Shielded joint

Abstract

This application relates to a shielded connector for simulating the output signal of a magnetic encoder. It includes a main body and an analog circuit. The main body has a plug-in end and a back end opposite to the plug-in end. The plug-in end has multiple plug points. The analog circuit is located on the back end and includes analog points connected one-to-one with the plug points. At least two analog points are shorted, and at least two analog points are connected via diodes. This shielded connector can reproduce encoder reference signals to meet the operational requirements of rapid maintenance and limited function retention of servo equipment. It has high compatibility, can be quickly deployed, and requires no additional equipment.

Description

Technical Field

[0001] This application relates to the field of signal control technology, and in particular to a shielded connector. Background Technology

[0002] Magnetic encoders (such as the MZ series) achieve motion control by detecting changes in magnetic fields. Due to their vibration and oil resistance, they are widely used in high-precision control systems such as machine tools and robots. Their working principle involves a spindle motor driving a magnetic code disk to rotate, generating a sine wave signal through the stator of the encoder head. After analog-to-digital conversion, the signal outputs position and speed feedback. In practical applications, damage to the encoder head can trigger servo system alarms (such as "73" sensor disconnection, "06" temperature disconnection, etc.). In such cases, shielding is necessary to degrade the equipment.

[0003] Traditional shielding solutions have significant drawbacks: First, they require dedicated motors and connecting cables for external shielding, which is inconvenient due to the bulky size of the auxiliary equipment and the complex and time-consuming wiring process. Second, cross-machine interconnection shielding not only requires nearby machines to be stopped and operated in conjunction, but may also cause production line capacity loss. Both of these solutions severely restrict maintenance efficiency in scenarios involving dozens of spindle failures per day. Traditional shielding solutions can also use shielded connectors to simulate encoder signals for shielding, but this has compatibility issues; for example, the interfaces of T / D series machine tools may differ, meaning one shielded connector may only be compatible with one type of interface. Utility Model Content

[0004] In view of the above, it is necessary to provide a shielded connector that can reproduce encoder reference signals to meet the operational requirements of rapid maintenance and limited function maintenance of servo equipment, with high compatibility, rapid deployment and no need for additional equipment.

[0005] This application provides a shielded connector for simulating the output signal of a magnetic encoder, including a main body and an analog circuit. The main body has a plug-in end and a back end disposed opposite to the plug-in end. The plug-in end is provided with a plurality of plug-in points. The analog circuit is disposed on the back end. The analog circuit includes analog points that are connected one-to-one with the plug-in points. At least two analog points are shorted and at least two analog points are connected through diodes.

[0006] In the shielded connector of this application, multiple analog points are connected by shorting or diodes to reproduce the encoder reference signal. This allows for shielding operations to be performed instead of the encoder for maintenance of servo equipment. Simultaneously, the reverse cutoff characteristic of the diode isolates the potential difference between multiple series interfaces, reducing the risk of cross-level short circuits. The forward conduction path of the diode can simulate the voltage of a specific plug-in point, thus enabling a single shielded connector to be compatible with multiple series of machine tools. In other words, the shielded connector of this application can reproduce the encoder reference signal to meet the operational requirements of rapid maintenance and limited function retention of servo equipment. It offers high compatibility, rapid deployment, and requires no additional equipment.

[0007] In some embodiments, at least two analog points are connected by resistors.

[0008] In some embodiments, the analog point includes a first return voltage point and a first supply voltage point, the first return voltage point and the first supply voltage point are shorted together, and the voltage of the first return voltage point and the first supply voltage point is 2.5V.

[0009] In some embodiments, the analog point includes a second return voltage point and a second supply voltage point, which are connected by a diode, and the voltage of the second return voltage point and the second supply voltage point is 0V.

[0010] In some embodiments, the analog point includes a third return voltage point and a third supply voltage point, which are connected by a diode, and the voltage of the third return voltage point and the third supply voltage point is 5V.

[0011] In some embodiments, the analog points include analog temperature signal points, and the second return voltage point, the third return voltage point, and the analog temperature signal point are interconnected by resistors.

[0012] In some embodiments, the diode is a unidirectional diode, and the reverse withstand voltage of the diode is greater than 24V.

[0013] In some embodiments, the diode is configured such that when it is turned on, an electrical signal flows from a second supply voltage point to a second return voltage point, and when it is turned on, an electrical signal flows from a third supply voltage point to a third return voltage point.

[0014] In some embodiments, the resistor is a temperature-sensitive resistor with a positive temperature coefficient and a resistance value greater than or equal to 47kΩ.

[0015] In some embodiments, a protective cover is also included, disposed at the back end, for protecting the analog circuitry. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the shielded connector according to an embodiment of this application.

