JP2006009458A - Oscillating type rolling machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oscillating type rolling machine which can eliminate an adverse effect on a belt by reducing fluctuation of a center distance between pulleys of a prime mover and of an exciter, caused by rotation of a pendulum, and can eliminate attenuation of oscillation due to internal resistance of a rubber isolator, to thereby generate sufficient oscillation. <P>SOLUTION: The oscillating type rolling machine is formed of a rolling board, the prime mover, and the exciter, and constructed by mounting the prime mover on the rolling board via a vibration preventing means, and fixing the exciter onto the rolling board. The exciter is formed of the pulley and the pendulum which are coaxially supported, and the pulley of the exciter is connected to the pulley linked to an output shaft of the prime mover via a belt. The pulley of the exciter is axially supported on a pulley shaft such that the center of the pulley is decentered to the center of gravity of the pendulum with respect to a pendulum axis. The eccentricity of the pulley of the exciter is equal to 1/2 as much as an amplitude of oscillation thereof. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vibration type compacting machine used for rolling quarry, sand, soil, etc. laid on a roadbed or the like, or for finishing asphalt pavement.

  Conventionally, vibratory compactors used for rolling a surface layer of quarry, sand, earth, etc. laid on a road or the like or for finishing asphalt pavement are known and widely used. The vibration type compactor includes a compaction plate placed on a road surface, a prime mover mounted on the compaction plate via a vibration absorbing means, an excitation means connected to the compaction plate, and an output of the prime mover. And a power transmission means for transmitting to the motor, for example, disclosed in Japanese Patent Laid-Open No. 2000-192416.

  A conventionally known vibration type compaction machine supports a pendulum consisting of a weight on a pulley shaft of an exciter, and the pulley shaft is driven and rotated by the prime mover via a belt, and is excited by rotation of the pendulum. The vibration is transmitted to the rolling plate to perform the rolling. The belt is stretched between pulleys on the prime mover side and the exciter side, but the distance between the axes of the two pulleys varies greatly with the rotation of the pendulum. Consumption and damage were significant. For example, the belt of a vibrating compactor having a vibration of 80 to 100 hertz is under extremely severe conditions, and therefore the amplitude of the compaction plate is limited to 1.5 to 1.9 mm.

  In addition, the rolling plate including the vibrator and the prime mover are coupled via an anti-vibration rubber so that the vibration of the rolling plate is absorbed by the anti-vibration rubber and the prime mover is isolated from the vibration of the rolling plate. However, if the mass of the generator side including the pressure plate and the prime mover side, which are separated via the vibration isolator rubber, is almost equal or the mass of the prime mover side is large, the vibration of the compaction plate is attenuated by the internal resistance of the vibration isolator rubber. There is a problem that sufficient vibration cannot be generated.

JP 2000-192416 A

  This invention eliminates adverse effects on the belt by reducing fluctuations in the inter-shaft distance between the pulleys on the prime mover side and the exciter side due to the rotation of the pendulum, and eliminates vibration attenuation due to the internal resistance of the vibration proof rubber. And should be able to generate sufficient vibration.

  The present invention comprises a rolling plate, a prime mover, and a vibration body, the prime mover is mounted on the pressure plate via a vibration isolating means, the vibration body is fixedly disposed on the pressure plate, A pulley and a pendulum supported on the same axis are provided, and the pulley on the exciter is connected to a pulley connected to the output shaft of the prime mover via a belt, and the pulley on the exciter is connected to the shaft of the pendulum. Eccentric so that the center is located on the center of gravity side of the pendulum and is supported by the pulley shaft. The eccentric amount of the pulley on the exciter is ½ of the amplitude of vibration. . In this specification, the amplitude of vibration means both amplitudes. In this specification, the width of vibration means both amplitudes.

  It consists of a compaction plate, a prime mover, and a vibration body. The prime mover is mounted on the compaction plate via vibration isolation means, and the vibration generator is fixedly arranged on the compression plate. A combination of anti-vibration rubber and metal springs provided with supported pulleys and pendulums, wherein the pulleys on the side of the vibrator are connected to pulleys connected to the output shaft of the prime mover via a belt and arranged in parallel on the rolling plate The prime mover is supported through the vibration isolating means.

