Transmission device, stirring device and battery production apparatus

Abstract

Disclosed are a transmission device, a stirring device and a battery production apparatus. The transmission device comprises a rotating shaft (110), a support assembly (120) and an oil baffle assembly (130), wherein the rotating shaft (110) is configured to be connected to a driving device (200) and is driven by the driving device (200) to rotate; the support assembly (120) is movably connected to the rotating shaft (110) and allows the rotating shaft (110) to pass through same; the oil baffle assembly (130) comprises an oil thrower disc (131), the oil thrower disc (131) being sleeved on the surface of the rotating shaft (110), and the oil thrower disc (131) being located on the side of the support assembly (120) that is close to the driving device (200) and being spaced apart from the support assembly (120); and an accommodating groove (125) is formed in the surface of the support assembly (120) that faces the oil thrower disc (131), and the accommodating groove (125) is configured to receive lubricating grease thrown out by the oil thrower disc (131). The transmission device can reduce the risk of a slurry being contaminated by the lubricating grease.

Description

Transmission devices, stirring devices and battery production equipment

[0001] Cross-references

[0002] This application refers to Chinese patent application No. 202323254743.5 filed on November 30, 2023, entitled “Transmission device, stirring device and battery production equipment”, which is incorporated into this application in its entirety by reference. Technical Field

[0003] The present application relates to the field of mechanical seals, and in particular to a transmission device, a stirring device and battery production equipment. Background Art

[0004] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0005] During battery production, the battery slurry is stirred and mixed before being applied to the surface of the current collector. During this stirring process, there is a risk of lubricating grease leaking from the stirring device. This grease could fall into the battery slurry, contaminating it and affecting battery quality.

[0006] Summary of the Invention

[0007] The present application aims to solve at least one of the technical problems in the background art. To this end, one object of the present application is to provide a transmission device, a stirring device and a battery production device to reduce the risk of slurry contamination.

[0008] An embodiment of a first aspect of the present application provides a transmission device comprising a rotating shaft, a support assembly, and an oil shielding assembly. The rotating shaft is connected to a drive device and rotates when driven by the drive device; the support assembly is movably connected to the rotating shaft and allows the rotating shaft to pass through; the oil shielding assembly includes an oil slinger pan, which is sleeved on the surface of the rotating shaft and is located on a side of the support assembly close to the drive device and spaced apart from the support assembly. The support assembly has a receiving groove formed on its surface facing the oil slinger pan, which is used to receive lubricating grease slinged by the oil slinger pan.

[0009] In the technical solution of the embodiment of the present application, the provision of an oil-slinging pan and a receiving groove can prevent the lubricating grease leaked along the rotating shaft from continuing to leak downward under the action of gravity, thereby contaminating the slurry and improving the quality of the slurry. Moreover, the receiving groove is directly provided on the side surface of the support assembly facing the oil-slinging pan, which can simplify the internal structure of the transmission device, reduce the axial space occupied, and facilitate the layout and installation of the transmission device.

[0010] In some embodiments, the support assembly includes a fixed seat, a bearing, and a first end cap. The bearing is located within the fixed seat and sleeved onto the surface of the rotating shaft. The first end cap is fixedly connected to the first surface of the fixed seat facing the oil-slinging pan and axially limits the bearing. The receiving groove is located on the first surface of the fixed seat and is connected to a drain port of the fixed seat. The presence of both the receiving groove and the drain port on the fixed seat facilitates the rapid drainage of lubricating grease, saves space in the transmission device along the axial direction of the rotating shaft, and makes the transmission device more compact, facilitating miniaturization and installation.

[0011] In some embodiments, the outer side of the first end cap facing the oil-slinging pan includes an inclined guide surface, wherein the vertical height of the guide surface from the first surface of the fixing seat gradually decreases in a radially outward direction from the rotating shaft. The provision of the guide surface can guide the lubricating grease into the receiving groove for easy discharge, and can also prevent excess lubricating grease from overflowing and dripping along the surface of the rotating shaft, thereby improving the oil blocking effect.

[0012] In some embodiments, the support assembly further includes a second end cap and a sealing assembly. The second end cap is fixedly connected to a second surface of the mounting base, distal from the oil slinger pan. The sealing assembly is positioned between the second end cap and the rotating shaft to seal the gap therebetween. The provision of the sealing assembly prevents leakage of lubricating grease within the bearing, thereby reducing the risk of slurry contamination.

[0013] In some embodiments, the sealing assembly includes a first seal and a second seal disposed in sequence along the axial direction of the rotating shaft, wherein the first seal and the second seal are different oil seal types. Providing seals of different oil seal types can improve sealing reliability and reduce the risk of sealing structure failure.

[0014] In some embodiments, the first seal is located on the side of the second seal closest to the bearing. The first seal is a single-lip skeleton oil seal, and the second seal is a double-lip skeleton oil seal. This can improve sealing performance, prevent lubricant leakage and external contaminants from entering, and also reduce costs.

