A servo driver

Abstract

The utility model relates to a kind of servo driver, including shell, control panel, power board, heat dissipation gasket and the heat sink for partition heat dissipation, the heat sink is installed on shell, the control panel is installed on power board, the power board is installed on heat sink, the heat dissipation gasket is between power board and heat sink, the heat sink is according to the heat of power board heating area Heat level plan divides multiple heat dissipation partitions.The heat sink of the utility model adopts high-low distributed design and divides different partitions, and the position and shape of modeling cutting are one-to-one corresponding with the electronic component heat source partition of power board, form relatively independent heat dissipation unit, reduce the heat interference between different heating devices in combination with height difference.

Description

Technical Field

[0001] This utility model relates to the field of servo driver technology, and in particular to a servo driver. Background Technology

[0002] A servo driver is a controller used to control a servo motor. It is part of a servo system and is mainly used in high-precision positioning systems. It typically controls the servo motor through three methods: position, speed, and torque, to achieve high-precision positioning of the transmission system.

[0003] Servo drives are widely used in industrial control and automated production, such as 3C automation, single-axis robots, logistics, and other automated control industries. With the rapid development of the automation industry, the market demands increasingly higher drive performance and system integration. Therefore, good heat dissipation performance is particularly important. Currently, the main shortcomings of servo drives include: Most servo driver housings and heat sinks on the market are fixed with clips. Because there are too many clips, disassembly and repair are extremely inconvenient, and sometimes four screwdrivers are needed to disassemble them at the same time. The assembly process of circuit boards and heat sinks involves numerous screw holes and lacks foolproof positioning design, resulting in reduced assembly efficiency.

[0004] Servo drivers use thermal grease as the heat-conducting material to dissipate heat from the driver's power module. However, applying thermal grease is time-consuming and labor-intensive, and uneven application can lead to poor heat dissipation. Additionally, some electronic components generate significant heat, which can concentrate and shorten the lifespan of these components, potentially damaging the driver.

[0005] Utility model patent CN217336264U discloses a driver and a driving system. The driver includes: a housing and a heat sink, which together form a receiving space; a control board, which is disposed within the receiving space and mounted on the heat sink. The control board includes at least one power heat dissipation area and a power driving circuit with at least two power devices. The power heat dissipation area includes multiple heat dissipation holes penetrating the control board. At least one power device is attached to one side of the power heat dissipation area, and the other side of the power heat dissipation area is correspondingly disposed to the heat sink. In order to improve the heat dissipation effect, this patent uses multiple heat dissipation holes to transfer heat to the heat sink. However, it cannot avoid the mutual interference of multiple heat-generating devices, which affects the heat dissipation effect.

[0006] Therefore, providing a servo driver that can avoid mutual interference when multiple heat dissipation devices are dissipating heat is an urgent problem to be solved. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a servo driver.

[0008] The objective of this utility model can be achieved through the following technical solutions: According to one aspect of the present invention, a servo driver is provided, including a housing, a control board, a power board, heat dissipation pads, and a heat sink for partitioned heat dissipation. The heat sink is mounted on the housing, the control board is mounted on the power board, the power board is mounted on the heat sink, the heat dissipation pads are located between the power board and the heat sink, and the heat sink is divided into multiple heat dissipation zones according to the heat level of the power board's heat-generating areas.

[0009] As a preferred technical solution, each of the multiple heat dissipation zones includes a heat-conducting part and a heat dissipation fin arranged back to back.

[0010] As a preferred technical solution, the heat-conducting part faces the heat dissipation pad, and the distance between the heat-conducting part and the heat dissipation pad is adjusted according to the heat generated in the heat-generating area.

[0011] As a preferred technical solution, the height of the heat dissipation fins in different heat dissipation zones is adjusted according to the heat generated in the heat-generating area.

[0012] As a preferred technical solution, heat dissipation fins are also provided between the multiple heat dissipation zones to separate the heat dissipation zones.

[0013] As a preferred technical solution, the heat dissipation fin cut is set at the separation position of different heat dissipation zones, or the heat dissipation fin and the mounting wall of the radiator form a heat dissipation fin cut.

[0014] The radiator also includes a radiator fixing unit, and the housing includes a housing fixing unit. The radiator is connected to the housing fixing unit and the housing through the radiator fixing unit.

