JPS5913018Y2 - Stroke adjustment jig for heavy vibrator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stroke adjustment device for a heavy vibrating body such as an ultra-large vibrating sieve device.

For example, it is very difficult to adjust the vibration stroke of a heavy vibrating body weighing several tons due to the large weight of this vibrating body.

Therefore, the present invention provides a jig that can easily adjust the stroke.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 is a rotating shaft, and a pair of stands 3 on a base plate 2
is rotatably supported via a bearing 4.

5 is a bevel gear box, one shaft 6 rotatably supported by the box 5 is connected to one end of the rotating shaft 1 via a coupling 7, and the other shaft 8 is connected to a drive device (not shown). ).

Therefore, by operating the drive device, the rotating shaft 1 can be rotated.

Reference numeral 9 denotes an eccentric shaft portion formed approximately at the center of the rotating shaft 1, and its axis B is offset from the eccentricity A of the rotating shaft 1 by an amount α.

Reference numeral 10 denotes an eccentric bushing fixed onto the eccentric shaft portion 9 by shrink fit, and the axis C of the outer circumferential circle 10a is offset from the axis B of the eccentric shaft portion 9 by an amount β.

In this embodiment, α=β.

Reference numeral 11 denotes an oil passage extending from an oil filler port 11a on the side surface of the bushing 10 to the inner circumferential surface of the bushing 10, and a hydraulic adapter (not shown) for a hydraulic pump (not shown) is connected to the oil filler port 11a. When the bushing 10 and the eccentric shaft portion 9 are installed and pressurized oil is pressurized into the oil passage 11, the shrink fit between the bushing 10 and the eccentric shaft portion 9 is released.

12 is a heavy vibrating body; 13 is a bracket bolted onto the vibrating body 12; 14 is a vibrating arm, the upper end of which passes through the vibrating body 12 and is rotatably connected to the bracket 13 with a pin 15; The through hole 14a at the lower end is rotatably fitted into the eccentric bushing 10 via a bearing 16.

17 is a spherical bush.

18 is a spline groove formed on the inner circumferential surface of one end of the eccentric bushing 10; 19 is a spline mountain formed on the rotary shaft 1 at a location opposite to the spline groove 18; and 20 is a spline formed on the outer circumferential surface. A stroke adjusting ring 21 and 22 is arranged such that the ridge 20 a fits into the spline groove 18 and the spline groove 20 b formed on the inner circumferential surface fits into the spline ridge 19 . A pair of lock nuts are screwed into the upper threaded portion 23, and a connecting plate 24 bolted to the end face of the ring 20 is installed in an annular groove 21a formed on the outer peripheral surface of the nut 21 on the side closer to the ring 20. It is embedded.

Therefore, the nut 21 and the ring 20 move together along the axis A of the rotating shaft 1.

25 is a protective cover.

In this embodiment, 40 spline grooves 18 are formed in the eccentric bushing 10, and half of the multi-grooves 18 are marked with stroke numbers 27 from 0 to 20J along the direction of arrow A.

Also, each spline ridge 20a of the stroke adjustment ring 20
The stroke pointer 28 is formed on an appropriate one of these, and in the state where the eccentricities α and β cancel each other out (state in FIG. 7), the pointer 28 reaches the stroke number 27 “0”.
Set to match.

Reference numeral 29 denotes a fixing jig for the eccentric bushing 10, which includes a circular arc portion 29a that contacts the outer circumferential surface of the bushing 10, and a circular arc portion 29a that protrudes from one end of the circular arc portion 29a and that extends around the outer circumferential surface of the bushing 10. Multi-grooves 3 formed at appropriate intervals along the direction
0, a protrusion 29b that fits into a suitable groove 30, and a rod-shaped part that extends from the other end of the arcuate part 29a in the radial direction of the arcuate part 29a and comes into contact with the stopper 32 on the base plate 2. 29C, which prevents the eccentric bushing 10 from rotating in the direction of arrow A.

33 is a stroke adjustment jig for rotating the rotary shaft 1 by a predetermined amount, and has a hexagonal through hole 34a, a cap 34 that fits into a hexagonal portion 35 at the other end of the rotary shaft 1, and a stroke adjustment jig formed on the inner peripheral surface. a disc 36 that fits into a spline 34 b formed on a half of the outer peripheral surface of the cap 34; and a main body 3.
The lower end of 7a is rotatably fixed to a bracket 38 on the board with a bolt/nut 39, and the piston rod 37
A hydraulic jack 37 whose tip b is rotatably fixed to the arm portion 36 a of the disc 36 with a l-40 bolt.
It consists of

41 is a handle attached to the cap 34.

