JP6477078B2 - Valve timing adjustment device - Google Patents

Description

  The present invention relates to a valve timing adjusting device that adjusts the opening / closing timing of an intake valve or an exhaust valve of an engine.

  2. Description of the Related Art Conventionally, a valve timing adjusting device that adjusts the opening / closing timing of an intake valve or an exhaust valve by changing the phase of a camshaft with respect to an engine crankshaft is known. The valve timing adjusting device includes a housing that can rotate integrally with a crankshaft, and a vane rotor that is accommodated in the housing. The vane rotor is rotatably provided integrally with the camshaft, and divides the interior of the housing into an advance chamber and a retard chamber. In the valve timing adjusting device, the phase of the camshaft with respect to the crankshaft is changed by the difference between the pressure of the working fluid in the advance chamber and the pressure of the working fluid in the retard chamber. For this reason, the seal between the advance chamber and the retard chamber affects the responsiveness of the camshaft phase change with respect to the crankshaft. For example, Patent Document 1 describes a valve timing adjusting device including an L-shaped seal member provided between a vane rotor and a housing.

JP 2000-38909 A

  The L-shaped seal member provided in the valve timing adjusting device described in Patent Document 1 urges the abutting portion and the abutting portion that can abut on the radially inner wall and the axial inner wall of the housing. And an urging portion, which are integrally formed. However, the urging portion is made of resin like the contact portion, and there is a possibility that the urging force cannot be sufficiently generated in the housing where the temperature of the hydraulic oil exceeds 100 degrees. Further, if the urging portion is made of a material having high heat resistance, it is difficult to form the urging portion integrally with the abutting portion formed of resin, and therefore the abutting portion and the urging portion may be provided separately. . In this case, when the valve timing adjusting device is manufactured, the contact portion is easily detached from the vane rotor before being assembled to the housing, and the time required for assembling the housing and the vane rotor is increased.

  The present invention has been made in view of the above points, and provides a valve timing adjustment device that improves the response of the phase change of the driven shaft with respect to the drive shaft while shortening the time required to assemble the housing and the vane rotor. There is to do.

The present invention is a valve timing adjusting device that adjusts the opening / closing timing of an intake valve or an exhaust valve that is driven to open and close by changing the rotational phase of a drive shaft and a driven shaft of an engine. The valve timing adjusting device of the present invention has a cylindrical portion and two plate portions that close both ends of the cylindrical portion, where one of the drive shaft and the driven shaft is the first shaft and the other is the second shaft. A housing that can rotate with the first shaft about the rotation center, a vane rotor that is provided in the housing so as to be rotatable integrally with the first shaft, and that defines advancing chamber and retarding chamber in the housing, and between the housing and the vane rotor The abutting member that can be brought into contact with the inner wall of the cylinder part and one of the two plate parts, and that the abutting member comes into contact with the inner wall of the cylinder part and one of the two plate parts. A biasing member for biasing the contact member, a cylindrical sleeve provided in the vane rotor and having an advance port communicating with the advance chamber and a retard port communicating with the retard chamber; and Provided so that it can reciprocate in the axial direction within the sleeve. Provided that open spool advance port and the retard port.
In one aspect of the present invention, the radial direction biasing portion that biases the contact member so that the contact member contacts the inner wall of the cylindrical portion, and the contact member contacts the inner wall of one of the two plate portions. An urging member having an axial urging portion that urges the abutting member to contact is provided. The radial urging portion and the axial urging portion are integrally formed.
In another aspect of the present invention, the radial abutting portion that can abut against the inner wall of the cylindrical portion and the one end portion in the first axial direction of the radial abutting portion so as to protrude inward in the radial direction of the housing. An abutting member having an axial abutting portion that is provided and can abut against one of the inner walls of the two plate portions is provided. The radial contact portion and the axial contact portion are integrally formed.
In the valve timing adjusting device of the present invention, the urging member is formed of a heat-resistant material separately from the contact member, and has an engaging portion that can be engaged with the contact member.

  The contact member provided in the valve timing adjusting device of the present invention is provided so as to be able to contact either the inner wall of the cylindrical portion or the inner wall of one of the two plate portions. The abutting member is urged to abut against the inner wall of the housing by the urging member. The urging member formed separately from the contact member has an engaging portion that can be engaged with the contact member. Thereby, when the vane rotor provided with the contact member and the urging member is assembled to the housing at the time of manufacturing the valve timing adjusting device, the contact member and the urging member can be prevented from being separated. Therefore, the time required for assembling the housing and the vane rotor can be shortened. In addition, the biasing member made of heat-resistant material generates a biasing force even when the temperature in the housing rises, so it is possible to reliably prevent hydraulic fluid from leaking between the advance chamber and the retard chamber can do. Therefore, the response of the phase change of the driven shaft with respect to the drive shaft can be improved.

