Caterpillar track section assembly, caterpillar track system and engineering machinery

Abstract

The utility model relates to a caterpillar track section assembly, a caterpillar track system comprising the caterpillar track section assembly and corresponding engineering machinery. The caterpillar track section assembly comprises a left caterpillar track section, a right caterpillar track section and a pin shaft. The left caterpillar track section comprises a left base body and a first left hole; the right caterpillar track section comprises a right base body and a first right hole; the pin shaft is mounted in the first left hole and the first right hole; a detachable locking structure is arranged at the position where the pin shaft makes contact with the left base body and / or the right base body, and the locking structure is configured to be inserted into the left base body and / or the right base body so as to prevent the pin shaft installed in the first left hole and / or the first right hole from moving in the corresponding hole in the axial direction. According to the caterpillar track section assembly, the locking structure is formed at the position where the left base body and / or the right base body are / is in contact with the pin shaft, the locking structure can prevent the pin shaft from horizontally moving in the axial direction relative to the left base body and / or the right base body, and then the risk of pin shifting of a caterpillar track can be avoided.

Description

Technical Field

[0001] The present disclosure relates generally to ground engaging track systems for work machines, and more particularly to track link assemblies for use with track systems. Background Art

[0002] Engineering machinery such as bulldozers and excavators often use crawler tracks as ground-engaging propulsion elements. Such crawler tracks usually include multiple pairs of track links connected in a ring shape and track shoes fixed to the track links, each pair of track links includes left and right track links constructed and arranged in a mirror-symmetrical manner, and the two track links are connected to each other and to an adjacent pair of track links through a pin bushing and a pin shaft.

[0003] In the prior art, the symmetrically arranged left and right track segments are connected at one end by a pin sleeve fixed in their corresponding pin sleeve holes, and the pin shaft can be inserted into the pin sleeve. The other ends of the left and right track segments are respectively provided with through holes, and the pin shaft extends from both ends of the pin sleeve and passes through the through holes to connect a pair of adjacent track segments in an interference fit manner. However, when this connection method of the track segment and the pin shaft is applied to large or super-large excavators, the pin shaft is prone to vibrate and fall out of the track segment under harsh working conditions and heavy load operations (i.e., the phenomenon of cross-pinning). In severe cases, it may even cause the pin shaft to break and the crawler track cannot continue to work. Utility Model Content

[0004] The purpose of the present disclosure is to solve at least one of the above problems and / or other problems existing in the prior art.

[0005] On the one hand, the present disclosure provides a track link assembly, the track link assembly comprising a left track link, a right track link which is constructed in a mirror-symmetrical manner with the left track link and is arranged spaced apart from the left track link, and a pin. The left track link comprises a left base and a first left hole formed at a first end of the left base; the right track link comprises a right base and a first right hole formed at a first end of the right base; the pin is installed in the first left hole and the first right hole in an interference fit manner; wherein a detachable locking structure is provided at a position where the pin contacts the left base and / or the right base, the locking structure being configured to be inserted in the left base and / or the right base so as to prevent the pin installed in the first left hole and / or the first right hole from moving axially in the corresponding hole.

[0006] Advantageously, the locking structure comprises a socket passing through the left base and / or the right base and leading into the corresponding first left hole and / or the first right hole, a locking column that can be inserted into the socket and engage the pin shaft, and a recess arranged on the pin shaft for receiving the locking column.

[0007] Advantageously, the recess is constituted by a semicircular groove cut around the entire periphery of the pin.

[0008] Advantageously, the top end of the locking column is provided with an internal thread for engaging an operating tool.

[0009] Advantageously, the hole has an internal thread and the locking column has a matching external thread.

[0010] Advantageously, the locking structure further comprises a rubber plug, which is inserted into the insertion hole to seal the locking column.

[0011] Advantageously, the left base body has a flat left top surface, the right base body has a flat right top surface, and the insertion hole is formed on the left top surface and / or the right top surface.

[0012] Advantageously, the locking pin is formed by a cylindrical pin of standard size, for example a standardized threaded cylindrical pin made according to the GB120 standard.

[0013] The chain track link assembly disclosed in the present invention forms a locking structure at the position where the left base and / or the right base respectively contacts the pin shaft. The locking structure prevents the pin shaft from translating in the axial direction relative to the corresponding left base and / or right base, thereby avoiding the risk of cross-pinning.

