Crushing device for lithium titanate negative electrode material

Abstract

The utility model provides a crushing device for a lithium titanate cathode material, and relates to the technical field of cathode material crushing, the crushing device comprises a rack and a ball-milling roller, a plurality of milling balls are placed in the ball-milling roller, an outer gear ring is arranged on the outer wall of the ball-milling roller, a mounting rack is fixed on the rack, a linkage gear is rotatably connected on the mounting rack, and the linkage gear is rotatably connected on the rack. The middle of the linkage gear is sleeved with an eccentric assembly, the eccentric assembly comprises an eccentric connecting rod, a guide shaft, a separation disc, an eccentric rod and a permanent magnet sleeve, the side, facing the linkage shaft, of the eccentric connecting rod is connected with a reciprocating lead screw, the linkage shaft is arranged on the reciprocating lead screw in a sliding and penetrating mode, and the mounting frame is provided with a reciprocating ring. A guide protrusion is arranged on the inner wall of the reciprocating ring and abuts against the interior of a threaded groove of the reciprocating lead screw in a sliding mode. According to the utility model, the permanent magnet sleeve is enabled to eccentrically move and slide left and right through the linkage gear and the reciprocating screw rod, so that the falling disorder of grinding balls can be improved, and the crushing efficiency of material cakes is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to negative material crushing technical field, concretely is a kind of lithium titanate negative material's crushing device. BACKGROUND

[0002] Novel lithium titanate is "zero tension" material, so that battery life is greatly extended, and charge-discharge cycle can reach more than several thousand times.Newly developed lithium titanate negative material and manganese lithium positive material of novel battery pack have been applied to the environmental protection green lighting system of wind-solar complementary.The negative material needs to be placed in the material box first and then put into the sintering furnace for sintering.The blocky negative material cake formed after sintering needs to be cooled and crushed to appropriate particle size for next process operation.

[0003] The rotation of the roller of the ball mill, under the action of centrifugal force, the grinding ball rotates along with the side wall of the roller, and after reaching a certain height, it falls back in the form of a parabola, and the grinding ball and the material cake are crushed and ground by mutual impact and friction between the grinding balls and the material cake.The ball mill on the market changes the falling height of the grinding ball by changing the diameter of the grinding ball, so as to increase the randomness of the grinding ball and achieve more uniform crushing effect, but as the diameter of the grinding ball decreases, the impact force will decrease, affecting the crushing effect of the material cake. UTILITY MODEL CONTENT

[0004] (I) Technical problem solved

[0005] In view of the deficiencies of the prior art, the utility model provides a kind of lithium titanate negative material's crushing device, solve the problem raised in the above background technology.

[0006] (II) Technical scheme

[0007] To achieve the above object, the utility model is realized by the following technical scheme:

[0008] A kind of lithium titanate negative material's crushing device, including rack, rotatably installed ball mill roller on the rack, a plurality of grinding balls are placed in ball mill roller, the output end of driving motor is connected with transmission mechanism, the transmission mechanism includes transmission frame, transmission shaft and transmission gear, the transmission frame is fixed on rack, the transmission shaft is rotatably connected transmission frame, the transmission shaft is connected at the output end of driving motor, the transmission gear is fixed on transmission shaft, the outer tooth ring meshing with transmission gear is provided on the outer wall of ball mill roller, the mounting bracket is fixed on the rack, the mounting bracket is covered above ball mill roller, the mounting bracket is rotatably connected with linkage gear, the middle part of linkage gear is provided with the extension linkage shaft towards ball mill roller, the eccentric assembly is sleeved on the linkage shaft.

[0009] Preferably, the eccentric assembly comprises an eccentric connecting rod, a guide shaft, a plurality of partition discs, a plurality of eccentric rods and a permanent magnet sleeve, the eccentric connecting rod is sleeved on the connecting shaft, the plurality of partition discs are connected between the eccentric connecting rod and the guide shaft, the eccentric rod is eccentrically connected between two adjacent partition discs, the permanent magnet sleeve is sleeved on the eccentric rod, and the mounting frame is fixed with a guide shaft sleeve on the downward side.

[0010] Preferably, the eccentric connecting rod is connected with a reciprocating screw rod on the side facing the connecting shaft, the reciprocating screw rod is provided with a sliding hole in the axis, the connecting shaft is slidably arranged in the sliding hole, the outer wall of the connecting shaft is provided with a guide groove extending in the axial direction, and the sliding hole is provided with a sliding strip matched with the guide groove.

[0011] Preferably, the mounting frame is provided with a reciprocating ring, and the inner wall of the reciprocating ring is provided with a guide protrusion which is in sliding abutment in the thread groove of the reciprocating screw rod.

[0012] (Three) beneficial effects

[0013] The utility model provides a kind of crushing device of lithium titanate negative electrode material. With following beneficial effects:

[0014] 1, in the utility model, the ball mill drum is rotated, the eccentric assembly is rotated on the ball mill drum by engaging driving eccentric connecting rod, the distance between permanent magnet sleeve and ball mill drum changes in the process of rotation, i.e.

