JPH0516483B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a vibration mechanism for a compaction machine.

[Conventional technology]

Conventionally, as a means of vibrating the rolling wheels in order to improve compaction efficiency in compaction machines, an eccentric weight is attached to the rotating shaft provided on the rolling wheel along the rotational center line of the rolling wheel, and the rotating shaft is rotated. This causes the rolling wheels to vibrate up and down with respect to the ground contact portion of the rolling wheels. Since this conventional technology transmits vertical vibrations through the ground, it has the disadvantage of generating vibration pollution when installed in residential areas or near facilities that do not like ground vibration, and also has disadvantages such as hitting and destroying the aggregate of the paving mixture. It was hot.

Therefore, in Japanese Patent Application No. 58-61408, the present applicant has already provided a rotating shaft of an eccentric mass on a rolling wheel so that the center line of rotation of the rotating shaft is located on a straight line parallel to the radial direction of the rolling wheel. , is rotatably provided, and the eccentric mounting position of each eccentric mass with respect to the axis of the rotating shaft is determined with respect to the direction of the vibration-generating drive axis of the rolling wheel, and the ground contact portion of the rolling wheel is caused to vibrate in a horizontal plane by rotating. Discloses a vibration mechanism for a compaction machine configured as follows, and as an embodiment thereof, two rotating shafts are provided at left and right positions on a straight line parallel to the radial direction of the rolling wheels, and We have proposed a method in which vibrations are synergized in the entire circumferential direction, left-right direction, or front-back direction of the ground-contacting part of the rolling wheel within a horizontal plane by arranging the eccentric positions at opposite positions or in the same direction, but various compaction performance After repeated tests and experiments, we found that vibration in the entire circumferential direction had the best compaction performance. In other words, the vibration in the entire circumferential direction causes the soil particles on the ground surface to shake or knead in a cyclical manner, resulting in a suitable kneading effect, which has a very beneficial effect on water permeability, airtightness, etc. In addition to achieving better performance results in terms of compaction degree compared to vibrations in the left-right or front-back directions.

[Problem that the invention seeks to solve]

However, the left-right vibration, which is a component of the vibration in the circumferential direction, acts as a force in the left-right direction (compression direction) of the suspension rubber, so vibrations that cannot be absorbed by the suspension rubber are transmitted to the frame body.
The problem remained that it caused fatigue to the pilot. This problem is caused by the fact that as the vibration force increases, the vibration force in the left-right direction also increases proportionally.

The present invention has been improved and devised in view of the above points, and aims to provide a vibration mechanism for a compaction machine that has good compaction performance, reduces transmission of vibration to the frame body, and reduces operator fatigue. be.

[Means for solving problems and their effects]

In order to solve the above-mentioned problems, the present invention rotates a rotating shaft having a rotation center line on a straight line substantially orthogonal to the rotation center line of the rolling wheel, and each having an eccentric mass at the outer end. By this, in the vibration mechanism of the compaction machine that vibrates the ground contact part of the rolling wheel in a substantially horizontal plane, a straight line perpendicular to the rotational center line of the rolling wheel is formed at a plurality of positions substantially on the rotational center line of the rolling wheel. A plurality of rotating shafts each having an eccentric mass are attached to the outer end so as to be located on a straight line in the direction of the component, and at a certain point during the rotation of each rotating shaft, a specific rotating shaft among the plurality of rotating shafts is attached. When the eccentric mass on one side is eccentric in one axial direction of the rotational center line of the rolling wheel, the eccentric mass on the other side of the specific rotating shaft or the eccentric mass on one side or the other side of the other rotating shaft One part is eccentric in the same direction as the eccentric direction of the eccentric mass on one side of the specific rotating shaft, and the other part is eccentric in the opposite direction to the eccentric direction of the eccentric mass on one side of the specific rotating shaft. The present invention is characterized in that at least one of the eccentric masses which are eccentric and in the eccentric positional relationship with each other is constructed by changing the eccentric moment.

By adopting the above configuration, the compaction machine generates elliptical circumferential or circular vibrations with a small vibration force in the left and right directions and a large vibration force in the front and back directions in the horizontal plane. Since rolling is carried out by rolling, a good kneading effect works, improving water permeability and
In addition to exhibiting excellent effects such as airtightness, the vibration force in the left and right direction is small, so the transmission of vibration to the frame body is extremely reduced.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. FIG. 1 is a side view illustrating a compaction machine 1 to which a vibration mechanism according to the present invention is applied. Reference numeral 2 denotes a vehicle chassis on which a prime mover, a traveling device, a steering device, a driver's seat, etc. are provided, and 3 indicates running wheels provided on the vehicle chassis 2. A frame 5 that supports rolling wheels 4 is attached to the chassis 2 via connecting pins 6.

FIG. 2 is a sectional view showing a first embodiment of the present invention. Mounting seats 7, 7 are provided on the left and right sides of the frame 5, and suspension rubber 8,
Mounting bodies 9, 9 are fixed via 8.

On the other hand, side plates 10 and 11 are provided inside the rolling wheel 4, and a hollow boss shaft 12 is fixed to the center of the right side plate 10. The boss shaft 12 is pivotally supported by the mounting bodies 9, 9 via bearings 13, 13.

A hydraulic motor 14 for excitation, which can rotate forward and reverse, is fixed to the center of the mounting body 9 on the right side, and the hydraulic motor 14
The output shaft is connected via a coupling to a hollow boss shaft 12 and a vibration driving shaft 15 that penetrates the right side plate 10 and extends to the left. The drive shaft 15
is pivotally supported on the right side plate 10 via bearings 16, 16, and the side plate 1 of the drive shaft 15 is
One drive bevel gear 17 is provided at the 0-side tip.

