Folding structure of trailer

Abstract

The utility model discloses a folding structure of a trailer, the trailer comprises a bottom frame, a front support, a rear support and other components, an upper pipe body of the rear support is provided with a buckle piece, and the lower end of a left rear branch pipe of the rear support is pivoted with the rear end of the left side of the bottom frame through a first pivoting piece; the lower end of a right rear branch pipe of the rear bracket is pivoted with the rear end of the right side of the underframe through a second pivoting piece; the lower end of a left side pipe of the front bracket is pivoted with the front end of the left side of the underframe; the lower end of a right side pipe of the front bracket is pivoted with the front end of the right side of the underframe; when the folding device needs to be folded, only the buckling piece needs to be released to be separated from the reinforcing pipe of the front support, the rear support can be pivoted to be folded and drawn close to the direction of the bottom frame, and then the front support can be pivoted to the direction of the bottom frame so that folding can be simply, rapidly and conveniently completed. When the front support and the rear support are unfolded, the front support and the rear support only need to be pivoted upwards and are buckled and positioned through the buckling piece and the reinforcing pipe of the front support, and the unfolding state can be simply, conveniently and rapidly completed.

Description

[Technical Field]

[0002] This utility model relates to a folding structure for a trailer, specifically a trailer folding structure that can be easily and conveniently folded or unfolded, and whose front and rear supports do not require any foldable joints and can be fixed or released using only a single buckle. [Background Technology]

[0004] The front-to-back folding structure of existing trailers usually requires foldable joints in its front or rear brackets. This not only increases component costs, but also wastes manpower and time in assembly. Furthermore, the way users fold, unfold, or reassemble the trailer is relatively cumbersome and needs improvement. In addition, the previous U.S. Patent No. 7,341,265, "Improved Folding Baby Trailer Carrier Structure," by the same inventor as this application, discloses a technology related to left-to-right folding. After the two sides of the upper crossbar are detached from the upper brackets on the left and right sides, they can be folded from the first bracket of the upper bracket on the left and right sides to the second bracket, and finally folded towards the base frame. [Utility Model Content]

[0006] The main purpose of this utility model is to provide a folding structure for a trailer, which allows users to easily and conveniently fold and unfold the trailer.

[0007] A secondary objective of this invention is to provide a folding structure for a trailer, wherein the front and rear supports do not require any foldable joints, and the entire support structure can be fixed or released using only a single fastener. This not only reduces costs but also saves manpower and time in assembling the front and rear supports.

[0008] The present invention adopts the following technical solution:

[0009] A folding structure for a trailer, wherein the trailer comprises:

[0010] A base frame, with a left wheel mounting part at the rear left side of the base frame and a right wheel mounting part at the rear right side of the base frame. A bicycle connecting seat is provided at the front of one of the left and right sides of the base frame to mount a bicycle connecting rod.

[0011] One front bracket;

[0012] A rear support includes an upper tube body, a left rear branch tube, and a right rear branch tube. The upper end of the left rear branch tube is connected to the left end of the upper tube body, and the upper end of the right rear branch tube is connected to the right end of the upper tube body.

[0013] Its features are:

[0014] The upper tube of the rear support is provided with a buckle, and the lower end of the left rear branch tube of the rear support is pivotally connected to the rear end of the left side of the base frame through a first pivot member, and the lower end of the right rear branch tube of the rear support is pivotally connected to the rear end of the right side of the base frame through a second pivot member.

[0015] The front support includes a left tube, a right tube, and a reinforcing tube connecting the upper part of the left tube and the upper part of the right tube. The lower end of the left tube is pivotally connected to the front end of the left side of the base frame, and the lower end of the right tube is pivotally connected to the front end of the right side of the base frame. The reinforcing tube is used to be snapped into position or released by the buckle provided on the rear support.

[0016] In this way, the entire support structure can be fixed or released with just one buckle. When folding, the user only needs to release the buckle from the reinforcing tube of the front support, and then the rear support can be pivoted and folded towards the base frame. Then the front support can be pivoted towards the base frame to complete the folding and folding quickly and easily. Conversely, when unfolding, the front and rear supports are pivoted upwards and locked in place by the buckle and the reinforcing tube of the front support, which can complete the unfolding state quickly and easily.

[0017] The rear support has a latching groove to engage or disengage from a predetermined part of the reinforcing tube of the front support.

