JP7289250B2 - combine - Google Patents

Description

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

Conventionally, a pretreatment section is attached to a body frame provided with a traveling device so as to be vertically rotatable via a pretreatment column erected on the front left side, and transported culms are threshed and sorted behind the pretreatment section. A threshing section is mounted, a driving operation section and an engine are arranged on the right front portion, and an oil tank for storing hydraulic operating oil for a hydraulic operating mechanism driven by the engine is mounted on the frame body of the pretreatment column. Combines designed to be installed in spaces are already known. (For example, Patent Document 1)
In the combine shown in this document, a strainer installed in the piping between the oil tank and the hydraulic operating mechanism to filter the oil is piped at a position higher than the oil tank on the inner side of the fuselage deep behind the engine. It has a strainer installation structure.

Japanese Patent No. 4110087

In the combine disclosed in Patent Document 1, since the strainer is positioned deep inside the machine body, it is difficult to perform filter maintenance work such as inspection, cleaning, or replacement of the filter. However, there are drawbacks such as the fact that it is easy to contaminate a wide area, and it is difficult and complicated to remove and clean the spilled oil.
In addition, the strainer is installed at a high position in the middle of the long pipe from the oil tank to the hydraulic pump (gear pump) of the hydraulic operation mechanism, so the wiring structure such as pipe routing and strainer mounting support becomes complicated, resulting in high cost. There is also the problem of becoming
On the other hand, for this type of oil tank, when replacing the oil that has deteriorated due to long-term use, remove the screw plug from the drain port provided on the bottom wall of the tank, drain the deteriorated oil, and then drain the oil from the filler port. An oil change operation is performed to refuel with new oil, but this oil discharge operation is performed only from the drain port formed as a small diameter screw hole in the bottom wall of the tank, so it is a time-consuming task. At the same time, especially when the air temperature is low, the viscosity increases, so there is a problem that maintenance work becomes inefficient, such as requiring a longer time to drain the deteriorated oil.

In order to solve the above-mentioned problems, the present invention firstly mounts the pretreatment section 3 on the body frame 2 having the travel device 1a via the pretreatment column 11 erected on the front left side so as to be vertically rotatable. , a threshing unit 4 for threshing and sorting the culms transported from the culm transporter 3a is mounted behind the preprocessing unit 3, and an operation operation unit 6 and an engine 8 are arranged at the right front part, and the machine body The pretreatment struts 11 are erected in a rigid structure portion where the front portions of the left and right support-side frames 2c extending in the front-rear direction at the left front portion of the frame 2 are connected and reinforced by the front lateral frame 2a. 3 and in which an oil tank 10 containing oil for hydraulic operation of a hydraulic operation mechanism 9 driven from the engine 8 is installed on the side of the pretreatment column 11,
The front lateral frame 2a is arranged laterally in front of the oil tank 10, and a strainer base 12a attached and supported on the side of the body frame 2 and an oil filter can be replaced during piping between the hydraulic operating mechanism 9 and the oil tank 10. When the strainer 12 is installed at the lower front position of the oil tank 10, a mounting member 15 for mounting and fixing the oil tank 10 to the front horizontal frame 2a is provided. It is characterized in that the strainer base 12a of the strainer 12 is attached and supported to the attachment member 15 via the bracket portion 15d.
Secondly, the strainer 12 is installed at the lower front position of the oil tank 10 with the strainer container portion 12b directed outward to the left 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 with a front cover 20 so that it can be opened and closed .

