A sealing structure for a junction box and a motor

Abstract

This utility model provides a cable outlet box sealing structure and a motor. The cable outlet box sealing structure includes a cable outlet box body, a locking member, and a sealing member. The cable outlet box body has a mounting hole. The locking member has a head end and a tail end. The head end extends into the mounting hole and connects the cable outlet box body to the motor housing. The tail end is located in the mounting hole, and the sealing member is embedded in the mounting hole, sealing the tail end within the mounting hole. This utility model's sealing member fills the gap between the mounting hole and the locking member, ensuring that gas cannot leak from these parts, thereby maintaining the airtightness of the motor's interior.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to a terminal box sealing structure and a motor. Background Technology

[0002] In recent years, with the continuous development of industries such as industrial robots and non-standard automated equipment, the servo motor market has maintained a sustained growth trend, and its application areas have become increasingly widespread. The special operating environment of servo motors requires high protection performance from the motor body itself, which necessitates high protection performance from the sealing structure and corresponding sealing elements between various parts of the motor body. Currently, the servo motor power supply outlet box is secured to the housing with screws. A sealing gasket is placed between the outlet box and the screws during screw tightening. The screw area on the outlet box is sealed with adhesive, applying adhesive to the screws and the holes until the adhesive is flush with the surface of the outlet box. However, this sealing method allows air to easily enter the adhesive, forming air bubbles. During airtightness testing of the entire machine, gas entering the motor from the airtightness testing instrument can easily leak out through these bubbles, causing overall air leakage. Using this installation method, the screw area on the outlet box often fails to meet the airtightness requirements during overall machine airtightness testing. Utility Model Content

[0003] This utility model provides a sealing structure for a junction box and a motor, which can solve the technical problem that when applying glue, air can easily enter the glue and form bubbles. Gas entering the motor from the airtightness testing instrument can easily leak out from the bubbles, causing the whole machine to leak.

[0004] This utility model provides a cable outlet box sealing structure, which includes a cable outlet box body, a locking component and a sealing component;

[0005] The cable outlet box body is provided with a mounting hole. The locking member has a head end and a tail end. The head end extends into the mounting hole and connects the cable outlet box body to the housing. The tail end is located in the mounting hole, and the sealing member is embedded in the mounting hole, sealing the tail end in the mounting hole.

[0006] In some embodiments, the mounting hole is a stepped hole, and the seal has a stepped structure that abuts against the stepped surface of the stepped hole.

[0007] In some embodiments, the seal includes a first sealing body and a second sealing body connected to each other. With the longitudinal section of the seal as the projection plane, the horizontal length of the first sealing body is greater than the horizontal length of the second sealing body, so that the connection between the first sealing body and the second sealing body forms the stepped structure.

[0008] In some embodiments, the seal further includes a lug, one end of which is connected to the outer edge of the first sealing body, and the other end of which extends away from the first sealing body; a mounting groove is also provided on the end face of the outlet box body, the mounting groove is connected to the mounting hole, and the lug is embedded in the mounting groove.

[0009] In some embodiments, a sealing ring is also included, wherein an annular groove is provided on the side of the stepped structure facing the stepped hole, the sealing ring is installed in the annular groove, and the sealing ring abuts against the stepped surface of the stepped hole.

[0010] In some embodiments, a pressure sensor is also included, which is installed inside the junction box body and is electrically connected to an external detection device. The pressure sensor is used to detect the air pressure inside the junction box body.

[0011] In some embodiments, a magnet is provided inside the outlet box body, which is used to attract and hold the pressure sensor.

[0012] An electric motor includes a terminal box sealing structure, wherein the terminal box sealing structure is the aforementioned terminal box sealing structure.

[0013] In some embodiments, the motor includes a shaft and a housing, the shaft passing through the housing, and the shaft being a detachably connected assembly shaft.

[0014] In some embodiments, the rotating shaft includes a first shaft and a second shaft, a first end of the first shaft is fitted with a rotor core, a second end of the first shaft extends out of the rotor core, one end of the second shaft is detachably connected to the second end of the first shaft, and the other end of the second shaft extends out of the housing.

