JP2021173233A - Roller lifter - Google Patents

Abstract

To provide a roller lifter capable of suitably regulating a position in a thrust direction of a roller with a simple configuration.SOLUTION: A roller lifter 10 includes a lifter body 20, a slide surface 22A, and a roller 50. The lifter body 20 is formed in a bottomed cylindrical shape so as to slidably reciprocate in a slide hole 12 of a lifter guide 11. The slide surface 22A is provided on a lower surface of the lifter body 20. The roller 50 is rotatably held between the lifter body 20 and a cam 100. An outer peripheral surface of the roller 50 slides on the slide surface 22A. A clip 70 is attached to the lower surface of the lifter body 20. The clip 70 is disposed within the lower surface of the lifter body 20 in a bottom surface view. The clip 70 includes a position regulating portion 71A which faces an end surface of the roller 50 in a manner contactable therewith.SELECTED DRAWING: Figure 1

Description

The present invention relates to a roller lifter.

Patent Document 1 discloses a conventional roller lifter. This roller lifter includes a support member and a roller. The rollers are rotatably held between the support member and the cam. The support member has a support wall portion and a support main body portion. The support wall portion has a cylindrical shape and is slidable in the support hole of the pump housing. The support main body is provided in a partition shape inside the support wall. A sliding contact surface is provided on the lower surface of the support main body. The outer peripheral surface of the roller can be slidably contacted with this sliding contact surface.

Japanese Unexamined Patent Publication No. 2010-37997

In Patent Document 1, the rollers are arranged in the support wall portion so that both ends in the axial direction face the inner surface of the support wall portion, whereby the end faces in the thrust direction are supported by the support member. However, the support main body portion that receives the outer peripheral surface of the roller is locked to the support wall portion by using a snap ring such as a C ring. Therefore, there is a concern that the configuration becomes complicated.

The present invention has been completed based on the above circumstances, and an object of the present invention is to provide a roller lifter capable of satisfactorily regulating the position of a roller in the thrust direction by a simple configuration.

The roller lifter of the present invention can rotate between a bottomed cylindrical lifter body that can slide back and forth in the hole of the housing, a sliding surface provided on the lower surface of the lifter body, and the lifter body and the cam. A roller that is held and whose outer peripheral surface slides on the sliding surface is provided, and a clip is attached to the lower surface of the lifter body, and the clip is arranged in the lower surface of the lifter body in a bottom view. It has a position regulating portion that faces the end face of the roller so as to be in contact with it.

According to the above configuration, the position of the roller in the thrust direction can be regulated by the position regulating portion of the clip without arranging the roller in the lifter body. Therefore, it is not necessary to perform complicated work such as fitting the sliding portion of the roller into the lifter body. Further, the clip is arranged in the lower surface of the lifter body when viewed from the bottom. Therefore, the clip does not interfere with the housing when the lifter body slides back and forth on the housing. Therefore, the roller lifter of the present invention can regulate the position of the roller in the axial direction by a simple structure.

It is sectional drawing which shows a part of the fuel supply apparatus including the roller lifter which concerns on Example 1 of this invention. It is a side view which shows the roller lifter which concerns on Example 1. FIG. It is a bottom view which shows the roller lifter which concerns on Example 1. FIG. It is a perspective view which shows the clip of the roller lifter which concerns on Example 1. FIG. It is a top view which shows the state before bending molding in the clip of the roller lifter which concerns on Example 1. FIG.

Preferred embodiments of the present invention are shown below.
The lifter body has a cylindrical portion and an attachment portion integrally projecting from the lower surface of the tubular portion, and the tubular portion is slidable on a hole surface of the housing. It is preferable that the sliding surface is provided on the lower surface of the attached portion, and the clip is attached to the attached portion and has a locking portion that locks with the locked portion of the attached portion. In this case, the clip can be easily attached to the lifter body.