[0015] 2, in the utility model, reciprocating screw rod is connected to the end of eccentric connecting rod, and is rotated synchronously with connecting gear under the limiting action of guide groove, and is slid in the thread groove of reciprocating screw rod by guide protrusion in the process of rotation, and reciprocating screw rod drives eccentric assembly to slide left and right while rotating by guide protrusion, to further increase the disorder of permanent magnet sleeve magnetic field. DRAWINGS

[0016] Fig. 1 It is the structure diagram of the utility model a kind of crushing device of lithium titanate negative electrode material;

[0017] Fig. 2 It is the sectional view of the utility model crushing device.

[0018] In the figure: 1, rack; 2, ball mill drum; 3, feed inlet; 4, grinding ball; 5, driving motor; 6, transmission gear; 7, outer tooth ring; 8, support column; 9, mounting frame; 10, support cross bar; 11, guide shaft sleeve; 12, connecting shaft; 13, connecting gear; 14, eccentric connecting rod; 15, guide shaft; 16, partition disc; 17, eccentric rod; 18, permanent magnet sleeve; 19, reciprocating screw rod; 20, reciprocating ring; 21, guide protrusion. DETAILED DESCRIPTION

[0019] The technical scheme in the utility model embodiment will be clearly and completely described below with reference to the accompanying drawings in the utility model embodiments.

[0020] The utility model embodiment provides a kind of crushing device of lithium titanate negative electrode material,

[0021] As Figs. 1-2 As shown, including rack 1, rack 1 is rotatably installed with ball mill drum 2, the one end of ball mill drum 2 is provided with drum shaft, so the shaft sleeve seat is installed on rack 1, the shaft sleeve seat is rotatably connected with drum shaft, the other end of ball mill drum 2 is provided with feed inlet 3, ball mill drum 2 is placed with several grinding balls 4, the left and right sides of rack 1 are installed with two driving motors 5, the output end of driving motor 5 is connected with transmission mechanism, transmission mechanism includes transmission frame, transmission shaft and transmission gear 6, transmission frame is fixed on rack 1, transmission shaft is rotatably connected on transmission frame, transmission shaft is connected at the output end of driving motor 5, transmission gear 6 is fixed on transmission shaft, outer tooth ring 7 that meshes with transmission gear 6 is provided on the outer wall of ball mill drum 2, driving motor 5 can make transmission gear 6 rotate, drive outer tooth ring 7 by meshing, make ball mill drum 2 whole rotation, grinding ball 4 in the inside of ball mill drum 2 rolls on the inner wall of ball mill drum 2 under the action of centrifugal force in the process of rotation, after rolling to certain height, under the action of centrifugal force, gravity and friction of grinding ball 4, with parabolic form back, grinding ball 4 and grinding ball 4, grinding ball 4 and material cake collide with each other, have reached the effect of crushing material cake.

[0022] The top end of the support column 8 is fixed with the mounting frame 9, the mounting frame 9 includes a plurality of support cross bars 10 extending along the axial direction of the ball mill drum 2, the mounting frame 9 is covered above the ball mill drum 2, the support cross bar 10 is fixed with a plurality of guide shaft sleeves 11 on the downward side, the guide shaft sleeve 11 is rotatably connected with the eccentric assembly, the eccentric assembly is slidably connected with the connecting shaft 12 on the side facing the outer tooth ring 7, the connecting shaft 12 is fixed with the connecting gear 13 on one end, the connecting gear 13 is meshed with the outer tooth ring 7, the outer tooth ring 7 rotates in the process, which makes the connecting gear 13 rotate and drives the eccentric assembly to rotate together.

[0023] The eccentric assembly comprises an eccentric connecting rod 14, a guide shaft 15, a plurality of partition discs 16, a plurality of eccentric rods 17 and a permanent magnet sleeve 18, the eccentric connecting rod 14 is sleeved on the connecting shaft 12, the plurality of partition discs 16 are connected between the eccentric connecting rod 14 and the guide shaft 15, the eccentric rods 17 are eccentrically connected between two adjacent partition discs 16, the permanent magnet sleeve 18 is sleeved on the eccentric rod 17, and the guide shaft 15 is rotatably connected through the guide shaft sleeve 11.

[0024] The eccentric connecting rod 14 is connected with a reciprocating wire rod 19 on one side facing the connecting shaft 12, the support cross rod 10 is provided with a reciprocating support rod on one side close to the outer tooth ring 7, the reciprocating support rod is provided with a reciprocating ring 20 at the lower end, the reciprocating ring 20 is sleeved on the outer side of the wire rod, and the reciprocating ring 20 and the guide shaft sleeve 11 are sleeved on the reciprocating wire rod 19 and the guide shaft 15 to play a limiting supporting role, so that the connecting gear 13 penetrating the end of the reciprocating wire rod 19 can always be engaged with the outer tooth ring 7, the inner wall of the reciprocating ring 20 is provided with a guide protrusion 21, the guide protrusion 21 is in sliding abutment in the threaded groove of the reciprocating wire rod 19, the axis of the reciprocating wire rod 19 is provided with a sliding hole, the connecting shaft 12 is slidingly penetrated in the sliding hole, the outer wall of the connecting shaft 12 is provided with an axially extending guide groove, and the sliding hole is provided with a sliding strip in recess and protrusion cooperation with the guide groove.

