Folding joint of transport vehicle

Abstract

The utility model discloses a folding joint of a transport vehicle, which comprises a movable connecting piece for connecting a front underframe and a rear underframe, the movable connecting piece comprises a first petal body fixedly connected with the front underframe and a second petal body fixedly connected with the rear underframe, and the folding joint of the transport vehicle further comprises a rotating shaft; when the movable connecting piece is completely unfolded, the rotating shaft is lower than the front bottom frame and the rear bottom frame; a first limiting structure is arranged between the first petal body and the second petal body and used for limiting continuous over-limit rotation of the movable connecting piece after the movable connecting piece is unfolded. A rotating shaft of a traditional movable connecting piece is located on a connecting line of the front bottom frame and the rear bottom frame, and the rotating shaft of the movable connecting piece is lower than the front bottom frame and the rear bottom frame, so that the first limiting structure can be farther away from the rotating shaft, and more heavy objects can be borne. Compared with the prior art, the folding joint of the transport vehicle has the advantages that the height of a bottom frame is not increased, the strength of the movable connecting pieces is improved, and large objects can be transported.

Description

Technical Field

[0001] The invention belongs to the field of outdoor products, and in particular relates to a folding joint of a transport vehicle. Background Art

[0002] A beach transport cart, also known as a folding cart, is a kind of outdoor cargo transport tool. It is popular among the public because it can be folded and folded for easy storage. A Chinese utility model patent with the publication number CN215322706U and the patent name "A Folding Trolley" discloses a folding trolley, including a frame body and a plurality of pulleys arranged on the bottom of the frame body. The frame body includes a folding chassis, and the front and rear sides of the folding chassis are respectively movably connected with a front frame and a rear frame. A left folding side frame is connected between the left side of the front frame and the rear frame, and a right folding side frame is connected between the right side of the front frame and the rear frame. The folding chassis includes a front chassis and a rear chassis that are correspondingly arranged in front and back, and a movable connecting piece is provided between the front chassis and the rear chassis so that the front chassis and the rear chassis have a folded state for storage in the front-to-back direction or an unfolded state for use in the front-to-back direction.

[0003] The above beach transporter is convenient to store, but due to the storage structure, when the beach transporter is unfolded to load items, the movable connecting piece is subjected to a large pressure, which can easily break the movable connecting piece. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a folding joint of a transport vehicle capable of transporting larger items without increasing the height of the chassis and increasing the strength of the movable connecting parts in view of the current status of the above-mentioned prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: the folding joint of the transport vehicle includes a movable connecting member connecting the front chassis and the rear chassis, the movable connecting member includes a first petal body fixedly connected to the front chassis, and a second petal body fixedly connected to the rear chassis, and also includes a rotating shaft;

[0006] When the movable connecting member is fully extended, the height of the rotating shaft is lower than the front bottom frame and the rear bottom frame;

[0007] A first limiting structure is provided between the first petal and the second petal, and the first limiting structure is used to limit the continued over-limit rotation of the movable connecting member after it is unfolded. The rotating shaft of the traditional movable connecting member is located on the connecting line of the front chassis and the rear chassis, while the rotating shaft of the present invention is lower than the front chassis and the rear chassis. Such a setting can make the first limiting structure farther from the rotating shaft and can bear more weight.

[0008] In a preferred solution, the first limiting structure includes an arc-shaped first slide groove provided in the first petal body, and a slide column base provided on the second petal body, a slide column body is provided on the slide column base, the first slide groove takes the rotating shaft as the center, and the slide column body slides in the first slide groove when the movable connecting member is stored and unfolded. When the slide column body is located at one end of the slide groove, the entire movable connecting member is unfolded.

[0009] In a preferred solution, the sliding column base is provided with an embedding block on the other side of the sliding column body, and the second petal body is provided with a second embedding groove for embedding the embedding block. The sliding column base can be separated from the second petal body, which is convenient for manufacturing and assembly.

[0010] In a preferred solution, the first petal body is provided with a first upper surface, and when the movable connecting member is fully extended, the first upper surface is flush with the upper surface of the front bottom frame; the second petal body is provided with a second upper surface, and when the movable connecting member is fully extended, the second upper surface is flush with the upper surface of the rear bottom frame. In this way, the movable connecting member can bear the weight together with the front bottom frame and the rear bottom frame, and the weight will not be concentrated on the movable connecting member when the movable connecting member is higher than the front bottom frame.

[0011] In a preferred solution, after the movable connecting member is fully extended, the arc center of the first slide groove is upward. In a preferred solution, the movable connecting member is a structure protruding toward the ground, such a structure can keep the sliding column body away from the rotating shaft as much as possible, thereby increasing the load capacity of the movable connecting member.