[0017] Figure 2 This is a structural schematic diagram of the shielded connector from another perspective, representing an embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the structure of the analog circuit in an embodiment of this application.

[0019] Figure 4 This application Figure 3 Circuit diagram of the analog circuit in the embodiment.

[0020] Explanation of key component symbols:

[0021] 100. Shielded connector; 11. Main body; 12. Analog circuit; 13. Protective cover; 111. Plug-in terminal; 112. Back end; 1110. Plug-in point; 121. Analog point; 122. Diode; 123. Resistor.

[0022] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0023] In the description of the embodiments in this application, the words "exemplary," "or," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of the words "exemplary," "or," and "for example" is intended to present the relevant concepts in a specific manner.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in this application's specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. It should be understood that, unless otherwise stated, " / " in this application means "or". For example, A / B can mean A or B. "And / or" in this application is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. "At least one" refers to one or more. "More than one" refers to two or more. For example, at least one of a, b, or c can represent: a, b, c, a and b, a and c, b and c, and a, b, and c (seven cases).

[0025] It should also be noted that the terms "first" and "second" in the specification, claims and drawings of this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0026] Magnetic encoders, as core components of precision motion control systems (represented by the MZ series), have become indispensable position detection devices in high-precision equipment such as CNC machine tools and industrial robots due to their strong tolerance to harsh working conditions such as mechanical vibration and oil mist contamination. Their working logic is as follows: When the servo spindle drives the magnetic code disk to rotate, the built-in magnetic head assembly generates two orthogonal sine wave signals by detecting periodic magnetic field changes. After amplification, filtering, and analog-to-digital conversion by the signal conditioning circuit, real-time speed and position information is generated and transmitted back to the control system, forming the basis of closed-loop feedback regulation.

[0027] When a magnetic encoder experiences hardware failures such as a broken magnetic head or a detached wire, the control system will trigger a disconnection alarm (typically, a "73" sensor signal loss or a "06" temperature module malfunction), causing the entire machine to shut down. In machine tool maintenance scenarios, maintenance personnel need to quickly implement signal shielding operations to switch the system to a degraded operating mode to maintain basic processing functions. However, existing shielding solutions exhibit significant technical limitations: firstly, they use independent shielding devices, requiring additional dedicated analog motors and their matching wiring harnesses. This not only results in bulky auxiliary equipment affecting on-site mobility but also makes the complex wiring process excessively time-consuming for processing a single unit; secondly, they rely on cross-equipment collaborative operations, requiring nearby machines of the same model to suspend production and establish a physical connection channel. While this method can achieve temporary shielding, it severely restricts normal production capacity and can easily lead to significant losses due to production interruptions when multiple machines fail simultaneously.

[0028] While existing technologies include shielded connectors for direct encoder interface connections, they still face key technical bottlenecks in practical applications. Specifically, encoder signal interfaces designed by different manufacturers exhibit significant topological differences. Taking T / D series machine tools as an example, although their communication protocols remain compatible, the physical arrangement and electrical configuration of the core power supply pins exhibit asymmetrical characteristics—T-series models require a stable 5V power supply at pin 20, while D-series requires an equivalent circuit to be established at pin 12. Traditional shielded connectors only provide hard-connection points for a single machine model's interface, necessitating the use of multiple sets of connectors on-site, significantly increasing management complexity and operating costs. More critically, such solutions lack a potential isolation mechanism, making them highly susceptible to direct short circuits in the 0V / 5V power lines when incorrectly connecting interfaces of different specifications. This not only fails to achieve fault shielding but also exacerbates the risk of secondary equipment damage, further extending maintenance cycles and economic losses. For modern smart factories that need to handle dozens of equipment failures daily, this has become a critical bottleneck restricting operational efficiency.

[0029] Therefore, this application provides a shielded connector that can reproduce encoder reference signals to meet the operational requirements of rapid maintenance and limited function retention of servo devices. It offers high compatibility, rapid deployment, and requires no additional equipment. Some embodiments will be described below with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] Figure 1 This is a schematic diagram of the structure of the shielded connector 100 according to an embodiment of this application. Figure 2 This is a structural schematic diagram of the shielded connector 100 from another perspective, according to an embodiment of this application. Figure 3 This is a schematic diagram of the structure of the analog circuit 12 in an embodiment of this application. Figure 4 This application Figure 3 Circuit diagram of the analog circuit in the embodiment.

