JP6290749B2 - Rush adjuster - Google Patents

Description

  The present invention relates to a lash adjuster.

  The lash adjuster disclosed in Patent Document 1 is a cylindrical body (referred to as a cylinder in Patent Document 1) that is inserted into the mounting hole of the cylinder head, and is inserted into the body so as to be reciprocally movable in the axial direction (vertical direction). And a check valve portion (referred to as a valve body, a valve port or the like in Patent Document 1) provided on the bottom wall of the plunger. A low pressure chamber is provided in the plunger, and a high pressure chamber defined by the bottom wall of the plunger is provided in the body. Also, body oil holes (referred to as external communication holes in Patent Document 1) are provided in the peripheral wall of the body, and plunger oil holes (referred to as internal communication holes in Patent Document 1) are provided in the peripheral wall of the plunger. Yes.

  After the lash adjuster is assembled to the cylinder head, oil is supplied from the oil supply hole (referred to as a hydraulic oil supply passage in Patent Document 1) that opens to the inner surface of the mounting hole to the low pressure chamber through the body oil hole and the plunger oil hole in order (Patent Document 1 is called hydraulic oil), and oil is supplied from the low pressure chamber to the high pressure chamber through a check valve. When the internal combustion engine is operated, the plunger reciprocates in the body based on the oil pressure and the spring that flows between the low pressure chamber and the high pressure chamber, so that the rocker arm supported by the plunger has a clearance between the valve and the valve. It is adjusted not to occur.

Japanese Patent Laid-Open No. 2004-211585

  By the way, in the above case, relative rotation of the body with respect to the cylinder head is allowed so that the sliding area between the cylinder head and the body and between the body and the plunger is not limited to a specific range. Rotation is also allowed. For this reason, as shown in FIG. 13, if the lash adjuster 1 is disposed to be inclined so as to approach the horizontal direction, the internal combustion engine (automobile engine or the like) is stopped and the plunger 2 is connected to the body 3. When pushed into the bottom wall 4 side, the body oil hole 5 and the plunger oil hole 6 may communicate with each other and both may open downward. As described above, when both the body oil hole 5 and the plunger oil hole 6 are opened downward, the amount of oil stored in the low pressure chamber 7 is extremely reduced. Oil may not be sufficiently supplied to 8 and air may be caught in the high-pressure chamber 8. In view of this, for example, if a tall pipe (not shown) is assembled in the plunger 2 so that the oil amount of the oil is secured in the entire internal volume of the pipe, the air is caught in the high pressure chamber 8. Can be prevented. However, the operation of assembling the pipe in the plunger 2 tends to be complicated, and the plunger 2 must be made into a two-divided structure so that the pipe can be assembled.

  The present invention has been completed based on the above situation, and provides a lash adjuster capable of preventing air from entering the high pressure chamber without greatly changing the conventional structure. With the goal.

1st of this invention is equipped with the cylindrical body inserted in the attachment hole of a cylinder head, and the cylindrical plunger which is inserted in the said body and can reciprocate to an axial direction. A high pressure chamber defined by the bottom wall of the plunger is provided in the body, and the bottom wall of the plunger is a check that allows oil to flow from the low pressure chamber to the high pressure chamber. A valve portion is provided, a body oil hole is provided in the peripheral wall of the body, a plunger oil hole is provided in the peripheral wall of the plunger, and the body is formed from an oil supply hole that opens on an inner surface of the mounting hole of the cylinder head. A lash adjuster in which oil is supplied to the low pressure chamber sequentially through an oil hole and the plunger oil hole, and further oil is supplied from the low pressure chamber to the high pressure chamber through the check valve portion. Each of said body side and said plunger side, the body fluid hole and the plunger oil hole and can be opened in different directions that the oil hole position adjustment portion is provided, the oil hole position adjustment section The plunger and the plunger are brought into contact with each other when the plunger is pushed toward the bottom wall side of the body by stopping the internal combustion engine, thereby rotating the body and the plunger relative to each other so that the body oil hole and the plunger oil hole are It is characterized in that it is set to open in different directions .
A second aspect of the present invention includes a cylindrical body that is inserted into the mounting hole of the cylinder head, and a cylindrical plunger that is inserted into the body and is capable of reciprocating in the axial direction. A high pressure chamber defined by the bottom wall of the plunger is provided in the body, and the bottom wall of the plunger is a check that allows oil to flow from the low pressure chamber to the high pressure chamber. A valve portion is provided, a body oil hole is provided in the peripheral wall of the body, a plunger oil hole is provided in the peripheral wall of the plunger, and the body is formed from an oil supply hole that opens on an inner surface of the mounting hole of the cylinder head. A lash adjuster in which oil is supplied to the low pressure chamber sequentially through an oil hole and the plunger oil hole, and further oil is supplied from the low pressure chamber to the high pressure chamber through the check valve portion. In addition, each of the body side and the plunger side is provided with an oil hole position adjusting unit capable of opening the body oil hole and the plunger oil hole in different directions, and the oil hole position adjusting unit is The plunger and the body are characterized in that they are provided so as to face the high-pressure chamber in the bottom face portions facing each other in the axial direction.

