JP2000255463A - Crawler belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To limit the sticking of mud or the like to a track shoe during traveling on a muddy place or the like. SOLUTION: By providing left and right track links 9 and 9, and a mud sticking preventing member 15 in a space surrounded by bushes 12 and 12 provided in the front and rear end sides of each track link 9 in one side face 14A of a track shoe 14, the volume of this space is reduced by an amount equal to the volume of the mud sticking preventing member 15. Thus, when a hydraulic shovel travels on a muddy place or the like, the amount of mud sticking in the space is reduced, the amount of mud deposited after falling on the upper surface or the like of a side frame during the round movement of a crawler belt is reduced compared with that in a conventional technology.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler track used for a tracked vehicle such as a hydraulic shovel and a hydraulic crane.

[0002]

2. Description of the Related Art In general, a tracked vehicle such as a hydraulic shovel has a track frame provided with side frames on both left and right sides of a center frame, and a drive frame provided on one side in front and rear of the side frames. A wheel, an idler wheel provided on the other side in the front and rear directions of the side frame, and a crawler belt wound between the drive wheel and the idler wheel. The crawler belt is guided on the upper side of the side frame. An upper roller is provided for the operation.

[0003] Here, the crawler track of this kind of the prior art is:
An outer link portion is formed on one side in the front-rear direction, and an inner link portion is formed on the other side in the front-rear direction. The left and right track links are connected endlessly to each other and provided between the inner link portions of the track links. And a connecting pin provided in the bush and inserted into the bush, both ends in the left and right directions connected to the outer link portion, and a flat plate-like body, one side of which is fixed to the track link and the other side of which is fixed to the track link. And a shoe serving as a ground contact surface with respect to the ground.

[0004] The driving wheels are rotated by a traveling motor or the like, and the track link orbits between the idler wheels and the driving wheels, whereby the hydraulic excavator travels.

[0005]

In the above-described crawler belt according to the prior art, a space surrounded by left and right track links and front and rear bushes is formed on one side surface of the shoe. When traveling on muddy land, mud and the like tend to adhere to the above-mentioned space, and a part of the mud and the like adhering to this space is disengaged by the drive link (sprocket) when the track link meshes with the drive wheel (sprocket). Although removed by the teeth, most mud remains.

[0006] The mud remaining in the above-mentioned space is
When the crawler belt orbits, it falls and accumulates on the upper surface of the side frame and the like, and the muddy hinders the smooth rotation of the upper roller, thereby causing a problem that the traveling performance of the hydraulic shovel is reduced.

For this reason, the mud accumulated between the side frame and the crawler belt needs to be removed using, for example, washing water, a scoop, or the like. In particular, when the mud accumulated in a cold region or the like becomes frozen soil. However, there is a problem that such a removal operation becomes extremely difficult, and a great deal of time and labor is spent.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a crawler belt capable of suppressing the amount of mud or the like adhering to a shoe when traveling on muddy ground or the like. The purpose is.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has an outer link portion formed on one side in the front-rear direction and an inner link portion formed on the other side in the front-rear direction. Left and right track links to be connected, a bush provided between inner link portions of the track links, and a connection inserted and provided in the bush, and both left and right ends connected to an outer link portion. The present invention is applied to a crawler belt including a pin and a shoe which is formed as a flat plate and has one side surface fixed to a track link and the other side surface serving as a ground contact surface with respect to the ground.

The first aspect of the present invention is characterized in that one side surface of the shoe has mud adhesion preventing protrusions at positions surrounded by left and right track links and front and rear bushes. That is, a member is provided.

With this configuration, the volume of the space surrounded by the left and right track links and the front and rear bushes on one side surface of the shoe is reduced by the provision of the mud adhesion preventing member. Therefore, the amount of mud adhering to the space can be reduced.

A second aspect of the present invention is that the mud adhesion preventing member is formed in a triangular mountain shape having a ridge portion protruding from one side surface of the shoe and extending leftward and rightward.

According to a third aspect of the present invention, the mud adhesion preventing member has a structure in which a gap is formed between the tooth portion and the convex outer peripheral surface in a state where the bush is engaged with the tooth portion of the drive wheel. .

With this configuration, it is possible to prevent the mud adhesion preventing member from being inadvertently bitten by the drive wheel, and to ensure a state in which the bush and the drive wheel are properly meshed.

