Radiator

Abstract

To solve a problem that since a radiator for cooling an engine has a dust-proof net, a work for check to see whether or not the dust-proof net is clogged is necessary and if the dust-proof net is clogged, the dust-proof net is required to be detached from the radiator for cleaning and requires labor and time for maintenance, and thus to provide a radiator capable of facilitating maintenance work thereof.SOLUTION: A radiator with a dust-proof net 2 includes a detection device A for detecting clogging of the dust-proof net 2 due to mud, etc.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a radiator that is mounted on a work vehicle or the like. [Background technology]

[0002] A radiator that cools an engine is provided with a dustproof net (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-023317 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, it was necessary to check whether the dustproof net was clogged, and if it was clogged, it had to be removed from the radiator and cleaned, resulting in a lot of maintenance work.

[0005] The present invention has been made in view of the above, and has an object to provide a radiator that allows easy maintenance work. [Means for solving the problem]

[0006] The invention recited in claim 1 is a radiator provided with a dustproof net 2, and provided with a detection device A for detecting clogging of the dustproof net 2 with mud or the like.

[0007] The invention described in claim 2 is the radiator described in claim 1, in which the detection device A detects clogging of the dustproof net 2, and then activates the alarm device.

[0008] The invention as recited in claim 3 is the radiator as recited in claim 1, further comprising a rotation mechanism B for rotating the dustproof net 2.

[0009] The invention recited in claim 4 is the radiator recited in claim 1, further comprising a cleaning mechanism C for removing mud and the like adhering to the dustproof net 2. [Brief description of the drawings]

[0010] [Figure 1] FIG. 4 is a perspective view for explaining the operation of a dustproof net portion of the radiator according to the embodiment of the present invention. [Diagram 2] FIG. 4 is a side view for explaining the function of the dustproof net portion of the same. [Diagram 3] FIG. 4 is a side view for explaining the operation of the cleaning mechanism. [Figure 4] FIG. 4 is a side view for explaining the operation of the cleaning mechanism. [Diagram 5] FIG. 4 is a plan view for explaining the operation of the cleaning mechanism. [Figure 6] FIG. [Figure 7] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The following describes the engine cooling radiator that is installed in the riding rice transplanter of the present invention with reference to the drawings. The left and right directions of the riding rice transplanter when viewed from the forward direction are referred to as left and right, respectively, and the forward direction is referred to as front and the backward direction is referred to as rear.

[0012] As shown in FIG. 1, a dustproof net 2 is provided in front of a radiator 1 for cooling the engine, which is provided in front of the engine.

[0013] A support frame 3 that supports a dustproof net 2 is provided on the front side of the radiator 1.

[0014] The support frame 3 is attached to the front of the radiator 1 by inserting left and right support pins 1a, 1a provided on the top of the radiator 1 into left and right engagement holes 3a, 3a provided on the upper part, and fixing both ends of a support stay 5 connecting the left and right side walls 3L, 3R to the left and right front sides of the radiator 1 with bolts.

[0015] The support frame 3 is composed of trapezoidal left and right side walls 3L, 3R whose upper edge is longer than the lower edge, an upper wall 3U and a lower wall 3D having left and right engagement holes 3a, 3a, and a hole 3H is provided in the center to allow air to pass through the suction fan of the radiator 1.

[0016] The dustproof net 2 has a pivot shaft 2a at its lower part inserted into left and right holes 3b, 3b formed in the lower part of the left and right side walls 3L, 3R of the support frame 3, and its upper part is attached to the support frame 3 so as to be freely rotatable in the front-rear direction.

[0017] Left and right engagement pins 2b, 2b are provided on the left and right sides of the dustproof net 2 so as to protrude to the left and right, and are inserted into arc-shaped elongated holes 3c, 3c in the front-rear direction provided in the left and right side walls 3L, 3R of the support frame 3. The arc-shaped elongated holes 3c, 3c are arc-shaped with the left and right holes 3b, 3b as their centers.