According to the first aspect of the invention, the pretreatment section is attached to the body frame provided with the traveling device so as to be vertically rotatable via the pretreatment column erected on the front left side, and the pretreatment section is mounted behind the pretreatment section. A threshing unit for threshing and sorting the culms transported from the culm transporter is mounted, an operation control unit and an engine are arranged on the right front part, and the machine body frame extends in the front-rear direction on the left front part. The pretreatment struts are erected on a rigid structural portion where the front portions of the left and right strut-side frames are connected and reinforced by the front lateral frame to support the pretreatment section, and a hydraulic operation mechanism driven by the engine is hydraulically operated. In a combine harvester in which an oil tank containing oil for storage is installed on the side of the pretreatment column, the front horizontal frame is arranged horizontally in front of the oil tank, and is installed in the pipe between the hydraulic operation mechanism and the oil tank in the body frame. A strainer consisting of a strainer base attached to and supported on the side and a strainer container portion for housing an oil filter in a replaceable manner is provided. By fixing the mounting member to be mounted and fixed, and mounting and supporting the strainer base of the strainer to the mounting member via the bracket portion ,
With the strainer base fixed to the machine frame side, the strainer is installed in the lower front part 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 left outer side of the body frame while forming a wide space above the body frame, a simple and inexpensive wiring structure can be achieved.
In addition , since the hand can be easily and freely inserted from the outside of the wide space formed between the lower rear portion of the pretreatment section and the oil tank, the oil filter can be replaced and the structure of the strainer can be used. It is possible to efficiently and easily perform maintenance work such as draining oil in an oil tank.
Further, by mounting and supporting the strainer base of the strainer to the mounting member provided on the body frame side for mounting and fixing the oil tank via the bracket portion,
The strainer is installed by using a mounting member for mounting and fixing the oil tank, which is manufactured in advance with a rigid structure on the front lower side of the oil tank, and is installed by providing a bracket part, so that the mounting structure of the strainer is simple and inexpensive. In addition, the durability against vibrations and the like during running can be enhanced. Therefore, according to the above-described strainer installation structure, the pretreatment column is erected at a rigid structural portion where the front portions of the left and right column-side frames extending from the left front portion of the body frame are connected and reinforced by the front lateral frame. In addition to stably supporting the pretreatment section, the front horizontal frame is arranged laterally on the front side of the oil tank. It can be used as such, and has the advantage of simplifying the mounting structure of both and facilitating maintenance work.
According to the second aspect of the invention, the strainer is installed at the lower front position of the oil tank in a sideways posture with the strainer container portion facing outward to the left, and the oil tank and the strainer are arranged with a downward slope from the front. By being openable and closable with a front cover having
Since the strainer is installed on the lower side of the front surface of the oil tank, both can be covered continuously from the front by the front cover having a front cover surface with a downward slope without narrowing the maintenance work space in the space in front of the strut. In addition, the front cover surface of the front cover having a downward slope allows dust such as straw scraps and dust falling from above to slide down without accumulating on the front cover surface.
In addition , in the maintenance work space formed by opening the front cover, the strainer container portion in a sideways posture can be exposed outward to the left at the lower front side position of the oil tank. It is easy to remove the container part and to prepare for oil collection such as the oil guide and collection container, and the oil in the oil tank can be properly discharged from the strainer base delivery port, so it can be discharged from the drain port. In combination with this, the oil recovery work can be performed efficiently and smoothly .

It is a left view of a combine. It is a top view of a combine. Fig. 3 is an internal front perspective view of the essential parts of the front part of the fuselage showing the oil tank and the strainer. FIG. 4 is a front perspective view of essential parts of the front part of the fuselage showing a state in which the oil tank and the strainer part of FIG. 3 are covered with a front cover; FIG. 4 is a main part side view of the front part of the fuselage showing an oil tank and a strainer part; Fig. 2 is a front view of the essential parts of the front part of the fuselage showing the oil tank and the strainer. Fig. 7 is a front right perspective view of the front part of the fuselage showing the oil tank and strainer portion of Fig. 6; FIG. 2 is a hydraulic piping diagram showing an outline of a control valve, a travel HST, a transport HST, a strainer, etc. of a hydraulic actuation mechanism;

One embodiment of the present invention will be described based on the drawings. First, the basic structure of a combine harvester 1 employing the present invention will be described with reference to FIGS. 1 and 2. FIG. This combine harvester 1 has a pre-processing unit 3 for cutting multiple rows mounted on the front left side of a body frame 2 equipped with a crawler-type traveling device 1a so as to be vertically rotatable. A threshing unit 4 is mounted for receiving the transported culms from the transport body 3a to the feed chain 4a and threshing them.
At the right front part of the body frame 2, a driving operation unit 6 is arranged, and at the rear, a grain tank 7 for storing grains threshed and sorted by the threshing unit 4 is installed.

