Multi-stage folding type cart device

Abstract

The utility model discloses a multi-stage folding type cart device which comprises a bottom supporting frame body structure which is fixedly connected with a bottom frame base, a transposition opening is formed in one side portion of the bottom frame base, a self-adaptive shifting groove is formed in at least one side portion, perpendicular to the transposition opening, of the bottom frame base, a limiting rod is assembled in the self-adaptive shifting groove in a sliding mode, and the limiting rod is fixedly connected with the bottom supporting frame body structure. The limiting rod extends to correspond to the transposition opening; the bottom end of the back supporting frame body structure is assembled to the bottom frame base in a rotating connection mode, the bottom end of the back supporting frame body structure can conduct transposition through a transposition opening of the bottom frame base, and the limiting rod limits the bottom end of the back supporting frame body structure in a detachable mode based on the self-adaptive shifting groove. The technical problems that in the prior art, a folding cart is complex in framework design, and folding and unfolding operation procedures are tedious and inconvenient are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a trolley frame technical field, specifically, a multistage folding trolley device is provided. BACKGROUND

[0002] At present, as a common handling tool, trolleys are widely used in various production and life fields, especially in warehouse logistics handling or complex outdoor environments, and occupy an increasingly important position.

[0003] In the prior art, when facing complex working environments or storage, the traditional trolley is usually designed with folding function to a certain extent. However, the overall architecture design of the current trolley for realizing the folding function is generally more complex, and the folding and unfolding operation process is more cumbersome and inconvenient, and the overall function practicability and working efficiency is low. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a multistage folding trolley device to solve the technical problems of complex folding trolley architecture design and cumbersome folding and unfolding operation process in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0006] A multistage folding trolley device comprises:

[0007] A bottom support frame structure is fixedly connected with a bottom frame base, one side of the bottom frame base is provided with a transfer port, and at least one side of the bottom frame base perpendicular to the transfer port is provided with a self-adapting displacement slot, a limiting rod is slidably assembled in the self-adapting displacement slot, and the limiting rod extends corresponding to the transfer port;

[0008] A back support frame structure is connected and assembled at the bottom end of the bottom frame base, and the bottom end of the back support frame structure can be transferred through the transfer port of the bottom frame base, and the limiting rod can release the bottom end of the back support frame structure based on the self-adapting displacement slot.

[0009] On the basis of the above technical scheme, the utility model is further described as follows:

[0010] As a further scheme of the utility model,

[0011] The bottom frame base is provided with two groups, and the two groups of bottom frame bases are both provided as vertical plate slot structures, and the two bottom ends of the back support frame structure are respectively and correspondingly connected and assembled in the two groups of bottom frame bases.

[0012] As a further scheme of the utility model,

[0013] A tension spring is respectively installed between the limiting rod and the two sets of the base frame bases;

[0014] When the two sets of tension springs are in their initial state, the limiting rod is in a limiting function state on the bottom end of the back support frame structure.

[0015] As a further aspect of this utility model, it also includes:

[0016] The limiting bracket structure is provided with at least one elastic positioning end, which has a releasable positioning function;

[0017] The adjusting push frame structure has at least one side rod that is slidably mounted on at least one side rod of the back support frame structure via at least one elastic positioning end of the limiting bracket structure.

[0018] As a further embodiment of this utility model,

[0019] The elastic positioning end of the limiting bracket structure is set as a spring-loaded limiting sleeve.

[0020] The spring-loaded limiting sleeve is provided in two sets, and the two sets of spring-loaded limiting sleeves are respectively fixedly assembled on the top two sides of the back support frame structure.

[0021] The two side rods of the adjustment push frame structure are evenly provided with a number of positioning holes, and the two side rods of the adjustment push frame structure are respectively slidably mounted on the two side rods of the back support frame structure through two sets of spring column limiting sleeves. The controllable elastic pin of the spring column limiting sleeve is detachably locked with one of the positioning holes opened on the side rod of the adjustment push frame structure.

[0022] As a further embodiment of this utility model,

[0023] The limiting bracket structure also includes a positioning assembly crossbeam;

[0024] The positioning assembly beam is fixedly assembled between the two sets of spring column limiting sleeves.

