JP6704371B2 - Rolling machine - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a compaction machine in which a running engine is mounted in the center of a vehicle body such as a tire roller vehicle.

  Many tire roller vehicles (rolling machines) are provided with equipment for sprinkling water in order to prevent the asphalt mixture from adhering to the rolling rollers (tires) and to reduce the road surface temperature of the asphalt surface, which becomes a high temperature. Since much water is consumed for watering, in a tire roller vehicle, an engine room with an open upper side (a space for the running engine) is provided in the center of the vehicle body, and water for watering is placed around this engine room. A large amount of water is secured by using a large part of the vehicle body as a water tank by surrounding the stored water tank.

For cooling the running engine set in the engine room of such a tire roller vehicle, a radiator (heat exchanger) is provided in the engine room adjacent to the running engine, and between the radiator and the running engine, A structure in which a cooling fan unit for cooling the radiator with cooling air is provided is used.
Conventionally, as the cooling fan unit, a fan that is directly driven by the axial torque of a traveling engine is used as disclosed in the cited document 1, and the radiator is cooled by the cooling air generated by the rotating fan.

  However, the structure using a fan that is directly driven by the driving engine rotates the fan depending on the operation of the driving engine regardless of the temperature of the cooling water of the radiator, so the radiator can be cooled efficiently. There is a problem that is not lost, and noise (wind noise) is likely to occur.

  On the other hand, in a construction machine such as a hydraulic excavator, a structure has been proposed in which a fan driving motor, for example, a hydraulic motor is used to drive the fan according to the temperature of the cooling water, as disclosed in Reference 2. There is. In particular, the same structure uses a fan shroud that surrounds the fan and the fan driving motor. Not only does it reduce noise, but it also cools the radiator efficiently by guiding cooling air to a predetermined position. Is being done.

  Therefore, it is conceivable to apply the technique of the cooling fan unit of the above cited reference 2, that is, the cooling fan unit including a fan shroud, a fan driving motor, and a fan to the cooling fan unit of the tire roller vehicle.

JP, 2014-218779, A JP 2001-355444 A

When the cooling fan unit that drives the fan by the drive motor is applied, the drive motor is required to be inspected from the outside in order to prevent problems. Especially in the case of a hydraulic motor, there is a risk of oil leakage and malfunction of parts, so external inspection is essential.
By the way, unlike other machines, the tire-roller vehicle has a water tank for watering, which surrounds the engine room that houses the running engine and radiator.The engine room is open only on the upper side. It

However, since the fan drive motor that needs to be inspected is arranged inside the fan shroud and shielded from the outside, it is difficult to inspect only from the open side of the engine room that communicates with the outside. Moreover, the space between the fan shroud and the running engine is narrow, and it is difficult to secure space for inspection.
For this reason, even though we recognize that the fan drive motor is excellent in improving the cooling performance of the radiator and reducing noise, it is not possible to ensure the checkability, so it can be applied to tire roller vehicles (rolling machines) with many restrictions. It was said to be difficult to apply.

Therefore, an object of the present invention is to reduce noise and improve checkability and coolability of a heat exchanger by using a cooling fan section having a fan shroud and a hydraulic motor in an engine room surrounded by a water tank. It is to provide a compaction device that can improve

Aspects of the present invention include an engine room, which is formed in a vehicle body, has an open upper portion, and is surrounded by a water tank that stores water for watering, a traveling engine housed in the engine room, and a traveling engine. A heat exchanger that is housed in the engine room adjacent to the engine and cools the running engine, and a cooling fan unit that is provided between the heat exchanger and the running engine and cools the heat exchanger with cooling air. The cooling fan unit is provided with a fan that generates cooling air, a hydraulic motor that drives the fan, and the fan and the hydraulic motor so as to surround the fan and the hydraulic motor . It has a fan shroud that guides it and an inspection window that is provided above the fan shroud that faces the open side of the engine room and that checks the inside of the fan shroud. By being made into parts, it can be taken out from the open side of the engine room, and the inspection window has an inspection opening provided on the upper wall of the fan shroud, an inspection cover that closes the inspection opening, and an inspection opening. Has a fastening portion that removably fastens the inspection cover to the fan shroud by screwing the fastening member into the fastening seat formed on the opening edge portion of the cooling fan portion from the engine room. It is to be detachable from the tool for taking out work .