In this configuration, the engine 8 mounted below the seat 6a of the driving operation unit 6 protrudes the engine output shaft toward the left side (the threshing unit 4 side), and the hydraulic operating mechanism 9 shown in FIG. 8 extends from the output shaft. , the hydraulic pump 9p is driven. This hydraulic actuation mechanism 9 uses a piping structure similar to that of a conventional one to supply oil supplied from a hydraulic pump 9p from an oil tank 10 containing hydraulic actuation oil via a control valve 9v. A traveling HST 9a as a device, a grain stalk transfer HST 9b that drives the stalk transfer body 3a at a variable speed, and actuators such as cylinders, clutches, etc. of various hydraulic operation units provided in various parts of the machine body are operated.

An oil tank 10 installed in a hydraulic operation mechanism 9 shown in the figure is a gate-shaped pretreatment column erected from the body frame 2 in front of the threshing section 4 and supporting the pretreatment section 3 so as to be vertically rotatable. The oil tank installation structure according to the present invention is installed in the space of the frame 11 for easy attachment and detachment, and the strainer 12 is installed on the lower front side of the oil tank 10 with a piping structure that facilitates maintenance work. .
In the pretreatment section 3, a horizontal case portion 3c of a pretreatment transmission case frame 3b, which is L-shaped in plan view and contains a horizontal transmission shaft and a vertical transmission shaft, is rotatably supported on the upper portion of the pretreatment 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 an elevation cylinder (not shown) provided in the hydraulic operating mechanism 9. As shown in FIG.

Here, the installation structure of the oil tank 10 and the hydraulic operating mechanism 9 will be described with reference to FIGS. 2 to 8. FIG. First, as shown in FIGS. 2 and 5, the oil tank 10 is a hollow box that can be inserted from the front into a square-shaped space defined by the gate-shaped pretreatment column 11 and the body frame 2. produced.
An oil supply port 10a made of an upward pipe is provided on the upper rear side of the box, and a drain port 10b having a screw plug is provided on the lower side (bottom wall) at a position close to the front side (front wall), and 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 supply port 10a on the rear surface of the box body. An oil check port 10e is provided to enable detection of the amount of oil.

The drain port 10b and the strainer port 10c are arranged in the lateral center of the oil tank 10 or on the left side, and are arranged as close to each other as possible, so that the oil can be drained with a simple and inexpensive structure as will be described later. make it easier.
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 through a predetermined oil distribution pipe 10h.
An inlet port 10d provided on the rear side of the oil tank 10 connects the inlet port and outlet port of the working machine hydraulic continuously variable transmission 9b through the working machine input oil pipe 9c and the working machine output oil pipe 9d. Each connected.

An inflow port of the strainer 12 and a strainer port 10c on the front side of the oil tank 10 are connected via a conval input pipe 12c, and the oil discharged from the strainer 12 flows into the gear pump 9p. The exhaust port of the gear pump 9p is connected to the inflow port of the control valve 9v via a Conval input pipe. A conval discharge pipe 9e of the control valve 9v is connected to the oil tank 10 via the grain culm transfer HST 9b. As a result, the gear pump 9p is driven to supply pressurized oil to the control valve 9v to operate the various hydraulic operating units provided at various parts of the machine body.

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. FIG. First, the illustrated oil tank 10 can be detachably attached and fixed in the frame space from the front by means of a tank mounting structure using a band 13 surrounding the right and left outer peripheries and bolts or the like.
That is, as shown in FIGS. 3, 5, and 6, this tank mounting structure is mounted on a front lateral frame 2a as a structural member on which a pretreatment column 11 is erected in the left front portion of the body frame 2 by a structure described later. On the other hand, a mounting member 15 to which adjustment bolts 13a provided at the front lower ends of the left and right bands 13 are inserted and mounted, and a rear lower end of both bands 13 are attached to the rear horizontal frame 2b horizontally provided behind the front horizontal frame 2a. is mounted by inserting a fixing bolt 13b. The front horizontal frame 2a connects and reinforces the left and right support-side frames 2c extending at the left-hand front portion of the body frame 2 with a support-support spacing.

