JP5608131B2 - Combine - Google Patents

Description

  The present invention relates to a combine in which a pair of left and right crawler travel devices is disposed on the lower side of a vehicle body frame, and a transmission case is provided on the front end side of the vehicle body frame.

As described above, a combine described in [1] is known as a combine in which a pair of left and right crawler travel devices is disposed on the lower side of the vehicle body frame and a transmission case is provided on the front end side of the vehicle body frame.
[1] It extends in the left-right direction so as to connect the left and right outer front-rear main frames extending in the front-rear direction along the right and left outer lateral edges, and the left and right outer front-rear main frames. A horizontal main frame and a vertical frame located between the front and rear main frames on the left and right outer sides and provided between the front main frame and the rear main frame. The transmission case is a combine that is attached to the lateral main frame at the front end position via a mounting bracket (see Patent Document 1).

JP 2003-102236 A (paragraphs [0009], [0017], FIGS. 5 and 7)

This type of combine increases the position of the body frame with respect to the crawler traveling device to increase the vehicle height, or increases the stability of the front-rear balance on the vehicle with a high vehicle height, in order to improve the working performance in deep wet fields. Therefore, there is a case where it is desired to improve the front-rear balance of the airframe by disposing the engine on the rear side away from the transmission case installed on the front end side of the crawler traveling device.
In order to install the engine rearward from the position of the mission case supported on the horizontal main frame at the front end position of the body frame, it is necessary to shift the engine considerably rearward from the main frame at the front end position of the body frame. is there. However, when the engine is shifted from the lateral main frame at the front end position to the rear side, other devices are also moved to the rear side in association with this, which is not preferable because the body frame tends to be enlarged as a whole.

In the structure described in the above-mentioned Patent Document 1, a long bracket for connecting the transmission case is extended from the lateral main frame at the front end position toward the front side, and the connection is connected to the upper part of the transmission case. The stay is supported by a front frame body including a reinforcing frame that spans the horizontal main frame and the operating unit step at the front end position, and a truss frame that suspends the reinforcing frame from above.
That is, in this conventional structure, in order to arrange the mission case at a position farther forward than the lateral main frame at the front end position, the mission case is extended from the lateral main frame as described above toward the front. In addition to the long connecting bracket, a large reinforcing structure for stably supporting the transmission case with sufficient strength is required, which tends to increase the complexity and size of the structure.

  The purpose of the present invention is to stabilize the front-rear balance by devising the structure of the vehicle body frame, having sufficient strength with a simple structure, and increasing the distance between the installation positions of the transmission case and the engine. The purpose is to provide a combined combine.

[Solution 1]
The technical means of the present invention devised to solve the above problems is a combine in which a pair of left and right crawler travel devices are disposed on the lower side of the body frame, and a transmission case is disposed on the front end side of the body frame. There,
The vehicle body frame has a front-rear main frame extending in the front-rear direction along the lateral outer edges on the left and right outer sides, and a lateral direction extended in the left-right direction so as to connect the front-rear main frames on the left and right outer sides. A main frame and a pair of left and right suspension support frames along the front-rear direction at a position closer to the center in the left-right direction than the front-rear main frame on the left and right outer sides;
The left and right underbody support frames are connected to arch-shaped connecting members that connect the track frames of a pair of left and right crawler travel devices to support the track frames,
The suspension support frame is provided to protrude forward from the lateral main frame at the front end position of the body frame,
A mission support frame is provided over a portion of the left and right underbody support frame that protrudes forward from the lateral main frame at the front end position, and the mission case is supported by the mission support frame. To do.

[Operation and effect of invention according to Solution 1]
According to the configuration of the present invention relating to the above solution 1, the left and right foot support frames are used, which are strength members to which the arch-shaped connecting members that connect the left and right track frames are connected. The turning support frame is projected forward from the lateral main frame at the front end position, and the mission case is supported by the mission support frame provided over the portion projecting forward from the lateral main frame.
In this way, by using the suspension support frame as a strength member to which the arch-shaped connecting members that connect the left and right track frames are connected, the amount of protrusion to the front side of the main frame at the front end position can be reduced. Even if it is enlarged, sufficient strength can be secured with a simple structure.
In addition, by connecting the projecting parts of the left and right underbody support frames with the mission support frame, the mission case can also play a role of reinforcing the strength in the left and right direction of the projecting parts of the left and right underbody support frames. The strength of the entire support structure can be improved.

[Solution 2]
According to another technical means of the present invention taken in order to solve the above-mentioned problem, the arch-shaped connecting member is connected to the left and right underbody support frames on the front side of the laterally main frame at the front end position. It is characterized by that.

[Operation and effect of invention according to Solution 2]
According to the configuration of the invention relating to the above solution 2, the arch-shaped connecting member is more than the horizontal main frame at the front end position with respect to the left and right underbody support frames protruding forward from the horizontal main frame at the front end position. Are also connected on the front side, and the portions of the left and right underbody support frames that protrude to the front side from the lateral main frame are supported by the arch-shaped connection members on the lower side.
As a result, the left and right underbody support frames can be supported at a position closer to the transmission case on the front side than the laterally main frame at the front end position, and the strength of the structural portion that supports the transmission case can be improved.

[Solution 3]
Another technical means of the present invention taken to solve the above problem is that the upper surface of the mission support frame that supports the mission case is at the same height as or lower than the upper surfaces of the left and right underbody support frames. The left and right underbody support frames are connected to each other.

[Operation and effect of invention according to Solution 3]
According to the configuration of the invention according to the above solution 3, the object to support the mission case is a mission support frame having an upper surface having a height equal to or lower than the upper surface of the underbody support frame. It is easy to set the height of the vehicle body frame to a relatively high position with respect to the transmission case in which the height to the ground is limited by the positional relationship with the crawler travel device.
In other words, the mission support frame for supporting the mission case is the same as the upper surface of the mission support frame, even if the height relationship with the mission case is set at a predetermined position. Since it may be set to a height higher than that, there is an advantage that it is easy to obtain a combine with good wetland performance by setting the height of the body frame to the ground relatively high.

[Solution 4]
Another technical means of the present invention taken to solve the above-mentioned problem is that a driving unit step is provided at one end side in the left-right direction of the vehicle body frame at a position ahead of the lateral main frame at the front end position. A suspension support frame of one of the pair of suspension support frames is provided to support the operation unit step, and the suspension support frame on the side supporting the operation unit step is provided on the other side It extends to the front side longer than a support frame, It is characterized by the above-mentioned.

[Operations and effects of invention according to Solution 4]
According to the configuration of the invention relating to the solution means 4 described above, the suspension support frame on the side that supports the driving unit step is extended to the front side longer than the suspension support frame on the other side. There is an advantage that the driving unit step can be favorably supported by the suspension support frame on the side extended to the side.

[Solution 5]
Another technical means of the present invention taken to solve the above-mentioned problems is that the horizontal main frame on one end side of the vehicle body frame in which the operation unit step is provided in the left-right direction and on the rear side of the mission support frame. An engine is mounted thereon, and a belt transmission mechanism for power transmission is provided between an output shaft of the engine and an input shaft of a mission case attached to the mission support frame.