[0015] In some embodiments, the oil deflector assembly further includes a plurality of agitating rods spaced apart circumferentially along the rotating shaft and rotating therewith, with the plurality of agitating rods being located on a side of the oil slinger plate proximate the drive mechanism. The rotation of the agitating rods can break up any large chunks of leaking grease, thereby reducing the impact of such chunks on the oil slinger plate. Furthermore, the oil slinger plate can evenly distribute the leaked grease, preventing accumulation of grease that would otherwise increase sealing pressure and thereby improving overall sealing performance.

[0016] In some embodiments, the oil-slinging pan includes a mounting barrel and an annular pan body. The mounting barrel is fixedly connected to the rotating shaft, and the pan body is connected to the outer side of the mounting barrel. A plurality of stirring rods are fixedly connected to the mounting barrel. Fixedly connecting the stirring rods to the mounting barrel of the oil-slinging pan can reduce the number of parts on the rotating shaft, shorten the installation time, and simplify the structure of the transmission device.

[0017] In some embodiments, the transmission device further includes an oil collection box located on a side of the support assembly away from the oil slinger pan. The oil collection box includes an oil collection groove opening toward the support assembly. The oil collection box can collect grease leaking from the support assembly, preventing it from entering the stirred slurry below and contaminating it, thereby improving the sealing performance of the transmission device.

[0018] In some embodiments, the oil receiving box is fixedly connected to the support assembly, so as to more reliably receive leaked lubricating grease and improve the reliability of the transmission device.

[0019] In some embodiments, the oil receiving box is fixedly connected to the rotating shaft and includes an inner sidewall and an outer sidewall forming an oil receiving groove, and a bottom wall connecting the inner sidewall and the outer sidewall. The angle between the outer sidewall and the bottom wall is acute. Setting the angle between the outer sidewall and the bottom wall as acute can prevent the lubricant from escaping due to centrifugal force, thereby reducing the risk of slurry contamination.

[0020] In some embodiments, the angle α between the outer wall and the bottom wall satisfies the following: 45°≤α<90°. Limiting the angle α between the two to 45°≤α<90° can better balance the opening size and the discharge of lubricating grease, thereby reducing the risk of slurry contamination.

[0021] In some embodiments, the angle α between the outer wall and the bottom wall satisfies: 60°≤α≤80°. Limiting the angle α to 60°≤α<80° can achieve a better grease blocking effect and reduce the risk of slurry contamination.

[0022] An embodiment of the second aspect of the present application provides a stirring device, which includes: a driving device, a transmission device and a stirring wheel; one end of the rotating shaft of the transmission device is transmission-connected to the driving device, and the stirring wheel is transmission-connected to the other end of the rotating shaft of the transmission device.

[0023] An embodiment of the third aspect of the present application provides a battery production device, including a stirring device.

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the drawings without paying creative work.

[0026] FIG1 is a schematic structural diagram of a stirring device according to some embodiments of the present application;

[0027] FIG2 is a schematic structural diagram of a transmission device according to some embodiments of the present application;

[0028] FIG3 is a schematic structural diagram of a component connected to a rotating shaft in a transmission device according to some embodiments of the present application;

[0029] FIG4 is a schematic structural diagram of an oil retaining assembly according to some embodiments of the present application;

[0030] FIG5 is a top view along the direction A in FIG4 ;

[0031] FIG6 is a schematic structural diagram of an oil receiving box according to some embodiments of the present application.

[0032] Explanation of the accompanying drawings: stirring device 1000; transmission device 100, driving device 200, stirring wheel 300; rotating shaft 110, supporting assembly 120, oil baffle assembly 130, oil collecting box 140, fixed seat 121, first surface 1211, second surface 1212, bearing 122, first end cover 123, guide surface 1231, second end cover 124, accommodating groove 125, drain outlet 126, sealing assembly 127, first seal 1271, second seal 1272, oil-spinning plate 131, mounting cylinder 1311, plate body 1312, stirring rod 132, oil collecting groove 141, inner wall 142, outer wall 143, bottom wall 144, reducer 210, driving motor 220. DETAILED DESCRIPTION

[0033] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0035] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0036] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0038] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0039] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0040] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0041] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0042] During the battery production process, the battery slurry usually needs to be stirred evenly before being transported to the coating machine for coating. In the related art, the stirring wheel is connected to the driving device in a transmission manner so as to stir the battery slurry under the drive of the driving device. The output shaft of the driving device can be connected to the stirring wheel through the transmission device. The rotational movement of the output shaft of the driving device will cause wear between the output shaft and the sealing device, which may cause the lubricating oil or grease of the driving device to leak through the sealing structure. The leaked grease will accelerate along the output shaft to penetrate into the battery slurry, causing slurry contamination, thereby affecting the quality of the battery.

