Servo driver

Abstract

The utility model discloses a servo driver, and relates to the technical field of servo drivers, the servo driver comprises a pedestal, a housing, a power board and a heat radiation part, a separation plate is formed on the pedestal, and one end of the pedestal is provided with a baffle plate; an opening cavity is formed in the shell, the baffle is installed in the opening cavity, the partition plate is arranged in the opening cavity to divide the opening cavity into a first heat dissipation cavity and a second heat dissipation cavity, heat dissipation holes, an air inlet and an air outlet are formed in the shell, the air inlet and the air outlet are formed in the two sides of the shell respectively, and the heat dissipation holes are communicated with the first heat dissipation cavity. The air inlet and the air outlet are communicated with the second heat dissipation cavity; a power module is formed on the power board, and the power module is arranged in the second heat dissipation cavity; the heat dissipation component is installed on the base and arranged in the second heat dissipation cavity. The opening cavity is divided into the first heat dissipation cavity and the second heat dissipation cavity according to the arrangement position of the power module on the power board, and different heat dissipation methods are adopted for different areas, so that the heat dissipation efficiency can be effectively improved.

Description

Technical Field

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

[0002] Servo drives are widely used in industrial control. While previously imported, they have become increasingly popular in recent years, with domestic manufacturers increasingly seeking to replace them. Competition among domestic manufacturers has intensified, driving down costs. Furthermore, the miniaturization of equipment has also placed higher demands on the size of servo drives.

[0003] Most existing drivers have complex structures, and heat-generating components dissipate heat through heat sinks. However, this heat dissipation method has insufficient heat dissipation performance and poor overall heat dissipation effect.

[0004] Therefore, it is necessary to provide a new servo driver to solve the above technical problems. Utility Model Content

[0005] The main purpose of the utility model is to provide a servo driver, aiming to improve the technical problem of poor heat dissipation effect of the driver in the prior art.

[0006] To achieve the above object, the present invention provides a servo driver, comprising:

[0007] A base, wherein a partition plate is formed on the base, and a baffle is provided at one end of the base;

[0008] A housing, wherein an open cavity is formed inside the housing, the baffle is installed in the open cavity, the partition plate is placed in the open cavity to separate the open cavity into a first heat dissipation cavity and a second heat dissipation cavity, the baffle forms a third heat dissipation cavity, the third heat dissipation cavity is used to communicate with the open cavity and the outside, the housing is formed with heat dissipation holes, an air inlet and an air outlet, the air inlet and the air outlet are respectively arranged on both sides of the housing, the heat dissipation holes are communicated with the first heat dissipation cavity, and the air inlet and the air outlet are both communicated with the second heat dissipation cavity;

[0009] a power board, wherein a power module is formed on the power board, and the power module is disposed in the second heat dissipation cavity;

[0010] A heat dissipation component is installed on the base and is arranged in the second heat dissipation cavity.

[0011] In one embodiment, the heat dissipation component includes a heat sink module, the heat sink module includes a mounting plate and a heat sink disposed on the mounting plate, and the power module is mounted on a side of the mounting plate facing away from the heat sink.

[0012] In one embodiment, the number of the heat sinks is plural, the plural heat sinks are arranged at intervals along the length direction of the mounting plate, and an air flow channel is formed between two adjacent heat sinks.

[0013] In one embodiment, positioning posts are formed on the base, positioning holes are formed on the mounting plate, and the positioning posts are installed in the positioning holes.

[0014] In one embodiment, first mounting holes are further formed on the mounting plate, the servo driver further includes fasteners, second mounting holes are formed on the base, and the fasteners are installed in the first mounting holes through the second mounting holes.

[0015] In one embodiment, the heat dissipation component further includes a fan, a mounting position is formed on the base, the mounting position is arranged on one side of the heat sink, the fan is installed in the mounting position, and the fan is used for conveying outside air to the second heat dissipation cavity through the air inlet.

[0016] In one embodiment, a convex block is arranged at the mounting position, a first fixing hole is formed on the convex block, the servo driver further includes a locking member, a second fixing hole is arranged on the fan, and the locking member is installed in the first fixing hole through the second fixing hole.

