Frame folding structure

Abstract

The utility model provides a kind of frame folding structure, at least including a car structure, a bearing frame and a linkage structure, bearing frame includes the front frame and rear frame of pivot in the pivot of car structure, the front frame and rear frame are pivotally connected with a front mechanism and a rear mechanism respectively in the other end of pivot, the bottom of both sides of front mechanism and rear mechanism is equipped with wheel, the pivot position of front mechanism and rear mechanism and the wheel between front frame and rear frame is equipped with positioning rod, and linkage mechanism is pivotally connected between two positioning rods, the utility model is through pulling the car structure of car structure, make the clamping part of car structure disengage the clamping structure of linkage structure, and the car handle is pulled upwards, i.

Description

Technical Field

[0001] This utility model relates to the field of handcart mechanisms, and in particular to a folding structure for a cart frame that can be quickly folded and unfolded and is easy to move after folding. Background Technology

[0002] The conventional handcart structure has wheels at the four corners of the bottom of a support shelf, and a foldable handle at one end of the support shelf. When using this handcart, you only need to pull the handle out perpendicular to the support shelf to load goods and use the handle to move the handcart. When you are done using it, you only need to fold the handle so that it is parallel to the support shelf. However, although this folding and unfolding structure of the handcart is quick and convenient, the folded state is very inconvenient to move and store.

[0003] Therefore, there are camping carts on the market that use multiple linkages on both sides to form a linkage mechanism. When folding, the linkage mechanism on both sides of the cart folds the front and rear edges of the cart inward. This mechanism allows the cart to still be pushed and stored after folding. However, in order to set up the linkage mechanism, the loading space of this type of camping cart is limited to the linkage mechanism between the front and rear edges of the cart and the two sides, which restricts the size of the loaded goods. Moreover, compared with the conventional cart structure with a single-piece support shelf, the weight of goods that this type of camping cart can support is also limited.

[0004] As mentioned above, the existing handcart and camping cart structures all have structural problems and are not good designs. Therefore, in view of the functional limitations caused by the shortcomings of the existing structures, the inventor of this utility model urgently sought to improve and innovate them. After painstaking research, he finally successfully developed the folding frame structure of this vehicle. Utility Model Content

[0005] In order to overcome the problems of the prior art, the purpose of this utility model is to provide a frame folding structure with strong load-bearing capacity, which can be quickly folded and unfolded, and is easy to push and store in the folded state.

[0006] To achieve the above objectives, this utility model provides a frame folding structure, characterized in that it includes:

[0007] A retraction structure, the retraction structure including at least one pivot rod, and a pivoting part is provided at each end of the pivot rod;

[0008] A support frame includes a front frame and a rear frame, which are respectively located at both ends of a retractable structure. The two sides of the front frame and the rear frame facing the retractable structure are pivotally connected to two pivoting parts. The two sides of the front frame away from the two pivoting parts are pivotally connected to a front mechanism. The two sides of the rear frame away from the two pivoting parts are pivotally connected to a rear mechanism. A wheel is provided on both sides of the bottom of the front mechanism and the rear mechanism. A positioning rod parallel to the retractable structure is provided on the upper part of the front mechanism and the rear mechanism near the wheel. A pivoting part is provided on the side of the positioning rod facing the other positioning rod near both ends. The pivoting part is pivotally connected to one end of a pivoting element.

[0009] A linkage mechanism includes a first linkage rod, a second linkage rod, a third linkage rod, and a fourth linkage rod. The first linkage rod and the second linkage rod are arranged intersectingly, and the middle position of the first linkage rod is pivotally connected to the middle position of the second linkage rod. The third linkage rod and the fourth linkage rod are arranged intersectingly, and the middle position of the third linkage rod is pivotally connected to the middle position of the fourth linkage rod. One end of the first linkage rod is pivotally connected to one end of the third linkage rod, and one end of the second linkage rod is pivotally connected to one end of the fourth linkage rod. The free ends of the first linkage rod, the second linkage rod, the third linkage rod, and the fourth linkage rod are all pivotally connected to the other end of the pivoting element.