[0015] The present invention provides a sealing structure for a cable outlet box and a motor, which have the following beneficial effects:

[0016] The main function of this sealing component is to prevent gas leakage from the connection point (mounting hole) between the terminal box and the housing. In the special operating environment of servo motors, such as high humidity, high pressure, or vacuum environments, airtightness is one of the key factors for the normal operation of the motor. The sealing component fills the gap between the mounting hole and the locking component, ensuring that gas cannot leak from these parts, thereby maintaining the airtightness of the motor's interior. Good airtightness can prevent external gases (such as humid air, corrosive gases, etc.) from entering the motor, avoiding corrosion or damage to the electrical components and mechanical parts inside the motor, thus extending the motor's service life and improving its operational reliability. In dusty industrial environments, dust and fine particles may enter the motor through unsealed parts, leading to wear, short circuits, or poor heat dissipation of internal motor components. The sealing component, by tightly fitting the inner wall of the mounting hole, prevents dust and impurities from entering the motor, thereby maintaining the cleanliness and good operating condition of the motor's interior. The use of the sealing component can significantly improve the motor's protection level, enabling it to adapt to a wider range of industrial applications and meet the protection requirements under different environmental conditions. During actual installation, due to factors such as machining accuracy, assembly errors, or component deformation, there may be slight gaps or incomplete fits between the mounting holes and the locking components. The sealing components can fill these slight gaps through their own elasticity or plasticity, compensating for installation errors and ensuring a sealing effect. Even if slight unevenness or alignment errors occur during installation, the sealing components can still effectively perform their sealing function, reducing the excessive requirements for installation accuracy and improving the fault tolerance and convenience of installation. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the sealing structure of the outlet box according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the mounting holes and mounting grooves in an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the locking component according to an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the lug in an embodiment of the present utility model;

[0022] Figure 5This is a schematic diagram of the sealing ring according to an embodiment of the present utility model;

[0023] Figure 6 This is a schematic diagram of the motor according to an embodiment of the present utility model;

[0024] Figure 7 This is a schematic diagram of a pressure sensor according to an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the first shaft of an embodiment of the present utility model;

[0026] Figure 9 This is a schematic diagram of the second shaft in an embodiment of the present utility model;

[0027] Figure 10 This is a circuit diagram of the testing equipment.

[0028] Attached Figures: 1-Cable outlet box body; 101-Mounting hole; 102-Mounting groove; 2-Locking component; 21-Head end; 22-Tail end; 3-Sealing component; 301-First sealing body; 302-Second sealing body; 303-Lug; 304-Annular groove; 4-Sealing ring; 5-Pressure sensor; 601-Rotating shaft; 611-First shaft body; 612-Second shaft body; 602-Housing; 603-Rotor core. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0030] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0031] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used here to describe the spatial positional relationship of a device or feature as shown in the figure with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device as described in the figure. For example, if a device in the figure is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures.

[0032] See also Figures 1 to 3 As shown, according to an embodiment of the present invention, a cable outlet box sealing structure is provided, which includes a cable outlet box body 1, a locking member 2, and a sealing member 3; the cable outlet box body 1 is provided with a mounting hole 101, the locking member 2 has a head end 21 and a tail end 22, the head end 21 extends into the mounting hole 101, and the head end 21 connects the cable outlet box body 1 to the housing 602; the tail end 22 is located in the mounting hole 101, and the sealing member 3 is embedded in the mounting hole 101, and the sealing member 3 seals the tail end 22 in the mounting hole 101.

[0033] Specifically, place the cable outlet box body 1 in the designated position on the housing 602, ensuring that the mounting hole 101 on the cable outlet box is aligned with the corresponding hole on the housing 602. That is, the mounting surface of the cable outlet box should be tightly fitted to the mounting surface of the housing 602. Align the head end 21 of the locking member 2 with the mounting hole 101 on the cable outlet box body 1 and screw the head end 21 in. During screwing, ensure that the bolt is perpendicular to the mounting hole 101 to prevent the bolt from tilting or getting stuck. When the head end 21 contacts the housing 602, continue tightening the bolt to ensure a tight connection between the cable outlet box and the housing 602. After tightening the locking member 2, check whether the cable outlet box body 1 is securely connected to the housing 602. Simultaneously, check whether the tail end 22 is fully embedded in the mounting hole 101, ensuring that the tail end 22 is flush with the surface of the cable outlet box. Align the seal 3 with the mounting hole 101 and insert it into the mounting hole 101. During insertion, ensure that the seal 3 is evenly embedded in the mounting hole 101, avoiding twisting, wrinkling, or incomplete embedding. After installation, check that the seal 3 is fully embedded in the mounting hole 101. The surface of the seal 3 should be flush with or slightly lower than the surface of the junction box body 1, ensuring a tight fit between the seal 3 and the inner wall of the mounting hole 101 without gaps. After installation, use an airtightness testing device to perform an airtightness test on the entire motor.

