A mounting and positioning fixture for power devices
By designing installation and positioning fixtures for power devices, and using structures such as fixed guide rods and limiting slots to achieve precise positioning and fixing of devices, the problems of inaccurate device alignment and poor welding in traditional installation methods are solved, and installation efficiency and quality are improved.
Patent Information
- Application Number
- CN202411983805.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-04-04
AI Technical Summary
In the process of installing power devices on a printed circuit board (PCB), traditional installation methods can easily lead to inaccurate alignment of the device pins, and can easily cause displacement due to external forces or solder flow during the soldering process, resulting in poor soldering and electrical connection failure.
An installation positioning fixture for power devices is designed, including mounting and fixing the lower bottom plate and movable upper top plate. The precise positioning and fixing of the device is achieved through structures such as fixing guide rods, limiting grooves, guide slopes, positioning bosses, support springs and limiting springs.
This fixture can significantly improve the installation accuracy of power devices, reduce the difficulty and error rate of manual operation, and is suitable for mass production and maintenance scenarios, effectively saving time and cost and improving overall work efficiency.
Smart Images
Figure CN119767569A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of installation and positioning of power devices, and in particular to an installation and positioning fixture for power devices. Background Art
[0002] With the rapid development of power electronics technology, the size of power converters is getting smaller and smaller, the power density is getting higher and higher, and the internal power units are also developing in a modular way. The functions of electronic equipment are becoming more and more complex, and the performance and installation accuracy requirements of power devices are getting higher and higher. In the process of installing power devices on PCBs, traditional installation methods often rely on manual alignment, which is prone to inaccurate alignment between the power device pins and the pads, and the pins and the corresponding pads and vias on the PCB. In addition, during welding operations, power devices are easily displaced due to external forces or solder flow, which leads to many problems such as poor welding and electrical connection failures, seriously affecting the overall quality and performance of the equipment. In view of this, it is particularly important to develop a power device installation and positioning fixture that can effectively solve the above problems. Summary of the invention
[0003] The main purpose of the present invention is to provide a positioning fixture that is accurate in positioning, easy to operate and can realize the simultaneous installation of multiple devices in response to the positioning requirements of power devices when they are installed on a printed circuit board (PCB), so as to ensure that the power devices can be accurately and efficiently soldered on the PCB, thereby improving the quality and efficiency of the electronic equipment production and maintenance process, and ensuring the subsequent reliable operation of the entire electronic equipment.
[0004] To achieve the above object, the present invention provides a mounting and positioning fixture for power devices, comprising:
[0005] Install and fix the lower base plate: the installing and fixing lower base plate is provided with an installation groove for installing power devices and PCB boards, a fixed guide rod is provided in the installation groove, a limiting groove is provided above the fixed guide rod, and a guide slope is provided on the top of the fixed guide rod;
[0006] Movable upper top plate: A positioning boss and a support spring with a hollow structure are provided at the bottom of the movable upper top plate, and the support spring is sleeved outside the positioning boss. One end of the support spring abuts against the bottom of the movable upper top plate, and the other end abuts against the top surface of the PCB board. A limit spring and a fixing claw are provided on the top surface of the movable upper top plate, and the limit spring is nested inside the fixing claw. A buffer gasket is provided between the PCB board and the power device. When in use, after the fixed guide rod passes through the power device, the PCB board and the movable upper top plate in sequence, one end of the limit spring is stuck in the limit groove.
[0007] A further technical solution of the present invention is that the minimum compression length of the support spring is smaller than the thickness of the positioning boss minus the thickness of the PCB board.
[0008] A further technical solution of the present invention is that the fixing claw is in an inverted L shape.
[0009] A further technical solution of the present invention is that the fixed guide rod is circular, and a platform is arranged on the top of the fixed guide rod.
[0010] A further technical solution of the present invention is that handles are provided at both ends of the limit spring.
[0011] A further technical solution of the present invention is that a mounting hole matching the fixed guide rod is provided on the power device.
[0012] A further technical solution of the present invention is that a positioning column is provided at one end of the buffer gasket, and a positioning hole corresponding to the positioning column is opened on the PCB board.
[0013] The installation and positioning jig for power devices of the present invention allows multiple power devices to be placed simultaneously for installation and welding in terms of structural design according to the layout of the PCB board and actual production or maintenance needs. This feature greatly improves work efficiency and is particularly suitable for batch production scenarios or maintenance situations where multiple power devices need to be replaced simultaneously. It can effectively save time costs and improve overall work efficiency. It is also simple to install and accurately positioned, and multiple devices can be positioned and installed simultaneously, making it suitable for maintenance and production use. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0015] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of a mounting and positioning fixture for power devices of the present invention;
[0016] Figure 2 It is a schematic diagram of the exploded structure of a preferred embodiment of the installation and positioning fixture for power devices of the present invention.
