TW201912006A - Combine harvester - Google Patents

Abstract

The present invention provides a combined harvester capable of promoting the workability and maintainability related to a urea water bin. The combined harvester is provided with: a grain tank (8) used to store the grain granules obtained by threshing via a threshing device (6); a grain granule-discharging device (9) used to discharge the grain granules stored in the grain tank (8); and a waste gas purifying device provided with a urea selective catalytic reduction (SCR) catalytic converter. The urea SCR catalytic converter uses the ammonia produced from the urea water to carry out a reduction reaction with the waste gas generated by an engine (11), so as to perform a purifying treatment. A grain elevating portion (9a) of the grain granule-discharging device (9) is disposed at the rear side of the grain tank (8). The combined harvester is provided with an urea water bin (20) storing urea water supplied for the urea SCR catalytic converter. Moreover, the combined harvester is provided with a cover body (91) which can be opened or closed freely. The cover body (91) integrally covers a water supplying port (21) of the urea water bin (20) and the grain elevating portion (9a).

Description

Combine harvester

The invention relates to a combine harvester.

In order to adapt to the exhaust gas regulation that has been intensified in recent years, there are combine harvesters provided with an exhaust gas purification device that purifies the exhaust gas of the engine.

In addition, the exhaust gas purification device includes a structure including urea selective catalysis in which ammonia generated from an aqueous urea solution (hereinafter referred to as "urea water") reacts with nitrogen oxides in the exhaust gas to perform purification treatment. Reduction (Selective Catalytic Reduction: SCR) catalyst.

When the exhaust gas purification device is configured to have a urea SCR catalyst, a urea water tank that stores urea water to be supplied to the urea SCR catalyst is appropriately provided.

As the installation place of the urea water tank, for example, there is a structure in which a space between an inclined bottom wall included in the bottom of the grain tank and the body frame is disposed at the rear of the body (for example, refer to Patent Document 1).

Patent Document 1: Japanese Patent Application Publication No. 2016-42850

However, in the conventional combine as described above, there is room for further improvement regarding the water supply operation to the urea water tank and the maintainability of the urea water tank.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a combine harvester capable of improving workability and maintainability related to a urea water tank.

To solve the above problems, the present invention adopts the following technical solutions.

The invention described in claim 1 is a combine harvester, which is provided with a grain box 8 that stores the grains obtained by threshing device 6 and a grain discharge device 9 that is stored in the grain box The grain exhaust of 8; and an exhaust gas purifying device having a urea SCR catalyst for purifying the exhaust gas of the engine 11 by using ammonia generated from urea water, and the combine is characterized in that the grain The grain lifting device 9a of the grain discharge device 9 is disposed on the rear side of the grain tank 8. The combine harvester is provided with a urea water tank 20 that stores urea water supplied to the urea SCR catalyst, and is provided with a freely openable and closable A cover body 91 which integrally covers the water supply port 21 of the urea water tank 20 and the valley portion 9a.

In the invention according to claim 2, according to the combine of claim 1, the water supply port 21 is arranged to face the rear of the machine body, and the water supply port 21 is arranged on a rear side of the grain box 8. The front side.

In the invention according to claim 3, the combine harvester according to claim 1 or 2 is configured such that a load can be provided on the rear side of the water supply port 21 in a state where the cover 91 is opened.台 95。 Taiwan 95.

In the invention according to claim 4, according to the combine of claim 3, a lower portion of the grain box 8 has an inclined bottom wall 81, and a storage space 93 formed below the inclined bottom wall 81 The urea water tank 20 and the water supply port 21 are arranged.

In the invention according to claim 5, according to the combine of claim 4, the urea water tank 20 is supported on one side of the grain tank 8, and the grain tank 8 is supported so as to be able to face the outside of the machine body about the longitudinal axis. Rotating, a plurality of hoses 300 are arranged along the rear side of the grain tank 8 and communicate with the urea water tank 20.

According to the invention described in claim 1, if the cover 91 covering the valley portion 9a of the discharge auger 9 is opened, the water supply port 21 of the urea water tank 20 is exposed, so that the operation of supplying the urea water is easy. In addition, since the water supply port 21 of the urea water tank 20 can be covered by the cover 91 covering the valley portion 9a, it is possible to reduce the accumulation of dust such as straw shavings at the water supply port 21 and its peripheral portion.

