JP2004346549A - Vibrating roll support structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibrating roll support structure for mounting a vibrating roll with easy assembly work without using a tapered roller bearing. <P>SOLUTION: In a vibrating roller provided with the vibrating roll 1 generating vibration by the rotation of a vibration exciting shaft 20, a swing bearing 12 is disposed between a first end plate 3 mounted inside the vibrating roll 1, and a support bracket 16 mounted to the vehicle body side, and the vibration exciting shaft 20 itself or a rotating mechanism part related to the vibration exciting shaft 20 is disposed in a hollow part of the swing bearing 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a vibrating roller used for, for example, rolling of a ground.
[0002]
[Prior art]
Vibration rollers are mainly used for compaction of embankments at construction sites such as highways and dams, and for compaction of asphalt pavement on roads. Has the effect of compacting the ground densely. As a vibration mechanism built in a vibration roll, a structure for rotating a vibration generating shaft to which an eccentric weight is attached is generally used.
[0003]
FIG. 4 is an explanatory plan sectional view showing the internal structure of a vibrating roll incorporating the vibrating mechanism. The vibrating roll 51 is rotatably supported by a machine frame 52 of a vibrating roller (not shown). The vibrating roll 51 has a hollow cylindrical shape, and a first end plate 53 and a second end plate 54 are fixed on the inner peripheral surface of the vibrating roll 51 so as to be spaced apart from each other. 55 are fixed. Axle shafts 56 and 57 are attached to the first end plate 53 and the second end plate 54, respectively. The axle shafts 56, 57 are pivotally supported by housings 59, 60 via a pair of tapered roller bearings 58, respectively, and the housings 59, 60 are respectively fixed to the machine frame 52 via vibration isolating rubber 61. It is fixed to 62 and 63. As described above, when the vibration roller travels, the axle shafts 56 and 57 are configured to be rotatable with respect to the housings 59 and 60, so that the vibration roll 51 travels and rotates.
[0004]
A vibration motor 65 is mounted on one housing 59 via a vibration motor mounting member 64, and a vibrating shaft 67 is connected to a rotating shaft thereof via a joint member 66 such as a spline sleeve. The exciter shaft 67 extends in the exciter case 55, and is pivotally supported at both ends by axle shafts 56 and 57 via bearings 68 and 69. The oscillating shaft 67 has an eccentric weight 70 (in the figure, a variable amplitude type vibration mechanism whose amplitude changes according to a difference in the rotation direction of the oscillating shaft 67 is shown, and includes a movable eccentric weight 70a and a fixed eccentric weight 70b. Is attached). As described above, when the vibration motor 65 operates, the vibrating shaft 67 rotates, and the centrifugal force of the eccentric weight 70 generates a vibration force on the vibration roll 51. The above structure is also disclosed in Patent Document 1, for example.
[0005]
[Patent Document 1]
JP-A-2003-019463 (page 3, FIG. 1)
[0006]
[Problems to be solved by the invention]
As a bearing that supports the vibrating roll 51, a bearing that is excellent in load resistance against thrust load, radial load, and moment load is required. Conventional ball bearings are inferior in resistance to moment load and thrust load. Therefore, as described above, the tapered roller bearing 58 is exclusively used to support the vibrating roll 51 as described above. However, when mounting the tapered roller bearing 58, as is well known, it is necessary to assemble the disassembled inner case side and outer case side using an adjustment shim or the like so that an appropriate preload is generated on the tapered roller. However, this preload adjusting operation requires skill and takes a long time, so that there has conventionally been a problem that the working efficiency of assembling the vibrating roll 51 tends to be reduced.
[0007]
The present invention has been made in order to solve the above-described problems, and it is an object of the present invention to provide a support structure for a vibrating roll that can be mounted with a simple assembling operation without using a tapered roller bearing. The purpose is.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a vibrating roller having a vibrating roll in which vibration is generated by rotation of a vibrating shaft, wherein a head plate mounted inside the vibrating roll and a support bracket mounted on a vehicle body side. A slewing bearing is disposed between the slewing bearings, the oscillating roll is supported on the vehicle body side via the slewing bearing, and the oscillating shaft itself or a rotation mechanism related to the oscillating shaft is arranged in a hollow portion of the slewing bearing. Configuration.
