JPH07166511A - Vibration mechanism - Google Patents

Abstract

PURPOSE:To obtain a vibrating roller in which an eccentric weight is simply supported and its assembling is easy, by providing an exciting shaft composed of support members separately disposed opposite to each other and an eccentric weight pivotally supported so as to cross at right angles. CONSTITUTION:A rotary ring 1 is rotated by a specified angular distance by an advancing/retreating lever and fastened. A movable eccentric weight 6a is rotated around the support center shaft 6 to position the gravitational center of an exciting shaft 10 at an eccentric location against the axial center thereof in order to adjusted the vibratory stroke. The faces except the support members 18 oppositely arranged are opened to simplify the support of movable eccentric weight 6a and the assembling thereof. The exciting shaft 10 is provided in an exciting device case 3. And even when the exciting shaft 10 rotates at a high speed, the exciting device case 3 is slowly rotated so that lubricant is dropped from the upper part of the inner face of exciting device case into the inside of exciting shaft 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration mechanism in which a movable eccentric weight can be easily supported and can be easily assembled.

[0002]

2. Description of the Related Art In a vibrating device used in a vibrating compacting machine such as a vibrating roller, a vibrating pile driving machine, and other vibrating machines, an eccentric vibrating shaft is rotated to utilize a centrifugal force to vibrate. Although a mechanism for generating a force is often used, it is desirable to be able to make the vibration amplitude variable according to the work situation when performing work using the vibration device.

Taking the case of application to a vibrating roller as an example,
In order to carry out efficient compaction work, it is desirable to change the amplitude depending on the material, thickness, etc. of the compaction object. For example, when compacting thin asphalt mixture, the aggregate (stone) in the asphalt mixture is not cracked, and the surface is disturbed by a large amplitude, resulting in poor flatness. It is better to make the amplitude low so that it will not be lost. When compacting thickly exposed soil, such as when compacting roadbed material, it is better to use a high amplitude to compact the lower layers.

In order to change the vibration amplitude, it is necessary to change the amount of eccentricity of the vibration-exciting shaft. At that time, if it is possible to prevent the rotation of the vibration-exciting shaft or to reverse it, that is better. desirable. By doing so, it does not take time to switch the amplitude, cause energy loss, or damage the parts related to the oscillation axis at the time of reversal. A conventional example in which a vibrating device capable of performing the above is applied to a vibrating roller is disclosed in Japanese Laid-Open Patent Publication No.
It is disclosed in Japanese Patent Laid-Open No. 3-1367773, which is shown in FIG.
Described in.

The tubular shaft 51 has cantilever shafts 56, 5 on both sides thereof.
7 functions as a bearing, and is supported by an end plate (not shown) of the vibrating drum. Inside the tubular shaft 51, a mass element 52 is pivotally mounted on a pivot 53 passing through the center of the tubular shaft and perpendicular to it. The eccentric moment of this mass element 52 is
With the mass element 52 pivotally mounted on the pivot 53, the tubular shaft 5
1, it is possible to adjust the oscillatory movement transmitted to the drum.

This is achieved with the aid of an adjusting device consisting of a plate 55 having an elongated slot 54 which is axially adjustable inside the tubular shaft 51. One end of the plate 55 is fixed to the adjusting rod 58, and the other end is attached to the annular adjusting device 59. The pivot 53 of the mass element 52 passes through the slot 54 of the plate 55, which allows the plate 55 to slide in the longitudinal direction of the adjusting rod 58 without being obstructed by the pivot 53. The mass element 52 is provided with a drive rod 60 which extends laterally through a slot 54 provided in the plate 55. When the plate 55 is moved axially by the adjusting rod 58, the mass element 52 describes a pivoting movement by the drive rod 60, which changes the eccentric moment of the mass element 52 with respect to the tubular shaft 51, and consequently the tubular shaft 51. Vary the amplitude of the oscillatory motion generated during rotation.

[0007]

According to the above vibration device, the size of the hydraulic system and the eccentricity adjusting system can be kept to a minimum, thanks to the small adjusting force required for the pivoting movement of the mass element 52. However, it also reduces the risk of leakage in the hydraulic system and allows the desired value to be set with greater reliability.

