JPH082416Y2 - Oil cooler mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention mainly arranges an oil cooler in the front part of a radiator installed for a vehicle, and cools the cooling air of the radiator and the oil cooler by a cooling fan to the outside of the engine hood. Regarding the cooling device of the type that sucks in from above, regarding the mounting structure of the oil cooler in which the upper end of the oil cooler is inclined toward the radiator side from the lower end, even if the area of the cooling air intake port provided in the engine hood is increased, the fin front surface of the radiator The present invention relates to an oil cooler mounting structure capable of easily cleaning dust attached to the oil cooler and improving the cooling efficiency of the oil cooler.

(Prior Art) Conventionally, a cooling device in a hydraulic excavator or the like has an oil cooler for working oil of a working machine arranged in front of a radiator for engine cooling water, and is cooled by a cooling wind sucked from above the outside of an engine hood by a cooling fan. After cooling the oil cooler, the radiator was cooled and discharged outside the vehicle. Since the ventilation resistance of the radiator fins in such a cooling device is greater than that of the oil cooler, dust mixed in the cooling air easily adheres to the fin front surface of the radiator after passing through the fins of the oil cooler. Therefore, in order to improve the cooling efficiency of the radiator, dust adhering to the front surface of the fin is regularly cleaned. Description will be given with reference to FIG. 3 showing a schematic side sectional view of the cooling device. Attach the radiator 32 for engine cooling water in the engine hood 31,
A space L1 sufficient to easily clean dust attached to the radiator front surface 32a is provided in front of it, the oil cooler 33 is fixed, and the cooling fan 35 driven by the engine 34 sucks in the cooling air intake port 31a. After cooling the oil cooler 33 with the cooling air P, the radiator 32 was cooled and discharged to the outside of the engine hood 31. Also,
In addition, as shown in FIG. 4 which shows a schematic top sectional view of the cooling device, a radiator 42 for engine cooling water is mounted in an engine room 47, and a relatively small space is provided in front of it.
There is also an example in which L5 is provided and one side portion of the oil cooler 43 is pivotally supported by the hinge 46 on one side surface of the engine room.
In this cooling device, a cooling fan 45 driven by an engine 44 cools an oil cooler 43 with a cooling air Q sucked from a cooling air intake 41a, then cools a radiator 42 and discharges the engine hood 41 to the outside. . Since the oil cooler 43 can be opened like a virtual line in the cooling device, the dust attached to the radiator front surface 42a can be easily cleaned even if the space L5 between the radiator 42 and the oil cooler 43 is reduced. .

(Problems to be Solved by the Invention) In the prior art shown in FIG. 3, since the installation dimension L2 of the cooling air inlet 31a is reduced, the oil cooler of the type in which the oil cooler 33 or the radiator 32 is removed for cleaning As shown by the phantom line, the cooling air intake 31 when the space between the radiators 32 is close to L3
Compared to the installation dimension L4 of a, it had a drawback that it was considerably smaller and the suction resistance of the cooling air increased. Further, in the prior art shown in FIG. 4, when cleaning dust adhering to the radiator front surface 42a, the oil cooler 43 may be opened forward as shown by an imaginary line. In order to clean the dust adhering to 42a, it is necessary to open the oil cooler 43 widely, which requires an extra space, and there is a drawback that the rubber pipe for the oil cooler 43 becomes large.

(Means for Solving the Problems) The present invention has been made to solve the problems in the above-mentioned conventional techniques, and an oil cooler mounting structure according to the first invention is used for engine cooling water in an engine hood. In a cooling device in which an oil cooler is arranged in front of the radiator and the cooling air of the radiator and the oil cooler is sucked in by a cooling fan in front of the oil cooler and from above the outside of the engine hood, Swing support means that are provided at predetermined intervals and are capable of tilting the oil cooler around its lower end, and this swing support means moves the upper end of the oil cooler from its vertical position to the upper end side of the radiator. Angled mounting position and the opening of the oil cooler with the upper end of the oil cooler tilted from its vertical position in the opposite direction from the upper end of the radiator. An oil cooler mounting structure according to a second aspect of the present invention is the oil cooler mounting structure according to the first aspect of the present invention, when the oil cooler is at the mounting position. , Upper sealing means to prevent leakage of the cooling air flow between the upper ends of the oil cooler and the radiator, and when the oil cooler is in the mounting position,
It is installed between the lower ends of the oil cooler and the radiator to prevent leakage of the cooling air flow, and when the oil cooler is in the open position, a removable lower part that can be removed from between the lower ends of the oil cooler and the radiator. It is characterized by comprising a sealing means.

