Sealing structure and motor assembly with same

Abstract

The invention provides a sealing structure and a motor assembly with the same. The sealing structure is used for being arranged at a mounting hole of a foundation to be mounted and comprises a mounting shell detachably inserted in the mounting hole, and a mounting space is defined by the mounting shell; the first sealing piece is mounted on the inner wall of the mounting shell and located in the mounting space; and the second sealing piece is mounted on the outer wall of the mounting shell and located between the mounting shell and the mounting hole so as to seal a gap between the mounting shell and the mounting hole. Through the technical scheme provided by the invention, the technical problem that a sealing structure in the prior art is inconvenient to disassemble and assemble quickly can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing structures, and in particular to a sealing structure and a motor component having the same. Background Art

[0002] At present, servo motors are widely used in the field of industrial robots. Servo motors are the power source of robots, and robot joints are driven by servo motors through reducers 60. Because the reducer 60 is usually filled with lubricating oil, it is necessary to perform oil-proof sealing at the position where the servo motor and reducer 60 match to prevent lubricating oil from entering the servo motor and causing damage to the motor.

[0003] However, the existing sealing structure has a structure that uses more than two oil seals for protective sealing. The oil seal is generally made of rubber, which is a consumable part and needs to be replaced during the life cycle of the motor. However, in order to ensure the sealing effect, Figure 5 As shown, the oil seal (equivalent to the first seal 20) and the oil seal installation position are interference fit, and the removal of the oil seal requires a large pulling force, which makes the oil seal difficult to remove. In addition, in the double oil seal structure, the oil seal on the inner side of the motor is deeply sunken in the installation position, and it is easy to damage the output shaft 51 of the motor 50 or the inner wall of the oil seal installation position during disassembly and assembly, resulting in the scrapping of the entire motor 50. Summary of the invention

[0004] The main purpose of the present invention is to provide a sealing structure and a motor assembly having the same, so as to solve the technical problem that the sealing structure in the prior art is not convenient for quick disassembly and assembly.

[0005] In order to achieve the above object, according to one aspect of the present invention, a sealing structure is provided, which is used to be arranged at an installation hole of a foundation to be installed, and the sealing structure includes:

[0006] An installation shell is detachably inserted in the installation hole, and the installation shell encloses an installation space;

[0007] A first sealing member is mounted on the inner wall of the mounting housing and is located in the mounting space;

[0008] The second sealing member is installed on the outer wall of the mounting shell and is located between the mounting shell and the mounting hole to seal the gap between the mounting shell and the mounting hole.

[0009] Further, the mounting housing is clearance-matched with at least part of the inner wall of the mounting hole; and / or,

[0010] The second sealing member is an annular structure; and / or,

[0011] A sealing installation groove is arranged on the outer wall of the installation shell, and at least a part of the second sealing member is arranged in the sealing installation groove.

[0012] Furthermore, there are at least two first sealing members, and the at least two first sealing members are arranged at intervals along a direction from one end to the other end of the mounting hole.

[0013] Further, the mounting housing is provided with a sealing connection groove for mounting the first sealing member, there are at least two sealing connection grooves, the at least two sealing connection grooves are arranged in one-to-one correspondence with the at least two first sealing members, and each first sealing member is attached to the peripheral wall of the corresponding sealing connection groove; the inner side wall of one of the two adjacent sealing connection grooves is arranged to protrude from the inner side wall of the other of the two adjacent sealing connection grooves; and / or,

[0014] There are at least two second sealing members, and the at least two second sealing members are arranged in one-to-one correspondence with the at least two first sealing members, and each second sealing member is arranged opposite to the corresponding first sealing member.

[0015] Further, an oil drain chamber connected to the mounting hole is provided on the foundation to be mounted;

[0016] Wherein, an oil drain port is provided on the mounting housing, and the oil drain cavity is connected with the mounting space through the oil drain port; the oil drain port is located between two adjacent first sealing members; and / or,

[0017] The foundation to be installed is provided with an observation port connected to the oil drain chamber, and an observation window is provided at the observation port; and / or,

[0018] The first sealing member is a skeleton oil seal structure.

[0019] Further, the installation housing comprises a first housing portion and a second housing portion connected to each other, and the second housing portion is located on a side of the first housing portion away from the foundation to be installed;

[0020] The outer edge of the second shell part is arranged to protrude from the outer edge of the first shell part; the part of the second shell part protruding from the first shell part is provided with a fastening part for connecting with the foundation to be installed; and / or,

[0021] The first housing portion is clearance-matched with the mounting hole.

[0022] According to another aspect of the present invention, there is provided a motor assembly, comprising:

[0023] The sealing structure provided above;

[0024] The motor, the housing of the motor forms the foundation to be installed.

[0025] Furthermore, the housing has a mounting hole and a first cavity to be sealed which are interconnected; the motor includes a rotor assembly and an output shaft, the rotor assembly is mounted on the output shaft and is located in the first cavity to be sealed, at least a portion of the output shaft is passed through the mounting hole and extends out of the first cavity to be sealed; the first sealing member of the sealing structure is sleeved on the output shaft;

[0026] The motor assembly also includes a reducer, in which a second cavity to be sealed for accommodating lubricating medium is arranged; the end of the output shaft extending out of the first cavity to be sealed is located in the second cavity to be sealed.

