CN107922021B - Crawler belt traveling device, combine harvester and harvester - Google Patents

Abstract

It is desirable to realize a crawler travel device capable of replacing only the roller portion of the tension pulley. The tension pulley (15) comprises: a hub part (81) rotatably supported by a support shaft (84), the support shaft (84) being supported by the tension frame (19); a roller section (82) which is mounted on the outer peripheral section of the hub section (81) and acts on the crawler belt (18); and a coupling section (C) that couples the hub section (81) and the roller section (82) so that the coupling can be released.

Description

Crawler belt traveling device, combine harvester and harvester

Technical Field

The invention relates to a crawler travel device, a combine harvester and a harvester.

Background

(1)

As the crawler travel device, for example, a crawler travel device described in patent document 1 is known. The crawler travel device described in patent document 1 includes: a drive wheel (in the literature, a "caterpillar drive wheel"); a tensioner (in the literature, a "tensioner"); the grounding rotating wheel is arranged between the driving wheel and the tensioning wheel; a track frame supporting the tension wheel and the ground-contacting rotating wheel; a crawler belt wound around the driving wheel, the tension wheel and the ground-contacting runner; and a tension frame (in the literature, a "tension adjusting frame") that is supported by the track frame in the forward/backward traveling direction so as to be capable of changing the position, and that rotatably supports the tension wheel. The tension pulley has: a hub portion rotatably supported by a support shaft supported by the tension frame; and a roller portion acting on the crawler belt.

(2)

As the above-described combine harvester, for example, a combine harvester described in patent document 2 is known. The posture control device of the combine harvester described in patent document 2 includes: an arm member (in the literature, a "swing arm") on the body frame side; a sleeve member (in the literature, a "second sleeve portion") on the track frame (in the literature, an "elevating track frame") side of the track travel device; and a coupling shaft (in the literature, a "support shaft") inserted through the sleeve member and coupling the arm member and the sleeve member to be relatively rotatable.

(3)

The harvester has dividers in a fixed state at both side ends in the width direction of the machine body of the harvesting processing part, the dividers perform the dividing processing on the crops as the harvesting object and the crops which are not the harvesting object, and the harvester cuts and harvests the crops as the harvesting object after the dividing processing is performed by the dividers at the left side and the right side through a harvesting knife. In the conventional technique, the crop divider is integrally formed in a substantially triangular shape when viewed from the side, and the lower edge of the crop divider is provided at a lower position near the harvesting position of the crop (see, for example, patent document 3).

(4)

The combine harvester has a harvesting part which is used for harvesting the plant crops while running at the front part of a running machine body, wherein the running machine body is provided with a pair of left and right crawler running devices as running devices, a threshing device for threshing the harvested crops and a grain box for storing grains obtained by threshing are loaded and supported on the running machine body in a left and right arrangement state. That is, the threshing device is provided on the traveling machine body in a state of being shifted to the left side with respect to the center position in the width direction of the machine body.

In addition, there is a combine harvester that discharges waste grass threshed by a threshing device from the rear side of the body of the threshing device. This combine harvester has a grass discharge cover body that receives waste grass discharged from the threshing device and discharges the waste grass from a lower side, in a rear part of the threshing device, the width of the grass discharge cover body is substantially the same as that of the threshing device, and side walls on both left and right sides of the grass discharge cover body are set in a posture along a front-rear direction of the machine body (see, for example, patent document 3).

(Prior art document)

(patent document)

Patent document 1: japanese patent application publication No. 2009-78772 "

Patent document 2: japanese patent application publication 'Japanese patent application laid-open No. 2011-158088'

Patent document 3: japanese patent application publication No. 2012-244924 "

Disclosure of Invention

(problems to be solved by the invention)

(1) The problem corresponding to the background art (1) is as follows.

In the crawler belt running device described in patent document 1, since the roller portion is integrally formed with the hub portion at the outer peripheral portion of the hub portion, even if only the roller portion of the tension pulley is worn, the entire tension pulley has to be replaced.

In view of the above, it is desirable to realize a crawler travel device capable of replacing only the roller portion of the tension pulley.

(2) The problem corresponding to the background art (2) is as follows.

In the combine harvester described in patent document 2, the arm member and the end portion of the sleeve member are coupled in a state in which the surfaces facing each other are in contact with each other, and muddy water or the like easily intrudes from the coupling portion between the arm member and the sleeve member. Further, if the inside is damaged by the intrusion of muddy water or the like, the crawler frame may be loosened.

In view of the above, it is desirable to realize a combine harvester in which muddy water or the like hardly intrudes from a connecting portion between the arm member and the sleeve member.

(3) The problem corresponding to the background art (3) is as follows.

When a crop is harvested in a farm field, the ground may be piled up higher as the portion near the ridge around the farm field is closer to the ridge. Further, in the prior art, since the lower end portion of the crop divider is the same as the harvesting position, the position at which the crop divider is kept low moves near the ground during the harvesting operation.

Thus, when a crop is harvested at a position close to the ridge, the lower portion of the crop divider located on the front end side of the machine body of the harvest processing unit may contact the ground. The portion near the ridge is often higher than the ground on the other inner side where soil is accumulated. Thus, when the ground is piled up and the ground is hard, the crop divider may be damaged due to the crop divider contacting the ground.

In order to avoid such contact with the ground, it is conceivable that a gap is formed between the crop divider and the ground so that the lower portion of the crop divider is located higher than the harvesting knife, and when the above-described structure is adopted, in the case where the crop falls, the crop cannot be harvested well.

That is, when a fallen crop is harvested, even a crop planted in a harvesting area sandwiched between the left and right crop dividers may enter a gap between the ground and the crop dividers and move to the outside. As a result, a harvest residue may be generated even in the harvest target area.

Here, it is desired to harvest a fallen crop well with less residue while avoiding damage to the crop divider due to contact with the ground.

(4) The problem corresponding to the background art (4) is as follows.

In the above-described conventional art, the waste grass discharged from the grass discharge cover is guided by the left and right side walls while being prevented from scattering laterally outward, and is discharged rearward in the width of the threshing device in a plan view. As described above, since the threshing device is provided on the traveling machine body in a state of being shifted to the left side with respect to the center position in the width direction of the machine body, the waste grass is discharged to a portion shifted to the left side with respect to the center position in the width direction of the machine body.

When the waste grass is discharged to a position on the left side with respect to the center position in the width direction of the machine body as described above, even if the waste grass is discharged from the threshing device to the rear side within the width range of the threshing device in a plan view by the grass discharge cover, part of the discharged waste grass may be discharged to an unharvested area located on the outer side in the lateral direction of the machine body.

When the waste grass is discharged to the non-harvested region, there are disadvantages that the waste grass falling to the non-harvested crop affects the harvesting operation, and the traveling device collapses the waste grass discharged to the ground when traveling in the next operation stroke. When crops of a type having a large threshing processing amount are harvested, the discharge amount of waste grass is large, and the possibility that part of the waste grass is discharged to an area where the crops are not harvested is also large.

Here, it is desirable that waste grass is not discharged to the non-harvest area side.

(means for solving the problems)

(1) The solution corresponding to the problem (1) is as follows.

The present invention is characterized in that it comprises,

a crawler travel device is provided in a pair of left and right sides and supports a travel machine body in a self-propelled manner,

comprising: a drive wheel;

a tension wheel;

a ground-contacting pulley disposed between the drive wheel and the tension wheel;

a track frame supporting the tension pulley and the ground-contacting roller;

a crawler belt wound around the drive wheel, the tension pulley, and the ground-contacting pulley; and

a tension frame supported by the track frame so as to be capable of changing a position in a forward/backward traveling direction, the tension frame rotatably supporting the tension wheel,

the tension pulley comprises: a hub portion rotatably supported by a support shaft supported by the tension frame; a roller portion mounted on an outer peripheral portion of the hub portion and acting on the crawler belt; and a coupling portion that couples the hub portion and the roller portion so as to be able to release the coupling.

According to this feature, the roller section can be detached from the boss section by releasing the coupling between the boss section and the roller section. Thus, when the roller portion is worn, the roller portion can be detached from the boss portion, and only the roller portion needs to be replaced.

Further, in the present invention, it is preferable that,

the roller portion is configured in such a manner that a plurality of divided roller bodies are arranged in the circumferential direction,

the plurality of divided roller bodies are coupled to the hub portion via the coupling portions, respectively.

According to this feature, the plurality of divided roller bodies can be detached from the hub portion by releasing the coupling between the hub portion and the plurality of divided roller bodies. Thus, not only the worn-out split roller bodies in the roller section can be partially replaced, but also the object to be removed can be light in weight, and the removal operation can be easily performed.

Further, in the present invention, it is preferable that,

a two-fork shaped support portion that supports both end portions of the support shaft with the tension pulley interposed therebetween from both sides in a rotation axis center direction of the tension pulley is provided at a distal end portion of the tension frame,

the support portion has a pair of left and right cut portions that cut in the opposite side of the direction in which the tension pulley applies tension, and into which both end portions of the support shaft are inserted and supported.

According to this feature, the hub portion can be detached from the support portion together with the support shaft only by pulling out the support shaft from the incision portion to the opposite side of the incision direction.

Further, in the present invention, it is preferable that,

the support portion has a ceiling portion that covers, from above, a space between the tension pulley and an upper portion of the base end portion of the support portion having the two-fork shape.

According to this structural feature, foreign matter (e.g., pebbles) entering the space from above is blocked by the ceiling portion, and the foreign matter can be prevented from being caught between the two-forked base end portion of the support portion and the tension pulley.

Further, in the present invention, it is preferable that,

a flange portion is formed on the outer peripheral portion of the hub portion,

the roller portion is screwed and fixed to the flange portion from the outside of the traveling machine body by a screw member in a state of being abutted from the outside of the machine body.

According to this feature, the roller portion can be attached to and detached from the flange portion from the outside of the machine body by operating the screw from the outside of the machine body. This makes it possible to easily replace the roller portion from the outside of the machine body, which is easily accessible.

Further, in the present invention, it is preferable that,

the roller portion has a hub-shaped base portion on an inner peripheral portion thereof, and the base portion is shaped along an outer peripheral portion of the hub portion.

According to this feature, the base portion having a large width is attached to the outer peripheral portion of the boss portion, and the roller portion can be firmly attached to the boss portion.

Further, in the present invention, it is preferable that,

the thickness of the flange portion is set to be thicker than the thickness of the roller portion at a connecting portion between the flange portion and the roller portion.

According to this feature, the roller portion is supported by the strong flange portion, so that the roller portion is stably mounted.

Further, in the present invention, it is preferable that,

the flange portion and the roller portion have a concave-convex structure portion at a connecting portion therebetween.

According to this structural feature, the flange portion and the roller portion can be easily positioned and coupled by the concave-convex configuration portion.

(2) The solution corresponding to the problem (2) is as follows.

The present invention is characterized by a combine harvester comprising:

a machine body frame;

a crawler travel unit supporting the body frame; and

an attitude control device that controls an attitude of the body frame with respect to the crawler travel device,

the attitude control device includes: an arm member on the side of the machine body frame; a sleeve member on a track frame side of the track traveling device; and a coupling shaft inserted through the sleeve member and coupling the arm member and the sleeve member to be relatively rotatable,

the end portions of the arm member and the sleeve member are coupled to each other by a concave-convex structure portion.

According to this feature, the end portions of the arm member and the sleeve member are coupled to each other by the concave-convex structural portion, so that the coupling portion between the arm member and the sleeve member has a relatively complicated structure, thereby improving the sealing property. This makes it difficult for muddy water or the like to enter from the joint between the arm member and the sleeve member.

Further, in the present invention, it is preferable that,

a sleeve portion is formed at a coupling portion of the arm member to be coupled to an end portion of the sleeve member, the sleeve portion projecting toward the sleeve member,

the sleeve portion covers an outer periphery of an end portion of the sleeve member.

According to this feature, the outer periphery of the end portion of the sleeve member is covered with the sleeve portion, and the sealing property of the joint portion between the arm member and the sleeve member is further improved.

Further, in the present invention, it is preferable that,

a sealing member is disposed between the sleeve portion and the sleeve member.

According to this feature, the sealing member prevents the ingress of muddy water or the like, and the sealing property of the joint portion between the arm member and the sleeve member is significantly improved.

Further, in the present invention, it is preferable that,

a reduced diameter portion is formed at an end portion of the sleeve member,

the sealing member is disposed between the sleeve portion and the reduced diameter portion.

According to this feature, the seal member can be provided in a small size without increasing the diameter of the sleeve portion.

Further, in the present invention, it is preferable that,

the sleeve member extends from the track frame toward the inside of the body,

the arm member is coupled to an end portion of the sleeve member on the inner side of the machine body in a state of being displaced toward the inner side of the machine body with respect to the crawler frame,

the combine harvester is provided with a receiving part which extends from the track frame to the lower part of the arm component in a cantilever shape and can block and support the arm component.

According to this feature, when the arm member is further lowered beyond the normal lowering limit, the receiving member blocks the support arm member, thereby preventing the arm member from falling.

(3) The solution corresponding to the problem (3) is as follows.

The present invention is characterized in that it comprises,

comprising: a harvesting processing part which transversely transfers the crops to the middle part of the width direction of the machine body and converges the crops after harvesting the crops; and a feeder for conveying the crop transversely transferred by the harvesting unit to the rear of the machine body,

the harvesting processing part is provided with a divider at the front part of the machine body of each of a pair of side wall parts positioned at the two side end parts in the width direction of the machine body, the divider performs dividing processing on crops as harvesting objects and crops not harvesting objects,

the divider has: a divider body located at the upper side; and a bottom cutting body detachably mounted on the lower side of the divider body.

According to the present invention, in a working condition in which a crop planted in a field is not fallen down, harvesting work is performed with the bottom divided body of the crop divider detached. By detaching the bottom divided body of the crop divider, the lower end of the crop divider is made higher than in the conventional case. As a result, for example, even in the case where the harvesting operation is performed by lowering the harvesting position in order to harvest the standing crop at a lower position as close to the ground as possible, when the crop is harvested at a position close to the ridge, the lower end portion of the crop divider can be easily prevented from contacting the ground. As a result, the problem of damage to the crop divider due to contact with the ground can be avoided.

In the working condition that crops planted in a farmland fall down, the crop divider performs harvesting work under the condition that the bottom dividing body is arranged at the lower side of the crop divider body. By mounting the bottom cutting body as described above, the lower end portion of the crop divider is located, for example, at a position substantially the same as or lower than the harvesting position. When the crop falls down, the crop is largely inclined and falls down at a position close to the ground, and the lower end portion of the crop divider is at a low position, so that even the above-mentioned fallen crop, the crop divider can enter between the crop as the harvesting object and the crop not as the harvesting object, and the crop dividing process can be reliably performed. Under the operation condition that crops fall down, the ground mostly contains more moisture and is softer, and the crop divider is not easy to be damaged even if contacting the ground.

Therefore, the crop divider can be prevented from being damaged due to contact with the ground, and the fallen crops can be harvested well in a state of less residual crop.

Further, in the present invention, it is preferable that,

the harvesting processing part is provided with a harvesting knife which cuts off the stem of the plant standing crop and harvests the crop,

the divider body is positioned at the position where the lower edge part of the divider body is higher than the harvesting knife,

the bottom divided body is positioned on the front side of the machine body with respect to the harvesting knife, and the lower edge of the bottom divided body is positioned lower than the harvesting knife.

