JP2016055227A - Vibrating sieve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tilting type vibrating sieve capable of reducing the weight of the main part of an exciter and the driving power of a driving source.SOLUTION: In the tilting type vibrating sieve, an exciter 8 includes a main part 9 existing in a movable frame 2 and being installed at an almost center part in a width direction orthogonal to the transfer direction of an object and a motor 10 installed at a base part 3 side as a driving source. The main part 9 is provided with a drive shaft 12 for extending in the width direction of the movable frame 2, being positioned in the width of the movable frame 2, having a pair of eccentric weights 18 and being rotated by the motor 10 together with the eccentric weights 18.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a tilting type vibration sieving machine.

  In the tilt type vibration sieving machine, a main part of a vibration generator for vibrating the movable frame is installed in a movable frame having a screen portion. The main body portion of the vibration generator includes a vibration rotation shaft extending in the width direction of the movable frame. The rotating shaft for vibration is supported rotatably by bearings provided on both sides in the width direction of the movable frame, and both end portions protrude to the outside of the movable frame, and eccentric weights are provided at both end portions. It is installed. A motor serving as a drive source is installed on the base portion side that elastically supports the movable frame, and a belt and a pulley are provided between the rotation shaft of the motor and one end portion of the excitation rotation shaft. A belt transmission mechanism using-is provided. When the rotating shaft for excitation is rotated in one direction together with the eccentric weight by a motor via a belt transmission mechanism, a vibration force is generated in the main portion due to a swinging load of the eccentric weight, and the movable frame is moved by the vibration force. It is configured to vibrate and move in an inclined direction while the object on the screen portion is shaken.

Registered Utility Model No. 30465504

  In the tilt-type vibrating screen having such a configuration, the rotating shaft for vibration, which is the main part of the vibration generator, is longer than the width of the movable frame, and an eccentric weight is provided outside the movable frame. It has been. For this reason, the rotating shaft for vibration is long and heavy. In addition, bearings that support the vibration generating rotation shaft in a freely rotatable manner are required on both the left and right sides of the movable frame, but the bearings must be strong and heavy to support the heavy vibration rotating shaft. The main part of the vibration generator becomes heavy. Along with this, the eccentric weight needs to be heavy. Thus, in the thing of the conventional structure, since the weight of the main part of a vibration generator is large, there exists a subject that the drive electric power of the motor used as the drive source of a vibration generator will also become large.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a tilting type vibration sieving machine capable of reducing the weight of the main part of the vibration generator and reducing the driving power of the driving source.

  The present invention comprises a movable frame having a screen portion that is elastically supported by a base portion and shakes an object in response to vibration, and a vibration generator that vibrates the movable frame, and the screen portion is in an inclined state. In the tilting type vibration sieving machine configured to move the object on the screen portion in a tilting direction as the movable frame is vibrated by the vibration generating device, the vibration generating device includes: A main body part installed in a substantially central part in a width direction perpendicular to the transfer direction of the object in the movable frame, and a drive source installed on the base part side, and the main body part Has a pair of eccentric weights extending in the width direction of the movable frame and positioned within the width of the movable frame, and provided with a rotating shaft for excitation that is rotated together with the eccentric weight by the drive source. Yes.

  In the main body portion of the vibration generator, a pair of eccentric weights provided on the vibration rotation shaft is contained within the width of the movable frame. For this reason, the rotating shaft for vibration generation can be shortened compared to the conventional one, and the weight can be reduced accordingly. Along with this, it is possible to reduce the weight of the bearing and the eccentric weight that rotatably support the vibration generating rotary shaft, and the main part of the vibration generating device can be reduced in weight. Accordingly, it is possible to reduce the driving power of the driving source in the vibration generator.

Front view of the tilting vibrating screen according to the present embodiment Right side view The top view which shows schematic structure of the main part of a vibration generator The figure seen from the arrow X4 direction in FIG. Sectional view of the main part of the vibration generator

  Hereinafter, an embodiment of an inclined vibration sieve according to the present invention will be described with reference to the drawings. First, in FIG. 1 and FIG. 2, the movable frame 2 having the screen portions 1A and 1B has a rectangular shape that is long in the left-right direction in FIG. Elastically supported. In this case, the screen portions 1A and 1B have two stages in the vertical direction in a parallel state, and are arranged in a downwardly inclined state. The inclination angle of the screen portions 1A and 1B is about 20 degrees. As shown in FIG. 2, the screen portions 1A and 1B are each formed by a screen mesh, and the mesh of the lower screen portion 1B is set slightly smaller than the mesh of the upper screen portion 1A. In this case, the moving direction of the object on the screen portions 1 </ b> A and 1 </ b> B during the operation of the vibration sieve machine is the direction of arrow A in FIG.

