CN212004157U

CN212004157U - Injection molding gear assembly

Info

Publication number: CN212004157U
Application number: CN202020429183.XU
Authority: CN
Inventors: 谭富明; 谢振东; 张寅虎; 戴永谦
Original assignee: Weihai Chongding Utopia Intelligent Equipment Co ltd
Current assignee: Weihai Chongding Utopia Intelligent Equipment Co ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-11-24
Anticipated expiration: 2030-03-30

Abstract

The utility model relates to a gear assembly moulds plastics, it has been solved current plastic gear and has been applied to the load light, the technical problem of the application occasion that the load is little, it is equipped with the gear of moulding plastics, main part skeleton and gear shaft, the main part skeleton is cavity cylinder profile modeling tooth, the gear shaft intermediate surface is equipped with the spline and is connected through the mode of moulding plastics with the main part skeleton, whole technology adopts injection moulding, fill the injection moulding material between main part skeleton and the gear shaft, main part skeleton surface is equipped with the profile modeling tooth, two adjacent profile modeling teeth adopt fillet transition, single profile modeling tooth root divides into 6 sections according to flank of tooth length on average, all adopt fillet rounding off in the middle of every section, the addendum circle size of profile modeling tooth. The utility model discloses can extensively be in need to use the industrial application field that plastic gear and load are big, the load is carried.

Description

Injection molding gear assembly

Technical Field

The utility model relates to a mechanical engineering technical field especially relates to a gear assembly moulds plastics.

Background

At present, plastic gears are applied to various industries such as micro motors, electronic products, automobile accessories, household appliances, office supplies, toys, artware and the like. Such as automobile rearview mirrors, headlamp adjusters, timers, micro-motors, reducers, printers, facsimile machines, cameras, DVD cartridges, paper shredders, copiers, massagers, toy cartridges, instruments, medical devices, vacuum cleaners, automatic coffee machines, etc., all use different combinations of gears.

Based on the above application fields, it can be found that the current plastic gear applications tend to be applied in light-load and low-load applications, and the industrial application fields are not sufficiently developed.

Disclosure of Invention

The utility model discloses a solve that current plastic gear is applied to the load light, the technical problem of the application occasion that the load is little provides a simple structure, and is practical convenient, the high gear assembly that moulds plastics of intensity.

The utility model provides a gear assembly moulds plastics, be equipped with the gear of moulding plastics, main part skeleton and gear shaft, the main part skeleton is cavity cylinder profile modeling tooth, the gear shaft intermediate surface is equipped with the spline and is connected through the mode of moulding plastics with the main part skeleton, whole technology adopts injection moulding, fill the injection molding material between main part skeleton and the gear shaft, main part skeleton surface is equipped with the profile modeling tooth, two adjacent profile modeling teeth adopt the fillet transition, single profile modeling tooth root is according to 6 sections of flank of tooth length average share, all adopt fillet rounding off in the middle of every section, the addendum circle size of profile modeling tooth, the number of teeth is the same with the relevant requirement.

Preferably, the root of the tooth core of the profiling tooth is provided with a notch.

Preferably, the main framework is made of metal.

Preferably, one end of the gear shaft is in a spline tooth-shaped structure, and the other end of the gear shaft is in an open slot inner hole structure.

Preferably, the gear shaft is made of metal.

Preferably, the injection-molded gear is made of nylon.

The utility model has the advantages that:

the utility model is provided with the main body framework matched with the gear shaft, thereby increasing the strength of the plastic gear; the spline grooves are formed in the outer surface of the gear shaft, so that the gear is tightly and firmly matched with the gear shaft after injection molding, and the problems that the gear shaft falls off and slips after the plastic gear is impacted by heavy load are solved; all designed some tooth cores to each profile of tooth, guaranteed the bulk strength of plastic gear on the one hand, on the other hand can reduce the shrink of plastic gear at the in-process tooth portion of moulding plastics, guarantees the precision of product, the utility model discloses be designed jaggedly at the tooth root position, guarantee at the in-process of moulding plastics, the material of moulding plastics can fill fast to the tooth chamber, guarantees full of whole die cavity.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a perspective view of the main body frame of the present invention;

FIG. 4 is a front view of the main frame of the present invention;

FIG. 5 is a left side view of the main body frame of the present invention;

FIG. 6 is a perspective view of the gear shaft of the present invention;

FIG. 7 is a front view of the gear shaft of the present invention;

fig. 8 is a left side view of the gear shaft of the present invention;

fig. 9 is a right side view of the gear shaft of the present invention.

