A track roller for use with an excavator or a bulldozer

Abstract

The utility model discloses a support wheel used for excavator or bulldozer, including hollow shaft, the hollow shaft is rotatably connected with the wheel body, and the both ends of wheel body all are provided with support seat, and support seat fixedly connected on hollow shaft, install second sealing ring on support seat, the one side of second sealing ring is provided with wear -resisting piece, install a plurality of bearing assemblies in wheel body, and bearing assembly includes bearing inner race, roller and bearing outer ring, the utility model discloses adopting bearing assembly to replace bimetallic straight suit, solve the component wear and tear problem caused by the contact area of bimetallic straight suit and wheel body too big, and then prolong the service life of support wheel, bearing assembly adds sealing piece and pressing piece through being added on the both sides of bearing inner race, improved the leakproofness, and the contact position of wheel body and mounting seat added second sealing ring and wear -resisting piece, and the contact position of hollow shaft and wheel body added first sealing ring, and this forms multiple sealing design to further improve the leakproofness of support wheel, and avoids the hidden danger of oil leakage.

Description

Technical Field

[0001] This utility model relates to the field of track roller technology, and in particular to a track roller used in excavators or bulldozers. Background Technology

[0002] In tracked construction machinery such as excavators and bulldozers, track rollers are one of the core components ensuring the normal operation of the equipment. Excavators and bulldozers typically operate in harsh environments, with track rollers often exposed to mud, dust, and other complex conditions. Furthermore, during operation, track rollers must withstand frequent and intense impact loads. This places extremely high demands on the performance of track rollers, requiring both excellent wear resistance to cope with continuous rolling friction and reliable sealing performance to prevent external impurities from entering and internal lubricating oil leakage. However, existing track rollers have the following drawbacks during use: 1. Existing track rollers use internal symmetrical bimetallic sleeves to isolate the main shaft and the wheel body, thereby assisting the wheel body's rotation. However, due to the large contact area between the bimetallic sleeve and the wheel body, the frictional resistance between them is relatively high. Under long-term operation, the bimetallic sleeve and the wheel body are prone to failure due to excessive wear, which leads to a shortened service life of the track roller; 2. Existing track rollers adopt a single sealing structure design, mainly relying on floating oil seals and O-rings for sealing. This sealing method is difficult to adapt to the sealing requirements under harsh working conditions and is prone to oil leakage. Oil leakage not only causes poor internal lubrication and aggravates the wear between various components, but also allows external impurities to enter, further deteriorating the working condition of the track roller and increasing the maintenance cost and failure risk of the equipment. Utility Model Content

[0003] The purpose of this invention is to provide a track roller for use in excavators or bulldozers to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a support roller for excavators or bulldozers, comprising a hollow shaft, a wheel body rotatably connected to the hollow shaft, support seats provided at both ends of the wheel body, and the support seats fixedly connected to the hollow shaft, a second sealing ring installed on the support seat, a wear-resistant plate provided on one side of the second sealing ring, multiple bearing assemblies installed in the wheel body, the bearing assembly comprising an inner bearing ring, rollers and an outer bearing ring, the inner bearing ring fixedly connected to the hollow shaft, the outer bearing ring fixedly connected to the wheel body, the wear-resistant plate provided on one side of the outer bearing ring, multiple rollers rollingly connected in the gap between the outer bearing ring and the inner bearing ring, a third groove provided at both ends of the inner bearing ring, a sealing plate sleeved in the third groove, a pressure plate provided on one side of the sealing plate, and the pressure plate sleeved in the third groove.

[0005] Preferably, the wheel body has a through hole, and both ends of the through hole are provided with a first-stage groove. The outer rings of the two bearings are respectively fixedly connected in the two first-stage grooves. The wear-resistant plate is sleeved in the first-stage groove. A second-stage groove is provided on one side of the two first-stage grooves, and the two support seats are respectively provided in the two second-stage grooves.

[0006] Preferably, a fourth groove is provided on the outer ring of the bearing at the position corresponding to the third groove, and the pressure plate is sleeved in the fourth groove.

