Floating support IGBT press-fitting mechanism

Abstract

The utility model relates to the field of IGBT (Insulated Gate Bipolar Translator) production, and discloses a floating support IGBT press-fitting mechanism which comprises a portal frame, a servo press-fitting mechanism is arranged on the surface of the portal frame, a floating mechanism is arranged at the bottom of the servo press-fitting mechanism, and a jacking positioning mechanism is arranged at the bottom of the portal frame. A positioning tool is arranged at the top of the jacking and positioning mechanism, the jacking and positioning mechanism comprises a push-pull air cylinder, a guide column is arranged on the outer wall of the push-pull air cylinder, a supporting plate is slidably connected to the outer wall of the guide column, a rolling bearing is arranged on the surface of the supporting plate, and the servo press-fitting mechanism comprises a servo electric cylinder. A balance air cylinder is arranged on the outer wall of the servo electric cylinder, and the output end of the balance air cylinder is fixedly connected with a fixing plate. According to the utility model, the floating support structure is arranged, so that the phenomenon of overpressure or insufficient pressure in the press-fitting process is avoided, the press-fitting uniformity is ensured, the overall performance of the IGBT is improved, and the service life of the IGBT is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to IGBT production field especially, and relates to a floating support's IGBT press fitting mechanism. BACKGROUND

[0002] IGBT is a kind of compound full-control voltage drive type power semiconductor device, is composed of bipolar triode and insulated gate field effect transistor, it combines the high input impedance of MOSFET and the advantage of low on-voltage drop of GTR, has the characteristics of small driving power, low saturation voltage drop, IGBT is very suitable for being applied to the commutation system of direct voltage 600V and above, such as ac motor, frequency converter, switching power supply, lighting circuit, traction drive etc., IGBT is the core device of energy conversion and transmission, colloquially known as the "CPU" of power electronics device, is widely used in rail transit, smart grid, aerospace, electric vehicle and new energy equipment etc.

[0003] In the production process of IGBT, press fitting is a key step, mainly involves installing IGBT chip to module substrate, and is fixed by press fitting tool, this step ensures the good electrical and mechanical connection between chip and substrate, is the important link to guarantee the performance and reliability of IGBT module, when press fitting IGBT, special press fitting equipment is used to apply pressure to IGBT chip, so that it is closely combined with metal substrate.This process needs to accurately control pressure and press fitting speed to avoid damaging chip.

[0004] In the existing press fitting technology, since IGBT is a precision component, and its structure is relatively fragile, lack of floating support in the process of press fitting can lead to the risk of insufficient pressure or overpressure, so that it is difficult to ensure the uniformity of contact between IGBT chip and collector, affect the performance and reliability of device, therefore, a floating support's IGBT press fitting mechanism is proposed to solve the above problems. Utility model content

[0005] In order to make up for the above shortcomings, the utility model provides a floating support's IGBT press fitting mechanism, aims at improving the problem that the floating support's IGBT press fitting mechanism in prior art lacks to provide floating support for IGBT when press fitting, leads to overpressure or insufficient pressure, reduces press fitting effect.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a floating support's IGBT press fitting mechanism, including portal frame, the surface of portal frame is provided with servo press fitting mechanism, the bottom of servo press fitting mechanism is provided with floating mechanism, the bottom of portal frame is provided with jacking positioning mechanism, the top of jacking positioning mechanism is provided with positioning tool, jacking positioning mechanism includes push -and -pull air cylinder, the outer wall of push -and -pull air cylinder is provided with guide column, the outer wall sliding connection of guide column has support plate, the surface of support plate is provided with rolling bearing, servo press fitting mechanism includes servo cylinder, the outer wall of servo cylinder is provided with balance air cylinder, the output of balance air cylinder is fixedly connected with fixed plate, the top of fixed plate is fixedly connected with guide rod, floating mechanism includes pressure head guide bush, the surface of pressure head guide bush is provided with snap pin, the inner wall sliding connection of pressure head guide bush has pressure head body, the bottom of pressure head guide bush is fixedly connected with butterfly spring.

[0007] As further description of the above technical scheme:

[0008] The inner surface of the support plate is adapted to the outer wall of the rolling bearing.

