JP3765323B2 - Track tension adjuster - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a crawler belt tension adjusting device provided on a track frame of a crawler type traveling vehicle.
[0002]
[Prior art]
Conventionally, the track frame 10 of the crawler type traveling vehicle shown in FIG. 1 normally incorporates a tension adjusting device for the crawler belt 31 that uses a coil spring as the elastic body 50, and FIG. .
The elastic body 50 has a large size when the guide wheel 30 collides with a large rock when a foreign object such as a rock is caught between the crawler belt 31 on which the vehicle runs and the starting wheel or guide wheel, or during high-speed movement. When an impact force is applied, the elastic body 50 contracts, thereby preventing the crawler belt 31 from tearing and the track frame 10 from being damaged.
Furthermore, in order to prevent slack of the crawler belt 31 due to the vehicle's own weight on the slope, it is set in advance by a force equivalent to the component in the inclination direction due to the vehicle's own weight at the maximum inclination angle, and an external force greater than this set force is applied for the first time. The elastic body can shrink.
The tension adjusting device shown in FIG. 2 is hydraulic, and an iron crawler belt 31 (or a rubber crawler belt) is wound around the outer periphery of the guide wheel 30.
The rotating shaft 32 is supported by the guide wheel by a support member 41, the right end surface of the support member 41 is fixed to a support member 42 provided with a hole 43 in the center, and the outer periphery of the support member 42 is an inner cavity wall of the track frame 10. The shaft 44 penetrates through the hole 43 and a nut 45 is attached to the left shaft end screw 44c.
A first cylinder 44a having a flange 44b is formed on the right side of the shaft 44, and an elastic body 50 made of a coil spring is inserted between the support member 42 and the flange 44b.
A piston 46 is fitted in the first cylinder 44a. The piston 46 has a through hole 46a inside, and a flange 46b provided on the right outer periphery is supported by a wall 48 inside the track frame 10. . The support member 42, the shaft 44, and the elastic body 50 are temporarily assembled outside before being assembled into the track frame 10, and then the elastic body 50 is compressed by a predetermined amount by a press, and the nut 45 is fixed and set. The piston is fitted to the fixed member and the support member 41 is fixed, and then, the track is pushed into the cavity of the track frame 10 and the crawler belt 31 is wound. Then, grease is injected from the oil supply valve 47 so that the tension of the crawler belt 31 is adjusted.
[0003]
[Problems to be solved by the invention]
However, the conventional tension adjusting device for the crawler belt 31 is a device premised on the use of an iron crawler belt. Then, since the rubber crawler belt itself is an elastic body, even if the crawler belt 31 is bitten, it is difficult for the rubber crawler belt to stretch and tear.
Moreover, when the crawler type traveling vehicle is a hydraulic excavating machine, unlike a vehicle capable of high speed traveling such as a bulldozer, it does not have a low speed traveling performance, so the guide wheel 30 collides with a foreign object and an opportunity to generate a large impact. There are few.
Further, if the excavator is a small excavator, the crawler belt 31 is small in weight and has little slack of the crawler belt 31 on an inclined ground.
That is, in the crawler type traveling vehicle of the rubber crawler belt, the elastic body 50 of the front and rear adjustment device for the guide wheel 30 may be omitted.
However, there are many work sites where rubber crawler belts cannot be installed.For example, rubber crawler belts cannot be used at high temperature processing sites, and use of rubber crawler belts with high wear is not suitable at quarries. In vehicles that move between sites, there are cases where it is not possible to cope with rubber crawlers alone.
Then, it becomes a subject to make it easy to replace the rubber crawler belt with the iron crawler belt.
[0004]
[Means for solving the problems and effects]
The present invention has been made in order to address the above-described problems. The invention described in claim 1 includes a front and rear adjustment mechanism (hereinafter referred to as a tension adjustment device) for the guide wheel (30) in the track frame (10). In the crawler type traveling vehicle in which the rubber or iron crawler belt (31) is replaceable, the elastic body (50) of the tension adjusting device of the crawler belt (31) is detachable, and the elastic body (50) or two while secured to the support member (42) of the wheel induces split members (60) (30) is inserted with the elastic body (50) is fixed in the to the support member 20 percent members (60) (42) releasing the, or if you remove the elastic body (50), and wherein the 20 percent member (60) to fix said supporting member (42), when replacing the rubber crawler to the iron crawler belt, an elastic body (50 ) fitted with said so as to release the fixation of the the support member (42) of 20 percent member (60), also when replacing the iron crawler to the rubber crawler, Remove the serial elastic body (50), using a first cylinder (44a), and fitted with a shaft (44) around the 20 percent member (60), fixed with bolts (61), the support member (42) The first cylinder (44a) is supported so as not to slide.
