating body 20 with respect to the driving side rotating body 10 to the rotation state of the motor shaft 6. Adjust accordingly.

  Specifically, when the planetary carrier 40 does not rotate relative to the sun gear 12 due to the motor shaft 6 rotating at the same speed as the drive-side rotator 10, the planetary gear 50 does not perform planetary motion and the rotators 10, 20. And around. Therefore, the phase between the rotating bodies does not change, and thereby the valve timing is maintained.

  On the other hand, when the motor shaft 6 rotates at a high speed with respect to the driving-side rotator 10, the planetary gear 50 rotates in a planetary manner when the planetary carrier 40 rotates relative to the sun gear 12, thereby rotating the driven side. The body 20 rotates relative to the advance side with respect to the driving side rotating body 10. Therefore, since the phase between the rotating bodies changes to the advance side, the valve timing is advanced.

  On the other hand, when the planetary carrier 40 rotates relatively to the retard side with respect to the sun gear 12 due to the motor shaft 6 rotating at a low speed or reversely rotating with respect to the drive side rotating body 10, the planetary gear 50 performs planetary motion. Thus, the driven-side rotator 20 rotates relative to the drive-side rotator 10 toward the retard side. Accordingly, since the phase between the rotating bodies changes to the retard side, the valve timing is retarded.

(Characteristic part)
Hereinafter, the characteristic part of 1st embodiment is demonstrated.

(Driving structure of drive side rotor and sun gear)
As shown in FIG. 1, the drive-side rotator 10 includes a bottom wall member 100, a peripheral wall member 110, and a screw member 120.

  As shown in FIG. 4, the metal bottom wall member 100 is formed in a thick annular plate shape, and constitutes a sprocket that is engaged with the plurality of teeth 15 by the timing chain 16 being hung. The bottom wall member 100 has a fitting hole portion 102 that opens in one end surface 101 in the axial direction by a center hole having a bottomed hole shape. Further, the bottom wall member 100 is formed by forming a through-hole portion 105 that opens to the other end surface 103 in the axial direction and the bottom surface 104 of the fitting hole portion 102 and allows the cam shaft 2 to pass therethrough by a through-hole-shaped center hole. Yes.

  The metal peripheral wall member 110 is formed in a stepped cylindrical shape whose diameter changes in the axial direction, and the end portion 111 on the small diameter side in the axial direction is press-fitted into the fitting hole portion 102 of the bottom wall member 100. It is fitted. In other words, the bottom wall member 100 is fitted to the outer peripheral side of the end portion 111 of the peripheral wall member 110 with the end portion 111 being press-fitted. As shown in FIGS. 3 and 4, the peripheral wall member 110, as shown in FIGS. 3 and 4, allows the peripheral wall member 110 to accommodate the entire driven-side rotating body 20 and a part of each of the planet carrier 40 and the planetary gear 50. Are formed on the inner peripheral side. As shown in FIGS. 2 and 4, the peripheral wall member 110 has a fitting hole 114 that opens in the end surface 113 of the end 112 on the large-diameter side in the axial direction by a bottomed hole-shaped center hole. Yes.

  As shown in FIGS. 3 and 4, the screw member 120 is made of a metal bolt, and a plurality of screw members 120 are provided. Each screw member 120 forms a bottomed cylindrical drive-side rotating body 10 by fastening the bottom wall member 100 and the peripheral wall member 110 coaxially at predetermined locations in the rotational direction.

  As shown in FIGS. 2 and 4, the sun gear 12 has a cylindrical fitting protrusion 130 provided in the opening thereof fitted in the fitting hole 114 of the peripheral wall member 110 in a press-fitted state. That is, the sun gear 12 is fitted into the inner peripheral side of the end 112 of the peripheral wall member 110 in a press-fit state. By such fitting, the sun gear 12 forms a space portion 14 b that accommodates the remaining portions of the planetary carrier 40 and the planetary gear 50 in the accommodation space 14 on the inner peripheral side of the drive-side internal gear portion 18. The sun gear 12 is coaxially connected to the peripheral wall member 110 by being fastened together with the bottom wall member 100 and the peripheral wall member 110 at a plurality of locations in the rotational direction by a plurality of screw members 120 forming the drive side rotating body 10. It is concluded. That is, in the present embodiment, the sun gear 12 and the bottom wall member 100 are coaxially integrated with the peripheral wall member 110 in the axial direction.

