CN216232651U

CN216232651U - Caterpillar track link assembly, caterpillar track structure and engineering machinery

Info

Publication number: CN216232651U
Application number: CN202122977806.4U
Authority: CN
Inventors: 陈阳; 封小鹏; 崔锦华
Original assignee: Suote Transmission Equipment Co Ltd
Current assignee: Suote Transmission Equipment Co Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-04-08
Anticipated expiration: 2031-11-30

Abstract

The utility model provides a caterpillar link assembly, a caterpillar structure and engineering machinery, wherein the caterpillar link assembly comprises: a connecting shaft; the connecting sleeve is rotatably sleeved outside the connecting shaft; one end of the connecting shaft is sequentially provided with an inner caterpillar track section and an outer caterpillar track section, and an annular sealing groove for accommodating a sealing element is arranged between the connecting sleeve and the outer caterpillar track section; the first sealing element is arranged on an oil path for injecting lubricating oil between the connecting shaft and the connecting sleeve, and the second sealing element is arranged on a path between the annular sealing groove and the outside. Above-mentioned structure has realized the double seal of adapter sleeve, outside caterpillar link and inboard caterpillar link, has improved sealed effect greatly. The technical scheme of the utility model overcomes the defect of poor sealing effect at the connecting part of the caterpillar track link of the caterpillar track in the prior art.

Description

Caterpillar track link assembly, caterpillar track structure and engineering machinery

Technical Field

The utility model relates to the technical field of engineering machinery, in particular to a caterpillar track section assembly, a caterpillar track structure and engineering machinery.

Background

The crawler is an important component of a traveling device of a hydraulic engineering machine, and is widely applied to operation machines such as a hydraulic excavator, a paver, a slag raking machine and a bulldozer. The main function of the track is to convert the driving torque and rotary motion transmitted by the engine to the driving wheels into the driving force required by the machine to walk, and to support the weight of the whole machine and the load.

The caterpillar track in the prior art comprises a left caterpillar track section, a right caterpillar track section, a pin shaft, a pin bush, a sealing ring and the like. The pin bush is sleeved outside the pin shaft, a certain gap is formed between the pin shaft and the pin bush, and lubricating grease is filled in the gap. The contact gap between the pin bush and the caterpillar track section is sealed by using a sealing ring, and the pin shaft and the pin bush are connected with the left caterpillar track section and the right caterpillar track section through interference assembly. In the above-mentioned structure, only set up a sealing washer between round pin cover and caterpillar link usually, and the inside and outside caterpillar link that is located one side has great clearance before, and foreign matter such as outside silt enters into sealing washer department from this clearance easily for the sealing washer is ageing fast, and sealed effect is poor.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the utility model is to overcome the defect of poor sealing effect at the track link joint of the track in the prior art, so as to provide a track link assembly, a track structure and engineering machinery.

In order to solve the above problems, the present invention provides a track link assembly comprising: a connecting shaft; the connecting sleeve is rotatably sleeved outside the connecting shaft; one end of the connecting shaft is sequentially provided with an inner caterpillar track section and an outer caterpillar track section, and an annular sealing groove for accommodating a sealing element is arranged between the connecting sleeve and the outer caterpillar track section; the first sealing element is arranged on an oil path for injecting lubricating oil between the connecting shaft and the connecting sleeve, and the second sealing element is arranged on a path between the annular sealing groove and the outside.

Optionally, the inner surface of the outboard track link is provided with a receiving recess and forms an annular seal groove, and the first seal and the second seal are disposed within the receiving recess.

Optionally, a mating protrusion is provided on an outer surface of the inboard caterpillar link, the mating protrusion extending into the receiving recess, and a second seal is provided between the inboard caterpillar link and the outboard caterpillar link.

Optionally, the first seal and/or the second seal is a belleville spring.

Optionally, the belleville spring is a V-shaped belleville spring.

Alternatively, the end portion on the side of the maximum diameter of the first seal member contacts an oil passage between the connecting shaft and the connecting sleeve into which lubricating oil is injected.

Optionally, an end of the second seal member on the side of the largest diameter contacts a passage of the annular seal groove with the outside.

Optionally, the outer caterpillar track section is in interference fit with the connecting shaft, and the inner caterpillar track section is in interference fit with the connecting sleeve.

The utility model also provides a track structure comprising the caterpillar track section assembly.

The utility model also provides engineering machinery comprising the crawler belt structure.

