Crimping type IGBT test tool convenient to replace
By dividing the pressure block into a general tooling and a pressure block, and adopting a sliding connection design, the problem of difficult replacement of existing IGBT test tooling is solved, realizing the easy and quick replacement of the pressure block, which is suitable for testing press-fit IGBT modules.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-03-24
AI Technical Summary
Existing IGBT testing fixtures require significant arm strength or tools to replace the clamping block, and replacement is difficult at high temperatures, resulting in inconvenient operation.
The pressure block is divided into a general tooling and a pressure block, and adopts a sliding connection design, which makes the pressure block detachable and simplifies the replacement process.
It enables convenient and quick replacement of pressure blocks, and can quickly adapt to different pressure-fit IGBT modules, especially under high temperature conditions.
Smart Images
Figure CN224035550U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the testing of crimp-type IGBT modules, and more particularly to a crimp-type IGBT testing fixture that is easy to replace. Background Technology
[0002] IGBT (Insulated Gate Bipolar Transistor) is a composite fully controllable voltage-driven power semiconductor device with the advantages of high input impedance and low on-state voltage drop.
[0003] After production, IGBTs require performance testing. During the testing of press-fit IGBT modules, different upper and lower pressure blocks on the press are needed to protect the surface of the IGBT from damage. To ensure better electrical and thermal conductivity, the pressure blocks are typically made of copper and weigh around 15 kg. In actual testing, the upper pressure block of the test fixture is usually hoisted using a locking pin method. Installing the upper pressure block requires aligning the locking pin with the pin hole in the upper pressure block and then tightening it with screws, which is very difficult. This installation method usually requires considerable arm strength or other tools when replacing the pressure block, and the high temperature makes pressure block replacement even more difficult. Utility Model Content
[0004] To address the aforementioned technical problems, this utility model proposes a novel, easily replaceable crimp-type IGBT testing fixture. The heavy pressure block is divided into a general-purpose fixture and the pressure block itself, allowing for convenient and quick replacement of the pressure block to adapt to different crimp-type IGBT modules.
[0005] This utility model discloses a replaceable press-fit IGBT test fixture, comprising: an upper press module and a lower press module. The IGBT module to be tested is disposed between the upper press module and the lower press module. The upper press module includes a universal upper press fixture and an upper press block. The upper press block is detachably connected to the universal upper press fixture, and the lower surface of the upper press block contacts the IGBT module to be tested.
[0006] In one embodiment, the press block on the press is slidably connected to the universal tooling on the press.
[0007] In one embodiment, slide rails are provided on both sides of the bottom of the universal tooling on the press, and the pressing block on the press slides along the slide rails at the bottom of the universal tooling on the press.
[0008] In one embodiment, the slide rail is an L-shaped groove symmetrically arranged at the bottom of the universal tooling on the press, and the pressing block on the press is arranged between the opposite L-shaped grooves and slides along the L-shaped grooves.
[0009] In one embodiment, the press lowering module includes a press lower universal tooling and a press lowering block. The press lowering block is detachably connected to the press lower universal tooling, and the upper surface of the press lowering block is in contact with the IGBT module to be tested.
[0010] In one embodiment, the press upper pressure module further includes a press upper pressure bearing seat, and the press upper universal tooling is fixedly installed at the bottom of the press upper pressure bearing seat. The press upper pressure bearing seat is connected to the press body and transmits pressure to the press upper universal tooling.
[0011] In one embodiment, the press lower pressure module further includes a press lower pressure bearing seat, and the press lower universal tooling is fixedly installed on the top of the press lower pressure bearing seat. The press lower pressure bearing seat is connected to the press body and bears pressure.
[0012] In one embodiment, the lower press block is detachably connected to the lower universal tooling of the press via a positioning pin.
[0013] In one embodiment, slide rails are respectively provided on both sides of the top of the universal tooling under the press, and the press block slides along the slide rails on the top of the universal tooling under the press.
[0014] In one embodiment, the slide rail is an L-shaped groove symmetrically arranged on the top of the universal tooling under the press, and the press lower block is arranged between the opposite L-shaped grooves and slides along the L-shaped grooves.
[0015] Compared with the prior art, the easy-to-replace crimp-type IGBT test fixture of this utility model divides the heavy pressure block into a general fixture and a pressure block. The general fixture and the pressure block are detachably connected, so that only the pressure block needs to be replaced when changing. Even at high temperatures, the pressure block can be easily and quickly replaced to adapt to different crimp-type IGBT modules.
[0016] The above-mentioned technical features can be combined in various technically feasible ways to generate new implementation schemes, as long as the purpose of this utility model can be achieved. Attached Figure Description
[0017] The present invention will now be described in more detail based on embodiments that are not limiting only, and with reference to the accompanying drawings. Wherein:
[0018] Figure 1 This shows a schematic diagram of the structure of a press-fit IGBT test fixture in the prior art;
[0019] Figure 2 An exploded view of the easily replaceable crimp-type IGBT test fixture according to the present invention is shown.
