Mobile cart and chassis structure thereof

Abstract

The utility model relates to the technical field of mobile carts, and discloses a mobile cart and a chassis structure thereof, the chassis structure comprises a frame and a main support piece arranged in the frame; the frame comprises two main force-bearing pieces and two auxiliary force-bearing pieces, the two auxiliary force-bearing pieces are arranged between the two main force-bearing pieces, the two main force-bearing pieces and the two auxiliary force-bearing pieces are sequentially connected end to end, the main supporting piece is arranged in the frame, one end of the main supporting piece is connected with one main force-bearing piece, and the other end of the main supporting piece is connected with the other auxiliary force-bearing piece. The other end of the main supporting piece is connected with the other main force bearing piece. In the embodiment, the two ends of the main supporting piece are connected with the two main force bearing pieces respectively to jointly form a main bearing structure of the chassis of the mobile cart, so that the force borne by the auxiliary force bearing piece is small, the auxiliary force bearing piece can adopt a sheet metal part form, the lightweight design is realized, and the material use cost is reduced. Meanwhile, the two main force bearing pieces and the two auxiliary force bearing pieces are sequentially connected end to end to form the frame, bending is not needed, and the machining cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of mobile cart technology, and in particular to a mobile cart and its chassis structure. Background Technology

[0002] Mobile trolleys can be used to load display devices. By pushing the trolley by machine or manually, display devices such as monitors, touch screen all-in-ones, and flat-screen TVs can be moved relatively easily.

[0003] Currently, the chassis structure of mobile carts typically includes a frame, which is formed by bending and splicing P-shaped tubes. P-shaped tubes are expensive, and when bending them, it is usually necessary to make notches in the P-shaped tubes to facilitate the bending operation, resulting in high processing costs. Utility Model Content

[0004] The present invention aims to provide a mobile trolley and its chassis structure to solve the technical problem of high material and processing costs of the chassis structure of mobile trolleys in the prior art.

[0005] The present invention addresses its technical problem by providing the following technical solution: a chassis structure for a mobile trolley, comprising:

[0006] The frame includes two main load-bearing members and two secondary load-bearing members arranged at relatively intervals. The two secondary load-bearing members are disposed between the two main load-bearing members, and the two main load-bearing members and the two secondary load-bearing members are connected end-to-end in sequence.

[0007] A main support member is disposed within the frame, with one end of the main support member connected to one of the main load-bearing members and the other end of the main support member connected to another main load-bearing member.

[0008] In this embodiment, the two ends of the main support member are connected to two main load-bearing members respectively, forming the main load-bearing structure of the trolley chassis. Therefore, the secondary load-bearing members bear less force and can be made of sheet metal, achieving a lightweight design and reducing material costs. Furthermore, the two main load-bearing members and the two secondary load-bearing members are connected end-to-end without bending, reducing processing costs.

[0009] In some embodiments, the secondary load-bearing member includes a first side and a first limiting plate and a second limiting plate disposed inside the first side, and the second frame is inserted between the first limiting plate and the second limiting plate.

[0010] In some embodiments, notches are provided at both ends of the main load-bearing member;

[0011] The secondary load-bearing component also includes two second sides, which are respectively connected to the opposite ends of the first side and perpendicular to the first side. The second sides are located at the corresponding notches and abut against the end face of the main load-bearing component facing the notches, and the outer surface of the second side is flush with the outer surface of the main load-bearing component.

[0012] In this embodiment, after the frame is assembled, the end face of the second side abuts against the end face of the main load-bearing component facing the notch, and the outer surface of the second side is flush with the outer surface of the main load-bearing component, which can ensure the overall simplicity of the chassis structure and meet the appearance design requirements of the chassis structure.

[0013] In some embodiments, the secondary load-bearing member further includes a third limiting plate and a fourth limiting plate disposed on the inner side of the second side, and the main load-bearing member is also inserted between the corresponding third limiting plate and fourth limiting plate.

