JPH01290801A - Oscillation roller - Google Patents

Abstract

PURPOSE:To allow a switch-over between horizontal oscillation and vertical oscillation to be made within a rolling wheel by providing a variable eccentric weight for a pair of exciting shafts provided for the rolling wheel wherein the weight slips in phase when rotation is changed in direction, and thereby changing rotating direction of the exciting shafts. CONSTITUTION:When a gear 25 fixed on a drive shaft 25 is rotated, the rotation is transmitted to an exciting shaft 7 on the side of an eccentric mass 9 via a driven gear 26. And an exciting shaft 8 on the side of an eccentric mass 10 is concurrently rotated in the reverse direction via a driven gear 27 and a gear 28. In this case, the eccentric mass 9 is fixed at the center of the exciting shaft 7, meanwhile, the eccentric mass 10 allows its movable eccentric weight 10c to be engaged with a play with the exciting shaft 8 so that the weight starts rotating by letting a pin 10d come in contact with the weight, when the rotation is therefore changed in direction, its phase is thereby changed by 180 deg.. This constitution allows a position where both of the eccentric masses 9 and 10 are directed to the same direction, to be changed by 90 deg. from a position where each of them is directed to each opposite direction depending on the rotating direction, thereby letting a switch-over between horizontal oscillation and vertical oscillation be made.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a vibrating roller having a vibration mechanism inside the rolling wheel used in a compaction machine for road surfaces, etc., and in particular, it relates to a vibrating roller having a vibration mechanism inside the rolling wheel. This invention relates to a vibrating roller that can switch vertical vibration.

[Conventional technology]

Conventionally, as a vibration mechanism for a vibrating roller in a compaction machine, an eccentric mass is attached to a rotating shaft provided on a rolling wheel along the center line of rotation of the rolling wheel, and by rotating the rotating shaft, the rolling wheel is rotated. It is well known to vibrate vertically with respect to the grounding part of the machine. However, in the case of a vibrating roller that vibrates vertically, the vertical vibration is transmitted through the ground, so vibration exceeding the limit is not desirable in terms of vibration regulation laws.

Particularly, when construction is carried out in residential areas or near facilities where ground vibration is averse, there is a risk of vibration pollution, which limits the scope of use.

Therefore, in Japanese Patent Publication No. 61-56724, the applicant of the present application previously proposed a method in which a rotating shaft of an eccentric mass is attached to 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. The eccentric mass is rotatably provided, and the mounting position of the eccentric mass with respect to the axis of the rotating shaft is determined with respect to the direction of the vibration-generating drive shaft of the rolling wheel, and the ground contact portion of the rolling wheel is vibrated in a substantially horizontal plane. , discloses a horizontal vibration mechanism that does not generate vibration pollution.

[Problem to be solved by the invention]

However, because the conventional vertically vibrating rollers mentioned above have excellent compaction performance in relatively deep areas such as lower roadbeds, they are widely used in construction of roads and other areas where vibration pollution is not a problem except in residential areas. It has great utility value. Therefore, if possible, it is desirable to provide a vibrating roller with the functions of vertical vibration and horizontal vibration in a machine that can be easily switched depending on the construction environment.

Therefore, in Japanese Patent Application Laid-Open No. 61-257508, the applicant of the present application has proposed a vibrating roller having at least two rolling wheels, in which a vibration mechanism is attached to one of the rolling wheels to cause approximately horizontal vibration, and the other rolling wheel is provided with a vibration mechanism that causes vertical vibration. Although a vibrating roller is disclosed in which a vibrating mechanism is attached to generate the vibration and both vibrations are selectively used, it is expensive to provide separate vibrating mechanisms for both rolling wheels, and both wheels are not iron wheels. For example, one cannot be applied to compaction machines such as tire wheels.

The present invention was devised in view of the above-mentioned needs, and an object of the present invention is to provide a vibrating roller that allows switching from a horizontal vibrating mechanism to a vertical vibrating mechanism within one rolling wheel.

