Fixing structure and frequency converter
The combination design of the mounting base and the limiting structure solves the problem of poor fixing effect of the inverter capacitor board, improves the shock resistance, and extends the product life.
Patent Information
- Application Number
- CN202423080860.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-12
AI Technical Summary
The capacitor board of the existing frequency converter is poorly fixed, resulting in poor shock resistance and reduced product lifespan.
The design employs a combination of mounting base, mounting plate, and limiting structure. The first limiting structure restricts the movement of the mounting plate in the thickness direction, and the second limiting structure restricts the movement of the mounting plate in the extension direction, ensuring that the capacitor plate is firmly fixed to the mounting base.
This effectively improves the fixing effect of the capacitor board, enhances the vibration resistance of the frequency converter, and extends the service life of the product.
Smart Images
Figure CN223772333U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of frequency converter technology, and in particular to a fixed structure and a frequency converter. Background Technology
[0002] A variable-frequency drive (VFD) is a power control device that uses frequency conversion technology and microelectronics to control an AC motor by changing the frequency of its power supply. A VFD mainly consists of a rectification unit (AC to DC), a filter, an inverter (DC to AC), a braking unit, a drive unit, a detection unit, and a microprocessor unit. The VFD adjusts the voltage and frequency of the output power supply by switching its internal IGBTs (Insulated Gate Bipolar Transistors), providing the required power voltage according to the actual needs of the motor, thereby achieving energy saving and speed regulation. In addition, VFDs have many protection functions, such as overcurrent, overvoltage, and overload protection. With the continuous improvement of industrial automation, VFDs have been widely used and have become an indispensable component for modern motor energy saving and speed control, with particularly significant effects in the industrial control field. However, the capacitor plate fixing effect of existing VFDs is poor, resulting in poor vibration resistance and significantly reducing the product's service life. Utility Model Content
[0003] The main purpose of this invention is to propose a fixing structure and a frequency converter, which aims to solve the problem of poor capacitor plate fixing effect in existing frequency converters.
[0004] To achieve the above objectives, the present invention proposes a fixing structure for use in a frequency converter, the fixing structure comprising:
[0005] Mounting base;
[0006] Mounting plate, wherein the mounting plate is provided with capacitors; and
[0007] At least two limiting structures are provided, each of the limiting structures including a limiting part and a mating part, one of the limiting part and the mating part being provided on the mounting base and the other being provided on the mounting plate. The at least two limiting structures include a first limiting structure and a second limiting structure. The first limiting structure is used to limit the movement of the mounting plate along its thickness direction, and the second limiting structure is used to limit the movement of the mounting plate along its extension direction.
[0008] In one embodiment, the mounting base is provided with a slot for the periphery of the mounting plate to be engaged;
[0009] In the first limiting structure, the limiting part includes a slot, and the mating part includes the periphery of the mounting plate.
[0010] In one embodiment, two card slots are provided, and the openings of the two card slots are arranged opposite each other.
[0011] In one embodiment, the slot has a bottom wall opposite to its opening, and the bottom wall of the slot abuts against the peripheral side of the mounting plate.
[0012] In one embodiment, the mounting base includes a base body and a mounting protrusion disposed on the base body;
[0013] The slot is located at the end of the mounting protrusion away from the main body of the seat.
[0014] In one embodiment, the end of the mounting protrusion away from the seat body is provided with a guide slope.
[0015] In one embodiment, in the second limiting structure, the limiting part is configured as a limiting post extending along the thickness direction of the mounting plate, and correspondingly, the mating part is configured as a mating hole.
[0016] In one embodiment, the limiting post and the mating hole are configured as a limiting group, and multiple limiting groups are provided, which are spaced apart along the extension direction of the mounting plate.
[0017] In one embodiment, the limiting post includes a first limiting segment with a larger cross-section and a second limiting segment with a smaller cross-section to form a positioning step surface for abutting against the mounting plate.
[0018] In one embodiment, the fixing structure further includes a circuit board assembly, which is connected to the mounting plate via a threaded connection structure; and / or,
[0019] The fixing structure also includes a heat sink disposed on the mounting base.
[0020] In one embodiment, the fixing structure further includes a mounting bracket disposed between the circuit board assembly and the mounting plate.
