Folding transport vehicle
Through innovative design of the uprights, base frame, and side frames, combined with articulated and sliding structures, the problem of increased height after folding of the folding transport vehicle has been solved, achieving convenient packaging and transportation.
Patent Information
- Application Number
- CN202520286707.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-02-21
AI Technical Summary
Existing folding transport vehicles increase in height when folded, affecting packaging and transportation efficiency.
The design employs several uprights with rollers at the bottom, a base frame, a first side frame, and a second side frame. Combined with tie rods, a central linkage assembly, and cross linkages, the frame is folded through a hinged and sliding structure, ensuring that the height remains essentially unchanged in both the unfolded and folded states.
The frame height remains essentially unchanged after folding, reducing the frame size and making it easier to pack and transport.
Smart Images
Figure CN223618758U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of transport vehicles, and more particularly to a folding transport vehicle. Background Technology
[0002] Folding transport vehicles, as a convenient means of transportation, are widely used in daily life.
[0003] Compared to traditional transport vehicles, the main advantage of folding transport vehicles is that they can be folded flat or in a bundle shape, thereby reducing the volume of the vehicle body after folding, which is beneficial for packaging and transportation.
[0004] However, some folding transport vehicles in related technologies use folding linkage mechanisms that cause the vehicle body to be taller when folded compared to when unfolded, which is not conducive to packaging and transportation, and therefore needs to be improved. Utility Model Content
[0005] In order to solve at least one of the technical problems mentioned in the background art, the purpose of this application is to provide a folding transport vehicle.
[0006] To achieve the above objectives, this application provides the following technical solution.
[0007] A folding transport vehicle, comprising:
[0008] Several columns with rollers at the bottom;
[0009] The base frame is hinged between the columns and can be folded and stowed at least in a first direction;
[0010] Two first side frames arranged opposite each other along a first direction;
[0011] Two second side frames are arranged opposite each other along a second direction and both can be folded and retracted in a first direction; wherein the first direction is perpendicular to the second direction; the second side frame includes a tie rod, a central connecting rod assembly, and two first cross connecting rods respectively disposed on both sides of the central connecting rod assembly;
[0012] The tie rod is vertically arranged and its lower end is hinged to the base frame;
[0013] The connecting rod assembly includes two second cross links arranged sequentially along a first direction; both second cross links are vertically telescopic and foldable; the two ends of the two second cross links on the side closest to each other are hinged to each other to form a first hinge point and a second hinge point located below the first hinge point, wherein the first hinge point is positioned on the pull rod, and the second hinge point can move vertically relative to the pull rod; the two ends of the two second cross links on the side furthest from each other are respectively hinged to the two ends of the first side of the first cross link; the two ends of the second side of the first cross link, the upper one is hinged to the column, and the lower one is hinged to the column and can slide vertically relative to the column.
[0014] As an optional embodiment of this application, the pull rod is provided with a groove extending along the length of the pull rod, and the second hinge point includes a hinge shaft, which passes through the groove and can slide vertically within the groove.
[0015] As an optional embodiment of this application, the two ends of the two second cross links forming the second hinge point are respectively located on the inner and outer sides of the tie rod.
[0016] As an optional embodiment of this application, the second hinge point is independent of the pull rod, and the two ends of the two second cross links forming the second hinge point are both located on the same side of the pull rod.
[0017] As an optional embodiment of this application, the column is provided with a sliding sleeve that can slide vertically along the column, and the lower end of the second side of the first cross link is hinged to the sliding sleeve.
[0018] As an optional embodiment of this application, the base frame includes two bottom frames arranged sequentially along a first direction and hinged to each other; the ends of the two bottom frames that are far apart from each other are hinged to two columns on the same side; the lower end of the pull rod is hinged to one of the bottom frames at the hinge point between the two bottom frames; the bottom frame includes two frame bodies arranged sequentially along the first direction and hinged to each other at their ends, wherein, in the unfolded state, the hinged ends of the two frame bodies abut against each other to restrict the two frame bodies from flipping downward.
[0019] As an optional embodiment of this application, the first side frame can be folded and retracted along the second direction, and the base frame can also be folded and retracted along the second direction.
[0020] As an optional embodiment of this application: the first side frame includes a third cross link that can be folded and retracted along a second direction; of the two ends of the third cross link near the column, the upper end is hinged to the column, and the lower end is hinged to the column and can slide vertically relative to the column.