[0034] In this embodiment, the main function of the seal 3 is to prevent gas leakage from the connection point (mounting hole 101) between the terminal box and the housing 602. In the special operating environment of the servo motor, such as high humidity, high pressure, or vacuum environments, airtightness is one of the key factors for the normal operation of the motor. The seal 3 ensures that gas cannot leak from these parts by filling the gap between the mounting hole 101 and the locking member 2, thereby maintaining the airtightness of the motor. Good airtightness can prevent external gases (such as humid air, corrosive gases, etc.) from entering the motor, avoiding corrosion or damage to the electrical components and mechanical parts inside the motor, thereby extending the service life of the motor and improving its operational reliability. In dusty industrial environments, dust and fine particles may enter the motor through unsealed parts, leading to wear, short circuits, or poor heat dissipation of internal motor components. The seal 3 prevents dust and impurities from entering the motor by tightly fitting the inner wall of the mounting hole 101, thereby keeping the motor clean and in good operating condition. The use of the seal 3 can significantly improve the protection level of the motor, enabling it to adapt to a wider range of industrial application scenarios and meet the protection requirements under different environmental conditions. During actual installation, due to factors such as machining accuracy, assembly errors, or component deformation, there may be a small gap or incomplete fit between the mounting hole 101 and the locking element 2. The sealing element 3 can fill these small gaps through its own elasticity or plasticity, compensate for installation errors, and ensure the sealing effect. Even if there are slight unevenness or alignment errors during installation, the sealing element 3 can still effectively perform its sealing function, reducing the excessive requirements for installation accuracy and improving the fault tolerance and convenience of installation.

[0035] In this embodiment, by setting a seal 3 between the tail end 22 of the locking member 2 and the mounting hole 101, the sealing defects that may exist in traditional installation methods (such as sealing with screws and gaskets alone) are effectively filled. The seal 3 can tightly fit the inner wall of the mounting hole 101 and the tail end 22 of the locking member 2, ensuring that gas cannot leak from these parts, thereby significantly improving the airtightness of the connection between the cable box and the housing 602. In special operating environments, such as high humidity, high pressure, or vacuum environments, this sealing structure can ensure that the motor interior maintains good airtightness and prevent external gas from entering the motor interior, thereby meeting the high protection requirements of servo motors. The installation process of this embodiment is simple. The seal is completed by simply tightening the locking member 2 and inserting the seal 3. No additional glue or complicated gasket installation steps are required, saving installation time and labor costs. The installation status of the seal 3 can be confirmed by simple visual inspection. If the seal 3 is found to be damaged or improperly installed, it can be quickly repaired or replaced, improving maintenance efficiency.

[0036] See also Figures 1 to 3As shown, the mounting hole 101 is a stepped hole, also known as a countersunk hole. The mounting hole 101 has a large diameter on the end face of the outlet box body 1. The sealing element 3 has a stepped structure, and the stepped structure abuts against the stepped surface of the stepped hole.

[0037] Specifically, align the head end 21 of the locking member 2 with the stepped hole on the cable outlet box body 1, and screw the head end 21 in. Install the cable outlet box body 1 on the housing 602. Align the sealing member 3 with the stepped hole on the cable outlet box body 1, ensuring that the stepped structure of the sealing member 3 is aligned with the stepped surface of the stepped hole and that the stepped structure of the sealing member 3 is tightly fitted with the stepped surface of the stepped hole. After the sealing member 3 is installed, check whether the sealing member 3 is completely embedded in the stepped hole. The surface of the sealing member 3 should be flush with or slightly lower than the surface of the cable outlet box body 1, ensuring that the sealing member 3 is tightly fitted with the stepped surface of the stepped hole without any gaps.