ADVANTAGE OF THE INVENTION According to this invention, in the engine room where the circumference|surroundings were surrounded by the water tank, the cooling fan part which has a fan shroud and a hydraulic motor was used, noise reduction, the improvement of checkability, and a heat exchanger. It is possible to improve the cooling performance of the. In addition, when it is required to carry out, the entire cooling fan unit can be carried out from the engine room without using a separate suspender.

1 is a perspective view showing a tire roller vehicle (rolling machine) according to an embodiment of the present invention. The side view of the tire roller vehicle. The perspective view which expands and shows the engine room of the tire roller vehicle, and its periphery. Sectional drawing which follows the AA line in FIG. FIG. 3 is an exploded perspective view showing each part of the cooling fan part.

Hereinafter, the present invention will be described based on an embodiment shown in FIGS. 1 to 5.
1 shows an entire rolling machine, for example, a tire roller vehicle, FIG. 2 shows a side view of the tire roller vehicle, FIG. 3 shows an enlarged engine room of the tire roller vehicle, and FIG. A cross section of the engine room (line AA in FIG. 3) is shown, and FIG. 5 shows each part of the cooling fan part.

  Each part of the tire roller vehicle will be described. In FIG. 1 and FIG. 2, reference numeral 1 denotes a vehicle body extending in the vehicle front-rear direction, and 3 denotes a front side compaction roller provided in a tire house 1a at a front portion of the vehicle body 1. Reference numeral 5 denotes a rear roller roller provided in the tire house 1b at the rear of the vehicle body 1, 7 denotes a driving deck provided in the middle of the vehicle body 1, and 9 denotes a central portion of the vehicle body 1, for example, the driving deck 7. The engine room provided in the front side vehicle body part 8 as a boundary is shown. Each part of the vehicle body 1 is configured by combining frame members made of sheet metal, for example. 1 and 2, the arrow F indicates the front direction of the tire roller vehicle, and the arrow R indicates the rear direction of the tire roller vehicle.

  As shown in FIGS. 1 to 4, the engine room 9 is formed, for example, in the upper portion of the front side vehicle body portion 8 and has a recess 11 having an open upper portion and an engine hood 13 for opening and closing the open portion of the upper portion of the recess 11. (Illustrated in FIGS. 1 and 2). The recess 11 is arranged in the center of the vehicle body 1 in the vehicle width direction, and the front side extends to the vicinity of the tire house 1 a and the rear side to the vicinity of the driving deck 7.

  Around the engine room 9 that occupies most of the vehicle body 1, for example, on the left and right sides in the vehicle width direction and on the lower side of the engine room 9 shown in FIGS. The box-shaped water tanks 12a to 12c configured by are formed along the engine room 9 and have a structure in which a large amount of water for sprinkling is stored. In other words, the engine room 9 is blocked by the tire house 1a and the driving deck 7 in the front-rear direction, is surrounded by the water tanks 12a to 12c on both sides and the lower portion in the vehicle width direction, and only the upper portion of the engine room 9 is open. It is an engine room with. By the way, each of the water tanks 12a to 12c includes a road surface water spray nozzle 14 and a tire water spray nozzle 14a (FIGS. 1 and 2) installed in front of and behind the vehicle body 1 via a water spray pump and a water spray flow path (neither is shown). When the water spray switch (not shown) is turned on, the water in the water tanks 12a to 12c is sprayed from the road surface water spray nozzle 14 and the tire water spray nozzle 14a.

  On the rear side (vehicle front-rear direction) in the engine room 9, a water-cooled traveling engine 15 is installed together with a hydraulic pump 17 driven by the engine 15. The hydraulic pump 17 is connected to, for example, a hydraulic motor (not shown) provided on the rear pressure roller 5 via a hydraulic circuit (not shown), and the rear pressure roller 5 is driven by the hydraulic pressure generated by the hydraulic pump 17. That is, the tire roller vehicle is driven.

