A wet ball mill for lithium titanate anode materials

Abstract

This utility model provides a wet ball mill for lithium titanate anode materials, relating to the technical field of ball milling equipment. It includes a machine body, a main grinding disc, and a grinding jar. Several positioning mechanisms are installed on the main grinding disc. Each positioning mechanism includes a positioning seat, positioning pullers, a support beam, a screw, and an anti-loosening nut. The two sides of the support beam are engaged with the positioning pullers. A threaded sleeve is provided in the middle of the support beam. The anti-loosening nut abuts against its upper side. A support ring is rotatably fitted on the upper side of the anti-loosening nut. Several sets of spaced-apart connecting blocks are provided on both sides of the support ring. Anti-detachment hooks are rotatably connected to the connecting blocks and hook onto the threaded sleeve. In this utility model, the anti-detachment hooks can axially fix the anti-loosening nut to the support beam, preventing vibration from causing the anti-loosening nut to loosen on the screw, which in turn would cause the screw to loosen on the support beam, resulting in a failure of the grinding jar's seal.

Description

Technical Field

[0001] This utility model relates to the field of ball milling equipment technology, specifically a wet ball mill for lithium titanate anode materials. Background Technology

[0002] Lithium titanate, as a "zero-strain material," exhibits a volume strain of less than 1% during charge and discharge, resulting in excellent cycle performance. Its discharge voltage is relatively stable and it does not decompose the electrolyte, thus enhancing the overall safety performance of lithium batteries. Planetary ball mills, through high-energy mechanochemical effects, simultaneously address three core challenges in lithium titanate preparation: particle nano-sizing, component homogenization, and in-situ composite formation. This makes it an irreplaceable tool for overcoming the bottlenecks in its electrochemical performance.

[0003] Existing planetary ball mills typically use bolts to press and fasten the cover plate to the upper side of the ball mill jar tube to achieve a sealing effect. They also use caps to prevent the nuts and screws from loosening under vibration, ensuring the sealing and safety of the ball mill jar. However, during the grinding process of lithium titanate anode material, ultrafine powder is easily embedded in the thread gap, damaging the contact surface between the nut and the screw, significantly reducing the self-locking friction, and causing the anti-loosening effect to fail. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a wet ball mill for lithium titanate anode materials, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A wet ball mill for lithium titanate anode materials includes a machine body, a main grinding disc, and a grinding jar. Several positioning mechanisms are installed on the main grinding disc. Each positioning mechanism includes a positioning seat, a positioning puller, a support beam, a screw, and an anti-loosening nut. The positioning seat is rotatably connected to the main grinding disc. The grinding jar is placed on the main grinding disc. The positioning puller is integrally formed on the positioning seat and extends upwards. Positioning openings are provided on both sides of the positioning puller. The support beam extends through the positioning openings on both sides. A threaded sleeve is provided in the middle of the support beam. The screw is threaded through the threaded sleeve. A pressure block is provided at the lower end of the screw. The anti-loosening nut is threadedly sleeved on the screw and abuts against the upper side of the anti-loosening nut. An anti-disengagement hook is rotatably connected to the anti-loosening nut. A positioning edge is provided on the outer edge of the threaded sleeve. The anti-disengagement hook extends downwards and hooks onto the positioning edge.

[0009] Preferably, the outer wall of the anti-loosening nut is provided with a sliding ring groove, a support ring is rotatably sleeved on the sliding ring groove, and several sets of two connecting blocks are provided on both sides of the support ring at intervals. An installation gap is provided between the two connecting blocks, and the anti-loosening hook is rotatably connected within the installation gap.

[0010] Preferably, the upper end of the anti-detachment hook is fixed with a connecting shaft, and the connecting shaft is rotatably connected to the connecting block.

[0011] Preferably, the connecting block is provided with a pivot hole, a pressing sleeve is slidably sleeved on the outer side of the connecting shaft, a plurality of guide strips extend axially on the inner wall of the pressing sleeve, a guide groove is provided on the outer wall of the connecting shaft to cooperate with the guide strips, and the pressing sleeve is rotatably connected in the pivot hole.