When the lash adjuster is tilted because the oil hole position adjustment part that can open the body oil hole and the plunger oil hole in different directions is provided on each of the body side and the plunger side In addition, neither the body oil hole nor the plunger oil hole opens downward. Therefore, a predetermined amount of oil can be secured in the low pressure chamber, and air can be prevented from being caught in the high pressure chamber when the oil flows from the low pressure chamber to the high pressure chamber. In addition, it is only necessary to provide oil hole position adjusting portions on the body side and the plunger side, and the oil hole position adjusting portion does not have a particularly complicated structure, so there is no need to greatly change the conventional structure. Excellent versatility.
According to the first aspect of the present invention, the relative rotation of the plunger with respect to the body is not restricted.
According to the second aspect of the present invention, since the oil hole position adjusting portion is provided in a range that can be accommodated in the high pressure chamber, it is possible to prevent the lash adjuster from becoming large. Further, since the oil hole position adjusting portion is provided, the structure of the lash adjuster is not particularly complicated.

FIG. 5 is an enlarged cross-sectional view illustrating a state in which the lash adjuster is assembled to the cylinder head and the plunger is pushed down to the lowest position in the body according to the first embodiment of the present invention. FIG. 2 is a view corresponding to FIG. 1 in which the direction in which the plunger oil hole opens is different. It is sectional drawing which shows the state in which a plunger reciprocates within the body. It is sectional drawing which shows the state in which the plunger was pushed down and the plunger oil hole position adjustment part and the body oil hole position adjustment part contact | abutted mutually. It is sectional drawing which shows the state which the plunger was pushed in to the lowest part in the body and the plunger oil hole position adjustment part and the body oil hole position adjustment part faced each other and contacted. It is sectional drawing which shows the state in which the lash adjuster was assembled | attached to the cylinder head. It is sectional drawing of a body. It is a front view of a plunger. It is a principal part expanded sectional view of the lash adjuster which concerns on Example 2 of this invention. It is sectional drawing which concerns on Example 3 of this invention, and shows the state in which the plunger was pushed down and the insertion part was inserted deeply in the receiving part. It is sectional drawing of a plunger. It is sectional drawing of a body. It is sectional drawing of the lash adjuster which concerns on a prior art example.

Preferred embodiments of the present invention are shown below .

In the first aspect of the present invention, among the oil hole position adjusting parts on the body side and the plunger side, at least one of the oil hole position adjusting parts is a slope inclined in a direction intersecting the axial direction. It is configured. According to this, relative rotation between the body and the plunger is smoothly guided by the slope. Further, if the oil hole position adjusting portion is a slope, separate parts are not required, and the structure can be avoided from becoming complicated.

2nd of this invention WHEREIN: The said oil hole position adjustment part consists of the insertion part provided in any one of the said plunger side and the said body side, and the receiving part provided in the other, The said insertion part is the said The body oil hole and the plunger oil hole are set to open in different directions while being inserted in the receiving portion in the axial direction. Since the body oil hole and the plunger oil hole may be set to open in different directions with the insertion part inserted in the receiving part in the axial direction, the dimensional management of the insertion part and the receiving part is compared. Can be done roughly.

In the first and second aspects of the present invention, the oil hole position adjusting portion is provided so that the body oil hole and the plunger oil hole open on opposite sides. As described above, if the body oil hole and the plunger oil hole are opened on the opposite sides, a predetermined amount of oil can be reliably stored in the low-pressure chamber, and the reliability of preventing air entrapment is improved. be able to.