[0007] Preferably, a first retaining ring is provided on the other side of each of the two sealing sheets, and the two first retaining rings are snapped onto the inner ring of the bearing. The two first retaining rings are respectively provided on both sides of the roller. A second retaining ring is snapped onto the outer ring of the bearing at the position corresponding to the first retaining ring, and the two second retaining rings are respectively provided on both sides of the roller.

[0008] Preferably, the support base is fixedly connected to an elastic positioning pin, and the elastic positioning pin is fixedly connected to the hollow shaft. The support base has an annular groove, and the second sealing ring is sleeved in the annular groove. The support base has multiple mounting holes.

[0009] Preferably, the wheel body has a second groove, and both ends of the wheel body are fixedly connected to side rings.

[0010] Preferably, a retaining ring is fixedly connected to the support base, and the retaining ring is sleeved on the hollow shaft, with the retaining ring located on one side of the inner ring of the bearing.

[0011] Preferably, a first groove is provided on the hollow shaft at the position corresponding to the support seat, and a first sealing ring is sleeved in the first groove, and the first sealing ring is sleeved in the support seat.

[0012] This utility model provides a track roller for excavators or bulldozers, which has the following advantages: This utility model uses a bearing assembly to replace the bimetallic sleeve, solving the problem of component wear caused by the excessive contact area between the bimetallic sleeve and the wheel body, thereby extending the service life of the track roller; the bearing assembly improves the sealing performance by adding sealing plates and pressure plates on both sides of the inner ring of the bearing; a second sealing ring and wear-resistant plate are added at the contact position between the wheel body and the mounting seat, and a first sealing ring is added at the contact position between the hollow shaft and the wheel body, thus forming a multi-seal design, thereby further improving the sealing performance of the track roller and avoiding the risk of oil leakage. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall front view sectional structure of this utility model;

[0015] Figure 2 for Figure 1 Enlarged view of the structure of region A in the middle;

[0016] Figure 3 This is a schematic diagram of the overall side view structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the wheel body of this utility model;

[0018] Figure 5 This is a schematic diagram of the main sectional view of the bearing assembly of this utility model;

[0019] Figure 6 This is a side view sectional diagram of the bearing outer ring of this utility model.

