Silent wheel

Abstract

The utility model provides a mute wheel, which comprises a hub and a rubber wheel sleeve arranged on the hub, and is characterized in that the hub is provided with a shaft hole penetrating left and right and two bearing cavities sharing the same central axis with the shaft hole, bearing assemblies are respectively arranged in the two bearing cavities, the hub is provided with a sleeve groove used for placing the rubber wheel sleeve in a sleeved mode, and the rubber wheel sleeve is arranged in the sleeve groove. The sleeve groove is bent towards the center axis of the hub in the arc direction, a plurality of protruding ribs are arranged at the bottom of the sleeve groove, and an air bag is arranged in the rubber wheel sleeve. According to the utility model, the replaceable rubber wheel sleeve is matched with the hub, so that not only is the noise reduction problem of the wheel solved, but also the rubber wheel sleeve can be directly replaced by a new rubber wheel sleeve without replacing the hub after the rubber wheel sleeve is used for a long time and is abraded; and the hub can be molded by adopting an injection molding piece or a metal casting so as to ensure the supporting performance of the hub. Meanwhile, the rubber wheel sleeve of the product also adopts an air bag structure, so that the buffering performance of the wheel is better, and the vibration sense feedback is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a silent wheel applied to a caster wheel. Background Art

[0002] Caster wheels are used in industrial handling, luggage, baby carriages and other occasions. In addition to their load-bearing and universal performance, reducing the noise during use is also a strong improvement requirement at present. Common noise reduction methods include: using soft polyester materials to make the wheels or compounding a soft polyester material wheel surface on plastic wheels. Although the former can also achieve a good noise reduction effect, the support performance of the wheels is weak and not suitable for industrial handling occasions. For the latter, due to the easy wear of the polyester material, on the one hand, it is easy to cause uneven support of each wheel after wear, and on the other hand, the wheels can only be replaced as a whole, resulting in waste of wheel materials. Content of the Utility Model

[0003] The utility model provides a silent wheel, aiming to solve the problem of wheel noise reduction and provide a wheel structure that is easy to repair and replace. The specific technical means adopted are as follows:

[0004] A silent wheel includes a hub and a rubber wheel sleeve installed on the hub. The hub has an axially through hole and two bearing cavities coaxial with the axially through hole. Bearing assemblies are respectively installed in the two bearing cavities. The hub has a socket for sleeving the rubber wheel sleeve. The socket is arcuately bent towards the central axis of the hub, and a plurality of ribs are provided at the bottom of the socket. An airbag is provided in the rubber wheel sleeve.

[0005] Preferably, the airbag is annularly penetrated in the rubber wheel sleeve.

[0006] Preferably, the rubber wheel sleeve has an outer sleeve surface and an inner sleeve surface that respectively bulge outwards in an arc shape. The inner sleeve surface is in close contact with the bottom of the socket under the interference fit between the rubber wheel sleeve and the socket.

[0007] Preferably, the hub is equipped with a left connecting shaft and a right connecting shaft. The left connecting shaft and the right connecting shaft respectively pass through the bearing assemblies on both sides of the hub and are connected to the axially through hole. Clamping parts for gripping and rotating the shaft body by tools are respectively provided at the outer ends of the left connecting shaft and the right connecting shaft.

[0008] Preferably, at least one prying notch is provided on the hub. The prying notch is located on the side surface of the hub and communicates with the socket.

[0009] Compared with the prior art, the advantages of the present utility model are as follows: It is provided with a replaceable rubber wheel sleeve that cooperates with the wheel hub, which not only solves the problem of wheel noise reduction, but also when the rubber wheel sleeve is worn after a long period of use, a new rubber wheel sleeve can be directly replaced without replacing the wheel hub; while the wheel hub can be formed by injection molding or metal casting to ensure its supporting performance. At the same time, the rubber wheel sleeve of this product also adopts an airbag structure, which makes the buffering performance of the wheel better and greatly reduces the shock feedback, and is especially suitable for occasions such as luggage and baby carriages. Moreover, the airbag structure can also save materials during the molding of the rubber wheel sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic assembly structure diagram of a silent wheel.

[0011] Figure 2 It is a schematic disassembly structure diagram of a silent wheel.

[0012] Figure 3 It is a schematic cross-sectional structure diagram of a rubber wheel sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] The following further describes the solution of this application in conjunction with the accompanying drawings:

[0014] See the attached Figures 1 to 3 , the silent wheel includes a wheel hub 1, a rubber wheel sleeve 2 installed on the wheel hub 1, a bearing assembly 3 (ball bearing), a left coupling shaft 4 and a right coupling shaft 5. The wheel hub 1 is a full plastic part or a metal casting, which has an axially through hole 10 running through left and right and two bearing cavities 11 coaxial with the through hole 10. Bearing assemblies 3 are respectively installed in the two bearing cavities 11. The left coupling shaft 4 and the right coupling shaft 5 respectively pass through the bearing assemblies 3 on both sides of the wheel hub 1 and are connected to the through hole 10. The wheel hub 1 has a socket groove 12 for sleeving the rubber wheel sleeve 2. The socket groove 12 is arc-shaped and curved towards the central axis of the wheel hub 1, and a plurality of ribs 13 are provided at the bottom of the socket groove 12. The rubber wheel sleeve 2 has an outer sleeve surface 21 and an inner sleeve surface 22 that respectively bulge outwards in an arc shape. After the rubber wheel sleeve 2 is installed, the ribs 13 are in close contact with its inner sleeve surface 22 to increase the friction force and prevent the rubber wheel sleeve 2 from sliding relative to the wheel hub 1 under external force. An airbag 20 is provided inside the rubber wheel sleeve 2, and the airbag 20 runs through the rubber wheel sleeve 2 in a ring shape.