[0017] In one embodiment, a socket hole is formed on the base, the servo driver further includes a capacitor sleeve, the capacitor sleeve includes a shell and elastic clamping feet, the shell is installed in the socket hole and extends out of the socket hole, the number of the elastic clamping feet is at least two, a through hole is formed on the shell, the elastic clamping feet are arranged at one end of the shell, and the two elastic clamping feet are evenly distributed along the contour of the outer shell, a capacitor is formed on the power board, the distance between the two elastic clamping feet is smaller than the outer diameter of the capacitor, and the capacitor is installed in the through hole and extends out of the through hole to be clamped with the two elastic clamping feet.

[0018] In one embodiment, the servo driver further includes a wind guiding plate, the wind guiding plate is arranged on the base and located between the fan and the heat sink, and the wind guiding plate is used for guiding the wind blown out by the fan to the capacitor.

[0019] In one embodiment, a third heat dissipation cavity is formed on the baffle, the third heat dissipation cavity is used for communicating with the open cavity and the outside, the servo driver further includes a power resistor, the power resistor is installed in the third heat dissipation cavity, and the power resistor is used for being electrically connected with the braking circuit of the servo motor.

[0020] In the above solution, the servo driver includes a base, a housing, a power board, and a heat dissipation component. A partition board is formed on the base, and a baffle is provided at one end of the base. An open cavity is formed inside the housing. The baffle is installed in the open cavity, and the partition board is placed in the open cavity to divide the open cavity into a first heat dissipation cavity and a second heat dissipation cavity. The housing is formed with heat dissipation holes, an air inlet, and an air outlet. The air inlet and the air outlet are respectively provided on both sides of the housing. The heat dissipation holes communicate with the first heat dissipation cavity, and both the air inlet and the air outlet communicate with the second heat dissipation cavity. A power module is formed on the power board, and the power module is arranged in the second heat dissipation cavity. The heat dissipation component is installed on the base and is arranged in the second heat dissipation cavity. Specifically, after installing the power board on the base, then install the base in the open cavity, install the baffle in the open cavity, and close the open cavity. In this way, the partition board on the base and the base will divide the open cavity into a first heat dissipation cavity and a second heat dissipation cavity. Heat dissipation holes are formed on the housing opposite to the first heat dissipation cavity, so that the temperature in the first heat dissipation cavity will be discharged from the heat dissipation holes, thus reducing the temperature in the first heat dissipation cavity. Air inlets and air outlets are formed on the housing at the corresponding positions of the second heat dissipation cavity. Since the power module is arranged in the second heat dissipation cavity, the temperature in the second heat dissipation cavity is higher than that of the rest of the part. Therefore, the heat dissipation component is arranged in the second heat dissipation cavity, so that the heat dissipation component can dissipate heat for the second heat dissipation cavity, input cold air from the air inlet, and discharge hot air from the air outlet, thus being able to dissipate heat for the second heat dissipation cavity. By dividing the open cavity into a first heat dissipation cavity and a second heat dissipation cavity according to the setting position of the power module on the power board, the temperature of different regions in the open cavity can be better controlled, and different heat dissipation methods are adopted for different cavities, which can effectively improve the heat dissipation efficiency in the servo controller. And the operator can independently perform heat dissipation maintenance or upgrade on different regions in the open cavity, which helps to improve the reliability and maintainability of the entire heat dissipation system of the servo controller. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the servo driver provided by the present invention from one perspective;

[0023] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the servo driver provided by the present invention from another perspective;

[0024] Figure 3Cross-sectional view of the servo drive provided by the present utility model;

[0025] Figure 4 Exploded connection schematic diagram of the base and the fan provided by the present utility model;

[0026] Figure 5 Connection schematic diagram of the base and the heat sink module from one perspective provided by the present utility model;

[0027] Figure 6 Connection schematic diagram of the base and the heat sink module from another perspective provided by the present utility model;

[0028] Figure 7 Overall structure schematic diagram of the heat sink component provided by the present utility model;

[0029] Figure 8 Structure schematic diagram of the capacitor sleeve provided by the present utility model;

[0030] Figure 9 Connection schematic diagram of the base, the heat dissipation component and the power board provided by the present utility model.