(Operation) In the case of the above configuration, the mounting structure of the oil cooler according to the first invention is provided at a position spaced a predetermined distance forward from the lower end of the radiator, and the oil cooler can be tilted around the lower end thereof. At the mounting position where the upper end of the oil cooler is tilted by a predetermined angle from the vertical position to the upper end of the radiator by the swing support means, the front surface of the oil cooler is aligned with the flow direction of the cooling air sucked from above the outside of the engine hood. Since it is almost vertical, the resistance of the cooling air passing through the oil cooler is reduced, and since the upper end of the oil cooler is close to the radiator, it is possible to use a large cooling air intake port and to cool the cooling air intake port. Wind inhalation resistance is reduced.

Further, in the open position where the upper end of the oil cooler is inclined from the vertical position in a direction opposite to the upper end of the radiator by a predetermined angle, the swing support means is provided at a position spaced a predetermined distance forward from the lower end of the radiator. In addition, since the upper end of the oil cooler is tilted from its vertical position by a predetermined angle in the direction opposite to the upper end of the radiator, the gap between the radiator and the oil cooler is widened, and dust that adheres to the front of the fins of the radiator is opened. When cleaning, dust is not clogged between the lower ends of the oil cooler and the radiator, and the dust can be easily discharged downward, and the front surface of the radiator and the rear surface of the oil cooler can be easily cleaned.

An oil cooler mounting structure according to a second aspect of the invention is the same as the oil cooler mounting structure according to the first aspect, but when the oil cooler is at the mounting position, an upper seal means is provided between the upper ends of the oil cooler and the radiator. Also, the lower sealing means mounted between the lower ends of the oil cooler and the radiator can prevent the leakage of each cooling air flow and greatly improve the cooling efficiency.