[0009] As further description of the above technical scheme:

[0010] The output of the servo cylinder is fixedly connected with the top of the fixed plate, and the servo cylinder is located at the center of the fixed plate.

[0011] As further description of the above technical scheme:

[0012] The servo cylinder is fixedly connected with the outer wall of the portal frame through the connecting plate.

[0013] As further description of the above technical scheme:

[0014] The pressure head guide bush is fixedly connected with the bottom of the fixed plate.

[0015] The utility model has the advantages of:

[0016] 1、The utility model discloses a floating mechanism, jacking positioning mechanism, servo press fitting mechanism are provided when press fitting IGBT and provide floating support function to it, avoid the phenomenon that overpressure or pressure deficiency appears in the process of press fitting, thereby ensure the uniformity of press fitting, improve IGBT overall performance and service life.

[0017] 2、The utility model discloses the cooperation of the guide rod and balance air cylinder arranged in the servo press fitting mechanism, which can offset the unbalanced force caused by gravity, friction and other external forces during the press fitting process, ensuring the stability during the press fitting process. DRAWINGS

[0018] Figure 1 A main body structure side view schematic diagram of the IGBT press fitting mechanism of the floating support is provided in the utility model;

[0019] Figure 2 A main body structure side view schematic diagram of the IGBT press fitting mechanism of the floating support is provided in the utility model; Figure 1 A middle A area enlarged schematic diagram is provided in the utility model;

[0020] Figure 3 A main body structure front view schematic diagram of the IGBT press fitting mechanism of the floating support is provided in the utility model;

[0021] Figure 4 A partial structure bottom view schematic diagram of the IGBT press fitting mechanism of the floating support is provided in the utility model;

[0022] Figure 5 A main body structure side view schematic diagram of the IGBT press fitting mechanism of the floating support is provided in the utility model; Figure 4 A middle B area enlarged schematic diagram is provided in the utility model.

[0023] Legend:

[0024] 1, portal frame; 2, floating mechanism; 3, positioning tool; 4, jacking positioning mechanism; 5, servo press fitting mechanism; 6, push-pull cylinder; 7, guide column; 8, support plate; 9, rolling bearing; 10, servo cylinder; 11, balance cylinder; 12, guide rod; 13, pressure head guide sleeve; 14, butterfly spring; 15, pressure head body; 16, fixed plate; 17, snap pin. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] With reference to Figures 1-3 , the utility model provides an embodiment: a IGBT press fitting mechanism of floating support, including portal frame 1, the surface of portal frame 1 is provided with servo press fitting mechanism 5, and portal frame 1 provides installation support position to servo press fitting mechanism 5, and the bottom of servo press fitting mechanism 5 is provided with floating mechanism 2, and the bottom of portal frame 1 is provided with jacking positioning mechanism 4, and the top of jacking positioning mechanism 4 is provided with positioning tool 3, and IGBT is put into positioning tool 3 to provide positioning function.

[0027] With reference to Figures 3-5, the outer wall of the push-pull cylinder 6 is provided with a guide column 7, the outer wall of the guide column 7 is slidably connected with a support plate 8, the support plate 8 can lift the positioning tool 3 upwards, the surface of the support plate 8 is provided with a rolling bearing 9, the servo press fitting mechanism 5 comprises a servo cylinder 10, the outer wall of the servo cylinder 10 is provided with a balance cylinder 11, the output end of the balance cylinder 11 is fixedly connected with a fixed plate 16, the balance cylinder 11 is used to balance or offset the unbalanced force caused by gravity, friction or other external forces, keep the displacement of the fixed plate 16 stable, the top of the fixed plate 16 is fixedly connected with a guide rod 12, the guide rod 12 is used to guide the lifting of the fixed plate 16, the guide rod 12 is provided with two groups, and the two groups of guide rods 12 are symmetrically arranged with the central axis of the servo cylinder 10 as the axis of symmetry, the floating mechanism 2 comprises a pressure head guide sleeve 13, the surface of the pressure head guide sleeve 13 is provided with a snap pin 17, the inner wall of the pressure head guide sleeve 13 is slidably connected with a pressure head body 15, the bottom end of the pressure head guide sleeve 13 is fixedly connected with a butterfly spring 14, the butterfly spring 14 provides the required pre-tightening force for the pressure head body 15, and ensures that the pressure head body 15 has reliable contact and fixing force with the IGBT.

