Bottom-frame-free frame and cart

Abstract

The utility model relates to the technical field of carts, in particular to a frame without a bottom frame and a cart, the frame comprises two first side frames which are oppositely arranged in the first direction, and a second side frame which can be folded in the first direction is connected between the two first side frames; the first side frame comprises two stand columns which are sequentially arranged in the second direction, rolling wheels are arranged at the bottoms of the stand columns, and the first direction is perpendicular to the second direction. A supporting assembly and a supporting frame are arranged between the two stand columns, the supporting assembly comprises two supporting rods, one ends of the two supporting rods are hinged, and the other ends of the two supporting rods are hinged to the two stand columns respectively. The supporting frame is used for supporting the two stand columns when the frame is unfolded, and the supporting frame can be folded in the second direction. The frame further comprises a plurality of flexible supporting belts, and the supporting belts are sequentially arranged in the second direction and used for bearing the bag bottom of the vehicle bag. The two ends of the supporting belt are connected to the two opposite supporting rods in the first direction respectively. The weight of the whole frame can be reduced.

Description

Technical Field

[0001] This application relates to the field of trolley technology, and more particularly to a frameless trolley frame and trolley. Background Technology

[0002] Trolleys, as a common means of transportation, are widely used in daily life. With the development of technology, in order to facilitate storage and packaging, some trolleys are often designed with a foldable structure. They are mainly composed of a foldable frame and a bag. The frame can be folded and folded along the length and width of the vehicle. In order to support the bottom of the bag, the frame also includes a bottom frame (also called a base frame). When in use, the bottom frame supports the bottom of the bag to bear the weight.

[0003] In related technologies, in order to accommodate the folding of the frame, the bottom frame is usually a foldable rigid frame structure, such as a metal link component. It is relatively heavy, so the existence of such a foldable bottom frame will increase the weight of the entire frame, and therefore needs to be improved. Utility Model Content

[0004] 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 bottomless frame and a trolley.

[0005] To achieve the above objectives, this application provides the following technical solution.

[0006] On one hand, this application provides a frameless vehicle frame, including two first side frames arranged opposite each other along a first direction, and a second side frame that can be folded and retracted along the first direction connected between the two first side frames; the first side frames include two uprights arranged sequentially along a second direction and having rollers at their bottoms, the first direction and the second direction being perpendicular to each other; a support assembly and a support frame are provided between the two uprights, the support assembly including two support rods, one end of the two support rods being hinged together, and the other end being respectively hinged to the two uprights; the support frame is used to support the two uprights when the vehicle frame is unfolded, and the support frame can be folded and retracted along the second direction; the vehicle frame also includes a plurality of flexible support straps, each support strap being arranged sequentially along the second direction to support the bottom of the bag; wherein, the two ends of the support straps are respectively connected to the two support rods opposite each other along the first direction.

[0007] As an optional embodiment of this application, the support belt is made of flexible fabric.

[0008] As an optional embodiment of this application, when the frame is in the unfolded state, the support strap is tensioned along a first direction between two support rods on opposite sides.

[0009] As an optional embodiment of the present application, the support frame comprises two first connecting rods, two second connecting rods, and two diagonal struts; the first ends of the two first connecting rods are hingedly connected, and the second ends of the two first connecting rods are respectively hingedly connected to the two support rods of the support assembly; the first ends of the two second connecting rods are respectively hingedly connected to the middle portions of the two first connecting rods; the first ends of the two diagonal struts are respectively hingedly connected to the second ends of the two second connecting rods, and the second ends of the two diagonal struts are respectively connected to the two upright columns opposite to each other in the second direction, wherein the second ends of the diagonal struts are capable of rotating and vertically moving relative to the upright columns, and the middle portions of the diagonal struts are hingedly connected to the support rods on the same side thereof.

[0010] As an optional embodiment of the present application, the second side frame is a scissor-type connecting rod structure comprising one or more groups of X-shaped connecting rods hingedly connected in sequence in the first direction, and each X-shaped connecting rod comprises two rod bodies hingedly connected to each other; of the two end portions of the second side frame close to the upright column, the lower end portion is hingedly connected to the upright column, and the upper end portion constitutes a movable end, which is capable of rotating relative to the upright column and vertically moving synchronously with the second ends of the diagonal struts.

[0011] As an optional embodiment of the present application, the upright column is provided with a sliding sleeve capable of vertically sliding, and the second ends of the diagonal struts and the movable end of the second side frame are hingedly connected to the sliding sleeve.

[0012] As an optional embodiment of the present application, in the unfolded state of the frame, the hingedly connected ends of the two support rods of the first side frame abut against each other, so that the two support rods are kept in the unfolded state.