[0018] Therefore, the dustproof net 2 can be rotated in the front-rear direction around the pivot shaft 2a provided at the lower part as the center of rotation within the range in which the left and right engagement pins 2b, 2b can move within the arc-shaped elongated holes 3c, 3c.

[0019] That is, the dustproof net 2 can be freely switched between a dustproof state in which it is closed facing the hole 3H through which the air drawn in by the suction fan of the radiator 1 of the support frame 3 passes, and a non-operating state in which it is open and inclined forward away from the hole 3H. The dustproof net 2 can be freely fixed to and released from the support frame 3 in the dustproof state.

[0020] In this embodiment, the pivot axis 2a provided at the bottom of the dustproof net 2, the left and right engagement pins 2b, 2b provided on the left and right sides, and the arc-shaped long holes 3c, 3c in the front-to-rear direction provided in the left and right side walls 3L, 3R of the support frame 3 through which the left and right engagement pins 2b, 2b are inserted constitute the rotation mechanism B.

[0021] A wind pressure sensor 4 is provided in front of the radiator 1 and behind the dustproof net 2 (between the radiator 1 and the dustproof net 2).

[0022] The wind pressure sensor 4 is pivotally supported at its upper end on a pivot point 4a at the left-right center position of the support stay 5 so that its lower portion can rotate freely in the front-rear direction.

[0023] As shown in Figures 1 and 2, the support stay 5 has a sensor mounting stay 6 that is U-shaped when viewed from the front fixed to the central position, which is cut out so that the height of the central part is lowered, and the upper end of the wind pressure sensor 4 is pivoted to the top of the sensor mounting stay 6 at a pivot point 4a consisting of a left-right pivot shaft so that the lower part can rotate freely in the front-rear direction.

[0024] A limit switch 7 is fixed to the support stay 5 at a position behind the wind pressure sensor 4.

[0025] Therefore, in the normal state where the dustproof net 2 is not clogged, the suction wind of the radiator 1 passes through the dustproof net 2 properly, causing the wind pressure sensor 4 to rotate rearward at the pivot point 4a at the upper end and press the limit switch 7, which turns ON.

[0026] Furthermore, in an abnormal state where mud adheres to and clogs the dustproof net 2, such as when the riding rice transplanter moves through deep parts of the tilled bed of a field, the suction wind from the radiator 1 does not pass through the dustproof net 2 properly, causing the wind pressure sensor 4 to rotate forward and hang down from the pivot point 4a at the upper end, separating it from the limit switch 7, which turns off the limit switch 7.

[0027] In this embodiment, the wind pressure sensor 4 and the limit switch 7 constitute a detection device A.

[0028] Furthermore, a temperature sensor is provided in the cooling water passage of the radiator 1 to detect when the cooling water becomes abnormally hot.

[0029] The operation panel of the riding rice transplanter's control section is equipped with a radiator high temperature abnormality warning lamp which lights up in response to an input from a temperature sensor which detects when the cooling water in the radiator 1 becomes abnormally hot, and a dustproof net clogging warning lamp which serves as an alarm device and lights up when the wind pressure sensor 4 moves away from the limit switch 7, causing the limit switch 7 to turn OFF, thereby detecting clogging of the dustproof net 2 (detection device A detects clogging of the dustproof net 2).

[0030] Therefore, the driver recognizes that the radiator 1 is abnormally hot when the radiator high temperature abnormality warning lamp comes on, and further, learns that the dustproof net 2 is clogged when the dustproof net clogging warning lamp comes on.

[0031] Therefore, by stopping the aircraft (the engine can be left running or stopped depending on the situation), opening the engine bonnet and releasing the dustproof net 2 from its attachment to the support frame 3, the dustproof net 2 is rotated from its dustproof operating state to its inactive state in which it is tilted forward and away from the hole 3H through which the air sucked in by the suction fan of the radiator 1 of the support frame 3 passes, and then pouring water from above on the back side (rear side) of the dustproof net 2, the mud adhering to the front side (front side) of the dustproof net 2 can be easily washed away.