[0012] In a preferred solution, a second limiting structure is provided between the first petal body and the second petal body, and the second limiting structure is also used to limit the continued over-limit rotation of the movable connecting member after it is unfolded.

[0013] In a preferred embodiment, the second limiting structure includes a first step portion arranged on the first petal body, and a second step portion arranged on the second petal body. After the movable connecting member is unfolded, the first step portion is pressed against the second step portion; after the movable connecting member is unfolded, the first step portion and the second step portion are both located above the horizontal line where the rotating shaft is located.

[0014] In a preferred solution, the embedding block is a non-cylindrical protrusion, so that even if there is only one embedding block, the embedding block will not rotate in the embedding groove.

[0015] In a preferred embodiment, the first petal body is also provided with a first embedding groove in which the embedding block can be embedded, and the second petal body is also provided with a second sliding groove for the sliding column body to slide. When the sliding column base is assembled to the first petal body, the movable connection can still work normally.

[0016] In summary, compared with the prior art, the advantages of the present invention are: no increase in the height of the base frame, increased strength of the movable connecting parts, and the folding joints of the transport vehicle capable of transporting larger items. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the first embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of the storage state of this utility model;

[0019] Figure 3 yes Figure 1 Schematic diagram of the decomposition of

[0020] Figure 4 yes Figure 3 Schematic diagram of the exploded structure of the second middle petal and the sliding column base;

[0021] Figure 5 Yes Figure 4 A schematic diagram of the structure after the sliding column base is flipped;

[0022] Figure 6 is a schematic diagram of the exploded structure of the first petal body and the sliding column base in the second embodiment;

[0023] Figure 7 It is a schematic diagram of the exploded structure of the second petal body and the sliding column base in the second embodiment. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0025] The figures are as follows: first petal 1, first upper surface 11, first step 12, first slide groove 13, first embedding groove 14, second petal 2, second upper surface 21, second step 22, second slide groove 23, second embedding groove 24, front base 3, rear base 4, rotating shaft 5, sliding column base 6, sliding column body 61, embedding block 62.

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described 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, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0027] It should be noted that the term "comprising" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a product comprising a series of units is not necessarily limited to those units explicitly listed, but may include other units that are not explicitly listed or inherent to these products.

[0028] In this application, the terms "upper", "lower", "left", "right" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. The "in the state where the movable connection is fully extended" mentioned in the text refers to the state where the cart is extended and placed on the ground.

[0029] Embodiment 1, as Figures 1 to 5 As shown, the folding joint of the transport vehicle includes a movable connecting member connecting the front bottom frame 3 and the rear bottom frame 4, the movable connecting member includes a first petal body 1 fixedly connected to the front bottom frame 3, and a second petal body 2 fixedly connected to the rear bottom frame 4, and also includes a rotating shaft 5;

[0030] When the movable connecting member is fully extended, the height of the rotating shaft 5 is lower than the front bottom frame 3 and the rear bottom frame 4;

[0031] A first limiting structure is provided between the first petal body 1 and the second petal body 2, and the first limiting structure is used to limit the continued over-limit rotation of the movable connecting member after the movable connecting member is unfolded. The rotating shaft 5 of the conventional movable connecting member is located on the connecting line of the front base frame 3 and the rear base frame 4, while the rotating shaft 5 of the present invention is lower than the front base frame 3 and the rear base frame 4. Such a setting enables the first limiting structure to be farther from the rotating shaft 5 and can bear more heavy objects.

[0032] In the embodiment, Figure 3 As shown, the first limiting structure includes an arc-shaped first slide groove 13 arranged in the first petal body 1, and a slide column base arranged on the second petal body 2, and a slide column body 61 is arranged on the slide column base. The first slide groove 13 takes the rotating shaft 5 as the center of the circle. When the movable connecting member is stored and unfolded, the slide column body 61 slides in the first slide groove 13. When the slide column body 61 is located at one end of the slide groove, the entire movable connecting member is unfolded.

[0033] In the embodiment, Figure 5 As shown, the sliding column base is provided with an insert 62 on the other side of the sliding column body 61, and the second petal body 2 is provided with a second insert groove 24 for inserting the insert 62. The sliding column base can be separated from the second petal body 2, which is convenient for manufacturing and assembly.

[0034] In the embodiment, Figure 1 and Figure 3 As shown, the first petal 1 is provided with a first upper surface 11, and when the movable connecting member is fully extended, the first upper surface 11 is flush with the upper surface of the front bottom frame 3; the second petal 2 is provided with a second upper surface 21, and when the movable connecting member is fully extended, the second upper surface 21 is flush with the upper surface of the rear bottom frame 4. In this way, the movable connecting member can bear the weight together with the front bottom frame 3 and the rear bottom frame 4, and the weight will not be concentrated on the movable connecting member when the movable connecting member is higher than the front bottom frame 3.

