Main shaft lifting device of wet type granulator

Abstract

A main shaft lifting device of a wet type granulator comprises a material cylinder, a main shaft arranged in the material cylinder and a gear motor used for driving the main shaft to rotate, the lower end of the main shaft extends out of the gear motor and is provided with an installation groove, two bearings distributed in the height direction of the installation groove are arranged in the installation groove, and fixing shafts in shaft connection with the bearings are arranged on the bearings. The lower end of the fixing shaft extends out of the mounting groove and is provided with a connecting seat, the connecting seat is provided with a moving plate and is in threaded connection with an air cylinder, and the moving plate is provided with an air cylinder support which provides guidance and allows the air cylinder to be mounted when the air cylinder drives the moving plate to ascend and descend. The air cylinder has the advantages that when the air cylinder is maintained, the air cylinder can be removed only by rotating the connecting base, the threads have guidance quality, and when the connecting base rotates, the main shaft can be driven to move upwards through guidance of the threads, so that the output shaft of the air cylinder is gradually retreated from the connecting base; and the main shaft does not rotate under the action of the bearing, so that quick disassembly is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of wet granulation, in particular to a main shaft lifting device of a wet granulator. Background Art

[0002] Wet granulator is used to grind wet powder into required granules, and also to crush block dry materials into required granules. The general use process of wet granulator is as follows: mix the required materials, start the machine, pour the mixed materials into the bucket, and the swinging action of the rotating drum squeezes the materials through the screen to form granules.

[0003] Publication (announcement) number: CN209865972U discloses an automatic paddle lifting device for a wet granulator, comprising a pot body and a stirring paddle arranged in the pot body, and also comprising a lifting cylinder, a main shaft and a pot body support frame. The pot body support frame is supported at the bottom of the pot body, and the lifting cylinder is connected to one end of the main shaft through a main shaft connecting assembly, and the other end of the main shaft passes through the pot body support frame and is connected to the stirring paddle. This automatic paddle lifting device applies an upward thrust to the main shaft through the lifting cylinder, pushing the stirring paddle up, so that the stirring paddle of the wet granulator can be automatically lifted to a specified height for cleaning or repairing the bottom of the stirring paddle. However, there are defects, which are mainly reflected in the connection method between the main shaft and the driving shaft of the lifting cylinder. The main shaft and the driving shaft of the lifting cylinder are connected through a main shaft connecting assembly (i.e., a coupling), and part of the main shaft, the main shaft connecting assembly, and the driving shaft of the lifting cylinder are all located in the reducer support frame. This method makes it cumbersome to disassemble the cylinder when air leakage or other failures that affect its normal use occur, that is, the coupling needs to be disassembled in advance, and then the connection between the coupling and the cylinder is released. In addition, the coupling and the driving shaft of the cylinder adopt a plug-in fit that will produce a tight fit, so it is necessary to use auxiliary tools such as a rubber hammer to apply force before releasing it. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings of the prior art and provides a main shaft lifting device for a wet granulator to solve the above-mentioned problems.

[0005] The utility model adopts a technical solution to solve the technical problem: the main shaft lifting device of the wet granulator comprises a material cylinder, a main shaft arranged in the material cylinder, and a reduction motor for driving the main shaft to rotate, the lower end of the main shaft extends to the outside of the reduction motor and is provided with a mounting groove, two bearings distributed along the height direction of the mounting groove are arranged in the mounting groove, a fixed shaft connected to the shaft is arranged on the bearing, the lower end of the fixed shaft extends to the outside of the mounting groove and is provided with a connecting seat, a moving plate is arranged on the connecting seat and is threadedly connected with a cylinder, and a cylinder bracket is arranged on the moving plate for providing guidance and for installing the cylinder when the cylinder drives the main shaft to rise and fall.