[Operation and effect of invention according to Solution 5]
According to the configuration of the invention relating to the above solution 5, the engine is mounted on the side main frame on the rear side of the mission support frame on the side where the operation unit step is provided, and the output shaft of the engine and the front side of the engine are mounted on the front side. Since a belt transmission mechanism for power transmission is provided between the input shaft of the transmission case, power can be transmitted to the transmission case side with the engine positioned on the rear side away from the transmission case. it can.

[Solution 6]
Another technical means of the present invention taken to solve the above-mentioned problems is that the belt transmission mechanism includes a first transmission belt stretched on an output pulley provided on an output shaft of the engine, and an input of the transmission case. A relay shaft for supporting the relay pulley, comprising: a second transmission belt stretched on an input pulley provided on the shaft; and a relay pulley on which each of the first transmission belt and the second transmission belt is stretched. A support to be supported is erected on the mission support frame.

[Operations and Effects of Invention According to Solution 6]
According to the configuration of the invention relating to the solution means 6 described above, the mission support frame for supporting the transmission case can also be used as a support attachment means for supporting the relay shaft that supports the relay pulley. It is possible to simplify the structure by sharing.

It is a whole side view of an ordinary combine. It is a whole top view of a normal combine. It is a diagram which shows a power transmission system. Partially cutaway side view showing the structure of power transmission to the power input section of the feeder It is a top view which shows a vehicle body frame. It is a side view which shows a vehicle body frame. It is a front view which shows a vehicle body frame. It is a top view which shows the belt transmission mechanism between an engine and a transmission case. It is a side view which shows the belt transmission mechanism between an engine and a transmission case. FIG. 10 is a view taken along line X-X in FIG. 9. The operation linkage mechanism in a driving | running part is shown, (a) is a top view, (b) is a side view. It is a front view which shows the operation linkage structure in a driving | running part. The attachment part of a threshing lever is shown, (a) is a side view, (b) is a sectional view taken along line XIIIb-XIIIb in FIG. 11 (b), and (c) is a sectional view taken along line XIIIc-XIIIc in FIG. . FIG. 2A is a side view showing the driving portion, and FIG. 2B is a side view showing the inside of the engine bonnet with the intake box removed. It is the XV-XV sectional view taken on the line in Fig.14 (a). It is a top view which shows the lateral outer side location of the operation part step support frame part. It is a side view which shows the crawler traveling apparatus in another embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Overall structure of the combine]
FIG. 1 is an overall side view of an ordinary combine according to the present invention, and FIG. 2 is an overall plan view. As shown in these drawings, the ordinary combine according to the present invention includes a pair of left and right crawler travel devices 2, 2 on the lower side of the body frame 1 to form a self-propelled vehicle body, and the front of the body frame 1. The driving unit 6 equipped with the engine 60 and the driving unit 3 including the driving seat 30 on the upper side of the driving unit 6 are provided.
A threshing device 5 and a grain bag packing unit 16 are arranged in the lateral direction of the machine body on the rear side of the operation unit 3, and a cutting unit 4 having a feeder 4 </ b> A connected to the front portion of the threshing device 5 is provided. ing.

As shown in FIGS. 2 to 4, the cutting unit 4 includes the feeder 4 </ b> A in which a feeder conveyor 41 is housed inside a transfer case 40, and a preprocessing frame 42 connected to a front end portion of the feeder 4 </ b> A. The pre-processing device 4B is supported by.
Due to the up-and-down swing operation of the feeder 4A on the threshing device 5, the platform 42a located at the lower part of the pretreatment frame 42 is lowered to the ground, and the platform 42a is lifted from the ground. It is configured to be capable of moving up and down.

The pretreatment device 4B scrapes the pair of left and right dividers 43, 43 that are located at the front portion of the pretreatment frame 42 and that weed the planted culm to be cut, and the tip of the planted culm to be cut. The rotary reel 45 to be cut, the clipper-type harvesting device 44 that harvests the planted culm to be harvested, and the harvested culm is brought to the front side of the feeder 4A and conveyed to the entrance 40a of the conveying case 40 of the feeder 4A. And an auger 46 to be configured.
The feeder 4A includes a feeder conveyor 41 (see FIG. 3) inside, conveys the harvested cereals fed from the auger 46 side to the rear end portion of the feeder 4A, and the discharge port 40b located at the rear end portion. To the handling room 50 of the threshing device 5 is configured to supply the whole of the harvested cereal seeds to the tip.

The threshing device 5 includes a handling cylinder 52 and a sorting device (not shown) disposed inside a handling chamber 50 via a handling cylinder shaft 51 having a longitudinal axis x1 of the machine body. The handling cylinder 52 is rotationally driven by the driving force of the threshing drive system transmitted to the trunk shaft 51, the threshing processed material is sorted into threshing grains and waste straws, and the threshing grains are stored in the bag of the grain bag packing unit 16. It is configured to be supplied to the filling tank 16a.
Of the left and right lateral side walls 50a, 50b of the handling chamber 50, the left lateral side wall 50a is configured to be widely open laterally outward about the vertical axis y1 on the rear side of the machine body. The inside of the handling chamber 50 can be maintained and inspected with the lateral side wall 50a open.
By opening the side wall 50a portion of the handling chamber 50 in this way, the ceiling wall plate (not shown) on the upper side of the handling chamber 50 can be opened and closed, for example, around the horizontal axis in the horizontal direction. Compared with the case where the air damper (not shown) is arranged as an auxiliary lifting means for assisting the lifting force for swinging and opening the heavy ceiling wall plate, the structure is complicated and the weight is increased. There is no risk of inviting.

  The grain bag filling unit 16 is configured so that the grains supplied into the bag filling tank 16a can be discharged from a grain discharge port (not shown) provided at the lower part of the bag filling tank 16a to be bagged. It is.

In the driving unit 6 provided at the front portion of the vehicle body frame 1, the output shaft 61 is in a horizontally placed posture along the left-right direction of the body with respect to the vehicle body frame 1 corresponding to the lower side of the driver seat 30 of the driver unit 3. An engine 60 is mounted.
The output shaft 61 of the engine 60 has a travel drive system transmission mechanism 62 (described later) for driving the left and right crawler travel devices 2 and 2 and a threshing drive system (described later) for transmitting driving force to the threshing device 5. The transmission mechanism 55 is linked.

[Operation section]
The driving unit 3 is provided with a control tower 31 provided with a control operation tool facing the front side of the airframe of the driver seat 30, and provided with operation tools for various work devices on the left lateral side of the drive seat 30. A side panel box 32 is erected.
The driver seat 30 is disposed on the upper side of a box-shaped seat support 3B provided on the rear side of the driver step 3A. The seat support 3B is provided with a space for accommodating the engine 60 and the like of the prime mover 6 on the lower side, and the seat support 3B also serves as an engine bonnet that covers the engine 60 of the prime mover 6 from the upper side. Has been. The seat support base 3B has an open posture in which the seat frame is tilted laterally outward around the axial center x2 (see FIGS. 15 and 16) of the right-hand edge portion of the body frame 1 and on the driving unit step 3A. The posture is switchable to a fixed boarding posture, and this structure will be described later.

In the driving section 3, a steering operation lever 31a is provided on the control tower 31, and a main transmission lever 33 for performing a shifting operation including forward / reverse switching of the airframe is provided on the front side of the side panel box 32, and a sub-transmission lever 31a. A transmission lever 34 is provided.
Further, on the rear side of the side panel box 32, as shown in FIGS. 2 to 4, a forward-triggered cutting clutch lever 36 that performs an on / off operation of the forward-rotating reaping clutch 102 for driving the reaping section 4 to rotate forward is provided. The threshing clutch 101 is disposed on the side closer to the driver's seat 30 and is located farther from the driver's seat 30 in the left-right direction of the machine than the forward-triggered cutting clutch lever 36 to intermittently drive the threshing device 5. A threshing clutch lever 35 is provided for turning on and off.

