Grounding structure for control box of pump

Abstract

The utility model discloses a kind of control box grounding structure for pump, belong to pump grounding field.The utility model includes base and control box, control box includes the first box body installed in the axial end portion of base, inside installation has drive board one, outside cover is equipped with metal first box cover;Second box body is installed in the radial outer side of base, inside installation has drive board two;Connecting metal piece is fixedly connected with the first box body and base end portion, and the both ends of connecting metal piece respectively contact first box cover and base to realize electric conduction;Grounding metal piece is fixedly connected with base end portion in the first box body, and is connected with the grounding terminal on drive board two.The utility model simultaneously realizes the grounding of base and first box cover by a ground wire, need not be respectively set ground line, grounding structure is simple and reliable, saves parts and installation cost.

Description

Technical Field

[0001] This utility model relates to the field of pump grounding technology, and more specifically, to a grounding structure for a pump control box. Background Technology

[0002] Pumps, as general-purpose devices that convert mechanical energy into fluid kinetic energy, have extremely wide applications. The core drive unit of a pump is usually an electric motor, and its stable and safe operation is crucial. Therefore, modern pump systems are generally equipped with integrated control boxes for precise control and protection of the motor, while reliable grounding is the cornerstone for ensuring personal safety and stable equipment operation.

[0003] A control box typically consists of a control box body and a cover. In practice, both the motor base and the control box cover are sometimes made of metal, and both require a grounding wire connected to the driver's grounding terminal to achieve grounding. Currently, the industry standard is to fix the control box body to the motor housing with screws, and then fix the control box cover to the control box body with screws. This installation and disassembly method is cumbersome and inefficient. Furthermore, the base and cover each require separate grounding wires connected to the driver's grounding terminal, making this double-wire, double-connection grounding method redundant and unreliable. The grounding structure is also complex and costly. Therefore, improving grounding installation efficiency, reducing costs, and achieving reliable grounding in a simpler way is of significant practical importance. Utility Model Content

[0004] 1. Technical problem to be solved by the utility model In view of the complex and cumbersome grounding structure in the existing technology, this utility model proposes to provide a grounding structure for a pump control box. By adapting and adjusting the control box structure and grounding method, the grounding structure can be effectively simplified, achieving simple and reliable grounding and reducing installation costs.

[0005] 2. Technical Solution To achieve the above objectives, the technical solution provided by this utility model is as follows: This utility model discloses a grounding structure for a pump control box, including a base and a control box, wherein the control box includes: The first box body is installed at the axial end of the machine base, and a drive plate is installed inside. The outer cover is made of metal. The second housing is installed on the radial outer side of the base, and a second drive board that is electrically connected to the first drive board is installed inside. A connecting metal part is used to fix the first box body to the end of the base, and the two ends of the connecting metal part contact the first box cover and the base respectively to achieve electrical conduction; The grounding metal component is located inside the first housing and is fixedly connected to the end of the base, and its other end is connected to the grounding terminal on the second drive board.

[0006] Furthermore, the base end is provided with multiple protruding fixed mounting posts, the bottom of the first box body is provided with multiple connection mounting holes, and the drive plate and the first box cover are provided with through holes. The connecting metal parts pass through the first box cover, the drive plate and the first box body along the axial direction and are fixedly connected to the fixed mounting posts.

[0007] Furthermore, the end of the base is provided with a protruding grounding mounting post, and the bottom of the first housing is provided with a corresponding grounding mounting hole, through which the grounding metal part passes and is fixedly connected to the grounding mounting post.

[0008] Furthermore, the extension height of the fixed mounting post on the base is greater than the extension height of the grounding mounting post.

[0009] Furthermore, both the connecting metal parts and the grounding metal parts are secured with fixing bolts.

[0010] Furthermore, both drive board one and drive board two are equipped with electronic control components, and the low-voltage modules are mainly distributed on drive board one, while the high-voltage modules are mainly distributed on drive board two.

[0011] Furthermore, the first box and the second box are integrally formed, and a connecting cavity is provided between them. The grounding metal part is connected to the grounding terminal on the second drive board through the grounding wire harness, and the grounding wire harness passes through the connecting cavity.