[0015] As a preferred technical solution, the radiator fixing unit includes a radiator groove and a radiator boss, and the outer shell fixing unit includes an outer shell buckle and an outer shell boss. The radiator boss is disposed on the radiator groove and forms a fixing cavity, and the outer shell boss is disposed on the outer shell buckle and installed in the fixing cavity.

[0016] As a preferred technical solution, the radiator fixing unit further includes a positioning piece, and the outer shell fixing unit further includes a snap-fit ​​groove. The positioning piece is disposed in the radiator groove, the snap-fit ​​groove is disposed on the outer shell snap-fit, and the positioning piece is mounted on the outer shell snap-fit.

[0017] As a preferred technical solution, the heat sink further includes a positioning and error prevention unit, and the power board is connected to the heat sink through the positioning and error prevention unit.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The heat sink of this utility model adopts a high-low distributed design and is divided into different zones. The shape and cutting position correspond one-to-one with the heat source zones of the electronic components on the power board, forming relatively independent heat dissipation units. Combined with the height difference, it reduces thermal interference between different heat-generating devices.

[0019] 2. In this utility model, the distance between multiple heat dissipation zones and heat dissipation pads is determined according to the heat generated by the heat-generating device, forming high and low barriers, reducing the heat conduction path between different temperature zones, realizing heat zone separation, and making the heat dissipation structure simpler and more reliable.

[0020] 3. This utility model also includes heat dissipation ribs, the height of which is designed differently according to the heat generation of each zone. The heat dissipation ribs are located away from the heat source, and their height is reduced to decrease the weight of the radiator.

[0021] 4. This utility model has heat dissipation fins cut into the area with the highest heat generation, separating it from other areas, reducing the heat conduction path between different temperature zones, which is beneficial for heat dissipation and thus improves the service life of the components.

[0022] 5. The outer shell protrusion on the outer shell buckle of this utility model is embedded in the heat sink groove. When disassembling, the outer shell buckle is pried up with a screwdriver. Due to the interference between the outer shell protrusion and the heat sink protrusion, the outer shell buckle will not spring back. This allows the driver to be disassembled with only a screwdriver, which is convenient for the disassembly and maintenance of the driver.

[0023] 6. This utility model uses a heat dissipation pad as the thermal conductive material to replace the common thermal grease, which facilitates the assembly of the driver on the production line and improves production efficiency. The heat sink contact surface is CNC machined to Ra≤1.6μm, and after being combined with the backing adhesive layer of the pad, the interface thermal resistance is reduced.

[0024] 7. This utility model is equipped with a positioning and error-proof unit, which can quickly position the power board and the screw holes on the heat sink, greatly improving the assembly speed and production efficiency. Attached Figure Description

[0025] Figure 1 This is an exploded view of the overall structure of this utility model; Figure 2 This is a schematic diagram of the installation of the radiator of this utility model; Figure 3 This is a front view of the present utility model; Figure 4 This is a rear view of the present invention; Figure 5 This is a partially enlarged cross-sectional view of the outer shell fixing unit of this utility model; Figure 6 This is a partial enlarged view of the heat sink fixing unit of this utility model; Figure 7 This is a schematic diagram of the partitioning on the back of the heat dissipation groove of this utility model; Figure 8 This is a schematic diagram of the installation of the heat dissipation fins of this utility model; Figure 9 This is a schematic diagram of the installation of the positioning and error-proofing unit of this utility model; Figure 10 This is a schematic diagram of the other side of the power board of this utility model; Figure 11 This is a schematic diagram of the hole distribution on the power board of this utility model; Figure 12 This is a schematic diagram of the disassembly process of this utility model; 1. Flip-top protective screen; 2. Outer shell; 3. Control board; 4. Power board; 5. Heat dissipation pad; 6. Heat sink; 21. Outer shell latch; 22. Clip groove; 211. Outer shell boss; 41. Positioning post hole; 421. First screw hole; 422. Second screw hole; 423. Third screw hole; 424. Fourth screw hole; 425. Fifth screw hole; 426. Sixth screw hole; 61. Heat sink boss; 62. Heat sink recess; 631. First screw post; 632. Second screw post; 633. Third screw post; 634. Fourth screw post; 635. Fifth screw post; 636. Sixth screw post; 64. Foolproof positioning post; 651. First partition; 652. Second partition; 653. Third partition; 654. Fourth partition; 66. Heat dissipation fin; 661. Heat dissipation fin cutout; 67. Positioning piece; 68. Fixing wall. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0027] Example 1 like Figure 1 As shown, a servo driver includes a housing 2, a control board 3, a power board 4, a heat dissipation pad 5, and a heat sink 6 for partitioned heat dissipation. The heat sink 6 is mounted on the housing 2, the control board 3 is mounted on the power board 4, the power board 4 is mounted on the heat sink 6, the heat dissipation pad 5 is located between the power board 4 and the heat sink 6, and the heat sink 6 is divided into multiple heat dissipation zones according to the heat level of the power board's heat-generating area.

