Harvester

Abstract

The harvester is provided with a first cooling device (21) arranged on the outer side of the machine body in the left-right direction relative to the radiator (20), and a first supporting frame (28) supporting the first cooling device (21). The first support frame (28) is configured so as to be capable of swinging, opening and closing, about a first swinging axis (Z2), between a first closed position at which the first cooling device (21) is in a posture when in use and a first open position at which the first cooling device (21) is in a posture of opening toward the outside in the left-right direction of the machine body. The harvester is provided with a first locking mechanism (35) which can be switched between a first locking state and a first releasing state, wherein the first locking state limits swinging of the first supporting frame (28) from the first opening position to the first closing position side, and the first releasing state does not limit swinging of the first supporting frame (28). When the first support frame (28) is in the first open position, the first lock mechanism (35) switches from the first release state to the first lock state.

Description

Technical Field

[0001] The present invention relates to a harvester. Background Art

[0002] Conventionally, as a harvester, for example, a harvester described in Patent Document 1 is known. The harvester described in Patent Document 1 has: a water-cooled engine (referred to as "engine (16)" in the document); a radiator (referred to as "radiator (17)" in the document), which is disposed outside the engine in the left-right direction of the machine body and cools the cooling water for the engine; a first cooling device (referred to as "oil cooler (60)" in the document), which is disposed outside the radiator in the left-right direction of the machine body; and a first support frame (referred to as "frames (61), (62)" in the document), which supports the first cooling device.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2021-65150 (JP2021-65150A) Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] In the harvester described in Patent Document 1, when performing maintenance on the radiator, it is necessary to remove the first cooling device from the first support frame, and there is room for improvement in terms of easily performing maintenance on the radiator.

[0008] In view of the above situation, a harvester capable of easily performing maintenance on the radiator is desired.

[0009] Means for Solving the Problems

[0010] The harvester of the present invention is characterized in that it has: a water-cooled engine; a radiator disposed outside the engine in the left-right direction of the machine body to cool the cooling water for the engine; a first cooling device disposed outside the radiator in the left-right direction of the machine body; and a first support frame for supporting the first cooling device; the first support frame is configured to be able to swing open and close between a first closed position where the first cooling device is in a posture during use and a first open position where the first cooling device is in a posture of being opened outward in the left-right direction of the machine body with a first swing axis as the center, the harvester has a first locking mechanism, the first locking mechanism can be switched to a first locked state that restricts the first support frame from swinging from the first open position to the first closed position side and a first released state that does not restrict the swinging of the first support frame, and when the first support frame is located at the first open position, the first locking mechanism is switched from the first released state to the first locked state.

[0011] According to this characteristic structure, when the first support frame is swung with the first swing axis as the center and the position is changed to the first open position, the side surface (lateral outer surface) on the outer side in the left-right direction of the machine body in the radiator is released. Thus, when maintaining the radiator, it is possible to easily approach the lateral outer surface of the radiator from the outer side in the left-right direction of the machine body. That is, a harvester that can easily perform radiator maintenance can be realized.

[0012] In addition, when the first support frame is located at the first open position, the first locking mechanism automatically switches from the first released state to the first locked state. Thus, in the state where the first support frame is located at the first open position, the first support frame will not accidentally swing to the first closed position side. In addition, only by performing the operation of making the first support frame located at the first open position, it is possible to easily switch the first locking mechanism from the first released state to the first locked state.

[0013] Furthermore, in the present invention, it is preferable that the first locking mechanism is provided at a portion of the first support frame located on the side of the first swing axis.

[0014] According to this characteristic structure, at a portion of the first support frame located on the side of the first swing axis, the first locking mechanism restricts the first support frame from swinging from the first open position to the first closed position side. Thus, it is possible to reliably restrict the first support frame from swinging from the first open position to the first closed position side.

[0015] In addition, in the present invention, preferably, the first locking mechanism includes: a first locking pin that can move in the direction along the first swing axis; and a first restricting portion provided on the first support frame to restrict the movement of the first locking pin. As the first support frame swings toward the first open position side, the restriction of the movement of the first locking pin by the first restricting portion is released, whereby the first locking pin moves to restrict the swing of the first support frame from the first open position toward the first closed position side.

[0016] According to this characteristic structure, the first locking mechanism can be simply constituted by the first locking pin and the first restricting portion.

[0017] In addition, in the present invention, preferably, the harvester includes: a second cooling device arranged outside the first cooling device in the left-right direction of the machine body; and a second support frame that supports the second cooling device. The second support frame is configured to be able to swing open and close between a second closed position where the second cooling device is in a posture during use and a second open position where the second cooling device is in a posture of being opened to the outside in the left-right direction of the machine body with the second swing axis as the center. The harvester has a second locking mechanism that can be switched between a second locked state that restricts the swing of the second support frame from the second open position toward the second closed position side and a second released state that does not restrict the swing of the second support frame. When the second support frame is located at the second open position, the second locking mechanism is switched from the second released state to the second locked state.

[0018] According to this characteristic structure, when the second support frame is swung with the second swing axis as the center and its position is changed to the second open position, the side surface (lateral outer surface) on the outer side in the left-right direction of the machine body of the first cooling device is released. Thus, when maintaining the first cooling device, it is possible to easily approach the lateral outer surface of the first cooling device from the outer side in the left-right direction of the machine body.

