JP2007237979A - Crawler guide - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crawler guide capable of effectively preventing the fall of a crawler and reducing the generation of disagreeable metal noise in a technology for preventing any fall of the crawler occurring during the movement of the center of gravity of a vehicle body when passing over a border or by transverse deviation when a combine makes a turn in a movable working machine such as a combine having a crawler type traveling device. <P>SOLUTION: In a crawler type traveling device having crawler guides 11, 12 each guiding a core 14a arranged on the inner circumference of a crawler 14 below a truck frame 15, the crawler guide 12 is provided on a rear lower portion of the truck frame 15, and a plurality of grooves 12c, 12c, 12c and 12c are formed on both faces of a lower rear portion of the crawler guide 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a crawler guide technique provided to prevent crawler disengagement in a crawler type traveling device installed in a mobile work vehicle such as a combine or a transport vehicle.

Conventionally, in a mobile work machine such as a combine equipped with a crawler type traveling device, the crawler is prevented from falling off due to the looseness caused by the shift of the center of gravity of the vehicle body when it crosses the shore or the lateral shift when the combine turns. For this purpose, various techniques related to the crawler guide are known. For example, Patent Document 1 provides a simple crawler guide having an up-and-down movement function by sticking a place where looseness occurs between a substantially central portion of a crawler and adjacent adjacent rollers. It is. Further, in Patent Document 2, a crawler guide is directly provided on an equalizer for following a crawler that changes its shape depending on a running state, thereby preventing the crawler from dropping off accurately.
JP-A-9-277970 Japanese Utility Model Publication No. 5-42063

However, these crawler guides are provided with a guide for preventing the crawlers from dropping off near the center of the lower surface of the inner peripheral portion of the crawler. In other words, in order to provide a crawler drop-off prevention guide, it is effective to guide a certain range including the lower surface front end and the lower surface rear end where the crawler turning direction changes. Therefore, the guide is limited to the vicinity of the substantially central portion, and the front and rear end portions are guided by the driving wheel and the tension roller as usual, so that a remarkable effect was not seen.
Therefore, in order to effectively prevent the crawler from falling off, a technique for providing a crawler guide having a certain range at the front and rear end portions of the inner peripheral portion of the crawler has been publicly known. On the contrary, since the crawler guide and the cored bar of the crawler constantly rub against each other, an unpleasant metal sound is generated.
In view of the above, it is an object of the present invention to provide means for reducing the generation of unpleasant metal noise in the crawler guide so as to effectively prevent the crawler from falling off.

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

  That is, according to the first aspect of the present invention, in the crawler type traveling device provided with the crawler guide that guides the cored bar disposed on the inner periphery of the crawler at the lower portion of the track frame, the crawler guide is provided at the lower rear portion of the track frame, A plurality of grooves are arranged on both side surfaces of the rear part.

  According to a second aspect of the present invention, the groove is provided at a position facing a roller wheel disposed at the rearmost part of the track frame.

  According to a third aspect of the present invention, the groove is provided so as to be inclined downwardly.

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

  According to a first aspect of the present invention, in the crawler type traveling device including a crawler guide that guides a core bar disposed on an inner periphery of the crawler at a lower portion of the track frame, the crawler guide is provided at a lower rear portion of the track frame, By disposing a plurality of grooves on both side surfaces, it is possible to suppress the generation of unpleasant metallic sounds with an easy configuration at low cost.

  In claim 2, the crawler guide at the rear part and the cored bar of the crawler are strongly in contact with each other at the time of turning, but the plurality of grooves are arranged at positions facing the rolling wheels arranged at the rearmost part of the track frame. Therefore, with respect to the unpleasant metal sound that is generated when the crawler guide and the core metal of the crawler continuously scrape, the continuity is cut off by a plurality of grooves provided in the crawler guide, and the unpleasant metal sound is Occurrence can be suppressed.

  According to the third aspect of the present invention, since the groove is provided so as to be inclined downwardly, even if mud or the like is clogged in the groove portion, the groove can be easily removed by contact with the core metal.