Further, on the inner surface of the right side plate 10, brackets 21 and 2 are provided on both sides of the rotation center line A of the rolling wheel 4.
1 and 21 are provided. The brackets 21, 21, 21 have rotation center lines B and C on straight lines orthogonal to the rotation center line A of the rolling wheels 4 at a plurality of positions on the rotation center line A of the rolling wheels 4, And, so as to be located on a straight line in a direction whose component is a straight line perpendicular to the rotation center line A of the rolling wheel 4,
The first rotating shaft 18a and the second rotating shaft 18b are diametrically connected to the bearings 19, 19, 19 and 2.
It is pivotally supported via 0, 20, 20.

A driven bevel gear 22 is provided approximately at the center of the first rotating shaft 18a located close to the drive bevel gear 17, and a driven bevel gear 22 is provided near the drive bevel gear 17 at the tip of the drive shaft 15.
mesh with. The drive spur gear 23 provided at the middle of the first rotating shaft 18a meshes with the driven spur gear 24 provided at the middle of the second rotating shaft 18b. Drive spur gear 23 and driven spur gear 2
4 are each configured with the same number of teeth. At both outer ends of the first rotating shaft 18a and the second rotating shaft 18b, eccentric masses 25 having the same mass are provided.
a, 25b and 25c, 25d are attached. Note that a wheel motor 26 that drives the rolling wheels 4 is fixed to the left mounting body 9.

The eccentric masses 25a, 25b and 25c, 25
The mutual relationship of each eccentric position of d is determined as follows in the first example. That is, when the eccentric mass 25a at the one outer end of the first rotating shaft is eccentric in one direction in the axial direction of the vibration driving shaft 15,
The eccentric mass 25b at the other outer end is the vibration driving shaft 1
5 in the other axial direction, that is, the eccentric mass 25a at the outer end of one side. The eccentric mass 25c at the outer end of one side is arranged in the same direction as the eccentric direction of the eccentric mass 25b at the outer end of the other side of the first rotating shaft, and also at the outer end of the other side of the second rotating shaft. The eccentric mass 25d is eccentric in the same direction as the eccentric direction of the eccentric mass 25a at one outer end of the first rotating shaft.

Moreover, the eccentric masses 25a, 25b and 25
The mutual relationship between the masses c and 25d is determined as follows. That is, the eccentric mass 25a at the outer end on one side of the first rotating shaft and the eccentric mass 25d at the outer end on the other side of the second rotating shaft have the same mass. The eccentric mass 25b at the outer end on the other side and the eccentric mass 25c at the outer end on one side of the second rotating shaft have the same mass, and the former (25a, 25d) is larger than the latter (25b, 25c). The mass is set to be large. That is, 25a=25d>
The relationship is 25b=25c.

Next, the operation of the vibration mechanism according to the first embodiment will be explained. With the compaction machine 1 stopped running, the hydraulic motor 14 connects the rotating shaft via the output shaft, the coupling, the vibration driving shaft 15, the driving bevel gear 17, the driven bevel gear 22, the driving spur gear 23, and the driven spur gear 24. When 18a and 18b are rotated as indicated by the arrows, the outer peripheral end of the eccentric mass 25a rotates around the rotation center line B in the order of positions F, E, D, and G in FIG. 3, and the outer peripheral end of the eccentric mass 25b rotates in the same manner. D′, G′,
The outer peripheral end of the eccentric mass 25c rotates in the order of H', I', J', and K' around the rotation center line C, and the outer peripheral end of the eccentric mass 25d rotates in the same order. J,
Rotate in the order of K, H, and I.

Since the eccentric positions of each eccentric mass 25a, 25b, 25c, and 25d have the above-mentioned relationship, when the outer peripheral end of the eccentric mass 25a is at position F at one point during this rotation, the outer peripheral end of the eccentric mass 25c is Take the position H′. At this point, the outer peripheral end of the eccentric mass 25b is at position D', and the eccentric mass 25d
The outer peripheral edge of takes the position J.

At this time, the centrifugal forces directed from position B to F, from position C to H', from position B to D', and from position C to J are
Expressed by BF, BH', BD' and CJ, respectively, centrifugal forces BF and CH' and centrifugal forces BD' and CJ act in directions that cancel each other out, but the resultant vector of centrifugal forces is are BF−CH′ and CJ−BD′,
The directions are from B to F and from C to J, and as a result, centrifugal force acts from H to F. Therefore, a force α (FIG. 2) acts that causes the rolling wheel 4 to vibrate to the right.

Similarly, when the outer peripheral end of eccentric mass 25a is at position D at one point during rotation, the outer peripheral end of eccentric mass 25c is at position J'. At this point, the outer peripheral end of the eccentric mass 25b is at position F', and the outer peripheral end of the eccentric mass 25d is at position H.

At this time, position B to D, position C to J', position B
If the centrifugal forces directed from F' to F' and from position C to H are respectively expressed as BD, CJ', BF' and CH, centrifugal forces BD and CJ' and centrifugal forces BF' and CH cancel each other out. However, the resultant vector of centrifugal force has magnitudes BD−CJ′ and CH−BF′,
The directions are from B to D and from C to H, and as a result, centrifugal force acts from F to H. Therefore, a force β (FIG. 2) acts that causes the rolling wheel 4 to vibrate to the left.

