JP2021061752A - combine - Google Patents

Abstract

To provide a combine which makes a routing structure simple and inexpensive while forming a wide space above a strainer attached to an oil tank side, and facilitates exchange of an oil tank and maintenance work such as oil discharge in an oil tank which is performed by using the structure of the strainer.SOLUTION: A combine is configured so that: a strainer 12 formed of a strainer base 12a fitted and supported to a machine body frame 2 side, and a strainer container part 12b storing an oil filter therein so as to be exchanged, is installed in a pipeline of an oil tank 10 installed on a pretreatment pole 11 to which a pretreatment part 3 is supported in a vertically movable and rotatable manner and a hydraulic pressure actuation mechanism 9; the strainer 12 is installed on a front lower side position of the oil tank 10; and the oil tank 10 and the strainer 12 are openably/closably covered with a front part cover 20 having a slant face downward from a front side.SELECTED DRAWING: Figure 3

Description

The present invention relates to an installation structure of an oil tank and a strainer in a combine harvester.

Conventionally, a pretreatment section is rotatably mounted on an airframe frame provided with a traveling device via a pretreatment column erected on the left front portion, and a transport grain culm is threshed and sorted behind the pretreatment section. A threshing unit is mounted, an operation operation unit and an engine are arranged on the right front part, and an oil tank for accommodating hydraulic operation oil of a hydraulic operation mechanism driven from the engine is provided in the frame frame of the pretreatment column. Combines that are designed to be installed in the space are already known. (For example, Patent Document 1)
The combine shown in this document pipes a strainer installed in the piping between the oil tank and the hydraulic actuation mechanism to filter the oil at a position higher than the oil tank on the deep inside of the machine behind the engine. The structure is such that the strainer is installed.

Japanese Patent No. 4110087

In the combine shown in Patent Document 1, since the strainer is located on the inner back side of the machine body, it is difficult to perform filter maintenance work such as inspection and cleaning or replacement of the filter, and oil spilling from a high position during the work is around. It has the disadvantages that it is easy to stain widely, and it is difficult to remove and clean the spilled oil, which makes it complicated.
In addition, since the strainer is installed at a high position in the middle of the long piping from the oil tank to the hydraulic pump (gear pump) of the hydraulic operation mechanism, the arrangement structure such as piping routing and strainer mounting support becomes complicated and costly. There is also the problem of becoming.
On the other hand, in this type of oil tank, when replacing oil that has deteriorated due to long-term use, the oil discharge work is performed by removing the screw plug from the drain port provided on the bottom wall of the tank to discharge the deteriorated oil, and then from the oil filler port. Oil change work to refuel new oil is performed, but this oil discharge work is a time-consuming work because oil is discharged only from the drain port formed as a small diameter screw hole in the bottom wall of the tank. At the same time, since the viscosity becomes high especially when the temperature is low, there is a problem that the maintenance work becomes inefficient, for example, it takes a longer time to discharge the deteriorated oil.

In order to solve the above problems, firstly, in the present invention, the pretreatment unit 3 is rotatably mounted on the body frame 2 provided with the traveling device 1a via the pretreatment support column 11 erected on the left front part. A threshing unit 4 for threshing and sorting the grain culms transported from the combine harvester 3a is mounted behind the pretreatment unit 3, and an operation operation unit 6 and an engine 8 are arranged on the right front portion of the engine. In the combine in which the oil tank 10 for accommodating the oil for hydraulic operation of the hydraulic operation mechanism 9 driven from 8 is installed on the pretreatment column 11 side.
In the piping between the hydraulic operation mechanism 9 and the oil tank 10, a strainer 12 including a strainer base 12a attached and supported on the machine frame 2 side and a strainer container portion 12b for replaceably accommodating an oil filter is arranged. The strainer 12 is installed at a lower position on the front side of the oil tank 10.
Secondly, the strainer 12 is installed at a lower position on the front side of the oil tank 10 with the strainer container portion 12b facing left outward in a sideways posture, and the oil tank 10 and the strainer 12 have a downward slope from the front. It is characterized in that it is covered by a front cover 20 so that it can be opened and closed.
Thirdly, the strainer base 12a of the strainer 12 is mounted and supported on a mounting member 15 provided on the machine frame 2 side to mount and fix the oil tank 10 via a bracket portion 15d.

