KR100754313B1 - Multitude link seal for a caterpillar track - Google Patents

Abstract

A multi-link seal for a caterpillar track is provided to maximize the wear-resisting property and the cushion function by forming a main body of urethane and forming a sub-body engaged with the main body of a rubber. A multi-link seal for a caterpillar track includes a main body(100) and a sub-body(200). The area of the upper surface of the sub-body is wider than that of the bottom surface thereof. A first stepped portion is formed at the upper end of the inner peripheral surface of the sub-body. A curved first inclined surface connected to the bottom surface of the sub-body is formed. The bottom surface of the sub-body is attached to a second surface in a substantially same area. The inner peripheral surface of the sub-body is an O-ring.

Description

MULTITUDE LINK SEAL FOR A CATERPILLAR TRACK}

1 is a cross-sectional view showing that a conventional link seal is mounted on a track of a track vehicle.

Figure 2 is a perspective view showing a first example of a multi-link seal for track tracks according to an embodiment of the present invention.

3 is a cross-sectional view taken along line II ′ shown in FIG. 2.

4 is a cross-sectional view showing that the link seal shown in FIG. 2 is mounted on a track.

Figure 5 is a perspective view showing a second example of a multi-link seal for track tracks according to an embodiment of the present invention.

FIG. 6 is a cross-sectional view taken along the line II-II ′ shown in FIG. 5.

7 is a cross-sectional view showing that the link seal shown in FIG. 5 is mounted on a track.

8 is a perspective view showing a first example of a multi-link seal for a track vehicle track according to another embodiment of the present invention.

FIG. 9 is a cross-sectional view taken along the line III-III ′ shown in FIG. 8.

10 is a cross-sectional view showing that the link seal shown in FIG. 8 is mounted on a track.

11 is a perspective view showing a second example of the multi-link seal for track tracks according to another embodiment of the present invention.

12 is a cross-sectional view taken along the line IV-IV ′ shown in FIG. 11.

FIG. 13 is a cross-sectional view showing that the link seal shown in FIG. 11 is mounted on a track.

14 is a perspective view showing a third example of a multi-link seal for a track vehicle track according to another embodiment of the present invention.

FIG. 15 is a cross-sectional view along the line VV ′ shown in FIG. 14.

16 is a cross-sectional view showing that the link seal shown in FIG. 14 is mounted on a track.

** Description of symbols for the main parts of the drawing **

100: main body 110: step portion

111: first page 112: second page

150: grooves 160: protrusions

200. 200 ': sub body 210: first stepped portion

220: first inclined plane 220 ': first inclined plane

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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track seal for a track vehicle track, and more particularly, to prevent the inflow of impurities or foreign substances such as soil and water from the outside to the track of the track, and to prevent grease injected between the bushing and the pin of the link. The present invention relates to a link seal for track tracks that can prevent deformation and extend the overall noise reduction and life of the equipment.

In general, heavy equipment such as dozers, cranes and excavators, and tracked vehicles such as tanks (aka tanks), self-propelled artillery and armored vehicles are driven using a traveling device having a caterpillar.

In the track vehicle, an upper track for preventing sagging of the track is installed on the upper side frame, and a lower track for distributing the weight of the equipment evenly on the ground through the track and smoothing the rotation is installed.

1 is a cross-sectional view showing that a conventional link seal is mounted on a track of a track vehicle.

As shown in Figure 1, the track is provided with a link seal 30 having a ring shape in the axial direction. The link seal 30 enables the rotation and at the same time prevents the injected grease from leaking, and blocks the impurities or foreign substances such as water and earth and sand introduced from the outside.

This link seal 30 is mounted as follows.

Insert the link seal 30 in the free state into the group 25. Next, a certain force is applied from the outer side of the group 25 to be crimped at the same time. At this time, the bushing 20 is disposed inside the link seal 30, and the link seal 30 is tightly sealed to the outer surface of the bushing 20 by being compressed.

Then, grease is injected into the space between the bushing 20 and the fin 10. And assembling is completed by forcing by constant torque.

The link seal 30 mounted as described above is fitted into the pin 10 by the length of the bushing 20 by inserting it in both of the groups 25 of the link and compressed by forcing hydraulically from both outer sides of the group 25. Is mounted.

