Motor bearing protection structure and motor

Abstract

The invention discloses a motor bearing protection structure and a motor, and relates to the technical field of motors, the motor bearing protection structure is integrated on the motor, the motor bearing protection structure comprises a bearing outer ring gland and a bearing inner ring baffle ring which are located at the axial end of a motor bearing, the bearing outer ring gland is arranged on an end cover, and the bearing inner ring baffle ring is arranged on the end cover. The bearing inner ring baffle ring is arranged on a rotating shaft, the bearing outer ring gland is provided with a locking conductive ring, the two axial ends of the locking conductive ring make contact with the bearing outer ring gland and the bearing inner ring baffle ring respectively to achieve electric conduction, and the radial position of the locking conductive ring is variable. And when the locking conductive ring is matched with the bearing inner ring baffle ring in the radial direction, the bearing inner ring baffle ring is locked. According to the motor bearing protection structure, the locking conductive ring is integrated on the motor, so that the radial locking of the baffle ring of the inner ring of the bearing in the transportation state and the axial electric conduction in the transportation state and the operation state are realized.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a motor bearing protection structure and a motor. Background Art

[0002] During the transportation and storage of the motor, the bearing clearance may cause vibration and impact, which may cause bearing damage and affect its normal operation. In addition, the bearing may also be affected by electrical corrosion during the operation of the motor, further shortening its service life.

[0003] Conventional bearing protection devices usually adopt complex designs and require additional installation steps and space, which not only increases the complexity of the operation, but also is difficult to implement within the limited structural space. In addition, the problem of electrical corrosion is also an important factor in bearing failure. The protection devices in the prior art do not have the function of solving the problem of electrical corrosion of bearings, so an additional motor grounding device is required, which is independent in structure and complex to install. Summary of the invention

[0004] The purpose of the present application is to provide a motor bearing protection structure, which realizes radial locking of the inner ring retaining ring of the bearing in the transport state and axial electrical conduction in the transport state and the operating state by integrating the locking conductive ring into the motor. Another purpose of the present application is to provide a motor.

[0005] To achieve the above-mentioned purpose, the present application provides a motor bearing protection structure integrated in the motor, wherein the motor bearing protection structure includes a bearing outer ring pressure cover and a bearing inner ring retaining ring located at one axial end of the motor bearing, the bearing outer ring pressure cover is arranged on the end cover, and the bearing inner ring retaining ring is arranged on the rotating shaft, the bearing outer ring pressure cover is provided with a locking conductive ring, and the axial ends of the locking conductive ring are respectively in contact with the bearing outer ring pressure cover and the bearing inner ring retaining ring to achieve electrical conduction, the radial position of the locking conductive ring is variable, and the bearing inner ring retaining ring is locked when the locking conductive ring is radially matched with the bearing inner ring retaining ring.

[0006] In some embodiments, the locking conductive ring includes a ring body and a conductive structure arranged on the ring body, the ring body is arranged on the bearing outer ring pressure cover, the ring body is used to radially lock the bearing inner ring retaining ring, and the conductive structure is used to contact and conduct with the bearing outer ring pressure cover and the bearing inner ring retaining ring at both ends.

[0007] In some embodiments, the ring body is provided with a mounting hole; the conductive structure is a double-headed carbon fiber brush in which carbon fiber is fixed by a ferrule, and the double-headed carbon fiber brush is arranged in the mounting hole.

[0008] In some embodiments, there are multiple conductive structures, and the multiple conductive structures are distributed along the circumference of the ring body.

[0009] In some embodiments, the ring body is an open elastic ring with an upper portion separated to form an opening, the lower area of ​​the open elastic ring symmetrical to the opening is a reinforcement portion, and the mounting hole is provided in the area of ​​the open elastic ring other than the reinforcement portion.

[0010] In some embodiments, a first annular surface is provided at one axial end of the bearing outer ring pressure cover facing the locking conductive ring, and the first annular surface is in contact and conduction with one side of the carbon fiber brush on the locking conductive ring. A second annular surface is provided at one axial end of the bearing inner ring retaining ring facing the locking conductive ring, and the second annular surface is in contact and conduction with the other side of the carbon fiber brush on the locking conductive ring.

[0011] In some embodiments, the bearing inner ring retaining ring is provided with an annular groove on the radial side facing the locking conductive ring, and the annular groove is used to radially cooperate with the bearing inner ring retaining ring after the locking conductive ring moves radially; and / or,

[0012] The bearing outer ring gland is provided with an annular groove on the radial side facing the locking conductive ring, and the locking conductive ring is provided in the annular groove; and / or,

[0013] An anti-rotation positioning groove is provided on the radial side of the bearing outer ring pressure cover facing the locking conductive ring; the locking conductive ring is provided with an anti-rotation boss, the anti-rotation boss is arranged in the anti-rotation positioning groove, and the anti-rotation boss is provided with a process through hole.

