JP2017057598A - Maintenance structure for rolling compaction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a maintenance structure for a rolling compaction machine that enables easy performance of retightening work of a nut for connecting hydraulic piping by appropriately arranging each hydraulic apparatus in a hydraulic machine chamber.SOLUTION: A hydraulic machine chamber 17 is defined immediately below a floor panel 16 of a driver seat provided in a rear vehicle body 5, and is opened upward via a maintenance opening 20. First to third base portions 24-26 are erected on a base body 23 of a unit base 21 disposed in the hydraulic machine chamber 17. A traveling changeover valve 28, a manifold block 29 and a differential lock valve 30 are fixed to the base portions 24-26, respectively, and arranged so that front/back positions and vertical positions of the hydraulic apparatuses 28-30 are shifted from each other. Due to this arrangement, a connection portion of a hydraulic hose of each of the hydraulic apparatuses 28-30 is separated from the adjacent hydraulic apparatuses 28-30, so as to secure a sufficient space.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a maintenance structure for a rolling machine, and more particularly to a maintenance structure for maintaining three or more hydraulic devices arranged in parallel in a hydraulic machine chamber from above.

  For example, in the vibrating roller described in Patent Document 1, a hydraulic machine room is defined immediately below a floor plate of a driver seat disposed on a rear vehicle body, and various hydraulic devices are arranged in parallel therein. The hydraulic device is connected to a hydraulic pump and a hydraulic oil tank mounted on the front vehicle body via hydraulic piping, and is connected to a pair of left and right hydraulic motors mounted on the rear vehicle body via hydraulic piping. These hydraulic devices control the supply of hydraulic oil from the hydraulic pump to the left and right hydraulic motors, for example, allow or prohibit differential of the left and right rolling wheels, and switch the rotation speed of the left and right rolling wheels It is.

  For maintenance of each hydraulic device in the hydraulic machine room, a maintenance opening is formed in the floor plate of the driver's seat and is closed with a cover, for example, tightening a nut connecting a hydraulic pipe to the hydraulic device At this time, the cover is removed and the work is performed from above through the maintenance opening.

JP 2002-188113 A

  As described above, the hydraulic piping of each hydraulic device is connected to the hydraulic pump and hydraulic oil tank on the front body side and the hydraulic motor on the rear body side through the hydraulic machine room, ensuring durability in the hydraulic machine room. Hydraulic piping is arranged to keep the minimum bending radius for. In the vibration roller described in Patent Document 1 with priority given to this point, since each hydraulic device is arranged in the hydraulic machine room, little consideration is given to maintainability.

  For this reason, the connection part of a hydraulic device may be close to any part (for example, a casing, a connection part, etc.) of the hydraulic device arranged adjacently. In order to retighten the nut of the connection part, it is necessary to have a space to rotate by engaging the tool with the nut. There was a problem that I could not. Therefore, for example, there is a problem that more complicated work is required such as removing the hydraulic equipment in question and shifting the position to secure a space around the connecting portion and then performing the tightening work.

  The present invention has been made to solve such problems, and the object of the present invention is to retighten nuts for connecting hydraulic pipes by appropriately arranging each hydraulic device in the hydraulic machine chamber. An object of the present invention is to provide a rolling machine maintenance structure that can be easily implemented.

  In order to achieve the above object, a maintenance structure for a rolling compaction machine according to the present invention includes a hydraulic machine room defined in a vehicle body, and a maintenance opening formed to open the hydraulic machine room upward. Three or more hydraulic devices that are juxtaposed in the vehicle width direction in the hydraulic machine chamber and connected to respective hydraulic pipes, and maintenance is performed from above via the maintenance opening, wherein each of the hydraulic devices is a vehicle. The present invention is characterized in that the positions are shifted in the front-rear direction.

  According to the rolling machine maintenance structure of the present invention, each hydraulic device is disposed in the hydraulic machine room so as to be displaced from each other in the vehicle front-rear direction. A sufficient space is secured apart from the hydraulic equipment. Therefore, as part of the maintenance of the hydraulic equipment, when tightening the nut of the connecting part of the hydraulic equipment, it is possible to rotate by engaging the tool with the nut without being disturbed by the adjacent hydraulic equipment, Retightening work can be easily performed.

It is a front view which shows the vibration roller to which the maintenance structure of embodiment was applied. It is the II-II sectional view taken on the line of FIG. 1 which shows the hydraulic machine room provided in the rear vehicle body. FIG. 3 is an enlarged view of FIG. 2 showing an installation state of each hydraulic device in the hydraulic machine room. It is the top view equivalent to the arrow A of FIG. 1 which looked at the hydraulic machine room which removed the cover from upper direction. It is a perspective view which shows a unit base alone.