According to the invention described in claim 2, in addition to the effects of the invention described in claim 1, the water supply port 21 of the urea water tank 20 is located closer to the front side than the rear side 82 of the grain tank 8, so that, for example, straw shavings can be reduced. In the case of a lid or the like deposited on the water supply port 21.

According to the invention described in claim 3, in addition to the effects of the invention described in claim 1 or 2, in a state where the cover 91 covering the valley portion 9a is opened, a bearing platform 95 is provided on the rear side of the water supply port 21. Therefore, it is possible to easily perform the water supply operation from the water supply port 21 by using the carrier 95.

According to the invention described in claim 4, in addition to the effects of the invention described in claim 3, the capacity of the grain tank 8 can be secured, and at the same time, the space in which the urea water tank 20 is arranged can be secured.

According to the invention described in claim 5, in addition to the effects of the invention described in claim 4, the hose 300 is arranged along the rear side of the grain tank 8, so that even when the grain tank 8 is rotated about the longitudinal axis, The movement of the hose 300 can be minimized, and problems such as damage to the hose 300 can be reduced.

An embodiment of the combine of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the gist of the present invention. In addition, the constituent elements in the following embodiments include content that can be easily replaced by those skilled in the art, or substantially the same content, so-called equivalent range content.

FIG. 1 is a right side view of the combine of the embodiment, FIG. 2 is a right side view showing a state where a cover covering a rear portion of the combine is opened, and FIG. 3 is a rear view of the combine, and FIG. 4 is a plan view of the combine. In the following description, the front-rear direction, the left-right direction, and the up-down direction in the normal use state of the combine 1 will be described as the front-rear direction, left-right direction, and up-down direction of each part, respectively.

Here, “front” is the traveling direction of the combine 1 during the harvesting operation, and “rear” is the opposite direction of the front. "Left" is the left-hand direction when facing forward, and "Right" is the opposite direction to the left. In addition, "below" is the direction in which gravity acts, and "above" is the opposite direction of the downward direction. In addition, these directions are defined for easy understanding and explanation, and the present invention is not limited by these directions. In addition, hereinafter, the “machine body” is sometimes referred to as the combine 1.

<Overall Structure of Combine Harvester 1>

First, the overall structure of the combine 1 will be briefly described. As shown in FIG. 1, FIG. 2, FIG. 3, and FIG. 4, the combine harvester 1 includes a body frame 2, a traveling device 3 provided below the body frame 2, an upper portion of the body frame 2, and a front of the body frame 2. Various operating devices, and a cab 7 provided on the upper front side of the body frame 2. In addition, various operating levers and measuring instruments are provided in the cab 7.

The traveling device 3 includes a pair of left and right track 3a that transmits power from an engine 11 provided on the body frame 2 and makes revolutions. The traveling device 3 travels the body by rotating the crawler 3a. The crawler belt 3a is formed in an annular shape from an elastic body such as rubber. In addition, the traveling device 3 includes a drive wheel 3b that rotates the crawler belt 3a and a tensioner 3c that applies tension to the crawler belt 3a in the front-rear direction of the machine body.

The various working devices include, for example, a harvesting device 4 provided in front of the body frame 2; a threshing device 6 provided on the upper left side of the body frame 2; a grain bin 8 provided on the upper right side of the body frame 2; And a grain discharge auger (a grain discharge device having a grain raising section 9a and a conveying section 9b) 9 which is arranged above the threshing device 6 and the grain box 8 and discharges the grain stored in the grain box 8. In addition, as a working device, a grain rod conveying device (not shown) is further provided on the left side of the cab 7 on the body frame 2.

Then, the grain rod is harvested by the harvesting device 4, the grain rod conveying device 5 is used to transport the harvested grain rod toward the threshing device 6, and the grains obtained by threshing and sorting by the threshing device 6 are stored in the grain box 8 in. The grain discharge auger 9 discharges the grain stored in the grain tank 8 to the outside of the body. The grain discharge auger 9 includes a raised valley portion 9a which is erected (uprightly installed) behind the grain box 8; a conveying portion 9b which communicates with the raised valley portion 9a and extends forward; 9c is connected to the front end of the conveyance part 9b.

