Discharging device of motor output shaft

Abstract

The utility model provides a discharging device for a motor output shaft, and the device mainly comprises a conductive coupling assembly which is electrically connected with the output shaft; the conveying unit is provided with an input end and an output end, the input end is used for receiving the current collected by the conductive coupling assembly, and the output end exports the current received by the conveying unit in a grounding mode; wherein the conductive coupling assembly is composed of a connecting handle and a chuck part, the connecting handle is electrically connected with the input end, and the chuck part can be connected with the output shaft in a clamping mode; by adopting the above structure, a conductive coupling structure formed by an existing discharging device and a motor output shaft in a lap joint mode can be avoided, the technical problem that the reliability risk exists in an electric coupling structure on the discharging device is solved, and the problems of increased contact resistance and poor contact caused by abrasion and aging of an electric brush or a carbon brush are avoided; the discharging efficiency and the reliability of shaft current management are improved, direct mechanical abrasion to the output shaft of the motor in the shaft current discharging process is effectively reduced, and the service life of the motor and related parts is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of shaft current discharge equipment, and in particular to a discharge device for a motor output shaft. Background Art

[0002] In the actual operation of motor equipment, due to factors such as manufacturing tolerances, assembly precision differences, and long-term operation wear, shaft currents are often generated on the motor output shaft. The generation of shaft currents is due to multiple factors such as the imbalance of the magnetic field inside the motor and the failure of bearing insulation. It will not only cause electrochemical corrosion to the motor bearings and accelerate bearing wear, but in severe cases may even cause bearing overheating and early damage, affecting the overall performance and service life of the motor. In addition, shaft currents may also induce generator vibration, increase noise, and even threaten the dynamic stability of the motor, which has a negative impact on the reliable operation of the entire motor equipment that cannot be ignored.

[0003] At present, in the face of the safety hazards brought by shaft current to motor equipment, the industry has developed corresponding countermeasures, among which the shaft current discharge device on equipment such as compressors is particularly prominent. Through targeted design, such devices can effectively conduct shaft current to the ground, thereby eliminating the impact of shaft current on motor bearings and significantly improving the operating safety and stability of motor equipment. Practice has proved that such discharge devices have achieved significant results in protecting motors from shaft current damage.

[0004] However, the existing shaft current discharge equipment has to face an important technical challenge in the design and implementation process - how to ensure effective discharge without affecting the normal operation of the motor output shaft. The current common practice is to use brushes or carbon brushes to achieve conductive coupling with the motor output shaft in an overlapping manner, so as to guide the shaft current to the ground terminal. Although this method can achieve the release of shaft current to a certain extent, this method of discharging shaft current by overlapping still has reliability risks caused by connection relationship and reaching a certain degree of wear. Utility Model Content

[0005] The purpose of the embodiment of the present application is to provide a discharge device for a motor output shaft, which avoids the existing discharge device forming a conductive coupling structure with the motor output shaft in an overlapping manner, and solves the problem of reliability risk of the electrical coupling structure on the discharge device.

[0006] In order to solve the above technical problems, the following technical solutions are provided in the embodiments of the present application:

[0007] The present application provides a discharge device for a motor output shaft, which mainly includes: a conductive coupling component, which is used to be electrically connected to the output shaft; a transmission unit, which has an input end and an output end, the input end is used to receive the current collected by the conductive coupling component, and the output end derives the current received by the transmission unit in a grounding manner;

[0008] The conductive coupling assembly is composed of a connecting handle and a clamping part, the connecting handle is electrically connected to the input end, and the clamping part can be connected to the output shaft in a clamping manner.

[0009] In some modified embodiments of the present application, the transport unit includes: a conductive element, which is made of a material with conductive function and is used to connect between the connecting handle and the site grounding point; a grounding accessory, which is arranged on the end of the conductive element away from the connecting handle to form an output end.

[0010] In some modified implementations of the present application, the transport unit further includes: a detection component, which is configured on the conductive element and is used to detect the current value on the conductive element.

[0011] In some modified implementations of the present application, the detection component is configured as a current sensor and is located between the input terminal and the grounding attachment.

