Trolley wheel assembly

By designing the wheel assembly with knobs and compression rings, the wheels are locked by friction, the problem of insufficient stability in some scenarios for children's toy carts is solved, and a fast and simple locking effect is achieved.

CN223290586UActive Publication Date: 2025-09-02赵兵伟
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Patent Information

Application Number
CN202422770224.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-14
Publication Date
2025-09-02
Estimated Expiration
2034-11-14

AI Technical Summary

Technical Problem

The wheels of existing children's toy carts cannot be locked, resulting in insufficient stability in some scenarios.

Method used

A small cart wheel assembly is designed. Through the cooperation of the knob and the compression ring, the wheel lock is achieved by using friction, including the structural design of the outer shaft, inner shaft, wheel hub and ground contact ring. When the knob rotates, the compression ring is forced to fit the outer wheel hub to achieve locking.

Benefits of technology

Simple operation, fast locking of wheels, improving the stability of the cart.

✦ Generated by Eureka AI based on patent content.

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    Figure CN223290586U_ABST
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Abstract

The utility model discloses a trolley wheel assembly, and belongs to the technical field of children products. The wheel assembly comprises a wheel axle mounted on a frame, and a wheel part connected with a bearing is arranged on the wheel axle; the wheel part comprises a knob and two wheel hubs which are buckled with each other; the wheel shaft comprises an outer shaft and an inner shaft; the inner shaft is sleeved in the outer shaft and is fixedly connected with the outer shaft through a screw, the two wheel hubs are sleeved outside the outer shaft, and the central axes of the two wheel hubs coincide; a threaded shaft is arranged on a central shaft of the knob, internal threads are arranged in the inner shaft, and the threaded shaft penetrates through the outer hub to be matched with the internal threads; the outer shaft is further sleeved with a pressing ring, and the pressing ring is located on the outer side of the outer hub. A protrusion is arranged on the outer surface of the pressing ring and penetrates through the extending edge of the inner shaft to abut against the inner surface of the rotary knob. The wheel locking device can lock the rotation of the wheel, and is convenient and fast.
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Description

Technical Field

[0001] The utility model relates to the technical field of children's products, in particular to a wheel assembly for a small cart. Background Art

[0002] Many children's stroller toys have wheels that cannot be locked for rotation. However, in some scenarios, the wheels need to be locked to maintain the stability of the stroller. Utility Model Content

[0003] The purpose of the present invention is to avoid the deficiencies in the above-mentioned background technology and to provide a wheel assembly for a trolley, which is used to realize the rotation of the locked wheel in a convenient and quick manner.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A wheel assembly for a trolley includes a wheel axle mounted on a frame, wherein the wheel axle is provided with a wheel member connected to a bearing;

[0006] The wheel component includes a knob and two interlocking wheel hubs;

[0007] The wheel axle includes an outer shaft and an inner shaft; the inner shaft is sleeved in the outer shaft, and the two are fixedly connected by screws, the two wheel hubs are sleeved outside the outer shaft and the central axes of the three coincide; a threaded shaft is provided on the central shaft of the knob, and an internal thread is provided inside the inner shaft, and the threaded shaft passes through the outer hub and cooperates with the internal thread; a clamping ring is also sleeved on the outer shaft, and the clamping ring is located between the outer hub and the knob; a protrusion is provided on the outer surface of the clamping ring, and the extended edge of the protrusion passes through the inner shaft and abuts against the inner surface of the knob.

[0008] Furthermore, the contact portion of the two wheel hubs is provided with a ground contact ring for contacting the ground; the ground contact ring coincides with the center axis of the wheel hub, with part of the ground contact ring overlapping the edge of the inner wheel hub and the other part mounted on the edge of the outer wheel hub.

[0009] Furthermore, the inner shaft and the outer shaft are both sleeve structures, wherein the inner end of the outer shaft is connected to the frame, the outer end of the inner shaft is provided with an extension edge, and the extension edge is provided with a through hole for the protrusion to pass through.

[0010] Furthermore, the threaded shaft is a tubular structure, the end of the tubular structure is a forked structure, the end of the branch of the forked structure is provided with a bend, and the bend is provided with an inclined surface.

[0011] Compared with the background technology, the present invention has the following beneficial effects:

[0012] The utility model can lock the wheel only by turning the knob, and the operation is simple, convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0014] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the present utility model.

