Track Link Plate and Track Link Assembly Using the Same

Abstract

To provide a track link plate.SOLUTION: A track link plate for connecting at least two pin assemblies including pin sleeves and pin bolts inserted into respective pin sleeves includes a body, a first shaft hole penetrating through a first end of the body to allow a pin sleeve to be inserted thereinto, a second shaft hole penetrating through a second end of the body to allow a pin bolt to be inserted thereinto, two through holes provided between the first shaft hole and the second shaft hole with an interval to penetrate through the body along a first axial direction of the first shaft hole, a support lib located between the two through holes, and a first extension part projecting outward from a second face of the body and located between a rotating inner edge of the body and an edge part of the through hole to extend from a second end to a first end. A distance from the edge part of the first extension part to the rotating inner edge is larger than or equal to 1 / 3 of the total height of the body. This can reinforce the strength of the track link plate.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a track link plate and a track link assembly, and particularly to a track link plate and a track link assembly applied to an automotive vehicle.

Background Art

[0002] Track links are connected in series such that a plurality of track link plates are rotatable relative to each other within a certain width so as to have deformable characteristics. Even in a hilly area, the contact area with the ground can still be maintained to keep the thrust, so they are widely applied to high-load heavy machinery. A track link plate usually has two shaft holes into which a pin assembly is inserted so as to be connected in series, and a through hole is provided between the two shaft holes so as to provide space necessary for the assembly of a track shoe. In a conventional track link plate, in order to reduce costs and weight, not only the thickness of the main body is reduced, but also the through hole is enlarged as much as possible. As a result, the structural strength of the track link plate is reduced, and the track link plate is often broken by special terrain or a suddenly increased load, which not only causes a cost loss due to the elimination of the track link plate itself, but also requires a considerable amount of time for the replacement work related thereto.

[0003] Refer to FIGS. 8 and 9. FIG. 8 is a side view showing a conventional track link plate 11. FIG. 9 is a cross-sectional view taken along the cross-section line 9-9 of the conventional track link plate 11 in FIG. 8. The conventional track link plate 11 is mainly used for motor vehicles. Referring to FIGS. 8 and 9, the conventional track link plate 11 includes a main body, a first shaft hole 112, and a second shaft hole 114. The first shaft hole 112 penetrates one end of the main body, and the second shaft hole 114 penetrates the other end of the main body. The first shaft hole 112 and the second shaft hole 114 are respectively used to connect a pin bolt and a pin sleeve. Also, as shown in FIG. 9, the inner hole edge and the outer hole edge of the conventional first shaft hole 112 are parallel to each other, indicating that the thickness of the main body around the first shaft hole 112 is uniform. When a plurality of track link plates 11 are combined with a pin assembly structure to form a track link, the track link plates 11 can rotate relative to each other. The inner hole edge of the first shaft hole 112 is the main structure for transmitting the traction force of the outer gear to the pin assembly. Since the inner hole edge of the first shaft hole 112 has to bear most of the force, when the load is too large, or when the change in the power source during acceleration or deceleration is too drastic, the inner hole edge of the first shaft hole 112 cannot withstand the instantaneous impact force and is prone to cracking. If the cracking situation occurs during the operation of large machinery, it will cause considerable danger, and the subsequent related replacement work will also be quite laborious and time-consuming, further impacting the operator's working cost.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention has been made in view of the above, and its object is to provide a track link plate capable of reinforcing its mechanical structure to extend the service life of the track link plate and enhancing its strength, and a track link assembly using the same.