[0038] In this embodiment, the stepped structure of the seal 3 is designed to fit tightly with the stepped surface of the stepped hole. This design allows the seal 3 to be accurately positioned in the correct position of the stepped hole during installation, preventing the seal 3 from shifting or misaligning during installation. The stepped surface of the stepped hole provides a clear installation reference surface for the seal 3. When the stepped structure of the seal 3 fits tightly with the stepped surface of the stepped hole, the seal 3 is firmly fixed in the stepped hole, ensuring that it will not shift due to vibration or other external forces during subsequent use. The stepped structure of the seal 3 can form a tight contact surface with the stepped surface of the stepped hole. This tight fit of the contact surface can effectively prevent gas, liquid and dust from entering the motor through the gap between the seal 3 and the mounting hole 101. The stepped surface of the stepped hole provides a flat contact surface, which allows the stepped structure of the seal 3 to be evenly stressed, thereby ensuring that the seal 3 can achieve a good sealing effect on the entire contact surface. The tight fit between the stepped structure and the stepped surface of the stepped hole forms a continuous sealing surface, which effectively reduces the gap between the seal 3 and the mounting hole 101, thereby significantly improving the sealing performance. This setting can effectively prevent gas leakage, liquid intrusion and dust entry, meeting the operating environment of the servo motor under high protection requirements.

[0039] See also Figures 1 to 3 As shown, the sealing element 3 includes a first sealing body 301 and a second sealing body 302 that are connected to each other. With the longitudinal section of the sealing element 3 as the projection plane, the horizontal length of the first sealing body 301 is greater than the horizontal length of the second sealing body 302, so that a stepped structure is formed at the connection between the first sealing body 301 and the second sealing body 302.

[0040] Specifically, the first sealing body 301 of the sealing element 3 is aligned with the larger diameter portion of the stepped hole on the cable outlet box body 1 to ensure that the stepped structure of the sealing element 3 is aligned with the stepped surface of the stepped hole. Since the horizontal length of the first sealing body 301 is greater than that of the second sealing body 302, the stepped structure will naturally fit tightly with the stepped surface of the stepped hole.

[0041] In this embodiment, because the horizontal length of the first sealing body 301 is greater than that of the second sealing body 302, the stepped structure can fit tightly against the stepped surface of the stepped hole. This tight fit can effectively prevent gas, liquid, and dust from entering the motor through the gap between the seal 3 and the mounting hole 101, thereby significantly improving the sealing performance. The structural arrangement of the first sealing body 301 and the second sealing body 302 provides a dual sealing effect. The first sealing body 301 fits tightly against the larger diameter portion of the stepped hole to form the first seal; the second sealing body 302 further enhances the sealing effect, ensuring that the overall sealing performance of the seal 3 is more reliable. The larger size and stepped structure of the first sealing body 301 provide a clear positioning reference for the seal 3. During installation, the stepped structure of the seal 3 can naturally align with the stepped surface of the stepped hole, ensuring that the seal 3 is installed in the correct position and avoiding offset or misalignment. After the stepped structure fits tightly against the stepped surface of the stepped hole, the seal 3 is firmly fixed in the stepped hole. This fixing method can effectively prevent the seal 3 from shifting due to vibration or other external forces during subsequent use, thereby ensuring the long-term stability of the sealing effect.

[0042] See also Figures 1 to 4 As shown, the sealing element 3 also includes a lug 303. One end of the lug 303 is connected to the outer edge of the first sealing body 301, and the other end of the lug 303 extends away from the first sealing body 301. A mounting groove 102 is also provided on the end face of the outlet box body 1. The mounting groove 102 communicates with the mounting hole 101, and the lug 303 is embedded in the mounting groove 102.

[0043] Specifically, align the first sealing body 301 of the seal 3 with the larger diameter portion of the stepped hole on the junction box body 1, ensuring that the stepped structure of the seal 3 is aligned with the stepped surface of the stepped hole. Since the horizontal length of the first sealing body 301 is greater than that of the second sealing body 302, the stepped structure will naturally fit tightly against the stepped surface of the stepped hole. Ensure that the lug 303 of the seal 3 is aligned with the mounting groove 102 on the end face of the junction box body 1, place the seal 3 into the stepped hole, and simultaneously embed the lug 303 into the mounting groove 102, ensuring that the lug 303 is fully embedded in the mounting groove 102 and fits tightly against the inner wall of the mounting groove 102.

