CN107345491B - Cam follower roller apparatus - Google Patents
Cam follower roller apparatus Download PDFInfo
- Publication number
- CN107345491B CN107345491B CN201710273408.XA CN201710273408A CN107345491B CN 107345491 B CN107345491 B CN 107345491B CN 201710273408 A CN201710273408 A CN 201710273408A CN 107345491 B CN107345491 B CN 107345491B
- Authority
- CN
- China
- Prior art keywords
- tappet body
- tappet
- cam follower
- longitudinal
- follower roller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005096 rolling process Methods 0.000 claims abstract description 26
- 230000014759 maintenance of location Effects 0.000 claims description 17
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000004696 Poly ether ether ketone Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 6
- 229920002530 polyetherether ketone Polymers 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 229920002994 synthetic fiber Polymers 0.000 description 5
- 239000004952 Polyamide Substances 0.000 description 4
- 229920002647 polyamide Polymers 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
- F16H53/06—Cam-followers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2305/00—Valve arrangements comprising rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2307/00—Preventing the rotation of tappets
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Gears, Cams (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The present invention relates to a cam follower roller apparatus comprising: a tappet extending along a longitudinal axis and including a cylindrical tappet body defining a bore. The apparatus further includes a rolling assembly disposed within the bore and including a support body having a base and two longitudinal flanges extending longitudinally from the base within the bore of the tappet body, a pin centered on a transverse axis and including two opposing ends each adapted to be supported by the flanges of the support body, and a roller rotatably mounted on the pin about the transverse axis. According to the invention, the support body is provided with at least one elastically deformable projection extending longitudinally from the base of the support body in the bore of the tappet body and comprising first longitudinal retaining means, and the tappet body comprises means cooperating with said first longitudinal retaining means.
Description
Technical Field
The present invention relates to a cam follower roller device, in particular for a jet pump or valve actuator for a motor vehicle. The invention also relates to a method of assembling such a cam follower roller apparatus.
Background
Generally, a cam follower roller device belonging to an injection pump comprises at least a tappet, a roller and a pin, made of copper or steel. The roller is rotatably mounted on a pin, the rolling assembly is centered on the transverse axis, and the tappet extends along the longitudinal axis. The tappet is formed with a cylindrical body defining an internal volume in which the pin and the roller are disposed.
The roller extends axially from the tappet so as to cooperate with a cam synchronized with a camshaft of the internal combustion engine. Rotation of the camshaft causes the piston of the pump against the tappet to cyclically displace to allow fuel to be delivered. The tappet is movable back and forth along the longitudinal axis.
It is known from FR- A-2946406 to provide A support body within the tappet body to support the rolling assembly. The ends of the pin are fixed, for example by press fitting, within through holes formed in the peripheral wall of the support body and are arranged opposite to each other. However, vibrations or shocks may separate the support body from the tappet body.
FR- A-2998629 also proposes A support body seated on the base of the tappet body, said support body comprising two support portions having A semicircular shape and open to the upper side of the device to support the ends of the pins. However, such assemblies require complex tappet designs with internal seats for the support body.
Disclosure of Invention
It is an object of the present invention to propose an improved cam follower roller device comprising a support body with effective means of retaining the rolling assembly within the tappet body, which is low-cost, has a long service life and has an improved assembly process.
To this end, the invention relates to a cam follower roller apparatus comprising: a tappet extending along a longitudinal axis and including a cylindrical tappet body defining a bore. The cam follower roller apparatus further includes a rolling assembly disposed within the bore. The rolling assembly comprises a support body having a base and two longitudinal flanges extending longitudinally from the base within the bore of the tappet body, a pin centered on a transverse axis and comprising two opposite ends each adapted to be supported by the flanges of the support body, and a roller rotatably mounted on the pin about the transverse axis.
According to the invention, the support body is provided with at least one elastically deformable projection extending longitudinally from the base of the support body in the bore of the tappet body and comprising first longitudinal retaining means, and the tappet body comprises means cooperating with said first longitudinal retaining means.