According to the invention of claim 1, the pretreatment section is rotatably mounted on the machine frame provided with the traveling device via the pretreatment column erected on the left front portion, and behind the pretreatment section. An oil for hydraulic operation of a hydraulic operation mechanism driven from the engine is equipped with a threshing unit that threshs and sorts the grain transported from the grain carrier, and an operation operation unit and an engine are arranged on the front right side. In the combine where the oil tank for accommodating the oil tank is installed on the pretreatment column side, the strainer base and the oil filter which are mounted and supported on the body frame side are exchangeably accommodated in the piping between the hydraulic operation mechanism and the oil tank. By arranging the strainer consisting of the parts, the strainer is installed at the lower position on the front side of the oil tank.
The strainer base is attached and fixed to the fuselage frame side at the lower front side of the oil tank installed in the space between the lower rear part of the pretreatment part and the pretreatment column erected on the front side of the threshing part. Since it can be arranged on the right outer side of the airframe frame while forming a wide space above the airframe, a simple and inexpensive arrangement structure can be obtained.
In addition, since the hand can be easily and freely inserted from the outside of the wide space formed between the lower part of the rear part of the pretreatment part and the oil tank, the oil filter can be replaced and the strainer structure can be used. It is possible to efficiently and easily perform maintenance work such as discharging oil in the oil tank.
According to the invention of claim 2, the strainer is installed at the lower front position of the oil tank with the strainer container portion facing left outward in a sideways posture, and the oil tank and the strainer are placed on a downward slope from the front. By covering it with a front cover that can be opened and closed
Since the strainer is installed on the lower side in front of the oil tank, both are covered in a series without narrowing the maintenance work space part of the support column front space part by the front cover having the front cover surface of the slope facing downward from the front. In addition, dust such as straw dust and dust that falls from above during the grain transportation operation can be slid down without being accumulated by the front cover surface of the front cover having a downward slope.
In addition, in the maintenance work space formed by opening the front cover, the strainer container in a sideways posture can be exposed to the left outward at the lower front position of the oil tank, so that the strainer container can be exposed from the strainer base. Since it is possible to easily remove the part and prepare for oil recovery such as the oil guide and the recovery container, and the oil in the oil tank can be properly discharged from the outlet of the strainer base, it can be discharged from the drain port. Coupled with this, oil recovery work can be performed efficiently and smoothly.
According to the invention of claim 3, the strainer base of the strainer is attached and supported via a bracket portion to an attachment member provided on the machine frame side to attach and fix the oil tank.
The strainer is installed by providing a bracket part using a mounting member for mounting and fixing the oil tank, which is manufactured in advance by a rigid body structure on the lower front side of the oil tank, so that the strainer mounting structure is simple and inexpensive. At the same time, the durability against vibration during running can be improved.

It is a left side view of the combine. It is a plan view of a combine. It is a front perspective view inside the main part of the front part of the fuselage which shows an oil tank and a strainer part. It is a front perspective view of the main part of the front part of the fuselage which shows the state which covered the oil tank and the strainer part of FIG. 3 with the front cover. It is a side view of the main part of the front part of the fuselage which shows an oil tank and a strainer part. It is a front view of the main part of the front part of the fuselage which shows an oil tank and a strainer part. It is a right front perspective view of the front part of the machine body which shows the oil tank and the strainer part of FIG. It is a hydraulic piping diagram which shows the outline of the control valve of a hydraulic operation mechanism, a traveling HST, a transporting HST, a strainer and the like.

An embodiment of the present invention will be described with reference to the drawings. First, the basic structure of the combine 1 adopting the present invention will be described with reference to FIGS. 1 and 2. In this combine 1, a pretreatment unit 3 for multi-row cutting is mounted on the left side of the front portion of the machine frame 2 provided with the crawler type traveling device 1a so as to be able to move up and down, and the grain culm of the pretreatment unit 3 is mounted behind the pretreatment unit 3. It is equipped with a threshing unit 4 that inherits the transported grain culms from the transport body 3a to the feed chain 4a and performs threshing processing.
Further, a driving operation unit 6 is arranged on the front right side of the machine frame 2, and a grain tank 7 for storing the grains sorted by the threshing unit 4 is installed behind.

