Electromagnetic shielding shell for driver

Abstract

A main shell comprises a first side plate, a second side plate and a third side plate, the second side plate and the third side plate are vertically bent along the two side edges of the first side plate respectively, a top plate is arranged at the top of the main shell and fixedly connected with a first opening in the top of the main shell, one side of the top plate is provided with an installation groove, and the installation groove is connected with the top of the main shell. The bottom plate is arranged at the bottom of the main shell and fixedly connected with a second opening in the bottom of the main shell, the main shell, the top plate, the bottom plate and the communication plate are connected to form a cavity structure with one closed side for containing a driver, and a heat dissipation opening is formed in the side, away from the first side plate, of the cavity structure and used for being communicated with a heat dissipation device. The main shell is conductively connected with the grounding end of the heat dissipation device; and the main shell, the top plate, the bottom plate and each connecting edge of the communication plate are conductively connected respectively. According to the shell provided by the embodiment of the invention, the electromagnetic shielding function of the driver can be effectively improved, and the whole shell has a better grounding effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of electromagnetic shielding, and in particular relates to an electromagnetic shielding shell for a driver. Background Art

[0002] During the operation of the servo system, the current movement in the wires inside the servo drive and the connecting cables will generate radiated electromagnetic fields. At the same time, the power transistors in the power supply part of the drive itself are in a state of continuous switching, the control part has a high-frequency clock, and the transient operations of electrical equipment such as the switching operation of the drive, power startup or shutdown, etc. will also produce corresponding voltage mutations and current mutations, thereby generating electromagnetic waves and causing electromagnetic interference to other devices. Electromagnetic interference can cause other devices to generate interference currents and interference voltages, resulting in errors and failures in the equipment, especially for precision electronic equipment such as medical equipment and aviation instruments. Electromagnetic interference may lead to more serious consequences. Secondly, electromagnetic interference can also cause signal interference to the communication system, reduce the quality of the received signal, and affect the communication quality and transmission speed. In addition, electromagnetic interference can also generate noise and electromagnetic wave radiation, posing potential risks to human health and quality of life. People who are in an electromagnetic interference environment for a long time may experience health problems such as anxiety and insomnia.

[0003] Under the existing technology, a plastic shell is often provided on the outside of the driver, but the electromagnetic shielding effect of the traditional plastic shell is poor, which can easily cause the driver to generate electromagnetic interference to other devices. At the same time, the traditional plastic shell has poor heat dissipation performance and poor overall strength, and cannot achieve the grounding and conductive effect of the internal components of the driver, which is not conducive to the stable and efficient operation of the driver. Utility Model Content

[0004] The utility model provides an electromagnetic shielding shell for a driver, so as to solve the technical problems that the electromagnetic shielding effect of the existing electromagnetic shielding shell is poor, the shell as a whole cannot fully realize grounding and conductivity, and the heat dissipation efficiency is poor.

[0005] To solve the above problems, the technical solution of the utility model is: an electromagnetic shielding shell for a driver, comprising: a main shell, a top plate, a bottom plate and a communication board respectively made of metal materials;

[0006] The main housing comprises a first side plate, a second side plate and a third side plate, wherein the second side plate and the third side plate are respectively vertically bent along the edges of both sides of the first side plate; the top plate is arranged at the top of the main housing, the lateral edge of the top plate is fixedly connected to the first open edge of the top of the main housing, and a mounting groove is arranged on one side of the top plate, wherein the mounting groove is used to assemble the communication board; the bottom plate is arranged at the bottom of the main housing, and the lateral edge of the bottom plate is fixedly connected to the second open edge of the bottom of the main housing;

[0007] The main housing, the top plate, the bottom plate and the communication board are connected to form a chamber structure with one side closed for placing the driver, and a heat dissipation port is formed on the side of the chamber structure away from the first side plate, and the heat dissipation port is used to connect to a heat dissipation device to dissipate heat for the driver;

[0008] The main shell is conductively connected to the grounding end of the heat dissipation device, and a plurality of relative grounding holes are respectively provided in the middle sections of each connecting edge of the main shell, the top plate, the bottom plate and the communication board. Grounding screws are respectively inserted into the grounding holes to respectively improve the conductive connection performance between the main shell and the top plate, the bottom plate and the communication board.

