JP2012184005A - Crawler tension adjustment device of crawler traveling device - Google Patents

Abstract

A crawler tension adjusting device for a suitable crawler traveling device is provided.
A tension ring 27 and an end grounding wheel 26 located on the most end side in the front-rear direction among a plurality of grounding wheels 24, 25, 26 are arranged in a state of overlapping in a side view, The end of the guide member 52 on the side of the tensioning wheel is supported by the track frame 22 at a position farther from the tensioning wheel 27 than the end grounding roller 26 in the front-rear direction. The opposite end is supported by the track frame 22 independently of the end of the guide member 52 on the tension ring 27 side.
[Selection] Figure 4

Description

  The present invention is supported by a plurality of grounded wheels rotatably provided on one lateral side of the track frame, and supported on the lateral one side of the track frame along the front-rear direction of the track frame. A guide member, a tension adjustment frame supported by the guide member in a slidable manner along the front-rear direction, and an end portion of the crawler belt in the front-rear direction supported rotatably by the tension adjustment frame. The present invention relates to a crawler tension adjusting device for a crawler traveling device provided with a tension ring that supports the tensioning mechanism and a tension adjusting mechanism that adjusts sliding of the tension adjusting frame with respect to the guide member.

As the above-described crawler tension adjusting device, the one described in Patent Document 1 was first developed.
The crawler tension adjusting device described in Patent Document 1 includes a bracket that is slidably inserted back and forth at the rear end of a track frame, and a tension ring that is pivotally supported by the bracket.
The tension wheel adjusts the tension of the crawler belt by moving the bracket by screw feed by rotating the operation shaft.

  In the crawler tension adjusting device described in Patent Document 1, a crawler belt is provided with a support shaft that extends laterally from the bracket, and the tension wheel is supported on the extended end side of the support shaft. Is placed on one side of the track frame where the rolling wheels for grounding are located.

JP-A-2005-335614 (paragraph [0019], FIG. 3)

  An object of the present invention is to provide a crawler tension adjusting device for a suitable crawler traveling device.

The feature of the present invention is that
A plurality of grounded wheels rotatably provided on one side of the track frame;
A guide member supported on the lateral side of the track frame in a state along the front-rear direction of the track frame;
A tension adjusting frame supported by the guide member in a slidable state along the front-rear direction;
A tension ring that is rotatably supported by the tension adjustment frame and that supports the crawler belt at the extreme end in the front-rear direction;
A tension adjusting mechanism for adjusting the sliding of the tension adjusting frame with respect to the guide member, and
The tension ring and the end grounding wheel located on the most end side in the front-rear direction among the plurality of grounding wheels are arranged in a state of overlapping in a side view,
An end of the guide member on the side of the tensioning wheel is supported by the track frame at a position farther from the tensioning wheel than the end contact ground wheel in the front-rear direction.
An end portion of the guide member opposite to the tension ring is supported by the track frame independently of an end portion of the guide member on the tension ring side.

  Furthermore, in the present invention, a guide mounting portion supported on the one lateral side of the track frame, and a crawler guide supported by the guide mounting portion and acting to prevent the crawler belt from coming off, the guide guide is provided. It is preferable that an end portion on the tension ring side of the member is supported by an intermediate member connected to the guide attachment portion.

  Furthermore, in the present invention, it is preferable that the mediating member supports an end portion on the tension ring side of the guide member from below.

  Further, in the present invention, the end of the guide member on the tensioning wheel side is adjacent to the end grounding wheel and the adjacent grounding wheel adjacent to the end grounding wheel. It is preferable to be supported at a position between the ring.

  Further, in the present invention, an end portion of the guide member opposite to the tension wheel is at a position far from an adjacent grounded wheel adjacent to the end grounded wheel of the plurality of grounded wheels. It is preferable that the track frame is supported.

  Furthermore, in the present invention, it is preferable that an end portion of the guide member opposite to the tension ring is supported by a support arm connected to the track frame.

  Furthermore, in the present invention, it is preferable that the support arm supports an end portion of the guide member opposite to the tension ring from below.

  Furthermore, in the present invention, it is preferable that the support arm is connected to the one lateral side of the track frame.

  Further, in the present invention, in the vertical direction, the support arm is located at a position lower than the end of the guide member on the tension ring side, and the end of the guide member opposite to the tension ring. Is preferably supported.

  Furthermore, in the present invention, a guide mounting portion supported on the one lateral side of the track frame, and a crawler guide supported by the guide mounting portion and acting to prevent the crawler belt from coming off, the guide guide is provided. Preferably, the member is supported on the track frame by an intermediate member connected to the guide mounting portion, a support arm connected to the track frame, and a second support arm connected to the track frame. It is.

  In the present invention, it is preferable that the second support arm supports the guide member from the side.

In the present invention, it is preferable that the second support arm supports the guide member at a position between the mediation member and the support arm.
In the present invention, it is preferable that the second support arm is connected to the upper surface of the track frame.
Furthermore, in the present invention, a guide mounting portion supported on the one lateral side of the track frame, and a crawler guide supported by the guide mounting portion and acting to prevent the crawler belt from coming off, the guide guide is provided. It is preferable that an end portion on the tension ring side of the member is supported by an intermediate member connected to the guide attachment portion, and the intermediate member slidably supports the tension adjustment frame.
Further, in the present invention, a guide mounting portion supported on the one lateral side of the track frame, a crawler guide supported by the guide mounting portion and acting to prevent the crawler belt from coming off, and one end of the guide mounting portion The guide member is formed in a cross-sectional shape opened downward at least at the end on the tension ring side, and the other end of the mediation member is connected to the guide member. The tension member-side end portion of the guide member is connected to the end portion of the tension ring side, and constitutes the bottom portion of the tension ring-side end portion of the guide member. It is preferable to support it.
Furthermore, in the present invention, it is preferable that the mediating member extends to the tension ring side from an end of the guide member on the tension ring side.

