JPS6221502Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a tracked vehicle constructed as an undercarriage such as a hydraulic excavator or a hydraulic crane.

1 to 4 show conventional tracked vehicles. First, in FIGS. 1 and 2, a tracked traveling body 1 has a sprocket 2 rotated by a hydraulic motor (not shown), and a sprocket 2.
A driven idler 3, a track crawler 4 wound between the sprocket 2 and the idler 3, and a pair of side frames 5 for attaching the sprocket 2 and the idler 3 are provided on each side. It is generally constructed by attaching a center frame 6 between frames 5, 5. The side frame 5 has lower rollers 7, 7,...
and an upper roller 8 are provided, and the endless track track 4 is guided by each of these rollers 7 and 8.

The side frame 5 is a side frame main body part 9
and a sprocket mounting portion 11 fixed to one end of the side frame body portion 9 by welding via a connecting member 10, and the sprocket mounting portion 11 supports the sprocket 2. A slit 12 is formed at the other end of the side frame body 9, and the idler 3 is fitted into the slit 12. As shown in FIG. 3, the cross-sectional shape of the side frame main body 9 consists of a frame 13 formed in a substantially U-shape, and a support plate 14 fixed to the lower end of the frame 13. A lower roller 7 is held between the plates 14. Further, as shown in FIG. 4, a support member 15 for supporting the rotating shaft 3A of the idler 3 is installed in the portion of the side frame main body portion 9 where the slit 12 is formed.

The conventional tracked vehicle has the above-mentioned configuration, and since the upper part of the frame body portion 9 forming the side frame 5 is flat, it does not adhere to the tracked track 4 when the traveling vehicle runs or changes direction. The collected dirt, mud, etc. are shaken off by the upper roller 8 and deposited on the frame main body 9. In particular, a large amount of earth and sand accumulates in the gap between the upper roller 8 and the frame body 9 in the frame body 9 . On the other hand, since a support member 15 for supporting the rotation shaft 3A of the idler 3 is installed inside the idler 3 attachment part where the slit 12 is formed in the side frame main body part 9, the shape of the frame 13 in this part is changed. There are certain restrictions, and for this reason, it has been impossible to change the shape of the frame 13 of the frame main body 9 to one that facilitates mud drainage. For this reason, the above-mentioned accumulated earth and sand has been removed by successive scraping or the like. In particular, if dirt accumulates in the gap between the upper roller 8 and the frame main body 9, the upper roller 8 will become unable to rotate and cause abnormal wear, so it is necessary to remove the dirt that accumulates in this area. It was extremely troublesome. Moreover, since this gap is narrow, it is not easy to scrape out the earth and sand, and especially in cold regions, the accumulated earth and sand freezes, making removal work extremely difficult.

The present invention was developed in view of the above-mentioned drawbacks of the prior art, and by dividing the side frame into three parts, it is possible to easily manufacture and process each part individually, as well as weld and assemble the whole. An object of the present invention is to provide a tracked running body which improves the mud removal property of a roller mounting part where rollers are mounted, and improves the workability of removing earth and sand, especially in a cold region.

In order to achieve this objective, the configuration adopted by the present invention includes a side frame, a sprocket and an idler provided at both ends of the side frame, and an endless track wound between the sprocket and the idler. In a tracked vehicle having a crawler track and a guide roller provided on the side frame to guide the track crawler, the side frame is provided with a sprocket mounting portion to which the sprocket is attached, and an idler mounting portion to which the idler is attached. and a roller mounting part provided between the sprocket mounting part and the idler mounting part and to which the guide roller is mounted, and both ends of the roller mounting part and the sprocket mounting part and the idler mounting part. The joints of the rollers are connected and fixed by welding means through connecting members, and furthermore, in order to improve mud removal properties of the roller mounting part, the cross-sectional shape of the roller mounting part is made to fall diagonally from the center of the upper surface. It is characterized by being formed in the shape of a mountain with an inclined part.

With this configuration, it is possible to manufacture and process the side frame as a sprocket mounting portion, an idler mounting portion, and a roller mounting portion, each as a single item. In addition, since the cross-sectional shape of the roller mounting part is shaped to have an inclined part that falls diagonally from the center of the upper surface, even if the dirt adhering to the endless track is shaken off by the upper roller, it will not fall off the inclined part. It naturally falls downward, improving mud removal.

Hereinafter, embodiments of the present invention will be described based on FIGS. 5 to 9.

In this figure, the same components as in FIGS. 1 and 2 are given the same reference numerals, and their explanations will be omitted. 21 is a side frame, and the side frame 21 consists of a sprocket mounting part 22 to which the sprocket 2 is mounted, a roller mounting part 23 to which the upper and lower rollers 7 and 8 are mounted, and an idler mounting part 24 to which the idler 3 is mounted. It is. Connecting members 2 are provided at both ends of the roller mounting portion 23.
5 and 26 are fixed by welding means, and a sprocket mounting portion 22 and an idler mounting portion 24 are fixed to the other surfaces of each of the connecting members 25 and 26 by welding means. The connecting members 25 and 26 are larger than any of the sprocket mounting portion 22, the roller mounting portion 23, and the idler mounting portion 24.