According to this configuration, in the state where the bottom divided body is detached, the lower end portion of the divider, that is, the lower edge portion of the divider body is located at a position higher than the harvesting knife, and therefore, it is possible to reliably avoid damage to the divider body due to contact with the ground.

On the other hand, in the state where the bottom divided body is mounted, the lower end portion of the crop divider, that is, the lower edge portion of the bottom divided body is located at a position lower than the harvesting knife, and therefore, even if the crop falls down, the crop divider can reliably divide the crop to be harvested and the crop not to be harvested, and cut the crop divided as described above by the harvesting knife located on the rear side of the machine body of the bottom divided body, and therefore, the crop to be harvested after division can be harvested appropriately.

Further, in the present invention, it is preferable that a portion of the front lower portion of the side wall portion and inward in the machine body width direction has an inclined guide body in an inclined posture, and the inclined guide body is closer to the machine body rear side and closer to the inward in the machine body width direction in a plan view.

According to this configuration, the crop that has been cut by the crop divider as a harvest target is transferred and guided by the inclined guide body to the inner side in the width direction of the machine body while being kept in a state of being divided by the side wall portion. By guiding the crop to the inner side in the width direction of the machine body as described above, the crop can be appropriately harvested with less crop left as a harvest target.

Further, in the present invention, it is preferable that the tilt guide body has a rear-downward tilt posture in which the tilt guide body is closer to the rear side and closer to the lower side of the machine body when viewed from the side.

According to this configuration, the crop after being divided by the crop divider is guided to the lower side by the inclined guide body as the machine body travels. That is, since the harvesting machine is guided to the harvesting position set at the low position, the harvesting operation can be performed in the post-harvest state, and the harvesting residue can be further reduced, thereby performing good harvesting.

Further, in the present invention, it is preferable that an inclined portion having an inclined posture is formed at a front lower portion of the side wall portion, the inclined portion being closer to a lower side than a rear side of the machine body, and a bottom surface of the side wall portion and a bottom surface of the bottom divided body are continuous with each other in a state where the bottom divided body is attached to the divider body.

According to this configuration, when the bottom section is attached, the bottom surface of the side wall portion and the bottom surface of the bottom section are continuous with each other, and therefore, a space is not formed between the area over which the crop is guided from the crop divider to the side wall portion and the ground surface, and therefore, it is possible to reliably avoid a problem that the crop is left behind by escaping through the space.

When the bottom divided body is detached from the grain divider body, the front lower portion of the side wall portion is in a state where the inclined portion is positioned at the lower end portion, and therefore, the crop is guided by the inclined portion. Since the inclined portion is formed in an inclined posture in which the inclined portion is closer to the lower side as it is closer to the rear side of the machine body, the inclined portion is gradually pressed downward as the machine body travels after being guided by the divider body, and the division guide can be performed in a smooth state without being forcibly torn or the like.

Further, in the present invention, it is preferable that a front end edge of the bottom divided body is located on a rear side of the body with respect to a front end edge of the divider body, and a notch portion having a step shape when viewed from a side surface is formed on a front lower side of the divider body.

According to this configuration, since the notch portion having a step shape when viewed from the side is formed between the front end edge of the divider body and the front end edge of the bottom divided body, the crop to be divided and guided is guided not in a state of being directly pushed in from the front end edge of the divider body to the lower end edge of the bottom divided body, but is guided stepwise through the notch portion. As a result, the crop is not easily pulled out or torn up by being directly pushed in, and the crop to be harvested and the crop not to be harvested are dispensed in the notched portion, so that the crop-dividing treatment can be performed in a favorable state without damaging the crop.

(4) The solution corresponding to the problem (4) is as follows.

The present invention is characterized in that it comprises,

comprising: a traveling machine body having a pair of right and left traveling devices; and a threshing device for threshing the harvested crops,

the threshing device is arranged on the running machine body in a state of being deviated to either the left or the right relative to the central position of the machine body in the width direction,

a grass discharge hood body is arranged at the rear part of the threshing device, receives waste grass discharged from the threshing device and discharges the waste grass to the outside from the lower side,

the inner side wall of the grass discharge cover body positioned on the inner side of the machine body in the width direction is inclined in a posture that the closer the inner side wall is to the rear side of the machine body, the closer the inner side wall is to the center side of the machine body in the left-right direction.

According to the present invention, when harvesting work is performed while the traveling machine body is traveling, threshing of crops is performed by the threshing device, and waste grass after threshing is discharged to the outside from the rear side of the threshing device. At this time, the waste grass discharged from the threshing device is received by the grass discharge cover body provided at the rear of the threshing device, and is discharged to the outside from the lower side of the grass discharge cover body.

Since the grass discharge cover body is inclined such that the inner side wall is closer to the center side in the left-right direction of the machine body toward the rear side of the machine body, when waste grass discharged and received from the threshing device is discharged to the outside, the waste grass can be discharged as close as possible to the center side in the left-right direction of the machine body by guiding the waste grass along the inner side wall at the inner side portion in the width direction of the machine body.

As a result, even if the threshing processed object is processed in a large amount, the waste grass can be made as close as possible to the center side in the left-right direction of the machine body, and thus the waste grass can be prevented from being discharged to the unharvested area.

Further, in the present invention, it is preferable that an outer side wall of the grass discharge cover located on the outer side in the machine body width direction assumes a front-rear orientation along the machine body front-rear direction.

According to this configuration, the outer side wall of the grass discharge cover body assumes a front-rear orientation along the front-rear direction of the machine body, and therefore, the inner space on the rear side of the grass discharge cover body is expanded in the width direction, and waste grass discharged from the threshing device is less likely to be caught or caught inside the grass discharge cover body, and can be smoothly discharged to the outside.

Further, in the present invention, it is preferable that,

a grain tank for storing grains obtained by the threshing device is arranged in a state of being arranged in a width direction of the threshing device,

a fuel tank is arranged between the threshing device and the grain tank and adjacent to the inner side wall of the grass discharging cover body,

the inside side wall extends to a position lower than the upper surface of the fuel tank.

According to this structure, the idle area between the threshing device and the grain tank is effectively utilized, and the fuel tank can be arranged in a small size without causing an increase in size such as a projection outward of the machine body.

The inner side wall of the grass discharge cover body is inclined toward the center side in the left-right direction of the machine body as the rear side of the machine body approaches, and therefore, the inner side wall is in a state of approaching the fuel tank. As a result, the waste grass is guided toward the fuel tank side by the inner side wall, but the inner side wall extends to a position lower than the upper surface of the fuel tank, so that the waste grass discharged from the grass discharge cover body is less likely to fall on the upper surface of the fuel tank.

Therefore, in the structure in which the fuel tank is provided in a small size by effectively utilizing the vacant area, waste grass is not discharged to the non-reaped area, and the waste grass is prevented from accumulating on the upper portion of the fuel tank.

Further, in the present invention, it is preferable that a rear end of the inner side wall extends to a position close to a side surface of the fuel tank.

According to this configuration, the space between the threshing device and the fuel tank can be fully utilized, and the inner side wall can be inclined toward the center of the machine body in the left-right direction.

Further, in the present invention, it is preferable that the grass discharge cover has a flow-down guide body inside the grass discharge cover body, the flow-down guide body extending from an outer side wall located on an outer side in the machine width direction toward the inner side wall and being located further downward toward an inner side in the machine width direction.

According to this configuration, the waste grass discharged from the threshing device is guided by the flow-down guide provided in the grass discharge cover in an inclined posture to flow down from the outer side in the width direction of the machine body to the inner side in the width direction of the machine body, and is discharged from the lower side to the outside.

In the interior of the grass discharge cover body, waste grass can be discharged to the outside of the machine body in a state of being close to the inner side in the machine body width direction, and the waste grass can be reliably prevented from being thrown into an unharvested area on the outer side in the machine body width direction.

Further, in the present invention, it is preferable that the flow-down guide is provided at a position closer to the outside of the body than a center position in the width direction of the body of the grass discharge cover.

The flow-down guide guides the waste grass to flow down toward the inner side in the width direction of the machine body, and for example, when the flow-down guide is provided at a position closer to the inner side than the center position in the width direction of the machine body, the area through which the waste grass passes is narrow in the grass discharge cover, and when a large amount of waste grass or the like is discharged, the waste grass may be clogged in the grass discharge cover to hinder the discharge process.

In contrast, according to this configuration, the flow-down guide is provided at a position closer to the outside of the machine body than the center position in the machine body width direction of the grass discharge cover body, so that clogging of waste grass is less likely to occur, and the discharge treatment can be smoothly performed.

Further, in the present invention, it is preferable that the downflow guide body has a steep inclined portion having a large inclination angle with respect to a horizontal plane at a guide start end side portion located on an upper side, and a gentle inclined portion having a small inclination angle with respect to a horizontal plane at a guide terminal end side portion located on a lower side.

According to this configuration, the waste grass guided by the downflow guide is guided by the steep inclined portion located at the guide start end side, and then is continuously guided by the gentle inclined portion located at the guide terminal end side. Since the steep slope has a large inclination angle with respect to the horizontal plane, the waste grass can be guided well by the momentum. The waste grass guided by the momentum head is guided by the momentum head in the horizontal direction or the direction close to the horizontal direction in the gentle slope part and is discharged to the outside.

With the above structure, the flow-down guide body has a small shape with a short overall length, and can well guide the waste grass to flow down, and then throw the waste grass to the inner side of the width direction of the machine body.

Further, in the present invention, it is preferable that the gentle inclined portion of the downflow guide body has a horizontal portion having a horizontal posture.

According to this configuration, the waste grass guided with a high tendency to flow down by the steep slope is thrown in a substantially horizontal direction by the horizontal portion in a horizontal posture, and thus can be thrown farther inward in the machine width direction.

Further, in the present invention, it is preferable that,

the threshing device is provided with a threshing cylinder rotating around a front and back axis and a bearing net arranged in an arc shape along the outer periphery of the threshing cylinder in the threshing chamber, and a swing sorting device for sorting threshed treatment objects is arranged below the threshing chamber,

the upper end position of the guiding start end side part of the downflow guiding body is positioned between the rotating axle center of the threshing cylinder and the lower end part of the receiving net in the vertical direction and is close to the rotating axle center,

the lower end position of the guide terminal side part of the downflow guide body is located between the lower end of the rear wall of the threshing chamber and the upper end of the swing sorting device in the vertical direction.

According to this configuration, the crop is threshed in the threshing chamber by the threshing cylinder and the receiving net that rotate around the front and rear axes, and the threshed product that has leaked to the lower side of the threshing chamber is sorted into dust such as grains and waste grass by the swing sorting device. The grain is stored in the grain box, and the waste grass is discharged backward from the rear end of the threshing chamber.

The swing sorting device is supplied with sorting air from the front side, and fine dust is discharged to the rear side together with waste grass. The separation wind passes through an opening formed between the lower end of the rear wall of the threshing chamber and the upper side of the swing separation device, and is discharged to the rear of the threshing device together with dust. At the rear end of the threshing chamber, the waste grass is rotated together with the rotation of the threshing cylinder and discharged rearward.

The upper end of the guiding start end of the downward guiding body is located between the rotation axis of the threshing cylinder and the lower end of the receiving net and close to the rotation axis in the vertical direction. That is, the position where the flow-down guide starts to guide the waste grass is a higher position near the rotation axis of the threshing cylinder. As a result, the waste grass discharged from the threshing chamber can be guided from a high position, and therefore, the waste grass can be easily guided to flow down.

The lower end position of the guide terminal side part of the downflow guide body is positioned between the lower end of the rear wall of the threshing chamber and the upper end of the swing sorting device in the vertical direction. The part through which the sorting wind passes is arranged between the lower end of the rear wall of the threshing chamber and the upper end of the swinging sorting device. When the waste grass guided by the flow-down guide body flows down reaches the guide terminal side portion, the waste grass can be thrown backward by the sorting wind by the action of the sorting wind, and the waste grass can be smoothly discharged without being accumulated.

Further, in the present invention, it is preferable that,

the threshing device is provided with a threshing cylinder rotating around a front and rear axis and a bearing net arranged in an arc shape along the peripheral part of the threshing cylinder in the threshing chamber, a swinging sorting device for sorting threshing processed objects is arranged below the threshing chamber, and the gentle inclined part is positioned between the lower end of the rear wall of the threshing chamber and the upper end of the swinging sorting device in the up-down direction.

According to this configuration, the gentle slope portion is located between the lower end of the rear wall of the threshing chamber and the upper end of the swing sorting device in the vertical direction, and therefore, the sorting air acts on the waste grass guided along the gentle slope portion.

That is, since the large range of the gently inclined portion is guided by the sorting wind, the waste grass can be smoothly discharged without being accumulated more reliably.

Drawings

Fig. 1 is a left side view showing a general type combine harvester.

Fig. 2 is a left side view showing the crawler travel apparatus and the body frame.

Fig. 3 is a plan view showing the crawler travel device and the body frame.

Fig. 4 is a rear sectional view showing the front link mechanism.

Fig. 5 is an exploded perspective view showing the front link mechanism.

Fig. 6 is a rear sectional view showing a connection structure between the forearm member and the front sleeve member.

Fig. 7 is a rear sectional view showing the rear link mechanism.

Fig. 8 is a rear sectional view showing a coupling structure between the rear arm member and the rear socket member.

Fig. 9 is a left side view showing a state where the body frame is raised with respect to the crawler travel device.

Fig. 10 is a rear sectional view showing the tension pulley.

Fig. 11 is an exploded perspective view showing a support structure of the tension pulley.

Fig. 12 is a left side view showing a state in which the roller portion is mounted on the boss portion.

Fig. 13 is a top sectional view showing a state in which the roller portion is attached to the boss portion.

Fig. 14 is a left side view showing a state where the rear split roller body is detached from the boss portion.

Fig. 15 is a top cross-sectional view showing a state where the rear split roller body is removed from the boss portion.

Fig. 16 is a left side view showing a state where the remaining divided roller bodies are rotated.

Fig. 17 is a top cross-sectional view showing a state where the remaining divided roller bodies are removed from the boss portion.

Fig. 18 is a left side view showing a state where the boss portion is detached from the support portion.

Fig. 19 is a plan view showing a state where the boss portion is detached from the support portion.

Fig. 20 is an upper perspective view showing a support structure of the rear arm member.

Fig. 21 is a lower perspective view showing a support structure of the rear arm member.

Fig. 22 is a plan view showing a support structure of the rear arm member.

Fig. 23 is a left side view showing a support structure of the rear arm member.

Fig. 24 is a left side view showing the transmission case.

Fig. 25 is a top sectional view showing a support structure of the transmission case.

Fig. 26 is a top sectional view showing a state where the left split case is detached from the right split case.

Fig. 27 is a rear sectional view showing a concave-convex structure portion according to another embodiment.

Fig. 28 is a rear sectional view showing a concave-convex structure portion according to another embodiment.

Fig. 29 is an overall side view of the combine harvester.

Fig. 30 is an overall plan view of the combine harvester.

Fig. 31 is a side view of the divider arrangement on the right side.

Fig. 32 is a plan view of the harvesting knife.

Fig. 33 is a cross-sectional plan view of the divider arrangement portion on the right side.

Fig. 34 is a vertical sectional front view of the driving portion of the harvesting knife.

Fig. 35 is a partial plan view of the harvesting knife.