Next, embodiments of the invention will be described.
1 is a side view showing the overall configuration of a combine according to an embodiment of the present invention, FIG. 2 is a side view of a crawler type traveling device, and FIG. 3 is a perspective view showing the arrangement of crawler guides. 4 is a perspective view showing a rear crawler guide according to the present invention, FIG. 5 is a side view, FIG. 6 is a front view, and FIG. 7 is a plan view. 8 is a detailed view of the groove portion as viewed from the arrow A in FIG. 5, and FIG. 9 is a cross-sectional view as viewed from the arrow B, similarly.

[overall structure]
First, the overall structure of the combine 1 will be described with reference to FIG.
The combine 1 is configured by placing a machine frame 2 on a crawler traveling device 10 and placing a threshing device 4, a sorting device, a glen tank 5, etc. on the machine frame 2. A driver's seat 6 is disposed at the front of the Glen tank 5.

  In front of the threshing device 4, a pulling / reaping device 7 is disposed. The pulling / cutting device 7 causes the grain flour raised by a weed board 8 provided at the front end to be caused by tine, and the stock is cut with a cutting blade. Thereafter, the harvested culm is fed backward by the upper conveying device, the lower conveying device, and the vertical conveying device, the stock is transferred to the feed chain, and threshing is performed by the threshing device 4 while the cereal is clamped by the feed chain. Is done. The grain after threshing is sorted by a sorting device, and the refined grain is stored in the glen tank 5.

[Crawler type traveling device]
Next, the configuration of the crawler traveling device 10 will be described with reference to FIG. (The arrow direction shown in the figure is the forward direction of travel.)
The crawler type traveling device 10 includes a track frame 15 that supports a pair of left and right crawlers 14, a plurality of wheels (track rollers) 24, 25, 26, and 27, an equalizer 16, and a driven wheel (tension roller) 17. The drive sprocket 18 is supported by a drive shaft that protrudes laterally from a transmission case (not shown).

  A front crawler guide 11 and a rear crawler guide 12 are provided on the lower surface of the inner peripheral portion of the crawler 14 in the front-rear direction with the equalizer 16 interposed therebetween, and are fixed to the track frame 15. The crawler 14 is prevented from falling off.

  The track frame 15 is pivotally supported at the lower end of the swing arm 21, and the swing arm 21 is pivotally supported by fulcrum pipes 20 and 20 supported by the lower frames 2 b and 2 b of the body frame 2. In the case of a configuration in which the airframe is not controlled to be lifted or lowered, the track frame is fixed to the airframe frame. Further, the swing arm 21 is disposed at four positions, front, rear, left and right, and a piston rod 22a of the elevating cylinder 22 is pivotally supported at the upper end of the rear swing arm 21R on the rear side. A base portion of the elevating cylinder 22 is pivotally supported by the upper frame 2a, and a connecting rod 23 is pivotally supported at a lower portion of a pivotal support portion of the piston rod 22a and the swing arm 21. Accordingly, the rear swing arm 21R is pivotally connected to the front swing arm 21F, and is configured such that the lift frame 22 can be controlled to move up and down by operating the lift cylinder 22 by an input from a horizontal sensor or manually.

  A first wheel 24, a second wheel 25, an equalizer 16, a third wheel 26, and a fourth wheel 27 are disposed in this order from the front end to the rear end of the track frame 15. Above this, a tension roller 17 and a carrier roller 34 for guiding the upper side of the crawler 14 are disposed.

  Each of the rollers and the equalizer roller are rotatably supported. The carrier roller 34 and the drive sprocket 18, the first roller 24, the second roller 25, the equalizer rollers 16c and 16d of the equalizer 16, and the third roller. The crawler type traveling device 10 can travel by winding the wheel 26, the fourth wheel 27, the tension roller 17, and the crawler 14 in this order.