[0021] In one embodiment, the mounting bracket is provided with a relief groove, the mounting plate is provided with a mounting post, the mounting post is provided with a fixing hole, and can pass through the relief groove to abut against the circuit board assembly;
[0022] The threaded connection structure includes a threaded connector with threads passing through the fixing hole.
[0023] Furthermore, this utility model also provides a frequency converter, including the aforementioned fixing structure, wherein the fixing structure includes:
[0024] Mounting base;
[0025] Mounting plate, wherein the mounting plate is provided with capacitors; and
[0026] At least two limiting structures are provided, each of the limiting structures including a limiting part and a mating part, one of the limiting part and the mating part being provided on the mounting base and the other being provided on the mounting plate. The at least two limiting structures include a first limiting structure and a second limiting structure. The first limiting structure is used to limit the movement of the mounting plate along its thickness direction, and the second limiting structure is used to limit the movement of the mounting plate along its extension direction.
[0027] In the technical solution of this utility model, by setting the mounting base to support the mounting plate, by setting the mounting plate to install the capacitor, by setting the first limiting structure to restrict the movement of the mounting plate in its thickness direction, and by setting the second limiting structure to restrict the movement of the mounting plate in its extension direction, the first limiting structure and the second limiting structure can restrict the movement of the mounting plate in both its thickness direction and its extension direction, thereby fixing the mounting plate to the mounting base and solving the problem of poor capacitor plate fixing effect in existing frequency converters. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0029] Figure 1 An exploded view of an embodiment of the fixing structure provided by this utility model;
[0030] Figure 2 for Figure 1 A three-dimensional structural diagram of the fixed structure (concealed mounting bracket and circuit board assembly);
[0031] Figure 3 for Figure 1 A three-dimensional structural diagram of the fixed structure (hidden circuit board assembly);
[0032] Figure 4 for Figure 1 A three-dimensional structural diagram of a fixed structure.
[0033] Explanation of icon numbers:
[0034] 100. Fixed structure; 1. Mounting base; 11. Base body; 12. Mounting protrusion; 121. Guide slope; 2. Mounting plate; 21. Mounting post; 3. Limiting structure; 31. First limiting structure; 32. Second limiting structure; 33. Limiting part; 331. Slot; 332. Limiting post; 3321. Positioning step surface; 4. Circuit board assembly; 5. Heat sink; 6. Mounting bracket; 7. Screw connector.
[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0039] A variable-frequency drive (VFD) is a power control device that uses frequency conversion technology and microelectronics to control an AC motor by changing the frequency of its power supply. A VFD mainly consists of a rectification unit (AC to DC), a filter, an inverter (DC to AC), a braking unit, a drive unit, a detection unit, and a microprocessor unit. The VFD adjusts the voltage and frequency of the output power supply by switching its internal IGBTs (Insulated Gate Bipolar Transistors), providing the required power voltage according to the actual needs of the motor, thereby achieving energy saving and speed regulation. In addition, VFDs have many protection functions, such as overcurrent, overvoltage, and overload protection. With the continuous improvement of industrial automation, VFDs have been widely used and have become an indispensable component for modern motor energy saving and speed control, with particularly significant effects in the industrial control field. However, the capacitor plate fixing effect of existing VFDs is poor, resulting in poor vibration resistance and significantly reducing the product's service life.
[0040] Based on this, this utility model proposes a fixing structure for frequency converters, aiming to solve the problem of poor capacitor plate fixing effect in existing frequency converters. Among other things, Figures 1 to 4 A schematic diagram of the fixing structure provided by this utility model.
[0041] Please see Figures 1 to 4 In one embodiment of this utility model, the fixing structure 100 includes a mounting base 1, a mounting plate 2, and at least two limiting structures 3. The mounting plate 2 is provided with a capacitor. Each of the limiting structures 3 includes a limiting part 33 and a mating part. One of the limiting part 33 and the mating part is provided on the mounting base 1, and the other is provided on the mounting plate 2. The at least two limiting structures 3 include a first limiting structure 31 and a second limiting structure 32. The first limiting structure 31 is used to limit the movement of the mounting plate 2 along its thickness direction, and the second limiting structure 32 is used to limit the movement of the mounting plate 2 along its extension direction.