The lifter body has an oil supply path for supplying oil between the lifter body and the roller, and the oil supply path penetrates from the inner bottom surface of the cylinder of the lifter body to the lower surface, and the sliding surface. It is preferable that the clip has a lower surface opening at a position adjacent to the lower surface opening, and has a deflector whose tip is projected toward the roller so as to face the lower surface opening. In this case, the space between the roller and the lifter body can be reliably lubricated with less waste of oil. That is, the oil that has entered the cylinder of the lifter body can reach the deflector from the opening on the lower surface of the oil supply path due to the inertial force acting when the lifter body rises, and can be further scattered from the deflector toward the roller. The structure can be configured to reliably supply oil to the surface, and reliable lubrication can be realized. In particular, there is a great merit that oil can be supplied to a sliding surface where seizure is likely to occur.

The clip can consist of a bent metal plate. In this case, it is not necessary to prepare a special mold or the like for molding the clip, and the manufacturing cost can be reduced. Further, since the weight of the clip can be reduced, an increase in inertial mass during reciprocating sliding of the lifter body can be suppressed.

The position restricting portion may have a higher hardness than other portions of the clip. In this case, when the position-regulating portion receives a thrust load from the roller, wear of the position-regulating portion can be suppressed.

<Example 1>
The roller lifter 10 of the first embodiment will be described with reference to FIGS. 1 to 5. In the following description, for convenience, the direction of reciprocating motion of the roller lifter 10 described later is defined as the vertical direction. That is, with respect to the vertical direction, the directions appearing in FIGS. 1 and 2 are defined as upward and downward as they are. However, the direction defined here does not limit the installation direction of the roller lifter according to the present invention.

The roller lifter 10 is configured as, for example, a pump lifter used in a fuel supply device of an internal combustion engine. Although not shown in detail, the fuel supply device supplies fuel adjusted to a high pressure by the roller lifter 10 to the combustion chamber of an engine (not shown). As shown in FIG. 1, the roller lifter 10 is incorporated in the lifter guide 11 of the cylinder head. The lifter guide 11 is an example of a housing.

As shown in FIG. 1, a sliding hole 12 is formed in the lifter guide 11. The sliding hole 12 has a substantially circular cross section extending in the vertical direction. The roller lifter 10 is inserted into the sliding hole 12 so as to be reciprocally slidable in the vertical direction by driving the cam 100. The cam 100 has a substantially triangular shape and is provided on the cam shaft 110. The camshaft 110 is arranged with its axis oriented in a predetermined direction.

A through hole 14 having a circular cross section having a diameter smaller than that of the sliding hole 12 is provided at the upper end of the sliding hole 12 so as to penetrate in the vertical direction. A plunger 15 is inserted into the through hole 14 so as to be slidable in the vertical direction. The upper end portion of the plunger 15 is arranged so as to be able to advance and retreat in a pressure chamber (not shown) communicating with the upper end of the through hole 14. When the upper end of the plunger 15 enters the pressure chamber, the fuel in the pressure chamber is pressurized.

As shown in FIGS. 1 to 3, the roller lifter 10 includes a lifter main body 20 including a cylindrical portion 21 and an attachment portion 22 integrated with the tubular portion 21, a roller 50 separate from the lifter main body 20, and a clip 70. And have.

The tubular portion 21 has a bottomed cylindrical shape with an open upper end and a bottom wall 24 at the lower end. The outer circumference of the tubular portion 21 is a sliding surface 23 that can slide on the inner circumference of the sliding hole 12. The lower end of the plunger 15, the retainer 16, and the urging member 17 are housed above the bottom wall 24 in the tubular portion 21. The retainer 16 has a disk shape along the radial direction, and the lower end portion of the plunger 15 is locked and fixed to the central portion thereof. The urging member 17 is a spring material made of a compression coil spring, the lower end of which abuts and supports the upper surface of the retainer 16, and the upper end of the urging member 17 abuts and supports the lifter guide 11, and elastically in the vertical direction. It is said to be stretchable. The urging member 17 has an urging force that urges the lifter body 20 toward the cam 100 and presses the roller 50 against the cam 100.

