Thrust wheel

Abstract

The invention belongs to the technical field of crawler belt walking mechanisms, and particularly relates to a thrust wheel which comprises two thrust wheel half bodies, the two thrust wheel half bodies are arranged in half in the axial direction, each thrust wheel half body comprises a tubular outer wheel ring, a tubular inner wheel ring and a radial plate, the outer wheel ring and the inner wheel ring are arranged in a concentric and sleeved mode, and the radial plates connect the outer wheel ring and the inner wheel ring. The outer wheel rims, the radial plates and the inner wheel rims of the thrust wheel half bodies are integrally formed, the axial end edges, close to the sides, of the outer wheel rims of the two thrust wheel half bodies are connected, and the axial end edges, close to the sides, of the inner wheel rims of the two thrust wheel half bodies are connected. On one hand, the number of overall welding seams is reduced, the overall welding manufacturing cost and the welding operation amount of the thrust wheel are reduced, on the other hand, center hole waste materials generated when an original thrust wheel is punched are fully utilized to form the inner wheel ring, a traditional split type wheel shaft sleeve is replaced, the material utilization rate is greatly increased, and the production cost is reduced. And meanwhile, the overall machining efficiency of the thrust wheel is improved.

Description

Technical Field

[0001] The present invention relates to a crawler running gear, and more particularly to a track roller. Background Art

[0002] A track roller is an important component in a crawler running gear for carrying the weight of a walking machine. It transmits the overall weight of the machine to the ground and supports the track structure. To solve problems such as the large self-weight, low material utilization rate, and low production efficiency of cast track rollers, Chinese Patent No. CN215706749U discloses a spin-forming track roller for a crawler machine, which includes a spin-formed track roller body. A central cavity is provided in the middle of the track roller body. A central shaft sleeve is fixedly installed in the middle of the track roller body. A sealing plate for encapsulating the central cavity is sleeved on the outer surface of the central shaft sleeve. A central shaft is rotatably installed in the middle of the central shaft sleeve. As Figure 1 shown, the track roller body 1 includes a hub body 11 and a support plate body 12 that are integrally connected to each other. A sealed connection is achieved between the connection of the support plate body 12 and the central shaft sleeve 2. And the connections of the sealing plate 3 with the central shaft sleeve 2 and the hub body 11 are integrally connected by welding, so that a closed cavity can be formed in the central cavity 13.

[0003] In the above technical solution, although it can prevent external sediment, water, and other impurities from entering the central cavity and reducing the service life of the track roller, effective sealed welding needs to be implemented between the sealing plate, the central shaft sleeve, and the hub body in the track roller body. The overall number of welds is too large. This not only significantly increases the overall welding manufacturing cost, but also the welding workload is very heavy, affecting production efficiency. Secondly, the track roller and the central shaft sleeve are processed separately and then assembled. On the one hand, it affects production efficiency, and on the other hand, the waste material of the middle hole punched out before the track roller is spun cannot be effectively utilized, and the production cost will also increase significantly. Summary of the Invention

[0004] The present invention provides a track roller. Starting from aspects such as the wheel body composition structure and welding workload, on the premise of meeting the product use requirements, the manufacturing cost of the track roller is reduced and the processing efficiency is improved.

[0005] To achieve the above object, the technical solution adopted is: a track roller, which includes two track roller half-bodies. The two track roller half-bodies are arranged in half in the axial direction. Each track roller half-body includes a tubular outer wheel ring and an inner wheel ring that are concentrically sleeved, and a spoke plate connecting the outer wheel ring and the inner wheel ring. The outer wheel ring, the spoke plate, and the inner wheel ring of the track roller half-body are integrally formed. The adjacent side axial end edges of the outer wheel rings of the two track roller half-bodies are connected, and the adjacent side axial end edges of the inner wheel rings of the two track roller half-bodies are connected.

