Thrust wheel

Abstract

The utility model 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 a half mode 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] This utility model relates to a tracked walking mechanism, specifically to a support roller. Background Technology

[0002] Track rollers are crucial components in tracked walking mechanisms, responsible for bearing the weight of the machine. They transfer the overall weight of the machine to the ground and support the track structure. To address the problems of heavy weight, low material utilization, and low production efficiency in cast track rollers, Chinese Patent Publication No. CN215706749U discloses a spin-formed track roller for tracked machines. This includes a spin-formed track roller body with a central cavity. A central bushing is fixedly mounted in the central part of the track roller body, and an encapsulation plate for sealing the central cavity is fitted onto the outer surface of the central bushing. A central shaft is rotatably mounted in the central part of the central bushing. Figure 1 As shown, the main body 1 of the support roller includes a hub body 11 and a support plate body 12 that are integrally connected to each other. The support plate body 12 and the central bushing 2 are sealed together. The encapsulation plate 3 is integrally connected to the central bushing 2 and the hub body 11 by welding, which can form a closed cavity in the central cavity 13.

[0003] While the above technical solution can prevent external mud, sand, water, and other impurities from entering the central cavity and reducing the service life of the support roller, the sealing plate, central bushing, and hub body in the support roller body all require effective sealing welding. The total number of welds is too large, which not only significantly increases the overall welding manufacturing cost, but also makes the welding work very heavy, affecting production efficiency. Secondly, the support roller and central bushing are processed separately and then assembled. On the one hand, this affects production efficiency, and on the other hand, the waste material of the central hole punched out before spinning the support roller cannot be effectively utilized, which also significantly increases production costs. Summary of the Invention

[0004] This utility model provides a support roller that, from the aspects of wheel body structure and welding workload, reduces the manufacturing cost and improves processing efficiency while meeting product usage requirements.

[0005] To achieve the above objectives, the technical solution adopted is as follows: a support roller, the support roller includes two support roller halves, the two support roller halves are arranged in half in the axial direction, the support roller halves include a tubular outer ring and an inner ring that are coaxially nested, and a spoke plate that connects the outer ring and the inner ring. The outer ring, spoke plate and inner ring of the support roller halves are integrally formed, the axial ends of the adjacent sides of the outer rings of the two support roller halves are connected, and the axial ends of the adjacent sides of the inner rings of the two support roller halves are connected.

[0006] Compared with the prior art, the technical effects of this utility model are as follows: the outer rim, spokes and inner rim of the support roller half are integrally formed. Compared with the traditional scheme of separate processing of support roller and axle sleeve, on the one hand, it reduces the number of overall welds, reduces the overall welding manufacturing cost and welding workload of support roller, and on the other hand, it makes full use of the waste material generated during the punching of the original support roller to form the inner rim, replacing the traditional separate axle sleeve, for bearings, axles and end caps to be placed inside, which greatly improves the material utilization rate. At the same time, the entire wheel body is formed in one piece, which effectively improves the overall processing efficiency of support roller. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of existing technology;

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

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

[0010] Figure 4 This is a schematic diagram showing the engagement of the snap ring and the second connecting sleeve.

[0011] Figure 5 for Figure 4 Enlarged view of part A in the image;

[0012] Figure 6 This is a schematic diagram showing the fit between the bearing retaining ring and the second connecting sleeve.

[0013] Figure 7 This is a schematic diagram showing the mating of the first connecting sleeve and the second connecting sleeve;

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

[0015] Figure 9 A schematic diagram of the first embodiment of the cross-sectional shape of the support roller half-body;

[0016] Figure 10 A schematic diagram of the second embodiment of the cross-sectional shape of the support roller half;

[0017] Figure 11 A schematic diagram of the third embodiment of the support roller half-body cross-sectional shape;

[0018] Figure 12 This is a schematic diagram of the fourth embodiment of the cross-sectional shape of the support roller half. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-12 The present invention will be further described in detail below, including related content:

[0020] A support roller, the support roller 10 includes two support roller halves 10a, the two support roller halves 10a are arranged in half in the axial direction, the support roller halves 10a include a tubular outer ring 11 and an inner ring 12 that are coaxially sleeved, and a spoke 13 that connects the outer ring 11 and the inner ring 12. The outer ring 11, the spoke 13 and the inner ring 12 of the support roller halves 10a are integrally formed, the axial ends of the adjacent sides of the outer rings 11 of the two support roller halves 10a are connected, and the axial ends of the adjacent sides of the inner rings 12 of the two support roller halves 10a are connected.

