CN209704658U - A kind of cam follower assembly - Google Patents

Abstract

The utility model discloses a kind of cam follower assemblies, including connecting shaft, injection cam driven member and two valve cam driven members, the injection cam driven member and valve cam follower include slave arm and idler wheel, and one end and the connecting shaft of the slave arm are rotatably connected；It is equipped with idler wheel accommodation groove in the other end of slave arm, a support shaft is equipped in accommodation groove；The idler wheel uses band sealed-bearing, which is set in support shaft, and tightly fits in together with support shaft, and outer ring protrudes from accommodation groove, and all has gap between the two sides with sealed-bearing and the two sidewalls of accommodation groove；It is equipped with a ball cup away from the side of accommodation groove in the one end of slave arm far from connecting shaft, the ball cup is equipped with a ball-and-socket for matching with the bulb end of push rod.The utility model structure is simple, easy to process, and assembles more convenient to use, can be effectively reduced production cost.

Description

A kind of cam follower assembly

Technical field

The utility model relates to technical field of engines more particularly to a kind of cam follower assemblies.

Background technique

Engine valve actuating mechanism be according to the requirement of the working cycles and ignition order carried out in each cylinder of engine, Time opening and the inlet and outlet door for closing each cylinder, enable fresh combustion mixture or air to timely enter cylinder, exhaust gas It is able to be discharged from cylinder in time.In compression and the sealing in working stroke, closing valve guarantee combustion chamber.Valve overhead type is mesh A kind of preceding most widely used valve actuating mechanism pattern.In this valve actuating mechanism, intake and exhaust valves are assembled into cylinder head On, valve train group is generally made of rocker arm, rocker arm shaft, push rod, tappet, camshaft etc..When the working cycles of cylinder need by When valve opening is taken a breath, crankshaft is rotated by transmission mechanism drive cam shaft, and the cam on camshaft is made to push rocker arm pendulum Turn, the other end of rocker arm just pushes downwards valve open.

Tappet used in engine valve actuating mechanism is mostly roller tappet at present, and the bulb end of push rod is inserted into tappet ball-and-socket In, the connection that is achieved between push rod and roller tappet.But often there is the problem of bucket surface wear, causes machine in such structure Body and tappet cooperation are bad, and are oriented to arrangement and need certain space, often occur guide groove using guide pin and pin is worn, very To fracture, tappet failure is caused.

For this purpose, 205477794 U of CN discloses a kind of cam follower comprising camshaft follower ontology, camshaft One end of driven member ontology is equipped with the axis hole of perforation two sides, and the other end of camshaft follower ontology is rotatably equipped with idler wheel, rolls The pivot center of wheel and the centerline parallel of axis hole, camshaft follower ontology are equipped with idler wheel one end and are equipped with ball cup, ball Headstock is equipped with the ball-and-socket for connecting ball head of pushing rod end.Although the program can replace tappet, solve between push rod and tappet Leading to the problem of friction leads to entire valve train group stability difference, but it also has the disadvantage that

1, driven member integrally assembles very troublesome, and especially roller shaft after mounting, is not put the positioning of roller shaft very much Just, so that the assembly efficiency of driven member is lower；

2, in the course of work, due to the vibration of engine or the shake of car body, idler wheel is be easy to cause to slide axially along it, into And cause to generate friction between idler wheel and driven member, it is not only also easy to produce noise, and be easy to cause the damage of idler wheel and driven member.

3, in assembling process, all driven members are installed in same shaft the program, in this way, causing during the installation process It needs to occupy biggish space, and assembles and be more troublesome, need to be accurately positioned the position of each driven member.

4, it needs that several oil ducts are arranged on driven member, to be lubricated, cool down to idler wheel in the course of work, makes again in this way Extremely complex at the structure of driven member, processing is very troublesome, considerably increases the processing cost of driven member.

Utility model content

In view of the above shortcomings of the prior art, utility model aims to solve existing cam follower structures The problem of complexity, production and processing trouble, assembly precision requirement is high, high production cost, provides a kind of cam follower assembly, structure Simply, easy to process, and assemble more convenient to use, it can be effectively reduced production cost.

