Servo driver

Abstract

The servo driver comprises a heat dissipation base and a circuit board module arranged on the heat dissipation base, the circuit board module comprises a power board arranged above the heat dissipation base, a control board arranged above the power board and connected with the power board, and an interface board arranged above the control board and connected with the control board; wherein the control board is provided with a first extension part, a first interface unit is arranged on the first extension part, and the first extension part extends outwards from one end of the interface board. According to the utility model, on the basis of adopting a multi-layer laminated board scheme, the control board extends outwards to form the first extension part used for installing the first interface unit, and the height size of the first interface unit is greater than the distance between the control board and the interface board, so that the distance between the control board and the interface board can be reduced; therefore, the purpose of reducing the overall height of the driver is achieved.

Description

Technical Field

[0001] The utility model relates to the field of motion control, and particularly relates to a servo driver. Background Art

[0002] The servo driver is an important part of modern motion control, also known as a "servo controller" or "servo amplifier", and is widely used in automated equipment such as industrial robots and CNC machining centers. With the continuous development of technology, the requirements for miniaturization and microminiaturization of servo drivers are getting higher and higher.

[0003] Common servo drivers usually include a radiator, a control circuit board, a drive circuit board, various terminals and a product housing. The overall size of the servo driver is relatively large and requires a large installation space. The servo driver and the servo motor are products for supporting use. However, because the overall size of the servo driver is relatively large, it cannot be installed close to the servo motor well, resulting in long lengths of the drive signal cable and the encoder signal cable between the servo driver and the servo motor, and inconvenient connection. The signal transmission through a long cable will cause problems such as high cost, reduced performance, and increased EMC, thus affecting the overall system performance, safety, reliability, and usability.

[0004] To solve the above problems, in the prior art, the control circuit board is split into multiple small circuit boards and stacked in sequence to form a circuit board module, which reduces the size of the servo driver to a certain extent. However, because there are many circuit devices on the circuit board module and their sizes and heights are different, the multi-layer circuit module occupies a large space in the height direction. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a servo driver, aiming to solve the problem that the height size of the servo driver adopting the multi-layer stacked board scheme in the prior art is relatively large.

[0006] To solve the above technical problems, the purpose of the utility model is realized through the following technical solutions: providing a servo driver, including: a heat dissipation base and a circuit board module arranged on the heat dissipation base, where the circuit board module includes a power board arranged above the heat dissipation base, a control board arranged above and connected to the power board, and an interface board arranged above and connected to the control board; wherein, the control board has a first extension part, and a first interface unit is arranged on the first extension part, and the first extension part extends outward from one end of the interface board.

[0007] Further, the interface board has a second extension part, and a second interface unit is provided on the second extension part. The second extension part extends outward from one end of the control board, and the second extension part is one end of the interface board far from the first extension part or one end adjacent to the first extension part.

[0008] Further, the first interface unit includes at least one of a network communication interface and a USB interface. The second interface unit includes: a power interface. There is also a third interface unit in the area of the interface board except the second extension part. The third interface unit includes: an IO interface, an AI interface, an auxiliary power interface, and an encoder interface.

[0009] Further, a bus capacitor is connected to one side of the power board, and the bus capacitor is located on one side of the control board, the power board, and the heat dissipation base.

[0010] Further, an opening part is provided at the position of the heat dissipation base corresponding to the bus capacitor, and the bus capacitor is located between the second extension part and the opening part; at least one mounting part is respectively provided on two opposite side edges of the heat dissipation base, the mounting part is located below the first extension part and / or the second extension part, and a mounting avoidance part is provided at the position of the first extension part and / or the second extension part corresponding to the mounting part.

[0011] Further, the power board includes: an inverter drive module, a discharge module, a temperature sampling module, a current sampling module, an overcurrent sampling module, a voltage sampling module, and a power supply module.

[0012] Further, the control board includes: a CPU main control circuit module, a communication circuit module, an auxiliary power supply circuit module, and a USB circuit module.

[0013] Further, the interface board includes: a logic circuit module, an IO circuit module, an STO circuit module, an analog quantity circuit module, an encoder circuit module, and a display module.

[0014] Further, heat conducting bosses are provided on the heat dissipation base, and insulating heat conducting parts are provided between the heat conducting bosses and the power board; a plurality of power devices are provided at the positions of the power board facing away from the heat dissipation base corresponding to the heat conducting bosses.

[0015] Further, the servo driver further includes a protective cover plate and fixing parts. The protective cover plate is installed above the interface board through a plurality of fixing parts, and an opening is provided at the position of the protective cover plate corresponding to the interface unit.

