Trailer frame and trailer
By using a rotating and sliding design for the base frame, front support, and rear support, the problem of complex structure and non-compact folding of existing children's trailer frames is solved, achieving convenient folding and compact space-saving design.
Patent Information
- Application Number
- CN202421724766.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2034-07-19
AI Technical Summary
Existing child trailer frames have complex structures and are not compact when folded, taking up a lot of space.
It adopts a rotating and sliding design of base frame, front bracket and rear bracket. The rear bracket drives the front bracket to move closer to the base frame to achieve folding. Combined with the push handle operation, it is easy to fold.
It achieves a simple structure, convenient folding, and a more compact design after folding, taking up little space.
Smart Images
Figure CN223812609U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to children's trailer technical field especially, relate to a trailer frame and trailer. BACKGROUND
[0002] Children's trailer is widely used as children's walking tool. The existing children's trailer mostly has folding function, generally includes trailer frame, wheel installed below the frame, locking device capable of locking the frame in the open state and seat pocket installed on the frame for children to ride. The existing trailer frame is folded through telescopic mode, and the structure is complex and occupies large space, and the structure is not compact after folding. SUMMARY
[0003] The utility model discloses a trailer frame and trailer, to solve the technical problem that the structure is complex and the structure is not compact after folding in the prior art.
[0004] As conceived above, the technical scheme adopted by the utility model is:
[0005] A trailer frame has a folding state and a use state, comprising:
[0006] A chassis;
[0007] A front support is rotatably arranged at the front end of the chassis;
[0008] A rear support is movably connected to the front support at one end and movably connected to the chassis at the other end;
[0009] In the use state, the rear support is supported between the chassis and the front support to form a load-carrying space with the front support and the chassis;
[0010] When transforming from the use state to the folding state, the rear support slides along the chassis towards the front support and rotates relative to the chassis, and the rear support drives the front support to rotate towards the chassis and makes the rear support fold between the front support and the chassis.
[0011] As a preferred, the upper end of the rear support is movably arranged on the front support, and when transforming from the use state to the folding state, the upper end of the rear support moves backward and drives the lower end of the rear support to move forward.
[0012] As a preferred, the trailer frame further has a support structure, and the rear support is rotatably connected to the support structure, and when the upper end of the rear support moves backward, the rear support rotates relative to the support structure.
[0013] As preferred, the trailer frame further has a handle movable on the front support, the handle being movable between an unfolded position and a folded position, the handle being engaged with the rear support to drive the upper end of the rear support to move rearward when the handle is moved from the unfolded position toward the folded position.
[0014] As preferred, the handle is rotatably mounted on the front support by a handle pivot, the handle having an operation part and an extension part located at opposite sides of the handle pivot, the rear support being rotatably connected with the extension part, the operation part driving the extension part to swing rearward when the handle is moved from the unfolded position toward the folded position.
[0015] In the unfolded position, the operation part is arranged to extend rearward and upward as a whole, and in the folded position, the operation part is arranged to extend forward and upward as a whole.
[0016] As preferred, the support structure comprises a support rod rotatably arranged on the front support, the support rod being supported between the front support and the rear support in the use state, and the support rod being folded between the front support and the rear support in the folded state.
[0017] As preferred, the support structure comprises a support rod rotatably arranged on the base frame, the support rod being supported between the base frame and the rear support in the use state, and the support rod extending downward out of the base frame in the folded state.
[0018] As preferred, the support rod has a first extension part and an arc-shaped part, the first extension part extending along a plane in which the base frame is located in the use state, and the arc-shaped part being arched away from the front support.
[0019] The base frame has a pair of base rods arranged at intervals in left and right directions, the support rod being rotatably mounted on the inner side of the base rods so that the base rods cover the first extension part in the left and right directions in the use state.
[0020] As preferred, the lower end of the rear support is rotatably connected with the base frame by a second pivot, and one end of the support rod is rotatably connected with the rear support by a fourth pivot.