[0027] Furthermore, one side of the housing has a connecting portion, the connecting portion has a mounting hole; the connecting portion includes:

[0028] A first connection portion and a second connection portion connected to each other, the first connection portion being disposed around at least a portion of a mounting shell of the sealing structure; the second connection portion being located on a side of at least a portion of the mounting shell close to another side of the housing and being located on a side of the first connection portion close to at least a portion of the mounting shell;

[0029] The second connection portion is arranged to protrude from the first connection portion to form a step surface at the connection between the first connection portion and the second connection portion, and the step surface is used to contact at least a part of the mounting shell.

[0030] Furthermore, the sealing structure is the sealing structure provided above; the casing has a first cavity to be sealed; the end of the first sealing member away from the first cavity to be sealed among the at least two first sealing members of the sealing structure is arranged flush with the side of the mounting shell of the sealing structure away from the first cavity to be sealed.

[0031] The technical solution of the present invention can enhance the maintainability of the sealing structure. The detachable design of the mounting shell makes it unnecessary to disassemble the entire device when maintaining or replacing the first seal and the second seal, thereby reducing the maintenance cost and time. When the seal needs to be replaced, it is only necessary to remove the mounting shell and then remove the replacement seal from the mounting shell. Since there is a gap between the mounting shell and the mounting hole, the force required to remove the mounting shell is small. Such operation is more convenient than the conventional sealing solution, avoiding damage to the mounting hole caused by removing the seal and avoiding the scrapping of the foundation to be installed. This design allows the seal to be inspected and replaced regularly or as needed during the operation of the equipment, which helps to extend the service life of the equipment and maintain its performance. Secondly, such a setting improves the sealing efficiency and reliability of the sealing structure. The first seal and the second seal respectively solve the sealing problems of the internal channel and the external mounting interface, forming a double-layer sealing barrier. The first seal is directly installed on the inner wall of the mounting shell, effectively sealing the installation space inside the mounting shell and preventing leakage of internal fluid or gas. The second sealing member is arranged between the outer wall of the mounting shell and the mounting hole, ensuring the airtightness between the mounting shell and the base to be mounted, preventing pollutants from the external environment from entering the interior, and also preventing the leakage of fluid or gas. Therefore, the technical solution of the present invention can solve the technical problem that the sealing structure in the prior art is not convenient for quick disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0033] Figure 1 It shows a schematic cross-sectional structure diagram of a sealing structure provided according to the first embodiment of the present invention;

[0034] Figure 2 A schematic structural diagram of an installation housing of a sealing structure provided in accordance with the first embodiment of the present invention is shown;

[0035] Figure 3 A schematic cross-sectional structure diagram of a mounting housing of a sealing structure provided according to Embodiment 1 of the present invention is shown;

[0036] Figure 4 It shows a front view of a mounting housing of a sealing structure provided according to the first embodiment of the present invention;

[0037] Figure 5 A schematic cross-sectional structure diagram of a motor assembly in the prior art is shown;

[0038] Figure 6 A schematic cross-sectional structure diagram of a motor assembly provided according to a second embodiment of the present invention is shown;

[0039] Figure 7 Shows Figure 6 A schematic diagram of the structure enlargement at the center A;

[0040] Figure 8 A schematic cross-sectional structure diagram of a connecting portion of a motor assembly provided according to a second embodiment of the present invention is shown.

[0041] The above drawings include the following reference numerals:

[0042] 10. Install the housing;

[0043] 101, sealing installation groove; 102, sealing connection groove; 103, oil drain port;

[0044] 11. first housing portion; 12. second housing portion; 13. fastening portion; 131. screw;

[0045] 20. a first sealing member;

[0046] 30. Connecting part;

[0047] 31. Mounting hole; 32. Oil drain chamber; 33. Observation window;

[0048] 301, first connection portion; 302, second connection portion; 303, step surface;

[0049] 40. Second sealing member;

[0050] 50. Motor;

[0051] 51. output shaft; 52. housing; 53. encoder; 54. rear bearing; 55. rotor core; 56. stator core; 57. front bearing;

[0052] 60. Reducer;

[0053] 61. housing; 62. output shaft of reducer;

[0054] 1. The first cavity to be sealed;

[0055] 2. The second cavity to be sealed. DETAILED DESCRIPTION

[0056] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0057] like Figures 1 to 4As shown, the first embodiment of the present invention provides a sealing structure, which is used to be arranged at the installation hole 31 of the foundation to be installed, and the sealing structure includes a mounting shell 10, a first sealing member 20 and a second sealing member 40. The mounting shell 10 is detachably inserted at the mounting hole 31, and the mounting shell 10 encloses an installation space. The first sealing member 20 is installed on the inner wall of the mounting shell 10 and is located in the installation space. The second sealing member 40 is installed on the outer wall of the mounting shell 10 and is located between the mounting shell 10 and the mounting hole 31 to seal the gap between the mounting shell 10 and the mounting hole 31.