[0014] In some embodiments, a force transmission boss is provided on the radial side of the locking conductive ring facing the bearing outer ring cover; the bearing outer ring cover is provided with an adjusting member, and the adjusting member is used to move radially and drive the locking conductive ring to radially contract through the force transmission boss; the locking conductive ring is elastic, and the locking conductive ring is separated from the bearing inner ring retaining ring in the absence of external force.

[0015] In some embodiments, the number of the force transmission bosses is three, and the three force transmission bosses are distributed along the circumference of the locking conductive ring; the bearing outer ring cover is provided with three mounting structures distributed along the circumference; the number of the adjusting members is three, and the adjusting members are provided on the mounting structure and move through threads.

[0016] The present application also provides a motor, including an end cover, a bearing, a rotating shaft and the above-mentioned motor bearing protection structure. In the radial direction, the bearing and the motor bearing protection structure are arranged between the end cover and the rotating shaft, and in the axial direction, the motor bearing protection structure is arranged at one end of the bearing.

[0017] Compared with the above-mentioned background technology, the motor bearing protection structure provided in the present application is integrated in the motor, and the motor bearing protection structure mainly includes a bearing outer ring pressure cover and a bearing inner ring retaining ring located at one axial end of the motor bearing, the bearing outer ring pressure cover is arranged on the end cover, the bearing inner ring retaining ring is arranged on the rotating shaft, the bearing outer ring pressure cover is provided with a locking conductive ring, the axial ends of the locking conductive ring are respectively in contact with the bearing outer ring pressure cover and the bearing inner ring retaining ring to achieve electrical conduction, the radial position of the locking conductive ring is variable, and the bearing inner ring retaining ring is locked when the locking conductive ring and the bearing inner ring retaining ring are radially matched.

[0018] In traditional motor design, the protection and maintenance of bearings have always been challenging, especially during transportation and storage. The existence of bearing clearance makes the bearings easily damaged under the influence of vibration and impact, which not only affects the normal operation of the motor, but also may shorten its service life. In addition, the bearings may also suffer from electrical corrosion during the operation of the motor, which further increases the risk of bearing wear and failure. Traditional bearing protection devices are usually complex in design and require additional installation steps and space, which not only increases the complexity of the operation, but also is difficult to implement within the limited structural space. More importantly, these devices usually cannot solve the problem of electrical corrosion and require additional motor grounding devices, which increases the complexity of the structure and the difficulty of installation.

[0019] The motor bearing protection structure provided in this application effectively solves the above problems through an innovative design method. The structure integrates the locking conductive ring into the motor, realizes radial locking of the inner ring retaining ring of the bearing in the transport state, and axial electrical conduction in the transport state and the operating state.

[0020] This design integrates a locking conductive ring on the bearing outer ring gland, which can radially lock the bearing inner ring retaining ring during transportation, effectively limiting the axial and radial displacement of the bearing. This is equivalent to temporarily replacing the bearing support function with the locking conductive ring during transportation, making the bearing force zero, reducing vibration and impact damage to the bearing, and thus protecting the bearing. This locking mechanism is achieved through the radial position change of the locking conductive ring. When the locking conductive ring and the bearing inner ring retaining ring are radially matched, a stable locking force can be provided.

[0021] At the same time, the design of the locking conductive ring not only provides a locking function, but also realizes axial electrical conduction. The axial ends of the locking conductive ring are in contact with the bearing outer ring gland and the bearing inner ring retaining ring respectively. This contact conduction mechanism ensures that the shaft current of the motor can be effectively conducted during transportation and operation, thereby avoiding electrical corrosion problems.

[0022] In particular, this integrated design simplifies the assembly and maintenance process of the motor. Since the locking conductive ring is part of the motor, no additional installation steps and space are required, which reduces the complexity and cost of the operation. Since the radial position of the locking conductive ring is variable, the axial position of the locking conductive ring is determined by the structure on the bearing outer ring gland, such as the annular groove, by switching the locking conductive ring from the radial mating state to the separation state. The locking conductive ring can also serve as a bracket for the carbon fiber brush. This design also allows the motor to maintain the normal function of the bearing during normal operation without affecting the performance of the motor.

[0023] Combined with the above structure and process description, it can be seen that the motor bearing protection structure has at least the following beneficial effects: the motor bearing protection structure integrates the locking conductive ring into the motor, thereby realizing radial locking of the bearing inner ring retaining ring in the transportation state, and axial electrical conductivity in the transportation state and the operating state. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0025] FIG1 is a schematic diagram of a motor bearing protection structure provided in an embodiment of the present application;

[0026] FIG2 is a schematic diagram of AA in FIG1 ;

[0027] FIG3 is a CC schematic diagram of FIG2 ;

[0028] FIG4 is a schematic diagram of a locking conductive ring provided in an embodiment of the present application;

[0029] FIG5 is a schematic diagram of a conductive structure provided in an embodiment of the present application;

[0030] FIG6 is a BB schematic diagram of FIG5 ;

[0031] FIG7 is a dimensional diagram of a locking conductive ring provided in an embodiment of the present application;

[0032] FIG8 is a schematic diagram of a ring body provided in an embodiment of the present application;

[0033] FIG9 is a partial view of M in FIG1 ;

[0034] FIG10 is a schematic diagram of a bearing outer ring gland provided in an embodiment of the present application;

[0035] FIG11 is a cross-sectional view of a bearing outer ring gland provided in an embodiment of the present application;

[0036] FIG. 12 is a cross-sectional view of a bearing inner ring retaining ring provided in an embodiment of the present application.

