Sealing oil storage structure for stirring shaft

Abstract

The utility model relates to a sealing oil storage structure for a stirring shaft, which comprises an oil storage component, the oil storage component comprises an oil storage disc mounted on the stirring shaft and an oil storage cavity formed at the top of the oil storage disc, and the oil storage cavity is used for storing oil dripping from a bearing unit. According to the sealing oil storage structure for the stirring shaft, the oil storage assembly is arranged to collect oil dripping from the bearing, the sealing assembly is arranged to improve the sealing performance of the oil storage assembly, and the oil is prevented from flowing into a stirring tank below to pollute battery slurry in the stirring tank; meanwhile, due to the arrangement of the dustproof assembly, external dust can be prevented from entering the oil storage tank, and the utilization rate of oil liquid is increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery production technical field, concretely relates to a sealed oil storage structure for stirring shaft. BACKGROUND

[0002] In the electrode manufacturing process of power battery, the positive slurry is composed of binder, conductive agent and positive material; and the negative slurry is composed of binder and graphite carbon powder. The preparation of positive and negative slurry includes a series of processes such as mixing, dissolving and dispersing between liquid and liquid, liquid and solid materials. In the positive and negative slurry, the dispersibility and uniformity of the granular active material directly affect the movement of ions between the two poles of the power battery, so the mixing and dispersion of the slurry of each pole piece material are crucial in the production of power battery.

[0003] In order to fully mix the battery slurry, a stirring tank is usually used, that is, various raw materials to be mixed are put into the stirring tank, and the stirring shaft is rotated by the motor to stir the battery slurry in the stirring tank. The bearing seat structure between the stirring shaft and the stirring tank is inevitably used to support the stirring shaft and improve the stability of the rotation of the stirring shaft.

[0004] In order to reduce the friction between the stirring shaft and the bearing and reduce the wear, butter is needed to be applied to the bearing part. The surface temperature of the bearing rotating at high speed during stirring will rise, and at this time the liquefied butter is easy to penetrate and flow into the stirring tank, thereby polluting the battery slurry in the stirring tank. UTILITY MODEL CONTENTS

[0005] The utility model provides a sealed oil storage structure for stirring shaft, solves the defect that oil liquid is easy to penetrate and flow into the stirring tank and pollute the battery slurry in the stirring tank.

[0006] In order to achieve the above purpose, the utility model adopts the technical scheme of a sealed oil storage structure for stirring shaft, which is rotatably installed between bearing units, and it comprises:

[0007] The oil storage assembly comprises an oil storage disc installed on the stirring shaft and an oil storage cavity formed at the top of the oil storage disc, and the oil storage cavity is used for collecting the oil liquid dropped by the bearing unit.

[0008] Optimally, it further comprises a sealing assembly installed at the bottom of the bearing unit and a dustproof assembly formed between the sealing assembly and the oil storage disc, and the sealing assembly is used for closing the oil storage disc and the bearing unit.

[0009] Optimally, the sealing assembly comprises a sealing disc installed at the bottom of the bearing unit and a sealing piece held on the oil storage disc.

[0010] Optimally, the dustproof assembly includes at least one dustproof cavity formed between the sealing disc and the oil reservoir, the dustproof cavity being connected to the oil reservoir.

[0011] Optimally, the dustproof assembly further includes a protrusion integrally connected to the top of the oil reservoir and a groove formed at the bottom of the sealing disc and cooperating with the protrusion, wherein the dustproof cavity is formed between the groove and the protrusion.

[0012] Optimally, the seal includes a seal body abutting between the seal disc and the oil reservoir, and a sealing lip and a dustproof lip integrally connected to the seal body on the side near the oil reservoir.

[0013] Optimally, the seal further includes a clamping unit for pressing the sealing lip against the oil reservoir.

[0014] Ideally, the clamping unit includes a spring groove formed on one side of the sealing element body and disposed opposite to the sealing lip, and a clamping spring clamped in the spring groove.

