JPH07277233A - Travel device of combine - Google Patents

Abstract

PURPOSE:To provide a combine which can perform harvesting operations well by keeping a machine height and a horizontally inclined position as desired. CONSTITUTION:To constitute a crawler travel device 1, driving wheel bodies 5 are installed on the front side of a machine frame 2; a transmission case is installed between the driving wheel bodies 5; idling wheels 7 which freely idle and tension wheels 8 are mounted on a support frame 6; and the crawler travel device 1 is supported against the machine frame 2 in such a way as to be capable of relative vertical motions via a link mechanism 11 having a pair of front and rear rocking links 12, 12. Further, rubber crawler belts 9 are wound over the driving wheel bodies 5, the idling wheels 7 and the tension wheels 8, and a control arm 12a which rocks integrally with the rear rocking link 12 is extended upwards and a hydraulic cylinder 14 is suspended over the portion of the machine frame 2 in front of the arm 12a so that the support frame 6 is raised and lowered relative to the machine frame 2, with the direction of rocking of the link mechanism 11 set so that the support frame 6 moves forward as it is lowered relative to the machine frame 2.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler traveling device for a work vehicle. 2. Description of the Related Art In a work vehicle having a crawler traveling device, the machine body is made horizontal when viewed from the front-rear direction regardless of the left-right inclination of the travel ground, and the travel ground is horizontal when viewed from the machine front-back direction. Even if the aircraft is tilted left and right,
Conventionally, for example, the one disclosed in Japanese Utility Model Laid-Open No. 59-18823 is capable of adjusting the lateral inclination of the body with respect to the traveling ground. That is, the entire crawler traveling device is configured to be able to perform a rolling operation with respect to the machine body. In the case of the above conventional configuration,
There has been a disadvantage that the transmission structure from the traveling machine body to the crawler traveling device must be provided with a flexibility for allowing the crawler traveling device to roll with respect to the traveling machine body, which makes the transmission structure complicated. An object of the present invention is to provide a vehicle body capable of adjusting its inclination with respect to the running ground while simplifying the transmission structure, and to make the inclination adjustment smooth. The crawler traveling device for a working vehicle according to the present invention is characterized in that the crawler driving wheel of each of the pair of left and right crawler traveling devices is attached to the traveling machine body via a transmission case. In at least one of the pair of the crawler traveling devices, a swing link is arranged so that the crawler grounding wheel body and the support frame for the crawler tensioning wheel body come closer to the crawler driving wheel body as they are lowered relative to the traveling machine body. A drive mechanism that is connected to the traveling machine body through a mechanism and that raises and lowers the support frame with respect to the traveling machine body is provided, and in order to configure the swing link mechanism, a pair of front and rear pivotally mounted to the traveling machine body is provided. A main swing link, an interlocking link that interlocks the pair of main swing links, and one of the pair of main swing links and the support frame. The sub-oscillation link for connecting the frame or the interlocking link is provided, and the operation and effect are as follows. When the drive mechanism is operated, due to the swing link mechanism, the support frame moves up and down with the same or substantially the same change in the space between the support frame and the traveling machine body over its entire length, and the crawler belt moves. The grounding part moves up and down with the same or almost the same change in the space between the grounding part and the traveling body, and the crawler drive wheel is fixed to the traveling body regardless of the lifting of the grounding part. However, there is little or no change in the tension of the crawler belt. This is because, as shown in the figure, for example, even if the support frame 6 is lowered, the distance between the crawler drive wheel 5 and the frontmost crawler grounding wheel 7 is longer than before the descent. Then, the distance between the crawler driving wheel 5 and the crawler tension wheel 8 becomes shorter than that before the descent, and the wrapping length over all the wheels does not change or does not change much before the descent. This is because it can be done by setting the dynamic link mechanism. That is,