[0043] To address the above-mentioned problems, embodiments of the present application provide a transmission device, a stirring device, and a battery production device for slurry stirring, wherein the transmission device is configured to be connected to a drive device and a stirring wheel so that the stirring wheel rotates under the drive of the drive device to stir the slurry. The transmission device includes a rotating shaft, a support assembly, and an oil shield assembly. The rotating shaft is configured to be connected to the drive device and rotate under the drive of the drive device; the support assembly is movably connected to the rotating shaft and allows the rotating shaft to pass through; the oil shield assembly includes an oil slinger, which is sleeved on the surface of the rotating shaft. The oil slinger is located on a side of the support assembly close to the drive device and is spaced apart from the support assembly. A receiving groove is formed on the surface of the support assembly facing the oil slinger, and the receiving groove is configured to receive lubricating oil slinged by the oil slinger. By providing the oil shield assembly on the rotating shaft of the transmission device, lubricating oil (lubricating oil and / or grease) leaking from the output shaft of the drive device can be blocked. At the same time, providing a receiving groove on the support assembly to receive the slinged oil not only receives the lubricating oil, reducing the risk of contaminating the battery slurry, but also simplifies the internal structure of the transmission device and reduces the size of the transmission device.

[0044] The transmission device, stirring device, and battery production equipment disclosed in the embodiments of the present application can be used in battery production, for example, to stir battery slurry or other slurries that need to be stirred. The transmission device and stirring device can also be used to stir other slurries.

[0045] For the convenience of description, the following embodiments are described by taking a stirring device according to an embodiment of the present application as an example.

[0046] Please refer to Figures 1 to 3. Figure 1 is a structural schematic diagram of a stirring device provided in some embodiments of the present application, Figure 2 is a structural schematic diagram of a transmission device provided in some embodiments of the present application, and Figure 3 is a structural schematic diagram of a component connected to a rotating shaft in a transmission device provided in some embodiments of the present application.

[0047] The stirring device 1000 includes a transmission device 100, a driving device 200 and a stirring wheel 300. The two ends of the transmission device 100 are respectively connected to the driving device 200 and the stirring wheel 300.

[0048] The embodiment of the present application provides a transmission device 100, as shown in Figures 1 and 2, which includes a rotating shaft 110, a support assembly 120, and an oil shielding assembly 130. The rotating shaft 110 is used to be connected to the driving device 200 and rotate under the drive of the driving device 200; the support assembly 120 is movably connected to the rotating shaft 110 and allows the rotating shaft 110 to pass through; the oil shielding assembly 130 includes an oil-slinging plate 131, which is sleeved on the surface of the rotating shaft 110, the oil-slinging plate 131 is located on a side of the support assembly 120 close to the driving device 200 and is spaced apart from the support assembly 120; wherein, a receiving groove 125 is formed on the surface of the support assembly 120 facing the oil-slinging plate 131, and the receiving groove 125 is used to receive the lubricating oil thrown out by the oil-slinging plate 131.

[0049] The two ends of the rotating shaft 110 are respectively connected to the driving device 200 and the stirring wheel 300, so that the rotational power output by the driving device 200 is transmitted to the stirring wheel 300, so that the stirring wheel 300 rotates to achieve stirring and conveying of the slurry. In some embodiments, the transmission device 100 is a vertical transmission device, and the driving device 200 is connected to the upper end of the rotating shaft 110 by transmission, for example, by a clutch connection or a key connection. The stirring wheel 300 is connected to the lower end of the rotating shaft 110 by transmission, for example, by a profile connection, a threaded connection or a fixed connection by a set screw. In some embodiments, the rotating shaft 110 can be reused as the output shaft of the driving device 200, or the rotating shaft 110 can be obtained by reusing the output shaft of the driving device 200.

[0050] The support assembly 120 is used to support the rotating shaft 110. The support assembly 120 is movably connected to the rotating shaft 110, thereby supporting the rotating shaft 110 without affecting its rotation. In some embodiments, the support assembly 120 may include a rolling bearing, the inner ring of which is fixedly connected to the outer surface of the rotating shaft 110. The support assembly 120 may also be fixedly connected to the mounting plate 101, so that the transmission device 100 can be arranged on the mounting plate 101. In some embodiments, the mounting plate 101 may be the cover plate on the top of the mixing tank containing the slurry.

[0051] The oil-slinging plate 131 can be an annular structure, such as an annular disc, that is sleeved on the surface of the rotating shaft 110. The oil-slinging plate 131 can be fixedly connected to the rotating shaft 110 and rotate with the rotating shaft 110. In some examples, the oil-slinging plate 131 and the rotating shaft 110 can be connected by a profile or fixedly connected by a fastener, such as a set screw. The oil-slinging plate 131 is located above the support assembly 120 near the drive device 200 and is spaced apart from the support assembly 120. This can block the lubricating grease leaking from the drive device 200 above, and as the rotating shaft 110 rotates, the lubricating grease is thrown to the surroundings, preventing the lubricating grease from entering the gap between the rotating shaft 110 and the support assembly 120 and seeping into the slurry.

[0052] The receiving groove 125 is located on the side surface of the support assembly 120 facing the oil-slinging pan 131. The receiving groove 125 can be a groove formed on the surface of a single component or a concave area formed by multiple components. The receiving groove 125 has an upward opening so as to receive the lubricating grease thrown out by the oil-slinging pan 131.

