Servo motor and servo system

Abstract

A servo motor and servo system are disclosed, relating to the field of motor technology. The servo motor includes: a housing comprising a first cavity and a second cavity assembled at the end of the first cavity; the first cavity houses a stator, and the second cavity houses an encoder; the stator has a power lead-out portion, and the encoder has a signal lead-out wire; a monitoring unit located within the second cavity; the monitoring unit has a wiring portion, one end of which is detachably connected to the power lead-out portion, and the other end of which is electrically connected to an intermediate conductive element; and a socket disposed on the second cavity; the intermediate conductive element and the signal lead-out wire are both electrically connected to the socket. This design helps reduce the number of sockets on the motor, simplifies the wiring between the servo motor and the driver, and allows the cable connecting the servo motor and the driver to be directly plugged into the socket during assembly, thus improving installation efficiency.

Description

Technical Field

[0001] This application relates to the field of motor technology, specifically to a servo motor and servo system. Background Technology

[0002] A servo system integrates a servo motor, a driver, and a controller. The rotor speed of the servo motor can be controlled by the input signal and can respond quickly. As the actuator in the servo system, it can convert the received electrical signal into angular displacement or angular velocity output on the motor shaft. It has characteristics such as small electromechanical time constant and high linearity. The power supply of the servo motor can be provided by the driver, and the input signal of the servo motor can be issued by the controller. Therefore, the servo motor, driver, and controller need to be connected through a lot of cables and connectors. This results in complex wiring and low connection stability between the servo motor and the driver / controller, which affects the efficiency of installation and maintenance, as well as the working stability of the servo system. Utility Model Content

[0003] This application provides a servo motor and servo system that can solve the problem of complex wiring in servo systems.

[0004] According to one aspect of this application, one embodiment provides a servo motor, comprising:

[0005] The housing includes a first cavity portion and a second cavity portion assembled at an end of the first cavity portion, the first cavity portion accommodating a stator, the second cavity portion accommodating an encoder, the stator having a power lead-out portion, and the encoder having a signal lead-out portion;

[0006] The monitoring unit is located inside the second cavity. The monitoring unit is provided with a wiring part. One end of the wiring part is detachably connected to the power lead-out part, and the other end of the wiring part is electrically connected to an intermediate conductive element.

[0007] A socket is provided on the second cavity, and the intermediate conductive element and the signal lead are both electrically connected to the socket.

[0008] In one embodiment, the housing includes a main body and an end cap connected to one end of the main body. The main body is the first cavity portion, the stator is fixed inside the main body, and the end cap has a through hole for the power lead to extend out of the first cavity portion.

[0009] In one embodiment, the power lead-out portion includes a pin that extends axially along the stator, with the end of the pin passing through the through hole and protruding from the end face of the end cover. The wiring portion is provided with a socket, and the end of the pin is inserted into the socket to detachably connect the wiring portion to the power lead-out portion.

[0010] In one embodiment, the monitoring unit is fixed inside the second cavity, and the position of the monitoring unit corresponds to the position of the through hole, so that the pin is automatically aligned and inserted into the hole when the second cavity is assembled.

[0011] In one embodiment, the housing further includes a cover connected to the end cap. The cover includes a ring and a cover plate. The ring is located between the end cap and the cover plate. The ring and the cover plate enclose the second cavity. The side wall of the ring is provided with a wire outlet hole. The socket is fixed to the outside of the ring and covers the wire outlet hole. The intermediate conductive element and the signal lead wire are electrically connected to the socket through the wire outlet hole.

[0012] In one embodiment, the monitoring unit includes an insulator, the wiring portion is disposed within the insulator, and a fuse is also disposed within the insulator, the fuse being connected in series with the wiring portion.

[0013] In one embodiment, the monitoring unit further includes a signal monitoring element for monitoring current, voltage, or temperature, and the signal monitoring element is electrically connected to the socket.

[0014] In one embodiment, the socket includes a base, and a first connector and a second connector disposed within the base. The base has a plug-in interface. One end of the first connector is electrically connected to the intermediate conductive element, and the other end is located in the plug-in interface for external power supply. One end of the second connector is electrically connected to the signal lead-out line, and the other end is located in the plug-in interface for external signal supply.

