Thyristor pressing device

Abstract

The present invention discloses a thyristor press-fitting device, which relates to the technical field of thyristor equipment, and includes a press-fitting unit, including a mounting assembly, an adjustment assembly installed inside the mounting assembly, and a press-fitting assembly arranged at the bottom of the adjustment assembly. The beneficial effect of the present invention is that the disc spring cooperates with the adjustment bent plate, so that the adjustment of the press-fitting force is more flexible and accurate. Different types of thyristors can obtain the best press-fitting force by simply adjusting the stiffness and compression of the disc spring, ensuring that the thyristor is always in the best press-fitting force state during operation. The press-fitting force of the thyristor can be accurately controlled through the scale indication on the outside of the top cover and the deformation of the disc spring. The correct press-fitting force effectively improves the heat dissipation performance of the thyristor, prevents heat accumulation caused by excessive or too low press-fitting force, and reduces the mechanical stress on the silicon wafer under working conditions with frequent thermal cycles, thereby increasing the service life of the thyristor, avoiding the wear of the cathode strip coating, and preventing the occurrence of short-circuit faults.

Description

Technical Field

[0001] The invention relates to the technical field of thyristor equipment, in particular to a thyristor pressing device. Background Art

[0002] As a high-power driving device in the control system, thyristor has the advantages of small size, high efficiency and long life, and has been widely used in AC and DC motor speed control systems, power control systems and follow-up systems.

[0003] When the thyristor is working normally, a certain pressing force must be applied at both ends, and the magnitude of the pressing force must be continuously and permanently maintained within a certain range to ensure that the heat generated by the device due to power consumption can be transferred away. If the pressing force is too low, the contact thermal resistance and contact resistance will increase, and the poor contact of some cathode strips may cause the on-state voltage drop to increase and the allowable on-state current to decrease, which may cause the performance of the component to be degraded or even damaged under high current conditions. If the pressing force exceeds the maximum specified value, the mechanical stress on the silicon wafer will increase, especially under frequent thermal cycle working conditions, which will not only greatly reduce the service life of the device, but also may wear the cathode strip coating, thereby causing a short circuit fault. Therefore, when installing the thyristor, the size of the pressing force is very critical. The correct pressing force can effectively ensure the safety and stability of the thyristor, and at the same time improve the heat dissipation performance of the thyristor. At present, the common thyristor press-fitting structures on the market are mostly complex, which is not conducive to the convenience of production and maintenance. Summary of the invention

[0004] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a thyristor press-assembly device, which can effectively solve the cumbersome problems and defects of thyristor press-assembly.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a thyristor press-fitting device, comprising a press-fitting unit, including a mounting assembly, an adjusting assembly mounted inside the mounting assembly, and a press-fitting assembly arranged at the bottom of the adjusting assembly;

[0007] The mounting assembly includes a mounting top cover, a mounting groove arranged at the bottom of the mounting top cover, two sets of mounting holes symmetrically arranged at both ends of the mounting top cover, a mounting plate arranged at the bottom of the mounting top cover, and a bolt threadedly connected to the top of the mounting plate;

[0008] The adjustment assembly includes a limit plate, a press rod fixedly connected to the bottom of the limit plate, a press plate arranged at the bottom of the press rod, a disc spring arranged at the bottom of the limit plate, and an adjustment bent plate arranged at the top of the press plate;

[0009] The adjusting bent plate is set to be arched, an opening is set in the center of the adjusting bent plate and the gap is matched with the pressing rod, the bottom of the disc spring is in a tight fit with the top of the mounting plate, and the adjusting bent plate passes through the pressing rod and is in a tight fit with the bottom of the mounting plate.

[0010] As a preferred solution of the thyristor press-fitting device of the present invention, the press-fitting assembly includes a mounting screw, a thyristor arranged at the bottom of the press-fitting plate, and two sets of heat sinks symmetrically installed at both ends of the mounting screw.

[0011] As a preferred solution of the thyristor press-fitting device of the present invention, the mounting top cover is configured as a boss shape, the outer side wall of the mounting top cover is provided with a scale indicator, and the mounting groove is configured as an arc groove and is adapted to the limit plate.

