Vibration device with self-adjusting impact bars

Abstract

Disclosed is a vibration device with a vibrating table for a concrete block manufacturing machine for compression of a material to be compressed. The vibration device is at least partially resiliently mounted on a machine frame and driven by at least one electric motor. As a result the vibrating table can be set in a predominantly vertical vibrating movement, wherein the vibration device has a plurality of vibrating table bars arranged parallel to one another and fastened to the vibrating table and impact bars fastened statically to the machine frame. All the impact bars are displaceable relative to the vibrating table bars and along a displacement axis running parallel to the vertical vibrating movement by a plurality of positioning devices connected to one another and driven by at least one common drive unit in order to obtain a synchronous displacement of all the impact bars.

Claims

1. A vibration device for a concrete block manufacturing machine for compression of a material to be compressed, wherein the vibration device comprises a vibrating table, a machine frame, at least one electric motor, a plurality of positioning devices, and at least one common drive unit, wherein the vibration device is at least partially resiliently mounted on the machine frame and driven by the at least one electric motor and as a result the vibrating table can be set in a predominantly vertical vibrating movement, wherein the vibration device has a plurality of vibrating table bars arranged parallel to one another and fastened to the vibrating table and impact bars fastened statically to the machine frame, wherein all the impact bars are displaceable relative to the vibrating table bars and along a displacement axis running parallel to the vertical vibrating movement by the plurality of positioning devices connected to one another and driven by the at least one common drive unit in order to obtain a displacement of all the impact bars, wherein the vibration device is adapted to adjust the surface of each impact bar by the plurality of positioning devices in an angle of inclination with respect to the horizontally oriented vibrating table bars.

2. The vibration device according to claim 1, wherein the vibration device is adjustable in such a way that in a standby state the impact bars are arranged below the vibrating table bars or span a common plane.

3. The vibration device according to claim 2, wherein all of the impact bars have a wear bar connected to a support bar, and the support bar is connected by at least one fastening device to at least one positioning mechanism.

4. The vibration device according to claim 3, wherein the positioning mechanism has an upper wedge element and a lower wedge element connected to a shaft, wherein the lower wedge element is displaceable along an axis extending parallel to the impact bars by the rotation of the shaft, and as a result the upper wedge element is adjustable along the displacement axis, the upper wedge element sliding on the underside along an oblique upper surface of the lower wedge element.

5. The vibration device according to claim 4, wherein the upper wedge is connected to a fastening element of the fastening device in order to displace the impact bars along the displacement axis.

6. The vibration device according to claim 3, wherein the positioning mechanism has a worm gear and a worm shaft, wherein the fastening device connected to the worm gear is adjustable along the displacement axis by the rotation of the worm shaft, the worm gear being meshed on the front face with the worm shaft.

7. The vibration device according to claim 3, wherein the positioning mechanism has a spur gear meshed with a spur gear shaft and connected to the fastening device, wherein the fastening device is adjustable along the displacement axis by the rotation of the spur gear shaft.

8. The vibration device according to claim 3, wherein the positioning device has a torque transmission device which indirectly connects the positioning mechanisms to the drive unit in a retaining device arranged alongside and/or below the vibrating table.

9. The vibration device according to claim 8, wherein the torque transmission device has a cardan shaft which is configured for transmission of a torque to the positioning devices.

10. The vibration device according to claim 8, wherein the torque transmission device has a cardan shaft which is configured for transmission of a torque to the positioning devices.

11. The vibration device according to claim 8, wherein the positioning device has an angular gear which transmits the torque predetermined by the drive unit to the positioning mechanism by an angle, the angular gear being connected to the torque transmission device.

12. The vibration device according to claim 9, wherein the positioning device has an angular gear which transmits the torque predetermined by the drive unit to the positioning mechanism by an angle, the angular gear being connected to the torque transmission device.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further objects, advantages, features and possible applications of the present invention are apparent from the following description of embodiments with reference to the drawings. In this case all the features described and/or illustrated, considered alone or in any sensible combination, form the subject of the invention, also independently of their combination in the claims or their dependencies.

