Servo driver

Abstract

The utility model relates to the driver technical field, and specifically discloses a servo driver comprising a housing, a heat radiation member, a control device and a fan, the heat radiation member is detachably connected with the housing and comprises a heat conduction base plate and a plurality of heat radiation air channels, the plurality of heat radiation air channels are arranged on a first plate surface of the heat conduction base plate, and the heat radiation member is detachably connected with the housing. The heat dissipation air channel comprises a first air channel and a second air channel which are communicated with each other and form an included angle; the control device comprises a circuit board fixedly connected with the heat conduction bottom plate, and a first heating device and a second heating device which are electrically connected with the circuit board and located between the heat conduction bottom plate and the circuit board, and the first heating device and the second heating device correspond to the first air channel and the second air channel in the plate thickness direction of the heat conduction bottom plate correspondingly. The fan is opposite to an air inlet of the first air channel and used for blowing air to the first air channel. Compared with an existing linear heat dissipation air channel, the heat dissipation air channel is longer and can cover more heating devices, and therefore the heat dissipation speed of the servo driver is higher, and the heat dissipation effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of drivers, in particular to a servo driver. Background Art

[0002] The servo drive in the prior art includes a housing, a control device stacked in the housing, a heat sink, and a fan, wherein the control device includes a circuit board and a variety of electrical components welded to the circuit board, and the various electrical components include a heating device that generates relatively high heat after being powered on; the heat sink includes a heat-conducting base plate and a plurality of heat-dissipating air ducts provided on the heat-conducting base plate, and the fan is located at one end of the heat-dissipating air duct, which is linear and extends along the blowing direction of the fan. When the servo drive is working, the heating device is powered on to generate heat, and the heat generated by the heating device is conducted to the heat-conducting base plate of the heat sink and diffused into the heat-dissipating air duct. At this time, the fan is powered on to work, and the wind blown by the fan flows along the heat-dissipating air duct, bringing the heat in the heat-dissipating air duct out of the housing in a timely manner.

[0003] However, due to the height and cost restrictions of the housing space, the area of ​​the heat-conducting bottom plate of the servo driver is usually only half of the area of ​​the circuit board or even smaller, and the heat dissipation duct cannot cover all the heat-generating devices. Therefore, the number of heat-generating devices that can be covered by the heat dissipation duct directly determines the heat dissipation capacity of the heat sink. However, the servo driver in the prior art adopts a linear heat dissipation duct, the length of which is limited, and can only cover the heat-generating devices in a single linear direction, and the covered heat-generating devices are relatively small. Therefore, the heat dissipation speed of the servo driver in the prior art is slow and the heat dissipation effect is poor. Utility Model Content

[0004] The purpose of the utility model is to provide a servo driver to improve the heat dissipation speed and heat dissipation effect of the servo driver.

[0005] The utility model provides a servo driver, which comprises:

[0006] case;

[0007] A heat sink is detachably connected to the housing, the heat sink comprises a heat-conducting bottom plate and a plurality of heat-dissipating air ducts, along the thickness direction of the heat-conducting bottom plate, the heat-conducting bottom plate comprises a first plate surface and a second plate surface which are arranged opposite to each other, a plurality of heat-dissipating air ducts are arranged on the first plate surface, the heat-dissipating air ducts comprise a first air duct and a second air duct which are interconnected, the first air duct extends along a first direction, the second air duct extends along a second direction, and the first direction and the second direction are arranged at an angle;

[0008] A control device, comprising a circuit board, and a first heating device and a second heating device both electrically connected to the circuit board, wherein the circuit board and the heat-conducting bottom plate are stacked along the plate thickness direction, and the circuit board and the heat-conducting bottom plate are fixedly connected, the first heating device and the second heating device are both located between the second plate surface and the circuit board, and along the plate thickness direction, the first heating device corresponds to the position of the first air duct, and the second heating device corresponds to the position of the second air duct;

[0009] A fan is installed on the first panel surface, the fan is opposite to the air inlet of the first air duct and is used for blowing air into the first air duct.

[0010] As a preferred technical solution of the servo drive, the servo drive further includes a first fastening screw, which passes through the circuit board and the first heating element in sequence and is fixedly connected to the second board surface; and / or,

[0011] The servo driver further includes a second fastening screw, which passes through the circuit board and the second heating element in sequence and is fixedly connected to the second board surface.