[0015] This product is provided with a replaceable rubber wheel sleeve 2 that cooperates with the wheel hub 1, which not only solves the problem of wheel noise reduction, but also when the rubber wheel sleeve 2 is worn after a long use time, a new rubber wheel sleeve 2 can be directly replaced without replacing the wheel hub 1; and the wheel hub 1 can be formed by an injection molding part or a metal casting to ensure its supporting performance. At the same time, the rubber wheel sleeve 2 of this product also adopts an airbag structure, making the buffering performance of the wheel better and the shock feedback greatly reduced, which is especially suitable for occasions such as suitcases and baby carriages. Moreover, the airbag structure 2 can also make the rubber wheel sleeve 2 more material-saving during molding.

[0016] Further, in the free state (non-stretched), the minimum inner circle radius of the inner sleeve surface 22 should be smaller than the inner circle radius of the lowest point of the sleeve groove 12, so that the inner sleeve surface 22 can be closely attached to the bottom of the sleeve groove 22 under the interference fit between the rubber wheel sleeve 2 and the sleeve groove 12. In addition, the load-bearing range of the wheel can be designed by controlling the thickness of the rubber wheel sleeve 2 and the airbag air pressure.

[0017] Further, for the convenience of assembly, the left connecting shaft 4 and the right connecting shaft 5 are fixed by a threaded connection method. For example, the docking end of the left connecting shaft 4 is provided with a threaded groove 41, the docking end of the right connecting shaft 5 is provided with a threaded stud 51, the outer end of the left connecting shaft 4 is provided with a clamping part A for a tool to bite and rotate the shaft body, and the outer end of the right connecting shaft 5 is provided with the same clamping part A. When the left connecting shaft 4 and the right connecting shaft 5 respectively pass through the bearing assembly 3 on both sides of the wheel hub 1 to the shaft hole 10, the threaded groove 41 and the threaded stud 51 can be connected by rotating the shaft body of either side.

[0018] Further, for the convenience of replacing the rubber wheel sleeve 2, at least one prying notch 14 is provided on the wheel hub 1. The prying notch 14 is located on the side of the wheel hub and communicates with the sleeve groove 12. A prying piece such as a screwdriver is inserted from the prying notch 14 to the bottom of the sleeve groove 12, and then the rubber wheel sleeve 2 is pried up and pried off the sleeve groove 12.

[0019] The above preferred implementation manners should be regarded as examples of the implementation manners of the application solution of the present application. All technical deductions, replacements, improvements, etc. that are identical, similar to or based on the application solution of the present application should be regarded as the protection scope of this patent.

Claims

1. A silent wheel, comprising a wheel hub and a rubber wheel sleeve mounted on the wheel hub, characterized in that: The wheel hub has an axial hole running through it on the left and right sides and two bearing cavities sharing the same central axis as the axial hole. Bearing assemblies are respectively installed in the two bearing cavities. The wheel hub has a sleeve groove for housing a rubber wheel sleeve. The sleeve groove is curved in an arc direction toward the central axis of the wheel hub, and a plurality of convex ribs are provided at the bottom of the sleeve groove. An air bag is provided in the rubber wheel sleeve.

2. The silent wheel according to claim 1, characterized in that: The air bag is annularly connected inside the rubber wheel sleeve.

3. The silent wheel according to claim 1, characterized in that: The rubber wheel sleeve has an outer sleeve surface and an inner sleeve surface which are respectively raised in an arc direction outwards, and the inner sleeve surface is tightly attached to the groove bottom of the groove under the interference fit between the rubber wheel sleeve and the groove.

4. The silent wheel according to claim 1, characterized in that: The wheel hub is equipped with a left connecting shaft and a right connecting shaft, which pass through the bearing assembly at both sides of the wheel hub and are connected to the shaft hole. The outer ends of the left connecting shaft and the right connecting shaft are respectively provided with clamping parts for tools to bite and rotate the shaft body.

5. The silent wheel according to claim 4, characterized in that: The left connecting shaft and the right connecting shaft are fixed by threaded connection.

6. The silent wheel according to claim 1, characterized in that: The wheel hub is provided with at least one prying notch, which is located on the side of the wheel hub and connected to the sleeve groove.

7. The silent wheel according to claim 1, characterized in that: The wheel hub is a full plastic part or a metal casting.

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