[0018] The left side tube of the front support includes a first left front support rod and a second left front support rod. The first left front support rod and the second left front support rod are sleeved together and fixed by a detachable first connector. The upper part of the first left front support rod is connected to the left side of the reinforcing tube, and the lower end of the second left front support rod is pivotally connected to the front end of the left side of the base frame through a third pivot element. The right side tube of the front support includes a first right front support rod and a second right front support rod. The first right front support rod and the second right front support rod are sleeved together and fixed by a detachable second connector. The upper part of the first right front support rod is connected to the right side of the reinforcing tube, and the lower end of the second right front support rod is pivotally connected to the front end of the right side of the base frame through a fourth pivot element.

[0019] The first connector is a V-shaped spring plate, a pin, a screw, and a nut, while the second connector is a V-shaped spring plate, a pin, a screw, and a nut.

[0020] The technical effects of this utility model are:

[0021] 1. Users can easily and conveniently fold or unfold the trailer.

[0022] 2. The front and rear brackets do not require any foldable joints, and the entire bracket structure can be fixed or released with just one clip, which not only reduces costs but also saves manpower and time in assembling the front and rear brackets.

[0023] 3. A removable front bracket can be selected to save space.

[0024] The following is a detailed explanation with reference to the diagrams. [Attached Image Description]

[0026] Figure 1 This is a perspective view of the unfolded state of an embodiment of the present invention;

[0027] Figure 2 This is a perspective view of the rear support in the retracted state in an embodiment of this utility model;

[0028] Figure 3 This is a perspective view of the folded and stowed state of an embodiment of this utility model;

[0029] Figure 4 This is an exploded perspective view of some components of an embodiment of this utility model;

[0030] Figure 5 This is an enlarged cross-sectional view of the combination of the left side tube and the connector of the front bracket in an embodiment of this utility model.

[0031] Figure 6 This is an enlarged cross-sectional view of a portion of the combination of the left side tube of the front bracket and another connecting piece in an embodiment of this utility model.

[0032] Figure 7 This is an enlarged cross-sectional view of a portion of the combination of the left side tube of the front bracket and another connecting piece in an embodiment of this utility model.

[0033] Figure 8 This is an enlarged cross-sectional view of the right side tube and connector of the front bracket in an embodiment of this utility model.

[0034] Figure 9 This is an enlarged cross-sectional view of a portion of the right side tube of the front bracket combined with another connecting piece in an embodiment of this utility model.

[0035] Figure 10 This is an enlarged cross-sectional view of a portion of the right side tube of the front bracket combined with another connecting piece in an embodiment of this utility model.

[0036] Figure 11 This is a perspective view of the unfolded state after the addition of a handle in this embodiment of the utility model;

[0037] Figure 12This is a perspective view of the folded and closed state after the addition of a handle in an embodiment of this utility model.

[0038] In the diagram: 1...Trailer; 11...Underframe; 12...Left wheel mounting; 13...Right wheel mounting; 14...Bicycle connector; 15...Pedal link; 2...Front bracket; 21...Left side tube; 211...First left front support rod; 212...Second left front support rod; 22...Right side tube; 221...First right front support rod; 222...Second right front support rod; 23...Reinforcing tube; 24...Handlebar; 3...Rear bracket; 31...Left rear support tube; 32...Right rear support tube; 33...Upper tube body; 4...Snap fastener; 41...Snap fastener slot; 51...First pivot connector; 52...Second pivot connector; 53...Third pivot connector; 54...Fourth pivot connector; 6...First connector; 6'...Second connector.

Detailed Implementation Methods

[0040] The present invention will be further described in detail below with reference to the accompanying drawings, but this is not intended to limit the present invention.

[0041] like Figures 1-3 As shown, this utility model discloses a folding structure for a bike trailer, wherein the trailer 1 comprises:

[0042] A base frame 11 is provided with a left wheel mounting part 12 on the left rear side for mounting a left wheel (not shown) and a right wheel mounting part 13 on the right rear side for mounting a right wheel (not shown). In this embodiment, the left wheel mounting part 12 is a left mounting hole and the right wheel mounting part 13 is a right mounting hole. However, this is not a limitation. The left wheel mounting part 12 can also be a left wheel frame (not shown) and the right wheel mounting part 13 can also be a right wheel frame (not shown). A bicycle connecting seat 14 is provided on the front of one side of the left and right sides of the base frame 11, which can mount a pedal link 15 for connecting to a bicycle (not shown).

