JP2014097731A - Crawler travel device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crawler travel device capable of easily and comfortably removing a crawler guide.SOLUTION: A support body 60 rockably supported around the rocking axis P by a truck frame 20 is provided with a support body main body 64 for connecting a connection boss part 61 rotatably connected to the truck frame 20 and a pair of front-rear support boss parts 62 and 63 for respectively, separately and rotatably supporting a pair of front-rear grounding rolling wheels 23 and 23 in a place separately positioned on the front-rear side of a travel device to the rocking axis P. The crawler guide 40 is provided with a connection part 42 connected to the support body main body 64 by projecting in the upward direction of the travel device from a crawler guide main body 41. The connection part 42 is detachably connected to a lateral outside surface of the travel device of the support body main body 64.

Description

  The present invention includes a support body supported on a track frame so as to be swingable about a swing axis of a traveling device laterally, and supported by the support, and swings about the swing axis of the track frame. A pair of free front and rear grounding wheels, and a crawler guide supported by the support and swingable integrally with the pair of front and rear grounding wheels around the swing axis about the track frame. The present invention relates to a crawler traveling device.

  Conventionally, as disclosed in Japanese Patent Application Laid-Open No. H10-228867, two left and right rocking plates are supported on a crawler frame via a rocking shaft so as to be swingable, and are supported by a lower portion of the rocking plate. A pair of front and rear wheels that can swing around the swing shaft, and supported by the lower part of the swing plate, can swing together with the pair of front and rear wheels around the swing shaft with respect to the crawler frame. There is a crawler travel device provided with a guide body as a crawler guide. The guide body includes a mounting leg provided at the center, and the swinging plate is connected to the swinging plate by a mounting bolt in a state where the mounting leg is positioned between the left and right swinging plates. It is connected to.

Japanese Patent Laid-Open No. 10-119834

  In the above-described crawler traveling device, the crawler guide is likely to be worn by contact with the crawler belt, and the crawler guide needs to be replaced. If it is possible to remove the crawler guide from the support (two swing plates on the left and right) without removing the support from the track frame, it is advantageous to replace the crawler guide at a low cost. When the above-described conventional technique is adopted so that the crawler guide can be attached to and detached from the support, it takes time and effort to remove the crawler guide.

  That is, when the conventional technique is adopted, the crawler guide main body and the crawler belt of the crawler guide are configured so that the connecting portion provided in the crawler guide enters the inside of the support so as to enable connection to the support. For this reason, even if the connection between the connecting portion and the support is released, the connecting portion does not come off from the support both in the lateral direction of the traveling device and in the vertical direction of the traveling device, and the crawler guide cannot be taken out. Therefore, an operation such as switching the crawler belt to a state in which the crawler belt can be relaxed downward is performed, the crawler guide is lowered with respect to the support body, and the connecting portion of the crawler guide is taken out from the support body laterally outside, and thereafter It was necessary to lift the crawler guide and take out the crawler guide body from the crawler belt to the lateral side of the traveling device.

  An object of the present invention is to provide a crawler traveling device that can easily and easily remove a crawler guide.

The crawler traveling device according to the present invention includes:
A support body that is swingably supported by a track frame about a swing shaft core that is lateral to the traveling device, and a pair of front and rear that is supported by the support body and swingable about the swing shaft core with respect to the track frame. And a crawler guide that is supported by the support and is swingable integrally with the pair of front and rear grounding wheels around the pivot axis with respect to the track frame,
A connecting boss portion that is rotatably connected to the track frame, and a pair of front and rear grounding wheels that are separately located on the front and rear sides of the traveling device with respect to the pivot shaft. A pair of front and rear support boss portions that are rotatably supported, and a support body that connects the connection boss portion and the pair of front and rear support boss portions;
The crawler guide includes a crawler guide main body, and a connecting portion that protrudes upward from the crawler guide main body and is connected to the support main body.
The connecting portion is detachably connected to a lateral side surface of the traveling body of the support body.

  According to this configuration, if the connection between the connecting portion of the crawler guide and the support body is released, the connecting portion of the crawler guide disengages from the support body to the lateral side of the traveling device, and the crawler guide slides upward with respect to the support. It can be moved. Therefore, after releasing the connection between the connecting portion of the crawler guide and the support body, the crawler guide body and the crawler belt are disengaged by lifting the crawler guide, and the crawler guide body is moved from the crawler belt to the lateral side of the traveling device. And the entire crawler guide can be taken out to the lateral side of the traveling device.

  Therefore, according to the present invention, not only the crawler guide can be removed without removing the support from the track frame, but also the crawler guide in a state where the connection of the connecting portion to the support body is released can be lifted up. The crawler guide can be easily removed from the crawler travel device by operation, so that the crawler guide can be replaced inexpensively and easily.

  In the present invention, it is preferable that the portion of the support body to which the connecting portion is connected is biased to the inner side of the traveling device with respect to the center of the grounding wheel in the lateral direction of the traveling device.

  According to this configuration, the portion of the support body to which the crawler guide connecting portion is connected is biased to the lateral side of the traveling device with respect to the crawler guide main body. While the thickness of the crawler guide is increased and the shape of the connecting portion of the crawler guide in the longitudinal direction of the traveling device is made simple in the vertical direction with little bending or unevenness, the connecting portion is the lateral outer side surface of the supporting device main body. Can be linked to.

  Therefore, according to the present invention, the connecting portion of the crawler guide body is configured to have a thick and simple shape while connecting the connecting portion of the crawler guide to the lateral side surface of the traveling body of the supporting body. Can be firmly connected.

