JP2006335086A - Working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein mud hits the lower part of a transmission or the like to increase a traveling resistance. <P>SOLUTION: In a working vehicle, a traveling device 4 is provided under a machine body frame 1, and the traveling device is constituted to correct the right and left inclination with respect to the traveling direction by a vehicle body horizontal mechanism L which elevates the vehicle height of the machine body frame 1 by elevating any one of the right and left traveling frame 6 in approximately parallel to the machine body frame 1. The inclination angle relative to the travel surface of an oblique crawler part 18 positioned between the first tracker roller 7 of the forefront position among a plurality of tracker rollers 7, and a drive wheel 8 is approximately same as the inclination angle of respective oblique crawler part 18 of the right and left crawlers 10 when the vehicle height of the machine body frame 1 is lowered to the lowest position by the vehicle body horizontal mechanism L. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a working vehicle, particularly a combine traveling device.

Conventionally, a traveling device in which a crawler is wound around the outer periphery of each of a plurality of wheels and a driving wheel and an idle roller provided on a pair of left and right traveling frames is provided below the body frame, and the traveling device is provided with the left and right traveling frames. A configuration in which one of the frames is moved up and down about the axis P to raise and lower the vehicle height to level the vehicle body is known (Patent Document 1).
JP-A-2-242611

The known example has a configuration in which the crawler on the other side is moved up and down about the axis center provided on one side of the machine frame, so that the horizontal control of the machine frame can be performed, but the height position of the mission and the crawler does not change, There is a problem that the muddy soil hits the lower part of the mission and the like and the running resistance increases.
The present application devised the configuration of the vehicle body horizontal mechanism and the configuration of the traveling device to reduce the running resistance, improve the front-rear weight balance, and reduce the weight of the entire aircraft by a simple and inexpensive configuration. .

In the present invention, a traveling device 4 configured by a crawler 10 being wound around the outer periphery of each of a plurality of wheels 7, a drive wheel 8, and an idle roller 9 provided on a pair of left and right traveling frames 6 below the body frame 1. The traveling device 4 is driven by a vehicle body horizontal mechanism L that moves one of the left and right traveling frames 6 up and down substantially parallel to the body frame 1 and raises and lowers the vehicle height of the body frame 1. The traveling surface of the oblique crawler portion 18 positioned between the first wheel 7 and the driving wheel 8 at the foremost position among the plurality of rollers 7 provided so as to be able to correct the right / left inclination with respect to the direction. The working vehicle is configured such that when the vehicle body frame 1 is lowered to the lowest height by the vehicle body horizontal mechanism L, the inclined crawler portions 18 of the left and right crawlers 10 have substantially the same inclination angle. The power of the prime mover is transmitted to rotate the left and right drive wheels 8, the left and right drive wheels 8 rotate the crawler 10 to travel the aircraft, and the left and right travel frames 6 are moved relative to the aircraft frame 1. The body frame 1 is held in a substantially horizontal state with respect to the traveling surface.
When the traveling frame 6 is lowered by the vehicle body horizontal mechanism L, the first wheel 7 at the foremost position moves forward, but when the vehicle frame of the fuselage frame 1 is lowered to the lowest, the left and right oblique crawler portions Since the inclination angle α of 18 is substantially the same, the front and rear positions and the vertical positions of the first wheel 7B that moves up and down and the first wheel 7B that moves up and down can be made substantially the same. Suppression of the downside of the upper and lower rolling wheels 7B (right side) when entering the rod at a substantially right angle is suppressed.
In the present invention, a traveling device 4 configured by a crawler 10 being wound around the outer periphery of each of a plurality of wheels 7, a drive wheel 8, and an idle roller 9 provided on a pair of left and right traveling frames 6 below the body frame 1. The traveling device 4 is driven by a vehicle body horizontal mechanism L that moves one of the left and right traveling frames 6 up and down substantially parallel to the body frame 1 and raises and lowers the vehicle height of the body frame 1. The traveling surface of the oblique crawler portion 18 positioned between the first wheel 7 and the driving wheel 8 at the foremost position among the plurality of rollers 7 provided so as to be able to correct the right / left inclination with respect to the direction. The upper and lower oblique crawler portions 18B when the vehicle height is the lowest are set so as to be gently inclined with respect to the stationary oblique crawler portion 18A, and the upper and lower oblique crawler portions 1 when the vehicle height is the highest. B is a work vehicle configured to be steeply inclined with respect to the stationary-side oblique crawler portion 18A. The inclination angle α (θ1) of the oblique crawler portion 18 when the vehicle height is the lowest and the vehicle height are The deviation of the front / rear balance (center of gravity) with respect to the inclination angle α (θ2) at the highest is reduced, and the upper and lower first rollers 7B side is prevented from inclining when entering at right angles to wheat straw or the like.