[0015] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0016] This utility model relates to a sealed oil storage structure for agitator shaft. By setting up an oil storage component, it collects the oil dripping from the bearing. By setting up a sealing component, it improves the sealing performance of the oil storage component, preventing oil from flowing into the agitator tank below and contaminating the battery slurry inside the agitator. At the same time, the dustproof component can prevent external dust from entering the oil storage tank, thereby improving the utilization rate of the oil. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the sealing element of this utility model;

[0019] Figure 3 This is a cross-sectional view of the dustproof component of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the oil storage component of this utility model;

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Sealing disc; 2. Transition groove; 3. Outer slot; 4. Seal; 401. First abutment part; 402. Second abutment part; 403. Third abutment part; 404. Temporary storage groove; 405. Spring groove; 406. Hoop spring; 407. Sealing lip; 408. Dustproof lip; 5. Oil reservoir; 6. Oil reservoir; 7. Protrusion; 8. Groove; 9. Dustproof cavity; 10. Sleeve; 11. Inner slot; 12. Sealing groove; 13. Bearing seat; 14. Bearing; 15. Stirring shaft; 16. Oil injection groove. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0024] like Figure 1 The diagram shown is a cross-sectional view of the sealing oil storage structure for the stirring shaft of this utility model. It is commonly used in the field of battery slurry stirring. While stirring the battery slurry, it collects the dripping oil to prevent the oil from falling into the stirring tank below and contaminating the battery slurry. It includes a bearing unit, a stirring shaft 15, and an oil storage structure.

[0025] The mixing tank has a hollow interior structure to hold the battery slurry raw materials to be mixed. The bottom of the mixing tank is fixed to the workshop floor by a support frame (specifically, the support frame is fixed to the workshop floor by bolts, and the bottom of the mixing tank is fixed to the support frame by welding. The support frame lifts the mixing tank off the ground, which can improve the stability of the overall structure and prevent the mixing tank from rusting due to long-term contact with the ground).

[0026] The bearing unit is mounted on top of the mixing tank to support the stirring shaft 15. When the drive mechanism rotates the stirring shaft 15, it improves the stability of the stirring shaft 15. Figure 1 As shown, the bearing unit includes a bearing housing 13 and a bearing 14 installed inside the bearing housing 13. The bearing housing 13 is fixed to the top of the mixing tank by screw fastening (specifically, the bearing housing 13 has a through hole in the vertical direction, and the top of the mixing tank has a corresponding threaded hole. The fastening bolt passes through the through hole on the bearing housing 13 and is screwed into the threaded hole on the top of the mixing tank, thus completing the installation of the bearing housing 13 and the mixing tank).

[0027] The stirring shaft 15 is installed in the bearing 14 of the bearing housing 13 by an interference fit. When the drive mechanism drives the stirring shaft 15 to rotate, the bearing 14 supports the stirring shaft 15, thereby improving the stability of the stirring shaft 15 rotation.

[0028] like Figure 1As shown, an oil filling groove is provided inside the stirring shaft 15, which makes it convenient for the operator to fill the bearing 14 with oil, thereby reducing the friction between the stirring shaft 15 and the bearing 14, and at the same time playing a certain role in cooling the high-speed rotating bearing 14, thus extending its service life.

[0029] like Figure 1 As shown, the oil injection groove 16 includes a main oil injection groove and a secondary oil injection groove. The main oil injection groove is axially formed at the top of the stirring shaft 15 and extends downward into the stirring shaft 15. The main oil injection groove is coaxially arranged with the stirring shaft 15 to ensure uniform distribution of lubricating oil and reduce friction loss. When the main oil injection groove is coaxial with the stirring shaft 15, the lubricating oil can flow more smoothly into the bearing 14 and other parts that require lubrication, ensuring that each part receives sufficient lubrication. This design can reduce lubricating oil leakage, improve lubrication effect, and thus extend the service life of the equipment.

[0030] The auxiliary oil injection groove is radially opened on one side of the stirring shaft 15 and is connected to the main oil injection groove. The side of the auxiliary oil injection groove away from the main oil injection groove is connected to the bearing 14 in the bearing housing 13. The operator injects grease into the main oil injection groove, and it flows into the bearing 14 along the auxiliary oil injection groove, thereby completing the oiling of the bearing 14 (when oiling, the operator holds the oil injection gun and aims the nozzle of the oil injection gun at the oil injection port at the top of the main oil injection groove to inject oil).

[0031] The drive mechanism is mounted on top of the mixing tank to drive the stirring shaft 15 to rotate, thereby agitating the battery slurry inside the mixing tank. The drive mechanism can be driven by gear transmission or synchronous belt transmission.

