CN215706754U - Track roller assembly - Google Patents

Abstract

The utility model relates to a track thrust wheel assembly, which comprises a wheel body, a bearing, a cap body, a wheel shaft, a rotary oil seal, an end cover and an oil body. The wheel body is provided with a thread, the bearing is arranged on the wheel body, the cap body is connected with the bearing, the wheel shaft penetrates through the bearing and the cap body, one side of the rotary oil seal is connected with the wheel body, the other side of the rotary oil seal is rotatably abutted against the cap body, the end cover is connected with the wheel shaft, and the oil body is limited in an accommodating space formed by the wheel body, the wheel shaft, the cap body and the rotary oil seal. Therefore, the wheel shaft is tightly attached to the cap body, and the rotary oil seal is connected with the cap body and the wheel body, so that the oil body can be prevented from overflowing, and the oil leakage probability is greatly reduced. In addition, the oil body can be always maintained in the accommodating space under the influence of gravity, so that the bearing can continuously operate to prevent the track roller assembly from losing efficacy.

Description

Track roller assembly

Technical Field

The utility model relates to a track roller assembly, in particular to a track roller assembly.

Background

Track roller assemblies (e.g., those of excavators or tractors) are often subjected to extreme operating conditions and are subject to significant stress and wear. Track roller assemblies are more susceptible to damage when operating in extreme conditions in mountainous and rocky terrain. As a result, track roller assemblies have problems with high maintenance costs, wear resulting in short life, and other structural issues. The solution to these problems is the need to constantly keep the track roller assemblies well lubricated. However, when the roller assembly is operated in a difficult area, the leakage of the lubricating oil from the inner area to the outer area of the roller assembly is often caused, and the maintenance cost for repairing the leakage or replacing the entire roller assembly is greatly increased. While other structural problems include high part count of the build assembly, complex manufacturing processes, and handling of oil lubricants during build.

Track roller assemblies are known which utilize a pair of laterally spaced end caps connected to an axle and adapted to support the axle within a blind bore defined by a cylindrical inner wall and an end wall. A bearing assembly is mounted in this blind bore and is interposed between the end cap and the axle and is formed of a sleeve-type cylindrical bushing fixedly supported by the inner wall and a disc-type thrust washer fixed to the end wall. Vertically extending channels in the end wall accommodate oil body lubricants such as: the oil mass may be directed to the bogie wheel assembly through an orifice. While known track roller assemblies utilize bushings and thrust washers, they fail to address the long-standing problem of oil leakage, i.e., the susceptibility of oil to leakage under extreme operating conditions. Therefore, the prior art lacks a track roller assembly that can prevent oil leakage and does not fail, and the related manufacturers seek solutions.

SUMMERY OF THE UTILITY MODEL

Therefore, an object of the present invention is to provide a track roller assembly, wherein the cap is tightly engaged with the wheel shaft, and the rotating oil seal connects the wheel body and the cap, so as to prevent the oil from overflowing, thereby greatly reducing the probability of oil leakage and preventing the track roller assembly from failing.

One embodiment of the present invention is a track roller assembly, which includes a roller body, a bearing, a cap, a roller shaft, a rotary oil seal, an end cap, and an oil body. The wheel body is provided with a thread, the bearing is arranged on the wheel body, the cap body is connected with the bearing, and the wheel shaft penetrates through the bearing and the cap body. One side of the rotary oil seal is connected with the wheel body, and the other side of the rotary oil seal is rotationally abutted to the cap body. The end cover is connected with the wheel shaft, and the oil body is limited in a containing space formed by the wheel body, the wheel shaft, the cap body and the rotary oil seal.

Therefore, the track thrust wheel assembly is combined with the wheel body and the cap body through the rotary oil seal, and the cap body is tightly attached to the wheel shaft, so that the oil body can be prevented from overflowing, the probability of oil leakage is greatly reduced, and the track thrust wheel assembly is not invalid.

Other examples according to the foregoing embodiments are as follows: the track roller assembly may include an O-ring disposed between the cap and the axle, the O-ring being a compliant O-ring. Furthermore, the outer wall of the wheel shaft is provided with a ring groove, and an O-shaped ring is arranged between the ring groove and the cap body.

Other examples according to the foregoing embodiments are as follows: the track roller assembly may include an oil seal guard ring disposed on the roller body and connected to the rotary oil seal.