[0021] As an optional embodiment of this application, the base frame includes two X-shaped folding frames arranged sequentially along a first direction; the X-shaped folding frame includes a connecting seat and four base rods with their first ends hinged to the connecting seat; wherein the second ends of two base rods are respectively hinged to two uprights on the same side, and the second ends of the other two base rods are respectively hinged to the bottom of two tie rods.
[0022] As an optional embodiment of this application, the first side frame includes one or more crossbeams, and two adjacent columns along the second direction are fixed together by the crossbeams.
[0023] Compared with the prior art, this application has the following advantages:
[0024] The central linkage assembly provided in this application ensures that the height of the entire frame remains essentially the same after the transport vehicle is folded compared to its height in the unfolded state, thereby reducing the volume of the folded frame and facilitating its packaging and transportation.
[0025] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description
[0026] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, in which:
[0027] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.
[0028] Figure 1 Schematic diagram of the structure of the flattened, folding transport vehicle provided in this application in its unfolded state. Figure 1 ;
[0029] Figure 2 for Figure 1 The main view;
[0030] Figure 3 For this application Figure 1 The diagram shown illustrates the structure of the transport vehicle during its folding process.
[0031] Figure 4 For this application Figure 1 The diagram shows the structure of the transport vehicle in its folded state.
[0032] Figure 5 Schematic diagram of the structure of the flattened, folding transport vehicle provided in this application in its unfolded state. Figure 2 ;
[0033] Figure 6 Schematic diagram of the bundle-folding transport vehicle provided in this application in its unfolded state. Figure 1 ;
[0034] Figure 7 for Figure 6 The main view;
[0035] Figure 8 for Figure 6 The diagram shown illustrates the structure of the transport vehicle during its folding process.
[0036] Figure 9 for Figure 6 The diagram shows the structure of the transport vehicle in its folded state.
[0037] Figure 10 Schematic diagram of the bundle-folding transport vehicle provided in this application in its unfolded state. Figure 2 .
[0038] Explanation of the labels in the diagram:
[0039] R1, first hinge point; R2, second hinge point;
[0040] 1. First side frame; 11. Crossbeam; 12. Third cross link; 121. Third rod;
[0041] 2. Second side frame; 21. Tie rod; 211. Slide groove; 22. First cross link; 221. First rod body; 23. Middle link assembly; 231. Second cross link; 232. Second rod body;
[0042] 3. Base frame; 31. Base frame; 311. Frame body; 32. X-shaped folding frame; 321. Connecting seat; 322. Base rod;
[0043] 4. Column; 41. Roller; 42. Sliding sleeve. Detailed Implementation
[0044] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0045] like Figure 1-10 As shown, this embodiment provides a folding transport vehicle, including a column 4, a base frame 3, a first side frame 1, and a second side frame 2.
[0046] Among them, such as Figure 1As shown, four columns 4 are provided, and each column 4 is equipped with a roller 41 at its bottom to enable the transport vehicle to move.
[0047] Two first side frames 1 and two second side frames 2 are each provided. The two first side frames 1 are arranged opposite each other along a first direction, and the two second side frames 2 are arranged opposite each other along a second direction. The first direction and the second direction are perpendicular to each other. For example, the first direction can be considered as the length direction of the transport vehicle, and the second direction can be considered as the width direction of the transport vehicle. The vertical direction claimed in this embodiment can be understood as the height direction of the entire transport vehicle, or the length direction of the column 4.
[0048] The two first side frames 1 and the two second side frames 2 together form a rectangular frame structure to serve as the side walls of the entire transport vehicle.
[0049] The underframe 3 is located at the bottom of the entire transport vehicle and is hinged between the four uprights 4, serving as the chassis of the transport vehicle. Furthermore, the underframe 3 can be folded and stowed at least in a first direction, the specific folding type depending on the actual folding method of the transport vehicle. For example, if the entire transport vehicle is a flat-folding transport vehicle, the underframe 3 is designed to fold and stow only in the first direction; if the entire transport vehicle is a bundle-folding transport vehicle, the underframe 3 can fold not only in the first direction but also in a second direction; see the description below for details.
[0050] In this embodiment, the two second side frames 2 have basically the same structure and can both be folded and retracted along the first direction.