[0020] In the diagram: 1. Hollow shaft; 11. Elastic locating pin; 12. First groove; 13. First sealing ring; 2. Wheel body; 21. Second groove; 22. Side ring body; 23. Through hole; 24. First stepped groove; 25. Second stepped groove; 3. Support seat; 31. Mounting hole; 32. Ring groove; 33. Second sealing ring; 34. Retaining ring; 4. Bearing assembly; 41. Bearing inner ring; 42. Third stepped groove; 43. Roller; 44. Bearing outer ring; 45. Fourth stepped groove; 46. First snap ring; 47. Second snap ring; 48. Sealing plate; 49. Pressure plate; 5. Wear-resistant plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Please see the appendix Figure 1 -Appendix Figure 6This utility model provides an embodiment of a support roller for excavators or bulldozers, comprising a hollow shaft 1, a wheel body 2 rotatably connected to the hollow shaft 1, support seats 3 at both ends of the wheel body 2, and the support seats 3 fixedly connected to the hollow shaft 1, a second sealing ring 33 installed on the support seat 3, a wear-resistant plate 5 provided on one side of the second sealing ring 33, and multiple bearing assemblies 4 installed inside the wheel body 2, the bearing assembly 4 including an inner bearing ring 41, rollers 43 and an outer bearing ring 44, the inner bearing ring 41 fixedly connected to the hollow shaft 1, the outer bearing ring 44 fixedly connected to the wheel body 2, the wear-resistant plate 5 provided on one side of the outer bearing ring 44, and multiple rollers 43 rollingly connected in the gap between the outer bearing ring 44 and the inner bearing ring 41. The bearing inner ring 41 has a third groove 42 at both ends. A sealing plate 48 is fitted inside the third groove 42. A pressure plate 49 is provided on one side of the sealing plate 48 and fits inside the third groove 42. The second sealing ring 33 is used to improve the sealing between the wear-resistant plate 5 and the support seat 3. The wear-resistant plate 5 is used to isolate the wheel body 2 and the support seat 3 to avoid frictional wear caused by direct contact between the wheel body 2 and the support seat 3. The bearing assembly 4 is used to realize the rotational connection between the hollow shaft 1 and the wheel body 2. The bearing inner ring 41, roller 43 and bearing outer ring 44 constitute the main body of the bearing. The third groove 42 is used to accommodate the sealing plate 48 and the pressure plate 49. The sealing plate 48 and the pressure plate 49 make the main body of the bearing waterproof and dustproof. The wheel body 2 has a... A through hole 23 has a first groove 24 at both ends, and two bearing outer rings 44 are fixedly connected to the two first grooves 24 respectively. A wear-resistant plate 5 is sleeved in the first groove 24. A second groove 25 is provided on one side of each of the two first grooves 24, and two support seats 3 are respectively provided in the two second grooves 25. The first groove 24 is used to accommodate the bearing outer ring 44, and the second groove 25 is used to accommodate the support seat 3. A fourth groove 45 is opened on the bearing outer ring 44 at the position corresponding to the third groove 42, and a pressure plate 49 is sleeved in the fourth groove 45. The fourth groove 45 is used to accommodate the pressure plate 49. A first retaining spring 46 is provided on the other side of each of the two sealing plates 48, and the two first retaining springs 46 are both snapped into the bearing. On the inner ring 41, two first snap rings 46 are respectively disposed on both sides of the roller 43. On the outer ring 44 of the bearing, a second snap ring 47 is snapped at the position corresponding to the first snap rings 46, and the two second snap rings 47 are respectively disposed on both sides of the roller 43. The first snap rings 46 and the second snap rings 47 are used to limit the roller 43. An elastic positioning pin 11 is fixedly connected to the support seat 3, and the elastic positioning pin 11 is fixedly connected to the hollow shaft 1. An annular groove 32 is opened on the support seat 3, and a second sealing ring 33 is sleeved in the annular groove 32. Multiple mounting holes 31 are opened on the support seat 3. The elastic positioning pin 11 is used to lock the support seat 3 on the hollow shaft 1. The annular groove 32 is used to accommodate the second sealing ring 33. The mounting holes 31 are used to install screws.A second groove 21 is formed on the wheel body 2, and side rings 22 are fixedly connected to both ends of the wheel body 2. The second groove 21 gives the wheel body 2 a saddle-shaped shape, improving the load-bearing capacity of the wheel body 2. The side rings 22 are used to limit the track. A retaining ring 34 is fixedly connected to the support seat 3, and the retaining ring 34 is sleeved on the hollow shaft 1. The retaining ring 34 is located on one side of the inner ring 41 of the bearing, and the retaining ring 34 is used to limit the inner ring 41 of the bearing. A first groove 12 is formed on the hollow shaft 1 at the position corresponding to the support seat 3. A first sealing ring 13 is sleeved in the first groove 12, and the first sealing ring 13 is sleeved in the support seat 3. The first groove 12 is used to accommodate the first sealing ring 13, and the first sealing ring 13 is used to improve the sealing between the hollow shaft 1 and the support seat 3.

