JPH0420604A - Compacting machine by viblation - Google Patents

Abstract

PURPOSE:To facilitate operation by oscillating a floating pulley bearing plate, and by converting the mutual phases of the eccentric pendulums of two shafts on the sides of a driven shaft and a driving shaft, with a belt, toothed on both the surfaces via floating pulleys. CONSTITUTION:A floating pulley bearing plate 22 having floating pulleys 23, 24 formed vertically integrally is set to be oscillated in the front and rear directions of a machine body. After that, around toothed pulleys 18, 20 arranged on a driving shaft 16 and a driven shaft 14 via the pulleys 23, 24, a belt 25 toothed on both the surfaces is applied, and the shaft 13 and the shaft 14 are synchronously rotated in the directions opposite to each other. Then, by oscillating the floating pulley bearing plate 22 in the front and rear directions of the machine body, the mutual phases of the eccentric pendulums 17, 19 of the shafts 13, 14 are converted via the belt 25, and the machine body is moved forward or backward. As a result, a mechanism can be easily manufactured at an economical cost.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention rotates two mutually parallel axes in opposite directions,
This invention relates to a vibratory compaction machine that can freely change the forward and backward directions of the machine by changing the phases of eccentric pendulums provided on two axes.

[Prior art] As a conventional vibration compaction machine of this kind, for example,
There is one described in Japanese Patent No. 8-17,768.

This vibratory compaction machine is equipped with eccentric pendulums mounted on a pair of parallel shafts with their installation angles 90 degrees out of phase with each other. When the excitation force of the eccentric pendulum is the same diagonally upward and downward, the resultant force causes the aircraft to move forward or backward, and if necessary, the phase of one of the eccentric pendulums is switched by 180" by external operation. The aircraft is designed to move in the opposite direction.

Further, as a means for switching the phase of one eccentric pendulum, a means for engaging and disengaging a gear for transmitting rotational force to one eccentric pendulum shaft is used to externally control the rotation angle of the pendulum shaft. The phase is set to be 180°.

[Problems to be Solved by the Invention] However, in such a conventional vibratory compaction machine, two parallel axes each having an eccentric pendulum are interlocked by gear transmission.

There is a problem that gear noise is generated due to high-speed rotation, and since the phase of the eccentric pendulum is switched by means of hooking and unhooking the claws, the impact force caused by the claws changing each time the forward and backward movement is changed. This caused the problem of hastening damage to the aircraft.

Furthermore, the structure for switching the phase is complicated and requires a large number of parts, which requires a lot of man-hours to manufacture.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a vibratory compaction machine that is simple in structure and easy to manufacture, yet can reliably switch between forward and backward movement.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides eccentric pendulums on two parallel axes, and adjusts the mutual phase of the eccentric pendulums during synchronous rotation of these two axes. In a vibrating compaction machine that is converted to move the machine body back and forth, a floating pulley support plate having an integral upper and lower floating pulley is provided so as to be swingable in the longitudinal direction of the machine body, and is provided on the two axes via the floating pulley. A double-sided toothed belt is wound around each of the toothed pulleys, the two shafts are rotated in opposite directions, and the phases of the eccentric pendulums of the two shafts are changed by swinging the floating pulley support plate. .

[Function] With the above configuration, the eccentric pendulums on the two axes provided in parallel rotate synchronously in opposite directions, and the floating pulley support plate swings in the longitudinal direction of the aircraft, so that the eccentric pendulums on the two axes are rotated in synchronization with each other in opposite directions. The phase is changed and the aircraft moves forward and backward.

[Example] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a partially cutaway side view showing the overall structure of a vibration compaction machine according to an embodiment of the present invention, FIG. FIG. 3 is a side view showing the configuration of the phase switching means of the oscillation device.

As shown in FIG. 1, this vibration compaction machine consists of a vibration device w2 provided on a compaction plate 1, a compaction plate frame 3, and a vibration isolating rubber 4.
A prime mover 6 provided on an engine stand 5 supported through the engine stand, a phase switching means 7 for switching the phase of the vibration excitation device 2, and an operation handle 8 extending diagonally rearward from the engine stand 5. We are prepared.

Power is then transmitted from the prime mover 6 via the belt 9 to the drive pulley 10 of the oscillating device 2, and the phase switching means 7 is operated by the operating lever 11 provided on the operating handle 8 via a connecting member 12 such as a push-pull wire. This allows the aircraft to move forward and backward.

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

An eccentric pendulum 1 is attached to the drive shaft 13 within the case 15.
7 are fixed together, a toothed pulley 18 is fixed to one end, and a drive pulley 10 is fixed to the other end.

Further, an eccentric pendulum 19 is integrally fixed to the driven shaft 14 within the case 15, and a toothed pulley 20 is attached to one end side.
is permanently installed.

