CN115180035B

CN115180035B - Lubricating track caterpillar assembly, track and engineering machinery

Info

Publication number: CN115180035B
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: 2024-07-23
Anticipated expiration: 2042-07-29
Also published as: CN115180035A

Abstract

The invention provides a lubrication crawler caterpillar assembly, a crawler and engineering machinery, wherein the lubrication crawler caterpillar assembly comprises: the pin shaft is internally provided with a hollow cavity; the pin sleeve is sleeved outside the pin shaft and forms an accommodating gap; the caterpillar track links are arranged at two ends of the pin sleeve and are matched with the pin shaft and the pin sleeve to form a mounting cavity; the sealing mechanisms are provided with two groups and are 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, wherein the piston is movably nested in the hollow cavity and is divided into a containing cavity and a non-containing cavity, the containing cavity is communicated with the containing gap, one end of the telescopic piece stretches into the non-containing cavity and is connected with the piston, and the telescopic piece is configured to be capable of stretching when the pressure of the containing cavity is reduced. When the lubrication caterpillar track assembly is applied, if the lubrication medium in the accommodation gap is reduced, the telescopic piece can be extended and drive the piston to move, and the piston is utilized to compress the accommodation cavity, so that the lubrication medium in the accommodation cavity flows into the accommodation gap, and the lubrication effect is prevented from being reduced.

Description

Lubricating track caterpillar assembly, track and engineering machinery

Technical Field

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

Background

The crawler belt is an important component of a running gear in engineering machinery and is widely applied to equipment such as an excavator, a paver, a slag removing machine, a bulldozer and the like. The main function of the crawler belt is to change the driving torque and the rotation motion transmitted by the engine to the driving wheel into the driving force required by the running of the equipment and to support the whole equipment and the work of the load.

The common track mainly comprises a track pin shaft, pin sleeves, track links, track plates and the like, and the track pin connects the track links with the track plates to form a track link. The traditional track adopts a lubricating grease lubricating structure, and the lubricating grease is sealed between the pin shaft and the pin sleeve by using the sealing ring during assembly so as to play a lubricating role during the relative movement of the pin shaft and the pin sleeve. In recent years, in order to improve the service life of the crawler belt, on the basis of the traditional crawler belt, a crawler belt assembly, namely a lubrication crawler belt, is formed by changing the lubrication of a pin shaft and a pin bush from grease lubrication to thin oil lubrication and performing related improvement around the thin oil lubrication, and the lubrication crawler belt has greatly replaced the traditional crawler belt product and has wider application in crawler type engineering machinery.

However, in the practical use process, the lubricating crawler belt still has a plurality of problems due to the influence of the existing lubricating structure design, wherein the more outstanding is: in the long-term use process, the sealing performance of the structure is reduced, thin oil is easy to run off, and the lubrication 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 used for lubricating the caterpillar band in the prior art is continuously reduced in the long-term use process, so as to provide a lubricating caterpillar band assembly, a caterpillar band and engineering machinery.

In order to solve the problems, the invention provides a lubricating track caterpillar assembly which comprises a pin shaft, a pin sleeve, a caterpillar link, a sealing mechanism and a compression mechanism. Wherein, a hollow cavity is arranged in the pin shaft along the axial direction; the pin sleeve is sleeved outside the pin shaft and forms an accommodating gap; the caterpillar track links are arranged at two ends of the pin bush, and the caterpillar track links, the pin shaft and the pin bush are matched to form a mounting cavity; the sealing mechanism is provided with two groups which are 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 is arranged at one end or two ends of the hollow cavity, the compression mechanism comprises a piston and a telescopic piece, the piston is movably nested in the hollow cavity so as to divide the hollow cavity into a containing cavity and a non-containing cavity, the containing cavity is communicated with the containing gap, one end of the telescopic piece stretches into the non-containing cavity and is connected with the piston, and the telescopic piece is configured to be capable of stretching when the pressure of the containing cavity is reduced.

Optionally, the pin comprises: the pin shaft main body is internally provided with a hollow hole along the axial direction; the sealing sleeve is tightly 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 smaller than the surface roughness of the inner wall of the hollow hole.

Optionally, an intermediate 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 intermediate channel.

