Power electronic film capacitor

Abstract

The utility model discloses a power electronic film capacitor, and relates to the technical field of capacitors, in particular to a power electronic film capacitor, which comprises a shell, a capacitor core body arranged in the shell and an insulating filling layer filled between the shell and the capacitor core body, a limiting groove is formed in the side face of the pin, a push rod is movably connected into the shell in a sleeved mode, a sliding ring is connected to the inner side end of the push rod, the sliding ring is movably installed on the outer side of the pin, and a limiting rod is connected into the sliding ring. According to the power electronic film capacitor, the replaceable pins are arranged, when the pins are too short, the push rod can be pressed to enable the sliding ring to slide inwards, the limiting rod can be separated from the limiting groove at the moment, then the pins are pulled out to be replaced with longer pins, the reusability is better, and the problem that the pins are difficult to replace is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a power electronic film capacitor. Background Art

[0002] There are many types of capacitors, depending on the dielectric, such as: electrolyte capacitors, paper capacitors, film capacitors, ceramic capacitors, mica capacitors, air capacitors, etc. Film capacitors are also called plastic film capacitors. They use plastic film as the dielectric. Film capacitors are excellent capacitors because they have many excellent properties. Its main properties are as follows: no polarity, high insulation impedance, excellent frequency characteristics (wide frequency response), and low dielectric loss. Based on the above advantages, film capacitors are widely used in analog circuits.

[0003] Patent publication number CN210403520U proposes a film capacitor cover, including: a plurality of limit blocks are arranged on the side edge of the capacitor cover, the center line of the figure formed by the outer edges of the plurality of limit blocks coincides with the center axis of the capacitor cover, and the plurality of limit blocks can contact the inner wall of the capacitor housing to ensure that the center axis of the capacitor cover coincides with the center axis of the capacitor housing. The film capacitor of the utility model increases the fixed structure or structural rigidity of the capacitor cover by arranging explosion-proof blocks around the capacitor cover, and the explosion-proof blocks around the capacitor cover fit tightly with the capacitor housing, thereby ensuring that the capacitor cover fits tightly with the capacitor housing, and finally making the manufactured film capacitor have better capacitance sealing quality. This result has the following shortcomings in actual use: the existing film capacitors have poor reusability, cannot be reused when encountering problems such as too short pins, and have the problem of difficulty in replacing pins. For this reason, we provide a power electronic film capacitor. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a power electronic film capacitor, which solves the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a power electronic thin film capacitor, including a shell, a capacitor core installed inside the shell, and an insulating filling layer filled between the shell and the capacitor core, the shell is movably sleeved with pins, the side of the pin is provided with a limiting groove, the shell is movably sleeved with a push rod, the inner end of the push rod is connected to a slip ring, the slip ring is movably installed on the outer side of the pin, the interior of the slip ring is connected to a limiting rod, the end of the slip ring away from the push rod is connected to a reset spring, and the bottom of the shell is fixedly connected to a sealing seat.

[0006] Optionally, an electrode terminal is fixedly connected to the bottom of the capacitor core, a plug hole is provided inside the electrode terminal, and the top end of the pin is inserted into the inside of the electrode terminal.

[0007] Optionally, one end of the push rod away from the slip ring extends to the outside of the housing, the number of the push rods is the same as the number of the pins, and the slip ring is slidably installed inside the housing.

[0008] Optionally, the bottom end of the pin extends to the outside of the shell, the limiting groove is located at the end of the pin inserted into the inside of the shell, and the limiting rod matches the limiting groove.

[0009] Optionally, a groove is provided at the bottom of the shell, the push rod is located in the groove, and a protective ring is sleeved on the external thread of the groove, and the protective ring covers the outside of the push rod.

[0010] Optionally, the sealing seat is located directly below the electrode terminal, and sealing ring 1 and sealing ring 2 are fixedly installed inside the sealing seat. The pin passes through the inside of the sealing seat, and sealing ring 1 and sealing ring 2 are interference fit on the outside of the pin.

[0011] Optionally, the outer end of the push rod is covered with a waterproof membrane, and the edge of the waterproof membrane is adhered to the shell.

[0012] The utility model provides a power electronic film capacitor, which has the following beneficial effects:

[0013] 1. The power electronic film capacitor is provided with replaceable pins. When the pins are too short, the push rod can be pressed to make the slip ring slide inward. At this time, the limit rod will be separated from the limit groove, and then the pins can be pulled out and replaced with longer pins. The reusability is better and the problem of difficult pin replacement is solved. By installing a protective ring at the bottom of the shell and sealing the outside of the push rod with the protective ring, the push rod can be prevented from accidentally touching during installation, thereby improving the safety of use.