[0009] Preferably, the main shell, the top plate, the bottom plate and the communication board are all made of electrolytic sub-lead galvanized steel.

[0010] Preferably, grilles are respectively provided on the plate bodies of the top plate and the bottom plate, and the grilles are used to increase the air intake volume of the chamber structure.

[0011] Preferably, the edges where the top plate and the bottom plate are connected to the main shell are respectively provided with first flanges facing the side walls of the main shell, and the first flanges are respectively used to increase the contact area between the top plate and the bottom plate and the main shell;

[0012] The edges where the communication board is connected to the top plate and the main shell are respectively provided with second flanges facing the top plate body and the side wall of the main shell, and the second flanges are respectively used to increase the contact area between the communication board and the top plate and the main shell;

[0013] A third flange is provided on an edge of the main shell facing the heat dissipation device, and the third flange is used to increase the contact area between the main shell and the heat dissipation device.

[0014] Preferably, a plurality of relative fixing holes are respectively provided on the edge of the main shell and the first flange and the second flange, and fixing screws are respectively inserted into the fixing holes to respectively realize fixed connection between the main shell and the top plate, the bottom plate and the communication board.

[0015] Preferably, the thickness of the main housing, the top plate, the bottom plate and the communication board is limited to 0.85 mm to 1.0 mm.

[0016] Preferably, the plate body of the first side plate is provided with an LED screen display slot, a button slot, a serial communication slot, an encoder simulation output slot and an I / O wiring slot.

[0017] Preferably, a motor wiring slot is provided on the plate body of the top plate.

[0018] Preferably, a power connection slot is provided on the plate body of the bottom plate.

[0019] Preferably, a bus communication slot and an encoder slot are provided on the body of the communication board.

[0020] Due to the adoption of the above technical solution, the utility model has the following advantages and positive effects compared with the prior art:

[0021] (1) The utility model provides an electromagnetic shielding shell for a driver, the shell is made of electrolytic lead-galvanized steel, which can effectively reflect the electromagnetic waves generated by the driver inside the shell to prevent the electromagnetic waves from overflowing, especially forming an efficient electromagnetic shielding function for electromagnetic waves in the frequency range of 30 Hz to 100 Hz.

[0022] (2) The utility model provides an electromagnetic shielding shell for a driver, wherein the shell is composed of a main shell, a top plate, a bottom plate and a communication board. The connecting edges of adjacent plates are provided with flanges to increase the contact area between the connected plates, ensure the closed connection between the plates, and further improve the electromagnetic shielding effect.

[0023] (3) The utility model provides an electromagnetic shielding shell for a driver, wherein a plurality of grounding holes are respectively provided in the middle sections of the connecting edges of the main shell, the top plate, the bottom plate and the communication board, and grounding screws are inserted into the grounding holes to ensure that the connecting end faces of the main shell, the top plate, the bottom plate and the communication board are in full and tight contact, so that the entire shell of the driver can be grounded and conductive, effectively ensuring the electrical safety performance of the driver and preventing the driver from being damaged due to poor conductive connectivity of some parts of the shell in the event of leakage.

[0024] (4) The utility model provides an electromagnetic shielding shell for a driver, which is directly connected to a heat dissipation device on one side of the shell. Since the shell is made of metal material and a large-area grille is provided on the top plate and the bottom plate, the heat dissipation efficiency of the driver inside the shell is greatly improved, thereby ensuring stable and efficient operation of the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of the main housing provided by the utility model;

[0026] Figure 2 A structural schematic diagram b of the main housing provided by the utility model;

[0027] Figure 3 A schematic diagram of the structure of the top plate provided by the utility model;

[0028] Figure 4 A schematic diagram of the structure of the bottom plate provided by the utility model;

[0029] Figure 5 A structural schematic diagram of a communication board provided by the utility model.

