An electric control power module compression structure

Abstract

This utility model relates to the field of motor control technology, and in particular discloses an electronic control power module clamping structure, including a housing, multiple sets of electronic control modules, and a clamping unit. The multiple sets of electronic control modules are mounted on the housing via the clamping unit. The clamping unit includes a pressure plate, a clamping assembly, and fasteners. The pressure plate is connected to the housing via fasteners. The clamping assembly includes an elastic element and a limiting post. The limiting post is located between the pressure plate and the electronic control module, and the elastic element is located between the limiting post and the pressure plate. The pressure plate compresses the elastic element to provide a preload. The elastic element releases the preload and abuts against the electronic control module via the limiting post, so that the electronic control module is continuously clamped and abuts against the housing. This utility model allows multiple electronic control modules to be clamped simultaneously using a single pressure plate, thereby reducing the number of bolts used and the space occupied, resulting in a more compact structure, uniform clamping force distribution, and more flexible arrangement of the power modules, eliminating the need for customized integrated modules.

Description

Technical Field

[0001] This utility model relates to the field of motor control technology, and in particular discloses a pressing structure for an electronically controlled power module. Background Technology

[0002] In various electronic control devices, power modules are typically core components that need to be tightly fitted to the housing or heat dissipation substrate to ensure good heat conduction and structural stability. Traditional fixing methods usually involve multiple sets of screws, individual pressure plates, or even adhesive bonding.

[0003] However, the existing solution of using a pressure plate to clamp multiple power modules in the electronic control system requires space for mounting bolts between the modules, resulting in a large overall space occupied by the modules and making them not compact enough. The existing solution integrates multiple power modules into a single component with a fixed structure, which does not allow for flexible module installation and layout and requires customization.

[0004] Therefore, there is an urgent need for a compact, reliable, uniformly clamping force, and elastically compensated electric power module clamping structure to meet the design requirements of high integration and high reliability. Utility Model Content

[0005] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide an electronically controlled power module clamping structure that is compact, reliable in installation, uniform in clamping force and has elastic compensation capability.

[0006] To achieve the above objectives, this utility model provides an electronically controlled power module clamping structure, comprising a housing, multiple sets of electronically controlled modules, and a clamping unit. The multiple sets of electronically controlled modules are mounted on the housing via the clamping unit. The clamping unit includes a pressure plate, a clamping assembly, and fasteners. The pressure plate is connected to the housing via the fasteners. The clamping assembly includes an elastic element and a limiting post. The limiting post is located between the pressure plate and the electronically controlled modules, and the elastic element is located between the limiting post and the pressure plate. The pressure plate compresses the elastic element to provide a preload. The elastic element releases the preload and abuts against the electronically controlled modules via the limiting post, thereby continuously clamping the electronically controlled modules against the housing.

[0007] Specifically, the pressure plate has a stepped plane protruding outward from the pressure plate. The stepped plane abuts against the elastic element, and is used to evenly distribute the clamping force acting on the electronic control module. The stepped plane of the pressure plate provides a consistent contact surface for the disc spring or other elastic element, making the force center height of multiple clamping components consistent. During clamping, the pressure on each module is more consistent, improving the consistency of the clamping state of each electronic control module and avoiding damage to the module due to local loosening or over-clamping. Unlike ordinary flat pressure plate structures, the stepped surface design has both structural support and mechanical balance functions, improving clamping reliability and stress distribution uniformity.

[0008] Specifically, one end of the limiting post is a cylindrical mounting part, and the other end of the limiting post is a stop part for abutting the electronic control module. The elastic element is sleeved on the mounting part, with one end of the elastic element abutting the stop part and the other end of the elastic element abutting the pressure plate.

[0009] Specifically, the pressure plate is provided with a first through hole and a second through hole. The first through hole is located on the stepped plane and is used to install the mounting part of the limiting post. There are two sets of second through holes, which are located at opposite ends of the pressure plate. Fasteners pass through the second through holes and are connected to the outer shell.