[0020] Figure 3 Showing Figure 2 The diagram shows the structure of the test fixture of this utility model after crimping.
[0021] In the figures, identical components are labeled with the same reference numerals. The figures are not drawn to scale.
[0022] The attached figures are labeled as follows:
[0023] 1. Press upper pressure module; 11. Press upper pressure block; 12. Press upper general tooling; 121. Slide rail; 13. Press upper pressure bearing seat; 2. Press lower module; 21. Press lower pressure module; 22. Press lower general tooling; 23. Press lower pressure bearing seat; 3. IGBT module to be tested; 4. Positioning pin. Detailed Implementation
[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, as long as there is no conflict, the various embodiments and features of the present invention can be combined with each other, and the resulting technical solutions are all within the protection scope of the present invention.
[0025] The parts not mentioned in this utility model can be achieved by adopting or referencing existing technologies.
[0026] During the testing of crimped IGBT modules, to protect the surface of the IGBT under test from damage, different upper and lower pressure blocks of the press are required for testing different IGBTs. Figure 1 As shown, the commonly used test fixtures usually use positioning pins 4 or locking pins to fix the upper pressure block 11 on the upper pressure seat 13 of the press. Therefore, a great deal of arm strength or other tools are required to replace the upper pressure block. Furthermore, the locking pin needs to be aligned with the pin hole in the upper pressure block and then tightened with screws for hoisting, which makes alignment difficult. In addition, the high temperature makes the replacement of the pressure block even more difficult.
[0027] Therefore, this utility model proposes a crimp-type IGBT testing fixture that facilitates the replacement of the upper pressure block, such as... Figure 2 and Figure 3As shown, the press-fit IGBT testing fixture of this utility model includes an upper press module 1 and a lower press module 2. The IGBT module 3 to be tested is disposed between the upper press module 1 and the lower press module 2. The upper press module 1 includes a universal upper press fixture 12 and an upper press block 11. The upper press block 11 is detachably connected to the universal upper press fixture 12. The lower surface of the upper press block 11 is in contact with the IGBT module 3 to be tested.
[0028] The pressure-fit IGBT testing fixture of this invention divides the traditional upper pressure block into two parts: a general-purpose fixture for the press and an upper pressure block for the press. This reduces the weight of the upper pressure block and makes it easier and faster to change different upper pressure blocks for different presses.
[0029] In an optional embodiment, the upper press block 11 is slidably connected to the press universal fixture 12. This slidable connection allows for easy and convenient securing of the upper press block and universal fixture in place without the need for alignment with pin holes during hoisting. This makes changing different upper press blocks easier and faster, even at high temperatures.
[0030] In one embodiment, slide rails 121 are respectively provided on both sides of the bottom of the universal tooling 12 on the press, and the pressing block 11 on the press slides along the slide rails 121 on the bottom of the universal tooling 12 on the press.
[0031] The sliding connection between the pressing block 11 and the universal tooling 12 on the press is achieved by installing a slide rail at the bottom of the universal tooling 12 on the press. The structure is simple, convenient and quick.
[0032] In one specific embodiment, the slide rail 121 is an L-shaped groove symmetrically arranged at the bottom of the universal tooling 12 on the press, and the pressing block 11 on the press is arranged between the opposite L-shaped grooves and slides along the L-shaped grooves.
[0033] The slide rails are arranged in symmetrical L-shaped slots, making the universal tooling 12 on the press resemble a drawer. The pressure block 11 on the press can be easily pushed into or pulled out of the slot by pulling it out along the L-shaped slot, without the need to align the pin hole, thus enabling easy and quick replacement of the pressure block on the press.
[0034] In other alternative embodiments, the sliding connection between the press block 11 and the press general-purpose tooling 12 can also adopt other slide rail forms. For example, the slide rail is provided on the side of the press block 11, and the bottom of the press general-purpose tooling 12 is engaged with the slide rail on the side of the press block 11.
[0035] In an optional embodiment, the press lowering module 2 includes a press lower universal tooling 22 and a press lowering block 21. The press lowering block 21 is detachably connected to the press lower universal tooling 22, and the upper surface of the press lowering block 21 contacts the IGBT module 3 to be tested.
[0036] In this embodiment, the traditional press lower pressure block is divided into two parts: a press lower universal tooling 22 and a press lower pressure block 21. This reduces the weight of the lower pressure block and makes it easier and faster to replace different press lower pressure blocks.
[0037] In an optional embodiment, the press upper pressure module 1 further includes a press upper pressure bearing seat 13, and a press upper universal tooling 12 is fixedly disposed at the bottom of the press upper pressure bearing seat 13. The press upper pressure bearing seat 13 is connected to the press body and transmits pressure to the press upper universal tooling.
