Retainer type conducting ring and motor

Abstract

The utility model provides a retainer type conducting ring and a motor, which are applied to the technical field of conducting rings, and are characterized in that an annular retainer is provided with a mounting part for mounting a conducting part; the annular retainer is arranged on the placing annular plate, the cover plate is located above the annular retainer, and the cover plate and the placing annular plate are matched to clamp the conductive part, so that the conductive part is pressed into the mounting part in an interference manner; the outer ring plate is fixed on the placing ring plate, the outer ring plate is arranged around the outer side of the annular retainer, and a gap exists between the outer ring plate and the outer side of the annular retainer. Due to the fact that the annular retainer and the outer ring support are separated, and the gap exists between the annular retainer and the outer ring plate, the deformation quantity of the annular retainer can be contained, the deformation is difficult to transmit to the outer ring plate, the shape of the outer diameter part of the base is kept, and the yield of the conducting ring when the conducting ring is installed into a machine shell is improved.

Description

Technical Field

[0001] This application relates to the field of conductive ring technology, specifically to a cage-type conductive ring and a motor. Background Technology

[0002] With the widespread adoption of 800V technology in new energy vehicles, higher voltage levels present new challenges to drive systems. The induced voltage generated by the motor rotor is increasing. When the oil film in the bearing fails to provide effective insulation, the energy accumulated by the rotor can create an electric arc when it breaks down the insulating oil film, damaging the bearing balls and raceways. The damaged balls and raceways become weak points in the entire bearing oil film, thus accelerating the frequency of arcing damage and speeding up the failure rate. Therefore, bearing protection devices are typically used to protect the motor bearings during operation. These devices effectively control shaft voltage and bearing current. Existing bearing protection solutions involve establishing a shaft voltage discharge channel outside the bearing to reduce voltage and protect it from electro-corrosion, thereby extending the bearing's service life.

[0003] A protective conductive ring exists in related technologies, comprising a ring-shaped base, a conductive component, and a cover plate. The ring-shaped base has a mounting groove for installing the conductive component. The cover plate and base cooperate to clamp the conductive component, thus press-fitting it into the mounting groove. The conductive component protrudes from the inner edge of the ring-shaped base to facilitate contact with the component to be conductive. However, the process of press-fitting the conductive component into the mounting groove can cause deformation of the outer diameter of the base, leading to installation defects.

[0004] Therefore, a new technological solution is needed. Utility Model Content

[0005] In view of this, this application provides a cage-type conductive ring and a motor.

[0006] This application provides the following technical solution:

[0007] According to the present application, a cage-type conductive ring includes a base, a cover plate, and a conductive component. The base includes an outer ring support and an annular retainer. The outer ring support includes a ring placement plate and an outer ring plate.

[0008] The annular retainer has a mounting portion for mounting a conductive component. The annular retainer is placed on the placement ring plate, and the cover plate is located above the annular retainer. The cover plate and the placement ring plate cooperate to clamp the conductive component so that the conductive component is press-fitted into the mounting portion.

[0009] The outer ring plate is fixed to the placement ring plate, and the outer ring plate is arranged around the outside of the annular retainer. There is a gap between the outer ring plate and the outside of the annular retainer so that the gap can accommodate the deformation of the annular retainer.

[0010] Preferably, the gap is formed as an annular gap, and the gap distance of the annular gap is 0.3 to 0.7 mm.

[0011] Preferably, the outer ring plate is located at the edge of the placement ring plate, and the outer ring bracket is a stamped plate.

[0012] Preferably, the outer ring plate is configured as an elastic thin plate.

[0013] Preferably, the thickness of the outer ring plate is between 0.2 mm and 0.5 mm.

[0014] Preferably, the annular retainer is a die-cast part.

[0015] Preferably, the mounting portion is configured as a mounting hole, the mounting hole extending into the inner side of the annular retainer, and the conductive element protruding into the inner side of the base.

[0016] Preferably, the conductive elements are arranged in multiple configurations around the base, and the mounting holes are distributed in a ring around the annular retainer.

[0017] Preferably, the cover plate is a stamped annular plate.

[0018] Preferably, the conductive element includes a fiber retainer and a conductive fiber with one end fixed in the fiber retainer, and the other end of the conductive fiber protruding from the inner edge of the base.

[0019] According to this application, an electric motor is also provided, including a motor housing, a motor shaft, and a cage-type conductive ring as described above, wherein the outer ring bracket is installed in the motor housing so that the conductive element overlaps the motor shaft.