Even if the crawler driving wheel is fixed to the traveling machine body, the entire crawler belt ground contact portion can be raised and lowered. The interlocking link connects the pair of main swing links, and the link mechanism operating force of the drive mechanism is reliably transmitted to both of the pair of main swing links, so that both main swing links that are rocked are twisted. Make it difficult. Even if there is a manufacturing error or an assembly error in the pair of main swing links, the main swing link, the support frame, the traveling machine body, and the interlocking link are connected to each other so that the pair of main swing links can swing smoothly without being twisted. That makes the sub swing link possible. As described above, since at least one of the pair of left and right crawler traveling devices can be operated to raise and lower the entire crawler belt grounding portion, the inclination of the machine body with respect to the traveling ground can be adjusted while driving the crawler. By fixing the wheel body to the traveling machine body, it is not necessary to provide a flexible structure for adjusting the inclination in the transmission structure from the traveling machine body to the crawler drive wheel body, which simplifies the transmission structure and is economically advantageous. . By the twisting prevention action of the interlocking link and the sub swing link, the swing operation of the link mechanism can be smoothly and reliably performed, and the tilt adjustment of the machine body can be performed accurately and smoothly. EXAMPLE As shown in FIG. 4, a planted culm is raised and cut at the front of a traveling machine equipped with a pair of left and right crawler traveling devices 1, 1 and equipped with a threshing device 3. A combiner is configured by providing a pretreatment device 4 for supplying the cut grain culm to the threshing device 3. Since the left and right crawler traveling devices 1, 1 have the same structure, hereinafter, the left crawler traveling device 1 will be described.
Will be described only. As shown in FIGS. 1 and 2, a crawler driving wheel 5 attached to a machine frame 2 constituting a traveling machine body via a transmission case 10, and a swing link mechanism 11 described later on the machine frame 2. A rubber crawler belt 9 is provided over each of a plurality of crawler grounding wheel bodies 7 and crawler tensioning wheel bodies 8 mounted on a support frame 6 connected via
The crawler belt 5 is driven by the power from the transmission case 10 to drive the crawler belt 9. The swing link mechanism 11 includes a pair of front and rear main swing links 12, 12 pivotally attached to the body frame 2.
The operation arm portion 12a of one of the main swing links 12 is so connected as to interlock the main swing links 12, 12.
And the operation arm portion 12a of the other main swinging link 12, both ends of which are separately connected to each other to prevent expansion and contraction of the interlocking link 13, and to prevent twisting due to manufacturing errors and assembly errors of the link mechanism constituent members. As described above, the main swing link 12 on the front side of the machine body and the sub swing link 19 that connects the support frame 6 are each configured. The rod portion 14a of the hydraulic cylinder 14 is interlocked with the operation arm portion 12a of the main swing link 12 on the rear side of the machine body,
Therefore, the support frame 6 can be moved up and down with respect to the machine body frame 2 by the hydraulic cylinder 14 as a drive mechanism. The hydraulic cylinders 14 are arranged on the right and left sides so that the right support frame 6 can be similarly moved up and down. By operating the hydraulic cylinders 14 and 14 individually, the inclination of the machine body with respect to the running ground is increased. It can be adjusted. More specifically, the hydraulic cylinder 14 transmits an operating force to both the front and rear main swing links 12 and 12 via the operating portion 12a and the interlocking link 13 to transmit the pair of main swing links 12 and 12. As the support frame 6 descends with respect to the machine body frame 2 along with this rocking operation, the support frame 6 moves up and down with respect to the machine body frame 2 in a state closer to the crawler driving wheel 5. is there. As the support frame 6 descends, the crawler driving wheel 5 is approached, so that the crawler belt 9 is wound up and down over the entire wheels 5, 7, and 8 regardless of whether the support frame 6 is lifted or lowered. There is little or no change from the previous one. Reference numeral 15 in FIG. 2 denotes an idle wheel, and a support arm 16 for supporting the idle wheel 15 is provided so as to be vertically swingable around a horizontal axis and urged downward. Has been. Reference numeral 17 in FIGS. 1 and 2 indicates the crawler belt 9
This is a screw shaft for adjusting the tension of the
By operating the rotation operating portion 17a provided on the support frame 6, the idle wheel 8 for tensioning the crawler with respect to the support frame 6 is provided.
