Linkage folding small cart

Abstract

The linkage folding small cart comprises a lifting part, a moving assembly and a pressure bearing assembly, and the lifting part and the moving assembly are rotationally connected with the pressure bearing assembly from the connecting position; the pressure-bearing assembly is arranged in a telescopic mode, a first linkage piece is arranged between the pressure-bearing assembly and the lifting piece, and when the pressure-bearing assembly is folded, the lifting piece synchronously rotates in the direction close to the pressure-bearing assembly; a second linkage piece is arranged between the lifting piece and the moving assembly, and when the lifting piece rotates relative to the pressure-bearing assembly, the moving assembly synchronously rotates relative to the pressure-bearing assembly; the small cart can be rapidly folded and stored through one key, all assemblies of the small cart can be linked, unfolding and storage can be rapidly completed, the use efficiency is greatly improved, and time is saved.

Description

Technical Field

[0001] This utility model belongs to the field of outdoor products, specifically relating to a folding trolley. Background Technology

[0002] When engaging in outdoor activities such as camping, carrying a small trolley can greatly improve the efficiency of transporting items. To facilitate carrying and reduce space occupation, most outdoor trolleys are foldable. The structure of a trolley includes wheels, a tray, and a backrest. The tray and backrest are perpendicular to each other, and the wheels are perpendicular to the other side of the backrest. Due to the large size of the trolley, the wheels, tray, and backrest all need to be folded. Because of the multiple folding structures, the operation is relatively complicated. In actual use, folding and unfolding the trolley takes a lot of time, leading to a negative experience during outdoor activities. Utility Model Content

[0003] To solve the above problems, this utility model proposes a linkage folding trolley. When folding, simply disconnect the locking part and the sleeve. The elastic part will reliably contract to fold the pressure-bearing component. At the same time, due to the relaxation of the elastic part, the pulling force of the tensioning part can bring the supporting part and the pressure-bearing component together. The moving component will also be linked and put together. The operation is convenient and quick, saving a lot of storage time.

[0004] Specific solution: A linkage folding trolley includes a lifting component, a moving component, and a pressure-bearing component, wherein the lifting component and the moving component are rotatably connected to the pressure-bearing component from the connection point.

[0005] The pressure-bearing component is telescopically designed, and a first linkage is provided between the pressure-bearing component and the supporting component. When the pressure-bearing component is folded, the supporting component rotates synchronously towards the pressure-bearing component.

[0006] A second linkage is provided between the lifting component and the moving component, so that when the lifting component rotates relative to the pressure-bearing component, the moving component rotates synchronously relative to the pressure-bearing component.

[0007] When the pressure-bearing component is folded, the supporting and moving components also rotate synchronously to fit into the pressure-bearing component. Multiple parts can be folded by operating one point, which improves storage efficiency.

[0008] Furthermore, the pressure-bearing assembly includes multiple pressure-bearing components and locking components. The pressure-bearing components include sleeves and blocking components, with the blocking components fixed to the sleeves. The sleeves of the multiple pressure-bearing components are interlocked and can slide relative to each other, and a locking component is provided between two adjacent sleeves.

[0009] The sleeves are interlocked to achieve foldability, while locking elements are used to fix them in place, keeping the pressure-bearing components in an extended or contracted state.

[0010] Furthermore, the second linkage component includes a screw, a sleeve, and a limiting groove;

[0011] The sleeve is fixed to the pressure-bearing component via a connecting bearing. The sleeve has an internal thread, and a movable component is fixed to the outside of the sleeve.

[0012] The limiting groove is a cuboid groove with openings on both sides, and the limiting groove is fixed to the supporting component;

[0013] The screw and the limiting groove are rotatably connected, and there is a distance difference between the connection point and the two sides. The screw and the sleeve are fixed by threads, and the groove wall of the limiting groove and the lower edge of the sleeve are in contact.

[0014] The moving component includes two moving wheels, and each moving wheel is connected to the pressure-bearing component by a second linkage component, with the threads of the two screws in opposite directions.