[0012] As a preferred technical solution of the servo drive, the first heating element is in contact with the second plate surface, and the surface where the first heating element is in contact with the second plate surface is coated with thermal conductive silicone grease; and / or,

[0013] The second heating element is in contact with the second plate surface, and a surface where the second heating element is in contact with the second plate surface is coated with thermal conductive silicone grease.

[0014] As a preferred technical solution of the servo drive, the servo drive further includes an insulating thermal pad;

[0015] The insulating thermal pad is sandwiched between the first heating device and the second board surface; and / or the insulating thermal pad is sandwiched between the second heating device and the second board surface.

[0016] As a preferred technical solution for the servo drive, the first heating device and the second heating device are both soldered to the circuit board, the first heating device is one of the rectifier bridge and the power module, and the second heating device is the other of the rectifier bridge and the power module.

[0017] As a preferred technical solution of the servo drive, the heat sink also includes:

[0018] A side plate, wherein the side plate is detachably connected to the shell, and the side plate is vertically connected to the heat-conducting bottom plate, and the side plate and the shell together form a storage space for accommodating the control device;

[0019] A plurality of first heat dissipation plates, each of which is fixedly connected to the first plate surface, and the first air duct is formed between adjacent first heat dissipation plates;

[0020] A plurality of second heat sinks are fixedly connected to the first plate surface, and each of the second heat sinks is parallel to the side plate. A plurality of first heat sinks are connected to a plurality of second heat sinks in a one-to-one correspondence at an angle, and a second air duct is formed between adjacent second heat sinks. The lengths of the plurality of first heat sinks increase successively in a direction away from the side plate.

[0021] As a preferred technical solution of the servo drive, the housing is a cubic structure, an air inlet and an air outlet are respectively provided on two opposite sides of the housing, and an opening located between the air inlet and the air outlet is also provided on the housing, and the side plate blocks the opening;

[0022] The heat sink also includes a plurality of third heat sinks, which are all fixedly connected to the first plate surface and located on a side of the fan away from the first air duct, the plurality of third heat sinks are spaced apart and extend out of the accommodating space from the air inlet, and one end of the plurality of second heat sinks away from the fan extends out of the accommodating space from the air outlet.

[0023] As an optimal technical solution for the servo drive, the heat sink also includes a fourth heat sink adjacent to the side panel, the fourth heat sink is fixedly connected to the first panel surface, the fourth heat sink is arranged parallel to the side panel and an auxiliary heat dissipation duct is formed between the fourth heat sink and the side panel.

[0024] As an optimal technical solution for the servo drive, the heat sink also includes a mounting platform fixedly connected to the first board surface, and the control device also includes a braking resistor, which is fixed to the mounting platform and electrically connected to the circuit board via a connecting wire.

[0025] As a preferred technical solution of the servo drive, the heat sink further includes two spaced-apart limit blocks, both of which are fixedly connected to the first plate surface, and the fan is embedded between the two limit blocks.

[0026] The servo drive provided by the utility model has at least the following beneficial effects:

[0027] The servo driver provided by the embodiment of the utility model includes a housing, a heat sink, a control device and a fan. The heat sink is detachably connected to the housing, and the heat sink includes a heat-conducting base plate and a plurality of heat-dissipating air ducts. Along the plate thickness direction of the heat-conducting base plate, the heat-conducting base plate includes a first plate surface and a second plate surface that are arranged opposite to each other, and the plurality of heat-dissipating air ducts are all arranged on the first plate surface, and the heat-dissipating air ducts include a first air duct and a second air duct that are interconnected, the first air duct extends along the first direction, and the second air duct extends along the second direction, and the first direction and the second direction are arranged at an angle; the control device includes a circuit board, and a first heating device and a second heating device that are both electrically connected to the circuit board, the circuit board and the heat-conducting base plate are stacked along the plate thickness direction, and the circuit board is fixedly connected to the heat-conducting base plate, the first heating device and the second heating device are both located between the second plate surface and the circuit board, and along the plate thickness direction, the first heating device corresponds to the position of the first air duct, and the second heating device corresponds to the position of the second air duct; the fan is installed on the first plate surface, and the fan is opposite to the air inlet of the first air duct and is used to blow air to the first air duct. The heat emitted by the first heating device in the servo driver can be conducted to the first air duct through the heat-conducting bottom plate, and the heat emitted by the second heating device can be conducted to the second air duct through the heat-conducting bottom plate. The wind blown by the fan to the first air duct can flow along the first air duct and the second air duct in sequence, and blown to the outside of the shell by the second air duct, so as to bring the heat in the heat dissipation air duct out of the shell in time. In the servo driver provided by the embodiment of the utility model, since the heat dissipation air duct includes the first air duct and the second air duct arranged at an angle, compared with the linear heat dissipation air duct in the prior art, according to the triangle law that "the sum of the two sides is greater than the length of the third side", the heat dissipation air duct in this scheme is longer and can cover more heating devices, so the heat dissipation speed of the servo driver is faster and the heat dissipation effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A sectional view of a servo drive in an embodiment of the present utility model Figure 1 ;