Other examples according to the foregoing embodiments are as follows: the track roller assembly may include a limiting member disposed between the cap body and the oil seal guard ring, and the limiting member limits the cap body. In addition, the outer wall of the cap body can be annularly provided with a limiting groove, and the limiting part is arranged between the limiting groove and the oil seal protective ring. In addition, the limiting member may include a first limiting section and a second limiting section, the first limiting section is connected to the second limiting section, and the first limiting section is embedded in the limiting groove. The cap body comprises at least one fixing groove, and the second limiting section is embedded in the at least one fixing groove.

Other examples according to the foregoing embodiments are as follows: the outer wall of the wheel shaft is provided with a limiting groove, and the second limiting section of the limiting part is arranged in the limiting groove.

Other examples according to the foregoing embodiments are as follows: the track roller assembly may include a latch that removably couples the end cap to the axle. Furthermore, the rotary oil seal may include at least one oil blocking portion and a dust-proof portion, wherein the at least one oil blocking portion is rotatably abutted to the cap body and is close to the oil body. The dust-proof part is rotationally abutted against the cap body and is far away from the oil body.

Another embodiment of the present invention is a track roller assembly, which includes two rollers, two bearings, two caps, a roller shaft, two rotary oil seals, two end caps, and an oil body. The two wheels are connected with each other, and each wheel is provided with a thread. The two bearings are respectively arranged on the two wheel bodies, and the two cap bodies are respectively connected with the two bearings. The wheel shaft is arranged through the two bearings and the two cap bodies. One side of each rotary oil seal is connected with each wheel body, and the other side of each rotary oil seal is rotationally abutted to each cap body. The two end covers are respectively connected with two opposite ends of the wheel shaft, and the oil body is limited in a containing space formed by the two wheel bodies, the two cap bodies, the wheel shaft and the two rotary oil seals.

Therefore, the track thrust wheel assembly disclosed by the utility model combines the two wheel shafts and the two cap bodies through the two rotary oil seals, the two cap bodies are tightly attached to the wheel shafts, and the whole assembly is realized through a symmetrical structure, so that the oil leakage probability can be greatly reduced, and the track thrust wheel assembly cannot fail.

Other examples according to the foregoing embodiments are as follows: the track roller assembly may include two O-rings, each O-ring disposed between each cap and the axle, each O-ring being a compliant O-ring. In addition, the outer wall of the wheel shaft is provided with two ring grooves which are oppositely arranged, and each O-shaped ring is arranged between each ring groove and each cap body.

Other examples according to the foregoing embodiments are as follows: the track roller assembly may include two oil seal guard rings, each of which is disposed on each of the roller bodies and connected to each of the rotary oil seals.

Other examples according to the foregoing embodiments are as follows: the track thrust wheel assembly may include two limiting members, each limiting member being disposed between each cap body and each oil seal protection ring, each limiting member limiting each cap body. Furthermore, the outer wall of each cap body is annularly provided with a limiting groove, and each limiting part is arranged between the limiting groove and each oil seal protective ring. In addition, each limiting part comprises a first limiting section and a second limiting section, the first limiting section is connected with the second limiting section, and the first limiting section is embedded in the limiting groove. Each cap body comprises at least one fixing groove, and the second limiting section is embedded in the at least one fixing groove.

Other examples according to the foregoing embodiments are as follows: the outer wall of the wheel shaft is provided with two limiting grooves which are oppositely arranged, and the second limiting section of each limiting part is arranged in each limiting groove.

Other examples according to the foregoing embodiments are as follows: the track roller assembly may include two pins, each pin detachably connecting each end cap to the axle. In addition, each rotary oil seal comprises at least one oil blocking part and a dust-proof part, wherein the at least one oil blocking part is rotatably abutted against each cap body and is close to the oil body, and the dust-proof part is rotatably abutted against each cap body and is far away from the oil body.

Drawings

The foregoing and other objects, features, and advantages of the utility model will be apparent from the following more particular description of the utility model, as illustrated in the accompanying drawings in which:

FIG. 1 is a schematic perspective view of a track roller assembly according to one embodiment of the present invention;

FIG. 2 is an exploded view of the track roller assembly of FIG. 1;

FIG. 3 is a cross-sectional schematic view illustrating the track roller assembly of FIG. 1;

FIG. 4 is a schematic drawing showing a partial cross-sectional view of the track roller assembly of FIG. 1;

FIG. 5 is a schematic view illustrating an axle of the track roller assembly of FIG. 1;

FIG. 6 is a schematic diagram illustrating the assembly of the axle, O-ring, and stop of the track roller assembly of FIG. 1; and

fig. 7 is a schematic diagram illustrating the cap and the stopper of the track roller assembly of fig. 1.

