JP2017180181A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate replenishment for urea water to mitigate burden of an operator.SOLUTION: A combine harvester includes a driver seat arranged at a machine body front part, a drive sprocket 34 rotatably supported to a machine body left part, and an endless feed chain 36 wound around the drive sprocket 34. At the rear of the driver seat, provided is an NOx purification device (purifier) configured to purify exhaust gas from an engine 12 with urea water (liquid reductant) and catalyst. A replenishment port 63 of a urea water tank (storage tank) 47 storing urea water is arranged at a lower part of the feed chain 36, and at the rear of a front end of the feed chain 36 and in front of the drive sprocket 34.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a combine for threshing a harvested culm, and more particularly to a combine provided with an exhaust gas purification device for an engine.

  In general, an SCR method (selective contact reduction method) is known in which NOx contained in exhaust gas generated in a diesel engine is reduced using a reducing agent typified by urea water. Conventionally, a combine that can detect and notify the remaining amount of the reducing agent in the SCR method has been proposed (see Patent Document 1).

Japanese Patent No. 537312

  However, the combine described in Patent Document 1 has a problem that it is difficult to replenish the reducing agent because the tank of the reducing agent is disposed in a position where the tank of the reducing agent is recessed in the left-right direction. There is a feed chain outside the supply port of the reducing agent tank, and when the reducing agent is replenished, the operator's hand may become dirty or the operator may be injured.

  Then, an object of this invention is to provide the combine which can perform replenishment of a reducing agent and can reduce an operator's burden.

The present invention comprises a driver's seat (11) disposed at the front of the fuselage (3), an engine (12), a drive sprocket (34) rotatably supported on the left of the fuselage (3), In a combine (1, 101) comprising: an endless feed chain (36) wound around the drive sprocket (34); and a pretreatment unit (5) for cutting grain cereals in a field.
A purification device (45, 145) for purifying exhaust gas generated by the engine (12) with a liquid reducing agent and a catalyst;
A storage tank (47) having a liquid reducing agent supply port (63) and storing the liquid reducing agent;
The replenishing port (63) is disposed below the feed chain (36), behind the front end (36a) of the feed chain (36) and ahead of the drive sprocket (34).
It is characterized by that.

For example, referring to FIG. 3, FIG. 4, FIG. 5 and FIG. 7, a support part (29) for supporting the pretreatment part (5) is provided,
The support portion (29) is formed in an arch shape so as to cover a part of the storage tank (47).

  For example, referring to FIGS. 4 and 7, the heat shield (62) is fixed to the support (29) and disposed between the storage tank (47) and the engine (12). Prepare.

  For example, referring to FIGS. 4, 5, and 7, a cover body (61) that covers at least a part of the front portion of the storage tank (47) is fixed to the support portion (29).

For example, referring to FIG. 3, FIG. 5 and FIG. 6, the support portion (29) is provided with a shaft support portion (51) that supports the pretreatment portion (5) so that it can be opened and closed horizontally.
The storage tank (47) is arranged in front of the shaft support (51).

  For example, referring to FIG. 1 and FIG. 4, the tip of the replenishing port (63) is arranged so as to at least partially overlap the feed chain (36) in plan view.

  In addition, although the code | symbol in the said parenthesis is for contrast with drawing, it does not limit the structure of this invention at all.

  According to the first aspect of the present invention, the replenishment port provided in the storage tank is disposed below the feed chain provided at the left side of the fuselage, in front of the drive sprocket and behind the front end of the feed chain. . Thereby, since the replenishing port can be arranged at a position where the operator can easily replenish in the left part of the machine body, it is possible to improve the replenishment workability of the liquid reducing agent.

  According to the second aspect of the present invention, since the support portion that supports the pretreatment portion is formed in an arch shape so as to cover the storage tank, the dead space is effectively used and the rigidity of the support portion is ensured. At the same time, the storage tank can be protected.

  According to the third aspect of the present invention, since the heat shield plate is disposed between the storage tank and the engine and the heat shield plate is fixed to the support portion, the deterioration of the liquid reducing agent due to the heat generated from the engine is prevented. be able to.

  According to the fourth aspect of the present invention, since the cover body that covers at least a part of the front portion of the storage tank is fixed to the support portion, the periphery of the storage tank is caused by accumulation of mud splashes and sawdust from the traveling device. Can be easily cleaned.