[Means for Solving the Problems and Their Effects] In order to achieve the above-mentioned requirements, the present invention has a pair of vibration generating shafts having eccentric masses attached thereto approximately parallel to the rotational axis of the rolling wheel. In a vibrating roller that compacts the ground by vibration by rotating vibrating shafts in opposite directions, at least one of the eccentric masses is provided with a movable eccentric weight whose phase shifts when the rotation direction of the vibrating shaft is changed, and It is characterized by being configured so that horizontal vibration and vertical vibration can be switched by changing the direction of rotation.

By adopting the above configuration, it is possible to switch from horizontal vibration to vertical vibration by changing the rotational direction of the vibration axis, so that a single device can respond to differences in construction environments.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings.

Fig. 1 is a cross-sectional view showing a rolling wheel of a vibrating roller according to a first embodiment of the present invention, and Fig. 2 is a cross-sectional view taken along the line ■-■ in Fig. 1 showing the normal rotational movement of a vibrating shaft with an eccentric mass. 3 are explanatory cross-sectional views taken along the line ■--■ in FIG. 1, showing the reverse rotation operation of the vibration shaft with an eccentric mass attached thereto.

In FIG. 1, inside the rolling wheel 2 of the vibrating roller body 1, an inner wall 4.4 having a shaft hole 3.3 formed in the center is provided at a distance, and a frame between the two inner walls 4, 4 is provided. A vibration mechanism 6 is housed within the body 5. The vibration mechanism 6 includes a pair of vibration shafts 7 and 8 spaced approximately the same distance from the center of rotation of the rolling wheel 2, and an eccentric shaft ff19 with approximately the same mass provided at the center of the vibration shafts 7 and 8.
．． 10, a gear train 11 for rotationally driving the eccentric body 119, 10, and a vibration motor 12 as main parts. Hollow shaft portions 1 are provided on both sides of the frame 5.
3a and 13b are integrally formed, and the shaft portion 13a on the left side in the figure is supported by a dish-shaped support 14, and the support 14 is fixed to the frame 16 via vibration isolating rubber 15.15. has been done.

On the other hand, the rolling wheels 2 have shaft holes 3 in each inner wall 4.4 of the rolling wheels 2.
, 3 are provided with bearings 17, 3 on the shaft portions 13a, 13b of the frame 5,
17, 17.17, the drive member 18 fixed to the inner wall 4 is rotated by the drive motor 19 and a deceleration mechanism (not shown), so that the shaft portion 13a of the frame 5 , 13b are configured to be transferred around the center. 20 is a drive motor 19
The support body 20 is made of anti-vibration rubber 15°15
It is fixed to the frame 16 via.

The vibration motor 12 is fixed to a frame 5 and a support 14 integrated with the frame 5, and includes an output shaft of the motor 12 and a drive shaft 22 connected to the output shaft via a coupling 21. is supported by bearings 23, 23 in such a manner that it passes through the axis of the shaft portion 13a of the frame body 5. The eccentric masses 9 and 10 are fixed to vibration shafts 7 and 8, respectively, which are perpendicular to the road surface. Bearing 24, 24°24 on 5b
．． 24. Power is transmitted to the vibration shaft 7.8 through the gear train 11. That is,
When the gear 25 fixed to the drive shaft 22 rotates, the driven gear 26 meshing with it rotates, and the vibration shaft 7 on the eccentric mass 9 side rotates, causing the drive gear fixed to the vibration shaft 7 to rotate. 2
7 rotates the gear 28, and the vibration generating shaft 8 on the eccentric mass 10 side
rotates in the opposite direction to the vibration axis 7.

The eccentric mass 9 is fixedly provided at the center of the vibration shaft 7, and the eccentric mass 10 is a pair of protruding plates 10a fixed near the center of the vibration shaft 8.

10b and the vibration axis 8 between the protruding plates 10a and 10b.
The movable eccentric way 10c is loosely fitted into the movable eccentric way 10c and becomes rotatable only when abutted by a pin 10d inserted between the projecting plates 10a and 10b. Therefore, when the direction of rotation of the eccentric mass 10 is changed, the phase shifts by 180 degrees.