[0015] According to another aspect of this application, one embodiment provides a servo system including a driver and a servo motor as described above, wherein the socket is electrically connected to the driver via a cable.

[0016] In one embodiment, a plug is provided at one end of the cable, and the plug is inserted and fixed to the socket. The plug includes a power plug and a signal plug. The socket includes a base and a first plug and a second plug disposed in the base. One end of the first plug is electrically connected to the intermediate conductive element, and the other end is correspondingly plugged into the power plug. One end of the second plug is electrically connected to the signal lead, and the other end is correspondingly plugged into the signal plug.

[0017] The servo motor and servo system according to the above embodiments include a monitoring unit and a socket. The monitoring unit is located inside the second cavity, and the socket is disposed on the second cavity. The socket is electrically connected to the power lead-out part through the monitoring unit, and the socket is electrically connected to the signal lead-out line. This helps to reduce the number of connectors on the motor and the number of cables connected to the motor. This simplifies the wiring between the servo motor and the driver and controller in the servo system, reduces the potential failure points in the servo system, and helps to improve installation and maintenance efficiency, as well as the working stability and reliability of the servo system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a servo motor according to one embodiment;

[0019] Figure 2 This is a cross-sectional structural diagram of a servo motor according to one embodiment;

[0020] Figure 3 A schematic diagram of an embodiment of an end cap having a through hole;

[0021] Figure 4 This is a schematic diagram of the structure of the second cavity portion according to one embodiment;

[0022] Figure 5 This is a schematic diagram of the structure of a socket according to one embodiment;

[0023] Figure 6 This is a schematic diagram of the structure of a cable plug according to one embodiment;

[0024] Figure 7 This is a schematic diagram of a cable plug being inserted into a socket according to one embodiment;

[0025] Explanation of reference numerals in the attached figures:

[0026] 1-First cavity section; 2-Second cavity section; 201-Ring body; 202-Cover body; 203-Outlet hole; 3-End cap; 4-Socket; 401-Interface; 402-Second connector; 403-First connector; 5-Stator; 6-Power lead-out section; 7-Monitoring unit; 8-Intermediate conductive component; 9-Encoder; 10-Signal lead-out line; 11-Cable; 1101-Plug; 1102-Signal connector; 1103-Power connector. Detailed Implementation

[0027] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0028] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0029] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0030] In servo systems, servo motors, drivers, and controllers are connected via numerous cables and connectors, resulting in complex wiring and low connection stability. This impacts installation and maintenance efficiency, as well as the overall stability of the servo system. To address this, this application introduces a monitoring unit within the motor, located in a second cavity. A socket is situated on the second cavity and electrically connected to both the power supply and signal leads via the monitoring unit. This reduces the number of connectors and cables on the motor, simplifying the wiring between the servo motor and driver / controller, reducing potential failure points, and improving installation and maintenance efficiency, as well as the system's stability and reliability.

[0031] The following describes some embodiments of the servo motor provided in this application with reference to the accompanying drawings.

[0032] Please see Figures 1 to 5 This application provides a servo motor, including a housing, a monitoring unit, and a socket, as well as other functional components as needed, which are described in detail below.

[0033] like Figures 1-4 As shown, the housing in this embodiment includes a first cavity 1 and a second cavity 2 assembled at the end of the first cavity 1. The first cavity 1 houses a stator 5, and the second cavity 2 houses an encoder 9. The stator 5 has a power lead-out portion 6, and the encoder 9 has a signal lead-out line 10.

[0034] It is understood that the housing in this application can be made of metal, plastic, or other materials. Both the first cavity 1 and the second cavity 2 in this application have cavities capable of accommodating components. In this embodiment, the specific assembly method between the first cavity 1 and the second cavity 2 is not limited; for example, it can be, but is not limited to, a screw connection. The power supply lead-out portion 6 of the stator 5 in this application has positive and negative terminals. When the servo motor is a three-phase motor, the power supply lead-out portion 6 may include a neutral wire lead-out terminal, a U-phase lead-out terminal, a V-phase lead-out terminal, and a W-phase lead-out terminal. This is merely an example; the specific number of lead-out terminals in the power supply lead-out portion 6 can be set as needed. This application does not specifically limit the encoder 9; it can be an optical encoder or a magnetic encoder. The encoder 9 can monitor parameters such as current, speed, and the relative position of the shaft in the circumferential direction in real time during motor operation, so as to control the operating status of the motor or system in real time, thereby realizing servo control. This embodiment does not specifically limit the assembly of the encoder 9 within the motor; a conventional assembly method can be used.