[0037] in:

[0038] End cover 1, bearing outer ring pressure cover 2, first annular surface 21, annular groove 22, anti-rotation positioning groove 23, mounting structure 24, bearing inner ring retaining ring 3, second annular surface 31, annular groove 32, rotating shaft 4, locking conductive ring 5, ring body 51, mounting hole 511, conductive structure 52, carbon fiber 521, hoop 522, anti-rotation boss 53, process through hole 531, force transmission boss 54, adjusting part 6, bearing 7. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] Please refer to Figures 1 to 3, wherein Figure 1 is a schematic diagram of a motor bearing protection structure provided in an embodiment of the present application, Figure 2 is a schematic diagram of AA in Figure 1, and Figure 3 is a schematic diagram of CC in Figure 2.

[0042] In a first specific embodiment, the motor bearing protection structure provided in the implementation scheme of the present application is integrated into the motor, and the motor bearing protection structure mainly includes a bearing outer ring cover 2 and a bearing inner ring retaining ring 3 located at one axial end of the motor bearing, the bearing outer ring cover 2 is arranged on the end cover 1, and the bearing inner ring retaining ring 3 is arranged on the rotating shaft 4, the bearing outer ring cover 2 is provided with a locking conductive ring 5, and the axial ends of the locking conductive ring 5 are respectively in contact with the bearing outer ring cover 2 and the bearing inner ring retaining ring 3 to achieve electrical conduction, and the radial position of the locking conductive ring 5 is variable, and when the locking conductive ring 5 and the bearing inner ring retaining ring 3 are radially matched, the bearing inner ring retaining ring 3 is locked.

[0043] In traditional motor design, the protection and maintenance of bearings have always been challenging, especially during transportation and storage. The existence of bearing clearance makes the bearings easily damaged under the influence of vibration and impact, which not only affects the normal operation of the motor, but also may shorten its service life. In addition, the bearings may also suffer from electrical corrosion during the operation of the motor, which further increases the risk of bearing wear and failure. Traditional bearing protection devices are usually complex in design and require additional installation steps and space, which not only increases the complexity of the operation, but also is difficult to implement within the limited structural space. More importantly, these devices usually cannot solve the problem of electrical corrosion and require additional motor grounding devices, which increases the complexity of the structure and the difficulty of installation.

[0044] The motor bearing protection structure provided in this application effectively solves the above problems through an innovative design method. The structure integrates the locking conductive ring 5 into the motor, realizes radial locking of the bearing inner ring retaining ring 3 in the transport state, and axial electrical conduction in the transport state and the operating state.

[0045] This design integrates a locking conductive ring 5 on the bearing outer ring gland 2, which can radially lock the bearing inner ring retaining ring 3 during transportation, effectively limiting the axial and radial displacement of the bearing. This is equivalent to temporarily replacing the bearing support function with the locking conductive ring 5 during transportation, making the bearing force zero, reducing the damage to the bearing caused by vibration and impact, and thus protecting the bearing. This locking mechanism is achieved by changing the radial position of the locking conductive ring 5. When the locking conductive ring 5 and the bearing inner ring retaining ring 3 are radially matched, a stable locking force can be provided.

[0046] At the same time, the design of the locking conductive ring 5 not only provides a locking function, but also realizes axial electrical conduction. The axial ends of the locking conductive ring 5 are in contact with the bearing outer ring gland 2 and the bearing inner ring retaining ring 3 respectively. This contact conduction mechanism ensures that the shaft current of the motor can be effectively conducted during transportation and operation, thereby avoiding the problem of electrical corrosion.

[0047] In particular, this integrated design simplifies the assembly and maintenance process of the motor. Since the locking conductive ring 5 is part of the motor, no additional installation steps and space are required, which reduces the complexity and cost of the operation. Since the radial position of the locking conductive ring 5 is variable, by switching the locking conductive ring 5 from the radially engaged state to the separated state, this design also allows the motor to maintain the normal function of the bearing during normal operation without affecting the performance of the motor.

[0048] Combined with the above structure and process description, it can be seen that the motor bearing protection structure has at least the following beneficial effects: the motor bearing protection structure integrates the locking conductive ring 5 into the motor, thereby realizing radial locking of the bearing inner ring retaining ring 3 in the transportation state, and axial electrical conductivity in the transportation state and the operating state.

[0049] Taking the traction motor as an example, since the motor bearing protection structure is part of the structure of the traction motor product, it not only saves separate transportation protection tooling, but also eliminates the management problem of recycling and reuse, which has a great cost advantage.

[0050] Please refer to FIG. 4 , which is a schematic diagram of a locking conductive ring provided in an embodiment of the present application.