  In the present invention, it is preferable that the connecting portion is provided with a contact portion that abuts from below on a portion of the support body to which the connecting portion is connected.

  According to this configuration, since the support body is in contact with the contact portion of the connecting portion and receives and supports the crawler guide, the support body can be firmly supported against the ground reaction force of the crawler guide.

  Therefore, according to the present invention, even when a strong ground reaction force is applied to the crawler guide main body, the crawler guide is firmly supported by the support, and it is easy to avoid breakage and deformation of the crawler guide.

  In the present invention, it is preferable that a connecting seat portion capable of detachably connecting end portions in the front-rear direction of the crawler guide main body is provided on each of the outer peripheral surfaces of the pair of front and rear support boss portions.

  According to this configuration, the front and rear ends of the crawler guide main body are supported even when a strong ground reaction force is applied to the front and rear end of the crawler guide main body due to the crawler guide main body tilting with respect to the track frame. It is connected to the body and firmly supported.

  Therefore, according to the present invention, even if a strong ground reaction force is applied to the front end side and the rear end side of the crawler guide main body, the crawler guide main body is hardly deformed or damaged.

In the present invention, the connecting seat portion includes a connecting bolt for detachably connecting an end portion in the front-rear direction of the crawler guide main body, and the connecting bolt is provided on the support boss portion on the front side. It is configured to be fastened from the front outer side of the support boss part in the posture of the traveling device front and rear,
It is preferable that the connecting seat portion provided on the support boss portion on the rear side is configured such that the connecting bolt is fastened from the rear outer side of the support boss portion in a traveling device front-back orientation.

  According to this configuration, the connecting bolt for detaching the front end portion and the rear end portion of the crawler guide main body from the support body may be tightened or loosened from the front outer side or rear outer side of the support boss portion in the longitudinal direction of the traveling device. The fastening and removal of the connecting bolt with respect to the connecting seat can be easily performed.

  Therefore, according to the present invention, in order to detach the front end portion and the rear end portion of the crawler guide main body from the support body, it is possible to easily and quickly fasten and remove the connecting bolt easily.

  In the present invention, an oil supply port for supplying grease to the support boss portion is provided in a portion of the outer peripheral surface of the pair of front and rear support boss portions that is located above the end of the crawler guide body in the front-rear direction. It is preferable.

  According to this configuration, the front end portion and the rear end portion of the guide rail main body and the oil supply port are in a positional relationship that is displaced in the vertical direction of the traveling device, and the guide rail main body is unlikely to be an obstacle to supplying grease to the oil supply port.

  Therefore, according to the present invention, it is difficult for the guide rail body to obstruct the supply of grease to the support boss portion, and the grease supply operation can be performed easily and quickly.

  In the present invention, it is preferable that the oil supply port is located above the traveling device with respect to the rotation axis of the grounding wheel.

  According to this configuration, the oil filling port is located away from the crawler belt located below the grounded wheel on the traveling device upper side, and the crawler belt is unlikely to be an obstacle to supplying grease to the oil filling port.

  Therefore, according to the present invention, the crawler belt is less likely to become an obstacle for supplying grease to the support boss portion, and can be easily and quickly performed.

  In the present invention, each of the outer peripheral surfaces of the pair of front and rear support boss portions is provided with an oil supply seat portion that forms an oil supply port for supplying grease to the support boss portion, and a grease nipple of the oil supply seat portions is mounted. It is preferable that the nipple mounting seat surface and the guide connection seat surface to which the front and rear ends of the crawler guide main body of the connection seat portions are connected are flush with each other.

  According to this configuration, the portion of the supporting boss portion that includes the oiling seat portion and the connecting seat portion has a simple shape in which the nipple mounting surface and the guide connecting seat surface are flush with each other. The part and the connecting seat part can be provided on the support boss part.

  Therefore, according to the present invention, the end portion of the crawler guide main body is connected to the outer peripheral surface of the support boss portion and the oil supply port is provided, but the portion including the oil supply seat portion and the connection seat portion of the support boss portion is provided. The shape becomes a simple shape, and the mud pool is not likely to be generated at that part.

  In the present invention, it is preferable that a traveling device laterally connecting bolt that connects the connecting portion to the support body is provided, and the connecting bolt is located between the rotation shaft cores of the pair of front and rear grounding wheels.

  According to this configuration, the crawler guide is equipped with the support, the grounding wheel, and the crawler guide in a compact state in which the connecting portion of the crawler guide enters and connects the portion of the support between the pair of front and rear support bosses. it can.

  Therefore, according to the present invention, the crawler traveling device can be simplified by mounting the support, the grounding wheel and the crawler guide in a compact manner on the crawler traveling device.

  In the present invention, it is preferable that a traveling device laterally connecting bolt for coupling the coupling portion to the support body is provided, and the coupling bolt is positioned below the traveling device with respect to the pivot shaft.

  According to this configuration, the crawler guide can be connected to the support body while shortening the length of the connecting portion of the crawler guide protruding upward from the crawler guide body toward the traveling device.

  Therefore, according to the present invention, the crawler guide can be obtained in a compact state in which the protruding length of the connecting portion is short, and the weight can be reduced.

  In the present invention, it is preferable that the connection bolt is positioned below the traveling device with respect to the rotation axis of the pair of front and rear ground wheels.

  According to this configuration, the crawler guide can be connected to the support body while the length of the connecting portion of the crawler guide protruding from the crawler guide body upward in the traveling device is further shortened.

  Therefore, according to the present invention, the crawler guide can be obtained in a more compact state where the protruding length of the connecting portion is shorter, and the weight can be reduced.