[0035] like Figure 2 As shown, in this embodiment, the monitoring unit 7 is located inside the second cavity 2. The monitoring unit 7 is provided with a wiring part (not shown in the figure). One end of the wiring part is detachably connected to the power lead-out part 6, and the other end of the wiring part is electrically connected to the intermediate conductive member 8. The socket 4 is provided on the second cavity 2, and the intermediate conductive member 8 and the signal lead-out line 10 are both electrically connected to the socket 4.

[0036] It is understood that the wiring part and the power lead-out part 6 are detachably connected, meaning that the wiring part and the power lead-out part 6 can switch between a connected state and a disconnected state. In the connected state, the wiring part and the power lead-out part 6 are electrically connected; in the disconnected state, the wiring part and the power lead-out part 6 are electrically disconnected. In this embodiment, the wiring part can be made of conductive metal. The intermediate conductive element 8 in this embodiment is used for electrical connection with the socket 4. The intermediate conductive element 8 can be a pin (PIN pin), which connects to the socket 4 through insertion, or it can be a wire, which connects to the socket 4 through crimping. The wiring part and the intermediate conductive element 8 can be directly electrically connected, or they can be indirectly connected through other conductive components. In the case of direct contact connection, the wiring part and the intermediate conductive element 8 can be an integral structure, or they can be connected and fixed to form an electrical connection. This embodiment does not limit the electrical connection method between the signal lead-out line 10 and the socket 4; any electrical connection between the signal lead-out line 10 and the socket 4 can be achieved. Furthermore, the aforementioned connector, i.e., the plug-in component, can be a connector and a socket.

[0037] The servo motor in the above embodiment includes a monitoring unit 7 and a socket 4. The monitoring unit 7 is located inside the second cavity 2, and the socket 4 is disposed on the second cavity 2. The socket 4 is electrically connected to the power lead-out part 6 through the monitoring unit 7, and the socket 4 is electrically connected to the signal lead-out line 10. This helps to reduce the number of connectors on the motor and the number of cables 11 connected to the motor. This simplifies the wiring between the servo motor and the driver and controller in the servo system, reduces the potential points of failure in the servo system, and helps to improve installation and maintenance efficiency, as well as the working stability and reliability of the servo system.

[0038] In one embodiment, such as Figures 1-3 As shown, the housing includes a main body and an end cap 3 connected to one end of the main body. The main body is a first cavity portion 1, and the stator 5 is fixed inside the main body. The end cap 3 has a through hole for the power lead-out portion 6 to extend out of the first cavity portion 1. This embodiment does not limit the specific connection method between the main body and the end cap 3; for example, it can be fixed by screw connection, but is not limited to that. One end of the main body connected to the end cap 3 can be open, and the end cap 3 can cover this openness, facilitating the assembly of the stator 5 inside the main body. The power lead-out portion 6 extends out of the first cavity portion 1 through the through hole, which is beneficial for the electrical connection between the power lead-out portion 6 and the wiring portion of the monitoring unit 7. In some embodiments, the first cavity portion 1 can also have other structures, such as a structure where two halves are joined together, with the ends of this structure being closed, and one half of the end having a through hole for the power lead-out portion 6 to extend out. This embodiment does not specifically limit the outer contour shape of the first cavity portion 1; for example, it can be rectangular or circular.