[0030] Explanation of the accompanying drawings: 1: main shell; 2: first side panel; 3: second side panel; 4: third side panel; 5: top panel; 6: bottom panel; 7: communication board; 8: mounting slot; 9: grounding hole; 10: fixing hole; 11: first flange; 12: second flange; 13: third flange; 14: grille; 15: LED screen display slot; 16: button slot; 17: serial communication slot; 18: encoder simulation output slot; 19: I / O wiring slot; 20: motor wiring slot; 21: power wiring slot; 22: bus communication slot; 23: encoder slot. DETAILED DESCRIPTION

[0031] The electromagnetic shielding housing for a driver proposed by the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims.

[0032] See also Figures 1 to 5 This embodiment provides an electromagnetic shielding shell for a driver. The overall shell structure is composed of four parts: a main shell 1, a top plate 5, a bottom plate 6 and a communication board 7, which is convenient for the assembly of the driver and subsequent modular disassembly and maintenance. Among them, the main shell 1 includes a first side plate 2, a second side plate 3 and a third side plate 4. The second side plate 3 and the third side plate 4 are respectively bent vertically along the two side edges of the first side plate 2 to form a "U"-shaped structure. The structural design of the main shell 1 provides the main rigid support structure for the entire shell to ensure the rigid strength and stability of the shell. A top plate 5 is mounted at the first opening on the top of the main shell 1, and the lateral edge of the top plate 5 is fixedly connected to the first opening edge on the top of the main shell 1; a bottom plate 6 is mounted at the second opening on the bottom of the main shell 1, and the lateral edge of the bottom plate 6 is fixedly connected to the second opening edge on the bottom of the main shell 1; at the same time, a mounting groove 8 is provided on one side of the top plate 5, and the mounting groove 8 is used to mount a communication board 7; the specific shapes of the top plate 5, the bottom plate 6 and the communication board 7 can be adjusted according to the actual shape of the main shell 1 and the structure of the on-site equipment; by sequentially splicing the main shell 1, the top plate 5, the bottom plate 6 and the communication board 7, a relatively closed chamber structure on one side is constructed, and the interior of the chamber structure is used to place the driver; a relatively closed shell on one side is used to prevent the electromagnetic waves generated by the driver from overflowing and causing electromagnetic interference to external equipment.

[0033] The chamber structure of the shell forms a heat dissipation port on the side away from the first side plate 2. The shell is connected to the heat dissipation device through the heat dissipation port, and the heat dissipation device is connected to the driver through the heat dissipation port, thereby realizing the heat dissipation operation of the driver. After the shell is connected to the heat dissipation device, the chamber structure forms a relatively closed space.

[0034] The main housing 1 is conductively connected to the grounding end of the heat sink to achieve the grounding effect of the main housing 1. A number of relative grounding holes 9 are respectively provided in the middle sections of the connecting edges of the main housing 1, the top plate 5, the bottom plate 6 and the communication board 7. The grounding screws can be inserted into the grounding holes 9. The grounding holes 9 and the grounding screws are both made of conductive materials. By tightening the grounding screws, the connecting end faces of the main housing 1, the top plate 5, the bottom plate 6 and the communication board 7 are in full and tight contact, that is, the entire housing can be grounded and conductive. When leakage occurs inside the equipment, the leakage current can be quickly introduced into the grounding end of the heat sink through any component of the overall metal housing, effectively ensuring the electrical safety performance of the driver and preventing the driver from being damaged in the event of leakage.

[0035] Through this embodiment, a driver housing with electromagnetic shielding effect can be realized. The driver housing is made of metal material. By reflecting the electromagnetic waves generated by the driver inside the housing, the electromagnetic waves are prevented from overflowing, and the driver is prevented from generating electromagnetic interference to other devices. Compared with the traditional plastic housing, the metal housing used in this embodiment has better electromagnetic shielding effect and better overall structural strength, which can provide more stable structural support and ensure the safety of the driver's operating environment. Furthermore, in this embodiment, it is proposed to additionally set grounding holes 9 and grounding screws at the connection of each component to improve the tightness of the connection between each component, so that the housing as a whole has continuous conductive properties, that is, when the driver generates leakage current, grounding and conductivity can be achieved through any component of the housing. Compared with the existing driver housing, this embodiment has a better grounding effect.