According to a fourth aspect of the present invention, the mud adhesion preventing member is formed of an elastic material. With this configuration, in a state where the bush is meshed with the tooth portion of the drive wheel,
For example, even if a rock or the like is sandwiched between the tooth portion of the drive wheel and the mud adhesion preventing member, it is possible to prevent the bush from separating from the driving wheel due to the elastic deformation of the mud adhesion preventing member.

According to a fifth aspect of the present invention, a water-repellent film is formed on the surface of the mud adhesion preventing member. With this configuration, the water contained in the mud is repelled by the water-repellent coating, so that the mud or the like can be prevented from adhering to the mud adhesion preventing member itself.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a crawler according to the present invention will be described below in detail with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a track frame which constitutes a traveling body such as a hydraulic shovel. The track frame 1 is provided on a center frame 2 and on both left and right sides of the center frame 2, and extends right and left extending in the front-rear direction. The side frame 3 (only one is shown) is roughly configured.

Reference numeral 4 denotes a driving wheel (sprocket) provided on one side of the side frame 3 in the front-rear direction.
Is driven to rotate by a traveling motor (not shown), and causes the crawler belt 8 to be described later to orbit. Reference numeral 5 denotes an idler wheel (idler) rotatably provided on the other side in the front-rear direction of the side frame 3, and a crawler belt 8 is wound between the idler wheel 5 and the drive wheel 4.

Reference numerals 6 and 6 denote two upper rollers rotatably provided on the upper surface side of the side frame 3.
While supporting the crawler belt 8 from below, the crawler belt 8 is
To prevent contact. Reference numerals 7, 7,... Denote a plurality of lower rollers rotatably provided on the lower surface side of the side frame 3. Each lower roller 7 supports the side frame 3 on the crawler belt 8 together with the driving wheel 4 and the idler wheel 5. It is.

Reference numeral 8 denotes a crawler belt wound between the driving wheel 4 and the idler wheel 5. As shown in FIGS. 2 to 4, the crawler belt 8 includes a track link 9, a bush 12, and a connecting pin 13 which will be described later. , Shoes 14 and the like. The crawler belt 8 is configured such that the bush 12 located at the connecting portion of each track link 9 meshes with the tooth portion 4A of the drive wheel 4, and the drive wheel 4 is driven to rotate in this state, so that the drive wheel 4 and the idler wheel are rotated. 5 is performed.

Reference numerals 9 and 9 denote left and right track links, which are disposed in the left and right directions and are connected endlessly to each other. Each track link 9 extends in the front and rear direction. here,
As shown in FIG. 3, an outer link portion 10 is formed at one end of the track link 9 in the front-rear direction.
0 has a pin insertion hole 10A through which the connection pin 13 is inserted. An inner link portion 11 is formed at the other end in the front-rear direction of the track link 9, and a bush insertion hole 11A into which the bush 12 is inserted is formed in the inner link portion 11.

Reference numeral 12 denotes a cylindrical bush provided between the inner link portions 11 of the track links 9 and having a connecting pin 13 inserted into the inner peripheral side thereof. The track link 9 is press-fitted into a bush insertion hole 11A provided in the inner link portion 11 of the track link 9.

Reference numeral 13 denotes a connecting pin which connects adjacent track links 9 so as to be rotatable with each other.
Numeral 3 is inserted into the inner peripheral side of the bush 12 with a small gap.
Are press-fitted into the pin insertion holes 10A provided in the outer link portion 10 of FIG.

Reference numeral 14 denotes a shoe fixed to the left and right track links 9, 9, and the shoe 14 is formed as a flat plate. The shoe 14 has one side surface 14A fixed to each track link 9 using a bolt (not shown) or the like, so that the left and right track links 9 are integrally connected. On the other hand, three claw portions 14C, 14C,.

Reference numeral 15 denotes a convex-shaped mud adhesion preventing member fixedly provided on one side surface 14A of the shoe 14. As shown in FIGS. 5 and 6, the mud adhesion preventing member 15 is made of an elastic material such as rubber. A mounting seat portion 15A fixed to one side surface 14A of the shoe 14 by a material, and a semicircular ridge portion 1 protruding upward from the mounting seat portion 15A and extending leftward and rightward.
5B.