[0015] In the first case, the connection point can be set so that the lifting component and the pressure-bearing component are perpendicular to each other when the connection point is close to the lower edge of the sleeve. When the lifting component rotates, the screw moves down and the two moving wheels rotate in the same direction.

[0016] In another scenario, the connection point can be set so that the lifting component and the pressure-bearing component are perpendicular to each other when the connection point is far from the lower edge of the sleeve. In this case, the screw moves upward when the lifting component rotates. Unlike the first scenario, the thread direction of the two screws is opposite to that of the first scenario, and the two moving wheels still rotate in the direction that brings them closer to each other.

[0017] In other words, taking the first case as an example, when the supporting component rotates, the edge of the limiting groove and the lower edge of the sleeve rotate in contact. Gradually, the contact with the sleeve on one side changes to the release from the sleeve on the other side. Gradually, the distance between the connection point and the lower edge of the sleeve increases, and the screw moves downward. Under the action of the thread, the downward movement of the screw drives the sleeve to rotate, thereby causing the moving component to rotate 90° from being perpendicular to the pressure-bearing component to being in contact with the pressure-bearing component. Here, the ratio between the thread pitch and the downward movement distance of the screw determines the angle of the sleeve rotation. Those skilled in the art can set a suitable ratio based on existing knowledge. The direction of the thread determines the rotation direction of the sleeve, and those skilled in the art can also make adaptive adjustments.

[0018] Furthermore, the first linkage includes an elastic member and a tension member. One end of the elastic member is connected to the side of the lifting member away from the connection point, and the other end of the elastic member is connected to the side of the pressure-bearing component away from the connection point. A tension member providing tension is provided between the lifting member and the pressure-bearing component at the connection point.

[0019] The elastic component has a greater tensile force than the tension component, and the two forces acting on the support component are in opposite directions. When unfolded, the elastic component stretches, pulling the support component perpendicular to the pressure-bearing component. At this time, the tension component is also in a stretched state. When retracted, the elastic component contracts, gradually losing its tension on the support component. At this time, the tension component contracts again, pulling the support component closer to the pressure-bearing component.

[0020] Furthermore, the bottom of the lifting component is provided with a guide channel, through which the elastic component passes and connects to the lifting component; the guide channel not only guides and limits the elastic component, but also provides protection.

[0021] Furthermore, the sleeve is hollow inside, and the elastic element passes through the sleeve and connects to the pressure-bearing component, eliminating the need for the elastic element to occupy additional space and reducing the impact of the external environment on the elastic element.

[0022] Furthermore, the locking component includes a pin and a socket. A groove is provided at the connection between the blocking component and the sleeve. The pin is set in the groove and can slide along the groove. Anti-disengagement rings are provided between two adjacent sleeves to prevent them from disengaging during sliding. The socket is set close to the anti-disengagement rings. The pin is inserted into the socket to lock the sleeve in a telescopic manner.

[0023] Furthermore, the tension component is elastic; when the supporting component rotates away from the pressure-bearing component, the tension component is in a stretched state.

[0024] Furthermore, the vertical length of the lifting component is the same as the vertical length of the pressure-bearing component after it is folded up, and it is close to a cuboid after folding, making it easy to store.

[0025] Furthermore, the length of the elastic component in its relaxed state is greater than or equal to the sum of the vertical lengths of the supporting component and the retracted pressure-bearing component. Folding ensures that the elastic component is in a relaxed state, which can increase the service life of the elastic component.

[0026] The beneficial effects of this utility model are as follows:

[0027] (1) The small trolley of this utility model can be quickly folded and stored with one click. All components of the small trolley can be linked together, and both unfolding and storage can be completed quickly, which greatly improves the efficiency of use and saves time.

[0028] (2) The small trolley of this utility model occupies little space after being folded and has extremely high portability. Attached Figure Description

[0029] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0030] Figure 1 This is a schematic diagram showing the usage state of an embodiment of this utility model;

[0031] Figure 2 This is a schematic diagram of the folded state of an embodiment of the present invention;

[0032] Figure 3 This is a diagram showing the internal distribution of the first linkage component in an embodiment of this utility model.