However, the conventional vibration device has the following problems, and its improvement has been desired. 1. It is difficult to assemble the mass element 52 and the like inside the tubular shaft 51 not having an open structure, and the assembling work is not easy. 2. When vibration occurs, the tubular shaft 51 rotates at a high speed, and the lubricating oil in the tubular shaft 51 is centrifugally moved by the centrifugal force.
Lubrication oil is difficult to lubricate because it sticks to the inner wall of the engine and the lubricating oil does not reach where lubrication is required. 3. The drive rod 60 attached to the mass element 52 is moved along with the movement of the adjusting rod 58 along the slot 61 cut out in a part of the longitudinal slot 54 of the plate 55, and as a result, the mass element 52 of the mass element 52 is moved. It is designed to rotate around an axis. The notched slot 61 and the drive rod 60 rub against each other and wear causes rattling, which may make positioning difficult. 4. The entire series of variable amplitude mechanisms including the mass element 52 is enclosed in the tubular shaft 51, so that the moment of inertia of the tubular shaft 51 becomes large, and it takes time for the tubular shaft 51 to reach a predetermined rotation speed. It takes a lot of energy and requires a lot of energy. Further, even if the rotation is stopped from the predetermined rotation speed, it takes time.

An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a vibrating mechanism in which the movable eccentric weight is easily supported and is easily assembled.

[0010]

In order to achieve the above-mentioned object, the present invention provides a vibrating shaft composed of a supporting member arranged so as to be spaced apart and opposed to each other, and a vibrating member between the supporting members. A movable eccentric weight pivotally mounted in a direction orthogonal to the axis of the shaft, and an eccentric weight drive that rotates the movable eccentric weight around the axis to deviate the center of gravity of the vibrating shaft from the axis of the vibrating shaft. A vibrating mechanism characterized by having means is provided.

The eccentric weight driving means 4 is specifically an actuator 7 and a propelling shaft 7a from the actuator.
A joint 23 rotatably mounted around the propulsion shaft 7a, one end connected to the joint side and the other end connected to the movable eccentric weight side, and the deviation of the linear motion from the joint is displaced by the rotational motion about the pivot axis. It is composed of a connecting rod 8 which is changed to.

Further, the vibrating roller is characterized by including the above vibrating mechanism.

[0013]

The supporting member, which constitutes the oscillating shaft and is arranged so as to face each other with a space therebetween, pivotally mounts the movable eccentric weight in the direction perpendicular to the axis of the oscillating shaft, and the eccentric weight driving means comprises: The movable eccentric weight is rotated about the pivot axis, and the center of gravity of the vibration generating shaft is displaced with respect to the axis center of the vibration generating shaft.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment in which the vibrating mechanism of the present invention is used for a vibrating roller will be described in detail below with reference to the drawings. Figure 5
FIG. 3 is a side view of the forward / backward operating device showing the positional relationship between the forward / backward lever of the vibrating roller and the neutral position detecting means. FIG.
The operation is performed by selecting the position B / reverse position C and operating the forward / reverse operation device 70 which gives a traveling drive system a command to advance / stop. As a mechanism, the operation arm 3 mounted on the base shaft 31 is used.
2 is configured to interlock with the forward / backward lever 30, and a control lever 34 for changing the rotation direction and the rotation speed of the variable displacement pump 33 for traveling drive is connected to the operating arm 32 via a control cable 35. The swing stroke of the operating arm 32 is transmitted to the control lever 34.

A cam 36 is integrally formed on the base shaft 31, and a frame 3 to which a forward / backward lever 30 is attached.
7 is provided with a neutral position detection limit switch 38 as a forward / reverse lever neutral position detecting means. The neutral position detection limit switch 38 is moved by the movement of the cam 36.
It is detected whether the forward / backward lever 30 is in the forward drive position A, the reverse drive position C, or the neutral position B.

FIG. 1 is a plan sectional view showing an embodiment of a vibrating device for a variable amplitude vibrating roller according to the present invention. In FIG. 1, left and right end plates 2 and 2'are provided separately in the rolling wheel 1, and an exciter case 3 is attached integrally with the end plates 2 and 2 '. A variable-amplitude vibrating mechanism 4, which will be described later, is housed inside the exciter case 3. A support 13A is attached to the left frame 11 via a vibration isolation member 12A, and a traveling drive motor 14 with a reduction gear is attached to the support 13A. Since the rotation drive unit 14a of the traveling drive motor 14 with a speed reducer is fixed to the end plate 2 of the rolling wheel 1, the rolling wheel 1 rolls due to the rotational driving.

On the other hand, a support 13B is attached to the right frame 11 'via a vibration isolator 12B.
3B bearing member 13B ', through the bearing 16 through the shaft hole 17
Mount the wheel set 17 having a. The wheel axle 17 is fixed to the right end plate 2. Inside the exciter case 3, 2
The plate-shaped support members 18, 18 are arranged so as to be spaced apart and face each other. Then, the pivot 6 having the eccentric weight 6a is pivotally mounted between the plate-shaped support members 18, 18. A lid member 19 is attached to the left end portions of the plate-shaped support members 18 and 18,
A boss member 20 formed on the lid member 19 is axially supported by a support body 21 provided on the left side of the vibrating case 3 via a bearing 22.