[0042] It should be noted that the mounting base 1 is the main load-bearing structure and needs to have a certain degree of hardness and strength. Its material can be various, such as metals like iron and steel, or polymers like plastics, etc., and this utility model does not limit this. The mounting base 1 can have various shapes, such as circular or rectangular, and this utility model does not limit this. Meanwhile, the mounting plate 2 is mainly used to support the capacitor. Other materials can be various, such as metals like iron and aluminum, or polymers like plastics, etc., and this utility model does not limit this. The mounting plate 2 can have various shapes, such as circular or polygonal, and this utility model does not limit this. Furthermore, the extension direction of the mounting plate 2 refers to the direction of the plane in which the mounting plate 2 is located. For example, if the mounting plate 2 is horizontally positioned, then its extension direction is horizontal.
[0043] In the technical solution of this utility model, by setting the mounting base 1 to support the mounting plate 2, by setting the mounting plate 2 to install the capacitor, by setting the first limiting structure 31 to restrict the movement of the mounting plate 2 in its thickness direction, and by setting the second limiting structure 32 to restrict the movement of the mounting plate 2 in its extension direction, the first limiting structure 31 and the second limiting structure 32 can restrict the movement of the mounting plate 2 in both its thickness direction and its extension direction, thereby fixing the mounting plate 2 to the mounting base 1, thus solving the problem of poor capacitor plate fixing effect in existing frequency converters.
[0044] In one embodiment of this utility model, please refer to Figure 1 and Figure 2 The mounting base 1 is provided with a slot 331 for engaging with the periphery of the mounting plate 2. In the first limiting structure 31, the limiting part 33 includes the slot 331, and the mating part includes the periphery of the mounting plate 2. Thus, by providing the slot 331 to engage with the periphery of the mounting plate 2, the movement of the mounting plate 2 in its thickness direction is restricted.
[0045] It should be noted that there are multiple ways to set the first limiting structure 31. In another embodiment, the mounting base 1 is provided with a first locking protrusion and a second locking protrusion. The first locking protrusion extends along the thickness direction of the mounting plate 2 and is used to abut against the side of the mounting plate 2 facing the mounting base 1. The second locking protrusion is used to abut against the side of the mounting plate 2 away from the mounting base 1. In this way, the first limiting structure 31 includes a first locking protrusion and a second locking protrusion. Thus, by setting the first locking protrusion, the movement of the mounting plate 2 towards the mounting base 1 is restricted, and by setting the second locking protrusion, the movement of the mounting plate 2 away from the mounting base 1 is restricted, thereby restricting the movement of the mounting plate 2 in its thickness direction.
[0046] Furthermore, the number of slots 331 is not limited; there may be one or more, etc. This utility model does not limit this. Specifically, in this embodiment, two slots 331 are provided, and the openings of the two slots 331 are arranged opposite to each other. In this way, by providing two slots 331, the periphery of the mounting plate 2 can be locked to limit different positions of the mounting plate 2, thereby helping to improve the limiting effect of the first limiting structure 31.
[0047] In one embodiment of the present invention, the slot 331 has a bottom wall opposite to its opening, and the bottom wall of the slot 331 abuts against the peripheral side of the mounting plate 2, so as to provide a clamping force along the extension direction of the mounting plate 2, so that the two slots 331 can clamp the mounting plate 2, thereby helping to improve the fixing effect of the fixing structure 100.
[0048] In one embodiment of this utility model, please refer to Figure 1 and Figure 2 The mounting base 1 includes a base body 11 and a mounting protrusion 12 disposed on the base body 11. A slot 331 is disposed at the end of the mounting protrusion 12 away from the base body 11. Thus, the mounting protrusion 12 is provided to facilitate the placement of the slot 331. Furthermore, there are various connection methods between the mounting protrusion 12 and the base body 11. The mounting protrusion 12 and the base body 11 can be connected by adhesive bonding, screws, etc. This invention does not limit this. Specifically, in this embodiment, the mounting protrusion 12 is detachably mounted to the base body 11. Thus, a detachable connection structure is adopted to facilitate the installation and removal of the mounting protrusion 12. It is understood that there are various detachable connection structures, such as bolt connections or snap-fit connections, etc. This invention does not limit this.
