Trundle and luggage thereof

Abstract

The utility model relates to the technical field of articles for daily use, in particular to a trundle and a luggage with the trundle. Comprising a wheel seat fixedly connected with a box body, a wheel carrier rotationally connected with the wheel seat, two sets of wheel bodies and a rotating shaft, the two sets of wheel bodies are arranged on the two sides of the wheel carrier respectively, the two sets of wheel bodies and the wheel carrier are connected in series through the rotating shaft, each wheel body comprises a hub, a bearing, a rubber coating nested part and a rubber coating layer, and an outer ring of each bearing is fixedly connected with the hub. The rubber-coated nested part is fixedly installed on the outer side of the hub, and the rubber-coated layer wraps the outer side of the rubber-coated nested part. According to the utility model, by adopting an integrated rubber coating mode, the problems of loud noise and serious abrasion caused by exposure of the bearing shaft are avoided, and meanwhile, the industrial aesthetic feeling of a product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of daily necessities, in particular to a caster and a case thereof. Background Art

[0002] With the development and progress of society, travel has become an important part of satisfying people's spiritual and cultural development. Many people choose to travel with luggage. Suitcases typically have four universal casters fixed to the four corners of their base. These casters not only affect the suitcase's mobility but also its comfort and durability.

[0003] Existing casters are generally divided into two categories. One is a single wheel, in which both sides are rotatably connected to the wheel frame, and the bearings are not exposed. However, this reduces the contact surface with the ground, resulting in imbalance. Another type is a double wheel, which typically has a rotating wheel on each side of the wheel frame, which has a larger contact surface with the ground and thus better balance. However, double-wheel universal casters also have certain drawbacks. Some double-wheel universal casters have exposed bearings, which easily allow dust and impurities to enter the bearings during use. This dust and impurities can easily cause more wear on the bearings, further reducing the service life of the universal caster. To address this problem, another part of double-wheel universal casters has protective covers installed on the outside of the wheels. However, during use, as the universal caster is bumped and collided, the exposed protective covers can easily fall off or create gaps, allowing dust and impurities to enter the bearings. At the same time, the assembled casters are too large and too complex to be fully encapsulated. Utility Model Content

[0004] In view of this, in order to overcome the above technical problems, the present invention designs a caster to solve the above technical problems.

[0005] The utility model provides a caster, comprising a wheel seat fixedly connected to a box body, a wheel frame rotatably connected to the wheel seat, two sets of wheel bodies and a rotating shaft. The two sets of wheel bodies are respectively arranged on both sides of the wheel frame, and the three are connected in series through the rotating shaft. The rotating shaft of this scheme adopts

[0006] The wheel body includes a bearing, a hub formed on the bearing, a rubber-coated nested piece and a rubber-coated layer. The outer ring of the bearing is fixedly connected to the hub, the rubber-coated nested piece is fixedly installed on the outside of the hub, and the rubber-coated layer is wrapped around the outside of the rubber-coated nested piece.

[0007] Preferably, the connection between the rubber-coated nested part and the wheel hub is a snap-on and slot connection or a gluing connection.

[0008] Preferably, the bearing includes a bearing seat body and an insert portion, and the insert portion is provided on the bearing seat body. During installation, the insert portion is inserted into the wheel frame.

[0009] Preferably, the rubber-coated nested piece is provided with a clamping block for preventing the rubber-coated layer from spinning, and the clamping block is provided on the circumferential surface of the hub.

[0010] Preferably, the caster further includes a brake assembly, which includes a brake rope, a brake bracket, a rope cap and an elastic component, the brake rope passes through the wheel seat and the wheel frame, one end of the brake rope is fixedly connected to the rope cap, the elastic component is fixedly connected to the rope cap, and the elastic component is used to push the rope cap to reset; the brake bracket is slidably connected to the wheel frame, one end of the brake bracket is connected to the brake rope and the rope cap, and the other end of the brake bracket is used to lock the wheel body.

[0011] Preferably, a brake buckle is provided at one end of the brake bracket away from the rope pull cap, and a plurality of brake slots matching the shape of the brake buckle are provided on the inner end surface of the wheel hub, and the brake slots are used to engage the brake buckle.

[0012] Preferably, the outer shell of the brake rope is provided with a brake sleeve, and the brake sleeve is rotatably connected to the wheel frame and the wheel seat.

[0013] The utility model further discloses a case, comprising the case caster as described in any one of the above solutions and a case body, wherein the bottom of the case body is fixedly connected to the case caster.

