JPH10100951A - Undercarriage of tracked vehicle - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent a rock from colliding with a bearing portion of a lower roller or to prevent earth and sand from entering. SOLUTION: A guard plate 23 of a truck guard body 22.
A protective cover 27 is detachably attached to each of the notches 23A formed in the notch, and the notches 2 are formed by the protective cover 27.
It is configured to cover the bearing 11A of each lower roller 11 housed in 3A. Accordingly, it is possible to reliably prevent rocks or the like from colliding with the bearing 11A at the time of traveling or excavation work of the tracked vehicle, or to prevent earth and sand or the like caught in the crawler belt 9 from entering the bearing 11A at the time of traveling. As a result, each lower roller 11 can always be smoothly rotated, and the running stability of the tracked vehicle can be guaranteed for a long period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower traveling body of a tracked vehicle suitable for use in a tracked vehicle driven and driven by a crawler belt, such as a hydraulic shovel and a hydraulic crane.

[0002]

2. Description of the Related Art Generally, tracked vehicles such as hydraulic shovels and hydraulic cranes are provided at both front and rear ends of left and right side frames as described in, for example, JP-A-5-305882. A track frame having a driving wheel and an idler wheel, a crawler belt wound between the drive wheel and the idler wheel of the track frame, and respective side frames for guiding the crawler belt between the drive wheel and the idler wheel. A plurality of lower rollers provided on the lower surface side of the vehicle and a track guard attached to the lower surface side of each side frame in order to prevent the crawler belt from being displaced leftward and rightward with respect to each lower roller. Undercarriage.

[0003] In view of this, a lower traveling body of this kind of conventional tracked vehicle is applied to a hydraulic shovel in FIG.
12 is described below with reference to FIG.
Reference numeral 2 denotes an upper revolving unit which is rotatably mounted on the lower traveling unit 1 via a revolving wheel (not shown), and a working device 3 is attached to a front portion of the upper revolving unit 2 so as to be able to move up and down. Have been.

[0004] Reference numeral 4 denotes a track frame of the undercarriage 1. The track frame 4 has a center frame 5 having a round body at the center thereof, and a left and right center frame 5.
It is provided with a pair of side frames 6 (only one side is shown) provided on both right sides and extending in the front and rear directions. Each of the side frames 6 has left and right side plate portions 6A,
6A, and an upper plate (not shown) connecting the upper ends of the side plates 6A in the left and right directions. At the lower end side of each side plate portion 6A, a mounting flange 6B to which a bearing 11A of each lower roller 11 and a track guard 13 to be described later are mounted is provided extending forward and backward.

Reference numeral 7 denotes drive wheels provided at one end in the front and rear directions of each side frame 6, and the drive wheels 7 are rotationally driven by a traveling motor (not shown) to drive a crawler belt 9 described later. Is what you do. Reference numeral 8 denotes an idler wheel provided opposite to the drive wheel 7 at the other end in the front and rear directions of each side frame 6, and the idler wheel 8 follows the rotation of the crawler belt 9 when the lower traveling body 1 travels. It rotates.

Reference numeral 9 denotes a crawler belt wound between the driving wheel 7 and the idler wheel 8. The crawler belt 9 includes a pair of track links 9A, 9A separated to the left and right, and each of the track links 9A. An assembly consisting of a plate-like shoe 9B fixed to each of the track links 9A so as to be connected is connected endlessly.

Reference numerals 10, 10,... Denote a plurality of upper rollers rotatably mounted on the upper side of each side frame 6. Each upper roller 10 rotates while sliding on the lower surface of each track link 9A of the crawler belt 9. Thus, the crawler belt 9 is supported above the side frame 6.

Reference numerals 11, 11,... Denote a plurality of lower rollers rotatably provided on the mounting flange 6B of the side frame 6. Each lower roller 11 is mounted by a bolt 12 as shown in FIGS. It is rotatably supported between left and right bearings 11A, 11A attached to the lower surface of the flange 6B.