[0021] In the use state, the second pivot is located directly below the fourth pivot, or the second pivot is located obliquely below the fourth pivot and is deviated toward the front support.
[0022] A trailer comprising a seat assembly and a trailer frame as described above, the load-carrying space being used to carry the seat assembly.
[0023] The utility model has the advantages of:
[0024] The trailer frame provided by the utility model is simple in structure, and the rear support drives the front support to close to the chassis, so that folding is convenient; the rear support is folded in the front support and the chassis, so that the structure after folding is more compact, and the occupied space is small. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 is the structure schematic view of the trailer frame provided by the utility model embodiment one;
[0026] Figure 2 is the side view of the trailer frame in the utility model embodiment one in the using state;
[0027] Figure 3 is the side view of the trailer frame in the utility model embodiment one in the using state to the folding state transformation process;
[0028] Figure 4 is the side view of the trailer frame in the utility model embodiment one in the folding state;
[0029] Figure 5 is the side view of the trailer frame in the utility model embodiment two in the using state;
[0030] Figure 6 is the side view of the trailer frame in the utility model embodiment two in the using state to the folding state transformation process;
[0031] Figure 7 is the side view of the trailer frame in the utility model embodiment two in the folding state.
[0032] In the drawing:
[0033] 10, chassis; 11, bottom rod; 12, support part;
[0034] 20, front support; 21, front rod;
[0035] 30, rear support; 31, rear rod;
[0036] 40, support structure; 41, first extension part; 42, arc-shaped part; 43, second extension part;
[0037] 50, push handle; 51, push handle rotating shaft; 52, operation part; 53, extension part;
[0038] 60, sliding part;
[0039] 71, first wheel set; 72, second wheel set;
[0040] 101, first pivot; 102, second pivot; 103, third pivot; 104, fourth pivot; 105, fifth pivot. DETAILED DESCRIPTION
[0041] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.
[0042] In the description of the present application, unless explicitly defined and limited otherwise, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0043] In the present application, unless explicitly defined and limited otherwise, the first feature "on" or "below" the second feature can include the direct contact of the first and second features, or it can include the contact of the first and second features through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0044] The technical scheme of the present application is further illustrated below by specific embodiments in conjunction with the drawings.
[0045] Embodiment one
[0046] Reference Figures 1 to 4The embodiment provides a trailer, which comprises a seat assembly, a trailer frame and a wheel assembly, the trailer frame is used for supporting the seat assembly, and the wheel assembly is arranged at the bottom of the trailer frame to define the up-down direction of the trailer. In the embodiment, the wheel assembly is provided with two groups, namely a first wheel group 71 and a second wheel group 72, the diameter of the first wheel group 71 is smaller than that of the second wheel group 72. The first wheel group 71 can be a front wheel group, and the second wheel group 72 can be a rear wheel group, which defines the front-rear and left-right directions of the trailer. In other embodiments, the first wheel group 71 can be a rear wheel group, and the second wheel group 72 can be a front wheel group.
[0047] The trailer frame has a folding state and a use state, and comprises a base frame 10, a front support 20 and a rear support 30. The front support 20 is rotationally arranged at the front end of the base frame 10. One end of the rear support 30 is movably connected with the front support 20, and the other end is movably connected with the base frame 10. In the use state, the rear support 30 is supported between the base frame 10 and the front support 20 to form a load-carrying space with the front support 20 and the base frame 10. When the use state is changed to the folding state, the rear support 30 slides along the base frame 10 towards the front support 20, and the rear support 30 rotates relative to the base frame 10. The rear support 30 drives the front support 20 to rotate towards the base frame 10, and the rear support 30 is folded between the front support 20 and the base frame 10.
[0048] The folding is realized by rotation and sliding, the structure is simple, the rear support 30 drives the front support 20 to move towards the base frame 10, and the folding is convenient. The rear support 30 is folded between the front support 20 and the base frame 10, so that the structure after folding is more compact and occupies less space.