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

A pair of upper and lower toothed pulleys 23 and 24 are rotatably provided on the floating pulley support plate 22 about the support shaft 21. A double-sided toothed belt 25 is hooked between the toothed pulley 18 of the drive shaft 13 and the toothed pulley 20 of the driven shaft 14 via the toothed pulleys 23 and 24, which are free pulleys, as shown in FIG. It's being passed around.

Therefore, the driven shaft 13 and the driven shaft 14 rotate in opposite directions in the directions of the arrows.

The upper end of the floating pulley support plate 22 is connected to the other end of a connecting member 12 whose one end is connected to the operating lever 11.

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

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

Rotation from the prime mover 6 is transmitted to the translation shaft 1 via the driving pulley 10.
3, the driven shaft 14 rotates via the double-sided toothed belt 25. The double-sided toothed belt 25 is connected to the moving shaft 1 via a pair of toothed pulleys 23 and 24, which are free pulleys.
3 toothed pulley 18 and the toothed pulley 20 of the driven shaft 14
Since the driven shaft 13 and the driven shaft 14 rotate in opposite directions to each other, both eccentric pendulums 17 and 19 rotate synchronously in the direction shown in FIG. 4 in the state shown in FIG.

If you turn the operating lever 11 forward from this state,
The floating pulley support plate 22 is swung forward via the connecting member 12, and this swiveling causes the driven shaft 14 to rotate 90' via the double-sided toothed belt 25 and the toothed pulley 2o, and accordingly, the eccentric pendulum 19 is phase-shifted by 90° from the state shown in FIG. 4, resulting in the state shown in FIG.

In this state, that is, the state shown in FIG. 5, when both eccentric pendulums 17 and 19 rotate in the direction of the arrow, b in FIG.
At this position, the directions of vibration of both pendulums 17 and 19 coincide downward, so that a compaction effect is produced.

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

Figure 6 shows a state in which the aircraft continues to move forward and then switches to reverse. That is, when the operating lever 11 is rotated toward the user's hand, the floating pulley support plate 22 is swung backward via the connecting member 12, and this oscillation causes the driven shaft to be rotated via the double-sided toothed belt 25 and the toothed pulley 20. 14 is 1
The eccentric pendulum 19 rotates by 80', and as a result, the eccentric pendulum 19 shifts its phase by 180 degrees from the state shown in FIG. 5 and enters the state shown in FIG. In this state, when both eccentric pendulums 17 and 19 rotate in the direction of the arrow, both pendulums 17 and 19 are at position h in FIG.
Since the vibration generation direction 19 is downward -IX in the opposite direction to the forward movement described above, a compaction effect is produced. Double pendulum 17.
19 continues to rotate in the same way and generates an upward excitation force in the opposite direction to that in the case of forward movement at position d in the figure, causing the aircraft to jump, so that the aircraft moves backward in the left direction in FIG.

In this way, the operation of switching the aircraft forward and backward is performed by switching the phase of the eccentric pendulum 19 of the driven shaft 14 using the double-sided toothed belt 25, so that no impact force is generated when switching forward or backward. , smooth switching operations can be performed.

[Effects of the Invention] As is clear from the above explanation, according to the configuration of the present invention, the phase change of the eccentric pendulum on the driven shaft is provided on the floating pulley support plate by swinging the floating pulley support plate. Mv
Since this is done with a double-sided toothed belt that is passed between the toothed pulley on the oscillating shaft side and the toothed pulley on the driven shaft side via a toothed pulley (J pulley), no impact force is generated during switching. The switching operation can be performed smoothly and without difficulty.

In addition, there is no need to use gears for the vibration generator, and there is no need to use claws, pins, etc. for the pendulum phase switching means, so the mechanism is extremely simple and can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing the overall structure of a vibratory compaction machine according to an embodiment of the present invention, and Fig. 2 is a cross-sectional view showing the configuration of the vibrating 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 oscillation device, and FIG.
6 through 6 are explanatory views of the operation, and FIGS. 7 through 8 are explanatory views showing the rotation stroke of the eccentric pendulum during forward and backward movement. 13.,,,,,,,,,. ,,,driven shaft 17.19
．． , , Eccentric Pendulum 18.19. , , toothed pulley 22 , , floating pulley support plate 23 , 24 . ,,, floating pulley (toothed pulley) 25,
,-,,,,,Double-sided toothed belt May 14, 1990 Figure V 1+F Figure 8 R〈-

Claims (1)

[Claims] In a vibratory compaction machine, an eccentric pendulum is installed on each of two parallel axes, and the phase of the eccentric pendulums is changed during the synchronous rotation of these two axes to move the machine forward and backward. A floating pulley support plate having a floating pulley is provided so as to be swingable in the longitudinal direction of the machine body, and a double-sided toothed belt is passed through each of the toothed pulleys provided on the two shafts through the front and rear floating pulleys, so that the two shafts are rotated in opposite directions. rotate it,
A vibratory compaction machine characterized in that the mutual phases of the two-axis eccentric pendulums are changed by the swinging of the floating pulley support plate.