[0028] In this embodiment, the present invention provides a servo driver comprising a housing 2, a control board 3, a power board 4, heat dissipation pads 5, and a heat sink 6. The housing 2 is mounted on the heat sink 6 via four clips, forming a cavity. The control board 3, power board 4, and heat dissipation pads 5 are installed inside the cavity. The control board 3 and power board 4 are fixed together using a plug-in method. Simultaneously, based on the different components on the power board 4, the heat sink 6 is designed with a high-low distribution, creating a height difference and reducing the impact of heat diffusion between different components. Furthermore, in the area with the highest heat generation, CNC machining ensures planar accuracy. The heat dissipation pads 5 are adhered to the heat sink 6 to transfer heat between the power board 4 and the heat sink 6, significantly reducing interface thermal resistance and greatly improving heat dissipation efficiency.

[0029] The control board 3 is soldered onto the power board 4 via a plug-in interface. The control board 3 has one display tube and five buttons soldered onto it. The display tube and buttons protrude from the outer casing 2, allowing observation of the display tube's status from the outside and operation of the driver via the buttons.

[0030] The thermal pad 5 has an adhesive backing on one side, which is attached to the heatsink 6, while the other side is firmly attached to the power board 4. It provides insulation between the power board 4 and the heatsink 6, while simultaneously transferring heat from the power board 4 to the heatsink 6, thus providing heat dissipation for the power board 4. Using the thermal pad 5 instead of the commonly used thermal grease avoids poor heat dissipation caused by uneven thermal grease thickness, and also facilitates product assembly and production, improving production efficiency.

[0031] like Figure 7 As shown, the multiple heat dissipation zones all have heat-conducting parts and heat dissipation ribs 66 arranged back-to-back. The heat-conducting parts face the heat dissipation pad 5, and the distance between the heat-conducting parts of the multiple heat dissipation zones and the heat dissipation pad 5 is adjusted according to the heat generated by the heat-generating area. The height of the heat dissipation ribs 66 in different heat dissipation zones is adjusted according to the heat generated by the heat-generating area.

[0032] In this embodiment, the plurality of heat dissipation zones are specifically a first zone 651, a second zone 652, a third zone 653, and a fourth zone 654. Each of these zones includes a heat-conducting part and a heat-dissipating rib 66, which are arranged back-to-back. The heat-conducting part faces the heat dissipation pad 5, and its height or depth is adjusted according to the heat generated in the heat-generating area. The height of the heat-dissipating rib 66 in different heat dissipation zones is also adjusted according to the heat generated in the heat-generating area.

[0033] The heat sink 6 includes a mounting wall, a base plate, and a fixing wall 68. The base plate is connected to the mounting wall and the fixing wall 68 respectively, dividing the base plate into a front and a back (the back faces the heat dissipation pad 5). The front is used to install the heat dissipation fins 66, and the back is used to set different heat dissipation zones. It adopts a high-low distributed design. According to the different heat dissipation areas on the power board 4, the shape is divided into zones and distributed on different planes to form a height difference (or it can be regarded as a thickness difference). Specifically, there are four distinct zones: Zone 1 (651), Zone 2 (652), Zone 3 (653), and Zone 4 (654), each corresponding to a heat-generating component on the power board. Each zone includes a set of back-to-back heat-conducting sections and heat-dissipating fins (66). The heat-conducting sections conduct heat to the heat-dissipating fins (66) for heat dissipation. The height or depth of the heat-conducting sections can be adjusted to fit or not fit the heat dissipation pads (5) depending on the heat output of the power board (4). For example, if the heat-conducting section of Zone 1 (651, or any other zone) generates the most heat, its entire bonding surface is CNC machined to Ra ≤ 1.6 μm, reducing the interfacial thermal resistance after bonding with the pad's adhesive layer. Zones with lower heat output may not need to fit with the heat dissipation pads (5). The height of the heat dissipation fins (66) in each heat dissipation zone can also be adjusted accordingly based on the heat output.