[0006] Compared with the prior art, the technical effects of the present invention are as follows: The outer rim, spoke plate, and inner rim of the idler half body are integrally formed. Compared with the traditional solution of separately machining the idler and the wheel axle sleeve, on the one hand, the overall number of welds is reduced, the overall welding manufacturing cost and welding workload of the idler are reduced, and on the other hand, the waste of the middle hole generated during the punching of the original idler is fully utilized to form the inner rim, replacing the traditional split-type wheel axle sleeve for the installation of bearings, wheel axles, and end covers inside, greatly improving the material utilization rate. At the same time, the entire wheel body is formed at one time, effectively improving the overall processing efficiency of the idler. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a schematic diagram of the prior art;

[0008] Figure 2 is a schematic diagram of the bearing limit ring;

[0009] Figure 3 is a schematic diagram of the first connecting sleeve;

[0010] Figure 4 is a schematic diagram of the snap ring cooperating with the second connecting sleeve;

[0011] Figure 5 is Figure 4 the enlarged view of part A in

[0012] Figure 6 is a schematic diagram of the bearing limit ring cooperating with the second connecting sleeve;

[0013] Figure 7 is a schematic diagram of the first connecting sleeve cooperating with the second connecting sleeve;

[0014] Figure 8 is a schematic diagram of the third connecting sleeve;

[0015] Figure 9 is a schematic diagram of the first embodiment of the cross-sectional shape of the idler half body;

[0016] Figure 10 is a schematic diagram of the second embodiment of the cross-sectional shape of the idler half body;

[0017] Figure 11 is a schematic diagram of the third embodiment of the cross-sectional shape of the idler half body;

[0018] Figure 12 is a schematic diagram of the fourth embodiment of the cross-sectional shape of the idler half body. DETAILED DESCRIPTION OF THE INVENTION

[0019] The following will further elaborate on the present invention in detail in conjunction with the attached Figure 1-12 drawings and related content:

[0020] A track roller. The track roller 10 includes two track roller half bodies 10a which are arranged in a split manner in the axial direction. The track roller half body 10a includes a tubular outer ring 11 and an inner ring 12 which are coaxially sleeved, and a spoke plate 13 connecting the outer ring 11 and the inner ring 12. The outer ring 11, the spoke plate 13 and the inner ring 12 of the track roller half body 10a are integrally formed. The adjacent side axial end edges of the outer rings 11 of the two track roller half bodies 10a are connected, and the adjacent side axial end edges of the inner rings 12 of the two track roller half bodies 10a are connected.

[0021] In the above technical solution, the track roller 10 is composed of two track roller half bodies 10a arranged in a split manner. Among them, the outer ring 11, the spoke plate 13 and the inner ring 12 of the track roller half body 10a are integrally formed to form an integral track roller half body 10a. In addition to the traditional casting or forging process forming method, the track roller half body 10a can also be formed by spinning or stamping processes. Compared with the traditional track roller 10 composed of a split wheel body and a wheel shaft sleeve, on the one hand, the number of welds of the whole track roller 10 is reduced. That is, it is only necessary to weld and connect the adjacent side axial end edges of the outer rings 11 of the two track roller half bodies 10a and the adjacent side axial end edges of the inner rings 12 of the two track roller half bodies 10a, reducing the overall welding workload and welding manufacturing cost of the track roller 10.

[0022] On the other hand, the raw material plate of the traditional split track roller needs to be punched with a large enough central hole for the subsequent wheel shaft sleeve to pass through. However, the track roller 10 provided in this application cancels the wheel shaft sleeve. First, a ring plate is punched out on the plate, and then the overall contour of the track roller half body 10a is formed by spinning or stamping. When the raw material plate is punched, the punching area of the central hole is greatly reduced. The central hole waste that would originally be punched out is directly formed into the inner ring by spinning or stamping processes, replacing the traditional split wheel shaft sleeve, and providing a place for the bearing, wheel shaft and end cover to be placed inside. This significantly improves the material utilization rate. At the same time, the whole wheel body is formed at one time, effectively improving the overall production efficiency of the track roller 10.

[0023] In addition, the structure of the track roller 10 provided in this application can be processed only by the stamping process, which can improve the process defect that the spinning process has relatively high requirements for materials (the spinning process generally requires hot-rolled plate materials such as SPHC, SPHD, SPHE, etc., with high material quality requirements and high prices. Moreover, if you want to increase the hardness of this kind of material, you can only do it through carburizing, nitriding, carbonitriding, etc., and the heat treatment cost is high). In contrast, the track roller 10 provided in this application can be processed with ordinary steel plates such as Q235 and 35#, with low material costs. Later, the surface hardness of the product can be improved by medium- and high-frequency induction quenching, which can perfectly solve the process limitation problem that it is difficult to perform induction quenching on spinning products.