  At the upper part of the movable frame 2, there are provided mounting plates 6 that are positioned in the middle part in the longitudinal direction and project upward on both sides in the width direction perpendicular to the longitudinal direction. The main body mounting base 7 is provided in a fixed state. The main body mounting base 7 has its mounting surface 7a inclined downwardly in FIG. 1 so as to follow the upper surface of the movable frame 2, and the main body mounting base 7 has a main body of the vibration exciter 8 at substantially the center of the mounting surface 7a. Part 9 is installed. Therefore, the main body portion 9 of the vibration generator 8 is provided at the upper portion of the movable frame 2 and at a substantially central portion in the width direction orthogonal to the arrow A direction, which is the direction in which the object is transferred.

  The vibration generator 8 is for vibrating the movable frame 2 and thus the screen portions 1A and 1B, and includes a main body portion 9 and a motor 10 serving as a drive source. The motor 10 is provided in a fixed state on a motor mounting base 11 provided in the base portion 3 and positioned in the vicinity of one mounting plate 6. The motor 10 has the rotating shaft 10a facing the mounting plate 6 side.

  Next, the main body 9 will be described with reference to FIGS. The main body portion 9 includes a vibration rotating shaft 12 that extends in the width direction of the movable frame 2. The vibration rotating shaft 12 passes through a bearing case 14 provided in a fixed state on the mounting surface 7 a of the main body mounting portion 7 in the axial direction, and is provided with a pair of left and right side portions of the bearing case 14. It is rotatably supported via a bearing 16 (see FIG. 5). Each bearing 16 is called a taper bearing in this case, and is covered with a cap 17 from the outside.

  A pair of eccentric weights 18 are attached to the excitation rotating shaft 12 so as to rotate integrally with the excitation rotating shaft 12 so as to be positioned on the outside protruding from the left and right caps 17. Therefore, the pair of eccentric weights 18 of the vibration generating rotary shaft 12 are accommodated within the width of the movable frame 2. The end portion on the motor 10 side of the vibration generating rotary shaft 12 is connected to one end portion of the intermediate shaft 19 via a rubber coupling 20 having a known configuration. As shown in FIG. 5, the rubber coupling 20 is formed in a ring shape between a connecting portion 21 fixed to the end portion of the excitation rotating shaft 12 and a connecting portion 22 fixed to one end portion of the intermediate shaft 19. In this case, the rotation of the intermediate shaft 19 is transmitted to the exciting rotation shaft 12 side.

  The other end of the intermediate shaft 19 passes through the mounting plate 6 on the motor 10 side and protrudes toward the motor 10, and the motor 10 rotates through the rubber coupling 20 having the same configuration as the rubber coupling 20. It is connected to the shaft 10a (see FIG. 2). Therefore, when the rotating shaft 10a of the motor 10 is rotated, the rotation is transmitted to the exciting rotating shaft 12 via the rubber coupling 20, the intermediate shaft 19, and the rubber coupling 20, and the exciting rotating shaft 12 is thereby transmitted. Is rotated in the same direction as the rotary shaft 10a.

In FIG. 1, the left upper portion of the movable frame 2 when viewed from the front is used as a loading port 29, and the object to be screened is loaded from the loading port 29 onto the screen 1 </ b> A. In the vibrating screen, the main body 9 portion of the vibration generator 8 is usually covered with a detachable cover 30 as shown by a two-dot chain line in FIG. 2, and the main body 9 portion is inspected and repaired. In the above configuration, when the operation of the motor 10 is started, the rotation of the rotating shaft 10a is rotated for vibration through the rubber coupling 20, the intermediate shaft 19, and the rubber coupling 20. The vibration rotating shaft 12 is transmitted to the shaft 12 and rotated in one direction integrally with the eccentric weight 18. At this time, the position of the eccentric weight 18 that rotates integrally with the rotating shaft 12 for vibration changes while rotating, and the direction of the swinging load generated from the eccentric weight 18 changes. Due to this swinging load, vibration of circular motion is generated in the main body 9, this vibration is transmitted to the movable frame 2, and the screen portions 1 </ b> A and 1 </ b> B are also vibrated. Accordingly, the object thrown on the screen portion 1A is sequentially transferred in the direction of arrow A which is the transfer direction while being shaken by the vibration, and the object dropped from the mesh of the screen portion 1A is the screen portion 1B. Are sequentially transferred in the direction of the arrow A while being shaken.