[0058] The sealing structure provided by the first embodiment of the present invention can first enhance the maintainability of the sealing structure. The detachable design of the mounting housing 10 makes it unnecessary to disassemble the entire device when maintaining or replacing the first seal 20 and the second seal 40, thereby reducing the maintenance cost and time. When the seal needs to be replaced, it is only necessary to remove the mounting housing 10 and then remove the replacement seal from the mounting housing 10. Since there is a gap between the mounting housing 10 and the mounting hole 31, the force required to remove the mounting housing 10 is small. Such an operation is more convenient than a conventional sealing solution, avoiding damage to the mounting hole 31 caused by removing the seal, and avoiding the scrapping of the foundation to be installed. This design allows the seal to be inspected and replaced regularly or as needed during the operation of the equipment, which helps to extend the service life of the equipment and maintain its performance. Secondly, such a setting improves the sealing efficiency and reliability of the sealing structure. The first seal 20 and the second seal 40 respectively solve the sealing problems of the internal channel and the external mounting interface, forming a double-layer sealing barrier. The first seal 20 is directly mounted on the inner wall of the mounting housing 10, effectively sealing the installation space inside the mounting housing 10 and preventing leakage of internal fluid or gas. The second sealing member 40 is disposed between the outer wall of the mounting housing 10 and the mounting hole 31, ensuring the airtightness between the mounting housing 10 and the base to be mounted, preventing pollutants from the external environment from entering the interior, and preventing fluid or gas from leaking out. Therefore, the sealing structure provided in this embodiment can solve the technical problem that the sealing structure in the prior art is not convenient for quick disassembly and assembly.

[0059] Specifically, the mounting housing 10 is clearance-matched with at least part of the inner wall of the mounting hole 31. With such a structural setting, the friction of the mounting housing 10 in the mounting hole 31 is reduced through the clearance fit between the mounting housing 10 and the mounting hole 31, making the disassembly and assembly of the mounting housing 10 more convenient, reducing the complexity and difficulty of equipment maintenance, and also helping to reduce the risk of damage to the mounting housing 10 or the mounting hole 31 due to excessive friction during the disassembly and assembly process.

[0060] Specifically, the mounting housing 10 is an annular structure. With such a structural setting, the mounting housing 10 of the annular structure helps to evenly distribute the pressure, ensure the sealing effect of the entire mounting interface is consistent, and avoid the situation of poor local sealing. In addition, this structure can also simplify the manufacturing process of the mounting housing 10, improve its production efficiency and cost-effectiveness.

[0061] Specifically, the first seal 20 is interference fit with the mounting housing 10. One side of the second seal 40 is interference fit with the mounting housing 10, and the other side of the second seal 40 is interference fit with the mounting hole 31. With such a structural setting, the interference fit ensures that there is no gap between the first seal 20 and the mounting housing 10, and there is no gap between the second seal 40 and the mounting housing 10 and the mounting hole 31, thereby improving the sealing effect and effectively preventing the leakage of internal fluid and the intrusion of external contaminants. At the same time, the interference fit increases the stability of the seal, avoids vibration and displacement during the operation of the equipment, and further enhances the reliability of the seal.

[0062] Specifically, the second seal 40 is an annular structure. With such a structural setting, the second seal 40 of the annular structure can ensure the integrity and uniformity of the contact surface with the mounting housing 10 and the mounting hole 31. Compared with the seal of the non-annular structure, the setting of the annular seal is more stable when subjected to pressure and is not easy to deform, thereby improving the sealing performance and the operating stability of the equipment.

[0063] Specifically, a sealing installation groove 101 is provided at the outer wall of the installation housing 10, and at least a portion of the second sealing member 40 is disposed in the sealing installation groove 101. With such a structural arrangement, the sealing installation groove 101 is designed to accurately fix the position of the second sealing member 40 to prevent it from moving or twisting during the operation of the device, thereby ensuring that the second sealing member 40 can maintain a stable and effective sealing state when subjected to pressure, and also facilitating the installation process of the second sealing member 40 and improving the assembly efficiency of the device.

[0064] Specifically, the second sealing member 40 is an O-ring. In this way, the O-ring is used as the second sealing member 40, which has good elasticity, wear resistance and chemical corrosion resistance, and can adapt to a variety of working environments, including high temperature, high pressure or corrosive media. The O-ring can form a tight seal between the mounting housing 10 and the mounting hole 31, effectively preventing fluid leakage. At the same time, its simple shape and easy installation characteristics also facilitate the maintenance and replacement of the equipment, reducing maintenance costs and time. The cross-section of the O-ring is a perfect circle in the initial state, and the cross-section of the cavity where the O-ring is installed is generally a rectangle with long and short sides, and the short side is smaller than the diameter of the O-ring, so that the O-ring can be compressed and deformed (become similar to an ellipse) during installation, so that it is tightly attached to the short side to form a sealing effect.

[0065] Specifically, the inner wall of the mounting hole 31 is a smooth surface. In this way, the smooth treatment of the inner wall of the mounting hole 31 can reduce the friction resistance when installing or removing the mounting housing 10, making the assembly and disassembly process of the mounting housing 10 smoother. At the same time, the smooth inner wall also reduces the wear on the seal and prolongs the service life of the sealing structure. In addition, the smooth inner wall surface helps to improve the sealing effect of the second sealing member 40, because any surface unevenness may become a potential factor for sealing failure.