[0034] In this embodiment, the heat dissipation partition is divided into four partitions, but the number of heat dissipation partitions in the heat sink of this application is not limited to this. The number of partitions can be designed according to the position distribution of different heat-generating components on the power board. For example, the heat dissipation partitions can be three, five, six, etc.

[0035] like Figure 8 As shown, heat dissipation rib cutouts 661 for separating heat dissipation zones are also provided between the multiple heat dissipation zones. The heat dissipation rib cutouts 66 are set at the separating positions of different heat dissipation zones, or the heat dissipation ribs 66 and the mounting wall of the radiator 6 form heat dissipation rib cutouts 661.

[0036] In this embodiment, heat dissipation fins 66 are provided to further improve heat dissipation efficiency. The heat dissipation fins 66 and multiple heat dissipation zones are arranged back to back, which facilitates the direct conduction of heat to the heat dissipation fins 66 through the heat dissipation zones for heat dissipation.

[0037] A heat dissipation fin cutout 661 is also provided to divide the heat dissipation fins 66. During division, the cutout is placed at the edge of the heat dissipation zone with the highest heat generation, separating the divided heat dissipation fins 66 from other heat dissipation zones, reducing the heat conduction path between different temperature zones. This heat zone separation is achieved through sculpted cutting. Besides the heat dissipation zone with the highest heat generation, heat dissipation fin cutouts 661 can also be provided in other heat dissipation zones as partitions. The height of the heat dissipation fins 66 can be differentiated according to the amount of heat generated. When the heat dissipation fins 66 are far from the heat source or located in a heat dissipation zone with lower heat generation, the height of the heat dissipation fins 66 is reduced, thus reducing the weight of the radiator.

[0038] There are two ways to form the heat dissipation fin cutout 661. One is to directly make an opening on the heat dissipation fin 66 according to the location of the heat dissipation zone to form the heat dissipation fin cutout 661. The other is that the heat dissipation fin 666 can form the heat dissipation fin cutout 661 between the heat dissipation fin 66 and the irregular mounting wall, which can avoid additional openings. The heat dissipation fin 66 is parallel to the fixed wall 68 to ensure that the formed air duct is straight and facilitates heat dissipation.

[0039] like Figures 2-4 As shown, the radiator 6 further includes a radiator fixing unit, and the outer shell 2 includes an outer shell fixing unit. The radiator 6 is connected to the outer shell fixing unit and the outer shell 2 through the radiator fixing unit.

[0040] like Figure 5 and Figure 6 As shown, the radiator fixing unit includes a radiator groove 62 and a radiator boss 61, and the outer shell fixing unit includes an outer shell buckle 21 and an outer shell boss 211. The radiator boss 61 is disposed on the radiator groove 62 and forms a fixing cavity, and the outer shell boss 211 is disposed on the outer shell buckle 21 and installed in the fixing cavity.

[0041] The radiator fixing unit also includes a positioning piece 67, and the outer shell fixing unit also includes a snap-fit ​​groove 22. The positioning piece 67 is disposed in the radiator groove 62, and the snap-fit ​​groove 22 is disposed on the outer shell snap-fit ​​21. The positioning piece 67 is mounted on the outer shell snap-fit ​​21.

[0042] In this embodiment, the radiator 6 and the outer casing 2 are connected and fixed by a radiator fixing unit and an outer casing fixing unit. The snap fastener 21 is provided with an outer casing boss 211, and the radiator 6 is provided with a radiator boss 61 and a radiator groove 62, forming a fixing cavity. When installing the outer casing 2, the four snap fasteners 21 are fixed to the radiator 6, and the outer casing boss 211 is snapped into the radiator groove 62 (i.e., the outer casing boss 211 is installed in the fixing cavity). When it is necessary to disassemble the outer casing 2, such as... Figure 12 As shown, pry up one of the clips 21 with a screwdriver. Due to the interference fit between the outer shell boss 211 and the heat sink boss 61, the clip 21 will not spring back, thus remaining in the loose state. Then pry up the remaining 3 clips 21 with a screwdriver. At this time, all 4 clips 21 are in the loose state, and the outer shell 2 can be easily removed from the heat sink 6. In addition, the positioning piece 67 and the clip slot 22 cooperate with each other to achieve both fixation and positioning, making it convenient for the outer shell boss 211 to snap into the heat sink groove 62.

[0043] like Figures 9-11 As shown, the radiator 6 also includes a positioning and error prevention unit, and the power board 4 is connected to the radiator 6 through the positioning and error prevention unit.