[0031] Explanation of the reference numerals in the drawings:

[0032] 100, servo drive; 1, base; 2, housing; 3, power board; 4, heat dissipation component; 11, partition board; 12, baffle; 21, open cavity; 211, first heat dissipation cavity; 212, second heat dissipation cavity; 22, heat dissipation holes; 23, air inlet; 24, air outlet; 31, power module; 41, heat sink module; 411, mounting plate; 412, heat sink; 13, positioning post; 411a, positioning hole; 411b, first mounting hole; 5, fastener; 14, second mounting hole; 42, fan; 15, mounting position; 151, convex block; 151a, first fixing hole; 6, locking piece; 421, second fixing hole; 16, socket hole; 7, capacitor sleeve; 71, housing; 72, elastic clamping feet; 711, through hole; 32, capacitor; 8, air guide plate; 121, third heat dissipation cavity; 9, power resistor.

[0033] The realization, functional features and advantages of the object of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0037] Servo drives are widely used in the field of industrial control. In the previous years, imports were more common. In recent years, the situation of domestic substitution has been on the rise, competition among domestic manufacturers has become increasingly fierce, the requirements for cost have become tighter, and in addition, the miniaturization of equipment has also put forward higher requirements for the size of servo drives. Most of the existing drives have relatively complex structures, and heat-generating components are cooled through heat sinks. However, such a cooling method has insufficient heat dissipation performance and poor overall cooling effect.

[0038] Please refer to Figures 1 to 3, the present utility model provides a servo driver 100, which includes a base 1, a housing 2, a power board 3 and a heat dissipation component 4. A partition board 11 is formed on the base 1, and a baffle 12 is arranged at one end of the base 1. An open cavity 21 is formed inside the housing 2, the baffle 12 is installed in the open cavity 21, and the partition board 11 is placed in the open cavity 21 to divide the open cavity 21 into a first heat dissipation cavity 211 and a second heat dissipation cavity 212. The housing 2 is formed with heat dissipation holes 22, an air inlet 23 and an air outlet 24. The air inlet 23 and the air outlet 24 are respectively arranged on both sides of the housing 2. The heat dissipation holes 22 communicate with the first heat dissipation cavity 211, and both the air inlet 23 and the air outlet 24 communicate with the second heat dissipation cavity 212. A power module 31 is formed on the power board 3, and the power module 31 is arranged in the second heat dissipation cavity 212. The heat dissipation component 4 is installed on the base 1, and the heat dissipation component 4 is arranged in the second heat dissipation cavity 212. Specifically, after the power board 3 is installed on the base 1, then the base 1 is installed in the open cavity 21, the baffle 12 is installed in the open cavity 21, and the open cavity 21 is closed. In this way, the partition board 11 on the base 1 and the base 1 will divide the open cavity 21 into a first heat dissipation cavity 211 and a second heat dissipation cavity 212. Heat dissipation holes 22 are formed on the housing 2 opposite to the first heat dissipation cavity 211, so that the temperature in the first heat dissipation cavity 211 will be discharged from the heat dissipation holes 22, thus reducing the temperature in the first heat dissipation cavity 211. Air inlets 23 and air outlets 24 are formed on the housing 2 corresponding to the second heat dissipation cavity 212. Since the power module 31 is arranged in the second heat dissipation cavity 212, the temperature in the second heat dissipation cavity 212 is higher than that of the rest of the part. Therefore, the heat dissipation component 4 is arranged in the second heat dissipation cavity 212, so that the heat dissipation component 4 can dissipate heat for the second heat dissipation cavity 212. Cold air is input from the air inlet 23, and hot air is discharged from the air outlet 24, so that the second heat dissipation cavity 212 can be dissipated. By dividing the open cavity 21 into a first heat dissipation cavity 211 and a second heat dissipation cavity 212 according to the setting position of the power module 31 on the power board 3, the temperature of different regions in the open cavity 21 can be better controlled, and different heat dissipation methods are adopted for different cavities, which can effectively improve the heat dissipation efficiency in the servo controller. And the operator can independently perform heat dissipation maintenance or upgrade on different regions in the open cavity 21, which helps to improve the reliability and maintainability of the entire heat dissipation system of the servo controller.

