High load bearing walking wheel

Abstract

The utility model provides a kind of high load type walking wheel, including center shaft, the center shaft passes through the main wheel body, bearing is arranged between the center shaft and the main wheel body, at least one rubber wheel is provided on the main wheel body, the outer circumferential surface of the main wheel body and the inner circumferential surface of the rubber wheel are realized by the tooth profile cooperation the one-way movement of the rubber wheel from the main wheel body one end face along axial direction;The limiting mechanism that the maximum position of the axial movement of the rubber wheel is limited is provided on the main wheel body.The utility model is connected using the mode of tooth profile cooperation between main wheel body and the rubber wheel, and the structure of tooth profile cooperation is convenient to press into rubber wheel and is not easy to fall off in working process.Setting oil seal on bearing cover, can effectively guarantee that lubricating grease is not contaminated, ensure that sewage, dust and sundries do not enter the center shaft, to increase high load type walking wheel reliability, prolong the service life of walking wheel.

Description

Technical Field

[0001] This utility model belongs to the field of load-bearing wheels, specifically relating to a high load-bearing traveling wheel. Background Technology

[0002] Currently, most heavy-duty traveling wheels consist of a central shaft, with a wheel assembly mounted on the shaft via bearings. Each wheel assembly comprises two symmetrically arranged steel wheels, as illustrated in patent CN214084505U, which describes a heavy-duty wheel structure for a deep tillage, pulverizing, and loosening machine's traveling mechanism. Furthermore, existing heavy-duty traveling wheels often use sliding bearings made of copper bushings, with polyurethane adhesive completely wrapped around the two steel wheels. However, this polyurethane coating process is prone to delamination under heavy pressure after water immersion, leading to deformation and failure. Replacing these wheels is laborious and time-consuming for equipment traveling within tunnels. Additionally, in areas with high levels of sewage and dust during shield tunneling, the copper bushings have a short lifespan and wear quickly damage the shaft and the base material, resulting in the shaft and base material remaining unusable even after replacement. Repair costs for the shaft and base material are prohibitively high. Moreover, the bushings experience increased resistance after a period of use in a sewage environment, further increasing wear. Summary of the Invention

[0003] This utility model provides a high-load-bearing walking wheel with a stable rubber wheel that is not easily detached.

[0004] The purpose of this utility model is achieved in the following manner: a high-load-bearing walking wheel includes a central shaft passing through the main wheel body, a bearing being provided between the central shaft and the main wheel body, at least one rubber wheel being provided on the main wheel body, and the outer circumferential surface of the main wheel body and the inner circumferential surface of the rubber wheel being connected by a toothed fit to enable the rubber wheel to move unidirectionally along the axial direction from one end face of the main wheel body; a limiting mechanism is provided on the main wheel body to limit the maximum position of the axial movement of the rubber wheel.

[0005] The inner circumferential surface of the rubber wheel is provided with at least one unidirectional ratchet along the axial direction, and the outer surface of the main wheel body corresponding to the position of the rubber wheel is provided with at least one ratchet groove corresponding to the unidirectional ratchet; or the inner circumferential surface of the rubber wheel is provided with at least one ratchet groove along the axial direction, and the outer surface of the main wheel body corresponding to the position of the rubber wheel is provided with at least one unidirectional ratchet corresponding to the ratchet groove.

[0006] Each of the unidirectional ratchet teeth and each of the ratchet grooves may be provided on the entire circumferential surface or at intervals on the circumferential surface.

[0007] Two rubber wheels are provided on the main wheel body, and each rubber wheel is connected to the corresponding position of the main wheel body through its own toothed engagement; the two rubber wheels achieve unidirectional movement in opposite directions through the toothed engagement; the limiting mechanism is a shoulder provided on the outer circumference of the main wheel body.

[0008] Two bearings are provided on the central shaft, and a bearing cover is provided on the central shaft near the outer end face of each bearing. The bearing cover axially limits the outer ring of the bearing on the corresponding side. Each bearing cover is fixedly connected to one side of the main wheel body. An oil seal is provided between the two bearing covers and the central shaft.

[0009] A limiting groove is provided on the outer end face of the rubber wheel. The diameter of the limiting groove is larger than the diameter of the main wheel body. The upper end of the bearing cover is disposed in the limiting groove, and the bearing cover axially limits the rubber wheel.

[0010] The bearing is a spherical sliding bearing, including a convex ball as the inner ring and a concave ball seat as the outer ring. An annular protrusion is provided in the middle of the inner surface of the main wheel body to axially position the two bearings.