In this tank mounting structure, the fixing bolts 13b of the left and right bands 13 are fixed to the rear horizontal frame 2b, then the middle portion of the band is wound around the upper portion of the tank, and then the adjusting bolts 13a are attached to the front horizontal frame 2a. By adjusting the insertion into the mounting member 15 positioned above, the oil tank 10 can be stably mounted and fixed to the body frame 2 side by tightening the band 13 .
The installation and fixing work of the oil tank 10 can be performed with the pretreatment section 3 raised to the maximum or with the pretreatment section 3 removed from the pretreatment column 11. The removal work of the oil tank 10 is performed in reverse order. can be easily done by

As shown in FIG. 5, the mounting member 15 is formed in a U-shape in side view by the upper and lower adjusting bolt mounting pieces 15a, the frame mounting pieces 15b, and the standing wall 15c between them. Inside, a bracket portion 15d for detachably mounting and supporting the strainer 12 can be detachably fixed to the front horizontal frame 2a in a protruding posture that overlaps the frame mounting piece 15b toward the front.
On the other hand, the strainer 12 includes a strainer base (mounting body) 12a detachably attached to the bracket 15d side, and a strainer container portion 12b detachably fitted to the strainer base 12a and housing an internal oil filter in a replaceable manner. It has a general-purpose strainer structure consisting of

With this arrangement, the strainer can be stably installed in a compact sideways position with the strainer base 12a attached and fixed to the bracket 15d side, with the strainer container portion 12b directed toward the outer side of the machine body in a front view without increasing the vertical height. can be installed.
Moreover, the strainer 12 is not provided at a deep position inside the machine body as in the conventional strainer, but can be arranged at a front lower position of the oil tank 10 through the bracket portion 15d and collectively adjacent to the machine body frame 2 side. Therefore, it can be arranged on the right outer side of the body frame 2 while forming a wide space above the strainer 12, and a simple and inexpensive wiring structure with a short piping distance can be achieved.

Further, the strainer 12 having the installation structure described above is installed on the bracket portion 15d using the mounting member 15 for mounting and fixing the oil tank, which is manufactured in advance with a rigid structure and provided on the lower front side of the oil tank. can be made simple and inexpensive, and the durability against vibrations and the like during running can be enhanced.
Furthermore, since a hand can be easily and freely inserted from the outside of the wide space formed between the lower rear portion of the pretreatment section 3 and the oil tank 10, the oil filter can be replaced and the inside of the oil tank 10 can be easily removed. As will be described later, maintenance work such as oil change can be performed efficiently.

The strainer 12 can be installed at an oil discharging position near the installation position of the drain port 10b provided on the bottom wall of the oil tank 10 in a front view. Since the oil discharge positions can be made substantially the same when viewed from the front, the oil collection container, the oil guide, etc., which are prepared individually or separately, can be placed at substantially the same position, so that the oil discharge work can be easily performed at the same time and the oil can be collected efficiently. can do
According to the strainer installation structure, the front portions of the left and right support-side frames 2c extending from the left front portion of the body frame 2 are connected and reinforced by the front lateral frame 2a. to stably support the pretreatment section 3, and the front horizontal frame 2a is arranged laterally in front of the oil tank 10, so that the oil tank 10 can be fixed to the body frame 2 and the strainer 12 can be stably fixed. It can be used as a mounting member for mounting and supporting, and also as a dual-purpose part, and has the advantage of simplifying the mounting structure of both and facilitating maintenance work.
The installation means of 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 also, various maintenance work can be performed in the same manner.

On the other hand, in the configuration shown in the figure, the inlet side of the strainer base 12a is connected to the strainer port 10c protruding from the front wall of the oil tank 10 at a position close to the drain port 10b. (Conval input pipe) 12c is detachably connected.
In the strainer installation structure with this configuration, when the oil in the tank is drained, the oil is drained from the drain port 10b. It is possible to do so.