(2) In the drawings:

(3) FIG. 1 shows a perspective view of a concrete block manufacturing plant with a vibrating device and a plurality of impact bars which can be adjusted by positioning devices;

(4) FIG. 2 shows a perspective view of a positioning device of an impact bar according to a first embodiment of the invention;

(5) FIG. 2a shows a perspective cross-sectional representation of a positioning device of an impact bar according to a first embodiment of the invention;

(6) FIG. 2b shows a schematic representation of a positioning device of an impact bar according to a first embodiment of the invention in a first position;

(7) FIG. 2c shows a schematic representation of a positioning device of an impact bar according to a first embodiment of the invention in a second position;

(8) FIG. 3 shows a perspective representation of a positioning device of an impact bar according to a second embodiment of the invention;

(9) FIG. 3a shows a schematic representation of a positioning device of an impact bar according to a second embodiment of the invention in a first position;

(10) FIG. 3b shows a schematic representation of a positioning device of an impact bar according to a first embodiment of the invention in a second position;

(11) FIG. 4 shows a perspective cross-sectional representation of a positioning device of an impact bar according to a third embodiment of the invention;

(12) FIG. 5 shows a perspective representation of positioning devices with torque transmission devices according to an embodiment of the invention;

(13) FIG. 6 shows a perspective representation of positioning devices with torque transmission devices according to a further embodiment of the invention;

(14) FIG. 7a shows a perspective transparent representation of a positioning device of an impact bar according to a further embodiment of the invention;

(15) FIG. 7b shows a perspective representation of a positioning device of an impact bar according to an embodiment shown in FIG. 7a as a solid body.

DETAILED DESCRIPTION OF THE INVENTION

(16) FIG. 1 shows a perspective view of a concrete block manufacturing plant 28 with a vibrating device 1 and a plurality of impact bars 5 which can be set and adjusted by positioning devices 6. The illustrated vibrating device has a vibrating table 2 with vibrating table bars 4 which are screwed to a machine frame 3 of the concrete block manufacturing device 28. The illustrated impact bars 5 can be adjusted in height relative to the vibrating table bars 4 by the adjusting devices 6.

(17) A generic vibrating device 1 typically has overall five impact bars 5 and ten vibrating table bars 4. In this case each impact bar 5 is arranged between two vibrating table bars 4. A different number of impact bars 5 and vibrating table bars 4 would likewise be conceivable.

(18) The illustrated adjusting devices 6 have fastening devices 11 and positioning mechanisms 7. The positioning mechanisms 6 are mechanically connected to drive units 20 by means of torque transmission devices 19. In the illustrated embodiment the concrete block manufacturing device 28 the torque devices 19 are designed as cardan shafts 21.

(19) The drive units 20 are fastened below a common retaining device 8. The retaining device 8 is preferably fastened laterally to the vibrating device 1 in a pit.

(20) FIG. 2 shows a perspective view of a positioning device 6 of an impact bar 5 according to a first embodiment of the invention. The illustrated positioning device has an upper part, which is designed as a fastening device 11 for the impact bar 5, and a lower part, which is designed as a positioning mechanism 7. The fastening device is intended for fastening of the impact bar and has an upper bearing shell 23a and a lower bearing shell 23b, which has an upper wedge element 12, and the impact bar 5 can be inserted at least partially between the bearing shells. Each bearing shell has a recess 24, wherein, when the bearing shells are screwed together, the recesses together have a round basic shape. In the illustrated embodiment of the positioning device the lower bearing shell together with an upper part of the positioning mechanism 7, which is shown as an upper wedge element 12, is illustrated as one single component.

(21) The positioning mechanism 7 is protected by a housing 23 against external influences and has an upper wedge element 12, a lower wedge element 14 and a shaft 13. The positioning mechanism is intended to displace the fastening device along a displacement axis z by the rotation of the shaft 13, in order thereby to set a required position of the impact bar. For this purpose the upper wedge element 12 has an oblique lower surface 12a and the lower wedge element 14 has an oblique upper surface 14a, wherein the two oblique surfaces are connected to one another so as to be complementary, are touching one another and are preferably guided by a T-slot. Furthermore, the lower wedge element 14 is mechanically connected rotatably to the shaft 13 by a thread (illustrated in FIG. 2a).

(22) The housing 23 for the positioning mechanism 7 has a cavity 27 into which the wedge elements and the shaft are inserted. The cavity 27 preferably has a cube shape, in which the upper wedge element 12 slides with its likewise cube-like basic shape along the perpendicular sides in a displacement movement. The lower wedge element 14 is arranged in the lower region of the cavity 27 and slides along the two perpendicular sides of the cavity arranged parallel to one another during a relative movement caused by the rotation of the shaft. Furthermore, the housing 23 has two recesses 28a, 28b (reproduced in FIG. 2a) arranged parallel to one another on the perpendicular sides of the housing for the shaft and a further recess 28c (reproduced in FIG. 2a) on an upper side of the housing for the upper wedge element. The cavity 27 of the housing 23 forms the recess for the upper wedge element 12.