[0014] In this embodiment, by adding a third limiting plate and a fourth limiting plate, the third limiting plate and the fourth limiting plate abut against the upper and lower surfaces of the main load-bearing component, respectively. This provides more welding points for the subsequent welding of the secondary load-bearing component and the main load-bearing component, thereby improving the welding strength between the secondary load-bearing component and the main load-bearing component and improving the stability and reliability of the frame structure.

[0015] In some embodiments, the main load-bearing member is provided with a connector, the connector passing through opposite ends of the main load-bearing member along its thickness direction, and the connector having a mounting hole along its axial direction, the casters of the mobile trolley being able to be installed in the mounting hole.

[0016] In this embodiment, the casters can be directly fixed to the main load-bearing component through the connector, without the need to add an additional caster mounting bracket at the corner of the frame to install the casters. This reduces the number of parts and the welding cost of the caster mounting bracket, thereby reducing the overall cost of the chassis structure.

[0017] In some embodiments, a first connecting plate is further provided on the top surface of the main support member, and the two ends of the main support member are respectively connected to the two main load-bearing members. The first connecting plate is used to connect to the column of the mobile trolley.

[0018] In this embodiment, after the mobile trolley is assembled, the bottom end face of the column abuts against the first connecting plate. The first connecting plate is clamped between the top surface of the main support and the bottom end face of the column, which can prevent the column from directly contacting the main support, thereby dispersing the local pressure of the column on the main support and ensuring the stress stability of the mobile trolley during use.

[0019] In some embodiments, a second connecting plate is further provided on the bottom surface of the main support member;

[0020] The first connecting plate has a first connecting hole, the second connecting plate has a second connecting hole, and the main support member has a connecting hole. The first connecting hole, the connecting hole, and the second connecting hole correspond to each other and are interconnected. The first connecting hole, the connecting hole, and the second connecting hole are used for the connecting members of the column to be inserted sequentially.

[0021] Compared to the existing assembly method of welding hollow sleeves into the connecting holes, this embodiment avoids direct contact between the bottom of the column and the main support component, thus dispersing the local pressure exerted by the column on the main support component. Furthermore, it only requires welding the first connecting plate to the upper surface of the main support component, reducing welding costs. In addition, the second connecting plate helps improve lateral load-bearing capacity and ensures structural stability.

[0022] In some embodiments, at least two secondary support members are also included;

[0023] At least one of the secondary support members is connected between the main support member and one of the secondary load-bearing members, and at least one of the secondary support members is connected between the main support member and the other secondary load-bearing member.

[0024] In this embodiment, by adding secondary support members between the main support member and the two secondary load-bearing members, the structural strength of the chassis structure can be enhanced, the stress stability of the chassis structure can be improved, and the bending deformation of the chassis structure can be prevented.

[0025] In some embodiments, the distance between the main support member and one of the secondary load-bearing members is greater than the distance between the main support member and the other secondary load-bearing member, and the number of secondary support members disposed between the main support member and one of the secondary load-bearing members is greater than the number of secondary support members disposed between the main support member and the other secondary load-bearing member.

[0026] In this embodiment, the distance between the main support member and one of the secondary load-bearing members is small, and a small number of secondary support members are provided between the main support member and the secondary load-bearing member to reduce material and welding costs. The distance between the main support member and the other secondary load-bearing member is large, and a large number of secondary support members are provided between the main support member and the secondary load-bearing member to provide stronger support strength and avoid bending deformation caused by excessive distance.

[0027] In some embodiments, the top of the main load-bearing member is provided with a first protruding edge, and the top of the secondary load-bearing member is provided with a second protruding edge. The first protruding edge and the second protruding edge surround to form a receiving cavity, which is used to receive the cover plate of the mobile trolley.

[0028] In this embodiment, by placing the cover plate over the receiving cavity, the overall simplicity and aesthetics of the chassis structure can be further ensured.

