JP7136455B2 - FLUID CONTROL VALVE AND VALVE TIMING ADJUSTMENT USING THE SAME - Google Patents

Description

The present invention relates to a fluid control valve and a valve timing adjusting device using the same.

2. Description of the Related Art Conventionally, a fluid control valve is known which includes a check valve having a tubular valve body formed by winding a single plate material. For example, in the fluid control valve of Patent Document 1, a cylindrical valve seat surface is formed on the inner wall of the sleeve. The sleeve is formed with a channel portion that communicates between the outside of the sleeve and the valve seat surface. A check valve is opened by reducing the diameter of the outer peripheral wall of the valve body away from the valve seat surface, and closed by increasing the diameter of the outer peripheral wall of the valve body to contact the valve seat surface.

U.S. Pat. No. 9,422,840

In the fluid control valve of Patent Document 1, the check valve is provided inside the sleeve so as to be rotatable in the circumferential direction. Therefore, in the circumferential direction of the sleeve, the deformed shape of the valve body when the valve is opened and closed may change depending on the position of one end or the other end of the valve body in the circumferential direction with respect to the flow passage. This may destabilize the performance of the fluid control valve.

An object of the present invention is to provide a fluid control valve with stable performance and a valve timing adjusting device using the same.

The present invention is a fluid control valve (11) capable of controlling the flow of fluid supplied from a fluid supply source (OS) to fluid supply targets (201, 202), comprising a sleeve (50) and a valve seat surface (56). , flow passages (ORs, OAs), a spool (60), check valves (71, 72), and a rotation restrictor (95). The sleeve is cylindrically formed. The valve seat surface is cylindrically formed on the inner wall of the sleeve. The flow path communicates the outside of the sleeve with the valve seat surface so that the fluid can flow between the fluid supply source and the fluid supply target. The spool is axially movably provided within the sleeve and is capable of controlling fluid flow between the fluid supply source and the fluid supply target according to its axial position relative to the sleeve.

The check valve has a valve body (700) formed in a tubular shape and having an outer peripheral wall provided so as to be able to abut on the valve seat surface, and a locking portion (91) formed on the outer peripheral wall of the valve body, The valve is opened by reducing the diameter of the outer peripheral wall of the valve body away from the valve seat surface, and closed by increasing the diameter of the outer peripheral wall of the valve body to contact the valve seat surface. The rotation restricting portion is formed on the valve seat surface, and can restrict rotation of the check valve with respect to the sleeve by engaging the engaging portion.

In the present invention, rotation of the check valve with respect to the sleeve can be regulated by the rotation regulating portion. Therefore, in the circumferential direction of the sleeve, it is possible to suppress a change in the position of one end or the other end of the valve body in the circumferential direction with respect to the flow path portion. As a result, it is possible to suppress a change in the deformed shape of the valve body when the valve body is opened and closed. Therefore, the performance of the fluid control valve can be stabilized.

FIG. 2 is a cross-sectional view showing the valve timing adjusting device according to the first embodiment; II-II line sectional view of FIG. FIG. 2 is a cross-sectional view showing the fluid control valve of the valve timing adjusting device according to the first embodiment; FIG. 4 is a sectional view taken along line IV-IV of FIG. 3, showing only the sleeve and the check valve; FIG. 2 is a cross-sectional view showing the rotation restricting portion of the fluid control valve according to the first embodiment and its vicinity; FIG. 4 is a front view showing the check valve of the fluid control valve according to the first embodiment; 4 is a perspective view showing the check valve of the fluid control valve according to the first embodiment; FIG. (A) is a developed view of the check valve of the fluid control valve according to the first embodiment, and (B) is a view of (A) viewed from the direction of arrow VIIIB. The figure which shows the relationship between the opening area of the flow path part which opens toward the outer peripheral wall of a check valve, and the displacement of a check valve. Sectional drawing which shows the sleeve and check valve of the fluid control valve by 2nd Embodiment. Sectional drawing which shows the sleeve and check valve of the fluid control valve by 3rd Embodiment. (A) is an exploded view of a check valve of a fluid control valve according to a fourth embodiment, and (B) is a view of (A) viewed from the direction of arrow XIIB, in which locking portions are formed. (A) is an exploded view of a check valve of a fluid control valve according to a fifth embodiment, and (B) is a view of (A) viewed from the direction of arrow XIIIB.

Hereinafter, fluid control valves and valve timing adjusting devices according to multiple embodiments will be described with reference to the drawings. In addition, the same code|symbol is attached|subjected to the substantially same structural part in several embodiment, and description is abbreviate|omitted. In addition, substantially the same components in multiple embodiments have the same or similar effects.

(First embodiment)
1 and 2 show a fluid control valve according to a first embodiment and a valve timing adjusting device to which it is applied. A valve timing adjusting device 10 changes the rotation phase of a camshaft 3 with respect to a crankshaft 2 of an engine 1 as an internal combustion engine, thereby adjusting the intake valve 4 or the exhaust valve 4 driven by the camshaft 3 to open and close. It adjusts the valve timing. A valve timing adjusting device 10 is provided in a power transmission path from the crankshaft 2 to the camshaft 3 . The crankshaft 2 corresponds to the "drive shaft". The camshaft 3 corresponds to a "driven shaft". The intake valve 4 and the exhaust valve 5 correspond to "valves".

The configuration of the valve timing adjusting device 10 will be described with reference to FIGS. The valve timing adjustment device 10 includes a phase changer PC, a hydraulic oil supply source OS as a fluid supply source, a hydraulic oil control unit OC, an oil discharge unit OD, a retard supply oil passage RRs, an advance supply oil passage RAs, and drain oil. A retarded drain oil passage RRd and an advanced drain oil passage RAd are provided as passages.

The phase conversion unit PC has a housing 20 and vane rotors 30 . The housing 20 has a gear portion 21 and a case 22 . The case 22 has a tubular portion 221 and plate portions 222 and 223 . The tubular portion 221 is formed in a tubular shape. The plate portion 222 is formed integrally with the tubular portion 221 so as to block one end of the tubular portion 221 . The plate portion 223 is provided so as to close the other end of the tubular portion 221 . Thereby, a space 200 is formed inside the housing 20 . The plate portion 223 is fixed to the cylindrical portion 221 with bolts 12 . The gear portion 21 is formed on the outer edge portion of the plate portion 223 .

The plate portion 223 is fitted to the end portion of the cam shaft 3 . Camshaft 3 rotatably supports housing 20 . A chain 6 is wound around the gear portion 21 and the crankshaft 2 . The gear portion 21 rotates in conjunction with the crankshaft 2 . The case 22 forms a plurality of partition walls 23 projecting radially inward from the cylindrical portion 221 . An opening 24 that opens to the space outside the case 22 is formed in the center of the plate portion 222 of the case 22 . The opening 24 is located on the side opposite to the camshaft 3 with respect to the vane rotor 30 .

The vane rotor 30 has a boss 31 and a plurality of vanes 32 . The boss 31 has a cylindrical shape and is fixed to the end of the camshaft 3 . The vanes 32 protrude radially outward from the bosses 31 between the partition walls 23 . A space 200 inside the housing 20 is partitioned by the vane 32 into a retard chamber 201 and an advance chamber 202 . That is, the housing 20 forms a retard chamber 201 and an advance chamber 202 with the vane rotor 30 . The retard chamber 201 is located on one side of the vane 32 in the circumferential direction. The advance chamber 202 is located on the other side of the vane 32 in the circumferential direction. The vane rotor 30 rotates relative to the housing 20 in the retarded angle direction or the advanced angle direction according to the hydraulic pressure of hydraulic oil as a fluid supplied to the retarded angle chamber 201 and the advanced angle chamber 202 . Here, the retard chamber 201 and the advance chamber 202 correspond to "hydraulic chambers" to which fluid is supplied.

In this embodiment, the hydraulic oil control valve 11 as a fluid control valve corresponds to the hydraulic oil control section OC. The hydraulic oil control valve 11 includes a sleeve 400, a valve seat surface 56 as a valve seat surface, a retard supply opening ORs as a flow path, an advance supply opening OAs as a flow path, a spool 60, and a recycling oil path. Rre, a retard supply check valve 71 as a check valve, an advance supply check valve 72 as a check valve, a recycle check valve 81, a rotation regulating portion 95, and the like.