In this configuration, the engine 8 mounted below the seat 6a of the driving operation unit 6 projects an engine output shaft toward the left side (threshing unit 4 side), and the hydraulic operation mechanism 9 shown in FIG. 8 is projected from this output shaft. The hydraulic pump 9p of the above is driven. This hydraulic actuating mechanism 9 has a piping structure similar to that of a conventional one, and the oil supplied by the hydraulic pump 9p from the oil tank 10 accommodating the oil for hydraulic actuation is transferred to the work machine hydraulic stepless speed change via the control valve 9v. The traveling HST 9a as a device, the grain transport HST9b for shifting and driving the grain transport body 3a, and actuators such as cylinders and clutches of various hydraulic actuation units arranged in various parts of the machine are operated.

The oil tank 10 installed in the hydraulic operation mechanism 9 shown in the figure is a gate-shaped pretreatment column that is erected from the machine frame 2 at the front of the threshing section 4 and supports the pretreatment section 3 so as to be able to move up and down. In the space of the frame body of 11, the oil tank installation structure according to the present invention makes it easy to attach / detach, and the strainer 12 is installed on the lower front side of the oil tank 10 by a piping structure that facilitates maintenance work. ..
The pretreatment unit 3 rotatably mounts and supports the horizontal case portion 3c of the pretreatment transmission case frame 3b having an L-shape in a plan view in which the horizontal transmission shaft and the vertical transmission shaft are built on the pretreatment support column 11. In this state, the front side of the pretreatment transmission case frame 3b can be moved up and down by the operation of the elevating cylinder (not shown) provided in the hydraulic operation mechanism 9.

Here, the installation structure of the oil tank 10 and the hydraulic operation mechanism 9 will be described with reference to FIGS. 2 to 8. First, as shown in FIGS. 2 and 5, the oil tank 10 is formed as a hollow box body that can be inserted from the front into the front-viewing space formed by the gate-shaped pretreatment column 11 and the airframe frame 2. It will be produced.
An oil filler port 10a made of an upward pipe is provided on the upper side of the rear surface of the box body, and a drain port 10b having a screw plug is provided on the lower surface side (bottom wall) at a position close to the front side (front wall). A strainer port 10c connected to the strainer 12 is projected forward at a position close to the drain port 10b on the lower side of the front wall, and a screw plug is provided on the lower side close to the oil filler port 10a on the rear surface of the box body. An oil inspection port 10e is provided to enable detection of the amount of oil.

The drain port 10b and the strainer port 10c are arranged at the center of the left and right sides of the oil tank 10 or to the left, and the two are placed as close as possible to each other so that the oil can be discharged with a simple and inexpensive configuration as described later. Make it easier to do.
An oil inlet / outlet port 10d is provided on the front surface of the oil tank 10, and is connected to the work machine hydraulic continuously variable transmission 9a by a predetermined oil distribution pipe 10h.
Further, in the inlet / discharge port 10d provided on the back side of the oil tank 10, the inflow port and the discharge port of the work machine hydraulic continuously variable transmission 9b are interposed via the work machine input oil pipe 9c and the work machine output oil pipe 9d. Each is connected.

Further, the inflow port of the strainer 12 and the strainer port 10c on the front side of the oil tank 10 are connected via the conval input pipe 12c, and the oil discharged from the strainer 12 flows into the gear pump 9p. The discharge port of the gear pump 9p is connected to the inflow port of the control valve 9v via the control input pipe. Further, the control discharge pipe 9e of the control valve 9v is connected to the oil tank 10 via the grain culm transport HST 9b. As a result, pressure oil is supplied to the control valve 9v by driving the gear pump 9p, and the various hydraulic actuating parts arranged in various parts of the machine body are operated.

Next, the installation structure of the oil tank according to the present invention will be described in detail with reference to FIGS. 2 to 7. First, the illustrated oil tank 10 is detachably mounted and fixed in the frame space from the front by a tank mounting structure using a band 13 surrounding the left and right outer circumferences and bolts or the like.
That is, as shown in FIGS. 3, 5, and 6, this tank mounting structure is formed on the front horizontal frame 2a as a structural member in which the pretreatment support column 11 is erected in the front left portion of the airframe frame 2 according to the configuration described later. On the other hand, with respect to the mounting member 15 for inserting and mounting the adjusting bolts 13a provided at the front lower ends of the left and right bands 13 and the rear horizontal frame 2b horizontally installed behind the front horizontal frame 2a, the rear lower ends of both bands 13 It is composed of a mounting member 16 or the like to which the fixing bolt 13b is inserted and mounted. The front horizontal frame 2a connects and reinforces the left and right strut-side frames 2c extending at the left front portion of the airframe frame 2 with a strut spacing.

