JPH0226966Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a traveling drive device for a vibrating roller used for paving roads and the like.

(Prior art) Vibrating rollers are designed to perform paving work using a drum that is rotated by a hydraulic motor while being driven, but it is difficult to pave areas near road curbs or buildings. The support bracket that supports the car body and the drum, the hydraulic motor, etc. are accommodated within the open end of the drum, and the dimensions of the part of the support bracket that is connected to the car body and extends outside the drum end face are minimized to minimize vibrations. Since the load clearance of the rollers must be kept as small as possible, various difficulties arise in designing to ensure the structural strength of the ends of the drum and of the support bracket.

Conventionally, the vibrating roller running drive device implemented by the applicant of the present invention has a drive system in which each support bracket 5 is inserted into the end of the drum 50 from the left and right sides of the vehicle body, as shown in FIG.
1a and 51b are extended to form the rib 50 of the drum 50.
a, 50b, located outward in the drum axial direction,
The support shaft 52 is attached to the bearing 5 on one of the support brackets 51a.
3, and the support shaft 52 is connected to the gear 54 by spline fitting, and the rubber support plate 55 fixed to the inner end of the support shaft 52 is connected to the vibration isolating rubber 5.
A pinion 58 of the output shaft of a hydraulic motor 57 fixed to the rib 50a of the drum 50 via a support bracket 51a is engaged with the gear 54, and the gear 54 is rotationally driven by the hydraulic motor 57. The vibrating roller is driven by rotation.

In addition, the reference numeral 59 is an eccentric weight for generating vibration, and the reference numeral 60 is an eccentric weight for generating vibration.
is a hydraulic motor that rotationally drives this eccentric weight 59.

In order to simplify the structure of the traveling drive device, as shown in FIG. It is also conceivable to pivotally support the gear 63 and fix the rubber support plate 55 fixed to the gear 63 to the rib 50a via a vibration isolating rubber 56.

(Problems to be Solved by the Invention) As shown in FIG.
Therefore, the axial length of the traveling drive device increases by the axial length A of this bearing 53, and the length L from the rib 50a to the drum end surface increases, and the length of the drum end increases. It is structurally disadvantageous.

In addition, since the point of application of the load acting on the support bracket 51a from the drum 50 is approximately at the position of the gear 54, the support bracket 51 is applied from this point of application.
The moment arm up to the connecting plate 64 of a becomes long, and the value of the bending moment acting on the connecting plate 64 becomes very large.

When the bearing 62 is incorporated into the gear 63 as shown in FIG.
3 must be supported by two pairs of bearings 62 spaced apart from each other to prevent it from tilting, so not only does the axial length of the traveling drive device hardly become smaller, but the position of the load application point moves inward. moment・
As the arm becomes longer, the bending moment acting on the connecting plate 64 of the support bracket 51a becomes larger.

Furthermore, in the structure shown in FIG. 4, when assembling the gear 54 and the support shaft 52, the support shaft 52 is first fixed to the rubber support plate 55, the bottom cover 65 of the support bracket 51a is removed, and the gear 54 is attached to the support bracket. 5
It is necessary to assemble the gear 54 to the support shaft 52 and the support shaft 52 to the support bracket 51A by moving the support bracket 51a from the outside into the end of the drum while the support bracket 51a is inserted into the drum. It becomes very troublesome.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vibrating roller running drive device that has a simplified gear support structure, is easy to assemble, and has excellent structural strength of the drum end and support bracket.

(Means for Solving the Problems) A vibrating roller traveling drive device according to the present invention has supporting brackets connected from the left and right sides of the vibrating roller body to the end of the drum so that the drum is moved from the ribs of the drum to the end of the drum. The gear is located outward in the axial direction, and the gear is arranged concentrically with the drum between one support bracket and the rib.
In a vibrating roller traveling drive device in which a hydraulic motor attached to one of the support brackets rotates a gear fixed to the drum via a vibration-proof rubber, the gear is moved outward in the axial direction of the drum from the gear body of the gear. A support shaft portion is provided protruding from the support bracket, and the support shaft portion is pivotally supported by the pivot portion of the support bracket via two sets of bearings, so that the gear is supported by the support bracket in a cantilevered manner.

(Function) As described above, in the present invention, the support shaft of the gear is provided to protrude outward in the direction of the drum axis from the gear main body, and this support shaft is cantilevered by two sets of bearings on the pivot part of the support bracket. Since the drum is supported at the end of the drum, the pivot portion and the spindle portion are disposed in a dead space near the hydraulic motor attached to the support bracket within the end of the drum.