The utility model has the following advantages:

by utilizing the technical scheme of the utility model, a first sealing element is arranged on an oil way for injecting lubricating oil between the connecting shaft and the connecting sleeve, and a second sealing element is arranged on a path between the annular sealing groove and the outside. The second sealing member can block that outside mud enters into the track from the clearance between inboard caterpillar link and the outside caterpillar link, and first sealing member can seal the grease between connecting axle and the adapter sleeve. Above-mentioned structure has realized the double seal of adapter sleeve, outside caterpillar link and inboard caterpillar link, has improved sealed effect greatly. Therefore, the technical scheme of the utility model overcomes the defect of poor sealing effect at the caterpillar track section connecting part of the caterpillar track in the prior art.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 shows a schematic cross-sectional view of a track link assembly of the present invention; and

fig. 2 shows an enlarged schematic view at a in fig. 1.

Description of reference numerals:

10. a connecting shaft; 20. connecting sleeves; 30. an outboard caterpillar link; 31. an annular seal groove; 40. an inboard caterpillar link; 41. a mating protrusion; 50. a first seal member; 60. a second seal.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 and 2, the track link assembly of the present embodiment includes a connecting shaft 10, a connecting sleeve 20, an outer track link 30, an inner track link 40, a first seal 50, and a second seal 60. Wherein, the connecting sleeve 20 is rotatably sleeved outside the connecting shaft 10. The outer track link 30 is connected to an end of the connecting shaft 10 and located outside the connecting sleeve 20, and an annular seal groove 31 for accommodating a seal is provided between the outer track link 30 and the connecting sleeve 20. The inboard track link 40 is attached to the connection sleeve 20 and is located inboard of the outboard track link 30. A certain gap is formed between the connecting shaft 10 and the connecting sleeve 20, lubricating grease is filled in the gap, and the first sealing element 50 is arranged on an oil path between the connecting shaft 10 and the connecting sleeve 20 and filled with lubricating oil, so that the gap filled with the lubricating oil is sealed. The second seal 60 is provided on a path between the annular seal groove 31 and the outside, that is, a space between the outside link 30 and the inside link 40, and the second seal 60 can block outside sludge from entering the track from a gap between the inside link 40 and the outside link 30. The sealing element realizes double sealing, and greatly improves the sealing effect.

Further, a first seal 50 is disposed between the connection sleeve 20 and the outboard track link 30 and a second seal 60 is disposed between the inboard track link 40 and the outboard track link 30.

With the solution of the present embodiment, a first seal 50 is provided between the connection sleeve 20 and the outer track link 30, and a second seal 60 is provided between the inner track link 40 and the outer track link 30. The second sealing member 60 can block the outside sludge from entering the track from the gap between the inside track link 40 and the outside track link 30, and the first sealing member 50 can seal the grease between the connecting shaft 10 and the connecting sleeve 20.

It should be noted that, as will be understood by those skilled in the art, a plurality of parallel connecting shafts 10 are provided in the crawler, and each connecting shaft 10 is provided with a connecting sleeve 20. One end of one track link is connected to the connecting shaft 10 and the other end is connected to the connecting sleeve 20 on the adjacent connecting shaft, so that the outer track link 30 and the inner track link 40 are formed at both ends of one track link, respectively. Fig. 1 in this embodiment shows only a schematic cross-section at one of the connecting axles 10 in the idler sprocket assembly, but does not affect the understanding of the general structure of the idler sprocket assembly by those skilled in the art.

As shown in fig. 2, in the present embodiment, the inner surface of the outer link 30 is provided with a receiving recess, which forms the annular seal groove 31 described above, and the first seal 50 and the second seal 60 are disposed in the receiving recess. Specifically, the receiving recess is provided at a connecting hole where the outer track link 30 is connected to the connecting shaft 10, thereby forming a counter bore structure. The first seal 50 and the second seal 60 are both disposed within the receiving recess.

As can be seen from fig. 2, one end of the first sealing member 50 abuts against the bottom wall of the accommodating recess and the other end abuts against the end face of the connecting sleeve 20, and the first sealing member 50 seals grease between the connecting shaft 10 and the connecting sleeve 20.

As shown in fig. 1 and 2, in the present embodiment, the inner track link 40 is provided with a fitting protrusion 41 on an outer surface thereof, and the fitting protrusion 41 protrudes into the receiving recess and is fitted with the second seal member 60. Specifically, the fitting projection 41 is provided on the end face of the inner link 40, and forms a boss structure. One end of the second seal 60 abuts against the bottom wall of the accommodation recess, and the other end abuts against the engagement projection 41. The fitting projection 41 is structured such that the space of the annular seal groove 31 is increased in the radial direction, and the second seal 60 is disposed between the inside track link 40 and the outside track link 30.