(23) FIG. 2a shows a perspective cross-sectional representation of the positioning device 6 from FIG. 2. The lower wedge element 14 has a thread 14a on its underside, into which a thread 13a of the shaft 13 is introduced. It is also conceivable that the lower wedge element 14 has a recess which is provided with a thread. In such a case, the shaft can be inserted into the recess of the lower wedge element 14 in order to mesh the shaft with the lower wedge element. The shaft is preferably designed as a spindle which is inserted into the recess 28a of the housing 23, the thread 13a of the shaft being arranged predominantly inside the cavity 27.

(24) FIGS. 2b and 2c show schematic representations of the positioning device 6 illustrated in FIG. 2 in a first set position P1 and a second set position P2. The positioning device shown is displaceable along a displacement axis z. In this case the position P1 constitutes a starting position and the position P2 is a desired set position of the positioning device. The position P2 is distinguished by the fact that the fastening device 11 can be set higher overall by comparison with the position P1 by a relative movement RB2, measured along the displacement axis z. This relative movement RB2 is a direct reaction to the relative movement RB1 of the lower wedge element 14 and the rotary movement D of the shaft 13. While the shaft 13 is rotated about its shaft axis WA, this turning movement D is transmitted by its thread 13a to the thread 14b of the lower wedge element 14 as a translational movement TB along an axis y perpendicular to the displacement axis. The translational movement TB of the lower wedge element 14 is transmitted via its oblique upper surface 14a to the upper wedge element 12 by sliding along the oblique lower surface 12a. This results in a relative movement RB1 between the upper wedge element 12 and the lower wedge element 14, which leads to a relative movement RB2.

(25) FIG. 3 shows a perspective view of a positioning device 6 of an impact bar 5 according to a second embodiment of the invention. The positioning device 6 illustrated here has a fastening device 11 with two bearing shells 23a, 23b, a positioning mechanism 7 and a bearing element 25. It is conceivable that the bearing element 25 is a sliding bearing.

(26) An impact bar can be at least partially arranged and screwed between the bearing shells. In principle, the fastening device 11 is similar to the fastening device illustrated in FIG. 2. The difference is merely that the lower bearing shell 23b is connected to a screw element 26 (illustrated in FIG. 3a) via the bearing element 25.

(27) The positioning mechanism 7 is a so-called worm gear unit and has a worm shaft 16 with a thread 16a, a worm gear 15 with a plurality of teeth 15a and the screw element 26 arranged inside the worm gear. The thread 16a is meshed with the teeth 15a, the worm gear 15 being screwed to the screw element 26 (illustrated in FIG. 3a). The positioning mechanism 7 is accommodated in a cavity 27 of a housing 23 which protects the components of the positioning mechanism located therein against contamination, the effects of extraneous forces and moisture.

(28) FIGS. 3a and 3b show schematic representations of the positioning device illustrated in FIG. 3 in a first set position P1 and a second set position P2. The positions P1 and P2 correspond to the starting position and desired set position of the positioning device 6 defined in FIGS. 2b and 2c. The position P2 can be set by the rotation on the worm shaft 16 about its own shaft axis WA, wherein due to its meshing with the worm gear 15 the worm shaft 16 also rotates this about its own gear axis RWA. The gear axis RWA and the shaft axis WA are arranged perpendicular to one another, with the gear axis running parallel to the displacement axis z.

(29) During rotation of the worm shaft 16 a first rotary movement D1 is produced, which is transmitted by the thread 16a to the teeth 15a of the worm gear 15. In this way the worm gear 15 is rotated about its gear axis RWA and a second rotary movement D2 is produced. Due to the second rotary movement D2 a screw thread 15b arranged inside the worm gear 15 and a screw thread 26a of the screw element 26 are displaced upwards in a relative movement RB along the displacement axis z.

(30) FIG. 4 shows a perspective cross-sectional representation of a positioning device 6 of an impact bar 5 according to the third embodiment of the invention. The positioning device 6 has a positioning mechanism 7 which represents a spur gear unit. The positioning mechanism 7 has a spur gear shaft 17 and a spur gear 18, wherein the spur gear shaft 17 is meshed via its teeth 17a with the teeth 18b of the spur gear 18. The illustrated positioning device 6 is similar to the positioning device illustrated in FIG. 3. A significant difference is that the spur gear shaft 17 rotates about a shaft axis running parallel to the spur gear axis RWA. The spur gear axis RWA and the shaft axis WA both extend parallel to a displacement axis z.