A cylindrical guide case 10a for guiding a joint 23, which will be described later, is integrally attached to the right end portions of the plate-like support members 18, 18, and the right end thereof is attached to the wheel axle 17.
To support. At the right end of the cylindrical guide case 10a, one end of a shaft 24 having a shaft hole 24a formed in the center is spline-coupled, and a gear 25 is attached near the other end of the shaft 24. A hydraulic cylinder 7 is mounted as an actuator via a support member 26 at a position of the end portion of the bearing member 13B ′ of the right support 13B that is coincident with the axis of the rolling wheel 1. The rod 7a, which is the propelling shaft from the hydraulic cylinder 7, is inserted into the shaft hole 24a of the shaft 24, and the joint 23 is provided at the tip end portion thereof. The joint 23 is rotatably supported on the rod 7a side via a bearing 27. One end of the connecting rod 8 is connected to the joint 23. The other end of the connecting rod 8 is connected to the movable eccentric weight 6a side, and changes the deviation of the linear motion from the joint 23 into the displacement of the rotary motion around the pivot 6.

At the end of the bearing member 13B 'of the right support 13B, at a position different from the axis of the rolling wheel 1,
The drive motor 9 for vibration is installed via the support member 28, the gear 29 is attached to the drive shaft 9a thereof, and the gear 29 is engaged with the gear 25 attached to the shaft 24 to drive the drive motor 9 for vibration. Is transmitted to the shaft 24. Therefore, each of the shaft 24, the plate-shaped support members 18, 18 and the boss member 20 constitutes the vibration generating shaft 10 in the present invention. The hydraulic cylinder 7, its rod 7 a, the joint 23 and the connecting rod 8 each constitute the eccentric weight driving means 4.

Although the hydraulic cylinder is used as the actuator in the above embodiment, other conventionally known actuators such as an electric motor and a solenoid may be used.

When the vibration of the vibrating roller is stopped, the rod 7a of the hydraulic cylinder 7 is positioned so that the center of gravity of the vibrating shaft 10 is located at the axial center of the vibrating shaft 10, as shown in FIG.
To extend the eccentric weight 6a to the upright state,
The weight distribution of the eccentric weight 6a is made uniform. On the other hand, when applying vibration to the vibrating roller, the hydraulic cylinder 7
2 is retracted, and as shown in FIG. 2 (b),
The eccentric weight 6a is rotated about the pivot shaft 6 so that the eccentric weight 6a is biased to one side with respect to the vibration generating shaft 10, and the center of gravity of the vibration generating shaft 10 is displaced with respect to the shaft center of the vibration generating shaft 10.

In this case, the center of gravity of the vibrating shaft 10 is
2 (a) positioned at the axis center of the eccentric weight 6
FIG. 2 (b) in which a is rotated about the pivot 6 by about 90 °
In the state shown by the solid line, the eccentric weight 6a is largely biased to one side with respect to the vibration generating shaft 10, and the amplitude of vibration becomes high (H). Similarly, when the eccentric weight 6a is rotated about the pivot 6 by about 45 ° and brought to the state shown by the chain line in the figure, the eccentric weight 6a is less biased with respect to the oscillation shaft 10,
The amplitude of vibration is low (L). The switching between the high amplitude and the low amplitude is performed by the amplitude changeover switch 43 which operates the variable amplitude control means 40 shown in FIGS.

The variable amplitude control means 40 refers to the signal circuit diagram shown in FIG. 3 and the hydraulic circuit diagram shown in FIG. 4, and the hydraulic pump 47 and the hydraulic cylinder 7 arranged on the axis of the vibration shaft 10. From the hydraulic pump 47, the rod 7a, the joint 23 rotatably attached around the axis of the rod 7a, the connecting rod 8 having one end connected to the joint side and the other end connected to the eccentric weight 6a side. It is composed of a switching valve 44 and the like interposed in a hydraulic circuit that supplies pressure oil to the hydraulic cylinder 7.

In FIGS. 3 and 4, in the hydraulic pressure supply circuit connected to the hydraulic pump 41 for supplying pressure oil to the vibration hydraulic motor 9, a vibration mode for operating the electromagnetic valve 42 which is a switching valve. An amplitude changeover switch 43 as setting means is provided. This amplitude selector switch 43
Is set to a low amplitude (L) or a high amplitude (H), a signal is always sent to the electromagnetic coil Sol1 of the electromagnetic valve 42, pressure oil is supplied from the hydraulic pump 41, and vibration is generated. The hydraulic motor 9 is rotating, so that the vibrating shaft 10 is rotating in a predetermined direction.