The equalizer 16 is provided with a pivot fulcrum 16a at the 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 14 is loosened, the crawler 14 is likely to drop off. Has drawbacks. For this reason, the equalizer 16 is required to have a function of constantly applying tension to the crawler 14. In the present embodiment, since the installation location of 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), a torque spring is provided between the rotation fulcrum 16a and the equalizer frame 16b. (Not shown) is interposed, and the torque spring (not shown) is arranged so that the front equalizer roller 16c is always pushed downward.

  Note that the tensioning mechanism provided in the equalizer 16 is not limited to the above-described structure via the torque spring (not shown), and may be configured using, for example, a hydraulic cylinder, a shock damper, or the like. Good. Further, the direction in which the equalizer 16 is urged to the crawler 14 is not limited to the direction in which the “front equalizer roller 16c” is always pushed downward as described above. For example, the installation location of the equalizer 16 is the center of the body (installation length). In the case where it is disposed after the center), it is necessary to urge the crawler 14 in a direction in which the “rear equalizer roller 16d” is always pushed downward.

[Crawler Guide]
Next, the crawler guides 11 and 12 will be described with reference to FIGS. (The arrow direction in the figure is the forward direction of travel.)
As described above, the crawler guides 11 and 12 are disposed on the track frame 15 as the front crawler guide 11 and the rear crawler guide 12 in the front-rear direction with the equalizer 16 interposed therebetween, and prevent the crawler 14 from falling off.

First, the rear crawler guide 12 according to the present invention will be described.
The rear crawler guide 12 is composed of a bottom plate 12a and a reinforcing member 12b provided on the top surface thereof, and the bottom plate 12a has its front and rear end portions gently curved upward in a side view and a front end in a substantially plan view. It has a lead-in portion with a tapered portion, and has a substantially “ski board” or “boat bottom” shape. Further, at the upper part of the reinforcing member 12b, two front and rear mounting holes 13 and 13 are arranged in parallel in the left-right direction with an appropriate interval. It is attached to the frame 15 or the like via a fastening material (bolt or the like).

  The shape of the bottom plate 12a is not a straight shape but a gentle wave shape in the range excluding the leading portions at both front and rear ends in a side view. Accordingly, the crawler 14 can be tensioned by a plurality of line contacts instead of a single surface contact, so that it is possible to efficiently follow the shape deformation of the crawler 14 due to over the shore or running on wet fields.

  Further, a plurality of grooves 12c, 12c,... Are provided on both side surfaces of the bottom plate 12a on the rear side in the traveling direction, and unpleasant metallic noise generated by rubbing between the crawler guide 12 and the core metal of the crawler 14 is generated. Is decreasing. In other words, in the crawler type traveling device 10 according to the present invention, the drive sprocket 18 is disposed on the front side in the traveling direction, so that the tension generated in the crawler 14 during forward traveling frequently used is the rear of the crawler guides 11 and 12 at the rear. The maximum value is obtained at the side end portion, which causes generation of an unpleasant metal sound with the cored bar 14a disposed at the center of the crawler 14 on the inner peripheral side. Therefore, the cause of the occurrence can be effectively removed aiming at the place of occurrence. Accordingly, a plurality of grooves or irregularities are formed in a portion in contact with the core bar on the rear side surface of the crawler guide located on the rear side in the traveling direction of the crawler type traveling device.

Here, a plurality of grooves 12c are formed on the left and right sides of the bottom plate 12a in a front view with an appropriate interval in the front-rear direction at the rear lower portion of the rear crawler guide 12, and penetrated obliquely upward from the bottom surface of the bottom plate 12a. It is constituted by a substantially semicircular cut. The groove 12c is located on the lower side of the wheel 27 supported at the rearmost part of the track frame 15, and is provided so as to be opposed. Thus, during turning, the metal core 14a is strongly sandwiched and rubbed between the bottom plate 12a where the groove 12c of the rear crawler guide 12 is located and the wheel 27, but the groove 12c prevents the generation of metallic noise. Further, by providing the groove 12c in an obliquely downward direction, the position of contact with the cored bar 14a is changed during turning to suppress noise, and mud or the like clogged in the groove 12c is easily removed. However, the cutting shape, number and size are not limited.
In the present invention, the groove 12c is formed by a substantially semicircular cut for reasons of ease of processing and the like, but the present invention is not limited to this, and may have a cross-sectional shape such as a rectangular shape. Although it is good, it is not a good idea to connect the right and left grooves 12c and 12c facing each other on the bottom surface of the bottom plate 12a. In this case, the crawler 14 may be caught with the crawler guide 12 during turning.

