Servo driver

Abstract

The utility model discloses a servo driver. The servo driver comprises a heat dissipation base and a circuit board module installed on the heat dissipation base. The servo driver further comprises a cover shell. The cover shell is fixedly connected with the side, away from the heat dissipation base, of the circuit board module, and the cover shell and the heat dissipation base define a containing space of the circuit board module. According to the servo driver, only the top of the cover shell needs to be connected with the circuit board module, the overall size design of the driver is not affected, the driver has a larger size design space, and the structural design of the cover shell has the advantages of being simple in structure, low in cost and convenient to disassemble and assemble.

Description

Technical Field

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

[0002] A 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, there are increasingly high requirements for the miniaturization and microminiaturization of servo drivers.

[0003] A microminiature servo driver has strict requirements for size. Existing microminiature servo drivers usually consist of a heat dissipation base and a circuit board module fixed on the heat dissipation base. In order to facilitate the layout and wiring operation of wiring terminals on the circuit board of the microminiature servo driver, the protective housing is omitted, or only a cover plate is provided on the top layer interface board. In many harsh industrial environments, the lack of a protective housing will reduce the protection performance of the microminiature servo driver and increase the maintenance cost of the driver.

[0004] To solve the influence brought by the lack of a protective housing in harsh industrial environments, when a protective housing is provided on the existing microminiature servo driver, the housing needs to be fixedly connected to the heat dissipation base, thus an additional connection structure needs to be designed, which is complex in structure, increases the design cost, and also increases the overall size of the driver. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a servo driver, aiming to solve the problems that the housing installation structure of the existing servo driver is complex and increases the overall size of the driver.

[0006] To solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions: providing a servo driver, the servo driver includes a heat dissipation base and a circuit board module installed on the heat dissipation base; the servo driver further includes a cover shell; the cover shell is fixedly connected to the side of the circuit board module away from the heat dissipation base, and the cover shell and the heat dissipation base enclose a receiving space for the circuit board module.

[0007] Further, the circuit board module is connected to the heat dissipation base through a plurality of positioning columns, the cover shell is connected to the circuit board module through a plurality of fixing members and the positioning columns, the positioning column includes an installation column, and a limiting column is integrally formed at one end of the installation column, and a fixing hole is arranged in the limiting column.

[0008] Further, through holes for the fixing members to pass through are arranged at positions corresponding to the limiting columns on the top of the cover shell.

[0009] Further, the fixing member includes a screw. The top end of the limiting post abuts against the cover shell, and the screw passes through the through hole and is threadedly connected to the fixing hole.

[0010] Further, the circuit board module includes a power board, a control board disposed above the power board, and an interface board disposed above the control board. The power board and the control board are connected by a plurality of the positioning posts, and the control board and the interface board are connected by a plurality of the positioning posts.

[0011] Further, a plurality of interface units are provided on the interface board and / or the control board, and openings are formed in the cover shell corresponding to the interface units.

[0012] Further, the height of the cover shell is less than the overall height required for the circuit board module to be installed on the heat dissipation base.

[0013] Further, the length and width dimensions of the heat dissipation base are not less than the length and width dimensions of the cover shell.

[0014] Further, mounting portions for assembling the servo driver extend from both ends in the length direction or the width direction of the heat dissipation base.

[0015] Further, the mounting portion includes a plurality of mounting openings distributed at a plurality of corner positions.

[0016] The beneficial effects of the embodiments of the present invention are as follows: It is only necessary to connect the top of the cover shell to the circuit board module, which does not affect the overall size design of the driver, and the driver has a larger size design space. The structural design of the cover shell has the advantages of simple structure, low cost, and convenient disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. 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 invention;

[0019] Figure 2 It is an installation schematic diagram of the cover shell provided by the embodiment of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the positioning post provided by the embodiment of the present invention.

[0021] Explanation of the reference numerals in the drawings:

[0022] 1. Heat dissipation base; 11. Installation part;

[0023] 2. Circuit board module; 21. Power board; 22. Control board; 23. Interface board; 24. Interface unit;

[0024] 3. Cover shell; 31. Through hole; 32. Opening;

[0025] 4. Positioning post; 41. Installation post; 42. Limiting post; 43. Fixing hole;

[0026] 5. Fixing part. Detailed implementation manner

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] 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.

[0029] It should also be understood that the terms used in this specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. As used in this specification of the present utility model and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0030] It should be further understood that the term " / and / " used in this specification of the present utility model 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.

[0031] Combined with Figure 1 and Figure 2 , an embodiment of the present utility model provides a servo driver, which includes a heat dissipation base 1, a circuit board module 2 installed on the heat dissipation base 1, and a cover shell 3; the cover shell 3 is fixedly connected to the side of the circuit board module 2 away from the heat dissipation base 1, and the cover shell 3 and the heat dissipation base 1 enclose a receiving space for the circuit board module 2.