Side view of work equipment Side view of crawler traveling device Top view of crawler traveling device Side view of the crawler traveling device rear Longitudinal plan view of crawler tension adjusting device Longitudinal side view of crawler tension adjusting device Plan view of claw guide mounting structure Perspective view of claw guide mounting part and mediating member Plan view of the ring body support Side view of ring support

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of a working machine provided with a crawler tension adjusting device A according to an embodiment of the present invention. As shown in this figure, this working machine is configured to be self-propelled by a pair of left and right crawler traveling devices 1, 1 and has a driving unit equipped with a driver seat 2, and this traveling machine body A cutting unit 10 connected to the front part of the machine body frame 3, and a threshing device 4 and a grain tank 5 provided side by side in the machine body lateral direction on the rear side of the machine body frame 3.

This machine harvests rice and wheat.
That is, the cutting unit 10 includes a cutting unit frame 11 that is connected to the front portion of the machine body frame 3 so as to be swingable up and down, and the cutting unit frame 11 is swung up and down by the hydraulic cylinder 12. The weeding tool 13 located side by side in the horizontal direction of the body at the front end of the mowing unit 10 moves up and down into a descending work state in which the weeding tool 13 is lowered near the ground, and an ascending non-working state in which the weeding tool 13 is elevated from the ground.

  When the traveling machine body travels with the mowing unit 10 in the descending work state, the mowing part 10 is a part of the plurality of pulling devices 14 in which the planted cereals to be harvested are arranged in the lateral direction of the machine body by the weeding tools 13. Introduced into the pulling device 14 corresponding to the grass tool 13 to cause the pulling processing, the planted cereals that are raised and processed by the pulling device 14 are cut by the clipper-shaped cutting device 15, and the cutting device is cut. 15 is fed by the feeding device 16 to the start end of the threshing feed chain 4a of the threshing device 4.

  The threshing device 4 nips and conveys the stock side of the harvested cereal rice cake in the rearward direction of the machine body by the threshing feed chain 4a, and supplies the tip side of the harvested cereal rice cake to the handling room (not shown) for threshing treatment. The grain tank 5 collects and stores the threshed grains conveyed from the threshing device 4.

  FIG. 2 is a side view of the crawler traveling device 1 on the left side. FIG. 3 is a plan view of the crawler traveling device 1 on the left side. The crawler traveling device 1 on the right side has the same configuration as the crawler traveling device 1 on the left side, and illustration of the crawler traveling device 1 on the right side is omitted. As shown in these drawings, the crawler traveling device 1 includes a track frame 22 connected to the body frame 3 via a pair of front and rear support arms 20, 21, and a transmission case ( And a crawler drive wheel 23 that can be driven and rotated supported by the body frame 3 via a track frame 22 and a track frame 22 arranged side by side in the lateral direction of the track frame 22 that is located laterally outside the traveling body. Eight free grounding wheels 24, 25, 26 supported on the frame 22, and the grounding wheel located on the rearmost end side of the track frame among the eight grounding wheels 24, 25, 26. 26 (corresponding to the “end grounding wheel” of the present invention), a tension ring 27 provided at the rear end of the track frame 22 at the rear upper side, and the track frame 2 And a pair of freely rotatable carrier rollers 28 and 28 supported by the body frame 3 above the crawler driving wheel 23, the eight grounding rollers 24, 25 and 26, and the tension wheel 27. And a crawler belt 29 made of rubber wound around the pair of front and rear carrier rollers 28, 28.

The front support arm 20 includes a rotation support shaft 20a that rotatably connects the base portion of the support arm 20 to the body frame 3, and a side of the rotation support shaft 20a to which the support arm 20 is connected. It is interlocked with the cylinder rod 31a of the hydraulic cylinder 31 via an interlocking arm 30 that is provided at the opposite end so as to be integrally rotatable.
That is, the front support arm 20 is swung up and down with respect to the body frame 3 around the axis of the rotation support shaft 20a by the hydraulic cylinder 31, and the front end side of the track frame 22 is moved with respect to the body frame 3. Move up and down.

The support arm 21 on the rear side includes a rotation support shaft 21a that rotatably connects a base portion of the support arm 21 to the body frame 3, and a side to which the support arm 21 of the rotation support shaft 21a is connected. Is interlocked with the cylinder rod 33a of the hydraulic cylinder 33 through an interlocking arm 32 provided at the opposite end so as to be rotatable together. The free end side of the rear support arm 21 is connected to the rear end side of the track frame 22 via a cancel link 34.
That is, the rear support arm 21 is swung up and down with respect to the machine body frame 3 around the axis of the rotation support shaft 21 a by the hydraulic cylinder 33, and the rear end of the track frame 22 through the cancel link 34. The side is moved up and down with respect to the body frame 3.

That is, when the pair of front and rear support arms 20 and 21 in the left and right crawler traveling devices 1 and 1 are operated to swing, the traveling machine body is inclined in the lateral direction and the front and rear direction with respect to the ground.
That is, the pair of front and rear support arms 20 and 21 in one of the left and right crawler traveling devices 1 are both raised or lowered, and the lift and lower strokes of the pair of front and rear support arms 20 and 21 are the same. The track frame 22 in one of the left and right crawler traveling devices 1 is raised or lowered in parallel to the body frame 3, and one end in the lateral direction of the traveling body is crawler traveling on the other end side. The grounding point by the apparatus 1 is moved up and down with respect to the ground using the swinging fulcrum.

  Ascending or descending stroke of the support arms 20 and 21 in the left and right crawler traveling devices 1 so that one of the front support arm 20 and the rear support arm 21 in the left and right crawler traveling devices 1 swings up or down. Or the track frame 22 in the left and right crawler traveling devices 1 swings up and down with respect to the body frame 3 with the ground contact point on the front end side as a swing fulcrum. Alternatively, it swings up and down with respect to the body frame 3 with the grounding point on the rear end side as a swing fulcrum, and one end in the front-rear direction of the traveling body moves up and down with respect to the ground with the other end as a swing fulcrum. .

