Maintenance-free walking wheel assembly

Abstract

The utility model discloses a maintenance-free walking wheel assembly which comprises a supporting cylinder and a solid wheel, the solid wheel is coaxially sleeved on the supporting cylinder and attached to the outer circumferential surface of the supporting cylinder, the maintenance-free walking wheel assembly further comprises a pressing disc, a first blocking edge is arranged on one side of the supporting cylinder, the edge of the first blocking edge protrudes out of the outer circumferential surface of the supporting cylinder, and a second blocking edge is arranged on the other side of the supporting cylinder. The first flange is attached to the wall face of one side of the solid wheel. The pressing disc is detachably installed on the other side of the supporting cylinder, a second blocking edge is arranged on the edge of the pressing disc, and the second blocking edge protrudes out of the outer circumferential face of the supporting cylinder and is tightly pressed on the wall face of the other side of the solid wheel. By arranging the pressing disc, the solid wheel can be fixed through the first blocking edge and the second blocking edge, when the solid wheel needs to be replaced, the solid wheel can be rapidly disassembled and assembled only by disassembling the pressing disc, the solid wheel is directly replaced, maintenance-free is achieved, disassembling and assembling of the supporting cylinder are not involved in the disassembling and assembling process, and a bearing cannot be damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of running wheels, in particular to a maintenance-free running wheel assembly. Background Art

[0002] The main function of the travel wheel is to support the equipment so that it can be moved easily. The travel wheel is generally composed of an inner support wheel rim, an outer solid wheel and an axle. After long-term use under load, the solid wheel will wear and deform, and the solid wheel needs to be maintained. Traditional travel wheels have certain inconveniences when maintaining or replacing solid wheels. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is to provide a maintenance-free running wheel assembly which is convenient for replacing the outer rubber ring.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a maintenance-free walking wheel assembly, including a support tube and a solid wheel, the solid wheel is coaxially sleeved on the support tube and fits with the outer circumferential surface of the support tube, and also includes a pressure plate, a first rib is arranged on one side of the support tube, the edge of the first rib protrudes from the outer circumferential surface of the support tube, and the first rib is fit with one side wall of the solid wheel; the pressure plate is detachably mounted on the other side of the support tube, and a second rib is arranged on the edge of the pressure plate, the second rib protrudes from the outer circumferential surface of the support tube and is pressed tightly on the other side wall of the solid wheel.

[0005] In the above-mentioned maintenance-free traveling wheel assembly, the diameter of one end of the supporting tube provided with the first rib is greater than or equal to the diameter of one end of the supporting tube provided with the pressure plate.

[0006] In the above maintenance-free running wheel assembly, when the two sides of the solid wheel are respectively in contact with the first flange and the second flange, the axial length B of the inner annular surface of the solid wheel is greater than or equal to the axial length of the outer circumferential surface of the support cylinder, so as to ensure that the solid wheel can be fully compressed when the pressure plate is installed and locked.

[0007] In the maintenance-free running wheel assembly, the distance between the first rib and the second rib gradually increases in the direction away from the support tube.

[0008] In the maintenance-free running wheel assembly, an annular protrusion is formed on the inner annular surface of the solid wheel, and two sides of the annular protrusion are respectively in contact with the first rib and the second rib.

[0009] In the above-mentioned maintenance-free running wheel assembly, the axial length of the annular protrusion is smaller than the axial length of the solid wheel; and the axial length of the annular protrusion gradually increases from the inside to the outside.

[0010] The maintenance-free walking wheel assembly is provided with a mounting hole in the support tube, a bearing is installed in the mounting hole, a support shaft is installed in the bearing, and one end of the support shaft passes through the mounting hole and is fixedly connected to a fixing plate.