[0051] Combination Figure 2 As shown, the second side frame 2 includes a tie rod 21, a central connecting rod assembly 23, and two first cross connecting rods 22 respectively disposed on both sides of the central connecting rod assembly 23, so as to... Figure 2 Taking the shown perspective as an example, the two first cross links 22 are respectively located on the left and right sides of the middle link assembly.
[0052] Understandably, cross links, also known as scissor links, are generally composed of one or more X-shaped links; and X-shaped links mainly consist of two rods that are hinged together in the middle to achieve folding / unfolding.
[0053] like Figure 2 As shown, the first cross link 22 includes one or more X-shaped links arranged sequentially along the first direction. For example, the first cross link 22 shown in this embodiment includes one X-shaped link, which is mainly formed by two first rods 221 hinged together.
[0054] In this embodiment, the tie rod 21 is vertically arranged and its lower end is hinged to the base frame 3. In some embodiments, the tie rod 21 is basically located in the middle part of the second side frame 2.
[0055] The middle connecting rod assembly 23 includes two second intersecting connecting rods 231 arranged sequentially along a first direction. Both second intersecting connecting rods 231 are vertically telescopic and foldable. Figure 2 As shown, the two second cross links 231 have basically the same structure, both consisting of two X-shaped links. The two X-shaped links are hinged to each other vertically. In order to distinguish them, the rod body constituting the second cross link 231 is referred to as the second rod body 232 in this embodiment.
[0056] like Figure 2 As shown, each second cross link 231 has two ends on its left and right sides. The two ends of the two second cross links 231 that are close to each other are hinged to form a first hinge point R1 and a second hinge point R2 located below the first hinge point R1, that is, as shown. Figure 2 As shown, the upper right end of the second cross link 231 on the left is hinged to the upper left end of the second cross link 231 on the right to form a first hinge point R1, and the lower right end of the second cross link 231 on the left is hinged to the lower left end of the second cross link 231 on the right to form a second hinge point R2.
[0057] The first hinge point R1 is located on the pull rod 21, that is, the upper right end of the second cross link 231 on the left side and the upper left end of the second cross link 231 on the right side are hinged to each other on the upper end of the pull rod 21.
[0058] The second hinge point R2 can move vertically relative to the pull rod 21, specifically in the following two ways.
[0059] The first form is: such as Figure 1-3 ,as well as Figure 6-8 As shown, the pull rod 21 is provided with a groove 211 extending along the length direction (or vertical direction) of the pull rod 21. The groove 211 is a through groove that passes through the pull rod 21 in the second direction. The lower right end of the second cross link 231 on the left side and the lower left end of the second cross link 231 on the right side are hinged to each other through a hinge shaft to form a second hinge point R2.
[0060] The hinge shaft passes through the slide groove 211 and can slide vertically within the slide groove 211. Furthermore, the two ends of the two second cross links 231 forming the second hinge point R2 are located on the inner and outer sides of the pull rod 21, respectively. This can also be understood as the two second rods 232 connected to the hinge shaft being located on the inner and outer sides of the pull rod 21, or in other words, the pull rod 21 being located between the two second rods 232.
[0061] As the transport vehicle folds, the hinge shaft slides downward along the slide 211; conversely, when unfolding, the hinge shaft slides upward along the slide 211.
[0062] The second form is: such as Figure 5 and Figure 10 As shown, the second hinge point R2 is independent of the pull rod 21. This independence can be understood as the second hinge point R2 having no connection with the pull rod 21. Furthermore, the two ends of the two second cross links 231 that form the second hinge point R2 are both located on the same side of the pull rod 21. That is, the two second rods 232 that connect to form the second hinge point R2 are simultaneously located on the outside of the pull rod 21 or simultaneously located on the inside of the rod.
[0063] Both of these methods can enable the second hinge point R2 to move vertically relative to the tie rod 21, and the choice can be made according to actual needs.
[0064] The two ends of the two second cross links 231, located away from each other, are respectively hinged to the two ends of the first cross link 22 on the first side, i.e., as shown... Figure 2 As shown, the two ends on the left side of the second cross link 231 on the left are respectively hinged to the two ends on the right side of the first cross link 22 on the left, and the two ends on the right side of the second cross link 231 on the right are respectively hinged to the two ends on the left side of the first cross link 22 on the right.