  Next, of the eight grounding wheels 24, 25, 26, the grounding wheel 26 positioned closest to the rear end side of the track frame is referred to as the last grounding wheel 26, and the eight grounding wheels 24, 25 26, a grounding wheel 25 positioned adjacent to the last grounding wheel 26 in front of the last grounding wheel 26 is a rear grounding wheel 25 (corresponding to “adjacent grounding wheel” of the present invention). Will be described.

  The rear grounding wheel 25 and the last grounding wheel 26 are supported by the track frame 22 so as to be freely rotatable, and cannot be moved up and down with respect to the track frame 22.

  Of the eight grounding wheels 24, 25, 26, the grounding wheel 24 except the last grounding wheel 26 and the rear grounding wheel 25 is composed of two adjacent grounding wheels 24, 24. The two grounded wheels 24, 24 of each wheeling group are grouped so as to form one wheeling group, and are supported by the track frame 22 in a state of being connected to the track frame 22 by one balance connecting member 40. Has been.

  As shown in FIGS. 3 and 4, each of the balance connecting members 40 described above is rotatably supported by the track frame 22 via a connecting shaft 41 positioned at an intermediate portion thereof. One grounding wheel 24 of the two grounding wheels 24, 24 forming each wheel group is freely rotatable to a portion located on the front end side of the connecting shaft 41 of the balance connecting member 40. The other grounding wheel 24 is supported on a portion of the balance connecting member 40 located on the rear end side of the connecting shaft 41 so as to be freely rotatable.

  Thus, among the eight grounding wheels 24, 25, 26, the grounding wheels 24 excluding the last grounding wheel 26 and the rear grounding wheel 25, and forming each of the above-described wheeling groups. The two grounding wheels 24, 24 are attached to the track frame 22 by a balance connecting member 40. When the balance connecting member 40 swings, the track frame has the axis of the connecting shaft 41 as a swing fulcrum. It moves up and down against 22.

  The crawler traveling device 1 includes a crawler guide 42 provided corresponding to each of the above-described roller group, and a crawler guide 43 provided corresponding to the rear grounding wheel 25 and the last grounding wheel 26. .

  As shown in FIG. 2 and FIG. 4, the crawler guides 42 corresponding to the respective roller groups are arranged between a pair of left and right guide wheel bodies of one grounded roller 24 of the wheel group and the other ground roller. A rod-shaped guide body 42a positioned between a pair of left and right guide wheel bodies of the wheel 24, and a connecting rod 42b for connecting the guide body 42a to the balance connecting member 40; The guide main body 42a engages the left and right core metal projections 29a, 29a of the crawler belt 29 to prevent the crawler belt 29 from coming off. The crawler guide 42 corresponding to each wheel group is produced by integrally casting the guide body 42a and the connecting rod 42b together with the balance connecting member 40.

  As shown in FIG. 4, the crawler guide 43 corresponding to the last grounding wheel 26 and the rear grounding wheel 25 is between the left and right guide wheel bodies of the rear grounding wheel 25 and the last grounding wheel. 26, a rod-shaped guide main body 43a located between a pair of left and right guide wheel bodies, and a connecting rod 43b for connecting the guide main body 43a to a guide mounting portion 44 provided in the track frame 22. The guide main body 43a engages the left and right core metal projections 29a of the crawler belt 29 to prevent the crawler belt 29 from coming off. The crawler guide 43 is manufactured by integrally casting the guide main body 43a and the connecting rod 43b.

  The guide mounting portion 44 of the track frame 22 is configured by attaching a metal block to the lateral side surface of the track frame 22. The guide attachment portion 44 has three connection bolts 45 arranged on the end of the guide attachment portion 44 in a triangular arrangement in the vertical direction and the front-rear direction of the track frame 22, thereby connecting the crawler guide 43. 43b is supported.

  The crawler traveling device 1 includes a crawler tension adjusting device A according to an embodiment of the present invention provided at the rear portion of the track frame 22.

  FIG. 3 shows the structure of the crawler tension adjusting device A according to this embodiment in plan view. FIG. 4 shows the structure of the crawler tension adjusting device A according to this embodiment in a side view. FIG. 5 is a longitudinal plan view of the crawler tension adjusting device A according to the present embodiment. FIG. 6 is a longitudinal side view of the crawler tension adjusting device A according to the present embodiment. As shown in these drawings, the crawler tension adjusting device A according to the present embodiment includes the tension ring 27, a tension adjustment frame 51 that supports the tension ring 27 by a ring body support portion 50, and a tension adjustment frame 51. A guide member 52 that supports the tension adjustment frame 51; a tension adjustment shaft 55 that is attached across a locking portion 53a that protrudes from a lateral side portion of the ring body support portion 50; and a support portion 54 that is provided on the guide member 52; It is configured with.

  The tension adjusting frame 51 includes the ring body support portion 50 and a frame main body 51 a made of a square steel pipe having one end connected to the base of the ring body support portion 50.

  FIG. 9 is a plan view of the ring body support portion 50. FIG. 10 is a side view of the ring body support portion 50. As shown in these drawings, the ring body support portion 50 has a bifurcated shaft support fork 56 provided with a pair of shaft support holes 56a and 56a arranged on both sides of the tension ring 27. It is configured with. As shown in FIG. 5, the ring body support portion 50 supports the support shaft 27 a of the tension ring 27 on both sides of the tension ring 27 by the shaft support fork 56. That is, the tension ring 27 is supported on both lateral sides.

  The guide member 52 is disposed on the same lateral side as the lateral side where the grounding wheels 24, 25, 26 of the track frame 22 are located, and a pair of front and rear support arms 22 a, 22 a of the track frame 22. The tension adjusting frame 51 is disposed at an appropriate position on one lateral side of the track frame 22, that is, at a position where the crawler belt 29 is appropriately wound around the tension ring 27. The front support arm 22a corresponds to the “support arm” of the present invention, and the rear support arm 22a corresponds to the “second support arm” of the present invention.

