A new silent trolley case

Abstract

The utility model discloses a new type of mute draw-bar box in the technical field of draw-bar box, including the box, recess is set up respectively on the bottom four corners surface of box, the bottom of recess is equipped with base, the below of base is equipped with connecting rod, the bottom of connecting rod sets up the mounting slot, the inboard of mounting slot is rotatably connected with trundle, the inboard wheel core of trundle is constituted by carbon fiber shaft sleeve, the outer wall sleeve of carbon fiber shaft sleeve is equipped with honeycomb aluminum layer and installs, the outside of honeycomb aluminum layer is connected with TPE soft rubber layer, the outside of box is equipped with outer wall layer, the inboard of box is equipped with inner bag layer, is equipped with interlayer between outer wall layer and inner bag layer, the inside of interlayer is filled with polyurethane foam layer, can absorb high frequency vibration through the honeycomb aluminum layer set up on the inboard of trundle, TPE soft rubber layer can eliminate ground impact noise, and the polyurethane foam layer set up in the interlayer of box can absorb noise sound wave, improve the noise reduction effect of trundle.

Description

Technical Field

[0001] This utility model belongs to the field of trolley case technology, specifically relating to a novel silent trolley case. Background Technology

[0002] A rolling suitcase is a type of luggage equipped with a pull handle and wheels. It is widely used due to its convenience. Rolling suitcases are further categorized by the pull handle: single-tube and double-tube handles are available. The handle tubes also come in square and round shapes to facilitate dragging while walking, significantly reducing the burden. Rolling suitcases can be carried by hand or pulled. While the wheels of most rolling suitcases are located at the bottom, modern designs have created a new type of rolling suitcase with a cylindrical shape and wheels entirely encased on the outside. This roller design allows the rolling suitcase to better adapt to different terrains.

[0003] Traditional rolling suitcases have the following drawbacks:

[0004] 1. Significant noise: Hard-material wheels (such as ABS plastic) generate 65-75dB of noise when rolling on hard surfaces, affecting the public environment;

[0005] 2. Vibration transmission: The unbuffered pull rod structure amplifies road vibrations, and the collision of items inside the box generates secondary noise. To address this, we propose a new type of silent pull rod case. Utility Model Content

[0006] The purpose of this invention is to provide a novel silent trolley case to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a novel silent trolley case, comprising a case body, with grooves respectively formed on the four corner surfaces of the bottom of the case body, a base provided at the bottom of the grooves, a connecting rod provided below the base, an installation groove provided at the bottom end of the connecting rod, a caster rotatably connected to the inner side of the installation groove, the inner wheel core of the caster being composed of a carbon fiber bushing, a honeycomb aluminum layer being fitted onto the outer wall of the carbon fiber bushing, and a TPE soft rubber layer being connected to the outer side of the honeycomb aluminum layer.

[0008] Preferably, the outer side of the box is provided with an outer wall layer, the inner side of the box is provided with an inner liner layer, and an interlayer is provided between the outer wall layer and the inner liner layer, the interior of the interlayer being filled with a polyurethane foam layer.

[0009] Preferably, a buffer cavity is provided on the inner side of the base, a damping pad is installed at the top of the inner side of the buffer cavity, a spring is connected below the damping pad, a sliding hole is provided at the bottom of the buffer cavity, a connecting rod is slidably passed through the inner side of the sliding hole, a shock-absorbing pad is installed at the top of the connecting rod, the shock-absorbing pad is fixedly connected to the bottom end of the spring, and a rubber layer is filled on the inner side of the spring.

[0010] Preferably, the surface of the carbon fiber bushing has multiple sets of holes evenly distributed around its circumference, and the surface of the TPE soft rubber layer has spiral guide grooves.

[0011] Preferably, a first bearing is provided at the bottom of the groove, and the top of the base is rotatably connected to the groove through the first bearing.

[0012] Preferably, the mounting groove is provided with second bearings on both sides, and the caster is rotatably connected to the inner wall of the mounting groove through the second bearings.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The honeycomb aluminum layer on the outside of the caster can absorb high-frequency vibrations, the TPE soft rubber layer can eliminate ground impact noise, and the polyurethane foam layer in the box can absorb noise waves, thus improving the noise reduction effect of the caster.

[0015] 2. The vibration damping mechanism of the base and connecting rod reduces the noise generated during the movement of the device.

[0016] 3. By using the first and second bearings, the friction generated by the caster during rotation is reduced, achieving a silent effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the caster structure of this utility model;

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

[0020] Figure 4 This is a schematic diagram of the box structure of this utility model.

[0021] In the diagram: 1. Box body; 101. Outer wall layer; 102. Inner liner layer; 103. Interlayer; 104. Polyurethane foam layer; 2. Groove; 3. First bearing; 4. Base; 5. Connecting rod; 6. Mounting slot; 7. Caster; 701. Carbon fiber bushing; 702. Hole; 703. Honeycomb aluminum layer; 704. TPE soft rubber layer; 705. Spiral guide channel; 8. Second bearing; 9. Buffer chamber; 10. Damping pad; 11. Spring; 12. Shock-absorbing pad; 13. Rubber layer; 14. Sliding hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution: a novel silent trolley case, including a case body 1, with grooves 2 respectively opened on the four corner surfaces of the bottom of the case body 1, a base 4 provided at the bottom of the grooves 2, a connecting rod 5 provided below the base 4, and an installation groove 6 opened at the bottom end of the connecting rod 5. A caster 7 is rotatably connected to the inner side of the installation groove 6. The inner wheel core of the caster 7 is composed of a carbon fiber bushing 701. A honeycomb aluminum layer 703 is installed on the outer wall of the carbon fiber bushing 701, and a TPE soft rubber layer 704 is connected to the outer side of the honeycomb aluminum layer 703.

[0024] Specifically, the outer side of the box 1 is provided with an outer wall layer 101, the inner side of the box 1 is provided with an inner liner layer 102, and an interlayer 103 is provided between the outer wall layer 101 and the inner liner layer 102. The interior of the interlayer 103 is filled with a polyurethane foam layer 104.

[0025] Specifically, a buffer cavity 9 is provided on the inner side of the base 4. A damping pad 10 is installed at the top of the inner side of the buffer cavity 9. A spring 11 is connected below the damping pad 10. A sliding hole 14 is provided at the bottom of the buffer cavity 9. A connecting rod 5 slides through the inner side of the sliding hole 14. A shock-absorbing pad 12 is installed at the top of the connecting rod 5. The shock-absorbing pad 12 is fixedly connected to the bottom end of the spring 11. A rubber layer 13 is filled inside the spring 11.

[0026] Specifically, the surface of the carbon fiber bushing 701 has multiple sets of holes 702 evenly distributed around its circumference, and the surface of the TPE soft rubber layer 704 has spiral guide grooves 705.

[0027] Specifically, the bottom of the groove 2 is provided with a first bearing 3, and the top of the base 4 is rotatably connected to the groove 2 through the first bearing 3.

[0028] Specifically, the mounting groove 6 is provided with second bearings 8 on both sides, and the caster 7 is rotatably connected to the inner wall of the mounting groove 6 through the second bearings 8.

[0029] In this embodiment, the carbon fiber bushing 701 increases the overall structural strength of the caster 7. When the caster 7 walks on the ground, the TPE soft rubber layer 704 eliminates the impact noise from the ground, the honeycomb aluminum layer 703 absorbs high-frequency vibrations, and the spiral guide groove 705 disperses the stress on the outer surface of the caster 7. The vibration generated by the caster 7 is transmitted to the surface of the connecting rod 5, and the connecting rod 5 drives the shock-absorbing pad 12 to compress the spring 11. The damping pad 10 and the rubber layer 13 absorb the force generated by the spring 11, thereby achieving the buffering and shock absorption effect of the device and reducing noise generation. The polyurethane foam layer 104 filled in the inner interlayer 103 of the housing 1 can absorb the sound waves transmitted from the outside, improving the overall noise reduction effect of the device.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel silent trolley case, comprising a case body (1), characterized in that: The bottom of the box (1) has grooves (2) on the four corner surfaces respectively. The bottom of the grooves (2) is provided with a base (4). The bottom of the base (4) is provided with a connecting rod (5). The bottom end of the connecting rod (5) is provided with a mounting groove (6). The inner side of the mounting groove (6) is rotatably connected to a caster (7). The inner wheel core of the caster (7) is composed of a carbon fiber bushing (701). The outer wall of the carbon fiber bushing (701) is fitted with a honeycomb aluminum layer (703). The outer side of the honeycomb aluminum layer (703) is connected with a TPE soft rubber layer (704).

2. The novel silent trolley case according to claim 1, characterized in that: The outer side of the box (1) is provided with an outer wall layer (101), the inner side of the box (1) is provided with an inner liner layer (102), and an interlayer (103) is provided between the outer wall layer (101) and the inner liner layer (102). The interlayer (103) is filled with a polyurethane foam layer (104).

3. A novel silent trolley case according to claim 1, characterized in that: The base (4) has a buffer cavity (9) on its inner side. A damping pad (10) is installed at the top of the inner side of the buffer cavity (9). A spring (11) is connected below the damping pad (10). A sliding hole (14) is opened at the bottom of the buffer cavity (9). A connecting rod (5) slides through the inner side of the sliding hole (14). A shock-absorbing pad (12) is installed at the top of the connecting rod (5). The shock-absorbing pad (12) is fixedly connected to the bottom end of the spring (11). The inner side of the spring (11) is filled with a rubber layer (13).

4. A novel silent trolley case according to claim 1, characterized in that: The surface of the carbon fiber bushing (701) has multiple sets of holes (702) evenly distributed around its circumference, and the surface of the TPE soft rubber layer (704) has spiral guide grooves (705).

5. A novel silent trolley case according to claim 1, characterized in that: The bottom of the groove (2) is provided with a first bearing (3), and the top of the base (4) is rotatably connected to the groove (2) through the first bearing (3).

6. A novel silent trolley case according to claim 1, characterized in that: The mounting groove (6) is provided with second bearings (8) on both sides, and the caster (7) is rotatably connected to the inner wall of the mounting groove (6) through the second bearings (8).

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