CN115180035A

CN115180035A - Lubricated track caterpillar track of a tractor subassembly, track and engineering machine tool

Info

Publication number: CN115180035A
Application number: CN202210911002.0A
Authority: CN
Inventors: 陈尤旭; 封小鹏; 陈阳
Original assignee: Suote Transmission Equipment Co Ltd
Current assignee: Suote Transmission Equipment Co Ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-10-14
Anticipated expiration: 2042-07-29
Also published as: CN115180035B

Abstract

The invention provides a lubricated caterpillar track and caterpillar track assembly, a caterpillar track and engineering machinery, wherein the lubricated caterpillar track and caterpillar track assembly comprises: the pin shaft is internally provided with a hollow cavity; the pin bush is sleeved outside the pin shaft and forms an accommodating gap; the caterpillar track sections are arranged at two ends of the pin sleeve and matched with the pin shaft and the pin sleeve to form an installation cavity; two groups of sealing mechanisms are arranged and respectively and correspondingly arranged in the mounting cavities at the two ends of the pin sleeve so as to seal the accommodating gap; the compression mechanism comprises a piston and a telescopic piece, the piston is movably nested in the hollow cavity and divides the hollow cavity into an accommodating cavity and a non-accommodating cavity, the accommodating cavity is communicated with the accommodating gap, one end of the telescopic piece extends into the non-accommodating cavity and is connected with the piston, and the telescopic piece is configured to be capable of extending when the pressure of the accommodating cavity is reduced. When using this lubricated track caterpillar track of a tractor subassembly, if the lubricated medium in the accommodation clearance reduces, the extensible and drive piston of extensible piece removes, utilizes the piston compression to hold the chamber, makes the lubricated medium that holds the intracavity flow in and holds the clearance, avoids lubricated effect to descend.

Description

Lubricated track caterpillar track of a tractor subassembly, track and engineering machine tool

Technical Field

The invention relates to the technical field of crawler lubrication, in particular to a lubricated crawler caterpillar track assembly, a crawler and engineering machinery.

Background

The crawler belt is an important component of a walking device in engineering machinery and is widely applied to equipment such as an excavator, a paver, a slag raking machine, a bulldozer and the like. The main function of the crawler belt is to convert the driving torque and the rotary motion transmitted from the engine to the driving wheel into the driving force required by the equipment to walk, and to support the whole equipment and the load to work.

The common track mainly comprises a track pin roll, a pin bush, track links, a track shoe and the like, wherein the track pin connects the track links and the track shoe to form a track link. Traditional track adopts lubricating grease lubrication structure, utilizes the sealing washer to seal lubricating grease between round pin axle and pin bush during the assembly to play the lubrication action when round pin axle and pin bush relative motion. In recent years, in order to prolong the service life of a track, on the basis of the traditional track, a track assembly, namely a lubricated track, which is formed by changing the lubrication of a pin shaft and a pin bush from grease lubrication into thin oil lubrication and performing related improvement around the thin oil lubrication, appears.

However, in the actual use process, under the influence of the existing lubricating structure design, the lubricating track still has many problems, of which the following are more prominent: in the long-term use process, the structure sealing performance can be reduced, and the thin oil is easy to lose, so that the lubricating effect is continuously reduced.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the lubricating effect of a lubricating structure for lubricating a track in the prior art is continuously reduced in the long-term use process, so that the lubricating track caterpillar component, the track and the engineering machinery are provided.

In order to solve the above problems, the present invention provides a lubricated track caterpillar assembly, which comprises a pin shaft, a pin bush, a caterpillar link, a sealing mechanism and a compression mechanism. Wherein, a hollow cavity is axially arranged inside the pin shaft; the pin sleeve is sleeved outside the pin shaft and forms an accommodating gap; caterpillar track sections are arranged at two ends of the pin sleeve, and the caterpillar track sections, the pin shaft and the pin sleeve are matched to form an installation cavity; the two groups of sealing mechanisms are respectively and correspondingly arranged in the mounting cavities at the two ends of the pin sleeve so as to seal the accommodating gap; compression mechanism sets up the one end or both ends at well cavity, and compression mechanism includes piston and extensible member, and the movably nestification of piston is in well cavity to separate for holding the chamber and not holding the chamber with well cavity, hold chamber and holding clearance intercommunication, the one end of extensible member stretches into the non chamber of holding and is connected with the piston, and the extensible member is configured to extend when the pressure that holds the chamber reduces.

