JPH0321234B2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) This invention relates to a vibrating sieving device, which is lightweight and compact, even with a large capacity, and has a drive system part that is durable. The present invention relates to a vibrating sieving device that increases the

(Prior Art) A conventional vibrating sieve device has a driving portion having the structure shown below.

That is, in the first example, a motor serving as a power source is directly attached to the vibrating sieve tank, and an eccentric weight is attached to a shaft rotated by the motor to cause vibration.

In addition, in the second example, the lower surface of the vibrating sieve tank is supported by a coil spring so that it can vibrate, and a vibrating shaft with an eccentric weight is installed under the board on which the coil spring is erected. The drive shaft and vibration shaft of a certain motor are connected via an appropriate power transmission mechanism, and a coil-shaped spring joint is interposed between the power transmission mechanism and the vibration shaft to transfer the vibration of the vibration shaft to the motor, etc. This was done so that it would not be transmitted to the public.

(Problems to be Solved by the Invention) <Problems with the Prior Art> However, in the case of the first example, since the motor is directly attached to the vibrating sieve tank, the motor itself also vibrates. If this happens, the durability of the motor will decrease, so it is necessary to strengthen the structure. Therefore, the motor as a whole becomes large and heavy, which leads to problems that lead to an increase in the size of the entire device.

In the case of the second example, the motor has a structure that does not vibrate like in the first example, so a small motor can be used, but a coil spring is used to vibrate the bottom surface of the vibrating sieve tank. The structure is such that the vibration shaft is attached under the board on which the coil spring is installed, which increases the height, and furthermore, a spring joint is used to transmit the power. Therefore, if the driving force is large, there is a risk of damaging the spring joint, which poses a problem that it is not suitable for large-capacity vibrating sieving devices.

<Technical Problem> Therefore, in view of the above-mentioned problems, the present invention aims to reduce the weight and size of a vibrating sieve device so that even a large-capacity device can be made compact, and the durability of the drive system portion is increased. It was created with the problem in mind.

[Structure of the Invention] (Means for Solving the Problems) This invention provides a vibrating sieve tank that is held so as to vibrate as appropriate, a motor that is a power source for vibrating the vibrating sieve tank, and a driving rotation of the motor. It consists of a vibration transmission device that converts force into vibration and transmits it to the sieving tank. The vibration generating unit is formed from a bottomed cylindrical vibration generating case that is supported for vibration by coil springs placed on the side, and a vibration generating unit that is connected from below to the center of the vibration generating case. A cylindrical vibration shaft is inserted so as to reach the upper end or the vicinity thereof and is rotatably attached to this vibration generating case, and a cylindrical vibration shaft is attached eccentrically to this vibration shaft and vibrates by rotating. It consists of an eccentric weight and a rotating shaft that rotates the vibration shaft, the rotating shaft is loosely fitted into the vibration shaft from below and connected to the vibration shaft at the upper part, and is connected to the power transmission section at the lower part, and the rotating shaft has at least one The rotating shaft is formed to be able to swing freely relative to the power transmission section by interposing universal joints at more than one point, and furthermore, this rotating shaft is connected to the interlocking shaft that is linked by the motor by means of a spline connection. The above-mentioned problem is solved by forming the shaft to be slidable in the axial direction while transmitting force.

(Function) In the vibrating sieve device according to the present invention, as a method of vibrating the vibrating sieve tank, an eccentric weight is attached to a rotating vibrating shaft to vibrate it, and this vibrating shaft is separate from the vibrating sieving tank. A method is adopted in which the motor is rotated by the drive rotational force of a motor placed at the position.

Then, a vibration shaft is inserted into the center of the vibration generation case of the vibration generation section attached to the bottom surface of the vibrating sieve tank so as to reach from the bottom to the top end or its vicinity, and transmits the driving rotational force of the motor to the power transmission section. rotates it through the rotation axis. At this time, the vibration shaft is vibrated by an eccentric weight attached eccentrically to the vibration shaft. At this time, by loosely fitting the rotating shaft into the vibration shaft, the height of the vibration generating section in the vertical direction is made approximately equal to the length of the vibration shaft.