[0010] Specifically, the clamping assembly is provided in multiple sets, and each set of clamping assemblies corresponds to a set of electronic control modules.

[0011] Specifically, the elastic element is a disc spring. Disc springs can provide a large and stable elastic force under axial compression, making them suitable for compression scenarios with limited space.

[0012] Specifically, the disc springs are provided in two sets, and the two sets of disc springs are stacked in the same direction.

[0013] Specifically, the outer shell is provided with a positioning groove, and the electronic control module is placed in the positioning groove. The positioning groove is used to prevent the electronic control module from shifting during the pressing process.

[0014] Specifically, a thermal pad is provided between the electronic control module and the housing to improve the heat dissipation efficiency of the electronic control module.

[0015] Specifically, an anti-slip structure is provided between the limiting post and the electronic control module. The anti-slip structure includes an anti-displacement adhesive layer or a rubber gasket. The anti-slip structure is used to enhance the friction between the limiting post and the electronic control module and prevent the electronic control module from displacing in a high-vibration environment.

[0016] The beneficial effects of this utility model are as follows: Under the action of fasteners, the pressure plate compresses the elastic element downwards, and the elastic element stores pre-tightening energy. After installation, the elastic element continuously releases this pre-tightening force, which is transmitted to the top surface of the electronic control module through the limiting post, thereby keeping the electronic control module always tightly attached to the base surface of the outer shell. It provides continuous and stable clamping force, avoiding loosening caused by thermal expansion and contraction and structural aging, improving contact reliability and heat conduction efficiency. It replaces the traditional rigid screw pressing method and introduces an integrated structure of "elastic clamping + limiting guidance", which has high integration and strong adaptability, and improves installation reliability and mechanical performance. At the same time, the limiting post plays a structural support role, so that the pressure plate only contacts the electronic control module through the limiting post when it is compressed downwards, thereby forming a gap between the pressure plate and the electronic control module below. The gap formed helps the hot air convection flow, improves the heat dissipation effect of the module, and prevents the pressure plate from becoming a heat barrier layer. Traditional clamping structures often directly press the pressure plate against the top of the module, resulting in heat accumulation. This structure forms a gap through the limiting post, optimizing the heat dissipation channel, which is an optimized solution for integrated structural heat dissipation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the pressing structure of an electronically controlled power module according to the present invention;

[0018] Figure 2 This is a cross-sectional schematic diagram of a pressing structure for an electronically controlled power module according to the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the pressure plate of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the limiting post of this utility model;

[0021] Figure 5 for Figure 2 Partial schematic diagram of section A;

[0022] Figure 6 for Figure 2 Partial schematic diagram of section B.

[0023] The reference numerals in the figures include:

[0024] 1. Housing; 2. Electrical control module; 3. Clamping unit; 4. Pressure plate; 5. Clamping assembly; 6. Fastener; 7. Elastic element; 8. Limiting post; 9. Stepped plane; 10. Mounting part; 11. Stopping part; 12. First through hole; 13. Second through hole; 14. Positioning groove; 15. Thermal pad. Detailed Implementation