In the first aspect of the invention, when the vehicle body frame 1 has the lowest vehicle height, the inclination angle α of the left and right oblique crawler portions 18 is substantially the same. The front and rear and the vertical position of the upper and lower wheels 7B can be made substantially the same, and the vertical rolling wheel 7B side (right side) can be prevented from dropping when approaching the basket in the field or the basket in the field at a substantially right angle.
In the invention of claim 2, the difference between the inclination angle of the non-moving side oblique crawler portion 18A and the case where the vehicle height is the highest is the same, based on the inclination angle of the upper and lower oblique crawler portion 18B. As a result, the first upper and lower first rolling wheels 7B on the right side in the plan view are positioned forward and backward with respect to the position-immovable first rolling wheel 7A by raising and lowering the vehicle height.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings by using an example of a combine. Reference numeral 1 denotes a machine frame of a work machine such as a combine, which is configured by combining a substantially horizontal horizontal frame 2 and a vertical frame 3. 1 is provided with a traveling device 4.
The traveling device 4 has a plurality of rolling wheels 7 mounted on a pair of left and right traveling frames 6 at a predetermined interval in the front and rear, a driving wheel 8 on the front side of the traveling frame 6, and a rear side of the traveling frame 6. An idle roller 9 is disposed, and a crawler 10 is wound around each of the outer periphery of the roller 7, the drive wheel 8, and the idle roller 9 provided on the left and right traveling frames 6.
The traveling device 4 is attached to the body frame 1 via a vehicle body horizontal mechanism L, and the body frame 1 is in a substantially horizontal state even when the traveling surface is inclined higher (lower) on either the left or right side with respect to the traveling direction. Run on.

The body horizontal mechanism L is attached to the body frame 1 via the link mechanism 13 so that either the left or right traveling frame 6 moves up and down with respect to the body frame 1, and the link mechanism 13 is operated by an actuator 15 such as a hydraulic cylinder. Thus, the traveling frame 6 is configured to move up and down.
That is, when the left and right crawlers 10 are moved up and down, the vertical width can be increased, but the structure and control are complicated accordingly. In the present application, since either the left or right traveling frame 6 is moved up and down relative to the body frame 1, the configuration is simplified and the cost is reduced.
In this case, when the traveling frame 6 is moved up and down by the vehicle body horizontal mechanism L, the first wheel 7 at the foremost position among the plurality of rollers 7 is moved back and forth. The inclination angle (ground angle) α of the oblique crawler portion 18 located between the two changes.
When the inclination angle α of the oblique crawler portion 18 is steep, traveling resistance increases, and when the inclination angle α is loose, the center of gravity position becomes the front side, and the cutting part comes into contact with the field.

Therefore, in the present application, when the vehicle height of the fuselage frame 1 (the height on the side where the link mechanism 13 is provided) is lowered most by the vehicle body horizontal mechanism L, the inclination angles α of the left and right oblique crawler portions 18 are substantially the same. To be configured.
For horizontal control, when the vehicle height is raised, the inclination angle α of the positionless first rolling wheel 7A on the side where the vehicle body horizontal mechanism L is not provided remains unchanged, but the vehicle body horizontal mechanism L is provided. The first rolling wheel 7B on the side moves forward when the vehicle height is raised from the lowest position, so that the inclination (inclination angle α) of the oblique crawler portion 18 becomes steep, and the airframe is operated by the link mechanism 13. The inclination angles α of the left and right oblique crawler portions 18 when the vehicle height of the frame 1 is at the lowest level are configured to be substantially the same inclination angle.