  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 inward centripetal force generated in the crawler 14 during turning. Further, the reinforcing member 12b has a shape in which the upper and lower end portions and the substantially central portion are curved in a side view, and the upper portion is curved. The shape is such that interference with 26, 27, etc. does not occur.

  The rear crawler guide 12 is constituted by the bottom plate 12a and the reinforcing material 12b, and has an inverted T shape in a front view cross section. In the present invention, the bottom plate 12a and the reinforcing material 12b are integrally formed by casting or the like, but may be separately manufactured and attached by welding or the like.

Next, the front crawler guide 11 will be described.
The front crawler guide 11 includes a bottom plate 11a having an L shape in a side view and a reinforcing member 11b disposed on an upper surface thereof, and has an inverted T shape in a front view cross section. That is, the bottom plate 11a is extended in the substantially horizontal direction and the front side, the tip portion thereof is gently curved upward, and forms a guide portion in which the tip portion is tapered in a substantially plan view. Further, the rear portion of the bottom plate 11a gently curves upward and extends upward together with the reinforcing material 11b.

  Mounting holes 19 and 19 are provided at the upper end of the reinforcing member 11b at the substantially central upper part and the rear part. The mounting holes 19 and 19 are provided as mounting holes for the track frame 15 and the like as with the rear crawler guide 12. Used. In addition, when the reinforcing member 11b is also disposed on the track frame 15, a shape in which the upper portion is curved at a necessary portion in order to prevent interference with the wheels 24, 25, etc. provided nearby. have.

  Further, the horizontal portion of the bottom plate 11a is also formed in a gentle wave shape so that tension can be applied to the crawler 14 as efficiently as the rear crawler guide 12. In the case of a work vehicle that frequently travels before and after a backhoe or the like, it is also possible to provide a configuration in which grooves are provided on both side surfaces of the front lower portion of the front crawler guide 11 symmetrically in the front-rear direction.

  Thus, by providing the front crawler guide 11 and the rear crawler guide 12 described above, the crawler 14 is prevented from falling off during turning, and the generation of unpleasant metal noise is reduced. Specifically, in FIG. 9, the bottom plate 12a (11a) is always located inside the cored bar 14a of the crawler 14, so that the crawler 14 is prevented from falling off and the groove 12c is disposed within a certain range ( 9), the contact between the crawler guide 12 and the crawler 14 is cut off, so that the contact area between the two is reduced, and the unpleasant metal sound generated by rubbing can be reduced. .

The side view which showed the whole structure of the combine which concerns on one Example of this invention. The side view of a crawler type traveling device. The perspective view which shows arrangement | positioning of a crawler guide. The perspective view which shows the crawler guide of the rear part which concerns on this invention. Similarly side view. Similarly front view. FIG. In FIG. 5, the detailed view of the groove part seen from the arrow A. Similarly, sectional drawing seen from arrow B.

Explanation of symbols

12 Rear crawler guide 13 Mounting hole 12a Bottom plate 12b Reinforcement material 12c Groove

Claims (3)

  In a crawler type traveling device provided with a crawler guide that guides a core bar disposed on an inner periphery of a crawler at a lower portion of a track frame, a crawler guide is provided at a lower lower portion of the track frame, and a plurality of grooves are formed on both side surfaces of the lower rear portion of the crawler guide. A crawler guide, characterized by comprising:   The crawler guide according to claim 1, wherein the groove is provided at a position facing a roller wheel disposed at the rearmost portion of the track frame. The crawler guide according to claim 1, wherein the groove is provided so as to be inclined downwardly.

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