Optionally, the caterpillar link includes: the outer chain rail links are sleeved at two ends of the pin shaft; the inner chain track section is sleeved at two ends of the pin sleeve and positioned in the outer chain track section.

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

Optionally, the hollow cavity is disposed through the pin shaft; the compression mechanism further comprises a sealing plug, the sealing plug is used for sealing the hollow cavity, and the expansion 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 in threaded connection with the hollow cavity.

The invention also provides a track, which comprises a track plate and a lubricating track caterpillar assembly connected with the track plate, wherein the lubricating track caterpillar assembly is the lubricating track caterpillar assembly.

The invention also provides a construction machine comprising the crawler belt.

The invention has the following advantages:

1. The lubrication medium is injected into the accommodating cavity, so that the lubrication medium can flow into the accommodating gap, and further lubrication is performed by the lubrication medium when the pin shaft and the pin sleeve relatively move. Meanwhile, the containing gap can be well sealed through the sealing mechanism, and lubricating medium is effectively prevented from leaking from two ends of the pin sleeve. On this basis, in long-term use, even appear lubricating medium and hold the condition that runs off in the clearance in, can also drive the piston through the extension of extensible member and remove, utilize the piston compression to hold the chamber, make the lubricating medium who holds in the chamber flow into and hold the clearance, guarantee to hold and be full of lubricating medium all the time in the clearance, avoid lubrication effect decline.

2. By tightly nesting the sealing sleeve in the pin shaft main body and placing the piston in the sealing sleeve, the piston can be prevented from being in direct contact with the pin shaft main body, the pin shaft main body is 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 seal sleeve smaller than the surface roughness of the wall of the hollow hole, the sealability between the piston and the seal 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 that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 illustrates a schematic view of a lubricated track caterpillar assembly according to an embodiment of the present invention;

fig. 2 shows an exploded view of a portion of the structure of a lubricated caterpillar track assembly according to an embodiment of the present invention.

Reference numerals illustrate:

10. A pin shaft; 11. a pin main body; 111. a hollow hole; 112. an intermediate channel; 12. a sealing sleeve; 121. a hollow cavity; 1211. a receiving chamber; 1212. a non-receiving cavity; 20. a pin sleeve; 30. chain track section; 31. an outer chain rail joint; 32. an inner caterpillar track section; 40. a sealing mechanism; 41. a seal ring; 42. a thrust collar; 50. a compression mechanism; 51. a piston; 52. a telescoping member; 53. and (5) sealing the plug.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific 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 explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

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

This embodiment provides a lubricated track caterpillar assembly, as shown in fig. 1, which basically includes a pin shaft 10, a pin bushing 20, a caterpillar 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 links 30 are arranged at two ends of the pin bush 20, and the caterpillar track links 30, the pin shaft 10 and the pin bush 20 are matched to form a mounting cavity; the sealing mechanism 40 is provided with two groups which are 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 compression mechanism 50 is disposed at one or both ends of the hollow chamber 121, the compression mechanism 50 includes a piston 51 and a telescopic member 52, the piston 51 is movably nested in the hollow chamber 121 to partition the hollow chamber 121 into a receiving chamber 1211 and a non-receiving chamber 1212, the receiving chamber 1211 communicates with the receiving gap, one end of the telescopic member 52 extends into the non-receiving chamber 1212 and is connected to the piston 51, and the telescopic member 52 is configured to be capable of being elongated when the pressure of the receiving chamber 1211 is reduced.

In the above configuration, the lubricating medium such as the diluted oil is injected into the accommodation chamber 1211, so that the lubricating medium can flow into the accommodation gap, and lubrication can be performed by the lubricating medium when the pin 10 and the bush 20 relatively move. Meanwhile, the accommodation gap can be well sealed through the sealing mechanism 40, and lubricating medium is effectively prevented from leaking out from two ends of the pin bush 20. On the basis, even if the lubricating medium runs off from the containing gap in the long-term use process, the piston 51 can be driven to move through the extension of the telescopic piece 52, the piston 51 is utilized to compress the containing cavity 1211, so that the lubricating medium in the containing cavity 1211 flows into the containing gap, the containing gap is ensured to be always filled with the lubricating medium, and the lubricating effect is prevented from being reduced.