In the invention described in claim 2, the track frame (10) has a front and rear adjustment mechanism ( hereinafter referred to as a tension adjusting device ) of the guide wheel (30 ) so that the rubber or iron crawler belt (31) can be replaced. in the crawler traveling vehicle, desorption and a first cylinder having an axis (44) which習動with fitted elastic body tensioning device (50) to the support member (42) of the track (31) (44a) The second cylinder (62 ) that is freely fixed and does not slide on the support member (42) without the elastic body (50) and the first cylinder (44a) or the shaft (44) . ) Is fixed to the support member (42 ) of the guide wheel (30) , and when the rubber crawler belt is replaced with the iron crawler belt, the elastic body (50) and the first cylinder (44a) are attached, and the second cylinder is attached. so as to release the fixation of the the support member (42) in (62), also when replacing the iron crawler to the rubber track, said elastic body (50) and the first cylinder (44a) Remove, and with the support member (42) and fixed to support the structure second cylinder (62) and so as not to slide by using the second cylinder (62).
With the above-described configurations, when the elastic body is attached to the track frame as well as when the elastic body is removed from the track frame, the guide wheel support member is supported by the track frame via the tension adjusting device. Therefore, the tension of the crawler belt can be optimally adjusted by adjusting the guide wheel to the set position with the adjusting device without the elastic body. When the elastic body is attached to the track frame, an iron crawler belt can be attached (of course, a rubber crawler belt may be attached). On the other hand, when the elastic body is removed from the track frame, only the rubber crawler belt can be attached. Thus, the iron crawler belt and the rubber crawler belt can be easily changed as necessary.
In addition, this configuration allows rubber crawler dedicated vehicles to be replaced with iron crawler belts, use rubber crawlers on public roads where noise avoidance areas and road surfaces should not be damaged, high temperature noro treatment site, When moving including quarries and these sites, it is possible to easily change to iron crawlers and operate.
Further, with this configuration, it is possible to change to a hydraulic tension adjusting device dedicated to a rubber crawler belt that uses a cylinder as an adjusting mechanism by removing an elastic body without changing the structure of the track frame.
[0005]
According to a third aspect of the invention, it has a longitudinal adjustment mechanism of induction ring (30) to the track frame (10) (hereinafter referred to as tensioning device), crawler traveling that enables exchange track (31) of rubber or iron In the vehicle, the elastic body (50) of the tension adjusting device for the crawler belt (31) , the first cylinder (44a) , the nut (45) , the piston (46) , and the oil supply valve (47) are detachable, and the elastic The body (50) , the first cylinder (44a) , the nut (45) , the piston (46) , the oil / fat supply valve (47) or the turnbuckle (70) are fixed to the support member (42) of the guide wheel (30). In addition, when replacing the rubber crawler belt with the iron crawler belt, the elastic body (50) , the first cylinder (44a) , the nut (45) , the piston (46) , the oil supply valve (47) are attached, and the turnbuckle ( 70) is released from the support member (42) , and when the iron crawler belt is replaced with a rubber crawler belt, the elastic body (50) and the first cylinder (44) a) The nut (45) , the piston (46) , and the oil / fat supply valve (47) are removed, and the turnbuckle (70) is used.
Similarly to the above, this configuration can also be changed to a thread tension adjusting device dedicated to a rubber crawler belt using a turnbuckle as an adjusting mechanism by removing an elastic member without changing the structure of the track frame.
[0009]
According to these configurations, even if the structure is changed without changing the structure of the track frame, the track dedicated to the rubber crawler belt without the elastic body can be obtained simply by fixing the support member to the inner cavity wall of the track frame. A frame can be used, which is extremely advantageous in terms of manufacturing and changing clothes.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 3 shows the first embodiment, FIG. 4 shows the second embodiment, and FIG. 5 shows the third embodiment. The components used in addition to the crawler belt tension adjusting device are the same as those in the prior art. Therefore, description will be made with the same reference numerals as those of the prior art.
In contrast to the structure described in the prior art, the first embodiment shown in FIG. 3 shows that the elastic body 50 is removed from the track frame 10, that is, when the rubber crawler belt is used without using the iron crawler belt. The bisecting member 60 is fitted around the shaft 44 and fixed with bolts 61 so that the left and right end faces abut against the support member 42 and the first cylinder 44a.
The bisecting member 60 may be made longer so that the support member 42 and the flange 46b come into contact with each other. This first embodiment is performed by injecting grease into the oil supply valve 47 as in the conventional tension adjusting device.
