Bearing wheel for use in a bulldozer
By using ball bearing assemblies and roller bearing assemblies on the bulldozer's load-bearing wheels, and by adding sealing plates and sealing rings at key contact points, the problems of load-bearing wheel wear and oil leakage have been solved, thereby improving the reliability and service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QUANZHOU SONGTELI CONSTR MASCH CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-06-26
AI Technical Summary
Existing bulldozer load-bearing rollers suffer from severe wear due to high frictional resistance caused by bimetallic straight sleeves, and the sealing structure is prone to oil leakage under harsh working conditions, affecting equipment lifespan and maintenance costs.
By replacing the bimetallic bushing with ball bearing assemblies and roller bearing assemblies, and by adding sealing plates and sealing rings at the contact points, a multi-seal structure is formed to improve sealing performance.
It extends the service life of the load-bearing rollers, avoids oil leaks, and reduces equipment maintenance costs and failure risks.
Smart Images
Figure CN224409427U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of load-bearing wheel technology, and in particular to a load-bearing wheel used in bulldozers. Background Technology
[0002] In the field of tracked construction machinery, the load-bearing roller, as a key load-bearing component of a bulldozer, bears the core function of supporting the weight of the entire machine. It must also roll along the track rails or track plates to cooperate with the tracks in enabling the equipment to move. Furthermore, the load-bearing roller also restricts the lateral displacement of the tracks, effectively preventing lateral slippage during operation and ensuring the stability and safety of the equipment. However, existing bulldozer load-bearing rollers have the following drawbacks: 1. Existing load-bearing rollers use symmetrical bimetallic sleeves to isolate the main shaft and the wheel body, assisting in the rotation of the wheel body. Due to the large contact area between the bimetallic sleeve and the wheel body, the frictional resistance between them is relatively high. Over long-term operation, this can easily lead to excessive wear and failure, shortening the service life of the load-bearing roller; 2. Existing load-bearing rollers use a single sealing structure design, mainly relying on floating oil seals and O-rings for sealing. Therefore, they are difficult to adapt to the sealing requirements under harsh working conditions, and are prone to oil leakage. This not only leads to poor internal lubrication and accelerated component wear, but also allows external impurities to further deteriorate the working condition of the load-bearing roller, increasing equipment maintenance costs and the risk of failure. Utility Model Content
[0003] The purpose of this invention is to provide a load-bearing wheel for 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 load-bearing wheel for bulldozers, including a hollow shaft, a wheel body rotatably connected to the hollow shaft, a through hole opened in the wheel body, a first groove opened at both ends of the through hole, a ball bearing assembly installed in the first groove, a second groove provided on one side of the first groove, a roller bearing assembly installed in the second groove, a third groove provided on one side of the second groove, a support seat sleeved in the third groove, and the support seat, the ball bearing assembly and the roller bearing assembly are all fixedly connected to the hollow shaft.
[0005] Preferably, the wheel body has a second groove, and both ends of the wheel body are fixedly connected to side rings.
[0006] Preferably, the ball bearing assembly includes a first sealing plate, a first pressure plate, a first bearing inner ring, a first roller, and a first bearing outer ring. The first bearing inner ring is fixedly connected to the hollow shaft, and the first bearing outer ring is fixedly connected to the wheel body. Multiple first rollers are rolled in the gap between the first bearing outer ring and the first bearing inner ring. Both ends of the first bearing inner ring are fitted with first pressure plates, which are fitted inside the first bearing outer ring. A first sealing plate is provided on one side of the first pressure plate, and the first sealing plate is fitted onto the first bearing inner ring.
[0007] Preferably, the roller bearing assembly includes a second sealing plate, a second pressure plate, a second bearing inner ring, a second roller, a second bearing outer ring, a first retaining ring, and a second retaining ring. The second bearing inner ring is fixedly connected to the hollow shaft, and the second bearing outer ring is fixedly connected to the wheel body. Multiple second rollers are rolled in the gap between the second bearing outer ring and the second bearing inner ring. Both ends of the second bearing inner ring are fitted with second pressure plates, which are fitted inside the second bearing outer ring. A second sealing plate is provided on one side of the second pressure plate and is fitted onto the second bearing inner ring. A first retaining ring is provided on one side of the second sealing plate and is snapped onto the second bearing inner ring. Two first retaining rings are respectively provided on both sides of the second roller. A second retaining ring is snapped onto the second bearing outer ring at the position corresponding to the first retaining ring, and two second retaining rings are respectively provided on both sides of the second roller.