In this embodiment, the hydraulic fluid control valve 11 is provided in the central portion of the housing 20 and the vane rotor 30, that is, the phase conversion portion PC (see FIGS. 1 and 2). Hydraulic oil control valve 11 is provided so that at least a portion thereof is positioned inside housing 20 . In addition, the hydraulic oil control valve 11 is positioned on the rotation shaft of the phase changer PC.

The sleeve 400 has an outer sleeve 40 as an outer tubular portion and an inner sleeve 50 as an inner tubular portion. The outer sleeve 40 is formed in a substantially cylindrical shape from a material with relatively high hardness including iron, for example. The inner peripheral wall of the outer sleeve 40 is formed in a substantially cylindrical shape. As shown in FIG. 3 , a threaded portion 41 is formed on the outer peripheral wall of one end of the outer sleeve 40 . A locking portion 49 annularly extending radially outward from the outer peripheral wall is formed on the other end side of the outer sleeve 40 .

A shaft hole portion 100 and a supply hole portion 101 are formed at the end portion of the camshaft 3 on the valve timing adjusting device 10 side. The shaft hole portion 100 is formed so as to extend in the axial direction of the camshaft 3 from the center of the end face of the camshaft 3 on the valve timing adjusting device 10 side. The supply hole portion 101 is formed so as to extend radially inward from the outer wall of the camshaft 3 and communicate with the shaft hole portion 100 (see FIG. 1).

A shaft-side threaded portion 110 that can be threadedly coupled to the threaded portion 41 of the outer sleeve 40 is formed on the inner wall of the shaft hole portion 100 of the cam shaft 3 . The outer sleeve 40 passes through the inside of the boss 31 of the vane rotor 30 and is fixed to the camshaft 3 such that the threaded portion 41 is coupled to the shaft-side threaded portion 110 of the camshaft 3 . At this time, the locking portion 49 locks the end surface of the boss 31 of the vane rotor 30 on the side opposite to the camshaft 3 . As a result, the vane rotor 30 is fixed to the camshaft 3 so as to be sandwiched between the camshaft 3 and the engaging portion 49 . Thus, the outer sleeve 40 is provided in the central portion of the vane rotor 30 .

In this embodiment, the hydraulic oil supply source OS is the oil pump 8 . Also, the oil drain OD is the oil pan 7 . The oil pump 8 is connected to the supply hole portion 101 . The oil pump 8 pumps up hydraulic oil stored in the oil pan 7 and supplies it to the supply hole portion 101 . As a result, hydraulic oil flows into the shaft hole portion 100 .

The inner sleeve 50 is made of a material with relatively low hardness, such as aluminum, and has a substantially cylindrical shape. In other words, the inner sleeve 50 is made of a material with lower hardness than the outer sleeve 40 . The inner sleeve 50 has an inner peripheral wall and an outer peripheral wall formed in a substantially cylindrical shape. The surface of the inner sleeve 50 is subjected to a surface hardening treatment such as alumite, and has a surface layer with a higher hardness than the base material.

As shown in FIG. 3 , the inner sleeve 50 is provided inside the outer sleeve 40 so that the outer peripheral wall fits into the inner peripheral wall of the outer sleeve 40 . The inner sleeve 50 is immovable relative to the outer sleeve 40 . A sleeve sealing portion 51 is provided at one end of the inner sleeve 50 . The sleeve sealing portion 51 closes one end of the inner sleeve 50 . Here, the inner sleeve 50 corresponds to the "sleeve".

The spool 60 is made of metal, for example, and has a substantially cylindrical shape. The spool 60 is provided inside the inner sleeve 50 so that its outer peripheral wall slides on the inner peripheral wall of the inner sleeve 50 and can reciprocate in the axial direction. That is, the spool 60 is provided inside the inner sleeve 50 so as to be axially movable relative to the inner sleeve 50 . A spool sealing portion 62 is provided at one end of the spool 60 . The spool sealing portion 62 closes one end of the spool 60 .

A volume variable space Sv is formed between the sleeve sealing portion 51 inside the inner sleeve 50 and the other end of the spool 60 . The volume variable space Sv changes in volume when the spool 60 moves axially with respect to the inner sleeve 50 . That is, the sleeve sealing portion 51 and the spool 60 form a variable volume space Sv whose volume changes.

A spring 63 is provided in the volume variable space Sv. The spring 63 is a so-called coil spring, and has one end in contact with the sleeve sealing portion 51 and the other end in contact with the other end of the spool 60 . A spring 63 biases the spool 60 away from the sleeve sealing portion 51 .

A locking portion 59 is provided radially inside the other end of the outer sleeve 40 . The engaging portion 59 is formed in a cylindrical shape with a bottom, and the outer peripheral wall is provided so as to fit into the inner peripheral wall of the outer sleeve 40 . A hole is formed in the center of the bottom of the engaging portion 59, and the spool sealing portion 62 is positioned inside the hole.

The locking portion 59 can lock one end of the spool 60 with its bottom portion. The locking portion 59 can restrict movement of the spool 60 to the opposite side of the sleeve sealing portion 51 of the spool 60 . This prevents the spool 60 from coming off from the inner sleeve 50 .

The spool 60 is axially movable from a position abutting the locking portion 59 to a position abutting the sleeve sealing portion 51 . That is, the movable range with respect to the sleeve 400 is from the position where the locking portion 59 is abutted (see FIG. 3) to the position where the sleeve sealing portion 51 is abutted. Hereinafter, this movable range of the spool 60 will be referred to as a "stroke section" as appropriate.

As shown in FIG. 3 , the outer diameter of the end of the inner sleeve 50 on the sleeve sealing portion 51 side is smaller than the inner diameter of the outer sleeve 40 . As a result, a cylindrical space St<b>1 that is a substantially cylindrical space is formed between the outer peripheral wall of the inner sleeve 50 at the end on the sleeve sealing portion 51 side and the inner peripheral wall of the outer sleeve 40 .

Further, the inner sleeve 50 is formed with an annular recess Ht. The annular recess Ht is formed so as to be annularly recessed radially inward from a position corresponding to the engaging portion 49 on the outer peripheral wall of the inner sleeve 50 . As a result, an annular space St<b>2 that is an annular space is formed between the annular recess Ht and the inner peripheral wall of the outer sleeve 40 .

Further, the inner sleeve 50 is formed with a channel groove portion 52 . The channel groove portion 52 is formed so as to be recessed radially inward from the outer peripheral wall of the inner sleeve 50 and to extend in the axial direction of the inner sleeve 50 (see FIG. 3). Two flow channel grooves 52 are formed at equal intervals in the circumferential direction of the inner sleeve 50 . The channel groove portion 52 forms an axial supply oil channel RsA as an axial channel portion. That is, axial direction supply oil passage RsA is formed to extend in the axial direction of sleeve 400 at interface T1 between outer sleeve 40 and inner sleeve 50 . One end of the axial supply oil passage RsA is connected to the cylindrical space St1, and the other end is connected to the annular space St2.

As shown in FIG. 3 , regulation grooves 511 and 512 are formed in the inner sleeve 50 . The restricting groove portion 511 is formed so as to be annularly recessed radially outward from a position corresponding to the end portion of the cylindrical space St1 of the inner peripheral wall of the inner sleeve 50 . The restricting groove portion 512 is formed so as to be annularly recessed radially outward from a position corresponding to the annular recessed portion Ht of the inner peripheral wall of the inner sleeve 50 .

The valve seat surface 56 is formed in a substantially cylindrical shape on the bottom surfaces of the regulation grooves 511 and 512 that are the inner walls of the inner sleeve 50 as a sleeve.

A movement restricting portion 513 is formed in the inner sleeve 50 . The movement restricting portion 513 is annularly recessed radially inward from the outer peripheral wall of the inner sleeve 50 between the restricting groove portion 511 and the restricting groove portion 512 . Therefore, a portion of the movement restricting portion 513 in the circumferential direction is connected to the channel groove portion 52 .

The movement restricting portion 513 forms an annular flow path portion Rri. That is, the annular flow path portion Rri is formed in an annular shape so as to extend in the circumferential direction of the sleeve 400 while being connected to the axial supply oil path RsA between the outer sleeve 40 and the inner sleeve 50 .

The sleeve 400 has a retard feed opening ORs, an advance feed opening OAs, a retard opening OR, an advance opening OA, and a recycle opening Ore.

