Pin needle for IGBT (Insulated Gate Bipolar Translator) module

Abstract

The utility model discloses a Pin needle for an IGBT module, which comprises a Pin needle body, an S-shaped buffer part fixed at the bottom of the Pin needle body and a base fixed at the bottom of the S-shaped buffer part, the left side of the top of the base is fixedly connected with a rectangular clamping block, and a reinforced compensation type buffer supporting mechanism is clamped on the rectangular clamping block in a magnetic attraction manner. By arranging a series of structures, buffering force and resetting force can be conveniently provided when the S-shaped buffering part is in elastic fatigue, the elastic force is weakened, and effective resetting cannot be achieved, the buffering force of the elastic support can be flexibly adjusted according to using requirements, different elastic support buffering requirements can be conveniently and flexibly met, and the applicability is improved; and the stable elastic supporting buffering and rebounding using state can be continuously kept when no Pin body of the same specification exists on site, the long-acting using stability is improved, the reinforced compensation type slow supporting mechanism can be independently disassembled, assembled and recycled conveniently when the subsequent Pin body is damaged and replaced, and the practicability of the reinforced compensation type slow supporting mechanism is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of IGBT modules, in particular to a Pin used for an IGBT module. Background Art

[0002] IGBT modules have the characteristics of large input impedance, small driving power, simple control circuit, small switching loss, fast on-off speed, and high operating frequency. Therefore, they are widely used in rail transportation, new energy and other fields. At present, during the testing and application of IGBT modules, the terminals (pins) of IGBT modules are easily subjected to external stress and transmitted to the welding interface between the pier and the liner, resulting in fracture of the pier welding interface.

[0003] To solve this problem, a search by a novelty search agency revealed that announcement number CN213546593U discloses an IGBT module signal terminal, comprising a Pin pin body, the Pin pin body being provided with a shoulder, a stress buffer, a limit portion and a base, the shoulder being provided at one end of the Pin pin body, one end of the stress buffer being connected to the shoulder, and the other end being connected to the base, the stress buffer being retractable along an extension direction of the Pin pin body, a height of the limit portion along the extension direction of the Pin pin body being less than a height of the stress buffer portion, two limit portions being provided on both sides of the stress buffer portion, one end of the limit portion being connected to the shoulder, and the other end being suspended above the base; the IGBT module signal terminal provided thereby can simplify the operating procedure, has a long service life and high reliability.

[0004] The above technology discloses an IGBT module signal terminal, which has a C-shaped or S-shaped stress buffer portion at the bottom of the Pin pin body. When the Pin pin is subjected to extrusion stress during module testing and application, the stress buffer portion can be compressed to achieve a buffering and unloading effect. The stress buffer portion can withstand a certain longitudinal stress while ensuring rigidity. However, the following deficiencies still exist: 1. (The stress buffer portion will inevitably suffer from elastic fatigue and weakening of elastic force with long-term use, resulting in the inability to effectively drive the Pin pin to reset after buffering, causing poor contact), and when there is no Pin pin of the same specification for disassembly and replacement on site, the stable elastic support buffering and rebound use state cannot be maintained, and the long-term use stability is not ideal; improvement is needed. In view of this, the present application proposes a Pin pin for an IGBT module to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a Pin for an IGBT module to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a Pin pin for an IGBT module, comprising a Pin pin body, an S-shaped buffer portion fixed at the bottom of the Pin pin body, and a base fixed at the bottom of the S-shaped buffer portion, a rectangular card block is fixedly connected to the top left side of the base, and a reinforced compensating buffer support mechanism is installed on the rectangular card block. During the test and application of the IGBT module, the Pin pin body will shrink and compress the S-shaped buffer portion when subjected to the extrusion stress during the test, and the elastic contraction of the S-shaped buffer portion is used to realize the buffering and unloading of the Pin pin body, and the rebound of the S-shaped buffer portion is used to realize the rebound reset of the Pin pin body after extrusion;