Furthermore, when assembling the traveling drive device to the drum, the pivot part can be easily assembled to the support shaft by moving the support bracket from the outside into the end of the drum while the gear is fixed to the drum. .

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

The first vibrating roller R is used for paving roads, etc.
As shown in the figures and FIG. 2, the vehicle body 1 is equipped with a steel drum 2 as a front wheel mounted on the front part of the vehicle body 1, and four tire wheels 3 as rear wheels mounted on the rear part of the vehicle body 1. 2 is rotated by a hydraulic motor 4 to make it travel.

Hereinafter, the traveling drive device for the vibrating roller R will be explained in detail with reference to FIG. 2.

The drum 2 has a cylindrical drum body 2a made of steel.
A pair of left and right disc-shaped ribs 2 welded to the inner circumferential surface of a drum body 2a spaced apart from each other on the left and right.
b, 2c.

Support brackets 5a and 5b are inserted from both left and right sides of the front part of the vehicle body 1 into the corresponding ends of the drum 2, respectively.
are arranged in series, and this pair of left and right support brackets 5
A drum 2 is rotatably mounted to a and 5b.

That is, the left support bracket 5a is located further outward in the drum axial direction than the left rib 2b, and a gear 6 is disposed concentrically with the drum 2 between the support bracket 5a and the rib 2b. Main body part 6
a is fixed to the rib 2b via the rubber support plate 7a and the vibration isolating rubber 8, and the support shaft portion 6b protruding outward in the drum axial direction from the gear main body portion 6a is a cylindrical pivot portion 9 of the support bracket 5a. The support shaft portion 6b is supported by the pivot portion 9 via two sets of bearings 10 which are inserted into the shaft and installed at a predetermined distance apart in the axial direction, whereby the gear 6 is supported in a cantilevered manner by the support bracket 5a. be done.

Two sets of hydraulic motors 4 are mounted on the outer surface of the support bracket 5a so that their shafts are parallel to the drum 2, and the output shaft of each hydraulic motor 4 is attached to the support bracket 5a.
The pinion 4a extends inwardly through the main plate 11 of the gear body 6a in an oil-tight manner, and the pinion 4a at the tip thereof meshes with teeth on the outer periphery of the gear main body portion 6a.

In order to prevent the hydraulic motor 4 from protruding out of the left end surface 12a of the drum 2, the main plate 11 on which the hydraulic motor 4 is mounted is located a predetermined distance inward from the left end surface 12a of the drum 2, and the pivot portion 9 is drum 2
It is welded to the main plate 11 so as to protrude outside the outer surface of the main plate 11 within the end portion of the support bracket 5a, and is fixed to the main plate 11 and the arm member 14 of the support bracket 5a by the reinforcing member 13 of the support bracket 5a.

As described above, since the gear 6 is pivotally supported on the support bracket 5a by effectively utilizing the space required for mounting the hydraulic motor 4, there is no space between the main plate 11 of the support bracket 5a and the rubber support plate 7a. Since it is sufficient to provide a narrow space in which the portion 6a can be disposed, the axial dimension of the traveling drive device becomes extremely small.

As a result, the rib 2
Since the distance to b can also be shortened, the structural strength of the left end portion of the drum 2 is improved.

Moreover, the distance B (moment
Since the arm) becomes extremely small, the vibrating roller R
The value of the bending moment acting on the connecting plate 15 due to its own weight and vibration load acting on the drum 2 becomes extremely small, which is advantageous in terms of the structural strength of the support bracket 5a.

Furthermore, when assembling the travel drive device, the support bracket 5a is moved from the outside into the end of the drum 2 with the gear 6 fixed to the rubber support plate 7a, so that the pivot portion 9 is attached to the support shaft portion 6b. can be fitted externally, making assembly extremely easy.

However, the support bracket 5a has a plurality of bolts 16.
It is designed to be fixed to the vehicle body 1.

Incidentally, the reference numeral 17 indicates the main plate 11 of the support bracket 5a.
Reference numeral 18 is a seal support member welded to the rubber support plate 7a, reference numeral 19 is an oil seal for sealing the rotating sliding portion, and reference numeral 20 is an oil reservoir.

To briefly explain the pivot structure of the right end of the drum 2, reference numeral 21 is a boss fixed to the rib 2c, and reference numeral 22 is a boss fixed to the right support bracket 5b via the vibration isolating rubber 8 and the rubber support plate 7b. This is a cylindrical pivot member, and the boss 21 inserted into the pivot member 22 is pivotally supported by the pivot member 22 via two sets of bearings 23 .