[0025] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0026] Please see Figures 1 to 6As shown, the present invention discloses an electronically controlled power module clamping structure, comprising a housing 1, multiple sets of electronically controlled modules 2, and a clamping unit 3. The multiple sets of electronically controlled modules 2 are mounted on the housing 1 via the clamping unit 3. The clamping unit 3 includes a pressure plate 4, a clamping assembly 5, and fasteners 6. The pressure plate 4 is connected to the housing 1 via the fasteners 6. The clamping assembly 5 includes an elastic element 7 and a limiting post 8. The limiting post 8 is located between the pressure plate 4 and the electronically controlled modules 2, and the elastic element 7 is located between the limiting post 8 and the pressure plate 4. The pressure plate 4 compresses the elastic element 7 to provide a preload, and the elastic element 7 releases the preload and abuts against the electronically controlled modules 2 via the limiting post 8, so that the electronically controlled modules 2 are continuously clamped and abut against the housing 1. The pressure plate 4 compresses the elastic element 7 downward under the action of the fastener 6, and the elastic element 7 stores pre-tightening energy. After installation, the elastic element 7 continuously releases the pre-tightening force, and the force is transmitted to the top surface of the electronic control module 2 by means of the limiting post 8, thereby keeping the electronic control module 2 always in close contact with the base surface of the outer shell 1. It provides continuous and stable clamping force, avoids loosening caused by thermal expansion and contraction and structural aging, improves contact reliability and heat conduction efficiency, replaces the traditional rigid screw pressing method, and introduces an integrated structure of "elastic clamping + limiting guide", which has high integration and strong adaptability, and improves installation reliability and mechanical performance.

[0027] Meanwhile, the limiting post 8 serves as structural support, ensuring that the pressure plate 4 only contacts the electronic control module 2 through the limiting post 8 when compressed downwards, thus creating a gap between the pressure plate 4 and the electronic control module 2 below. This gap facilitates hot air convection, improving the module's heat dissipation and preventing the pressure plate 4 from becoming a heat barrier layer. Traditional compression structures often directly press the pressure plate 4 against the top of the module, leading to heat accumulation; this structure, by creating a gap through the limiting post 8, optimizes the heat dissipation channel, representing an integrated structural and heat dissipation optimization solution.

[0028] The pressure plate 4 has a stepped plane 9 protruding outward from the pressure plate 4. The stepped plane 9 abuts against the elastic element 7 and is used to distribute the clamping force acting on the electronic control module 2 evenly. The stepped plane 9 of the pressure plate 4 provides a consistent contact surface for the disc spring or other elastic element 7, making the force center height of multiple sets of clamping components 5 consistent. When clamping, the pressure on each module is more consistent, improving the consistency of the clamping state of each electronic control module 2 and avoiding local loosening or over-clamping that could damage the module. Unlike the structure of a normal flat pressure plate 4, the stepped surface design has both structural support and mechanical balance functions, improving clamping reliability and stress distribution uniformity.

[0029] One end of the limiting post 8 is a cylindrical mounting part 10, and the other end is a stop part 11 for contacting the electronic control module 2. The elastic element 7 is sleeved on the mounting part 10, with one end of the elastic element 7 contacting the stop part 11 and the other end contacting the pressure plate 4. The cylindrical mounting part 10 provides stable guidance and positioning for the elastic element 7, and the stop part 11 is used to accurately press against the top surface of the module. Through this structure, the clamping force is transmitted more linearly and stably, without eccentricity; it ensures the stability of the working stroke of the elastic element and prevents skewed pressing; it improves the stability and centering of the clamping direction of the electronic control module 2; compared with traditional simple pins or studs, the "guide + stop" composite structure of the limiting post 8 improves the mechanical reliability of the clamping assembly 5, and is especially suitable for high-frequency thermal cycling environments.

[0030] The pressure plate 4 is provided with a first through hole 12 and a second through hole 13. The first through hole 12 is located on the stepped plane 9 and is used to install the mounting part 10 of the limiting post 8. There are two sets of second through holes 13, which are located at opposite ends of the pressure plate 4. Fasteners 6 pass through the second through holes 13 and are connected to the outer shell 1. The positioning of the limiting post 8 and the bolt fixing channel are guided by the precision through holes, so that the limiting post 8 and the pressure plate 4 do not deviate during the assembly process, and the fasteners 6 are fixed at a distance to increase stability and torsional performance. The components are installed accurately and the structure is stable, which facilitates automated assembly and maintenance disassembly and assembly, and improves the overall mechanical stability. The multi-hole pressure plate 4 structure introduces a "pressure guiding + fastening" dual-channel design, which is more stable and engineering adaptable than the traditional single-hole pressure plate 4.