[0039] In one embodiment, the power lead-out portion 6 includes a pin extending axially along the stator 5. The end of the pin passes through a through hole and protrudes from the end face of the end cover 3. The wiring portion has a socket, and the end of the pin is inserted into the socket to detachably connect the wiring portion to the power lead-out portion 6. In this embodiment, the pin can be, but is not limited to, a three-phase pin. In this embodiment, the number of pins corresponds one-to-one with the number and position of the sockets. This embodiment does not impose specific limitations on the shape of the pins and sockets; for example, they can be cylindrical or prismatic. The power lead-out portion 6 uses a pin to connect to the wiring portion, making assembly simple and quick, and improving assembly efficiency. Having the end of the pin pass through the through hole and protrude from the end face of the end cover 3 makes the insertion position clearly visible, which also facilitates assembly. In some embodiments, the end of the pin may not protrude from the end face of the end cover 3; the wiring portion of the monitoring unit 7 can be inserted into the through hole of the end cover 3 and connected to the pin. In some embodiments, the power lead-out part 6 can also be electrically connected to the wiring part in other ways. The power lead-out part 6 has a lead-out terminal, which can be crimped by a wire screw. In some application scenarios, the power lead-out part 6 can also be quickly wired by crimping with an elastic sheet.

[0040] In one embodiment, when the power lead-out portion 6 includes a pin, the monitoring unit 7 can be fixed inside the second cavity portion 2. The monitoring unit 7 corresponds to the position of the through hole, so that the pin and the socket are automatically aligned and inserted when the second cavity portion 2 is assembled. After the monitoring unit 7 is fixed, the position of its wiring portion is also fixed, so that the wiring portion corresponds to the position of the through hole, and the wiring portion corresponds to the pin extending from the through hole. When the second cavity portion 2 is assembled onto the first cavity portion 1, the pin and the socket of the wiring portion can be automatically aligned, so that the pin can be smoothly inserted into the wiring portion. There is no need for an additional step of connecting the power lead-out portion 6 and the monitoring unit 7, which helps to reduce assembly steps and improve assembly efficiency. Moreover, fixing the monitoring unit 7 in the second cavity portion 2 also helps to improve the integration of the motor. In some embodiments, the monitoring unit 7 can also be movably disposed in the second cavity portion 2. In this case, the wiring portion of the monitoring unit 7 can be electrically connected to the power lead-out portion 6 first, and then the second cavity portion 2 can be assembled onto the first cavity portion 1.

[0041] In one embodiment, such as Figure 1 , Figure 2 , Figure 4As shown, the housing also includes a cover connected to the end cap 3. The cover includes a ring 201 and a cover plate 202. The ring 201 is located between the end cap 3 and the cover plate 202. The ring 201 and the cover plate 202 enclose a second cavity 2. The side wall of the ring 201 is provided with a wire outlet hole 203. The socket 4 is fixed to the outside of the ring 201 and covers the wire outlet hole 203. The intermediate conductive element 8 and the signal lead 10 are electrically connected to the socket 4 through the wire outlet hole 203. The ring 201 and the cover plate 202 enclose a second cavity 2. The end of the cover near the end cap 3 is open, that is, the first cavity 1 is provided on one side of the end cap 3, and the second cavity 2 is provided on the other side. This forms two independent cavities, which helps to simplify the structure of the housing and the wiring. This embodiment does not impose specific limitations on the connection method between the cover and the end cap 3. For example, it can be fixed by screw connection, but is not limited to it. This embodiment does not limit the outer contour shape of the cover; it can be the same as or different from the outer contour shape of the main body, for example, it can be rectangular or circular. This embodiment does not limit the material of the cover; it can be metal, plastic, or other materials. The cover includes a ring 201 and a cover plate 202, which facilitates the wiring arrangement inside the cover, making assembly easier and subsequent maintenance easier. This embodiment does not limit the fixing method of the socket 4 on the ring 201; for example, it can be fixed by screw connection, snap-fit, or adhesive. This embodiment does not limit the shape of the wire outlet hole 203 on the ring 201; it can be used for the intermediate conductive part 8 and the signal lead 10 to pass through. In some embodiments, the cover can also be other structures, such as an integral structure.