  Further, as shown in FIGS. 1 to 4, on the front side (in the vehicle front-rear direction) in the engine room 9, a heat exchanger that is adjacent to the traveling engine 15 and cools the cooling water of the traveling engine 15, An air-cooled radiator 19 is installed in the air conditioner. The radiator 19 is arranged so as to block the engine room 9 from the vehicle width direction. In front of the radiator 19, a duct portion 20 is formed that connects the radiator 19 and a ventilation portion (not shown) formed in the engine hood 13 to each other.

  The radiator 19 includes a plate-shaped heat exchange section 19a (consisting of water channels and fins) arranged so as to block the front direction of the running engine 15, an upper tank section 19b provided above the heat exchange section 19a, and a heat The lower tank portion 19c is provided below the exchange portion 19a, and the cooling water flows through the upper tank portion 19b, the heat exchange portion 19a, and the lower tank portion 19c. An inlet portion (not shown) provided at the center of the upper tank portion 19b in the vehicle width direction is provided with a cooling pump (not shown) incorporated in the traveling engine 15 via a hose member 21 (only a portion is shown in FIG. 3). ) Is connected to the cooling water inlet (not shown) of the traveling engine 15 via a hose member to connect the cooling water to the radiator 19. Thus, the traveling engine 15 is cooled.

  Further, as shown in FIGS. 1 to 4, a cooling fan unit 25 that cools the radiator 19 with cooling air is provided between the radiator 19 and the traveling engine 15. The cooling fan unit 25 includes a fan shroud 27 arranged so as to surround the heat exchange unit 19 a of the radiator 19, a fan driving motor installed in the fan shroud 27, such as a hydraulic motor 29, and the hydraulic motor 29. It has a fan 31 attached to the output part (FIGS. 3 to 5). The fan 31 has a structure in which a plurality of impellers 31a are arranged in the circumferential direction. Incidentally, the cooling fan unit 25 uses a suction method.

  More specifically, as shown in FIG. 5, the fan shroud 27 has a rectangular frame-shaped ventilation guide portion 28 that surrounds the space between the radiator 19 and the traveling engine 15 immediately in front thereof. The radiator 19 side of the ventilation guide portion 28 has a rectangular opening portion 27 a facing the radiator 19. Further, the traveling engine 15 side is covered with a wall portion 27c having a fan through hole 27b formed therein, so that the radiator 19 and the immediately preceding portion of the traveling engine 15 are communicated with each other.

  A hydraulic motor 29 having a fan 31 directly connected thereto is assembled in the fan shroud 27. The fan 31 fits into the fan through hole 27b. That is, the cooling fan unit 25 is made into one component, that is, a module by combining the fan shroud 27, the hydraulic motor 29, and the fan 31. By the way, the hydraulic motor 29 is detachably fixed to the inner surface of the fan shroud 27 via a support member 33 which is partially shown in FIG. Further, the impeller 31a portion protruding from the fan through hole 27b is protected by the fan guard 35.

  The hydraulic motor 29 is connected to the hydraulic pump 17 via, for example, a hydraulic circuit (not shown) whose rotation speed can be controlled according to the temperature of the cooling water. When actuated, the fan 31 is driven to guide cooling air from the engine room 9 to the radiator 19 located at a predetermined position to cool the cooling water of the radiator 19 (suction system). By the way, the engine hood 13 is provided with a grill part (not shown) for taking in outside air.

  Further, the cooling fan unit 25 modularized as shown in FIGS. 3 to 5 is installed so as to be taken out from the open portion (open side) in the upper part of the engine room 9. In this structure, for example, a pair of support pieces 37 are projected from both sides of the radiator 19 in the vehicle width direction so as to overlap with both side portions of the fan shroud 27 in the vehicle width direction, and these support pieces 37 and both side portions of the fan shroud 27 in the vehicle width direction are projected. A fixing structure is used in which a fastener, for example, a plurality of bolt members 39 and nut members 40 are detachably fastened. That is, if the bolt member 39 is removed, the fixing of the cooling fan unit 25 is released, and the cooling fan unit 25 can be drawn out to the open portion (open side) of the engine room 9. Of course, other structures may be used.

The hydraulic motor 29 incorporated in the fan shroud 27 is a component that needs to be inspected (to confirm oil leakage and condition).
Therefore, the fan shroud 27 is provided with only the inspection window 41 that allows the inside of the fan shroud 27 to be inspected from the upper portion (open side) of the open engine room 9.