[0051] In some embodiments, the locking conductive ring 5 includes a ring body 51 and a conductive structure 52 arranged on the ring body 51. The ring body 51 is arranged on the bearing outer ring pressure cover 2. The ring body 51 is used to radially lock the bearing inner ring retaining ring 3. The conductive structure 52 is used to contact and conduct with the bearing outer ring pressure cover 2 and the bearing inner ring retaining ring 3 at both ends.

[0052] In this embodiment, the design of the locking conductive ring 5 includes two main parts: a ring body 51 and a conductive structure 52. The ring body 51 is the main body of the locking conductive ring 5, and is installed on the bearing outer ring gland 2. The main function of this ring body 51 is to achieve radial locking of the bearing inner ring retaining ring 3 to ensure that the bearing inner ring retaining ring 3 will not be displaced or vibrated during transportation or storage, thereby protecting the bearing from damage.

[0053] The conductive structure 52 is another key component of the locking conductive ring 5, which is responsible for contacting the bearing outer ring gland 2 and the bearing inner ring retaining ring 3 at both ends to achieve electrical conduction. This design ensures that during the operation of the motor, the current can effectively flow from the bearing outer ring gland 2 to the bearing inner ring retaining ring 3, thereby preventing the occurrence of electrical corrosion.

[0054] Through this design, the locking conductive ring 5 can not only physically protect the bearing, but also electrically protect the bearing from electrical corrosion, realizing an innovative two-in-one protection mechanism.

[0055] Please refer to Figures 5 to 8, wherein Figure 5 is a schematic diagram of the conductive structure provided in an embodiment of the present application, Figure 6 is a BB schematic diagram of Figure 5, Figure 7 is a dimensional diagram of the locking conductive ring provided in an embodiment of the present application, and Figure 8 is a schematic diagram of the ring body provided in an embodiment of the present application.

[0056] In some embodiments, the ring body 51 is provided with a mounting hole 511 ; the conductive structure 52 adopts the conductive method of carbon fiber, and the conductive structure 52 is a double-headed carbon fiber brush in which carbon fiber 521 is fixed by a hoop 522 , and the double-headed carbon fiber brush is provided in the mounting hole 511 .

[0057] In this embodiment, the ring body 51 is designed with a mounting hole 511, which is a specific area for mounting the conductive structure 52. The conductive structure 52 is composed of carbon fiber 521 and a ferrule 522, wherein the carbon fiber 521 is the main conductive material, and the ferrule 522 is used to fix the carbon fiber 521 to ensure that it is stably mounted on the ring body 51.

[0058] The conductive structure 52 adopts a double-headed carbon fiber brush design, which enables the brush head to be fixed in the mounting hole 511, and the two ends are respectively in contact with the bearing outer ring gland 2 and the bearing inner ring retaining ring 3. Such a layout allows the locking conductive ring 5 to establish an electrical conduction path between the bearing and the bearing outer ring gland 2, so that the shaft current can be effectively conducted when the motor is running to avoid the occurrence of electrical corrosion.

[0059] The locking conductive ring 5 combines the functions of a locking part and a fixing bracket of the carbon fiber brush. By installing the double-headed carbon fiber brush in the mounting hole 511 of the ring body 51, this technical solution not only ensures the mechanical strength and electrical conductivity of the locking conductive ring 5, but also provides a simple and effective installation method, which is convenient for assembly and replacement during motor manufacturing or maintenance.

[0060] Please continue to refer to FIG. 4 and FIG. 8 . In some embodiments, there are multiple conductive structures 52 , and the multiple conductive structures 52 are distributed along the circumference of the ring body 51 .

[0061] In this embodiment, the conductive structure 52 is not limited to one, but multiple conductive structures 52 are distributed along the circumference of the ring body 51. This design improves the reliability and stability of conduction, because even if a conductive structure 52 fails or is damaged, other conductive structures 52 can still maintain the flow of current to ensure the normal operation of the motor.

[0062] The multiple conductive structures 52 distributed along the circumference of the ring body 51 can more evenly conduct the current on the motor shaft, reducing local overheating or electrical corrosion caused by the current being concentrated at a certain point. In addition, this layout also helps to improve the balance of the bearing system, because the uniform distribution of the conductive structures 52 helps to maintain the weight balance of the ring body 51, which is very important for the stable operation of the motor bearing system.

[0063] In some embodiments, the ring body 51 is an open elastic ring with an upper portion separated to form an opening, the lower area of ​​the open elastic ring symmetrical to the opening is a reinforcement portion, and the area of ​​the open elastic ring other than the reinforcement portion is provided with a mounting hole 511.

[0064] In this embodiment, the ring body 51 is designed as an open elastic ring formed by a partition at the upper part. This design allows the ring body 51 to be wrapped around the bearing outer ring gland 2 like an elastic band, and its installation position can be adjusted through its opening. The design of the open elastic ring allows the ring body 51 to have a certain elasticity, so that it can adapt to bearing inner ring retaining rings 3 of different sizes, thereby providing more reliable radial locking.

[0065] On the open elastic ring, the lower area symmetrical to the opening is set as a reinforcement part. The function of this reinforcement part is to provide additional strength and rigidity, which helps to improve the mechanical strength of the ring body 51 and make it more durable.

