Main shaft anti-falling mechanism of wet type granulator

Abstract

A main shaft anti-falling mechanism of a wet type granulator comprises a material cylinder, a main shaft arranged in the material cylinder and a speed reducing motor used for driving the main shaft to rotate, the lower end of the main shaft extends out of the speed reducing motor and is connected with a first air cylinder through a coupling device, and the coupling device is provided with a moving plate which ascends and descends along with the main shaft. The moving plate is provided with an air cylinder support which provides guidance and allows the first air cylinder to be installed when the first air cylinder drives the moving plate to ascend and descend, and the air cylinder support is provided with a supporting unit which prevents the moving plate from descending when the moving plate ascends to the needed use height. The support unit has a preset shape that prevents the moving plate from descending and allows the moving plate to pass through by changing the preset shape when the moving plate ascends. According to the utility model, an anti-falling protection measure is provided for the main shaft after the main shaft ascends, so that the main shaft can be kept in an ascending state even if the main shaft does not have the action of an air cylinder, and therefore, the situation that the main shaft suddenly descends when the air cylinder leaks air can be effectively avoided, and the purpose of protection is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wet granulation, in particular to a main shaft anti-falling mechanism for 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) No.: CN209865972U discloses an automatic paddle lifting device for a wet granulator, including a pot body and a stirring paddle arranged in the pot body, and also including 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, 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 to push 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, but there is a defect, that is, a lack of protective measures, because the cylinder will have a risk of air leakage, and the cylinder leakage will cause the lifted main shaft to move downward, and this downward movement is sudden, resulting in the operator who is cleaning or repairing the bottom of the stirring paddle unable to respond in time, so there will be an accident of being injured by the stirring paddle, so it is necessary to set a protective measure to prevent the main shaft from falling. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings of the prior art and provides a main shaft anti-falling mechanism 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 anti-falling mechanism 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 outside the reduction motor and is connected to the first cylinder through a shaft connector, a moving plate which follows the main shaft to rise and fall is arranged on the shaft connector, a cylinder bracket which provides guidance when the first cylinder drives the main shaft to rise and fall and is installed by the first cylinder is arranged on the moving plate, a supporting unit which prevents the moving plate from falling when the moving plate rises to a required use height is arranged on the cylinder bracket, the supporting unit has a preset shape which prevents the moving plate from falling and allows the moving plate to pass through by changing the preset shape when the moving plate rises.

[0006] To be further improved, the support unit includes an outer support frame, an inner support frame, an inner gear ring, and a plurality of outer gear swing arms. The outer support frame is fixedly connected to the inner support frame. The inner support frame has an annular configuration and has a lower support plate with a configuration matching it. The inner gear ring is rotatably arranged in the inner support frame and provides lower support through the lower support plate. The outer gear swing arm is rotatably arranged on the lower support plate and distributed along the circumferential direction of the lower support plate. The outer gear swing arm is meshed with the inner gear ring and swings outward when the inner gear ring rotates counterclockwise, so as to provide lower support to the movable plate while also making the support unit present a preset shape.

[0007] For further improvement, a through hole is provided at the center of the lower support plate to allow the moving plate to pass through when the moving plate rises or falls.

[0008] Further improvement, the external tooth swing arm includes a rotating block and a support arm extending from the rotating block. The rotating block is rotatably set on the lower support plate and engages with the inner gear ring. The support arm is rotated by the rotating block so that when part of the support arm is located at the through opening, it provides lower support for the movable plate.

[0009] For further improvement, a through groove is provided on the outer circumference of the inner support frame, a connecting arm is provided on the outer circumference of the inner gear ring, and extends through the through groove to the outside of the inner support frame. The second cylinder provided on the outer support frame is hinged on the connecting arm.

[0010] For further improvement, a magnetic switch electrically connected to the second cylinder is provided between the moving plate and the inner gear ring.

[0011] The beneficial effects of the utility model are:

[0012] The utility model provides an anti-falling protection measure for the main shaft after it is raised, that is, the main shaft can maintain its raised state without the action of the cylinder, thereby effectively avoiding the main shaft from falling when the cylinder leaks, thereby achieving the purpose of protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the support unit of the utility model;

[0015] Figure 3 This is a structural schematic diagram of the support unit of the utility model in a supporting state;