[0009]
Further, a vibration motor for rotating the vibrating shaft is disposed at a position shifted from the axis of the vibrating shaft, and the inside of the vibrating shaft is formed hollow, and A hydraulic pipe was connected to the end face via a rotary joint to supply pressure oil to the inside of the vibrating shaft.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is an explanatory plan view of a vibrating roll (hereinafter simply referred to as a roll) 1. The roll 1 is rotatably supported, for example, on a machine frame 2 of a vibration roller (not shown). The roll 1 has a hollow cylindrical shape, and has a disk-shaped first end plate 3 and a second end plate 4 having through holes 3a and 4a formed in the center on the inner peripheral surface thereof. I have. A hollow cylindrical exciter case 5 is fixed between the first end plate 3 and the second end plate 4 concentrically with the roll 1 so as to be sandwiched over the respective peripheral portions of the through hole 3a and the through hole 4a. Is established.
[0011]
According to the present invention, a slewing bearing 12 is disposed between a head plate (a first head plate 3 and a second head plate 4) and support brackets 16 and 17 attached to the vehicle body. The main feature is that it is configured to be supported on the side. In the example of FIG. 1, the housings 6 and 7 are attached to the first end plate 3 and the second end plate 4 so as to close the through holes 3a and 4a, and the slewing bearing 12 is attached to the housings 6 and 7. Is shown.
[0012]
More specifically, the housings 6 and 7 are made of members having annular flange portions 6a and 7a and cylindrical body portions 6b and 7b, respectively. In this position, the flanges 6a and 7a are fastened and fixed to the peripheral edges of the through holes 3a and 4a by bolts 8 respectively. One housing 6 is formed with a through hole 6c for connecting the vibration motor 18 side and the vibrating shaft 20 side as described later.
[0013]
In the present embodiment, each of the slewing bearings 12 is formed of a radial ball bearing, and includes an annular inner case 9, an outer case 11, and a ball 10. The slewing bearing 12 is a bearing having excellent load resistance performance against a radial load, a thrust load (axial load) and a moment load. Each inner case 9 is fastened and fixed to the body portions 6b and 7b of the housings 6 and 7 by bolts 13, and each outer case 11 is fastened and fixed to the support brackets 16 and 17 by bolts 14. The support brackets 16 and 17 are members attached to the machine frame 2 via a vibration-proof rubber 15. As described above, the roll 1 rotates while the inner case 9 rotates with respect to the outer case 11 fixed to the vehicle body. The inner case 9 may be attached to the support brackets 16 and 17, and the outer case 11 may be attached to the housings 6 and 7 (the first end plate 3 and the second end plate 4).
[0014]
A vibration motor 18 capable of normal and reverse rotation is attached to one of the support brackets 16, and a vibrating shaft 20 is connected to a rotating shaft thereof via a joint member 19 such as a spline sleeve. The drawing shows a case where the joint member 19 is located in the hollow portion of the slewing bearing 12 (that is, the space inside the inner case 9). The exciter shaft 20 extends horizontally so as to be concentric with the roll 1 in the exciter case 5, and is pivotally supported at both ends by the housings 6 and 7 via the bearings 21 and 22. The excitation shaft 20 is provided with a pair of eccentric weights 23 including a movable eccentric weight 23a and a pair of fixed eccentric weights 23b. The operation of the eccentric weight 23 is publicly known and will not be described in detail here. However, the position of the movable eccentric weight 23a with respect to the fixed eccentric weight 23b differs between the forward rotation and the reverse rotation of the vibration motor 18, The eccentric mass of the entire eccentric weight 23 has a different value, so that the roll 1 vibrates at a high amplitude or a low amplitude.
