JP2004115167A - Screw type transferring/crushing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screw type transferring/crushing device economical and capable of being minimized in making the rotary speed of an internal screw and an external screw different. <P>SOLUTION: The device is equipped with the internal screw 3 forming a screw blade to a screw shaft 4 in spiral shape, and the external screw 6 which is coaxially disposed with the internal screw 3 and consists of a hollow-shaped screw blade 7 formed in spiral shape. The screw type transferring/crushing device 1 performs transferring and crushing an object to be treated, and is coaxially disposed with the internal screw 3. It has a basic sun gear 15 integrally rotating with the internal screw 3 and a basic planetary gear 16 which is engaged with the basic sun gear 15, connected with the external screw 6 and rotates the external screw 6 by the orbital motion. It is equipped with a differential speed mechanism 13 which gives the difference of the rotating speed between the internal screw 3 and the external screw 6, and the internal screw 3 and the external screw 6 are rotated with a motor M through the differential speed mechanism 13. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a screw-type transfer / crushing device that includes an inner screw and an outer screw arranged coaxially, and crushes while transferring residue by rotating with a differential speed of both screws.
[0002]
[Prior art]
As a conventional example of a screw-type transfer / crushing device, it consists of an inner screw in which screw blades are spirally formed on a screw shaft, and a hollow screw blade that is arranged coaxially with the inner screw and formed in a spiral shape. And an external screw (see, for example, Patent Document 1 and Patent Document 2).
[0003]
[Patent Document 1]
JP-A-10-139126 (page 3, FIG. 1)
[Patent Document 2]
Japanese Patent Laid-Open No. 11-106021 (page 4, FIG. 3)
[0004]
[Problems to be solved by the invention]
The above-described screw type transfer / crushing device uses the difference in rotational speed between the inner screw and the outer screw while transferring the processed matter such as residue, and the processed product when the inner screw and the outer screw cross each other in close proximity. Is sheared and crushed. Conventionally, as a means for differentiating the rotational speeds of the inner screw and the outer screw, each screw requires a drive source for rotational driving. Therefore, there has been a problem that the product cost is increased and the apparatus is increased in size.
[0005]
The present invention was created in order to solve the above-described problems, and has a simple structure and economy in making the rotational speeds of the inner screw and the outer screw different. It aims at providing the screw type transfer and crushing device which becomes possible.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides an outer screw comprising an inner screw in which screw blades are spirally formed on a screw shaft, and a hollow screw blade that is disposed coaxially with the inner screw and formed in a spiral shape. A screw-type transfer / crushing device that transfers and crushes the processed material, and is disposed coaxially with the inner screw and rotates integrally with the inner screw, A basic planetary gear that meshes with a basic sun gear and is connected to the outer screw side and rotates the outer screw by its revolving motion, and provides a rotational speed difference between the inner screw and the outer screw. A differential speed mechanism is provided, and the inner screw and the outer screw are rotated by a single drive source via the differential speed mechanism.
[0007]
Further, in the differential speed mechanism, an internal tooth that meshes with the basic planetary gear is formed, and a fixed tooth portion that is disposed so as to surround the basic planetary gear, and is interposed between the basic planetary gear and the outer screw. And a foundation pedestal that rotates integrally with the revolution movement of the foundation planetary gear.
[0008]
Further, between the foundation pedestal and the outer screw, a sun gear formed on the foundation pedestal, a planetary gear meshing with the sun gear and the fixed tooth portion, and between the planetary gear and the outer screw. And a pedestal that rotates integrally with the revolving motion of the planetary gear.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the invention will be described with reference to the drawings. 1 and 2 are an external perspective view and an explanatory side sectional view of a screw type transfer / crushing device, respectively, FIG. 3 is an enlarged explanatory view of a differential speed mechanism and a speed reduction mechanism in FIG. 2, and FIG. 4 is a basic sun gear and a basic planetary gear. FIG.
[0010]
As shown in FIG. 1, the screw-type transfer / crushing device 1 includes an inner screw 3 and an outer screw 6 that have an axial center in a casing 2 having a horizontal cross-section that is supported by a cradle 2c. They are arranged coaxially and rotatably. The casing 2 has a supply port 2a formed at the upper part on one end side and a discharge port 2b formed at the lower part on the other end side, and the processed material such as residue remaining from the supply port 2a is transferred by the rotation of each screw. While being crushed, it is discharged from the outlet 2b.
