Small-size automobile power generation rectifier with press-mounted diodes

Abstract

The utility model discloses a diode press-fitting type small-size automobile power generation rectifier, which comprises a negative diode, a negative plate, a positive diode and a positive plate, wherein the negative diode is in interference fit with the negative plate; the positive diode is in interference fit with the positive plate; and an insulating bush is arranged between the negative plate and the positive plate. According to the utility model, the small-pipe-diameter press-fitting diode is developed and is matched with the polar plate through mechanical interference press fitting, so that the miniaturization structure requirement is met; compared with soldering tin material sintering connection, the possibility of poor aging such as tin cracks is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive rectifiers, and particularly relates to a small-sized automotive power generation rectifier with diodes press-fitted thereon. Background Art

[0002] With the requirements of miniaturization manufacturing and lightweight of generators, the structure of rectifiers tends to develop towards miniaturization. Currently, the key component, the power diode, is sintered and soldered to the plate through tin soldering. The Chinese utility model patent with the application number CN213242281U discloses a vehicle rectifier, in which the diode is sintered to the plate through solder.

[0003] When the rectifier works, due to the influence of the heat source of the whole vehicle, the temperature will be high. Commonly used solders are mostly tin-lead alloy solders, and their melting points are relatively low, generally between 183°C and 227°C. After working for a long time, when the temperature of the generator is higher than the melting point, the tin solder will start to melt. Moreover, due to the temperature difference between the working and non-working states of the generator and the combined hot and cold changes in the vehicle use environment, the tin soldering has problems of aging and weakened strength, resulting in the virtual soldering or detachment of the power diode, thus causing the generator to fail to work. And due to the structural limitations of the sintered diode, most of its exposed surfaces are soft silicone, with low resistance to deformation, and are prone to deformation and collision. When the vehicle is in use, mud and other particulate matters are likely to cause the diode to deform or break, resulting in the failure of the generator function.

[0004] The production of tin solder sintering is restricted by the material surface, production equipment and processes. The production cycle is long, and a soldering tunnel furnace is required. The equipment investment is high, the processes are complex and the production efficiency is low, resulting in high production costs. The solder has certain requirements for the material storage environment. Due to surface oxidation or dirt, it is easy to have problems such as virtual soldering, with high material costs and high failure rates.

[0005] Therefore, a small-sized automotive power generation rectifier with diodes press-fitted thereon is proposed. Summary of the Invention

[0006] The purpose of the utility model is to provide a small-sized automotive power generation rectifier with diodes press-fitted thereon to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] A small-sized automotive power generation rectifier with diodes press-fitted thereon, including a negative diode, a negative plate, a positive diode, and a positive plate. The negative diode is in interference fit with the negative plate;

[0009] The positive diode is in interference fit with the positive plate;

[0010] An insulating bushing is installed between the negative plate and the positive plate.

[0011] Further, a B+ screw is installed on the positive plate.

[0012] Further, the B+ output screw is press-fitted onto the positive plate by a rivet.

[0013] Further, the rivet fixes the bridge bracket, the positive plate, the negative plate and the bushing.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. By developing a press-fit diode with a small tube diameter and mating it with the plate through mechanical interference press-fitting, the structural requirements for miniaturization are met; compared with the sintered connection of soldering materials, the possibility of defects such as tin cracking and aging is reduced.

[0016] 2. During the production process of the rectifier product, by using a press-fitting device, connection can be achieved with only one press-fitting process, reducing processes such as placing solder, multi-stage sintering, and cooling, reducing the investment in production equipment, and improving production efficiency.

[0017] 3. There is no requirement for the cleanliness of the welding surface, reducing defects caused by material problems, and reducing the material used for the plate and the material requirements, thus reducing the material cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is an exploded structural diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Embodiment

[0021] Please refer to Figure 1-2 , the present utility model provides a technical solution:

[0022] A small-sized rectifier with a press-fit diode includes a negative diode 1, a negative plate 2, a positive diode 3, a positive plate 4, an insulating bushing 5, a B+ screw 6, a rivet 7, and a bridge bracket 8.

[0023] The positive diode 3 and the negative diode 1 are press-fitted onto the positive plate 4 and the negative plate 2 through interference fitting. An insulating bushing 5 is installed between the positive plate 4 and the negative plate 2. At the same time, a B+ screw 6 is installed on the positive plate. Then, the positive plate 4, the negative plate 2, the bridge bracket 8, and the insulating bushing 5 are assembled and fixed by a rivet 7.

[0024] Working principle:

[0025] For a single tube with a small diameter, the lead wire is inserted into the press-fitting hole of the plate. Through the press-fitting equipment and fixtures, an interference fit between the diode and the corresponding plate is achieved. While realizing the electrical connection function, it can ensure that the diode will not rotate or fall off. Its pull-off force can reach 8000 - 10000 N, ensuring the normal operation of the generator, extending its service life, reducing related processes such as welding, and lowering production costs.

[0026] The minimum diameter of the diode can be as small as 9 mm. By designing and developing small-sized chips and tube sockets, the requirements of plate structures with different sizes can be met, so that the diameter of the rectifier can be made 75 mm, realizing the miniaturization requirement of the generator.

[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small-sized automobile power generation rectifier of a diode press-fit type, comprising a negative diode (1), a negative electrode plate (2), a positive diode (3), and a positive electrode plate (4), characterized in that: The negative diode (1) and the negative electrode plate (2) are interference fit; The positive diode (3) and the positive electrode plate (4) are interference fit; An insulating bushing (5) is installed between the negative electrode plate (2) and the positive electrode plate (4).

2. A small-size automobile power generation rectifier of diode press-pack type according to claim 1, characterized in that: The positive electrode plate (4) is mounted with a B+ screw (6).

3. A small-size automobile power generation rectifier of diode press-pack type according to claim 2, characterized in that: The B+ output screw (6) is press-fitted onto the positive electrode plate (4) via rivets (7).

4. A small-size automobile power generation rectifier of diode press-pack type according to claim 3, characterized in that: The rivets (7) fix the bridge bracket (8), the positive electrode plate (4), the negative electrode plate (2) and the bushing (10).

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