Means for Solving the Problems

[0005] In a track link plate according to an embodiment of the present invention, it is a track link plate for connecting at least two pin assemblies including a pin sleeve and a pin bolt inserted into each of the pin sleeves, and includes a main body, a first shaft hole that penetrates the first end of the main body and into which the pin sleeve of one of the pin assemblies is inserted from the first surface of the main body, a second shaft hole that penetrates the second end of the main body and into which the pin bolt of the other pin assembly is inserted from the first surface, two through holes provided at intervals between the first shaft hole and the second shaft hole and penetrating the main body along the first axial direction of the first shaft hole, a support rib located between the two through holes, and a first extension portion that protrudes outward from the second surface of the main body and is located between the inner rotational edge of the main body and the edge of each of the through holes and extends from the second end to the first end. The distance from the inner rotational edge of the main body to the outer rotational edge of the main body is the total height, and the distance from each edge of the first extension portion to the inner rotational edge is greater than or equal to 1 / 3 of the total height.

[0006] Thereby, the strength of the track link plate can be reinforced by the structural arrangement of the first extension portion.

[0007] The track link plate of the present invention further includes two mounting holes that penetrate the outer rotational edge outward from each of the through holes.

[0008] In the track link plate of the present invention, the distance from the edge of each through hole of the first extension portion to the inner rotational edge is greater than the minimum distance from the first shaft hole to the inner rotational edge.

[0009] The track link plate of the present invention further includes a protruding portion that protrudes annularly from the second surface along the second axial direction of the second shaft hole, and a second extension portion that is located on the second surface and extends radially from the outer annular surface of the protruding portion to the first shaft hole.

[0010] In the track link plate of the present invention, an annular groove recessed in the first surface of the main body along the second axial direction of the second shaft hole is further included so as to communicate with the second shaft hole.

[0011] In the track link plate of the present invention, a reinforcing portion extending outward from the first surface along the first axial direction and adjacent to the first shaft hole is further included.

[0012] In a track link assembly according to different embodiments of the present invention, at least two pin assemblies including a pin sleeve and a pin bolt inserted into each of the pin sleeves, a main body, a first shaft hole penetrating through a first end of the main body, a second shaft hole penetrating through a second end of the main body, two through holes provided at an interval between the first shaft hole and the second shaft hole and penetrating through the main body along the first axial direction of the first shaft hole, a support rib located between the two through holes, and a first extension portion protruding outward from a second surface of the main body and located between a rotation inner edge of the main body and an edge portion of each of the through holes and extending from the second end to the first end, wherein a distance from the rotation inner edge of the main body to a rotation outer edge of the main body is a total height, and a distance from each edge portion of the first extension portion to the rotation inner edge is at least two track link plates greater than or equal to 1 / 3 of the total height, and one of the pin assemblies is drilled from a first surface of one of the track link plates into the first shaft hole of one of the track link plates, while the other pin assembly is drilled from the first surface of the other track link plate into the first shaft hole of the other track link plate and then into the second shaft hole of one of the track link plates, and the pin bolt of the other pin assembly is inserted into the second shaft hole of one of the track link plates.

[0013] Thereby, the strength of the entire track link assembly can be reinforced by the structure in which the first extension portion is arranged on the track link plate.

[0014] In the track link assembly of the present invention, each of the track link plates further includes two mounting holes that penetrate the rotational outer edge outward from each of the through holes.

[0015] In the track link assembly of the present invention, each of the track link plates further includes a protrusion that protrudes annularly from the second surface along the second axial direction of the second shaft hole, and a second extension portion that is located on the second surface and extends radially from the outer annular surface of the protrusion to the first shaft hole.

[0016] In the track link assembly of the present invention, each of the track link plates further includes an annular groove that is recessed in the first surface of the main body along the second axial direction of the second shaft hole so as to communicate with the second shaft hole. When one end of the pin sleeve of the other pin assembly is provided to be accommodated in the annular groove, the pin bolt of the other pin assembly is inserted into the second shaft hole.

[0017] In the track link assembly of the present invention, each of the track link plates further includes a reinforcing portion that extends outward from the first surface along the first axial direction and is adjacent to the first shaft hole.