  In the present invention, it is preferable that the connecting bolt is located at a position displaced to the outer peripheral side with respect to the pair of front and rear grounding wheels in a side view of the traveling device.

  According to this configuration, there is no grounding wheel on the lateral side of the connecting bolt traveling device, and the grounding wheel is unlikely to become an obstacle when the connecting bolt is rotated.

  Therefore, according to the present invention, when the crawler guide is exchanged, the grounding wheel is hardly obstructed, and the connecting bolt can be easily and quickly attached and removed, so that the work can be efficiently performed.

It is a side view which shows the whole combine. It is a side view which shows the crawler traveling apparatus on the left side. It is a top view which shows the crawler traveling apparatus on the left side. It is a side view which shows the rear part of the crawler traveling apparatus on the left side. It is a side view which shows the connection structure of a rocking | fluctuation operation arm and a raising / lowering cylinder. FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5. It is a VII-VII cross-sectional arrow view of FIG. It is a side view which shows the support structure of a grounding roller and a crawler guide. It is a top view which shows the support structure of a grounding roller and a crawler guide. It is a vertical front view which shows a support body and a crawler guide. It is a cross-sectional top view which shows a support body and a crawler guide. It is a side view which shows a support body and a crawler guide. It is a side view which shows a support body. It is a side view which shows a crawler guide. It is a front view which shows a front connection seat part and an oiling seat part. It is a side view which shows the crawler guide of a fixed state. It is a top view which shows the crawler guide of a fixed state. It is a side view which shows the cancellation link of the state which approached the front support part. It is a perspective view which shows a front support part. It is sectional drawing which shows the oil supply structure in the connection part of a cancellation link and a track frame. It is a XXI-XXI cross-sectional arrow view of FIG. It is XXII-XXII sectional arrow view of FIG. It is a side view which shows the support structure of the crawler guide provided with another embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing an entire combine equipped with a crawler traveling device according to an embodiment of the present invention. As shown in FIG. 1, the combine includes a pair of left and right crawler traveling devices 1, 1, and is driven from an engine (not shown) provided below the driver seat 2 with the pair of left and right crawler traveling devices 1, 1. A traveling machine body configured to be driven by force and to be self-propelled, a cutting unit 4 connected to the front part of the machine body frame 3 of the traveling machine body, a threshing device 5 and a grain provided at the rear part of the body frame 3 And a tank 6.

  In this combine, the cutting unit 4 is swingably moved up and down by the hydraulic cylinder 7 between the lowered working position and the raised non-working position. By moving the traveling machine body with the cutting unit 4 in the lowered working position, Harvest work such as wheat.

  That is, the reaping unit 4 raises the planted culm and causes it to be reaped by the clipper-shaped reaper 4b while being caused by the device 4a. Supply to the feed chain 5a. The threshing device 5 sandwiches and conveys the stock side of the harvested cereal meal by the threshing feed chain 5a, supplies the tip side of the harvested grain meal to a handling chamber (not shown), and rotates the handling cylinder (see FIG. (Not shown) The grain tank 6 is configured to collect and store the threshed grains conveyed from the threshing device 5 and carry out the stored threshed grains by the auger 8.

The crawler traveling device 1 will be described.
The pair of left and right crawler traveling devices 1 and 1 have the same configuration, and the illustration of the right crawler traveling device 1 is omitted.

  FIG. 2 is a side view showing the entire crawler traveling device 1 on the left side. FIG. 3 is a plan view showing the crawler traveling device 1 on the left side. As shown in FIGS. 2 and 3, the crawler traveling device 1 is supported on the body frame 3 by a track frame 20 that is supported by the body frame 3 via a pair of front and rear support arms 10 and 10, and at a front portion of the track frame 20. The crawler driving wheel body 21, the crawler tensioning wheel body 22 supported at the rear end of the track frame 20, and the crawler driving wheel body 21 and the crawler tensioning wheel body 22 aligned in the longitudinal direction of the traveling device And a pair of front and rear upper guide wheels 25 and 25 supported by the body frame 3 between the eight grounding wheels 23 and 24 supported by the track frame 20 and the crawler driving wheel 21 and the crawler tension ring body 22. And a rubber crawler belt 26 wound around all the ring bodies 21, 22, 25 and all the grounded rolling wheels 23, 24.

  The crawler drive wheel body 21 is supported by the body frame 3 via a mission case 11 (see FIG. 1) provided at the front portion of the body frame 3. More specifically, the crawler drive wheel body 21 is rotatably supported by a cylindrical crawler drive case portion 11b provided in the mission case 11 in a state of extending from the lateral side portion of the mission case body outwardly to the aircraft body. ing. The crawler driving wheel body 21 is configured to be driven by a driving force transmitted from the engine to the mission case 11.

  The crawler tension ring body 22 is supported by a tension frame portion 27 provided at the rear end portion of the track frame 20. The crawler tension ring body 22 is moved and adjusted in the longitudinal direction of the traveling device with respect to the track frame 20 and fixed at the adjustment position by adjusting the tension frame portion 27 with the adjustment screw 28 and being fixed at the adjustment position. Then, the tension of the crawler belt 26 is adjusted.

  The front guide wheel body 25 on the front side and the rear side is rotatably supported by a support shaft 29 (see FIG. 4) that extends from the machine body frame 3 outwardly from the machine body.