[0014] Beneficial effect: The rubber-coated nested parts protect the bearings and prevent the bearings from being exposed, which in turn causes dust and gravel to fall into the bearings, resulting in unnecessary wear of the bearings when the casters rotate, further avoiding the reduction of the service life of the bearings and the entire rubber-coated brake caster;

[0015] The rubber layer is wrapped around the rubber-coated nested component, and the rubber layer protects the rubber-coated nested component, preventing the rubber-coated nested component from falling off due to vibration and collision, and reducing noise at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0017] Figure 1 It is an external axial view of the utility model;

[0018] Figure 2 It is an axial cross-sectional view of the present utility model;

[0019] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 4 It is a radial cross-sectional view of the present utility model;

[0021] In the figure: 1. Wheel seat; 2. Wheel frame; 3. Wheel body; 31. Wheel hub; 311. Brake slot; 32. Rubber-coated nesting piece; 322. Clamping block; 33. Rubber-coated layer; 4. Rotating shaft; 41. Bearing; 42. Rivet; 5. Brake assembly; 51. Brake rope; 52. Brake sleeve; 53. Brake bracket; 531. Brake buckle; 54. Rope cap; 55. Elastic component. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance; in addition, unless otherwise expressly 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, an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this 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 response to the problems existing in the prior art, the following solutions are proposed:

[0025] Example 1

[0026] like Figure 1-4 As shown, Figure 1-4As shown, the wheel body 3 in the present invention will contact the ground and roll, specifically, the outermost rubber layer 32 of the wheel body 3 contacts the ground; when the user pushes or pulls the box, the wheel body 3 will rotate. A bearing 41 is installed between the wheel body 3 and the rotating shaft. The bearing 41 is used to reduce the friction when the wheel body 3 rotates, and to avoid direct friction between the wheel body 3 and the rotating shaft 4, which leads to wear. The rotating shaft adopts a riveted shaft. The wheel body 3 also includes a rubber-coated nest 32. The rubber-coated nest 32 is used to protect the bearing 41, and to prevent the bearing 41 from being exposed, thereby causing dust and gravel to fall into the bearing 41, causing the bearing 41 to wear and reduce its service life. At the same time, the rubber-coated nest 32 and the wheel hub 31 are also wrapped with a rubber layer 33. The rubber layer 33 protects the rubber-coated nest 32 and prevents the rubber-coated nest 32 from falling off due to vibration and collision.

[0027] It is worth mentioning that, in this embodiment, the rubber layer 33 is made of a flexible material with a certain degree of transparency, such as TPE material. The purpose of using such a flexible material is to consider two aspects:

[0028] First, during the use of casters, the road surface is not necessarily flat and smooth. Therefore, in order to reduce the noise caused by the vibration generated during the movement of the luggage and the damage to the items inside the luggage, the rubber layer 33 is equivalent to adding a buffer layer and a sound-absorbing layer to overcome the above problems.

[0029] Second: The purpose of the rubber coating layer 33 having a certain degree of transparency is to allow consumers to see the structure of the rest of the caster, mainly the structure of the rubber coating nested part 32, thereby forming a "contrast color" effect, which to a certain extent enhances the user's experience of beauty and personalization.

[0030] When assembling this device, the rotating shaft 4 and the wheel frame 2 are assembled first. A bearing 41 is inserted into the rivet 42. The bearing 41 is an insert bearing 41. The rivet 42 and the bearing 41 are then inserted into the rotation hole of the wheel frame 2. Another bearing 41 is inserted into the end of the bearing 41. After the inner ring of the bearing 41 is fixed to the rivet 42 and the wheel frame 2, the rivet 42 is flattened to form a riveted connection. In this way, we have completed the installation of the rotating shaft 4 and the wheel frame 2. Compared with the method of using double-axis riveting or threaded connection and limit pins to limit the position of the rotating shaft, the method of riveting with rivets 42 is more secure and not easy to fall off, and it is also not easy to wear.