[0031] Please see Figure 1 This application provides a shielded connector 100, which can be used to simulate the output signal of a magnetic encoder. The shielded connector 100 may include a body 11 and an analog circuit 12, wherein the body 11 has a plug-in end 111 and a back end 112 disposed opposite to the plug-in end 111, such as... Figure 2 As shown, the plug-in terminal 111 is provided with multiple plug-in points 1110, which can be used to connect a simulated magnetic encoder to a servo device; the analog circuit 12 is located on the back end 112, such as... Figure 3 or Figure 4 As shown, the analog circuit 12 may include analog points 121 connected one-to-one with the plug-in points 1110. At least two analog points 121 are shorted (e.g., pins 5 and 9), and at least two analog points 121 are connected through diodes 122 (e.g., pins 12 and 14). In the shielded connector 100 of this application, multiple analog points 121 are connected by shorting or diodes 122 to reproduce the encoder reference signal. This can replace the encoder to perform shielding operations for maintenance of servo equipment. At the same time, the reverse cutoff characteristic of diodes 122 is used to isolate the potential difference of multiple series (e.g., in the T series and D series, the 0V and 5V power supply voltages of pins 12 and 20 are interchanged, and pins 14 and 18 are switched) interfaces, which can reduce the risk of cross-level short circuits. The forward conduction path of diodes 122 can simulate the voltage of a specific plug-in point 1110, thereby making a single shielded connector 100 compatible with multiple series of machine tools.

[0032] In some embodiments, please refer to Figure 3 and Figure 4At least two analog points 121 in analog circuit 12 are connected by resistor 123. In this case, by connecting resistor 123 to at least two analog points 121, for example, by connecting a voltage divider circuit of resistor 123 in series between pin 12 and pin 18, a 0V logic reference can be re-established, thereby eliminating the temperature break-circuit alarm.

[0033] The shielded connector 100 simulates the output signal of the magnetic encoder for shielding. The technical principle is as follows: When measuring the sinusoidal signal at pins 5 and 6 of the JYA2 interface of the T-series encoder, a missing 2.5V reference voltage is found. This intermediate potential can be re-established by connecting a wire or soldering resistor 123, simulating the sinusoidal bias characteristics of the encoder in a stationary state. This causes the system to mistakenly interpret the signal as normal transmission, thus dispelling the motor sensor disconnection alarm. For the T-series pin 14 temperature signal missing 0V fault, the grounding logic at this point needs to be restored, while ensuring that pin 20 maintains a 5V power supply. Soldering resistor 123 forces pin 14 low to 0V, which can simulate a low-level feedback signal from the temperature sensor. For the D-series pin 18 temperature signal missing 0V problem, the voltage conflict between pin 12 (abnormally boosted to 5V) and pin 20 (correctly 0V) needs to be resolved.

[0034] In some embodiments, the plug point 1110 may be a pin. In other embodiments, the plug point 1110 may also be a socket. Additionally, the plug point 1110 may be detachably disposed on the body 11. For example, to facilitate disassembly, the plug end 111 may be detachably disposed on the body 11 to accommodate different plugging requirements by selecting either a pin or a socket type for the plug point 1110. Similarly, the analog point 121 may also be either a pin or a socket.

[0035] In some embodiments, please refer to Figure 3 The analog position 121 includes a first return voltage position and a first supply voltage position, which are shorted together. The voltage of the first return voltage position and the first supply voltage position is 2.5V. For example, the first return voltage position can be pin 5 or pin 6, and the first supply voltage position can be pin 9 or pin 10. In this case, shorting the return voltage and the supply voltage to form a 2.5V intermediate potential can reproduce the sinusoidal DC bias characteristics of the encoder when it is not in operation. This allows the servo system to identify the static position signal and suppress the motor lockup alarm caused by signal loss.

[0036] In some embodiments, please refer to Figure 3 and Figure 4The analog point 121 includes a second return voltage point and a second supply voltage point, which are connected by a diode 122. The voltages of the second return voltage point and the second supply voltage point are both 0V. For example, the second return voltage point can be pin 14, and the second supply voltage point can be pin 12. In this case, by turning on the diode 122, a specific point can be forcibly pulled down to 0V, simulating a low-level signal feedback loop. This allows for compatibility with the interface configuration of D-series machine tools that require a 0V signal trigger, eliminating the corresponding temperature disconnection alarm.

[0037] In some embodiments, please refer to Figure 3 and Figure 4 Analog point 121 may include a third return voltage point and a third supply voltage point, which are connected by diode 122. The voltages of the third return voltage point and the third supply voltage point are 5V. For example, the third return voltage point can be pin 18 and the third supply voltage point can be pin 20. In this case, by turning on diode 122 to raise the target point level to 5V, a high-potential power supply path can be rebuilt. This allows for compatibility with T-series machine tool interfaces that require a stable 5V power supply, maintaining the integrity of the encoder power signal.