[0036] Preferably, the main shell 1, top plate 5, bottom plate 6 and communication board 7 provided in this embodiment are all made of electrolytic sub-lead galvanized steel. The electrolytic sub-lead galvanized steel plate has excellent structural strength, and at the same time has excellent rust resistance and corrosion resistance, that is, it has stable conductivity, and when the outer shell forms a closed chamber, it can prevent the electromagnetic wave from overflowing and forming electromagnetic interference by reflecting the internal electromagnetic wave. After experimental demonstration, the outer shell made of electrolytic sub-lead galvanized steel in this embodiment has a high-efficiency electromagnetic shielding effect for electromagnetic waves in the low frequency band, especially in the frequency band of 30Hz to 100Hz.

[0037] Preferably, a large-area grille 14 is provided on the plate body of the top plate 5 and the bottom plate 6 provided in this embodiment, which becomes the air inlet of the chamber structure inside the shell, which can effectively increase the air intake received in the chamber structure when the heat dissipation device is in operation, and is helpful for the heat dissipation of the driver. At the same time, since the shell is made of metal material, it has good thermal conductivity, which can further improve the heat dissipation effect of the driver. It is worth noting that in the electromagnetic shielding shell for the driver provided in this embodiment, after the shell is assembled and assembled with the driver and other equipment on site, the top plate 5 is located at the top of the shell, and the bottom plate 6 is located at the bottom of the shell. At the same time, the grille 14 with a finer interval still has a certain reflection and blocking effect on electromagnetic waves. Therefore, according to field verification, after the electromagnetic waves generated by the driver overflow through the grille 14 of the top plate 5 and the bottom plate 6, they will not generate large electromagnetic interference to the electrical equipment arranged at the same level as the driver, and the electromagnetic interference intensity can be controlled within the specified range.

[0038] Preferably, the top plate 5 is provided with a first flange 11 facing the side wall of the main housing 1 at the edge connected to the main housing 1. Similarly, the bottom plate 6 is also provided with a first flange 11 facing the side wall of the main housing 1 at the edge connected to the main housing 1. The first flange 11 can increase the contact area between the top plate 5 and the bottom plate 6 when connected to the main housing 1, and prevent the gap between the connection end faces from causing electromagnetic waves to overflow. The communication board 7 is provided with a second flange 12 facing the board body of the top plate 5 at one edge connected to the top plate 5, and is also provided with a second flange 12 facing the side wall of the main housing 1 at the other edge connected to the main housing 1. The second flange 12 can increase the contact area between the communication board 7 and the top plate 5 and the main housing 1 when connected, and prevent electromagnetic waves from overflowing. The edge of the main housing 1 facing the heat dissipation device is provided with a third flange 13. When the main housing 1 is connected to the heat dissipation device, the third flange 13 can increase the contact area between the connection ends of the two, and can also prevent electromagnetic waves from overflowing through the heat dissipation port. By setting flanges at the connection ends of different components, the electromagnetic shielding effect of the entire housing can be effectively improved.

[0039] Preferably, a plurality of fixing holes 10 are provided on the edge of the main shell 1, and a plurality of fixing holes 10 corresponding to the fixing holes 10 on the edge of the main shell 1 are provided on the first flange 11 and the second flange 12, respectively. The fixing holes 10 of the first flange 11 and the second flange 12 can be arranged to overlap with the fixing holes 10 of the main shell 1, and fixing screws are respectively inserted into the fixing holes 10 to achieve a fixed connection between the main shell 1 and the top plate 5, the bottom plate 6 and the communication board 7. The screw fixation facilitates the installation and disassembly of the top plate 5, the bottom plate 6 and the communication board 7, and is convenient for assembly and subsequent maintenance and repair operations. It is worth noting that the fixation between different shell components can also be other fixing methods, such as sticking a rubber strip on the flange to achieve a fixed connection through gluing.

[0040] Preferably, the thickness of the main shell 1, top plate 5, bottom plate 6 and communication board 7 provided in this embodiment is limited to 0.85 mm to 1.0 mm, while the thickness of traditional plastic shells is generally 1.85 mm to 2.0 mm. Compared with traditional plastic shells, the shell provided in this embodiment is thinner, but has better electromagnetic shielding effect, heat dissipation capability and higher structural strength.