  The pair of front and rear support arms 10 and 10 are supported by the support portion 3a of the body frame 3 so as to be swingable up and down via a rotation support shaft 10a connected to the base end portion of the support arm 10 so as to be integrally rotatable. As shown in FIG. 2, a swing operation arm 12 that is provided so as to be integrally rotatable at the end of the rotary support shaft 10 a of the front support arm 10 and a cylinder support portion (not shown) provided on the fuselage frame 3. ) And an elevating cylinder 13 made of a hydraulic cylinder.

  The front end side of the rear support arm 10 and the track frame 20 are connected via a cancel link 14. As shown in FIG. 2, the swing operation arm 12 provided integrally with the end of the rotating support shaft 10 a of the support arm 10 on the rear side so as to be rotatable integrally with the cylinder support portion 3 b provided on the body frame 3 is covered. A lifting cylinder 15 made of a hydraulic cylinder is connected.

  That is, the front support arm 10 is swung up and down by a swing operation of the front swing operation arm 12 by the lift cylinder 13, and the rear side swing operation is performed by swinging the rear swing operation arm 12 by the lift cylinder 15. When the support arm 10 is swung up and down, the connection height of the track frame 20 to the machine frame 3 is changed, and the ground height on the left side of the machine frame 3 can be adjusted.

  Accordingly, by appropriately extending and retracting the elevating cylinders 13 and 15 for the left and right crawler traveling devices 1, the connection height of the track frame 20 to the body frame 3 in the left and right crawler traveling devices 1 is the same. The aircraft frame 3 can be adjusted up and down parallel to the ground by changing the height, or the connection height of the track frame 20 to the aircraft frame 3 in the left crawler traveling device 1 and the crawler traveling device on the right side. 1 is configured such that the connection height of the track frame 20 to the body frame 3 in 1 is changed and adjusted to a different connection height, so that the body frame 3 can be tilted to the left and right with respect to the ground.

  FIG. 5 is a side view showing a connection structure between the swing operation arm 12, the lifting cylinder 13 and the lifting cylinder 15. 6 is a cross-sectional view taken along the line VI-VI in FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. As shown in FIGS. 5, 6, and 7, the connection structure of the swing operation arm 12 and the lifting cylinders 13 and 15 is a yoke-shaped connection that is connected to the ends of the cylinder rods 13 a and 15 a of the lifting cylinders 13 and 15. A connecting pin 32 that is provided between the end of the swing operation arm 12 and the pair of connecting arm portions 31a, 31a that are provided between the pair of connecting arm portions 31a, 31a provided on the connecting device 31. Thus, the connecting tool 31 and the swing operation arm 12 are connected so as to be relatively rotatable.

  The connection tool 31 includes a connection screw portion 31b formed by attaching a screw member to one end portion, and by screwing the connection screw portion 31b to a screw shaft portion provided at an end portion of the cylinder rods 13a and 15a. The cylinder rods 13a and 15a are connected to each other.

  A retaining member 33 for the connecting pin 32 is fixed to one side surface of the connecting tool 31 by a mounting screw 34. The retaining body 33 includes a retaining side portion 33 a that acts on the connecting pin 32 and a pair of rotation retaining side portions 33 b and 33 b that act on the connector 31. An oil lubrication hole 36 through which the grease nipple 35 provided in the head portion 32a of the connecting pin 32 is inserted is provided in the retaining side portion 33a. The grease nipple 35 is configured to supply grease from the oil supply passage 37 between the connection pin 32 and the swing operation arm 12 by injecting grease into the oil supply passage 37 provided inside the connection pin 32. It is.

  That is, the retaining member 33 is fixed to the connector 31 by one mounting screw 34. However, when the pair of rotation side portions 33 b and 33 b are engaged with the upper and lower sides of the connection arm portion 31 a of the connector 31, the retaining body 33 rotates around the attachment screw 34 with respect to the connector 31. Is configured to be prevented. The retaining member 33 allows the connecting pin 32 to be removed by allowing the retaining side portion 33 a to abut the head portion 32 a of the connecting pin 32 while allowing the connecting pin 32 to rotate with respect to the swing operation arm 12 and the connector 31. It is configured to stop.

  As shown in FIGS. 2, 3, and 10, each of the eight grounding wheels 23, 24 is a pair of left and right cores provided on core bars 30 embedded in a plurality of locations in the longitudinal direction of the crawler belt 26. A pair of left and right ring bodies 23a, 23a, 24a, 24a that support and act on the inner peripheral surface of the crawler belt 26 are provided separately on both lateral outer sides of the gold protrusions 30a, 30a. Each of the eight grounding wheels 23 and 24 is configured as a so-called outer wheel.

  In the following, a wheel pair consisting of the first and second two grounded wheels 23 and 23 from the front side of the traveling device among the eight grounded wheels 23 and 24 is referred to as a first wheel pair, and the first and second. The second two grounded wheels 23, 23 are referred to as the pair of front and rear grounded wheels 23, 23 in the first wheel pair, and the wheel pair consisting of the third and fourth two grounded wheels 23, 23 is the first. The second and second grounding wheels 23 and 23 are referred to as a pair of front and rear grounding wheels 23 and 23 in the second wheeling pair, and the fifth and sixth two grounding wheels. A pair of wheels 23 and 23 is referred to as a third wheel pair, and the fifth and sixth grounded wheels 23 and 23 are referred to as a pair of front and rear grounded wheels 23 and 23 in the third wheel pair. , The 7th and 8th grounded wheels 24, 24 are called the 4th wheeled pair, and the 7th and 8th grounded wheels. The 24 and 24 is referred to as a pair of ground track roller 24, 24 back and forth in the fourth rolling wheel pairs will be described.

