JPH0420498Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention relates to a stirring device that efficiently stirs and mixes two or more types of powder materials that require mixing operations. It is an object of the present invention to provide a stirring device capable of quickly and efficiently stirring and mixing powder materials by preventing the powder materials from forming lumps during mixing.

[Prior art]

Conventionally, when stirring and mixing two or more types of powder materials, if the powder materials become moist, some of the powder materials become small lumps during the mixing process, making it impossible to perform the stirring and mixing process smoothly. . For this reason, the powder material lumps were taken out from the mixed powder materials, crushed on a thin wire mesh and sieved, and manually mixed with the powder materials that had already been mixed. Stirring and mixing powder materials is very time-consuming and troublesome, and it is difficult to stir and mix a plurality of types of powder materials evenly and uniformly.

[Purpose of invention]

This invention eliminates the above-mentioned drawbacks and allows the stirring and mixing of powder materials to be carried out evenly and smoothly by crushing the lumps of powder materials that are generated due to moisture during the stirring and mixing of two or more types of powder materials. It is an object of the present invention to provide a stirring device that performs the following operations.

[Summary of the idea]

This idea involves installing high-speed rotating crushing blades at one or both ends of the stirring drum in the axial direction. When mixing powder materials, when some of the powder material becomes lumps due to moisture, the crushing blades remove the particles. In addition to pulverizing and mixing the work evenly and efficiently, it also prevents fine powder materials from entering the bearing that rotatably supports the drive shaft to which the pulverizing blades are attached, and the pulverizing blades are connected to the stirring drum. It is characterized by smooth high-speed rotation within the shaft.

[Example of idea]

Examples of this invention will be described below with reference to the drawings.

In Figures 2 and 3, reference numeral 1 denotes a base plate made of angle steel or the like in a rectangular frame.Both the left and right ends of this base plate 1 (in the left-right direction in Figure 2) have a planar shape. Side plates 2, 2' shaped like letters
are erected, and the bridging portions 2a,
The base plate 1 is supported on the support base 4 by providing support shafts 3 projecting outward at the center of each 2'a and pivoting the support shafts 3 to bearings 5 fixed to the upper end of the support base 4. Mounted so that it can swing freely around axis 3. 6 is each bent piece 2 at both ends of the bridge portions 2a, 2'a of the side plates 2, 2'.
b, 2b, 2'b, 2'b is a rotating shaft that is inserted rotatably in the direction perpendicular to the support shaft 3, and the ends of these rotating shafts 6 protruding from the side plates 2, 2' are , friction wheels 7, 7' are installed,
On the other hand, a pulley 8 is attached to the inside of the side plates 2, 2'. Reference numeral 9 denotes an electric motor with a reduction gear attached to the back side of the base plate 1. This electric motor 9 and the pulley 8 are connected to a belt 11 that passes through the through hole 10 of the base plate 1.
Combine at. 12 is the base plate 1 centered around the support shaft 3.
The crank mechanism includes a link 13 pivotally connected to one end of the base plate 1, an electric motor 14 with a reduction gear, and a drive shaft of the electric motor 14 fixed to the link 13. The link 15 is drivably connected to the lower end. 16
is a hollow cylindrical stirring drum rotatably mounted on friction wheels 7, 7';
7', a plurality of scraping plates 18 are arranged on the inner peripheral surface in the axial direction of the stirring drum 16, and openings 16a at both ends are provided.
Covers 19, 19a are removably attached to the housings by locking fittings 20. 21 is one opening 16a in the stirring drum 16, as shown in FIG.
The crushing device 21 is equipped with a crushing blade 22 installed in the stirring drum 16, and a drive shaft with the crushing blade 22 attached to one end and the other end connected to a motor 23. 24
, a sealing member 25 that pivotally supports this drive shaft 24 at the position of the cover 19a, a bearing member 26 that pivotally supports the drive shaft 24 outside the cover 19a, and this bearing member 26.
and a universal joint 28 for connecting the drive shaft 24 to the motor shaft 27 between the motor 23 and the motor 23. The crushing blade 22 has a rotating plate 22a and a collar 22b made of a resin having excellent heat resistance and wear resistance, and a drive shaft 24 that protrudes into the stirring drum 16 at a position close to the cover 19a inside the stirring drum 16. It is tightened with a cap nut 22c via the cap nut 22c. Further, a sealing member 25 rotatably seals the drive shaft 24 at the position of the cover 19a.
A sealing fitting 2 that has a built-in oil seal 25a that is in sliding contact with the stepped portion 24a and accommodates a lubricant that can ooze out.
By making one end of 5b protrude outward from the cover 19a and tightening the nut 25c on this protrusion,
The sealing fitting 2 is attached to the center of the cover 19a.
A minute gap S is formed between the end surface of stirring drum 5b located inside the stirring drum 16 and the rotary plate 22a, as the rotary plate 22a is received by the stepped portion 24a of the drive shaft 24. Further, a bearing member 2 rotatably supports the drive shaft 24 outside the cover 19a.
6 is a bearing housing 26 containing a bearing 26a.
A support plate 26c is welded to the outer periphery of b, and this support plate 2
6c is fixed to the outer surface of the cover 19a.
It is attached to the cover 19a by screwing the fixing bolt 26e through the collar d. The drive shaft 24, which is pivotally supported by the sealing member 25 and the bearing member 26, and the motor shaft 27 are connected via a universal joint 28, and the crushing blade 22
A motor 23 for rotating the stirring drum 16 is installed on a mounting frame 23a mounted on the side plates 2, 2' so as to surround the stirring drum 16. Reference numeral 29 denotes a partition plate that is held between the stepped portion 24a of the drive shaft 24 and the retaining ring 30 and fitted to the drive shaft 24 at an intermediate portion between the sealing member 25 and the bearing member 26; 31 is the partition plate 29; A retaining ring fixed to the inner edge of the opening end of the sealing fitting 25b corresponding to the sealing fitting 25b prevents the oil seal 25a from coming out of the sealing fitting 25b. 32 is a reinforcing frame installed between the support stands 4, 4.