[0066] In this embodiment, there are at least two first seals 20, and at least two first seals 20 are arranged at intervals along the direction from one end to the other end of the mounting hole 31. With such a structural arrangement, multiple first seals 20 are used and arranged at intervals, which can provide multiple sealing guarantees. Even if one of the seals fails or its performance deteriorates, the other seals can continue to operate, thereby improving the reliability of the system. At the same time, this design also increases the adaptability of the sealing structure to pressure and temperature changes, because multiple seals can disperse and reduce the stress that may be generated on a single seal, thereby reducing the risk of damage to the seal due to excessive load.

[0067] Specifically, the mounting hole 31 is extended along a preset direction. At least two first seals 20 are spaced apart along the preset direction. In this way, the extension of the mounting hole 31 along the preset direction helps to ensure the correct alignment and insertion of the mounting housing 10, thereby improving the accuracy and efficiency of the installation. The preset direction may be determined according to the specific design and installation requirements of the device. For example, if the mounting hole 31 needs to be parallel to the output shaft 51 of the device, then the mounting hole 31 extending in the axial direction helps to improve the sealing performance of the first seal 20 because they can fit more closely to the movement path of the output shaft 51. In addition, the design of the preset direction also facilitates the inspection and replacement of the mounting hole 31 and the seal during subsequent maintenance, thereby ensuring the maintainability of the equipment.

[0068] Specifically, there are two first seals 20, and the two first seals 20 are respectively arranged at the two ends of the inner wall of the mounting shell 10. With such a structural arrangement, the first seals 20 are respectively arranged at the two ends of the inner wall of the mounting shell 10, which can ensure that both ends of the internal flow channel of the mounting shell 10 are sealed and protected. This double-end sealing design improves the overall protection capability of the sealing structure. Even if one of the seals is aged or worn, the other seal can continue to provide a sealing function, thereby enhancing the reliability of the system. At the same time, the seals at both ends also help to balance the pressure inside and outside the mounting shell 10, reducing the adverse effects of the pressure difference on the seal.

[0069] Specifically, the spacing between the two first seals 20 is greater than or equal to the width of the first seal 20 along the preset direction. In this way, it is possible to prevent the two first seals 20 from being too close to each other, so that the heat generated by the lips of the two first seals 20 during operation affects each other, causing the temperature to rise and accelerating the aging of the lips.

[0070] Specifically, the mounting housing 10 is provided with a sealing connection groove 102 for mounting the first seal 20, and there are at least two sealing connection grooves 102, and at least two sealing connection grooves 102 are arranged one-to-one with at least two first seals 20, and each first seal 20 is fitted on the peripheral wall of the corresponding sealing connection groove 102. The inner side wall of one of the two adjacent sealing connection grooves 102 protrudes from the inner side wall of the other of the two adjacent sealing connection grooves 102. With such a structural arrangement, the setting of the sealing connection groove 102 provides a precise installation position for the first seal 20, ensuring a stable connection between the seal and the mounting housing 10. At the same time, through the protruding design of the sealing connection groove 102, a pressure buffer zone can be formed between the first seals 20, which helps to disperse and reduce the direct impact on the seal caused by the change of fluid pressure, and improves the pressure resistance and stability of the sealing structure. This design also facilitates the replacement and maintenance of the seal, and reduces the risk of damage caused by the disassembly and assembly of the seal.

[0071] Specifically, there are two sealing connection grooves 102, and the two sealing connection grooves 102 are arranged at intervals on the inner side wall of the installation housing 10. With such a structural arrangement, the sealing connection grooves 102 arranged at intervals can further ensure the sealing effect of the internal channel of the installation housing 10, and avoid affecting the performance of the entire sealing structure due to the failure of a single sealing point. At the same time, this spacing layout method also helps to reduce the mutual influence between the sealing components, improves the independence and reliability of the sealing structure, and facilitates targeted inspection and replacement of a single sealing component.

[0072] Specifically, there are at least two second seals 40, and at least two second seals 40 are arranged in a one-to-one correspondence with at least two first seals 20, and each second seal 40 is arranged opposite to the corresponding first seal 20. With such a structural arrangement, by arranging at least two second seals 40 to correspond to the first seals 20, an internal and external double sealing barrier is formed, which significantly improves the overall protection and reliability of the sealing structure. Even if a small leak occurs in one of the first seals 20, the second seal 40 can prevent further penetration of the fluid, effectively preventing further leakage of the fluid or gas. This one-to-one double-layer sealing design not only enhances the reliability of the seal, but also facilitates the identification and replacement of specific seals during maintenance, thereby improving the maintainability and maintenance efficiency of the equipment.

[0073] Specifically, there are two second seals 40, and the two second seals 40 are respectively arranged at the two ends of the outer wall of the mounting shell 10. In this way, the second seals 40 are arranged at both ends of the outer wall of the mounting shell 10, which can ensure that the fluid or gas entering from both ends is effectively blocked, especially for the radial leakage path, this sealing layout can provide additional protection. The setting of the two second seals 40, on the one hand, balances the pressure distribution at both ends of the shell, reducing the possibility of sealing failure due to high pressure at one end; on the other hand, it simplifies the installation and replacement process of the seal, and maintenance personnel can replace damaged seals without completely disassembling the sealing structure from one side, saving maintenance time and cost. In addition, the sealing design at both ends also improves the stability of the overall sealing structure and reduces the impact of equipment vibration or environmental changes on the sealing effect.