[0015]
As described above, the slewing bearing 12 is disposed between the end plates (the first end plate 3 and the second end plate 4) mounted inside the roll 1 and the support brackets 16 and 17 mounted on the vehicle body side. The roll 1 is supported on the vehicle body side via the shaft 12, and the vibrating shaft 20 itself or a rotating mechanism unit related to the vibrating shaft 20 (refers to the joint member 19 as described above in FIG. ), The following effects can be obtained. Conventionally, a tapered roller bearing is used to rotatably support the vibrating roll, and as described above, the mounting work (adjustment of preload and the like) of the tapered roller bearing is complicated.
[0016]
On the other hand, when the slewing bearing 12 is used, the inner case 9 and the outer case 11 are moved to the end plates (the first end plate 3 and the second end plate 4) without any time-consuming operation such as preload adjustment. Alternatively, the roll 1 can be easily attached only by fastening and fixing the support brackets 16 and 17 with bolts. As described above, the slewing bearing 12 is a bearing excellent in load-bearing performance with respect to a radial load, a thrust load, and a moment load, and is also excellent in rotation support performance of the roll 1. In particular, when supporting the roll 1, a large radial load is applied, but by using the slewing bearing 12, it can be easily dealt with.
[0017]
By disposing the vibration generating shaft 20 itself or a rotating mechanism for the vibration generating shaft 20 in the hollow portion of the slewing bearing 12, a simple structure for the vibration mechanism can be realized. Further, since the height of the slewing bearing 12 (indicating the dimension in the left-right direction in FIG. 1) is low, the space occupied by the roll 1 in the left-right direction is reduced. The effect of increasing the degree of freedom is also achieved.
[0018]
Next, a first modified example of the present invention is shown in FIG. FIG. 2 is an explanatory plan sectional view of the roll 1 and shows only the side on which the vibration motor 18 is provided. In this drawing, the same members as those described in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In the case of FIG. 1, the slewing bearing 12 is attached to the first end plate 3 via the housing 6, whereas in the first modification, the slewing bearing 12 is directly attached to the first end plate 3. An example is shown.
[0019]
The inner case 9 is fastened and fixed to a peripheral portion of the through hole 3 a of the first end plate 3 by a bolt 32. The outer case 11 is fastened and fixed to an annular mounting seat 33 mounted on the support bracket 16 by a bolt 34. Also in the case of this example, the inner case 9 may be mounted on the mounting seat 33 side (the support bracket 16 side), and the outer case 11 may be mounted on the first end plate 3. The mounting seat 33 functions as a spacer in the left-right direction of the roll 1. In some cases, the inner case 9 or the outer case 11 may be directly mounted on the support bracket 16 without passing through the mounting seat 33.
[0020]
Reference numeral 31 denotes a housing attached to the vibration exciter case 5 so as to close the through hole 3a of the first end plate 3. One end of the vibration excitation shaft 20 is pivotally supported by the housing 31 via the bearing 21. In addition, a joint member 19 that connects the vibrating shaft 20 and the rotating shaft of the vibration motor 18 is inserted through the hollow portion of the swing bearing 12. Also in the case of this example, the same effect as that shown in FIG. 1 is exerted, a simple structure is realized with respect to the vibration mechanism, and the slewing bearing 12 has a low height, so that the space occupied by the roll 1 in the left-right direction is reduced. As a result, the degree of freedom in designing other components and the like in the roll 1 increases.
[0021]
Next, a second modification of the present invention is shown in FIG. FIG. 3 is an explanatory plan view of the roll 1, showing only the side on which the vibration motor 18 is provided. In this figure, the same members as those described in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted. This example shows a case where the vibration motor 18 is disposed at a position shifted from the axis of the vibration excitation shaft 20 ′. The mounting of the slewing bearing 12 is the same as that of the first modification. The inner case 9 is fastened and fixed to the periphery of the through hole 3a of the first end plate 3 by bolts 32, and the outer case 11 is connected to the support bracket 16 Are fastened and fixed to the annular mounting seat 41 attached to the base by bolts 42.
