External protection device for IGBT (Insulated Gate Bipolar Translator) module

Abstract

The utility model relates to the technical field of IGBT modules, and discloses an IGBT module external protection device, which enables two first side protection plates to move relatively by rotating a first bidirectional threaded rod, further realizes the contact between a contact assembly and an IGBT module body, and finally realizes the clamping of the IGBT module body. The IGBT module solves the problems that some existing IGBT modules are likely to collide and low in protection performance in the transportation process, the situation that the IGBT module bodies jolt along with vehicle jolting is avoided as much as possible, and therefore the safety of the IGBT module bodies is guaranteed, and the service life of the IGBT module bodies is prolonged. And meanwhile, the IGBT module body is sealed through the first side protection plate, the top protection plate, the second side protection plate and the bottom plate, so that the IGBT module body is prevented from being hit by external objects when the external objects fall off, and the safety of the IGBT module body is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of IGBT modules, in particular to an external protection device for an IGBT module. Background Art

[0002] IGBT is an insulated gate bipolar transistor, which is a composite fully controlled voltage-driven power semiconductor device composed of a bipolar triode and an insulated gate field effect transistor. It has the advantages of both the high input impedance of MOSFET and the low on-state voltage drop of GTR. IGBT circuit board generally refers to a board-level circuit product composed of IGBT driver chip, driver auxiliary power supply, driver peripheral circuit and connectors.

[0003] Some existing IGBT modules are usually placed in boxes for centralized transportation during transportation. Since there is no clamping device for the IGBT module inside the box, if the box shakes due to vehicle bumps, the IGBT device and the IGBT module inside the box may shake, and then the IGBT device and the box may collide. In severe cases, the pins of the IGBT device exposed outside the IGBT module inside the IGBT device may collide, causing economic losses. The protection of the IGBT module inside the IGBT device is low, and the safety and practicality are relatively low. In view of this, we propose an IGBT module external protection device to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies of the prior art, the utility model provides an IGBT module external protection device, which solves the problem that some existing IGBT modules may be bumped during transportation and have low protection.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an IGBT module external protection device, comprising a base plate, an IGBT module body is arranged on the upper side of the base plate, a first guide groove is opened on the upper surface of the base plate, a first bidirectional threaded rod is rotatably connected inside the first guide groove, a front end of the first bidirectional threaded rod rotates and penetrates the base plate, two first side protection plates are arranged on the upper side of the base plate, guide blocks are threadedly sleeved at two opposite threads of the first bidirectional threaded rod, the guide blocks are concave-shaped, the guide blocks are slidably connected to the first guide groove, a connecting block is arranged inside the groove on the surface of the guide block, and the upper surface of the connecting block extends The guide block is extended, the upper surface of the connecting block is fixedly connected to the lower surface of the first side protective plate, the groove on the upper surface of the guide block is rotatably connected with a rotating shaft, the left end of the rotating shaft rotates and passes through the guide block, the connecting block is fixedly sleeved on the outer surface of the rotating shaft, the inner wall of the first guide groove is provided with a through groove, the left end of the rotating shaft extends into the interior of the through groove, the outer surface of the rotating shaft is provided with a driving assembly, the inner wall of the first guide groove is provided with a receiving groove, the receiving groove and the connecting block are adapted, the opposite side surfaces of the two first side protective plates are fixedly connected with a top protective plate and two second side protective plates, and the opposite side surfaces of the two first side protective plates are provided with contact assemblies.

[0008] Preferably, second guide grooves are provided on opposite side surfaces of the two top protective plates, and second bidirectional threaded rods are rotatably connected inside the two second guide grooves, and the left ends of the two second bidirectional threaded rods are rotatably passed through the top protective plates.

[0009] Preferably, the two second side protection plates are respectively threadedly sleeved on two opposite threads of the second bidirectional threaded rod, and the second side protection plates are slidably connected to the second guide groove.

