JPH0687171U - Movable wheel structure in crawler traveling device - Google Patents

Abstract

(57) [Summary] [Purpose] Despite the fact that the movable wheel is formed as a double flange type, it reduces the adhesion and accumulation of mud on the track frame as much as possible, and significantly improves the running performance in wetlands. [Structure] The inner ring width A of the movable roller 16 is set narrower than the outer ring width B. That is, by shifting the inner end position of the movable rolling wheel 16 to the outside without shifting the position of the special track frame 9 to the inner side as in the conventional case, the movable rolling wheel 1 is moved.
A space for disposing the swing arm 13 is secured between 6 and the track frame 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a movable wheel structure in a crawler traveling device provided in a combine or the like.

[0002]

[Problems to be Solved by Prior Art and Invention]

 Generally, this type of crawler traveling device is configured to guide the ground contact portion of the crawler suspended by the drive wheel and the idler by a plurality of rolling wheels juxtaposed outside the track frame. In the case where all of the wheels are fixed, there is a drawback in that when the vehicle runs on a step, it will overturn the step while tilting forward and backward like a so-called seesaw, which will give a large impact to the aircraft. Therefore, a part or all of the above-mentioned rolling wheels are configured to be movable rollers by connecting them to a track frame via swing arms which are swingable up and down and are urged downward. It has been proposed in the past to make the step running smooth based on this, and in this case, it is desirable to form the movable wheel into a so-called double flange type that can effectively control the twist of the crawler. However, when the movable wheel is a double flange type, it is necessary to bias the track frame inward to secure a space for arranging the swing arm between the movable frame and the track frame. As a result, mud adherence and accumulation on the track frame increased, resulting in a problem of reduced runnability in wetlands.

[0003]

[Means for Solving the Problems]

 The present invention was devised with the object of providing a movable roller structure in a crawler traveling device that can eliminate these drawbacks in view of the above circumstances, and guides the ground portion of the crawler. Therefore, in a crawler traveling device in which a rolling wheel, which is arranged on the outer side of the track frame, is vertically swingable and is connected to the truck frame via a swing arm which is in a downwardly biased state, It is characterized in that it is formed into a double-flange type having an inner ring and an outer ring, and the inner ring width is set narrower than the outer ring width to bias the inner end position of the rolling wheel to the outside. With this configuration, the present invention reduces the adhesion and accumulation of mud on the track frame as much as possible to form a movable wheel with a double-flange type structure, thereby significantly improving the runnability in wetlands. This is something that can be improved.

[0004]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a combine traveling machine, and the traveling machine body 1 is a pretreatment unit 2 for cutting stem culms, a threshing selection for threshing the cut culms and selecting the threshed grains. It comprises a part 3, a post-processing part 4 for discharging threshed culm, a pair of left and right crawler running devices 5 for running the traveling machine body 1, and the like, but these basic configurations are the same as before. Is.

The crawler traveling device 5 includes an endless crawler 6 made of a rubber elastic material, a drive wheel 7 that is driven and rotated by engine power, an idler 8 that is positionally adjustable in the front-rear direction, and a front-rear position. It is configured so as to be suspended by a plurality of rolling wheels 10 arranged side by side on the outer side of the facing track frame 9, and the traveling vehicle body 1 can be driven by the operation of the crawler 6 in accordance with the driving rotation of the driving wheels 7. I'm running.

By the way, the plurality of rolling wheels 10 guide the inner peripheral surface of the ground portion of the crawler 6, but a pair of inner and outer protrusions projecting from the inner peripheral portion of the crawler 6 at a predetermined interval. In order to guide the crawler 6 in a posture of straddling (a ridge formed on a core metal (not shown)) 6a, 6b, the crawler 6 is formed in a so-called double flange type having an inner ring and an outer ring. It has become possible to regulate effectively.

