High-load high-friction polyurethane rubber coated wheel
Through the segmented rubber-encapsulated wheel and chamfered structure, the problems of low load capacity and stress concentration of rubber-encapsulated wheels are solved, and the effects of high load and high friction are achieved, which improves the propulsion stability of the shield machine and the durability of the wheel hub.
Patent Information
- Application Number
- CN202422868031.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-11-22
AI Technical Summary
The load capacity of the existing rubber-encapsulated wheels is low, which leads to easy slippage during the propulsion of the shield machine, and the wheel hub is prone to stress concentration during operation, affecting durability and assembly performance.
The adhesive layer with a segmented design is adopted. The two ends of the adhesive ring are arranged in chamfered, and a first deformation groove is formed between adjacent adhesive rings. The edges of the ends of the wheel hub are also arranged in chamfered, and the second deformation groove and convex groove structure are added to improve the deformation space and friction and reduce stress concentration.
It improves the load capacity and friction of the rubber-encapsulated wheel, reduces the risk of slippage, enhances the durability and assembly performance of the wheel hub, and ensures the stable propulsion of the shield machine.
Smart Images
Figure CN223237298U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of rubber-coated wheels, and in particular to a high-load and high-friction polyurethane rubber-coated wheel. Background Art
[0002] A shield machine (TBM) is a tunnel boring machine (TBM) that uses the shield method. The TBM constructs (or lays) the tunnel's "shield" (supporting segments) while excavating. A TBM used for excavating single-hole, single-track subway tunnels tows five or six subsequent trolleys, each housing power, hydraulics, steering, and control systems. Towbars connect the shield and subsequent trolleys. Rubber-coated wheels are installed on the bottom of the trolleys to support the weight of the TBM and its equipment, propelling it forward through the tunnel.
[0003] Currently, existing rubber-coated wheels are constructed by directly coating the hub surface with a layer of polyurethane to form a rubber coating. After vulcanization, the coating is tightly bonded to the hub outer ring, completing the rubber-coated wheel. During use, the rubber-coated wheel is squeezed as it propels forward. Due to the limited width of the polyurethane, the deformation it can produce is small, resulting in a relatively low load capacity. Therefore, further improvements are needed. Utility Model Content
[0004] In order to improve the load capacity of the rubber-coated wheel, the present application provides a high-load and high-friction polyurethane rubber-coated wheel.
[0005] This application provides a high-load, high-friction polyurethane rubber-coated wheel, which adopts the following technical solutions:
[0006] A high-load, high-friction polyurethane rubber-coated wheel comprises a hub, a rubber coating arranged outside the hub, and a rubber layer for fixing the rubber coating to the hub. The rubber coating comprises a plurality of rubber coating rings spaced apart along the axis of the hub. The edges of the rubber coating rings at both ends are chamfered, and the chamfer between two adjacent rubber coating rings forms a first deformation groove.
[0007] By adopting the above technical solution, the rubber coating includes several rubber coating rings spaced apart along the axis of the hub, so as to perform segmented press-fitting of the rubber coating layer, thereby improving the load capacity of the rubber-coated wheel itself. The edges of the rubber coating rings are chamfered at both ends, so that a first deformation groove is formed between two adjacent rubber coating rings, so that when squeezed, they can deform toward the first deformation groove to provide deformation space, thereby further improving the load capacity of the rubber-coated wheel. The internal heat generated during the extrusion process is also easily released in the first deformation groove. Since the first deformation groove can increase the roughness of the outer surface of the rubber coating, the friction of the rubber-coated wheel is further increased, thereby reducing the possibility of slipping during the forward propulsion process and improving the stability of the shield machine.
[0008] Preferably, the edge of the hub at the end is chamfered.
[0009] By adopting the above technical solution, the edge of the wheel hub at the end is chamfered. On the one hand, it can reduce stress concentration. Since the wheel hub is subjected to various forces during operation, such as radial force, axial force and tangential force, these forces are likely to cause stress concentration at the edge of the wheel hub, leading to fatigue and damage to the wheel hub. The chamfered setting can disperse these stresses and reduce the degree of stress concentration, thereby improving strength and durability. On the other hand, it can improve assembly performance. Since the wheel hub needs to be assembled with the tire, during the assembly process, if the edge of the wheel hub is too sharp, it may damage these components or cause assembly difficulties. The chamfered setting can make the edge of the wheel hub smoother, which is conducive to smooth assembly with other components and reduces friction and damage during the assembly process.
