Novel structure of end face tooth flange yoke forge piece

Abstract

The utility model discloses a novel end face tooth flange yoke forge piece structure which comprises a horizontally-arranged disc portion and yoke lugs arranged on the left side and the right side of the disc portion, an arch-shaped connecting rib is arranged between the lower portions of the two yoke lugs, the whole outer side face of each yoke lug is of a circular structure, and the surface of each circular structure is a conical surface gradually protruding from the outer circle to the circle center. The edge of the circular structure is of a cambered surface transition structure. The front end and the rear end of the top face of the disc part are each of an upwards-concave step structure. And a parting line between the upper die and the lower die horizontally penetrates through the circle center of the circular structure during forging operation. In the forging process, metal flowing is facilitated, material shortage of the outer side face of the fork lug is avoided, meanwhile, the strength of the fork lug is improved, demolding can be smoothly and rapidly conducted, and the bottom face area of the disc part is increased, namely the area of the tooth face structure is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of the automotive industry, and particularly relates to a new structure of an end-face tooth flange fork forging. Background Art

[0002] The end-face tooth flange fork is a fitting for a transmission shaft, which is widely used in various vehicles and machinery to ensure the effective connection and stable operation of the transmission shaft. The design of this fitting aims to improve the transmission efficiency, reduce energy loss, and ensure safety and reliability at the same time. The end-face tooth flange fork is usually made of high-strength materials to withstand the stress under high-speed rotation and heavy-load conditions.

[0003] As Figure 1 and Figure 2 shown, the end-face tooth flange fork forging includes a horizontally arranged disc portion 1 and fork ears 2 provided on the left and right sides of the disc portion 1. A bow-shaped connecting rib 3 is provided between the lower portions of the two fork ears 2. The existing end-face tooth flange fork forging has the following problems:

[0004] 1) The two fork ears 2 are basically above the parting line 8, that is, both fork ears 2 are in the upper die during forging, which results in a large draft length and a large demolding resistance, affecting smooth and rapid demolding.

[0005] 2) The upper end portion of the fork ear 2 is relatively thin, affecting the strength of the fork ear 2 during use.

[0006] 3) The outer side surface of the fork ear 2 is an inverted U-shaped inclined plane 9 (the left and right sides of the upper die cavity are also inverted U-shaped inclined planes), which is not conducive to metal flow during forging and easily causes material shortage on the outer side surface of the fork ear 2.

[0007] 4) The front end and the rear end of the bottom surface of the disc portion 1 are both concave step structures 4, which correspondingly reduces the bottom surface area of the disc portion 1 and naturally reduces the area of the tooth surface structure. Summary of the Utility Model

[0008] In order to solve the above technical problems existing in the prior art, the utility model provides a new structure of an end-face tooth flange fork forging that is easy to demold, has high fork ear strength, no material shortage on the outer side surface of the fork ear, and a large disc portion area.

[0009] To solve the above technical problems, the utility model adopts the following technical scheme: A new structure of an end-face tooth flange fork forging includes a horizontally arranged disc portion and fork ears provided on the left and right sides of the disc portion. A bow-shaped connecting rib is provided between the lower portions of the two fork ears. The outer side surface of the fork ear is an overall circular structure, the surface of the circular structure is a conical surface that gradually protrudes from the outer circle to the center of the circle, and the edge of the circular structure is an arc surface transition structure.

[0010] The front end and the rear end of the top surface of the disc portion are both concave step structures.

[0011] During the forging operation, the parting line between the upper die and the lower die passes horizontally through the center of the circular structure.

[0012] By adopting the above technical solution, compared with the existing technology, the utility model has the following advantages:

[0013] 1) The outer side of the fork ear is generally circular, which is conducive to metal flow during the forging process and avoids material shortage on the outer side of the fork ear.

[0014] 2) The surface of the circular structure is a conical surface that gradually bulges from the outer circle to the center of the circle, which increases the thickness of the upper and middle parts of the fork ears and improves the strength of the fork ears.