Furthermore, when the outer circumferential end of the eccentric mass 25a is at position E at one point during rotation, the outer circumferential end of the eccentric mass 25b is at position G'. At this point, the outer peripheral end of the eccentric mass 25c is at position I', and the outer peripheral end of the eccentric mass 25d is at position K. At this time, as shown in FIG. 4, forces that rotate in the L direction (circumferential direction) act on the rolling wheel 4 almost synergistically. Therefore, a force θ (FIG. 2) in the longitudinal direction is applied to the ground contact portion of the rolling wheel 4 in parallel with the ground.

Similarly, at one point during rotation, when the outer circumferential end of eccentric mass 25a is at position G, the outer circumferential end of eccentric mass 25b is at position E'. At this point, the outer peripheral end of the eccentric mass 25c is at position K', and
The outer peripheral end of the eccentric mass 25d takes the position I. At this time, in contrast to the above, a force that rotates in the M direction (circumferential direction) in FIG. 4 acts on the rolling wheel 4 almost synergistically. This force is expressed as γ (Figure 2).

In this way, the eccentric masses 25a, 25b, 25
When c and 25d rotate, the centrifugal force vector α ~ θ ~ that changes moment by moment with respect to the ground contact part of the rolling wheel 4
β to γ to α act, and this grounding portion vibrates on an elliptical circumference on a horizontal plane, as shown by arrow W in FIG.

Also, while running the compaction machine 1, the eccentric mass 2
When rotating 5a, 25b, 25c, 25d,
The ground contact portion of the rolling wheels 4 performs a horizontal movement that is a combination of the above-mentioned horizontal vibration and the forward or backward movement associated with running. Therefore, whether the compaction machine 1 is running or not, the eccentric masses 25a, 25b, 25c, 25
When compaction work is performed by rotating d, the rolling wheels 4 move to shake or cyclically knead the soil particles on the ground surface, causing destruction of the aggregate of the paving mix and occurrence of hair cracks. This eliminates the problem and improves the efficiency of compaction.

In addition, since the compaction action is performed in the horizontal direction, due to the characteristics of the ground, the vibration damping efficiency of the ground is greater than that of vertical vibrations. Therefore, it is useful for compaction work near facilities where ground vibration is averse, and for construction of residential roads with many residences. In addition to the advantage of significantly reducing vibration pollution, the longitudinal vibrations (forces in the γ and θ directions in Fig. 2) generated as shown in Fig. Since it acts only as a rotational moment, the rotating shaft of the rolling wheel does not receive vibration.

Therefore, no vibration acts on the suspension rubber, and the vibrations in the left and right directions that occur (the forces in the α and β directions in Figure 2) are small in magnitude, and furthermore, the vibrations in the suspension rubber act in the compression direction. Since the shearing force acts as a force, and the direction of the force changes from the vertical load and driving force of the machine body, the shearing force is a very small value, so the suspension rubber that can withstand this force must be soft and have a small spring constant. It naturally has a high vibration-proofing effect, which reduces the transmission of vibration to the frame body, which has the advantage of reducing operator fatigue.

Furthermore, the compaction machine of the present invention performs compaction using elliptical circumferential or circular vibrations that have a small vibration force in the left-right direction and a large vibration force in the front-rear direction with respect to the direction of movement in the horizontal plane. Because of this, even if there is a large vibration force, the effect of vibration on the suspension rubber is small, and a good kneading effect works just like the vibration in the circumferential direction.As shown in Figs. 14 and 15, the degree of compaction is Also in terms of water permeability, it exhibits extremely superior effects compared to conventional vibrations only in the front-rear direction or left-right direction. That is, Fig. 14, 1st
Figure 5 shows the degree of compaction and hydraulic conductivity measured against the number of compactions under the following test conditions.

Machine weight 6300Kg Rolling wheel load 3150Kg Rolling wheel diameter x width 1050φ x 1450mm Vibration frequency 3100vpm Vibration force 5100Kg Vehicle speed 2Km/h Road surface condition Bituminous mixture dense 6cm As shown in Figures 14 and 15, for example When the number of compactions is 8, the compaction degree of the present invention is 101%.
On the other hand, the conventional vibration only in the longitudinal and lateral directions has a water permeability of 98%, while the water permeability coefficient of the present invention is 2.5×
10 ^-7 cm/sec, whereas the conventional one is 4×10 ^-7
cm/sec, and the vibration of the present invention shows superior results in all cases.

The first embodiment has eccentric masses 25a, 25b and 25 at both the first and second rotating outer ends as described above.
The eccentric positions of c and 25d are determined to be mutually symmetrical, and 25a=25d>25d=25
The mass conditions are set to satisfy the relationship c.
And eccentric masses 25a, 25b, 25c, 25
The rotation of d generates an excitation force, causing the rolling wheel 4 to vibrate in the left-right direction within a horizontal plane.

By the way, the excitation force F is F=mrω ² (where m is the total mass of the object, r is the eccentric distance, and m・
Since r is the eccentric moment and ω is the rotational angular velocity, setting the mass condition as above naturally applies even when the proportional eccentricity distance, that is, the radius of rotation r around the axis, is changed. The same conditions can be set for That is, if the rotational angular velocity ω is constant, each eccentric mass 25a, 25b, 25c, 25
The masses of d are made equal, and the eccentric distances of the eccentric mass 25a at the outer end on one side of the first rotating shaft and the eccentric mass 25d at the outer end on the other side of the second rotating shaft are
Eccentric mass 25b at the outer end on the other side of the first rotating shaft and eccentric mass 25c at the outer end on one side of the second rotating shaft
It is obvious that the same excitation force can be obtained even if the relationship is set to be larger than the respective eccentric distances.