[0018] In the track link assembly of the present invention, each of the pin assemblies further includes at least two dust rings. One of the dust rings is fitted to one end of the pin bolt, while the other dust ring is fitted to the other end of the pin bolt. Each of the dust rings is pressed by each annular groove and attached to the end face of each pin sleeve.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Mode for Carrying Out the Invention

[0020] Hereinafter, a track link plate according to an embodiment of the present invention and a track link assembly using the same will be described with reference to the drawings. For the sake of clarity in the description, several practical details will be described together in the following description. However, the reader should understand that these practical details do not limit the present invention. That is, these practical details are not necessary for some embodiments of the present invention. In addition, for the sake of simplifying the drawings, some conventionally well - used structures and elements are shown in a simplified manner, and overlapping elements can be denoted by the same or similar numbers.

[0021] In the present text, when an element (or mechanism, module, etc.) is "connected", "installed", or "coupled" to another element, it may refer to the element being directly connected, directly installed, or directly coupled to the other element, or it may refer to the element being indirectly connected, indirectly installed, or indirectly coupled to the other element, that is, it means that another element is interposed between the element and the other element. When it is clearly indicated that an element is "directly connected", "directly installed", or "directly coupled" to another element, it indicates that no other element is interposed between the element and the other element. Terms such as "first", "second", "third", etc. are merely for describing different elements or components and do not limit the element / component itself, so the first element / component may be re - named as the second element / component. Moreover, the combination of elements / components / mechanisms / modules in the present text is not a generally known, ordinary or conventional combination in this field, and it is not possible to determine whether the combination relationship can be easily completed by those skilled in the art depending on whether the element / component / mechanism / module itself is conventional.

[0022] Refer to FIGS. 1, 2, and 3. FIG. 1 is a perspective view schematically showing a track link plate 10 according to an embodiment of the present invention. FIG. 2 is a side view showing the track link plate 10 according to the embodiment of FIG. 1. FIG. 3 is a cross-sectional view taken along the section line 3-3 of the track link plate 10 according to the embodiment of FIG. 1. Referring to FIGS. 1 to 3, the track link plate 10 includes a main body (not particularly numbered), a first shaft hole 110, a second shaft hole 120, two through holes 170, a support rib 180, and a first extension portion 140. The first shaft hole 110 penetrates the first end of the main body, and the second shaft hole 120 penetrates the second end of the main body. The two through holes 170 are provided at intervals between the first shaft hole 110 and the second shaft hole 120 and penetrate the main body along the first axial direction i1 of the first shaft hole 110. The support rib 180 is located between the two through holes 170. The first extension portion 140 protrudes outward from the second surface 1004 of the main body and is located between the inner rotation edge 1001 of the main body and the edge 171 of the through hole 170, and extends from the second end to the first end. The track link plate 10 may further include a rotation outer edge 1002 located on the main body so as to face the inner rotation edge 1001 for connecting a track shoe (not shown). The distance from the inner rotation edge 1001 to the outer rotation edge 1002 of the main body is the total height H of the track link plate 10, and the distance D1 from the edge 171 of the first extension portion 140 to the inner rotation edge 1001 is greater than or equal to 1 / 3 of the total height H. The track link plate 10 of the embodiment of FIG. 1 is used to connect at least two pin assemblies 210 (see FIG. 4). Each pin assembly 210 includes a pin sleeve 211 (see FIG. 4) and a pin bolt 212 (see FIG. 4). Each pin bolt 212 is inserted into each pin sleeve 211. In the first shaft hole 110, the pin sleeve 211 of one pin assembly 210 is inserted from the first surface 1003 of the main body. In the second shaft hole 120, the pin bolt 212 of another pin assembly 210 is inserted from the first surface 1003. The detailed connection relationship between the track link plate 10 and the pin assembly 210 will be described in detail in the following embodiments.

[0023] By increasing the thickness between the first shaft hole 110 and the second shaft hole 120 of the main body through the structural arrangement of the first extension part 140, the strength of the track link plate 10 can be reinforced.