Reference numeral 11 denotes a bracket-shaped bracket which is provided at an intermediate position of the track frame 9 so as to project upward, and a boss cylinder 12 facing left and right is integrally fixed to an upper end portion of the bracket 11. Although provided, the boss cylinder 12 is rotatably supported by a pivot 14 projecting from the inner surface of the base end portion of a swing arm 13 to be described later, and the swing arm 13 is always directed downward. A coil-shaped biasing ammunition 17 for biasing is attached to the outer peripheral portion.

On the other hand, a support shaft 15 is integrally provided on the outer surface of the tip end portion of the swing arm 13, and the support shaft 15 is located at the center of the plurality of rolling wheels 10. The movable roller 16 is configured to rotatably support an object. In other words, the movable wheel 16 is swingable in the vertical direction and is connected to and supported by the track frame 9 via the swing arm 14 which is in the downwardly biased state. Therefore, the movable wheel 16 travels in a place having unevenness such as a step. At this time, the shock can be absorbed based on the vertical movement of the movable wheel 16.

The movable wheel 16 is formed as a double flange type including an inner wheel 16a and an outer wheel 16b, like the wheel 10, but the inner wheel width A is set to be narrower than the outer wheel width B. . That is, by displacing the inner end position of the movable roller 16 to the outside, a space for disposing the swing arm 13 is secured between the movable roller 16 and the track frame 9.

In the embodiment of the present invention configured as described above, when the movable roller 16 travels in a place where there is a concave or convex portion such as a step, it is vertically displaced to absorb the shock. However, in order to effectively control the twist of the crawler 6, it is formed in a double flange type having an inner ring 16a and an outer ring 16b, and an inner ring width A is set narrower than an outer ring width B. In other words, by shifting the inner end position of the movable roller 16 to the outside without shifting the position of the special track frame 9 to the inside as in the conventional case, the gap between the movable roller 16 and the track frame 9 is changed. Moreover, the space for arranging the swing arm 13 is secured. Therefore, the distance C between the inner end of the crawler 6 and the outer end of the track frame 9 can be secured as large as possible, and as a result, the adhesion and accumulation of mud on the track frame 9 can be reduced as much as possible. As a result, the running performance in wetlands can be significantly improved.

It should be noted that the present invention is not limited to the above-described embodiment, and the point is that the inner diameter of the movable wheel of the double flange type is set narrower than the width of the outer ring. Therefore, the inner ring 16a is configured to guide the groove portion 6c between the both protrusions 6a and 6b without straddling the both protrusions 6a and 6b as in the second embodiment shown in FIG. 4, for example. You can do it.

[0012]

[Operation effect]

 In short, since the present invention is configured as described above, the movable roller wheel that is vertically movably connected to the track frame via the swing arm is formed in the double flange type including the inner ring and the outer ring. Although the crawler twist is effectively regulated, the inner diameter of the movable wheel is set to be narrower than the outer wheel width in order to bias the inner end position of the movable wheel to the outside. That is, it is possible to secure a space for disposing the swing arm between the movable wheel and the track frame without shifting the position of the track frame to the inside as in the conventional case. Therefore, the track frame can be arranged at a position as far as possible from the inner end of the crawler to reduce the adhesion and accumulation of mud on the track frame as much as possible. Can be significantly improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a combine.

FIG. 2 is a side view of a crawler traveling device.

FIG. 3 is a front view of a movable wheel.

FIG. 4 is a front view of a movable roller according to a second embodiment.

[Explanation of symbols]

 1 Traveling Aircraft 5 Crawler Traveling Device 6 Crawler 7 Drive Wheel 8 Idler 9 Truck Frame 10 Rolling Wheel 13 Swing Arm 16 Movable Rolling Wheel 16a Inner Ring 16b Outer Ring A Inner Ring Width B Outer Wheel Width

Claims (1)

[Scope of utility model registration request] 1. A rolling wheel disposed outside a track frame for guiding a grounding portion of a crawler is connected to the track frame through a swing arm which is vertically swingable and downwardly biased. In the crawler traveling device,
The crawler is characterized in that the rolling wheel is formed in a double flange type including an inner ring and an outer ring, and the inner ring width is set narrower than the outer ring width so that the inner end position of the rolling wheel is biased to the outside. Movable wheel structure in traveling equipment.