[0028] With reference to Figures 2-4 The inner surface of the support plate 8 is matched with the outer wall of the rolling bearing 9, the surface of the support plate 8 is provided with a through hole matched with the rolling bearing 9, the output end of the servo cylinder 10 is fixedly connected with the top of the fixed plate 16, the servo cylinder 10 is located at the center of the fixed plate 16, the servo cylinder 10 controls the lifting displacement of the fixed plate 16, the servo cylinder 10 is fixedly connected with the outer wall of the gantry 1 through a connecting plate, and the pressure head guide sleeve 13 is fixedly connected with the bottom of the fixed plate 16.

[0029] Working principle: the IGBT is put into the positioning tool 3, then the push-pull cylinder 6 pulls the rolling bearing 9 to move backward, the support plate 8 moves upward under the action of the rolling bearing 9, so as to support the positioning tool 3 to move upward to realize secondary positioning, after the IGBT is positioned, the servo press-fitting mechanism 5 fixed to the gantry 1 moves downward to realize press-fitting of the IGBT, in the process, the floating pressure head on the fixed plate 16 moves downward accurately under the action of the servo cylinder 10, in the displacement process of the fixed plate 16, the balance cylinder 11 and the guide rod 12 on both sides balance the pressure head body 15, so as to ensure that the pressure head body 15 is pressed stably, the pressure head body 15 can be stretched out and retracted in the pressure head guide sleeve 13, the middle is limited by the snap pin 17, the butterfly spring 14 outputs tension, before the pressure head body 15 contacts the IGBT, the pressure head body 15 is stretched out under the action of the butterfly spring 14, after contacting the IGBT, the butterfly spring 14 is compressed under the action force of the servo cylinder 10, the pressure head body 15 is retracted, after the press-fitting is completed, the servo press-fitting mechanism 5 is retracted, the pressure head body 15 is reset under the action force of the butterfly spring 14, so as to realize floating press-fitting of the IGBT through the above steps.

[0030] Finally, it should be pointed out that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model, should be contained in the protection scope of the utility model.

Claims

1. A floating supported IGBT press mechanism comprising a gantry (1), characterized in that: The surface of the portal frame (1) is provided with a servo press-fitting mechanism (5), the bottom of the servo press-fitting mechanism (5) is provided with a floating mechanism (2), the bottom of the portal frame (1) is provided with a jacking positioning mechanism (4), the top of the jacking positioning mechanism (4) is provided with a positioning tool (3), the jacking positioning mechanism (4) comprises a push-pull cylinder (6), the outer wall of the push-pull cylinder (6) is provided with a guide column (7), the outer wall of the guide column (7) is slidably connected with a support plate (8), the surface of the support plate (8) is provided with a rolling bearing (9), the servo press-fitting mechanism (5) comprises a servo cylinder (10), the outer wall of the servo cylinder (10) is provided with a balance cylinder (11), the output end of the balance cylinder (11) is fixedly connected with a fixed plate (16), the top of the fixed plate (16) is fixedly connected with a guide rod (12), the floating mechanism (2) comprises a pressure head guide sleeve (13), the surface of the pressure head guide sleeve (13) is provided with a snap pin (17), the inner wall of the pressure head guide sleeve (13) is slidably connected with a pressure head body (15), and the bottom end of the pressure head guide sleeve (13) is fixedly connected with a butterfly spring (14).

2. The floating supported IGBT press mechanism according to claim 1, wherein: The inner surface of the support plate (8) is matched with the outer wall of the rolling bearing (9).

3. The floating supported IGBT press mechanism according to claim 1, wherein: The output end of the servo cylinder (10) is fixedly connected with the top of the fixed plate (16), and the servo cylinder (10) is located at the center of the fixed plate (16).

4. The floating supported IGBT press mechanism according to claim 1, wherein: The servo cylinder (10) is fixedly connected with the outer wall of the portal frame (1) through the connecting plate.

5. The floating supported IGBT press mechanism according to claim 1, wherein: The pressure head guide sleeve (13) is fixedly connected with the bottom of the fixed plate (16).

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