[0024] Specifically, the distance D1 from the edge 171 of each through hole 170 of the first extension part 140 to the inner rotation edge 1001 is greater than the minimum distance D2 from the first shaft hole 110 to the inner rotation edge 1001. Since the inner rotation edge 1001 is close to the biasing end of the sprocket, by increasing the thickness of the first extension part 140, the rigidity of the main body can be improved.

[0025] Each track link plate 10 may further include a protrusion 130 and a second extension part 150. The protrusion 130 protrudes annularly from the second surface 1004 along the second axial direction i2 of the second shaft hole 120, and the structural strength around the second shaft hole 120 can be increased. The second extension part 150 is located on the second surface 1004 and extends radially from the outer annular surface 1301 of the protrusion 130 to the first shaft hole 110. As shown in FIG. 2, a part of the second extension part 150 may extend to the first extension part 140 so as to reduce the step between the protrusion 130 and the first extension part 140.

[0026] As shown in FIG. 3, one surface of the support rib 180 is aligned with the outermost edge of the first surface 1003 of the track link plate 10, that is, the two form a smooth continuous surface. This arrangement reduces the structural step, avoids stress concentration at the structural connection part, increases its cross-sectional area to reinforce the supporting force, can achieve effective space utilization, and can also reduce the complexity of the corresponding mold.

[0027] As shown in FIG. 1, the track link plate 10 may further include two mounting holes 190. Each mounting hole 190 penetrates the rotational outer edge 1002 outward from each through hole 170. A locking member (not shown) may penetrate the mounting hole 190, whereby the track shoe is firmly joined to the track link plate 10 and interlocks with the track link plate 10. The track shoe is a consumable item that directly contacts the road surface instead of the track link plate 10 and may be replaced with a corresponding specification according to the actual situation. Also, the through holes 170 can not only reduce the weight of the track link plate 10 but also make the replacement work of the track shoe easier.

[0028] As shown in FIG. 3, the track link plate 10 may further include an annular groove 160 recessed in the first surface 1003 of the body along the second axial direction i2 of the second shaft hole 120 so as to communicate with the second shaft hole 120. Thereby, it contributes to the positioning of the pin sleeve 211, and the details will be described in later embodiments.

[0029] Also, referring to FIGS. 1, 6, and 12, each track link plate 10 may further include a reinforcing portion 100 extending outward from the first surface 1003 along the first axial direction i1 and adjacent to the first shaft hole 110. The inner arc surface of the reinforcing portion 100 may be integrally connected to a part of the hole wall of the first shaft hole 110 so as to reinforce the ability of the inner hole edge of the first shaft hole 110 to withstand impacts.

[0030] With reference to FIGS. 1 to 3, further refer to FIGS. 4 to 6. FIG. 4 is a perspective view schematically showing a part of a track link assembly according to another embodiment of the present invention. FIG. 5 is a side view showing a part of the track link assembly according to the embodiment of FIG. 4. FIG. 6 is a plan view showing a part of the track link assembly according to the embodiment of FIG. 4. The number of links of the track link assembly may be selected according to the actual usage situation, and only two links are shown in the drawings. Referring to FIGS. 1 to 6, the track link assembly includes at least two pin assemblies 210 and at least two track link plates 10. Each pin assembly 210 includes a pin sleeve 211 and a pin bolt 212 inserted into the pin sleeve 211. The structure of each track link plate 10 is similar to that of the embodiment of FIG. 1 described above, but the present invention is not limited thereto. Specifically, the track link plate 10 includes a main body, a first shaft hole 110, a second shaft hole 120, two through holes 170, a support rib 180, and a first extension 140. The first shaft hole 110 penetrates the first end of the main body. The second shaft hole 120 penetrates the second end of the main body. The two through holes 170 are provided at intervals between the first shaft hole 110 and the second shaft hole 120 and penetrate the main body along the first axial direction i1 of the first shaft hole 110. The support rib 180 is located between the two through holes 170. The first extension 140 protrudes outward from the second surface 1004 of the main body and is located between the inner rotation edge 1001 of the main body and the edge 171 of the through hole 170, and extends from the second end to the first end. The distance from the inner rotation edge 1001 to the outer rotation edge 1002 of the main body is the total height H of the track link plate 10, and the distance D1 from the edge 171 of the first extension 140 to the inner rotation edge 1001 is greater than or equal to 1 / 3 of the total height H.One of the pin assemblies 210 is drilled from the first surface 1003 of one track link plate 10 into the first shaft hole 110 of the one track link plate 10. However, the other pin assembly 210 is drilled from the first surface 1003 of the other track link plate 10 into the first shaft hole 110 of the other track link plate 10 and then into the second shaft hole 120 of the one track link plate 10, and the pin bolt 212 of the other pin assembly 210 is inserted into the second shaft hole 120 of the one track link plate 10.