[0011]
As shown in FIG. 2, the inner screw 3 includes a screw shaft 4 and screw blades 5. The screw blade 5 is spirally formed on the screw shaft 4 of the same diameter shaft so as to have a translational component that translates the processed material toward the discharge port 2b side with respect to the rotational component in the rotational direction of the screw shaft 4 at an equal pitch. Is formed. The outer peripheral part of the screw blade 5 constitutes an outer blade part 5a.
[0012]
The outer screw 6 has an unequal pitch (as shown in FIG. 2, the pitch of the portion located directly below the supply port 2 a is formed large), and discharges the processed material with respect to the rotational component in the rotation direction. It consists only of a hollow screw blade 7 formed in a spiral shape so as to have a translational component that translates toward the side, and both ends are fixed to cylindrical support members 8 and 9. The inner peripheral portion of the screw blade 7 constitutes an inner blade portion 7a, and the outer peripheral portion constitutes an outer blade portion 7b.
[0013]
In the present embodiment, the reinforcing member 10 is attached in the screw blade 7 along the transfer direction of the processed material, that is, along the longitudinal direction of the casing 2. The reinforcing members 10 are attached, for example, at intervals of 120 degrees when viewed from the circular cross-section direction of the screw blades 7, that is, as three, and are fixed to the screw blades 7 by welding or the like so as to be spanned between the pitches of the screw blades 7. Is done. The inner peripheral surface and the outer peripheral surface of the reinforcing member 10 are connected to the inner blade portion 7a and the outer blade portion 7b of the screw blade 7 in the same plane.
[0014]
The cutting edge clearance dimension between the inner diameter of the screw blade 7 and the outer diameter of the screw blade 5 is appropriately determined depending on the properties of the object to be processed, the length of the casing 2, and the like. The inner screw 3 and the outer screw 6 described above are configured to rotate in the same direction, and therefore, the spiral winding directions of both screws are also formed in the same direction.
[0015]
When the outer screw 6 rotates at a speed of N rotations per minute, and the inner screw 3 rotates at the speed of n rotations per minute (for example, N <n) in the same direction as the rotation direction of the outer screw 6, it is inserted from the supply port 2a. While the processed product is transferred by the screw blades 5 and 7, the outer blade portion 5a of the inner screw 3 and the inner blade portion 7a of the outer screw 6 are brought close to each other due to the difference in the processed material transfer speed of the two screw blades. It is crushed and is discharged from the discharge port 2b. By arranging the inner screw 3 and the outer screw 6 coaxially, bridge formation of the processed material at the supply port 2a is prevented, and the processed material is uniformly crushed while being transferred inside the casing 2. Become. Moreover, crushing is also performed between the outer blade portion 7 b of the outer screw 6 and the inner peripheral surface of the casing 2, thereby preventing unprocessed processing from being stacked in the casing 2.
[0016]
Now, as shown in FIG. 3, the present invention is arranged so as to be coaxial with the inner screw 3 and rotates together with the basic sun gear 15. The basic sun gear 15 meshes with the basic sun gear 15 and the external screw. 6 and a basic planetary gear 16 that rotates the outer screw 6 by its revolving motion, and includes a differential speed mechanism 13 that gives a rotational speed difference between the inner screw 3 and the outer screw 6. The main feature is that the screw 3 and the outer screw 6 are rotated by a single drive source via the differential speed mechanism 13.
[0017]
A specific example of the configuration will be described below. In the inner screw 3, a drive shaft 14 is attached to the downstream end portion of the screw shaft 4 so as to extend. A motor M that rotates the drive shaft 14 is connected to the tip of the drive shaft 14. A basic sun gear 15 is attached to a portion of the drive shaft 14 near the motor M.
[0018]
In this embodiment, three basic planetary gears 16 mesh with the basic sun gear 15 at intervals of 120 degrees (see also FIG. 4). Regarding the support of the basic planetary gear 16, it is possible to roll and support the basic sun gear 15 around, for example, an arm member (not shown) rotatably attached around the drive shaft 14. An internal tooth 17 a that meshes with the basic planetary gear 16 is formed, and is supported by a fixed tooth portion 17 that is disposed so as to surround the basic planetary gear 16. The fixed tooth portion 17 has a cylindrical shape and also serves as a housing for incorporating the differential speed mechanism 13. The motor M is attached to the end of the fixed tooth portion 17 via a support bracket 18.