Next, the operation will be explained.

Now, a plurality of types of powder materials are stored in the stirring drum 16, and the friction wheel 7 is moved by the electric motor 9.
When the stirring drum 16 is rotated through the stirring drum 7', the powdered material is scraped up by the scraping plate 18, and when it reaches a certain height, it falls down, which is repeated to mix the powder material. At this time, since the stirring drum 16 swings like a seesaw around the support shaft 3 by the crank mechanism 12 as shown by the two-dot chain line in FIG. 3, the powder material also moves back and forth in the axial direction of the stirring drum 16. The mixing operation continues repeatedly. In this case, when the powdered material becomes moist, a part of it may form into a lump and roll in the stirring drum 16 each time the stirring drum 16 swings, gradually growing into a larger lump, so the mixing operation is difficult. There were times when it became impossible to carry out the process smoothly.

However, in the stirring device of this invention, the stirring drum 1
A crushing blade 22 that is electrically driven at one end in the axial direction of 6
is installed, so when the stirring drum 16 is tilted diagonally downward on the crushing blade 22 side by the crank mechanism 12, the lumps of powder material also roll in the same direction, and in the opposite direction to the stirring drum 16. Since the powder material is crushed into powder by the high-speed rotating crushing blade 22, the powder material can be reliably stirred and mixed without forming lumps.

After mixing, one cover 19 of the stirring drum 16 is opened to discharge the powder material.

Next, when the stirring drum 16 tilts toward the crushing blades 22 during mixing of the powder materials, the powder material also moves in the same direction, and the sealing member 25 located inside the stirring drum 16 is moved by this powder material. A portion of the rotating plate 22a is buried. However, the rotating plate 22a
is attached to the drive shaft 24 with a small gap s formed between the sealing member 25 and the sealing fitting 25b, so that when the sealing fitting 25b is buried in the powder material, the small gap s is filled with the sealing fitting 25b. Although the powder material tries to enter, the powder material is removed by the wind pressure generated when the rotary plate 22a rotates at high speed and hardly enters. That is, when the rotating plate 22a is fixed,
By providing a small gap s with the sealing member 25, the high speed rotation of the rotary plate 22a tends to generate large wind pressure near this small gap s, thereby preventing the powder material from entering the small gap s. . Therefore, the oil seal 2 housed in the sealing fitting 25b
5a maintains its sealing function without being substantially damaged by the powder material. However, powder materials that require mixing range from those that are relatively soft and have a low specific gravity, such as food materials, to those that are hard and have a low specific gravity, such as powdered materials such as metal powder, ceramics, and ceramics. There are a wide variety of things, including the heaviest ones.