It is sectional drawing of the valve timing adjustment apparatus by 1st embodiment of this invention. 1 is a schematic diagram of an engine to which a valve timing adjusting device according to a first embodiment of the present invention is applied. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. It is a schematic diagram of the sealing member with which the valve timing adjustment apparatus by 1st embodiment of this invention is provided. It is a schematic diagram of the sealing member with which the valve timing adjustment apparatus by 2nd embodiment of this invention is provided. It is a schematic diagram of the sealing member with which the valve timing adjustment apparatus by 3rd embodiment of this invention is provided. It is a schematic diagram of the sealing member with which the valve timing adjustment apparatus by 4th embodiment of this invention is provided. It is a schematic diagram of the sealing member with which the valve timing adjustment apparatus by 5th embodiment of this invention is provided.

  Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
The valve timing adjusting device 1 according to the first embodiment of the present invention adjusts the opening / closing timing of the intake valve 3 of the engine 2 shown in FIG. As shown in FIG. 2, the rotation of the crankshaft 91 as the “drive shaft” of the engine 2 is transmitted to the camshafts 93 and 94 as “driven shafts” via the timing chain 92. The camshaft 93 drives the intake valve 3 to rotate, and the camshaft 94 drives the exhaust valve 4 to rotate.

  The configuration of the valve timing adjusting device 1 will be described with reference to FIGS. The valve timing adjusting device 1 includes a housing 10, a vane rotor 20, a seal member 40, a hydraulic control valve 30, and the like.

  The housing 10 includes a case 11 and a sprocket 12 as a “plate portion”. The case 11 and the sprocket 12 are arranged coaxially with the camshaft 93, and a plurality of locations in the circumferential direction are integrally fixed by bolts 13.

The case 11 is formed in a cup shape. The case 11 includes a cylindrical portion 111, a bottom portion 112 as a “plate portion”, and a plurality of protruding portions 113.
The cylinder part 111 is provided so that it may be located in the radial direction outer side of the vane rotor 20 mentioned later. The bottom portion 112 is provided to close one opening of the tube portion 111. As shown in FIG. 3, the plurality of projecting portions 113 are formed so as to project inward from the inner wall 114 of the cylindrical portion 111. The plurality of protrusions 113 are disposed so as to be separated from each other in the circumferential direction.
The sprocket 12 is provided to close the other opening of the case 11. The sprocket 12 has external teeth 121 on which the timing chain 92 is hung. As a result, the housing 10 can rotate integrally with the crankshaft 91 about the central axis CA93 of the camshaft 93 coaxial with the central axis of the cylindrical portion 111.

  The vane rotor 20 has a boss portion 21 and a plurality of vane portions 22. The vane rotor 20 is accommodated in the case 11.

  The boss portion 21 is a substantially cylindrical member that is fixed to the camshaft 93 via a sleeve 31 by a nut 25. The vane rotor 20 can rotate integrally with the camshaft 93.

  The vane part 22 is provided so as to protrude radially outward from the boss part 21. The vane portion 22 partitions the internal space of the housing 10, that is, the space between the adjacent protruding portions 113 into the advance chamber 23 and the retard chamber 24. The retard chamber 24 is positioned in the rotation direction with respect to the vane portion 22, and the advance chamber 23 is positioned in the reverse rotation direction with respect to the vane portion 22.

The vane rotor 20 includes an advance oil passage 27, a retard oil passage 28, and a supply oil passage 29. The advance oil passage 27 communicates with the advance chamber 23. The advance oil passage 27 opens in the inner wall surface of the boss portion 21. The retard oil passage 28 communicates with the retard chamber 24. The retard oil passage 28 is open to the inner wall surface of the boss portion 21. The supply oil passage 29 communicates with an oil pump 97 that is an external oil supply source via a supply oil passage 95 of the camshaft 93 and a supply oil passage 96 such as an engine block. The supply oil passage 29 opens on the inner wall surface of the boss portion 21.
When the vane rotor 20 receives the pressure of the hydraulic oil supplied to the advance chamber 23 or the retard chamber 24, the vane rotor 20 rotates relative to the housing 10 and changes the rotation phase with respect to the housing 10 to the advance side or the retard side.

  A seal member 26 is provided on the radially outer side of the portion where the vane portion 22 of the boss portion 21 is not formed. The seal member 26 is provided so as to be able to contact the inner wall of the protrusion 113. A seal member 40 is provided between the vane portion 22 and the case 11. The seal member 40 is provided so as to be able to contact the inner wall 114 of the cylindrical portion 111 and the inner wall 115 of the bottom portion 112 (see FIG. 4). The seal members 26 and 40 maintain a seal between the advance chamber 23 and the retard chamber 24 adjacent to each other. The configuration of the seal member 40 will be described later.