[0032] When a gear drive is selected, the drive mechanism includes a drive motor, a driving gear, and a driven gear. The drive motor housing is fixed to the top of the mixing tank with screws, and the motor shaft faces upwards. The driving gear is mounted on the drive motor shaft via a key connection, and the driven gear is mounted on the mixing shaft 15 via a key connection and meshes with the driving gear. When the drive motor drives the driving gear to rotate, it drives the driven gear to rotate synchronously, which in turn drives the mixing shaft 15 to rotate, thereby agitating the battery slurry in the mixing tank.

[0033] When a synchronous belt drive is selected, the drive mechanism includes a drive motor, a main synchronous pulley, a secondary synchronous pulley, and a toothed belt. The drive motor housing is fixed to the top of the mixing tank with screws, and the motor shaft faces upwards. The main synchronous pulley is keyed to the drive motor shaft, and the secondary synchronous pulley is keyed to the mixing shaft 15. The toothed belt is wound around the main and secondary synchronous pulleys.

[0034] When the drive motor drives the main synchronous pulley to rotate, it drives the auxiliary synchronous pulley to rotate synchronously through the toothed belt, which in turn drives the stirring shaft 15 to rotate, so as to stir the battery slurry in the stirring tank (a synchronous pulley is a part with equally spaced sawtooth gears on its outer peripheral surface, which can mesh with the tooth grooves of the toothed belt to transmit motion and power and avoid slippage).

[0035] When the drive mechanism drives the stirring shaft 15 to rotate, the stirring shaft 15 is supported by the bearing 14, which improves the stability of the stirring shaft 15 rotation. At the same time, the grease injected into the bearing 14 can reduce the friction between the stirring shaft 15 and the bearing 14, and at the same time, it can cool down the high-speed rotating bearing 14 and extend its service life.

[0036] The surface temperature of the high-speed rotating bearing 14 will rise, and the semi-solid grease will easily liquefy, flowing down the outer wall of the stirring shaft 15 into the stirring tank below, which will contaminate the battery slurry inside the stirring tank. The oil storage structure is installed at the bottom of the bearing unit to store and collect the dripping oil.

[0037] like Figure 1 As shown, the oil storage structure includes a sealing component, an oil storage component, and a dustproof component. The sealing component is installed at the bottom of the bearing housing 13, and the oil storage component is installed on the stirring shaft 15 and mates with the sealing component. The dustproof component is formed between the sealing component and the oil storage component to improve the sealing performance of both and prevent external impurities from entering the oil storage component. By sealing the oil storage component sequentially with the sealing component and the oil storage component, its sealing and oil storage performance is improved.

[0038] The sealing assembly includes a sealing disc 1, a transition groove 2, an outer slot 3, and a seal 4. The sealing disc 1 is installed at the bottom of the bearing housing 13 by bolts. The transition groove 2 is located at the top of the sealing disc 1. The transition groove 2 is stepped and gradually decreases in diameter from top to bottom. The oil dripping from the bearing 14 falls into the stepped transition groove 2 and is then stored in the transition groove 2 and the seal 4, preventing the oil from falling into the mixing tank and contaminating the battery slurry inside.

[0039] By setting a stepped transition groove 2, the dripping oil is buffered, making it easier for the transition groove 2 and the seal 4 to collect the oil and preventing it from falling directly into the transition groove 2 and causing splashing.

[0040] The outer slot 3 extends axially through the sealing disc 1. The outer slot 3 is used to install the sleeve 10 of the oil storage assembly, and also provides clearance space for the installation of the stirring shaft 15. The seal 4 is installed at the bottom of the transition groove 2 and clamped on the sleeve 10 of the oil storage disc 5 to prevent oil from flowing into the mixing tank below through the gap between the sealing disc 1 and the sleeve 10.

[0041] like Figure 4As shown, the oil storage assembly includes an oil storage pan 5, an oil storage tank 6, a sleeve 10, an inner slot 11, and a sealing groove 12. The sleeve 10 is integrally connected to the top of the oil storage pan 5, and the inner slot 11 penetrates vertically through the sleeve 10 and the oil storage pan 5. Figure 1 As shown, the oil storage pan 5 is installed at the bottom of the stirring shaft 15 by an interference fit. When the driving mechanism drives the stirring shaft 15 to rotate, it will drive the oil storage pan 5 to rotate synchronously.