  As shown in FIGS. 6, 7, and 8, the end of the guide member 52 on the side where the tension adjusting frame 51 protrudes and the tension adjusting frame 51 are located above the guide mounting portion 44 of the track frame 22. It is received and supported from below by the support portion 44a via a mediating member 57 having a lower end placed on the support portion 44a formed of an end surface. The mediating member 57 includes an upper sheet metal member 57a whose one side receives and acts on the lower surfaces of the guide member 52 and the tension adjusting frame 51, and a lower sheet metal member interposed between the upper sheet metal member 57a and the support portion 44a. 57b.

  The tension adjusting frame 51 is slidably supported by the guide member 52 when the frame main body 51 a is slidably fitted in the guide member 52, and is slid by the inner surface of the guide member 52. It is guided and slides in the front-rear direction of the track frame 22. The tension adjusting frame 51 is slid in a state where it rises with respect to the track frame 22 as the tension ring 27 moves away from the guide member 52 by setting the sliding direction according to the mounting direction of the guide member 52. In other words, the tension adjustment frame 51 is located above the tension ring 27 of the crawler belt 29 and is located along the track frame 22, and the tension adjustment frame 51 is positioned below the tension ring 27 to be tracked. It slides along a direction close to the direction of the load applied to the tension ring 27 by the tension of the portion inclined to the frame 22.

  The tension adjustment shaft 55 is constituted by a screw shaft that is screwed into a female screw of an adjustment shaft insertion hole provided in the support portion 54 of the guide member 52. The tension adjusting frame 51 is slidably adjusted with respect to the guide member 52 by moving in the front-rear direction and pushing or pulling on the engaging portion 53 a of the ring body support portion 50. The tension adjusting shaft 55 is disposed on the opposite side of the tension adjusting frame 51 from the side on which the track frame 22 is located, and is not affected by the operation of the track frame 22 from the lateral outer side of the traveling machine body of the crawler traveling device 1. Can be operated.

  In short, the crawler tension adjusting device A adjusts the movement while adjusting the tension adjusting shaft 55 by sliding the tension adjusting frame 51 between the guide member 52 and the mediating member 57 by the tension adjusting shaft 55 being rotated. At this time, the tension adjustment frame 51 slides along a direction close to the direction of the load applied to the tension ring 27 due to the tension of the crawler belt 29, and the twist adjustment frame 51 and the guide member 52 are unlikely to be twisted. Slide in state. Then, the tension wheel 27 is moved and adjusted to the rear side with respect to the track frame 22 to press the crawler belt 29 to the rear side of the traveling device, thereby adjusting the tension force of the crawler belt 29 to the increasing side. Alternatively, the tension ring 27 is adjusted to move forward with respect to the track frame 22 to reduce the pressure on the crawler belt 29, thereby adjusting the tension of the crawler belt 29 to the decreasing side.

  As shown in FIGS. 9 and 10, the ring body support portion 50 includes the shaft support fork 56 and the locking portion 53 a, and a pair of upper and lower reinforcing ribs 58 provided on the outer peripheral side of the shaft support fork 56. 58 and a second locking portion 53b provided on the opposite side of the shaft fork 56 from the side where the locking portion 53a is located. The shaft support fork 56, the locking portion 53a, the reinforcing rib 58, and the second locking portion 53b are integrally cast by lost wax casting.

  The second locking portion 53b attaches the tension adjusting shaft 55 when the tension adjusting frame 51 is mounted on the crawler tension adjusting device A of the crawler traveling device 1 on the right side.

[Another Example]
The object of the present invention can also be achieved by adopting a configuration in which the tension adjusting frame 51 is slidably adjusted by a grease cylinder instead of the above-described embodiment. Accordingly, the tension adjusting shaft 55, the grease cylinder, and the like are collectively referred to as a tension adjusting mechanism 55.

22 Track frame 22a Support arm, second support arms 24, 25, 26 Multiple ground wheels 25 Rear ground wheels (adjacent ground wheels)
26 Last Grounding Roller (End Grounding Roller)
27 Tension Ring 29 Crawler Belt 43 Crawler Guide 44 Guide Mounting Portion 51 Tension Adjustment Frame 52 Guide Member 55 Tension Adjustment Mechanism 57 Intermediary Member

  The present invention is supported by a plurality of grounded wheels rotatably provided on one lateral side of the track frame, and supported on the lateral one side of the track frame along the front-rear direction of the track frame. A guide member, a tension adjustment frame supported by the guide member in a slidable manner along the front-rear direction, and an end portion of the crawler belt in the front-rear direction supported rotatably by the tension adjustment frame. The present invention relates to a crawler tension adjusting device for a crawler traveling device provided with a tension ring that supports the tensioning mechanism and a tension adjusting mechanism that adjusts sliding of the tension adjusting frame with respect to the guide member.

As the above-described crawler tension adjusting device, the one described in Patent Document 1 was first developed.
The crawler tension adjusting device described in Patent Document 1 includes a bracket that is slidably inserted back and forth at the rear end of a track frame, and a tension ring that is pivotally supported by the bracket.
The tension wheel adjusts the tension of the crawler belt by moving the bracket by screw feed by rotating the operation shaft.

  In the crawler tension adjusting device described in Patent Document 1, a crawler belt is provided with a support shaft that extends laterally from the bracket, and the tension wheel is supported on the extended end side of the support shaft. Is placed on one side of the track frame where the rolling wheels for grounding are located.

JP-A-2005-335614 (paragraph [0019], FIG. 3)

  An object of the present invention is to provide a crawler tension adjusting device for a suitable crawler traveling device.

The feature of the present invention is that
A plurality of grounded wheels rotatably provided on one side of the track frame;
A guide member supported on the lateral side of the track frame in a state along the front-rear direction of the track frame;
A tension adjusting frame supported by the guide member in a slidable state along the front-rear direction;
A tension ring that is rotatably supported by the tension adjustment frame and that supports the crawler belt at the extreme end in the front-rear direction;
A tension adjusting mechanism for adjusting the sliding of the tension adjusting frame with respect to the guide member, and
The tensioning wheel and the end grounding wheel located on the most end side in the front-rear direction among the plurality of grounding wheels are in a side view when the tension adjustment frame slides with respect to the guide member. Can be duplicated,
An end of the guide member on the side of the tensioning wheel is supported by the track frame at a position farther from the tensioning wheel than the end contact ground wheel in the front-rear direction.
An end portion of the guide member opposite to the tension ring is supported by the track frame independently of an end portion of the guide member on the tension ring side.