The retarded supply opening ORs is formed to extend in the radial direction of the sleeve 400 and connect the valve seat surface 56 of the inner sleeve 50 with the cylindrical space St1 and the axial supply oil passage RsA (see FIG. 3). . That is, the retarded supply opening ORs communicates the outside of the inner sleeve 50 as a sleeve with the valve seat surface 56 . The retarded supply opening ORs opens into the valve seat surface 56 . Five retarded supply openings ORs are formed at equal intervals within a range of 180 degrees in the circumferential direction of the inner sleeve 50 . Here, the retarded supply opening ORs corresponds to the "flow path".

The advance supply opening OAs is formed to extend in the radial direction of the sleeve 400 and connect the valve seat surface 56 of the inner sleeve 50 with the annular space St2 and the axial supply oil passage RsA (see FIG. 3). That is, the advance supply opening OAs communicates the outside of the inner sleeve 50 as a sleeve with the valve seat surface 56 . The advance supply opening OAs is open to the valve seat surface 56 . Five advance supply openings OAs are formed at equal intervals within a range of 180 degrees in the circumferential direction of the inner sleeve 50 (see FIG. 4). Here, the advance angle supply opening OAs corresponds to the "flow passage".

The retard opening OR is formed to extend in the radial direction of the sleeve 400 and connect the space inside the inner sleeve 50 and the space outside the outer sleeve 40 . A plurality of retarded angle openings OR are formed in the circumferential direction of the sleeve 400 . The retard opening OR communicates with the retard chamber 201 via the retard oil passage 301 .

The advance opening OA is formed to extend in the radial direction of the sleeve 400 and connect the space inside the inner sleeve 50 and the space outside the outer sleeve 40 . The advance angle opening portion OA is formed on the engagement portion 49 side with respect to the retardation angle opening portion OR. A plurality of advance openings OA are formed in the circumferential direction of the sleeve 400 . The advance opening OA communicates with the advance chamber 202 via the advance oil passage 302 .

A substantially cylindrical valve seat surface 55 is formed on the movement restricting portion 513 of the inner sleeve 50 (see FIG. 3). That is, the valve seat surface 55 is formed in a tubular shape on the inner sleeve 50 side of the annular flow path portion Rri. The recycling opening Ore extends in the radial direction of the sleeve 400 and is formed to communicate the valve seat surface 55 and the inner side of the inner sleeve 50 . In other words, the recycling opening Ore connects the annular flow path Rri and the inner space of the inner sleeve 50 . A plurality of recycling openings Ore are formed at equal intervals in the circumferential direction of the inner sleeve 50 .

The spool 60 has a retard supply recess HRs, a retard drain recess HRd, an advance drain recess HAd, an advance supply recess HAs, and drain openings Od1 and Od2. The retard supply recess HRs, the retard drain recess HRd, the advance drain recess HAd, and the advance supply recess HAs are each formed in an annular shape so as to be recessed radially inward from the outer peripheral wall of the spool 60 . The retard supply recess HRs, the retard drain recess HRd, the advance drain recess HAd, and the advance supply recess HAs are arranged in this order in the axial direction of the spool 60 . Further, the retarded drain recess HRd and the advanced drain recess HAd are integrally formed. The retarded drain recess HRd and the advanced drain recess HAd form a specific space Ss with the inner peripheral wall of the inner sleeve 50 . That is, the spool 60 forms a specific space Ss with the sleeve 400 .

The drain opening Od1 is formed to communicate the space inside the spool 60 with the retarded drain recess HRd and the advanced drain recess HAd, that is, the specific space Ss. The drain opening Od2 is formed at the end of the spool 60 on the spool sealing portion 62 side so as to communicate the inner space and the outer space. Two drain openings Od1 are formed at equal intervals in the circumferential direction of the spool 60, for example. For example, four drain openings Od2 are formed at regular intervals in the circumferential direction of the spool 60 .

The retard supply oil passage RRs connects the oil pump 8 and the retard chamber 201 via the hydraulic oil control valve 11 . The advance supply oil passage RAs connects the oil pump 8 and the advance chamber 202 via the hydraulic oil control valve 11 . A retarded angle drain oil passage RRd as a drain oil passage connects the retarded angle chamber 201 and the oil pan 7 . An advance drain oil passage RAd as a drain oil passage connects the advance chamber 202 and the oil pan 7 .

The retarded supply oil passage RRs includes the supply hole portion 101, the shaft hole portion 100, the cylindrical space St1, the axial direction supply oil passage RsA, the retarded supply opening ORs, the regulation groove portion 511, the retarded supply recess HRs, and the retarded opening. The oil pump 8 and the retard chamber 201 are connected via the part OR and the retard oil passage 301 . That is, hydraulic oil between the oil pump 8 and the retard chamber 201 can flow through the retard supply opening ORs as a flow path.

The advance angle supply oil passage RAs includes a supply hole portion 101, a shaft hole portion 100, a cylindrical space St1, an axial direction supply oil passage RsA, an advance angle supply opening portion OAs, a regulation groove portion 512, an advance angle supply recess portion HAs, and an advance angle opening. Portion OA connects the oil pump 8 and the advance chamber 202 via the advance oil passage 302 . That is, hydraulic oil between the oil pump 8 and the advance chamber 202 can flow through the advance supply opening OAs as a flow path.

The retarded drain oil passage RRd connects the retarded chamber 201 and the oil pan 7 via the retarded oil passage 301, the retarded opening OR, the retarded drain recess HRd, and the drain openings Od1 and Od2.

The advance drain oil passage RAd connects the advance chamber 202 and the oil pan 7 via the advance oil passage 302, the advance opening OA, the advance drain recess HAd, and the drain openings Od1 and Od2.

Thus, part of the retard supply passage RRs, the advance supply passage RAs, the retard drain passage RRd, and the advance drain passage RAd is formed inside the hydraulic fluid control valve 11 . Further, the axial supply oil passage RsA is formed to extend in the axial direction of the sleeve 400 in the advance supply oil passage RAs. That is, the sleeve 400 has an axial supply oil passage RsA extending in the axial direction of the sleeve 400 in the advance supply oil passage RAs.

The recycling oil passage Rre connects the retarding drain oil passage RRd and the advancing drain oil passage RAd as drain oil passages to the retarding supply oil passage RRs and the advancing supply oil passage RAs. As shown in FIG. 3, the recycling oil passage Rre extends from the specific space Ss through the recycling opening Ore, the movement regulating portion 513, the annular flow passage portion Rri, the retard supply oil passage RRs and the advance supply oil passage RAs, That is, it is connected to the axial supply oil passage RsA.

The retarded drain oil passage RRd and the advanced drain oil passage RAd as drain oil passages include a retarded oil passage 301, a retarded opening OR, an advanced oil passage 302, an advanced opening OA, a specific space Ss, and a drain opening. It is connected to the space inside the spool 60 via the portion Od1.

The drain opening Od1 is formed in the drain oil passage so as to connect to the specific space Ss and extend radially of the sleeve 400 or the spool 60 from the specific space Ss. The recycling opening Ore is formed to connect to the specific space Ss in the recycling oil passage Rre and extend from the specific space Ss to the side opposite to the drain opening Od1. The recycling oil passage Rre is connected to the retarded drain oil passage RRd and the advanced drain oil passage RAd in the specific space Ss.

As shown in FIG. 3, the drain opening Od1 is formed such that at least a portion of it overlaps the recycling opening Ore in the axial direction of the sleeve 400 or the spool 60 . Also, the drain opening Od1 is formed in the spool 60 so as to extend radially inward of the sleeve 400 or the spool 60 from the specific space Ss. Further, the recycling opening Ore is formed in the inner sleeve 50 so as to extend radially outward of the sleeve 400 or the spool 60 from the specific space Ss.

When the spool 60 is in contact with the locking portion 59 (see FIG. 3), that is, when the spool 60 is positioned at one end of the stroke section, the spool 60 opens the retard opening OR. The oil pump 8 includes a supply hole portion 101 of the retarded supply oil passage RRs, a shaft hole portion 100, a cylindrical space St1, an axial direction supply oil passage RsA, a retarded supply opening ORs, a regulation groove portion 511, and a retarded supply recess HRs. , the retard opening OR and the retard oil passage 301 to the retard chamber 201 . As a result, hydraulic oil can be supplied from the oil pump 8 to the retard chamber 201 via the retard supply oil passage RRs. At this time, the advance chamber 202 is connected to the oil pan 7 via the advance oil passage 302 of the advance drain oil passage RAd, the advance opening OA, the advance drain recess HAd, and the drain openings Od1 and Od2. communicate. As a result, hydraulic oil can be drained from the advance chamber 202 to the oil pan 7 via the advance drain oil passage RAd.