[0019] In addition, when the second support frame is located at the second open position, the second locking mechanism automatically switches from the second released state to the second locked state. Thus, in a state where the second support frame is located at the second open position, the second support frame will not accidentally swing toward the second closed position side. In addition, by simply performing an operation to make the second support frame located at the second open position, it is possible to easily switch the second locking mechanism from the second released state to the second locked state.

[0020] In addition, in the present invention, preferably, the second locking mechanism is provided on a portion of the second support frame located on the side of the second swing axis.

[0021] According to this characteristic structure, in the part of the second support frame on the second swing axis side, the second locking mechanism restricts the swing of the second support frame from the second open position toward the second closed position side. Thereby, the swing of the second support frame from the second open position toward the second closed position side can be reliably restricted.

[0022] In addition, in the present invention, preferably, the second locking mechanism has: a second locking pin that can move in the direction along the second swing axis; and a second restricting portion provided on the second support frame that restricts the movement of the second locking pin. As the second support frame swings toward the second open position side, the restriction of the movement of the second locking pin by the second restricting portion is released, and thereby the second locking pin moves to restrict the swing of the second support frame from the second open position toward the second closed position side.

[0023] According to this characteristic structure, the second locking mechanism can be simply constituted by the second locking pin and the second restricting portion.

[0024] In addition, in the present invention, preferably, the harvester has: a third cooling device arranged on the outer side in the left - right direction of the machine body with respect to the second cooling device; and a third support frame that supports the third cooling device. The third support frame is configured to be able to swing open and close between a third closed position where the third cooling device assumes a posture during use and a third open position where the third cooling device assumes a posture of being opened to the outer side in the left - right direction of the machine body with the third swing axis as the center. The harvester has a third locking mechanism that can be switched to a third locked state that restricts the swing of the third support frame from the third open position toward the third closed position side and a third released state that does not restrict the swing of the third support frame. When the third support frame is in the third open position, the third locking mechanism is switched from the third released state to the third locked state.

[0025] According to this characteristic structure, when the third support frame swings with the third swing axis as the center and changes its position to the third open position, the outer side surface (lateral outer surface) in the left - right direction of the machine body of the second cooling device is released. Thereby, when performing maintenance on the second cooling device, it is possible to easily approach the lateral outer surface of the second cooling device from the outer side in the left - right direction of the machine body.

[0026] In addition, when the third support frame is in the third open position, the third locking mechanism automatically switches from the third released state to the third locked state. Thus, in the state where the third support frame is in the third open position, the third support frame will not accidentally swing toward the third closed position side. In addition, by simply operating to place the third support frame in the third open position, the third locking mechanism can be easily switched from the third released state to the third locked state.

[0027] Furthermore, in the present invention, preferably, the third locking mechanism is provided at a portion of the third support frame on the side of the third swing axis.

[0028] According to this characteristic structure, at a portion of the third support frame on the side of the third swing axis, the third locking mechanism restricts the swing of the third support frame from the third open position toward the third closed position side. Thus, the swing of the third support frame from the third open position toward the third closed position side can be reliably restricted.

[0029] Furthermore, in the present invention, preferably, the third locking mechanism includes: a third locking pin that can move in a direction along the third swing axis; and a third restricting portion provided on the third support frame that restricts the movement of the third locking pin. As the third support frame swings toward the third open position side, the restriction of the movement of the third locking pin by the third restricting portion is released, and thus the third locking pin moves to restrict the swing of the third support frame from the third open position toward the third closed position side.

[0030] According to this characteristic structure, the third locking mechanism can be simply constituted by the third locking pin and the third restricting portion.

[0031] Furthermore, in the present invention, preferably, the first cooling device, the second cooling device, and the third cooling device are arranged to overlap each other in a side view. By changing the position of the third support frame to the third open position, the position of the second support frame can be changed to the second open position, and by changing the position of the second support frame to the second open position, the position of the first support frame can be changed to the first open position.

[0032] According to this characteristic structure, the first cooling device, the second cooling device, and the third cooling device can be arranged compactly. In addition, by changing the position of the third support frame to the third open position, the position of the second support frame can be changed to the second open position without the second cooling device interfering with the third cooling device, and by changing the position of the second support frame to the second open position, the position of the first support frame can be changed to the first open position without the first cooling device interfering with the second cooling device.

[0033] In addition, in the present invention, preferably, the second support frame and the third support frame are configured to swing in mutually different directions to open and close, and the first support frame is configured to swing in the same direction as the third support frame to open and close.

[0034] According to this characteristic structure, among the first support frame, the second support frame, and the third support frame, the support frames adjacent in the left-right direction of the machine body swing in mutually different directions to open and close. Thus, when the first support frame, the second support frame, and the third support frame are swung to open and close, it is possible to prevent them from interfering with each other.

[0035] In addition, in the present invention, preferably, there is a spacing maintaining member that maintains the spacing between the first support frame and the third support frame at a prescribed spacing.

[0036] According to this characteristic structure, the spacing between the first support frame and the third support frame is maintained at a prescribed spacing by the spacing maintaining member. Thus, it is possible to prevent the first cooling device and the third cooling device from coming into contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a right view showing a combine harvester.

[0038] Figure 2 is a top view showing a combine harvester.

[0039] Figure 3 is a right view showing the interior of the engine room and the air filter room in a state where the dust cover is opened.

[0040] Figure 4 is a top view showing the power unit.

[0041] Figure 5 is a right view showing the cooling system unit.

[0042] Figure 6 is a right view showing a state where the first oil cooler is supported by the first support frame.