Description of the symbols of the drawings:

1. a main body skeleton; 2. a tooth core; 3. a spline groove; 4. a notch; 5. a gear shaft; 6. a spline; 7. and (5) injection molding the gear.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, so that those skilled in the art can easily implement the present invention.

Example 1: as shown in figures 1-2, the utility model is provided with an injection molding gear 7, a main body framework 1 and a gear shaft 5, wherein the main body framework 1 is matched with the gear shaft 5. As shown in fig. 3-9, the main body frame 1 is a hollow cylindrical profile, the spline grooves 3 are formed in the main body frame 1, and the splines 6 are formed on the outer surface of the gear shaft 5, so that the splines 3 of the gear shaft 5 are tightly and firmly matched with the gear after the gear is subjected to injection molding, and the problem that the gear shaft 5 falls off and slips after the injection molding gear 7 is subjected to heavy load impact is solved. One end of the gear shaft 5 is in a spline tooth-shaped structure and is connected with an external structure, and the other end of the gear shaft is in an open slot inner hole structure.

According to the tooth profile requirement of the injection molding gear 7, the tooth core 2 is designed for each tooth profile, on one hand, the integral strength of the injection molding gear 7 is guaranteed, on the other hand, the shrinkage of the tooth portion of the injection molding gear 7 in the injection molding process can be reduced, the precision of a product is guaranteed, a single profiling tooth root is averagely divided into 6 sections according to the length of the tooth surface of the gear, the middle of each section is in round-corner smooth transition, the size and the number of addendum circles of the profiling teeth are the same as the related requirements of the injection molding gear, the addendum width of the profiling teeth is. The utility model discloses 2 root position designs in tooth core have breach 4, guarantee at the in-process of moulding plastics, and the material of moulding plastics can fill fast to the tooth chamber, guarantees full of whole die cavity. The required external dimensions of the gear are ensured by the injection mould.

The utility model discloses main part skeleton 1 is made for the metal, and this metal framework inlays inside the gear through injection moulding, as the support chassis of gear, and the gear material of moulding plastics is the nylon material, guarantees that performance index such as the intensity of gear in the use, reliability can satisfy the user demand.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, as various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the scope defined by the claims of the present invention shall be within the protection scope of the present invention.

Claims

1. The utility model provides a gear assembly moulds plastics, characterized by is equipped with the gear of moulding plastics, main part skeleton and gear shaft, the main part skeleton is cavity cylinder profile modeling tooth, the gear shaft intermediate surface be equipped with the spline with the main part skeleton is connected through the mode of moulding plastics, and whole technology adopts injection moulding, fills the injection molding material between main part skeleton and the gear shaft, main part skeleton surface is equipped with the profile modeling tooth, adjacent two the profile modeling tooth adopts fillet transition, singly the profile modeling tooth basis flank of tooth length averagely falls into 6 sections, all adopts fillet transition rounding off in the middle of every section, the addendum circle size, the number of teeth of profile modeling tooth are with the relevant requirement of the gear of moulding plastics.

2. The injection gear assembly of claim 1 wherein the contoured tooth core root is notched.

3. The injection molding gear assembly according to claim 2, wherein the main body framework is made of metal.

4. The injection molding gear assembly of claim 3, wherein one end of the gear shaft is of a spline tooth profile structure and the other end of the gear shaft is of an open slot inner bore structure.

5. The injection gear assembly of claim 4 wherein the gear shaft is made of metal.

6. The injection gear assembly of claim 5 wherein the injection gear is formed of nylon.