Each lower roller 11 is provided with a pair of left and right flange-shaped stoppers 11 sandwiching each track link 9A of the crawler belt 9.
B, 11B, and a crawler belt 9 between the respective flange-shaped stoppers 11B.
By rotating while sliding on the upper surface of each track link 9A, the crawler belt 9 is guided below the side frame 6.

Reference numeral 13 denotes a track guard mounted on the lower surface of the side frame 6, and the track guard 13 connects a pair of left and right track guard bodies 14, 14 by a spacer 19 described later, as shown in FIG. It is constituted by doing. The left and right track guard main bodies 14 include a guard plate 15, a stopper 16, an intermediate bracket 17, a tip bracket 18, and the like, which will be described later.

Reference numeral 15 denotes a guard plate constituting the track guard main body 14, and the guard plate 15 extends forward and backward along the mounting flange 6B of the side frame 6. On the upper side of the guard plate 15, each bearing 1 of the lower roller 11 is provided.
A plurality of notches 15A, 15A,
Are formed at predetermined intervals.

Reference numeral 16 denotes a stopper fixed to the lower end of the guard plate 15. The stopper 16 has its upper surface welded to the lower end of the guard plate 15 and extends forward and backward. It is provided to protrude left and right.

Reference numerals 17, 17,... Denote intermediate brackets located between the notches 15A and welded to the guard plate 15. Each of the intermediate brackets 17 is formed as an inverted U-shaped frame as a whole. A bolt insertion hole 17A is formed in the upper surface.

Reference numeral 18 denotes a tip bracket welded to the tip side of the guard plate 15. The tip bracket 18 is formed as an inverted U-shaped frame longer than the intermediate bracket 17, and has a plurality of 18A are formed.

Each track guard body 14 is
By the left and right guard plates 15, spacers 19, 19,.
And the spacers 19 and the guard plates 15 are fastened to each other by bolts or the like, so that the spacers 19 and the guard plates 15 are integrated while maintaining a constant space in the left and right directions.

The left and right track guard bodies 14 constituting the track guard 13 accommodate the bearings 11A of the lower rollers 11 in the cutouts 15A of the guard plates 15, respectively. And the upper surface of the tip bracket 18 is attached to the mounting flange 6 of the side frame 6.
B on the lower surface, and the bolt insertion hole 17A of the intermediate bracket 17 and the bolt insertion hole 18A of the tip bracket 18
The lower roller 11 is attached to the lower surface side of the side frame 6 so as to sandwich each lower roller 11 from the left and right directions by screwing the bolt 20 inserted through the lower flange 11 to the attachment flange 6B.

The undercarriage 1 of the hydraulic excavator according to the prior art has the above-described structure, and the driving wheel 7 is rotated by the traveling motor so that the crawler belt 9 is driven between the driving wheel 7 and the idler wheel 8. Thereby, the lower traveling body 1 travels forward and backward. While the crawler belt 9 moves forward and backward, the upper roller 10 and the lower roller 11 rotate while sliding on the track links 9A of the crawler belt 9, and the crawler belt 9 is moved above and below the side frame 6. To guide.

At this time, the track guard 13 sandwiches each track link 9A of the crawler belt 9 from the left and right directions by the left and right track guard main bodies 14, so that the lower traveling body 1 can be moved at the time of traveling or excavation work. When a load acts on the track 9 from the lateral direction, the track link 9A of the track 9 moves to the left,
The rightward displacement is regulated to prevent the track links 9A from coming off the lower rollers 11.

[0019]

In the undercarriage 1 according to the prior art described above, the track guard body 1
A notch 15A for accommodating the bearing 11A of each lower roller 11 is formed in each guard plate 15 constituting the fourth roller 4. For this reason, the bearing 11A is exposed to the outside without being covered by the guard plate 15, and there is a problem that the bearing 11A is damaged by collision of rocks or the like during traveling or excavation work.