  According to the fifth aspect of the present invention, the support portion is provided with the shaft support portion that supports the pretreatment portion so that it can be opened and closed in the horizontal direction, and the storage tank is disposed in front of the shaft support portion, so the pretreatment portion is opened. As a result, access to the periphery of the storage tank is facilitated, and cleaning around the storage tank, replacement of the storage tank and piping, and the like can be easily performed.

  According to the sixth aspect of the present invention, since the tip of the replenishing port is arranged so that at least a part thereof overlaps the feed chain in a plan view, the replenishing port can be easily accessed from outside the apparatus, and the liquid reducing agent It is possible to improve the replenishment workability. In addition, since the replenishing port does not protrude to the outside of the machine body more than the feed chain, the possibility that the replenishing port collides with other obstacles can be reduced, and damage to the replenishing port can be prevented.

It is a top view which shows the combine which concerns on 1st Embodiment. It is a left view which shows a combine. It is a left view which shows the structure of an engine and a support part. It is a front view which shows the structure of an engine and a support part. It is a perspective view which shows the structure of an engine and a support part. It is a top view which shows the combine in a pre-processing part open position. It is a front right perspective view which shows a support part. It is a top view which shows the combine which concerns on 2nd Embodiment. It is a right view which shows a combine.

<First Embodiment>
As shown in FIGS. 1 and 2, the combine 1 according to the first embodiment has a body 3 supported by a traveling device 2 that is a pair of left and right crawler traveling devices. A pre-processing unit 5 that cuts and transports the grain culm in the field is provided in the forward direction. On the front right side of the machine body 3 is provided a cabin 6 on which an operator performs a driving operation. On the front left side of the machine body 3, the cereals harvested and transported by the pretreatment unit 5 are threshed. A threshing device 7 for sorting is provided. Behind the cabin 6 is disposed a Glen tank 9 for storing the grains that have been threshed and sorted by the threshing device 7, and stored in the Glen tank 9 at the rear of the Glen tank 9. A discharge auger 10 for discharging grains to the outside of the machine is supported so as to be able to turn.

  A diesel engine 12 is arranged below and behind the driver's seat 11 provided in the cabin 6. In the present embodiment, the front direction facing the operator seated on the driver's seat 11 is defined as the front, and the front, rear, left, and right directions are defined based on this. The power generated by the engine 12 is transmitted through the traveling transmission 17 and the working transmission 18 (see FIG. 3), respectively, to the traveling device 2, the preprocessing unit 5, the threshing device 7, and a drive sprocket 34 to be described later. And transmitted to.

  In the pretreatment unit 5, a plurality of weed bodies 24 that weed the planted cereals are integrally attached to a weed body support frame 25. Behind the weed body 24, an elevating device 26 that causes the planted culm sprouted by the weed body 24 and a cutting blade device 27 that cuts the stock of the culm caused by the elevating device 26 are arranged. ing. The cereal carrying device 20 is arranged behind the cutting blade device 27, and the cereal that has been cut by the cutting blade device 27 is adjusted to an appropriate handling depth by the cereal carrying device 20. It is conveyed toward the threshing device 7. A guide plate 21 that guides the ear side of the harvested corn straw along the conveyance path is disposed between the corn straw conveyance path and the cabin 6 in the corn straw conveying apparatus 20.

  As shown in FIGS. 3 to 5, an engine 12 is mounted on a body frame 13 that is a base frame of the body 3, and a radiator (see FIG. (Not shown) and a cooling fan 15 for cooling the radiator are disposed. A support part 29 that supports the pre-processing part 5 is projected from the left front part of the machine body frame 13, and the support part 29 is arranged on the left side of the engine 12.

  Next, a configuration for raising and lowering and opening and closing the preprocessing unit 5 will be described. The pretreatment unit 5 is supported by the support unit 29 via the pretreatment support frame 22. The pre-processing support frame 22 is supported by the upper end of a longitudinal axis (axial support) 51 (to be described later) of the support portion 29, and the horizontal pipe 30 is extended to the cabin 6 side in the left-right direction. The base end portion is fixed to the distal end portion of the horizontal pipe 30, and has a vertical pipe 31 that extends forward between the cabin 6 and the cereal conveyance device 20. The horizontal pipe 30 is rotatable with respect to the support portion 29 about the pretreatment unit lifting support shaft O1 that is the axis of the horizontal pipe 30 and is a pretreatment side open rotation shaft that is the axis of the vertical axis 51. It is supported so as to be rotatable in the horizontal direction around O2.