[0012] In some modified implementations of the present application, the conductive element is configured as a transmission cable made of metal copper; and the grounding accessory is configured as a grounding clip or a grounding screw arranged on the transmission cable.

[0013] In some modified implementations of the present application, it also includes: a supporting component, which is set up next to the motor output shaft and is used to support the conductive coupling component close to the motor output shaft; the conductive coupling component is connected to the supporting component in a hinged manner.

[0014] In some modified embodiments of the present application, the conductive coupling assembly includes: two conductive brushes, each having a brush head and a brush handle, both brush handles are connected to the supporting component in a hinged manner to form a connecting handle, and the two brush heads are arranged alternately by hinged rotation to form a clamp; an elastic element is arranged between the two conductive brushes, and is used to drive the two conductive brushes to rotate based on the supporting component through elastic force, so as to form a clamping force between the two brush heads.

[0015] In some modified embodiments of the present application, the elastic element is configured as a tension spring connected between two conductive brushes; or, the elastic element is configured as a torsion spring sleeved on the connecting rod of the supporting component, and the two elastic rotating arms of the torsion spring are respectively fixedly connected to the corresponding brush handles.

[0016] In some modified implementations of the present application, a number of conductive bristles are respectively arranged on the two brush heads for contacting the motor output shaft.

[0017] In some modified embodiments of the present application, the supporting component includes: a base, whose bottom has a flat contact surface for contacting the venue table; a mounting column connected to the top of the base, and the mounting column is provided with a hinge for connecting the conductive coupling component.

[0018] Compared with the existing discharge device using the overlapping method, the discharge device of the motor output shaft provided by the present application adopts a clamping method that can provide a more stable contact interface, avoiding the problems of increased contact resistance and poor contact caused by wear and aging of brushes or carbon brushes, thereby ensuring that the shaft current is continuously and stably extracted, significantly improving the discharge efficiency and the reliability of shaft current management, and after switching to the clamping method, it can effectively reduce the direct mechanical wear on the motor output shaft during the shaft current discharge process, extend the service life of the motor and related components, and reduce the cost of maintenance and replacement; the present application realizes the effective management and discharge of the shaft current through innovative improvements to the motor output shaft current processing method, while improving the operating performance, safety and service life of the motor system, significantly improving the practical value of the discharge device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0020] Figure 1 The structural diagram of the discharge device of the motor output shaft in the present application is schematically shown.

[0021] Description of Figure Numbers:

[0022] 1. Supporting parts;

[0023] 11. Base; 12. Mounting column; 13. Hinge;

[0024] 2. Conductive coupling components;

[0025] 21. conductive brush; 22. elastic element; 210. conductive bristles;

[0026] 3. Conveying unit;

[0027] 31. Conductive element; 32. Grounding accessories; 33. Detection components;

[0028] 4. Site grounding point. DETAILED DESCRIPTION

[0029] The exemplary embodiments disclosed in the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments disclosed in the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0030] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which this application belongs.

[0031] Referring to the accompanying drawings, an embodiment of the present application provides a discharge device for a motor output shaft, which may include: a conductive coupling component 2, which is electrically connected to the output shaft; a transmission unit 3, which has an input end and an output end, the input end is used to receive the current collected by the conductive coupling component 2, and the output end derives the current received by the transmission unit 3 in a grounding manner;

[0032] The conductive coupling assembly 2 is composed of a connecting handle and a clamping part. The connecting handle is electrically connected to the input end, and the clamping part can be connected to the output shaft in a clamping manner.

[0033] Specifically, in the technical solution adopted by the present application, the discharge device of the motor output shaft has a conductive function, and can be composed of a conductive coupling component 2 that is easy to load and unload on the motor output shaft and a conveying unit 3 for conducting current. The conductive coupling component 2 can be detachably connected to the motor output shaft, and is used to introduce the current generated by the rotation of the motor output shaft into the conveying unit 3, and the conveying unit 3 has an input end connected to the conductive coupling component 2 and an output end connected to the site grounding point 4 or the grounding grid, so that it can serve as a current conducting medium between the conductive coupling component 2 and the site grounding point 4. The technical key point of the present application is that, considering that the normal operation of the motor output shaft is not affected, the connection structure between the conductive coupling component 2 and the motor output shaft is strengthened, and specifically, the conductive coupling component 2 has a connecting handle and a clamping part, the connecting handle is electrically connected to the input end, and the clamping part acts on the motor output shaft in a clamping or clamping manner, so that the connection structure between the conductive coupling component 2 and the motor output shaft is more reliable, and the conductive coupling component 2 can be applied to motors with output shafts facing in all directions after adopting a clamping method, thereby improving the practicality of the discharge device of the motor output shaft.

