JPH10128732A - Bearing device for stirring shaft in stirring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a stirring shaft from blurring of rotation and to keep sure rotation by mounting a conical projected part at the apex of a shaft being relatively rotated to a conical recessed part formed on one end face of the stirring shaft and energizing by pressing the shaft in the stirring shaft direction. SOLUTION: A stirring shaft 24 is connected with in such a way that one end is connected to a power side and another end is connected with a bearing side and on the power side, one end is projected from an opening part 27 in the wall face of a stirring, tank 13. On the bearing side, one end of the stirring shaft 24 is inserted into the bearing part 33 and a conical recessed part 34 is formed on one end face of the bearing part 33. In addition, a shaft 41 is passed through from an opening part 35 on the wall face 13 of the stirring tank 13 in the inner direction in such a way that it can not rotate in the circumferential direction and it can move forward and backward in the shaft direction. The shaft 41 is moved in the stirring shaft 24 direction by energizing of a pressing spring 46 in such a way that the conical projected part 42 of the shaft 41 is brought into tight contact with the conical recessed part 34 and the stirring shaft 24 is surely supported on the shaft 41. As the conical recessed part 34 and the conical projected part 42 are smoothly rotated while they are brought into contact with each other by feeding grease, wearing caused by friction is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to cement, gypsum,
The present invention relates to a stirring shaft bearing device in a stirrer for stirring a soil, other powder raw materials, water, other liquid raw materials, and the like to form a stirrer.

[0002]

2. Description of the Related Art Conventionally, in a stirring apparatus for introducing and stirring a powder material such as cement, gypsum, earth, and other powders, and water and other liquid materials, a stirring device disposed in a stirring tank (1). axis
In (2), as shown in FIG. 5, one is connected to the power side and the other is connected to the bearing side. On the power side, one end of the stirring shaft (2) protrudes from the stirring tank (1) to the outside, and this protruding portion is connected to a power unit (not shown). And the stirring shaft (2) and the stirring tank
A soft elastic packing (3) made of rubber or resin is attached to the contact portion with (1), and the agitated material enters the power unit through the gap between the stirring shaft (2) and the stirring tank (1). Prevents intrusion.
Further, in order to supply grease to a rotating contact portion between the stirring shaft (2) and the packing (3), a grease inlet (5) is connected to the rotating contact portion via an introduction path (4). ing. On the bearing side, one end of the stirring shaft (2) is rotatably inserted into a cylindrical bearing (6) projecting into the stirring tank (1).

When the stirring shaft (2) formed as described above is rotated inside the stirring tank (1) into which the stirring material is introduced, on the power side, the stirring shaft (2) is moved around the inner periphery of the packing (3). In the bearing side, the stirring shaft (2) is rotated in the circumferential direction while contacting the
It rotates while touching the inner circumference of. By this rotation, a stirring member (7) such as a screw provided on the stirring shaft (2) is rotated, and the stirred material is stirred.

[0004]

In the above state, the stirring shaft (2)
When stirring, the soft-elastic packing (3) is mounted on the power side, and grease is supplied to the rotating contact portion. It is difficult to prevent wear of the rotating contact portion.

On the bearing side, a stirring shaft (2) and a bearing portion
The rotating contact part with (6) rotates while generating a frictional force, and the rotating contact part between the stirring shaft (2) and the bearing part (6) is arranged in the stirred material in the stirring tank (1). Therefore, the agitated material enters the rotating contact portion. When the agitated material is cement or the like, the rough particles serve as an abrasive and wear the agitating shaft (2) and the bearing (6). When the gap between the stirring shaft (2) and the bearing portion (6) increases, the bearing portion (6) cannot reliably support the stirring shaft (2), and the stirring shaft (2) on the bearing side. The rotation of
A burden is imposed on the rotation of (2). Therefore, replacement of the bearing (6) and the stirring shaft (2) is required in a short period of time.

[0006] In addition, the rotation of the stirring shaft (2) on the power side also fluctuates due to the movement of the stirring shaft (2) on the bearing side.
A load is applied to the rotating contact portion between (2) and the packing (3). Then, the agitation shaft (2) and the packing (3) are strongly rubbed against each other and are worn, and a gap is generated in the rotating contact portion. The agitated material enters the gap, and the agitated material becomes abrasive,
(3) and the stirring shaft (2) were further worn. Due to the wear of the rotating contact portion, the agitated material enters the power portion,
Because it may cause a failure of this power unit,
It was necessary to replace the packing (3) in a short period of time.