[0042] In one embodiment, the monitoring unit 7 includes an insulator, with a wiring portion disposed within the insulator. A fuse is also housed within the insulator, connected in series with the wiring portion. When the current exceeds a designed safety value, the fuse melts and breaks the current, protecting the circuit and improving motor reliability. In some applications, the fuse can be positioned between the wiring portion and the intermediate conductive component 8. After the fuse melts, the electrical connection between the wiring portion and the socket 4 is severed, thus cutting off the current. This embodiment does not limit the specific material of the fuse; any conductive and fusible metal wire is acceptable. The insulator in this embodiment can be made of insulating material, such as plastic. In some embodiments, a fuse may not be provided in the wiring unit; instead, the fuse can be placed in other parts of the motor's circuit structure, or it may be omitted altogether if necessary.

[0043] In one embodiment, the monitoring unit 7 is further provided with a signal monitoring element for monitoring current, voltage, or temperature, and the signal monitoring element is electrically connected to the socket 4. Monitoring current, voltage, or temperature through the signal monitoring element helps improve the control accuracy of the servo motor and its protection. The signal monitoring element's electrical connection to the socket 4 also enables synchronous multi-channel transmission of monitoring signals, further improving motor control accuracy. In this embodiment, the signal monitoring element can be a current sensor, voltage sensor, or temperature sensor. It can be housed within an insulator or mounted on an insulator. In some applications, the signal monitoring element can be other monitoring components, such as a vibration sensor for monitoring motor vibration. In some embodiments, the monitoring unit 7 may not have a signal monitoring element; instead, the signal monitoring element can be mounted on other structures or components within the motor.

[0044] In one embodiment, such as Figure 1 , Figure 2 , Figure 5 As shown, the socket 4 includes a base, and a first connector 403 and a second connector 402 disposed within the base. The base has a connector 401. One end of the first connector 403 is electrically connected to the intermediate conductive element 8, and the other end is located in the connector 401 for external power supply. One end of the second connector 402 is electrically connected to the signal lead 10, and the other end is located in the connector 401 for external signal supply. This forms an integrated socket 4 structure, with the first connector 403 and the second connector 402 simultaneously on the base. This reduces the number of motor components and improves the integration of the motor. During assembly, the plug of the cable 11 is simply plugged into the connector 401 of the socket 4, making assembly simple, quick, and less prone to errors, thus improving installation efficiency.

[0045] The servo motor in the above embodiment includes a monitoring unit 7 and a socket 4. The monitoring unit 7 is located inside the second cavity 2, and the socket 4 is disposed on the second cavity 2. The socket 4 is electrically connected to the power lead-out part 6 through the monitoring unit 7, and the socket 4 is electrically connected to the signal lead-out line 10. This helps to reduce the number of connectors on the motor and the number of cables 11 connected to the motor. This simplifies the wiring between the servo motor and the driver and controller in the servo system, reduces the potential points of failure in the servo system, and helps to improve installation and maintenance efficiency, as well as the working stability and reliability of the servo system.

[0046] Please see Figures 1 to 7 This application embodiment also provides a servo system, including a driver and a servo motor as described above, with the socket 4 electrically connected to the driver via a cable 11.

[0047] It is understood that the servo motor in this embodiment is the same as that in the above embodiments, and will not be described again here. The servo system in this embodiment may also include other structures or components, such as a controller. The controller can be used to set control parameters. The servo motor, driver, and controller can be integrated into a single device to form a highly integrated servo system.

[0048] In one embodiment, such as Figure 5 , Figure 6 , Figure 7 As shown, one end of cable 11 is provided with a plug 1101, which is plugged into and fixed to socket 4. Plug 1101 includes a power connector 1103 and a signal connector 1102. Socket 4 includes a base and a first connector 403 and a second connector 402 disposed within the base. One end of the first connector 403 is electrically connected to the intermediate conductive member 8, and the other end is correspondingly plugged into the power connector 1103. One end of the second connector 402 is electrically connected to the signal lead 10, and the other end is correspondingly plugged into the signal connector 1102. This plug 1101 is plugged into socket 4 in the servo motor, making the connection between the servo motor and the driver simple and quick, which helps improve installation efficiency. In this embodiment, the plug 1101 can be inserted into the socket 401 on the socket 4. The power plug 1103 and the signal plug 1102 of the plug 1101 can both be pins. The first plug 403 and the second plug 402 can be provided with corresponding sockets for the power plug 1103 and the signal plug 1102 to be inserted. Alternatively, the first plug 403 and the second plug 402 can be configured as pins, and the power plug 1103 and the signal plug 1102 can be provided with corresponding sockets for the first plug 403 and the second plug 402 to be inserted.