(Stopper structure)
As shown in FIG. 3, stepped surface-shaped advance stopper surface portions 140 to 143 are provided at a plurality of locations in the rotation direction on the inner peripheral surface 116 of the peripheral wall member 110 constituting the drive-side rotator 10. Further, at a plurality of locations in the rotation direction on the inner peripheral surface 116 of the peripheral wall member 110, stepped surface shapes are formed so as to face the advance stopper surface portions 140 to 143 having the same reference numerals at the end with an interval in the rotation direction. The retard angle stopper surface portions 150 to 153 are provided.

  As shown in FIGS. 1 and 3, the peripheral wall portion of the driven-side rotator 20 is provided with stopper protrusions 160 to 163 that protrude outward in the radial direction of the driven-side internal gear portion 22 at a plurality of locations in the rotational direction. . Each of the stopper protrusions 160 to 163 is inserted so as to be swingable between the advance stopper surface portions 140 to 143 having the same reference numerals and the retard stopper surface portions 150 to 153 having the same reference numerals. ing.

  In this embodiment, when the stopper protrusion 160 abuts the advance stopper surface 140 on the advance side in the rotation direction, the relative rotation of the driven side rotary body 20 toward the advance side with respect to the drive side rotary body 10, That is, the change to the advance side of the phase between the rotating bodies is regulated. Conversely, when the stopper projection 160 abuts on the retarded stopper surface 150 on the retarded side in the rotational direction, the relative rotation of the driven-side rotating body 20 toward the retarded side with respect to the driving-side rotating body 10, that is, the rotating body. The change to the retard angle side of the interphase is regulated.

  Note that the stopper surface portions 141 and 151 and the stopper protrusion 161, the stopper surface portions 142 and 152 and the stopper protrusion 162, and the stopper surface portions 143 and 153 and the stopper protrusion 163 are set as the stopper surface portions 140 and 150 and It is provided in order to exhibit the above-described phase change regulation function instead when the abnormality occurs in the set of the stopper projections 160.

(Manufacturing method of bottom wall member and peripheral wall member)
The bottom wall member 100 and the peripheral wall member 110 that form the drive-side rotator 10 are each formed by cutting a near net shape molded body.

  Specifically, in the formation of the bottom wall member 100, first, a powder metallurgy material as a raw material is molded and sintered so as to have an annular plate shape close to the final shape, thereby forming a near net shape molded body. A bottom wall member blank is formed. Then, the bottom wall member 100 having the plurality of teeth 15 and the holes 102 and 105 is completed by cutting the peripheral surface and the end surface of the bottom wall member blank.

  In forming the peripheral wall member 110, first, a powder metallurgy material as a raw material is molded and sintered so as to have a cylindrical shape close to the final shape, thereby forming a peripheral wall member blank as a near net shape molded body. To do. Subsequently, the peripheral wall member 110 having the stopper surface portions 140 to 143 and 150 to 153 and the hole portion 114 is completed by cutting the peripheral surface and end surface of the peripheral wall member blank.

  In addition, as a powder metallurgy material which is a raw material for forming the bottom wall member 100 and the peripheral wall member 110, various metal materials can be adopted according to specifications and the like. For example, in this embodiment, alloy steel powder containing copper is used. Adopted. In the present embodiment, the sun gear 12, the driven rotor 20, the planet carrier 40, and the planetary gear 50 are also formed by cutting a near net shape molded body according to the bottom wall member 100 and the peripheral wall member 110. Also good.

  According to the first embodiment described so far, the bottom wall member 100 and the peripheral wall member 110 which are separated and form the driving side rotating body 10 by mutual fastening can be easily individually formed by cutting the near net shape molded body. Can do. Here, in particular, the peripheral wall member 110 in which the stepped surface stopper surfaces 140 to 143 and 150 to 153 are provided on the inner peripheral surface 116 is separated from the bottom wall member 100, so that the stopper surface portions are cut by machining. It can be formed easily. Further, in the first embodiment, the sun gear 12 is fastened to the driving side rotating body 10 by using the screw member 120 for fastening the bottom wall member 100 and the peripheral wall member 110 to form the driving side rotating body 10. Therefore, the fastening structure of the drive side rotating body 10 and the sun gear 12 can be easily obtained. According to such a first embodiment, the productivity of the valve timing adjusting device 1 is increased.