[0020] Compared with the prior art, the beneficial effects that at least one of the above-mentioned technical solutions adopted in this application can achieve include at least:

[0021] This application uses a cover plate and a placement ring plate to clamp the conductive component, so that the conductive component is press-fitted into the mounting part. Since the annular retainer and the outer ring support are designed separately, and there is a gap between the annular retainer and the outer ring plate, the deformation of the annular retainer can be accommodated, making it more difficult for the deformation to be transmitted to the outer ring plate, maintaining the shape of the outer diameter part of the base, and improving the yield of the conductive ring when it is installed into the housing. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional view of the conductive ring in this application without rivets;

[0024] Figure 2 This is a first exploded view of the conductive ring in this application without rivets;

[0025] Figure 3 This is a second exploded view of the conductive ring in this application without rivets;

[0026] Figure 4 This is a schematic diagram of the rivet in this application;

[0027] Figure 5 This is an exploded view of the conductive ring in this application;

[0028] Figure 6 This is a schematic diagram of the annular gap of the protruding conductive ring in this application;

[0029] Figure 7 This is a partial schematic diagram of the conductive components before assembly in this application;

[0030] Figure 8 This is a partial schematic diagram of the assembled conductive components in this application;

[0031] Figure 9 This is a partial exploded view highlighting the circumferential and radial draft angles of the conductive ring in this application.

[0032] Reference numerals: 1. Base; 101. Outer ring bracket; 1011. Placement ring plate; 1012. Outer ring plate; 102. Annular retainer; 2. Conductive component; 3. Rivet; 301. Limiting part; 302. Column part; 4. Cover plate; 5. First fixing hole; 6. Second fixing hole; 7. Mounting groove; 8. Annular gap; 9. Positioning hole part; 10. Hole part. Detailed Implementation

[0033] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0034] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0036] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0037] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0038] In view of this, the applicant, through in-depth research and improvement exploration of conductive rings, discovered that Chinese utility model patent document CN217643069U discloses a fiber fastener, a bearing electro-corrosion protection conductive ring, and a motor. The fiber fastener is mounted via a bracket, and a cover plate is fixed to the outside. However, its structure is relatively complex, the installation process is cumbersome, and the manufacturing cost is high. Although the above technical solutions can meet the requirements, some problems still exist. Existing technology uses a design where the base and rivets are die-cast as a single unit. The base can be equivalent to the bracket in the aforementioned patent document. During the production process, it was found that the rivets are prone to cracking, and the riveting process can cause deformation of the base's outer diameter. For example, the axial force of the riveting causes pressure deformation of the base. Once the outer diameter deforms, the outer diameter dimension and cylindricity may exceed the specified range, leading to problems during customer installation.

[0039] Based on this, the technical solutions provided by the various embodiments of this application will be described below with reference to the accompanying drawings.

[0040] This specification provides an embodiment of a cage-type conductive ring, such as... Figure 1 , Figure 2 as well as Figure 3 As shown, it includes a base 1, a cover plate 4 and a conductive component 2. The base 1 includes an outer ring bracket 101 and an annular retainer 102. The outer ring bracket 101 includes a ring plate 1011 and an outer ring plate 1012. The annular retainer 102 has a mounting portion for mounting the conductive element 2. The mounting portion has a certain hole structure or is directly set as a mounting hole, and the mounting hole extends towards the inner side of the annular retainer 102 so that the conductive element 2 protrudes from the inner side of the base 1. The annular retainer 102 is placed on the placement ring plate 1011, and the cover plate 4 is located above the annular retainer 102. The cover plate 4 and the placement ring plate 1011 cooperate to clamp the conductive element 2 so that the conductive element 2 is press-fitted into the mounting hole. The outer ring plate 1012 is fixed on the placement ring plate 1011, and the outer ring plate 1012 is arranged around the outer side of the annular retainer 102. There is a gap between the outer ring plate 1012 and the outer side of the annular retainer 102 so that the gap can accommodate the deformation of the annular retainer 102.

[0041] The base 1 is annular, and there is a gap between the annular retainer 102 and the outer ring support 101. During the riveting process, the annular retainer 102 is deformed by the pressure. Due to the existence of the gap, the radial deformation of the annular retainer 102 will not be transmitted to the outer ring support 101, and will not cause deformation of the outer diameter of the base 1, thus optimizing the performance of the finished product and improving the yield.