[0049] In the servo system provided in the above embodiment, the servo motor is equipped with a monitoring unit 7 and a socket 4. The monitoring unit 7 is located inside the second cavity 2, and the socket 4 is located on the second cavity 2. The socket 4 is electrically connected to the power lead-out part 6 through the monitoring unit 7, and the socket 4 is electrically connected to the signal lead-out line 10. This helps to reduce the number of connectors on the motor and the number of cables 11 connected to the motor. This simplifies the wiring between the servo motor and the driver and controller in the servo system, reduces the potential points of failure in the servo system, and helps to improve the efficiency of installation and maintenance, as well as the working stability and reliability of the servo system.

[0050] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.

Claims

1. A servo motor, characterized in that, include: The housing includes a first cavity portion and a second cavity portion assembled at an end of the first cavity portion, the first cavity portion accommodating a stator, the second cavity portion accommodating an encoder, the stator having a power lead-out portion, and the encoder having a signal lead-out portion; The monitoring unit is located inside the second cavity. The monitoring unit is provided with a wiring part. One end of the wiring part is detachably connected to the power lead-out part, and the other end of the wiring part is electrically connected to an intermediate conductive element. A socket is provided on the second cavity, and the intermediate conductive element and the signal lead are both electrically connected to the socket.

2. The servo motor as described in claim 1, characterized in that, The housing includes a main body and an end cap connected to one end of the main body. The main body is the first cavity portion, the stator is fixed inside the main body, and the end cap has a through hole for the power lead-out portion to extend out of the first cavity portion.

3. The servo motor as described in claim 2, characterized in that, The power lead-out portion includes a pin that extends along the axial direction of the stator. The end of the pin passes through the through hole and protrudes from the end face of the end cover. The wiring portion is provided with a socket, and the end of the pin is inserted into the socket to detachably connect the wiring portion to the power lead-out portion.

4. The servo motor as described in claim 3, characterized in that, The monitoring unit is fixed inside the second cavity, and the position of the monitoring unit corresponds to the position of the through hole, so that the pin and the hole are automatically aligned and inserted when the second cavity is assembled.

5. The servo motor as described in claim 2, characterized in that, The housing also includes a cover connected to the end cap. The cover includes a ring and a cover plate. The ring is located between the end cap and the cover plate. The ring and the cover plate enclose the second cavity. The side wall of the ring is provided with a wire outlet hole. The socket is fixed to the outside of the ring and covers the wire outlet hole. The intermediate conductive element and the signal lead wire are electrically connected to the socket through the wire outlet hole.

6. The servo motor as described in any one of claims 1-5, characterized in that, The monitoring unit includes an insulator, the wiring part is disposed within the insulator, and a fuse is also disposed within the insulator, the fuse being connected in series with the wiring part.

7. The servo motor as described in any one of claims 1-5, characterized in that, The monitoring unit is also equipped with a signal monitoring element for monitoring current, voltage or temperature, and the signal monitoring element is electrically connected to the socket.

8. The servo motor as described in any one of claims 1-5, characterized in that, The socket includes a base, and a first connector and a second connector disposed in the base. The base has a plug-in interface. One end of the first connector is electrically connected to the intermediate conductive element, and the other end is located in the plug-in interface for external power supply. One end of the second connector is electrically connected to the signal lead-out line, and the other end is located in the plug-in interface for external signal supply.

9. A servo system, characterized in that, Includes a driver and a servo motor as described in any one of claims 1-8, wherein the socket is electrically connected to the driver via a cable.

10. The servo system as described in claim 9, characterized in that, One end of the cable is provided with a plug, which is plugged into and fixed to the socket. The plug includes a power plug and a signal plug. The socket includes a base and a first plug and a second plug disposed in the base. One end of the first plug is electrically connected to the intermediate conductive element, and the other end is plugged into the power plug. One end of the second plug is electrically connected to the signal lead, and the other end is plugged into the signal plug.

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