  As shown in FIGS. 2 and 4, a crawler guide 40 is provided below the pair of front and rear grounding wheels 23 and 23 in each of the first to third wheel pairs, and the pair of front and rear ground rollers in the fourth wheel pair. A crawler guide 50 is provided below the rings 24 and 24.

  As shown in FIGS. 2, 3, and 4, the pair of front and rear grounding wheels 23, 23 in the first to third wheel pairs is rotatable around the swing axis P of the traveling device sideways on the track frame 20. The track frame 20 is supported by a single support 60 connected to the track frame 20 while rotating about the rotation axis X by contact with the inner peripheral surface of the crawler belt 26 and by a grounding reaction force applied to the crawler belt 26. On the other hand, the crawler belt 26 is supported while moving up and down around the swing axis P.

  A crawler guide 40 disposed below the pair of front and rear grounding wheels 23, 23 in the first to third wheel pairs is supported by the support 60 in a fixed state, and is a swing shaft with respect to the track frame 20. The crawler belt 26 is guided to rotate while maintaining the engaged state with the pair of front and rear grounding wheels 23 and 23 while swinging integrally with the pair of front and rear grounding wheels 23 and 23 around the core P.

  The pair of front and rear grounding wheels 24, 24 in the fourth wheel pair are supported by the track frame 20 so as to be rotatable only, and are rotated around the rotation axis Y by contact with the inner peripheral surface of the crawler belt 26. The crawler belt 26 is supported without being raised or lowered with respect to the frame 20.

  The crawler guide 50 arranged below the pair of front and rear grounding wheels 24, 24 in the fourth wheel pair is supported in a fixed state on the track frame 20, and the crawler belt 26 is supported by the pair of front and rear grounding wheels 24, 24. Guiding to rotate while maintaining the engaged state.

The support body 60 in the first to third wheel pairs will be described in detail.
As shown in FIGS. 12 and 13, the support body 60 includes a connecting boss portion 61 positioned in a lateral orientation of the traveling device at the center portion in the front-rear direction of the support body 60, and an oscillating shaft composed of an axis of the connecting boss portion 61. A support for connecting the pair of front and rear traveling boss support bosses 62 and 63 located on the front and rear sides of the core P and the connecting boss 61 and the pair of front and rear support bosses 62 and 63. And a body main body 64.

  The support body 64 includes a flat horizontal plate portion 65 positioned in a state where it is connected to the front and rear sides of the connection boss portion 61 over the outer peripheral surface of the connection boss portion 61 and the outer peripheral surfaces of the support boss portions 62 and 63, A vertical plate portion 66 is provided in a state of being connected to the outer peripheral surfaces of the connecting boss portion 61 and the front and rear support boss portions 62 and 63 across the lower side of the horizontal plate portion 65 and the lower side of the horizontal plate portion 65 on the rear side. ing. The upper end portion of the vertical plate portion 66 is connected to the lower surfaces of the front and rear horizontal plate portions 65. The front and rear horizontal plate portions 65 are arranged such that the upper surface is positioned above the traveling device with respect to the swing axis P and the lower surface is positioned below the traveling device with respect to the swing axis P. Reinforcing ribs 67 project from the upper surfaces of the front and rear horizontal plate portions 65.

  The connecting boss portion 61, the pair of front and rear support boss portions 62 and 63, the support body 64, and the front and rear reinforcing ribs 67 are integrally formed by casting. The support body 60 is made of a casting that is cast throughout.

  That is, as shown in FIGS. 3, 4, 8, and 9, the support body 60 is rocked to the track frame 20 via the connection shaft 80 by the connection boss portion 61 in a state of being located on the lateral outer side of the traveling device of the track frame 20. It is connected so as to be rotatable around the dynamic axis P. The support body 60 supports the front grounding wheel 23 by a front support boss portion 62 so as to be rotatable around a rotation axis Y via a support shaft 81, and the rear side support boss portion 63 supports a rear side ground rolling wheel. The wheel 23 is rotatably supported around the rotation axis Y via a support shaft 81.

The crawler guide 40 provided below the pair of front and rear ground contact wheels 23, 23 in the first to third wheel pairs will be described in detail.
As shown in FIGS. 12 and 14, the crawler guide 40 disposed below the pair of front and rear ground contact wheels 23, 23 in the first to third wheel pairs is formed in a bar shape that is long in the longitudinal direction of the traveling device, A crawler guide main body 41 configured to enter between a pair of left and right core metal protrusions 30a, 30a in the plurality of core bars 30, and a state in which the crawler guide main body 41 protrudes upward in the front and rear direction of the traveling device. And a connecting portion 42 provided. The crawler guide main body 41 includes a front connection portion 43 that protrudes upward from the traveling device at the front end portion 41a, and a rear connection portion 44 that protrudes upward from the crawler guide main body 41 at the rear end portion 41b. Reinforcing ribs 45 projecting upward from the traveling device are provided at portions of the crawler guide main body 41 located on the front and rear sides of the connecting portion 42. The front reinforcing rib 45 is provided in a state of being connected over the front end portion of the connecting portion 42 and the front end portion of the crawler guide main body 41. The rear reinforcing rib 45 is provided in a state of being connected over the rear end portion of the connecting portion 42 and the rear end portion 41 b of the crawler guide main body 41.

  The crawler guide main body 41, the connecting portion 42, the front connecting portion 43, the rear connecting portion 44, and the front and rear reinforcing ribs 45 are integrally formed by casting. The crawler guide 40 is made by casting, which is cast throughout.