[0013] In another aspect, the present application also provides a stroller comprising a frame and a bag, wherein the frame is the bottomless frame as described above.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] In the present application, the flexible support belt is used to support the bottom of the bag, and compared with the traditional stroller using a rigid bottom frame to support the bottom of the bag, the flexible support belt is lighter in weight, thereby being conducive to reducing the weight of the entire frame.

[0016] Moreover, the support belt is flexible, and thus does not interfere with the normal folding of the frame.

[0017] It should be understood that the content described in this section is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description read in conjunction with the accompanying drawings, in which:

[0019] In the drawings, the same or similar reference numerals are used to denote the same or similar parts throughout the several views.

[0020] Figure 1 Structure diagram of example 1 in unfolded state;

[0021] Figure 2 Front view of Figure 1

[0022] Figure 3 Top view of example 1;

[0023] Figure 4 Structure diagram of example 1 in folding process;

[0024] Figure 5 Structure diagram of example 1 in folded state;

[0025] Figure 6 Structure diagram of example 2 in unfolded state.

[0026] Explanation of reference numerals in the drawings:

[0027] 1, first side frame; 11, stand column; 111, roller; 12, support assembly; 121, support rod; 122, hinge joint; 13, support frame; 131, first connecting rod; 132, second connecting rod; 133, diagonal bracing rod; 14, sliding sleeve;

[0028] 2, second side frame; 21, X-shaped connecting rod; 211, rod body;

[0029] 3, support belt;

[0030] 4, car bag. DETAILED DESCRIPTION

[0031] In order to make the purposes, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] Example 1

[0033] In conjunction with Figures 1-5 ​As shown, the embodiment provides a bottom frameless vehicle frame, wherein the vehicle frame is a foldable vehicle frame, which comprises two first side frames 1 and two second side frames 2. It is worth mentioning that the bottom frameless vehicle frame claimed in the embodiment refers to a vehicle frame without a hard frame bottom frame.

[0034] As shown, Figure 1 The two first side frames 1 are arranged opposite to each other along a first direction, and the two second side frames 2 are arranged opposite to each other along a second direction and connected between the two first side frames 1. The first direction is perpendicular to the second direction, for example, if the width direction of the vehicle frame is regarded as the first direction, then the length direction of the vehicle frame is the second direction.

[0035] As shown, Figure 1 The second side frame 2 is a foldable structure, specifically, the second side frame 2 can be folded along the first direction to drive the two first side frames 1 to move towards each other along the first direction.

[0036] In the embodiment, the two first side frames 1 have basically the same structure, and the two second side frames 2 also have basically the same structure, so in the embodiment, for the convenience of description, only one first side frame 1 and one second side frame 2 will be taken as an example for specific description below:

[0037] As shown, Figure 1 and Figure 2 The first side frame 1 mainly comprises two upright columns 11, a support assembly 12 and a support frame 13.

[0038] In the first side frame 1, the two upright columns 11 are arranged in sequence along the second direction, and the bottom of each upright column 11 is provided with a roller 111.

[0039] As shown, Figure 2 The support assembly 12 is arranged between the two upright columns 11 adjacent along the second direction, specifically, the support assembly 12 comprises two support rods 121, which are connected to each other along the second direction, specifically, the first ends of the two support rods 121 are hinged together, and the hinge points of the two are marked as first hinge points R1; in addition, the second ends of the two support rods 121 are respectively hinged to the bottoms of the two upright columns 11.

[0040] As shown, Figure 1 In the unfolded state of the vehicle frame, the mutually hinged ends of the two support rods 121 of the first side frame 1 abut against each other, that is, the first ends of the two support rods 121 abut against each other, so that the two support rods 121 remain in the unfolded state.

[0041] Specifically, as shown, Figure 2As shown, the first ends of the two support rods 121 are hinged to each other through a hinge seat. The hinge seat includes two hinge joints 122. The two hinge joints 122 are respectively fixed on the first ends of the two support rods 121, and the lower ends of the two hinge joints 122 are hinged to each other. When the frame is in the unfolded state, the ends of the two hinge joints 122 abut against each other, thereby restricting the two hinge joints 122 from continuing to rotate downward relative to each other, so that the two support rods 121 remain in the unfolded state.

[0042] The support frame 13 is also disposed between two adjacent uprights 11 along the second direction, for supporting the two uprights 11 when the frame is unfolded; in addition, the support frame 13 can be folded and retracted along the second direction, specifically:

[0043] Combination Figure 2 As shown, the support frame 13 includes two first connecting rods 131, two second connecting rods 132, and two diagonal braces 133.

