Capacitor mounting structure in frequency converter

Abstract

The utility model is suitable for the technical field of capacitor installation, and provides a capacitor installation structure in a frequency converter. The outer baffle ring and the inner baffle ring are integrally formed on the top of the supporting disc, and the outer baffle ring is located on the outer side of the inner baffle ring; the linkage rod penetrates through the bottom of the supporting disc; the first wedge block is welded at the top end of the linkage rod; the limiting rod penetrates through the outer side wall of the inner baffle ring; the second wedge block is welded at one end of the limiting rod; through the matching of the first wedge block and the second wedge block, the linkage rod realizes the movement of the limiting rods under the pressure of the capacitor, the four limiting rods are in contact with the outer side of the capacitor to realize limiting, the capacitor is prevented from shaking, the capacitor can be supported, and the problems that pins are bent and deformed due to stress and are easy to loosen and even fall off due to long-time suspension of the capacitor are solved; the capacitor is simple and convenient to install, and only needs to be inserted into the inner baffle ring at the top of the supporting disc.

Description

Technical Field

[0001] The utility model belongs to the technical field of capacitor installation, and in particular relates to a capacitor installation structure in a frequency converter. Background Art

[0002] The inverter is an electric power control device that applies frequency conversion technology and microelectronics technology to control the AC motor by changing the working power frequency of the motor. A large number of capacitors need to be installed in the inverter. The capacitor usually uses metal foil as the positive electrode and the metal foil has an insulating oxide layer.

[0003] Most of the capacitors in the inverter in the prior art are directly supported by pins. Since the pins of some capacitors are soft, the capacitors are easily shaken when suspended in the air for a long time, causing the connection between the pins and the circuit board in the inverter to loosen or even fall off, which can easily damage the capacitor.

[0004] Therefore, a capacitor installation structure in a frequency converter is proposed. Utility Model Content

[0005] The utility model provides a capacitor installation structure in a frequency converter, aiming to solve the above-mentioned problem.

[0006] The utility model is implemented as follows: a capacitor installation structure in a frequency converter comprises: a support plate; an outer retaining ring and an inner retaining ring integrally formed on the top of the support plate, the outer retaining ring being located on the outside of the inner retaining ring; a linkage rod penetrating the bottom of the support plate; a first wedge welded to the top of the linkage rod; a limit rod penetrating the outer wall of the inner retaining ring; a second wedge welded to one end of the limit rod; a spring fixed between the outer wall of the second wedge and the outer wall of the inner retaining ring by adhesive bonding; a circular hole provided at the central position of the bottom of the support plate; and a support rod provided at a position of the bottom of the support plate close to one side of the circular hole; a rod sleeve sleeved on the outer wall of the support rod; and a fastening nut screwed on the outer wall of the rod sleeve by threading.

[0007] A capacitor installation structure in a frequency converter also includes a frequency converter circuit board arranged below the support plate; a solder hole opened on the top of the frequency converter circuit board; a capacitor embedded in the inner side of the inner retaining ring; and a pin arranged at the bottom of the capacitor, wherein the pin and the solder hole are connected by solder.

[0008] Preferably, the rod sleeve and the inverter circuit board are fixedly connected via a nut, and two support rods are provided, and the two support rods are symmetrically arranged at the bottom of the support plate.

[0009] Preferably, the cross-section of the linkage rod is a U-shaped structure, and the height of one end of the linkage rod is located at the height of the other end, one end of the linkage rod is located between the outer retaining ring and the inner retaining ring, and the other end of the linkage rod is located on the inner side of the inner retaining ring.

[0010] Preferably, a matching inclined surface is provided on the outer wall of one side adjacent to the first block and the second block.

[0011] Preferably, four linkage rods are provided in total, and the four linkage rods all pass through the bottom of the support plate.

[0012] Preferably, the pin passes through the circular hole.

[0013] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0014] Through the matching fit of the first wedge block and the second wedge block, the linkage rod can realize the movement of the limit rod under the pressure of the capacitor, and the four limit rods contact the outside of the capacitor to achieve limiting, which can prevent the capacitor from shaking and support the capacitor, avoid the pins from bending and deforming due to force, and prevent the pins from loosening or even falling off due to the capacitor being suspended in the air for a long time. The installation of the capacitor is simple and convenient, and you only need to insert the capacitor into the inner retaining ring on the top of the support plate. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is a schematic diagram of the support plate structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the support rod structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the first and second deed blocks of the utility model;

[0019] Figure 5 It is a cross-sectional view of the support plate, the outer retaining ring and the inner retaining ring of the utility model.