Thanks to the invention, the support body of the rolling assembly is longitudinally retained within the tappet body. The device can be transported and installed without risk of losing components.
Such a cam follower roller apparatus does not require any additional elements to be manufactured, installed and fixed for ensuring the longitudinal retention of the rolling assembly within the tappet body. The proposed invention is thus cost-effective and material-saving.
Furthermore, the projection provided with the longitudinal retaining means extends longitudinally within the cavity defined by the tappet body. The design is compact in the longitudinal and transverse directions and is suitable for use in jet pumps or valve actuators for motor vehicles.
According to advantageous but not compulsory further aspects of the invention, such a cam follower roller device may comprise one or more of the following features:
the support body is provided with two bosses opposite each other with respect to the longitudinal axis.
The first longitudinal retention means provided on the boss comprise at least one outwardly projecting portion extending transversely from the boss towards the tappet body.
-said outwardly protruding portion of the boss comprises a lateral flange having a lateral lower surface.
-said outwardly protruding portion of the boss comprises a bulge, in particular a bulge having a hemispherical shape or a frustoconical shape.
The projection comprises a ramp portion on the longitudinally opposite side of the first longitudinal retention means to facilitate insertion of the projection into the bore of the tappet body.
The boss comprises a free end provided with a transverse flange having a transverse lower surface and a bulge protruding from said boss.
The bore of the tappet body comprises an inwardly projecting portion extending transversely from said bore towards the interior of the tappet body and comprising an upper transverse surface cooperating with said first longitudinal retention means of the boss.
-said upper transverse surface is formed as an edge of said inwardly projecting portion of the tappet body.
The bore of the tappet body comprises a recess comprising an upper transverse surface cooperating with said first longitudinal retention means of the projection.
-said recess is provided in said inwardly protruding part of the tappet body.
The bore of the tappet body comprises an internal ramp portion longitudinally opposite the means cooperating with the first longitudinal retention means of the projection to facilitate the insertion of the projection into the bore of the tappet body.
-the inwardly projecting portion of the tappet body comprises a frustoconical surface dedicated to cooperating with a correspondingly shaped surface of said outwardly transverse flange of the boss, said cooperating frustoconical surface being directed in a direction opposite to the displacement of the removal of said support body from the tappet body.
The tappet body comprises second longitudinal retaining means for the rolling assembly.
The pin is arranged longitudinally between a first longitudinal retaining means of the projection cooperating with the bore of the tappet body and a second longitudinal retaining means of the tappet body.
The second longitudinal retention means of the tappet body comprise at least one transverse portion extending from the cylindrical portion of the tappet body towards the inside of said tappet body.
The second longitudinal retaining means cooperate with the end of the pin or with a flange of said end of the support pin of the support body.
The cam follower roller device comprises a rolling bearing interposed between the pin and the roller.
The cam follower roller device comprises a sliding bushing interposed between the pin and the roller.
The cam follower comprises at least one anti-rotation device located on the outer periphery of the tappet body.
The tappet body is made of a synthetic material, for example polyamide or polyetheretherketone.
The tappet body is made of metal, for example steel.
The support body is made of metal, for example of steel.
The holding device is made of metal, for example of stamped sheet metal made of steel.
The support body is made of two different materials, the projection being of a more deformable material than the materials of the base and the flange.
The projection is made of a synthetic material, for example polyamide or polyetheretherketone.
The projection is made of a synthetic material and is overmoulded on the base made of metal.
The lateral flange comprises support means for the end of the pin, said support means of the lateral flange comprising a concave portion having a semicircular shape and opening to the upper side of the device.
The lateral flange comprises support means for the end of the pin, said support means of the lateral flange comprising a cylindrical hole in which the end of the pin is inserted.
The invention also relates to an injection pump for a motor vehicle, equipped with a cam follower roller device as described above.