  That is, as shown in FIGS. 8, 9, 11, and 12, the crawler guide 40 is a traveling device of a portion 64 </ b> A that is located between a pair of front and rear support boss portions 62 and 63 of the support body 64 in the support body 60. It is detachably connected to the lateral outer surface by a connecting portion 42. A front end portion 41 a of the crawler guide main body 41 is detachably connected to a connection seat portion 71 provided at the front end portion of the support body 60 by a front connection portion 43. The rear end portion 41 b of the crawler guide main body 41 is detachably connected to a connection seat portion 72 provided at the rear end portion of the support body 60 by the rear connection portion 44.

  As shown in FIGS. 10 and 11, the portion 64 </ b> A of the support body 64 is arranged in the vertical plate portion 66. The portion 64A is provided in an arrangement in a state of being biased inward of the traveling device with respect to the center 23CL in the traveling device lateral direction of the grounding wheel 23 supported by the support body 60.

  In a state in which the connecting portion 42 of the crawler guide 40 is connected to the portion 64A of the support body 64, the traveling device is provided with a stepped portion formed on the side portion of the connecting portion 42 inside the traveling device. The contact portion 42a is configured to come into contact with the lower end portion 64t of the portion 64A from below. That is, the support body 60 firmly supports the crawler guide 40 against the ground reaction force by receiving and supporting the lower end portion 64t with respect to the contact portion 42a.

  A pair of front and rear traveling device laterally and female screwed bolt holes 64b and 64b are provided in the portion 64A of the support body 64, and the connecting portion 42 of the crawler guide 40 is a pair of front and rear bolt holes 42b provided in the connecting portion 42. , 42b are inserted into the bolt hole 64b of the support body 64 and fastened to the portion 64A of the support body 64 by a pair of front and rear traveling bolts 85, 85 in a lateral orientation.

  The pair of bolt holes 64b and 64b of the support body 64 are arranged so that the fastened connecting bolt 85 is located below the swinging shaft core P of the support body 60. Further, the pair of bolt holes 64b and 64b of the support body 64 are positioned below the traveling device with respect to the rotation axis X of the grounded rolling wheel 23 in which the fastened connection bolt 85 is supported by the support body 60. It is arranged to become. Further, the pair of bolt holes 64 b and 64 b of the support body 64 are positioned between the rotation axis X of the pair of front and rear grounding wheels 23 and 23 where the fastened connection bolt 85 is supported by the support body 60. It is arranged to be in a state. Further, the pair of bolt holes 64b and 64b of the support body 64 are displaced at the outer peripheral side with respect to the pair of front and rear grounding wheels 23 and 23 supported by the support body 60. It arrange | positions so that it may be in the state located in.

  The front coupling seat 71 of the support 60 is provided on the outer peripheral surface of the front support boss 62 by integral casting with the support boss 62. A bolt hole 71 b with a female screw is provided in the front connection seat portion 71, and a bolt hole 43 b is provided in the front connection portion 43 of the crawler guide main body 41. By fastening the connecting bolt 86 through which the bolt hole 43b is inserted into the bolt hole 71b, the front connecting portion 43 is fastened and connected to the guide connecting seat surface 71a in the connecting seat portion 71. As a result, the front end portion 41a of the crawler guide main body 41 is detachably coupled to the coupling seat portion 71. The bolt hole 71b of the connecting seat portion 71 is provided with a posture set so that the connecting bolt 86 is fastened from the front outer side of the support boss portion 62 in the traveling device front-rear posture.

  The rear connection seat 72 of the support 60 is provided on the outer peripheral surface of the rear support boss 63 by integral casting with the support boss 63. A bolt hole 72b with a female screw is provided in the rear connecting seat portion 72, and a bolt hole 44b is provided in the rear connecting portion 44 of the crawler guide main body 41. By fastening the connecting bolt 86 through which the bolt hole 44b is inserted into the bolt hole 72b, the rear connecting portion 44 is fastened and connected to the guide connecting seat surface 72a in the connecting seat portion 72. Accordingly, the rear end portion 41b of the crawler guide main body 41 is detachably coupled to the coupling seat portion 72. The bolt hole 72b of the connecting seat portion 72 is provided in a posture set so that the connecting bolt 86 is fastened in the posture in the front-rear direction of the traveling device from the rear outer side of the support boss portion 63.

  An oil lubrication seat 73 is provided in a portion of the outer peripheral surface of the front and rear support bosses 62 and 63 of the support 60 that is located above the connecting seats 71 and 72 above the traveling device. An oil supply port 74 for supplying grease between the support boss portions 62 and 63 and the support shaft 81 is formed in the oil supply seat portion 73 in the front and rear support boss portions 62 and 63, and the oil supply seat in the front and rear support boss portions 62 and 63 is formed. A grease nipple 75 for supplying grease to the oil supply port 74 is mounted on a nipple mounting seat surface 73 a provided in the portion 73.

  The lubrication port 74 formed in the lubrication seat portion 73 in the front and rear support boss portions 62 is formed so as to be positioned above the traveling device with respect to the rotation axis X of the grounding wheel 23 supported by the support boss portions 62 and 63. It is. The lubrication port 74 formed in the lubrication seat portion 73 in the front support boss portion 62 is formed so as to be located above the front end portion 41 a of the crawler guide main body 41 coupled to the coupling seat portion 71. The oil supply port 74 formed in the oil supply seat 73 in the rear support boss 63 is formed so as to be positioned above the rear end portion 41 b of the crawler guide main body 41 connected to the connection seat 72. is there.