  Further, according to the first embodiment, the sun gear 12 that meshes with the planetary gear 50 and the bottom wall member 100 on which the timing chain 16 that transmits the engine torque is hung are coaxially integrated with the peripheral wall member 110 interposed therebetween. Therefore, there is a concern about positional deviation during engine torque transmission. However, the peripheral wall member 110 in which the sun gear 12 and the bottom wall member 100 are fitted to the inner peripheral side of the one end portion 112 and the outer peripheral side of the other end portion 111, respectively, is twisted between the elements 12 and 100 to be displaced. Even if it receives, since one of the edge parts 112 and 111 is pressed down by the other by radial direction, it will become difficult to bend and deform in the said radial direction. Furthermore, in 1st embodiment, the press-fit state is ensured in the fitting interface between the sun gear 12 and the surrounding wall member 110 and between the bottom wall member 100 and the surrounding wall member 110, and both ends of the surrounding wall member 110 are secured. The deformation allowance for deforming 112 and 111 in the radial direction has substantially disappeared. Moreover, in the first embodiment, the elements 12, 100, 110 are fastened via the common screw member 120, so that the torsion of the peripheral wall member 110 associated with the positional deviation between the elements 12, 100 itself is the screw member 120. Will be suppressed. According to such a first embodiment, when a plurality of teeth 15 are engaged, the engine torque is transmitted with high efficiency through the timing chain 16, and the positional deviation between the elements 12 and 100 is likely to occur. In addition, the deviation of the phase between the rotating bodies due to the bending deformation of the peripheral wall member 110 can be suppressed, and the adjustment accuracy of the valve timing can be improved.

  In addition, according to the first embodiment, when the stopper protrusion 160 of the driven-side rotating body 20 abuts on one of the stopper surface portions 140 and 150 of the inner peripheral surface 116 of the peripheral wall member 110 in the rotation direction, There is concern about bending deformation of the peripheral wall member 110 in the radial direction. However, as described above, in the first embodiment, since the peripheral wall member 110 is difficult to bend and deform in the radial direction, even if the stopper projection 160 is in contact with the stopper surface portions 140 and 150, the rotation member is not The adjustment of the valve timing can be improved by suppressing the phase shift.

  As described above, in the first embodiment, the timing chain 16 corresponds to the “torque transmission member” described in the claims, and the screw member 120 corresponds to the “fastening member” described in the claims. .

(Second embodiment)
As shown in FIG. 5, the second embodiment of the present invention is a modification of the first embodiment. In the second embodiment, the metal bottom wall member 2100 that forms the drive-side rotator 2010 has a cylindrical fitting protrusion having a part of the through hole 105 as a central hole instead of the fitting hole 102. Part 2102 is provided.

  In addition, the metal peripheral wall member 2110 that forms the drive-side rotating body 2010 is formed in a stepped cylindrical shape that changes in diameter in the axial direction, but on the end surface 2113 of the end portion 2111 that becomes the large-diameter side in the axial direction. The opened fitting hole 2114 is formed by a bottomed hole-shaped center hole. The fitting projection 2102 of the bottom wall member 2100 is fitted in the fitting hole 2114 in a press-fitted state. That is, the bottom wall member 2100 is fitted in the inner peripheral side of the end portion 2111 of the peripheral wall member 2110 in a press-fitted state.

  In the sun gear 2012, a fitting hole portion 2014 that opens to one end face 2013 is formed by a center hole having a bottomed hole shape. An end 2112 on the small diameter side in the axial direction of the peripheral wall member 2110 is fitted into the fitting hole 2014 in a press-fit state. In other words, the sun gear 2012 is fitted to the outer peripheral side of the end portion 2112 of the peripheral wall member 2110 with the end portion 2112 being press-fitted.