[0029] To address its technical problems, this utility model also provides a mobile trolley, which includes a chassis structure as described in any of the above embodiments; and

[0030] Casters, wherein the casters are disposed at the bottom of the main load-bearing component;

[0031] A cover plate, the cover plate being disposed on the side of the chassis structure opposite to the casters;

[0032] A column, the bottom of which is fixedly connected to the support frame;

[0033] A wall-mounted bracket is installed on the column and is used to mount a display device.

[0034] Since the mobile cart has the chassis structure of any of the above embodiments, it also has the beneficial effects of the above embodiments. For specific beneficial effects, please refer to the above text, which will not be repeated here. Attached Figure Description

[0035] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0036] Figure 1 This is a three-dimensional structural diagram of a mobile cart in one embodiment of the present invention;

[0037] Figure 2 This is a three-dimensional structural diagram of the chassis structure in an embodiment of this utility model;

[0038] Figure 3 This is an exploded structural diagram of the chassis structure in an embodiment of this utility model;

[0039] Figure 4 This is an exploded structural diagram of the secondary load-bearing component and the main load-bearing component in an embodiment of this utility model;

[0040] Figure 5 This is a three-dimensional structural diagram of the auxiliary load-bearing component and the main load-bearing component after assembly in an embodiment of this utility model;

[0041] Figure 6 This is an exploded structural diagram of the secondary load-bearing component and the main load-bearing component from another perspective in an embodiment of this utility model;

[0042] Figure 7 This is an exploded structural diagram of the main support member, the first connecting plate, and the second connecting plate in an embodiment of this utility model.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100. Mobile trolley; 10. Chassis structure; 11. Frame; 111. Main load-bearing component; 1110. Notch; 1113. First protruding edge; 112. Secondary load-bearing component; 1120. First side edge; 1121. First limiting plate; 1122. Second limiting plate; 1123. Second side edge; 1124. Third limiting plate; 1125. Fourth limiting plate; 1126. Second protruding edge; 120. Main support component; 1200. Connecting hole; 121. First connecting plate; 1210. First connecting hole; 122. Second connecting plate; 1220. Second connecting hole; 123. Secondary support component; 13. Connector; 130. Mounting hole; 20. Caster; 30. Cover plate; 40. Column; 50. Wall-mounted bracket; 60. Upright plate; 70. Support plate. Detailed Implementation

[0045] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connected" to another element, it can be directly on the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "left," "right," "upper end," "lower end," "top," and "bottom," etc., used in this specification, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0047] In existing technology, the square frame structure of the mobile cart chassis is formed by bending and splicing P-shaped tubes. P-shaped tubes are expensive to produce, and bending them typically requires notches to be made. Additionally, caster mounting brackets need to be welded to these notches to secure the cart's wheels. The need to create notches in the P-shaped tubes and weld the caster mounting brackets increases the processing and material costs of the frame structure, resulting in a higher overall chassis cost.

[0048] To address the high chassis cost of existing mobile carts, this invention provides a mobile cart and its chassis structure. Since the two ends of the main support member are connected to two main load-bearing members, collectively forming the main load-bearing structure of the mobile cart chassis, the secondary load-bearing members bear less force. These secondary load-bearing members can be made of sheet metal, achieving a lightweight design and reducing material costs. Furthermore, the two main load-bearing members and two secondary load-bearing members are connected end-to-end without bending, reducing processing costs. In addition, after the chassis structure is assembled, the outer surface of the second side can be flush with the outer surface of the main load-bearing members, ensuring a neat appearance. Moreover, a first connecting plate is provided on the top surface of the main support member to prevent direct contact between the column and the crossbeam, thereby dispersing the local pressure of the column on the chassis and ensuring the stability of the mobile cart during use.

[0049] The following will be combined with the appendix Figures 1 to 7 The mobile trolley and its chassis structure provided in the embodiments of this utility model are described in detail.

[0050] Please see Figure 1 This utility model embodiment provides a mobile trolley 100, which is mobile and pushable and includes a chassis structure 10, casters 20, cover plate 30, column 40 and wall bracket 50.