[0044] The first ends of the two first connecting rods 131 are hinged together, and the hinge point is denoted as the second hinge point R2; when the frame is in the unfolded state, as Figure 2 As shown, the second hinge point R2 is located below the first hinge point R1. In addition, the second ends of the two first connecting rods 131 are respectively hinged to the two support rods 121 of the same support assembly 12. The hinge points of the second ends of the two first connecting rods 131 are basically symmetrically arranged on both sides of the first hinge point R1, so that the two first connecting rods 131 and the support rods 121 form a triangular support structure, which helps to improve the stability of the frame when it is unfolded.

[0045] The first ends of the two second links 132 are respectively hinged to the middle of the two first links 131, preferably, as follows: Figure 2 As shown, when the frame is in the unfolded state, the second link 132 and the support rod 121 are parallel to each other.

[0046] The first ends of the two diagonal braces 133 are respectively hinged to the second ends of the two second connecting rods 132, and the second ends of the two diagonal braces 133 are respectively connected to the two columns 11 opposite to each other along the second direction.

[0047] Among them, such as Figure 2 As shown, the second end of the diagonal brace 133 can rotate and move vertically relative to the column 11, where vertical can be understood as the length direction of the column 11. Furthermore, the middle part of the diagonal brace 133 is hinged to the support rod 121 on the same side.

[0048] In order to enable the second end of the diagonal brace 133 to rotate and vertically move relative to the stand column 11, in some embodiments, a sleeve 14 capable of vertically sliding relative to the stand column 11 is sleeved on the stand column 11, and the second end of the diagonal brace 133 is hinged to the sleeve 14, so that the second end of the diagonal brace 133 can rotate relative to the stand column 11; in addition, the sleeve 14 vertically slides on the stand column 11, thereby driving the second end of the diagonal brace 133 to vertically slide.

[0049] It can be understood that the first connecting rod 131, the second connecting rod 132, and the diagonal brace 133 on one side in the same support frame 13 are arranged substantially symmetrically on both sides of the first hinge point R1, and the first connecting rod 131, the second connecting rod 132, and the diagonal brace 133 on the other side are arranged substantially symmetrically on both sides of the first hinge point R1.

[0050] It is worth noting that when the stroller is in use, as shown in Figure 6 , the bag 4 needs to be installed on the frame, and therefore, in the present embodiment, in order to support the bottom of the bag 4, as shown in Figure 3 , the frame further comprises a plurality of flexible support belts 3. In some embodiments, the support belts 3 are preferably flexible fabrics, such as woven belts, which can be made of polyester fiber, polyester, or other materials. It is worth noting that the support belts 3 are not shown in Figure 1 , Figure 2 , Figure 4 , Figure 5 .

[0051] As shown in Figure 3 , all the support belts 3 are arranged in sequence in the second direction to support the bottom of the bag 4, and in addition, the two ends of each support belt 3 are connected to the two support rods 121 opposite in the first direction, wherein the end of the support belt 3 can be directly fixed on the support rod 121, such as by a clasp, or can be sleeved on the support rod 121, which is not limited here.

[0052] In some embodiments, as shown in Figure 3 , in the unfolded state of the frame, the support belts 3 are tensioned between the two support rods 121 opposite in the first direction. At this time, the belt surface of each support belt 3 forms a support surface to support the bottom of the bag 4, wherein the bottom of the bag 4 can be fixed on the support belt 3, such as sewn on the support belt 3, or can be directly placed on the support belt 3, which is not limited here.

[0053] It can be seen that in the present embodiment, the traditional hard frame as a bottom frame to support the bottom of the bag 4 is cancelled, and instead, the flexible support belts 3 are used to support the bottom, which is lighter in weight compared to the hard frame, thereby facilitating the reduction of the weight of the entire frame, and the support belts 3 are flexible, so as not to interfere with the normal folding of the frame.

[0054] When folding, as shown in Figure 4 , the first side frame 1 is folded step by step along the second direction, while the second side frame 2 is folded step by step along the first direction, so as to finally realize the folding of the frame, and present a state as shown in Figure 5 . Since the support belt 3 is flexible, it can naturally bend and deform during the folding of the first side frame 1 and the second side frame 2, so as to interfere with the normal folding of the entire frame.

[0055] When unfolding the frame, as shown in Figure 1 , the two unfolded support rods 121 have two functions. First, they support the two upright columns 11 of the same first side frame 1 in cooperation with the support frame 13. Second, they bear the weight, i.e., the weight of the bag 4 and the articles in the bag 4 is transferred to the support belt 3, and the support belt 3 is supported by the support rods 121. Thus, the support rods 121 indirectly bear the weight of the bag 4 and the articles in the bag 4, i.e., bear the weight.