[0011] Compared to existing technologies, this invention uses a toothed connection between the main wheel body and the rubber wheel. This toothed connection facilitates the pressing of the rubber wheel for installation and prevents it from easily falling off during operation. An oil seal is installed on the bearing cap to effectively prevent contamination of the lubricating grease and to prevent sewage, dust, and other debris from entering the central shaft, thereby increasing the reliability of the high-load-bearing traveling wheel and extending its service life. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Among them, 1 is the main wheel body, 2 is the rubber wheel, 3 is the central shaft, 4 is the bearing cover, 5 is the convex ball, 6 is the concave ball seat, and 7 is the oil seal. Detailed Implementation

[0014] In this utility model, unless otherwise expressly specified and limited, the technical terms used in this application shall have the ordinary meaning understood by those skilled in the art. Terms such as "connected," "linked," "fixed," and "set" shall be interpreted broadly, referring to fixed connections, detachable connections, or integral connections; direct connections or indirect connections via an intermediate medium; mechanical connections or electrical connections. Unless otherwise expressly specified and limited, "above" or "below" a second feature may mean that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," or "over" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "under" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Relational terms such as "first," "second," etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms used in the description, such as “center,” “lateral,” “longitudinal,” “length,” “width,” “thickness,” “height,” “front,” “rear,” “left,” “right,” “up,” “down,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “axial,” “radial,” “circumferential,” “clockwise,” and “counterclockwise,” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0015] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Figure 1 As shown, a high-load-bearing traveling wheel includes a central shaft 3 passing through a main wheel body 1. A bearing is provided between the central shaft 3 and the main wheel body 1. At least one rubber wheel 2 is detachably mounted on the main wheel body 1. The outer circumferential surface of the main wheel body 1 and the inner circumferential surface of the rubber wheel 2 are connected by a toothed fit, allowing the rubber wheel 2 to move unidirectionally along the axial direction from one end face of the main wheel body 1. A limiting mechanism is provided on the main wheel body 1 to restrict the maximum axial movement of the rubber wheel 2. In this invention, the main wheel body 1 and the rubber wheel 2 are connected by a toothed fit. The toothed fit structure facilitates the pressing of the rubber wheel 2 for installation and prevents it from easily falling off during operation. In the toothed fit, the teeth can be distributed throughout the entire circumference or only segments of annular teeth evenly distributed on the circumferential surface.

[0016] Furthermore, the inner circumferential surface of the rubber wheel 2 is provided with at least one unidirectional ratchet along the axial direction, and the outer surface of the main wheel body 1 corresponding to the position of the rubber wheel 2 is provided with at least one ratchet groove corresponding to the unidirectional ratchet; or the inner circumferential surface of the rubber wheel 2 is provided with at least one ratchet groove along the axial direction, and the outer surface of the main wheel body 1 corresponding to the position of the rubber wheel 2 is provided with at least one unidirectional ratchet corresponding to the ratchet groove. The material of the rubber wheel 2 has a certain elastic deformation. When the rubber wheel 2 is pushed, the ratchet on the rubber wheel 2 moves along the axial direction of the main wheel body 1 until a predetermined position is reached through deformation. The shape of the unidirectional ratchet can be determined as needed and does not necessarily have to be a standard ratchet shape. As long as it can satisfy the requirement that the rubber wheel 2 can move in one direction relative to the main wheel body 1 after being subjected to axial force, and cannot move in the opposite direction after being subjected to force in the other direction. Preferably, a row of unidirectional ratchets is provided along the axial direction, and the position between adjacent ratchets is the ratchet groove. Preferably, the height of the ratchet on the inner surface of the rubber wheel 2 does not exceed the inner surface of the rubber wheel 2, or is flush with the inner surface of the rubber wheel 2.

[0017] Specifically: each of the unidirectional ratchet teeth and each of the ratchet grooves can be provided on the entire circumferential surface or at intervals on the circumferential surface.

[0018] Furthermore, two rubber wheels 2 are provided on the main wheel body 1, each rubber wheel 2 being connected to a corresponding position on the main wheel body 1 through its own toothed engagement; the toothed engagement of the two rubber wheels 2 achieves unidirectional movement in opposite directions; the limiting mechanism is a shoulder provided on the outer circumference of the main wheel body 1. The teeth on the main wheel body 1 are set from both ends of the main wheel body 1 for easy installation. The shoulder here can be a whole ring or multiple circumferentially distributed protrusions. The two rubber wheels 2 can each use different shoulders, or different end faces of the same shoulder can be used as limiting mechanisms.

[0019] Specifically, two bearings are mounted on the central shaft 3. Bearing caps 4 are respectively mounted on the central shaft 3 near the outer end face of each bearing. The bearing caps 4 axially limit the outer ring of the corresponding bearing. Each bearing cap 4 is fixedly connected to one side of the main wheel body 1. Oil seals 7 are respectively installed between the two bearing caps 4 and the central shaft 3. The bearing caps 4 and the end faces of the main wheel body 1 can be connected by screws or other means, allowing the bearing caps 4 and the main wheel body 1 to rotate together. The oil seal 7 here can be a skeleton oil seal 7. The oil seals 7 on the bearing caps 4 effectively prevent the lubricating grease from being contaminated and prevent sewage, dust, and debris from entering the central shaft 3, thereby increasing the reliability of the high-load-bearing traveling wheel and extending its service life. The traveling wheel of this invention exhibits more stable and reliable performance when used in sewage and dust environments.

