Vibration reduction structure of PCB (Printed Circuit Board) electrical element
By designing a space mesh vibration damping part in the PCB electrical components and filling the gaps with flexible materials, the vibration damping problem of gearbox vibration on the components is solved, achieving higher vibration resistance and cost-effectiveness.
Patent Information
- Application Number
- CN202323602867.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2033-12-28
AI Technical Summary
The prior art cannot effectively solve the problem of vibration damping of PCB electrical components by fuel vehicle transmission vibration, resulting in component failure. The existing methods such as the use of vibration damping pads and glue have problems such as increasing costs and poor results.
Design a vibration-absorbing structure of PCB electrical components, by forming a spatial mesh vibration-absorbing part between electrical components, welding brackets and electrical leads, and filling the gaps with flexible materials such as solder and copper, forming an overall structure to reduce vibration, and Fixed connections are formed by welding components to improve the vibration resistance of the components.
It effectively reduces the vibration displacement and stress of electrical components, increases the resonance frequency, reduces the risk of failure, and reduces the production cost and process complexity, avoiding the use of additional parts and equipment.
Smart Images
Figure CN222216057U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of automobiles, in particular to a PCB electrical component vibration reduction structure. Background Art
[0002] For fuel vehicles, the vehicle's gearbox is usually directly rigidly connected to the engine, and the vibration of the engine piston will be directly transmitted to the gearbox; in addition, the meshing of the gears inside the gearbox, the gears between the gears during the shifting process, the shift fork and the solenoid valve motor will all generate relatively high vibration excitation;
[0003] Transmission controller products are usually installed directly on the vehicle's transmission housing; as mentioned above, the transmission vibration excitation will be transmitted to the electronic devices on the PCB through the transmission controller's mounting feet; generally speaking, electronic devices are market standard parts, and the vibration resistance level of some capacitor and inductor products is much lower than the input of the transmission to the controller; under this condition, if there is no vibration reduction or other design to improve the vibration resistance performance of the device, that is, Figure 1 The gap at position A between the electrical component and the solder bracket shown in the figure will cause the electrical component to shift left and right, and the device on the PCB will usually fail in the gearbox installation environment.
[0004] To solve the above problems, the prior art generally uses two types of solutions:
[0005] The first type is to design the vibration damping pad so that the excitation transmitted to the electronic device is less than the allowable excitation of the device;
[0006] The second type is to use glue to reinforce the device, including applying glue on the top of the device to achieve the effect of adding a fixing point, or directly applying glue to the device pins to achieve the reinforcement of the pins;
[0007] Both of the above methods have some drawbacks and cannot completely solve the problem of vibration reduction of electrical components;
[0008] The use of vibration damping pads can usually only filter out the vibration excitation of the high-frequency part, and has an amplifying effect on the vibration excitation of the low-frequency part; this method may not fully meet the design function requirements, and will increase some parts and thus increase product costs.
[0009] Using glue to fix the top of the device has limited effect on improving the product. For example, the calculation and simulation show that in the vibration-sensitive direction of the integrated inductor made of powder metallurgy, the rigidity of the adhesive glue is small, resulting in insignificant constraint on the top of the inductor, and almost no improvement in the first-order mode and pin stress values. Using glue to reinforce the pins of the device often introduces additional expensive hard glue and requires the addition of a special glue coating device, which significantly increases production costs. Utility Model Content
[0010] A series of simplified concepts are introduced in the utility model content section, which are all simplifications of the prior art in the field, which will be further described in detail in the specific implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and necessary technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.
[0011] The technical problem to be solved by the utility model is to provide a PCB electrical component vibration reduction structure which can enhance the vibration reduction between electrical components (especially powder metallurgy inductors) and PCB.
[0012] In order to solve the above technical problems, the utility model provides a PCB electrical component vibration reduction structure, comprising: the side wall and the bottom wall of the electrical component 1 are formed with a welding bracket 2, the electrical lead 3 is fixed in the welding bracket 2, the electrical lead 3 is welded and fixed to the PCB 5 through the welding part 4, and also includes:
[0013] The vibration-damping portion 6 is formed in the gap between the welding bracket 2 , the electrical lead 3 and the electrical component 1 .
[0014] Optionally, the PCB electrical component vibration reduction structure is further improved, and the vibration reduction part 6 fills the gap;
[0015] Alternatively, the vibration damping portion 6 partially fills the gap.
[0016] Optionally, the PCB electrical component vibration reduction structure is further improved, and the vibration reduction portion 6 is formed into a spatial mesh distribution to fill the gap.
[0017] Spatial structure refers to an irregular shape that is not in a certain plane, such as a three-dimensional spatial spider web structure. The spatial mesh structure can effectively connect electrical components, welding brackets and electrical leads into a whole to reduce vibration, and select suitable materials to make the spatial mesh structure, such as flexible metal, solder, copper, etc. The spatial mesh structure will have a certain yield, allowing for slight deformation, which can further reduce vibration.