[0014] 2. The power electronic thin film capacitor has a sealing seat arranged at the bottom of the shell. The sealing rings 1 and 2 inside the sealing seat can seal the plug interface of the pin to prevent external dust and water vapor from entering the interior of the shell, thereby improving the sealing effect of the shell. A waterproof film is arranged and the outer end of the push rod is sealed by the waterproof film, thereby preventing external dust and water vapor from entering the interior of the shell through the gap around the push rod, thereby further improving the sealing effect of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2It is a schematic diagram of the structure of the utility model in cross section;

[0017] Figure 3 This is a schematic diagram of the structure of the utility model when the protective ring is removed;

[0018] Figure 4 This is a schematic diagram of the structure of the capacitor core of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the slip ring of the utility model;

[0020] Figure 6 For this utility model Figure 2 A magnified view of middle;

[0021] Figure 7 It is a schematic diagram of the structure of the pin of the utility model;

[0022] Figure 8 For this utility model Figure 5 Schematic diagram of the structure of B.

[0023] In the figure: 1. Shell; 2. Insulating filling layer; 3. Capacitor core; 4. Electrode terminal; 5. Pin; 51. Limiting groove; 6. Push rod; 7. Slip ring; 8. Limiting rod; 9. Reset spring; 10. Protective ring; 11. Sealing seat; 12. Sealing ring 1; 13. Sealing ring 2; 14. Waterproof membrane. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] See also Figure 1 , Figure 2 , Figure 4 , Figure 7The utility model provides a technical solution: a power electronic film capacitor, comprising a shell 1, a capacitor core 3 installed inside the shell 1, and an insulating filling layer 2 filled between the shell 1 and the capacitor core 3. The bottom of the capacitor core 3 is fixedly connected with an electrode terminal 4, and a jack is provided inside the electrode terminal 4. By setting the electrode terminal 4, after the top of the pin 5 is inserted into the electrode terminal 4, the electrode terminal 4 can clamp the pin 5 to improve the firmness of the connection. The inner movable sleeve of the shell 1 is provided with a pin 5, the top of the pin 5 is inserted into the inside of the electrode terminal 4, and a limiting groove 51 is provided on the side of the pin 5. The bottom end of the pin 5 extends to the outside of the shell 1, and the limiting groove 51 is located at the end of the pin 5 inserted into the inside of the shell 1. By setting a replaceable pin 5, when the pin 5 is too short, the pin 5 can be pulled out and replaced with a longer pin 5, which has better reusability and solves the problem of difficulty in replacing the pin 5.

[0026] See also Figure 2 , Figure 5 , Figure 6 The inner side of the housing 1 is movably sleeved with a push rod 6, and the inner side of the push rod 6 is connected with a slip ring 7. The end of the push rod 6 away from the slip ring 7 extends to the outside of the housing 1. The number of the push rods 6 is the same as the number of the pins 5. By setting the push rod 6, when the pin 5 is to be replaced, the push rod 6 can be pressed inward to push the slip ring 7 to slide inward, thereby driving the limit rod 8 to separate from the limit groove 51, and contacting the pin 5. The slip ring 7 is slidably installed in the interior of the housing 1, and the slip ring 7 is movably installed on the outside of the pin 5. There is a limit rod 8 connected internally, which matches the limit groove 51. Through the coordinated use of the limit rod 8 and the limit groove 51, after the pin 5 is inserted into the housing 1, the limit rod 8 will be stuck in the limit groove 51 to lock the pin 5. A return spring 9 is connected to the end of the slip ring 7 away from the push rod 6. By setting the return spring 9, the return spring 9 is in a compressed state. The return spring 9 is used to give the slip ring 7 an outward elastic force, which can make the limit rod 8 automatically clamp the pin 5 to prevent the pin 5 from falling off.

[0027] See also Figure 1 , Figure 3 A groove is provided at the bottom of the shell 1, and the push rod 6 is located in the groove. A protective ring 10 is sleeved on the external thread of the groove, and the protective ring 10 covers the outside of the push rod 6. By installing the protective ring 10 on the bottom of the shell 1 and using the protective ring 10 to seal the outside of the push rod 6, the push rod 6 can be prevented from accidentally touching during installation, thereby improving safety in use.