[0029] Figure 2 A sectional view of a servo drive in an embodiment of the present utility model Figure 2 ;

[0030] Figure 3 This is an exploded view of the servo driver in the embodiment of the utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the heat sink in the servo driver in the embodiment of the utility model;

[0032] Figure 5 The structure of the servo driver in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0033] Figure 6 The structure of the servo driver in the embodiment of the utility model is shown in FIG. Figure 2 .

[0034] In the figure:

[0035] 1. Shell; 11. Air inlet; 12. Air outlet; 13. Opening; 14. First wall; 15. Second wall; 16. Third wall; 17. Fourth wall; 18. Fifth wall; 181. Slot; 19. Card slot;

[0036] 2. heat sink; 21. heat-conducting bottom plate; 211. first plate surface; 212. second plate surface; 22. heat dissipation duct; 221. first duct; 222. second duct; 223. auxiliary heat dissipation duct; 23. side plate; 231. card table; 24. first heat dissipation plate; 25. second heat dissipation plate; 26. third heat dissipation plate; 27. fourth heat dissipation plate; 28. mounting table; 29. ​​limit block;

[0037] 3. Control device; 31. Circuit board; 311. Interface; 32. First heating device; 33. Second heating device; 34. Braking resistor; 35. Magnetic core module;

[0038] 4. Fan;

[0039] 51. first fastening screw; 52. second fastening screw;

[0040] 6. Insulation thermal pad;

[0041] 7. Accommodate space. DETAILED DESCRIPTION

[0042] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0046] Please refer to Figures 1 to 4 The present embodiment provides a servo drive, which includes a housing 1, a heat sink 2, a control device 3 and a fan 4. The heat sink 2 is detachably connected to the housing 1, and includes a heat-conducting bottom plate 21 and a plurality of heat-dissipating air ducts 22. Figure 1 The heat-conducting bottom plate 21 includes a first plate surface 211 and a second plate surface 212 that are arranged opposite to each other. A plurality of heat dissipation ducts 22 are arranged on the first plate surface 211. The heat dissipation ducts 22 include a first duct 221 and a second duct 222 that are interconnected. The first duct 221 extends in a first direction (as shown by arrows ab in FIG. 1 ). Figure 2 The second air duct 222 extends in the second direction (as shown by the arrows cd in FIG. Figure 3 The control device 2 includes a circuit board 31, and a first heating device 32 and a second heating device 33 which are both electrically connected to the circuit board 31. The circuit board 31 and the heat-conducting base plate 21 are stacked in a plate thickness direction, and the circuit board 31 and the heat-conducting base plate 21 are fixedly connected. The first heating device 32 and the second heating device 33 are both located between the second plate surface 212 and the circuit board 31, and along the plate thickness direction, the first heating device 32 corresponds to the position of the first air duct 221, and the second heating device 33 corresponds to the position of the second air duct 222; the fan 4 is installed on the first plate surface 211, and the fan 4 is opposite to the air inlet of the first air duct 221 and is used to blow air to the first air duct 221. In the servo driver provided by the present embodiment, the heat emitted by the first heating device 32 can be conducted to the first air duct 221 through the heat-conducting base plate 21, and the heat emitted by the second heating device 33 can be conducted to the second air duct 222 through the heat-conducting base plate 21. The wind blown by the fan 4 to the first air duct 221 can flow along the first air duct 221 and the second air duct 222 in sequence, and be blown to the outside of the shell 1 through the air outlet 12 of the second air duct 222, so that the heat in the heat dissipation air duct 22 is brought out of the shell 1 in time. Since the heat dissipation air duct 22 includes the first air duct 221 and the second air duct 222 arranged at an angle, compared with the linear heat dissipation air duct 22 in the prior art, according to the triangle law that "the sum of the two sides is greater than the length of the third side", the heat dissipation air duct 22 in the present embodiment is longer and can cover more heat-generating devices. Therefore, the servo driver provided by the embodiment of the utility model has a faster heat dissipation speed and a better heat dissipation effect.

