JP5745457B2 - Rolling drum - Google Patents

Description

  The present invention relates to a rolling drum for compacting road surfaces and roadbeds.

  In a rolling machine for compacting road surfaces and roadbeds, a rolling drum that also serves as a front wheel or a rear wheel is used. Generally, the structure of a single drum is a plate assembly structure, and the joint portion is welded. That is, the metal plate material is curved and the edges are welded to form a roll. Further, since the partition walls and the like inside the drum are also joined by welding, the number of welding locations and the number of parts when forming the drum is large, manufacturing time is required, and the cost is high.

  In addition, the rolling drum is attached to the vehicle body frame via vibration isolating rubber. The center of gravity of the rolling drum (unsprung), which is a part separated from the vehicle body frame by the vibration isolating rubber, is in the left-right direction. If the center is shifted from the center, the behavior of the compaction machine becomes unstable, so the center of gravity of the drum is preferably in the center.

  Further, it is preferable that the lubricating oil stored in the drum is distributed evenly even when the rolling machine is in use. In Patent Document 1, an oil squeezing means for stirring oil is provided in the drum to improve the lubricity of the bearing.

Japanese Patent Laid-Open No. 11-6111

  However, in the structure of Patent Document 1, the number of parts is still improved and manufacturing time is required. It is more preferable if the number of parts can be reduced, manufacturability can be facilitated, and the center of gravity of the drum can be located in the center.

  The present invention takes the above-mentioned conventional technology into consideration, improves the manufacturability by reducing the number of parts, can easily position the center of gravity of the drum at the center, and can also be used for drum reinforcement and lubricating oil stirring performance. Another object of the present invention is to provide a rolling drum with improved performance.

  In order to achieve the above object, according to the present invention, there is provided a rolling drum that is attached to the body frame via vibration-proof rubber on the left and right sides, and is a substantially cylindrical roll body that rotates while contacting a road surface, and the roll body The first and second partition walls having a substantially disc shape, which are respectively disposed on the left and right sides of the roll body and whose peripheral side surfaces are welded to the inside of the roll body, and both ends are in close contact with the first and second partition walls. A substantially cylindrical inner wall that is concentric with the roll body, a rotating shaft that passes through the first partition wall and is rotated by a motor, and an end portion of the rotating shaft that is formed on the second partition wall. The first and second partition walls and the inner wall are integrally formed of cast steel, and one or both of the first partition wall and the second partition wall has a center of gravity. An adjustment portion is formed, and the first partition wall and the second partition wall are To provide a compaction drum, characterized in that the center of gravity in the lateral direction of the drum is different from each shape so as to be positioned at the center.

Preferably, the center-of-gravity adjusting portion is a rib extending along the inner surface of the roll body.
Preferably, the center-of-gravity adjusting portion is a portion where the first or second partition wall is increased in the thickness direction.

  Preferably, lubricating oil for smoothly rotating the rotating shaft is stored in a space formed by the first and second partition walls and the inner wall, and the center of gravity adjusting portion is disposed on the inner side of the inner wall. It is an inclined rib which protrudes toward and extends in an inclined manner so that the protruding length gradually increases along the longitudinal direction.

  According to the present invention, since the first and second partition walls and the inner wall are integrally formed of cast steel, the internal structure of the roll body can be integrally manufactured using the mold. Therefore, the number of parts is reduced and the number of welded parts is reduced, so that the productivity is improved. A center of gravity adjustment portion is formed on one or both of the first partition wall and the second partition wall, and the first partition wall and the second partition wall have a center of gravity in the left-right direction of the rolling drum. The shapes are different so as to be located in the center. For this reason, the center of gravity of the rolling drum becomes the center, and the behavior when using the rolling machine is stabilized.

  In addition, the center of gravity of the rolling drum can be centered by forming the center of gravity adjustment portion as a rib extending along the inner surface of the roll body so that the shapes of the first partition wall and the second partition wall are different. In addition, the reinforcing effect in the vicinity of the edge of the roll body can be obtained, and as a result, the life of the rolling drum can be extended.