When the spool 60 is positioned between the engaging portion 59 and the sleeve sealing portion 51, i.e., when the spool 60 is positioned in the middle of the stroke section, the oil pump 8 supplies oil through the advance supply oil passage RAs. The hole portion 101, the shaft hole portion 100, the cylindrical space St1, the axial supply oil passage RsA, the advance supply opening OAs, the regulation groove portion 512, the advance supply recess HAs, the advance opening OA, and the advance oil passage 302 are formed. It communicates with the advance chamber 202 via. At this time, the oil pump 8 and the retard chamber 201 are communicated with each other through the retard supply oil passage RRs. As a result, hydraulic oil can be supplied from the oil pump 8 to the retard chamber 201 and the advance chamber 202 via the retard supply oil passage RRs and the advance supply oil passage RAs. However, since the retarded angle drain oil passage RRd and the advanced angle drain oil passage RAd are closed by the spool 60, that is, blocked, the hydraulic oil flows from the retarded angle chamber 201 and the advanced angle chamber 202 to the oil pan 7. not discharged.

When the spool 60 is in contact with the sleeve sealing portion 51, that is, when the spool 60 is positioned at the other end of the stroke section, the retard chamber 201 is closed to the retard oil passage 301 of the retard oil passage RRd. , retarded angle opening OR, retarded angle drain recess HRd, and drain openings Od1 and Od2. At this time, the oil pump 8 and the advance chamber 202 are communicated through the advance supply oil passage RAs. As a result, hydraulic oil can be discharged from the retard chamber 201 to the oil pan 7 via the retard drain oil passage RRd, and can be discharged from the oil pump 8 to the advance chamber 202 via the advance supply oil passage RAs. Hydraulic oil can be supplied to

A filter 58 is provided inside the end portion of the outer sleeve 40 on the sleeve sealing portion 51 side, that is, in the middle of the retard supply oil passage RRs and the advance supply oil passage RAs. The filter 58 is, for example, a disk-shaped mesh. The filter 58 can collect foreign matter contained in the hydraulic oil. Therefore, foreign matter can be prevented from flowing to the downstream side of the filter 58 , that is, the side opposite to the oil pump 8 .

The retarded supply check valve 71 includes a valve body 700 which is formed in a cylindrical shape by winding a rectangular thin metal plate as a single plate material and has an outer peripheral wall provided so as to be able to contact the valve seat surface 56, and a valve body. An overlap formed by overlapping a portion on the valve outer end portion 701 side, which is one end portion in the circumferential direction of 700, radially outside of a portion on the valve inner end portion 702 side, which is the other end portion in the circumferential direction. It has a part 703 . In this embodiment, the portion on the valve outer end portion 701 side, which is one end portion in the circumferential direction of the valve body 700, is radially outward of the portion on the valve inner end portion 702 side, which is the other circumferential end portion. 4 to 7).

The retarded supply check valve 71 is provided in the regulating groove portion 511 so that the outer peripheral wall of the valve body 700 can contact the valve seat surface 56 . The retarded supply check valve 71 is provided in the restricting groove portion 511 so as to be elastically deformable in the radial direction. The retard supply check valve 71 is provided radially inside the inner sleeve 50 with respect to the retard supply opening ORs. The retard supply check valve 71 is provided in the regulating groove portion 511, and when hydraulic oil is not flowing in the retard supply oil passage RRs, that is, when no external force is applied, the portion on the valve outer end portion 701 side is closed. It is in a state of being superimposed on the portion on the valve inner end portion 702 side.

When the hydraulic oil flows from the retarded supply opening ORs side to the retarded supply recessed part HRs side in the retarded supply oil passage RRs, the retarded supply check valve 71 is pushed by the hydraulic oil on the outer peripheral wall of the valve body 700 and is pushed radially. It deforms so as to contract inward, that is, to contract in diameter. As a result, the outer peripheral wall of the valve body 700 of the retarded supply check valve 71 is separated from the valve seat surface 56 to open the valve, and the hydraulic oil flows through the retarded supply opening ORs and the retarded supply check valve 71. can flow to the retarded supply recess HRs side. At this time, the portion on the valve outer end portion 701 side maintains a state in which it partially overlaps with the portion on the valve inner end portion 702 side while expanding the length of the overlapping range.

When the flow rate of the hydraulic oil flowing through the retarded supply oil passage RRs becomes equal to or less than a predetermined value, the retarded supply check valve 71 is deformed so as to expand radially outward, that is, to expand in diameter. Further, when hydraulic fluid flows from the retarded supply recess HRs side to the retarded supply opening ORs side, the inner peripheral wall of the valve body 700 of the retarded supply check valve 71 is pushed radially outward by the hydraulic fluid, and the valve body 700 The valve is closed when the outer peripheral wall of the valve comes into contact with the valve seat surface 56 . This restricts the flow of hydraulic oil from the retarded supply recess HRs side to the retarded supply opening ORs side.

In this manner, the retarded supply check valve 71 functions as a check valve to allow the hydraulic oil to flow from the retarded supply opening ORs side to the retarded supply recessed part HRs side, and to allow the hydraulic oil to flow from the retarded supply recessed part HRs side It is possible to regulate the flow of hydraulic oil to the retard supply opening ORs side. That is, the retard supply check valve 71 is provided on the oil pump 8 side with respect to the spool 60 of the hydraulic oil control valve 11 in the retard supply oil passage RRs so that the hydraulic oil flows from the oil pump 8 side to the retard chamber 201 side. Allow only flow.

Since the configuration of the advance angle supply check valve 72 is the same as that of the retardation angle supply check valve 71 (see FIGS. 4 to 7), detailed description of the configuration will be omitted.

The advance supply check valve 72 is provided in the regulation groove portion 512 so that the outer peripheral wall of the valve body 700 can contact the valve seat surface 56 . The advance supply check valve 72 is provided in the regulation groove portion 512 so as to be elastically deformable in the radial direction. The advance supply check valve 72 is provided radially inside the inner sleeve 50 with respect to the advance supply opening OAs. The advance supply check valve 72 is provided in the regulating groove portion 512, and when hydraulic oil is not flowing in the advance supply oil passage RAs, that is, when no external force is applied, the portion on the valve outer end portion 701 side is closed. It is in a state of being superimposed on the portion on the valve inner end portion 702 side.

When the hydraulic oil flows from the advance supply opening OAs side to the advance supply recess HAs side in the advance supply oil passage RAs, the advance supply check valve 72 is pushed by the hydraulic oil on the outer peripheral wall of the valve body 700 and is pushed radially. It deforms so as to contract inward, that is, to contract in diameter. As a result, the outer peripheral wall of the valve body 700 of the advance supply check valve 72 is separated from the valve seat surface 56 to open the valve, and the hydraulic oil flows through the advance supply opening OAs and the advance supply check valve 72. can flow to the side of the advance supply recess HAs. At this time, the portion on the valve outer end portion 701 side maintains a state in which it partially overlaps with the portion on the valve inner end portion 702 side while expanding the length of the overlapping range.

When the flow rate of the hydraulic oil flowing through the advance supply oil passage RAs becomes equal to or less than a predetermined value, the advance supply check valve 72 is deformed so as to expand radially outward, that is, to expand in diameter. Further, when hydraulic oil flows from the side of the advance supply recess HAs to the side of the advance supply opening OAs, the inner peripheral wall of the valve body 700 of the advance supply check valve 72 is pushed radially outward by the hydraulic oil, and the valve body 700 The valve is closed when the outer peripheral wall of the valve comes into contact with the valve seat surface 56 . This restricts the flow of hydraulic oil from the side of the advance supply recess HAs to the side of the advance supply opening OAs.

In this way, the advance supply check valve 72 functions as a check valve to allow hydraulic oil to flow from the advance supply opening OAs side to the advance supply recess HAs side, and to allow the hydraulic oil to flow from the advance supply supply recess HAs side. It is possible to regulate the flow of hydraulic oil to the advance supply opening OAs side. That is, the advance supply check valve 72 is provided on the oil pump 8 side with respect to the spool 60 of the hydraulic oil control valve 11 in the advance supply oil passage RAs so that the hydraulic oil flows from the oil pump 8 side to the advance chamber 202 side. Allow only flow.