[0044] In this embodiment, the lug 303, after being embedded in the mounting groove 102, further enhances the sealing effect. The lug 303 fits tightly against the inner wall of the mounting groove 102, forming a second seal to further prevent leakage of gas, liquid, and dust. Through the dual sealing mechanism of the stepped structure and the lug 303, the seal 3 can provide a sealing effect from two directions (radial and axial), ensuring more reliable sealing performance. The lug 303, after being embedded in the mounting groove 102, can further fix the position of the seal 3, preventing it from shifting due to vibration or other external forces during use. This dual positioning and fixing mechanism ensures the stability of the seal 3 during long-term use. The stepped structure and the lug 303 improve the tolerance for installation errors, reduce excessively high requirements for machining and assembly precision, make the installation process easier to operate, and reduce sealing problems caused by installation errors.

[0045] See also Figures 1 to 5 As shown, it also includes a sealing ring 4. An annular groove 304 is provided on the side of the stepped structure facing the stepped hole. The sealing ring 4 is installed in the annular groove 304 and abuts against the stepped surface of the stepped hole.

[0046] Specifically, the sealing element 3 includes a first sealing body 301 and a second sealing body 302. The first sealing body 301 has an annular groove 304 on the side facing the stepped hole. The first sealing body 301 of the sealing element 3 is aligned with the larger diameter portion of the stepped hole on the cable outlet box body 1, ensuring that the stepped structure of the sealing element 3 is aligned with the stepped surface of the stepped hole. Since the horizontal length of the first sealing body 301 is greater than that of the second sealing body 302, the stepped structure will naturally fit tightly against the stepped surface of the stepped hole. A sealing ring 4 is placed in the annular groove 304 on the side of the first sealing body 301 facing the stepped hole, ensuring that the sealing ring 4 is fully embedded in the annular groove 304 and fits tightly against the inner wall of the annular groove 304. The sealing element 3 is then placed into the stepped hole. During this process, the sealing ring 4 will undergo a certain deformation, while ensuring that the sealing ring 4 fits tightly against the stepped surface of the stepped hole. Ensure that the lug 303 of the seal 3 is aligned with the mounting groove 102 on the end face of the outlet box body 1, and insert the lug 303 into the mounting groove 102, ensuring that the lug 303 is fully inserted into the mounting groove 102 and fits tightly against the inner wall of the mounting groove 102.

[0047] In this embodiment, the sealing ring 4 is embedded in the annular groove 304 of the first sealing body 301 and fits tightly against the stepped surface of the stepped hole, forming another layer of seal. This double sealing mechanism significantly improves the sealing performance and ensures a more reliable sealing effect. Through the double seal of the stepped structure and the sealing ring 4, a better sealing effect is provided, ensuring more comprehensive sealing performance. The sealing ring 4 typically has a certain degree of elasticity, which can automatically adapt to minor unevenness or installation errors of the stepped surface of the stepped hole. Even if the machining accuracy or assembly accuracy is not perfect, the elastic deformation of the sealing ring 4 can compensate for these errors, ensuring that the sealing ring 4 fits tightly against the stepped surface of the stepped hole. This setting improves the fault tolerance of installation, reduces the excessive requirements for machining and assembly accuracy, makes the installation process easier to operate, and reduces sealing problems caused by installation errors.

[0048] As a specific implementation, the main function of the seal 3 is to provide a reliable seal, so it needs to have good elasticity, chemical corrosion resistance and durability, and can be made of rubber. Similarly, the main function of the lug 303 is to provide additional fixing and sealing effects, so it needs to have good mechanical strength, durability and a certain degree of elasticity, and can be made of rubber. Preferably, the lug 303 is integrally formed with the first sealing body 301, and two lugs 303 are symmetrically arranged on both sides of the first sealing body 301.

[0049] See also Figures 1 to 7 As shown, it also includes a pressure sensor 5, which is installed inside the outlet box body 1. The pressure sensor 5 is electrically connected to an external detection device and is used to detect the air pressure inside the outlet box body 1.

[0050] Specifically, pressure sensor 5 is installed inside the junction box body 1. A location representing the internal air pressure of the junction box is selected, and the signal line of pressure sensor 5 is connected to an external detection device, ensuring a secure connection to avoid signal transmission interruption or interference. An initial measurement of the internal air pressure of the junction box is performed using the external detection device, and the initial pressure value is recorded as a reference for subsequent testing. The junction box is then evacuated or filled with gas at a certain pressure (such as compressed air), and the gas source is turned off. The external detection device is used to monitor the air pressure changes inside the junction box in real time. If the air pressure remains stable, the sealing performance is good; if the air pressure drops, a leak may be present.