[0021] In the above technical solution, the support roller 10 is composed of two half-mounted support roller halves 10a. The outer wheel rim 11, the spoke plate 13 and the inner wheel rim 12 of the support roller halves 10a are integrally formed to form an integral support roller halves 10a. In addition to the traditional casting or forging process, the support roller halves 10a can also be formed by spinning or stamping. Compared with the traditional support roller 10 composed of a split wheel body and axle sleeve, it reduces the number of welds in the support roller 10. That is, it is only necessary to weld the axial ends of the outer wheel rim 11 and the inner wheel rim 12 of the two support roller halves 10a near each other, thereby reducing the overall welding workload and welding manufacturing cost of the support roller 10.

[0022] On the other hand, traditional split-type support rollers require the raw material sheet to be punched with a sufficiently large center hole for the subsequent axle sleeve to be inserted. However, the support roller 10 provided in this application eliminates the axle sleeve. First, a ring-shaped plate is punched out on the sheet material, and then the overall outline of the support roller half 10a is formed by spinning or stamping. During the punching of the raw material sheet, the punching area of ​​the center hole is greatly reduced. The waste material of the center hole that would have been punched out is directly formed into the inner ring by spinning or stamping, replacing the traditional split-type axle sleeve, which is used to house the bearing, axle, and end cap. This significantly improves the material utilization rate. At the same time, the entire wheel body is formed in one piece, which effectively improves the overall production efficiency of the support roller 10.

[0023] Furthermore, the support roller 10 provided in this application can be manufactured using only a stamping process, which can overcome the shortcomings of the spinning process, which has high material requirements (spinning generally requires hot-rolled steel plates such as SPHC, SPHD, and SPHE, which have high material quality requirements and are expensive; moreover, the hardness of such materials can only be improved through carburizing, nitriding, carbonitriding, etc., resulting in high heat treatment costs). In contrast, the support roller 10 provided in this application can be manufactured using ordinary Q235, 35#, and other steel plates, resulting in lower material costs. The surface hardness of the product can also be improved through medium- and high-frequency induction hardening, perfectly solving the limitation of induction hardening for spun products.

[0024] It should be noted that, for raw steel plates of a general size, from the perspective of material utilization, the outer diameter of the annular profiles formed by punching out the two heavy-duty wheel halves 10a can be slightly different. However, it is necessary to ensure that the radial dimensions of the two heavy-duty wheel halves 10a are consistent after the annular profiles are spun or punched to form the heavy-duty wheel halves 10a. This ensures that the axial ends of the outer rings 11 and the inner rings 12 of the two heavy-duty wheel halves 10a are aligned and welded. In this way, for the remaining plate portion on the raw steel plate that cannot be punched into a large size, a relatively small annular plate can be punched out, thereby improving the utilization rate of the raw steel plate.

[0025] As a preferred embodiment, the two heavy wheel halves 10a are symmetrically arranged in half along the axial direction, and the dimensions and contours of the two heavy wheel halves 10a are consistent.

[0026] As a preferred option, considering that the support roller half 10a is formed by spinning or stamping, the outer or inner rim of the outer rim 11 is connected to the outer rim of the inner rim 12 by the spokes 13, and the overall outline of the support roller half 10a can be formed by pressing.

[0027] This application takes into account the need to house bearings within the cavity formed by the inner ring 12 of the support roller 10 and to provide reliable axial restraint for the bearings. The following are several methods for restraining the bearings:

[0028] Firstly, such as Figure 2 As shown, the inner rim of the inner ring 12 extends inward along the radial direction of the support roller 10 to form an annular bearing retaining ring 121. In this design, the bearing is embedded in the cavity formed by the inner ring 12. The bearing retaining ring 121, formed by the protrusion of the inner rim of the inner ring 12, can limit the bearing, replacing the protrusion on the inner circumferential surface of the traditional split-type wheel and axle sleeve, thus meeting the positioning requirements of the bearing.

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

[0030] Secondly, such as Figure 3 As shown, the inner rims of the outer wheel rims 11 of the two heavy wheel halves 10a are welded together, and the inner tube end section of the inner wheel rim 12 is provided with internal threads. The first connecting sleeve 20 and the internal threads of the two inner wheel rims 12 form a threaded fit. In this scheme, the two inner wheel rims 12 are connected by the first connecting sleeve 20, which on the one hand restricts the relative displacement between the two inner wheel rims 12, and on the other hand, the first connecting sleeve 20 protrudes into the tube cavity of the inner wheel rim 12 to form a bearing limiting component.

