JPH0657924B2 - Vibration compactor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention rotates two axes parallel to each other in opposite directions,
The present invention relates to an oscillating compactor in which an eccentric pendulum provided on two axes is converted in phase to freely change the forward and backward traveling directions of a machine body for traveling.

[Prior Art] A conventional vibration compactor of this kind is, for example, Jikkou Sho 5
8-17,768.

This vibration compactor is provided with eccentric pendulums whose mounting angles are 90 ° relative to each other on a pair of parallel shafts, and two eccentric pendulums that are interlocked via gears are rotated in opposite directions to each other. The eccentric pendulum can be moved forward or backward in one direction by the combined force when the motive force of the eccentric pendulum matches diagonally upward and downward, and by switching the phase of one eccentric pendulum 180 ° by external operation as necessary. It is designed to move the aircraft in the opposite direction.

Further, as a means for switching the phase of one eccentric pendulum, a gear for transmitting a rotational force to one eccentric pendulum shaft is provided with a hook-and-detachment means for externally operating the rotation angle of the pendulum shaft. It is designed to be 180 ° in phase.

[Problems to be Solved by the Invention] However, in such a conventional vibration compaction machine, since two parallel shafts provided with eccentric pendulums are interlocked by gear transmission, gear noise is generated due to high speed rotation. However, since the phase of the eccentric pendulum is switched by the hook disengagement means, an impact force is generated due to the hook being changed each time the forward / reverse movement is switched, which causes There was a problem of accelerating the damage.

Further, there is a problem that the structure for switching the phase is complicated, the number of parts is large, and the man-hours are required for manufacturing.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a vibration compactor that is simple in structure and can be easily manufactured, and that can reliably switch between forward and backward movements.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides eccentric pendulums on two axes provided in parallel, and the mutual phases of the eccentric pendulums are set during the synchronous rotation of these two axes. In a vibration compactor configured to move the machine body forward and backward, an idler pulley support plate having a vertically integrated idler pulley is swingably provided in the machine body front-rear direction, and the two shafts are provided through the idler pulley. A double-sided toothed belt is wound around each toothed pulley, the two shafts are rotated in opposite directions, and the mutual phase of the eccentric pendulum of the two shafts is converted by swinging of the floating pulley support plate. .

[Operation] With the above configuration, the eccentric pendulums on the two axes provided in parallel rotate in opposite directions synchronously, and the floating pulley support plate is swung in the machine front-rear direction. The phase is changed and the aircraft moves forward and backward.

Embodiments Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a partially cutaway side view showing the entire structure of a vibration compactor according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the configuration of a vibrating device provided on the machine body as seen from a plane. FIG. 3 is a side view showing the configuration of the phase switching means of the vibration oscillating device.

As shown in FIG. 1, this vibration compactor includes a vibrating device 2, a rolling plate frame 3, and a vibration damping rubber 4 provided on a rolling plate 1.
A prime mover 6 provided on the engine base 5 supported via the engine base 5, a phase switching means 7 for switching the phase of the vibration generating device 2, and an operation handle 8 extending obliquely rearward from the engine base 5. I have it.

Then, power is transmitted from the prime mover 6 to the drive pulley 10 of the vibration generator 2 via the belt 9, and the operation lever 11 provided on the operation handle 8 causes the phase switching means 7 to operate via the connecting member 12 such as a push-pull wire. The aircraft is moved forward and backward by operating it.

As shown in FIG. 2, the vibration generating device 2 includes a drive shaft 13 and a driven shaft 14 which are parallel to each other and are rotatably provided in a case 15 via bearings 16.

The drive shaft 13 has an eccentric pendulum 1 inside the case 15.
7 is integrally fixed, and a toothed pulley 18 is fixed to one end side and a drive pulley 10 is fixed to the other end side.

An eccentric pendulum 19 is integrally fixed to the driven shaft 14 in the case 15 and has a toothed pulley 20 on one end side.
Is fixed.

As shown in FIGS. 2 and 3, the phase switching means 7 is provided with a support shaft 21 parallel to the drive shaft 13 and the driven shaft 14 on the case 15, and a floating pulley support plate 22 on the support shaft 21. It is supported so that it can swing in the front-back direction.

The floating pulley support plate 22 is provided with a pair of upper and lower toothed pulleys 23, 24 rotatable about the support shaft 21. Then, a double-sided toothed belt 25 is hung between the toothed pulley 18 of the drive shaft 13 and the toothed pulley 20 of the driven shaft 14 via toothed pulleys 23 and 24, which are idler pulleys, as shown in FIG. It has been turned.

Therefore, the drive shaft 13 and the driven shaft 14 are adapted to rotate in opposite directions in the direction of the arrow.

The other end of the connecting member 12, one end of which is connected to the operation lever 11, is connected to the upper end of the floating pulley support plate 22.

