CN219274477U

CN219274477U - Closed maintenance-free powder metallurgy helical gear rotating device

Info

Publication number: CN219274477U
Application number: CN202223569035.6U
Authority: CN
Inventors: 曹玉海; 徐继平; 丁伟; 黄雁宇; 游进明; 郭益山
Original assignee: Jiangsu Yangzhou Hairong Powder Metallurgy Co ltd
Current assignee: Jiangsu Yangzhou Hairong Powder Metallurgy Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-30
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a closed maintenance-free powder metallurgy helical gear rotating device. The closed maintenance-free powder metallurgy helical gear rotating device comprises a rotatable middle die, an upper die assembly is arranged above the middle die, the upper die assembly comprises an upper base plate I, an upper inner punch is arranged on the bottom surface of the upper base plate I, an upper outer punch is sleeved on the outer side of the upper inner punch, a hanging table is arranged at the top of the upper outer punch, an upper cover plate fixedly connected with the upper base plate I is sleeved on the outer side of the hanging table, a guide mechanism is arranged on the outer side of the upper cover plate, the upper inner punch and the upper outer punch enter the middle die under the action of the guide mechanism, a lower die assembly is arranged below the middle die and comprises a lower die holder, a lower base plate is fixedly connected on the top surface of the lower die holder, and a lower punch meshed with the middle die is arranged on the top surface of the lower base plate and fixedly connected with the lower base plate through the lower cover plate. The utility model solves the problem that the prior art can not meet the production requirement of the helical gear with complex modeling.

Description

Closed maintenance-free powder metallurgy helical gear rotating device

Technical Field

The utility model relates to the technical field of powder metallurgy, in particular to a closed maintenance-free powder metallurgy helical gear rotating device.

Background

At present, when a die for pressing the helical gear green blank works, the upper punch and the lower punch rotate, and the middle die is kept motionless. However, this structure is only suitable for some helical gears with simple structures, such as helical gears with circular inner holes, and when helical gears with complex structures, such as irregular inner holes, are encountered, or bosses (or small holes) are arranged on the end surfaces of the helical gears around the inner holes, the existing structure cannot meet the production requirements.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a closed maintenance-free powder metallurgy helical gear rotating device capable of meeting the production requirements of complex-shaped helical gears.

In order to achieve the purpose, the technical scheme adopted by the closed maintenance-free powder metallurgy helical gear rotating device is as follows:

the utility model provides a closed maintenance-free powder metallurgy helical gear rotary device, including rotatable well mould, the top of well mould is provided with the mould subassembly, the mould subassembly includes upper padding plate one, the bottom surface of upper padding plate one is provided with interior dashing, the outside of interior dashing has been cup jointed and has been gone up the outer dashing, the top of going up the outer dashing is provided with the hanging platform, the upper cover plate with upper padding plate one rigid coupling has been cup jointed in the outside of hanging the platform, the outside of upper cover plate is provided with guiding mechanism, go up interior dashing and go up the outer dashing and get into well mould under guiding mechanism's effect, the below of well mould is provided with the lower mould subassembly, the lower mould subassembly includes the die holder, the top surface rigid coupling of die holder has the lower bolster, the top surface of lower bolster is provided with the undershoot with well mould meshing, the undershoot passes through lower cover plate and lower bolster rigid coupling.

Preferably, the guide mechanism comprises an upper base plate II, the upper base plate II is positioned above the upper base plate I, a plurality of guide posts are arranged on the bottom surface of the upper base plate II, the guide posts penetrate through the upper base plate I and are connected with a lifting plate, and the lifting plate is fixedly connected with a guide gear ring meshed with the upper outer punch.

Preferably, the lifting plate is provided with an adjusting rod, and the lower die holder is provided with a limiting rod for blocking the adjusting rod.

Preferably, a plurality of friction plates are arranged between the top surface of the hanging table and the first upper base plate, and a needle bearing is arranged between the bottom surface of the hanging table and the upper cover plate.

Compared with the prior art, the utility model has the following advantages:

1. when demoulding, the upper outer punch moves upwards and rotates to separate from the middle die, the lower die assembly is kept still, the middle die rotates and moves downwards, and a product is ejected out, so that the production requirement of the helical gear with the inner hole in a special-shaped complex shape is met.

2. The upper outer punch enters the middle die through the guide gear ring, so that the upper outer punch is prevented from being damaged due to collision with the tooth mouth of the middle die.

3. The adjusting rod abuts against the limiting rod, and the relative positions of the guide gear ring and the middle die are corrected, so that the upper outer punch is ensured to smoothly enter the middle die under the guide of the guide gear ring.

Drawings

FIG. 1 is a front view of a closed maintenance-free powder metallurgy helical gear rotating device of the present utility model;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

fig. 4 is a B-B cross-sectional view of fig. 2.

The middle die comprises a middle die 1, an upper die assembly 2, a first upper backing plate 21, an upper inner punch 22, an upper outer punch 23, a 231 hanging table, a 24 upper cover plate, a 25 friction plate, a 26 needle bearing, a 27 guide mechanism, a second 271 upper backing plate, a 272 guide pillar, a 273 lifting plate, a 274 guide gear ring, a 275 adjusting rod, a 35 limiting rod, a 3 lower die assembly, a 31 lower die holder, a 32 lower backing plate, a 33 lower punch, a 34 lower cover plate and a 35 limiting rod.