FIG. 36 is a cross-sectional view taken along line XXXVI-XXXVI of FIG. 35.

Fig. 37 is a side view of the divider arrangement portion on the right side in a state where the bottom divided body is not attached.

Fig. 38 is a top view of the crop divider body.

Fig. 39 is a front view of the crop divider body.

Fig. 40 is a plan view showing a mounted state of the tilt guide body.

Fig. 41 is a side view showing a mounted state of the tilt guide body.

Fig. 42 is a rear view of the mirror arrangement portion.

Fig. 43 is an overall side view of the combine harvester.

Fig. 44 is an overall plan view of the combine harvester.

Fig. 45 is a rear view of the combine.

Fig. 46 is a longitudinal sectional side view of the threshing device.

Fig. 47 is a longitudinal sectional rear view of the threshing device.

FIG. 48 is a top view of the hood body.

Fig. 49 is a perspective view of the downflow guide body.

Fig. 50 is a side view of the threshing device.

Fig. 51 is a power transmission diagram.

Fig. 52 is a front longitudinal sectional view showing the transmission structure.

Fig. 53 is a side view showing a transmission structure.

Fig. 54 is a perspective view showing a support structure of the wire receiving member.

Fig. 55 is a rear view, partly in longitudinal section, showing the threshing device.

Fig. 56 is an exploded perspective view of the fourth cover.

Fig. 57 is a perspective view showing a cover of the threshing device.

Description of the reference numerals

1: frame of machine body

2: crawler belt driving device

3: posture control device

14: driving wheel

15: tension wheel

16: touchdown rotating wheel

17: track frame

18: caterpillar band

19: tensioning frame

19A: support part

19 a: incision part

19 b: ceiling part

36: forearm component (arm component)

37: front sleeve part (sleeve part)

37 a: diameter reducing part

38: front connecting shaft (connecting shaft)

41 a: sleeve part

56: o-shaped ring (sealing component)

58: rear arm parts (arm parts)

59: rear sleeve part (sleeve part)

59 b: second reducing part (reducing part)

60: rear connecting shaft (connecting shaft)

63 a: sleeve part

78: o-shaped ring (sealing component)

80: receiving member

81: wheel hub part

81A: flange part

82: roller part

84: support shaft

89: bolt (screw joint piece)

97: split roller body

97B: base part

200: inclined guide body

209: harvesting processing part

210: feeding device

213: nearside divider

213A: divider body

213B: bottom partition body

215: harvesting knife

220: side wall part

297: front edge

298: front edge

299: notch part

302: traveling device

304: threshing device

305: grain box

322: threshing cylinder

323: receiving net

328: threshing chamber

336: swing sorting device

390: straw discharging hood

390A: outside side wall

390B: inside side wall

391: fuel tank

394: flow-down guide

395: rear wall

398: steep slope

399: gentle slope

399 b: horizontal part

C: connecting part

Sb: concave-convex structure part

Sf: concave-convex structure part

St: concave-convex structure part

W1: thickness of flange part

W2: thickness of roll part

X6: axle center (rotating axle center)

Detailed Description

(first embodiment)

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the direction of arrow F shown in fig. 1 and 3 is "front side of the body", the direction of arrow B is "rear side of the body", the direction of arrow L shown in fig. 3 is "left side of the body", and the direction of arrow R is "right side of the body".

(integral structure of general type combine harvester)

Fig. 1 shows a conventional combine harvester. The combine harvester comprises: a machine body frame 1; and a pair of left and right crawler travel devices 2 for supporting the travel machine body in a self-propelled manner. An attitude control device 3 is also provided, and the attitude control device 3 controls the attitude of the body frame 1 with respect to the pair of right and left crawler belt traveling devices 2. The front part of the machine body frame 1 is provided with a harvesting part 4 for harvesting and planting the vertical grain stalk. A steering unit 5 is provided behind the harvesting unit 4.

An engine E is provided below the driver unit 5. A transmission case 6 is provided between the pair of right and left crawler travel devices 2.

The transmission case 6 houses a transmission device (not shown) for changing the speed of the power from the engine E. The transmission case 6 has a pair of left and right axles 6a that drive the crawler belt traveling device 2 (drive wheels 14). The transmission case 6 is constituted by a left divided case 6A and a right divided case 6B so as to be dividable in the machine body left-right direction (see fig. 3).

Behind the steering unit 5, a threshing device 7 for threshing the harvested crops and a grain box 8 for storing the harvested grains are provided adjacent to each other in the left-right direction of the machine body. The grain tank 8 is provided with a discharger 9 for discharging harvested grains in the grain tank 8.

(body frame)

As shown in fig. 2 and 3, the body frame 1 includes: a pair of left and right main frames 10 extending in the front-rear direction of the machine body; and a front cross frame 11 and a rear cross frame 12 crossing the pair of left and right main frames 10. A main frame 13 shorter than the main frame 10 is provided across the front cross frame 11 and the rear cross frame 12.

(crawler traveling device)

As shown in fig. 2 and 3, crawler travel device 2 includes drive wheel 14, idler wheel 15, a plurality of (e.g., seven) ground-contacting rollers 16, crawler frame 17, and crawler 18. The ground engaging wheel 16 is disposed between the drive wheel 14 and the tension wheel 15. Track frame 17 supports idler wheel 15 and ground-contacting roller 16. Track 18 wraps around drive wheel 14, idler wheel 15, and ground engaging wheel 16.

The drive wheel 14 is provided at the front end portion of the crawler travel device 2. The drive wheels 14 are supported by the axle 6a so as not to be relatively rotatable.

The idler 15 is provided at the rear end of the crawler belt traveling apparatus 2. The tension pulley 15 is rotatably supported by a tension frame 19.

The crawler frame 17 is formed of a hollow member (e.g., an angular pipe) extending in the front-rear direction of the machine body. A front anchor plate 20, a middle anchor plate 21, and a rear anchor plate 22 are welded and fixed to the lower surface of the track frame 17. On the front side of the track frame 17, a front frame 23 is fixed to the front and middle fixing plates 20, 21 by bolts 24 (see fig. 4). On the rear side of the track frame 17, a rear frame 25 is fixed to the center fixing plate 21 and the rear fixing plate 22 by bolts 26 (see fig. 7).

The front frame 23 rotatably supports a plurality of (e.g., four) touchdown wheels 16. The front frame 23 is fixed with a front track guide 27 by a bolt 28. The rear frame 25 rotatably supports a plurality of (e.g., three) touchdown wheels 16. The rear frame 25 is fixed with a rear track guide 29 by bolts 28.

The tension frame 19 is inserted through the rear end portion of the crawler frame 17, and is supported by the crawler frame 17 so as to be capable of changing its position in the forward/backward traveling direction (the machine body forward/backward direction). Tension bolts 30 are provided across tension frame 19 and track frame 17.

The tension bolt 30 is supported by the support plate 17a on the track frame 17 side. By rotating the tension bolt 30, the position of the tension frame 19 can be changed in the front-rear direction of the machine body.

A web 31 is provided across the track frame 17 and the intermediate fixing plate 21. The linking plate 31 is welded and fixed to the track frame 17 and the intermediate fixing plate 21.

The link plate 31 links the track frame 17 and the intermediate fixing plate 21, thereby reducing stress in the vicinity of the central portion of the track frame 17 in the front-rear direction and alleviating a difference in strength between the track frame 17 and the intermediate fixing plate 21 (normally, the intermediate fixing plate 21 is stronger than the track frame 17). Further, the front and rear end portions of the linking plate 31 extend, respectively, so that the stress near the center portion in the front-rear direction of the crawler frame 17 is transmitted to the front and rear end portion sides of the crawler frame 17.

(attitude control device)

As shown in fig. 2 and 3, the attitude control device 3 includes a pair of left and right front link mechanisms 32, a pair of left and right rear link mechanisms 33, a pair of left and right hydraulic cylinders 34, and a pair of left and right connecting rods 35. The hydraulic cylinder 34 swings to drive the rear link mechanism 33. The link 35 links the front link mechanism 32 and the rear link mechanism 33.

(front side link mechanism)

As shown in fig. 4 to 6, the front link mechanism 32 includes: a forearm member 36 (corresponding to an "arm member" of the present invention) on the body frame 1 side; a front sleeve member 37 on the track frame 17 side (corresponding to a "sleeve member" of the present invention); and a front coupling shaft 38 (corresponding to a "coupling shaft" of the present invention) inserted through the front sleeve member 37 and coupling the front arm member 36 and the front sleeve member 37 to be relatively rotatable. The front link mechanism 32 is a link (i.e., a cancel link) for preventing trouble and the like due to manufacturing errors and assembly errors of the components of the link mechanism.

The forearm member 36 is supported by a forearm support portion 39 on the body frame 1 side. The forearm member 36 is constituted by a first forearm member 40 and a second forearm member 41 connected together via a support shaft 42 so as to be relatively non-rotatable. The front arm member 36 is coupled to the inner end of the front sleeve member 37 in the lateral direction of the machine body in a state shifted laterally inward of the crawler frame 17.

The proximal end of the first front arm 40 is connected to the inner lateral end of the support shaft 42 so as to be relatively non-rotatable. The front end of the front first arm 40 is connected to the front end of the connecting rod 35.

The proximal end of the second forearm 41 is connected to the lateral outer end of the support shaft 42 so as to be relatively non-rotatable. A sleeve-shaped support portion 41A that supports the front coupling shaft 38 is formed at the distal end portion of the front second arm 41. The support portion 41A is provided with a drain plug 43.

The support shaft 42 is rotatably supported via a sleeve 45 to a front sleeve portion 44 of the front arm support point portion 39 around an axial center X1. O-rings 46 are provided between the support shaft 42 and the left and right ends of the front sleeve portion 44.

The front sleeve member 37 is formed with a pair of left and right side plates 37A that sandwich the crawler frame 17 from both left and right sides. The side plate 37A is coupled to the sleeve portion 47 on the track frame 17 side via a coupling shaft 48 so as to be swingable about the axial center X2. The front sleeve member 37 extends from the track frame 17 to the body lateral inner side. The body lateral outer end of the front sleeve member 37 is closed by a cover 49. The front sleeve member 37 is provided with a lubricating oil connecting pipe 50. The lubricating oil is injected between the front sleeve member 37 and the front connecting shaft 38 from the lubricating oil connecting pipe 50, and air or the like is discharged to the outside from the drain plug 43.

The front connecting shaft 38 is welded and fixed such that the body lateral inner end of the front connecting shaft 38 is inserted through the support portion 41A. The front coupling shaft 38 is supported by the front sleeve member 37 via the sleeve 51 so as to be rotatable about the shaft center X3. The front connecting shaft 38 is prevented from being disengaged from the lateral outside of the machine body by the bolt 52 and the retaining plate 53 in a state of being inserted through the front sleeve member 37. An O-ring 54 and a washer 55 are provided between the front coupling shaft 38 and the left and right end portions of the front sleeve member 37.

(connection structure between front arm member and front sleeve member)

As shown in fig. 6, the support portion 41A of the front second arm 41 and the inner end of the front sleeve member 37 in the lateral direction of the machine body are connected by a concave-convex structure portion Sf (the sleeve portion 41A as a concave portion, and the inner end of the front sleeve member 37 in the lateral direction of the machine body as a convex portion). In this regard, it will be explained in detail below.

A sleeve portion 41A is formed at a coupling portion of the support portion 41A to the body transverse inner end portion of the front sleeve member 37, and the sleeve portion 41A projects toward the front sleeve member 37 side. The sleeve portion 41a is fitted into the inner end of the front sleeve member 37 in the lateral direction of the machine body. That is, the sleeve portion 41a covers the outer periphery of the inner end portion of the front sleeve member 37 in the transverse direction of the machine body. Further, the inner peripheral corner portion of the distal end portion of the sleeve portion 41a is subjected to a widening process, so that the body transverse inner end portion of the front sleeve member 37 is easily fitted.

A reduced diameter portion 37a is formed at the inner end of the front sleeve member 37 in the transverse direction of the machine body. The distal end surface of the reduced diameter portion 37a abuts against the side surface of the sleeve portion 41 a. An O-ring 56 (corresponding to a "seal member" of the present invention) and a gasket 57 are provided between the reduced diameter portion 37a and the sleeve portion 41 a. The outer peripheral corner portion of the tip end portion of the reduced diameter portion 37a is subjected to a tapering process, so that the O-ring 56 and the washer 57 are easily fitted around the reduced diameter portion 37 a.

(rear side link mechanism)

As shown in fig. 7 and 8, the rear link mechanism 33 includes: a rear arm member 58 (corresponding to an "arm member" of the present invention) on the body frame 1 side; a rear sleeve member 59 on the track frame 17 side (corresponding to a "sleeve member" of the present invention); and a rear coupling shaft 60 (corresponding to a "coupling shaft" of the present invention) inserted through the rear sleeve member 59 to couple the rear arm member 58 and the rear sleeve member 59 to each other so as to be relatively rotatable.

The rear arm member 58 is supported by a rear arm fulcrum portion 61 on the side of the body frame 1. The rear arm member 58 is constituted by a rear first arm 62 and a rear second arm 63 connected together by a support shaft 64 so as to be relatively non-rotatable. The rear arm member 58 is coupled to the inner end of the rear sleeve member 59 in the lateral direction of the machine body in a state shifted from the crawler frame 17 toward the inner side in the lateral direction of the machine body.

The base end of the rear first arm 62 is connected to the body lateral inner end of the support shaft 64 so as not to be relatively rotatable. The rear end of the connecting rod 35 and the front end of the hydraulic cylinder 34 are connected to the front end of the rear first arm 62.

The proximal end of the rear second arm 63 is connected to the lateral outer end of the support shaft 64 so as to be relatively non-rotatable. A sleeve-shaped support portion 63A for supporting the rear coupling shaft 60 is formed at the distal end portion of the rear second arm 63. The support portion 63A is provided with a drain plug 65.

The support shaft 64 is rotatably supported via a sleeve 67 on the rear sleeve portion 66 of the rear arm fulcrum portion 61 about an axial center X4. O-rings 68 are provided between the support shaft 64 and the right and left end portions of the rear sleeve portion 66. A roller 69 acting on the crawler belt 18 is provided at the lateral outer end of the body of the support shaft 64.

The rear sleeve member 59 is welded and fixed to the pair of left and right side plates 70 on the crawler frame 17 side in a state of penetrating the pair of left and right side plates 70. The rear sleeve member 59 extends laterally inward of the machine body from the track frame 17. The body lateral outer end of the rear sleeve member 59 is closed by the cover 71. The rear sleeve member 59 is provided with a lubricating oil connecting pipe 72. The lubricating oil is injected from the lubricating oil connecting pipe 72 between the rear sleeve member 59 and the rear connecting shaft 60, and air or the like is discharged from the drain plug 65 to the outside.

The rear connecting shaft 60 is welded and fixed in such a manner that the body lateral inner end of the rear connecting shaft 60 is inserted through the support portion 63A. The rear coupling shaft 60 is rotatably supported via a sleeve 73 to the rear sleeve member 59 about an axial center X5. The rear coupling shaft 60 is prevented from being disengaged from the lateral outside of the body by the bolt 74 and the retaining plate 75 in a state of being inserted through the rear sleeve member 59. An O-ring 76 and a washer 77 are provided between the rear coupling shaft 60 and the right and left end portions of the rear sleeve member 59.