[0049] In one embodiment, the mounting protrusion 12 includes a mounting rib that is detachably mounted to the seat body 11. This mounting rib facilitates assembly and disassembly, and also facilitates the setting of the slot 331. Furthermore, multiple mounting ribs are provided, spaced apart from each other on the seat body 11. This arrangement of mounting ribs allows for the setting of multiple slots 331, thereby improving the limiting effect of the first limiting structure 31.
[0050] In one embodiment of this utility model, please refer to Figure 2 The mounting protrusion 12 is provided with a guide slope 121 at one end away from the base body 11. In this way, by setting the guide slope 121, the mounting plate 2 is guided to move towards the middle of the two mounting protrusions 12 when it is installed along its thickness direction, so as to facilitate the installation of the mounting plate 2 along its thickness direction.
[0051] To limit the movement of the mounting plate 2 in its extension direction, in one embodiment of this utility model, please refer to... Figure 1 and Figure 2 In the second limiting structure 32, the limiting part 33 is configured as a limiting post 332 extending along the thickness direction of the mounting plate 2. Correspondingly, the mating part is configured as a mating hole. Thus, by providing mutually mating limiting posts 332 and mating holes, the translational movement of the mounting plate 2 in its extension direction is restricted. Furthermore, the shapes of the limiting posts 332 and the mating holes can be varied, for example, they can be circular, rectangular, etc., and can be adjusted as needed. This utility model does not limit this.
[0052] It should be noted that there are multiple types of the second limiting structure 32. In another embodiment, the second limiting structure 32 includes two clamping structures, one of which is arranged along a first direction and the other along a second direction. The first direction and the second direction are orthogonal. The limiting part 33 includes the clamping structure, and the mating part includes the periphery of the mounting plate 2. In this way, by providing two clamping structures, the movement of the mounting plate 2 in its extension direction is restricted.
[0053] Furthermore, the number of limiting posts 332 can be one or more, and this utility model does not limit this. Specifically, in this embodiment, the limiting posts 332 and the mating holes are configured as limiting groups, and multiple limiting groups are provided. The multiple limiting posts 332 are spaced apart along the extension direction of the mounting plate 2. In this way, by setting multiple limiting groups, the rotation of the mounting plate 2 is restricted, thereby preventing the mounting plate 2 from deflecting. Of course, in other embodiments, the limiting posts 332 and the mating holes can also be rectangular, etc., and this utility model does not limit this.
[0054] In one embodiment of this utility model, please refer to Figure 1 The limiting post 332 includes a first limiting segment with a larger cross-section and a second limiting segment with a smaller cross-section to form a positioning step surface 3321 for abutting against the mounting plate 2. Since the mounting plate 2 is large in size, its middle part may deform. Therefore, the positioning step surface 3321 is provided to abut against the mounting plate 2 to support the mounting plate 2 and prevent the mounting plate 2 from bending.
[0055] In one embodiment of this utility model, please refer to Figure 1 and Figure 4 The fixing structure 100 also includes a circuit board assembly 4, which is connected to the mounting plate 2 via a threaded connection structure. In this way, the mounting plate 2 is directly connected to the circuit board assembly 4, which not only allows the circuit board assembly 4 to be installed on the mounting base 1, but also facilitates subsequent maintenance or replacement.
[0056] In one embodiment of this utility model, please refer to Figure 1 and Figure 2 The fixing structure 100 also includes a heat sink 5 disposed on the mounting base 1. Thus, by providing the heat sink 5, heat within the inverter can be dissipated in a timely manner. Furthermore, there are various ways to connect the heat sink 5 to the mounting base 1. The heat sink 5 can be fixed to the mounting base 1 by screws or by adhesive, etc. This invention does not limit this. Specifically, in this embodiment, the mounting base 1 is provided with a receiving groove, and the heat sink 5 is snapped into the receiving groove. Thus, by providing the receiving groove, the heat sink 5 can be snapped into the mounting base 1, facilitating assembly and disassembly.