[0012] As a preferred solution of the thyristor press-fitting device of the present invention, the press-fitting rod is threadedly connected to the press-fitting plate, and the external thread surface of the press-fitting rod and the internal thread surface of the press-fitting plate are of the same size.

[0013] As a preferred solution of the thyristor press-fitting device of the present invention, wherein: the adjusting bent plate is provided with an opening and is clearance-matched with the mounting screw, the disc spring is matched with the mounting groove, and the disc spring is matched with the limit plate.

[0014] As a preferred solution of the thyristor press-fitting device of the present invention, the press-fitting rod passes through the adjusting bent plate and the mounting plate and is threadedly connected with the press-fitting plate.

[0015] As a preferred solution of the thyristor press-fitting device of the present invention, the mounting hole is set as a through hole, the bolt passes through the mounting hole and is threadedly connected to the mounting plate, and the bottom of the adjustment bent plate is tightly fitted with the top of the press-fitting plate.

[0016] Beneficial effects of the present invention: The present invention provides a press-fitting unit, and the disc spring cooperates with the adjusting bent plate, so that the adjustment of the press-fitting force is more flexible and accurate. Different types of thyristors can obtain the best press-fitting force by simply adjusting the stiffness and compression of the disc spring, ensuring that the thyristor is always in the best press-fitting force state during operation. The press-fitting force of the thyristor can be accurately controlled through the scale indication on the outside of the top cover and the deformation of the disc spring, ensuring that the press-fitting force is within an appropriate range, and ensuring the safety and stability of the thyristor;

[0017] Correct press-fitting force can effectively improve the heat dissipation performance of the thyristor, prevent heat accumulation caused by too high or too low press-fitting force, and thus extend the service life of the thyristor. By adjusting the stiffness and compression of the disc spring, it can adapt to different types of thyristors and has strong versatility. Under working conditions with frequent thermal cycles, it reduces the mechanical stress on the silicon wafer, increases the service life of the thyristor, avoids the wear of the cathode strip coating, and prevents the occurrence of short-circuit failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0019] Figure 1 It is a schematic diagram of the overall structure of the thyristor press-fitting device.

[0020] Figure 2 This is a schematic diagram of the installation top cover structure of the thyristor press-fitting device.

[0021] Figure 3 This is a schematic diagram of the external structure of the thyristor press-fit device.

[0022] Figure 4 This is a schematic diagram of the installation component structure of the thyristor press-fit device.

[0023] In the figure: 100, press-fitting unit; 101, mounting assembly; 102, adjustment assembly; 103, press-fitting assembly; 101a, mounting top cover; 101a-1, scale indication; 101b, mounting groove; 101c, mounting hole; 101d, mounting plate; 101e, bolt; 102a, limit plate; 102b, press-fitting rod; 102c, press-fitting plate; 102d, disc spring; 102e, adjustment bent plate; 103a, mounting screw; 103b, thyristor; 103c, radiator. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0027] Example 1

[0028] Reference Figure 1 to Figure 4, which is the first embodiment of the present invention, provides a thyristor press-fitting device, which includes a press-fitting unit 100, and an installation component 101 can facilitate the installation of an adjusted adjustment component 102 on the top of a press-fitting component 103, thereby achieving press-fitting of the thyristor 103b with an optimal preload force.

[0029] Specifically, the press-fitting unit 100 includes a mounting assembly 101, an adjustment assembly 102 mounted inside the mounting assembly 101, and a press-fitting assembly 103 disposed at the bottom of the adjustment assembly 102;

[0030] The mounting assembly 101 includes a mounting cover 101a, a mounting groove 101b disposed at the bottom of the mounting cover 101a, two sets of mounting holes 101c symmetrically disposed at both ends of the mounting cover 101a, a mounting plate 101d disposed at the bottom of the mounting cover 101a, and a bolt 101e threadedly connected to the top of the mounting plate 101d;

[0031] The adjustment assembly 102 includes a limit plate 102a, a press rod 102b fixedly connected to the bottom of the limit plate 102a, a press plate 102c disposed at the bottom of the press rod 102b, a disc spring 102d disposed at the bottom of the limit plate 102a, and an adjustment bent plate 102e disposed at the top of the press plate 102c;

[0032] The adjusting bent plate 102e is set to be arched, an opening is set in the center of the adjusting bent plate 102e and is gap-matched with the press-fitting rod 102b, the bottom of the disc spring 102d is in a tight fit with the top of the mounting plate 101d, and the adjusting bent plate 102e passes through the press-fitting rod 102b and is in a tight fit with the bottom of the mounting plate 101d.