Further, when the crawler belt 9 travels or the like, the soil and the like caught in the crawler belt 9 enter the bearing 11A through the notch portion 15A of the guard plate 15, so that the smooth rotation of each lower roller 11 is hindered. However, there is a problem that running stability of the tracked vehicle is reduced.

On the other hand, for example, Japanese Utility Model Laid-Open Publication No.
Japanese Patent Application Laid-Open No. 7-74139 discloses a lower traveling body having a track guard integrated with a side frame in which a lower portion of a side plate of a side frame is extended vertically downward, and the extended portion covers a bearing of a lower roller.

However, in the structure in which the track guard is integrally formed with the side frame, for example, when the lower roller or the bearing is damaged, it is difficult to remove the track guard covering the lower roller or the like from the side frame, and the damaged lower roller or the bearing is damaged. There is a problem that workability at the time of replacing a roller or a bearing is poor.

The present invention has been made in view of the above-mentioned problems of the prior art, and prevents rocks from hitting the bearing portion of the lower roller or intrusion of earth and sand, thereby enabling the lower roller to rotate smoothly. An object of the present invention is to provide a lower traveling body of a tracked vehicle that can be guaranteed for a long time and can improve workability when replacing a lower roller and a bearing.

[0024]

In order to solve the above-mentioned problems, the present invention according to claim 1 comprises a track frame having driving wheels and idle wheels at both front and rear ends of left and right side frames, Crawler belts wound between driving wheels and idler wheels of the truck frame, and a plurality of crawler belts provided on the lower surface side of each side frame for guiding the crawler belts between the driving wheels and idler wheels. The lower roller and the lower roller are attached to and detached from the lower surface of each of the side frames so as to sandwich the lower roller from the left and the right in order to prevent the crawler belt from being displaced left and right with respect to the lower roller. The present invention is applied to a lower traveling body of a tracked vehicle including a track guard which is attached as possible.

A feature of the structure adopted in the first aspect of the present invention is that the track guard is provided extending forward and rearward of the side frame, and has a notch for accommodating a bearing portion of each of the lower rollers. The track guard body has a portion formed thereon, and a protective cover that is detachably provided at a position of each notch of the track guard body to cover the bearing portion of each of the lower rollers.

According to the above construction, the bearing of the lower roller accommodated in the notch of the track guard body is covered with the protective cover provided at the position of the notch, so that it can be used during traveling or excavation work. Sometimes, it is possible to prevent rocks and the like from colliding with the bearing portion to damage the bearing portion, and to prevent earth and sand from entering the bearing portion, and to ensure smooth rotation of the lower roller for a long period of time.

A feature of the structure adopted by the invention of claim 2 is that the track guard is divided into a plurality of parts in front and rear directions of the side frame, and is disposed between bearing portions of the lower rollers. The present invention comprises a plurality of track guard divisions and a protective cover which is detachably provided between the track guard divisions to cover the bearing portion of each lower roller.

According to the above configuration, the plurality of track guard divisions are connected to each other via the protection cover, and the bearing of the lower roller located between the track guard divisions is covered with the protection cover. Rocks and the like can be prevented from colliding with the bearing during traveling or excavation work, and earth and sand can be prevented from entering the bearing. In addition, by configuring the track guard from a plurality of track guard divisions provided between the lower rollers, the bearing portion of the lower roller can be attached and detached from between the track guard divisions, and the damaged lower roller or the damaged lower roller can be detached. Workability when replacing a bearing portion or the like can be greatly improved.

[0029]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG.

First, FIGS. 1 to 3 show a first embodiment according to the present invention.
Is shown. In the present embodiment, the same components as those of the above-described conventional technology are denoted by the same reference numerals, and description thereof will be omitted.