On the other hand, in order to move the eccentric weight 6a of the oscillating shaft 10 to displace the center of gravity of the oscillating shaft with respect to the axial center of the oscillating shaft, a hydraulic pressure for supplying pressure oil from the hydraulic pump 47 to the hydraulic cylinder 7 is used. A switching valve 44 is provided in the circuit. The neutral position detection limit switch 38 is the forward / reverse lever 30.
When the neutral (N) set position is detected, a signal is sent to the electromagnetic coil Sol2 of the switching valve 44 to extend the rod 7a of the hydraulic cylinder 7. Then, by setting the eccentric weight 6a to be upright, as shown in FIG. 2A, the center of gravity of the vibration generating shaft 10 is located at the center of the vibration generating shaft 10.

Further, with the amplitude changeover switch 43 set to low amplitude (L) or high amplitude (H), the neutral position detection limit switch 38 moves the forward / reverse lever 30 forward (F) or backward ( When the position R) is being detected, a signal is sent to the electromagnetic coil Sol3 of the switching valve 44, causing the rod 7a of the hydraulic cylinder 7 to retract. Then, the eccentric weight 6a is biased with respect to the vibration generating shaft 10 so that the center of gravity of the vibration generating shaft 10 is deviated from the axial center position of the vibration generating shaft 10.

For example, when the amplitude changeover switch 43 is set to a low amplitude (L), the eccentricity detecting means for detecting the eccentricity of the oscillating shaft is provided at a substantially intermediate position of the main body of the hydraulic cylinder 7. L position sensor 45 which is a sensor
However, the cylinder rod 7a is retracted to a predetermined length, and the eccentric weight 6a is brought into the state shown by the chain line in FIG. 2B to reduce the bias of the eccentric weight 6a with respect to the vibration generating shaft 10 and suppress the vibration amplitude. When the amplitude changeover switch 43 is set to a high amplitude (H), the H position sensor 46 similarly retracts the cylinder rod 7a to the rear end position, and the state shown by the solid line in (b) of FIG. Then, the eccentric weight 6a is largely biased to one side with respect to the vibration generating shaft 10 to increase the amplitude of vibration. Reference numeral 39 in FIG. 3 is an automatic manual changeover switch for switching between automatic and manual.

In the above example, the eccentricity amount detecting sensor as the oscillating shaft eccentricity amount detecting means is provided in the cylinder body.
We explained the case of setting high amplitude and low amplitude at one place, but by adding a sensor, the rotation angle of the eccentric weight can be changed more finely, which makes the vibration amplitude variable in multiple stages. A vibrating roller vibrating device can be realized. Also, by mounting a proportional position sensor, it is possible to change infinitely.

Next, the operation of the oscillating device for the variable-amplitude vibrating roller having the above structure will be described. When performing the compaction work on the road surface, the vibration roller operator first
The forward / reverse lever 30 is set to the neutral position B, and the amplitude selector switch 43 is switched from the off state to the low amplitude (L) or the high amplitude (H) depending on the condition of the road surface to be compacted. By this switching operation, the electromagnetic coil Sol1 of the electromagnetic valve 42
Is sent to the hydraulic pump 41 to supply pressure oil,
The hydraulic motor 9 for vibration is rotated, and the vibration shaft 10 is rotated in a predetermined direction. In this state, since the forward / backward lever 30 is in the neutral position B, the neutral position detection limit switch 38 sends a neutral position signal, the rod 7a of the hydraulic cylinder 7 is extended, and the center of gravity of the vibrating shaft 10 is equal to that of the vibrating shaft 10. Located at the center of the axis,
The excitation force becomes zero.

When the forward / reverse lever 30 is operated from the neutral position B to the forward position A with the amplitude selector switch 43 set to the high amplitude (H), the electromagnetic coil S of the selector valve 44 is changed.
A signal is sent to ol3, and at the same time, the H position sensor 46 of the hydraulic cylinder 7 operates to retract the cylinder rod 7a to the rear end position. Therefore, the eccentric weight 6a is attached to the oscillating shaft 10
, The vibrating roller vibrates with a high amplitude.

When the forward / reverse lever 30 is set to the forward position A and compacted for a predetermined distance and then folded back to the reverse position C, the forward / backward lever 30 is temporarily returned to the neutral position B. In such a method of stopping the rotation of the vibration-exciting shaft, the roll resonates by passing through the resonance points of the roll and the frame and the roll and the ground in the process from the steady state where the vibration-exciting shaft is rotating to the stopped state. Will end up. However, in the vibrating roller of the present embodiment, even when the forward / reverse lever is set to the neutral position, the amplitude changeover switch 43 is still set to the high amplitude (H), so the vibrating shaft 10 continues to rotate. Then, the neutral position detection limit switch 38 associated with the movement of the forward / backward lever 30 to the neutral position B moves the switching valve 44.
Since the neutral position signal is sent to the electromagnetic coil Sol2, the vibration axis 10 continues to rotate, but the amplitude of vibration is zero. Next, when the forward / reverse lever 30 is operated to the reverse position C, the vibrating roller vibrates with a high amplitude as in the case of the forward movement.