The tension of the crawler belt 9 is adjusted by expanding and contracting the slide frame 18 provided with. [Other Embodiments] In the above embodiment, the inclination of the machine body is adjusted by raising and lowering both support frames 6 and 6, but it is also possible to raise and lower only one side 6. Further, in the above embodiment, the sub swing link 1
9 is provided between the main swing link 12 on the front side and the support frame 6, but it may be provided anywhere between one of the pair of main swing links 12 and 12 and the support frame 6 or the interlocking link 13. Good. INDUSTRIAL APPLICABILITY The present invention can be applied not only to a combine harvester but also to various work vehicles including a crawler traveling device such as an earthmoving machine. It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings] FIG. 1 is a cutaway plan view of a crawler traveling device. FIG. 2 is a side view of the crawler traveling device. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is a side view of the entire combine. [Explanation of symbols] 1 Crawler traveling device 5 Crawler drive wheel 6 Support frame 7 Wheel for crawler grounding part 8 Crawler tension wheel 12 Main swing link 13 interlocking links 14 Drive mechanism 19 Sub swing link

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[Procedure Amendment] [Submission Date] March 15, 1995 [Procedure Amendment 1] [Amendment Document Name] Specification [Amendment Item Name] Full Text [Amendment Method] Change [Amendment Content] [Document Name] Specification Book [Title of the Invention] Traveling device of combine [Claims] [Claim] A cutting machine (4) is connected to the front part of a traveling machine body having a pair of left and right crawler traveling devices (1) and traveling
Combined traveling equipment equipped with a threshing device (3) on the machine body
In order to configure the crawler traveling device (1), a driving wheel body (5) is provided on the forward side of the machine body frame (2), and each driving wheel body of the left and right crawler traveling device (1) ( 5) The transmission case (10) is arranged between them, and the idle wheel (7) and tension are set.
The support wheel (6) is equipped with free wheels (8) for
Attach the holding frame (6) to the pair of front and rear swing links (12),
Move up and down relative to the machine frame (6) via (12)
And a supporting wheel (5), an idle wheel (7),
And a rubber crawler over the tension wheel (8)
Winding the belt (9), the swing links (12), (1
2) is equipped with a hydraulic cylinder (14) for swinging drive,
The swing direction of these swing links (12), (12)
The support frame (6) faces the fuselage frame (2).
And the supporting frame (6) is moved forward
It is characterized in that it is set to move in the advancing direction.
The combine traveling device. Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine traveling device configured to travel by a pair of left and right crawler traveling devices. 2. Description of the Related Art In a combine operation in a wet field, a crawler traveling device often sinks in a field. At this time, as a means for lifting the machine to a desired level, for example, Japanese Utility Model Laid-Open No. 58-174385. As shown in, the support frame equipped with the ground side idler wheel is connected to the machine frame via the link mechanism, and the link mechanism is rockably driven by the hydraulic cylinder to move the support frame relative to the machine frame. It is known that by vertically moving up and down, the ground contact side of the crawler belts of the left and right crawler traveling devices are relatively moved up and down in synchronization with the machine body by the same amount. However, since the above-mentioned known technique has a structure in which the support frames of the left and right crawler traveling devices are synchronously moved up and down in the same direction, the machine body is moved up and down in parallel. However, it does not have a function to correct the tilt of the aircraft to the left or right, and if the aircraft tilts to the left or right due to the difference in the sinking amount on the left and right crawler traveling devices in the wetland, ridged wheat etc. When one of the left and right crawler traveling devices travels on the ridge and the other travels between the ridges and the machine leans to the left or right during harvesting, or the weight balance of the machine itself due to the weight of the attached equipment and harvest. It was not possible to deal with the case of collapse and tilt left and right. Further, in the above-mentioned publicly known example, since the tension free wheel is mounted on the machine body frame side, in order to absorb the increase in the winding length of the crawler belt when the supporting frame is relatively lowered with respect to the machine body frame. First, it is necessary to have a structure in which the tension free wheel is displaced backward by the tension of the crawler belt, that is, an automatic tension structure. However, if you set the freewheel for tension to an automatic tension structure so that you can move freely,
