WO2001029377A1

WO2001029377A1 - Valve timing adjusting device

Info

Publication number: WO2001029377A1
Application number: PCT/JP1999/005864
Authority: WO
Inventors: Katsuyuki Fukuhara; Mutsuo Sekiya
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 1999-10-22
Filing date: 1999-10-22
Publication date: 2001-04-26
Also published as: US20020000213A1

Abstract

A valve timing adjusting device, comprising a housing (31) formed integrally with a timing pulley (30) driven by a crankshaft, a shoe housing (33) connected to the housing (31) and having a plurality of shoes (33a) installed projectedly on its inner peripheral surface, and a rotor (34) which is stored rotatably in the shoe housing (33), divides the spaces between the plurality of shoes (33a) into retard angle hydraulic chamber (35) and advance angle hydraulic chamber (36) through a plurality of vanes (34a) installed projectedly on its outer peripheral surface, and allowed to be connected co-axially to a camshaft (2), wherein a projected part (46) projected axially is provided on the contact surface of the rotor (34) with the housing (31), and a recessed part (47) fitted closely to the projected part (46) is provided in the contact surface of the housing (31) with the rotor (34).

Description

Description Valve Timing Adjuster Technical Field

The present invention relates to a valve timing adjustment device for changing the opening / closing timing of an intake valve or an exhaust valve according to the operating conditions of an engine. Background art

Conventionally, as a vane type valve timing adjusting device, there is known a device disclosed in Japanese Patent Application Laid-Open No. Hei 9-65007.

1 and 2 are drawings showing a conventional vane type valve timing adjusting device attached to an engine camshaft. FIG. 1 is a longitudinal sectional view of a valve timing adjusting device, and FIG. The figure is a sectional view taken along the line III-III of FIG. In the figure, reference numeral 1 denotes a chain sprocket which receives a driving force from a crankshaft (not shown) as a drive shaft of the engine via a chain (not shown) and rotates in synchronization with the crankshaft. The camshaft 2 as a driven shaft receives driving force from the chain sprocket 1 and opens and closes at least one of an intake valve (not shown) and an exhaust valve (not shown). The cam shaft 2 is rotatable within a predetermined angle range with respect to the chain sprocket 1.

As shown in FIG. 1, a chain plate 1 as a housing member, a show housing 3 and a front plate 4 as a cover member are coaxially fixed by a bolt 5. The inner peripheral wall of the boss 1a of the chain bracket 1 is fitted to the tip 2a of the cam shaft 2 so as to be relatively rotatable. I have. The housing housing 3 and the front plate 4 can be positioned in the rotational angle direction by a knock pin 6, and the chain bracket 1 and the housing housing 3 can be positioned by a different knock pin (not shown) in the rotational angle direction. It has been done. As shown in FIG. 1 and FIG. 2, the shoe housing 3 has trapezoidal shoes 3a and 3b facing each other. The opposing surfaces of the shows 3a and 3b are formed in an arcuate cross-section, and two gaps in the circumferential direction of the shows 3a and 3b are provided with vanes 7a and 7b described later, respectively. A fan-shaped space as an accommodation room is formed. The vane rotor 7 is composed of fan-shaped vanes 7a and 7b and a supporting member 7c integrally fixed to the camshaft 2 by a port 8 and supporting the vanes 7a and 7b. It is schematically configured. The vanes 7a and 7b are rotatably accommodated in a fan-shaped space formed in a circumferential gap between the shows 3a and 3b. A part 7 d of the inlet of the ventilator 7 is coaxially fitted to the front end 2 a of the camshaft 2, and a knock pin (not shown) is provided between the vane 7 and the camshaft 2. The positioning in the direction of the rotation angle is performed by. The cylindrical projection 9 integrally fixed to the ventilator 7 is fitted to the inner peripheral wall of the front plate 4 so as to be relatively rotatable. The minute clearances 10 and 11 are provided between the outer peripheral wall of the ventilator overnight 7 and the inner peripheral wall of the shower housing 3, and the ventilator overnight 7 can rotate relative to the shutter housing 3. It is. A retard hydraulic chamber 12 is formed between the case 3a and the vane 7a, and a retard hydraulic chamber 13 is formed between the shroud 3b and the van 7b. An advanced hydraulic chamber 14 is formed between the window 3a and the van 7b, and an advanced hydraulic chamber 15 is formed between the show 3b and the van 7a. Ventro — The oil passage 16 as a groove passage at the contact portion with the cylindrical protrusion 9 at the axial end surfaces of the support member 7 c at the end 7, and the groove passage at the contact portion with the cam shaft 2. Oil passages 17 are provided in the shape of a letter C and shifted in the circumferential direction. You. The oil passage 16 communicates with the retard hydraulic chambers 12 and 13 via oil passages 18 and 19, and communicates with a hydraulic chamber (not shown) via an oil passage 20. The oil passage 17 communicates with the advance hydraulic chambers 14 and 15 by oil passages 22 and 23. The oil passage 24 communicates with an oil passage 25 formed in the cam shaft 2 at an axial contact portion between the support member 7c and the cam shaft 2, and the oil passage 16 is connected to the support member 7c. It communicates with the oil passage 24 at an axial contact portion with the cylindrical protrusion 9. The oil passage 17 communicates with an oil passage (not shown) formed in the cam shaft 2 at an axial contact portion between the support member 7 c and the cam shaft 2. 2 and vane opening 7 are rotatable coaxially with respect to chain sprocket 1, shroud housing 3 and front plate 4. In particular, the vane rotor 7 presses the showers 3 a and 3 b radially outward of the vane rotor 7 by the tip seal 27 attached to the groove 7 d formed on the outer peripheral wall of the support member 7 c. To maintain a concentric position with respect to the show housing 3.