[0023] Working principle: When assembling and using this utility model, the bearing body is composed of the inner ring 41, the roller 43, and the outer ring 44. The roller 43 is limited by the first retaining ring 46 and the second retaining ring 47. The sealing plate 48 and the pressure plate 49 are installed in the third groove 42 in sequence, so that the pressure plate 49 is pressed into the fourth groove 45, thereby completing the assembly of the bearing assembly 4. The assembled bearing assembly 4 is installed in the wheel body 2, so that the outer ring 44 is pressed into the first groove 24. The wear-resistant plate 5 is installed in the first groove 24 in sequence. The hollow shaft 1 is inserted into the through hole of the wheel body 2. In step 23, the inner ring 41 of the bearing is installed on the hollow shaft 1, the first sealing ring 13 is installed in the first groove 12, the second sealing ring 33 is installed in the annular groove 32, and the support seat 3 is installed on the hollow shaft 1 through the elastic positioning pin 11, so that one end of the support seat 3 is fitted in the second stepped groove 25, the second sealing ring 33 is attached to the wear-resistant plate 5, and the retaining ring 34 abuts against the inner ring 41 of the bearing; wherein, the second groove 21 makes the wheel body 2 present a saddle shape, which improves the load-bearing capacity of the wheel body 2, the side ring 22 is used to limit the track, and the mounting hole 31 is used to install screws.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A track roller for use on an excavator or bulldozer, comprising a hollow shaft (1), characterized in that: A wheel body (2) is rotatably connected to the hollow shaft (1). Support seats (3) are provided at both ends of the wheel body (2), and the support seats (3) are fixedly connected to the hollow shaft (1). A second sealing ring (33) is installed on the support seat (3), and a wear-resistant plate (5) is provided on one side of the second sealing ring (33). Multiple bearing assemblies (4) are installed inside the wheel body (2). Each bearing assembly (4) includes an inner bearing ring (41), a roller (43), and an outer bearing ring (44). The inner bearing ring (41) is fixedly connected to the support seat (1). On the hollow shaft (1), the outer ring (44) of the bearing is fixedly connected to the wheel body (2), and the wear-resistant plate (5) is set on one side of the outer ring (44). Multiple rollers (43) are rolled in the gap between the outer ring (44) and the inner ring (41). The two ends of the inner ring (41) of the bearing are provided with a third groove (42). A sealing plate (48) is sleeved in the third groove (42). A pressure plate (49) is provided on one side of the sealing plate (48), and the pressure plate (49) is sleeved in the third groove (42).

2. The track roller for use in an excavator or bulldozer according to claim 1, characterized in that: The wheel body (2) has a through hole (23), and both ends of the through hole (23) are provided with a first groove (24). The two bearing outer rings (44) are respectively fixedly connected in the two first grooves (24). The wear-resistant plate (5) is sleeved in the first groove (24). A second groove (25) is provided on one side of the two first grooves (24), and the two support seats (3) are respectively provided in the two second grooves (25).

3. The track roller for use in an excavator or bulldozer according to claim 1, characterized in that: A fourth groove (45) is provided on the outer ring (44) of the bearing, corresponding to the position of the third groove (42), and the pressure plate (49) is sleeved in the fourth groove (45).

4. A track roller for use in an excavator or bulldozer according to claim 1, characterized in that: Each of the two sealing plates (48) is provided with a first retaining ring (46) on the other side, and both first retaining rings (46) are snapped onto the inner ring (41) of the bearing. The two first retaining rings (46) are respectively located on both sides of the roller (43). A second retaining ring (47) is snapped onto the outer ring (44) of the bearing at the position corresponding to the first retaining rings (46), and the two second retaining rings (47) are respectively located on both sides of the roller (43).

5. A track roller for use in an excavator or bulldozer according to claim 1, characterized in that: An elastic positioning pin (11) is fixedly connected to the support base (3), and the elastic positioning pin (11) is fixedly connected to the hollow shaft (1). An annular groove (32) is provided on the support base (3), and a second sealing ring (33) is sleeved in the annular groove (32). Multiple mounting holes (31) are provided on the support base (3).

6. A track roller for use in an excavator or bulldozer according to claim 2, characterized in that: The wheel body (2) has a second groove (21) and both ends of the wheel body (2) are fixedly connected to side ring bodies (22).

7. A track roller for use in an excavator or bulldozer according to claim 5, characterized in that: A retaining ring (34) is fixedly connected to the support base (3), and the retaining ring (34) is sleeved on the hollow shaft (1). The retaining ring (34) is located on one side of the inner ring (41) of the bearing.

8. A track roller for use in an excavator or bulldozer according to claim 7, characterized in that: A first groove (12) is provided at a position on the hollow shaft (1), and a first sealing ring (13) is sleeved in the first groove (12), and the first sealing ring (13) is sleeved in the support base (3).

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