[0016] The beneficial effects of the embodiments of the present utility model are as follows: On the basis of adopting a multi-layer laminated board solution, a first extension part for installing the first interface unit is extended outward from the control board. The height dimension of the first interface unit is greater than the distance between the control board and the interface board, so that the distance between the control board and the interface board can be reduced, thereby achieving the purpose of reducing the overall height dimension of the driver. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the overall structure of the servo driver provided by the embodiment of the present utility model.

[0019] Figure 2 It is an exploded structure schematic diagram of the servo driver provided by the embodiment of the present utility model.

[0020] Figure 3 It is a structural example diagram of a power module provided by the embodiment of the present utility model.

[0021] Figure 4 It is a structural example diagram of a control module provided by the embodiment of the present utility model.

[0022] Figure 5 It is a structural example diagram of an external interface module provided by the embodiment of the present utility model.

[0023] Explanation of the labels in the figure:

[0024] 1. Heat dissipation base; 11. Opening part; 12. Installation part; 13. Heat conduction boss;

[0025] 2. Power board; 21. Bus capacitor;

[0026] 3. Control board; 31. First extension part; 32. Network communication interface; 33. USB interface; 34. Installation avoidance part;

[0027] 4. Interface board; 41. Second extension part; 42. Second interface unit; 43. IO interface; 44. AI interface; 45. Auxiliary power interface; 46. Encoder interface;

[0028] 5. Protective cover plate. Detailed Embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0031] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0032] It should be further understood that the term "and / or" used in this specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0033] Please refer to Figure 1 and Figure 2 , the embodiments of the present invention provide a servo driver, including: a heat dissipation base 1 and a circuit board module disposed on the heat dissipation base 1. The circuit board module includes a power board 2 disposed above the heat dissipation base 1, a control board 3 disposed above the power board 2 and connected thereto, and an interface board 4 disposed above the control board 3 and connected thereto; wherein, the control board 3 has a first extension portion 31, and a first interface unit is provided on the first extension portion 31, and the first extension portion 31 extends outward from one end of the interface board 4.

[0034] In this embodiment, the original integral control circuit board is split into a power board 2, a control board 3, and an interface board 4 according to functions, and they are stacked in sequence on the heat dissipation base 1 to form a multi-layer circuit board module, making the overall structure of the servo drive more compact and miniaturized, effectively reducing the overall size of the servo drive. On this basis, in this embodiment, the control board 3 extends outward to form a first extension 31 for mounting on the first interface unit. The first interface unit is a device with a relatively high height dimension. If the first interface unit is located in the space between the control board 3 and the interface board 4, enough space needs to be reserved between the control board 3 and the interface board 4, which will affect the overall height dimension of the drive. Therefore, the control board 3 is designed to extend outward to form the first extension 31, and the first extension 31 does not overlap with the interface board 4 in the height direction. Therefore, the height at which the first interface unit is mounted on the first extension 31 can be greater than the distance between the control board 3 and the interface board 4, so as to reduce the distance between the control board 3 and the interface board 4, achieving the purpose of reducing the overall height dimension of the drive.

[0035] In one embodiment, the interface board 4 has a second extension 41, and a second interface unit 42 is provided on the second extension 41. The second extension 41 extends outward from one end of the control board 3. The second extension 41 is either the end of the interface board 4 far from the first extension 31 or the end adjacent to the first extension 31.

[0036] In this embodiment, the interface board 4 is located on the outermost layer of the circuit board module. A plurality of interfaces for external connection are provided on the interface board 4, and the interfaces with relatively large dimensions can be integrally designed as the second interface unit 42; a second extension 41 extends outward from one end of the control board 3 on the interface board 4, and the second interface unit 42 is arranged on the second extension 41.

[0037] Based on this, the first interface unit and the second interface unit 42 are respectively arranged on the first extension 31 and the second extension 41. To facilitate the connection of the first interface unit and the second interface unit 42 to the outside and improve the overall aesthetics, the positions of the first interface unit and the second interface unit 42 can be designed. For example, the first extension 31 and the second extension 41 extend on the opposite sides of the control board 3 and the interface board respectively. At this time, the first interface unit and the second interface unit 42 are symmetrically distributed; or for another example, the first extension 31 and the second extension 41 extend on the adjacent sides of the control board 3 and the interface board respectively. At this time, the first interface unit and the second interface unit 42 are vertically distributed; in this way, the first interface unit and the second interface unit 42 can be distributed in a parallel and symmetrical or perpendicular manner to each other, and there is no problem of mutual interference between them, which is convenient for their respective connections to the outside and the overall aesthetics is also improved.

[0038] In one embodiment, the first interface unit includes at least one of a network communication interface 32 and a USB interface 33.