The mud adhesion preventing member 15 is formed by fixing the mounting seat portion 15A to one side surface 14A of the shoe 14 by, for example, bonding, baking, or the like, so that the left and right track links 9, 9 are connected to each other. The track link 9 is disposed in a space S surrounded by front and rear bushes 12 provided on the front end side and the rear end side of the track link 9. in this case,
As shown in FIG. 7, the outer peripheral surface 15 </ b> C of the mud adhesion preventing member 15 is located between the tooth 4 </ b> A of the drive wheel 4 in a state where the bush 12 of each track link 9 meshes with the tooth 4 </ b> A of the drive wheel 4. To form an appropriate gap.

Thus, by providing the mud adhesion preventing member 15 in the space S formed on one side surface 14A of the shoe 14, the amount of mud and the like adhering to the space S is reduced by the volume of the mud adhesion preventing member 15. It has a configuration that can be reduced by the amount.

Reference numeral 16 denotes a water-repellent coating formed on the surface of the mud adhesion preventing member 15. The coating 16 is formed of a fluorine-based resin such as ethylene tetrafluoride resin (PTFE), or a water-repellent silicon-based resin. It is formed by applying a material to the surface of the mud adhesion preventing member 15. The coating 16 repels water contained in mud and the like,
This is to prevent mud from adhering to the mud adhesion preventing member 15 itself.

The crawler belt 8 according to the present embodiment has the above-described configuration, and its basic operation is not particularly different from that of the prior art.

However, in the present embodiment, the left and right track links 9, 9 and the bush 12 provided before and after each track link 9 on one side surface 14 A of each shoe 14 constituting the crawler belt 8. , 12 surrounded by a space S
Is reduced in advance by the volume of the mud adhesion preventing member 15 provided in the space S.

Therefore, when the excavator travels on muddy ground or the like, the amount of mud adhering to the space S can be reduced, and the upper surface of the side frame 3 or the like when the crawler belt 8 circulates. The amount of mud falling and accumulating on the ground can be greatly reduced as compared with the prior art.

Accordingly, it is possible to simplify a cleaning operation for removing mud and the like accumulated between the crawler belt 8 and the side frame 3 and the like, and furthermore, the mud accumulated on the upper surface side of the side frame 3 allows the upper roller 6 to smoothly move. The rotation of the hydraulic shovel can be prevented from being hindered, and the hydraulic shovel can be stably driven for a long period of time.

The mud adhesion preventing member 15 forms a gap between each track link 9 and each tooth 4A of the driving wheel 4 in a state where each track link 9 is meshed with the driving wheel 4, so that the mud adhesion preventing member 15 is formed. 15 can be prevented from being inadvertently caught by the drive wheel 4, and a state where each track link 9 and the drive wheel 4 are properly meshed can be ensured.

Further, since the mud adhesion preventing member 15 is formed of an elastic material such as rubber, the bush 12 of the crawler belt 8 is engaged with the tooth portion 4A of the drive wheel 4 while the bush 12 of the crawler belt 8 meshes with the tooth portion 4A of the drive wheel 4, for example. Even if rock or the like is caught between the anti-adhesion member 15 and the mud adhesion prevention member 15, the bush 12 can be prevented from detaching from the driving wheel 4 because the mud adhesion prevention member 15 can be elastically deformed.

Further, since the coating 16 having water repellency is provided on the surface of the mud adhesion preventing member 15, the water contained in the mud and the like is repelled by the coating 16 to adhere to the mud adhesion preventing member 15 itself. The amount of mud generated can be reduced, and the amount of mud deposited between the crawler belt 8 and the side frame 3 can be further reduced.

In the above-described embodiment, the mud adhesion preventing member 15 has been described as being formed of an elastic material such as rubber. However, the present invention is not limited to this. May be formed.

Further, in the above-described embodiment, the mud adhesion preventing member 15 is attached to the shoe 14 by bonding, baking or the like.
However, the present invention is not limited to this. For example, a stud bolt is embedded in the mud adhesion preventing member 15, and the mud adhesion preventing member 15 is fixed to the shoe 14 using the stud bolt. It may be.

Furthermore, in the above-described embodiment, a description has been given by taking a hydraulic excavator as an example of a tracked vehicle. However, the present invention is not limited to this, and may be applied to other tracked vehicles such as a hydraulic crane and a bulldozer. May be applied.