At this time, the link seal 30 is compressed from both sides as described above, the body of the open side of the link seal of the 'M' or 'W' shape occurs in contact with each other and pressed.

Therefore, the bodies of the open side of the link seal 30 are retracted from each other to generate a minute gap with the outer surface of the bushing 20.

In addition, the link seal 30 of the 'M' or 'W' shape as described above, when the 'M' or 'W' shaped portion to act as a spring or excessive tightening phenomenon, the link seal 30 The cushion function cannot be performed normally because the buffer space inside the) is not formed.

In addition, since the link seal 30 as described above does not normally perform the role of a spring due to excessive seizure, the link seal 30 and the bushing 20 and Friction heat is generated.

Furthermore, there is a problem in that the link seal 30 is worn out prematurely due to the frictional heat generation, and the seal shape is easily deformed due to the characteristics of the link seal 30 made of a urethane material, thereby intrinsic function of the link seal 30. There is a problem of deterioration.

In particular, during operation of the tracked vehicle, impurities or foreign substances, such as water and earth or sand, flow into the gaps generated at the inner surface of the link seal 30 and the outer surface of the bushing 20 as described above, and remain in the gaps. Impurities or foreign matter remaining in the gap at the time of interruption flow into the space between the fin 10 and the bushing 20 to corrode the surface of the fin 10 and the bushing 20 or to deform the injected grease. There is this.

Therefore, the link seal 30, which is conventionally performed, is easily formed in the upper side of the portion to which the load is applied, and impurities or foreign substances such as water and earth and sand are contained in the gaps between the pin 10 and the bushing 20. And dilutes the grease injected between the fin 10 and the bushing 20 to deform and deforms the grease, thereby degrading the grease, thereby corroding the surface of the fin and the bushing. Due to the swelling of rust, there is always a problem that the track vehicle becomes impossible to operate.

On the other hand, the link seal 30 of the 'M' or 'W' shape shown in Figure 1 consists of a sealing portion in contact with the outer peripheral surface of the bushing, and an elastic portion connected to the sealing portion and in contact with the inner surface of the group 25 .

However, since the conventional link seal 30 is made of urethane resin, both the sealing portion and the elastic portion are made of urethane resin.

Therefore, the conventional link seal 30 is installed in the equipment in a crimped state interposed between the bushing 20 and the elbow 25 as shown in FIG. 1, and exposed to heat at a constant temperature as the equipment is operated. do.

At this time, the conventional link seal made only of the urethane resin is in a fixed state when subjected to heat, and in addition to this, there is a problem in that the sealing effect is lowered because the restoring force is insufficient.

The present invention was created to solve the above problems, the first object of the present invention is the protrusion formed on the inner peripheral surface of the main body is in close contact with the outer surface of the bushing, the space between the bushing and the bushing and the pin that is in close contact with the link seal It is to provide a multi-link seal for track tracks that can block the inflow of impurities or foreign matter such as water and soil from the outside in the inter-space.

The second object of the present invention is a track vehicle track that can reduce the phenomenon that the link seal is worn early by maximizing the cooling effect of the link seal by forming the groove portion and the shape of the protrusion and injecting grease therein. To provide a multi-link seal for.

A third object of the present invention is to provide a multi-link seal for an overall track vehicle track by preventing deformation of grease injected between the bushing and the pin of the link.

The fourth object of the present invention is to manufacture the main body by urethane, and by manufacturing the server body coupled to the rubber by the rubber, to maximize the wear resistance due to the urethane and cushioning function due to the rubber, the excessive role of the spring function normally It is possible to minimize frictional heat between the link seal and the bushing during operation due to excessive crimping during the operation of the tracked vehicle, and inflow of impurities or foreign substances when the vehicle is stopped after the tracked vehicle is operated for a long time. The present invention provides a multi-link seal for track tracks that prevents the surface of pins and bushings from being corroded and prevents swelling due to rust expansion. .

In order to achieve the above object, the present invention provides an embodiment of a multi-link seal for track vehicle tracks.

In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted, and the following terms will consider functions in the present invention. The terminology set forth herein may vary depending on the intention or custom of users, manufacturers, and producers, and the definition should be made based on the contents throughout the specification.