[0012] Furthermore, the first box body is provided with a stepped column, and a connection and installation hole is formed in the stepped column. The stepped column supports and passes through the drive plate and then abuts against the first box cover. The connecting metal part passes through the first box cover and the stepped column and is fixedly connected to the fixed installation column.

[0013] Furthermore, the first box is a circular box with a cross-section that matches the shape of the machine base's outline cross-section, and the outline cross-section of the first box does not extend beyond the axial end face of the machine base.

[0014] Furthermore, the bottom surface of the second box is an arc-shaped bottom surface that matches the circumferential wall surface of the base, and an axially extending guide limiting part is provided between the bottom surface of the second box and the circumferential wall surface of the base.

[0015] 3. Beneficial effects Compared with the prior art, the technical solution provided by this utility model has the following advantages: (1) The grounding structure of this utility model uses connecting metal parts to fix the first box body and the base at the same time, so that the two form a connected conductor. Then, one end of the grounding metal part is fixedly connected to the end of the base, and the other end is connected to the grounding terminal on the second drive board through the grounding wire harness. The whole is grounded through a single grounding wire, and the base and the first box cover are grounded at the same time. There is no need to set up separate grounding lines. The grounding structure is simple and reliable, saving parts and installation costs.

[0016] (2) The grounding structure of this utility model adopts a double box and a double drive board form of the control box, which is compact and improves the problem of pump body being difficult to install and space being limited due to the large size of the control box. It can also integrate the high power module and the low power module on different drive boards, effectively avoiding the problem of mutual interference between high power and low power components, effectively and safely separating them, and ensuring safe operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assembly structure of the control box and the base in the embodiment; Figure 2 This is a cross-sectional view of the control box and the base in the embodiment; Figure 3 This is a schematic diagram of the control box in the embodiment; Figure 4 This is a schematic diagram of the base structure in the embodiment; Figure 5 This is a schematic diagram of the pump unit in the embodiment; Figure 6 This is a cross-sectional view of the control box and base in the embodiment, from another perspective.

[0018] Explanation of the labels in the diagram: 100. First box body; 110. First box cover; 120. Connecting metal part; 130. Grounding metal part; 140. Grounding wire harness; 150. Driver board one; 101. Connecting mounting hole; 102. Grounding mounting hole; 200. Second housing; 210. Second housing cover; 220. Driver board two; 230. Power cable interface; 240. Signal cable interface; 300, Base; 301, Fixed mounting post; 302, Grounding mounting post. Detailed Implementation

[0019] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0020] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. The terms "first," "second," "third," and "fourth" should also be interpreted broadly, merely distinguishing feature names and not indicating a specific sequential relationship. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The present invention will be further described below with reference to the embodiments.

[0023] Example Combination Figures 1-6 As shown, a grounding structure for a pump control box in this embodiment includes a base 300 and a control box, wherein the control box includes: The first box body 100 is installed at the axial end of the base 300, and a drive plate 150 is installed inside. The outer cover is a first box cover 110 made of metal. The second housing 200 is installed on the radial outer side of the base 300, and a second drive board 220 electrically connected to the first drive board 150 is installed inside it; furthermore, in practice, the outer side of the second housing 200 is also provided with a power cord interface 230 electrically connected to the second drive board 220, and a signal line interface 240 electrically connected to the second drive board 220, and the signal line interface 240 is preferably located on the same side as the power cord interface 230; the second housing 200 is also covered with a second housing cover 210. The connecting metal part 120 is used to fix the first box body 100 to the end of the base 300, and the two ends of the connecting metal part 120 contact the first box cover 110 and the base 300 respectively. The connecting metal part 120 is used to realize the electrical conduction between the first box cover 110 and the base 300. In practice, the connecting metal part 120 can be a fixing bolt, or other metal part connection structures can be used as needed. The grounding metal component 130 is located inside the first housing 100 and is fixedly connected to the end of the base 300. The other end is connected to the grounding terminal on the second drive board 220. Specifically, it can be connected to the grounding terminal on the second drive board 220 through the grounding wire harness 140. In practice, the grounding metal component 130 can be fixed with a bolt, or other metal component connection structures can be used as needed. In this application, the grounding metal component 130 is used to realize the electrical conduction relationship between the base 300 and the grounding terminal, and effectively grounding.

