CN215861607U

CN215861607U - Novel high-strength powder metallurgy gear

Info

Publication number: CN215861607U
Application number: CN202120363032.3U
Authority: CN
Inventors: 杜少峰; 沈慧娟; 李飞凌; 傅奇骏
Original assignee: Yangzhou Xinle New Material Co ltd
Current assignee: Yangzhou Xinle New Material Co ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2022-02-18
Anticipated expiration: 2031-02-08

Abstract

The utility model relates to a novel high-strength powder metallurgy gear, wherein gear teeth are arranged around the gear, a contact angle between the tooth surface of each gear tooth and the tooth top surface of each gear tooth is of a round chamfer structure, a contact angle between the tooth surface of each gear tooth and the tooth root surface of each gear tooth is of a round chamfer structure, a shaft hole is arranged in the middle of the gear, and a key groove is arranged in the shaft hole.

Description

Novel high-strength powder metallurgy gear

Technical Field

The utility model relates to the field of powder metallurgy gears, in particular to a novel high-strength powder metallurgy gear.

Background

The manufacture of gear by powder metallurgy technique requires multiple processes of milling, forming, sintering, post-treatment, etc., wherein the forming process is to put powder material into a die and press-form under a certain pressure, and the gear refers to a mechanical element with gear on the rim for continuously engaging and transmitting motion and power. The gear manufactured by the powder metallurgy process can exactly reduce the production cost and ensure the consistency of the form and position and the dimensional tolerance of the gear. Powder metallurgy gears have a number of advantages over gears manufactured by machining, stamping, extrusion, precision casting, etc. of die casting, grey iron castings, forged and rolled materials, forgings, etc., while the strength of powder metallurgy gears is somewhat limited due to various manufacturing considerations.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem of insufficient strength of the existing powder metallurgy gear, the utility model provides a novel high-strength powder metallurgy gear.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a novel high strength powder metallurgy gear, is equipped with the gear tooth around the gear, the flank of tooth of gear tooth is round chamfer structure with the contact angle of the addendum face of gear tooth, the flank of tooth of gear tooth and the contact angle of root of tooth face are round chamfer structure, be equipped with the shaft hole in the middle of the gear, be equipped with two keyways in the shaft hole, the keyway symmetry sets up in the shaft hole, the terminal surface of gear is circular-arcly, the flank of tooth of gear tooth is concave-convex structure.

As can be seen from the above, the present invention has the following advantages compared with the prior art:

the utility model relates to a novel high-strength powder metallurgy gear, wherein the contact angle between the tooth surface and the tooth top surface of a gear tooth is a round chamfer structure, so that the gear can be conveniently meshed with the gear, the tooth surface is a concave-convex structure, so that the meshing strength can be enhanced, the integral strength of the gear can be enhanced by forming the end surface of the gear into a circular arc-shaped integral circle, most of the conventional gears are provided with grooves on the end surface of the gear in order to save materials, but the gear can generate fatigue when just rotating, and part of the gear adopts a material-saving structure of a shaft hole and a gear tooth middle step, the structure can be broken after long-time use, the gear is processed by the powder metallurgy technology, so that the whole structure is basically not damaged, the whole strength of the gear is improved, and the end face of the gear adopts a structure of a whole body with an arc-shaped end face, so that the whole strength structure of the gear is increased, and a small amount of materials can be saved.

Drawings

Fig. 1 is a front view structure diagram of the present invention.

Fig. 2 is a schematic structural view of a side view of the present invention.

In fig. 1 and 2, 1 is shaft hole, 2 is end face, 3 is tooth top face, 4 is tooth face, and 5 is tooth root face.

Detailed Description

As shown in fig. 1 and 2, a novel high strength powder metallurgy gear comprises shaft hole 1, terminal surface 2, addendum face 3, flank of tooth 4 and dedendum face 5, be equipped with the gear tooth around the gear, the flank of tooth 4 of gear tooth is the round chamfer structure with the contact angle of the addendum face 3 of gear tooth, the flank of tooth 4 of gear tooth is the round chamfer structure with the contact angle of dedendum face 5, be equipped with shaft hole 1 in the middle of the gear, be equipped with two keyways in shaft hole 1, the keyway sets up in shaft hole 1 symmetry, the terminal surface 2 of gear is circular-arc, the flank of tooth 4 of gear tooth is concave-convex structure.

Claims

1. The utility model provides a novel high strength powder metallurgy gear, its includes the gear, its characterized in that: be equipped with the gear tooth around the gear, the contact angle of the flank of tooth and the addendum face of gear tooth is round chamfer structure, the flank of tooth and the contact angle of dedendum face of gear tooth are round chamfer structure, be equipped with the shaft hole in the middle of the gear, be equipped with two keyways in the shaft hole, the keyway sets up in the shaft hole symmetry, the terminal surface of gear is circular-arcly, the flank of tooth is concave-convex structure.