[0007] The reinforced compensating buffer mechanism includes a rectangular tube magnetically mounted on a rectangular clamping block, the bottom end of the rectangular tube is arranged as a blocking structure, a sliding sleeve inside the rectangular tube is provided with an elastic support assembly, the top of the elastic support assembly is in active contact with the inner top of the S-shaped buffer portion, a rectangular through-hole is provided at the bottom left side of the rectangular tube, a threaded pressure regulating assembly is installed between the bottom inner wall of the rectangular tube and the bottom end of the elastic support assembly, the bottom of the threaded pressure regulating assembly extends into the rectangular through-hole and is fixedly connected with a knob, both sides of the knob extend outside the rectangular tube, the elastic support assembly is used to strengthen the elastic force of the S-shaped buffer portion, and to provide buffering force and resetting force when the elastic fatigue elastic force of the S-shaped buffer portion becomes weak and cannot be effectively reset, and the threaded pressure regulating assembly is used to adjust the elastic force of the elastic support assembly so as to flexibly adapt to different elastic support buffering requirements.

[0008] Preferably, the elastic support assembly includes a rectangular rod slidably sleeved in a rectangular tube, a buffer spring is installed at the bottom end of the rectangular rod, a support block is fixedly connected to the top of the rectangular rod, an insulating rubber is bonded and fixed to the top of the support block, and the top of the insulating rubber is in movably contact with the inner top of the S-shaped buffer portion.

[0009] Preferably, the threaded pressure regulating assembly includes a screw rod rotatably mounted on the inner wall of the bottom end of a rectangular tube, a rectangular slider is provided in a sliding sleeve inside the rectangular tube, the rectangular slider is threadedly sleeved on the screw rod, the top of the rectangular slider is fixedly connected to the bottom end of the buffer spring, and the bottom end of the screw rod extends into the rectangular through hole and is fixedly connected to the top of the knob.

[0010] Preferably, a rectangular slot is provided at the bottom of the rectangular tube, the rectangular slot is movably sleeved on the rectangular block, the top inner wall of the rectangular slot and the top of the rectangular block are both embedded and fixed with magnet blocks, and the adjacent sides of the two magnet blocks are adsorbed.

[0011] Preferably, a limiting groove is provided on the right side of the rectangular rod, and a limiting block slidably connected to the limiting groove is fixedly connected to the right inner wall of the rectangular tube.

[0012] Preferably, a thread groove which is threadably connected to the screw rod is formed at the bottom of the rectangular sliding block.

[0013] Preferably, the rectangular block is made of insulating hard plastic material.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. This Pin needle for IGBT module can provide buffering force and reset force when the elastic fatigue elastic force of the S-shaped buffer part weakens and cannot be reset effectively through the cooperation of the rectangular tube and the elastic support assembly, so that it can continue to be used;

[0016] 2. The Pin needle for the IGBT module can flexibly adjust the spring support buffering force according to the use requirements through the cooperation of the set rectangular tube, spring support assembly, threaded pressure regulating assembly and knob, and is convenient and flexible to adapt to different spring support buffering requirements, avoiding the phenomenon that the spring force is too large to buffer or the spring force is too small to effectively support the reset, thereby improving the applicability. In addition, by using the method of adding spring support and adjustable force separately, the Pin needle body of the same specification can continue to maintain a stable spring support buffering and rebound use state when it is not disassembled and replaced on site, so that it can continue to be used stably without disassembly and replacement, thereby improving the long-term use stability;

[0017] 3. The Pin needle for the IGBT module can be disassembled by simply pulling the rectangular tube, magnet block, rectangular slot and rectangular block through the cooperation of the provided rectangular tube, so as to facilitate the separate disassembly and recycling of the reinforced compensating buffer support mechanism when the Pin needle body is damaged and replaced later, thereby improving the practicality of the reinforced compensating buffer support mechanism.

[0018] The utility model is provided with a series of structures, which is convenient for providing buffering force and resetting force when the elastic fatigue force of the S-shaped buffer part becomes weak and cannot be effectively reset, and is convenient for flexibly adjusting the elastic support buffering force according to use requirements, convenient and flexibly adapting to different elastic support buffering requirements, improving applicability, and can also maintain stable elastic support buffering and rebound use status when there is no Pin needle body of the same specification for disassembly and replacement on site, thereby improving long-term use stability, and is convenient for separate disassembly and recycling of the reinforced compensating buffer support mechanism when the Pin needle body is damaged and replaced later, thereby improving the practicality of the reinforced compensating buffer support mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a Pin for an IGBT module proposed by the utility model;

[0020] Figure 2 It is a right view structural schematic diagram of a Pin body, an S-shaped buffer portion, a base and a support block connector of a Pin pin for an IGBT module proposed by the utility model;

[0021] Figure 3 for Figure 1The A part in the figure is an enlarged cross-sectional structural diagram.