[0010] The aforementioned folding frame structure further includes an elastic element and an outer sleeve rod. The outer edge of the pivot rod has at least one limiting hole along its axial direction. The outer sleeve rod is fitted onto the outer edge of the pivot rod, and the inner edge of the outer sleeve rod has a positioning block protruding through the limiting hole. The elastic element is located at one end inside the pivot rod, and both ends of the elastic element are respectively fixed to the inner wall of the pivot rod and the positioning block.

[0011] The frame folding structure is provided with a positioning component at the pivot position of one end of the first linkage rod and the third linkage rod, and / or at the pivot position of the second linkage rod and the fourth linkage rod. The positioning component is provided with at least one engaging structure. The surface of the outer sleeve rod facing the linkage mechanism is provided with at least one engaging member, and the engaging member engages with the engaging structure.

[0012] The aforementioned frame folding structure, wherein: the snap-fit ​​component and the snap-fit ​​structure are corresponding snap hooks and snap slots.

[0013] The aforementioned frame folding structure includes a folding handle on the surface of the outer sleeve away from the linkage mechanism.

[0014] The aforementioned vehicle frame folding structure includes at least one reinforcing bar perpendicular to both sides of the front frame and / or rear frame.

[0015] The aforementioned vehicle frame folding structure includes a positioning seat on the first connecting rod, the second connecting rod, the third connecting rod, and / or the fourth connecting rod. The positioning seat has a positioning slot for the positioning rods of the front mechanism and the rear mechanism to be inserted.

[0016] The aforementioned frame folding structure further includes a push handle, which is located above the rear mechanism of the vehicle. The push handle includes at least one segment rotating mechanism and a grip portion pivotally connected to the segment rotating mechanism.

[0017] This invention can be quickly folded and unfolded, and is easy to move after being folded. Attached Figure Description

[0018] Figure 1 This is a three-dimensional view of the folding structure of the vehicle frame of this utility model;

[0019] Figure 2 This is a perspective view of the folding structure of the frame of this utility model;

[0020] Figure 3 This is a side sectional view of the folding structure of the frame folding structure of this utility model;

[0021] Figure 4 This is a three-dimensional view of the frame folding structure of this utility model from another perspective;

[0022] Figure 5 This is a schematic diagram of the first action of the folding mechanism of the frame of this utility model.

[0023] Figure 6 This is a schematic diagram of the second action of the folding mechanism of the frame of this utility model.

[0024] Figure 7 This is a schematic diagram of the third action of the folding mechanism of the frame of this utility model.

[0025] Figure 8 This is a side view of the folded state of the frame folding structure of this utility model;

[0026] Figure 9 This is a three-dimensional view of the folded frame structure of this utility model.

[0027] Explanation of reference numerals in the attached drawings: 1-Retracting structure; 11-Pivot rod; 111-Limiting hole; 12-Elastic element; 13-Outer sleeve rod; 131-Positioning block; 132-Retracting handle; 133-Snap-fit ​​part; 14-Pivoting part; 2-Bearing frame; 21-Front frame; 22-Rear frame; 23-Front mechanism; 24-Rear mechanism; 25-Wheel; 26-Positioning rod; 27-Pivoting part; 28-Pivoting element; 29-Reinforcing rod; 3-Linkage mechanism; 31-First linkage rod; 32-Second linkage rod; 33-Third linkage rod; 34-Fourth linkage rod; 35-Positioning component; 36-Snap-fit ​​structure; 37-Positioning seat; 38-Positioning slot; 4-Push handle; 41-Section rotation mechanism; 42-Push grip part. Detailed Implementation

[0028] To facilitate understanding of the technical features, content, advantages, and effects of this utility model, the present utility model is described in detail below with reference to the accompanying drawings and attachments, and in the form of embodiments. The drawings used are for illustrative purposes only and to assist in the description, and may not represent the actual proportions and precise configurations of the present utility model after implementation. Therefore, the proportions and configurations of the accompanying drawings should not be used to interpret or limit the scope of the present utility model in actual implementation. This is hereby stated.