[0043] Figure 7 is a right view showing a state where the condenser and the fuel cooler are supported by the second support frame.

[0044] Figure 8 is a right view showing a state where the second oil cooler is supported by the third support frame.

[0045] Figure 9 is a top view showing a state where the position of the third support frame is changed to the open position.

[0046] Figure 10It is a top view showing the state where the positions of the second support frame and the third support frame are changed to the open position.

[0047] Figure 11 It is a top view showing the state where the positions of the first support frame, the second support frame, and the third support frame are changed to the open position.

[0048] Figure 12 It is a top view showing the spacer maintaining member of another embodiment. Detailed implementation mode

[0049] The embodiments for implementing the present invention will be described based on the drawings. In addition, in the following description, the direction of arrow F is set as the "front side of the machine body", the direction of arrow B is set as the "rear side of the machine body", the direction of arrow L is set as the "left side of the machine body", and the direction of arrow R is set as the "right side of the machine body".

[0050] 〔Overall structure of the combine harvester〕

[0051] In Figure 1 and Figure 2 a semi-feed combine harvester (equivalent to the "harvester" of the present invention) is shown. This combine harvester has a traveling machine body 1, a cutting unit 2, a threshing device 3, a grain storage tank 4, a grain discharging device 5, a cockpit 6, a power unit 7, and a speed change unit 8.

[0052] The traveling machine body 1 has left and right crawler traveling devices 9 and a machine body frame 10. The machine body frame 10 is supported by the left and right crawler traveling devices 9. A fuel tank (not shown) is provided at the rear of the machine body frame 10. The cutting unit 2 is disposed in front of the traveling machine body 1. The cutting unit 2 is configured to cut standing cereal straws.

[0053] The threshing device 3 is configured to thresh the cut cereal straws. The grain storage tank 4 is arranged horizontally (adjacent to the right side in this embodiment) to the threshing device 3. The grain storage tank 4 is configured to store grains. The grain discharging device 5 is configured to discharge the grains in the grain storage tank 4.

[0054] The cockpit 6 is disposed at a position biased to one side (the right side in this embodiment) of the left and right of the traveling machine body 1. The cockpit 6 has a driving part 11 for the driver to ride on and a cabin part 12 covering the driving part 11. The driving part 11 has a driver's seat 13. An air conditioning unit (not shown) for air-conditioning the inside of the cockpit 6 is provided. The air conditioning unit is, for example, accommodated at the top of the cabin part 12.

[0055] An engine room 14 is formed below the driver's seat 13. The engine room 14 houses the power unit 7. An air filter room 15 is formed behind the driver's seat 13. An air filter 16 for the engine E is accommodated in the air filter room 15.

[0056] A dust-proof cover 17 is provided to cover the engine room 14 and the air filter chamber 15 from the outside in the left-right direction of the machine body (the right side in this embodiment; the same applies hereinafter). The dust-proof cover 17 is configured to cover the engine room 14 and the air filter chamber 15 from the outside in the left-right direction of the machine body in a state that allows ventilation and blocks the passage of dust. The dust-proof cover 17 is configured to be swingably opened and closed about a swing axis Z1 extending in the vertical direction.

[0057] The power unit 7 includes a water-cooled engine E, an exhaust gas purification device 18, a cooling system unit U, and a cooling fan 19. The exhaust gas purification device 18 is configured to purify the exhaust gas of the engine E using a DPF (Diesel Particulate Filter). The cooling system unit U is disposed outside the engine E in the left-right direction of the machine body. The cooling system unit U includes a radiator 20, a first oil cooler 21 (corresponding to the "first cooling device" of the present invention), a condenser 22 (corresponding to the "second cooling device" of the present invention), a second oil cooler 23 (corresponding to the "third cooling device" of the present invention), and a fuel cooler 24.

[0058] The cooling fan 19 is disposed between the engine E and the radiator 20 in the left-right direction of the machine body. The cooling fan 19 is configured to supply cooling air to the cooling system unit U. The cooling fan 19 is configured to be able to switch between a normal rotation state in which air outside the machine flows into the engine room 14 through the dust-proof cover 17 and a reverse rotation state in which the air in the engine room 14 flows out to the outside of the machine through the dust-proof cover 17.

[0059] The transmission unit 8 is disposed between the front parts of the left crawler traveling device 9 and the right crawler traveling device 9. The transmission unit 8 is configured to shift the power from the engine E and transmit it to the left and right crawler traveling devices 9 and the cutting unit 2. The transmission unit 8 includes an HST (Hydro Static Transmission) as a main transmission device, a gear-type transmission mechanism as a sub-transmission device, and a gearbox that houses the gear-type transmission mechanism. The cutting unit 2 is configured to transmit the power shifted by the HST. The left and right crawler traveling devices 9 are configured to transmit the power shifted by the HST and the gear-type transmission mechanism.

[0060] [Cooling System Unit]

[0061] As Figures 3 to 5As shown, the radiator 20 is configured to cool the cooling water for the engine E. The radiator 20 is disposed outside the engine E in the left-right direction of the machine body. A shroud 25 that covers the cooling fan 19 is supported at the left side portion of the radiator 20. The radiator 20 is supported by a radiator frame 26. A radiator duct 27 that serves as a passage for the air flowing by the cooling fan 19 is supported at the right side portion of the radiator frame 26.

[0062] The first oil cooler 21 is configured to cool the oil (working oil) for the HST. The first oil cooler 21 is disposed outside the radiator 20 in the left-right direction of the machine body. Specifically, the first oil cooler 21 is disposed at an adjacent position on the right side of the radiator 20. The first oil cooler 21 is disposed inside the radiator duct 27. The first oil cooler 21 is supported by a first support frame 28.