  Furthermore, in the present invention, a guide mounting portion supported on the one lateral side of the track frame, and a crawler guide supported by the guide mounting portion and acting to prevent the crawler belt from coming off, the guide guide is provided. It is preferable that an end portion on the tension ring side of the member is supported by an intermediate member connected to the guide attachment portion.

  Furthermore, in the present invention, it is preferable that the mediating member supports an end portion on the tension ring side of the guide member from below.

  Further, in the present invention, the end of the guide member on the tensioning wheel side is adjacent to the end grounding wheel and the adjacent grounding wheel adjacent to the end grounding wheel. It is preferable to be supported at a position between the ring.

Furthermore, in this invention, the edge part on the opposite side to the said tension | tensile_strength wheel of the said guide member is the said tension | tensile_strength rather than the adjacent grounding wheel adjacent to the said edge part grounding wheel among these grounding wheels. It is preferable that the track frame is supported at a position far from the wheel .

  Furthermore, in the present invention, it is preferable that an end portion of the guide member opposite to the tension ring is supported by a support arm connected to the track frame.

  Furthermore, in the present invention, it is preferable that the support arm supports an end portion of the guide member opposite to the tension ring from below.

  Furthermore, in the present invention, it is preferable that the support arm is connected to the one lateral side of the track frame.

  Further, in the present invention, in the vertical direction, the support arm is located at a position lower than the end of the guide member on the tension ring side, and the end of the guide member opposite to the tension ring. Is preferably supported.

  Furthermore, in the present invention, a guide mounting portion supported on the one lateral side of the track frame, and a crawler guide supported by the guide mounting portion and acting to prevent the crawler belt from coming off, the guide guide is provided. Preferably, the member is supported on the track frame by an intermediate member connected to the guide mounting portion, a support arm connected to the track frame, and a second support arm connected to the track frame. It is.

  In the present invention, it is preferable that the second support arm supports the guide member from the side.

In the present invention, it is preferable that the second support arm supports the guide member at a position between the mediation member and the support arm.
In the present invention, it is preferable that the second support arm is connected to the upper surface of the track frame.
Furthermore, in the present invention, a guide mounting portion supported on the one lateral side of the track frame, and a crawler guide supported by the guide mounting portion and acting to prevent the crawler belt from coming off, the guide guide is provided. It is preferable that an end portion on the tension ring side of the member is supported by an intermediate member connected to the guide attachment portion, and the intermediate member slidably supports the tension adjustment frame.
Further, in the present invention, a guide mounting portion supported on the one lateral side of the track frame, a crawler guide supported by the guide mounting portion and acting to prevent the crawler belt from coming off, and one end of the guide mounting portion The guide member is formed in a cross-sectional shape opened downward at least at the end on the tension ring side, and the other end of the mediation member is connected to the guide member. The tension member-side end portion of the guide member is connected to the end portion of the tension ring side, and constitutes the bottom portion of the tension ring-side end portion of the guide member. It is preferable to support it.
Furthermore, in the present invention, it is preferable that the mediating member extends to the tension ring side from an end of the guide member on the tension ring side.

Side view of work equipment Side view of crawler traveling device Top view of crawler traveling device Side view of the crawler traveling device rear Longitudinal plan view of crawler tension adjusting device Longitudinal side view of crawler tension adjusting device Plan view of claw guide mounting structure Perspective view of claw guide mounting part and mediating member Plan view of the ring body support Side view of ring support

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of a working machine provided with a crawler tension adjusting device A according to an embodiment of the present invention. As shown in this figure, this working machine is configured to be self-propelled by a pair of left and right crawler traveling devices 1, 1 and has a driving unit equipped with a driver seat 2, and this traveling machine body A cutting unit 10 connected to the front part of the machine body frame 3, and a threshing device 4 and a grain tank 5 provided side by side in the machine body lateral direction on the rear side of the machine body frame 3.

This machine harvests rice and wheat.
That is, the cutting unit 10 includes a cutting unit frame 11 that is connected to the front portion of the machine body frame 3 so as to be swingable up and down, and the cutting unit frame 11 is swung up and down by the hydraulic cylinder 12. The weeding tool 13 located side by side in the horizontal direction of the body at the front end of the mowing unit 10 moves up and down into a descending work state in which the weeding tool 13 is lowered near the ground, and an ascending non-working state in which the weeding tool 13 is elevated from the ground.

  When the traveling machine body travels with the mowing unit 10 in the descending work state, the mowing part 10 is a part of the plurality of pulling devices 14 in which the planted cereals to be harvested are arranged in the lateral direction of the machine body by the weeding tools 13. Introduced into the pulling device 14 corresponding to the grass tool 13 to cause the pulling processing, the planted cereals that are raised and processed by the pulling device 14 are cut by the clipper-shaped cutting device 15, and the cutting device is cut. 15 is fed by the feeding device 16 to the start end of the threshing feed chain 4a of the threshing device 4.

  The threshing device 4 nips and conveys the stock side of the harvested cereal rice cake in the rearward direction of the machine body by the threshing feed chain 4a, and supplies the tip side of the harvested cereal rice cake to the handling room (not shown) for threshing treatment. The grain tank 5 collects and stores the threshed grains conveyed from the threshing device 4.