[0047] In this embodiment, the plate thickness direction is perpendicular to both the first direction and the second direction. The heat-conducting bottom plate 21 is made of a material with good heat-conducting performance, such as aluminum, copper, and the like.

[0048] Optionally, see Figure 3 , the first heating device 32 and the second heating device 33 are both welded to the circuit board 31, the first heating device 32 is one of the rectifier bridge and the power module, and the second heating device 33 is the other of the rectifier bridge and the power module. Specifically, in this embodiment, the first heating device 32 is exemplarily given as a rectifier bridge, and the second heating device 33 is a power module. Among them, along the plate thickness direction, the rectifier bridge corresponds to the position of the first air duct 221, and the heat generated by the rectifier bridge can be diffused into the first air duct 221 through the heat-conducting bottom plate 21, and the power module corresponds to the position of the second air duct 222, and the heat generated by the power module can be diffused into the second air duct 222 through the heat-conducting bottom plate 21. The fan 4 works and can bring the heat generated by the rectifier bridge and the power module to the outside of the housing 1 in time. In other embodiments, the first heating device 32 can also be a power module, and the second heating device 33 is a rectifier bridge.

[0049] Optionally, see Figure 2 and Figure 3 The control device 3 further includes a third heating device, which corresponds to the position of the second air duct 222 along the plate thickness direction, and the third heating device is a brake resistor 34 or a magnetic core module 35. The heat generated by the third heating device can be diffused into the second air duct 222 through the heat-conducting bottom plate 21, and the fan 4 can also bring the heat generated by the third heating device to the outside of the housing 1 when it is working.

[0050] Optionally, see Figure 3 The servo driver further includes a first fastening screw 51, which passes through the circuit board 31 and the first heating element 32 in sequence and is fixedly connected to the second board surface 212; and / or the servo driver further includes a second fastening screw 52, ​​which passes through the circuit board 31 and the second heating element 33 in sequence and is fixedly connected to the second board surface 212. Such an arrangement makes the first heating element 32 and / or the second heating element 33 abut against the second board surface 212 of the heat-conducting bottom plate 21, and the heat emitted by the first heating element 32 and / or the second heating element 33 is quickly transferred to the heat-conducting bottom plate 21 and diffused to the heat dissipation duct 22 to improve the heat dissipation efficiency.

[0051] Optionally, please continue to refer to Figure 3 The servo driver further includes an insulating thermal pad 6; an insulating thermal pad 6 is sandwiched between the first heating device 32 and the second board surface 212; and / or an insulating thermal pad 6 is sandwiched between the second heating device 33 and the second board surface 212. In this configuration, due to the elasticity of the insulating thermal pad 6, the insulating thermal pad 6 can be well attached to the heating device (the first heating device 32 or the second heating device 33) and the second board surface 212 of the thermal conductive bottom plate 21. After the heating device is welded to the circuit board 31, even if there is an error in the height of the heating device along the board thickness direction, it can ensure that the heating device and the second board surface 212 of the thermal conductive bottom plate 21 can be well heat exchanged, thereby ensuring the heat dissipation effect.

[0052] As an alternative solution, the first heating device 32 abuts against the second board surface 212, and the surface where the first heating device 32 abuts against the second board surface 212 is coated with thermal conductive silicone glue (not shown in the drawings); and / or, the second heating device 33 abuts against the second board surface 212, and the surface where the second heating device 33 abuts against the second board surface 212 is coated with thermal conductive silicone glue (not shown in the drawings). With such an arrangement, the thermal conductive silicone glue can also be well contacted with the heating device and the second board surface 212 of the thermal conductive base plate 21. When the heating device is welded to the circuit board 31, even if there is an error in the height of the heating device along the board thickness direction, it can ensure that the heating device and the second board surface 212 of the thermal conductive base plate 21 can exchange heat well, thereby ensuring the heat dissipation effect.