The hydraulic control valve 30 includes a sleeve 31 and a spool 32.
The sleeve 31 is formed in a cylindrical shape in the boss portion 21 of the vane rotor 20 so as to extend in the direction of the central axis CA93 of the camshaft 93. The sleeve 31 protrudes on the side opposite to the sprocket 12 with respect to the vane rotor 20. A screw 311 is formed on the outer wall of the portion of the sleeve 31 protruding from the vane rotor 20. A nut 25 is fastened to the screw 311 of the sleeve 31. The nut 25 sandwiches the washer 251, the vane rotor 20, and the washer 252 between the cam shaft 93 and fixes them. The sleeve 31 has an advance port 34 communicating with the advance oil passage 27, a retard port 35 communicating with the retard oil passage 28, and a supply port 36 communicating with the supply oil passage 29. doing. The sleeve 31 has a drain oil passage 33 that penetrates in the direction of the central axis CA93.

  The spool 32 is provided inside the sleeve 31 so as to be capable of reciprocating in the direction of the central axis CA93. In the hydraulic control valve 30, the ports of the sleeve 31 can be selectively connected according to the position of the spool 32 in the direction of the central axis CA93. Specifically, when the hydraulic fluid is supplied to the advance chamber 23 and discharged from the retard chamber 24, the spool 32 connects the supply port 36 and the advance port 34 while connecting the retard port 35. Is communicated with the outside through the inside of the spool 32. Further, when supplying the hydraulic oil to the retard chamber 24 and discharging the hydraulic oil from the advance chamber 23, the spool 32 connects the supply port 36 and the retard port 35 and connects the advance port 34 to the spool 32. Communicate to the outside through the outside.

  A stopper plate 37 is fitted inside the end of the spool 32 opposite to the camshaft 93. The spool 32 is urged toward the stopper plate 37 by a spring 38. The position of the spool 32 in the direction of the central axis CA93 is determined by the magnitude relationship between the urging force of the spring 38 and the pressing force by the linear solenoid 39 provided on the opposite side of the spool 32 with respect to the stopper plate 37.

  Next, the sealing member 40 which is the characteristic of 1st embodiment is demonstrated based on FIG.

  As shown in FIG. 3, the seal member 40 is provided between each of the plurality of vane portions 22 and the case 11. As shown in FIG. 4, the seal member 40 is accommodated in a groove 221 formed on the radially outer side of the vane portion 22 and the bottom 112 side of the vane portion 22. The seal member 40 includes a contact member 41 and a leaf spring 46 as an “urging member”. The contact member 41 and the leaf spring 46 are provided separately.

  As shown in FIGS. 4 and 5, the contact member 41 is formed in a substantially L shape. The contact member 41 includes a radial contact portion 42, an axial contact portion 43, and a support portion 44. The radial contact part 42, the axial contact part 43, and the support part 44 are integrally formed. In FIG. 5, the boundary between the radial contact portion 42 and the axial contact portion 43 is indicated by a two-dot chain line VL44 for easy understanding of the position of the support portion 44.

The radial contact portion 42 is a substantially rectangular parallelepiped portion. The radial contact portion 42 is provided substantially parallel to the central axis CA93. The outer wall 421 on the radially outer side of the radial contact portion 42 is formed so as to be able to contact the inner wall 114 of the cylindrical portion 111 of the case 11. The radial contact portion 42 is provided with a leaf spring 46 on the radially inner side.
The radial contact portion 42 is provided with an axial contact portion 43 and a support portion 44 at one end 422. The other end 423 is formed such that the radial length L423 is longer than the radial length L421 of the portion where the leaf spring 46 is provided radially inward. On the other end portion 423 on the side where the leaf spring 46 is provided, a convex portion 424 protruding in the direction of the central axis CA93 is provided.

The axial contact portion 43 is a substantially rectangular parallelepiped portion. The axial contact portion 43 is provided so as to extend in a direction substantially perpendicular to the central axis CA93. The outer wall 431 on one side of the axial contact portion 43 in the axial direction is formed so as to be able to contact the inner wall 115 of the bottom portion 112 of the case 11. The axial contact portion 43 is provided with a leaf spring 46 on the other side in the axial direction. The axial contact portion 43 is provided with a radial contact portion 42 and a support portion 44 at one end 432. . The other end 433 is formed such that the axial length L433 is longer than the axial length L431 of the portion where the leaf spring 46 is provided on the other axial side. On the side where the leaf spring 46 is provided on the other end portion 433, a convex portion 434 protruding in the radially outward direction is provided.

  The support portion 44 is provided on the radially inner side of one end portion 422 of the radial contact portion 42 and on the other side in the axial direction of one end portion 432 of the axial contact portion 43. The support portion 44 has a radial contact portion 42 and an axial direction so that the radial contact portion 42 and the axial contact portion 43 intersect at a substantially right angle so that the contact member 41 is provided along the outer wall of the vane portion 22. The contact portion 43 is supported.

  As shown in FIGS. 4 and 5, the leaf spring 46 is formed in a substantially L shape. The leaf spring 46 is made of a material having elasticity and high heat resistance, such as a metal. The leaf spring 46 includes a radial spring portion 47 as a “radial biasing portion”, an axial spring portion 48 as an “axial biasing portion”, and a connection portion 49. The radial direction spring part 47, the axial direction spring part 48, and the connection part 49 are integrally formed.