By making the inclinations (inclination angle α) of the left and right oblique crawler portions 18 when the vehicle height is lowered to be substantially the same, before and after the first wheel 7B that moves up and down and the first wheel 7B that moves up and down, The vertical position can be made substantially the same, and the drop on the upper and lower first rolling wheel 7B side (right side) when entering the basket in the field or the basket in the field at a substantially right angle is suppressed.
In particular, in the case of a small work machine with a light weight of the airframe, if the inclination angle α is loose, the airframe will be lowered forward, so a balance weight may be provided at the rear of the airframe. By setting the 7A inclination angle α to a steep and steep inclination, the balance is reduced and the front and rear balances are eliminated. The balance weight provided at the rear of the fuselage is no longer necessary. Can be reduced.

That is, the inclination angle α of the stationary side oblique crawler portion 18A is set to a predetermined angle within a range where the cutting part does not contact the field, and the inclination angle α of the upper and lower side oblique crawler portion 18B is set as a reference based on this. When the height is at its lowest level, the inclination angle is substantially the same.
19 is a mission, 20 is a wheel shaft case, 21 is a threshing device, and 22 is a glen tank that temporarily stores grains threshed by the threshing device 21.

FIGS. 5 and 6 are examples relating to the setting of the inclination angle α of the upper and lower oblique crawler portions 18B on the side where the upper and lower first rollers 7B are provided, and the upper and lower oblique crawler portions 18B are stationary when the vehicle height is the lowest. The slanting crawler portion 18A is set so as to be gently inclined, and the top and bottom slanting crawler portion 18B when the vehicle height is the highest is steeply inclined with respect to the stationary slanting crawler portion 18A.
When the vehicle height on the upper and lower first rolling wheel 7B side is set to the highest level, if the inclination angle α of the left and right oblique crawler portions 18 is set to be the same, the upper and lower first wheels are moved to the right angle with respect to the wheat straw or the like. Although the wheel 7B side may be inclined, in the present application, the upper and lower oblique crawler portions 18B when the vehicle height is the lowest are set so as to be gently inclined with respect to the stationary oblique crawler portion 18A, and the vehicle height is the highest. Since the upper and lower oblique crawler portions 18B are configured to be steeply inclined with respect to the stationary oblique crawler portion 18A, when the right upper and lower first rollers 7B are moved up and down in plan view, Since the wheel 7B is positioned forward and backward with respect to the first stationary wheel 7A, the body is prevented from tilting toward the upper and lower first rollers 7B.

  That is, if the vehicle height is highest, the upper and lower first rollers 7B and the position-immobilized first rollers 7A are in substantially the same position in the front-rear direction, and the upper-side oblique crawler portion 18B and the stationary-side oblique crawler portion 18A. When the vehicle is at the same inclination angle, the upper and lower oblique crawler portions 18B when the vehicle height is lowered to the steep angle with respect to the stationary oblique crawler portion 18A. Will fall, and the right side of the fuselage will be tilted low to prevent this.

In this case, the vertical oblique crawler portion 18B when the vehicle height is the lowest is the inclination angle θ1 with respect to the stationary oblique crawler portion 18A, and the vertical oblique crawler portion 18B when the vehicle height is the highest is the position-immobilized first wheel 7A. The inclination angle θ2 with respect to the non-moving side oblique crawler portion 18A is substantially the same, and θ1 = θ2 (FIGS. 7 and 8).
For this reason, the front-rear balance (center of gravity) between the inclination angle θ1 when the vehicle height is the lowest and the inclination angle θ2 when the vehicle height is the highest is less, and when the vehicle enters at right angles to the wheat straw etc. Inclination of the upper and lower first rollers 7B side is suppressed.