[0022]
The vibrating shaft 20 ′ is pivotally supported by the housing 31 via a bearing 21, and one end of the vibrating shaft 20 ′ is further extended from the pivotal support portion and penetrates through the hollow portion of the slewing bearing 12. It is pivotally supported by the support bracket 16 via a seal 43. A driven gear 44 is fixedly provided at a portion of the vibration generating shaft 20 ′ between the first end plate 3 and the support bracket 16. On the other hand, the vibration motor 18 is attached to the support bracket 16 via the housing 45 at a position shifted from the axis of the vibration excitation shaft 20 ′. The rotating shaft 18a of the vibration motor 18 is pivotally supported by the housing 45 via bearings 46a and 46b. A driving gear 47 is fixedly provided at the end of the rotating shaft 18a, and the driving gear 47 meshes with the driven gear 44. Thus, when the vibration motor 18 operates, the vibration generating shaft 20 ′ rotates via the driving gear 47 and the driven gear 44.
[0023]
Then, a rotary joint 48 having a hollow cylindrical shape that is rotatable relative to the excitation shaft 20 ′ is attached to the end surface of the excitation shaft 20 ′. The vibrating shaft 20 'is configured as a hollow shaft, and has a passage 50 (shown by a dotted line) formed therein. With such a configuration, for example, pressure oil can be sent to the passage 50 of the vibrating shaft 20 ′ through the inside of the hydraulic pipe 49 and the rotary joint 48, and the movable eccentric weight 23 a Can be controlled (the phase control mechanism of the movable eccentric weight 23a is not shown). Since the diameter of the slewing bearing 12 is larger than that of the tapered roller bearing, the space around the hollow portion of the slewing bearing 12 can be widened, and the mounting position of the vibration motor 18 can be raised as described above. It can be shifted from the axis of the swing shaft 20 '.
[0024]
The preferred embodiments of the present invention have been described above. The present invention is not limited to the embodiment described above, and the design, the shape, the layout, the number, and the like of each component can be appropriately changed without departing from the gist thereof.
[0025]
【The invention's effect】
According to the present invention, the following effects can be obtained.
(1) A slewing bearing is provided between a head plate mounted inside the vibrating roll and a support bracket mounted on the vehicle body side, and the vibrating roll is supported on the vehicle body side via the slewing bearing. The vibration roll itself can be attached to the vehicle body without any time-consuming work such as preload adjustment if the vibration mechanism itself or the rotation mechanism for the vibration shaft is provided. It becomes. Further, a simple structure is realized with respect to the vibration mechanism.
(2) A vibration motor for rotating the vibrating shaft is disposed at a position shifted from the axis of the vibrating shaft, and the inside of the vibrating shaft is formed hollow, and the end surface of the vibrating shaft is rotary. If the hydraulic pipe is connected via a joint and the pressure oil is supplied to the inside of the vibrating shaft, for example, the phase of the movable eccentric weight can be controlled in the vibrator case using this pressure oil. Becomes possible.
[Brief description of the drawings]
FIG. 1 is an explanatory plan view of a vibrating roll according to the present invention.
FIG. 2 is an explanatory plan view of a vibrating roll showing a first modified example of the present invention.
FIG. 3 is an explanatory plan sectional view of a vibrating roll showing a second modified example of the present invention.
FIG. 4 is an explanatory plan view of a conventional vibrating roll.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vibration roll 3 1st end plate 4 2nd end plate 12 Slewing bearing 18 Vibration motor 20, 20 'Oscillating shaft 23 Eccentric weight 48 Rotary joint

Claims (2)

In a vibrating roller having a vibrating roll in which vibration is generated by rotation of a vibrating shaft,
A slewing bearing is provided between the end plate attached to the inside of the vibrating roll and a support bracket attached to the vehicle body, and the vibrating roll is supported on the vehicle body via the slewing bearing,
A vibrating roll support structure, wherein the vibrating shaft itself or a rotation mechanism unit related to the vibrating shaft is disposed in a hollow portion of the swing bearing. A vibration motor for rotating the vibrating shaft is disposed at a position shifted from the axis of the vibrating shaft,
And the inside of the vibrating shaft is formed to be hollow, and a hydraulic pipe is connected to an end surface of the vibrating shaft via a rotary joint to supply pressure oil to the inside of the vibrating shaft. The support structure for a vibrating roll according to claim 1, wherein:

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