[0008] 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.
[0009] Preferably, the support base has a mounting hole, and an elastic positioning pin is fixedly connected to the support base, and the elastic positioning pin is fixedly connected to the hollow shaft.
[0010] Preferably, an annular groove is provided on the support base at the position corresponding to the outer ring of the second bearing, a second sealing ring is sleeved in the annular groove, a wear-resistant plate is provided on one side of the second sealing ring, and the wear-resistant plate is sleeved in the second groove, and the wear-resistant plate is provided on one side of the outer ring of the second bearing.
[0011] This utility model provides a load-bearing roller for bulldozers, which has the following advantages: This utility model uses ball bearing assemblies and roller bearing assemblies instead of bimetallic bushings, solving the problem of component wear caused by the excessive contact area between the bimetallic bushing and the wheel body, thereby extending the service life of the load-bearing roller; by adding sealing plates and pressure plates to the ball bearing assemblies and roller shafts, adding a second sealing ring and wear-resistant plate at the contact position between the wheel body and the mounting seat, and adding a first sealing ring at the contact position between the hollow shaft and the wheel body, a multi-seal structure is formed, thereby improving the sealing performance of the load-bearing roller and avoiding the risk of oil leakage. Attached Figure Description
[0012] 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.
[0013] Figure 1 This is a schematic diagram of the overall front view sectional structure of this utility model;
[0014] Figure 2 for Figure 1 Enlarged view of the structure of region A in the middle;
[0015] Figure 3 This is a schematic diagram of the overall side view structure of this utility model;
[0016] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the wheel body of this utility model;
[0017] Figure 5 This is a schematic diagram of the main sectional view of the roller bearing assembly of this utility model;
[0018] Figure 6 This is a side sectional view of the outer ring of the second bearing of this utility model;
[0019] Figure 7 This is a schematic diagram of the main sectional view of the ball bearing assembly 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; 26. Third stepped groove; 3. Support seat; 31. Mounting hole; 32. Ring groove; 33. Second sealing ring; 4. Ball bearing assembly; 41. First sealing plate; 42. First pressure plate; 43. First bearing inner ring; 44. First roller; 45. First bearing outer ring; 5. Roller bearing assembly; 51. Second sealing plate; 52. Second pressure plate; 53. Second bearing inner ring; 54. Second roller; 55. Second bearing outer ring; 56. First snap ring; 57. Second snap ring; 6. 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 7This utility model provides an embodiment of a load-bearing wheel for a bulldozer, comprising a hollow shaft 1, a wheel body 2 rotatably connected to the hollow shaft 1, a through hole 23 inside the wheel body 2, and first grooves 24 at both ends of the through hole 23, in which ball bearing assemblies 4 are installed. A second groove 25 is provided on one side of the first groove 24, in which roller bearing assemblies 5 are installed. A third groove 26 is provided on one side of the second groove 25, in which a support is sleeved. Support 3, ball bearing assembly 4, and roller bearing assembly 5 are all fixedly connected to hollow shaft 1. First groove 24 is used to accommodate ball bearing assembly 4, second groove 25 is used to accommodate roller bearing assembly 5, and third groove 26 is used to accommodate support 3. Support 3 is used to support hollow shaft 1. Ball bearing assembly 4 cooperates with roller bearing assembly 5 to realize the rotational connection between hollow shaft 1 and wheel body 2. Second groove 21 is opened on wheel body 2, and side rings 22 are fixedly connected to both ends of wheel body 2. The second groove 21 gives the wheel body 2 a saddle-shaped shape, improving its load-bearing capacity. The side ring 22 is used to limit the track. The ball bearing assembly 4 includes a first sealing plate 41, a first pressure plate 42, a first bearing inner ring 43, a first roller 44, and a first bearing outer ring 45. The first bearing inner ring 43 is fixedly connected to the hollow shaft 1, and the first bearing outer ring 45 is fixedly connected inside the wheel body 2. Multiple rollers are rolled in the gap between the first bearing outer ring 45 and the first bearing inner ring 43. First roller 44 and first bearing inner ring 43 are both fitted with first pressure plates 42, and the first pressure plates 42 are fitted inside the first bearing outer ring 45. A first sealing plate 41 is provided on one side of the first pressure plate 42, and the first sealing plate 41 is fitted on the first bearing inner ring 43. The first bearing inner