Trundle and luggage

Abstract

The utility model relates to a caster and luggage, belongs to luggage technical field, including wheel carrier, axle and wheel body, the axle passes through the wheel carrier, the wheel body is located the wheel carrier one side, the wheel body is provided with the jack, the other end of axle is with the jack plug-in cooperation, when the wheel body rotates, the axle rotates around its own axis on the wheel carrier. The caster has the effect that the caster is not prone to unsmooth rotation.

Description

Technical Field

[0001] The utility model relates to the technical field of bags, in particular to a caster and a bag. Background Art

[0002] A suitcase is a container for storing personal belongings when traveling. In order to facilitate the movement of the suitcase, casters are usually provided on the suitcase.

[0003] In the prior art, the axle is generally inserted into the wheel seat, the hub is injection molded on the bearing, the tread is covered on the hub (to reduce the noise during the use of the caster), and then the hub is installed on the axle, the caster hub is locked with a nut, and the side cover is installed. The side cover not only decorates the caster hub, but also prevents sand and dust from being drawn into the caster axle. However, in actual use, the side cover often falls off due to the impact and collision of the caster caused by the movement of the suitcase. Utility Model Content

[0004] The present application aims to provide a caster without side covers, and the technical solution is as follows:

[0005] A caster comprises a wheel frame, an axle and a wheel body, wherein the wheel body comprises a hub and an integrated tread covering the outer edge of the hub and the outer side of the hub, the hub is injection molded or nested at the end of the axle without exposing the end of the axle, the wheel frame is provided with a bearing, the axle passes through the bearing and is inserted into the wheel frame, and a limiting structure is provided between the wheel frame and the axle.

[0006] One form of the limiting structure, the limiting structure includes an annular groove arranged on the wheel axle and a limiting screw arranged on the wheel frame for clamping the annular groove.

[0007] The second form of the limiting structure includes an annular groove arranged on the wheel axle and a ball arranged in the axial hole of the wheel frame, which pops out in a natural state but can be compressed back. When the wheel axle is inserted into the wheel frame, the ball is embedded in the annular groove to lock the wheel axle.

[0008] The third form of the limiting structure includes an annular groove formed in the shaft hole of the wheel frame and a ball or pin that can be pressed back and arranged on the wheel axle.

[0009] The wheel axle is also provided with a convex ring for spacing the wheel hub and the bearing.

[0010] On the other hand, the present application also seeks to protect the technical solution of a bag equipped with the above-mentioned casters.

[0011] Beneficial effects:

[0012] 1. When the wheel hub rotates, the wheel axle can be driven to rotate with the wheel hub on the wheel frame. Even if the dust and impurities from the outside come into contact with the connection between the wheel hub and the wheel axle, the rotation of the wheel hub will not be affected. Therefore, the problem of poor rotation will not easily occur. This reduces the environmental requirements of the caster during use, thereby improving the applicability of the caster. This also prevents the suitcase from being difficult to drag, and also achieves the effect of reducing the failure rate of the suitcase.

[0013] 2. By providing an integrated tread, the integrated tread can protect the wheel hub, so that the wheel hub will not be easily worn or even damaged when rotating, thereby achieving the effect of increasing the service life of the wheel hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0015] Figure 1 is a three-dimensional schematic diagram of a caster in Example 1 of the present application;

[0016] Figure 2 yes Figure 1 Schematic diagram of the internal structure;

[0017] Figure 3 is a three-dimensional schematic diagram of a caster in Example 2 of the present application;

[0018] Figure 4 yes Figure 3 Schematic diagram of the internal structure.

[0019] In the figure: 1, wheel frame; 11, first screw hole; 12, second screw hole; 2, wheel axle; 21, left axle; 211 and 221, annular groove; 22, right axle; 3, wheel body; 31, wheel hub; 311, plug-in hole; 32, integrated tread; 321, soft side; 322, tread; 4, limit screw. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. In view of the problems existing in the prior art, the following solutions are proposed:

[0023] Example 1

[0024] Embodiment 1 is a caster with only one wheel body. Figure 1 As shown, it includes a wheel frame 1, an axle 2 and a wheel body 3. A bearing for the axle 2 to pass through is arranged on the wheel frame 1. The axle 2 is horizontally passed through the wheel frame 1. The wheel body 3 includes a hub 31 and an integrated tread 32 wrapped on the hub 31. The hub 31 is provided with a plug hole 311 coaxial with the hub 31. The plug hole 311 is a blind hole, and its bottom does not pass through the hub. The end of the axle 2 away from the wheel frame 1 is plugged into the plug hole 311, and when the hub 31 rotates, the axle 2 can rotate around its own axis in the wheel frame 1, which makes it unnecessary to install a bearing on the hub 31. Therefore, even if external dust contacts the plug-in position of the hub 31 and the axle 2, it will not easily cause the hub 31 to rotate poorly.

[0025] In order to reduce the probability of the wheel axle 2 coming off the wheel frame 1, an annular groove is provided on the wheel axle 2, and a screw hole is provided on the wheel frame 1. The limit screw passes through the screw hole and keeps the front part of the limit screw inserted into the annular groove. After passing through the screw hole, the front part of the limit screw shall not affect the rotation of the wheel axle 2 around its own axis, but will limit the movement of the wheel axle 2 on the wheel frame 1 along its own axis.