[0053] Optionally, see Figures 1 to 4 The heat sink 2 further includes a side plate 23, a plurality of first heat sinks 24 and a plurality of second heat sinks 25. The side plate 23 is detachably connected to the housing 1, and the side plate 23 is vertically connected to the heat-conducting bottom plate 21. The side plate 23 and the housing 1 together form a receiving space 7 for receiving the control device 3. The plurality of first heat sinks 24 and the plurality of second heat sinks 25 are fixedly connected to the first plate surface 211, and a first air duct 221 is formed between adjacent first heat sinks 24. Each second heat sink 25 is parallel to the side plate 23. The plurality of first heat sinks 24 and the plurality of second heat sinks 25 are connected at an angle in a one-to-one correspondence, and a second air duct 222 is formed between adjacent second heat sinks 25. In the direction away from the side plate 23, the lengths of the plurality of first heat sinks 24 increase successively. In this way, the length of the first heat sink 24 increases in the direction away from the side plate 23, that is, the first air ducts 221 gradually become longer in the direction away from the side plate 23, so that the heat sink duct 22 at the position away from the side plate 23 has a larger coverage area and can cover more heating devices, and the side plate 23 and the housing 1 together form the accommodating space 7, and the side plate 23 is exposed to the outside, so the closer to the side plate 23, the better the heat dissipation effect. Preferably, the side plate 23, the heat-conducting bottom plate 21, the first heat sinks 24 and the second heat sinks 25 are integrally formed, and are all made of materials with good thermal conductivity, such as copper, aluminum, etc.

[0054] Optionally, see Figure 3 , Figure 5 and Figure 6 The shell 1 is a cubic structure, and an air inlet 11 and an air outlet 12 are respectively provided on two opposite sides of the shell 1. The shell 1 is also provided with an opening 13 located between the air inlet 11 and the air outlet 12, and the side plate 23 blocks the opening 13; the heat sink 2 also includes a plurality of third heat sinks 26, and the plurality of third heat sinks 26 are all fixedly connected to the first plate surface 211 and are located on a side of the fan 4 away from the first air duct 221. The plurality of third heat sinks 26 are arranged at intervals and extend out of the accommodation space 7 from the air inlet 11, and one end of the plurality of second heat sinks 25 away from the fan 4 extends out of the accommodation space 7 from the air outlet 12. With such an arrangement, when the fan 4 is working, wind with a lower outside temperature must first pass through the third heat sink 26 before entering the air inlet of the first air duct 221, which can increase the contact area between the wind and the heat sink 2 and enhance the heat dissipation effect of the heat sink 2; in addition, the second heat sink 25 and the third heat sink 26 both extend out of the accommodating space 7, and the parts of the second heat sink 25 and the third heat sink 26 extending outside the accommodating space 7 are directly exposed to the outside, and can fully exchange heat with the air with a lower outside temperature, thereby being able to dissipate the heat inside the accommodating space 7 more quickly.

[0055] For details, please refer to Figure 3 , Figure 5 and Figure 6The housing 1 includes a first wall 14, a second wall 15, a third wall 16 and a fourth wall 17 connected end to end, and a fifth wall 18 connected to the first ends of the four walls. The second ends of the first wall 14, the second wall 15, the third wall 16 and the fourth wall 17 form an opening 13. The air inlet 11 is arranged on the first wall 14, and the air outlet 12 is arranged on the third wall 16, and the air inlet 11 and the air outlet 12 are both connected to the opening 13. Optionally, a plurality of slots 181 are arranged on the fifth wall 18, and the plurality of interfaces 311 on the circuit board 31 are arranged one by one corresponding to the plurality of slots 181.