It should be noted that the non-accommodation chamber 1212 is not used to accommodate a lubrication medium. The total volume of the inner cavity of the sealing sleeve 12 is constant, and the volume of the receiving chamber 1211 is continuously reduced and the volume of the non-receiving chamber 1212 is continuously increased as the piston 51 moves toward the receiving chamber 1211.

In other embodiments, when grease is injected into the accommodation chamber 1211 to lubricate with the grease, the reduction of the lubrication effect, which is not affected by the kind of the lubrication medium, can be avoided.

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

As shown in fig. 1, the pin 10 includes a pin body 11 and a seal sleeve 12. In this embodiment, the pin sleeve 20 is arranged outside the pin body 11 in a clearance fit manner to form the accommodation clearance. Further, a hollow hole 111 is axially formed in the pin main body 11; the sealing sleeve 12 is closely nested in the hollow hole 111, and the hollow cavity 121 is formed in the sealing sleeve 12. According to this, by providing the seal sleeve 12, the piston 51 can be prevented from directly contacting the pin body 11, the pin body 11 can be more effectively protected, and the service life of the pin body 11 can be prolonged.

In this embodiment, the hollow cavity 121 is disposed through along the axial direction of the pin 10. Accordingly, the compression mechanisms 50 are provided in two groups, and the two groups of compression mechanisms 50 are provided at both ends of the hollow chamber 121 (both right and left ends of the hollow chamber 121) respectively. In this way, by means of the two groups of compression mechanisms 50, the pressure in the receiving chamber 1211 can be better balanced, and the lubrication medium can be fed into the receiving gap more quickly and more uniformly when the lubrication medium is reduced, further avoiding a reduction in the lubrication effect.

Further, as shown in fig. 1, an intermediate channel 112 is further provided in the pin 10 in a radial direction, and the receiving chamber 1211 communicates with the receiving gap through the intermediate channel 112. Through this intermediate channel 112, the lubricating medium in the receiving space 1211 can be introduced more uniformly into the receiving gap. Specifically, the vertical direction is one radial direction of the pin 10, which is illustrated as an example. At this time, the lubrication medium in the accommodation chamber 1211 may flow into the accommodation gap through both the upper middle passage 112 and the lower middle passage 112, and the distribution of the lubrication medium in the accommodation gap may be more uniform.

In practice, the number of the intermediate passages 112 may be increased on the basis of ensuring the strength of the pin 10, so that the lubrication medium can enter the receiving space through the plurality of intermediate passages 112 at the same time.

For the sealing sleeve 12, as shown in fig. 1, the sealing sleeve 12 is divided into two parts, i.e., a left half and a right half, for cooperation with the hollow cavity 121 and the intermediate passage 112. A 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 wall of the hollow cavity 121. With this arrangement, the inner wall of the seal sleeve 12 is smoother than if the piston 51 were directly fitted into the hollow cavity 121, so that the sealability between the piston 51 and the seal 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 nests more tightly within the hollow bore 111 and minimizes damage to the piston 51. In other embodiments, the piston 51 or the sealing sleeve 12 made of other materials can be used, which is not limited to the present embodiment.

As for the caterpillar link 30, as shown in fig. 1, it includes an outer caterpillar link 31 and an inner caterpillar link 32. Wherein, the outer chain track sections 31 are sleeved at the two ends of the pin shaft 10; the inner caterpillar links 32 are sleeved at two ends of the pin sleeve 20 and are positioned inside the outer caterpillar links 31. In this embodiment, the outer caterpillar link 31 is in interference fit with the pin shaft 10, and the inner caterpillar link 32 is in interference fit with the pin bush 20.

As for the sealing mechanism 40, as shown in fig. 1 and 2, it includes a seal ring 41 and a thrust ring 42. The seal ring 41 is in contact with the pin bush 20 and the outer rail joint 31 on both sides in the axial direction, and the installation cavity can be sealed by the seal ring 41, so that the lubricating medium is prevented from leaking out of the installation cavity. The thrust ring 42 is sleeved between the sealing ring 41 and the pin shaft 10, and the axial distance between the outer chain track joint 31 and the pin sleeve 20 can be limited through the thrust ring 42, so that the compression amount of the sealing ring 41 is better controlled, and the sealing effect is ensured.