[0063] Connected to the first oil cooler 21 are a tubular first introduction member 29A that introduces the working oil into the first oil cooler 21 and a tubular first discharge member 29B that discharges the working oil from the first oil cooler 21. The first introduction member 29A and the first discharge member 29B are formed of a flexible tubular member. The first introduction member 29A is connected to the lower portion of the front edge portion of the first oil cooler 21. The first discharge member 29B is connected to the upper portion of the front edge portion of the first oil cooler 21.

[0064] The condenser 22 is configured to cool the refrigerant for the air conditioning unit. The condenser 22 is disposed outside the radiator 20 in the left-right direction of the machine body. Specifically, the condenser 22 is disposed at an adjacent position on the right side of the first oil cooler 21. The condenser 22 is disposed inside the radiator duct 27. The condenser 22 is supported by a second support frame 30.

[0065] Connected to the condenser 22 are a tubular second introduction member 31A that introduces the refrigerant into the condenser 22 and a tubular second discharge member 31B that discharges the refrigerant from the condenser 22. The second introduction member 31A and the second discharge member 31B are formed of a flexible tubular member. The second discharge member 31A is connected to the lower portion of the rear edge portion of the condenser 22. The second discharge member 31B is connected to the upper portion of the rear edge portion of the condenser 22.

[0066] The second oil cooler 23 is configured to cool the oil (lubricating oil) for the transmission. The second oil cooler 23 is disposed outside the radiator 20 in the left-right direction of the machine body. Specifically, the second oil cooler 23 is disposed at an adjacent position on the right side of the condenser 22. The second oil cooler 23 is disposed outside the radiator duct 27. The second oil cooler 23 is supported by a third support frame 32.

[0067] Connected to the second oil cooler 23 are a tubular third introduction member 33A for introducing the lubricating oil into the second oil cooler 23 and a tubular third discharge member 33B for discharging the lubricating oil from the second oil cooler 23. The third introduction member 33A and the third discharge member 33B are constituted by flexible tubular members. The third introduction member 33A is connected to the lower part of the leading edge portion of the second oil cooler 23. The third discharge member 33B is connected to the upper part of the leading edge portion of the second oil cooler 23.

[0068] The fuel cooler 24 is configured to cool the fuel. The fuel cooler 24 is disposed outside the radiator 20 in the left - right direction of the machine body. Specifically, the fuel cooler 24 is disposed on the right side and below the condenser 22. In other words, the fuel cooler 24 is disposed below the second oil cooler 23 in a state of overlapping the second oil cooler 23 when viewed from above. The fuel cooler 24 is disposed outside the radiator pipe 27. The fuel cooler 24 is supported by the second support frame 30.

[0069] Connected to the fuel cooler 24 are a tubular fourth introduction member 34A for introducing fuel into the fuel cooler 24 and a tubular fourth discharge member 34B for discharging fuel from the fuel cooler 24. The fourth introduction member 34A and the fourth discharge member 34B are constituted by flexible tubular members. The fourth introduction member 34A is connected to the rear part of the upper edge portion of the fuel cooler 24. The fourth discharge member 34B is connected to the front part of the upper edge portion of the fuel cooler 24.

[0070] The first oil cooler 21, the condenser 22, and the second oil cooler 23 are arranged in sequence outside the machine body in the left - right direction while overlapping each other when viewed in side view. The first oil cooler 21 and the condenser 22 are arranged in a state where the condenser 22 is outside the first oil cooler 21 in the left - right direction of the machine body and they overlap each other when viewed in side view. The condenser 22 and the second oil cooler 23 are arranged in a state where the second oil cooler 23 is outside the condenser 22 in the left - right direction of the machine body and they overlap each other when viewed in side view. The first oil cooler 21 and the fuel cooler 24 are arranged in a state where the fuel cooler 24 is outside the first oil cooler 21 in the left - right direction of the machine body and they overlap each other when viewed in side view.

[0071] 〔Support structure for the cooling system unit〕

[0072] As Figure 6 shown, the radiator frame 26 has a frame - shaped frame body 26A, a front longitudinal frame 26B, a middle longitudinal frame 26C, and a rear longitudinal frame 26D. The front longitudinal frame 26B, the middle longitudinal frame 26C, and the rear longitudinal frame 26D are respectively provided across the upper and lower parts of the frame body 26A.

[0073] The first support frame 28 can be swingably supported by the radiator frame 26 (front longitudinal frame 26B) via upper and lower first hinges 28a centered on a first swing axis Z2 extending in the vertical direction. The first support frame 28 is configured to be able to swing open and close between a closed position (refer to Figure 6 ) where the first oil cooler 21 assumes an in-use posture and an open position (refer to Figure 11 ) where the first oil cooler 21 assumes a posture of being opened outward in the left-right direction of the body. A first locking mechanism 35 is provided, and this first locking mechanism 35 can be switched between a locked state that restricts the swing of the first support frame 28 from the open position toward the closed position side and a released state that does not restrict the swing of the first support frame 28. Details will be described later.