[0074] Specifically, an oil drain chamber 32 connected to the mounting hole 31 is provided on the base to be installed. Among them, an oil drain port 103 is provided on the mounting shell 10, and the oil drain chamber 32 is connected to the mounting space through the oil drain port 103; the oil drain port 103 is located between two adjacent first seals 20. With such a structural setting, the design of the oil drain chamber 32 and the oil drain port 103 enables the cavity formed between the first seals 20 to be connected to the oil drain chamber 32. When fluid or gas leaks between the first seals 20, it can be guided to the oil drain chamber 32 through the oil drain port 103 to prevent further leakage of lubricating oil and reduce the sealing pressure of the other first seal 20. At the same time, the position design of the oil drain port 103 can ensure that even if one of the first seals 20 fails, the leaked fluid can be effectively guided, collected and observed, which is convenient for timely discovery and replacement of failed seals, thereby reducing the damage to the equipment caused by fluid or gas leakage and improving the service life of the equipment.

[0075] Specifically, there are multiple oil drain ports 103, and the multiple oil drain ports 103 are arranged at intervals on the mounting housing 10. With such a structural arrangement, the layout of the multiple oil drain ports 103 can more evenly distribute the oil drain pressure of the cavity between the first seals 20, ensuring that the leaked fluid or gas can be effectively discharged from different positions, avoiding the problem of blockage of the oil drain path. This design also enhances the reliability and stability of the entire sealing structure. Even if a certain oil drain port 103 fails or is blocked, the other oil drain ports 103 can continue to function, ensuring the normal operation and maintenance convenience of the system.

[0076] Specifically, an oil drain chamber 32 connected to the mounting hole 31 is provided on the foundation to be installed. An observation port connected to the oil drain chamber 32 is provided on the foundation to be installed, and an observation window 33 is provided at the observation port. With such a structural setting, the setting of the observation window 33 enables maintenance personnel to directly observe the situation inside the oil drain chamber 32, especially whether there is leakage in the cavity between the first seal 20. This non-invasive monitoring method improves the efficiency and accuracy of fault detection, and can perform timely maintenance at the early stage of slight leakage, avoiding equipment damage caused by failure to detect leakage in time, thereby significantly improving the maintainability and operation safety of the equipment.

[0077] Specifically, the observation window 33 is an arc-shaped part. The observation window 33 is made of a transparent material. In this way, the use of a transparent arc-shaped observation window 33 not only ensures the clarity of observation, but also improves the mechanical strength and durability of the observation window 33. The arc-shaped design can better adapt to the shape of the observation port, provide a wider observation angle, and enable maintenance personnel to observe leakage from multiple angles, thereby improving the scope and accuracy of leakage detection. At the same time, the transparent material ensures the penetration of light, and the state of the oil leakage chamber 32 can be clearly observed even under low light conditions, thereby enhancing the maintenance convenience and reliability of the system.

[0078] Specifically, the oil leakage chamber 32 is arranged around the mounting hole 31. There are at least two observation ports and observation windows 33, and the at least two observation ports and the at least two observation windows 33 are arranged one by one. One and the other of the at least two observation ports are arranged opposite to each other and are respectively located on one side and the other side of the mounting hole 31. With such a structural arrangement, the surrounding oil leakage chamber 32 can fully collect the fluid or gas leaked from between the two first seals 20, and the arrangement of multiple observation ports and observation windows 33 allows maintenance personnel to observe the state of the oil leakage chamber 32 from different angles and positions, thereby improving the comprehensiveness and timeliness of leakage detection. The observation ports arranged opposite to each other are helpful in comparing and analyzing the leakage conditions on both sides, facilitating the rapid location of problems, improving the accuracy and efficiency of maintenance work, and also strengthening the self-detection function of the system, ensuring that the equipment operates in the best condition and extending its service life.

[0079] Specifically, the first seal 20 is a skeleton oil seal structure. In this way, the skeleton oil seal structure has good sealing performance and durability, it can effectively prevent fluid leakage, and at the same time has certain vibration resistance and wear resistance, which improves the overall reliability of the sealing structure. The elastic lip of the skeleton oil seal can fit tightly with the output shaft 51, and can still maintain a good sealing effect even when the shaft rotates at high speed or the temperature changes, reducing the risk of leakage caused by aging or wear of the oil seal material, and further ensuring the safety and efficiency of the equipment operation.

[0080] In this embodiment, the installation housing 10 includes a first housing portion 11 and a second housing portion 12 connected to each other, and the second housing portion 12 is located on a side of the first housing portion 11 away from the foundation to be installed. Among them, the outer edge of the second housing portion 12 is arranged to protrude from the outer edge of the first housing portion 11; the part of the second housing portion 12 protruding from the first housing portion 11 is provided with a fastening portion 13 for connecting with the foundation to be installed. With such a structural arrangement, the second housing portion 12 has a larger contact area, thereby providing a more stable connection between the installation housing 10 and the foundation to be installed. The arrangement of the fastening portion 13 not only ensures the fixation of the installation housing 10, but also simplifies the installation process, making the installation and disassembly of the housing more convenient and improving the maintenance efficiency. At the same time, the protruding design of the second housing portion 12 can also absorb and buffer the impact force during the installation process, protect the cooperation between the first housing portion 11 and the oil seal, avoid damage to the foundation to be installed during the installation or disassembly process, and enhance the overall stability and reliability of the system.