[0017] Description of Figure Numbers:
[0018] Install and fix the lower bottom plate 1; the movable upper top plate 2; the power device 3; the PCB board 4; the installation slot 5; the fixed guide rod 6; the limit slot 7; the guide slope 8; the positioning boss 9; the support spring 10; the limit spring 11; the fixing claw 12; the buffer gasket 13; and the positioning column 14.
[0019] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0021] Please refer to Figure 1 and Figure 2 The present invention provides an installation and positioning fixture for power devices. A preferred embodiment of the installation and positioning fixture for power devices of the present invention includes a fixed lower base plate 1 and a movable upper top plate 2.
[0022] The lower base plate 1 is provided with an installation groove 5 for installing the power device 3 and the PCB board 4, the installation groove 5 is provided with a fixed guide rod 6, the upper part of the fixed guide rod 6 is provided with a limiting groove 7, and the top of the fixed guide rod 6 is provided with a guide slope 8.
[0023] A positioning boss 9 and a support spring 10 with a hollow structure are provided at the bottom of the movable upper top plate 2. The support spring 10 is sleeved outside the positioning boss 9. One end of the support spring 10 abuts against the bottom of the movable upper top plate 2, and the other end abuts against the top surface of the PCB board 4. A limiting spring 11 and a fixing claw 12 are provided on the top surface of the movable upper top plate 2. The limiting spring 11 is nested inside the fixing claw 12.
[0024] The guide slope 8 greatly facilitates the insertion operation of the mounting hole of the power device 3 and reduces the difficulty of installation. During the sliding process of the movable upper top plate 2 toward the fixed guide rod 6, the limit spring 11 will be automatically bounced off by the guide slope 8 of the circular fixed guide rod 6 until the limit spring 11 slides into the limit groove 7 and completes the limit locking, making the installation process of the entire power device 3 simple and efficient, effectively reducing the workload of the operator and shortening the operation time.
[0025] A buffer pad 13 is provided between the PCB board 4 and the power device 3. The buffer pad 13 can buffer the stress between the PCB board 4 and the power device 3, and can adjust the distance from the PCB board 4 to the power device 3 through different thicknesses.
[0026] When in use, after the fixed guide rod 6 passes through the power device 3 , the PCB board 4 and the movable upper top plate 2 in sequence, one end of the limit spring 11 is inserted into the limit groove 7 .
[0027] By using the installation and positioning fixture for power devices of this embodiment, the power device 3 after the pins are formed can be installed on the installation groove 5 of the installation and fixed lower base plate 1, and pass through the buffer, the pad of the PCB board 4, the installation hole and the movable upper top plate 2 together with the installation and fixed lower base plate 1 to achieve the fixation and positioning of the power device 3, which can effectively solve the problems of inaccurate positioning of manually placed devices, unreasonable pin reserved length, and unsuitability for batch operation and maintenance in the background technology. The installation and positioning fixture for power devices is simple to install, accurate in positioning, and can realize the simultaneous positioning and installation of multiple devices, which is suitable for maintenance and production use.
[0028] Furthermore, in this embodiment, the support spring 10 can be of a structure with one end larger than the other end, and the end with the smaller size can be fitted to the root of the positioning boss 9 without being loose. The minimum compression length of the support spring 10 is less than the thickness of the positioning boss 9 minus the thickness of the PCB board 4, so that the PCB board 4 and the power device 3 can be pressed tightly.
[0029] Furthermore, in this embodiment, the fixing claw 12 is in an inverted L shape. The inverted L-shaped fixing claw 12 can not only limit the maximum stroke and minimum stroke of the limit spring 11, prevent the limit spring 11 from excessive deformation and metal fatigue, but also has an anti-falling effect, and the limit spring 11 will not fall off when it moves within the maximum stroke and minimum stroke.
[0030] Furthermore, in the present embodiment, the fixed guide rod 6 is circular, and a platform is provided on the top of the fixed guide rod 6, thereby preventing the top from being too sharp and causing stabbing accidents.
[0031] Furthermore, in this embodiment, handles are provided at both ends of the limit spring 11 to facilitate unlocking the limit when the limit spring 11 is locked.
[0032] Furthermore, in this embodiment, a mounting hole adapted to the fixed guide rod 6 is provided on the power device 3. The mounting hole is matched with the fixed guide rod 6.
[0033] Furthermore, in this embodiment, a positioning post 14 is provided at one end of the buffer gasket 13 , and a positioning hole corresponding to the positioning post 14 is opened on the PCB board 4 . The positioning post 14 cooperates with the positioning hole to position the buffer gasket 13 .