Hereinafter, an embodiment in which the present invention is embodied in a maintenance structure for a vibration roller vehicle will be described.
FIG. 1 is a front view showing a vibration roller to which the maintenance structure of this embodiment is applied.
The vehicle body of the vibration roller 1 includes a front vehicle body 3 having a front roller wheel 2 and a rear vehicle body 5 having a rear roller wheel 4. The front vehicle body 3 and the rear vehicle body 5 are connected to each other in an articulate manner that can be bent in the horizontal direction via a center pin 6, and the vehicle is turned by bending each other. The front roller wheel 2 is composed of a metal drum having a length substantially corresponding to the vehicle width, and the rear roller wheel 4 is composed of a total of four rubber tires.

  An operation console 8 having a steering 7 is installed at a front position on the rear vehicle body 5, and a driver seat 9 is installed on the rear side of the operation console 8. An operator seated in the driver's seat 9 operates the steering lever 7 and the forward / reverse lever 10 on both sides of the operation table, and in accordance with the operation, the HST (Hydro Static Transmission) driven by the engine mounted in the front vehicle body 3 is operated. The vibrating roller 1 is driven by using the hydraulic pump of FIG.

  A water storage tank 14 storing water is installed on the rear vehicle body 5. The water storage tank 14 is connected to front and rear watering nozzles 12 and 13 disposed near the front and rear rolling wheels 2 and 4 via a pipe and a watering pump (not shown). During the compaction operation, water in the water storage tank 14 is supplied to the watering nozzles 12 and 13 by a watering pump for the purpose of preventing the pavement material from adhering to the front and rear pressure wheels 2 and 4. Water is sprayed onto the pressure wheels 2 and 4.

  2 is a cross-sectional view taken along the line II-II in FIG. 1 showing the hydraulic machine room provided in the rear vehicle body 5, FIG. 3 is an enlarged view of FIG. 2 showing the installation state of each hydraulic device in the hydraulic machine room, and FIG. FIG. 5 is a perspective view showing a unit base as a single unit. FIG. 5 is a plan view corresponding to the arrow A in FIG.

  A hydraulic machine room 17 is defined immediately below the floor plate 16 that forms the foot of the driver's seat 9 on the rear vehicle body 5. The watering machine room 18 defined on the left side of the hydraulic machine room 17 accommodates the watering devices such as the above-described watering pumps and valves, and the liquid material machine room defined on the right side of the hydraulic machine room 17. In 19, liquid agent equipment such as a liquid agent pump and valves for the purpose of preventing adhesion of pavement material as well as watering is accommodated, but the description is omitted because it is not directly related to the present invention.

  A maintenance opening 20 is formed in the floor plate 16 so as to open the hydraulic machine room 17 upward, and the maintenance opening 20 is closed by a cover 20a (shown in FIGS. 2 and 3) that can be attached and detached with bolts. . A unit base 21 made of a steel plate is disposed in the hydraulic machine chamber 17, and its left and right sides are placed on a mounting seat 17 a in the hydraulic machine chamber 17 and fixed with bolts 22.

  As a whole, the unit base 21 is constructed by erecting first to third base portions 24 to 26 on a horizontally disposed base body 23. In the plan view shown in FIG. 4, the first base portion 24 is disposed on the right side in the left-right direction on the base main body 23 and on the front side in the front-rear direction, and the lower surface is welded onto the base main body 23 and faces the left side. 24a. The second base portion 25 is disposed in the center in the left-right direction on the base body 23 and rearward in the front-rear direction, and a horizontal portion 25c is welded to the front surface of the vertical portion 25b bent upward at the rear end of the base body 23. The horizontal portion 25c includes a fixed surface 25a facing upward. The third base portion 26 is disposed on the left side in the left-right direction on the base main body 23 and in the center in the front-rear direction, and includes a fixing surface 26a that is welded on the base main body 23 and faces leftward.

  A travel switching valve 28 is disposed on the fixed surface 24 a of the first base portion 24, a manifold block 29 is disposed on the fixed surface 25 a of the second base portion 25, and a fixed surface 26 a of the third base portion 26. A differential lock valve 30 is provided, and is attached to each of the fixing surfaces 24a to 26a with bolts 31 to 33 in a state of being separated from the base body 23. In the following description, the travel switching valve 28, the manifold block 29, and the differential lock valve 30 may be referred to as hydraulic equipment.