In the tank mounting structure according to this, the fixing bolts 13b of the left and right bands 13 are fixed to the rear horizontal frame 2b, then the middle part of the band is wound around the upper part of the tank, and then the adjusting bolt 13a is attached to the front horizontal frame 2a. When the oil tank 10 is inserted and adjusted to the mounting member 15 located above, the oil tank 10 can be stably mounted and fixed to the machine frame 2 side by tightening the band 13.
The installation and fixing work of the oil tank 10 can be performed with the pretreatment unit 3 raised to the maximum or the pretreatment unit 3 can be removed from the pretreatment support column 11, and the removal work of the oil tank 10 operates in the reverse order. Can be easily done by.

Then, as shown in FIG. 5, the mounting member 15 is formed in a U-shape in a side view by the upper and lower adjusting bolt mounting pieces 15a, the frame mounting piece 15b, and the standing wall 15c between them, and this U-shaped space is formed. Inside, a bracket portion 15d that detachably attaches and supports the strainer 12 can be detachably fixed to the front lateral frame 2a in a protruding posture in which the strainer 12 is detachably attached and supported on the frame attachment piece 15b.
On the other hand, the strainer 12 has a strainer base (mounting body) 12a that is detachably attached to the bracket 15d side and a strainer container portion 12b that is detachably fitted to the strainer base 12a and houses an internal oil filter in a replaceable manner. It has a general-purpose strainer structure consisting of.

As a result, the strainer installation structure is stable while the strainer base 12a is mounted and fixed on the bracket 15d side, and the strainer container portion 12b is oriented toward the outside of the machine body and is in a compact horizontal posture that does not increase the vertical height when viewed from the front. Can be installed.
Further, the strainer 12 is not provided at a deep position in the inner part of the machine body as in the conventional one, but is provided so as to face the lower front position of the oil tank 10 via the bracket portion 15d and to be collectively provided close to the machine frame 2 side. Therefore, it is possible to dispose of it on the right outer side of the airframe frame 2 while forming a wide space above the strainer 12, and it is possible to form a simple and inexpensive arrangement structure with a short piping distance.

Further, since the strainer 12 having the above installation structure is installed in the bracket portion 15d using the mounting member 15 for mounting and fixing the oil tank, which is manufactured in advance by a rigid body structure and is provided on the lower front side of the oil tank, the mounting structure of the strainer 12 is provided. It has advantages such as being able to have a simple and inexpensive configuration and being able to improve durability against vibration during running.
Further, since the hand can be easily and freely inserted from the outside of the wide space formed between the lower part of the rear portion of the pretreatment portion 3 and the oil tank 10, the oil filter can be replaced and the inside of the oil tank 10 can be inserted. It creates various advantages such as enabling efficient maintenance work such as oil change as described later.

Then, the strainer 12 can be arranged at an oil discharge work position close to the installation position of the drain port 10b provided on the bottom wall portion of the oil tank 10 in the front view. In this case, both of them. Since the oil discharge position can be made almost the same when viewed from the front, it is easy to perform the oil discharge work at the same time and efficiently collect the oil in one or separately prepared oil recovery containers, oil guides, etc. at the same position. Can be done.
Further, according to the installation structure of the strainer, the pretreatment support column 11 is attached to the rigid body structure portion where the front parts of the left and right support column side frames 2c extending in the left front part of the airframe frame 2 are connected and reinforced by the front horizontal frame 2a. The front horizontal frame 2a is arranged sideways on the front side of the oil tank 10, so that the oil tank 10 can be fixed to the machine frame 2 and the strainer 12 can be stably fixed. It can also be used as a mounting member that supports mounting, and has the advantage of facilitating maintenance work while simplifying the mounting structure of both.
The strainer 12 is not limited to the above configuration, and the strainer 12 may be detachably attached to the bracket portion 15d directly provided on the oil tank 10 on the body frame 2 side. In this case as well, various maintenance operations can be performed in the same manner.