[0031] Refer to FIG. 7 in conjunction with FIG. 4. FIG. 7 is a cross-sectional view showing a part of the track link assembly according to the embodiment of FIG. 6. Referring to FIGS. 4 and 7, in the track link assembly, a plurality of track link plates 10 are connected in series by a pin assembly 210 and are driven to apply a thrust to the road by the rotation of a sprocket to move a motor vehicle. Compared with wheels, it can adhere better to a rough road and adapt to diversified terrains. Each section of the track link assembly is also formed by connecting two track link plates 10 whose structures are symmetric to each other by a pin assembly 210. That is, the protrusions 130, the first extension portions 140, and the second extension portions 150 of the oppositely connected track link plates 10 are all geometrically symmetric. Each track link plate 10 may further include an annular groove 160 recessed in the first surface 1003 of the body along the second axial direction i2 of the second shaft hole 120 so as to communicate with the second shaft hole 120. When one end of the pin sleeve 211 of the pin assembly 210 is provided to be received in the annular groove 160, the pin bolt 212 of the pin assembly 210 passes through the pin sleeve 211 and is inserted into the second shaft hole 120. That is, the pin sleeve 211 of the pin assembly 210 penetrates the first shaft hole 110 along the first axial direction i1 from the first surface 1003 and protrudes from the second surface 1004 of the track link plate 10. The protruding end of the pin sleeve 211 is subsequently inserted into the annular groove 160 of the other track link plate 10. The pin bolt 212 of the pin assembly 210 passes through the pin sleeve 211 along the first axial direction i1 and is subsequently inserted into the second shaft hole 120 of another track link plate 10. In this way, a plurality of track link plates 10 can be connected in series as a track link assembly.

[0032] Specifically, the second shaft hole 120 may have a stopper portion 1201 that is pressed by a pin bolt 212 at a portion close to the outside of the track link plate 10 of the protruding portion 130. As shown in FIGS. 3 and 7, the stopper portion 1201 is located at one end away from the annular groove 160 of the second shaft hole 120. The hole diameter R1 of the stopper portion 1201 is smaller than the hole diameter R2 of the second shaft hole 120, and its dimension and the outer diameter of the pin bolt 212 are an interference fit. The end portion of the pin bolt 212 may have a chamfer. When the pin bolt 212 is inserted into the second shaft hole 120 from the first surface 1003, the end portion of the pin bolt 212 is pressed against the stopper portion 1201 and does not protrude from the track link plate 10. When the track link assemblies are connected in series, the stopper portion 1201 can prevent the pin bolt 212 from shifting left and right between the track link plates 10 on both sides. In other embodiments, the stopper portion may be designed as a chamfer, but the present invention is not limited thereto.