[0024] This embodiment adopts a combination of a dual-box and dual-drive board configuration, with the two boxes installed in different directions on the base 300. This effectively reduces the volume occupied by a single drive board and control box, resulting in a compact structure. It also improves the problem of difficult pump installation and high space limitations caused by an excessively large control box, enhancing the pump's adaptability to installation in confined spaces. Secondly, based on the dual-box arrangement, the drive board 150 is installed at the axial end, and the drive board 150 is equipped with the main power control module. The corresponding metal first box cover 110 can effectively dissipate heat from the power control module. Both the metal first box cover 110 and the metal base 300 need to be reliably grounded.

[0025] In this embodiment, the grounding structure firstly uses a connecting metal part 120 to fix the first box 100 to the base 300, while using the metal material to achieve electrical conductivity between the first box cover 110 and the base 300, forming a continuous conductor. Then, a grounding metal part 130 is used, with one end fixedly connected to the end of the base 300 and the other end connected to the grounding terminal on the second drive board 220 via a grounding wire harness 140, to achieve reliable grounding of the base 300. Utilizing the electrical conductivity of the connecting metal part 120, the entire structure is also grounded through a single grounding wire, eliminating the need to set separate grounding lines for the base 300 and the first box cover 110. The grounding structure is simple and reliable, saving on parts and installation costs. In this embodiment, the connecting metal part 120 simultaneously achieves a fixed connection between the first box cover 110 and the first box body 100, between the first box body 100 and the base 300, and between the first box cover 110 and the base 300. No additional fixing parts are needed between the first box cover 110 and the first box body 100, and the first box body 100 can be removed and opened simply by disassembling the connecting metal part 120, which will not cause unnecessary damage or destruction to the parts, reduce costs, and make disassembly and assembly convenient.

[0026] Furthermore, in this embodiment, both drive board 150 and drive board 220 are equipped with electronic control components. The low-voltage modules are mainly distributed on drive board 150, while the high-voltage modules are mainly distributed on drive board 220. In practice, high-voltage modules generally include common-mode inductor modules, electrolytic capacitor modules, varistor modules, thermistor modules, relay modules, power terminals, power control modules, etc., while low-voltage modules generally include switching power supply circuit modules, chip modules, LED modules, gear shift button modules, etc., which will not be elaborated further. This embodiment utilizes different housings to integrate the high-voltage and low-voltage modules onto different drive boards, effectively improving the safety and reliability of the pump's operation.

[0027] Traditional drive board designs in the industry often employ a fully integrated layout. The components on the drive board include both high-voltage, high-current high-power modules and low-voltage, low-current low-power modules. To prevent high-voltage breakdown, arcing, and reduce electromagnetic interference, sufficient electrical clearance and creepage distance must be ensured between the high-power and low-power circuits. Designers must reserve a large isolation area between the high-power and low-power areas, which directly results in a larger drive board size. Consequently, the control box must have a correspondingly larger internal space and external volume, leading to significant limitations in the space required for pump installation.

[0028] This embodiment utilizes the cooperation of driver board 120 and driver board 220 to further achieve the separate arrangement of high-voltage and low-voltage modules in different housings, effectively avoiding the problem of mutual interference between high-voltage and low-voltage components, ensuring effective and safe separation, and guaranteeing operational safety. It should be noted that in this embodiment, driver board 120 mainly houses low-voltage modules, while driver board 220 mainly houses high-voltage modules. This achieves effective separation of most high-voltage and low-voltage modules. Furthermore, due to the cooperation of the two driver boards, the number of modules installed on each driver board is reduced, and the space for the required components on a single driver board remains relatively sufficient. Without increasing the size of the driver board, there is also sufficient safe distance to allow some high-voltage and low-voltage modules to coexist. Therefore, in practice, a small number of high-voltage modules can coexist on driver board 120, and a small number of low-voltage modules can coexist on driver board 220.

[0029] In practice, the power control module is still located on the drive plate 120 distributed at the axial end. Therefore, a metal first cover 110 is provided on the first housing 100. The first cover 110 has a metal heat dissipation protrusion corresponding to the position of the power control module. This protrusion can quickly and effectively dissipate heat from the power control module through thermally conductive adhesive, improving heat dissipation efficiency. Based on this, the grounding structure of this embodiment is adopted to achieve integrated conductive grounding of the first cover 110 and the base 300. In practice, a grounding spring can also be provided on the drive plate 120, which contacts the first cover 110 to achieve grounding conductivity.