The radial spring portion 47 is a portion provided between the radial contact portion 42 and the vane portion 22. The radial spring portion 47 is provided so that the longitudinal direction and the axial direction are substantially parallel. As shown in FIG. 4, the radial spring portion 47 is formed to be recessed in the radial inner direction. The radial spring portion 47 has a central portion that abuts against an inner wall that forms the groove 221, and both ends that abut against the abutting member 41. In this state, the radial spring portion 47 biases the radial contact portion 42 in the radially outward direction.
The radial spring portion 47 is provided with a connecting portion 49 at one end 471. The other end portion 472 is provided with a concave portion 473 as an “engaging portion” that can be engaged with the convex portion 424 of the radial contact portion 42.

The axial spring portion 48 is a portion provided between the axial contact portion 43 and the vane portion 22. The axial spring portion 48 is provided so that the longitudinal direction and the radial direction are substantially parallel. As shown in FIG. 4, the axial spring portion 48 is formed so as to be recessed on the other side in the axial direction. As for the axial direction spring part 48, the center part contact | abuts to the inner wall which forms the groove | channel 221, and both ends are contact | abutted to the contact member 41. FIG. In this state, the axial spring portion 48 urges the axial contact portion 43 to one side in the axial direction.
The axial spring part 48 is provided with a connection part 49 at one end part 481. The other end 482 is provided with a concave portion 483 as an “engaging portion” that can be engaged with the convex portion 434 of the axial contact portion 43.

  The connection portion 49 is a portion that connects one end portion 471 of the radial spring portion 47 and one end portion 481 of the axial spring portion 48. The connecting portion 49 has a contact surface 491 that forms an angle of approximately 45 degrees with respect to the central axis CA93. The contact surface 491 is a “connection” of the support portion 44 formed so as to connect the inner wall 425 on the radially inner side of the radial contact portion 42 and the inner wall 435 on the other axial side of the axial contact portion 43. It abuts against the inner wall 441 as a “surface”.

In the valve timing adjusting device 1, when the rotational phase is on the retard side with respect to the target value, the supply oil passage 29 and the advance chamber 23 are connected by the hydraulic control valve 30, and the retard chamber 24 is an external drain space. Connected. As a result, the hydraulic oil is discharged from the retard chamber 24 while the hydraulic oil is supplied to the advance chamber 23, and the vane rotor 20 rotates relative to the housing 10 toward the advance side.
When the rotational phase is on the advance side with respect to the target value, the advance chamber 23 is connected to the external drain space while the supply oil passage 29 and the retard chamber 24 are connected by the hydraulic control valve 30. Accordingly, the hydraulic oil is discharged from the advance chamber 23 while the hydraulic oil is supplied to the retard chamber 24, and the vane rotor 20 rotates relative to the housing 10 toward the retard side.
When the rotational phase matches the target value, the advance chamber 23 and the retard chamber 24 are closed by the hydraulic control valve 30. As a result, the rotational phase is maintained.

  (A) The valve timing adjusting device 1 according to the first embodiment includes a seal member 40 between the vane portion 22 and the case 11. The seal member 40 includes a contact member 41 that can simultaneously contact the inner wall 114 of the cylindrical portion 111 of the case 11 and the inner wall 115 of the bottom portion 112. The contact member 41 is simultaneously urged by the leaf spring 46 in the radial direction and the axial direction of the vane rotor 20. Thereby, the seal between the advance chamber 23 and the retard chamber 24 on one side of the vane rotor 20 in the radial direction and the axial direction is reliably maintained, and the advance chamber 23 to the retard chamber 24 or the retard angle is maintained. It is possible to prevent leakage of hydraulic oil from the chamber 24 to the advance chamber 23. Therefore, the responsiveness of the phase change of the camshaft 93 with respect to the crankshaft 91 in the valve timing adjusting device 1 can be improved.

  (B) The leaf spring 46 is made of a heat resistant material. As a result, the leaf spring 46 can urge the contact member 41 so as to reliably contact the inner walls 114 and 115 of the case 11 even in the housing 10 exceeding 100 degrees in actual use. Therefore, the seal between the advance chamber 23 and the retard chamber 24 can be reliably maintained, and the responsiveness of the phase change in the valve timing adjusting device 1 can be improved.

  (C) The leaf spring 46 has concave portions 473 and 483 that can be engaged with the convex portions 424 and 434 of the contact member 41. Thereby, when the vane rotor 20 is assembled | attached to the case 11, it can prevent that the contact member 41 and the leaf | plate spring 46 fall apart. Therefore, the time required for assembling the vane rotor 20 and the case 11 can be shortened.

  (D) In the valve timing adjusting device 1, the abutting member 41 is urged in two directions of the radial direction and the axial direction by one leaf spring 46. Thereby, the number of parts constituting the valve timing adjusting device 1 can be reduced.