Optionally, the pin includes: the pin shaft comprises a pin shaft main body, wherein a hollow hole is formed in the pin shaft main body along the axial direction; and the sealing sleeve is closely nested in the hollow hole, and a hollow cavity is formed in the sealing sleeve.

Optionally, the surface roughness of the inner wall of the hollow cavity is less than the surface roughness of the inner wall of the hollow bore.

Optionally, a middle channel is radially arranged in the pin shaft body in a penetrating manner, and the accommodating cavity is communicated with the accommodating gap through the middle channel.

Optionally, the track link comprises: the outer chain track section is sleeved at two ends of the pin shaft; and the inner chain track joint is sleeved at two ends of the pin sleeve and is positioned in the outer chain track joint.

Optionally, the sealing mechanism comprises: the two axial sides of the sealing ring are respectively abutted with the pin bush and the outer chain track joint; the thrust ring is sleeved between the sealing ring and the pin shaft.

Optionally, the hollow cavity is arranged through the pin shaft; the compression mechanism further comprises a sealing plug, the sealing plug is used for plugging the hollow cavity, and the telescopic piece is arranged between the sealing plug and the piston.

Optionally, the sealing plug is provided as a sealing bolt, and the sealing bolt is screwed in the hollow cavity.

The present invention also provides a track comprising a track plate and a lubricated track-link assembly connected to the track plate, the lubricated track-link assembly being as described above.

The invention also provides a construction machine which comprises the crawler belt.

The invention has the following advantages:

1. and lubricating media are injected into the accommodating cavity, so that the lubricating media can flow into the accommodating gap, and further the pin shaft and the pin bush are lubricated by the lubricating media when moving relatively. Simultaneously, can carry out good sealing to holding the clearance through sealing mechanism, effectively avoid lubricated medium to spill from the both ends of round pin cover. On this basis, in long-term use, even appear the condition that lubricating medium runs off in following the holding clearance, extension through the extensible member also can drive the piston and remove, utilizes the piston compression to hold the chamber, makes the lubricating medium who holds the intracavity flow in and holds the clearance, guarantees to be full of lubricating medium in the holding clearance all the time, avoids lubricated effect to descend.

2. The sealing sleeve is tightly nested in the pin shaft main body, and the piston is arranged in the sealing sleeve, so that the piston can be prevented from being in direct contact with the pin shaft main body, the pin shaft main body is more effectively protected, and the service life of the pin shaft main body is prolonged.

3. By making the surface roughness of the inner wall of the sealing sleeve smaller than the surface roughness of the wall of the hollow hole, the sealing property between the piston and the sealing sleeve can be improved. In the long-term use process, the damage to the piston can be effectively reduced, the service life of the piston is prolonged, and the whole structure is more reliable.

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 illustrates a schematic view of a lubricated track link assembly shown in an embodiment of the present invention;

fig. 2 illustrates an exploded view of a portion of the structure of a lubricated track link assembly, according to an embodiment of the present invention.

Description of reference numerals:

10. a pin shaft; 11. a pin shaft main body; 111. a hollow bore; 112. a middle channel; 12. a sealing sleeve; 121. a hollow cavity; 1211. an accommodating chamber; 1212. a non-containment chamber; 20. a pin bush; 30. a caterpillar link; 31. an outer link; 32. an inner link track section; 40. a sealing mechanism; 41. a seal ring; 42. a thrust ring; 50. a compression mechanism; 51. a piston; 52. a telescoping member; 53. and (6) sealing the plug.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to 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 according to specific situations by those of ordinary skill in the art.

Furthermore, 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.

The present embodiment provides a lubricated track link assembly, as shown in fig. 1, which basically includes a pin 10, a pin bushing 20, a track link 30, a sealing mechanism 40 and a compression mechanism 50.