Reference numeral 24 is an eccentric weight for generating vibrations, and reference numeral 25 is a hydraulic motor for rotationally driving the eccentric weight 24.

Further, the reason why the recess 6c is provided on the inner end side of the gear main body portion 6a is to reduce the weight of the gear 6 and to avoid interference with the pivot structure of the shaft end of the eccentric weight 24.

In the above configuration, the drum 2 is pivotally connected to the vehicle body 1 via a pair of left and right support brackets 5a and 5b, and the drum 2 is rotated by rotating the gear 6 in the forward or reverse direction with the hydraulic motor 4. The vibrating roller R can be moved forward or backward.

Here, as shown in FIG. 3, the outer peripheral portion of the gear body portion 6a of the gear 6 that constitutes the teeth is formed into a separate ring gear 6A, and this ring gear 6A is fixed to the gear body portion 6a with bolts 26. You can do it like this. In this way, when the gear 6 wears out, only the ring gear 6A can be replaced.

Although the gear 6 of the above embodiment has the gear main body portion 6a and the support shaft portion 6b as one body, it goes without saying that they may be made into separate bodies and interlocked and connected by spline fitting. Furthermore, the gear 6 may be configured as an internal gear instead of an external gear as described above.

Further, in the above embodiment, the support shaft portion 6b of the gear 6 is formed into a shaft shape, and the pivot portion 9 of the support bracket 5a is formed into a cylindrical shape, but the support shaft portion 6b is formed into a cylinder shape and the pivot portion 9 is formed into a shaft shape. Of course, you can do so.

(Effect of the invention) In the vibrating roller traveling drive device according to the invention, the support shaft of the gear is provided to protrude outward in the drum axis direction from the gear main body, and this support shaft is attached to the pivot of the support bracket. Since it is supported in a cantilevered manner by a set of bearings, the pivot part and the support shaft part can be arranged in a dead space near the hydraulic motor attached to the support bracket within the end of the drum. The axial length of the drive device can be shortened to make it more compact, and the length from the rib to the end face of the drum can be shortened to improve the structural strength of the end of the drum.

Furthermore, since the distance from the point of application of the load acting on the support bracket from the drum (the midpoint between the two sets of bearings that support the support shaft) to the end face of the drum is extremely short, the maximum bending moment acting on the support bracket is Since the value of is extremely small, it is advantageous in terms of structural strength of the part of the support bracket that is connected to the vehicle body.

Further, since the gear is supported in a cantilever manner on the support bracket as described above, the structure of the pivot portion of the support bracket and the structure of the support shaft portion of the gear are simplified.

In addition, since the support shaft of the gear protrudes outward in the axial direction of the drum from the gear body, by moving the support bracket from the outside into the end of the drum while the gear is fixed to the rib of the drum, The support part and the pivot part can be easily assembled by fitting together.

[Brief explanation of drawings]

Of the drawings, Figures 1 to 3 show an embodiment of the present invention, with Figure 1 being a side view of the vibrating roller, and Figure 2 being a side view of the vibrating roller.
The figures are a cross-sectional view taken along lines taken from FIG. 1, FIG. 3 is a partial view of a modified example corresponding to FIG. 2, FIG. 4 is a view of a conventional device corresponding to FIG. 2, and FIG. This is a partial diagram corresponding to Figure 4. R...Drum, 1...Car body, 2...Drum, 2a...Drum body, 2b, 2c...Rib, 4...Hydraulic motor,
5a, 5b...support bracket, 6...gear, 6a...
Gear main body part, 6b... Support shaft part, 6A... Ring gear, 8... Vibration-proof rubber, 9... Pivotal part, 10... Bearing.

Claims (1)

[Scope of Claim for Utility Model Registration] Support brackets are arranged in series from the left and right sides of the vibrating roller body into the end of the drum, and are positioned outward in the drum axial direction from the ribs of the drum, and one support bracket and the rib In a traveling drive device for a vibrating roller, a gear is arranged concentrically with the drum in between, and a hydraulic motor attached to one of the support brackets rotates the gear fixed to the drum via a vibration isolating rubber. A support bracket is provided for supporting the gear by providing a support shaft protruding outward in the direction of the drum axis from the gear body of the gear, and pivotally supporting the support shaft to a pivot portion of the support bracket via two sets of bearings. A traveling drive device for a vibrating roller, characterized in that the vibrating roller is supported in a cantilevered manner.