Thus, the multi-link seal is disposed on the outer periphery of the main body of the O-ring shape, the stepped portion having a stepped portion having a second surface parallel to the first surface perpendicular to the bottom surface on the outer periphery, the inner peripheral surface, And a sub body fitted into the stepped portion such that the bottom surface is in close contact with the first surface and the bottom surface is in close contact with the second surface, wherein the sub body has an area of an upper surface thereof wider than an area of the bottom surface thereof, and an inner peripheral surface thereof. A first stepped portion is formed at an upper end, and a curved first inclined surface connected to the bottom of the sub body is formed from the side of the outer circumference thereof, and the bottom of the sub body is in close contact with substantially the same area as the second surface. Preferably, the inner peripheral surface is an O-ring in close contact with a part of the first surface.

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The inner circumferential surface of the main body preferably has a plurality of protrusions formed along the inner circumferential direction thereof.

In addition, the protrusions are preferably grooves that are dug at a predetermined depth from the inner circumferential surface of the main body to the outer circumferential side thereof.

In addition, the protrusions are protrusions protruding from the inner circumferential surface of the main body, the protrusions are preferably gradually reduced in thickness toward the inside relative to the inner circumferential surface of the main body.

In order to achieve the above object, the present invention provides another embodiment of a multi-link seal for track vehicle tracks.

The multi-link seal is disposed on the outer circumference of the main body of the O-ring shape and the stepped portion having a stepped portion having a second surface parallel to the first surface perpendicular to the bottom surface on the outer circumference, the inner peripheral surface of the And a sub-body fitted to the stepped portion to be in close contact with the first surface and to be in close contact with the second surface.

Here, the sub body has an area of the upper surface smaller than that of the bottom surface, and a curved first 'inclined surface connected to the top surface is formed from an outer end of the bottom surface, and the bottom of the sub body is formed of the first surface. The O-ring is in close contact with a wider area than two surfaces, and the inner circumferential surface is in close contact with substantially the same area as the first surface.

The inner circumferential surface of the main body preferably has a plurality of protrusions formed along the inner circumferential direction thereof.

In addition, the protrusions are preferably grooves that are dug at a predetermined depth from the inner circumferential surface of the main body to the outer circumferential side thereof.

In addition, the protrusions are protrusions protruding from the inner circumferential surface of the main body, the protrusions are preferably gradually reduced in thickness toward the inside relative to the inner circumferential surface of the main body.

In order to achieve the above object, the present invention provides another embodiment of a multi-link seal for track vehicle tracks.

The multi-link seal is formed on the outer periphery with a stepped step of having a second 'parallel parallel to the first' plane perpendicular to the bottom surface, the outer ring of the O-ring-shaped inner body made of urethane resin, and the inner body It is disposed in, the inner circumferential surface is in close contact with the first 'surface and its bottom surface is fitted to the step so that the close contact with the second' surface, and comprises an outer body made of an elastic material.

Here, the projection is preferably formed along the upper end of the inner circumferential surface of the inner body to be located at the upper end of the first 'surface.

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Hereinafter, with reference to the accompanying drawings, it will be described a multi-link seal for track vehicle tracks according to an embodiment of the present invention.

Figure 2 is a perspective view showing a first example of a multi-link seal for track tracks according to an embodiment of the present invention. 3 is a cross-sectional view taken along line II ′ shown in FIG. 2. 4 is a cross-sectional view showing that the link seal shown in FIG. 2 is mounted on a track.

2 and 3, the multi-link seal of the present invention has a main body 100 of the O-ring shape. The main body 100 has a stepped portion 110 having a second surface 112 parallel to the first surface 111 that is perpendicular to the bottom surface of the main body 100. The main body 100 is made of an elastic body such as rubber.

O-ring-shaped sub-body 200 is disposed on the outer circumference of the main body 100. The sub body 200 may be fitted to the step part 110 such that an inner circumferential surface thereof is in close contact with the first surface 111, and a bottom surface thereof is in close contact with the second surface 112. The sub body 200 is made of urethane.

Referring to FIG. 3, the sub body 200 has an area of an upper surface thereof wider than an area of its bottom surface. The first stepped portion 210 is formed at an upper end of the inner circumferential surface thereof. Then, the first inclined surface 220 of the curved shape is connected to the bottom surface from the side of the outer periphery.