The forward chopping clutch lever 36 and the threshing clutch lever 35 are configured so that the threshing clutch lever 35 is engaged independently from the state in which the forward reaping clutch lever 36 and the threshing clutch lever 35 are both in the clutch disengagement position (the rear side of the machine). Although it can be operated to the position (front side of the machine body), when the forward cutting mowing clutch lever 36 is operated to the entering position (front side of the machine body), the threshing clutch lever 35 in the cutting position is also entered together. The forward reaping clutch lever 36 and the threshing clutch lever 35 are linked so that the threshing device 5 is driven along with the driving of the reaping portion 4.
On the contrary, in the state where both the forward rotation cutting clutch lever 36 and the threshing clutch lever 35 are in the clutch engagement position, the forward rotation cutting clutch lever 36 can be operated to the cutting position alone, but the threshing clutch lever 35 is disconnected. When operated to the position, the forward-rotation cutting clutch lever 36 is also operated to the cutting position together so that the driving of the cutting unit 4 together with the threshing device 5 is stopped.

That is, although the threshing device 5 can be driven alone, the forward rotation drive of the reaping part 4 cannot be performed independently, and is linked so as to be accompanied by the synchronous drive of the threshing device 5.
Although a specific configuration for this linkage is not shown, for example, a locking member that contacts the cutting operation direction side of the threshing clutch lever 35 from the forward rotation cutting clutch lever 36 side, or the threshing clutch lever Appropriate means may be employed, such as a configuration in which a locking member that contacts from the 35 side to the entering operation direction side of the forward rotation cutting clutch lever 36 is connected.

In addition, the forward reaping clutch lever 36 and the threshing clutch lever 35 disposed in the side panel box 32 are located further on the front side of the threshing device 5 that is further away from the driver seat 30 in the left-right direction of the machine body. Further, a reverse rotation cutting clutch lever 37 is provided for performing on / off operation of the reverse rotation cutting clutch 103 for driving the cutting portion 4 in the reverse rotation and stopping the driving.
The reversing cutting clutch lever 37 is pivotally supported so that it swings around the horizontal axis in the left-right direction of the machine and can be operated almost vertically. The grip 37a is disposed in the longitudinal direction of the machine. Then, the forward operation cutting clutch lever 36 and the threshing clutch lever 35 are in the same position as the gripping portions 36a and 35a of the forward cutting mowing clutch lever 36 and the threshing clutch lever 35. At the cutting operation position of the diversion harvesting clutch lever 36 and the threshing clutch lever 35, the grip portion 37a is located on the front side of the machine body relative to the gripping portions 36a and 35a of the normal rotation mowing clutch lever 36 and threshing clutch lever 35. Therefore, the forward cutting mowing clutch lever 36 and the threshing clutch lever 35 at the cutting position are arranged without being obstructed to perform the cutting operation.

  The reverse cutting clutch 103 and the forward cutting clutch 102 are linked to each other by a check linkage mechanism (not shown) so that when one is in the engaged state, the other is in the disconnected state.

[Power transmission structure]
On the front end side of the vehicle body frame 1 closer to the front side of the body than the place where the engine 60 is provided, a transmission case 7 having a transmission mechanism for a drive system for driving the left and right crawler traveling devices 2 and 2 is disposed. It is set up.
A travel drive system belt transmission mechanism 62 that transmits the driving force from the engine 60 to the input shaft 70 of the mission case 7 is provided between the output shaft 61 of the engine 60 and the input shaft 70 of the mission case 7. It is.
In other words, the belt drive mechanism 62 of the travel drive system is provided between the travel system output pulley 61 a provided on the output shaft 61 of the engine 60 and the input pulley 70 a provided on the input shaft 70 of the transmission case 7. The first transmission belt 62a and the second transmission belt 62b are stretched and interlocked via relay pulleys 63a and 63b provided on the relay shaft 63 pivotally supported by the fixed portion.

  The transmission case 7 includes a hydrostatic continuously variable transmission mechanism having a variable displacement axial plunger type hydraulic pump and an axial plunger type hydraulic motor driven by pressure oil from the hydraulic pump. 71 and a gear-type transmission mechanism 72 that transmits a driving force to the drive shafts 73 of the left and right crawler traveling devices 2 and 2 are incorporated. Then, the engine power input from the input shaft 70 is continuously shifted by a hydrostatic continuously variable transmission mechanism 71, and the shifted power is shifted in multiple stages by a gear transmission mechanism 72. The drive shafts 73 and 73 of the crawler traveling devices 2 and 2 are configured to be driven and stopped separately for the left and right.

[Reverse drive system]
In the transmission case 7, in addition to the gear-type transmission mechanism 72 that transmits power to the traveling drive system, reverse power is supplied to the cutting unit 4 for outputting reverse power to the cutting unit 4. A cutting reverse rotation output unit 74 is provided for output.
As shown in FIG. 3, the cutting reverse rotation output unit 74 is constituted by a speed reduction mechanism using a planetary gear mechanism. The chopping reverse rotation output unit 74 is input with power split from the engine power input from the input shaft 70 from the transmission gear 70b on the transmission upper side that is not affected by the shift by the hydrostatic continuously variable transmission mechanism 71. The power greatly reduced by the planetary gear mechanism is output from the reverse output shaft 75.

  The reverse output shaft 75 is provided so as to protrude on the lateral side opposite to the lateral side on which the input shaft 70 of the mission case 7 projects. The power output from the reverse output shaft 75 is the rotational direction of the power transmitted through the transmission mechanism 55 of the threshing drive system among the power input to the feeder input shaft 47 of the feeder 4A of the cutting unit 4. Is configured to transmit a driving force via a transmission mechanism 64 for reverse transmission so as to be transmitted to the feeder input shaft 47 in a state of rotating in the reverse direction.

The reverse transmission mechanism 64 is pivotally supported by a fixed portion of the vehicle body frame 1 between an output pulley 75 a provided on the reverse output shaft 75 and a reverse input pulley 47 a provided on the feeder input shaft 47. The first reverse transmission belt 64a and the second reverse transmission belt 64b are stretched through intermediate pulleys 65a and 65b provided on the intermediate shaft 65.
Then, by the transmission mechanism 64 for reverse transmission and the cutting reverse output part 74 provided in the transmission case 7, the cutting that transmits the driving force for reverse rotation to the feeder input shaft 47 of the feeder 4 </ b> A of the cutting part 4. A reverse transmission mechanism A is configured.