  FIG. 15 is a front view showing the connecting seat 71 and the oiling seat 73 provided on the front support boss 62. The connecting seat 72 and the lubricating seat 73 provided on the rear support boss 63 have the same configuration as the connecting seat 71 and the lubricating seat 73 provided on the front supporting boss 62. A front view of the connecting seat 72 and the lubrication seat 73 provided on the support boss 63 is omitted. As shown in FIGS. 13 and 15, the lubricating seat 73 and the connecting seats 71 and 72 provided on the front and rear support bosses 62 and 63 are connected to the nipple mounting seat surface 73 a in the lubricating seat 73 and the connecting seat. The guide connecting seat surfaces 71a and 72a in the portions 71 and 72 are provided so as to be flush with each other.

  The crawler guide 50 provided below the pair of front and rear grounding wheels 24, 24 in the fourth wheel pair will be described in detail.

  As shown in FIGS. 4, 16, and 17, the crawler guide 50 disposed below the pair of front and rear grounding wheels 24, 24 in the fourth wheel pair is a bar-shaped crawler guide body that is long in the front-rear direction of the traveling device. 51, a front connecting portion 52 provided in a state of projecting upward of the traveling device at the front end portion of the crawler guide main body 51, and a state of being provided in a state of projecting upward of the traveling device on the rear end side of the crawler guide main body 51. And a connecting portion 53. The crawler guide main body 51, the front connecting portion 52, and the rear connecting portion 53 are integrally formed by casting.

  The crawler guide 50 is in a state where the front end of the crawler guide main body 51 is located between the sixth grounding wheel 23 and the seventh grounding wheel 24 and the rear end is located at the same front-rear position as the eighth grounding wheel 24. Thus, it is detachably connected to the track frame 20.

  That is, the front connection portion 52 is connected to the front support portion 55 formed by attaching a block body to a portion of the track frame 20 between the sixth grounding wheel 23 and the seventh grounding wheel 24. The bolt 58 is tightened and connected. The rear connecting portion 53 is formed by attaching a block body to a portion of the track frame 20 between the seventh grounding wheel 24 and the eighth grounding wheel 24. The rear support portion 56 has three connecting bolts 59. It is connected by tightening.

  FIG. 18 is a side view showing the cancel link 14 in a state of approaching the front support portion 55. FIG. 19 is a perspective view showing the front support portion 55. As shown in FIGS. 18 and 19, the front support portion 55 is approached to a location where the bolt hole 55 b for the connecting bolt 58 in the front support portion 55 is located on the base end side of the front support portion 55. A cutout portion 55a into which the end of the cancel link 14 on the track frame side enters is provided.

  FIG. 20 is a cross-sectional view showing an oil supply structure at a connecting portion between the cancel link 14 and the track frame 20. As shown in FIGS. 20 and 21, the oil supply structure at the portion where the cancel link 14 and the track frame 20 are connected has a connecting shaft 90 that connects the bifurcated portion 14 a of the cancel link 14 and the boss portion 20 a of the track frame 20. Of the outer peripheral surface of the connecting shaft 90, the annular oil groove 91 provided over the entire circumference of the connecting shaft 90 at a location facing the shaft hole of each bifurcated portion 14a, and concentric with the axis of the connecting shaft 90 inside the connecting shaft 90. An oil supply passage 92 provided, and a communication passage 93 provided in the radial direction of the connection shaft 90 inside the connection shaft 90 in a state where the oil supply passage 92 is communicated with each annular oil supply groove 91 are provided. The communication passages 93 for communicating the oil supply passages 92 with the respective annular oil supply grooves 91 are provided at two locations in the circumferential direction of the connecting shaft 90.

  As shown in FIGS. 20 and 22, the oil supply structure at the portion where the cancel link 14 and the track frame 20 are connected includes a grease reservoir 94 provided between the connecting shaft 90 and the boss portion 20 a, and the grease reservoir 94. A communication passage 95 provided in the radial direction of the connecting shaft 90 is provided inside the connecting shaft 90 in a state where the oil supply passage 92 is communicated.

  That is, when grease is injected from the grease nipple 96 mounted on the end surface of the connecting shaft 90 on the lateral side of the traveling device, the injected grease flows into the oil supply passage 92 and flows into the communication passages 93 and 95 from the oil supply passage 92. . The grease that has flowed into the communication passage 93 flows into the annular oil supply groove 91 and enters between the connecting shaft 90 and the bifurcated portion 14 a from the annular oil supply groove 91. The grease that has flowed into the communication path 95 flows into the grease reservoir 94 and enters between the bush 97, the connecting shaft 90, and the boss portion 20 a from the grease reservoir 94.

[Another embodiment]
FIG. 23 is a side view showing a support structure of the crawler guide 40 having another embodiment.
As shown in FIG. 23, in the support structure of the crawler guide 40 provided with another embodiment, a pair of traveling device laterally connecting bolts that connect the connecting portion 42 of the crawler guide 40 to the support body 64 of the support 60. The front connection bolt 85 of 85, 85 overlaps the grounding wheel 23 in a side view of the traveling device with respect to the front grounding wheel 23 supported by the support 60, and the rear of the pair of connection bolts 85, 85. A configuration is adopted in which the connecting bolt 85 on the side is provided with the connecting bolt 85 in an arrangement in which the connecting bolt 85 on the side overlaps the grounding wheel 23 in a side view of the traveling device with respect to the grounding wheel 23 on the rear side.

[Another Example]
(1) In the above-described embodiment, eight grounding rollers 23 and 24 are provided, and two of the six grounding wheels 23 out of the eight grounding wheels 23 and 24 are track frames via the support 60. 20 shows an example in which it is supported so as to be swingable. However, a plurality of contact rollers 23 and 24, which are more or less than eight, are provided, and some of the plurality of contact rollers 23 and 24 are provided. Two of them may be swingably supported on the track frame 20 via the support 60.