[0010] Preferably, a cavity is provided inside the bottom plate, the cavity is connected to the through groove, a limiting groove is provided on the bottom wall of the cavity, two limiting blocks are slidably connected inside the limiting groove, a rotating rod is rotatably connected inside the limiting groove, the front end of the rotating rod rotates and passes through the bottom plate, the two limiting blocks are slidably sleeved on the outer surface of the rotating rod, the interior of the limiting block is hollow, and the rotating shaft rotates and passes through the interior of the limiting block.

[0011] Preferably, the drive assembly includes a worm wheel, which is sleeved on the outer surface of the rotating shaft at one end inside the limit block, and the lower outer surface of the worm wheel is meshingly connected with a worm, and both ends of the worm are rotatably connected to the inner wall of the limit block.

[0012] Preferably, the sliding sleeve of the worm is arranged on the outer surface of the rotating rod, a groove is provided on the surface of the rotating rod, a block is fixedly connected to the inner wall of the worm, and the block and the groove are slidably connected.

[0013] Preferably, the contact assembly comprises a damper, the damper is fixedly connected to the first side protection plate, and one end of the damper away from the first side protection plate is fixedly connected to the contact plate.

[0014] Preferably, a spring is fixedly connected between the first side protection plate and the contact plate, and the spring is sleeved on the outside of the damper.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides an IGBT module external protection device, which has the following beneficial effects:

[0017] 1. The IGBT module external protection device rotates the first bidirectional threaded rod to make the two first side protection plates move relative to each other, thereby achieving contact between the contact assembly and the IGBT module body, and finally achieving clamping of the IGBT module body, thereby solving the problem that some existing IGBT modules may be bumped during transportation and have low protection, and avoids the situation where the IGBT module body is bumped with the vehicle as much as possible, thereby ensuring the safety of the IGBT module body. At the same time, the first side protection plate, the top protection plate, the second side protection plate and the bottom plate are used to close the IGBT module body, thereby avoiding the situation where external objects fall and hit the IGBT module body, so that the safety of the IGBT module body is further improved.

[0018] 2. The IGBT module external protection device, by rotating the rotating rod, will put the IGBT module body in an unprotected state, further improving the practicality of the device, making it convenient for the staff to place the IGBT module body into the upper side of the base plate, and also convenient to take the IGBT module body out from the inside of the external protection device, with simple operation. At the same time, the self-locking property of the worm gear and the worm also ensures the stability of the first side protection plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of an external protection device for an IGBT module of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the bottom plate of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the first guide groove of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the first side protection plate of the utility model;

[0023] Figure 5 It is a schematic cross-sectional structure diagram of the limit block of the utility model;

[0024] Figure 6 It is a schematic diagram of the structure of the cavity of the utility model;

[0025] Figure 7 It is a structural schematic diagram of the contact plate of the utility model.

