A robust conductive ring and trolley drive system

Abstract

The embodiment of the specification provides a stable conductive ring and a trolley drive system. The conductive ring comprises a cover ring, a base ring and a plurality of conductive pieces. The cover ring and the base ring are matched with each other. First ends of the plurality of conductive pieces are installed between the cover ring and the base ring. Second ends of the conductive pieces extend to the inner side of the cover ring and / or the base ring. Grooves for installing the conductive pieces are arranged on the base ring and / or the cover ring. The first ends of the conductive pieces are at least partially embedded in the grooves. The conductive ring further comprises an elastic body, which is at least partially embedded in the groove. When the cover ring and the base ring are connected in a matched mode, the cover ring and / or the base ring compress and deform the elastic body, so that the elastic body abuts against the conductive pieces, thereby fixing the first ends of the conductive pieces in the grooves. By arranging the elastic body, when the cover ring and the base ring are connected in a matched mode, the elastic body is compressed and deformed, so that the elastic body abuts against the conductive pieces, thereby tightly fixing the first ends of the conductive pieces in the grooves and ensuring the fixing effect of the conductive pieces.

Description

Technical Field

[0001] This specification relates to the field of electric drive system technology for new energy vehicles, specifically to a stable conductive ring and an electric vehicle drive system. Background Technology

[0002] With the booming development of the new energy vehicle industry, 800V technology, with its significant advantages such as fast charging and efficient energy transmission, is gradually becoming the mainstream technology development direction in the industry and is being increasingly widely adopted. However, with the significant increase in voltage level, the drive system of new energy vehicles faces new technical challenges. In the drive motor system of new energy vehicles, the motor rotor generates an induced voltage during high-speed rotation due to the principle of electromagnetic induction. With the introduction of 800V technology, the operating voltage of the motor has increased significantly, and the induced voltage generated by the rotor has also risen sharply.

[0003] As a key component supporting rotor rotation and ensuring normal motor operation, motor bearings typically contain an internal oil film. Under normal operating conditions, this oil film provides insulation, preventing accumulated rotor charge from being directly conducted to other bearing components. However, when the rotor induced voltage is too high, the electric field strength borne by the oil film in the bearing increases significantly. When the oil film fails to meet effective insulation requirements, the accumulated charge energy of the rotor is released instantaneously. This energy release forms an electric arc upon breaking down the insulating oil film. The high temperature and energy of the arc cause severe damage to the bearing balls and raceways. Once the bearing balls or raceways are damaged by the arc, these damaged areas become weak points in the entire bearing oil film. During subsequent motor operation, the charge is more likely to break down the oil film at these weak points, forming an electric arc and further exacerbating the damage to the bearing. This vicious cycle leads to an increasing frequency of bearing arc damage, significantly accelerating bearing failure, severely impacting the motor's lifespan and reliability, and ultimately threatening the performance and safety of the entire power system of new energy vehicles.

[0004] Existing bearing protection solutions involve creating a voltage discharge channel outside the bearing and using a conductive ring to reduce voltage and protect the bearing from electro-corrosion, thereby extending its service life. Currently, the industry commonly uses cold pressing or riveting processes to connect and fix the conductive ring to related components.

[0005] However, in actual production, both crimping processes have significant drawbacks. During cold pressing or riveting, the conductive ring is subjected to strong compressive forces. Due to the limitations of the conductive ring's structure and material properties, these compressive forces cause deformation of the outer diameter. This outer diameter deformation significantly affects the production quality of the conductive ring and reduces the production yield. On the one hand, outer diameter deformation makes it difficult to guarantee the dimensional accuracy of the conductive ring, and conductive rings that do not meet design requirements cannot be used normally, resulting in waste of raw materials and increased production costs. On the other hand, the reduced production yield also limits the improvement of production efficiency.

