JP3131344U - Drum support structure for compaction roller - Google Patents

Abstract

A rubber bendable ring-shaped sealing material is slidable on a sliding surface between an inner peripheral surface of an end of a drum bracket that does not rotate and a cylindrical outer peripheral surface of a rotating gear plate. Install to prevent dust and muddy water from entering the drum bracket.
A ring shape having an inverted U-shaped cross section is provided between the end plate opening 17 of the drum bracket 13 that does not rotate and the cylindrical outer peripheral surface 19a of the rotating gear plate 19 and the end plate 14 along the circumferential direction. The sealing material 18 and the ring-shaped sealing material 28 having a V-shaped cross section are provided in multiple stages so as to be slidable.
[Selection] Figure 1

Description

  The present invention relates to a drum support structure for a compaction roller for compacting a ground while vibrating a pair of front and rear roller drums disposed on the front and rear of a vehicle body.

  As shown in FIG. 5, the drum support structure of the compaction roller in the prior art is such that one end 3a is fixedly supported by the machine body 2 between the roller drum 1 and the machine body 2, and the other end 3b is attached to the end plate of the drum 1. 4 is provided with a drum bracket 3 projecting in the surface direction, and a shaft end 5a of the drive shaft 5 projecting outside the end plate 4 of the drum 1 is rotatably supported in the drum bracket 3, A structure is known in which the rotation of a hydraulic motor 6 provided in No. 3 is transmitted to the drive shaft end 5a to rotate the drum 1.

  In this drum support structure, even if the drum 1 is rotated by the rotation of the hydraulic motor 6, the drum bracket 3 that supports the hydraulic motor 6 is fixedly supported by the machine body 2 without rotating, so that the drum bracket 3 is inserted into the drum bracket 3. The sliding surface between the outer peripheral surface 9a of the gear plate 9 at the rotating drive shaft shaft end 5a and the inner peripheral surface 7a of the end plate-side opening 7 of the drum bracket 3 that does not rotate is disposed outside the drum bracket 3. A sealing material 8 for preventing adhering earth and sand from entering the drum bracket 3 is arranged so as to be slidable along the circumferential direction.

  The sealing material 8 includes a groove 7b provided in the inner peripheral surface 7a of the end plate side opening 7 in the drum bracket 3 that does not rotate, and a rotating gear plate 9 for closing the end plate side opening 7 of the drum bracket 3. Between the cylindrical outer peripheral surface 9a, a felt ring-shaped sealing member is arranged so as to slidably contact along the circumferential direction of the cylindrical outer peripheral surface 9a.

  The drum support structure of the roller is such that a felt ring seal is provided between the inner peripheral surface 7a of the end plate side opening of the drum bracket 3 that does not rotate and the gear plate cylindrical outer peripheral surface 9a of the rotating drive shaft end 5a. Since the material 8 is interposed in a slidable state, the grease injected into the drum bracket 3 is infiltrated into the felt fiber of the seal material 8, and the end plate side opening inner peripheral surface 7a and the gear plate cylindrical shape It smoothly rotates and slides between the outer peripheral surface 9a and prevents dust and muddy water from entering the drum portion through the gap between the sliding surfaces.

  However, the sliding surface between the end plate-side opening inner peripheral surface 7a of the drum bracket 3 and the gear plate cylindrical outer peripheral surface 9a as described above can be slid by the ring-shaped sealing material 8 made of felt. If the drum 1 is used in such a way that it frequently passes through a muddy road surface during operation, the roller drum 1 may be subjected to vibration due to negative pressure. There was a problem that a part of muddy water adhering to the outer surface of the bracket 3 entered the drum bracket 3 through the sliding surface.

  When not only muddy water enters the drum bracket 5 but also compacts the dry road surface, the output shaft gear 6a of the hydraulic motor 6 is built in the dust that adheres to the outer surface of the drum bracket 3. Dust adhering in a narrow gap A between the drum bracket upper back surface portion 3b and the drum end plate 4 passes between the fibers of the felt ring-shaped sealing material 8 and enters the drum bracket 3.

  When dust or mud enters into the drum bracket 3 in this way, the invading dust or mud mixes with the grease in the drum bracket 3 and adheres to the meshing surface of the gear and the gear, causing extremely large damage to the surface. Therefore, there is a problem that parts need to be replaced in a short period of time.

  As a means for solving the problems of this type of drum support structure in the prior art, the sliding between the inner peripheral surface of the end plate side opening of the drum bracket that does not rotate and the cylindrical outer peripheral surface of the rotating gear plate Rubber bendable seal material is slidably mounted on the surface to prevent mud and dust adhering to the outer peripheral surface of the drum bracket from entering the drum bracket through the sliding surface. A drum support structure is provided.