The harvesting device 4 includes a grass-dividing rod 4a that divides the grain rods in the field, a lifting device 4b that lifts the divided cereal rods, and a cutter that cuts the root of the lifted grain rods. In the harvesting device 4, the grain rods planted in the field are divided by the grass dividing rods 4a, the grain rods of the divided grass are lifted by the lifting device 4b, and the lifted grain rods are harvested by the cutter. In addition, the harvested grain rod is conveyed toward the threshing device 6 by the grain rod conveying device 5.

The grains that have been sorted by the sorting unit after being threshed by the threshing device 6 are sent to the grain tank 8 by a grain lifting device. The grains stored in the grain tank 8 are fed to the grains provided behind the grain tank 8 (behind the body frame 2) and discharged from the valley portion 9a of the auger 9. The fed grain is conveyed upward in the valley part 9a, and is conveyed to the conveyance part 9b. The conveyance part 9b conveys the conveyed grain in a substantially horizontal direction, and discharges it from the discharge cylinder 9c provided in the front-end | tip part.

In addition, as shown in FIG. 1, most of the valley portion 9 a including the lower half is covered with a cover 91 that can be opened and closed during normal operations and the like. Further, for example, the cover 91 is opened (refer to the arrow in FIG. 4) when the water is supplied to the urea water tank 20 of the exhaust gas purification device or the fuel is replenished (refer to the arrow in FIG. 4) during maintenance, and is disposed below the valley portion 9 a and Equipment and devices nearby are exposed (see Figs. 2 and 3).

In addition, an operator seat (not shown), various joysticks, measuring instruments and operation panels, a display capable of displaying various information, and the like are provided in the cab 7 provided on the upper front side of the body frame 2.

As shown in FIGS. 1 and 2, an engine room 10 is provided below the cab 7 on the body frame 2. The engine room 10 contains a radiator and the like for cooling the engine 11 in addition to the engine 11 as a power source.

The engine 11 arranged in the engine room 10 is a diesel engine, and is housed in the engine room 10 provided in front of the grain tank 8. Here, the engine 11 is provided on the right side of the body frame 2 and is connected to an exhaust gas purification device (not shown) provided on the body frame 2.

The exhaust gas purification device is connected to the exhaust pipe of the engine 11 and includes: a diesel particulate filter (DPF) that removes particulate matter in the exhaust gas; and a urea SCR catalyst that catalyzes the selective use of urea water The reduction method performs a purification process, that is, ammonia generated by hydrolysis of urea water and nitrogen oxides in the exhaust gas after passing through the DPF react to be converted into harmless nitrogen.

In addition, as shown in FIGS. 2 and 3, as a peripheral device of the exhaust gas purification device, a urea water tank 20 for storing urea water supplied to the urea SCR catalyst is provided. In order to suppress the degradation of the urea water, the urea water tank 20 is preferably installed at a position far from the engine 11 so as not to be easily affected by the heat (exhaust heat) from the engine 11.

In the present embodiment, the urea water tank 20 is disposed on the body frame 2 where the grain tank 8 is provided, that is, on the right side of the body, and near the rear of the grain tank 8.

<Arrangement of urea water tank 20>

Here, the arrangement and the like of the urea water tank 20 will be specifically described. FIG. 5 is an explanatory diagram showing a main part of the combine 1. 6 is an explanatory view showing the positional relationship between the grain tank 8 of the combine 1 and the urea water tank 20 in a rear view, and FIG. 7 shows the grain box 8 and urea of the combine 1 in a side view. An explanatory diagram of the positional relationship of the water tank 20. 8 is an explanatory view showing the urea water tank 20 and the tank cover 92 of the combine 1 in a rear view, and FIG. 9 shows the urea water tank 20 and the box cover 92 of the combine 1 in a side view. Illustrating.

The grain box 8 is provided on the body frame 2 on the right side (see FIG. 4) opposite to the threshing device 6 provided on the left side. As shown in FIG. 6, the grain box 8 has a ship bottom formed with inclined bottom walls 81 and 81 on the left and right sides. Shaped bottom. In this way, the bottom of the grain tank 8 is configured with the inclined bottom walls 81 and 81, so that the grains stored in the grain tank 8 can flow down well.