[0033] As shown in FIGS. 6 and 7, each pin assembly 210 may further include at least two dust rings 213. One dust ring 213 is fitted to one end of the pin bolt 212, while the other dust ring 213 is fitted to the other end of the pin bolt 212. Each dust ring 213 is pressed by each annular groove 160 and attached to the end face of each pin sleeve 211. Grease is usually applied between the pin sleeve 211 and the pin bolt 212 to reduce the frictional force so that the track link plates 10 can roll relative to each other smoothly. Due to the elastic deformation of the dust ring 213, its inner edge tightly covers the surface of the pin bolt 212, preventing the leakage of grease and at the same time avoiding the intrusion of external mud or dust between the pin bolt 212 and the pin sleeve 211, which may cause the grease to become dirty and hardened.

[0034] Refer to FIGS. 10, 11 and 12. FIG. 10 is a perspective view schematically showing a track link assembly according to another embodiment of the present invention. FIG. 11 is a side view showing a track link plate 21 according to the embodiment of FIG. 10. FIG. 12 is a cross-sectional view taken along the section line 12-12 of the track link plate 21 according to the embodiment of FIG. 11. Referring to FIGS. 10 to 12, the track link assembly has at least two pin assemblies 22 and at least two track link plates 21. Each pin assembly 22 includes a pin sleeve 221 and a pin bolt 222, and each pin bolt 222 is inserted into each pin sleeve 221. Each track link plate 21 includes a main body, a first shaft hole 230, a reinforcing portion 240, and a second shaft hole 214. The first shaft hole 230 penetrates the first end of the main body. The reinforcing portion 240 extends outward from the first surface 2111 of the main body along the first axial direction i1 of the first shaft hole 230 and is adjacent to the first shaft hole 230. The second shaft hole 214 penetrates the second end of the main body. However, one pin assembly 22 is drilled from the first surface 2111 of one track link plate 21 into the first shaft hole 230 of one track link plate 21. The other pin assembly 22 is drilled from the first surface 2111 of the other track link plate 21 into the first shaft hole 230 of the other track link plate 21 and then into the second shaft hole 214 of one of the track link plates 21. The pin bolt 222 of the other pin assembly 22 is inserted into the second shaft hole 214 of one of the track link plates 21. By analogy, the pin assemblies 22 connect the track link plates 21 in series with each other.

[0035] Specifically, the reinforcing portion 240 may be integrally formed with the main body during forging or casting, and its inner arc surface 2131 is integrally connected to at least a part of the hole wall of the first shaft hole 230. However, in other embodiments, the reinforcing portion 240 may be adjacent to the first shaft hole 230 and may be located on the side facing the sprocket when combined with the sprocket, but the present invention is not limited thereto. The track link plate 21 may further include an annular groove 216 recessed in the first surface 2111 of the main body along the second axial direction i2 (see FIG. 13) of the second shaft hole 214 so as to communicate with the second shaft hole 214. When one end of the pin sleeve 221 of the other pin assembly 22 is provided to be received in the annular groove 216, the pin bolt 222 of the other pin assembly 22 is inserted into the second shaft hole 214. The track link plate 21 may further include a protruding portion 215 protruding annularly from the second surface 2112 of the main body along the second axial direction i2 of the second shaft hole 214. A jack 2151 communicating with the second shaft hole 214 is defined by the annular surface inside the protruding portion 215.

[0036] The weight of the load that the user may apply during operation cannot be predicted. However, those skilled in the art can still reduce the impact force on each shaft hole of the conventional load by lightening the track link plate 21. Therefore, the main body may further include at least one through hole 217 that is located between the first shaft hole 230 and the second shaft hole 214 and penetrates the main body in a direction parallel to the first axial direction i1. Without affecting the structural strength of the track link plate 21, the weight can be reduced. In FIGS. 3 and 4, there are two through holes 217, but the shape, number, and dimensions of the through holes 217 can be arbitrarily changed according to actual usage conditions, and the present invention is not limited thereto.