[0014] The locking structure includes a socket formed in the left base and / or the right base, a locking column that can be inserted into the socket, and a recessed portion provided on the pin shaft. The locking column can be clearance-matched with the socket and the pin shaft in the left base and / or the right base, so that installation and removal are convenient. For example, during installation, the locking column can be directly placed in the socket, so that it can fall by its own weight and be locked between the left base and / or the right base and the pin shaft.

[0015] In addition, by providing an internal thread on the top of the locking column, the top of the locking column can be rotatably connected via an operating tool during disassembly, so that the locking column can be removed from the insertion hole by the operating tool.

[0016] Moreover, the chain track link assembly of the present invention also installs a rubber plug in the socket together with the locking column, which can prevent the locking column from falling out of the socket on the one hand, and can also seal the socket to prevent foreign matter from falling into the socket and hindering the removal of the locking column on the other hand.

[0017] In another aspect, the present disclosure provides a track system, the track system comprising the track link assemblies as described above, the track link assemblies being connected in series with each other.

[0018] In yet another aspect, the present disclosure provides a construction machine, the construction machine comprising the track link assembly or the crawler system as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The features and advantages of the present disclosure will be clearly understood through the detailed description provided below with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and thus cannot be regarded as limiting the present invention, wherein:

[0020] Figure 1 A side view of a construction machine according to an exemplary embodiment of the present disclosure is shown;

[0021] Figure 2 An exploded view of a track link assembly according to an exemplary embodiment of the present disclosure is shown;

[0022] Figure 3 Show Figure 2 A top view of the track link assembly is shown;

[0023] Figure 4 Show Figure 3 A cross-sectional view of the track link assembly along line AA is shown;

[0024] Figure 5 Show Figure 3 The shown section is a cross-sectional view of the track link assembly along line BB.

[0025] Description of reference numerals:

[0026] 1. Left track section; 10. Left base; 11. First left hole; 12. Second left hole; 13. Left top surface; 2. Right track section; 20. Right base; 21. First right hole; 22. Second right hole; 23. Right top surface; 3. Pin shaft; 4. Locking structure; 41. Socket; 42. Locking column; 43. Recess; 44. Rubber plug; 5. First pin sleeve; 6. Second pin sleeve; 7. Left sealing ring; 8. Right sealing ring. DETAILED DESCRIPTION

[0027] Embodiments of the present disclosure are described below with reference to the accompanying drawings. In the following description, many specific details are set forth so that those skilled in the art can more fully understand and implement the present invention. However, it is obvious to those skilled in the art that the implementation of the present invention may not have some of these specific details. In addition, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, it is contemplated that any combination of the features and elements described below may be used to implement the present invention, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments and advantages are for illustrative purposes only and should not be regarded as elements or limitations of the claims unless explicitly stated in the claims.

[0028] In the following, terms such as "first", "second", etc. are used to describe the elements of the present application. These terms are only used to distinguish the various elements, and are not used to limit the nature, order or number of these elements. The terms "including" and "having" are used to express an open-ended inclusive meaning, and mean that there may be additional elements / components in addition to the listed elements / components.

[0029] See also Figure 1 , which shows a construction machine 100 including a track system. The construction machine 100 is shown as a tracked tractor, but it can also be a tracked excavator, loader or any of a variety of other machines. The construction machine 100 can include a track system 110, which can be one of two separate track systems arranged on opposite sides of a frame 120 of the construction machine 100 in a conventional manner. The track system 110 can include a track roller frame 130 connected to the frame 120 and a plurality of rotatable track engagement elements 140, 150 and 160. In one embodiment, the track engagement elements 140 and 150 can be rotatable idler wheels that are passively rotated during operation of the track system 110, and the track engagement element 160 can be a drive wheel for driving the track system 110, which can have teeth for engaging and, in particular, inserting between the track links of the track system. The track system 110 can also include a plurality of track rollers 170 mounted to the track roller frame 130. Track system 110 may further include a track 180 extending around track engagement elements 140, 150, and 160 and track rollers 170. Track 180 may include a plurality of pairs of track links and a plurality of track shoes 181 connected to the pairs of track links. Track rollers 170 may abut against left track link 1 and / or right track link 2 adjacent thereto.

[0030] Figures 2 to 4 FIG. 2 shows a chain track link assembly according to an embodiment of the present disclosure. The chain track link assembly according to this embodiment mainly includes a left chain track link 1, a right chain track link 2, a pin shaft 3, a locking structure 4, a first pin sleeve 5, a second pin sleeve 6, a left sealing ring 7 and a right sealing ring 8, as shown in FIG. Figure 2 and Figure 3 shown.

