JPH09104372A - Upper part running mounting structure of crawler type running body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce noises generated from a crawler when a running body with it is running by making the mounting position in the upper part of a truck frame, where the upper rollers are installed, so as to be movable for adjustment in the longitudinal direction of the truck frame. SOLUTION: A pedestal 24 is furnished in the upper part of a truck frame 16 as stretching in the longitudinal direction, and bolt holes 31 are bored in the top plate 26 of the pedestal 24. The top plate 26 is furnished with a long hole 32 to admit bolt insertion in such a way as stretching in the longitudinal direction of the truck frame 16 to serve as a guide plate, and a flange 23 is formed at the bottom of a support 22 to support upper rollers 19, and bolts 28, 29 are inserted through the flange 23, holes 31, and the long hole 32. Thereby the mounting position of the upper rollers 19 in the upper part of the truck frame 16 is made movable for adjustment to any required position on the pedestal 24 in the longitudinal direction of the truck frame 16 by means of slackening of the bolts 28, 29, and after adjustment, they 28, 29 are fastened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to an upper roller mounting structure for a crawler type traveling body of a construction machine such as a hydraulic excavator.

[0002]

2. Description of the Related Art FIG. 6 shows a crawler type traveling body (Japanese Utility Model Laid-Open No. Sho 63-12981 / 1988).
Although it is referred to as a track-mounted lower traveling body in Japanese Patent No. 82981, it is a side view of a crawler type traveling body 1). In the figure, 2 is a pair of left and right track frames, 3
Is an idler provided at the front end of the track frame 2, 4 is an idler shaft, 5 is a fork end, 6 is a connector portion of the fork end 5, 7 is a sprocket wheel provided at the rear end of the track frame 2, and 8 is an upper roll. Wheels, 9 are lower rollers, 10 are crawlers, 11 are roller supports standing on the upper surface of the connector portion 6, 12 are roller supports standing on the rear side upper surface of the track frame 2, and 13 and 14 are rollers respectively. It is a roller for noise reduction mounted on the upper part of the supports 11 and 12.

[0003]

In the crawler type traveling body 1 of the hydraulic excavator shown in FIG. 6, an idler 3 is provided at the front end of the track frame 2 and a sprocket wheel 7 is provided at the rear end.
, A single upper roller 8 is arranged on the upper side, and a plurality of lower roller 9 is arranged on the lower side, and a crawler 10 is wound around the outer peripheral sides of the wheels 3, 7, 8.9, and crawler type traveling is performed. In order to reduce the metal hammering sound that accompanies the waving phenomenon of the crawler 10 on the upper side generated when the body 1 travels, the upper roller 8
Of the crawler 10 between the upper roller 8 and the sprocket wheel 7, respectively.
It is supported by 3,14. However, the metal impact sound of the crawler during running may be increased due to a change in weight of the crawler 10 to which mud adheres or a change in running vibration when the crawler 10 is replaced with a crawler having a different width dimension. In this case, even if an attempt was made to move the crawler supporting positions of the rollers 13 and 14 to make noise reduction adjustment, it was not possible. Also, the roller support 11 and the roller 1
3 to the idler 3, the roller support 12 and the roller 14
Since they are fixed in close proximity to the sprocket wheels 7, it is difficult to clean the mud and the like accumulated on the upper surface side of the track frame 2 when scraped off with a scoop or the like. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide an upper roller mounting structure in which the mounting position of the upper roller can be moved and displaced without newly providing a noise reducing roller.

[0004]

According to the present invention, a pair of left and right track frames has an idler at the front end, a sprocket wheel at the rear end, a single or a plurality of upper rolling wheels at the upper portion, and a plurality of upper rolling wheels at the lower portion. In the crawler-type traveling body in which the lower wheels are arranged and the crawlers are wound around these outer peripheral sides, a pedestal is provided along the longitudinal direction on the upper part of the track frame, and a bolt hole is formed on the top plate of the pedestal. And a long hole for bolts in the longitudinal direction of the track frame as a guide part on the upper plate of the pedestal, and a flange at the lower end of the support for supporting the upper rolling wheel. Insert the bolts for tightening the support through the holes for bolts and the long holes for bolts opened on the top plate of, and attach the upper roller on the upper part of the track frame.
It is possible to adjust and move to a desired position of the pedestal in the longitudinal direction of the track frame. Accordingly, when the upper wheel is adjusted and moved, the bolts inserted in the bolt holes of the upper plate of the pedestal are loosened and removed, and the bolts inserted in the elongated bolt holes of the upper plate are only loosened. Then, move the support that supports the upper roller to the required position on the pedestal along the bolt holes, that is, along the longitudinal direction of the track frame, and tighten the flange at the lower end of the support to the pedestal with the following bolts. Fix it. Therefore, it is possible to reduce the running noise of the crawler by moving the mounting position of the upper roller.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of a crawler type traveling body 15 having an upper roller mounting structure of the present invention. In the figure, 16 is a track frame, 17 is an idler,
18 is a sprocket wheel, 19 is two upper wheels,
Reference numeral 20 is a plurality of lower rollers, 21 is a crawler, 22 is a support for supporting the upper rollers 19, 23 is a flange at the lower end of the support 22, and 24 is a pedestal welded to the upper portion of the track frame 16. FIG. 2 is a cross-sectional view of a main part taken along line AA of FIG. In the figure, 25 is a hole for inserting an upper wheel shaft (not shown) of the support 22, 26 is a top plate of the pedestal 24, 27 is a spacer plate, 28 and 29 are bolts respectively, 30 is a square nut for the bolt 28. , A, and b are detent portions of the square nut 30. FIG. 3 is a plan view of relevant parts showing the upper roller mounting structure as viewed from BB in FIG. 1. In the figure, 31 is a plurality of bolt holes (specifically, screw holes for bolts) opened in the upper surface plate 26 of the pedestal 24, 32
Is a long hole for bolts. FIG. 4 is an enlarged view of a portion C in FIG. FIG. 5 is a side view of essential parts showing the adjustment movement amount S of the upper roller 19.