[0037] Refer to FIGS. 13 and 14 in combination with FIGS. 10 and 11. FIG. 13 is a cross-sectional view of a part of the track link assembly according to the embodiment of FIG. 10 as seen from above. FIG. 14 is an enlarged view showing a part of the track link assembly according to the embodiment of FIG. 13. Referring to FIGS. 13 and 14, each pin assembly 22 may further include at least two dust rings 223, one of the dust rings 223 being fitted at one end of the pin bolt 222, while the other dust ring 223 being fitted at the other end of the pin bolt 222. When combined with the track link plate 21, the two dust rings 223 are respectively pressed by two annular grooves 216 and attached to the end faces of the respective pin sleeves 221. Therefore, during the operation of the track link assembly, due to the elasticity of each dust ring 223, it is possible to absorb a slight shift of each pin assembly 22 relative to each track link plate 21 in the first axial direction i1 (see FIG. 12).

[0038] There may be two or more track link plates 21 and pin assemblies 22 respectively. When combining, one end of the pin bolt 222 is passed through the pin sleeve 221 and further fitted into the dust ring 223, then passed through the first axial hole 230 of one of the track link plates 21, and subsequently inserted into the second axial hole 214 of the other track link plate 21 to connect the two track link plates 21 in series. By analogy, a plurality of track link plates 21 can be connected. Next, a plurality of track link plates 21 connected in series and a plurality of track link plates 21 corresponding to the number are provided symmetrically, and the reinforcing portions 240 of each track link plate 21 are provided towards the outer rotation edge of the track link assembly, that is, each reinforcing portion 240 is close to the meshing position of each pin sleeve 221 and the outer teeth of the sprocket. Thereby, the ability to withstand the impact on the inner hole edge of the first axial hole 230 is enhanced.

[0039] In addition, each pin assembly 22 may further include grease (not shown) provided between the pin sleeve 221 and the pin bolt 222. By reducing the frictional force between the pin sleeve 221 and the pin bolt 222 with the grease, the power source from the drive sprocket can be transmitted more efficiently while allowing the track link plates 21 to roll relative to each other more smoothly. On the other hand, if an inappropriate angle occurs between the track link plates 21, the inner hole edges of the first shaft hole 230 or the second shaft hole 214 cannot withstand the impact force uniformly, which may further affect the service life of the track link assembly. This can be avoided.

[0040] The track link plate and the track link assembly of the present invention, by the structural arrangement of the first extension portion and the second extension portion, align one surface of the support rib with the first surface of the track link plate so as to reduce the structural step, avoid stress concentration, reinforce the strength of the track link plate to withstand the load, and further extend the service life of the track link plate and the track link assembly.

[0041] Although the present invention is disclosed by the above embodiments, the embodiments do not limit the present invention. Those with ordinary knowledge in the technical field can implement it in various forms without departing from the gist. Therefore, the protection scope of the present invention is limited based on the scope of the claims.

Explanation of Reference Numerals

[0042] 10, 21 Track link plate 100, 240 Reinforcement portion 1001 Rotating inner edge 1002 Rotating outer edge 1003, 2111 First surface 1004, 2112 Second surface 11 Conventional track link plate 110, 112, 230 First shaft hole 114, 120, 214 Second shaft hole 1201 Stopper portion 130 and 215 protrusions 1301 outer annular surface 140 first extension 150 second extension 160 and 216 annular grooves 170 and 217 through holes 171 edge 180 support rib 190 mounting hole 210 and 22 pin assemblies 211 and 221 pin sleeves 212 and 222 pin bolts 213 and 223 dust rings 2131 inner arc surface 2151 jack D1 distance D2 minimum distance i1 first axial direction i2 second axial direction H total height R1 and R2 hole diameters