[0026] In the figure: 1. bottom plate; 2. IGBT module body; 3. first guide groove; 4. first bidirectional threaded rod; 5. first side protection plate; 6. guide block; 7. connecting block; 8. rotating shaft; 9. through groove; 10. accommodating groove; 11. top protection plate; 12. second side protection plate; 13. second guide groove; 14. second bidirectional threaded rod; 15. worm gear; 16. worm; 17. cavity; 18. limit groove; 19. limit block; 20. rotating rod; 21. slot; 22. block; 23. contact plate; 24. damper; 25. spring. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1-Figure 7The utility model provides a technical solution: an IGBT module external protection device, comprising a base plate 1, an IGBT module body 2 is arranged on the upper side of the base plate 1, a first guide groove 3 is opened on the upper surface of the base plate 1, a first bidirectional threaded rod 4 is rotatably connected inside the first guide groove 3, the front end of the first bidirectional threaded rod 4 rotates through the base plate 1, two first side protection plates 5 are arranged on the upper side of the base plate 1, two opposite threads of the first bidirectional threaded rod 4 are threadedly sleeved with guide blocks 6, the guide blocks 6 are concave-shaped, the guide blocks 6 and the first guide groove 3 are slidably connected, a connecting block 7 is arranged inside the groove on the surface of the guide block 6, and the upper surface of the connecting block 7 extends out The guide block 6 and the upper surface of the connecting block 7 are fixedly connected to the lower surface of the first side protective plate 5. The groove on the upper surface of the guide block 6 is rotatably connected with a rotating shaft 8. The left end of the rotating shaft 8 rotates and penetrates the guide block 6. The connecting block 7 is fixedly sleeved on the outer surface of the rotating shaft 8. The inner wall of the first guide groove 3 is provided with a through groove 9. The left end of the rotating shaft 8 extends into the interior of the through groove 9. The outer surface of the rotating shaft 8 is provided with a driving assembly. The inner wall of the first guide groove 3 is provided with a receiving groove 10. The receiving groove 10 is adapted to the connecting block 7. The opposite side surfaces of the two first side protective plates 5 are fixedly connected with a top protective plate 11 and two second side protective plates 12. The opposite side of the two first side protective plates 5 The surfaces are provided with contact components, and the two guide blocks 6 are driven to slide inside the first guide groove 3 by rotating the first bidirectional threaded rod 4, so that the rotating shaft 8 moves synchronously inside the through groove 9. At the same time, the movement of the rotating shaft 8 will synchronously drive the movement of the connecting block 7, and then drive the movement of the first side protection plate 5. The subsequent contact components will be connected with the IGBT module body 2, and at this time, the first side protection plate 5, the top protection plate 11, the second side protection plate 12 and the bottom plate 1 will form a closed space, and finally realize the protection of the outside of the IGBT module body 2. The above structure solves the problem that some existing IGBT modules may be bumped during transportation, and the protection is relatively good. The problem of low load is solved by rotating the first bidirectional threaded rod 4 to make the two first side protection plates 5 move relative to each other, thereby realizing the contact between the contact assembly and the IGBT module body 2, and finally realizing the clamping of the IGBT module body 2, thereby avoiding as much as possible the situation that the IGBT module body 2 is bumped along with the bumps of the vehicle, thereby ensuring the safety of the IGBT module body 2. At the same time, the first side protection plate 5, the top protection plate 11, the second side protection plate 12 and the bottom plate 1 close the IGBT module body 2, thereby avoiding the situation that external objects fall and hit the IGBT module body 2, thereby further improving the safety of the IGBT module body 2.

[0029] Furthermore, second guide grooves 13 are provided on the surfaces of the opposite sides of the two top protective plates 11, and second bidirectional threaded rods 14 are rotatably connected inside the two second guide grooves 13. The left ends of the two second bidirectional threaded rods 14 are rotatably passed through the top protective plate 11, and the two second side protective plates 12 are respectively threadedly sleeved on the two opposite threads of the second bidirectional threaded rods 14. The second side protective plates 12 are slidably connected to the second guide grooves 13, and the two second side protective plates 12 are driven to move inside the second guide grooves 13 by rotating the second bidirectional threaded rods 14, so as to finally achieve the clamping of one side of the IGBT module body 2 by the second side protective plate 12, so that the second side protective plate 12 further restricts the IGBT module body 2, and the stability of the device on the upper side of the base plate 1 is further improved by the above structure, and the shaking of the IGBT module body 2 is further restricted by the joint clamping on the left and right sides.

[0030] In the above embodiment, a contact component may also be provided on the surface of one side opposite to the two second side protection plates 14 , so that the contact component can be in contact with both sides of the IGBT module body 2 , thereby ensuring its stability.

[0031] Furthermore, a cavity 17 is provided inside the bottom plate 1, and the cavity 17 is connected to the through groove 9. A limit groove 18 is provided on the bottom wall of the cavity 17. Two limit blocks 19 are slidably connected inside the limit groove 18. A rotating rod 20 is rotatably connected inside the limit groove 18. The front end of the rotating rod 20 rotates and passes through the bottom plate 1. The two limit blocks 19 are slidably sleeved on the outer surface of the rotating rod 20. The interior of the limit block 19 is hollow, and the rotating shaft 8 rotates and passes into the interior of the limit block 19.