[0019]
Reference numeral 19 denotes a basic pedestal interposed between the basic planetary gear 16 and the outer screw 6 and connected to each basic planetary gear 16 to rotate integrally with the revolving motion of each basic planetary gear 16. . The base pedestal 19 is formed from a pair of ring-shaped basic planetary gear support plate portions 19a and 19b positioned so as to sandwich the basic sun gear 15, and from the inner peripheral edge of the basic planetary gear support plate portion 19a closer to the outer screw 6 side. The cylinder body portion 19c is formed so as to rise toward the screw 6 side. The basic planetary gear support plate portions 19a and 19b are connected to each other by connecting portions 19d disposed at intervals in the circumferential direction on the radially outer side of the basic sun gear 15.
[0020]
The base pedestal 19 is rotatably mounted around the drive shaft 14 via bearings 20 and 21 at the base planetary gear support plate part 19b and the cylindrical body part 19c, respectively. The basic planetary gear 16 is pivotally supported by a support shaft 22 spanned between the basic planetary gear support plate portions 19a and 19b.
[0021]
With the above configuration, when the motor M is driven to rotate the drive shaft 14, the inner screw 3 is rotated, the basic sun gear 15 is also rotated, and the basic planetary gear 16 is revolved around the basic sun gear 15. The base pedestal 19 rotates around the drive shaft 14. It goes without saying that the rotational speeds of the drive shaft 14 (inner screw 3) and the base pedestal 19 are different from each other due to the action of the planetary gear mechanism. Therefore, a rotational speed difference can be given between the inner screw 3 and the outer screw 6 by attaching the outer screw 6 to the base pedestal 19 via the support member 8. In FIG. 2, the end (supporting member 9) on the supply port 2a side of the outer screw 6 is pivotally supported on the casing 2 side via a bearing 23, and the inner screw 3 is a bearing 24 at the end on the supply port 2a side. Is pivotally supported by the support member 9.
[0022]
In this way, in FIG. 3, the basic sun gear 15 that is disposed coaxially with the inner screw 3 and rotates integrally with the inner screw 3 is engaged with the basic sun gear 15 and connected to the outer screw 6 side. And a basic planetary gear 16 that rotates the outer screw 6 by its revolving motion, and includes a differential speed mechanism 13 that gives a rotational speed difference between the inner screw 3 and the outer screw 6. If the screw 6 is rotated by the motor M, which is a single drive source, via the differential speed mechanism 13, when the inner screw 3 and the outer screw 6 are given different rotational speeds as in the prior art, Since each of them does not require a rotational drive source, the energy of the power can be saved, and the apparatus can be economical and downsized.
[0023]
Further, as the differential speed mechanism 13, an internal tooth 17 a that meshes with the basic planetary gear 16 is formed, and a fixed tooth portion 17 that is disposed so as to surround the basic planetary gear 16, and between the basic planetary gear 16 and the outer screw 6. And a base pedestal 19 that rotates integrally with the revolving motion of the base planetary gear 16, the differential speed mechanism 13 that has a small number of members, a simple structure, and an easy assembling work. Is realized.
[0024]
Furthermore, in this embodiment, between the base pedestal 19 and the outer screw 6, a sun gear 25 formed on the base pedestal 19, a planetary gear 26 that meshes with the sun gear 25 and the fixed tooth portion 17, and a planetary gear. A reduction mechanism 28 is provided that includes a base 27 that is interposed between the outer screw 6 and the outer screw 6 and rotates integrally with the revolving motion of the planetary gear 26.
[0025]
The sun gear 25 is formed on the outer periphery of the cylindrical body portion 19 c of the base pedestal 19, and the planetary gear 26 meshes with the sun gear 25 and the internal teeth 17 a of the fixed tooth portion 17. In this embodiment, the three planetary gears 26 are meshed at intervals of 120 degrees. The pedestal 27 is a pair of ring-shaped planetary gear support plate portions 27a and 27b positioned so as to sandwich the sun gear 25, and the inner peripheral edge of the planetary gear support plate portion 27a closer to the outer screw 6 side toward the outer screw 6 side. And a cylindrical body portion 27c formed so as to rise. The planetary gear support plate portions 27a and 27b are connected to each other by a connecting portion 27d disposed at intervals in the circumferential direction on the radially outer side of the sun gear 25.