  Further, as shown in FIG. 5, an input pulley 32 to which a driving force is input from the work transmission 18 via a belt (not shown) is disposed at the tip of the horizontal pipe 30. It is transmitted to each drive unit of the pre-processing unit 5 via a drive shaft (not shown) in the horizontal pipe 30 and the vertical pipe 31. Then, by connecting a piston rod (not shown) such as a hydraulic cylinder between the vertical pipe 31 and the machine body 3 and driving the piston rod to extend, the vertical pipe 31 moves the pretreatment unit lifting support shaft O1. By rotating upward about the center, the pretreatment unit 5 rises and the piston rod is driven to contract, whereby the vertical pipe 31 rotates downward about the pretreatment unit lifting support shaft O1 and the pretreatment unit 5 Descend. Further, as shown in FIG. 6, the pretreatment unit 5 is rotatable in the horizontal direction when the proximal end portion of the horizontal pipe 30 is rotated around the pretreatment side open rotation axis O2. The pre-processing unit 5 can be switched between a cutting work position located in front of the body 3 and an open position where the front of the body 3 is opened.

  As shown in FIG. 3, the cereals harvested by the preprocessing unit 5 are conveyed to the threshing device 7 by the endless feed chain 36 and the sandwiching rail 28. The feed chain 36 is wound around a drive sprocket 34 rotatably supported on the left part of the machine body 3 and a plurality of driven sprockets 35, and a left side surface is covered with a side cover 37. The drive sprocket 34 is disposed rearward from the front end 36a of the feed chain 36 by a predetermined distance, and is rotated by 18 power from the work transmission. The side cover 37 covers the feed chain 36 to prevent dirt on the drive part due to mud splash or the like and injury to the operator.

  Next, the particulate matter removing device (hereinafter referred to as DPF) 39 and the NOx purification device (purification device) 45 will be described. As shown in FIGS. 1 and 2, a DPF 39 and a NOx purification device 45 are provided on the body frame 13. The DPF 39 is disposed between the engine 12 and the grain tank 9 in the front-rear direction, and the NOx purification device 45 is disposed between the threshing device 7 and the grain tank 9 in the left-right direction. The suction port of the DPF 39 is connected to the upper part of the engine 12 by a connection pipe 40 extending upward from the DPF 39. The discharge port of the DPF 39 is connected to the suction port of the NOx purification device 45 by a relay pipe 43. A discharge port of the NOx purification device 45 is connected to an exhaust pipe 50 extending in the front-rear direction between the grain tank 9 and the threshing device 7. The fuel supplied to the engine 12 is stored in a fuel tank 41 disposed at the rear part of the body 3, and a fuel supply port 42 of the fuel tank is formed at the left rear part of the body 3.

  The DPF 39 collects particulate matter mainly composed of graphite contained in the exhaust gas of the engine 12 and further burns to remove the particulate matter. The NOx purification device 45 reduces NOx (nitrogen oxide) in the exhaust gas to make it harmless and attenuates the exhaust sound. The NOx purification device 45 has a NOx removal catalyst (not shown) that is a selective catalytic reduction catalyst using urea water as a liquid reducing agent. The NOx purification device 45 has a structure in which a NOx removal catalyst and an ammonia removal catalyst (not shown) are arranged in series.

  A urea water tank (storage tank) 47 is connected to the relay pipe 43 connecting the DPF 39 and the NOx purification device 45 via a pump 49 (see FIGS. 3 to 5) by a urea water supply pipe 46. . The urea water tank 47 is placed on the machine body frame 13 and stores urea water. The urea water is configured to be injected into the relay pipe 43 via the urea water supply pipe 46 by a pump 49 provided in the vicinity of the urea water tank 47.