  In addition, if the center of gravity adjustment portion is a portion where the first or second partition wall is increased in the thickness direction, the center of gravity of the rolling drum is centered with a simple design that only changes the thickness of each partition wall. be able to.

  Further, if the center of gravity adjustment portion protrudes toward the inner side of the inner wall and is an inclined rib extending inclining along the longitudinal direction, the volume of the space surrounded by the first and second partition walls and the inner wall is reduced. Therefore, the amount of lubricating oil stored in the space can be reduced. In addition, since the inclined rib is inclined so that the protruding length gradually disappears, even when the rolling machine is tilted in the left-right direction when the rolling machine is used, the lubricating oil is inclined along the top surface of the inclined rib. Oil is reliably supplied also to the part of the upper rotating shaft.

It is a schematic side view of a vibration vehicle. It is a schematic sectional drawing of the state where the rolling drum concerning this invention was attached to the vehicle body frame. It is a schematic longitudinal cross-sectional view of the rolling drum which concerns on this invention. It is a schematic cross-sectional view of an inner wall.

Hereinafter, a vibrating vehicle as an embodiment of a rolling machine using a rolling drum according to the present invention will be described with reference to the drawings.
Referring to FIG. 1, a vibrating vehicle 1 which is a kind of a rolling machine includes a front frame 2 and a rear frame 3 as body frames, and the rear frame 3 has a pair of left and right rear wheels 5 at the rear part thereof. On the other hand, the front frame 2 has a rolling drum 4 that also serves as a front wheel. The rolling drum 4 is rotatably supported by the front frame 2. The front and rear frames 2 and 3 are connected to each other by a joint system via a steering link 12 as a connecting member.

  A cab 10 is provided on the upper portion of the rear frame 3, and the cab 10 is formed in a cab shape. In the cab 10, a handle, a forward / reverse operation lever, a parking switch, instruments, and the like (not shown) are arranged. The operator can get in and out of the cab 10 using steps (not shown) formed on the side surface of the rear frame 3. An engine (not shown) is disposed behind the cab 10 and is covered with an engine cover 9 that can be opened and closed. Further, a tank device (not shown) is disposed at the rear end of the rear frame 3, and this tank device is composed of a fuel tank and a hydraulic oil tank. A hydraulic pump and a charge pump are arranged in the vicinity of the engine (not shown). Each of these pumps is driven by an engine and supplies hydraulic oil sucked up from the hydraulic oil tank to a hydraulic device such as a traveling motor that rotates the rolling drum 4 and the rear wheel 5. The fuel tank included in the tank device stores engine fuel.

  Referring to FIG. 2, the rolling drum 4 according to the present invention is attached to the front frame 2, which is a vehicle body frame, on the left and right sides via vibration proof rubber 6. That is, whether or not it is a member constituting the rolling drum 4 is determined by whether or not it is a part that can be separated from the vehicle body frame via the vibration isolating rubber 6. More specifically, the front frame 2 is arranged on the left and right with respect to the rolling drum 4, and has a right frame 2a and a left frame 2b, respectively. A right bracket 7 a is attached to the right frame 2 a via a bolt 11. A travel motor unit 8 is attached to the right bracket 7a via a bolt 11. The traveling motor unit 8 includes a hydraulic motor and a speed reducer (not shown). The traveling motor unit 8 is attached via a plate 13 and a bolt 11 on the side opposite to the side attached to the right bracket 7a. The plate 13 transmits the rotational force of the motor of the traveling motor unit 8 to the rolling drum 4 through the vibration isolating rubber 6. That is, the substantially cylindrical roll body 21 rotates while contacting the road surface. The anti-vibration rubber 6 is attached to, for example, six plates 13.