[0029] In the description of this embodiment, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Please see Figures 1 to 4As shown, this utility model provides a folding structure for a bicycle frame, mainly including a folding structure 1, a support frame 2, a linkage mechanism 3, and a push handle 4. The folding structure 1 includes a pivot rod 11, an elastic element 12, an outer sleeve rod 13, and two pivoting parts 14. The two pivoting parts 14 are respectively located at both ends of the pivot rod 11. The pivot rod 11 is a hollow tube, and a limiting hole 111 is formed on at least one side of the outer edge of the pivot rod 11. The limiting hole 111 extends along the axial direction of the pivot rod 11. The outer sleeve rod 13 is fitted around the outer periphery of the pivot rod 11, and the inner edge wall of the outer sleeve rod 13 is configured to correspond to the number and position of the limiting holes 111. There is at least one positioning block 131, which is inserted into the pivot rod 11 through the limiting hole 111. In addition, a retractable handle 132 is provided above the outer sleeve rod 13, and at least one snap-fit ​​member 133 is provided at the bottom of the outer sleeve rod 13. In this embodiment, the snap-fit ​​member 133 is a hook with a hook portion extending along the axial direction of the outer sleeve rod 13. The elastic element 12 is provided at one end inside the pivot rod 11, and both ends of the elastic element 12 are respectively fixed to the positioning block 131 and the wall surface of one end inside the pivot rod 11. Furthermore, at least one reinforcing rod 29 is provided between the two sides of the front frame 21 and the rear frame 22, which is perpendicular to the two sides of the front frame 21 and the rear frame 22.

[0031] The support frame 2 consists of a front frame 21 and a rear frame 22. The front frame 21 is located in front of the retraction structure 1, and the rear frame 22 is located behind the retraction structure 1. The two sides of the front frame 21 and the rear frame 22 near the retraction structure 1 are respectively pivotally connected to the pivot part 14. The two ends of the front frame 21 away from the pivot part 14 are respectively pivotally connected to a front mechanism 23, and the two ends of the rear frame 22 away from the pivot part 14 are respectively pivotally connected to a front mechanism 23. On the rear mechanism 24, a wheel 25 is provided on both sides of the front mechanism 23 and the rear mechanism 24. The front mechanism 23 and the rear mechanism 24 are provided with a positioning rod 26 parallel to the retraction structure 1 at the pivot position between the wheel 25 and the front frame 21 and the rear frame 22. A pivot part 27 is provided on the side of the two positioning rods 26 facing the other positioning rod 26 near both ends. Each pivot part 27 is pivotally connected to one end of a pivot element 28.

[0032] The linkage mechanism 3 includes a first linkage 31, a second linkage 32, a third linkage 33, and a fourth linkage 34. The middle position of the first linkage 31 is pivotally connected to the middle position of the second linkage 32, and the middle position of the third linkage 33 is pivotally connected to the middle position of the fourth linkage 34. The first linkage 31 and the second linkage 32 are arranged intersectingly, and the third linkage 33 and the fourth linkage 34 are arranged intersectingly. Furthermore, one end of the first linkage 31 is pivotally connected to one end of the third linkage 33, and one end of the second linkage 32 and the fourth linkage 34 are pivotally connected. The free ends of the first linkage 31, the second linkage 32, the third linkage 33, and the fourth linkage 34 are all pivotally connected to the pivoting element 28 on the other side of the pivoting part 27. One end is pivotally connected. Furthermore, a positioning component 35 is provided at the pivotal positions of the first connecting rod 31 and the third connecting rod 33, and at the pivotal positions of the second connecting rod 32 and the fourth connecting rod 34. Each positioning component 35 is provided with at least one engaging structure 36. In this embodiment, the engaging structure 36 is a slot for the hook of the engaging component 133 to be hooked and fixed. In addition, a positioning seat 37 is provided on the upper surface of the first connecting rod 31, the second connecting rod 32, the third connecting rod 33 and the fourth connecting rod 34, and a positioning slot 38 is provided on each positioning seat 37. Furthermore, in this utility model, the trolley handle 4 is located above the rear mechanism 24, and the trolley handle 4 includes at least one segment rotation mechanism 41 and a push grip part 42 pivotally connected to the segment rotation mechanism 41.