In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is such that a kind of cam follower Assembly, it is characterised in that: including connecting shaft, injection cam driven member and two valve cam driven members, wherein injection cam is driven Part and two valve cam driven members are rotatablely connected with connecting shaft, and injection cam driven member be located at two valve cam driven members it Between；

The injection cam driven member and valve cam follower include slave arm and idler wheel, one end of the slave arm It is rotatably connected with the axis hole passed through for connecting shaft, and by the axis hole with connecting shaft；It is set in the other end of slave arm Have idler wheel accommodation groove, be respectively equipped with a mounting hole on the two sidewalls of accommodation groove, and the axial line of two mounting holes be overlapped and with even The axis parallel of spindle；A support shaft is equipped in accommodation groove, the both ends of the support shaft are located in two mounting holes；Institute It states idler wheel and uses band sealed-bearing, which is set in support shaft, and tightly fits in together with support shaft, outer ring Accommodation groove is protruded from, and all has gap between the two sides with sealed-bearing and the two sidewalls of accommodation groove；

It is equipped with a ball cup, is set on the ball cup away from the side of accommodation groove in the one end of slave arm far from connecting shaft There is a ball-and-socket for matching with the bulb end of push rod.

This programme structure is simple, by the way that an injection cam driven member and two valve cam driven members are connected with connecting shaft Assembly is formed, so that more convenient, simple in assembly practical process.Also, idler wheel uses band sealed-bearing, in this way, idler wheel Rolling effect it is more preferable, and without being lubricated by setting oil duct to idler wheel, to greatly simplify entire driven member Structure, and assemble also more convenient.Meanwhile there is gap between band sealed-bearing and accommodation groove two sidewalls, so as to avoid Friction is generated, the generation of noise is greatly reduced, also improves the stability and service life of entire assembly.

Further, the support shaft includes central siphon, and both ends are respectively equipped with an outer limit plate；It is fixed that two are equipped in central siphon Position axis, is equipped with the through-hole passed through for locating shaft on two outer limit plates；A reset spring is equipped between two locating shafts, multiple Under the action of the spring of position, two locating shafts stretch out after being each passed through the through-hole on two outer limit plates from the both ends of central siphon, and press two Locating shaft can make to move in two positioning axial direction central siphons, until concordant with the outside of outer limit plate.

By adopting the above technical scheme, in driven member assembling process, it now is fixed to the support shaft connection with sealed-bearing, so Locating shaft need to be only pressed afterwards, make its compression reseting spring, and in retraction support shaft, then support shaft is put into accommodation groove, and move Dynamic support shaft makes its both ends and accommodates the mounting hole face in groove sidewall, and at this moment, locating shaft is stretched under the action of reset spring Out, and enter in mounting hole, to realize the assembly of idler wheel, support shaft and slave arm；It entirely assembles more convenient, quick.

Further, in the inner end of two locating shafts, limit plate in one is further respectively had, under the action of reset spring, institute Interior limit plate is stated to be close together with outer limit plate.In such manner, it is possible to effectively be limited to locating shaft, to avoid locating shaft It is whole to be stretched out from through-hole, it influences to assemble.

Further, in support shaft, the corresponding position with sealed-bearing two sides is respectively equipped with a card around it Slot, cooperation is equipped with a positioning jump ring in two card slots.In such manner, it is possible to the position with sealed-bearing is effectively ensured, prevent its because Engine luggine, vehicle shake etc. and generate displacement, to greatly improve the stability of entire assembly.

Further, the ball-and-socket is hemispherical, and depth is consistent with the radius at bulb end of push rod；In this way, can make to push away It is formed between the bulb end of bar and ball-and-socket and asks hinged, push rod of being more convenient for is freely rotated.

Further, the injection cam driven member and two valve cam driven members are close together, right in connecting shaft It answers two valve cam driven members to be away from each other the position of side, is also respectively equipped with positioning card Huang.In this way, can not only be effectively reduced The entire occupied space of assembly, and effectively each driven member can be limited, convenient for quickly attaching it to engine On body.

Further, lubricant grease is filled in band sealed-bearing；To make band sealed-bearing form self-lubricating, avoid Design oil leab etc., can effectively simplify the structure of slave arm.

Further, the both ends of the connecting shaft are shaped to flat, are set respectively on two flat ends of connecting shaft There is an installation screw；So as to quickly attach it on engine body.