  As described above, in the second embodiment, in the state where the bottom wall member 2100 and the sun gear 2012 sandwich the peripheral wall member 2110 in the axial direction, these three elements 2012, 2100, and 2110 are coaxial with the screw member 120 of the drive side rotating body 2010. It is fastened together and integrated. Here, the peripheral wall member 2110 in which the bottom wall member 2100 and the sun gear 2012 are respectively fitted to the inner peripheral side of the one end portion 2111 and the outer peripheral side of the other end portion 2112 is located between the elements 2100 and 2012 to be displaced. Even if it receives a torsional force, it is difficult to bend and deform in the radial direction by the same principle as in the first embodiment. Further, the disappearance of the deformation allowance due to the press-fit state being secured at the interface of the fitting that produces such an action, and the suppression of the twist of the peripheral wall member 2110 by the screw member 120 can be achieved as in the first embodiment. Therefore, also according to the second embodiment, it is possible to suppress the phase shift between the rotating bodies due to the bending deformation of the peripheral wall member 2110 and to increase the adjustment accuracy of the valve timing. In addition, in the second embodiment, the bottom wall member 2100 and the peripheral wall member 2110 are individually formed by cutting the near net shape molded body according to the first embodiment, so that the productivity improvement effect can be enjoyed. It can be done.

(Third embodiment)
As shown in FIG. 6, the third embodiment of the present invention is a modification of the second embodiment. In the third embodiment, the metal peripheral wall member 3110 that forms the drive side rotating body 3010 is formed in a straight cylindrical shape that does not substantially change in diameter in the axial direction. Here, the stepped surface-like stopper surface portions 140 to 143 and 150 to 153 (not shown) are also provided on the inner peripheral surface of the peripheral wall member 3110. In the present embodiment, these stopper surface portion forming portions and reference numerals are provided. A straight shape is secured in the axial direction even between numerals having the same end.

  For such a straight-shaped peripheral wall member 3110, the near net shape forming operation for forming the peripheral wall member blank and the cutting operation of the peripheral wall member blank are further facilitated as compared with the stepped shape. A dramatic improvement in sex can be expected.

(Other embodiments)
Although a plurality of embodiments of the present invention have been described above, the present invention is not construed as being limited to these embodiments, and can be applied to various embodiments without departing from the scope of the present invention. .

  Specifically, as a “torque transmission member” for transmitting the engine torque to the drive-side rotor 10, 2010, 3010, for example, the bottom wall members 100, 2100 are hung other than the timing chain 16 as described above. A timing belt that engages with the plurality of teeth 15 may be employed.

  The fitting between the bottom wall member 100, 2100 and the peripheral wall member 110, 2110, 3110 and the fitting between the sun gear 12, 2012 and the peripheral wall member 110, 2110, 3110 are not realized in the press-fit state as described above. Alternatively, it may be realized in a state where a gap is formed at the fitting interface. Further, at least the bottom wall members 100, 2100 and the peripheral wall members 110, 2110, 3110 may be formed by, for example, a metal material other than the above-described cutting of the near net shape molded body by sintering the powder metallurgy material. You may form by the cutting process of the near net shape molded object by forging.

  As a “fastening member” for fastening at least the bottom wall members 100, 2100 and the peripheral wall members 110, 2110, 3110, for example, rivets, pins, etc. may be employed in addition to the screw member 120 as described above. The sun gears 12 and 2012 are fastened to the peripheral wall members 110, 2110, and 3110 by “fastening members” different from those for fastening the bottom wall members 100 and 2100 and the peripheral wall members 110, 2110, and 3110. May be.

  As the phase adjusting mechanism 8, in addition to the configuration in which the planetary gear 50 meshes with the sun gears 12, 2012 and the gear portion 22 of the driven side rotating body 20 as described above, for example, the driving side rotating body 10, 2010, 3010 A configuration in which the driven-side rotator 20 rotates relative to the drive-side rotators 10, 2010, 3010 according to the planetary motion of the planetary gear that meshes only with the fastening sun gear may be employed. As the sun gear fastened to the drive side rotor 10, 2010, 3010, one that meshes with the planetary gear by the external gear portion is adopted in addition to the one that meshes with the planetary gear by the internal gear portion 18 as described above. May be.