[0034] Further, see Figure 1 As shown, in some embodiments, the transport unit 3 includes: a conductive element 31, which is made of a material with conductive function and is used to connect between the connecting handle and the site grounding point 4; a grounding accessory 32, which is arranged on the end of the conductive element 31 away from the connecting handle to form an output end.

[0035] Specifically, in the technical solution adopted by the present application, in one embodiment, the conductive element 31 is made of an electrical conductor material. In this embodiment, a protective layer made of an electrical insulating material can be configured on the conductive element 31 to prevent the operator who touches the conductive element 31 from being injured by the electric current. The conductive element 31 is connected between the connecting handle and the site grounding point 4, and the end connected to the connecting handle is used as the above-mentioned input end. In order to facilitate loading and unloading with the site grounding point 4 or the grounding grid, a grounding attachment 32 is also configured at the end of the missile element away from the connecting handle. The grounding attachment 32 can be understood as an auxiliary part, so that the end with the grounding attachment 32 is used as the above-mentioned output end. The conductive element 31 is detachably connected to the site grounding point 4 through the grounding attachment 32, thereby forming a discharge circuit that can conduct the current on the motor output shaft to the ground through the conductive coupling component 2 and the conveying unit 3.

[0036] Further, see Figure 1 As shown, in some embodiments, the transport unit 3 further includes: a detection component 33 , which is disposed on the conductive element 31 and is used to detect the current value on the conductive element 31 .

[0037] Specifically, in the technical solution adopted by the present application, in one embodiment, the shaft current generated in the motor output shaft is effectively guided and injected into the conveying unit 3 with detection and transmission functions through the conductive coupling component 2 in the present application. When the current passes through the detection component 33 integrated on the conveying unit 3, the actual current value of the shaft current of the motor output shaft transferred to the conveying unit 3 can be directly read. If the test result shows that the current value is lower than the preset lower threshold value, it can be preliminarily inferred that there is a problem of insufficient contact efficiency between the conductive coupling component 2 and the motor output shaft. At this time, it is necessary to carefully inspect it and replace it as appropriate to restore good electrical contact conditions. If the current reading exceeds the set upper threshold, it is necessary to thoroughly investigate the root cause of the abnormal increase in current from multiple angles such as the electrical system design level and the motor operating status. If the current reading shows a zero value, there may be a situation where the conductive coupling component 2 fails or the entire electrostatic grounding circuit fails. For this, the fault point should be quickly identified and repaired. In situations where the motor's vibration values, audio characteristics or temperature show abnormal changes, comparing and analyzing the differences in shaft current between these abnormal moments and under normal operating conditions can help accurately identify potential risks that may affect the motor's stability and cause increased vibration, abnormal noise or excessive temperature rise.

[0038] Further, see Figure 1 As shown, in some embodiments, the detection component 33 is configured as a current sensor and is located between the input terminal and the grounding attachment 32 .

[0039] Specifically, in the technical solution adopted by the present application, in one embodiment, the present application adopts a conductive connection component connected to the motor output shaft to introduce the shaft current into the conveying unit 3. The conveying unit 3 is connected to the site grounding point 4, which can realize the effective release of the shaft current. Since this design does not require the configuration of additional resistors for voltage reduction processing, the current sensor can be selected as the ideal detection component 33 to monitor and accurately read the shaft current value introduced from the motor output shaft to the conveying unit 3 in real time.