Wherein, a hollow cavity 121 is axially arranged inside the pin shaft 10; the pin sleeve 20 is sleeved outside the pin shaft 10, and an accommodating gap is formed between the pin sleeve 20 and the pin shaft 10; the caterpillar track sections 30 are arranged at two ends of the pin sleeve 20, and the caterpillar track sections 30, the pin shaft 10 and the pin sleeve 20 are matched to form an installation cavity; two groups of sealing mechanisms 40 are arranged and respectively and correspondingly arranged in the mounting cavities at the two ends of the pin sleeve 20 so as to seal the accommodating gap; the compressing mechanism 50 is disposed at one end or both ends of the hollow cavity 121, the compressing mechanism 50 includes a piston 51 and a telescopic member 52, the piston 51 is movably nested in the hollow cavity 121 to divide the hollow cavity 121 into an accommodating chamber 1211 and a non-accommodating chamber 1212, the accommodating chamber 1211 is communicated with the accommodating gap, one end of the telescopic member 52 extends into the non-accommodating chamber 1212 and is connected with the piston 51, and the telescopic member 52 is configured to be capable of extending when the pressure of the accommodating chamber 1211 is reduced.

With the above arrangement, the lubricating medium such as the thin oil is injected into the accommodating cavity 1211, so that the lubricating medium can flow into the accommodating gap, and further, the pin shaft 10 and the pin bush 20 can be lubricated by the lubricating medium when moving relatively. Meanwhile, the accommodating gap can be well sealed through the sealing mechanism 40, and the lubricating medium is effectively prevented from leaking out of the two ends of the pin sleeve 20. On the basis, even if the lubricating medium runs off from the accommodating gap in the long-term use process, the piston 51 can be driven to move through the extension of the telescopic piece 52, the accommodating cavity 1211 is compressed by the piston 51, the lubricating medium in the accommodating cavity 1211 flows into the accommodating gap, the lubricating medium is ensured to be filled in the accommodating gap all the time, and the lubricating effect is prevented from being reduced.

It should be noted that, for the non-accommodating chamber 1212, it is not used for accommodating the lubricating medium. The total volume of the inner space of the sealing sleeve 12 is constant, and the volume of the receiving space 1211 decreases and the volume of the non-receiving space 1212 increases as the piston 51 moves toward the receiving space 1211.

In other embodiments, when grease is injected into the housing chamber 1211 to perform lubrication using grease, a decrease in the lubricating effect, which is not affected by the kind of the lubricating medium, can be prevented.

The arrangement of the lubricated track chain assembly is further described below.

As shown in fig. 1, the pin 10 includes a pin body 11 and a sealing sleeve 12. In this embodiment, the pin sleeve 20 is sleeved outside the pin shaft body 11 with a gap therebetween to form the above-mentioned accommodating gap. Further, a hollow hole 111 is axially formed in the pin shaft body 11; the sealing sleeve 12 is tightly nested in the hollow hole 111, and the hollow cavity 121 is formed in the sealing sleeve 12. Therefore, by arranging the sealing sleeve 12, the piston 51 can be prevented from directly contacting with the pin shaft main body 11, the pin shaft main body 11 can be more effectively protected, and the service life of the pin shaft main body 11 can be prolonged.

In this embodiment, the hollow cavity 121 is disposed to penetrate along the axial direction of the pin 10. Accordingly, two sets of the compression mechanisms 50 are provided, and the two sets of the compression mechanisms 50 are respectively and correspondingly disposed at two ends of the hollow cavity 121 (left and right ends of the hollow cavity 121). In this way, the pressure in the receiving space 1211 can be better equalized by the two sets of compression mechanisms 50, and the lubricating medium can be fed into the receiving space more quickly and uniformly when the lubricating medium is reduced, thereby further preventing the lubricating effect from being reduced.

Further, as shown in fig. 1, a middle channel 112 is radially arranged in the pin 10, and the receiving cavity 1211 is communicated with the receiving gap through the middle channel 112. The lubricating medium in the receiving space 1211 can be introduced more uniformly into the receiving space via the intermediate channel 112. Specifically, taking the figure as an example, the up-down direction is a radial direction of the pin 10. At this time, the lubricating medium in the accommodating cavity 1211 can simultaneously flow into the accommodating gap through the upper middle passage 112 and the lower middle passage 112, and the distribution of the lubricating medium in the accommodating gap is more uniform.

