CN203621396U

CN203621396U - Combined sand core for miniature vehicle four-cylinder body

Info

Publication number: CN203621396U
Application number: CN201320657397.2U
Authority: CN
Inventors: 袁熙淮; 杨友文; 邓中新; 刘云; 徐飞
Original assignee: Chongqing New Red Flag Cylinder Cap Manufacturing Co Ltd
Current assignee: Chongqing New Red Flag Cylinder Cap Manufacturing Co Ltd
Priority date: 2013-10-24
Filing date: 2013-10-24
Publication date: 2014-06-04
Anticipated expiration: 2023-10-24

Abstract

The utility model discloses a combined sand core for a miniature vehicle four-cylinder body, and relates to a casting technology. The upper and lower ends of a lower camshaft hole (2) of a miniature vehicle four-cylinder body sand core (1) are circular arc surfaces, and two lateral surfaces connected with the two ends of the circular arc surfaces at the upper and lower ends are perpendicular planes respectively, wherein a through hole (5) is formed in the center of a shaft of a camshaft sand core (3); the two ends of the shaft of the camshaft sand core (3) are pyramidal core heads (4); the upper and lower parts of the outer surface of the shaft of the camshaft sand core (3) form a circular arc surface, and two lateral surfaces connected with the circular arc surface are perpendicular planes respectively. According to the combined sand core, the two sides of the camshaft sand core form the perpendicular plans, the two sides of the camshaft hole of the miniature vehicle four-cylinder body sand core form the perpendicular planes, and the two sidewalls of the camshaft hole are thickened, so that the influence of great changes in the temperature of molten iron on the quality of the sand core during casting is eliminated, and the combined sand core has the characteristics of high casting yield, reduction in production cost and the like.

Description

Micro-car four cylinder body combination cores

Technical field

The utility model relates to foundry engieering, especially a kind of micro-car four cylinder body combination cores.

Background technology

When the micro-car four cylinder body of existing making, in body lower cam axis hole, be placed with cylindrical shape core, because casting finds that camshaft hole has shrinkage cavity, cinder hole often, percent defective is high, or camshaft hole axial line is monolateral, the weak point such as fine finishining difficulty after causing.

Summary of the invention

The purpose of this utility model is to provide a kind of simple in structure, can improve micro-car four cylinder body combination cores of yield rate.

The purpose of this utility model adopts technical scheme, the lower cam axis hole that comprises micro-car four cylinder body cores is equipped with camshaft core, the upper and lower side of the lower cam axis hole of its micro-car four cylinder body cores is arc-shaped surface, and the two sides that are connected with the arc surface two ends of upper and lower side are respectively vertical vertical plane; There is through hole at aforesaid camshaft core axle center, and the two ends of this camshaft core axle are taper core print, and the outer surface of camshaft core axle is arc-shaped surface up and down, and the two sides that are connected with this rounded face are respectively vertical vertical plane.

Further, above-mentioned camshaft core both sides are the distance of vertical plane and the cone lower end diameter of taper core print equates.

The utility model adopts camshaft core both sides to be vertical plane structure, also make the camshaft hole both sides of micro-car four cylinder body cores be vertical plane, camshaft hole both sides wall thickness is strengthened, in the time of casting, overcome molten iron temperature great change, affect core quality, qualified casting is high, and the feature such as reduce production costs.

Accompanying drawing explanation

Further illustrate the utility model below in conjunction with accompanying drawing.

Fig. 1 is the utility model structural representation;

Fig. 2 is camshaft sand core structure schematic diagram of the present utility model.

In figure: the micro-car four cylinder body core 2-camshaft hole 3-camshaft core 4-taper core print 5-through holes of 1-.

The specific embodiment

See Fig. 1, Fig. 2, the lower cam axis hole 2 that comprises micro-car four cylinder body cores 1 is equipped with camshaft core 3, the upper and lower side of the lower cam axis hole 2 of its micro-car four cylinder body cores 1 is arc-shaped surface, and the two sides that are connected with the arc surface two ends of upper and lower side are respectively vertical vertical plane; There is through hole 5 at aforesaid camshaft core 3 axle centers, and the two ends of these camshaft core 3 axles are taper core print 4, and the outer surface of camshaft core 3 axles is arc-shaped surface up and down, and the two sides that are connected with this rounded face are respectively vertical vertical plane.

[0011]further, above-mentioned camshaft core 3 both sides are the distance of vertical plane and the cone lower end diameter of taper core print 4 equates.

Claims

1. micro-car four cylinder body combination cores, the lower cam axis hole (2) that comprises micro-car four cylinder body cores (1) is equipped with camshaft core (3), the upper and lower side that it is characterized in that the lower cam axis hole (2) of aforesaid micro-car four cylinder body cores (1) is arc-shaped surface, and the two sides that are connected with the arc surface two ends of upper and lower side are respectively vertical vertical plane; There is through hole (5) at aforesaid camshaft core (3) axle center, the two ends of this camshaft core (3) axle are taper core print (4), the outer surface of camshaft core (3) axle is arc-shaped surface up and down, and the two sides that are connected with this rounded face are respectively vertical vertical plane.

2. the micro-car of one according to claim 1 four cylinder bodies combination cores, is characterized in that the distance that above-mentioned camshaft core (3) both sides are vertical plane equates with the cone lower end diameter of taper core print (4).