[0015] 3) The parting line passes horizontally through the center of the circular structure. During forging, the upper part of the fork ear is located in the die cavity of the upper die, and the lower part of the fork ear is located in the die cavity of the lower die. This reduces the contact area between the fork ear and the die cavity of the upper die, that is, shortens the draft length, reduces the demoulding resistance, and allows for smooth and quick demoulding.

[0016] 4) The front and rear ends of the bottom surface of the disc no longer have a concave step structure. Instead, an upward concave step structure is provided at the front and rear ends of the top surface of the disc. This can increase the bottom surface area of the disc without increasing the weight of the disc, that is, increase the area of the tooth surface structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the planar structure of an existing end face tooth flange forged piece;

[0018] Figure 2 yes Figure 1 Left view of;

[0019] Figure 3 It is a schematic diagram of the plane structure of the utility model;

[0020] Figure 4 yes Figure 3 Left view of . DETAILED DESCRIPTION

[0021] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples.

[0022] Figure 3 and Figure 4 As shown, the new structure of the end face tooth flange forged piece of the utility model includes a horizontally arranged disk portion 1 and fork ears 2 arranged on the left and right sides of the disk portion 1, an arched connecting rib 3 is provided between the lower parts of the two fork ears 2, and the outer side surface of the fork ears 2 is a circular structure 5 as a whole. The surface of the circular structure 5 is a conical surface that gradually convexes from the outer circle to the center of the circle, and the edge of the circular structure 5 is a curved transition structure 6.

[0023] The front and rear ends of the top surface of the disk portion 1 are both formed with upward concave step structures 7 .

[0024] During the forging operation, the parting line 8 between the upper die and the lower die passes horizontally through the center of the circular structure 5 .

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] 1) The outer side surface of the fork ear 2 is generally a circular structure 5, which facilitates metal flow during the forging process and avoids material shortage on the outer side surface of the fork ear 2.

[0027] 2) The surface of the circular structure 5 is a conical surface that gradually bulges from the outer circle to the center, thereby increasing the thickness of the upper middle portion of the fork ear 2 and improving the strength of the fork ear 2.

[0028] 3) The parting line 8 passes horizontally through the center of the circular structure 5. During the forging operation, the upper part of the fork ear 2 is located in the die cavity of the upper die, and the lower part of the fork ear 2 is located in the die cavity of the lower die. This reduces the contact area between the fork ear 2 and the die cavity of the upper die, that is, shortens the draft length, reduces the demolding resistance, and enables smooth and rapid demolding.

[0029] 4) The front and rear ends of the bottom surface of the disc portion 1 no longer have a concave step structure. Instead, an upward concave step structure 7 is provided at the front and rear ends of the top surface of the disc portion 1. This increases the bottom surface area of the disc portion 1, that is, the area of the tooth surface structure, without increasing the weight of the disc portion 1.

[0030] The above embodiments illustrate the basic principles and features of the present invention. However, the above merely illustrates preferred embodiments of the present invention and is not intended to limit the present invention to the embodiments described. Persons skilled in the art, inspired by this patent, may make various modifications and improvements without departing from the spirit of the present invention and the scope of protection of the claims, all of which fall within the scope of protection of the present invention. Therefore, the patent and scope of protection of this utility model shall be subject to the appended claims.

Claims

1. A new structure of end face tooth flange forged parts, comprising a horizontally arranged disc and fork ears arranged on the left and right sides of the disc, with an arched connecting rib provided between the lower parts of the two fork ears, characterized by: The overall outer side of the fork ear is a circular structure. The surface of the circular structure is a conical surface that gradually protrudes from the outer circle towards the center of the circle. The edge of the circular structure is an arc transition structure. Both the front end and the rear end of the top surface of the disc part are concave upper step structures.

2. The new structure of the end face tooth flange forged piece according to claim 1 is characterized in that: During the forging operation, the parting line between the upper die and the lower die horizontally passes through the center of the circle of the circular structure.

Images