JP4524726B2 - Tire roller rolling tire support drive structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tire roller, and more particularly to a support / drive structure for a compaction tire in which a plurality of compaction tires are arranged in the vehicle width direction and the compaction tire is driven.
[0002]
[Prior art]
As the support and drive structure of the tire roller compaction tire, (1) a double-shaft type hydraulic motor is provided at the center in the width direction of the vehicle body. A combination of two rolling tires (Japanese Patent Laid-Open No. 8-322010), (2) A support plate is suspended at the center in the width direction of the vehicle body, and a horizontal connecting shaft is integrally provided at the lower end thereof. On the connecting shaft, the left and right wheels provided on the positions on both sides of the support plate are rotatably supported by the compaction tire via bearings, and are located outside the width of the compaction tire on both sides in the vehicle width direction. A hydraulic motor is attached to a hydraulic motor mounting portion at the lower end of the frame, and the respective hydraulic motors are coupled to opposing rolling tires so that the rolling tires are supported at three locations in the vehicle width direction (Japanese Patent Laid-Open No. Hei 11- 61726) is known.
[0003]
[Problems to be solved by the invention]
In the above (1), the motor shaft of the hydraulic motor also serves as the axle. Therefore, in this type of hydraulic motor, it is necessary for the hydraulic motor itself to have a shaft support structure that supports the axial load due to the vehicle weight or the like, and the hydraulic motor itself becomes large, resulting in high costs. Further, since the hydraulic piping is also performed at the center of the vehicle body, it is difficult to handle the piping. In (2), since the hydraulic motor is outside the vehicle width, the hydraulic piping is easy. However, since the compaction tire is supported by rotation by each hydraulic motor, the hydraulic motor still supports the axial load. Therefore, a highly rigid bearing structure must be adopted. Also, the wheel frame to which the hydraulic motor is attached needs to have high rigidity in order to support the axial load. Therefore, the wheel frame has a larger width in the front-rear direction of the vehicle than the hydraulic motor mounting portion, and can only bend to the inside of the compaction tire at a relatively low height position from the road surface. The curve clearance is small, and there is a problem that affects the rolling operation.
The present invention is intended to provide a support / drive structure for a compaction tire in which a hydraulic motor that drives the compaction tire does not have to support the axial load of the vehicle. Another object of the present application is to provide a structure for supporting and driving the above-described compaction tire that can increase the curve clearance even when the hydraulic motor support member is provided outside the compaction tire.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the compressed tire support driving structure of the present tire roller, a plurality of compressed tires are arranged side by side in the vehicle width direction, and these compressed tires are driven by a rotation output body of a hydraulic motor. In a certain tire roller, a tire support member is provided in the middle portion of the vehicle width of the vehicle body so as to enter between adjacent rolling tires, and the center portion in the vehicle width direction of the axle is rotated via a bearing on the tire support member. A rolling tire is integrally connected to the projecting portions on both sides of the tire support member of the axle so that the axle load is supported by the bearing, while the vehicle body has one end in the vehicle width direction. A drive motor support member is provided corresponding to the rolling tire on the side, and a hydraulic motor is attached to the drive motor support member at the lower end of the arm portion extending downward, coaxially with the axle, and the hydraulic motor rotates. Out The body, connected to the opposing compaction tire, a hydraulic motor where the motor mounting portion is bent in such a manner as to enter the inside position of the rolling pressure tire width direction outermost facing the motor mounting section, attached to the motor mounting part The outer end in the vehicle width direction is positioned on the inner side in the vehicle width direction from the side surface of the compacted tire, and the arm portion is set narrower than the motor mounting portion .
[0005]
According to this, the axial load that the axle must bear due to the weight of the vehicle (or in addition to this, the force caused by the vibration generated by the vibration generator) is supported exclusively by the bearing of the tire support member. Therefore, the hydraulic motor does not have to bear the axial load acting on the axle as described above, and therefore there is no need to use a hydraulic motor having a structure that also supports the axial load as in the prior art. Therefore, it is possible to adopt a general-purpose hydraulic motor configured to generate only the drive torque for the purpose. In addition, since the hydraulic motor does not have to receive the axial load, the rigidity of the drive motor support member can be reduced, and the width in the vehicle front-rear direction can be set narrow, so that it faces the inside of the compaction tire at a high position from the road surface. The drive motor support member can be bent, and as a result, the curve clearance can be increased.
