JP2008074173A - Crawler type travelling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crawler type travelling device preventing catch of a foreign matter such as a stone between a crawler guide and a road wheel. <P>SOLUTION: The crawler type travelling device 10 is formed by wrapping a crawler belt 14 between a driving wheel 18 and a driven wheel 17, and the crawler belt 14 is guided by a plurality of road wheels 24, 25, 26, 27 and 28 and crawler guides 11 and 12. A rear crawler guide 12 is arranged in the fore-and-aft direction under narrow parts 46, 47 and 48 in right, left and central parts of the road wheels 26, 27 and 28, and the shape of a recessed part 12c of the rear crawler guide 12 positioned under the narrow part 47 is formed into a circular shape concentric with the turning axis O1 of the road wheel 27 in a side view. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technology of a crawler type traveling device, and more particularly to a technology that makes it difficult for foreign matters such as stones to be caught between a crawler guide and a wheel.

  2. Description of the Related Art Conventionally, a crawler type traveling device that winds a crawler belt between a driving wheel and a driven wheel and guides the crawler belt with a plurality of rollers and a crawler guide is known. For example, as described in Patent Documents 1 and 2.

The crawler traveling device includes a track frame that supports a pair of left and right crawlers, a plurality of wheels, an equalizer, a driven wheel, a drive sprocket, and a crawler guide. The crawler guide is disposed in the front-rear direction below the constricted portion at the center of the left and right sides of the wheel, and the upper portion of the crawler guide positioned below the constricted portion is formed with a concavely curved concave portion. It is made not to interfere with etc.
JP-A-9-277970 Japanese Utility Model Publication No. 5-42063

  However, since the concave shape of the crawler guide is not concentric with the rotation axis of the wheel (FIGS. 7 and 8), foreign substances such as stones are easily caught between the crawler guide and the wheel, As a result, the wheels may wear.

  In view of the above situation, an object of the present invention is to provide a crawler type traveling device in which foreign substances such as stones are not easily caught between a crawler guide and a roller.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

That is, in claim 1,
In a crawler type traveling device in which a crawler belt is wound between a driving wheel and a driven wheel, and the crawler belt is guided by a plurality of wheels and a crawler guide.
A crawler guide is disposed in the front-rear direction below the constricted portion at the center of the left and right of the wheel, and the concave shape of the crawler guide located below the constricted portion is concentric with the rotation axis of the wheel in a side view. It is composed.

In claim 2,
The crawler guides are arranged so that the heights of the upper ends on both sides of the recesses are located at substantially the same height as the rotation axis of the wheel disposed above the crawler guide.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect, it is difficult for foreign matters such as stones that are larger than the gap between the concave portion of the crawler guide and the wheel to be caught, and small ones are easily removed.

  According to the second aspect, the wheel can be guided in a larger area than the conventional crawler guide, and foreign matters such as stones are difficult to enter from the front and rear.

  Next, the best mode for carrying out the invention will be described. 1 is a side view showing the overall structure of the combine, FIG. 2 is a side view showing a crawler type traveling device, FIG. 3 is a perspective view showing the arrangement of crawler guides, and FIG. 4 is a rear crawler guide. FIG. 5 is a side view schematically showing a crawler guide and a wheel, FIG. 6 is a cross-sectional view taken along line YY ′ in FIG. 5, and FIG. 7 is a side view schematically showing a conventional crawler guide and a wheel. 8 and 8 are sectional views taken along line YY 'in FIG. In the following description, the arrow direction shown in the figure is the front-rear direction.

  First, the overall configuration of the combine 1 will be described. As shown in FIG. 1, the combine 1 has a machine frame 2 disposed on a crawler type traveling device 10, and a threshing device 4, a sorting device, a Glen tank 5, and the like are disposed on the machine frame 2. A driver's seat 6 is disposed in front of the tank 5. In front of the threshing device 4, a pulling / cutting device 7 is disposed, and a weeding board 8 is disposed at the front end of the pulling / cutting device 7.

  In this way, the cereal is raised by the weed board 8 and is caused by tine, and the stock is cut by the cutting blade. The harvested corn straw is conveyed rearward by the upper conveying device, the lower conveying device, and the vertical conveying device, and the stock is inherited by the feed chain and threshed by the threshing device 4 while being held. The threshed grains are sorted by a sorting device, and the refined grains are stored in the glen tank 5.

  Next, the crawler type traveling device 10 will be described. As shown in FIG. 2, the crawler type traveling device 10 includes a track frame 15 on which a pair of left and right crawler belts 14 are supported, a plurality of rolling wheels (track rollers) 24, 25, 26, 27, and 28, and driven wheels. (Tension roller) 17, drive wheel (drive sprocket) 18, equalizer 16, and crawler guides 11 and 12 that prevent the crawler belt 14 from falling off when the combine 1 is turned.