[0018] Optionally, the PCB electrical component vibration reduction structure is further improved, and the vibration reduction portion 6 is fixedly connected to the welding portion 4 at least at one point, and the connection and fixation with the welding portion 4 is to form an integrated structure to reduce vibration.
[0019] Optionally, the PCB electrical component vibration reduction structure is further improved, and the vibration reduction part 6 is formed into a plurality of parts.
[0020] Optionally, the PCB electrical component vibration reduction structure is further improved, and two opposite connections are formed at both ends of each vibration reduction part 6, the first connection is fixedly connected to the electrical lead 3, and the second connection is fixedly connected to the electrical component 1 and / or the welding bracket 2. For example, it is formed into a dumbbell shape.
[0021] Optionally, the PCB electrical component vibration reduction structure is further improved, and the vibration reduction part 6 partially fills the gap, and partially filling the gap is to reserve thermal expansion space for the vibration reduction part. Vibration only occurs when the vehicle is working, and vibration reduction is only required when it is working. When the electrical components are working, heat is generated. By making the vibration reduction part of iron, aluminum, copper or magnesium, the gap is filled as the vehicle is working, and a good vibration reduction effect can be formed.
[0022] Optionally, the PCB electrical component vibration reduction structure is further improved, and the vibration reduction part 6 is solder.
[0023] The working principle of the present utility model is explained using an inductor as an electrical element as follows;
[0024] Due to vibration excitation, the product's corresponding vibration displacement (i.e., amplitude) is formed in the vibration sensitive direction between the inductor body and the inductor pin. The inductor pin can be regarded as a cantilever beam, and the root of the pin (i.e., the soldering position) is the fixed point of the cantilever beam. The pin head is the position of the maximum deflection of the cantilever beam, which is caused by the displacement of the inductor body in space. The greater the displacement of the inductor body in space, the greater the deflection of the cantilever beam. For the same structure, the stress generated at the maximum stress point is also greater.
[0025] After adding the vibration damping part, since the space between the inductor pin and the inductor body is filled with the vibration damping part, taking solder as an example, the height of the solder is higher than the lowest height of the inductor body; during the vibration process, due to the existence of the internal solder, the internal solder of the two pins will constrain the vibration displacement of the inductor body, thereby reducing the maximum stress at the theoretical maximum stress point of the inductor of the structure and increasing the resonant frequency of the inductor itself; thereby reducing the failure risk of the inductor during the vibration process;
[0026] It should be noted that the best solution is to use solder paste to form the vibration reduction part. Since solder paste is used in the PCBA assembly process, the utility model does not need to introduce additional parts to improve the vibration resistance of electrical components (inductors); it reduces production investment and raw material costs, and can reduce production process steps without increasing production costs. Compared with the prior art, the solution of using vibration reduction pads and glue coating can reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The drawings of the present utility model are intended to illustrate the general characteristics of the methods, structures and / or materials used in specific exemplary embodiments of the present utility model, and to supplement the description in the specification. However, the drawings of the present utility model are schematic diagrams not drawn to scale, and thus may not accurately reflect the precise structure or performance characteristics of any given embodiment. The drawings of the present utility model should not be interpreted as limiting or restricting the range of values or properties covered by the exemplary embodiments of the present utility model. The present utility model is further described in detail below in conjunction with the drawings and specific embodiments:
[0028] Figure 1 It is a schematic diagram of the existing PCB electrical component welding structure.
[0029] Figure 2 It is a schematic diagram of the overall structure of the utility model.
[0030] Figure 3 This is a schematic diagram of a feasible embodiment of the vibration reduction part of the utility model Figure 1 .
[0031] Figure 4 This is a schematic diagram of a feasible embodiment of the vibration reduction part of the utility model Figure 2 .
[0032] Figure 5 This is a schematic diagram of a feasible embodiment of the vibration reduction part of the utility model Figure 3 .