[0049] Specifically, the lower end of the front support 20 is rotationally connected with the front end of the base frame 10 around a first pivot 101. The front support 20 extends upward and rearward at an angle. The top end of the front support 20 is movably connected with the rear support 30. The front support 20 can extend in a straight line, in a broken line or in an arc.
[0050] The lower end of the rear support 30 is rotationally connected with the base frame 10 around a second pivot 102 and can slide along the base frame 10. The base frame 10 can be provided with a guide groove for accommodating the second pivot 102, and the second pivot 102 can move along the guide groove and rotate in the guide groove. Alternatively, the base frame 10 can be provided with a sliding member 60, the sliding member 60 is slidably connected with the base frame 10, and the lower end of the rear support 30 is rotationally connected with the sliding member 60 through the second pivot 102. The rear support 30 can extend in a straight line, in a broken line or in an arc.
[0051] The upper end of the rear support 30 is movable on the front support 20, and when transforming from the use state to the folding state, the upper end of the rear support 30 moves rearward and drives the lower end of the rear support 30 to move forward, and then the rear support 30 drives the front support 20 to rotate toward the direction of closing to the base frame 10. The rear support 30 and the front support 20 can have relative rotation and relative sliding.
[0052] In the embodiment, the trailer frame further has a push handle 50 movable on the front support 20, the push handle 50 is movable between an unfolded position and a folded position, and the push handle 50 is engaged with the rear support 30 to drive the upper end of the rear support 30 to move rearward when the push handle 50 moves from the unfolded position to the folded position. The folding of the trailer frame is realized by operating the push handle 50, and the operation is convenient.
[0053] When transforming from the use state to the folding state, the operator pushes the push handle 50 to move from the unfolded position to the folded position, the push handle 50 drives the upper end of the rear support 30 to move rearward, and then drives the lower end of the rear support 30 to slide along the base frame 10 toward the direction of closing to the front support 20 and the rear support 30 to rotate relative to the base frame 10.
[0054] The push handle 50 is rotatably installed on the front support 20 through a push handle pivot 51, the push handle 50 has an operating part 52 and an extension part 53 located on opposite sides of the push handle pivot 51, the rear support 30 is rotatably connected with the extension part 53, the operating part 52 drives the extension part 53 to swing rearward when the push handle 50 moves from the unfolded position to the folded position, the operating part 52 extends rearward and upward in the unfolded position, and the operating part 52 extends forward and upward in the folded position. In other embodiments, the operating part 52 can also extend forward and downward or directly forward in the folded position.
[0055] The upper end of the rear support 30 is rotatably connected with the extension part 53 around a third pivot 103. In the use state, the rear support 30 is located below the front support 20, the third pivot 103 is located obliquely below and deviated toward the front support 20 of the push handle pivot 51, so that the operating part 52 as a whole extends rearward and upward, and the push handle 50 is located in the unfolded position. In the use state, the second pivot 102 is located directly below or obliquely below the third pivot 103. It can be that the second pivot 102 is located obliquely below and deviated toward the front support 20 of the third pivot 103.
[0056] In the folding, the operator pushes the push handle 50 to move from the unfolded position to the folded position, the operating part 52 flips forward around the push handle pivot 51 to drive the extension part 53 to swing rearward, the extension part 53 drives the upper end of the rear support 30 to move rearward, and then drives the lower end of the rear support 30 to slide along the base frame 10 toward the direction of closing to the front support 20 and the rear support 30 to rotate relative to the base frame 10. Figure 2 The arrow shown in the middle indicates the folding direction.
[0057] In use, the chassis 10, the front support 20, the rear support 30 and the handle 50 form a quadrilateral, and the first pivot 101, the second pivot 102, the third pivot 103 and the handle pivot 51 are four vertices of the quadrilateral. The quadrilateral structure is stable, and the rear support 30 supports the front support 20 through the handle 50 because the third pivot 103 is below the handle pivot 51, thereby ensuring the stability of the front support 20.