Therefore, by rotating the operation lever 11 in the front-rear direction, the floating pulley support plate 22 is swung in the front-rear direction about the support shaft 21 via the connecting member 12.

Next, the operation of the above embodiment will be described.

The rotation from the prime mover 6 is transmitted through the drive pulley 10 to the drive shaft 1
3, the driven shaft 14 rotates via the double-sided toothed belt 25. The double-sided toothed belt 25 is driven by a pair of toothed pulleys 23 and 24 which are idle pulleys.
3 toothed pulley 18 and driven shaft 14 toothed pulley 20
Since the drive shaft 13 and the driven shaft 14 rotate in opposite directions in the arrow direction, both eccentric pendulums 17 and 19 rotate synchronously in the arrow direction in the state shown in FIG.

When the operation lever 11 is rotated forward from this state,
The idle pulley supporting plate 22 is swung forward through the connecting member 12, and this swing causes the driven shaft 14 to rotate 90 ° through the double-sided toothed belt 25 and the toothed pulley 20. Along with this, the eccentric pendulum. 19 shifts from the state shown in FIG. 4 by 90 ° to the state shown in FIG.

In this state, that is, in the state shown in FIG. 5, when both eccentric pendulums 17 and 19 rotate in the direction of the arrow, b in FIG.
At the position, the vibration generating directions of the two pendulums 17 and 19 coincide with the downward direction, so that a compacting action occurs.

Both pendulums 17 and 19 continue to rotate in the same manner to generate an upward vibrating force at the position f in the figure, causing the body to jump, so that the body moves forward in the right direction in FIG.

FIG. 6 shows a state in which the aircraft is switched to reverse after continuing to move forward. That is, when the operation lever 11 is manually rotated, the idler pulley support plate 22 is swung rearward via the connecting member 12, and this swinging causes the double-sided toothed belt 25 and the toothed pulley 20 to drive the driven shaft. 14 is 1
When the eccentric pendulum 19 is rotated by 80 °, the eccentric pendulum 19 is 180 ° out of phase with the state shown in FIG. 5 to be in the state shown in FIG. 6. When both eccentric pendulums 17 and 19 rotate in the arrow direction in this state, both pendulums 17 and 19 move in the position h in FIG.
Since the vibration generating direction of 19 coincides with the downward direction opposite to the case of the forward movement, a compacting action occurs. Both pendulums 17, 1
Similarly, 9 continues to rotate at the position "d" in the figure to generate an upward oscillating force in a direction opposite to that in the case of forward movement, causing the body to jump, so that the body moves backward in the leftward direction in FIG.

In this way, the forward / backward switching operation of the airframe is performed by switching the phase of the eccentric pendulum 19 of the driven shaft 14 by the double-sided toothed belt 25, so that no impact force is generated when switching between the forward and reverse directions. Therefore, a smooth switching operation can be performed.

EFFECTS OF THE INVENTION As is apparent from the above description, according to the configuration of the present invention, the phase conversion of the eccentric pendulum on the driven shaft is provided on the idle pulley supporting plate by swinging the idle pulley supporting plate. Since the double-sided toothed belt is wound around the toothed pulley on the drive shaft side and the toothed pulley on the driven shaft side via the toothed pulley, which is an idle pulley, any impact force, etc. is generated at the time of switching. The switching operation can be performed smoothly without any trouble.

Further, since it is not necessary to use a gear for the vibration oscillating device and it is not necessary to use a claw, a pin or the like for the phase switching means of the pendulum, the mechanism is extremely simple and can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing the entire structure of a vibration compactor according to an embodiment of the present invention, and FIG. 2 is a sectional view showing the configuration of a vibration oscillating device provided in the machine body as seen from a plane. FIG. 3 is a side view showing the configuration of the phase switching means of the vibration generator, FIG.
FIGS. 6 to 6 are explanatory views of the operation, and FIGS. 7 to 8 are explanatory views showing the rotation stroke of the eccentric pendulum during forward and backward movements. 13 ... Drive shaft, 14 ... Driven shaft 17, 19 ... Eccentric pendulum 18, 19 ... Toothed pulley 22 ... Floating pulley support plate 23, 24 ... Floating pulley (toothed pulley) 25 ... Double-sided tooth With belt

Claims (1)

[Claims] 1. An oscillating compactor in which eccentric pendulums are provided on two parallel axes, and the phases of the eccentric pendulums are converted during the synchronous rotation of these two axes so that the machine body moves forward and backward. In the above, a floating pulley support plate having a pair of upper and lower floating pulleys is provided so as to be swingable in the machine front-back direction, and a double-sided toothed belt is wound around each toothed pulley provided on the two shafts through the front-rear floating pulleys. The two shafts are rotated in opposite directions, and the floating pulley support plate swings to move the two shafts.
A vibration compactor characterized in that the eccentric pendulum of the shaft is adapted to convert the mutual phase.