[0041] Preferably, the first side panel 2 provided in this embodiment is provided with an LED screen display slot 15, a button slot 16, a serial communication slot 17, an encoder simulation output slot 18 and an I / O wiring slot 19 on the body of the first side panel 2, which are used to assemble various functional interfaces of the driver, the top panel 5 is provided with a motor wiring slot 20 on the body of the top panel 5, which is used to assemble the motor wiring port of the driver, the bottom panel 6 is provided with a power wiring slot 21 on the body of the bottom panel 6, which is used to assemble the power interface of the driver, and the communication board 7 is provided with a bus communication slot 22 and an encoder slot 23 on the body of the communication board 7, which are used to assemble the bus communication interface and the encoder interface of the driver.

[0042] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. An electromagnetic shielding shell for a driver, characterized in that: include: A main housing, a top plate, a bottom plate and a communication board are respectively made of metal materials; The main housing comprises a first side plate, a second side plate and a third side plate, wherein the second side plate and the third side plate are respectively vertically bent along the edges of both sides of the first side plate; the top plate is arranged at the top of the main housing, the lateral edge of the top plate is fixedly connected to the first open edge of the top of the main housing, and a mounting groove is arranged on one side of the top plate, wherein the mounting groove is used to assemble the communication board; the bottom plate is arranged at the bottom of the main housing, and the lateral edge of the bottom plate is fixedly connected to the second open edge of the bottom of the main housing; The main housing, the top plate, the bottom plate and the communication board are connected to form a chamber structure with one side closed for placing the driver, and a heat dissipation port is formed on the side of the chamber structure away from the first side plate, and the heat dissipation port is used to connect to a heat dissipation device to dissipate heat for the driver; The main shell is conductively connected to the grounding end of the heat dissipation device, and a plurality of relative grounding holes are respectively provided in the middle sections of each connecting edge of the main shell, the top plate, the bottom plate and the communication board. Grounding screws are respectively inserted into the grounding holes to respectively improve the conductive connection performance between the main shell and the top plate, the bottom plate and the communication board.

2. The electromagnetic shielding housing for a driver according to claim 1, characterized in that: The main shell, the top plate, the bottom plate and the communication board are all made of electrolytic sub-lead galvanized steel.

3. The electromagnetic shielding housing for a driver according to claim 1, characterized in that: The top plate and the bottom plate are respectively provided with grilles, and the grilles are used to increase the air intake volume of the chamber structure.

4. The electromagnetic shielding housing for a driver according to claim 1, characterized in that: The edges where the top plate and the bottom plate are connected to the main shell are respectively provided with first flanges facing the side wall of the main shell, and the first flanges are respectively used to increase the contact area between the top plate and the bottom plate and the main shell; The edges where the communication board is connected to the top plate and the main shell are respectively provided with second flanges facing the top plate body and the side wall of the main shell, and the second flanges are respectively used to increase the contact area between the communication board and the top plate and the main shell; A third flange is provided on an edge of the main shell facing the heat dissipation device, and the third flange is used to increase the contact area between the main shell and the heat dissipation device.

5. The electromagnetic shielding housing for a driver according to claim 4, characterized in that: A plurality of opposite fixing holes are respectively arranged on the edge of the main shell and the first flange and the second flange, and fixing screws are respectively inserted into the fixing holes to respectively realize fixed connection between the main shell and the top plate, the bottom plate and the communication board.

6. The electromagnetic shielding housing for a driver according to claim 1, characterized in that: The thickness of the main housing, the top plate, the bottom plate and the communication board is limited to 0.85 mm to 1.0 mm.

7. The electromagnetic shielding housing for a driver according to claim 1, characterized in that: The plate body of the first side plate is provided with an LED screen display slot, a key slot, a serial communication slot, an encoder simulation output slot and an I / O wiring slot.

8. The electromagnetic shielding housing for a driver according to claim 1, characterized in that: The plate body of the top plate is provided with a motor wiring slot.

9. The electromagnetic shielding housing for a driver according to claim 1, characterized in that: A power connection slot is provided on the plate body of the bottom plate.

10. The electromagnetic shielding housing for a driver according to claim 1, characterized in that: A bus communication slot and an encoder slot are provided on the board body of the communication board.

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