  In the drum support structure according to the present invention, as a specific means for that purpose, the shaft end of the drive shaft protruding outside the drum end plate is rotatably fixed in the drum bracket fixedly supported by the body support frame. In the drum support structure of the compaction roller, a cylindrical outer peripheral surface of the gear plate for closing the end plate side opening of the drum bracket through which the shaft end of the drive shaft is inserted, and an inner peripheral surface of the end plate side opening of the drum bracket The rubber ring-shaped sealing material having an inverted U-shaped cross section is disposed so as to be slidable along the circumferential direction, and is positioned outside the ring-shaped sealing material made of rubber having an inverted U-shaped cross section. A rubber ring-shaped sealing material having a V-shaped cross section is slid along the circumferential direction between the case back surface of the drum bracket and the outer surface of the end plate while one inclined seal side is in surface contact with the side surface of the end plate. Characterized in that the sea urchin arranged.

  In the drum support structure of the present invention, a rubber ring-shaped sealing material having an inverted U-shaped cross section is provided on the sliding surface between the inner peripheral surface of the end plate side opening of the drum bracket that does not rotate and the cylindrical outer peripheral surface of the rotating gear plate. Because both seal sides that can be bent are in contact with the cylindrical outer peripheral surface of the gear plate along the circumferential direction, the tip of both seal sides has a small frictional resistance between the outer peripheral surface of the gear plate and the cylindrical shape. Contact can be expected to rotate smoothly, and flexibly responds to drum vibrations to accurately prevent dust and muddy water adhering to the outer surface of the drum bracket from entering the drum bracket. it can.

  Furthermore, in the drum support structure of the present invention, between the bracket case rear surface and the outer surface of the end plate, which is located outside the reverse U-shaped rubber ring-shaped sealing material in the end portion of the drum bracket on the end plate side, in the circumferential direction. A rubber ring-shaped sealing material having a V-shaped cross section is arranged so that one inclined seal side slides while being in surface contact with the side surface of the end plate. And the dust and mud adhering in the narrow gap A between the back portion 5b of the drum bracket and the outer peripheral surface 4 of the end plate are accumulated on the V-shaped seal side, Intrusion in the direction of the cross-section inverted U-shaped seal material inside the gap between the back surface and the outer surface of the end plate is prevented.

  As described above, the drum support structure of the present invention has a cross section having a flexible sealing edge on the sliding surface between the inner peripheral surface of the end plate side opening of the drum bracket that does not rotate and the cylindrical outer peripheral surface of the rotating gear plate. Since the reverse U-shaped rubber ring-shaped sealing material and the rubber ring-shaped sealing material having a V-shaped cross section are provided between the back surface of the bracket case and the outer surface of the end plate, the sealing edges of the respective sealing materials Can bend and respond well to drum vibrations and reliably block the intrusion of dust and mud. As a result, the dust / mud that has traditionally been a problem with this type of roller is contained in the drum bracket. It is possible to provide a durable compacting roller that accurately eliminates the harmful effect of intruding and mixing with grease and causing wear damage to the gear surface.

  In this drum support structure, a rubber ring-shaped sealing material having an inverted U-shaped cross section is provided on the sliding surface between the inner peripheral surface of the end plate side opening of the drum bracket that does not rotate and the cylindrical outer peripheral surface of the rotating gear plate. Therefore, although this sealing material alone can prevent intrusion of dust and mud into the drum bracket, the cross section is V-shaped between the bracket case rear surface and the outer surface of the end plate located outside the sealing material. By providing the rubber ring-shaped sealing material in multiple stages, it is possible to effectively prevent dust and mud from entering the drum bracket.

  Next, the drum support structure will be described with reference to the embodiment shown in the drawings. FIG. It is provided in the drum 11 shown in FIGS.

  As shown in FIGS. 3 and 4, a drum support frame 20 for fixing and supporting both upper side portions of the drum 11 is provided at the lower part of the machine body 12 on which devices such as an engine and a hydraulic pump are mounted. As shown in FIG. 1, a drum bracket 13 for supporting the machine body 12 on the drum 11 is provided between the back surface of the drum support frame 20 and the end plate 14 provided at a position deeper from the opening end 11 a of the drum 11. Is provided.

  An opening 17 through which the shaft end 15 a of the drive shaft 15 is inserted is provided on the back surface of the drum bracket 13 on the end plate 14 side so as to have a boss 25 on the inner periphery. The inserted drive shaft shaft end 15 a is mounted on a bearing 21 provided in the drum bracket 13.

  A hydraulic motor 16 is provided at one upper end of the drum bracket 13, an output shaft gear 22 that is rotated by the hydraulic motor 16 is provided inside the drum bracket 13, and the bearing 21. An input shaft gear 23 that engages with the output shaft gear 22 is provided at a drive shaft end 15 a that is mounted on the shaft.