In addition, the bottom surface of the sub body 200 is in close contact with the second surface 112 of the step portion 110 substantially the same area, and the inner circumferential surface of the sub body 200 is formed of the step portion 110. It comes in close contact with a part of one surface 111. The sub body 200 may be an O-ring.

On the other hand, the inner circumferential surface of the main body 100 has a plurality of protrusions formed along the inner circumferential direction. The protrusion may be grooves 150 that are dug to a predetermined depth from the inner circumferential surface of the main body 100 to the outer circumferential direction thereof.

4 is a cross-sectional view showing that the link seal shown in FIG. 2 is mounted on a track.

Referring to FIG. 4, the link seal of the present invention in the free state shown in FIGS. 2 and 3 is fitted inside the group 25. Then, a predetermined force is applied to the inner side from the outside of the group 25. At this time, the bushing 20 is disposed on the inner side of the link seal. Thus, since the group 25 is compressed, the link seal is mounted to be compressed.

Subsequently, grease is injected into the space between the bushing 20 and the pin 10 and the driving force is fixed by a constant torque to complete the mounting of the link seal of the present invention.

At this time, as shown in Figure 4, the link seal of the present invention can be reduced in thickness by pressing.

Therefore, the grooves 150, which are protrusions formed on the inner circumferential surface of the main body 100, are in close contact with the outer surface of the bushing 20. In addition, the outer portion of the sub-body 200, which is fitted to the stepped portion 110 of the main body 100 may be compressed by the inner surface of the grung 25.

Here, the main body 100 is made of urethane, and the sub body 200 is made of rubber. This is because the urethane seal itself has a limit of elasticity, that is, cushioning force. Therefore, since the mutual disadvantages can be compensated for by using a combination of the wear-resistant urethane and the rubber which is an elastic body, by combining the rubber which is an rubber, the impact from the outside can be easily absorbed, and the rubber and the urethane are used. By doing so, wear resistance can be maintained.

In addition, since the grooves 150, which are protrusions of the main body 100, are formed in an uneven shape, grease is injected into the grooves 150, thereby maximizing a cooling effect of the link seal itself. Accordingly, it is possible to reduce the phenomenon that the link seal is worn out prematurely.

In addition, by being easily in close contact between the inner circumferential surface of the main body 100 and the outer surface of the bushing 20 it is possible to block the entry of foreign matter from the outside. As a result, the life of the tracked vehicle can be extended.

Figure 5 is a perspective view showing a second example of a multi-link seal for track tracks according to an embodiment of the present invention. FIG. 6 is a cross-sectional view taken along the line II-II ′ shown in FIG. 5. 7 is a cross-sectional view showing that the link seal shown in FIG. 5 is mounted on a track.

5 and 6, the multi-link seal of the present invention has a main body 100 of the O-ring shape. The main body 100 has a stepped portion 110 having a second surface 112 parallel to the first surface 111 that is perpendicular to the bottom surface of the main body 100. The main body 100 is made of an elastic body such as rubber.

O-ring-shaped sub-body 200 is disposed on the outer circumference of the main body 100. The sub body 200 may be fitted to the step part 110 such that an inner circumferential surface thereof is in close contact with the first surface 111, and a bottom surface thereof is in close contact with the second surface 112. The sub body 200 is made of urethane.

The sub body 200 has an area of an upper surface thereof wider than an area of its bottom surface. The first stepped portion 210 is formed at an upper end of the inner circumferential surface thereof. Then, the first inclined surface 220 of the curved shape is connected to the bottom surface from the side of the outer periphery.

In addition, the bottom surface of the sub body 200 is in close contact with the second surface 112 of the step portion 110 substantially the same area, and the inner circumferential surface of the sub body 200 is formed of the step portion 110. It comes in close contact with a part of one surface 111. The sub body 200 may be an O-ring.

On the other hand, the inner circumferential surface of the main body 100 has a plurality of protrusions formed along the inner circumferential direction. The protrusions may be protrusions 160 protruding from the inner circumferential surface of the main body 100, and the protrusions 160 may gradually decrease in thickness toward the inside of the main circumferential surface of the main body 100. have. That is, the end portion may be made sharp. The protrusions 160 may be formed side by side two.