[0031] The left chain link 1 and the right chain link 2 are constructed in a mirror-symmetrical manner and arranged at intervals with the plane perpendicular to the central axis of the pin 4 as the symmetry plane. The left chain link 1 includes a left base 10, a first left hole 11 and a second left hole 12. The left base 10 has Figure 2 and Figure 3The first end at the front side and the second end at the rear side are shown, the first left hole 11 is formed at the first end of the left base 10, and the second left hole 12 is formed at the second end of the left base 20. The right chain track segment 2 includes the right base 20, the first right hole 21 and the second right hole 22. The right base 20 also has Figure 2 and Figure 3 The first end 21 is formed at the first end of the right base body 20 , and the second end 22 is formed at the second end of the right base body 20 .

[0032] The two ends of the pin shaft 3 are respectively installed in the first left hole 11 and the first right hole 21 in an interference fit manner, so as to connect the left track link 1 and the right track link 2 at the first end of each track link. The first pin sleeve 5 surrounds the outer circumference of the pin shaft 3 and extends between the first left hole 11 and the first right hole 21. The two ends of the second pin sleeve 6 are respectively installed in the second left hole 12 and the second right hole 22 in an interference fit manner, so as to connect the left track link 1 and the right track link 2 at the second end of each track link.

[0033] See also Figure 2 At the first left hole 11 of the left track link 1, a left sealing groove which is annular and coaxial with the first left hole 11 can be provided on the peripheral edge of the side facing the right track link 2, and a left sealing ring 7 made of silicone, plastic or other materials and having a "W"-shaped cross section can be placed in the left sealing groove. Thus, the left sealing ring 7 will abut against the end surface of the left base 10 and the first pin sleeve 5 on both sides, and can prevent the loss of the lubricating medium that may exist between the first pin sleeve 5 and the pin shaft 3. Similarly, a right sealing ring 8 can be provided at the first right hole 21 of the right track link 2. The right sealing ring 8 can have a similar structure and function to the left sealing ring 7, which will not be described here.

[0034] As is generally known, the structures of the left and right track links 1, 2 can be designed so that the distance between their first ends (i.e., the distance between the first left hole 11 and the first right hole 21) is greater than the distance between their second ends (i.e., the distance between the second left hole 12 and the second right hole 22). In this way, the track link assembly can be connected to another track link assembly having the same structure via another pin shaft that passes through the second left hole 12 and the second right hole 22 and has the same structure as the pin shaft 3 (the pin shaft will extend from both sides of the second ends of the left and right track links 1, 2).

[0035] The locking structure 4 is disposed at a position where the pin shaft 3 contacts the left base body 10 and / or the right base body 20 and is designed to be detachable. The locking structure 4 is constructed and arranged to prevent the pin shaft 3 from translating (i.e., axially moving) in the first left hole 11 and / or the first right hole 21 relative to the left base body 10 and / or the right base body 20 along the axis direction of the pin shaft 3, thereby preventing the end of the pin shaft 3 from coming out of the first left hole 11 and / or the first right hole 21.

[0036] Here, it should be noted that the locking structure 4 can be provided only on the left track link 1 or only on the right track link 2, or can be provided on both the left track link 1 and the right track link 2. The following will take the case where the locking structure 4 is provided on the left track link 1 as an example for description.

[0037] According to an exemplary embodiment of the locking structure 4, Figures 2 to 5 As shown, the locking structure 4 can be arranged between the left base body 10 and the pin shaft 3, and can include an insertion hole 41, a locking column 42 and a recess 43 that can cooperate or engage with each other.

[0038] The insertion hole 41 extends through the left base body 10 and passes into the corresponding first left hole 11, so that the locking column 42 can pass through the insertion hole 41 and engage with the portion of the pin 3 located in the first left hole 11. In practice, the insertion hole 41 can be formed, for example, by a single drilling operation, which can penetrate the left base body 10 above the first left hole 11 ( Figure 2 The left base body 10 extends from the base body portion of the left base body 10 (in the upward direction) into the first left hole 11, and after passing through the first left hole 11, continues to extend into the base body portion of the left base body 10 located below the first left hole 11, thereby forming a blind hole as a whole. Figure 5 It can be seen in.