[0053] By providing an oil-slinging pan 131 on the rotating shaft 110 and providing a receiving groove 125 on the side of the support assembly 120 facing the oil-slinging pan 131 to receive the lubricating grease spun off the oil-slinging pan 131, the lubricating grease leaking along the rotating shaft 110 can be prevented from continuing to leak downward under the action of gravity, thereby improving the quality of the slurry. In addition, the direct provision of the receiving groove 125 on the side of the support assembly 120 facing the oil-slinging pan 131 simplifies the internal structure of the transmission device 100, reduces the axial space occupied, and facilitates the layout and installation of the transmission device 100.

[0054] According to some embodiments of the present application, as shown in Figure 2, the support assembly 120 includes a fixed seat 121, a bearing 122 and a first end cover 123, the fixed seat 121 includes a through hole allowing the rotating shaft 110 to pass through and a drain outlet 126, the bearing 122 is located in the through hole of the fixed seat 121 and is sleeved on the surface of the rotating shaft 110, the first end cover 123 is fixedly connected to the first surface 1211 of the fixed seat 121 facing the oil-spinning plate 131 and limits the bearing 122 along the axial direction; wherein, the accommodating groove 125 is located on the first surface 1211 of the fixed seat 121, and the accommodating groove 125 is connected to the drain outlet 126.

[0055] A through-hole is formed in the center of the fixed seat 121, allowing the rotating shaft 110 to pass through. The bearing 122 is located between the inner wall of the through-hole and the rotating shaft 110. In some embodiments, the bearing 122 may be a rolling bearing, such as a deep groove ball bearing, a spherical roller bearing, or a cylindrical roller bearing. The inner ring of the bearing 122 is fixedly mounted on the surface of the rotating shaft 110 and rotates with the rotating shaft 110, while the outer ring abuts against the inner surface of the fixed seat 121.

[0056] The fixing seat 121 includes a first surface 1211 and a second surface 1212 facing each other. The first surface 1211 is the upper surface facing the oil-slinging pan 131. The first end cover 123 can be fixedly connected to the first surface 1211 via fasteners. The first end cover 123 includes a positioning portion protruding along the axial direction of the rotating shaft 110. This positioning portion is configured to abut the outer ring of the bearing 122 to limit the position of the bearing 122.

[0057] The receiving groove 125 can be provided on the first surface 1211 of the fixing base 121. In some embodiments, as shown in FIG2 , the receiving groove 125 can be formed by the first surface 1211 and the surface of the first end cap 123. In other embodiments, the receiving groove 125 can also be a groove directly provided on the first surface 1211.

[0058] The drain outlet 126 may be located on a side surface between the first surface 1211 and the second surface 1212 of the fixing seat 121 . The receiving groove 125 is in communication with the drain outlet 126 , so that the received lubricating grease can be discharged through the drain outlet 126 .

[0059] The bearing 122 provides radial support for the rotating shaft 110, improving the operational stability of the transmission device 100. The receiving groove 125 and the drain outlet 126 are both disposed on the fixed seat 121, allowing for communication between the two by directly machining a connecting hole within the fixed seat 121. This facilitates the rapid discharge of lubricating grease received by the receiving groove 125. Furthermore, since the entire structure is disposed within the fixed seat 121, space can be saved along the axial direction of the rotating shaft 110 within the transmission device 100, making the transmission device 100 more compact and facilitating miniaturization and installation.

[0060] According to some embodiments of the present application, as shown in Figure 3, the outer side surface of the first end cover 123 facing the oil-slinging pan 131 includes an inclined guide surface 1231, and the height of the guide surface 1231 from the connecting surface between the first end cover 123 and the fixed seat 121 gradually decreases along the radial outward direction of the rotating shaft 110.

[0061] The first end cap 123 includes a central through-hole, and the guide surface 1231 can be located at one end of the first end cap 123 near the through-hole to avoid the installation area between the first end cap 123 and the fixed seat 121. Along the radial outward direction of the rotating shaft 110, the guide surface 1231 is a gradually decreasing inclined surface. As shown in FIG3 , the connection surface between the first end cap 123 and the fixed seat 121 is a plane perpendicular to the axial direction of the rotating shaft 110. The height of the guide surface 1231 from the end closest to the rotating shaft 110 to the connection surface is H1, and the height of the guide surface 1231 from the end farther from the rotating shaft 110 to the connection surface is H2, where H1>H2.

[0062] In some embodiments, the guide surface 1231 can be a smooth and flat inclined surface, such as a flat inclined surface or an arc-shaped surface, or it can be an uneven surface with an overall gradually decreasing height, such as a wavy or serrated surface. Such a surface can provide greater surface resistance, thereby inhibiting the lubricating grease from overflowing upward.

[0063] By providing the guide surface 1231 , the lubricating grease can be guided to flow into the receiving groove 125 for easy discharge, and the excess lubricating grease can be prevented from overflowing and continuing to drip along the surface of the rotating shaft 110 , thereby improving the oil blocking effect.