In addition, the vibration shaft is made into a cylinder, and the rotating shaft is loosely fitted into the cylinder so as to be connected at the upper part.Moreover, the rotational force is transmitted between the vibration shaft and the interlocking shaft that is interlocked by the motor by a spline connecting means. is formed so that it can freely slide in the axial direction while transmitting the vibration, so that it can freely move within the vibration shaft, and one or more universal joints are used to absorb rotational vibrations, and splines are used to absorb rotational vibrations. Absorbs secondary vibrations in the direction perpendicular to the rotational direction.

That way, even if the vibration shaft vibrates, the vibration will not be transmitted to the motor, which is the power source. In other words, since there are no restrictions on vibration, efficient vibration can be generated.

Then, the vibration shaft is driven and rotated by the motor, and the vibration generating section is vibrated to appropriately sieve the powder in the vibrating sieve tank.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

That is, the symbol B shown in the figure is a vibrating sieve tank, and the vibration transmitting device 1 is attached to the lower surface of this vibrating sieve tank B.

This vibration transmitting device 1 includes a vibration generating section 2 attached to the lower surface of a vibrating sieve tank B, and a power transmitting section 4 that transmits the driving rotational force of a motor 3 to the vibration generating section 2.
It is formed from.

The vibration generating section 2 is supported by an appropriate number of coil springs 5 arranged laterally so as to be able to vibrate in the lateral direction.

The vibration generating unit 2 is inserted into a bottomed cylindrical vibration generating case 6 and into the center of the vibration generating case 6 so as to reach from below to the upper end or the vicinity thereof, and is rotated with respect to the vibration generating case 6. A cylindrical vibration shaft 7 that is freely attached, and this vibration shaft 7
an eccentric weight 8 that is attached eccentrically to the vibration shaft 7 and vibrates on the vibration shaft 7 by rotating;
It consists of a rotating shaft 9 that rotates the.

The vibration generating case 6 has a flange 10 formed at its opening edge, and the flange 10 is supported by the coil spring 5.

The vibration shaft 7 is rotatably supported on the vibration generation case 6 by a bearing portion 11 formed at the upper part of the vibration generation case 6.

This bearing portion 11 connects a drive shaft 12 connected to the vibration shaft 7 with, for example, a screw, to a bearing 1.
3, the vibration shaft 7 is rotatably supported. The upper eccentric weight 8 is attached to the drive shaft 12, and the lower eccentric weight 8 is attached to the lower part of the vibration shaft 7. Further, the lower portion of the vibration shaft 7 is rotatably supported by a bearing 13 at the center of the bottom of the vibration generation case 6.

The rotating shaft 9 is loosely fitted into the vibration shaft 7 from below and connected to the vibration shaft 7 at the top, and is connected to the power transmission section 4 at the bottom, and transmits power with at least one universal joint 14 interposed therebetween. It is formed to be able to swing freely relative to the section 4.

On the other hand, the power transmission section 4 is connected to a rotating shaft 9 by a universal joint 14, and the rotating shaft 9 has a free space within a cylindrical vibration shaft 7 in order to be connected to the drive shaft 12. It is fitted.

The rotary shaft 9 is connected to an interlocking shaft 16 at the bottom by a spline 15 as a connecting means, and the rotary shaft 9 transmits rotational force to the interlocking shaft 16, but slides in the vertical direction as an axial direction. They are connected so that they can move freely and no movement force in that direction is transmitted. This interlocking shaft 16 is connected to the power transmission section 4 by the universal joint 14.
is connected to. In this case, the universal joint 14 includes all types other than those shown in the drawings, which are bendable in all directions and have rigidity in the direction of rotation.

This power transmission section 4 is arranged below a vibration generating case 6, and a pulley 1 to which a universal joint 14 connecting an interlocking shaft 15 is connected.
7 and a pulley 18 attached to the drive shaft 20 of the motor 3 are connected to be interlocked by a belt 19 that is stretched around the drive shaft 20 of the motor 3.