[0056] Optionally, please continue to refer to Figure 3 , Figure 5 and Figure 6 , one of the shell 1 and the side panel 23 is provided with a card platform 231, and the other of the two is provided with a card slot 19, and the card platform 231 is engaged with the card slot 19 to realize that the side panel 23 and the shell 1 are detachably fixedly connected. Specifically, in this embodiment, an exemplary scheme is given in which the shell 1 is provided with a card slot 19, and the side panel 23 is provided with a card platform 231. In this way, the relative position of the shell 1 and the heat sink 2 is stable through the engagement of the card platform 231 and the card slot 19. Specifically, the second wall 15 and the fourth wall 17 are each provided with two card slots 19, and the side panel 23 is correspondingly provided with four card platforms 231, and the four card platforms 231 on the side panel 23 are respectively engaged with the four card slots 19 on the shell 1, so that the shell 1 and the side panel 23 are detachably fixedly connected. Preferably, the air inlet 11 passes through the first wall 14, a portion of the air inlet 11 extends to the second wall 15, the air outlet 12 passes through the third wall 16 and a portion of the air outlet 12 extends to a portion of the second wall 15, the air inlet 11 and the air outlet 12 are both connected to the opening 13. Such an arrangement makes the second end of the second wall 15 elastic, and when the card platform 231 is engaged with the card slot 19, the second wall 15 can elastically deform to avoid, so that the card platform 231 can be smoothly engaged with the card slot 19.

[0057] Optionally, see Figure 2 and Figure 4 The heat sink 2 further includes a fourth heat sink 27 adjacent to the side plate 23, the fourth heat sink 27 is fixedly connected to the first plate surface 211, the fourth heat sink 27 is arranged parallel to the side plate 23, and an auxiliary heat dissipation duct 223 is formed between the fourth heat sink 27 and the side plate 23. In this way, the auxiliary heat dissipation duct 223 is provided to assist heat dissipation, which can further improve the heat dissipation effect.

[0058] Optionally, see Figure 3The heat sink 2 further includes a mounting platform 28 fixedly connected to the first plate surface 211, and the control device 3 further includes a brake resistor 34, which is fixed to the mounting platform 28, and the brake resistor 34 is electrically connected to the circuit board 31 through a connecting line. In this arrangement, the heat generated by the brake resistor 34 is transferred to the mounting platform 28, and the mounting platform 28 transmits the heat to the first plate surface 211, and the fan 4 blows air to make the air flow along the heat dissipation duct 22 to quickly take the heat out of the housing 1. Specifically, a drive control circuit is provided on the circuit board 31, and the brake resistor 34 is electrically connected to the drive control circuit through a connecting line.

[0059] Optionally, see Figure 4 The heat sink 2 further includes two spaced apart limit blocks 29, both of which are fixedly connected to the first plate surface 211, and the fan 4 is embedded between the two limit blocks 29. Specifically, the fan 4 includes a cylinder and a plurality of blades rotatably mounted in the cylinder, the plurality of blades can rotate around the axis of the cylinder, the two limit blocks 29 are spaced apart along the radial direction of the cylinder, the plurality of first heat sinks 24 and the plurality of third heat sinks 26 are spaced apart along the axial direction of the cylinder, and the fan 4 is clamped between the two limit blocks 29, the plurality of first heat sinks 24, and the plurality of third heat sinks 26.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A servo drive, characterized in that: include: Housing (1); A heat sink (2) is detachably connected to the housing (1), the heat sink (2) comprising a heat-conducting base plate (21) and a plurality of heat-dissipating air ducts (22), along the plate thickness direction of the heat-conducting base plate (21), the heat-conducting base plate (21) comprising a first plate surface (211) and a second plate surface (212) disposed opposite to each other, the plurality of heat-dissipating air ducts (22) are all disposed on the first plate surface (211), the heat-dissipating air ducts (22) comprise a first air duct (221) and a second air duct (222) that are interconnected, the first air duct (221) extending along a first direction, the second air duct (222) extending along a second direction, the first direction and the second direction being disposed at an angle; A control device (3), comprising a circuit board (31), and a first heating device (32) and a second heating device (33) both electrically connected to the circuit board (31); the circuit board (31) and the heat-conducting base plate (21) are stacked along the plate thickness direction, and the circuit board (31) and the heat-conducting base plate (21) are fixedly connected; the first heating device (32) and the second heating device (33) are both located between the second plate surface (212) and the circuit board (31); and along the plate thickness direction, the first heating device (32) corresponds to the position of the first air duct (221), and the second heating device (33) corresponds to the position of the second air duct (222); A fan (4) is installed on the first plate surface (211); the fan (4) is opposite to the air inlet of the first air duct (221) and is used to blow air into the first air duct (221).