[0064] According to some embodiments of the present application, the support assembly 120 also includes a second end cover 124 and a sealing assembly 127. The second end cover 124 is fixedly connected to the second surface 1212 of the fixing seat 121 away from the oil-slinging plate 131. The sealing assembly 127 is located between the second end cover 124 and the rotating shaft 110 to seal the gap between the second end cover 124 and the rotating shaft 110.

[0065] A through-hole is defined in the center of second end cap 124, through which rotating shaft 110 passes. Second end cap 124 can be fixedly connected to second surface 1212 of mounting base 121 via fasteners. A sealing assembly 127 is positioned within the through-hole of second end cap 124 to seal the gap between second end cap 124 and the surface of rotating shaft 110. Sealing assembly 127 can include one or more sealing elements, which can be any dynamic sealing element.

[0066] To reduce wear and tear on bearing 122 and extend its service life, lubricating oil or grease can be injected into the bearing 122 to reduce wear caused by friction during operation. This grease used to lubricate bearing 122 can leak downward under the influence of gravity, posing a risk of contaminating the slurry. Sealing can prevent leakage of grease within bearing 122, reducing the risk of slurry contamination.

[0067] According to some embodiments of the present application, the sealing assembly 127 includes a first seal 1271 and a second seal 1272 sequentially arranged along the axial direction of the rotating shaft 110 , and the first seal 1271 and the second seal 1272 are different oil seal types.

[0068] The sealing assembly 127 may include two or more seals, which may be lip seals, V-ring seals, cartridge seals, or other oil seal types. A first seal 1271 and a second seal 1272 may be arranged side by side along the surface of the rotating shaft 110 .

[0069] The reliability of the seal can be improved by providing the first seal 1271 and the second seal 1272 of different oil seal types. Different types of seals have different sealing structures, which can reduce the risk of failure of the sealing structure.

[0070] According to some embodiments of the present application, the first seal 1271 is located on a side of the second seal 1272 close to the bearing 122 , the first seal 1271 is a single-lip skeleton oil seal, and the second seal 1272 is a double-lip skeleton oil seal.

[0071] A single-lip skeleton oil seal has a single sealing lip, mounted on the rotating shaft 110, to prevent grease leakage. A double-lip skeleton oil seal is more complex than a single-lip seal, having two sealing lips. In some embodiments, the two sealing lips of a double-lip skeleton oil seal face in different directions. This structure provides better sealing performance, preventing grease leakage while also blocking the ingress of external contaminants.

[0072] By setting the first seal 1271 close to the bearing 122 as a single-lip skeleton oil seal and the second seal 1272 away from the bearing 122 as a double-lip skeleton oil seal, on the one hand, the sealing performance can be improved to prevent the leakage of lubricating grease and the entry of external pollutants, and on the other hand, the cost can be reduced.

[0073] Please refer to Figures 4 and 5. Figure 4 is a schematic structural diagram of the oil baffle assembly of some embodiments of the present application, and Figure 5 is a top view along direction A in Figure 4.

[0074] According to some embodiments of the present application, as shown in Figures 4 and 5, the oil baffle assembly 130 also includes a plurality of stirring rods 132, which are arranged at intervals along the circumference of the rotating shaft 110 and rotate with the rotating shaft 110, and the plurality of stirring rods 132 are located on the side of the oil-spinning plate 131 close to the drive device 200.

[0075] The stirring rod 132 can be directly or indirectly fixedly connected to the rotating shaft 110, and the stirring rod 132 can be evenly arranged along the circumference of the rotating shaft 110. In some embodiments, multiple stirring rods 132 can be located in the same plane perpendicular to the axial direction of the rotating shaft 110. In another embodiment, multiple stirring rods 132 can be located in multiple planes perpendicular to the axial direction of the rotating shaft 110. The stirring rod 132 can be a rigid rod, for example, the material can be metal, ceramic, etc., or it can be a flexible rod, for example, the material can be plastic, rubber, etc. The stirring rod 132 can be a straight rod, or it can be a curved rod, for example, an arc rod.

[0076] The accumulated lubricating grease is heavier and has a greater risk of leakage. The multiple stirring rods 132 are arranged to break up the leaked large pieces of lubricating grease as the rotating shaft 110 rotates. On the one hand, this can reduce the impact force of the large pieces of lubricating grease on the oil-swinging plate 131. On the other hand, it is also beneficial for the oil-swinging plate 131 to evenly spread the leaked lubricating grease to the surroundings, preventing the lubricating grease from accumulating and causing an increase in sealing pressure, thereby improving the overall sealing performance.

[0077] According to some embodiments of the present application, the oil-spinning plate 131 includes a mounting cylinder 1311 and an annular plate body 1312, the mounting cylinder 1311 is fixedly connected to the rotating shaft 110, and the plate body 1312 is connected to the outer side surface of the mounting cylinder 1311; wherein, the stirring rod 132 is fixedly connected to the mounting cylinder 1311.

[0078] The stirring rod 132 can be fixedly connected to the outer surface of the mounting cylinder 1311 by welding or threading, or can be integrally formed with the oil-slinging pan 131. The mounting cylinder 1311 has a mounting hole at its center, through which the rotating shaft 110 passes. The mounting cylinder 1311 can be fixedly connected to the rotating shaft 110 by fasteners or by a profile connection.