[0030] Regarding the specific mounting structure of the base 300 and the first cover 110, the choice is as follows: Figure 3 and Figure 4As shown, the base 300 has multiple protruding mounting posts 301 at its end, and the bottom of the first housing 100 has multiple connecting mounting holes 101. The drive plate 150 and the first cover 110 are both provided with through holes. The connecting metal part 120 is set according to the corresponding holes, and passes through the first cover 110, the drive plate 150 and the first housing 100 in sequence along the axial direction, and is fixedly connected to the mounting posts 301 to achieve fixed assembly with the base 300. The first cover 110 is fixedly assembled with the first housing 100, and the first cover 110 is used to press the drive plate 150 simultaneously to ensure the stability of the position of the drive plate 150.

[0031] More accurately, combining Figure 6 As shown, further, the bottom of the first box body 100 is provided with an inwardly extending stepped column, and a stepped connection mounting hole 101 is formed in the stepped column. The stepped column supports and passes through the drive plate 150 and abuts against the first box cover 110. The connecting metal part 120 passes through the first box cover 110 and the stepped column and is fixedly connected to the fixed mounting column 301. Specifically, the fixed mounting post 301 has a threaded hole, which is embedded in the connecting mounting hole 101 inside the stepped post and is effectively limited at the top by the stepped hole. The stepped post has an axially extending limiting rib on its outer periphery that can support the drive plate 150. After the top of the stepped post passes through the drive plate 150, the limiting rib can effectively limit the drive plate 150. The top of the stepped post abuts against the first cover 110. Then, a fixing bolt passes through the first cover 110 and the stepped post axially and is finally threadedly fastened to the fixed mounting post 301. Multiple components can be fastened together with a single fixing bolt. The structure is simple and easy to assemble and disassemble.

[0032] Regarding the specific connection between the grounding metal component 130 and the base 300, furthermore, the end of the base 300 is provided with a protruding grounding mounting post 302, and the bottom of the first housing 100 is correspondingly provided with a grounding mounting hole 102. The grounding metal component 130 passes through the grounding mounting hole 102 and is fixedly connected to the grounding mounting post 302. Figure 6 As shown, a threaded hole is provided in the grounding mounting post 302. The grounding mounting post 302 passes through the grounding mounting hole 102 and is embedded inside the first box 100. It is fastened to the grounding mounting post 302 by a fixing bolt. A grounding wire harness 140 is connected to the fixing bolt and is connected to the grounding terminal on the second drive board 220 through the grounding wire harness 140.

[0033] Furthermore, in practice, the extension height of the fixed mounting post 301 on the base 300 is greater than the extension height of the grounding mounting post 302. The grounding mounting post 302 only needs to extend into the first housing 100 and be securely connected to the grounding metal part 130, while the fixed mounting post 301 needs to extend to a higher height, both to achieve axial limiting using the stepped post and to achieve a stable and reliable connection with the connecting metal part 120.

[0034] Furthermore, in practice, the first box 100 and the second box 200 are preferably injection molded as a single unit, which is convenient for processing. A connecting cavity is provided between the two, through which the grounding wire harness 140 passes. One end is connected to the grounding metal part 130, and the other end is connected to the grounding terminal on the drive board 220.

[0035] Furthermore, the first housing 100 is preferably a circular housing with a cross-section that matches the outline cross-section of the base 300, and the outline cross-section of the first housing 100 does not extend beyond the axial end face of the base 300 to avoid obstructing the fastening installation of the base 300. Specifically, refer to... Figure 5 As shown in the diagram, when the base 300 and the pump casing structure at the rear end are disassembled and fixed using the bolts at the four corners, the axial disassembly and assembly direction of the bolts will not be obstructed by the first box 100 at the end. The base 300 and the pump casing structure can be disassembled and assembled directly without disassembling the first box 100.