Referring to Figure 7, the link seal of the present invention in the free state shown in Figures 5 and 6 is inserted into the inside of the group (25). Then, a predetermined force is applied to the inner side from the outside of the group 25. At this time, the bushing 20 is disposed on the inner side of the link seal. Thus, since the group 25 is compressed, the link seal is mounted to be compressed.

Subsequently, grease is injected into the space between the bushing 20 and the pin 10 and the driving force is fixed by a constant torque to complete the mounting of the link seal of the present invention.

At this time, as shown in Figure 7, the link seal of the present invention can be reduced in thickness by pressing.

Therefore, the grooves 150, which are protrusions formed on the inner circumferential surface of the main body 100, are in close contact with the outer surface of the bushing 20. In addition, the outer portion of the sub-body 200, which is fitted to the stepped portion 110 of the main body 100 may be compressed by the inner surface of the grung 25.

Here, the main body 100 is made of urethane, and the sub body 200 is made of rubber. This is because the urethane seal itself has a limit of elasticity, that is, cushioning force. Therefore, since the mutual disadvantages can be compensated for by using a combination of the wear-resistant urethane and the rubber which is an elastic body, by combining the rubber which is an rubber, the impact from the outside can be easily absorbed, and the rubber and the urethane are used. By doing so, wear resistance can be maintained.

In addition, since the end of the protrusion 160 that is the protrusion of the main body 100 is made sharp, grease may be injected between the protrusions 160. Accordingly, it is possible to maximize the cooling effect of the link seal itself, it is possible to reduce the phenomenon that the link seal wears early.

In addition, the protrusions 160 easily contact the inner circumferential surface of the main body 100 between the outer surfaces of the bushing 20 so that foreign matter flows from the outside into the space between the inner surface of the main body 100 and the bushing. Can be blocked. As a result, the life of the tracked vehicle can be extended.

8 is a perspective view showing a first example of a multi-link seal for a track vehicle track according to another embodiment of the present invention. FIG. 9 is a cross-sectional view taken along the line III-III ′ shown in FIG. 8. 10 is a cross-sectional view showing that the link seal shown in FIG. 8 is mounted on a track.

8 and 9, the multi-link seal of the present invention has a main body 100 of the O-ring shape. The main body 100 has a stepped portion 110 having a second surface 112 parallel to the first surface 111 that is perpendicular to the bottom surface of the main body 100. The main body 100 is made of an elastic body such as rubber.

An outer ring of the main body 100 has an O-ring-shaped sub body 200 '. The sub body 200 ′ has an area of an upper surface smaller than that of a bottom surface thereof. The sub body 200 ′ is formed with a curved first ′ inclined surface 220 ′ connected to the upper surface from an outer end of the bottom surface thereof. The sub body 200 ′ may be an O-ring in which the bottom surface is in close contact with a wider area than the second surface, and the inner circumference is in close contact with the first surface 111.

On the other hand, the inner circumferential surface of the main body 100 has a plurality of protrusions formed along the inner circumferential direction. The protrusion may be grooves 150 that are dug to a predetermined depth from the inner circumferential surface of the main body 100 to the outer circumferential direction thereof.

Referring to FIG. 10, the link seal of the present invention in the free state shown in FIGS. 8 and 9 is inserted into the inside of the group 25. Then, a certain force is applied to the inner side from the outside of the group 25. At this time, the bushing 20 is disposed on the inner side of the link seal. Thus, since the group 25 is compressed, the link seal is mounted to be compressed.

Subsequently, grease is injected into the space between the bushing 20 and the pin 10 and the driving force is fixed by a constant torque to complete the mounting of the link seal of the present invention.

At this time, as shown in Figure 10, the link seal of the present invention can be reduced in thickness by pressing.

Therefore, the grooves 150, which are protrusions formed on the inner circumferential surface of the main body 100, are in close contact with the outer surface of the bushing 20. In addition, the outer portion of the sub-body 200, which is fitted to the stepped portion 110 of the main body 100 may be compressed by the inner surface of the grung 25.

Here, the main body 100 is made of urethane, and the sub body 200 'is made of rubber. This is because the urethane seal itself has a limit of elasticity, that is, cushioning force. Therefore, since the mutual disadvantages can be compensated for by using a combination of the wear-resistant urethane and the rubber which is an elastic body, by combining the rubber which is an rubber, the impact from the outside can be easily absorbed, and the rubber and the urethane are used. By doing so, wear resistance can be maintained.