  These hydraulic devices 28 to 30 each have a rectangular parallelepiped shape and are different in size, but are separated from each other by the distance from the base body 23 (travel switching valve 28 <diff lock valve 30 <manifold block 29). Is shifted up and down. For example, as shown in FIG. 3, if the upper surface of the manifold block 29 located at the center in the left-right direction is used as a reference, the upper surface of the travel switching valve 28 is lower than the upper surface by a height difference L1. The upper surface of 30 is at a high position by a height difference L2.

  On the base body 23, the travel switching valve 28, the manifold block 29, and the differential lock valve 30 are juxtaposed in the left-right direction. Specifically, as shown in FIGS. The block 29 is located at the center and the differential lock valve 30 is located on the left side.

  And by arrangement | positioning of each base member 24-26 on the base main body 23 in planar view mentioned above, in the front-back direction, the travel switching valve 28 is necessarily on the front side, the manifold block 29 is on the rear side, and the diff lock valve 30 is on the rear side. They are located in the center and their positions are shifted in the front-rear direction. For example, as shown in FIG. 4, when the front surface of the manifold block 29 located at the center in the left-right direction is used as a reference, the rear surface of the travel switching valve 28 is positioned forward by a front-back difference L3 with respect to the front surface. The front surface of 30 is positioned forward by a front-back difference L4.

  A connecting portion 34 is provided on the front surface of the differential lock valve 30, and a hydraulic hose 35 extending from the hydraulic pump of the front vehicle body 3 is connected to the connecting portion 34. Further, a pair of upper and lower connecting portions 36 (only the upper side is shown in the figure) are provided on the rear surface of the diff lock valve 30, and a hydraulic hose 37 connected to these connecting portions 36 extends rearward so It is connected to a pair of left and right hydraulic motors that drive the pressure wheel 4. The differential lock valve 30 has a function of switching or controlling the supply state of hydraulic oil from the hydraulic pump to the left and right hydraulic motors to allow or prohibit the differential of the left and right rear rolling wheels 4.

  A connecting portion 38 is provided on the left side surface of the travel switching valve 28, and a hydraulic hose 39 extending from the hydraulic pump of the front vehicle body 3 is connected to the connecting portion 38, and the connecting portion 38 is connected to the hydraulic hose 40. Is connected to a connecting portion 41 provided on the left side surface of the differential lock valve 30. The travel switching valve 28 functions to switch the rotational speed of the left and right rear rolling wheels 4 by switching and controlling the supply state of hydraulic oil from the hydraulic pump to the left and right hydraulic motors. Further, the diff lock valve 30 is actuated by the hydraulic oil supplied via the hydraulic hose 40 and exhibits the above-described function.

  A pair of upper and lower connection portions 42 (only the upper side is shown in the figure) is provided on the upper surface of the manifold block 29, and hydraulic hoses 43 extending from the left and right hydraulic motors are connected to these connection portions 42. A connecting portion 44 is provided on the front surface of the manifold block 29, and a hydraulic hose 45 connected to the connecting portion 44 extends forward and is connected to a hydraulic pump of the front vehicle body. After the hydraulic oil discharged from the left and right hydraulic motors merges in the manifold block 29 via the hydraulic hose 43, it is recovered by the hydraulic pump via the hydraulic hose 45 and discharged again.

  A connecting portion 46 is provided on the rear surface of the travel switching valve 28, and a hydraulic hose 47 extending from one hydraulic motor is connected to the connecting portion 46 and extends from the hydraulic oil tank of the front vehicle body 3. The hydraulic hose 48 is connected. The hydraulic oil discharged from one hydraulic motor is guided to the connecting portion 46 of the travel switching valve 28 through the hydraulic hose 47 and further collected in the hydraulic oil tank through the hydraulic hose 48.

  A connecting portion 49 is provided on the front surface of the travel switching valve 28, and a hydraulic hose 50 extending from the other hydraulic motor is connected to the connecting portion 49 and a connecting portion provided on the front surface of the differential lock valve 30. A hydraulic hose 52 extending from 51 (shown in FIG. 3) is connected. Since the hydraulic hoses 50 and 52 are connected to the connecting portion 49 from below, the connecting portion cannot be seen in FIG. The hydraulic oil discharged from the other hydraulic motor and the hydraulic oil discharged from the differential lock valve 30 are guided to the connection portion 49 through the hydraulic hoses 50 and 52, pass through the inside of the travel switching valve 28, and the connection portion 46 described above. To the hydraulic oil tank through the hydraulic hose 48.