In the drawing, reference numeral 21 denotes a track guard according to the present embodiment mounted on the lower surface of the mounting flange 6B of the side frame 6, and the track guard 21 holds each lower roller 11 so as to sandwich each lower roller 11 from the left and right directions. Frame 6
Left and right track guard bodies 2 described later, which are provided to extend in front and rear directions and are connected by spacers 19.
2 and 22, and left and right protective covers 27 detachably attached to the respective track guard bodies 22.

Reference numerals 22 and 22 denote a pair of left and right track guard bodies removably mounted on the lower surface of the mounting flange 6B of the side frame 6, respectively.
Is similar to each track guard body 14 according to the prior art,
A guard plate 23 extending forward and backward along the mounting flange 6B of the side frame 6 and formed with a plurality of notches 23A, 23A,... For accommodating the bearing 11A of each lower roller 11; 24 fixed to the lower end of the
, And a plurality of intermediate brackets 25, 25,... Located between the notches 23A and welded to the guard plate 23, and a tip bracket 26 welded to the tip side of the guard plate 23.

Here, each intermediate bracket 25 is formed as an inverted U-shaped frame as a whole, and a bolt insertion hole 25A is formed in the upper surface of each intermediate bracket 25.
In addition, two screw holes 25B, 25B are screwed on the front and rear surfaces of each intermediate bracket 25, respectively, spaced apart upward and downward.

On the other hand, each end bracket 26 is formed as an inverted U-shaped frame body longer than the intermediate bracket 25, and has a plurality of bolt insertion holes 26A formed in the upper surface thereof. Further, two screw holes 26B, 26B corresponding to the screw holes 25B of the intermediate bracket 25 are screwed on the rear surface of each end bracket 26.

Then, the track guard main body 22 connects the bearing 11A of each lower roller 11 to the notch 23 of the guard plate 23.
A, the upper surfaces of the intermediate brackets 25 and the tip brackets 26 are brought into contact with the lower surfaces of the mounting flanges 6B of the side frames 6, and the bolt insertion holes 25A of the intermediate bracket 25 and the bolt insertion holes of the tip bracket 26 are accommodated. The bolt 20 inserted through 26A is attached to the mounting flange 6B.
By being screwed onto the side frame 6, it is attached to the lower surface side of the side frame 6.

, 27, 27,...
2 shows a plurality of protective covers constituting the track guard 21. Each of the protective covers 27 is made of a plate bent in a U-shape as shown in FIG. 2, and includes a pair of mounting surface portions 27A, 27A facing each other. And a rectangular closing surface portion 27B located between the mounting surface portions 27A. Further, two through holes 27C, 27C corresponding to the respective screw holes 25B screwed into the intermediate bracket 25 are bored in the mounting surface portion 27A so as to be separated upward and downward.

Each of the protective covers 27 sandwiches the front surface and the rear surface of one of the two adjacent intermediate brackets 25 with each mounting surface 27A, and attaches the bolt 28 inserted through each through hole 27C to the intermediate bracket 25. 25 screw holes 25
B is attached between the intermediate brackets 25 by being screwed to B. Similarly, a protective cover 27 is attached between the rear surface of the front bracket 26 and the front surface of the adjacent intermediate bracket 25.

Thus, between the intermediate brackets 25,
The notch 23A of the guard plate 23 located between the intermediate bracket 25 and the tip bracket 26 is closed by the closing surface 27B of the protective cover 27, and the bearing of each lower roller 11 housed in each notch 23A. 11A is configured to be covered by the closing surface 27B of the protective cover 27.

This embodiment has the above-described configuration, and the track guard 21 restricts the track link 9A of the crawler belt 9 from being displaced leftward and rightward during traveling of a tracked vehicle, for example. The basic operation for preventing the track link 9A from coming off from each lower roller 11 is not particularly different from that of the prior art.

According to the present embodiment, the notch 23A formed in the guard plate 23 constituting the track guard main body 22 is closed by the protective cover 27 detachably attached to the track guard main body 22. And the bearing 11A housed in the notch 23A.