[0038] Optionally, the universal tooling 12 on the press can be fixed to the bottom of the pressure seat 13 on the press by a positioning pin or other positioning element (such as a locking pin). In this way, when replacing the pressure block 11 on the press, the pressure block can be easily replaced by simply pulling and pushing the pressure block 11 on the press, without having to replace the heavy universal tooling 12 on the press together.
[0039] In an optional embodiment, the press lower pressure module 2 further includes a press lower pressure bearing seat 23, and a press lower universal tooling 22 is fixedly installed on the top of the press lower pressure bearing seat 23. The press lower pressure bearing seat 23 is connected to the press body and bears pressure.
[0040] Optionally, the universal tooling 22 for the lower press can be fixed to the bottom of the pressure seat 13 on the upper press by a locating pin or other locating element (such as a locking pin). In this way, when replacing the lower press block 21, only the lower press block 21 needs to be replaced, without having to replace the heavy universal tooling 12 on the upper press together. This makes replacing the lower press block easier and faster.
[0041] In one specific embodiment, the lower press block 21 can be detachably connected to the lower universal tooling 22 of the press via a positioning pin 4 or other positioning element (such as a locking pin).
[0042] Although the lower press block 21 is easier to replace than the upper press block 11, in other alternative embodiments, the lower press block 21 and the lower press universal tooling 22 can also be detachably connected by sliding. For example, similar to the structure of the upper press universal tooling 12, slide rails (not shown in the figure) can be provided on both sides of the top of the lower press universal tooling 22, and the lower press block 21 slides along the slide rails on the top of the lower press universal tooling 22.
[0043] In a more specific embodiment, the slide rail is an L-shaped groove symmetrically arranged on the top of the universal tooling under the press, and the press lower block is arranged between the opposite L-shaped grooves and slides along the L-shaped grooves.
[0044] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "comprising" or "including," and similar words used in this invention, mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. In the description of this invention, the terms "upper," "lower," "side," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. When the absolute position of the described object changes, the relative positional relationship may also change accordingly, and therefore should not be construed as a limitation of this invention.
[0045] Therefore, those skilled in the art should recognize that although the present invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A replaceable crimp-type IGBT testing fixture, characterized in that, include: The press includes an upper pressure module and a lower pressure module. The IGBT module to be tested is located between the upper pressure module and the lower pressure module. The upper pressure module includes a press general-purpose tooling and a press upper pressure block. The press upper pressure block is detachably connected to the press general-purpose tooling. The lower surface of the press upper pressure block is in contact with the IGBT module to be tested.
2. The easily replaceable crimp-type IGBT test fixture according to claim 1, characterized in that, The upper pressure block of the press is slidably connected to the general tooling on the press.
3. The easily replaceable crimp-type IGBT test fixture according to claim 1 or 2, characterized in that, The universal tooling on the press is provided with slide rails on both sides of the bottom, and the pressing block on the press slides along the slide rails at the bottom of the universal tooling on the press.
4. The easily replaceable crimp-type IGBT test fixture according to claim 3, characterized in that, The slide rail is an L-shaped groove symmetrically arranged at the bottom of the universal tooling on the press. The pressing block on the press is arranged between the opposite L-shaped grooves and slides along the L-shaped grooves.
5. The easily replaceable crimp-type IGBT test fixture according to claim 4, characterized in that, The press lowering module includes a press lower universal tooling and a press lowering block. The press lowering block is detachably connected to the press lower universal tooling, and the upper surface of the press lowering block is in contact with the IGBT module to be tested.
6. The easily replaceable crimp-type IGBT test fixture according to claim 5, characterized in that, The press upper pressure module also includes a press upper pressure bearing seat. The press upper universal tooling is fixedly installed at the bottom of the press upper pressure bearing seat. The press upper pressure bearing seat is connected to the press body and transmits pressure to the press upper universal tooling.
7. The easily replaceable crimp-type IGBT test fixture according to claim 6, characterized in that, The press lower pressure module also includes a press lower pressure bearing seat. The press lower universal tooling is fixedly installed on the top of the press lower pressure bearing seat. The press lower pressure bearing seat is connected to the press body and bears the pressure.
8. The easily replaceable crimp-type IGBT test fixture according to claim 5, characterized in that, The lower press block is detachably connected to the lower universal tooling of the press via a positioning pin.
9. The easily replaceable crimp-type IGBT test fixture according to claim 5, characterized in that, The universal tooling under the press is provided with slide rails on both sides of the top, and the press block slides along the slide rails on the top of the universal tooling under the press.
10. The easily replaceable crimp-type IGBT test fixture according to claim 9, characterized in that, The slide rail is an L-shaped groove symmetrically arranged on the top of the universal tooling under the press. The press lower block is arranged between the opposite L-shaped grooves and slides along the L-shaped grooves.