  The track frame 15 is pivotally supported at the lower end of the swing arm 21 disposed at four positions on the front and rear, left and right of the body frame 2. The swing arm 21 is pivotally supported by fulcrum pipes 20 and 20 supported by the lower frames 2b and 2b of the body frame 2. The swing arm 21 includes a front swing arm 21F and a rear swing arm 21R, and the front swing arm 21F and the rear swing arm 21R are pivoted.

  A piston rod 22a of the elevating cylinder 22 is pivotally supported on the upper end of the rear swing arm 21R, and a base portion of the elevating cylinder 22 is pivotally supported on the upper frame 2a of the body frame 2. A connecting rod 23 is pivotally supported at the lower part of the pivotal support portion between the piston rod 22a and the rear swing arm 21R.

  In this way, the lifting cylinder 22 is operated by the input from the horizontal sensor or manually, and the track frame 15 is lifted and lowered. Note that the track frame 15 is fixed to the body frame 2 when the body is not controlled to be lifted or lowered.

  Further, as shown in FIGS. 2 and 3, the track frame 15 is provided with a wheel 24, a wheel 25, an equalizer 16, a wheel 26, a wheel 27, and a wheel 28 in order from the front. Each of the wheels 24, 25, 26, 27, and 28 is rotatably supported.

  The wheel 24 is formed in a double flange type in which an inner ring 24b and an outer ring 24c are welded to a wheel boss 24a. A constricted portion 44, which is an area surrounded by the wheel boss 24a, the inner ring 24b, and the outer ring 24c, is formed at the left and right center of the wheel 24. In addition, although the rolling wheel 24 was demonstrated here, the rolling wheels 25, 26, 27, and 28 are each formed in a double flange type similarly to the rolling wheel 24, and the constriction parts 45, 46, 47, and 48 are formed. Yes.

  A driven wheel 17 is disposed on the rear portion of the track frame 15, and a carrier roller 34 that guides the upper side of the crawler belt 14 is disposed in the middle of the track frame 15. The shaft is rotatably supported. A drive wheel (drive sprocket) 18 is fixed on a drive shaft that protrudes laterally from a mission case (not shown).

  The equalizer 16 is provided with a rotation fulcrum 16a at an upper center of the front and rear of the equalizer frame 16b, and equalizer rollers 16c and 16d are rotatably supported on both lower sides thereof. When the equalizer 16 is provided, there is an advantage that the center of gravity of the vehicle body can be smoothly moved when over the shore, etc., but on the other hand, when the crawler belt 14 is loosened, the crawler belt 14 is liable to drop off. Have For this reason, the equalizer 16 requires a mechanism that always applies tension to the crawler belt 14. In the present embodiment, since the equalizer 16 is disposed in front of the center of the machine body (the center of the installation length, the line a shown in FIG. 2), the front equalizer roller 16c is always rotated downward so that it is pushed downward. A torque spring is disposed between the moving fulcrum 16a and the equalizer frame 16b.

  When the equalizer 16 is disposed behind the center of the machine body, it is necessary to urge the crawler belt 14 so that the rear equalizer roller 16d is always pushed downward. The mechanism for applying tension to the crawler belt 14 is not limited to the configuration using the torque spring, and may be configured using, for example, a hydraulic cylinder, a shock damper, or the like.

  Thus, the crawler belt 14 is wound in the order of the carrier roller 34, the drive wheel 18, the wheel 24, the wheel 25, the equalizer rollers 16c and 16d of the equalizer 16, the wheel 26, the wheel 27, the wheel 28, and the driven wheel 17. Thus, the crawler traveling device 10 can travel.

  Next, the crawler guides 11 and 12 will be described. As shown in FIG. 3, the crawler guides 11 and 12 are arranged on the track frame 15 as a front crawler guide 11 and a rear crawler guide 12 in the front-rear direction with the equalizer 16 interposed therebetween.

  As shown in FIGS. 3 and 4, the rear crawler guide 12 is disposed in the front-rear direction below the constricted portion 46 of the roller wheel 26, the constricted portion 47 of the roller wheel 27, and the constricted portion 48 of the roller wheel 28. The rear crawler guide 12 includes a bottom plate 12a and a reinforcing member 12b disposed on the upper surface of the bottom plate 12a. The bottom plate 12a and the reinforcing member 12b are integrally formed by casting or the like. In the cross section, it is formed in an inverted T shape. Two mounting holes 13, 13 opened in the left-right direction are juxtaposed at an appropriate interval on the top of the reinforcing member 12 b, and the rear crawler guide 12 is fastened by a fastening material ( And is attached to the track frame 15 via bolts or the like.