[0042] like Figure 1 As shown, the sleeve 10 at the top of the oil reservoir 5 passes through the outer slot 3 of the sealing plate 1, and the diameter of the outer slot 3 is slightly larger than the outer diameter of the sleeve 10, so that friction between the sleeve 10 and the oil reservoir 5 is avoided when the sleeve 10 rotates. Since there is a small gap between the sleeve 10 and the oil reservoir 5, the dripping oil can easily flow into the gap between the two. Therefore, the sealing element 4 installed in the transition groove 2 plays a sealing role.

[0043] like Figure 3 , 4 As shown, the oil storage tank 6 is arranged around the top of the oil storage pan 5 and extends downward. Due to wear, the sealing performance between the sleeve 10 and the seal 4 deteriorates after the stirring shaft 15 rotates for a long time. Some oil will still flow down through the gap between the seal pan 1 and the sleeve 10. The oil storage tank 6 is used to store and collect the leaked oil at this time, so as to prevent it from flowing down into the stirring tank and contaminating the battery slurry inside.

[0044] The sealing groove 12 is located inside the oil storage pan 5. When the oil storage pan 5 is installed, a sealing ring is installed in the sealing groove 12 to fit on the stirring shaft 15, so as to prevent oil from seeping downward from between the stirring shaft 15 and the oil storage pan 5.

[0045] The seal 4 is installed at the bottom of the transition groove 2 by interference fit and is clamped on the sleeve 10. When the stirring shaft 15 drives the sleeve 10 to rotate, the seal 4 is stuck at the bottom of the transition groove 2 and remains stationary. The lip structure on the inner side of the seal 4 will abut against the outer surface of the sleeve 10, and relative movement will occur between the sleeve 10 and the lip. Due to its elastic properties, the lip will tightly adhere to the surface of the sleeve 10, forming a sealing barrier and having a certain oil scraping effect. It can scrape the lubricating oil attached to the surface of the sleeve 10 back into the transition groove 2 to prevent oil leakage.

[0046] like Figure 2As shown, the sealing element 4 includes a first abutment portion 401, a second abutment portion 402, a third abutment portion 403, a temporary storage groove 404, a spring groove 405, a clamping spring 406, a sealing lip 407, and a dustproof lip 408. The first abutment portion 401, the second abutment portion 402, and the third abutment portion 403 are integrally connected and form a "]" shape. The first abutment portion 401 and the second abutment portion 402 abut against the edge and bottom of the transition groove 2, respectively, and the third abutment portion 403 abuts against the outer side of the sleeve 10.

[0047] The first abutment part 401, the second abutment part 402, and the third abutment part 403 form a temporary storage groove 404 for storing oil dripping from the bearing 14. A sealing lip 407 is integrally connected to the third abutment part 403 on the side near the sleeve 10, directly contacting the sleeve 10 to prevent oil leakage from the sleeve 10. The sealing lip 407 is typically made of rubber or synthetic rubber, possessing a certain degree of elasticity and wear resistance.

[0048] A spring groove 405 is formed on the side of the third abutment 403 away from the sleeve 10 and is disposed opposite to the sealing lip 407. A clamping spring 406 is fitted inside the spring groove 405 to provide pressure on the sealing lip 407, which helps to ensure that the sealing lip 407 always maintains a tight contact with the sleeve 10, thereby improving the sealing performance.

[0049] The dust lip 408 is integrally connected to one side of the second abutment 402 and abuts against the outer wall of the sleeve 10. The dust lip 408 is used to prevent dust and particles from entering the oil seal, thereby reducing wear on the sealing lip 407. Figure 2 As shown, the dustproof lip 408 is inclined (i.e., the side of the dustproof lip 408 away from the sleeve 10 is higher than the side of the dustproof lip 408 close to the sleeve 10). Therefore, another oil storage cavity is formed between the dustproof lip 408 and the sealing lip 407. By increasing the number of oil storage cavities, the sealing and oil storage performance is improved (therefore, the dustproof lip 408 has two functions: first, it is used to seal and prevent dust and particles from entering the oil seal, thereby reducing the wear on the sealing lip 407; second, it forms another oil storage cavity with the sealing lip 407 to improve the sealing and oil storage performance).