[0024] It should be noted that for raw material steel plates of general size, from the perspective of the material utilization rate of the raw material steel plate, the outer diameters of the annular profiles that are punched out to form two half-wheel carriers 10a may vary slightly, but it is necessary to ensure that after the annular profiles are formed into half-wheel carriers 10a by spinning or stamping, the radial dimensions of the two half-wheel carriers 10a are the same, and to ensure that the axial end edges on the adjacent sides of the outer rims 11 of the two half-wheel carriers 10a and the axial end edges on the adjacent sides of the inner rims 12 of the two half-wheel carriers 10a are aligned and welded. In this way, for the remaining plate part on the raw material steel plate that cannot be punched out to form a large size, an annular plate with a relatively small size can be punched out to improve the utilization rate of the raw material steel plate.

[0025] As a preferred solution, the two half-wheel carriers 10a are symmetrically arranged in half in the axial direction, and the sizes and contours of the two half-wheel carriers 10a are the same.

[0026] As a preferred solution, considering the forming method of the half-wheel carrier 10a by spinning or stamping process, the outer rim or inner rim of the outer rim 11 is connected to the outer rim of the inner rim 12 by a web 13, and the overall contour of the half-wheel carrier 10a can be formed by pressing.

[0027] In this application, considering that bearings need to be installed in the lumen formed by the inner rim 12 of the wheel carrier 10 and reliable axial limit constraints need to be provided for the bearings, the following provides a variety of ways to limit the bearings:

[0028] First, as Figure 2 shown, the inner rim of the inner rim 12 extends radially inward along the wheel body 10 to form an annular bearing limit ring 121. In this solution, the bearing is embedded in the lumen formed by the inner rim 12, and the bearing limit ring 121 formed by the protrusion of the inner rim of the inner rim 12 can limit the bearing, replacing the protrusion on the inner circumferential surface of the traditional split wheel axle sleeve to meet the positioning requirements of the bearing.

[0029] Furthermore, the inner rims of the outer rims 11 of the two half-wheel carriers 10a are welded together, and the inner rims of the inner rims 12 of the two half-wheel carriers 10a are welded together to ensure the reliable connection between the two half-wheel carriers 10a. The joints of the two inner rims 12 can be welded together by friction welding.

[0030] Second, as Figure 3 shown, the inner rims of the outer rims 11 of the two half-wheel carriers 10a are welded together, and internal threads are provided on the inner pipe end sections of the inner rims 12. The first connecting sleeve 20 forms a threaded fit with the internal threads of the two inner rims 12. In this solution, the two inner rims 12 are connected by the first connecting sleeve 20. On the one hand, the relative displacement between the two inner rims 12 is restricted, and on the other hand, the first connecting sleeve 20 protrudes into the lumen of the inner rim 12 to form a limiting component for the bearing.

[0031] Thirdly, as Figure 4 shown in Figure 5 , the inner rims of the outer rims 11 of the two heavy wheel halves 10a are welded together. A limiting fit for restricting axial separation between each other is provided between the two inner rims 12. An annular groove 122 is formed on the inner peripheral surface at the position of the inner rim of the inner rim 12. The annular groove 122 is arranged concentrically with the inner rim 12, and an annular snap ring 30 is embedded in the cavity of the annular groove 122. The inner ring edge of the snap ring 30 protrudes outside the annular groove 122. In this solution, the annular snap ring 30 is clamped in the annular groove 122 on the inner peripheral surface of the inner rim 12, and the snap ring 30 forms a limiting component of the bearing. Moreover, a limiting fit for restricting axial separation between each other is provided between the two inner rims 12 to ensure that the two inner rims 12 will not separate from each other.

[0032] Fourthly, as Figure 4 , 6 , and shown in 7, for the above three bearing limiting solutions, in order to ensure stable connection between the two inner rims 12, in addition to welding the two inner rims 12 together, the inner rims of the outer rims 11 of the two heavy wheel halves 10a can also be welded together. External threads are provided on the inner pipe end sections of the inner rims 12, and the second connecting sleeve 40 forms a threaded fit with the external threads of the two inner rims 12. This solution does not focus on how to form a bearing limiting component. More importantly, it lies in how to connect and fix the two inner rims 12. This solution uses the second connecting sleeve 40 as a transition connecting piece to connect the two inner rims 12 together by means of threaded fit.