Therefore, depending on the vibration mechanism of the compaction machine in the first embodiment, even if the eccentric distance is changed instead of changing the mass size of the eccentric mass, and in some cases, the rotation Even if the length of the shaft is changed, the total centrifugal force generated by eccentric masses pointing in one direction will similarly differ from the total centrifugal force generated by eccentric masses pointing in the other direction. can produce the same effect. This also applies to the second to fourth embodiments described below.

Therefore, the term "eccentric mass" as used herein includes the meaning of "eccentric distance" which is in a proportional relationship, and shall mean "eccentric moment".

Next, a second embodiment will be explained based on FIG.

In this second embodiment, the configuration other than the mass conditions of the eccentric mass, the number of rotating shafts of the eccentric mass, and the method of attaching the eccentric mass is the same as the first embodiment, so the same members are given the same reference numerals and will not be described. Omitted.

In the second embodiment, the brackets 21, 21, 21 provided on both sides of the rotation center line A of the rolling wheel 4 have rotation center lines B and C on the diametrical straight line orthogonal to the rotation center line A of the rolling ring 4. In addition to the first and second rotating shafts 18a and 18b in the first embodiment having
A third rotating shaft 18c having a rotational center line X is pivotally supported via bearings 28, 28, 28.

A driven spur gear 2 having the same number of teeth as the driving spur gear 23 of the first rotating shaft and the driven spur gear 24 of the second rotating shaft is provided in the middle of the third rotating shaft 18c.
9 is provided, and the driven spur gear 24 of the second rotating shaft
It is configured to mesh with the shaft and receive rotational transmission. At both outer ends of the first rotating shaft 18a, the second rotating shaft 18b, and the third rotating shaft 18c,
Eccentric masses 27a, 27b, 27c, 2, respectively
7d and 27e and 27f are attached.

The eccentric masses 27a, 27b, 27c, 27
The mutual relationship between the eccentric positions of d and 27e and 27f is determined as follows. That is, the eccentric mass 27a at one outer end of the first rotating shaft is
When the vibration driving shaft 15 is eccentric in one axial direction, the eccentric mass 27b at the other outer end is equal to the eccentric mass 27a at the other axial end of the vibration driving shaft 15, that is, one outer end. The eccentric mass 27c at the outer end of one side of the second rotating shaft is eccentric in the opposite direction (direction with a 180° different positional relationship) from the eccentric direction of the first rotating shaft. It is eccentric in the same direction as the eccentric direction of the eccentric mass 27b at the other outer end. Furthermore, the eccentric mass 27b at the other outer end of the second rotating shaft is eccentric in the same direction as the eccentric mass 27a at the one outer end of the first rotating shaft, and Eccentric masses 27e, 2 at the outer ends of one side and the other side of the rotating shaft of No. 3
7f is eccentric in the same direction as the eccentric direction of the eccentric masses 27a and 27b at the outer ends of one side and the other side of the first rotating shaft.

On the other hand, the eccentric masses 27a, 27b,
The mutual relationship between the masses c, 27d and 27e, 27f is determined as follows. That is, the eccentric mass 27 at the outer end of one side of the first and third rotating shafts
a and 27e have the same mass, and the eccentric masses 27b and 27f at the outer ends on one side of the first and third rotating shafts are also set to have the same mass. The mass of the eccentric mass 27d at the other outer end of the second rotating shaft is equal to the mass of the first eccentric mass 27d.
and the sum of the respective masses of the eccentric masses 27a and 27e at the outer end on one side of the third rotating shaft, and the eccentric mass 27c at the outer end on one side of the second rotating shaft is equal to and the mass of the eccentric masses 27b and 27f at the other outer end of the third rotating shaft, and the former 27d is equal to the latter 27
The mass is larger than c, that is, 27a + 27e = 27
The relationship is d>27c=27b+27f.

Next, the operation of the vibration mechanism according to the second embodiment will be explained. With the compaction machine 1 stopped running, the hydraulic motor 14 operates the output shaft, the coupling, the vibration drive shaft 15, the drive bevel gear 17, the driven bevel gear 22, the drive spur gear 23, and the driven spur gears 24, 29.
When the rotating shafts 18a, 18b, 18c are rotated as shown by the arrows, the eccentric mass 27 in FIG.
The outer peripheral end of a is located at position F, centering on rotation center line B.
E, D, G rotate in this order, the outer peripheral end of the eccentric mass 27b similarly rotates in the order of D', G', F', E', and the outer peripheral end of the eccentric mass 27c rotates in the opposite direction around the rotation center line C. The eccentric mass 27d rotates in the order of H′, I′, J′, K′.
Similarly, the outer peripheral edge of rotates in the order of J, K, H, I,
The outer peripheral end of the eccentric mass 27e rotates in the order of P, O, N, and Q about the rotation center line X, and the outer peripheral end of the eccentric mass 27f rotates in the order of N', Q', and O'.

Each eccentric mass 27a, 27b, 27c, 27d,
Since the eccentric positions of 27e and 27f have the above-mentioned relationship, when the outer peripheral end of the eccentric mass 27a is at the position F at one point during this rotation, the outer peripheral end of the eccentric mass 27e is at the position P, and the eccentric The outer peripheral end of the mass 27c takes the position H'. At this point, the outer peripheral end of the eccentric mass 27b is at position D', the outer peripheral end of eccentric mass 27f is at position N', and the outer peripheral end of eccentric mass 27d is at position J.