  As shown in FIG. 4, the bottom plate 12a is gently curved upward in the side view and tapered in the plan view to form a guide portion, and has a substantially ski plate or a substantially bottom shape. The bottom plate 12a is formed in a gentle wave shape in a side view in a range excluding the leading portions at the front and rear ends. As a result, the crawler belt 14 can be tensioned by a plurality of line contacts instead of a single surface contact, so that it can efficiently follow the shape deformation of the crawler belt 14 due to crossing the shore or running on wet fields.

  The reinforcing member 12b is made of a member having a substantially rectangular cross section when viewed from the front, and has sufficient strength that the bottom plate 12a does not bend due to the centripetal force generated in the crawler belt 14 during turning. Further, as shown in FIG. 4, the reinforcing member 12 b is formed with concave portions 12 c, 12 c, and 12 c that are formed by bending the front and rear ends and the upper portion of the substantially central portion in a side view, and the rear crawler guide 12 Is arranged so as not to interfere with the wheels 26, 27, 28, etc. That is, as described above, the rear crawler guide 12 is disposed in the front-rear direction below the constricted portion 46 of the wheel 26, the constricted portion 47 of the wheel 27, and the constricted portion 48 of the wheel 28. A recess 12c formed at the front end of the material 12b is positioned below the constricted portion 46 of the roller wheel 26, and a recess 12c formed at the front and rear central portion of the reinforcing member 12b is formed on the constricted portion 47 of the roller wheel 27. A recessed portion 12c that is positioned below and formed at the rear end of the reinforcing member 12b is positioned below the constricted portion 48 of the wheel 28.

  Next, the recess 12c of the rear crawler guide 12 will be described. The concave portion 12c of the rear crawler guide 12 has substantially the same configuration as the concave portions of the other crawler guides. Therefore, unless otherwise specified, the concave portion 12c formed in the reinforcing material 12b of the rear crawler guide 12 is described below. The configuration will be described.

  As described above, the recess 12c is formed in a shape in which the upper portion of the reinforcing member 12b is bent and curled. Specifically, as shown in FIGS. 4 to 6, the recess 12c formed in the front and rear central portion of the reinforcing member 12b has a diameter slightly larger than the diameter of the wheel boss 27a of the roller 27 (and the inner ring 27b and The gap G1 is formed between the peripheral surface of the roller boss 27a and the peripheral surface of the recess 12c. The gap G1 has a size that does not allow pebbles to enter, and sand or the like has a size that exits from the gap G1. The substantially semicircular or arcuate concave portion 12c is formed on the concentric axis with the rotational axis O1 of the wheel 27. That is, the circular center O2 of the substantially semicircular or arc-shaped concave portion 12c is formed on a concentric axis with the rotational axis O1 of the wheel 27. Thus, the distance L1 is formed in the radial direction from the peripheral edge of the wheel boss 27a to the peripheral edge of the recess 12c. The distance between the front and rear ends of the periphery of the wheel boss 27a and the upper ends P1 on both front and rear sides of the recess 12c (the gap G1). The opening width (L1) is also formed in the radial direction (FIG. 5). Thus, when the distance between the roller boss 27a and the recess 12c becomes constant (L1), stones larger than the distance L1 do not enter the gap G1, and stones that fall into the gap G1 are reversed. May be discharged. In addition, although the recessed part 12c formed in the front-back center part of the reinforcing material 12b was demonstrated here, the recessed part 12c formed in the front end of the reinforcing material 12b and the recessed part 12c formed in the rear end of the reinforcing material 12b are also mentioned. It is configured in the same manner as the concave portion 12c formed in the front and rear central portions of the reinforcing member 12b.

  Further, the recess 12c formed in the front and rear center portion of the reinforcing member 12b is formed in a substantially semicircular shape having a central angle of approximately 180 degrees. Specifically, as shown in FIG. 5, in the recess 12c, the heights of the upper ends P1 on both the front and rear sides of the recess 12c are substantially the same as the rotation axis O1 of the wheel 27 arranged above the recess 12c. It is arranged to be located in. Thus, the wheel 27 is guided over the substantially semicircular shape (substantially lower half of the wheel boss 27a) by the recess 12c with the gap L1 therebetween. Thus, the distance L1 between the wheel boss 27a and the recess 12c is shorter than the distance L3 in the conventional crawler guide 112 shown in FIG. 7, and stones or the like larger than the distance L1 are less likely to stay on the gap G1. No biting occurs between 27 and the crawler guide 112. The wheel 27 can be attached by inserting the wheel boss 27a into the recess 12c from above. Here, the area of the rolling boss 27a guided in a substantially semicircular shape by the recess 12c with a distance L1 is defined as A1 (FIG. 5).