Further, in order to reduce wear on the bearing side, grease is supplied to a rotating contact portion between the stirring shaft (2) and the bearing portion (6) to smooth the rotation and reduce the frictional force. It is known that the agitated material is less likely to penetrate into the gap between the rotating contact portions due to an oil film, but it can only slightly delay the progress of wear.

[0008] As described above, in the conventional bearing device, even a small amount of wear may hinder the rotation of the stirring shaft. Therefore, it is necessary to always check the worn state, and it is necessary to frequently replace worn parts. That made maintenance work expensive and cumbersome.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and ensures that the stirring shaft of the stirring tank can be securely rotated even if a part of the rotating contact portion on the bearing side is worn. The stirrer shaft is supported to suppress the fluctuation of the rotation of the stirring shaft. Further, by preventing the rotation of the bearing from rotating, the progress of wear of the component at the power-side rotating contact portion is delayed, and the durability of the component is improved to enable long-term use. Then, it is possible to reduce the inspection work and the replacement work of the parts. Further, by preventing the rotation of the stirring shaft from being blurred, the stirring ability is stabilized, and good stirring of the stirring object is enabled.

[0010]

According to the present invention, in order to solve the above-mentioned problems, a conical concave portion is formed on one end surface of a stirring shaft disposed in a stirring tank, and the conical concave portion is relatively formed with the conical concave portion. A shaft on which a conical convex portion at the tip is rotatably mounted is formed, and this shaft is penetrated through a support fixed to the stirring tank so as to be non-rotatably movable forward and backward, and the shaft is moved in the stirring shaft direction by a biasing means. It is made by pressing.

According to a second aspect of the present invention, a conical conical convex portion is formed on one end surface of a stirring shaft disposed in a stirring tank, and the conical concave portion at the tip of the conical convex portion is relatively rotatably rotatable. Is formed, and this shaft is penetrated through a support fixed to the stirring tank so as to be non-rotatable and able to advance and retreat, and the shaft is pressed and urged in the direction of the stirring shaft by a biasing means. .

The urging means for the shaft is provided with a pressing spring at a distance between an engaging portion of the fixed body having one end fixed to the support and an engaging receiving portion protruding from the shaft closer to the support than the engaging portion. It may be formed by mounting.

[0013] The shaft may be provided with a grease inlet at the outer end so that grease can be supplied to the contact surface between the conical concave portion and the conical convex portion through a passage penetrating through the central portion in the axial direction.

The shaft may be provided with a key groove in the direction of the outer peripheral axis, and a key formed on a fixed body may be fitted into the key groove.

[0015]

Since the present invention has the above-mentioned structure,
Cement-based, gypsum-based, soil, and other powdered raw materials, water, and other liquid raw materials are introduced into a stirring tank. Then, when the stirring shaft arranged inside the stirring tank is rotated, the stirring shaft rotates in the circumferential direction to generate a flow, and the stirred object is stirred.

Further, the stirring shaft is reliably supported by a shaft which is non-rotatably penetrated by a support fixed to the stirring tank, and rotates stably. When the stirring shaft rotates, the conical recess formed on one end surface of the stirring shaft also rotates integrally.However, since the shaft mounted on the conical recess cannot rotate, the conical recess and the conical convex portion of the shaft are not rotated. rub against. Due to this friction and contact with the agitated material, the agitated material enters the rotating contact portion between the conical concave portion and the conical convex portion, and wear of the rotating contact portion occurs.

In the present invention, no gap is formed in the rotating contact portion due to the wear of the rotating contact portion. Conventionally, a gap has been formed in the rotating contact portion, making it impossible to reliably support the stirring shaft with the bearing portion, and the rotation of the stirring shaft has been blurred. However, in the present invention, since the shaft is pressed and urged in the direction of the stirring shaft by the urging means, the shaft slides in the direction of the stirring shaft by the amount of wear, so that the shaft always keeps the stirring shaft fixed. It will be supported by. Also, the shape of the conical concave portion and the conical convex portion does not become inconsistent due to wear. That is, since the conical concave portion and the conical convex portion have a conical shape, even if abrasion occurs, the contact relationship between the two is reliably maintained.