By the way, in assembling the valve timing adjusting device having the above-described configuration to the engine body, the vane rod 7 is coaxially and relatively rotated with respect to the chain sprocket 1, the housing 1, and the front plate 4. After being movably mounted, they are often transported as engine parts to the engine body assembly workshop. During this transfer, an external force such as vibration acts on components such as the vane rotor 7.

However, if external force such as vibration during transportation acts against the biasing force of the tip seal 27 in the radial direction of the vane row 7, the above-mentioned There is a problem that the concentric position with respect to the like and the like is deviated, and the mounting property of the vane opening 7 on the camshaft 2 is deteriorated. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has been made in view of the above-mentioned circumstances. The purpose is to obtain the device. Disclosure of the invention

The present invention provides a housing integrally formed with a rotating member driven by a crankshaft of an engine, a case connected to the housing, and having a plurality of shoes protruding from an inner peripheral surface; A plurality of vanes protrudingly provided on the outer peripheral surface are rotatably accommodated in the first hydraulic chamber and the second hydraulic chamber, and a valve of an engine system is opened and closed. A valve timing adjusting device including a rotatable shaft that can be coaxially connected to a driving camshaft, wherein one of a contact surface between the mouth and the housing is provided in an axial direction of the rotor or the housing. A protruding portion is provided, and a concave portion for fitting with the protruding portion is provided on one of the other. As a result, the relative movement in the radial direction of the housing and the housing is regulated by the fitting of the projection and the recess. Therefore, the positional relationship between the case and the case connected to the housing can be restricted in the radial direction, so that even if an external force acts during transportation, the concentric position of the case with the case can be reliably maintained. It is possible to improve the mountability of the engine body to the camshaft.

Further, the present invention is characterized in that the convex portion and the concave portion are slidable along the axis of the rotor or the housing. Thus, the fitting between the convex portion and the concave portion can be easily performed, so that the assemblability of the valve adjusting device can be improved.

Further, according to the present invention, the protruding portion may be one of both ends in the axial direction of the rower. A first annular boss formed on the l-th boss portion provided on the rotor, and a first annular convex portion coaxial with the rotor, and a concave portion formed on a cover covering one of both axial end portions of the rotor; The first through hole is slidably fitted to the annular convex portion and is coaxial with the cover. As a result, relative movement of the cover and the mouth in the radial direction is restricted by the fitting of the first through hole and the first annular convex portion. Therefore, the positional relationship between the case connected to the cover and the rotor can be restricted in the radial direction, so that even when an external force acts during transport, the concentric position with respect to the case of the rotor can be reliably maintained. In addition, the mountability of the engine body to the camshaft can be improved.

Further, the present invention further includes a second annular boss formed on a second boss provided on the other of the axially opposite ends of the mouth and coaxial with the ridge, and a concave. Is formed in the housing, and is a second through-hole that is slidably fitted to the second annular projection and is coaxial with the housing. As a result, in addition to restricting the positional relationship between the case and the mouth, the relative movement of the rotor and the housing in the radial direction is also restricted by the engagement between the second annular projection and the second through hole. Therefore, even when an external force is applied during transport, the concentric position of the rotor with respect to the housing can be more reliably maintained, and the mountability of the engine body to the camshaft can be improved.