  Although a hydraulic brake hose for parking brake is also installed in the hydraulic machine room 17, it is not shown in FIGS. 3 and 4 because it is not directly related to the present invention.

  As described above, the hydraulic hoses are connected to the hydraulic devices 28 to 30, and the flow state of the hydraulic oil in each hydraulic hose is switched and controlled according to the operation of the travel switching valve 28 and the differential lock valve 30. The rotational speed and differential state of the left and right rear rolling wheels 4 driven by the above are switched.

  And the nut which has connected the hydraulic hose to the connection part of each hydraulic equipment 28-30 may loosen. In particular, in the vibration roller 1, the front rolling wheel 2 is vibrated for efficient compaction work, and the vibration tends to act on the nut and easily loosen. As part of the 30 maintenance, regular nut tightening work is very important. In this operation, the cover 20a of the floor board 16 is removed and the maintenance opening 20 is used from above. However, as described in [Problems to be solved by the invention] There was a problem that the tightening work could not be performed in the vicinity of the hydraulic equipment adjacent to the connecting portion of the equipment.

In the present embodiment, the above-described arrangement of the hydraulic devices 28 to 30 makes it possible to perform the tightening operation by separating the adjacent hydraulic devices 28 to 30 from the connection portion, which will be described in detail below.
Expressed simply, the above-described arrangement of the hydraulic devices 28 to 30 is a knowledge that if the positions of the hydraulic devices 28 to 30 are shifted from each other, the positions of the connecting portions are also shifted and separated from the counterpart hydraulic devices 28 to 30. It is based on. That is, since the hydraulic devices 28 to 30 are juxtaposed in the left-right direction, the front-rear direction and the up-down direction can be considered as directions in which the positions of the hydraulic devices 28-30 should be shifted.

  Since the proximity to the connection is a problem in the hydraulic devices 28 to 30 arranged next to each other, the positional relationship between the travel switching valve 28 and the manifold block 29, and the manifold block 29 and the diff lock valve 30 This positional relationship is important, and the positional relationship between the travel switching valve 28 and the diff lock valve 30 arranged with the manifold block 29 in between is not so important.

  As described above, since the rear surface of the travel switching valve 28 is positioned forward by the front-rear difference L3 with respect to the front surface of the manifold block 29, the counterpart hydraulic devices 28, 29 are front-rear with respect to any connection portion. Separated in the direction. Moreover, since the upper surface of the travel switching valve 28 is at a lower position than the upper surface of the manifold block 29 by the height difference L1, the counterpart hydraulic devices 28 and 29 are spaced apart from each other in the vertical direction. ing.

  As a result, a sufficient space is secured between the connection portions 42 and 44 of the manifold block 29 and each part (for example, a casing and a connection portion) of the travel switching valve 28, and the connection portions 46 and 49 of the travel switching valve 28. And a sufficient space is secured between each part of the manifold block 29.

  Further, since the front surface of the differential lock valve 30 is positioned forward of the front / rear difference L4 with respect to the front surface of the manifold block 29, the counterpart hydraulic devices 29, 30 are separated from each other in the front / rear direction. doing. In addition, since the upper surface of the differential lock valve 30 is at a higher position than the upper surface of the manifold block 29 by the height difference L2, the counterpart hydraulic devices 29, 30 are spaced apart from each other in the vertical direction. Yes.

  As a result, a sufficient space is secured between the connection portions 42 and 44 of the manifold block 29 and each portion of the diff lock valve 30, and each of the connection portions 34, 36, 41, 51 of the diff lock valve 30 and each of the manifold block 29. Sufficient space is secured also between the parts.

  Therefore, when tightening the nut at the connection portion of each hydraulic device 28-30, the tool can be engaged with the nut and rotated without being obstructed by the adjacent hydraulic device 28-30. The fastening operation can be easily performed.

  In addition, as a matter of special mention, it is necessary to arrange the hydraulic hoses within the hydraulic machine room 17 while keeping the minimum bending radius for ensuring the durability. In this embodiment, adjacent hydraulic devices 28 to 30 are connected to each other. The effect on the bending radius of the hydraulic hose is negligible because it is slightly shifted in the front-rear direction and the vertical direction. Therefore, after arranging the hydraulic hose while keeping the minimum bending radius, it is possible to obtain the operational effect relating to the maintenance property.