[0033] Description of Reference Numerals
[0034] Electrical components 1
[0035] Welding bracket 2
[0036] Electrical lead 3
[0037] Welding section 4
[0038] PCB5
[0039] Vibration reduction unit 6. DETAILED DESCRIPTION
[0040] The following is an explanation of the implementation of the utility model by specific specific embodiments, and those skilled in the art can fully understand the other advantages and technical effects of the utility model from the content disclosed in this specification. The utility model can also be implemented or applied through different specific embodiments, and the details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the general design concept of the utility model. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. The following exemplary embodiments of the utility model can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described here. It should be understood that these embodiments are provided to make the disclosure of the utility model thorough and complete, and to fully convey the technical solutions of these exemplary specific embodiments to those skilled in the art. It should be understood that when an element is referred to as "connected" or "coupled" to another element, the element can be directly connected or coupled to another element, or there can be an intermediate element. The difference is that when an element is referred to as "directly connected" or "directly coupled" to another element, there is no intermediate element. In all the drawings, the same reference numerals always represent the same element. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0041] First embodiment;
[0042] refer to Figure 2 As shown, the utility model provides a PCB electrical component vibration reduction structure, including: the side wall and the bottom wall of the electrical component 1 are formed with a welding bracket 2, the electrical lead 3 is fixed in the welding bracket 2, and the electrical lead 3 is welded and fixed to the PCB 5 through the welding part 4, and also includes:
[0043] The vibration-damping portion 6 is formed in the gap between the welding bracket 2 , the electrical lead 3 and the electrical component 1 .
[0044] The gap is filled with the vibration damping part 6, which is solder.
[0045] Alternatively, the gap is partially filled with a vibration-damping part (6), and the vibration-damping part 6 is solder.
[0046] Second embodiment;
[0047] The utility model provides a PCB electrical component vibration reduction structure, which is a further improvement on the basis of the above first embodiment, and the same parts are not repeated here, including:
[0048] The vibration-damping part 6 is formed into a spatial network distribution to fill the gap, such as a spatial spider web structure, that is, a plurality of spider webs are irregularly distributed on different surfaces and intersect with each other to form an spatial spider web structure.
[0049] Third embodiment;
[0050] The utility model provides a PCB electrical component vibration reduction structure, which is a further improvement on the basis of the first embodiment or the second embodiment, and the same parts are not repeated here, including:
[0051] The vibration damping portion 6 is fixedly connected to the welding portion 4 at least at one location.
[0052] Fourth embodiment;
[0053] The utility model provides a PCB electrical component vibration reduction structure, which is a further improvement on the basis of the above first embodiment, and the same parts are not repeated here, including:
[0054] The vibration damping part 6 is formed in a plurality of parts, see Figure 3 to Figure 5 As shown, the vibration reduction part 6 is formed into a dumbbell shape as an example; two opposite connections are formed at both ends of each vibration reduction part 6, the first connection 6.1 is fixedly connected to the electrical lead 3, and the second connection 6.2 is fixedly connected to the electrical component 1 and / or the welding bracket 2.
[0055] Fifth embodiment;
[0056] The utility model provides a PCB electrical component vibration reduction structure, which is a further improvement on the basis of the above first embodiment, and the same parts are not repeated here, including:
[0057] The gap is partially filled with the vibration-damping part 6 , which is made of iron, aluminum, copper or magnesium.
[0058] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. It will also be understood that, unless explicitly defined herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant field, and not interpreted in an ideal or overly formal sense.
[0059] The present invention is described in detail above through specific implementation methods and examples, but these do not constitute limitations of the present invention. Without departing from the principle of the present invention, those skilled in the art may make many modifications and improvements, which should also be considered as the protection scope of the present invention.
Claims
1. A PCB electrical component vibration reduction structure, comprising: The side wall and the bottom wall of the electrical component (1) are formed with a welding bracket (2), the electrical lead (3) is fixed in the welding bracket (2), and the electrical lead (3) is welded and fixed to the PCB (5) through the welding part (4), and is characterized in that it also includes: A vibration damping portion (6) is formed in the gap between the welding bracket (2), the electrical lead (3) and the electrical component (1).
2. The PCB electrical component vibration reduction structure according to claim 1, characterized in that: The vibration-damping part (6) fills the gap; Alternatively, the vibration damping portion (6) partially fills the gap.
3. The PCB electrical component vibration reduction structure according to claim 2, characterized in that: The vibration-damping parts (6) are formed to be distributed in a spatial network to fill the gaps.
4. The PCB electrical component vibration reduction structure according to claim 1, characterized in that: The vibration-damping portion (6) is fixedly connected to the welding portion (4) at least at one point.
5. The PCB electrical component vibration reduction structure according to claim 1, characterized in that: The vibration damping part (6) is formed in plurality.
6. The PCB electrical component vibration reduction structure according to claim 5, characterized in that: Two opposite connection points are formed at both ends of each vibration-damping part (6), the first connection point is fixedly connected to the electrical lead (3), and the second connection point is fixedly connected to the electrical element (1) and / or the welding bracket (2).
7. The PCB electrical component vibration reduction structure according to claim 1, characterized in that: The vibration damping part (6) partially fills the gap.
8. The PCB electrical component vibration reduction structure according to claim 7, characterized in that: The vibration damping part (6) is made of iron, aluminum, copper or magnesium.
9. The PCB electrical component vibration reduction structure according to claim 1, characterized in that: The vibration damping part (6) is solder.