In addition, since the grooves 150, which are protrusions of the main body 100, are formed in an uneven shape, grease is injected into the grooves 150, thereby maximizing a cooling effect of the link seal itself. Accordingly, it is possible to reduce the phenomenon that the link seal is worn out prematurely.

In addition, the protrusions are easily in contact with each other between the inner circumferential surface of the main body 100 and the outer surface of the bushing 20. Referring to FIG. 4, the main body of the present invention in the free state shown in FIGS. Insert the link seal into the inside of the group (25). Then, a predetermined force is applied to the inner side from the outside of the group 25. At this time, the bushing 20 is disposed on the inner side of the link seal. Thus, since the group 25 is compressed, the link seal is mounted to be compressed.

Subsequently, grease is injected into the space between the bushing 20 and the pin 10 and the driving force is fixed by a constant torque to complete the mounting of the link seal of the present invention.

At this time, as shown in Figure 10, the link seal of the present invention can be reduced in thickness by pressing.

Therefore, the grooves 150, which are protrusions formed on the inner circumferential surface of the main body 100, are in close contact with the outer surface of the bushing 20. In addition, the outer portion of the sub-body 200, which is fitted to the stepped portion 110 of the main body 100 may be compressed by the inner surface of the grung 25.

Here, the main body 100 is made of urethane, and the sub body 200 is made of rubber. This is because the urethane seal itself has a limit of elasticity, that is, cushioning force. Therefore, since the mutual disadvantages can be compensated for by using a combination of the wear-resistant urethane and the rubber which is an elastic body, by combining the rubber which is an rubber, the impact from the outside can be easily absorbed, and the rubber and the urethane are used. By doing so, wear resistance can be maintained.

In addition, since the grooves 150, which are protrusions of the main body 100, are formed in an uneven shape, grease is injected into the grooves 150, thereby maximizing a cooling effect of the link seal itself. Accordingly, it is possible to reduce the phenomenon that the link seal is worn out prematurely.

In addition, the protrusions facilitate contact between the inner circumferential surface of the main body 100 and the outer surface of the bushing 20, so that foreign matters are separated from the outside in the space between the inner circumferential surface of the main body 100 and the outer surface of the bushing 20. You can block inflow. As a result, the life of the tracked vehicle can be extended.

11 is a perspective view showing a second example of the multi-link seals for track tracks according to another embodiment of the present invention. 12 is a cross-sectional view taken along the line IV-IV ′ shown in FIG. 11. FIG. 13 is a cross-sectional view showing that the link seal shown in FIG. 11 is mounted on a track.

11 and 12, the multi-link seal of the present invention has an O-ring-shaped main body 100. The main body 100 has a stepped portion 110 having a second surface 112 parallel to the first surface 111 that is perpendicular to the bottom surface of the main body 100. The main body 100 is made of an elastic body such as rubber.

An outer ring of the main body 100 has an O-ring-shaped sub body 200 '. The sub body 200 ′ has an area of an upper surface smaller than that of a bottom surface thereof. The sub body 200 ′ is formed with a curved first ′ inclined surface 220 ′ connected to the upper surface from an outer end of the bottom surface thereof. The sub body 200 ′ may be an O-ring in which the bottom surface is in close contact with a wider area than the second surface, and the inner circumference is in close contact with the first surface 111.

On the other hand, the inner circumferential surface of the main body 100 has a plurality of protrusions formed along the inner circumferential direction. The protrusions may be protrusions 160 protruding from the inner circumferential surface of the main body 100, and the protrusions 160 may gradually decrease in thickness toward the upper surface based on the bottom surface of the main body 100. have. That is, the end portion may be made sharp. The protrusions 160 may be formed side by side two.

Referring to FIG. 13, the link seal of the present invention in the free state shown in FIGS. 11 and 12 is fitted inside the group 25. Then, a predetermined force is applied to the inner side from the outside of the group 25. At this time, the bushing 20 is disposed on the inner side of the link seal. Thus, since the group 25 is compressed, the link seal is mounted to be compressed.

Subsequently, grease is injected into the space between the bushing 20 and the pin 10 and the driving force is fixed by a constant torque to complete the mounting of the link seal of the present invention.