[0006] Meanwhile, the deformation of the conductive ring's outer diameter caused by cold pressing or riveting processes is often uneven or disordered. This uneven or disordered outer diameter deformation can cause significant difficulties for subsequent on-site installation. In actual installation, due to the inconsistency in the outer diameter of the conductive ring, it may be impossible to install the conductive ring smoothly into the designated position, or the fit clearance between the conductive ring and adjacent components may not meet the requirements, leading to press-fit failure. Press-fit failure not only causes the equipment to malfunction but may also require disassembly and rework, further increasing costs. Summary of the Invention

[0007] In view of this, the embodiments of this specification provide a stable conductive ring and a tram drive system. By setting an elastic body, when the cover ring and the base ring are connected, the elastic body is compressed and deformed, so that the elastic body abuts against the conductive component, thereby ensuring that the first end of the conductive component is tightly pressed and fixed in the groove, ensuring the fixing effect of the conductive component. Compared with the traditional cold pressing or riveting production process, it can improve the problem of outer diameter deformation of the finished conductive ring, increase the finished product qualification rate, and reduce the production process control cost.

[0008] This specification provides the following technical solution through its embodiments: a stable conductive ring, comprising a cover ring, a base ring, and a plurality of conductive components, wherein the cover ring and the base ring cooperate with each other, the first ends of the plurality of conductive components are all installed between the cover ring and the base ring, and the second ends of the conductive components extend to the inner side of the cover ring and / or the base ring.

[0009] The base ring and / or the cover ring are provided with grooves for mounting the conductive element, and the first end of the conductive element is at least partially embedded in the groove. The conductive ring also includes an elastic body, and the elastic body is at least partially embedded in the groove.

[0010] When the cover ring and the base ring are connected, the cover ring and / or the base ring compress the elastic body to deform, so that the elastic body abuts against the conductive element, thereby fixing the first end of the conductive element in the groove.

[0011] Preferably, multiple elastomers are provided, and there is a one-to-one correspondence between the multiple elastomers and the multiple conductive elements.

[0012] Preferably, the elastomer is an oil-resistant and heat-resistant elastic rubber.

[0013] Preferably, the cover ring and the base ring are connected by a connector, and under the action of the connector, the cover ring and / or the base ring compress the elastic body to deform.

[0014] Preferably, the connector is a bolt or screw, the cover plate has a through hole, the base ring has a threaded groove, and the bolt portion passes through the through hole and engages with the threaded groove.

[0015] Preferably, the connector is a locking post, the first end of which is connected to the cover ring or the base ring, and the second end of which is engaged with the cover ring or the base ring.

[0016] Preferably, the locking post is disposed on the end face of the cover ring near the base ring, and the base ring is provided with a locking groove that cooperates with the locking post. When the cover ring and the base ring are connected, the locking post is engaged with the locking groove.

[0017] Preferably, the locking post is disposed on the end face of the base ring near the cover ring, and the cover ring is provided with a locking groove that cooperates with the locking post. When the cover ring and the base ring are connected, the locking post is engaged with the locking groove.

[0018] Preferably, multiple grooves are provided, and each of the multiple grooves corresponds one-to-one with a multiple of the conductive components, and all of the multiple grooves are formed on the base ring.

[0019] An electric vehicle drive system includes a conductive ring as described in any of the preceding claims, the conductive ring being disposed in the electric drive and arranged coaxially with the motor spindle or gearbox spindle.

[0020] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:

[0021] By creating grooves on the base ring and / or cover ring, the first end of the conductive element is installed in the groove, and the second end of the conductive element extends to the inner side of the cover ring and / or base ring. By providing an elastic body, when the cover ring and base ring are connected, the elastic body is compressed and deformed, so that the elastic body abuts against the conductive element, thereby ensuring that the first end of the conductive element is tightly pressed and fixed in the groove, ensuring the fixing effect of the conductive element. 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 an exploded view of the robust conductive ring provided in this application;

[0024] Figure 2 This is a front view of the robust conductive ring provided in this application;

[0025] Figure 3 This is a rear view of the sturdy conductive ring provided in this application.

[0026] In the figure, 1 is the cover ring; 2 is the base ring; 3 is the groove; 4 is the conductive component; 401 is the fiber fixator; 402 is the conductive fiber; 5 is the elastomer; and 6 is the connector. Detailed Implementation

[0027] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Furthermore, 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 the aspects described can be practiced without these specific details.