In this embodiment, the inclined inclined surface of the right inclined bottom wall 81 is made steeper than the left. As shown in FIGS. 6 and 7, the storage space 93 formed below the right inclined bottom wall 81 is arranged. There is a urea water tank 20. With this structure, the required capacity of the grain tank 8 can be secured, and at the same time, a space in which the urea water tank 20 can be arranged on the body frame 2 can be secured.

As shown in FIGS. 1 and 2, the storage space 93 is formed in a concave shape toward the inner side of the grain box 8 with a length substantially the same as that of the grain box 8, the longitudinal side is covered with a box cover 92, and the grain is covered with a blocking plate 98. A part of the rear side of the box 8 (see FIG. 5).

As shown in FIG. 8, the tank cover 92 is formed in a substantially L-shaped cross-sectional view with corners chamfered, and thereby the holding stays 22 holding the urea water tank 20 are detachably mounted on the grain tank 8. That is, as shown in FIGS. 8 and 9, the bases of the holding stays 22 and 22 formed in a substantially U-shape are detachably connected to the inclined bottom wall 81 of the grain tank 8, and the urea water tank 20 is hung and supported in front and back. The retaining stays 22, 22; In addition, the front and rear two cover locking stays 23 and 23 are connected to the holding stays 22 and 22 by a connecting rod 24.

Therefore, the tank cover 92 cannot be attached unless the holding stays 22 and 22 are installed in the grain tank 8 and the urea water tank 20 can be arrange | positioned. That is, the inside of the storage space 93 cannot be viewed visually with the box cover 92 attached. However, in order to attach the box cover 92, the holding stays 22 and 22 for holding the urea water tank 20 must be attached to the grain box 8. By attaching the tank cover 92 in a state where the urea water tank 20 is not provided in the storage space 93, it is possible to prevent the possibility that the exhaust gas purification device does not fully function and cause engine failure.

In this way, the urea water tank 20 is arranged on the grain tank 8 in a storage space 93 formed under the inclined bottom wall 81 on the right side of the grain tank 8 with a hanging support body, and the outer side and Below. Therefore, for example, it is possible to prevent mud from the crawler 3a of the traveling device 3, and it is possible to maintain the hygiene of the urea water tank 20.

On the other hand, as shown in FIG. 6, a screw mechanism 40 is provided inside the inclined bottom wall 81 of the grain box 8 to convey the grain in the grain box 8 toward the valley portion 9 a. The screw cover 85 can be opened and closed freely. Ground covers the lower part of the screw mechanism 40. In this embodiment, an openable and closable screw cover 85 can be opened and closed by an opening and closing mechanism 86 having a trigger mechanism or the like.

In the storage space 93, an operation space 800 for operating the opening and closing mechanism 86 is formed between the urea water tank 20 and the inclined bottom wall 81 of the grain tank 8. Therefore, by using the operation space 800, the opening and closing operation of the screw cover 85 covering the lower part of the screw mechanism 40 can be easily performed. When the grain remaining in the grain tank 8 is discharged and the next field harvesting operation is performed, It can prevent the mixing of different varieties of cereals.

In addition, a cover 91 capable of being opened and closed is provided at the rear portion of the grain tank 8, and the cover 91 integrally covers the storage space 93 in which the urea water tank 20 is arranged and the rear opening 94 of the valley portion 9 a. As shown in FIG. 4, the cover body 91 is formed in a substantially L-shaped cross-section, and is equipped with a handle 910. As shown in FIG. 3, the cover body 91 is openable and closable by rotating shafts 915 and 915 provided up and down.

When the cover 91 is opened, the water supply port 21 of the urea water tank 20 is formed from the rear portion of the storage space 93, that is, between the rear side surface 82 of the grain tank 8 and the blocking plate 98 covering the rear portion of the storage space 93. The rear opening 94 is exposed.

As shown in FIGS. 6 and 7, the urea water tank 20 is formed in a rectangular box shape having a predetermined width, height, and length, and a switch is freely provided on an inclined surface formed by connecting the rear surface and the upper surface. Install a covered water supply port 21.

The urea water tank 20 is arranged in the storage space 93 so that the water supply port 21 faces rearward. Further, as shown in FIG. 7, the water supply port 21 of the urea water tank 20 is disposed forward of the rear side surface 82 of the grain tank.

Therefore, it is possible to reduce the accumulation of straw chips and the like at the water supply port 21 of the urea water tank 20 or the cover or the like attached to the water supply port 21.