[0031] The clamping assembly 5 is provided in multiple sets, and each set of clamping assemblies 5 corresponds one-to-one with a set of electronic control modules 2. This solves the problem of existing solutions where multiple power modules of electronic control are clamped by a single pressure plate 4, which requires space between the modules for mounting bolts, resulting in a large overall space occupied by the modules and making them less compact.

[0032] The elastic element 7 is a disc spring. Disc springs provide a large and stable elastic force under axial compression, making them suitable for clamping scenarios with limited space. They have a high spring constant, allowing for precise control of the preload process; their compact design and large output force in a short stroke make them suitable for providing continuous clamping force in small spaces; and their superior force curve stability compared to coil springs makes them particularly suitable for electronic module fixing scenarios.

[0033] The disc springs are provided in two sets, which are stacked in opposite directions. This stacking method achieves a larger compression stroke and a smoother force curve. When the directions are the same, the rigidity is enhanced, and when the directions are opposite, the buffering effect is enhanced. The specific configuration can be adjusted as needed to further increase the elastic energy storage capacity, shock absorption performance, and compression balance, and to adapt to more complex environments with temperature drift and assembly tolerances.

[0034] The outer shell 1 is provided with a positioning groove 14, and the electronic control module 2 is placed in the positioning groove 14. The positioning groove 14 is used to prevent the electronic control module 2 from shifting during the pressing process. The groove structure limits the electronic control module 2 in the X / Y directions, ensuring that the module maintains a stable position during the pressing process, improving the fitting accuracy, preventing slippage and displacement during pressing or transportation, enhancing reliability and safety, improving production assembly consistency, decoupling the structural limiting structure from the force pressing structure, providing additional constraints during the assembly process, and is an optimization of the traditional non-auxiliary positioning structure.

[0035] A thermally conductive pad 15 is provided between the electronic control module 2 and the outer casing 1. The thermally conductive pad 15 is used to improve the heat dissipation efficiency of the electronic control module 2. The thermally conductive pad 15 is located between the bottom of the electronic control module 2 and the contact surface of the outer casing 1. It is used to fill tiny gaps, has a high thermal conductivity, enhances heat conduction efficiency, reduces the junction temperature of the module, prevents overheating failure of power devices, and extends service life. It is suitable for applications with high power density or long operating time.

[0036] Specifically, the thermal pad 15 can be made of silicone pads with high thermal conductivity, phase change material pads, etc., to enhance the heat dissipation performance of the electronic control module 2.

[0037] An anti-slip structure is provided between the limiting post 8 and the electronic control module 2. The anti-slip structure includes an anti-displacement adhesive layer or rubber gasket. The anti-slip structure is used to enhance the friction between the limiting post 8 and the electronic control module 2, preventing the electronic control module 2 from displacing under high vibration environments. It effectively suppresses the micro-displacement and fatigue wear of the module caused by vibration, enhances safety under vibration conditions, and increases the interface friction elements compared to traditional hard-press surface contact, thereby improving the structural seismic resistance and module fixation stability.