[0033] Furthermore, the press-fit assembly 103 includes a mounting screw 103a, a thyristor 103b disposed at the bottom of the press-fit plate 102c, and two groups of heat sinks 103c symmetrically mounted at both ends of the mounting screw 103a.

[0034] Furthermore, the mounting top cover 101a is configured to be in a boss shape, a scale indicator 101a-1 is provided on the outer side wall of the mounting top cover 101a, and the mounting groove 101b is configured to be in an arc-shaped groove and is adapted to the limiting plate 102a.

[0035] Preferably, when the thyristor 103b is press-fitted, the mounting top cover 101a, the press-fitting rod 102b, the disc spring 102d, the mounting plate 101d, the adjusting bent plate 102e, and the pressing plate 102c are first assembled. The mounting top cover 101a is connected by bolts and fixed to the outside of the mounting plate 101d. The pressing rod 102b passes through the mounting plate 101d and the adjusting bent plate 102e through clearance fit, and is connected to the pressing plate 102c using threads. The mounting top cover 101a has an arc-shaped mounting groove 101b inside. There is a disc spring 102d between the mounting top cover 101a and the press-fitting rod 102b, and there is a scale indicator 101a-1 on the outside of the mounting top cover 101a.

[0036] Furthermore, the press-fitting rod 102b is threadedly connected to the press-fitting plate 102c, and the external thread surface of the press-fitting rod 102b and the internal thread surface of the press-fitting plate 102c have the same size.

[0037] Preferably, when the thyristor 103b is press-fitted, the disc spring 102d and the adjusting bent plate 102e are compressed by adjusting the thread engagement size of the press-fit plate 102c and the press-fit rod 102b, and the force on the adjusting bent plate 102e is equal to the force on the disc spring 102d. The deformation of the disc spring 102d can be determined by reading the scale indication 101a-1 on the outside of the installation top cover 101a, and then the pressure value of the disc spring 102d is confirmed. When the thyristor 103b is press-fitted, the installation assembly 101 adjusted to a certain force value is press-fitted on the two heat sinks 103c and the thyristor 103b through the installation screw 103a. The nut on the installation screw 103a is adjusted to fit the installation plate 101d, and then the installation top cover 101a, the press-fit rod 102b and the disc spring 102d are disassembled. At this time, the press-fitting force on the thyristor 103b is the same as the force on the adjusting bent plate 102e.

[0038] Furthermore, the adjustment bent plate 102e is provided with an opening and is clearance-matched with the mounting screw 103a, the disc spring 102d is adapted to the mounting groove 101b, and the disc spring 102d is adapted to the limiting plate 102a.

[0039] Furthermore, the press-fitting rod 102b passes through the adjusting bent plate 102e and the mounting plate 101d, and is threadedly connected to the press-fitting plate 102c.

[0040] Furthermore, the mounting hole 101c is configured as a through hole, and the bolt 101e passes through the mounting hole 101c and is threadedly connected to the mounting plate 101d, so that the bottom of the adjustment bent plate 102e is tightly fitted with the top of the press-fit plate 102c.

[0041] It should be noted that the disc spring 102d is located between the mounting top cover 101a and the press rod 102b. The optimal force required for different types of thyristors 103b to work can be achieved by adjusting the stiffness and compression of the disc spring 102d. The mounting top cover 101a is fixed to the mounting plate 101d by bolt connection. The mounting plate 101d presses the two heat sinks 103c and the thyristor 103b by installing the screw 103a. The mounting top cover 101a, the press rod 102b and the disc spring 102d are simple to install and debug, and can easily realize the application of the press force when the thyristor 103b is pressed. Since the production of the adjustment bent plate 102e involves metal tempering, even the products of the same batch have different stiffness. Compared with the common press-fitting of sensor readings one by one on the market, the production efficiency of the present invention can be significantly improved.