The stroke adjustment procedure will be explained based on the above configuration.

For example, if the eccentricities α and β are 4.5 mm, in the state shown in FIG. However, since the axial center C of the outer circumference 10a of the eccentric bushing 10 is located directly below the axial center B of the eccentric shaft portion 9 and is eccentrically downward by 4.5 mm, in the end, α and β cancel each other out. This becomes zero, and the through hole 14a of the vibrating arm 14 and the rotating shaft 1 become concentric.

Therefore, the pointer 28 faces the stroke number 27 "0", indicating that the stroke is zero.

In the loose state, even if the rotating shaft 1 is rotated by the drive device via the shafts 8 and 6, the vibrating arm 14 does not move up and down, and the heavy vibrating body 12 does not vibrate.

Next, from the above state, move the heavy vibrating body 12 to stroke 4.
If you want to vibrate at 5mm, do the following.

First, remove the cover 25 and remove the protrusion 29 of the fixing jig 29.
B is fitted into a suitable groove 30 of the eccentric bushing 10, and the rod-shaped portion 29C is applied to the stopper 32 to prevent the eccentric bushing 10 from rotating in the direction of arrow A.

Next, loosen both lock nuts l-21 and 22, and connect plate 24.
, the stroke adjustment ring 20 is moved in the direction of the arrow, and the spline groove 18 and the spline groove 20a are fitted together, and the spline groove 19 and the spline groove 20b are fitted.
Release the mating with each.

Next, attach the hydraulic adapter of the hydraulic pump to the oil filler port 11a.

Also, lift the cap 34 by grasping the handle 41, fit the hexagonal through hole 34a into the hexagonal part 35 of the rotating shaft 1, fit the splines of the disc 36 into the splines 34b of the cap 34, and The upper and lower ends of the jack 37 are respectively secured to the bracket 38 and the arm portion 36a of the disc 36 with bolts and nuts L-39 and 40.

Next, the hydraulic pump is operated to inject pressure oil into the oil passage 11 at a pressure of, for example, 420 kg/an□ to 500 kg/an□ to check the shrink fit state between the eccentric bushing 10 and the eccentric shaft portion 9. unlock.

Next, the hydraulic jack 37 is operated to retract the piston rod 37b shown in solid line in FIG. 5 against the spring in the main body 37a as shown by the imaginary line in the same figure.

As a result, the rotating shaft 1 is rotated in the direction of arrow A via the disc 36 and the cap 34.

Due to one contraction of the piston rod 37b, the rotation axis 1
In terms of stroke numbers, the piston rod rotates only from "0" to "4", so the piston rod 3 mentioned above
7b, hold the handle 41 and pull the cap 34 in the direction of the arrow to release the fitting between the spline 34b and the spline of the disc 36, as shown by the solid line in FIG.

As a result, the disk 36 becomes free, so that the piston rod 37b is extended by the flexure within the main body 37a.

Next, push out the cap 34 in the direction of the arrow, and fit the spline 34b into the spline of the disk 36 again.
Retract the piston rod 37b again, rotate the rotary shaft 1 in the direction of the arrow A, and repeat the same operation to make the pointer 28 correspond to the stroke number 27 "10" as shown in FIG. Rotation axis 1 is 90° from the state shown in the figure.
).

Next, tighten the lock nuts 21 and 22, and tighten the spline ridge 20a of the stroke adjustment ring 20 and the spline groove 20.
b are the spline groove 18 and the spline mountain 19, respectively.
and fit together.

Next, the hydraulic pressure in the oil passage 11 is released, and the fixing jig 29, cap 34, and hydraulic jack 37 are removed.

In this state, as shown in FIG.
is on the same horizontal line as the axis A of the rotating shaft 1, and the axis C of the outer circumference 10a of the eccentric bushing 10 is directly below the axis B, so when the rotating shaft 1 is rotated, the vibrating arm 14 It moves up and down, and the heavy vibrating body 12 vibrates with a stroke of 4.5 mm.