[0035] In the embodiment, after the movable connecting member is fully extended, Figure 3 As shown, the arc center of the first slide slot 13 is upward. In a preferred solution, the movable connecting member is a structure protruding toward the ground, and such a structure can keep the slide column body 61 away from the rotating shaft 5 as far as possible, thereby increasing the load capacity of the movable connecting member.

[0036] In the embodiment, Figure 1 and Figure 3 As shown, a second limiting structure is provided between the first petal body 1 and the second petal body 2, and the second limiting structure is also used to limit the continued over-limit rotation of the movable connecting member after it is unfolded.

[0037] In the embodiment, Figure 1 and Figure 3 As shown, the second limiting structure includes a first step portion 12 arranged on the first petal body 1, and a second step portion 22 arranged on the second petal body 2. After the movable connecting member is unfolded, the first step portion 12 is pressed against the second step portion 22; after the movable connecting member is unfolded, the first step portion 12 and the second step portion 22 are both located above the horizontal line where the rotating shaft 5 is located.

[0038] In the embodiment, Figure 5 As shown, the insert 62 is a non-cylindrical protrusion, so that even if there is only one insert 62 , the insert 62 will not rotate in the second insert groove 24 .

[0039] Embodiment 2: Embodiment 2 adds technical features based on Embodiment 1, such as Figure 6 As shown, the first petal body 1 is also provided with a first embedding groove 14 into which the embedding block 62 can be embedded. Figure 7 The second petal body 2 is also provided with a second slide groove 23 for the sliding column body 61 to slide, so that when the sliding column base is assembled on the first petal body 1, the movable connection member can still work normally.

[0040] The best embodiment of the present invention has been described, and various changes or modifications made by those skilled in the art will not depart from the scope of the present invention.

Claims

1. A folding joint of a transport vehicle, comprising a movable connecting member connecting a front chassis (3) and a rear chassis (4), characterized in that: The movable connecting member comprises a first petal body (1) fixedly connected to the front base frame (3), and a second petal body (2) fixedly connected to the rear base frame (4), and also comprises a rotating shaft (5); When the movable connecting member is fully extended, the height of the rotating shaft (5) is lower than the front base frame (3) and the rear base frame (4); a first limiting structure is provided between the first petal body (1) and the second petal body (2), and the first limiting structure is used to limit the continued over-limit rotation of the movable connecting member after it is extended.

2. The folding joint of the transport vehicle according to claim 1 is characterized in that: The first limiting structure comprises an arc-shaped first slide groove (13) arranged in the first petal body (1), and a slide column base arranged on the second petal body (2), a slide column body (61) is provided on the slide column base, and the first slide groove (13) takes the rotating shaft (5) as the center of the circle. When the movable connecting member is stored and unfolded, the slide column body (61) slides in the first slide groove (13).

3. The folding joint of the transport vehicle according to claim 2 is characterized in that: The sliding column base is provided with an embedding block (62) on the other side of the sliding column body (61), and the second petal body (2) is provided with a second embedding groove (24) for embedding the embedding block (62).

4. The folding joint of the transport vehicle according to claim 3 is characterized in that: The first petal body (1) is provided with a first upper surface (11), and when the movable connecting member is fully unfolded, the first upper surface (11) is flush with the upper surface of the front base frame (3); the second petal body (2) is provided with a second upper surface (21), and when the movable connecting member is fully unfolded, the second upper surface (21) is flush with the upper surface of the rear base frame (4).

5. The folding joint of the transport vehicle according to claim 4 is characterized in that: After the movable connecting member is fully unfolded, the arc center of the first sliding groove (13) faces upward.

6. The folding joint of the transport vehicle according to claim 5 is characterized in that: A second limiting structure is provided between the first petal body (1) and the second petal body (2), and the second limiting structure is also used to limit the continued over-limit rotation of the movable connecting member after it is unfolded.

7. The folding joint of the transport vehicle according to claim 6 is characterized in that: The second limiting structure includes a first step portion (12) arranged on the first petal body (1), and a second step portion (22) arranged on the second petal body (2); after the movable connecting member is unfolded, the first step portion (12) is pressed against the second step portion (22); after the movable connecting member is unfolded, the first step portion (12) and the second step portion (22) are both located above the horizontal line where the rotating shaft (5) is located.

8. The folding joint of the transport vehicle according to claim 7 is characterized in that: The first petal body (1) is also provided with a first embedding groove (14) capable of embedding the embedding block (62), and the second petal body (2) is also provided with a second sliding groove (23) capable of allowing the sliding column body (61) to slide. When the sliding column base is assembled on the first petal body (1), the movable connecting part can still work normally.

9. The folding joint of the transport vehicle according to any one of claims 6 to 8, characterized in that: The insert (62) is a non-cylindrical protrusion.

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