Next, the upper roller mounting structure of the present invention is shown in FIGS.
Referring to FIG. In the present invention, the track frame 1
6 in the longitudinal direction (ie track frame 1
6, a pedestal 24 is provided (by welding), a bolt hole (specifically, a bolt screw hole) 31 is opened in the upper surface plate 26 of the pedestal 24, and on the pedestal 24 As the guide plate on the face plate 26, the slot 32 for the bolt in the longitudinal direction of the track frame 16 is formed, and the flange 23 is formed at the lower end of the support 22 that supports the upper roller 19.
Bolts 28, 29 are formed in the flange 23, the bolt hole 31 and the bolt slot 32 of the upper plate 26 of the pedestal 24.
The mounting position of the upper roller 19 on the upper part of the track frame 16 can be adjusted and moved to a desired position of the pedestal 24 in the longitudinal direction of the track frame 16.

Next, the operation of the upper roller mounting structure of the present invention will be described. In the present invention, when the upper roller 19 is adjusted and moved, the bolt hole 3 of the upper surface plate 26 of the pedestal 24 is moved.
1. Loosen and remove the bolt 29 attached to the upper plate 1 and the upper plate 2
The bolt 28 inserted into the bolt slot 32 of 6 is only loosened. Then, the support 22 is moved to the desired position of the pedestal 24 along the bolt long hole 22, that is, along the longitudinal direction of the track frame 16, and the support 2 is moved.
2 The flange 23 at the lower end is fastened and fixed to the pedestal 24 with the bolts 28 and 29. Therefore, it is possible to reduce the running noise of the crawler by moving the mounting position of the upper roller 19 without newly providing a noise reducing roller. Further, it is possible to easily scrape off the mud and the like accumulated on the upper surface side of the track frame 16 with a scoop or the like, and move and displace the support 22 for sufficient cleaning.

[0008]

In the crawler type traveling body having the upper roller mounting structure of the present invention, when the upper roller is adjusted and moved, the bolts inserted into the bolt holes of the upper plate of the pedestal are loosened and removed. Only loosen the bolts that are inserted into the long holes for bolts on the top plate. Then, move the support that supports the upper roller to the required position on the pedestal along the bolt holes, that is, along the longitudinal direction of the track frame, and tighten the flange at the lower end of the support to the pedestal with the following bolts. Fix it. Therefore, in the present invention, it is possible to reduce the running noise of the crawler by moving the mounting position of the upper roller without newly providing a noise reducing roller. In addition, when scraping off mud accumulated on the upper surface of the track frame, the support can be moved and displaced for sufficient cleaning.

[Brief description of the drawings]

FIG. 1 is a side view of a crawler type traveling body having an upper roller mounting structure of the present invention.

FIG. 2 is a cross-sectional view of a main part viewed from AA in FIG.

FIG. 3 is a plan view of relevant parts showing the upper roller mounting structure as seen from BB in FIG. 1.

FIG. 4 is an enlarged view of portion C in FIG.

FIG. 5 is a side view of a main portion showing an adjustment movement amount of an upper roller.

FIG. 6 is a side view of a crawler type traveling body according to an embodiment of the prior art.

[Explanation of symbols]

 1,15 Crawler type traveling body 2,16 Track frame 3,17 Idler 7,18 Sprocket wheel 8,19 Upper rolling wheel 9,20 Lower rolling wheel 10,21 Crawler 22 Support 23 Flange 24 Pedestal 26 Top plate 28,29 Bolt 31 Bolt Hole 32 Bolt Oblong Hole

Claims (5)

[Claims] 1. A pair of left and right track frames has an idler at the front ends thereof, a sprocket wheel at the rear ends thereof, a single or a plurality of upper rolling wheels at the upper portion, and a plurality of lower rolling wheels at the lower portion, In the crawler type traveling body which crawls around these outer peripheral sides, the mounting position of the upper roller on the upper part of the track frame can be adjusted and moved in the longitudinal direction of the track frame. Upper roller mounting structure for the running body. 2. The upper roller mounting structure for a crawler-type traveling body according to claim 1, wherein a pedestal is provided on an upper portion of the track frame along a longitudinal direction thereof, and the upper portion is provided at a predetermined position on the pedestal. An upper roller mounting structure for a crawler-type traveling body, characterized in that a lower end of a support for supporting the roller is fixedly mounted. 3. The upper roller mounting structure for a crawler-type traveling body according to claim 1, wherein a bolt hole is opened in the pedestal, and a flange is formed in the support. The upper roller mounting structure for the crawler type traveling body is characterized in that the above-mentioned is bolted to the pedestal. 4. The upper roller mounting structure for a crawler type traveling body according to claim 1, further comprising a guide portion for adjusting and moving the support along the longitudinal direction of the track frame. An upper roller mounting structure for a crawler type running body. 5. The upper roller mounting structure for a crawler-type traveling body according to claim 4, wherein an elongated hole for a bolt in the longitudinal direction of the track frame is formed in the upper plate of the pedestal, and the elongated hole is formed in the elongated hole. An upper roller mounting structure for a crawler-type traveling body, characterized in that a bolt for tightening a support is inserted to tighten the support to a pedestal.