Of course, the mXr (mass x eccentricity N) of the eccentric mass 10 is the same as mXr (mass x eccentricity amount) of the eccentric mass 9. In this embodiment, the mutual relationship between the eccentricities N9 and 10 and the eccentric position are set as follows during normal rotation (the eccentric mass 9 is counterclockwise and the eccentric mass 10 is clockwise). That is,
As shown in FIG. 2, the eccentric mass 9.10 is the eccentric mass 9.
When the eccentric parts 10 are in the vertical state, there is a phase difference of 180 degrees, and when they are in the horizontal state, they have the same horizontal phase.

With this configuration, when the vibration motor 12 rotates in the forward direction, as shown in FIG. A vibration force in the Q direction (rightward) acts on the grounding part, and in state (d), both eccentric masses 9 and 10 in the figure face leftward, so the grounding part of the rolling wheel 2 faces in the P direction (leftward). Vibration force works. (a) state and (C) state are mutually eccentric 19.1
When 0 is downward, it is upward, and when 0 is upward, it is downward, so the centrifugal forces cancel each other out. Therefore, rolling wheel 2
The ground-contact part of the machine vibrates horizontally in the front-back direction.

Next, when the vibration motor 12 is rotated in the reverse direction, the pin 10d of the eccentric mass 10 plays 180 degrees, and the eccentric mass 9 advances 180 degrees first, so that the eccentric part of the eccentric mass ff19.10 is in the vertical position as shown in FIG. , the phase is the same in the vertical direction,
When in the horizontal state, there will be a phase difference of 180 degrees. That is, as shown in FIG. 3, in the state (a), both eccentric masses 9° and 10 are directed upward in the figure, so a vibration force directed in the R direction (upward) acts on the ground contact portion of the rolling wheel 2. (C
) in the figure, both eccentric masses 9 and 10 are directed downward, so a vibration force directed in the S direction (downward) acts on the ground contact portion of the rolling wheel 2. Therefore, the ground contact portion of the rolling wheel 2 vibrates in the vertical direction.

In this way, the present invention has a movable eccentric weight 1 having an eccentric mass 10.
0c is loosely fitted into the vibration generating shaft 8 and rotates only when the pin 10d comes into contact with it, so by changing the direction of rotation, horizontal vibration and vertical vibration can be switched, and no power other than the vibration motor is required. It can be easily operated by installing switches etc. in the cockpit etc.

Next, a second embodiment of the present invention will be described. FIG. 4 is a sectional view showing the main part of the rolling wheel of the vibrating roller according to the second embodiment of the present invention, and FIG. Fig. 6 is a cross-sectional view taken along the line ■-V in Fig. 4, showing the reverse rotational movement of the vibration shaft with the eccentric mass attached thereto.

Components that are the same as those in FIG. 1 are designated by the same reference numerals, and explanations thereof will be omitted.

The second embodiment has an eccentric mass 10 in which a movable eccentric way 10c is provided on one of the excitation shafts 8 in the first embodiment, whereas a movable eccentric weight 9'c is provided on both excitation shafts 7 and 8. 10
Eccentric masses 9' and 10' are provided with 'c'. That is, a pair of protruding plates 9'a, 9'b, 10'a, 10'b each fixed to the center of both vibration generating shafts 7.8,
The protruding plates 9'a, 9'b, 10'a, and 10'b are loosely fitted to the vibration shafts 7 and 8 between the protruding plates 9'a, 9'b, 10'a, and 10'b.
9' b, 10' a.

Pier 9' d, 10' cN inserted between 10'5
;: It consists of movable eccentric weights 9'c and 10'c which become rotatable only when they are brought into close contact with each other. However, the movable eccentric weight 9'c is formed in a crescent shape with the movable range of the pin 9'd being 90 degrees, whereas the movable eccentric weight 10'c has a movable range of 270 degrees. Because it is formed into a fan shape,
When the direction of rotation is changed, the phase shifts by 180 degrees. Of course, mXr (mass x eccentricity) of the eccentric mass 9' is equal to mXr (mass x eccentricity) of the eccentric mass 10' and the path -
It becomes. In this embodiment, the eccentricity i amount 9', 1
The mutual relationship of 0' and the eccentric position are set as follows for normal rotation (eccentric mass 9' is clockwise, eccentric mass i10' is counterclockwise). That is, as shown in FIG. 5, the eccentric mass 9'
, 10' have a phase difference of 180 degrees when the eccentric parts of the eccentric masses 9' and 10' are in the vertical state, and have the same horizontal phase when in the horizontal state.