In actual installation, on the basis of ensuring the strength of the pin shaft 10, the plurality of intermediate channels 112 may be further provided, so that the lubricating medium may simultaneously enter the accommodating gap through the plurality of intermediate channels 112.

For the sealing sleeve 12, as shown in fig. 1, to fit the hollow cavity 121 and the middle passage 112, the sealing sleeve 12 is divided into two parts, i.e., a left half and a right half. A certain space is left between the two part sealing sleeve 12 so that the receiving chamber 1211 communicates with the intermediate passage 112 through the space.

Preferably, for the sealing sleeve 12, the surface roughness of the inner wall thereof is smaller than the surface roughness of the hole wall of the hollow cavity 121. With this arrangement, since the inner wall of the sealing sleeve 12 is smoother than when the piston 51 is directly fitted into the hollow chamber 121, the sealability between the piston 51 and the sealing sleeve 12 can be improved. More importantly, in the long-term use process, the damage to the piston 51 can be effectively reduced, the service life of the piston 51 is prolonged, and the whole structure is more reliable.

Alternatively, the piston 51 is made of rubber and the sealing sleeve 12 is made of polyurethane, so that the sealing sleeve 12 is nested more tightly in the hollow hole 111 and damage to the piston 51 is minimized. In other embodiments, the piston 51 or the sealing sleeve 12 made of other materials can be used, and the present embodiment is not limited thereto.

For the track link 30, as shown in fig. 1, it includes an outer track link 31 and an inner track link 32. Wherein, the outer chain track joint 31 is sleeved at the two ends of the pin shaft 10; the inner chain link 32 is sleeved on both ends of the pin sleeve 20 and is located inside the outer chain link 31. In this embodiment, the outer track link 31 is in interference fit with the pin shaft 10, and the inner track link 32 is in interference fit with the pin bushing 20.

As for the seal mechanism 40, as shown in fig. 1 and 2, it includes a seal ring 41 and a thrust ring 42. Both sides of the seal ring 41 in the axial direction are respectively abutted against the pin bush 20 and the outer link 31, and the seal ring 41 seals the installation cavity to prevent the lubricant from leaking from the installation cavity. The thrust collar 42 is sleeved between the seal ring 41 and the pin shaft 10, and the axial distance between the outer chain track section 31 and the pin sleeve 20 can be limited by the thrust collar 42, so that the compression amount of the seal ring 41 can be better controlled, and the sealing effect can be ensured.

For the compression mechanism 50, as shown in fig. 1, the compression mechanism 50 includes a sealing plug 53 in addition to the piston 51 and the telescoping member 52. In this embodiment, the telescoping member 52 is disposed between the sealing plug 53 and the piston 51.

On the one hand, the sealing plug 53 constrains the telescopic element 52, ensuring that the extension of the telescopic element 52 causes the piston 51 to compress the receiving chamber 1211. On the other hand, the sealing plug 53 can close the hollow cavity 121, and even if a small amount of lubricating medium enters the hollow cavity 121 on the non-accommodating cavity 1212 side from the accommodating cavity 1211, the lubricating medium can be effectively prevented from leaking out of the hollow cavity 121 by the sealing plug 53.

Preferably, the telescopic member 52 is provided as a spring, one end of which is connected to the piston 51 and the other end of which is connected to the sealing plug 53. The working process of the spring is as follows: when the lubricant in the receiving gap decreases, the pressure in the receiving cavity 1211 decreases, and at this time, the spring extends and drives the piston 51 to move, so that the piston 51 compresses the receiving cavity 1211, and the lubricant in the receiving cavity 1211 is replenished into the receiving gap, thereby ensuring the continuous supply of the lubricant.

In other embodiments, the telescopic member 52 may be configured as a hydraulic telescopic rod or a pneumatic telescopic rod to continuously compress the lubricating medium, so as to ensure the lubricating effect.