  (E) The contact surface 491 of the connection portion 49 of the leaf spring 46 is in contact with the inner wall 441 of the support portion 44 of the contact member 41. Accordingly, the contact area between the contact member 41 and the leaf spring 46 can be reduced while the contact member 41 is reliably brought into contact with the inner walls 414 and 415 of the case 11. Therefore, wear of the contact member 41 and the leaf spring 46 can be reduced.

(Second embodiment)
Next, a valve timing adjusting device according to a second embodiment of the present invention will be described with reference to FIG. The second embodiment differs from the first embodiment in the shape of the contact member. In addition, the same code | symbol is attached | subjected to the site | part substantially the same as 1st embodiment, and description is abbreviate | omitted.

  FIG. 6 shows a seal member 50 provided in the valve timing adjusting device according to the second embodiment. The seal member 50 includes a contact member 51 and a leaf spring 46. The contact member 51 and the leaf spring 46 are provided separately.

  As shown in FIG. 6, the contact member 51 is formed in a substantially L shape. The contact member 51 includes a radial contact portion 42, an axial contact portion 43, and a support portion 54. The radial contact part 42, the axial contact part 43, and the support part 54 are integrally formed. In FIG. 6, the boundary between the radial contact portion 42 and the axial contact portion 43 is indicated by a two-dot chain line VL <b> 54 for easy understanding of the position of the support portion 54.

  The support portion 54 is provided on the radially inner side of one end portion 422 of the radial contact portion 42 and on the other side in the axial direction of one end portion 432 of the axial contact portion 43. The support portion 54 has a radial contact portion 42 and an axial direction so that the radial contact portion 42 and the axial contact portion 43 intersect at a substantially right angle so that the contact member 41 is provided along the outer wall of the vane portion 22. The contact portion 43 is supported. The support portion 54 has an inner wall 541 as a “connection surface” that forms an angle of approximately 45 degrees with respect to the central axis CA93. The inner wall 541 is formed so as to connect the inner wall 425 and the inner wall 435. The contact surface 491 of the connection portion 49 is in contact with the inner wall 541.

  The support portion 54 has a recess 542 that can accommodate the connection portion 49 of the leaf spring 46. The recess 542 is formed so that the inner wall 541 is the bottom surface. Specifically, as shown in FIG. 6B, the support portion 54 includes a side wall 543 that connects one side wall 426 of the radial contact portion 42 and one side wall 436 of the axial contact portion 43. In addition, a side wall 544 that connects the other side wall 427 of the radial contact part 42 and the other side wall 437 of the axial direction contact part 43 is provided. That is, the recess 542 is a space formed by the side walls 543 and 544 and the inner walls 425 and 435 with the inner wall 541 as a bottom surface.

  In the second embodiment, the connection portion 49 of the leaf spring 46 is accommodated in the recess 542. Accordingly, it is possible to prevent the leaf spring 46 from being shifted to the side walls 426 and 436 or the side walls 427 and 437 of the contact member 51 and coming off from the contact member 51. Therefore, the second embodiment has the effects (a) to (e) of the first embodiment, and can further prevent the contact member 51 and the leaf spring 46 from being separated.

(Third embodiment)
Next, a valve timing adjusting device according to a third embodiment of the present invention will be described with reference to FIG. The third embodiment is different from the first embodiment in the shape of the contact member. In addition, the same code | symbol is attached | subjected to the site | part substantially the same as 1st embodiment, and description is abbreviate | omitted.

FIG. 7 shows a seal member 60 provided in the valve timing adjusting device according to the third embodiment.
The seal member 60 includes a contact member 61 and a leaf spring 46. The contact member 61 and the leaf spring 46 are provided separately.

  As shown in FIG. 7, the contact member 61 is formed in a substantially L shape. The contact member 61 includes a radial contact portion 62, an axial contact portion 63, and a support portion 44. The radial contact portion 62, the axial contact portion 63, and the support portion 44 are integrally formed. In FIG. 7, the boundary between the radial contact portion 62 and the axial contact portion 63 is indicated by a two-dot chain line VL44 for easy understanding of the position of the support portion 44.

The radial contact portion 62 is provided substantially parallel to the central axis CA93. The outer wall 621 on the radially outer side of the radial contact portion 62 is formed so as to be able to contact the inner wall 114 of the cylindrical portion 111. The radial contact portion 62 is provided with an axial contact portion 63 and a support portion 44 at one end 622. The other end 623 is provided with a convex portion 624 that protrudes in the direction of the central axis CA93 and can be engaged with the concave portion 473 on the side where the radial spring portion 47 is provided.
The radial contact portion 62 is formed so as to extend radially inward from one side wall 626 of the radial contact portion 62 and radially inward from the other side wall 627 of the radial contact portion 62. A side wall 629 is formed to extend. The radial contact portion 62 has a groove 620 that is formed from a radially inner wall 625 and side walls 628 and 629 and can accommodate the radial spring portion 47.