The transmission mechanism 64 for reverse transmission includes a second reverse transmission belt 64 b stretched between one intermediate pulley 65 b provided on the intermediate shaft 65 and a reverse input pulley 47 a provided on the feeder input shaft 47. There is provided a reverse-rotation mowing clutch 103 acting on the motor.
As shown in FIGS. 3 and 4, the reverse rotation cutting clutch 103 includes a tension ring body 103 a that comes into contact with the second reverse transmission belt 64 b, and the reverse rotation cutting clutch lever 37 provided in the operating unit 3. By the turning-on / off operation, the reverse rotation cutting clutch lever 37 and the tension ring body 103a are linked by a linkage mechanism (not shown) so that the tension ring body 103a switches the second reverse rotation transmission belt 64b between a tension state and a relaxation state. is there.
As a result, when the reverse rotation harvesting clutch lever 37 is operated to be engaged, the tension wheel 103a tensions the second reverse transmission belt 64b so that the reverse rotation harvesting clutch 103 is engaged, and when the reverse rotation harvesting clutch lever 37 is operated to operate the tension. A belt tension clutch is configured in which the ring body 103a relaxes the second reverse transmission belt 64b, and the reverse harvesting clutch 103 enters the clutch disengaged state.

The cutting reverse rotation output part 74 built in the mission case 7 is disposed at a lower position of the fuselage with the upper part of the mission case 7 itself being located close to the upper surface of the body frame 1. As shown in FIG. 4, the cutting unit 4 is provided at a position lower than the feeder input shaft 47 that is a power input unit of the feeder 4 </ b> A of the feeder 4 </ b> A.
The reverse transmission mechanism 64 also has the reverse output shaft 75 and the intermediate shaft 65 positioned lower than the feeder input shaft 47, and most of the first reverse transmission belt 64a and the second reverse transmission belt 64b are provided. It is disposed below the feeder input shaft 47 which is a power input unit.
Therefore, considering the center of gravity of the cutting reverse rotation output unit 74 and the reverse rotation transmission mechanism 64, the position is considerably lower than the feeder input shaft 47.

[Forward rotation drive system]
The output shaft 61 of the engine 60 is integrally provided with a threshing output pulley 61b for transmitting a driving force to a threshing drive system such as the threshing device 5.
The threshing output pulley 61b, the threshing input pulley 53a provided in the tang shaft 53 provided near the bottom of the threshing device 5, and the threshing transmission stretched across the threshing output pulley 61b and the threshing input pulley 53a. The belt 54 constitutes a transmission mechanism 55 of a threshing drive system in which engine power is transmitted to the threshing drive system.
The engine power transmitted to the tang shaft 53 is fixed to the tang shaft 53, in addition to the threshing input pulley 53a, a barrel output pulley 53b, a sorting output pulley 53c, and a normal cutting output pulley 53d. As a result, a handling cylinder transmission mechanism 56 that transmits power to the handling cylinder shaft 51, a selection transmission mechanism 57 that transmits power to various sorting mechanisms in the threshing device 5, and a feeder input shaft 47 of the cutting unit 4. It is configured so as to be branched into each of the forward cutting power transmission mechanism 48 that transmits power.

As shown in FIG. 3, the handling cylinder transmission mechanism 56 that transmits power to the handling cylinder shaft 51 is provided on the Karatsu shaft 53 that protrudes outward from the right side wall 50 a on the right side of the threshing device 5. A handling cylinder output pulley 53b and a handling cylinder input pulley 51a for transmitting driving force to the handling cylinder 52 are provided.
The barrel transmission mechanism 56 includes an intermediate pulley 56a and a first barrel transmission belt 56b along the right lateral wall 50a of the threshing device 5, and an intermediate pulley 56c and a second barrel transmission along the front wall 50b of the threshing device 5. The threshing device 5 is disposed along the right side wall 50a and the front wall 50b.

  A sorting transmission mechanism 57 for transmitting power to various sorting mechanisms in the threshing device 5 is provided from a sorting output pulley 53c provided on the Karatsu shaft 53 at a location protruding left laterally outward from the left lateral wall 50a of the threshing device 5. The first screw conveyor 58A, the second screw conveyor 58B, and the drive shaft 58C of the swing sorting device are driven through the transmission belts 57a and 57b.

The forward cutting rotation transmission mechanism 48 is configured to extract power from the forward cutting output pulley 53d provided on the Karatsu shaft 53 at a further left outer position than the sorting output pulley 53c.
That is, on the feeder 4A side of the cutting unit 4, the forward input pulley 47b is provided on the left side opposite to the side where the reverse input pulley 47a of the feeder input shaft 47 is provided. The forward rotation driving pulley 53d is configured to transmit the forward driving force to the forward rotation input pulley 47b via the transmission belt 48a.

  As shown in FIGS. 3 and 4, the branching point from the threshing drive system of the forward chopping transmission mechanism 48 is the forward cutting output pulley 53 d provided on the tang shaft 53, and is therefore the power input portion of the feeder 4 </ b> A. The portion near the bottom of the threshing device 5 that is lower than the feeder input shaft 47, and this reaping forward rotation transmission mechanism 48 is also disposed at a relatively low center of gravity.

The cutting forward rotation transmission mechanism 48 is provided with a forward cutting clutch 102 that acts on a transmission belt 48a stretched between a cutting forward rotation output pulley 53d and a forward rotation input pulley 47b.
As shown in FIGS. 3 and 4, the forward rotation cutting clutch 102 includes a tension ring body 102 a that comes into contact with the transmission belt 48 a, and allows the forward rotation cutting clutch lever 36 provided in the operating unit 3 to be turned on and off. The forward rotation cutting clutch lever 36 and the tension ring body 102a are linked by a linkage mechanism (not shown) so that the tension ring body 102a switches the transmission belt 48a between a tension state and a relaxed state.
Thus, when the forward rotation cutting clutch lever 36 is operated, the tension ring body 102a tensions the transmission belt 48a and the forward rotation cutting clutch 102 enters the clutch state, and when the forward rotation cutting clutch lever 36 is operated, the tension ring body 102a. The belt tension clutch is configured in which the transmission belt 48a is relaxed and the forward rotation cutting clutch 102 is in the clutch disengaged state.

A threshing clutch 101 is provided which acts on a threshing transmission belt 54 stretched between a threshing output pulley 61 b provided on the output shaft 61 of the engine 60 and a threshing input pulley 53 a provided on the red pepper shaft 53.
As shown in FIG. 3, the threshing clutch 101 includes a tension ring body 101 a that comes into contact with the threshing transmission belt 54, and this tension wheel is operated by turning on and off the threshing clutch lever 35 provided in the operation unit 3. The threshing clutch lever 35 and the tension ring body 101a are linked by a threshing clutch operating mechanism 80 described later so that the body 101a switches the threshing transmission belt 54 between a tension state and a relaxed state.
As a result, when the threshing clutch lever 35 is turned on, the tension ring body 101a tensions the threshing transmission belt 54 and the threshing clutch 101 enters the clutched state. When the threshing clutch lever 35 is turned off, the tension wheel body 101a is transmitted. The belt 54 is loosened so that the threshing clutch 101 is in the clutch disengaged state.

Since it is configured in this way, when the mowing unit 4 and the threshing device 5 are driven together to perform the mowing and threshing work, if the forward rotation mowing clutch lever 36 is operated to the entering position (the front side of the machine body), The threshing clutch lever 35 is also operated to the entering position (front side of the machine body), and the reaping part 4 and the threshing device 5 are driven together to perform the reaping and threshing work.
At this time, if the reverse rotation harvesting clutch lever 37 is operated to the engaged position, the forward rotation harvesting clutch lever 36 cannot be operated to the engaged position, or the reverse rotation harvesting clutch lever 37 is forcibly disconnected. The forward rotation cutting clutch lever 36 and the reverse rotation cutting clutch lever 37 are linked via the check linkage mechanism described above so as to be operated to the position.