[0039] In order to facilitate the left base 10 or the right base 20 to engage the track shoe 181 and the track roller 170, as shown in FIG. Figure 2-3 As shown, the left base 10 has a flat left top surface 13 and a left bottom surface (not shown), and the right base 20 has a flat right top surface 23 and a right bottom surface (not shown). In this case, the insertion hole 41 can be formed at the left top surface 13, that is, starting from the left top surface 13 and extending vertically into the left base 10 until it passes into the first left hole 11. When the track shoe 181 is engaged with the left top surface 13, it can cover at least a portion of the insertion hole 41 to block the locking column 42 in the insertion hole 41.

[0040] The recess 43 may be formed on the pin 3 in alignment with the insertion hole 41 and has a shape and size suitable for receiving the locking column 42. Figures 2 to 5, the recess 43 can be formed on the section of the pin 3 located in the first left hole 11, and can be close to the axial end of the pin 3. Advantageously, as shown in the figure, the recess 43 can be formed by a semicircular groove cut around the entire outer circumference of the pin 43. In this way, it is not only conducive to the formation of the recess 43 itself (it can be cut directly on the pin 3 by a ball head cutter), but also allows the locking column 41 to be engaged in the recess 43 by simply inserting and passing the locking column 42 through the insertion hole 41, avoiding the problem of excessive stress on the locking column 42 when the direction changes with the rotation of the driving wheel when connecting multiple chain track link assemblies together.

[0041] Preferably, the top end of the locking column 42 may have an internal thread for engaging an operating tool, so that the operating tool and the locking column 42 can be fastened together and the locking column 42 can be pulled out of the insertion hole 41 by means of the operating tool. Figure 4 and Figure 5 As can be seen, the size (particularly the length) of the locking post 42 can be configured so as not to be exposed from the insertion hole 41 after engaging the recess 43 .

[0042] Advantageously, the locking post 42 can be formed by a cylindrical pin of standard size. For example, an industrial standard threaded cylindrical pin made based on the GB120 standard can be used as the locking post 42. The top end of this standard threaded cylindrical pin has an internal thread for engaging an operating tool.

[0043] In some other embodiments, the socket 41 may have an internal thread, and the locking column 42 may have a matching external thread. In this way, the locking column 42 can be inserted into the socket 41 by screwing and engaged with the recess 43 on the pin 3. In this case, the top of the locking column 42 may be provided with a "cross" or "s" shaped recess suitable for engaging a screwing tool.

[0044] Further, refer to Figures 2 to 5 The locking structure 4 may further include a rubber plug 44 for sealing the locking column 42 in the insertion hole 41. Due to its elasticity, the rubber plug 44 can elastically resist the left base body 10 in the insertion hole 41, thereby preventing the locking column 42 from coming out of the recess 43 or even from the insertion hole 41 on the one hand, and sealing the insertion hole 41 on the other hand to prevent impurities such as mud and sand from entering the insertion hole 41 and hindering the removal of the locking column 42. It is understood that the rubber plug 44 can be made of commonly used elastic materials such as rubber and silicone.

[0045] The present disclosure also provides a track system and engineering machinery including the track link assembly. The track system may include a plurality of track link assemblies as described above. The track link assemblies may be connected in series with each other, wherein the second pin sleeve of the previous track link assembly may serve as the first pin sleeve of the next track link assembly, thereby connecting two adjacent track link assemblies together.

[0046] Industrial Applicability

[0047] The track link assembly according to the present disclosure is applicable to crawler-type engineering machinery, and is particularly applicable to crawler-type tractors, crawler-type excavators, crawler-type loaders or other engineering machinery that require crawler systems for support and walking.

[0048] When assembling the crawler 180, the first track link assembly can be assembled first. That is, the second pin sleeve 6 is passed through the second left hole 12 of the left base 10 and the second right hole 22 of the right base 20 from one side by a press machine. The left track link 1 and the right track link 2 are respectively connected to the second pin sleeve 6 by an interference fit installation method. Thus, the assembly of the first track link assembly is completed.