<Example 1>
A first embodiment of the present invention will be described with reference to FIGS. The lash adjuster 10 according to the first embodiment is provided in a valve operating apparatus for an internal combustion engine. As shown in FIG. 6, the valve gear includes a valve 70, a rocker arm 80, and a cam 90 in addition to the lash adjuster 10.

  As shown in FIG. 6, the lash adjuster 10 and the valve 70 are incorporated in the cylinder head 60. On the surface of the cylinder head 60, a mounting hole 61 having a circular cross section through which the lash adjuster 10 can be inserted is provided. An oil supply hole 62 is opened on the inner peripheral surface of the mounting hole 61 of the cylinder head 60. In this case, the lash adjuster 10 and the valve 70 are inclined and arranged in an inclined posture close to a horizontal posture. The rocker arm 80 is supported by the lash adjuster 10 and the valve 70 at both ends in the length direction, and the intermediate portion in the length direction is in contact with the cam 90 via the roller 81.

  When the cam 90 rotates, the rocker arm 80 swings with a support portion 25 (to be described later) of the lash adjuster 10 as a fulcrum, so that the valve 70 reciprocates in the axial direction to open and close the air passage 63 (intake port or exhaust port). It has become. Since the valve operating device itself has a known structure, further explanation is omitted.

Next, the lash adjuster 10 will be described. As shown in FIG. 3, the lash adjuster 10 includes a body 11 and a plunger 12.
As shown in FIG. 7, the body 11 has a bottomed cylindrical shape, and includes a circular bottom wall 13 and a peripheral wall 14 protruding upward from the outer peripheral edge of the bottom wall 13. The body 11 is inserted into the mounting hole 61 of the cylinder head 60. A projecting annular step 15 is provided on the inner peripheral surface of the lower end of the peripheral wall 14 of the body 11. The step portion 15 is provided over the entire inner peripheral surface of the peripheral wall 14 of the body 11 and is integrally connected to the bottom wall 13 of the body 11. The upper end of the step portion 15 is a body oil hole position adjusting unit 16 described later, and can be brought into contact with a plunger oil hole position adjusting unit 36 described later in the vertical direction.

  A body oil hole 17 is provided through the peripheral wall 14 of the body 11. Further, a body annular groove 18 is provided on the outer peripheral surface of the peripheral wall 14 of the body 11 so as to circulate in a belt shape over the entire periphery. The body oil hole 17 opens in the groove inner surface of the body annular groove 18. As shown in FIG. 2, when the body 11 is inserted into the mounting hole 61 of the cylinder head 60, the body oil hole 17 communicates with the oil supply hole 62 through the body annular groove 18. In this case, as shown in FIGS. 1 and 2, the circumferential insertion position of the body 11 in the mounting hole 61 is not fixed, and the positional relationship between the body oil hole 17 and the oil supply hole 62 becomes indefinite. However, the state in which the body oil hole 17 communicates with the oil supply hole 62 can be ensured through the body annular groove 18.

  As shown in FIGS. 3 and 8, the plunger 12 has a bottomed cylindrical shape, a circular bottom wall 19, a peripheral wall 21 protruding upward from the outer peripheral edge of the bottom wall 19, and an outer peripheral edge of the bottom wall 19. And a ridge portion 22 projecting downward from the projection. The protruding amount of the protruding portion 22 from the bottom wall 19 is sufficiently smaller than the protruding amount of the peripheral wall 21 from the bottom wall 19, and the outer peripheral surface of the protruding portion 22 is continuous with the outer peripheral surface of the peripheral wall 21 without a step. ing. The plunger 12 is inserted into the body 11 so as to be rotatable around an axis. The inside of the plunger 12 is a hollow low-pressure chamber 23. A valve port 24 having a circular cross section is provided in the center of the bottom wall 19 of the plunger 12 so as to penetrate in the axial direction.

  A support portion 25 is provided at the upper end of the plunger 12 so as to protrude in a substantially hemispherical shape. A rocker arm 80 is in contact with and supported by the outer surface of the support portion 25 of the plunger 12, and a rocking fulcrum of the rocker arm 80 is configured by the support portion 25. A through hole 26 having a circular cross section is provided at the center of the upper end of the support portion 25.