ring 43, the first roller 44 and the first bearing outer ring 45 constitute the main structure of the ball bearing assembly 4. The first sealing plate 41 is used for dust and water protection, and the first pressure plate 42 is used to limit the first sealing plate 41.The roller bearing assembly 5 includes a second sealing plate 51, a second pressure plate 52, a second bearing inner ring 53, second rollers 54, a second bearing outer ring 55, a first retaining ring 56, and a second retaining ring 57. The second bearing inner ring 53 is fixedly connected to the hollow shaft 1, and the second bearing outer ring 55 is fixedly connected to the wheel body 2. Multiple second rollers 54 are rolled in the gap between the second bearing outer ring 55 and the second bearing inner ring 53. The second pressure plates 52 are sleeved on both ends of the second bearing inner ring 53 and are sleeved inside the second bearing outer ring 55. A second sealing plate 51 is provided on one side of the second pressure plate 52. The second sealing plate 51 is sleeved on the inner ring 53 of the second bearing. A first retaining ring 56 is provided on one side of the second sealing plate 51, and the first retaining ring 56 is engaged with the inner ring 53 of the second bearing. Two first retaining rings 56 are respectively provided on both sides of the second roller 54. A second retaining ring 57 is engaged on the outer ring 55 of the second bearing at the position corresponding to the first retaining rings 56, and two second retaining rings 57 are respectively provided on both sides of the second roller 54. The inner ring 53 of the second bearing, the second roller 54, and the outer ring 55 of the second bearing constitute the main structure of the roller bearing assembly 5. The second sealing plate 51 is used for dust and water protection, and the second pressure plate 52 is used for... The first retaining ring 56 and the second retaining ring 57 limit the second sealing plate 51, and limit the second roller 54. A first groove 12 is provided 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 is fitted into 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. An installation hole 31 is provided on the support seat 3, and an elastic positioning pin 11 is fixedly connected to the support seat 3. The elastic positioning pin 11 is fixedly connected to the hollow shaft 1. Pin 11 is used to lock the support seat 3 onto the hollow shaft 1; an annular groove 32 is provided on the support seat 3 at the position corresponding to the outer ring 55 of the second bearing, and a second sealing ring 33 is sleeved in the annular groove 32. A wear-resistant plate 6 is provided on one side of the second sealing ring 33, and the wear-resistant plate 6 is sleeved in the second stepped groove 25. The wear-resistant plate 6 is located on one side of the outer ring 55 of the second bearing. The annular groove 32 is used to accommodate the second sealing ring 33. The second sealing ring 33 is used to improve the sealing performance between the wear-resistant plate 6 and the support seat 3. The wear-resistant plate 6 is used to isolate the wheel body 2 and the support seat 3, avoiding frictional wear caused by direct contact between the wheel body 2 and the support seat 3.
[0023] Working principle: When assembling and using this utility model, the first sealing plate 41 and the first pressure plate 42 are sequentially installed on the ball bearing assembly 4, the second sealing plate 51 and the second pressure plate 52 are sequentially installed on the roller bearing assembly 5, the ball bearing assembly 4 is installed in the first stepped groove 24, the roller bearing assembly 5 and the wear-resistant plate 6 are sequentially installed in the second stepped groove 25, the hollow shaft 1 is inserted into the through hole 23 of the wheel body 2, so that the ball bearing assembly 4 and the roller bearing assembly 5 are 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 the support seat 3 is fitted in the third stepped groove 26, and the second sealing ring 33 is attached to the... The wear-resistant plate 6; wherein, the second groove 21 makes the wheel body 2 have a saddle shape, which improves the load-bearing capacity of the wheel body 2; the side ring 22 is used to limit the track; the mounting hole 31 is used to install screws; the first bearing inner ring 43, the first roller 44 and the first bearing outer ring 45 constitute the main structure of the ball bearing assembly 4; the first sealing plate 41 is used for dust and water protection; the first pressure plate 42 is used to limit the first sealing plate 41; the second bearing inner ring 53, the second roller 54 and the second bearing outer ring 55 constitute the main structure of the roller bearing assembly 5; the second sealing plate 51 is used for dust and water protection; the second pressure plate 52 is used to limit the second sealing plate 51; the first retaining ring 56 and the second retaining ring 57 are used to limit the second roller 54.
