CN214023295U

CN214023295U - Cold heading forming die for manufacturing brake rocker arm shaft

Info

Publication number: CN214023295U
Application number: CN202022756530.2U
Authority: CN
Inventors: 陈含雷
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-08-24
Anticipated expiration: 2030-11-25

Abstract

The utility model relates to a rocking arm axle production technical field specifically relates to a cold-heading forming die of brake rocking arm axle preparation effect, including die body and the die cavity of setting on the die body, the die cavity including elliptical trough, round hole groove and the flower tooth groove that sets gradually, elliptical trough, round hole groove and flower tooth groove communicate in proper order and run through the cell body and form logical groove, elliptical trough, round hole groove and flower tooth groove be coaxial setting, the cell wall of flower tooth groove on the equipartition have tooth, the internal diameter of flower tooth groove the same with the internal diameter of round hole groove, the broadside of elliptical trough the same with the internal diameter of round hole groove, the long limit of elliptical trough be greater than the internal diameter of round hole groove, adopt the combination of mould and cold-heading technology, with the one time cold-heading shaping of rocking arm axle semi-finished product, very big reduction manufacturing cost, improved production efficiency.

Description

Cold heading forming die for manufacturing brake rocker arm shaft

Technical Field

The utility model relates to a rocking arm axle production technical field specifically is a cold-heading forming die who has related to brake rocking arm axle preparation.

Background

The bicycle and the electric vehicle are one of important transportation tools for short trip in daily life of people, especially in the present stage, green trip, energy conservation and emission reduction are advocated, the bicycle and the electric vehicle become the optimal choice for short trip, and the brake device is one of the core components of the bicycle and the electric vehicle, so that the safety of people trip is influenced.

The rocker shaft is one of the core components of the brake device, plays a role in transmission and connection, is generally processed by a machine tool during production, but the machine tool is too high in cost to cause large front end investment, and when the machine tool performs cutting, grinding and other processes, used cutters are easily damaged parts which are high in price and frequent in replacement to further cause the problem of high processing cost.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned problem, provide a cold-heading forming die that brake rocking arm axle preparation was used, adopt the combination of mould and cold-heading technology, with the one time cold-heading shaping of rocking arm axle semi-manufactured goods, very big reduction manufacturing cost, improved production efficiency.

The technical scheme of the utility model be, a cold-heading forming die for brake rocking arm axle preparation is provided, including die body and the die cavity of setting on the die body, the die cavity including elliptical trough, round hole groove and the flower tooth groove that sets gradually, elliptical trough, round hole groove and flower tooth groove communicate in proper order and run through the cell body and form logical groove, elliptical trough, round hole groove and flower tooth groove be coaxial setting.

Teeth are uniformly distributed on the wall of the spline tooth groove, and the inner diameter of the spline tooth groove is the same as that of the round hole groove.

The wide side of the elliptical groove is the same as the inner diameter of the circular hole groove, and the long side of the elliptical groove is larger than the inner diameter of the circular hole groove.

The inner diameter of the spline tooth groove is 12mm-14mm, and the height of the tooth is 1mm-1.5 mm.

The number of the teeth is 29-35.

The cross section of the elliptical groove is of a runway-shaped structure.

The utility model has the advantages that:

1. the mode of adding cold heading to the die is adopted to replace machine tool machining, so that the production process is simplified and easy to operate, the complex program and parameter setting of the machine tool are avoided, the labor cost and early-stage investment are reduced, and the production efficiency is improved.

2. The mould is of an integrated structure, is firm and durable as a whole, avoids frequent replacement, and has low manufacturing cost and further reduces the use cost.

3. The shape of the elliptical groove and the circular hole groove are matched with the shape of the rocker shaft to be produced, the semi-finished rocker shaft is placed into a die, and the semi-finished rocker shaft can be processed into a finished product through one-time cold heading, so that the processing speed is high, and the production efficiency is greatly improved.

Drawings

Fig. 1 is a schematic front sectional view of the present invention;

fig. 2 is a schematic top view of the present invention;

fig. 3 is a schematic side view of the cross-sectional structure of the present invention:

fig. 4 is a schematic structural view of a semi-finished rocker arm shaft.

In the attached drawing, 1, a die body, 2, an elliptical groove, 3, a circular hole groove, 4, a flower tooth groove, 5 and teeth.