[0074] The first oil cooler 21 is detachably fixed to the first support frame 28 and the middle longitudinal frame 26C by bolts B1. That is, the first support frame 28 is fixed in a state of being located at the closed position by detachable bolts B1 (specifically, the bolts B1 that fix the first oil cooler 21 to the middle longitudinal frame 26C). Upper and lower fixing portions 21a that are fixed to the first support frame 28 by bolts B1 are provided at the front edge portion of the first oil cooler 21. Upper and lower fixing portions 21a that are fixed to the middle longitudinal frame 26C by bolts B1 are provided at the rear edge portion of the first oil cooler 21.

[0075] The upper and lower first hinges 28a support the first oil cooler 21 via the first support frame 28 so as to be swingable about the first swing axis Z2. The first hinge 28a is bolt-fixed to the front longitudinal frame 26B. The first lead-out member 29B extends along the first swing axis Z2 on the side (front side in this embodiment) where the first hinge 28a is located with respect to the first oil cooler 21.

[0076] As Figure 7 shown, the second support frame 30 can be swingably supported by the radiator frame 26 (rear longitudinal frame 26D) via upper and lower second hinges 30a centered on a second swing axis Z3 extending in the vertical direction. The second support frame 30 is configured to be able to swing open and close between a closed position (refer to Figure 7 ) where the condenser 22 and the fuel cooler 24 assume in-use postures and an open position (refer to Figure 10 ) where the condenser 22 and the fuel cooler 24 assume postures of being opened outward in the left-right direction of the body. Details will be described later, but a second locking mechanism 36 is provided, and this second locking mechanism 36 can be switched between a locked state that restricts the swing of the second support frame 30 from the open position toward the closed position side and a released state that does not restrict the swing of the second support frame 30.

[0077] The condenser 22 is detachably fixed to the second support frame 30 by bolts B2. The fuel cooler 24 is detachably fixed to the second support frame 30 by bolts B3. At the front edge portion of the condenser 22, upper and lower fixing portions 22a fixed to the second support frame 30 by bolts B2 are provided. At the rear edge portion of the condenser 22, upper and lower fixing portions 22a fixed to the second support frame 30 by bolts B3 are provided. At the upper edge portion of the fuel cooler 24, front and rear fixing portions 24a fixed to the second support frame 30 by bolts B3 are provided. At the lower edge portion of the fuel cooler 24, front and rear fixing portions 24a fixed to the second support frame 30 by bolts B3 are provided.

[0078] At the upper part of the front edge portion of the second support frame 30, a fixing portion 30b fixed to the first support frame 28 by bolts B4 is provided. That is, the second support frame 30 is fixed by detachable bolts B4 in a state of being located at the closed position.

[0079] The upper and lower second hinges 30a support the condenser 22 and the fuel cooler 24 via the second support frame 30 so as to be swingable about the second swing axis Z3. The second hinge 30a is bolt-fixed to the rear longitudinal frame 26D. The second introduction member 31A and the second discharge member 31B extend along the second swing axis Z3 on the side where the second hinge 30a is located (the rear side in the present embodiment) with respect to the condenser 22. The fourth introduction member 34A and the fourth discharge member 34B extend along the second swing axis Z3 on the side where the second hinge 30a is located (the rear side in the present embodiment) with respect to the fuel cooler 24.

[0080] As Figure 8 shown, the third support frame 32 is supported by the radiator frame 26 (front longitudinal frame 26B) via a third hinge 32a so as to be swingable about a third swing axis Z4 extending in the vertical direction. The third support frame 32 is configured to be swingable between a closed position (refer to Figure 8 ) where the second oil cooler 23 is in a posture during use and an open position (refer to Figure 9 ) where the second oil cooler 23 is opened outward in the left-right direction of the machine body about the third swing axis Z4. A third locking mechanism 37 is provided, and the third locking mechanism 37 can be switched between a locked state that restricts the swing of the third support frame 32 from the open position to the closed position side and a released state that does not restrict the swing of the third support frame 32. Details will be described later.

[0081] The second oil cooler 23 is detachably fixed to the third support frame 32 and the second support frame 30 by bolts B5. That is, the third support frame 32 is fixed in a state of being located at the closed position by the detachable bolts B5 (specifically, the bolts B5 that fix the second oil cooler 23 to the second support frame 30). A fixing portion 23a fixed to the second support frame 32 by bolts B5 is provided at the front edge portion of the second oil cooler 23. A fixing portion 23a fixed to the second support frame 30 by bolts B5 is provided at the rear edge portion of the second oil cooler 23.

[0082] The third hinge 32a supports the second oil cooler 23 via the third support frame 32 so as to be swingable about the third swing axis Z4. The third hinge 32a is bolted to a portion between the upper first hinge 28a and the lower first hinge 28a in the front longitudinal frame 26B. The third introduction member 33A and the third lead-out member 33B extend along the third swing axis Z4 on the side where the third hinge 32a is located (the front side in the present embodiment) with respect to the second oil cooler 23.

[0083] As Figure 4 shown, the first support frame 28 is positioned at the closed position by the rear fixing portion 21a abutting against the middle longitudinal frame 26C from the right side. That is, the first support frame 28 is configured to abut against the radiator frame 26 and be positioned at the closed position.

[0084] The second support frame 30 is positioned at the closed position by the fixing portion 30b abutting against the first support frame 28 from the right side. That is, the second support frame 30 is configured to abut against the first support frame 28 and be positioned at the closed position.

[0085] The third support frame 32 is positioned at the closed position by the rear fixing portion 23a abutting against the second support frame 30 from the right side. That is, the third support frame 32 is configured to abut against the second support frame 30 and be positioned at the closed position.