[0028] See also Figure 2 , Figure 5 , Figure 6 , Figure 8A sealing seat 11 is fixedly connected to the bottom of the shell 1, and the sealing seat 11 is located directly below the electrode terminal 4. A sealing ring 12 and a sealing ring 2 13 are fixedly installed inside the sealing seat 11. By setting the sealing seat 11, the sealing ring 12 and the sealing ring 2 13 inside the sealing seat 11 can seal the plug interface of the pin 5 to prevent external dust and water vapor from entering the interior of the shell 1, thereby improving the sealing effect of the shell 1. The pin 5 passes through the interior of the sealing seat 11, and the sealing ring 12 and the sealing ring 2 13 are interference fit on the outside of the pin 5. The outer end of the push rod 6 is covered with a waterproof film 14, and the edge of the waterproof film 14 is adhered to the shell 1. By setting the waterproof film 14 and using the waterproof film 14 to seal the outer end of the push rod 6, it is possible to prevent external dust and water vapor from entering the interior of the shell 1 through the gap around the push rod 6, thereby further improving the sealing effect of the shell 1.

[0029] In summary, when the power electronic film capacitor is in use, when the pin 5 is to be replaced, the protective ring 10 is first rotated and removed, and then the push rod 6 is pressed inward, and the slip ring 7 is pushed inward by the push rod 6. At this time, the slip ring 7 drives the limit rod 8 to separate from the limit groove 51 on the side of the pin 5, and the pin 5 is locked. Then the pin 5 is pulled out downward for replacement. The sealing ring 12 and the sealing ring 2 13 inside the sealing seat 11 are interference fit on the outside of the pin 5, which can seal the pin 5 to prevent external dust and water vapor from entering the housing 1 through the gap outside the pin 5. The waterproof film 14 outside the push rod 6 can seal the push rod 6 to prevent external dust and water vapor from entering the housing 1 through the gap outside the push rod 6.

[0030] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0031] 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. A power electronic thin film capacitor, comprising a housing (1), a capacitor core (3) installed inside the housing (1), and an insulating filling layer (2) filled between the housing (1) and the capacitor core (3), characterized in that: The housing (1) is movably sleeved with a pin (5), a side surface of the pin (5) is provided with a limiting groove (51), the housing (1) is movably sleeved with a push rod (6), the inner end of the push rod (6) is connected to a slip ring (7), the slip ring (7) is movably mounted on the outer side of the pin (5), the interior of the slip ring (7) is connected to a limiting rod (8), the end of the slip ring (7) away from the push rod (6) is connected to a return spring (9), and the bottom of the housing (1) is fixedly connected to a sealing seat (11).

2. A power electronic film capacitor according to claim 1, characterized in that: The bottom of the capacitor core (3) is fixedly connected to an electrode terminal (4), a plug hole is provided inside the electrode terminal (4), and the top end of the pin (5) is inserted into the inside of the electrode terminal (4).

3. A power electronic film capacitor according to claim 1, characterized in that: One end of the push rod (6) away from the slip ring (7) extends to the outside of the housing (1), the number of the push rods (6) is the same as the number of the pins (5), and the slip ring (7) is slidably installed inside the housing (1).

4. A power electronic film capacitor according to claim 1, characterized in that: The bottom end of the pin (5) extends to the outside of the housing (1), the limiting groove (51) is located at the end of the pin (5) inserted into the inside of the housing (1), and the limiting rod (8) matches the limiting groove (51).

5. A power electronic film capacitor according to claim 1, characterized in that: A groove is provided at the bottom of the housing (1), the push rod (6) is located in the groove, and a protective ring (10) is sleeved on the outer thread of the groove, and the protective ring (10) covers the outside of the push rod (6).

6. A power electronic thin film capacitor according to claim 1, characterized in that: The sealing seat (11) is located directly below the electrode terminal (4); a sealing ring 1 (12) and a sealing ring 2 (13) are fixedly installed inside the sealing seat (11); the pin (5) passes through the inside of the sealing seat (11); and the sealing ring 1 (12) and the sealing ring 2 (13) are interference-fitted on the outside of the pin (5).

7. A power electronic thin film capacitor according to claim 1, characterized in that: The outer end of the push rod (6) is covered with a waterproof membrane (14), and the edge of the waterproof membrane (14) is bonded to the outer shell (1).

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