[0036] Furthermore, the second box 200 can be a box with a rectangular cross-section, as shown in the reference. Figure 1 and Figure 2 As shown, the bottom surface of the second housing 200 is preferably an arc-shaped bottom surface that adapts to the circumferential wall surface of the base 300, ensuring a good fit with the outer circumferential wall surface of the base 300. An axially extending guide and limiting portion is provided between the bottom surface of the second housing 200 and the circumferential wall surface of the base 300. During the installation of the entire control box, the guide and limiting portion is used to achieve pre-positioning and precise limiting of the second housing 200 and the base 300 along the axial direction. Then, the connecting metal part 120 is used to lock the base 300 to the first housing 100, ensuring the precise installation and connection strength of the entire control box.

[0037] The scope of protection of this utility model is defined only by the claims. Thanks to the teachings of this utility model, those skilled in the art will readily recognize that alternative structures to the disclosed structure can be used as feasible alternative implementations, and that the disclosed implementations can be combined to produce new implementations, which also fall within the scope of the appended claims.

Claims

1. A grounding structure for a pump control box, comprising a base (300) and a control box, characterized in that, The control box includes: The first box body (100) is installed at the axial end of the base (300), and a drive plate (150) is installed inside. The outer cover is a first box cover (110) made of metal. The second housing (200) is installed on the radial outer side of the base (300), and a second drive board (220) electrically connected to the first drive board (150) is installed inside. The connecting metal part (120) is used to fix the first box body (100) to the end of the base (300), and the two ends of the connecting metal part (120) contact the first box cover (110) and the base (300) respectively to achieve electrical conduction; The grounding metal part (130) is located inside the first housing (100) and fixedly connected to the end of the base (300), and the other end is connected to the grounding terminal on the second drive board (220).

2. The grounding structure for a pump control box according to claim 1, characterized in that: The base (300) has multiple protruding fixed mounting posts (301) at its end. The bottom of the first box (100) has multiple connecting mounting holes (101). The drive plate (150) and the first box cover (110) are both provided with through holes. The connecting metal part (120) passes through the first box cover (110), the drive plate (150), and the first box (100) along the axial direction and is fixedly connected to the fixed mounting posts (301).

3. The grounding structure for a pump control box according to claim 2, characterized in that: The base (300) has a protruding grounding mounting post (302) at the end, and the bottom of the first box (100) has a corresponding grounding mounting hole (102). The grounding metal part (130) passes through the grounding mounting hole (102) and is fixedly connected to the grounding mounting post (302).

4. The grounding structure for a pump control box according to claim 3, characterized in that: The extension height of the fixed mounting post (301) on the base (300) is greater than the extension height of the grounding mounting post (302).

5. The grounding structure for a pump control box according to claim 1, characterized in that: Both the connecting metal part (120) and the grounding metal part (130) are fixed with bolts.

6. The grounding structure for a pump control box according to claim 1, characterized in that: Both drive board one (150) and drive board two (220) are equipped with electrical control components. The low-voltage modules are mainly distributed on drive board one (150), and the high-voltage modules are mainly distributed on drive board two (220).

7. A grounding structure for a pump control box according to any one of claims 1-6, characterized in that: The first box (100) and the second box (200) are integrally formed, and a connecting cavity is provided between them. The grounding metal part (130) is connected to the grounding terminal on the second drive board (220) through the grounding wire harness (140), and the grounding wire harness (140) passes through the connecting cavity.

8. A grounding structure for a pump control box according to any one of claims 1-6, characterized in that: The first box body (100) has a stepped column inside, and a connecting mounting hole (101) is formed in the stepped column. The stepped column supports and passes through the drive plate (150) and then abuts against the first box cover (110). The connecting metal part (120) passes through the first box cover (110) and the stepped column and is fixedly connected to the fixed mounting column (301).

9. A grounding structure for a pump control box according to any one of claims 1-6, characterized in that: The first box (100) is a circular box with a cross-section that is consistent with the outline cross-section of the base (300), and the outline cross-section of the first box (100) does not extend beyond the axial end face of the base (300).

10. A grounding structure for a pump control box according to claim 7, characterized in that: The bottom surface of the second box (200) is an arc-shaped bottom surface that is adapted to the circumferential wall surface of the base (300), and an axially extending guide limiting part is provided between the bottom surface of the second box (200) and the circumferential wall surface of the base (300).

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