  A left bracket 7b is attached to the left frame 2b via a bolt 11. The left bracket 7 b is connected to a bracket 14 that is a part of the rolling drum 4 via a vibration isolating rubber 6. The bracket 14 is provided with a bearing 15, and the rotation of the rolling drum 4 by the traveling motor unit 8 is allowed by the bearing 15. A vibration motor 16 is further attached to the bracket 14. The vibration motor 16 is a hydraulic motor for generating a vibrating force in the rolling drum 4. Specifically, the rotation of the vibration motor 16 is transmitted to the rotary shaft 18 via the socket 17. The socket 17 has a spline structure. Both ends of the rotating shaft 18 are supported by bearings 19a and 19b, respectively. The rotating shaft 18 is rotated at 2000 rpm to 3000 rpm by the vibration motor 16. A weight 25 is attached to the rotary shaft 18 with a bolt 11.

  Bearing bearings 19a and 19b are provided in bearing cases 20a and 20b, respectively. Here, the 1st and 2nd partition walls 22 and 23 are arrange | positioned at the right-and-left both sides of the roll body 21 mentioned above. As for the 1st and 2nd partition walls 22 and 23, the peripheral side is welded and fixed to the inner side of the roll body 21, respectively. The bearing case 20 a is attached to the second partition wall 23 via bolts 11, and the bearing case 20 b is attached to the first partition wall 22 via bolts 11. Therefore, the rotating shaft 18 inserted through the bearing case 20 b passes through the first partition wall 22. The second partition wall 23 supports the end portion of the rotating shaft 18 via the bearing case 20a. The first partition wall 22 and the second partition wall 23 are connected by a substantially cylindrical inner wall 24 that is concentric with the roll body 21. That is, both ends of the inner wall 24 are in close contact with the first and second partition walls 22 and 23, respectively.

  Lubricating oil 26 for smoothly rotating the rotating shaft 18 is stored in a space formed by the first and second partition walls 22 and 23 and the inner wall 24. This lubricating oil 26 is also used for cooling. The lubricating oil 26 is injected or drained using a drain plug 27 provided through the second partition wall 23.

  In the rolling drum 4 according to the present invention, the first and second partition walls 22 and 23 and the inner wall 24 are integrally formed of cast steel. That is, the internal structure formed by the first and second partition walls 22 and 23 and the inner wall 24 can be integrally manufactured using a mold. Therefore, the number of parts is reduced and the number of welded parts is reduced, so that the productivity is improved. Actually, in the case of a small vibrating roller, the amount of welding can be reduced by about 30%.

  Further, in the rolling drum 4 according to the present invention, the center of gravity adjustment portion is formed on one or both of the first partition wall and the second partition wall. Specifically, due to the presence of the center of gravity adjustment section, the first partition wall and the second partition walls 22 and 23 have different shapes so that the center of gravity of the rolling drum 4 in the left-right direction is located in the center. Yes. By having such a gravity center adjusting portion, the position of the gravity center of the rolling drum becomes the center, and the behavior when using the rolling machine is stabilized. Hereinafter, an example of the center of gravity adjustment unit will be described with reference to FIG.

  The center-of-gravity adjusting unit is a rib extending along the inner surface of the roll body 21, for example. In the example of FIG. 3, the ribs 28 a formed on the second partition wall 23 are longer than the ribs 28 b formed on the first partition wall 22. Since the rolling drum 4 in the example of FIG. 3 includes the vibration motor 16, the center of gravity is biased toward the first partition wall 22 side. For this reason, the center of gravity of the rolling drum 4 is positioned in the center by lengthening the ribs 28a. Further, by forming such ribs 28 a and 28 b along the inner surface of the roll body 21, a reinforcing effect at the end of the roll body 21 can be expected. That is, the center of gravity adjusting portion is formed as ribs 28 a and 28 b extending along the inner surface of the roll body 21, so that the shapes of the first partition wall 22 and the second partition wall 23 are made different from each other. The center of gravity can be set to the center, and a reinforcing effect in the vicinity of the end edge of the roll body can be obtained. As a result, the life of the rolling drum can be extended.