[0049] Then, the second track link is directly assembled on the basis of the first track link assembly. That is, the first left hole 11 of the left track link 1 and the first right hole 21 of the right track link 2 of the second track link assembly are aligned with the second left hole 12 and the second right hole 22 of the left track link 1 and the right track link 2 of the first track link assembly respectively, and the pin 3 of the second track link assembly is aligned with the second left hole 12 and the second right hole 22 of the second track link assembly, and the left track link 1 and the right track link 2 of the second track link assembly are pressed onto the pin 3 by a press machine, and the left track link 1 and the right track link 2 are pressed onto the second pin sleeve 6 of the second track link assembly. Thereafter, the locking column 42 can be placed in the insertion hole 41 on the left track link 1 of each track link assembly and engaged with the recess 43 on the pin 3. This process can be simply achieved by allowing the locking column 42 to naturally fall onto the pin 3 in the insertion hole 41 by gravity. Next, a rubber plug 44 is placed in the insertion hole 41 to seal the locking column 42. In this way, a plurality of track link assemblies are connected to form a long chain-like crawler belt 180.

[0050] In the prior art, the track link assembly connects two adjacent track links by means of an interference fit through a pin shaft passing through a pin sleeve. When used on large or super-large engineering machinery, the pin shaft often vibrates and comes out of the track link under harsh working conditions or heavy loads. Compared with the prior art, the track link assembly disclosed in the present invention provides a locking structure 4 on at least one of the two track links, such as the left track link 1, so as to prevent the pin shaft 3 from translating relative to these track links along the axial direction thereof. This can avoid the risk of cross-pinning of the track 180.

[0051] Advantageously, the locking column 42 is matched with the insertion hole 41 in the left base 10 and the recess 43 on the pin 3 with a small clearance, so as to facilitate installation and removal. For example, during installation, the locking column 42 can be directly placed in the insertion hole 41, so that it can fall into the recess 43 or groove on the pin 3 by its own weight, thereby preventing the pin 3 from moving axially relative to the base of the chain track link like a bolt.

[0052] For those skilled in the art, various modifications and variations may be made to the embodiments disclosed above without departing from the scope or spirit of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from the practice of the utility model disclosed in this specification. This specification and the examples disclosed therein should be considered to be illustrative only, and the true scope of the utility model is specified by the appended claims and their equivalents.

Claims

1. A chain track segment assembly, the chain track segment assembly comprising: A left chain track segment (1), the left chain track segment (1) comprising a left base body (10) and a first left hole (11) formed at a first end of the left base body (10); a right track link (2), the right track link (2) being constructed in a mirror-symmetrical manner with the left track link (1) and being arranged spaced apart from the left track link (1), the right track link (2) comprising a right base body (20) and a first right hole (21) formed at a first end of the right base body (20); and A pin shaft (3), the pin shaft (3) being installed in the first left hole (11) and the first right hole (21) in an interference fit manner; It is characterized in that a detachable locking structure (4) is provided at a position where the pin shaft (3) contacts the left base body (10) and / or the right base body (20), and the locking structure (4) is configured to be inserted into the left base body (10) and / or the right base body (20) so as to prevent the pin shaft (3) installed in the first left hole (11) and / or the first right hole (21) from moving axially in the corresponding hole.

2. The track link assembly according to claim 1, characterized in that: The locking structure (4) comprises an insertion hole (41) passing through the left base body (10) and / or the right base body (20) and leading into the corresponding first left hole (11) and / or the first right hole (21), a locking column (42) capable of being inserted into the insertion hole (41) and engaging the pin shaft (3), and a recess (43) arranged on the pin shaft (3) for receiving the locking column (42).

3. The track link assembly according to claim 2, characterized in that: The recess (43) is formed by a semicircular groove cut around the entire periphery of the pin (3).

4. The track link assembly according to claim 2 or 3, characterized in that: The top end of the locking column (42) is provided with an internal thread for engaging an operating tool.

5. The track link assembly according to claim 2 or 3, characterized in that: The insertion hole (41) has an internal thread, and the locking column (42) has a matching external thread.

6. The track link assembly according to claim 2 or 3, characterized in that: The locking post (42) is formed by a cylindrical pin of standard size.

7. The track link assembly according to claim 2 or 3, characterized in that: The locking structure (4) also includes a rubber plug (44), which is inserted into the insertion hole (41) to seal the locking column (42).

8. The track link assembly according to claim 2 or 3, characterized in that: The left base body (10) has a flat left top surface (13), the right base body (20) has a flat right top surface (23), and the insertion hole (41) is formed on the left top surface (13) and / or the right top surface (23).

9. A crawler track system comprising a plurality of track link assemblies according to any one of claims 1 to 8, wherein the track link assemblies are connected in series with each other. 10 . An engineering machine, comprising the track link assembly according to claim 1 or the crawler system according to claim 9 .

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