[0006]
Specifically, the axle is configured by integrally including hubs at both ends in the vehicle width direction, and the hub is coupled to a disc wheel of a compaction tire. The hub is coupled to each of the pair of rolling tires, and a motor housing space into which the tip of the hydraulic motor enters is formed in the outer portion in the vehicle width direction .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 1, a rear side view of the tire roller 1 is shown. A tire support member 3 is suspended from the rear portion of the vehicle body 2 at the center in the vehicle width direction. The tire supporting member 3 is provided so as to enter between the pair of rolling tires 17 on the left and right in the vehicle width direction, which will be described later. The tire support member 3 is formed in a box shape by welding plate members, and is provided on the front wheel side with an axial load acting on the axle 4 (half the weight of the vehicle body (half is carried on the front wheel side of the tire roller)) In the case where vibration is generated by the vibration generator, the load generated by the vibration is sufficient to carry the load via the axle 4. A bearing 6 is fixed to the tire support member 3 coaxially on the outer sides in the vehicle width direction of the left and right side plates 5. A center portion of the axle 4 in the vehicle width direction (shaft longitudinal direction) is rotatably supported by the bearing 6. The bearing 6 is sufficient to support the axial load.
[0008]
The axle 4 is composed of a shaft portion 7 and a hub 8 provided integrally on both longitudinal sides thereof. Both longitudinal ends of the shaft portion 7 are formed on the spline shaft 9, and a spline hole 10 formed in the hub center portion 11 is fitted to the spline shaft 9 so as to be freely inserted and removed from the axial direction, and the hub center portion 11 is attached to the collar 12. The bolt 13 is fixed integrally to the shaft portion. The hub 8 is formed in a cup shape, and a distal end portion in the radial direction is a disc wheel mounting portion 14. A disc wheel 15 of a pair of compacted tires 17 is coupled to the disc wheel mounting portion 14 on both sides of the tire support member 3 by bolts 16. Thus, a plurality of (four) ) Rolled tires 17 are juxtaposed.
[0009]
The base portion of the drive motor support member 20 is integrally fixed together with the piping member 21 on the vehicle body 2 at a position above the side surface of the rolling tire 17 on one end side in the width direction (right end side in the figure). It extends downward. The lower end of the arm portion 22 is a hydraulic motor mounting portion 23. Since the shaft load is exclusively supported by the bearing 6, the motor support member 20 to which the hydraulic motor 30 is attached need not receive the axial load via the hydraulic motor 30, and therefore receives the torque reaction force of the hydraulic motor 30. Therefore, it is sufficient that the necessary and minimum rigidity is provided. For this reason, the width of the arm portion 22 is set narrower than the motor mounting portion 23. Since the width of the arm portion 22 is narrowed, the arm portion 22 can be positioned at a higher position P1 from the road surface where the arm portion 22 starts to bend toward the inside of the compaction tire 17 from a state parallel to the side surface 17a of the compaction tire 17. As a result, the height (curve clearance) H from the road surface R to the position P2 where the motor support member 20 intersects the side surface 17a of the compaction tire 17 in FIG. 2 is compared with the wheel frame of the prior art (2). It is high. In this embodiment, the curve clearance H is set so as to be the same as that of the front wheel 50 (vibrating compaction wheel made of an iron wheel) of the tire roller 1 shown in FIG. Further, since the arm portion 22 of the drive motor support member 20 is mounted so as to be inside the vehicle body side surface 2a, the curve clearance H is maintained and the side surface 17a of the rolling tire 17 is the most on the vehicle body side surface. The side overhang to the surface 2a which is the outer side in the width direction is substantially the same as the side overhang to the side end surface 50a of the front wheel 50 and the surface 2a. In FIG. 3, 51 and 52 are wheel frames for supporting the front wheels.
[0010]
The arm portion 22 is further bent to the inside of the disc wheel 15 at a slightly lower height from the upper edge of the disc wheel 15, and a tip portion thereof is formed in a vertical hydraulic motor mounting portion 23. The hydraulic motor mounting portion 23 is located slightly outside the center line in the vehicle width direction of the disc wheel 15 of the rightmost rolling tire 17 and is located inside the disc wheel 15. A surface 23a is formed. In the hydraulic motor mounting portion 23, the upper half of the hydraulic motor 30 is just fitted into the semicircular arc mounting surface 23 and is mounted coaxially with the axle 4 by bolts 31, and the rotational output body 32 of the hydraulic motor 30 has a drive The plate 33 is integrally connected and connected to the disc wheel 15 of the opposed rightmost rolling tire 17 by bolts 16. Here, the drive plate 33 and the disc wheel mounting portion 14 of the hub 8 are coupled by common bolts 16 at three locations. In the mounted state, the outer end in the vehicle width direction of the hydraulic motor 30 is located on the inner side in the vehicle width direction from the outermost end surface 17 a of the rolling tire 17. Therefore, the side overhang is not restricted by the hydraulic motor 30. Further, a rotation mechanism 35 of the hydraulic motor 30 protrudes on the inner side in the vehicle width direction of the rotation output body 32 of the hydraulic motor 30, and the rotation mechanism 35 is located in the inner accommodation space 36 of the cup-shaped hub 8. positioned.