(connection structure between rear arm member and rear sleeve member)

As shown in fig. 8, the support portion 63A of the rear second arm 63 and the inner lateral end of the rear sleeve member 59 are connected by a concave-convex structure portion Sb (the sleeve portion 63A as a concave portion and the inner lateral end of the rear sleeve member 59 as a convex portion). In this regard, it will be explained in detail below.

A sleeve portion 63A projecting toward the rear sleeve member 59 is formed at a coupling portion of the support portion 63A to the body inner side end portion of the rear sleeve member 59. The rear sleeve member 59 is fitted into the sleeve portion 63a at the inner end of the transverse section of the machine body. That is, the sleeve portion 63a covers the outer periphery of the laterally inner end of the rear sleeve member 59. Further, the inner peripheral corner portions of the distal end portions of the sleeve portions 63a are subjected to a widening process, so that the body-side inner end portions of the rear sleeve members 59 are easily fitted.

A first reduced diameter portion 59a and a second reduced diameter portion 59b are formed in this order from the lateral outside of the machine body at the lateral inside end of the rear sleeve member 59. The second reduced diameter portion 59b corresponds to the "reduced diameter portion" of the present invention. The distal end surface of the second reduced diameter portion 59b abuts against the side surface of the sleeve portion 63 a. An O-ring 78 (corresponding to a "seal member" of the present invention) and a gasket 79 are provided between the second reduced diameter portion 59b and the sleeve portion 63 a. The outer peripheral corner portion of the tip end portion of the second reduced diameter portion 59b is subjected to tapering so that the O-ring 78 and the washer 79 are easily fitted around the second reduced diameter portion 59 b.

(operation of attitude control device)

As shown in fig. 9, when the hydraulic cylinder 34 is extended, the rear arm member 58 swings about the axis X4 and the axis X5, and the movement of the rear arm member 58 is transmitted to the front link mechanism 32 via the connecting rod 35. Thereby, the forearm member 36 swings about the shaft center X1 and the shaft center X3, and the front sleeve member 37 swings about the shaft center X2. Then, the body frame 1 is raised with respect to the crawler travel device 2. Further, by performing the extending operation of the pair of left and right hydraulic cylinders 34 in accordance with the inclination of the floor surface, the body and the body can be kept substantially horizontal in the left-right direction.

Here, the receiving member 80 extends in a cantilever manner from the front end portion of the crawler frame 17 to the lower side of the front second arm 41 on the lateral inner side of the machine body. The receiving member 80 is formed of a groove-shaped member that opens downward.

With the above configuration, when the forearm member 36 further descends beyond the normal descending limit (for example, when the welding fixation between the front second arm 41 and the front coupling shaft 38 is released), the end of the front second arm 41 on the support shaft 42 side comes into contact with the receiving member 80 from above. Thus, the front second arm 41 is supported by the receiving member 80, and the falling of the forearm member 36 can be prevented.

(tension wheel)

As shown in fig. 10 and 11, the tension pulley 15 includes a hub portion 81 and a roller portion 82.

The hub portion 81 is supported by a support shaft 84 via a pair of left and right bearings 83 so as to be rotatable about an axial center X6. Oil seals 85 are provided between the support shaft 84 and the left and right ends of the hub portion 81.

A gasket 86 is provided between the inner end of the hub portion 81 in the lateral direction of the machine body and the oil seal 85. Washer 86 is held by snap ring 87. An O-ring 88 is provided between the body transverse inner end of the hub portion 81 and the washer 86.

A flange portion 81A is formed at a substantially central portion in the axial center X6 direction of the outer peripheral portion of the hub portion 81. The flange portion 81A is formed in a substantially circular shape when viewed from the side. The flange portion 81A is formed so as to surround the entire circumference of the outer peripheral portion of the boss portion 81. The flange portion 81A is formed with bolt holes 81A corresponding to the bolts 89 (corresponding to the "fasteners" of the present invention). The flange 81A is provided with a drain plug 90.

A pair of left and right bearings 83 is fitted to the outside of a substantially central portion of the support shaft 84 in the direction of the axis X6. The pair of left and right bearings 83 are fixed by a pair of left and right snap rings 91 in a state of being externally fitted to the support shaft 84.

A thrust washer 92 is fitted around a portion of the support shaft 84 located between the pair of left and right bearings 83. The oil seal 85, the washer 93, and the cover 94 are fitted to the left and right sides of the support shaft 84, which sandwich the pair of left and right bearings 83, in this order from the side closer to the bearings 83.

A lubricant oil connection pipe 95 is provided at the lateral outer end of the body of the support shaft 84.

The lubricating oil is injected into the bearing chamber 96 from the lubricating oil connection pipe 95, and air or the like is discharged to the outside from the drain plug 90.

The roller portion 82 is attached to the outer peripheral portion of the boss portion 81 and acts on the crawler belt 18. The roller portion 82 is configured such that two divided roller bodies 97 are arranged in the circumferential direction. The one split roller 97 and the other split roller 97 have the same structure.

The dividing roller 97 has: a winding portion 97A around which the crawler belt 18 is wound; a base 97B attached to an outer peripheral portion of the boss portion 81; the circular plate portion 97C bridges the winding portion 97A and the base portion 97B. The base portion 97B of one of the divided roller bodies 97 and the base portion 97B of the other divided roller body 97 are aligned to form a base portion having a hub shape along the outer peripheral shape of the hub portion 81.

The disk portion 97C is formed with bolt holes 97a corresponding to the bolts 89. A concave portion 97b recessed to the opposite side of the flange portion 81A is formed in the side portion of the inner peripheral portion of the disk portion 97C opposite to the flange portion 81A. The recess 97b is formed in a shape corresponding to the shape of the flange 81A.

(connection structure between flange part and split roller body)

The flange 81A and the dividing roller 97 have a convex-concave structure St (a flange 81A and a concave 97b as convex portions) at a connection portion therebetween. The bolt 89, the bolt hole 81a (boss portion 81), and the bolt hole 97a (roller portion 82) constitute a coupling portion C.

The concave portion 97b of the split roller 97 is fitted to the flange portion 81A, and the split roller 97 is fixed to the flange portion 81A from the lateral outside of the machine body in a state of being in contact with the lateral outside of the machine body by the bolt 89. At the coupling portion between the flange portion 81A and the split roller 97, the thickness W1 of the flange portion 81A is set to be thicker than the thickness W2 of the disk portion 97C.

(bearing part)

As shown in fig. 11 to 13, a two-fork shaped support portion 19A is formed at the tip end portion of the tension frame 19, and the support portion 19A supports both left and right end portions of the support shaft 84 in a state where the tension pulley 15 is sandwiched from both sides (both left and right sides) in the axial center X6 (corresponding to the "rotation axial center" of the present invention) direction of the tension pulley 15. The support portion 19A is formed with a pair of left and right cut portions 19A into which both left and right end portions of the support shaft 84 are inserted and supported. The cut portion 19a cuts into the tension pulley 15 in the direction opposite to (forward of) the direction in which the tension is applied. The support shaft 84 is inserted into and supported by the pair of left and right notches 19A at both left and right ends of the support shaft 84, and is fixed to the support portion 19A from the lateral outside of the machine body by a flat washer 98, a spring washer 99, and a nut 100.

Support portion 19A is formed with ceiling portion 19b covering a space between the upper portion of the two-pronged base end portion of support portion 19A and roller portion 82 from above. In a plan view, ceiling portion 19b protrudes from the base end portion of the two-pronged shape of support portion 19A toward the tip end portion so as to overlap the outer peripheral portion (winding portion 97A) of roller portion 82. The top end of the ceiling portion 19b is located at a position not to enter the rotation locus of the outer peripheral end of the roller portion 82.

(method of removing tension pulley)

First, as shown in fig. 14 and 15, the tension bolt 30 is rotated to move the tension frame 19 forward, thereby releasing the tension applied to the crawler belt 18. Thereby, a gap for removing the idler 15 is formed between the roller portion 82 and the crawler 18. Then, the bolts 89 are loosened from the lateral outside of the machine body, and the divided roller bodies 97 on the rear side of the roller portion 82 with respect to the support shaft 84 are detached from the boss portion 81 toward the lateral outside of the machine body.

Then, as shown in fig. 16 and 17, the remaining division roller 97 is rotated to be positioned rearward with respect to the fulcrum 84. Then, the bolts 89 are loosened from the lateral outside of the machine body, and the remaining divided roller bodies 97 are removed from the boss portion 81 to the lateral outside of the machine body.

Finally, as shown in fig. 18 and 19, the nut 100 is removed, and the support shaft 84 is pulled out rearward from the pair of cut-outs 19A, and the boss portion 81 is removed laterally outward from the support portion 19A.

(fulcrum construction of rear arm Member)

As shown in fig. 20 to 23, the rear arm fulcrum portion 61 includes a pair of left and right front frames 101 that support the rear boss portion 66. The rear sleeve portion 66 is provided so as to penetrate the pair of right and left front frames 101.

The pair of left and right front frames 101 are provided to sandwich the main frames 10 and 13 from both left and right sides. The front frame 101 is welded and fixed to the main frames 10, 13. The front frame 101 extends forward from the rear sleeve portion 66 side to a position further forward than the rear cross frame 12. The front frame 101 extends forward, thereby dispersing and transmitting the stress to the front side.

A bottom plate 102 is provided so as to extend across a portion of the pair of right and left front frames 101 on the rear side of the rear cross frame 12. An intermediate plate 103 is provided so as to straddle the rear end portions of the pair of right and left front frames 101. The rear end of the front frame 101 is fixed to the intermediate plate 103 by welding.

A linking plate 104 is provided so as to extend across the body lateral outer side end portion of the rear lateral frame 12 and the rear sleeve portion 66. A top plate 105 and a bottom plate 106 are provided so as to straddle the linking plate 104 and the front frame 101 on the lateral outer side of the machine body.

Reinforcing ribs 107 for reinforcement are provided between the lateral outer surface of the main frame 13 on the machine body side and the front surface of the rear lateral frame 12, and between the lateral outer surface of the front frame 101 on the lateral outer side of the machine body side and the front surface of the rear lateral frame 12, respectively. Reinforcing ribs 108 for reinforcement are provided between the pair of left and right front frames 101 and between the connecting plate 104 and the front frame 101 on the lateral outer side of the machine body.

A lateral reinforcement plate 109 is provided so as to straddle the pair of left and right rear arm fulcrum portions 61. The lateral reinforcing plate 109 extends in the body left-right direction along the lower surface of the rear lateral frame 12. The lateral reinforcing plate 109 is formed by bending such that the rear end portion of the lateral reinforcing plate 109 is inclined rearward and downward. The lateral reinforcing plate 109 is formed to have a wide width at both left and right ends, and is welded and fixed to the front frame 101 on the lateral inner side of the machine body. The pair of left and right rear arm fulcrum portions 61, the main frame 13, and the rear lateral frame 12 are integrated by the lateral reinforcing plate 109, and the strength of these members as a frame is improved.

A pair of left and right rear frames 110 are provided on the rear side of the rear sleeve portion 66 so as to sandwich the main frame 10 from both the left and right sides. The rear frame 110 is welded and fixed to the main frame 10. The rear frame 110 extends rearward from the rear sleeve portion 66 side. The length of the rear frame 110 (the length in the front-rear direction of the machine body) is shortened, and the torque acting on the rear frame 110 (the torque around the shaft center X4) is reduced.

The front end of the rear frame 110 is welded and fixed to the intermediate plate 103. Bent portions 110a, 110b, and 110c are formed at the front end portion, the intermediate portion, and the rear end portion of the rear frame 110 in the front-rear direction, respectively. The stress is dispersed by the bent portions 110a, 110b, and 110 c.

A front extension 110d and a rear extension 110e are formed at the front end and the rear end of the rear frame 110, respectively. The front extension portion 110d extends forward to below the rear arm fulcrum portion 61 and is welded and fixed to the rear arm fulcrum portion 61, thereby improving the strength of the coupling portion between the rear frame 110 and the rear arm fulcrum portion 61. The rear extension 110e extends rearward and is welded and fixed to the main frame 10, so that stress is transmitted to a position away from the rear arm fulcrum 61 after being dispersed. Reinforcing ribs 111 are provided between the pair of right and left front extending portions 110 d.

A bottom plate 112 is provided so as to straddle the pair of right and left rear frames 110. The base plate 112 is welded and fixed to the rear frame 110, so that stress is transmitted to a position away from the rear arm fulcrum portion 61.

(oil supply structure of transmission case)

As shown in fig. 24, a case 114 communicates with the transmission case 6 via an oil supply pipe 113. Oil is stored in tank 114, and the oil in tank 114 is supplied to transmission case 6 via oil supply pipe 113. An oil supply plug 115 is provided at an upper portion of the tank 114. The tank 114 is supported by a tread frame 116.

The tank 114 is marked with, for example, an upper limit position H and a lower limit position L as marks indicating the oil level position. This makes it possible to observe the oil level in tank 114 and appropriately control the amount of oil in tank 114 so that the oil level is within the range between upper limit position H and lower limit position L.

Here, when the gears (not shown) in the transmission case 6 rotate in a state where the oil level in the transmission case 6 is lowered and an air layer is generated in the upper portion in the transmission case 6, the gears rotate together with the oil, and air bubbles are likely to be generated. Therefore, in the conventional technology, when the oil in the transmission case 6 is reduced and the oil level in the transmission case 6 is lowered, air is mixed into the oil, which adversely affects the operation of the crawler travel device 2 (for example, feeling (feeing) when the crawler travel device 2 rotates).

According to the present embodiment, since the oil in the case 114 is supplied to the transmission case 6 through the oil supply pipe 113, the oil in the transmission case 6 is kept in a full state, and the oil level in the transmission case 6 is not lowered. This can prevent air from being mixed into the oil and adversely affecting the operation of crawler belt traveling device 2.

(supporting structure of transmission case)

As shown in fig. 24 and 25, the transmission case 6 is supported by the front cross frame 11 via a diagonal frame 117. The inclined frame 117 is provided in a state of being inclined forward and upward across the left split case 6A and the front cross frame 11. The inclined frame 117 is formed of a groove-shaped member that opens downward. The rear end portion (end portion on the front lateral frame 11 side) of the inclined frame 117 is welded and fixed to the front lateral frame 11. A bracket 118 is fixed to a front end portion (an end portion on the left divided case 6A side) of the inclined frame 117 by a bolt 119.

The bracket 118 is fixed to the rear portion of the left split case 6A by a bolt 121. A reinforcing pipe body 120 is fitted around a portion of the bolt 119 located between the left and right side portions of the inclined frame 117.

The transmission case 6 assumes a tilted posture of tilting backward when viewed from the side. The transmission case 6 is supported by the front cross frame 11 near the transmission case 6 via the inclined frame 117 so that a member (the inclined frame 117 in the present embodiment) for supporting the transmission case 6 on the machine body frame 1 is shortened as much as possible.

When the left divided case 6A is detached from the right divided case 6B, as shown in fig. 26, first, the bolts 119 are loosened, and the bolts 119 and the pipe body 120 are detached. Thereby, the front end portion of the inclined frame 117 is opened, and the bolt 121 can be contacted from the lower opening of the inclined frame 117. Then, the bolts 121 are loosened to release the fixing of the bracket 118 to the left split case 6A. Finally, the left split case 6A can be detached from the right split case 6B to the lateral outside (left side) of the machine body by simply releasing the bolt fastening of the left split case 6A and the right split case 6B.