The axial contact portion 63 is provided so as to extend in a direction that intersects the central axis CA93 substantially perpendicularly. The outer wall 631 on one side in the axial direction of the axial contact portion 63 is formed so as to be able to contact the inner wall 115 of the bottom portion 112. The axial contact portion 63 is provided with a radial contact portion 62 and a support portion 44 at one end 632. The other end portion 633 is provided with a convex portion 634 that protrudes radially outward and engages with the concave portion 483 on the side where the axial spring portion 48 is provided.
The axial contact portion 63 includes a side wall 638 formed so as to extend from one side wall 636 of the axial contact portion 63 to the other side in the axial direction, and a shaft from the other side wall 637 of the axial contact portion 63. It has a connecting side wall 639 formed to extend to the other side of the direction. The axial contact portion 63 has an inner wall 635 on the other side in the axial direction and a groove 630 that is formed from the side walls 638 and 639 and can accommodate the axial spring portion 48.

  In the third embodiment, the radial spring portion 47 is accommodated in the groove 620. Further, the axial spring portion 48 is accommodated in the groove 630. As a result, the leaf spring 46 can be prevented from shifting to the side wall 626, 636 side or the side wall 627, 637 side of the contact member 61 and coming off from the contact member 61. Therefore, the third embodiment has the effects (a) to (e) of the first embodiment, and can further prevent the contact member 61 and the leaf spring 46 from being separated.

(Fourth embodiment)
Next, a valve timing adjusting device according to a fourth embodiment of the present invention will be described with reference to FIG. The fourth embodiment is different from the first embodiment in the shape of the contact member. In addition, the same code | symbol is attached | subjected to the site | part substantially the same as 1st embodiment, and description is abbreviate | omitted.

  FIG. 8 shows a seal member 70 provided in the valve timing adjusting device according to the fourth embodiment. The seal member 70 includes a contact member 71 and a leaf spring 46. The contact member 71 and the leaf spring 46 are provided separately.

  As shown in FIG. 8, the contact member 71 is formed in a substantially L shape. The contact member 71 includes a radial contact portion 72, an axial contact portion 73, and a support portion 74. The radial contact part 72, the axial contact part 73, and the support part 74 are integrally formed. In FIG. 8, the boundary between the radial contact portion 72 and the axial contact portion 73 is indicated by a two-dot chain line VL74 in order to make the position of the support portion 74 easier to understand.

The radial contact portion 72 is provided substantially parallel to the central axis CA93. The outer wall 721 on the radially outer side of the radial contact portion 72 is formed so as to be able to contact the inner wall 114 of the cylindrical portion 111. The radial contact portion 72 is provided with an axial contact portion 73 and a support portion 74 at one end 722. The other end portion 723 is provided with a convex portion 724 that protrudes in the direction of the central axis CA93 on the side where the radial spring portion 47 is provided.
The radial contact portion 72 includes a side wall 728 formed to extend radially inward from one side wall 726 and a side wall 729 formed to extend radially inward from the other side wall 727. The radial contact portion 72 includes a groove 720 that is formed from the radially inner wall 725 and the side walls 728 and 729 and can accommodate the radial spring portion 47.

The axial contact portion 73 is provided so as to extend in a direction that intersects the central axis CA93 substantially perpendicularly. The outer wall 731 on one side in the axial direction of the axial contact portion 73 is formed so as to be able to contact the inner wall 115 of the bottom portion 112. The axial contact portion 73 is provided with a radial contact portion 72 and a support portion 74 at one end 732. The other end portion 733 is provided with a convex portion 734 protruding outward in the radial direction on the side where the axial spring portion 48 is provided.
The axial contact portion 73 includes a side wall 738 formed to extend from one side wall 736 of the axial contact portion 73 to the other side in the axial direction, and a shaft from the other side wall 737 of the axial contact portion 73. It has a side wall 739 formed to extend to the other side of the direction. The axial contact portion 73 has an inner wall 735 on the other side in the axial direction and a groove 730 that is formed from the side walls 738 and 739 and can accommodate the axial spring portion 48.

  The support portion 74 is provided on the radially inner side of one end portion 722 of the radial contact portion 72 and on the other axial side of one end portion 732 of the axial contact portion 73. The support portion 74 has an inner wall 741 as a “connection surface” that forms an angle of approximately 45 degrees with respect to the central axis CA93. The inner wall 741 is formed to connect the inner wall 725 and the inner wall 735. A contact surface 491 of the connection portion 49 is in contact with the inner wall 741.

  The support portion 74 has a recess 742 that can accommodate the connection portion 49 of the leaf spring 46. The recess 742 is formed with the inner wall 741 as the bottom surface. Specifically, as shown in FIG. 8B, the support portion 74 includes a side wall 743 that connects one side wall 726 of the radial contact portion 72 and one side wall 736 of the axial contact portion 73. In addition, a side wall 744 connecting the other side wall 727 of the radial contact part 72 and the other side wall 737 of the axial direction contact part 43 is provided. The recess 742 is a space formed by the side walls 743 and 744 and the inner walls 725 and 735 with the inner wall 741 as a bottom surface, and communicates with the grooves 720 and 730, respectively.