  According to the vibration type compactor of the present invention, the pulley on the side of the exciter is eccentric from the center and is attached to the pulley shaft. Therefore, when the rotation speed exceeds a certain rotation, the rotation and vibration are in a phase shifted by 180 °. Therefore, the pulley is in a substantially stationary state, the distance between the shafts with the pulley on the prime mover side is stabilized, the belt undulation phenomenon is eliminated, and the belt wear, damage and breakage can be eliminated.

  Also, the prime mover side and the compaction plate are connected via vibration proof means consisting of a combination of vibration proof rubber and metal springs arranged in parallel, and the weight on the prime mover side is shared by the vibration proof rubber and spring. Therefore, vibration attenuation due to internal resistance of the anti-vibration rubber can be suppressed, and vibrations with large vibration speed, acceleration and amplitude can be obtained, work efficiency can be improved, rolling force can be increased, A vibration body can be obtained.

  Preferred embodiments of the present invention will be described in detail below. In the figure, (1) shows a vibration type compaction machine according to the present invention, and (2) is a prime mover, which is mounted on a compaction plate (3) via an anti-vibration rubber (4) and a metal spring (5). The Reference numeral (6) denotes an oscillator, which includes a pulley (7), a pendulum (8) comprising a weight, and a pulley shaft (9) that pivotally supports the pendulum (8), and is fixed on the rolling plate (3). The pulley (7) on the vibration generator side is connected to the pulley (11) on the prime mover side via the belt (10), and the driving force is transmitted. The pulley (11) on the prime mover is preferably connected to the output shaft of the prime mover via a centrifugal clutch. The belt is preferably a V belt.

  Referring to FIGS. 2 and 3, the present invention relates to such a vibratory compactor (1), in which the pulley (7) on the side of the vibrator is eccentric from the center (7c) and is supported on the pulley shaft (9). It was made to be characterized. The amount of eccentricity (C) from the pulley center (7c) to the pulley shaft (9) is ½ of the amplitude. Further, the eccentric direction is eccentric so that the center (7c) of the pulley is located on the center of gravity (8a) side of the pendulum with respect to the axis of the pendulum. In this way, the pulley (7) on the side of the vibrator is decentered by 1/2 of the vibration amplitude and attached to the pulley shaft (9). Is reached, the harmonic vibration state is reached. In this harmonic vibration state, the rotation and vibration, that is, the rotation of the pendulum (8) and the vibration of the exciter (6) are phase-shifted by 180 ° and have a constant swing width (both amplitudes). Accordingly, by decentering the pulley on the side of the vibration generator by a half amount of the swing width (both amplitudes), the pulley is maintained in a stationary positional relationship. In the illustrated embodiment, the swing width is set to 2.4 mm, and the eccentricity is set to 1/2, which is 1.2 mm.

  Referring to FIG. 2, FIG. 2 (a) shows a stationary state, and the center (7c) of the pulley (7) is eccentric by an eccentric amount C with respect to the pulley shaft (9). The prime mover (2) is started and the pulley (7) on the side of the vibration generator is driven and rotated via the belt (10). Immediately after start-up, the engine is in an unstable rotational state, but when this unstable state is exceeded and a certain rotational range (vibration region) is reached, the rotation of the pendulum and the vibration of the exciter shift by 180 ° and remain constant. And a harmonic vibration state. The movement of the pendulum (8) and the oscillator (6) in this harmonic vibration state will be described with reference to FIGS. 2 (b), (c), (d), and (e). The rotation rotates counterclockwise from b to c, d, e.