From the state where the reaping part 4 and the threshing device 5 are both driven to perform the reaping and threshing operation, if the forward rotation reaping clutch lever 36 is operated to the cut position, the driving of the reaping part 4 is stopped, and the threshing apparatus Driving 5 continues. If the threshing clutch lever 35 is operated to the cut position, the driving of the threshing device 5 and the cutting unit 4 are both stopped.
If the reverse harvesting clutch lever 37 is to be operated to the cut position from the state in which the above harvesting and threshing operation is being performed, as described above, the forward rotation cutting clutch lever 36 cannot be operated unless it is first operated to the clutch disengagement position. Alternatively, the forward rotation cutting clutch lever 36 is forcibly operated to the clutch disengagement position.

[Frame structure]
The vehicle body frame 1 supported by a pair of left and right crawler traveling devices 2 and 2 is configured as shown in FIGS.
That is, the vehicle body frame 1 is the same as a pair of left and right mainframes 10 extending in the front-rear direction along the lateral outer edges on the left and right outer sides, and the front and rear main frames 10, 10 on both left and right sides. The horizontal main frame 11 is positioned below the horizontal main frame 11 at a position closer to the center in the left-right direction than the main frame 10 on the left and right sides so as to be welded and connected on a plane. The suspension support frame 12 is welded and connected to the horizontal main frame 11 in a state, and is configured in a lattice shape in plan view.

The undercarriage support frame 12 is welded to the lateral main frame 11 so that the front and rear main frames 10 and 10 on both the left and right sides and the front and rear main frames 10 and 10 are connected in the front and rear direction. The vehicle body frame 1 is configured together with the horizontally oriented main frame 11 connected at a plurality of locations, and the track frames 20 and 20 in the pair of left and right crawler traveling devices 2 and 2 are supported.
That is, the front and rear both sides of the arch-shaped connecting member 21 at two intermediate positions in the left-right direction excluding the vicinity of the top of the arch-shaped connecting member 21 that connects the left and right track frames 20, 20 at both front and rear ends. And a channel-like column member 22a interposed between the upper surface side and the lower surface side of the undercarriage support frame 12, and the upper surface side of the arch-shaped connecting member 21, and the lateral outer surface of the undercarriage support frame 12 The left and right undercarriage support frames 12 and 12 and the arch-shaped connecting member 21 are welded and connected via a mounting member 22 formed in a rectangular tube shape with a flat bracket 22b interposed between them. It is.

The horizontal main frame 11 that connects the front and rear main frames 10 and 10 is a first horizontal main frame 11a, a second horizontal main frame 11b, and a third horizontal main frame 11c that are arranged in order from the front in the aircraft traveling direction. The fourth horizontal member 11d is composed of four frame members. The front end side of the underbody support frame 12 protrudes further forward than the first horizontal main frame 11a on the front end side of the horizontal main frame 11 connecting the front and rear main frames 10 on the left and right sides. The transmission support frame 13 is welded and connected near the front end thereof.
The mission support frame 13 is a member that connects the front end sides of the pair of left and right suspension support frames 12, and connects the mission case 7 via a channel-like mounting bracket 13b that is welded and fixed to the upper surface 13a side. It is a member for supporting. As shown in FIG. 7, the upper surface 13a is welded to the left and right underbody support frames 12 so that the height is slightly lower than the upper surface 12a of the left and right underbody support frames 12. It is connected.

The connecting portion of the arch-shaped connecting member 21 on the front end side with respect to the undercarriage support frame 12 is further forward than the first horizontal main frame 11a on the front end side of the horizontal main frame 11, and the mission support frame 13 It is a location on the rear side. Therefore, the arch-shaped connecting member 21 on the front end side supports the underbody support frame 12 near the mission support frame 13, thereby increasing the support strength of the mission case 7 supported by the mission support frame 13. It can improve.
A mounting portion 15 for the engine 60 is provided near the right end of the first sideways main frame 11a on the front end side of the sideways main frame 11 and near the right end of the second sideways main frame 11b located on the rear side. The engine 60 is mounted over the first horizontal main frame 11a and the second horizontal main frame 11b located on the rear side as shown in FIGS.

As shown in FIG. 5, of the left and right side front and rear main frames 10 and 10, the right front and rear main frame 10 extends beyond the front side first lateral main frame 11 a and the left front and rear main frame 10. It extends longer than the front side. Of the pair of left and right suspension support frames 12, 12, the right suspension support frame 12 is formed to be longer forward than the left suspension support frame 12.
An operation unit step support frame 14 that supports the operation unit step 3 </ b> A of the operation unit 3 is continuously provided across the right front-rear facing main frame 10 and the right underbody support frame 12. In the front-rear direction, the operation unit step support frame 14 extends from the vicinity of the rear end of the driving unit 6 further forward than the mission support frame 13 attached to the underbody support frame 12.

[Transmission drive system transmission structure]
As shown in FIGS. 8 and 9, the engine 60 and the transmission case 7 are attached to the vehicle body frame 1 configured as described above.
That is, the engine 60 is fixed to the mounting portion 15 of the engine 60 provided on the first lateral main frame 11a and the second lateral main frame 11b on the rear side near the right lateral side portion of the body frame 1. It is.
The transmission case 7 is supported at its lower side by an axle case 76 extending laterally from the transmission case 7 by a support stay 23 erected on the front end side of the track frame 20 toward the upper front. The upper side is fixed by being connected to the mission support frame 13.

The engine 60 and the transmission case 7 are arranged on the vehicle body frame 1 as follows. That is, the output shaft 61 of the engine 60 provided on the right side of the vehicle body frame 1 extends from the right side of the vehicle body frame 1 provided with the mounting portion 15 toward the left side of the vehicle body frame 1. On the other hand, the input shaft 70 of the mission case 7 disposed at the center of the vehicle is extended toward the right side of the vehicle body frame 1.
The output shaft 61 is provided with a traveling system output pulley 61a capable of tensioning one first transmission belt 62a, and a traveling system input capable of tensioning two second transmission belts 62b on the input shaft 70. A pulley 70a is provided.

Relay pulleys 63a and 63b provided between a travel system output pulley 61a provided on the output shaft 61 of the engine 60 and a travel system input pulley 70a provided on the input shaft 70 of the transmission case 7 are shown in FIGS. As shown in FIG. 10, it is supported by the relay shaft 63.
One end side of the relay shaft 63 is fixedly supported by a plate-like support body 17 detachably provided on a mounting piece 13 c provided on the upper side of the mission support frame 13 via a connecting bolt, and the other end side thereof. It is fixedly supported by welding to a mounting bracket 14b provided on the lateral wall 14a of the operation unit step support frame 14.

The relay shaft 63 is rotatably supported by the relay pulleys 63a and 63b, and the first transmission belt 62a between the relay pulley 63a and 63b and the traveling system output pulley 61a. The first relay pulley 63a to which the second transmission belt 62b is stretched between the first relay pulley 63a to which the second transmission belt 62b is stretched and the projecting direction side of the output shaft 61 of the engine 60 ( It is pivotally supported by being positioned closer to the left side of the body frame 1.
The relay shaft 63 includes a first transmission belt 62a stretched between the first relay pulley 63a and the traveling system output pulley 61a, the second relay pulley 63b, and the traveling system input pulley 70a. Support arms 66a, 66a of tension pulleys 66, 66 for the second transmission belt 62b stretched between them are pivotally supported separately on the left and right.