  A plunger oil hole 27 is provided through the peripheral wall 21 of the plunger 12. In the state where the plunger 12 is inserted into the body 11, the plunger oil hole 27 is disposed above the body oil hole 17. A plunger annular groove 28 is provided on the outer peripheral surface of the peripheral wall 21 of the plunger 12 so as to circulate in a belt shape over the entire periphery. The plunger oil hole 27 opens in the groove inner surface of the plunger annular groove 28. When the plunger 12 is inserted into the body 11, the plunger oil hole 27 communicates with the body oil hole 17 via the plunger annular groove 28. In this case, although the circumferential insertion position of the plunger 12 in the body 11 is not fixed, it is ensured that the plunger oil hole 27 communicates with the body oil hole 17 through the plunger annular groove 28. Can do. As shown in FIG. 3, the outer peripheral surface of the peripheral wall 21 of the plunger 12 is slidably contactable with the inner peripheral surface of the peripheral wall 14 of the body 11 on both axial sides (upper and lower sides) sandwiching the plunger annular groove 28. A contact surface 29 is provided.

  A high pressure chamber 31 is provided at the bottom of the body 11 and is partitioned from the low pressure chamber 23 by the bottom wall 19 of the plunger 12. The outer periphery of the high pressure chamber 31 is partitioned by the inner peripheral surface of the peripheral wall 14 of the body 11, the inner peripheral surface of the step portion 15, and oil hole position adjusting portions 16 and 36 described later. A spherical valve body 32 is provided in the high pressure chamber 31. The valve body 32 is urged in a direction to close the valve port 24 by a first spring (not shown). The valve body 32 is accommodated in the cage 33, and the first spring is mounted between the cage 33 and the valve body 32. A second spring 34 is mounted between the cage 33 and the bottom wall 13 of the body 11, and the second spring 34 urges the plunger 12 upward together with the cage 33. The upper end edge of the second spring 34 is hooked on the inner side of a locking step 35 formed in a substantially L-shaped cross section from the bottom wall 19 of the plunger 12 to the ridge 22. In addition, the check valve part of the present invention is constituted by the valve body 32, the valve port 24, and the like.

  In a state where the lash adjuster 10 is inserted into the mounting hole 61 of the cylinder head 60, the lash adjuster 10 flows from the oil supply hole 62 of the cylinder head 60 through the body annular groove 18, the body oil hole 17, the plunger annular groove 28, and the plunger oil hole 27 sequentially. The oil is stored in the low pressure chamber 23 and further filled into the high pressure chamber 31 through the valve port 24.

  When the internal combustion engine (such as an automobile engine) is operated, the rocker arm 80 swings according to the rotation of the cam 90, and a downward pressing force (downward in the axial direction) acts on the plunger 12 from the rocker arm 80 side. Then, the valve body 32 closes the valve port 24 to seal the inside of the high pressure chamber 31, and the plunger 12 is prevented from being lowered by the oil filled in the high pressure chamber 31. When the plunger 12 rises and the volume of the high-pressure chamber 31 increases, the valve body 32 descends relative to the plunger 12 to open the valve port 24, and oil passes from the low-pressure chamber 23 through the valve port 24 into the high-pressure chamber 31. The high pressure chamber 31 is kept filled with oil. When the plunger 12 stops its ascent, the valve body 32 is urged by the first spring to close the valve port 24, and the high pressure chamber 31 is sealed with oil.

  By the way, when the lash adjuster 10 is disposed at an inclination, when the plunger 12 is lowered due to the pressing force from the rocker arm 80 side, the body oil hole 17 and the plunger oil hole 27 are both at the same circumferential position. May open downward in a state of being aligned. If it does so, the oil level height of the oil prescribed | regulated by the body oil hole 17 and the plunger oil hole 27 will become low (refer FIG. 13), and sufficient oil cannot be stored in the low pressure chamber 23. FIG. For this reason, when the internal combustion engine is restarted, air is mixed with oil from the low pressure chamber 23 into the high pressure chamber 31, and so-called air entrapment may occur. However, in the case of the first embodiment, the lash adjuster 10 is provided with oil hole position adjusting portions 16 and 36 for preventing the body oil hole 17 and the plunger oil hole 27 from being aligned at the same position in the circumferential direction. The oil hole position adjusters 16 and 36 prevent air from being caught in the high pressure chamber 31.

