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WO2019147113A1 - Guide pour insérer un verrou de retenue dans l'arbre à cames - Google Patents

Guide pour insérer un verrou de retenue dans l'arbre à cames Download PDF

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Publication number
WO2019147113A1
WO2019147113A1 PCT/MX2018/000009 MX2018000009W WO2019147113A1 WO 2019147113 A1 WO2019147113 A1 WO 2019147113A1 MX 2018000009 W MX2018000009 W MX 2018000009W WO 2019147113 A1 WO2019147113 A1 WO 2019147113A1
Authority
WO
WIPO (PCT)
Prior art keywords
guide
camshaft
retention
sheet
insurance
Prior art date
Application number
PCT/MX2018/000009
Other languages
English (en)
Spanish (es)
Inventor
Christian RANGEL PÉREZ
Original Assignee
Thyssenkrupp Components Technology De México, S.A. De C.V.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thyssenkrupp Components Technology De México, S.A. De C.V. filed Critical Thyssenkrupp Components Technology De México, S.A. De C.V.
Publication of WO2019147113A1 publication Critical patent/WO2019147113A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
    • B23P19/08—Machines for placing washers, circlips, or the like on bolts or other members
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like

Definitions

  • the present invention relates to the technical field of mechanics, and more specifically to the automaker, since it provides a guide for inserting a retention lock to the camshaft.
  • a camshaft is a mechanism formed by an axis in which different cams are placed, which can have different shapes and sizes, and are oriented differently to activate different mechanisms at repetitive intervals, such as valves. That is, it constitutes a cyclic mechanical timer, also called a mechanical programmer.
  • the shape of the camshaft is decisive for the behavior of the vehicle. This piece has a shape specifies that it gives a specific behavior to the engine. Depending on the camshaft, the valves may be open more or less time and the amount of valve opening may also vary.
  • the camshaft consists of an axis with a series of elements, among which are the aforementioned camones or cams that are prominences of the tree with a curvilinear section called "crest" of the camon, which is what acts on the taque and some support stumps on which it turns, whose number varies depending on the effort to be transmitted.
  • crest curvilinear section
  • the shaft rotates on friction bearings or on support drills made directly on the cylinder head material. It is lubricated through the lubrication circuit, through conduits that reach each of the supports.
  • the camshafts are manufactured in a single piece of cast iron or forged steel, must have great resistance to torsion and wear, for this, it is given a tempering treatment. The wear of the camshaft can mean a modification of the distribution diagram, resulting in a decrease in engine performance.
  • the application of the camshaft related to the alternative internal combustion engine is that it is the one that regulates both the opening and closing of the valves; The duration of this opening phase allows the renewal of the load in the phases of admission and escape of gases in the cylinders.
  • the camshaft drive is produced thanks to the motor distribution. In four-stroke vehicles, every two turns of the crankshaft there is a turn of the camshaft.
  • camshaft Depending on the placement of the camshaft and the distribution of these, they will directly actuate the valves through a rod as in the first period of Otto engines, SV system or they will do it by means of a system of rods, taqués and rockers, it is the OHV system. Subsequently, especially since the appearance of diesel engines, the camshaft has passed to the cylinder head, it is the so-called SOHC system.
  • V-engines can have 4 camshafts.
  • DOHC double overhead camshaft
  • the DOHC system allows, among other things, to mount 2 exhaust valves and 2 intake valves, in the 4 cylinders it is what is called "16 valves”.
  • valve Also called "side valve".
  • the valve In this system the valve is located in a lateral position to the cylinder, that is, it is housed in the block. The control of this valve is carried out with the camshaft located in the engine block.
  • This distribution system has not been used for a long time because of two main drawbacks: It forces the compression chamber to be larger, and the size of the valve heads is limited by the limited space available.
  • ® OHV system It is distinguished by having the camshaft in the engine block (generally in the lower sector) and the valves arranged in the cylinder head.
  • this system the transmission of movement from the crankshaft to the camshaft is done directly by means of two sprockets or with the interposition of a third, it can also be done by means of a short length chain.
  • the advantage of this system is that the transmission of movement between the crankshaft and the axle axis requires zero maintenance or after many kilometers.
  • the disadvantage is given by the high number of elements that make up this system to compensate for the distance between the camshaft and the valves. This inconvenience affects mainly at high engine revolutions, which implies a limit on the number of revolutions that these engines can reach.
  • This system is greatly influenced by the temperature of the engine, which makes a considerable clearance in the taqués necessary.