[0040] In certain specific application scenarios, if a certain voltage remains or is generated on the conveying unit 3, in order to comprehensively evaluate the motor and the discharge device of the present application, a voltage sensor can be added while retaining the current sensor to monitor the voltage status of the conveying unit 3. The combined use of the current sensor and the voltage sensor can not only ensure the correct measurement and management of the shaft current, but also timely monitor the abnormal voltage that may occur, thereby providing more detailed data support for diagnosing and troubleshooting the motor and discharge device faults.

[0041] Further, see Figure 1 As shown, in some embodiments, the conductive element 31 is configured as a transmission cable made of metal copper; the grounding accessory 32 is configured as a grounding clamp or a grounding screw arranged on the transmission cable.

[0042] Specifically, in the technical solution adopted by the present application, in one embodiment, the conductive element 31 can use metal copper as the conductor on the conductive element 31, which can ensure the conductive efficiency of the discharge device. The specific conductive characteristics are second only to silver materials, which can effectively transmit electrical energy, reduce resistance loss, and reduce the heat loss of electrical energy during transmission. Compared with other common conductive materials such as aluminum, copper has a lower resistivity, which helps to reduce the heat generated by the wire when carrying current and improve energy efficiency. In addition, the copper material has good mechanical strength, is not easily deformed by stretching, compression or torsion, can withstand certain mechanical stress, and increases the durability and safety of the wire. It also has high ductility and can be easily made into filaments or thin sheets. At the same time, it has good flexibility, is easy to bend and install, and is not easy to break, which is crucial for wire laying and wiring work. It has good oxidation resistance and corrosion resistance. The patina formed in the natural environment has a certain conductivity, and is not as easy as aluminum to increase resistance due to oxidation, thereby ensuring the stability of the conductive performance after long-term use.

[0043] In this embodiment, when the discharge device of the motor output shaft is temporarily connected to a grounding point / grounding network of the site or the motor is temporarily tested, the grounding accessory 32 can be a dedicated grounding clamp. When the motor needs to be discharged for a long time, the grounding accessory 32 can be a grounding screw, so that the conductive element 31 can be permanently and stably fixed to the site grounding point or site grounding network.

[0044] Further, see Figure 1 As shown, in some embodiments, it also includes: a supporting component 1, which is set up next to the motor output shaft and is used to support the conductive coupling component 2 close to the motor output shaft; the conductive coupling component 2 is connected to the supporting component 1 in a hinged manner.

[0045] Specifically, in the technical solution adopted by the present application, the support component 1 is used to support the conductive coupling component 2 to a height that matches the motor output shaft, so as to facilitate connection with the motor output shaft, and can share the clamping force of the conductive coupling component 2 connecting the motor output shaft, so that the conductive coupling component 2 only needs to provide the clamping force connected to the motor output shaft, and does not need to bear its own weight through the clamping force connected to the motor output shaft, effectively avoiding the excessive clamping force of the conductive coupling component 2 affecting the normal operation of the motor output shaft, and the adaptive clamping force can reduce the degree of wear of the motor output shaft on the conductive coupling component 2, and improve the service life of the conductive coupling component 2. In one embodiment, the conductive coupling component 2 is connected to the support component 1 in an articulated manner, so that the conductive coupling component 2 can adapt to the motor output shaft in different positions or directions through the flip adjustment based on the support component 1, so as to improve the practicality of the discharge device of the motor output shaft.

[0046] Further, see Figure 1 As shown, in some embodiments, the conductive coupling component 2 includes: two conductive brushes 21, each having a brush head and a brush handle, the two brush handles are connected to the supporting component 1 in a hinged manner to form a connecting handle, and the two brush heads are arranged alternately by hinged rotation to form a clamp; an elastic element 22, which is configured between the two conductive brushes 21, and is used to drive the two conductive brushes 21 to rotate based on the supporting component 1 through elastic force, so as to form a clamping force between the two brush heads.