[0042] When using, when the thyristor 103b is pressed, first Figure 4 The installation assembly 101 shown is adjusted. The preload force of the adjusting bent plate 102e is adjusted by adjusting the threaded engagement size of the pressing plate 102c and the pressing rod 102b. Specifically, when the engaging thread of the pressing plate 102c and the pressing rod 102b is increased, the pressing plate 102c compresses the adjusting bent plate 102e, and the adjusting bent plate 102e is deformed by force. At the same time, the pressing rod 102b compresses the disc spring 102d, and the disc spring 102d is deformed by force. At this time, the pressing rod 102b is only subjected to the pressure applied by the disc spring 102d and the pressure applied by the pressing plate 102c, and the two pressures are equal in magnitude and opposite in direction. At the same time, the pressing plate 102c is only subjected to the pressure applied by the adjusting bent plate 102e and the pressure applied by the pressing rod 102b, and the two pressures are equal in magnitude and opposite in direction. It can be seen from this that the pressure of the adjusting bent plate 102e on the press-fitting plate 102c is equal to the pressure of the disc spring 102d on the press-fitting rod 102b, that is, the pressure of the press-fitting rod 102b on the disc spring 102d is equal to the pressure of the press-fitting plate 102c on the adjusting bent plate 102e. At the same time, the pressure value of the press-fitting rod 102b on the disc spring 102d is equal to the elastic force generated by the deformation of the disc spring 102d itself, and the pressure value of the press-fitting plate 102c on the adjusting bent plate 102e is equal to the elastic force generated by the deformation of the adjusting bent plate 102e itself. That is, the elastic force generated by the deformation of the disc spring 102d itself is equal to the elastic force generated by the deformation of the adjusting bent plate 102e itself. The elastic force generated by the adjusting bent plate 102e can be determined by identifying the size of the elastic force generated by the disc spring 102d. At the same time, the scale indicator 101a-1 on the outside of the top cover 101a can be used to identify the deformation of the disc spring 102d. Under the premise that the stiffness of the disc spring 102d is known, the elastic force generated by the disc spring 102d is confirmed by the product of the stiffness and the deformation, and then the elastic force of the adjustment bent plate 102e, that is, the preload pressure of the installation component 101, can be obtained more conveniently.

[0043] In the above technical solution, when the thyristor 103b is press-fitted, the mounting assembly 101 that has been adjusted and has the optimal preload pressure value is placed on the radiator 103c, and the mounting assembly 101 is limited by the mounting screw 103a with the two radiators 103c and the thyristor 103b. The nut on the mounting screw 103a is rotated so that the nut fits the surface of the mounting plate 101d just right. It can be considered that there is basically no pressure between the nut and the mounting plate 101d at this time. Then, the mounting top cover 101a is disassembled by removing the bolts on the mounting top cover 101a and the mounting plate 101d. Then, the press-fitting rod 102b is rotated to disengage it from the press-fitting plate 102c. During the process of the press-fitting rod 102b disengaging from the press-fitting plate 102c, the deformation of the disc spring 102d gradually decreases, and the elastic force generated also gradually decreases. At this time, because the nut on the mounting screw 103a limits the movement of the mounting plate 101d, the deformation of the adjusting bent plate 102e does not change, and the elastic force value generated by the adjusting bent plate 102e is still equal to the adjusted optimal preload value. When the press-fitting rod 102b is completely separated from the press-fitting plate 102c, the press-fitting plate 102c is only subjected to the pressure of the adjusting bent plate 102e and the radiator 103c, and the two pressures are equal in magnitude and opposite in direction. At the same time, the radiator 103c is only subjected to the pressure of the press-fitting plate 102c and the thyristor 103b, and the two pressures are equal in magnitude and opposite in direction. That is, the pressure on the thyristor 103b is equal to the elastic force value generated by the adjusting bent plate 102e, thereby achieving the press-fitting of the thyristor 103b with the optimal preload force.