Therefore, the abrasion of the conical convex portion progresses so that the conical concave portion becomes too short to slide in the direction of the stirring shaft, or the abrasion of the conical concave portion progresses and the diameter of the bottom surface becomes larger than the diameter of the shaft.
As long as the two cannot be brought into contact with each other, the shaft reliably supports the stirring shaft and the center of the stirring shaft can be extended. Therefore, even if the rotating parts are worn, they can be used for a long period of time, and there is no need to frequently replace parts as in the conventional case. Further, the stirring ability is improved by the stable rotation of the stirring shaft.

As described above, the stirring shaft is reliably supported on the bearing side, and stable rotation can be obtained, thereby preventing the rotation of the stirring shaft on the power side. The wear of the rotating contact portion with the seal is suppressed, and the packing can be used for a long period of time.

Further, in the second invention, on the bearing side,
One end surface of the stirring shaft protrudes conically to form a conical convex portion,
The tip of the shaft is conically recessed to form a conical recess. The conical concave portion of the shaft is fitted with the conical convex portion of the stirring shaft so as to be relatively rotatable. Even in this case, even if the rotating contact portion between the conical concave portion and the conical convex portion is worn, no gap is formed in the rotating contact portion, and the shaft reliably supports the stirring shaft, and the stable rotation of the stirring shaft is achieved. And the same effect as that of the first invention can be obtained.

The urging means for the shaft is provided with a pressing and pressing member at an interval between an engaging portion of the fixed body having one end fixed to the support and an engaging receiving portion protruding from the shaft closer to the support than the engaging portion. The shaft can always be pressed in the direction of the stirring shaft in accordance with the wear of the shaft and the stirring shaft. Therefore, even if abrasion occurs, the conical concave portion and the conical convex portion are always in contact with each other, and the shaft can reliably support the stirring shaft.

Further, the shaft is provided with a grease inlet at the outer end, and is formed so as to be able to supply grease to a contact surface between the conical concave portion and the conical convex portion through a passage penetrating through the central portion in the axial direction. Then, by the action of the grease, the conical concave portion and the conical convex portion rotate while smoothly contacting each other.
It is possible to reduce wear of the rotating contact portion due to friction. Further, the grease is filled in the rotating contact portion between the conical concave portion and the conical convex portion, so that the agitated material hardly enters the rotating contact portion. Therefore, the wear of the rotating contact portion is further suppressed, and the durability of the rotating component is improved.

Further, the shaft is provided with a key groove in an outer peripheral axis direction, and if a key formed on a fixed body is fitted into the key groove, the shaft is reliably prevented from rotating in the circumferential direction. Is possible, and even if the stirring shaft in contact with the shaft rotates, the shaft does not rotate together.

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment in which a bearing device of the present invention is used in a bearing portion of a stirrer screw in a reservoir device of a cement mixer truck.
(11) shown in FIGS. 3 and 4 is a reservoir device, which is a mixer section (12) in which a cylindrical main body is arranged in a horizontal direction, and a box-shaped stirring tank arranged below the mixer section (12).
(13). In the mixer section (12),
The powdered raw material and the liquid raw material are mixed and stirred to form an agitated product (14). In the agitating tank (13), the agitated material is supplied from the mixer (12).
After receiving (14), the mixture is cured and stirred.

A hopper (15) for supplying a powdery raw material is connected to one end of the mixer section (12). The hopper (15) is provided with a wide opening (16) for charging a powder material, and a silo screw
(17) is provided so that the powdery raw material input from the input port (16) can be quantitatively conveyed to the mixer section (12).
Further, a mixer screw (18) is provided inside the mixer section (12) in the longitudinal direction of the cylinder so that the powder raw material conveyed from the hopper (15) and the liquid raw material sent from the outside can be mixed. .

Further, the mixer screw (18) and the silo screw (17) are respectively arranged in a horizontal direction, and both are integrally connected and formed. Then, the mixer section (1
These can be integrally rotated in the circumferential direction by the power of a hydraulic motor (19) installed outside of (2). The other end of the mixer section (12) has a pipe-shaped outlet.
(21), and through this outlet (21), a stirring tank (13)
The stirrer (14) can be discharged to the mouth (22) of the container.