In addition, as shown in FIG. 5, when the cover 91 is opened, for example, a working space 100 is formed at the rear of the water supply port 21 of the urea water tank 20 to which a working tray (loading table) 95 can be installed. Taiwan) 95 holds a plastic tank for supplying water to the urea water tank 20 or a fuel tank for refueling.

As shown in FIG. 5, a driving motor 900 that drives the screw mechanism of the valley portion 9 a is disposed in the work space 100 at a position rearward of the valley portion 9 a. The work tray 95 is detachably attached. Here, a through-insertion hole (not shown) is formed on the side surface of the motor housing 901, and a locking piece protruding to a side edge of the work tray 95 is inserted into the through-hole to allow work to be performed. The tray 95 is kept horizontal.

In addition, a fuel supply port 96 of a fuel tank (not shown) faces into the working space 100, and the fuel supply port 96 and the water supply port 21 of the urea water tank 20 are provided so as to point toward the working tray 95. In addition, the working tray 95 is configured to be held horizontally lower than the water supply port 21 and the oil supply port 96 in consideration of the height of the plastic box and the like. Therefore, when the cover 91 is opened to secure the work space 100 and the work tray 95 is installed, both the water supply work to the urea water tank 20 and the fuel supply work to the fuel tank can be easily performed. In FIG. 5, reference numeral 97 denotes a rubber member that receives popped up or dripped oil during oil supply.

As shown in FIG. 5, a plurality of hoses 300 are provided along the rear side surface 82 of the grain tank 8 so as to communicate with the urea water tank 20. The plurality of hoses 300 are, for example, a urea water loop hose connected to a urea SCR catalyst of the exhaust gas purification device, or a cooling water hose that loops the cooling water of the engine 11. In this way, the hose 300 connected to the urea water tank 20 is bent from the rear opening 94 of the storage space 93 to the left side of the body and is laid along the rear side surface 82 of the grain tank 8 and is held by the clamp 310.

With this structure, for example, even when the grain tank 8 is rotatable, that is, a structure that can be rotated in the horizontal direction (see other embodiments), even if the grain tank 8 is rotated about the vertical axis, the The amount of movement is limited to a minimum, and problems such as damage to the hose 300 can be reduced. In addition, the length of the hose 300 can be as short as possible, and troubles such as winding the hose 300 can be prevented in advance.

As described above, the exposed working space 100 such as the water supply port 21 of the urea water tank 20, the fuel supply port of the fuel tank, and the drive motor 900 that drives the screw mechanism of the valley lifting portion 9a of the grain discharge auger 9 is usually covered by the cover 91. cover. Therefore, they can be protected from external impacts, and the appearance can be improved.

In addition, by opening the cover 91 covering the valley portion 9a, the work space 100 is formed behind the water supply port 21, so workability such as maintenance is also improved. For example, a work tray 95 is provided in the work space 100. The work tray 95 can easily perform water supply work from the water supply port 21.

In addition, a lower rotating shaft 915 (refer to FIG. 3) that supports the cover 91 to be freely opened and closed is provided at a position that avoids the rear opening 94 provided to the water supply port 21 of the urea water tank 20, and is specifically provided at a ratio The rear opening 94 is positioned outside and above the body. Therefore, the rear opening 94 provided to the water supply port 21 faces the working space 100 as a whole, and the rotation shaft 915 does not hinder the water injection operation.

In addition, as shown in FIG. 7, the urea water tank 20 is disposed on a sloped bottom wall 81 provided on the inclined bottom wall 81 on the right side of the grain tank 8 so as to face the storage space 93, and sandwiches the rice outflow port 83 forward and backward. The provided rice bag locking hook 84 is positioned rearward.

That is, on the inclined bottom wall 81 on the right side of the grain box 8, there are provided a plurality of rice bag locking hooks 83 for taking out rice and the like remaining in the grain box 8, and a rice bag lock for locking the rice bag 500 for storing rice. 84. When the rice is taken out, the tank cover 92 is removed for operation. However, in the present embodiment, the urea water tank 20 is disposed behind the rice take-out opening 83 and the rice bag locking hook 84. Therefore, since the urea water tank 20 does not easily interfere with the rice extraction operation, the operation can be performed more smoothly. Although a detailed description of the structure of the rice extraction port 83 is omitted, a freely-closable shutter is provided in the opening formed in the grain tank 8 and a sliding part 83a is provided to guide rice and the like discharged through the shutter to the outside of the body.