[0051] In this embodiment, pressure sensor 5 can monitor the air pressure changes inside the junction box in real time. After installation, the sealing performance can be immediately determined by initial pressure measurement and subsequent air pressure monitoring. If the air pressure remains stable, the sealing performance is good; if the air pressure drops, it indicates a possible leak. This design allows for timely detection of leaks in their early stages, preventing motor failures due to seal failure. Early detection of leaks reduces maintenance costs and downtime. Pressure sensor 5 provides high-precision air pressure measurement, capable of detecting minute air pressure changes, which is more accurate and reliable than traditional airtightness testing methods.

[0052] As one specific implementation method, see [link to relevant documentation] Figure 10 As shown, as more and more gas accumulates inside the motor, the internal air pressure increases, and the air pressure inside the terminal box also increases. The sensor can transmit this signal to an external detection device, and the R in the detection device circuit... x As the internal air pressure of the junction box increases, the resistance value increases, the voltage across its terminals increases, and the voltage across the diode also increases. When the critical value is reached, the diode conducts, and the voltage across inductor L1 also increases. This voltage is conducted to inductor L2 through mutual inductance, increasing the voltage across inductor L2, causing the diode to conduct, and the detection device displays a green light. Conversely, if the internal air pressure of the junction box cannot reach the required critical value, R... x The resistance value is not high, and the voltage across its terminals is also low. The voltage across the diode is below the conduction threshold, so it cannot conduct. There is no voltage across inductor L1, and no voltage across inductor L2, so the diode cannot conduct, and the testing equipment displays a red light. This method of overall machine airtightness testing solves the problem of verifying the airtightness of the junction box and simplifies the overall airtightness testing process for the motor.

[0053] See also Figures 1 to 7 As shown, a magnet is installed inside the outlet box body 1, which is used to attract and hold the pressure sensor 5.

[0054] In this embodiment, the magnet can attract and hold the pressure sensor 5, keeping it firmly in place inside the junction box. This fixing method effectively prevents the pressure sensor 5 from shifting or loosening due to vibration or other external forces during motor operation, thus ensuring that the sensor can stably measure air pressure. A stable installation position ensures that the measurement results of the pressure sensor 5 are more accurate and reliable. If the sensor shifts during operation, it may lead to inaccurate measurement data, thereby affecting the judgment of sealing performance. In addition, the attraction of the magnet makes the installation process of the pressure sensor 5 simpler and faster. Installers only need to bring the sensor close to the magnet to achieve quick positioning and fixation, without the need for additional fixing devices (such as glue). When maintenance, calibration, or replacement of the pressure sensor 5 is required, the attraction of the magnet also makes the disassembly process more convenient.

[0055] See also Figures 1 to 7 As shown, an electric motor includes a terminal box sealing structure, which is the terminal box sealing structure described above.

[0056] See also Figures 1 to 9 As shown, the motor includes a rotating shaft 601 and a housing 602. The rotating shaft 601 is inserted into the housing 602 and is a detachably connected assembly shaft.

[0057] In this embodiment, if a portion of the shaft 601 is damaged or worn, the detachable design allows for quick replacement of the damaged component without replacing the entire shaft 601. This significantly reduces maintenance time and costs. The detachable design allows maintenance personnel to easily disassemble the shaft 601 to repair or replace the damaged portion without requiring complex machining of the entire shaft 601 or upgrading or improving the motor's shaft 601. The detachable design makes the upgrade process more flexible, allowing for improvements or replacements of certain parts of the shaft 601 without replacing the entire motor. In some cases, the motor may need to be used in different application scenarios, which may have different requirements for the performance or size of the shaft 601. The detachable design allows for the replacement or adjustment of certain parts of the shaft 601 according to specific needs, enabling the motor to better adapt to various application scenarios.

[0058] See also Figures 1 to 9 As shown, the rotating shaft 601 includes a first shaft body 611 and a second shaft body 612. The first end of the first shaft body 611 is fitted with a rotor core 603, and the second end of the first shaft body 611 extends out of the rotor core 603. One end of the second shaft body 612 is detachably connected to the second end of the first shaft body 611, and the other end of the second shaft body 612 extends out of the housing 602.