  The support arm 66a of the tension pulley 66 is distributed to the left and right sides of the relay pulleys 63a and 63b on the relay shaft 63. The tension pulley 66 for the first transmission belt 62a is the first transmission belt 62a. The tension pulley 66 is pivotally supported by the relay shaft 63 between the first relay pulley 63a to be stretched and the support body 17, and the second transmission belt 62b is stretched by the tension pulley 66 for the second transmission belt 62b. 2 It is pivotally supported by the relay shaft 63 between the relay pulley 63b and the lateral wall 14a of the operation unit step support frame 14.

The tension pulleys 66 and 66 pivotally supported by the respective support arms 66a and 66a are provided so as to come into contact with the first transmission belt 62a and the second transmission belt 62b from above, respectively. The urging tools 67, 67 are connected to the intermediate positions of the support arms 66a, 66a in the longitudinal direction via the connection pins 66b, and the support arms 66a, 66a are connected to the tension of the first transmission belt 62a and the second transmission belt 62b. It is configured to be biased to the side.
That is, each urging tool 67 is provided with a urging rod 67 b provided with a hook portion 67 a that can be engaged and disengaged with respect to the two engagement pieces 13 d provided on the transmission support frame 13 of the vehicle body frame 1. A pressing spring 67c made of a coil spring and a retaining nut 67d are provided on the upper side of the biasing rod 67b, and the support arms 66a and 66a are connected to the first transmission belt via the connecting pins 66b and 66b. 62a and the second transmission belt 62b are configured to be biased toward the tension side. The biasing force in the pressing spring 67c is adjusted by adjusting the screwing position of the retaining nut 67d in the axial direction of the biasing rod 67b.

As shown in FIG. 9, the axis p3 of the relay shaft 63 is above the virtual line segment L1 connecting the axis p1 of the output shaft 61 of the engine 60 and the axis p2 of the input shaft 70 of the transmission case 7. It is provided at a position that is biased.
As a result, the belt transmission mechanism 62 including the first transmission belt 62a and the second transmission belt 62b stretched around the relay pulleys 63a and 63b is connected to the relay shaft 63 from the shaft center p1 of the output shaft 61 of the engine 60. Of the virtual line segment L2 directed to the axial center p3 of the transmission line and the virtual line segment L3 directed from the axial center p2 of the input shaft 70 of the mission case 7 to the axial center p3 of the relay shaft 63. It is stretched in a state where it has an angle and is bent like a dogleg upward.

As a result, on the lower side of the belt transmission mechanism 62, a triangular recess space s1 is formed corresponding to a portion protruding upward with an angle corresponding to the intersection angle α. It becomes. A mission support frame 13 that connects the left and right underbody support frames 12 and 12 and the like is disposed in a portion corresponding to the recessed space s1.
Temporarily, with the above structure, the belt transmission mechanism 62 is linearly stretched along a tangent line L4 (see FIG. 9) connecting the lower outer periphery of the traveling system output pulley 61a and the lower outer periphery of the traveling system input pulley 70a. In this case, as shown by hatching in FIG. 9, the transmission support frame 13 that connects the underbody support frames 12 and 12 and the belt transmission mechanism 62 are overlapped, and the belt transmission mechanism 62 is Although it will come into strong sliding contact with the mission support frame 13, it is possible to avoid such contact by causing the belt transmission mechanism 62 to bend so that the aforementioned recessed space s1 is formed.

[Operation linkage structure]
As shown in FIGS. 11 to 13, the structure of the attachment location of the threshing clutch lever 35 and the forward-rotation cutting clutch lever 36 provided in the side panel box 32 of the operating unit 3, and the threshing clutch lever 35 and the threshing clutch 101. The linkage structure is configured as follows.
That is, as shown in FIGS. 13A to 13C, the support shaft 38 that supports the threshing clutch lever 35 and the forward rotation cutting clutch lever 36 is located on the side close to the driver's seat 30 inside the side panel box 32. The support plate 32A provided on the side of the driver seat 30 is supported in a state where the end portion close to the driver seat 30 is inserted, and on the side far from the driver seat 30, a channel shape is formed so as to have an open space s2 on the upper side in a side view. Near the end of the support shaft 38 is supported by the guide stay 39 formed in the above.
The guide stay 39 is formed with a mounting hole 39a that can be pivotally supported by being inserted through the support shaft 38, and the width of the mounting hole 39a is wider than the diameter of the mounting hole 39a. Is formed so as to communicate with the upper open space s2.

The threshing clutch lever 35 is welded and fixed to the support shaft 38 so as to rotate integrally, and the forward-rotation cutting clutch lever 36 is pivotally supported so as to be relatively rotatable.
The support shaft 38 has a pin hole (not shown) into which a stop pin 38a can be inserted at the end closer to the driver seat 30 than the support plate 32A. A shaft step portion 38b having a small diameter is formed at a position located between the guide stay 39 and the guide stay 39. A flange portion 38c is formed at a position that contacts the outside of the guide stay 39 on the side farther from the driver seat 30 than the shaft step portion 38b, and from the driver seat 30 outside the guide stay 39. An operation arm portion 38d is provided at the far end.

  A threshing clutch operating mechanism 80 for operating the threshing clutch 101 is linked to the operation arm portion 38d. The threshing clutch operating mechanism 80 supports the operating body 81 that is swingably operated around the pivot point p4 on the free end side of the operating arm portion 38d, and the operating body 81 and the tension ring body 101a so as to be swingable. It is composed of a linkage member 82 made of a coil spring that connects between the tension arm 101b and the tension ring body 101a is brought into contact with the threshing transmission belt 54 as the clutch operating lever 35 swings. The clutch is in a tension state and can be switched between a clutch engagement state and a chopping state separated from the threshing transmission belt 54 to a relaxed state.

  The forward rotation cutting clutch lever 36 is configured to connect and operate the forward rotation cutting clutch 102 by connecting a connecting wire 36c to an operation arm 36b extending to the lower end side of the forward rotation cutting clutch lever 36. It is.

In order to mount the support shaft 38 on the support plate 32A and the guide stay 39, the shaft step portion 38b of the support shaft 38 positioned in the upper open space s2 opened in a channel shape of the guide stay 39 is The support shaft 38 is lowered to the position of the mounting hole 39a by fitting into the notch groove 39b of the guide stay 39.
At this time, the end of the support shaft 38 on the driver seat 30 side is not inserted through the shaft hole of the support plate 32A, and the support shaft 38 is moved so that the shaft stepped portion 38b approaches the driver seat 30 side. While approaching the driver seat 30 side, the end of the support shaft 38 on the driver seat 30 side is inserted into the shaft hole of the support plate 32 </ b> A, and the collar portion 38 c is contacted with the outer side of the guide stay 39 on the side far from the driver seat 30. Let
In this state, by inserting a stop pin 38a into the end of the support shaft 38 closer to the driver seat 30 than the support plate 32A, the support shaft 38 is supported in a state of being prevented from coming off, and the operation arm portion 38d is supported by the guide stay 39. It will be in the state located in the edge part of the side far from the said driver's seat 30 outside.