[0032] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0033] Currently, the existing conductive ring manufacturing technology solutions in the industry generally adopt cold pressing or riveting processes to connect and fix the conductive ring to related components.

[0034] However, in actual production, both crimping processes have significant drawbacks. During cold pressing or riveting, the conductive ring is subjected to strong compressive forces. Due to the limitations of the conductive ring's structure and material properties, these compressive forces cause deformation of the outer diameter. This outer diameter deformation significantly affects the production quality of the conductive ring and reduces the production yield. On the one hand, outer diameter deformation makes it difficult to guarantee the dimensional accuracy of the conductive ring, and conductive rings that do not meet design requirements cannot be used normally, resulting in waste of raw materials and increased production costs. On the other hand, the reduced production yield also limits the improvement of production efficiency.

[0035] Meanwhile, the deformation of the conductive ring's outer diameter caused by cold pressing or riveting processes is often uneven or disordered. This uneven or disordered outer diameter deformation can cause significant difficulties for subsequent on-site installation. In actual installation, due to the inconsistency in the outer diameter of the conductive ring, it may be impossible to install the conductive ring smoothly into the designated position, or the fit clearance between the conductive ring and adjacent components may not meet the requirements, leading to press-fit failure. Press-fit failure not only causes the equipment to malfunction but may also require disassembly and rework, further increasing costs.

[0036] like Figures 1-3 As shown, a stable conductive ring includes a cover ring 1, a base ring 2, and a plurality of conductive elements 4. The cover ring 1 and the base ring 2 cooperate with each other. The first ends of the plurality of conductive elements 4 are all installed between the cover ring 1 and the base ring 2, and the second ends of the conductive elements 4 extend to the inner side of the cover ring 1 and / or the base ring 2.

[0037] The base ring 2 and / or the cover ring 1 are provided with grooves 3 for installing the conductive element 4. The first end of the conductive element 4 is at least partially embedded in the groove 3. The conductive ring also includes an elastic body 5, which is at least partially embedded in the groove 3.

[0038] When the cover ring 1 and the base ring 2 are connected, the cover ring 1 and / or the base ring 2 compress the elastic body 5 to deform, so that the elastic body 5 abuts against the conductive element 4, thereby fixing the first end of the conductive element 4 in the groove 3.

[0039] Multiple conductive elements 4 have their first ends installed between the cover ring 1 and the base ring 2. The second ends of these conductive elements 4 extend to the inner side of the cover ring 1 and / or the base ring 2 to contact an external component (motor shaft). The base ring 2 and / or the cover ring 1 are designed with grooves 3 for mounting the conductive elements 4. The shape of the grooves 3 is designed to ensure that the conductive elements 4 can be stably and accurately embedded within them. An elastomer 5 is at least partially embedded within the grooves 3, contacting the first end of the conductive element 4. When the cover ring 1 and the base ring 2 are engaged, the elastomer 5 is compressed and deformed. This deformation not only enhances the fixation of the conductive elements 4 within the grooves 3 but also maintains the stability of the conductive elements 4 through the rebound force of the elastomer 5. Through the engagement of the cover ring 1 and the base ring 2 and the deformation of the elastomer 5, the first end of the conductive element 4 is firmly fixed within the grooves 3. This fixing method avoids the outer diameter deformation problems that may occur with traditional cold pressing or riveting processes.

[0040] It should be noted that in the above scheme, the conductive component 4 is firmly fixed in the groove 3 by the deformation of the elastic body 5, which effectively prevents the conductive component 4 from loosening or shifting during use, thereby improving the overall stability of the conductive ring. The method of fixing the conductive component 4 with the elastic body 5 avoids the complex cold pressing or riveting process, simplifies the installation process, and reduces the manufacturing cost.