[0011] The above-mentioned maintenance-free walking wheel assembly is provided with a shoulder in one end of the mounting hole, one end of the outer ring of the bearing is fitted on the shoulder, and a retaining ring groove is opened on the inner wall of the other end of the mounting hole, a retaining ring is installed in the retaining ring groove, and the retaining ring is fitted with the other end of the outer ring of the bearing; a shoulder is provided on one end of the support shaft, the shoulder is pressed on one end of the inner ring of the bearing, and the other end of the support shaft is arranged in the inner ring of the bearing, a first threaded hole is opened on the end surface of the other end of the support shaft, and a pressure ring is provided on the other end of the inner ring of the bearing, and a screw passes through the pressure ring and is threadedly connected in the first threaded hole.

[0012] In the maintenance-free running wheel assembly, a retaining ring is provided on one end of the mounting hole, an oil seal is sleeved on the support shaft, the outer wall of the oil seal is in sealing contact with the wall of the mounting hole, and the oil seal is provided close to the retaining ring; a sealing ring is provided between the support cylinder and the pressure plate, and the diameter of the sealing ring is larger than the aperture of the mounting hole, and the sealing ring is provided on the outer circumference of the mounting hole. By providing the oil seal and the sealing ring to cooperate with each other, the two ends of the bearing and the internal related parts can be protected, and the effect of waterproofing and dustproofing can be achieved.

[0013] The above-mentioned maintenance-free walking wheel assembly has hollow grooves opened inside the support tube at both ends, a second threaded hole is opened between two adjacent hollow grooves, a through hole is opened on the pressure plate, and the fixing bolt passes through the through hole on the pressure plate and is threadedly connected in the second threaded hole.

[0014] The technical solution of the utility model has achieved the following beneficial technical effects:

[0015] 1. By setting a pressure plate, the solid wheel can be fixed by using the first rib and the second rib. When the solid wheel needs to be replaced, the solid wheel can be quickly disassembled and assembled by simply removing the pressure plate. The solid wheel can be directly replaced, which is maintenance-free. During disassembly and assembly, the support cylinder is not involved, and the bearing will not be damaged.

[0016] 2. By setting a pressure plate in conjunction with a sealing ring and an oil seal, the entire bearing installation cavity can be sealed, thereby preventing external water, impurities, etc. from entering the bearing and increasing its service life; and when disassembling and assembling the pressure plate, the rotation state of the bearing can be directly observed, and the bearing can be directly maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1A schematic diagram of a three-dimensional cross-sectional structure of the utility model;

[0018] Figure 2 A schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 3 A three-dimensional structural schematic diagram of the utility model;

[0020] Figure 4 A schematic diagram of the three-dimensional structure of the utility model with the solid wheel removed;

[0021] Figure 5 A schematic diagram of the three-dimensional structure of the utility model with the solid wheel and the pressure plate removed;

[0022] Figure 6 A three-dimensional structural schematic diagram of a pressure plate of the utility model.

[0023] The reference numerals in the figure are represented as follows: 1-support cylinder; 2-first flange; 3-pressure plate; 4-second flange; 5-fixing plate; 6-solid wheel; 7-fixing bolt; 8-hollow groove; 9-second threaded hole; 10-mounting hole; 11-support shaft; 12-bearing; 13-first threaded hole; 14-screw; 15-pressure ring; 16-shoulder; 17-oil seal; 18-retaining ring; 19-annular protrusion; 20-circlip groove; 21-circlip; 22-sealing ring. DETAILED DESCRIPTION

[0024] The maintenance-free running wheel assembly in this embodiment is as follows: Figure 1-2 As shown, it includes a support cylinder 1 and a solid wheel 6, the solid wheel 6 is coaxially sleeved on the support cylinder 1 and fits with the outer circumferential surface of the support cylinder 1, and also includes a pressure plate 3, a first rib 2 is arranged on one side of the support cylinder 1, the edge of the first rib 2 protrudes from the outer circumferential surface of the support cylinder 1, and the first rib 2 is fit with one side wall of the solid wheel 6; the pressure plate 3 is detachably mounted on the other side of the support cylinder 1, and a second rib 4 is arranged on the edge of the pressure plate 3, the second rib 4 protrudes from the outer circumferential surface of the support cylinder 1 and is pressed tightly on the other side wall of the solid wheel 6.