As shown in FIG. 3, the stirring tank (13) expands the outlet (21) side of the mixer section (12) in a hopper shape from the center to the upper side, and expands the opening section ( 23)
To facilitate the introduction of the agitated material (14). Also,
At the lower part of the stirring tank (13), a stirring shaft (24) as a stirrer screw is provided in parallel with the mixer screw (18). The stirring shaft (24) is rotatable in the circumferential direction by the power of a hydraulic motor (25) installed outside the stirring tank (13).
(14) can be agitated for curing.

As shown in FIG. 1, a pair of spiral screw blades (26) are formed on the outer periphery of the stirring shaft (24), and when the stirring shaft (24) rotates in the circumferential direction. The screw blade (26) rotates to generate a flow. When the pair of screw blades (26) form a helical direction symmetrically, the flow due to the rotation of the screw blades (26) occurs not only in one direction but also in directions opposite to each other. In this embodiment, the opposite flow is caused by the stirring tank.
It is formed in such a direction as to occur from both ends of (13) toward the center.

One of the stirring shafts (24) is connected to the power side, and the other is connected to the bearing side. On the power side, one end of the stirring shaft (24) is connected to an opening provided on the wall surface of the stirring tank (13).
(27) and is connected to a hydraulic motor (25). In addition, a packing (28) is attached to the rotating contact portion of the stirring shaft (24).
And the stirring shaft (24) is rotatable around the inner periphery of the packing (28). By the interposition of the packing (28), the stirring material is supplied from the stirring tank (13) side to the rotating contact portion and the power portion.
(14) is prevented from entering.

Further, a grease inlet (31) is provided on the outer peripheral portion of the packing (28), and the inlet (31) is connected to the rotating shaft of the stirring shaft (24) and the packing (28). , Introduction path
By connecting via (32), grease can be supplied to the rotating contact portion. Therefore, the grease is
The rotation friction between the (24) and the packing (28) is reduced, and the rotation is smooth. Further, grease is interposed in a rotating contact portion between the stirring shaft (24) and the packing (28), thereby preventing the agitated material from entering the rotating contact portion.

On the bearing side, one end of the stirring shaft (24) is inserted into a cylindrical bearing portion (33), fixed with screws (not shown), and arranged in a stirring tank (13). I have. And the bearing
One end of (33) is conically recessed to form a conical recess (34). Also, on the bearing side, an opening (35) is opened in the wall surface of the stirring tank (13), and the support (38) is bolted (37) to the flange (36) formed outside the opening (35). Engagement is fixed. The support (38) has a through hole (39).
And a cylindrical shaft (41) is penetrated from the outside of the stirring tank (13) to the inside so that it cannot rotate in the circumferential direction and can advance and retreat in the axial direction. The tip of the shaft (41) penetrating into the stirring tank (13) forms a conical convex portion (42) by projecting in a conical shape, and this conical convex portion (42) is formed into a bearing portion. The conical concave portion (34) of (33) is relatively rotatably mounted.

Further, the shaft (41) can be pressed and urged in the direction of the stirring shaft (24) by the urging means. As shown in FIGS. 1 and 2, the urging means fixes a fixed body (43) to a support (38) in parallel with the shaft (41).
An engaging portion (44) is fixed to the outer periphery of (43), and this engaging portion (4) is fixed.
4) on the outer periphery of the shaft (41) closer to the support (38) than
The engagement receiving portion (45) protrudes. Then, the engaging portion (44)
And a pressing ridge (46) is interposed at the interval between the engagement receiving portion (45) and
The urging force of the pressing bar (46) presses the engagement receiving portion (45), and the shaft (41) slides in the direction of the stirring shaft (24). By this sliding, the conical convex portion (4) of the shaft (41) is
2) comes into close contact with the conical concave portion (34) of the bearing portion (33), so that the shaft (41) securely supports the stirring shaft (24).

As shown in FIG. 1 and FIG.
A key groove (47) is provided in the outer periphery of (41) in the axial direction from the outer end, and a key (48) is provided in the engaging portion (44).
By fitting the key (48) to the (47), the shaft (4)
1) can move back and forth in the direction of the stirring shaft (24), but cannot rotate in the circumferential direction. Shaft (41) as above
And the stirring shaft (24), even if the stirring shaft (24) rotates, the shaft (41) does not rotate together, and the conical convex portion is formed.
The conical concave portion (34) makes strong rotational contact with (42).