[0041] It should also be noted that the conductive component 4 includes a conductive fiber 402 and a fiber retainer 401. The first end of the conductive fiber 402 is embedded in the fiber retainer 401, so that the conductive fiber 402 is fixed relative to the fiber retainer 401. The second end of the conductive fiber 402 passes through the cover ring 1 or the base ring 2 and contacts the motor shaft. The fiber retainer 401 is at least partially installed in the groove 3.

[0042] like Figure 1As shown, in some embodiments, multiple elastic bodies 5 are provided, with each elastic body 5 corresponding one-to-one with a plurality of conductive elements 4. The number of elastic bodies 5 matches the number of conductive elements 4, that is, multiple elastic bodies 5 correspond one-to-one with multiple conductive elements 4, and each conductive element 4 is surrounded or partially surrounded by an independent elastic body 5. When the cover ring 1 and the base ring 2 are connected, each elastic body 5 is compressed and deformed, thus tightly fitting onto the corresponding conductive element 4. Since there is a one-to-one correspondence between the elastic bodies 5 and the conductive elements 4, it can be ensured that the pressure distribution on the conductive elements 4 is more uniform. This helps to avoid damage or deformation of the conductive elements 4 caused by excessive local pressure. Each conductive element 4 is independently fixed by an elastic body 5, and this design enhances the stability of the conductive elements 4 within the groove 3. Even when the external environment changes (such as temperature fluctuations, vibrations, etc.), the conductive elements 4 can maintain a relatively stable position.

[0043] In some embodiments, the elastomer 5 is an oil- and temperature-resistant elastic rubber. This oil- and temperature-resistant elastic rubber ensures that the conductive ring maintains a stable fixing effect under various working conditions, avoiding fixing failure caused by oily substances or temperature changes. Furthermore, the oil- and temperature-resistant elastic rubber can adapt to different types of oily substances and temperature ranges, thus this conductive ring design has wider adaptability and can be applied to a variety of different working environments.

[0044] like Figures 1-3 As shown, in some embodiments, the cover ring 1 and the base ring 2 are connected by a connector 6. Under the action of the connector 6, the cover ring 1 and / or the base ring 2 compress the elastic body 5 to deform. An axial preload is applied through the connector 6, causing relative displacement between the cover ring 1 and the base ring 2, thereby compressing the elastic body 5 sandwiched between them. This further compresses the conductive element 4, ensuring the effective fixation of the conductive element 4.

[0045] like Figures 1-3 As shown, in some embodiments, the connector 6 is a bolt or screw, the cover plate has a through hole, and the base ring 2 has a threaded groove. The bolt's threaded portion passes through the through hole and engages with the threaded groove. This connection structure uses a bolt / screw as the connector 6, achieving a mechanical connection through the through hole of the cover plate and the threaded groove of the base ring 2, thus achieving highly reliable fixing.

[0046] like Figures 2-3As shown, in some embodiments, the connector 6 is a locking post. The first end of the locking post is connected to the cover ring 1 or the base ring 2, and the second end of the locking post is engaged with the cover ring 1 or the base ring 2. The locking post is fixedly connected to the cover ring 1 / base ring 2 through the first end (usually by welding or integral molding), and the second end is designed as an elastic claw structure, which uses the elastic deformation of plastic or metal to achieve quick engagement. During the engagement process, the barb structure (often trapezoidal in cross-section) of the second end of the locking post generates radial elastic deformation when compressed, and rebounds and locks after passing through the locking groove.

[0047] In some embodiments, the locking post is disposed on the end face of the cover ring 1 near the base ring 2, and the base ring 2 is provided with a locking groove that mates with the locking post. When the cover ring 1 and the base ring 2 are connected, the locking post engages with the locking groove. In other embodiments, the locking post is disposed on the end face of the base ring 2 near the cover ring 1, and the cover ring 1 is provided with a locking groove that mates with the locking post. When the cover ring 1 and the base ring 2 are connected, the locking post engages with the locking groove.

[0048] As needed, locking posts can be set on the cover ring 1 or the base ring 2, and locking slots can be set at the corresponding positions of the locking posts. The locking posts and locking slots can be engaged with each other to achieve a fixed connection between the cover ring 1 and the base ring 2.