[0034] The PCB board 4 is also provided with a through hole matched with the positioning boss 9 , and the outer diameter of the positioning boss 9 matches the size of the through hole.
[0035] The following describes the assembly process and working principle of the mounting and positioning fixture for power devices of the present invention.
[0036] During assembly, the mounting hole of the power device 3 is first passed through the fixing guide rod 6 until the back surface of the power device 3 is in contact with the wall surface of the mounting groove 5 .
[0037] Then place the buffer gasket 13 under the PCB board 4 so that the two positioning columns 14 of the buffer gasket 13 are accurately inserted into the corresponding positioning holes of the PCB board 4 to complete the positioning and installation of the buffer gasket 13. Then, the formed power device 3 and the installed and fixed lower base plate 1 are passed through the corresponding pads and vias of the PCB board 4 until the front of the power device 3 and the buffer gasket 13 are completely fitted.
[0038] After the power device 3 is placed, the positioning boss 9 of the movable upper top plate 2 is passed through the fixed guide rod 6 and aligned with the through hole of the PCB board 4, and then slid downward along the fixed guide rod 6 to make it close to the power device 3 and the PCB board 4. During the sliding process of the movable upper top plate 2 toward the fixed guide rod 6, the limit spring 11 will be automatically bounced off by the guide slope 8 of the fixed guide rod 6. As the movable upper top plate 2 continues to slide down, when the limit spring 11 slides to the position of the limit groove 7 on the circular fixed guide rod 6, one end of the limit spring 11 will be embedded in the limit groove 7 to complete the limit locking. At the same time, the support spring 10 begins to be stressed during the downward pressing process. The spring force generated during the downward pressing process presses the PCB board 4, the buffer gasket 13, the power device 3 and the installation fixed lower bottom plate 1. The entire installation and positioning fixture completes the positioning and installation of the power device 3 on the PCB board 4.
[0039] Then, the welding operation of the power device 3 is carried out. When the jig needs to be disassembled after the welding is completed, the operator first holds the handle at the root of the limit spring 11, pulls or rotates the handle inward (the specific operation method depends on the actual design) to disengage the limit spring 11 from the limit groove 7 and release the limit lock. Then slowly lift the movable upper top plate 2, slide it upward along the circular fixed guide rod 6 until it exits the guide rod, and finally remove the installed fixed lower bottom plate 1 to complete the disassembly of the jig.
[0040] The structural design of the installation and positioning fixture for power devices of the present invention allows multiple power devices 3 to be placed simultaneously for installation and welding according to the layout of the PCB board 4 and actual production or maintenance needs. This feature greatly improves work efficiency and is particularly suitable for mass production scenarios or maintenance situations that require the simultaneous replacement of multiple power devices 3. It can effectively save time costs and improve overall work efficiency.
[0041] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A mounting and positioning fixture for power devices, characterized in that: include: Install and fix the lower base plate: the installing and fixing lower base plate is provided with an installation groove for installing power devices and PCB boards, a fixed guide rod is provided in the installation groove, a limit groove is provided above the fixed guide rod, and a guide slope is provided on the top of the fixed guide rod; Movable upper top plate: A positioning boss and a support spring with a hollow structure are provided at the bottom of the movable upper top plate, and the support spring is sleeved outside the positioning boss. One end of the support spring abuts against the bottom of the movable upper top plate, and the other end abuts against the top surface of the PCB board. A limit spring and a fixing claw are provided on the top surface of the movable upper top plate, and the limit spring is nested inside the fixing claw. A buffer gasket is provided between the PCB board and the power device. When in use, after the fixed guide rod passes through the power device, the PCB board and the movable upper top plate in sequence, one end of the limit spring is stuck in the limit groove.
2. The installation and positioning fixture for power devices according to claim 1, characterized in that: The minimum compression length of the support spring is smaller than the thickness of the positioning boss minus the thickness of the PCB board.
3. The installation and positioning fixture for power devices according to claim 1, characterized in that: The fixing claw is in an inverted L shape.
4. The installation and positioning fixture for power devices according to claim 1, characterized in that: The fixed guide rod is circular, and a platform is arranged on the top of the fixed guide rod.
5. The installation and positioning fixture for power devices according to claim 1, characterized in that: Handles are arranged at both ends of the limit spring.
6. The installation and positioning fixture for power devices according to claim 1, characterized in that: The power device is provided with a mounting hole matched with the fixed guide rod.
7. The installation and positioning fixture for power devices according to claim 1, characterized in that: A positioning column is arranged at one end of the buffer gasket, and a positioning hole corresponding to the positioning column is opened on the PCB board.