FIGS. 9 and 10 show another embodiment, in which the upper and lower oblique crawler portions 18B when the vehicle height is the lowest and the inclination angle θ1 with respect to the stationary oblique crawler portions 18A and the upper and lower sides when the vehicle height is the highest. The oblique crawler portion 18B is configured such that the inclination angle θ2 with respect to the stationary-side oblique crawler portion 18A satisfies θ1> θ2.
For this reason, the first upper and lower first rollers 7B on the right side in the plan view are positioned forward and backward with respect to the first stationary wheel 7A. Suppresses tilting. Further, since θ2 is not tight, an increase in running resistance of the oblique crawler portion 18 when the vehicle body horizontal mechanism L side sinks during running in the wet field is suppressed.

11 and 12 show another embodiment, in which the upper and lower oblique crawler portions 18B when the vehicle height is the lowest are inclined angle θ1 with respect to the stationary oblique crawler portions 18A and the upper and lower sides when the vehicle height is the highest. The oblique crawler portion 18B is configured such that the inclination angle θ2 with respect to the stationary-side oblique crawler portion 18A of the first stationary wheel 7A is θ1 <θ2.
For this reason, the first upper and lower first rollers 7B on the right side in the plan view are positioned forward and backward with respect to the first stationary wheel 7A. Suppresses tilting. In addition, since the inclination angle θ1 is gentler than the inclination angle θ2, the tendency of the vehicle body to fall forward is reduced, so that even if the weight of the cutting part increases, it is allowed, and it is provided at the rear part of the aircraft. The balance weight is also unnecessary or lighter.

  Therefore, the traveling device 4 does not have the roller 7 disposed near the lower center of gravity to extend the ground contact length of the crawler 10 and improve the overpass performance for wetlands, and the crawler 10 A front side wheel group 7F and a rear side wheel group 7H are arranged in the front and rear, respectively. Each of the wheels 7 is configured by attaching a wheel body 41 to both left and right sides of a left and right wheel mounting shaft 40 provided in the traveling frame 6 and forming a wheel recess 42 between the left and right wheel bodies 41. (FIG. 14). A slip prevention protrusion 43 provided on the inner peripheral surface of the crawler 10 is fitted into the roller recess 42. A pair of separation preventing projections 43 are provided at predetermined intervals in the width direction of the crawler 10 and a plurality of separation preventing projections 43 are also provided at predetermined intervals in the length direction of the crawler 10 (FIG. 2). A crawler recess 44 is formed therebetween.

A crawler guide 48 for guiding the crawler 10 is provided in the crawler recess 44. The crawler guide 48 has front and rear guide portions 50 and 51 positioned below the front side wheel group 7F and the rear side wheel group 7H, and a central portion between the front side wheel group 7F and the rear side wheel group 7H upward. It is formed by a central bent portion 52 that is bent to connect the front guide portion 50 and the rear guide portion 51, and the central bent portion 52 is positioned higher than the traveling frame 6.
Since the crawler guide 48 is integrally formed by the central bent portion 52 that connects the guide portion 50 and the guide portion 51, the manufacturing and mounting costs can be reduced and the cost can be reduced.
Further, since the central bent portion 52 is bent upward, it can be smoothly passed over the heel.

  In this case, it is preferable that the central bent portion 52 is positioned below the center of gravity line G that is the center of gravity of the machine body because the weight balance before and after the heel crossing and the movement of the center of gravity position are smooth.

Accordingly, the central bent portion 52 of the crawler guide 48 is positioned below the lower surface of the crawler 10 passing between the drive wheel 8 and the idle roller 9 and is made as close as possible to the lower surface of the crawler 10.
When the central bent portion 52 is positioned below the lower surface of the crawler 10 passing between the drive wheel 8 and the idler roller 9, the entire length of the crawler 10 is lengthened to improve the wet paddy running performance. And the idle roller 9 can be prevented from sagging due to the weight of the non-grounded crawler 10. Further, a steadying wheel provided on the upper surface of the traveling frame 6 is usually unnecessary, and the cost is reduced.