[0081] Specifically, the first housing portion 11 and the second housing portion 12 are both annular structures. With such a structural arrangement, the annular first housing portion 11 and the second housing portion 12 can ensure uniform sealing of the oil seal at the mounting hole 31, avoid the uneven sealing problem caused by the irregular shape of the mounting housing 10, and improve the sealing effect. In addition, the annular structure also ensures the radial positioning of the oil seal at the mounting hole 31, avoids the deviation of the oil seal during operation, and enhances the stability and life of the oil seal.

[0082] Specifically, the fastening portion 13 is a hole for mounting a screw 131. The mounting housing 10 is connected to the mounting hole 31 by means of the screw 131. In this way, the mounting housing 10 can be firmly fixed to the mounting hole 31 by means of the fastening connection of the screw 131. This connection method not only provides sufficient fixing strength, but also allows accurate positioning of the mounting housing 10 and the oil seal assembly, thereby avoiding sealing failure caused by improper connection methods. The screw connection is also detachable, which facilitates quick disassembly and assembly during maintenance or troubleshooting, reduces maintenance costs, and improves system maintainability.

[0083] Specifically, there are multiple fastening parts 13, and the multiple fastening parts 13 are evenly spaced along the periphery of the second housing part 12. With such a structural arrangement, the multiple fastening parts 13 can ensure that the connection between the installation housing 10 and the base to be installed is more uniform and stable, avoiding excessive local stress caused by single-point fastening, thereby reducing deformation and potential sealing failure during the fastening process. The evenly spaced fastening parts 13 can also ensure that the installation housing 10 is evenly stressed during the entire installation process, improving the structural stability of the system and the reliability of the sealing performance.

[0084] In this embodiment, the mounting housing 10 includes a first housing portion 11 and a second housing portion 12 which are connected to each other, and the second housing portion 12 is located on a side of the first housing portion 11 away from the base to be installed. The first housing portion 11 is clearance-matched with the mounting hole 31. With such a structural setting, the clearance-matching design allows the mounting housing 10 to have a certain amount of movable space in the mounting hole 31. This design reduces the wear caused by the friction between the mounting hole 31 and the first housing portion 11, protects the first seal 20 from being affected by the external installation process, and prolongs the service life of the first seal 20. At the same time, the clearance-matching can also adapt to slight changes in the size of the mounting hole 31, improves the adaptability and flexibility of the installation, and reduces the installation difficulties caused by size mismatch.

[0085] like Figures 6 to 8 As shown, the second embodiment of the present invention provides a motor assembly, which includes the sealing structure provided in the first embodiment and a motor 50, wherein the housing 52 of the motor 50 forms a base to be installed.

[0086] The motor assembly provided by the second embodiment of the present invention can firstly enhance the maintainability of the sealing structure. The detachable design of the mounting housing 10 makes it unnecessary to disassemble the entire device when maintaining or replacing the first seal 20 and the second seal 40, thereby reducing maintenance costs and time. When it is necessary to replace the seal, it is only necessary to remove the mounting housing 10 and then remove the replacement seal from the mounting housing 10. Since there is a gap between the mounting housing 10 and the mounting hole 31, the force required to remove the mounting housing 10 is small. Such operation is more convenient than conventional sealing solutions, avoiding damage to the mounting hole 31 due to removal of the seal, and avoiding the scrapping of the housing 52 of the motor 50. This design allows the seal to be inspected and replaced regularly or as needed during the operation of the equipment, which helps to extend the service life of the equipment and maintain its performance. Secondly, such a setting improves the sealing efficiency and reliability of the sealing structure. The first seal 20 and the second seal 40 respectively solve the sealing problems of the internal channel and the external mounting interface, forming a double-layer sealing barrier. The first seal 20 is directly mounted on the inner wall of the mounting housing 10, effectively sealing the mounting space inside the mounting housing 10 and preventing leakage of internal fluid or gas. The second seal 40 is arranged between the outer wall of the mounting housing 10 and the mounting hole 31, ensuring the airtightness between the mounting housing 10 and the housing 52 of the motor 50, preventing pollutants from the external environment from entering the interior, and also avoiding leakage of fluid or gas. Therefore, the motor assembly provided in this embodiment can solve the technical problem that the sealing structure in the prior art is not convenient for quick disassembly and assembly.