During the compaction work, the amplitude changeover switch 43
When switching from high amplitude (H) to low amplitude (L), the forward / reverse lever 30 is once returned to the neutral position B and the amplitude changeover switch 43 is changed over. When the forward / reverse lever 30 is operated to the forward drive position A or the reverse drive position B,
A signal is sent to the electromagnetic coil Sol3 of the switching valve 44, the L position sensor 45 of the hydraulic cylinder 7 operates, the cylinder rod 7a is extended to a predetermined length, and the deviation of the eccentric weight 6a with respect to the oscillating shaft 10 is reduced. Keep the amplitude of.

When the forward / reverse lever is operated from the forward position to the reverse position via the neutral position (or vice versa), the rod of the hydraulic cylinder that has been in the retracted state at the neutral position is temporarily extended and raised. When the center of gravity of the vibration shaft is located at the shaft center of the vibration shaft, and when it is moved to the forward or reverse position, the cylinder rod is retracted again and the vibration shaft is eccentric, causing vibration. There is a possibility that a time lag will occur between the forward / backward movement of the vibrating roller and the expansion / contraction movement of the cylinder rod due to the operation, and the vibration may not catch up.
Correspondingly to this, if the range for detecting the neutral position of the cam is enlarged, or if a well-known sequence control device is appropriately interposed between the forward / backward movement of the vibration roller and the extension / contraction operation of the cylinder rod, the operation will be more complete. Can be made.

[0034]

According to the oscillating device for the variable amplitude oscillating roller of the present invention described above, the oscillating shaft constituted by the supporting members arranged to face each other at a distance and the oscillating shaft between the supporting members. A movable eccentric weight pivotally mounted in a direction orthogonal to the axis of the vibration axis, and an eccentric weight that rotates the movable eccentric weight around the axis to displace the center of gravity of the vibration axis with respect to the axis of the vibration axis. Since the driving means is provided, the surfaces other than the supporting members arranged to face each other are open, so that the eccentric weight can be easily supported and the assembly is easy. In addition, since the oscillating shaft has such an open structure, particularly in the case of the oscillating roller, by providing the oscillating shaft in the oscillating machine case integrated with the rolling wheels, the oscillating shaft rotates at high speed. Even so, since the case of the vibrating machine only rolls slowly, it is very advantageous because the lubricating oil can be expected to drip from the upper part of the inner surface of the case of the vibrating case into the vibrating shaft. And, in order to rotate the movable eccentric weight about the pivot axis, unlike the conventional method that pushes the drive rod while rubbing it along the slot of the plate and rotationally displaces it, the connecting rod is used to rotate it smoothly. Therefore, rattling due to wear hardly occurs, and the eccentric weight can be accurately positioned.
Furthermore, since the vibration generating shaft has an open structure, the moment of inertia of the vibration generating shaft is also small, it takes no time to start and stop the vibration generating shaft, and energy loss can be reduced.

In the above embodiment, the case where the vibrating mechanism is applied to the vibrating roller has been described, but the present invention is not limited to this, and another vibrating compacting machine,
It can be applied to vibrating pile driver and other vibrating devices.

[Brief description of drawings]

FIG. 1 is a plan sectional view showing an embodiment in which a vibrating mechanism of the present invention is used for a vibrating roller.

2 (a) and 2 (b) are side views showing a state of variable amplitude of the vibration mechanism according to the present invention.

FIG. 3 is a signal circuit diagram of the vibration mechanism according to the present invention.

FIG. 4 is a hydraulic circuit diagram of the vibration mechanism according to the present invention.

FIG. 5 is a side view of the forward / backward operating device showing the positional relationship between the forward / backward lever of the vibrating roller and the neutral position detecting means.

FIG. 6 is a perspective view of a conventional vibration device.

[Explanation of symbols]

 1 ... Rolling wheels 2, 2 '... End plate 3 ... Exciter case 4 ... Eccentric weight drive means 6 ... Axis 6a ... Eccentric weight 7 ... Hydraulic cylinder 7a ... Cylinder rod 8 ... Connecting rod 9 ... Excitation drive motor -Turn 10 ... Shaking shafts 18, 18 ... Plate-shaped support member 23 ... Joint 30 ... Forward / backward lever 38 ... Neutral position detection limit switch 40 ... Variable amplitude control means 41 ... Hydraulic pump 42 ... Electromagnetic valve 43 ... Amplitude changeover switch 44 ... Switching valve 45 ... L position sensor 46 ... H position sensor 47 ... Hydraulic pump 70 ... Forward / reverse operation device