[0006] Further improvement, the mounting groove includes a bearing mounting portion, and a fixed shaft mounting portion integrally formed with the bearing mounting portion, both bearings are placed in the bearing mounting portion and tightly fit with the bearing mounting portion, and the fixed shaft is placed in both the bearing mounting portion and the fixed shaft mounting portion and tightly fits with the fixed shaft mounting portion.

[0007] For further improvement, a shaft seal connected to the main shaft and used to prevent the bearing from separating from the bearing mounting portion is arranged on the fixed shaft.

[0008] To be further improved, the shaft seal includes an insert block and a stopper integrally formed with the insert block, the insert block is placed in the bearing mounting portion and abuts against one of the bearings, the stopper abuts against the lower end of the main shaft when the insert block is placed in the bearing mounting portion, and both the insert block and the stopper are provided with an axial hole for the fixed shaft to pass through.

[0009] To be further improved, the bearing mounting portion is provided with a socket on the main shaft, and a threaded hole communicating with the socket is provided on the plug block, and the socket guide bolt extends to the threaded hole and cooperates with the thread of the threaded hole.

[0010] To be further improved, the fixed shaft includes a main shaft rod and a partition block integrally formed with the main shaft rod, two bearings are arranged on the main shaft rod and symmetrically distributed on both sides of the partition block, and the lower end of the main shaft rod is arranged in the connecting seat.

[0011] To be further improved, the connecting seat includes an upper connecting plate and a lower connecting head integrally formed with the upper connecting plate, the upper connecting plate is used to set the main shaft rod and is connected to the movable plate by bolts, and the lower connecting head is used to set the movable plate and is threadedly connected to the output shaft of the cylinder.

[0012] The beneficial effects of the utility model are:

[0013] The utility model can be released by rotating the connecting seat only when maintaining the cylinder, and the thread itself has a guiding property. When the connecting seat rotates, the guiding of the thread can be used to drive the main shaft to move upward, so that the output shaft of the cylinder gradually withdraws from the connecting seat, and under the action of the bearing, the fixed shaft will not drive the main shaft to rotate when rotating, thereby realizing quick disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the main shaft of the utility model;

[0016] Figure 3 It is a partial structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings:

[0018] Referring to the accompanying drawings: the main shaft lifting device of the wet granulator comprises a material cylinder 1, a main shaft 2 arranged in the material cylinder 1, and a reduction motor 3 for driving the main shaft 2 to rotate, the lower end of the main shaft 2 extends to the outside of the reduction motor 3 and is provided with a mounting groove 21, two bearings 4 distributed along the height direction of the mounting groove 21 are arranged in the mounting groove 21, a fixed shaft 5 connected to the shaft is arranged on the bearing 4, the lower end of the fixed shaft 5 extends to the outside of the mounting groove 21 and is provided with a connecting seat 6, a movable plate 7 is arranged on the connecting seat 6 and a cylinder 8 is threadedly connected, and a cylinder bracket 9 is provided on the movable plate 7 for providing guidance and installation of the cylinder 8 when the cylinder 8 drives it to rise and fall. The principle of the utility model is that the bearing 4, the fixed shaft 5, and the connecting seat 6 constitute a main shaft connecting assembly connecting the main shaft 2 and the output shaft of the cylinder 8, and the output shaft of the cylinder 8 is connected to the connecting seat 6 by a threaded connection. In this way, when the cylinder 8 has an air leakage or other failure that affects its normal use, it only needs to rotate the connecting seat 6 to release it, and the thread itself has a guiding property. When the connecting seat 6 rotates, the main shaft 2 can be driven to move upward by the guiding of the thread, so that the output shaft of the cylinder 8 gradually withdraws from the connecting seat 6, and under the action of the bearing 4, the fixed shaft 5 will not drive the main shaft 2 to rotate together when it rotates, thereby realizing quick disassembly. The movable plate 7 is arranged on the connecting seat 6 in a plug-in manner, which is mainly for cooperating with the movement of the cylinder bracket 9, so that the cylinder 8 can increase the driving stability when driving the main shaft 2 to move upward.