In addition, the combine 1 according to the present embodiment is provided with a mudguard 400 between the urea water tank 20 described above and the crawler 3 a of the traveling device 3. FIG. 10 is an explanatory diagram showing the mudguard 400 included in the combine 1 in a rear view, and FIG. 11 is an explanatory diagram showing the mudguard 400 in a plan view.

As shown in FIGS. 10 and 11, the mudguard 400 is provided on the right side of the body frame 2 and has a width slightly protruding from the outer edge of the track 3 a. By providing the mudguard 400, it is possible to more reliably prevent the mud from the crawler 3a from entering the storage space 93 by cooperating with the tank cover 92. Therefore, it is possible to maintain the hygiene of the urea water tank 20 disposed in the storage space 93.

In addition, as shown in FIG. 10, the upper surface 401 of the mudguard 400 is formed as an inclined surface having a slope that is downward toward the outside of the body. By forming the inclined surface, it is possible to prevent garbage such as straw shavings from being accumulated on the mud guard 400. In this embodiment, the inclination angle of the upper surface 401 of the mudguard 400 is made substantially the same as the inclination angle of the sliding part of the rice extraction opening 83 located above the mudguard 400 so as not to hinder the rice extraction 83 Take out the rice.

(Other embodiments)

In the above-mentioned embodiment, the case where the grain tank 8 is fixedly installed on the body frame 2 has been described. However, the grain tank 8 may be configured to be able to rotate from the working position on the body frame 2 to the outside of the body frame 2 for maintenance. position. FIG. 12 is an explanatory diagram showing a grain box rotating mechanism of the combine 1 in another embodiment in a front view, and FIG. 13 is an explanatory diagram showing a configuration of a rice sensor 250 constituting the grain box rotating mechanism. . FIG. 14 is a right side view of the combine 1 according to another embodiment. In addition, in FIG. 12 to FIG. 14, elements having the same functions as those of the previous embodiment are denoted by the same reference numerals, and detailed descriptions thereof are omitted.

The grain bin 8 according to the present embodiment is configured to be able to rotate (rotate) in a horizontal direction by using a grain bin rotating mechanism as a vertical axis (not shown) provided at the rear of the bin as a center. At this time, the fixing hook 260 provided on the upper portion of the front side surface 87 of the box is engaged with the body side frame (not shown) side to be locked, and the lock pin 210 is inserted into the lock hole 220 provided in the body frame 2. In this way, when the grain tank 8 is closed, a double lock is applied to prevent accidental rotation as much as possible.

In addition, in the present embodiment, as shown in FIGS. 12 and 14, the control unit 200 is provided to control the grain box rotating mechanism, and is configured such that the lock pin 210 cannot be released as long as the predetermined condition is not satisfied.

That is, in addition to the fixing hook 260 and the lever 270 connected to the fixing hook 260 by a link 280, the grain box rotation mechanism has a lock pin 210 provided on the grain box 8 side and a lock hole provided on the body frame 2. 220, a motor 230 for moving the lock pin 210 up and down, and an operation switch 240 (see FIG. 14) provided on the side of the grain tank 8 and driving the motor 230 when the switch is closed.

As shown in FIGS. 13 and 14, the grain box rotation mechanism includes a rice sensor 250 that detects the amount of grain in the grain box 8, and a control unit 200 that detects a predetermined value in the rice sensor 250. When the amount of grains is greater than or equal to the amount, regardless of the operation of the operation switch 240, the driving of the motor 230 is prohibited.

According to the configuration described above, the rice sensor in the grain box 8 is used to detect the remaining amount of rice. When the rice is stored in a predetermined amount or more, the control unit 200 prohibits the driving of the motor 230 so that the lock pin 210 does not move. It will be pulled out from the locking hole 220. In this way, when the grain tank 8 is rotated, it is a condition that most of the rice is discharged from the grain tank 8.

As described above, according to the present embodiment, the grain tank 8 cannot be rotated around the longitudinal axis of the machine body in a state where the grain tank 8 has a predetermined amount or more of grains stored therein, so that damage to the longitudinal axis and the grain tank 8 can be prevented.