Further, the present invention provides a housing integrally formed with a rotating member driven by a crankshaft of an engine, a case connected to the housing and having a plurality of shoes protruding from an inner peripheral surface thereof, A plurality of vanes rotatably housed in the case and projecting from the outer peripheral surface partition the plurality of shoes into a first hydraulic chamber and a second hydraulic chamber, and open and close an engine system valve. A port that can be coaxially connected to the driving camshaft A cover that covers one of both axial end faces of the bracelet; and a cover located on the opposite side to the mouth and the case with the cover as a reference, and In a valve timing adjusting device provided with a biasing means for biasing the rotor in one of an advancing direction and a retarding direction, the valve timing adjusting device is provided with one of a contact surface between the mouth and the housing. A convex portion protruding in the axial direction of the housing or the housing is provided, and a concave portion that fits with the convex portion is provided on one of the contact surfaces, and a part of the convex portion is It is a fixed end of the urging means. As a result, the relative movement in the radial direction of the housing and the housing is restricted by the fitting of the projections and the recesses, so that even when an external force is applied during transportation, the housing and the housing are concentrically positioned. It can be held, and the mountability of the engine body to the camshaft can be improved. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a longitudinal sectional view showing a conventional vane type valve timing adjusting device.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is a longitudinal sectional view showing a main part of the valve timing adjusting device according to Embodiment 1 of the present invention.

FIG. 4 is a sectional view taken along the line IV-IV in FIG.

Figure 5 is Ru sectional view showing an enlarged portion and a V ₂ parts of Figure 4.

FIG. 6 is a longitudinal sectional view showing a main part of a valve timing adjusting device according to Embodiment 2 of the present invention.

FIG. 7 is a longitudinal sectional view showing a main part of a valve timing adjusting device according to Embodiment 3 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, in order to explain this invention in greater detail, the preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Embodiment 1.

FIG. 3 is a longitudinal sectional view showing a main part of the valve timing adjusting device according to Embodiment 1 of the present invention, FIG. 4 is a sectional view taken along line IV-IV of FIG. 3, and FIG. an enlarged E portion and V ₂ parts of FIG. 4 is a cross-sectional view illustrating. Note that among the components of the valve timing adjustment device according to the first embodiment, those that are common to the components of the conventional valve timing adjustment device shown in FIG. 1 and FIG. Description of the part is omitted.

In the figure, reference numeral 30 denotes a timing pulley as a rotating member driven in synchronization with the rotation of the engine via an endless belt (not shown), and 31 is formed integrally with the evening pulley 30. It is a substantially disk-shaped housing. A through hole 32 is formed in the center of the housing 31 to allow the cam shaft 2 to fit therethrough. Between the housing 31 and the front plate 4, a shoe housing 33 as a case and a van roe 34 accommodated in the shower housing 33 are provided. The inner wall of the housing 33 is provided with four screws 33a, 33b, 33c and 33d, and the outer surface of the vanro 34 is provided with four vanes 334. 4a, 34b, 34c and 34d are provided. Vane 34a is accommodated in the fan-shaped space between the buses 33a and 33b, and the fan-shaped space between the buses 33b and Vane 34b is accommodated, and fan 34c is accommodated in the fan-shaped space between show 33c and show 33d. Between 3 a o The fan space accommodates vanes 34d.Vanes 34a, 34b, 34c and 34d respectively use the fan spaces described above as retard hydraulic chambers as the first hydraulic chamber. 3 5 and an advanced hydraulic chamber 36 as a second hydraulic chamber. The adjacent retard hydraulic chamber 3 5 and advance hydraulic chamber 3 6 are connected to each other by 3 1 a, 3 3,

Tip seals 3 7 attached to 3 c and 3 3 d tips and tip seals 3 attached to vanes 3 4 a, 3 4 b, 3 4 c and 3 4 d tips 8 prevents communication between them. Numeral 39 denotes a backspring for abutting the chip seal 37 on the outer peripheral surface of the vane 34. A similar backspring (not shown) is attached to the tip seal 38. I have.