[0047] Specifically, in the technical solution adopted by the present application, in one embodiment, the conductive coupling component 2 is composed of two conductive brushes 21. Specifically, the above-mentioned connecting handle is composed of the brush handles of the two conductive brushes 21 hinged on the supporting component 1, so that the two conductive brushes 21 can be flipped and adjusted on the supporting component 1. The above-mentioned clamping head is composed of the brush heads of the two conductive brushes 21 arranged alternately. In this embodiment, in order to provide a clamping force between the two brush heads, an elastic element 22 is also provided between the two conductive brushes 21, so that when the two brush heads are rotated away from each other, the elastic element 22 can drive the two conductive brushes 21 to make their brush heads close to each other through its own elastic force, thereby generating a clamping force coupled to the output shaft of the motor. In this embodiment, since the conductive coupling component 2 contains two conductive brushes 21, two dual input ends adapted to the conductive coupling component 2 can be provided on the conductive element 31 for connecting with the brush handles of the corresponding conductive brushes.

[0048] Further, see Figure 1 As shown, in some embodiments, the elastic element 22 is configured as a tension spring connected between two conductive brushes 21; or, the elastic element 22 is configured as a torsion spring sleeved on the connecting rod of the supporting component 1, and the two elastic rotating arms of the torsion spring are respectively fixedly connected to the corresponding brush handles.

[0049] Specifically, in the technical solution adopted by the present application, in one embodiment, the elastic element can use a tension spring to realize the clamping force between the two brush heads. Specifically, the two ends of the tension spring can be set between the two conductive brushes 21. When the two conductive brushes 21 are flipped and adjusted on the supporting component 1, the brush heads move away from each other, which can drive the tension spring to perform elastic stretching, thereby generating a force between the two conductive brushes 21 through the reset elastic force of the tension spring that can clamp the output shaft of the motor.

[0050] In another embodiment, the elastic element can also be a torsion spring configured on the supporting component 1. The torsion spring can be configured in the hinge structure between the conductive brush 21 and the supporting component 1, or a connecting rod capable of configuring the torsion spring can be provided on the supporting component 1. Specifically, the two elastic rotating arms on the torsion spring can be fixedly connected to the brush handles of the two conductive brushes 21 respectively. In this embodiment, the elastic rotating arms can be inserted into the corresponding brush handles. When the two conductive brushes 21 are flipped and adjusted and the brush heads are moved away from each other, a force capable of clamping the motor output shaft is generated between the two conductive brushes 21 under the action of the torsion spring.

[0051] Further, see Figure 1 As shown, in some embodiments, a plurality of conductive bristles 210 are respectively arranged on the two brush heads for contacting the output shaft of the motor.

[0052] Specifically, in the technical solution adopted in the present application, arranging conductive bristles 210 on the brush head can reduce the contact area between the conductive brush 21 and the motor output shaft, so as to reduce the friction between the conductive brush 21 and the motor output shaft, thereby further reducing the negative effect of the discharge device on the normal movement of the motor output shaft.

[0053] Further, see Figure 1 As shown, in some embodiments, the supporting component 1 includes: a base 11, whose bottom has a flat contact surface for contacting the site table; a mounting column 12, which is connected to the top of the base 11, and the mounting column 12 is provided with a hinge 13 for connecting the conductive coupling component 2.

[0054] Specifically, in the technical solution adopted by the present application, in one embodiment, the support component 1 can adopt a dedicated support frame, specifically including a base 11, the bottom of the base 11 has at least one contact surface with a certain degree of flatness, which is used to contact the ground of the layout site, so that the support component 1 can stand independently in the site. The conductive coupling component 2 is connected to the base 11 through the mounting column 12, and the connection structure between the conductive coupling component 2 and the mounting column 12 can be hinged. In this embodiment, a hinge 13 for connecting the conductive coupling component 2 can be configured on the mounting column 12. The number of mounting columns 12 can also be expanded to two, and the above-mentioned connecting rod is set between the two mounting columns 12, and the conductive coupling component 2 is connected to the connecting rod in an articulated manner. Other methods can also be used, and only the conductive coupling component 2 needs to be connected to the corresponding support component 1 in an articulated manner, which are all within the scope of protection of the present application. In the present application, the motor output shaft with different extension directions can be adapted by adjusting the flip angle of the conductive coupling component 2 and setting the rotation direction of the articulated structure. For example: vertical motors and horizontal motors, etc.