[0066] Except for the reinforcement part, the rest of the open elastic ring is provided with mounting holes 511, which are used to fix the conductive structure 52. Through these mounting holes 511, the conductive structure 52 can be evenly distributed on the entire circumference of the ring body 51, thereby achieving effective axial electrical conduction.

[0067] This design allows the locking conductive ring 5 to effectively cooperate with the bearing inner ring retaining ring 3 in radial direction to achieve the locking function, and at the same time, the conductive structure 52 thereon is used to achieve electrical conduction to prevent electrical corrosion. In addition, the design of the open elastic ring also provides a certain degree of elasticity, so that the locking conductive ring 5 can adjust its radial position as needed to adapt to different working conditions.

[0068] Please refer to Figures 9 to 12, wherein Figure 9 is a partial view of M in Figure 1, Figure 10 is a schematic diagram of the bearing outer ring pressure cover provided in an embodiment of the present application, Figure 11 is a cross-sectional view of the bearing outer ring pressure cover provided in an embodiment of the present application, and Figure 12 is a cross-sectional view of the bearing inner ring retaining ring provided in an embodiment of the present application.

[0069] In some embodiments, a first annular surface 21 is provided at the axial end of the bearing outer ring cover 2 facing the locking conductive ring 5, and the first annular surface 21 is in contact and conduction with the locking conductive ring 5. A second annular surface 31 is provided at the axial end of the bearing inner ring retaining ring 3 facing the locking conductive ring 5, and the second annular surface 31 is in contact and conduction with the locking conductive ring 5.

[0070] In this embodiment, one axial end of the bearing outer ring gland 2 is designed and processed into a first annular surface 21. This special design enables the first annular surface 21 to contact the locking conductive ring 5. Through this design, the first annular surface 21 becomes part of the electrical conduction path, so that current can flow from the bearing outer ring gland 2 to the locking conductive ring 5.

[0071] Similarly, a second annular surface 31 is also designed at one axial end of the bearing inner ring retaining ring 3, which is also in contact with the locking conductive ring 5, forming another electrically conductive contact point. The second annular surface 31 allows current to flow from the locking conductive ring 5 to the bearing inner ring retaining ring 3, completing the electrically conductive circuit.

[0072] Taking the conductive structure 52 as a double-headed carbon fiber brush (fiber brush) in which carbon fiber 521 is fixed by a hoop 522 as an example, the first annular surface 21 is in contact and conduction with one side of the carbon fiber brush on the locking conductive ring 5, and the second annular surface 31 is in contact and conduction with the other side of the carbon fiber brush on the locking conductive ring 5.

[0073] This design ensures that the locking conductive ring 5 can not only achieve radial locking of the bearing inner ring retaining ring 3, but also achieve axial electrical conduction. The contact conduction design of the first annular surface 21 and the second annular surface 31 improves the efficiency and reliability of current extraction during motor operation, helps prevent the occurrence of electrical corrosion, and also ensures that the dual functions of the locking conductive ring 5 are effectively exerted.

[0074] In some embodiments, an annular groove 32 is provided on the radial side of the bearing inner ring retaining ring 3 facing the locking conductive ring 5, and the annular groove 32 is used to radially cooperate with the bearing inner ring retaining ring 3 after the locking conductive ring 5 moves radially.

[0075] In this embodiment, an annular groove 32 is designed on one radial side of the bearing inner ring retaining ring 3, and this structure is designed to radially cooperate with the locking conductive ring 5. When the locking conductive ring 5 needs to be radially locked with the bearing inner ring retaining ring 3, the locking conductive ring 5 will move radially and fit into the annular groove 32.

[0076] The presence of the annular groove 32 allows the locking conductive ring 5 to flexibly cooperate with the bearing inner ring retaining ring 3 in the radial direction, thereby achieving the locking function. This design allows the locking conductive ring 5 to provide a stable locking force when necessary to limit the displacement of the bearing inner ring retaining ring 3 and reduce damage to the bearing caused by vibration and impact during transportation or operation.

[0077] The locking conductive ring 5 is in contact with the bearing inner ring retaining ring 3 throughout the entire circumference through the annular groove 32, the force is evenly and stably applied, and the locking effect is good.

[0078] In some embodiments, an annular groove 22 is provided on the radial side of the bearing outer ring cover 2 facing the locking conductive ring 5 , and the annular groove 22 is provided with the locking conductive ring 5 .

[0079] In this embodiment, the design of the bearing outer ring gland 2 includes an annular groove 22 facing the radial side of the locking conductive ring 5. This annular groove 22 is specially designed to accommodate the locking conductive ring 5, and it allows the locking conductive ring 5 to move and position in the annular groove 22.

[0080] The ring body 51 of the locking conductive ring 5 is located in the annular groove 22 of the bearing outer ring gland 2 to maintain the axial position of the locking conductive ring 5. The design of the annular groove 22 allows the locking conductive ring 5 to be adjusted along the radial direction of the groove to adapt to different installation and operating conditions. When the bearing inner ring retaining ring 3 needs to be radially locked, the locking conductive ring 5 can be moved along the annular groove 22 to a position that matches the bearing inner ring retaining ring 3 to achieve locking.