[0057] It should be noted that the two related technical features mentioned above, namely "the fixing structure 100 further includes a circuit board assembly 4" and "the fixing structure 100 further includes a heat sink 5 disposed on the mounting base 1", can be either selected or provided simultaneously, and this utility model does not limit this.
[0058] In one embodiment of this utility model, please refer to Figure 3 and Figure 4 The fixing structure 100 also includes a mounting bracket 6 disposed between the circuit board assembly 4 and the mounting plate 2. In this way, by setting the mounting bracket 6, the circuit board assembly 4 is isolated from the heat sink 5, preventing dust and other impurities in the gas from falling into the circuit board assembly 4.
[0059] In one embodiment of this utility model, please refer to Figures 2 to 4 The mounting bracket 6 is provided with a clearance groove, and the mounting plate 2 is provided with a mounting post 21. The mounting post 21 is provided with a fixing hole and can pass through the clearance groove to abut against the circuit board assembly 4. The threaded connection structure includes a threaded connector 7 threaded through the fixing hole. Thus, by providing the mounting post 21, it is convenient to set the fixing hole to cooperate with the threaded connector 7 to fasten the circuit board assembly 4 to the mounting plate 2. On the other hand, it can control the distance between the circuit board assembly 4 and the mounting plate 2 to prevent deformation of the fastening point of the mounting plate 2 due to excessive tightening of the threaded connector 7.
[0060] To achieve the above objectives, this utility model also proposes a frequency converter, which includes a fixed structure 100. The specific structure of the fixed structure 100 is as described in the above embodiments. Since this frequency converter adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0061] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A fixing structure for a frequency converter, characterized by The fixing structure comprises: a mounting seat; a mounting plate provided with a capacitor; and at least two limiting structures, each of which comprises a limiting part and a cooperating part, one of which is provided on the mounting seat and the other of which is provided on the mounting plate, the at least two limiting structures comprising a first limiting structure and a second limiting structure, the first limiting structure being used to limit the movement of the mounting plate along its thickness direction, and the second limiting structure being used to limit the movement of the mounting plate along its extension direction.
2. The fixing structure according to claim 1, wherein The mounting seat is provided with a clamping groove for clamping the periphery of the mounting plate. In the first limiting structure, the limiting part comprises a clamping groove, and the cooperating part comprises the periphery of the mounting plate.
3. The fixing structure according to claim 2, wherein The clamping groove is provided with two slots which are oppositely arranged.
4. The fixing structure according to claim 3, wherein The clamping groove is provided with a bottom wall opposite to the slot, and the bottom wall of the clamping groove abuts against the peripheral side surface of the mounting plate.
5. The fixing structure according to claim 2, wherein The mounting seat comprises a seat body and a mounting protrusion provided on the seat body. The clamping groove is provided on the end of the mounting protrusion away from the seat body.
6. The fixing structure according to claim 5, wherein The end of the mounting protrusion away from the seat body is provided with a guide inclined surface.
7. The fixing structure according to claim 1, wherein In the second limiting structure, the limiting part is provided as a limiting column extending along the thickness direction of the mounting plate, and the cooperating part is provided as a cooperating hole.
8. The fixing structure according to claim 7, wherein The limiting column and the cooperating hole are provided one by one as a limiting group, and a plurality of limiting groups are provided along the extension direction of the mounting plate.
9. The fixing structure according to claim 7, wherein The limiting column comprises a first limiting section with a larger cross section and a second limiting section with a smaller cross section to form a positioning step surface for abutting against the mounting plate.
10. The fixing structure according to claim 1, wherein The fixing structure further comprises a circuit board assembly connected with the mounting plate through a threaded connection structure; and / or The fixing structure further comprises a heat sink provided on the mounting seat.
11. The fixing structure according to claim 10, wherein The fixing structure further comprises a mounting bracket provided between the circuit board assembly and the mounting plate.
12. The fixing structure according to claim 11, wherein The mounting bracket is provided with a clearance slot, and the mounting plate is provided with a mounting column provided with a fixing hole and capable of abutting against the circuit board assembly through the clearance slot. The threaded connection structure comprises a threaded connecting piece threaded through the fixing hole.
13. A frequency converter, characterized in that The fixing structure comprises the fixing structure according to any one of claims 1 to 12.