CN215861606U

CN215861606U - Powder metallurgy gear convenient to change

Info

Publication number: CN215861606U
Application number: CN202120362025.1U
Authority: CN
Inventors: 杜少锋; 沈慧娟; 贺小远; 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 powder metallurgy gear convenient to replace, wherein gear teeth are arranged around the gear, a shaft hole is arranged in the middle of the gear, one end of the shaft hole is large in diameter, the other end of the shaft hole is small in diameter, and at least two key grooves are arranged in the shaft hole.

Description

Powder metallurgy gear convenient to change

Technical Field

The utility model relates to the field of powder metallurgy gears, in particular to a powder metallurgy gear convenient to replace.

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 powder metallurgy gear which is convenient to replace.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a powder metallurgy gear convenient to change is equipped with the gear tooth around the gear, be equipped with the shaft hole in the middle of the gear, the one end in shaft hole is the heavy-calibre, the size of the heavy-calibre in shaft hole is greater than the size of axle, the other end in shaft hole is small-bore, the size of the small-bore in shaft hole is less than the size of heavy-calibre when being greater than the size of axle, be equipped with two at least keyways in the shaft hole.

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

according to the powder metallurgy gear convenient to replace, the gear is installed on the shaft, the large fixing block is knocked in from the key groove at the large caliber of the gear and matched with the key groove on the shaft, the small fixing block is knocked in from the key groove at the small caliber of the gear and matched with the key groove on the shaft, the gear can be firmly fixed on the shaft, the small fixing block is knocked out from the key groove at the large caliber by using the hammer when the gear needs to be disassembled, and the large fixing block is knocked out from the key groove at the small caliber.

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.

Fig. 3 is a schematic view of the structure of the present invention mounted on a shaft.

In fig. 1, 2 and 3, 1 is a gear, 2 is a gear tooth, 3 is a large caliber, 4 is a small caliber, 5 is a key groove, 6 is a shaft, 7 is a large fixed block, and 8 is a small fixed block.

Detailed Description

As shown in fig. 1, 2 and 3, a powder metallurgy gear convenient to replace comprises a gear 1, gear teeth 2, a large caliber 3, a small caliber 4, a key groove 5, a shaft 6, a large fixed block 7 and a small fixed block 8, wherein the gear teeth 2 are arranged around the gear 1, a shaft hole is arranged in the middle of the gear 1, one end of the shaft hole is the large caliber 3, the size of the large caliber 3 of the shaft hole is larger than that of the shaft 6, the other end of the shaft hole is the small caliber 4, the size of the small caliber 4 of the shaft hole is larger than that of the shaft 6 and is smaller than that of the large caliber 3, four key grooves 5 are arranged in the shaft hole, the gear 1 is installed on the shaft 6, the large fixed block 7 is knocked into the key groove 5 at the large caliber 3 of the gear 1 to be matched with the key groove 5 on the shaft 6, the small fixed block 8 is knocked into the key groove 5 at the small caliber 4 of the gear 1 to be matched with the key groove 5 on the shaft 6, the gear 1 can be firmly fixed on the shaft 6, when the tool needs to be disassembled, the hammer is used for knocking out the small fixed block 8 from the key groove 5 at the large caliber 3, and the large fixed block 7 is knocked out from the key groove 5 at the small caliber 4.

Claims

1. The utility model provides a powder metallurgy gear convenient to change, its includes the gear, its characterized in that: be equipped with the gear tooth around the gear, be equipped with the shaft hole in the middle of the gear, the one end in shaft hole is the heavy-calibre, the size of the heavy-calibre in shaft hole is greater than the size of axle, the other end in shaft hole is small-bore, be less than the size of heavy-calibre when the size of the small-bore in shaft hole is greater than the size of axle, be equipped with two at least keyways in the shaft hole.