[0010] Preferably, the first deformation groove is arranged in a wave shape around the axis of the hub.
[0011] By adopting the above technical solution, the deformation space of the first deformation groove can be further increased, and a certain deformation can be provided for stress in non-passing directions, thereby improving the load capacity of the rubber-coated wheel and further improving its friction.
[0012] Preferably, the outer peripheral wall of the rubber-coated ring is provided with a plurality of second deformation grooves.
[0013] By adopting the above technical solution, although multiple sections of rubber-coated rings are provided with deformation space through the first deformation grooves, since the rubber-coated rings also require a certain width to achieve the required strength, the number that can be set is limited. Therefore, several second deformation grooves are provided to further increase the spatial deformation amount of the rubber-coated rings.
[0014] Preferably, a plurality of the second deformation grooves are arranged at intervals along the radial direction of the rubber-coated ring, and the diameters of the plurality of the second deformation grooves gradually decrease from the middle toward the two ends of the rubber-coated ring.
[0015] By adopting the above technical solution, several second deformation grooves are arranged at intervals along the radial direction of the rubber-coated ring, and the diameters of the several second deformation grooves are gradually reduced from the middle to the two ends, providing relatively more deformation space for the part of the rubber-coated ring away from the first deformation groove.
[0016] Preferably, a plurality of the second deformation grooves are spaced apart along the axis of the rubber-coated ring, and the length direction of the rubber-coated ring is inclined to the axis of the rubber-coated ring.
[0017] By adopting the above technical solution, the length direction of the second deformation groove is inclined to the axis of the rubber-coated ring to provide the required deformation space for the stress in the direction perpendicular to the second deformation groove, and to improve the friction between the tire and the tire during installation, that is, the connection strength between the two.
[0018] Preferably, the length directions of the second deformation grooves provided on two adjacent rubber-coated rings are intersecting.
[0019] By adopting the above technical solution, the length directions of the second deformation grooves provided on two adjacent rubber-coated wheels are arranged to intersect, thereby providing deformation spaces in different directions.
[0020] Preferably, the cross-section of the plurality of second deformation grooves along the axis is arranged in a wave shape.
[0021] By adopting the above technical solution, the edge transition of the second deformation groove is made smoother, which can reduce the stress concentration caused by sharp edges.
[0022] Preferably, the outer peripheral wall of the hub is provided with a convex strip, the inner peripheral wall of the rubber-coated ring is provided with a groove for the convex strip to be embedded in, and the rubber layer extends into the groove.
[0023] By adopting the above technical solution, the second deformation groove is provided, which can improve the friction of the rubber-coated wheel. However, during use, the rubber layer may fall off. In this regard, bumps and grooves are provided to increase the connection strength between the wheel hub and the rubber-coated ring, thereby reducing the possibility of the rubber layer falling off.
[0024] Preferably, the length direction of the convex strip is inclined to the length direction of the second deformation groove.
[0025] By adopting the above technical solution, the second deformation groove is inclined in the longitudinal direction, which can provide directional stress when the second deformation groove is compressed in the longitudinal direction, thereby improving the load capacity of the rubber-coated wheel.
[0026] In summary, the present invention has the following beneficial effects:
[0027] 1. The rubber coating includes several rubber rings spaced apart along the axis of the hub, which are press-fitted in sections to improve the load capacity of the rubber-coated wheel. The edges of the rubber rings are chamfered at both ends, forming a first deformation groove between two adjacent rubber rings. When squeezed, the rings deform toward the first deformation groove, providing deformation space, thereby further improving the load capacity of the rubber-coated wheel. The roughness of the outer surface of the rubber coating can also be increased to further increase the friction of the rubber-coated wheel, reduce the possibility of slipping during forward propulsion, and improve the stability of the shield machine.
[0028] 2. Chamfering the edge of the wheel hub at the end can, on the one hand, reduce stress concentration. Since the wheel hub is subjected to various forces during operation, such as radial force, axial force, and tangential force, these forces can easily cause stress concentration at the edge of the wheel hub, leading to fatigue and damage to the wheel hub. Chamfering can disperse these stresses and reduce the degree of stress concentration, thereby improving strength and durability. On the other hand, it can improve assembly performance, as the wheel hub needs to be assembled with the tire. During the assembly process, if the edge of the wheel hub is too sharp, it may damage these components or cause assembly difficulties. Chamfering can make the edge of the wheel hub smoother, which is conducive to smooth assembly with other components and reduces friction and damage during the assembly process.
