JPH10317313A - Roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent rolling wheels from being dragged when a roller is turning, using a simple drive mechanism which employs a differential unit. SOLUTION: A frame 12 is provided in the center of a vehicle body along its cross direction, and bearing cylinders 14 are projected from the right and left sides thereof. Two right and left axles 13 are supported against the bearing cylinders 14, and a hub 27 is removably assembled to the end of each axle 13. The disc wheels 30 of the pair of rolling wheels 6 are mounted on the hubs 27 along opposite directions. A differential unit 15 is stored inside the frame 12 and its gear case 18 is rotated by a hydraulic motor via a chain 9 to rotate the right and left axles 13 in differential fashion via a drive bevel gear 23 and a driven bevel gear 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling roller such as a vibration roller or a tire roller for rolling a road surface with a plurality of rolling wheels provided in a vehicle width direction.

[0002]

2. Description of the Related Art Conventionally, the following technology has been known as this type of roller. One hydraulic motor is installed at the center in the width direction of the vehicle body,
A technology in which the output shaft of this hydraulic motor projects from the motor housing to both left and right sides, and two rolling wheels are attached to each projection (Japanese Patent Application Laid-Open No. Hei 8-326010). Two left and right hydraulic motors are installed in opposite directions at the center in the width direction of the vehicle body, and two hydraulic motors are mounted on the output shaft of each hydraulic motor.
A technique in which two rolling wheels are attached (Japanese Utility Model Laid-Open No. 6-49505). A technology in which two hydraulic motors are installed at intervals on the left and right sides of a vehicle body, the output shaft of each hydraulic motor protrudes from the motor housing to the left and right sides, and one rolling wheel is attached to each protruding portion (Japanese Patent Laid-Open No. No. 8-246412).

[0003]

However, according to the rolling roller of the present invention, since four rolling wheels are mounted on one output shaft, the rolling wheels drag on the road surface when the vehicle turns, and the rolling wheels are rolled. There was a problem that the finish of the pressed surface was deteriorated. On the other hand, in the case of the pressure roller, the right and left pressure wheels can be rotated differentially during turning to prevent dragging, but for that purpose, two hydraulic motors are required, and the driving mechanism is complicated. In addition, there was a problem that it became expensive.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pressure roller capable of preventing a rolling wheel from being dragged during turning by a simple driving mechanism using a differential device.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a rolling roller having a plurality of rolling wheels in the width direction of a vehicle body. , A compaction wheel is attached to each axle, and a differential device for differentially transmitting the power of the driving device to each axle is provided at the center in the width direction of the vehicle body (claim 1).

Here, in order to compactly install the differential device in a limited space at the center in the width direction of the vehicle body, in the present invention, the differential device is rotated by a drive device around the same axis as the axle. A case, a drive bevel gear provided to be rotatable integrally with the gear case, and a pair of driven bevel gears meshing with the drive bevel gear,
Opposite ends of the two axles are rotatably inserted into the gear case and connected to the driven bevel gear (claim 2).

[0007] Further, the support mechanism of the rolling wheel is made robust,
In addition, in order to facilitate replacement of the rolling bearing wheels, in the present invention, a frame for housing the differential device is provided at the center in the width direction of the vehicle body, and bearing cylinders for supporting the axle are protrudingly provided on both left and right side surfaces of the frame. A hub is removably assembled to the tip of the axle exposed from the bearing cylinder, and the disc wheels of the pair of rolling wheels are attached to the hub in opposite directions.

In this case, it is preferable that the hub is provided with a concave portion into which the protruding end of the bearing cylinder is inserted so that the axle can be stably supported by the bearing cylinder as long as possible.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the whole of a combined vibration roller as a pressure roller. A vibrating wheel 3 composed of one steel drum and an engine 4 are provided on a front body 2 of the vibrating roller 1. On the rear body 5 of the vibration roller 1, a rolling wheel 6 made of four rubber tires, one hydraulic motor 7 and a driver's seat 8 are provided. The rolling wheels 6 are arranged side by side in the width direction of the rear body 5, and are driven via a chain 9 by a hydraulic motor 7 as a driving device. The engine 4 is provided with a hydraulic pump 10 for supplying hydraulic oil to the hydraulic motor 7.