[0081] In addition, the design of the annular groove 22 also helps to fix the position of the locking conductive ring 5 to prevent it from shifting during the operation of the motor, thereby ensuring that the locking conductive ring 5 can continuously and effectively lock and electrically conduct the bearing inner ring retaining ring 3.

[0082] This structural design allows the locking conductive ring 5 to radially lock the bearing inner ring retaining ring 3 without occupying additional space, while maintaining the compactness and efficiency of the motor. By designing the annular groove 22 on the bearing outer ring gland 2, without the need for an additional fixing structure, the technical solution provides an effective locking and conductive mechanism, enhancing the function and reliability of the motor bearing protection structure.

[0083] In some embodiments, an anti-rotation positioning groove 23 is provided on the radial side of the bearing outer ring pressure cover 2 facing the locking conductive ring 5; the locking conductive ring 5 is provided with an anti-rotation boss 53, the anti-rotation boss 53 is a structure on the ring body 51, the anti-rotation boss 53 is arranged in the anti-rotation positioning groove 23, and the anti-rotation boss 53 is provided with a process through hole 531.

[0084] In this embodiment, an anti-rotation positioning groove 23 is designed on one radial side of the bearing outer ring gland 2 to ensure that the locking conductive ring 5 does not rotate during installation and use. The existence of the anti-rotation positioning groove 23 provides a mechanical locking mechanism to ensure the positioning stability of the locking conductive ring 5 in the circumferential direction.

[0085] The locking conductive ring 5 is designed with an anti-rotation boss 53, which just matches the anti-rotation positioning groove 23 on the bearing outer ring gland 2. Through such a match, the anti-rotation boss 53 is fixed in the anti-rotation positioning groove 23, thereby preventing the locking conductive ring 5 from rotating, ensuring the stability of the locking conductive ring 5 during the operation of the motor.

[0086] In addition, a process through hole 531 is provided on the anti-rotation boss 53. The design of this through hole is mainly to facilitate the installation and removal of the locking conductive ring 5 during the manufacturing and maintenance process. The process through hole 531 can be used to insert tools or fixings, making the assembly and adjustment process of the locking conductive ring 5 more convenient and quick.

[0087] In some cases, an anti-rotation boss 53 is respectively provided at both ends of the upper portion of the ring body 51 , and the two anti-rotation bosses 53 cooperate with the corresponding anti-rotation positioning grooves 23 .

[0088] In some embodiments, a force transmission boss 54 is provided on the radial side of the locking conductive ring 5 facing the bearing outer ring pressure cover 2, and the force transmission boss 54 is a structure on the ring body 51; the bearing outer ring pressure cover 2 is provided with an adjusting member 6, and the adjusting member 6 is used to move radially and drive the locking conductive ring 5 to radially contract through the force transmission boss 54; the locking conductive ring 5 is elastic, and the locking conductive ring 5 is separated from the bearing inner ring retaining ring 3 in the absence of external force.

[0089] In this embodiment, the design of the locking conductive ring 5 pays special attention to its interaction with the bearing outer ring gland 2. A force transmission boss 54 is provided on one radial side of the locking conductive ring 5, which is to achieve mechanical connection and force transmission with the bearing outer ring gland 2. The presence of the force transmission boss 54 enables the locking conductive ring 5 to achieve radial movement by directly interacting with the adjustment member 6 of the bearing outer ring gland 2.

[0090] The bearing outer ring gland 2 is equipped with an adjusting member 6, which is designed to move in the radial direction and drive the locking conductive ring 5 to contract radially through the force transmission boss 54. This design allows the adjusting member 6 to control the fastening state of the locking conductive ring 5 through simple radial movement, thereby achieving effective locking of the bearing inner ring retaining ring 3. Through the operation of the adjusting member 6, the position of the locking conductive ring 5 can be easily adjusted to adapt to different working conditions and requirements.

[0091] The locking conductive ring 5 itself is designed to be elastic, which means that in the absence of external force, the locking conductive ring 5 will naturally remain separated from the bearing inner ring retaining ring 3. This elastic design not only helps to simplify the installation and disassembly process, but also provides necessary buffering during the operation of the motor, reducing damage to the bearing caused by vibration or impact.

[0092] In some embodiments, the number of force transmission bosses 54 is three, and the three force transmission bosses 54 are distributed along the circumference of the locking conductive ring 5; the bearing outer ring pressure cover 2 is provided with three mounting structures 24 distributed along the circumference; the number of adjusting members 6 is three, and the adjusting members 6 are provided on the mounting structure 24 and move through threads.

[0093] In this embodiment, there are three force transmission bosses 54, which are evenly distributed along the circumference of the locking conductive ring 5. Such a design helps to achieve uniform force transmission around the locking conductive ring 5, ensuring that the force can be evenly distributed on the locking conductive ring 5 during the locking operation.