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[Procedure amendment]

[Submission date] March 15, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

The eccentric weight driving means 4 is specifically an actuator 7 and a propelling shaft 7a from the actuator.
A joint 23 rotatably mounted around the propulsion shaft 7a, one end connected to the joint side and the other end connected to the movable eccentric weight side, and the displacement of the linear motion from the joint is converted to the displacement of the rotational motion about the pivot axis. The connecting rod 8 is changed.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment in which the vibrating mechanism of the present invention is used for a vibrating roller will be described in detail below with reference to the drawings. Figure 5
FIG. 3 is a side view of the forward / backward operating device showing the positional relationship between the forward / backward lever of the vibrating roller and the neutral position detecting means. FIG.
The operation is performed by selecting the position B / reverse position C and operating the forward / reverse operation device 70 which gives a traveling drive system a command to advance / stop. As a mechanism, the operation arm 3 mounted on the base shaft 31 is used.
2 is configured to interlock with the forward / backward lever 30, and the control lever 34 for changing the rotation direction and the rotation speed of the variable displacement hydraulic pump 33 for traveling drive is provided with the control cable 3.
It is connected to the actuating arm 32 through 5, and the swing stroke of the actuating arm 32 is transmitted to the control lever 34.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

FIG. 1 is a plan sectional view showing an embodiment of a vibrating device for a variable amplitude vibrating roller according to the present invention. In FIG. 1, left and right end plates 2 and 2'are provided separately in the rolling wheel 1, and an exciter case 3 is attached integrally with the end plates 2 and 2 '. A variable-amplitude vibrating mechanism 4, which will be described later, is housed inside the exciter case 3. A support 13A is attached to the left frame 11 via a vibration isolation member 12A, and a traveling drive hydraulic motor 14 with a speed reducer is attached to the support 13A. The hydraulic motor 14 is supplied with pressure oil from the hydraulic pump 33, and the rotary drive unit 14a of the hydraulic motor 14 is fixed to the end plate 2 of the rolling wheel 1.
The rolling drive causes the rolling wheels 1 to roll.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

A cylindrical guide case 10a for guiding a joint 23, which will be described later, is integrally attached to the right end portions of the plate-like support members 18, 18, and the right end thereof is attached to the wheel axle 17.
To support. At the right end of the cylindrical guide case 10a, one end of a shaft 24 having a shaft hole 24a formed in the center is spline-coupled, and a gear 25 is attached near the other end of the shaft 24. A hydraulic cylinder 7 is mounted as an actuator via a support member 26 at a position of the end portion of the bearing member 13B ′ of the right support 13B that is coincident with the axis of the rolling wheel 1. The rod 7a, which is the propelling shaft from the hydraulic cylinder 7, is inserted into the shaft hole 24a of the shaft 24, and the joint 23 is provided at the tip end portion thereof. The joint 23 is rotatably supported on the rod 7a side via a bearing 27. One end of the connecting rod 8 is connected to the joint 23. The other end of the connecting rod 8 is connected to the movable eccentric weight 6a side, and changes the displacement of the linear motion from the joint 23 into the displacement of the rotary motion around the pivot 6.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

At the end of the bearing member 13B 'of the right support 13B, at a position different from the axis of the rolling wheel 1,
The drive hydraulic motor 9 for vibration is installed via the support member 28, the gear 29 is attached to the drive shaft 9a thereof, and the gear 29 is engaged with the gear 25 attached to the shaft 24 to generate the drive motor for vibration. 9 is transmitted to the shaft 24. Therefore, each of the shaft 24, the plate-shaped support members 18, 18 and the boss member 20 constitutes the vibration generating shaft 10 in the present invention. The hydraulic cylinder 7, its rod 7 a, the joint 23 and the connecting rod 8 each constitute the eccentric weight driving means 4.

[Procedure correction 6]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

The variable amplitude control means 40 refers to the signal circuit diagram shown in FIG. 3 and the hydraulic circuit diagram shown in FIG. 4, and the hydraulic pump 47 and the hydraulic cylinder 7 arranged on the axis of the vibration shaft 10. A rod 7a, a joint 23 rotatably mounted around the axis of the rod 7a, a connecting rod 8 having one end connected to the joint side and the other end connected to the eccentric weight 6a side, and a hydraulic pump 47 It is composed of an electromagnetic switching valve 44 and the like provided in a hydraulic circuit that supplies pressure oil to the hydraulic cylinder 7.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Name of item to be corrected] 0024

[Correction method] Change

[Correction content]