[0039] Please refer to Figures 5 to 7 and Figure 9, in one embodiment, the heat dissipation component 4 includes a heat sink module 41. The heat sink module 41 includes a mounting plate 411 and heat sinks 412 disposed on the mounting plate 411. The power module 31 is mounted on the side of the mounting plate 411 facing away from the heat sinks 412. Specifically, the temperature generated by the power module 31 is transferred to the mounting plate 411 and then to the heat sinks 412. The heat sinks 412 dissipate the heat generated by the power module 31. Dissipating heat through the heat sinks 412 does not generate noise, has a long service life, and is not prone to failure. By increasing the area of the heat sinks 412 and improving the heat conduction path, the heat sinks 412 can effectively transfer heat from the heat source to the surrounding environment. The heat sinks 412 do not use any chemical refrigerants and are an environmentally friendly heat dissipation method.

[0040] Please refer to Figures 5 to 7 and Figure 9 , in one embodiment, the number of the heat sinks 412 is multiple. The multiple heat sinks 412 are spaced apart along the length direction of the mounting plate 411, and an air flow channel is formed between two adjacent heat sinks 412. By providing multiple heat sinks 412, the heat dissipation capacity can be further improved, and an air flow channel is also formed between two adjacent heat sinks 412, so that air can flow in the air flow channel to carry away the heat, which also improves the heat dissipation capacity.

[0041] Furthermore, the heat sinks 412 are generally formed by extrusion of metal materials, such as aluminum alloy, copper, etc. These metals have good heat conduction performance. The aluminum alloy material die-castings adopted in this solution are integrally formed by die-casting molds, and can effectively conduct heat from the heat source to the surface of the heat sinks 412. The surface of the heat sinks 412 generally adopts a fin-like structure, which can increase the surface area and thus enhance the heat dissipation effect. The basic principle of the heat sinks 412 working is heat conduction. When the heat source generates heat, the heat is conducted to the heat sinks 412 through a heat conduction medium (such as heat-conducting paste). The heat sinks 412 transfer the heat from the heat sinks 412 to the air through convective heat transfer with the surrounding air, thereby reducing the temperature of the heat source. In the process of the heat sinks 412 working, air plays a crucial role. The air contacts the surface of the heat sinks 412, absorbs heat and is heated. Since the density of the hot air is smaller, a convective flow of the hot air is formed, so that the surrounding cold air contacts the surface of the heat sinks 412 and continues to absorb heat, forming a flowing cycle of the hot air. This process of convective heat transfer continuously transfers the heat from the heat sinks 412 to the air, thereby achieving the heat dissipation effect.

[0042] Please refer to Figure 4 and Figure 5, in one embodiment, positioning posts 13 are formed on the base 1, positioning holes 411a are formed on the mounting plate 411, and the positioning posts 13 are installed in the positioning holes 411a. By providing the positioning posts 13 on the base 1 and corresponding positioning holes 411a on the mounting plate 411, the mounting plate 411 can be positioned, ensuring that the position of the mounting plate 411 does not shift, thereby ensuring that the position of the heat sink 412 does not shift and guaranteeing the heat dissipation effect.

[0043] Please refer to Figures 4 to 7 , in one embodiment, a first mounting hole 411b is further formed on the mounting plate 411, the servo drive 100 further includes a fastener 5, a second mounting hole 14 is formed on the base 1, and the fastener 5 is installed in the first mounting hole 411b through the second mounting hole 14. Specifically, after aligning the positioning hole 411a on the mounting plate 411 with the positioning post 13, the positioning post 13 is installed in the positioning hole 411a. At this time, the first mounting hole 411b will be aligned with the second mounting hole 14, and then the fastener 5 is installed in the first mounting hole 411b through the second mounting hole 14, thus fixing the mounting plate 411 on the base 1. Through this setting, the heat sink 412 can be fixed, and the operator can achieve quick installation and disassembly.