[0016] Figure 4 It is a schematic diagram of the structure of the utility model after the main shaft is raised. 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 anti-fall mechanism of this wet granulator includes a cylinder 1, a main shaft 2 arranged in the 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 connected to the first cylinder 5 through a shaft connector 4. A movable plate 6 that follows the main shaft 2 to rise and fall is arranged on the shaft connector 4. The movable plate 6 is provided with a cylinder bracket 7 that provides guidance when the first cylinder 5 drives it to rise and fall and is installed for the first cylinder 5. The cylinder bracket 7 is provided with a support unit 8 that prevents the movable plate 6 from descending when the movable plate 6 rises to the required use height. The support unit 8 has a preset shape that prevents the movable plate 6 from descending and allows the movable plate 6 to pass through by changing the preset shape when the movable plate 6 rises. The principle of the utility model is that the connection between the first cylinder 5 and the main shaft 2 is realized by the shaft connector 4, so that the first cylinder 5 can be used to drive the main shaft 2 to rise or fall, and the rotation of the main shaft 2 will not be hindered. At the same time, in order to avoid the situation that the main shaft 2 suddenly falls due to leakage of the first cylinder 5 and causes harm to the operator, a movable plate 6 is arranged on the shaft connector 4, and a supporting unit 8 is arranged on the cylinder bracket 7 on which the first cylinder 5 is installed. The movable plate 6 is used as a supported component. The supporting unit 8 provides lower support for the movable plate 6 after the movable plate 6 follows the main shaft 2 to rise in height, thereby preventing the main shaft 2 from falling and maintaining the state after the lifting height. In this way, even if the first cylinder 5 leaks, the main shaft 2 will not fall, thereby achieving the purpose of protection.

[0019] The support unit 8 includes an outer support frame 81, an inner support frame 82, an inner gear ring 83, and a plurality of outer gear swing arms 84. The outer support frame 81 is fixedly connected to the inner support frame 82. The inner support frame 82 is annular in configuration and has a lower support plate 82-a with a configuration matching therewith. The inner gear ring 83 is rotatably disposed in the inner support frame 82 and provides lower support through the lower support plate 82-a. The outer gear swing arms 84 are rotatably disposed on the lower support plate 82-a and are distributed along the circumferential direction of the lower support plate 82-a. The outer gear swing arms 84 are meshed with the inner gear ring 83, and when the inner gear ring 83 rotates in a counterclockwise direction, the outer gear swing arms 84 swing outward, so as to provide lower support for the movable plate 6 while also making the support unit 8 present a preset shape. The outer support frame 81 provides External support is provided so that the inner support frame 82 is maintained at the position where the movable plate 6 needs to stop after following the rise of the main shaft 2, and the lower support plate 82-a is used to make the inner support frame 82 itself have a supporting effect, so that the inner gear ring 83 can be placed in the inner support frame 82 and can rotate. At the same time, the lower support plate 82-a is also used to set the outer gear swing arm 84, so that the outer gear swing arm 84 is close to the inner gear ring 83, so as to achieve meshing cooperation, that is, when the inner gear ring 83 rotates in the counterclockwise direction, the outer gear swing arm 84 swings outward to provide lower support for the movable plate 6, and when the inner gear ring 83 rotates in the clockwise direction, the outer gear swing arm 84 swings inward to release the lower support for the movable plate 6, so that the main shaft 2 can be lowered to its initial height.

[0020] A through hole 82-a1 is provided at the center of the lower support plate 82-a to allow the moving plate 6 to pass through when the moving plate 6 rises or falls. This arrangement facilitates the moving plate 6 to pass through the lower support plate 82-a when rising without causing any obstruction thereto.

[0021] The outer gear swing arm 84 includes a rotating block 84-a and a support arm 84-b extending from the rotating block 84-a. The rotating block 84-a is rotatably set on the lower support plate 82-a and meshes with the inner gear ring 83. The support arm 84-b is rotated by the rotating block 84-a so that when part of the support arm 84-b is located at the through opening 82-a1, it provides lower support for the moving plate 6. The rotating block 84-a is circular in configuration, which is convenient for setting meshing teeth on its outer circumference. However, considering that the support arm 84-b is also provided It is arranged on the outer circumference of the rotating block 84-a, so the meshing teeth are only arranged on part of the outer circumference, and the support arm 84-b and the rotating block 84-a are partially tangentially matched, that is, the support arm 84-b is located on the side of the rotating block 84-a, so that the rotation amplitude of the rotating block 84-a can be reduced when the support arm 84-b is extended or retracted, thereby satisfying the setting that only part of the meshing teeth are arranged on the outer circumference of the rotating block 84-a, and the support arm 84-b provides lower support for the movable plate 6 after being extended.