[0065] Of the two ends of the second side of the first cross link 22, that is, the two ends of the first cross link 22 near the column 4, the upper end is hinged to the column 4, and the lower end is hinged to the column 4 and can slide vertically relative to the column 4.
[0066] In order to enable the lower one to be hinged to the column 4 and to slide vertically relative to the column 4, specifically: a sliding sleeve 42 that can slide vertically along the column 4 is fitted on the column 4, and the lower end of the second side of the first cross link 22 is hinged to the sliding sleeve 42.
[0067] In this application, a flat-folding transport vehicle and a bundled-folding transport vehicle can be formed depending on whether the first side frame 1 and the base frame 3 can be folded. A flat-folding transport vehicle refers to a transport vehicle that can be folded in one direction, ultimately forming a flat structure in the folded state; while a bundled-folding transport vehicle refers to a transport vehicle that can be folded in two directions, ultimately forming a bundle in the middle. The following provides further explanation:
[0068] In the first embodiment, a flattenable and foldable transport vehicle is provided. In this transport vehicle, neither the first side frame 1 nor the base frame 3 can be folded in the second direction. Specifically:
[0069] like Figure 1As shown, the first side frame 1 includes one or more crossbeams 11. In some embodiments, the crossbeams 11 extend substantially along a second direction, and two adjacent columns 4 along the second direction are fixed together by the crossbeams 11.
[0070] The base frame 3 includes two bottom frames 31 arranged sequentially along the first direction and hinged to each other; the ends of the two bottom frames 31 that are far apart from each other are hinged to two columns 4 on the same side, for example, hinged to the bottom crossbeam 11 connecting the two columns 4.
[0071] The lower end of the pull rod 21 is hinged to one of the two bottom frames 31 at the hinge point between them. In other words, the hinge point between the two bottom frames 31 coincides with the hinge point of the pull rod 21.
[0072] The base frame 31 includes two frames 311 arranged sequentially along a first direction and hinged to each other at their ends. In the unfolded state, the hinged ends of the two frames 311 abut against each other to restrict the two frames 311 from flipping downward, thereby achieving self-locking of the base frame 3 in the unfolded state of the transport vehicle.
[0073] In the second embodiment, a transport vehicle capable of folding in a bundle shape is provided. Unlike the first embodiment, in this embodiment, the first side frame 1 can be folded and retracted along a second direction, and the base frame 3 can be folded not only along the first direction but also along the second direction. Specifically:
[0074] In order to achieve the folding of the first side frame 1 along the second direction, in this embodiment, as follows: Figure 6 As shown, the first side frame 1 includes a third cross link 12 that can be folded and retracted along the second direction. The third cross link 12 includes one or more X-shaped links that are sequentially hinged along the second direction. Each X-shaped link includes two third rods 121 that are hinged to each other. For example, this embodiment shows the case where the first side frame 1 includes two X-shaped links.
[0075] Among the two ends of the third cross link 12 near the column 4, the upper end is hinged to the top of the column 4, and the lower end is hinged to the column 4 and can slide vertically relative to the column 4. For example, the lower end is hinged to the sliding sleeve 42 on the column 4.
[0076] In order for the base frame 3 to be folded simultaneously along the first direction and the second direction, the base frame 3 includes two X-shaped folding frames 32 arranged sequentially along the first direction; the X-shaped folding frame 32 includes a connecting seat 321 and four base rods 322 whose first ends are hinged to the connecting seat 321; wherein the second ends of two base rods 322 are respectively hinged to two uprights 4 on the same side, and the second ends of the other two base rods 322 are respectively hinged to the bottom of two tie rods 21.
[0077] It is understandable that the hinged connection between the first end of the base rod 322 and the connecting seat 321 forms a limiting point. That is, when the base frame 3 is in the unfolded state, the base rod 322 is limited by the connecting seat 321, preventing the connecting seat 321 from continuing to rotate downward relative to the base rod 322, thereby keeping the base frame 3 in the unfolded state. Specifically, the limiting point can be formed by forming a limiting surface on the connecting seat 321. When the base frame 3 is in the unfolded state, part of the top surface of the base rod 322 will abut against the limiting surface of the connecting seat 321 to limit the connecting seat 321 from continuing to rotate downward relative to the base rod 322.