[0033] Please see Figures 2 to 3 and Figures 5 to 9 As shown, when folding the frame structure provided by this utility model, the user only needs to hold the folding handle 132 of the outer rod 13 in the folding structure 1, and then pull the folding handle 132 to move the outer rod 13 along the axial direction of the pivot rod 11. The positioning block 131 inserted into the limiting hole 111 restricts the movement distance of the outer rod 13. At this time, as the outer rod 13 moves along the axial direction of the pivot rod 11, the snap-fit ​​piece 133 located below the outer rod 13 is simultaneously disengaged. After disengaging the locking structure 36, the user then pulls the folding handle 132 upwards, causing the front frame 21 and rear frame 22 of the support frame 2 to rotate around the pivot part 14 of the folding structure 1. This causes the front frame 21 to drive the front mechanism 23 at its front end to rotate downwards and fold, and the rear frame 22 to drive the rear mechanism 24 at its rear end to rotate downwards and fold. At the same time, the reinforcing rods 29 of the front frame 21 and rear frame 22 disengage from the positioning slots 38 of the positioning seats 37 in the linkage mechanism 3.

[0034] When the front frame 21 drives its front-end mechanism 23 to rotate downwards and fold, and the rear frame 22 drives its rear-end mechanism 24 to rotate downwards and fold, the first connecting rod 31 of the linkage mechanism 3 rotates and folds about the position pivotally connected to the second connecting rod 32, the third connecting rod 33 rotates and folds about the position pivotally connected to the fourth connecting rod 34, and the first connecting rod 31 rotates and folds about the position pivotally connected to the third connecting rod 33, and the second connecting rod 32 rotates and folds about the position pivotally connected to the fourth connecting rod 34. The pivot position of the linkage 34 is for axial rotation and folding. At the same time, the pivot element 28, which is pivotally connected to the first linkage 31, the second linkage 32, the third linkage 33, and the fourth linkage 34, rotates and folds around the pivot position of the first linkage 31, the second linkage 32, the third linkage 33, and the fourth linkage 34, and the pivot position of the pivot part 27 of each positioning rod 26. This allows the frame folding structure provided by this utility model to complete the overall folding action.

[0035] As described above, when folding the frame structure provided by this utility model, it is only necessary to pull the folding handle 132 to disengage the locking member 133 from the locking structure 36, and then pull the folding handle 132 upwards to drive the front frame 21 and rear frame 22 to pivot around the pivot part 14, thereby driving the linkage mechanism 3 to fold together and achieve the purpose of overall folding. Therefore, the frame folding structure provided by this utility model allows users to fold quickly, and each wheel 25 remains under the overall vehicle body after folding, making it convenient for users to push and store. At the same time, since the linkage mechanism 3 is located under the support frame 2 in the frame folding structure provided by this utility model, the size of the loaded goods is not limited. Therefore, compared with the conventional handcart and camping cart structures, the frame folding structure provided by this utility model has the advantages of quick folding, convenient pushing and storage, and no limitation on the size of the load.

[0036] Similarly, when the frame folding structure provided by this utility model is to be unfolded, the user only needs to hold the folding handle 132 and press it down to drive the front frame 21 and rear frame 22 to pivot around the pivot part 14, and drive the linkage mechanism 3 to unfold in conjunction, so that the reinforcing rod 29 is embedded into the positioning slots 38 of each positioning seat 37, and pull the folding handle 132, so that the locking member 133 and the locking structure 36 are locked together, thus completing the unfolding of the vehicle body. Therefore, the frame folding structure provided by this utility model is not only easy to fold, but also very convenient and quick to unfold. Moreover, since the pivot rod 11 is provided with an elastic element 12, and the two ends of the elastic element 12 are respectively fixed to the positioning block 131 and the inner wall of one end of the pivot rod 11, when the user pulls the folding handle... After the handle 132 is released, the outer rod 13 will be pushed back to its original position by the positioning block 131 driven by the elastic element 12. Therefore, after the user pushes the handle 132, there is no need to deliberately push the outer rod 13 back to its original position, which can effectively simplify the user's operation. In addition, in the folding structure of the frame provided by this utility model, the push handle 4 is provided with a push grip part 42 pivotally connected by the segment rotation mechanism 41. Therefore, the angle position of the push grip part 42 can be rotated by the segment rotation mechanism 41, so that the user can adjust the push grip part 42 to a convenient angle to push the folding structure of the frame provided by this utility model. When the folding structure of the frame provided by this utility model is folded, the folding push grip part 42 can be rotated by the segment rotation mechanism 41.