[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 load-bearing wheel for a bulldozer, comprising a hollow axle (1), characterized in that: A wheel body (2) is rotatably connected to the hollow shaft (1). A through hole (23) is provided in the wheel body (2). A first groove (24) is provided at both ends of the through hole (23). A ball bearing assembly (4) is installed in the first groove (24). A second groove (25) is provided on one side of the first groove (24). A roller bearing assembly (5) is installed in the second groove (25). A third groove (26) is provided on one side of the second groove (25). A support seat (3) is sleeved in the third groove (26). The support seat (3), the ball bearing assembly (4), and the roller bearing assembly (5) are all fixedly connected to the hollow shaft (1).
2. The load-bearing roller for a bulldozer according to claim 1, 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).
3. The load-bearing roller for a bulldozer according to claim 1, characterized in that: The ball bearing assembly (4) includes a first sealing plate (41), a first pressure plate (42), a first bearing inner ring (43), a first roller (44), and a first bearing outer ring (45). The first bearing inner ring (43) is fixedly connected to the hollow shaft (1), and the first bearing outer ring (45) is fixedly connected to the wheel body (2). Multiple first rollers (44) are rolled in the gap between the first bearing outer ring (45) and the first bearing inner ring (43). The first pressure plate (42) is sleeved on both ends of the first bearing inner ring (43), and the first pressure plate (42) is sleeved inside the first bearing outer ring (45). A first sealing plate (41) is provided on one side of the first pressure plate (42), and the first sealing plate (41) is sleeved on the first bearing inner ring (43).
4. A load-bearing roller for a bulldozer according to claim 1, characterized in that: The roller bearing assembly (5) includes a second sealing plate (51), a second pressure plate (52), a second bearing inner ring (53), a second roller (54), a second bearing outer ring (55), a first retaining ring (56), and a second retaining ring (57). The second bearing inner ring (53) is fixedly connected to the hollow shaft (1), and the second bearing outer ring (55) is fixedly connected to the wheel body (2). Multiple second rollers (54) are rolled in the gap between the second bearing outer ring (55) and the second bearing inner ring (53). The second pressure plates (52) are sleeved on both ends of the second bearing inner ring (53). A second sealing plate (51) is provided on one side of the second pressure plate (52) and sleeved inside the outer ring (55) of the second bearing. The second sealing plate (51) is sleeved on the inner ring (53) of the second bearing. A first snap ring (56) is provided on one side of the second sealing plate (51) and snaps onto the inner ring (53) of the second bearing. Two first snap rings (56) are respectively provided on both sides of the second roller (54). A second snap ring (57) is snapped onto the outer ring (55) of the second bearing at the position corresponding to the first snap ring (56). Two second snap rings (57) are respectively provided on both sides of the second roller (54).
5. A load-bearing roller for a bulldozer according to claim 1, 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).
6. A load-bearing roller for a bulldozer according to claim 5, characterized in that: The support base (3) has an installation hole (31) and 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).
7. A load-bearing roller for a bulldozer according to claim 6, characterized in that: An annular groove (32) is provided on the support base (3) at the position corresponding to the outer ring (55) of the second bearing. A second sealing ring (33) is sleeved in the annular groove (32). A wear-resistant plate (6) is provided on one side of the second sealing ring (33), and the wear-resistant plate (6) is sleeved in the second stepped groove (25). The wear-resistant plate (6) is located on one side of the outer ring (55) of the second bearing.