[0026] The integrated tread 32 is made of TPE material, and includes an integrally formed soft side 321 and a tread 322, wherein the soft side 321 is coated on the side of the wheel hub 31 away from the wheel frame 1 to protect the wheel hub 31, and the tread 322 is coated on the peripheral wall of the wheel hub 31 so as to abut against the ground, which prevents the peripheral wall of the wheel hub 31 from being easily worn, thereby increasing the service life of the wheel hub 31. At the same time, since TPE is a flexible material, when the tread 322 is coated on the peripheral wall of the wheel hub 31, the tread 322 can also achieve a silent effect.

[0027] Example 2.

[0028] The difference between Example 2 of the present application and Example 1 lies in that the number of wheel bodies 3 is different, and the hole on the wheel frame 1 for the wheel axle 2 to pass through is a through hole. In Example 2, two wheel bodies 3 are provided and are respectively located on both sides of the wheel frame 1, while the wheel axle 2 is passed through the wheel frame 1. Two bearings for the wheel axle 2 to pass through are provided on the wheel frame 1, and the two ends of the wheel axle 2 are directly injection molded with the wheel hubs 31 on the two wheel bodies 3.

[0029] Compared with Example 1, the number of wheel bodies 3 is increased, thereby increasing the contact area between the wheel frame 1 and the ground, and further increasing the stability of the wheel frame 1 when the wheel bodies 3 rotate.

[0030] Furthermore, the wheel axle 2 includes a left shaft 21 and a right shaft 22, and the left shaft 21 and the right shaft 22 are connected by threaded fitting, and the ends of the left shaft 21 and the right shaft 22 that are away from each other are respectively plugged into the wheel hubs 31 located on the wheel bodies 3 on both sides of the wheel frame 1, which makes it possible to disassemble the left shaft 21 and the right shaft 22 by twisting the two wheel bodies 3 in opposite directions, thereby facilitating the subsequent replacement of a single wheel body 3 and reducing the cost of maintenance.

[0031] In addition, a ring groove 211 extending circumferentially on the outer wall of the left shaft 21 is provided at the portion of the left shaft 21 located in the wheel frame 1, and a ring groove 221 extending circumferentially on the outer wall of the right shaft 22 is provided at the portion of the right shaft 22 located in the wheel frame 1. At the bottom of the wheel frame 1, a first screw hole 11 and a second screw hole 12 are provided at the positions corresponding to the ring groove 211 and the ring groove 221. The first screw hole 11 and the second screw hole 12 are both threaded holes, and a limit screw 4 is passed through the first screw hole 11 and / or the second screw hole 12. The limit screw 4 is a limit screw, so that when the left shaft 21 and the right shaft 22 are threadedly connected, it is only necessary to screw the limit screw 4 into the first screw hole 11 or the second screw hole 12 so that the end of the limit screw 4 is located in the ring groove 211 or the ring groove 221 to limit the axial movement of the left shaft 21 and the right shaft 22 on the wheel frame 1, so that the left shaft 21 and the right shaft 22 will not easily fall off from the wheel frame 1.

[0032] When the connection between the left shaft 21 and the right shaft 22 fails and becomes unable to be connected subsequently, a limit screw 4 can be respectively inserted into the first screw hole 11 and the second screw hole 12 so that the end of the limit screw 4 in the first screw hole 11 is located in the annular groove 211, and the end of the limit screw 4 in the second screw hole 12 is located in the annular groove 221. This also prevents the left shaft 21 and the right shaft 22 from easily falling off the wheel frame 1 due to the failure of the connection between the two, thereby achieving the effect of increasing the installation stability of the wheel body 3 on the wheel frame 1.

[0033] Example 3

[0034] Embodiment 3 of the present application provides a luggage, and the casters mentioned in the above-mentioned embodiment 1 or embodiment 2 are used at the bottom of the luggage.

[0035] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A caster, comprising a wheel frame (1), a wheel axle (2) and a wheel body (3), characterized in that: The wheel body (3) comprises a wheel hub (31) and an integrated tread (32) covering the outer edge of the wheel hub (31) and the outer side of the wheel hub (31); the wheel hub (31) is injection molded or nested at the end of the wheel axle (2) and does not expose the end of the wheel axle (2); a bearing is provided on the wheel frame (1); the other end of the wheel axle passes through the bearing and is inserted into the wheel frame (1); and a limiting structure is provided between the wheel frame (1) and the wheel axle (2).

2. The caster according to claim 1, characterized in that: The limiting structure comprises an annular groove (221) provided on the wheel axle (2) and a limiting screw provided on the wheel frame (1) and used for clamping the annular groove (221).

3. The caster according to claim 1, characterized in that: The limiting structure includes an annular groove arranged on the wheel axle and a ball arranged in the shaft hole of the wheel frame, which pops out in a natural state but can be compressed back. When the wheel axle is inserted into the wheel frame, the ball is embedded in the annular groove to lock the wheel axle.

4. The caster according to claim 1, characterized in that: The limiting structure includes an annular groove formed in the shaft hole of the wheel frame and a ball or pin which is arranged on the wheel axle and can be pressed back.

5. The caster according to claim 2, 3 or 4, characterized in that: The wheel axle (2) is also provided with a convex ring for spacing the wheel hub and the bearing.

6. A bag equipped with a caster according to any one of claims 1 to 5, characterized in that: The number of casters is at least one.

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