For example, when the crawler traveling device hits a ridge or the like during reverse travel, the tension free wheel is displaced toward the belt loosening side, causing the crawler belt to loosen, resulting in derailment. It is easy to invite. Also, it is necessary to set the amount of movement of the tension free wheel according to the amount of elevation of the support frame so that the greater the amount of elevation, the greater the amount of elevation of the support frame. Due to the characteristic that the tension force changes greatly due to the automatic tension of the idle wheel, it is difficult to keep the tension of the crawler belt constant with the automatic tension structure, and it is not possible to smoothly remove or lift the crawler belt. However, there were various problems such that it was difficult to set the lifting amount of the support frame too large. The present invention has been made by paying attention to such a point, and by improving the elevating structure of the crawler traveling device, it is possible to arbitrarily and appropriately adjust the height of the crawler and the lateral inclination of the crawler. It is an object of the present invention to provide a combine traveling device capable of favorably maintaining a desired body height and a right and left inclined posture regardless of a field and performing a combine operation satisfactorily. [0004] The technical means of the present invention taken to achieve the above object are as follows. That is, the present invention, while connecting the mowing pretreatment device to the front part of the traveling machine body provided with a pair of left and right crawler traveling device,
In a combine traveling device in which a threshing device is mounted on a traveling machine body, to configure the crawler traveling device, a drive wheel is provided on the forward direction side of the machine frame, and each drive wheel of the left and right crawler traveling devices is arranged. Deploy a transmission case in between,
An idle wheel and a tension idle wheel are mounted on a support frame, and the support frame is supported on the machine body frame via a pair of front and rear swing links so as to be capable of relative vertical movement. A rubber crawler belt is wound around the wheel and the tension freewheel to provide a hydraulic cylinder for oscillating the oscillating link, and the oscillating direction of the oscillating link is the supporting frame. Is set so that the supporting frame moves toward the forward direction side as the vehicle lowers relative to the machine body frame. According to the structure of the present invention, the support frames of the left and right crawler traveling devices can be moved up and down in parallel by moving the support frames in the same direction in the same amount relative to the machine frame. In addition, each support frame of the left and right crawler traveling devices can be individually and arbitrarily driven and moved up and down relative to the machine frame, so that the height of each ground portion of the left and right crawler traveling devices with respect to the machine frame is different. Therefore, it becomes possible to adjust the lateral inclination of the aircraft. In the operation of raising and lowering each of the support frames, for example, when the support frame is relatively lowered from a raised state (a state where the body height is low) close to the machine frame and the machine body is relatively driven and raised, the support is performed. Although the vertical distance between the idle wheel at the front of the frame and the drive wheel increases, the entire support frame approaches the drive wheel side, and the idle wheel for tension provided at the rear of the drive frame and the support frame. Since the distance between the crawler belt and the support frame is lowered relative to the machine frame, the crawler belt wrapping length is made approximately the same as that before the descent, and the crawler belt tension is kept substantially constant. The support frame can be raised and lowered smoothly. Moreover, since the support frame equipped with the idle wheel and the tension idle wheel is moved up and down, and the rubber belt is used as the crawler belt, the support frame of the swing link swings. Due to the difference between the vertical movement amount and the front-back movement amount caused by the vertical movement, it is difficult to move the belt while keeping the circumference of the belt unchanged.