[0087] Specifically, the housing 52 has a mounting hole 31 and a first cavity to be sealed 1 that are interconnected. The motor 50 includes a rotor assembly and an output shaft 51. The rotor assembly is mounted on the output shaft 51 and is located in the first cavity to be sealed 1. At least part of the output shaft 51 is inserted into the mounting hole 31 and extends out of the first cavity to be sealed 1. The first seal 20 of the sealing structure is sleeved on the output shaft 51. The motor assembly also includes a reducer 60, and a second cavity to be sealed 2 for accommodating a lubricating medium is provided in the reducer 60. The end of the portion of the output shaft 51 extending out of the first cavity to be sealed 1 is located in the second cavity to be sealed 2. Specifically, there is lubricating oil in the second cavity to be sealed 2. With such a structural arrangement, it is ensured that the output shaft 51 of the motor 50 is effectively connected to the second cavity to be sealed 2 in the reducer 60 when passing through the mounting hole 31 of the housing 52. At the same time, the gap between the output shaft 51 and the housing 52 is sealed by the first seal 20, and the path of the lubricating medium in the second cavity to be sealed 2 to leak to the first cavity to be sealed 1 is effectively isolated. This structural layout not only improves the effective utilization of the lubricating medium and avoids resource waste and environmental pollution caused by lubricating medium leakage, but also protects the inside of the motor 50 from lubricating medium contamination, extends the service life of the motor 50, and improves the operating safety and efficiency of the motor 50.

[0088] Specifically, a static seal is formed between the first seal 20 and the mounting housing 10 , and a dynamic seal is formed between the first seal 20 and the output shaft 51 .

[0089] Specifically, one side of the housing 52 has a connection portion 30, and the connection portion 30 has a mounting hole 31. The connection portion 30 includes a first connection portion 301 and a second connection portion 302 connected to each other, and the first connection portion 301 is arranged around at least a portion of the mounting housing 10 of the sealing structure. The second connection portion 302 is located on a side of at least a portion of the mounting housing 10 close to the other side of the housing 52 and on a side of the first connection portion 301 close to at least a portion of the mounting housing 10. Among them, the second connection portion 302 is arranged to protrude from the first connection portion 301, so as to form a step surface 303 at the connection between the first connection portion 301 and the second connection portion 302, and the step surface 303 is used to contact at least a portion of the mounting housing 10. With such a structural arrangement, by providing two connection portions of the connection portion 30, namely the first connection portion 301 and the second connection portion 302, and forming the step surface 303 at the connection between the two, this design ensures stable positioning and firm installation of the mounting housing 10 on the housing 52. The contact design between the step surface 303 and the mounting housing 10 not only provides additional mechanical support and reduces the shaking of the mounting housing 10, but also optimizes the contact area between the sealing structure and the housing 52, making the installation position of the seal more accurate and improving the sealing effect. In addition, the segmented arrangement of the first connecting portion 301 and the second connecting portion 302 helps to disperse the stress of the connecting portion 30, reducing the risk of sealing failure caused by local stress concentration, thereby improving the reliability and stability of the entire motor assembly.

[0090] Specifically, the housing 52 has a first cavity 1 to be sealed. The end of the first seal 20 away from the first cavity 1 to be sealed of the at least two first seals 20 of the sealing structure is flush with the side of the mounting shell 10 of the sealing structure away from the first cavity 1 to be sealed. With such a structural arrangement, the flush arrangement of the first seal 20 and the mounting shell 10 reduces the possibility of mechanical collision or scratching of the first seal 20 in the working environment, and improves the physical protection of the seal. This design also ensures a tight fit between the first seal 20 and the mounting shell 10, avoids additional leakage paths caused by the protrusion of the seal, and enhances the overall sealing performance of the sealing structure. At the same time, the flush arrangement also optimizes the outer contour of the motor assembly, making the connection between the motor 50 and the reducer 60 more compact, which is conducive to saving space and improving the integration of the equipment, thereby improving the installation and application flexibility of the motor assembly, reducing the volume and weight of the equipment, and having important technical advantages for the design and manufacture of the equipment.

[0091] It should be noted that the end of the first sealing member 20 is a portion of the first sealing member 20 close to the inner wall of the mounting housing 10 .

[0092] Specifically, the first seal 20 includes an oil seal body, a skeleton and a spring. The oil seal body is made of rubber material, specifically nitrile rubber (NBR), fluororubber (FKM), silicone rubber (VMQ), etc. These rubber materials have good oil resistance, heat resistance and chemical resistance. The skeleton is usually made of metal materials such as steel or copper, which provides support and fixing to ensure that the first seal 20 maintains a stable shape during installation and use. The spring is made of metal material, and the first seal 20 is provided with a spring inside its elastic lip to increase the tightness of the elastic lip to the output shaft 51 and improve the sealing effect. In this way, under normal working conditions, a layer of oil film will be formed between the output shaft 51 and the elastic lip. This layer of oil film not only reduces the friction between the lip and the output shaft 51, but also fills the small gap between the lip and the output shaft 51. The presence of the oil film increases the contact pressure between the lip and the output shaft 51, forming a liquid seal effect, which effectively prevents oil leakage.

[0093] Specifically, the motor 50 also includes a stator core 56, a rotor core 55, a front bearing 57, a rear bearing 54 and an encoder 53. The basic system principle of this motor 50 is that the rotor core 55 is fixedly connected to the output shaft 51 and supported on the front bearing 57 and the rear bearing 54. When electricity enters the stator core 56, the rotor core 55 will rotate, and the encoder 53 installed at the end of the output shaft 51 can accurately transmit the position and speed information of the servo motor rotor to the external controller, thereby achieving the function of accurately controlling the speed and position of the reducer output shaft 62. The output shaft 51 of the motor 50 extends into the interior of the housing 61 of the reducer 60 and is connected to the gear system of the reducer 60, and finally transmits power to each arm of the robot through the reducer output shaft 62.