  As another center-of-gravity adjustment unit, the first or second partition walls 22 and 23 may be a portion increased in the thickness direction. That is, the first partition wall 22 and the second partition wall 23 may be formed to have different thicknesses (in FIG. 3, the second partition wall 23 is thicker). If the center-of-gravity adjusting portion is formed in this way, the center of gravity of the rolling drum 4 can be centered with a simple design that only changes the thickness of the partition walls 22 and 23.

As another center-of-gravity adjusting portion, an inclined rib 29 protruding toward the inside of the inner wall 24 may be used. Thus, by providing the inclined rib 29 protruding toward the inside of the inner wall 24, the volume of the space surrounded by the first and second partition walls 22, 23 and the inner wall 24 can be reduced. For this reason, the amount of the lubricating oil 26 stored in this space can be reduced. The inclined ribs 29 are inclined and extended so that the protruding length gradually increases along the longitudinal direction of the inner wall 24. In this way, if the inclined rib 29 is inclined so that the protruding length disappears gradually, even when the rolling machine is tilted in the left-right direction when the rolling machine is used, the lubricating oil is transmitted along the top surface of the inclined rib 29. 26 is reliably supplied also to the portion of the rotary shaft 18 on the upper side of the inclination. For example, even if the rolling machine is tilted so that the vibration motor 16 side is downward in FIG. 3, the top surface of the inclined rib 29 is at least substantially horizontal, so that the lubricating oil 26 is transmitted along this top surface to the bearing case 20a. Oil is supplied to the rotating shaft 18 at the end portion on the side. As shown in FIG. 4, at least four inclined ribs 29 are provided at 90 ° intervals in the inner wall 24.
Each example of the center-of-gravity adjustment unit described above may be used alone or in combination.

DESCRIPTION OF SYMBOLS 1 Vibration vehicle 2 Front frame 2a Right frame 2b Left frame 3 Rear frame 4 Rolling drum 5 Rear wheel 6 Anti-vibration rubber 7a Right bracket 7b Left bracket 8 Traveling motor unit 9 Engine cover 10 Driver's cab 11 Bolt 12 Steering link 13 Plate 14 Bracket 15 Bearing 16 Vibration motor 17 Socket 18 Rotating shaft 19a Bearing bearing 19b Bearing bearing 20a Bearing case 20b Bearing case 21 Roll body 22 First partition wall 23 Second partition wall 24 Inner wall 25 Weight 26 Lubricating oil 27 Drain plug 28a Rib 28b Rib 29 Inclined rib

Claims (4)

A rolling drum that is attached to the body frame on both sides via vibration-proof rubber,
A substantially cylindrical roll that rotates while contacting the road surface;
First and second substantially disk-shaped partition walls, which are respectively disposed on the left and right sides of the roll body and whose peripheral side surfaces are welded to the inside of the roll body;
Both ends of the first and second partition walls are in close contact with each other, and a substantially cylindrical inner wall made of a concentric circle with the roll body,
A rotating shaft that passes through the first partition wall and is rotated by a motor;
A bearing formed on the second partition wall and pivotally supporting an end of the rotating shaft;
The first and second partition walls and the inner wall are integrally formed of cast steel,
One or both of the first partition wall and the second partition wall is formed with a center of gravity adjustment portion, and the first partition wall and the second partition wall have a center of gravity in the left-right direction of the rolling drum at the center. Each of the rolling drums is different in shape from each other.   The rolling drum according to claim 1, wherein the center-of-gravity adjusting portion is a rib extending along the inner surface of the roll body.   3. The rolling drum according to claim 1, wherein the center-of-gravity adjusting portion is a portion in which the first or second partition wall is increased in a thickness direction. Lubricating oil for smoothly rotating the rotating shaft is stored in a space formed by the first and second partition walls and the inner wall,
The center-of-gravity adjusting portion is an inclined rib that protrudes toward the inner side of the inner wall and extends so as to gradually increase in length along the longitudinal direction. The rolling drum according to claim 1.

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