This reliably prevents rocks and the like from colliding with the bearing 11A during running of the tracked vehicle or excavation work, and also prevents earth and sand caught in the crawler belt 9 from entering the bearing 11A during running. it can. As a result, each lower roller 11 can always be smoothly rotated, and the running stability of the tracked vehicle can be guaranteed for a long period of time.

Further, the rigidity of the entire track guard 21 can be improved by attaching the protective cover 27 between each intermediate bracket 25 of each track guard main body 22 and between the intermediate bracket 25 and the tip bracket 26.

Next, FIGS. 4 to 8 show a second embodiment according to the present invention.
Is shown. In the present embodiment, the first
The same reference numerals are given to the same components as those of the embodiment, and the description thereof will be omitted.

In the drawing, reference numeral 31 denotes a track guard according to the present embodiment mounted on the lower surface of the mounting flange 6B of the side frame 6, and the track guard 31 includes a plurality of track guard divided bodies 32 described below and the respective track guards. Each protective cover 27 is detachably attached between the divided bodies 32.

Reference numeral 32 denotes a track guard division body which is divided in front and rear directions of the side frame 6 and which is detachably attached to the lower surface of the attachment flange 6B so as to sandwich each lower roller 11 from the left and right directions. The guard split body 32 is shown in FIG.
, A plurality of intermediate divided bodies 32A, 32A,... (Only two are shown) which are located in the middle of the side frame 6 and are connected to form a pair on the left and right by spacers 36 described later; 2 which is located at the tip of the side frame 6 and is connected by a spacer 36 so as to form a pair on the left and right sides.
The track guard main body 22 according to the first embodiment is divided into a plurality of parts in the front and rear directions, for example.

Here, each intermediate divided body 32A has a rectangular guard plate 33, a stopper 34 welded to the lower end of the guard plate 33, and an inverted U-shaped welded to the stopper 34 and the guard plate 33. A bolt insertion hole 35A is formed in the upper surface of the bracket 35, and two screw holes 35B, 35B are screwed in the front and rear surfaces, respectively, spaced apart upward and downward. I have. Each of the intermediate divided bodies 32A sandwiches the spacers 36, 36,... Between the left and right guard plates 33, and fastens the spacers 36 and the respective guard plates 33 with bolts or the like, so as to move in the left and right directions. It is integrated while maintaining a certain interval.

On the other hand, the front end divided body 32B is formed to be longer than the intermediate divided body 32A as a whole, and has a rectangular guard plate 37, a stopper 38 welded to the lower end of the guard plate 37, and the stopper 38. And a guard plate 37 which is welded to the guard plate 37. A plurality of bolt insertion holes 39A are formed in the upper surface of the bracket 39,
On the rear surface, two screw holes 39B, 39B are spaced apart upward and downward.
Is screwed. And the tip divided body 32B is the left,
The spacer 36 is sandwiched by the right guard plate 37, and the spacer 36 and each guard plate 37 are fastened by bolts or the like, so that the spacer 36 and the right guard plate 37 are integrated while maintaining a constant space in the left and right directions.

Each of the intermediate divided bodies 32A is provided with the bolt 20 inserted into the bolt insertion hole 35A of the bracket 35 with the bearing 11A of each lower roller 11 sandwiched in the front and rear directions.
Is attached to the attachment flange 6B of the side frame 6. In addition, the tip divided body 32B is formed by an intermediate divided body 32A.
With the bearing 11A of the lower roller 11 sandwiched between the bolt 2 and the bolt 2 inserted into the bolt insertion hole 39A of the bracket 39.
0 attaches to the mounting flange 6B of the side frame 6.