(2) In the above-described embodiment, the crawler guide main body 41 is configured to be detachably connected to the support 60 at the intermediate portion and both ends in the front-rear direction. It is connected to the support body 60 and is not connected to the support body 60 at both ends in the front-rear direction, or connected to the support body 60 at an intermediate part in the front-rear direction, and either the front end part or the rear end part You may implement by employ | adopting the structure connected with the support body 60. FIG.

(3) In the above-described embodiment, an example in which the crawler guide 40 in which the crawler guide main body 41 and the coupling portion 42 are integrally formed is shown. However, after the crawler guide main body 41 and the coupling portion 42 are separately formed, welding or the like is performed. A crawler guide configured to be connected by the above may be employed.

(4) In the above-described embodiment, the example in which the track frame 20 is configured to be supported by the body frame 3 so as to be movable up and down via the pair of swingable support arms 10 and 10 is shown. You may implement by employ | adopting the structure with which the flame | frame 20 was connected with the body frame 3 so that raising / lowering was impossible.

(1) The present invention is equipped with a normal combine having a threshing device that is put into a handling room together with a head side in addition to a combine equipped with a self-deforming threshing device. It can be used for a crawler traveling device.

(2) The present invention can be used for a crawler traveling device installed in a harvester that harvests crops other than cereal grains such as onions and carrots, or a work vehicle other than a harvester such as a transporter, in addition to a combine. .

20 Track frame 23 Grounding wheel 23CL Center 40 Crawler guide 41 Crawler guide body 41a End (front)
41b End (rear)
42 connection part 42a per part 60 support body 61 connection boss part 62 support boss part (front side)
63 Support boss (rear side)
64 Support body 64A Site 71 Connection seat (front side)
71a Guide connection seat surface 72 Connection seat (rear side)
72a Guide connecting seat surface 73 Lubricating seat portion 73a Nipple mounting seat surface 74 Lubricating port 75 Grease nipple 85 Connecting bolt 86 Connecting bolt P Swing shaft core X Rotating shaft core

Claims (12)

A support body that is swingably supported by a track frame about a swing shaft core that is lateral to the traveling device, and a pair of front and rear that is supported by the support body and swingable about the swing shaft core with respect to the track frame. And a crawler guide that is supported by the support and is swingable integrally with the pair of front and rear grounding wheels around the pivot axis with respect to the track frame,
A connecting boss portion that is rotatably connected to the track frame, and a pair of front and rear grounding wheels that are separately located on the front and rear sides of the traveling device with respect to the pivot shaft. A pair of front and rear support boss portions that are rotatably supported, and a support body that connects the connection boss portion and the pair of front and rear support boss portions;
The crawler guide includes a crawler guide main body, and a connecting portion that protrudes upward from the crawler guide main body and is connected to the support main body.
A crawler traveling device in which the connecting portion is detachably coupled to a traveling device lateral outer surface of the support body.   The crawler traveling device according to claim 1, wherein a portion of the support body to which the connecting portion is coupled is biased to the traveling device lateral inner side with respect to the center of the grounding wheel in the traveling device lateral direction. .   The crawler traveling device according to claim 1 or 2, wherein a contact portion that abuts from below on a portion of the support body that is connected to the connecting portion is provided in the connecting portion.   The connection seat part which can connect the edge part of the front-back direction of the said crawler guide main body so that attachment or detachment is possible is provided in each of the outer peripheral surface of the said front-back pair of said support boss | hub part. Crawler travel device. A connecting bolt for detachably connecting an end portion of the crawler guide body in the front-rear direction to the connecting seat portion;
The connection seat portion provided on the support boss portion on the front side is configured such that the connection bolt is fastened from the front outer side of the support boss portion in a traveling device front and rear orientation.
5. The crawler according to claim 4, wherein the connection seat portion provided on the support boss portion on the rear side is configured such that the connection bolt is fastened from the rear outer side of the support boss portion in a traveling device front-back orientation. Traveling device.   An oil supply port for supplying grease to the support boss portion is provided in a portion of the outer peripheral surface of the pair of front and rear support boss portions, which is located above the end of the crawler guide body in the front-rear direction. The crawler traveling device according to 4 or 5.   The crawler traveling device according to claim 6, wherein the oil filling port is positioned above the traveling device with respect to a rotation axis of the grounded wheel. Provided on each of the outer peripheral surfaces of the pair of front and rear support bosses is an oiling seat part that forms an oil supply port for supplying grease to the support boss part,
A nipple mounting seat surface on which the grease nipple of the oil supply seat portion is mounted and a guide connection seat surface on which the front and rear ends of the crawler guide body of the connection seat portion are connected are formed flush with each other. The crawler traveling device according to any one of claims 4 to 7. A travel device laterally connecting bolt that connects the connecting portion to the support body,
The crawler traveling device according to any one of claims 1 to 8, wherein the connecting bolt is located between a rotation shaft core of the pair of front and rear grounding wheels. A travel device laterally connecting bolt that connects the connecting portion to the support body,
The crawler traveling device according to any one of claims 1 to 9, wherein the connecting bolt is positioned below the traveling device with respect to the pivot shaft.   The crawler traveling device according to claim 9 or 10, wherein the connecting bolt is positioned below the traveling device with respect to a rotational axis of the pair of front and rear ground wheels.   The crawler traveling device according to any one of claims 9 to 11, wherein the connecting bolt is located at a position shifted to the outer peripheral side with respect to the pair of front and rear grounding wheels in a side view of the traveling device.

Images