When the oil cooler is in the open position, a wide open space is formed vertically between the oil cooler and the radiator, and if the removable lower sealing means is removed from between the lower ends of the oil cooler and the radiator. The dust that has cleaned the front surface of the radiator and the rear surface of the oil cooler can be easily discharged downward.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a diagram showing a cooling device for a hydraulic excavator,
(A) is a side sectional view, (B) is a front sectional view, and (C) is an upper sectional view. FIG. 2 is an enlarged view of part P of FIG. 1 (A).
In FIG. 1, an oil cooler 3 for working oil of a working machine is arranged in front of a radiator 2 for engine cooling water installed in an engine hood 1, and a transmission 12 is provided by an engine 4.
The cooling air A is sucked from the cooling air intake port 1a above the outside of the engine hood 1 by the cooling fan 5 driven via. The cooling air A cools the oil cooler 3, then cools the radiator 2, and is discharged to the outside of the engine hood 1. Since the ventilation resistance of the radiator fins in such a cooling device is larger than that of the oil cooler 3, dust mixed in the cooling air easily adheres to the fin front surface portion 2c of the radiator 2 after passing through the fins of the oil cooler 3. In order to improve the cooling efficiency of the radiator 2, it is necessary to regularly clean dust adhering to the fin front surface portion 2c. The lower end 3a of the oil cooler 3 is pivotally supported on both sides by a hinge 7 on a bracket 6 fixed to the engine room 21, and the upper end 3b of the oil cooler 3 is inclined from the lower end 3a toward the radiator 2 by a predetermined amount. In this state, it is fixed to the bracket 14 fixed to the engine room 21 with bolts or the like. Lower end of the oil cooler 3
Between the lower end 3a of the oil cooler 3 and the lower end 2a of the radiator 2 between the hinges 7 and 7 attached to both sides of 3a,
It is fixed to a cover 15 pivotally supported in the engine room 21 by a hinge 9 and sealed by a sealing device 8. As shown in FIG. 2, the sealing device 8 is provided with a leaf spring type locking device 10 so that the lower end portion 3a of the oil cooler 3 and the lower end portion 2a of the radiator 2 are sealed so that the cover 15 is rotated upward. Held in. Also, the leaf spring type locking device
Reference numeral 10 denotes a locking piece 1 fixed to a cover 15 in a recess of a leaf spring 10a fixed to a bracket 13 fixed to an engine room 21.
It is configured to lock the bulge of 0b. The upper end 3b of the oil cooler 3 is also the upper end 3b of the oil cooler 3.
A sealing device 11 attached to the radiator seals between the upper end portions 2b of the radiator 2. A pipe block 16 is fixed to an engine room 21 in the vicinity of the side of the oil cooler 3, and the working oil discharged from an operating valve for a working machine (not shown) is passed through a pipe 17, a pipe block 16 and a pipe 18 to It is supplied to the lower part of the oil cooler 3, and the oil cooler 3
After cooling with, pipe 19 from the upper part, piping block 16,
It is returned to an oil tank (not shown) through the pipe 20. The operation of the above configuration will be described. Oil cooler 3 upper end
Even if the oil cooler 3 and the radiator 2 are installed close to each other, the space between the lower end portion 3a of the oil cooler 3 and the lower end portion 2a of the radiator 2 is arranged so that the oil cooler 3 and the radiator 2 are installed closer to each other than the lower end 3a. Can be taken large. Therefore, when cleaning dust adhering to the fin front surface 2c of the radiator 2, the handle 15a is held and the sealing device 8 is opened downward to a position indicated by an imaginary line, so that the lower end portion 3a of the oil cooler 3 and the radiator 2 are opened. The dust can be discharged downward without being clogged between the lower ends 2a. At the same time, the upper end 3b of the oil cooler 3 becomes the upper end 2b of the radiator 2.
Since it is close to the cooling air intake port 1a, it is possible to reduce the intake resistance of the cooling air.
Further, since the front surface portion 3c of the oil cooler 3 is substantially perpendicular to the direction of the cooling air A sucked from above the outside of the engine hood 1, the cooling efficiency of the oil cooler 3 can be improved. Further, the lower end 3a of the oil cooler 3 has hinges 7,7.
Since it is pivotally supported on the bracket 6 by
When the fixing to 14 is released, it can be tilted forward to the position shown by the phantom line to widen the space between the upper end 3b of the oil cooler 3 and the upper end 2b of the radiator 2, so that it is attached to the fin front surface 2c of the radiator 2. Dust becomes easier to clean. Even if the oil cooler 3 tilts to the position shown by the phantom line in this way, the hydraulic oil piping to the oil cooler 3 is a piping block.
Piping because it is fixed to the engine room 21 at 16 parts
Since the 18 and the pipe 19 only slightly move to the position shown by the imaginary line, the space in front of the oil cooler 3 can be made compact. Similarly, pipe block 16
Is fixed to the engine hood 1, so that the pipe 17 and the pipe 20 do not interfere with other parts, so that they can be arranged compactly. When cooling the oil cooler 3 and the radiator 2, a seal device 8 is provided between the lower end portion 3a of the oil cooler 3 and the lower end portion 2a of the radiator 2, and a seal device 11 is provided between the upper end portion 3b of the oil cooler 3 and the upper end portion 2b of the radiator 2. Sealed, cooling air A is oil cooler 3
Since the oil is not bypassed, the cooling efficiency of the oil cooler 3 can be improved.

(Effects of the Invention) As described in detail above, according to the present invention, the following effects can be obtained.