[0022] In the figure: 1, Pin body; 101, S-shaped buffer part; 102, base; 103, rectangular clamping block; 2, rectangular tube; 3, buffer spring; 4, rectangular rod; 5, support block; 6, rectangular slider; 7, screw; 8, knob; 9, rectangular slot; 10, magnet block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figures 1 to 3 As shown, the present embodiment proposes a Pin needle for an IGBT module, comprising a Pin needle body 1, an S-shaped buffer portion 101 fixed at the bottom of the Pin needle body 1, and a base 102 fixed at the bottom of the S-shaped buffer portion 101, a rectangular clamping block 103 is fixedly connected to the top left side of the base 102, a reinforced compensating buffer mechanism is magnetically mounted on the rectangular clamping block 103, and the rectangular clamping block 103 is made of insulating hard plastic material. During the IGBT module test and application process, the Pin needle body 1 will shrink and compress the S-shaped buffer portion 101 when subjected to the extrusion stress during the test, and the elastic contraction of the S-shaped buffer portion 101 is used to realize buffering and unloading of the Pin needle body 1, and the rebound of the S-shaped buffer portion 101 is used to realize the rebound reset of the Pin needle body 1 after extrusion;

[0025] The reinforced compensating buffer mechanism includes a rectangular tube 2 magnetically mounted on a rectangular block 103, the bottom end of the rectangular tube 2 is set as a blocking structure, the sliding sleeve inside the rectangular tube 2 is provided with an elastic support assembly, the top of the elastic support assembly is in active contact with the inner top of the S-shaped buffer portion 101, a rectangular through hole is opened at the bottom left side of the rectangular tube 2, a threaded pressure regulating assembly is installed between the bottom inner wall of the rectangular tube 2 and the bottom end of the elastic support assembly, the bottom of the threaded pressure regulating assembly extends into the rectangular through hole and is fixedly connected with a knob 8, both sides of the knob 8 extend to the outside of the rectangular tube 2, the elastic support assembly is used to strengthen the elastic force of the S-shaped buffer portion 101, and provide buffering force and resetting force when the elastic fatigue elastic force of the S-shaped buffer portion 101 becomes weak and cannot be effectively reset, and the threaded pressure regulating assembly is used to adjust the elastic force of the elastic support assembly so as to flexibly adapt to different elastic support buffering requirements.

[0026] Specifically, the elastic support assembly includes a rectangular rod 4 slidably sleeved in the rectangular tube 2, wherein a limiting groove is provided on the right side of the rectangular rod 4, and a limiting block slidably connected to the limiting groove is fixedly connected to the right inner wall of the rectangular tube 2, which plays a role in limiting and preventing the rectangular rod 4 from falling off, and a buffer spring 3 is installed at the bottom end of the rectangular rod 4, and a support block 5 is fixedly connected to the top of the rectangular rod 4. An insulating rubber is bonded and fixed to the top of the support block 5, and the top of the insulating rubber is movably contacted with the inner top of the S-shaped buffer portion 101; the rectangular rod 4, the buffer spring 3, the support block 5 and the insulating rubber are arranged to cooperate, and the buffer spring 3 is used to elastically support the support block 5 through the rectangular rod 4 When the S-shaped buffer portion 101 contracts, the support block 5 will be driven to move downward, and the support block 5 will drive the rectangular rod 4 to compress the buffer spring 3 downward, and the elastic force of the buffer spring 3 will be used to strengthen the elastic force of the S-shaped buffer portion 101, and to provide buffering force and resetting force when the elastic fatigue force of the S-shaped buffer portion 101 weakens and cannot be effectively reset. This can ensure that the S-shaped buffer portion 101 can continue to be used after elastic fatigue failure, avoid poor contact during testing or application due to the inability to effectively reset the Pin needle body 1, and continue to use it stably and for a long time when there is no Pin needle body 1 of the same specification on site for disassembly and replacement.