[0044] Please refer to Figure 4 and Figure 9 , in one embodiment, the heat dissipation component 4 further includes a fan 42, a mounting position 15 is formed on the base 1, the mounting position 15 is arranged on one side of the heat sink 412, the fan 42 is installed in the mounting position 15, and the fan 42 is used to convey the outside air to the second heat dissipation chamber 212 through the air inlet 23. Specifically, the power module 31 generates heat in this way, and then the heat is transferred to the mounting plate 411, and then the heat is transferred to the heat sink 412. By installing the fan 42 in the mounting position 15, the fan 42 will extract the outside air into the second heat dissipation chamber 212 through the air inlet 23. The outside air takes away the heat on the heat sink 412 through the heat sink 412 and then discharges from the air outlet 24. In this way, the air blown by the fan 42 will flow in the air flow channel, forming an air path convection, which can further improve the heat dissipation effect.

[0045] Please refer to Figures 4 to 6, in one embodiment, the installation position 15 is provided with a bump 151, and a first fixing hole 151a is formed on the bump 151. The servo driver 100 further includes a locking member 6. The blower 42 is provided with a second fixing hole 421, and the locking member 6 is installed in the first fixing hole 151a through the second fixing hole 421. Specifically, after placing the blower 42 at the installation position 15, align the first fixing hole 151a with the second fixing hole 421, and install the locking member 6 through the second fixing hole 421 in the first fixing hole 151a. In this way, the blower 42 is fixed on the base 1, ensuring that the blower 42 does not move and guaranteeing the heat dissipation effect.

[0046] Please refer to Figure 4 and Figure 5 , in one embodiment, the base 1 is formed with a socket hole 16. The servo driver 100 further includes a capacitor sleeve 7. The capacitor sleeve 7 includes a housing 71 and elastic feet 72. The housing 71 is installed in the socket hole 16 and extends out of the socket hole 16. The number of elastic feet 72 is at least two. A through hole 711 is formed in the housing 71. The elastic feet 72 are arranged at one end of the housing 71, and the two elastic feet 72 are evenly distributed along the contour of the outer shell 2. A capacitor 32 is formed on the power board 3. The distance between the two elastic feet 72 is smaller than the outer diameter of the capacitor 32. The capacitor 32 is installed in the through hole 711 and extends out of the through hole 711 to be clamped with the two elastic feet 72. Specifically, the operator installs the capacitor 32 in the through hole 711. The capacitor sleeve 7 can achieve a good insulation effect. The capacitor 32 extends out of the through hole 711 and is clamped with the elastic feet 72. The capacitor 32 will cause the two elastic feet 72 to expand outwards, deforming the elastic feet 72. In this way, the two elastic feet 72 will generate a restoring force applied to the central axis of the capacitor 32, thus clamping the capacitor 32 to prevent the capacitor 32 from detaching from the through hole 711. In this embodiment, the number of elastic feet 72 is four, and the four elastic feet 72 are evenly distributed along the contour of the outer shell 2. The diameter of the circle formed by the four elastic feet 72 is smaller than the outer diameter of the capacitor 32.

[0047] Please refer to Figure 4 and Figure 5 , in one embodiment, the servo driver 100 further includes a wind deflector 8. The wind deflector 8 is arranged on the base 1 and is located between the blower 42 and the heat sink 412. The wind deflector 8 is used to guide the wind blown out by the blower 42 to the capacitor 32. Specifically, the base 1 is provided with the wind deflector 8, and the wind deflector 8 is arranged towards the capacitor 32. In this way, part of the wind from the blower 42 can be guided towards the capacitor 32, so that the heat generated by the capacitor 32 can be discharged to dissipate heat from the capacitor 32.