[0025] Further, the front and rear sides of the connecting gear 13 are provided with limiting edges, and the limiting edges are in sliding abutment on the front and rear sides of the outer tooth ring 7.

[0026] Workflow:

[0027] In the use of the novel drive motor 5, the drive motor 5 is engaged with the outer tooth ring 7 through the transmission gear 6 to drive the ball mill drum 2 to rotate, so that the grinding balls 4 in the ball mill drum 2 slide upward along the rotating direction of the ball mill drum 2 under the action of centrifugal force, and when reaching a certain height, the grinding balls 4 will fall back to the bottom of the ball mill drum 2 in the form of a parabola under the action of the suction force of the permanent magnet sleeve 18, the self-gravity of the grinding balls 4 and the centrifugal force, and in the falling process, the grinding balls 4 collide with each other and with the material cake, so that the material cake is broken and ground through impact and friction.

[0028] During the process of the grinding ball 4 falling back, the eccentric assembly can only rotate with the connecting shaft 12 and slide left and right in the horizontal direction through the limiting effect of the guide groove and the sliding groove by the meshing of the connecting gear 13 and the outer tooth ring 7. During the rotation of the eccentric assembly, the permanent magnet sleeve 18 rotates eccentrically under the action of the eccentric rod 17 with the eccentric connecting rod 14 and the guide shaft 15 as the axis, so that the permanent magnet sleeve 18 is close to and away from the ball mill cylinder 2, the attraction of the permanent magnet sleeve 18 to the grinding ball 4 is changed, the height and angle of the grinding ball 4 falling back are changed, the probability of the grinding ball 4 colliding is increased, and the reciprocating screw rod 19 drives the eccentric assembly to slide left and right relative to the transmission frame by the interaction with the guide protrusion 21. During the sliding process, the connecting gear 13 is limited in the axial direction due to the resistance of the limiting along to the front and back sides of the outer tooth ring 7, the reciprocating screw rod 19 slides on the connecting shaft 12 through the sliding hole, the eccentric assembly (the permanent magnet sleeve 18) slides left and right outside the ball mill cylinder 2, the disorder of the magnetic field of the permanent magnet sleeve 18 is increased, the disorder of the grinding ball 4 falling back is increased, the probability of the grinding ball 4 colliding is more frequent, and the crushing and grinding efficiency of the material cake is improved.

[0029] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A crushing device of a lithium titanate negative electrode material, comprising a rack, a ball mill roller is rotatably installed on the rack, and a plurality of grinding balls are placed in the ball mill roller, characterized in that: The rack is provided with a driving motor, the output end of the driving motor is connected with a transmission mechanism, the transmission mechanism comprises a transmission frame, a transmission shaft and a transmission gear, the transmission frame is fixed on the rack, the transmission shaft is rotatably connected to the transmission frame, the transmission shaft is connected to the output end of the driving motor, the transmission gear is fixed on the transmission shaft, the outer wall of the ball mill drum is provided with an outer gear ring engaged with the transmission gear, the rack is fixed with a mounting frame, the mounting frame is arranged above the ball mill drum, a connecting gear is rotatably connected to the mounting frame, the middle part of the connecting gear is provided with a connecting shaft extending towards the ball mill drum, an eccentric assembly is sleeved on the connecting shaft. 2.The breaking device of a lithium titanate negative material according to claim 1, characterized in that: The eccentric assembly comprises an eccentric connecting rod, a guide shaft, a plurality of separation discs, a plurality of eccentric rods and a permanent magnet sleeve, the eccentric connecting rod is sleeved on the connecting shaft, the plurality of separation discs are connected between the eccentric connecting rod and the guide shaft, the eccentric rods are eccentrically connected between two adjacent separation discs, the permanent magnet sleeve is sleeved on the eccentric rods, the mounting frame is fixed downward with a guide shaft sleeve, the guide shaft is rotatably connected through the guide shaft sleeve.

3. The device for crushing lithium titanate negative materials according to claim 2, characterized in that: The side of the eccentric connecting rod towards the connecting shaft is connected with a reciprocating screw rod, the axis of the reciprocating screw rod is provided with a sliding hole, the connecting shaft is slidably arranged in the sliding hole, the outer wall of the connecting shaft is provided with a guide groove extending in the axial direction, the sliding hole is provided with a sliding strip in recess and protrusion cooperation with the guide groove.

4. The crushing device of the lithium titanate negative material according to claim 3, characterized in that: The mounting frame is provided with a reciprocating ring, the inner wall of the reciprocating ring is provided with a guide protrusion, the guide protrusion is slidably arranged in the thread groove of the reciprocating screw rod.

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