Therefore, when mixing soft powder materials, there is relatively little damage to the rotary plate 22a, oil seal 25a, etc., but there is a problem when mixing hard materials. That is, when the powder material is hard, if the powder material enters the small gap s between the rotary plate 22a and the sealing fitting 25b, a part of it will be discharged to the rotary plate 22a by wind pressure, but most of it will remain in the small gap. Due to this accumulated powder material, the mutually corresponding parts of the rotating plate 22a and the sealing fitting 25b gradually wear out, and the small gap s gradually becomes a large gap, and the powder material is deposited in this gap. The degree to which the particles remain will gradually increase. When this happens, the powder material is gradually pushed toward the oil seal 25a, corrodes and deteriorates the oil seal 25a, and finally leaks out from the opening of the sealing fitting 25b located outside the cover 19a. However, in this invention, the sealing member 25 and the bearing member 26 are separately attached to the drive shaft 24, and a partition plate 29 is provided between the two members 25 and 26, so that damage may occur. The powder material leaked to the outside through the gap between the oil seal 25a and the drive shaft 24 is blown off in the radial direction from the circumferential surface of the drive shaft 24 rotating at high speed, and is further removed between the sealing member 25 and the bearing member 26. In this case, the partition plate 29 fitted onto the drive shaft 24 prevents the liquid from adhering to the bearing member 26 . Therefore, there is no possibility that the leaked powder material will enter the bearing member 26 and damage the bearing 26a.

On the other hand, if the powder material leaks to the outside from the sealing member 25, the oil seal 25a is caused by the powder material.
Since the oil seal 25a is damaged, in such a case, the oil seal 25a is replaced in order to prevent powder material from leaking and to ensure smooth rotation of the drive shaft 24. For replacement, lift the stirring drum 16 vertically to separate the joint part from the universal joint 28, then release the cover 19a and remove the cover 19a from the stirring drum 16. Next, remove the cover 19a from the stirring drum 16. Remove the cap nuts 22c and the fixing bolts 26e fixing the support plate 26c, respectively.
Pull out the drive shaft 24 to the outside of the cover 19a. Next, remove the oil seal 25a remaining in the sealing fitting 25b, attach a new oil seal to the sealing fitting 25b, and pass the tip of the drive shaft 24 through the sealing member 25 again to penetrate inside the cover 19a. and fix the support plate 26c with the fixing bolt 26e.
At the same time, the crushing blade 22' is fixed to the tip of the drive shaft 24 with a cap nut 22c.

Also, when the rotary plate 22a and the sealing fitting 25b are worn out, the drive shaft 24 is covered with the cover 19 in the same manner as described above.
Just remove it from a and replace it.

In addition, in this invention, the crushing blades 22 are connected to the stirring drum 1.
Although an example has been described in which the stirring drum 16 is installed only on one side in the longitudinal direction, the stirring drum 16 may be installed on both sides of the stirring drum 16 without being limited thereto.

[Effect of idea]

Since this invention is constructed as described above, it has the following effects.

In this invention, a crushing blade is installed on one or both sides of the stirring drum, which is fixed to the tip of a drive shaft that is drivingly connected to the motor shaft, so that the stirring drum can be oscillated and rotated to mix powder materials. Even if lumps form in the powder material due to moisture, these lumps can be immediately crushed into a fine powder by the high-speed rotating grinding blades.
Stirring and mixing of powder materials can be performed evenly, smoothly, and well.

