CN216291901U

CN216291901U - PCB mounting structure of portable EGR valve

Info

Publication number: CN216291901U
Application number: CN202123042144.8U
Authority: CN
Inventors: 谈宏亮
Original assignee: Wuxi Longsheng Technology Co Ltd
Current assignee: Wuxi Longsheng Technology Co Ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-04-12
Anticipated expiration: 2031-12-07

Abstract

The utility model discloses a PCB mounting structure of a portable EGR valve, which comprises a shell, wherein a groove is formed in the upper end surface of the shell, and a convex block is fixedly arranged at the upper part of the left side of the groove; an embedded contact pin is fixedly arranged on the right side of the convex block, and when the embedded contact pin is in a relaxed state, the lowest point of the radian is lower than the bottom end surface of the convex block; a buckle is fixedly arranged on the right side of the bottom end face of the groove, and a clamping mouth of the buckle faces towards the left side; a PCB is placed in a cavity between the buckle and the bottom end face of the bump, and a bonding pad on the PCB is connected with the embedded contact pin; silica gel is filled above the PCB. The utility model greatly shortens the working hours and labor cost, further reduces the production cost of products, increases the production efficiency of the products and improves the quality of the products.

Description

PCB mounting structure of portable EGR valve

Technical Field

The utility model relates to the technical field of automobile equipment, in particular to a PCB mounting structure of a portable EGR valve.

Background

The throttle valve and the EGR valve are respectively arranged at the air inlet end and the exhaust end of the internal combustion engine and are electromechanical integrated products for controlling exhaust emission. As the parts of the throttle valve and the EGR valve are used in a relatively severe environment, the process requirements on the sensor are very strict. Taking the assembly of the traditional throttle valve and EGR sensor as an example, a PCB must be installed in a shell contact pin through a welding hole, then the welding hole and the contact pin are welded manually, the PCB is fixed by using a screw, and finally the PCB is encapsulated by using silica gel and is solidified at high temperature for encapsulation protection; the welding process in the process is particularly important, and the defects of the welding process easily cause poor connection between the PCB and the shell, so that the throttle valve or EGR works abnormally; in addition, stress risks are generated in the welding and screwing processes, and components on the PCB are subjected to stress risks.

Aiming at the problems in the welding process, the conventional method is to use a welding robot to carry out welding operation, ensure the consistency and reliability of welding and cooperate with the cross section dissection of a welding point at regular intervals to determine the welding quality; in addition, aiming at the stress problem, at least once every half year of stress analysis is carried out, and the stress is determined to be in a reasonable range in the welding and screwing process. However, the welding robot needs to be purchased additionally, and the stress analysis tester is expensive, so that the measurement can be performed only by a third party, which is very inconvenient. Therefore, a PCB mounting method with a simple structure is urgently needed.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a PCB mounting structure of a portable EGR valve, so as to solve the problem that poor connection between a PCB and a shell is easily caused by a welding process, and improve the reliability of a product.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows.

A PCB mounting structure of a portable EGR valve comprises a rectangular shell; a rectangular groove is formed in the upper end face of the shell, and a rectangular lug is fixedly arranged at the upper part of the left side of the groove; the right side of the lug is fixedly provided with an embedded contact pin which is horizontally arranged, has a downward bending radian and is used for pressing downwards, and the lowest point of the radian is lower than the bottom end surface of the lug when the embedded contact pin is in a relaxed state; a vertically arranged buckle is fixedly arranged on the right side of the bottom end face of the groove, and a clamping mouth of the buckle faces towards the left side; a PCB is placed in a cavity between the buckle and the bottom end face of the bump, and a bonding pad on the PCB is connected with the embedded contact pin; and silica gel for protecting the PCB and filling the groove is filled above the PCB.

Further optimize technical scheme, embedded contact pin is the rigid spring structure.

Due to the adoption of the technical scheme, the technical progress of the utility model is as follows.