  FIG. 2 is a side view of the crawler traveling device 1 on the left side. FIG. 3 is a plan view of the crawler traveling device 1 on the left side. The crawler traveling device 1 on the right side has the same configuration as the crawler traveling device 1 on the left side, and illustration of the crawler traveling device 1 on the right side is omitted. As shown in these drawings, the crawler traveling device 1 includes a track frame 22 connected to the body frame 3 via a pair of front and rear support arms 20, 21, and a transmission case ( And a crawler drive wheel 23 that can be driven and rotated supported by the body frame 3 via a track frame 22 and a track frame 22 arranged side by side in the lateral direction of the track frame 22 that is located laterally outside the traveling body. Eight free grounding wheels 24, 25, 26 supported on the frame 22, and the grounding wheel located on the rearmost end side of the track frame among the eight grounding wheels 24, 25, 26. 26 (corresponding to the “end grounding wheel” of the present invention), a tension ring 27 provided at the rear end of the track frame 22 at the rear upper side, and the track frame 2 And a pair of freely rotatable carrier rollers 28 and 28 supported by the body frame 3 above the crawler driving wheel 23, the eight grounding rollers 24, 25 and 26, and the tension wheel 27. And a crawler belt 29 made of rubber wound around the pair of front and rear carrier rollers 28, 28.

The front support arm 20 includes a rotation support shaft 20a that rotatably connects the base portion of the support arm 20 to the body frame 3, and a side of the rotation support shaft 20a to which the support arm 20 is connected. It is interlocked with the cylinder rod 31a of the hydraulic cylinder 31 via an interlocking arm 30 that is provided at the opposite end so as to be integrally rotatable.
That is, the front support arm 20 is swung up and down with respect to the body frame 3 around the axis of the rotation support shaft 20a by the hydraulic cylinder 31, and the front end side of the track frame 22 is moved with respect to the body frame 3. Move up and down.

The support arm 21 on the rear side includes a rotation support shaft 21a that rotatably connects a base portion of the support arm 21 to the body frame 3, and a side to which the support arm 21 of the rotation support shaft 21a is connected. Is interlocked with the cylinder rod 33a of the hydraulic cylinder 33 through an interlocking arm 32 provided at the opposite end so as to be rotatable together. The free end side of the rear support arm 21 is connected to the rear end side of the track frame 22 via a cancel link 34.
That is, the rear support arm 21 is swung up and down with respect to the machine body frame 3 around the axis of the rotation support shaft 21 a by the hydraulic cylinder 33, and the rear end of the track frame 22 through the cancel link 34. The side is moved up and down with respect to the body frame 3.

That is, when the pair of front and rear support arms 20 and 21 in the left and right crawler traveling devices 1 and 1 are operated to swing, the traveling machine body is inclined in the lateral direction and the front and rear direction with respect to the ground.
That is, the pair of front and rear support arms 20 and 21 in one of the left and right crawler traveling devices 1 are both raised or lowered, and the lift and lower strokes of the pair of front and rear support arms 20 and 21 are the same. The track frame 22 in one of the left and right crawler traveling devices 1 is raised or lowered in parallel to the body frame 3, and one end in the lateral direction of the traveling body is crawler traveling on the other end side. The grounding point by the apparatus 1 is moved up and down with respect to the ground using the swinging fulcrum.

  Ascending or descending stroke of the support arms 20 and 21 in the left and right crawler traveling devices 1 so that one of the front support arm 20 and the rear support arm 21 in the left and right crawler traveling devices 1 swings up or down. Or the track frame 22 in the left and right crawler traveling devices 1 swings up and down with respect to the body frame 3 with the ground contact point on the front end side as a swing fulcrum. Alternatively, it swings up and down with respect to the body frame 3 with the grounding point on the rear end side as a swing fulcrum, and one end in the front-rear direction of the traveling body moves up and down with respect to the ground with the other end as a swing fulcrum. .

  Next, of the eight grounding wheels 24, 25, 26, the grounding wheel 26 positioned closest to the rear end side of the track frame is referred to as the last grounding wheel 26, and the eight grounding wheels 24, 25 26, a grounding wheel 25 positioned adjacent to the last grounding wheel 26 in front of the last grounding wheel 26 is a rear grounding wheel 25 (corresponding to “adjacent grounding wheel” of the present invention). Will be described.

  The rear grounding wheel 25 and the last grounding wheel 26 are supported by the track frame 22 so as to be freely rotatable, and cannot be moved up and down with respect to the track frame 22.

  Of the eight grounding wheels 24, 25, 26, the grounding wheel 24 except the last grounding wheel 26 and the rear grounding wheel 25 is composed of two adjacent grounding wheels 24, 24. The two grounded wheels 24, 24 of each wheeling group are grouped so as to form one wheeling group, and are supported by the track frame 22 in a state of being connected to the track frame 22 by one balance connecting member 40. Has been.

  As shown in FIGS. 3 and 4, each of the balance connecting members 40 described above is rotatably supported by the track frame 22 via a connecting shaft 41 positioned at an intermediate portion thereof. One grounding wheel 24 of the two grounding wheels 24, 24 forming each wheel group is freely rotatable to a portion located on the front end side of the connecting shaft 41 of the balance connecting member 40. The other grounding wheel 24 is supported on a portion of the balance connecting member 40 located on the rear end side of the connecting shaft 41 so as to be freely rotatable.

  Thus, among the eight grounding wheels 24, 25, 26, the grounding wheels 24 excluding the last grounding wheel 26 and the rear grounding wheel 25, and forming each of the above-described wheeling groups. The two grounding wheels 24, 24 are attached to the track frame 22 by a balance connecting member 40. When the balance connecting member 40 swings, the track frame has the axis of the connecting shaft 41 as a swing fulcrum. It moves up and down against 22.

  The crawler traveling device 1 includes a crawler guide 42 provided corresponding to each of the above-described roller group, and a crawler guide 43 provided corresponding to the rear grounding wheel 25 and the last grounding wheel 26. .

  As shown in FIG. 2 and FIG. 4, the crawler guides 42 corresponding to the respective roller groups are arranged between a pair of left and right guide wheel bodies of one grounded roller 24 of the wheel group and the other ground roller. A rod-shaped guide body 42a positioned between a pair of left and right guide wheel bodies of the wheel 24, and a connecting rod 42b for connecting the guide body 42a to the balance connecting member 40; The guide main body 42a engages the left and right core metal projections 29a, 29a of the crawler belt 29 to prevent the crawler belt 29 from coming off. The crawler guide 42 corresponding to each wheel group is produced by integrally casting the guide body 42a and the connecting rod 42b together with the balance connecting member 40.