[0094] The bearing outer ring gland 2 is provided with three mounting structures 24, which are also distributed along the circumferential direction and correspond to the positions of the force transmission bosses 54. Each mounting structure 24 includes a mounting sink and a threaded hole, which are specially designed for the installation and threaded movement of the locking screw (i.e., the adjusting member 6).

[0095] There are also three adjusting members 6, i.e. locking screws, in this embodiment, which are respectively installed in corresponding mounting structures 24. By rotating the adjusting members 6, i.e. locking screws, the force transmission boss 54 can be pushed axially, thereby controlling the radial contraction of the locking conductive ring 5, and the expansion of the locking conductive ring 5 is achieved through its own elastic recovery.

[0096] The design of the mounting structure 24 allows the locking screw (adjusting member 6) to be easily installed and removed, while also providing a stable support for the locking screw. The design of the threaded hole allows the locking screw to move smoothly when rotating, ensuring the accuracy and reliability of the locking operation.

[0097] Optionally, the annular groove 32 is a V-shaped groove.

[0098] The present application also provides a motor, including an end cover 1, a bearing 7, a rotating shaft 4 and the above-mentioned motor bearing protection structure. In the radial direction, the bearing 7 and the motor bearing protection structure are arranged between the end cover 1 and the rotating shaft 4, and in the axial direction, the motor bearing protection structure is arranged at one end of the bearing 7.

[0099] The motor includes the above motor bearing protection structure and should have all the beneficial effects of the above motor bearing protection structure.

[0100] When in use, the bearing outer ring pressure cover 2 is installed and fixed on the end cover 1 by bolts, and the bearing outer ring pressure cover 2 is a stationary component; the bearing inner ring retaining ring 3 is fixed on the rotating shaft 4, and the bearing inner ring retaining ring 3 is a rotating component.

[0101] The locking conductive ring 5 is stuck in the annular groove 22 of the bearing outer ring cover 2. The locking conductive ring 5 contacts the annular groove 32 of the bearing inner ring retaining ring 3 through three locking screws. The conductive structure 52 on the locking conductive ring 5 contacts the annular planes of the bearing outer ring cover 2 and the bearing inner ring retaining ring 3, thereby achieving the functions of transportation locking and operation short-circuiting the inner and outer rings of the bearing to derive the shaft current.

[0102] In the axial direction, the distance between the first annular surface 21 and the second annular surface 31 is L1, and the distance between the two ends of the conductive structure 52 is L0, L1<L0, so that reliable axial contact is achieved.

[0103] In the radial direction, there is a matching clearance of △ between the inner diameter of the locking conductive ring 5 and the bearing inner ring retaining ring 3. When the locking screw is loosened, a normal operating clearance is maintained, and the conductive structure 52 on the locking conductive ring 5 is always in contact and is not affected by whether the locking screw is tightened.

[0104] For other sizes, the locking conductive ring 5 can be installed in the annular groove 22 of the bearing outer ring gland 2 by its own elasticity. The diameter D1 of the annular groove 22 matches the outer diameter D2 of the clamping ring bracket, and D2>D1. A number of mounting holes 511 are evenly distributed on the left and right sides of the locking conductive ring 5. The hole diameter φA matches the outer diameter of the hoop 522. The angle of the hole is α. By setting different α angles to arrange the conductive structure 52 and adjusting the number, the initial contact stiffness can be set and adjusted.

[0105] The anti-rotation boss 53 at the opening is a raised semicircle with a radius of r. There is a process through hole 531 for installation on the semicircle, with a hole diameter of φB. The locking conductive ring 5 can be easily installed into the annular groove 22 or disassembled from the annular groove 22 by using circlip pliers.

[0106] There are two anti-rotation positioning grooves 23 with a radius of R above the annular groove 22 of the bearing outer ring cover 2. When the locking conductive ring 5 is installed, the raised semicircle with a radius of r falls into the anti-rotation positioning groove 23 with a radius of R to prevent the locking conductive ring 5 from rotating when the carbon fiber contact is running.

[0107] The annular groove 22 of the bearing outer ring gland 2 has an axial width H that matches the thickness h of the locking conductive ring 5. The locking conductive ring 5 has three force transmission bosses 54, which are protrusions with an outer circle of D2. The positions of the force transmission bosses 54 correspond to the three threaded holes on the bearing outer ring gland 2. When the locking bolt is tightened, it acts on the force transmission bosses 54, causing the locking conductive ring 5 to deform and shrink, and enter the annular groove 32 of the bearing inner ring retaining ring 3 to lock the rotating shaft 4 as the rotor; by selecting appropriate D1 and D2, there is an appropriate radial elastic pressure between the locking conductive ring 5 and the annular groove 22, thereby ensuring that the locking conductive ring 5 is in contact and positioned with the gland annular groove 22.

[0108] In a specific implementation, for the product operating state, there is a matching clearance of △ between the inner diameter of the locking conductive ring 5 and the bearing inner ring retaining ring 3. When the locking screw is loosened, a normal operating clearance is maintained to ensure normal operation of the bearing.