At this time, position B to F, position X to P, position C
The centrifugal forces from H' to H', from position B to D', from position
Expressed as XP, CH′, BD′, XN′ and CJ, centrifugal force
BF, XP and CH' and centrifugal force BD', XN' and CJ act in directions that cancel each other out, but the resultant vector of centrifugal force has a magnitude of (BF +
CH' and CJ-(BD'+XN'), the direction is from B to F, from X to P and from C to J,
As a result, centrifugal force acts from N toward F. Therefore, a force α (FIG. 5) acts that causes the rolling wheel 4 to vibrate to the right.

Similarly, at one point during rotation, when the outer end of the eccentric mass 27A is at position D, the outer peripheral end of the eccentric mass 27e is at position N, and the outer peripheral end of eccentric mass 27c is at position J'. . At this point, the outer peripheral end of the eccentric mass 27b is at position F', and the outer peripheral end of the eccentric mass 27f is at position P', and the eccentric mass 27b is at position F'.
The outer peripheral end of 7d takes the H position.

At this time, position B to D, position X to N, position C
from J', from position B to F', from position X to P' and from position C
The centrifugal forces directed from H to BD, XN,
Expressed by CJ′, BF′, XP′ and CH, centrifugal force BD,
XN and CJ' and centrifugal forces BF',
CH−(BF′+XP′), and its direction is from B to D to X
The direction is from N to N and from C to H, and as a result, centrifugal force acts from F to N. Therefore, a force β (FIG. 5) acts that causes the rolling wheel 4 to vibrate to the left.

Furthermore, when the outer circumferential end of the eccentric mass 27a is at position E at one point during rotation, the outer circumferential end of the eccentric mass 27b is at position G'. At this point, the eccentric mass 2
The outer peripheral end of 7c is at position I', the outer peripheral end of eccentric mass 27d is at position K, and the outer peripheral end of eccentric mass 27e is at position K.
The outer peripheral end of is at position O, and the outer peripheral end of eccentric mass 27f is at position Q'. At this time, as shown in FIG. 7, a force that rotates in the L direction (circumferential direction) acts synergistically on the rolling wheel 4. Therefore, a force θ (FIG. 5) in the longitudinal direction is applied to the ground contact portion of the rolling wheel 4 in parallel with the ground.

Similarly, at one point during rotation, when the outer circumferential end of eccentric mass 27a is at position G, the outer circumferential end of eccentric mass 27b is at position E'. At this point, the eccentric mass 2
The outer peripheral end of 7c is at position K', and the eccentric mass 27d
The outer peripheral end of takes the position I, and the eccentric mass 27
The outer peripheral end of e is at position Q, and the outer peripheral end of eccentric mass 27f is at position O'. At this time, contrary to the above,
Forces that rotate in the M direction (circumferential direction) in FIG. 4 act synergistically on the rolling wheel 4. This force is γ (Fig. 5)
Expressed as

In this way, the eccentric masses 25a, 25b, 25
When the wheels c, 25d, 25e, and 25f rotate, centrifugal force vectors α~θ~β~γ~α that change from time to time act on the ground contact part of the rolling wheel 4, and this ground contact part As shown by arrow W, it vibrates on an elliptical circumference on a horizontal plane.

Therefore, this embodiment operates in the same manner as the first embodiment and provides similar effects.

Next, a third embodiment will be explained based on FIG.

The third embodiment differs from the first embodiment in that at a plurality of positions on the rotation center line A of the rolling wheels 4, the rotation center lines B and C are arranged on a straight line orthogonal to the rotation center line A of the rolling wheels 4.
The first rotating shaft and the second rotating shaft are pivotally supported in the diametrical direction so as to be located on a straight line in a direction including a straight line perpendicular to the rotational center line A of the rolling wheel 4. However, the difference is that the first rotational shafts and the second rotational shafts are provided to face each other in the radial direction. Since this embodiment is the same as the first embodiment except for the way in which the eccentric mass is attached, the same members are given the same reference numerals and their explanations will be omitted.

Brackets 21a, 21a, 21 provided on the inner surface of the side plate 10 sandwiching the rotation center line A of the rolling wheel 4.
a, 21a have rotation center lines b and C on a straight line orthogonal to the rotation center line A of the rolling wheel 4 at a plurality of positions on the rotation center line A of the rolling wheel 4, and
First rotating shafts 18c, 18d and second rotating shafts 18e, radially opposed to each other so as to be located on a straight line whose component is a straight line perpendicular to the rotational center line A of the rolling wheel 4. 18f, bearing 19
a, 19a, 19a, 19a and 20a, 20
It is pivotally supported via a, 20a, 20a.

Driven bevel gears 22a and 22b are provided at the inner ends of the first rotating shafts 18c and 18d, respectively, and the drive bevel gear 1 provided at the tip of the drive shaft 18
Mesh with 7. And each first rotating shaft 18c,
Drive spur gear 23a provided in the middle of 18d,
23b meshes with driven spur gears 24a and 24b provided at intermediate portions of the second rotating shafts 18e and 18f, respectively. The driving spur gears 23a, 23b and the driven spur gears 24a, 24b each have the same number of teeth. Each of the first rotating shafts 18c, 18d
Eccentric masses 30a, 30 having the same mass are provided at both outer ends of the second rotating shafts 18e, 18f, respectively.
b, 30c, and 30d are attached.

The eccentric masses 30a, 30b and 30c, 30
The mutual relationship of each eccentric position of d is determined as follows. That is, when the eccentric mass 30a at the outer end on one side of the first rotating shaft is eccentric in the other axial direction of the vibration driving shaft 15, the eccentric mass 30b at the outer end on the other side is also eccentric in the same direction. At this time, the eccentric masses 30c, 30d at the outer ends on one side and the other side of the second rotating shaft are the eccentric masses 30a, 30d at the outer ends on one side and the other side of the first rotating shaft. 3
It is eccentric in a direction opposite to the eccentric direction of 0b (a direction in which the positional relationship is different by 180 degrees).