As shown in FIG. 7, the cross-sectional shape of the frame 23A constituting the roller mounting portion 23 is designed so that the upper surface portion to which the upper roller 8 is mounted is made as narrow as possible to improve mud drainage. The sloped surface slopes downward from the center of the upper surface toward the outside, forming an approximately trapezoidal mountain shape.

The tracked vehicle according to this embodiment has the above-mentioned configuration, and the cross-sectional shape of the frame 23A of the roller mounting portion 23 constituting the side frame 21 is similar to that of other sprocket mounting portions 22 and idler mounting portions. 24, it has a trapezoidal mountain shape as shown in FIG. Therefore, the upper roller 8 is disposed so as to almost protrude from the upper surface of the frame 23A, and even if the earth and sand adhering to the endless track track 4 are shaken off by the upper roller 8, the earth and sand will not stand diagonally downward. It falls downward from a descending slope and does not accumulate on the upper surface. For this reason, unlike the prior art, the upper roller 8
It is possible to prevent a situation where the upper roller 8 becomes unable to rotate due to accumulation of earth and sand in the vicinity and causes premature wear.

The side frame 21 also has a sprocket mounting portion 22, a roller mounting portion 23, and an idler mounting portion 24.
Since it consists of two parts, these can be manufactured and processed as a single item, and in the end, they only need to be connected and fixed by welding means via the connecting members 25 and 26, so welding, assembly, etc. It can also improve sex.

Note that the frame of the roller attachment portion is not limited to the shape shown in the seventh example, but may have any other shape.
For example, as in the second embodiment shown in FIG. 8, a protrusion is formed at the center of the upper surface of the frame 33A of the roller mounting portion 33, and an inclined surface is formed falling from the protrusion to the left and right. If the pentagonal mountain shape is used, the earth and sand will be guided along the slope and fall downward to the left and right, so that almost no earth and sand will accumulate on the roller mounting portion 33.

Further, as in the third embodiment shown in FIG. 9, the frame 43A of the roller mounting portion 43 is formed into a horseshoe shape or a round mountain shape with an inclined surface that descends from the center of the upper surface in a convexly curved shape to the left and right. However, as in the second embodiment, the earth and sand are guided along the convex curved slope and fall downward to the left and right, so no earth and sand accumulates on the roller mounting portion 43.

As described above in detail, according to the tracked vehicle according to the present invention, the side frame is divided into three parts: a sprocket mounting part, a roller mounting part, and an idler mounting part, and these parts are welded together via a connecting member. The cross-sectional shape of the roller mounting portion is formed into a mountain shape having an inclined portion diagonally falling from the center portion of the upper surface, regardless of the sprocket mounting portion and the idler mounting portion.
The earth and sand shaken off from the endless track by the upper roller falls naturally along the slope, preventing the earth and sand from accumulating on the upper surface of the roller mounting part, making the upper roller unable to rotate and causing abnormal wear. The present invention prevents situations that would otherwise occur, and also simplifies soil removal work, especially in cold regions. Furthermore, since the side frame is divided into three parts and these parts are connected and fixed by welding means through connecting members, it is easy to manufacture and process each component separately, and welding and assembly of the whole part is easy. It has various effects such as improved sexual performance.

[Brief explanation of the drawing]

1 to 4 show a tracked vehicle according to the prior art, in which FIG. 1 is an external view, FIG. 2 is a cross-sectional view of FIG. 5 and 4 are cross-sectional views in the directions indicated by the - and - arrows in FIG. 2, respectively, and FIGS. 6 is an external view, and FIG. 6 is a sectional view in the direction indicated by the − arrow in FIG. 5, with the endless tracks omitted.
7 is a sectional view in the direction of the arrow in FIG. 6, and FIGS. 8 and 9 are cross-sectional views showing the second and third embodiments of the present invention.
It is a sectional view similar to the figure. 1... Track running body, 2... Sprocket,
3... Idler, 4... Track crawler, 7... Lower roller, 8... Upper roller, 21... Side frame, 22... Sprocket mounting part, 23... Roller mounting part, 24... Idler mounting part , 25, 26
...Connection member.

Claims (1)

[Scope of utility model registration request] a side frame, a sprocket and an idler provided at both ends of the side frame, a track crawler wound around the sprocket and the idler, and a track track provided on the side frame to guide the track track. In the tracked traveling body having a guide roller, the side frame is provided between a sprocket mounting part to which the sprocket is attached, an idler mounting part to which the idler is attached, and the sprocket mounting part and the idler mounting part. and a roller mounting part to which the guide roller is mounted, and the connecting parts between both ends of the roller mounting part and the sprocket mounting part and the idler mounting part are respectively connected and fixed by welding means via connecting members. Further, in order to improve the mud removal property of the roller mounting part, the cross-sectional shape of the roller mounting part is formed in the shape of a mountain having an inclined part diagonally falling from the center part of the upper surface. Running body.