[0026]
The pedestal 27 is rotatably attached to the drive shaft 14 and the casing 2 side via bearings 29 and 30 at the cylindrical body portion 27c. The planetary gear 26 is pivotally supported by a support shaft 31 spanned between the planetary gear support plate portions 27a and 27b. The outer screw 6 is connected to the cylinder body portion 27 c via the support member 8.
[0027]
With the above configuration, when the base pedestal 19 rotates around the drive shaft 14 by driving the motor M as described above, the rotational speed of the outer screw 6 is reduced by the reduction mechanism of the planetary gear mechanism including the sun gear 25 and the planetary gear 26. Decelerated. Therefore, a differential speed is generated between the inner screw 3 and the outer screw 6, and a processed material such as a residue is efficiently crushed. Thus, between the base pedestal 19 and the outer screw 6, the sun gear 25 formed on the base pedestal, the planetary gear 26 meshing with the sun gear 25 and the fixed tooth portion 17, the planetary gear 26 and the outer screw. 6 and a base 27 that rotates integrally with the revolving motion of the planetary gear 26 and is provided with a speed reduction mechanism 28, so that the inner screw 3 and the outer screw 6 can be connected with a simple structure. The rotation speed difference can be set large.
[0028]
The preferred embodiment of the present invention has been described above. In the form described, the screw blades 5 of the inner screw 3 are set at an equal pitch, but may be set at unequal pitches. Conversely, the screw blades 7 of the outer screw 6 may be set at an equal pitch. In addition, the layout, shape, and the like of each component are not limited to those described in the drawings, and the present invention can be appropriately changed in design without departing from the spirit thereof.
[0029]
【The invention's effect】
According to the present invention, when different rotational speeds are given to the inner screw and the outer screw, there is no need for a rotational drive source for each, so that the apparatus can be made economical and downsized.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a screw type transfer / crushing apparatus.
FIG. 2 is an explanatory side sectional view of a screw type transfer / crushing apparatus.
FIG. 3 is an enlarged explanatory view of a differential speed mechanism and a speed reduction mechanism in FIG. 2;
FIG. 4 is a schematic external perspective view of a basic sun gear and a basic planetary gear.
[Explanation of symbols]
M motor (drive source)
DESCRIPTION OF SYMBOLS 1 Screw type transfer and crushing device 3 Inner screw 4 Screw shaft 5 Screw blade 6 Outer screw 7 Screw blade 13 Differential speed mechanism 15 Basic sun gear 16 Basic planetary gear 17 Fixed tooth portion 17a Internal tooth 19 Basic pedestal 25 Sun gear 26 Planetary gear 27 Pedestal 28 Reduction mechanism

Claims (3)

An inner screw having a screw shaft spirally formed on the screw shaft, and an outer screw having a hollow screw blade disposed coaxially with the inner screw, and transferring the processed material And a screw type transfer / crushing device for crushing,
A basic sun gear that is coaxially arranged with the inner screw and rotates integrally with the inner screw, meshed with the basic sun gear and connected to the outer screw side. A basic planetary gear that rotates, and a differential speed mechanism that gives a rotational speed difference between the inner screw and the outer screw,
A screw type transfer / crushing device characterized in that the inner screw and the outer screw are rotated by a single drive source through the differential speed mechanism. The differential speed mechanism has an internal tooth that meshes with the basic planetary gear, and is interposed between a fixed tooth portion disposed around the basic planetary gear, the basic planetary gear, and the outer screw. The screw-type transfer / crushing device according to claim 1, comprising a foundation pedestal that rotates integrally with the revolution of the foundation planetary gear. Between the base pedestal and the outer screw,
A sun gear formed on the base pedestal;
A planetary gear meshing with the sun gear and the fixed tooth portion;
The reduction mechanism provided with the base interposed between this planetary gear and the said external screw, and rotating integrally with respect to the revolving motion of this planetary gear was provided. Screw type transfer and crushing equipment.

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