When the grain box 8 is rotated to a predetermined amount or less, as shown in FIG. 14, the operation switch 240 provided on the right side of the grain box 8 is pressed to move the lock pin 210 upward from the lock hole. 220 is pulled out, and the lever 270 linked with the fixed hook 260 is operated to unlock the fixed hook 260, so that the grain bin 8 can be turned. In addition, it is preferable that the lock pin 210 can be manually moved up and down so that the grain box 8 can be rotated even if the operation switch 240 fails.

In addition, a sensor (not shown) or the like that detects the position of the lock pin 210 may be provided and connected to the control unit 200 of the grain box rotating mechanism in advance, and the control unit 200 and the engine 11 may be connected. The control engine control unit (not shown) is connected, and when the lock pin 210 is not completely inserted into the lock hole 220, the start of the engine 11 is prohibited. By adopting the above-mentioned structure, it is possible to prevent a situation in which the vehicle is traveling in a state where the grain tank 8 may be opened.

On the other hand, when the engine 11 is started, the drive of the motor 230 that moves the lock pin 210 is prohibited, and it is possible to prevent the grain tank 8 from being rotatably erroneously during traveling.

In addition, as one of the operation modes of the combine 1, the cleaning mode of the grain bin 8 is set in advance. When the cleaning mode is set, the control unit 200 or the engine control unit can enable the engine 200 even when the engine 11 is started. The motor 230 is driven.

In addition, instead of separating the control unit 200 from the engine control unit, the control of the engine 11 and the control of the grain box rotation mechanism may be performed by one control unit.

However, in the present embodiment, the urea water tank 20 is disposed in the storage space 93 formed below the inclined bottom wall 81 of the grain tank 8, but does not hinder the rotation of the grain tank 8. That is, since the urea water tank 20 is suspended and supported by the grain tank 8, when the grain tank 8 is rotated around the rotation axis, the urea water tank 20 is also rotated together.

According to the embodiment described above, the following combine harvester 1 can be realized.

(1) A combine harvester 1 provided with a grain box 8 that stores grain obtained by threshing device 6 and a grain discharge device 9 that stores the grain in the grain box 8 Exhaust of grains; and an exhaust gas purification device having a urea SCR catalyst that reduces the exhaust gas of the engine 11 by using ammonia generated from urea water to perform purification treatment, and a valley portion of the grain exhaustion device 9 9a is arranged on the rear side of the grain tank 8. The combine harvester 1 is provided with a urea water tank 20 that stores urea water supplied to the urea SCR catalyst, and the combine harvester 1 is provided with a cover 91 that can be opened and closed freely. The cover 91 integrally covers the water supply port 21 and the valley portion 9a of the urea water tank 20.

(2) A combine harvester 1 in the configuration of (1) above, the water supply port 21 is disposed to face the rear of the machine body, and the water supply port 21 is disposed on the front side of the rear side 82 of the grain tank 8.

(3) A combine harvester 1 in the above-mentioned structure (1) or (2) is configured such that, in a state where the cover body 91 is opened, a bearing platform 95 can be provided on the rear side of the water supply port 21.

(4) A combine harvester 1 in the structure of the above (3), the lower part of the grain tank 8 has an inclined bottom wall 81, and a urea water tank 20 is arranged in a storage space 93 formed below the inclined bottom wall 81 And water outlet 21.

(5) A combine harvester 1 in the structure of (4) above, the urea water tank 20 is supported on the grain tank 8 side, and the grain tank 8 is supported to be rotatable about the longitudinal axis toward the outside of the body, and along the grain tank 8 A plurality of hoses 300 communicating with the urea water tank 20 are provided on the rear side of the rear side.

In addition, other modifications or effects of the above-described embodiment can be easily derived by those skilled in the art. Therefore, the embodiments with a larger scope of the present invention are not limited to the specific details and typical embodiments shown and described as described above. Accordingly, various changes may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

1‧‧‧ combine harvester

2‧‧‧frame

3‧‧‧ Driving device

3a‧‧‧track

3b‧‧‧Drive Wheel

3c‧‧‧Tightening pulley

4‧‧‧ Harvesting device

4a‧‧‧point straw

4b‧‧‧Lifting device

6‧‧‧Thresher

7‧‧‧ cab

8‧‧‧ Grain Box

9‧‧‧ Grain discharge auger (grain discharge device)