[0031] Then, the rubber-coated nesting piece 32 is closed on the outer cover of the wheel hub 31. The rubber-coated nesting piece 32 completely wraps the wheel hub 31, and the fixed connection is completed by the snap-on slots on the rubber-coated nesting piece 32 and the wheel hub 31; then, the outside of the wheel hub 31 and the rubber-coated nesting piece 32 are mold-injected with glue, so that the outside of the wheel hub 31 and the rubber-coated nesting piece 32 are wrapped with the rubber layer 33, and the rubber layer 33 is reinforced by the snap-on slots opened on the outer edge of the wheel hub 31. Finally, the two wheel bodies 3 are assembled with the wheel frame 2 bearing 41. First, the outer ring of the bearing 41 is inserted into the connecting hole of a wheel hub 31, and then the connecting hole is fixedly connected to the outer ring of the bearing 41. The above steps complete the assembly of one set of wheel bodies 3, the wheel frame 2, and the bearing 41. Repeat the above steps to assemble another set of wheel bodies 3, the wheel frame 2, and the bearing 41.

[0032] This caster is easy and convenient to assemble, and the bearing 41 is protected by the rubber-coated nesting piece 32 and the rubber-coated layer 33 to prevent the bearing 41 from being exposed, thereby causing dust and gravel to fall into the bearing 41, causing unnecessary wear on the bearing 41 when the caster rotates, further reducing the service life of the bearing 41 and the entire rubber-coated brake box caster.

[0033] Example 2, as Figure 3-4 As shown, the brake assembly 5 mainly includes a brake rope 51, a brake sleeve 52, a brake bracket 53, a rope cap 54 and an elastic component 55. The brake sleeve 52 is sleeved on the outside of the brake rope 51, and the brake sleeve 52 is rotatably connected to the wheel frame 1 and the wheel seat 2. The brake sleeve 52 is used to isolate the brake rope 51 from the wheel frame 1 and the wheel body 3 to avoid friction and conflict between the brake rope 51 and the wheel frame 1 and the wheel body 3 when the brake rope 51 is in operation, thereby protecting the brake rope 51 from wear; the brake rope 51 is The end of the rope 51 is fixedly connected to the rope cap 54, and the brake rope 51 passes through the brake bracket 53. The rope cap 54 is fixedly connected to the brake bracket 53. An elastic component 55 is fixedly connected between the rope cap 54 and the brake sleeve 52. When the user pulls the brake rope 51, the elastic component 55 contracts under the force, and the brake rope 51 drives the brake bracket 53 to move through the rope cap 54. When the user releases the brake rope 51, the elastic component 55 rebounds and pushes the rope cap 54 and the brake bracket 53 to reset.

[0034] The brake bracket 53 is slidably connected to the wheel frame 1. A brake buckle 531 is provided at one end of the brake bracket 53. The inner side of the wheel hub 31 is provided with a plurality of brake slots 311 that match the shape of the brake buckle 531. When the brake rope 51 drives the brake bracket 53 to move, the brake buckle 531 will be stuck in the brake slot 311, thereby achieving the purpose of locking the wheel body 3. When the brake bracket 53 is forced to reset, the brake buckle 531 will slide out of the brake slot 311, thereby completing the unlocking action. Braking by engaging the brake buckle 531 with the brake slot 311 can completely lock the wheel. Compared with the traditional brake disc braking method that uses friction, the brake of the present invention can prevent the wheel body 3 from continuing to rotate when the brake is activated.

[0035] It should be noted that the present invention also discloses a luggage, comprising a luggage body and the casters of any one of the above solutions, wherein the casters are fixedly arranged at the bottom of the luggage body.

[0036] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A caster comprising a wheel frame (2), a wheel body (3) and a rotating shaft (4), wherein the two wheel bodies (3) are respectively arranged on both sides of the wheel frame (2), and characterized in that: The wheel body (3) comprises a bearing (41), a wheel hub (31) formed on the bearing (41), a rubber-coated nested piece (32) and a rubber-coated layer (33), wherein the rubber-coated layer (33) is wrapped around the outside of the rubber-coated nested piece (32), and the rubber-coated nested piece (32) is fixedly mounted on the wheel hub (31).

2. The caster according to claim 1, characterized in that: The rubber-coated nested piece (32) is mounted on the wheel hub (31) by means of a snap-fit ​​and slot connection or a glue connection.

3. The caster according to claim 1, wherein: The width of the inner ring of the bearing (41) is greater than the width of the outer ring of the bearing and forms an insertion portion inserted into the wheel frame. The insertion portion is provided on the bearing seat body. During installation, the insertion portion is inserted into the wheel frame (2).

4. The caster according to claim 2, wherein: A clamping block (322) is provided on the rubber-coated nesting piece (32). In the assembled state, the clamping block (322) is provided on the circumferential surface of the wheel hub (31).

5. A bag, characterized in that: The invention comprises the luggage caster according to any one of claims 1 to 4.

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