[0039] In this embodiment, the network communication interface 32 includes any one of an EtherCAT communication interface, an RS485 communication interface, and a CANopen communication interface; the number of network communication interfaces 32 can be one or more (set according to actual requirements); the network communication interface 32 and the USB interface 33 are arranged side by side on the first extension part 31 in a direction perpendicular to the extension direction of the first extension part 31.

[0040] In one embodiment, the second interface unit 42 includes: a power interface; there is also a third interface unit in the area of the interface board 4 except for the second extension part 41, and the third interface unit includes: an IO interface 43, an AI interface 44, an auxiliary power interface 45, and an encoder interface 46.

[0041] In this embodiment, the power interface of the second interface unit 42 includes connection terminals for connecting the power supply and the motor, and each connection terminal is integrally arranged side by side on the second extension part 41 in a direction perpendicular to the extension direction of the second extension part 41. The third interface unit on the interface board 4 can be distributed in a centralized or decentralized manner in the area except for the second extension part 41, and can be specifically set according to actual requirements.

[0042] In one embodiment, a bus capacitor 21 is connected to one side of the power board 2, and the bus capacitor 21 is located on one side of the control board 3, the power board 2, and the heat dissipation base 1.

[0043] In this embodiment, the bus capacitor 21 generally has a long strip-shaped columnar structure and is a relatively large device on the circuit board, occupying a relatively large space. Therefore, the bus capacitor 21 is horizontally arranged on one side of the power board 2, so that the bus capacitor 21 is in the height space formed by the control board 3, the power board 2, and the heat dissipation base 1, without additionally occupying height space, and the overall volume is reduced to the greatest extent.

[0044] In one embodiment, an opening 11 is provided at the position of the heat dissipation base 1 corresponding to the bus capacitor 21, and the bus capacitor 21 is located between the second extension part 41 and the opening 11; at least one mounting part 12 is provided on opposite sides of the heat dissipation base 1, and the mounting part 12 is located below the first extension part 31 and / or the second extension part 41, and a mounting avoidance part 34 is provided at the position of the first extension part 31 and / or the second extension part 41 corresponding to the mounting part 12.

[0045] In this embodiment, the shape of the opening 11 on the heat dissipation base 1 is adapted to that of the bus capacitor 21, a part of the bus capacitor 21 is accommodated in the opening 11, and another part of the bus capacitor 21 is accommodated in the space on one side of the control board 3 and the power board 2, that is, the space below the second extension part 41.

[0046] In this embodiment, the mounting portions 12 on the opposite sides of the heat dissipation base 1 are used for the assembly of the entire servo driver. The mounting portions 12 may specifically be U-shaped grooves provided near the four corners of the heat dissipation base 1. The U-shaped grooves can cooperate with other mounting parts (such as bolts) to achieve the assembly of the entire servo driver. Since the heat dissipation base 1 is located at the bottommost position of the entire servo driver, the first extension portion 31 and / or the second extension portion 41 block the U-shaped grooves in the height direction. Therefore, mounting avoidance portions 34 (i.e., U-shaped avoidance openings) can be provided at the positions of the first extension portion 31 and / or the second extension portion 41 corresponding to the U-shaped grooves, so as to provide an avoidance space for the mounting parts to be assembled with the mounting portions 12 in the height direction.

[0047] In one embodiment, the power board 2 includes, but is not limited to, an inverter drive module, a discharge module, a temperature sampling module, a current sampling module, an overcurrent sampling module, a voltage sampling module, a power supply module, and other modules (for example Figure 3 the exemplary power board 2).

[0048] In one embodiment, the control board 3 includes, but is not limited to, a CPU main control circuit module, a communication circuit module, an auxiliary power supply circuit module, a USB circuit module, and other modules (for example Figure 4 the exemplary control board 3).

[0049] In one embodiment, the interface board 4 includes, but is not limited to, a logic circuit module, an IO circuit module, an STO circuit module, an analog quantity circuit module, an encoder circuit module, a display module, and other modules (for example Figure 5 the exemplary interface board 4).

[0050] In one embodiment, the heat dissipation base 1 is provided with heat conducting bosses 13, and an insulating heat conducting member is provided between the heat conducting bosses 13 and the power board 2. A plurality of power devices are provided at the positions of the power board 2 facing away from the heat dissipation base 1 corresponding to the heat conducting bosses 13.

[0051] The heat dissipation base 1 of this embodiment can adopt a metal base. The heat conducting bosses 13 can be convex structures integrally formed on the surface of the heat dissipation base 1. An insulating heat conducting member is provided between the heat conducting bosses 13 and the power board 2. The insulating heat conducting member is used to transfer the heat generated by the power devices on the power board 2 to the heat dissipation base 1, and at the same time insulate the heat conducting bosses 13 from the power board 2 to avoid the occurrence of an electric conduction phenomenon on the heat dissipation base 1.