[ notation ] to show

100 track roller assembly

110, an accommodating space

200 wheel body

300 bearing

400, cap body

410 limiting groove

420, fixing groove

500 axle

510 ring groove

520, limit groove

600: rotary oil seal

610 oil retaining part

620 dust-proof part

700 end cap

800 oil body

900: O-ring

1000 oil seal protective ring

1100 position limiter

1102 first limit section

1104 second limit section

1200 pin

Detailed Description

Various embodiments of the present invention will now be described with reference to the accompanying drawings, in order that those skilled in the art may readily utilize and practice the utility model without undue interpretation and experimentation. However, the reader should understand that these implementation details are not intended to limit the utility model, i.e., they are not necessary in some embodiments of the utility model. In addition, for the sake of simplicity, some conventional structures and elements are shown in the drawings in a simple schematic manner; and repeated elements will likely be referred to using the same reference numerals.

In addition, when an element (or a mechanism or a module, etc.) is "connected," "disposed" or "coupled" to another element, it can be directly connected, disposed or coupled to the other element, or it can be indirectly connected, disposed or coupled to the other element, that is, there are other elements between the element and the other element. When an element is explicitly connected, directly disposed, or directly coupled to another element, it is intended that no other element is interposed between the element and the other element. The terms first, second, third, etc. are used merely to describe various elements or components, but the elements/components themselves are not limited, so that the first element/component can be also referred to as the second element/component. And the combination of elements/components/mechanisms/modules herein is not a commonly known, conventional or known combination in the art, and cannot be readily determined by one of ordinary skill in the art based on whether the elements/components/mechanisms/modules are known per se.

Referring to fig. 1 to 7, fig. 1 is a perspective view of a track roller assembly 100 according to an embodiment of the present invention; FIG. 2 illustrates an exploded view of the track roller assembly 100 of FIG. 1; FIG. 3 depicts a cross-sectional schematic view of the track roller assembly 100 of FIG. 1; FIG. 4 depicts a partially cut-away schematic view of the track roller assembly 100 of FIG. 1; FIG. 5 depicts a schematic view of an axle 500 of the track roller assembly 100 of FIG. 1; FIG. 6 illustrates an assembled schematic view of the axle 500, the O-ring 900, and the stop 1100 of the track roller assembly 100 of FIG. 1; fig. 7 is a schematic assembled view of the cap 400 and the stopper 1100 of the track roller assembly 100 of fig. 1. As shown, the track roller assembly 100 includes two rollers 200, two bearings 300, two caps 400, a roller axle 500, two rotary oil seals 600, two end caps 700, an oil body 800, two O-rings 900, two oil seal protection rings 1000, two stoppers 1100, and two pins 1200.

The two wheels 200 are connected to each other, wherein one wheel 200 includes a protrusion, the other wheel 200 includes a recess, the protrusion is embedded in the recess to tightly connect the two wheels 200, and each wheel 200 is hollow cylindrical and includes a thread (not shown). In addition, the outer side surface of each wheel body 200 is connected to the track, so that each wheel body 200 rotates. In other embodiments, the two wheels may be integrally formed, and the above description is not intended to be limiting.

The two bearings 300 are respectively disposed on the two wheel bodies 200, the two cap bodies 400 are respectively connected to the two bearings 300, and the wheel shaft 500 is disposed through the two bearings 300 and the two cap bodies 400. The two bearings 300 have the same structure, and each bearing 300 is pivotally connected between each wheel 200 and the wheel axle 500.

The outer wall of the axle 500 is provided with two ring grooves 510 and two limit grooves 520, and the two ring grooves 510 are disposed opposite to each other and used for accommodating the O-rings 900. The two limiting grooves 520 are disposed opposite to each other and are used for disposing the limiting members 1100.

One side (outer side) of each rotary oil seal 600 is connected to each wheel body 200, and the other side (inner side) of each rotary oil seal 600 is rotatably abutted to each cap body 400. Specifically, each rotary oil seal 600 includes an oil blocking portion 610 and a dust-proof portion 620, wherein the oil blocking portion 610 rotatably abuts against each cap 400 and is close to the oil body 800, and the oil blocking portion 610 can block the oil body 800 from leaving the accommodating space 110. The accommodating space 110 is a space formed by the two wheel bodies 200, the two cap bodies 400, the axle 500 and the two rotary oil seals 600. The dust-proof portion 620 is rotatably abutted against each cap 400 and away from the oil body 800, and the dust-proof portion 620 is inclined toward the X-axis direction (i.e., the axial direction of the axle 500) and can block outside dust from entering the accommodating space 110. The oil blocking portion 610 and the dust preventing portion 620 are made of soft material and are directly connected to the cap body 400. When the crawler moves, each wheel body 200, each cap body 400 and each rotary oil seal 600 are linked and rotate relative to the wheel shaft 500; in other words, when the crawler moves, the oil blocking portion 610 and the dust blocking portion 620 rotate relative to the cap body 400 to rub against the cap body 400. In other embodiments, the number of the oil blocking portions may be adjusted according to the requirement, and is not limited to the above.