[0050] like Figure 3 As shown, a dustproof assembly is formed between the sealing assembly and the oil reservoir assembly to improve the sealing performance of both and prevent external impurities from entering the oil reservoir assembly. The dustproof assembly includes a protrusion 7, a groove 8, and a dustproof cavity 9. The protrusion 7 is integrally connected to the top of the oil reservoir 5, and the groove 8 is formed at the bottom of the sealing plate 1 and mates with the protrusion 7. When the oil reservoir 5 is installed on the stirring shaft 15, the protrusion 7 at the top of the oil reservoir 5 is inserted into the groove 8 at the bottom of the sealing plate 1, forming a dustproof cavity 9 between the protrusion 7 and the groove 8.

[0051] like Figure 3 , 4 As shown, both the protrusion 7 and the groove 8 are annular, so when the stirring shaft 15 drives the oil storage plate 5 to rotate, there will be no interference between the protrusion 7 and the groove 8. The height of the protrusion 7 is less than the depth of the groove 8, and the protrusion 7 is located between the groove 8, thereby forming a dustproof cavity 9 between them.

[0052] The oil storage tank 6 is connected to the external environment through the dustproof chamber 9 to balance the air pressure inside the oil storage tank 6. By setting up the dustproof chamber 9, the air pressure inside the oil storage tank 6 can be balanced, and the dustproof function can be achieved by increasing the flow path, so as to prevent external dust from entering the oil storage tank 6 and contaminating the oil inside (the oil inside the oil storage tank 6 is cleaned and recycled regularly to save costs).

[0053] The number of dustproof chambers 9 is at least one. Figure 3 , 4 The structure of the three dustproof chambers 9 is shown. In actual production, the number of dustproof chambers 9 can be appropriately increased according to the sealing requirements of production.

[0054] This utility model's sealing oil storage structure for agitator shaft uses a combination of sealing and oil storage components to store and collect oil dripping from the bearing 14, preventing it from flowing into the mixing tank below and contaminating the battery slurry inside the mixing chamber. At the same time, the dustproof component prevents external dust from entering the oil storage tank 6, thus improving the utilization rate of the oil.

[0055] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A sealed oil storage structure for an agitator shaft, wherein the agitator shaft is rotatably mounted between bearing units, characterized in that, It includes: An oil storage assembly includes an oil storage pan (5) mounted on the stirring shaft and an oil storage cavity formed on top of the oil storage pan (5), the oil storage cavity being used to collect oil dripping from the bearing unit.

2. The sealed oil storage structure for a stirring shaft according to claim 1, characterized in that: It also includes a sealing assembly installed at the bottom of the bearing unit and a dustproof assembly formed between the sealing assembly and the oil reservoir (5), the sealing assembly being used to seal the oil reservoir (5) and the bearing unit.

3. The sealed oil storage structure for a stirring shaft according to claim 2, characterized in that: The sealing assembly includes a sealing disc (1) mounted on the bottom of the bearing unit and a seal (4) held on the oil reservoir (5).

4. The sealed oil storage structure for a stirring shaft according to claim 3, characterized in that: The dustproof assembly includes at least one dustproof cavity (9) formed between the sealing disc (1) and the oil storage disc (5), and the dustproof cavity (9) is connected to the oil storage cavity.

5. The sealed oil storage structure for a stirring shaft according to claim 4, characterized in that: The dustproof assembly also includes a protrusion (7) integrally connected to the top of the oil storage pan (5) and a groove (8) formed at the bottom of the sealing pan (1) and cooperating with the protrusion (7), and the dustproof cavity (9) is formed between the groove (8) and the protrusion (7).

6. The sealed oil storage structure for a stirring shaft according to claim 3, characterized in that: The seal (4) includes a seal body abutting between the seal disc (1) and the oil reservoir (5) and a sealing lip (407) and a dustproof lip (408) integrally connected to the side of the seal body near the oil reservoir (5).

7. The sealed oil storage structure for a stirring shaft according to claim 6, characterized in that: The seal (4) also includes a clamping unit for pressing the sealing lip (407) against the oil reservoir (5).

8. The sealed oil storage structure for a stirring shaft according to claim 7, characterized in that: The clamping unit includes a spring groove (405) formed on one side of the sealing body and disposed opposite to the sealing lip (407) and a clamping spring (406) clamped in the spring groove (405).

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