  In addition to the above-mentioned device for adjusting the valve timing of the intake valve, the present invention adjusts the valve timing of both the intake valve and the exhaust valve, as well as a device for adjusting the valve timing of the exhaust valve as a “valve”. It can be applied to a device that performs.

It is a figure which shows the basic composition of the valve timing adjustment apparatus by 1st embodiment of this invention, Comprising: It is the II sectional view taken on the line of FIG. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is sectional drawing which expands and shows the phase adjustment mechanism of FIG. It is sectional drawing which expands and shows the phase adjustment mechanism of the valve timing adjustment apparatus by 2nd embodiment of this invention. It is sectional drawing which expands and shows the phase adjustment mechanism of the valve timing adjustment apparatus by 3rd embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Valve timing adjustment device, 2 cam shaft, 4 Electric motor, 7 Current supply control circuit part, 8 Phase adjustment mechanism 10, 2010, 3010 Drive side rotary body, 12, 2012 Sun gear, 14 Housing space, 14a Space part, 15 Teeth, 16 Timing chain (torque transmission member), 18 Drive side internal gear section, 20 Drive side rotary body, 22 Drive side internal gear section, 40 Planet carrier, 50 Planet gear, 52 Drive side external gear section, 54 Drive side outside Gear part, 100, 2100 Bottom wall member, 102, 114, 2014, 2114 Fitting hole part, 110, 2110, 3110 Peripheral wall member, 111, 1122 End part (other end part), 112, 2111 End part (one end part) , 116 inner peripheral surface, 120 screw member (fastening member), 130, 2102, fitting protrusion, 140 advance stopper surface portion (stopper surface) ), 150 retard stopper surface (stopper surface), 160 stopper projection

Claims (7)

A valve timing adjusting device for adjusting a valve timing of a valve that opens and closes a camshaft by transmission of engine torque from a crankshaft in an internal combustion engine,
A drive-side rotating body that exhibits a bottomed cylindrical shape and rotates in conjunction with the crankshaft by transmitting the engine torque through an annular torque transmission member spanned between the crankshaft,
A driven-side rotating body that is housed in the driving-side rotating body and rotates in conjunction with the camshaft;
A sun gear that rotates integrally with the drive-side rotor,
A planetary gear that changes a relative phase between the driving side rotating body and the driven side rotating body by performing planetary movement while meshing with the sun gear;
In the valve timing adjustment device provided with
The drive-side rotator includes a peripheral wall member that receives the driven-side rotator by coaxially fastening the sun gear, and a bottomed cylindrical shape together with the peripheral wall member that is coaxially fastened. And a bottom wall member on which the torque transmission member is hung,
One of the sun gear and the bottom wall member is fitted to the inner peripheral side of one end portion in the axial direction of the peripheral wall member, and the other of the sun gear and the bottom wall member is the other in the axial direction of the peripheral wall member. A valve timing adjusting device which is fitted to the outer peripheral side of the end portion.   One of the sun gear and the bottom wall member is fitted in the inner peripheral side of one axial end portion of the peripheral wall member in a press-fit state, and the other of the sun gear and the bottom wall member is an axis of the peripheral wall member The valve timing adjusting device according to claim 1, wherein the valve timing adjusting device is fitted to an outer peripheral side of the other end portion in the direction in a press-fitted state of the other end portion.   The drive-side rotator has a fastening member that fastens the peripheral wall member and the bottom wall member in the bottomed cylindrical shape, and the sun gear is fastened together with the peripheral wall member and the bottom wall member by the fastening member. The valve timing adjusting device according to claim 1, wherein the valve timing adjusting device is provided.   The valve timing adjusting device according to any one of claims 1 to 3, wherein the bottom wall member is a sprocket having a plurality of teeth with which the torque transmitting member is engaged.   The peripheral wall member has a stepped surface stopper surface portion on the inner peripheral surface that regulates a change in the relative phase by contacting the driven side rotating body in a rotation direction. The valve timing adjusting device according to any one of claims.   The valve timing adjusting device according to claim 1, wherein the peripheral wall member is formed in a straight cylindrical shape in the axial direction.   The valve timing adjusting device according to any one of claims 1 to 6, wherein the peripheral wall member and the bottom wall member are each formed by cutting a near net shape molded body.

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