Even if there is some error in the trajectory of the swing link or the fulcrum position for raising and lowering the support frame while keeping the belt at a constant circumference, the elasticity of the belt itself is used to absorb the error, and thus the crawler belt It is possible to more effectively raise and lower the support frame while keeping the circumferential length of the support frame substantially constant. In addition, since the combine is equipped with a paddy tank, a waste straw processing device, etc., it is generally pre-balanced, but the lowering of the support frame is moved to the forward direction side where the drive wheels are installed. This is done by tilting the front-balanced machine body forward and preventing the cutting blade of the pre-cutting device from plunging into the soil, which interferes with the cutting work, and the transmission case between the drive wheels. It is possible to prevent running obstacles due to mud pushing. The swing link and the hydraulic cylinder ensure the parallelism of the machine body frame with respect to the support frame, and the machine body can be lifted and lowered in a stable posture. Therefore, the present invention exhibits the following effects. That is, according to the present invention, since the grounding portions of the left and right crawler traveling devices can be individually moved up and down relative to the machine body, the machine body can be moved up and down in parallel by the synchronized lifting operation.
It is possible to adjust the left and right inclination of the machine body by any arbitrary raising and lowering operation, and it is possible to work while maintaining the right and left inclined posture of the machine body appropriately according to the field conditions and the left and right weight balance of the machine body itself. This makes it possible to obtain a combine excellent in reaping work performance. A support frame equipped with idle wheels and tension idle wheels is moved up and down, and by combining it with a rubber crawler belt, the wrapping length of the crawler belt is always kept substantially constant, and the tension is maintained. The support frame can be smoothly moved up and down while maintaining a substantially constant state, and the number of wheels can be reduced so that the support frame can be raised and lowered more effectively while keeping the crawler belt circumferential length substantially constant. it can. The aircraft can be lifted and lowered in a stable posture, and when raising the aircraft in a wetland where the combine traveling device sinks to perform mowing work, the aircraft leans forward and the cutting blade plunges into the soil. This makes it possible to prevent the reaping work from being made difficult, and to prevent traveling obstruction due to the transmission case between the drive wheels. EXAMPLE As shown in FIG. 4, a planted culm is raised and cut at the front of a traveling machine equipped with a pair of left and right crawler traveling devices 1, 1 and equipped with a threshing device 3. A combiner is configured by providing a pretreatment device 4 for supplying the cut grain culm to the threshing device 3. Since the left and right crawler traveling devices 1, 1 have the same structure, hereinafter, the left crawler traveling device 1 will be described.
Will be described only. As shown in FIGS. 1 and 2, a driving wheel body 5 mounted on a machine body frame 2 constituting a traveling machine body via a transmission case 10, and a rocking link mechanism 11 described later on the machine body frame 2. A rubber crawler belt 9 is wound around each of a plurality of idler wheels 7 attached to a support frame 6 connected together and tensioning idler wheels (idle wheels having a function of adjusting tension) 8. The drive wheel 5 is driven by the power from the transmission case 10 to drive the crawler belt 9. The swing link mechanism 11 includes a pair of front and rear main swing links 12, 12 pivotally attached to the body frame 2.
The operation arm portion 12a of one of the main swing links 12 is so connected as to interlock the main swing links 12, 12.
And an adjustable arm 1a of the other main swinging link 12, both ends of which are separately connected to each other and which is adjustable in expansion and contraction.