[0020] Furthermore, a limiting groove is provided on the outer end face of the rubber wheel 2. The diameter of the limiting groove is larger than the diameter of the main wheel body 1. The upper end of the bearing cover 4 is disposed in the limiting groove, and the bearing cover 4 axially limits the rubber wheel 2. In fact, the one-way toothed meshing structure, such as the meshing of a single row of ratchet teeth and a ratchet groove, can restrict the movement of the rubber wheel 2 toward the end face of the main wheel body 1, making it difficult for the rubber wheel 2 to disengage. The bearing cover 4 of this invention serves as a further safety measure, preventing the rubber wheel 2 from becoming loose due to excessive force or wear of the ratchet structure. The structure of the bearing cover 4 also reduces the force on the ratchet structure and reduces its wear.

[0021] Furthermore, the bearing is a spherical sliding bearing, including a convex ball 5 as the inner ring and a concave ball seat 6 as the outer ring. An annular protrusion is provided in the middle of the inner surface of the main wheel body 1 to axially position the two bearings. Alternatively, a protrusion can be provided on the central shaft 3 to axially position the two bearings on the side away from the bearing cover 4. In the spherical sliding bearing, the base surfaces of the inner and outer rings are spherical, and the specific curvature is set as needed. The lubrication structure of the spherical sliding bearing adopts existing technology and will not be described in detail. Compared with existing cylindrical bushings, the spherical sliding bearing of this application increases the contact surface, resulting in a larger force-bearing area and better performance. It has strong load-bearing capacity at low speeds and is impact-resistant. In terms of load-bearing capacity, during wheel operation, because the wheel travels within the circular tube, the center of gravity is off-center, and the force-bearing point of the cylindrical bushing is not symmetrical. The spherical contact surface effectively guides the two center of gravity points of the central shaft 3, overcoming the force imbalance caused by the gap between the shaft and the bearing sleeve, and helping to extend the service life of the shaft.

[0022] In practice: Fit the rubber wheel 2 with the corresponding diameter curved surface according to the tunnel diameter, press the rubber wheel 2 into the main wheel body 1 from the end face, and fix the bearing cover 4. If the rubber wheel 2 is worn or a different diameter rubber wheel 2 is needed, and thus needs to be replaced, remove the bearing cover 4 and use a special tool to remove the rubber wheel 2. Because the rubber wheel 2 is a low-cost consumable, it does not need to be completely and undamagedly disassembled.

[0023] The technical features of the embodiments described above can be combined in any way, and as long as there is no contradiction in the combination of these technical features, they should all be considered within the scope of this specification. Without departing from the overall concept of this utility model, any equivalent substitutions or modifications made to the technical solution of this utility model, as well as any changes and improvements, should also be considered within the protection scope of this utility model.

Claims

1. A high-load-bearing traveling wheel, comprising a central axle passing through a main wheel body, wherein a bearing is disposed between the central axle and the main wheel body, characterized in that: At least one rubber wheel is provided on the main wheel body. The outer circumferential surface of the main wheel body and the inner circumferential surface of the rubber wheel are connected by a toothed fit to enable the rubber wheel to move unidirectionally along the axial direction from one end face of the main wheel body. A limiting mechanism is provided on the main wheel body to limit the maximum position of the axial movement of the rubber wheel.

2. The high-load-bearing traveling wheel according to claim 1, characterized in that: The inner circumferential surface of the rubber wheel is provided with at least one unidirectional ratchet along the axial direction, and the outer surface of the main wheel body corresponding to the position of the rubber wheel is provided with at least one ratchet groove corresponding to the unidirectional ratchet; or the inner circumferential surface of the rubber wheel is provided with at least one ratchet groove along the axial direction, and the outer surface of the main wheel body corresponding to the position of the rubber wheel is provided with at least one unidirectional ratchet corresponding to the ratchet groove.

3. The high-load-bearing traveling wheel according to claim 2, characterized in that: Each of the unidirectional ratchet teeth and each of the ratchet grooves may be provided on the entire circumferential surface or at intervals on the circumferential surface.

4. The high-load-bearing traveling wheel according to claim 1, characterized in that: Two rubber wheels are provided on the main wheel body, and each rubber wheel is connected to the corresponding position of the main wheel body through its own toothed engagement; the two rubber wheels achieve unidirectional movement in opposite directions through the toothed engagement; the limiting mechanism is a shoulder provided on the outer circumference of the main wheel body.

5. The high-load-bearing traveling wheel according to claim 4, characterized in that: Two bearings are provided on the central shaft, and a bearing cover is provided on the central shaft near the outer end face of each bearing. The bearing cover axially limits the outer ring of the bearing on the corresponding side. Each bearing cover is fixedly connected to one side of the main wheel body. An oil seal is provided between the two bearing covers and the central shaft.

6. The high-load-bearing traveling wheel according to claim 5, characterized in that: A limiting groove is provided on the outer end face of the rubber wheel. The diameter of the limiting groove is larger than the diameter of the main wheel body. The upper end of the bearing cover is disposed in the limiting groove, and the bearing cover axially limits the rubber wheel.

7. The high-load-bearing traveling wheel according to claim 5, characterized in that: The bearing is a spherical sliding bearing, including a convex ball as the inner ring and a concave ball seat as the outer ring. An annular protrusion is provided in the middle of the inner surface of the main wheel body to axially position the two bearings.

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