On the other hand, in the configuration of the illustrated example, the inlet side of the strainer base 12a is a connecting pipe having flexibility with respect to the strainer port 10c projecting from the front wall of the oil tank 10 at a position close to the drain port 10b. (Conval input tube) Detachable and connected via 12c.
In the strainer installation structure with this configuration, during the drain work for draining the oil in the tank, while draining from the drain port 10b, the draining work from the strainer port 10c is performed at the same time by removing the connecting pipe 12c if necessary. I also make it possible to do it.

The oil tank 10 and the strainer 12 having the above configuration are covered with the front cover 20 configured by utilizing the structure of the pretreatment column 11 so as to be openable and closable from the front, and the oil tank 10 can be attached and detached and the strainer 12 and the like can be maintained. It has a front cover structure that facilitates work.
That is, in this front cover structure, the pretreatment column 11 that serves as the mounting frame for the front cover 20 has the same configuration as that of the conventional one, and has the same structure as that of the conventional one. In the front space position formed between the front part of the airframe, the main columns 11a which are erected in pairs on the left and right with a storage interval of the oil tank 10 at a predetermined position on the left front part of the fuselage frame 2. The upper connecting frame 11c is composed of a front support 11b which is joined to the upper part of the main support 11a and is erected in a forward inclined stay posture, and an upper connecting frame 11c which connects the upper parts of the left and right main columns 11a. The lateral case portion 3c of the pretreatment transmission case frame 3b is mounted and supported.

The gate-shaped pretreatment support column 11 projects a cover bracket 22 inscribed in the square bowl-shaped front cover 20 at an appropriate position on the front side of the upper connecting frame 11c and the left and right front support columns 11b so that the cover bracket 22 can be bolted freely. It is set up.
In this configuration, the front cover 20 is composed of a flat square front cover surface 20a and a peripheral wall 20b whose lower side is open from the outer periphery thereof, and each facing wall surface is bolted to each cover bracket 22. The front cover surface 20a has a box shape having substantially the same slope as the slope of the front support column 11b when viewed from the side.

As a result, the front cover 20 is in a sideways posture in which the strainer container portion 12b is directed to the left outward at the front side of the oil tank 10 which is inserted into the inner space of the pretreatment support column 11 and is in an upright posture and at the lower front position thereof. Since the strainer 12 to be attached can be compactly covered with the front cover surface 20a as close as possible from the front in an inclined posture that does not project significantly forward, maintenance work for the space in front of the column is performed. The up / down operation of the pretreatment unit 3 can be performed without any trouble while covering the space in a series without narrowing the space.
Further, according to the front cover structure, dust such as straw dust and dust falling from above during the grain transport operation slides down without being accumulated due to the inclination of the front cover surface 20a of the front cover 20 having a downward slope. There are advantages such as being able to.

Next, as a maintenance work of the combine including the installation structure of the oil tank 10 and the strainer 12 to be configured, the mode of the filter replacement work of the strainer 12 will be described.
In this case, if each bolt is first loosened and the front cover 20 is removed, the front of the oil tank 10 can be widely opened to expose the strainer 12 in the sideways posture, so that the operator can expose the strainer 12 in the sideways posture. By inserting a hand into the maintenance work space from the outside, the strainer container 12b can be quickly removed from the strainer base 12a in a one-touch manner toward the outside.

Next, the operator attaches the strainer container portion 12b whose filter has been replaced outside the machine body to the strainer base 12a by operating in the reverse order, and reassembles the front cover 20 to replace a series of filters. Work can be completed efficiently and smoothly.
The front cover 20 is not limited to a single series shape, but has a structure in which the front cover 20 is detachably divided into upper and lower parts, and only the lower cover can be removed to facilitate maintenance work. A cover mode may be provided in which an openable / closable lid cover is provided on the lower side of the front cover 20 to facilitate maintenance work.

Next, the mode of the oil change maintenance work for changing the oil will be described. In this case, the tracks of the traveling device 1a are generally arranged as desired directly under the drain port 10b. Therefore, the operator temporarily places the oil recovery container on the upper part of the track or on the outside of the track, and then tilts the gutter-shaped oil guide from directly below the drain port 10b above the oil recovery container to allow the oil to flow down. After preparing for installation with a corner, remove the screw plug from the drain port 10b and open it.
As a result, the oil discharged from the drain port 10b is guided down by the oil guide, and the entire amount of deteriorated oil can be recovered by the oil recovery container. Next, after closing the drain port 10b, refueling is performed from the refueling port 10a to complete a series of oil change maintenance work.