[0044] In this embodiment, the positioning and anti-foolproof unit includes positioning post holes 41, anti-foolproof positioning posts 64, first screw holes 421, second screw holes 422, third screw holes 423, fourth screw holes 424, fifth screw holes 425, sixth screw holes 426, first screw posts 631, second screw posts 632, third screw posts 633, fourth screw posts 634, fifth screw posts 635, and sixth screw posts 636. The power board 4 matches the anti-foolproof positioning posts 64 on the heat sink 6 through the positioning post holes 41, ensuring that the first screw holes 421, second screw holes 422, third screw holes 423, fourth screw holes 424, fifth screw holes 425, and sixth screw holes 426 on the power board 4 are aligned with the first screw posts 631, second screw posts 632, third screw posts 633, fourth screw posts 634, fifth screw posts 635, and sixth screw posts 636 on the heat sink 6, thus completing the rapid assembly of the power board 4 and the heat sink 6.

[0045] Based on the above-described structural features of this utility model, it also has other beneficial effects, specifically: (1) The outer casing has a boss structure for the buckle, and the radiator has a groove and a boss structure for the buckle; (2) Heat dissipation pads are used as thermal conductive materials instead of common thermal conductive silicone grease; at the same time, the bonding surface is CNC machined and combined with the backing adhesive layer of the pad, thus reducing the interface thermal resistance.

[0046] (3) The foolproof positioning column design allows the power board to be positioned quickly, improving installation efficiency.

[0047] (4) The heat sink contact surface adopts a high-low distributed design, divided into multiple planes, and separated by "shape cutting". Grooves or high-low partitions are opened in the heat sink base to reduce the heat conduction path between different temperature zones. By shape cutting, the heat zone is separated, and the heat dissipation structure is simpler and more reliable.

[0048] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A servo driver, characterized in that, The device includes a housing (2), a control board (3), a power board (4), a heat dissipation pad (5), and a heat sink (6) for partitioned heat dissipation. The heat sink (6) is mounted on the housing (2), the control board (3) is mounted on the power board (4), the power board (4) is mounted on the heat sink (6), the heat dissipation pad (5) is located between the power board (4) and the heat sink (6), and the heat sink (6) is divided into multiple heat dissipation zones according to the heat level of the power board's heat dissipation area.

2. A servo driver according to claim 1, characterized in that, Each of the multiple heat dissipation zones includes a heat-conducting part and a heat dissipation fin (66) arranged back to back.

3. A servo driver according to claim 2, characterized in that, The heat-conducting part faces the heat dissipation pad (5), and the distance between the heat-conducting part and the heat dissipation pad (5) is adjusted according to the heat generated in the heat-generating area.

4. A servo driver according to claim 2, characterized in that, Adjust the height of the heat dissipation fins (66) of different heat dissipation zones according to the heat generated in the heat dissipation area.

5. A servo driver according to claim 2, characterized in that, The plurality of heat dissipation zones are provided with heat dissipation fin cutouts (661) for separating the heat zones.

6. A servo driver according to claim 5, characterized in that, The heat dissipation fin cut (661) is set at different heat dissipation partition separation positions, or the heat dissipation fin (66) and the mounting wall of the radiator (6) form the heat dissipation fin cut (661).

7. A servo driver according to claim 1, characterized in that, The radiator (6) further includes a radiator fixing unit, and the outer shell (2) includes an outer shell fixing unit. The radiator (6) is connected to the outer shell fixing unit and the outer shell (2) through the radiator fixing unit.

8. A servo driver according to claim 7, characterized in that, The radiator fixing unit includes a radiator groove (62) and a radiator boss (61). The outer shell fixing unit includes an outer shell buckle (21) and an outer shell boss (211). The radiator boss (61) is disposed on the radiator groove (62) and forms a fixing cavity. The outer shell boss (211) is disposed on the outer shell buckle (21) and is installed in the fixing cavity.

9. A servo driver according to claim 8, characterized in that, The radiator fixing unit also includes a positioning piece (67), and the outer shell fixing unit also includes a snap-fit ​​groove (22). The positioning piece (67) is disposed in the radiator groove (62), and the snap-fit ​​groove (22) is disposed on the outer shell snap-fit ​​(21). The positioning piece (67) is mounted on the outer shell snap-fit ​​(21).

10. A servo driver according to claim 1, characterized in that, The radiator (6) also includes a positioning and error prevention unit, and the power board (4) is connected to the radiator (6) through the positioning and error prevention unit.

Images