  As shown in FIGS. 4 and 5, the inspection window 41 includes an inspection opening 43 provided on the upper wall 28a of the fan shroud 27 (ventilation guide portion 28) facing the open side of the engine room 9 and the inspection opening portion. It has a plate-like inspection cover 45 that closes 43 and a fastening portion 47 that removably fastens the inspection cover 45 to the upper wall 28a.

  Specifically, the inspection opening portion 43 has openings (two) in the upper wall portions on both sides of the hose member 21 that avoid the hose member 21 of the upper wall 28a through which the hose member 21 of the radiator 19 passes. Formed and configured. Each of the openings communicates the inside and the outside of the fan shroud 27, and has a size and a shape that allow the operator's arm to be inserted. In other words, from the opening side of the engine room 9 through the inspection opening 43, the parts in the fan shroud 27 to be inspected and the periphery thereof, that is, the hydraulic motor 29, the hydraulic motor 29 and the hydraulic pipe 30 (only part of which is shown in FIG. 5). ) Is visually observed, and the operator's hand or arm is inserted through the inspection opening 43 to re-tighten the connection or replace the seal. ..

  As shown in FIG. 5, the fastening portion 47 is provided with, for example, three female screw portions 49a at the opening edge portion of each inspection opening portion 43 as fixing seats, and the bolt member 51 as a fastening member is inspected for each inspection. Each inspection cover 45 is detachably fastened to the fan shroud 27 by being screwed into the female screw portion 49a through a through hole 45a provided in an edge portion of the cover 45. That is, in the normal state, the inspection opening 43 of the fan shroud 27 is closed by the inspection cover 45, and when the inspection cover 45 is removed, the required inspection work (including repair work) can be performed. In particular, the female screw portion 49a is a suspending tool 55 (corresponding to a tool: only partly shown by a chain double-dashed line in FIG. 5) attached to the tip of a lifting machine (not shown) that pulls out the cooling fan unit 25. ) And the cooling fan part 25 is required to be carried out, the female screw part 49a (fixed seat) of the inspection opening 43 is used as it is as a hanging part, and the cooling fan part 25 is pulled out (taken out). It is also a structure that can perform (work).

Next, the operation of the tire roller vehicle thus configured will be described.
Cooling of the traveling engine 15 is performed by transmitting the hydraulic pressure generated by the hydraulic pump 17 to the hydraulic motor 29 of the cooling fan unit 25.
That is, the hydraulic motor 29 is driven by hydraulic pressure, and the fan 31 is rotated. By the rotation of the fan 31, outside air is taken into the engine room 9 through the engine hood 13. Then, this outside air is guided as cooling air to the heat exchange section 19a of the radiator 19 through the fan shroud 27, and cools the cooling water flowing through the radiator 19. The cooling air that has passed through the radiator 19 is blown out to the outside through the duct portion 20.

Since the rotation speed of the hydraulic motor 29 is controlled according to the temperature of the cooling water, the cooling water can be efficiently cooled even by directly driving the traveling engine 15, that is, the traveling engine 15 can be efficiently cooled. Also, the noise of the cooling fan unit 25 is reduced.
Here, it is assumed that the driving engine 15 is stopped and the hydraulic motor 29 of the cooling fan unit 25 and its surroundings are inspected.

For inspection, the operator opens the engine hood 13 and opens the upper part of the engine room 9 (two-dot chain line in FIG. 1).
Here, the engine room 9 is surrounded by the water tanks 12a to 12c, and the inspection can be performed only from the upper part of the engine room 9 (restriction). Moreover, the hydraulic motor 29 that needs to be inspected is arranged inside the fan shroud 27 and is shielded from the outside.

At this time, an inspection window 41 is provided on the upper wall 28a of the fan shroud 27 that faces the upper portion (open side) of the engine room 9.
As a result, the worker removes the inspection cover 45 forming the inspection window 41 (two-dot chain line in FIG. 4) and opens the inspection opening 43. Then, a desired inspection can be performed by visually observing the condition inside the fan shroud 27, that is, the hydraulic motor 29 and its periphery through the inspection opening 43.

  When an oil leak is found by visual inspection, a repair tool is inserted from the opened inspection opening 43, and while visually checking from the inspection opening 43, the tightening work of the connection between the hydraulic motor 29 and the hydraulic pipe 30 and the sealing are performed. Exchange work may be performed.