[0086] [First locking mechanism]

[0087] As Figure 4 and Figure 6 shown, the first locking mechanism 35 is provided at a portion of the first support frame 28 on the side of the first swing axis Z2. The first locking mechanism 35 has a first locking pin 38, a first spring 39, and a first restricting portion 40.

[0088] The first locking pin 38 is supported by the front longitudinal frame 26B via the first brace 41. The first locking pin 38 is supported by the first brace 41 so as to be movable in the direction along the first swing axis Z2. The first locking pin 38 is urged downward by the first spring 39.

[0089] The first restricting portion 40 is configured to restrict the movement of the first locking pin 38. The first restricting portion 40 is provided at the upper end portion of the portion of the first support frame 28 on the first swing axis Z2 side. In a state where the first support frame 28 is in the closed position, the lower end of the first locking pin 38 abuts against the upper surface of the first restricting portion 40 from above. Thus, the downward movement of the first locking pin 38 is restricted by the first restricting portion 40. That is, the first locking mechanism 35 is in a released state.

[0090] 〔Second locking mechanism〕

[0091] As Figure 4 and Figure 7 shown, the second locking mechanism 36 is provided at the portion of the second support frame 30 on the second swing axis Z3 side. The second locking mechanism 36 includes a second locking pin 42, a second spring 43, and a second restricting portion 44.

[0092] The second locking pin 42 is supported by the rear longitudinal frame 26D via the second brace 45. The second locking pin 42 is supported by the second brace 45 so as to be movable in the direction along the second swing axis Z3. The second locking pin 42 is urged downward by the second spring 43.

[0093] The second restricting portion 44 is configured to restrict the movement of the second locking pin 42. The second restricting portion 44 is provided at the upper end portion of the portion of the second support frame 30 on the second swing axis Z3 side. In a state where the second support frame 30 is in the closed position, the lower end of the second locking pin 42 abuts against the upper surface of the second restricting portion 44 from above. Thus, the downward movement of the second locking pin 42 is restricted by the second restricting portion 44. That is, the second locking mechanism 36 is in a released state.

[0094] 〔Third locking mechanism〕

[0095] As Figure 4 and Figure 8 shown, the third locking mechanism 37 is provided at the portion of the third support frame 32 on the third swing axis Z4 side. The third locking mechanism 37 includes a third locking pin 46, a third spring 47, and a third restricting portion 48.

[0096] The third locking pin 46 is supported by the front longitudinal frame 26B via the third brace 49. The third locking pin 46 is supported by the third brace 49 so as to be movable in the direction along the third swing axis Z4. The third locking pin 46 is urged downward by the third spring 47.

[0097] The third restricting portion 48 is configured to restrict the movement of the third locking pin 46. The third restricting portion 48 is provided at the upper end portion of the portion of the third support frame 32 on the side of the third swing axis Z4. In a state where the third support frame 32 is in the closed position, the lower end of the third locking pin 46 abuts against the upper surface of the third restricting portion 48 from above. Thus, the downward movement of the third locking pin 46 is restricted by the third restricting portion 48. That is, the third locking mechanism 37 is in a released state.

[0098] 〔Opening and closing methods of the first support frame, the second support frame, and the third support frame〕

[0099] Next, based on Figures 9 to 11 the opening and closing methods of the first support frame 28, the second support frame 30, and the third support frame 32 will be described.

[0100] First, as Figure 9 shown, the bolt B5 that fixes the second oil cooler 23 (the rear fixing portion 23a) to the second support frame 30 is removed from the second support frame 30. Thereby, the fixing of the third support frame 32 to the closed position is released. And by swinging the third support frame 32 forward about the third swing axis Z4, the position of the third support frame 32 can be changed to the open position. That is, the third support frame 32 is configured to swing forward about the third swing axis Z4 and change its position to the open position.

[0101] Among them, as the third support frame 32 swings toward the open position side, the restriction of the movement of the third locking pin 46 by the third restricting portion 48 is released. That is, as the third support frame 32 swings toward the open position side, the abutment of the lower end of the third locking pin 46 against the upper surface of the third restricting portion 48 is disengaged. And when the third support frame 32 is in the open position, the restriction of the movement of the third locking pin 46 by the third restricting portion 48 is released, whereby the third locking pin 46 moves downward. That is, when the third support frame 32 is in the open position, the third locking mechanism 37 is switched from the released state to the locked state. Thus, even if the third support frame 32 wants to swing toward the closed position side about the third swing axis Z4, the third support frame 32 will contact the third locking pin 46 and prevent this swing. In this way, as the third support frame 32 swings toward the open position side, the restriction of the downward movement of the third locking pin 46 by the third restricting portion 48 is released, whereby the third locking pin 46 moves downward to restrict the swing of the third support frame 32 from the open position toward the closed position side.

[0102] Next, as Figure 10As shown, remove the bolt B4 that fixes the second support frame 30 (fixed portion 30b) to the first support frame 28 from the first support frame 28. Thereby, the fixing of the second support frame 30 to the closed position is released. And by swinging the second support frame 30 backward about the second swing axis Z3, the position of the second support frame 30 can be changed to the open position. That is, the second support frame 30 is configured to swing backward about the second swing axis Z3 and change its position to the open position.

[0103] In this way, by changing the position of the third support frame 32 to the open position, the position of the second support frame 30 can be changed to the open position. The second support frame 30 and the third support frame 32 are configured to swing in mutually different directions to open and close.