[0025] As a further aspect of this utility model, it also includes:

[0026] Both the limiting lock seat structure and the locking adjustment structure are provided in two sets. The two sets of limiting lock seat structures are symmetrically fixedly assembled to the positioning assembly beam, and the two sets of locking adjustment structures are symmetrically inserted and assembled to the positioning assembly beam. The two sets of locking adjustment structures and the two sets of limiting lock seat structures are respectively detachably limited in a one-to-one correspondence. When the locking adjustment structure is in a limited state relative to the limiting lock seat structure, the two sets of locking adjustment structures lock the structure of the storage box.

[0027] As a further embodiment of this utility model,

[0028] Each locking and control structure includes a control body and a transmission indexing rod.

[0029] The two ends of the control body are respectively fixed with a transmission shaft and a limiting protrusion;

[0030] The drive shaft extends through the positioning assembly beam, and the end of the drive shaft away from the control body is fixedly connected to one end of the drive indexing rod.

[0031] The limiting protrusion is detachably limited and is provided on the limiting lock seat structure;

[0032] A locking outer support plate is fixedly connected to one side of the transmission rotation rod, and a locking inner retracting plate is fixedly connected to one side of the storage box structure. When the control body is in a relatively locked position relative to the limiting lock seat structure, the locking outer support plate and the locking inner retracting plate are detachably fastened and limited.

[0033] As a further embodiment of this utility model,

[0034] The locking and adjusting structure also includes a spring and a telescopic sleeve;

[0035] The spring is sleeved and assembled on the outer side of the transmission shaft, and the telescopic sleeve is sleeved and assembled on the outer side of the spring. Both the spring and the telescopic sleeve are located between the positioning assembly beam and the transmission indexing rod.

[0036] As a further embodiment of this utility model,

[0037] The other end of the transmission indexing rod along its extension direction is also fixedly provided with an extension transmission rod. The extension transmission rod extends through the reinforcing crossbeam between the side bars on both sides of the back support frame structure, and a locking outer support plate is fixedly provided on one side of the extension transmission rod.

[0038] This utility model has the following beneficial effects:

[0039] This device can effectively fulfill the intended trolley support function through the cooperation of the back support frame structure and the bottom support frame structure. At the same time, the back support frame structure and the bottom support frame structure can be further used in conjunction with the limiting bracket structure and the adjusting push frame structure to effectively realize the flexible trolley extension and retraction function, which improves the overall application convenience and operation efficiency. In addition, the limiting lock seat structure and the locking adjustment structure can be used to achieve stable placement and positioning of the storage box structure, which significantly improves the stability of the trolley function and enhances the overall practicality. Attached Figure Description

[0040] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The structures, proportions, sizes, etc., drawn in this specification are only used to complement the content disclosed in the specification, so that those skilled in the art can understand and read them. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0041] Figure 1 This is one of the overall application state structural diagrams of the multi-stage folding trolley device provided in the embodiments of this utility model.

[0042] Figure 2 A schematic diagram of the overall axonometric structure of the multi-stage unfolding folding trolley device provided in this embodiment of the present invention, corresponding to the front position.

[0043] Figure 3 A schematic diagram of the overall axonometric structure of the multi-stage unfolding folding trolley device provided in this embodiment of the utility model, corresponding to the back side position.

[0044] Figure 4 The multi-stage folding trolley device provided in this embodiment of the utility model is Figure 3 Enlarged view of the local structure at point A in the middle.

[0045] Figure 5 A schematic diagram of the split isometric structure of the multi-stage folding trolley device provided in this embodiment of the present invention, corresponding to the front position.

[0046] Figure 6 The second schematic diagram shows the overall application state structure of the multi-stage folding trolley device provided in this embodiment of the utility model.

[0047] Figure 7 The multi-stage folding trolley device provided in this embodiment of the utility model is Figure 6 Enlarged view of the local structure at point B.

[0048] Figure 8 The third schematic diagram of the overall application state structure of the multi-stage folding trolley device provided in this embodiment of the utility model.