[0037] The above description only illustrates some embodiments of the present utility model, but is not intended to limit the scope of the present utility model patent. For those skilled in the art, various modifications and improvements can be made without departing from the concept of the present utility model, and all such modifications and improvements are within the protection scope of the present utility model.

Claims

1. A folding frame structure, characterized in that, include: A retraction structure, the retraction structure including at least one pivot rod, and a pivoting part is provided at each end of the pivot rod; A support frame includes a front frame and a rear frame, which are respectively located at both ends of a retractable structure. The two sides of the front frame and the rear frame facing the retractable structure are pivotally connected to two pivoting parts. The two sides of the front frame away from the two pivoting parts are pivotally connected to a front mechanism. The two sides of the rear frame away from the two pivoting parts are pivotally connected to a rear mechanism. A wheel is provided on both sides of the bottom of the front mechanism and the rear mechanism. A positioning rod parallel to the retractable structure is provided on the upper part of the front mechanism and the rear mechanism near the wheel. A pivoting part is provided on the side of the positioning rod facing the other positioning rod near both ends. The pivoting part is pivotally connected to one end of a pivoting element. A linkage mechanism includes a first linkage rod, a second linkage rod, a third linkage rod, and a fourth linkage rod. The first linkage rod and the second linkage rod are arranged intersectingly, and the middle position of the first linkage rod is pivotally connected to the middle position of the second linkage rod. The third linkage rod and the fourth linkage rod are arranged intersectingly, and the middle position of the third linkage rod is pivotally connected to the middle position of the fourth linkage rod. One end of the first linkage rod is pivotally connected to one end of the third linkage rod, and one end of the second linkage rod is pivotally connected to one end of the fourth linkage rod. The free ends of the first linkage rod, the second linkage rod, the third linkage rod, and the fourth linkage rod are all pivotally connected to the other end of the pivoting element.

2. The frame folding structure as described in claim 1, characterized in that: The retraction structure also includes an elastic element and an outer sleeve rod. The outer edge of the pivot rod has at least one limiting hole along the axial direction of the pivot rod. The outer sleeve rod is fitted onto the outer edge of the pivot rod, and the inner edge of the outer sleeve rod has a positioning block protruding through the limiting hole. The elastic element is located at one end inside the pivot rod, and both ends of the elastic element are fixed to the inner wall of the pivot rod and the positioning block, respectively.

3. The frame folding structure as described in claim 2, characterized in that: A positioning component is provided at the pivot position between one end of the first linkage rod and the third linkage rod, and / or at the pivot position between the second linkage rod and the fourth linkage rod. The positioning component is provided with at least one engaging structure. At least one engaging member is provided on the surface of the outer sleeve rod facing the linkage mechanism. The engaging member engages with the engaging structure.

4. The frame folding structure as described in claim 3, characterized in that: The latch and the locking structure are corresponding latch hooks and latch slots.

5. The frame folding structure as described in claim 2, characterized in that: The outer sleeve has a retraction handle on its surface away from the linkage mechanism.

6. The frame folding structure as described in claim 1, characterized in that: The vehicle has at least one reinforcing bar between its front frame and / or rear frame, perpendicular to both sides of the front frame and / or rear frame.

7. The frame folding structure as described in claim 6, characterized in that: A positioning seat is provided on the first linkage, the second linkage, the third linkage and / or the fourth linkage, and the positioning seat is provided with a positioning slot for the positioning rods of the front mechanism and the rear mechanism to be inserted.

8. The frame folding structure as described in claim 1, characterized in that: It also includes a cart handle, which is located above the rear mechanism of the vehicle. The cart handle includes at least one rotating mechanism and a grip portion pivotally connected to the rotating mechanism.

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