According to the PCB mounting structure of the portable EGR valve, the PCB is directly inserted into the shell and is reliably contacted with the bonding pad on the PCB through the bent embedded contact pin, the other end of the PCB is fixed through the buckle, and through the measures, a welding process and a screwing fixing process of PCB assembly are eliminated, equipment purchase cost and labor cost are avoided, and the skill requirement on operators is reduced; meanwhile, the utility model realizes the full automation of the product assembly process and is beneficial to the subsequent mass production. The utility model greatly shortens the working hours and labor cost, further reduces the production cost of products, increases the production efficiency of the products and improves the quality of the products.

Drawings

FIG. 1 is a schematic structural view of a housing according to the present invention;

FIG. 2 is a schematic structural view of the case of the present invention after being mounted with a PCB;

FIG. 3 is a schematic view of the assembled structure of the present invention;

wherein: 1. casing, 2, recess, 3, buckle, 4, embedded contact pin, 5, PCB, 6, silica gel, 7, lug.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The utility model provides a PCB mounting structure of portable EGR valve, combines shown in figure 1, includes casing 1, recess 2, buckle 3, embedded contact pin 4, PCB 5, silica gel 6, lug 7.

The casing 1 is rectangular, and the recess 2 is seted up to casing 1 up end, and recess 2 is the rectangle. The upper part of the left side of the groove 2 is fixedly provided with a convex block 7, and the convex block 7 is rectangular. The right side of the convex block 7 is fixedly provided with an embedded contact pin 4 which is horizontally arranged, and the embedded contact pin 4 is of a rigid spring structure. The embedded contact pin 4 is provided with a downward bent radian and is used for pressing the PCB 5; when the embedded contact pin 4 is in a relaxed state, the lowest point of the radian is lower than the bottom end surface of the bump 7, and the embedded contact pin 4 is connected with a bonding pad on the PCB 5 under the elastic action to form the electrical connection between the sensor shell 1 and the circuit board.

The fixed buckle 3 that is provided with in right side of 2 bottom end faces of recess, the vertical setting of buckle 3, and the bayonet socket of buckle 3 towards the left side. The PCB 5 is placed in a cavity between the buckle 3 and the bottom end face of the bump 7. The height of the groove 2 for fixing the PCB 5 and the height of the clip 3 for fixing the PCB 5 are related to the thickness of the PCB 5 to ensure that the PCB 5 can be reliably fixed in the housing 1. Silica gel 6 is filled to 5 tops of PCB for protect PCB 5 and be used for filling up recess 2, in order to guarantee that equipment can reliable work under adverse circumstances.

When the PCB is actually used, the PCB 5 is placed in the groove 2 and is laid flat, the bent embedded contact pin 4 is reliably contacted with the bonding pad on the PCB 5, and the other end of the PCB 5A is fixed by the buckle 3. The welding process and the screwing fixing process in the PCB 5 assembling process are eliminated, equipment purchasing cost and labor cost are reduced, and the skill requirement on operators is low. Finally, in order to ensure the reliability of the product, the PCB 5 is directly encapsulated with the silica gel 6, the PCB 5 is further fixed, the PCB 5 is isolated from the external severe environment, the conventional assembly mode of adding an upper cover and sealing is replaced, the parts of the upper cover are reduced again on the basis of optimizing the reliability of the product, and the operation time is reduced.

Claims

1. The utility model provides a PCB mounting structure of portable EGR valve which characterized in that: comprises a rectangular shell (1); a rectangular groove (2) is formed in the upper end face of the shell (1), and a rectangular bump (7) is fixedly arranged on the upper portion of the left side of the groove (2); the right side of the bump (7) is fixedly provided with an embedded contact pin (4) which is horizontally arranged, has a downward bending radian and is used for pressing downwards, and when the embedded contact pin (4) is in a relaxed state, the lowest point of the radian is lower than the bottom end surface of the bump (7); a vertically arranged buckle (3) is fixedly arranged on the right side of the bottom end face of the groove (2), and a clamping mouth of the buckle (3) faces towards the left side; a PCB (5) is placed in a cavity between the buckle (3) and the bottom end face of the bump (7), and a pad on the PCB (5) is connected with the embedded contact pin (4); and silica gel (6) used for protecting the PCB (5) and filling the groove (2) is filled above the PCB (5).

2. The PCB mounting structure of a portable EGR valve according to claim 1, wherein: the embedded contact pin (4) is of a rigid spring structure.