  As shown in FIG. 4, the crawler guide 43 corresponding to the last grounding wheel 26 and the rear grounding wheel 25 is between the left and right guide wheel bodies of the rear grounding wheel 25 and the last grounding wheel. 26, a rod-shaped guide main body 43a located between a pair of left and right guide wheel bodies, and a connecting rod 43b for connecting the guide main body 43a to a guide mounting portion 44 provided in the track frame 22. The guide main body 43a engages the left and right core metal projections 29a of the crawler belt 29 to prevent the crawler belt 29 from coming off. The crawler guide 43 is manufactured by integrally casting the guide main body 43a and the connecting rod 43b.

  The guide mounting portion 44 of the track frame 22 is configured by attaching a metal block to the lateral side surface of the track frame 22. The guide attachment portion 44 has three connection bolts 45 arranged on the end of the guide attachment portion 44 in a triangular arrangement in the vertical direction and the front-rear direction of the track frame 22, thereby connecting the crawler guide 43. 43b is supported.

  The crawler traveling device 1 includes a crawler tension adjusting device A according to an embodiment of the present invention provided at the rear portion of the track frame 22.

  FIG. 3 shows the structure of the crawler tension adjusting device A according to this embodiment in plan view. FIG. 4 shows the structure of the crawler tension adjusting device A according to this embodiment in a side view. FIG. 5 is a longitudinal plan view of the crawler tension adjusting device A according to the present embodiment. FIG. 6 is a longitudinal side view of the crawler tension adjusting device A according to the present embodiment. As shown in these drawings, the crawler tension adjusting device A according to the present embodiment includes the tension ring 27, a tension adjustment frame 51 that supports the tension ring 27 by a ring body support portion 50, and a tension adjustment frame 51. A guide member 52 that supports the tension adjustment frame 51; a tension adjustment shaft 55 that is attached across a locking portion 53a that protrudes from a lateral side portion of the ring body support portion 50; and a support portion 54 that is provided on the guide member 52; It is configured with.

  The tension adjusting frame 51 includes the ring body support portion 50 and a frame main body 51 a made of a square steel pipe having one end connected to the base of the ring body support portion 50.

  FIG. 9 is a plan view of the ring body support portion 50. FIG. 10 is a side view of the ring body support portion 50. As shown in these drawings, the ring body support portion 50 has a bifurcated shaft support fork 56 provided with a pair of shaft support holes 56a and 56a arranged on both sides of the tension ring 27. It is configured with. As shown in FIG. 5, the ring body support portion 50 supports the support shaft 27 a of the tension ring 27 on both sides of the tension ring 27 by the shaft support fork 56. That is, the tension ring 27 is supported on both lateral sides.

  The guide member 52 is disposed on the same lateral side as the lateral side where the grounding wheels 24, 25, 26 of the track frame 22 are located, and a pair of front and rear support arms 22 a, 22 a of the track frame 22. The tension adjusting frame 51 is disposed at an appropriate position on one lateral side of the track frame 22, that is, at a position where the crawler belt 29 is appropriately wound around the tension ring 27. The front support arm 22a corresponds to the “support arm” of the present invention, and the rear support arm 22a corresponds to the “second support arm” of the present invention.

  As shown in FIGS. 6, 7, and 8, the end of the guide member 52 on the side where the tension adjusting frame 51 protrudes and the tension adjusting frame 51 are located above the guide mounting portion 44 of the track frame 22. It is received and supported from below by the support portion 44a via a mediating member 57 having a lower end placed on the support portion 44a formed of an end surface. The mediating member 57 includes an upper sheet metal member 57a whose one side receives and acts on the lower surfaces of the guide member 52 and the tension adjusting frame 51, and a lower sheet metal member interposed between the upper sheet metal member 57a and the support portion 44a. 57b.

  The tension adjusting frame 51 is slidably supported by the guide member 52 when the frame main body 51 a is slidably fitted in the guide member 52, and is slid by the inner surface of the guide member 52. It is guided and slides in the front-rear direction of the track frame 22. The tension adjusting frame 51 is slid in a state where it rises with respect to the track frame 22 as the tension ring 27 moves away from the guide member 52 by setting the sliding direction according to the mounting direction of the guide member 52. In other words, the tension adjustment frame 51 is located above the tension ring 27 of the crawler belt 29 and is located along the track frame 22, and the tension adjustment frame 51 is positioned below the tension ring 27 to be tracked. It slides along a direction close to the direction of the load applied to the tension ring 27 by the tension of the portion inclined to the frame 22.

  The tension adjustment shaft 55 is constituted by a screw shaft that is screwed into a female screw of an adjustment shaft insertion hole provided in the support portion 54 of the guide member 52. The tension adjusting frame 51 is slidably adjusted with respect to the guide member 52 by moving in the front-rear direction and pushing or pulling on the engaging portion 53 a of the ring body support portion 50. The tension adjusting shaft 55 is disposed on the opposite side of the tension adjusting frame 51 from the side on which the track frame 22 is located, and is not affected by the operation of the track frame 22 from the lateral outer side of the traveling machine body of the crawler traveling device 1. Can be operated.

  In short, the crawler tension adjusting device A adjusts the movement while adjusting the tension adjusting shaft 55 by sliding the tension adjusting frame 51 between the guide member 52 and the mediating member 57 by the tension adjusting shaft 55 being rotated. At this time, the tension adjustment frame 51 slides along a direction close to the direction of the load applied to the tension ring 27 due to the tension of the crawler belt 29, and the twist adjustment frame 51 and the guide member 52 are unlikely to be twisted. Slide in state. Then, the tension wheel 27 is moved and adjusted to the rear side with respect to the track frame 22 to press the crawler belt 29 to the rear side of the traveling device, thereby adjusting the tension force of the crawler belt 29 to the increasing side. Alternatively, the tension ring 27 is adjusted to move forward with respect to the track frame 22 to reduce the pressure on the crawler belt 29, thereby adjusting the tension of the crawler belt 29 to the decreasing side.