[0022] A through slot 82-b is provided on the outer circumference of the inner support frame 82, and a connecting arm 83-a is provided on the outer circumference of the inner gear ring 83, which passes through the through slot 82-b and extends to the outside of the inner support frame 82. The connecting arm 83-a is hinged with a second cylinder 9 arranged on the outer support frame 81, that is, the second cylinder 9 is used as a power source to drive the inner gear ring 83 to rotate. The through slot 82-b allows the connecting arm 83-a to extend to the outside of the inner support frame 82 and connect to the second cylinder 9, and the connection method is hinged, so that the output shaft of the second cylinder 9 can adapt to the rotation changes of the inner gear ring 83 during driving, and there is no interference problem. The through slot 82-b also has the effect of limiting the rotation amplitude of the inner gear ring 83, that is, its length determines the rotation amplitude, and the two ends are used as the initial end and the final end respectively, so that the contact area of ​​the outer tooth swing arm 84 with the movable plate 6 is maximized after swinging out, thereby providing the best support effect.

[0023] A magnetic switch 10 electrically connected to the second cylinder 9 is arranged between the movable plate 6 and the inner gear ring 83, that is, the magnetic switch 10 has a reed switch 101 and a permanent magnet 102, the reed switch 101 is arranged on the inner gear ring 83, and the permanent magnet 102 is arranged on the movable plate 6. In this way, after the movable plate 6 rises to the desired position, the first cylinder 5 stops running, and the second cylinder 9 starts running. When the inner gear ring 83 rotates to the position where the reed switch 101 and the permanent magnet 102 are in inductive contact, the second cylinder 9 stops running, that is, after the inner gear ring 83 rotates into place, the second cylinder 9 can stop in time without manual control.

[0024] 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 anti-falling mechanism for a wet granulator, comprising a material cylinder (1), a spindle (2) arranged in the material 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 connected to the first cylinder (5) through a shaft connector (4); the shaft connector (4) is provided with a movable plate (6) that follows the main shaft (2) to rise and fall; the movable plate (6) is provided with a cylinder bracket (7) that provides guidance when the first cylinder (5) drives it to rise and fall and is provided for the installation of the first cylinder (5); the cylinder bracket (7) is provided with a support unit (8) that prevents the movable plate (6) from descending when the movable plate (6) rises to a required use height; the support unit (8) has a preset shape that prevents the movable plate (6) from descending and allows the movable plate (6) to pass through by changing the preset shape when the movable plate (6) rises.

2. The main shaft anti-falling mechanism of the wet granulator according to claim 1, characterized in that: The support unit (8) comprises an outer support frame (81), an inner support frame (82), an inner gear ring (83), and a plurality of outer gear swing arms (84); the outer support frame (81) is fixedly connected to the inner support frame (82); the inner support frame (82) is annular in configuration and has a lower support plate (82-a) of matching configuration; the inner gear ring (83) is rotatably disposed in the inner support frame (82) and provides lower support through the lower support plate (82-a); the outer gear swing arm (84) is rotatably disposed on the lower support plate (82-a) and is distributed along the circumferential direction of the lower support plate (82-a); the outer gear swing arm (84) is meshed with the inner gear ring (83), and when the inner gear ring (83) rotates in a counterclockwise direction, the outer gear swing arm (84) swings outward, so as to provide lower support to the movable plate (6) while also allowing the support unit (8) to present a preset shape.

3. The main shaft anti-falling mechanism of the wet granulator according to claim 2 is characterized in that: A through hole (82-a1) is provided at the center of the lower support plate (82-a) to allow the movable plate (6) to pass through when the movable plate (6) rises or falls.

4. The main shaft anti-falling mechanism of the wet granulator according to claim 3 is characterized in that: The external tooth swing arm (84) includes a rotating block (84-a) and a support arm (84-b) extending from the rotating block (84-a); the rotating block (84-a) is rotatably arranged on the lower support plate (82-a) and meshes with the internal tooth ring (83); the support arm (84-b) is rotated by the rotating block (84-a) so that a part of the support arm (84-b) is located at the through opening (82-a1) to provide lower support for the movable plate (6).

5. The main shaft anti-falling mechanism of the wet granulator according to claim 2, characterized in that: A through groove (82-b) is provided on the outer circumferential surface of the inner support frame (82), and a connecting arm (83-a) is provided on the outer circumferential surface of the inner gear ring (83) and passes through the through groove (82-b) and extends to the outside of the inner support frame (82), and a second cylinder (9) arranged on the outer support frame (81) is hinged on the connecting arm (83-a).

6. The main shaft anti-falling mechanism of the wet granulator according to claim 5, characterized in that: A magnetic switch (10) electrically connected to the second cylinder (9) is provided between the moving plate (6) and the inner gear ring (83).

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