[0033] Figure 4 This is a schematic diagram of the second linkage component in an embodiment of the present utility model;

[0034] Figure 5 This is a schematic diagram of the locking component structure in an embodiment of the present utility model;

[0035] In the attached drawings: 1-lifting component, 11-guide channel, 2-pressure bearing component, 21-pressure bearing component, 211-sleeve, 212-blocking component, 22-locking component, 221-pin, 222-insertion hole, 3-moving component, 4-first linkage component, 41-elastic component, 42-tension component, 5-second linkage component, 51-screw, 52-sleeve, 53-limiting groove. Detailed Implementation

[0036] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0038] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0041] like Figure 1-5 As shown, a linkage folding trolley includes a lifting component 1, a moving component 3, and a pressure-bearing component 2, wherein the lifting component 1 and the moving component 3 are rotatably connected to the pressure-bearing component 2 from the connection point.

[0042] The pressure-bearing component 2 is telescopically designed, and a first linkage 4 is provided between the pressure-bearing component 2 and the lifting component 1. When the pressure-bearing component 2 is folded, the lifting component 1 rotates synchronously towards the pressure-bearing component 2.

[0043] A second linkage 5 is provided between the lifting component 1 and the moving component 3. When the lifting component 1 rotates relative to the pressure-bearing component 2, the moving component 3 rotates synchronously relative to the pressure-bearing component 2.

[0044] Both the lifting component 1 and the moving component 3 have limited rotation, allowing them to rotate only within the range of 0°-90°.

[0045] When the pressure-bearing component 2 is folded, the supporting component 1 and the moving component 3 also rotate synchronously to fit into the pressure-bearing component 2. Multiple parts can be folded by operating one point, which improves storage efficiency.

[0046] In one specific embodiment, such as Figure 5 As shown, the pressure-bearing component 2 includes multiple pressure-bearing parts 21 and locking parts 22. The pressure-bearing parts 21 include sleeves 211 and blocking parts 212. The blocking parts 212 are fixed to the sleeves 211. The sleeves 211 of the multiple pressure-bearing parts 21 are sleeved together and can slide relative to each other. A locking part 22 is provided between two adjacent sleeves 211.

[0047] The blocking element 212 is a horizontal bar, and two sleeves 211 are arranged in parallel, with the horizontal bar located between the two.

[0048] The sleeves 211 are interlocked to achieve foldability, while the locking element 22 is used to fix them so that the pressure-bearing element 21 is held in the extended or contracted state.

[0049] In one specific embodiment, such as Figure 4As shown, the second linkage 5 includes a screw 51, a sleeve 52, and a limiting groove 53;

[0050] The sleeve 52 is fixed to the pressure-bearing component 2 via a connecting bearing. The sleeve 52 has an internal thread, and the movable component 3 is fixed to the outside of the sleeve 52.

[0051] The limiting groove 53 is a cuboid groove with openings on both sides, and the limiting groove 53 is fixed to the lifting member 1;

[0052] The screw 51 and the limiting groove 53 are rotatably connected, and there is a distance difference between the connection point and the two sides. The screw 51 and the sleeve 52 are threadedly fixed, and the groove wall of the limiting groove 53 and the lower edge of the sleeve 52 are in contact.

[0053] The moving component 3 includes two moving wheels, and each moving wheel is provided with a second linkage component between itself and the pressure-bearing component 2, and the threads of the two screws 51 are opposite.

[0054] In one alternative example, the connection point can be set so that when the connection point is close to the lower edge of the sleeve 52, the lifting member 1 and the pressure-bearing component 2 are perpendicular to each other. When the lifting member 1 rotates, the screw 51 moves downward and the two moving wheels rotate simultaneously in the direction of approaching each other.

[0055] When the lifting component 1 rotates, the edge of the limiting groove 53 contacts and rotates with the lower edge of the sleeve 52. The contact with the sleeve 52 on one side gradually changes to the release from the sleeve 52 on the other side. Gradually, the distance between the connection point and the lower edge of the sleeve 52 increases, and the screw 51 moves downward. Under the action of the thread, the downward movement of the screw 51 drives the sleeve 52 to rotate, thereby causing the moving component 3 to rotate 90° from being perpendicular to the pressure-bearing component 2 to being in contact with the pressure-bearing component 2. The ratio between the thread pitch and the downward movement distance of the screw 51 determines the rotation angle of the sleeve 52. Those skilled in the art can set a suitable ratio based on existing knowledge. The direction of the thread determines the rotation direction of the sleeve 52, and those skilled in the art can also make adaptive adjustments.