[0044] In the above technical solution, the disassembled mounting top cover 101a, the press-fitting rod 102b and the disc spring 102d can be reused.

[0045] In summary, the present invention provides a press-fitting unit, and the disc spring cooperates with the adjustment bent plate to make the adjustment of the press-fitting force more flexible and accurate. Different types of thyristors can obtain the best press-fitting force by simply adjusting the stiffness and compression of the disc spring, ensuring that the thyristor is always in the best press-fitting force state during operation. The press-fitting force of the thyristor can be accurately controlled through the scale indication on the outside of the top cover and the deformation of the disc spring, ensuring that the press-fitting force is within an appropriate range, and ensuring the safety and stability of the thyristor;

[0046] Correct press-fitting force can effectively improve the heat dissipation performance of the thyristor, prevent heat accumulation caused by too high or too low press-fitting force, and thus extend the service life of the thyristor. By adjusting the stiffness and compression of the disc spring, it can adapt to different types of thyristors and has strong versatility. Under working conditions with frequent thermal cycles, it reduces the mechanical stress on the silicon wafer, increases the service life of the thyristor, avoids the wear of the cathode strip coating, and prevents the occurrence of short-circuit failures.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A thyristor press-fitting device, characterized in that: include, A press-fitting unit (100) comprising a mounting assembly (101), an adjusting assembly (102) mounted inside the mounting assembly (101), and a press-fitting assembly (103) arranged at the bottom of the adjusting assembly (102); The mounting assembly (101) comprises a mounting cover (101a), a mounting groove (101b) arranged at the bottom of the mounting cover (101a), two groups of mounting holes (101c) symmetrically arranged at two ends of the mounting cover (101a), a mounting plate (101d) arranged at the bottom of the mounting cover (101a), and a bolt (101e) threadedly connected to the top of the mounting plate (101d); The adjustment component (102) comprises a limit plate (102a), a press rod (102b) fixedly connected to the bottom of the limit plate (102a), a press plate (102c) arranged at the bottom of the press rod (102b), a disc spring (102d) arranged at the bottom of the limit plate (102a), and an adjustment bent plate (102e) arranged at the top of the press plate (102c); The adjusting bent plate (102e) is configured to be arched, an opening is provided at the center of the adjusting bent plate (102e) and is clearance-matched with the pressing rod (102b), the bottom of the disc spring (102d) and the top of the mounting plate (101d) are in a tightly fitted state, and the adjusting bent plate (102e) passes through the pressing rod (102b) and is in a tightly fitted state with the bottom of the mounting plate (101d); The press-fitting rod (102b) is threadedly connected to the press-fitting plate (102c), and the external thread surface of the press-fitting rod (102b) and the internal thread surface of the press-fitting plate (102c) have the same size; The press-fitting rod (102b) passes through the adjusting bent plate (102e) and the mounting plate (101d), and is threadedly connected to the press-fitting plate (102c); The mounting hole (101c) is configured as a through hole, the bolt (101e) passes through the mounting hole (101c) and is threadedly connected to the mounting plate (101d), and the bottom of the adjustment bent plate (102e) is tightly fitted with the top of the press-fit plate (102c); The mounting top cover (101a) is configured as a boss shape, the outer side wall of the mounting top cover (101a) is provided with a scale indicator (101a-1), and the mounting groove (101b) is configured as an arc-shaped groove and is adapted to the limiting plate (102a).

2. The thyristor press-fitting device according to claim 1, characterized in that: The press-fit assembly (103) comprises a mounting screw (103a), a thyristor (103b) arranged at the bottom of the press-fit plate (102c), and two groups of heat sinks (103c) symmetrically mounted at both ends of the mounting screw (103a).

3. The thyristor press-fitting device according to claim 2, characterized in that: The adjusting bent plate (102e) is provided with an opening and is clearance-matched with the mounting screw rod (103a); the disc spring (102d) is matched with the mounting groove (101b); and the disc spring (102d) is matched with the limiting plate (102a).

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