Moreover, the eccentric masses 30a, 30b and 30
The mutual relationship between the masses c and 30d is determined as follows. That is, the eccentric masses 30a and 30b at both outer ends of the first rotating shaft have the same mass, and the eccentric masses 30c and 30d at both outer ends of the second rotating shaft also have the same mass, And the latter (30c, 30d) is the former (3
0a, 30b) is set to have a larger mass. That is, 30c=30d>30a=
30b.Next, the operation of the vibration mechanism according to the third embodiment will be explained. With the compaction machine 1 stopped running, the hydraulic motor 14 operates the output shaft, the coupling, the vibration drive shaft 15, the drive bevel gear, and the driven bevel gear 2.
2a, 22b, driving spur gears 23a, 23b, driven spur gears 24a, 24b, and rotating shafts 18a, 1.
When 8d, 18e, and 18f are rotated as indicated by the arrows, the outer peripheral end of the eccentric mass 30a rotates around the rotation center line B in the order of positions D, E, F, and G in FIG. 9, and the outer peripheral end of the eccentric mass 30b On the contrary, position D,
Rotate in the order of G, F, and E. Also, eccentric mass 30
The outer peripheral end of c is located at positions J, I, and around the rotation center line C.
The outer peripheral end of the eccentric mass 30d rotates in the order of positions J, K, H, and I.

Since the eccentric positions of each eccentric mass 30a, 30b, 30c, and 30d have the above-mentioned relationship, when the outer peripheral end of the eccentric mass 30a is at position D at one point during this rotation, the outer peripheral end of the eccentric mass 30b is also Take position D. At this point, the outer peripheral end of the eccentric mass 30c is at position J, and the outer peripheral end of the eccentric mass 30d is also at position J.

At this time, if the centrifugal forces from position B to D and from position C to J are represented by BD and CJ, respectively, B
The centrifugal force from C to D and the centrifugal force from C to J act in directions that cancel each other out, but the resultant vector of centrifugal forces has a magnitude of BD - CJ,
The direction is from H to F, and therefore the force α that causes the rolling wheel 4 to vibrate to the right (Fig. 8)
acts.

Similarly, when the outer circumferential end of eccentric mass 30a is at position F at one point during rotation, the outer circumferential end of eccentric mass 30b also assumes position F. At this point, the outer peripheral end of the eccentric mass 30c is at position H, and the outer peripheral end of the eccentric mass 30d is also at position H.

At this time, if the centrifugal forces from position B to F and from position C to H are expressed as BF and CH, respectively, B
The centrifugal force from C to F and the centrifugal force from C to H act in directions that cancel each other out, but the resultant vector of centrifugal forces has a magnitude of CH - BF,
The direction is from F to H, and therefore, the force β that causes the rolling wheel 4 to vibrate to the left (Fig. 8)
acts.

Further, when the outer circumferential end of the eccentric mass 30a is at position E at one point during rotation, the outer circumferential end of the eccentric mass 30b is at position G. At this point, the outer peripheral end of the eccentric mass 30c is at position I, and the outer peripheral end of the eccentric mass 30d is also at position K. At this time,
As shown in FIG. 10, forces that rotate in the L direction (circumferential direction) act on the rolling wheel 4 almost synergistically. Therefore, a force θ (FIG. 8) in the longitudinal direction is applied to the ground contact portion of the rolling wheel 4 in parallel with the ground.

Similarly, when the outer circumferential end of eccentric mass 30a is at position G at one point during rotation, the outer circumferential end of eccentric mass 30b is also at position E. At this point, the outer peripheral end of the eccentric mass 30c is at position K, and the outer peripheral end of the eccentric mass 30d is also at position I. At this time, in contrast to the above, forces that rotate the rolling wheel 4 in the M direction (circumferential direction) in FIG. 10 act almost synergistically. This force is represented by γ (Figure 8).

In this way, the eccentric masses 30a, 30b, 30
When c and 30d rotate, the centrifugal force vector α ~ θ ~ that changes moment by moment with respect to the ground contact part of the rolling wheel 4
β to γ to α act, and this grounding portion vibrates on an elliptical circumference on a horizontal plane, as shown by arrow W in FIG.

Therefore, this embodiment operates in the same manner as the first and second embodiments, and provides similar effects.

Next, a fourth embodiment will be explained based on FIG. 11. This fourth embodiment is different from the second embodiment except that the first, second, and third rotating shafts are supported radially opposite each other, and the manner in which the eccentric mass is attached and the mass conditions are different. Since it is the same as the example, the same reference numerals are given to the same members and the description thereof will be omitted.

Brackets 21a, 21a, which are provided on the inner surfaces of the side plates 10, 11 across the rotational center line A of the rolling wheel 4,
21a, 21a, at a plurality of positions on the rotation center line A of the rolling wheel 4, the rotation center lines B and CX are on a straight line perpendicular to the rotation center line A of the rolling wheel 4 and are opposed in the radial direction. 1 each rotating shaft 18c,
In addition to 18d and the second rotating shafts 18e and 18f, third rotating shafts 18g and 18h are supported via bearings 31, 31, 31, and 31, respectively.

Driven bevel gears 22a and 22b are provided at the inner ends of the first rotating shafts 18c and 18d, respectively, and the driving bevel gear 1 provided at the tip of the drive shaft 15
Mesh with 7. And each first rotating shaft 18c,
Drive spur gear 23a provided in the middle of 18d,
23b is a driven spur gear 24a, 24b, and 32 provided in the middle of each of the second rotating shafts 18e, 18f and the third rotating shafts 18g, 18h.
a and 32b, respectively.