[0049] Figure 9 A schematic diagram of the split isometric structure of the multi-stage folding trolley device provided in this embodiment of the present invention, corresponding to the back side position.

[0050] Figure 10 The fourth schematic diagram of the overall application state structure of the multi-stage folding trolley device provided in this embodiment of the utility model.

[0051] Figure 11 One of the schematic diagrams of the application state structure of the multi-stage unfolding folding trolley device provided in the embodiments of this utility model, corresponding to the locking and control structure.

[0052] Figure 12 The second schematic diagram of the multi-stage unfolding and folding trolley device provided in this embodiment of the utility model corresponds to the application state structure of the locking and adjusting structure.

[0053] The attached diagram lists the components represented by each number as follows:

[0054] Back support frame structure 1;

[0055] Bottom support frame structure 2: Bottom frame base 21, self-adaptive displacement groove 22, limiting rod 23, tension spring 24;

[0056] Limiting bracket structure 3: spring column limiting sleeve 31, positioning assembly crossbeam 32;

[0057] Adjustment pusher structure 4;

[0058] Limit lock seat structure 5;

[0059] Locking and adjusting structure 6: Adjusting body 61, transmission shaft rod 62, limiting protrusion 63, transmission indexing rod 64, spring 65, telescopic sleeve 66, extension transmission rod 67, locking outer support plate 68.

[0060] Storage box structure 7, locking inner retractable plate 71. Detailed Implementation

[0061] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0062] The terms "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

[0063] like Figures 1 to 12As shown, this utility model embodiment provides a multi-stage folding trolley device, including a back support frame structure 1, a bottom support frame structure 2, a limiting bracket structure 3, an adjusting push frame structure 4, a limiting lock seat structure 5, a locking adjustment structure 6, and a storage box structure 7. The back support frame structure 1 and the bottom support frame structure 2 work together to effectively complete the intended trolley support function. Simultaneously, the back support frame structure 1 and the bottom support frame structure 2, in conjunction with the limiting bracket structure 3 and the adjusting push frame structure 4, effectively achieve flexible trolley folding and unfolding, improving overall application convenience and work efficiency. Furthermore, the limiting lock seat structure 5, in conjunction with the locking adjustment structure 6, ensures stable positioning of the storage box structure 7, significantly improving the stability of the trolley function and enhancing its overall practicality. Specific settings are as follows:

[0064] Please refer to Figures 2 to 5 , Figure 7 and Figure 8 The back support frame structure 1 and the bottom support frame structure 2 can serve as the back support and bottom support foundation of the overall trolley frame, respectively. Two sets of bottom frame bases 21 are fixedly connected to the top of one side of the bottom support frame structure 2, and the top of one side of the bottom support frame structure 2 is connected to the bottom end of the back support frame structure 1 via the two sets of bottom frame bases 21. Specifically, both sets of bottom frame bases 21 are configured as vertical plate groove structures, and the bottom ends of both sides of the back support frame structure 1 are respectively connected to the interior of the two sets of bottom frame bases 21. Both sets of bottom frame bases 21 have adaptive displacement grooves 22 corresponding to the sides, and the adaptive displacement grooves 22 of both sets of bottom frame bases 21 are slidably fitted with limiting rods 23, which cooperate with the front vertical plate of the bottom frame base 21 to achieve the desired effect when the trolley is in the unfolded state. The bottom end of the back support frame structure 1 is limited, and the limiting rod 23 can be moved and released from the limiting effect on the bottom end of the back support frame structure 1 based on the adaptive displacement groove 22. This allows the back support frame structure 1 to complete the rotation and folding function relative to the bottom support frame structure 2. The sides of the two sets of base frames 21 are also positioned with one end of the tension spring 24. The other end of the two sets of tension spring 24 is positioned and connected to the limiting rod 23. When the two sets of tension spring 24 are in the initial state, the limiting rod 23 is in the limiting function state of the bottom end of the back support frame structure 1. This allows the rotation and folding function to be completed more conveniently by stepping on the limiting rod 23 while maintaining a stable extended state to meet the predetermined handling function, thus improving the convenience of application and work efficiency.