Further, when it is necessary to carry out the cooling fan unit 25 by inspection, the work of releasing the connection between the radiator 19 and the fan shroud 27 through the inspection opening 43, the work of disconnecting the hydraulic motor 29 from the hydraulic pipe 30, and the like. After that, the lifting tool 55 of the lifting machine (not shown) is engaged with each female screw portion 49a (fixed seat) on the upper part of the fan shroud 27 from above the engine room 9.
After that, if it is hoisted by a hoisting machine (not shown), the entire cooling fan unit 25 is pulled out to the open side of the engine room 9 and carried out of the engine room 9. As a result, repair work that needs to be carried out can also be performed.

As described above, since the inspection window 41 is provided in the upper portion of the fan shroud 27 that surrounds the hydraulic motor 29 (the fan driving motor portion) facing the open side of the engine room 9, the inspection window 41 facilitates the inspection of the engine room. The hydraulic motor 29, which is a component inside the fan shroud 27, and its surroundings can be inspected from outside.
Therefore, even in the engine room 9 where the surroundings are surrounded by the water tanks 12a to 12c, the cooling fan unit 25 using the fan shroud 27 and the hydraulic motor 29 (fan driving motor) is used. It is possible to reduce noise of the cooling fan 25, improve the checkability of the cooling fan unit 25, and improve the cooling performance of the radiator 19 (heat exchanger). It is most suitable for the hydraulic motor 29, which has many occasions for inspection.

Moreover, the inspection window 41 has a simple structure because the inspection opening 43 formed in the fan shroud 27 is covered with the inspection cover 45 and the inspection cover 45 is fastened with the bolt member 51.
In addition, since the female screw portion 49a at the opening edge portion of the inspection opening portion 43 can be attached/detached to/from the suspending tool 55 of the lifting machine that carries out the cooling fan section 25, a suspending tool that engages with and disengages from the suspending tool 55 is separately provided. It is possible to carry out (draw out) the cooling fan unit 25 without providing it.

  It should be noted that the present invention is not limited to the above-described embodiment, and various modifications may be made without departing from the spirit of the present invention. For example, in one embodiment, the hydraulic motor is used as the fan driving motor, but the present invention is not limited to this, and an electric motor may be used. Further, in the embodiment, the cooling fan unit that sends the cooling air from the engine room to the radiator is used, but a cooling fan unit that sends the cooling air from the radiator to the engine room may be used. Needless to say, the present invention is not limited to the tire roller vehicle and can be applied to any rolling machine having an engine room surrounded by a water tank.

1 Car Body 9 Engine Room 12a-12c Water Tank 15 Running Engine 19 Radiator (Heat Exchanger)
25 Cooling Fan Section 27 Fan Shroud 29 Hydraulic Motor (Fan Drive Motor Section)
31 fan 41 inspection window 43 inspection opening 45 inspection cover 47 fastening portion 49a female screw portion (fixed seat)

Claims (1)

An engine room formed in the car body, the upper part of which is open and the surroundings are surrounded by a water tank that stores water for watering,
A running engine housed in the engine room,
A heat exchanger that is housed in the engine room adjacent to the running engine and cools the running engine;
A rolling compaction machine provided between the heat exchanger and the running engine, the cooling fan unit cooling the heat exchanger with cooling air,
The cooling fan unit,
A fan that generates cooling air,
A hydraulic motor for driving the fan,
A fan shroud that is provided so as to surround the fan and the hydraulic motor , and guides cooling air to a predetermined position;
An inspection window provided on an upper portion of the fan shroud facing the open side of the engine room, for inspecting the inside of the fan shroud ,
The cooling fan unit,
By combining the fan, the hydraulic motor, and the fan shroud into one part, it can be taken out from the open side of the engine room to the outside.
The inspection window is
An inspection opening provided on the upper wall of the fan shroud,
An inspection cover that closes the inspection opening,
A fastening portion for removably fastening the inspection cover to the fan shroud by screwing a fastening member into a fixed seat formed at an opening edge portion of the inspection opening portion.
Have
The fixed seat of the fastening portion is detachable from a tool for performing a work of taking out the cooling fan portion from the engine room .

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