In the signal circuit diagram shown in FIG. 3, an amplitude changeover switch 43 as an amplitude mode setting means is provided, and in the path from the hydraulic pump 41 to the hydraulic pump 41 in the hydraulic circuit diagram shown in FIG. The electromagnetic switching valve 42 is operated. In the state where the amplitude changeover switch 43 is set to the low amplitude (L) or the high amplitude (H), the electric current is always sent to the electromagnetic coil Sol1 of the electromagnetic changeover valve 42 to supply the pressure oil from the hydraulic pump 41. Thus, the hydraulic motor 9 for vibration is rotating, and thus the vibration shaft 10 is rotating in a predetermined direction.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction content]

On the other hand, in order to move the eccentric weight 6a of the oscillating shaft 10 to displace the center of gravity of the oscillating shaft with respect to the axial center of the oscillating shaft, a hydraulic pressure for supplying pressure oil from the hydraulic pump 47 to the hydraulic cylinder 7 is used. An electromagnetic switching valve 44 is provided in the circuit.
When the neutral position detection limit switch 38 detects the neutral (N) set position of the forward / reverse lever 30, a current is sent to the electromagnetic coil Sol2 of the electromagnetic switching valve 44 to extend the rod 7a of the hydraulic cylinder 7. Let Then, by setting the eccentric weight 6a to be upright, as shown in FIG. 2A, the center of gravity of the vibration generating shaft 10 is located at the center of the vibration generating shaft 10.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

Further, with the amplitude changeover switch 43 set to low amplitude (L) or high amplitude (H), the neutral position detection limit switch 38 moves the forward / reverse lever 30 forward (F) or backward ( When the position R) is being detected, a current is sent to the electromagnetic coil Sol3 of the electromagnetic switching valve 44, causing the rod 7a of the hydraulic cylinder 7 to retract. Then, the eccentric weight 6a is biased with respect to the vibration generating shaft 10 in FIG.
The center of gravity of the vibration generating shaft 10 is deviated from the axial center position of the vibration generating shaft 10 in the state shown in FIG.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

[Correction method] Change

[Correction content]

For example, when the amplitude changeover switch 43 is set to a low amplitude (L), the cylinder rod 7a is provided at a substantially intermediate position of the main body of the hydraulic cylinder 7 when it is displaced to a position corresponding to a predetermined low amplitude. Further, the L position sensor 45, which is an eccentricity amount sensor serving as an oscillating shaft eccentricity amount detection unit, stops sending current to the electromagnetic coil Sol3 of the electromagnetic switching valve 44. Then, the electromagnetic switching valve 44 is switched to the intermediate position, the supply of hydraulic oil to the hydraulic cylinder 7 is stopped, and the retracting operation of the hydraulic cylinder 7 is also stopped at that position. As a result, the eccentric weight 6a generates a low amplitude vibration while the oscillating shaft 10 rotates while maintaining a relatively small deviation from the oscillating shaft 10 shown by the chain line in FIG. 2B. Will be done. Further, the amplitude selector switch 43 is set to a high amplitude (H).
When the cylinder rod 7a passes through the position corresponding to the low amplitude and is further displaced to the position corresponding to the predetermined high amplitude, the H position sensor 4
6 stops sending current to the electromagnetic coil Sol3 of the electromagnetic switching valve 44. Then, the electromagnetic switching valve 44 is switched to the intermediate position, the supply of hydraulic oil to the hydraulic cylinder 7 is stopped, and the retracting operation of the hydraulic cylinder 7 is also stopped at that position. As a result, the eccentric weight 6a is kept largely biased with respect to the vibration generating shaft 10 shown by the solid line in FIG.
0 rotates, and high-amplitude vibration is generated. Reference numeral 39 in FIG. 3 is an automatic manual changeover switch for switching between automatic and manual operation, and selects whether to automatically generate / stop vibration or constantly vibrate according to the position of the forward / reverse lever. It is a switch.

[Procedure Amendment 11]

[Document name to be amended] Statement

[Name of item to be corrected] 0029

[Correction method] Change

[Correction content]

Next, the operation of the oscillating device for the variable-amplitude vibrating roller having the above structure will be described. When performing the compaction work on the road surface, the vibration roller operator first
The forward / reverse lever 30 is set to the neutral position B, and the amplitude selector switch 43 is switched from the off state to the low amplitude (L) or the high amplitude (H) depending on the condition of the road surface to be compacted. By this switching operation, the electromagnetic coil Sol1 of the electromagnetic switching valve 42
Current is sent to the hydraulic pump 41 to supply pressure oil from the hydraulic pump 41,
The hydraulic motor 9 for vibration is rotated, and the vibration shaft 10 is rotated in a predetermined direction. In this state, since the forward / backward lever 30 is in the neutral position B, the neutral position detection limit switch 38 sends a neutral position signal to the electromagnetic coil Sol2 of the electromagnetic switching valve 44 to extend the rod 7a of the hydraulic cylinder 7 to cause the oscillation shaft. 1
The center of gravity of 0 is located at the axial center of the vibration generating shaft 10, and even if the vibration generating shaft 10 rotates, the vibration generating force becomes zero.