(other embodiment mode of the first embodiment mode)

(1) In the above embodiment, one of the divided roller bodies 97 and the other divided roller body 97 have the same structure, but a plurality of divided roller bodies may have different structures. The roller portion 82 may be formed of three or more divided roller bodies, or may be configured to be inseparable.

(2) In the above embodiment, the support shaft is inserted into and supported by the notch 19a, but may be inserted into and supported by a hole (circular hole, elongated hole, or the like).

(3) In the above embodiment, the flange portion 81A is formed so as to surround the entire circumference of the outer peripheral portion of the boss portion 81, but may be formed in a part of the outer peripheral portion of the boss portion 81.

(4) In the above embodiment, the support portion 19A has the ceiling portion 19b, but may not have the ceiling portion 19 b.

(5) In the above embodiment, the base portion 97B is formed on the inner peripheral portion of the roller portion 82 (divided roller body 97), but the base portion 97B may not be formed.

(6) In the above embodiment, the thickness W1 of the flange 81A is set to be thicker than the thickness W2 of the roller 82 (the circular plate 97C), but may be set to be the same thickness or may be set to be thinner than the thickness W2 of the roller 82 (the circular plate 97C).

(7) In the above embodiment, the concave-convex structure portion St is provided at the coupling portion between the flange portion 81A and the roller portion 82 (divided roller body 97), but the flange portion 81A and the roller portion 82 may be coupled so that the surfaces facing each other abut against each other.

(8) The uneven structure portion St is not limited to the form shown in the above embodiment, and various forms can be adopted. For example, the uneven structure portion St may have a form shown in fig. 27.

(9) In the above embodiment, the convex portion (the flange portion 81A) of the concavo-convex structure St is provided in the boss portion 81, and the concave portion 97b of the concavo-convex structure St is provided in the roller portion 82, but the concave portion of the concavo-convex structure St may be provided in the boss portion 81, and the convex portion of the concavo-convex structure St may be provided in the roller portion 82.

(10) The uneven structure portion sf (sb) is not limited to the form shown in the above embodiment, and various forms can be adopted. For example, the uneven structure portion sf (sb) may have the form shown in fig. 28.

(11) In the above embodiment, the convex portion of the concave-convex structure section Sf (the end portion on the inner side in the lateral direction of the front sleeve member 37) is provided in the front sleeve member 37, and the concave portion of the concave-convex structure section Sf (the sleeve portion 41a) is provided in the front arm member 36, but the concave portion of the concave-convex structure section Sf may be provided in the front sleeve member 37, and the convex portion of the concave-convex structure section Sf may be provided in the front arm member 36. Further, the convex portion of the concave-convex structure portion Sb (the body transverse inner end portion of the rear sleeve member 59) is provided on the rear sleeve member 59, and the concave portion of the concave-convex structure portion Sb (the sleeve portion 63a) is provided on the rear arm member 58, but the concave portion of the concave-convex structure portion Sb may be provided on the rear sleeve member 59, and the convex portion of the concave-convex structure portion Sb may be provided on the rear arm member 58.

(12) In the above embodiment, the O-ring 56(78) is provided between the sleeve portion 41a (63a) and the reduced diameter portion 37a (second reduced diameter portion 59b), but the O-ring 56(78) may be provided between the sleeve portion 41a (63a) and the front sleeve member 37 (rear sleeve member 59) without forming the reduced diameter portion 37a (second reduced diameter portion 59 b). Further, the O-ring 56(78) may not be provided.

(13) In the above embodiment, the receiving member 80 for the front arm member 36 is provided, and a receiving member for the rear arm member 58 may be provided instead of or in addition to this.

(second embodiment)

Next, an embodiment of a general-type combine harvester as an example of the harvester of the present invention will be described with reference to the drawings.

(Overall Structure)

Fig. 29 and 30 show a general type combine harvester which harvests crops such as rice and wheat. In this combine, a harvesting and conveying unit 203 is connected to a front portion of a traveling body provided with a pair of right and left crawler traveling devices 202 at a lower portion of a body frame 201 so as to be vertically swingable, and the harvesting and conveying unit 203 harvests standing straws of crops to be harvested and conveys them rearward. The travel machine body has a threshing device 204, a grain tank 205, a grain discharge device 206, a cab 207, and the like on the machine body frame 201. The threshing device 204 performs threshing processing on harvested grain stalks, which are crops transported from the harvesting transport unit 203, and sorts the threshing processed product obtained by the threshing processing into grains and a discharge. The grain tank 205 stores grains obtained by the threshing device 204. The grain discharging device 206 discharges the grains stored in the grain tank 205 outside the body. The driving unit 207 is used for an operator to board and perform driving operation. The combine harvester is of a full-feeding type, which cuts off the roots of the planted grain stalks for harvesting, and puts all the harvested grain stalks into the threshing device 204.

The driving part 207 is positioned at the right side of the front part of the machine body, and the grain box 205 is positioned at the rear part of the driving part 207. The threshing device 204 and the grain tank 205 are arranged in the left-right direction with the threshing device 204 on the left side and the grain tank 205 on the right side. Further, a driving engine 208 is provided below the driver 207.

In this embodiment, when the front-rear direction of the body is defined, the body is defined along the traveling direction in the working state, and when the left-right direction of the body is defined, the left-right direction is defined in a state viewed along the body traveling direction. That is, the direction indicated by reference numeral "F" in fig. 29 and 30 is the front side of the machine body, and the direction indicated by reference numeral "B" in fig. 29 and 30 is the rear side of the machine body. The direction indicated by the reference symbol "L" in fig. 30 is the left side of the body, and the direction indicated by the reference symbol "R" in fig. 30 is the right side of the body. Therefore, the body left-right direction corresponds to the body width direction.

The harvesting and conveying unit 203 includes: a harvesting unit 209 for harvesting the planted straw as a harvesting target as the vehicle body travels; and a feeder 210 for conveying the harvested straw harvested by the harvest processing unit 209 to the threshing device 204 on the rear side of the machine body. The harvesting and carrying section 203 is supported so as to be vertically swingable around a horizontal axis P1 by the telescopic operation of a hydraulic cylinder 211, the hydraulic cylinder 211 being erected so as to straddle the machine frame 201 and the feeder 210.

The harvesting unit 209 is supported by a frame support 217 composed of a connecting angle pipe, an L-shaped member having an L-shaped cross section, or the like. The harvesting unit 209 includes a pair of left and right grain dividers 213, a rotating drum 214, a harvesting blade 215, and a screw 216. The crop divider 213 divides crop from the crop stalks to be harvested and from the crop stalks to be harvested. The rotary drum 214 rakes the planted vertical straw as a harvest target rearward. The harvesting knife 215 is a pusher-type member for cutting off the root side of the planted straw to be harvested and harvesting the same. The screw 216 conveys the cut harvested stalks laterally to the middle side in the left-right direction, concentrates the stalks, and conveys the stalks rearward.

As shown in fig. 30, the left-right width (harvesting width) of the harvesting unit 209 is larger than the distance between the lateral outer ends of the left and right crawler traveling devices 202, in other words, larger than the width of the traveling machine body, so that the treading range of the left and right crawler traveling devices 202 on the harvesting trace of the planted crop by the harvesting unit 209 is largely secured in the left-right direction. This reduces the possibility that the left and right crawler travel devices 202 press on the unharvested crop during harvesting operation.

As described above, the left-right width of the harvest processing unit 209 is larger than the width of the traveling machine body, and since the driver 207 is located on the right side of the front of the machine body and the feeder 210 is located on the left side of the front of the machine body, the harvest processing unit 209 is connected to the feeder 210 in a state of being offset to one side (right side) in the machine body width direction with respect to the feeder 210.

As shown in fig. 30, the harvesting unit 209 has a pair of side walls 220 located at both side ends in the machine width direction. The left and right crop dividers 213 are disposed on the front side of the left and right side wall portions 220. The portion to which the feeder 210 is connected is opened in communication with the inlet 221 of the feeder 210 so that the harvested crop can be carried from the auger 216. A pusher-type harvesting knife 215 is provided so as to straddle the left and right side wall portions 220. The screw 216 is mounted so as to cross the left and right side wall portions 220 and to be rotatable about the lateral axis.

(rearview mirror)

As shown in fig. 42, the frame support 217 has an upper support 217A having an angular tube shape, and the upper support 217A is located at the rear upper portion of the harvesting processing portion 209 and extends in the left-right direction of the machine body. A mirror 288 is provided on the left side of the upper support body 217A, and the mirror 288 is supported by a support column 287 which extends and is fixed upward.

The mirror 288 has a mirror 289 facing rearward, so that a driver driving in the driver's part 207 can visually recognize a rear portion on the left side of the body. The rearview mirror 288 is supported so as to be vertically movable and swingable around the transverse axis P1 integrally with the harvesting unit 209. Further, the reflecting mirror 289 is constituted by a convex curved surface. With the above configuration, the visual field is enlarged, and the rear side can be visually observed regardless of whether the support column 287 is inclined or not, in the harvesting work position where the harvesting unit 209 is located on the lower side or in the raised position where the harvesting unit 209 is located on the upper side.

(rotating drum)

The rotary reel 214 will be explained below.

As shown in fig. 29 and 30, the rotating drum 214 is provided in a state of being supported by a pair of left and right support arms 222, the pair of left and right support arms 222 extending forward from an upper portion of the rear end side of the harvesting frame 212. As described below, the drum frame 224 is provided at the left and right end portions of the drive shaft 223 so as to be integrally rotatable, and the drive shaft 223 is rotatably supported by the distal end portions of the pair of support arms 222. The pair of left and right reel frames 224 are formed into a substantially hexagonal shape when viewed from the side. A tine support member 225 is provided so as to span the pair of left and right reel frames 224 and so as to be provided at 6 tops. A plurality of tines 226 (raking claws) are attached to each tine support member 225 so as to be aligned in the longitudinal direction of the tine support member 225.

The reel frame 224 has a posture holding mechanism for holding the posture of the tines 226, and thus can hold the posture in which the tines 226 extend downward from the tine support member 225 regardless of the rotation of the rotary reel 214. This attitude keeping mechanism is a known structure, and will not be described in detail, and when the rotary drum 214 rotates, the tines 226 can keep the downward attitude and rotate, and rake the planted grain stalks rearward.

As shown in fig. 29 and 31, a hydraulic cylinder 227 is coupled across each of the pair of support arms 222 and the side wall portion 220. The pair of support arms 222 are vertically swung about an axial center P2 on the rear base end side of the support arms 222 with respect to the harvesting frame 212 by the pair of hydraulic cylinders 227, whereby the rotating drum 214 is supported so as to be able to ascend and descend.

(screw machine)

The screw 216 will be explained below.

As shown in fig. 30 and 31, the screw 216 has a pair of left and right screw blades 260 on the outer periphery of the large-diameter cylindrical drum 259, and the pair of left and right screw blades 260 function to be laterally transferred toward the tip end of the feeder 210 as it rotates forward. In the area of the inlet 221 facing the front end of the feeder 210, a plurality of rod-shaped raked bodies 261 are provided which enter and exit from the drum 259. A rake body 261 that advances and retracts from the drum 259 is provided at a middle portion of the right lateral transfer area and a middle portion of the left lateral transfer area. Not described in detail, a plurality of raking bodies 261 are supported inside the drum to be slidably guided freely in and out of the drum 259 as the drum 259 rotates.

Not shown, when the drum 259 rotates, each rake body 261 follows, and the screw 216 rotates around the axis of an eccentric support shaft (not shown) different from the rotation axis of the drum 259. At this time, the distance between the eccentric support shaft and the drum 259 changes due to the change in the rotational phase, and each rake body 261 rotates while moving in and out of the drum 259, thereby raking the crop into the feeder 210 while avoiding interference with the bottom plate 218 and the back panel 219.

(feeder)

As shown in fig. 29, the feeder 210 has a pair of left and right endless rotating chains 285 wound around the feed box 282 in an angular cylindrical shape so as to straddle a drive wheel 283 located at the rear upper side and a driven wheel 284 located at the front lower side, and a locking carrier (not shown) is provided at a predetermined interval so as to straddle the pair of left and right endless rotating chains 285. An inlet 221 communicating with the harvest processing unit 209 is formed at the front end of the feed box 282. The rear end of the feeding box 282 is connected to the threshing device 204. Further, the rotation of the endless rotating chain 285 transports the harvested crop (harvested straw) received from the harvest processing unit 209 to the threshing device 204.

(harvesting knife)

The following explains the reception knife 215.

As shown in fig. 32, 35, and 36, the harvesting knife 215 includes a base 229, a receiving knife 230, a movable knife 231, a knife holder 232, and a knife holder body 233. The base 229 is an angular member that is fixedly attached to back the connecting frame 228 extending in the width direction of the machine body. The receiving blade 230 is attached to a base 229. The movable blade 231 is supported to be slidable with respect to the receiving blade 230. The knife handle 232 drives the movable knife 231. The blade holder 233 allows the movable blade 231 to slide and prevents it from floating upward and maintains its posture.

The power from the engine 208 is transmitted by a driving mechanism described below, the long knife holder 232 extending over the entire harvesting width is driven to reciprocate at predetermined intervals, the movable knife 231 fixed to the knife holder 232 by rivet connection reciprocates, and the roots of the harvested straw can be cut by cooperation with the fixed receiving knife 230 to harvest.

As shown in fig. 32, the movable knife 231 includes a right lateral transfer member 234 and a left lateral transfer member 235 as members for feeding the harvested straw to a middle portion (a portion to be transferred to the feeder 210) in the machine width direction, and the right lateral transfer member 234 is positioned on the right side and the left lateral transfer member 235 is positioned on the left side with respect to the portion to be transferred to the feeder 210 as viewed in the machine traveling direction.

As shown in fig. 35 and 36, the lateral transfer members 234 and 235 on both the left and right sides are 1 plate-shaped body including lateral transfer operation portions 234A and 235A and connection portions 234B and 235B that are elongated in the machine width direction and have zigzag upper sides. The coupling portions 234B and 235B are coupled to the knife holder 232 by bolts BL, and the lateral transfer members 234 and 235 move back and forth integrally with the knife holder 232 and the movable knife 231. When the coupling of the handle by the bolt BL is released, both the lateral transfer members 234 and 235 can be removed from the entire harvesting knife 215.

The lateral transfer acting portion 234A of the right lateral transfer member 234 sets the orientation of the saw teeth so as to transfer the harvested straw to the feeder 210 side, i.e., to the left. The lateral transfer action portion 235A of the left lateral transfer member 235 sets the orientation of the saw teeth so as to transfer the harvested straw to the feeder 210 side, i.e., to the right. Therefore, by moving the lateral transfer members 234 and 235 back and forth together with the movable knife 231 at a predetermined interval, the harvested straw can be fed to the middle side in the machine width direction, that is, to the portion to be transferred to the feeder 210.

The left and right lateral transfer members 234 and 235 are provided so as to extend along the harvesting knife 215 toward the rear of the machine body, and are connected to the harvesting knife 215 in an inclined posture such that the closer to the rear, the closer to the upper side. The inclination angle with respect to the harvesting knife 215 is set gently (about 10 degrees) so as not to hinder the transportation of the harvested straws. Further, the rear end of the base 229 is extended toward the rear of the machine body, so that the function of delivering the harvested straw is enhanced.