As shown in FIGS. 1 and 2, the attachment portion 22 is provided so as to project downward from the lower surface of the tubular portion 21. As shown in FIG. 3, the attachment portion 22 has a rectangular block shape when viewed from the bottom. The attachment portion 22 is arranged in the lower surface of the tubular portion 21 when viewed from the bottom. Specifically, the attachment portion 22 has a form in which the diagonal center in the bottom view is arranged at the center of the tubular portion 21, and the diagonal length is shorter than the diameter of the tubular portion 21. A clip 70, which will be described later, is attached to the attachment portion 22. The clip 70 fits within the lower surface of the tubular portion 21.

The attachment portion 22 has a sliding surface 22A and a locked portion 22B. The sliding surface 22A is provided on the lower surface of the attachment portion 22. The sliding surface 22A is formed on the lower surface of the attachment portion 22 in a groove shape that is recessed in a substantially semicircular arc shape in a side view. The sliding surface 22A extends parallel to the opposite side of one of the two pairs of opposite sides on the lower surface of the attachment portion 22, and extends over the entire length of the interval between the other opposite sides. The outer peripheral surface of the roller 50, which will be described later, is slidably fitted into the sliding surface 22A.

The locked portion 22B is configured as a concave groove having a square cross section that opens on the side surface of the attached portion 22. One locked portion 22B is provided on each of the four side surfaces of the attached portion 22 so as to be paired with each other. The locked portion 22B extends over the entire length of the side surface of the attachment portion 22 in parallel with the extending direction of the sliding surface 22A. The locking portion 72 of the clip 70, which will be described later, is locked to the locked portion 22B.

As shown in FIG. 1, the roller 50 is rotatably held between the lifter body 20 and the cam 100. The roller 50 has an axis extending in the vertical direction (hereinafter referred to as the axial direction) in FIG. The roller 50 is arranged with its axis oriented in a direction parallel to the axis of the camshaft 110. In this state, the roller 50 is slidably housed in the sliding surface 22A of the attachment portion 22 of the lifter body 20. The roller 50 is simply housed in the sliding hole 12 and sandwiched between the roller 50 and the cam 100, and no other holding means is particularly provided. The roller 50 is allowed to move in the axial direction.

The roller 50 has a columnar sliding portion 51 and small diameter portions 52 provided at both ends of the sliding portion 51 in the axial direction coaxially with the axis of the sliding portion 51. The outer peripheral surface of the sliding portion 51 slides on the sliding surface 22A of the attached portion 22. The radius of the sliding portion 51 of the roller 50 is smaller than the radius of the arc formed by the sliding surface 22A. The small diameter portion 52 has a columnar shape having a diameter smaller than the diameter of the sliding portion 51, and is formed so as to project outward in the axial direction from both end faces of the sliding portion 51. In the roller 50, the distance between the end faces of the small diameter portion 52 (the axial length of the roller 50) is slightly shorter than the length of the sliding surface 22A in the extending direction.

As shown in FIGS. 1 to 3, the lifter main body 20 has an oil supply path 25. The oil supply path 25 supplies oil between the lifter body 20 and the roller 50. The oil supply path 25 penetrates vertically from the upper surface (bottom surface of the inner cylinder) of the bottom wall 24 of the lifter body 20 to the lower surface of the attachment portion 22. The lower surface opening 25A of the oil supply path 25 is formed at a position adjacent to the sliding surface 22A of the attachment portion 22. In this embodiment, the oil supply passages 25 are formed at two locations. Specifically, as shown in FIG. 3, the two oil supply passages 25 are located on both sides of the lower surface of the attachment portion 22 with the sliding surface 22A interposed therebetween, and the respective lower surface openings 25A are located on the sliding surface 22A. It is a form in which the oil is arranged diagonally with respect to the stretching direction.