[0038] In this embodiment, the thermal pad 15 is attached or embedded in the positioning groove 14 of the outer shell 1. Multiple sets of electronic control modules 2 are sequentially installed on the thermal pad 15 and accurately placed into the preset positioning groove 14 inside the outer shell 1. Two sets of disc springs are sequentially sleeved on the mounting part 10 of each limiting post 8, with the disc springs facing each other. The limiting post 8 is inserted through the first through hole 12 on the pressure plate 4. Each set of electronic control modules 2 corresponds to one set of limiting posts 8. The mounting part 10 of the limiting post 8 passes through the through hole for positioning. The stop part 1 With the disc spring facing downwards and aligned with the top of the electronic control module 2, one end of the disc spring abuts against the stop part 11 (near the electronic control module 2), and the other end abuts against the stepped plane 9 below the pressure plate 4. Fasteners 6 (such as screws) are used to pass through the second through holes 13 at both ends of the pressure plate 4 and screwed into the threaded holes of the outer shell 1. Each fastener 6 is tightened evenly, causing the pressure plate 4 to press down. The disc spring is deformed under pressure and stores energy. At this time, the elastic element 7 generates a preload force and applies the force continuously to the top of the electronic control module 2 through the limiting post 8, so that the module is stably pressed against the outer shell 1.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A pressing structure for an electronically controlled power module, comprising a housing (1), multiple sets of electronically controlled modules (2), and a pressing unit (3), wherein the multiple sets of electronically controlled modules (2) are mounted on the housing (1) via the pressing unit (3); characterized in that: The clamping unit (3) includes a pressure plate (4), a clamping assembly (5), and a fastener (6). The pressure plate (4) is connected to the outer shell (1) via the fastener (6). The clamping assembly (5) includes an elastic element (7) and a limiting post (8). The limiting post (8) is located between the pressure plate (4) and the electronic control module (2). The elastic element (7) is located between the limiting post (8) and the pressure plate (4). The pressure plate (4) compresses the elastic element (7) to provide a preload. The elastic element (7) releases the preload and abuts against the electronic control module (2) via the limiting post (8), so that the electronic control module (2) is continuously clamped and abuts against the outer shell (1).

2. The electronically controlled power module clamping structure according to claim 1, characterized in that: The pressure plate (4) is provided with a stepped plane (9) that protrudes outward from the pressure plate (4). The stepped plane (9) abuts against the elastic element (7). The stepped plane (9) is used to make the clamping force acting on the electronic control module (2) evenly distributed.

3. The electronically controlled power module clamping structure according to claim 2, characterized in that: One end of the limiting post (8) is a cylindrical mounting part (10), and the other end of the limiting post (8) is a stop part (11) for abutting the electronic control module (2). The elastic element (7) is sleeved on the mounting part (10). One end of the elastic element (7) abuts the stop part (11), and the other end of the elastic element (7) abuts the pressure plate (4).

4. The electronically controlled power module clamping structure according to claim 3, characterized in that: The pressure plate (4) is provided with a first through hole (12) and a second through hole (13). The first through hole (12) is located on the step plane (9) for installing the mounting part (10) of the limiting post (8). The second through hole (13) is provided in two sets, and the two sets of second through holes (13) are located at opposite ends of the pressure plate (4). The fastener (6) passes through the second through hole (13) and is connected to the outer shell (1).

5. The electronically controlled power module clamping structure according to claim 1, characterized in that: The clamping assembly (5) is provided in multiple sets, and each set of clamping assemblies (5) corresponds to a set of electronic control modules (2).

6. The electronically controlled power module clamping structure according to claim 1, characterized in that: The elastic element (7) is a disc spring.

7. The electronically controlled power module clamping structure according to claim 6, characterized in that: The disc springs are provided in two sets, and the two sets of disc springs are stacked in the same direction.

8. The electronically controlled power module clamping structure according to claim 1, characterized in that: The outer shell (1) is provided with a positioning groove (14), and the electronic control module (2) is placed in the positioning groove (14). The positioning groove (14) is used to prevent the electronic control module (2) from shifting during the pressing process.

9. The electronically controlled power module clamping structure according to claim 1, characterized in that: A thermal pad (15) is provided between the electronic control module (2) and the outer casing (1), and the thermal pad (15) is used to improve the heat dissipation efficiency of the electronic control module (2).

10. The electronically controlled power module clamping structure according to claim 1, characterized in that: An anti-slip structure is provided between the limiting post (8) and the electronic control module (2). The anti-slip structure includes an anti-displacement adhesive layer or a rubber gasket. The anti-slip structure is used to enhance the friction between the limiting post (8) and the electronic control module (2) to prevent the electronic control module (2) from displacing in a high-vibration environment.

Images