FIGS. 3 and 4 show the drive mechanism of the rolling wheel 6 in detail. A thin box-shaped frame 12 is fixed to the center of the rear body 5 in the width direction. Outside the frame 12, two left and right axles 13 are rotatably supported by bearing sleeves 14. A differential device 15 for differentially transmitting the power of the hydraulic motor 7 to the two axles 13 is housed inside the frame 12.

The bearing sleeves 14 are provided on both right and left sides of the frame 12 and are horizontally held by a plurality of reinforcing plates 17. The differential device 15 includes a gear case 18, and the case 18 is provided with a bearing 19 through a bearing 19.
Is rotatably supported at the base end. The axle 13 is formed to be longer than the bearing tube 14, and an intermediate portion thereof is supported by a distal end of the bearing tube 14 via a bearing 20, and a base end portion is inserted into a center hole 18 a of the gear case 18 so as to be relatively rotatable. .

A sprocket wheel 22 meshing with the chain 9 is fixed to the outer periphery of the gear case 18, and the gear case 18 is rotated around the same axis as the axle 13 by the hydraulic motor 7. Inside the gear case 18, a pair of drive bevel gears 23 is provided so as to be able to revolve integrally with the gear case 18 by a shaft 24 orthogonal to the axle 13 and to be able to rotate around the shaft 24. A pair of driven bevel gears 25 meshing with the drive bevel gear 23 is provided inside the gear case 18. Opposite base ends of the left and right axles 13 are spline-coupled to these gears 25.

On the other hand, a hub 27 is spline-coupled to the tip end of the axle 13 exposed from the bearing cylinder 14, and a holding plate 28
And is removably assembled with a bolt 29 via the A pair of inner and outer flange portions 27a are provided on the outer periphery of the hub 27.
And a concave portion 27 b into which the protruding end of the bearing tube 14 enters is formed on the inner end surface of the hub 27.
The disc wheels 30 of the two rolling wheels 6 are attached to the respective flange portions 27 a by bolts 31 in opposite directions, and the inner rolling wheels 6 are provided so as to surround the bearing cylinder 14.

In the combined vibration roller 1 having the above structure, two hydraulic axles 13 are driven by one hydraulic motor 7 via a chain 9 and a differential device 15. When the vehicle bodies 2 and 5 travel straight, the pair of drive bevel gears 23 of the differential device 15 revolve without rotating, so that the two driven gears 25 are rotated at the same rotational speed, and the left and right axles 13 are driven at a constant speed. Rotated. Also, when the vehicle bodies 2 and 5 are turning, since each drive bevel gear 23 revolves while rotating, each driven bevel gear 25 is rotated at a different rotation speed, and the left and right axles 13 are differentially rotated at different speeds. You.

Therefore, a simple and inexpensive driving mechanism that only connects the differential device 15 to one hydraulic motor 7 can prevent the road surface drag phenomenon at the time of turning and make the rolling surface beautiful. Further, according to the differential device 15, the driven bevel gear 25 is meshed with the driven bevel gear 25 inside the gear case 18 and the axle 13 is connected to the driven gear 25, so that the differential device 15 is made thin. With this configuration, it can be compactly installed in a limited space at the center in the width direction of the rear vehicle body 5, and can be easily applied to a small compaction roller.

On the other hand, in the axle mechanism of the rolling wheel 6, the axle 13 is supported by the bushing 14, and the pair of disc wheels 30 are mounted on the tip of the axle 13 via the hub 27 in opposite directions. The load application points of the two rolling wheels 6 are moved toward the center in the vehicle width direction, and the cantilever type axle 1
3 can be made as short as possible, and the support mechanism for the rolling wheel 6 can be made robust. In addition, the hub 27 has the bearing cylinder 1
Since the recess 27b into which the protruding end portion 4 is inserted is provided, the axle 13 can be stably supported by the relatively long bearing cylinder 14. Further, when replacing the rolling wheel 6, the hub 27 is easily removed from the side of the rear body 5 from the axle 13, and the hub 27 is provided with the inner and outer disk wheels 3
There is an advantage that 0 can be easily detached.