[0078] In conclusion, Figures 1-5 As shown, the aforementioned flat, folding transport vehicle differs in that... Figures 1-3 The diagram shows an embodiment in which a groove 211 is formed on the pull rod 21, and the hinge shaft (i.e., the second hinge point R2) can slide vertically within the groove 211. Figure 5 The example shown is a case where the pull rod 21 does not have a groove 211, and the second hinge point R2 is independent of the pull rod 21.
[0079] Figures 6-10 What is shown is a bundled, folded transport vehicle, the difference being that... Figures 6-9 The diagram shows an embodiment in which a groove 211 is formed on the pull rod 21, and the hinge shaft (i.e., the second hinge point R2) can slide vertically within the groove 211. Figure 10 The example shown is a case where the pull rod 21 does not have a groove 211, and the second hinge point R2 is independent of the pull rod 21.
[0080] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this application can be achieved, and this is not limited herein.
[0081] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0082] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A folding transport vehicle, characterized in that, include: Several columns with rollers at the bottom; The base frame is hinged between the columns and can be folded and stowed at least in a first direction; Two first side frames arranged opposite each other along a first direction; Two second side frames are arranged opposite each other along a second direction and both can be folded and retracted in a first direction; wherein the first direction is perpendicular to the second direction; the second side frame includes a tie rod, a central connecting rod assembly, and two first cross connecting rods respectively disposed on both sides of the central connecting rod assembly; The tie rod is vertically arranged and its lower end is hinged to the base frame; The connecting rod assembly includes two second cross links arranged sequentially along a first direction; both second cross links are vertically telescopic and foldable; the two ends of the two second cross links on the side closest to each other are hinged to each other to form a first hinge point and a second hinge point located below the first hinge point, wherein the first hinge point is positioned on the pull rod, and the second hinge point can move vertically relative to the pull rod; the two ends of the two second cross links on the side furthest from each other are respectively hinged to the two ends of the first side of the first cross link; the two ends of the second side of the first cross link, the upper one is hinged to the column, and the lower one is hinged to the column and can slide vertically relative to the column.
2. A folding transport vehicle according to claim 1, characterized in that, The pull rod is provided with a sliding groove extending along the length of the pull rod, and the second hinge point includes a hinge shaft, which passes through the sliding groove and can slide vertically within the sliding groove.
3. A folding transport vehicle according to claim 2, characterized in that, The two ends of the second hinge point formed by the two second cross links are located on the inner and outer sides of the tie rod, respectively.
4. A folding transport vehicle according to claim 1, characterized in that, The second hinge point is independent of the tie rod, and the two ends of the two second cross links forming the second hinge point are both located on the same side of the tie rod.
5. A folding transport vehicle according to claim 1, characterized in that, The column is provided with a sliding sleeve that can slide vertically along the column, and the lower end of the second side of the first cross link is hinged to the sliding sleeve.
6. A folding transport vehicle according to claim 1, characterized in that, The base frame includes two bottom frames arranged sequentially along a first direction and hinged to each other; the ends of the two bottom frames that are far apart from each other are hinged to two columns on the same side; the lower end of the tie rod is hinged to one of the bottom frames at the hinge point between the two bottom frames; the bottom frame includes two frame bodies arranged sequentially along the first direction and hinged to each other at their ends, wherein, in the unfolded state, the hinged ends of the two frame bodies abut against each other to restrict the two frame bodies from flipping downward.
7. A folding transport vehicle according to claim 1, characterized in that, The first side frame can be folded and retracted along the second direction, and the base frame can also be folded and retracted along the second direction.
8. A folding transport vehicle according to claim 7, characterized in that: The first side frame includes a third cross link that can be folded and retracted along a second direction; of the two ends of the third cross link near the column, the upper end is hinged to the column, and the lower end is hinged to the column and can slide vertically relative to the column.
9. A folding transport vehicle according to claim 7 or 8, characterized in that, The base frame includes two X-shaped folding frames arranged sequentially along a first direction; the X-shaped folding frame includes a connecting seat and four base rods with their first ends hinged to the connecting seat; the second ends of two base rods are respectively hinged to two uprights on the same side, and the second ends of the other two base rods are respectively hinged to the bottom of two tie rods.
10. A folding transport vehicle according to claim 1, characterized in that, The first side frame includes one or more crossbeams, and two adjacent columns along the second direction are fixed together by the crossbeams.