In addition, the reference numeral 21 in the figure is a bellows cover for preventing dirt and dust from entering, and 22 is a bearing that holds the pulley 17 rotatably.

The vibrating sieve device formed in this way transmits the rotational force from the motor 3 to the power transmission section 4 and the interlocking shaft 1.
6. The rotational shaft 9 and the drive shaft 12 are interposed, and as described above, the vibration is transmitted to the vibration shaft 7 through the universal joints 14 arranged at both ends of the rotational shaft 9 to rotate it.

Then, since the vibration shaft 7 is rotatable with respect to the vibration generating case 6, only the vibration shaft 7 rotates. At that time, since the eccentric weights 8 are eccentrically attached to the top and bottom of the vibration shaft 7, the rotational balance is lost and the vibration occurs, and the vibration force is transmitted to the vibration generation case 6, and the vibration generation case 6 itself does not rotate. It is something that vibrates.

Furthermore, during such vibrations, the vibrations caused by the vibration shaft 7 are not transmitted to the power transmission section 4 because the rotating shaft 9 can swing freely relative to the power transmission section 4 by interposing the universal joint 14. Not done. Therefore, there is no adverse effect on the motor 3, which is susceptible to vibration, and the power transmission section 4 itself also
By interposing the motor 9, vibration transmission to the motor 3 can be further blocked.

By forming the vibration shaft 7 into a cylindrical shape, into which the rotation shaft 9 is loosely fitted and connected to the rotation shaft 9 at the upper part of the vibration shaft 7, it is possible to achieve downsizing in the vertical direction, and
Since the vibration shaft 7 itself is connected to the vibration generating case 6 at the upper part, it can be further downsized in the vertical direction, and the overall size can also be inevitably reduced.

Furthermore, if at least one universal joint 14 is provided, the vibrations of the vibration shaft 7 can be blocked from being transmitted to the motor 3, but if two universal joints 14 are provided as shown in the figure, the blocking can be ensured. Transmitting power through the universal joint 14 in this way is more effective than conventional vibration isolation means using coil springs, even for large outputs. It is possible to ensure strength.

It goes without saying that the vibrating sieve device according to the present invention is not limited to the embodiments described above, and the overall structure is not limited to that shown in the drawings.

[Effects of the Invention] The present invention configured as described above includes a vibrating sieve tank B which is held so as to be able to vibrate as appropriate, and a motor 3 which is a power source for vibrating this vibrating sieve tank B.
and a vibration transmission device 1 that converts the drive rotational force of the motor 3 into vibration and transmits it to the sieve tank B. The vibration transmission device 1 includes a vibration generating section 2 attached to the bottom surface of the vibration sieve tank B; The vibration generating unit 2 is formed of a power transmitting unit 4 that transmits the driving rotational force of the motor 3 to the vibration generating unit 2. A cylindrical vibration shaft 7 is inserted into the center of the vibration generation case 6 from below to reach the upper end or the vicinity thereof, and is rotatably attached to the vibration generation case 6.
It is installed eccentrically on this vibration shaft 7,
It consists of an eccentric weight 8 that vibrates the vibration shaft 7 by rotating, and a rotation shaft 9 that rotates the vibration shaft 7.The rotation shaft 9 is loosely fitted into the vibration shaft 7 from below and is attached to the vibration shaft 7 from above. and connected to the power transmission section 4 at the lower part, with at least one universal joint 14 interposed therebetween.
The rotating shaft 9
is configured to be able to slide freely in the axial direction while transmitting rotational force between it and the interlocking shaft 16 that is interlocked by the motor 3 through a connecting means formed by a spline 15. As a result, the following effects can be achieved. play.