The configuration of the recycle check valve 81 is similar to that of the retarded supply check valve 71 (see FIG. 6) except for the difference in the outer diameter and the fact that a locking portion 91, which will be described later, is not formed. omitted.

The recycle check valve 81 is provided on the recycle oil passage Rre in the movement restricting portion 513, that is, the annular passage portion Rri. The recycle check valve 81 is provided so as to be elastically deformable in the radial direction in the annular flow path portion Rri. The recycle check valve 81 is provided radially outside the inner sleeve 50 with respect to the valve seat surface 55 . The recycle check valve 81 is provided in the annular flow passage portion Rri, and in a state in which hydraulic oil does not flow in the recycle oil passage Rre, that is, in a state in which no external force acts, one end in the circumferential direction is closed to the other end. It is in a state where it overlaps with the part on the side of the part.

When hydraulic oil flows from the recycling opening Ore side to the annular flow path portion Rri side in the recycling oil passage Rre, the inner peripheral wall of the recycle check valve 81 is pushed by the hydraulic oil and expands radially outward, i.e., expands in diameter. It transforms in this way. As a result, the inner peripheral wall of the recycle check valve 81 is separated from the valve seat surface 55 to open the valve, and the hydraulic oil can flow through the recycle check valve 81 to the annular flow path portion Rri side.

When the flow rate of the hydraulic oil flowing through the recycled oil passage Rre becomes equal to or less than a predetermined value, the recycle check valve 81 deforms so as to contract radially inward, that is, to contract in diameter. Further, when hydraulic fluid flows from the annular flow path portion Rri side to the recycle opening portion Ore side, the outer peripheral wall of the recycle check valve 81 is pushed radially inward by the hydraulic fluid and contacts the valve seat surface 55 to close the valve. As a result, the flow of hydraulic oil from the annular flow path portion Rri side to the recycling opening portion Ore side is restricted.

In this manner, the recycle check valve 81 functions as a check valve to allow the hydraulic fluid to flow from the recycling opening Ore side to the annular flow path portion Rri side, and to flow from the annular flow path portion Rri side to the recycling opening Ore. It is possible to regulate the flow of hydraulic oil to the side. That is, the recycle check valve 81 allows hydraulic oil to flow only from the drain oil passage side to the retard supply oil passage RRs side and the advance supply oil passage RAs side in the recycle oil passage Rre. The movement restricting portion 513 can restrict axial movement of the recycle check valve 81 .

As shown in FIGS. 6 and 7 , the retarded supply check valve 71 further has a locking portion 91 . The locking portion 91 is formed on the outer peripheral wall of the valve body 700 . More specifically, the locking portion 91 is formed integrally with the valve body 700 so as to protrude radially outward from the outer peripheral wall of the valve outer end portion 701 of the valve body 700 .

As shown in FIG. 4 , the rotation restricting portion 95 is formed on the valve seat surface 56 so as to open to the valve seat surface 56 . The retarded supply check valve 71 is provided in the restricting groove portion 511 so that the engaging portion 91 is positioned within the rotation restricting portion 95 . Thus, the rotation restricting portion 95 can restrict the circumferential rotation of the retarded supply check valve 71 with respect to the inner sleeve 50 by locking the locking portion 91 with the opening.

<2>
As shown in FIGS. 4 to 7, the valve body 700 has a portion on the side of the valve outer end 701, which is one end in the circumferential direction, and a portion on the side of the valve inner end 702, which is the other end in the circumferential direction. has an overlapped portion 703 formed by overlapping radially outwardly of the . The locking portion 91 is formed on the outer peripheral wall of a portion of the valve body 700 on the valve outer end portion 701 side.

<4>
As shown in FIG. 4 , the locking portion 91 is formed to protrude radially outward from the outer peripheral wall of the valve body 700 . The rotation restricting portion 95 is formed so as to be recessed radially outward from the valve seat surface 56 .

Here, a method of manufacturing the retarded supply check valve 71 including the locking portion 91 will be described. As shown in FIGS. 6 to 8, the retarded supply check valve 71 is formed by winding a valve body 700 (see FIG. 8), which is a rectangular thin metal plate, into a cylindrical shape.

<5>
As shown in FIGS. 6 to 8, the locking portion 91 is formed by bending a portion 911 extending in the circumferential direction from an outer valve end portion 701, which is one end portion in the circumferential direction of the valve body 700, radially outward. be.

<7>
As shown in FIG. 5, when the plate thickness of the valve body 700 is t, and the projection height of the locking portion 91 from the outer peripheral wall of the valve body 700 is h, the retarded supply check valve 71 has a value of 0.5≤h. /t≦2. In this embodiment, the engaging portion 91 is formed by bending a portion having the same plate thickness as the valve body 700 . Therefore, h=t, and the retarded supply check valve 71 is formed so that h/t=1.

<6>
As shown in FIGS. 4 and 5 , the rotation restricting portion 95 is recessed radially outward from the valve seat surface 56 and radially penetrates the inner sleeve 50 . That is, the rotation restricting portion 95 is formed so as to allow the valve seat surface 56 and the outer side of the inner sleeve 50 to communicate with each other. The rotation restricting portion 95 is formed in a range in the circumferential direction of the inner sleeve 50 in which the retarded supply opening ORs is not formed. More specifically, when the inner sleeve 50 is divided into two regions by a virtual plane VP1 including the axis Ax1 of the inner sleeve 50, the rotation restricting portion 95 is formed in one of the two regions (see FIG. 4). ).

<3>
As shown in FIG. 4, five retarded supply openings ORs are formed in the inner sleeve 50 in the circumferential direction. Four retarded supply openings ORs, which is more than half of the five retarded supply openings ORs, are formed to open toward the outer peripheral wall of the portion of the valve body 700 other than the overlapping portion 703 .

In the graph shown in FIG. 9, the x-axis represents the retarded supply opening opening toward the outer peripheral wall of the portion of the valve body 700 other than the overlapping portion 703 with respect to the total opening area of the plurality of retarded supply openings ORs. It corresponds to the ratio of the open area of the ORs. The y-axis corresponds to the displacement of the overlapping portion 703 of the valve body 700 when the valve is open.

As shown in FIG. 9, it can be seen that the smaller the value of x, the larger the value of y. Also, it can be seen that the value of y is 0 when the value of x is 0.5 or more. From the above, if more than half of the plurality of retarded supply openings ORs are formed to open toward the outer peripheral wall of the portion of the valve body 700 other than the overlapped portion 703, the overlapped portion 703 at the time of valve opening It can be seen that the displacement of can be reduced.

In the present embodiment, as described above, four retarded supply openings ORs, which is more than half of the five retarded supply openings ORs, extend toward the outer peripheral wall of the portion of the valve body 700 other than the overlapping portion 703. It is formed to open Therefore, the displacement of the overlapping portion 703 when the valve is opened can be reduced, and even if the projection height of the locking portion 91 from the outer peripheral wall of the valve body 700 is small, the locking portion 91 is prevented from slipping out of the rotation restricting portion 95. can.

The configuration of the advance supply check valve 72 is the same as that of the retard supply check valve 71 (see FIGS. 4 to 7), and a locking portion 91 is formed on the outer peripheral wall of the valve body 700 . Further, as with the retard supply openings ORs (see FIG. 4), a plurality of the advance supply openings OAs are also formed in the circumferential direction of the inner sleeve 50 . Furthermore, the rotation restricting portion 95 is also formed so as to be aligned with the advance supply opening OAs in the circumferential direction of the inner sleeve 50 .

As shown in FIG. 1, a linear solenoid 9 is provided on the opposite side of the spool 60 from the cam shaft 3 . The linear solenoid 9 is provided so as to contact the spool sealing portion 62 . When energized, the linear solenoid 9 presses the spool 60 toward the cam shaft 3 via the spool sealing portion 62 against the biasing force of the spring 63 . This causes the spool 60 to change its axial position with respect to the sleeve 400 in the stroke section.

The volume variable space Sv communicates with the retarded drain oil passage RRd and the advanced drain oil passage RAd. Therefore, the volume variable space Sv is open to the atmosphere via the drain openings Od2 of the retarded drain oil passage RRd and the advanced drain oil passage RAd. Thereby, the pressure of the volume variable space Sv can be made equivalent to the atmospheric pressure. Therefore, it is possible to smoothly move the spool 60 in the axial direction.