  On the other hand, in the conventional crawler guide 112, as shown in FIGS. 7 and 8, the recess 112c is formed in an arc shape having a diameter larger than the diameter of the wheel boss 27a of the wheel 27, and the wheel boss 27a. A gap G <b> 2 is formed between the peripheral surface and the peripheral surface of the recess 112 c. The circular center O4 of the arc-shaped recess 112c is positioned above the rotation axis O3 of the wheel 27 and is not formed concentrically with the rotation axis O3 of the wheel 27. For this reason, the distance in the radial direction from the peripheral edge of the wheel boss 27a to the peripheral edge of the recess 112c is the distance L2 at the lower end of the recess 112c, and the distance gradually increases from L2 above the lower end of the recess 112c. The upper end P2 on both front and rear sides of 112c is formed so as to greatly change to L3, and the distance from the front and rear ends of the periphery of the roller boss 27a to the upper end P2 on both front and rear sides of the recess 112c (opening width of the gap G2) is An interval L3 is formed in the radial direction (FIG. 7). Here, the interval L3 is larger than the interval L1, and L3> L1. For this reason, in the conventional crawler guide 112, when pebbles enter the gap G2, the pebbles slide down to the bottom of the recess 112c, and as the rollers 27 rotate, they enter the narrowest part of the gap G2. Not only the roller 27 is worn, but also the biting between the roller 27 and the crawler guide 112 may occur.

  Further, in the conventional crawler guide 112, the height of the upper end P2 on both the front and rear sides of the concave portion 112c is substantially the same as the rotational axis O3 of the wheel 27 arranged above the concave portion 112c. Is not arranged to be located. Specifically, as shown in FIGS. 7 and 8, the height of P <b> 2 is arranged to be lower than the rotation axis O <b> 3 of the wheel 27 by ΔH. Therefore, the recess 112c does not cover the wheel boss 27a in a substantially semicircular shape (substantially lower half of the wheel boss 27a), and the area A2 of the wheel boss 27a guided by the recess 112c is the area A1. Smaller than.

  As described above, the crawler type traveling device 10 according to the present embodiment winds the crawler belt 14 between the driving wheel 18 and the driven wheel 17, and the crawler belt 14 is provided with a plurality of rollers 24, 25, 26, 27. In the crawler type traveling device 10 guided by 28 and the crawler guides 11 and 12, the rear crawler guide 12 is arranged in the front-rear direction below the constricted portions 46, 47 and 48 at the center of the left and right of the rollers 26, 27 and 28. The concave portion 12c of the rear crawler guide 12 positioned below the constricted portions 46, 47, and 48 is formed concentrically with the rotational axis O1 of the rollers 26, 27, and 28 in a side view.

  That is, as described above, in the rear crawler guide 12, the opening width of the gap G1 is formed with the interval L1, and this interval L1 is larger than the opening width of the gap G2 in the conventional crawler guide 112 (interval L3). Is also small.

  By adopting such a configuration, foreign matters such as stones that are larger than the distance L1 between the recess 12c of the rear crawler guide 12 and the rollers 26, 27, and 28 are less likely to be caught, and small ones are easily removed. .

  And the height of the upper ends of both sides of the concave portion 12c of the rear crawler guide 12 is arranged so as to be located at substantially the same height as the rotation axis O1 of the wheel 27 arranged above the rear crawler guide 12. It is.

  That is, as described above, in the rear crawler guide 12, the wheel boss 27a of the roller 27 is guided by the area A1 over the substantially semicircular shape with the interval L1 by the recess 12c. It is larger than the area A2 in the conventional crawler guide 112.

  With such a configuration, it is possible to guide the wheel 27 with an area A1 wider than that of the conventional crawler guide 112, and it is difficult for foreign matters such as stones to enter from the front and rear.

The side view which showed the whole structure of the combine. The side view which showed the crawler type traveling apparatus. The perspective view which showed arrangement | positioning of a crawler guide. The side view which showed the back crawler guide. The side view which showed the crawler guide and the wheel schematically. FIG. 6 is a sectional view taken along line Y-Y ′ in FIG. 5. The side view which showed the conventional crawler guide and the wheel schematically. FIG. 8 is a sectional view taken along line Y-Y ′ in FIG. 7.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Crawler type traveling apparatus 11 Front crawler guide 12 Rear crawler guide 12c Concave part 14 Crawler belt 17 Driven wheel 18 Drive wheel 24/25/26/27/28 Roller wheel 44/45/46/47/48 Constriction part O1 Rotating shaft heart

Claims (2)

In a crawler type traveling device in which a crawler belt is wound between a driving wheel and a driven wheel, and the crawler belt is guided by a plurality of wheels and a crawler guide.
A crawler guide is disposed in the front-rear direction below the constricted portion at the center of the left and right of the wheel, and the concave shape of the crawler guide located below the constricted portion is concentric with the rotation axis of the wheel in a side view. A crawler type traveling device characterized by comprising.   The height of the upper ends of both sides of the concave portion of the crawler guide is arranged so as to be positioned at substantially the same height as the rotation axis of a roller wheel arranged above the crawler guide. Crawler type traveling device.

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