Of course, in an embodiment not shown, the engagement protrusion 41 may not be provided on the inner link 40. As will be understood by those skilled in the art in conjunction with fig. 2, the radial dimension of the annular seal groove 31 is reduced, and therefore both the first seal 50 and the second seal 60 need to be disposed between the outboard track link 30 and the adapter sleeve 20, which is also a possible embodiment.

Further, the above-described structure of the receiving recess and the fitting protrusion 41 can enhance the coupling strength and rigidity between the outer side track link 30 and the inner side track link 40, thereby improving the overall durability of the track.

Preferably, the first and

second seals

50, 60 are belleville springs. The butterfly spring has the advantages of small occupied size and high strength. Meanwhile, the belleville spring has a certain deformation allowance, so that the axial load can be resisted. During assembly, the first seal 50 is compressed between the outboard track link 30 and the adapter sleeve 20 by a certain pressure, and the second seal 60 is compressed between the outboard track link 30 and the inboard track link 40 by a certain pressure.

Since the first seal 50 and the second seal 60 are belleville springs, the receiving recess and the fitting projection 41 are both annular structures.

Of course, other sealing structures, such as sealing rings, may be used for the first and

second sealing members

50, 60.

Preferably, the belleville spring is a V-shaped belleville spring. As can be seen in FIG. 2, the cross-sections of the first seal 50 and the second seal 60 are both "V" shaped.

As shown in fig. 2, in the solution of the present embodiment, the opening directions of the first seal 50 and the second seal 60 are opposite. Specifically, the opening of the first seal 50 faces downward, and the opening of the second seal 60 faces upward.

As shown in fig. 1, in the solution of the present embodiment, the outer track link 30 and the connecting shaft 10 are in interference fit, and the inner track link 40 and the connecting sleeve 20 are in interference fit, so that the adjacent track links can swing relatively.

As shown in fig. 1, in the solution of the present embodiment, the second seal 60 is located outside the first seal 50. Specifically, the first and

second seals

50 and 60 are belleville springs, the diameter of the second seal 60 is larger than that of the first seal 50, and the second seal 60 is circumferentially disposed outside the first seal 50.

The present embodiment also provides a track structure comprising the above-described track link assembly.

The embodiment also provides the engineering machinery which comprises the crawler belt structure. The work machine may be an excavator, a crane, or the like.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. A track link assembly, comprising:

a connecting shaft (10);

the connecting sleeve (20) is rotatably sleeved outside the connecting shaft (10);

one end of the connecting shaft (10) is sequentially provided with an inner caterpillar track section (40) and an outer caterpillar track section (30), and an annular sealing groove (31) for accommodating a sealing element is arranged between the connecting sleeve (20) and the outer caterpillar track section (30);

the sealing device comprises a first sealing element (50) and a second sealing element (60), wherein the first sealing element (50) is arranged on an oil path for injecting lubricating oil between the connecting shaft (10) and the connecting sleeve (20), and the second sealing element (60) is arranged on a path between the annular sealing groove (31) and the outside.

2. The track link assembly of claim 1 wherein an inner surface of the outboard track link (30) is provided with a receiving recess and forms the annular seal groove (31), the first seal (50) and the second seal (60) being disposed within the receiving recess.

3. The track link assembly according to claim 2, wherein the inner track link (40) is provided with a mating protrusion (41) on an outer surface thereof, the mating protrusion (41) protruding into the receiving recess, the second seal (60) being provided between the inner track link (40) and the outer track link (30).

4. The track link assembly according to any of claims 1 to 3, wherein the first seal (50) and/or the second seal (60) is a belleville spring.

5. The track link assembly of claim 4 wherein the belleville spring is a V-shaped belleville spring.

6. The track link assembly according to claim 5, wherein the end of the side of the largest diameter of the first seal member (50) contacts an oil path between the connecting shaft (10) and the connecting sleeve (20) into which lubricating oil is injected.

7. The track link assembly according to claim 5, wherein the end of the second seal (60) on the side of the largest diameter contacts the passage of the annular seal groove (31) with the outside.

8. A track link assembly according to any one of claims 1 to 3 wherein there is an interference fit between the outboard track link (30) and the connecting shaft (10) and an interference fit between the inboard track link (40) and the connecting sleeve (20).

9. A track structure, comprising a track link assembly as claimed in any one of claims 1 to 7.

10. A working machine, characterized by comprising a track structure according to claim 9.