  Further, the first to third base portions 24 to 26 are erected on the base body 23 of the unit base 21, and the hydraulic devices 28 to 30 are fixed to the base portions 24 to 26 in a state of being separated from the base body 23. Accordingly, the vertical positions of the hydraulic devices 28 to 30 are shifted by the arrangement of the base portions 24 to 26 on the main body base 23 in plan view. As described above, the simple configuration in which the base portions 24 to 26 are erected on the base body 23 can naturally shift the positions of the hydraulic devices 28 to 30 back and forth and up and down, thereby reducing the manufacturing cost. be able to. Moreover, in the production process of the vehicle 1, the hydraulic devices 28 to 30 are assembled in advance in the unit base 21 outside the easy-to-work hydraulic machine chamber 17, and then assembled into the hydraulic machine chamber 17. Can greatly improve the performance.

  This is the end of the description of the embodiment, but the aspect of the present invention is not limited to this embodiment. For example, in the above embodiment, the vibration roller 1 is embodied, but the type is not limited to this and can be arbitrarily changed. Therefore, for example, it may be applied to a Macadam roller or a tire roller.

  In the above embodiment, the travel switching valve 28, the manifold block 29, and the differential lock valve 30 are disposed in the hydraulic machine chamber 17 as hydraulic equipment, but the type of hydraulic equipment is not limited to this and can be arbitrarily changed. The number of hydraulic devices 28 to 30 may be any number as long as it is 3 or more.

Moreover, in the said embodiment, since the maintenance opening part 20 was formed in the floor board 16 of the driver's seat 9, the cover 20a was provided in order to prevent intrusion of dust etc., but this may be abbreviate | omitted. Furthermore, when the maintenance opening 20 is formed in a place where there is no risk of entry of dust or the like, mesh-like grating may be used as a cover.
In the above embodiment, the hydraulic hoses 35, 37, 39, 40, 43, 45, 47, 48, 50, and 52 are used as the hydraulic piping. However, instead of this, a hydraulic piping made of steel pipe may be used. .

1 Vibration roller (rolling machine)
4 Rear rolling wheel 5 Rear body (body)
DESCRIPTION OF SYMBOLS 9 Driver's seat 16 Floor board 17 Hydraulic machine room 20 Maintenance opening part 20a Cover 21 Unit base 24 1st base part 25 2nd base part 26 3rd base part 24a, 25a, 26a Fixed surface 28 Travel switching valve (hydraulic equipment)
29 Manifold block (hydraulic equipment)
30 Differential lock valve (hydraulic equipment)
35, 37, 39, 40, 43, 45, 47, 48, 50, 52 Hydraulic hose (hydraulic piping)

Claims (5)

A hydraulic machine room defined in the car body,
A maintenance opening formed to open the hydraulic machine room upward;
Three or more hydraulic devices that are juxtaposed in the vehicle width direction in the hydraulic machine chamber and connected to respective hydraulic pipes, and maintenance is carried out from above via the maintenance opening,
A maintenance structure for a rolling compaction machine, wherein each of the hydraulic devices is disposed with a position shifted from each other in the vehicle longitudinal direction. 2. The maintenance structure for a rolling compaction machine according to claim 1, wherein each of the hydraulic devices is disposed so as to be displaced from each other in the vertical direction as well as in the front-rear direction. A unit base is disposed in the hydraulic machine chamber;
The said each hydraulic equipment is being fixed to the fixed surface of the base part each provided on the said unit base in the state which mutually shifted the front-back position and the up-down position. Maintenance structure for rolling machine. The maintenance opening is formed in a floor plate of a driver's seat disposed on the vehicle body, and a removable cover for closing the maintenance opening is disposed on the floor plate. The maintenance structure of the compaction machine in any one of 1 thru | or 3. A hydraulic pump and a hydraulic oil tank are mounted either before or after the hydraulic machine chamber of the vehicle body, and hydraulic oil is supplied from the hydraulic pump to the other side of the hydraulic machine chamber so A pair of left and right hydraulic motors that individually drive the pressure wheels are installed,
As the hydraulic equipment,
A differential lock valve that controls switching of the supply state of hydraulic oil from the hydraulic pump to the left and right hydraulic motors, and allows or prohibits differential of the left and right rolling wheels;
A travel switching valve that switches the rotational speed of the left and right rolling wheels by switching control of the supply state of hydraulic oil from the hydraulic pump to the left and right hydraulic motors;
The maintenance structure for a rolling compactor according to any one of claims 1 to 4, further comprising a manifold block that joins the hydraulic oil returned from the left and right hydraulic pumps and collects the hydraulic oil in the hydraulic oil tank.

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