[0020] In the figure: 1. support plate; 2. outer stop ring; 3. inner stop ring; 4. linkage rod; 5. first wedge; 6. limit rod; 7. second wedge; 8. spring; 9. round hole; 10. support rod; 11. rod sleeve; 12. fastening nut; 13. inverter circuit board; 14. solder hole; 15. capacitor; 16. pin. DETAILED DESCRIPTION

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] The utility model embodiment provides a capacitor installation structure in a frequency converter, such as Figure 1-5 As shown, it includes a support plate 1, an outer retaining ring 2 and an inner retaining ring 3 are integrally formed on the top of the support plate 1, the outer retaining ring 2 is located on the outside of the inner retaining ring 3, the bottom of the support plate 1 passes through a linkage rod 4, a total of four linkage rods 4 are provided, and the four linkage rods 4 all pass through the bottom of the support plate 1, a first wedge 5 is welded on the top of the linkage rod 4, a limiting rod 6 is passed through the outer wall of one side of the inner retaining ring 3, a second wedge 7 is welded at one end of the limiting rod 6, a spring 8 is fixedly connected between the outer wall of the second wedge 7 and the outer wall of the inner retaining ring 3 by adhesive bonding, a circular hole 9 is opened at the central position of the bottom of the support plate 1 near the inner side of the inner retaining ring 3, A support rod 10 is welded at the bottom of the support plate 1 near the outer side of the circular hole 9, and a rod sleeve 11 is sleeved on the outer side of the support rod 10. The rod sleeve 11 and the inverter circuit board 13 are fixedly connected by a nut. There are two support rods 10 in total, and the two support rods 10 are symmetrically arranged at the bottom of the support plate 1. A fastening nut 12 is screwed on the outer wall of one side of the rod sleeve 11 through a threaded engagement. An inverter circuit board 13 is arranged at the lower position of the support plate 1, and a solder hole 14 is opened on the top of the inverter circuit board 13. A capacitor 15 is arranged on the inner side of the inner retaining ring 3, and a pin 16 is arranged at the bottom of the capacitor 15, and the pin 16 passes through the circular hole 9.

[0024] It should be noted that since most of the capacitors in existing inverters are directly supported by pins, and since the pins of some capacitors are relatively soft, if the capacitor is suspended in the air for a long time, the capacitor is prone to shaking, causing the connection between the pins and the circuit board in the inverter to loosen or even fall off, which can easily damage the capacitor. In this embodiment, the first wedge block 5 and the second wedge block 7 are matched and fitted, so that the linkage rod 4 can realize the movement of the limit rod 6 under the pressure of the capacitor 15, and the four limit rods 6 contact the outside of the capacitor 15 to achieve limiting, avoiding the shaking of the capacitor 15 and supporting the capacitor 15, avoiding the problem of the pin 16 being bent and deformed by force and the pin 16 being loosened or even falling off when the capacitor 15 is suspended in the air for a long time. The installation of the capacitor 15 is simple and convenient, and the capacitor 15 only needs to be inserted into the inner retaining ring 3 on the top of the support plate 1.

[0025] Specifically, in the present embodiment, the present scheme mainly includes the linkage rod 4. When installing the capacitor 15 in the inverter, the capacitor 15 is inserted into the inner side of the inner retaining ring 3. The bottom of the capacitor 15 contacts one end of the linkage rod 4. The linkage rod 4 moves downward after being compressed. The other end of the linkage rod 4 moves downward synchronously. The first block 5 at one end of the linkage rod 4 moves downward. Through the fit between the first block 5 and the second block 7, the first block 5 pushes the second block 7 during the downward movement. Under the guidance of the limit rod 6, the second block 7 moves horizontally and pushes the limit rod 6 to move. The spring 8 is subjected to force Stretch (spring 8 provides reset force for resetting the second wedge 7 after stretching), one end of the limit rod 6 contacts the outer wall of the capacitor 15 during the horizontal movement, and the limit rod 6 can limit the position of the capacitor 15 on the inner side of the inner retaining ring 3. After the pin 16 passes through the circular hole 9, the height of the support plate 1 is adjusted according to the length of the pin 16. After the support rod 10 is extended and retracted, it is locked with the fastening nut 12, and the pin 16 and the solder hole 14 on the inverter circuit board 13 are soldered. The pin 16 is not in a pulling state, and the capacitor 15 is installed and fixed in the inverter.