[0032] Therefore, the dustproof net 2 can be easily cleaned by rotating it to an inoperative state in which it is inclined forward without removing the dustproof net 2, resulting in good workability and efficiency.

[0033] In addition, the support stay 5 for mounting the wind pressure sensor 4 is cut out so that the height of its central part is lowered, and the sensor mounting stay 6 is also U-shaped when viewed from the front, so that obstruction to the flow of air sucked in by the suction fan of the radiator 1 is minimized and the engine cooling performance of the radiator 1 is not impaired.

[0034] In addition, the electrical harness of the wind pressure sensor 4 is routed along the back side (rear side) of the support stay 5 and fixed with a clamp, and is protected by the support stay 5 to prevent breakage.

[0035] Next, with reference to Figures 3 to 5, an embodiment will be described in which a cleaning mechanism C is provided that rotates the dustproof net 2 from an automatically closed dustproof operating state to an open non-operating state inclined forward to automatically clean the dustproof net 2.

[0036] That is, the cleaning mechanism C is configured as follows.

[0037] A servo motor 10 is fixed to the outside of the left side wall 3L of the support frame 3, and the base of a sector gear 12 is fixed to a rotating shaft 11 that is rotatably provided between the left and right side walls 3L, 3R. The drive gear 10a of the servo motor 10 is engaged with the sector gear 12, and the servo motor 10 drives and rotates the rotating shaft 11 in forward and reverse directions.

[0038] Further, the air guide plate 13 and the base of a base link 14 are fixed to the pivot shaft 11, and one side of the air guide plate 13 and the base link 14 are fixed integrally.

[0039] A base of a cleaning body 16 having a brush 16a at its tip is fixed to a rotating shaft 15 fixed to the tip of the air guide plate 13 and the base link 14.

[0040] One end of the rotating shaft 15 is connected to a tip shaft 17 a of a net side link 17 which has its base fixed to a pivot shaft 2 a provided at the bottom of the dustproof net 2 and is fixed to one side of the bottom of the dustproof net 2 by a connecting link 18 .

[0041] Therefore, the servo motor 10 is stopped in a reference posture position in which the dustproof net 2 is in a closed dustproof state, the air guide plate 13 is in a horizontal state perpendicular to the dustproof net 2 in the closed dustproof state and guides wind toward the dustproof net 2, and the cleaning body 16 is in a horizontal state perpendicular to the dustproof net 2 in the closed dustproof state and the tip brush 16a is close to the front side (front side) of the dustproof net 2.

[0042] When mud D adheres to the surface (front) of the dustproof net 2 and the dustproof net 2 becomes clogged, the wind pressure sensor 4 moves away from the limit switch 7 as described above, and the limit switch 7 turns OFF.

[0043] Then, the control device operates the servo motor 10 in the forward direction, and moves from the above-mentioned reference position to a position facing downwards, with the dustproof net 2 tilted forward and in an open, inoperative state, and the air guide plate 13 being parallel to the open, inoperative dustproof net 2 and guiding the wind to flow downward along the surface of the dustproof net 2, so that the brush 16a at the tip of the cleaning body 16 operates to brush downwards the mud D adhering to the dustproof net 2.

[0044] Therefore, when mud D adheres to the surface (front side) of the dustproof net 2 and the dustproof net 2 becomes clogged and the wind pressure sensor 4 moves away from the limit switch 7 so that the limit switch 7 is turned OFF, the servo motor 10 operates in the forward direction, the dustproof net 2 tilts forward and enters an open, inoperative state, and the air guide plate 13 acts in parallel with the dustproof net 2 in the open, inoperative state to guide the wind downward along the surface of the dustproof net 2, causing the mud D to fall downward, and the brush 16a at the tip of the cleaning body 16 brushes the mud D adhered to the dustproof net 2 downward, thereby eliminating the clogging of the dustproof net 2.