  In the harmonic vibration state, as shown in FIG. 2b, the pendulum (8) is directed upward in the vertical direction, whereas the oscillator (6) is directed downward in the vertical direction and is stationary ( 2a) is lowered by an amplitude C ′, which coincides with the amount of eccentricity of the pulley (7). In FIG. 2c, the pendulum (8) is directed to the left in the horizontal direction, while the vibrator (6) is directed to the right in the horizontal direction, and C ′ vibrates in the right direction with respect to a stationary state. ing. In FIG. 2d, the pendulum (8) and the exciter (6) are opposite to those of FIG. 2b, and the exciter (6) is raised by a width C 'with respect to the stationary state. Finally, in FIG. 2e, the pendulum (8) and the exciter (6) are opposite to those of FIG. 2c, and the exciter (6) moves to the left by a width C ′ relative to the stationary state. ing. Therefore, a vibration having an amplitude twice that of C 'is generated between FIGS. 2b and 2d, and a vibration having an amplitude twice that of C' is also generated between FIGS. 2c and 2e. As described above, since C ′ is 1.2 mm, vibration with an amplitude of 2.4 mm, which is twice this, is generated.

  In this harmonic vibration state, the rotation center of the pulley (7) coincides with the axial center of the pulley shaft (9) in the stationary state, as shown in FIGS. Thus, the distance between the shafts of the pulley (11) on the prime mover side and the pulley (7) on the exciter side is substantially unchanged and is in a stationary state. There is no risk of the wavy phenomenon or the like occurring in the belt (10), and it is possible to avoid damage or breakage of the belt.

  The prime mover (2) and the compaction plate (3) are supported via the anti-vibration rubber (4) as described above, and simultaneously supported via the metal spring (5). That is, the prime mover (2) is supported on the rolling plate (3) by vibration isolating means comprising a combination of the vibration isolating rubber (4) and the metal spring (5) arranged in parallel. When the vibration isolating rubber is supported by itself, the vibration is attenuated by the internal resistance of the rubber as described above. Therefore, when the supporting mass is increased, the damping rate is increased, and there is a problem that sufficient vibration cannot be obtained. As in the present invention, by using the anti-vibration rubber and the metal spring in combination, it is possible to suppress the increase in the vibration damping rate while securing a sufficient support mass and obtain sufficient vibration.

  The combination of the anti-vibration rubber and the metal spring is not limited to the structure in which both of the illustrations are separated. Even if the metal spring is arranged on the outer periphery of the anti-vibration rubber, the metal spring is inserted inside the anti-vibration rubber. It is good also as a structure to do. In this way, by using a support structure that combines a vibration-proof rubber and a metal spring, the amplitude of the vibration generating body also increases, so that the rolling force increases, the forward speed at the time of rolling increases, and the working efficiency improves. . As a result, the mass of the superstructure is not limited, and vibration rolling force and efficiency in accordance with the original design concept can be generated.

Side view of the compactor according to the present invention Explanatory drawing which shows operation | movement of the pendulum of this invention, a pulley, and a vibration body Sectional view showing mounting structure of pendulum and pulley

Explanation of symbols

(1) Compressor
(2) Motor
(3) Rolling plate
(4) Anti-vibration rubber
(5) Metal spring
(6) Vibration body
(7) Pulley
(8) Pendulum
(9) Pulley shaft
(10) Belt
(11) Pulley

Claims (3)

  It consists of a compaction plate, a prime mover, and a vibration body. The prime mover is mounted on the compaction plate via vibration isolation means, and the vibration generator is fixedly arranged on the compression plate. The pulley on the side of the exciter is connected to a pulley connected to the output shaft of the prime mover via a belt, and the pulley on the side of the exciter has a center of the pendulum with respect to the axis of the pendulum. A vibration type compacting machine characterized by being eccentrically positioned so as to be located on the center of gravity side and supported by a pulley shaft.   2. The compactor according to claim 1, wherein the amount of eccentricity of the pulley on the side of the vibrator is ½ of the amplitude of vibration. It consists of a compaction plate, a prime mover, and a vibration body. The prime mover is mounted on the compaction plate via vibration isolation means, and the vibration generator is fixedly arranged on the compression plate. A combination of anti-vibration rubber and metal springs provided with supported pulleys and pendulums, wherein the pulleys on the side of the vibrator are connected to pulleys connected to the output shaft of the prime mover via a belt and arranged in parallel on the rolling plate A vibration type rolling plate characterized by supporting a prime mover through vibration isolation means.

Images