[0019] The mounting groove 21 includes a bearing mounting portion 21-a and a fixed shaft mounting portion 21-b integrally formed with the bearing mounting portion 21-a. Both bearings 4 are placed in the bearing mounting portion 21-a and are tightly matched with the bearing mounting portion 21-a. The fixed shaft 5 is placed in the bearing mounting portion 21-a and the fixed shaft mounting portion 21-b at the same time and is tightly matched with the fixed shaft mounting portion 21-b. Such an arrangement enables the mounting groove 21 to simultaneously adapt to the bearing 4 and the fixed shaft 5, and to achieve tight match with the bearing 4 and the fixed shaft 5. The tight match between the bearing mounting portion 21-a and the bearing 4 enables the bearing 4 to rotate with the main shaft 2 when the main shaft 2 rotates, thereby avoiding slippage between the main shaft 2 and the bearing 4. The tight match between the fixed shaft 5 and the fixed shaft mounting portion 21-b is used to increase the installation stability of the fixed shaft 5. Both the bearing mounting portion 21-a and the fixed shaft mounting portion 21-b are circular grooves, and there is a difference in the inner diameter size between the two, thereby forming a step configuration, that is, the step configuration is used to form an upper end constraint on the bearing 4 located above.

[0020] A shaft seal 10 is provided on the fixed shaft 5 and is connected to the main shaft 2 and is used to prevent the bearing 4 from detaching from the bearing mounting portion 21-a. The shaft seal 10 is used to seal the slot 21, and the bearing 4 is completely confined in the slot 21, preventing the bearing 4 from detaching from the inlet end of the slot 21 when the main shaft 2 is driven to descend.

[0021] The shaft seal 10 includes an insert block 101 and a stop block 102 integrally formed with the insert block 101. The insert block 101 is placed in the bearing mounting portion 21-a and abuts against one of the bearings 4. The stop block 102 abuts against the lower end of the main shaft 2 when the insert block 101 is placed in the bearing mounting portion 21-a. The insert block 101 and the stop block 102 are both provided with an axial hole 20 for the fixed shaft 5 to pass through. In this way, the shaft seal 10 has a part (i.e., the insert block 101) whose outer diameter matches the bearing mounting portion 21-a, and also has a part (i.e., the stop block 102) whose outer diameter matches the main shaft 2. In this way, while closely fitting with the mounting groove 21, the shaft seal 10 also maintains good integrity with the main shaft 2.

[0022] The bearing mounting portion 21-a is provided with a socket 21-a1 on the main shaft 2, and the plug block 101 is provided with a threaded hole 101-a which is interconnected with the socket 21-a1. The socket 21-a1 guide bolt extends to the threaded hole 101-a and is threadedly engaged with the threaded hole 101-a. Considering that the close fit between the plug block 101 and the bearing mounting portion 21-a can only maintain temporary stability, this arrangement is used to stably set the shaft seal 9 on the main shaft 2, and also to prevent the bearing 4 from detaching from the mounting groove 21.

[0023] The fixed shaft 5 includes a main shaft rod 51 and a partition block 52 integrally formed with the main shaft rod 51. The two bearings 4 are both arranged on the main shaft rod 51 and are symmetrically distributed on both sides through the partition block 52. The lower end of the main shaft rod 51 is arranged in the connecting seat 6. Such an arrangement enables the two bearings 4 to be symmetrically distributed on both sides, and can quickly confirm the setting positions of the two bearings 4 on the main shaft rod 51, and meet the installation requirements of the shaft seal 10. The step configuration formed between the partition block 52 and the shaft seal 10 and the mounting groove 21 forms upper and lower end constraints on the two bearings 4, which can generate sufficient extrusion force to ensure the stable setting of the bearings 4.