The invention also relates to a valve actuator for a motor vehicle, which is equipped with a cam follower roller device as described above.
Drawings
The invention will now be explained in connection with the attached drawings, which are given as illustrative examples and not limiting for the purpose of the invention. In the drawings:
figure 1 is a top perspective view of a cam follower roller apparatus according to a first embodiment of the present invention;
figure 2 is a bottom perspective view of the cam follower roller apparatus;
figure 3 is a cross-sectional view along the line I-I of the cam follower roller device;
figure 4 is a sectional view along the line II-II of the cam follower roller apparatus;
figure 5 is a perspective view of a supporting body dedicated to be arranged inside the cam-follower device;
figure 6 is a cross-sectional view along the same line I-I of a cam follower roller apparatus according to a second embodiment of the present invention; and
figure 7 is a perspective view of a supporting body dedicated to be arranged inside the cam-follower device.
Detailed Description
The cam follower roller device 1 shown in fig. 1 to 4 is adapted to be equipped with an injection pump (injection pump) for a motor vehicle (not shown), preferably for a gasoline car.
The device 1 comprises a tappet 2 and a rolling assembly 3, the rolling assembly 3 comprising a support body 4, a pin 5 and a roller 6. Pin 5 and roller 6 are centered on transverse axis X5, while tappet 2 is centered along longitudinal axis X2. The axis X2 is perpendicular to X5.
In the following, for the sake of facilitating the specific identification (specific identification) of the apparatuses 1 of these figures and of the following figures, the adjectives "longitudinal" and "transverse" and the adverbs "longitudinal" and "transverse" are defined with respect to the axes X2 and X5, respectively. Thus, the longitudinal portions or sections are parallel to the axis X2, while the transverse portions or sections are perpendicular to said axis X2 and parallel to the axis X5.
The tappet 2 comprises a cylindrical tappet body 7, the cylindrical tappet body 7 being centered on the axis X2 and extending between an upper edge 8 and a lower edge 9. The tappet body 7 defines a cylindrical outer surface 10a and a cylindrical inner bore 10b, the cylindrical inner bore 10b defining a cavity 11 inside the tappet 2. The housing 11 is adapted to accommodate the rolling assembly 3. The tappet 2 is able to move back and forth along the axis X2 in a not shown hole belonging to an injection pump or motor by sliding the surface 10a in the hole. Said surface 10a comprises anti-rotation means 10c, here projections dedicated to slide in adapted grooves provided in the hole, to prevent any rotation of said tappet 2 in this hole. The tappet 2 can be made of a synthetic material, such as polyamide 6.6(PA) or Polyetheretherketone (PEEK), or of a metal, such as steel. The material of the tappet 2 is selected to withstand the oil and its additives and temperature variations.
The rolling assembly 3 is arranged in the receptacle 11 of the tappet body 7. The rolling assembly 3 comprises a supporting body 4, the supporting body 4 forming a supporting element for the pin 5 and the roller 6. The support body 4 comprises a base 13 centred on the transversal axis X5. Two lateral flanges 14, 15 are opposite each other with respect to said base 13 and extend longitudinally from said base 13 towards the upper side of the device 1.
The lateral flanges 14, 15 each comprise support means 16, 17 for the pin 5. The pin 5 is cylindrical and extends along a transverse axis X5. In the embodiment shown in fig. 4, the support means 16, 17 of the lateral flanges 14, 15 each comprise a concave portion having a semicircular shape (profile) and opening towards the upper side of the device 1. Said recessed portions 16, 17 are adapted to receive the ends 18, 19 of the pin 5. The shape of the recesses 16, 17 matches the cylindrical ends 18, 19 of the pin 5. As an alternative (not shown), the support means of the lateral flanges 14, 15 may each comprise a cylindrical hole into which the end of a pin is inserted. As an embodiment not shown, at least one end 18 or 19 may be fixed to the respective support device 16 or 17, respectively.