[0042] In one embodiment, such as Figure 1 and Figure 6 As shown, the gap is formed as an annular gap 8, and the gap distance of the annular gap 8 is 0.3 to 0.7 mm. The gap distance of the annular gap 8 is preferably 0.5 mm.

[0043] In one embodiment, such as Figure 1 and Figure 2 As shown, the outer ring plate 1012 is located at the edge of the ring plate 1011, and the outer ring bracket 101 is a stamped plate.

[0044] In one embodiment, such as Figure 2 As shown, the outer ring plate 1012 is configured as an elastic thin plate.

[0045] In one embodiment, such as Figure 2 As shown, the thickness of the outer ring plate 1012 is between 0.2 mm and 0.5 mm.

[0046] In one embodiment, such as Figure 2 As shown, the annular retainer 102 is a die-cast part. The annular retainer 102 is manufactured using a die-casting process.

[0047] In one embodiment, such as Figure 4 and Figure 5 As shown, the conductive ring also includes a rivet 3; the rivet 3 includes a limiting part 301 and a column part 302 fixed on the limiting part 301. A first fixing hole 5 is provided on the base 1 and a second fixing hole 6 is provided on the cover plate 4. The column part 302 passes through the first fixing hole 5 and the second fixing hole 6. The limiting part 301 is located on the side of the base 1 away from the cover plate 4 or the side of the cover plate 4 away from the base 1, so that the rivet 3 is riveted and deformed by the column part 302 to fix and connect the base 1 and the cover plate 4.

[0048] When riveting 3, the limiting part 301 supports the riveting fixture instead of the base 1, reducing the probability of deformation of the base 1. Before riveting, the column part 302 can be appropriately inserted or substantially inserted with the first fixing hole 5 and the second fixing hole 6, with a gap of about 0.1mm. Both the rivet 3 and the conductive part 2 can be manufactured by machine tool processing. The column part 302 has a mounting groove 7 on the side opposite to the limiting part 301 to facilitate riveting positioning. The first fixing hole 5 passes through the ring plate 1011 and the annular retainer 102.

[0049] In the related technology, the base 1 is used to place the conductive component 2, the rivet 3 is integrally die-cast on the base 1, the cover plate 4 is located above the base 1, the rivet 3 passes through the cover plate 4, and the cover plate 4 is riveted to the base 1 by the rivet 3 so that the cover plate 4 and the base 1 cooperate to fix the conductive component 2. However, the rivet 3 is integrally die-cast on the base 1, and the rivet 3 will cause the base 1 to be easily deformed during the riveting process, and the size of the base 1 will easily exceed the specified range, which will easily cause problems during the installation of the base 1.

[0050] In this application, the column part 302 of the rivet 3 passes through the first fixing hole 5 of the base 1 and the second fixing hole 6 of the cover plate 4. The rivet 3 is supported by the limiting part 301 of the rivet 3. When riveting, the rivet 3 bears the riveting axial force through the limiting part 301. The base 1 and the rivet 3 are no longer die-cast as a whole. Therefore, the rivet 1 is not supported by the riveting fixture, which reduces the probability of deformation of the base 1 and keeps the size of the base 1 within the specified range. There is also no problem of cracking of the rivet 3 caused by the rivet 3 and the base 1 being die-cast as a whole. This reduces the defect rate of the base 1 when it is installed into the housing.

[0051] In one embodiment, such as Figure 4 As shown, rivet 3 is a nail-shaped object made of a high-ductility material. In related technologies, both the base 1 and rivet 3 are made of ADC12 die-cast aluminum. In this application, the base 1 can still be made of ADC12 die-cast aluminum. The preferred high-ductility material is 6061-T6 or 5052-0 aluminum alloy, which improves the riveting quality, solves the problem of rivet 3 cracking, and increases the yield rate.

[0052] In one embodiment, such as Figure 2 and Figure 4 As shown, the limiting part 301 abuts against the side of the placing ring plate 1011 away from the cover plate 4, and the rivet 3 and the outer ring bracket 101 form a stamped pre-fixed part. The rivet 3 and the outer ring bracket 101 are connected by stamping pre-fixing. The outer ring bracket 101 is made by stamping process and the single rivet 3 is embedded into the outer piece to form a part, which reduces the design difficulty of the automated production line.

[0053] In one embodiment, such as Figure 2 and Figure 5 As shown, the second fixing hole 6 forms a first countersunk hole away from the opening of the ring plate 1011, so that the end of the column part 302 away from the limiting part 301 is placed in the first countersunk hole after being deformed by riveting; and / or, the first fixing hole 5 forms a second countersunk hole away from the opening of the cover plate 4, so that the limiting part 301 is placed in the second countersunk hole.