[0012] Preferably, a fixed ratchet ring is fixed on the inner side of the connecting block, a movable ratchet ring is provided on the side of the pressing sleeve facing the anti-detachment hook, the fixed ratchet ring and the movable ratchet ring mesh with each other, a locking spring is connected between the anti-detachment hook and the movable ratchet ring, and a pressing button is fixed on the outer end of the pressing sleeve.

[0013] Preferably, the upper side of the anti-detachment hook is integrally formed with a protrusion, and the protrusion is slidably connected to the inner side of the connecting block.

[0014] Preferably, the ram screw is fitted with an anti-loosening washer, which is positioned between the anti-loosening nut and the threaded sleeve.

[0015] (III) Beneficial Effects

[0016] This invention provides a wet ball mill for lithium titanate anode materials. It has the following advantages:

[0017] 1. In this utility model, the anti-loosening nut and the threaded sleeve can be hooked together by the anti-loosening hook, and the anti-loosening nut and the threaded sleeve are fixed in the axial direction, so as to prevent the anti-loosening nut and the screw from loosening under vibration, and prevent the screw from slipping on the support beam, ensuring the stable compression of the screw on the grinding jar, and ensuring the sealing and safety of the ball mill jar. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a wet ball mill for lithium titanate anode material according to the present invention;

[0019] Figure 2 This is a schematic diagram of the positioning mechanism in this utility model;

[0020] Figure 3 This is a schematic diagram of the ram screw in this utility model;

[0021] Figure 4 This is a cross-sectional view of the supporting beam in this utility model;

[0022] Figure 5 This is a schematic diagram of the anti-loosening nut in this utility model.

[0023] Figure 6 for Figure 5 Enlarged view of a portion of point A in the middle.

[0024] In the diagram: 1. Machine body; 2. Ball mill main disc; 3. Positioning seat; 4. Positioning puller; 5. Support beam; 6. Claw screw; 7. Anti-loosening nut; 8. Positioning opening; 9. Threaded sleeve; 10. Anti-detachment washer; 11. Support ring; 12. Connecting block; 13. Anti-detachment hook; 14. Connecting shaft; 15. Pressing sleeve; 16. Protrusion; 17. Fixed ratchet ring; 18. Moving ratchet ring; 19. Locking spring; 20. Press button. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0026] This utility model embodiment provides a wet ball mill for lithium titanate anode materials, such as... Figure 1-6 As shown, it includes a machine body 1, a ball milling disc 2, and a grinding jar. The grinding jar includes a jar body, a cover plate, and several grinding balls placed inside the jar body. The cover plate is fastened to the upper side of the jar body.

[0027] like Figure 2As shown, the main mill disc 2 is equipped with several positioning mechanisms. Each positioning mechanism includes a positioning seat 3, a positioning puller 4, a support beam 5, a screw 6, and a locking nut 7. The positioning seat 3 is rotatably connected to the main mill disc 2. A placement groove is provided on the upper side of the positioning seat 3, and the tank body is placed within the placement groove. The positioning puller 4 is integrally formed on the positioning seat 3 and extends upwards. Several positioning openings 8 are provided on both sides of the positioning puller 4. The support beam 5 extends through the positioning openings 8 on both sides. The left and right ends of the support beam 5 are provided with locking edges. The support beam 5 abuts against the upper sidewall of the positioning openings 8. A locking nut is provided in the middle of the support beam 5. A threaded sleeve 9 is provided, and a positioning edge is provided on the outer edge of the threaded sleeve 9. The positioning edge has locking grooves on both sides extending towards the supporting beam 5. The screw 6 is threaded through the threaded sleeve 9. A pressure block is provided at the lower end of the screw 6. The pressure block abuts and presses against the upper side of the cover plate. A bearing seat is provided on the upper side of the pressure block. The lower end of the screw 6 is rotatably connected to the bearing seat. A lock nut 7 is threadedly sleeved on the screw 6. An anti-loosening washer 10 is sleeved on the screw 6. The anti-loosening washer 10 is provided between the lock nut 7 and the threaded sleeve 9. The lock nut 7 abuts against the upper side of the anti-loosening washer 10.