Claims

1. A track link plate for connecting at least two pin assemblies including a pin sleeve and a pin bolt inserted into each said pin sleeve, a main body, a first shaft hole penetrating through the first end of the main body and into which the pin sleeve of one of the said pin assemblies is inserted from the first surface of the main body, a second shaft hole penetrating through the second end of the main body and into which the pin bolt of the other of the said pin assemblies is inserted from the first surface, two through holes provided at an interval between the first shaft hole and the second shaft hole and penetrating through the main body along the first axial direction of the first shaft hole, a support rib located between the two through holes, a first extension protruding outward from the second surface of the main body and located between the inner rotational edge of the main body and the edge of each of the through holes, extending from the second end to the first end, comprising, the distance from the inner rotational edge of the main body to the outer rotational edge of the main body is the total height, and the distance from each edge of the first extension to the inner rotational edge is greater than or equal to 1 / 3 of the total height, a track link plate.

2. The track link plate according to claim 1, further comprising two mounting holes penetrating through the outer rotational edge from outside each of the through holes.

3. The track link plate according to claim 1, wherein the distance from each edge of the through hole of the first extension to the inner rotational edge is greater than the minimum distance from the first shaft hole to the inner rotational edge.

4. a protruding portion protruding annularly from the second surface along the second axial direction of the second shaft hole, and a second extension located on the second surface and extending radially from the outer annular surface of the protruding portion to the first shaft hole. The track link plate according to claim 1 further comprises these.

5. The track link plate according to claim 1, further comprising an annular groove recessed in the first surface of the main body along the second axial direction of the second shaft hole so as to communicate with the second shaft hole.

6. The track link plate according to claim 1, further comprising a reinforcing portion extending outward from the first surface along the first axial direction and adjacent to the first shaft hole.

7. At least two pin assemblies including a pin sleeve and a pin bolt inserted into each said pin sleeve, a main body, a first shaft hole penetrating through a first end of the main body, a second shaft hole penetrating through a second end of the main body, two through holes provided at an interval between the first shaft hole and the second shaft hole and penetrating the main body along a first axial direction of the first shaft hole, a support rib located between the two through holes, a first extension portion protruding outward from a second surface of the main body and located between a rotation inner edge of the main body and an edge portion of each of the through holes and extending from the second end to the first end, wherein a distance from the rotation inner edge to a rotation outer edge of the main body is a total height, and a distance from each edge portion of the first extension portion to the rotation inner edge is at least two track link plates greater than or equal to 1 / 3 of the total height. comprising One of the pin assemblies is drilled from a first surface of one of the track link plates into the first shaft hole of one of the track link plates, while the other pin assembly is drilled from the first surface of the other track link plate into the first shaft hole of the other track link plate, and then into the second shaft hole of one of the track link plates, and the pin bolt of the other pin assembly is inserted into the second shaft hole of one of the track link plates.

8. Each of the track link plates The track link assembly according to claim 7, further comprising two mounting holes penetrating the rotation outer edge outward from each of the through holes.

9. Each of the track link plates a protruding portion protruding annularly from the second surface along a second axial direction of the second shaft hole; The track link assembly according to claim 7, further comprising a second extension portion located on the second surface and extending radially from an outer annular surface of the protruding portion to the first shaft hole.

10. Each of the track link plates The track link assembly according to claim 7, further comprising an annular groove recessed in the first surface of the main body along a second axial direction of the second shaft hole so as to communicate with the second shaft hole, and when one end of the pin sleeve of the other pin assembly is provided to be received in the annular groove, the pin bolt of the other pin assembly is inserted into the second shaft hole.

11. Each of the track link plates The track link assembly according to claim 7, further comprising a reinforcing portion extending outward from the first surface along the first axial direction and adjacent to the first axial hole.

12. Each of the pin assemblies further includes at least two dust rings, one of the dust rings being fitted to one end of the pin bolt, and the other dust ring being fitted to the other end of the pin bolt. Each of the dust rings is pressed by each annular groove and attached to the end surface of each pin sleeve. The track link assembly according to claim 7.

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