According to the above-described embodiment, the following operational effects can be obtained.
In the main body portion 9 of the vibration generator 8, a pair of eccentric weights 18 provided on the vibration rotation shaft 12 are accommodated within the width of the movable frame 2. For this reason, the rotating shaft 12 for vibration generation can be accommodated within the width of the movable frame 2, the length can be shortened compared to the conventional one, and the weight can be reduced accordingly. Accordingly, it is possible to reduce the weight of the bearing 16 and the eccentric weight 18 that rotatably support the vibrating shaft 12, and the main portion 9 of the vibrating device 8 can be reduced in weight. Along with this, it becomes possible to reduce the drive power of the motor 10 which is a drive source in the vibration generator 8.

  In this case, since the motor 10 that is the drive source of the vibration generator 8 is fixed to the motor mount 11 provided on the base portion 3 on the fixed side, the motor 10 is not easily subjected to vibrations generated by the main body portion 9. As much as possible, it is possible to prevent a decrease in the service life. In addition, since the rubber coupling 20 is used to transmit the rotation between the rotating shaft 10a of the motor 10 and the exciting rotating shaft 12, the vibration on the exciting rotating shaft 12 side is more difficult to be transmitted to the motor 10 side. There are advantages that can be made, and maintenance of the connecting portion can be facilitated.

  Incidentally, in the configuration in which the rotation of the rotation shaft of the motor is transmitted to the rotating shaft 12 for vibration through a belt transmission mechanism using a belt and a pulley, foreign matter easily enters between the belt and the pulley. If it enters, troubles such as the belt coming off or the belt or pulley being damaged are likely to occur. On the other hand, by using the rubber coupling 20 as in the present embodiment, it is possible to make it difficult for such a problem to occur.

  Here, as a conventional technology, a double-shaft type motor in which both ends of the rotating shaft protrude outside the machine is used as the vibration generator, and eccentric weights are provided at both ends of the rotating shaft of the motor. It has been. This vibration generating device is installed on the movable frame, and the rotating shaft on which the eccentric weight is mounted is rotated to generate vibration. In this configuration, the vibration generator can be accommodated within the width of the movable frame and can be made compact. However, since the motor itself of the vibration generator vibrates, there is a problem that the load on the motor is large and the life of the motor is likely to be reduced. In addition, the motor is a special motor, and the motor is expensive, and the vibration generator is expensive.

  In this regard, according to the present embodiment, as described above, the load applied to the motor 10 is small, and the life of the motor 10 can be extended. Moreover, as the motor 10, the normal thing which the rotating shaft 10a protruded to one side can be used, and the comparatively cheap motor 10 with versatility can be used.

  In the present embodiment, the intermediate shaft 19 is interposed between the rotating shaft 10 a of the motor 10 and the exciting rotating shaft 12, and the rubber coupling 20 is provided at both ends of the intermediate shaft 19. This makes it possible to shorten the length of the vibration generating rotary shaft 12 as much as possible. Moreover, as the motor 10, the thing with the normal length of the rotating shaft 10a can be used.

In the above-described embodiment, the intermediate shaft 19 is interposed between the rotation shaft 10a of the motor 10 and the excitation rotation shaft 12. However, the intermediate shaft 19 is not interposed and the rotation shaft 10a and the excitation rotation are not interposed. A configuration in which the shaft 12 is directly connected by one rubber coupling 20 is also possible.
In the movable frame 2, the screen portion is not limited to two stages, and can be applied to only one stage or three or more stages.

  The present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications without departing from the scope of the invention.

  In the drawings, 1A and 1B are screen portions, 2 is a movable frame, 3 is a base portion, 7 is a main body mounting base, 8 is a vibration generator, 9 is a main body portion, 10 is a motor (drive source), and 11 is motor mounting. A base, 12 is a rotating shaft for vibration, 16 is a bearing, 18 is an eccentric weight, 19 is an intermediate shaft, and 20 is a rubber coupling.

Claims (2)

A movable frame having a screen portion that is elastically supported by the base portion and shakes the object in response to vibration, and a vibration generator that vibrates the movable frame, and the screen portion is disposed in an inclined state. In addition, in the tilting type vibration sieving machine configured to transfer the object on the screen portion in the tilting direction while vibrating the movable frame by the vibration generator,
The vibration generator includes a main body portion installed at a substantially central portion in a width direction perpendicular to the transfer direction of the object in the movable frame, and a drive source installed on the base portion side. Prepared,
The main body includes a vibration rotating shaft that extends in the width direction of the movable frame and has a pair of eccentric weights positioned within the width of the movable frame and is rotated together with the eccentric weights by the drive source. Vibration sieve machine.   2. The vibration sieving machine according to claim 1, further comprising a rubber coupling that transmits rotation of the drive source to the excitation rotation shaft between the drive source and the excitation rotation shaft.

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