(1) At the mounting position where the upper end of the oil cooler is inclined from the vertical position to the upper end side of the radiator by a predetermined angle, the upper end of the oil cooler is close to the radiator, so a large cooling air intake port may be adopted. Since it is possible to reduce the suction resistance of the cooling air, it is possible to improve the cooling efficiency.

(2) Further, at such a mounting position, the front surface of the oil cooler is substantially perpendicular to the flow direction of the cooling air sucked from above the outside of the engine hood, which also improves the cooling efficiency of the oil cooler. it can.

(3) In the open position where the upper end of the oil cooler is inclined from the vertical position in the direction opposite to the upper end of the radiator by a predetermined angle, the distance between the upper ends of the oil cooler and the radiator becomes wide, and dust that adheres to the front surface of the fins of the radiator is widened. Makes cleaning work easier.

(4) Further, even if the oil cooler and the radiator are installed close to each other in such an open position, since the upper end of the oil cooler is attached so as to be inclined toward the radiator side from the lower end, each of the lower ends of the oil cooler and the radiator is attached. Since the space between the parts is large, the dust adhering to the front surface of the cleaned radiator can be easily discharged downward without being clogged.

(5) In the mounting structure of the oil cooler according to the first aspect, when the oil cooler is at the mounting position, the upper sealing means and the lower sealing means can prevent the leakage of the cooling air flow and greatly improve the cooling efficiency.

(6) In the mounting structure of the oil cooler according to claim 1, when the oil cooler is in the open position, a wide open space is formed between the oil cooler and the radiator, and the lower seal means is removed for cleaning. Since dust can be easily discharged downward, cleaning work can be significantly facilitated.

[Brief description of drawings]

FIG. 1 is a diagram showing a cooling device installed in an engine hood of a hydraulic excavator, where (A) is a side sectional view, (B) is a front sectional view, and (C) is a top sectional view. FIG. 2 is an enlarged view of part P in FIG. 1, and FIGS. 3 and 4 are views showing a conventional technique. 1 …… Engine hood 1a …… Cooling air inlet 2 …… Radiator 2a …… Radiator lower end 2b …… Radiator upper end 2c …… Fin front part 3 …… Oil cooler 3a …… Oil cooler lower end 3b …… Oil Cooler upper end 3c …… front part 4 …… engine 5 …… seal device 6 …… bracket 7 …… hinge 8 …… seal device 9 …… hinge 10 …… leaf spring type locking device 10a …… leaf spring 10b… … Locking piece 11 …… Seal device 12 …… Transmission device 13,14 …… Bracket 15 …… Cover 15a …… Grip 16 …… Piping block 17 to 20 …… Piping

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-305293 (JP, A) Actual Open Sho 58-59924 (JP, U) Actual Open Sho 64-36522 (JP, U) Actual Public Sho-64- 7056 (JP, Y2)

Claims (2)

[Scope of utility model registration request] 1. An oil cooler is arranged in front of a radiator for engine cooling water in an engine hood, and cooling air of the radiator and the oil cooler is sucked by a cooling fan in front of the oil cooler and from above the outside of the engine hood. In a cooling device of this type, a swing support means is provided at a position spaced forward from the lower end of the radiator by a predetermined distance, and the oil cooler can be tilted about the lower end thereof. The mounting position with the upper end inclined from the vertical position toward the upper end of the radiator by a predetermined angle, and the open position with the upper end of the oil cooler inclined from the vertical position toward the upper end of the radiator by a predetermined angle. An oil cooler mounting structure that is composed of a tiltable oil cooler. 2. An oil cooler mounting structure according to claim 1, wherein when the oil cooler is at the mounting position, upper sealing means for preventing leakage of cooling air flow between the upper ends of the oil cooler and the radiator, When the oil cooler is in the mounting position, it is installed between the lower ends of the oil cooler and the radiator to prevent leakage of the cooling air flow, and when the oil cooler is in the open position, the lower ends of the oil cooler and the radiator are An oil cooler mounting structure comprising a removable lower sealing means that can be removed from between.