[0029] 3. By providing a plurality of second deformation grooves, the spatial deformation of the rubber-coated ring is further increased. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 is a schematic cross-sectional structural diagram of Example 1 of the present application;
[0031] Figure 2 yes Figure 1 A partial enlarged schematic diagram of part A;
[0032] Figure 3 This is a schematic structural diagram of the first deformation groove in Example 1 of the present application, which is arranged in a wave-like manner;
[0033] Figure 4 This is a schematic diagram of the structure of Example 2 of the present application;
[0034] Figure 5 yes Figure 4 A partial enlarged schematic diagram of part B;
[0035] Figure 6 This is a schematic structural diagram of the convex strips and grooves in Example 2 of the present application;
[0036] Figure 7 It is a structural diagram of Example 3 of the present application.
[0037] Explanation of the accompanying reference numerals: 1. Hub; 11. Inner ring; 12. Support member; 13. Outer ring; 14. Reinforcement part; 2. Rubber coating layer; 21. Rubber coating ring; 22. First deformation groove; 3. Rubber layer; 4. Second deformation groove; 5. Raised strip; 6. Groove. DETAILED DESCRIPTION
[0038] The following is combined with Figure 1-7 , further details of this application are given.
[0039] The embodiments of the present application disclose a high-load and high-friction polyurethane rubber-coated wheel.
[0040] Example 1:
[0041] A high load and high friction polyurethane rubber wheel, refer to Figure 1 , comprising a hub 1, a rubber coating 2 disposed outside the hub 1, and a rubber layer 3 for fixing the rubber coating 2 to the hub 1. In this embodiment, the rubber coating 2 is made of polyurethane.
[0042] Reference Figure 1 、 Figure 2 The hub 1 comprises, from the inside out, an inner ring 11, a support member 12 mounted on the inner ring 11, and an outer ring 13 coaxially sleeved on the inner ring 11. In this embodiment, two inner rings 11 and two support members 12 are provided, symmetrically along the radial direction of the outer ring 13. The two inner rings 11 protrude toward the ends of the outer ring 13. It should be noted that the support member 12 comprises a plurality of support columns spaced apart around the axis of the inner ring 11. The ends of the support columns are fixedly connected to the outer circumferential wall of the inner ring 11 and the inner circumferential wall of the outer ring 13, respectively. The adjacent surfaces of the two support columns are flush with the adjacent surfaces of the two inner rings 11. In this embodiment, the thickness of the support columns gradually decreases toward the outer ring 13, and a reinforcement portion 14 is provided at the end of the support column near the outer ring 13. The reinforcement portion 14 can be a reinforcement point, the same width as the support column, or an annular portion around the axis of the inner ring 11, depending on the specific requirements.
[0043] The chamfered edge of the outer ring 13 at the end reduces stress concentration, thereby improving strength and durability. It also improves assembly performance, making the edge of the hub 1 smoother, facilitating smooth assembly with other components while reducing friction and damage during assembly.
[0044] Among them, the rubber layer 2 includes a plurality of rubber rings 21 spaced apart along the axis of the hub 1. The specific number is set according to demand. In this embodiment, three rubber rings 21 are specifically shown. The edges of the rubber rings 21 at both ends are chamfered. The chamfer between two adjacent rubber rings 21 forms a first deformation groove 22. It should be noted that the first deformation groove 22 can be annularly arranged parallel to the end face of the outer ring 13, or can be wavy around the axis of the hub 1. Figure 3 As shown, set it according to your needs.
[0045] The implementation principle of a high-load, high-friction polyurethane rubber-coated wheel in the embodiment of the present application is as follows: the rubber layer 2 includes a plurality of rubber rings 21 spaced apart along the axis of the hub 1, so as to perform segmented press-fitting on the rubber layer 2 to improve the load capacity of the rubber-coated wheel itself, wherein the edges of the rubber rings 21 at both ends are chamfered so that a first deformation groove 22 is formed between two adjacent rubber rings 21, so that when squeezed, the rubber rings 21 can deform toward the first deformation groove 22 to provide deformation space, thereby further improving the load capacity of the rubber-coated wheel. The internal heat generated during the extrusion process is also easily released in the first deformation groove 22. Since the first deformation groove 22 is set, the roughness of the outer surface of the rubber layer 2 can be increased, thereby further improving the friction of the rubber-coated wheel, reducing the possibility of slipping during the forward propulsion process, and improving the stability of the shield machine.