[0059] In this embodiment, if a part of the first shaft 611 or the second shaft 612 is damaged or worn, the detachable connection allows for quick replacement of the damaged part without replacing the entire shaft 601. This significantly reduces maintenance time and costs. The first shaft 611 and the second shaft 612 can be manufactured separately and then assembled in the final assembly stage. This modular production method simplifies the production process, improves production efficiency, and reduces production costs.

[0060] In one specific implementation, the end face of the first shaft 611 is provided with a protrusion and a threaded hole, the end face of the second shaft 612 is provided with a groove, and the second shaft 612 is provided with a through hole along the axial direction. After the protrusion and the groove are connected to each other, the bolt is inserted into the through hole and threadedly connected to the threaded hole, thereby connecting the two shafts to form a rotating shaft 601. This method can solve the customer needs of different shaft extensions for the same electromagnetic scheme. At this time, the same first shaft 611 and different second shafts 612 can be processed. Compared with processing the corresponding complete rotor shaft, the cost is lower and the delivery time is easier to meet the customer's needs.

[0061] In one specific implementation, a rotor core 603 is sleeved on the rotating shaft 601, and the rotor core 603 extends out from both ends of the first shaft 611. A second shaft 612 that can be detachably connected can be provided at both ends of the first shaft 611.

[0062] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0063] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An outlet box seal structure, characterized by, include: The cable outlet box body (1), locking element (2), and sealing element (3); The cable outlet box body (1) is provided with a mounting hole (101). The locking member (2) has a head end (21) and a tail end (22). The head end (21) extends into the mounting hole (101) and connects the cable outlet box body (1) to the housing (602). The tail end (22) is located in the mounting hole (101), and the sealing member (3) is embedded in the mounting hole (101). The sealing member (3) seals the tail end (22) in the mounting hole (101).

2. The seal for an outlet box according to claim 1, wherein, The mounting hole (101) is a stepped hole, and the sealing element (3) has a stepped structure, which abuts against the stepped surface of the stepped hole.

3. The seal for an outlet box according to claim 2, wherein, The sealing element (3) includes a first sealing body (301) and a second sealing body (302) connected to each other. With the longitudinal section of the sealing element (3) as the projection plane, the horizontal length of the first sealing body (301) is greater than the horizontal length of the second sealing body (302), so that the step structure is formed at the connection between the first sealing body (301) and the second sealing body (302).

4. The seal for an outlet box according to claim 3, wherein, The sealing element (3) further includes a lug (303), one end of which is connected to the outer edge of the first sealing body (301), and the other end of which extends away from the first sealing body (301); a mounting groove (102) is also provided on the end face of the cable outlet box body (1), the mounting groove (102) is connected to the mounting hole (101), and the lug (303) is embedded in the mounting groove (102).

5. The seal for an outlet box according to claim 2, wherein, It also includes a sealing ring (4), and an annular groove (304) is provided on the side of the stepped structure facing the stepped hole. The sealing ring (4) is installed in the annular groove (304) and abuts against the stepped surface of the stepped hole.

6. The seal for an outlet box according to claim 1, wherein, It also includes a pressure sensor (5), which is installed inside the outlet box body (1). The pressure sensor (5) is electrically connected to an external detection device and is used to detect the air pressure inside the outlet box body (1).

7. The seal for an outlet box according to claim 6, wherein, The inside of the outlet box body (1) is provided with a magnet, which is used to attract the pressure sensor (5).

8. An electrical machine comprising an outlet box seal structure, characterized by, The outlet box sealing structure is the outlet box sealing structure according to any one of claims 1 to 7.

9. The electric machine of claim 8, wherein, The motor includes a rotating shaft (601) and a housing (602). The rotating shaft (601) passes through the housing (602) and is a detachably connected assembly shaft.

10. The electric machine of claim 9, wherein, The rotating shaft (601) comprises a first shaft body (611) and a second shaft body (612), a rotor iron core (603) is sleeved on a first end of the first shaft body (611), a second end of the first shaft body (611) protrudes from the rotor iron core (603), one end of the second shaft body (612) is detachably connected with the second end of the first shaft body (611), and the other end of the second shaft body (612) protrudes from the shell (602).

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