[0033] Among them, for the method of using the first connecting sleeve 20 to be threadedly connected to the inner rim 12 to form a bearing limit, adding the second connecting sleeve 40 can play a role in further reinforcement.

[0034] Fifthly, as Figure 8 shown, the inner rims of the outer rims 11 of the two heavy wheel halves 10a are welded together. The inner rims of the two inner rims 12 are arranged at intervals. External threads are provided on the inner pipe end sections of the inner rims 12. The third connecting sleeve 50 forms a threaded fit with the external threads of the two inner rims 12. A convex ring 51 is connected at the middle position of the inner peripheral surface of the third connecting sleeve 50. The convex ring 51 is arranged concentrically with the third connecting sleeve 50 and is integrally formed. The convex ring 51 protrudes into the pipe cavity of the inner rim 12 through the interval area between the two inner rims 12. In this solution, a threaded fit is formed between the third connecting sleeve 50 and the inner rim 12 to connect the two inner rims 12 together. Further, the convex ring 51 integrally formed on the inner peripheral surface of the third connecting sleeve 50 forms a bearing limiting component. The convex ring 51 protrudes into the pipe cavity of the inner rim 12 through the interval area between the two inner rims 12, and the bearing can abut against the end face of the convex ring 51 to form a limit.

[0035] In addition, the present application provides the following multiple solutions for the overall contour shape of the track roller half body 10a:

[0036] First, as Figure 9 shown, the inner rim of the outer rim 11 is connected to the outer rim of the inner rim 12 by the spoke plate 13, and the cross-section of the track roller half body 10a is overall in an S shape.

[0037] Second, as Figure 10 shown, the inner rim of the outer rim 11 is connected to the inner rim of the inner rim 12 by the spoke plate 13. The two spoke plates 13 are arranged in contact with each other and are connected together by bolts. In this solution, the connection of bolts between the two spoke plates 13 can also be cancelled, and a welding connection method can also be adopted.

[0038] For the above two overall contour solutions of the track roller half body 10a, an arc-shaped rim consumption section 111 extends from the outer rim of the outer rim 11 towards the side where the axis of the wheel body 10 is located. In this solution, during use, the rim consumption section 111 exposed on the outer rim of the outer rim 11 is adjacent to the limiting part protruding from the middle of the crawler. When the crawler is deflected or the traveling mechanism turns, the rim consumption section 111 abuts and cooperates with the limiting part protruding from the middle of the crawler. Even if the rim consumption section 111 is worn after long-term application, the plate body of the spoke plate 13 will not be damaged, thereby ensuring the strength of the track roller 10 in the radial direction, improving the reliability of the track roller 10, and enabling it to have a longer service life.

[0039] Third, as Figure 11 and 12 shown, the outer rim of the outer rim 11 is connected to the outer rim of the inner rim 12 by the spoke plate 13, and the cross-section of the wheel body 10 is overall in a trapezoidal shape that is wider on the inner side and narrower on the outer side.

[0040] Furthermore, the spoke plate 13 is overall in a conical ring shape, and the spoke plate 13 is integrally formed by a ring-shaped conical section 131 and a transition section 132 that extend smoothly from the outer rim 11 to the inner rim 12. Specifically, the following two spoke plate 13 composition solutions are formed:

[0041] 1. As Figure 11 shown, the transition section 132 is an annular plate with an arc-shaped plate surface, and the center of curvature is located in the chamber formed by the two track roller half bodies 10a.

[0042] 2. As Figure 12 shown, the transition section 132 is an annular plate with a flat plate surface, and the plate surface of the annular plate is perpendicular to the axis direction of the wheel body 10. In this solution, the plate surface of the transition section 132 is perpendicular to the axis direction of the wheel body 10. Compared with the previous solution where the transition section 132 has an arc-shaped plate surface, when the track roller 10 is subjected to radial pressure, the spoke plate 13 is not easily deformed and has a more reliable support strength.