  The oil hole position adjusting units 16 and 36 include a plunger oil hole position adjusting unit 36 provided in the plunger 12 and a body oil hole position adjusting unit 16 provided in the body 11. As shown in FIG. 8, the plunger oil hole position adjusting portion 36 is configured by the lower end surface of the protruding portion 22 that is the lowermost end (bottommost position) of the plunger 12. Specifically, the plunger oil hole position adjusting portion 36 is an inclined surface inclined at a constant inclination angle along the direction intersecting the axial direction and the radial direction on the lower end surface of the protruding portion 22. More specifically, the plunger oil hole position adjusting portion 36 is formed so as to have an upward slope in a tapered shape with a gentle inclination from one end to the other end in the radial direction of the ridge portion 22, and the ridge portion 22 in the circumferential direction. The plunger oil hole 27 is provided at the same position as the other end in the radial direction (the upper end in the inclination direction of the plunger oil hole position adjusting portion 36). For this reason, the protrusion amount from the bottom wall 19 of the plunger 12 is smaller in the portion corresponding to the other end in the radial direction in the protrusion 22 than in the portion corresponding to the one end in the radial direction.

  As shown in FIG. 7, the body oil hole position adjusting unit 16 is configured by the upper end surface of the step portion 15 of the body 11. Specifically, the body oil hole position adjusting portion 16 is a slope inclined at a constant inclination angle along the direction intersecting the axial direction and the radial direction on the upper end surface of the step portion 15. More specifically, the body oil hole position adjusting portion 16 is formed so as to be gradually inclined from one end to the other end in the radial direction of the step portion 15 so as to have an ascending slope, and the diameter of the step portion 15 in the circumferential direction. A body oil hole 17 is provided at the same position as one end in the direction (the lower end in the tilt direction of the body oil hole position adjusting portion 16). For this reason, the protrusion amount (height) from the bottom wall 13 of the body 11 is smaller in the portion corresponding to one end in the radial direction in the step portion 15 than in the portion corresponding to the other end in the radial direction. Note that the inclination angle of the body oil hole position adjustment unit 16 and the inclination angle of the plunger oil hole position adjustment unit 36 are substantially the same, and form an acute angle with a horizontal plane along the radial direction.

Next, the operation of the lash adjuster 10 of Example 1 will be described.
When the plunger 12 reciprocates in the axial direction with respect to the body 11 during operation of the internal combustion engine, the sliding contact surface 29 of the peripheral wall 21 of the plunger 12 slides on the inner peripheral surface of the peripheral wall 14 of the body 11 (see FIG. 3). At this time, the movement stroke of the plunger 12 with respect to the body 11 is ensured at a normal set value as in the conventional case.

  After the internal combustion engine is stopped, the plunger 12 is pushed by receiving a pressing force from the rocker arm 80 side, and gradually sinks to the bottom wall 13 side of the body 11. In the process in which the plunger 12 is pushed, the plunger oil hole position adjusting unit 36 comes into contact with the upper end of the body oil hole position adjusting unit 16 (see FIG. 4), and the plunger 12 is further pushed, whereby the plunger oil hole position adjusting unit 36 is pressed. Slides on the body oil hole position adjusting portion 16, and accordingly, the plunger 12 rotates relative to the body 11 around the axis. Thus, when the plunger 12 rotates relative to the axis, the plunger oil hole 27 and the body oil hole 17 gradually move away in the circumferential direction. Finally, the plunger 12 is pushed into the body 11 to the lowest position, and the plunger oil hole position adjustment unit 36 and the body oil hole position adjustment unit 16 face each other along the inclination direction of the oil hole position adjustment units 16 and 36. (See FIG. 5). Thereby, the plunger oil hole 27 and the body oil hole 17 are in a state of being positioned on opposite sides in the radial direction.

  For example, as shown in FIG. 1, when the body oil hole 17 is arranged to open downward in the mounting hole 61 of the cylinder head 60, the plunger oil hole 27 is arranged to open upward. . For this reason, at least oil whose oil level is higher than the height position of the body oil hole 17 is stored in the low pressure chamber 23, and the oil flows from the low pressure chamber 23 to the high pressure chamber 31 at the subsequent restart. At this time, air is prevented from being caught in the high pressure chamber 31.