  A threshing clutch operating mechanism 80 linked to the threshing clutch lever 35 is provided outside the side panel box 32 below the inside of the side panel box 32 provided with the threshing clutch lever 35 and the forward rotation cutting clutch lever 36 as described above. As a result of the arrangement, there is a margin in space, and an exhaust pipe 60d of the muffler 60a of the engine 60 and the like are arranged at this portion as indicated by phantom lines in FIGS. 11 (b) and 13 (b). ing. At this time, the connecting wire 36c linked to the forward-rotation cutting clutch lever 36 can be freely set, so that it is arranged at a position avoiding the exhaust pipe 60d of the muffler 60a of the engine 60. .

As shown in FIGS. 11 and 12, the main speed change lever 33 provided in the side panel box 32 of the operation unit 3 is an arm that is swing-operated integrally with the swing operation of the main speed change lever 33. The portion 33 a and a trunnion shaft 71 a of a hydrostatic continuously variable transmission mechanism 71 as a main transmission provided on the transmission case 7 side are interlocked and connected by a main transmission operation mechanism 83.
The main speed change operation mechanism 83 is connected to the arm portion 33a and is bent at a middle portion and bent into a dogleg shape, and an operation arm 71b integrally attached to the trunnion shaft 71a has a horizontal axis p5. A lower rod 85 that is swingably connected around is connected.

A compression-biased coil spring 87 is interposed at the connecting portion between the upper rod 84 and the lower rod 85, and does not elastically deform when the main transmission lever 33 is operated within the operating range of the trunnion shaft 71a. However, when the operation amount of the main transmission lever 33 exceeds the operation limit of the trunnion shaft 71a, it is configured to be elastically deformable.
The lower rod 85 is provided vertically so as to have an axis substantially parallel to a vertical line passing through the trunnion shaft 71a. A length adjusting mechanism 86 formed of a turnbuckle is interposed in the middle portion in the length direction.

[Structure of prime mover]
As shown in FIGS. 14 and 15, in the prime mover 6, the engine 60, the muffler 60 a, the air cleaner 60 b, and the radiator 60 c are covered from above with a seat support 3 </ b> B that also serves as an engine bonnet.
As shown in FIGS. 14 and 15, in the seat support base 3 </ b> B, the engine 60 is disposed on the front side of the fuselage, and the air cleaner 60 b and the muffler 60 a are disposed on the rear side thereof. A radiator 60c is arranged on the side. The muffler 60a is arranged in a vertical cylinder shape that is long in the vertical direction in the lower space of the seat support 3B. An exhaust pipe 60d from the exhaust manifold of the engine 60 passes through the upper side of the engine 60 and is connected to the rear muffler. It connects to the upper end part of 60a, and is comprised so that it may exhaust from the lower end side of the muffler 60a.

A radiator support plate 68 for supporting the radiator 60c is provided upright on the lateral outer side of the radiator 60c. The radiator support plate 68 has an opening 68a having a size corresponding to the intake surface of the radiator 60c, and an outside air intake port 68b that supports the inlet side of the inlet hose 60e of the air cleaner 60b. is there.
A box-like air intake box 69 is provided integrally with the seat support base 3B. The box-like intake box 69 is provided outside the radiator support plate 68 with a dust-proof net 69a on the lateral outer side away from the radiator 60c, and the side close to the radiator 60c is opened. The intake box 69 and the seat support 3B are in an open posture in which the air intake box 69 and the seat support 3B fall down laterally outward about the longitudinal axis x2 along the right edge of the body frame 1 on the lower end side of the seat support 3B. The posture is switchable to a riding posture fixed on the driving unit step 3A.

At this time, the posture of the driver seat 30 is changed together with the intake box 69 and the seat support 3B, but the posture of the radiator 60c, the engine 60, the muffler 60a, and the air cleaner 60b on the inner side of the radiator support plate 68 is changed. The position remains fixed.
Further, on the inner side of the dust screen 69a of the intake box 69, a portion of the dust screen 69a that faces the front side of the radiator 60c and the front side of the radiator 60c are separated from the air cleaner 60b. A partition plate 69b is provided so as to separate the parts from each other, and the outside air to be supplied to the outside air intake port 68b for introducing outside air to the air cleaner 60b is provided on the side of the radiator 60c provided with a suction fan (not shown). It is trying to suppress being drawn into.

FIG. 16 shows a right lateral side portion of the operation unit step support frame 14 that supports the seat support 3B so as to be swingable about the longitudinal axis x2 and the right lateral side of the operation unit step support frame 14 is shown. An engagement hole (not shown) formed in the lower end portion of the seat support base 3B is engaged with a pair of front and rear brackets 14c, 14c protruding laterally outward from the side portions, and is supported so as to be swingable. I'm allowed.
The right lateral side portion of the driving unit step support frame 14 is connected and fixed to a front-rear main frame 10 constituted by a rectangular pipe of the vehicle body frame 1, a first horizontal main frame 11a, a second horizontal main frame 11b, and the like. ing.
A right lateral side portion of the driving unit step support frame 14 on the front side of the portion connected to the front-rear main frame 10 of the vehicle body frame 1 is formed in an L-shaped cross section although not shown.

[Crawler traveling device]
As shown in FIGS. 1, 6, and 10, the crawler traveling devices 2 and 2 are integrally formed by using an arch-shaped connecting member 21 that connects a pair of left and right track frames 20 and 20 at both front and rear ends. The crawler belt 24 is wound around the wheel 27, the guide wheel 26, and the drive sprocket 25 that are connected to each other and are provided on each of the left and right track frames 20, 20.
Each of the left and right track frames 20, 20 is formed by vertically welding rectangular pipes 20 a, 20 a having a substantially square cross section in a stacked state in two stages in the vertical direction, and is vertically elongated in the vertical direction. It is comprised so that it may become.

As a result, the position where the arch-shaped connecting member 21 that connects the left and right track frames 20, 20 is fixed to each track frame 20 by welding is positioned higher than the ground contact surface of the crawler belt 24. It becomes a state.
That is, for example, instead of stacking the rectangular pipes 20a, 20a in two stages in the vertical direction as described above, the track frame 20 is configured using one rectangular pipe, and the left and right track frames 20, 20 are arched. Compared with the structure connected with the connecting member 21 in the form of a ring, the connecting portion of the arched connecting member 21 that connects the track frames 20, 20 can be configured to be higher than the ground.
Thus, if the connection location of the arch-shaped connecting member 21 is raised to the ground, the possibility that the lower part of the arch-shaped connecting member 21 sinks into the mud of the traveling ground or the amount of subsidence can be reduced. This is advantageous in that it can easily reduce mud pushing.

[Other Embodiment 1]
As shown in FIG. 17, the crawler traveling devices 2 and 2 are mud between the upper surface side of each of the left and right track frames 20 and 20 and the inner peripheral surface side of the crawler belt 24 positioned on the upper side. A hollow box-like deposition prevention 29 is provided to prevent intrusion and deposition.
The anti-deposition body 29 includes a front anti-deposition body 29A positioned on the front side of the location where the idle roller 28 is in contact with the inner peripheral surface of the crawler belt 24, and a rear location where the idle roller 28 is present. It is comprised by the member isolate | separated into two front and back with the back part deposition prevention body 29B located in the side.