Thus, the front side wheel group 7F and the rear side wheel group 7H are respectively composed of two wheels 7, and a guide part 50 and a guide part 51 are provided below the front side wheel group 7F and the rear side wheel group 7H. Position.
Therefore, by forming the front side wheel group 7F and the rear side wheel group 7H by the two wheels 7, the crawler 10 can be stably guided even with a small number of wheels 7, and the wheel removal is prevented.
Each of the above-described embodiments is illustrated or described separately or mixed for easy understanding, but these can be combined in various ways, and can be configured according to their description order and expression. -The action and the like are not limited, and there are of course cases where a synergistic effect is produced.

The side view of a traveling apparatus. The top view of a body frame and a traveling device (part). The rear view of a traveling apparatus. The side view of the descent state of a traveling frame. The side view of the vehicle height lowest state of another Example. The side view of the vehicle height-up state. The side view of the vehicle height lowest state of another Example. The side view of the vehicle height-up state. The side view of the vehicle height lowest state of another Example. The side view of the vehicle height-up state. The side view of the vehicle height lowest state of another Example. The side view of the vehicle height-up state. The side view of the traveling apparatus of another Example. The same part front view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Airframe frame, 2 ... Horizontal frame, 3 ... Vertical frame, 4 ... Traveling apparatus, 6 ... Traveling frame, 7 ... Rolling wheel, 8 ... Driving wheel, 9 ... Idle roller, 10 ... Crawler, 13 ... Link mechanism, 15 ... Actuator, 18 ... Diagonal crawler part, 19 ... Mission, 20 ... Wheel shaft case, 21 ... Threshing device, 22 ... Glen tank, 40 ... Rolling wheel mounting shaft, 41 ... Wheel, 42 ... Rolling wheel recess, 43 ... Detachment Protrusion for prevention, 48 ... crawler guide, 50 ... guide part, 51 ... guide part, 52 ... central bent part.

Claims (2)

Below the body frame 1 is provided a traveling device 4 configured by a crawler 10 being wound around the outer periphery of each of a plurality of wheels 7, a drive wheel 8, and an idle roller 9 provided in a pair of left and right traveling frames 6. The apparatus 4 tilts right and left with respect to the traveling direction by a vehicle body horizontal mechanism L that moves one of the left and right traveling frames 6 up and down substantially parallel to the body frame 1 to raise and lower the vehicle height of the body frame 1. The angle of inclination of the oblique crawler portion 18 located between the first wheel 7 and the driving wheel 8 at the foremost position of the plurality of rollers 7 with respect to the traveling surface is as follows. A working vehicle configured such that when the vehicle body frame 1 is lowered to the lowest level by the vehicle body horizontal mechanism L, the inclined crawler portions 18 of the left and right crawlers 10 have substantially the same inclination angle. Below the body frame 1 is provided a traveling device 4 configured by a crawler 10 being wound around the outer periphery of each of a plurality of wheels 7, a drive wheel 8, and an idle roller 9 provided in a pair of left and right traveling frames 6. The apparatus 4 tilts right and left with respect to the traveling direction by a vehicle body horizontal mechanism L that moves one of the left and right traveling frames 6 up and down substantially parallel to the body frame 1 to raise and lower the vehicle height of the body frame 1. The angle of inclination of the oblique crawler portion 18 located between the first wheel 7 and the driving wheel 8 at the foremost position of the plurality of rollers 7 with respect to the traveling surface is as follows. The upper and lower oblique crawler portions 18B when the vehicle height is the lowest are set to be gently inclined with respect to the stationary oblique crawler portion 18A, and the upper and lower oblique crawler portions 18B when the vehicle height is the highest. Configuration of Work Vehicle so steeper oblique crawler portion 18A.

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