Next, changes in the flow of hydraulic oil due to the position of the spool 60 with respect to the sleeve 400 will be described.

When the spool 60 is in contact with the engaging portion 59, that is, when the spool 60 is positioned at one end of the stroke section, hydraulic oil is supplied from the oil pump 8 to the retarded angle supply oil passage RRs. It is supplied to the corner chamber 201 . At this time, the working oil is discharged from the advance chamber 202 to the oil pan 7 via the advance drain oil passage RAd. Further, part of the hydraulic oil flowing through the advance drain oil passage RAd is returned to the axial supply oil passage RsA side and the retarding oil supply passage RRs side via the recycling oil passage Rre. As a result, the hydraulic oil discharged from the advance chamber 202 can be reused. At this time, the recycle check valve 81 suppresses reverse flow from the axial supply oil passage RsA side to the drain oil passage side in the recycle oil passage Rre.

When the spool 60 is positioned between the engaging portion 59 and the sleeve sealing portion 51, that is, when the spool 60 is positioned in the middle of the stroke section, the hydraulic oil is supplied from the oil pump 8 to the retarded angle supply oil passage. It is supplied to the retard chamber 201 via RRs. At this time, hydraulic oil is supplied from the oil pump 8 to the advance chamber 202 via the advance supply oil passage RAs. At this time, since the retarded angle drain oil passage RRd and the advanced angle drain oil passage RAd are closed by the spool 60, the hydraulic oil does not flow through the drain oil passages, and the hydraulic oil flows through the recycled oil passage Rre to the shaft. It is not returned to the directional supply oil passage RsA side.

When the spool 60 is in contact with the sleeve sealing portion 51, i.e., when the spool 60 is positioned at the other end of the stroke section, hydraulic oil flows from the oil pump 8 through the advance supply oil passage RAs. It is supplied to the advance chamber 202 . Also, at this time, the hydraulic oil is discharged from the retarded angle chamber 201 to the oil pan 7 via the retarded angle drain oil passage RRd. Further, part of the hydraulic oil flowing through the retarded angle drain oil passage RRd is returned to the axial supply oil passage RsA side and the advanced angle supply oil passage RAs side via the recycled oil passage Rre. As a result, the hydraulic oil discharged from the retard chamber 201 can be reused. At this time, the recycle check valve 81 suppresses reverse flow from the axial supply oil passage RsA side to the drain oil passage side in the recycle oil passage Rre.

This embodiment further includes a locking pin 33 (see FIGS. 1 and 2). The lock pin 33 is formed in a cylindrical shape with a bottom, and is accommodated in an accommodation hole 321 formed in the vane 32 so as to be able to reciprocate in the axial direction. A spring 34 is provided inside the lock pin 33 . The spring 34 biases the lock pin 33 toward the plate portion 222 of the case 22 . A fitting recess 25 is formed on the vane 32 side of the plate portion 222 of the case 22 .

The lock pin 33 can be fitted into the fitting recess 25 when the vane rotor 30 is at the most retarded position with respect to the housing 20 . When lock pin 33 is fitted into fitting recess 25 , relative rotation of vane rotor 30 with respect to housing 20 is restricted. On the other hand, when the lock pin 33 is not fitted into the fitting recess 25, relative rotation of the vane rotor 30 with respect to the housing 20 is permitted.

A pin control oil passage 304 communicating with the advance chamber 202 is formed between the lock pin 33 of the vane 32 and the advance chamber 202 (see FIG. 2). The pressure of the hydraulic oil flowing from the advance chamber 202 into the pin control oil passage 304 acts in the direction in which the lock pin 33 is pulled out of the fitting recess 25 against the biasing force of the spring 34 .

In the valve timing adjusting device 10 configured as described above, when hydraulic oil is supplied to the advance chamber 202, the hydraulic oil flows into the pin control oil passage 304, the lock pin 33 is pulled out of the fitting recess 25, and the housing is closed. 20, relative rotation of the vane rotor 30 is permitted.

Next, operation of the valve timing adjusting device 10 will be described. The valve timing adjusting device 10 presses the spool 60 of the hydraulic oil control valve 11 by driving the linear solenoid 9 to connect the hydraulic oil control valve 11 to the oil pump 8 and the retard chamber 201 , and the advance chamber 202 . and the oil pan 7; a second operating state in which the oil pump 8 and the advance chamber 202 are connected while the retard chamber 201 and the oil pan 7 are connected; A phase holding state in which the retardation chamber 201 and the advance chamber 202 are connected and the phase between the retardation chamber 201 and the advance chamber 202 is cut off from the oil pan 7 to hold the phase of the phase converter PC. Let

In the first operating state, hydraulic oil is supplied to the retard chamber 201 via the retard supply oil passage RRs, and hydraulic oil is supplied to the oil pan 7 from the advance chamber 202 via the advance drain oil passage RAd. returned. Further, the working oil is returned from the advance drain oil passage RAd to the retard supply oil passage RRs via the recycling oil passage Rre.

In the second operating state, hydraulic oil is supplied to the advance chamber 202 via the advance supply oil passage RAs, and hydraulic oil is supplied from the retard chamber 201 to the oil pan 7 via the retard drain oil passage RRd. returned. Also, the working oil is returned from the retard drain oil passage RRd to the advance supply oil passage RAs via the recycling oil passage Rre.

In the phase holding state, the retard chamber 201 and the advance chamber 202 are operated while hydraulic oil is supplied to the retard chamber 201 and the advance chamber 202 via the retard supply oil passage RRs and the advance supply oil passage RAs. Oil discharge is regulated.

The valve timing adjusting device 10 brings the hydraulic oil control valve 11 into the first operating state when the rotation phase of the camshaft 3 is on the advance side of the target value. As a result, the vane rotor 30 rotates in the retarded angle direction relative to the housing 20, and the rotational phase of the camshaft 3 changes to the retarded angle side.

Further, when the rotational phase of the camshaft 3 is retarded relative to the target value, the valve timing adjusting device 10 brings the hydraulic oil control valve 11 into the second operating state. As a result, the vane rotor 30 rotates in the advance direction relative to the housing 20, and the rotation phase of the camshaft 3 changes to the advance side.

Further, when the rotational phase of the camshaft 3 coincides with the target value, the valve timing adjusting device 10 brings the hydraulic oil control valve 11 into the phase holding state. As a result, the rotational phase of the camshaft 3 is maintained.

In the present embodiment, when the hydraulic oil control valve 11 is in the first operating state or the second operating state, the drain oil passage is connected via the recycling oil passage Rre to the retard supply oil passage RRs side or the advance supply oil passage RAs side. Hydraulic oil is returned to As a result, hydraulic fluid discharged from the advance chamber 202 or the retard chamber 201 can be reused.

Further, when the hydraulic oil control valve 11 is in the first operating state or the second operating state, the recycle check valve 81 suppresses reverse flow from each supply oil passage side to the drain oil passage side in the recycle oil passage Rre.

As described above, <1> the present embodiment is capable of controlling the flow of fluid supplied from the hydraulic oil supply source OS as a fluid supply source to the retard chambers 201 and the advance chambers 202 as fluid supply targets. The oil control valve 11 includes an inner sleeve 50 as a sleeve, a valve seat surface 56, a retard supply opening ORs as a flow path, an advance supply opening OAs, a spool 60, and a retard supply check as a check valve. A valve 71 , an advance supply check valve 72 and a rotation restricting portion 95 are provided. The inner sleeve 50 is formed in a tubular shape. The valve seat surface 56 is cylindrically formed on the inner wall of the inner sleeve 50 . The retarded angle supply opening ORs and the advanced angle supply opening OAs are formed between the outer side of the inner sleeve 50 and the valve seat so that the hydraulic oil can flow between the hydraulic oil supply source OS and the retarded angle chamber 201 and the advanced angle chamber 202. Communicates with surface 56 . The spool 60 is axially movably provided within the inner sleeve 50 , and depending on the position in the axial direction with respect to the inner sleeve 50 , hydraulic fluid is supplied between the hydraulic fluid supply source OS and the retard chambers 201 and advance chambers 202 . can control the flow of

The retard supply check valve 71 and the advance supply check valve 72 are composed of a valve main body 700 which is formed in a cylindrical shape by winding a single plate member and whose outer peripheral wall is provided so as to be able to abut against the valve seat surface 56, and a valve body 700. The valve body 700 has a locking portion 91 formed on the outer peripheral wall of the valve body 700. The valve is opened by reducing the diameter of the outer peripheral wall of the valve body 700 away from the valve seat surface 56, and the outer peripheral wall of the valve body 700 serves as the valve seat. The valve closes by expanding to abut surface 56 . The rotation restricting portion 95 is formed on the valve seat surface 56 and can restrict rotation of the retard supply check valve 71 and the advance supply check valve 72 with respect to the inner sleeve 50 by engaging the engaging portion 91 .