[0056] Another preferred example can be set such that when the connection point is far from the lower edge of the sleeve 52, the lifting member 1 and the pressure-bearing component 2 are perpendicular to each other. In this case, when the lifting member 1 rotates, the screw 51 moves upward. Unlike the first case mentioned above, the thread direction of the two screws 51 is opposite to that of the above case, and the two moving wheels still rotate in the direction that brings them closer to each other.

[0057] In one specific embodiment, such as Figure 3 As shown, the first linkage 4 includes an elastic member 41 and a tension member 42. One end of the elastic member 41 is connected to the side of the lifting member 1 away from the connection point, and the other end of the elastic member 41 is connected to the side of the pressure-bearing component 2 away from the connection point. A tension member 42 providing tension is provided between the lifting member 1 and the pressure-bearing component 2 at the connection point.

[0058] The elastic element 41 and the tension element 42 are elastic ropes or springs.

[0059] The tension of the elastic element 41 is greater than that of the tension element 42, and the two tensions acting on the support element 1 are in opposite directions. When unfolded, the elastic element 41 stretches, pulling the support element 1 perpendicular to the pressure-bearing component 2. At this time, the tension element 42 is also in a stretched state. When retracted, the elastic element 41 contracts, and gradually loses its tension on the support element 1. At this time, the tension element 42 contracts again, pulling the support component closer to the pressure-bearing component 2.

[0060] In one specific embodiment, such as Figure 3 As shown, the bottom of the lifting component 1 is provided with a guide channel 11, and the elastic component 41 passes through the guide channel 11 and is connected to the lifting component; the guide channel 11 not only guides and limits the elastic component 41, but also provides protection.

[0061] In one specific embodiment, such as Figure 3 As shown, the sleeve 211 is hollow inside, and the elastic element 41 passes through the sleeve 211 and is connected to the pressure-bearing component 2. The elastic element 41 does not need to occupy extra space, and the influence of the external environment on the elastic element 41 is also reduced.

[0062] In one specific embodiment, such as Figure 5 As shown, the locking member 22 includes a pin 221 and a socket 222. A groove is provided at the connection between the blocking member 212 and the sleeve 211. The pin 221 is set in the groove and can slide along the groove. Anti-disengagement rings are provided between two adjacent sleeves 211 to prevent them from disengaging during sliding. The socket 222 is set close to the anti-disengagement rings. The pin 221 is inserted into the socket 222 to lock the sleeve 211 in a telescopic manner.

[0063] In one specific embodiment, the tension member 42 is elastic, and when the lifting member 1 rotates away from the pressure-bearing component 2, the tension member 42 is in a stretched state.

[0064] In one specific embodiment, the vertical length of the lifting component 1 is the same as the vertical length of the pressure-bearing component 2 after it is contracted, and it is close to a cuboid after folding, making it easy to store.

[0065] In one specific embodiment, the length of the elastic member 41 in the relaxed state is greater than or equal to the sum of the vertical lengths of the supporting member 1 and the retracted pressure-bearing component 2. After folding, the elastic member 41 is kept in a relaxed state, which can increase the service life of the elastic member 41.

[0066] When not in use, the trolley is in a folded-out state, with both the elastic element 41 and the tension element 42 in a relaxed state, extending their service life. When in use, the crossbar of the pressure-bearing element 21 is pulled to extend the pressure-bearing component 2. At this time, the elastic element 41 is stretched, and the elastic force causes it to pull the lifting element 1 to rotate. Meanwhile, the second linkage element 5 drives the moving component 3 to rotate. Simply pulling the pressure-bearing element 21 can fully unfold the folded trolley. The pressure-bearing component 2 can be fixed in place by the locking element 22. After use, the locking element 22 is opened. Under the action of the elastic element 41, the pressure-bearing element 21 quickly retracts and folds. At the same time, as the elastic force of the elastic element 41 gradually decreases, the tension of the tension element 42 will pull the lifting element 1 to rotate in the direction of fitting the pressure-bearing component 2. Simultaneously, the second linkage element 5 drives the moving component 3 to rotate to complete the folding.