[0051] The chassis structure 10 is roughly rectangular. Casters 20 are mounted on the bottom of the chassis structure 10. Optionally, there are four casters 20, which are respectively mounted at the four corners of the chassis structure 10. The casters 20 provide support for the entire mobile cart 100, and the mobile cart 100 can move relative to the ground by rolling the casters 20 relative to the ground.

[0052] The bottom of the column 40 is fixedly connected to the chassis structure 10. There can be two columns 40, both of which are set in the vertical direction and connected to the chassis structure 10.

[0053] The cover plate 30 is installed on the side of the chassis structure 10 away from the caster 20, that is, the cover plate 30 is installed on top of the chassis structure 10 to ensure the simplicity of the appearance of the chassis structure 10. Optionally, the cover plate 30 has a clearance opening for the column 40 to pass through, and the column 40 connects to the chassis structure 10 after passing through the clearance opening.

[0054] The wall mount bracket 50 is installed on the column 40 and is used to mount display devices such as televisions and tablet computers. Optionally, the wall mount bracket 50 is connected to two columns 40 respectively, and the upper part of the two columns 40 is locked and fixed to the wall mount bracket 50 by bolts.

[0055] Optionally, the mobile cart 100 also includes a stand plate 60 and a tray 70. The two sides of the stand plate 60 are fixedly connected to the two columns 40 by means of screws, rivets, welds, etc. The tray 70 is fixedly connected to the stand plate 60 and is located on one side surface of the stand plate 60. The tray 70 can be used to place accessories such as styluses or remote controls for display devices.

[0056] Please see Figures 2 to 6 In some embodiments, the chassis structure 10 includes a frame 11 and a main support member 120. The main support member 120 is disposed inside the frame 11 and is used to support the column 40 and the load on the column 40.

[0057] The frame 11 includes two main load-bearing members 111 arranged at intervals and two secondary load-bearing members 112 arranged at intervals. The two secondary load-bearing members 112 are disposed between the two main load-bearing members 111. Furthermore, the two main load-bearing members 111 and the two secondary load-bearing members 112 are connected end to end in sequence.

[0058] The main support member 120 is located within the frame, and one end of the main support member 120 is connected to one of the main load-bearing members 111, while the other end of the main support member 120 is connected to another main load-bearing member 111.

[0059] Specifically, the frame 11 includes two parallel main load-bearing members 111 and two parallel secondary load-bearing members 112. Adjacent main load-bearing members 111 and secondary load-bearing members 112 are fixedly connected, so that the two secondary load-bearing members 112 and the two main load-bearing members 111 enclose a generally rectangular frame 11.

[0060] The main load-bearing component 111 can be in the form of a generally tubular or beam-like structure; for example, the main load-bearing component 111 can be a P-shaped tube. The main load-bearing component 111 can be used to mount the casters 20 of the mobile trolley 100.

[0061] Both ends of the main support member 120 are connected to two main load-bearing members 111 respectively. Optionally, both ends of the main support member 120 can be connected to the two main load-bearing members 111 by welding. The main support member 120 and the two main load-bearing members 111 constitute the main load-bearing structure of the chassis. The bottom end of the column 40 is fixedly connected to the main support member 120.

[0062] In this embodiment, since the main support member 120 is connected to the column 40, it bears a large load. The two ends of the main support member 120 are connected to two main load-bearing members 111 respectively, so that the two main load-bearing members 111 also bear a large force. In contrast, the secondary load-bearing member 112 bears a smaller force. Therefore, the secondary load-bearing member 112 can be in the form of sheet metal, thereby realizing the lightweight design of the chassis structure 100 and reducing the material cost.

[0063] Furthermore, compared to the frame 11 structure formed by bending and splicing P-type tubes in the prior art, in this embodiment, two main load-bearing components 111 and two secondary load-bearing components 112 are connected end to end to form the frame 11. Therefore, there is no need to make notches and bend the P-type tubes, which reduces processing steps and processing costs. Moreover, the casters 20 of the mobile trolley 100 can be installed on the main load-bearing components 111, so there is no need to weld additional caster fixing seats to install the casters 20, which reduces the number of parts and welding costs.