  The input shaft gear 23 is fixed to a pedestal 24 fixed to the outer surface of the end plate 14 via a bolt 29. Before the input shaft gear 23 is bolted to the pedestal 24, the pedestal 24 and the input shaft gear 23 are fixed. A gear plate 19 for closing the opening 17 provided on the rear surface of the drum bracket 13 on the end plate 14 side is attached.

  The gear plate 19 is fitted so that a cylindrical outer peripheral surface 19a provided on the outer edge is slidable on the inner peripheral surface 17a of the drum bracket opening 17, and the rear surface of the drum bracket 13 on the end plate 14 side is the gear. The plate 19 is supported by a cylindrical outer peripheral surface 19a.

  As described above, when the input shaft gear 23 is bolted to the pedestal 24 in a state where the gear plate 19 is disposed between the pedestal 24 and the input shaft gear 23, the gear plate 19 is rotated by the rotation of the gears 22 and 23. While rotating, the rear opening 17 of the fixed drum bracket 13 is supported to transmit the rotation to the drum 11.

  An inverted U-shaped cross section at a position along the circumferential direction between the cylindrical outer peripheral surface 19a of the gear plate 19 fitted in the end plate side opening 17 of the drum bracket 13 and the inner peripheral surface 17a of the opening of the drum bracket 13. The rubber ring-shaped sealing material 18 is slidable.

As shown in FIG. 2, a concave groove 26 for embedding the base end portion 18 a of the sealing material 18 is provided in the opening inner peripheral surface 17 a of the drum bracket 13 along the inner peripheral direction. With the portion 18a fitted in the concave groove 26 and fixed to the inner peripheral surface 17a of the opening, the tips of the seal sides 18b and 18c on both sides are slid while freely contacting the gear plate cylindrical outer peripheral surface 19a. The dust and muddy water that moves and adheres to the outside of the drum bracket 13 are prevented from entering the drum bracket 13.

  Further, a concave groove 27 is formed on the outer side of the boss 25 in the opening 17 of the drum bracket 13 so as to bite into the case back side of the drum bracket 13, and the circumference between the concave groove 27 and the outer surface of the end plate 14 is provided. A rubber ring-shaped sealing material 28 having a V-shaped cross section is provided at a position along the direction so that one inclined seal side 28a slides while being in surface contact with the side surface of the end plate 14 so as to be freely bent. Dust and muddy water adhering to the back side of the case are prevented from entering in the direction of the inner cross-section inverted U-shaped rubber ring-shaped sealing material 18.

  In the drum support structure of the present invention, a rubber-made inverted U-shaped ring seal is provided between the end plate-side opening 17 of the non-rotating drum bracket 13 and the cylindrical outer peripheral surface 19a of the rotating gear plate 19 and the end plate 14. Since the material 18 and the ring-shaped seal member 28 having a V-shaped cross section are provided in multiple stages, it is possible to provide a drum support structure that can accurately prevent intrusion of dust and muddy water at low cost.

Sectional drawing which shows the structure in the drum provided with the drum support structure of this invention. 1 is an enlarged sectional view of a part of FIG. The side view of the compaction roller provided with the drum support structure of this invention. The rear view of the roller in which the drum support structure of this invention is similarly provided. Sectional drawing which shows this kind of conventional drum support structure.

Explanation of symbols

11: Roller drum,
12: Aircraft,
13: Drum bracket
14: End plate
15: Drive shaft,
16: hydraulic motor,
17: opening,
18: Cross-section inverted U-shaped ring-shaped sealing material,
19: gear plate,
20: drum support frame,
21: bearing,
22: output shaft gear,
23: input shaft gear,
24: Pedestal
25: Boss
26: concave groove,
27: concave groove,
28: Cross-section V-shaped ring-shaped sealing material

Claims (1)

In the drum support structure of the compaction roller that rotatably supports the shaft end of the drive shaft projected outside the drum end plate in the drum bracket fixedly supported by the machine body support frame,
Between the cylindrical outer peripheral surface of the gear plate for closing the end plate side opening of the drum bracket through which the shaft end of the drive shaft is inserted, and the inner peripheral surface of the end plate side opening of the drum bracket A rubber ring-shaped sealing material having an inverted U-shaped cross section is slidably disposed along the outer periphery of the boss between the case back surface of the drum bracket and the outer surface of the end plate in the circumferential direction. A drum support structure for a compaction roller, characterized in that a rubber ring-shaped sealing material having a V-shaped cross section is arranged so that one of the inclined sealing sides slides in surface contact with the side surface of the end plate.

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