As described above, when the bolt connection to the knife holder 232 is released, both the lateral transfer members 234 and 235 can be detached from the harvesting knife 215. In addition, when the connection with the driving mechanism described below is released and the lateral transfer members 234 and 235 are removed during maintenance work such as repair and replacement of the movable knife, the movable knife 231 and the holder 232 can be pulled out to one side in the left-right direction while maintaining the connected state.

(Driving mechanism of harvesting knife)

Next, a driving mechanism of the harvesting knife 215 will be explained.

As shown in fig. 31 and 34, the drive mechanism of the harvesting knife 215 includes a harvesting drive shaft 237, a power conversion mechanism 238, a relay drive shaft 239, a swing arm 240, and a link 241. The reaping drive shaft 237 extends in the machine body width direction on the rear side of the back panel 219. The power conversion mechanism 238 converts the rotational power around the horizontal axis into power around the front and rear axes. The relay transmission shaft 239 rotates by the converted power and extends in the front-rear direction. The swing arm 240 is provided at a front end portion of the relay transmission shaft 239. The link 241 links the swing arm 240 and the knife 232. The harvest drive shaft 237 extends from the right side of the feeder to the right side wall portion of the harvest processing unit, and the right side wall portion 220 includes a power conversion mechanism 238, a relay drive shaft 239, a swing arm 240, and the like.

The power of the engine 208 is transmitted to the harvesting drive shaft 237 via a transmission mechanism not shown, and the harvesting drive shaft 237 is rotationally driven around the lateral axis. The power conversion mechanism 238 is a known structure, and therefore, a detailed structure is not described, and the harvesting drive shaft 237 and the relay drive shaft 239 are coupled so as to convert the unidirectional rotational motion of the harvesting drive shaft 237 into the reciprocating rotational motion of the relay drive shaft 239.

The swing arm 240 is integrally pivotally connected to a distal end portion of the relay transmission shaft 239. As shown in fig. 33 and 34, the swing arm 240 is rotatably connected to one end of a link 241 via a first bearing member 242. The other end of the link 241 is coupled to the movable blade 231 via a second bearing member 243. When the relay transmission shaft 239 reciprocates, the swing arm 240 swings left and right, and the movable blade 231 is driven to reciprocate left and right.

As shown in fig. 33, the right side wall portion 220 has a support portion 245 projecting outward in the machine body width direction, and the relay transmission shaft 239 is inserted through an insertion hole 246 formed in the support portion 245 in the front-rear direction. The relay transmission shaft 239 is rotatably supported by a bearing 248 housed in a bearing holder 247 attached to the front side of the support portion 245.

As shown in fig. 31 and 33, a harvesting knife guard 249 for protecting the harvesting knife 215 is provided on the outer side of the harvesting knife 215 in the machine width direction. The harvesting blade guard 249 includes a plate member 250 having a plate shape and a round bar member 251. The round bar member 251 is fixed to the rear side of the plate member 250 by welding or the like. The round bar member 251 is a member having a horizontal U-shape with its front side open when viewed from the side. The front end of the plate member 250 is connected to the side wall 220 by a bolt on the front side of the knife guard 249. The rear side of the knife guard 249 is bolted to the side surface of the support portion 245 via a bracket 252 connected to the round bar member 251.

(Divider)

The next explanation is given to the cereal divider 213.

The divider 213 includes a divider body 213A located on the upper side and a bottom divided body 213B detachably attached to the lower side of the divider body 213A. Further, the divider body 213A is located at a position higher than the harvesting knife 215 at the lower edge portion of the divider body 213A. The bottom divided body 213B is positioned on the front side of the machine body with respect to the cutting knife 215, and the lower edge of the bottom divided body 213B is positioned lower than the cutting knife 215.

Fig. 38 and 39 show the crop divider body 213A. The divider body 213A is integrally formed by a plate body with a vertical surface 290 having a substantially triangular shape in side view and an upper surface 291 having a triangular shape in plan view and continuing to the upper side of the vertical surface 290, and has a reinforcing body 292 formed by bending a round bar along the lower edge of the vertical surface 290. A rear coupling portion 293 for coupling to the side wall portion 220 is provided on the rear side of the vertical surface portion 290. The outer inclined guide 294 has an inclined posture on the right side of the vertical surface 290, and the outer inclined guide 294 is along the lower end edge of the vertical surface 290 in a side view and is located on the right side closer to the rear side in a plan view. The upper end of the rear connecting portion 293 is bent into a substantially L-shape when viewed from the side. The divider bodies 213A of the left and right dividers 213 are configured to be inverted in the left-right direction, but have the same configuration.

As shown in fig. 33 and 37, a rear connection portion 293 of the crop divider main body 213A is attached to the front surface portion 220A of the side wall portion 220. The side wall portion 220 has a wall portion constituting body 220B, and the wall portion constituting body 220B is a plate body formed with a wall surface continuous with the vertical surface portion 290 of the crop divider main body 213A in the machine front-rear direction. The upper edge portion 220C of the side wall portion 220 is continuous with the upper surface portion 291 of the crop divider main body 213A in the front-rear direction of the machine body, and has an inclined portion 220D in an inclined posture at a portion continuous from the lower end portion of the front surface portion 220A of the side wall portion 220 toward the rear side of the machine body, and the inclined portion 220D is located closer to the lower side toward the rear side of the machine body.

The vertical width of the rear connecting portion 293 positioned on the rear side of the crop divider body 213A is substantially the same as the front surface portion 220A of the side wall portion 220. In a state where only the divider body 213A is connected to the side wall portion 220, as shown in fig. 37, the lower end edge 290b of the vertical surface portion 290 of the divider body 213A is located at an upper position higher than the lower end portion 220E of the side wall portion 220 by a predetermined height. When the harvesting processing unit 209 is in the harvesting position close to the ground, the lower end edge 290b of the vertical surface 290 of the crop divider body 213A is located at a position higher than the ground by a predetermined height, and assumes a substantially horizontal posture.

In a working condition in which crops planted in a farm field do not fall down, as shown in fig. 37, by performing the working in a state in which the bottom cutting body 213B is not attached to the lower portion of the crop divider main body 213A, it is possible to prevent the lower end portion of the crop divider 213 (crop divider main body 213A) from contacting the ground when crops are harvested at a position close to the ridge.

The bottom divided body 213B will be explained below.

As shown in fig. 40 and 41, the bottom segment 213B is a plate body formed in a substantially rhombic shape when viewed from the side, and a reinforcing body 295 formed of a round bar is connected along the lower edge portion. The upper front portion of the bottom divided body 213B is bolted to the vertical surface 290 of the crop divider body 213A, and the upper rear portion is bolted to the wall portion constituting body 220B of the side wall portion 220. The coupling bolt 296 is attached and welded from the inside of the body in the left-right direction.

As shown in fig. 31 and 33, when the bottom divided body 213B is attached, the bottom divided body 213B is connected in a plate shape to the divider body 213A and the wall part constituting body 220B of the side wall part 220. By attaching the bottom segment 213B, most of the space formed below the divider body 213A is closed, and the bottom surface of the side wall 220 and the bottom surface of the bottom segment are continuous. As shown in fig. 31, the front end edge 297 of the bottom divided body 213B is located at a position closer to the rear side of the machine body than the front end edge 298 of the divider body 213A, and a notched portion 299 stepped in side view is formed on the front lower side of the divider body 213A. The bottom divided body 213B is positioned on the front side of the machine body with respect to the cutting blade 215, and the lower edge of the bottom divided body 213B is positioned lower than the cutting blade 215.

In the case of a work in which a crop planted in a farm field falls, the work is performed in a state in which the bottom cutting body 213B is attached to the lower portion of the crop divider main body 213A, so that it is possible to avoid a problem that the fallen crop passes through a space below the crop divider 213 and the crop is retracted and remains in the crop. In addition, when the crop plants are laid down, the water content of the farmland is generally high and the ground surface is soft, so that the lower end portion of the crop divider 213 is less likely to be damaged by contact with the ground surface.

(inclined guide body)

The tilt guide body 200 having a tilted posture at a portion on the front lower portion of the right side wall portion 220 and on the inner side in the machine width direction is disposed such that the tilt guide body 200 is closer to the machine width direction inner side as it is closer to the machine body rear side in a plan view. The tilt guide 200 is provided in a rear-lower tilt posture in which the rear side of the body is closer to the lower side when viewed from the side.

As shown in fig. 33, the inclination guide 200 forms a bolt coupling portion 200A by pressing one end portion of a round pipe member into a flat shape. As shown in fig. 40 and 41, when the bottom divided body 213B is attached, the bolt coupling portion 200A is bolted to the wall portion constituting body 220B of the side wall portion 220 in a state of being screwed together with the upper front-rear middle portion side portion of the bottom divided body 213B. The bolt coupling portion 200A is coupled and supported by a bolt, and the rear side is extended in a cantilever shape so as to have an inner inclined posture in which the rear side of the machine body is closer to the inner side in the machine body width direction in a plan view and a rear downward inclined posture in which the rear side of the machine body is closer to the lower side in a side view. The rear end 200B of the tilt guide body 200 is engaged and coupled to and held in position so as to be fitted to the end of the 3 rd receiving blade 230 from the right.

As shown in fig. 37, in a state where the bottom partition body 213B is detached, only the tilt guide body 200 is bolted to the wall portion constituting body 220B of the side wall portion 220. The two points of the cantilever extension and the engagement and connection of the tip end portion to the receiving blade 230 are the same as those in the case where the bottom partition 213B is attached.

(other embodiment mode of the second embodiment mode)

(1) In the above embodiment, the front end edge of the bottom divided body is located on the rear side of the machine body with respect to the front end edge of the divider body, and the notch portion having a step shape when viewed from the side is formed on the front lower side of the divider body.

(2) In the above embodiment, the tilt guide body 200 is provided, and the tilt guide body 200 may not be provided.

(3) In the above-described embodiment, an example of application to a general-type combine harvester for harvesting rice, wheat, and the like is shown, but the present invention can also be applied to other types of harvesters such as a corn harvester.

(third embodiment)

An embodiment of the combine harvester of the present invention will be described below with reference to the accompanying drawings.

(Overall Structure)

Fig. 43 and 44 show a general combine harvester which harvests crops such as rice and wheat. In this combine harvester, a harvesting and conveying unit 303 is connected to the front part of a traveling machine body V so as to be able to swing up and down, the traveling machine body V is provided with a pair of right and left crawler type traveling devices 302 at the lower part of a machine body frame 301, and the harvesting and conveying unit 303 harvests standing straws of crops to be harvested and conveys them rearward. The travel machine body V has a threshing device 304, a grain tank 305, a grain discharge device 306, a steering portion 307, and the like on the machine body frame 301. The threshing device 304 performs threshing processing on harvested grain stalks, which are crops transported from the harvesting transport unit 303, and sorts the threshed products obtained by the threshing processing into grains and waste grass. The grain tank 305 stores grains obtained by the threshing device 304. The grain discharging device 306 discharges grains stored in the grain tank 305 outside the body. The driving unit 307 allows the driver to ride and perform driving operations.

The steering part 307 is located on the right side of the front part of the machine body, and a grain box 305 is provided behind the steering part 307. Further, a driving engine 308 is provided below the driver 307. The traveling machine body V has a threshing device 304 and a grain tank 305 arranged in the left-right direction with the threshing device 304 on the left side and the grain tank 305 on the right side. As shown in fig. 45, the threshing device 304 is provided on the traveling machine body V in a state of being shifted to the left side with respect to the center position in the machine body width direction.

The combine is of a full-feed type, which cuts off the roots of the planted grain stalks for harvesting, and puts all the harvested grain stalks into the threshing device 304.

In this embodiment, when the front-rear direction of the machine body is defined, the machine body is defined along the traveling direction in the working state, and when the left-right direction of the machine body is defined, the left-right direction is defined in a state viewed along the traveling direction of the machine body. That is, the direction indicated by reference numeral "F" in fig. 43 and 44 is the front side of the machine body, and the direction indicated by reference numeral "B" in fig. 43 and 44 is the rear side of the machine body. The direction indicated by reference numeral "L" in fig. 44 is the left side of the body, and the direction indicated by reference numeral "R" in fig. 44 is the right side of the body. Therefore, the body left-right direction corresponds to the body width direction.

The harvesting and conveying unit 303 includes: a harvesting processing part 309 for harvesting and planting vertical grain stalks along with the running of the machine body; and a feeder 310 that conveys the harvested straw harvested by the harvest processing unit 309 to the threshing device 304 on the rear side of the machine body. The harvest transport unit 303 is supported so as to be vertically swingable around a horizontal axis P1 by telescopic operation of a harvest lifting/lowering hydraulic cylinder 311, the hydraulic cylinder 311 being mounted so as to straddle the body frame 301 and the feeder 310.

The harvesting unit 309 includes a harvesting frame 312, a pair of left and right crop dividers 313, a rotating reel 314, a harvesting knife 315, and a screw 316. The harvesting frame 312 is a frame body that supports the entire harvesting unit 309. The crop divider 313 divides crop from the crop-planted straw that is the subject of harvesting and from the crop-planted straw that is not the subject of harvesting. The rotary drum 314 rakes the planted vertical straw as a harvesting object rearward. The harvesting knife 315 is a pusher-type member that cuts the root side of the planted straw as a harvesting target to harvest. The screw 316 laterally transfers and gathers the cut harvested straws to the middle side in the left-right direction, and sends out the harvested straws to the rear side.

As shown in fig. 43, in the feeder 310, a pair of left and right endless rotating chains 320 is wound around a drive wheel 318 located on the rear upper side and a driven wheel 319 located on the front lower side in an angular cylindrical feed box 317, and a locking conveyance body 320a (see fig. 46) is provided so as to straddle the pair of left and right endless rotating chains 320 with a predetermined space therebetween. An inlet communicating with the harvest processing unit 309 is formed at the front end of the feed tank 317, and the rear end of the feed tank 317 is connected to the threshing device 304. Then, the annular rotating chain 320 is rotated, whereby the harvested crop (harvested straw) transferred from the harvest processing unit 309 is transported to the threshing device 304.

(threshing device)

The threshing device 304 will be explained below.

As shown in fig. 46 and 47, the threshing device 304 includes side wall portions 324 and 325 (see fig. 47) located on both left and right sides, a front wall portion 326 located at a front end portion, a rear wall portion 327 (see fig. 46) located at a rear end portion, and a top plate 321 located at an upper portion. In an inner space formed inside the threshing device 304, a threshing chamber 328 is provided at an upper portion, a sorting unit 329 is provided below the threshing chamber 328, and the harvested straw is supplied into the threshing chamber 328 from an inlet portion 330 at a front end by the conveyance of the feeder 310.

The threshing chamber 328 has a threshing cylinder 322 therein, and the threshing cylinder 322 is rotationally driven around a horizontally oriented axis Y1 that is oriented forward and backward of the machine body, thereby threshing the crop. The threshing cylinder 322 has a threshing cylinder shaft 331, the threshing cylinder shaft 331 is supported so as to freely rotate around a horizontal axis Y1 across a front wall portion 326 and a rear wall portion 327, and the threshing cylinder 322 integrally rotates around the threshing cylinder shaft 331. The threshing cylinder shaft 331 is rotationally driven by power from the motor 308. The threshing cylinder 322 is driven to rotate rightward (clockwise) when viewed from the front of the machine body.