At this time, as shown in Figure 13, the link seal of the present invention can be reduced in thickness by pressing.

Therefore, the grooves 150, which are protrusions formed on the inner circumferential surface of the main body 100, are in close contact with the outer surface of the bushing 20. In addition, the outer portion of the sub-body 200, which is fitted to the stepped portion 110 of the main body 100 may be compressed by the inner surface of the grung 25.

Here, the main body 100 is made of urethane, and the sub body 200 is made of rubber. This is because the urethane seal itself has a limit of elasticity, that is, cushioning force. Therefore, since the mutual disadvantages can be compensated for by using a combination of the wear-resistant urethane and the rubber which is an elastic body, by combining the rubber which is an rubber, the impact from the outside can be easily absorbed, and the rubber and the urethane are used. By doing so, wear resistance can be maintained.

In addition, since the end of the protrusion 160 that is the protrusion of the main body 100 is made sharp, grease may be injected between the protrusions 160. Accordingly, it is possible to maximize the cooling effect of the link seal itself, it is possible to reduce the phenomenon that the link seal wears early.

In addition, the protrusions 160 easily contact the inner circumferential surface of the main body 100 between the outer surfaces of the bushing 20 so that foreign matters from the outside in the space between the inner surface of the main body 100 and the bushing 20. This can be prevented from entering. As a result, the life of the tracked vehicle can be extended.

14 is a perspective view showing a third example of the multi-link seal for track tracks according to another embodiment of the present invention. FIG. 15 is a cross-sectional view along the line VV ′ shown in FIG. 14. 16 is a cross-sectional view showing that the link seal shown in FIG. 14 is mounted on a track.

Referring to Figures 14 and 15, the multi-link seal forms an O-ring shape, and has an inner body 300 made of urethane resin. The inner body 300 has a step 310 having a second 'surface 312 parallel to the first' surface 311 perpendicular to the bottom surface thereof.

Then, the outer body 400 of the elastic material such as rubber is fitted to the outer periphery of the inner body 300.

The outer body 400 is fitted to the step 310 such that its inner circumferential surface is in close contact with the first 'surface 311 and its bottom surface is in close contact with the second' surface 312.

In addition, the outer body 400 has an area of the upper surface is formed wider than the area of the bottom surface. Then, the stepped portion 410 is formed on the inner peripheral surface upper end. Then, a curved inclined surface 420 connected to the bottom surface from the side of the outer periphery may be formed.

On the other hand, the projection 360 is formed along the upper end of the inner circumferential surface of the inner body 300 to be located at the upper end of the first 'surface 311, the end of the projection 360 is formed to be pointed.

Referring to FIG. 13, the link seal of the present invention in the free state shown in FIGS. 11 and 12 is fitted inside the group 25. Then, a predetermined force is applied to the inner side from the outside of the group 25. At this time, the bushing 20 is disposed on the inner side of the link seal. Thus, since the group 25 is compressed, the link seal is mounted to be compressed.

Subsequently, grease is injected into the space between the bushing 20 and the pin 10 and the driving force is fixed by a constant torque to complete the mounting of the link seal of the present invention.

At this time, as shown in Figure 16, the link seal of the present invention can be reduced in thickness by pressing.

Therefore, the protrusion 360 formed along the upper end of the inner circumferential surface of the inner body 300 is in close contact with the outer surface of the bushing 20. In addition, the outer portion of the outer body 400 fitted to the step 310 of the inner body 300 may be compressed by the inner surface of the grung 25.

Here, the inner body 300 is made of urethane resin, the outer body 400 is made of rubber. This is because the urethane seal itself has a limit of elasticity, that is, cushioning force. Therefore, since the mutual disadvantages can be compensated for by using a combination of the wear-resistant urethane and the rubber which is an elastic body, by combining the rubber which is an rubber, the impact from the outside can be easily absorbed, and the rubber and the urethane are used. By doing so, wear resistance can be maintained.

In addition, since the end of the projection 360 of the inner body 300 is made sharp, grease may be injected between the projections 360. Accordingly, it is possible to maximize the cooling effect of the link seal itself, it is possible to reduce the phenomenon that the link seal wears early.

In addition, the protrusion 360 is easily brought into close contact between the inner circumferential surface of the inner body 300 and the outer surface of the bushing 20, so that foreign matter from the outside in the space between the inner circumferential surface of the inner body 100 and the bushing 20. This can be prevented from entering. As a result, the life of the tracked vehicle can be extended.