[0025] like Figure 5 As shown, hollow grooves 8 are opened inside the support tube 1 at both ends, and a second threaded hole 9 is opened between two adjacent hollow grooves 8. A through hole is opened on the pressure plate 3, and the fixing bolt 7 passes through the through hole on the pressure plate 3 and is threadedly connected in the second threaded hole 9. In other embodiments, other detachable installation methods can also be used.

[0026] like Figure 2As shown, the diameter of one end of the support cylinder 1 provided with the first flange 2 is greater than or equal to the diameter of one end of the support cylinder 1 provided with the pressure plate 3, and the shape of the support cylinder is cylindrical or truncated cone, so that the solid wheel 6 can be installed on the support cylinder 1 from the side without the first flange 2.

[0027] like Figure 2 As shown, when the two sides of the solid wheel 6 are respectively in contact with the first rib 2 and the second rib 4: the axial length B of the inner annular surface of the solid wheel 6 is greater than or equal to the axial length of the outer circumferential surface of the support tube 1; the spacing between the first rib 2 and the second rib 4 gradually increases in the direction away from the support tube 1, and the two sides of the solid wheel 6 can be pressed by utilizing the outwardly expanding first rib 2 and second rib 4. At the same time, when the solid wheel 6 is under pressure, it will not deviate to the sides and can automatically be in the middle position of the support tube 1.

[0028] like Figure 2 As shown, an annular protrusion 19 is formed on the inner annular surface of the solid wheel 6, and the two sides of the annular protrusion 19 are respectively in contact with the first flange 2 and the second flange 4; the axial length of the annular protrusion 19 is smaller than the axial length of the solid wheel 6; the axial length of the annular protrusion 19 gradually increases from the inside to the outside, and the annular protrusion 19 is used to increase the contact width of the solid wheel 6 with the ground freely without being restricted by the first flange 2 and the second flange 4, thereby increasing the pressure-bearing area.

[0029] like Figure 1-2 As shown, a mounting hole 10 is opened in the support cylinder 1, a bearing 12 is installed in the mounting hole 10, a support shaft 11 is installed in the bearing 12, one end of the support shaft 11 passes through the mounting hole 10 and is fixedly connected to a fixing plate 5, and the bearing 12 can be a hub bearing, a deep groove ball bearing with two or more rows, a combination of two angular contact bearings, or a combination of two cylindrical roller bearings.

[0030] like Figure 1-2 As shown, a shoulder 16 is provided in one end of the mounting hole 10, and one end of the outer ring of the bearing 12 is fitted on the shoulder 16, and a retaining ring groove 20 is opened on the inner wall of the other end of the mounting hole 10, and a retaining ring 21 is installed in the retaining ring groove 20, and the retaining ring 21 is fitted with the other end of the outer ring of the bearing 12; a shoulder is provided on one end of the support shaft 11, and the shoulder is pressed on one end of the inner ring of the bearing 12, and the other end of the support shaft 11 is arranged in the inner ring of the bearing 12, and a first threaded hole 13 is opened on the end face of the other end of the support shaft 11, and a pressure ring 15 is provided on the other end of the inner ring of the bearing 12, and a screw 14 passes through the pressure ring 15 and is threadedly connected in the first threaded hole 13.

[0031] A retaining ring 18 is provided on one end of the mounting hole 10, and an oil seal 17 is sleeved on the support shaft 11. The outer wall of the oil seal 17 is sealingly fitted with the hole wall of the mounting hole 10, and the oil seal 17 is arranged close to the retaining ring 18; a sealing ring 22 is installed between the support cylinder 1 and the pressure plate 3, and the diameter of the sealing ring 22 is larger than the aperture of the mounting hole 10, and the sealing ring 22 is arranged on the outer circumference of the mounting hole 10.

[0032] When replacing the solid wheel 6, remove the fixing bolts 7 to release the pressure plate 3 from fixing the solid wheel 6, then pull out the solid wheel 6 to complete the disassembly, then reinstall the new solid wheel 6 on the support tube 1, and reinstall the pressure plate 3 to fix the new solid wheel 6.