[0058] The chassis 10 can be a U-shaped or rectangular frame. In the embodiment, the chassis 10 includes a pair of bottom rods 11 spaced apart in the left-right direction and a support portion 12 arranged between the pair of bottom rods 11, which supports the two bottom rods 11. The front support 20 and the rear support 30 are connected to the bottom rods 11.
[0059] The bottom rod 11 can extend along the horizontal plane, i.e., parallel to the front-rear direction, or can extend obliquely relative to the horizontal plane, or can extend in a bent manner. The sliding member 60 is slidingly connected to the chassis 10, specifically, the sliding member 60 is slidingly connected to the bottom rod 11, and the sliding direction of the sliding member 60 can be parallel to the front-rear direction, or can be oblique relative to the horizontal plane, or even the sliding direction of the sliding member 60 can be curved, as long as it does not cause the sliding member 60 to be stuck. In the embodiment, the bottom rod 11 extends linearly and gradually inclines upward in the direction from the second pivot 102 to the first pivot 101.
[0060] The support portion 12 and the bottom rod 11 can be integrally formed, fixedly connected or rotatably connected. In the embodiment, the support portion 12 is U-shaped, and the two ends of the support portion 12 are rotatably connected to the bottom rods 11. When folding, the support portion 12 can be rotated and folded between the two bottom rods 11.
[0061] In the embodiment, the support portion 12 is located at the front end of the bottom rod 11. In other embodiments, the support portion 12 can be located at the rear end or the middle of the bottom rod 11. Optionally, at least two support portions 12 are provided, and each support portion 12 is arranged spaced apart in the front-rear direction. The front end of the bottom rod 11 is provided with a mounting seat, and the front support 20, the support portion 12 and the first wheel set 71 are connected to the mounting seat.
[0062] The front support 20 includes a pair of front rods 21 spaced apart in the left-right direction, and the front rods 21 are connected to the bottom rods 11. The rear support 30 includes a pair of rear rods 31 spaced apart in the left-right direction, one end of the rear rod 31 is connected to the bottom rod 11, and the other end of the rear rod 31 is connected to the handle 50. The handle 50 can be a split structure or an integral structure. The handle 50 can be U-shaped or rectangular. In the embodiment, the handle 50 is a U-shaped rod, and the handle 50 is arranged between the two front rods 21, so that the handle 50 is folded on the inner side of the two front rods 21 when the trailer frame is folded. The space is fully utilized, so that the size after folding is smaller.
[0063] The trailer frame further comprises a support structure 40, the rear support 30 is rotationally connected with the support structure 40, when the upper end of the rear support 30 moves relatively rearward, the rear support 30 rotates relative to the support structure 40. Specifically, the support structure 40 is rotationally connected with the rear support 30 around a fourth pivot 104, the fourth pivot 104 is located between the second pivot 102 and the third pivot 103.
[0064] In the embodiment, the support structure 40 comprises a support rod rotationally arranged on the front support 20, in the use state, the support rod is supported between the front support 20 and the rear support 30; in the folding state, the support rod is folded between the front support 20 and the rear support 30. In the use state, the support rod plays a supporting role to ensure that the trailer frame is stably kept in the use state. When folding, as the front support 20 and the rear support 30 move towards the base frame 10, the support rod moves towards the base frame 10 and is folded between the front support 20 and the rear support 30, so that the structure after folding is more compact and occupies less space.
[0065] It can be that one end of the support rod is rotationally connected with the rear support 30 around the fourth pivot 104, and the other end of the support rod is rotationally connected with the front support 20 around a fifth pivot 105. In the use state, the second pivot 102 is located directly below the fourth pivot 104; or, the second pivot 102 is located obliquely below the fourth pivot 104 and is deviated towards the front support 20. The support rod and the rear support 30 simultaneously provide support to the front support 20, so that the front support 20 is more stable. The fifth pivot 105 is located between the first pivot 101 and the push handle pivot 51. In the folding or unfolding process, the support rod rotates around the fifth pivot 105.