That is, the driving rotational force of the motor 3 is transmitted by the power transmission unit 4 to the vibration shaft 7 inserted into the center of the vibration generating case 6 from below to reach the top end or the vicinity thereof, through the rotation shaft 9. let
At this time, the vibration shaft 7 is vibrated by an eccentric weight 8 attached eccentrically to the vibration shaft 7. Then, the vibration shaft 7 is placed inside the vibration generation case 6.
Since the structure has a built-in structure, it is possible to form a sieve tank that is compact and does not take up space in the vertical direction.

Further, the vibration shaft 7 is formed into a cylinder, into which the rotation shaft 9 is loosely fitted so as to be connected at the upper part, and furthermore, a spline 15 is formed between the vibration shaft 7 and the interlocking shaft 16 which is interlocked by the motor 3. Since the connecting means is configured to be able to slide freely in the axial direction while transmitting rotational force, it can be freely moved within the vibration shaft 7, and one or more universal joints 14 are used to reduce the vibration caused by rotation. Furthermore, the splines 15 can absorb vibrations in a direction perpendicular to the direction of rotation, which are generated secondarily due to vibrations due to rotation.

In this way, even if the vibration shaft 7 vibrates, the vibration will not be transmitted to the motor 3, which is the power source. In other words, since there are no restrictions regarding vibration, there is no need to use a large anti-vibration motor for the motor 3, and a small motor 3 can be used, making it possible to reduce the overall size. Compared to the vibration absorption by coil springs, it has more rigidity in the direction of rotation, so it can withstand large driving forces. Moreover, since the rotating shaft 9 is loosely fitted into the vibration shaft 7, the structure is such that the rotating shaft 9 is built into the vibration shaft 7, and furthermore, it is built into the vibration generating case 6. This allows for size reduction in the direction.

The motor 3 drives and rotates the vibration shaft 7 to vibrate the vibration generating case 6 to appropriately sieve the powder in the vibrating sieve tank B with the vibration generating case 6 attached to the bottom surface. By adding an appropriate control device, it is possible to automatically sort the powder according to its powder size, and it can be used in various fields.

As described above, according to the present invention, a vibrating sieve device can be made lightweight and compact, even a large-capacity device can be made compact, and the durability of the drive system can be increased. It is something that plays.

[Brief explanation of drawings]

The drawing is a front sectional view of this invention. B... Vibration sieve tank, 1... Vibration transmission device, 2
... Vibration generating section, 3 ... Motor, 4 ... Power transmission section, 5 ... Coil spring, 6 ... Vibration generating case, 7 ... Vibration shaft, 8 ... Eccentric weight, 9
... Rotating shaft, 10 ... Flange, 11 ... Bearing section, 12 ... Drive shaft, 13 ... Bearing, 14
... Universal joint, 15 ... Spline, 16 ... Interlocking shaft, 17 ... Pulley, 18 ...
...pulley, 19...belt, 20...drive shaft.

Claims (1)

[Claims] 1. A vibrating sieve tank that is held so that it can vibrate as appropriate, a motor that is a power source for vibrating this vibrating sieve tank, and a vibration transmission device that converts the drive rotational force of the motor into vibration and transmits it to the sieve tank. The vibration transmission device is composed of a vibration generation section attached to the bottom surface of the vibrating sieve tank, and a power transmission section that transmits the drive rotational force of the motor to the vibration generation section. A cylindrical vibration generating case with a bottom is supported so as to vibrate freely by a coil spring, and the vibration generating case is inserted into the center of the vibration generating case from below to reach the upper end or its vicinity, and rotates with respect to the vibration generating case. The rotating shaft consists of a freely mounted cylindrical vibration shaft, an eccentric weight that is mounted eccentrically to the vibration shaft and vibrates the vibration shaft by rotating, and a rotating shaft that rotates the vibration shaft. is loosely fitted into the vibration shaft from below and connected to the vibration shaft at the top, and connected to the power transmission section at the bottom, and is oscillated relative to the power transmission section with at least one or more universal joints interposed therebetween. Furthermore, this rotating shaft is formed to be able to slide freely in the axial direction while transmitting rotational force between it and the interlocking shaft that is interlocked by the motor using a spline connecting means. Features a vibrating sieve device.