9a‧‧‧Yangu Department

9b‧‧‧Transportation Department

9c‧‧‧Discharge tube

10‧‧‧Engine Room

11‧‧‧Engine

20‧‧‧Urea water tank

21‧‧‧ water inlet

22‧‧‧ keep the stay

23‧‧‧Cover lock stay

24‧‧‧ connecting rod

40‧‧‧Screw mechanism

81‧‧‧inclined bottom wall

82‧‧‧ rear side

83‧‧‧ Rice export

83a‧‧‧ sliding part

84‧‧‧ Rice Bag Locking Hook

85‧‧‧Screw cover

86‧‧‧Opening and closing mechanism

87‧‧‧ front side of box

91‧‧‧ cover

92‧‧‧box cover

93‧‧‧Storage space

94‧‧‧ rear opening

95‧‧‧Working pallet (bearing table)

96‧‧‧ fuel supply port

97‧‧‧Rubber parts

98‧‧‧blocking plate

100‧‧‧working space

200‧‧‧Control Department

210‧‧‧ lock pin

220‧‧‧ lock hole

230‧‧‧Motor

240‧‧‧operation switch

250‧‧‧ Paddy sensor

260‧‧‧Fixed hook

270‧‧‧par

280‧‧‧ connecting rod

300‧‧‧ hose

310‧‧‧Clamp

400‧‧‧ Mudguard

401‧‧‧upper surface

500‧‧‧ rice bags

800‧‧‧operation space

900‧‧‧ drive motor

901‧‧‧Motor housing

910‧‧‧handle

915‧‧‧Rotating shaft

FIG. 1 is a right side view of the combine of the embodiment. It is a right view which shows the state which opened the cover which covered the rear part of the combine. Fig. 3 is a rear view of the combine. FIG. 4 is a plan view of the combine. FIG. 5 is an explanatory diagram showing a main part of the combine. FIG. 6 is an explanatory view showing a positional relationship between a grain tank and a urea water tank of the combine in a rear view. 7 is an explanatory view showing a positional relationship between a grain tank and a urea water tank of the combine in a side view. FIG. 8 is an explanatory view showing a urea water tank and a cover of the combine in a rear view. 9 is an explanatory view showing a urea water tank and a cover of the combine in a side view. FIG. 10 is an explanatory view showing a mudguard included in the combine in a rear view. FIG. 11 is an explanatory view showing the mudguard in a plan view. It is explanatory drawing which shows the grain box rotation mechanism of the combine of other embodiment as a front view. FIG. 13 is an explanatory diagram showing the arrangement of a rice sensor constituting the grain box rotating mechanism. FIG. 14 is a right side view of the combine of the other embodiment.

Claims (5)

A combine harvester is provided with a grain box (8) that stores grain obtained by threshing device (6), and a grain discharge device (9) that will be stored in the grain box (8) Exhaust of grains; and an exhaust gas purification device having a urea SCR catalyst, which uses ammonia generated from urea water to reduce and exhaust the exhaust gas of the engine (11), and the combined harvester is characterized by The grain lifting device (9a) of the grain discharge device (9) is disposed on the rear side of the grain tank (8), and the combine is provided with a urea water tank (20 ), And a cover body (91) capable of being opened and closed is provided, and the cover body (91) integrally covers the water supply port (21) of the urea water tank (20) and the valley portion (9a). The combine harvester according to item 1 of the scope of patent application, wherein the water supply port (21) is arranged to face the rear of the machine body, and the water supply port (21) is arranged more forward than the rear side of the grain box (8) Side position. According to the combined harvester described in item 1 or 2 of the scope of patent application, wherein the combined harvesting mechanism is: in the state where the cover (91) is opened, a bearing platform can be provided on the rear side of the water supply port (21) (95). The combine according to item 3 of the scope of patent application, wherein the lower part of the grain box (8) has an inclined bottom wall (81), and a storage space (93) formed below the inclined bottom wall (81) The urea water tank (20) and the water supply port (21) are arranged inside. The combine harvester according to item 4 of the scope of patent application, wherein the urea water tank (20) is supported on one side of the grain tank (8), and the grain tank (8) is supported so as to be able to face the outside of the body about the longitudinal axis Rotating, a plurality of hoses (300) communicating with the urea water tank (20) are arranged along the rear side of the grain tank (8).