Claims

1. A track roller, characterized in that: The track roller (10) includes two track roller halves (10a), which are arranged in half in the axial direction. The track roller half (10a) includes a tubular outer rim (11) and an inner rim (12) coaxially sleeved, and a spoke plate (13) connecting the outer rim (11) and the inner rim (12). The outer rim (11), the spoke plate (13) and the inner rim (12) of the track roller half (10a) are integrally formed. The adjacent side axial end edges of the outer rims (11) of the two track roller halves (10a) are connected, and the adjacent side axial end edges of the inner rims (12) of the two track roller halves (10a) are connected.

2. The idler wheel according to claim 1, wherein: The two track roller halves (10a) are symmetrically arranged in half in the axial direction.

3. The track roller according to claim 1, wherein: The outer rim or inner rim of the outer rim (11) is connected to the outer rim of the inner rim (12) by a spoke plate (13).

4. The road wheel according to claim 1, characterized in that: The inner rim of the inner rim (12) extends radially inward along the wheel body (10) to form an annular bearing limit ring (121).

5. The carrier roller according to claim 4, wherein: The inner rims of the outer rims (11) of the two track roller halves (10a) are welded together, and the inner rims of the inner rims (12) of the two track roller halves (10a) are welded together.

6. The idler wheel according to claim 3, characterized in that: The inner rims of the outer rims (11) of the two track roller halves (10a) are welded together. Internal threads are provided on the inner pipe end sections of the inner rims (12), and the first connecting sleeve (20) is in threaded fit with the internal threads of the two inner rims (12).

7. The carrier roller according to claim 3, wherein: The inner rims of the outer rims (11) of the two track roller halves (10a) are welded together. A limit fit for restricting axial separation between each other is provided between the two inner rims (12). An annular clamping groove (122) is provided on the inner circumferential surface at the position of the inner rim of the inner rim (12). The annular clamping groove (122) is coaxially arranged with the inner rim (12), and a ring-shaped snap spring (30) is embedded in the cavity of the annular clamping groove (122). The inner ring edge of the snap spring (30) protrudes outside the annular clamping groove (122).

8. The road wheel according to claim 4 or 6 or 7, characterized in that: The inner rims of the outer rims (11) of the two track roller halves (10a) are welded together. External threads are provided on the inner pipe end sections of the inner rims (12), and the second connecting sleeve (40) is in threaded fit with the external threads of the two inner rims (12).

9. The road wheel according to claim 3, wherein: The inner rims of the outer rims (11) of the two track roller halves (10a) are welded together. The inner rims of the two inner rims (12) are arranged at intervals. External threads are provided on the inner pipe end sections of the inner rims (12), and the third connecting sleeve (50) is in threaded fit with the external threads of the two inner rims (12). A convex ring (51) is connected at the middle position of the inner circumferential surface of the third connecting sleeve (50). The convex ring (51) is coaxially arranged with the third connecting sleeve (50) and is integrally connected. The convex ring (51) protrudes into the pipe cavity of the inner rim (12) through the interval area between the two inner rims (12).

10. The carrier roller according to claim 3, characterized in that: The inner rim of the outer rim (11) is connected to the outer rim of the inner rim (12) by a spoke plate (13), and the overall cross-section of the track roller half (10a) is S-shaped.

11. The track roller according to claim 1, characterized in that: The inner rim of the outer rim (11) is connected to the inner rim of the inner rim (12) by a spoke plate (13). The two spoke plates (13) are arranged in contact with each other and are connected together by bolts.

12. The track roller according to claim 10 or 11, characterized in that: The outer rim of the outer rim (11) extends an arcuate rim consumption section (111) towards the side where the axis of the wheel body (10) is located.

13. The idler according to claim 1 or 3, characterized in that: The outer rim of the outer rim (11) is connected to the outer rim of the inner rim (12) by a spoke plate (13), and the cross-section of the wheel body (10) is overall trapezoidal with a wider inner side and a narrower outer side.

14. The idler according to claim 13, characterized in that: The spoke plate (13) is integrally conical-ring-shaped, and the spoke plate (13) is integrally formed by a ring-shaped conical section (131) and a transition section (132) extending from the outer rim (11) to the inner rim (12).

15. The idler wheel according to claim 14, wherein: The transition section (132) is an annular plate with an arcuate plate surface, and the center of curvature is located in the chamber formed by the two half idler wheels (10a).

16. The carrier roller according to claim 14, characterized in that: The transition section (132) is an annular plate with a flat plate surface, and the plate surface of the annular plate is perpendicular to the axis direction of the wheel body (10).

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