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

On the one hand, the sealing plug 53 can restrict the telescopic piece 52, so that the piston 51 is driven to compress the accommodating cavity 1211 when the telescopic piece 52 stretches. On the other hand, the hollow cavity 121 can be blocked by the sealing plug 53, and even if a small amount of lubricating medium enters the hollow cavity 121 on the non-accommodation cavity 1212 side from the accommodation 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 is connected to the sealing plug 53. The working process of the spring is as follows: when the lubrication medium in the accommodation gap is reduced, the pressure in the accommodation chamber 1211 is reduced, and at this time, the spring is extended and drives the piston 51 to move, so that the piston 51 compresses the accommodation chamber 1211, and the lubrication medium in the accommodation chamber 1211 is fed into the accommodation gap, thereby ensuring continuous supply of the lubrication medium.

In other embodiments, the telescoping member 52 may also be configured as a hydraulic telescoping rod or a pneumatic telescoping rod to continuously compress the lubrication medium to ensure lubrication.

Preferably, the sealing plug 53 is provided as a sealing bolt which is screwed into the hollow cavity 121. Accordingly, the sealing is realized, the compression mechanism 50 is convenient to replace, and the maintainability of the compression mechanism 50 is improved.

In this embodiment, the hollow hole 111 includes a small diameter portion in the middle and large diameter portions at both ends with respect to the pin body 11, and the large diameter portion has a larger diameter than the small diameter portion. The seal sleeve 12 is nested in the small diameter portion, and the seal bolt is mounted in the large diameter portion.

The present embodiment also provides a track comprising a track shoe and a lubricated track rail assembly as described above.

Specifically, the lubricating track rail assembly is connected to the track shoe through the outer and inner track links 31 and 32, and the connection structure is a prior art, so that the description thereof will not be repeated here.

The embodiment also provides a construction machine comprising the track as described above.

Specifically, the engineering machine can be an excavator, a paver, a slag removing machine, a bulldozer or the like.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims

1. A lubricated track caterpillar 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 shafts (10) and the pin sleeve (20) are matched to form a mounting cavity;

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

-a compression mechanism (50) arranged at one or both ends of the hollow cavity (121), the compression mechanism (50) comprising a piston (51) and a telescopic member (52), the piston (51) being movably nested in the hollow cavity (121) to divide the hollow cavity (121) into a receiving cavity (1211) and a non-receiving cavity (1212), the receiving cavity (1211) being in communication with the receiving gap, one end of the telescopic member (52) extending into the non-receiving cavity (1212) and being connected to the piston (51), the telescopic member (52) being configured to be able to elongate when the pressure of the receiving cavity (1211) is reduced;

The pin (10) comprises:

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

A sealing sleeve (12) closely nested in the hollow hole (111), wherein the hollow cavity (121) is formed in the sealing sleeve (12);

The surface roughness of the inner wall of the hollow cavity (121) is smaller than the surface roughness of the inner wall of the hollow hole (111);

the hollow cavity (121) penetrates through the pin shaft (10);

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

the sealing plug (53) is arranged as a sealing bolt which is in threaded connection with the hollow cavity (121).

2. The lubricated caterpillar track assembly according to claim 1, wherein an intermediate channel (112) is radially provided through the pin body (11), the receiving cavity (1211) being in communication with the receiving gap through the intermediate channel (112).

3. The lubricated track caterpillar assembly according to claim 1 or 2, wherein the caterpillar links (30) comprise:

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

The inner caterpillar track links (32) are sleeved at two ends of the pin sleeve (20) and are positioned in the outer caterpillar track links (31).

4. A lubricated caterpillar track assembly according to claim 3, wherein the sealing mechanism (40) comprises:

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

the thrust ring (42) is sleeved between the sealing ring (41) and the pin shaft (10).

5. A track, comprising:

Track shoes;

A lubricated track rail assembly connected to the track shoe, the lubricated track rail assembly being as claimed in any one of claims 1 to 4.

6. A construction machine comprising the crawler belt according to claim 5.