In this embodiment, rotation of the retard supply check valve 71 and the advance supply check valve 72 with respect to the inner sleeve 50 can be regulated by the rotation restricting portion 95 . Therefore, in the circumferential direction of the inner sleeve 50, the valve outer end 701, which is one end in the circumferential direction of the valve main body 700, or the other end with respect to the retard supply opening ORs and the advance supply opening OAs. A change in the position of a certain valve inner end 702 can be suppressed. As a result, it is possible to suppress a change in the deformed shape of the valve body 700 when the valve body 700 is opened and closed. Therefore, the performance of the hydraulic oil control valve 11 can be stabilized.

<2> In the present embodiment, the outer valve end portion 701, which is one end portion in the circumferential direction, of the valve main body 700 is the diameter of the portion on the inner valve end portion 702 side, which is the other end portion in the circumferential direction. It has an overlapping portion 703 formed by overlapping in the direction outside. The locking portion 91 is formed on the outer peripheral wall of a portion of the valve body 700 on the valve outer end portion 701 side.

Therefore, the locking portion 91 can be formed relatively easily.

Further, <3> in the present embodiment, a plurality of retard supply openings ORs and advance supply openings OAs are formed in the circumferential direction of the inner sleeve 50 . More than half of the plurality of retarded angle supply openings ORs and advanced angle supply openings OAs are formed to open toward the outer peripheral wall of the portion of the valve body 700 other than the overlapping portion 703 .

Therefore, when the retarded supply check valve 71 is opened, the outer peripheral wall of the valve body 700 is urged toward the rotation restricting portion 95 by the hydraulic oil flow F1 from the retarded supply opening ORs (see FIG. 4). . Further, when the advance supply check valve 72 is opened, the outer peripheral wall of the valve body 700 is urged toward the rotation restricting portion 95 by the flow of hydraulic oil from the advance supply opening OAs. As a result, even when the projection height of the locking portion 91 from the outer peripheral wall of the valve body 700 is small, the locking portion 91 can be prevented from slipping out of the rotation restricting portion 95 . Therefore, by reducing the size of the engaging portion 91, it is possible to secure the insertability of the check valve at the time of assembly and reduce the assembly cost, while ensuring that the rotation restricting portion 95 functions to restrict the rotation of the check valve.

<4> In the present embodiment, the locking portion 91 is formed to protrude radially outward from the outer peripheral wall of the valve body 700 . The rotation restricting portion 95 is formed so as to be recessed radially outward from the valve seat surface 56 .

Therefore, the locking portion 91 and the rotation restricting portion 95 can be formed relatively easily.

<5> In the present embodiment, the locking portion 91 is formed by bending a portion 911 extending in the circumferential direction from the valve outer end portion 701, which is one end portion in the circumferential direction of the valve body 700, radially outward. be done.

Therefore, the locking portion 91 can be formed at relatively low cost.

<6> In the present embodiment, the rotation restricting portion 95 is formed so as to allow the valve seat surface 56 and the outer side of the inner sleeve 50 to communicate with each other.

Therefore, the rotation restricting portion 95 can be easily formed by machining from the outside of the inner sleeve 50 . As a result, the hydraulic oil control valve 11 can be manufactured at low cost.

<7> In this embodiment, if the plate thickness of the valve body 700 is t, and the projection height of the locking portion 91 from the outer peripheral wall of the valve body 700 is h, then the retard supply check valve 71 and the advance supply The check valve 72 is formed so that 0.5≤h/t≤2.

Therefore, the locking portion 91 can be made small, and the insertability of the check valve at the time of assembly can be ensured. As a result, assembly costs can be reduced.

<9> The present embodiment is a valve timing adjusting device 10 that adjusts the valve timing of the engine 1, and includes a phase converter PC and a hydraulic oil control valve 11. FIG. The phase conversion unit PC is attached to the camshaft 3 of the engine 1 so as to be rotatable in conjunction with the crankshaft 2 of the engine 1, and has hydraulic chambers (retarding chamber 201 and advancing chamber 202) to which fluid is supplied. Then, the phases of the crankshaft 2 and the camshaft 3 are changed by hydraulic oil supplied to the retard chamber 201 and the advance chamber 202 . The hydraulic oil control valve 11 controls the hydraulic oil supplied from the hydraulic oil supply source OS to the retard chamber 201 and the advance chamber 202 .

The hydraulic oil control valve 11 of the present embodiment can suppress changes in deformation shape of the valve body 700 when the valve is opened and closed. Therefore, the performance of the hydraulic oil control valve 11 can be stabilized. Therefore, the performance of the valve timing adjusting device 10 can be stabilized.

(Second embodiment)
FIG. 10 shows part of the hydraulic fluid control valve according to the second embodiment. The second embodiment differs from the first embodiment in the configuration of the rotation restricting portion 95 and the like.

In the present embodiment, the rotation restricting portion 95 is formed in one of the plurality of retarded supply openings ORs arranged in the circumferential direction of the inner sleeve 50 and located at the endmost one of the retarded supply openings ORs. That is, in this embodiment, one of the plurality of retarded supply openings ORs is also used as the rotation restricting portion 95 . Therefore, processing costs can be reduced.

The retarded supply check valve 71 is provided in the restricting groove portion 511 so that the engaging portion 91 is positioned within the rotation restricting portion 95 . As in the first embodiment, the rotation restricting portion 95 can restrict circumferential rotation of the retarded supply check valve 71 with respect to the inner sleeve 50 by engaging the engaging portion 91 .

<3>
More than half of the plurality of retarded supply openings ORs are formed to open toward the outer peripheral wall of the portion of the valve body 700 other than the overlapping portion 703 .

Therefore, as in the first embodiment, by reducing the size of the locking portion 91, the insertion of the check valve during assembly is ensured, and the assembly cost is reduced. can be exhibited.

The configuration of the advance supply check valve 72 is similar to that of the retard supply check valve 71 . Further, as with the retard supply openings ORs, a plurality of advance supply openings OAs are formed in the circumferential direction of the inner sleeve 50 . Further, the rotation restricting portion 95 is formed in one lead-angle supply opening OAs located at the extreme end among the plurality of lead-angle supply openings OAs arranged in the circumferential direction of the inner sleeve 50 .

(Third Embodiment)
A portion of the hydraulic fluid control valve according to the third embodiment is shown in FIG. The third embodiment differs from the first embodiment in the configuration and the like of the rotation restricting portion 95 .

In this embodiment, the rotation restricting portion 95 is formed so as to be recessed radially outward from the valve seat surface 56 at a position different from the retarded supply opening ORs in the circumferential direction of the inner sleeve 50 . Note that the rotation restricting portion 95 is not formed so as to allow the valve seat surface 56 and the outer side of the inner sleeve 50 to communicate with each other.

When the inner sleeve 50 is divided into two regions by a virtual plane VP1 including the axis Ax1 of the inner sleeve 50, the rotation restricting portion 95 is formed in one of the two regions (see FIG. 11).

The retarded supply check valve 71 is provided in the restricting groove portion 511 so that the engaging portion 91 is positioned within the rotation restricting portion 95 . As in the first embodiment, the rotation restricting portion 95 can restrict circumferential rotation of the retarded supply check valve 71 with respect to the inner sleeve 50 by engaging the engaging portion 91 .

<3>
More than half of the plurality of retarded supply openings ORs are formed to open toward the outer peripheral wall of the portion of the valve body 700 other than the overlapping portion 703 .

Therefore, as in the first embodiment, by reducing the size of the locking portion 91, the insertion of the check valve during assembly is ensured, and the assembly cost is reduced. can be exhibited.

