CN2473336Y

CN2473336Y - Ceramic mosaic swing arm for car engine

Info

Publication number: CN2473336Y
Application number: CN 01201332
Authority: CN
Inventors: 徐燕申; 林彬; 肖学福; 刘全忠; 胡军
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2001-02-13
Filing date: 2001-02-13
Publication date: 2002-01-23
Anticipated expiration: 2011-02-13

Abstract

The utility model discloses a ceramics embedded block rocking arm used in the engine of a sedan. The utility model is characterized in that the arc-shaped working plane part of an alloy rocking arm basal body die casts and joints the ceramics embedded block; the internal part of the shaft hole of the alloy rocking arm basal body is not provided with a copper sleeve and the bottom of the shaft hole has a lower rib plate. The left and right laterals of the rib plate on the alloy rocking arm basal body are correspondingly provided with a vertical tilting-shaped body. The utility model has the advantages as follows: 1. the friction lifetime of the utility model and a convex wheel axle is improved by five to six times than the publicly known rocking arm; 2. the utility model can obviously reduce the rotating inertia of the rocking arm and the equivalent mass of an air distributing mechanism, and improve the dynamic property of the engine as well as reduce fuel oil consumption; 3. the utility model greatly reduces the manufacturing cost.

Description

The ceramic insert rocking arm that is used for motorcar engine

The utility model relates to a kind of ceramic insert rocking arm that is used for motorcar engine.

The present known rocking arm that is used for motorcar engine, big of its matrix is the steel forgings of quenching with Subsequent tempering, is pressed into copper sheathing in its axis hole, the circular arc working surface on the rocking arm adopts multiple complicated technologies such as high frequency hardening, grinding, polishing, hard chromium plating to finish.The rocking arm of this structure, though have enough rigidity and fatigue strength, axis hole is also more wear-resisting, has following deficiency: one, the circular arc working surface wears no resistance, and often because of rocking arm matrix hardness deficiency, coating can produce and cut under the impact condition; Its two because rocking arm quality and rotary inertia are bigger, directly influence the dynamic response of motor, the rotating speed of motor and power are improved are restricted; Its three, the whole manufacturing process complexity of rocking arm, cost is higher.

The purpose of this utility model is to overcome the deficiency in the known technology and provides that a kind of circular arc working surface wear resistance is good, low cost of manufacture, can improve the dynamic response of motor and improve the ceramic insert rocking arm that is used for motorcar engine of output power.

The purpose of this utility model is achieved in that

Connect the full ceramic insert that contains the structure of falling the angle of wedge in the die casting of the circular arc working surface position of aluminum alloy rocking arm matrix, in aluminum alloy rocking arm matrix axis hole, exempt to adorn copper sheathing, its axis hole below is shaped on lower web plate, and the left and right sides correspondence of gusset on the aluminum alloy rocking arm matrix is made up-and-down inclined shape.

The utility model has following accompanying drawing:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the plan structure schematic representation of Fig. 1.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail:

The utility model is loaded in the distribution device (structural representation is not provided) of motorcar engine, its circular arc working surface and valve cam constitute a pair of friction pair.With reference to Fig. 1, connect the full ceramic insert 2 that contains the structure of falling the angle of wedge in the die casting of the circular arc working surface position of aluminum alloy rocking arm matrix 1, this simple mechanical connection structure has not only obviously improved the wear-out life of rocking arm and cam, alleviated the rotary inertia of rocking arm, improved the dynamic response of motor, and can save known multiple processing technology operation to the circular arc working surface, enhance productivity greatly and reduce manufacture cost.Connect above-mentionedly, in order to reduce stress concentration degree of the present utility model, Optimal Structure Designing is carried out in the utilization finite element analysis.Making every effort to exempt to adorn copper sheathing in the axis hole 4 on the aluminum alloy rocking arm matrix under the situation simple in structure, below its axis hole, be shaped on lower web plate 3, carry out the part and strengthen.Refer again to Fig. 2, aluminum alloy rocking arm matrix top also is shaped on gusset 5, left and right sides correspondence of gusset is made the structure of up-and-down inclined shape on it, the flexural center of aluminum alloy rocking arm matrix is overlapped with the loading center, obviously reduced the torsional deflection at rocking arm circular arc working surface position, avoid the eccentric wear between cam and the rocking arm, guaranteed aluminum alloy rocking arm matrix and the full connection reliability that contains between the ceramic insert.

Advantage and the good effect that the utlity model has are: 1. the utility model and camshaft The wearing and tearing life-span than adopting known rocking arm to improve 5-6 times; 2. can obviously reduce rocking arm The equivalent mass of rotary inertia and distribution mechanism is improved the dynamic characteristics of engine, reduces combustion Oil consumes; 3. manufacturing cost greatly reduces.

Claims

1. ceramic insert rocking arm that is used for motorcar engine, form by the rocking arm matrix that has circular arc working surface, axis hole and stiffening rib, it is characterized in that: connect the full ceramic insert that contains the structure of falling the angle of wedge in the die casting of the circular arc working surface position of aluminum alloy rocking arm matrix, in the aluminum alloy rocker shaft hole, exempt to adorn copper sheathing, its axis hole below is shaped on lower web plate, and the left and right sides correspondence of gusset on the aluminum alloy rocking arm matrix is made up-and-down inclined shape.