[0011]
In the second embodiment shown in FIG. 4, in addition to removing the elastic body 50, the first cylinder 44 a is replaced with the second cylinder 62. Functionally, it has almost the same structure as that of the first embodiment, and tension adjustment is performed by injecting grease into the oil supply valve 47, which is used in place of the elastic body 50 in the first embodiment. The split member 60 and the bolt 61 are unnecessary.
[0012]
In the third embodiment shown in FIG. 5, the elastic body 50, the first cylinder 44a, the nut 45, the piston 46, and the oil supply valve 47 are removed from the tension adjusting device for the iron crawler belt, and the set using the turnbuckle 70 is used. This is a screw-type crawler belt tension adjustment device replaced by.
[0014]
According to the plurality of embodiments described above, the rubber crawler of the excavating machine to which the rubber crawler is initially attached is removed, mainly when the iron crawler is attached, and conversely, when the iron crawler is removed and the rubber crawler is attached. The elastic body of the tension adjusting device can be removed from the track frame so that it can be changed. The tension adjusting part can be attached to the track frame.
Needless to say, such changing of clothes is suitable for a hydraulic excavating machine in which a crawler traveling vehicle can travel at a low speed and has a low weight.
[Brief description of the drawings]
FIG. 1 is an inclined view of a track frame.
FIG. 2 is a side sectional view of a tension adjusting device using an elastic body.
FIG. 3 is a cross-sectional view of a first embodiment of a tension adjusting device without an elastic body.
FIG. 4 is a sectional view of a second embodiment of a tension adjusting device without an elastic body.
FIG. 5 is a sectional view of a third embodiment of a tension adjusting device without an elastic body.
[Explanation of symbols]
10 track frame
11 Support member
30 guide wheel
31 tracks
42 Support member
44 axes
44a First cylinder
45 nut
46 Piston
47 Oil supply valve
50 Elastic body
60 volts
62 second cylinder
70 turnbuckle

Claims (3)

In a track-type traveling vehicle having a front and rear adjustment mechanism (hereinafter referred to as a tension adjustment device) of the guide wheel (30) in the track frame (10) and capable of replacing the rubber or iron crawler belt (31),
The elastic body (50) of the tension adjusting device for the crawler belt (31) is detachable, and the elastic body (50) or the split member (60) is fixed to the support member (42) of the guide wheel (30). ,
When replacing the rubber crawler belt with the iron crawler belt, attach the elastic body (50) and release the fixing of the split member (60) to the support member (42) ,
When replacing the iron crawler belt with the rubber crawler belt, the elastic body (50) is removed, the first cylinder (44a) is used, the split member (60) is fitted around the shaft (44), and the bolt (61) A crawler belt tension adjusting device having a configuration in which the support member (42) and the first cylinder (44a) are supported so as not to slide. Track frame (Ten) Induction wheel (30) Front / rear adjustment mechanism ( Hereinafter referred to as tension adjustment device ) Rubber or iron crawler track (31) In a crawler type traveling vehicle that can be exchanged,
The track (31) Elastic body of tension adjusting device (50) And support members (42) Axis to be inserted and learned (44) First cylinder having (44a) And the elastic body (50) And the first cylinder (44a) Or the axis (44) Without the support member (42) The second cylinder fixed so as not to slide (62) Induction wheel (30) Said support member (42) And fixed to
When replacing rubber track with iron track, elastic body (50) And the first cylinder (44a) And the second cylinder (62) Said support member (42) So that it ’s unpinned to
When replacing an iron crawler belt with a rubber crawler belt, (50) And the first cylinder (44a) And removing the second cylinder (62) Using said support member (42) And the second cylinder (62) A crawler belt tension adjustment device that is fixed and supported so as not to slide. Has a longitudinal adjustment mechanism of induction ring (30) to the track frame (10) (hereinafter referred to as tensioning device), the crawler traveling vehicle that enables exchange track (31) of rubber or iron,
The elastic body (50 ) of the tension adjusting device of the crawler belt (31) , the first cylinder (44a) , the nut (45) , the piston (46) , and the oil / fat supply valve (47) are detachable, and the elastic body (50 ) , First cylinder (44a) , nut (45) , piston (46) , oil supply valve (47), or While fixing the turnbuckle (70) to the support member (42) of the guide wheel (30) ,
When replacing the rubber crawler to the iron track, the elastic body (50), the first cylinder (44a), a nut (45), the piston (46), oil supply valve (47) mounted, the turn buckle (70) So as to release the fixing to the support member (42) ,
When the iron crawler belt is replaced with the rubber crawler belt, the elastic body (50) , the first cylinder (44a) , the nut (45) , the piston (46) , and the oil supply valve (47) are removed, and the turnbuckle (70) is removed. screw type track tension adjusting device was used.

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