The front deposition preventing body 29A includes, as viewed from the side, the upper surface side of the track frame 20 on the front side, the rear surface side of the support stay 23, the front surface side of the idler roller 28 and the column 28a, and the inner periphery of the crawler belt 24. It is formed in a shape along the shape of the space portion surrounded by the surface side.
Then, the upper surface side of the track frame 20 on the front side, the rear surface side of the support stay 23 extending from the front end portion of the track frame 20 to the upper front side, and the idler roller 28 are attached to the upper surface side of the track frame 20. And a mounting piece provided with a connecting hole on the front side of the support post 28a, and a mounting piece provided with a connecting hole corresponding to the mounting piece is also provided on the front deposition preventing body 29A side. It is detachably mounted via a connecting bolt 9 that penetrates the connecting hole of each mounting piece.

The rear deposition preventing body 29B includes, as viewed from the side, the upper surface side of the track frame 20 on the rear side, the front surface side of the idler roller 28 and the column 28a, the upper side of the mounting portion 26b of the tension bolt 26a, and the crawler belt 24. It is formed in the shape along the shape of the space part enclosed by the inner peripheral surface side.
And the upper surface side of the track frame 20 on the rear side, the rear surface side of the support column 28a for attaching the idler roller 28 to the upper surface side of the track frame 20, and the upper side of the mounting portion 26b of the tension bolt 26a of the guide wheel 26 Are provided with attachment pieces each provided with a connection hole, and an attachment piece provided with a connection hole so as to correspond to the attachment piece is also provided on the rear deposition preventing body 29B side. It is detachably mounted via a connecting bolt 9 that penetrates the connecting hole.

  Further, each of the front deposition preventing body 29A and the rear deposition preventing body 29B has the same left / right width as that of the left and right track frames 20 or slightly wider than the left / right width of each track frame 20. It has a width in the direction, and is configured to easily prevent mud from accumulating on the track frames 20 and 20.

[Second embodiment]
In the above embodiment, between the input shaft 70 of the mission case 7 and the output shaft 61 of the engine 60 and above the virtual line segment L1 connecting the output shaft 61 of the engine 60 and the input shaft 70 of the mission case 7. Although a single relay shaft 63 is provided at a position biased to and the relay pulleys 63a and 63b are supported on the relay shaft 63, the present invention is not limited to this. For example, the relay shaft 60 and the relay pulley 63a are not limited thereto. 63b may be provided, and the belt transmission mechanism 62 may be provided with a plurality of refracting portions.
Other configurations may be the same as those in the above-described embodiment.

[3 of another embodiment]
In the above embodiment, the tension pulleys 66, 66 corresponding to the first transmission belt 62a and the second transmission belt 62b are respectively supported by the support arms 66a, which are swingably supported with respect to the single relay shaft 63. Although the structure attached to 66a is shown, it is not limited to this, and it may be supported so as to be swingable with respect to a member different from the relay shaft 63.
When the relay shaft 63 is composed of a plurality of relay shafts 63, the support arm 66a may be pivotally supported for each of the plurality of relay shafts 63.
Other configurations may be the same as those in the above-described embodiment.

[4 of another embodiment]
In the above embodiment, the relay shaft 63 that supports the relay pulleys 63a and 63b is supported by the support body 17 standing on the transmission support frame 13 as the body frame 1 at one end side in the left-right direction of the vehicle body, Although the end side has shown the structure supported by the horizontal wall 14a of the driving | operation part step support frame 14 provided on the vehicle body frame 1, it is not restricted to this, For example, both the left and right both ends of the relay shaft 63 are shown in the vehicle body frame 1 You may comprise so that it may support with the some support body 17 standingly arranged in this.
Other configurations may be the same as those in the above-described embodiment.

[5 of another embodiment]
In the above embodiment, the connecting portion of the arch-shaped connecting member 21 on the front end side with respect to the underbody support frame 12 is further forward than the first horizontal main frame 11a on the front end side of the horizontal main frame 11, and However, the present invention is not limited to this. For example, the connection position of the arch-shaped connection member 21 is the same as the position where the mission support frame 13 exists in the front-rear direction. May be set.
In this case, the mission support frame 13 is positioned on the upper side and the arch-shaped connecting member 21 is overlapped on the lower side. Further, the mission support frame 13 is omitted, and the arch-shaped connecting member 21 is used for the mission. The height position of the arch-shaped connecting member 21 may be increased to the height position where the mission support frame 13 should exist so as to also serve as the support frame 13.
Other configurations may be the same as those in the above-described embodiment.

  This type of combine is not limited to the ordinary combine as shown in the embodiment, and may be a self-removing combine. Moreover, it is not limited to harvesting grains such as rice and wheat, but may be harvesting beans such as soybeans and florets such as rapeseed.

DESCRIPTION OF SYMBOLS 1 Body frame 2 Crawler traveling apparatus 3A Driving | running | working part step 7 Mission case 10 Main frame 11 facing forward and backward 11 Horizontal main frame 12 Suspension support frame 12a Upper surface 13 Mission support frame 13a Upper surface 13b Mounting bracket 14 Driving | operation part step support frame 14a Side wall 17 Support body 20 track frame 21 connecting member 60 engine 61 output shaft 61a output pulley 62 belt transmission mechanism 62a first transmission belt 62b second transmission belt 63 relay shaft 63a relay pulley 63b relay pulley 66 tension pulley 66a support arm 70 input shaft 70a input pulley

Claims (6)

A pair of left and right crawler travel devices is disposed on the lower side of the vehicle body frame, and a combine in which a transmission case is provided on the front end side of the vehicle body frame,
The vehicle body frame has a front-rear main frame extending in the front-rear direction along the lateral outer edges on the left and right outer sides, and a lateral direction extended in the left-right direction so as to connect the front-rear main frames on the left and right outer sides. A main frame and a pair of left and right suspension support frames along the front-rear direction at a position closer to the center in the left-right direction than the front-rear main frame on the left and right outer sides;
The left and right underbody support frames are connected to arch-shaped connecting members that connect the track frames of a pair of left and right crawler travel devices to support the track frames,
The suspension support frame is provided to protrude forward from the lateral main frame at the front end position of the body frame,
A mission support frame is provided over a portion of the left and right underbody support frame that protrudes forward from the lateral main frame at the front end position, and the mission case is supported by the mission support frame. Combine to do.   2. The combine according to claim 1, wherein the arch-shaped connecting member is connected to the left and right underbody support frames on the front side of the horizontal main frame at the front end position.   The upper surface of the mission support frame that supports the mission case is connected to the left and right underbody support frames at the same height as or lower than the upper surfaces of the left and right underbody support frames. Combine.   A driving unit step is provided on one end side in the left-right direction of the vehicle body frame in front of the lateral main frame at the front end position, and one of the left and right suspension support frames is the driving support frame. The suspension support frame on the side that supports the operation unit step is extended to the front side longer than the suspension support frame on the other side. A combine according to any one of the above.   An engine is mounted on a lateral main frame on one end side of the body frame in which the operation unit step is provided in the left-right direction and on the rear side of the mission support frame, and the output shaft of the engine and the mission support frame 5. The combine according to claim 4, wherein a belt transmission mechanism for power transmission is provided between the input shaft of a transmission case mounted on the transmission case.   The belt transmission mechanism includes a first transmission belt stretched on an output pulley provided on an output shaft of the engine, a second transmission belt stretched on an input pulley provided on an input shaft of the transmission case, A relay pulley on which each of the first transmission belt and the second transmission belt is stretched, and a support body on which the relay shaft supporting the relay pulley is supported is erected on the transmission support frame. The combine according to claim 5.

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