2. The servo driver according to claim 1, characterized in that: The servo driver further comprises a first fastening screw (51), wherein the first fastening screw (51) passes through the circuit board (31) and the first heating element (32) in sequence and is fixedly connected to the second board surface (212); and / or, The servo driver further comprises a second fastening screw (52), wherein the second fastening screw (52) passes through the circuit board (31) and the second heating element (33) in sequence and is fixedly connected to the second board surface (212).

3. The servo driver according to claim 1, characterized in that: The first heating element (32) is in contact with the second plate surface (212), and the surface where the first heating element (32) and the second plate surface (212) are in contact is coated with thermally conductive silicone grease; and / or, The second heating device (33) is in contact with the second plate surface (212), and a thermally conductive silicone grease is applied on the surface where the second heating device (33) and the second plate surface (212) are in contact.

4. The servo driver according to claim 1, characterized in that: The servo drive further comprises an insulating heat-conducting pad (6); The insulating thermal pad (6) is clamped between the first heating device (32) and the second board surface (212); and / or the insulating thermal pad (6) is clamped between the second heating device (33) and the second board surface (212).

5. The servo driver according to any one of claims 1 to 4, characterized in that: The first heating device (32) and the second heating device (33) are both soldered to the circuit board (31); the first heating device (32) is one of a rectifier bridge and a power module; and the second heating device (33) is the other of the rectifier bridge and the power module.

6. The servo driver according to any one of claims 1 to 4, characterized in that: The heat sink (2) further comprises: a side plate (23), the side plate (23) being detachably connected to the housing (1), the side plate (23) being vertically connected to the heat-conducting bottom plate (21), and the side plate (23) and the housing (1) jointly forming a receiving space (7) for receiving the control device (3); A plurality of first heat dissipation plates (24), each of which is fixedly connected to the first plate surface (211), and the first air duct (221) is formed between adjacent first heat dissipation plates (24); A plurality of second heat dissipation plates (25) are all fixedly connected to the first plate surface (211), and each of the second heat dissipation plates (25) is parallel to the side plate (23); a plurality of first heat dissipation plates (24) are connected to a plurality of second heat dissipation plates (25) in a one-to-one correspondence at an angle; a second air duct (222) is formed between adjacent second heat dissipation plates (25), and the lengths of the plurality of first heat dissipation plates (24) increase successively in a direction away from the side plate (23).

7. The servo driver according to claim 6, characterized in that: The shell (1) is a cubic structure, and an air inlet (11) and an air outlet (12) are respectively provided on two opposite sides of the shell (1), and an opening (13) is also provided on the shell (1) between the air inlet (11) and the air outlet (12), and the side plate (23) blocks the opening (13); The heat sink (2) further comprises a plurality of third heat sinks (26), the plurality of third heat sinks (26) being fixedly connected to the first plate surface (211) and being located on a side of the fan (4) away from the first air duct (221), the plurality of third heat sinks (26) being arranged at intervals and extending out of the accommodating space (7) from the air inlet (11), and the ends of the plurality of second heat sinks (25) away from the fan (4) extending out of the accommodating space (7) from the air outlet (12).

8. The servo driver according to claim 6, characterized in that: The heat sink (2) further comprises a fourth heat sink (27) adjacent to the side plate (23); the fourth heat sink (27) is fixedly connected to the first plate surface (211); the fourth heat sink (27) and the side plate (23) are arranged in parallel and spaced apart; an auxiliary heat dissipation duct (223) is formed between the fourth heat sink (27) and the side plate (23).

9. The servo driver according to any one of claims 1 to 4, characterized in that: The heat sink (2) further comprises a mounting platform (28) fixedly connected to the first plate surface (211), and the control device (3) further comprises a braking resistor (34), the braking resistor (34) being fixed to the mounting platform (28), and the braking resistor (34) being electrically connected to the circuit board (31) via a connecting wire.

10. The servo driver according to any one of claims 1 to 4, characterized in that: The heat sink (2) further comprises two spaced-apart limit blocks (29), the two limit blocks (29) being fixedly connected to the first plate surface (211), and the fan (4) being embedded between the two limit blocks (29).

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