[0032] Furthermore, the driving assembly includes a worm wheel 15, which is sleeved on the outer surface of the rotating shaft 8 at one end inside the limit block 19, and a worm 16 is meshedly connected to the lower outer surface of the worm wheel 15. The worm 16 meshed on the surfaces of the two worm wheels 15 are mirror-imaged, and the purpose is that when the two worms 16 rotate in the same direction, the two worm wheels 15 can rotate in the opposite direction. Both ends of the worm 16 are rotatably connected to the inner wall of the limit block 19, and the sliding sleeve of the worm 16 is arranged on the outer surface of the rotating rod 20. The rotating rod 20 A slot 21 is provided on the surface, and a block 22 is fixedly connected to the inner wall of the worm 16. The block 22 and the slot 21 are slidably connected. When the first bidirectional threaded rod 4 is rotated to move the first side protection plate 5, the rotation shaft 8 slides inside the through slot 9 to drive the limit block 19 to slide inside the limit slot 18, so that the limit block 19 will slide on the outer surface of the rotating rod 20. At this time, the worm 16 will slide on the surface of the rotating rod 20 synchronously, and the block 22 will slide inside the slot 21. In order to facilitate the staff to take the IGBT module body 2, the staff first rotates the rotating rod 20. Since the clamping block 22 and the clamping slot 21 are slidably connected, the rotation of the rotating rod 20 will drive the rotation of the worm 16, and the rotation of the worm 16 will drive the rotation of the worm wheel 15, and the rotation of the worm wheel 15 will drive the selection of the rotating shaft 8, and then drive the connecting block 7 and the first side protective plate 5 to rotate. Subsequently, the two connecting blocks 7 will fall to both sides. At this time, the connecting block 7 will be stuck in the inside of the accommodating groove 10, thereby avoiding the situation where the surface of the bottom plate 1 blocks the connecting block 7. At this time, the IGBT module body 2 will be in an unprotected state. The practicality of the device is further improved by the above structure, which is convenient for the staff to put the IGBT module body 2 into the upper side of the bottom plate 1, and also convenient for taking the IGBT module body 2 out from the inside of the external protective device. The operation is simple, and the stability of the first side protective plate 5 is also guaranteed by the self-locking property of the worm wheel 15 and the worm 16.

[0033] Furthermore, the contact assembly includes a damper 24, which is fixedly connected to the first side protective plate 5. The end of the damper 24 away from the first side protective plate 5 is fixedly connected to a contact plate 23. The contact plate 23 can be a flexible contact plate, a cushion or a shock-absorbing rubber. A spring 25 is fixedly connected between the first side protective plate 5 and the contact plate 23. The spring 25 is sleeved on the outside of the damper 24. Through the arrangement of the contact plate, the damper 24 and the spring 25, the elastic deformation converts the vibration force into elastic potential energy, thereby achieving a buffering effect and improving the protection performance of the IGBT module body 2.

[0034] Working principle:

[0035] When the IGBT module external protection device is in use, the first bidirectional threaded rod 4 is rotated to drive the two guide blocks 6 to slide inside the first guide groove 3, so that the rotating shaft 8 moves synchronously inside the through groove 9. At the same time, the movement of the rotating shaft 8 will synchronously drive the movement of the connecting block 7, and then drive the movement of the first side protection plate 5. The subsequent contact component will be with the IGBT module body 2, and at this time, the first side protection plate 5, the top protection plate 11, the second side protection plate 12 and the bottom plate 1 will form a closed space, ultimately realizing the protection of the outside of the IGBT module body 2.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An IGBT module external protection device, comprising a base plate (1), characterized in that: An IGBT module body (2) is arranged on the upper side of the base plate (1), a first guide groove (3) is provided on the upper surface of the base plate (1), a first bidirectional threaded rod (4) is rotatably connected inside the first guide groove (3), a front end of the first bidirectional threaded rod (4) rotatably penetrates the base plate (1), two first side protection plates (5) are arranged on the upper side of the base plate (1), guide blocks (6) are threadedly sleeved on two opposite threads of the first bidirectional threaded rod (4), the guide block (6) is concave-shaped, the guide block (6) and the first guide groove (3) are slidably connected, a connecting block (7) is arranged inside the groove on the surface of the guide block (6), the guide block (6) is extended from the upper surface of the connecting block (7), and the upper surface of the connecting block (7) and the first side protection plate (5) are connected. The first guide groove (3) is fixedly connected to the lower surface of the guide block (6); a rotating shaft (8) is rotatably connected inside the groove on the upper surface of the guide block (6); the left end of the rotating shaft (8) rotates through the guide block (6); the connecting block (7) is fixedly sleeved on the outer surface of the rotating shaft (8); the inner wall of the first guide groove (3) is provided with a through groove (9); the left end of the rotating shaft (8) extends into the inside of the through groove (9); the outer surface of the rotating shaft (8) is provided with a driving component; the inner wall of the first guide groove (3) is provided with a receiving groove (10); the receiving groove (10) and the connecting block (7) are adapted; the opposite side surfaces of the two first side protective plates (5) are fixedly connected with a top protective plate (11) and two second side protective plates (12); the opposite side surfaces of the two first side protective plates (5) are provided with a contact component.

2. An IGBT module external protection device according to claim 1, characterized in that: A second guide groove (13) is provided on the opposite side surfaces of the two top protective plates (11), and the insides of the two second guide grooves (13) are rotatably connected with second bidirectional threaded rods (14), and the left ends of the two second bidirectional threaded rods (14) are rotatably passed through the top protective plates (11).

3. An IGBT module external protection device according to claim 2, characterized in that: The two second side protection plates (12) are respectively threadedly sleeved on two opposite threads of the second bidirectional threaded rod (14), and the second side protection plates (12) are slidably connected to the second guide groove (13).

4. The IGBT module external protection device according to claim 1, characterized in that: The bottom plate (1) is provided with a cavity (17) inside, the cavity (17) and the through groove (9) are connected, the bottom wall of the cavity (17) is provided with a limit groove (18), the inside of the limit groove (18) is slidably connected with two limit blocks (19), the inside of the limit groove (18) is rotatably connected with a rotating rod (20), the front end of the rotating rod (20) rotates to pass through the bottom plate (1), the two limit blocks (19) are slidably sleeved on the outer surface of the rotating rod (20), the inside of the limit block (19) is hollow, and the rotating shaft (8) rotates to pass through the inside of the limit block (19).

5. An IGBT module external protection device according to claim 4, characterized in that: The driving assembly comprises a worm wheel (15), which is sleeved on the outer surface of the rotating shaft (8) at one end inside the limit block (19), and a worm (16) is meshingly connected to the lower outer surface of the worm wheel (15), and both ends of the worm (16) are rotatably connected to the inner wall of the limit block (19).

6. An IGBT module external protection device according to claim 5, characterized in that: The worm (16) is slidably sleeved on the outer surface of the rotating rod (20), a clamping groove (21) is provided on the surface of the rotating rod (20), a clamping block (22) is fixedly connected to the inner wall of the worm (16), and the clamping block (22) and the clamping groove (21) are slidably connected.

7. An IGBT module external protection device according to claim 1, characterized in that: The contact assembly comprises a damper (24), the damper (24) is fixedly connected to the first side protection plate (5), and one end of the damper (24) away from the first side protection plate (5) is fixedly connected to a contact plate (23).

8. An IGBT module external protection device according to claim 7, characterized in that: A spring (25) is fixedly connected between the first side protection plate (5) and the contact plate (23), and the spring (25) is sleeved on the outside of the damper (24).

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