[0079] By fixing the stirring rod 132 to the mounting tube 1311 of the oil-slinging pan 131 , the number of parts on the rotating shaft 110 can be reduced, the time required for shaft installation can be reduced, and the structure of the transmission device 100 can be simplified.

[0080] According to some embodiments of the present application, as shown in Figures 2 and 3, the transmission device 100 also includes an oil receiving box 140, which is located on a side of the support assembly 120 away from the oil-spinning plate 131. The oil receiving box 140 includes an oil receiving groove 141 with an opening toward the support assembly.

[0081] The oil collecting box 140 is installed below the support assembly 120. An oil collecting groove 141 is provided on the side of the oil collecting box 140 facing the support assembly 120. The opening of the oil collecting groove 141 faces upward and can be used to receive lubricating grease leaked from the support assembly 120, such as lubricating grease for lubricating the bearing 122.

[0082] The oil receiving box 140 can receive the lubricating grease leaked from the support assembly 120 , preventing the lubricating oil from entering the stirring slurry below and causing contamination to the slurry, thereby improving the sealing effect of the transmission device 100 .

[0083] According to some embodiments of the present application, the oil collecting box 140 is fixedly connected to the supporting assembly 120 .

[0084] The oil receiving box 140 can be fixedly connected to the fixing seat 121 or the second end cover 124 of the support assembly 120 through a connecting structure, and the connecting structure can be a snap connection, welding or a fastener.

[0085] The fixed connection between the oil receiving box 140 and the support assembly 120 can keep the oil receiving box 140 stationary, thereby more reliably receiving the leaked lubricating grease and improving the reliability of the transmission device 100.

[0086] Please refer to FIG. 6 , which is a schematic structural diagram of an oil receiving box according to some embodiments of the present application.

[0087] According to some embodiments of the present application, the oil collecting box 140 is fixedly connected to the rotating shaft 110, and the oil collecting box 140 includes an inner wall 142 and an outer wall 143 forming an oil collecting groove 141, and a bottom wall 144 connecting the inner wall 142 and the outer wall 143; the angle between the outer wall 143 and the bottom wall 144 is an acute angle.

[0088] The oil collecting box 140 can be removably fixedly connected to the rotating shaft 110, for example, by fasteners, allowing for easy removal for cleaning. The inner sidewall 142 can be a generally upwardly extending annular wall, while the outer sidewall 143 extends in an obliquely upward direction toward the rotating shaft 110. The bottom wall 144 is located in a plane perpendicular to the axial direction of the rotating shaft 110. The bottom wall 144 connects the bottoms of the inner sidewall 142 and the outer sidewall 143 to form an oil collecting groove 141. The opening of the oil collecting groove 141 faces upward toward the sealing assembly 127 to receive lubricating grease leaking from the sealing assembly 127. The outer sidewall 143 and the bottom wall 144 form an acute angle of less than 90°.

[0089] In some embodiments, the oil receiving box 140 may be an annular component, and the oil receiving groove 141 formed therein may be an annular groove, which may correspond to the annular sealing assembly 127 .

[0090] The oil receiving box 140 is fixedly connected to the rotating shaft 110 so that it rotates with the rotating shaft 110. This generates a centrifugal force on the lubricating grease received therein, which may cause the lubricating grease to overflow around the outer wall 143. Setting the angle between the outer wall 143 and the bottom wall 144 to an acute angle prevents the lubricating grease from overflowing under the action of centrifugal force, thereby reducing the risk of slurry contamination.

[0091] According to some embodiments of the present application, as shown in FIG6 , the angle α between the outer wall 143 and the bottom wall 144 satisfies: 45°≤α<90°.

[0092] If the angle between outer wall 143 and bottom wall 144 is too small, the opening of oil receiving box 140 will be too small, which will also limit the storage space of oil receiving groove 141, making it difficult to receive lubricating grease leaking from above. Limiting the angle α between the two to 45°≤α<90° can effectively balance the opening size and the discharge of lubricating grease, reducing the risk of slurry contamination.

[0093] According to some embodiments of the present application, as shown in FIG6 , the angle α between the outer wall 143 and the bottom wall 144 satisfies: 60°≤α≤80°.

[0094] By comprehensively considering the volume of the oil collecting groove 141, the rotation speed of the rotating shaft 110, and the distance between the oil collecting box 140 and the sealing assembly 127, the angle α between the outer wall 143 and the bottom wall 144 is limited to the range of 60°≤α<80°, which can obtain a better lubricating grease blocking effect and reduce the risk of slurry contamination.

[0095] An embodiment of the second aspect of the present application provides a stirring device 1000. As shown in Figure 1, the stirring device 1000 includes a driving device 200, a transmission device 100 and a stirring wheel 300; one end of the rotating shaft 110 of the transmission device 100 is transmission-connected to the driving device 200, and the stirring wheel 300 is transmission-connected to the other end of the rotating shaft 110 of the transmission device 100.