The clip 70 is attached to the lower surface of the lifter body 20. Specifically, as shown in FIGS. 1 to 3, the clip 70 is attached to the lifter main body 20 so as to cover the four side surfaces of the attachment portion 22. The clip 70 is arranged in the lower surface of the lifter body 20 when viewed from the bottom. In the case of this embodiment, the clip 70 is an integral plate-shaped molded body formed by bending an elastically deformable thin metal plate into a predetermined shape. As shown in FIG. 4, the clip 70 has a square cylinder shape (square box shape) that opens vertically. The clip 70 has a peripheral wall 71, a locking portion 72, a deflector 73, and a connecting piece 74.

Further, FIG. 5 shows a state of the clip 70 before bending. In FIG. 5, each reference numeral corresponds to each portion of the clip 70 after bending and molding. Further, in FIG. 5, the alternate long and short dash line is a boundary of each part and indicates a bent line.

As shown in FIG. 4, the peripheral wall 71 is configured to have a pair of position regulating portions 71A and a pair of inter-wall portions 71B. The wall surfaces of the pair of position limiting portions 71A each have a rectangular shape and extend in parallel with each other and face each other. The pair of position restricting portions 71A are arranged so as to cover the pair of side surfaces of the attachment portions 22 corresponding to both ends of the sliding surface 22A in the extending direction in a state where the clip 70 is attached to the lifter main body 20. In this state, the pair of position limiting portions 71A face each other on both end surfaces of the roller 50 so as to be in contact with each other. The distance between the wall surfaces of the pair of position regulating portions 71A is slightly larger than the axial length of the roller 50. Each position regulating portion 71A is subjected to induction hardening treatment for the purpose of improving wear resistance. In the clip 70, only the position regulating portion 71A is subjected to the quenching treatment. The position regulating portion 71A is provided with a hardness higher than that of other parts (for example, HV650 to HV850, the other part is about HV400) by quenching treatment. Therefore, the position regulating portion 71A is excellent in wear resistance, but its elastic force is smaller than that of other portions.

The pair of inter-wall portions 71B are arranged adjacent to both ends of the pair of position-regulating portions 71A in the width direction, and extend in a direction orthogonal to the extending direction of the pair of position-regulating portions 71A. As shown in FIG. 4, each interwall portion 71B has a convex plate shape that is convex downward, in other words, has a shape in which both ends in the width direction of the lower end portion of the rectangular plate are cut out in a rectangular shape. ..

As shown in FIGS. 4 and 5, the position regulating portion 71A and the interwall portion 71B are connected via the connecting piece 74. In other words, the position regulating portion 71A and the interwall portion 71B are not directly connected. As shown in FIG. 4, the connecting pieces 74 are provided at the four corners of the lower end of the peripheral wall 71. The connecting piece 74 is a plate piece whose plate surface is directed in the vertical direction, and extends in a direction orthogonal to each of the position regulating portion 71A and the interwall portion 71B. The connecting piece 74 connects the position regulating portion 71A and the interwall portion 71B adjacent to each other.

As shown in FIG. 4, the pair of locking portions 72 are bent inward from the upper end edges of the pair of inter-wall portions 71B and extend. Each locking portion 72 is formed over the entire length of the interwall portion 71B in the width direction. As shown in FIGS. 1 and 2, when the clip 70 is attached to the attachment portion 22, the pair of locking portions 72 are locked to the pair of locked portions 22B provided on the attachment portion 22. As a result, the clip 70 is fixed to the attachment portion 22. Specifically, the clip 70 is fixed to the attachment portion 22 so as to sandwich the attachment portion 22 between the locking portion 72 and the connecting piece 74. The locking portion 72 is bent when the clip 70 is attached to the attachment portion 22.

As shown in FIGS. 4 and 5, the pair of deflectors 73 have a form of being bent inward from each lower end edge of the pair of inter-wall portions 71B and extending inward. As shown in FIGS. 1 and 2, the pair of deflectors 73 extend inward at a position one step lower than the connecting piece 74. As a result, when the clip 70 is attached to the attachment portion 22, the pair of deflectors 73 are arranged at a predetermined distance from the lower surface of the attachment portion 22. The deflector 73 extends so as to cover the lower surface opening 25A of the oil supply path 25 when viewed from the bottom. The pair of deflectors 73 face the lower surface opening 25A of the oil supply path 25, and the tip thereof is projected toward the roller 50. As shown in FIG. 3, the distance between the tips of the pair of deflectors 73 is larger than the outer diameter of the roller 50.

Next, a method of assembling the roller lifter 10 of the first embodiment will be described.
At the time of assembly, first, the clip 70 is formed by bending. That is, the metal plate material punched into a predetermined shape is bent between the deflector 73 and the inter-wall portion 71B, bent between the connecting piece 74 and the inter-wall portion 71B, and between the connecting piece 74 and the position regulating portion 71A. Bend in the order of. As a result, an intermediate molded body of the clip 70 is formed. The intermediate molded body of the clip 70 is different from the shape of the clip 70 shown in FIG. 4 in that the intermediate wall portion 71B and the locking portion 72 have not yet been bent.

Subsequently, the intermediate molded body of the clip 70 is attached to the attachment portion 22 of the lifter body 20. At this time, the peripheral wall 71 is attached so that the position regulating portion 71A is located at both ends of the sliding surface 22A in the extending direction. Further, at this time, the upper surface of the connecting piece 74 is brought into contact with the lower surface of the attachment portion 22. Then, in this state, the upper end of the portion corresponding to the interwall portion 71B is crimped and bent to form the locking portion 72. As a result, the locking portion 72 is locked to the locked portion 22B of the attachment portion 22, and the clip 70 is fixed to the lifter main body 20. Finally, the roller 50 is fitted into the sliding surface 22A. In this state, the roller 50 is not fixed to the lifter body 20. When the lifter body 20 is assembled to the sliding hole 12 of the lifter guide 11, the roller 50 is sandwiched between the cam 100 and the lifter body 20 so that the roller 50 can rotate between the lifter body 20 and the cam 100. Be retained.

Next, the operation of the roller lifter 10 of the first embodiment will be described.
When the cam 100 rotates around the camshaft 110, the roller lifter 10 reciprocates up and down in the sliding hole 12 while the roller 50 is driven to rotate. The plunger 15 moves up and down with the vertical movement of the roller lifter 10 to generate a pumping action. As a result, the fuel adjusted to high pressure is supplied to the combustion chamber. Since the clip 70 is arranged in the lower surface of the lifter main body 20 when viewed from the bottom surface, it does not interfere with the inner peripheral surface of the sliding hole 12.

The sliding hole 12 communicates with an oil supply passage (not shown), and oil is supplied to the roller lifter 10 that slides in the sliding hole 12. When the oil enters the tubular portion 21 of the lifter main body 20, it enters the oil supply path 25 due to the inertial force acting when the roller lifter 10 rises. The oil in the oil supply path 25 reaches the lower surface opening 25A and falls on the upper surface of the deflector 73. The deflector 73 scatters the dropped oil as it moves up and down, and supplies a part of the oil to the outer peripheral surface of the roller 50. As described above, since the oil is surely supplied to the outer peripheral surface of the roller 50 in the roller lifter 10, an oil film between the roller lifter 10 and the sliding surface 22A can be easily formed.

The roller 50 normally rotates with a gap formed between the end surface of the small diameter portion 52 and the position restricting portion 71A. When the roller 50 is affected by vibration, tilt, or the like, it moves in the thrust direction and comes into contact with the position regulating portion 71A, and further movement is restricted. In this state, when a force in the ascending direction is received from the cam 100, the end surface of the small diameter portion 52 of the roller 50 is pressed against the position regulating portion 71A. However, since the position regulating portion 71A is subjected to induction hardening treatment, it is possible to reduce the wear of the small diameter portion 52 with the end surface.

When the ascending force from the cam 100 decreases, the roller 50 is pushed back in the axial direction by the position regulating unit 71A. Specifically, the position regulating portion 71A is connected to the connecting piece 74 at the lower end portion. Since the connecting piece 74 has not been subjected to a process such as quenching, elastic deformation is more likely to occur than the position regulating portion 71A. Therefore, when the position restricting portion 71A is pressed against the end face of the roller 50, the connecting piece 74 functions like a leaf spring and elastically deforms. As a result, when the force of the roller 50 in the ascending direction decreases, the connecting piece 74 elastically returns, and the position regulating portion 71A applies an axial pressing force to the end face of the roller 50. The roller 50, which receives the pressing force from the position regulating unit 71A, is pushed back toward the center in the axial direction and can return to the normal position. In this way, the end face of the roller 50 comes into contact with the position regulating portion 71A only when an axial displacement occurs. Even when the roller 50 comes into contact with the position regulating portion 71A, it is pushed back to the normal position by the action of the spring force of the connecting piece 74, and the state of contact with the position regulating portion 71A does not continue. Wear is further reduced.

As described above, according to the roller lifter 10 according to the first embodiment, the position of the roller 50 in the thrust direction can be regulated by the position regulating portion 71A of the clip 70 without arranging the roller in the lifter main body. .. Therefore, it is not necessary to perform complicated work such as fitting the sliding portion of the roller into the lifter body. Further, the clip 70 is arranged and attached to the lower surface of the lifter main body 20 when viewed from the bottom surface. Therefore, the clip 70 does not interfere with the inner wall of the sliding hole 12 when the lifter main body 20 slides back and forth in the sliding hole 12. Therefore, the roller lifter 10 can regulate the position of the roller 50 in the axial direction by a simple configuration.

Further, since the position regulating unit 71A is provided on the clip 70, it is not necessary to provide a function like the position regulating unit 71A on the lifter body 20 side, and the configuration of the lifter body 20 can be simplified.

The lifter main body 20 has a tubular portion 21 and an attachment portion 22 that is integrally projected on the lower surface of the tubular portion 21. The tubular portion 21 is slidable in the sliding hole 12 of the lifter guide 11. The sliding surface 22A on which the roller 50 slides is provided on the lower surface of the attachment portion 22. The clip 70 is attached to the attachment portion 22 and has a locking portion 72 that locks with the locked portion 22B of the attachment portion 22. Therefore, the clip 70 can be easily attached to the lifter body 20.

The lifter body 20 has an oil supply path 25 for supplying oil between the lifter body 20 and the roller 50. The oil supply path 25 has a lower surface opening 25A. The lower surface opening 25A penetrates from the inner bottom surface of the lifter body 20 to the lower surface and opens at a position adjacent to the sliding surface 22A. The clip 70 has a deflector 73 that faces the lower surface opening 25A and whose tip is projected toward the roller 50. Therefore, the roller lifter 10 can reliably lubricate between the roller 50 and the lifter main body 20 with less waste of oil. That is, in the roller lifter 10, the oil that has entered the cylinder of the lifter body 20 reaches the deflector 73 from the lower surface opening 25A of the oil supply path 25 due to the inertial force acting when the lifter body 20 rises, and further from the deflector 73 to the roller. Since the oil is scattered toward the 50, the oil can be reliably supplied to the outer peripheral surface of the roller 50, and reliable lubrication can be realized. In particular, there is a great merit that oil can be supplied to a sliding surface where seizure is likely to occur.

The clip 70 is made of a bent metal plate. Therefore, it is not necessary to prepare a special mold or the like for molding the clip 70, the manufacturing cost can be reduced, the manufacturing is easy, and the attachment to the lifter main body 20 is excellent. Further, since the weight of the clip 70 can be reduced, it is possible to suppress an increase in the inertial mass when the lifter body 20 slides back and forth.

The position regulating portion 71A has a higher hardness than other portions of the clip 70. Therefore, when the position regulating unit 71A receives a thrust load from the roller 50, it is possible to suppress the wear of the position regulating unit 71A.

The position regulating unit 71A is connected to the connecting piece 74. Specifically, the position regulating portion 71A is connected to the connecting piece 74 at the lower end portion. Unlike the position regulating section 71A, the connecting piece 74 is not subjected to induction hardening treatment and is softer than the position regulating section 71A. Therefore, when the roller 50 comes into contact with the position regulating portion 71A, the roller 50 can be pushed back to the normal position by applying a spring force by elastically deforming instead of the position regulating portion 71A.

<Other Examples>
Hereinafter, other embodiments will be briefly described.
(1) In the above embodiment, a form in which the clip has an interwall portion, a locking portion, a deflector, a connecting piece, and the like in addition to the position regulating portion is illustrated, but these are not essential configurations. The configuration of the clip is not particularly limited as long as it has a position regulating portion. Further, the material of the clip is not limited to metal, and may be another material such as resin.
(2) In the above embodiment, the form in which the clip is attached to the lifter body by the locking portion is illustrated, but the clip can be attached to the lifter by other methods such as screwing and welding. good.
(3) In the above embodiment, as the oil supply path, two oil supply paths having a lower surface opening adjacent to the sliding surface with the roller and arranged diagonally with respect to the sliding surface are provided. Illustrated, but this is not required. When the lifter body has an oil supply path, the number, position, opening shape, etc. of the lifter body are not particularly limited.
(4) When the clip has a deflector, the number, shape, and the like thereof are not limited to the above embodiment. The deflector may be, for example, closer to or closer to the lower surface of the lifter body than in the above embodiment. Further, the deflector may be provided, for example, with a distance between the protruding ends being narrower than the outer diameter of the roller. In this case, it is possible to easily prevent the roller from falling off from the sliding surface.
(5) In the above embodiment, the position-regulated portion is induction-hardened to have a hardness higher than that of other portions, but this is not essential. When the position-regulating portion is provided with a hardness higher than that of other portions, the treatment method is not limited to induction hardening treatment, and other heat treatment may be adopted. Further, for the purpose of improving wear resistance, a high-hardness metal film may be formed on the position-regulating portion instead of or in combination with heat treatment such as induction hardening treatment. Further, the present invention is not limited to metal plating, and other surface treatments such as DLC and resin coating may be applied.
(6) In the above embodiment, an example in which an oil supply path is formed in the lifter body for lubrication is illustrated, but this is not essential. The roller lifter according to the present invention may have a form in which oil is directly injected by an oil jet instead of or in combination with a form in which an oil supply path is formed.

10 ... Roller lifter 20 ... Lifter body 21 ... Cylindrical part 22 ... Attached part 22A ... Sliding surface 22B ... Locked part 25 ... Oil supply path 25A ... Bottom opening 50 ... Roller 70 ... Clip 71A ... Position regulation part 72 ... Stop 73 ... Deflector 100 ... Cam

Claims (5)

A bottomed cylindrical lifter body that can slide back and forth in the hole of the housing,
A sliding surface provided on the lower surface of the lifter body and
A roller that is rotatably held between the lifter body and the cam and whose outer peripheral surface slides on the sliding surface.
With
A clip is attached to the lower surface of the lifter body,
The clip is a roller lifter that is arranged in the lower surface of the lifter body in a bottom view and has a position restricting portion that faces the end face of the roller so as to be in contact with the end face of the roller. The lifter main body has a cylindrical portion and an attachment portion integrally projecting from the lower surface of the tubular portion, and the tubular portion is slidable on a hole surface of the housing. The sliding surface is provided on the lower surface of the attachment portion, and is provided on the lower surface of the attachment portion.
The roller lifter according to claim 1, wherein the clip is attached to the attachment portion and has a locking portion that locks with the locked portion of the attachment portion. The lifter body has an oil supply path for supplying oil between the lifter body and the roller.
The oil supply path penetrates from the inner bottom surface of the cylinder of the lifter body to the lower surface, and has a lower surface opening at a position adjacent to the sliding surface.
The roller lifter according to claim 1 or 2, wherein the clip has a deflector that faces the lower surface opening and has a tip protruding toward the roller. The roller lifter according to any one of claims 1 to 3, wherein the clip is made of a bent metal plate. The roller lifter according to any one of claims 1 to 4, wherein the position regulating portion has a hardness higher than that of other parts of the clip.

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