In FIG. 4, reference numeral 40 denotes a plunger slidably disposed in the hole 31a of the housing 31 along the axial direction, and reference numeral 41 denotes a plunger disposed in the hole 31a of the housing 31. And the plunger 40 is engaged with the vent hole 34

4 3 is a spring biasing into 2 and 4 3 is a plunger oil passage for supplying oil to the inside of the engagement hole 4 2 of the vacuum pump 34 or discharging oil from the engagement hole 4 2. . When the hydraulic pressure is not supplied to the plunger oil passage 43, the plunger 40 is engaged in the engagement hole 42 of the vanes 34 by the urging force of the spring 41. The relative rotation between the vane and the housing 31 is restricted. Conversely, when hydraulic pressure is supplied to the plunger oil passage 43, the hydraulic pressure retreats the plunger 40 against the urging force of the spring 41 and disengages from the engagement hole 42 of the vane rotor 34. Therefore, the regulation of the relative rotation between the vanes 3 and the housing 31 is released. Reference numeral 44 denotes a first oil passage provided in the camshaft 2, which communicates with a retard hydraulic chamber 35 for moving the vane roller 34 in the retard direction. Reference numeral 45 denotes a second oil passage provided in the camshaft 2, which communicates with an advance hydraulic chamber 36 for moving the vane rod 34 in the advance direction. In FIG. 5, reference numeral 46 denotes a shaft formed on the contact surface of the housing 34 with the housing 31 so as to be coaxial with the vane opening 34 and the shaft of the housing 34. 4 7 are formed in the through hole 3 2 of the housing 3 1 on the side of the contact surface with the vane roll 3 4 of the housing 3 1, and are formed coaxially with the housing 3 1. This is a concave portion for fitting with the convex portion 46. The inner peripheral surface 4 7 a of the concave portion 4 7 and the outer peripheral surface 4 6 a of the convex portion 4 6 are combined with the outer peripheral surface 4 4 It is slidable along the axial direction, and the van roe 34 and the housing 31 are relatively rotatable. The front plate 4, the housing 33, and the housing 31 are integrally fixed by bolts 5.

Further, a fixing recess 48 for fixing the front end 2a of the cam shaft 2 is provided at the center of the projection 46 of the ventilator 34, and the fixing recess 48 is formed. The opening is formed with an inclined portion 48a for guiding the tip 2a when the camshaft 2 is attached.

Next, a method of assembling the valve timing adjustment device to the engine body will be described.

First, the vanes 34 are housed in the housing 33, and the front plate 4 is attached to the front ends of the housings 33 and the vanes 34. Next, when the vanes 34 are brought into contact with the housing 31, the projections 46 of the vanes 34 are fitted into the recesses 47 of the housing 31, and assembled as engine parts. These parts are transported to the engine assembly assembly site. Here, the convex portion 46 and the concave portion 4 7 are slidable along the axial direction of the vanro 34, and the vano 34 and the housing 31 are relatively rotatable. On the other hand, the fitting of the convex portion 46 and the concave portion 47 restricts the movement of the van roe 34 in the semi-suspicious direction. Therefore, transport ^ Even if the external force at the time acts against the biasing force of the tip seals 37 and 38 in the radial direction of the vane rod 34, the vane rod Since the displacement of the concentric position of 34 with respect to the housing 31 can be reliably prevented, the mountability of the above-described vane 34 to the cam shaft 2 can be remarkably improved. Next, in the engine body assembling work place, the front end 2a of the cam shaft 2 is inserted into the through hole 32 of the housing 31. At this time, the tip 2a of the camshaft 2 is inserted into the fixing recess 48 of the vane 34 attached coaxially to the housing 31, but the camshaft 2 is inserted by the inclined portion 48a. The tip 2a is securely guided into the fixing recess 48, and is coaxially fixed to the vane 34 by a bolt 49.

Next, the operation will be described.

First, when the cam shaft 2 is retarded with respect to the rotation direction of the timing pulley 30, the advance hydraulic chamber 36 divided by vanes 34a, 34b, 34c and 34d is used. The oil is supplied from a hydraulic pressure supply source (not shown) to one of the retard hydraulic chambers 35 and the hydraulic oil supply source (not shown), and the oil is discharged from the other advanced hydraulic chamber 36. First, rotation is performed by utilizing the hydraulic pressure difference between both sides of 34a, 34b, 34c and 34d. At this time, when the evening pulley 30 is rotated, the plunger 40 urged to the camshaft 2 side by the spring 41 is inserted into the engagement hole 42 of the vane roll 34, and the vane roll is pulled. The relative rotation between the camshaft 2 and the evening pulley 30, which is fixedly connected to the night 34, is restricted.