The shaft (41) is provided with a grease inlet (49) at an outer end thereof and penetrates a grease inlet (51) at a central portion in the axial direction. And the entrance
Grease can be supplied from (49) to the rotary contact surface between the conical concave portion (34) and the conical convex portion (42) via the introduction path (51). By supplying this grease, the conical recess
(34) and the conical convex portion (42) rotate while making smooth contact with each other, so that wear of the rotational contact portion due to friction can be reduced, and the agitated material (14) is placed on the rotational contact portion. It is possible to make it difficult to invade.

As shown in FIG. 3, a transfer screw for transferring the agitated material (14) is provided at the lower bottom of the agitation tank (13).
(52) is provided, and a discharge pump (53) is connected to the transfer screw (52) so that the agitated material (14) inside the agitation tank (13) can be discharged to the outside. Incidentally, in this embodiment, a snake pump is used as the discharge pump (53). However, as long as the agitated material (14) can be discharged to the outside, not only a snake pump but also a squeeze type pump or the like may be used, and a pump having appropriate specifications according to the type and properties of the raw material may be used. Can be. The transfer screw (52) is also rotatable by a hydraulic motor (54) provided outside the stirring tank (13).

The reservoir device (11) formed as described above.
As shown in FIG. 4, a cement mixer body (55)
It is loaded and used. This mixer truck body (55) is equipped with a reservoir (11), a cement tank (56) containing cement as a powder raw material, and a water tank (57) containing water as a liquid raw material. I have. And screw conveyor in cement tank (56)
A transfer cylinder (58) containing (not shown) is installed, and the screw conveyor conveys the cement in the cement tank (56) to the input port (16) of the hopper (15) of the reservoir device (11). doing. And this input port (1
From 6), the cement is put into the hopper (15).
Then, the cement put into the hopper (15) is quantitatively conveyed to the mixer section (12) by the silo screw (17).

The water tank (57) is provided with a water pump (not shown), and the water pump quantitatively transports water to the mixer section (12). Further, the mixer section (12) is provided with a water amount adjusting valve (not shown) to adjust the amount of water transported from the water pump so that the agitated material can be stirred.
The viscosity of (14) is adjusted. Then, the mixer section (1
When the cement and water conveyed in 2) are mixed and stirred by the rotation of the mixer screw (18), a semi-liquid agitated substance (14) is formed. Thus, the mixer section
By stirring the mixture in (12) to obtain a semi-liquid agitator (14) having a certain viscosity, the agitator (14) can be easily agitated in the agitation tank (13), and the agitation efficiency is improved. It will improve.

Then, the agitated material (1) formed as described above
4) a stirring tank from the outlet (21) of the mixer section (12)
It is discharged to the mouth (22) of (13). This discharge is caused by the rotation of the siloscrews (17) and the cement
Since the material is conveyed continuously to (12), the pressure of this conveyance causes the agitated material (14) to be pushed out toward the discharge port (21). Then, immediately below the discharge port (21) is a hopper-shaped expanding portion (23), so that the discharged agitated material (14) passes through the inclined surface of the expanding portion (23). It is filled inside the stirring tank (13).

After the stirring vessel (13) is filled with the stirring material (14) and the stirring shaft (24) is rotated, the stirring shaft (24) is rotated.
The agitator (14) is caused to flow by the screw blade (26) spirally connected to the (24), and the agitator (14) is stirred. The spiral direction of the screw blade (26) of the stirring shaft (24) is arranged so that this flow is generated from both ends of the stirring tank (13) toward the center. Therefore, the stirrer
While the (14) is being stirred by the flow, it is conveyed to the center from both ends of the stirring tank (13), and the stirred material collected in the center is
(14) is pressed upward and downward of the stirring tank (13), and flows again to both ends. As described above, since a large convection is generated in the stirring tank (13), the agitated material (14) is not biased in the stirring tank (13) and the stirring efficiency is good as compared with the case where the flow is generated in one direction. Becomes

On the bearing side, the contact between the conical concave portion (34) of the bearing portion (33) and the conical convex portion (42) of the shaft (41) ensures that the stirring shaft (24) is securely connected to the shaft (41). , Which enables stable rotation without blurring. The shaft (41) cannot rotate due to the fitting of the key groove (47) and the key (48), and is pressed and urged in the direction of the stirring shaft (24) by the pressing ridge (46). When the stirring shaft (24) rotates, the conical concave portion (34) and the conical convex portion (4) are rotated.
2) rubs against each other. In addition, the conical concave portion (34) and the conical convex portion (4)
Since the rotating contact portion with 2) is in contact with the stirring object (14), the stirring material (14) enters the rotating contact portion.
Therefore, the agitated material (14) becomes an abrasive, and friction causes wear of the rotating contact portion.