[0033] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A maintenance-free running wheel assembly, comprising a support tube (1) and a solid wheel (6), wherein the solid wheel (6) is coaxially sleeved on the support tube (1) and fits with the outer circumferential surface of the support tube (1), characterized in that: It also includes a pressure plate (3), a first rib (2) is arranged on one side of the support tube (1), the edge of the first rib (2) protrudes from the outer circumferential surface of the support tube (1), and the first rib (2) is in contact with the wall surface of one side of the solid wheel (6); the pressure plate (3) can be detachably mounted on the other side of the support tube (1), and a second rib (4) is arranged on the edge of the pressure plate (3), and the second rib (4) protrudes from the outer circumferential surface of the support tube (1) and is pressed against the wall surface of the other side of the solid wheel (6).

2. The maintenance-free running wheel assembly according to claim 1, characterized in that: The diameter of one end of the support cylinder (1) provided with the first retaining edge (2) is greater than or equal to the diameter of one end of the support cylinder (1) provided with the pressure plate (3).

3. The maintenance-free running wheel assembly according to claim 1, characterized in that: When the two sides of the solid wheel (6) are respectively in contact with the first rib (2) and the second rib (4), the axial length B of the inner annular surface of the solid wheel (6) is greater than or equal to the axial length of the outer circumferential surface of the support tube (1).

4. The maintenance-free running wheel assembly according to claim 1, characterized in that: The distance between the first rib (2) and the second rib (4) gradually increases in a direction away from the support tube (1).

5. The maintenance-free running wheel assembly according to claim 1, characterized in that: An annular protrusion (19) is formed on the inner annular surface of the solid wheel (6), and two sides of the annular protrusion (19) are respectively in contact with the first rib (2) and the second rib (4).

6. The maintenance-free running wheel assembly according to claim 5, characterized in that: The axial length of the annular protrusion (19) is smaller than the axial length of the solid wheel (6); and the axial length of the annular protrusion (19) gradually increases from the inside to the outside.

7. The maintenance-free running wheel assembly according to any one of claims 1 to 6, characterized in that: The support tube (1) is provided with a mounting hole (10), a bearing (12) is installed in the mounting hole (10), a support shaft (11) is installed in the bearing (12), and one end of the support shaft (11) passes through the mounting hole (10) and is fixedly connected to a fixing plate (5).

8. The maintenance-free running wheel assembly according to claim 7, characterized in that: A shoulder (16) is provided in one end of the mounting hole (10), one end of the outer ring of the bearing (12) is fitted on the shoulder (16), a retaining ring groove (20) is provided on the inner wall of the other end of the mounting hole (10), a retaining ring (21) is installed in the retaining ring groove (20), and the retaining ring (21) is fitted with the other end of the outer ring of the bearing (12); a shoulder is provided on one end of the support shaft (11), the shoulder is pressed on one end of the inner ring of the bearing (12), the other end of the support shaft (11) is arranged in the inner ring of the bearing (12), a first threaded hole (13) is provided on the end surface of the other end of the support shaft (11), a pressure ring (15) is provided on the other end of the inner ring of the bearing (12), and a screw (14) passes through the pressure ring (15) and is threadedly connected in the first threaded hole (13).

9. The maintenance-free running wheel assembly according to claim 8, characterized in that: A retaining ring (18) is provided on one end of the mounting hole (10), an oil seal (17) is sleeved on the support shaft (11), the outer wall of the oil seal (17) is sealingly fitted with the hole wall of the mounting hole (10), and the oil seal (17) is arranged close to the retaining ring (18); a sealing ring (22) is installed between the support cylinder (1) and the pressure plate (3), and the diameter of the sealing ring (22) is larger than the hole diameter of the mounting hole (10), and the sealing ring (22) is arranged on the outer circumference of the mounting hole (10).

10. The maintenance-free running wheel assembly according to claim 1, characterized in that: Both ends of the support tube (1) are provided with hollow grooves (8) therein, and a second threaded hole (9) is provided between two adjacent hollow grooves (8). A through hole is provided on the pressure plate (3), and a fixing bolt (7) passes through the through hole on the pressure plate (3) and is threadedly connected in the second threaded hole (9).

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