[0031] Thirdly, such as Figure 4 and Figure 5 As shown, the inner rims of the outer rims 11 of the two heavy wheel halves 10a are welded together. A limiting fit is provided between the two inner rims 12 to restrict axial separation between them. An annular groove 122 is formed on the inner circumferential surface of the inner rim 12. The annular groove 122 is coaxially arranged with the inner rim 12, and a ring-shaped retaining spring 30 is embedded in the groove cavity of the annular groove 122. The inner edge of the retaining spring 30 protrudes outside the annular groove 122. In this design, the ring-shaped retaining spring 30 is engaged in the annular groove 122 on the inner circumferential surface of the inner rim 12, forming a bearing limiting component. The limiting fit between the two inner rims 12 ensures that they will not separate from each other.

[0032] Fourth, such as Figure 4 , 6 As shown in Figure 7, for the aforementioned three bearing limiting schemes, in order to ensure a stable connection between the two inner wheel rings 12, in addition to welding the two inner wheel rings 12 together, the inner rims of the outer wheel rings 11 of the two heavy wheel halves 10a can also be welded together. External threads are provided on the inner tube end section of the inner wheel ring 12, and the second connecting sleeve 40 forms a threaded engagement with the external threads of the two inner wheel rings 12. This scheme is not focused on how to form the bearing limiting component, but more importantly on how to connect and fix the two inner wheel rings 12. This scheme uses the second connecting sleeve 40 as a transitional connector, connecting the two inner wheel rings 12 together through a threaded engagement.

[0033] In the case of using the first connecting sleeve 20 to thread the inner wheel 12 and form a bearing limit, adding the second connecting sleeve 40 can further strengthen the structure.

[0034] Fifth, such as Figure 8 As shown, the inner rims of the outer rims 11 of the two heavy wheel halves 10a are welded together, and the inner rims of the two inner rims 12 are spaced apart. External threads are provided on the inner tube end section of the inner rim 12. The third connecting sleeve 50 and the external threads of the two inner rims 12 form a threaded fit. A convex ring 51 is connected at the center of the inner circumferential surface of the third connecting sleeve 50. The convex ring 51 and the third connecting sleeve 50 are coaxially arranged and integrally connected. The convex ring 51 protrudes through the gap between the two inner rims 12 into the cavity of the inner rim 12. In this design, the three connecting sleeves 50 and the inner rims 12 form a threaded fit to connect the two inner rims 12 together. Furthermore, the convex ring 51 integrally formed on the inner circumferential surface of the third connecting sleeve 50 constitutes a bearing limiting component. The convex ring 51 protrudes through the gap between the two inner rims 12 into the cavity of the inner rim 12, and the bearing can abut against the end face of the convex ring 51 to form a limiting position.

[0035] In addition, this application provides the following multiple options for the overall profile shape of the support roller half 10a:

[0036] Firstly, such as Figure 9 As shown, the inner rim of the outer rim 11 and the outer rim of the inner rim 12 are connected by the spokes 13, and the cross-section of the support roller half 10a is S-shaped.

[0037] Secondly, such as Figure 10 As shown, the inner rim of the outer rim 11 and the inner rim of the inner rim 12 are connected by spokes 13. The two spokes 13 are arranged close to each other and are connected together by bolts. In this design, the bolt connection between the two spokes 13 can also be omitted, and a welding connection can also be used.

[0038] For the two overall contour designs of the track roller half 10a mentioned above, the outer rim of the outer wheel rim 11 extends into an arc-shaped rim wear section 111 towards the side where the track roller 10 shaft core is located. In this design, during use, the rim wear section 111, which is exposed on the outer rim of the outer wheel rim 11, is adjacent to the protruding limiting part in the middle of the track. When the track deviates or the traveling mechanism turns, the rim wear section 111 abuts against the protruding limiting part in the middle of the track. Even if the rim wear section 111 wears after long-term use, it will not damage the body of the spoke 13, thereby ensuring the radial strength of the track roller 10, improving the reliability of the track roller 10, and giving it a longer service life.

[0039] Thirdly, such as Figure 11 and 12 As shown, the outer rim of the outer rim 11 is connected to the outer rim of the inner rim 12 by the spokes 13, and the cross-section of the support roller 10 is generally trapezoidal in shape, wider on the inside and narrower on the outside.