[0065] Please refer to Figure 2 and Figure 6The limiting bracket structure 3 includes a spring-loaded limiting sleeve 31 and a positioning assembly crossbeam 32; wherein, two sets of spring-loaded limiting sleeves 31 are provided, and the two sets of spring-loaded limiting sleeves 31 are respectively fixedly assembled to the top ends of both sides of the back support frame structure 1; the two side rods of the adjusting push frame structure 4 are evenly provided with a plurality of positioning holes, and the two side rods of the adjusting push frame structure 4 are respectively slidably assembled to the two side rods of the back support frame structure 1 through the two sets of spring-loaded limiting sleeves 31. The controllable elastic pin of the sleeve 31 is detachably locked to one of the positioning holes on the side rod of the adjustment push frame structure 4, so that the adjustment push frame structure 4 can achieve further positioning extension or retraction based on the back support frame structure 1; the positioning assembly beam 32 is fixedly assembled between the two sets of elastic column limiting sleeves 31, so as to effectively reinforce the structure, and at the same time, the positioning assembly beam 32 serves as the assembly basis for the limiting lock seat structure 5 and the locking adjustment structure 6 to realize the adjustment and locking function.

[0066] Please refer to Figures 9 to 12 The limiting lock seat structure 5 and the locking adjustment structure 6 are each provided in two sets, and the two sets of the limiting lock seat structure 5 are symmetrically fixedly assembled to the positioning assembly beam 32. The two sets of the locking adjustment structure 6 are symmetrically installed through the positioning assembly beam 32, and the two sets of the locking adjustment structure 6 and the two sets of the limiting lock seat structure 5 are respectively detachably limited in a one-to-one correspondence. At this time, the two sets of locking adjustment structures 6 can lock the storage box structure 7.

[0067] Specifically, each locking adjustment structure 6 includes an adjustment body 61, a transmission indexing rod 64, a spring 65, and a telescopic sleeve 66; wherein, a transmission shaft 62 and a limiting protrusion 63 are respectively fixedly connected to both ends of the adjustment body 61; the transmission shaft 62 extends through the positioning assembly beam 32, and the end of the transmission shaft 62 away from the adjustment body 61 is fixedly connected to one end of the transmission indexing rod 64; the limiting protrusion 63 is detachably limited and positioned on the limiting lock seat structure 5; the spring 65 is sleeved and assembled on the outer side of the transmission shaft 62, and the telescopic sleeve 66 is sleeved and assembled on the outer side of the spring 65, and the spring 65 and the... The telescopic sleeves 66 are all located between the positioning assembly beam 32 and the transmission rotation rod 64; this allows the control body 61 to effectively lock or unlock relative to the limiting lock seat structure 5 through the lifting and rotation action. A locking outer support plate 68 is fixedly connected to one side of the transmission rotation rod 64, and a locking inner retracting plate 71 is fixedly connected to one side of the storage box structure 7. When the control body 61 is in the locked position relative to the limiting lock seat structure 5, the locking outer support plate 68 and the locking inner retracting plate 71 are in a separable snap-fit ​​limiting state, thereby achieving stable limiting of the storage box structure 7 based on the locking and snap-fit ​​action, improving the stability and practicality of the trolley function.

[0068] As a preferred embodiment, the other end of the transmission rotation rod 64 along its extension direction is also fixedly provided with an extension transmission rod 67. The extension transmission rod 67 extends through the reinforcing crossbeam between the side rods on both sides of the back support frame structure 1, and a locking outer support plate 68 is fixedly provided on one side of the extension transmission rod 67. This allows the extension transmission rod 67 to flexibly adapt to the structural design of the reinforcing crossbeam and other structures to complete the intermittent fastening and limiting, further improving the overall stability of the stacking box structure 7.

[0069] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A multi-stage folding trolley device, characterized in that, include: The base support frame structure is fixedly provided with a base frame base. One side of the base frame base is provided with a rotation opening, and at least one side of the base frame base perpendicular to the direction of the rotation opening is provided with an adaptive displacement groove. A limiting rod is slidably assembled inside the adaptive displacement groove, and the limiting rod extends to correspond to the rotation opening. The back support frame structure has its bottom end connected to the base frame, and the bottom end of the back support frame structure can be rotated through the rotation port of the base frame. The limiting rod can release the limiting position of the bottom end of the back support frame structure based on the adaptive displacement groove.