[0064] In some embodiments, the secondary load-bearing member 112 includes a first side 1120 and a first limiting plate 1121 and a second limiting plate 1122 disposed on the inner side of the first side 1120 (wherein the inner side refers to the side of the first side 1120 facing the main support member 120), and the main load-bearing member 111 is inserted between the first limiting plate 1121 and the second limiting plate 1122.

[0065] The first side 1120, the first limiting plate 1121, and the second limiting plate 1122 can be integrally formed. The first limiting plate 1121 and the second limiting plate 1122 can be parallel to each other and approximately perpendicular to the first side 1120. A first slot for inserting the main load-bearing member 111 is formed between the first limiting plate 1121 and the second limiting plate 1122. Optionally, the secondary load-bearing member 112 can be bent or stamped to form the first limiting plate 1121 and the second limiting plate 1122.

[0066] During assembly, the two ends of the main load-bearing component 111 are respectively inserted between the corresponding first limiting plate 1121 and second limiting plate 1122. After the insertion is in place, the upper and lower surfaces of the main load-bearing component 111 abut against the first limiting plate 1121 and the second limiting plate 1122 respectively. Then the main load-bearing component 111 and the secondary load-bearing component 112 can be fixedly connected by welding or screwing to form the frame 11 structure.

[0067] like Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the main load-bearing member 111 has notches 1110 at both ends, and the secondary load-bearing member 112 also includes two second sides 1123. The two second sides 1123 are respectively connected to the opposite ends of the first side 1120 and are perpendicular to the first side 1120. The second side 1123 is disposed at the corresponding notch 1110 and abuts against the end face 1111 of the main load-bearing member 111 facing the notch 1110. The outer surface 11230 of the second side 1123 is flush with the outer surface 1122 of the main load-bearing member 111.

[0068] The secondary load-bearing member 112 also includes two second sides 1123, which are perpendicular to the first side 1120. Optionally, the secondary load-bearing member 112 can be bent or stamped to form the two second sides 1123.

[0069] The main load-bearing member 111 has notches 1110 at both ends. The notches 1110 are located at the ends of the main load-bearing member 111 and on the side away from the main support member 120. The position of the notch 1110 corresponds to the position of the corresponding second side 1123. The second side 1123 formed after the secondary load-bearing member 112 is bent can extend to the corresponding notch 1110.

[0070] When assembling the chassis structure 10, the main load-bearing component 111 is inserted into the first slot, and the end face of the second side 1123 abuts against the end face of the main load-bearing component 111 facing the notch 1110, so that the outer surface of the second side 1123 is flush with the outer surface of the main load-bearing component 111. Then, the auxiliary load-bearing component 112 and the main load-bearing component 111 are connected by welding or screwing. This ensures the overall simplicity of the chassis structure 10 and meets the appearance design requirements of the chassis structure 10.

[0071] In some embodiments, the secondary load-bearing member 112 further includes a third limiting plate 1124 and a fourth limiting plate 1125 disposed inside the second side 1123, and the main load-bearing member 111 is also inserted between the corresponding third limiting plate 1124 and fourth limiting plate 1125.

[0072] Specifically, the third limiting plate 1124 and the fourth limiting plate 1125 can be parallel to each other and perpendicular to the second side 1123 respectively. A second slot for inserting the main load-bearing member 111 is formed between the third limiting plate 1124 and the fourth limiting plate 1125. Optionally, the secondary load-bearing member 112 can be bent or stamped to form the third limiting plate 1124 and the fourth limiting plate 1125.