[0032] In this embodiment, the installation method of the common cover 3 in the prior art is improved. In the prior art, the cover 3 is usually directly connected to the heat dissipation base 1 to enclose and protect the circuit board module 2. Although the protection effect is achieved, the enclosed space between the cover 3 and the heat dissipation base 1 is a fixed-size accommodation space, resulting in relatively limited overall dimension design of the circuit board module 2. Therefore, in this embodiment, the installation position of the cover 3 on the driver is improved. The cover 3 does not need to be connected to the heat dissipation base 1, but the top of the cover 3 is connected to the circuit board module 2, and there is no need to set a connection structure between the cover 3 and the heat dissipation base 1. In a specific implementation manner, the shape of the cover 3 is adaptively designed based on the overall shape of the circuit board module 2, so that the cover 3 can be tightly covered on the circuit board module 2. The top of the covered cover 3 is connected to the side of the circuit board module 2 facing away from the heat dissipation base 1, and the covered cover 3 and the heat dissipation base 1 just enclose the circuit board module 2, without affecting the overall dimension design of the driver, and the driver has a larger dimension design space. Such improvement makes the cover 3 have the advantages of simple structure, low cost, and convenient disassembly and assembly. It should be noted that the cover 3 and the heat dissipation base 1 can be exactly in contact with each other, or there can be a slight gap between them.

[0033] Combined with Figure 3 , in an embodiment, the circuit board module 2 is connected to the heat dissipation base 1 through a plurality of positioning posts 4, and the cover 3 is connected to the circuit board module 2 through a plurality of fixing members 5 and the positioning posts 4. The positioning post 4 includes an installation post 41, and a limiting post 42 is integrally formed at one end of the installation post 41, and a fixing hole 43 is provided in the limiting post 42.

[0034] In this embodiment, a plurality of plug-in portions are provided on the heat dissipation base 1, and plug-in holes are provided in the plug-in portions. The circuit board module 2 is plugged into the plug-in holes of the plurality of plug-in portions through a plurality of positioning posts 4, thereby achieving installation of the circuit board module 2. In a specific implementation, the plurality of positioning posts 4 can be distributed at the edge of the circuit board module 2, and each positioning post 4 includes an integrally formed mounting post 41 and a limiting post 42, wherein the outer diameter of the mounting post 41 is smaller than the outer diameter of the limiting post 42. A plurality of mounting holes are provided at the edge of the circuit board module 2, and the diameter of the mounting holes is larger than the outer diameter of the mounting post 41 and smaller than the outer diameter of the limiting post 42. The plurality of mounting posts 41 pass through the plurality of mounting holes one by one, and then are interference-fitted into the plug-in holes of the plurality of plug-in portions, and are pressed against the plurality of mounting holes by the plurality of limiting posts 42, thereby achieving stable installation of the circuit board module 2. Next, several limit columns 42 are now located on the side of the circuit board module 2 away from the heat dissipation base 1, and several positioning columns 4 (here refers to a new group of positioning columns 4, for the convenience of distinction, the following text is referred to as group A positioning columns 4) are used to be plugged into several positioning columns 4 on the circuit board module 2 (for the convenience of distinction, the following text is referred to as group B positioning columns 4) in a stacked manner, and then the cover shell 3 is closed on the circuit board module 2, and then the cover shell 3 is installed in the fixing holes 43 of the group A positioning columns 4 through several fixing parts 5, so that the cover shell 3 can be stably installed.

[0035] In one embodiment, a through hole 31 for the fixing member 5 to pass through is provided at a position on the top of the cover shell 3 corresponding to the limiting column 42 .

[0036] In this embodiment, after the cover shell 3 is closed on the circuit board module 2, the top end of the positioning column 4 of group A is supported on the inner side of the top of the cover shell 3, and a plurality of through holes 31 are provided at positions on the top of the cover shell 3 corresponding to the positioning columns 4 of group A. By passing a plurality of fixing members 5 through the plurality of through holes 31 one by one and fixing them one by one in the plurality of fixing holes 43 of the positioning columns 4 of group A, the stable installation of the cover shell 3 can be achieved.

[0037] In some specific implementations, the fixing member 5 includes a screw, and the top of the limiting column 42 of the positioning column 4 of group A abuts against the inner side of the top of the cover shell 3. The screw passes through the through hole 31 and is threadedly connected to the fixing hole 43 to achieve stable installation of the cover shell 3.

[0038] In some other specific implementations, the fixing member 5 may also be an expansion screw, a rivet or other structural member with a stable fixing effect.

[0039] In one embodiment, the circuit board module 2 includes a power board 21, a control board 22 arranged above the power board 21, and an interface board 23 arranged above the control board 22. The power board 21 and the control board 22 are connected by several positioning columns 4, and the control board 22 and the interface board 23 are connected by several positioning columns 4.

[0040] In this embodiment, the circuit board module 2 is designed in a split manner according to functions as a power board 21, a control board 22, and an interface board 23. The overall structure is more compact and the overall volume is more miniaturized, effectively reducing the size of the servo driver. To ensure the stability between the entire circuit board module 2 and the heat dissipation base 1, as well as the stability between the power board 21, the control board 22, and the interface board 23, a stacking method is adopted for layer-by-layer fixation.