[0046] Example 2:
[0047] Reference Figure 4 、 Figure 5 The difference from Example 1 is that a plurality of second deformation grooves 4 are provided on the outer peripheral wall of the rubber-coated ring 21, and the plurality of second deformation grooves 4 are arranged at intervals along the radial direction of the rubber-coated ring 21. The diameters of the plurality of second deformation grooves 4 gradually decrease from the middle toward the two ends of the rubber-coated ring 21, and the cross-sections of the plurality of second deformation grooves 4 along the axis are arranged in a wavy shape.
[0048] Reference Figure 6 Furthermore, a ridge 5 is protruded from the outer peripheral wall of the outer ring 13, and a groove 6 is provided on the inner peripheral wall of the rubber-coated ring 21 for the ridge 5 to be embedded in. The rubber layer 3 extends into the groove 6. In this embodiment, the length direction of the ridge 5 can be inclined to or perpendicular to the length direction of the second deformation groove 4, depending on the specific needs. In this embodiment, it is specifically shown as being perpendicular to the length direction of the second deformation groove 4, that is, the length direction of the ridge 5 is parallel to the axis of the outer ring 13.
[0049] Example 3:
[0050] Reference Figure 7 The difference from Example 2 is that several second deformation grooves 4 are arranged at intervals along the axis of the rubber-coated ring 21, the length direction of the rubber-coated ring 21 is inclined to the axis of the rubber-coated ring 21, and the length directions of the second deformation grooves 4 opened on two adjacent rubber-coated rings 21 are intersecting.
[0051] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. A high-load and high-friction polyurethane rubber-coated wheel, characterized by: The invention comprises a wheel hub (1), a rubber coating layer (2) arranged outside the wheel hub (1), and a rubber layer (3) for fixing the rubber coating layer (2) to the wheel hub (1), wherein the rubber coating layer (2) comprises a plurality of rubber coating rings (21) arranged at intervals along the axis of the wheel hub (1), wherein the edges of the rubber coating rings (21) at both ends are chamfered, and the chamfer between two adjacent rubber coating rings (21) forms a first deformation groove (22).
2. The high-load and high-friction polyurethane rubber-coated wheel according to claim 1, characterized in that: The edge of the hub (1) at the end is chamfered.
3. The high-load and high-friction polyurethane rubber-coated wheel according to claim 1, characterized in that: The first deformation groove (22) is arranged in a wave shape around the axis of the hub (1).
4. The high-load and high-friction polyurethane rubber-coated wheel according to claim 1, characterized in that: A plurality of second deformation grooves (4) are provided on the outer peripheral wall of the rubber-coated ring (21).
5. The high-load and high-friction polyurethane rubber-coated wheel according to claim 4, characterized in that: A plurality of the second deformation grooves (4) are arranged at intervals along the radial direction of the rubber-coated ring (21), and the diameters of the plurality of the second deformation grooves (4) gradually decrease from the middle toward the two ends of the rubber-coated ring (21).
6. The high-load and high-friction polyurethane rubber-coated wheel according to claim 5, characterized in that: A plurality of the second deformation grooves (4) are arranged at intervals along the axis of the rubber-coated ring (21), and the length direction of the rubber-coated ring (21) is inclined to the axis of the rubber-coated ring (21).
7. The high-load and high-friction polyurethane rubber-coated wheel according to claim 6, characterized in that: The length directions of the second deformation grooves (4) provided on two adjacent rubber-coated rings (21) are arranged to intersect.
8. The high-load and high-friction polyurethane rubber-coated wheel according to claim 4, characterized in that: The cross-section of the plurality of second deformation grooves (4) along the axis is arranged in a wave shape.
9. The high-load and high-friction polyurethane rubber-coated wheel according to claim 4, characterized in that: The outer peripheral wall of the wheel hub (1) is provided with a convex strip (5), the inner peripheral wall of the rubber-coated ring (21) is provided with a groove (6) for the convex strip (5) to be embedded, and the rubber layer (3) extends into the groove (6).
10. The high-load and high-friction polyurethane rubber-coated wheel according to claim 9, characterized in that: The length direction of the convex strip (5) is inclined to the length direction of the second deformation groove (4).