[0073] After the two adjacent secondary load-bearing members 112 and the main load-bearing member 111 are inserted and fitted, the end of the main load-bearing member 111 facing the secondary load-bearing member 112 is not only located between the corresponding first limiting plate 1121 and the second limiting plate 1122, but also between the corresponding second limiting plate 1122 and the fourth limiting plate 1125, so that the upper surface of the main load-bearing member 111 abuts against the first limiting plate 1121 and the third limiting plate 1124 at the same time, and the lower surface of the main load-bearing member 111 abuts against the second limiting plate 1122 and the fourth limiting plate 1125 at the same time.

[0074] By adding a third limiting plate 1124 and a fourth limiting plate 1125, the third limiting plate 1124 and the fourth limiting plate 1125 abut against the upper and lower surfaces of the main load-bearing member 111, respectively. This provides more welding points or bolted connections for the subsequent welding of the secondary load-bearing member 112 and the main load-bearing member 111, thereby improving the welding strength or bolted connection strength between the secondary load-bearing member 112 and the main load-bearing member 111, and enhancing the stability and reliability of the frame 11 structure.

[0075] like Figure 4 and Figure 5 As shown, in some embodiments, a connector 13 is provided on the main load-bearing member 111. The connector 13 can be a fastener such as a bolt or rivet. The casters 20 of the mobile trolley 100 are fixed to the bottom of the main load-bearing member 111 through the connector 13.

[0076] In some embodiments, the connector 13 passes through the opposite ends of the main load-bearing member 111 along its thickness direction, and the connector 13 has a mounting hole 130 along its axial direction, so that the casters 20 of the mobile trolley 100 can be installed in the mounting hole 130.

[0077] Optionally, the mounting hole 130 can be a threaded hole. When installing the caster 20, the connecting end of the caster 20 is screwed into the threaded hole to achieve a fixed connection with the main load-bearing component 111.

[0078] In this embodiment, the caster 20 can be directly fixed to the main load-bearing component 111 through the connector 13, without the need to add an additional caster 20 fixing seat at the corner of the frame 11 to install the caster 20, which reduces the number of parts and the welding cost of the caster 20 fixing seat, and reduces the overall cost of the chassis structure 10.

[0079] Please see Figure 7 In some embodiments, the main support member 120 includes a main support member 120 and a first connecting plate 121 disposed on the top surface of the main support member 120. The first connecting plate 121 is used to connect to the column 40 of the mobile trolley 100.

[0080] like Figure 7 As shown, the main support member 120 can be a hollow square tubular structure. The two ends of the main support member 120 can be fixedly connected to the two main load-bearing members 111 by welding. The first connecting plate 121 can be fixedly connected to the upper surface of the main support member 120 by welding. The bottom end of the column 40 can also be connected to the first connecting plate 121 by welding.

[0081] After the mobile cart 100 is assembled, the bottom end face of the column 40 abuts against the first connecting plate 121. The first connecting plate 121 is clamped between the top surface of the main support member 120 and the bottom end face of the column 40, which can prevent the column 40 from directly contacting the main support member 120, thereby dispersing the local pressure of the column 40 on the main support member 120 and ensuring the stress stability of the mobile cart 100 during use.

[0082] In some embodiments, the main support member 120 further includes a second connecting plate 122 disposed on the bottom surface of the main support member 120. The first connecting plate 121 has a first connecting hole 1210, the second connecting plate 122 has a second connecting hole 1220, and the main support member 120 has a communicating hole 1200. The first connecting hole 1210, the communicating hole 1200 and the second connecting hole 1220 correspond to each other and communicate with each other. The first connecting hole 1210, the communicating hole 1200 and the second connecting hole 1220 are used for the connectors of the column 40 to be inserted sequentially.

[0083] The bottom end of the column 40 is provided with connecting parts such as insert rods (not shown). The number of connecting parts corresponds to the number of the first connecting holes 1210. The second connecting plate 122 can be fixedly connected to the lower surface of the main support member 120 by welding. During assembly, the connecting parts at the bottom of the column 40 are sequentially inserted into the first connecting hole 1210, the connecting hole 1200, and the second connecting hole 1220, and the bottom end face of the column 40 is made to abut against the first connecting plate 121 to complete the installation of the column 40.