[0041] In some specific implementation manners, according to the installation principle that the circuit board module 2 is installed on the heat dissipation base 1 through the group B positioning posts 4 in the foregoing embodiment, using the same installation principle, with the heat dissipation base 1 as the bottom plate, the power board 21 is installed on the heat dissipation base 1 through a group B positioning post 4, the control board 22 is installed on the power board 21 through a group B positioning post 4, and the interface board 23 is installed on the control board 22 through a group B positioning post 4; by stacking and fixing layer by layer in this way, the entire circuit board module 2 can be stably installed on the heat dissipation base 1.

[0042] In one embodiment, a plurality of interface units 24 are provided on the interface board 23 and / or the control board 22, and openings 32 are provided on the cover case 3 corresponding to the interface units 24.

[0043] In this embodiment, the edges of the interface board 23 and / or the control board 22 can extend outward, and a plurality of interface units 24 are provided at the extended positions. The interface units 24 need to be exposed and used for connection with external circuits. Therefore, after the cover case 3 covers the circuit board module 2, while protecting the circuit board module 2, it is also necessary to ensure that the interface units 24 can be exposed. Therefore, a plurality of openings 32 can be provided on the cover case 3, and the number and shape and size of the openings 32 can be adaptively designed according to the number and shape and size of the interface units 24.

[0044] In one embodiment, the height of the cover case 3 is less than the overall height required for the circuit board module 2 to be installed on the heat dissipation base 1.

[0045] In this embodiment, the interface units 24 at the top of the circuit board module 2 determine the overall height of the circuit board module 2. After the present application avoids these interface units 24 through the openings 32, the height dimension of the cover case 3 is less than the overall height required for the circuit board module 2 to be installed on the heat dissipation base 1, that is, it does not affect the overall size of the driver, and the driver has the advantage of miniaturization.

[0046] In one embodiment, the relatively high and externally exposed interface units 24 (or other functional modules) can be distributed at both ends of the circuit board module 2, and these interface units 24 protrude from the openings 32 on the cover case 3, making the thickness of the driver more aesthetically pleasing from the appearance.

[0047] In one embodiment, the length and width dimensions of the heat dissipation base 1 are not less than those of the cover 3; an installation portion 11 for assembling the servo drive extends in the length direction or width direction of the heat dissipation base 1.

[0048] Preferably, the width dimension of the heat dissipation base 1 can be the same as the width dimension of the cover 3, and the length of the heat dissipation base 1 is greater than the length of the cover 3, that is, the two ends of the heat dissipation base 1 extend in the length direction, and the installation portions 11 can be formed at both ends, and the installation portions 11 can facilitate the fixed installation of the entire servo drive. Specifically, the installation portion 11 can include a plurality of installation openings distributed at a plurality of corner positions, and the installation openings can cooperate with other fixing structures for fixed installation.

[0049] In some other embodiments, the heat dissipation base 1 serves as a bearing structure for the circuit board module 2 and also as a heat dissipation structure. The heat dissipation base 1 can adopt a metal base to facilitate the conduction of heat generated by the circuit board.

[0050] As described above, only the specific embodiments of the present invention are provided, 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 substitutions, and these modifications or substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A servo driver, characterized in that, The servo driver includes a heat dissipation base and a circuit board module mounted on the heat dissipation base; a cover shell; the cover shell is fixedly connected to the side of the circuit board module away from the heat dissipation base, and the cover shell and the heat dissipation base enclose a receiving space for the circuit board module.

2. The servo driver according to claim 1, wherein, The circuit board module is connected to the heat dissipation base through a plurality of positioning posts, the cover shell is connected to the circuit board module through a plurality of fixing members and the positioning posts, the positioning posts include mounting posts, and a limiting post is integrally formed at one end of the mounting post, and a fixing hole is provided in the limiting post.

3. The servo driver according to claim 2, characterized in that, Through holes for the fixing members to pass through are provided at positions corresponding to the limiting posts on the top of the cover shell.

4. The servo driver according to claim 3, characterized in that, The fixing member includes a screw, the top end of the limiting post abuts against the cover shell, and the screw passes through the through hole and is threadedly connected to the fixing hole.

5. The servo driver according to claim 2, characterized in that, The circuit board module includes a power board, a control board arranged above the power board, and an interface board arranged above the control board. The power board and the control board are connected through a plurality of the positioning posts, and the control board and the interface board are connected through a plurality of the positioning posts.

6. The servo driver according to claim 5, characterized in that, A plurality of interface units are provided on the interface board and / or the control board, and openings are provided on the cover shell corresponding to the interface units.

7. The servo driver according to any one of claims 1-6, characterized in that, The height of the cover shell is less than the overall height required for the circuit board module to be mounted on the heat dissipation base.

8. The servo driver according to claim 7, wherein The length and width dimensions of the heat dissipation base are not less than the length and width dimensions of the cover shell.

9. The servo driver according to claim 7, wherein Both ends in the length direction or width direction of the heat dissipation base extend out to form mounting parts for assembling the servo driver.

10. The servo driver according to claim 9, wherein The mounting parts include a plurality of mounting openings distributed at a plurality of corner positions.

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