The threshing cylinder 322 has a plurality of support plates 332, a plurality of support rods 333, and threshing teeth 334. The support plate 332 is formed in a disk shape, and is connected and fixed to the threshing cylinder shaft 331 so as to be rotatable integrally therewith. The support rods 333 are arranged at equal intervals in the circumferential direction of the threshing cylinder 322, and are connected to the support plates 332. The threshing teeth 334 are bar-shaped members that protrude toward the outer peripheral side of the threshing cylinder 322 from a plurality of locations that are aligned along the axial direction of the support rods 333.

The threshing cylinder 322 has an arc-shaped receiving net 323 at a lower half-circumference portion of the outer circumference thereof. Not described in detail, the receiving net 323 is a net body having a known structure, and includes a plurality of arc-shaped cross members and a plurality of vertical members extending in the axial direction and connecting the cross members, and a plurality of through holes for passing grains therethrough. A dust feed valve 335 is provided on a ceiling plate covering the upper part of the threshing chamber 328, and the dust feed valve 335 feeds and guides the processed material to the rear side of the machine body along the rotation axis direction of the threshing cylinder 322 in accordance with the rotation of the threshing cylinder 322.

As shown in fig. 46, the sorting unit 329 located below the threshing chamber 328 includes a swing sorting device 336, a primary-material collecting unit 337, a secondary-material collecting unit 338, and a wind turbine 339. The swing sorting device 336 performs a sorting process while transferring the processed object that leaks from the receiving net 323 to the lower side. The primary product collecting unit 337 collects grains as primary products leaked from the swing sorting device 336. The secondary material collecting unit 338 collects secondary materials such as grain with branches leaked from the swing sorting device 336. The windmills 339 provide sort air to the oscillating sorting device 336. The windmill 339 generates the classifying air in accordance with the rotation of the windmill shaft 339a, wherein the windmill shaft 339a is a rotating shaft provided in a state of passing through the threshing device 304 in the lateral direction.

The primary product collecting unit 337 conveys the collected grains to the outside of the lateral side of the thresher 304 by the lateral transfer screw 337 a. The grains collected by the primary product collecting unit 337 are conveyed to the outside of the lateral side of the threshing device 304, and then conveyed upward by the grain conveying device 340 (see fig. 44) and stored in the grain box 305.

The secondary-material collection unit 338 conveys the collected secondary materials to the outside of the lateral side of the thresher 304 by the lateral transfer screw 338 a. The secondary material recovered by the secondary material recovery unit 338 is conveyed to the outside of the lateral side of the threshing device 304, and then returned to the threshing chamber 328 by the secondary material return unit 341 to be subjected to threshing again.

The swing type sorting device 336 has a screen box 342 having a rectangular frame shape in a plan view, and the screen box 342 includes a first grain tray 343, a second grain tray 344, a screen line 345, a chaff screen 346, a grain screen 347, a straw screen 348, and the like.

The screen box 342 is supported at the front side of the machine body so as to be slidable in the front-rear direction by a slide support mechanism, not shown, and a crank type swing drive portion 352 is provided at the lower portion of the rear side of the machine body of the screen box 342. By the operation of the swing drive portion 352, the rear portion of the screen box 342 is driven to swing in a circular motion. Therefore, the sieve box 342 as a whole performs a back-and-forth swinging motion having a motion component in the up-and-down direction.

The first grain pan 343 is formed of a plate body formed into a substantially corrugated shape when viewed from the side, is provided at the upstream end (front end) of the swing sorting device 336 in the transfer direction of the processed objects, and transfers the processed objects leaking from the upstream side of the threshing chamber 328 in the transfer direction to the rear.

The screen line 345 is formed of a piano line or the like, extends in a cantilever shape from the end portion on the downstream side in the transfer direction of the first grain tray 343 to the downstream side in the transfer direction, transfers the processed object fed from the first grain tray 343 to the rear side, and allows the grains and the secondary object to leak downward.

The second grain tray 344 is formed of a plate member formed in a substantially corrugated shape when viewed from the side, as in the first grain tray 343, is positioned on the downstream side in the transfer direction of the first grain tray 343 and on the lower side, and transfers the processed matter that has leaked from the downstream side in the processed matter transfer direction of the first grain tray 343 and the processed matter that has leaked from the screen line 345 to the rear.

The chaff screen 346 is located on the downstream side in the transfer direction of the second grain pan 344, and causes the processed matter fed from the second grain pan 344, the processed matter leaked from the screen line 345, and the processed matter leaked from the receiving net 323 of the threshing chamber 328 to leak downward while being transferred in a swinging manner.

The grain sieve 347 is made of a corrugated wire mesh having a plurality of grain-passing openings, is located below the chaff sieve 346, and is supported so as to straddle the left and right side plates of the sieve box 342. The grain sieve 347 allows grains to leak to the primary-matter collecting portion 337 below while swinging and transferring the processed matter leaking from the husk sieve 346, and transfers the secondary matter to the secondary-matter collecting portion 338 on the downstream side in the transfer direction.

The straw screen 348 is disposed on the downstream side in the transfer direction of the chaff screen 346. The straw screen 348 is formed of a plurality of plate bodies formed in a zigzag shape, and is capable of receiving the processed object and swinging and transferring the processed object rearward. The waste grass and other treated matter that has not leaked through the straw screen 348 is discharged to the outside through the rear dust discharge port.

(Transmission structure)

As shown in fig. 51, the power from the engine 308 disposed below the steering unit 307 on the right side of the machine body is transmitted to the left side of the threshing device 304 via the windmill shaft 339a, and is transmitted from the windmill shaft 339a to each part of the threshing device 304, i.e., the primary-material collecting unit 337, the secondary-material collecting unit 338, and the swing drive unit 352, via the belt transmission mechanism 355 for threshing disposed on the left side of the threshing device 304.

As shown in fig. 52 and 53, power is transmitted from the left end of the windmill shaft 339a to the intermediate transmission shaft 357 for driving the threshing cylinder via the first belt transmission mechanism 356. Power is transmitted from the relay drive shaft 357 to the feeder drive shaft 359 via the second belt drive mechanism 358. Although not shown, power is transmitted from the feeder drive shaft 359 to each part of the harvesting conveyor 303.

The first belt transmission 356 includes a first drive pulley 360 provided on the windmill shaft 339a, a first driven pulley 361 provided on the relay transmission shaft 357, a first belt 362 wound around the first drive pulley 360 and the first driven pulley 361, and a tension mechanism 363 configured to apply tension to the first belt 362. The first belt drive 356 is given a tension by the tension mechanism 363, and is always kept in a drive state.

The second belt transmission mechanism 358 has a second drive pulley 364 provided on the relay transmission shaft 357, a second driven pulley 365 provided on the feeder drive shaft 359, a second transmission belt 366 wrapped around the second drive pulley 364 and the second driven pulley 365, a tension pulley body 367, and a tension arm 368 supporting the tension pulley body 367. The tension arm 368 is externally fitted to the relay drive shaft 357 in a freely swinging manner. When the reaping clutch lever 369 provided in the steering portion 307 is operated to perform a pulling operation via the operation wire 370, the tension arm 368 swings to give a tension to the second belt 366, and when the pulling operation is released, the tension state is released. The tension wheel body 367 is biased toward the tension releasing side by the spring 371.

Therefore, the second belt transmission mechanism 358 constitutes a belt-tensioned harvesting clutch that can be freely switched between a connected state in which power is transmitted to the harvesting processing unit 309 and a disconnected state in which power transmission is not performed, in accordance with an operation of the harvesting clutch lever 369.

The tension wheel body 367 is supported by a support shaft 372 provided in a state in which the tension arm 368 is inserted, the support shaft 372 projects toward the opposite side of the tension wheel body 367, and the operation wire 370 is connected to a projecting portion on the opposite side of the support shaft 372 via a spring 373 for stroke absorption. As described above, the support shaft 372 serves as the wire connecting portion, and the supporting structure of the tension wheel body 367 can be simplified.

The second belt transmission 358 is disposed on the lateral outer side of the threshing device 304 with respect to the first belt transmission 356. The second belt transmission mechanism 358 is more frequent in maintenance work such as replacement of the belt than the first belt transmission mechanism 356. Here, by providing the second belt transmission mechanism 358 at a position further to the outside than the first belt transmission mechanism 356, maintenance work such as repair and inspection of the second belt transmission mechanism 358 can be easily performed from the outside of the machine body.

The wire receiving member 374 that supports the outer end of the operating wire 370 is attached to a support bracket 375 that extends in a cantilever manner from the side wall portion 324 of the threshing device 304. As shown in fig. 54, the wire receiving member 374 is formed by bending a band plate in a substantially zigzag shape so as to extend further laterally outward from a position connected to the support bracket 375 and to extend in a direction approaching the tension arm 368. Even if the second belt transmission mechanism 358 is located at a position separated outward from the side wall portion 324 of the threshing device 304, the opening and closing operation of the harvesting clutch can be smoothly performed by directly pulling the operation wire 370.

(cover of threshing device)

As described above, as shown in fig. 50, the threshing device 304 includes the belt transmission mechanism 355, the first belt transmission mechanism 356, the second belt transmission mechanism 358, and the like for threshing on the left outer side, and further includes the first cover 376, the second cover 377, and the third cover 378 made of synthetic resin which cover the outer sides of these components. A fourth cover 379 covering the outer side of the threshing chamber 328 is provided at a position corresponding to the threshing chamber 328.

As shown in fig. 52 and 55, the first cover 376, the second cover 377, and the third cover 378 are configured such that a locking member 380 provided on a lower portion thereof is hooked on and locked to a locking portion 381 provided on the side wall portion 324, and an upper portion thereof is fastened and fixed to a fixing portion 383 provided on the side wall portion 324 by a knob bolt 382. When the knob bolt 382 is released from being tightened, the covers 376, 377, and 378 are able to swing freely about the front-rear axis Y3 by the locking portion 381, and can be easily removed.

As shown in fig. 52, 55, and 57, the second cover 377 and the third cover 378 positioned on the lower side of the three covers 376, 377, and 378 are shaped so as to be recessed inward of the body at the positions where they are screwed by the knob bolt 382. The fourth cover 379 is provided in a state where the position of the outer surface portion of the fourth cover 379 in the left-right direction is the same as the outer surface portions of the concave portions 377a, 378a of the second cover 377 and the third cover 378. The first cover 376 incorporates the 2 belt transmission mechanisms 356 and 358, and is therefore provided at a position further outward than the second cover 377. The portion screwed by the knob bolt 382 is recessed toward the inside of the machine body, so that the disadvantages that the planted grain straw is hooked on the knob bolt 382, the planted grain straw is torn, and the straw chips are attached to the knob bolt 382 and the like can be avoided.

A large opening 384 for maintenance, which is rectangular when viewed from the side, is formed in the side wall portion 324 at a portion where the fourth cover 379 is provided. Fourth cover 379 is freely swingably opened and closed between a closed state covering opening 384 and an open state swinging outward. That is, the fourth cover 379 is supported at the upper portion of the left side wall portion 324 so as to be swingable about the front-rear axis Y2. When fourth enclosure 379 is opened, receiving mesh 323 can be removed or installed through opening 384. The fourth cover 379 is freely held in an open state by a gas damper not shown.

As shown in fig. 55 and 56, the fourth cover 379 has an inner wall plate 379a, an outer wall plate 379b, a front wall plate 379c, a rear wall plate 379d, a bottom plate 379e, and the like, and is formed in a substantially rectangular box shape. The inner wall 379a abuts the receiving mesh 323 in the closed position of the fourth enclosure 379. The outer wall plate 379b is located at a position spaced apart from the left outer side of the inner wall plate 379 a. The front wall plate 379c spans the front end portion of the inner wall plate 379a and the front end portion of the outer wall plate 379 b. The rear wall plate 379d spans the rear end portion of the inner wall plate 379a and the rear end portion of the outer wall plate 379 b. A bottom plate 379e spans lower ends of the inner wall plate 379a, the outer wall plate 379b, the front wall plate 379c, and the rear wall plate 379 d.

On the inner side of the fourth cover 379, a pair of front and rear guide portions 386 are provided which enter below the receiving net 323 at the closed position of the fourth cover 379. The guide portions 386 have: an inclined guide surface 386A extending rightward and downward from a middle portion in the vertical direction of the inner wall plate 379a such that the amount of the inclined guide surface 386A that enters below the receiving net 323 increases toward the lower side; and a front longitudinal side 386B and a rear longitudinal side 386C that are substantially triangular when viewed from the front; and a bottom surface 386D, the guide portion 386 being formed in a substantially triangular box shape when viewed from the front.

The inclined guide surface 386A of the guide portion 386 can guide a large number of sorted objects filtered from the left end portion of the receiving net 323 having a large amount of leakage of the threshed objects to the center side in the left-right direction of the swing sorting apparatus 336. This can prevent a sorting failure of the swing sorting apparatus 336 caused by the sorting target objects dropped from the receiving wire 323 being collectively supplied to the left end side of the swing sorting apparatus 336.

The guide portion 386 is bolted to the inner wall plate 379a so as to be detachable from the inner wall plate 379a, and an opening K is formed in the inner wall plate 379a at a portion where the guide portion 386 is attached. With this configuration, when the guide portion 386 is detached from the inner wall plate 379a, the opening K opens the inside of the fourth cover 379, and therefore, a storage (for example, a tool for repair, a component, or the like) can be stored in the inside of the fourth cover 379 through the opening K. When the guide portion 386 is attached, the opening K is closed, and thus the storage is not exposed to the outside.

(grass discharging hood body)

A grass discharge cover 390 is provided behind the threshing device 304 to receive waste grass discharged from the threshing device 304 and discharge the waste grass from the lower side to the outside. As shown in fig. 44, 45, and 48, the grass discharge cover 390 has an outer side wall 390A, an inner side wall 390B, and a rear wall 390C, which are integrally connected to form a cover having a substantially U-shaped cross section in plan view, which is open to the upper and lower sides of the front portion of the threshing chamber 328. The outer side wall 390A is located on the left side of the body, which is the outer side in the body width direction, and has a substantially trapezoidal shape when viewed from the side. The inner side wall 390B is located on the right side of the body, which is the inner side in the body width direction, and has a substantially trapezoidal shape when viewed from the side. The rear wall 390C is located at the rear side of the body.

The grass discharge cover 390 is supported such that the front end of the outer side wall 390A and the front end of the inner side wall 390B are connected to a plurality of upper and lower portions of the left and right side wall portions 324 and 325 of the threshing device 304 by bolts, respectively.

As shown in fig. 48, the outer side wall 390A assumes a front-rear orientation along the front-rear direction of the body. The inner side wall 390B is inclined so as to be closer to the right side of the body, i.e., the center side in the left-right direction of the body, as it is closer to the rear side of the body. As shown in fig. 44 and 45, a fuel tank 391 is provided on the rear side of the machine body in a dead space at the middle portion in the left-right direction between the threshing device 304 and the grain tank 305. The inside sidewall 390B is located adjacent to the fuel tank 391.

As shown in fig. 45, the inside side wall 390B extends to a position lower than the upper surface of the fuel tank 391, and as shown in fig. 44 and 48, the rear end of the inside side wall 390B extends to a position close to the side surface of the fuel tank 391. Specifically, the inner side wall 390B extends in a direction inclined to the right rear side from a right side portion of the rear end portion of the threshing device 304 to a position further to the rear of the machine body than the rear end of the fuel tank 391. According to the above configuration, the waste grass discharged from the grass discharge cover 390 can be prevented from falling on the fuel tank 391.