[0027] Furthermore, the threaded pressure regulating assembly includes a screw 7 rotatably mounted on the inner wall of the bottom end of the rectangular tube 2, wherein a circular through-hole connected to the rectangular through-hole is provided on the inner wall of the bottom end of the rectangular tube 2, a bearing is provided in a fixed sleeve in the circular through-hole, and the inner side of the inner ring of the bearing is fixedly connected to the outer side of the screw 7, which plays the effect of rotatably mounting the screw 7, and a rectangular slider 6 is provided in a sliding sleeve in the rectangular tube 2, and the rectangular slider 6 is threadedly sleeved on the screw 7, wherein a thread groove threadably connected to the screw 7 is provided at the bottom of the rectangular slider 6, and the threaded connection relationship between the screw 7 and the thread groove is utilized to facilitate driving the rectangular slider 6 up and down when the screw 7 rotates. The top of the rectangular slider 6 is fixedly connected to the bottom end of the buffer spring 3, and the bottom end of the screw rod 7 extends into the rectangular through-hole and is fixedly connected to the top of the knob 8. The screw rod 7 and the rectangular slider 6 cooperate with each other, and the screw rod 7 is driven to rotate by turning the knob 8. The rotation of the screw rod 7 drives the rectangular slider 6 to move up and down, thereby compressing the buffer spring 3 upward or releasing it downward, which can change the compression degree of the buffer spring 3, thereby changing its elastic support buffering force, which is convenient and flexible to adapt to different elastic support buffering requirements, avoids the phenomenon that the buffering cannot be achieved due to the large elastic force or the elastic force is small and cannot effectively support the reset, and improves the applicability.

[0028] Furthermore, a rectangular slot 9 is provided at the bottom of the rectangular tube 2, and the rectangular slot 9 is movably sleeved on the rectangular block 103. The top inner wall of the rectangular slot 9 and the top of the rectangular block 103 are both embedded and fixed with magnet blocks 10. The two magnet blocks 10 are adsorbed on their adjacent sides. The arranged magnet blocks 10, the rectangular slot 9 and the rectangular block 103 cooperate to achieve the effect of convenient magnetic fixing of the rectangular tube 2. The magnetic fixing method is used to facilitate personnel to disassemble and assemble the rectangular tube 2, so as to facilitate the recycling of the reinforced compensatory buffer mechanism when the Pin needle body 1 is damaged and replaced, thereby improving the practicality of the reinforced compensatory buffer mechanism.

[0029] The method of using this embodiment is as follows: during the IGBT module test and application process, the Pin body 1 will shrink and compress the S-shaped buffer portion 101 when subjected to the extrusion stress during the test, and the elastic contraction of the S-shaped buffer portion 101 is used to achieve buffering and unloading of the Pin body 1, and the rebound of the S-shaped buffer portion 101 is used to achieve the rebound reset of the Pin body 1 after extrusion, and the risk of the Pin body 1 being bent and damaged by the longitudinal rigid extrusion stress is reduced by the buffering method;

[0030] When the S-shaped buffer 101 contracts, the support block 5 will be driven to move downward, and the support block 5 will drive the rectangular rod 4 to compress the buffer spring 3 downward, and the elastic force of the buffer spring 3 will be used to strengthen the elastic force of the S-shaped buffer 101, and provide buffering force and resetting force when the elastic fatigue elastic force of the S-shaped buffer 101 becomes weak and cannot be effectively reset, so that the S-shaped buffer 101 can continue to be used after elastic fatigue failure, avoiding the phenomenon of poor contact during testing or application due to the inability to effectively reset the Pin needle body 1, and maintaining a stable elastic support buffer and rebound use state when there is no Pin needle body 1 of the same specification for disassembly and replacement on site, thereby improving long-term use stability;