[0067] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0068] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0069] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A linkage folding pony cart comprising a lifting member, a moving assembly and a load bearing assembly, characterised in that, The lifting piece and the moving assembly are respectively rotationally connected with the self-connection position of the pressure bearing assembly; The pressure bearing assembly is telescopic, a first linkage is arranged between the pressure bearing assembly and the lifting piece, and the lifting piece is synchronously rotated towards the pressure bearing assembly when the pressure bearing assembly is folded; A second linkage is arranged between the lifting piece and the moving assembly, and the moving assembly is synchronously rotated relative to the pressure bearing assembly when the lifting piece is rotated relative to the pressure bearing assembly.

2. A linkage folding gooseneck trailer as claimed in claim 1, wherein, The pressure bearing assembly comprises a plurality of pressure bearing pieces and locking pieces, the pressure bearing piece comprises a sleeve and a blocking piece, and the blocking piece is fixed to the sleeve; the sleeves of the plurality of pressure bearing pieces are sleeved with each other and are relatively slidable, and the locking piece is arranged between adjacent two sleeves.

3. A linkage folding gooseneck trailer as claimed in claim 1, wherein, The second linkage comprises a screw rod, a sleeve and a limiting groove; The sleeve is fixed to the pressure bearing assembly through the connecting bearing, the sleeve is internally provided with an internal thread, and the moving assembly is fixed to the outside of the sleeve; The limiting groove is a long rectangular groove with open sides, and the limiting groove is fixed to the lifting piece; The screw rod and the limiting groove are rotationally connected, there is a distance difference between the connecting point and the two side faces, the screw rod and the sleeve are threadedly fixed, and the groove wall of the limiting groove and the lower edge of the sleeve are in abutment.

4. A linkage folding gooseneck trailer as claimed in claim 2, wherein, The first linkage comprises a resilient piece and a tension piece, one end of the resilient piece is connected to one side of the lifting piece away from the connecting position, the other end of the resilient piece is connected to one side of the pressure bearing assembly away from the connecting position, and the tension piece is arranged between the lifting piece and the pressure bearing assembly at the connecting position.

5. A linkage folding gooseneck trailer as claimed in claim 4, wherein, The bottom of the lifting piece is provided with a guide channel, and the resilient piece is connected to the lifting piece through the guide channel.

6. A linkage folding gooseneck trailer as claimed in claim 5, wherein, The sleeve is internally hollow, and the resilient piece is connected to the pressure bearing assembly through the sleeve.

7. A linkage folding gooseneck trailer as claimed in claim 2, wherein, The locking piece comprises a pin and a plug hole, the connecting position of the blocking piece and the sleeve is provided with a sliding groove, the pin is arranged in the sliding groove and is slidable along the sliding groove, a anti-disengagement stop ring is arranged between adjacent two sleeves to prevent mutual disengagement during sliding, the plug hole is arranged close to the anti-disengagement stop ring, and the pin is inserted into the plug hole to lock the sleeve in extension and contraction.

8. A linkage folding gooseneck trailer as claimed in claim 4, wherein, The tension piece is elastic, and the tension piece is in a stretched state when the lifting piece is rotated away from the pressure bearing assembly.

9. A linkage folding gooseneck trailer as claimed in claim 2, wherein, The length of the lifting piece in the vertical direction is the same as the length of the pressure bearing assembly after contraction in the vertical direction.

10. A linkage folding gooseneck trailer as claimed in claim 4, wherein, The length of the resilient piece in a relaxed state is greater than or equal to the sum of the lengths of the lifting piece and the pressure bearing assembly after contraction in the vertical direction. The length of the resilient piece in a relaxed state is greater than or equal to the sum of the lengths of the lifting piece and the pressure bearing assembly after contraction in the vertical direction.

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