[0026] In a further preferred embodiment of the present invention, Figure 5 As shown, the cross-section of the linkage rod 4 is a U-shaped structure, and the height of one end of the linkage rod 4 is located at the height of the other end, one end of the linkage rod 4 is located between the outer stop ring 2 and the inner stop ring 3, and the other end of the linkage rod 4 is located on the inner side of the inner stop ring 3.

[0027] In this embodiment, through the linkage of the two ends of the linkage rod 4, the capacitor 15 can press down one end of the linkage rod 4 and then the other end can be raised and lowered synchronously, thereby realizing the extension and retraction of the limit rod 6 in linkage.

[0028] In a further preferred embodiment of the present invention, Figure 4-5 As shown, a matching inclined surface is provided on the outer wall of one side adjacent to the first block 5 and the second block 7.

[0029] In this embodiment, through the engagement of the first block 5 and the second block 7, the first block 5 can squeeze the second block 7, thereby pushing the second block 7 to move.

[0030] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the utility model is not limited by the described action sequence, because according to the utility model, some steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the utility model.

[0031] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic, such as the division of the above-mentioned units. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0032] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0033] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A capacitor installation structure in a frequency converter, characterized in that: include: Support plate (1); An outer retaining ring (2) and an inner retaining ring (3) are integrally formed on the top of the support plate (1), wherein the outer retaining ring (2) is located outside the inner retaining ring (3); A linkage rod (4) passing through the bottom of the support plate (1); A first wedge (5) welded to the top end of the linkage rod (4); A limiting rod (6) penetrating the outer wall of the inner retaining ring (3); A second wedge (7) welded to one end of the limiting rod (6); A spring (8) fixed between the outer wall of the second wedge (7) and the outer wall of the inner retaining ring (3) by adhesive bonding; A circular hole (9) is provided at the central position of the bottom of the support plate (1); and A support rod (10) disposed at a position on one side of the bottom of the support plate (1) close to the circular hole (9); A rod sleeve (11) sleeved on the outer side wall of the support rod (10); A fastening nut (12) is screwed onto the outer side wall of the rod sleeve (11) through a thread.

2. A capacitor installation structure in a frequency converter as claimed in claim 1, characterized in that: It also includes a frequency converter circuit board (13) disposed below the support plate (1); A solder hole (14) formed on the top of the inverter circuit board (13); A capacitor (15) embedded inside the inner retaining ring (3); A pin (16) is provided at the bottom of the capacitor (15), and the pin (16) is connected to the solder hole (14) by soldering.

3. The capacitor installation structure in a frequency converter according to claim 1, characterized in that: The rod sleeve (11) and the inverter circuit board (13) are fixedly connected via a nut, and two support rods (10) are provided in total, and the two support rods (10) are symmetrically arranged at the bottom of the support plate (1).

4. The capacitor installation structure in a frequency converter according to claim 1, characterized in that: The cross section of the linkage rod (4) is a U-shaped structure, and the height of one end of the linkage rod (4) is located at the height of the other end, one end of the linkage rod (4) is located between the outer retaining ring (2) and the inner retaining ring (3), and the other end of the linkage rod (4) is located on the inner side of the inner retaining ring (3).

5. The capacitor installation structure in a frequency converter according to claim 1, characterized in that: A matching inclined surface is provided on the outer wall of one side adjacent to the first block (5) and the second block (7).

6. The capacitor installation structure in a frequency converter according to claim 1, characterized in that: A total of four linkage rods (4) are provided, and the four linkage rods (4) all pass through the bottom of the support plate (1).

7. The capacitor installation structure in a frequency converter according to claim 2, characterized in that: The pin (16) passes through the circular hole (9).

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