[0066] The movable connection can be a rotational connection, a sliding connection, or both a rotational and a sliding connection. In other embodiments, the support structure 40 comprises a support rod, one end of the support rod away from the rear support 30 is rotationally connected with the front support 20 around the fifth pivot 105 and is capable of sliding along the front support 20, the fifth pivot 105 is located between the first pivot 101 and the push handle pivot 51. In the folding or unfolding process, the support rod not only rotates around the fifth pivot 105 but also slides along the front support 20. Specifically, a sliding groove can be provided on the front support 20, and the fifth pivot 105 is slidingly arranged in the sliding groove.
[0067] The front support 20 is provided with mounting holes for passing the fifth pivot 105, at least two mounting holes can be provided corresponding to each fifth pivot 105, and the fifth pivot 105 is passed in the corresponding mounting hole as needed in use.
[0068] In the use state, the chassis 10, the front support 20, the rear support 30 and the support structure 40 form a quadrilateral; the front support 20 can be provided with stable support. In the folding state, the support structure 40 is located on the upper side of the chassis 10; the structure is compact and occupies small space.
[0069] Embodiment two
[0070] Figures 5 to 7 Embodiment two is shown, wherein the same or corresponding parts as embodiment one adopt the corresponding reference numerals of embodiment one. For the sake of simplicity, only the difference between embodiment two and embodiment one is described. The difference is that the support structure 40 comprises a support rod rotatably arranged on the chassis 10, which supports between the chassis 10 and the rear support 30 in the use state; and which extends downward out of the chassis 10 in the folding state.
[0071] In the use state, the support rod plays a supporting role to ensure that the trailer frame is stably maintained in the use state. In the folding state, as the front support 20 and the rear support 30 move towards the chassis 10, the support rod moves towards the chassis 10 and extends downward out of the chassis 10, thereby making full use of the space.
[0072] The one end of the support rod can be rotatably connected with the rear support 30 around the fourth pivot 104, which is located between the second pivot 102 and the third pivot 103, and the other end of the support rod is movably connected with the chassis 10. The support rod is supported by the chassis 10, the rear support 30 is supported by the support rod, and the front support 20 is supported by the rear support 30, thereby providing stable support for the front support 20.
[0073] In this embodiment, the one end of the support rod away from the rear support 30 is rotatably connected with the chassis 10 around the fifth pivot 105, which is located between the first pivot 101 and the second pivot 102. In the folding state, as the front support 20 and the rear support 30 move towards the chassis 10, the support rod rotates around the chassis 10 and extends to the lower part of the chassis 10.
[0074] The movable connection can be a rotary connection, a sliding connection or a combination of rotary and sliding connections. In other embodiments, the support structure 40 comprises a support rod, the one end of the support rod away from the rear support 30 is rotatably connected with the chassis 10 around the fifth pivot 105 and can slide along the chassis 10, and the fifth pivot 105 is located between the first pivot 101 and the second pivot 102. In the folding or unfolding process, the support rod not only rotates around the fifth pivot 105 but also slides along the first pivot 101. Specifically, a sliding groove can be arranged on the chassis 10, and the fifth pivot 105 is slidably arranged in the sliding groove.
[0075] The support rod can extend in a straight line, in a zigzag line or in an arc shape. In the embodiment, the support rod has a first extending portion 41 and an arc-shaped portion 42. In the use state, the first extending portion 41 extends along the plane where the base frame 10 is located, and the arc-shaped portion 42 arches towards the direction away from the front support 20, thereby ensuring the support and making full use of the space.