[0045] Then, when the clogging of the dustproof net 2 is eliminated and the wind pressure sensor 4 presses the limit switch 7 so that the limit switch 7 turns ON, the control device operates the servo motor 10 in the reverse direction to return the dustproof net 2 to the reference position for the closed dustproof operation state.

[0046] When mud D adheres to the surface (front) of the dustproof net 2 and the dustproof net 2 becomes clogged, the wind pressure sensor 4 moves away from the limit switch 7 and the limit switch 7 turns OFF, the servo motor 10 may repeatedly operate in forward and reverse directions, causing the brush 16a at the tip of the cleaning body 16 to repeatedly brush the mud D adhered to the dustproof net 2 downward, thereby eliminating the clogging of the dustproof net 2.

[0047] As the servo motor 10 repeats forward and reverse rotation, a timer detects the time since the limit switch 7 turned OFF and a clog was detected, and if the limit switch does not turn ON and the clog is not cleared even when the timer time exceeds a specified time (specified number of seconds), the control device determines that the clog cannot be cleared and displays a lamp or monitor display on the operation panel indicating that the clog cannot be cleared, or issues a warning such as a buzzer or audio alarm.

[0048] In another embodiment, when the engine is stopped to replenish seedlings during rice planting work, etc., if the wind pressure sensor 4 moves away from the limit switch 7, causing the limit switch 7 to turn OFF and detecting clogging of the dustproof net 2, the suction fan of the radiator 1 may be rotated in the reverse direction to blow away and drop the mud adhering to the surface (front) of the dustproof net 2.

[0049] In order to give priority to engine cooling by the radiator 1, the suction fan is rotated in the forward direction for a predetermined period of time after the engine is stopped, and then, after the temperature sensor detects that the cooling water in the radiator 1 has dropped to a predetermined temperature, the suction fan of the radiator 1 is rotated in the reverse direction to blow away and remove mud adhering to the front side (front side) of the dustproof net 2.

[0050] 6 and 7 are a side view and a front view illustrating the configuration of the shroud 20 of the radiator 1. FIG.

[0051] That is, a shroud 20 for attaching a radiator fan 21 to the radiator 1 is fixed to the rear side (engine side) of the radiator 1.

[0052] The shroud 20 is made of sheet metal and is box-shaped with a circular air intake 20a in the center through which a radiator fan 21 draws in air. The periphery of the front opening is folded outward to provide a bent portion 20b that comes into contact with the radiator 1 to improve airtightness, and the bent portion 20b is brought into contact with the rear surface of the radiator 1 and fixed with bolts.

[0053] The radiator fan 21 is in contact with the rear surface of the shroud 20 and is fixed by tightening bolts into nuts 20c provided around the air intake port 20a on the rear surface of the shroud 20.

[0054] In particular, a guide plate 20d having an inverted V shape when viewed from the front is provided at the bottom inside the shroud 20, and cutout holes 20e are provided at the left and right bottom sides.

[0055] Conventionally, dust and muddy water could accumulate inside the shroud 20 from the radiator 1 side due to the wind sucked in by the radiator fan 21. However, in this embodiment, the dust and muddy water is guided to the left and right bottom sides by an inverted V-shaped guide plate 20d provided at the bottom inside the shroud 20, and is discharged through the cutout holes 20e in the left and right bottom sides. [Explanation of symbols]

[0056] 2 Dustproof net A. Detection device B Rotation mechanism C Cleaning mechanism

Claims

1. A radiator provided with a dustproof net (2), characterized in that a detection device (A) is provided for detecting clogging of the dustproof net (2) with mud or the like.

2. 2. The radiator according to claim 1, wherein an alarm device is activated when the detector detects clogging of the dustproof net.

3. 2. The radiator according to claim 1, further comprising a rotating mechanism (B) for rotating the dustproof net (2).

4. 2. The radiator according to claim 1, further comprising a cleaning mechanism (C) for removing mud and the like adhering to the dustproof net (2).

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