The present invention is not limited to the above embodiment, but may be carried out by appropriately changing the shape and configuration of each part without departing from the spirit of the present invention, as exemplified below. It is possible.

A gear mechanism is used instead of the chain as power transmission means from the hydraulic motor to the differential device. For example, in the differential device 15 shown in FIG.
3, the driven gear 33 is connected to a plurality of intermediate gears 34,
35 to the hydraulic motor.

[0019] The differential device is provided on various types of compaction rollers other than the combined vibration roller. For example, as shown in FIG. 6, in a tire roller 36 having a front wheel as the rolling wheel 6, the differential device 15 is installed at the center in the width direction of the front end of the vehicle body 37.

[0020]

As described above in detail, according to the first aspect of the present invention, the differential device is provided at the center of the vehicle body in the width direction, and the power of the driving device is differentially transmitted to the two left and right axles. With such a configuration, there is an excellent effect that the drag of the rolling wheel can be prevented by a simple and inexpensive driving mechanism.

According to the second aspect of the present invention, the driven bevel gear meshes with the driven bevel gear inside the gear case and the opposed ends of the two axles are connected to the driven bevel gear. And it can be installed compactly in a limited space at the center in the width direction of the vehicle body.

According to the third aspect of the present invention, the axle is supported by the bearing cylinder protruding from the frame, the hub is detachably assembled to the tip of the axle, and the pair of disc wheels are attached to the hub in opposite directions. In addition, the cantilever axle can be made as short as possible, and the support mechanism for the rolling wheel can be made robust, and the rolling wheel can be easily replaced.

According to the fourth aspect of the present invention, since the hub is provided with the concave portion into which the protruding end of the bushing enters, there is an effect that the bushing can be lengthened and the axle can be stably supported.

[Brief description of the drawings]

FIG. 1 is a side view of a combined vibration roller according to an embodiment of the present invention.

FIG. 2 is a rear view of the vibration roller of FIG. 1;

FIG. 3 is a cross-sectional view showing a driving and supporting mechanism of a pressure roller in the vibration roller of FIG. 1;

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a cross-sectional view showing another driving mechanism for a rolling wheel.

FIG. 6 is a side view of a tire roller showing another application example of the present invention.

[Description of reference numerals] 1 ··· Vibration roller, 2 ··· Front body, 3 ·· Vibration wheel, 4
-Engine, 5-Rear body, 6-Rolling wheel, 7-Hydraulic motor, 9-Chain, 12-Frame, 13-
Axle, 14..bearing, 15..differential device, 18..gear case, 22..sprocket wheel, 23..drive bevel gear, 25..driven bevel gear, 27 ..
Hub, 27b recess, 30 disk wheel
36 ... tire rollers, 37 ... body.

Claims (4)

[Claims] 1. A compaction roller having a plurality of compaction wheels in the width direction of a vehicle body, two left and right axles are rotatably supported on the vehicle body, and compaction wheels are mounted on each axle, and A rolling roller provided with a differential device for transmitting the power of the driving device to each axle differentially at the center. 2. A differential device comprising: a gear case rotated by a drive device around the same axis as an axle; a drive bevel gear rotatably provided on the gear case; and a pair of driven bevel gears meshing with the drive bevel gear. The roller according to claim 1, further comprising a gear, and opposing ends of the two axles inserted into the gear case so as to be relatively rotatable and connected to the driven bevel gear. 3. A frame for accommodating a differential device is provided at the center in the width direction of the vehicle body, and bearing cylinders for supporting the axle are provided on both right and left side surfaces of the frame, and a hub is provided at the tip of the axle exposed from the bearing cylinder. The roller according to claim 1 or 2, wherein the roller is detachably assembled and the disc wheels of the pair of roller wheels are attached to the hub in opposite directions. 4. The roller according to claim 3, wherein the hub has a concave portion into which the protruding end of the bearing cylinder enters.