Detailed Description

The present utility model is further illustrated in the accompanying drawings and detailed description which are to be understood as being merely illustrative of the utility model and not limiting of its scope, since various equivalent modifications to the utility model will fall within the scope of the appended claims to the skilled person after reading the utility model.

As shown in fig. 1-4, a closed maintenance-free powder metallurgy helical gear rotating device comprises a rotatable middle die 1, an upper die assembly 2 is arranged above the middle die, the upper die assembly comprises a first upper base plate 21, an upper inner punch 22 is arranged on the bottom surface of the first upper base plate, the upper inner punch is hoisted on the first upper base plate through bolts, the outer side of the upper inner punch is sleeved with an upper outer punch 23, the top of the upper outer punch is integrally formed with a hanging table 231, the outer side of the hanging table is sleeved with an upper cover plate 24 fixedly connected with the first upper base plate, three friction plates 25 are arranged between the top surface of the hanging table and the first upper base plate, a needle bearing 26 is arranged between the bottom surface of the hanging table and the upper cover plate, thereby reducing friction force and facilitating rotation of the upper outer punch, a guide mechanism 27 is arranged on the outer side of the upper cover plate and comprises a second upper base plate 271 which is positioned above the first upper base plate, four guide posts 272 which are uniformly distributed circumferentially are arranged on the bottom surface of the upper base plate II, the guide posts penetrate through the upper base plate to be connected with a lifting plate 273, the central position of the lifting plate is fixedly connected with a guide gear ring 274 meshed with an upper outer punch, the upper inner punch and the upper outer punch enter the middle die under the action of the guide gear ring so as to avoid damage caused by mutual collision of tooth openings of the upper outer punch and the middle die, two sides of the lifting plate are provided with adjusting rods 275, a lower die holder is provided with a limiting rod 35 for blocking the adjusting rods, the adjusting rods are abutted against the limiting rod to correct the relative positions of the guide gear ring and the middle die, so that the upper outer punch is ensured to smoothly enter the middle die under the guide of the guide gear ring, a lower die assembly 3 is arranged below the middle die, the lower die assembly comprises a lower die holder 31, the top surface of the lower die holder is fixedly connected with a lower base plate 32, the top surface of the lower base plate is provided with a lower punch 33 meshed with the middle die, and the lower die is fixedly connected with the lower base through a lower cover plate 34.

The specific working process and principle of the utility model are as follows: after the powder filling of the middle die cavity is finished, the machine tool controls the upper die assembly to rapidly descend, after the adjusting rod abuts against the limiting rod, the relative position of the guide gear ring and the middle die is corrected, the upper base plate continuously moves downwards, the upper outer punch smoothly enters the middle die to press powder under the action of the guide gear ring, after the green blank of the bevel gear is pressed and formed, the upper base plate moves upwards, the upper outer punch moves upwards and rotates in the middle die until the middle die is completely separated, meanwhile, the middle die moves downwards and rotates reversely, a product is ejected out, and demoulding is finished. When the helical gear with complex modeling is produced, the lower die assembly is kept still, and the product is ejected out by using the rotation of the middle die, so that the production requirements of the helical gear with complex modeling such as that the inner hole is special-shaped or that a boss (or a small hole) is arranged on the end surface of the helical gear around the inner hole can be met.

Claims

1. A closed maintenance-free powder metallurgy helical gear rotating device is characterized in that: the upper die assembly comprises an upper base plate I, an upper inner punch is arranged on the bottom surface of the upper base plate I, an upper outer punch is sleeved on the outer side of the upper inner punch, a hanging table is arranged at the top of the upper outer punch, an upper cover plate fixedly connected with the upper base plate I is sleeved on the outer side of the hanging table, a guide mechanism is arranged on the outer side of the upper cover plate, the upper inner punch and the upper outer punch enter the middle die under the action of the guide mechanism, a lower die assembly is arranged below the middle die, the lower die assembly comprises a lower die holder, a lower base plate is fixedly connected to the top surface of the lower die holder, a lower punch meshed with the middle die is arranged on the top surface of the lower base plate, and the lower punch is fixedly connected with the lower base plate through the lower cover plate.

2. The closed maintenance-free powder metallurgy helical gear rotating device according to claim 1, wherein: the guide mechanism comprises an upper base plate II, the upper base plate II is positioned above the upper base plate I, a plurality of guide posts are arranged on the bottom surface of the upper base plate II, the guide posts penetrate through the upper base plate I and are connected with a lifting plate, and the lifting plate is fixedly connected with a guide gear ring meshed with the upper outer punch.

3. The closed maintenance-free powder metallurgy helical gear rotating device according to claim 2, wherein: the lifting plate is provided with an adjusting rod, and the lower die holder is provided with a limiting rod for blocking the adjusting rod.

4. The closed maintenance-free powder metallurgy helical gear rotating device according to claim 1, wherein: a plurality of friction plates are arranged between the top surface of the hanging table and the first upper base plate, and a needle bearing is arranged between the bottom surface of the hanging table and the upper cover plate.