[0043] 1 front bracket 2;

[0044] A rear support 3 includes an upper tube body 33, a left rear branch tube 31, and a right rear branch tube 32. The upper end of the left rear branch tube 31 is connected to the left end of the upper tube body 33, and the upper end of the right rear branch tube 32 is connected to the right end of the upper tube body 33.

[0045] The upper tube 33 of the rear bracket 3 is equipped with a fastener 4 (such as...). Figure 1 , Figure 3As shown), the lower end of the left rear branch pipe 31 of the rear support 3 is pivotally connected to the left rear end of the base frame 11 through a first pivot member 51, and the lower end of the right rear branch pipe 32 of the rear support 3 is pivotally connected to the right rear end of the base frame 11 through a second pivot member 52.

[0046] The front support 2 includes a left side tube 21, a right side tube 22, and a reinforcing tube 23 connecting the upper part of the left side tube 21 and the upper part of the right side tube 22. The lower end of the left side tube 21 is pivotally connected to the front end of the left side of the base frame 11, and the lower end of the right side tube 22 is pivotally connected to the front end of the right side of the base frame 11. The reinforcing tube 23 is used to be locked and positioned by the fastener 4 provided on the rear support 3 (e.g., ...). Figure 1 (as shown) or release (as shown) Figures 2-3 (as shown);

[0047] In this way, only one latch 4 is needed to fix or release the entire bracket structure. When folding or collapsing, the user only needs to release the latch 4 from the reinforcing tube 23 of the front bracket 2, and then the rear bracket 3 can be pivoted and folded closer to the base frame 11 (e.g., Figure 2 As shown), the front bracket 2 can then be pivoted toward the base frame 11 to easily and quickly complete the folding and storage (as shown). Figure 3 (as shown); Conversely, when unfolding, simply pivot the front bracket 2 and the rear bracket 3 upwards, and the buckle 4 engages with the reinforcing tube 23 of the front bracket 2 for positioning, thus easily and quickly completing the unfolding process (as shown). Figure 1 As shown in the figure, since the front bracket 2 and the rear bracket 3 do not need to be equipped with any foldable joints, and only a single fastener 4 is needed to fix or release the entire bracket structure, not only is the cost reduced, but the manpower and time required for assembling the front bracket 2 and the rear bracket 3 are also saved.

[0048] Furthermore, in this embodiment, the buckle 4 of the rear bracket 3 is made of plastic and has a buckle groove 41 (e.g., Figures 2-3 As shown), it is positioned by snapping into the predetermined part of the reinforcing tube 23 corresponding to the front bracket 2 (as shown). Figure 1 (as shown) or release (as shown) Figures 2-3 (as shown), but this utility model is not limited thereto, and any equivalent use should be included in the scope of this patent.

[0049] Furthermore, in this embodiment, the front bracket 2 is detachable to save space, but this utility model is not limited thereto. Additionally, as... Figure 4 As shown, the left side tube 21 of the front bracket 2 includes a first left front support rod 211 and a second left front support rod 212. The first left front support rod 211 and the second left front support rod 212 are sleeved together and connected by a detachable first connector 6, such as a V-shaped spring plate (e.g., Figure 5(as shown) or latch (such as) Figure 6 (as shown) or screws and nuts (such as Figure 7 The components (as shown) are connected and fixed together. The upper part of the first left front support rod 211 is connected to the left side of the reinforcing tube 23. The lower end of the second left front support rod 212 is pivotally connected to the front end of the left side of the base frame 11 through the third pivot element 53. The right side tube 22 of the front support 2 includes a first right front support rod 221 and a second right front support rod 222. The first right front support rod 221 and the second right front support rod 222 are sleeved together and connected by a detachable second connector 6', such as a V-shaped spring sheet (e.g., ...). Figure 8 (as shown) or latch (such as) Figure 9 (as shown) or screws and nuts (such as Figure 10 The first right front support rod 221 is connected and fixed with detachable connectors, and the upper part of the first right front support rod 221 is connected to the right side of the reinforcing tube 23. The lower end of the second right front support rod 222 is pivotally connected to the front end of the right side of the base frame 1 through the fourth pivot element 54.