(31) FIG. 5 shows a perspective representation of the positioning devices 6 shown in FIG. 1 with torque transmission devices 19. In the drawing the torque transmission devices 19 constitute toothed belts 21. The positioning devices 6 are driven by a drive unit 20 via toothed belt pulleys or toothed belt wheels 8a and a torque transmission device 19. The retaining device 8 preferably has a plurality of vibration dampers 8b which protect the individual components against vibrations during the production process. The second torque transmission device, the deflecting gear wheels 8a and the drive unit 20 could be fastened to a retaining device 8. The number of toothed belt pulleys or toothed belt wheels 8a corresponds in this case to the number of positioning devices 6, so that each positioning device 6 positions the positioning mechanism 7 by means of its own torque transmission device 19 and the toothed belt pulleys or toothed belt wheels 8a in order to obtain a displacement of the impact bars 5 relative to the vibrating table bars 4. In the illustrated embodiment of the invention ten drive units 20 are each arranged below the retaining device 8.

(32) The impact bars 5 each have a support bar 9 and a wear bar 10, each of the support bars 9 being screwed inside the fastening devices 11 between two bearing shells 23a, 23b. The wear bars 10 are firmly screwed in each case above the fastening devices 11.

(33) FIG. 6 shows a perspective representation of the positioning devices 6 illustrated in FIG. 3 with torque transmission devices 19 according to a further embodiment of the invention. In the drawing the torque transmission devices 19 constitute cardan shafts 22. The cardan shafts 22 are advantageously combined with the spur gear units as positioning devices 6.

(34) FIG. 7a shows a transparent perspective view of a positioning device 6 of an impact bar 5 according to a further embodiment of the invention. FIG. 7b shows the same positioning device 6 as a full body. The illustrated positioning device 6 is substantially similar to the positioning device from FIG. 2. Consequently the positioning device 6 likewise has a fastening device 11 for the impact bar 5 and a positioning mechanism 7 which is installed in a housing 23.

(35) The fastening device 11 preferably has a first fastening element 23a and a second fastening element 23b, wherein the second fastening element 23b has a bore 23c, preferably a partially open bore, in which the first fastening element 23a can be used. The second fastening element 23b has substantially a shape of a cuboid which can be partially fitted in a housing 23. The part of the second fastening element 23b which can be fitted into the housing 23 preferably has a wedge element 12 with an oblique lower surface 12a. As explained in FIG. 2, this surface 12a is a part of the positioning mechanism 7. The first fastening element 23a can be inserted at least partially into the part of the second fastening element 23b located outside the housing 23.

(36) The first fastening element 23a is preferably shaped substantially as a cylinder. It is conceivable that the peripheral surface of the first fastening element 23a has a planar surface 23d which can be arranged outside the second fastening element 23b.

(37) It is conceivable that by such a fastening device 6 an impact bar 5 can be set at an angle with respect to the vibrating table bar 6 by rotating the first fastening element 23a inside the second fastening element 23b about a centre axis M of the first fastening element 23a. Such a rotary movement D4 about the centre axis M is preferably suitable and intended for setting an angle of inclination of the surface of the impact bar 5. As a result the impact bar 5 can be set particularly simply in a desired oblique position.

LIST OF REFERENCES

(38) 1 vibrating device 2 vibrating table 3 machine frame 4 vibrating table bars 5 impact bars 6 positioning device 7 positioning mechanism 8 retaining device 8a toothed belt pulley/toothed belt wheel 9 support bar of an impact bar 10 support bar of an impact bar 11 fastening device 12 upper wedge element 12a oblique lower surface of the upper wedge element 13 shaft 13a thread of the shaft 14 lower wedge element 14a oblique upper surface of the lower wedge element 14b thread of the lower wedge element 15 worm gear 15a teeth of the worm gear 15b screw thread inside the worm gear 16 worm shaft 16a thread of the worm shaft 17 spur gear shaft 17a gears of the spur gear shaft 18 spur gear 18a teeth of the spur gear 19 torque transmission device 20 drive unit 21 cardan shaft 22 toothed belt 23 housing 23a upper bearing shell/first fastening element 23b lower bearing shell/second fastening element 23c bore 24 recess in the fastening device 25 bearing element 26 screw element 26a screw thread of the screw element 27 cavity in the housing 28 concrete block manufacturing machine Z displacement axis Y axis running parallel to the impact bar X axis running perpendicularly to the impact bar and the displacement axis D1 first rotating movement D2 second rotating movement D4 rotating movement about the centre axis M centre axis of the upper bearing shell WA shaft axis RWA gear axis RB1 first rotating movement RB2 second rotating movement P1 first setting position of the positioning device/starting position P2 second setting position of the positioning device/desired setting position