[0056] In order to enable the second side frame 2 to fold along the first direction, in some embodiments, as shown in Figure 1 , the second side frame 2 can adopt a scissor linkage structure, which includes one or more groups of X-shaped linkages 21 that are sequentially hinged along the first direction. For example, in the present embodiment, two groups of X-shaped linkages 21 are adopted, and the ends of the two X-shaped linkages 21 close to each other are hinged to each other. The following will be specifically described by taking this as an example:

[0057] As shown in Figure 1 , the X-shaped linkage 21 includes two rod bodies 211, and the middle portions of the two rod bodies 211 are hingedly connected to each other, so as to form an X-shaped linkage structure. Thus, the two rod bodies 211 of the X-shaped linkage 21 can be folded and unfolded along the first direction. It can be seen that each side of the X-shaped linkage 21 will form two ends, one above the other.

[0058] Among the two ends of the side of the second side frame 2 close to the upright column 11, the lower end is hinged to the upright column 11, and the upper end constitutes a movable end. The movable end can rotate relative to the upright column 11 and can vertically move synchronously with the second end of the diagonal brace 133. Specifically, the movable end of the second side frame 2 is hingedly connected to the sliding sleeve 14, so that the movable end can vertically slide synchronously with the second end of the diagonal brace 133.

[0059] Embodiment 2

[0060] In combination with Figures 1-6 , the present embodiment further provides a bottomless frame stroller on the basis of embodiment 1, which includes a frame and a bag 4. The frame adopts the bottomless frame provided in embodiment 1, and specifically:

[0061] AsFigure 6 As shown, in the unfolded state of the car bag 4, the bag opening of the car bag 4 is rectangularly unfolded, and the four corners of the bag opening of the car bag 4 are respectively fixed at the top of the four vertical columns 11; and the bag bottom of the car bag 4 can be directly placed on the support belt 3 or fixed on the support belt 3, which is not specifically limited here.

[0062] It should be understood that various forms of the flow shown above can be used to reorder, add or delete steps. For example, each step described in the present application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solutions disclosed in the present application can be achieved, which is not limited herein.

[0063] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0064] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A frameless vehicle chassis, characterized in that, The vehicle frame comprises two first side frames arranged opposite to each other along a first direction, and a second side frame connected between the two first side frames and capable of being folded along the first direction; the first side frame comprises two upright columns arranged in sequence along a second direction and provided with rollers at bottoms, the first direction and the second direction being perpendicular to each other; a support assembly and a support frame are arranged between the two upright columns, the support assembly comprises two support rods, one end of each support rod is hingedly connected, and the other end of each support rod is hingedly connected to the two upright columns respectively; the support frame is used for supporting the two upright columns when the vehicle frame is unfolded, and the support frame is capable of being folded along the second direction; the vehicle frame further comprises a plurality of flexible support belts arranged in sequence along the second direction and used for supporting bag bottoms of vehicle bags; and the two ends of each support belt are connected to the two support rods opposite to each other along the first direction respectively.

2. A no-ledge frame according to claim 1, characterized in that The support belt is a flexible fabric.

3. A no-ledge frame according to claim 1, wherein, In the unfolded state of the vehicle frame, the support belt is tensioned between the two support rods on opposite sides along the first direction.

4. The no-ledge frame of claim 1, wherein, The support frame comprises two first connecting rods, two second connecting rods, and two inclined support rods; first ends of the two first connecting rods are hingedly connected, second ends of the two first connecting rods are hingedly connected to the two support rods of the support assembly respectively; first ends of the two second connecting rods are hingedly connected to middle portions of the two first connecting rods respectively; second ends of the two second connecting rods are hingedly connected to first ends of the two inclined support rods respectively, and second ends of the two inclined support rods are connected to the two upright columns opposite to each other along the second direction, wherein the second end of the inclined support rod is capable of rotating and vertically moving relative to the upright column, and a middle portion of the inclined support rod is hingedly connected to the support rod on the same side.

5. A no-ledge frame according to claim 4, wherein, The second side frame is a scissor-type connecting rod structure comprising one or more groups of X-shaped connecting rods hingedly connected in sequence along the first direction, and each X-shaped connecting rod comprises two rod bodies hingedly connected to each other; among two end portions of the second side frame on a side close to the upright column, a lower end portion is hingedly connected to the upright column, and an upper end portion constitutes a movable end, the movable end is capable of rotating relative to the upright column and vertically moving synchronously with the second end of the inclined support rod.

6. A no-ledge frame according to claim 5, wherein, The upright column is provided with a sliding sleeve capable of vertically sliding, and the second end of the inclined support rod and the movable end of the second side frame are hingedly connected to the sliding sleeve.

7. A wheel chair according to claim 1, wherein In the unfolded state of the vehicle frame, the hingedly connected ends of the two support rods of the first side frame abut against each other, so that the two support rods remain in the unfolded state.

8. A cart comprising a frame and a cart bag, characterized in that, The vehicle frame adopts the bottomless vehicle frame according to any one of claims 1 to 7.

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