According to the configuration of the multi-link seal of the present invention carried out as described above, since there is no gap in the upper one side of the site to which the load is applied to the multi-link seal, impurities or foreign substances such as water and earth and sand do not flow between the pin and the bushing At this time, the grease injected between the pin and the bushing is not deformed due to the inflow of impurities or foreign substances, thereby preventing the swelling of the pin and the surface of the bushing and preventing swelling of the rust. In general, the operation of the tracked vehicle is smooth.

In addition, the protrusions or protrusions can minimize the initial friction when the multi-link seal is mounted on the track.

Finally, in the configuration of the multi-link seals in accordance with the present invention can be variously modified and can take various forms.

It is to be understood, however, that the present invention is not limited to the specific forms referred to in the above description, but rather includes all modifications, equivalents and substitutions within the spirit and scope of the invention as defined by the appended claims. It should be understood to do.

As described above, the present invention is a projection formed on the inner peripheral surface of the main body is in close contact with the outer surface of the bushing, such as earth and water from the outside in the space between the bushings and the space between the bushings and the pins in close contact with the link seal It is effective to block the inflow of impurities or foreign substances.

In addition, the present invention has the effect of minimizing the phenomenon that the link seal is worn early by maximizing the cooling effect of the link seal by forming a groove shape and the shape of the projection and grease can be injected therein.

In addition, the present invention has the effect that the deformation of the grease injected between the bushing and the pin of the link is prevented to reduce the noise and extend the life of the overall tracked vehicle.

In addition, the present invention is produced by the main body made of urethane, by manufacturing the server body coupled to the rubber with rubber, the cushioning due to the wear resistance and rubber due to the urethane is maximized, the normal role of the spring to perform the role of It is possible to minimize frictional heat between the link seal and the bushing during operation due to excessive crimping during the operation of the tracked vehicle.In case of stopping the operation of the vehicle after driving the tracked vehicle for a long time, The inflow is blocked and the surface corrosion of the pin and the bushing is prevented, and the seizure due to the prevention of rust expansion is prevented in advance, so that the operation of the entire track vehicle is smoothly performed.

Claims (8)

An O-ring-shaped main body having a stepped portion having a second surface parallel to a first surface perpendicular to the bottom surface of the outer periphery; It is disposed on the outer periphery of the main body, and includes a sub body fitted to the step portion such that the inner peripheral surface is in close contact with the first surface and the bottom surface is in close contact with the second surface, The sub body has an area of an upper surface thereof wider than an area of its bottom surface, a first stepped portion is formed at an upper end of the inner circumferential surface thereof, and a curved first inclined surface connected to the bottom surface of the sub body from a side of the outer circumference thereof. It is formed, the bottom surface of the sub-body is in close contact with the substantially the same area and the second surface, the inner peripheral surface is a multi-ring seal for track tracks, characterized in that the O-ring is in close contact with a portion of the first surface. delete An O-ring-shaped main body having a stepped portion having a second surface parallel to a first surface perpendicular to the bottom surface of the outer periphery; It is disposed on the outer periphery of the main body, and includes a sub body fitted to the step portion such that the inner peripheral surface is in close contact with the first surface and the bottom surface is in close contact with the second surface, The sub body has an area of the upper surface smaller than that of the bottom surface, and a curved first 'inclined surface is formed from an outer end of the bottom surface to be connected to the upper surface, and the bottom of the sub body is smaller than the second surface. A multi-link seal for track tracks, characterized in that the O-ring is in close contact with a large area, the inner circumferential surface is in close contact with substantially the same area as the first surface. The method according to claim 1 or 3, Multi-link seals for track tracks, characterized in that the inner circumferential surface of the main body has a plurality of protrusions formed along the inner circumferential direction. The method of claim 4, wherein The protrusion is a multi-link seal for track tracks, characterized in that the grooves dug at a predetermined depth from the inner circumferential surface of the main body to the outer peripheral direction. The method of claim 4, wherein The protrusions are protrusions protruding from an inner circumferential surface of the main body, and the protrusions are gradually reduced in thickness toward an inner side with respect to the inner circumferential surface of the main body. delete delete

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