  Further, for example, as shown in FIG. 2, when the body oil hole 17 is arranged to open upward in the mounting hole 61 of the cylinder head 60, the plunger oil hole 27 is arranged to open downward. become. At this time, since the opening of the plunger oil hole 27 is closed by the peripheral wall 14 of the body 11 via the plunger annular groove 28, the oil level height exceeding at least the height position of the plunger oil hole 27 is present in the low pressure chamber 23. In the same manner as described above, air is prevented from biting into the high pressure chamber 31. Accordingly, whatever the positional relationship between the cylinder head 60 and the body 11 and between the body 11 and the plunger 12 in the circumferential direction is sufficient to prevent the air from being caught in the low pressure chamber 23. A large amount of oil is stored.

  As described above, according to the first embodiment, when the plunger 12 is pushed downward (on the bottom wall 13 side of the body 11), the oil hole position adjusting portions 16 and 36 of the body 11 and the plunger 12 contact each other. Since the body oil hole 17 and the plunger oil hole 27 are opened in different directions due to contact (sliding contact), the body oil hole 17 is also provided when the lash adjuster 10 is inclined. Neither the plunger hole 27 nor the plunger oil hole 27 opens downward. Therefore, sufficient oil can be secured in the low pressure chamber 23, and air can be prevented from being caught in the high pressure chamber 31 when the oil flows from the low pressure chamber 23 to the high pressure chamber 31. In addition, since the oil hole position adjusting parts 16 and 36 need only be provided at positions where the body 11 and the plunger 12 abut each other in the axial direction, the conventional structure does not need to be greatly changed, and the versatility is excellent. .

  In the case of the first embodiment, since both the plunger oil hole position adjusting unit 36 and the body oil hole position adjusting unit 16 are configured as slopes, when the plunger 12 is pushed downward, the body 11 and the plunger Relative rotation with 12 is smoothly guided. Further, if the plunger oil hole position adjusting unit 36 and the body oil hole position adjusting unit 16 are both inclined surfaces, separate parts are unnecessary, and the structure can be avoided from becoming complicated.

  Further, since the oil hole position adjusting portions 16 and 36 are provided so that the body oil hole 17 and the plunger oil hole 27 are opened to the opposite sides when the internal combustion engine is stopped, a predetermined amount is provided in the low pressure chamber 23. Oil can be reliably stored, and the reliability of preventing air entrapment can be improved.

  Furthermore, the oil hole position adjusting parts 16 and 36 are provided so as to face the high pressure chamber 31 at the bottom surface portions where the plunger 12 and the body 11 face each other in the axial direction, that is, the oil hole position adjusting parts 16 and 36 are provided in the high pressure chamber. Since the lash adjuster 10 is provided in a range that falls within the range 31, the lash adjuster 10 can be prevented from becoming large.

<Example 2>
FIG. 9 shows a second embodiment of the present invention. The lash adjuster 10A according to the second embodiment is different from the first embodiment in the body oil hole position adjusting unit 16A, but is substantially the same as the first embodiment except for the body oil hole position adjusting unit 16A. Therefore, in the second embodiment, the same reference numerals are given to structures that are the same as or correspond to those in the first embodiment, and redundant description is omitted.

  The entire upper end surface of the step portion 15 of the body 11 is a horizontal plane, and unlike the first embodiment, the upper end surface itself is not the body oil hole position adjusting portion 16A. The step portion 15 is provided with a concave portion 37 that is cut out from the upper end surface to the inner peripheral surface. The concave portion 37 is disposed at the other end portion in the radial direction of the step portion 15, which is a position opposite to the body oil hole 17 in the circumferential direction.

  The body oil hole position adjusting unit 16 </ b> A is separate from the peripheral wall 14 and the bottom wall 13 of the body 11. Specifically, the body oil hole position adjusting portion 16 </ b> A is configured as a spherical raising member, and is fitted and held in the concave portion 37 of the step portion 15. The upper end (top end) of the body oil hole position adjusting portion 16 </ b> A is raised to a position higher than one end portion in the radial direction on the upper end surface of the step portion 15.