  In the fourth embodiment, the leaf spring 46 is accommodated in the grooves 720 and 730 and the recess 742. Accordingly, it is possible to prevent the leaf spring 46 from being shifted to the side wall 726, 736 side or the side wall 727, 737 side of the contact member 71 and coming off from the contact member 71. Therefore, the fourth embodiment has the effects (a) to (e) of the first embodiment, and can further prevent the contact member 71 and the leaf spring 46 from being separated.

(Fifth embodiment)
Next, a valve timing adjusting apparatus according to a fifth embodiment of the present invention will be described with reference to FIG. The fifth embodiment is different from the first embodiment in the shape of the leaf spring. In addition, the same code | symbol is attached | subjected to the site | part substantially the same as 1st embodiment, and description is abbreviate | omitted.

  FIG. 9 shows a seal member 80 provided in the valve timing adjusting device according to the fifth embodiment. The seal member 80 includes a contact member 41 and a leaf spring 86 as an “urging member”. The contact member 41 and the leaf spring 86 are provided separately.

  As shown in FIG. 9, the leaf spring 86 is formed in a substantially L shape. The leaf spring 86 is made of a material having elasticity and high heat resistance, for example, a metal. The leaf spring 86 includes a radial spring portion 87 as a “radial biasing portion” and an axial spring portion 88 as an “axial biasing portion”. The radial spring portion 87 and the axial spring portion 88 are integrally formed.

  As shown in FIG. 9, the radial spring portion 87 is formed to be recessed in the radially outward direction. The radial spring portion 87 is in contact with the inner wall 425 of the radial contact portion 42 at the center portion, and is in contact with the inner wall forming the groove 221 at both ends. The radial spring portion 87 is provided with an axial spring portion 88 at one end portion 871. The other end portion 872 is provided with a concave portion 873 as an “engaging portion” that can be fitted to the convex portion 424 of the radial contact portion 42.

  As shown in FIG. 9, the axial spring portion 88 is formed to be recessed on one side in the axial direction. The central portion of the axial spring portion 88 is in contact with the inner wall 435 of the axial contact portion 43, and both ends are in contact with the inner wall forming the groove 221. The axial spring portion 88 is provided with a radial spring portion 87 at one end 881. The other end portion 882 is provided with a concave portion 883 as an “engaging portion” that can be fitted to the convex portion 434 of the axial contact portion 43.

  In the fifth embodiment, the radial spring portion 87 that urges the radial contact portion 42 has a central portion that contacts the inner wall 425 of the radial contact portion 42, and both ends that contact the inner wall that forms the groove 221. ing. The axial spring portion 88 that biases the axial contact portion 43 has a central portion that is in contact with the inner wall 435 of the axial contact portion 43 and both ends that are in contact with the inner wall forming the groove 221. Accordingly, the leaf spring 86 can simultaneously urge the contact member 41 in two directions, ie, the radial direction and the axial direction. Therefore, the fifth embodiment has the effects (a) to (d) of the first embodiment.

(Other embodiments)
(A) In the above-described embodiment, the contact member and the urging member included in the valve timing adjusting device according to the present invention are provided between the vane portion and the case. However, an abutting member and an urging member included in the valve timing adjusting device according to the present invention may be provided between the boss portion and the case.

  (A) In the above-described embodiment, the contact member has a support portion that supports the radial contact portion and the axial contact portion. However, the support portion may not be provided.

  (C) In the first to fourth embodiments, the leaf spring has a connecting portion that connects the radial spring portion and the axial spring portion. Further, the inner wall of the connection portion is in contact with the inner wall of the support portion of the contact member. However, the leaf spring may not have a connection portion. Moreover, even if it has a connection part, it does not need to be in contact with the inner wall of the contact member.

  (D) In the above-described embodiment, the leaf spring has a recess as the “engagement portion”. However, the shape of the “engagement portion” is not limited to this. For example, the contact member may have a concave portion and may have a convex portion that can be engaged with the concave portion. The “engagement portion” may be provided so as to be engageable with the contact member and to restrict the relative movement of the leaf spring with respect to the contact member.

  (E) In the above-described embodiment, the leaf spring as the “biasing member” is made of metal. However, the material forming the “biasing member” is not limited to this. It may be formed from heat-resistant and elastic resin, rubber or the like.

  As mentioned above, this invention is not limited to such embodiment, It can implement with a various form in the range which does not deviate from the summary.