[0055] In some embodiments, the base 11 can be made of insulating material to prevent the shaft current collected by the motor output shaft through the conductive coupling component 2 from being directly introduced into the ground by the support component 1. In one embodiment of the present application, if the conductive element 31 is electrically connected to the corresponding conductive brushes 21 respectively by the dual input end method in the above embodiment, the base on the support component 1 can be set as an electrical insulator, and the hinge 13 can be directly set as an electrical insulator to be able to insulate the conductive brush 21 from the column 12, or the column can be set as an electrical insulator. In another embodiment, if the conductive element 31 adopts one input end, the input end can be connected to the two conductive brushes 21 through the hinge 13. In this embodiment, the hinge 13 can be used as an electrical conductor, which is made of conductive material, and the base 11 and / or the column 12 are set as electrical insulators, so as to achieve that the input end of the auxiliary conductive element 31 is simultaneously connected to the two conductive brushes 21, and the shaft current is effectively prevented from being directly derived from the support component 1 as a grounding point. It should be noted that the present application may also lay an insulating layer between the base 11 and the ground to effectively prevent the support component 1 from being grounded, or other methods may be used to prevent the support component 1 from being electrically connected to the ground, all of which are within the scope of protection of the present application.

[0056] It should be noted that in the description of this specification, the terms "upper", "lower", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application; the terms "connect", "install", "fixed", etc. should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A discharge device for a motor output shaft, characterized in that: include: A conductive coupling assembly, used for electrically connecting to the output shaft; A transmission unit having an input end and an output end, wherein the input end is used to receive the current collected by the conductive coupling component, and the output end is used to derive the current received by the transmission unit in a grounded manner; The conductive coupling assembly is composed of a connecting handle and a clamping part, the connecting handle is electrically connected to the input end, and the clamping part can be connected to the output shaft in a clamping manner.

2. The discharge device for the motor output shaft according to claim 1, characterized in that: The conveying unit comprises: A conductive element, which is made of a material having a conductive function and is used to connect between the connecting handle and a grounding point of the site; A grounding accessory is arranged on an end of the conductive element away from the connecting handle to form the output end.

3. The discharge device for the motor output shaft according to claim 2, characterized in that: The conveying unit further comprises: The detection component is arranged on the conductive element and is used for detecting the current value on the conductive element.

4. The discharge device for the motor output shaft according to claim 3, characterized in that: The detection component is configured as a current sensor and is located between the input terminal and the grounding attachment.

5. The discharge device for the motor output shaft according to claim 2, characterized in that: The conductive element is a transmission cable made of metal copper; The grounding accessory is configured as a grounding clamp or a grounding screw arranged on the transmission cable.

6. The discharge device for the motor output shaft according to claim 1, characterized in that: Also includes: A supporting component, which is set beside the motor output shaft and is used to support the conductive coupling component close to the motor output shaft; The conductive coupling assembly is connected to the supporting component in an articulated manner.

7. The discharge device for the motor output shaft according to claim 6, characterized in that: The conductive coupling component comprises: Two conductive brushes, each having a brush head and a brush handle, wherein the two brush handles are connected to the support component in an articulated manner to form the connecting handle, and the two brush heads are arranged alternately through articulated rotation to form the clamp; The elastic element is arranged between the two conductive brushes and is used for driving the two conductive brushes to rotate based on the supporting component through elastic force, so as to form a clamping force between the two brush heads.

8. The discharge device for the motor output shaft according to claim 7, characterized in that: The elastic element is configured as a tension spring connected between the two conductive brushes; or, The elastic element is configured as a torsion spring sleeved on the connecting rod of the supporting component, and two elastic rotating arms of the torsion spring are respectively fixedly connected to the corresponding brush handles.

9. The discharge device for the motor output shaft according to claim 7, characterized in that: A plurality of conductive bristles are respectively arranged on the two brush heads for contacting the output shaft of the motor.

10. The discharge device for the motor output shaft according to claim 6, characterized in that: The supporting member comprises: A base, the bottom of which has a flat contact surface for contacting the venue table; The mounting column is connected to the top of the base, and a hinge part for connecting the conductive coupling component is arranged on the mounting column.

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