[0040]

As described in detail above, according to the first aspect of the present invention, one of the shoes constituting the crawler belt, which is fixed to the track link, has left and right track links and front and rear bushes. Is provided with a mud adhesion preventing member having a convex shape at a position surrounded by the above, so that the volume of the space surrounded by the left and right track links and the front and rear bushes on one side of the shoe can be reduced. The size can be reduced by the provision of the member, and the amount of mud adhering to this space can be reduced. For this reason, it is possible to suppress a large amount of mud and the like adhering to the shoe from being deposited on the track frame and the like, and it is possible to simplify the operation of removing the deposited mud and to stabilize the tracked vehicle for a long period of time. You can run.

According to the second aspect of the present invention, since the mud adhesion preventing member is formed in a triangular mountain shape having a ridge portion protruding from one side surface of the shoe and extending leftward and rightward, the mud adhesion preventing member is formed. Can be stably arranged on one side of the shoe.

According to the third aspect of the invention, the mud adhesion preventing member has a structure in which a gap is formed between the tooth portion and the convex outer peripheral surface in a state where the bush is meshed with the tooth portion of the drive wheel. As a result, it is possible to prevent the mud adhesion preventing member from being inadvertently bitten by the drive wheels during traveling of the tracked vehicle, and to ensure a state in which the bush and the drive wheels properly mesh with each other. The rail-type vehicle can run stably.

According to the fourth aspect of the present invention, since the mud adhesion preventing member is made of an elastic material, for example, the crawler belt bush is meshed with the driving wheel tooth portion, for example, the driving wheel tooth portion and the mud adhering member are engaged. Even when rocks or the like are caught between the prevention member and the mud adhesion prevention member, the bush can be prevented from being detached from the drive wheels due to the elastic deformation of the mud adhesion prevention member.

Further, according to the fifth aspect of the present invention, since the water-repellent coating is formed on the surface of the mud adhesion preventing member, the water contained in the mud is repelled by the coating, whereby the mud adhesion preventing member itself is formed. Can be prevented from adhering to the shoe, and the amount of mud adhering to the shoe can be further reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing a traveling body of a hydraulic shovel to which a crawler belt according to an embodiment of the present invention is applied.

FIG. 2 is an enlarged view of a main part showing a crawler belt, a drive wheel, and the like in FIG. 1 in an enlarged manner.

FIG. 3 is a sectional view showing a track link, a bush, a connecting pin, a shoe, a mud adhesion preventing member, and the like, as viewed from the direction of arrows III-III in FIG.

FIG. 4 is a cross-sectional view showing a track link, a bush, a connecting pin, a shoe, a mud adhesion preventing member, and the like, as viewed from a direction indicated by an arrow IV-IV in FIG.

FIG. 5 is a perspective view showing a shoe and a mud adhesion preventing member.

6 is a cross-sectional view showing a shoe, a mud adhesion preventing member, a coating film provided on the mud adhesion preventing member, and the like, as viewed from the direction indicated by arrows VI-VI in FIG.

FIG. 7 is an enlarged view of a main part showing a gap formed between a tooth portion of the drive wheel and a mud adhesion preventing member when the bush is meshed with the drive wheel.

[Explanation of symbols]

 Reference Signs List 4 drive wheel 4A tooth portion 8 crawler belt 9 track link 10 outer link portion 10A pin insertion hole 11 inner link portion 11A bush insertion hole 12 bush 13 connecting pin 14 shoe 14A one side surface 14B other side surface 15 mud adhesion preventing member 15B ridge line portion 16 Coating

Claims (5)

[Claims] 1. An outer link portion is formed on one side in the front-rear direction and an inner link portion is formed on the other side in the front-rear direction, and left and right track links connected endlessly to each other; A bush provided between the inner link portions, a connecting pin inserted into the bush, and both left and right ends connected to the outer link portion;
In a crawler belt formed as a flat plate body, one side surface is fixed to the track link and the other side surface is a ground contact surface with respect to the ground, and one side surface of the shoe includes left and right track links. A crawler crawler characterized in that a protrusion-shaped mud adhesion preventing member is provided at a position surrounded by the front and rear bushes. 2. The crawler belt according to claim 1, wherein the mud adhesion preventing member is formed in a triangular mountain shape having a ridge portion protruding from one side surface of the shoe and extending leftward and rightward. 3. The mud adhesion preventing member has a configuration in which a gap is formed between the tooth portion and a convex outer peripheral surface in a state where the bush is meshed with a tooth portion of a driving wheel. Tracks described in. 4. The crawler belt according to claim 1, wherein the mud adhesion preventing member is formed of an elastic material. 5. The crawler belt according to claim 1, wherein a water-repellent coating is formed on the surface of the mud adhesion preventing member.