Conventionally, due to the wear of the rotating contact portion, a gap is formed in the rotating contact portion between the stirring shaft (2) and the bearing portion (6), and the rotation of the stirring shaft (2) is blurred. . However, in the bearing device of the present invention, no gap is formed in the rotating contact portion due to wear. That is, even if the conical concave portion (34) and the conical convex portion (42) were worn by friction, the shaft (41) was pressed and urged in the direction of the stirring shaft (24) by the pressing ridge (46), causing abrasion. The shaft (41) slides in the direction of the stirrer shaft (24) by the distance. Further, since the conical concave portion (34) and the conical convex portion (42) have a conical shape, even if abrasion occurs, their shapes do not become inconsistent, and the contact relationship is reliably maintained. in this way,
Since there is no gap in the rotating contact portion and the contact relationship is maintained, the shaft (41) always and surely supports the stirring shaft (24), and the rotation of the stirring shaft (24) is shaken. Will be prevented.

Further, since the grease is constantly supplied to the rotating contact portion between the conical concave portion (34) and the conical convex portion (42), smooth rotation is performed, and friction due to the rotating contact is reduced. It becomes possible. Further, the contact relationship between the rotating contact portions is reliably maintained by the pressing force, and no gap is formed, and the agitated material (14) hardly enters the rotating contact portion due to the oil film of the grease. Therefore, it is possible to delay the wear of the rotating contact portion due to friction and the intrusion of the stirring object (14), and it is possible to improve the durability of the rotating component.

As described above, the conical concave portion (34) and the conical convex portion
Even if the wear of (42) progresses considerably, the shaft (41) reliably supports the stirring shaft (24), and the center of the stirring shaft (24) can be extended. Therefore, even if the rotating parts are worn,
Long-term use is possible, and there is no need to perform frequent inspections or replace parts as compared with the related art. In addition, since the rotation of the stirring shaft (24) is performed stably,
The stirring capacity of the reservoir device (11) in which (24) is arranged is also improved.

In addition, by reliably supporting the stirring shaft (24) on the bearing side and projecting the center of the stirring shaft (24), the rotation of the stirring shaft (24) does not fluctuate even on the power side. .
Grease is also supplied to the rotating contact portion between the packing (28) and the stirring shaft (24) on the power side, so that the contact is smooth and the agitation material (14) enters the rotating contact portion. Is preventing. Therefore, abrasion of the packing (28) and the stirring shaft (24) is suppressed, and the packing (28) lasts long and does not need to be replaced frequently. Further, due to the stable rotation of the stirring shaft (24), no load is applied to the hydraulic motor (25), and the durability of the power is improved.

As described above, when the agitated material (14) is sufficiently agitated, the transfer screw (5) provided at the lower bottom of the agitation tank (13) is used.
By rotating 2) and transferring the curing cement to the discharge pump (53) connected to the transfer screw (52),
High quality curing cement can be discharged from the discharge pump (53).

In the above embodiment, the conical concave portion (34) is formed in the bearing portion (33) of the stirring shaft (24), and the shaft (41) is formed.
As a second invention, a conical convex portion is formed by projecting one end surface of the bearing portion (33) in a conical shape, and the tip of the shaft (42) is formed in a conical shape. May be recessed to form a conical recess. Then, the conical convex portion of the bearing portion (33) is rotatably mounted on the conical concave portion of the shaft (42). Also in this case, even if the rotating contact portion between the conical concave portion and the conical convex portion is worn, the shaft (42) is pressed and urged to maintain the contact relationship, and the shaft (42) securely connects the stirring shaft (24). , The rotation of the stirring shaft (24) can be stably performed, and the same effect as the above-mentioned invention can be obtained.