[0054] The cover plate 4, together with the ring plate 1011, clamps the annular retainer 102 and the conductive component 2. The head of the rivet 3, after being riveted, is accommodated through the first countersunk hole on the cover plate 4, preventing it from protruding from the finished product end face and affecting customer installation and use. Similarly, the head of the rivet 3 is accommodated through the second countersunk hole on the base 1, preventing it from protruding from the finished product end face and affecting customer installation and use.

[0055] In one embodiment, such as Figure 2 and Figure 6As shown, mounting holes are arranged in a ring around the annular retainer 102. The conductive element 2 is press-fitted into the mounting holes. The end of the conductive element 2 placed in the mounting hole is provided with a first positioning part. The mounting hole includes a positioning hole part 9 and a hole body part 10. The hole body part 10 connects the positioning hole part 9 and the inner side of the annular retainer 102. The first positioning part is inserted into the positioning hole part 9. The conductive element 2 is also provided with a second positioning part, which abuts against the inner side of the annular retainer 102. The conductive element 2 between the first positioning part and the second positioning part is located in the hole body part 10, and the exposed conductive element 2 is located in the inner side of the annular retainer 102.

[0056] In related technologies, the fixation of the conductive ring to the conductive component 2 is poor, and the uniformity is difficult to meet requirements. This application improves the fixation and uniformity of the conductive ring to the conductive component 2 by pressing the conductive component 2 into the mounting hole, initially positioning it by inserting the first positioning part into the positioning hole part 9, and then performing secondary positioning by the second positioning part abutting against the inner side of the annular retainer 102. The annular retainer 102 fixes the fiber fastener assembly through a pre-reserved T-shaped groove, ensuring an interference fit between the T-shaped groove and the fiber fastener assembly in both the circumferential and radial directions.

[0057] In one embodiment, such as Figure 2 As shown, the first positioning part and the second positioning part are arranged in a ring around the fiber fixator. The first positioning part and the second positioning part are sandwiched between the placement ring plate 1011 and the cover plate 4.

[0058] In one embodiment, such as Figure 2 As shown, the conductive component 2 includes a fiber retainer and a conductive fiber fixed at one end in the fiber retainer, with the other end of the conductive fiber protruding from the inner edge of the base 1. A first positioning part and a second positioning part are disposed at both ends of the fiber retainer along the fiber bundle insertion direction.

[0059] In this process, conductive fibers (fiber bundles) are inserted into the fiber fixer and the wire fibers are riveted and fixed to form conductive component 2 (fiber fixer assembly).

[0060] In one embodiment, such as Figure 7 , Figure 8 as well as Figure 9 The diameter of the mounting hole gradually decreases from the upper opening to the lower opening, so that the interference fit of the conductive element 2 gradually increases when it is press-fitted into the mounting hole.

[0061] In one embodiment, such as Figure 9 As shown, the mounting holes are set at an angle relative to each other in the circumferential and / or radial directions of the base 1.

[0062] In one embodiment, such as Figure 9As shown, the diameter of the upper inner ring opening to the lower inner ring opening of the annular retainer 102 gradually increases, so that the interference fit of the conductive element 2 is further gradually increased when it is press-fitted into the mounting hole.

[0063] In one embodiment, such as Figure 9 As shown, the inner side of the annular retainer 102 is inclined relative to each other.

[0064] Due to the draft angle design, the T-groove forms a V-shaped cross-section. When the conductive component 2 is pressed into the T-groove, the interference fit increases as the draft angle increases, ultimately achieving a circumferential fastening of the fiber fastener. Similarly, in the radial direction, due to the draft angle design, the conductive component 2 also experiences a radial fastening as it is pressed in, with the interference fit increasing as the draft angle increases.

[0065] In one embodiment, such as Figure 2 and Figure 5 As shown, there are multiple rivets 3 and conductive elements 2 arranged around the base 1; the rivets 3 are spaced apart from each other by multiple conductive elements 2, for example, there are 8 rivets 3, and the number of conductive elements 2 spaced between the rivets 3 is, for example, 3.

[0066] In one embodiment, such as Figure 2 As shown, the cover plate 4 is annular to facilitate stamping. The cage-type conductive ring of this application provides all the requirements for product positioning, eliminates the grooves originally designed on the top cover, reduces the manufacturing difficulty of the top cover, and allows the top cover to be manufactured using a stamping process, thereby reducing costs.