As shown in fig. 47 and 48, the grass discharge cover 390 has a downflow guide 394 in an inclined posture, and the downflow guide 394 extends from the outer side wall 390A to the inner side wall 390B and is located downward toward the right side of the machine body. The downflow guide 394 is provided on the left side of the machine body with respect to the center of the grass discharge cover 390 in the machine body width direction. That is, as shown in fig. 47, the flow-down guide 394 is provided on the entire body in a state of being shifted to the left side of the center position of the grass discharge cover 390 in the machine width direction as viewed from the front-rear direction of the machine.

As shown in fig. 48 and 49, the flow-down guide 394 is provided so as to extend in the front-rear direction so as to substantially cover the internal space of the grass discharge cover 390 in the front-rear direction at an upper portion of the grass discharge cover 390 when viewed from the side of the machine body. The upper end position of the leading start end side portion of the downflow guide 394 is located at a high position offset from the rotation axis center between the rotation axis center Y1 of the threshing cylinder 322 and the lower end portion of the receiving net 323 in the vertical direction, and the lower end position of the leading end side portion of the downflow guide 394 is located between the lower end of the rear wall 395 of the threshing chamber 328 and the upper end of the swing sorting device 336 in the vertical direction.

As shown in fig. 46 and 48, the receiving net 323 is not present at a position corresponding to the downflow guide 394, and faces the rear end of the threshing cylinder 322. As described below, the receiving net 323 is provided in a state of being located inside the threshing chamber 328 defined by the front wall (not shown) and the rear wall 395 in the front-rear direction. The threshing cylinder 322 extends forward of the front wall of the threshing chamber 328 and rearward of the rear wall 395 of the threshing chamber 328. The threshing cylinder 322 has a screw blade 397 for transporting crops on the front side and threshing teeth 334 similar to those in the threshing chamber 328 on the rear side of the rear wall 395. The rear wall 395 allows the threshing cylinder 322 to rotate and is formed with a generally U-shaped notch to allow crop to pass through.

The waste grass such as straw chips that has not leaked from the receiving net 323 passes through the rear wall 395 of the threshing chamber 328 and is discharged rearward. The waste grass is discharged from the rear end of the threshing device 304 to the outside. The waste grass that has not dropped from the swing sorting device 336 among the threshed objects dropped from the receiving net 323 is also discharged to the rear outside of the threshing device 304.

As shown in fig. 47, the downflow guide 394 has a steep inclined portion 398 having a large inclination angle with respect to the horizontal plane at a guide start end side portion located on the upper side, and a gentle inclined portion 399 having a small inclination angle with respect to the horizontal plane at a guide terminal end side portion located on the lower side. The gently inclined portion 399 is located between the lower end of the rear wall 395 of the threshing chamber 328 and the upper end of the swinging sorting device 336 in the up-down direction.

The gentle slope 399 has: an inclined portion 399a which is smaller than the inclination angle of the steeply inclined portion 398 and is inclined with respect to the horizontal plane; and a horizontal portion 399b in a horizontal posture, which is connected to the leading end portion side of the inclined portion 399a and has an inclination angle with respect to the horizontal plane of substantially zero. The horizontal portion 399b is mounted on the inclined portion 399a by means of bolt fastening. Therefore, when not necessary, the horizontal portion 399b can be removed, and the horizontal portion having a larger width can be replaced.

The upper end of the downflow guide 394 is fixed to the left side wall 324 of the threshing device 304 by bolting. The bolt connecting portion is located on the opposite side of the side where the waste grass contacts. The downflow guide 394 is bolted at a position halfway in the vertical direction to the rear wall 395 of the threshing chamber 328 via a bracket BR 1. The lower end of the downflow guide 394 is bolted to the rear wall 390C of the grass discharge cover 390 via a bracket BR2 (see fig. 49).

As described above, since the receiving net 323 is not present at the position corresponding to the downflow guide 394 and faces the rear end of the threshing cylinder 322, the waste grass is thrown into the grass discharge cover 390 by the threshing teeth 334 and discharged as the threshing cylinder 322 rotates. At this time, the discharged waste grass is guided to a position close to the right side of the machine body by the downflow guide 394 and discharged to the outside from below. Since the sorting wind from the windmill 339 is supplied between the lower end of the rear wall 395 of the threshing chamber 328 and the upper end of the swing sorting device 336, the waste grass is further guided to the right side by the sorting wind, in addition to the throwing guide function according to the rotation of the threshing cylinder 322.

(other embodiment mode of the third embodiment mode)

(1) In the above embodiment, the outer side wall 390A of the grass discharge cover 390 is set in the front-rear orientation along the front-rear direction of the machine body, but the outer side wall 390A may be set in an inclined orientation in which the closer to the rear side of the machine body, the closer to the center side in the left-right direction of the machine body.

(2) In the above embodiment, the fuel tank 391 is provided between the thresher 304 and the grain tank 305, but the fuel tank 391 may be provided in another place.

(3) In the above embodiment, the grass discharge cover body 390 has the downflow guide body 394, the downflow guide body 394 has the steep inclined portion 398 and the gentle inclined portion 399, and the gentle inclined portion 399 has the horizontal portion 399b in the horizontal posture. However, instead of this configuration, the horizontal portion 399b may not be provided, and the tilt angle may be set to a fixed value over the entire range. The position of the downflow guide 394 may be appropriately changed.

(4) In the above-described embodiment, an example of application to a threshing device mounted on a combine for rice, wheat, or the like has been described, but the present invention may also be applied to a threshing device mounted on a combine for other types of crops such as corn.

(availability in industry)

The invention can be used for a crawler travel device, a combine harvester and a harvester.

Claims (29)

1. A crawler travel device which is provided in a pair of left and right sides and supports a travel machine body so as to be self-propelled,

comprising: a drive wheel;

a tension wheel;

a ground-contacting pulley disposed between the drive wheel and the tension wheel;

a track frame supporting the tension pulley and the ground-contacting roller;

a crawler belt wound around the drive wheel, the tension pulley, and the ground-contacting pulley; and

a tension frame supported by the track frame so as to be capable of changing a position in a forward/backward traveling direction, the tension frame rotatably supporting the tension wheel,

the tension pulley comprises: a hub portion rotatably supported by a support shaft supported by the tension frame; a roller portion mounted on an outer peripheral portion of the hub portion and acting on the crawler belt; and a coupling portion for coupling the hub portion and the roller portion to each other so as to be able to release the coupling,

a flange portion is formed on the outer peripheral portion of the hub portion,

the coupling portion has: a bolt-fastening portion formed on the roller portion so as to be externally fitted to the boss portion and to extend along the flange portion; and a connecting bolt for fastening the bolt fastening portion, which is abutted against the flange portion from the outside of the traveling machine body, from the outside of the machine body,

a hub-shaped base portion provided on an inner peripheral portion of the roller portion, the base portion extending outward of the machine body along a shape of an outer peripheral portion of the hub portion,

the length of the outer peripheral part of the hub part from the flange part to the outer side end of the machine body is formed to be longer than the length of the base part in the same direction,

the base portion overlaps with a head portion of the connecting bolt located on an opposite side of the flange portion in an axial direction of the support shaft.

2. Crawler belt travel device according to claim 1,

the roller portion is configured in such a manner that a plurality of divided roller bodies are arranged in the circumferential direction,

the plurality of divided roller bodies are coupled to the hub portion via the coupling portions, respectively.

3. Crawler travel device according to claim 1 or 2,

a two-fork shaped support portion that supports both end portions of the support shaft with the tension pulley interposed therebetween from both sides in a rotation axis center direction of the tension pulley is provided at a distal end portion of the tension frame,

the support portion has a pair of left and right cut portions that cut in the opposite side of the direction in which the tension pulley applies tension, and into which both end portions of the support shaft are inserted and supported.

4. Crawler travel device according to claim 3,

the support portion has a ceiling portion that covers, from above, a space between the tension pulley and an upper portion of the base end portion of the support portion having the two-fork shape.

5. Crawler travel device according to claim 3,

a mud guard cover having an outer diameter larger than the outer diameter of the hub portion and a rib-like cover portion projecting toward the tension pulley side and facing the outer periphery of the hub portion is provided on a surface of the support portion facing the tension pulley.

6. Crawler travel device according to claim 1 or 2,

a pair of bearings for supporting the support shaft are provided on the inner peripheral side of the hub portion so as to be adjacent to each other in the axial direction of the support shaft,

a boundary between the flange portion and the bolt-fastened portion is set within a width range of a bearing located inside the machine body, out of the pair of bearings, in an axial direction of the support shaft, and the base portion of the roller portion connected to the flange portion is located across both of the pair of bearings in the axial direction of the support shaft.

7. Crawler travel device according to claim 1 or 2,

the thickness of the flange portion is set to be thicker than the thickness of the roller portion at a connecting portion between the flange portion and the roller portion.

8. Crawler travel device according to claim 1 or 2,

the flange portion and the roller portion have a concave-convex structure portion at a connecting portion therebetween.

9. A combine harvester having:

a machine body frame;

the crawler travel unit of claim 1, supporting the body frame; and

an attitude control device that controls an attitude of the body frame with respect to the crawler travel device, the combine harvester being characterized in that,

the attitude control device includes: an arm member on the side of the machine body frame; a sleeve member on a track frame side of the track traveling device; and a coupling shaft inserted through the sleeve member and coupling the arm member and the sleeve member to be relatively rotatable,

the end portions of the arm member and the sleeve member are coupled to each other by a concave-convex structure portion.

10. A combine harvester according to claim 9,

a sleeve portion is formed at a coupling portion of the arm member to be coupled to an end portion of the sleeve member, the sleeve portion projecting toward the sleeve member,

the sleeve portion covers an outer periphery of an end portion of the sleeve member.

11. A combine harvester according to claim 10,

a sealing member is disposed between the sleeve portion and the sleeve member.

12. A combine harvester according to claim 11,

a reduced diameter portion is formed at an end portion of the sleeve member,

the sealing member is disposed between the sleeve portion and the reduced diameter portion.

13. A combine harvester according to any one of claims 9-12,

the sleeve member extends from the track frame toward the inside of the body,

the arm member is coupled to an end portion of the sleeve member on the inner side of the machine body in a state of being displaced toward the inner side of the machine body with respect to the crawler frame,

the combine harvester is provided with a receiving part which extends from the track frame to the lower part of the arm component in a cantilever shape and can block and support the arm component.

14. A harvester is characterized in that a harvester is provided,

comprising: the crawler travel unit of claim 1; a harvesting processing part which transversely transfers the crops to the middle part of the width direction of the machine body and converges the crops after harvesting the crops; and a feeder for conveying the crop transversely transferred by the harvesting unit to the rear of the machine body,

the harvesting processing part is provided with a divider at the front part of the machine body of each of a pair of side wall parts positioned at the two side end parts in the width direction of the machine body, the divider performs dividing processing on crops as harvesting objects and crops not harvesting objects,

the divider has: a divider body located at the upper side; and a bottom cutting body detachably mounted on the lower side of the divider body.

15. A harvester according to claim 14,

the harvesting processing part is provided with a harvesting knife which cuts off the stem of the plant standing crop and harvests the crop,

the divider body is positioned at the position where the lower edge part of the divider body is higher than the harvesting knife,

the bottom divided body is positioned on the front side of the machine body with respect to the harvesting knife, and the lower edge of the bottom divided body is positioned lower than the harvesting knife.

16. A harvester according to claim 14 or 15,

and a tilt guide body having a tilted posture at a portion of the front lower portion of the side wall portion and inward in the machine body width direction, the tilt guide body being closer to the machine body rear side than to the machine body width direction inward in a plan view.

17. A harvester according to claim 16,

the inclined guide body is in a rear downward inclined posture that the closer to the rear side of the machine body, the closer to the lower side when viewed from the side.

18. A harvester according to claim 14 or 15,

an inclined portion having an inclined posture is formed at a front lower portion of the side wall portion, the inclined portion being closer to a rear side of the machine body than to a lower side,

the bottom surface of the side wall portion and the bottom surface of the bottom divided body are continuous with each other in a state where the bottom divided body is mounted to the crop divider body.

19. A harvester according to claim 14 or 15,

the front end edge of the bottom divided body is located at a position closer to the rear side of the machine body than the front end edge of the divider body, and a stepped notch portion is formed on the lower side of the front portion of the divider body when viewed from the side.

20. A combine harvester is characterized in that,

comprising: a traveling body having the crawler traveling device according to claim 1; and a threshing device for threshing the harvested crops,

the threshing device is arranged on the running machine body in a state of being deviated to either the left or the right relative to the central position of the machine body in the width direction,

a grass discharge hood body is arranged at the rear part of the threshing device, receives waste grass discharged from the threshing device and discharges the waste grass to the outside from the lower side,

the inner side wall of the grass discharge cover body positioned on the inner side of the machine body in the width direction is inclined in a posture that the closer the inner side wall is to the rear side of the machine body, the closer the inner side wall is to the center side of the machine body in the left-right direction.

21. A combine harvester according to claim 20,

the outer side wall of the grass discharge cover body positioned on the outer side in the width direction of the machine body is in a front-back orientation posture along the front-back direction of the machine body.

22. A combine harvester according to claim 20 or 21,

a grain tank for storing grains obtained by the threshing device is arranged in a state of being arranged in a width direction of the threshing device,

a fuel tank is arranged between the threshing device and the grain tank and adjacent to the inner side wall of the grass discharging cover body,

the inside side wall extends to a position lower than the upper surface of the fuel tank.

23. A combine harvester according to claim 22,

the rear end of the inside side wall extends to a position close to the side surface of the fuel tank.

24. A combine harvester according to claim 20 or 21,

the flow-down guide body extends from an outer side wall located on an outer side in the machine body width direction to the inner side wall, and is located closer to a lower side in the machine body width direction than the inner side.

25. A combine harvester according to claim 24,

the flow-down guide is provided at a position closer to the outside of the body than the center position in the width direction of the body of the grass discharge cover.

26. A combine harvester according to claim 24,

the downflow guide body has a steep inclined portion with a large inclination angle with respect to a horizontal plane at a guide start end side portion located on an upper side, and a gentle inclined portion with a small inclination angle with respect to a horizontal plane at a guide terminal end side portion located on a lower side.

27. A combine harvester according to claim 26,

the gentle slope portion of the downflow guide body has a horizontal portion having a horizontal posture.

28. A combine harvester according to claim 24,

the threshing device is provided with a threshing cylinder rotating around a front and back axis and a bearing net arranged in an arc shape along the outer periphery of the threshing cylinder in the threshing chamber, and a swing sorting device for sorting threshed treatment objects is arranged below the threshing chamber,

the upper end position of the guiding start end side part of the downflow guiding body is positioned between the rotating axle center of the threshing cylinder and the lower end part of the receiving net in the vertical direction and is close to the rotating axle center,

the lower end position of the guide terminal side part of the downflow guide body is located between the lower end of the rear wall of the threshing chamber and the upper end of the swing sorting device in the vertical direction.

29. A combine harvester according to claim 26,

the threshing device is provided with a threshing cylinder rotating around a front and back axis and a bearing net arranged in an arc shape along the outer periphery of the threshing cylinder in the threshing chamber, and a swing sorting device for sorting threshed treatment objects is arranged below the threshing chamber,

the gentle slope portion is located between the lower end of the rear wall of the threshing chamber and the upper end of the swing sorting device in the up-down direction.

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