[0096] The driving device 200 may include a driving motor 220 and a reducer 210 that is transmission-connected to the driving motor 220. The rotating shaft 110 may be transmission-connected to the output shaft of the reducer 210, for example, via a clutch connection or a key connection; or it may directly serve as the output shaft of the reducer 210 and be connected to the transmission mechanism inside the reducer 210. The stirring wheel 300 may be directly fixedly connected to the surface of the rotating shaft 110, for example, via a fastener connection, a profile connection, or a threaded connection; or it may be fixed to an additional stirring shaft and then transmission-connected to the rotating shaft 110 via the stirring shaft. The stirring wheel 300 may have any impeller structure, and this application does not impose any restrictions on this.

[0097] In some embodiments, the stirring device 1000 may further include a container for containing the slurry, and the stirring wheel 300 extends into the container to stir the slurry in the container.

[0098] The stirring device 1000 of the embodiment of the present application can effectively prevent lubricating grease from leaking into the slurry, reduce the risk of slurry contamination, and improve the quality of the stirred slurry.

[0099] An embodiment of the third aspect of the present application provides a battery production device, including the stirring device 1000 as described above.

[0100] The battery production equipment can be a production equipment for battery pole pieces, and can specifically be used to prepare slurry on the pole pieces.

[0101] The battery production equipment in this embodiment can have all the beneficial effects of the above-mentioned stirring device 1000, which will not be described in detail here.

[0102] The embodiments of the present application are described in further detail below with reference to FIG. 1 to FIG. 6 .

[0103] As shown in Figures 1 to 6, the stirring device 1000 includes a driving device 200, a transmission device 100 and a stirring wheel 300; the upper end of the rotating shaft 110 of the transmission device 100 is transmission-connected to the driving device 200, and the stirring wheel 300 is transmission-connected to the lower end of the rotating shaft 110 of the transmission device 100.

[0104] The transmission device 100 includes a rotating shaft 110 , a supporting assembly 120 , an oil shielding assembly 130 , and an oil receiving box 140 .

[0105] The rotating shaft 110 is used to connect with the driving device 200 and rotate under the drive of the driving device 200; the rotating shaft 110 is vertical, and the rotating shaft 110 is sequentially provided with an oil blocking assembly 130, a supporting assembly 120 and an oil receiving box 140 from top to bottom.

[0106] The oil baffle assembly 130 includes an oil flinger plate 131 , which includes a mounting cylinder 1311 and an annular plate body 1312 . The mounting cylinder 1311 is fixedly connected to the rotating shaft 110 , and the plate body 1312 is connected to the outer side of the mounting cylinder 1311 .

[0107] In some embodiments, the oil baffle assembly 130 also includes a plurality of stirring rods 132, which are arranged at intervals along the circumference of the rotating shaft 110 and rotate with the rotating shaft 110. The plurality of stirring rods 132 are located on the side of the oil-spraying plate 131 close to the driving device 200, and the plurality of stirring rods 132 are fixedly connected to the mounting cylinder 1311.

[0108] The support assembly 120 is spaced apart from the oil deflector assembly 130 and includes a fixed seat 121, a bearing 122, a first end cap 123, a second end cap 124, and a sealing assembly 127. The fixed seat 121 includes a through hole for allowing the rotating shaft 110 to pass through and a sewage outlet 126. The bearing 122 is located in the through hole of the fixed seat 121 and is sleeved on the surface of the rotating shaft 110. The first end cap 123 is fixedly connected to a first surface 1211 of the fixed seat 121 facing the oil slingering pan 131 and limits the bearing 122 in the axial direction.

[0109] A receiving groove 125 is formed on the surface of the support assembly 120 facing the oil-slinging pan 131. In some embodiments, the receiving groove 125 is located on the first surface 1211 of the fixing base 121 and is connected to the drain port 126. The receiving groove 125 is used to receive the lubricating grease spun off the oil-slinging pan 131 and discharge the lubricating grease through the drain port 126.

[0110] The outer side surface of the first end cover 123 facing the oil-slinging pan 131 includes an inclined guide surface 1231 . The height of the guide surface 1231 from the connection surface between the first end cover 123 and the fixing seat 121 gradually decreases in the radial outward direction of the rotating shaft 110 .

[0111] The second end cover 124 is fixedly connected to the second surface 1212 of the fixing seat 121 away from the oil-slinging plate 131. The sealing assembly 127 is located between the second end cover 124 and the rotating shaft 110. The sealing assembly 127 includes a first seal 1271 and a second seal 1272 which are arranged in sequence along the axial direction of the rotating shaft 110 and away from the bearing 122. The first seal 1271 is a single-lip skeleton oil seal, and the second seal 1272 is a double-lip skeleton oil seal.

[0112] The oil receiving box 140 is installed below the supporting assembly 120 . The oil receiving box 140 includes an inner wall 142 and an outer wall 143 forming an oil receiving groove 141 , and a bottom wall 144 connecting the inner wall 142 and the outer wall 143 .

[0113] In some embodiments, the oil receiving box 140 is fixedly connected to the support assembly 120 .