Drive spur gears 23a, 23b and driven spur gear 24
a, 24b and 32a, 32b each have the same number of teeth. Each of the first rotating shafts 1
Eccentric masses 33a, 33 of equal mass are provided at both outer ends of the second rotating shafts 18e, 18f, and the third rotating shafts 18g, 18h, respectively.
b, 33c, 33d, and 33e, 33f are attached.

The eccentric masses 33a, 33b, 33c, 33
The mutual relationship between the eccentric positions of d and 33e and 33f is determined as follows. That is, the eccentric mass 33a at one outer end of the first rotating shaft is
When the vibration generating drive shaft 15 is eccentric in the other axial direction, the eccentric mass 33b at the outer end on the other side is also eccentric in the same direction, and at this time, the outer ends on one side and the other side of the second rotating shaft are eccentric. Eccentric mass 33c, 33d at the opposite end
is eccentric in the direction opposite to the eccentric direction of the eccentric masses 33a and 33b at the outer ends of one side and the other side of the first rotating shaft (a direction in which the positional relationship differs by 180 degrees), and the third Eccentric masses 33g and 33f at the outer ends of one side and the other side of the rotating shaft are the first
It is eccentric in the same direction as the eccentric direction of the eccentric masses 33a and 33b at the outer ends of one side and the other side of the rotating shaft.

In addition, the eccentric masses 33a, 33b,
The mutual relationship between the masses c, 33d and masses 33e, 33f is determined as follows. That is, the first
and eccentric masses 33a at both outer ends of the third rotating shaft,
The masses of the eccentric masses 33b, 33e and 33f, and the eccentric masses 33c and 33d at both outer ends of the second rotating shaft are set to be equal. And eccentric masses 33c at both outer ends of the second rotating shaft,
33d is the sum of the respective masses of the eccentric masses 33a, 33b at the outer ends on one side of the first and third rotating shafts, and the eccentric masses 33b, 33 at the outer ends on the other side.
greater than the sum of the respective masses of f, that is, 3
3c=33d>33a+33e=33b+33f
The relationship between

Next, the operation of the vibration mechanism according to the fourth embodiment will be explained. With the compaction machine 1 stopped running, the hydraulic motor 14 operates the output shaft, the coupling, the vibration drive shaft 15, the drive bevel gear 17, the driven bevel gears 22a, 22b, the drive spur gears 23a, 23b,
When the rotating shafts 18c, 18d, 18e, 18f, 18g, and 18h are rotated as shown by the arrows via the driven spur gears 24a, 24b, 32a, and 32b, the outer peripheral end of the eccentric mass 33a is aligned with the rotation center line B in FIG. The center rotates in the order of positions D, E, F, and G, and the outer peripheral end of the eccentric mass 33b similarly rotates at positions D, E, F, and G.
Rotates in the order of G, F, E, and the outer peripheral end of the eccentric mass 33c rotates at positions J, I,
The outer peripheral end of the eccentric mass 33d rotates in the order of J, K, H, I, and the outer peripheral end of the eccentric mass 33e rotates in the order of N, O, P, Q around the rotation center line X. The outer circumference of the eccentric mass 33f rotates, and the outer peripheral ends of the eccentric mass 33f are N, Q,
Rotate in the order of P and O.

Each eccentric mass 33a, 33b, 33c, 33d,
Since the eccentric positions of 33e and 33f have the above-mentioned relationship, when the outer peripheral end of eccentric mass 33a is at position D at one point during this rotation, the outer peripheral end of eccentric mass 33b also assumes position D. At this point, the outer peripheral end of the eccentric mass 33c is at the position J, the outer peripheral end of the eccentric mass 33d is also at the position J, and the outer peripheral end of the eccentric mass 33e is at the position N.
The outer peripheral end of 3f also takes the N position.

At this time, each centrifugal force from position B to D, from position X to N, and from position C to J is expressed as BD,
Expressed as XN and CJ, centrifugal forces BD and XN and centrifugal force CJ act in directions that cancel each other out, but the resultant vector of centrifugal forces has a magnitude of CJ
-(BD +

Similarly, when the outer circumferential end of eccentric mass 33a is at position F at one point during rotation, the outer circumferential end of eccentric mass 33b also assumes position F. At this point, the outer circumferential end of the eccentric mass 33c is at the position H, the outer circumferential end of the eccentric mass 33d is also at the position H, and the outer circumferential end of the eccentric mass 33e is at the position P.
The outer peripheral end of 3f also takes the position P.

At this time, the centrifugal forces from position B to F, from position X to P, and from position C to H are BF, XP, respectively.
Expressed in and CH, centrifugal force BF and centrifugal force XP
CH acts in directions that cancel each other out, but the resultant vector of centrifugal force has a magnitude of CH
-(BF +

Further, when the outer circumferential end of the eccentric mass 33a is at position E at one point during rotation, the outer circumferential end of the eccentric mass 33b is at position G. At this point, the eccentric mass 33
The outer peripheral end of c is at position I, the outer peripheral end of eccentric mass 33d is at position K, the outer peripheral end of eccentric mass 33e is at position O, and the outer peripheral end of eccentric mass 33f is at position Q. At this time, as shown in FIG. 13, forces that rotate in the L direction (circumferential direction) act on the rolling wheel 4 almost synergistically. Therefore, a force θ (11th
Figure) is in effect.