  By injecting the urea water into the exhaust gas, the urea water is hydrolyzed at a high temperature to generate ammonia gas. This ammonia gas and NOx removal catalyst reduce NOx, generating nitrogen gas and water vapor. Unreacted ammonia gas remaining in the exhaust gas is removed by an ammonia removal catalyst. The exhaust gas that has passed through the NOx purification device 45 is released from the exhaust pipe 50 to the outside air.

  The urea water tank 47 is disposed at a position overlapping the engine 12 in the front-rear direction, and is disposed relatively close to the engine 12. Therefore, the urea water in the urea water supply pipe 46 and the urea water tank 47 can be warmed by exhaust heat of the engine 12 and heat radiation from the cooling water of the radiator, and the urea water can be prevented from freezing.

  Next, the structure of the support part 29 is demonstrated. As shown in FIG. 7, the support portion 29 includes a vertical axis 51, a vertical column 52, a horizontal beam 53, a diagonal beam 54, a guard column 55, a receiving member 56, and a fixing member 57. Yes. On the body frame 13, a cylindrical vertical axis 51, and a vertical column 52 that is substantially parallel to the vertical axis 51 and arranged to the right of the vertical axis 51 stand up in a substantially vertical direction. A horizontal beam 53 is fixed to the vertical axis 51 and the vertical column 52 substantially horizontally by connecting the upper ends of the vertical columns 52. Further, one end is fixed to the connecting portion between the vertical column 52 and the horizontal beam 53 and the other end is fixed to the body frame 13, and an oblique beam 54 is provided. It is formed so as to descend from the front to the front. One end is fixed to the connecting portion between the vertical axis 51 and the cross beam 53, the other end is fixed to the body frame 13, and a guard column 55 is provided. The guard column 55 is formed by bending in a square shape. One end extends substantially horizontally forward from the connecting portion of the vertical axis 51 and the cross beam 53, and the other end extends substantially vertically upward from the body frame 13. That is, the vertical axis 51 and the guard column 55 are formed in an arch shape. Further, a plate-like side plate 59 is fixed to the vertical column 52 and the oblique beam 54 so as to block an area surrounded by the vertical column 52, the oblique beam 54 and the body frame 13.

  A cylindrical receiving member 56 is provided at the upper end of the vertical axis 51 so as to pivotally support the horizontal pipe 30 about the pretreatment unit lifting support shaft O1. The receiving member 56 is pretreated side-open. It is supported on the vertical axis 51 so as to be rotatable about a rotation axis O2. A fixing member 57 is fixed to the upper end of the vertical column 52, and the fixing member 57 supports the distal end portion of the horizontal pipe 30 so as to be rotatable about the pretreatment unit lifting support shaft O1, It has a switching structure that can be switched to a released state in which the tip of the horizontal pipe 30 is released. When the fixing member 57 holds the tip of the horizontal pipe 30 in a fixed state, the pretreatment unit 5 is fixed at the cutting operation position, and the fixing member 57 fixes the tip of the horizontal pipe 30 to the base of the horizontal pipe 30. The receiving member 56 supports the end so as to be rotatable, whereby the pretreatment unit 5 is supported by the support unit 29 so as to be movable up and down. When the fixing member 57 is in the released state, the pretreatment unit 5 is rotatably supported by the support unit 29 in a state where the fixing member 57 can be set to the open position (see FIG. 6).

  An attachment member 60 is fixed to the horizontal beam 53, and a pump 49 and a cover body 61 are detachably fixed to the attachment member 60 by bolts. Further, the heat shield plate 62 and the cover body 61 are integrally fixed to the horizontal beam 53 via the mounting member 60, and the heat shield plate 62 is interposed between the urea water tank 47 and the oblique beam 54. The urea water tank 47 is arranged substantially in parallel with the right surface. The heat shield plate 62 is generally made of an aluminum alloy plate or a heat shield sheet using aluminum foil attached to a metal plate, and has a high light reflectance on the surface thereof. Yes. The radiant heat generated in the engine 12 is diffused by the metallic side plate 59 and reflected by the heat shield plate 62 so that it is difficult to be transmitted to the urea water tank 47. The cover body 61 is formed to cover at least a part of the front surface of the urea water tank 47, at least a part of the upper surface of the urea water tank 47, and the pump 49. Although the heat shield plate 62 and the cover body 61 are provided integrally, they may be provided separately. The heat shield plate 62 may be formed of a general steel plate or the like. In that case, the cost can be reduced as compared with the case of using an aluminum alloy plate or the like.