Further, the protective cover 27 sandwiches one front surface and the other rear surface of the bracket 35 of the adjacent intermediate divided body 32A with each mounting surface portion 27A, and forms each through hole 27C.
The bolt 28 inserted into the screw hole 35 of the bracket 35
By being screwed to B, it is attached to each intermediate divided body 32A. Similarly, the protective cover 27 is attached between the bracket 39 of the tip divided body 32B and the bracket 35 of the intermediate divided body 32A.

By attaching the protective cover 27 between the track guard divisions 32 in this manner, each lower roller 1 accommodated between the track guard divisions 32 is provided.
One bearing 11A is configured to be covered by a closed surface 27B of the protective cover 27.

In this embodiment, the protective cover 27 is attached between the track guard divisions 32, and the bearing 11A accommodated between the track guard divisions 32 is covered. The first point is that the rock or the like can be reliably prevented from colliding with the bearing 11A at the time of running or excavation work of the railroad vehicle, and the earth and sand caught in the crawler belt 9 can enter the bearing 11A at the time of running. There is no particular difference from the embodiment of FIG.

However, in this embodiment, the side frame 6
Each of the track guard divided bodies 32 detachably attached to the mounting flange 6B, and each of the track guard divided bodies 32
By configuring the track guard 31 with the protective cover 27 attached therebetween, for example, it is possible to improve workability when replacing each lower roller 11 or the bearing 11A and the like. Lower roller 11
The replacement work such as will be described with reference to FIGS.

First, the lower traveling body 1 is jacked up by using the working device 3 in a state where the crawler belt tension adjusting device (not shown) is loosened and the idler wheel 8 is moved to the drive wheel 7 side, thereby crawling the crawler belt 9. (See FIG. 7).

As a result, as shown in FIG. 8, the crawler belt 9 is separated downward from the lower roller 11, and the track link 9A of the crawler belt 9 and the track guard split body 32 (intermediate split body 32A).
A gap is formed with the stopper 34 of FIG.

In this state, by loosening the bolts 12 fastening the bearing 11A to the mounting flange 6B of the side frame 6, the damaged lower roller 11 is attached to the mounting flange 6B.
After removing downward from B, track link 9 of track 9
It can be pulled out from the gap between A and the stopper 34 of the track guard split body 32 to the outside.

Then, the lower roller 11 to be replaced is inserted into the gap between the track link 9A of the crawler belt 9 and the stopper 34 of the track guard split body 32, and is attached to the lower surface of the mounting flange 6B of the side frame 6 using the bolt 12. This completes the replacement operation of the lower roller 11 or the bearing 11A.

As described above, according to the present embodiment, each track guard divided body 32 divided in the front and rear directions of the side frame 6 is disposed between the bearings 11A of the lower rollers 11. The lower roller 11 or the bearing 11A can be attached to and detached from the side frame 6 without removing each track guard divided body 32, thereby significantly improving the workability when replacing the lower roller 11 or the bearing 11A. it can.

In each of the above embodiments, a hydraulic excavator has been described as an example of a tracked vehicle. However, the present invention is not limited to this. For example, another tracked vehicle such as a hydraulic crane or a bulldozer may be used. It can be widely applied to undercarriage.

[0059]

As described in detail above, according to the first aspect of the present invention, the notch portion is provided extending in the front and rear directions of the side frame and accommodating the bearing portion of each lower roller. Since the track guard is composed of the track guard main body and the protective cover detachably provided at the position of each notch of the track guard main body, the bearing of the lower roller accommodated in the notch of the track guard main body. Is covered by the protective cover, it is possible to reliably prevent the rocks and the like from colliding with the bearing portion during traveling or excavation work to damage the bearing portion and to prevent earth and sand from entering the bearing portion.

Thus, each lower roller can be smoothly rotated at all times, and the running stability of the tracked vehicle can be guaranteed for a long period of time. Moreover, by installing a protective cover between the notches in the track guard body,
The rigidity of the entire track guard can be improved.