The rolling assembly 3 further comprises a roller 6, the roller 6 being rotatably mounted on the pin 5 by means of a sliding bushing 20 arranged between said pin 5 and the roller 6. Alternatively, the sliding bush may be replaced with a rolling bearing having rollers (rollers) or needles. The roller 6 extends longitudinally from the upper edge 8 of the tappet 2 so as to cooperate with a cam synchronized with the camshaft of an internal combustion engine, not shown.
According to the invention, the rolling assembly 3 is longitudinally retained within the tappet 2 by means of a projection (tab)21, 22.
The projections 21, 22 are arranged on the support body 4 and extend longitudinally within the receptacle 11 of the tappet body 7 from the base 13 towards the upper edge 8 of the tappet body 7. The lobes 21, 22 are opposite each other with respect to the longitudinal axis X2.
The base 13 and the flanges 14, 15 of the support body 4 are preferably made of metal, for example steel such as XC 75. The material is selected to withstand oil flow, temperature changes and mechanical stress. The base 13 and the flanges 14, 15 are preferably made of a single metal plate deformed by stamping, so that cost reduction and weight reduction are possible.
As shown in fig. 3 to 5, the bosses 21, 22 are made of a different material from the base 13 and the flanges 14, 15 of the support body 4. The material of the projections 21, 22 is more elastically deformable than the base 13 and the flanges 14, 15. Advantageously, the projections 21, 22 are made of a synthetic material, such as polyamide 6.6(PA) or Polyetheretherketone (PEEK).
As shown in fig. 4 and 5, the bosses 21, 22 are overmolded onto the metallic base 13 and flanges 14, 15. The flanges 14, 15 comprise through openings 14a, 15a in which the material of the bosses 21, 22 is moulded to ensure a strong fixing of the assembled support body 4. The projections 21, 22 are moulded from the same material during the same process step and are connected together by a connecting portion 23 moulded to the base 13. Alternatively, the bosses 21, 22 may be formed separately.
Alternatively (not shown), the bosses 21, 22 are made from a single metal sheet, deformed by stamping, that is the same piece as the base 13 and the flanges 14, 15.
The projections 21, 22 each comprise a first longitudinal retention means 24, 25 cooperating with the tappet body 7. Said retaining means 24, 25 each comprise an outward transverse flange 26, 27 extending transversely from said boss 21, 22 towards the tappet body 7, and said retaining means 24, 25 are provided with a lower support surface.
The bore 10b of the tappet body 7 comprises inwardly projecting portions 28, 29 extending laterally from said bore 10b towards the interior of the tappet body 7 and each having an upper edge 30, 31 with an upper support surface. The protruding portions 28, 29 of the hole 10b are opposite to each other with respect to the axis X2, and the position of the protruding portions 28, 29 corresponds to the position of the bosses 21, 22 of the support body 4. The upper support surfaces of the inwardly projecting portions 28, 29 support the lower support surfaces of the outwardly transverse flanges 26, 27 in the longitudinal direction.
Advantageously, an axial clearance is provided between the outward transverse flanges 26, 27 and the associated projections 28, 29.
Advantageously, said projecting portions 28, 29 each comprise a frustoconical surface dedicated to cooperating with a correspondingly shaped surface of the outward transverse flange 26, 27. More precisely, the cone vertex formed by the frustoconical surfaces of said projections 28, 29 is centred on the central axis X2 and directed towards the roller 6, i.e. said cone is directed in the same direction as the direction of insertion of the rolling assembly 3 in the tappet 2. The mating frustoconical surfaces of the portions 26, 27 and 28, 29 are respectively directed in a direction opposite to the phase shift of removal of said support body 4 from the tappet body 7. The axial retention of the support body 4 in the tappet body 7 is greatly improved.