3. Each of the sub swing links 19 connecting the main swing link 12 on the front side of the machine and the support frame 6 so as to prevent twisting due to manufacturing errors and assembly errors of the link mechanism constituent members. It consists of The rod portion 14a of the hydraulic cylinder 14 is interlocked with the operation arm portion 12a of the main swing link 12 on the rear side of the machine body, so that the support frame 6 is moved up and down with respect to the machine body frame 2 by the hydraulic cylinder 14 as a drive mechanism. It can be operated. The hydraulic cylinders 14 are arranged on the right and left sides so that the right support frame 6 can be similarly moved up and down. By operating the hydraulic cylinders 14 and 14 individually, the inclination of the machine body with respect to the running ground is increased. It can be adjusted. More specifically, the hydraulic cylinder 14 oscillates the pair of main swing links 12, 12 by transmitting an operating force to the pair of front and rear main swing links 12, 12 via the operating portion 12a and the rod 13. With respect to the machine body frame 2, the support frame 6 moves toward the front side where the drive wheel body 5 exists in the front-rear direction as the support frame 6 lowers relative to the machine body frame 2 with this swinging. It is designed to go up and down. Even if the support frame 6 is relatively lowered, the distance between the driving wheel body 5 and the frontmost freewheel 7 provided on the support frame 6 is longer than before the lowering, whereas the entire support frame 6 is By moving to the drive wheel 5 existing side in the front-rear direction, the distance between the drive wheel 5 and the tension freewheel 8 becomes shorter than before the descent, and the increase in the crawler belt winding path length [frontmost] Between the idle wheel 7 and the drive wheel 5] and the reduced amount [between the drive wheel 5 and the tension idler wheel 8] are offset, and the support frame 6 is moved relative to the machine body. The crawler belt winding path length across the drive wheel body 5, the idle wheel 7 and the tension idle wheel 8 when lowered is substantially the same as that before the descent. Reference numeral 15 in FIG. 2 denotes a movable roller wheel provided at an intermediate portion of the support frame 6 in the front-rear direction, and a support arm 16 for supporting the movable roller wheel 15 is vertically swingable around a horizontal axis. Further, it is provided on the support frame 6 while being urged downward. Further, 17 in FIGS. 1 and 2 is a screw shaft for adjusting the tension of the crawler belt 9,
By operating the rotation operation portion 17a provided on the screw shaft 17, the tension free wheel 8 is attached to the support frame 6.
The tension of the crawler belt 9 is adjusted by expanding and contracting the slide frame 18 provided with. [Other Embodiments] In the above-described embodiment, the sub swing link 19 is provided between the front main swing link 12 and the support frame 6, but the pair of main swing links 12,
It may be provided anywhere between one of 12 and the support frame 6 or the rod 13. It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cutaway plan view of a crawler traveling device. FIG. 2 is a side view of the crawler traveling device. FIG. 3 is a sectional view taken along the line III-III in FIG. [Description of symbols] 1 crawler traveling device 2 machine body frame 3 threshing device 4 pre-cutting device 5 drive wheel body 6 support frame 7 idler wheel 8 idler wheel 12 for tensioning swing link 14 hydraulic cylinder

Claims (1)

What is claimed is: 1. A combine harvester comprising a pair of left and right crawler traveling devices (1) having a cutting pretreatment section (4) connected to the front part of the traveling machine body and a threshing device (3) mounted on the traveling machine body. In order to configure the crawler traveling device (1), a driving wheel body (5) is provided on the forward direction side of the machine body frame (2), and each driving wheel body (5) of the left and right crawler traveling device (1). A transmission case (10) is provided between the two, and a freely rotatable wheel (7) and tension wheel (8) are equipped with a support frame (6). Link (1
2) and (12) are supported on the machine body frame (6) via a link mechanism (11) so as to be capable of relative vertical movement, and the drive wheel body (5), the wheel wheels (7), and the tension Ring (8)
A rubber crawler belt (9) is wound around the operation crawler belt (9), and an operation arm (12a) integrally swinging with the swing link (12) on the rear side is extended upward, and the operation arm (1
2a) and the machine body frame (2) portion on the front side of the hydraulic cylinder (14), and the operation arm (12)
The supporting frame (6) is configured to move up and down relative to the machine body frame (6) by swinging driving a) with the hydraulic cylinder (14), and the support frame (6) with respect to the machine body frame (2). The combine is characterized in that the swinging direction of the link mechanism (11) is set so that the support frame (6) moves toward the forward direction side as it relatively descends.