As described above, in the first embodiment, by fitting the convex portion 46 provided on the vane tube 34 along the axial direction with the concave portion 47 provided on the housing 31, the vane tube 34 is fitted. To maintain the concentric position with respect to the housing 3 1 There is an effect that the property can be significantly improved.

In the first embodiment, the concave portion is provided on the housing 31 side and the convex portion is provided on the vane rotor 34 side, but the relative rotation between the housing 31 and the vane opening 34 is restricted. Alternatively, the projection may be provided on the housing 31 side, and the recess may be provided on the vane 34 side. In this case as well, it is possible to reliably prevent the concentric position of the vane opening 34 with respect to the housing 31 from being shifted, so that the vane opening 34 can be mounted on the cam shaft 2. Can be significantly improved. Embodiment 2

FIG. 6 is a longitudinal sectional view showing a main part of a valve timing adjusting device according to Embodiment 2 of the present invention. Among the components of the valve timing adjustment device according to the second embodiment, those common to the components of the valve timing adjustment device according to the first embodiment shown in FIGS. 3, 4, and 5 are described. Are denoted by the same reference numerals, and descriptions of those portions are omitted.

The feature of the second embodiment is that, in the same manner as in the first embodiment, the valve timing adjusting device of the type attached to the intake side of the engine has a front play other than the engagement of the vane and the housing 34 with the housing 31. The point is that it also engages with G4. That is, the convex portion 46 of the vane belt 34 is formed as a single boss portion (first boss portion) that protrudes larger than in the first embodiment, and penetrates the concave portion 47 of the housing 31. are doing. The outer peripheral surface 46 a of the convex portion 46 and the inner peripheral surface 47 a of the concave portion 47 can slide in the axial direction of the vane rotor 34, and the vane opening 34 and the housing 3 can be slid. It can rotate relative to 1.

In the center of Vanero 34, a cylindrical protrusion 50 as another boss (second boss) protrudes along the axial direction at a position opposite to the protrusion 46. The through-hole 51 is formed at the center of the front plate 4. The outer peripheral surface 50 a of the convex portion 50 and the inner peripheral surface 51 a of the through hole 51 can slide along the axial direction of the vanes 34, and the vane mouths can be slid. The front plate 4 and the front plate 4 are relatively rotatable. Note that the front plate 4, the housing 33, and the housing 31 are integrally fixed by bolts 5.

Thus, in the second embodiment, the convex portion 46 of the vane ring 34 is fitted into the concave portion 47 of the housing 31, and the convex portion 50 of the vane line 34 is connected to the front plate 4. It is said that the concentric position with respect to the housing 31 and the front plate 4 of the ventilator 34 can be maintained more reliably than in the first embodiment because the through hole 51 is fitted into the through hole 51. Has the effect. Embodiment 3.

FIG. 7 is a longitudinal sectional view showing a main part of a valve timing adjusting device according to Embodiment 3 of the present invention. The components of the valve timing adjustment device according to the third embodiment are the same as the components of the valve timing adjustment device according to the first or second embodiment shown in FIGS. 3 to 6 shown in FIGS. The same components are denoted by the same reference numerals, and the description of those portions is omitted.

The feature of the third embodiment is that the two bosses of the vane rotor 34 are respectively engaged with the housing 31 and a unit cover described later in the valve timing adjustment device of the type mounted on the exhaust side of the engine. You. That is, the convex portion 46 provided on one end surface in the axial direction of the vane ring 34 is fitted into the concave portion 47 of the housing 31. In addition, the convex portion 50 of the vane pan 34 is in the axial direction of the housing 33 and the vane port 34. The first plate 52 attached to the other end face of the first plate 52 and the second through hole 53 attached to the surface of the first plate 52 are respectively formed with the first through-holes 52 a formed coaxially at the center of each. And the second through hole 53a. The first plate 52 and the second plate 53 are fixed to the housing 31 and the vanes 34 by bolts 54. The outer edge of the first plate 52 is bent in the direction opposite to the side of the bottom plate 34, and the bent portion 52b holds the cover member 55 with the second plate 53 interposed therebetween. are doing. The cover member 55 has a third through-hole 55 a through which a bolt 56 for coaxially fixing the vane lock 34 and the cam shaft 2 is provided at the center thereof. Enclose the hole 55a and extend the vents 34a, 34b, 34b, 34b, 34c and 34d in the advance or retard direction with respect to the housing 33. It has a housing portion 55b for housing a spring 57 as a biasing means for biasing the spring. The spring 57 is a projection 50 of the vane roll 34 fitted to the first through hole 52a of the first plate 52 and the second through hole 53a of the second plate 53, respectively. It is wound around the outer periphery. The fixed end 57 a of the spring 57 is in contact with the notch 50 b of the projection 50 of the bellows 34, and the top 50 c of the projection 50 is a cover member. 55 is in contact with the inner peripheral edge of the third through hole 55a. The first plate 52, the second plate 53, and the cover member 55 constitute a unit cover 58. In FIG. 7, reference numeral 59 denotes a holder for positioning a spring 41 for urging a plunger 40 for restricting the relative rotation between the housing 33 and the vane rod 34.