[0084] Compared to the existing assembly method of welding a hollow sleeve into the connecting hole 1200, this embodiment avoids direct contact between the bottom of the column 40 and the main support member 120, thereby dispersing the local pressure of the column 40 on the main support member 120. Furthermore, it only requires welding the first connecting plate 121 to the upper surface of the main support member 120, which helps reduce welding costs. In addition, the second connecting plate 122 helps improve lateral load-bearing capacity and ensures structural stability.

[0085] Please refer to the following: Figure 2 In some embodiments, the chassis structure 10 further includes at least two secondary support members 123, at least one secondary support member 123 being connected between the main support member 120 and one of the secondary load-bearing members 112, and at least one secondary support member 123 being connected between the main support member 120 and another secondary load-bearing member 112.

[0086] Specifically, the two ends of the main support member 120 can be fixedly connected to the two main load-bearing members 111 by welding. After assembly, the main support member 120 is perpendicular to the two main load-bearing members 111, and the main support member 120 is parallel to the two auxiliary load-bearing members 112.

[0087] The secondary support member 123 can be a hollow tubular structure, which is vertically arranged between the main support member 120 and the secondary load-bearing member 112. Optionally, the two ends of the secondary support member 123 can be fixedly connected to the main support member 120 and the secondary load-bearing member 112 by welding respectively.

[0088] In this embodiment, by adding secondary support members 123 between the main support member 120 and the two secondary load-bearing members 112, the structural strength of the chassis structure 10 can be enhanced, the stress stability of the chassis structure 10 can be improved, and the bending deformation of the chassis structure 10 can be prevented.

[0089] In some embodiments, the distance between the main support member 120 and one of the secondary load-bearing members 112 is greater than the distance between the main support member 120 and the other secondary load-bearing member 112, which can balance the instability of the center of gravity caused by the wall-mounted bracket 50 carrying heavy objects. The number of secondary support members 123 disposed between the main support member 120 and one of the secondary load-bearing members 112 is greater than the number of secondary support members 123 disposed between the main support member 120 and the other secondary load-bearing member 112.

[0090] Optionally, there are three auxiliary support members 123. The distance between the main support member 120 and one of the auxiliary load-bearing members 112 is small, and one auxiliary support member 123 is provided between the main support member 120 and the auxiliary load-bearing member 112 to reduce material and welding costs. Alternatively, the distance between the main support member 120 and another auxiliary load-bearing member 112 is large, and two auxiliary support members 123 are provided between the main support member 120 and the auxiliary load-bearing member 112 to provide stronger support strength and prevent bending deformation due to excessive distance. Furthermore, because the distance between the main support member 120 and the other auxiliary load-bearing member 112 is large, the overall strength of the chassis structure can be improved by arranging more auxiliary support members 123.

[0091] like Figure 2 As shown, in some embodiments, the main load-bearing member 111 has a first protruding edge 1113 on the side away from the caster 20, and the secondary load-bearing member 112 has a second protruding edge 1126 on the side away from the caster 20. The second protruding edge 1126 and the first protruding edge 1113 surround to form a receiving cavity, which is used to receive the cover plate 30 of the mobile trolley 100.

[0092] Specifically, when the cover plate 30 is installed in the receiving cavity, the first side 1120 and the main support member 120 can abut against the cover plate 30 and provide support for the cover plate 30.

[0093] In this embodiment, by covering the receiving cavity with the cover plate 30, the overall simplicity and aesthetics of the chassis structure 10 can be ensured.

[0094] Optionally, after the cover plate 30 is installed, the top surface of the cover plate 30 is flush with the top surfaces of the second protruding edge 1126 and the first protruding edge 1113, further improving the overall simplicity of the chassis structure 10.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail; although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A chassis structure for a mobile cart, characterized in that, include: The frame (11) includes two main load-bearing members (111) and two secondary load-bearing members (112) arranged at relative intervals. The two secondary load-bearing members (112) are arranged between the two main load-bearing members (111), and the two main load-bearing members (111) and the two secondary load-bearing members (112) are connected end to end in sequence. as well as A main support member (120) is disposed within the frame, and one end of the main support member (120) is connected to one of the main load-bearing members (111), and the other end of the main support member (120) is connected to another main load-bearing member (111).