[0094] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: reducing the difficulty of replacing the motor oil seal, avoiding damage to the motor during the oil seal replacement process, improving the maintainability of the motor, and extending the service life.

[0095] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0096] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0097] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0098] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0099] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0100] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing structure, characterized in that: The sealing structure is used to be arranged at a mounting hole (31) of a foundation to be installed, and the sealing structure comprises: An installation shell (10) is detachably inserted into the installation hole (31), and the installation shell (10) encloses an installation space; A first sealing member (20) is mounted on the inner wall of the mounting housing (10) and is located in the mounting space; A second sealing member (40) is mounted on the outer wall of the mounting shell (10) and is located between the mounting shell (10) and the mounting hole (31) to seal the gap between the mounting shell (10) and the mounting hole (31).

2. The sealing structure according to claim 1, characterized in that: The mounting housing (10) and the inner wall of the mounting hole (31) are at least partially clearance-matched; and / or, The second sealing member (40) is an annular structure; and / or, A sealing installation groove (101) is provided on the outer wall of the installation housing (10), and at least a portion of the second sealing member (40) is disposed in the sealing installation groove (101).

3. The sealing structure according to claim 1, characterized in that: There are at least two first sealing members (20), and the at least two first sealing members (20) are arranged at intervals along a direction from one end to the other end of the mounting hole (31).

4. The sealing structure according to claim 3, characterized in that: The mounting housing (10) is provided with a sealing connection groove (102) for mounting the first sealing member (20); there are at least two sealing connection grooves (102); at least two sealing connection grooves (102) are arranged in one-to-one correspondence with at least two first sealing members (20); each first sealing member (20) is fitted on the peripheral wall of the corresponding sealing connection groove (102); the inner side wall of one of the two adjacent sealing connection grooves (102) is arranged to protrude from the inner side wall of the other of the two adjacent sealing connection grooves (102); and / or, There are at least two second seals (40), and at least two second seals (40) are arranged in one-to-one correspondence with at least two first seals (20), and each second seal (40) is arranged opposite to the corresponding first seal (20).

5. The sealing structure according to claim 3, characterized in that: The base to be installed is provided with an oil drain chamber (32) which is in communication with the installation hole (31); The installation housing (10) is provided with an oil drain port (103), and the oil drain chamber (32) is connected to the installation space through the oil drain port (103); the oil drain port (103) is located between two adjacent first sealing members (20); and / or, The foundation to be installed is provided with an observation port communicating with the oil drain chamber (32), and the observation port is provided with an observation window (33); and / or, The first sealing member (20) is a skeleton oil seal structure.

6. The sealing structure according to claim 1, characterized in that: The installation shell (10) comprises a first shell portion (11) and a second shell portion (12) which are connected to each other, wherein the second shell portion (12) is located on a side of the first shell portion (11) away from the base to be installed; wherein the outer edge of the second shell portion (12) is arranged to protrude from the outer edge of the first shell portion (11); the portion of the second shell portion (12) protruding from the first shell portion (11) is provided with a fastening portion (13) for connecting to the foundation to be installed; and / or, The first housing portion (11) is clearance-matched with the mounting hole (31).

7. A motor assembly, characterized in that: include: The sealing structure according to any one of claims 1 to 6; A motor (50), wherein a housing (52) of the motor (50) forms a base to be installed.

8. The motor assembly according to claim 7, characterized in that The housing (52) has a mounting hole (31) and a first cavity (1) to be sealed that are interconnected; the motor (50) comprises a rotor assembly and an output shaft (51); the rotor assembly is mounted on the output shaft (51) and is located in the first cavity (1) to be sealed; at least a portion of the output shaft (51) is inserted into the mounting hole (31) and extends out of the first cavity (1) to be sealed; the first sealing member (20) of the sealing structure is sleeved on the output shaft (51); The motor assembly further comprises a reducer (60), wherein a second chamber to be sealed (2) for accommodating a lubricating medium is arranged in the reducer (60); the end of the output shaft (51) extending out of the first chamber to be sealed (1) is located in the second chamber to be sealed (2).

9. The motor assembly according to claim 7, characterized in that: One side of the housing (52) has a connecting portion (30), and the connecting portion (30) has a mounting hole (31); the connecting portion (30) comprises: a first connection portion (301) and a second connection portion (302) connected to each other, wherein the first connection portion (301) is arranged around at least a portion of a mounting shell (10) of the sealing structure; and the second connection portion (302) is located on a side of at least a portion of the mounting shell (10) close to the other side of the housing (52) and is located on a side of the first connection portion (301) close to at least a portion of the mounting shell (10); The second connection portion (302) is arranged to protrude from the first connection portion (301) to form a step surface (303) at the connection between the first connection portion (301) and the second connection portion (302), and the step surface (303) is used to contact at least part of the installation shell (10).

10. The motor assembly according to claim 7, characterized in that The sealing structure is the sealing structure of claim 3; the housing (52) has a first cavity (1) to be sealed; the end of the first sealing member (20) of the at least two first sealing members (20) of the sealing structure that is away from the first cavity (1) to be sealed is arranged flush with a side of the mounting shell (10) of the sealing structure that is away from the first cavity (1) to be sealed.

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