As described above, in the third embodiment, the convex portion 46 of the vane rotor 34 is fitted into the concave portion of the housing 31, and the convex portion 50 of the vane rotor 34 is connected to the unit cover 58 in the unit cover 58. The first through hole 52a of the first plate 52 and the second through hole 53a of the second plate 53 are fitted respectively. Therefore, there is an effect that the concentric position of the vanes 34 can be maintained with respect to the housing 31 and the unit cover 58.

In the third embodiment, the fixed end 57 a of the spring 57 is brought into contact with the notch 5 Ob of the convex portion 50 of the bellows 34, and the biasing force of the spring 57 is Is made to act on the vane roll 34, so that there is also an effect that it is possible to prevent the above-mentioned two fitting portions from coming off in the axial direction of the component members. Industrial applicability

As described above, the valve timing adjustment device according to the present invention regulates the positional relationship between the rotor and the housing and the positional relationship between the opening and the cover in the radial direction, thereby reducing the time between the case and the housing. The concentric position can be maintained, and the mountability to the camshaft can be improved.

Claims

Range of request

1. A housing integrally formed with a rotating member driven by a crankshaft of the engine, a case connected to the housing and having a plurality of shoes protruding from the inner peripheral surface, and a rotating member inside the case. A plurality of vanes are movably accommodated and project from the outer peripheral surface to form a blue

A valve timing adjustment device having a rotor partitioned into a hydraulic chamber and a second hydraulic chamber and coaxially connectable to a camshaft that opens and closes a valve of an engine system.

A convex portion protruding in the axial direction of the port or the housing is provided on one of the contact surfaces of the port and the housing, and a concave portion fitted with the convex portion is provided on one of the other. A valve evening adjusting device that is provided.

2. The valve timing control according to claim 1, wherein the convex portion and the concave portion are slidable over the mouth or along the axial direction of the housing.

3. The convex portion is a first annular convex portion formed on a first boss provided on one of both ends in the axial direction of the rotor and coaxial with the rotor, and the concave portion is a shaft of the rotor. A first through-hole formed on a cover that covers one of both end portions in the direction, slidably fitted to the first annular convex portion, and coaxial with the cover. Valve timing adjustment device

4. The protruding part is formed on the second boss part provided at the other end of the mouth in the axial direction. And a concave portion is formed in the housing, and the concave portion is formed in a housing, and is slidably fitted to the second annular convex portion and coaxial with the eight housing. 4. The valve timing adjusting device according to claim 3, wherein the valve timing adjusting device is a second through hole.

5. A housing integrally formed with a rotating member driven by the crankshaft of the engine, a case connected to the housing and having a plurality of shoes protruding from the inner peripheral surface, and a rotating case inside the case. A plurality of vanes movably housed and projecting from the outer peripheral surface partition the plurality of shoes into a first hydraulic chamber and a second hydraulic chamber, and a camshaft for driving a valve of an engine system to open and close. A cover that can be coaxially connected, a cover that covers one of both axial end surfaces of the rotor, a cover that is located on the opposite side of the mouth and the case with respect to the case, and A valve timing adjusting device comprising: a biasing means for biasing the evening in either the advance direction or the retard direction.

A protrusion protruding in the axial direction of the mouth or the housing is provided on one of the contact surfaces between the mouth and the housing, and the protrusion is provided on the other of the contact surfaces. And a concave portion that fits with the pressure adjusting member, and a part of the convex portion is a fixed end of the urging means.