[0050] Furthermore, a handle 24 can also be optionally connected above the front bracket 2 described in this embodiment (e.g., Figure 11 As shown), although a handle 24 has been added, the user operation remains simple and convenient. When folding or collapsing, the user only needs to release the buckle 4 from the reinforcing tube 23 of the front bracket 2, and then the rear bracket 3 can be pivoted and folded towards the base frame 1. The front bracket 2 can then be pivoted towards the base frame 1 to complete the folding and collapsing process quickly and easily (as shown). Figure 12 (as shown); Conversely, when unfolding, simply pivot the front support 2 and the rear support 3 upwards and lock them in place by the latching piece 4 and the reinforcing tube 23 of the front support 2. This allows for a simple, convenient, and quick unfolding process (as shown). Figure 11 (As shown).

[0051] It is worth noting that the above description is only a preferred embodiment of this utility model and does not limit the scope of patent protection of this utility model. This utility model can also improve the materials and structure of the above-mentioned components, or replace them with technical equivalents. Therefore, all equivalent structural changes made based on the description and drawings of this utility model, or direct or indirect applications to other related technical fields, are similarly included within the scope of this utility model.

Claims

1. A folding structure for a trailer, wherein the trailer (1) comprises: A base frame (11) is provided with a left wheel mounting part (12) at the rear left side of the base frame (11) and a right wheel mounting part (13) at the rear right side of the base frame (11). A bicycle connecting seat (14) is provided at the front of one of the left and right sides of the base frame (11) so that a bicycle connecting rod (15) can be installed. One front bracket (2); A rear support (3) includes an upper tube body (33), a left rear branch tube (31), and a right rear branch tube (32). The upper end of the left rear branch tube (31) is connected to the left end of the upper tube body (33), and the upper end of the right rear branch tube (32) is connected to the right end of the upper tube body (33). Its features are: The upper tube (33) of the rear support (3) is provided with a buckle (4), and the lower end of the left rear branch tube (31) of the rear support (3) is pivotally connected to the rear end of the left side of the base frame (11) through a first pivot (51), and the lower end of the right rear branch tube (32) of the rear support (3) is pivotally connected to the rear end of the right side of the base frame (11) through a second pivot (52). The front support (2) includes a left tube (21), a right tube (22) and a reinforcing tube (23) connecting the upper part of the left tube (21) and the upper part of the right tube (22). The lower end of the left tube (21) is pivotally connected to the front end of the left side of the base frame (11), and the lower end of the right tube (22) is pivotally connected to the front end of the right side of the base frame (11). The reinforcing tube (23) is used to be snapped into position or released by the buckle (4) provided on the rear support (3). In this way, when you want to fold and fold, you only need to release the buckle (4) from the reinforcing tube (23) of the front bracket (2), and then you can pivot the rear bracket (3) towards the base frame (11) to fold and close it. Then you can pivot the front bracket (2) towards the base frame (11) to complete the folding and folding in a simple, quick and convenient way. Conversely, when it is to be unfolded, the front bracket (2) and the rear bracket (3) are pivoted upward and locked in place by the buckle (4) and the reinforcing tube (23) of the front bracket (2).

2. The folding structure of the trailer as described in claim 1, characterized in that: The latching member (4) provided on the rear bracket (3) has a latching groove (41) to be latched and positioned or released from a predetermined position of the reinforcing tube (23) of the front bracket (2).

3. The folding structure of the trailer as described in claim 1, characterized in that: The left side tube (21) of the front support (2) includes a first left front support rod (211) and a second left front support rod (212). The first left front support rod (211) and the second left front support rod (212) are sleeved together and fixed by a detachable first connector (6). The upper part of the first left front support rod (211) is connected to the left side of the reinforcing tube (23), and the lower end of the second left front support rod (212) is pivotally connected to the front end of the left side of the base frame (11) through a third pivot element (53). The right side tube (22) of the front bracket (2) includes a first right front support rod (221) and a second right front support rod (222). The first right front support rod (221) and the second right front support rod (222) are sleeved together and connected and fixed by a detachable second connector (6'). The upper part of the first right front support rod (221) is connected to the right side of the reinforcing tube (23), and the lower end of the second right front support rod (222) is pivotally connected to the front end of the right side of the base frame (11) through a fourth pivot element (54).

4. The folding structure of the trailer as described in claim 3, characterized in that: The first connector (6) is a V-shaped spring plate, a pin, a screw, and a nut, while the second connector (6') is a V-shaped spring plate, a pin, a screw, and a nut.

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