[0104] Among them, as the second support frame 30 swings toward the open position side, the restriction of the movement of the second locking pin 42 by the second restricting portion 44 is released. That is, as the second support frame 30 swings toward the open position side, the contact between the lower end of the second locking pin 42 and the upper surface of the second restricting portion 44 is disengaged. And when the second support frame 30 is in the open position, the restriction of the movement of the second locking pin 42 by the second restricting portion 44 is released, whereby the second locking pin 42 moves downward. That is, when the second support frame 30 is in the open position, the second locking mechanism 36 is switched from the released state to the locked state. Thereby, even if the second support frame 30 wants to swing toward the closed position side about the second swing axis Z3, the second restricting portion 44 will contact the second locking pin 42 and prevent this swing. In this way, as the second support frame 30 swings toward the open position side, the restriction of the downward movement of the second locking pin 42 by the second restricting portion 44 is released, whereby the second locking pin 42 moves downward to restrict the swing of the second support frame 30 from the open position to the closed position side.

[0105] Next, as Figure 11 shown, remove the two bolts B1 that fix the first oil cooler 21 (upper and lower fixing portions 21a at the rear side) to the middle longitudinal frame 26C from the middle longitudinal frame 26C. Thereby, the fixing of the first support frame 28 to the closed position is released. And by swinging the first support frame 28 forward about the first swing axis Z2, the position of the first support frame 28 can be changed to the open position. That is, the first support frame 28 is configured to swing forward about the first swing axis Z2 and change its position to the open position.

[0106] In this way, by changing the position of the second support frame 30 to the open position, the position of the first support frame 28 can be changed to the open position. The first support frame 28 is configured to swing in the same direction as the third support frame 32 to open and close.

[0107] Among them, as the first support frame 28 swings toward the open position side, the restriction of the movement of the first locking pin 38 by the first restricting portion 40 is released. That is, as the first support frame 28 swings toward the open position side, the contact between the lower end of the first locking pin 38 and the upper surface of the first restricting portion 40 is disengaged. And when the first support frame 28 is in the open position, the restriction of the movement of the first locking pin 38 by the first restricting portion 40 is released, whereby the first locking pin 38 moves downward. That is, when the first support frame 28 is in the open position, the first locking mechanism 35 is switched from the released state to the locked state. Thus, even if the first support frame 28 attempts to swing toward the closed position side about the first swing axis Z2, the first restricting portion 40 contacts the first locking pin 38 to prevent such swinging. In this way, as the first support frame 28 swings toward the open position side, the restriction of the downward movement of the first locking pin 38 by the first restricting portion 40 is released, whereby the first locking pin 38 moves downward to restrict the swinging of the first support frame 28 from the open position toward the closed position side.

[0108] 〔Other Embodiment〕

[0109] (1) In the above embodiment, the "first cooling device" of the present invention is the first oil cooler 21. However, the "first cooling device" of the present invention is not limited to the first oil cooler 21. That is, the "first cooling device" of the present invention may also be a cooling device other than the first oil cooler 21.

[0110] (2) In the above embodiment, the first locking mechanism 35 includes a first locking pin 38, a first spring 39, and a first restricting portion 40. However, the first locking mechanism 35 is not limited to the structure described in the above embodiment. For example, the first locking mechanism 35 may not include the first spring 39.

[0111] (3) In the above embodiment, the "second cooling device" of the present invention is the condenser 22. However, the "second cooling device" of the present invention is not limited to the condenser 22. That is, the "second cooling device" of the present invention may also be a cooling device other than the condenser 22.

[0112] (4) In the above embodiment, the second locking mechanism 36 includes a second locking pin 42, a second spring 43, and a second restricting portion 44. However, the second locking mechanism 36 is not limited to the structure described in the above embodiment. For example, the second locking mechanism 36 may not include the second spring 43.

[0113] (5) In the above embodiment, the "third cooling device" of the present invention is the second oil cooler 23. However, the "third cooling device" of the present invention is not limited to the device related to the second oil cooler 23. That is, the "third cooling device" of the present invention may also be a cooling device other than the second oil cooler 23.

[0114] (6) In the above-described embodiment, the third locking mechanism 37 includes a third locking pin 46, a third spring 47, and a third restricting portion 48. However, the third locking mechanism 37 is not limited to the structure according to the above-described embodiment. For example, the third locking mechanism 37 may not include the third spring 47.

[0115] (7) In the above-described embodiment, the first swing axis Z2, the second swing axis Z3, and the third swing axis Z4 are axes extending in the vertical direction. However, the first swing axis Z2, the second swing axis Z3, and the third swing axis Z4 may also be axes extending in the front-rear direction of the machine body.

[0116] (8) In the above-described embodiment, the second support frame 30 and the third support frame 32 are configured to swing in different directions to open and close. However, the second support frame 30 and the third support frame 32 may also be configured to swing in the same direction as each other to open and close.

[0117] (9) In the above-described embodiment, the first support frame 28 is configured to swing in the same direction as the third support frame 32 to open and close. However, the first support frame 28 may also be configured to swing in a direction different from that of the third support frame 32 to open and close.

[0118] (10) As Figure 12 shown, in the above-described embodiment, a gap maintaining member 50 may be provided to maintain a prescribed gap between the first support frame 28 and the third support frame 32. The gap maintaining member 50 is provided on the first support frame 28. However, the gap maintaining member 50 may also be provided on the third support frame 32. When the first support frame 28 swings from the closed position toward the open position side, the gap maintaining member 50 presses the third support frame 32, thereby maintaining a prescribed gap between the first support frame 28 and the third support frame 32.