[0040] Furthermore, the spoke 13 is generally conical in shape, and the spoke 13 is integrally formed from the outer rim 11 to the inner rim 12 by a conical segment 131 and a transition segment 132. Specifically, the spoke 13 is configured in the following two ways:

[0041] 1. For example Figure 11 As shown, the transition section 132 is an annular plate with an arc-shaped surface and the center of curvature is located in the cavity formed by the two heavy wheel halves 10a.

[0042] 2. For example Figure 12 As shown, the transition section 132 is a flat annular plate with its surface perpendicular to the axis of the support roller 10. In this design, the surface of the transition section 132 is perpendicular to the axis of the support roller 10. Compared to the previous design where the transition section 132 is arc-shaped, the spokes 13 are less prone to deformation under radial pressure, resulting in more reliable support strength.

Claims

1. A support roller, characterized in that: The support roller (10) includes two support roller halves (10a), which are arranged in half in the axial direction. The support roller halves (10a) include a tubular outer ring (11) and an inner ring (12) that are coaxially fitted together, and a spoke (13) that connects the outer ring (11) and the inner ring (12). The outer ring (11), spoke (13) and inner ring (12) of the support roller halves (10a) are integrally formed. The outer rings (11) of the two support roller halves (10a) are connected at their adjacent axial ends, and the inner rings (12) of the two support roller halves (10a) are connected at their adjacent axial ends.

2. The support roller according to claim 1, characterized in that: The two heavy wheel halves (10a) are arranged symmetrically in the axial direction.

3. The support roller according to claim 1, characterized in that: The outer or inner rim of the outer rim (11) is connected to the outer rim of the inner rim (12) by spokes (13).

4. The support roller according to claim 1, characterized in that: The inner rim of the inner rim (12) extends inward along the radial direction of the support roller (10) to form an annular bearing retaining ring (121).

5. The support roller according to claim 4, characterized in that: The inner rims of the outer rims (11) of the two heavy wheel halves (10a) are welded together, and the inner rims of the inner rims (12) of the two heavy wheel halves (10a) are welded together.

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

7. The support roller according to claim 3, characterized in that: The inner rims of the outer rims (11) of the two heavy wheel halves (10a) are welded together. A limiting fit is provided between the two inner rims (12) to restrict their axial separation. An annular groove (122) is provided on the inner circumferential surface at the inner rim position of the inner rim (12). The annular groove (122) is co-centered with the inner rim (12) and a ring-shaped retaining spring (30) is embedded in the groove cavity of the annular groove (122). The inner edge of the retaining spring (30) protrudes out of the annular groove (122).

8. The support roller according to claim 4, 6, or 7, characterized in that: The inner rims of the outer wheel rings (11) of the two heavy wheel halves (10a) are welded together, and the inner tube end section of the inner wheel ring (12) is provided with external threads. The second connecting sleeve (40) and the external threads of the two inner wheel rings (12) form a threaded fit.

9. The support roller according to claim 3, characterized in that: The inner rims of the outer rims (11) of the two heavy wheel halves (10a) are welded together, and the inner rims of the two inner rims (12) are arranged at intervals. The inner tube end section of the inner rim (12) is provided with external threads. The third connecting sleeve (50) and the external threads of the two inner rims (12) form a threaded fit. A convex ring (51) is connected at the middle position of the inner circumference of the third connecting sleeve (50). The convex ring (51) and the third connecting sleeve (50) are arranged coaxially and connected as one. The convex ring (51) protrudes into the tube cavity of the inner rim (12) through the interval area between the two inner rims (12).

10. The support 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 (13), and the cross section of the support wheel half (10a) is S-shaped.

11. The support roller according to claim 1, characterized in that: The inner rim of the outer rim (11) and the inner rim of the inner rim (12) are connected by spokes (13), and the two spokes (13) are arranged close to each other and connected together by bolts.

12. The support roller according to claim 10 or 11, characterized in that: The outer rim of the outer rim (11) extends into an arc-shaped rim consumption section (111) towards the side where the support wheel (10) axle is located.

13. The support roller 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 spokes (13), and the cross section of the support roller (10) is a trapezoidal shape that is wider on the inside and narrower on the outside.

14. The support roller according to claim 13, characterized in that: The spoke (13) is generally conical and annular. The spoke (13) is formed by an annular conical section (131) and a transition section (132) extending sequentially from the outer ring (11) to the inner ring (12).

15. The support roller according to claim 14, characterized in that: The transition section (132) is an annular plate with an arc-shaped surface and the center of curvature is located in the cavity formed by the two heavy wheel halves (10a).

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

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