  In the case of the second embodiment, when the plunger 12 is pushed downward in the body 11 by receiving a pressing force from the rocker arm 80 side, the plunger oil hole position adjusting unit 36 is placed on the upper end (top end) of the body oil hole position adjusting unit 16A. Abut. When the plunger 12 is further pushed downward, the plunger oil hole position adjusting unit 36 slides on the upper end of the body oil hole position adjusting unit 16A, and the plunger 12 is rotated about the axis with respect to the body 11. When the plunger 12 reaches the lowermost portion in the body 11 in this way, the plunger oil hole position adjusting portion 36 is bridged between one end portion in the radial direction on the upper end surface of the step portion 15 and the upper end of the body oil hole position adjusting portion 16A. Arranged to be. At this time, the body oil hole 17 and the plunger oil hole 27 are positioned on opposite sides in the radial direction. For this reason, as in the first embodiment, a predetermined amount of oil can be secured in the low pressure chamber 23, and air can be prevented from biting into the high pressure chamber 31. Further, according to the second embodiment, since it is not necessary to perform complicated processing such as cutting the body oil hole position adjusting portion inside the body 11, the workability is excellent.

<Example 3>
10 to 12 show a third embodiment of the present invention. In the lash adjuster 10B of the third embodiment, unlike the first and second embodiments, the oil hole position adjusting portions 16B and 36B on the body 11 side and the plunger 12 side are not configured as slopes, and the plunger oil hole position adjustment is performed. The portion 36B is configured as the insertion portion 45, and the body oil hole position adjusting portion 16B is configured as the receiving portion 46. However, since structures other than the oil hole position adjusting portions 16B and 36B are the same as those in the first and second embodiments, in the third embodiment, the same or corresponding structures as those in the first and second embodiments are denoted by the same reference numerals. A duplicate description is omitted.

  As shown in FIG. 11, the insertion portion 45 has a protruding piece shape that integrally protrudes downward from the lower end of the protruding portion 22 of the plunger 12. And the insertion part 45 is arrange | positioned in the same position regarding the plunger oil hole 27 and the circumferential direction.

  As shown in FIG. 12, the receiving portion 46 has a groove-like shape that is recessed across the upper end surface and the inner peripheral surface of the step portion 15 of the body 11. And the receiving part 46 is arrange | positioned in the position on the opposite side with respect to the body oil hole 17 and the circumferential direction.

  Here, when the plunger 12 is inserted into the body 11, the insertion portion 45 is inserted into the receiving portion 46 in the axial direction. As shown in FIG. 10, when the plunger 12 is assembled to the body 11, the insertion portion 45 is always maintained in a state of being inserted into the receiving portion 46. Therefore, when the plunger 12 is raised during operation of the internal combustion engine, the insertion amount of the insertion portion 45 with respect to the receiving portion 46 becomes shallow, and when the plunger 12 is lowered, the insertion amount of the insertion portion 45 with respect to the receiving portion 46 becomes deep. Further, the receiving portion 46 is inserted with play in the circumferential direction with respect to the insertion portion 45, and relative rotation of the plunger 12 with respect to the body 11 is allowed within the range of play.

  When the insertion portion 45 is inserted into the receiving portion 46, the body oil hole 17 and the plunger oil hole 27 open to the opposite sides with respect to the circumferential direction regardless of whether the internal combustion engine is operating or stopped. ing. For this reason, as in the first and second embodiments, sufficient oil can be secured in the low pressure chamber 23, and when the oil flows from the low pressure chamber 23 to the high pressure chamber 31, air is caught in the high pressure chamber 31. Can be prevented. In particular, according to the third embodiment, it is only necessary to set the body oil hole 17 and the plunger oil hole 27 so as to open in different directions with the insertion portion 45 inserted in the receiving portion 46 in the axial direction. Therefore, it is possible to manage the dimensions of the insertion portion 45 and the receiving portion 46 relatively roughly, and the productivity is excellent.

<Other embodiments>
Other embodiments will be briefly described below.
(1) In the first to third embodiments, it is only necessary that the body oil hole and the plunger oil hole are opened in different directions, and the body oil hole and the plunger oil hole are necessarily opened on the opposite sides. There is no.
(2) Contrary to Example 1, a plunger oil hole is provided at the same position in the circumferential direction as one end in the radial direction of the plunger oil hole position adjusting section, and the other end in the radial direction of the body oil hole position adjusting section A configuration in which body oil holes are provided at the same position in the direction may be employed.
(3) Contrary to Example 2, the body oil hole position adjusting unit may be configured as an inclined surface, and the plunger oil hole position adjusting unit may be configured as a raised member.
(4) The shape and material of the body oil hole position adjusting unit of the second embodiment are not limited. For example, the body oil hole position adjusting unit may be a square block-shaped raising member, or may be made of metal or resin. .
(5) Contrary to the third embodiment, the insertion portion is arranged at a position (different position) opposite to the plunger oil hole in the circumferential direction, and the receiving portion is the same position (substantially the same position) in the circumferential direction of the body oil hole. The structure arrange | positioned may be sufficient.
(6) Contrary to the third embodiment, the insertion portion may be provided on the body side and the receiving portion may be provided on the plunger side.
(7) The present invention can also be applied to a case where the lash adjuster is arranged vertically when in use.