[0114] In some embodiments, the oil receiving box 140 is fixedly connected to the rotating shaft 110, and the angle between the outer wall 143 and the bottom wall 144 is an acute angle. The angle α between the outer wall 143 and the bottom wall 144 satisfies: 45°≤α<90°. Furthermore, the angle α between the outer wall 143 and the bottom wall 144 satisfies: 60°≤α≤80°.

[0115] In the embodiment of the present application, by providing an oil blocking assembly 130, the lubricating grease leaking from the drive device 200 above the transmission device 100 can be blocked, and the blocked lubricating grease can be thrown out to the surroundings, then received by the receiving groove 125 and discharged through the drain port 126. In addition, a sealing assembly 127 is provided to seal the lubricating grease of the bearing 122 to prevent the lubricating grease of the bearing 122 from leaking and contaminating the slurry. An oil receiving box 140 is also provided below the sealing assembly 127 to prevent the lubricating grease in the bearing 122 from falling into the slurry after breaking through the seal of the sealing assembly 127, thereby effectively improving the sealing performance, reducing the risk of slurry contamination, and helping to improve the production quality of the battery.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A transmission device, comprising A rotating shaft, used to be connected to a driving device and rotated under the driving of the driving device; A support assembly, movably connected to the rotating shaft and allowing the rotating shaft to pass through; The oil-blocking assembly comprises an oil-slinging plate, wherein the oil-slinging plate is sleeved on the surface of the rotating shaft, the oil-slinging plate is located on a side of the supporting assembly close to the driving device and is spaced apart from the supporting assembly; in, A receiving groove is formed on a surface of the support assembly facing the oil-slinging pan, and the receiving groove is used to receive the lubricating grease thrown out by the oil-slinging pan.

2. The transmission device according to claim 1, wherein: The support assembly comprises: The fixing seat comprises a through hole for allowing the rotating shaft to pass through and a drain port, a bearing, located in the through hole of the fixing seat and sleeved on the surface of the rotating shaft, and A first end cover, fixedly connected to a first surface of the fixing seat facing the oil-slinging pan and limiting the bearing in the axial direction; Wherein, the receiving groove is located on the first surface of the fixing seat, and the receiving groove is communicated with the sewage outlet.

3. The transmission device according to claim 2, wherein: The outer side surface of the first end cover facing the oil-slinging pan comprises an inclined guide surface, and the height of the guide surface from the connecting surface of the first end cover and the fixing seat gradually decreases in the radial outward direction of the rotating shaft.

4. The transmission device according to claim 2, wherein: The support assembly also includes: a second end cover, the second end cover being fixedly connected to a second surface of the fixing base away from the oil-slinging pan, and A sealing assembly is located between the second end cover and the rotating shaft to seal a gap between the second end cover and the rotating shaft.

5. The transmission device according to claim 4, wherein: The sealing assembly includes a first sealing member and a second sealing member which are sequentially arranged along the axial direction of the rotating shaft, and the first sealing member and the second sealing member are different oil seal types.

6. The transmission device according to claim 5, wherein: The first seal is located on a side of the second seal close to the bearing. The first seal is a single-lip skeleton oil seal, and the second seal is a double-lip skeleton oil seal.

7. The transmission device according to any one of claims 1 to 6, wherein: The oil baffle assembly further comprises a plurality of stirring rods, which are arranged at intervals along the circumference of the rotating shaft and rotate along with the rotating shaft, and the stirring rods are located on a side of the oil-slinging plate close to the driving device.

8. The transmission device according to claim 7, wherein: The oil-slinging plate comprises a mounting tube and an annular plate body, wherein the mounting tube is fixedly connected to the rotating shaft, and the plate body is connected to the outer side surface of the mounting tube; Wherein, the stirring rod is fixedly connected to the mounting cylinder.

9. The transmission device according to any one of claims 1 to 8, wherein: The transmission device also includes: An oil receiving box is located at a side of the support assembly away from the oil throwing pan, and the oil receiving box includes an oil receiving groove with an opening toward the support assembly.

10. The transmission device according to claim 9, wherein: The oil receiving box is fixedly connected to the supporting assembly.

11. The transmission device according to claim 9, wherein: The oil receiving box is fixedly connected to the rotating shaft, and the oil receiving box includes an inner wall and an outer wall forming the oil receiving groove, and a bottom wall connecting the inner wall and the outer wall; Wherein, the included angle between the outer side wall and the bottom wall is an acute angle.

12. The transmission device according to claim 11, wherein: An included angle α between the outer side wall and the bottom wall satisfies: 45°≤α<90°.

13. The transmission device according to claim 12, wherein: An included angle α between the outer side wall and the bottom wall satisfies: 60°≤α≤80°.

14. A stirring device comprising: Drive device, The transmission device according to any one of claims 1 to 13, wherein one end of the rotating shaft of the transmission device is drivingly connected to the driving device, and The stirring wheel is drivingly connected to the other end of the rotating shaft of the transmission device.

15. A battery production device comprising the stirring device according to claim 14.

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