The two end caps 700 are respectively connected to two opposite ends of the wheel axle 500, and the two end caps 700 are fixed to the track frame through screws, which are known in the art and therefore will not be described in detail.

The oil body 800 is limited in a containing space 110 formed by the two wheel bodies 200, the two cap bodies 400, the wheel shaft 500 and the two rotary oil seals 600. The oil body 800 is used to lubricate the bearings 300, thereby allowing the track roller assembly 100 to rotate normally.

Each O-ring 900 is disposed between each cap 400 and the axle 500, and each O-ring 900 is made of a plastic material. Each O-ring 900 is disposed between each ring groove 510 of the axle 500 and each cap 400. When each cap 400 is sleeved on the axle 500 and connected to each bearing 300, each O-ring 900 is pressed and deformed by each cap 400 and the ring groove 510 of the axle 500 to fill the gap between each cap 500 and the axle 500, so that each cap 400 is tightly attached to the axle 500.

Each oil seal protection ring 1000 is disposed on each wheel body 200 and connected to each rotary oil seal 600, each stopper 1100 is disposed between each cap body 400 and each oil seal protection ring 1000, and each stopper 1100 limits each cap body 400. Specifically, a limiting groove 410 is annularly disposed on the outer wall of each cap body 400, and each limiting member 1100 is disposed between the limiting groove 410 and each oil seal protection ring 1000 to prevent each cap body 400 from moving in the X-axis direction. Each of the position-limiting members 1100 includes a first position-limiting section 1102 and a second position-limiting section 1104, the first position-limiting section 1102 is connected to the second position-limiting section 1104, and the first position-limiting section 1102 is embedded in the position-limiting groove 410. In addition, each cap 400 includes at least one fixing groove 420, and the second position-limiting section 1104 is engaged with one of the fixing grooves 420 and disposed in each position-limiting groove 520 of the wheel axle 500. Therefore, the cap 400 can be tightly fixed on the wheel axle 500 without loosening through the clamping arrangement of the cap 400, the wheel axle 500 and the limiting member 1100.

Each latch 1200 removably connects each end cap 700 to the axle 500. Each end cap 700 and axle 500 includes an aperture, and each pin 1200 may be received through the apertures of each end cap 700 and axle 500 such that the axle 500 is secured to each end cap 700.

It should be noted that even if the oil level of the oil body 800 is lower than the oil blocking portion 610, the bearing 300 can be immersed in the oil body 800 to be lubricated, and when the oil level of the oil body 800 is lower than the oil blocking portion 610, the oil body 800 is always maintained at the lower half portion of the accommodating space 110 under the influence of gravity, so that the oil body 800 can be ensured not to overflow in the accommodating space 110 under the condition that the cap 400 is engaged with the wheel axle 500 and the oil seal 600 is rotated to be oil-tight. In other embodiments, the track roller assembly may include a roller body, a bearing, a cap, a wheel shaft, a rotary oil seal, an end cap, and an oil body, wherein the roller body is in a circular groove shape, and the number of the components is not limited to the above requirements. Therefore, the track roller assembly 100 of the present invention is tightly combined with the two roller bodies 200 and the two cap bodies 400 through the two rotary oil seals 600, and the whole assembly is realized through a symmetrical structure, such that the oil body 800 can be prevented from overflowing, and the oil leakage probability is greatly reduced. Furthermore, the oil body 800 is always maintained in the lower half of the accommodating space 110 under the influence of gravity, so that the bearing 300 can operate continuously and the crawler track roller assembly 100 does not fail.

As can be seen from the above embodiments, the present invention has the following advantages: firstly, the rotary oil seal is tightly combined with the wheel body and the cap body, and the whole assembly is realized through a symmetrical structure, so that the oil body can be prevented from overflowing, and the oil leakage probability is greatly reduced. Moreover, the oil body can be always maintained at the lower half part of the accommodating space under the influence of gravity, so that the bearing can continuously operate to prevent the track roller assembly from losing efficacy. Secondly, through the clamping arrangement of the wheel shaft, the cap body and the limiting part, the relative rotation of the wheel shaft and the cap body can be prevented, and the cap body is further prevented from moving towards the X-axis direction.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the utility model.