DESCRIPTION OF SYMBOLS 10, 10A, 10B ... Rush adjuster 11 ... Body 12 ... Plunger 13 ... Body bottom wall 14 ... Body peripheral wall 16, 16A, 16B ... Body oil hole position adjustment part (oil hole position adjustment part)
17 ... Body oil hole 19 ... Bottom wall of plunger 21 ... Peripheral wall of plunger 23 ... Low pressure chamber 24 ... Valve port (check valve part)
27 ... Plunger oil hole 31 ... High pressure chamber 32 ... Valve body (check valve part)
36, 36B ... Plunger oil hole position adjustment section (oil hole position adjustment section)
45 ... Insertion part 46 ... Receiving part 60 ... Cylinder head 61 ... Mounting hole 62 ... Oil supply hole

Claims (5)

A cylindrical body that is inserted into the mounting hole of the cylinder head, and a cylindrical plunger that is inserted into the body and is capable of reciprocating in the axial direction. A low pressure chamber is provided in the plunger, and the body A high pressure chamber defined by a bottom wall of the plunger is provided therein, and a check valve portion that allows oil to flow from the low pressure chamber to the high pressure chamber is provided on the bottom wall of the plunger, A body oil hole is provided in the peripheral wall of the body, a plunger oil hole is provided in the peripheral wall of the plunger, and the body oil hole and the plunger oil hole extend from an oil supply hole that opens to an inner surface of the mounting hole of the cylinder head. A lash adjuster in which oil is supplied to the low-pressure chamber sequentially, and further oil is supplied from the low-pressure chamber to the high-pressure chamber through the check valve portion,
Each of the body side and the plunger side is provided with an oil hole position adjusting portion capable of opening the body oil hole and the plunger oil hole in different directions ,
The oil hole position adjusting portion causes the body and the plunger to rotate relative to each other by abutting each other when the plunger is pushed toward the bottom wall side of the body due to the stop of the internal combustion engine. And the plunger oil hole are set to open in different directions . Of the oil hole position adjusting portions on the body side and the plunger side, at least one of the oil hole position adjusting portions is configured as a slope inclined in a direction intersecting the axial direction. The lash adjuster according to claim 1. A cylindrical body that is inserted into the mounting hole of the cylinder head, and a cylindrical plunger that is inserted into the body and is capable of reciprocating in the axial direction. A low pressure chamber is provided in the plunger, and the body A high pressure chamber defined by a bottom wall of the plunger is provided therein, and a check valve portion that allows oil to flow from the low pressure chamber to the high pressure chamber is provided on the bottom wall of the plunger, A body oil hole is provided in the peripheral wall of the body, a plunger oil hole is provided in the peripheral wall of the plunger, and the body oil hole and the plunger oil hole extend from an oil supply hole that opens to an inner surface of the mounting hole of the cylinder head. A lash adjuster in which oil is supplied to the low-pressure chamber sequentially, and further oil is supplied from the low-pressure chamber to the high-pressure chamber through the check valve portion,
Each of the body side and the plunger side is provided with an oil hole position adjusting portion capable of opening the body oil hole and the plunger oil hole in different directions,
The lash adjuster is characterized in that the oil hole position adjusting portion is provided so as to face the high pressure chamber at a bottom surface portion where the plunger and the body face each other in the axial direction . The oil hole position adjusting portion includes an insertion portion provided on one of the plunger side and the body side, and a receiving portion provided on the other side, and the insertion portion is in the axial direction to the receiving portion. The lash adjuster according to claim 3 , wherein the body oil hole and the plunger oil hole are set to open in different directions in the inserted state.   The lash adjuster according to any one of claims 1 to 4, wherein the oil hole position adjusting portion is provided so that the body oil hole and the plunger oil hole are opened on opposite sides. .

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