[0015] Figure 3 This is a simplified diagram of the knob structure of an embodiment of the utility model;

[0016] Figure 4 It is a structural explosion diagram of the inner shaft and the outer shaft in an embodiment of the present utility model.

[0017] Figure 5 This is a schematic structural diagram of a clamping ring according to an embodiment of the present invention.

[0018] Figure 6 This is a schematic diagram of the matching structure of the inner shaft and the outer shaft in an embodiment of the present utility model.

[0019] Figure 7 This is a schematic diagram of the matching structure of the inner shaft, outer shaft and clamping ring in an embodiment of the present utility model.

[0020] In the figure: 101, outer shaft; 102, inner hub; 104, outer hub; 103, touchdown ring; 105, inner shaft; 106, knob; 107, clamping ring; 1061, threaded shaft; 1062, bend; 1063, inclined surface; 1051, extended edge; 1052, through hole; 1071, protrusion. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] Reference Figures 1 to 7 , this embodiment includes a wheel axle mounted on a vehicle frame, wherein the wheel axle is provided with a wheel member connected to a bearing;

[0023] The wheel component includes a knob and two interlocking wheel hubs;

[0024] The wheel axle includes an outer shaft and an inner shaft; the inner shaft is sleeved in the outer shaft, and the two are fixedly connected by screws, the two wheel hubs are sleeved outside the outer shaft and the central axes of the three coincide; a threaded shaft is provided on the central shaft of the knob, and an internal thread is provided inside the inner shaft, and the threaded shaft passes through the outer hub and cooperates with the internal thread; a clamping ring is also sleeved on the outer shaft, and the clamping ring is located between the outer hub and the knob; a protrusion is provided on the outer surface of the clamping ring, and the extended edge of the protrusion passes through the inner shaft and abuts against the inner surface of the knob.

[0025] The contact part of the two wheel hubs is provided with a ground contact ring for contacting the ground; the ground contact ring coincides with the center axis of the wheel hub, part of the ground contact ring overlaps the edge of the inner wheel hub, and the other part is mounted on the edge of the outer wheel hub.

[0026] The inner shaft and the outer shaft are both sleeve structures, wherein the inner end of the outer shaft is connected to the vehicle frame, the outer end of the inner shaft is provided with an extension edge, and the extension edge is provided with a through hole for the protrusion to pass through.

[0027] The threaded shaft is a tubular structure with a bifurcated end. The bifurcated end is provided with a bend, and the bend is provided with an inclined surface. The bend cooperates with a latch on the inner shaft to prevent slippage. The inclined surface facilitates the bend to slide through the latch by deformation.

[0028] In this embodiment, by rotating the knob, the knob moves inward, forcing the clamping ring to adhere to the outer hub, and locking the wheel rotation through friction.

Claims

1. A wheel assembly for a trolley, characterized in that: It includes a wheel axle mounted on the frame, and a wheel member connected to a bearing is provided on the wheel axle; The wheel component includes a knob and two interlocking wheel hubs; The wheel axle includes an outer shaft and an inner shaft; the inner shaft is sleeved in the outer shaft, and the two are fixedly connected, the two wheel hubs are sleeved outside the outer shaft and the central axes of the three coincide; a threaded shaft is provided on the central shaft of the knob, and an internal thread is provided inside the inner shaft, and the threaded shaft passes through the outer hub and cooperates with the internal thread; a clamping ring is also sleeved on the outer shaft, and the clamping ring is located between the outer hub and the knob; a protrusion is provided on the outer surface of the clamping ring, and the extended edge of the protrusion passes through the inner shaft and abuts against the inner surface of the knob.

2. A trolley wheel assembly according to claim 1, characterized in that: The contact part of the two wheel hubs is provided with a ground contact ring for contacting the ground; the ground contact ring coincides with the center axis of the wheel hub, part of the ground contact ring overlaps the edge of the inner wheel hub, and the other part is mounted on the edge of the outer wheel hub.

3. A trolley wheel assembly according to claim 1, characterized in that: The inner shaft and the outer shaft are both sleeve structures, wherein the inner end of the outer shaft is connected to the vehicle frame, the outer end of the inner shaft is provided with an extension edge, and the extension edge is provided with a through hole for the protrusion to pass through.

4. A trolley wheel assembly according to claim 1, characterized in that: The threaded shaft is a tubular structure, the end of the tubular structure is a forked structure, the end of the branch of the forked structure is provided with a bend, and the bend is provided with an inclined surface.