  The urea water tank 47 is formed in a box shape, and is disposed so as to be surrounded by the upper surface of the body frame 13, the vertical axis 51, and the guard pillar 55. A supply port 63 is formed on the left side of the urea water tank 47. The replenishing port 63 is disposed below the feed chain 36, behind the front end of the feed chain 36, and ahead of the drive sprocket 34 so as to at least partially overlap the feed chain 36 in plan view.

  Since the present embodiment is configured as described above, the replenishment port 63 formed in the urea water tank 47 is located below the feed chain 36, in front of the drive sprocket 34 and behind the front end of the feed chain 36. Is arranged. As a result, the replenishment port 63 of the urea water tank 47 is arranged at a position and height where it is easy for the operator to replenish, and it is difficult for the operator to replenish the feed chain 36 and the like when replenishing the urea water. Since it is eliminated, the urea water supply workability can be improved.

  Further, since the replenishing port 63 is formed so that the tip of the replenishing port 63 partially overlaps with the feed chain 36, it is not necessary for the operator to replenish urea water using a long nozzle or the like. Workability can be improved. Furthermore, since the replenishment port 63 is provided on the left side of the machine body as the fuel replenishment port 42 of the fuel tank 41, the operator does not have to go back and forth between the right side and the left side of the combine when refueling the fuel tank. It is possible to improve the workability of supplying urea water. Further, since the urea water tank 47 is disposed in the vicinity of the relay pipe 43, the urea water supply pipe can be shortened, so that the cost of parts can be suppressed and the labor of maintenance can be saved.

  In the support unit 29 that supports the pretreatment unit 5, the vertical axis 51 and the guard column 55 are formed in an arch shape and cover the urea water tank 47. The urea water tank 47 can be protected while ensuring rigidity. Since the weight of the pretreatment unit 5 is applied to the support unit 29, a substantially upward tensile force, a rotational moment, or the like is applied to the vertical axis 51 and the vertical column 52. Since the vertical axis 51 and the vertical column 52 are supported by the guard column 55, the oblique beam 54, and the horizontal beam 53, respectively, the vertical axis 51 and the vertical column 52 can be prevented from being damaged or distorted.

  Since the side plate 59 and the heat shield plate 62 are provided between the engine 12 and the urea water tank 47, the heat generated in the engine 12 is not easily transmitted to the urea water in the urea water tank 47, and the urea water is deteriorated by the heat. Hard to do. Thereby, shortening of the expiration date of urea water and a reduction of the purification function by the NOx purification device can be prevented, and unnecessary costs can be avoided.

  Since the cover body 61 that covers at least a part of the front surface of the urea water tank 47, at least a part of the upper surface of the urea water tank 47, and the pump 49 is provided, mud splashing by the traveling device 2, feed chain 36, etc. It is possible to reduce the soiling of the urea water tank 47 and the pump 49 due to the sawdust falling from above, and to improve the cleaning workability around the urea water tank 47. Moreover, when supplying urea water, the opportunity for foreign matters such as mud and swarf to be mixed into the urea water tank 47 can be reduced, and deterioration of the purification function by the NOx purification device 45 can be prevented.

  The pretreatment unit 5 is provided so as to be openable and closable with respect to the machine body 3, and a urea water tank 47 is disposed in front of the machine body 3 and in front of the vertical axis 51. Thus, by opening the pretreatment unit 5, it becomes easy to access the periphery of the urea water tank 47, and the maintenance work of the urea water tank 47, the pump 49, the urea water supply pipe 46 and the like is reduced, and the urea water tank 47 It is possible to improve the peripheral cleaning workability.

  Since the DPF 39 is provided below the body 3 and on the body frame 13 and between the engine 12 and the grain tank 9, the dead space between the engine 12 and the grain tank 9 can be used effectively. Since the NOx purification device 45 is provided below the machine body 3 and on the machine frame 13 between the threshing device 7 and the grain tank 9, the dead space between the threshing device 7 and the grain tank 9 is effective. Available to: As a result, it is possible to use the parts of the conventional machine in which the DPF 39 and the NOx purification device 45 are not mounted, and it is possible to reduce new design costs, capital investment for producing new parts, and the like.