[0049] like Figure 1 As shown, in some embodiments, multiple grooves 3 are provided, and each of the multiple grooves 3 corresponds one-to-one with a multiple of the conductive elements 4. All the multiple grooves 3 are formed on the base ring 2. By providing grooves 3 that correspond one-to-one with the multiple conductive elements 4, one conductive element 4 is installed in each groove 3. The grooves 3 can limit the corresponding conductive elements 4, preventing them from shifting during installation.

[0050] Please see Figures 1-3 Based on the same inventive concept, embodiments of this specification provide an electric vehicle drive system, including a conductive ring as described in any of the above claims, wherein the conductive ring is disposed in the electric drive and arranged coaxially with the motor spindle or gearbox spindle.

[0051] In practice, by employing the aforementioned conductive ring, when the cover ring 1 and the base ring 2 are connected, the elastic body 5 is compressed and deformed. This deformation not only enhances the fixing effect of the conductive component 4 within the groove 3, but also maintains the stability of the conductive component 4 through the rebound force of the elastic body 5. Through the connection of the cover ring 1 and the base ring 2, and the deformation of the elastic body 5, the first end of the conductive component 4 is firmly fixed within the groove 3. This fixing method avoids the outer diameter deformation problem that may occur with traditional cold pressing or riveting processes.

[0052] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the method embodiments described later are relatively simple in description since they correspond to the system, and relevant parts can be referred to the descriptions in the system embodiments.

[0053] 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 stable conductive ring, comprising a cover ring, a base ring, and a plurality of conductive elements, wherein the cover ring and the base ring cooperate with each other, and the first ends of the plurality of conductive elements are all installed between the cover ring and the base ring, and the second ends of the conductive elements extend to the inner side of the cover ring and / or the base ring, characterized in that, The base ring and / or the cover ring are provided with grooves for mounting the conductive element, and the first end of the conductive element is at least partially embedded in the groove. The conductive ring also includes an elastic body, and the elastic body is at least partially embedded in the groove. When the cover ring and the base ring are connected, the cover ring and / or the base ring compress the elastic body to deform, so that the elastic body abuts against the conductive element, thereby fixing the first end of the conductive element in the groove.

2. The stable conductive ring according to claim 1, characterized in that, The elastic body is provided in multiple ways, and there is a one-to-one correspondence between the multiple elastic bodies and the multiple conductive elements.

3. The stable conductive ring according to claim 2, characterized in that, The elastomer is an oil-resistant and heat-resistant elastic rubber.

4. The stable conductive ring according to claim 1, characterized in that, The cover ring and the base ring are connected by a connector, and under the action of the connector, the cover ring and / or the base ring compress the elastic body to deform.

5. The stable conductive ring according to claim 4, characterized in that, The connector is a bolt or screw, the cover plate has a through hole, the base ring has a threaded groove, and the bolt's shank passes through the through hole and engages with the threaded groove.

6. The stable conductive ring according to claim 4, characterized in that, The connector is a locking pin, the first end of which is connected to the cover ring or the base ring, and the second end of which is engaged with the cover ring or the base ring.

7. The stable conductive ring according to claim 6, characterized in that, The locking post is disposed on the end face of the cover ring near the base ring. The base ring is provided with a locking groove that cooperates with the locking post. When the cover ring and the base ring are connected, the locking post is engaged with the locking groove.

8. The stable conductive ring according to claim 6, characterized in that, The locking post is disposed on the end face of the base ring near the cover ring. The cover ring is provided with a locking groove that cooperates with the locking post. When the cover ring and the base ring are connected, the locking post is engaged with the locking groove.

9. The stable conductive ring according to any one of claims 1-8, characterized in that, The grooves are provided in multiple ways, and each groove corresponds to one of the conductive components. All the grooves are formed on the base ring.

10. A tram drive system, characterized in that, Includes the conductive ring as described in any one of claims 1-9, wherein the conductive ring is disposed in an electric drive and arranged coaxially with the motor spindle or gearbox spindle.

Images