With this configuration, when the vibration motor 12 rotates in the forward direction, as shown in FIG. A vibration force in the Q direction (rightward direction) acts on the grounding part of No. 2, and in the state (d), the eccentric mass 9' in the figure.

10' both face leftward, a vibration force directed in the P direction (leftward direction) acts on the ground contact portion of the rolling wheel 2. (a) Condition.

In state (C), when the eccentrics ft9' and ft10' are facing upward, they are facing downward, and when they are facing downward, they are facing upward, so that the centrifugal forces cancel each other out. Therefore, the ground contact portion of the rolling wheel 2 performs horizontal vibration in the front-rear direction.

Next, when the vibration motor 12 is rotated in the reverse direction, the pin 9'd of the eccentric mass 9' plays 90 degrees, and the pin 10'd of the eccentric mass 10'
As shown in Figure 6, the eccentric mass 9'
, 10' have the same vertical phase when they are in the vertical state, and have a phase difference of 180 degrees when they are in the horizontal state. That is, as shown in FIG. 6, (a)
In state (C), both eccentric masses 9' and 10' point downward in the figure, so a vibration force acting in the S direction (downward) acts on the ground contact part of the rolling wheel 2. ff
Since both 19' and 10' face upward, a vibration force directed in the R direction (upward) acts on the ground contact portion of the rolling wheel 2. Therefore,
The ground contact portion of the rolling wheel 2 performs vertical vibration in the vertical direction.

In this manner, in the second embodiment as well, by changing the direction of rotation as in the first embodiment, it is possible to switch between horizontal vibration and vertical vibration, and the same effects can be achieved.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications and embodiments may be made without departing from the spirit of the invention. For example, as a means for changing the rotation direction, in the embodiment, the vibration motor is capable of forward and reverse rotation, but the rotation direction may also be changed by attaching and removing an idle gear within the gear train. Further, in the embodiment, the vibration axis is arranged vertically with respect to the road surface, but it may be arranged horizontally.

[Effects of the Invention] As explained above, according to the vibrating roller of the present invention, it is possible to switch between horizontal vibration and vertical vibration simply by changing the rotation direction of the vibration axis, so that unnecessary drive devices and mechanisms are not required. There is no need to install one, and a single unit can easily adapt to different construction environments.

[Brief explanation of the drawing]

FIG. 1 of the embodiment diagrams is a sectional view showing a rolling wheel of a vibrating roller according to a first embodiment of the present invention, and FIG. ■ Line cross section explanatory diagram, 3rd
The figure is an explanatory cross-sectional view taken along the line ■-■ of FIG. 1 showing the reverse rotation of the vibrating shaft with an eccentric mass attached, and FIG. A cross-sectional view, and FIG. 5 is V-v in FIG.
FIG. 6 is a cross-sectional view taken along the line V--V in FIG. 4 showing the reverse rotation of the vibration shaft with an eccentric mass. 1... Vibration roller body 2... Rolling wheel 6... Vibration mechanism 7, 8... Vibration shaft 9.9', 10.
10'...Eccentric mass 9' a, 9' b, 10a, 1
0b, 10' a. 10'b...Protruding plate 9'c, 10c, 10'c--Movable eccentric weight 9
'd, 10d, 10' d...Pin 11...Gear train 12...Excitation motor Fig. 2a) ,,'
b,':(c):
d) Figure 3 (a) (b) (C) (d) Figure 4 7'' Figure 5 (Q g (br r(
c) (d:\O

Claims (1)

[Claims] A vibrating roller having a pair of vibration generating shafts having eccentric masses attached thereto substantially parallel to the rotational axis of the rolling wheel, and compacting the ground by vibration by rotating the vibration generating shafts in opposite directions, wherein at least one of the eccentric masses is attached to the vibration roller. A movable eccentric weight whose phase shifts when the rotational direction of the vibration generating shaft is changed is provided, and the structure is configured such that horizontal vibration and vertical vibration can be switched by changing the rotational direction of the vibration generating shaft. vibrating roller.