[0028] like Figure 3-5 As shown, the outer wall of the anti-loosening nut 7 has a sliding annular groove, and a support ring 11 is rotatably sleeved on the sliding annular groove. Several sets of two spaced-apart connecting blocks 12 are provided on both sides of the support ring 11, with an installation gap between the two connecting blocks 12. A pivot hole is provided on each connecting block 12. An anti-loosening hook 13 is slidably installed within the installation gap. A connecting shaft 14 is fixed to both sides at the upper end of the anti-loosening hook 13. Several axially extending guide grooves are provided on the outer wall of the connecting shaft 14. A pressing sleeve 15 is slidably sleeved on the outer wall of the connecting shaft 14. Several guide strips extend axially from the inner wall of the pressing sleeve 15. The guide strips slide and engage with the guide grooves. The pressure sleeve 15 is rotatably connected in the pivot hole. The upper side of the anti-detachment hook 13 is integrally formed with a protrusion 16. The protrusion 16 is slidably connected to the inner side of the connecting block 12. The protrusion 16 can abut against the connecting block 12 on both sides, which can prevent the anti-detachment hook 13 from sliding left and right in the installation gap, so that the anti-detachment hook 13 can only rotate vertically up and down. The lower end of the anti-detachment hook 13 is integrally formed with a protruding hook. The protruding hook is engaged in the locking groove, which can lock the anti-detachment nut on the support beam 5, and prevent the anti-detachment nut from loosening with the screw 6 under vibration, thus detaching from the compression of the anti-detachment gasket 10, which would cause the anti-detachment gasket 10 to loosen on the support beam 5, and cause the cover plate to fail to seal the tank.

[0029] like Figure 5-6As shown, a fixed ratchet ring 17 is fixed on the inner side of the connecting block 12, and a movable ratchet ring 18 is provided on the side of the pressing sleeve 15 facing the anti-detachment hook 13. The fixed ratchet ring 17 and the movable ratchet ring 18 mesh with each other. A locking spring 19 is connected between the anti-detachment hook 13 and the movable ratchet ring 18. A pressing button 20 is fixed on the outer end of the pressing sleeve 15. The fixed ratchet ring 17 and the movable ratchet ring 18 cooperate to enable the anti-detachment hook 13 to rotate unidirectionally on the connecting block 12. The anti-detachment hook 13 can only rotate downwards and cannot rotate in the opposite direction. When it is necessary to finish grinding and disassemble, push the pressing button 20 to slide the pressing sleeve 15 inwards, so that the fixed ratchet ring 17 and the movable ratchet ring 18 are separated and unlocked, and the anti-detachment hook 13 can be removed.

[0030] Working principle:

[0031] In this utility model, when it is necessary to install the grinding tank, the screw 6 is rotated to make the screw 6 slide downward relative to the threaded sleeve 9 of the support beam 5 until the pressure block abuts against the upper side of the cover plate. The screw 6 is then rotated to push the support horizontally upward, so that it abuts against the upper edge of the positioning opening 8. The reaction force of the positioning opening 8 on the support beam 5 is pressed against the cover plate, so that the cover plate is pressed tightly against the upper side of the tank to form a seal, which can prevent material leakage during the rotating ball mill. After tightening, the anti-loosening nut 7 needs to be rotated so that the anti-loosening nut 7 is pressed against the loosening shim 10. The loosening purpose is achieved by the friction between the loosening shim 10, the anti-loosening nut 7 and the threaded sleeve 9.