Compared with prior art, the utility model has the advantages that structure is simple, easy to process, and assembles use It is more convenient, it can be effectively reduced production cost.

Detailed description of the invention

Fig. 1 is the main view of the utility model.

Fig. 2 is the rearview of the utility model.

In figure: 1-connecting shaft, 2-injection cam driven members, 3-valve cam driven members, 4-slave arms, 5-accommodatings Slot, 6-support shafts, 7-band sealed-bearings, 8-ball-and-sockets, 9-circlips, 10-installation screws.

Specific embodiment

Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail.

Embodiment: referring to Fig. 1, Fig. 2, a kind of cam follower assembly, including connecting shaft 1, injection cam driven member 2 and two Valve cam driven member 3；Wherein, injection cam driven member 2 and two valve cam driven members 3 are rotatablely connected with connecting shaft 1, and Injection cam driven member 2 is between two valve cam driven members 3.The injection cam driven member 2 and two valve cams are driven Part 3 is close together, and in connecting shaft 1, corresponding two valve cam driven members 3 are away from each other the position of side, is also respectively equipped with one Positioning card is yellow.In this way, the occupied space of entire assembly can not only be effectively reduced, and effectively each driven member can be carried out Limit, convenient for quickly attaching it on engine body.

The injection cam driven member 2 and valve cam follower 3 include slave arm 4 and idler wheel.The slave arm 4 One end has the axis hole passed through for connecting shaft 1, and is rotatably connected by the axis hole with connecting shaft 1.In the another of slave arm 4 One end is equipped with idler wheel accommodation groove 5, and a mounting hole, and the axial line weight of two mounting holes are respectively equipped on the two sidewalls of accommodation groove 5 Merge the axis parallel with connecting shaft 1.A support shaft 6 is equipped in accommodation groove 5, the both ends of the support shaft 6 are located at In two mounting holes.When it is implemented, the support shaft 6 includes central siphon, both ends are respectively equipped with an outer limit plate；Wherein, described Outer limit plate and central siphon are fixed together by screw.It is equipped with two locating shafts in central siphon, is all provided on two outer limit plates There is the through-hole passed through for locating shaft；A reset spring, under the action of reset spring, two locating shafts are equipped between two locating shafts It is stretched out after being each passed through the through-hole on two outer limit plates from the both ends of central siphon, and press two locating shafts to make two positioning axial direction central siphons Interior movement, until concordant with the outside of outer limit plate.Using the technical solution, in driven member assembling process, now with oil sealing Bearing 7 is fixedly connected with support shaft 6, then need to only press locating shaft, makes its compression reseting spring, and in retraction support shaft 6, then Support shaft 6 is put into accommodation groove 5, and mobile support shaft 6, makes the mounting hole face on its both ends and 5 side wall of accommodation groove, this When, locating shaft stretches out under the action of reset spring, and enters in mounting hole, to realize idler wheel, support shaft 6 and slave arm 4 assembly；It entirely assembles more convenient, quick.In the inner end of two locating shafts, limit plate in one, the interior limit are further respectively had Position plate is molded as one with locating shaft；Under the action of reset spring, the interior limit plate is close together with outer limit plate.This Sample can effectively limit locating shaft, to avoid locating shaft is whole from stretching out from through-hole, influence to assemble.

The idler wheel uses band sealed-bearing 7, is filled with lubricant grease in band sealed-bearing 7；To make band oil seal shaft 7 formation self-lubricatings are held, design oil leab etc. is avoided, can effectively simplify the structure of slave arm 4.7 sets of the band sealed-bearing It is located in support shaft 6, and is tightly fitted in together with support shaft 6, outer ring protrudes from accommodation groove 5, and the two sides with sealed-bearing 7 Gap is all had between the two sidewalls of accommodation groove 5.When it is implemented, in support shaft 6, it is corresponding with 7 two sides of sealed-bearing Position is respectively equipped with a card slot around it, and cooperation is equipped with a positioning jump ring 9 in two card slots.In such manner, it is possible to effectively protect The position with sealed-bearing 7 is demonstrate,proved, prevents it from generating displacement because of engine luggine, vehicle shake etc., to greatly improve entire The stability of assembly.