2. The chassis structure according to claim 1, characterized in that, The secondary load-bearing component (112) includes a first side (1120) and a first limiting plate (1121) and a second limiting plate (1122) disposed inside the first side (1120). The main load-bearing component (111) is inserted between the first limiting plate (1121) and the second limiting plate (1122).

3. The chassis structure according to claim 2, characterized in that, The main load-bearing component (111) has notches (1110) at both ends; The secondary load-bearing member (112) further includes two second side edges (1123), which are respectively connected to the opposite ends of the first side edge (1120) and perpendicular to the first side edge (1120). The second side edge (1123) is located at the corresponding notch (1110) and abuts against the end face of the main load-bearing member (111) facing the notch (1110). The outer surface of the second side edge (1123) is flush with the outer surface of the main load-bearing member (111).

4. The chassis structure according to claim 3, characterized in that, The secondary load-bearing component (112) further includes a third limiting plate (1124) and a fourth limiting plate (1125) disposed on the inner side of the second side (1123), and the main load-bearing component (111) is also inserted between the corresponding third limiting plate (1124) and the fourth limiting plate (1125).

5. The chassis structure according to claim 1, characterized in that, The main load-bearing component (111) is provided with a connector (13), which passes through the two opposite ends of the main load-bearing component (111) along its thickness direction. The connector (13) is provided with a mounting hole (130) along its axial direction, and the casters of the mobile trolley can be installed in the mounting hole (130).

6. The chassis structure according to claim 1, characterized in that, It also includes a first connecting plate (121) disposed on the top surface of the main support member (120), the two ends of the main support member (120) being connected to the two main load-bearing members (111) respectively, and the first connecting plate (121) being used to connect to the column (40) of the mobile trolley.

7. The chassis structure according to claim 6, characterized in that, It also includes a second connecting plate (122) disposed on the bottom surface of the main support member; The first connecting plate (121) has a first connecting hole (1210), the second connecting plate (122) has a second connecting hole (1220), and the main support member (120) has a connecting hole (1200). The first connecting hole (1210), the connecting hole (1200), and the second connecting hole (1220) correspond to each other and are interconnected. The first connecting hole (1210), the connecting hole (1200), and the second connecting hole (1220) are used for the sequential insertion of the connector of the column (40).

8. The chassis structure according to claim 1, characterized in that, It also includes at least two secondary support members (123), at least one of the secondary support members (123) being connected between the main support member (120) and one of the secondary load-bearing members (112), and at least one of the secondary support members (123) being connected between the main support member (120) and the other secondary load-bearing member (112).

9. The chassis structure according to claim 8, characterized in that, The distance between the main support member (120) and one of the secondary load-bearing members (112) is greater than the distance between the main support member (120) and the other secondary load-bearing member (112). The number of secondary support members (123) disposed between the main support member (120) and one of the secondary load-bearing members (112) is greater than the number of secondary support members (123) disposed between the main support member (120) and the other secondary load-bearing member (112).

10. The chassis structure according to claim 1, characterized in that, The top of the main load-bearing member (111) is provided with a first protruding edge (1113), and the top of the secondary load-bearing member (112) is provided with a second protruding edge (1126). The first protruding edge (1113) and the second protruding edge (1126) form a receiving cavity, which is used to receive the cover plate (30) of the mobile trolley.

11. A mobile cart, characterized in that, Including the chassis structure as described in any one of claims 1-10; and Casters (20) are provided at the bottom of the main load-bearing member (111); A cover plate (30) is provided on the side of the chassis structure opposite to the caster (20); A column (40) is fixedly connected to the main support member (120) at its bottom; A wall-mounted bracket (50) is installed on the column (40) and is used to mount a display device.

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