[0048] Please refer to Figures 3 to 6 and Figure 9, in one embodiment, the baffle 12 is formed with a third heat dissipation cavity 121, and the third heat dissipation cavity 121 is used to communicate with the open cavity 21 and the outside. The servo driver 100 further includes a power resistor 9, and the power resistor 9 is installed in the third heat dissipation cavity 121. The power resistor 9 is used to be electrically connected to the braking circuit of the servo motor. Specifically, the power resistor 9 plays a very important role, mainly for aspects such as energy consumption, voltage regulation, and current limitation. In this way, the power resistor 9 also generates heat during operation. The wind blown by the fan 42 flows from the second heat dissipation cavity 212 into the third heat dissipation cavity 121, and then flows out from the third heat dissipation cavity 121 to the outside. In this way, the heat generated by the power resistor 9 will be taken away to dissipate heat for the power resistor 9.

[0049] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A servo driver, characterized in that, include: A base, wherein a partition plate is formed on the base, and a baffle is provided at one end of the base; A housing, wherein an open cavity is formed inside the housing, the baffle is mounted on the open cavity, and the partition plate is placed in the open cavity to separate the open cavity into a first heat dissipation cavity and a second heat dissipation cavity. The housing is formed with heat dissipation holes, an air inlet, and an air outlet, the air inlet and the air outlet are respectively arranged on both sides of the housing, the heat dissipation holes are in communication with the first heat dissipation cavity, and the air inlet and the air outlet are both in communication with the second heat dissipation cavity; a power board, wherein a power module is formed on the power board, and the power module is disposed in the second heat dissipation cavity; A heat dissipation component is installed on the base and is arranged in the second heat dissipation cavity.

2. The servo driver according to claim 1, characterized in that, The heat dissipation component includes a heat sink module, which includes a mounting plate and a heat sink arranged on the mounting plate. The power module is mounted on a side of the mounting plate away from the heat sink.

3. The servo driver according to claim 2, wherein There are multiple heat sinks, which are spaced apart along the length direction of the mounting plate, and an air flow channel is formed between two adjacent heat sinks.

4. The servo driver according to claim 2, wherein A positioning column is formed on the base, a positioning hole is formed on the mounting plate, and the positioning column is installed in the positioning hole.

5. The servo driver according to claim 4, wherein A first mounting hole is further formed on the mounting plate. The servo driver further includes a fastener. A second mounting hole is formed on the base. The fastener passes through the second mounting hole and is mounted on the first mounting hole.

6. The servo driver according to any one of claims 2 to 5, characterized in that The heat dissipation component also includes a fan. The base is formed with a mounting position, and the mounting position is arranged on one side of the heat sink. The fan is installed at the mounting position, and the fan is used to transport external air to the second heat dissipation cavity through the air inlet.

7. The servo driver according to claim 6, wherein, The mounting position is provided with a protrusion, a first fixing hole is formed on the protrusion, the servo driver further includes a locking member, the fan is provided with a second fixing hole, and the locking member passes through the second fixing hole and is installed in the first fixing hole.

8. The servo driver according to claim 6, wherein The base is formed with a socket hole, the servo drive also includes a capacitor sleeve, the capacitor sleeve includes a shell and an elastic clamping foot, the shell is installed in the socket hole and extends out of the socket hole, the number of the elastic clamping feet is at least two, the shell is formed with a through hole, the elastic clamping foot is arranged at one end of the shell, and the two elastic clamping feet are evenly distributed along the contour of the shell, a capacitor is formed on the power board, the spacing between the two elastic clamping feet is smaller than the outer diameter of the capacitor, the capacitor is installed in the through hole and extends out of the through hole to be clamped with the two elastic clamping feet.

9. The servo driver according to claim 8, wherein The servo driver further includes an air guide plate, which is arranged on the base and located between the fan and the heat sink. The air guide plate is used to guide the wind blown out by the fan to the capacitor.

10. The servo driver according to claim 1, characterized in that, The baffle forms a third heat dissipation cavity, which is used to communicate with the open cavity and the outside world. The servo driver also includes a power resistor, which is installed in the third heat dissipation cavity and is used to be electrically connected to the brake circuit of the servo motor.

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