[0119] Industrial Applicability

[0120] The present invention can be applied not only to semi-feed combine harvesters but also to full-feed combine harvesters and corn harvesters.

[0121] Explanation of Reference Numerals:

[0122] 20 Radiator

[0123] 21 First oil cooler (first cooling device)

[0124] 22 Condenser (second cooling device)

[0125] 23 Second oil cooler (third cooling device)

[0126] 28 First support frame

[0127] 30 Second support frame

[0128] 32 Third support frame

[0129] 35 First locking mechanism

[0130] 36 Second locking mechanism

[0131] 37 Third locking mechanism

[0132] 38 First locking pin

[0133] 40 First restricting part

[0134] 42 Second locking pin

[0135] 44 Second restricting part

[0136] 46 Third locking pin

[0137] 48 Third restricting part

[0138] 50 Spacing maintaining member

[0139] E Engine

[0140] Z2 First swing axis

[0141] Z3 Second swing axis

[0142] Z4 Third swing axis

Claims

1. A harvester, wherein, it has: a water-cooled engine; a radiator, which is arranged outside the engine in the left-right direction of the machine body and cools the cooling water for the engine; a first cooling device, which is arranged outside the radiator in the left-right direction of the machine body; and a first support frame, which supports the first cooling device; the first support frame is configured to be able to swing open and close between a first closed position where the first cooling device is in a posture during use and a first open position where the first cooling device is in a posture of being opened to the outside in the left-right direction of the machine body with a first swing axis as the center, the harvester has a first locking mechanism, and the first locking mechanism can be switched to a first locked state that restricts the first support frame from swinging to the first closed position side from the first open position and a first released state that does not restrict the swinging of the first support frame, when the first support frame is in the first open position, the first locking mechanism is switched from the first released state to the first locked state.

2. The harvester according to claim 1, wherein, the first locking mechanism is arranged at a part of the first support frame on the side of the first swing axis.

3. The harvester according to claim 2, wherein, the first locking mechanism has: a first locking pin that can move in a direction along the first swing axis; and a first restricting portion arranged on the first support frame to restrict the movement of the first locking pin, as the first support frame swings to the first open position side, the restriction of the movement of the first locking pin by the first restricting portion is released, and thus the first locking pin moves to restrict the first support frame from swinging to the first closed position side from the first open position.

4. The harvester according to any one of claims 1 to 3, wherein, it has: a second cooling device, which is arranged outside the first cooling device in the left-right direction of the machine body; and a second support frame, which supports the second cooling device, the second support frame is configured to be able to swing open and close between a second closed position where the second cooling device is in a posture during use and a second open position where the second cooling device is in a posture of being opened to the outside in the left-right direction of the machine body with a second swing axis as the center, the harvester has a second locking mechanism, and the second locking mechanism can be switched to a second locked state that restricts the second support frame from swinging to the second closed position side from the second open position and a second released state that does not restrict the swinging of the second support frame, when the second support frame is in the second open position, the second locking mechanism is switched from the second released state to the second locked state.

5. The harvester according to claim 4, wherein, the second locking mechanism is arranged at a part of the second support frame on the side of the second swing axis.

6. The harvester according to claim 5, wherein, The second locking mechanism has: a second locking pin that can move in the direction along the second swing axis; and a second restricting portion that is provided on the second support frame and restricts the movement of the second locking pin. As the second support frame swings toward the second open position side, the restriction of the movement of the second locking pin by the second restricting portion is released, whereby the second locking pin moves to restrict the swing of the second support frame from the second open position toward the second closed position side.

7. The combine harvester according to any one of claims 4 to 6, wherein, it has: a third cooling device that is arranged outside the second cooling device in the left-right direction of the machine body; and a third support frame that supports the third cooling device, the third support frame is configured to be swingably opened and closed between a third closed position where the third cooling device assumes a posture during use and a third open position where the third cooling device is opened toward the outside in the left-right direction of the machine body with the third swing axis as the center. The combine harvester has a third locking mechanism that can be switched to a third locked state in which the swing of the third support frame from the third open position toward the third closed position side is restricted and a third released state in which the swing of the third support frame is not restricted. When the third support frame is in the third open position, the third locking mechanism is switched from the third released state to the third locked state.

8. The combine harvester according to claim 7, wherein, the third locking mechanism is provided at a portion of the third support frame on the side of the third swing axis.

9. The combine harvester according to claim 8, wherein, the third locking mechanism has: a third locking pin that can move in the direction along the third swing axis; and a third restricting portion that is provided on the third support frame and restricts the movement of the third locking pin. As the third support frame swings toward the third open position side, the restriction of the movement of the third locking pin by the third restricting portion is released, whereby the third locking pin moves to restrict the swing of the third support frame from the third open position toward the third closed position side.

10. The combine harvester according to any one of claims 7 to 9, wherein, the first cooling device, the second cooling device, and the third cooling device are arranged to overlap each other when viewed from the side. By changing the position of the third support frame to the third open position, the position of the second support frame can be changed to the second open position, and by changing the position of the second support frame to the second open position, the position of the first support frame can be changed to the first open position.

11. The combine harvester according to claim 10, wherein, the second support frame and the third support frame are configured to swing in mutually different directions to open and close. The first support frame is configured to swing in the same direction as the third support frame to open and close.

12. The combine harvester according to claim 11, wherein, There is a spacing maintaining member that maintains the spacing between the first support frame and the third support frame at a prescribed spacing.

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