  As shown in FIGS. 9 and 10, the ring body support portion 50 includes the shaft support fork 56 and the locking portion 53 a, and a pair of upper and lower reinforcing ribs 58 provided on the outer peripheral side of the shaft support fork 56. 58 and a second locking portion 53b provided on the opposite side of the shaft fork 56 from the side where the locking portion 53a is located. The shaft support fork 56, the locking portion 53a, the reinforcing rib 58, and the second locking portion 53b are integrally cast by lost wax casting.

  The second locking portion 53b attaches the tension adjusting shaft 55 when the tension adjusting frame 51 is mounted on the crawler tension adjusting device A of the crawler traveling device 1 on the right side.

[Another Example]
The object of the present invention can also be achieved by adopting a configuration in which the tension adjusting frame 51 is slidably adjusted by a grease cylinder instead of the above-described embodiment. Accordingly, the tension adjusting shaft 55, the grease cylinder, and the like are collectively referred to as a tension adjusting mechanism 55.

22 Track frame 22a Support arm, second support arms 24, 25, 26 Multiple ground wheels 25 Rear ground wheels (adjacent ground wheels)
26 Last Grounding Roller (End Grounding Roller)
27 Tension Ring 29 Crawler Belt 43 Crawler Guide 44 Guide Mounting Portion 51 Tension Adjustment Frame 52 Guide Member 55 Tension Adjustment Mechanism 57 Intermediary Member

Claims (16)

A plurality of grounded wheels rotatably provided on one side of the track frame;
A guide member supported on the lateral side of the track frame in a state along the front-rear direction of the track frame;
A tension adjusting frame supported by the guide member in a slidable state along the front-rear direction;
A tension ring that is rotatably supported by the tension adjustment frame and that supports the crawler belt at the extreme end in the front-rear direction;
A tension adjusting mechanism for adjusting the sliding of the tension adjusting frame with respect to the guide member, and
The tension ring and the end grounding wheel located on the most end side in the front-rear direction among the plurality of grounding wheels are arranged in a state of overlapping in a side view,
An end of the guide member on the side of the tensioning wheel is supported by the track frame at a position farther from the tensioning wheel than the end contact ground wheel in the front-rear direction.
The crawler tension of the crawler traveling device supported on the track frame independently of the end of the guide member opposite to the tension ring is independent of the end of the guide member on the tension ring. Adjustment device. A guide mounting portion supported on one lateral side of the track frame;
A crawler guide supported by the guide mounting portion and acting to prevent the crawler belt from coming off; and
2. The crawler tension adjusting device for a crawler traveling device according to claim 1, wherein an end portion of the guide member on the side of the tension ring is supported by an intermediate member connected to the guide attachment portion.   The crawler tension adjusting device for a crawler traveling device according to claim 2, wherein the mediating member supports an end portion of the guide member on the tension ring side from below.   An end of the guide member on the tensioning wheel side is a position between the end grounding wheel and the adjacent grounding wheel adjacent to the end grounding wheel of the plurality of grounding wheels. The crawler tension adjusting device for a crawler traveling device according to any one of claims 1 to 3, wherein the crawler tension adjusting device is supported.   An end portion of the guide member opposite to the tension wheel is supported by the track frame at a position far from an adjacent grounded wheel adjacent to the end grounded wheel of the plurality of grounded wheels. The crawler tension adjusting device for a crawler traveling device according to any one of claims 1 to 4.   The crawler of the crawler travel device according to any one of claims 1 to 5, wherein an end portion of the guide member opposite to the tension ring is supported by a support arm connected to the track frame. Tension adjustment device.   The crawler tension adjusting device of the crawler traveling device according to claim 6, wherein the support arm supports an end portion of the guide member opposite to the tension ring from below.   The crawler tension adjusting device of the crawler traveling device according to claim 6, wherein the support arm is connected to the one lateral side of the track frame.   In the vertical direction, the support arm supports an end portion of the guide member opposite to the tension ring at a position lower than an end portion of the guide member on the tension ring side. Item 9. A crawler tension adjusting device for a crawler traveling device according to any one of Items 6 to 8. A guide mounting portion supported on one lateral side of the track frame;
A crawler guide supported by the guide mounting portion and acting to prevent the crawler belt from coming off; and
The guide member is supported on the track frame by an intermediate member connected to the guide mounting portion, a support arm connected to the track frame, and a second support arm connected to the track frame. The crawler tension adjusting device of the crawler traveling device according to any one of claims 1 to 9.   The crawler tension adjusting device of the crawler traveling device according to claim 10, wherein the second support arm supports the guide member from a side.   The crawler tension adjusting device for a crawler traveling device according to claim 10 or 11, wherein the second support arm supports the guide member at a position between the mediation member and the support arm.   The crawler tension adjusting device for a crawler traveling device according to any one of claims 10 to 12, wherein the second support arm is connected to an upper surface of the track frame. A guide mounting portion supported on one lateral side of the track frame;
A crawler guide supported by the guide mounting portion and acting to prevent the crawler belt from coming off; and
The end of the guide member on the tension ring side is supported by an intermediary member connected to the guide attachment portion,
The crawler tension adjusting device for a crawler traveling device according to any one of claims 1 to 13, wherein the mediating member slidably supports the tension adjusting frame. A guide mounting portion supported on one lateral side of the track frame;
A crawler guide supported by the guide mounting portion and acting to prevent the crawler belt from coming off;
An intermediate member having one end connected to the guide mounting portion, and
The guide member is formed in a cross-sectional shape opened downward at least at an end on the tension ring side,
The other end of the mediating member is connected from below to the end of the guide member on the side of the tension ring to form the bottom of the end of the guide member on the side of the tension ring, and the guide The crawler tension adjusting device of the crawler traveling device according to any one of claims 1 to 14, wherein an end of the member on the tensioning wheel side is supported.   The crawler tension adjusting device of the crawler traveling device according to claim 14 or 15, wherein the mediating member extends to the tensioning wheel side from an end portion of the guide member on the tensioning wheel side.

Images