The oil tank 10 and the strainer 12 constructed as described above are covered from the front so as to be openable and closable by a front cover 20 constructed using the structure of the pretreatment column 11, so that the oil tank 10 can be attached and detached, and maintenance of the strainer 12 and the like can be performed. It has a front cover structure that facilitates work.
That is, in this front cover structure, the pretreatment struts 11 serving as the attachment frame of the front cover 20 are arranged below the culm conveying body 3a of the pretreatment section 3 and the threshing section 4 by the same structure as the conventional one. main struts 11a erected in a pair on the left and right at a predetermined position on the left front part of the body frame 2 at a position of the front space formed between the front part of the machine body frame 2 and having an accommodation space for the oil tank 10; It consists of a front strut 11b that is joined to the upper part of the main strut 11a and erected in a forward inclined stay posture, and an upper connecting frame 11c that connects the upper parts of the left and right main struts 11a. The horizontal case portion 3c of the pretreatment transmission case frame 3b is attached and supported.

The gate-shaped pretreatment strut 11 projects a cover bracket 22 which is inscribed in a rectangular bowl-shaped front cover 20 and which can be bolted to an appropriate position on the front side of the upper connecting frame 11c and the left and right front struts 11b. are set up.
In this configuration, the front cover 20 is composed of a flat square front cover surface 20a and a peripheral wall 20b with the lower side open from the outer periphery thereof. The front cover surface 20a has a box-like shape with a slope substantially the same as the slope of the front strut 11b when viewed from the side.

The front cover 20 is composed of the front side of the oil tank 10 which is inserted into the inner space of the pretreatment column 11 and is in an upright posture, and the strainer container portion 12b which is placed at the lower front portion of the oil tank 10 in a sideways posture facing left outward. Since the strainer 12 to be attached can be compactly covered with an inclined posture that brings the front cover surface 20a as close as possible from the front so as not to protrude forward greatly, the maintenance work of the space in front of the support column is reduced. The pretreatment unit 3 can be moved up and down without any trouble while covering it continuously without narrowing the space.
In addition, according to the front cover structure, dust such as straw scraps and dust falling from above during the work of transporting grain culms slides down without accumulating due to the slope of the front cover surface 20a of the front cover 20 having a downward slope. There are advantages such as being able to

Next, a mode of filter replacement work for the strainer 12 will be described as maintenance work for the combine having the installation structure of the oil tank 10 and the strainer 12 configured as described above.
In this case, first, by loosening the bolts and removing the front cover 20, the front of the oil tank 10 is wide open to expose the strainer 12 in a sideways posture, so that the operator can move the left side of the column front space. The strainer container portion 12b can be quickly removed from the strainer base 12a in a one-touch manner by inserting a hand into the maintenance work space portion from the outside.

Next, the operator mounts the strainer container portion 12b, which has been replaced with a filter outside the machine body, to the strainer base 12a in reverse order, and reassembles the front cover 20, thereby performing a series of filter replacements. You can complete your work efficiently and smoothly.
Note that the front cover 20 is not limited to a single continuous shape, but may be divided into upper and lower parts so that maintenance work can be facilitated by removing only the lower cover. A cover mode may be employed in which an openable and closable lid cover is provided on the lower side of the front cover 20 to facilitate maintenance work.

Next, a mode of oil change maintenance work for changing oil will be described. In this case, it is common that the crawler belts of the traveling device 1a are arranged as desired immediately below the drain port 10b. Therefore, the operator temporarily places the oil recovery container on the ground above or outside the crawler belt, and then moves the gutter-shaped oil guide from directly below the drain port 10b above the oil recovery container to an inclination that allows the oil to flow down. After preparing for installation with a corner, the screw plug is removed from the drain port 10b to open it.
As a result, the oil discharged from the drain port 10b is guided downward 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, oil is supplied from the oil supply port 10a to complete a series of oil replacement maintenance work.