[0024] The connecting seat 6 includes an upper connecting plate 61 and a lower connecting head 62 integrally formed with the upper connecting plate 61. The upper connecting plate 61 is used to set the main shaft rod 51 and is connected to the movable plate 7 by bolts. The lower connecting head 62 is used to set the movable plate 7 and is threadedly connected to the output shaft of the cylinder 8. The upper connecting plate 61 is connected to the movable plate 7 by bolts, which can increase the positioning of the connecting plate 7 on the connecting seat 6 without affecting the displacement. When maintaining the cylinder 8, the rotation constraint of the connecting seat 6 can be released by removing the bolts. The lower connecting head 62 is used to be threadedly connected to the output shaft of the cylinder 8, thereby meeting the quick disassembly requirements of the cylinder 8 and the connecting seat 6.

[0025] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A spindle lifting device for a wet granulator, comprising a cylinder (1), a spindle (2) arranged in the cylinder (1), and a reduction motor (3) for driving the spindle (2) to rotate, characterized in that: The lower end of the main shaft (2) extends to the outside of the reduction motor (3) and is provided with a mounting groove (21), and two bearings (4) are arranged in the mounting groove (21) and are distributed along the height direction of the mounting groove (21), and a fixed shaft (5) connected to the shaft of the bearing (4) is arranged on the bearing (4), and the lower end of the fixed shaft (5) extends to the outside of the mounting groove (21) and is provided with a connecting seat (6), and a movable plate (7) is arranged on the connecting seat (6) and is threadedly connected with a cylinder (8), and a cylinder bracket (9) is arranged on the movable plate (7) for providing guidance when the cylinder (8) drives it to move up and down and for installing the cylinder (8).

2. The main shaft lifting device of the wet granulator according to claim 1, characterized in that: The mounting groove (21) comprises a bearing mounting portion (21-a) and a fixed shaft mounting portion (21-b) integrally formed with the bearing mounting portion (21-a); the two bearings (4) are both placed in the bearing mounting portion (21-a) and are tightly matched with the bearing mounting portion (21-a); the fixed shaft (5) is simultaneously placed in the bearing mounting portion (21-a) and the fixed shaft mounting portion (21-b) and is tightly matched with the fixed shaft mounting portion (21-b).

3. The main shaft lifting device of the wet granulator according to claim 2, characterized in that: The fixed shaft (5) is provided with a shaft seal (10) which is connected to the main shaft (2) and is used to prevent the bearing (4) from being separated from the bearing mounting portion (21-a).

4. The main shaft lifting device of the wet granulator according to claim 3, characterized in that: The shaft seal (10) comprises an insert (101) and a stopper (102) integrally formed with the insert (101); the insert (101) is placed in the bearing mounting portion (21-a) and abuts against one of the bearings (4); the stopper (102) abuts against the lower end of the main shaft (2) when the insert (101) is placed in the bearing mounting portion (21-a); and both the insert (101) and the stopper (102) are provided with an axial hole (20) for the fixed shaft (5) to pass through.

5. The main shaft lifting device of the wet granulator according to claim 4, characterized in that: The bearing mounting portion (21-a) is provided with a socket (21-a1) on the main shaft (2), and the insert block (101) is provided with a threaded hole (101-a) which is interconnected with the socket (21-a1), and the socket (21-a1) guides the bolt to extend to the threaded hole (101-a) and to be threadably matched with the threaded hole (101-a).

6. The main shaft lifting device of the wet granulator according to claim 1, characterized in that: The fixed shaft (5) comprises a main shaft rod (51) and a partition block (52) integrally formed with the main shaft rod (51); the two bearings (4) are both arranged on the main shaft rod (51) and symmetrically distributed on both sides of the partition block (52); and the lower end of the main shaft rod (51) is arranged in the connecting seat (6).

7. The main shaft lifting device of the wet granulator according to claim 6, characterized in that: The connecting seat (6) comprises an upper connecting plate (61) and a lower connecting head (62) integrally formed with the upper connecting plate (61); the upper connecting plate (61) is used to set the main shaft rod (51) and is connected to the movable plate (7) via bolts; the lower connecting head (62) is used to set the movable plate (7) and is threadedly connected to the output shaft of the cylinder (8).

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