[0011]
In such a structure, since the axial load is exclusively carried by the bearing 6, the hydraulic motor 30 does not require a highly rigid bearing structure for supporting the axial load. Therefore, the hydraulic motor 30 here has a structure only for generating a driving torque for traveling on the wheels. Therefore, an inexpensive general-purpose hydraulic motor 30 can be used, which contributes to cost reduction. Yes.
The pressure piping 40 to the hydraulic motor 30 is performed via the piping member 21 and is connected to the hydraulic motor 30 from the inside of the motor support member 20 through the notch hole 41 provided in the motor support member 20. The pipe 40 is also arranged inside the space region defined by the side overhang and the curve clearance H. As described above, since the pressure piping is performed on the side surface side of the vehicle body 2, the piping is easy to handle as compared with the piping provided in the central portion of the vehicle width.
[0012]
【The invention's effect】
As described above, in the present invention, since the axial load that the axle must bear is exclusively supported by the bearing of the tire support member, the hydraulic motor does not bear the axial load acting on the axle as such. Therefore, it is not necessary to use a hydraulic motor having a structure that also supports an axial load as in the prior art, and a general-purpose hydraulic motor configured to generate only driving torque for traveling can be employed. . In addition, since the hydraulic motor does not have to receive the axial load, the rigidity of the drive motor support member can be reduced, and the width in the vehicle front-rear direction can be set narrow, so that it faces the inside of the compaction tire at a high position from the road surface. The drive motor support member can be bent, and as a result, the curve clearance can be increased.
In addition, since it is driven by one hydraulic motor, the cost can be further reduced, and since the hydraulic motor is arranged on the outer side in the width direction of the compacted tire, it is easy to handle the hydraulic piping. .
[Brief description of the drawings]
FIG. 1 is a side view of a rear wheel portion of a tire roller.
FIG. 2 is a cross-sectional view of the axle portion of FIG.
FIG. 3 is a front view of a front wheel portion of a tire roller.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tire roller 2 Car body 3 Tire support member 4 Axle 6 Bearing 8 Hub 15 Disc wheel 17 Compressed tire 17a Side surface 20 of a compressed tire Drive motor support member 23 Motor attachment part 32 Rotation output body 30 Hydraulic motor 36 Motor accommodation space

Claims (3)

In a tire roller in which a plurality of compaction tires are arranged side by side in the vehicle width direction, and these compaction tires are driven by a rotary output body of a hydraulic motor, the adjacent compaction is placed at the vehicle width center portion of the vehicle body. A tire support member is provided so as to enter between the tires, and the center portion in the vehicle width direction of the axle is rotatably supported via a bearing on the tire support member, and the protruding portions on both sides of the tire support member of the axle are provided on the tire support member. Each of the compaction tires is integrally connected to support the axial load by the bearing, while the vehicle body is provided with a drive motor support member corresponding to the compaction tire at one end in the vehicle width direction. In the motor support member, a hydraulic motor is attached to the motor attachment portion at the lower end of the arm portion extending downward, coaxially with the axle, and the rotation output body of the hydraulic motor is connected to the opposing rolling tire, and the motor attachment portion is the motor. Mounting The outer end in the vehicle width direction of the hydraulic motor attached to the motor mounting portion is inward in the vehicle width direction from the side surface of the compressed tire. A rolling contact support structure for a tire roller, wherein the width of the arm portion is set narrower than the motor mounting portion .   2. The compaction tire support of a tire roller according to claim 1, wherein the axle is configured by integrally including hubs at both ends in the vehicle width direction, and the hub is coupled to a disc wheel of the compaction tire. Driving structure.   3. The tire roller rolling device according to claim 2, wherein each of the hubs is coupled to a pair of rolling tires, and a motor housing space into which a front end portion of the hydraulic motor enters is formed in an outer portion in the vehicle width direction. Pressure tire support drive structure.

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