[0052] In one embodiment, the servo driver further includes a protective cover plate 5 and fixing parts. The protective cover plate 5 is installed above the interface board 4 through a plurality of fixing parts. An opening is provided at the position of the protective cover plate 5 corresponding to the interface unit.

[0053] In this embodiment, the protective cover plate 5 is covered on the side of the interface board 4 facing away from the control board 3 (i.e., the outermost side of the entire servo driver). A plurality of openings can be provided at the top of the protective cover plate 5. The shapes and quantities of the openings correspond to those of the first interface unit, the second interface unit 42, and other interfaces, so as to facilitate the corresponding interface units to be exposed to the outside. The height dimension of the protective cover plate 5 is smaller than the height dimension of the highest interface unit provided on the circuit board. The setting of the protective cover plate 5 does not affect the overall dimension of the driver, and the driver has a larger dimension design space.

[0054] In some other embodiments, the heat dissipation base 1, the power board 2, the control board 3, and the interface board 4 can be connected through connecting columns. That is, the power board 2 is installed above the heat dissipation base 1 through a plurality of connecting columns, the control board 3 is installed above the power board 2 through a plurality of connecting columns, and the interface board 4 is installed above the control board 3 through a plurality of connecting columns. In this way, a multi-layer laminated board solution can be formed.

[0055] In some other embodiments, signal connectors and power connectors (i.e., power dynamic connectors and power input connectors) for mutual connection are provided between the power board 2, the control board 3, and the interface board 4.

[0056] In some other embodiments, the protective cover plate 5 can be fixedly installed on a plurality of connecting columns on the interface board 4 through a plurality of screws to ensure the stability of the protective cover plate 5.

[0057] As described above, the above are only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or replacements, and these modifications or replacements should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A servo drive, characterized in that: include: A heat dissipation base and a circuit board module disposed on the heat dissipation base, wherein the circuit board module comprises a power board disposed above the heat dissipation base, a control board disposed above the power board and connected thereto, and an interface board disposed above the control board and connected thereto; The control board has a first extension portion, and a first interface unit is arranged on the first extension portion, and the first extension portion extends outward from one end of the interface board.

2. The servo driver according to claim 1, characterized in that: The interface board has a second extension portion, and a second interface unit is arranged on the second extension portion, the second extension portion extends outward from one end of the control board, and the second extension portion is an end of the interface board away from the first extension portion or an end adjacent to the first extension portion.

3. The servo driver according to claim 2, characterized in that: The first interface unit includes at least one of a network communication interface and a USB interface, the second interface unit includes a power interface, and the interface board also has a third interface unit in addition to the area of ​​the second extended portion, and the third interface unit includes an IO interface, an AI interface, an auxiliary power supply interface, and an encoder interface.

4. The servo driver according to claim 2, characterized in that: One side of the power board is connected with a bus capacitor, and the bus capacitor is located on one side of the control board, the power board and the heat dissipation base.

5. The servo driver according to claim 4, characterized in that: An opening portion is provided at a position of the heat dissipation base corresponding to the position of the bus capacitor, and the bus capacitor is located between the second extension portion and the opening portion; at least one mounting portion is respectively provided on two opposite sides of the heat dissipation base, and the mounting portion is located below the first extension portion and / or the second extension portion, and an installation avoidance portion is provided at a position of the first extension portion and / or the second extension portion corresponding to the mounting portion.

6. The servo driver according to claim 1, characterized in that: The power board includes: an inverter drive module, a discharge module, a temperature sampling module, a current sampling module, an overcurrent sampling module, a voltage sampling module and a power supply module.

7. The servo driver according to claim 1, characterized in that: The control board includes: a CPU main control circuit module, a communication circuit module, an auxiliary power circuit module, and a USB circuit module.

8. The servo driver according to claim 1, characterized in that: The interface board comprises: a logic circuit module, an IO circuit module, an STO circuit module, an analog circuit module, an encoder circuit module and a display module.

9. The servo driver according to claim 1, characterized in that: A heat-conducting boss is arranged on the heat-dissipating base, and an insulating heat-conducting member is arranged between the heat-conducting boss and the power board; a plurality of power devices are arranged on a side of the power board away from the heat-dissipating base at a position corresponding to the heat-conducting boss.

10. The servo driver according to any one of claims 1 to 9, characterized in that: It also includes a protective cover plate and fixing parts. The protective cover plate is installed above the interface plate through a plurality of fixing parts. The protective cover plate is provided with an opening at a position corresponding to the interface unit.

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