The bosses 21, 22 also each include a ramp portion 32, 33 longitudinally opposite the lower surface of the outward transverse flanges 26, 27. The ramp portions 32, 33 of the bosses 21, 22 are dedicated to cooperate with the corresponding ramp portions 34, 35 of the inwardly projecting portions 28, 29 in order to facilitate the sliding insertion of the bosses 21, 22 into the tappet body 7, and more particularly into the tappet body 7 by means of the inwardly projecting portions 28, 29.
The rolling assembly 3 is inserted longitudinally into the housing 11 from the lower edge 9 towards the upper edge 8 of said tappet body 7. The protrusions 21, 22 are elastically deformed by the slope portions 34, 35 of the inward projecting portions 28, 29 provided in the hole 10b of the tappet body 7. The bosses 21, 22 slide against said inwardly projecting portions 28, 29 until the outwardly directed transverse flanges 26, 27 of the bosses 21, 22 pass the edges 30, 31 of said portions 28, 29. The transverse flanges 26, 27 are supported in the longitudinal direction by said edges 30, 31. The rolling assembly 3, comprising the support body 4 supporting the pin 5 and the roller 6 in the longitudinal direction, is then arranged in the housing 11 of the cylindrical tappet body 7 and is held in the tappet body by means of the projections 21, 22.
The tappet body 7 further comprises second longitudinal retaining means 36, 37 for retaining the rolling assembly 3 within the tappet 2. The second longitudinal retention means each comprise a transverse portion 36, 37 extending from the upper edge 8 of the tappet body 7 towards the inside of the tappet body 7. The transverse portions 36, 37 are opposite each other towards the axis X2.
Said transverse portions 36, 37 longitudinally cover the ends 18, 19 of the pin 5 so as to prevent any disassembly (dislodging) of said pin 5 from the upper side of the tappet body 7 and therefore of the rolling assembly 3 from the upper side of the tappet body 7.
The rolling assembly 3 is then longitudinally retained on one side by the cooperation between the first fixing means 24, 25 of the bosses 21, 22 of the support body 4 and the inwardly projecting portions 28, 29 of the tappet body 7, and on the other side by the second fixing means 36, 37 of the tappet body 7.
The second embodiment shown in fig. 5 to 7 differs from the embodiment of fig. 1 to 4 in that the first longitudinal retention means 24, 25 further comprise bulges (bulks) 38, 39 cooperating with the inwardly projecting portions 28, 29 of the tappet body 7.
The bulging portions 38, 39 project laterally from the protrusions 21, 22, respectively, toward the tappet body 7. Advantageously, the bulges 38, 39 can have a hemispherical shape, as shown in fig. 6, or a frustoconical shape, as shown in fig. 7, to allow easy insertion into the inwardly projecting portions 28, 29 of the hole 10b of the tappet body 7. When the support body 4 is inserted into the receptacle 11 of the tappet body 7, the bulges 38, 39 slide against the ramp portions 34, 35 of the inward projections 28, 29.
The inwardly projecting portions 28, 29 are each provided with a recess 40, 41 respectively. The bulges 38, 39 engage in the recesses 40, 41 and ensure improved longitudinal retention of the support body 4 in the tappet body 7. In fact, the support body 4 is held in both longitudinal directions and any relative rotation between the support body 4 and the tappet body 7 is prevented.
As an alternative embodiment (not shown), the projections 21, 22 may comprise only said bulges 38, 39 as first longitudinal holding means 24, 25.