On the other hand, in this installation structure of the oil tank 10 and the strainer 12, the strainer 12 is provided at the front lower position of the oil tank 10 in a sideways posture with the strainer container portion 12b directed outward to the left. 12 is openable and closable from the front with a front cover 20 having a downward sloping surface, so that the oil can be easily and smoothly discharged and recovered from the strainer 12 side if necessary. The degraded oil with low viscosity and high viscosity can be discharged quickly and in a short time, and the problems in the conventional oil change work can be solved.

That is, in this case, when the front cover 20 is removed, the front portion of the strainer 12 and the oil tank 10 can be exposed for maintenance work. By inserting a hand into this maintenance work space, the oil guide is placed under the strainer base 12a of the strainer 12 in advance, and an oil collection container is prepared under the end of the oil guide. This is done by removing the strainer container portion 12b from the base 12a.
Since the oil in the oil tank 10 can be easily dropped from the delivery port 12d of the strainer base 12a, the oil recovery work by this is complicated work such as removing the connecting pipe 12c from the tank side or the strainer base side. The falling oil can be rapidly discharged and recovered into the oil recovery container in the same manner as the drain port 10b.

Therefore, the oil can be drained from the strainer base 12a until the strainer port 10c is brought close to the drain port 10b, and the oil can be drained. At the same time as discharging from the drain port 10b, or in advance, the discharging work can be efficiently performed.
In addition, since the deteriorated oil in the full state in the oil tank 10 enters a bypass discharge state from the strainer 12 side, the momentum at the time of discharging the oil from the drain port 10b due to its own weight is weakened. It is characterized by being able to suppress troubles.

The installation structure of the oil tank 10 and the strainer 12 that enables the oil draining work to be performed according to the above work mode is not limited to the oil draining mode described above. Alternatively, the strainer 12 can be installed vertically with the strainer container portion 12b facing downward.
Further, the strainer 12 may be provided with a switching valve on the inlet side of the strainer base 12a. In this case, the oil discharge timing can be freely adjusted by opening and closing the switching valve. Furthermore, if a similar switching valve is provided for the strainer port 10c, it is possible to efficiently discharge the oil with the strainer 12 removed while freely adjusting the timing and amount of oil discharge. .

Reference Signs List 1 Combine 1a Traveling device 2 Body frame 2a Front horizontal frame 3 Pretreatment unit 3a Grain culm carrier 4 Threshing unit 6 Driving operation unit 8 Engine 9 Hydraulic operating mechanism 10 Oil tank 11 Pretreatment column 12 Strainer 12a Strainer base 12b Strainer container 15 mounting member 15d bracket portion 20 front cover

Claims (2)

A pretreatment section (3) is vertically and rotatably attached to a body frame (2) having a travel device (1a) through a pretreatment column (11) erected on the front left side, and the pretreatment section ( A threshing unit (4) for threshing and sorting the culms transported from the culm transporter (3a) is mounted behind 3), and an operation control unit (6) and an engine (8) are installed in the right front part. Then, the front parts of the left and right pillar-side frames (2c) extending in the front-rear direction at the left front part of the body frame (2) are connected and reinforced by the front lateral frames (2a). An oil tank (10) for supporting the pretreatment section (3) by erecting a treatment column (11) and containing oil for hydraulic operation of a hydraulic operation mechanism (9) driven by the engine (8) is provided as described above. In the combine installed on the pretreatment column (11) side,
The front lateral frame (2a) is arranged laterally in front of the oil tank (10), and is mounted and supported on the body frame (2) side in the piping between the hydraulic operating mechanism (9) and the oil tank (10). A strainer (12) consisting of a strainer base (12a) and a strainer container (12b) that replaceably accommodates an oil filter is disposed , and the strainer (12) is installed at a lower front position of the oil tank (10). In doing so, a mounting member (15) for mounting and fixing the oil tank (10) is fixed to the front horizontal frame (2a), and the strainer base (12a) of the strainer (12) is attached to the mounting member (15). and a bracket portion (15d) for mounting and supporting the combine. The strainer (12) is installed at the lower front position of the oil tank (10) with the strainer container portion (12b) directed outward to the left and in a sideways posture, and the oil tank (10) and the strainer (12) are separated from each other. 2. A combine according to claim 1, which is openable and closable covered from the front by a front cover (20) having a downward slope.

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