A ball cup, the ball cup are equipped with away from the side of accommodation groove 5 in the one end of slave arm 4 far from connecting shaft 1 It is equipped with a ball-and-socket 8 for matching with the bulb end of push rod.The ball-and-socket 8 is hemispherical, the bulb of depth and push rod The radius at end is consistent；Ask hinged in this way, can make to be formed between the bulb end of push rod and ball-and-socket 8, push rod of being more convenient for is freely rotated.

The both ends of the connecting shaft 1 are shaped to flat, are respectively equipped with an installation on two flat ends of connecting shaft 1 Screw hole 10；So as to quickly attach it on engine body.

This programme structure is simple, by by an injection cam driven member 2 and two valve cam driven members 3 and connecting shaft 1 It is connected to form assembly, so that more convenient, simple in assembly practical process.Also, idler wheel uses band sealed-bearing 7, in this way, The rolling effect of idler wheel is more preferable, and without being lubricated by setting oil duct to idler wheel, to greatly simplify entire driven The structure of part, and assemble also more convenient.Meanwhile there is gap between band sealed-bearing 7 and 5 two sidewalls of accommodation groove, thus Generation friction is avoided, the generation of noise is greatly reduced, also improves the stability and service life of entire assembly.

Finally, it should be noted that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application technology Scheme, those skilled in the art should understand that, those are modified to the technical solution of the utility model or are equal Replacement, without departing from the objective and range of the technical program, should all cover in the scope of the claims of the utility model.

Claims (8)

1. a kind of cam follower assembly, it is characterised in that: driven including connecting shaft, injection cam driven member and two valve cams Part, wherein injection cam driven member and two valve cam driven members are rotatablely connected with connecting shaft, and injection cam driven member position Between two valve cam driven members；

The injection cam driven member and valve cam follower include slave arm and idler wheel, and one end of the slave arm has It is rotatably connected for the axis hole that connecting shaft passes through, and by the axis hole with connecting shaft；Rolling is equipped in the other end of slave arm Accommodation groove is taken turns, a mounting hole is respectively equipped on the two sidewalls of accommodation groove, and the axial line of two mounting holes is overlapped and and connecting shaft Axis parallel；A support shaft is equipped in accommodation groove, the both ends of the support shaft are located in two mounting holes；The rolling Using band sealed-bearing, which is set in support shaft wheel, and tightly fits in together with support shaft, outer ring protrusion Gap is all had between the two sidewalls of two sides and accommodation groove in accommodation groove, and with sealed-bearing；

It is equipped with a ball cup away from the side of accommodation groove in the one end of slave arm far from connecting shaft, the ball cup is equipped with one The ball-and-socket matched for the bulb end with push rod.

2. a kind of cam follower assembly according to claim 1, it is characterised in that: the support shaft includes central siphon, Both ends are respectively equipped with an outer limit plate；It is equipped with two locating shafts in central siphon, is equipped on two outer limit plates and is passed through for locating shaft Through-hole；A reset spring is equipped between two locating shafts, under the action of reset spring, two locating shafts are each passed through outside two and limit It is stretched out after through-hole on the plate of position from the both ends of central siphon, and press two locating shafts to make to move in two positioning axial direction central siphons, until with The outside of outer limit plate is concordant.

3. a kind of cam follower assembly according to claim 2, it is characterised in that: in the inner end of two locating shafts, also divide Not She You limit plate in one, under the action of reset spring, the interior limit plate is close together with outer limit plate.

4. a kind of cam follower assembly according to claim 1, it is characterised in that: in support shaft, corresponding band oil sealing The position of bearing two sides is respectively equipped with a card slot around it, and cooperation is equipped with a positioning jump ring in two card slots.

5. a kind of cam follower assembly according to claim 1, it is characterised in that: the ball-and-socket is hemispherical, depth It spends consistent with the radius at bulb end of push rod.

6. a kind of cam follower assembly according to claim 1, it is characterised in that: the injection cam driven member and two Valve cam driven member is close together, and in connecting shaft, corresponding two valve cam driven members are away from each other the position of side, also divides It She You not positioning card Huang.

7. a kind of cam follower assembly according to claim 1, it is characterised in that: filled with profit in band sealed-bearing Lubricating oil rouge.

8. a kind of cam follower assembly according to claim 1, it is characterised in that: the both ends of the connecting shaft are shaped to It is flat, an installation screw is respectively equipped on two flat ends of connecting shaft.