[0067] This specification also discloses an electric motor, including a motor housing, a motor shaft, and a cage-type conductive ring of any of the above embodiments, wherein the outer ring bracket 101 is installed in the motor housing so that the conductive element 2 overlaps the motor shaft.

[0068] This application relates to the fields of new energy vehicle electric drive systems, servo motor technology, high-power white goods, generators, and large-scale special machinery and equipment. This application describes a conductive ring with a multi-piece retainer structure. The rivet 3 design is changed to a single standard rivet 3, using a high-ductility material to improve the problem of rivet 3 cracking after riveting. This application changes the base 1 to a two-piece design: one is an outer ring support 101, and the other is an annular retainer 102. A gap is left between the inner diameter of the outer ring support 101 and the annular retainer 102. During riveting, the deformation of the annular retainer 102 will not be transmitted to the outer ring support 101 due to the gap, thus improving product yield.

[0069] This application solves the problem of rivet 3 cracking due to the rivet 3 being made of the same material as the base 1 in existing solutions; it also solves the problem of outer diameter deformation of the base 1 under stress due to the rivet 3 being integrated with the base 1. This application simplifies the design difficulty of automated production lines by changing the manufacturing process of the base 1, embedding the individual rivet 3 into the base 1, thereby improving product performance while reducing production costs. This application reduces the design difficulty and initial investment of automated production lines, improves the technical difficulties of existing solutions, simplifies the design difficulty of individual parts, reduces the cost of individual product parts, and the stamped outer ring bracket 101 design reduces the difficulty and requirements for customer installation.

[0070] This application utilizes mounting holes to clamp the conductive component 2 between the placement ring plate 1011 and the cover plate 4; the cover plate 4 is installed onto the annular retainer 102, and rivets 3 are passed through the cover plate 4, the annular retainer 102, and the placement ring plate 1011. The components are then fixed together using a riveting process to form the final product. The finished product is installed and used by interference fitting between the outer surface of the conductive ring and the customer's mounting holes (e.g., mounting holes on the housing).

[0071] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the descriptions of the embodiments described later are relatively simple, and relevant parts can be referred to the descriptions of the foregoing embodiments.

[0072] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A cage-type conductive ring, characterized in that, The device includes a base, a cover plate, and conductive components. The base includes an outer ring support and an annular retainer. The outer ring support includes a placement ring plate and an outer ring plate. The annular retainer has a mounting portion for mounting a conductive component. The annular retainer is placed on the placement ring plate, and the cover plate is located above the annular retainer. The cover plate and the placement ring plate cooperate to clamp the conductive component so that the conductive component is press-fitted into the mounting portion. The outer ring plate is fixed to the placement ring plate, and the outer ring plate is arranged around the outside of the annular retainer. There is a gap between the outer ring plate and the outside of the annular retainer so that the gap can accommodate the deformation of the annular retainer.

2. The cage-type conductive ring according to claim 1, characterized in that, The gap is formed as an annular gap, and the gap distance of the annular gap is 0.3 to 0.7 mm.

3. The cage-type conductive ring according to claim 1, characterized in that, The outer ring plate is located at the edge of the placement ring plate, and the outer ring bracket is a stamped plate.

4. The cage-type conductive ring according to claim 1, characterized in that, The outer ring plate is configured as an elastic thin plate.

5. The cage-type conductive ring according to claim 4, characterized in that, The thickness of the outer ring plate is between 0.2 mm and 0.5 mm.

6. The cage-type conductive ring according to claim 1, characterized in that, The annular retainer is a die-cast part.

7. The cage-type conductive ring according to claim 1, characterized in that, The mounting portion is configured as a mounting hole, which extends into the inner side of the annular retainer, and the conductive element is positioned to protrude from the inner side of the base.

8. The cage-type conductive ring according to claim 7, characterized in that, The conductive components are arranged in multiple configurations around the base, and the mounting holes are distributed in a ring around the annular retainer.

9. The cage-type conductive ring according to claim 1, characterized in that, The cover plate is a stamped annular plate.

10. The cage-type conductive ring according to claim 1, characterized in that, The conductive component includes a fiber retainer and a conductive fiber fixed at one end in the fiber retainer, with the other end of the conductive fiber protruding from the inner edge of the base.

11. An electric motor, characterized in that, It includes a motor housing, a motor shaft, and a cage-type conductive ring as described in any one of claims 1 to 10, wherein the outer ring bracket is installed in the motor housing so that the conductive element overlaps the motor shaft.

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