Next, when it is desired to vibrate the heavy vibrating body 12 at the maximum stroke, the pointer 28 may be set to correspond to the stroke number 27 "20" as shown in FIG. 9 by following the same procedure as described above.

In this state, each axis A. B and C are lined up along a vertical line, the stroke is α+β=9 mm, and the heavy vibrating body 12 vibrates with a stroke of 9 mm.

In the above embodiment, the eccentric bush 10 is fixed to the eccentric shaft portion 9 by shrink fitting, but it may also be fixed by a flange joint, for example.

Furthermore, although the eccentricities α and β are made to match, it goes without saying that they do not need to be made to match.

As described above, according to the stroke adjustment device for a large-weight vibrating body of the present invention, the axis of the eccentric shaft portion is eccentric from the axis of the rotating shaft, and the axis of the eccentric bushing is eccentric from the axis of the eccentric shaft portion. Since it is eccentric, so-called double eccentricity, it is possible to freely change the stroke of the heavy vibrating body by simply rotating the rotating shaft by a predetermined angle using a hydraulic jack. be.

Furthermore, a spline of an appropriate width is formed on the outer peripheral surface of the cap, which is movable along the axial direction of the rotating shaft, and the spline on the inner peripheral surface fits into the spline of the cap. Since a connecting body is provided, when the rotating shaft is rotated by a hydraulic jack and its extension/contraction stroke reaches its limit, the cap is moved along the axis of the rotating shaft to connect the spline to the connecting body. Simply by releasing the hydraulic jack, the expansion and contraction stroke of the hydraulic jack can be returned to its original state, and the rotating shaft can be rotated again.

Therefore, the rotary shaft can be rotated beyond the extension and contraction stroke of the hydraulic jack. In other words, the hydraulic jack can be significantly downsized, and is highly economical and easy to operate.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, with Figure 1 being a longitudinal sectional view and Figure 2 being a longitudinal sectional view.
The left half of the figure is a IIa-IIa arrow view in Figure 1, the right half of Figure 2 is a IIb-IIb arrow view in Figure 1, FIG. The figure is a view taken along the line IV-IV in Figure 3, Figure 5 is a side view of the stroke adjustment jig, Figure 6 is a vertical sectional view of the main parts of the jig, and Figures 7 to 9 are stroke adjustment. It is a schematic explanatory diagram showing the procedure. 1... Rotating shaft, 3... Stand (fixed body), 9...
・Eccentric shaft portion, 10... Eccentric bushing, 10 a...
Outer circumference circle, 11...Oil path, 12...Large weight vibrating body, 1
4... Vibration arm, 18.20b... Spline groove, 19.20 a... Spline mountain, 20... Stroke adjustment ring (stroke adjustment body), 21° 22
...Lock nut (release means), 24...Connection plate,
28... Stroke pointer, 29... Fixing jig, 3
3...Stroke adjustment jig, 34...Cap, 3
4 b...Spline, 36... Disc (connection body),
37...Hydraulic jack, A, B. C...Axis center.

Claims (1)

[Scope of utility model registration request] A rotating shaft rotatably supported by a fixed body is provided, an eccentric shaft part whose axis center is offset by a predetermined amount from the axis center of the rotating shaft is formed on the rotating shaft, and an axis of an outer circumference is formed on the eccentric shaft part. An eccentric bush whose center is offset by a predetermined amount from the axis of the eccentric shaft is fixed, the eccentric bush is configured to be released from the fixed state with respect to the eccentric shaft, and one end is rotatably connected to a heavy vibrating body. A through hole at the other end of the vibrating arm is rotatably fitted into the eccentric bushing, a stroke adjustment body is provided to fit between the eccentric bushing and the rotating shaft, and a release means is provided for releasing the fitted state of the stroke adjustment body. In the vibration device for a large-weight vibrating body, a cap that cannot rotate but is movable along the axial direction of the rotating shaft is fitted onto the rotating shaft, and a cap that is movable along the axial direction of the rotating shaft is fitted on the outer peripheral surface of the cap. A spline of an appropriate width is formed along the cap, a connecting body is provided in which the spline on the inner circumferential surface fits into the spline of the cap, and a hydraulic jack for rotating the rotating shaft is provided, which is connected to the connecting body and the fixed body. A stroke adjustment jig for a large-weight vibrating body.