[0031] When the elastic support buffering force needs to be adjusted, the personnel can rotate the knob 8 to drive the screw 7 to rotate. The rotation of the screw 7 drives the rectangular slider 6 to slide upward or downward in the rectangular tube 2, and compresses the buffer spring 3 upward or releases it downward, which can change the compression degree of the buffer spring 3, thereby changing its elastic support buffering force, conveniently and flexibly adapting to different elastic support buffering requirements, avoiding the phenomenon that the buffering cannot be achieved due to the large elastic force or the elastic force cannot effectively support the reset due to the small elastic force, and improving the applicability;

[0032] In addition, by cooperating with the set magnet block 10, the rectangular card slot 9 and the rectangular card block 103, the rectangular tube 2 is conveniently magnetically fixed. When the Pin needle body 1 is damaged and replaced later, the rectangular tube 2 can be separated from the rectangular card slot 9 by pulling upwards, and the upper magnet block 10 is driven to separate from the lower magnet block 10, so that the rectangular tube 2 can be disassembled and assembled quickly and conveniently, thereby facilitating and quickly disassembling and assembling the reinforced compensating buffer mechanism, so that when the Pin needle body 1 is damaged and replaced later, the reinforced compensating buffer mechanism can be disassembled and assembled separately for recycling, thereby improving the practicality of the reinforced compensating buffer mechanism.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pin for an IGBT module, comprising a pin body (1), an S-shaped buffer portion (101) fixed at the bottom of the pin body (1), and a base (102) fixed at the bottom of the S-shaped buffer portion (101), characterized in that: A rectangular clamping block (103) is fixedly connected to the left side of the top of the base (102), and a magnetic card on the rectangular clamping block (103) is provided with a reinforced compensating buffer mechanism; The reinforced compensating buffer mechanism comprises a rectangular tube (2) magnetically mounted on a rectangular clamping block (103); the bottom end of the rectangular tube (2) is arranged as a blocking structure; a sliding sleeve inside the rectangular tube (2) is provided with an elastic support assembly; the top of the elastic support assembly is in active contact with the inner top of the S-shaped buffer portion (101); a rectangular through hole is provided at the left bottom of the rectangular tube (2); a threaded pressure regulating assembly is installed between the bottom inner wall of the rectangular tube (2) and the bottom end of the elastic support assembly; the bottom of the threaded pressure regulating assembly extends into the rectangular through hole and is fixedly connected to a knob (8); both sides of the knob (8) extend outside the rectangular tube (2).

2. A Pin for an IGBT module according to claim 1, characterized in that: The elastic support assembly comprises a rectangular rod (4) slidably sleeved in a rectangular tube (2), a buffer spring (3) being installed at the bottom end of the rectangular rod (4), a support block (5) being fixedly connected to the top end of the rectangular rod (4), an insulating rubber being bonded and fixed to the top of the support block (5), and the top of the insulating rubber being in active contact with the inner top of the S-shaped buffer portion (101).

3. A Pin for an IGBT module according to claim 2, characterized in that: The threaded pressure regulating assembly comprises a screw rod (7) rotatably mounted on the inner wall of the bottom end of the rectangular tube (2); a rectangular slider (6) is slidably sleeved inside the rectangular tube (2); the rectangular slider (6) is threadedly sleeved on the screw rod (7); the top of the rectangular slider (6) is fixedly connected to the bottom end of the buffer spring (3); the bottom end of the screw rod (7) extends into the rectangular through hole and is fixedly connected to the top of the knob (8).

4. The pin for an IGBT module according to claim 1, characterized in that: A rectangular slot (9) is provided at the bottom of the rectangular tube (2), and the rectangular slot (9) is movably clamped on the rectangular clamping block (103). Magnet blocks (10) are embedded and fixed on the top inner wall of the rectangular slot (9) and the top of the rectangular clamping block (103), and the adjacent sides of the two magnet blocks (10) are attracted to each other.

5. The pin for an IGBT module according to claim 2, characterized in that: A limiting groove is provided on the right side of the rectangular rod (4), and a limiting block slidably connected to the limiting groove is fixedly connected to the right inner wall of the rectangular tube (2).

6. The pin for an IGBT module according to claim 3, characterized in that: The bottom of the rectangular sliding block (6) is provided with a thread groove which is threadably connected to the screw rod (7).

7. The pin for an IGBT module according to claim 1, characterized in that: The rectangular card block (103) is made of insulating hard plastic material.

Images