Preferably, the sealing plug 53 is configured as a sealing bolt that is threaded into the hollow cavity 121. Therefore, the sealing is realized, meanwhile, the compression mechanism 50 is convenient to replace, and the maintainability of the compression mechanism 50 is improved.

In this embodiment, for the pin body 11, the hollow hole 111 includes a small diameter portion in the middle and large diameter portions at both ends, and the diameter of the large diameter portion is larger than that of the small diameter portion. The sealing sleeve 12 is nested in the small diameter portion, and the sealing bolt is mounted on the large diameter portion.

The present embodiments also provide a track including a track shoe and a lubricated track link assembly as described above.

Specifically, the lubricated track link assembly is connected to the track shoe via an outer link 31 and an inner link 32, which are not described in detail herein since the connection structure is prior art.

The embodiment also provides a working machine which comprises the crawler belt.

Specifically, the engineering machinery can be an excavator, and can also be a paver, a slag raking machine or a bulldozer and 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. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the invention.

Claims

1. A lubricated track chain assembly, comprising:

the pin shaft (10) is internally provided with a hollow cavity (121) along the axial direction;

the pin sleeve (20) is sleeved outside the pin shaft (10) and forms an accommodating gap;

the caterpillar track sections (30) are arranged at two ends of the pin sleeve (20), and the caterpillar track sections (30), the pin shaft (10) and the pin sleeve (20) are matched to form an installation cavity;

two groups of sealing mechanisms (40) are arranged and respectively and correspondingly arranged in the mounting cavities at two ends of the pin sleeve (20) so as to seal the accommodating gap;

compressing mechanism (50), set up in the one end or both ends of well cavity (121), compressing mechanism (50) include piston (51) and extensible member (52), piston (51) movably nestification is in well cavity (121), in order with well cavity (121) separate for holding chamber (1211) and hold chamber (1212) with non-, hold chamber (1211) with hold the clearance intercommunication, the one end of extensible member (52) stretches into non-holds chamber (1212) and with piston (51) are connected, extensible member (52) are configured as can hold chamber (1211) when the pressure reduces the extension.

2. The lubricated track chain rail assembly according to claim 1, wherein the pin (10) comprises:

the hinge pin comprises a hinge pin body (11), wherein a hollow hole (111) is formed in the hinge pin body (11) along the axial direction;

and the sealing sleeve (12) is tightly nested in the hollow hole (111), and the hollow cavity (121) is formed in the sealing sleeve (12).

3. The lubricated track caterpillar assembly according to claim 2, wherein the surface roughness of the inner wall of the hollow cavity (121) is less than the surface roughness of the inner wall of the hollow hole (111).

4. Lubricated track link assembly according to claim 2, characterized in that a central channel (112) is radially provided through said pin body (11), said housing cavity (1211) communicating with said housing gap through said central channel (112).

5. Lubricated track link assembly according to any one of claims 1 to 4, characterized in that said track links (30) comprise:

the outer chain track sections (31) are sleeved at two ends of the pin shaft (10);

and the inner chain rail joint (32) is sleeved at two ends of the pin sleeve (20) and is positioned inside the outer chain rail joint (31).

6. The lubricated track chain rail assembly of claim 5, wherein the sealing mechanism (40) comprises:

the two axial sides of the sealing ring (41) are respectively abutted with the pin sleeve (20) and the outer chain track joint (31);

the thrust ring (42), the thrust ring (42) cover is established between sealing washer (41) and round pin axle (10).

7. Lubricated track chain assembly according to any one of claims 1 to 4, characterized in that the hollow cavity (121) is arranged through the pin (10);

the compression mechanism (50) further comprises a sealing plug (53), the sealing plug (53) is used for plugging the hollow cavity (121), and the telescopic piece (52) is arranged between the sealing plug (53) and the piston (51).

8. The lubricated track chain rail assembly according to claim 7, wherein the sealing plug (53) is provided as a sealing bolt which is threaded into the hollow cavity (121).

9. A track, comprising:

a track shoe;

a lubricated track link assembly connected to the track shoe, the lubricated track link assembly according to any one of claims 1 to 8.

10. A working machine comprising a track as claimed in claim 9.