According to the second aspect of the present invention, the track guard is divided into a plurality of parts in the front and rear directions of the side frame, and is provided between the bearings of the lower rollers. Since the track guard is constituted by the protective cover attached between the bodies, the bearing portion of the lower roller located between the track guard divided bodies can be covered by the protective cover. Thus, it is possible to prevent rocks and the like from colliding with the bearing portion during traveling and excavation work, and prevent earth and sand from entering the bearing portion.

Further, since the track guard is composed of a plurality of track guard divisions, each lower roller or its bearing can be detached from between the track guard divisions. Accordingly, it is not necessary to remove the track guard from the side frame when replacing each damaged lower roller or its bearing portion, and the workability at the time of replacement can be greatly improved. Moreover, by integrally connecting the track guard divisions in the front and rear directions via the protective cover, the rigidity of the entire track guard can be improved.

[Brief description of the drawings]

FIG. 1 is an enlarged side view showing a track guard according to a first embodiment attached to a side frame.

FIG. 2 is an exploded perspective view showing a part of the track guard in FIG.

FIG. 3 is a cross-sectional view as seen from the direction of arrows III-III in FIG.

FIG. 4 is an enlarged side view showing a state where the track guard according to the second embodiment is attached to a side frame.

FIG. 5 is an exploded perspective view showing a part of the track guard in FIG.

FIG. 6 is a cross-sectional view as seen from the direction of arrows VI-VI in FIG. 4;

FIG. 7 is an external view showing a lower traveling body of a hydraulic shovel according to a second embodiment in a jack-up state.

FIG. 8 is a cross-sectional view of the same position as in FIG. 6, showing a state where the crawler belt is loosened by jack-up.

FIG. 9 is a side view showing a conventional hydraulic excavator.

FIG. 10 is an enlarged side view showing a state where a track guard according to the related art is attached to a side frame.

11 is a cross-sectional view as viewed from the direction indicated by arrows XI-XI in FIG.

FIG. 12 is an exploded perspective view showing a part of the track guard in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower traveling body 4 Track frame 6 Side frame 7 Drive wheel 8 Idler wheel 9 Crawler belt 11 Lower roller 11A Bearing (bearing part) 21, 31 Track guard 22 Track guard main body 23A Notch 27 Protective cover 32 Track guard split body 32A Intermediate Split body 32B Tip split body

Claims (2)

[Claims] A track frame having driving wheels and idle wheels at both front and rear ends of left and right side frames; a crawler belt wound between the driving wheels and idle wheels of the track frame; In order to guide the crawler belt between the drive wheel and the idler wheel, a plurality of lower rollers provided on the lower surface side of each side frame, and the crawler belt is displaced leftward and rightward with respect to each lower roller. In order to prevent the lower roller from running, a lower part of a tracked vehicle comprising a track guard detachably attached to the lower surface side of each of the side frames so as to sandwich each of the lower rollers from the left and right directions, The track guard extends in the front and rear directions of the side frame, and covers the track guard body in which a notch portion for accommodating the bearing of each of the lower rollers is formed, and covers the bearing of each of the lower rollers. Because the tiger Undercarriage of crawler type vehicle, characterized by being configured and a protective cover detachably provided to the position of each notch of Kugado body. 2. A track frame having drive wheels and idle wheels at both front and rear ends of left and right side frames, a crawler belt wound between the drive wheels and idle wheels of the track frame, In order to guide the crawler belt between the drive wheel and the idler wheel, a plurality of lower rollers provided on the lower surface side of each side frame, and the crawler belt is displaced leftward and rightward with respect to each lower roller. A lower part of a tracked vehicle comprising a track guard detachably attached to a lower surface of each side frame so as to sandwich the lower rollers from left and right directions. The guard is divided into a plurality of parts in front and rear directions of the side frame, and a plurality of divided track guards disposed between the bearings of the lower rollers, and the respective guards for covering the bearings of the lower rollers. Track guard split Undercarriage of crawler type vehicle, characterized in that consisted detachably and a protective cover which is provided between.