  • ® OHC System It is distinguished by having the camshaft in the cylinder head as well as the valves. It is the system most used today in all cars. The advantage of this system is that the number of elements between the camshaft and the valves is reduced considerably so that the opening and closing of the valves is more precise and faster. This brings with it that the engines can reach a greater number of revolutions. It has the disadvantage of complicating the transmission of crankshaft movement, since longer belts or distribution chains are needed, which with wear are worn out to a greater extent, requiring more maintenance. This system is generally more expensive and complex, but it is much more effective and you get better engine performance.
  • SOHC It consists of a single camshaft that operates the intake and exhaust valves
  • DOHC It is composed of two camshafts, one activating the intake valves and the other operating the exhaust valves.
  • the camshaft is fitted with at least one retention latch, in order to have a better operation and are intended to maintain lubrication and obtain impermeability to water and dust.
  • a technical patent search was conducted and it was found that there are several documents that describe various methods for camshaft assembly, as well as different equipment, as mentioned in the German patent application publication DE102012025442 (Al), published on June 26, 2014 with the title
  • PROCEDURE FOR ASSEMBLING A CAMSHAFT describes a procedure for assembling a camshaft consisting of a support shaft and components that will be attached to the support shaft, presenting the through-hole components to accommodate the support shaft.
  • a support tree is made available that has first widening of diameter in first areas, in which the components must be fixed, and has second widening of diameter in second areas, in which they must be previously positioned the components, the diameter in the second zones being smaller than the diameter in the first zones.
  • the support shaft is cooled and / or the components are heated, so that the support shaft with its first and second diameter widenings can be introduced through the through holes of the components.
  • the support shaft is inserted through the through holes, so that each component is assigned to a second zone.
  • the support shaft is heated and / or the components are cooled, so that the diameter of the through holes of the components is smaller than the diameter of the second diameter broadenings assigned.
  • a predetermined overlap of the components is created with the second zones assigned to the components, so that the components remain detachably fixed in the second assigned zones.
  • the components are mounted under pressure on the first widening of diameter assigned to them or the first widening of diameter are snapped into the assigned through holes of the components, respectively adjusting the required angular position of each component with respect to the support shaft before, during or after assembly or snap fit.
  • the object of the present invention to provide a guide for inserting a retention lock to the camshaft, which solves the aforementioned problems.
  • Figure 1 shows a top perspective view of the guide for inserting a retention lock to the camshaft.
  • Figure 2 shows a lower perspective view of the guide for inserting a retention lock to the camshaft.
  • Figure 3 shows a top view of the guide for inserting a retention lock to the camshaft.
  • Figure 4 shows a bottom view of the guide for inserting a retention latch to the tree
  • Figure 5 shows a side view of the guide for inserting a retention lock to the camshaft.
  • Figure 6 shows a top view of the guide for inserting a retention lock to the camshaft, showing how said tension insurance is accommodated.
  • the guide for inserting a retention lock to the camshaft is formed by a sheet (1) preferably prismatic and made of tempered steel with a hardness of 50 HRc; at one of the ends of said sheet (1) it has at least two smooth holes (2) by means of which a male element (not shown) is introduced in order to fix a position of the guide to insert a retention insurance to the camshaft, said male element can be a pin, pin, spike and / or the combination of the above.
  • At least two countersunk holes (3) are placed perpendicular to the smooth holes (2), and are configured so that the head of a screw is embedded in them with the purpose of fixing the guide to insert a retention insurance to the camshaft, avoiding any unwanted movement within the process of placing a retention insurance (4), which is of the "omega" type.
  • each side of the sheet (1) has a radial cut (5) leaving a configured tip (6) at the center of the sheet (1) to center and position the "omega” retention insurance.
  • the radial cuts (5) are arranged to adjust the "omega" retention latch, facilitating the sliding of the latch when closing and reducing friction between the components while reaching the shape to be assembled.
  • the guide for inserting a retention latch to the camshaft has a second radial cut (7), which is arranged to eliminate the stress concentration and avoid fractures in the sheet (1) of the reason guide of the present invention.
  • the guide for inserting a cam lock to the camshaft has a bevel (8) on the edge of the blade (1), which serves as a rail in the machine's feed guide that places the type "retention locks. omega ", said bevel (8) allows the guide to insert a retention lock to the camshaft of the present invention to move in a straight and precise manner, avoiding jams in the feed line.
  • the main function of the guide for inserting a camshaft retention latch is to keep the "omega" latch horizontally to be assembled and keep it in the "closed” position while assembling in the camshaft module, preventing the insurance is deformed and in this way there are no material jams within the insurance supply line, eliminating line stoppages and high waste of processed material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