[0109] For the transport locking state, the locking screw is used to tighten the force transmission boss 54 of the locking conductive ring 5 to achieve the contraction of the locking conductive ring 5 until it forms mechanical contact with the annular groove 32 of the bearing inner ring retaining ring 3, supporting the rotating shaft 4 to unload the load of the bearing, that is, the locking conductive ring 5 temporarily replaces the supporting function of the bearing, so that the bearing force is zero, thereby achieving the purpose of protecting the bearing.

[0110] For switching between the product operation state and the transportation locking state, in the operation state, the locking screw is removed, the locking conductive ring 5 elastically deforms to restore the original state, away from the annular groove 32 of the bearing inner ring retaining ring 3, and a labyrinth gap is formed between the two to achieve the operation state. To realize the transportation locking function, it is only necessary to tighten the locking screw to support the locking conductive ring 5 and then lock the bearing inner ring retaining ring 3.

[0111] It should be noted that many of the components mentioned in this application are universal standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or through conventional experimental methods.

[0112] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0113] The motor bearing protection structure and the motor provided by the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A motor bearing protection structure, integrated in the motor, characterized in that: The motor bearing protection structure includes a bearing outer ring pressure cover and a bearing inner ring retaining ring located at one axial end of the motor bearing, the bearing outer ring pressure cover is arranged on the end cover, the bearing inner ring retaining ring is arranged on the rotating shaft, the bearing outer ring pressure cover is provided with a locking conductive ring, the axial ends of the locking conductive ring are respectively in contact with the bearing outer ring pressure cover and the bearing inner ring retaining ring to achieve electrical conduction, the radial position of the locking conductive ring is variable, and the bearing inner ring retaining ring is locked when the locking conductive ring is radially matched with the bearing inner ring retaining ring.

2. The motor bearing protection structure according to claim 1, characterized in that: The locking conductive ring includes a ring body and a conductive structure arranged on the ring body, the ring body is arranged on the bearing outer ring pressure cover, the ring body is used to radially lock the bearing inner ring retaining ring, and the conductive structure is used to contact and conduct with the bearing outer ring pressure cover and the bearing inner ring retaining ring at both ends.

3. The motor bearing protection structure according to claim 2, characterized in that: The ring body is provided with a mounting hole; the conductive structure is a double-headed carbon fiber brush in which carbon fiber is fixed by a ferrule, and the double-headed carbon fiber brush is arranged in the mounting hole.

4. The motor bearing protection structure according to claim 2, characterized in that: There are multiple conductive structures, and the multiple conductive structures are distributed along the circumference of the ring body.

5. The motor bearing protection structure according to claim 3, characterized in that: The ring body is an open elastic ring with an upper portion separated to form an opening, the lower area of ​​the open elastic ring symmetrical to the opening is a reinforcement part, and the installation hole is arranged in the area of ​​the open elastic ring except the reinforcement part.

6. The motor bearing protection structure according to claim 1, characterized in that: A first annular surface is provided at one axial end of the bearing outer ring pressure cover facing the locking conductive ring, and the first annular surface is in contact and conduction with one side of the carbon fiber brush on the locking conductive ring. A second annular surface is provided at one axial end of the bearing inner ring retaining ring facing the locking conductive ring, and the second annular surface is in contact and conduction with the other side of the carbon fiber brush on the locking conductive ring.

7. The motor bearing protection structure according to claim 1, characterized in that: The bearing inner ring retaining ring is provided with an annular groove on the radial side facing the locking conductive ring, and the annular groove is used to radially cooperate with the bearing inner ring retaining ring after the locking conductive ring moves radially; and / or, The bearing outer ring gland is provided with an annular groove on the radial side facing the locking conductive ring, and the locking conductive ring is provided in the annular groove; and / or, An anti-rotation positioning groove is provided on the radial side of the bearing outer ring pressure cover facing the locking conductive ring; the locking conductive ring is provided with an anti-rotation boss, the anti-rotation boss is arranged in the anti-rotation positioning groove, and the anti-rotation boss is provided with a process through hole.

8. The motor bearing protection structure according to claim 1, characterized in that: A force transmission boss is provided on the radial side of the locking conductive ring facing the bearing outer ring cover; the bearing outer ring cover is provided with an adjusting member, and the adjusting member is used to move radially and drive the locking conductive ring to radially contract through the force transmission boss; the locking conductive ring is elastic and is separated from the bearing inner ring retaining ring in the absence of external force.

9. The motor bearing protection structure according to claim 8, characterized in that: The number of the force transmission bosses is three, and the three force transmission bosses are distributed along the circumference of the locking conductive ring; the bearing outer ring cover is provided with three mounting structures distributed along the circumference; the number of the adjusting members is three, and the adjusting members are arranged on the mounting structures and move through threads.

10. A motor, characterized in that: It comprises an end cover, a bearing, a rotating shaft and a motor bearing protection structure as described in any one of claims 1 to 9, wherein in the radial direction, the bearing and the motor bearing protection structure are arranged between the end cover and the rotating shaft, and in the axial direction, the motor bearing protection structure is arranged at one end of the bearing.

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