[0076] The base frame 10 has a pair of bottom rods 11 arranged at intervals in the left-right direction, and the support rod is rotatably installed on the inner side of the bottom rod 11, so that in the use state, the bottom rod 11 covers the first extending portion 41 in the left-right direction, thereby making the structure compact and ensuring the neat appearance. In the folded state, at least part of the arc-shaped portion 42 protrudes below the base frame 10.
[0077] The support rod also has a second extending portion 43, and the first extending portion 41, the arc-shaped portion 42 and the second extending portion 43 are sequentially connected. In the use state, the second extending portion 43 is located behind the rear support 30, thereby ensuring the stable support. Specifically, the first extending portion 41 is rotatably connected with the base frame 10, and the second extending portion 43 is rotatably connected with the rear support 30.
[0078] The above embodiments only illustrate the basic principles and characteristics of the present application, and the present application is not limited by the above embodiments. Without departing from the spirit and scope of the present application, various changes and modifications can be made to the present application, and these changes and modifications all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.
Claims
1. A trailer frame, characterized in that, The trailer frame has a folding state and a using state, comprising: a bottom frame; a front support rotatably arranged at a front end of the bottom frame; a rear support having one end movably connected with the front support and the other end movably connected with the bottom frame; in the using state, the rear support is supported between the bottom frame and the front support to form a carrying space with the bottom frame and the front support; in the using state, when transforming to the folding state, the rear support slides along the bottom frame towards the front support and rotates relative to the bottom frame, the rear support drives the front support to rotate towards the bottom frame and makes the rear support fold between the front support and the bottom frame.
2. The trailer frame of claim 1, wherein, an upper end of the rear support is movably arranged on the front support, in the using state, when transforming to the folding state, the upper end of the rear support moves backward and drives the lower end of the rear support to move forward.
3. The trailer frame of claim 2, wherein, the trailer frame further has a support structure, the rear support is rotatably connected with the support structure, in the using state, when the upper end of the rear support moves backward, the rear support rotates relative to the support structure.
4. The trailer frame of claim 3, wherein, the trailer frame further has a handle movably arranged on the front support, the handle has an unfolded position and a folded position, the handle is engaged with the rear support to drive the upper end of the rear support to move backward when the handle moves from the unfolded position to the folded position.
5. The trailer frame of claim 4, wherein, the handle is rotatably arranged on the front support through a handle pivot, the handle has an operating part and an extension part located at opposite sides of the handle pivot, the rear support is rotatably connected with the extension part, in the using state, when the handle moves from the unfolded position to the folded position, the operating part drives the extension part to swing backward. in the unfolded position, the operating part extends upward and backward, in the folded position, the operating part extends upward and forward.
6. The trailer frame of claim 3, wherein, the support structure comprises a support rod rotatably arranged on the front support, in the using state, the support rod is supported between the front support and the rear support, in the folding state, the support rod is folded between the front support and the rear support.
7. The trailer frame of claim 3, wherein, the support structure comprises a support rod rotatably arranged on the bottom frame, in the using state, the support rod is supported between the bottom frame and the rear support, in the folding state, the support rod extends downward out of the bottom frame.
8. The trailer frame of claim 7, wherein, the support rod has a first extension part and an arc part, in the using state, the first extension part extends along a plane where the bottom frame is located, the arc part arches away from the front support. the bottom frame has a pair of bottom rods arranged at intervals in left and right directions, the support rod is rotatably arranged on the inner side of the bottom rods, in the using state, the bottom rods cover the first extension part in the left and right directions.
9. The trailer frame of any of claims 6-8, wherein, a lower end of the rear support is rotatably connected with the bottom frame through a second pivot, one end of the support rod is rotatably connected with the rear support through a fourth pivot. in the using state, the second pivot is located directly below the fourth pivot, or the second pivot is located obliquely below the fourth pivot and deviates towards the front support.
10. A trailer characterized in that, the trailer frame comprises a seat assembly and the trailer frame according to any one of claims 1-9, the carrying space is used for carrying the seat assembly.