Furthermore, on the drive shaft to which the crushing blades are attached, a rotary plate made of resin with excellent heat resistance and abrasion resistance is used to seal between the crushing blades and the sealing member attached to the cover in the stirring drum. Since the sealing fitting of the sealing member is installed with a small gap between it and the rotating plate, even if the sealing fitting of the sealing member is embedded in the powder material due to the swinging of the stirring drum during mixing of the powder materials, the rotating plate and It is possible to reliably prevent powder material from entering into the small gap between the sealing metal fitting and the oil seal housed in the sealing metal fitting due to the wind pressure generated when the rotating plate rotates at high speed. It becomes possible to suppress deterioration and damage caused by material intrusion as much as possible, and as a result, it is possible to improve the sealing function of the oil seal.

Furthermore, the drive shaft to which the crushing blades were fixed was attached to the cover via a support plate at a position on the same line as the sealing member attached to the cover, and slightly away from the sealing member on the outside of the stirring drum. The drive shaft is rotatably held by a bearing member, and a partition plate is attached to the drive shaft between the bearing member and the sealing member to shield both members. Even if the oil seal of the oil seal is damaged and leaks out of the stirring drum due to intrusion of powdered material, the powdered material will be blocked by the partition plate and will not be scattered in the radial direction by the wind pressure generated by the rotation of the partition plate. Since the powder material does not enter the bearing member at all, it is possible to reliably prevent the bearing member from being damaged by the powder material and inhibiting its rotational movement.

Furthermore, the sealing fitting with a built-in oil seal allows the cover to be easily attached and removed by attaching and detaching the tightening nut, and the bearing member and crushing blade have tightening members attached to the cover and drive shaft, respectively. It is installed using
The rotary plate is attached to the drive shaft in a removable manner, so if the oil seal is damaged due to intrusion of powdered material and needs to be replaced, as described above, the crushing blades should be replaced. If the sealing member and bearing member are first released from their respective tightening members, the drive shaft can be easily removed and the sealing member disassembled, so replacing the oil seal does not require much skill or effort. It is easy to clean, and the sealing member is easy to disassemble, so even the small gap between the rotary plate and the sealing fitting can be easily cleaned.
As a result, when changing the powder material to be mixed, it is possible to prevent the quality of the mixed material from deteriorating due to the previous material remaining. Moreover, damage to the oil seal can be easily determined simply by visually confirming that the powder material has leaked out of the stirring drum.
It becomes possible to replace the oil seal at an early stage, and as a result, there is also the advantage that accidents associated with leakage of powder materials can be resolved at an early stage.

[Brief explanation of the drawing]

Fig. 1 is an enlarged vertical sectional view of the main parts of the stirring device of the present invention, Fig. 2 is a partially cutaway front view of the stirring device of the invention, Fig. 3 is a partially cutaway side view of the stirring device of the invention, and Fig. 4 FIG. 2 is a perspective view showing how the crushing blades are attached. 1... Base plate, 7, 7'... Friction wheel, 16... Stirring drum, 22... Grinding blade, 19a... Cover,
24... Drive shaft, 25... Sealing member, 25a...
Oil seal, 26...Bearing member, 27...Motor shaft.

Claims (1)

[Scope of utility model registration request] On one or both sides of the stirring drum in the longitudinal direction, which is mounted on an electrically driven friction wheel and driven and rotated by the friction wheel, a crushing blade fixed to the tip of a drive shaft that is drivingly connected to a motor shaft is attached to the stirring drum. The drive shaft, which is arranged facing inward and has the crushing blade fixed thereto, is attached to a sealing member attached to a cover that has a removably built-in oil seal and closes the opening of the stirring drum, and a sealing member attached to the cover that closes the opening of the stirring drum. , rotatably supported by a bearing member attached to a support plate attached to the cover so as to be able to co-move with the stirring drum at a position on the same line as the sealing member; A rotary plate is removably fixed to the sealing member with a small gap between the rotating plate and the sealing fitting of the sealing member, and further a sealing member protrudes outside the stirring drum of the drive shaft. A stirring device characterized in that a partition plate is installed between the end face of the tightening nut of the member and the bearing member to shield the space between the two members.