CN2465929Y

CN2465929Y - Elastic tie bar nut of injection molding machine

Info

Publication number: CN2465929Y
Application number: CN 01210883
Authority: CN
Inventors: 舒行豪; 鲍孝勇; 刘宏健; 徐卫甫
Original assignee: 夏善海
Priority date: 2001-02-28
Filing date: 2001-02-28
Publication date: 2001-12-19
Anticipated expiration: 2011-02-28

Abstract

The utility model relates to an elastic tie bar nut of an injection molding machine, particularly the elastic pull rod nut which is used with a pull rod on an injection molding machine; the utility model can prevent the pull rod from sharing large tonnage force, and the fracture phenomenon or the broken phenomenon which are caused by fatigue loading and stress concentration are prevented from occurring. The utility model is composed of a screw hole of which the middle diameter is M, the screw hole is a cone of which the height H is between 1 and 1.8m and the one end taper degree is between 1 to 3 and 1 to 4.5, the small end diameter d is between 1.2m and 1.6m, one end is a cylinder, the big end diameter D is between 2M and 3M, the height h is between 0.4M and 0.8M, and the utility model is formed by transiting the cone end and the cylinder end. The force is evenly shared by the screw thread section of the pull rod because the utility model is an elastic nut, the stress in the repeated sharing force is not easy to centralize, about 20 percent of the fatigue resistance coefficient is enhanced, the mechanical property of the pull rod is enhanced, and the trouble of replacing the pull rods and the economy loss can be relieved for manufacture plants.

Description

Injection machine elastic draw bar nut

The utility model relates to the vital part on a kind of injection machine, pull bar on particularly a kind of and the injection machine is used, can prevent that pull bar is subjected to the effect of large-tonnage power, rupture or the phenomenon that fractures employed injection machine elastic draw bar nut and concentrate generation because of fatigue loading, stress.

The nut that great majority use in the existing injection machine; all adopting general Rigid Fastener to connect part uses; but often because of pull bar is stressed very big, being the 100-2000 ton, also is not static stressed; but reciprocating frequence height, dynamic load that impulsive force is big; long-term use work, the concentrated phenomenon that makes pull bar fracture and damage of stress happens occasionally, and manufacturer have to shut down the transposing pull bar for this reason; both influence the production of factory, caused the economic loss of factory again.

The purpose of this utility model is to provide a kind of injection machine elastic draw bar nut, with the supporting use of the pull bar on the injection machine, will improve the mechanical performance of pull bar widely, prevent pull bar fracture, phenomenon fractures.

The utility model is achieved in that injection machine elastic draw bar nut is the screw of M by mid diameter, height H=1-1.8M, one end tapering is 1: the taper shape of 3-4.5, end diameter d=1.2-1.6M, one end is cylindrical, outside diameter D=2-3M, height h=0.4-0.8M, conical end and cylindrical end rounding off are formed.

Fig. 1. structural representation of the present utility model.

Fig. 2. user mode figure of the present utility model.

Fig. 3. nut stress figure.

Fig. 4. the stressed schematic diagram of nut.

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

Elastic draw bar nut (1) is the screw of M by mid diameter.Height H=1-1.8M, an end are that tapering is 1: the taper shape of 3-4.5, and end diameter d=1.2-1.6M, an end are cylindrical, outside diameter D=2-3M, height h=0.4-0.8M, and conical end and cylindrical end rounding off are formed.

During use,, have a groove, be convenient to the installation of elastic draw bar nut (1) in a plate (3) and pull bar (4), elastic draw bar nut (1) cooperation place.

Elastic draw bar nut (1) tightly is spun on the termination of pull bar (4), and is screwed elastic compression circle (2) on end face, and makes the face of cylinder of circular cone, cylindrical end junction be close to a plate (3).

The utility model is compared with prior art: so nut one end makes and draws for conical and be rounding off Bar thread segment stress equalization makes pull bar stress in repeatedly stressed be difficult for concentrating. Again because stressed back nut meeting Produce strain, make pull bar increase the length of nut segment, thereby make the tension of pull bar, bending resistance big The big improvement compared its endurance coefficient and rises about 20% with former nut, make the coefficient of concentration of pull bar from originally 4 reduce to about 2.5, thereby greatly improved the mechanical performance of pull bar, avoided the fracture of pull bar and fractureed Phenomenon can be kept the safety in production manufacturer, has exempted the economic loss of the trouble of transposing pull bar.

Claims

1. injection machine elastic draw bar nut, it is characterized in that by mid diameter being the screw of M, height H=1-1.8M, one end tapering is 1: the taper shape of 3-4.5, end diameter d=1.2-1.6M, an end are cylindrical, outside diameter D=2-3M, height h=0.4-0.8M, conical end and cylindrical end rounding off are formed.