Similarly, when the outer circumferential end of eccentric mass 33a is at position G at one point during rotation, the outer circumferential end of eccentric mass 33b is at position E. At this point, the eccentric mass 3
The outer peripheral end of 3c is at position K, the outer peripheral end of eccentric mass 33d is at position I, and the outer peripheral end of eccentric mass 33e is at position I.
The outer peripheral end of is at position Q, and the outer peripheral end of eccentric mass 33f is at position O. At this time, contrary to the above, a force that rotates in the M direction (circumferential direction) in FIG. 13 acts synergistically on the rolling wheel 4. This force is γ (Fig. 11)
Expressed as

In this way, the eccentric masses 33a, 33b, 33
When the wheels c, 33d, 33e, and 33f rotate, a centrifugal force vector α~θ~β~γ~α that changes from time to time acts on the ground contact part of the rolling wheel 4, and this ground contact part As shown by arrow W, it vibrates on an elliptical circumference on a horizontal plane.

Therefore, this embodiment operates in the same manner as the first, second, and third embodiments, and provides similar effects.

In addition, in this fourth embodiment, the eccentric masses 33a, 3
3b, 33c, 33d and 33e, 33f, 33c=33d>33a+33e=
33b+33f, but the opposite relationship is 33c=33d<33a+33e=33b+3
Even if it is set to 3f, a similar elliptical circumferential or circular vibration can be generated.

〔Effect of the invention〕

As explained above, the present invention uses an elliptical circumferential or circular vibration that has a small vibration force in the left-right direction and a large vibration force in the front-rear direction with respect to the direction of movement in a horizontal plane in a compaction machine. Since the rolling compaction is carried out by rolling, it is possible to prevent the occurrence of vibration pollution as much as possible, and a good kneading effect works, resulting in excellent water permeability, airtightness, etc., and the vibration force in the left and right direction is small. Vibration is well absorbed by the suspension rubber, and transmission of vibration force to the frame body is extremely reduced, reducing operator fatigue.

[Brief explanation of drawings]

Fig. 1 is a side view of the compaction machine, Fig. 2 is a sectional view of a rolling wheel showing the first embodiment of the present invention, Fig. 3 is an explanatory view taken in the direction of the arrows in Fig. 2, and Fig. 4 is Fig. 2 FIG. 5 is a sectional view of a rolling wheel showing the second embodiment of the present invention, FIG. 6 is an explanatory view as viewed from the arrow in FIG.
The figure is an explanatory view taken in the direction of the arrow in FIG. 5, FIG. 8 is a sectional view of a rolling wheel showing the third embodiment of the present invention, FIG. 9 is an explanatory view taken in the direction of the arrow in FIG. 8, and FIG. FIG. 11 is a sectional view of a rolling wheel showing the fourth embodiment of the present invention, FIG. 12 is an explanatory view as viewed from the circle arrow in FIG.
Fig. 13 is an explanatory view from the double arrow in Fig. 11, Fig. 14 is a diagram showing the relationship between the degree of compaction and the number of times of compaction according to the present invention, and Fig. 15 is a diagram showing the relationship between the hydraulic conductivity and the number of times of compaction. It is a line diagram showing a relationship. 1... Compaction machine, 4... Rolling wheel, 5... Frame,
9... Mounting body, 10, 11... Side plate, 12... Boss shaft,
13... Bearing, 14... Hydraulic motor, 15... Vibrating drive shaft, 17... Drive bevel gear, 18a, 18b, 18
c, 18d, 18e, 18f, 18g, 18h...
Rotating shaft, 19, 19a, 20a...Bearing, 2
2, 22a, 22b...driven bevel gear, 23, 23
a, 23b...Drive bevel gear, 24, 24a, 24b
...Driven spur gear, 25a, 25b, 25c, 25d
...Eccentric mass, 27a, 27b, 27c, 27d,
27e, 27f... Eccentric mass, 30a, 30b, 3
0c, 30d...Eccentric mass, 33a, 33b, 33
c, 33d, 33e, 33f... Eccentric mass.

Claims (1)

[Scope of Claims] 1. By rotating a rotating shaft having a rotational center line on a straight line substantially orthogonal to the rotational center line of the rolling wheel and having an eccentric mass at each outer end, the rolling wheel can be rotated. In a vibration mechanism of a compaction machine that vibrates a ground-contacting part in a substantially horizontal plane, at a plurality of positions substantially on the rotation center line of the rolling wheel, on a straight line in a direction whose component is a straight line substantially perpendicular to the rotation center line of the rolling wheel. A plurality of rotating shafts, each having an eccentric mass at its outer end, are mounted such that the eccentric mass on one side of a particular rotating shaft among the plurality of rotating shafts is located at a certain point in time during the rotation of each rotating shaft. When the rolling wheel is eccentric in one direction in the axial direction of the center line of rotation, a part of the eccentric mass on the other side of the specific rotating shaft or the eccentric mass on one side or the other side of the other rotating shaft is The other part is eccentric in the same direction as the eccentric direction of the eccentric mass on one side of the shaft, and the other part is eccentric in the opposite direction to the eccentric direction of the eccentric mass on one side of the specific rotating shaft. A vibration mechanism for a compaction machine, characterized in that at least one of the eccentric masses having an eccentric positional relationship changes an eccentric moment. 2. The vibration mechanism for a compaction machine according to claim 1, characterized in that the size of the mass of the eccentric mass is changed in order to change the eccentric moment of the eccentric mass. 3. The vibration mechanism for a compaction machine according to claim 1, wherein the eccentric distance of the eccentric mass from the rotating shaft is changed in order to change the eccentric moment of the eccentric mass.