The configuration of the advance supply check valve 72 is similar to that of the retard supply check valve 71 . Further, as with the retard supply openings ORs, a plurality of advance supply openings OAs are formed in the circumferential direction of the inner sleeve 50 . Further, the rotation restricting portion 95 is formed so as to be recessed radially outward from the valve seat surface 56 at a position different from the circumferential advance supply opening OAs of the inner sleeve 50 .

(Fourth embodiment)
A portion of the hydraulic fluid control valve according to the fourth embodiment is shown in FIG. The fourth embodiment differs from the first embodiment in the configuration of check valves and the like.

In the present embodiment, the locking portion 91 includes two portions 911 (see FIG. 12A) extending from the valve outer end portion 701 of the valve body 700 of the retarded supply check valve 71 in the lateral direction of the valve body 700 . It is formed by bending toward one surface side, that is, toward the outer peripheral wall side of the valve body 700 (see FIG. 12(B)). Therefore, the locking portion 91 can be formed at relatively low cost.

<7>
Here, if the plate thickness of the valve body 700 is t, and the projection height of the locking portion 91 from the outer peripheral wall of the valve body 700 is h, then the retarded supply check valve 71 has a value of 0.5≤h/t≤2. is formed to be In this embodiment, h=2t, and the retarded supply check valve 71 is formed so that h/t=2.

Therefore, the locking portion 91 can be made small, and the insertability of the check valve at the time of assembly can be ensured. As a result, assembly costs can be reduced.

The configuration of the advance supply check valve 72 is similar to that of the retard supply check valve 71 .

(Fifth embodiment)
A portion of the hydraulic fluid control valve according to the fifth embodiment is shown in FIG. The fifth embodiment differs from the first embodiment in the configuration of check valves and the like.

In this embodiment, the engaging portion 91 is formed to protrude radially outward from the outer peripheral wall of the valve outer end portion 701 of the valve main body 700 of the retarded supply check valve 71 in a substantially cylindrical shape.

As shown in FIG. 13, for example, before winding a valve body 700, which is a rectangular thin metal plate, into a cylindrical shape, punching or the like is performed from one side of the valve outer end portion 701, which is one end of the valve body 700. Thereby, it is possible to form the engaging portion 91 projecting to the other surface side. Therefore, the locking portion 91 can be formed at relatively low cost.

<7>
Here, if the plate thickness of the valve body 700 is t, and the projection height of the locking portion 91 from the outer peripheral wall of the valve body 700 is h, then the retarded supply check valve 71 has a value of 0.5≤h/t≤2. is formed to be In this embodiment, h=t, and the retarded supply check valve 71 is formed so that h/t=1.

Therefore, the locking portion 91 can be made small, and the insertability of the check valve at the time of assembly can be ensured. As a result, assembly costs can be reduced.

The configuration of the advance supply check valve 72 is similar to that of the retard supply check valve 71 .

(Other embodiments)
In the above-described embodiment, an example in which the hydraulic oil control valve 11 includes five flow passages (the retard supply opening ORs and the advance supply opening OAs) in the circumferential direction of the inner sleeve 50 is shown. On the other hand, in other embodiments, the hydraulic oil control valve 11 has 1 to 4 or 6 or more flow passages (retard supply openings ORs, advance supply openings ORs) in the circumferential direction of the inner sleeve 50. OAs) may be provided. Here, when one channel portion is provided, it is desirable to form the rotation restricting portion 95 at a position different from that of the channel portion.

Moreover, in the above-described embodiment, more than half of the plurality of flow path portions are formed to open toward the outer peripheral wall of the portion of the valve body other than the overlapping portion. On the other hand, in other embodiments, less than half of the plurality of flow passage portions may be formed so as to open toward the outer peripheral wall of the portion of the valve body other than the overlapping portion.

In another embodiment, the locking portion 91 may be formed at a position other than the outer valve end portion 701 which is one end portion in the circumferential direction of the valve body 700 . In addition, the valve main body 700 does not have to overlap the portion on the valve outer end portion 701 side and the portion on the valve inner end portion 702 side in the circumferential direction.

In another embodiment, the check valve may be formed such that h/t<0.5 and 2<h/t.

<8>
Further, in another embodiment, the locking portion may be formed so as to be recessed radially inward from the outer peripheral wall of the valve body, and the rotation restricting portion may be formed so as to protrude radially inward from the valve seat surface. .

Further, in another embodiment, the hydraulic oil control valve 11 may include only one of the retard supply check valve 71 and the advance supply check valve 72 . Also, the recycle check valve 81 may not be provided. Also, the outer sleeve 40 may not be provided.

The fluid control valve according to the present disclosure can be used not only for valve timing adjustment devices, but also for controlling the flow of fluid supplied to supply targets such as other equipment.

Thus, the present disclosure is not limited to the above embodiments, and can be embodied in various forms without departing from the scope of the present disclosure.

11 Hydraulic oil control valve (fluid control valve) OS Hydraulic oil supply source (fluid supply source) 201 Retard chamber (fluid supply target) 202 Advance chamber (fluid supply target) 50 Inner sleeve (sleeve) 56 Valve seat surface, ORs retarded angle supply opening (flow path), OAs advance angle supply opening (flow path), 60 spool, 71 retarded angle supply check valve (check valve), 72 advance angle supply check valve (check valve), 700 valve body, 91 locking portion, 95 rotation restricting portion

Claims (9)

A fluid control valve (11) capable of controlling the flow of fluid supplied from a fluid supply source (OS) to fluid supply targets (201, 202),
a tubular sleeve (50);
a valve seat surface (56) formed cylindrically on the inner wall of the sleeve;
flow path portions (ORs, OAs) communicating between the outside of the sleeve and the valve seat surface so that the fluid can flow between the fluid supply source and the fluid supply target;
a spool (60) axially movable within the sleeve and capable of controlling fluid flow between the fluid source and the fluid target depending on the axial position relative to the sleeve;
A valve body (700) formed in a cylindrical shape and having an outer peripheral wall provided so as to be able to abut against the valve seat surface; A check valve (71, 72) and
a rotation restricting portion (95) formed on the valve seat surface and capable of restricting rotation of the check valve with respect to the sleeve by engaging the engaging portion;
A fluid control valve comprising: The valve main body has a portion on the side of the valve outer end (701), which is one end in the circumferential direction, radially outward of a portion on the side of the valve inner end (702), which is the other end in the circumferential direction. has an overlapping portion (703) formed by overlapping,
2. The fluid control valve according to claim 1, wherein the locking portion is formed on an outer peripheral wall of a portion of the valve body on the valve outer end side. A plurality of the flow passage portions are formed in the circumferential direction of the sleeve,
3. The fluid control valve according to claim 2, wherein more than half of the flow passage portions are formed to open toward the outer peripheral wall of the portion of the valve body other than the overlapping portion. The locking portion is formed to protrude radially outward from an outer peripheral wall of the valve body,
The fluid control valve according to any one of claims 1 to 3, wherein the rotation restricting portion is formed so as to be recessed radially outward from the valve seat surface. 5. The engaging portion is formed by bending a portion (911) extending in the circumferential direction from the valve outer end portion (701), which is one end portion in the circumferential direction of the valve body, radially outward. A fluid control valve as described in . 6. The fluid control valve according to claim 4, wherein the rotation restricting portion is formed so as to allow communication between the valve seat surface and the outside of the sleeve. Assuming that the plate thickness of the valve body is t, and the protrusion height of the locking portion from the outer peripheral wall of the valve body is h,
7. The fluid control valve according to any one of claims 4 to 6, wherein the check valve is formed so that 0.5≤h/t≤2. The locking portion is formed so as to be recessed radially inward from the outer peripheral wall of the valve body,
The fluid control valve according to any one of claims 1 to 3, wherein the rotation restricting portion is formed to protrude radially inward from the valve seat surface. A valve timing adjusting device (10) for adjusting the valve timing of an internal combustion engine (1),
It is mounted on the driven shaft (3) of the internal combustion engine so as to be rotatable in conjunction with the drive shaft (2) of the internal combustion engine, and has hydraulic chambers (201, 202) to which the fluid is supplied. a phase conversion unit (PC) for converting the phase between the drive shaft and the driven shaft by the fluid supplied to the
The fluid control valve (11) according to any one of claims 1 to 8, which controls the fluid supplied from the fluid supply source to the hydraulic chamber;
valve timing adjustment device.

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