2. The multi-stage folding trolley device according to claim 1, characterized in that, The base frame is provided in two sets, and both sets of the base frame are configured as vertical plate groove structures. The two bottom ends of the back support frame structure are respectively connected to the interior of the two sets of base frame.

3. The multi-stage folding trolley device according to claim 2, characterized in that, A tension spring is respectively installed between the limiting rod and the two sets of the base frame bases; When the two sets of tension springs are in their initial state, the limiting rod is in a limiting function state on the bottom end of the back support frame structure.

4. The multi-stage folding trolley device according to claim 2, characterized in that, Also includes: The limiting bracket structure is provided with at least one elastic positioning end, which has a releasable positioning function; The adjusting push frame structure has at least one side rod that is slidably mounted on at least one side rod of the back support frame structure via at least one elastic positioning end of the limiting bracket structure.

5. The multi-stage folding trolley device according to claim 4, characterized in that, The elastic positioning end of the limiting bracket structure is set as a spring-loaded limiting sleeve. The spring-loaded limiting sleeve is provided in two sets, and the two sets of spring-loaded limiting sleeves are respectively fixedly assembled on the top two sides of the back support frame structure. The two side rods of the adjustment push frame structure are evenly provided with a number of positioning holes, and the two side rods of the adjustment push frame structure are respectively slidably mounted on the two side rods of the back support frame structure through two sets of spring column limiting sleeves. The controllable elastic pin of the spring column limiting sleeve is detachably locked with one of the positioning holes opened on the side rod of the adjustment push frame structure.

6. The multi-stage folding trolley device according to claim 5, characterized in that, The limiting bracket structure also includes a positioning assembly crossbeam; The positioning assembly beam is fixedly assembled between the two sets of spring column limiting sleeves.

7. The multi-stage folding trolley device according to claim 6, characterized in that, Also includes: Both the limiting lock seat structure and the locking adjustment structure are provided in two sets. The two sets of limiting lock seat structures are symmetrically fixedly assembled to the positioning assembly beam, and the two sets of locking adjustment structures are symmetrically inserted and assembled to the positioning assembly beam. The two sets of locking adjustment structures and the two sets of limiting lock seat structures are respectively detachably limited in a one-to-one correspondence. When the locking adjustment structure is in a limited state relative to the limiting lock seat structure, the two sets of locking adjustment structures lock the structure of the storage box.

8. The multi-stage folding trolley device according to claim 7, characterized in that, Each locking and control structure includes a control body and a transmission indexing rod. The two ends of the control body are respectively fixed with a transmission shaft and a limiting protrusion; The drive shaft extends through the positioning assembly beam, and the end of the drive shaft away from the control body is fixedly connected to one end of the drive indexing rod. The limiting protrusion is detachably limited and is provided on the limiting lock seat structure; A locking outer support plate is fixedly connected to one side of the transmission rotation rod, and a locking inner retracting plate is fixedly connected to one side of the storage box structure. When the control body is in a relatively locked position relative to the limiting lock seat structure, the locking outer support plate and the locking inner retracting plate are detachably fastened and limited.

9. The multi-stage folding trolley device according to claim 8, characterized in that, The locking and adjusting structure also includes a spring and a telescopic sleeve; The spring is sleeved and assembled on the outer side of the transmission shaft, and the telescopic sleeve is sleeved and assembled on the outer side of the spring. Both the spring and the telescopic sleeve are located between the positioning assembly beam and the transmission indexing rod.

10. The multi-stage folding trolley device according to claim 8, characterized in that, The other end of the transmission indexing rod along its extension direction is also fixedly provided with an extension transmission rod. The extension transmission rod extends through the reinforcing crossbeam between the side bars on both sides of the back support frame structure, and a locking outer support plate is fixedly provided on one side of the extension transmission rod.

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