[0038] In some embodiments, please refer to Figure 3 and Figure 4 The analog point 121 may include an analog temperature signal point (such as pin 16), a second return voltage point, a third return voltage point, and the analog temperature signal point, which are interconnected through resistor 123. In this case, connecting the temperature signal point and the power supply / return voltage node together through resistor 123 allows the temperature signal to dynamically shift with the main circuit voltage, thereby reducing the likelihood of the machine's temperature detection module misjudging line faults due to a fixed input signal.

[0039] In some embodiments, diode 122 is a unidirectional diode with a reverse withstand voltage greater than 24V. In this case, selecting a diode 122 with a reverse withstand voltage exceeding 24V can withstand electromagnetic interference and transient voltage surges, thereby improving the operational stability of analog circuit 12 in strong industrial electromagnetic environments.

[0040] In some embodiments, please refer to Figure 3 and Figure 4Diode 122 is configured such that when it is turned on, the electrical signal flows from the second supply voltage point to the second return voltage point, and when it is turned on, the electrical signal flows from the third supply voltage point to the third return voltage point. In this case, the diode 122 is preset to conduct unidirectionally from the supply point to the return point, which can block the interference path of reverse parasitic current. This ensures that the signal transmission direction is strictly matched with the machine interface logic, reducing the risk of signal crosstalk or short circuit (such as short circuit between pin 20 and pin 12).

[0041] In some embodiments, resistor 123 is a temperature-sensitive resistor with a positive temperature coefficient, and the resistance of resistor 123 is greater than or equal to 47kΩ. In this case, the low-level feedback signal of the temperature sensor can be simulated by the 47kΩ temperature-sensitive resistor. This allows the temperature signal point to be connected in parallel with the power supply / return voltage node through resistor 123, so that the temperature signal can dynamically shift with the main circuit voltage, reducing the risk of the temperature detection module of the machine misjudging line faults due to a fixed input signal.

[0042] It should be noted that the pins exemplified in the above embodiments are not the only embodiments of this application. In some embodiments, the number, sequence number, etc. of the above pins may be different depending on the type of magnetic encoder.

[0043] In some embodiments, the shape and size of the main body 11 can be set to mimic the external size of the magnetic encoder, thereby adapting to the plug-in requirements of the servo device.

[0044] In some embodiments, please refer to Figure 1 The shielded connector 100 may also include a protective cover 13, which is disposed on the back end 112 and is used to protect the analog circuit 12. In this case, by enclosing the area of ​​the analog circuit 12 with the protective cover 13, the corrosion of internal components by oil and dust can be reduced, thereby ensuring the accuracy of the analog signal and extending the repeated service life of the connector.

[0045] In summary, the shielded connector 100 of this application can reproduce the encoder reference signal to meet the operational requirements of rapid maintenance and limited function maintenance of servo equipment. It has high compatibility, can be quickly deployed, and requires no additional equipment.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A shielded connector for simulating the output signal of a magnetic encoder, characterized in that, The device includes a main body and an analog circuit. The main body has a plug-in terminal and a back end disposed opposite to the plug-in terminal. The plug-in terminal is provided with a plurality of plug-in points. The analog circuit is disposed on the back end. The analog circuit includes analog points that are connected one-to-one with the plug-in points. At least two of the analog points are short-circuited, and at least two of the analog points are connected through diodes.

2. The shielded connector according to claim 1, characterized in that, At least two of the simulated points are connected by resistors.

3. The shielded connector according to claim 1, characterized in that, The simulated points include a first return voltage point and a first supply voltage point, which are shorted together, and the voltage of the first return voltage point and the first supply voltage point is 2.5V.

4. The shielded connector according to claim 2, characterized in that, The simulated points include a second return voltage point and a second supply voltage point, which are connected by a diode. The voltage of the second return voltage point and the second supply voltage point is 0V.

5. The shielded connector according to claim 4, characterized in that, The simulated points include a third return voltage point and a third supply voltage point, which are connected by a diode. The voltage of the third return voltage point and the third supply voltage point is 5V.

6. The shielded connector according to claim 5, characterized in that, The simulated points include simulated temperature signal points, and the second return voltage point, the third return voltage point, and the simulated temperature signal points are interconnected by resistors.

7. The shielded connector according to claim 5, characterized in that, The diode is a unidirectional diode, and the reverse withstand voltage of the diode is greater than 24V.

8. The shielded connector according to claim 7, characterized in that, The diode is configured such that when it is turned on, the electrical signal flows from the second supply voltage point to the second return voltage point, and when it is turned on, the electrical signal flows from the third supply voltage point to the third return voltage point.

9. The shielded connector according to claim 2, characterized in that, The resistor is a temperature-sensitive resistor with a positive temperature coefficient, and the resistance value is greater than or equal to 47kΩ.

10. The shielded connector according to claim 1, characterized in that, It also includes a protective cover, which is disposed on the back end and is used to protect the analog circuit.

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