Claims (9)
1. A cam follower roller device (1) comprising:
-a tappet (2) extending along a longitudinal axis (X2) and comprising a cylindrical tappet body (7) defining a bore (10b), and
-a rolling assembly (3) arranged in said hole (10b) and comprising a support body (4), a pin (5) and a roller (6), said support body (4) having a base (13) and two longitudinal flanges (14, 15) extending longitudinally from said base (13) in said hole (10b) of the tappet body (7), said pin (5) being centered on a transverse axis (X5) and comprising two opposite ends (18, 19), each of these two opposite ends (18, 19) being adapted to be supported by said flanges (14, 15) of the support body (4), said roller (6) being rotatably mounted on said pin (5) about said transverse axis (X5),
it is characterized in that the preparation method is characterized in that,
-said support body (4) is provided with at least one elastically deformable projection (21, 22), said projection (21, 22) extending longitudinally from said base (13) of the support body (4) within said hole (10b) of the tappet body (7) and comprising first longitudinal retaining means (24, 25, 38, 39), and
-the tappet body (7) comprises means (28, 29, 40, 41) cooperating with the first longitudinal retention means (24, 25, 38, 39),
the first longitudinal retention means (24, 25) provided to the boss (21, 22) comprise at least one outwardly projecting portion (26, 27, 38, 39) extending transversely from the boss (21, 22) towards the tappet body (7).
2. A cam follower roller apparatus according to claim 1, wherein the outwardly projecting portion of the boss (21, 22) comprises a transverse flange (24, 25) having a transverse lower surface.
3. A cam follower roller apparatus according to claim 1, wherein said outwardly protruding portion of the boss (21, 22) comprises a bulge (38, 39).
4. A cam follower roller device according to any of claims 1 to 3, wherein the hole (10b) of the tappet body (7) comprises an inwardly protruding portion (28, 29), the inwardly protruding portion (28, 29) extending transversely from said hole (10b) towards the interior of the tappet body (7) and comprising an upper transverse surface (30, 31, 40, 41) cooperating with said first longitudinal retention means (24, 25, 38, 39) of the boss (21, 22).
5. A cam follower roller device according to claim 4, wherein said upper transverse surface is formed as an edge (30, 31) of said inwardly protruding portion (28, 29) of the tappet body (7).
6. A cam follower roller device according to claim 4, wherein the hole (10b) of the tappet body (7) comprises a recess (40, 41), the recess (40, 41) comprising an upper transverse surface cooperating with said first longitudinal retention means (38, 39) of the projection (21, 22).
7. A cam follower roller device according to claim 4, characterized in that the inwardly projecting portion (28, 29) of the tappet body (7) comprises a frustoconical surface (30, 31) dedicated to cooperating with a correspondingly shaped surface of the outwardly transverse flange (24, 25) of a boss (21, 22), said cooperating frustoconical surface being directed in a direction opposite to the phase of displacement of the removal of the support body (4) from the tappet body (7).
8. A cam follower roller device according to any of claims 1 to 3, characterized in that the tappet body (7) comprises second longitudinal retaining means (36, 37) for the rolling assembly (3), the pin (5) being arranged longitudinally between the first longitudinal retaining means (24, 25, 38, 39) of the protrusions (21, 22) cooperating with the hole (10b) of the tappet body (7) and the second longitudinal retaining means (36, 37) of the tappet body (7).
9. A cam follower roller apparatus according to claim 8, characterized in that the second longitudinal retention means of the tappet body (7) comprise at least one transverse portion (36, 37) extending from the cylindrical tappet body (7) towards the inside of the tappet body (7).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016207679.5A DE102016207679A1 (en) | 2016-05-04 | 2016-05-04 | Cam follower roller device |
| DE102016207679.5 | 2016-05-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107345491A CN107345491A (en) | 2017-11-14 |
| CN107345491B true CN107345491B (en) | 2021-04-16 |
Family