Detailed Description

As shown in fig. 1-4, the utility model provides a cold-heading forming die for brake rocker shaft preparation, including die body 1 and the die cavity of setting on die body 1, the die cavity including elliptical trough 2, round hole groove 3 and the flower tooth groove 4 that set gradually, elliptical trough 2, round hole groove 3 and flower tooth groove 4 communicate in proper order and run through the cell body and form logical groove, elliptical trough 2, round hole groove 3 and flower tooth groove 4 be coaxial setting.

The semi-finished rocker shaft is processed into a finished product by adopting a cold heading process through the die in one step, the processing mode is simple and easy to operate, the die is simple in structure and low in cost, the requirement on workers is low, the labor cost is reduced, during processing, the semi-finished rocker shaft is placed into the elliptical groove 2 and the circular hole groove 3, due to the fact that the teeth 5 in the toothed groove 4 block, the upper end of the semi-finished rocker shaft is partially exposed, the semi-finished rocker shaft is directly pressed in one step by adopting the cold heading mode, at the moment, the lower end of the semi-finished rocker shaft forms the toothed teeth on the outer circumference under the action of the teeth 5, and the processing of the toothed teeth is completed.

As shown in fig. 1-3, teeth 5 are uniformly distributed on the wall of the spline tooth groove 4, and the inner diameter of the spline tooth groove 4 is the same as that of the circular hole groove 3.

The spline groove 4 is used for processing the tooth of the semi-finished product of the rocker arm shaft through the tooth 5 arranged in the spline groove, the semi-finished product of the rocker arm shaft is directly pressed in a cold heading mode, and the one-step forming is simple in process, easy to operate and high in processing speed.

As shown in fig. 1 to 3, the wide side of the elliptical groove 2 is the same as the inner diameter of the circular hole groove 3, and the long side of the elliptical groove 2 is larger than the inner diameter of the circular hole groove 3.

The size of the inner diameter of the round hole groove 3 of the die is set, so that the machined rocker arm shaft is better in integrity and higher in strength, and the problem that layers are easy to break between the upper part and the lower part of the rocker arm shaft is solved.

As shown in figures 1-3, the inner diameter of the flower tooth groove 4 is 12mm-14mm, and the height of the tooth 5 is 1mm-1.5 mm.

By controlling the size of the die, the machined rocker arm shaft is suitable for most bicycles or electric vehicles in the market, and the produced rocker arm shaft has high strength and strong practicability on the premise of low-cost production.

The number of the teeth 5 is 29-35.

By controlling the number of the teeth 5, the machined rocker arm shaft is more suitable for most products on the market on the premise of not influencing the strength of the rocker arm shaft.

The section of the elliptical groove 2 is of a runway-shaped structure.

The oval groove 2 of runway column structure when the cold-heading, makes the stock reduce its deflection when the cold-heading, can cold-heading shaping once, makes the back of processing more adapt to other brake parts on the market.

Claims

1. The utility model provides a cold-heading forming die of brake rocking arm axle preparation usefulness, includes die body (1) and sets up the die cavity on die body (1), its characterized in that: the die cavity including oval groove (2), round hole groove (3) and the flower tooth's socket (4) that set gradually, oval groove (2), round hole groove (3) and flower tooth's socket (4) communicate in proper order and run through the cell body and form logical groove, oval groove (2), round hole groove (3) and flower tooth's socket (4) be coaxial setting.

2. The cold heading forming die for manufacturing the brake rocker shaft as claimed in claim 1, wherein the cold heading forming die comprises: teeth (5) are uniformly distributed on the wall of the spline tooth groove (4), and the inner diameter of the spline tooth groove (4) is the same as that of the circular hole groove (3).

3. The cold heading forming die for manufacturing the brake rocker shaft as claimed in claim 1, wherein the cold heading forming die comprises: the wide side of the oval groove (2) is the same as the inner diameter of the round hole groove (3), and the long side of the oval groove (2) is larger than the inner diameter of the round hole groove (3).

4. The cold heading forming die for manufacturing the brake rocker shaft as claimed in claim 2, wherein the cold heading forming die comprises: the inner diameter of the spline groove (4) is 12mm-14mm, and the height of the teeth (5) is 1mm-1.5 mm.

5. The cold heading forming die for manufacturing the brake rocker shaft as claimed in claim 2, wherein the cold heading forming die comprises: the number of the teeth (5) is 29-35.

6. The cold heading forming die for manufacturing the brake rocker shaft as claimed in claim 1, wherein the cold heading forming die comprises: the cross section of the elliptical groove (2) is of a runway-shaped structure.