DESCRIPTION OF SYMBOLS 1 ... Valve timing adjusting device 10 ... Housing 111 ... Tube part 112 ... Bottom part (plate part)
12 ... Sprocket (plate part)
DESCRIPTION OF SYMBOLS 20 ... Vane rotor 31 ... Sleeve 32 ... Spool 34 ... Advance angle chamber 35 ... Delay angle chamber 41, 51, 61, 71 ... Contact member 46, 86 ... Leaf spring (Biasing member)
473, 483, 873, 883 ... convex portion (engagement portion)

Claims (6)

Valve timing for changing the rotational phase of the drive shaft (91) and driven shaft (93) of the engine (2) and adjusting the opening / closing timing of the intake valve (3) or the exhaust valve (4) driven by the driven shaft. An adjustment device (1),
When one of the drive shaft and the driven shaft is a first axis and the other is a second axis,
A housing (10) having a cylindrical portion (111) and two plate portions (12, 112) for closing both ends of the cylindrical portion, and being rotatable with the first axis about the central axis of the cylindrical portion. When,
A vane rotor (20) provided in the housing so as to be rotatable integrally with the first shaft and defining the advance chamber (23) and the retard chamber (24) in the housing;
Abutting members (41, 51, 61, provided between the housing and the vane rotor and capable of abutting against the inner wall (114) of the cylindrical portion and the inner wall (115) of one of the two plate portions. 71)
The contact member is formed of a heat-resistant material separately from the contact member, and has an engagement portion (473, 483, 873, 883) that can be engaged with the contact member. A radial direction in which the abutting member is urged to abut against an inner wall and one of the two plate portions, and the abutting member is urged to abut against the inner wall of the cylindrical portion. An urging portion (47, 87) and an axial urging portion (48, 88) for urging the abutting member so that the abutting member abuts on an inner wall of one of the two plate portions. a chromatic biasing member (46,86),
A cylindrical sleeve provided in the vane rotor and having an advance port (34) communicating with the advance chamber and a retard port (35) communicating with the retard chamber ( 31) and
A spool (32) provided so as to be reciprocally movable in the axial direction within the sleeve and capable of opening and closing the advance port and the retard port;
Equipped with a,
It said radial biasing portion and said axial biasing unit, a valve timing control apparatus according to claim Rukoto integrally formed. The contact member includes a radial contact portion (42, 62, 72) capable of contacting the inner wall of the cylindrical portion, and one end portion (422) of the radial contact portion in the first axial direction. , 622, 722) and an axial contact portion (43, 63, 73) provided so as to protrude radially inward of the housing and capable of contacting the inner wall of one of the two plates.
The valve timing adjusting device according to claim 1, wherein the radial contact portion and the axial contact portion are integrally formed. Valve timing for changing the rotational phase of the drive shaft (91) and driven shaft (93) of the engine (2) and adjusting the opening / closing timing of the intake valve (3) or the exhaust valve (4) driven by the driven shaft. An adjustment device (1),
When one of the drive shaft and the driven shaft is a first axis and the other is a second axis,
A housing (10) having a cylindrical portion (111) and two plate portions (12, 112) for closing both ends of the cylindrical portion, and being rotatable with the first axis about the central axis of the cylindrical portion. When,
A vane rotor (20) provided in the housing so as to be rotatable integrally with the first shaft and defining the advance chamber (23) and the retard chamber (24) in the housing;
A radial contact portion (42, 62, 72) provided between the housing and the vane rotor and capable of contacting the inner wall (114) of the cylindrical portion, and the first of the radial contact portion Axial contact that is provided so as to protrude radially inward of the housing from one end (422, 622, 722) in the axial direction and is capable of contacting either one of the inner walls (115) of the two plates. Contact members (41, 51, 61, 71) having portions (43, 63, 73);
The contact member is formed of a heat-resistant material separately from the contact member, and has an engagement portion (473, 483, 873, 883) that can be engaged with the contact member. An urging member (46, 86) for urging the abutting member to abut against an inner wall and one of the two plate portions;
A cylindrical sleeve provided in the vane rotor and having an advance port (34) communicating with the advance chamber and a retard port (35) communicating with the retard chamber ( 31) and
A spool (32) provided so as to be reciprocally movable in the axial direction within the sleeve and capable of opening and closing the advance port and the retard port;
Equipped with a,
It said radial abutment portion and the axial abutment, the valve timing control apparatus according to claim Rukoto integrally formed. The radial biasing portion that biases the radial contact portion so as to contact the inner wall of the cylindrical portion is formed to be recessed inward in the radial direction of the housing,
The axial urging portion that urges the axial contact portion to contact one of the inner walls of the two plate portions is formed to be recessed on either side of the two plate portions,
The connecting portion (49) provided between the radial urging portion and the axial urging portion includes an inner wall (425, 625, 725) of the radial contact portion and an inner wall of the axial contact portion. 4. The valve timing adjusting device according to claim 2 , wherein the valve timing adjusting device abuts on a connection surface (441, 541, 741) for connecting (435, 635, 735).   The valve timing adjusting device according to claim 4, wherein the contact member has a recess (542, 742) capable of accommodating the connection portion. The abutting member includes a radial urging portion that urges the radial abutting portion to abut against the inner wall of the cylindrical portion, and the axial abutting portion on one inner wall of the two plate portions. 6. The valve timing according to claim 2, further comprising a groove (620, 630, 720, 730) capable of accommodating at least one of the axial urging portions that urge to abut. Adjustment device.

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