ID=60119231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710273408.XA Active CN107345491B (en) | 2016-05-04 | 2017-04-21 | Cam follower roller apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107345491B (en) |
| DE (1) | DE102016207679A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017212521A1 (en) * | 2017-07-20 | 2019-01-24 | Aktiebolaget Skf | Self-aligning cam follower roller device |
| DE102018128384B3 (en) * | 2018-11-13 | 2019-11-07 | Schaeffler Technologies AG & Co. KG | Roller tappet for a fuel pump |
| US10941737B2 (en) * | 2019-01-14 | 2021-03-09 | Koyo Bearings North America Llc | Follower mechanism with anti-rotation feature |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201206481Y (en) * | 2008-05-22 | 2009-03-11 | 重庆聚兴交通工业(集团)有限公司 | Valve clearance automatic compensation rocker for engine |
| CN103635663A (en) * | 2012-01-19 | 2014-03-12 | 日本精工株式会社 | Cam follower device |
| CN104114822A (en) * | 2012-02-10 | 2014-10-22 | 爱信精机株式会社 | Lash adjuster |
| EP2853697A1 (en) * | 2013-09-27 | 2015-04-01 | Aktiebolaget SKF | Mechanical system, injection pump and valve actuator comprising such a mechanical system and manufacturing method |
| CN104727876A (en) * | 2013-12-23 | 2015-06-24 | Skf公司 | Cam follower roller device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2946406B1 (en) | 2009-06-05 | 2016-07-01 | Skf Ab | FOLLOWING CAM ROLL DEVICE, IN PARTICULAR FOR A FUEL INJECTION PUMP. |
| FR2998629B1 (en) | 2012-11-29 | 2015-07-03 | Skf Ab | FOLLOWING ROLL DEVICE OF A CAM |
-
2016
- 2016-05-04 DE DE102016207679.5A patent/DE102016207679A1/en active Pending
-
2017
- 2017-04-21 CN CN201710273408.XA patent/CN107345491B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201206481Y (en) * | 2008-05-22 | 2009-03-11 | 重庆聚兴交通工业(集团)有限公司 | Valve clearance automatic compensation rocker for engine |
| CN103635663A (en) * | 2012-01-19 | 2014-03-12 | 日本精工株式会社 | Cam follower device |
| CN104114822A (en) * | 2012-02-10 | 2014-10-22 | 爱信精机株式会社 | Lash adjuster |
| EP2853697A1 (en) * | 2013-09-27 | 2015-04-01 | Aktiebolaget SKF | Mechanical system, injection pump and valve actuator comprising such a mechanical system and manufacturing method |
| CN104727876A (en) * | 2013-12-23 | 2015-06-24 | Skf公司 | Cam follower roller device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107345491A (en) | 2017-11-14 |
| DE102016207679A1 (en) | 2017-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9644729B2 (en) | Mechanical system forming a cam follower or a rocker arm, injection pump or valve actuator comprising such a mechanical system and method for manufacturing such a mechanical system | |
| US9551408B2 (en) | Mechanical system, injection pump and valve actuator comprising such a mechanical system and manufacturing method | |
| CN110344902B (en) | Cam follower, injection pump and valve actuator and method of manufacture | |
| US9772022B2 (en) | Mechanical system, injection pump and valve actuator comprising such a mechanical system and manufacturing method | |
| CN105649845B (en) | Mechanical system forming cam follower or rocker arm and method of making same | |
| US9933062B2 (en) | Mechanical system forming a cam follower or a rocker arm | |
| CN107345491B (en) | Cam follower roller apparatus | |
| EP2853699B1 (en) | Tappet, injection pump and valve actuator comprising such a tappet and manufacturing method for such a tappet | |
| US20160230868A1 (en) | Mechanical system forming a cam follower or a rocker arm, injection pump or valve actuator comprising such a mechanical system and method for manufacturing such a mechanical system | |
| CN106939804B (en) | Cam follower roller device with retention plug | |
| US9745934B2 (en) | Mechanical system forming a cam follower or a rocker arm | |
| CN107420146B (en) | Cam follower roller apparatus | |
| CN108006192B (en) | Cam follower roller apparatus | |
| CN107035590B (en) | Cam follower roller device with insert | |
| EP2853697B1 (en) | Mechanical system, injection pump and valve actuator comprising such a mechanical system and manufacturing method | |
| US10024201B2 (en) | Cam follower roller device with spacer | |
| EP3121436A1 (en) | Cam follower roller device and associated manufacturing method | |
| US10385956B2 (en) | Mechanical system forming a cam follower or a rocker arm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |