A trolley case base

Abstract

The present application relates to the technical field of luggage, and relates to a trolley case base, which comprises a body and four corner-attached casters connected with the body, the body comprises a chassis and a trolley sleeve, the chassis and the trolley sleeve are integrally formed by aluminum material, the chassis comprises a frame surrounding periphery and a bottom support arranged in the frame, a through slot is formed in the bottom surface of the frame, a gas bag I is arranged in the bottom support, and a gas bag II is arranged in the through slot, and the gas bag I and the gas bag II are filled with helium. The chassis and the trolley sleeve are integrally formed by aluminum material, so that the trolley and the chassis are formed as a whole, the installation of subsequent processes is facilitated, the structural strength of the trolley is greatly improved, and the possibility of breakage of the connection between the trolley and the chassis when the trolley is used to pull the luggage is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of luggage, more particularly, it relates to a trolley case base. BACKGROUND

[0002] Trolley case is a necessary item for travel and outing in life, it has a large capacity to place items, and the case bottom has wheels, and the case body has a trolley, so that the user can freely drag the case body through the trolley, which is convenient to carry and saves time and effort.

[0003] In order to meet the requirement of the structure of the trolley case on the market, the weight of the trolley case itself accounts for a large proportion in the use process, in order to reduce the weight, for example, the trolley case disclosed in publication No. CN102754986B removes the frame in the case body, and adopts a more lightweight material to reduce the weight.

[0004] After removing the frame in the above-mentioned prior art, the components supporting the weight of the case body all fall on the chassis, the structural strength of the chassis of the prior art cannot meet the requirement of the trolley case being pulled and sliding on the cement road. Since the chassis is made of plastic material, in order to ensure that it has structural strength, the weight of the chassis will increase, for example, the trolley case base disclosed in publication No. CN205547722U installs metal reinforcing strips on the base to provide structural strength, but the structural strength is still not ideal, and the metal reinforcing strips increase the weight of the base.

[0005] Importantly, the strength of the installation place of the above-mentioned two prior arts for the trolley is not high,

[0006] When the trolley pulls the load of the case body, the installation place of the trolley and the chassis is prone to local cracking, and in order to meet the further support of the case body by the casters, the end face of the existing casters will have an upward extending edge part, which has a large material loss. SUMMARY

[0007] In view of the deficiencies of the prior art, the purpose of the present application is to provide a trolley case base which has reasonable, simple, practical, lightweight and high structural strength.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0009] A trolley case base, comprising a body and a caster connected to four corners of the body, the body comprising a chassis and a trolley sleeve, the chassis and the trolley sleeve being integrally formed from aluminum material,

[0010] The chassis comprises a frame surrounding the periphery and a bottom support arranged in the frame, a through slot is formed in the bottom surface of the frame,

[0011] The bottom support is provided with a gas bag 1, and the through slot is provided with a gas bag 2, and the gas bag 1 and the gas bag 2 are filled with helium.

[0012] The bottom support comprises a plate body and a plurality of support strips, the support strips are in a long strip shape, the support strips are hollow structures, the gas bag 1 is arranged in the support strips, and one end of the gas bag 1 is connected to each other through one of the gas bag 2,

[0013] A through hole is formed in the groove wall of the through slot with the gas bag 2, and a gas nozzle is arranged on the gas bag 2 and penetrates the through hole.

[0014] The adjacent two gas bags 2 are connected through a pipe body, the pipe body is curved in an arc shape, and the pipe body is arranged at the four top corners of the through slot.

[0015] A plurality of holes are formed in the plate body and penetrate the plate body.

[0016] The through slot is detachably connected with a plug strip, the plug strip is in interference fit with the through slot, a plurality of connecting holes are formed in the plug body,

[0017] A threaded hole is formed in the groove wall of the through slot and communicates with the connecting hole, and a pin rod is arranged in the threaded hole and abuts against the connecting hole.

[0018] The four top corners of the frame are provided with a connecting part for connecting the casters, three insertion interfaces are formed in the connecting part, the end of the caster is fixed with an insertion plate for detachable connection with the connecting part, and an insertion part is arranged on the end surface of the insertion plate and extends into the insertion interface.

[0019] The insertion part is formed by digging three notches in the corresponding positions of the insertion plate and bending the roots of the notches upward.

[0020] Compared with the prior art, the present application has the following advantages:

[0021] The bottom disc and the pull rod sleeve are integrally formed by aluminum material, so that the pull rod and the bottom disc are formed as a whole, which facilitates the installation of the subsequent process and greatly improves the structural strength of the pull rod, thereby avoiding the possibility of breaking the connection between the pull rod and the bottom disc when pulling the luggage case.

[0022] The bottom disc made of aluminum material also facilitates the installation of the casters, and the casters and the bottom disc are installed in the form of insertion buckles, which facilitates installation and disassembly.

[0023] The gas bag filled with helium can lift the bottom disc to some extent and reduce the weight of the bottom disc. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 is a schematic view of the explosion in the first direction of the present application;

[0025] Fig. 2 is a schematic view of the explosion in the second direction of the present application;

[0026] Fig. 3 is a schematic view of the combination of the present application;

[0027] Fig. 4 is a schematic view of the structure of the plugboard.

[0028] Chassis 1, pull rod sleeve 2, limiting hole 20, frame 11, bottom support 3, connecting part 12, plug-in interface 120, plugboard 4, plug-in part 41, plate body 31, support strip 32, through slot 10, air bag one 5, air bag two 6, air nozzle 61, hole type 30, pipe body 50, plug strip 7, pin rod 8. DETAILED DESCRIPTION

[0029] Reference Figs. 1 to 4 Further illustrate the embodiments of the present application.

[0030] The specific structure of the present embodiment: including the body and the caster connected to the four corners of the body, the body includes chassis 1 and pull rod sleeve 2, and the chassis 1 and the pull rod sleeve 2 are integrally formed of aluminum material. The pull rod sleeve 2 is limited by a hole, and the pull rod sleeve 2 is an outer rod in the pull rod assembly, and the inner rod can be directly inserted into the pull rod sleeve 2 for installation, realizing the combined installation of the pull rod.

[0031] The chassis 1 includes a frame 11 surrounding the four corners and a bottom support 3 placed in the frame 11, and a through slot 10 is formed on the bottom surface of the frame 11.

[0032] The frame 11 has a connecting part 12 for connecting the caster at the four corners, and three plug-in interfaces 120 are formed on the connecting part 12,

[0033] The caster is a common flat-top universal wheel on the market, which is prior art and not embodied in the drawings. The plugboard 4 is fixed on the flat top of the caster, and three notches are dug on the end face of the plugboard 4, and the root part is bent upward to form a plug-in part 41. When installing the caster, the plug-in part 41 is inserted into the plug-in interface 120, and finally the plug-in part 41 is hung on the plug-in interface to realize the installation of the caster. The plug-in part 41 corresponds to three plug-in interfaces 120, and three plug-in parts 41 are provided, and the three plug-in parts 41 are directed in the same direction.

[0034] In order to cooperate with the installation of the caster, there are also three holes on the bottom of the shell of the pull rod box corresponding to the three plug-in interfaces 120, which facilitates the insertion of the plug-in part 41.

[0035] The bottom support 3 comprises a plate body 31 and five supporting strips 32, and a plurality of holes 30 are formed in the plate body 31. The holes 30 are used to reduce the weight of the plate body 31. The supporting strips 32 are long and rectangular in shape, hollow in the middle, and circular in the center. The air bag 5 is installed in the center hole.

[0036] The air bag 2 6 is installed in the through groove 10, and the air bag 1 5 and the air bag 2 6 are filled with helium. Helium is lighter than air, which will bring the air bag 1 5 and the air bag 2 6 upward, and the upward buoyancy can carry the bottom plate 1 upward, thereby reducing the influence of the weight of the box on the bottom plate 1. Generally, the storage time of one charge of helium is one month, thereby ensuring the portability, and it can be charged before going out.

[0037] One end of the air bag in the supporting strip 32 is connected to the other air bag 2 6, and the groove wall of the through groove 10 with the air bag 2 6 is provided with a through hole 100 connected thereto. The air bag 2 6 is provided with an air nozzle penetrating the through hole. The adjacent two air bags 2 6 are connected through the pipe body 50, which is curved and arc-shaped. The pipe body 50 is arranged at the four top corners of the through groove 10. The pipe body 50 is made of the same material as the air bag.