On the other hand, in the installation structure of the oil tank 10 and the strainer 12, the strainer 12 is provided at the lower front position of the oil tank 10 with the strainer container portion 12b facing left outward in a sideways posture, and the oil tank 10 and the strainer are installed. Since the 12 is covered with a front cover 20 having a downward slope from the front so that the oil can be easily and smoothly discharged and recovered from the strainer 12 side as necessary, for example, the temperature can be adjusted. It is possible to quickly and quickly discharge the deteriorated oil in a low and high viscosity state, and it is possible to solve the problems in the conventional oil change work.

That is, in this case, the oil discharge and recovery work from the strainer 12 side can be set to a suitable state for maintenance work in which the front parts of the strainer 12 and the oil tank 10 are exposed by removing the front cover 20 having the above configuration. Insert your hand into this maintenance work space, place the oil guide below the strainer base 12a of the strainer 12 in advance, and prepare the oil recovery container below the end of the oil guide. After performing the oil recovery preparation work, the strainer The strainer container portion 12b is removed from the base 12a.
The oil recovery work according to this is a complicated work such as removing the connecting pipe 12c from the tank side or the strainer base side because the oil in the oil tank 10 can be easily dropped from the outlet 12d of the strainer base 12a. The falling oil can be quickly discharged and recovered in the oil recovery container in the same manner as the drain port 10b.

Therefore, in the oil discharge and recovery work, the amount of oil up to the lowest possible level in which the strainer port 10c is brought close to the drain port 10b can be discharged from the strainer base 12a. The discharge work can be efficiently performed at the same time as the discharge from the drain port 10b or in a state in which the drain port 10b is preceded in advance.
Further, the deteriorated oil in the full state in the oil tank 10 is in a bypass discharge state from the strainer 12 side, so that the momentum at the time of discharge due to the oil's own weight from the drain port 10b is weakened, so that the discharged oil is discharged to the outside. It has the feature that troubles can be suppressed.

The installation structure of the oil tank 10 and the strainer 12 capable of performing the oil discharge work according to the above work mode is not limited to the oil discharge mode described above, and for example, when there is a margin space in front of and below the oil tank 10. The strainer 12 can be installed in a vertical posture with the strainer container portion 12b facing down.
Further, the strainer 12 may be provided with a switching valve on the inlet side of the strainer base 12a. In this case, the timing of oil discharge can be freely adjusted by opening and closing the switching valve. Further, if a similar switching valve is provided for the strainer port 10c, an advantage is created such that oil can be efficiently discharged with the strainer 12 removed while freely adjusting the timing and amount of oil discharge. ..

1 Combine 1a Traveling device 2 Machine frame 2a Front horizontal frame 3 Pretreatment part 3a Gram culm carrier 4 Threshing part 6 Operation operation part 8 Engine 9 Hydraulic operation mechanism 10 Oil tank 11 Pretreatment support 12 Strainer 12a Strainer base 12b Strainer container 15 Mounting member 15d Bracket part 20 Front cover

Claims (3)

The pretreatment section (3) is mounted on the machine frame (2) provided with the traveling device (1a) via the pretreatment column (11) erected on the left front portion so as to be vertically rotatable, and the pretreatment section (1a) is mounted. A threshing unit (4) for threshing and sorting the culms transported from the combine harvester (3a) is mounted behind the 3), and an operation operation unit (6) and an engine (8) are arranged in the front right side. Then, in the combine in which the oil tank (10) for accommodating the hydraulic operation oil of the hydraulic operation mechanism (9) driven from the engine (8) is installed on the pretreatment column (11) side.
In the piping between the hydraulic operation mechanism (9) and the oil tank (10), a strainer base (12a) that is mounted and supported on the body frame (2) side and a strainer container portion (12b) that interchangeably accommodates an oil filter. A combine comprising a strainer (12), wherein the strainer (12) is installed at a lower position on the front side of an oil tank (10). The strainer (12) is installed at the lower front position of the oil tank (10) with the strainer container (12b) facing left outward in a sideways posture, and the oil tank (10) and the strainer (12) are installed. The combine according to claim 1, wherein the combine is covered with a front cover (20) having a downward slope from the front so as to be openable and closable. The strainer base (12a) of the strainer (12) is mounted and supported on a mounting member (15) provided on the machine frame (2) side to mount and fix the oil tank (10) via a bracket portion (15d). The combine according to claim 1 or 2.

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