[Procedure Amendment 12]

[Document name to be amended] Statement

[Name of item to be corrected] 0030

[Correction method] Change

[Correction content]

When the forward / reverse lever 30 is operated from the neutral position B to the forward position A with the amplitude selector switch 43 set to the high amplitude (H), the neutral position detection limit switch 38 causes the electromagnetic coil of the solenoid selector valve 44 to move. Stop sending electric current to Sol2, a signal is sent to electromagnetic coil Sol3, and H position sensor 4 of hydraulic cylinder 7 is sent in the same manner as described above.
6 works to retract the cylinder rod 7a to the rear end position. Therefore, the eccentric weight 6a is largely biased to one side with respect to the vibrating shaft 10, and the vibrating roller vibrates with high amplitude.

[Procedure Amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

When the forward / reverse lever 30 is set to the forward position A and compacted for a predetermined distance and then folded back to the reverse position C, the forward / backward lever 30 is temporarily returned to the neutral position B. In such a method of stopping the rotation of the vibration-exciting shaft, the roll resonates by passing through the resonance points of the roll and the frame and the roll and the ground in the process from the steady state where the vibration-exciting shaft is rotating to the stopped state. Will end up. However, in the vibrating roller of the present embodiment, even when the forward / reverse lever is set to the neutral position, the amplitude changeover switch 43 is still set to the high amplitude (H), so the vibrating shaft 10 continues to rotate. Then, the neutral position detection limit switch 38 associated with the movement of the forward / backward lever 30 to the neutral position B sends a neutral position signal to the electromagnetic coil Sol2 of the electromagnetic switching valve 44, so that the rod 7a of the hydraulic cylinder 7 is extended and raised. The center of gravity of the vibrating shaft 10 is located at the axial center of the vibrating shaft 10, and although the vibrating shaft 10 continues to rotate, the amplitude of vibration becomes zero. Next, when the forward / reverse lever 30 is operated to the reverse position C, as in the case of the forward movement,
The vibrating roller vibrates with high amplitude.

[Procedure Amendment 14]

[Document name to be amended] Statement

[Name of item to be corrected] 0032

[Correction method] Change

[Correction content]

During the compaction work, the amplitude changeover switch 43
When switching from high amplitude (H) to low amplitude (L), the forward / reverse lever 30 is once returned to the neutral position B and the amplitude changeover switch 43 is changed over. When the forward / reverse lever 30 is operated to the forward drive position A or the reverse drive position C,
The neutral position detection limit switch 38 stops sending current to the electromagnetic coil Sol2 of the electromagnetic switching valve 44, and the electromagnetic coil
A current is sent to Sol3, the L position sensor 45 of the hydraulic cylinder 7 operates, the cylinder rod 7a is extended to a predetermined length, and the vibration of the eccentric weight 6a is biased relatively little with respect to the oscillating shaft 10 and has a low amplitude. Occurs.

[Procedure Amendment 15]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of Codes] 1 ... Rolling wheels 2, 2 '... End plate 3 ... Exciter case 4 ... Eccentric weight driving means 6 ... Axis 6a ... Eccentric weight 7 ... Hydraulic cylinder 7a ... Cylinder rod 8 ... Connecting rod 9 ... Drive hydraulic motor for vibration 10 ... Vibration shafts 18, 18 ... Plate-shaped support member 23 ... Joint 30 ... Forward-reverse lever 38 ... Neutral position detection limit switch 40 ... Variable amplitude control means 41 ... Hydraulic pump 42 ... Electromagnetic Switching valve 43 ... Amplitude switching switch 44 ... Electromagnetic switching valve 45 ... L position sensor 46 ... H position sensor 47 ... Hydraulic pump 70 ... Forward / backward operation device

Claims (3)

[Claims] 1. An oscillating shaft composed of supporting members arranged so as to be spaced apart and opposed to each other, and a movable eccentric weight pivotally mounted between the supporting members in a direction orthogonal to the axis of the oscillating shaft. An eccentric weight driving means for rotating the movable eccentric weight about a pivot to displace the center of gravity of the vibration generating shaft with respect to the axis of the vibration generating shaft. 2. The eccentric weight driving means comprises an actuator,
The driving shaft from the actuator, the joint rotatably mounted around the driving shaft, one end connected to the joint side and the other end connected to the movable eccentric weight side, the displacement of the linear motion from the joint is the rotational motion around the pivot. The vibrating mechanism according to claim 1, wherein the vibrating mechanism includes a connecting rod that changes the displacement of the connecting rod. 3. A vibrating roller comprising the vibrating mechanism according to claim 1.