[0038] The through groove 10 is detachably connected with the plug strip 7, and the plug strip 7 is in interference fit with the through groove 10. A plurality of connecting holes are formed in the plug body, and a plurality of threaded holes are formed in the groove wall of the through groove 10 corresponding to the connecting holes. The threaded holes are provided with a pin 8 which is in abutment with the connecting hole 70. The pin 8 is made of plastic, and the end of the pin 8 has a cross slot.

[0039] The plug strip 7 can ensure the stability of the air bag 2 6 in the through groove 10. The plug strip 7 has a cavity, and the plug strip 7 is made of plastic and filled with aerogel in the cavity. The weight of the plug body is reduced by the aerogel. When the plug strip 7 is installed in the through groove 10, the cross section of the plug strip 7 is trapezoidal, so that the plug strip 7 is inserted into the through groove 10 more tightly, thereby achieving interference fit. Finally, the plug strip 7 and the through groove 10 are further fixed by the pin 8 to ensure the stability of the installation.

[0040] The forming process of the base is as follows:

[0041] Step 1: The frame 11 and the pull rod outer sleeve of the bottom plate 1 are integrally formed by 3D printing of aluminum material.

[0042] Step 2: The plate body 31 is punched, and then the five supporting strips 32 and the plate body 31 are welded and fixed.

[0043] Step 3: The bottom support 3 and the frame 11 are welded and fixed.

[0044] Step 4, the air bag one 5 is inserted into the center hole of the support strip 32, and then the air bag two 6 is inserted into the through slot 10,

[0045] Step 5, the air nozzle is filled with helium by the helium-filled tank, so that the air bag one 5 and the air bag two 6 are inflated at the same time and pressed against the inner wall of the center hole of the support strip 32 and the through slot 10;

[0046] Step 6, the plug strip 7 is inserted into the opening of the through slot 10 and in contact with the air bag two 6, and then the pin 8 is screwed into the threaded hole on the outside of the through slot 10 and connected with the plug strip 7;

[0047] Step 7, the caster and the frame 11 are inserted.

[0048] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any change and replacement within the technical solution range of the present application should be included in the protection scope of the present application.

Claims

1. A suitcase base, comprising a body and casters connected to the four corners of the body, characterized in that: The main body includes a chassis (1) and a tie rod sleeve (2), which are integrally formed from aluminum material. The chassis (1) includes a frame (11) surrounding the chassis and a base (3) placed inside the frame (11). A through groove (10) is opened on the bottom surface of the frame (11). The base (3) is provided with an airbag (5), and the through groove (10) is provided with an airbag (6). Both the airbag (5) and the airbag (6) are filled with helium. The base (3) includes a plate (31) and several support strips (32). The support strips (32) are long and have a hollow structure inside. The airbag (5) is placed on the support. In the strip (32), one end of each of the airbags is connected to the other through one of the airbags (6). The groove wall of the groove (10) of the airbag (6) is provided with a through hole and connected thereto. The airbag (6) is provided with an air nozzle that passes through the through hole. A plug strip (7) is detachably connected to the through groove (10). The plug strip (7) and the through groove (10) are interference-fitted. Several connection holes are provided on the plug body. The groove (10) has a threaded hole on its groove wall corresponding to the connecting hole, and a pin (8) is provided on the threaded hole to connect with the connecting hole.

2. The suitcase base according to claim 1, characterized in that: The two adjacent airbags (6) are connected by a tube (50), which is curved in an arc shape and is placed at the four corners of the through groove (10).

3. The suitcase base according to claim 2, characterized in that: The plate (31) has several holes (30) that penetrate its body.

4. The suitcase base according to claim 2, characterized in that: The four corners of the frame (11) are provided with connecting parts (12) for connecting casters. Three plug-in interfaces (120) are provided on the connecting parts (12). The end of the caster is fixed with a plug plate (4) for detachable connection with the connecting parts (12). The end face of the plug plate (4) is provided with a plug-in part (41) for extending into the plug-in interface (120).

5. A suitcase base according to claim 4, characterized in that: The insertion part (41) is formed by digging three notches at the corresponding positions on the insertion plate (4) and then bending the root upwards.

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