[0032] Then rotate the anti-disengagement hook 13 so that it engages in the locking groove, thereby limiting the vertical movement of the support beam 5 and the anti-loosening nut 7. Under the unidirectional rotation restriction of the fixed ratchet ring 17 and the moving ratchet ring 18, the anti-disengagement hook 13 will not disengage from the locking groove, preventing the anti-loosening nut 7 from loosening upward on the screw rod 6 under vibration. Even if there is no loosening space between the screw rod 6 and the threaded sleeve 9 on the support beam 5, the screw rod 6 will not disengage from the pressure on the cover plate, ensuring the sealing and safety of the ball mill jar.

[0033] After the ball milling is finished, push the pressing knob to make the pressing sleeve 15 slide axially on the connecting shaft 14, the fixed ratchet ring 17 and the moving ratchet ring 18 separate from each other, and lock the release hook 13 and the connecting block 12. Then the release hook 13 can be flipped over smoothly, and the anti-loosening nut 7 can be rotated to disengage the loosening washer 10, unlock the screw rod and the support beam 5, and the grinding jar can be taken out smoothly by rotating the screw rod 6.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wet ball mill for lithium titanate anode materials, comprising a machine body, a main grinding disc, and a grinding jar, characterized in that: The main grinding disc is equipped with several positioning mechanisms, each including a positioning seat, a positioning puller, a support beam, a screw, and an anti-loosening nut. The positioning seat is rotatably connected to the main grinding disc, and the grinding jar is placed on the main grinding disc. The positioning puller is integrally formed on the positioning seat and extends upward. Positioning openings are provided on both sides of the positioning puller. The support beam extends through the positioning openings on both sides. A threaded sleeve is provided in the middle of the support beam. The screw is threaded through the threaded sleeve. A pressure block is provided at the lower end of the screw. The anti-loosening nut is threadedly sleeved on the screw and abuts against the upper side of the anti-loosening nut. An anti-disengagement hook is rotatably connected to the anti-loosening nut. A positioning edge is provided on the outer edge of the threaded sleeve, and the anti-disengagement hook extends downward and hooks onto the positioning edge.

2. The wet ball mill for lithium titanate anode material according to claim 1, characterized in that: The outer wall of the anti-loosening nut is provided with a sliding ring groove, and a support ring is rotatably sleeved on the sliding ring groove. Several sets of two connecting blocks are provided on both sides of the support ring at intervals, and an installation gap is provided between the two connecting blocks. The anti-loosening hook is rotatably connected within the installation gap.

3. The wet ball mill for lithium titanate anode material according to claim 2, characterized in that: The upper end of the anti-detachment hook is fixed with a connecting shaft, which is rotatably connected to the connecting block.

4. A wet ball mill for lithium titanate anode materials according to claim 3, characterized in that: The connecting block is provided with a pivot hole, and a pressing sleeve is slidably sleeved on the outer side of the connecting shaft. Several guide strips extend axially on the inner wall of the pressing sleeve. A guide groove that mates with the guide strips is opened on the outer wall of the connecting shaft. The pressing sleeve is rotatably connected in the pivot hole.

5. A wet ball mill for lithium titanate anode materials according to claim 4, characterized in that: A fixed ratchet ring is fixed on the inner side of the connecting block, and a movable ratchet ring is provided on the side of the pressing sleeve facing the anti-detachment hook. The fixed ratchet ring and the movable ratchet ring mesh with each other. A locking spring is connected between the anti-detachment hook and the movable ratchet ring, and a pressing button is fixed on the outer end of the pressing sleeve.

6. A wet ball mill for lithium titanate anode materials according to claim 5, characterized in that: The upper side of the anti-detachment hook is integrally formed with a protrusion, which is slidably connected to the inner side of the connecting block.

7. A wet ball mill for lithium titanate anode materials according to claim 6, characterized in that: An anti-loosening washer is fitted onto the ram screw, and the anti-loosening washer is positioned between the anti-loosening nut and the threaded sleeve.

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