In the above embodiment, the bearing device of the present invention is used for the bearing portion of the stirring shaft (24). However, the bearing portion of the mixer screw (18) of the mixer section (12) and the cement tank ( It can also be used for the bearing part of the screw conveyor of 56), the bearing part of the transfer screw (52), and the like. Since the rotating contact portions of these bearing portions are also in contact with the agitated material, cement powder, and the like, these enter the rotating contact portions and become abrasives, causing wear of the rotating components. I was Therefore, by using this bearing device, wear of the rotating parts can be prevented, and the mixer screw (18), the screw conveyor, the transfer screw
The durability of (52) can be improved. Further, the present invention can be applied not only to a mixer truck but also to various machines equipped with a stirring shaft, such as a stationary mixer device.

In the above embodiment, the silo screw
(17) and mixer screw (18), stirring shaft (24),
The transfer screw (52) is a hydraulic motor (19) (25)
Although it is rotating at (54), it may be rotatable by appropriate rotating means such as an electric motor or a small engine.

In the above embodiment, the pressing ridge (46) is used as the pressing urging means for the shaft (41).
An air cylinder, a hydraulic cylinder, or the like may be used as long as the pressure can be applied, and the same effects as those of the pressing spring (46) can be obtained.

[0050]

As described above, the present invention is constructed as described above. Therefore, even if the bearing portion is worn out, the rotation of the stirring shaft is prevented and the rotation of the stirring shaft is reliably maintained even if the bearing portion is worn. It is possible to do. For this reason, even if the bearing part is slightly worn, it is not necessary to frequently replace the rotating part. In addition, since the rotation of the bearing is prevented on the bearing side, it is possible to make the parts of the rotating contact portion on the power side hard to wear. Therefore, it is possible to improve the durability of the rotating part and reduce the inspection work and the replacement work of the part.

Further, by preventing the rotation of the stirring shaft from rotating, the stirring ability is stabilized, so that good stirring of the stirring object can be achieved. Further, by improving the stirring ability, the stirring time of the stirring object can be shortened, and the wear of the rotating parts can be further prevented.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a bearing portion.

FIG. 2 is a side view of a bearing.

FIG. 3 is a sectional view of one embodiment of a reservoir device using the bearing device of the present invention.

4 is a side view in which the reservoir device of FIG. 3 is mounted on a mixer truck main body.

FIG. 5 is a sectional view of a conventional bearing device.

[Explanation of symbols]

 13 Stirring Tank 24 Stirring Shaft 34 Conical Recess 38 Support 41 Shaft 42 Conical Convex 43 Fixed Body 44 Engagement Part 45 Engagement Reception Part 46 Pressing Emission 47 Key Groove 48 Key 49 Inlet

Claims (5)

[Claims] 1. A conical conical concave portion is formed on one end surface of a stirring shaft disposed in a stirring tank, and a shaft on which a conical convex portion at a tip is relatively rotatably mounted is formed in the conical concave portion. ,
This shaft is penetrated through a support fixed to the stirring tank so as to be non-rotatable so as to advance and retreat, and the shaft is pressed and urged in the direction of the stirring shaft by a biasing means. Bearing device. 2. A conical convex portion is formed on one end surface of a stirring shaft arranged in a stirring tank, and a shaft is formed on the conical convex portion, to which a conical concave portion at a tip is relatively rotatably mounted. And
This shaft is penetrated through a support fixed to the stirring tank so as to be non-rotatable so as to advance and retreat, and the shaft is pressed and urged in the direction of the stirring shaft by a biasing means. Bearing device. 3. The urging means of the shaft is provided with a pressing and pressing member at an interval between an engagement portion of the fixed body having one end fixed to the support and an engagement receiving portion protruding from the shaft closer to the support than the engagement portion. The stirrer shaft bearing device in the stirrer according to claim 1 or 2, wherein the stirrer shaft is formed by interposing. 4. The shaft is provided with a grease inlet at an outer end thereof, and is capable of supplying grease to a contact surface between the conical concave portion and the conical convex portion via a passage penetrating through the central portion in the axial direction. 3. A stirring shaft bearing device in the stirring device according to claim 1, wherein 5. The stirring shaft according to claim 1, wherein the shaft has a key groove in an outer peripheral axis direction, and a key formed on a fixed body is fitted into the key groove. Bearing device.