Claims (20)

1. A track roller assembly, comprising:

a wheel body having a thread;

a bearing arranged on the wheel body;

a cap body connected with the bearing;

a wheel shaft, which is arranged through the bearing and the cap body;

one side of the rotary oil seal is connected with the wheel body, and the other side of the rotary oil seal is rotatably abutted to the cap body;

an end cap connected to the axle; and

and the oil body is limited in an accommodating space formed by the wheel body, the wheel shaft, the cap body and the rotary oil seal.

2. The track roller assembly of claim 1, further comprising:

an O-ring disposed between the cap and the axle, the O-ring being a compliant O-ring.

3. The track roller assembly of claim 2, wherein the outer wall of the axle defines a groove, and the O-ring is disposed between the groove and the cap.

4. The track roller assembly of claim 1, further comprising:

and the oil seal protective ring is arranged on the wheel body and is connected with the rotary oil seal.

5. The track roller assembly of claim 4, further comprising:

and the limiting part is arranged between the cap body and the oil seal protective ring and limits the cap body.

6. The track roller assembly of claim 5, wherein the outer wall of the cap has a limiting groove, and the limiting member is disposed between the limiting groove and the oil seal guard ring.

7. The track roller assembly of claim 6,

the limiting piece comprises a first limiting section and a second limiting section, the first limiting section is connected with the second limiting section, and the first limiting section is embedded in the limiting groove; and

the cap body comprises at least one fixing groove, and the second limiting section is embedded in the at least one fixing groove.

8. The track roller assembly of claim 7, wherein the outer wall of the axle defines a retaining groove, and the second retaining segment of the retaining member is disposed in the retaining groove.

9. The track roller assembly of claim 1, further comprising:

a latch removably connecting the end cap to the axle.

10. The track roller assembly of claim 1, wherein the rotary oil seal comprises:

at least one oil blocking part which can be rotatablely abutted against the cap body and is close to the oil body; and

a dust-proof part which can be rotatablely connected with the cap body and is far away from the oil body.

11. A track roller assembly, comprising:

two wheel bodies connected with each other, each wheel body is provided with a thread;

two bearings respectively arranged on the two wheel bodies;

two cap bodies respectively connected with the two bearings;

a wheel shaft, which is arranged through the two bearings and the two cap bodies;

one side of each rotary oil seal is connected with each wheel body, and the other side of each rotary oil seal is rotatably abutted to each cap body;

two end covers respectively connected with two opposite ends of the wheel shaft; and

and the oil body is limited in a containing space formed by the two wheel bodies, the two cap bodies, the wheel shaft and the two rotary oil seals.

12. The track roller assembly of claim 11, further comprising:

two O-rings, each O-ring is disposed between each cap and the axle, and each O-ring is a plastic O-ring.

13. The track roller assembly of claim 12, wherein the outer wall of the axle has two annular grooves disposed opposite each other, and each of the O-rings is disposed between each of the annular grooves and each of the caps.

14. The track roller assembly of claim 11, further comprising:

and each oil seal protection ring is arranged on each wheel body and is connected with each rotary oil seal.

15. The track roller assembly of claim 14, further comprising:

and each limiting part is arranged between each cap body and each oil seal protection ring, and each limiting part limits each cap body.

16. The track roller assembly of claim 15, wherein each of the caps has a retaining groove formed around an outer wall thereof, and each of the retaining members is disposed between the retaining groove and each of the oil seal protection rings.

17. The track roller assembly of claim 16,

each limiting piece comprises a first limiting section and a second limiting section, the first limiting section is connected with the second limiting section, and the first limiting section is embedded in the limiting groove; and

each cap body comprises at least one fixing groove, and the second limiting section is embedded in the at least one fixing groove.

18. The track roller assembly of claim 17, wherein the outer wall of the axle is provided with two retaining grooves, the two retaining grooves are disposed opposite to each other, and the second retaining segment of each retaining member is disposed in each retaining groove.

19. The track roller assembly of claim 11, further comprising:

and each bolt is detachably connected with each end cover and the wheel shaft.

20. The track roller assembly of claim 11, wherein each of the rotary oil seals comprises:

at least one oil blocking part which can be rotatablely abutted against each cap body and is close to the oil body; and

a dustproof part which can be rotatablely connected with each cap body and is far away from the oil body.

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