  Since the connection pipe 40 extends upward from the suction port of the DPF 39 and is connected to the upper part of the engine 12, the urea injected into the relay pipe 43 does not flow back and hardly reaches the engine 12. Therefore, the engine 12 can be prevented from being deteriorated by urea. Further, since the engine 12, the DPF 39, the NOx purification device 45, the urea water tank 47, and the like are arranged in the vicinity, the lengths of the connection pipe 40, the relay pipe 43, the urea water supply pipe 46, and the cooling circuit can be shortened. As well as improving the exhaust efficiency, it is possible to reduce the cost of parts and maintenance.

<Second Embodiment>
Next, a second embodiment of the present invention will be described with reference to FIGS. The combine 101 according to the second embodiment is different from the first embodiment only in the arrangement of the connection pipe 140, the DPF 139, the relay pipe 143, the NOx purification device 145, the urea water supply pipe 146, and the exhaust pipe 150. Since other configurations are the same, illustration of the same configuration as that of the first embodiment is omitted, or the same reference numerals are given to the drawings and description thereof is omitted.

  A DPF 139 and a NOx purification device 145 are provided on the machine body frame 13. The DPF 139 is disposed between the driver seat 11 and the Glen tank 9 in the front-rear direction, and the NOx purification device 145 is disposed between the driver seat 11 and the Glen tank 9 in the front-rear direction and above the DPF 139. Yes. The suction port of the DPF 139 is connected to the engine 12 by a connection pipe 140. The discharge port of the DPF 139 is connected to the suction port of the NOx purification device 145 through a relay pipe 143. The exhaust port of the NOx purification device 145 is connected to an exhaust pipe 150 provided toward the rear of the driver's seat 11. Further, a urea water tank (storage tank) 47 is connected to the relay pipe 143 that connects between the DPF 139 and the NOx purification device 145 via the pump 49 by the urea water supply pipe 146.

  Since the present embodiment is configured as described above, the dead space between the driver's seat 11 and the Glen tank 9 can be used effectively. As a result, it is possible to use the parts of the conventional machine in which the DPF 139 and the NOx purification device 145 are not mounted, and it is possible to reduce new design costs and capital investment for producing new parts.

  Further, since the engine 12, the DPF 139, the NOx purification device 145, the urea water tank 47, and the like are arranged in the vicinity, the length of the connection pipe 140, the relay pipe 143, the urea water supply pipe 146, the exhaust pipe 150, and the cooling circulation path As a result, the exhaust efficiency can be improved and the cost of parts and maintenance can be reduced.

1,101 Combine 3 Airframe 5 Pre-processing section 11 Driver's seat 12 Engine 29 Support section 34 Drive sprocket 36 Feed chain 45, 145 Purification device (NOx purification device)
47 Storage tank (urea water tank)
51 Shaft support (vertical axis)
61 Cover body 62 Heat shield plate 63 Supply port

Claims (6)

A driver's seat disposed at the front of the aircraft, an engine, a drive sprocket rotatably supported on the left of the aircraft, an endless feed chain wound around the drive sprocket, and a grain culm In a combine equipped with a pre-processing section for cutting
A purification device for purifying exhaust gas generated by the engine with a liquid reducing agent and a catalyst;
A storage tank having a liquid reducing agent supply port and storing the liquid reducing agent;
The replenishing port is disposed at the lower part of the feed chain, behind the front end of the feed chain and ahead of the drive sprocket.
Combine that is characterized by that. A support unit for supporting the pretreatment unit;
The support portion is formed in an arch shape so as to cover a part of the storage tank,
The combine according to claim 1. A heat shield is provided so as to be fixed to the support and disposed between the storage tank and the engine.
The combine according to claim 2. A cover body covering at least a part of the front portion of the storage tank is provided fixed to the support portion.
The combine according to claim 2 or 3. Provided to the support portion is a shaft support portion that supports the pretreatment portion so that it can be opened and closed horizontally.
The storage tank is arranged in front of the shaft support portion.
The combine of Claims 2 thru | or 4. The tip of the replenishing port is arranged so that at least a part thereof overlaps the feed chain in plan view.
The combine according to any one of claims 1 to 5.

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