La présente invention concerne un guide pour insérer un verrou de retenue dans l'arbre à cames, plus spécifiquement les verrous de retenue de type oméga ; la fonction principale dudit guide étant de maintenir le verrou "oméga" en position horizontale et fermé pour être assemblé dans le module de l'arbre à cames. La configuration du guide pour insérer un verrou de retenue dans l'arbre à cames permet d'éviter que les verrous de retenue ne se déforment et ne produisent ainsi des bouchons de matière dans la conduite d'alimentation de verrous, éliminant les arrêts de la conduite et la quantité élevée de gaspillage de matière traitée.
PCT/MX2018/000009 2018-01-29 2018-01-29 Guide pour insérer un verrou de retenue dans l'arbre à cames WO2019147113A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MXMX/A/2018/001253 2018-01-29
MX2018001253A MX2018001253A (es) 2018-01-29 2018-01-29 Guia para insertar un seguro de retencion al arbol de levas.

Publications (1)

Publication Number Publication Date
WO2019147113A1 true WO2019147113A1 (fr) 2019-08-01

Family

ID=67396083

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MX2018/000009 WO2019147113A1 (fr) 2018-01-29 2018-01-29 Guide pour insérer un verrou de retenue dans l'arbre à cames

Country Status (2)

Country Link
MX (1) MX2018001253A (fr)
WO (1) WO2019147113A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55120433A (en) * 1979-03-08 1980-09-16 Mitsubishi Motors Corp Method and device for try press
DD218581A1 (de) * 1983-05-20 1985-02-13 Karl Marx Stadt Tech Hochschul Fuegewerkzeug fuer die automatische montage von sicherungsringen
JPS63133928A (ja) * 1986-11-22 1988-06-06 松永　是 藍藻の海水での培養法
EP0386617A2 (fr) * 1989-03-08 1990-09-12 Chubu Bearing Kabushiki Kaisha Bague de retenue formée en E
JPH1190855A (ja) * 1997-09-12 1999-04-06 Myotoku Kk リング装着器
US20050262677A1 (en) * 2002-11-07 2005-12-01 Kouichi Tanaka Tool for installing retaining ring

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55120433A (en) * 1979-03-08 1980-09-16 Mitsubishi Motors Corp Method and device for try press
DD218581A1 (de) * 1983-05-20 1985-02-13 Karl Marx Stadt Tech Hochschul Fuegewerkzeug fuer die automatische montage von sicherungsringen
JPS63133928A (ja) * 1986-11-22 1988-06-06 松永　是 藍藻の海水での培養法
EP0386617A2 (fr) * 1989-03-08 1990-09-12 Chubu Bearing Kabushiki Kaisha Bague de retenue formée en E
JPH1190855A (ja) * 1997-09-12 1999-04-06 Myotoku Kk リング装着器
US20050262677A1 (en) * 2002-11-07 2005-12-01 Kouichi Tanaka Tool for installing retaining ring

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 282185, Derwent World Patents Index; AN 1999-282185 *

Also Published As

Publication number Publication date
MX2018001253A (es) 2019-07-30

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